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

/*

 *  (C) 2011 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Mprobe = PMPI_Mprobe

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Mprobe  MPI_Mprobe

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Mprobe as PMPI_Mprobe

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Mprobe(int source, int tag, MPI_Comm comm, MPI_Message * message, MPI_Status * status)

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

#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_Mprobe

#define MPI_Mprobe PMPI_Mprobe

/* any non-MPI functions go here, especially non-static ones */

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME

#define FUNCNAME MPI_Mprobe

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_Mprobe - Blocking matched probe.

Input Parameters:

+ source - rank of source or MPI_ANY_SOURCE (integer)

. tag - message tag or MPI_ANY_TAG (integer)

- comm - communicator (handle)

Output Parameters:

+ message - returned message (handle)

- status - status object (status)

.N ThreadSafe

.N Fortran

.N Errors

@*/

int MPI_Mprobe(int source, int tag, MPI_Comm comm, MPI_Message * message, MPI_Status * status)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Request *msgp = NULL;

    MPIR_Comm *comm_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_MPROBE);

    MPID_THREAD_CS_ENTER(VNI_GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_MPROBE);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_COMM(comm, mpi_errno);

            /* TODO more checks may be appropriate */

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    MPIR_Comm_get_ptr(comm, comm_ptr);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);

            /* TODO more checks may be appropriate (counts, in_place, buffer aliasing, etc) */

            if (mpi_errno != MPI_SUCCESS)

                goto fn_fail;

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    *message = MPI_MESSAGE_NULL;

    mpi_errno = MPID_Mprobe(source, tag, comm_ptr, MPIR_CONTEXT_INTRA_PT2PT, &msgp, status);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

    if (msgp == NULL) {

        MPIR_Assert(source == MPI_PROC_NULL);

        *message = MPI_MESSAGE_NO_PROC;

    } else {

        *message = msgp->handle;

    }

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

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_MPROBE);

    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_mprobe", "**mpi_mprobe %d %d %C %p %p", source, tag, comm,

                                 message, status);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}