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gb.hpp - Code rearrangement into namespaces

This commit is contained in:
Ginger Bill 2015-11-18 15:05:10 +00:00
parent 6a907c89a3
commit e6479090cd
3 changed files with 474 additions and 314 deletions
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3
.gitignore vendored
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@ -222,5 +222,6 @@ _Pvt_Extensions
misc/ misc/
*.sublime* *.sublime*
test.* test.*
src src/
*.sln *.sln
run.bat

16
README.md
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@ -5,7 +5,7 @@ gb single-file public domain libraries for C & C++
library | latest version | category | languages | description library | latest version | category | languages | description
----------------|----------------|----------|-----------|------------- ----------------|----------------|----------|-----------|-------------
**gb_string.h** | 0.93 | strings | C, C++ | A better string library for C & C++ **gb_string.h** | 0.93 | strings | C, C++ | A better string library for C & C++
**gb.hpp** | 0.21d | misc | C++11 | (Experimental) A C++11 helper library without STL geared towards game development **gb.hpp** | 0.22 | misc | C++11 | (Experimental) A C++11 helper library without STL geared towards game development
**gb_math.hpp** | 0.02b | math | C++11 | A C++11 math library geared towards game development **gb_math.hpp** | 0.02b | math | C++11 | A C++11 math library geared towards game development
**gb_ini.h** | 0.91 | misc | C, C++ | A simple ini file loader library for C & C++ **gb_ini.h** | 0.91 | misc | C, C++ | A simple ini file loader library for C & C++
@ -26,3 +26,17 @@ Yes. I think these libraries are brilliant and use many of these on a daily basi
### May I contribute? ### May I contribute?
Yes. Yes.
### What is the versioning system that you use?
I may change it in the future but at the moment it is like this this:
`1.23b`
* `1` = major version
* `23` = minor version
* `b` = patch
- 1.23 => zero patches
- 1.23a => patch 1
- 1.23b => patch 2
- etc.

769
gb.hpp
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@ -1,8 +1,9 @@
// gb.hpp - v0.21d - public domain C++11 helper library - no warranty implied; use at your own risk // gb.hpp - v0.22 - 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 // (Experimental) A C++11 helper library without STL geared towards game development
/* /*
Version History: Version History:
0.22 - Code rearrangment into namespaces
0.21d - Fix array::free 0.21d - Fix array::free
0.21c - Fix Another Typo causing unresolved external symbol 0.21c - Fix Another Typo causing unresolved external symbol
0.21b - Typo fixes 0.21b - Typo fixes
@ -611,6 +612,38 @@ __GB_NAMESPACE_END
#define GB_DEFER_2(x, y) GB_DEFER_1(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 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;}) #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()); // 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 #endif
#if !defined(GB_CASTS_WITHOUT_NAMESPACE) #if !defined(GB_CASTS_WITHOUT_NAMESPACE)
@ -619,16 +652,6 @@ __GB_NAMESPACE_START
#ifndef GB_SPECIAL_CASTS #ifndef GB_SPECIAL_CASTS
#define GB_SPECIAL_CASTS #define GB_SPECIAL_CASTS
// 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);
}
// NOTE(bill): Very similar to doing `*(T*)(&u)` // NOTE(bill): Very similar to doing `*(T*)(&u)`
template <typename Dest, typename Source> template <typename Dest, typename Source>
inline Dest inline Dest
@ -640,6 +663,16 @@ __GB_NAMESPACE_START
::memcpy(&dest, &source, sizeof(Dest)); ::memcpy(&dest, &source, sizeof(Dest));
return 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);
}
#endif #endif
// FORENOTE(bill): There used to be a magic_cast that was equivalent to // FORENOTE(bill): There used to be a magic_cast that was equivalent to
@ -719,6 +752,8 @@ void post(Semaphore* semaphore, u32 count = 1);
void wait(Semaphore* semaphore); void wait(Semaphore* semaphore);
} // namespace semaphore } // namespace semaphore
// TODO(bill): Should I make a std::function<> equivalent to allow for captured lambdas?
