/* -*- 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_Comm_connect */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Comm_connect = PMPI_Comm_connect
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Comm_connect  MPI_Comm_connect
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Comm_connect as PMPI_Comm_connect
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Comm_connect(const char *port_name, MPI_Info info, int root, MPI_Comm comm,
                     MPI_Comm *newcomm) __attribute__((weak,alias("PMPI_Comm_connect")));
#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_connect
#define MPI_Comm_connect PMPI_Comm_connect

#undef FUNCNAME
#define FUNCNAME MPIR_Comm_connect_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Comm_connect_impl(const char * port_name, MPID_Info * info_ptr, int root,
                          MPID_Comm * comm_ptr, MPID_Comm ** newcomm_ptr)
{
    return MPID_Comm_connect(port_name, info_ptr, root, comm_ptr, newcomm_ptr);
}

#endif

#undef FUNCNAME
#define FUNCNAME MPI_Comm_connect
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
   MPI_Comm_connect - Make a request to form a new intercommunicator

Input Parameters:
+ port_name - network address (string, used only on root) 
. info - implementation-dependent information (handle, used only on root) 
. root - rank in comm of root node (integer) 
- comm - intracommunicator over which call is collective (handle) 

Output Parameters:
. newcomm - intercommunicator with server as remote group (handle) 

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_INFO
.N MPI_ERR_PORT
@*/
int MPI_Comm_connect(const char *port_name, MPI_Info info, int root, MPI_Comm comm,
                     MPI_Comm *newcomm)
{
    int mpi_errno = MPI_SUCCESS;
    MPID_Comm *comm_ptr = NULL;
    MPID_Comm *newcomm_ptr = NULL;
    MPID_Info *info_ptr = NULL;
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_COMM_CONNECT);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_COMM_CONNECT);
    
    /* Validate parameters, especially handles needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_ERRTEST_COMM(comm, mpi_errno);
	    MPIR_ERRTEST_INFO_OR_NULL(info, mpi_errno);
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif
    
    /* Convert MPI object handles to object pointers */
    MPID_Comm_get_ptr( comm, comm_ptr );
    MPID_Info_get_ptr( info, info_ptr );

    /* Validate parameters and objects (post conversion) */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
            /* Validate comm_ptr */
            MPID_Comm_valid_ptr( comm_ptr, mpi_errno, FALSE );
	    /* If comm_ptr is not valid, it will be reset to null */
            if (mpi_errno) goto fn_fail;
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */
    
    mpi_errno = MPIR_Comm_connect_impl(port_name, info_ptr, root, comm_ptr, &newcomm_ptr);
    if (mpi_errno) goto fn_fail;

    MPID_OBJ_PUBLISH_HANDLE(*newcomm, newcomm_ptr->handle);

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

  fn_exit:
    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_COMM_CONNECT);
    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_connect", 
	    "**mpi_comm_connect %s %I %d %C %p", port_name, info, root, comm, newcomm);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm( comm_ptr, FCNAME, mpi_errno );
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}