/// Try to get a connection to \a l from the cache.
///
/// \returns A usable connection to \a l if a connection could be
/// found, otherwise a default constructed connection.
///
/// \note The connection must be returned to the cache by calling
/// \a reclaim().
connection_type get(key_type const& l)
{
mutex_type::scoped_lock lock(mtx_);
// Check if this key already exists in the cache.
typename cache_type::iterator const it = cache_.find(l);
// Check if this key already exists in the cache.
if (it != cache_.end())
{
// Key exists in cache.
// Update LRU meta data.
key_tracker_.splice(
key_tracker_.end()
, key_tracker_
, boost::get<2>(it->second)
);
// If connections to the locality are available in the cache,
// remove the oldest one and return it.
if (!boost::get<0>(it->second).empty())
{
connection_type result = boost::get<0>(it->second).front();
boost::get<0>(it->second).pop_front();
check_invariants();
return result;
}
}
// If we get here then the item is not in the cache.
check_invariants();
return connection_type();
}
void node::add(key_t key, unique_ptr<node>& other) {
check_invariants();
assert(size < range_max);
assert(other.get() != nullptr);
const auto pos = find_pos(key);
place_key(key, pos);
children[pos + 1] = move(other);
children[pos + 1]->parent = this;
check_invariants();
}
void node::place_key(const key_t& key, const size_t pos) {
check_invariants();
for(auto i = size; i > pos; --i) {
keys[i] = keys[i - 1];
assert(!children[i+1]);
children[i+1] = move(children[i]);
}
keys[pos] = key;
++size;
check_invariants();
}
void
reach_sat_loop(reach_proc_t reach_proc, vset_t visited,
bitvector_t *reach_groups, long *eg_count, long *next_count, long *guard_count)
{
bitvector_t groups[max_sat_levels];
int empty_groups[max_sat_levels];
vset_t old_vis = vset_create(domain, -1, NULL);
vset_t prev_vis[nGrps];
for (int k = 0; k < max_sat_levels; k++)
bitvector_create(&groups[k], nGrps);
initialize_levels(groups, empty_groups, NULL, reach_groups);
for (int i = 0; i < max_sat_levels; i++)
prev_vis[i] = save_sat_levels?vset_create(domain, -1, NULL):NULL;
while (!vset_equal(old_vis, visited)) {
vset_copy(old_vis, visited);
for (int k = 0; k < max_sat_levels; k++) {
if (empty_groups[k]) continue;
Warning(infoLong, "Saturating level: %d", k);
reach_proc(visited, prev_vis[k], &groups[k], eg_count, next_count,guard_count);
check_invariants(visited, -1);
if (save_sat_levels) vset_copy(prev_vis[k], visited);
}
}
for (int k = 0; k < max_sat_levels; k++)
bitvector_free(&groups[k]);
vset_destroy(old_vis);
if (save_sat_levels)
for (int i = 0; i < max_sat_levels; i++) vset_destroy(prev_vis[i]);
}
/// Returns a connection for \a l to the cache.
///
/// \note The cache must already be aware of the connection, through
/// a prior call to \a get() or \a get_or_reserve().
void reclaim(key_type const& l, connection_type const& conn)
{
mutex_type::scoped_lock lock(mtx_);
// Search for an entry for this key.
typename cache_type::iterator const ct = cache_.find(l);
// Key should already exist in the cache. FIXME: This should
// probably throw as could easily be triggered by caller error.
BOOST_ASSERT(ct != cache_.end());
// Update LRU meta data.
key_tracker_.splice(
key_tracker_.end()
, key_tracker_
, boost::get<2>(ct->second)
);
// Add the connection to the entry.
boost::get<0>(ct->second).push_back(conn);
// FIXME: Again, this should probably throw instead of asserting,
// as invariants could be invalidated here due to caller error.
check_invariants();
}
void clear()
{
boost::lock_guard<mutex_type> lock(mtx_);
key_tracker_.clear();
cache_.clear();
check_invariants();
}
void
gl_avltree_oset_check_invariants (gl_oset_t set)
{
size_t counter = 0;
if (set->root != NULL)
check_invariants (set->root, NULL, &counter);
if (!(set->count == counter))
abort ();
}
/* For debugging. */
static unsigned int
check_invariants (gl_oset_node_t node, gl_oset_node_t parent, size_t *counterp)
{
unsigned int left_height =
(node->left != NULL ? check_invariants (node->left, node, counterp) : 0);
unsigned int right_height =
(node->right != NULL ? check_invariants (node->right, node, counterp) : 0);
int balance = (int)right_height - (int)left_height;
if (!(node->parent == parent))
abort ();
if (!(balance >= -1 && balance <= 1))
abort ();
if (!(node->balance == balance))
abort ();
(*counterp)++;
return 1 + (left_height > right_height ? left_height : right_height);
}
/// Destroys all connections in the cache, and resets all counts.
