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MPI_Request_get_status - Access information associated with a request
without freeing the request.
#include <mpi.h>
int MPI_Request_get_status(MPI_Request request, int *flag, MPI_Status *status)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_REQUEST_GET_STATUS(REQUEST, FLAG, STATUS, IERROR)
INTEGER REQUEST, STATUS(MPI_STATUS_SIZE), IERROR
LOGICAL FLAG
USE mpi_f08
MPI_Request_get_status(request, flag, status, ierror)
TYPE(MPI_Request), INTENT(IN) :: request
LOGICAL, INTENT(OUT) :: flag
TYPE(MPI_Status) :: status
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
- request
- Communication request (handle).
- flag
- Boolean flag, same as from MPI_Test (logical).
- status
- MPI_Status object if flag is true (status).
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.
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.
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