2 This file is part of GNUnet.
3 Copyright (C) 2008--2015 GNUnet e.V.
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
22 * @file testbed/gnunet-service-testbed_connectionpool.c
23 * @brief connection pooling for connections to peers' services
24 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
27 #include "gnunet-service-testbed.h"
28 #include "gnunet-service-testbed_connectionpool.h"
29 #include "testbed_api_operations.h"
30 #include "gnunet_transport_core_service.h"
33 * Redefine LOG with a changed log component string
38 #define LOG(kind,...) \
39 GNUNET_log_from (kind, "testbed-connectionpool", __VA_ARGS__)
43 * Time to expire a cache entry
45 #define CACHE_EXPIRY \
46 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
50 * The request handle for obtaining a pooled connection
52 struct GST_ConnectionPool_GetHandle;
58 struct PooledConnection
61 * Next ptr for placing this object in the DLL of least recently used pooled
64 struct PooledConnection *next;
67 * Prev ptr for placing this object in the DLL of the least recently used
70 struct PooledConnection *prev;
73 * The transport handle to the peer corresponding to this entry; can be NULL
75 struct GNUNET_TRANSPORT_CoreHandle *handle_transport;
78 * The core handle to the peer corresponding to this entry; can be NULL
80 struct GNUNET_CORE_Handle *handle_core;
83 * The ATS handle to the peer correspondign to this entry; can be NULL.
85 struct GNUNET_ATS_ConnectivityHandle *handle_ats_connectivity;
88 * The operation handle for transport handle
90 struct GNUNET_TESTBED_Operation *op_transport;
93 * The operation handle for core handle
95 struct GNUNET_TESTBED_Operation *op_core;
98 * The operation handle for ATS handle
100 struct GNUNET_TESTBED_Operation *op_ats_connectivity;
103 * The peer identity of this peer. Will be set upon opening a connection to
104 * the peers CORE service. Will be NULL until then and after the CORE
105 * connection is closed
107 struct GNUNET_PeerIdentity *peer_identity;
110 * The configuration of the peer. Should be not NULL as long as the core_handle
111 * or transport_handle are valid
113 struct GNUNET_CONFIGURATION_Handle *cfg;
116 * DLL head for the queue to serve notifications when a peer is connected
118 struct GST_ConnectionPool_GetHandle *head_notify;
121 * DLL tail for the queue to serve notifications when a peer is connected
123 struct GST_ConnectionPool_GetHandle *tail_notify;
126 * DLL head for the queue of #GST_ConnectionPool_GetHandle requests that are
127 * waiting for this connection to be opened
129 struct GST_ConnectionPool_GetHandle *head_waiting;
132 * DLL tail for the queue of #GST_ConnectionPool_GetHandle requests that are
133 * waiting for this connection to be opened
135 struct GST_ConnectionPool_GetHandle *tail_waiting;
138 * The task to expire this connection from the connection pool
140 struct GNUNET_SCHEDULER_Task * expire_task;
143 * The task to notify a waiting #GST_ConnectionPool_GetHandle object
145 struct GNUNET_SCHEDULER_Task * notify_task;
148 * Number of active requests using this pooled connection
153 * Is this entry in LRU
158 * Is this entry present in the connection pool
163 * The index of this peer
170 * The request handle for obtaining a pooled connection
172 struct GST_ConnectionPool_GetHandle
175 * The next ptr for inclusion in the notification DLLs. At first the object
176 * is placed in the waiting DLL of the corresponding #PooledConnection
177 * object. After the handle is opened it is moved to the notification DLL if
178 * @p connect_notify_cb and @p target are not NULL
180 struct GST_ConnectionPool_GetHandle *next;
183 * The prev ptr for inclusion in the notification DLLs
185 struct GST_ConnectionPool_GetHandle *prev;
188 * The pooled connection object this handle corresponds to
190 struct PooledConnection *entry;
193 * The cache callback to call when a handle is available
195 GST_connection_pool_connection_ready_cb cb;
198 * The closure for the above callback
203 * The peer identity of the target peer. When this target peer is connected,
204 * call the notify callback
206 const struct GNUNET_PeerIdentity *target;
209 * The callback to be called for serving notification that the target peer is
212 GST_connection_pool_peer_connect_notify connect_notify_cb;
215 * The closure for the notify callback
217 void *connect_notify_cb_cls;
220 * The service we want to connect to
222 enum GST_ConnectionPool_Service service;
225 * Did we call the pool_connection_ready_cb already?
