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

/*

 *

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 *

 * Portions of this code were written by Microsoft. Those portions are

 * Copyright (c) 2007 Microsoft Corporation. Microsoft grants

 * permission to use, reproduce, prepare derivative works, and to

 * redistribute to others. The code is licensed "as is." The User

 * bears the risk of using it. Microsoft gives no express warranties,

 * guarantees or conditions. To the extent permitted by law, Microsoft

 * excludes the implied warranties of merchantability, fitness for a

 * particular purpose and non-infringement.

 */

#include "mpiimpl.h"

#include "attr.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Comm_create_keyval = PMPI_Comm_create_keyval

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Comm_create_keyval  MPI_Comm_create_keyval

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Comm_create_keyval as PMPI_Comm_create_keyval

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Comm_create_keyval(MPI_Comm_copy_attr_function *comm_copy_attr_fn,

                           MPI_Comm_delete_attr_function *comm_delete_attr_fn, int *comm_keyval,

                           void *extra_state) __attribute__((weak,alias("PMPI_Comm_create_keyval")));

#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_create_keyval

#define MPI_Comm_create_keyval PMPI_Comm_create_keyval

#undef FUNCNAME

#define FUNCNAME MPIR_Comm_create_keyval_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Comm_create_keyval_impl(MPI_Comm_copy_attr_function *comm_copy_attr_fn,

                                 MPI_Comm_delete_attr_function *comm_delete_attr_fn,

                                 int *comm_keyval, void *extra_state)

{

    int mpi_errno = MPI_SUCCESS;

    MPID_Keyval *keyval_ptr;

    keyval_ptr = (MPID_Keyval *)MPIU_Handle_obj_alloc( &MPID_Keyval_mem );

    MPIR_ERR_CHKANDJUMP(!keyval_ptr, mpi_errno, MPI_ERR_OTHER,"**nomem");

    /* Initialize the attribute dup function */

    if (!MPIR_Process.attr_dup) {

	MPIR_Process.attr_dup  = MPIR_Attr_dup_list;

	MPIR_Process.attr_free = MPIR_Attr_delete_list;

    }

    /* The handle encodes the keyval kind.  Modify it to have the correct

       field */

    keyval_ptr->handle           = (keyval_ptr->handle & ~(0x03c00000)) |

	                           (MPID_COMM << 22);

    MPIU_Object_set_ref(keyval_ptr,1);

    keyval_ptr->was_freed        = 0;

    keyval_ptr->kind	         = MPID_COMM;

    keyval_ptr->extra_state      = extra_state;

    keyval_ptr->copyfn.user_function = comm_copy_attr_fn;

    keyval_ptr->copyfn.proxy = MPIR_Attr_copy_c_proxy;

    keyval_ptr->delfn.user_function = comm_delete_attr_fn;

    keyval_ptr->delfn.proxy = MPIR_Attr_delete_c_proxy;

    MPID_OBJ_PUBLISH_HANDLE(*comm_keyval, keyval_ptr->handle);

 fn_exit:

    return mpi_errno;

 fn_fail:

    goto fn_exit;

}

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Comm_create_keyval

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

   MPI_Comm_create_keyval - Create a new attribute key 

Input Parameters:

+ comm_copy_attr_fn - Copy callback function for 'keyval'

. comm_delete_attr_fn - Delete callback function for 'keyval'

- extra_state - Extra state for callback functions 

Output Parameters:

. comm_keyval - key value for future access (integer) 

Notes:

Key values are global (available for any and all communicators).

Default copy and delete functions are available.  These are

+ MPI_COMM_NULL_COPY_FN   - empty copy function

. MPI_COMM_NULL_DELETE_FN - empty delete function

- MPI_COMM_DUP_FN         - simple dup function

There are subtle differences between C and Fortran that require that the

copy_fn be written in the same language from which 'MPI_Comm_create_keyval'

is called.

This should not be a problem for most users; only programmers using both

Fortran and C in the same program need to be sure that they follow this rule.

.N AttrErrReturn

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.seealso MPI_Comm_free_keyval

@*/

int MPI_Comm_create_keyval(MPI_Comm_copy_attr_function *comm_copy_attr_fn, 

			   MPI_Comm_delete_attr_function *comm_delete_attr_fn, 

			   int *comm_keyval, void *extra_state)

{

    int mpi_errno = MPI_SUCCESS;

    MPID_MPI_STATE_DECL(MPID_STATE_MPI_COMM_CREATE_KEYVAL);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_COMM_CREATE_KEYVAL);

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

#   ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

	    MPIR_ERRTEST_ARGNULL(comm_keyval, "comm_keyval", mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#   endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPIR_Comm_create_keyval_impl(comm_copy_attr_fn, comm_delete_attr_fn, comm_keyval, extra_state);

    if (mpi_errno) goto fn_fail;

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

  fn_exit:

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_COMM_CREATE_KEYVAL);

    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_comm_create_keyval",

	    "**mpi_comm_create_keyval %p %p %p %p", comm_copy_attr_fn, comm_delete_attr_fn, comm_keyval, extra_state);

    }

#   endif

    mpi_errno = MPIR_Err_return_comm( NULL, FCNAME, mpi_errno );

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}