///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// 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.
// * Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// 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
// OWNER 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.
//
///////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
//
// class Attribute
//
//-----------------------------------------------------------------------------
#include <ImfAttribute.h>
#include "IlmThreadMutex.h"
#include "Iex.h"
#include <string.h>
#include <map>
namespace Imf {
using IlmThread::Mutex;
using IlmThread::Lock;
Attribute::Attribute () {}
Attribute::~Attribute () {}
namespace {
struct NameCompare: std::binary_function <const char *, const char *, bool>
{
bool
operator () (const char *x, const char *y) const
{
return strcmp (x, y) < 0;
}
};
typedef Attribute* (*Constructor)();
typedef std::map <const char *, Constructor, NameCompare> TypeMap;
class LockedTypeMap: public TypeMap
{
public:
Mutex mutex;
};
LockedTypeMap &
typeMap ()
{
static Mutex criticalSection;
Lock lock (criticalSection);
static LockedTypeMap* typeMap = 0;
if (typeMap == 0)
typeMap = new LockedTypeMap ();
return *typeMap;
}
} // namespace
bool
Attribute::knownType (const char typeName[])
{
LockedTypeMap& tMap = typeMap();
Lock lock (tMap.mutex);
return tMap.find (typeName) != tMap.end();
}
void
Attribute::registerAttributeType (const char typeName[],
Attribute *(*newAttribute)())
{
LockedTypeMap& tMap = typeMap();
Lock lock (tMap.mutex);
if (tMap.find (typeName) != tMap.end())
THROW (Iex::ArgExc, "Cannot register image file attribute "
"type \"" << typeName << "\". "
"The type has already been registered.");
tMap.insert (TypeMap::value_type (typeName, newAttribute));
}
void
Attribute::unRegisterAttributeType (const char typeName[])
{
LockedTypeMap& tMap = typeMap();
Lock lock (tMap.mutex);
tMap.erase (typeName);
}
Attribute *
Attribute::newAttribute (const char typeName[])
{
LockedTypeMap& tMap = typeMap();
Lock lock (tMap.mutex);
TypeMap::const_iterator i = tMap.find (typeName);
if (i == tMap.end())
THROW (Iex::ArgExc, "Cannot create image file attribute of "
"unknown type \"" << typeName << "\".");
return (i->second)();
}
} // namespace Imf