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// gb.hpp - v0.31 - public domain C++11 helper library - no warranty implied; use at your own risk
// (Experimental) A C++11 helper library without STL geared towards game development
/*
LICENSE
This software is in the public domain. Where that dedication is not
recognized, you are granted a perpetual, irrevocable license to copy,
distribute, and modify this file as you see fit.
WARNING
- This library is _highly_ experimental and features may not work as expected.
- This also means that many functions are not documented.
- This library is not compatible with STL at all! (By design)
CONTENTS:
- Common Macros
- Assert
- Types
- Type Traits
- C++11 Move Semantics
- Defer
- Casts
- bit_cast
- pseudo_cast
- Memory
- Mutex
- Atomics
- Semaphore
- Thread
- Allocator
- Heap Allocator
- Arena Allocator
- Functions
- String
- Array
- Hash Table
- Hash Functions
*/
/*
Version History:
0.31 - Remove `_Allocator` suffix for allocator types
0.30 - sort::quick
0.29 - GB_ASSERT prints call stack
0.28 - Pool Allocator
0.27 - Dealloc to Free & More Hashing Functions
0.26a - Heap_Allocator Fix
0.26 - Better Allocation system
0.25a - Array bug fix
0.25 - Faster Heap_Allocator for Windows using HeapAlloc
0.24b - Even More Hash_Table Bug Fixes
0.24a - Hash_Table Bug Fixes
0.24 - More documentation and bug fixes
0.23 - Move Semantics for Array and Hash_Table
0.22 - Code rearrangment into namespaces
0.21d - Fix array::free
0.21c - Fix Another Typo causing unresolved external symbol
0.21b - Typo fixes
0.21a - Better `static` keywords
0.21 - Separate Math Library
0.20a - #ifndef for many macros
0.20 - Angle
0.19 - Cache friendly Transform and String fixes
0.18 - Hash_Table bug fixes
0.17 - Death to OOP
0.16 - All References are const convention
0.15 - Namespaced Types
0.14 - Casts and Quaternion Look At
0.13a - Fix Todos
0.13 - Basic Type Traits
0.12 - Random
0.11 - Complex
0.10 - Atomics
0.09 - Bug Fixes
0.08 - Matrix(2,3)
0.07 - Bug Fixes
0.06 - Os spec ideas
0.05 - Transform Type and Quaternion Functions
0.04 - String
0.03 - Hash Functions
0.02 - Hash Table
0.01 - Initial Version
*/
#ifndef GB_INCLUDE_GB_HPP
#define GB_INCLUDE_GB_HPP
#if !defined(__cplusplus) && __cplusplus >= 201103L
#error This library is only for C++11 and above
#endif
// NOTE(bill): Because static means three different things in C/C++
// Great Design(!)
#ifndef global_variable
#define global_variable static
#define internal_linkage static
#define local_persist static
#endif
/*
Example for static defines
global_variable const f32 TAU = 6.283185f;
global_variable void* g_memory;
internal_linkage void
some_function(...)
{
local_persist u32 count = 0;
...
count++;
...
}
*/
// `global_variable` : variable is in the global scope
// `internal_linkage` : function is only visible for this linkage
// `local_persist` : variable persists for the particular function scope
#if defined(_MSC_VER)
#define _ALLOW_KEYWORD_MACROS
#ifndef alignof // Needed for MSVC 2013 'cause Microsoft "loves" standards
#define alignof(x) __alignof(x)
#endif
#endif
////////////////////////////////
// //
// System OS //
// //
////////////////////////////////
#if defined(_WIN32) || defined(_WIN64)
#ifndef GB_SYSTEM_WINDOWS
#define GB_SYSTEM_WINDOWS 1
#endif
#elif defined(__APPLE__) && defined(__MACH__)
#ifndef GB_SYSTEM_OSX
#define GB_SYSTEM_OSX 1
#endif
#elif defined(__unix__)
#ifndef GB_SYSTEM_UNIX
#define GB_SYSTEM_UNIX 1
#endif
#if defined(__linux__)
#ifndef GB_SYSTEM_LINUX
#define GB_SYSTEM_LINUX 1
#endif
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#ifndef GB_SYSTEM_FREEBSD
#define GB_SYSTEM_FREEBSD 1
#endif
#else
#error This UNIX operating system is not supported by gb.hpp
#endif
#else
#error This operating system is not supported by gb.hpp
#endif
#if defined(_MSC_VER)
// Microsoft Visual Studio
#define GB_COMPILER_MSVC 1
#elif defined(__clang__)
// Clang
#define GB_COMPILER_CLANG 1
#elif defined(__GNUC__) || defined(__GNUG__) && !(defined(__clang__) || defined(__INTEL_COMPILER))
// GNU GCC/G++ Compiler
#define GB_COMPILER_GNU_GCC 1
#elif defined(__INTEL_COMPILER)
// Intel C++ Compiler
#define GB_COMPILER_INTEL 1
#endif
////////////////////////////////
// //
// Environment Bit Size //
// //
////////////////////////////////
#if defined(_WIN32) || defined(_WIN64)
#if defined(_WIN64)
#ifndef GB_ARCH_64_BIT
#define GB_ARCH_64_BIT 1
#endif
#else
#ifndef GB_ARCH_32_BIT
#define GB_ARCH_32_BIT 1
#endif
#endif
#endif
// TODO(bill): Check if this works on clang
#if defined(__GNUC__)
#if defined(__x86_64__) || defined(__ppc64__)
#ifndef GB_ARCH_64_BIT
#define GB_ARCH_64_BIT 1
#endif
#else
#ifndef GB_ARCH_32_BIT
#define GB_ARCH_32_BIT 1
#endif
#endif
#endif
#ifndef GB_EDIAN_ORDER
#define GB_EDIAN_ORDER
#define GB_IS_BIG_EDIAN (!*(unsigned char*)&(unsigned short){1})
#define GB_IS_LITTLE_EDIAN (!GB_IS_BIG_EDIAN)
#endif
#define GB_IS_POWER_OF_TWO(x) ((x) != 0) && !((x) & ((x) - 1))
#if !defined(GB_HAS_NO_CONSTEXPR)
#if defined(_GNUC_VER) && _GNUC_VER < 406 // Less than gcc 4.06
#define GB_HAS_NO_CONSTEXPR 1
#elif defined(_MSC_VER) && _MSC_VER < 1900 // Less than Visual Studio 2015/MSVC++ 14.0
#define GB_HAS_NO_CONSTEXPR 1
#elif !defined(__GXX_EXPERIMENTAL_CXX0X__) && __cplusplus < 201103L
#define GB_HAS_NO_CONSTEXPR 1
#endif
#endif
#if defined(GB_HAS_NO_CONSTEXPR)
#define GB_CONSTEXPR
#else
#define GB_CONSTEXPR constexpr
#endif
#ifndef GB_FORCE_INLINE
#if defined(_MSC_VER)
#define GB_FORCE_INLINE __forceinline
#else
#define GB_FORCE_INLINE __attribute__ ((__always_inline__))
#endif
#endif
////////////////////////////////
// //
// Includes //
// //
////////////////////////////////
#include <math.h>
#include <stdio.h>
#if defined(GB_SYSTEM_WINDOWS)
#define NOMINMAX 1
#define VC_EXTRALEAN 1
#define WIN32_EXTRA_LEAN 1
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h> // TODO(bill): Should we include only the needed headers?
#include <mmsystem.h> // Time functions
#undef NOMINMAX
#undef VC_EXTRALEAN
#undef WIN32_EXTRA_LEAN
#undef WIN32_LEAN_AND_MEAN
#include <intrin.h>
#else
#include <pthread.h>
#include <sys/time.h>
#endif
#if !defined(GB_ASSERT)
#if !defined(NDEBUG)
#define GB_ASSERT(x, ...) ((void)(gb__assert_handler((x), #x, __FILE__, __LINE__, ##__VA_ARGS__)))
// Helper function used as a better alternative to assert which allows for
// optional printf style error messages
extern "C" void
gb__assert_handler(bool condition, const char* condition_str,
const char* filename, size_t line,
const char* error_text = nullptr, ...);
#else
#define GB_ASSERT(x, ...) ((void)sizeof(x))
#endif
#endif
////////////////////////////////
// //
// snprintf_msvc //
// //
////////////////////////////////
#if defined(_MSC_VER)
extern "C" inline int
gb__vsnprintf_compatible(char* buffer, size_t size, const char* format, va_list args)
{
int result = -1;
if (size > 0)
result = _vsnprintf_s(buffer, size, _TRUNCATE, format, args);
if (result == -1)
return _vscprintf(format, args);
return result;
}
extern "C" inline int
gb__snprintf_compatible(char* buffer, size_t size, const char* format, ...)
{
va_list args;
va_start(args, format);
int result = gb__vsnprintf_compatible(buffer, size, format, args);
va_end(args);
return result;
}
#if !defined(GB_DO_NOT_USE_MSVC_SPRINTF_FIX)
#define snprintf gb__snprintf_compatible
#define vsnprintf gb__vsnprintf_compatible
#endif // GB_DO_NOT_USE_MSVC_SPRINTF_FIX
#endif
#if defined(GB_NO_GB_NAMESPACE)
#define __GB_NAMESPACE_START
#define __GB_NAMESPACE_END
#define __GB_NAMESPACE_PREFIX
#else
#ifndef __GB_NAMESPACE_PREFIX
#define __GB_NAMESPACE_PREFIX gb
#endif
// NOTE(bill): __GB_NAMESPACE_PREFIX cannot be blank
// This is why macros that not meant to be touched have `__` prefix
// You can change them if you know what you are doing
#define __GB_NAMESPACE_START namespace __GB_NAMESPACE_PREFIX {
#define __GB_NAMESPACE_END } // namespace __GB_NAMESPACE_PREFIX
#endif
#if !defined(GB_BASIC_WITHOUT_NAMESPACE)
__GB_NAMESPACE_START
#endif // GB_BASIC_WITHOUT_NAMESPACE
////////////////////////////////
// //
// Types //
// //
////////////////////////////////
#ifndef GB_BASIC_TYPES
#define GB_BASIC_TYPES
#if defined(_MSC_VER)
using u8 = unsigned __int8;
using s8 = signed __int8;
using u16 = unsigned __int16;
using s16 = signed __int16;
using u32 = unsigned __int32;
using s32 = signed __int32;
using u64 = unsigned __int64;
using s64 = signed __int64;
#else
// NOTE(bill): Of the platforms that I build for, these will be correct
using u8 = unsigned char;
using s8 = signed char;
using u16 = unsigned short;
using s16 = signed short;
using u32 = unsigned int;
using s32 = signed int;
using u64 = unsigned long long;
using s64 = signed long long;
#endif
static_assert( sizeof(u8) == 1, "u8 is not 8 bits");
static_assert(sizeof(u16) == 2, "u16 is not 16 bits");
static_assert(sizeof(u32) == 4, "u32 is not 32 bits");
static_assert(sizeof(u64) == 8, "u64 is not 64 bits");
using f32 = float;
using f64 = double;
#if defined(GB_B8_AS_BOOL)
using bool8 = bool;
#else
using bool8 = s8;
#endif
using bool32 = s32;
// NOTE(bill): (std::)size_t is not used not because it's a bad concept but on
// the platforms that I will be using:
// sizeof(size_t) == sizeof(usize) == sizeof(ssize)
// NOTE(bill): This also allows for a signed version of size_t which is similar
// to ptrdiff_t
// NOTE(bill): If (u)intptr is a better fit, please use that.
