'\" t
.\"     Title: atomic_dec
.\"    Author: The Khronos Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 01/14/2021
.\"    Manual: OpenCL Manual
.\"    Source: The Khronos Group
.\"  Language: English
.\"
.TH "ATOMIC_DEC" "3clc" "01/14/2021" "The Khronos Group" "OpenCL Manual"
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.SH "NAME"
atomic_dec \- atomic_dec functions\&.
.SH ""
.HP \w'int\ atomic_dec('u
.BI "int atomic_dec(volatile\ \fBglobal\fR(3clc)\ int\ *" "p" ");"
.HP \w'unsigned\ int\ atomic_dec('u
.BI "unsigned int atomic_dec(volatile\ \fBglobal\fR(3clc)\ unsigned\ int\ *" "p" ");"
.HP \w'int\ atomic_dec('u
.BI "int atomic_dec(volatile\ \fBlocal\fR(3clc)\ int\ *" "p" ");"
.HP \w'unsigned\ int\ atomic_dec('u
.BI "unsigned int atomic_dec(volatile\ \fBlocal\fR(3clc)\ unsigned\ int\ *" "p" ");"
.SH "DESCRIPTION"
.PP
Read the 32\-bit value (referred to as
\fIold\fR) stored at location pointed by
\fIp\fR\&. Compute (\fIold\fR
\- 1) and store result at location pointed by
\fIp\fR\&. The function returns
\fIold\fR\&.
.PP
A 64\-bit version of this function,
\fBatom_dec\fR(3clc), is enabled by
\fBcl_khr_int64_base_atomics\fR(3clc)\&.
.SH "SPECIFICATION"
.PP
\m[blue]\fBOpenCL Specification\fR\m[]\&\s-2\u[1]\d\s+2
.SH "SEE ALSO"
.PP
\fBatomicFunctions\fR(3clc),
\fBatom_dec\fR(3clc)
.SH "AUTHORS"
.PP
\fBThe Khronos Group\fR
.SH "COPYRIGHT"
.br
Copyright \(co 2007-2011 The Khronos Group Inc.
.br
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the "Materials"), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.
.sp
.SH "NOTES"
.IP " 1." 4
OpenCL Specification
.RS 4
\%page 279, section 6.12.11 - Atomic Functions for 32-bit integers
.RE