#include <QtCore>#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;}