// NOTE(bill): Also, I hate the `_t` suffix
#if defined(GB_ARCH_64_BIT)
using ssize = s64;
using usize = u64;
#elif defined(GB_ARCH_32_BIT)
using usize = s32;
using usize = u32;
#else
#error Unknown architecture bit size
#endif
static_assert(sizeof(usize) == sizeof(size_t),
"`usize` is not the same size as `size_t`");
static_assert(sizeof(ssize) == sizeof(usize),
"`ssize` is not the same size as `usize`");
using intptr = intptr_t;
using uintptr = uintptr_t;
using ptrdiff = ptrdiff_t;
#endif
#if !defined(GB_U8_MIN)
#define GB_U8_MIN 0u
#define GB_U8_MAX 0xffu
#define GB_S8_MIN (-0x7f - 1)
#define GB_S8_MAX 0x7f
#define GB_U16_MIN 0u
#define GB_U16_MAX 0xffffu
#define GB_S16_MIN (-0x7fff - 1)
#define GB_S16_MAX 0x7fff
#define GB_U32_MIN 0u
#define GB_U32_MAX 0xffffffffu
#define GB_S32_MIN (-0x7fffffff - 1)
#define GB_S32_MAX 0x7fffffff
#define GB_U64_MIN 0ull
#define GB_U64_MAX 0xffffffffffffffffull
#define GB_S64_MIN (-0x7fffffffffffffffll - 1)
#define GB_S64_MAX 0x7fffffffffffffffll
#endif
#if defined(GB_ARCH_64_BIT) && !defined(GB_USIZE_MIX)
#define GB_USIZE_MIX GB_U64_MIN
#define GB_USIZE_MAX GB_U64_MAX
#define GB_SSIZE_MIX GB_S64_MIN
#define GB_SSIZE_MAX GB_S64_MAX
#elif defined(GB_ARCH_32_BIT) && !defined(GB_USIZE_MIX)
#define GB_USIZE_MIX GB_U32_MIN
#define GB_USIZE_MAX GB_U32_MAX
#define GB_SSIZE_MIX GB_S32_MIN
#define GB_SSIZE_MAX GB_S32_MAX
#endif
#if defined(GB_BASIC_WITHOUT_NAMESPACE) && !defined(U8_MIN)
#define U8_MIN 0u
#define U8_MAX 0xffu
#define S8_MIN (-0x7f - 1)
#define S8_MAX 0x7f
#define U16_MIN 0u
#define U16_MAX 0xffffu
#define S16_MIN (-0x7fff - 1)
#define S16_MAX 0x7fff
#define U32_MIN 0u
#define U32_MAX 0xffffffffu
#define S32_MIN (-0x7fffffff - 1)
#define S32_MAX 0x7fffffff
#define U64_MIN 0ull
#define U64_MAX 0xffffffffffffffffull
#define S64_MIN (-0x7fffffffffffffffll - 1)
#define S64_MAX 0x7fffffffffffffffll
#if defined(GB_ARCH_64_BIT) && !defined(GB_USIZE_MIX)
#define USIZE_MIX U64_MIN
#define USIZE_MAX U64_MAX
#define SSIZE_MIX S64_MIN
#define SSIZE_MAX S64_MAX
#elif defined(GB_ARCH_32_BIT) && !defined(GB_USIZE_MIX)
#define USIZE_MIX U32_MIN
#define USIZE_MAX U32_MAX
#define SSIZE_MIX S32_MIN
#define SSIZE_MAX S32_MAX
#endif
#endif
#if !defined(GB_BASIC_WITHOUT_NAMESPACE)
__GB_NAMESPACE_END
#endif // GB_BASIC_WITHOUT_NAMESPACE
__GB_NAMESPACE_START
////////////////////////////////
// //
// C++11 Types Traits //
// //
////////////////////////////////
template <typename T> struct Add_Const_Def { using Type = const T; };
template <typename T> using Add_Const = typename Add_Const_Def<T>::Type;
template <typename T> struct Add_Volatile_Def { using Type = volatile T; };
template <typename T> using Add_Volatile = typename Add_Volatile_Def<T>::Type;
template <typename T> using Add_Const_Volatile = Add_Const<Add_Volatile<T>>;
template <typename T> struct Add_Lvalue_Reference_Def { using Type = T&; };
template <typename T> struct Add_Lvalue_Reference_Def<T&> { using Type = T&; };
template <typename T> struct Add_Lvalue_Reference_Def<T&&> { using Type = T&; };
template <> struct Add_Lvalue_Reference_Def<void> { using Type = void; };
template <> struct Add_Lvalue_Reference_Def<const void> { using Type = const void; };
template <> struct Add_Lvalue_Reference_Def<volatile void> { using Type = volatile void; };
template <> struct Add_Lvalue_Reference_Def<const volatile void> { using Type = const volatile void; };
template <typename T> using Add_Lvalue_Reference = typename Add_Lvalue_Reference_Def<T>::Type;
template <typename T> struct Add_Rvalue_Reference_Def { using Type = T&&; };
template <typename T> struct Add_Rvalue_Reference_Def<T&> { using Type = T&; };
template <typename T> struct Add_Rvalue_Reference_Def<T&&> { using Type = T&&; };
template <> struct Add_Rvalue_Reference_Def<void> { using Type = void; };
template <> struct Add_Rvalue_Reference_Def<const void> { using Type = const void; };
template <> struct Add_Rvalue_Reference_Def<volatile void> { using Type = volatile void; };
template <> struct Add_Rvalue_Reference_Def<const volatile void> { using Type = const volatile void; };
template <typename T> using Add_Rvalue_Reference = typename Add_Rvalue_Reference_Def<T>::Type;
template <typename T> struct Remove_Pointer_Def { using Type = T; };
template <typename T> struct Remove_Pointer_Def<T*> { using Type = T; };
template <typename T> struct Remove_Pointer_Def<T* const> { using Type = T; };
template <typename T> struct Remove_Pointer_Def<T* volatile> { using Type = T; };
template <typename T> struct Remove_Pointer_Def<T* const volatile> { using Type = T; };
template <typename T> using Remove_Pointer = typename Remove_Pointer_Def<T>::Type;
template <typename T> struct Add_Pointer_Def { using Type = T*; };
template <typename T> using Add_Pointer = typename Add_Pointer_Def<T>::Type;
template <typename T> struct Remove_Const_Def { using Type = T; };
template <typename T> struct Remove_Const_Def<const T> { using Type = T; };
template <typename T> using Remove_Const = typename Remove_Const_Def<T>::Type;
template <typename T> struct Remove_Volatile_Def { using Type = T; };
template <typename T> struct Remove_Volatile_Def<volatile T> { using Type = T; };
template <typename T> using Remove_Volatile = typename Remove_Const_Def<T>::Type;
template <typename T> using Remove_Const_Volatile = Remove_Const<Remove_Volatile<T>>;
template <typename T> struct Remove_Reference_Def { using Type = T; };
template <typename T> struct Remove_Reference_Def<T&> { using Type = T; };
template <typename T> struct Remove_Reference_Def<T&&> { using Type = T; };
template <typename T> using Remove_Reference = typename Remove_Reference_Def<T>::Type;
template <typename T, T v> struct Integral_Constant { global_variable const T VALUE = v; using Value_Type = T; using Type = Integral_Constant; };
template <typename T, usize N = 0> struct Extent : Integral_Constant<usize, 0> {};
template <typename T> struct Extent<T[], 0> : Integral_Constant<usize, 0> {};
template <typename T, usize N> struct Extent<T[], N> : Integral_Constant<usize, Extent<T, N-1>::VALUE> {};
template <typename T, usize N> struct Extent<T[N], 0> : Integral_Constant<usize, N> {};
template <typename T, usize I, usize N> struct Extent<T[I], N> : Integral_Constant<usize, Extent<T, N-1>::VALUE> {};
template <typename T> struct Remove_Extent_Def { using Type = T; };
template <typename T> struct Remove_Extent_Def<T[]> { using Type = T; };
template <typename T, usize N> struct Remove_Extent_Def<T[N]> { using Type = T; };
// TODO(bill): Do I "need" all of these template traits?
////////////////////////////////
// //
// C++11 Move Semantics //
// //
////////////////////////////////
// TODO(bill): Are these decent names? Are `forward` and `move` clear enough?
template <typename T>
inline T&&
forward(Remove_Reference<T>& t)
{
return static_cast<T&&>(t);
}
template <typename T>
inline T&&
forward(Remove_Reference<T>&& t)
{
return static_cast<T&&>(t);
}
template <typename T>
inline Remove_Reference<T>&&
move(T&& t)
{
return static_cast<Remove_Reference<T>&&>(t);
}
__GB_NAMESPACE_END
////////////////////////////////
// //
// Defer //
// //
////////////////////////////////
#ifndef GB_DEFER
#define GB_DEFER
__GB_NAMESPACE_START
namespace impl
{
template <typename Func>
struct Defer
{
Func f;
Defer(Func&& f) : f{forward<Func>(f)} {}
~Defer() { f(); };
};
template <typename Func>
inline Defer<Func>
defer_func(Func&& f) { return Defer<Func>(forward<Func>(f)); }
} // namespace impl
__GB_NAMESPACE_END
// NOTE(bill): These macros are in the global namespace thus, defer can be treated without a __GB_NAMESPACE_PREFIX:: prefix
#define GB_DEFER_1(x, y) x##y
#define GB_DEFER_2(x, y) GB_DEFER_1(x, y)
#define GB_DEFER_3(x) GB_DEFER_2(GB_DEFER_2(GB_DEFER_2(x, __COUNTER__), _), __LINE__)
#define defer(code) auto GB_DEFER_3(_defer_) = __GB_NAMESPACE_PREFIX::impl::defer_func([&](){code;})
/* EXAMPLES
// `defer (...)` will defer a statement till the end of scope
FILE* file = fopen("test.txt", "rb");
if (file == nullptr)
{
// Handle Error
}
defer (fclose(file)); // Will always be called at the end of scope
//
auto m = mutex::make();
defer (mutex::destroy(&m)); // Mutex will be destroyed at the end of scope
{
mutex::lock(&m);
defer (mutex::unlock(&m)); // Mutex will unlock at end of scope
// Do whatever
}
// You can scope multiple statements together if needed with {...}
defer ({
func1();
func2();
func3();
});
*/
#endif
#if !defined(GB_CASTS_WITHOUT_NAMESPACE)
__GB_NAMESPACE_START
#endif // GB_CASTS_WITHOUT_NAMESPACE
#ifndef GB_SPECIAL_CASTS
#define GB_SPECIAL_CASTS
// NOTE(bill): Very similar to doing `*(T*)(&u)`
template <typename Dest, typename Source>
inline Dest
bit_cast(const Source& source)
{
static_assert(sizeof(Dest) <= sizeof(Source),
"bit_cast<Dest>(const Source&) - sizeof(Dest) <= sizeof(Source)");
Dest dest;
::memcpy(&dest, &source, sizeof(Dest));
return dest;
}
// IMPORTANT NOTE(bill): Very similar to doing `*(T*)(&u)` but easier/clearer to write
// however, it can be dangerous if sizeof(T) > sizeof(U) e.g. unintialized memory, undefined behavior
// *(T*)(&u) ~~ pseudo_cast<T>(u)
template <typename T, typename U>
inline T
pseudo_cast(const U& u)
{
return reinterpret_cast<const T&>(u);
}
/*
EXAMPLES:
// bit_cast
u8 arr[4] = {0x78, 0x56, 0x34, 0x12};
u32 var = bit_cast<u32>(arr); // Little edian => 0x12345678
// pseudo_cast - except from gb_math.hpp
Sphere
calculate_min_bounding(const void* vertices, usize num_vertices, usize stride, usize offset, f32 step)
{
auto gen = random::make(0);
const u8* vertex = reinterpret_cast<const u8*>(vertices);
vertex += offset;
Vector3 position = pseudo_cast<Vector3>(vertex[0]);
Vector3 center = position;
center += pseudo_cast<Vector3>(vertex[1 * stride]);
center *= 0.5f;
Vector3 d = position - center;
f32 max_dist_sq = math::dot(d, d);
f32 radius_step = step * 0.37f;
bool done;
do
{
done = true;
for (u32 i = 0, index = random::uniform_u32(&gen, 0, num_vertices-1);
i < num_vertices;
i++, index = (index + 1)%num_vertices)
{
Vector3 position = pseudo_cast<Vector3>(vertex[index * stride]);
d = position - center;
f32 dist_sq = math::dot(d, d);
if (dist_sq > max_dist_sq)
{
done = false;
center = d * radius_step;
max_dist_sq = math::lerp(max_dist_sq, dist_sq, step);
break;
}
}
}
while (!done);
Sphere result;
result.center = center;
result.radius = math::sqrt(max_dist_sq);
return result;
}
*/
#endif
// FORENOTE(bill): There used to be a magic_cast that was equivalent to
// a C-style cast but I removed it as I could not get it work as intented
// for everything using only C++ style casts (it needed to a c-style cast)
#if !defined(GB_CASTS_WITHOUT_NAMESPACE)
__GB_NAMESPACE_END
#endif // GB_CASTS_WITHOUT_NAMESPACE
__GB_NAMESPACE_START
////////////////////////////////
// //
// Memory //
// //
////////////////////////////////
template <typename T, usize N>
inline usize array_count(const T(& )[N]) { return N; }
inline s64 kilobytes(s64 x) { return (x) * 1024ll; }
inline s64 megabytes(s64 x) { return kilobytes(x) * 1024ll; }
inline s64 gigabytes(s64 x) { return megabytes(x) * 1024ll; }
inline s64 terabytes(s64 x) { return gigabytes(x) * 1024ll; }
struct Mutex
{
#if defined(GB_SYSTEM_WINDOWS)
HANDLE win32_mutex;
#else
pthread_mutex_t posix_mutex;
#endif
};
namespace mutex
{
Mutex make();
void destroy(Mutex* mutex);
void lock(Mutex* mutex);
bool try_lock(Mutex* mutex);
void unlock(Mutex* mutex);
} // namespace mutex
// Atomic Types
struct Atomic32 { u32 nonatomic; };
struct Atomic64 { u64 nonatomic; };
namespace atomic
{
u32 load(const volatile Atomic32* object);
void store(volatile Atomic32* object, u32 value);
u32 compare_exchange_strong(volatile Atomic32* object, u32 expected, u32 desired);
u32 exchanged(volatile Atomic32* object, u32 desired);
u32 fetch_add(volatile Atomic32* object, s32 operand);
u32 fetch_and(volatile Atomic32* object, u32 operand);
u32 fetch_or(volatile Atomic32* object, u32 operand);
u64 load(const volatile Atomic64* object);
void store(volatile Atomic64* object, u64 value);
u64 compare_exchange_strong(volatile Atomic64* object, u64 expected, u64 desired);
u64 exchanged(volatile Atomic64* object, u64 desired);
u64 fetch_add(volatile Atomic64* object, s64 operand);
u64 fetch_and(volatile Atomic64* object, u64 operand);
u64 fetch_or(volatile Atomic64* object, u64 operand);
} // namespace atomic
struct Semaphore
{
#if defined(GB_SYSTEM_WINDOWS)
HANDLE win32_handle;
#else
Mutex mutex;
pthread_cond_t cond;
s32 count;
#endif
};
namespace semaphore
{
Semaphore make();
void destroy(Semaphore* semaphore);
void post(Semaphore* semaphore, u32 count = 1);
void wait(Semaphore* semaphore);
} // namespace semaphore
// TODO(bill): Is this thread procedure definition good enough?
using Thread_Procedure = void(void*);
struct Thread
{
#if defined(GB_SYSTEM_WINDOWS)
HANDLE win32_handle;
#else
pthread_t posix_handle;
#endif
Thread_Procedure* function;
void* data;
Semaphore semaphore;
usize stack_size;
bool32 is_running;
};
namespace thread
{
Thread make();
void destroy(Thread* t);
void start(Thread* t, Thread_Procedure* func, void* data = nullptr, usize stack_size = 0);
void join(Thread* t);
bool is_running(const Thread& t);
u32 current_id();
} // namespace thread
// Default alignment for memory allocations
#ifndef GB_DEFAULT_ALIGNMENT
#define GB_DEFAULT_ALIGNMENT 8
#endif
// Base class for memory allocators - Pretty much a vtable
struct Allocator
{
// Allocates the specified amount of memory aligned to the specified alignment
void* (*alloc)(Allocator* a, usize size, usize align);
// Frees an allocation made with alloc()
void (*free)(Allocator* a, void* ptr);
// Returns the amount of usuable memory allocated at `ptr`.