227 int connection_ready_called;
230 * Are we waiting for any peer connect notifications?
237 * A hashmap for quickly finding connections in the connection pool
239 static struct GNUNET_CONTAINER_MultiHashMap32 *map;
242 * DLL head for maitaining the least recently used #PooledConnection objects.
243 * The head is the least recently used object.
245 static struct PooledConnection *head_lru;
248 * DLL tail for maitaining the least recently used #PooledConnection objects
250 static struct PooledConnection *tail_lru;
253 * DLL head for maintaining #PooledConnection objects that are not added into
254 * the connection pool as it was full at the time the object's creation
257 static struct PooledConnection *head_not_pooled;
260 * DLL tail for maintaining #PooledConnection objects that are not added into
261 * the connection pool as it was full at the time the object's creation
263 static struct PooledConnection *tail_not_pooled;
266 * The maximum number of entries that can be present in the connection pool
268 static unsigned int max_size;
272 * Cancel the expiration task of the give #PooledConnection object
274 * @param entry the #PooledConnection object
277 expire_task_cancel (struct PooledConnection *entry);
281 * Destroy a #PooledConnection object
283 * @param entry the #PooledConnection object
286 destroy_pooled_connection (struct PooledConnection *entry)
288 GNUNET_assert ((NULL == entry->head_notify) && (NULL == entry->tail_notify));
289 GNUNET_assert ((NULL == entry->head_waiting) && (NULL ==
290 entry->tail_waiting));
291 GNUNET_assert (0 == entry->demand);
292 expire_task_cancel (entry);
294 GNUNET_CONTAINER_DLL_remove (head_lru, tail_lru, entry);
296 GNUNET_assert (GNUNET_OK ==
297 GNUNET_CONTAINER_multihashmap32_remove (map,
300 if (NULL != entry->notify_task)
302 GNUNET_SCHEDULER_cancel (entry->notify_task);
303 entry->notify_task = NULL;
305 LOG_DEBUG ("Cleaning up handles of a pooled connection\n");
306 if (NULL != entry->handle_transport)
307 GNUNET_assert (NULL != entry->op_transport);
308 if (NULL != entry->op_transport)
310 GNUNET_TESTBED_operation_done (entry->op_transport);
311 entry->op_transport = NULL;
313 if (NULL != entry->handle_ats_connectivity)
314 GNUNET_assert (NULL != entry->op_ats_connectivity);
315 if (NULL != entry->op_ats_connectivity)
317 GNUNET_TESTBED_operation_done (entry->op_ats_connectivity);
318 entry->op_ats_connectivity = NULL;
320 if (NULL != entry->op_core)
322 GNUNET_TESTBED_operation_done (entry->op_core);
323 entry->op_core = NULL;
325 GNUNET_assert (NULL == entry->handle_core);
326 GNUNET_assert (NULL == entry->handle_ats_connectivity);
327 GNUNET_assert (NULL == entry->handle_transport);
328 GNUNET_CONFIGURATION_destroy (entry->cfg);
334 * Expire a #PooledConnection object
336 * @param cls the #PooledConnection object
341 struct PooledConnection *entry = cls;
343 entry->expire_task = NULL;
344 destroy_pooled_connection (entry);
349 * Cancel the expiration task of the give #PooledConnection object
351 * @param entry the #PooledConnection object
354 expire_task_cancel (struct PooledConnection *entry)
356 if (NULL != entry->expire_task)
358 GNUNET_SCHEDULER_cancel (entry->expire_task);
359 entry->expire_task = NULL;
365 * Function to add a #PooledConnection object into LRU and begin the expiry task
367 * @param entry the #PooledConnection object
370 add_to_lru (struct PooledConnection *entry)
372 GNUNET_assert (0 == entry->demand);
373 GNUNET_assert (!entry->in_lru);
374 GNUNET_CONTAINER_DLL_insert_tail (head_lru, tail_lru, entry);
375 entry->in_lru = GNUNET_YES;
376 GNUNET_assert (NULL == entry->expire_task);
377 entry->expire_task = GNUNET_SCHEDULER_add_delayed (CACHE_EXPIRY,
383 * Function to find a #GST_ConnectionPool_GetHandle which is waiting for one of
384 * the handles in given entry which are now available.
