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MPI_Win_unlock - Completes an RMA access epoch started by a call
to MPI_Win_lock.
#include <mpi.h>
int MPI_Win_unlock(int rank, MPI_Win win)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_WIN_UNLOCK(RANK, WIN, IERROR)
INTEGER RANK, WIN, IERROR
USE mpi_f08
MPI_Win_unlock(rank, win, ierror)
INTEGER, INTENT(IN) :: rank
TYPE(MPI_Win), INTENT(IN) :: win
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
- rank
- Rank of window (nonnegative integer).
- win
- Window object
(handle).
- IERROR
- Fortran only: Error status (integer).
MPI_Win_unlock completes an RMA access epoch started by a call
to MPI_Win_lock. RMA operations issued during this period will have completed
both at the origin and at the target when the call returns.
Locks are used
to protect accesses to the locked target window effected by RMA calls issued
between the lock and unlock call, and to protect local load/store accesses
to a locked local window executed between the lock and unlock call. Accesses
that are protected by an exclusive lock will not be concurrent at the window
site with other accesses to the same window that are lock protected. Accesses
that are protected by a shared lock will not be concurrent at the window
site with accesses protected by an exclusive lock to the same window.
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.
MPI_Win_lock MPI_Win_unlock_all
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