2 This file is part of GNUnet.
3 Copyright (C) 2008--2015 Christian Grothoff (and other contributing authors)
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"
32 * Redefine LOG with a changed log component string
37 #define LOG(kind,...) \
38 GNUNET_log_from (kind, "testbed-connectionpool", __VA_ARGS__)
42 * Time to expire a cache entry
44 #define CACHE_EXPIRY \
45 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
49 * The request handle for obtaining a pooled connection
51 struct GST_ConnectionPool_GetHandle;
57 struct PooledConnection
60 * Next ptr for placing this object in the DLL of least recently used pooled
63 struct PooledConnection *next;
66 * Prev ptr for placing this object in the DLL of the least recently used
69 struct PooledConnection *prev;
72 * The transport handle to the peer corresponding to this entry; can be NULL
74 struct GNUNET_TRANSPORT_Handle *handle_transport;
77 * The core handle to the peer corresponding to this entry; can be NULL
79 struct GNUNET_CORE_Handle *handle_core;
82 * The ATS handle to the peer correspondign to this entry; can be NULL.
84 struct GNUNET_ATS_ConnectivityHandle *handle_ats_connectivity;
87 * The operation handle for transport handle
89 struct GNUNET_TESTBED_Operation *op_transport;
92 * The operation handle for core handle
94 struct GNUNET_TESTBED_Operation *op_core;
97 * The operation handle for ATS handle
99 struct GNUNET_TESTBED_Operation *op_ats_connectivity;
102 * The peer identity of this peer. Will be set upon opening a connection to
103 * the peers CORE service. Will be NULL until then and after the CORE
104 * connection is closed
106 struct GNUNET_PeerIdentity *peer_identity;
109 * The configuration of the peer. Should be not NULL as long as the core_handle
110 * or transport_handle are valid
112 struct GNUNET_CONFIGURATION_Handle *cfg;
115 * DLL head for the queue to serve notifications when a peer is connected
117 struct GST_ConnectionPool_GetHandle *head_notify;
120 * DLL tail for the queue to serve notifications when a peer is connected
122 struct GST_ConnectionPool_GetHandle *tail_notify;
125 * DLL head for the queue of #GST_ConnectionPool_GetHandle requests that are
126 * waiting for this connection to be opened
128 struct GST_ConnectionPool_GetHandle *head_waiting;
131 * DLL tail for the queue of #GST_ConnectionPool_GetHandle requests that are
132 * waiting for this connection to be opened
134 struct GST_ConnectionPool_GetHandle *tail_waiting;
137 * The task to expire this connection from the connection pool
139 struct GNUNET_SCHEDULER_Task * expire_task;
142 * The task to notify a waiting #GST_ConnectionPool_GetHandle object
144 struct GNUNET_SCHEDULER_Task * notify_task;
147 * Number of active requests using this pooled connection
152 * Is this entry in LRU
157 * Is this entry present in the connection pool
162 * The index of this peer
169 * The request handle for obtaining a pooled connection
171 struct GST_ConnectionPool_GetHandle
174 * The next ptr for inclusion in the notification DLLs. At first the object
175 * is placed in the waiting DLL of the corresponding #PooledConnection
176 * object. After the handle is opened it is moved to the notification DLL if
177 * @p connect_notify_cb and @p target are not NULL
179 struct GST_ConnectionPool_GetHandle *next;
182 * The prev ptr for inclusion in the notification DLLs
184 struct GST_ConnectionPool_GetHandle *prev;
187 * The pooled connection object this handle corresponds to
189 struct PooledConnection *entry;
192 * The cache callback to call when a handle is available
194 GST_connection_pool_connection_ready_cb cb;
197 * The closure for the above callback
202 * The peer identity of the target peer. When this target peer is connected,
203 * call the notify callback
205 const struct GNUNET_PeerIdentity *target;
208 * The callback to be called for serving notification that the target peer is
211 GST_connection_pool_peer_connect_notify connect_notify_cb;
214 * The closure for the notify callback
216 void *connect_notify_cb_cls;
219 * The service we want to connect to
221 enum GST_ConnectionPool_Service service;
224 * Did we call the pool_connection_ready_cb already?
226 int connection_ready_called;
229 * Are we waiting for any peer connect notifications?
236 * A hashmap for quickly finding connections in the connection pool
238 static struct GNUNET_CONTAINER_MultiHashMap32 *map;
241 * DLL head for maitaining the least recently used #PooledConnection objects.