386 * @param entry the pooled connection whose active list has to be searched
387 * @param head the starting list element in the GSTCacheGetHandle where the
388 * search has to be begin
389 * @return a suitable GSTCacheGetHandle whose handle ready notify callback
390 * hasn't been called yet. NULL if no such suitable GSTCacheGetHandle
393 static struct GST_ConnectionPool_GetHandle *
394 search_waiting (const struct PooledConnection *entry,
395 struct GST_ConnectionPool_GetHandle *head)
397 struct GST_ConnectionPool_GetHandle *gh;
399 for (gh = head; NULL != gh; gh = gh->next)
403 case GST_CONNECTIONPOOL_SERVICE_CORE:
404 if (NULL == entry->handle_core)
406 if (NULL == entry->peer_identity)
407 continue; /* CORE connection isn't ready yet */
409 case GST_CONNECTIONPOOL_SERVICE_TRANSPORT:
410 if (NULL == entry->handle_transport)
413 case GST_CONNECTIONPOOL_SERVICE_ATS_CONNECTIVITY:
414 if (NULL == entry->handle_ats_connectivity)
425 * A handle in the #PooledConnection object pointed by @a cls is ready and there
426 * is a #GST_ConnectionPool_GetHandle object waiting in the waiting list. This
427 * function retrieves that object and calls the handle ready callback. It
428 * further schedules itself if there are similar waiting objects which can be notified.
430 * @param cls the #PooledConnection object
433 connection_ready (void *cls)
435 struct PooledConnection *entry = cls;
436 struct GST_ConnectionPool_GetHandle *gh;
437 struct GST_ConnectionPool_GetHandle *gh_next;
439 GNUNET_assert (NULL != entry->notify_task);
440 entry->notify_task = NULL;
441 gh = search_waiting (entry, entry->head_waiting);
442 GNUNET_assert (NULL != gh);
444 if (NULL != gh->next)
445 gh_next = search_waiting (entry, gh->next);
446 GNUNET_CONTAINER_DLL_remove (entry->head_waiting,
449 gh->connection_ready_called = 1;
451 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready,
453 if ( (NULL != gh->target) &&
454 (NULL != gh->connect_notify_cb) )
456 GNUNET_CONTAINER_DLL_insert_tail (entry->head_notify,
459 gh->notify_waiting = 1;
461 LOG_DEBUG ("Connection ready for handle type %u\n",
465 entry->handle_transport,
466 entry->handle_ats_connectivity,
467 entry->peer_identity,
473 * Function called from peer connect notify callbacks from CORE and TRANSPORT
474 * connections. This function calls the pending peer connect notify callbacks
475 * which are queued in an entry.
477 * @param cls the #PooledConnection object
478 * @param peer the peer that connected
479 * @param service the service where this notification has originated
482 peer_connect_notify_cb (void *cls,
483 const struct GNUNET_PeerIdentity *peer,
484 const enum GST_ConnectionPool_Service service)
486 struct PooledConnection *entry = cls;
487 struct GST_ConnectionPool_GetHandle *gh;
488 struct GST_ConnectionPool_GetHandle *gh_next;
489 GST_connection_pool_peer_connect_notify cb;
492 for (gh = entry->head_notify; NULL != gh;)
494 GNUNET_assert (NULL != gh->target);
495 GNUNET_assert (NULL != gh->connect_notify_cb);
496 GNUNET_assert (gh->connection_ready_called);
497 if (service != gh->service)
502 if (0 != memcmp (gh->target,
504 sizeof (struct GNUNET_PeerIdentity)))
509 cb = gh->connect_notify_cb;
510 cb_cls = gh->connect_notify_cb_cls;
512 GNUNET_CONTAINER_DLL_remove (entry->head_notify, entry->tail_notify, gh);
513 gh->notify_waiting = 0;
514 LOG_DEBUG ("Peer connected to peer %u at service %u\n",
524 * Function called to notify transport users that another
525 * peer connected to us.
