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Manual Pages  — SEM_DESTROY

NAME

sem_destroy – destroy an unnamed semaphore

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <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

The sem_destroy function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

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)

STANDARDS

The sem_destroy() function conforms to IEEE Std 1003.1-96 ("POSIX.1").

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.


SEM_DESTROY (3) February 15, 2000

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