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Lock the pthread_sleepon* functions
#include <pthread.h>
int pthread_sleepon_lock( void );
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The pthread_sleepon_lock() function calls
pthread_mutex_lock()
on a mutex associated with the
pthread_sleepon* class of functions.
You should call this function
before testing conditions that determine whether you need to call
pthread_sleepon_wait(),
pthread_sleepon_signal(),
or
pthread_sleepon_broadcast().
This mutex prevents other
threads from changing the conditions between the time you examine and
act upon them.
This function may be implemented as a simple macro.
- EOK
- Success.
- EDEADLK
- The calling thread already owns the controlling mutex.
- EAGAIN
- On the first use of pthread_sleepon_lock(), all kernel
mutex objects were in use.
QNX Neutrino
Safety: | |
Cancellation point |
Yes |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
pthread_mutex_lock(),
pthread_sleepon_broadcast(),
pthread_sleepon_signal(),
pthread_sleepon_unlock(),
pthread_sleepon_wait()
Processes and Threads
chapter of Getting Started with QNX Neutrino
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