527 * @param cls the #PooledConnection object
528 * @param peer the peer that connected
529 * @param mq queue for sending data to @a peer
533 transport_peer_connect_notify_cb (void *cls,
534 const struct GNUNET_PeerIdentity *peer,
535 struct GNUNET_MQ_Handle *mq)
537 struct PooledConnection *entry = cls;
539 peer_connect_notify_cb (entry,
541 GST_CONNECTIONPOOL_SERVICE_TRANSPORT);
547 * Function called when resources for opening a connection to TRANSPORT are
550 * @param cls the #PooledConnection object
553 opstart_get_handle_transport (void *cls)
555 struct PooledConnection *entry = cls;
557 GNUNET_assert (NULL != entry);
558 LOG_DEBUG ("Opening a transport connection to peer %u\n",
560 entry->handle_transport =
561 GNUNET_TRANSPORT_core_connect (entry->cfg,
565 &transport_peer_connect_notify_cb,
568 if (NULL == entry->handle_transport)
573 if (0 == entry->demand)
575 if (NULL != entry->notify_task)
577 if (NULL != search_waiting (entry, entry->head_waiting))
579 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready, entry);
586 * Function called when the operation responsible for opening a TRANSPORT
587 * connection is marked as done.
589 * @param cls the cache entry
592 oprelease_get_handle_transport (void *cls)
594 struct PooledConnection *entry = cls;
596 if (NULL == entry->handle_transport)
598 GNUNET_TRANSPORT_core_disconnect (entry->handle_transport);
599 entry->handle_transport = NULL;
604 * Method called whenever a given peer connects at CORE level
606 * @param cls the #PooledConnection object
607 * @param peer peer identity this notification is about
608 * @param mq message queue for talking to @a peer
612 core_peer_connect_cb (void *cls,
613 const struct GNUNET_PeerIdentity *peer,
614 struct GNUNET_MQ_Handle *mq)
616 struct PooledConnection *entry = cls;
618 peer_connect_notify_cb (entry,
620 GST_CONNECTIONPOOL_SERVICE_CORE);
621 return (void *) peer;
626 * Function called after #GNUNET_CORE_connect() has succeeded (or failed
627 * for good). Note that the private key of the peer is intentionally
628 * not exposed here; if you need it, your process should try to read
629 * the private key file directly (which should work if you are
630 * authorized...). Implementations of this function must not call
631 * #GNUNET_CORE_disconnect() (other than by scheduling a new task to
634 * @param cls the #PooledConnection object
635 * @param my_identity ID of this peer, NULL if we failed
638 core_startup_cb (void *cls,
639 const struct GNUNET_PeerIdentity *my_identity)
641 struct PooledConnection *entry = cls;
643 if (NULL == my_identity)
648 GNUNET_assert (NULL == entry->peer_identity);
649 entry->peer_identity = GNUNET_new (struct GNUNET_PeerIdentity);
650 *entry->peer_identity = *my_identity;
651 if (0 == entry->demand)
653 if (NULL != entry->notify_task)
655 if (NULL != search_waiting (entry, entry->head_waiting))
657 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready, entry);
664 * Function called when resources for opening a connection to CORE are
667 * @param cls the #PooledConnection object
670 opstart_get_handle_core (void *cls)
672 struct PooledConnection *entry = cls;
674 GNUNET_assert (NULL != entry);
675 LOG_DEBUG ("Opening a CORE connection to peer %u\n",
678 = GNUNET_CORE_connect (entry->cfg,
680 &core_startup_cb, /* core startup notify */
681 &core_peer_connect_cb, /* peer connect notify */
682 NULL, /* peer disconnect notify */
688 * Function called when the operation responsible for opening a CORE
689 * connection is marked as done.
691 * @param cls the #PooledConnection object
694 oprelease_get_handle_core (void *cls)
696 struct PooledConnection *entry = cls;
698 if (NULL == entry->handle_core)
700 GNUNET_CORE_disconnect (entry->handle_core);
701 entry->handle_core = NULL;
702 GNUNET_free_non_null (entry->peer_identity);
703 entry->peer_identity = NULL;
708 * Function called when resources for opening a connection to ATS are
711 * @param cls the #PooledConnection object
714 opstart_get_handle_ats_connectivity (void *cls)
716 struct PooledConnection *entry = cls;
718 entry->handle_ats_connectivity =
719 GNUNET_ATS_connectivity_init (entry->cfg);
724 * Function called when the operation responsible for opening a ATS
725 * connection is marked as done.
