'\" t
.\"     Title: mutex_trylock
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: Mutex API reference
.\"    Source: Kernel Hackers Manual 4.11.6
.\"  Language: English
.\"
.TH "MUTEX_TRYLOCK" "9" "July 2017" "Kernel Hackers Manual 4\&.11\&" "Mutex API reference"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
mutex_trylock \- try to acquire the mutex, without waiting
.SH "SYNOPSIS"
.HP \w'int\ __sched\ mutex_trylock('u
.BI "int __sched mutex_trylock(struct\ mutex\ *\ " "lock" ");"
.SH "ARGUMENTS"
.PP
\fIstruct mutex * lock\fR
.RS 4
the mutex to be acquired
.RE
.SH "DESCRIPTION"
.PP
Try to acquire the mutex atomically\&. Returns 1 if the mutex has been acquired successfully, and 0 on contention\&.
.SH "NOTE"
.PP
this function follows the
\fBspin_trylock\fR
convention, so it is negated from the
\fBdown_trylock\fR
return values! Be careful about this when converting semaphore users to mutexes\&.
.PP
This function must not be used in interrupt context\&. The mutex must be released by the same task that acquired it\&.
.SH "AUTHOR"
.PP
\fBRusty Russell\fR <\&rusty@rustcorp.com.au\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br