119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
|
#ifndef __TPOOLEDDISPATCH_H__
|
||
|
|
#define __TPOOLEDDISPATCH_H__
|
||
|
|
/*---------------------------------------------------------------------------
|
||
|
|
File: TPooledDispatch.h
|
||
|
|
|
||
|
|
Comments: TJobDispatcher implements a thread pool to execute jobs. Jobs are
|
||
|
|
executed on a FIFO basis. This dispatcher does not provide any support for
|
||
|
|
job scheduling, only multithreaded dispatch of jobs.
|
||
|
|
|
||
|
|
(c) Copyright 1999, Mission Critical Software, Inc., All Rights Reserved
|
||
|
|
Proprietary and confidential to Mission Critical Software, Inc.
|
||
|
|
|
||
|
|
REVISION LOG ENTRY
|
||
|
|
Revision By: Christy Boles
|
||
|
|
Revised on 02/19/99 16:35:54
|
||
|
|
|
||
|
|
---------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#include "Common.hpp"
|
||
|
|
#include "TNode.hpp"
|
||
|
|
#include "TSync.hpp"
|
||
|
|
|
||
|
|
|
||
|
|
class Job : public TNode
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
enum JobStatus { JobStatusUninitialized, JobStatusWaiting, JobStatusRunning, JobStatusFinished };
|
||
|
|
private:
|
||
|
|
LPTHREAD_START_ROUTINE m_pStartRoutine;
|
||
|
|
LPVOID m_pArgs;
|
||
|
|
JobStatus m_Status;
|
||
|
|
DWORD m_ThreadID;
|
||
|
|
time_t m_timeStarted;
|
||
|
|
time_t m_timeEnded;
|
||
|
|
int m_result;
|
||
|
|
public:
|
||
|
|
|
||
|
|
Job()
|
||
|
|
{
|
||
|
|
m_pStartRoutine = NULL;
|
||
|
|
m_pArgs = NULL;
|
||
|
|
m_Status = JobStatusUninitialized;
|
||
|
|
m_ThreadID = 0;
|
||
|
|
m_timeStarted = 0;
|
||
|
|
m_timeEnded = 0;
|
||
|
|
m_result = 0;
|
||
|
|
}
|
||
|
|
~Job() {};
|
||
|
|
void SetEntryPoint(LPTHREAD_START_ROUTINE pStart, LPVOID pArg)
|
||
|
|
{
|
||
|
|
MCSASSERT(m_Status == JobStatusUninitialized || m_Status == JobStatusFinished );
|
||
|
|
MCSASSERT(pStart);
|
||
|
|
|
||
|
|
m_pStartRoutine = pStart;
|
||
|
|
m_pArgs = pArg;
|
||
|
|
m_Status = JobStatusWaiting;
|
||
|
|
}
|
||
|
|
|
||
|
|
int Run();
|
||
|
|
|
||
|
|
// int GetElapsedTime() { return m_timeEnded - m_timeStarted; }
|
||
|
|
time_t GetElapsedTime() { return m_timeEnded - m_timeStarted; }
|
||
|
|
int GetResult() { return m_result; }
|
||
|
|
JobStatus GetStatus() { return m_Status; }
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
class JobList : public TNodeList
|
||
|
|
{
|
||
|
|
TCriticalSection m_cs;
|
||
|
|
|
||
|
|
public:
|
||
|
|
~JobList() { DeleteAllListItems(Job); }
|
||
|
|
Job * AddJob(LPTHREAD_START_ROUTINE pfnStart, void * arg) { Job * pJob = new Job; pJob->SetEntryPoint(pfnStart,arg);
|
||
|
|
m_cs.Enter(); InsertBottom(pJob); m_cs.Leave(); return pJob; }
|
||
|
|
void RemoveJob(Job * pJob) { m_cs.Enter(); Remove(pJob); m_cs.Leave(); }
|
||
|
|
Job * GetFirstJob() { m_cs.Enter(); Job * pJob = (Job *)Head(); if ( pJob ) Remove(pJob); m_cs.Leave(); return pJob; }
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
class TJobDispatcher
|
||
|
|
{
|
||
|
|
DWORD m_numThreads;
|
||
|
|
JobList m_JobsWaiting;
|
||
|
|
JobList m_JobsInProgress;
|
||
|
|
TSemaphoreNamed m_sem;
|
||
|
|
TCriticalSection m_cs;
|
||
|
|
DWORD m_numActiveThreads;
|
||
|
|
BOOL m_Aborting;
|
||
|
|
public:
|
||
|
|
TJobDispatcher(DWORD maxThreads = 10) { InitThreadPool(maxThreads); m_Aborting = FALSE;}
|
||
|
|
~TJobDispatcher() { WaitForCompletion(); ShutdownThreads(); }
|
||
|
|
|
||
|
|
// These are called by the client
|
||
|
|
Job * SubmitJob(LPTHREAD_START_ROUTINE pStart,LPVOID pArg)
|
||
|
|
{
|
||
|
|
// Job * pJob = m_JobsWaiting.AddJob(pStart,pArg);
|
||
|
|
m_JobsWaiting.AddJob(pStart,pArg);
|
||
|
|
m_sem.Release(1);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void WaitForCompletion();
|
||
|
|
int UnfinishedJobs();
|
||
|
|
|
||
|
|
// These functions are called by the threads - clients should not call these functions!
|
||
|
|
DWORD SignalForJob();
|
||
|
|
Job * GetAvailableJob();
|
||
|
|
void ThreadFinished() { m_cs.Enter(); m_numActiveThreads--; m_cs.Leave(); }
|
||
|
|
protected:
|
||
|
|
void InitThreadPool(DWORD nThreads);
|
||
|
|
void ShutdownThreads();
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#endif //__TPOOLEDDISPATCH_H__
|