'\" t
.\"     Title: atomic_dec_and_mutex_lock
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: September 2017
.\"    Manual: Mutex API reference
.\"    Source: Kernel Hackers Manual 4.12.13
.\"  Language: English
.\"
.TH "ATOMIC_DEC_AND_MUTEX" "9" "September 2017" "Kernel Hackers Manual 4\&.12\&" "Mutex API reference"
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.SH "NAME"
atomic_dec_and_mutex_lock \- return holding mutex if we dec to 0
.SH "SYNOPSIS"
.HP \w'int\ atomic_dec_and_mutex_lock('u
.BI "int atomic_dec_and_mutex_lock(atomic_t\ *\ " "cnt" ", struct\ mutex\ *\ " "lock" ");"
.SH "ARGUMENTS"
.PP
\fIatomic_t * cnt\fR
.RS 4
the atomic which we are to dec
.RE
.PP
\fIstruct mutex * lock\fR
.RS 4
the mutex to return holding if we dec to 0
.RE
.SH "DESCRIPTION"
.PP
return true and hold lock if we dec to 0, return false otherwise
.SH "AUTHOR"
.PP
\fBRusty Russell\fR <\&rusty@rustcorp.com.au\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br