Attempt to acquire a shared lock on a read-write lock
#include <pthread.h> int pthread_rwlock_tryrdlock( pthread_rwlock_t* rwl );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The pthread_rwlock_tryrdlock() function attempts to acquire a shared lock on the read-write lock referenced by rwl. If the read-write lock is already exclusively locked by any thread (including the calling thread), the function returns immediately instead of blocking until a read lock can be obtained.
POSIX 1003.1 THR
pthread_rwlock_destroy(), pthread_rwlock_init(), pthread_rwlock_rdlock(), pthread_rwlock_trywrlock(), pthread_rwlock_unlock(), pthread_rwlock_wrlock()
Processes and Threads chapter of Getting Started with QNX Neutrino