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/*****************************************************************************/
// Copyright 2006 Adobe Systems Incorporated
// All Rights Reserved.
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in
// accordance with the terms of the Adobe license agreement accompanying it.
/*****************************************************************************/
/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_memory.cpp#1 $ */
/* $DateTime: 2012/05/30 13:28:51 $ */
/* $Change: 832332 $ */
/* $Author: tknoll $ */
/*****************************************************************************/
#include "dng_memory.h"
#include "dng_bottlenecks.h"
#include "dng_exceptions.h"
#include "dng_safe_arithmetic.h"
/*****************************************************************************/
dng_memory_data::dng_memory_data ()
: fBuffer (NULL)
{
}
/*****************************************************************************/
dng_memory_data::dng_memory_data (uint32 size)
: fBuffer (NULL)
{
Allocate (size);
}
/*****************************************************************************/
dng_memory_data::dng_memory_data (uint32 count, std::size_t elementSize)
: fBuffer (NULL)
{
Allocate (count, elementSize);
}
/*****************************************************************************/
dng_memory_data::~dng_memory_data ()
{
Clear ();
}
/*****************************************************************************/
void dng_memory_data::Allocate (uint32 size)
{
Clear ();
if (size)
{
fBuffer = (char*)malloc (size);
if (!fBuffer)
{
ThrowMemoryFull ();
}
}
}
/*****************************************************************************/
void dng_memory_data::Allocate (uint32 count, std::size_t elementSize)
{
// Convert elementSize to a uint32.
const uint32 elementSizeAsUint32 = static_cast<uint32> (elementSize);
if (static_cast<std::size_t> (elementSizeAsUint32) != elementSize)
{
ThrowMemoryFull();
}
// Compute required number of bytes and allocate memory.
uint32 numBytes;
if (!SafeUint32Mult(count, elementSizeAsUint32, &numBytes))
{
ThrowMemoryFull();
}
Allocate(numBytes);
}
void dng_memory_data::Clear ()
{
if (fBuffer)
{
free (fBuffer);
fBuffer = NULL;
}
}
/*****************************************************************************/
dng_memory_block * dng_memory_block::Clone (dng_memory_allocator &allocator) const
{
uint32 size = LogicalSize ();
dng_memory_block * result = allocator.Allocate (size);
DoCopyBytes (Buffer (), result->Buffer (), size);
return result;
}
/*****************************************************************************/
class dng_malloc_block : public dng_memory_block
{
private:
void *fMalloc;
public:
dng_malloc_block (uint32 logicalSize);
virtual ~dng_malloc_block ();
private:
// Hidden copy constructor and assignment operator.
dng_malloc_block (const dng_malloc_block &block);
dng_malloc_block & operator= (const dng_malloc_block &block);
};
/*****************************************************************************/
dng_malloc_block::dng_malloc_block (uint32 logicalSize)
: dng_memory_block (logicalSize)
, fMalloc (NULL)
{
#if qLinux && !defined(__ARM_NEON) && !defined(__mips__)
int err = ::posix_memalign( (void **) &fMalloc, 16, (size_t) PhysicalSize() );
if (err)
{
ThrowMemoryFull ();
}
#else
fMalloc = (char*)malloc (PhysicalSize ());
if (!fMalloc)
{
ThrowMemoryFull ();
}
#endif
SetBuffer (fMalloc);
}
/*****************************************************************************/
dng_malloc_block::~dng_malloc_block ()
{
if (fMalloc)
{
free (fMalloc);
}
}
/*****************************************************************************/
dng_memory_block * dng_memory_allocator::Allocate (uint32 size)
{
dng_memory_block *result = new dng_malloc_block (size);
if (!result)
{
ThrowMemoryFull ();
}
return result;
}
/*****************************************************************************/
dng_memory_allocator gDefaultDNGMemoryAllocator;
/*****************************************************************************/
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