_sleepon_wait()

Wait on a sleepon lock

Synopsis:

#include <pthread.h>

int _sleepon_wait( sleepon_t * l, 
                   const volatile void * addr,
                   uint64_t nsec);

Arguments:

l: A pointer to a sleepon_t that you created by calling _sleepon_init().
addr: The handle that you want to wait on. The value of addr is typically a data structure that controls a resource.
nsec: Zero, or the amount of time, in nanoseconds, to wait before the thread wakes up. If this timeout occurs, ETIMEDOUT is returned.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The _sleepon_wait() function blocks on the sleepon l using the key addr until woken up by either a _sleepon_signal() or a _sleepon_broadcast() call that uses the same addr key.

The calling thread must first have locked the sleepon by calling _sleepon_lock().

When the thread returns from this function, it must release the sleepon lock by calling _sleepon_unlock().

Returns:

0: Success.
≠0: Failure; a nonzero errno value.

Classification:

QNX Neutrino

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	No
Thread	Yes