242 * The head is the least recently used object.
244 static struct PooledConnection *head_lru;
247 * DLL tail for maitaining the least recently used #PooledConnection objects
249 static struct PooledConnection *tail_lru;
252 * DLL head for maintaining #PooledConnection objects that are not added into
253 * the connection pool as it was full at the time the object's creation
256 static struct PooledConnection *head_not_pooled;
259 * DLL tail for maintaining #PooledConnection objects that are not added into
260 * the connection pool as it was full at the time the object's creation
262 static struct PooledConnection *tail_not_pooled;
265 * The maximum number of entries that can be present in the connection pool
267 static unsigned int max_size;
271 * Cancel the expiration task of the give #PooledConnection object
273 * @param entry the #PooledConnection object
276 expire_task_cancel (struct PooledConnection *entry);
280 * Destroy a #PooledConnection object
282 * @param entry the #PooledConnection object
285 destroy_pooled_connection (struct PooledConnection *entry)
287 GNUNET_assert ((NULL == entry->head_notify) && (NULL == entry->tail_notify));
288 GNUNET_assert ((NULL == entry->head_waiting) && (NULL ==
289 entry->tail_waiting));
290 GNUNET_assert (0 == entry->demand);
291 expire_task_cancel (entry);
293 GNUNET_CONTAINER_DLL_remove (head_lru, tail_lru, entry);
295 GNUNET_assert (GNUNET_OK ==
296 GNUNET_CONTAINER_multihashmap32_remove (map,
299 if (NULL != entry->notify_task)
301 GNUNET_SCHEDULER_cancel (entry->notify_task);
302 entry->notify_task = NULL;
304 LOG_DEBUG ("Cleaning up handles of a pooled connection\n");
305 if (NULL != entry->handle_transport)
306 GNUNET_assert (NULL != entry->op_transport);
307 if (NULL != entry->op_transport)
309 GNUNET_TESTBED_operation_done (entry->op_transport);
310 entry->op_transport = NULL;
312 if (NULL != entry->handle_ats_connectivity)
313 GNUNET_assert (NULL != entry->op_ats_connectivity);
314 if (NULL != entry->op_ats_connectivity)
316 GNUNET_TESTBED_operation_done (entry->op_ats_connectivity);
317 entry->op_ats_connectivity = NULL;
319 if (NULL != entry->op_core)
321 GNUNET_TESTBED_operation_done (entry->op_core);
322 entry->op_core = NULL;
324 GNUNET_assert (NULL == entry->handle_core);
325 GNUNET_assert (NULL == entry->handle_ats_connectivity);
326 GNUNET_assert (NULL == entry->handle_transport);
327 GNUNET_CONFIGURATION_destroy (entry->cfg);
333 * Expire a #PooledConnection object
335 * @param cls the #PooledConnection object
336 * @param tc scheduler task context
340 const struct GNUNET_SCHEDULER_TaskContext *tc)
342 struct PooledConnection *entry = cls;
344 entry->expire_task = NULL;
345 destroy_pooled_connection (entry);
350 * Cancel the expiration task of the give #PooledConnection object
352 * @param entry the #PooledConnection object
355 expire_task_cancel (struct PooledConnection *entry)
357 if (NULL != entry->expire_task)
359 GNUNET_SCHEDULER_cancel (entry->expire_task);
360 entry->expire_task = NULL;
366 * Function to add a #PooledConnection object into LRU and begin the expiry task
368 * @param entry the #PooledConnection object
371 add_to_lru (struct PooledConnection *entry)
373 GNUNET_assert (0 == entry->demand);
374 GNUNET_assert (!entry->in_lru);
375 GNUNET_CONTAINER_DLL_insert_tail (head_lru, tail_lru, entry);
376 entry->in_lru = GNUNET_YES;
377 GNUNET_assert (NULL == entry->expire_task);
378 entry->expire_task = GNUNET_SCHEDULER_add_delayed (CACHE_EXPIRY,
384 * Function to find a #GST_ConnectionPool_GetHandle which is waiting for one of
385 * the handles in given entry which are now available.
