如何“停止”正在等待条件变量的分离线程？

#include <iostream>
#include <pthread.h>

bool stopThread = false;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void* threadFunc(void* arg) {
    pthread_mutex_lock(&mutex);
    while (!stopThread) {
        pthread_cond_wait(&cond, &mutex);
    }
    pthread_mutex_unlock(&mutex);
    std::cout << "Thread stopped." << std::endl;
    pthread_exit(NULL);
}

int main() {
    pthread_t thread;
    pthread_create(&thread, NULL, threadFunc, NULL);
    
    // 停止线程
    pthread_mutex_lock(&mutex);
    stopThread = true;
    pthread_cond_signal(&cond);
    pthread_mutex_unlock(&mutex);
    
    pthread_join(thread, NULL);
    
    return 0;
}