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.TH "MPI_T_CVAR_GET_NUM" "3" "Apr 11, 2024" "" "Open MPI"
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\fI\%MPI_T_cvar_get_num\fP — Query the number of control variables
.SH SYNTAX
.SS C Syntax
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.EX
#include <mpi.h>

int MPI_T_cvar_get_num(int *num_cvar)
.EE
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.SH OUTPUT PARAMETERS
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.IP \(bu 2
\fBnum_cvar\fP: Current number of control variables.
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.SH DESCRIPTION
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\fI\%MPI_T_cvar_get_num\fP can be used to query the current number of control
variables. The number of control variables may increase throughout the
execution of the process but will never decrease.
.SH ERRORS
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\fI\%MPI_T_cvar_get_num\fP will fail if:
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\fBMPI_T_ERR_NOT_INITIALIZED\fP: The MPI Tools interface not initialized
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.SH COPYRIGHT
2003-2024, The Open MPI Community
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