/* -*- 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_Start */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Start = PMPI_Start

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Start  MPI_Start

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Start as PMPI_Start

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Start(MPI_Request * request) __attribute__ ((weak, alias("PMPI_Start")));

#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_Start

#define MPI_Start PMPI_Start

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Start

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

    MPI_Start - Initiates a communication with a persistent request handle

Input Parameters:

. request - communication request (handle)

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_REQUEST

@*/

int MPI_Start(MPI_Request * request)

{

    MPIR_Request *request_ptr = NULL;

    int mpi_errno = MPI_SUCCESS;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_START);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_REQUEST_ENTER(MPID_STATE_MPI_START);

    /* Validate handle parameters needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_ARGNULL(request, "request", mpi_errno);

            MPIR_ERRTEST_REQUEST(*request, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI request handle to a request object pointer */

    MPIR_Request_get_ptr(*request, request_ptr);

    /* Validate object pointers if error checking is enabled */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_Request_valid_ptr(request_ptr, mpi_errno);

            if (mpi_errno)

                goto fn_fail;

            MPIR_ERRTEST_PERSISTENT(request_ptr, mpi_errno);

            MPIR_ERRTEST_PERSISTENT_ACTIVE(request_ptr, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPID_Startall(1, &request_ptr);

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

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

  fn_exit:

    MPIR_FUNC_TERSE_REQUEST_EXIT(MPID_STATE_MPI_START);

    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_start", "**mpi_start %p", request);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}