2 This file is part of GNUnet.
3 (C) 2009, 2010 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 2, 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., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file statistics/statistics_api.c
23 * @brief API of the statistics service
24 * @author Christian Grothoff
27 #include "gnunet_client_lib.h"
28 #include "gnunet_constants.h"
29 #include "gnunet_container_lib.h"
30 #include "gnunet_protocols.h"
31 #include "gnunet_server_lib.h"
32 #include "gnunet_statistics_service.h"
33 #include "gnunet_strings_lib.h"
34 #include "statistics.h"
37 * How long do we wait until a statistics request for setting
38 * a value times out? (The update will be lost if the
39 * service does not react within this timeframe).
41 #define SET_TRANSMIT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
57 * Entry kept for each value we are watching.
59 struct GNUNET_STATISTICS_WatchEntry
63 * What subsystem is this action about? (never NULL)
68 * What value is this action about? (never NULL)
75 GNUNET_STATISTICS_Iterator proc;
86 * Linked list of things we still need to do.
88 struct GNUNET_STATISTICS_GetHandle
92 * This is a doubly linked list.
94 struct GNUNET_STATISTICS_GetHandle *next;
97 * This is a doubly linked list.
99 struct GNUNET_STATISTICS_GetHandle *prev;
102 * Main statistics handle.
104 struct GNUNET_STATISTICS_Handle *sh;
107 * What subsystem is this action about? (can be NULL)
112 * What value is this action about? (can be NULL)
117 * Continuation to call once action is complete.
119 GNUNET_STATISTICS_Callback cont;
122 * Function to call (for GET actions only).
124 GNUNET_STATISTICS_Iterator proc;
127 * Closure for proc and cont.
132 * Timeout for this action.
134 struct GNUNET_TIME_Absolute timeout;
142 * Flag for SET/UPDATE actions.
147 * Has the current iteration been aborted; for GET actions.
152 * Is this a GET, SET, UPDATE or WATCH?
154 enum ActionType type;
157 * Size of the message that we will be transmitting.
165 * Handle for the service.
167 struct GNUNET_STATISTICS_Handle
170 * Name of our subsystem.
175 * Configuration to use.
177 const struct GNUNET_CONFIGURATION_Handle *cfg;
180 * Socket (if available).
182 struct GNUNET_CLIENT_Connection *client;
185 * Currently pending transmission request.
187 struct GNUNET_CLIENT_TransmitHandle *th;
190 * Head of the linked list of pending actions (first action
193 struct GNUNET_STATISTICS_GetHandle *action_head;
196 * Tail of the linked list of actions (for fast append).
198 struct GNUNET_STATISTICS_GetHandle *action_tail;
201 * Action we are currently busy with (action request has been
202 * transmitted, we're now receiving the response from the
205 struct GNUNET_STATISTICS_GetHandle *current;
208 * Array of watch entries.
210 struct GNUNET_STATISTICS_WatchEntry **watches;
213 * Task doing exponential back-off trying to reconnect.
215 GNUNET_SCHEDULER_TaskIdentifier backoff_task;
218 * Time for next connect retry.
220 struct GNUNET_TIME_Relative backoff;
223 * Size of the 'watches' array.
225 unsigned int watches_size;
228 * Should this handle auto-destruct once all actions have
234 * Are we currently receiving from the service?
243 * Schedule the next action to be performed.
245 static void schedule_action (struct GNUNET_STATISTICS_Handle *h);
248 * Try to (re)connect to the statistics service.
250 * @return GNUNET_YES on success, GNUNET_NO on failure.
252 static int try_connect (struct GNUNET_STATISTICS_Handle *ret);
256 insert_ai (struct GNUNET_STATISTICS_Handle *h,
257 struct GNUNET_STATISTICS_GetHandle *ai)
259 GNUNET_CONTAINER_DLL_insert_after (h->action_head, h->action_tail,
261 if (h->action_head == ai)
267 schedule_watch_request (struct GNUNET_STATISTICS_Handle *h,
268 struct GNUNET_STATISTICS_WatchEntry *watch)
271 struct GNUNET_STATISTICS_GetHandle *ai;
276 GNUNET_assert (h != NULL);
277 if (GNUNET_YES != try_connect (h))
282 slen = strlen (watch->subsystem) + 1;
283 nlen = strlen (watch->name) + 1;
284 nsize = sizeof (struct GNUNET_MessageHeader) + slen + nlen;
285 if (nsize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
290 ai = GNUNET_malloc (sizeof (struct GNUNET_STATISTICS_GetHandle));
292 ai->subsystem = GNUNET_strdup (watch->subsystem);
293 ai->name = GNUNET_strdup (watch->name);
294 ai->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
296 ai->type = ACTION_WATCH;
297 ai->proc = watch->proc;
298 ai->cls = watch->proc_cls;
304 * Try to (re)connect to the statistics service.
