61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/*
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* Modern effects for a modern Streamer
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* Copyright (C) 2017 Michael Fabian Dirks
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "util-memory.h"
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#include <cstdlib>
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#define USE_STD_ALLOC_FREE
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void* util::malloc_aligned(size_t align, size_t size) {
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#ifdef USE_STD_ALLOC_FREE
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#if defined(_MSC_VER)
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return _aligned_malloc(size, align);
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#else
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return aligned_malloc(align, size);
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#endif
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#else
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// Ensure that we have space for the pointer and the data.
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size_t asize = aligned_offset(align, size + (sizeof(void*) * 2));
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// Allocate memory and store integer representation of pointer.
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void* ptr = malloc(asize);
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// Calculate actual aligned position
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intptr_t ptr_off = aligned_offset(align, reinterpret_cast<size_t>(ptr) + sizeof(void*));
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// Store actual pointer at ptr_off - sizeof(void*).
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*reinterpret_cast<intptr_t*>(ptr_off - sizeof(void*)) = reinterpret_cast<intptr_t>(ptr);
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// Return aligned pointer
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return reinterpret_cast<void*>(ptr_off);
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#endif
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}
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void util::free_aligned(void* mem) {
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#ifdef USE_STD_ALLOC_FREE
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#if defined(_MSC_VER)
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_aligned_free(mem);
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#else
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free(mem);
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#endif
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#else
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void* ptr = reinterpret_cast<void*>(*reinterpret_cast<intptr_t*>(static_cast<char*>(mem) - sizeof(void*)));
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free(ptr);
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#endif
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}
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