/usr/include/gdal/cpl_worker_thread_pool.h is in libgdal-dev 2.2.3+dfsg-2.
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* $Id: cpl_worker_thread_pool.h 37003 2016-12-23 14:54:07Z goatbar $
*
* Project: CPL - Common Portability Library
* Purpose: CPL worker thread pool
* Author: Even Rouault, <even dot rouault at spatialys dot com>
*
**********************************************************************
* Copyright (c) 2015, Even Rouault, <even dot rouault at spatialys dot com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#ifndef CPL_WORKER_THREAD_POOL_H_INCLUDED_
#define CPL_WORKER_THREAD_POOL_H_INCLUDED_
#include "cpl_multiproc.h"
#include "cpl_list.h"
#include <vector>
/**
* \file cpl_worker_thread_pool.h
*
* Class to manage a pool of worker threads.
* @since GDAL 2.1
*/
#ifndef DOXYGEN_SKIP
class CPLWorkerThreadPool;
typedef struct
{
CPLThreadFunc pfnFunc;
void *pData;
} CPLWorkerThreadJob;
typedef struct
{
CPLThreadFunc pfnInitFunc;
void *pInitData;
CPLWorkerThreadPool *poTP;
CPLJoinableThread *hThread;
int bMarkedAsWaiting;
// CPLWorkerThreadJob *psNextJob;
CPLMutex *hMutex;
CPLCond *hCond;
} CPLWorkerThread;
typedef enum
{
CPLWTS_OK,
CPLWTS_STOP,
CPLWTS_ERROR
} CPLWorkerThreadState;
#endif // ndef DOXYGEN_SKIP
/** Pool of worker threads */
class CPL_DLL CPLWorkerThreadPool
{
std::vector<CPLWorkerThread> aWT;
CPLCond* hCond;
CPLMutex* hMutex;
volatile CPLWorkerThreadState eState;
CPLList* psJobQueue;
volatile int nPendingJobs;
CPLList* psWaitingWorkerThreadsList;
int nWaitingWorkerThreads;
static void WorkerThreadFunction(void* user_data);
void DeclareJobFinished();
CPLWorkerThreadJob* GetNextJob(CPLWorkerThread* psWorkerThread);
public:
CPLWorkerThreadPool();
~CPLWorkerThreadPool();
bool Setup(int nThreads,
CPLThreadFunc pfnInitFunc,
void** pasInitData);
bool SubmitJob(CPLThreadFunc pfnFunc, void* pData);
bool SubmitJobs(CPLThreadFunc pfnFunc, const std::vector<void*>& apData);
void WaitCompletion(int nMaxRemainingJobs = 0);
/** Return the number of threads setup */
int GetThreadCount() const { return (int)aWT.size(); }
};
#endif // CPL_WORKER_THREAD_POOL_H_INCLUDED_
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