pcsx2/common/AlignedMalloc.cpp

// SPDX-FileCopyrightText: 2002-2023 PCSX2 Dev Team
// SPDX-License-Identifier: LGPL-3.0+

// This module contains implementations of _aligned_malloc for platforms that don't have
// it built into their CRT/libc.

#if !defined(_WIN32)

#include "common/AlignedMalloc.h"
#include "common/Assertions.h"

#include <algorithm>
#include <cstdlib>

void* _aligned_malloc(size_t size, size_t align)
{
	pxAssert(align < 0x10000);
#if defined(__USE_ISOC11) && !defined(ASAN_WORKAROUND) // not supported yet on gcc 4.9
	return aligned_alloc(align, size);
#else
#ifdef __APPLE__
	// MacOS has a bug where posix_memalign is ridiculously slow on unaligned sizes
	// This especially bad on M1s for some reason
	size = (size + align - 1) & ~(align - 1);
#endif
	void* result = 0;
	posix_memalign(&result, align, size);
	return result;
#endif
}

void* pcsx2_aligned_realloc(void* handle, size_t new_size, size_t align, size_t old_size)
{
	pxAssert(align < 0x10000);

	void* newbuf = _aligned_malloc(new_size, align);

	if (newbuf != NULL && handle != NULL)
	{
		memcpy(newbuf, handle, std::min(old_size, new_size));
		_aligned_free(handle);
	}
	return newbuf;
}

__fi void _aligned_free(void* pmem)
{
	free(pmem);
}
#endif