306 * @return GNUNET_YES on success, GNUNET_NO on failure.
309 try_connect (struct GNUNET_STATISTICS_Handle *ret)
313 if (ret->client != NULL)
315 ret->client = GNUNET_CLIENT_connect ("statistics", ret->cfg);
316 if (ret->client != NULL)
318 for (i = 0; i < ret->watches_size; i++)
319 schedule_watch_request (ret, ret->watches[i]);
323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
324 _("Failed to connect to statistics service!\n"));
331 * Free memory associated with the given action item.
334 free_action_item (struct GNUNET_STATISTICS_GetHandle *ai)
336 GNUNET_free_non_null (ai->subsystem);
337 GNUNET_free_non_null (ai->name);
343 * GET processing is complete, tell client about it.
346 finish (struct GNUNET_STATISTICS_Handle *h, int code)
348 struct GNUNET_STATISTICS_GetHandle *pos = h->current;
354 if (pos->cont != NULL)
355 pos->cont (pos->cls, code);
356 free_action_item (pos);
362 * Process the message.
364 * @return GNUNET_OK if the message was well-formed
367 process_message (struct GNUNET_STATISTICS_Handle *h,
368 const struct GNUNET_MessageHeader *msg)
372 const struct GNUNET_STATISTICS_ReplyMessage *smsg;
375 if (h->current->aborted)
378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
379 "Iteration was aborted, ignoring VALUE\n");
381 return GNUNET_OK; /* don't bother */
383 size = ntohs (msg->size);
384 if (size < sizeof (struct GNUNET_STATISTICS_ReplyMessage))
387 return GNUNET_SYSERR;
389 smsg = (const struct GNUNET_STATISTICS_ReplyMessage *) msg;
390 size -= sizeof (struct GNUNET_STATISTICS_ReplyMessage);
392 GNUNET_STRINGS_buffer_tokenize ((const char *) &smsg[1], size, 2,
396 return GNUNET_SYSERR;
399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
400 "Received valid statistic on `%s:%s': %llu\n", service, name,
401 GNUNET_ntohll (smsg->value));
404 h->current->proc (h->current->cls, service, name,
405 GNUNET_ntohll (smsg->value),
407 (ntohl (smsg->uid) & GNUNET_STATISTICS_PERSIST_BIT)))
410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
411 "Processing of remaining statistics aborted by client.\n");
413 h->current->aborted = GNUNET_YES;
416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "VALUE processed successfully\n");
423 process_watch_value (struct GNUNET_STATISTICS_Handle *h,
424 const struct GNUNET_MessageHeader *msg)
426 const struct GNUNET_STATISTICS_WatchValueMessage *wvm;
427 struct GNUNET_STATISTICS_WatchEntry *w;
430 if (sizeof (struct GNUNET_STATISTICS_WatchValueMessage) != ntohs (msg->size))
433 return GNUNET_SYSERR;
435 wvm = (const struct GNUNET_STATISTICS_WatchValueMessage *) msg;
436 GNUNET_break (0 == ntohl (wvm->reserved));
437 wid = ntohl (wvm->wid);
438 if (wid >= h->watches_size)
441 return GNUNET_SYSERR;
444 (void) w->proc (w->proc_cls, w->subsystem, w->name,
445 GNUNET_ntohll (wvm->value),
446 0 != (ntohl (wvm->flags) & GNUNET_STATISTICS_PERSIST_BIT));
452 * Function called with messages from stats service.
