/* -*- 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_disconnect */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Comm_disconnect = PMPI_Comm_disconnect
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Comm_disconnect MPI_Comm_disconnect
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Comm_disconnect as PMPI_Comm_disconnect
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Comm_disconnect(MPI_Comm * comm) __attribute__ ((weak, alias("PMPI_Comm_disconnect")));
#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_disconnect
#define MPI_Comm_disconnect PMPI_Comm_disconnect
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Comm_disconnect
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Comm_disconnect - Disconnect from a communicator
Input Parameters:
. comm - communicator (handle)
Notes:
This routine waits for all pending communication to complete, then frees the
communicator and sets 'comm' to 'MPI_COMM_NULL'. It may not be called
with 'MPI_COMM_WORLD' or 'MPI_COMM_SELF'.
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.seealso MPI_Comm_connect, MPI_Comm_join
@*/
int MPI_Comm_disconnect(MPI_Comm * comm)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Comm *comm_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_COMM_DISCONNECT);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_COMM_DISCONNECT);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(*comm, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif
/* 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;
{
/* Validate comm_ptr */
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, TRUE);
/* 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 ... */
/*
* Since outstanding I/O bumps the reference count on the communicator,
* we wait until we hold the last reference count to
* ensure that all communication has completed. The reference count
* is 1 when the communicator is created, and it is incremented
* only for pending communication operations (and decremented when
* those complete).
*/
/* FIXME-MT should we be checking this? */
if (MPIR_Object_get_ref(comm_ptr) > 1) {
MPID_Progress_state progress_state;
MPID_Progress_start(&progress_state);
while (MPIR_Object_get_ref(comm_ptr) > 1) {
mpi_errno = MPID_Progress_wait(&progress_state);
/* --BEGIN ERROR HANDLING-- */
if (mpi_errno != MPI_SUCCESS) {
MPID_Progress_end(&progress_state);
goto fn_fail;
}
/* --END ERROR HANDLING-- */
}
MPID_Progress_end(&progress_state);
}
mpi_errno = MPID_Comm_disconnect(comm_ptr);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
*comm = MPI_COMM_NULL;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_COMM_DISCONNECT);
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_disconnect", "**mpi_comm_disconnect %C", *comm);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}