///
// If the allocator does not support tracking of the allocation size,
// the function will return -1
s64 (*allocated_size)(Allocator* a, const void* ptr);
// Returns the total amount of memory allocated by this allocator
///
// If the allocator does not track memory, the function will return -1
s64 (*total_allocated)(Allocator* a);
};
struct Heap : Allocator
{
struct Header
{
usize size;
};
Mutex mutex;
bool32 use_mutex;
s64 total_allocated_count;
s64 allocation_count;
#if defined(GB_SYSTEM_WINDOWS)
HANDLE win32_heap_handle;
#endif
};
namespace heap
{
Heap make(bool use_mutex = true);
void destroy(Heap* heap);
} // namespace heap
struct Arena : Allocator
{
Allocator* backing;
void* physical_start;
s64 total_size;
s64 total_allocated_count;
s64 temp_count;
};
namespace arena
{
Arena make(Allocator* backing, usize size);
Arena make(void* start, usize size);
void destroy(Arena* arena);
void clear(Arena* arena);
} // namespace arena
struct Temporary_Arena_Memory
{
Arena* arena;
s64 original_count;
};
namespace temporary_arena_memory
{
Temporary_Arena_Memory make(Arena* arena);
void free(Temporary_Arena_Memory* tmp);
} // namespace temporary_arena_memory
struct Pool : Allocator
{
Allocator* backing;
void* physical_start;
void* free_list;
usize block_size;
usize block_align;
s64 total_size;
};
namespace pool
{
Pool make(Allocator* backing, usize num_blocks, usize block_size,
usize block_align = GB_DEFAULT_ALIGNMENT);
void destroy(Pool* pool);
} // namespace pool
namespace memory
{
void* align_forward(void* ptr, usize align);
void* pointer_add(void* ptr, usize bytes);
void* pointer_sub(void* ptr, usize bytes);
const void* pointer_add(const void* ptr, usize bytes);
const void* pointer_sub(const void* ptr, usize bytes);
void* set(void* ptr, usize bytes, u8 value);
void* zero(void* ptr, usize bytes);
void* copy(const void* src, usize bytes, void* dest);
void* move(const void* src, usize bytes, void* dest);
bool equals(const void* a, const void* b, usize bytes);
// TODO(bill): Should this be just zero(T*) ???
template <typename T>
T* zero_struct(T* ptr);
template <typename T>
T* zero_array(T* ptr, usize count);
template <typename T>
T* copy_array(const T* src_array, usize count, T* dest_array);
// TODO(bill): Should I implement something like std::copy, std::fill, std::fill_n ???
template <typename T>
void swap(T* a, T* b);
template <typename T, usize N>
void swap(T (& a)[N], T (& b)[N]);
} // namespace memory
// Allocator Functions
void* alloc(Allocator* a, usize size, usize align = GB_DEFAULT_ALIGNMENT);
void free(Allocator* a, void* ptr);
s64 allocated_size(Allocator* a, const void* ptr);
s64 total_allocated(Allocator* a);
template <typename T>
inline T* alloc_struct(Allocator* a) { return static_cast<T*>(alloc(a, sizeof(T), alignof(T))); }
template <typename T>
inline T* alloc_array(Allocator* a, usize count) { return static_cast<T*>(alloc(a, count * sizeof(T), alignof(T))); }
////////////////////////////////
// //
// String //
// //
// C compatible string //
// //
////////////////////////////////
// A "better" string type that is compatible with C style read-only functions
using String = char*;
namespace string
{
using Size = u32;
struct Header
{
Allocator* allocator;
Size length;
Size capacity;
};
inline Header* header(String str) { return reinterpret_cast<Header*>(str) - 1; }
String make(Allocator* a, const char* str = "");
String make(Allocator* a, const void* str, Size num_bytes);
void free(String str);
String duplicate(Allocator* a, const String str);
Size length(const String str);
Size capacity(const String str);
Size available_space(const String str);
void clear(String str);
void append(String* str, char c);
void append(String* str, const String other);
void append_cstring(String* str, const char* other);
void append(String* str, const void* other, Size num_bytes);
void make_space_for(String* str, Size add_len);
usize allocation_size(const String str);
bool equals(const String lhs, const String rhs);
int compare(const String lhs, const String rhs); // NOTE(bill): three-way comparison
void trim(String* str, const char* cut_set);
void trim_space(String* str);
} // namespace string
// TODO(bill): string libraries
////////////////////////////////
// //
// Array //
// //
////////////////////////////////
#ifndef GB_ARRAY_BOUND_CHECKING
#define GB_ARRAY_BOUND_CHECKING 1
#endif
// Dynamic resizable array for POD types only
template <typename T>
struct Array
{
using Type = T;
Allocator* allocator;
s64 count;
s64 capacity;
T* data;
Array() = default;
explicit Array(Allocator* a, usize count = 0);
~Array();
Array(const Array& array);
Array(Array&& array);
Array& operator=(const Array& array);
Array& operator=(Array&& array);
const T& operator[](usize index) const;
T& operator[](usize index);
};
// TODO(bill): Should I even have ctor, dtor, copy/move overloads for Array<T>?
// Should these be explicit functions e.g.
/*
auto old_array = array::make(...);
auto new_array = array::copy(old_array);
array::free(&old_array);
array::free(&new_array);
*/
namespace array
{
// Helper functions to make and free an array
template <typename T> Array<T> make(Allocator* allocator, usize count = 0);
template <typename T> void free(Array<T>* array);
// Appends `item` to the end of the array
template <typename T> void append(Array<T>* a, const T& item);
template <typename T> void append(Array<T>* a, T&& item);
// Appends `items[count]` to the end of the array
template <typename T> void append(Array<T>* a, const T* items, usize count);
// Pops the last item form the array. The array cannot be empty.
template <typename T> void pop(Array<T>* a);
// Removes all items from the array - does not free memory
template <typename T> void clear(Array<T>* a);
// Modify the size of a array - only reallocates when necessary
template <typename T> void resize(Array<T>* a, usize count);
// Makes sure that the array has at least the specified capacity - or the array the grows
template <typename T> void reserve(Array<T>* a, usize capacity);
// Reallocates the array to the specific capacity
template <typename T> void set_capacity(Array<T>* a, usize capacity);
// Grows the array to keep append() to be O(1)
template <typename T> void grow(Array<T>* a, usize min_capacity = 0);
} // namespace array
// Used to iterate over the array with a C++11 for loop
template <typename T> inline T* begin(Array<T>& a) { return a.data; }
template <typename T> inline const T* begin(const Array<T>& a) { return a.data; }
template <typename T> inline T* end(Array<T>& a) { return a.data + a.count; }
template <typename T> inline const T* end(const Array<T>& a) { return a.data + a.count; }
////////////////////////////////
// //
// Hash Table //
// //
////////////////////////////////
// Hash table for POD types only with a u64 key
template <typename T>
struct Hash_Table
{
using Type = T;
struct Entry
{
u64 key;
s64 next;
T value;
};
Array<s64> hashes;
Array<Entry> entries;
Hash_Table();
explicit Hash_Table(Allocator* a);
Hash_Table(const Hash_Table<T>& other);
Hash_Table(Hash_Table<T>&& other);
~Hash_Table() = default;
Hash_Table<T>& operator=(const Hash_Table<T>& other);
Hash_Table<T>& operator=(Hash_Table<T>&& other);
};
namespace hash_table
{
// Helper function to make a hash table
template <typename T> Hash_Table<T> make(Allocator* a);
// Return `true` if the specified key exist in the hash table
template <typename T> bool has(const Hash_Table<T>& h, u64 key);
// Returns the value stored at the key, or a `default_value` if the key is not found in the hash table
template <typename T> const T& get(const Hash_Table<T>& h, u64 key, const T& default_value);
// Sets the value for the key in the hash table
template <typename T> void set(Hash_Table<T>* h, u64 key, const T& value);
template <typename T> void set(Hash_Table<T>* h, u64 key, T&& value);
// Removes the key from the hash table if it exists
template <typename T> void remove(Hash_Table<T>* h, u64 key);
// Resizes the hash table's lookup table to the specified size
template <typename T> void reserve(Hash_Table<T>* h, usize capacity);
// Remove all elements from the hash table
template <typename T> void clear(Hash_Table<T>* h);
} // namespace hash_table
// Used to iterate over the array with a C++11 for loop - in random order
template <typename T> typename const Hash_Table<T>::Entry* begin(const Hash_Table<T>& h);
template <typename T> typename const Hash_Table<T>::Entry* end(const Hash_Table<T>& h);
namespace multi_hash_table
{
// Outputs all the items that with the specified key
template <typename T> void get(const Hash_Table<T>& h, u64 key, Array<T>& items);
// Returns the count of entries with the specified key
template <typename T> usize count(const Hash_Table<T>& h, u64 key);
// Finds the first entry with specified key in the hash table
template <typename T> typename const Hash_Table<T>::Entry* find_first(const Hash_Table<T>& h, u64 key);
// Finds the next entry with same key as `e`
template <typename T> typename const Hash_Table<T>::Entry* find_next(const Hash_Table<T>& h, typename const Hash_Table<T>::Entry* e);
// Inserts the `value` as an additional value for the specified key
template <typename T> void insert(Hash_Table<T>* h, u64 key, const T& value);
template <typename T> void insert(Hash_Table<T>* h, u64 key, T&& value);
// Removes a specified entry `e` from the hash table
template <typename T> void remove_entry(Hash_Table<T>* h, typename const Hash_Table<T>::Entry* e);
// Removes all entries with from the hash table with the specified key
template <typename T> void remove_all(Hash_Table<T>* h, u64 key);
} // namespace multi_hash_table
////////////////////////////////
// //
// Hash //
// //
////////////////////////////////
namespace hash
{
u32 adler32(const void* key, u32 num_bytes);
u32 crc32(const void* key, u32 num_bytes);
u64 crc64(const void* key, usize num_bytes);
u32 fnv32(const void* key, usize num_bytes);
u64 fnv64(const void* key, usize num_bytes);
u32 fnv32a(const void* key, usize num_bytes);
u64 fnv64a(const void* key, usize num_bytes);
u32 murmur32(const void* key, u32 num_bytes, u32 seed = 0x9747b28c);
u64 murmur64(const void* key, usize num_bytes, u64 seed = 0x9747b28c);
} // namespace hash
////////////////////////////////
// //
// Sort //
// //
////////////////////////////////
namespace sort
{
// Comparison_Function
// NOTE(bill): Similar to str(n)cmp
// a < b --> -1
// a == b --> 0
// a > b --> +1
// Quick Sort (Qsort)
template <typename T, typename Comparison_Function>
void quick(T* array, usize count, Comparison_Function compare);
// TODO(bill): Implement other sorting algorithms
} // namespace sort
////////////////////////////////
// //
// Time //
// //
////////////////////////////////
struct Time
{
s64 microseconds;
};
extern const Time TIME_ZERO;
namespace time
{
Time now();
void sleep(Time time);
Time seconds(f32 s);
Time milliseconds(s32 ms);
Time microseconds(s64 us);
f32 as_seconds(Time t);
s32 as_milliseconds(Time t);
s64 as_microseconds(Time t);
} // namespace time
bool operator==(Time left, Time right);
bool operator!=(Time left, Time right);
bool operator<(Time left, Time right);
bool operator>(Time left, Time right);
bool operator<=(Time left, Time right);
bool operator>=(Time left, Time right);
Time operator+(Time right);
Time operator-(Time right);
Time operator+(Time left, Time right);
Time operator-(Time left, Time right);
Time& operator+=(Time& left, Time right);
Time& operator-=(Time& left, Time right);
Time operator*(Time left, f32 right);
Time operator*(Time left, s64 right);
Time operator*(f32 left, Time right);
Time operator*(s64 left, Time right);
Time& operator*=(Time& left, f32 right);
Time& operator*=(Time& left, s64 right);
Time operator/(Time left, f32 right);
Time operator/(Time left, s64 right);
Time& operator/=(Time& left, f32 right);
Time& operator/=(Time& left, s64 right);
f32 operator/(Time left, Time right);
Time operator%(Time left, Time right);
Time& operator%=(Time& left, Time right);
////////////////////////////////
// //
// OS //
// //
////////////////////////////////
// TODO(bill): Should this be system:: vs os:: ?