455 * @param msg message received, NULL on timeout or fatal error
458 receive_stats (void *cls, const struct GNUNET_MessageHeader *msg)
460 struct GNUNET_STATISTICS_Handle *h = cls;
464 if (NULL != h->client)
466 GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
470 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
471 "Error receiving statistics from service, is the service running?\n");
473 finish (h, GNUNET_SYSERR);
476 switch (ntohs (msg->type))
478 case GNUNET_MESSAGE_TYPE_STATISTICS_END:
480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received end of statistics marker\n");
482 h->backoff = GNUNET_TIME_UNIT_MILLISECONDS;
483 if (h->watches_size > 0)
485 GNUNET_CLIENT_receive (h->client, &receive_stats, h,
486 GNUNET_TIME_UNIT_FOREVER_REL);
490 h->receiving = GNUNET_NO;
492 finish (h, GNUNET_OK);
494 case GNUNET_MESSAGE_TYPE_STATISTICS_VALUE:
495 if (GNUNET_OK == process_message (h, msg))
497 /* finally, look for more! */
499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
500 "Processing VALUE done, now reading more\n");
502 GNUNET_CLIENT_receive (h->client, &receive_stats, h,
503 GNUNET_TIME_absolute_get_remaining (h->current->
505 h->backoff = GNUNET_TIME_UNIT_MILLISECONDS;
510 case GNUNET_MESSAGE_TYPE_STATISTICS_WATCH_VALUE:
511 if (GNUNET_OK == process_watch_value (h, msg))
513 h->backoff = GNUNET_TIME_UNIT_MILLISECONDS;
514 GNUNET_assert (h->watches_size > 0);
515 GNUNET_CLIENT_receive (h->client, &receive_stats, h,
516 GNUNET_TIME_UNIT_FOREVER_REL);
525 if (NULL != h->client)
527 GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
530 finish (h, GNUNET_SYSERR);
535 * Transmit a GET request (and if successful, start to receive
539 transmit_get (struct GNUNET_STATISTICS_Handle *handle, size_t size, void *buf)
541 struct GNUNET_MessageHeader *hdr;
548 /* timeout / error */
550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
551 "Transmission of request for statistics failed!\n");
553 finish (handle, GNUNET_SYSERR);
556 slen1 = strlen (handle->current->subsystem) + 1;
557 slen2 = strlen (handle->current->name) + 1;
558 msize = slen1 + slen2 + sizeof (struct GNUNET_MessageHeader);
559 GNUNET_assert (msize <= size);
560 hdr = (struct GNUNET_MessageHeader *) buf;
561 hdr->size = htons (msize);
562 hdr->type = htons (GNUNET_MESSAGE_TYPE_STATISTICS_GET);
563 GNUNET_assert (slen1 + slen2 ==
564 GNUNET_STRINGS_buffer_fill ((char *) &hdr[1], slen1 + slen2, 2,
565 handle->current->subsystem,
566 handle->current->name));
567 if (!handle->receiving)
570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
571 "Transmission of GET done, now reading response\n");
573 handle->receiving = GNUNET_YES;
574 GNUNET_CLIENT_receive (handle->client, &receive_stats, handle,
575 GNUNET_TIME_absolute_get_remaining (handle->current->
583 * Transmit a WATCH request (and if successful, start to receive
587 transmit_watch (struct GNUNET_STATISTICS_Handle *handle, size_t size, void *buf)
589 struct GNUNET_MessageHeader *hdr;
596 /* timeout / error */
598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
599 "Transmission of request for statistics failed!\n");
601 finish (handle, GNUNET_SYSERR);
605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Transmitting watch request for `%s'\n",
606 handle->current->name);
608 slen1 = strlen (handle->current->subsystem) + 1;
609 slen2 = strlen (handle->current->name) + 1;
610 msize = slen1 + slen2 + sizeof (struct GNUNET_MessageHeader);
611 GNUNET_assert (msize <= size);
612 hdr = (struct GNUNET_MessageHeader *) buf;
613 hdr->size = htons (msize);
614 hdr->type = htons (GNUNET_MESSAGE_TYPE_STATISTICS_WATCH);
615 GNUNET_assert (slen1 + slen2 ==
616 GNUNET_STRINGS_buffer_fill ((char *) &hdr[1], slen1 + slen2, 2,
617 handle->current->subsystem,
618 handle->current->name));
619 if (GNUNET_YES != handle->receiving)
621 handle->receiving = GNUNET_YES;
622 GNUNET_CLIENT_receive (handle->client, &receive_stats, handle,
623 GNUNET_TIME_UNIT_FOREVER_REL);
625 finish (handle, GNUNET_OK);
631 * Transmit a SET/UPDATE request.
