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/* * 多线程管理类 * */ #ifndef CTHREADPOOLMANAGE_H#define CTHREADPOOLMANAGE_H#include <iostream>#include <pthread.h>#include <unistd.h> #include <list>#include <vector>#include <time.h>#include <asm/errno.h> #define USLEEP_TIME 100#define CHECK_TIME 1 using namespace std;class CDoit{public: virtual int start(void *){}; virtual int end(){};}; class CthreadPoolManage{private: int _minThreads; //最少保留几个线程 int _maxThreads; //最多可以有几个线程 int _waitSec; //空闲多少秒后将线程关闭 class threadInfo{ public: threadInfo(){ isbusy = false; doFlag = true; } // pthread_mutex_t mtx=PTHREAD_MUTEX_INITIALIZER; pthread_cond_t cond=PTHREAD_COND_INITIALIZER; bool isbusy; //是否空闲 bool doFlag; // time_t beginTime; //线程不工作开始时间 pthread_t cThreadPid; //线程id pthread_attr_t cThreadAttr; //线程属性 CDoit * doit; //任务类 void * value; //需要传递的值 }; //线程函数 static void* startThread(void*); //任务队列锁 pthread_mutex_t _duty_mutex; //任务队列 list<threadInfo*> _dutyList; //线程队列锁 pthread_mutex_t _thread_mutex; //线程队列 list<threadInfo*> _threadList; ///初始化，创建最小个数线程///void initThread(); ///任务分配线程///static void* taskAllocation(void*arg);pthread_t tasktPid;///线程销毁、状态检查线程///static void* checkThread(void* arg);pthread_t checktPid;bool checkrun; //线程异常退出清理static void threadCleanUp(void* arg); //int addThread(list<threadInfo*> *plist,threadInfo* ptinfo); public:CthreadPoolManage();/*保留的最少线程，最多线程数，空闲多久销毁，保留几个线程的冗余 */CthreadPoolManage(int min,int max,int waitSec);~CthreadPoolManage(); int start();//任务注入器int putDuty(CDoit *,void *); int getNowThreadNum(); }; #endif // CTHREADPOOLMANAGE_H |
CPP文件
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/* * 线程池，线程管理类 * */ #include "cthreadpoolmanage.h" CthreadPoolManage::CthreadPoolManage(){ _minThreads = 5; //最少保留几个线程 _maxThreads = 5; //最多可以有几个线程 _waitSec = 10; //空闲多少秒后将线程关闭 pthread_mutex_init(&_duty_mutex, NULL); pthread_mutex_init(&_thread_mutex, NULL); checkrun = true;} CthreadPoolManage::CthreadPoolManage(int min, int max, int waitSec){ CthreadPoolManage(); _minThreads = min; //最少保留几个线程 _maxThreads = max; //最多可以有几个线程 _waitSec = waitSec; //空闲多少秒后将线程关闭} CthreadPoolManage::~CthreadPoolManage(){ }void CthreadPoolManage::threadCleanUp(void* arg){ threadInfo* tinfo = (threadInfo*)arg; tinfo->isbusy = false; pthread_mutex_unlock(&tinfo->mtx); pthread_attr_destroy (&tinfo->cThreadAttr); delete tinfo;} void* CthreadPoolManage::startThread(void* arg){ cout<<"线程开始工作"<<endl; threadInfo* tinfo = (threadInfo*)arg; pthread_cleanup_push(threadCleanUp,arg); while(tinfo->doFlag){ pthread_mutex_lock(&tinfo->mtx); if(tinfo->doit == NULL) { cout<<"开始等待任务"<<endl; pthread_cond_wait(&tinfo->cond,&tinfo->mtx); cout<<"有任务了"<<endl; } tinfo->isbusy = true; tinfo->doit->start(tinfo->value); tinfo->doit->end(); tinfo->doit=NULL; tinfo->isbusy = false; time( &tinfo->beginTime); pthread_mutex_unlock(&tinfo->mtx); } //0正常执行到这儿不执行清理函数，异常会执行 pthread_cleanup_pop(0); pthread_attr_destroy (&tinfo->cThreadAttr); delete tinfo; cout<<"线程结束"<<endl;} void CthreadPoolManage::initThread(){ int i = 0; for(i = 0;i<this->_minThreads;i++) { threadInfo *tinfo = new threadInfo; tinfo->doit = NULL; tinfo->value = NULL; tinfo->isbusy = false; tinfo->doFlag = true; // PTHREAD_CREATE_DETACHED (分离线程) 和 PTHREAD _CREATE_JOINABLE (非分离线程) pthread_attr_init(&tinfo->cThreadAttr); pthread_attr_setdetachstate(&tinfo->cThreadAttr,PTHREAD_CREATE_DETACHED ); cout<<"初始化了一个线程"<<endl; if(pthread_create(&tinfo->cThreadPid,&tinfo->cThreadAttr,startThread,(void *)tinfo) != 0) { cout<<"创建线程失败"<<endl; break; } this->_threadList.push_back(tinfo); }} int