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MPI_Win_unlock_all - Completes an RMA access epoch started by
a call to MPI_Win_lock_all.
#include <mpi.h>
int MPI_Win_unlock_all(MPI_Win win)
INCLUDE ’mpif.h’
MPI_WIN_UNLOCK_ALL(IN, IERROR)
INTEGER IN, IERROR
- win
- Window object (handle).
- IERROR
- Fortran
only: Error status (integer).
MPI_Win_unlock_all completes an
RMA access epoch started by a call to MPI_Win_lock_all. 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.
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_all
MPI_Win_unlock
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