namespace os
{
u64 rdtsc();
} // namespace os
////////////////////////////////
// //
// Template Implementations //
// //
////////////////////////////////
////////////////////////////////
// //
// Array //
// //
////////////////////////////////
template <typename T>
inline
Array<T>::Array(Allocator* a, usize count_)
: allocator(a)
, count(0)
, capacity(0)
, data(nullptr)
{
if (count_ > 0)
{
data = alloc_array<T>(a, count_);
if (data)
count = capacity = count_;
}
}
template <typename T>
inline
Array<T>::Array(const Array<T>& other)
: allocator(other.allocator)
, count(0)
, capacity(0)
, data(nullptr)
{
const auto new_count = other.count;
array::set_capacity(this, new_count);
memory::copy_array(other.data, new_count, data);
this->count = new_count;
}
template <typename T>
inline
Array<T>::Array(Array<T>&& other)
: allocator(nullptr)
, count(0)
, capacity(0)
, data(nullptr)
{
*this = move(other);
}
template <typename T>
inline
Array<T>::~Array()
{
if (allocator && capacity > 0)
free(allocator, data);
}
template <typename T>
Array<T>&
Array<T>::operator=(const Array<T>& other)
{
if (allocator == nullptr)
allocator = other.allocator;
const auto new_count = other.count;
array::resize(this, new_count);
memory::copy_array(other.data, new_count, data);
return *this;
}
template <typename T>
Array<T>&
Array<T>::operator=(Array<T>&& other)
{
if (this != &other)
{
if (allocator && capacity > 0)
free(allocator, data);
allocator = other.allocator;
count = other.count;
capacity = other.capacity;
data = other.data;
other.allocator = nullptr;
other.count = 0;
other.capacity = 0;
other.data = nullptr;
}
return *this;
}
template <typename T>
inline const T&
Array<T>::operator[](usize index) const
{
#if GB_ARRAY_BOUND_CHECKING
GB_ASSERT(index < static_cast<usize>(capacity), "Array out of bounds");
#endif
return data[index];
}
template <typename T>
inline T&
Array<T>::operator[](usize index)
{
#if GB_ARRAY_BOUND_CHECKING
GB_ASSERT(index < static_cast<usize>(capacity), "Array out of bounds");
#endif
return data[index];
}
namespace array
{
template <typename T>
inline Array<T>
make(Allocator* allocator, usize count)
{
Array<T> array{allocator};
if (count > 0)
{
array.data = alloc_array<T>(allocator, count);
if (array.data)
array.count = array.capacity = count;
}
return array;
}
template <typename T>
inline void
free(Array<T>* a)
{
if (a->allocator)
free(a->allocator, a->data);
a->count = 0;
a->capacity = 0;
a->data = nullptr;
}
template <typename T>
inline void
append(Array<T>* a, const T& item)
{
if (a->capacity < a->count + 1)
array::grow(a);
a->data[a->count++] = item;
}
template <typename T>
inline void
append(Array<T>* a, T&& item)
{
if (a->capacity < a->count + 1)
array::grow(a);
a->data[a->count++] = move(item);
}
template <typename T>
inline void
append(Array<T>* a, const T* items, usize count)
{
if (a->capacity <= a->count + static_cast<s64>(count))
array::grow(a, a->count + count);
memory::copy_array(items, count, &a->data[a->count]);
a->count += count;
}
template <typename T>
inline void
pop(Array<T>* a)
{
GB_ASSERT(a->count > 0);
a->count--;
}
template <typename T>
inline void
clear(Array<T>* a)
{
a->count = 0;
}
template <typename T>
inline void
resize(Array<T>* a, usize count)
{
if (a->capacity < static_cast<s64>(count))
array::grow(a, count);
a->count = count;
}
template <typename T>
inline void
reserve(Array<T>* a, usize capacity)
{
if (a->capacity < static_cast<s64>(capacity))
array::set_capacity(a, capacity);
}
template <typename T>
inline void
set_capacity(Array<T>* a, usize capacity)
{
if (static_cast<s64>(capacity) == a->capacity)
return;
if (static_cast<s64>(capacity) < a->count)
array::resize(a, capacity);
T* data = nullptr;
if (capacity > 0)
{
data = alloc_array<T>(a->allocator, capacity);
memory::copy_array(a->data, a->count, data);
}
free(a->allocator, a->data);
a->data = data;
a->capacity = capacity;
}
template <typename T>
inline void
grow(Array<T>* a, usize min_capacity)
{
// TODO(bill): Decide on decent growing formula for Array
usize capacity = 2 * a->capacity + 8;
if (capacity < min_capacity)
capacity = min_capacity;
set_capacity(a, capacity);
}
} // namespace array
////////////////////////////////
// //
// Hash Table //
// //
////////////////////////////////
template <typename T>
inline
Hash_Table<T>::Hash_Table()
: hashes()
, entries()
{
}
template <typename T>
inline
Hash_Table<T>::Hash_Table(Allocator* a)
: hashes(a)
, entries(a)
{
}
template <typename T>
inline
Hash_Table<T>::Hash_Table(const Hash_Table<T>& other)
: hashes(other.hashes)
, entries(other.entries)
{
}
template <typename T>
inline
Hash_Table<T>::Hash_Table(Hash_Table<T>&& other)
: hashes(move(other.hashes))
, entries(move(other.entries))
{
}
template <typename T>
inline Hash_Table<T>&
Hash_Table<T>::operator=(const Hash_Table<T>& other)
{
hashes = other.hashes;
entries = other.entries;
return *this;
}
template <typename T>
inline Hash_Table<T>&
Hash_Table<T>::operator=(Hash_Table<T>&& other)
{
hashes = move(other.hashes);
entries = move(other.entries);
return *this;
}
namespace hash_table
{
template <typename T>
inline Hash_Table<T>
make(Allocator* a)
{
return Hash_Table<T>{a};
}
namespace impl
{
struct Find_Result
{
s64 hash_index;
s64 data_prev;
s64 entry_index;
};
template <typename T> usize add_entry(Hash_Table<T>* h, u64 key);
template <typename T> void erase(Hash_Table<T>* h, const Find_Result& fr);
template <typename T> Find_Result find_result_from_key(const Hash_Table<T>& h, u64 key);
template <typename T> Find_Result find_result_from_entry(const Hash_Table<T>& h, typename const Hash_Table<T>::Entry* e);
template <typename T> s64 make_entry(Hash_Table<T>* h, u64 key);
template <typename T> void find_and_erase_entry(Hash_Table<T>* h, u64 key);
template <typename T> s64 find_entry_or_fail(const Hash_Table<T>& h, u64 key);
template <typename T> s64 find_or_make_entry(Hash_Table<T>* h, u64 key);
template <typename T> void rehash(Hash_Table<T>* h, usize new_capacity);
template <typename T> void grow(Hash_Table<T>* h);
template <typename T> bool is_full(Hash_Table<T>* h);
template <typename T>
usize
add_entry(Hash_Table<T>* h, u64 key)
{
typename Hash_Table<T>::Entry e = {};
e.key = key;
e.next = -1;
usize e_index = h->entries.count;
array::append(&h->entries, e);
return e_index;
}
template <typename T>
void
erase(Hash_Table<T>* h, const Find_Result& fr)
{
if (fr.data_prev < 0)
h->hashes[fr.hash_index] = h->entries[fr.entry_index].next;
else
h->entries[fr.data_prev].next = h->entries[fr.entry_index].next;
array::pop(&h->entries); // Update array count
if (fr.entry_index == h->entries.count)
return;
h->entries[fr.entry_index] = h->entries[h->entries.count];
auto last = impl::find_result_from_key(*h, h->entries[fr.entry_index].key);
if (last.data_prev < 0)
h->hashes[last.hash_index] = fr.entry_index;
else
h->entries[last.entry_index].next = fr.entry_index;
}
template <typename T>
Find_Result
find_result_from_key(const Hash_Table<T>& h, u64 key)
{
Find_Result fr = {};
fr.hash_index = -1;
fr.data_prev = -1;
fr.entry_index = -1;
if (h.hashes.count == 0)
return fr;
fr.hash_index = key % h.hashes.count;
fr.entry_index = h.hashes[fr.hash_index];
while (fr.entry_index >= 0)
{
if (h.entries[fr.entry_index].key == key)
return fr;
fr.data_prev = fr.entry_index;
fr.entry_index = h.entries[fr.entry_index].next;
}
return fr;
}
template <typename T>
Find_Result
find_result_from_entry(const Hash_Table<T>& h, typename const Hash_Table<T>::Entry* e)
{
Find_Result fr = {};
fr.hash_index = -1;
fr.data_prev = -1;
fr.entry_index = -1;
if (h.hashes.count == 0 || !e)
return fr;
fr.hash_index = e->key % h.hashes.count;
fr.entry_index = h.hashes[fr.hash_index];
while (fr.entry_index >= 0)
{
if (&h.entries[fr.entry_index] == e)
return fr;
fr.data_prev = fr.entry_index;
fr.entry_index = h.entries[fr.entry_index].next;
}
return fr;
}
template <typename T>
s64
make_entry(Hash_Table<T>* h, u64 key)
{
const Find_Result fr = impl::find_result_from_key(*h, key);
const s64 index = impl::add_entry(h, key);
if (fr.data_prev < 0)
h->hashes[fr.hash_index] = index;
else
h->entries[fr.data_prev].next = index;
h->entries[index].next = fr.entry_index;
return index;
}
template <typename T>
void
find_and_erase_entry(Hash_Table<T>* h, u64 key)
{
const Find_Result fr = impl::find_result_from_key(*h, key);
if (fr.entry_index >= 0)
impl::erase(h, fr);
}
template <typename T>
s64
find_entry_or_fail(const Hash_Table<T>& h, u64 key)
{
return impl::find_result_from_key(h, key).entry_index;
}
template <typename T>
s64
find_or_make_entry(Hash_Table<T>* h, u64 key)
{
const auto fr = impl::find_result_from_key(*h, key);
if (fr.entry_index >= 0)
return fr.entry_index;
s64 index = impl::add_entry(h, key);
if (fr.data_prev < 0)
h->hashes[fr.hash_index] = index;
else
h->entries[fr.data_prev].next = index;
return index;
}
template <typename T>
void
rehash(Hash_Table<T>* h, usize new_capacity)
{
auto nh = hash_table::make<T>(h->hashes.allocator);
array::resize(&nh.hashes, new_capacity);
array::reserve(&nh.entries, h->entries.count);
for (usize i = 0; i < new_capacity; i++)
nh.hashes[i] = -1;
for (u32 i = 0; i < h->entries.count; i++)
{
const auto* e = &h->entries[i];
multi_hash_table::insert(&nh, e->key, e->value);
}
Hash_Table<T> empty_ht{h->hashes.allocator};
h->~Hash_Table<T>();
memory::copy_array(&nh, 1, h);
memory::copy_array(&empty_ht, 1, &nh);
}
template <typename T>
void
grow(Hash_Table<T>* h)
{
const usize new_capacity = 2 * h->entries.count + 8;
impl::rehash(h, new_capacity);
}
template <typename T>
bool
is_full(Hash_Table<T>* h)
{
// Make sure that there is enough space
const f32 maximum_load_coefficient = 0.75f;
return h->entries.count >= maximum_load_coefficient * h->hashes.count;
}
} // namespace impl
template <typename T>
inline bool
has(const Hash_Table<T>& h, u64 key)
{
return impl::find_entry_or_fail(h, key) >= 0;
}
template <typename T>
inline const T&
get(const Hash_Table<T>& h, u64 key, const T& default_value)
{
const s64 index = impl::find_entry_or_fail(h, key);
if (index < 0)
return default_value;
return h.entries[index].value;
}
template <typename T>
inline void
set(Hash_Table<T>* h, u64 key, const T& value)
{
if (h->hashes.count == 0)
impl::grow(h);
const s64 index = impl::find_or_make_entry(h, key);
h->entries[index].value = value;
if (impl::is_full(h))
impl::grow(h);
}
template <typename T>
inline void
set(Hash_Table<T>* h, u64 key, T&& value)
{
if (h->hashes.count == 0)
impl::grow(h);
const s64 index = impl::find_or_make_entry(h, key);
h->entries[index].value = move(value);
if (impl::is_full(h))
impl::grow(h);
}
template <typename T>
inline void
remove(Hash_Table<T>* h, u64 key)
{
impl::find_and_erase_entry(h, key);
}
template <typename T>
inline void
reserve(Hash_Table<T>* h, usize capacity)
{
impl::rehash(h, capacity);
}
template <typename T>
inline void
clear(Hash_Table<T>* h)
{
array::clear(&h->hashes);
array::clear(&h->entries);
}
} // namespace hash_table
template <typename T>
inline typename const Hash_Table<T>::Entry*
begin(const Hash_Table<T>& h)
{
return begin(h.entries);
}
template <typename T>
inline typename const Hash_Table<T>::Entry*
end(const Hash_Table<T>& h)
{
return end(h.entries);
}
namespace multi_hash_table
{
template <typename T>
inline void
get(const Hash_Table<T>& h, u64 key, Array<T>& items)
{
auto e = multi_hash_table::find_first(h, key);
while (e)
{
array::append(items, e->value);
e = multi_hash_table::find_next(h, e);
}
}
template <typename T>
inline usize
count(const Hash_Table<T>& h, u64 key)
{
usize count = 0;
auto e = multi_hash_table::find_first(h, key);
while (e)
{
count++;
e = multi_hash_table::find_next(h, e);
}
return count;
}
template <typename T>
inline typename const Hash_Table<T>::Entry*
find_first(const Hash_Table<T>& h, u64 key)
{
const s64 index = hash_table::impl::find_entry_or_fail(h, key);
if (index < 0)
return nullptr;
return &h.entries[index];
}
template <typename T>
typename const Hash_Table<T>::Entry*
find_next(const Hash_Table<T>& h, typename const Hash_Table<T>::Entry* e)
{
if (!e)
return nullptr;
auto index = e->next;
while (index >= 0)
{
if (h.entries[index].key == e->key)
return &h.entries[index];
index = h.entries[index].next;
}
return nullptr;
}
template <typename T>
inline void
insert(Hash_Table<T>* h, u64 key, const T& value)
{
if (h->hashes.count == 0)
hash_table::impl::grow(h);
auto next = hash_table::impl::make_entry(h, key);
h->entries[next].value = value;
if (hash_table::impl::is_full(h))
hash_table::impl::grow(h);
}
template <typename T>
inline void
insert(Hash_Table<T>* h, u64 key, T&& value)
{
if (h->hashes.count == 0)
hash_table::impl::grow(h);
auto next = hash_table::impl::make_entry(h, key);
h->entries[next].value = move(value);
if (hash_table::impl::is_full(h))
hash_table::impl::grow(h);
}
template <typename T>
inline void
remove_entry(Hash_Table<T>* h, typename const Hash_Table<T>::Entry* e)
{
const auto fr = hash_table::impl::find_result_from_entry(*h, e);
if (fr.entry_index >= 0)
hash_table::impl::erase(h, fr);
}
template <typename T>
inline void
remove_all(Hash_Table<T>* h, u64 key)
{
while (hash_table::has(*h, key))
hash_table::remove(h, key);
}
} // namespace multi_hash_table
namespace memory
{
template <typename T>
inline T*
zero_struct(T* ptr)
{
return static_cast<T*>(memory::zero(ptr, sizeof(T)));
}
template <typename T>
inline T*
zero_array(T* ptr, usize count)
{
return static_cast<T*>(memory::zero(ptr, count * sizeof(T)));
}
template <typename T>
inline T*
copy_array(const T* src_array, usize count, T* dest_array)
{
return static_cast<T*>(memory::copy(src_array, count * sizeof(T), dest_array));
}
template <typename T>
inline void
swap(T* a, T* b)
{
T c = __GB_NAMESPACE_PREFIX::move(*a);
*a = __GB_NAMESPACE_PREFIX::move(*b);
*b = __GB_NAMESPACE_PREFIX::move(c);
}
template <typename T, usize N>
inline void
swap(T (& a)[N], T (& b)[N])
{
for (usize i = 0; i < N; i++)
math::swap(&a[i], &b[i]);
}
} // namespace memory
////////////////////////////////
// //
// Sort //
// //
////////////////////////////////
namespace sort
{
template <typename T, typename Comparison_Function>
void
quick(T* array, usize count, Comparison_Function compare)
{
if (count < 2) return;
const T& mid = array[count/2];
s64 i = 0;
s64 j = count-1;
while (true)
{
while (compare(array[i], mid) < 0) i++;
while (compare(mid, array[j]) < 0) j--;
if (i >= j) break;
memory::swap(&array[i], &array[j]);
i++;
j--;
}
quick(array, i, compare);
quick(array+i, count-i, compare);
}
} // namespace sort
__GB_NAMESPACE_END
#endif // GB_INCLUDE_GB_HPP
//
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//
// It's turtles all the way down!