CthreadPoolManage::addThread(std::list< CthreadPoolManage::threadInfo* >* plist, CthreadPoolManage::threadInfo* ptinfo){ threadInfo *tinfo = new threadInfo; tinfo->doit = ptinfo->doit; tinfo->value = ptinfo->value; tinfo->isbusy = true; if(pthread_create(&tinfo->cThreadPid,NULL,startThread,(void *)tinfo) != 0) { cout<<"创建线程失败"<<endl; return -1; } plist->push_back(tinfo); return 0;} int CthreadPoolManage::putDuty(CDoit* doit, void* value){ threadInfo *tinfo = new threadInfo; time( &tinfo->beginTime); tinfo->doit= doit; tinfo->value = value; pthread_mutex_lock(&_duty_mutex); this->_dutyList.push_back(tinfo); pthread_mutex_unlock(&_duty_mutex); return 0;} void* CthreadPoolManage::taskAllocation(void*arg){ CthreadPoolManage * ptmanage = (CthreadPoolManage*)arg; int size_1 = 0; int size_2 = 0; int i_1 = 0; int i_2 = 0; bool a_1 = true; bool a_2 = true; threadInfo* ptinfo; threadInfo* ptinfoTmp; while(true){ size_1 = 0; size_2 = 0; pthread_mutex_lock(&ptmanage->_duty_mutex); pthread_mutex_lock(&ptmanage->_thread_mutex); size_1 = ptmanage->_dutyList.size(); size_2 =ptmanage->_threadList.size(); for(list<threadInfo*>::iterator itorti1 = ptmanage->_dutyList.begin();itorti1 !=ptmanage->_dutyList.end();) { ptinfo = *itorti1; a_1 = true; for(list<threadInfo*>::iterator itorti2 = ptmanage->_threadList.begin();itorti2!=ptmanage->_threadList.end();itorti2++){ ptinfoTmp = *itorti2; if(EBUSY == pthread_mutex_trylock(&ptinfoTmp->mtx)) { continue; } if(!ptinfoTmp->isbusy) { ptinfoTmp->doit = ptinfo->doit; ptinfoTmp->value = ptinfo->value; ptinfoTmp->isbusy = true; pthread_cond_signal(&ptinfoTmp->cond); pthread_mutex_unlock(&ptinfoTmp->mtx); a_1 = false; delete ptinfo; break; } pthread_mutex_unlock(&ptinfoTmp->mtx); } if(a_1){ if(ptmanage->_threadList.size()>ptmanage->_maxThreads||ptmanage->addThread(&ptmanage->_threadList,ptinfo)!=0) { itorti1++; continue; }else{ itorti1 = ptmanage->_dutyList.erase(itorti1); } delete ptinfo; }else{ itorti1 = ptmanage->_dutyList.erase(itorti1); } } pthread_mutex_unlock(&ptmanage->_duty_mutex); pthread_mutex_unlock(&ptmanage->_thread_mutex); usleep(USLEEP_TIME); } return 0;} void* CthreadPoolManage::checkThread(void* arg){ CthreadPoolManage * ptmanage = (CthreadPoolManage*)arg; threadInfo* ptinfo; time_t nowtime; while(ptmanage->checkrun){ sleep(CHECK_TIME); pthread_mutex_lock(&ptmanage->_thread_mutex); if(ptmanage->_threadList.size()<=ptmanage->_minThreads) { continue; } for(list<threadInfo*>::iterator itorti2 = ptmanage->_threadList.begin();itorti2!=ptmanage->_threadList.end();){ ptinfo = *itorti2; if(EBUSY == pthread_mutex_trylock(&ptinfo->mtx)) { itorti2++; continue; } time(&nowtime); if(ptinfo->isbusy == false && nowtime-ptinfo->beginTime>ptmanage->_waitSec) { ptinfo->doFlag = false; itorti2 = ptmanage->_threadList.erase(itorti2); }else{ itorti2++; } pthread_mutex_unlock(&ptinfo->mtx); } pthread_mutex_unlock(&ptmanage->_thread_mutex); }} int CthreadPoolManage::start(){ //初始化 this->initThread(); //启动任务分配线程 if(pthread_create(&tasktPid,NULL,taskAllocation,(void *)this) != 0) { cout<<"创建任务分配线程失败"<<endl; return -1; } //创建现程状态分配管理线程 if(pthread_create(&checktPid,NULL,checkThread,(void *)this) != 0) { cout<<"创建线程状态分配管理线程失败"<<endl; return -1; } return 0;} ///////////////////////////////int CthreadPoolManage::getNowThreadNum(){ int num = 0; pthread_mutex_lock(&this->_thread_mutex); num = this->_threadList.size(); pthread_mutex_unlock(&this->_thread_mutex); return num ;} |
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