projects / thirdparty / man-pages.git / blame
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|---|---|---|
| c11b1abf | 1 | .\" Copyright (C) 2006 Michael Kerrisk <mtk.manpages@gmail.com> |
| 2c731798 | 2 | .\" |
| 5fbde956 | 3 | .\" SPDX-License-Identifier: Linux-man-pages-copyleft |
| 2c731798 | 4 | .\" |
| 4c1c5274 | 5 | .TH sem_close 3 (date) "Linux man-pages (unreleased)" |
| 2c731798 MK |
6 | .SH NAME |
| 7 | sem_close \- close a named semaphore | |
| ad3209fc AC |
8 | .SH LIBRARY |
| 9 | POSIX threads library | |
| 8fc3b2cf | 10 | .RI ( libpthread ", " \-lpthread ) |
| 2c731798 MK |
11 | .SH SYNOPSIS |
| 12 | .nf | |
| 13 | .B #include <semaphore.h> | |
| 68e4db0a | 14 | .PP |
| 2c731798 MK |
15 | .BI "int sem_close(sem_t *" sem ); |
| 16 | .fi | |
| 17 | .SH DESCRIPTION | |
| 18 | .BR sem_close () | |
| 19 | closes the named semaphore referred to by | |
| 20 | .IR sem , | |
| c13182ef | 21 | allowing any resources that the system has allocated to |
| 011ed91c | 22 | the calling process for this semaphore to be freed. |
| 2c731798 MK |
23 | .SH RETURN VALUE |
| 24 | On success | |
| 25 | .BR sem_close () | |
| 26 | returns 0; on error, \-1 is returned, with | |
| c13182ef | 27 | .I errno |
| 2c731798 MK |
28 | set to indicate the error. |
| 29 | .SH ERRORS | |
| 30 | .TP | |
| 31 | .B EINVAL | |
| 32 | .I sem | |
| 33 | is not a valid semaphore. | |
| 011b5251 ZL |
34 | .SH ATTRIBUTES |
| 35 | For an explanation of the terms used in this section, see | |
| 36 | .BR attributes (7). | |
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37 | .ad l |
| 38 | .nh | |
| 011b5251 ZL |
39 | .TS |
| 40 | allbox; | |
| c466875e | 41 | lbx lb lb |
| 011b5251 ZL |
42 | l l l. |
| 43 | Interface Attribute Value | |
| 44 | T{ | |
| 45 | .BR sem_close () | |
| 46 | T} Thread safety MT-Safe | |
| 47 | .TE | |
| c466875e MK |
48 | .hy |
| 49 | .ad | |
| 847e0d88 | 50 | .sp 1 |
| 3113c7f3 | 51 | .SH STANDARDS |
| 84295a7c | 52 | POSIX.1-2001, POSIX.1-2008. |
| 2b2581ee MK |
53 | .SH NOTES |
| 54 | All open named semaphores are automatically closed on process | |
| 55 | termination, or upon | |
| 56 | .BR execve (2). | |
| 47297adb | 57 | .SH SEE ALSO |
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58 | .BR sem_getvalue (3), |
| 59 | .BR sem_open (3), | |
| 60 | .BR sem_post (3), | |
| 61 | .BR sem_unlink (3), | |
| 62 | .BR sem_wait (3), | |
| 63 | .BR sem_overview (7) |