/* -*- 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 "group.h"
/* -- Begin Profiling Symbol Block for routine MPI_Group_compare */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Group_compare = PMPI_Group_compare
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Group_compare MPI_Group_compare
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Group_compare as PMPI_Group_compare
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Group_compare(MPI_Group group1, MPI_Group group2, int *result)
__attribute__ ((weak, alias("PMPI_Group_compare")));
#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_Group_compare
#define MPI_Group_compare PMPI_Group_compare
int MPIR_Group_compare_impl(MPIR_Group * group_ptr1, MPIR_Group * group_ptr2, int *result)
{
int mpi_errno = MPI_SUCCESS;
int g1_idx, g2_idx, size, i;
/* See if their sizes are equal */
if (group_ptr1->size != group_ptr2->size) {
*result = MPI_UNEQUAL;
goto fn_exit;
}
/* Run through the lrank to lpid lists of each group in lpid order
* to see if the same processes are involved */
g1_idx = group_ptr1->idx_of_first_lpid;
g2_idx = group_ptr2->idx_of_first_lpid;
/* If the lpid list hasn't been created, do it now */
if (g1_idx < 0) {
MPII_Group_setup_lpid_list(group_ptr1);
g1_idx = group_ptr1->idx_of_first_lpid;
}
if (g2_idx < 0) {
MPII_Group_setup_lpid_list(group_ptr2);
g2_idx = group_ptr2->idx_of_first_lpid;
}
while (g1_idx >= 0 && g2_idx >= 0) {
if (group_ptr1->lrank_to_lpid[g1_idx].lpid != group_ptr2->lrank_to_lpid[g2_idx].lpid) {
*result = MPI_UNEQUAL;
goto fn_exit;
}
g1_idx = group_ptr1->lrank_to_lpid[g1_idx].next_lpid;
g2_idx = group_ptr2->lrank_to_lpid[g2_idx].next_lpid;
}
/* See if the processes are in the same order by rank */
size = group_ptr1->size;
for (i = 0; i < size; i++) {
if (group_ptr1->lrank_to_lpid[i].lpid != group_ptr2->lrank_to_lpid[i].lpid) {
*result = MPI_SIMILAR;
goto fn_exit;
}
}
/* If we reach here, the groups are identical */
*result = MPI_IDENT;
fn_exit:
return mpi_errno;
}
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Group_compare
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Group_compare - Compares two groups
Input Parameters:
+ group1 - group1 (handle)
- group2 - group2 (handle)
Output Parameters:
. result - integer which is 'MPI_IDENT' if the order and members of
the two groups are the same, 'MPI_SIMILAR' if only the members are the same,
and 'MPI_UNEQUAL' otherwise
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_GROUP
.N MPI_ERR_ARG
@*/
int MPI_Group_compare(MPI_Group group1, MPI_Group group2, int *result)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Group *group_ptr1 = NULL;
MPIR_Group *group_ptr2 = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_GROUP_COMPARE);
MPIR_ERRTEST_INITIALIZED_ORDIE();
/* The routines that setup the group data structures must be executed
* within a mutex. As most of the group routines are not performance
* critical, we simple run these routines within the SINGLE_CS */
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_GROUP_COMPARE);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_ARGNULL(result, "result", mpi_errno);
MPIR_ERRTEST_GROUP(group1, mpi_errno);
MPIR_ERRTEST_GROUP(group2, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif
/* Convert MPI object handles to object pointers */
MPIR_Group_get_ptr(group1, group_ptr1);
MPIR_Group_get_ptr(group2, group_ptr2);
/* Validate parameters and objects (post conversion) */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate group_ptr */
MPIR_Group_valid_ptr(group_ptr1, mpi_errno);
MPIR_Group_valid_ptr(group_ptr2, mpi_errno);
/* If group_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_Group_compare_impl(group_ptr1, group_ptr2, result);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_GROUP_COMPARE);
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
return mpi_errno;
/* --BEGIN ERROR HANDLING-- */
fn_fail:
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_group_compare", "**mpi_group_compare %G %G %p", group1,
group2, result);
}
mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}