// TODO(bill): Is this thread function definitions good enough?
using Thread_Function = s32(void*); using Thread_Function = s32(void*);
struct Thread struct Thread
@ -781,6 +816,47 @@ struct Allocator
GB_DISABLE_COPY(Allocator); GB_DISABLE_COPY(Allocator);
}; };
// TODO(bill): Should `Allocator` not even be a pure virtual base class?
/*
// Alternative Allocator types
struct Allocator
{
void* data;
void* (*alloc)(usize size, usize align);
void (*dealloc)(const void* ptr);
s64 (*allocated_size)(const void* ptr);
s64 (*total_allocated)(void);
};
// or
enum class Allocator_Mode
{
ALLOC,
DEALLOC,
ALLOCATED_SIZE,
TOTAL_ALLOCATED,
};
using Allocator_Function = void*(Allocator_Mode mode,
s64 size, s64 align,
void* old_memory_pointer,
s64* output_size,
void* allocator_data, s64 flags);
struct Allocator
{
void* data;
Allocator_Function* function;
};
// Both of these may be better and more customizable but I do not know. I need to think about this.
// And discuss with others.
// The latter method would allow for one function call but the allocation is usually much slower than
// dereferencing the function pointer
*/
/// An allocator that used the malloc(). Allocations are padded with the size of /// An allocator that used the malloc(). Allocations are padded with the size of
/// the allocation and align them to the desired alignment /// the allocation and align them to the desired alignment
struct Heap_Allocator : Allocator struct Heap_Allocator : Allocator
@ -801,8 +877,6 @@ struct Heap_Allocator : Allocator
virtual void dealloc(const void* ptr); virtual void dealloc(const void* ptr);
virtual s64 allocated_size(const void* ptr); virtual s64 allocated_size(const void* ptr);
virtual s64 total_allocated(); virtual s64 total_allocated();
Header* get_header_ptr(const void* ptr);
}; };
struct Arena_Allocator : Allocator struct Arena_Allocator : Allocator
@ -849,6 +923,23 @@ struct Temp_Allocator : Allocator
}; };
namespace heap_allocator
{
Heap_Allocator::Header* get_header_ptr(const void* ptr);
} // namespace heap_allocator
namespace arena_allocator
{
void clear(Arena_Allocator* arena);
} // namespace arena_allocator
namespace temporary_arena_memory
{
Temporary_Arena_Memory make(Arena_Allocator* arena);
void free(Temporary_Arena_Memory* tmp);
} // namespace temporary_arena_memory
namespace memory namespace memory
{ {
void* align_forward(void* ptr, usize align); void* align_forward(void* ptr, usize align);
@ -866,6 +957,7 @@ bool equals(const void* a, const void* b, usize bytes);
inline void* alloc(Allocator* a, usize size, usize align = GB_DEFAULT_ALIGNMENT) { GB_ASSERT(a != nullptr); return a->alloc(size, align); } inline void* alloc(Allocator* a, usize size, usize align = GB_DEFAULT_ALIGNMENT) { GB_ASSERT(a != nullptr); return a->alloc(size, align); }
inline void dealloc(Allocator* a, const void* ptr) { GB_ASSERT(a != nullptr); return a->dealloc(ptr); } inline void dealloc(Allocator* a, const void* ptr) { GB_ASSERT(a != nullptr); return a->dealloc(ptr); }
// TODO(bill): Should I overload free() or not would that be too confusing?
