/* -*- 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"

#include "attr.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Type_delete_attr = PMPI_Type_delete_attr

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Type_delete_attr  MPI_Type_delete_attr

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Type_delete_attr as PMPI_Type_delete_attr

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Type_delete_attr(MPI_Datatype datatype, int type_keyval)

    __attribute__ ((weak, alias("PMPI_Type_delete_attr")));

#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_Type_delete_attr

#define MPI_Type_delete_attr PMPI_Type_delete_attr

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Type_delete_attr

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

   MPI_Type_delete_attr - Deletes an attribute value associated with a key on

   a datatype

Input Parameters:

+  datatype - MPI datatype to which attribute is attached (handle)

-  type_keyval - The key value of the deleted attribute (integer)

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_OTHER

.N MPI_ERR_KEYVAL

@*/

int MPI_Type_delete_attr(MPI_Datatype datatype, int type_keyval)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Datatype *type_ptr = NULL;

    MPIR_Attribute *p, **old_p;

    MPII_Keyval *keyval_ptr = 0;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_TYPE_DELETE_ATTR);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    /* The thread lock prevents a valid attr delete on the same datatype

     * but in a different thread from causing problems */

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_TYPE_DELETE_ATTR);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_DATATYPE(datatype, "datatype", mpi_errno);

            MPIR_ERRTEST_KEYVAL(type_keyval, MPIR_DATATYPE, "datatype", mpi_errno);

            MPIR_ERRTEST_KEYVAL_PERM(type_keyval, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif

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

    MPIR_Datatype_get_ptr(datatype, type_ptr);

    MPII_Keyval_get_ptr(type_keyval, keyval_ptr);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            /* Validate type_ptr */

            MPIR_Datatype_valid_ptr(type_ptr, mpi_errno);

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

            /* Validate keyval_ptr */

            if (mpi_errno)

                goto fn_fail;

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    /* Look for attribute.  They are ordered by keyval handle */

    old_p = &type_ptr->attributes;

    p = type_ptr->attributes;

    while (p) {

        if (p->keyval->handle == keyval_ptr->handle) {

            break;

        }

        old_p = &p->next;

        p = p->next;

    }

    /* We can't unlock yet, because we must not free the attribute until

     * we know whether the delete function has returned with a 0 status

     * code */

    if (p) {

        /* Run the delete function, if any, and then free the attribute

         * storage */

        mpi_errno = MPIR_Call_attr_delete(datatype, p);

        /* --BEGIN ERROR HANDLING-- */

        if (!mpi_errno) {

            int in_use;

            /* We found the attribute.  Remove it from the list */

            *old_p = p->next;

            /* Decrement the use of the keyval */

            MPII_Keyval_release_ref(p->keyval, &in_use);

            if (!in_use) {

                MPIR_Handle_obj_free(&MPII_Keyval_mem, p->keyval);

            }

            MPID_Attr_free(p);

        }

        /* --END ERROR HANDLING-- */

    }

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

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

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_TYPE_DELETE_ATTR);

    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_type_delete_attr", "**mpi_type_delete_attr %D %d", datatype,

                                 type_keyval);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}