387 * @param entry the pooled connection whose active list has to be searched
388 * @param head the starting list element in the GSTCacheGetHandle where the
389 * search has to be begin
390 * @return a suitable GSTCacheGetHandle whose handle ready notify callback
391 * hasn't been called yet. NULL if no such suitable GSTCacheGetHandle
394 static struct GST_ConnectionPool_GetHandle *
395 search_waiting (const struct PooledConnection *entry,
396 struct GST_ConnectionPool_GetHandle *head)
398 struct GST_ConnectionPool_GetHandle *gh;
400 for (gh = head; NULL != gh; gh = gh->next)
404 case GST_CONNECTIONPOOL_SERVICE_CORE:
405 if (NULL == entry->handle_core)
407 if (NULL == entry->peer_identity)
408 continue; /* CORE connection isn't ready yet */
410 case GST_CONNECTIONPOOL_SERVICE_TRANSPORT:
411 if (NULL == entry->handle_transport)
414 case GST_CONNECTIONPOOL_SERVICE_ATS_CONNECTIVITY:
415 if (NULL == entry->handle_ats_connectivity)
426 * A handle in the #PooledConnection object pointed by @a cls is ready and there
427 * is a #GST_ConnectionPool_GetHandle object waiting in the waiting list. This
428 * function retrieves that object and calls the handle ready callback. It
429 * further schedules itself if there are similar waiting objects which can be notified.
431 * @param cls the #PooledConnection object
432 * @param tc the task context from scheduler
435 connection_ready (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
437 struct PooledConnection *entry = cls;
438 struct GST_ConnectionPool_GetHandle *gh;
439 struct GST_ConnectionPool_GetHandle *gh_next;
441 GNUNET_assert (NULL != entry->notify_task);
442 entry->notify_task = NULL;
443 gh = search_waiting (entry, entry->head_waiting);
444 GNUNET_assert (NULL != gh);
446 if (NULL != gh->next)
447 gh_next = search_waiting (entry, gh->next);
448 GNUNET_CONTAINER_DLL_remove (entry->head_waiting,
451 gh->connection_ready_called = 1;
453 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready,
455 if ( (NULL != gh->target) &&
456 (NULL != gh->connect_notify_cb) )
458 GNUNET_CONTAINER_DLL_insert_tail (entry->head_notify,
461 gh->notify_waiting = 1;
463 LOG_DEBUG ("Connection ready for handle type %u\n",
467 entry->handle_transport,
468 entry->handle_ats_connectivity,
469 entry->peer_identity);
474 * Function called from peer connect notify callbacks from CORE and TRANSPORT
475 * connections. This function calls the pending peer connect notify callbacks
476 * which are queued in an entry.
478 * @param cls the #PooledConnection object
479 * @param peer the peer that connected
480 * @param service the service where this notification has originated
483 peer_connect_notify_cb (void *cls,
484 const struct GNUNET_PeerIdentity *peer,
485 const enum GST_ConnectionPool_Service service)
487 struct PooledConnection *entry = cls;
488 struct GST_ConnectionPool_GetHandle *gh;
489 struct GST_ConnectionPool_GetHandle *gh_next;
490 GST_connection_pool_peer_connect_notify cb;
493 for (gh = entry->head_notify; NULL != gh;)
495 GNUNET_assert (NULL != gh->target);
496 GNUNET_assert (NULL != gh->connect_notify_cb);
497 GNUNET_assert (gh->connection_ready_called);
498 if (service != gh->service)
503 if (0 != memcmp (gh->target,
505 sizeof (struct GNUNET_PeerIdentity)))
510 cb = gh->connect_notify_cb;
511 cb_cls = gh->connect_notify_cb_cls;
513 GNUNET_CONTAINER_DLL_remove (entry->head_notify, entry->tail_notify, gh);
514 gh->notify_waiting = 0;
515 LOG_DEBUG ("Peer connected to peer %u at service %u\n",
525 * Function called to notify transport users that another
526 * peer connected to us.
528 * @param cls the #PooledConnection object
529 * @param peer the peer that connected
532 transport_peer_connect_notify_cb (void *cls,
533 const struct GNUNET_PeerIdentity *peer)
535 struct PooledConnection *entry = cls;
537 peer_connect_notify_cb (entry,
539 GST_CONNECTIONPOOL_SERVICE_TRANSPORT);
544 * Function called when resources for opening a connection to TRANSPORT are
547 * @param cls the #PooledConnection object
550 opstart_get_handle_transport (void *cls)
552 struct PooledConnection *entry = cls;
554 GNUNET_assert (NULL != entry);
555 LOG_DEBUG ("Opening a transport connection to peer %u\n", entry->index);
556 entry->handle_transport =
557 GNUNET_TRANSPORT_connect (entry->cfg, NULL, entry, NULL,
558 &transport_peer_connect_notify_cb, NULL);
559 if (NULL == entry->handle_transport)
564 if (0 == entry->demand)
566 if (NULL != entry->notify_task)
568 if (NULL != search_waiting (entry, entry->head_waiting))
570 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready, entry);
577 * Function called when the operation responsible for opening a TRANSPORT
578 * connection is marked as done.
