linux 多线程 设置

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

#define NUM_THREADS 5

void* thread_function(void* arg) {
    int thread_id = *(int*)arg;
    printf("Thread %d is running\n", thread_id);
    pthread_exit(NULL);
}

int main() {
    pthread_t threads[NUM_THREADS];
    int thread_ids[NUM_THREADS];

    for (int i = 0; i < NUM_THREADS; i++) {
        thread_ids[i] = i;
        int rc = pthread_create(&threads[i], NULL, thread_function, (void*)&thread_ids[i]);
        if (rc) {
            printf("Error: unable to create thread %d\n", rc);
            exit(-1);
        }
    }

    for (int i = 0; i < NUM_THREADS; i++) {
        pthread_join(threads[i], NULL);
    }

    printf("Main thread exiting\n");
    pthread_exit(NULL);
}

gcc -pthread -o multithread_example multithread_example.c

./multithread_example