| rmlock.9 (212112) | rmlock.9 (227588) |
|---|---|
| 1.\" Copyright (c) 2007 Stephan Uphoff <ups@FreeBSD.org> 2.\" Copyright (c) 2006 Gleb Smirnoff <glebius@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" | 1.\" Copyright (c) 2007 Stephan Uphoff <ups@FreeBSD.org> 2.\" Copyright (c) 2006 Gleb Smirnoff <glebius@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" |
| 26.\" $FreeBSD: head/share/man/man9/rmlock.9 212112 2010-09-01 19:50:03Z mlaier $ | 26.\" $FreeBSD: head/share/man/man9/rmlock.9 227588 2011-11-16 21:51:17Z pjd $ |
| 27.\" 28.\" Based on rwlock.9 man page | 27.\" 28.\" Based on rwlock.9 man page |
| 29.Dd November 10, 2007 | 29.Dd November 16, 2011 |
| 30.Dt RMLOCK 9 31.Os 32.Sh NAME 33.Nm rmlock , 34.Nm rm_init , 35.Nm rm_init_flags , 36.Nm rm_destroy , 37.Nm rm_rlock , --- 20 unchanged lines hidden (view full) --- 58.Fn rm_try_rlock "struct rmlock *rm" "struct rm_priotracker* tracker" 59.Ft void 60.Fn rm_wlock "struct rmlock *rm" 61.Ft void 62.Fn rm_runlock "struct rmlock *rm" "struct rm_priotracker* tracker" 63.Ft void 64.Fn rm_wunlock "struct rmlock *rm" 65.Ft int | 30.Dt RMLOCK 9 31.Os 32.Sh NAME 33.Nm rmlock , 34.Nm rm_init , 35.Nm rm_init_flags , 36.Nm rm_destroy , 37.Nm rm_rlock , --- 20 unchanged lines hidden (view full) --- 58.Fn rm_try_rlock "struct rmlock *rm" "struct rm_priotracker* tracker" 59.Ft void 60.Fn rm_wlock "struct rmlock *rm" 61.Ft void 62.Fn rm_runlock "struct rmlock *rm" "struct rm_priotracker* tracker" 63.Ft void 64.Fn rm_wunlock "struct rmlock *rm" 65.Ft int |
| 66.Fn rm_wowned "struct rmlock *rm" | 66.Fn rm_wowned "const struct rmlock *rm" |
| 67.In sys/kernel.h 68.Fn RM_SYSINIT "name" "struct rmlock *rm" "const char *desc" "int opts" 69.Sh DESCRIPTION 70Mostly reader locks allow shared access to protected data by multiple threads, 71or exclusive access by a single thread. 72The threads with shared access are known as 73.Em readers 74since they only read the protected data. --- 128 unchanged lines hidden (view full) --- 203This function releases an exclusive lock previously acquired by 204.Fn rm_wlock . 205.It Fn rm_destroy "struct rmlock *rm" 206This functions destroys a lock previously initialized with 207.Fn rm_init . 208The 209.Fa rm 210lock must be unlocked. | 67.In sys/kernel.h 68.Fn RM_SYSINIT "name" "struct rmlock *rm" "const char *desc" "int opts" 69.Sh DESCRIPTION 70Mostly reader locks allow shared access to protected data by multiple threads, 71or exclusive access by a single thread. 72The threads with shared access are known as 73.Em readers 74since they only read the protected data. --- 128 unchanged lines hidden (view full) --- 203This function releases an exclusive lock previously acquired by 204.Fn rm_wlock . 205.It Fn rm_destroy "struct rmlock *rm" 206This functions destroys a lock previously initialized with 207.Fn rm_init . 208The 209.Fa rm 210lock must be unlocked. |
| 211.It Fn rm_wowned "struct rmlock *rm" | 211.It Fn rm_wowned "const struct rmlock *rm" |
| 212This function returns a non-zero value if the current thread owns an 213exclusive lock on 214.Fa rm . 215.El 216.Sh SEE ALSO 217.Xr locking 9 , 218.Xr mutex 9 , 219.Xr panic 9 , --- 37 unchanged lines hidden --- | 212This function returns a non-zero value if the current thread owns an 213exclusive lock on 214.Fa rm . 215.El 216.Sh SEE ALSO 217.Xr locking 9 , 218.Xr mutex 9 , 219.Xr panic 9 , --- 37 unchanged lines hidden --- |