//
//
//
//
//
////////////////////////////////
// //
// Implemenation //
// //
////////////////////////////////
#if defined(GB_IMPLEMENTATION)
__GB_NAMESPACE_START
#if defined(GB_SYSTEM_WINDOWS)
#include <dbghelp.h>
#pragma comment(lib, "dbghelp.lib") // TODO(bill): Should this be pragma included or not?
internal_linkage void
gb__print_call_stack(FILE* out_stream)
{
SymInitialize(GetCurrentProcess(), nullptr, true);
SymSetOptions(SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
DWORD mtype = {};
CONTEXT ctx = {};
ctx.ContextFlags = CONTEXT_CONTROL;
RtlCaptureContext(&ctx);
STACKFRAME64 stack = {};
#if defined(_M_IX86)
mtype = IMAGE_FILE_MACHINE_I386;
stack.AddrPC.Offset = ctx.Eip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrFrame.Offset = ctx.Ebp;
stack.AddrFrame.Mode = AddrModeFlat;
stack.AddrStack.Offset = ctx.Esp;
stack.AddrStack.Mode = AddrModeFlat;
#elif defined(_M_X64)
mtype = IMAGE_FILE_MACHINE_AMD64;
stack.AddrPC.Offset = ctx.Rip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrFrame.Offset = ctx.Rsp;
stack.AddrFrame.Mode = AddrModeFlat;
stack.AddrStack.Offset = ctx.Rsp;
stack.AddrStack.Mode = AddrModeFlat;
#else
#error Unknown Windows Platform
#endif
DWORD ldsp = 0;
IMAGEHLP_LINE64 line = {};
line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
char buf[sizeof(SYMBOL_INFO) + (MAX_SYM_NAME * sizeof(TCHAR))];
SYMBOL_INFO* sym = reinterpret_cast<SYMBOL_INFO*>(buf);
sym->SizeOfStruct = sizeof(SYMBOL_INFO);
sym->MaxNameLen = MAX_SYM_NAME;
UINT layer_count = 0;
while (StackWalk64(mtype,
GetCurrentProcess(), GetCurrentThread(),
&stack, &ctx, nullptr,
SymFunctionTableAccess64, SymGetModuleBase64, nullptr))
{
if (stack.AddrPC.Offset == 0)
break;
BOOL result = SymGetLineFromAddr64(GetCurrentProcess(), stack.AddrPC.Offset, &ldsp, &line);
result = result && SymFromAddr(GetCurrentProcess(), stack.AddrPC.Offset, 0, sym);
if (result)
{
fprintf(out_stream,
"\t[%u] `%s` (%s:%d)\n",
layer_count, sym->Name, line.FileName, line.LineNumber);
}
else
{
fprintf(out_stream,
"\t[%u] 0x%p\n",
layer_count, stack.AddrPC.Offset);
}
layer_count++;
}
SymCleanup(GetCurrentProcess());
}
#else
#error gb__print_call_stack() not implemeneted
// TODO(bill): Implemenet gb__print_call_stack()
#endif
// Helper function used as a better alternative to assert which allows for
// optional printf style error messages
inline void
gb__assert_handler(bool condition, const char* condition_str,
const char* filename, size_t line,
const char* error_text, ...)
{
if (condition)
return;
FILE* out_stream = stderr;
fprintf(out_stream, "ASSERT! %s(%lu): %s", filename, line, condition_str);
if (error_text)
{
fprintf(out_stream, " - ");
va_list args;
va_start(args, error_text);
vfprintf(out_stream, error_text, args);
va_end(args);
}
fprintf(out_stream, "\n");
fprintf(out_stream, "Stacktrack:\n");
gb__print_call_stack(out_stream);
// TODO(bill): Are these decent breaking functions???
#if defined(GB_COMPILER_MSVC)
__debugbreak();
#elif defined(GB_COMPILER_GNU_GCC)
__builtin_trap();
#else
#error Implement aborting function
#endif
}
////////////////////////////////
// //
// Memory //
// //
////////////////////////////////
namespace mutex
{
inline Mutex
make()
{
Mutex m = {};
#if defined(GB_SYSTEM_WINDOWS)
m.win32_mutex = CreateMutex(0, false, 0);
#else
pthread_mutex_init(&m.posix_mutex, nullptr);
#endif
return m;
}
inline void
destroy(Mutex* m)
{
#if defined(GB_SYSTEM_WINDOWS)
CloseHandle(m->win32_mutex);
#else
pthread_mutex_destroy(&m->posix_mutex);
#endif
}
inline void
lock(Mutex* m)
{
#if defined(GB_SYSTEM_WINDOWS)
WaitForSingleObject(m->win32_mutex, INFINITE);
#else
pthread_mutex_lock(&m->posix_mutex);
#endif
}
inline bool
try_lock(Mutex* m)
{
#if defined(GB_SYSTEM_WINDOWS)
return WaitForSingleObject(m->win32_mutex, 0) == WAIT_OBJECT_0;
#else
return pthread_mutex_trylock(&m->posix_mutex) == 0;
#endif
}
inline void
unlock(Mutex* m)
{
#if defined(GB_SYSTEM_WINDOWS)
ReleaseMutex(m->win32_mutex);
#else
pthread_mutex_unlock(&m->posix_mutex);
#endif
}
} // namespace mutex
// Atomics
namespace atomic
{
#if defined(_MSC_VER)
inline u32
load(const volatile Atomic32* object)
{
return object->nonatomic;
}
inline void
store(volatile Atomic32* object, u32 value)
{
object->nonatomic = value;
}
inline u32
compare_exchange_strong(volatile Atomic32* object, u32 expected, u32 desired)
{
return _InterlockedCompareExchange(reinterpret_cast<volatile long*>(object), desired, expected);
}
inline u32
exchanged(volatile Atomic32* object, u32 desired)
{
return _InterlockedExchange(reinterpret_cast<volatile long*>(object), desired);
}
inline u32
fetch_add(volatile Atomic32* object, s32 operand)
{
return _InterlockedExchangeAdd(reinterpret_cast<volatile long*>(object), operand);
}
inline u32
fetch_and(volatile Atomic32* object, u32 operand)
{
return _InterlockedAnd(reinterpret_cast<volatile long*>(object), operand);
}
inline u32
fetch_or_32(volatile Atomic32* object, u32 operand)
{
return _InterlockedOr(reinterpret_cast<volatile long*>(object), operand);
}
inline u64
load(const volatile Atomic64* object)
{
#if defined(GB_ARCH_64_BIT)
return object->nonatomic;
#else
// NOTE(bill): The most compatible way to get an atomic 64-bit load on x86 is with cmpxchg8b
u64 result;
__asm
{
mov esi, object;
mov ebx, eax;
mov ecx, edx;
lock cmpxchg8b [esi];
mov dword ptr result, eax;
mov dword ptr result[4], edx;
}
return result;
#endif
}
inline void
store(volatile Atomic64* object, u64 value)
{
#if defined(GB_ARCH_64_BIT)
object->nonatomic = value;
#else
// NOTE(bill): The most compatible way to get an atomic 64-bit store on x86 is with cmpxchg8b
__asm
{
mov esi, object;
mov ebx, dword ptr value;
mov ecx, dword ptr value[4];
retry:
cmpxchg8b [esi];
jne retry;
}
#endif
}
inline u64
compare_exchange_strong(volatile Atomic64* object, u64 expected, u64 desired)
{
_InterlockedCompareExchange64(reinterpret_cast<volatile s64*>(object), desired, expected);
}
inline u64
exchanged(volatile Atomic64* object, u64 desired)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedExchange64(reinterpret_cast<volatile s64*>(object), desired);
#else
u64 expected = object->nonatomic;
while (true)
{
u64 original = _InterlockedCompareExchange64(reinterpret_cast<volatile s64*>(object), desired, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
inline u64
fetch_add(volatile Atomic64* object, s64 operand)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedExchangeAdd64(reinterpret_cast<volatile s64*>(object), operand);
#else
u64 expected = object->nonatomic;
while (true)
{
u64 original = _InterlockedExchange64(reinterpret_cast<volatile s64*>(object), expected + operand, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
inline u64
fetch_and(volatile Atomic64* object, u64 operand)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedAnd64(reinterpret_cast<volatile s64*>(object), operand);
#else
u64 expected = object->nonatomic;
while (true)
{
u64 original = _InterlockedCompareExchange64(reinterpret_cast<volatile s64*>(object), expected & operand, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
inline u64
fetch_or(volatile Atomic64* object, u64 operand)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedAnd64(reinterpret_cast<volatile s64*>(object), operand);
#else
u64 expected = object->nonatomic;
while (true)
{
u64 original = _InterlockedCompareExchange64(reinterpret_cast<volatile s64*>(object), expected | operand, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
#else
#error TODO(bill): Implement atomics for this platform
#endif
} // namespace atomic
namespace semaphore
{
Semaphore
make()
{
Semaphore semaphore = {};
#if defined(GB_SYSTEM_WINDOWS)
semaphore.win32_handle = CreateSemaphore(nullptr, 0, GB_S32_MAX, nullptr);
GB_ASSERT(semaphore.win32_handle != nullptr, "CreateSemaphore: GetLastError = %d", GetLastError());
#else
semaphore.count = 0;
s32 result = pthread_cond_init(&semaphore.cond, nullptr);
GB_ASSERT(result == 0, "pthread_cond_init: errno = %d", result);
semaphore.mutex = mutex::make();
#endif
return semaphore;
}
void
destroy(Semaphore* semaphore)
{
#if defined(GB_SYSTEM_WINDOWS)
BOOL err = CloseHandle(semaphore->win32_handle);
GB_ASSERT(err != 0, "CloseHandle: GetLastError = %d", GetLastError());
#else
s32 result = pthread_cond_destroy(&semaphore->cond);
GB_ASSERT(result == 0, "pthread_cond_destroy: errno = %d", result);
mutex::destroy(&semaphore->mutex);
#endif
}
void
post(Semaphore* semaphore, u32 count)
{
#if defined(GB_SYSTEM_WINDOWS)
BOOL err = ReleaseSemaphore(semaphore->win32_handle, count, nullptr);
GB_ASSERT(err != 0, "ReleaseSemaphore: GetLastError = %d", GetLastError());
#else
mutex::lock(semaphore->mutex);
for (u32 i = 0; i < count; i++)
{
s32 result = pthread_cond_signal(&semaphore->cond);
GB_ASSERT(result == 0, "pthread_cond_signal: errno = %d", result);
}
semaphore->count += count;
mutex::unlock(semaphore->mutex);
#endif
}
void
wait(Semaphore* semaphore)
{
#if defined(GB_SYSTEM_WINDOWS)
DWORD result = WaitForSingleObject(semaphore->win32_handle, INFINITE);
GB_ASSERT(result == WAIT_OBJECT_0, "WaitForSingleObject: GetLastError = %d", GetLastError());
#else
mutex::lock(semaphore->mutex);
while (count <= 0)
{
s32 result = pthread_cond_wait(&semaphore->cond, &semaphore->mutex.posix_mutex);
GB_ASSERT(result == 0, "pthread_cond_wait: errno = %d", result);
}
count--;
mutex::unlock(semaphore->mutex);
#endif
}
} // namespace semaphore
namespace thread
{
Thread
make()
{
Thread t = {};
#if defined(GB_SYSTEM_WINDOWS)
t.win32_handle = INVALID_HANDLE_VALUE;
#else
t.posix_handle = 0;
#endif
t.function = nullptr;
t.data = nullptr;
t.stack_size = 0;
t.is_running = false;
t.semaphore = semaphore::make();
return t;
}
void
destroy(Thread* t)
{
if (t->is_running)
thread::join(t);
semaphore::destroy(&t->semaphore);
}
internal_linkage void
run(Thread* t)
{
semaphore::post(&t->semaphore);
t->function(t->data);
}
#if defined(GB_SYSTEM_WINDOWS)
internal_linkage DWORD WINAPI
thread_proc(void* arg)
{
thread::run(static_cast<Thread*>(arg));
return 0;
}
#else
internal_linkage void*
thread_proc(void* arg)
{
thread::run(static_cast<Thread*>(arg));
return nullptr;
}
#endif
void
start(Thread* t, Thread_Procedure* func, void* data, usize stack_size)
{
GB_ASSERT(!t->is_running);
GB_ASSERT(func != nullptr);
t->function = func;
t->data = data;
t->stack_size = stack_size;
#if defined(GB_SYSTEM_WINDOWS)
