/* -*- 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_Wait */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Wait = PMPI_Wait

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Wait  MPI_Wait

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Wait as PMPI_Wait

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Wait(MPI_Request * request, MPI_Status * status) __attribute__ ((weak, alias("PMPI_Wait")));

#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_Wait

#define MPI_Wait PMPI_Wait

#undef FUNCNAME

#define FUNCNAME MPIR_Wait_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Wait_impl(MPIR_Request * request_ptr, MPI_Status * status)

{

    int mpi_errno = MPI_SUCCESS;

    MPID_Progress_state progress_state;

    if (request_ptr == NULL)

        goto fn_exit;

    MPID_Progress_start(&progress_state);

    while (!MPIR_Request_is_complete(request_ptr)) {

        mpi_errno = MPID_Progress_wait(&progress_state);

        if (mpi_errno) {

            /* --BEGIN ERROR HANDLING-- */

            MPID_Progress_end(&progress_state);

            MPIR_ERR_POP(mpi_errno);

            /* --END ERROR HANDLING-- */

        }

        if (unlikely(MPIR_Request_is_anysrc_mismatched(request_ptr))) {

            mpi_errno = MPIR_Request_handle_proc_failed(request_ptr);

            goto fn_fail;

        }

    }

    MPID_Progress_end(&progress_state);

  fn_exit:

    return mpi_errno;

  fn_fail:

    goto fn_exit;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Wait

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Wait(MPI_Request * request, MPI_Status * status)

{

    int mpi_errno = MPI_SUCCESS;

    int active_flag;

    MPIR_Request *request_ptr = NULL;

    /* If this is a null request handle, then return an empty status */

    if (*request == MPI_REQUEST_NULL) {

        MPIR_Status_set_empty(status);

        goto fn_exit;

    }

    MPIR_Request_get_ptr(*request, request_ptr);

    MPIR_Assert(request_ptr != NULL);

    if (!MPIR_Request_is_complete(request_ptr)) {

        /* If this is an anysource request including a communicator with

         * anysource disabled, convert the call to an MPI_Test instead so we

         * don't get stuck in the progress engine. */

        if (unlikely(MPIR_Request_is_anysrc_mismatched(request_ptr))) {

            mpi_errno = MPIR_Test(request, &active_flag, status);

            goto fn_exit;

        }

        if (MPIR_Request_has_poll_fn(request_ptr)) {

            while (!MPIR_Request_is_complete(request_ptr)) {

                mpi_errno = MPIR_Grequest_poll(request_ptr, status);

                if (mpi_errno)

                    MPIR_ERR_POP(mpi_errno);

                /* Avoid blocking other threads since I am inside an infinite loop */

                MPID_THREAD_CS_YIELD(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

            }

        } else {

            mpi_errno = MPID_Wait(request_ptr, status);

            if (mpi_errno)

                MPIR_ERR_POP(mpi_errno);

        }

    }

    mpi_errno = MPIR_Request_completion_processing(request_ptr, status, &active_flag);

    if (!MPIR_Request_is_persistent(request_ptr)) {

        MPIR_Request_free(request_ptr);

        *request = MPI_REQUEST_NULL;

    }

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

  fn_exit:

    return mpi_errno;

  fn_fail:

    goto fn_exit;

}

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Wait

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

    MPI_Wait - Waits for an MPI request to complete

Input Parameters:

. request - request (handle)

Output Parameters:

. status - status object (Status).  May be 'MPI_STATUS_IGNORE'.

.N waitstatus

.N ThreadSafe

.N Fortran

.N FortranStatus

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_REQUEST

.N MPI_ERR_ARG

@*/

int MPI_Wait(MPI_Request * request, MPI_Status * status)

{

    MPIR_Request *request_ptr = NULL;

    int mpi_errno = MPI_SUCCESS;

    MPIR_Comm *comm_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WAIT);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(VNI_GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_REQUEST_ENTER(MPID_STATE_MPI_WAIT);

    /* Check the arguments */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_ARGNULL(request, "request", mpi_errno);

            /* NOTE: MPI_STATUS_IGNORE != NULL */

            MPIR_ERRTEST_ARGNULL(status, "status", mpi_errno);

            MPIR_ERRTEST_REQUEST_OR_NULL(*request, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* If this is a null request handle, then return an empty status */

    if (*request == MPI_REQUEST_NULL) {

        MPIR_Status_set_empty(status);

        goto fn_exit;

    }

    /* 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;

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    /* save copy of comm because request will be freed */

    if (request_ptr)

        comm_ptr = request_ptr->comm;

    mpi_errno = MPIR_Wait(request, status);

    if (mpi_errno)

        goto fn_fail;

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

  fn_exit:

    MPIR_FUNC_TERSE_REQUEST_EXIT(MPID_STATE_MPI_WAIT);

    MPID_THREAD_CS_EXIT(VNI_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_wait", "**mpi_wait %p %p", request, status);

#endif

    mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}