/* -*- 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"

#if !defined(MPIR_REQUEST_PTR_ARRAY_SIZE)

#define MPIR_REQUEST_PTR_ARRAY_SIZE 16

#endif

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Startall = PMPI_Startall

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Startall  MPI_Startall

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Startall as PMPI_Startall

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Startall(int count, MPI_Request array_of_requests[])

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

#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_Startall

#define MPI_Startall PMPI_Startall

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Startall

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

  MPI_Startall - Starts a collection of persistent requests

Input Parameters:

+ count - list length (integer)

- array_of_requests - array of requests (array of handle)

   Notes:

   Unlike 'MPI_Waitall', 'MPI_Startall' does not provide a mechanism for

   returning multiple errors nor pinpointing the request(s) involved.

   Furthermore, the behavior of 'MPI_Startall' after an error occurs is not

   defined by the MPI standard.  If well-defined error reporting and behavior

   are required, multiple calls to 'MPI_Start' should be used instead.

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_ARG

.N MPI_ERR_REQUEST

@*/

int MPI_Startall(int count, MPI_Request array_of_requests[])

{

    MPIR_Request *request_ptr_array[MPIR_REQUEST_PTR_ARRAY_SIZE];

    MPIR_Request **request_ptrs = request_ptr_array;

    int i;

    int mpi_errno = MPI_SUCCESS;

    MPIR_CHKLMEM_DECL(1);

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_STARTALL);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_REQUEST_ENTER(MPID_STATE_MPI_STARTALL);

    /* Validate handle parameters needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_COUNT(count, mpi_errno);

            MPIR_ERRTEST_ARGNULL(array_of_requests, "array_of_requests", mpi_errno);

            for (i = 0; i < count; i++) {

                MPIR_ERRTEST_REQUEST(array_of_requests[i], mpi_errno);

            }

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI request handles to a request object pointers */

    if (count > MPIR_REQUEST_PTR_ARRAY_SIZE) {

        MPIR_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPIR_Request **, count * sizeof(MPIR_Request *),

                                   mpi_errno, "request pointers", MPL_MEM_OBJECT);

    }

    for (i = 0; i < count; i++) {

        MPIR_Request_get_ptr(array_of_requests[i], request_ptrs[i]);

    }

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            for (i = 0; i < count; i++) {

                MPIR_Request_valid_ptr(request_ptrs[i], mpi_errno);

                if (mpi_errno)

                    goto fn_fail;

            }

            for (i = 0; i < count; i++) {

                MPIR_ERRTEST_PERSISTENT(request_ptrs[i], mpi_errno);

                MPIR_ERRTEST_PERSISTENT_ACTIVE(request_ptrs[i], mpi_errno);

            }

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPID_Startall(count, request_ptrs);

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

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

  fn_exit:

    if (count > MPIR_REQUEST_PTR_ARRAY_SIZE) {

        MPIR_CHKLMEM_FREEALL();

    }

    MPIR_FUNC_TERSE_REQUEST_EXIT(MPID_STATE_MPI_STARTALL);

    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_startall", "**mpi_startall %d %p", count,

                                 array_of_requests);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}