t->win32_handle = CreateThread(nullptr, stack_size, thread_proc, t, 0, nullptr);
GB_ASSERT(t->win32_handle != nullptr,
"CreateThread: GetLastError = %d", GetLastError());
#else
pthread_attr_t attr;
s32 result = pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
GB_ASSERT(result == 0, "pthread_attr_init: errno = %d", result);
if (t->stack_size != 0)
{
result = pthread_attr_setstacksize(&attr, t->stack_size);
GB_ASSERT(result == 0, "pthread_attr_setstacksize: errno = %d", result);
}
result = pthread_create(&t->posix_handle, &attr, thread_proc, thread);
GB_ASSERT(result == 0, "pthread_create: errno = %d", result);
// NOTE(bill): Free attr memory
result = pthread_attr_destroy(&attr);
GB_ASSERT(result == 0, "pthread_attr_destroy: errno = %d", result);
// NOTE(bill): So much boiler patch compared to windows.h (for once)
#endif
t->is_running = true;
semaphore::wait(&t->semaphore);
}
void
join(Thread* t)
{
if (!t->is_running) return;
#if defined(GB_SYSTEM_WINDOWS)
WaitForSingleObject(t->win32_handle, INFINITE);
CloseHandle(t->win32_handle);
t->win32_handle = INVALID_HANDLE_VALUE;
#else
int result = pthread_join(t->posix_handle, nullptr);
t->posix_handle = 0;
#endif
t->is_running = false;
}
inline bool
is_running(const Thread& thread)
{
return thread.is_running != 0;
}
inline u32
current_id()
{
u32 thread_id;
#if defined(GB_SYSTEM_WINDOWS)
u8* thread_local_storage = reinterpret_cast<u8*>(__readgsqword(0x30));
thread_id = *reinterpret_cast<u32*>(thread_local_storage + 0x48);
#elif defined(GB_SYSTEM_OSX) && defined(GB_ARCH_64_BIT)
asm("mov %%gs:0x00,%0" : "=r"(thread_id));
#elif defined(GB_ARCH_32_BIT)
asm("mov %%gs:0x08,%0" : "=r"(thread_id));
#elif defined(GB_ARCH_64_BIT)
asm("mov %%gs:0x10,%0" : "=r"(thread_id));
#else
#error Unsupported architecture for thread::current_id()
#endif
return thread_id;
}
} // namespace thread
namespace heap
{
namespace functions
{
internal_linkage void*
alloc(Allocator* a, usize size, usize align)
{
Heap* heap = reinterpret_cast<Heap*>(a);
if (heap->use_mutex) mutex::lock(&heap->mutex);
usize total = size + align - (size % align);
#if defined (GB_SYSTEM_WINDOWS)
total += sizeof(Heap::Header);
void* data = HeapAlloc(heap->win32_heap_handle, 0, total);
Heap::Header* h = static_cast<Heap::Header*>(data);
h->size = total;
data = (h + 1);
#else
// TODO(bill): Find a better malloc alternative for this platform
void* data = malloc(total);
#endif
heap->total_allocated_count += total;
heap->allocation_count++;
if (heap->use_mutex) mutex::unlock(&heap->mutex);
return data;
}
internal_linkage void
free(Allocator* a, void* ptr)
{
if (!ptr)
return;
Heap* heap = reinterpret_cast<Heap*>(a);
if (heap->use_mutex) mutex::lock(&heap->mutex);
heap->total_allocated_count -= allocated_size(heap, ptr);
heap->allocation_count--;
#if defined (GB_SYSTEM_WINDOWS)
auto* header = static_cast<Heap::Header*>(ptr) - 1;
HeapFree(heap->win32_heap_handle, 0, header);
#else
::free(ptr);
#endif
if (heap->use_mutex) mutex::unlock(&heap->mutex);
}
inline s64
allocated_size(Allocator* a, const void* ptr)
{
#if defined(GB_SYSTEM_WINDOWS)
auto* heap = reinterpret_cast<Heap*>(a);
if (heap->use_mutex) mutex::lock(&heap->mutex);
const auto* h = static_cast<const Heap::Header*>(ptr) - 1;
auto result = h->size;
if (heap->use_mutex) mutex::unlock(&heap->mutex);
return static_cast<usize>(result);
#elif defined(GB_SYSTEM_OSX)
return static_cast<usize>(malloc_size(ptr));
#elif defined(GB_SYSTEM_LINUX)
return static_cast<usize>(malloc_usable_size(ptr));
#else
#error Implement Heap::allocated_size
#endif
}
inline s64
total_allocated(Allocator* a)
{
auto* heap = reinterpret_cast<Heap*>(a);
if (heap->use_mutex) mutex::lock(&heap->mutex);
s64 result = heap->total_allocated_count;
if (heap->use_mutex) mutex::unlock(&heap->mutex);
return result;
}
} // namespace functions
Heap
make(bool use_mutex)
{
Heap heap = {};
heap.use_mutex = use_mutex;
if (use_mutex) heap.mutex = mutex::make();
#if defined(GB_SYSTEM_WINDOWS)
heap.win32_heap_handle = HeapCreate(0, 0, 0);
#endif
heap.alloc = functions::alloc;
heap.free = functions::free;
heap.allocated_size = functions::allocated_size;
heap.total_allocated = functions::total_allocated;
return heap;
}
void
destroy(Heap* heap)
{
if (heap->use_mutex) mutex::destroy(&heap->mutex);
#if defined (GB_SYSTEM_WINDOWS)
HeapDestroy(heap->win32_heap_handle);
#endif
}
} // namespace heap
namespace arena
{
namespace functions
{
internal_linkage void*
alloc(Allocator* a, usize size, usize align)
{
Arena* arena = reinterpret_cast<Arena*>(a);
s64 actual_size = size + align;
if (arena->total_allocated_count + actual_size > arena->total_size)
{
GB_ASSERT(arena->total_allocated_count + actual_size <= arena->total_size,
"Arena has no more space for allocation");
return nullptr;
}
void* ptr = memory::align_forward(memory::pointer_add(arena->physical_start, arena->total_allocated_count), align);
arena->total_allocated_count += actual_size;
return ptr;
}
inline void free(Allocator* a, void*) {} // NOTE(bill): Arenas free all at once
inline s64 allocated_size(Allocator*, const void*) { return -1; }
inline s64
total_allocated(Allocator* a)
{
return reinterpret_cast<Arena*>(a)->total_allocated_count;
}
} // namespace functions
Arena
make(Allocator* backing, usize size)
{
Arena arena = {};
arena.backing = backing;
arena.physical_start = nullptr;
arena.total_size = size;
arena.temp_count = 0;
arena.total_allocated_count = 0;
arena.physical_start = alloc(arena.backing, size);
arena.alloc = functions::alloc;
arena.free = functions::free;
arena.allocated_size = functions::allocated_size;
arena.total_allocated = functions::total_allocated;
return arena;
}
Arena
make(void* start, usize size)
{
Arena arena = {};
arena.backing = nullptr;
arena.physical_start = start;
arena.total_size = size;
arena.temp_count = 0;
arena.total_allocated_count = 0;
arena.alloc = functions::alloc;
arena.free = functions::free;
arena.allocated_size = functions::allocated_size;
arena.total_allocated = functions::total_allocated;
return arena;
}
void
destroy(Arena* arena)
{
if (arena->backing)
free(arena->backing, arena->physical_start);
GB_ASSERT(arena->temp_count == 0,
"%ld Temporary_Arena_Memory have not be cleared", arena->temp_count);
arena->total_allocated_count = 0;
}
inline void
clear(Arena* arena)
{
GB_ASSERT(arena->temp_count == 0,
"%ld Temporary_Arena_Memory have not be cleared", arena->temp_count);
arena->total_allocated_count = 0;
}
} // namespace arena
namespace temporary_arena_memory
{
inline Temporary_Arena_Memory
make(Arena* arena)
{
Temporary_Arena_Memory tmp = {};
tmp.arena = arena;
tmp.original_count = arena->total_allocated_count;
arena->temp_count++;
return tmp;
}
inline void
free(Temporary_Arena_Memory* tmp)
{
if (tmp->arena == nullptr) return;
GB_ASSERT(total_allocated(tmp->arena) >= tmp->original_count);
tmp->arena->total_allocated_count = tmp->original_count;
GB_ASSERT(tmp->arena->temp_count > 0);
tmp->arena->temp_count--;
}
} // namespace temporary_arena_memory
namespace pool
{
namespace functions
{
internal_linkage void*
alloc(Allocator* a, usize size, usize align)
{
Pool* pool = reinterpret_cast<Pool*>(a);
GB_ASSERT(size == pool->block_size, "Size must match block size");
GB_ASSERT(align == pool->block_align, "Align must match block align");
GB_ASSERT(pool->free_list, "Pool out of memory");
uintptr next_free = *reinterpret_cast<uintptr*>(pool->free_list);
void* ptr = pool->free_list;
pool->free_list = reinterpret_cast<void*>(next_free);
pool->total_size += pool->block_size;
return ptr;
}
internal_linkage void
free(Allocator* a, void* ptr)
{
if (!ptr) return;
Pool* pool = reinterpret_cast<Pool*>(a);
uintptr* next = static_cast<uintptr*>(ptr);
*next = reinterpret_cast<uintptr>(pool->free_list);
pool->free_list = ptr;
pool->total_size -= pool->block_size;
}
internal_linkage s64
allocated_size(Allocator*, const void*)
{
return -1;
}
internal_linkage s64
total_allocated(Allocator* a)
{
Pool* pool = reinterpret_cast<Pool*>(a);
return pool->total_size;
}
} // namespace functions
Pool
make(Allocator* backing, usize num_blocks, usize block_size, usize block_align)
{
Pool pool = {};
pool.backing = backing;
pool.block_size = block_size;
pool.block_align = block_align;
usize actual_block_size = block_size + block_align;
usize pool_size = num_blocks * actual_block_size;
u8* data = static_cast<u8*>(alloc(backing, pool_size, block_align));
// Init intrusive freelist
u8* curr = data;
for (usize block_index = 0; block_index < num_blocks-1; block_index++)
{
uintptr* next = reinterpret_cast<uintptr*>(curr);
*next = reinterpret_cast<uintptr>(curr) + actual_block_size;
curr += actual_block_size;
}
uintptr* end = reinterpret_cast<uintptr*>(curr);
*end = reinterpret_cast<uintptr>(nullptr);
pool.physical_start = data;
pool.free_list = data;
// Set functions pointers
pool.alloc = functions::alloc;
pool.free = functions::free;
pool.allocated_size = functions::allocated_size;
pool.total_allocated = functions::total_allocated;
return pool;
}
inline void
destroy(Pool* pool)
{
free(pool->backing, pool->physical_start);
}
} // namespace pool
////////////////////////////////
// //
// Memory //
// //
////////////////////////////////
namespace memory
{
inline void*
align_forward(void* ptr, usize align)
{
GB_ASSERT(GB_IS_POWER_OF_TWO(align),
"Alignment must be a power of two and not zero -- %llu", align);
uintptr p = uintptr(ptr);
const usize modulo = p % align;
if (modulo) p += (align - modulo);
return reinterpret_cast<void*>(p);
}
inline void*
pointer_add(void* ptr, usize bytes)
{
return static_cast<void*>(static_cast<u8*>(ptr) + bytes);
}
inline const void*
pointer_add(const void* ptr, usize bytes)
{
return static_cast<const void*>(static_cast<const u8*>(ptr) + bytes);
}
inline void*
pointer_sub(void* ptr, usize bytes)
{
return static_cast<void*>(static_cast<u8*>(ptr) - bytes);
}
inline const void*
pointer_sub(const void* ptr, usize bytes)
{
return static_cast<const void*>(static_cast<const u8*>(ptr) - bytes);
}
GB_FORCE_INLINE void*
set(void* ptr, usize bytes, u8 value)
{
return memset(ptr, value, bytes);
}
GB_FORCE_INLINE void*
zero(void* ptr, usize bytes)
{
return memory::set(ptr, bytes, 0);
}
GB_FORCE_INLINE void*
copy(const void* src, usize bytes, void* dest)
{
return memcpy(dest, src, bytes);
}
GB_FORCE_INLINE void*
move(const void* src, usize bytes, void* dest)
{
return memmove(dest, src, bytes);
}