template <typename T> template <typename T>
inline T* alloc_struct(Allocator* a) { return static_cast<T*>(alloc(a, sizeof(T), alignof(T))); } inline T* alloc_struct(Allocator* a) { return static_cast<T*>(alloc(a, sizeof(T), alignof(T))); }
@ -876,154 +968,6 @@ inline T* alloc_array(Allocator* a, usize count) { return static_cast<T*>(alloc(
template <typename T, usize count> template <typename T, usize count>
inline T* alloc_array(Allocator* a) { return static_cast<T*>(alloc(a, count * sizeof(T), alignof(T))); } inline T* alloc_array(Allocator* a) { return static_cast<T*>(alloc(a, count * sizeof(T), alignof(T))); }
inline void
clear_arena(Arena_Allocator* arena)
{
GB_ASSERT(arena->temp_count == 0,
"%ld Temporary_Arena_Memory have not be cleared", arena->temp_count);
arena->total_allocated_count = 0;
}
inline Temporary_Arena_Memory
make_temporary_arena_memory(Arena_Allocator* arena)
{
Temporary_Arena_Memory tmp = {};
tmp.arena = arena;
tmp.original_count = arena->total_allocated_count;
}
inline void
free_temporary_arena_memory(Temporary_Arena_Memory* tmp)
{
if (tmp->arena == nullptr)
return;
GB_ASSERT(tmp->arena->total_allocated() >= tmp->original_count);
tmp->arena->total_allocated_count = tmp->original_count;
GB_ASSERT(tmp->arena->temp_count > 0);
tmp->arena->temp_count--;
}
template <usize BUFFER_SIZE>
Temp_Allocator<BUFFER_SIZE>::Temp_Allocator(Allocator* backing_)
: backing(backing_)
, chunk_size(4 * 1024) // 4K
{
current_pointer = physical_start = buffer;
physical_end = physical_start + BUFFER_SIZE;
*static_cast<void**>(physical_start) = 0;
current_pointer = memory::pointer_add(current_pointer, sizeof(void*));
}
template <usize BUFFER_SIZE>
Temp_Allocator<BUFFER_SIZE>::~Temp_Allocator()
{
void* ptr = *static_cast<void**>(buffer);
while (ptr)
{
void* next = *static_cast<void**>(ptr);
backing_->dealloc(ptr);
ptr = next;
}
}
template <usize BUFFER_SIZE>
void*
Temp_Allocator<BUFFER_SIZE>::alloc(usize size, usize align)
{
current_pointer = static_cast<u8*>(memory::align_forward(current_pointer, align));
if (size > static_cast<usize>(physical_end) - current_pointer)
{
usize to_allocate = sizeof(void*) + size + align;
if (to_allocate < chunk_size)
to_allocate = chunk_size;
chunk_size *= 2;
void* ptr = backing_->alloc(to_allocate);
*static_cast<void**>(physical_start) = ptr;
current_pointer = physical_start = static_cast<u8*>(ptr);
*static_cast<void**>(physical_start) = 0;
current_pointer = memory::pointer_add(current_pointer, sizeof(void*));
current_pointer = static_cast<u8*>(memory::align_forward(current_pointer, align));
}
void* result = current_pointer;
current_pointer += size;
return (result);
}
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);
}
inline void*
set(void* ptr, u8 value, usize bytes)
{
return memset(ptr, value, bytes);
}
inline void*
zero(void* ptr, usize bytes)
{
return memory::set(ptr, 0, bytes);
}
inline void*
copy(void* dest, const void* src, usize bytes)
{
return memcpy(dest, src, bytes);
}
inline void*
move(void* dest, const void* src, usize bytes)
{
return memmove(dest, src, bytes);
}
inline bool
equals(const void* a, const void* b, usize bytes)
{
return (memcmp(a, b, bytes) == 0);
}
} // namespace memory
//////////////////////////////// ////////////////////////////////
/// /// /// ///
/// String /// /// String ///
@ -1247,12 +1191,295 @@ template <typename T> void remove_all(Hash_Table<T>* h, u64 key);
} // namespace multi_hash_table } // 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);
// TODO(bill): Complete hashing functions
// 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
////////////////////////////////
/// ///
/// 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 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 ///
/// ///
////////////////////////////////
namespace os
{
u64 time_stamp_counter();
} // namespace os
#if 0
// TODO(bill): still in development
struct File
{
#if defined(GB_SYSTEM_WINDOWS)
HANDLE win32_handle;
Mutex mutex;
char* name; // TODO(bill): uses malloc
b32 is_console;
#else
