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【
C
】
线程池
作者:
小强无敌
/ 发布于
2015/3/23
/
621
/* * 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 2. [代码]cpp文件 ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 /* * 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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线程池
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