linux 多线程超时控制

#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void* thread_func(void* arg) {
    pthread_mutex_lock(&mutex);
    struct timespec ts;
    clock_gettime(CLOCK_REALTIME, &ts);
    ts.tv_sec += 5; // 设置超时时间为5秒

    int ret = pthread_cond_timedwait(&cond, &mutex, &ts);
    if (ret == ETIMEDOUT) {
        printf("Thread timeout!\n");
    } else if (ret == 0) {
        printf("Thread awakened!\n");
    } else {
        perror("pthread_cond_timedwait");
    }
    pthread_mutex_unlock(&mutex);
    return NULL;
}

int main() {
    pthread_t thread;
    pthread_create(&thread, NULL, thread_func, NULL);

    sleep(3); // 主线程休眠3秒
    pthread_cond_signal(&cond); // 唤醒等待的线程

    pthread_join(thread, NULL);
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <pthread.h>

volatile sig_atomic_t timeout_flag = 0;

void timeout_handler(int signum) {
    timeout_flag = 1;
}

void* thread_func(void* arg) {
    while (!timeout_flag) {
        // 执行任务
        printf("Thread working...\n");
        sleep(1);
    }
    printf("Thread timeout!\n");
    return NULL;
}

int main() {
    signal(SIGALRM, timeout_handler);
    alarm(5); // 设置超时时间为5秒

    pthread_t thread;
    pthread_create(&thread, NULL, thread_func, NULL);

    pthread_join(thread, NULL);
    alarm(0); // 取消定时器
    return 0;
}