171 lines
3.2 KiB
C++
171 lines
3.2 KiB
C++
#include "threadclock.h"
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#include "GlobalData.h"
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#include <QMutex>
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#include <QDebug>
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#include <QReadWriteLock>
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#include <QWaitCondition>
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#include <QSemaphore>
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QMutex mutex(QMutex::Recursive);//默认那种方式不行，另一个线程不会阻塞等待
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QReadWriteLock rwLock(QReadWriteLock::Recursive);
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QMutex mutexCon;//配合等待条件，不能用上面那种
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QWaitCondition condition;
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//信号量
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QSemaphore sem(8);
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ThreadClock::ThreadClock(QObject *parent)
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: QThread{parent}
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{
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;
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}
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QString ThreadClock::name() const
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{
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return m_name;
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}
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void ThreadClock::setName(const QString &newName)
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{
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m_name = newName;
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}
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#if 1
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void ThreadClock::run()
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{
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mutex.lock();
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while (g_count < 5) {
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g_count++;
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qDebug() << m_name << g_count;
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sleep(1);
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}
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g_count = 0;
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mutex.unlock();
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}
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#endif
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#if 0
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/*
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"2thread" 2
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"1thread" 1
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"1thread" 4
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"2thread" 4
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"2thread" 0
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"2thread" 1
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"2thread" 2
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"2thread" 3
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"2thread" 4
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"2thread" 5
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*/
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//可见读锁在线程之间是不阻塞的
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void ThreadClock::run()
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{
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rwLock.lockForRead();
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while (g_count < 5) {
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g_count++;
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qDebug() << m_name << g_count;
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sleep(1);
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}
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g_count = 0;
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rwLock.unlock();
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}
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#endif
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#if 0
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/*
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"1thread" 1
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"1thread" 2
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"1thread" 3
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"1thread" 4
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"1thread" 5
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"2thread" 1
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"2thread" 2
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"2thread" 3
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"2thread" 4
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"2thread" 5
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*/
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//读写锁之间是阻塞的
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void ThreadClock::run()
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{
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if (m_name == "1thread") {
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rwLock.lockForRead();
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}else {
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rwLock.lockForWrite();
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}
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while (g_count < 5) {
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g_count++;
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qDebug() << m_name << g_count;
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sleep(1);
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}
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g_count = 0;
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rwLock.unlock();
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}
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#endif
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#if 0
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//QWaitCondition的使用 注意：无限循环
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void ThreadClock::run()
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{
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//生产者
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if (m_name == "1thread") {
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while (true) {
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mutexCon.lock();
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g_count++;//生产
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qDebug() << m_name << g_count;//生产的数据
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condition.wakeAll();//唤醒其它线程（可以消费）
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mutexCon.unlock();
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}
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}else{//消费者
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while (true) {
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mutexCon.lock();
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while (g_count <= 0) {//说明生产者还没有生产数据
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condition.wait(&mutexCon);//等待生产者生产完成，解锁
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}
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qDebug() << m_name << g_count;//消费的数据
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g_count--;//消费
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mutexCon.unlock();
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}
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}
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}
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#endif
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/*
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"1thread" 0
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"1thread" 1
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"1thread" 2
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"1thread" 3
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"1thread" 4
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"1thread" 5
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"1thread" 6
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"1thread" 7 这里已经满了，无法生产了
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"2thread" 0 消费一个之后
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"1thread" 8 才能继续生产
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"2thread" 1
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"1thread" 9
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"2thread" 9
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*/
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#if 0
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//信号量的使用 注意：无限循环
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void ThreadClock::run()
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{
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//生产者
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if (m_name == "1thread") {
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while (true) {
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sem.acquire(1);
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g_bufferData[g_count % 8] = '0' + g_count;//这里把g_count当成索引
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qDebug() << m_name << g_bufferData[g_count % 8];//生产的数据
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g_count++;
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}
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}else{//消费者
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while (true) {
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qDebug() << m_name << g_bufferData[g_count % 8];//消费的数据
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sem.release(1);
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}
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}
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}
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#endif
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