平时没在意，敲敲代码就出来了，可实际用笔在纸上书写的时候就不知所措了
QT比较熟悉，就用它来实现吧！
#ifndef HELLOTHREAD_H
#define HELLOTHREAD_H#include
#include class HelloThread : public QThread
{
public:
HelloThread(int type=0);
void stop();
protected:
void run();
public:
int m_type;
int m_exitflag;
private:
static QMutex m_mutex;
static int m_status;
};
#endif // HELLOTHREAD_H
#include "hellothread.h"//静态全局变量
QMutex HelloThread::m_mutex;
int HelloThread::m_status = 0;
HelloThread::HelloThread(int type)
: m_type(type)
{
m_exitflag = false;
}void HelloThread::stop()
{
m_exitflag = true;
}void HelloThread::run()
{
printf("\n enter thread = %p\n", QThread::currentThreadId() );
while( !m_exitflag )
{
QMutexLocker locker(&HelloThread::m_mutex);
if(0==this->m_type && HelloThread::m_status==0)
{
printf("A\n");
HelloThread::m_status = 1;
//this->m_status也是可以的，但不规范
}
else if(1==this->m_type && HelloThread::m_status==1)
{
printf("B\n");
HelloThread::m_status = 0;
//this->m_status也是可以的，但不规范
}
locker.unlock();
msleep(10);
}
m_exitflag = false;
printf("\n leave thread = %p\n", QThread::currentThreadId() );
}
主要是用全局变量实现线程间的通讯，为了保证全局变量的状态唯一，需要加锁控制，就用最简单的QMutex吧~~~~
#include
#include "hellothread.h"//实现多线程，循环打印ABABABABABAB......int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
printf("in main thread...%p\n", QThread::currentThreadId() );
HelloThread TA(0);
HelloThread TB(1);
TA.start();
//开启线程
TB.start();
if( 'q'==getchar() )//等待用户输入
{
TA.quit();
//退出线程（不管用）
TB.quit();
printf("in main exiting...\n");
TA.stop();
//使用条件退出
TB.stop();
}TA.wait();
//等待线程结束
TB.wait();
printf("in main exited thread...%p\n", QThread::currentThreadId());
exit(0);
//按键才有效，为何？return a.exec();
}
文章图片
【使用多线程手动写出循环打印ABABABAB...】貌似达到了目的，提笔就忘字，怎么办啊！！！