GB_FORCE_INLINE bool
equals(const void* a, const void* b, usize bytes)
{
return (memcmp(a, b, bytes) == 0);
}
} // namespace memory
inline void*
alloc(Allocator* a, usize size, usize align)
{
GB_ASSERT(a != nullptr);
return a->alloc(a, size, align);
}
inline void
free(Allocator* a, void* ptr)
{
GB_ASSERT(a != nullptr);
if (ptr) a->free(a, ptr);
}
inline s64
allocated_size(Allocator* a, const void* ptr)
{
GB_ASSERT(a != nullptr);
return a->allocated_size(a, ptr);
}
inline s64
total_allocated(Allocator* a)
{
GB_ASSERT(a != nullptr);
return a->total_allocated(a);
}
////////////////////////////////
// //
// String //
// //
////////////////////////////////
namespace string
{
inline String
make(Allocator* a, const char* str)
{
return string::make(a, str, (string::Size)strlen(str));
}
String
make(Allocator* a, const void* init_str, Size len)
{
usize header_size = sizeof(string::Header);
void* ptr = alloc(a, header_size + len + 1);
if (!ptr) return nullptr;
if (!init_str) memory::zero(ptr, header_size + len + 1);
String str = static_cast<char*>(ptr) + header_size;
string::Header* header = string::header(str);
header->allocator = a;
header->length = len;
header->capacity = len;
if (len && init_str)
memory::copy(init_str, len, str);
str[len] = '\0';
return str;
}
inline void
free(String str)
{
if (str == nullptr) return;
string::Header* h = string::header(str);
if (h->allocator) free(h->allocator, h);
}
inline String
duplicate(Allocator* a, const String str)
{
return string::make(a, str, string::length(str));
}
inline Size
length(const String str)
{
return string::header(str)->length;
}
inline Size
capacity(const String str)
{
return string::header(str)->capacity;
}
inline Size
available_space(const String str)
{
string::Header* h = string::header(str);
if (h->capacity > h->length)
return h->capacity - h->length;
return 0;
}
inline void
clear(String str)
{
string::header(str)->length = 0;
str[0] = '\0';
}
void
append(String* str, char c)
{
Size curr_len = string::length(*str);
string::make_space_for(str, 1);
if (str == nullptr) return;
(*str)[curr_len] = c;
(*str)[curr_len + 1] = '\0';
string::header(*str)->length = curr_len + 1;
}
inline void
append(String* str, const String other)
{
string::append(str, other, string::length(other));
}
inline void
append_cstring(String* str, const char* other)
{
string::append(str, other, (Size)strlen(other));
}
void
append(String* str, const void* other, Size other_len)
{
Size curr_len = string::length(*str);
string::make_space_for(str, other_len);
if (str == nullptr)
return;
memory::copy(other, other_len, (*str) + curr_len);
(*str)[curr_len + other_len] = '\0';
string::header(*str)->length = curr_len + other_len;
}
namespace impl
{
// NOTE(bill): ptr _must_ be allocated with Allocator* a
internal_linkage inline void*
string_realloc(Allocator* a, void* ptr, usize old_size, usize new_size)
{
if (!ptr)
return alloc(a, new_size);
if (new_size < old_size)
new_size = old_size;
if (old_size == new_size)
return ptr;
void* new_ptr = alloc(a, new_size);
if (!new_ptr)
return nullptr;
memory::copy(ptr, old_size, new_ptr);
free(a, ptr);
return new_ptr;
}
} // namespace impl
void
make_space_for(String* str, Size add_len)
{
Size len = string::length(*str);
Size new_len = len + add_len;
Size available = string::available_space(*str);
if (available >= add_len) // Return if there is enough space left
return;
void* ptr = string::header(*str);
usize old_size = sizeof(string::Header) + string::length(*str) + 1;
usize new_size = sizeof(string::Header) + new_len + 1;
Allocator* a = string::header(*str)->allocator;
void* new_ptr = impl::string_realloc(a, ptr, old_size, new_size);
if (new_ptr == nullptr)
return;
string::Header* header = static_cast<string::Header*>(new_ptr);
header->allocator = a;
header->length = len;
header->capacity = new_len;
*str = reinterpret_cast<String>(header + 1);
}
usize
allocation_size(const String str)
{
Size cap = string::capacity(str);
return sizeof(string::Header) + cap;
}
bool
equals(const String lhs, const String rhs)
{
Size lhs_len = string::length(lhs);
Size rhs_len = string::length(rhs);
if (lhs_len != rhs_len)
return false;
for (Size i = 0; i < lhs_len; i++)
{
if (lhs[i] != rhs[i])
return false;
}
return true;
}
int
compare(const String lhs, const String rhs) // NOTE(bill): three-way comparison
{
// Treat as cstring
const char* str1 = lhs;
const char* str2 = rhs;
int s1;
int s2;
do
{
s1 = *str1++;
s2 = *str2++;
if (s1 == 0)
break;
}
while (s1 == s2);
return (s1 < s2) ? -1 : (s1 > s2);
}
void
trim(String* str, const char* cut_set)
{
char* start;
char* end;
char* start_pos;
char* end_pos;
start_pos = start = *str;
end_pos = end = *str + string::length(*str) - 1;
while (start_pos <= end && strchr(cut_set, *start_pos))
start_pos++;
while (end_pos > start_pos && strchr(cut_set, *end_pos))
end_pos--;
Size len = static_cast<Size>((start_pos > end_pos) ? 0 : ((end_pos - start_pos)+1));
if (*str != start_pos)
memory::move(start_pos, len, *str);
(*str)[len] = '\0';
string::header(*str)->length = len;
}
inline void
trim_space(String* str)
{
trim(str, " \n\r\t\v\f");
}
} // namespace string
////////////////////////////////
// //
// Hash //
// //
////////////////////////////////
namespace hash
{
u32
adler32(const void* key, u32 num_bytes)
{
const u32 MOD_ADLER = 65521;
u32 a = 1;
u32 b = 0;
const u8* bytes = static_cast<const u8*>(key);
for (u32 i = 0; i < num_bytes; i++)
{
a = (a + bytes[i]) % MOD_ADLER;
b = (b + a) % MOD_ADLER;
}
return (b << 16) | a;
}
global_variable const u32 GB_CRC32_TABLE[256] = {
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
global_variable const u64 GB_CRC64_TABLE[256] = {
0x0000000000000000ull, 0x42F0E1EBA9EA3693ull, 0x85E1C3D753D46D26ull, 0xC711223CFA3E5BB5ull,
0x493366450E42ECDFull, 0x0BC387AEA7A8DA4Cull, 0xCCD2A5925D9681F9ull, 0x8E224479F47CB76Aull,
0x9266CC8A1C85D9BEull, 0xD0962D61B56FEF2Dull, 0x17870F5D4F51B498ull, 0x5577EEB6E6BB820Bull,
0xDB55AACF12C73561ull, 0x99A54B24BB2D03F2ull, 0x5EB4691841135847ull, 0x1C4488F3E8F96ED4ull,
0x663D78FF90E185EFull, 0x24CD9914390BB37Cull, 0xE3DCBB28C335E8C9ull, 0xA12C5AC36ADFDE5Aull,
0x2F0E1EBA9EA36930ull, 0x6DFEFF5137495FA3ull, 0xAAEFDD6DCD770416ull, 0xE81F3C86649D3285ull,
0xF45BB4758C645C51ull, 0xB6AB559E258E6AC2ull, 0x71BA77A2DFB03177ull, 0x334A9649765A07E4ull,
0xBD68D2308226B08Eull, 0xFF9833DB2BCC861Dull, 0x388911E7D1F2DDA8ull, 0x7A79F00C7818EB3Bull,
0xCC7AF1FF21C30BDEull, 0x8E8A101488293D4Dull, 0x499B3228721766F8ull, 0x0B6BD3C3DBFD506Bull,
0x854997BA2F81E701ull, 0xC7B97651866BD192ull, 0x00A8546D7C558A27ull, 0x4258B586D5BFBCB4ull,
0x5E1C3D753D46D260ull, 0x1CECDC9E94ACE4F3ull, 0xDBFDFEA26E92BF46ull, 0x990D1F49C77889D5ull,
0x172F5B3033043EBFull, 0x55DFBADB9AEE082Cull, 0x92CE98E760D05399ull, 0xD03E790CC93A650Aull,
0xAA478900B1228E31ull, 0xE8B768EB18C8B8A2ull, 0x2FA64AD7E2F6E317ull, 0x6D56AB3C4B1CD584ull,
0xE374EF45BF6062EEull, 0xA1840EAE168A547Dull, 0x66952C92ECB40FC8ull, 0x2465CD79455E395Bull,
0x3821458AADA7578Full, 0x7AD1A461044D611Cull, 0xBDC0865DFE733AA9ull, 0xFF3067B657990C3Aull,
0x711223CFA3E5BB50ull, 0x33E2C2240A0F8DC3ull, 0xF4F3E018F031D676ull, 0xB60301F359DBE0E5ull,
0xDA050215EA6C212Full, 0x98F5E3FE438617BCull, 0x5FE4C1C2B9B84C09ull, 0x1D14202910527A9Aull,
0x93366450E42ECDF0ull, 0xD1C685BB4DC4FB63ull, 0x16D7A787B7FAA0D6ull, 0x5427466C1E109645ull,
0x4863CE9FF6E9F891ull, 0x0A932F745F03CE02ull, 0xCD820D48A53D95B7ull, 0x8F72ECA30CD7A324ull,
0x0150A8DAF8AB144Eull, 0x43A04931514122DDull, 0x84B16B0DAB7F7968ull, 0xC6418AE602954FFBull,
0xBC387AEA7A8DA4C0ull, 0xFEC89B01D3679253ull, 0x39D9B93D2959C9E6ull, 0x7B2958D680B3FF75ull,
0xF50B1CAF74CF481Full, 0xB7FBFD44DD257E8Cull, 0x70EADF78271B2539ull, 0x321A3E938EF113AAull,
0x2E5EB66066087D7Eull, 0x6CAE578BCFE24BEDull, 0xABBF75B735DC1058ull, 0xE94F945C9C3626CBull,
0x676DD025684A91A1ull, 0x259D31CEC1A0A732ull, 0xE28C13F23B9EFC87ull, 0xA07CF2199274CA14ull,
0x167FF3EACBAF2AF1ull, 0x548F120162451C62ull, 0x939E303D987B47D7ull, 0xD16ED1D631917144ull,
0x5F4C95AFC5EDC62Eull, 0x1DBC74446C07F0BDull, 0xDAAD56789639AB08ull, 0x985DB7933FD39D9Bull,
0x84193F60D72AF34Full, 0xC6E9DE8B7EC0C5DCull, 0x01F8FCB784FE9E69ull, 0x43081D5C2D14A8FAull,
0xCD2A5925D9681F90ull, 0x8FDAB8CE70822903ull, 0x48CB9AF28ABC72B6ull, 0x0A3B7B1923564425ull,
0x70428B155B4EAF1Eull, 0x32B26AFEF2A4998Dull, 0xF5A348C2089AC238ull, 0xB753A929A170F4ABull,
0x3971ED50550C43C1ull, 0x7B810CBBFCE67552ull, 0xBC902E8706D82EE7ull, 0xFE60CF6CAF321874ull,
0xE224479F47CB76A0ull, 0xA0D4A674EE214033ull, 0x67C58448141F1B86ull, 0x253565A3BDF52D15ull,
0xAB1721DA49899A7Full, 0xE9E7C031E063ACECull, 0x2EF6E20D1A5DF759ull, 0x6C0603E6B3B7C1CAull,
0xF6FAE5C07D3274CDull, 0xB40A042BD4D8425Eull, 0x731B26172EE619EBull, 0x31EBC7FC870C2F78ull,
0xBFC9838573709812ull, 0xFD39626EDA9AAE81ull, 0x3A28405220A4F534ull, 0x78D8A1B9894EC3A7ull,
0x649C294A61B7AD73ull, 0x266CC8A1C85D9BE0ull, 0xE17DEA9D3263C055ull, 0xA38D0B769B89F6C6ull,
0x2DAF4F0F6FF541ACull, 0x6F5FAEE4C61F773Full, 0xA84E8CD83C212C8Aull, 0xEABE6D3395CB1A19ull,
0x90C79D3FEDD3F122ull, 0xD2377CD44439C7B1ull, 0x15265EE8BE079C04ull, 0x57D6BF0317EDAA97ull,
0xD9F4FB7AE3911DFDull, 0x9B041A914A7B2B6Eull, 0x5C1538ADB04570DBull, 0x1EE5D94619AF4648ull,
0x02A151B5F156289Cull, 0x4051B05E58BC1E0Full, 0x87409262A28245BAull, 0xC5B073890B687329ull,
0x4B9237F0FF14C443ull, 0x0962D61B56FEF2D0ull, 0xCE73F427ACC0A965ull, 0x8C8315CC052A9FF6ull,
0x3A80143F5CF17F13ull, 0x7870F5D4F51B4980ull, 0xBF61D7E80F251235ull, 0xFD913603A6CF24A6ull,
0x73B3727A52B393CCull, 0x31439391FB59A55Full, 0xF652B1AD0167FEEAull, 0xB4A25046A88DC879ull,
0xA8E6D8B54074A6ADull, 0xEA16395EE99E903Eull, 0x2D071B6213A0CB8Bull, 0x6FF7FA89BA4AFD18ull,
0xE1D5BEF04E364A72ull, 0xA3255F1BE7DC7CE1ull, 0x64347D271DE22754ull, 0x26C49CCCB40811C7ull,
0x5CBD6CC0CC10FAFCull, 0x1E4D8D2B65FACC6Full, 0xD95CAF179FC497DAull, 0x9BAC4EFC362EA149ull,
0x158E0A85C2521623ull, 0x577EEB6E6BB820B0ull, 0x906FC95291867B05ull, 0xD29F28B9386C4D96ull,
0xCEDBA04AD0952342ull, 0x8C2B41A1797F15D1ull, 0x4B3A639D83414E64ull, 0x09CA82762AAB78F7ull,
0x87E8C60FDED7CF9Dull, 0xC51827E4773DF90Eull, 0x020905D88D03A2BBull, 0x40F9E43324E99428ull,
0x2CFFE7D5975E55E2ull, 0x6E0F063E3EB46371ull, 0xA91E2402C48A38C4ull, 0xEBEEC5E96D600E57ull,
0x65CC8190991CB93Dull, 0x273C607B30F68FAEull, 0xE02D4247CAC8D41Bull, 0xA2DDA3AC6322E288ull,
0xBE992B5F8BDB8C5Cull, 0xFC69CAB42231BACFull, 0x3B78E888D80FE17Aull, 0x7988096371E5D7E9ull,
