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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/class/ompi_seq_tracker.h"
OBJ_CLASS_INSTANCE(ompi_seq_tracker_range_t,
opal_list_item_t,
NULL,
NULL);
static void ompi_seq_tracker_construct(ompi_seq_tracker_t* seq_tracker) {
OBJ_CONSTRUCT(&seq_tracker->seq_ids, opal_list_t);
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*)opal_list_get_end(&seq_tracker->seq_ids);
}
static void ompi_seq_tracker_destruct(ompi_seq_tracker_t* seq_tracker)
{
opal_list_item_t* item;
while(NULL != (item = opal_list_remove_first(&seq_tracker->seq_ids)))
OBJ_RELEASE(item);
OBJ_DESTRUCT(&seq_tracker->seq_ids);
}
OBJ_CLASS_INSTANCE(
ompi_seq_tracker_t,
opal_object_t,
ompi_seq_tracker_construct,
ompi_seq_tracker_destruct);
/**
* Look for duplicate sequence number in current range.
* Must be called w/ matching lock held.
*/
bool ompi_seq_tracker_check_duplicate(
ompi_seq_tracker_t* seq_tracker,
uint32_t seq_id)
{
ompi_seq_tracker_range_t* item;
const ompi_seq_tracker_range_t* sentinel = (ompi_seq_tracker_range_t*)opal_list_get_end(&seq_tracker->seq_ids);
int8_t direction = 0; /* 1 is next, -1 is previous */
item = seq_tracker->seq_ids_current;
while(true) {
if(sentinel == item) {
return false;
} else if(item->seq_id_high >= seq_id && item->seq_id_low <= seq_id) {
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) item;
return true;
} else if(seq_id > item->seq_id_high && direction != -1) {
direction = 1;
item = (ompi_seq_tracker_range_t*) opal_list_get_next(item);
} else if(seq_id < item->seq_id_low && direction != 1) {
direction = -1;
item = (ompi_seq_tracker_range_t*) opal_list_get_prev(item);
} else {
return false;
}
}
}
/*
* insert item into sequence tracking list,
* compacts continuous regions into a single entry
* GMS::: Use a free list for the items (don't do OBJ_NEW)!
*/
void ompi_seq_tracker_insert(ompi_seq_tracker_t* seq_tracker,
uint32_t seq_id)
{
opal_list_t* seq_ids = &seq_tracker->seq_ids;
ompi_seq_tracker_range_t* item = seq_tracker->seq_ids_current;
int8_t direction = 0; /* 1 is next, -1 is previous */
ompi_seq_tracker_range_t *new_item, *next_item, *prev_item;
const ompi_seq_tracker_range_t* sentinel = (ompi_seq_tracker_range_t*)opal_list_get_end(seq_ids);
while( true ) {
if( item == sentinel ) {
new_item = OBJ_NEW(ompi_seq_tracker_range_t);
new_item->seq_id_low = new_item->seq_id_high = seq_id;
if( -1 == direction ) {
opal_list_prepend(seq_ids, (opal_list_item_t*) new_item);
} else {
opal_list_append(seq_ids, (opal_list_item_t*) new_item);
}
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) new_item;
return;
} else if(item->seq_id_high >= seq_id && item->seq_id_low <= seq_id ) {
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) item;
return;
} else if((item->seq_id_high + 1) == seq_id) {
next_item = (ompi_seq_tracker_range_t*) opal_list_get_next(item);
/* try to consolidate */
if( (sentinel != next_item) && next_item->seq_id_low == (seq_id+1)) {
item->seq_id_high = next_item->seq_id_high;
opal_list_remove_item(seq_ids, (opal_list_item_t*) next_item);
OBJ_RELEASE(next_item);
} else {
item->seq_id_high = seq_id;
}
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) item;
return;
} else if((item->seq_id_low - 1) == seq_id) {
prev_item = (ompi_seq_tracker_range_t*) opal_list_get_prev(item);
/* try to consolidate */
if( (sentinel != prev_item) && prev_item->seq_id_high == (seq_id-1)) {
item->seq_id_low = prev_item->seq_id_low;
opal_list_remove_item(seq_ids, (opal_list_item_t*) prev_item);
OBJ_RELEASE(prev_item);
} else {
item->seq_id_low = seq_id;
}
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) item;
return;
} else if(seq_id > item->seq_id_high ) {
if(direction == -1) {
/* we have gone back in the list, and we went one item too far */
new_item = OBJ_NEW(ompi_seq_tracker_range_t);
new_item->seq_id_low = new_item->seq_id_high = seq_id;
next_item = (ompi_seq_tracker_range_t*) opal_list_get_next(item);
/* insert new_item directly before item */
opal_list_insert_pos(seq_ids,
(opal_list_item_t*) next_item,
(opal_list_item_t*) new_item);
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) new_item;
return;
} else {
direction = 1;
item = (ompi_seq_tracker_range_t*) opal_list_get_next(item);
}
} else if(seq_id < item->seq_id_low) {
if(direction == 1) {
/* we have gone forward in the list, and we went one item too far */
new_item = OBJ_NEW(ompi_seq_tracker_range_t);
new_item->seq_id_low = new_item->seq_id_high = seq_id;
opal_list_insert_pos(seq_ids,
(opal_list_item_t*) item,
(opal_list_item_t*) new_item);
seq_tracker->seq_ids_current = (ompi_seq_tracker_range_t*) new_item;
return;
} else {
direction = -1;
item = (ompi_seq_tracker_range_t*) opal_list_get_prev(item);
}
} else {
return;
}
}
}
void ompi_seq_tracker_copy(ompi_seq_tracker_t* dst, ompi_seq_tracker_t* src)
{
opal_list_item_t* item;
for( item = opal_list_get_first(&src->seq_ids);
item != opal_list_get_end(&src->seq_ids);
item = opal_list_get_next(item)) {
ompi_seq_tracker_range_t* src_item = (ompi_seq_tracker_range_t*)item;
ompi_seq_tracker_range_t* dst_item = OBJ_NEW(ompi_seq_tracker_range_t);
dst_item->seq_id_high = src_item->seq_id_high;
dst_item->seq_id_low = src_item->seq_id_low;
opal_list_append(&dst->seq_ids, &dst_item->super);
if(src->seq_ids_current == src_item) {
dst->seq_ids_current = dst_item;
}
}
}
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