///
/// \note Calling this function while connections are still checked out
/// of the cache is a bad idea, and will violate this classes
/// invariants.
void clear()
{
mutex_type::scoped_lock lock(mtx_);
key_tracker_.clear();
cache_.clear();
connections_ = 0;
// FIXME: This should probably throw instead of asserting, as it
// can be triggered by caller error.
check_invariants();
}
/* For debugging. */
static unsigned int
check_invariants (gl_oset_node_t node, gl_oset_node_t parent, size_t *counterp)
{
unsigned int left_blackheight =
(node->left != NULL ? check_invariants (node->left, node, counterp) : 0);
unsigned int right_blackheight =
(node->right != NULL ? check_invariants (node->right, node, counterp) : 0);
if (!(node->parent == parent))
abort ();
if (!(node->color == BLACK || node->color == RED))
abort ();
if (parent == NULL && !(node->color == BLACK))
abort ();
if (!(left_blackheight == right_blackheight))
abort ();
(*counterp)++;
return left_blackheight + (node->color == BLACK ? 1 : 0);
}
/// Returns a connection for \a l to the cache.
///
/// \note The cache must already be aware of the connection, through
/// a prior call to \a get() or \a get_or_reserve().
void reclaim(key_type const& l, connection_type const& conn)
{
std::lock_guard<mutex_type> lock(mtx_);
// Search for an entry for this key.
typename cache_type::iterator const ct = cache_.find(l);
if (ct != cache_.end()) {
// Update LRU meta data.
key_tracker_.splice(
key_tracker_.end()
, key_tracker_
, lru_reference(ct->second)
);
// Return the connection back to the cache only if the number
// of connections does not need to be shrunk.
if (num_existing_connections(ct->second) <=
max_num_connections(ct->second))
{
// Add the connection to the entry.
cached_connections(ct->second).push_back(conn);
++reclaims_;
#if defined(HPX_TRACK_STATE_OF_OUTGOING_TCP_CONNECTION)
conn->set_state(Connection::state_reclaimed);
#endif
}
else
{
// Adjust the number of existing connections for this key.
decrement_connection_count(ct->second);
// do the accounting
++evictions_;
// the connection itself will go out of scope on return
#if defined(HPX_TRACK_STATE_OF_OUTGOING_TCP_CONNECTION)
conn->set_state(Connection::state_deleting);
#endif
}
// FIXME: Again, this should probably throw instead of asserting,
// as invariants could be invalidated here due to caller error.
check_invariants();
}
// else {
// // Key should already exist in the cache. FIXME: This should
// // probably throw as could easily be triggered by caller error.
// HPX_ASSERT(shutting_down_);
// }
}
void node::insert(key_t key) {
check_invariants();
if(!is_leaf()) {
auto key_pos = find_pos(key);
if(!children[key_pos])
children[key_pos] = unique_ptr<node>(new node(this));
else if(children[key_pos]->size == range_max) {
split(children[key_pos].get());
key_pos = find_pos(key);
}
children[key_pos]->insert(key);
check_invariants();
return;
}
place_key(key, find_pos(key));
check_invariants();
}
bool get(key_type const& size, connection_type& conn)
{
boost::lock_guard<mutex_type> lock(mtx_);
// Check if a matching entry exists ...
cache_type::iterator const it = cache_.lower_bound(size);
// If it does ...
if (it != cache_.end()) {
// remove the entry from the cache
conn = boost::get<0>(it->second);
key_tracker_.erase(boost::get<1>(it->second));
cache_.erase(it);
check_invariants();
return true;
}
// If we get here then the item is not in the cache.