#error Implement file system
#endif
};
namespace file
{
enum Flag : u32
{
READ = 0x1,
WRITE = 0x2,
};
uintptr fd(const File* file);
bool new_from_fd(File* file, uintptr fd, const char* name);
bool open(File* file, const char* filename, u32 flag, u32 perm);
bool close(File* file);
bool create(File* file, const char* filename, u32 flag);
bool read(File* file, void* buffer, u32 bytes_to_read);
bool write(File* file, const void* memory, u32 bytes_to_write);
bool read_at(File* file, void* buffer, u32 bytes_to_read, s64 offset);
bool write_at(File* file, const void* memory, u32 bytes_to_write, s64 offset);
s64 size(File* file);
bool set_pos(File* file, s64 pos);
bool get_pos(File* file, s64* pos);
} // namespace file
#endif
////////////////////////////////
/// ///
/// Implementations ///
/// ///
////////////////////////////////
////////////////////////////////
/// ///
/// Allocators ///
/// ///
////////////////////////////////
template <usize BUFFER_SIZE>
Temp_Allocator<BUFFER_SIZE>::Temp_Allocator(Allocator* backing_)
: backing(backing_)
, chunk_size(4 * 1024) // 4K - page size
{
current_pointer = physical_start = buffer;
physical_end = physical_start + BUFFER_SIZE;
*static_cast<void**>(physical_start) = 0;
current_pointer = memory::pointer_add(current_pointer, sizeof(void*));
}
template <usize BUFFER_SIZE>
Temp_Allocator<BUFFER_SIZE>::~Temp_Allocator()
{
void* ptr = *static_cast<void**>(buffer);
while (ptr)
{
void* next = *static_cast<void**>(ptr);
backing_->dealloc(ptr);
ptr = next;
}
}
template <usize BUFFER_SIZE>
void*
Temp_Allocator<BUFFER_SIZE>::alloc(usize size, usize align)
{
current_pointer = static_cast<u8*>(memory::align_forward(current_pointer, align));
if (size > static_cast<usize>(physical_end) - current_pointer)
{
usize to_allocate = sizeof(void*) + size + align;
if (to_allocate < chunk_size)
to_allocate = chunk_size;
chunk_size *= 2;
void* ptr = backing_->alloc(to_allocate);
*static_cast<void**>(physical_start) = ptr;
current_pointer = physical_start = static_cast<u8*>(ptr);
*static_cast<void**>(physical_start) = 0;
current_pointer = memory::pointer_add(current_pointer, sizeof(void*));
current_pointer = static_cast<u8*>(memory::align_forward(current_pointer, align));
}
void* result = current_pointer;
current_pointer += size;
return (result);
}
////////////////////////////////
/// ///
/// 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);
}
inline void*
set(void* ptr, u8 value, usize bytes)
{
return memset(ptr, value, bytes);
}
inline void*
zero(void* ptr, usize bytes)
{
return memory::set(ptr, 0, bytes);
}
inline void*
copy(void* dest, const void* src, usize bytes)
{
return memcpy(dest, src, bytes);
}
inline void*
move(void* dest, const void* src, usize bytes)
{
return memmove(dest, src, bytes);
}
inline bool
equals(const void* a, const void* b, usize bytes)
{
return (memcmp(a, b, bytes) == 0);
}
} // namespace memory
//////////////////////////////// ////////////////////////////////
/// /// /// ///
/// Array /// /// Array ///
/// /// /// ///
//////////////////////////////// ////////////////////////////////
template <typename T> template <typename T>
inline inline
Array<T>::Array(Allocator* a, usize count_) Array<T>::Array(Allocator* a, usize count_)
@ -1425,6 +1652,7 @@ grow(Array<T>* a, usize min_capacity)
/// Hash Table /// /// Hash Table ///
/// /// /// ///
//////////////////////////////// ////////////////////////////////
template <typename T> template <typename T>
inline inline
Hash_Table<T>::Hash_Table() Hash_Table<T>::Hash_Table()
@ -1831,148 +2059,10 @@ remove_all(Hash_Table<T>* h, u64 key)
} }
} // namespace multi_hash_table } // 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);
// TODO(bill): Complete hashing functions
// 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
////////////////////////////////
/// ///
/// Time ///
/// ///
////////////////////////////////
struct Time
{
s64 microseconds;
};
extern const Time TIME_ZERO;
// NOTE(bill): namespace time cannot be used for numerous reasons
