69 строки
1.7 KiB
Plaintext
69 строки
1.7 KiB
Plaintext
.\" Copyright 2010 Cisco Systems, Inc. All rights reserved.
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.\" Copyright 2006-2008 Sun Microsystems, Inc.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.TH MPI_Is_thread_main 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_Is_thread_main\fP \- Determines if thread called MPI_Init
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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_Is_thread_main(int *\fIflag\fP)
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.fi
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.SH Fortran Syntax
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.nf
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INCLUDE 'mpif.h'
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MPI_IS_THREAD_MAIN(\fIFLAG, IERROR\fP)
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LOGICAL \fIFLAG\fP
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INTEGER \fIIERROR\fP
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.fi
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.SH C++ Syntax
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.nf
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#include <mpi.h>
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bool MPI::Is_thread_main()
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.fi
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.SH OUTPUT PARAMETERS
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.TP 1i
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flag
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True if calling thread is main thread (boolean).
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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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MPI_Is_thread_main is called by a thread to find out whether the
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caller is the main thread (that is, the thread that called MPI_Init or
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MPI_Init_thread).
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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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.SH SEE ALSO
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.ft R
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.nf
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MPI_Init
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MPI_Init_thread
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