727 * @param cls the #PooledConnection object
730 oprelease_get_handle_ats_connectivity (void *cls)
732 struct PooledConnection *entry = cls;
734 if (NULL == entry->handle_ats_connectivity)
736 GNUNET_ATS_connectivity_done (entry->handle_ats_connectivity);
737 entry->handle_ats_connectivity = NULL;
742 * This function will be called for every #PooledConnection object in @p map
745 * @param key current key code
746 * @param value the #PooledConnection object
747 * @return #GNUNET_YES if we should continue to
752 cleanup_iterator (void *cls,
756 struct PooledConnection *entry = value;
758 GNUNET_assert (NULL != entry);
759 destroy_pooled_connection (entry);
765 * Initialise the connection pool.
767 * @param size the size of the connection pool. Each entry in the connection
768 * pool can handle a connection to each of the services enumerated in
769 * #GST_ConnectionPool_Service
772 GST_connection_pool_init (unsigned int size)
777 GNUNET_assert (NULL == map);
778 map = GNUNET_CONTAINER_multihashmap32_create (((size * 3) / 4) + 1);
783 * Cleanup the connection pool
786 GST_connection_pool_destroy ()
788 struct PooledConnection *entry;
792 GNUNET_assert (GNUNET_SYSERR !=
793 GNUNET_CONTAINER_multihashmap32_iterate (map,
796 GNUNET_CONTAINER_multihashmap32_destroy (map);
799 while (NULL != (entry = head_lru))
801 GNUNET_CONTAINER_DLL_remove (head_lru, tail_lru, entry);
802 destroy_pooled_connection (entry);
804 GNUNET_assert (NULL == head_not_pooled);
809 * Get a connection handle to @a service. If the connection is opened before
810 * and the connection handle is present in the connection pool, it is returned
811 * through @a cb. @a peer_id is used for the lookup in the connection pool. If
812 * the connection handle is not present in the connection pool, a new connection
813 * handle is opened for the @a service using @a cfg. Additionally, @a target,
814 * @a connect_notify_cb can be specified to get notified when @a target is
815 * connected at @a service.
817 * @note @a connect_notify_cb will not be called if @a target is
818 * already connected @a service level. Use
819 * GNUNET_TRANSPORT_check_peer_connected() or a similar function from the
820 * respective @a service's API to check if the target peer is already connected or
821 * not. @a connect_notify_cb will be called only once or never (in case @a target
822 * cannot be connected or is already connected).
824 * @param peer_id the index of the peer
825 * @param cfg the configuration with which the transport handle has to be
826 * created if it was not present in the cache
827 * @param service the service of interest
828 * @param cb the callback to notify when the transport handle is available
829 * @param cb_cls the closure for @a cb
830 * @param target the peer identify of the peer whose connection to our TRANSPORT
831 * subsystem will be notified through the @a connect_notify_cb. Can be NULL
832 * @param connect_notify_cb the callback to call when the @a target peer is
833 * connected. This callback will only be called once or never again (in
834 * case the target peer cannot be connected). Can be NULL
835 * @param connect_notify_cb_cls the closure for @a connect_notify_cb
836 * @return the handle which can be used cancel or mark that the handle is no
839 struct GST_ConnectionPool_GetHandle *
840 GST_connection_pool_get_handle (unsigned int peer_id,
841 const struct GNUNET_CONFIGURATION_Handle *cfg,
842 enum GST_ConnectionPool_Service service,
843 GST_connection_pool_connection_ready_cb cb,
845 const struct GNUNET_PeerIdentity *target,
846 GST_connection_pool_peer_connect_notify connect_notify_cb,
847 void *connect_notify_cb_cls)
849 struct GST_ConnectionPool_GetHandle *gh;
850 struct PooledConnection *entry;
851 struct GNUNET_TESTBED_Operation *op;
855 peer_id32 = (uint32_t) peer_id;
859 entry = GNUNET_CONTAINER_multihashmap32_get (map, peer_id32);
864 GNUNET_assert (0 == entry->demand);
865 expire_task_cancel (entry);
866 GNUNET_CONTAINER_DLL_remove (head_lru, tail_lru, entry);
