ref: 99faf1ec4a47c5362a6bde552d6097166e2fda16
dir: /processing/src/common/memory.cpp/
/*!
* \copy
* Copyright (c) 2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "memory.h"
WELSVP_NAMESPACE_BEGIN
/////////////////////////////////////////////////////////////////////////////////
void * WelsMalloc( const uint32_t kuiSize, str_t *pTag )
{
const int32_t kiSizeVoidPointer = sizeof( void ** );
const int32_t kiSizeInt32 = sizeof( int32_t );
const int32_t kiAlignedBytes = ALIGNBYTES - 1;
uint8_t* pBuf = (uint8_t *) ::malloc( kuiSize + kiAlignedBytes + kiSizeVoidPointer + kiSizeInt32 );
uint8_t* pAlignedBuf = NULL;
if ( NULL == pBuf )
return NULL;
// to fill zero values
WelsMemset( pBuf, 0, kuiSize + kiAlignedBytes + kiSizeVoidPointer + kiSizeInt32 );
pAlignedBuf = pBuf + kiAlignedBytes + kiSizeVoidPointer + kiSizeInt32;
pAlignedBuf -= WelsCastFromPointer(pAlignedBuf) & kiAlignedBytes;
*( (void **) ( pAlignedBuf - kiSizeVoidPointer ) ) = pBuf;
*( (int32_t *) ( pAlignedBuf - (kiSizeVoidPointer + kiSizeInt32) ) ) = kuiSize;
return (pAlignedBuf);
}
/////////////////////////////////////////////////////////////////////////////
void WelsFree( void* pPointer, str_t *pTag )
{
if( pPointer )
{
::free( *( ( ( void **) pPointer ) - 1 ) );
}
}
/////////////////////////////////////////////////////////////////////////////
void* InternalReallocate( void *pPointer, const uint32_t kuiSize, str_t *pTag )
{
uint32_t iOldSize = 0;
uint8_t* pNew = NULL;
if ( pPointer != NULL )
iOldSize = *( (int32_t*) ( (uint8_t*) pPointer - sizeof( void ** ) - sizeof( int32_t ) ) );
else
return WelsMalloc( kuiSize, pTag );
pNew = (uint8_t*)WelsMalloc( kuiSize, pTag );
if (0 == pNew)
{
if (iOldSize > 0 && kuiSize > 0 && iOldSize >= kuiSize)
return (pPointer);
return 0;
}
else
if( iOldSize > 0 && kuiSize > 0 )
memcpy( pNew, pPointer, ( iOldSize < kuiSize ) ? iOldSize : kuiSize );
else
return 0;
WelsFree( pPointer, pTag );
return (pNew);
}
/////////////////////////////////////////////////////////////////////////////
void* WelsRealloc( void *pPointer, uint32_t *pRealSize, const uint32_t kuiSize, str_t *pTag )
{
const uint32_t kuiOldSize = *pRealSize;
uint32_t kuiNewSize = 0;
void *pLocalPointer = NULL;
if ( kuiOldSize >= kuiSize ) // large enough of original block, so do nothing
return (pPointer);
// new request
kuiNewSize = kuiSize + 15;
kuiNewSize -= (kuiNewSize & 15);
kuiNewSize += 32;
pLocalPointer = InternalReallocate( pPointer, kuiNewSize, pTag );
if ( NULL != pLocalPointer )
{
*pRealSize = kuiNewSize;
return (pLocalPointer);
}
else
{
return NULL;
}
return NULL; // something wrong
}
WELSVP_NAMESPACE_END