As a second argument, it can also accept an optional pthread_mutexattr_t pointer.

第二个参数，可以接受一个可选的pthread _ mutexattr_t指针。

youdao

As a second argument, it can also accept an optional pthread_mutexattr_t pointer.

第二个参数，可以接受一个可选的pthread _ mutexattr_t指针。

youdao