/* -*- 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_get_errhandler */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Win_get_errhandler = PMPI_Win_get_errhandler

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Win_get_errhandler  MPI_Win_get_errhandler

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Win_get_errhandler as PMPI_Win_get_errhandler

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Win_get_errhandler(MPI_Win win, MPI_Errhandler *errhandler) __attribute__((weak,alias("PMPI_Win_get_errhandler")));

#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_get_errhandler

#define MPI_Win_get_errhandler PMPI_Win_get_errhandler

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Win_get_errhandler

/*@

   MPI_Win_get_errhandler - Get the error handler for the MPI RMA window

Input Parameters:

. win - window (handle) 

Output Parameters:

. errhandler - error handler currently associated with window (handle) 

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_WIN

.N MPI_ERR_OTHER

@*/

int MPI_Win_get_errhandler(MPI_Win win, MPI_Errhandler *errhandler)

{

#ifdef HAVE_ERROR_CHECKING

    static const char FCNAME[] = "MPI_Win_get_errhandler";

#endif

    int mpi_errno = MPI_SUCCESS;

    MPID_Win *win_ptr = NULL;

    MPID_MPI_STATE_DECL(MPID_STATE_MPI_WIN_GET_ERRHANDLER);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_WIN_GET_ERRHANDLER);

    /* 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

    /* Convert MPI object handles to object pointers */

    MPID_Win_get_ptr( win, win_ptr );

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

#   ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

	    MPIR_ERRTEST_ARGNULL(errhandler,"errhandler",mpi_errno);

            /* Validate win_ptr */

            MPID_Win_valid_ptr( win_ptr, mpi_errno );

	    /* If win_ptr is not valid, it will be reset to null */

            if (mpi_errno) goto fn_fail;

        }

        MPID_END_ERROR_CHECKS;

    }

#   endif /* HAVE_ERROR_CHECKING */

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

    MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

    if (win_ptr->errhandler) {

	*errhandler = win_ptr->errhandler->handle;

	MPIR_Errhandler_add_ref(win_ptr->errhandler);

    }

    else {

	/* Use the default */

	*errhandler = MPI_ERRORS_ARE_FATAL;

    }

    MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

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

#ifdef HAVE_ERROR_CHECKING

  fn_exit:

#endif

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_WIN_GET_ERRHANDLER);

    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    return mpi_errno;

    /* --BEGIN ERROR HANDLING-- */

#   ifdef HAVE_ERROR_CHECKING

  fn_fail:

    {

	mpi_errno = MPIR_Err_create_code(

	    mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER, 

	    "**mpi_win_get_errhandler",

	    "**mpi_win_get_errhandler %W %p", win, errhandler);

    }

    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);

    goto fn_exit;

#   endif

    /* --END ERROR HANDLING-- */

}