obs-StreamFX/source/util-memory.cpp

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/*
* Modern effects for a modern Streamer
* Copyright (C) 2017 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "util-memory.h"
#include <cstdlib>
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void* util::malloc_aligned(size_t align, size_t size) {
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// Ensure that we have space for the pointer and the data.
size_t asize = aligned_offset(align, size + sizeof(void*));
// Allocate memory and store integer representation of pointer.
void* ptr = malloc(asize);
// Calculate actual aligned position
intptr_t ptr_off = aligned_offset(align, reinterpret_cast<size_t>(ptr)+sizeof(void*));
// Store actual pointer at ptr_off - sizeof(void*).
*reinterpret_cast<intptr_t*>(ptr_off - sizeof(void*)) = reinterpret_cast<intptr_t>(ptr);
// Return aligned pointer
return reinterpret_cast<void*>(ptr_off);
}
void util::free_aligned(void* mem) {
void* ptr = reinterpret_cast<void*>(*reinterpret_cast<intptr_t*>(static_cast<char*>(mem)-sizeof(void*)));
free(ptr);
}