93 строки
2.6 KiB
Groff
93 строки
2.6 KiB
Groff
.\"Copyright 2006, Sun Microsystems, Inc.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.TH MPI_Recv_init 3OpenMPI "September 2006" "Open MPI 1.2" " "
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.SH NAME
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\fBMPI_Recv_init\fP \- Builds a handle for a receive.
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.SH SYNTAX
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.ft R
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.SH C Syntax
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.nf
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#include <mpi.h>
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int MPI_Recv_init(void *\fIbuf\fP, int\fI count\fP, MPI_Datatype\fI datatype\fP,
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int\fI source\fP, int\fI tag\fP, MPI_Comm\fI comm\fP, MPI_Request\fI *request\fP)
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.SH Fortran Syntax
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.nf
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INCLUDE 'mpif.h'
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MPI_RECV_INIT(\fIBUF, COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST,
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IERROR\fP)
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<type> \fIBUF\fP(*)
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INTEGER \fICOUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST, IERROR\fP
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.SH C++ Syntax
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.nf
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#include <mpi.h>
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Prequest Comm::Recv_init(void* \fIbuf\fP, int \fIcount\fP, const
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Datatype& \fIdatatype\fP, int \fIsource\fP, int \fItag\fP) const
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.SH INPUT PARAMETERS
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.ft R
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.TP 1i
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count
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Maximum number of elements to receive (integer).
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.TP 1i
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datatype
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Type of each entry (handle).
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.TP 1i
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source
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Rank of source (integer).
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.TP 1i
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tag
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Message tag (integer).
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.TP 1i
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comm
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Communicator (handle).
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.SH INPUT/OUTPUT PARAMETER
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.TP 1i
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buf
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Initial address of receive buffer (choice).
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1i
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request
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Communication request (handle).
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.ft R
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.TP 1i
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IERROR
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Fortran only: Error status (integer).
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.SH DESCRIPTION
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.ft R
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Creates a persistent communication request for a receive operation. The argument \fIbuf\fP is marked as OUT because the user gives permission to write on the receive buffer by passing the argument to MPI_Recv_init.
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.sp
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A persistent communication request is inactive after it is created -- no active communication is attached to the request.
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.sp
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A communication (send or receive) that uses a persistent request is initiated by the function MPI_Start or MPI_Startall.
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.SH ERRORS
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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.
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.sp
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Before the error value is returned, the current MPI error handler is
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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.
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.SH SEE ALSO
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.ft R
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.sp
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MPI_Bsend_init
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.br
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MPI_Rsend_init
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.br
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MPI_Send_init
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.br
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MPI_Sssend_init
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.br
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MPI_Start
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.br
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MPI_Startall
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.br
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MPI_Request_free
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