linux 多线程 占用内存

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

void* thread_func(void* arg) {
    int* data = (int*)malloc(sizeof(int));
    if (data == NULL) {
        perror("Failed to allocate memory");
        return NULL;
    }
    // 使用data
    free(data);  // 确保释放内存
    return NULL;
}

int main() {
    pthread_t thread;
    if (pthread_create(&thread, NULL, thread_func, NULL) != 0) {
        perror("Failed to create thread");
        return 1;
    }
    pthread_join(thread, NULL);
    return 0;
}

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

int shared_data = 0;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

void* thread_func(void* arg) {
    pthread_mutex_lock(&mutex);
    shared_data++;
    pthread_mutex_unlock(&mutex);
    return NULL;
}

int main() {
    pthread_t threads[10];
    for (int i = 0; i < 10; ++i) {
        pthread_create(&threads[i], NULL, thread_func, NULL);
    }
    for (int i = 0; i < 10; ++i) {
        pthread_join(threads[i], NULL);
    }
    printf("Shared data: %d\n", shared_data);
    return 0;
}

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

pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;

void* thread1_func(void* arg) {
    pthread_mutex_lock(&mutex1);
    pthread_mutex_lock(&mutex2);
    // 执行任务
    pthread_mutex_unlock(&mutex2);
    pthread_mutex_unlock(&mutex1);
    return NULL;
}

void* thread2_func(void* arg) {
    pthread_mutex_lock(&mutex1);  // 确保获取锁的顺序一致
    pthread_mutex_lock(&mutex2);
    // 执行任务
    pthread_mutex_unlock(&mutex2);
    pthread_mutex_unlock(&mutex1);
    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;
}