线程

#include <pthread.h>using namespace std;#pragma comment(lib, "pthreadVC2.lib")class SwyThread{public:SwyThread(bool joinable = true): m_joinable(joinable){memset(&m_thread, 0, sizeof(m_thread));}virtual ~SwyThread() {}private:DISALLOW_COPY_AND_ASSIGN(SwyThread);// 默认拷贝构造函数设为private 禁用public:int start(){int err = pthread_create(&m_thread, NULL, SwyThread::threadEntry, this);return err;}void join(){//joinable状态 完了后自己pthread_join下pthread_join(m_thread, NULL);}inline bool joinable(){return m_joinable;}protected:virtual void run() {}private:static void* threadEntry(void* param);private:bool m_joinable;pthread_t m_thread;};void* SwyThread::threadEntry(void* param){SwyThread* pthread = static_cast<SwyThread*>(param);if (pthread != NULL){if (!pthread->joinable()){//unjoinable则退出会自己释放pthread_detach(pthread_self());//状态改为unjoinable 确保资源的释放}pthread->run();}else{//自己分离自己 pthread_self就是自己的线程idpthread_detach(pthread_self());}return NULL;}class TaskA :public SwyThread{public:TaskA(int n) { name = n; }~TaskA() {}protected:virtual void run();public:void stopThread(){m_running = false;join();//linux线程和 windows不同 pthread状态有 joinable和unjoinable//如果joinable线程退出或者pthread_exit，自己不会释放占用的堆栈和线程描述符（8k多空间）//只有当调用了pthread_join后这些资源才释放}private:bool m_running;int name;};void TaskA::run(){m_running = true;int i = 0;while (m_running){cout << "i am " << name << endl;Sleep(1000);if (i++ > name)stopThread();}}int main(){TaskA* a = new TaskA(8);TaskA* b = new TaskA(15);a->start();b->start();}