MPI_Grequest_complete - Reports that a generalized request is complete.
188.8.131.52.1. C Syntax
#include <mpi.h> int MPI_Grequest_complete(MPI_Request request)
184.108.40.206.2. Fortran Syntax
USE MPI ! or the older form: INCLUDE 'mpif.h' MPI_GREQUEST_COMPLETE(REQUEST, IERROR) INTEGER REQUEST, IERROR
220.127.116.11.3. Fortran 2008 Syntax
USE mpi_f08 MPI_Grequest_complete(request, ierror) TYPE(MPI_Request), INTENT(IN) :: request INTEGER, OPTIONAL, INTENT(OUT) :: ierror
18.104.22.168. Input/Output Parameter
request: Generalized request (handle).
22.214.171.124. Output Parameter
IERROR: Fortran only: Error status (integer).
MPI_Grequest_complete informs MPI that the operations represented by
the generalized request
request are complete. A call to
MPI_Wait(request, status)`` will return, and a call to
MPI_Test(request, flag, status)`` will return flag=true only after a
call to MPI_Grequest_complete has declared that these operations are
MPI imposes no restrictions on the code executed by the callback
functions. However, new nonblocking operations should be defined so that
the general semantic rules about MPI calls such as MPI_Test,
MPI_Request_free, or MPI_Cancel still hold. For example, all
these calls are supposed to be local and nonblocking. Therefore, the
invoke blocking MPI communication calls only if the context is such that
these calls are guaranteed to return in finite time. Once MPI_Cancel
has been invoked, the canceled operation should complete in finite time,
regardless of the state of other processes (the operation has acquired
“local” semantics). It should either succeed or fail without
side-effects. The user should guarantee these same properties for newly
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument.
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.