Function pthread_mutex_init

components/libc/posix/pthreads/pthread_mutex.c:296–322

* @brief Initializes a mutex with optional attributes. * * This function initializes a mutex object pointed to by `mutex`. The mutex * can optionally be initialized with attributes specified by `attr`. If * `attr` is `NULL`, default attributes are used. * * @param[in,out] mutex Pointer to the mutex to be initialized. * @param[in] attr Pointer to the mutex attributes object. Pass `NULL` to u

 * @see pthread_mutex_destroy, pthread_mutex_lock, pthread_mutex_unlock
 */
int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
{
    rt_err_t result;
    char name[RT_NAME_MAX];
    static rt_uint16_t pthread_mutex_number = 0;

    if (!mutex)
        return EINVAL;

    /* build mutex name */
    rt_snprintf(name, sizeof(name), "pmtx%02d", pthread_mutex_number ++);
    if (attr == RT_NULL)
        mutex->attr = pthread_default_mutexattr;
    else
        mutex->attr = *attr;

    /* init mutex lock */
    result = rt_mutex_init(&(mutex->lock), name, RT_IPC_FLAG_PRIO);
    if (result != RT_EOK)
        return EINVAL;

    /* detach the object from system object container */
    rt_object_detach(&(mutex->lock.parent.parent));
    mutex->lock.parent.parent.type = RT_Object_Class_Mutex;

    return 0;
}
RTM_EXPORT(pthread_mutex_init);

/**