867 entry->in_lru = GNUNET_NO;
871 case GST_CONNECTIONPOOL_SERVICE_TRANSPORT:
872 handle = entry->handle_transport;
874 LOG_DEBUG ("Found TRANSPORT handle for peer %u\n",
877 case GST_CONNECTIONPOOL_SERVICE_CORE:
878 handle = entry->handle_core;
880 LOG_DEBUG ("Found CORE handle for peer %u\n",
883 case GST_CONNECTIONPOOL_SERVICE_ATS_CONNECTIVITY:
884 handle = entry->handle_ats_connectivity;
886 LOG_DEBUG ("Found ATS CONNECTIVITY handle for peer %u\n",
893 entry = GNUNET_new (struct PooledConnection);
894 entry->index = peer_id32;
896 && (GNUNET_CONTAINER_multihashmap32_size (map) < max_size))
898 GNUNET_assert (GNUNET_OK ==
899 GNUNET_CONTAINER_multihashmap32_put (map,
902 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
903 entry->in_pool = GNUNET_YES;
907 GNUNET_CONTAINER_DLL_insert_tail (head_not_pooled,
911 entry->cfg = GNUNET_CONFIGURATION_dup (cfg);
914 gh = GNUNET_new (struct GST_ConnectionPool_GetHandle);
919 gh->connect_notify_cb = connect_notify_cb;
920 gh->connect_notify_cb_cls = connect_notify_cb_cls;
921 gh->service = service;
922 GNUNET_CONTAINER_DLL_insert (entry->head_waiting,
927 if (NULL == entry->notify_task)
929 if (NULL != search_waiting (entry, entry->head_waiting))
930 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready,
938 case GST_CONNECTIONPOOL_SERVICE_TRANSPORT:
939 if (NULL != entry->op_transport)
940 return gh; /* Operation pending */
941 op = GNUNET_TESTBED_operation_create_ (entry,
942 &opstart_get_handle_transport,
943 &oprelease_get_handle_transport);
944 entry->op_transport = op;
946 case GST_CONNECTIONPOOL_SERVICE_CORE:
947 if (NULL != entry->op_core)
948 return gh; /* Operation pending */
949 op = GNUNET_TESTBED_operation_create_ (entry,
950 &opstart_get_handle_core,
951 &oprelease_get_handle_core);
954 case GST_CONNECTIONPOOL_SERVICE_ATS_CONNECTIVITY:
955 if (NULL != entry->op_ats_connectivity)
956 return gh; /* Operation pending */
957 op = GNUNET_TESTBED_operation_create_ (entry,
958 &opstart_get_handle_ats_connectivity,
959 &oprelease_get_handle_ats_connectivity);
960 entry->op_ats_connectivity = op;
963 GNUNET_TESTBED_operation_queue_insert_ (GST_opq_openfds,
965 GNUNET_TESTBED_operation_begin_wait_ (op);
971 * Relinquish a #GST_ConnectionPool_GetHandle object. If the connection
972 * associated with the object is currently being used by other
973 * #GST_ConnectionPool_GetHandle objects, it is left in the connection pool. If
974 * no other objects are using the connection and the connection pool is not full
975 * then it is placed in a LRU queue. If the connection pool is full, then
976 * connections from the LRU queue are evicted and closed to create place for this
977 * connection. If the connection pool if full and the LRU queue is empty, then
978 * the connection is closed.
980 * @param gh the handle
983 GST_connection_pool_get_handle_done (struct GST_ConnectionPool_GetHandle *gh)
985 struct PooledConnection *entry;
990 LOG_DEBUG ("Cleaning up get handle %p for service %u, peer %u\n",
992 gh->service, entry->index);
993 if (! gh->connection_ready_called)
995 GNUNET_CONTAINER_DLL_remove (entry->head_waiting,
998 if ( (NULL == search_waiting (entry, entry->head_waiting)) &&
999 (NULL != entry->notify_task) )
1001 GNUNET_SCHEDULER_cancel (entry->notify_task);
1002 entry->notify_task = NULL;
1005 if (gh->notify_waiting)
1007 GNUNET_CONTAINER_DLL_remove (entry->head_notify,
1010 gh->notify_waiting = 0;
1014 GNUNET_assert (! entry->in_lru);
1015 if (! entry->in_pool)
1016 GNUNET_CONTAINER_DLL_remove (head_not_pooled,
1021 if (GNUNET_YES == GNUNET_CONTAINER_multihashmap32_contains (map,
1024 if (GNUNET_CONTAINER_multihashmap32_size (map) == max_size)
1026 if (NULL == head_lru)
1028 destroy_pooled_connection (head_lru);
1030 GNUNET_assert (GNUNET_OK ==
1031 GNUNET_CONTAINER_multihashmap32_put (map,
1034 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1035 entry->in_pool = GNUNET_YES;
1039 GNUNET_assert (0 < entry->demand);
1041 if (0 != entry->demand)
1048 destroy_pooled_connection (entry);