| sem_wait.3 (c130b9f1afa6ca453bbf6cd433e6d23d2b82d9bf) | sem_wait.3 (8916af883c4f1a6927393113da320c96ce6508c1) |
|---|---|
| 1.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 13 unchanged lines hidden (view full) --- 22.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 23.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 25.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27.\" 28.\" $FreeBSD$ 29.\" | 1.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 13 unchanged lines hidden (view full) --- 22.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 23.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 25.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27.\" 28.\" $FreeBSD$ 29.\" |
| 30.Dd February 15, 2000 | 30.Dd April 16, 2013 |
| 31.Dt SEM_WAIT 3 32.Os 33.Sh NAME 34.Nm sem_wait , 35.Nm sem_trywait 36.Nd decrement (lock) a semaphore 37.Sh LIBRARY 38.Lb libc --- 31 unchanged lines hidden (view full) --- 70.It Bq Er EINVAL 71The 72.Fa sem 73argument 74points to an invalid semaphore. 75.El 76.Pp 77Additionally, | 31.Dt SEM_WAIT 3 32.Os 33.Sh NAME 34.Nm sem_wait , 35.Nm sem_trywait 36.Nd decrement (lock) a semaphore 37.Sh LIBRARY 38.Lb libc --- 31 unchanged lines hidden (view full) --- 70.It Bq Er EINVAL 71The 72.Fa sem 73argument 74points to an invalid semaphore. 75.El 76.Pp 77Additionally, |
| 78.Fn sem_wait 79will fail if: 80.Bl -tag -width Er 81.Pp 82.It Bq Er EINTR 83A signal interrupted this function. 84.El 85Additionally, |
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| 78.Fn sem_trywait 79will fail if: 80.Bl -tag -width Er 81.It Bq Er EAGAIN 82The semaphore value was zero, and thus could not be decremented. 83.El 84.Sh SEE ALSO 85.Xr sem_getvalue 3 , 86.Xr sem_post 3 , 87.Xr sem_timedwait 3 , 88.Xr sem 4 89.Sh STANDARDS 90The 91.Fn sem_wait 92and 93.Fn sem_trywait 94functions conform to 95.St -p1003.1-96 . | 86.Fn sem_trywait 87will fail if: 88.Bl -tag -width Er 89.It Bq Er EAGAIN 90The semaphore value was zero, and thus could not be decremented. 91.El 92.Sh SEE ALSO 93.Xr sem_getvalue 3 , 94.Xr sem_post 3 , 95.Xr sem_timedwait 3 , 96.Xr sem 4 97.Sh STANDARDS 98The 99.Fn sem_wait 100and 101.Fn sem_trywait 102functions conform to 103.St -p1003.1-96 . |