634 transmit_set (struct GNUNET_STATISTICS_Handle *handle, size_t size, void *buf)
636 struct GNUNET_STATISTICS_SetMessage *r;
643 finish (handle, GNUNET_SYSERR);
647 slen = strlen (handle->current->subsystem) + 1;
648 nlen = strlen (handle->current->name) + 1;
649 nsize = sizeof (struct GNUNET_STATISTICS_SetMessage) + slen + nlen;
653 finish (handle, GNUNET_SYSERR);
657 r->header.size = htons (nsize);
658 r->header.type = htons (GNUNET_MESSAGE_TYPE_STATISTICS_SET);
660 r->value = GNUNET_htonll (handle->current->value);
661 if (handle->current->make_persistent)
662 r->flags |= htonl (GNUNET_STATISTICS_SETFLAG_PERSISTENT);
663 if (handle->current->type == ACTION_UPDATE)
664 r->flags |= htonl (GNUNET_STATISTICS_SETFLAG_RELATIVE);
665 GNUNET_assert (slen + nlen ==
666 GNUNET_STRINGS_buffer_fill ((char *) &r[1], slen + nlen, 2,
667 handle->current->subsystem,
668 handle->current->name));
669 finish (handle, GNUNET_OK);
675 transmit_action (void *cls, size_t size, void *buf)
677 struct GNUNET_STATISTICS_Handle *handle = cls;
681 switch (handle->current->type)
684 ret = transmit_get (handle, size, buf);
688 ret = transmit_set (handle, size, buf);
691 ret = transmit_watch (handle, size, buf);
703 * Get handle for the statistics service.
705 * @param subsystem name of subsystem using the service
706 * @param cfg services configuration in use
707 * @return handle to use
709 struct GNUNET_STATISTICS_Handle *
710 GNUNET_STATISTICS_create (const char *subsystem,
711 const struct GNUNET_CONFIGURATION_Handle *cfg)
713 struct GNUNET_STATISTICS_Handle *ret;
715 GNUNET_assert (subsystem != NULL);
716 GNUNET_assert (cfg != NULL);
717 ret = GNUNET_malloc (sizeof (struct GNUNET_STATISTICS_Handle));
719 ret->subsystem = GNUNET_strdup (subsystem);
720 ret->backoff = GNUNET_TIME_UNIT_MILLISECONDS;
721 if (GNUNET_YES != try_connect (ret))
723 GNUNET_free (ret->subsystem);
732 * Destroy a handle (free all state associated with
735 * @param h statistics handle to destroy
736 * @param sync_first set to GNUNET_YES if pending SET requests should
740 GNUNET_STATISTICS_destroy (struct GNUNET_STATISTICS_Handle *h, int sync_first)
742 struct GNUNET_STATISTICS_GetHandle *pos;
743 struct GNUNET_STATISTICS_GetHandle *next;
744 struct GNUNET_STATISTICS_GetHandle *prev;
745 struct GNUNET_TIME_Relative timeout;
750 if (GNUNET_SCHEDULER_NO_TASK != h->backoff_task)
751 GNUNET_SCHEDULER_cancel (h->backoff_task);
754 if (h->current != NULL)
756 if (h->current->type == ACTION_GET)
758 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
760 free_action_item (h->current);
764 pos = h->action_head;
769 if (pos->type == ACTION_GET)
772 h->action_head = next;
775 free_action_item (pos);
783 h->action_tail = prev;
784 if (h->current == NULL)
786 h->current = h->action_head;
787 if (h->action_head != NULL)
789 h->action_head = h->action_head->next;
790 if (h->action_head == NULL)
791 h->action_tail = NULL;
794 h->do_destroy = GNUNET_YES;
795 if ((h->current != NULL) && (h->th == NULL))
797 timeout = GNUNET_TIME_absolute_get_remaining (h->current->timeout);
799 GNUNET_CLIENT_notify_transmit_ready (h->client, h->current->msize,
801 &transmit_action, h);
802 GNUNET_assert (NULL != h->th);
809 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
812 if (h->current != NULL)
813 free_action_item (h->current);
814 while (NULL != (pos = h->action_head))
816 h->action_head = pos->next;
817 free_action_item (pos);
819 if (h->client != NULL)
821 GNUNET_CLIENT_disconnect (h->client, GNUNET_YES);
824 for (i = 0; i < h->watches_size; i++)
826 GNUNET_free (h->watches[i]->subsystem);
827 GNUNET_free (h->watches[i]->name);
828 GNUNET_free (h->watches[i]);
830 GNUNET_array_grow (h->watches, h->watches_size, 0);
831 GNUNET_free (h->subsystem);
837 finish_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
839 struct GNUNET_STATISTICS_Handle *h = cls;
841 h->backoff_task = GNUNET_SCHEDULER_NO_TASK;
842 finish (h, GNUNET_SYSERR);
847 * Schedule the next action to be performed.
