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BlobRef.cpp
// This may look like C code, but it is really -*- C++ -*-
//
// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002, 2004
//
// Copyright @ 2014 ImageMagick Studio LLC, a non-profit organization
// dedicated to making software imaging solutions freely available.
//
// Implementation of Blob
//
#define MAGICKCORE_IMPLEMENTATION 1
#define MAGICK_PLUSPLUS_IMPLEMENTATION 1
#include "Magick++/Include.h"
#include "Magick++/BlobRef.h"
#include "Magick++/Exception.h"
#include "Magick++/Thread.h"
#include <string.h>
Magick::BlobRef::BlobRef(const void* data_,const size_t length_)
: allocator(Magick::Blob::NewAllocator),
length(length_),
data((void*) NULL),
_mutexLock(),
_refCount(1)
{
if (data_ != (const void*) NULL)
{
data=new unsigned char[length_];
memcpy(data,data_,length_);
}
}
Magick::BlobRef::~BlobRef(void)
{
if (allocator == Magick::Blob::NewAllocator)
{
delete[] static_cast<unsigned char*>(data);
data=(void *) NULL;
}
else if (allocator == Magick::Blob::MallocAllocator)
data=(void *) RelinquishMagickMemory(data);
}
size_t Magick::BlobRef::decrease()
{
size_t
count;
_mutexLock.lock();
if (_refCount == 0)
{
_mutexLock.unlock();
throwExceptionExplicit(MagickCore::OptionError,
"Invalid call to decrease");
return(0);
}
count=--_refCount;
_mutexLock.unlock();
return(count);
}
void Magick::BlobRef::increase()
{
_mutexLock.lock();
_refCount++;
_mutexLock.unlock();
}