Destroy an unnamed semaphore
#include <semaphore.h> int sem_destroy( sem_t * sem );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The sem_destroy() function destroys the unnamed semaphore referred to by the sem argument. The semaphore must have been previously initialized by the sem_init() function.
Don't use a semaphore after it's been destroyed. If you destroy a semaphore that other processes are currently blocked on, they're unblocked, with an error (EINVAL).
|Don't mix named semaphore operations (sem_open() and sem_close()) with unnamed semaphore operations (sem_init() and sem_destroy()) on the same semaphore.|
POSIX 1003.1 SEM
sem_init(), sem_post(), sem_trywait(), sem_wait()