580 * @param cls the cache entry
583 oprelease_get_handle_transport (void *cls)
585 struct PooledConnection *entry = cls;
587 if (NULL == entry->handle_transport)
589 GNUNET_TRANSPORT_disconnect (entry->handle_transport);
590 entry->handle_transport = NULL;
595 * Method called whenever a given peer connects at CORE level
597 * @param cls the #PooledConnection object
598 * @param peer peer identity this notification is about
601 core_peer_connect_cb (void *cls, const struct GNUNET_PeerIdentity *peer)
603 struct PooledConnection *entry = cls;
605 peer_connect_notify_cb (entry, peer, GST_CONNECTIONPOOL_SERVICE_CORE);
610 * Function called after #GNUNET_CORE_connect() has succeeded (or failed
611 * for good). Note that the private key of the peer is intentionally
612 * not exposed here; if you need it, your process should try to read
613 * the private key file directly (which should work if you are
614 * authorized...). Implementations of this function must not call
615 * #GNUNET_CORE_disconnect() (other than by scheduling a new task to
618 * @param cls the #PooledConnection object
619 * @param my_identity ID of this peer, NULL if we failed
622 core_startup_cb (void *cls,
623 const struct GNUNET_PeerIdentity *my_identity)
625 struct PooledConnection *entry = cls;
627 if (NULL == my_identity)
632 GNUNET_assert (NULL == entry->peer_identity);
633 entry->peer_identity = GNUNET_new (struct GNUNET_PeerIdentity);
634 memcpy (entry->peer_identity,
636 sizeof (struct GNUNET_PeerIdentity));
637 if (0 == entry->demand)
639 if (NULL != entry->notify_task)
641 if (NULL != search_waiting (entry, entry->head_waiting))
643 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready, entry);
650 * Function called when resources for opening a connection to CORE are
653 * @param cls the #PooledConnection object
656 opstart_get_handle_core (void *cls)
658 struct PooledConnection *entry = cls;
659 const struct GNUNET_CORE_MessageHandler no_handlers[] = {
663 GNUNET_assert (NULL != entry);
664 LOG_DEBUG ("Opening a CORE connection to peer %u\n", entry->index);
666 GNUNET_CORE_connect (entry->cfg, entry, /* closure */
667 &core_startup_cb, /* core startup notify */
668 &core_peer_connect_cb, /* peer connect notify */
669 NULL, /* peer disconnect notify */
670 NULL, /* inbound notify */
671 GNUNET_NO, /* inbound header only? */
672 NULL, /* outbound notify */
673 GNUNET_NO, /* outbound header only? */
679 * Function called when the operation responsible for opening a CORE
680 * connection is marked as done.
682 * @param cls the #PooledConnection object
685 oprelease_get_handle_core (void *cls)
687 struct PooledConnection *entry = cls;
689 if (NULL == entry->handle_core)
691 GNUNET_CORE_disconnect (entry->handle_core);
692 entry->handle_core = NULL;
693 GNUNET_free_non_null (entry->peer_identity);
694 entry->peer_identity = NULL;
699 * Function called when resources for opening a connection to ATS are
702 * @param cls the #PooledConnection object
705 opstart_get_handle_ats_connectivity (void *cls)
707 struct PooledConnection *entry = cls;
709 entry->handle_ats_connectivity =
710 GNUNET_ATS_connectivity_init (entry->cfg);
715 * Function called when the operation responsible for opening a ATS
716 * connection is marked as done.
718 * @param cls the #PooledConnection object
721 oprelease_get_handle_ats_connectivity (void *cls)
723 struct PooledConnection *entry = cls;
725 if (NULL == entry->handle_ats_connectivity)
727 GNUNET_ATS_connectivity_done (entry->handle_ats_connectivity);
728 entry->handle_ats_connectivity = NULL;
733 * This function will be called for every #PooledConnection object in @p map
736 * @param key current key code
737 * @param value the #PooledConnection object
738 * @return #GNUNET_YES if we should continue to
743 cleanup_iterator (void *cls,
747 struct PooledConnection *entry = value;
749 GNUNET_assert (NULL != entry);
750 destroy_pooled_connection (entry);
756 * Initialise the connection pool.
