NAME
MPI_Request_get_status - Access information associated with a request
without freeing the request.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Request_get_status(MPI_Request request, int *flag, MPI_Status *status)
Fortran Syntax
INCLUDE ’mpif.h’
MPI_REQUEST_FREE(REQUEST, FLAG, STATUS, IERROR)
INTEGER REQUEST, STATUS(MPI_STATUS_SIZE), IERROR
LOGICAL FLAG
C++ Syntax
#include <mpi.h>
bool MPI::Request::Get_status(MPI::Status& status) const
bool MPI::Request::Get_status() const
INPUT PARAMETER
request Communication request (handle).
OUTPUT PARAMETERS
flag Boolean flag, same as from MPI_Test (logical).
status MPI_Status object if flag is true (status).
DESCRIPTION
MPI_Request_get_status sets flag=true if the operation is complete or
sets flag=false if it is not complete. If the operation is complete, it
returns in status the request status. It does not deallocate or
inactivate the request; a subsequent call to test, wait, or free should
be executed with that request.
If your application does not need to examine the status field, you can
save resources by using the predefined constant MPI_STATUS_IGNORE as a
special value for the status argument.
ERRORS
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.
Before the error value is returned, the current MPI error handler is
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.