0xF7AA4D1A85996083ull, 0xB55AACF12C735610ull, 0x724B8ECDD64D0DA5ull, 0x30BB6F267FA73B36ull,
0x4AC29F2A07BFD00Dull, 0x08327EC1AE55E69Eull, 0xCF235CFD546BBD2Bull, 0x8DD3BD16FD818BB8ull,
0x03F1F96F09FD3CD2ull, 0x41011884A0170A41ull, 0x86103AB85A2951F4ull, 0xC4E0DB53F3C36767ull,
0xD8A453A01B3A09B3ull, 0x9A54B24BB2D03F20ull, 0x5D45907748EE6495ull, 0x1FB5719CE1045206ull,
0x919735E51578E56Cull, 0xD367D40EBC92D3FFull, 0x1476F63246AC884Aull, 0x568617D9EF46BED9ull,
0xE085162AB69D5E3Cull, 0xA275F7C11F7768AFull, 0x6564D5FDE549331Aull, 0x279434164CA30589ull,
0xA9B6706FB8DFB2E3ull, 0xEB46918411358470ull, 0x2C57B3B8EB0BDFC5ull, 0x6EA7525342E1E956ull,
0x72E3DAA0AA188782ull, 0x30133B4B03F2B111ull, 0xF7021977F9CCEAA4ull, 0xB5F2F89C5026DC37ull,
0x3BD0BCE5A45A6B5Dull, 0x79205D0E0DB05DCEull, 0xBE317F32F78E067Bull, 0xFCC19ED95E6430E8ull,
0x86B86ED5267CDBD3ull, 0xC4488F3E8F96ED40ull, 0x0359AD0275A8B6F5ull, 0x41A94CE9DC428066ull,
0xCF8B0890283E370Cull, 0x8D7BE97B81D4019Full, 0x4A6ACB477BEA5A2Aull, 0x089A2AACD2006CB9ull,
0x14DEA25F3AF9026Dull, 0x562E43B4931334FEull, 0x913F6188692D6F4Bull, 0xD3CF8063C0C759D8ull,
0x5DEDC41A34BBEEB2ull, 0x1F1D25F19D51D821ull, 0xD80C07CD676F8394ull, 0x9AFCE626CE85B507ull,
};
u32
crc32(const void* key, u32 num_bytes)
{
u32 result = static_cast<u32>(~0);
const u8* c = reinterpret_cast<const u8*>(key);
for (u32 remaining = num_bytes; remaining--; c++)
result = (result >> 8) ^ (GB_CRC32_TABLE[(result ^ *c) & 0xff]);
return ~result;
}
u64
crc64(const void* key, usize num_bytes)
{
u64 result = static_cast<u64>(~0);
const u8* c = reinterpret_cast<const u8*>(key);
for (usize remaining = num_bytes; remaining--; c++)
result = (result >> 8) ^ (GB_CRC64_TABLE[(result ^ *c) & 0xff]);
return ~result;
}
inline u32
fnv32(const void* key, usize num_bytes)
{
u32 h = 0x811c9dc5;
const u8* buffer = static_cast<const u8*>(key);
for (usize i = 0; i < num_bytes; i++)
{
h = (h * 0x01000193) ^ buffer[i];
}
return h;
}
inline u64
fnv64(const void* key, usize num_bytes)
{
u64 h = 0xcbf29ce484222325ull;
const u8* buffer = static_cast<const u8*>(key);
for (usize i = 0; i < num_bytes; i++)
{
h = (h * 0x100000001B3ll) ^ buffer[i];
}
return h;
}
inline u32
fnv32a(const void* key, usize num_bytes)
{
u32 h = 0x811c9dc5;
const u8* buffer = static_cast<const u8*>(key);
for (usize i = 0; i < num_bytes; i++)
{
h = (h ^ buffer[i]) * 0x01000193;
}
return h;
}
inline u64
fnv64a(const void* key, usize num_bytes)
{
u64 h = 0xcbf29ce484222325ull;
const u8* buffer = static_cast<const u8*>(key);
for (usize i = 0; i < num_bytes; i++)
{
h = (h ^ buffer[i]) * 0x100000001B3ll;
}
return h;
}
u32
murmur32(const void* key, u32 num_bytes, u32 seed)
{
local_persist const u32 c1 = 0xcc9e2d51;
local_persist const u32 c2 = 0x1b873593;
local_persist const u32 r1 = 15;
local_persist const u32 r2 = 13;
local_persist const u32 m = 5;
local_persist const u32 n = 0xe6546b64;
u32 hash = seed;
const usize nblocks = num_bytes / 4;
const u32* blocks = static_cast<const u32*>(key);
for (usize i = 0; i < nblocks; i++) {
u32 k = blocks[i];
k *= c1;
k = (k << r1) | (k >> (32 - r1));
k *= c2;
hash ^= k;
hash = ((hash << r2) | (hash >> (32 - r2))) * m + n;
}
const u8* tail = (static_cast<const u8*>(key)) + nblocks * 4;
u32 k1 = 0;
switch (num_bytes & 3) {
case 3:
k1 ^= tail[2] << 16;
case 2:
k1 ^= tail[1] << 8;
case 1:
k1 ^= tail[0];
k1 *= c1;
k1 = (k1 << r1) | (k1 >> (32 - r1));
k1 *= c2;
hash ^= k1;
}
hash ^= num_bytes;
hash ^= (hash >> 16);
hash *= 0x85ebca6b;
hash ^= (hash >> 13);
hash *= 0xc2b2ae35;
hash ^= (hash >> 16);
return hash;
}
#if defined(GB_ARCH_64_BIT)
u64
murmur64(const void* key, usize num_bytes, u64 seed)
{
local_persist const u64 m = 0xc6a4a7935bd1e995ULL;
local_persist const s32 r = 47;
u64 h = seed ^ (num_bytes * m);
const u64* data = static_cast<const u64*>(key);
const u64* end = data + (num_bytes / 8);
while (data != end)
{
u64 k = *data++;
k *= m;
k ^= k >> r;
k *= m;
h ^= k;
h *= m;
}
const u8* data2 = reinterpret_cast<const u8*>(data);
switch (num_bytes & 7)
{
case 7: h ^= static_cast<u64>(data2[6]) << 48;
case 6: h ^= static_cast<u64>(data2[5]) << 40;
case 5: h ^= static_cast<u64>(data2[4]) << 32;
case 4: h ^= static_cast<u64>(data2[3]) << 24;
case 3: h ^= static_cast<u64>(data2[2]) << 16;
case 2: h ^= static_cast<u64>(data2[1]) << 8;
case 1: h ^= static_cast<u64>(data2[0]);
h *= m;
};
h ^= h >> r;
h *= m;
h ^= h >> r;
return h;
}
#elif GB_ARCH_32_BIT
u64
murmur64(const void* key, usize num_bytes, u64 seed)
{
local_persist const u32 m = 0x5bd1e995;
local_persist const s32 r = 24;
u32 h1 = static_cast<u32>(seed) ^ static_cast<u32>(num_bytes);
u32 h2 = static_cast<u32>(seed >> 32);
const u32* data = static_cast<const u32*>(key);
while (num_bytes >= 8)
{
u32 k1 = *data++;
k1 *= m;
k1 ^= k1 >> r;
k1 *= m;
h1 *= m;
h1 ^= k1;
num_bytes -= 4;
u32 k2 = *data++;
k2 *= m;
k2 ^= k2 >> r;
k2 *= m;
h2 *= m;
h2 ^= k2;
num_bytes -= 4;
}
if (num_bytes >= 4)
{
u32 k1 = *data++;
k1 *= m;
k1 ^= k1 >> r;
k1 *= m;
h1 *= m;
h1 ^= k1;
num_bytes -= 4;
}
switch (num_bytes)
{
case 3: h2 ^= reinterpret_cast<const u8*>(data)[2] << 16;
case 2: h2 ^= reinterpret_cast<const u8*>(data)[1] << 8;
case 1: h2 ^= reinterpret_cast<const u8*>(data)[0] << 0;
h2 *= m;
};
h1 ^= h2 >> 18;
h1 *= m;
h2 ^= h1 >> 22;
h2 *= m;
h1 ^= h2 >> 17;
h1 *= m;
h2 ^= h1 >> 19;
h2 *= m;
u64 h = h1;
h = (h << 32) | h2;
return h;
}
#else
#error murmur64 function not supported on this architecture
#endif
} // namespace hash
////////////////////////////////
// //
// Time //
// //
////////////////////////////////
const Time TIME_ZERO = time::seconds(0);
namespace time
{
#if defined(GB_SYSTEM_WINDOWS)
internal_linkage LARGE_INTEGER
win32_get_frequency()
{
LARGE_INTEGER f;
QueryPerformanceFrequency(&f);
return f;
}
Time
now()
{
// NOTE(bill): std::chrono does not have a good enough precision in MSVC12
// and below. This may have been fixed in MSVC14 but unsure as of yet.
// Force the following code to run on first core
// NOTE(bill): See
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms644904(v=vs.85).aspx
HANDLE currentThread = GetCurrentThread();
DWORD_PTR previousMask = SetThreadAffinityMask(currentThread, 1);
// Get the frequency of the performance counter
// It is constant across the program's lifetime
local_persist LARGE_INTEGER s_frequency = win32_get_frequency();
// Get the current time
LARGE_INTEGER t;
QueryPerformanceCounter(&t);
// Restore the thread affinity
SetThreadAffinityMask(currentThread, previousMask);
return time::microseconds(1000000ll * t.QuadPart / s_frequency.QuadPart);
}
void
sleep(Time t)
{
if (t.microseconds <= 0)
return;
// Get the supported timer resolutions on this system
TIMECAPS tc;
timeGetDevCaps(&tc, sizeof(TIMECAPS));
// Set the timer resolution to the minimum for the Sleep call
timeBeginPeriod(tc.wPeriodMin);
// Wait...
::Sleep(time::as_milliseconds(t));
// Reset the timer resolution back to the system default
timeBeginPeriod(tc.wPeriodMin);
}
#else
Time
now()
{
#if defined(GB_SYSTEM_OSX)
s64 t = static_cast<s64>(mach_absolute_time());
return microseconds(t);
#else
struct timeval t;
gettimeofday(&t, nullptr);
return microseconds((t.tv_sec * 1000000ll) + (t.tv_usec * 1ll));
#endif
}
void
sleep(Time t)
{
if (t.microseconds <= 0)
return;
struct timespec spec = {};
spec.tv_sec = static_cast<s64>(as_seconds(t));
spec.tv_nsec = 1000ll * (as_microseconds(t) % 1000000ll);
nanosleep(&spec, nullptr);
}
#endif
Time seconds(f32 s) { return {static_cast<s64>(s * 1000000ll)}; }
Time milliseconds(s32 ms) { return {static_cast<s64>(ms * 1000l)}; }
Time microseconds(s64 us) { return {us}; }
f32 as_seconds(Time t) { return static_cast<f32>(t.microseconds / 1000000.0f); }
s32 as_milliseconds(Time t) { return static_cast<s32>(t.microseconds / 1000l); }
s64 as_microseconds(Time t) { return t.microseconds; }
} // namespace time
bool operator==(Time left, Time right) { return left.microseconds == right.microseconds; }
bool operator!=(Time left, Time right) { return !operator==(left, right); }
bool operator<(Time left, Time right) { return left.microseconds < right.microseconds; }
bool operator>(Time left, Time right) { return left.microseconds > right.microseconds; }
bool operator<=(Time left, Time right) { return left.microseconds <= right.microseconds; }
bool operator>=(Time left, Time right) { return left.microseconds >= right.microseconds; }
Time operator+(Time right) { return {+right.microseconds}; }
Time operator-(Time right) { return {-right.microseconds}; }
Time operator+(Time left, Time right) { return {left.microseconds + right.microseconds}; }
Time operator-(Time left, Time right) { return {left.microseconds - right.microseconds}; }
Time& operator+=(Time& left, Time right) { return (left = left + right); }
Time& operator-=(Time& left, Time right) { return (left = left - right); }
Time operator*(Time left, f32 right) { return time::seconds(time::as_seconds(left) * right); }
Time operator*(Time left, s64 right) { return time::microseconds(time::as_microseconds(left) * right); }
Time operator*(f32 left, Time right) { return time::seconds(time::as_seconds(right) * left); }
Time operator*(s64 left, Time right) { return time::microseconds(time::as_microseconds(right) * left); }
Time& operator*=(Time& left, f32 right) { return (left = left * right); }
Time& operator*=(Time& left, s64 right) { return (left = left * right); }
Time operator/(Time left, f32 right) { return time::seconds(time::as_seconds(left) / right); }
Time operator/(Time left, s64 right) { return time::microseconds(time::as_microseconds(left) / right); }
f32 operator/(Time left, Time right) { return time::as_seconds(left) / time::as_seconds(right); }
Time& operator/=(Time& left, f32 right) { return (left = left / right); }
Time& operator/=(Time& left, s64 right) { return (left = left / right); }
Time operator%(Time left, Time right) { return time::microseconds(time::as_microseconds(left) % time::as_microseconds(right)); }
Time& operator%=(Time& left, Time right) { return (left = left % right); }
////////////////////////////////
// //
// OS //
// //
////////////////////////////////
namespace os
{
GB_FORCE_INLINE u64
rdtsc()
{
#if GB_SYSTEM_WINDOWS
return ::__rdtsc();
#else
// TODO(bill): Check that rdtsc() works
return ::rdtsc();
#endif
}
} // namespace os
__GB_NAMESPACE_END
#endif // GB_IMPLEMENTATION
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