758 * @param size the size of the connection pool. Each entry in the connection
759 * pool can handle a connection to each of the services enumerated in
760 * #GST_ConnectionPool_Service
763 GST_connection_pool_init (unsigned int size)
768 GNUNET_assert (NULL == map);
769 map = GNUNET_CONTAINER_multihashmap32_create (((size * 3) / 4) + 1);
774 * Cleanup the connection pool
777 GST_connection_pool_destroy ()
779 struct PooledConnection *entry;
783 GNUNET_assert (GNUNET_SYSERR !=
784 GNUNET_CONTAINER_multihashmap32_iterate (map,
787 GNUNET_CONTAINER_multihashmap32_destroy (map);
790 while (NULL != (entry = head_lru))
792 GNUNET_CONTAINER_DLL_remove (head_lru, tail_lru, entry);
793 destroy_pooled_connection (entry);
795 GNUNET_assert (NULL == head_not_pooled);
800 * Get a connection handle to @a service. If the connection is opened before
801 * and the connection handle is present in the connection pool, it is returned
802 * through @a cb. @a peer_id is used for the lookup in the connection pool. If
803 * the connection handle is not present in the connection pool, a new connection
804 * handle is opened for the @a service using @a cfg. Additionally, @a target,
805 * @a connect_notify_cb can be specified to get notified when @a target is
806 * connected at @a service.
808 * @note @a connect_notify_cb will not be called if @a target is
809 * already connected @a service level. Use
810 * GNUNET_TRANSPORT_check_peer_connected() or a similar function from the
811 * respective @a service's API to check if the target peer is already connected or
812 * not. @a connect_notify_cb will be called only once or never (in case @a target
813 * cannot be connected or is already connected).
815 * @param peer_id the index of the peer
816 * @param cfg the configuration with which the transport handle has to be
817 * created if it was not present in the cache
818 * @param service the service of interest
819 * @param cb the callback to notify when the transport handle is available
820 * @param cb_cls the closure for @a cb
821 * @param target the peer identify of the peer whose connection to our TRANSPORT
822 * subsystem will be notified through the @a connect_notify_cb. Can be NULL
823 * @param connect_notify_cb the callback to call when the @a target peer is
824 * connected. This callback will only be called once or never again (in
825 * case the target peer cannot be connected). Can be NULL
826 * @param connect_notify_cb_cls the closure for @a connect_notify_cb
827 * @return the handle which can be used cancel or mark that the handle is no
830 struct GST_ConnectionPool_GetHandle *
831 GST_connection_pool_get_handle (unsigned int peer_id,
832 const struct GNUNET_CONFIGURATION_Handle *cfg,
833 enum GST_ConnectionPool_Service service,
834 GST_connection_pool_connection_ready_cb cb,
836 const struct GNUNET_PeerIdentity *target,
837 GST_connection_pool_peer_connect_notify connect_notify_cb,
838 void *connect_notify_cb_cls)
840 struct GST_ConnectionPool_GetHandle *gh;
841 struct PooledConnection *entry;
842 struct GNUNET_TESTBED_Operation *op;
846 peer_id32 = (uint32_t) peer_id;
850 entry = GNUNET_CONTAINER_multihashmap32_get (map, peer_id32);
855 GNUNET_assert (0 == entry->demand);
856 expire_task_cancel (entry);
857 GNUNET_CONTAINER_DLL_remove (head_lru, tail_lru, entry);
858 entry->in_lru = GNUNET_NO;
862 case GST_CONNECTIONPOOL_SERVICE_TRANSPORT:
863 handle = entry->handle_transport;
865 LOG_DEBUG ("Found TRANSPORT handle for peer %u\n",
868 case GST_CONNECTIONPOOL_SERVICE_CORE:
869 handle = entry->handle_core;
871 LOG_DEBUG ("Found CORE handle for peer %u\n",
874 case GST_CONNECTIONPOOL_SERVICE_ATS_CONNECTIVITY:
