63 строки
1.9 KiB
Groff
63 строки
1.9 KiB
Groff
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.\"Copyright 2006, Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.TH MPI_Sizeof 3OpenMPI "September 2006" "Open MPI 1.2" " "
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.SH NAME
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\fBMPI_Sizeof\fP \- Returns the size, in bytes, of the given type
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.SH SYNTAX
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.ft R
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.SH Fortran Syntax
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.nf
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INCLUDE 'mpif.h'
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MPI_SIZEOF(\fIX, SIZE, IERROR\fP)
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<type> \fIX\fP
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INTEGER \fISIZE, IERROR\fP
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.SH INPUT PARAMETER
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.ft R
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.TP 1i
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X
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A Fortran variable of numeric intrisic type (choice).
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1i
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SIZE
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Size of machine representation of that type (integer).
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.ft R
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.TP 1i
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IERROR
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Error status (integer).
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.SH DESCRIPTION
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.ft R
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MPI_SIZEOF returns the size (in bytes) of the machine representation
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of the given variable. It is a generic Fortran type and has a Fortran
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binding only. This routine is similar to the sizeof builtin in
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C/C++. However, if given an array argument, it returns the size of the
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base element, not the size of the whole array.
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.SH NOTES
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This function is not available in C/C++ because it is not necessary.
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.SH ERRORS
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.ft R
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Almost all MPI routines return an error value; C routines as
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the value of the function and Fortran routines in the last argument. C++
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functions do not return errors. If the default error handler is set to
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MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
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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
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I/O function errors. The error handler may be changed with
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MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
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may be used to cause error values to be returned. Note that MPI does not
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guarantee that an MPI program can continue past an error.
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.sp
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See the MPI man page for a full list of MPI error codes.
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' @(#)MPI_Sizeof.3 1.4 06/03/09
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