'\"macro stdmacro
.\"
.\" Copyright (c) 2009 Max Matveev
.\" Copyright (c) 2009 Aconex.  All Rights Reserved.
.\"
.\" This program is free software; you can redistribute it and/or modify it
.\" under the terms of the GNU General Public License as published by the
.\" Free Software Foundation; either version 2 of the License, or (at your
.\" option) any later version.
.\"
.\" This program is distributed in the hope that it will be useful, but
.\" WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
.\" or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
.\" for more details.
.\"
.\"
.TH MMV_INC_VALUE 3 "" "Performance Co-Pilot"
.SH NAME
\f3mmv_inc_value\f1 \- update a value in a Memory Mapped Value file
.SH "C SYNOPSIS"
.ft 3
#include <pcp/pmapi.h>
.br
#include <pcp/mmv_stats.h>
.sp
void mmv_inc_value(void *\fIaddr\fP, pmAtomValue *\fIval\fP, double \fIinc\fP);
.sp
cc ... \-lpcp_mmv \-lpcp
.ft 1
.SH DESCRIPTION
\f3mmv_inc_value\f1 provides a convenient way of updating a value
returned by the \f3mmv_lookup_value_desc\f1.
\f2addr\f1 is the address returned from \f3mmv_stats_init\f1().
.P
The value of the \f2inc\f1 is internally cast to match the type of
the metric and then added to the previous value of the metric.
.SH SEE ALSO
.BR mmv_stats_init (3),
.BR mmv_lookup_value_desc (3)
and
.BR mmv (5).