875 handle = entry->handle_ats_connectivity;
877 LOG_DEBUG ("Found ATS CONNECTIVITY handle for peer %u\n",
884 entry = GNUNET_new (struct PooledConnection);
885 entry->index = peer_id32;
887 && (GNUNET_CONTAINER_multihashmap32_size (map) < max_size))
889 GNUNET_assert (GNUNET_OK ==
890 GNUNET_CONTAINER_multihashmap32_put (map,
893 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
894 entry->in_pool = GNUNET_YES;
898 GNUNET_CONTAINER_DLL_insert_tail (head_not_pooled,
902 entry->cfg = GNUNET_CONFIGURATION_dup (cfg);
905 gh = GNUNET_new (struct GST_ConnectionPool_GetHandle);
910 gh->connect_notify_cb = connect_notify_cb;
911 gh->connect_notify_cb_cls = connect_notify_cb_cls;
912 gh->service = service;
913 GNUNET_CONTAINER_DLL_insert (entry->head_waiting,
918 if (NULL == entry->notify_task)
920 if (NULL != search_waiting (entry, entry->head_waiting))
921 entry->notify_task = GNUNET_SCHEDULER_add_now (&connection_ready,
929 case GST_CONNECTIONPOOL_SERVICE_TRANSPORT:
930 if (NULL != entry->op_transport)
931 return gh; /* Operation pending */
932 op = GNUNET_TESTBED_operation_create_ (entry,
933 &opstart_get_handle_transport,
934 &oprelease_get_handle_transport);
935 entry->op_transport = op;
937 case GST_CONNECTIONPOOL_SERVICE_CORE:
938 if (NULL != entry->op_core)
939 return gh; /* Operation pending */
940 op = GNUNET_TESTBED_operation_create_ (entry,
941 &opstart_get_handle_core,
942 &oprelease_get_handle_core);
945 case GST_CONNECTIONPOOL_SERVICE_ATS_CONNECTIVITY:
946 if (NULL != entry->op_ats_connectivity)
947 return gh; /* Operation pending */
948 op = GNUNET_TESTBED_operation_create_ (entry,
949 &opstart_get_handle_ats_connectivity,
950 &oprelease_get_handle_ats_connectivity);
951 entry->op_ats_connectivity = op;
954 GNUNET_TESTBED_operation_queue_insert_ (GST_opq_openfds,
956 GNUNET_TESTBED_operation_begin_wait_ (op);
962 * Relinquish a #GST_ConnectionPool_GetHandle object. If the connection
963 * associated with the object is currently being used by other
964 * #GST_ConnectionPool_GetHandle objects, it is left in the connection pool. If
965 * no other objects are using the connection and the connection pool is not full
966 * then it is placed in a LRU queue. If the connection pool is full, then
967 * connections from the LRU queue are evicted and closed to create place for this
968 * connection. If the connection pool if full and the LRU queue is empty, then
969 * the connection is closed.
971 * @param gh the handle
974 GST_connection_pool_get_handle_done (struct GST_ConnectionPool_GetHandle *gh)
976 struct PooledConnection *entry;
981 LOG_DEBUG ("Cleaning up get handle %p for service %u, peer %u\n",
983 gh->service, entry->index);
984 if (! gh->connection_ready_called)
986 GNUNET_CONTAINER_DLL_remove (entry->head_waiting,
989 if ( (NULL == search_waiting (entry, entry->head_waiting)) &&
990 (NULL != entry->notify_task) )
992 GNUNET_SCHEDULER_cancel (entry->notify_task);
993 entry->notify_task = NULL;
996 if (gh->notify_waiting)
998 GNUNET_CONTAINER_DLL_remove (entry->head_notify,
1001 gh->notify_waiting = 0;
1005 GNUNET_assert (! entry->in_lru);
1006 if (! entry->in_pool)
1007 GNUNET_CONTAINER_DLL_remove (head_not_pooled,
1012 if (GNUNET_YES == GNUNET_CONTAINER_multihashmap32_contains (map,
1015 if (GNUNET_CONTAINER_multihashmap32_size (map) == max_size)
1017 if (NULL == head_lru)
1019 destroy_pooled_connection (head_lru);
1021 GNUNET_assert (GNUNET_OK ==
1022 GNUNET_CONTAINER_multihashmap32_put (map,
1025 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1026 entry->in_pool = GNUNET_YES;
1030 GNUNET_assert (0 < entry->demand);
1032 if (0 != entry->demand)
1039 destroy_pooled_connection (entry);