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93 lines
2 KiB
C++
93 lines
2 KiB
C++
/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
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/* If you are missing that file, acquire a complete release at teeworlds.com. */
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#include <base/system.h>
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#include "jobs.h"
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CJobPool::CJobPool()
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{
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// empty the pool
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m_NumThreads = 0;
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m_Shutdown = false;
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m_Lock = lock_create();
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sphore_init(&m_Semaphore);
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m_pFirstJob = 0;
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m_pLastJob = 0;
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}
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CJobPool::~CJobPool()
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{
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m_Shutdown = true;
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for(int i = 0; i < m_NumThreads; i++)
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sphore_signal(&m_Semaphore);
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for(int i = 0; i < m_NumThreads; i++)
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thread_wait(m_apThreads[i]);
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lock_destroy(m_Lock);
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sphore_destroy(&m_Semaphore);
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}
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void CJobPool::WorkerThread(void *pUser)
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{
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CJobPool *pPool = (CJobPool *)pUser;
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while(!pPool->m_Shutdown)
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{
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CJob *pJob = 0;
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// fetch job from queue
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sphore_wait(&pPool->m_Semaphore);
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lock_wait(pPool->m_Lock);
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if(pPool->m_pFirstJob)
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{
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pJob = pPool->m_pFirstJob;
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pPool->m_pFirstJob = pPool->m_pFirstJob->m_pNext;
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if(pPool->m_pFirstJob)
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pPool->m_pFirstJob->m_pPrev = 0;
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else
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pPool->m_pLastJob = 0;
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}
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lock_unlock(pPool->m_Lock);
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// do the job if we have one
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if(pJob)
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{
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pJob->m_Status = CJob::STATE_RUNNING;
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pJob->m_Result = pJob->m_pfnFunc(pJob->m_pFuncData);
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pJob->m_Status = CJob::STATE_DONE;
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if(pJob->m_pfnDestroy)
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pJob->m_pfnDestroy(pJob, pJob->m_pFuncData);
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}
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}
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}
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int CJobPool::Init(int NumThreads)
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{
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// start threads
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m_NumThreads = NumThreads > MAX_THREADS ? MAX_THREADS : NumThreads;
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for(int i = 0; i < NumThreads; i++)
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m_apThreads[i] = thread_init(WorkerThread, this);
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return 0;
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}
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int CJobPool::Add(CJob *pJob, JOBFUNC pfnFunc, void *pData, CBFUNC pfnDestroy)
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{
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mem_zero(pJob, sizeof(CJob));
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pJob->m_pfnFunc = pfnFunc;
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pJob->m_pFuncData = pData;
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pJob->m_pfnDestroy = pfnDestroy;
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lock_wait(m_Lock);
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// add job to queue
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pJob->m_pPrev = m_pLastJob;
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if(m_pLastJob)
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m_pLastJob->m_pNext = pJob;
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m_pLastJob = pJob;
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if(!m_pFirstJob)
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m_pFirstJob = pJob;
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lock_unlock(m_Lock);
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sphore_signal(&m_Semaphore);
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return 0;
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}
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