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Attempt to lock a mutex
#include <pthread.h>
int pthread_mutex_trylock( pthread_mutex_t* mutex );
- mutex
- A pointer to the pthread_mutex_t object that you want to
try to lock.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The pthread_mutex_trylock() function attempts to lock the mutex
mutex, but doesn't block the calling thread if the mutex is
already locked.
- EOK
- Success.
- EAGAIN
- Insufficient resources available to lock the mutex.
- EBUSY
- The mutex was already locked.
- EINVAL
- Invalid mutex mutex.
POSIX 1003.1 THR
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
pthread_mutex_lock(),
pthread_mutex_timedlock(),
pthread_mutex_unlock()
“Mutexes: mutual exclusion locks”
in the QNX Neutrino Microkernel chapter of the
System Architecture guide
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