check_invariants();
return false;
}
/* For debugging. */
static unsigned int
check_invariants (gl_list_node_t node, gl_list_node_t parent)
{
unsigned int left_height =
(node->left != NULL ? check_invariants (node->left, node) : 0);
unsigned int right_height =
(node->right != NULL ? check_invariants (node->right, node) : 0);
int balance = (int)right_height - (int)left_height;
if (!(node->parent == parent))
abort ();
if (!(node->branch_size
== (node->left != NULL ? node->left->branch_size : 0)
+ 1 + (node->right != NULL ? node->right->branch_size : 0)))
abort ();
if (!(balance >= -1 && balance <= 1))
abort ();
if (!(node->balance == balance))
abort ();
return 1 + (left_height > right_height ? left_height : right_height);
}
/// Try to get a connection to \a l from the cache.
///
/// \returns A usable connection to \a l if a connection could be
/// found, otherwise a default constructed connection.
///
/// \note The connection must be returned to the cache by calling
/// \a reclaim().
connection_type get(key_type const& l)
{
std::lock_guard<mutex_type> lock(mtx_);
// Check if this key already exists in the cache.
typename cache_type::iterator const it = cache_.find(l);
// Check if this key already exists in the cache.
if (it != cache_.end())
{
// Key exists in cache.
// Update LRU meta data.
key_tracker_.splice(
key_tracker_.end()
, key_tracker_
, lru_reference(it->second)
);
// If connections to the locality are available in the cache,
// remove the oldest one and return it.
if (!cached_connections(it->second).empty())
{
value_type& connections = cached_connections(it->second);
connection_type result = connections.front();
connections.pop_front();
++hits_;
check_invariants();
return result;
}
}
// If we get here then the item is not in the cache.
++misses_;
check_invariants();
return connection_type();
}
void
reach_sat_fix(reach_proc_t reach_proc, vset_t visited,
bitvector_t *reach_groups, long *eg_count, long *next_count, long *guard_count)
{
(void) reach_proc;
(void) guard_count;
if (PINS_USE_GUARDS)
Abort("guard-splitting not supported with saturation=sat-fix");
int level = 0;
vset_t old_vis = vset_create(domain, -1, NULL);
vset_t deadlocks = dlk_detect?vset_create(domain, -1, NULL):NULL;
vset_t dlk_temp = dlk_detect?vset_create(domain, -1, NULL):NULL;
LACE_ME;
while (!vset_equal(visited, old_vis)) {
if (trc_output != NULL) save_level(visited);
vset_copy(old_vis, visited);
stats_and_progress_report(NULL, visited, level);
level++;
for(int i = 0; i < nGrps; i++){
if (!bitvector_is_set(reach_groups, i)) continue;
expand_group_next(i, visited);
reach_chain_stop();
(*eg_count)++;
}
if (dlk_detect) vset_copy(deadlocks, visited);
if (USE_PARALLELISM) vset_least_fixpoint_par(visited, visited, group_next, nGrps);
else vset_least_fixpoint(visited, visited, group_next, nGrps);
(*next_count)++;
check_invariants(visited, level);
if (dlk_detect) {
for (int i = 0; i < nGrps; i++) {
vset_prev(dlk_temp, visited, group_next[i],deadlocks);
reduce(i, dlk_temp);
vset_minus(deadlocks, dlk_temp);
vset_clear(dlk_temp);
}
deadlock_check(deadlocks, reach_groups);
}
vset_reorder(domain);
}
vset_destroy(old_vis);
if (dlk_detect) {
vset_destroy(deadlocks);
vset_destroy(dlk_temp);
}
}
/* For debugging. */
static unsigned int
check_invariants (gl_list_node_t node, gl_list_node_t parent)
{
unsigned int left_blackheight =
(node->left != NULL ? check_invariants (node->left, node) : 0);
unsigned int right_blackheight =
(node->right != NULL ? check_invariants (node->right, node) : 0);
if (!(node->parent == parent))
abort ();
if (!(node->branch_size
== (node->left != NULL ? node->left->branch_size : 0)
+ 1 + (node->right != NULL ? node->right->branch_size : 0)))
abort ();
if (!(node->color == BLACK || node->color == RED))
abort ();
if (parent == NULL && !(node->color == BLACK))
abort ();
if (!(left_blackheight == right_blackheight))
abort ();
return left_blackheight + (node->color == BLACK ? 1 : 0);
}
void
reach_sat(reach_proc_t reach_proc, vset_t visited,
bitvector_t *reach_groups, long *eg_count, long *next_count, long *guard_count)
{
(void) reach_proc;
(void) next_count;
(void) guard_count;
