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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON |
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sem_close(3) Library Functions Manual sem_close(3)
sem_close - close a named semaphore
POSIX threads library (libpthread, -lpthread)
#include <semaphore.h>
int sem_close(sem_t *sem);
sem_close() closes the named semaphore referred to by sem,
allowing any resources that the system has allocated to the
calling process for this semaphore to be freed.
On success sem_close() returns 0; on error, -1 is returned, with
errno set to indicate the error.
EINVAL sem is not a valid semaphore.
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├─────────────────────────────────────┼───────────────┼─────────┤
│ sem_close() │ Thread safety │ MT-Safe │
└─────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
POSIX.1-2001.
All open named semaphores are automatically closed on process
termination, or upon execve(2).
sem_getvalue(3), sem_open(3), sem_post(3), sem_unlink(3),
sem_wait(3), sem_overview(7)
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Linux man-pages 6.9.1 2024-05-02 sem_close(3)
Pages that refer to this page: sem_open(3), sem_overview(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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