'\"macro stdmacro
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.TH PMWHICHCONTEXT 3 "PCP" "Performance Co-Pilot"
.SH NAME
\f3pmWhichContext\f1 \- identify the current PMAPI context
.SH "C SYNOPSIS"
.ft 3
#include <pcp/pmapi.h>
.sp
int pmWhichContext(void);
.sp
cc ... \-lpcp
.ft 1
.SH DESCRIPTION
An application using the
Performance Metrics Application Programming Interface (PMAPI)
may manipulate several concurrent contexts,
each associated with a source of performance metrics, e.g. \c
.BR pmcd (1)
on some host, or an archive of performance metrics as created by
.BR pmlogger (1).
.PP
.B pmWhichContext
returns a handle for the current PMAPI context, that may
be used in the associated PMAPI routines that require a handle
to identify a PMAPI context.
.SH DIAGNOSTICS
.IP \f3PM_ERR_NOCONTEXT\f1
no current context
.SH SEE ALSO
.BR PMAPI (3),
.BR pmDestroyContext (3),
.BR pmDupContext (3),
.BR pmNewContext (3)
and
.BR pmUseContext (3).