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[src/trunk]: src Initial documentation of the internal syscalls that implemen...
details: https://anonhg.NetBSD.org/src/rev/e3974b13d32a
branches: trunk
changeset: 812059:e3974b13d32a
user: pgoyette <pgoyette%NetBSD.org@localhost>
date: Sun Nov 29 06:10:01 2015 +0000
description:
Initial documentation of the internal syscalls that implement the librt
posix semaphores. As requested in PR kern/37427
XXX Feel free to expand this page!
diffstat:
distrib/sets/lists/comp/mi | 35 ++++++++++++++++-
lib/libc/sys/Makefile.inc | 14 +++++-
lib/libc/sys/_ksem.2 | 97 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 143 insertions(+), 3 deletions(-)
diffs (199 lines):
diff -r 52fdfeb12cb8 -r e3974b13d32a distrib/sets/lists/comp/mi
--- a/distrib/sets/lists/comp/mi Sun Nov 29 00:34:39 2015 +0000
+++ b/distrib/sets/lists/comp/mi Sun Nov 29 06:10:01 2015 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.2007 2015/11/24 23:33:46 christos Exp $
+# $NetBSD: mi,v 1.2008 2015/11/29 06:10:01 pgoyette Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
./etc/mtree/set.comp comp-sys-root
@@ -3946,6 +3946,17 @@
./usr/share/man/cat2/__quotactl.0 comp-c-catman .cat
./usr/share/man/cat2/__syscall.0 comp-c-catman .cat
./usr/share/man/cat2/_exit.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_close.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_destroy.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_getvalue.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_init.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_open.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_post.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_timedwait.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_trywait.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_unlink.0 comp-c-catman .cat
+./usr/share/man/cat2/_ksem_wait.0 comp-c-catman .cat
./usr/share/man/cat2/_lwp_continue.0 comp-c-catman .cat
./usr/share/man/cat2/_lwp_create.0 comp-c-catman .cat
./usr/share/man/cat2/_lwp_ctl.0 comp-c-catman .cat
@@ -10987,6 +10998,17 @@
./usr/share/man/html2/__quotactl.html comp-c-htmlman html
./usr/share/man/html2/__syscall.html comp-c-htmlman html
./usr/share/man/html2/_exit.html comp-c-htmlman html
+./usr/share/man/html2/_ksem.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_close.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_destroy.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_getvalue.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_init.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_open.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_post.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_timedwait.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_trywait.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_unlink.html comp-c-htmlman html
+./usr/share/man/html2/_ksem_wait.html comp-c-htmlman html
./usr/share/man/html2/_lwp_continue.html comp-c-htmlman html
./usr/share/man/html2/_lwp_create.html comp-c-htmlman html
./usr/share/man/html2/_lwp_ctl.html comp-c-htmlman html
@@ -17791,6 +17813,17 @@
./usr/share/man/man2/__quotactl.2 comp-c-man .man
./usr/share/man/man2/__syscall.2 comp-c-man .man
./usr/share/man/man2/_exit.2 comp-c-man .man
+./usr/share/man/man2/_ksem.2 comp-c-man .man
+./usr/share/man/man2/_ksem_close.2 comp-c-man .man
+./usr/share/man/man2/_ksem_destroy.2 comp-c-man .man
+./usr/share/man/man2/_ksem_getvalue.2 comp-c-man .man
+./usr/share/man/man2/_ksem_init.2 comp-c-man .man
+./usr/share/man/man2/_ksem_open.2 comp-c-man .man
+./usr/share/man/man2/_ksem_post.2 comp-c-man .man
+./usr/share/man/man2/_ksem_timedwait.2 comp-c-man .man
+./usr/share/man/man2/_ksem_trywait.2 comp-c-man .man
+./usr/share/man/man2/_ksem_unlink.2 comp-c-man .man
+./usr/share/man/man2/_ksem_wait.2 comp-c-man .man
./usr/share/man/man2/_lwp_continue.2 comp-c-man .man
./usr/share/man/man2/_lwp_create.2 comp-c-man .man
./usr/share/man/man2/_lwp_ctl.2 comp-c-man .man
diff -r 52fdfeb12cb8 -r e3974b13d32a lib/libc/sys/Makefile.inc
--- a/lib/libc/sys/Makefile.inc Sun Nov 29 00:34:39 2015 +0000
+++ b/lib/libc/sys/Makefile.inc Sun Nov 29 06:10:01 2015 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.inc,v 1.227 2015/01/31 23:10:56 christos Exp $
+# $NetBSD: Makefile.inc,v 1.228 2015/11/29 06:10:01 pgoyette Exp $
# @(#)Makefile.inc 8.3 (Berkeley) 10/24/94
# sys sources
@@ -249,7 +249,7 @@
getitimer.2 getlogin.2 getpeername.2 getpgrp.2 getpid.2 \
getpriority.2 getrlimit.2 getrusage.2 getsid.2 getsockname.2 \
getsockopt.2 gettimeofday.2 getuid.2 intro.2 ioctl.2 issetugid.2 \
- kill.2 kqueue.2 ktrace.2 \
+ kill.2 kqueue.2 ktrace.2 _ksem.2 \
lfs_bmapv.2 lfs_markv.2 lfs_segclean.2 lfs_segwait.2 \
link.2 listen.2 lseek.2 \
_lwp_create.2 _lwp_ctl.2 _lwp_detach.2 _lwp_exit.2 \
@@ -321,6 +321,16 @@
MLINKS+=getuid.2 geteuid.2
MLINKS+=intro.2 errno.2
MLINKS+=kqueue.2 kevent.2
+MLINKS+=_ksem.2 _ksem_open.2
+MLINKS+=_ksem.2 _ksem_close.2
+MLINKS+=_ksem.2 _ksem_init.2
+MLINKS+=_ksem.2 _ksem_destroy.2
+MLINKS+=_ksem.2 _ksem_getvalue.2
+MLINKS+=_ksem.2 _ksem_post.2
+MLINKS+=_ksem.2 _ksem_wait.2
+MLINKS+=_ksem.2 _ksem_timedwait.2
+MLINKS+=_ksem.2 _ksem_trywait.2
+MLINKS+=_ksem.2 _ksem_unlink.2
MLINKS+=ktrace.2 fktrace.2
MLINKS+=lseek.2 seek.2
MLINKS+=link.2 linkat.2
diff -r 52fdfeb12cb8 -r e3974b13d32a lib/libc/sys/_ksem.2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/sys/_ksem.2 Sun Nov 29 06:10:01 2015 +0000
@@ -0,0 +1,97 @@
+.\" $NetBSD: _ksem.2,v 1.1 2015/11/29 06:10:01 pgoyette 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
+.\" 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
+.In 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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