linux c 线程传参数

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

// 线程函数原型
void *print_message(void *ptr);

int main() {
    pthread_t thread1, thread2;
    char *message1 = "Thread 1";
    char *message2 = "Thread 2";

    // 创建线程1
    int ret1 = pthread_create(&thread1, NULL, print_message, (void*)message1);
    if (ret1) {
        printf("Error creating thread 1\n");
        return 1;
    }

    // 创建线程2
    int ret2 = pthread_create(&thread2, NULL, print_message, (void*)message2);
    if (ret2) {
        printf("Error creating thread 2\n");
        return 1;
    }

    // 等待线程结束
    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);

    return 0;
}

// 线程函数
void *print_message(void *ptr) {
    char *msg = (char *) ptr;
    printf("%s \n", msg);
    return NULL;
}

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

int shared_data = 0;
pthread_mutex_t mutex;

void *increment_data(void *arg) {
    for (int i = 0; i < 100000; ++i) {
        pthread_mutex_lock(&mutex);
        shared_data++;
        pthread_mutex_unlock(&mutex);
    }
    return NULL;
}

int main() {
    pthread_t threads[10];
    pthread_mutex_init(&mutex, NULL);

    for (int i = 0; i < 10; ++i) {
        pthread_create(&threads[i], NULL, increment_data, NULL);
    }

    for (int i = 0; i < 10; ++i) {
        pthread_join(threads[i], NULL);
    }

    printf("Final value of shared_data: %d\n", shared_data);
    pthread_mutex_destroy(&mutex);
    return 0;
}