Is Mutex Priority Ceiling supported?

QNX Newsgroups (Archives) qdn.public.ddk.network
1

I’m using QNX 6.2.1.

In pthread.h…

extern int pthread_mutex_getprioceiling(const pthread_mutex_t *__mutex, int
*__prioceiling);
extern int pthread_mutex_setprioceiling(pthread_mutex_t *__mutex, int
__prioceiling, int *__old_ceiling);

A call to either of these returns 22 (EINVAL) - the mutex doesn’t currently
exist.

But a lock or unlock of the same mutex returns 0 (EOK).

2

Yep it’s supported.

Just make sure you’re setting the protocol on the mutexattr to
PTHREAD_PRIO_PROTECT, and use that mutexattr to initialize your mutex.

-Adam

Ian Macafee <imacafee@radamec.co.uk> wrote in message
news:b8bemf$1iv$1@inn.qnx.com…

I’m using QNX 6.2.1.

In pthread.h…

extern int pthread_mutex_getprioceiling(const pthread_mutex_t *__mutex,
int
*__prioceiling);
extern int pthread_mutex_setprioceiling(pthread_mutex_t *__mutex, int
__prioceiling, int *__old_ceiling);

A call to either of these returns 22 (EINVAL) - the mutex doesn’t
currently
exist.

But a lock or unlock of the same mutex returns 0 (EOK).
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