850 schedule_action (struct GNUNET_STATISTICS_Handle *h)
852 struct GNUNET_TIME_Relative timeout;
854 if (h->current != NULL)
855 return; /* action already pending */
856 if (GNUNET_YES != try_connect (h))
859 GNUNET_SCHEDULER_add_delayed (h->backoff, &finish_task, h);
860 h->backoff = GNUNET_TIME_relative_multiply (h->backoff, 2);
862 GNUNET_TIME_relative_min (h->backoff, GNUNET_CONSTANTS_SERVICE_TIMEOUT);
866 /* schedule next action */
867 h->current = h->action_head;
868 if (NULL == h->current)
872 h->do_destroy = GNUNET_NO;
873 GNUNET_STATISTICS_destroy (h, GNUNET_YES);
877 GNUNET_CONTAINER_DLL_remove (h->action_head, h->action_tail, h->current);
878 timeout = GNUNET_TIME_absolute_get_remaining (h->current->timeout);
881 GNUNET_CLIENT_notify_transmit_ready (h->client, h->current->msize,
883 &transmit_action, h)))
886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
887 "Failed to transmit request to statistics service.\n");
889 finish (h, GNUNET_SYSERR);
895 * Get statistic from the peer.
897 * @param handle identification of the statistics service
898 * @param subsystem limit to the specified subsystem, NULL for our subsystem
899 * @param name name of the statistic value, NULL for all values
900 * @param timeout after how long should we give up (and call
901 * cont with an error code)?
902 * @param cont continuation to call when done (can be NULL)
903 * @param proc function to call on each value
904 * @param cls closure for cont and proc
905 * @return NULL on error
907 struct GNUNET_STATISTICS_GetHandle *
908 GNUNET_STATISTICS_get (struct GNUNET_STATISTICS_Handle *handle,
909 const char *subsystem, const char *name,
910 struct GNUNET_TIME_Relative timeout,
911 GNUNET_STATISTICS_Callback cont,
912 GNUNET_STATISTICS_Iterator proc, void *cls)
916 struct GNUNET_STATISTICS_GetHandle *ai;
918 GNUNET_assert (handle != NULL);
919 GNUNET_assert (proc != NULL);
920 GNUNET_assert (GNUNET_NO == handle->do_destroy);
921 if (GNUNET_YES != try_connect (handle))
924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
925 "Failed to connect to statistics service, can not get value `%s:%s'.\n",
926 strlen (subsystem) ? subsystem : "*",
927 strlen (name) ? name : "*");
931 if (subsystem == NULL)
935 slen1 = strlen (subsystem) + 1;
936 slen2 = strlen (name) + 1;
937 GNUNET_assert (slen1 + slen2 + sizeof (struct GNUNET_MessageHeader) <
938 GNUNET_SERVER_MAX_MESSAGE_SIZE);
939 ai = GNUNET_malloc (sizeof (struct GNUNET_STATISTICS_GetHandle));
941 ai->subsystem = GNUNET_strdup (subsystem);
942 ai->name = GNUNET_strdup (name);
946 ai->timeout = GNUNET_TIME_relative_to_absolute (timeout);
947 ai->type = ACTION_GET;
948 ai->msize = slen1 + slen2 + sizeof (struct GNUNET_MessageHeader);
949 insert_ai (handle, ai);
955 * Cancel a 'get' request. Must be called before the 'cont'
956 * function is called.
958 * @param gh handle of the request to cancel
961 GNUNET_STATISTICS_get_cancel (struct GNUNET_STATISTICS_GetHandle *gh)
963 if (gh->sh->current == gh)
965 gh->aborted = GNUNET_YES;
969 GNUNET_CONTAINER_DLL_remove (gh->sh->action_head, gh->sh->action_tail, gh);
970 GNUNET_free (gh->name);
971 GNUNET_free (gh->subsystem);
978 * Watch statistics from the peer (be notified whenever they change).
