147 lines
3.0 KiB
C
147 lines
3.0 KiB
C
/*
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* Copyright (c) 2013 Hugh Bailey <obs.jim@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "base.h"
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#include "bmem.h"
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/*
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* NOTE: totally jacked the mem alignment trick from ffmpeg, credit to them:
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* http://www.ffmpeg.org/
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*/
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#define ALIGNMENT 32
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/* TODO: use memalign for non-windows systems */
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#if defined(_WIN32)
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#define ALIGNED_MALLOC 1
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#else
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#define ALIGNMENT_HACK 1
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#endif
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static void *a_malloc(size_t size)
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{
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#ifdef ALIGNED_MALLOC
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return _aligned_malloc(size, ALIGNMENT);
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#elif ALIGNMENT_HACK
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void *ptr = NULL;
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long diff;
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ptr = malloc(size + ALIGNMENT);
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diff = ((~(long)ptr) & (ALIGNMENT - 1)) + 1;
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ptr = (char *)ptr + diff;
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((char *)ptr)[-1] = (char)diff;
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return ptr;
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#else
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return malloc(size);
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#endif
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}
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static void *a_realloc(void *ptr, size_t size)
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{
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#ifdef ALIGNED_MALLOC
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return _aligned_realloc(ptr, size, ALIGNMENT);
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#elif ALIGNMENT_HACK
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long diff;
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if (!ptr)
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return a_malloc(size);
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diff = ((char *)ptr)[-1];
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ptr = realloc((char*)ptr - diff, size + diff);
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if (ptr)
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ptr = (char *)ptr + diff;
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return ptr;
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#else
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return realloc(ptr, size);
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#endif
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}
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static void a_free(void *ptr)
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{
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#ifdef ALIGNED_MALLOC
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_aligned_free(ptr);
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#elif ALIGNMENT_HACK
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if (ptr)
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free((char *)ptr - ((char*)ptr)[-1]);
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#else
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free(ptr);
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#endif
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}
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static struct base_allocator alloc = {a_malloc, a_realloc, a_free};
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static uint64_t num_allocs = 0;
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void base_set_allocator(struct base_allocator *defs)
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{
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memcpy(&alloc, defs, sizeof(struct base_allocator));
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}
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void *bmalloc(size_t size)
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{
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void *ptr = alloc.malloc(size);
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if (!ptr && !size)
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ptr = alloc.malloc(1);
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if (!ptr)
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bcrash("Out of memory while trying to allocate %lu bytes",
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(unsigned long)size);
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num_allocs++;
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return ptr;
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}
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void *brealloc(void *ptr, size_t size)
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{
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if (!ptr)
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num_allocs++;
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ptr = alloc.realloc(ptr, size);
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if (!ptr && !size)
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ptr = alloc.realloc(ptr, 1);
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if (!ptr)
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bcrash("Out of memory while trying to allocate %lu bytes",
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(unsigned long)size);
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return ptr;
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}
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void bfree(void *ptr)
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{
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if (ptr)
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num_allocs--;
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alloc.free(ptr);
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}
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uint64_t bnum_allocs(void)
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{
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return num_allocs;
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}
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int base_get_alignment(void)
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{
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return ALIGNMENT;
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}
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void *bmemdup(const void *ptr, size_t size)
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{
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void *out = bmalloc(size);
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if (size)
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memcpy(out, ptr, size);
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return out;
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}
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