1.\" $Darwin$ 2.\" 3.\" Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. 4.\" 5.\" @APPLE_LICENSE_HEADER_START@ 6.\" 7.\" The contents of this file constitute Original Code as defined in and 8.\" are subject to the Apple Public Source License Version 1.1 (the 9.\" "License"). You may not use this file except in compliance with the 10.\" License. Please obtain a copy of the License at 11.\" http://www.apple.com/publicsource and read it before using this file. 12.\" 13.\" This Original Code and all software distributed under the License are 14.\" distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15.\" EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16.\" INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17.\" FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 18.\" License for the specific language governing rights and limitations 19.\" under the License. 20.\" 21.\" @APPLE_LICENSE_HEADER_END@ 22.\" 23.Dd June 8, 2000 24.Dt SEM_CLOSE 2 25.Os Darwin 26.Sh NAME 27.Nm sem_close 28.Nd close a named semaphore 29.Sh SYNOPSIS 30.Fd #include <semaphore.h> 31.Ft int 32.Fn sem_close "sem_t *sem" 33.Sh DESCRIPTION 34The system resources associated with the named semaphore referenced by 35.Fa sem 36are deallocated and the descriptor is invalidated. 37.Pp 38If successful, 39.Fn sem_close 40will return 0. Otherwise, -1 is returned and 41.Va errno 42is set. 43.Sh ERRORS 44.Fn sem_close 45succeeds unless: 46.Bl -tag -width Er 47.It Bq Er EINVAL 48.Fa sem 49is not a valid semaphore descriptor. 50.El 51.Sh SEE ALSO 52.Xr sem_open 2 , 53.Xr sem_unlink 2 , 54.Xr semctl 2 , 55.Xr semget 2 , 56.Xr semop 2 57.Sh HISTORY 58.Fn sem_close 59is specified in the POSIX Realtime Extension (1003.1b-1993/1003.1i-1995). 60