979 * Note that the only way to cancel a "watch" request is to destroy
980 * the statistics handle given as the first argument to this call.
982 * @param handle identification of the statistics service
983 * @param subsystem limit to the specified subsystem, never NULL
984 * @param name name of the statistic value, never NULL
985 * @param proc function to call on each value
986 * @param proc_cls closure for proc
987 * @return GNUNET_OK on success, GNUNET_SYSERR on error
990 GNUNET_STATISTICS_watch (struct GNUNET_STATISTICS_Handle *handle,
991 const char *subsystem, const char *name,
992 GNUNET_STATISTICS_Iterator proc, void *proc_cls)
994 struct GNUNET_STATISTICS_WatchEntry *w;
997 return GNUNET_SYSERR;
998 w = GNUNET_malloc (sizeof (struct GNUNET_STATISTICS_WatchEntry));
999 w->subsystem = GNUNET_strdup (subsystem);
1000 w->name = GNUNET_strdup (name);
1002 w->proc_cls = proc_cls;
1003 GNUNET_array_append (handle->watches, handle->watches_size, w);
1004 schedule_watch_request (handle, w);
1010 add_setter_action (struct GNUNET_STATISTICS_Handle *h, const char *name,
1011 int make_persistent, uint64_t value, enum ActionType type)
1013 struct GNUNET_STATISTICS_GetHandle *ai;
1019 GNUNET_assert (h != NULL);
1020 GNUNET_assert (name != NULL);
1021 if (GNUNET_YES != try_connect (h))
1023 slen = strlen (h->subsystem) + 1;
1024 nlen = strlen (name) + 1;
1025 nsize = sizeof (struct GNUNET_STATISTICS_SetMessage) + slen + nlen;
1026 if (nsize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1031 ai = h->action_head;
1034 if ((0 == strcmp (ai->subsystem, h->subsystem)) &&
1035 (0 == strcmp (ai->name, name)) && ((ai->type == ACTION_UPDATE) ||
1036 (ai->type == ACTION_SET)))
1038 if (ai->type == ACTION_SET)
1040 if (type == ACTION_UPDATE)
1042 delta = (int64_t) value;
1049 if (ai->value < -delta)
1062 if (type == ACTION_UPDATE)
1064 delta = (int64_t) value;
1073 ai->timeout = GNUNET_TIME_relative_to_absolute (SET_TRANSMIT_TIMEOUT);
1074 ai->make_persistent = make_persistent;
1079 ai = GNUNET_malloc (sizeof (struct GNUNET_STATISTICS_GetHandle));
1081 ai->subsystem = GNUNET_strdup (h->subsystem);
1082 ai->name = GNUNET_strdup (name);
1083 ai->timeout = GNUNET_TIME_relative_to_absolute (SET_TRANSMIT_TIMEOUT);
1084 ai->make_persistent = make_persistent;
1093 * Set statistic value for the peer. Will always use our
1094 * subsystem (the argument used when "handle" was created).
1096 * @param handle identification of the statistics service
1097 * @param name name of the statistic value
1098 * @param value new value to set
1099 * @param make_persistent should the value be kept across restarts?
1102 GNUNET_STATISTICS_set (struct GNUNET_STATISTICS_Handle *handle,
1103 const char *name, uint64_t value, int make_persistent)
1107 GNUNET_assert (GNUNET_NO == handle->do_destroy);
1108 add_setter_action (handle, name, make_persistent, value, ACTION_SET);
1113 * Set statistic value for the peer. Will always use our
1114 * subsystem (the argument used when "handle" was created).
1116 * @param handle identification of the statistics service
1117 * @param name name of the statistic value
1118 * @param delta change in value (added to existing value)
1119 * @param make_persistent should the value be kept across restarts?
1122 GNUNET_STATISTICS_update (struct GNUNET_STATISTICS_Handle *handle,
1123 const char *name, int64_t delta, int make_persistent)
1129 GNUNET_assert (GNUNET_NO == handle->do_destroy);
1130 add_setter_action (handle, name, make_persistent, (uint64_t) delta,
1135 /* end of statistics_api.c */