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.TH "MPI_T_CVAR_READ" "3" "Apr 11, 2024" "" "Open MPI"
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\fI\%MPI_T_cvar_read\fP — Read the value of a control variable
.SH SYNTAX
.SS C Syntax
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.INDENT 3.5
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.EX
#include <mpi.h>

int MPI_T_cvar_read(MPI_T_cvar_handle handle, const void *buf)
.EE
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.SH INPUT PARAMETERS
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.IP \(bu 2
\fBhandle\fP: Handle of the control variable to be read.
.IP \(bu 2
\fBbuf\fP: Initial address of storage location for variable value.
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.SH DESCRIPTION
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\fI\%MPI_T_cvar_read\fP reads the value of the control variable identified by
the handle specified in \fIhandle\fP and stores the value in the buffer
pointed to by \fIbuf\fP\&. The caller must ensure that the buffer pointed to
by \fIbuf\fP is large enough to hold the entire value of the control
variable.
.SH ERRORS
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\fI\%MPI_T_cvar_read\fP will fail if:
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.IP \(bu 2
\fBMPI_T_ERR_NOT_INITIALIZED\fP: The MPI Tools interface not initialized
.IP \(bu 2
\fBMPI_T_ERR_INVALID_HANDLE\fP: The handle is invalid
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\fBSEE ALSO:\fP
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.IP \(bu 2
\fI\%MPI_T_cvar_handle_alloc\fP
.IP \(bu 2
\fI\%MPI_T_cvar_get_info\fP
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.SH COPYRIGHT
2003-2024, The Open MPI Community
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