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 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 ///
/// ///
////////////////////////////////
#if 0
// TODO(bill): still in development
struct File
{
#if defined(GB_SYSTEM_WINDOWS)
HANDLE win32_handle;
Mutex mutex;
char* name; // TODO(bill): uses malloc
b32 is_console;
#else
#error Implement file system
#endif
};
namespace file
{
enum Flag : u32
{
READ = 0x1,
WRITE = 0x2,
};
uintptr fd(const File* file);
bool new_from_fd(File* file, uintptr fd, const char* name);
bool open(File* file, const char* filename, u32 flag, u32 perm);
bool close(File* file);
bool create(File* file, const char* filename, u32 flag);
bool read(File* file, void* buffer, u32 bytes_to_read);
bool write(File* file, const void* memory, u32 bytes_to_write);
bool read_at(File* file, void* buffer, u32 bytes_to_read, s64 offset);
bool write_at(File* file, const void* memory, u32 bytes_to_write, s64 offset);
s64 size(File* file);
bool set_pos(File* file, s64 pos);
bool get_pos(File* file, s64* pos);
} // namespace file
#endif
__GB_NAMESPACE_END __GB_NAMESPACE_END
@ -2483,6 +2573,20 @@ Heap_Allocator::~Heap_Allocator()
#endif #endif
} }
namespace heap_allocator
{
inline Heap_Allocator::Header*
get_header_ptr(const void* ptr)
{
const usize* data = reinterpret_cast<const usize*>(ptr) - 1;
while (*data == GB_HEAP_ALLOCATOR_HEADER_PAD_VALUE)
data--;
return (Heap_Allocator::Header*)(data);
}
} // namespace heap_allocator
void* void*
Heap_Allocator::alloc(usize size, usize align) Heap_Allocator::alloc(usize size, usize align)
{ {
@ -2516,7 +2620,7 @@ Heap_Allocator::dealloc(const void* ptr)
defer (mutex::unlock(&mutex)); defer (mutex::unlock(&mutex));
Header* h = get_header_ptr(ptr); Header* h = heap_allocator::get_header_ptr(ptr);
total_allocated_count -= h->size; total_allocated_count -= h->size;
allocation_count--; allocation_count--;
@ -2530,7 +2634,7 @@ Heap_Allocator::allocated_size(const void* ptr)
mutex::lock(&mutex); mutex::lock(&mutex);
defer (mutex::unlock(&mutex)); defer (mutex::unlock(&mutex));
return get_header_ptr(ptr)->size; return heap_allocator::get_header_ptr(ptr)->size;
} }
s64 s64
@ -2539,17 +2643,6 @@ Heap_Allocator::total_allocated()
return total_allocated_count; return total_allocated_count;
} }
Heap_Allocator::Header*
Heap_Allocator::get_header_ptr(const void* ptr)
{
const usize* data = reinterpret_cast<const usize*>(ptr) - 1;
while (*data == GB_HEAP_ALLOCATOR_HEADER_PAD_VALUE)
data--;
return (Heap_Allocator::Header*)(data);
}
Arena_Allocator::Arena_Allocator(Allocator* backing_, usize size) Arena_Allocator::Arena_Allocator(Allocator* backing_, usize size)
: backing(backing_) : backing(backing_)
, physical_start(nullptr) , physical_start(nullptr)
@ -2598,6 +2691,42 @@ inline s64 Arena_Allocator::allocated_size(const void*) { return -1; }
inline s64 Arena_Allocator::total_allocated() { return total_allocated_count; } inline s64 Arena_Allocator::total_allocated() { return total_allocated_count; }
namespace arena_allocator
{
inline void
clear(Arena_Allocator* 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_allocator
namespace temporary_arena_memory
{
inline Temporary_Arena_Memory
make(Arena_Allocator* arena)
{
Temporary_Arena_Memory tmp = {};
tmp.arena = arena;
tmp.original_count = arena->total_allocated_count;
}
inline void
free(Temporary_Arena_Memory* tmp)
{
if (tmp->arena == nullptr)
return;
GB_ASSERT(tmp->arena->total_allocated() >= 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
//////////////////////////////// ////////////////////////////////
/// /// /// ///
/// String /// /// String ///
@ -3516,6 +3645,22 @@ Time& operator%=(Time& left, Time right) { return (left = left % right); }
/// OS /// /// OS ///
/// /// /// ///
//////////////////////////////// ////////////////////////////////
namespace os
{
GB_FORCE_INLINE u64
time_stamp_counter()
{
#if GB_SYSTEM_WINDOWS
return __rdtsc();
#else
// TODO(bill): Check that rdtsc() works
return rdtsc();
#endif
}
} // namespace os
#if 0 #if 0
namespace file namespace file
{ {