103 lines
3.0 KiB
Groff
103 lines
3.0 KiB
Groff
.\" Man page generated from reStructuredText.
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.TH "MPI_REQUEST_C2F" "3" "Feb 14, 2025" "" "Open MPI"
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..
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.INDENT 0.0
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.INDENT 3.5
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.UNINDENT
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.UNINDENT
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.sp
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\fI\%MPI_Comm_f2c\fP, \fI\%MPI_Comm_c2f\fP, \fI\%MPI_File_f2c\fP, \fI\%MPI_File_c2f\fP, \fI\%MPI_Info_f2c\fP,
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\fI\%MPI_Info_c2f\fP, \fI\%MPI_Message_f2c\fP, \fI\%MPI_Message_c2f\fP, \fI\%MPI_Op_f2c\fP, \fI\%MPI_Op_c2f\fP,
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\fI\%MPI_Request_f2c\fP, \fI\%MPI_Request_c2f\fP, \fI\%MPI_Type_f2c\fP, \fI\%MPI_Type_c2f\fP,
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\fI\%MPI_Win_f2c\fP, \fI\%MPI_Win_c2f\fP \- Translates a C handle into a Fortran
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handle, or vice versa.
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.SH SYNTAX
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.SS C Syntax
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.INDENT 0.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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#include <mpi.h>
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MPI_Comm MPI_Comm_f2c(MPI_Fint comm)
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MPI_Fint MPI_Comm_c2f(MPI_Comm comm)
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MPI_File MPI_File_f2c(MPI_Fint file)
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MPI_Fint MPI_File_c2f(MPI_File file)
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MPI_Group MPI_Group_f2c(MPI Fint group)
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MPI_Fint MPI_Group_c2f(MPI Group group)
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MPI_Info MPI_Info_f2c(MPI_Fint info)
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MPI_Fint MPI_Info_c2f(MPI_Info info)
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MPI_Message MPI_Message_f2c(MPI_Fint message)
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MPI_Fint MPI_Message_c2f(MPI_Message message)
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MPI_Op MPI_Op_f2c(MPI_Fint op)
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MPI_Fint MPI_Op_c2f(MPI_Op op)
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MPI_Request MPI_Request_f2c(MPI_Fint request)
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MPI_Fint MPI_Request_c2f(MPI_Request request)
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MPI_Datatype MPI_Type_f2c(MPI_Fint datatype)
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MPI_Fint MPI_Type_c2f(MPI_Datatype datatype)
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MPI_Win MPI_Win_f2c(MPI_Fint win)
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MPI_Fint MPI_Win_c2f(MPI_Win win)
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.SH DESCRIPTION
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.sp
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Handles are passed between Fortran and C by using an explicit C wrapper
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to convert Fortran handles to C handles. There is no direct access to C
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handles in Fortran. The type definition MPI_Fint is provided in C for
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an integer of the size that matches a Fortran \fIINTEGER\fP; usually,
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MPI_Fint will be equivalent to \fIint\fP\&. The handle translation functions
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are provided in C to convert from a Fortran handle (which is an integer)
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to a C handle, and vice versa.
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.sp
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For example, if \fIcomm\fP is a valid Fortran handle to a communicator, then
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\fI\%MPI_Comm_f2c\fP returns a valid C handle to that same communicator; if
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\fIcomm\fP = MPI_COMM_NULL (Fortran value), then \fI\%MPI_Comm_f2c\fP returns a null
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C handle; if \fIcomm\fP is an invalid Fortran handle, then \fI\%MPI_Comm_f2c\fP
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returns an invalid C handle.
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.SH NOTE
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.sp
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This function does not return an error value. Consequently, the result
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of calling it before \fI\%MPI_Init\fP or after \fI\%MPI_Finalize\fP is undefined.
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.SH COPYRIGHT
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2003-2025, The Open MPI Community
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.\" Generated by docutils manpage writer.
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.
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