linux 多线程超时中断

#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) {
    struct timespec ts;
    clock_gettime(CLOCK_REALTIME, &ts);
    ts.tv_sec += 5; // 设置5秒超时

    pthread_mutex_lock(&mutex);
    int ret = pthread_cond_timedwait(&cond, &mutex, &ts);
    pthread_mutex_unlock(&mutex);

    if (ret == ETIMEDOUT) {
        printf("Thread timeout!\n");
    } else if (ret == 0) {
        printf("Condition met!\n");
    } else {
        perror("pthread_cond_timedwait");
    }

    return NULL;
}

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

    // 模拟其他操作
    sleep(2);

    pthread_mutex_lock(&mutex);
    pthread_cond_signal(&cond); // 发送信号
    pthread_mutex_unlock(&mutex);

    pthread_join(thread, NULL);
    return 0;
}

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

void timeout_handler(int signum) {
    printf("Timeout occurred!\n");
    exit(signum);
}

void* thread_func(void* arg) {
    signal(SIGALRM, timeout_handler);
    alarm(5); // 设置5秒超时

    // 模拟长时间操作
    sleep(10);

    printf("Operation completed successfully.\n");
    return NULL;
}

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

    pthread_join(thread, NULL);
    return 0;
}