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
9.\" the first lines of this file unmodified other than the possible
10.\" addition of one or more copyright notices.
11.\" 2. Redistributions in binary form must reproduce the above copyright
12.\" notice(s), this list of conditions and the following disclaimer in
13.\" the documentation and/or other materials provided with the
14.\" distribution.
15.\"
16.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
17.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
20.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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,
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| 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
9.\" the first lines of this file unmodified other than the possible
10.\" addition of one or more copyright notices.
11.\" 2. Redistributions in binary form must reproduce the above copyright
12.\" notice(s), this list of conditions and the following disclaimer in
13.\" the documentation and/or other materials provided with the
14.\" distribution.
15.\"
16.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
17.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
20.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\"
|
37.Sh SYNOPSIS
38.In semaphore.h
39.Ft int
40.Fn sem_destroy "sem_t *sem"
41.Sh DESCRIPTION
42The
43.Fn sem_destroy
44function destroys the unnamed semaphore pointed to by
45.Fa sem .
46After a successful call to
47.Fn sem_destroy ,
48.Fa sem
49is unusable until re-initialized by another call to
50.Fn sem_init .
51.Sh RETURN VALUES
52.Rv -std sem_destroy
53.Sh ERRORS
54The
55.Fn sem_destroy
56function will fail if:
57.Bl -tag -width Er
58.It Bq Er EINVAL
59.Fa sem
60points to an invalid semaphore.
61.It Bq Er EBUSY
62There are currently threads blocked on the semaphore that
63.Fa sem
64points to.
65.El
66.Sh SEE ALSO
67.Xr sem_init 3 ,
68.Xr sem 4
69.Sh STANDARDS
70The
71.Fn sem_destroy
72function conforms to
73.St -p1003.1-96 .
74.Pp
75POSIX does not define the behavior of
76.Fn sem_destroy
77if called while there are threads blocked on
78.Fa sem ,
79but this implementation is guaranteed to return -1 and set
80.Va errno
81to
82.Er EBUSY
83if there are threads blocked on
84.Fa sem .
| 37.Sh SYNOPSIS
38.In semaphore.h
39.Ft int
40.Fn sem_destroy "sem_t *sem"
41.Sh DESCRIPTION
42The
43.Fn sem_destroy
44function destroys the unnamed semaphore pointed to by
45.Fa sem .
46After a successful call to
47.Fn sem_destroy ,
48.Fa sem
49is unusable until re-initialized by another call to
50.Fn sem_init .
51.Sh RETURN VALUES
52.Rv -std sem_destroy
53.Sh ERRORS
54The
55.Fn sem_destroy
56function will fail if:
57.Bl -tag -width Er
58.It Bq Er EINVAL
59.Fa sem
60points to an invalid semaphore.
61.It Bq Er EBUSY
62There are currently threads blocked on the semaphore that
63.Fa sem
64points to.
65.El
66.Sh SEE ALSO
67.Xr sem_init 3 ,
68.Xr sem 4
69.Sh STANDARDS
70The
71.Fn sem_destroy
72function conforms to
73.St -p1003.1-96 .
74.Pp
75POSIX does not define the behavior of
76.Fn sem_destroy
77if called while there are threads blocked on
78.Fa sem ,
79but this implementation is guaranteed to return -1 and set
80.Va errno
81to
82.Er EBUSY
83if there are threads blocked on
84.Fa sem .
|