mpi_win_free(3openmpi) [osx man page]
MPI_Win_free(3OpenMPI) MPI_Win_free(3OpenMPI) NAME
MPI_Win_free - Frees the window object and returns a null handle. SYNTAX
C Syntax #include <mpi.h> int MPI_Win_free(MPI_Win *win) Fortran Syntax INCLUDE 'mpif.h' MPI_WIN_FREE(WIN, IERROR) INTEGER WIN, IERROR C++ Syntax #include <mpi.h> void MPI::Win::Free() INPUT
/OUTPUT PARAMETER win Window object (handle). OUTPUT PARAMETER
IERROR Fortran only: Error status (integer). DESCRIPTION
MPI_Win_free frees the window object win and returns a null handle (equal to MPI_WIN_NULL). This collective call is executed by all pro- cesses in the group associated with win. It can be invoked by a process only after it has completed its involvement in RMA communications on window win, that is, the process has called MPI_Win_fence, or called MPI_Win_unlock to match a previous call to MPI_Win_lock. When the call returns, the window memory can be freed. 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++ func- tions 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. SEE ALSO
MPI_Win_create MPI_Win_fence MPI_Win_unlock Open MPI 1.2 March 2006 MPI_Win_free(3OpenMPI)
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MPI_Win_unlock(3OpenMPI) MPI_Win_unlock(3OpenMPI) NAME
MPI_Win_unlock - Completes an RMA access epoch started by a call to MPI_Win_lock. SYNTAX
C Syntax #include <mpi.h> int MPI_Win_unlock(int rank, MPI_Win win) Fortran Syntax INCLUDE 'mpif.h' MPI_WIN_UNLOCK(RANK, WIN, IERROR) INTEGER RANK, WIN, IERROR C++ Syntax #include <mpi.h> void MPI::Win::Unlock(int rank) const INPUT PARAMETERS
rank Rank of window (nonnegative integer). win Window object (handle). OUTPUT PARAMETER
IERROR Fortran only: Error status (integer). DESCRIPTION
MPI_Win_unlock completes an RMA access epoch started by a call to MPI_Win_lock. RMA operations issued during this period will have com- pleted 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 pro- tect local load/store accesses to a locked local window executed between the lock and unlock call. Accesses that are protected by an exclu- sive lock will not be concurrent at the window site with other accesses to the same window that are lock protected. Accesses that are pro- tected by a shared lock will not be concurrent at the window site with accesses protected by an exclusive lock to the same window. 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++ func- tions 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. SEE ALSO
MPI_Win_lock Open MPI 1.2 March 2007 MPI_Win_unlock(3OpenMPI)