?? waitconditions.cpp
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#include <qmutex.h>#include <qthread.h>#include <qwaitcondition.h>#include <cstdlib>#include <iostream>using namespace std;const int DataSize = 100000;const int BufferSize = 4096;char buffer[BufferSize];QWaitCondition bufferIsNotFull;QWaitCondition bufferIsNotEmpty;QMutex mutex;int usedSpace = 0;class Producer : public QThread{public: void run();};void Producer::run(){ for (int i = 0; i < DataSize; ++i) { mutex.lock(); while (usedSpace == BufferSize) bufferIsNotFull.wait(&mutex); buffer[i % BufferSize] = "ACGT"[(uint)rand() % 4]; ++usedSpace; bufferIsNotEmpty.wakeAll(); mutex.unlock(); }}class Consumer : public QThread{public: void run();};void Consumer::run(){ for (int i = 0; i < DataSize; ++i) { mutex.lock(); while (usedSpace == 0) bufferIsNotEmpty.wait(&mutex); cerr << buffer[i % BufferSize]; --usedSpace; bufferIsNotFull.wakeAll(); mutex.unlock(); } cerr << endl;}int main(){ Producer producer; Consumer consumer; producer.start(); consumer.start(); producer.wait(); consumer.wait(); return 0;}?? 快捷鍵說明
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