/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

/* -- Begin Profiling Symbol Block for routine MPI_Win_detach */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Win_detach = PMPI_Win_detach

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Win_detach  MPI_Win_detach

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Win_detach as PMPI_Win_detach

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Win_detach(MPI_Win win, const void *base) __attribute__ ((weak, alias("PMPI_Win_detach")));

#endif

/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build

   the MPI routines */

#ifndef MPICH_MPI_FROM_PMPI

#undef MPI_Win_detach

#define MPI_Win_detach PMPI_Win_detach

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Win_detach

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_Win_detach - Detach memory from a dynamic window

Detaches a previously attached memory region beginning at base. The arguments

base and win must match the arguments passed to a previous call to

'MPI_Win_attach'.

Input Parameters:

+ base - initial address of memory to be detached

- win - window object used for communication (handle)

Notes:

Memory also becomes detached when the associated dynamic memory window is freed.

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_ARG

.N MPI_ERR_COUNT

.N MPI_ERR_RANK

.N MPI_ERR_TYPE

.N MPI_ERR_WIN

.seealso: MPI_Win_create_dynamic MPI_Win_attach

@*/

int MPI_Win_detach(MPI_Win win, const void *base)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Win *win_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_DETACH);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_RMA_ENTER(MPID_STATE_MPI_WIN_DETACH);

    /* Validate parameters, especially handles needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_WIN(win, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    MPIR_Win_get_ptr(win, win_ptr);

    /* Validate parameters and objects (post conversion) */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            /* Validate win_ptr */

            MPIR_Win_valid_ptr(win_ptr, mpi_errno);

            if (mpi_errno)

                goto fn_fail;

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    if (base == NULL)

        goto fn_exit;

    mpi_errno = MPID_Win_detach(win_ptr, base);

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

    /* ... end of body of routine ... */

  fn_exit:

    MPIR_FUNC_TERSE_RMA_EXIT(MPID_STATE_MPI_WIN_DETACH);

    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    return mpi_errno;

  fn_fail:

    /* --BEGIN ERROR HANDLING-- */

#ifdef HAVE_ERROR_CHECKING

    {

        mpi_errno =

            MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,

                                 "**mpi_win_detach", "**mpi_win_detach %W %p", win, base);

    }

#endif

    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}