C ++线程不起作用

Question

尝试让我的线程工作有点麻烦。我是新手，所以我不太确定我遇到了什么问题。

std::thread* activeThread = new std::thread[threadCount];
std::condition_variable* tempvar = new std::condition_variable();
std::mutex* tempmut = new std::mutex();

for (int i = threadCount - 1; i >= 0; i--)
{
    perThreadData[i].id = i;
    perThreadData[i].sharedStringLength = sharedStringLength;
    perThreadData[i].numberOfStringsToGenerate = numberOfStringsToGenerate;
    perThreadData[i].waitTime = waitTime;
    perThreadData[i].sharedString = sharedString;
    perThreadData[i].runType = runType;
    perThreadData[i].conVar = tempvar;
    perThreadData[i].mutex = tempmut;

    activeThread[i] = std::thread( ThreadEntryPoint, &perThreadData[i] );
}

for( int i = 0; i < threadCount; i++ ) {
    activeThread[i].join();
}

这是入口点功能：

void ThreadEntryPoint(ThreadStruct *threadData)
{
    for(int i = 0; i < threadData->numberOfStringsToGenerate; i++)
    {
        if( threadData->runType == 3 )
        {
            threadData->mutex->lock();
        }

        if(threadData->waitTime != 0)
        {
            // Blocks the current thread for a given amount of time.
            std::this_thread::sleep_for(std::chrono::milliseconds(threadData->waitTime));
        }

        if( threadData->runType == 1 ){
            threadData->mutex->lock();
        }

        for(int j = 0; j < threadData->sharedStringLength; j++)
        {
            if( threadData->runType != 3 ) {
                std::this_thread::sleep_for(std::chrono::milliseconds(1));
            }

            threadData->sharedString[j] = 'A' + threadData->id;
        }

        printf("Thread %d: %s\n", threadData->id, threadData->sharedString);

        if( threadData->runType == 1 ) {
            threadData->mutex->unlock();
        }
    }
}

RunType应该根据输入执行此操作：

0 - 按原设计运行

1 - 运行所以线程的每个字符串始终是相同的字母

2 - 运行以便线程在允许任何其他线程进行迭代之前完成所有迭代

3 - 运行以便线程始终以线程0的顺序运行到线程n