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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkMultiThreader.h"
#include "itkTimeProbe.h"
#include "itkConfigure.h"
#include "itksys/SystemTools.hxx"
typedef struct {
int numberOfLoop;
itk::MutexLock::Pointer sharedMutex;
} SharedThreadData;
void* ThreadFunction(void *ptr)
{
// Retrieve shared thread data and user data
itk::MultiThreader::ThreadInfoStruct* threadInfo =
static_cast<itk::MultiThreader::ThreadInfoStruct*>(ptr);
itk::ThreadIdType localthreadId = threadInfo->ThreadID;
SharedThreadData* localThreadData =
static_cast<SharedThreadData*>(threadInfo->UserData);
int localnumberOfLoop = localThreadData->numberOfLoop;
itk::MutexLock::Pointer localMutex = localThreadData->sharedMutex;
// Loop
for (int i = 0; i < localnumberOfLoop; ++i)
{
localMutex->Lock();
std::cerr << "Thread #" << localthreadId << ":: counter = " << i << std::endl;
localMutex->Unlock();
}
localMutex->Lock();
std::cerr << "Thread #" << localthreadId << " is done." << std::endl;
localMutex->Unlock();
return ITK_NULLPTR;
}
#if !defined(ITK_USE_PTHREADS)
int itkSpawnThreadTest(int, char* [])
{
#else
int itkSpawnThreadTest(int argc, char* argv[])
{
int loop = 100;
if( argc > 1 )
{
const int nt = atoi( argv[1] );
if(nt > 1)
{
loop = nt;
}
}
itk::MultiThreader::Pointer threader = itk::MultiThreader::New();
itk::MutexLock::Pointer mutexlock = itk::MutexLock::New();
if(threader.IsNull() || mutexlock.IsNull() )
{
return EXIT_FAILURE;
}
SharedThreadData threadData;
threadData.numberOfLoop = loop;
threadData.sharedMutex = mutexlock;
int id1 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
int id2 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
int id3 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
int id4 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
int id5 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
int id6 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
int id7 = threader->SpawnThread((itk::ThreadFunctionType) &ThreadFunction, &threadData);
for(int i=0; i<threadData.numberOfLoop; ++i)
{
mutexlock->Lock();
std::cerr << "Main Thread:: counter = " << i << std::endl;
mutexlock->Unlock();
}
mutexlock->Lock();
std::cerr << "Main Thread is done." << std::endl;
mutexlock->Unlock();
// wait for the threads
threader->TerminateThread(id1);
threader->TerminateThread(id2);
threader->TerminateThread(id3);
threader->TerminateThread(id4);
threader->TerminateThread(id5);
threader->TerminateThread(id6);
threader->TerminateThread(id7);
std::cerr << "All theads are stopped ...." << std::endl;
#endif
return EXIT_SUCCESS;
}
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