_sleepon_lock()
Lock a sleepon
Synopsis:
#include <pthread.h>
int _sleepon_lock( sleepon_t * l );
Arguments:
- l
- A pointer to a sleepon_t that you created by calling _sleepon_init() .
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The _sleepon_lock() function locks the mutex associated with the sleepon structure, l.
You must call this function before calling _sleepon_wait() , _sleepon_signal() , or _sleepon_broadcast() .
Returns:
- EOK
- Success.
- EAGAIN
- Insufficient system resources were available to lock the mutex.
- EDEADLK
- The calling thread already owns mutex, and the mutex doesn't allow recursive behavior.
- EINVAL
- Invalid mutex.
The _sleepon_lock() function returns the same values as pthread_mutex_lock() .
Classification:
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |