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/*
** Copyright 2003-2010, VisualOn, Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
/*******************************************************************************
File: mem_align.c
Content: Memory alloc alignments functions
*******************************************************************************/
#include "mem_align.h"
#ifdef _MSC_VER
#include <stddef.h>
#else
#include <stdint.h>
#endif
/*****************************************************************************
*
* function name: mem_malloc
* description: malloc the alignments memory
* returns: the point of the memory
*
**********************************************************************************/
void *
mem_malloc(VO_MEM_OPERATOR *pMemop, unsigned int size, unsigned char alignment, unsigned int CodecID)
{
int ret;
unsigned char *mem_ptr;
VO_MEM_INFO MemInfo;
if (!alignment) {
MemInfo.Flag = 0;
MemInfo.Size = size + 1;
ret = pMemop->Alloc(CodecID, &MemInfo);
if(ret != 0)
return 0;
mem_ptr = (unsigned char *)MemInfo.VBuffer;
pMemop->Set(CodecID, mem_ptr, 0, size + 1);
*mem_ptr = (unsigned char)1;
return ((void *)(mem_ptr+1));
} else {
unsigned char *tmp;
MemInfo.Flag = 0;
MemInfo.Size = size + alignment;
ret = pMemop->Alloc(CodecID, &MemInfo);
if(ret != 0)
return 0;
tmp = (unsigned char *)MemInfo.VBuffer;
pMemop->Set(CodecID, tmp, 0, size + alignment);
mem_ptr =
(unsigned char *) ((intptr_t) (tmp + alignment - 1) &
(~((intptr_t) (alignment - 1))));
if (mem_ptr == tmp)
mem_ptr += alignment;
*(mem_ptr - 1) = (unsigned char) (mem_ptr - tmp);
return ((void *)mem_ptr);
}
return(0);
}
/*****************************************************************************
*
* function name: mem_free
* description: free the memory
*
*******************************************************************************/
void
mem_free(VO_MEM_OPERATOR *pMemop, void *mem_ptr, unsigned int CodecID)
{
unsigned char *ptr;
if (mem_ptr == 0)
return;
ptr = mem_ptr;
ptr -= *(ptr - 1);
pMemop->Free(CodecID, ptr);
}
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