157 lines
3.9 KiB
C++
157 lines
3.9 KiB
C++
///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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//-----------------------------------------------------------------------------
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//
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// class Attribute
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//
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//-----------------------------------------------------------------------------
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#include <ImfAttribute.h>
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#include "IlmThreadMutex.h"
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#include "Iex.h"
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#include <string.h>
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#include <map>
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namespace Imf {
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using IlmThread::Mutex;
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using IlmThread::Lock;
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Attribute::Attribute () {}
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Attribute::~Attribute () {}
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namespace {
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struct NameCompare: std::binary_function <const char *, const char *, bool>
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{
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bool
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operator () (const char *x, const char *y) const
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{
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return strcmp (x, y) < 0;
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}
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};
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typedef Attribute* (*Constructor)();
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typedef std::map <const char *, Constructor, NameCompare> TypeMap;
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class LockedTypeMap: public TypeMap
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{
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public:
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Mutex mutex;
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};
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LockedTypeMap &
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typeMap ()
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{
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static Mutex criticalSection;
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Lock lock (criticalSection);
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static LockedTypeMap* typeMap = 0;
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if (typeMap == 0)
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typeMap = new LockedTypeMap ();
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return *typeMap;
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}
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} // namespace
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bool
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Attribute::knownType (const char typeName[])
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{
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LockedTypeMap& tMap = typeMap();
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Lock lock (tMap.mutex);
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return tMap.find (typeName) != tMap.end();
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}
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void
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Attribute::registerAttributeType (const char typeName[],
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Attribute *(*newAttribute)())
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{
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LockedTypeMap& tMap = typeMap();
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Lock lock (tMap.mutex);
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if (tMap.find (typeName) != tMap.end())
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THROW (Iex::ArgExc, "Cannot register image file attribute "
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"type \"" << typeName << "\". "
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"The type has already been registered.");
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tMap.insert (TypeMap::value_type (typeName, newAttribute));
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}
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void
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Attribute::unRegisterAttributeType (const char typeName[])
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{
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LockedTypeMap& tMap = typeMap();
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Lock lock (tMap.mutex);
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tMap.erase (typeName);
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}
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Attribute *
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Attribute::newAttribute (const char typeName[])
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{
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LockedTypeMap& tMap = typeMap();
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Lock lock (tMap.mutex);
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TypeMap::const_iterator i = tMap.find (typeName);
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if (i == tMap.end())
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THROW (Iex::ArgExc, "Cannot create image file attribute of "
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"unknown type \"" << typeName << "\".");
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return (i->second)();
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}
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} // namespace Imf
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