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/*
* Copyright (C) 2011 University of Szeged
* Copyright (C) 2011 Gabor Loki <loki@webkit.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 UNIVERSITY OF SZEGED ``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 UNIVERSITY OF SZEGED 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.
*/
#ifndef ParallelJobs_h
#define ParallelJobs_h
#include <wtf/Assertions.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
// Usage:
//
// // Initialize parallel jobs
// ParallelJobs<TypeOfParameter> parallelJobs(&worker [, requestedNumberOfJobs]);
//
// // Fill the parameter array
// for(i = 0; i < parallelJobs.numberOfJobs(); ++i) {
// TypeOfParameter& params = parallelJobs.parameter(i);
// params.attr1 = localVars ...
// ...
// }
//
// // Execute parallel jobs
// parallelJobs.execute();
//
#if ENABLE(THREADING_GENERIC)
#include <wtf/ParallelJobsGeneric.h>
#elif ENABLE(THREADING_OPENMP)
#include <wtf/ParallelJobsOpenMP.h>
#elif ENABLE(THREADING_LIBDISPATCH)
#include <wtf/ParallelJobsLibdispatch.h>
#else
#error "No parallel processing API for ParallelJobs"
#endif
namespace WTF {
template<typename Type>
class ParallelJobs {
WTF_MAKE_FAST_ALLOCATED;
public:
typedef void (*WorkerFunction)(Type*);
ParallelJobs(WorkerFunction func, int requestedJobNumber) :
m_parallelEnvironment(reinterpret_cast<ParallelEnvironment::ThreadFunction>(func), sizeof(Type), requestedJobNumber)
{
m_parameters.grow(m_parallelEnvironment.numberOfJobs());
ASSERT(numberOfJobs() == m_parameters.size());
}
size_t numberOfJobs()
{
return m_parameters.size();
}
Type& parameter(size_t i)
{
return m_parameters[i];
}
void execute()
{
m_parallelEnvironment.execute(reinterpret_cast<unsigned char*>(m_parameters.data()));
}
private:
ParallelEnvironment m_parallelEnvironment;
Vector<Type> m_parameters;
};
} // namespace WTF
using WTF::ParallelJobs;
#endif // ParallelJobs_h
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