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98 lines
3.2 KiB
98 lines
3.2 KiB
/* |
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Copyright (c) 2012, Broadcom Europe Ltd |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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* Neither the name of the copyright holder nor the |
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names of its contributors may be used to endorse or promote products |
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derived from this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY |
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/*============================================================================= |
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VideoCore OS Abstraction Layer - memory alloc implementation |
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=============================================================================*/ |
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#include "interface/vcos/vcos.h" |
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#ifndef _vcos_platform_malloc |
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#include <stdlib.h> |
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#define _vcos_platform_malloc malloc |
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#define _vcos_platform_free free |
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#endif |
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typedef struct malloc_header_s { |
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uint32_t guardword; |
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uint32_t size; |
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const char *description; |
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void *ptr; |
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} MALLOC_HEADER_T; |
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#define MIN_ALIGN sizeof(MALLOC_HEADER_T) |
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#define GUARDWORDHEAP 0xa55a5aa5 |
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void *vcos_generic_mem_alloc_aligned(VCOS_UNSIGNED size, VCOS_UNSIGNED align, const char *desc) |
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{ |
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int local_align = align == 0 ? 1 : align; |
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int required_size = size + local_align + sizeof(MALLOC_HEADER_T); |
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void *ptr = _vcos_platform_malloc(required_size); |
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void *ret = NULL; |
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MALLOC_HEADER_T *h; |
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if (ptr) |
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{ |
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ret = (void *)VCOS_ALIGN_UP(((char *)ptr)+sizeof(MALLOC_HEADER_T), local_align); |
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h = ((MALLOC_HEADER_T *)ret)-1; |
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h->size = size; |
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h->description = desc; |
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h->guardword = GUARDWORDHEAP; |
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h->ptr = ptr; |
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} |
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return ret; |
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} |
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void *vcos_generic_mem_alloc(VCOS_UNSIGNED size, const char *desc) |
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{ |
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return vcos_generic_mem_alloc_aligned(size,MIN_ALIGN,desc); |
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} |
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void *vcos_generic_mem_calloc(VCOS_UNSIGNED count, VCOS_UNSIGNED sz, const char *desc) |
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{ |
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uint32_t size = count*sz; |
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void *ptr = vcos_generic_mem_alloc_aligned(size,MIN_ALIGN,desc); |
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if (ptr) |
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{ |
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memset(ptr, 0, size); |
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} |
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return ptr; |
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} |
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void vcos_generic_mem_free(void *ptr) |
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{ |
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MALLOC_HEADER_T *h; |
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if (! ptr) return; |
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h = ((MALLOC_HEADER_T *)ptr)-1; |
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vcos_assert(h->guardword == GUARDWORDHEAP); |
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_vcos_platform_free(h->ptr); |
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} |
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