if (PINS_USE_GUARDS)
Abort("guard-splitting not supported with saturation=sat");
if (act_detect != NULL && trc_output != NULL)
Abort("Action detection with trace generation not supported");
for (int i = 0; i < nGrps; i++) {
if (bitvector_is_set(reach_groups, i)) {
struct expand_info *ctx = RTmalloc(sizeof(struct expand_info));
ctx->group = i;
ctx->group_explored = group_explored[i];
ctx->eg_count = eg_count;
vrel_set_expand(group_next[i], expand_group_next_projected, ctx);
}
}
if (trc_output != NULL) save_level(visited);
stats_and_progress_report(NULL, visited, 0);
if (USE_PARALLELISM) vset_least_fixpoint_par(visited, visited, group_next, nGrps);
else vset_least_fixpoint(visited, visited, group_next, nGrps);
stats_and_progress_report(NULL, visited, 1);
check_invariants(visited, -1);
if (dlk_detect) {
vset_t deadlocks = vset_create(domain, -1, NULL);
vset_t dlk_temp = vset_create(domain, -1, NULL);
vset_copy(deadlocks, visited);
for (int i = 0; i < nGrps; i++) {
vset_prev(dlk_temp, visited, group_next[i],deadlocks);
reduce(i, dlk_temp);
vset_minus(deadlocks, dlk_temp);
vset_clear(dlk_temp);
}
deadlock_check(deadlocks, reach_groups);
vset_destroy(deadlocks);
vset_destroy(dlk_temp);
}
}
void tree::reroot() {
assert(root);
root.get()->check_invariants();
auto new_root = unique_ptr<node>(new node(nullptr));
auto old_root_raw = root.get();
root->parent = new_root.get();
new_root->children[0] = move(root);
new_root->children[0]->parent = new_root.get();
root = move(new_root);
node::split(old_root_raw);
root.get()->check_invariants();
old_root_raw->check_invariants();
}
/// Destroys all connections in the cache, and resets all counts.
///
/// \note Calling this function while connections are still checked out
/// of the cache is a bad idea, and will violate this class'
/// invariants.
void clear()
{
std::lock_guard<mutex_type> lock(mtx_);
key_tracker_.clear();
cache_.clear();
connections_ = 0;
insertions_ = 0;
evictions_ = 0;
hits_ = 0;
misses_ = 0;
reclaims_ = 0;
// FIXME: This should probably throw instead of asserting, as it
// can be triggered by caller error.
check_invariants();
}
/// Destroys all connections for the give locality in the cache, reset
/// all associated counts.
///
/// \note Calling this function while connections are still checked out
/// of the cache is a bad idea, and will violate this classes
/// invariants.
void clear(key_type const& l)
{
mutex_type::scoped_lock lock(mtx_);
// Check if this key already exists in the cache.
typename cache_type::iterator const it = cache_.find(l);
if (it != cache_.end())
{
// Remove from LRU meta data.
key_tracker_.erase(boost::get<2>(it->second));
// correct counter to avoid assertions later on
connections_ -= boost::get<1>(it->second);
// Erase entry if key exists in the cache.
cache_.erase(it);
}
// FIXME: This should probably throw instead of asserting, as it
// can be triggered by caller error.
check_invariants();
}
/// Destroys all connections for the given locality in the cache, reset
/// all associated counts.
void clear(key_type const& l, connection_type const& conn)
{
std::lock_guard<mutex_type> lock(mtx_);
// Check if this key already exists in the cache.
typename cache_type::iterator const it = cache_.find(l);
if (it != cache_.end())
{
// Adjust the number of existing connections for this key.
decrement_connection_count(it->second);
// do the accounting
++evictions_;
// the connection itself will go out of scope on return
#if defined(HPX_TRACK_STATE_OF_OUTGOING_TCP_CONNECTION)
conn->set_state(Connection::state_deleting);
#endif
}
check_invariants();
}
static void
test_boundaries (void)
{
gchar *text;
const gchar *filename;
#if GLIB_CHECK_VERSION(2, 37, 2)
filename = g_test_get_filename (G_TEST_DIST, "boundaries.utf8", NULL);
#else
filename = SRCDIR "/boundaries.utf8";
#endif
g_print ("sample file: %s\n", filename);
if (!g_file_get_contents (filename, &text, NULL, NULL))
fail ("Couldn't open sample text file");
check_invariants (text);
g_free (text);
printf ("testboundaries passed\n");
}
/// Destroys all connections for the given locality in the cache, reset
/// all associated counts.
