Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
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Redistribution and use in source and binary forms, with or without
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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$FreeBSD$
.Dd February 15, 2000 .Dt SEM_DESTROY 3 .Os .Sh NAME .Nm sem_destroy .Nd destroy an unnamed semaphore .Sh LIBRARY .Lb libc .Sh SYNOPSIS n semaphore.h .Ft int .Fn sem_destroy "sem_t *sem" .Sh DESCRIPTION The .Fn sem_destroy function destroys the unnamed semaphore pointed to by .Fa sem . After a successful call to .Fn sem_destroy , .Fa sem is unusable until re-initialized by another call to .Xr sem_init 3 . .Sh RETURN VALUES .Rv -std sem_destroy .Sh ERRORS The .Fn sem_destroy function will fail if: l -tag -width Er t Bq Er EINVAL The .Fa sem argument points to an invalid semaphore. t Bq Er EBUSY There are currently threads blocked on the semaphore that .Fa sem points to. .El .Sh SEE ALSO .Xr sem_init 3 , .Xr sem 4 .Sh STANDARDS The .Fn sem_destroy function conforms to .St -p1003.1-96 .
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice(s), this list of conditions and the following disclaimer as
the first lines of this file unmodified other than the possible
addition of one or more copyright notices.
2. Redistributions in binary form must reproduce the above copyright
notice(s), this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
$FreeBSD$
.Dd February 15, 2000 .Dt SEM_DESTROY 3 .Os .Sh NAME .Nm sem_destroy .Nd destroy an unnamed semaphore .Sh LIBRARY .Lb libc .Sh SYNOPSIS n semaphore.h .Ft int .Fn sem_destroy "sem_t *sem" .Sh DESCRIPTION The .Fn sem_destroy function destroys the unnamed semaphore pointed to by .Fa sem . After a successful call to .Fn sem_destroy , .Fa sem is unusable until re-initialized by another call to .Xr sem_init 3 . .Sh RETURN VALUES .Rv -std sem_destroy .Sh ERRORS The .Fn sem_destroy function will fail if: l -tag -width Er t Bq Er EINVAL The .Fa sem argument points to an invalid semaphore. t Bq Er EBUSY There are currently threads blocked on the semaphore that .Fa sem points to. .El .Sh SEE ALSO .Xr sem_init 3 , .Xr sem 4 .Sh STANDARDS The .Fn sem_destroy function conforms to .St -p1003.1-96 .
p .Tn POSIX does not define the behavior of .Fn sem_destroy if called while there are threads blocked on .Fa sem , but this implementation is guaranteed to return -1 and set .Va errno to .Er EBUSY if there are threads blocked on .Fa sem .