What is the difference between PTHREAD_RECURSIVE_MUTEX_INITIALIZER and PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP?

Question

With static initialization of a recursive mutex, what is the difference between

static pthread_mutex_t foo_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER;

and

 static pthread_mutex_t foo_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

and why should I use this instead of another?

+6

Vincenzo pii Mar 26 '13 at 12:15

1 answer

Owen · Accepted Answer · 2013-03-26T14:06:42+0000

"_ NP" means a hint that this function is not portable. To save the hint, you better use the "_NP" version.

In addition, I suspect that there is no difference. Not 100% sure.