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Man Pages


Manual Reference Pages  -  SEM_DESTROY (3)

NAME

sem_destroy - destroy an unnamed semaphore

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In semaphore.h int sem_destroy sem_t *sem

DESCRIPTION

The sem_destroy function destroys the unnamed semaphore pointed to by sem. After a successful call to sem_destroy, sem is unusable until re-initialized by another call to sem_init(3).

RETURN VALUES


.Rv -std sem_destroy

ERRORS

The sem_destroy function will fail if:
[EINVAL]
  The sem argument points to an invalid semaphore.
[EBUSY]
  There are currently threads blocked on the semaphore that sem points to.

SEE ALSO

sem_init(3), sem(4)

STANDARDS

The sem_destroy function conforms to -p1003.1-96.

POSIX does not define the behavior of sem_destroy if called while there are threads blocked on sem, but this implementation is guaranteed to return -1 and set errno to EBUSY if there are threads blocked on sem.

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