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macx64/mpi/mpich/share/man/man3/MPIX_Async_start.3

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+.TH MPIX_Async_start 3 "2/3/2025" " " "MPI"
+.SH NAME
+MPIX_Async_start \-  [short description] 
+.SH SYNOPSIS
+.nf
+.fi
+.nf
+int MPIX_Async_start(MPIX_Async_poll_function *poll_fn, void *extra_state,
+MPIX_Stream stream)
+.fi
+
+
+.SH INPUT PARAMETERS
+.PD 0
+.TP
+.B poll_fn 
+- user defined poll function for progressing async things (function)
+.PD 1
+.PD 0
+.TP
+.B extra_state 
+- extra state for callback function (None)
+.PD 1
+.PD 0
+.TP
+.B stream 
+- stream object (handle)
+.PD 1
+
+.SH THREAD AND INTERRUPT SAFETY
+
+This routine is thread-safe.  This means that this routine may be
+safely used by multiple threads without the need for any user-provided
+thread locks.  However, the routine is not interrupt safe.  Typically,
+this is due to the use of memory allocation routines such as 
+.I malloc
+or other non-MPICH runtime routines that are themselves not interrupt-safe.
+
+.SH NOTES FOR FORTRAN
+All MPI routines in Fortran (except for 
+.I MPI_WTIME
+and 
+.I MPI_WTICK
+) have
+an additional argument 
+.I ierr
+at the end of the argument list.  
+.I ierr
+is an integer and has the same meaning as the return value of the routine
+in C.  In Fortran, MPI routines are subroutines, and are invoked with the
+.I call
+statement.
+
+All MPI objects (e.g., 
+.I MPI_Datatype
+, 
+.I MPI_Comm
+) are of type 
+.I INTEGER
+in Fortran.
+
+.SH ERRORS
+
+All MPI routines (except 
+.I MPI_Wtime
+and 
+.I MPI_Wtick
+) return an error value;
+C routines as the value of the function and Fortran routines in the last
+argument.  Before the value is returned, the current MPI error handler is
+called.  By default, this error handler aborts the MPI job.  The error handler
+may be changed with 
+.I MPI_Comm_set_errhandler
+(for communicators),
+.I MPI_File_set_errhandler
+(for files), and 
+.I MPI_Win_set_errhandler
+(for
+RMA windows).  The MPI-1 routine 
+.I MPI_Errhandler_set
+may be used but
+its use is deprecated.  The predefined error handler
+.I MPI_ERRORS_RETURN
+may be used to cause error values to be returned.
+Note that MPI does 
+.B not
+guarantee that an MPI program can continue past
+an error; however, MPI implementations will attempt to continue whenever
+possible.
+
+.PD 0
+.TP
+.B MPI_SUCCESS 
+- No error; MPI routine completed successfully.
+.PD 1
+.PD 0
+.TP
+.B MPI_ERR_ARG 
+- Invalid argument.  Some argument is invalid and is not
+identified by a specific error class (e.g., 
+.I MPI_ERR_RANK
+).
+.PD 1
+.PD 0
+.TP
+.B MPI_ERR_OTHER 
+- Other error; use 
+.I MPI_Error_string
+to get more information
+about this error code. 
+.PD 1
+