mirror of
https://github.com/ZDoom/Raze.git
synced 2024-11-15 17:01:28 +00:00
101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/*
|
|
** Render memory allocation
|
|
** Copyright (c) 2016-2020 Magnus Norddahl
|
|
**
|
|
** This software is provided 'as-is', without any express or implied
|
|
** warranty. In no event will the authors be held liable for any damages
|
|
** arising from the use of this software.
|
|
**
|
|
** Permission is granted to anyone to use this software for any purpose,
|
|
** including commercial applications, and to alter it and redistribute it
|
|
** freely, subject to the following restrictions:
|
|
**
|
|
** 1. The origin of this software must not be misrepresented; you must not
|
|
** claim that you wrote the original software. If you use this software
|
|
** in a product, an acknowledgment in the product documentation would be
|
|
** appreciated but is not required.
|
|
** 2. Altered source versions must be plainly marked as such, and must not be
|
|
** misrepresented as being the original software.
|
|
** 3. This notice may not be removed or altered from any source distribution.
|
|
**
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "r_memory.h"
|
|
#include <stdlib.h>
|
|
|
|
void *RenderMemory::AllocBytes(int size)
|
|
{
|
|
size = (size + 15) / 16 * 16; // 16-byte align
|
|
|
|
if (UsedBlocks.empty() || UsedBlocks.back()->Position + size > BlockSize)
|
|
{
|
|
if (!FreeBlocks.empty())
|
|
{
|
|
auto block = std::move(FreeBlocks.back());
|
|
block->Position = 0;
|
|
FreeBlocks.pop_back();
|
|
UsedBlocks.push_back(std::move(block));
|
|
}
|
|
else
|
|
{
|
|
UsedBlocks.push_back(std::unique_ptr<MemoryBlock>(new MemoryBlock()));
|
|
}
|
|
}
|
|
|
|
auto &block = UsedBlocks.back();
|
|
void *data = block->Data + block->Position;
|
|
block->Position += size;
|
|
|
|
return data;
|
|
}
|
|
|
|
void RenderMemory::Clear()
|
|
{
|
|
while (!UsedBlocks.empty())
|
|
{
|
|
auto block = std::move(UsedBlocks.back());
|
|
UsedBlocks.pop_back();
|
|
FreeBlocks.push_back(std::move(block));
|
|
}
|
|
}
|
|
|
|
static void* Aligned_Alloc(size_t alignment, size_t size)
|
|
{
|
|
void* ptr;
|
|
#if defined (_MSC_VER) || defined (__MINGW32__)
|
|
ptr = _aligned_malloc(size, alignment);
|
|
if (!ptr)
|
|
throw std::bad_alloc();
|
|
#else
|
|
// posix_memalign required alignment to be a min of sizeof(void *)
|
|
if (alignment < sizeof(void*))
|
|
alignment = sizeof(void*);
|
|
|
|
if (posix_memalign((void**)&ptr, alignment, size))
|
|
throw std::bad_alloc();
|
|
#endif
|
|
return ptr;
|
|
}
|
|
|
|
static void Aligned_Free(void* ptr)
|
|
{
|
|
if (ptr)
|
|
{
|
|
#if defined _MSC_VER
|
|
_aligned_free(ptr);
|
|
#else
|
|
free(ptr);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
RenderMemory::MemoryBlock::MemoryBlock() : Data(static_cast<uint8_t*>(Aligned_Alloc(16, BlockSize))), Position(0)
|
|
{
|
|
}
|
|
|
|
RenderMemory::MemoryBlock::~MemoryBlock()
|
|
{
|
|
Aligned_Free(Data);
|
|
}
|