/* -*- 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"
#include "mpicomm.h"
#include <stdint.h>
/* -- Begin Profiling Symbol Block for routine MPIX_Comm_agree */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPIX_Comm_agree = PMPIX_Comm_agree
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPIX_Comm_agree MPIX_Comm_agree
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPIX_Comm_agree as PMPIX_Comm_agree
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPIX_Comm_agree(MPI_Comm comm, int *flag) __attribute__ ((weak, alias("PMPIX_Comm_agree")));
#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 MPIX_Comm_agree
#define MPIX_Comm_agree PMPIX_Comm_agree
#undef FUNCNAME
#define FUNCNAME MPIR_Comm_agree
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Comm_agree(MPIR_Comm * comm_ptr, int *flag)
{
int mpi_errno = MPI_SUCCESS, mpi_errno_tmp = MPI_SUCCESS;
MPIR_Group *comm_grp = NULL, *failed_grp = NULL, *new_group_ptr = NULL, *global_failed = NULL;
int result, success = 1;
MPIR_Errflag_t errflag = MPIR_ERR_NONE;
int values[2];
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPIR_COMM_AGREE);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPIR_COMM_AGREE);
MPIR_Comm_group_impl(comm_ptr, &comm_grp);
/* Get the locally known (not acknowledged) group of failed procs */
mpi_errno = MPID_Comm_failure_get_acked(comm_ptr, &failed_grp);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* First decide on the group of failed procs. */
mpi_errno = MPID_Comm_get_all_failed_procs(comm_ptr, &global_failed, MPIR_AGREE_TAG);
if (mpi_errno)
errflag = MPIR_ERR_PROC_FAILED;
mpi_errno = MPIR_Group_compare_impl(failed_grp, global_failed, &result);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* Create a subgroup without the failed procs */
mpi_errno = MPIR_Group_difference_impl(comm_grp, global_failed, &new_group_ptr);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* If that group isn't the same as what we think is failed locally, then
* mark it as such. */
if (result == MPI_UNEQUAL || errflag)
success = 0;
/* Do an allreduce to decide whether or not anyone thinks the group
* has changed */
mpi_errno_tmp = MPII_Allreduce_group(MPI_IN_PLACE, &success, 1, MPI_INT, MPI_MIN, comm_ptr,
new_group_ptr, MPIR_AGREE_TAG, &errflag);
if (!success || errflag || mpi_errno_tmp)
success = 0;
values[0] = success;
values[1] = *flag;
/* Determine both the result of this function (mpi_errno) and the result
* of flag that will be returned to the user. */
MPII_Allreduce_group(MPI_IN_PLACE, values, 2, MPI_INT, MPI_BAND, comm_ptr,
new_group_ptr, MPIR_AGREE_TAG, &errflag);
/* Ignore the result of the operation this time. Everyone will either
* return a failure because of !success earlier or they will return
* something useful for flag because of this operation. If there was a new
* failure in between the first allreduce and the second one, it's ignored
* here. */
if (failed_grp != MPIR_Group_empty)
MPIR_Group_release(failed_grp);
MPIR_Group_release(new_group_ptr);
MPIR_Group_release(comm_grp);
if (global_failed != MPIR_Group_empty)
MPIR_Group_release(global_failed);
success = values[0];
*flag = values[1];
if (!success) {
MPIR_ERR_SET(mpi_errno_tmp, MPIX_ERR_PROC_FAILED, "**mpix_comm_agree");
MPIR_ERR_ADD(mpi_errno, mpi_errno_tmp);
}
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPIR_COMM_AGREE);
return mpi_errno;
fn_fail:
goto fn_exit;
}
#endif /* !defined(MPICH_MPI_FROM_PMPI) */
#undef FUNCNAME
#define FUNCNAME MPIX_Comm_agree
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPIX_Comm_agree - Performs agreement operation on comm
Input Parameters:
. comm - communicator (handle)
Output Parameters:
. newcomm - new communicator (handle)
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
@*/
int MPIX_Comm_agree(MPI_Comm comm, int *flag)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Comm *comm_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPIX_COMM_AGREE);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPIX_COMM_AGREE);
/* Validate parameters, and convert MPI object handles to object pointers */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
}
MPID_END_ERROR_CHECKS;
MPIR_Comm_get_ptr(comm, comm_ptr);
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate comm_ptr */
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, TRUE);
if (mpi_errno)
goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
#else
{
MPIR_Comm_get_ptr(comm, comm_ptr);
}
#endif
/* ... body of routine ... */
mpi_errno = MPIR_Comm_agree(comm_ptr, flag);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPIX_COMM_AGREE);
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, "**mpix_comm_agree", "**mpix_comm_agree %C", comm);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}