.\" -*- nroff -*-
.\" Copyright 2013 Los Alamos National Security, LLC. All rights reserved.
.\" Copyright (c) 2010-2014 Cisco Systems, Inc.  All rights reserved.
.\" Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.\" $COPYRIGHT$
.TH MPI_Bsend_init 3 "May 26, 2022" "4.1.4" "Open MPI"
.SH NAME
\fBMPI_Bsend_init\fP \- Builds a handle for a buffered send.

.SH SYNTAX
.ft R
.SH C Syntax
.nf
#include <mpi.h>
int MPI_Bsend_init(const void \fI*buf\fP, int\fI count\fP, MPI_Datatype\fI datatype\fP,
	int\fI dest\fP, int\fI tag\fP, MPI_Comm\fI comm\fP, MPI_Request\fI *request\fP)

.fi
.SH Fortran Syntax
.nf
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_BSEND_INIT(\fIBUF\fP,\fI COUNT\fP, \fIDATATYPE\fP,\fI DEST\fP,\fI TAG\fP,\fI COMM\fP,\fI REQUEST\fP,
		\fIIERROR\fP)
	<type>	\fIBUF\fP(\fI*\fP)
	INTEGER	\fICOUNT\fP,\fI DATATYPE\fP, \fIDEST\fP,\fI TAG\fP,
	INTEGER	\fICOMM\fP,\fI REQUEST\fP,\fI IERROR

.fi
.SH Fortran 2008 Syntax
.nf
USE mpi_f08
MPI_Bsend_init(\fIbuf\fP, \fIcount\fP, \fIdatatype\fP, \fIdest\fP, \fItag\fP, \fIcomm\fP, \fIrequest\fP, \fIierror\fP)
	TYPE(*), DIMENSION(..), INTENT(IN), ASYNCHRONOUS :: \fIbuf\fP
	INTEGER, INTENT(IN) :: \fIcount\fP, \fIdest\fP, \fItag\fP
	TYPE(MPI_Datatype), INTENT(IN) :: \fIdatatype\fP
	TYPE(MPI_Comm), INTENT(IN) :: \fIcomm\fP
	TYPE(MPI_Request), INTENT(OUT) :: \fIrequest\fP
	INTEGER, OPTIONAL, INTENT(OUT) :: \fIierror\fP

.fi
.SH C++ Syntax
.nf
#include <mpi.h>
Prequest Comm::Bsend_init(const void* \fIbuf\fP, int \fIcount\fP, const
	Datatype& \fIdatatype\fP, int \fIdest\fP, int \fItag\fP) const

.fi
.SH INPUT PARAMETERS
.ft R
.TP 1i
buf
Initial address of send buffer (choice).
.TP 1i
count
Number of elements sent (integer).
.TP 1i
datatype
Type of each element (handle).
.TP 1i
dest
Rank of destination (integer).
.TP 1i
tag
Message tag (integer).
.TP 1i
comm
Communicator (handle).

.SH OUTPUT PARAMETERS
.ft R
.TP 1i
request
Communication request (handle).
.ft R
.TP 1i
IERROR
Fortran only: Error status (integer).

.SH DESCRIPTION
.ft R
Creates a persistent communication request for a buffered mode send, and binds to it all the arguments of a send operation.
.sp
A communication (send or receive) that uses a persistent request is initiated by the function MPI_Start.

.SH ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object.
.sp
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

.SH SEE ALSO
.ft R
.nf
MPI_Send_init
MPI_Ssend_init
MPI_Rsend_init
MPI_Recv_init
MPI_Start
MPI_Startall