///
/// \note Calling this function while connections are still checked out
/// of the cache is a bad idea, and will violate this classes
/// invariants.
void clear(key_type const& l)
{
std::lock_guard<mutex_type> lock(mtx_);
// Check if this key already exists in the cache.
typename cache_type::iterator it = cache_.find(l);
if (it != cache_.end())
{
// Remove from LRU meta data.
key_tracker_.erase(lru_reference(it->second));
// correct counter to avoid assertions later on
std::size_t num_existing = num_existing_connections(it->second);
connections_ -= num_existing;
evictions_ += num_existing;
// Erase entry if key exists in the cache.
cache_.erase(it);
}
// FIXME: This should probably throw instead of asserting, as it
// can be triggered by caller error.
check_invariants();
}
// add the given data_buffer to the cache, evict old entries if needed
void add(key_type const& size, connection_type const& conn)
{
boost::lock_guard<mutex_type> lock(mtx_);
if (key_tracker_.empty()) {
HPX_ASSERT(cache_.empty());
}
else {
// eviction strategy implemented here ...
// If we reached maximum capacity, evict one entry ...
// Find the least recently used key entry
key_tracker_type::iterator it = key_tracker_.begin();
while (cache_.size() >= max_cache_size_)
{
// find it ...
cache_type::iterator const kt = cache_.find(*it);
HPX_ASSERT(kt != cache_.end());
// ... remove it
cache_.erase(kt);
key_tracker_.erase(it);
it = key_tracker_.begin();
HPX_ASSERT(it != key_tracker_.end());
}
}
// Add a new entry ...
key_tracker_type::iterator it =
key_tracker_.insert(key_tracker_.end(), size);
cache_.insert(std::make_pair(size, boost::make_tuple(conn, it)));
check_invariants();
}
/// Try to get a connection to \a l from the cache, or reserve space for
/// a new connection to \a l. This function may evict entries from the
/// cache.
///
/// \returns If a connection was found in the cache, its value is
/// assigned to \a conn and this function returns true. If a
/// connection was not found but space was reserved, \a conn is
/// set such that conn.get() == 0, and this function returns
/// true. If a connection could not be found and space could
/// not be returned, \a conn is unmodified and this function
/// returns false.
/// If force_nsert is true, a new connection entry will be
/// created even if that means the cache limits will be
/// exceeded.
///
/// \note The connection must be returned to the cache by calling
/// \a reclaim().
bool get_or_reserve(key_type const& l, connection_type& conn,
bool force_insert = false)
{
std::lock_guard<mutex_type> lock(mtx_);
typename cache_type::iterator const it = cache_.find(l);
// Check if this key already exists in the cache.
if (it != cache_.end())
{
// Key exists in cache.
// Update LRU meta data.
key_tracker_.splice(
key_tracker_.end()
, key_tracker_
, lru_reference(it->second)
);
// If connections to the locality are available in the cache,
// remove the oldest one and return it.
if (!cached_connections(it->second).empty())
{
value_type& connections = cached_connections(it->second);
conn = connections.front();
connections.pop_front();
#if defined(HPX_TRACK_STATE_OF_OUTGOING_TCP_CONNECTION)
conn->set_state(Connection::state_reinitialized);
#endif
++hits_;
check_invariants();
return true;
}
// Otherwise, if we have less connections for this locality
// than the maximum, try to reserve space in the cache for a new
// connection.
if (num_existing_connections(it->second) <
max_num_connections(it->second) ||
force_insert)
{
// See if we have enough space or can make space available.
// Note that if we don't have any space and there are no
// outstanding connections for this locality, we grow the
// cache size beyond its limit (hoping that it will be
// reduced in size next time some connection is handed back
// to the cache).
if (!free_space() &&
num_existing_connections(it->second) != 0 &&
!force_insert)
{
// If we can't find or make space, give up.
