$NetBSD: _ksem.2,v 1.2 2015/11/29 21:38:10 wiz Exp $
Copyright (c) 2015 The NetBSD Foundation, Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.Dd November 30, 2015 .Dt _KSEM 2 .Os .Sh NAME .Nm _ksem , .Nm _ksem_init , .Nm _ksem_open , .Nm _ksem_close , .Nm _ksem_unlink , .Nm _ksem_destroy , .Nm _ksem_getvalue , .Nm _ksem_post , .Nm _ksem_wait , .Nm _ksem_timedwait , .Nm _ksem_trywait .Nd back-end implementation for POSIX semaphores .Sh SYNOPSIS n sys/ksem.h .Ft int .Fn _ksem_init "int value" "intptr_t *idp" .Ft int .Fn _ksem_open "const char *name" "int oflag" "mode_t mode" "unsigned int value" "intptr_t *idp" .Ft int .Fn _ksem_close "intptr_t id" .Ft int .Fn _ksem_unlink "const char *name" .Ft int .Fn _ksem_destroy "intptr_t id" .Ft int .Fn _ksem_getvalue "intptr_t id" "unsigned int *value" .Ft int .Fn _ksem_post "intptr_t id" .Ft int .Fn _ksem_wait "intptr_t id" .Ft int .Fn _ksem_timedwait "intptr_t id" "const struct timespec *abstime" .Ft int .Fn _ksem_trywait "intptr_t id" .Sh DESCRIPTION The .Fn _ksem_* family of system calls provide the kernel implementation of POSIX semaphores. .Sh RETURN VALUES Successful calls to the .Fn _ksem_* system calls return a value of zero. Otherwise, -1 is returned and .Va errno is set to provide more information. .Sh ERRORS Please see the section 3 manual pages for specific error information. .Sh SEE ALSO .Xr sem_close 3 , .Xr sem_destroy 3 , .Xr sem_getvalue 3 , .Xr sem_init 3 , .Xr sem_open 3 , .Xr sem_post 3 , .Xr sem_unlink 3 , .Xr sem_wait 3 , .Xr sem 4 .Sh HISTORY Most of the .Fn _ksem_* system calls first appeared in .Nx 2.0 . The .Fn _ksem_timedwait system call first appeared in .Nx 5.0 .
Copyright (c) 2015 The NetBSD Foundation, Inc.
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, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``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 FOUNDATION OR CONTRIBUTORS
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.
.Dd November 30, 2015 .Dt _KSEM 2 .Os .Sh NAME .Nm _ksem , .Nm _ksem_init , .Nm _ksem_open , .Nm _ksem_close , .Nm _ksem_unlink , .Nm _ksem_destroy , .Nm _ksem_getvalue , .Nm _ksem_post , .Nm _ksem_wait , .Nm _ksem_timedwait , .Nm _ksem_trywait .Nd back-end implementation for POSIX semaphores .Sh SYNOPSIS n sys/ksem.h .Ft int .Fn _ksem_init "int value" "intptr_t *idp" .Ft int .Fn _ksem_open "const char *name" "int oflag" "mode_t mode" "unsigned int value" "intptr_t *idp" .Ft int .Fn _ksem_close "intptr_t id" .Ft int .Fn _ksem_unlink "const char *name" .Ft int .Fn _ksem_destroy "intptr_t id" .Ft int .Fn _ksem_getvalue "intptr_t id" "unsigned int *value" .Ft int .Fn _ksem_post "intptr_t id" .Ft int .Fn _ksem_wait "intptr_t id" .Ft int .Fn _ksem_timedwait "intptr_t id" "const struct timespec *abstime" .Ft int .Fn _ksem_trywait "intptr_t id" .Sh DESCRIPTION The .Fn _ksem_* family of system calls provide the kernel implementation of POSIX semaphores. .Sh RETURN VALUES Successful calls to the .Fn _ksem_* system calls return a value of zero. Otherwise, -1 is returned and .Va errno is set to provide more information. .Sh ERRORS Please see the section 3 manual pages for specific error information. .Sh SEE ALSO .Xr sem_close 3 , .Xr sem_destroy 3 , .Xr sem_getvalue 3 , .Xr sem_init 3 , .Xr sem_open 3 , .Xr sem_post 3 , .Xr sem_unlink 3 , .Xr sem_wait 3 , .Xr sem 4 .Sh HISTORY Most of the .Fn _ksem_* system calls first appeared in .Nx 2.0 . The .Fn _ksem_timedwait system call first appeared in .Nx 5.0 .
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