/* -*- 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_Comm_set_errhandler */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Comm_set_errhandler = PMPI_Comm_set_errhandler

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Comm_set_errhandler  MPI_Comm_set_errhandler

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Comm_set_errhandler as PMPI_Comm_set_errhandler

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Comm_set_errhandler(MPI_Comm comm, MPI_Errhandler errhandler)

    __attribute__ ((weak, alias("PMPI_Comm_set_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_Comm_set_errhandler

#define MPI_Comm_set_errhandler PMPI_Comm_set_errhandler

#undef FUNCNAME

#define FUNCNAME MPIR_Comm_set_errhandler_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

void MPIR_Comm_set_errhandler_impl(MPIR_Comm * comm_ptr, MPIR_Errhandler * errhandler_ptr)

{

    int in_use;

    MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_COMM_MUTEX(comm_ptr));

    /* We don't bother with the case where the errhandler is NULL;

     * in this case, the error handler was the original, MPI_ERRORS_ARE_FATAL,

     * which is builtin and can never be freed. */

    if (comm_ptr->errhandler != NULL) {

        MPIR_Errhandler_release_ref(comm_ptr->errhandler, &in_use);

        if (!in_use) {

            MPIR_Errhandler_free(comm_ptr->errhandler);

        }

    }

    MPIR_Errhandler_add_ref(errhandler_ptr);

    comm_ptr->errhandler = errhandler_ptr;

    MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_COMM_MUTEX(comm_ptr));

    return;

}

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Comm_set_errhandler

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

   MPI_Comm_set_errhandler - Set the error handler for a communicator

Input Parameters:

+ comm - communicator (handle)

- errhandler - new error handler for communicator (handle)

.N ThreadSafeNoUpdate

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_COMM

.N MPI_ERR_OTHER

.seealso MPI_Comm_get_errhandler, MPI_Comm_call_errhandler

@*/

int MPI_Comm_set_errhandler(MPI_Comm comm, MPI_Errhandler errhandler)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Comm *comm_ptr = NULL;

    MPIR_Errhandler *errhan_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_COMM_SET_ERRHANDLER);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_COMM_SET_ERRHANDLER);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_COMM(comm, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif

    /* Convert MPI object handles to object pointers */

    MPIR_Comm_get_ptr(comm, comm_ptr);

    MPIR_Errhandler_get_ptr(errhandler, errhan_ptr);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            /* Validate comm_ptr; if comm_ptr is not valid, it will be reset to null */

            MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, TRUE);

            if (HANDLE_GET_KIND(errhandler) != HANDLE_KIND_BUILTIN) {

                MPIR_Errhandler_valid_ptr(errhan_ptr, mpi_errno);

            }

            MPIR_ERRTEST_ERRHANDLER(errhandler, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    MPIR_Comm_set_errhandler_impl(comm_ptr, errhan_ptr);

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

#ifdef HAVE_ERROR_CHECKING

  fn_exit:

#endif

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_COMM_SET_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_comm_set_errhandler", "**mpi_comm_set_errhandler %C %E",

                                 comm, errhandler);

    }

    mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);

    goto fn_exit;

#endif

    /* --END ERROR HANDLING-- */

}