++misses_;
check_invariants();
return false;
}
// Make sure the input connection shared_ptr doesn't hold
// anything.
conn.reset();
// Increase the per-locality and overall connection counts.
increment_connection_count(it->second);
// Statistics
++insertions_;
check_invariants();
return true;
}
// We've reached the maximum number of connections for this
// locality, and none of them are checked into the cache, so
// we have to give up.
++misses_;
check_invariants();
return false;
}
// Key (locality) isn't in cache.
// See if we have enough space or can make space available.
// Note that we ignore the outcome of free_space() here as we have
// to guarantee to have space for the new connection as there are
// no connections outstanding for this locality. If free_space
// fails we grow the cache size beyond its limit (hoping that it
// will be reduced in size next time some connection is handed back
// to the cache).
free_space();
// Update LRU meta data.
typename key_tracker_type::iterator kt =
key_tracker_.insert(key_tracker_.end(), l);
cache_.insert(std::make_pair(
l, util::make_tuple(
value_type(), 1, max_connections_per_locality_, kt
))
);
// Make sure the input connection shared_ptr doesn't hold anything.
conn.reset();
// Increase the overall connection counts.
++connections_;
++insertions_;
check_invariants();
return true;
}
void _GL_ATTRIBUTE_CONST
gl_avltree_list_check_invariants (gl_list_t list)
{
if (list->root != NULL)
(void) check_invariants (list->root, NULL);
}
void
gl_avltree_list_check_invariants (gl_list_t list)
{
if (list->root != NULL)
check_invariants (list->root, NULL);
}
void
gl_rbtreehash_list_check_invariants (gl_list_t list)
{
if (list->root != NULL)
check_invariants (list->root, NULL);
}
/// Try to get a connection to \a l from the cache, or reserve space for
/// a new connection to \a l. This function may evict entries from the
/// cache.
///
/// \returns If a connection was found in the cache, its value is
/// assigned to \a conn and this function returns true. If a
/// connection was not found but space was reserved, \a conn is
/// set such that conn.get() == 0, and this function returns
/// true. If a connection could not be found and space could
/// not be returned, \a conn is unmodified and this function
/// returns false.
///
/// \note The connection must be returned to the cache by calling
/// \a reclaim().
bool get_or_reserve(key_type const& l, connection_type& conn)
{
mutex_type::scoped_lock lock(mtx_);
typename cache_type::iterator const it = cache_.find(l);
// Check if this key already exists in the cache.
if (it != cache_.end())
{
// Key exists in cache.
// Update LRU meta data.
key_tracker_.splice(
key_tracker_.end()
, key_tracker_
, boost::get<2>(it->second)
);
// If connections to the locality are available in the cache,
// remove the oldest one and return it.
if (!boost::get<0>(it->second).empty())
{
conn = boost::get<0>(it->second).front();
boost::get<0>(it->second).pop_front();
check_invariants();
return true;
}
// Otherwise, if we have less connections for this locality
// than the maximum, try to reserve space in the cache for a new
// connection.
if (boost::get<1>(it->second) < max_connections_per_locality_)
{
// See if we have enough space or can make space available.
// If we can't find or make space, give up.
if (!free_space())
{
check_invariants();
return false;
}
// Make sure the input connection shared_ptr doesn't hold
// anything.
conn.reset();
// Increase the per-locality and overall connection counts.
++boost::get<1>(it->second);
++connections_;
check_invariants();
return true;
}
// We've reached the maximum number of connections for this
// locality, and none of them are checked into the cache, so
// we have to give up.
check_invariants();
return false;
}
// Key isn't in cache.
// See if we have enough space or can make space available.
// If we can't find or make space, give up.
if (!free_space())
{
check_invariants();
return false;
}
// Update LRU meta data.
typename key_tracker_type::iterator kt =
key_tracker_.insert(key_tracker_.end(), l);
cache_.insert(
std::make_pair(l, boost::make_tuple(value_type(), 1, kt)));
// Make sure the input connection shared_ptr doesn't hold anything.
conn.reset();
// Increase the overall connection counts.
++connections_;
check_invariants();
return true;
}
