linux c 多线程编程

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

void* print_hello(void* arg) {
    printf("Hello from thread %ld\n", (long)arg);
    pthread_exit(NULL);
}

int main() {
    pthread_t threads[5];
    int rc;
    long t;

    for (t = 0; t < 5; t++) {
        printf("Main: creating thread %ld\n", t);
        rc = pthread_create(&threads[t], NULL, print_hello, (void*)t);
        if (rc) {
            printf("Error: unable to create thread %d\n", rc);
            exit(-1);
        }
    }

    for (t = 0; t < 5; t++) {
        pthread_join(threads[t], NULL);
    }

    pthread_exit(NULL);
}

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

int shared_data = 0;
pthread_mutex_t mutex;

void* thread_func(void* arg) {
    pthread_mutex_lock(&mutex);
    shared_data++;
    printf("Thread %ld: shared_data = %d\n", (long)arg, shared_data);
    pthread_mutex_unlock(&mutex);
    return NULL;
}

int main() {
    pthread_t threads[5];
    pthread_mutex_init(&mutex, NULL);

    for (long t = 0; t < 5; t++) {
        pthread_create(&threads[t], NULL, thread_func, (void*)t);
    }

    for (int i = 0; i < 5; i++) {
        pthread_join(threads[i], NULL);
    }

    pthread_mutex_destroy(&mutex);
    return 0;
}

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

pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;

void* thread1_func(void* arg) {
    pthread_mutex_lock(&mutex1);
    sleep(1); // 模拟耗时操作
    pthread_mutex_lock(&mutex2);
    printf("Thread 1\n");
    pthread_mutex_unlock(&mutex2);
    pthread_mutex_unlock(&mutex1);
    return NULL;
}

void* thread2_func(void* arg) {
    pthread_mutex_lock(&mutex2);
    sleep(1); // 模拟耗时操作
    pthread_mutex_lock(&mutex1);
    printf("Thread 2\n");
    pthread_mutex_unlock(&mutex1);
    pthread_mutex_unlock(&mutex2);
    return NULL;
}

int main() {
    pthread_t thread1, thread2;

    pthread_create(&thread1, NULL, thread1_func, NULL);
    pthread_create(&thread2, NULL, thread2_func, NULL);

    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);

    return 0;
}