pcsx2/common/AlignedMalloc.cpp

/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2010  PCSX2 Dev Team
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

// 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 <stdlib.h>

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