#include <pthread.h> #include <stdio.h> pthread_mutex_t static_mutex = PTHREAD_MUTEX_INITIALIZER; void* thread_func(void* arg) { pthread_mutex_lock(&static_mutex); // 访问共享资源 pthread_mutex_unlock(&static_mutex); return NULL; } int main() { pthread_t thread; pthread_create(&thre...
很久之前在《unix网络编程 卷二》中看到pthread_mutex_t放在共享内存可以用于进程间加锁,原来在《卷一》中也有。。。 1, 创建pthread_mutex_t共享内存 2,设置属性为PTHREAD_PROCESS_SHARED staticpthread_mutex_t*mptr;/* actual mutex will be in shared memory */voidmy_lock_init(char*pathname){intfd;pthre...
4 互斥锁:mutex_lock 多线程编程遇到的第一个问题就是多个线程同时操作某一个相同数据时会出问题。因而我们需要引进互斥锁的概念 在thread 线程库中。最简单的线程锁为: pthread_mutex_t 使用方法: 4.1 定义并初始化一个互斥锁: static pthread_mutex_t ack_head_list_lock = PTHREAD_MUTEX_INITIALIZER; 1. 4...
1:多线程所调用的成员方法定义为static。 2:互斥锁(pthread_mutex_t)定义在cpp文件的开头,并且也定义为static。 3:pthread_mutex_init方法尽量在最早的时候进行调用初始化(绝对不要在初始化之后立即开始新线程,否则pthread_mutex_lock很可能会返回22的错误,因为此时互斥量还没有初始化完成)。 4:pthread_mutex_destr...
static pthread_mutex_tmutex= PTHREAD_MUTEX_INITIALIZER; Description ThePTHREAD_MUTEX_INITIALIZERmacro initializes the static mutexmutex, setting its attributes to default values. This macro must only be used for static mutexes, as no error checking is performed. ...
swift使用 pthread_mutex_init swift completion,一、扩展(extension) extension(类似OC中的分类, 但Swift中没有名字), 即在没有权限获取到原始代码的情况下, 为类增加新功能.: 只要定义了扩展, 那么该扩展对该类的实例都是可用的.[java]&
static void *thread_func(void *arg) { struct node *p = NULL; pthread_cleanup_push(cleanup_handler, p); while (1) { pthread_mutex_lock(&mtx); while (head == NULL) { pthread_cond_wait(&cond, &mtx); } p = head; head = head->n_next; ...
static void *original_owner_thread(void *ptr) { printf("[original owner] Setting lock...\n"); pthread_mutex_lock(&mtx); printf("[original owner] Locked. Now exiting without unlocking.\n"); pthread_exit(NULL);//加锁后退出不释放锁 } int main(int argc, char *argv[]) { pthread_t ...
static pthread_mutex_t uart_mutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_lock(&uart_mutex); pthread_mutex_unlock(&uart_mutex); API 初始化方法 Pthread: #include <pthread.h> int pthread_mutex_init(pthread_mutex_t *restrict mutex, const pthread_mutexattr_t *restrict attr); ...
// 清理函数栈 struct __pthread_mutex_s *mutex_list; // 线程持有的互斥锁列表struct __pthread_cond_s *cond_list; // 线程等待的条件变量列表unsigned int detach_state:2; // 线程分离状态,包括分离和未分离两种; unsigned int sched_priority:30; // 线程的调度优先级 unsigned int errno_val; //...