2 This file is part of GNUnet.
3 (C) 2011-2013 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., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/speedup.c
23 * @author Matthias Wachs
24 * @brief functions to speedup peer execution by manipulation system time
27 #include "gnunet_util_lib.h"
29 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
32 static struct GNUNET_TIME_Relative interval;
34 static struct GNUNET_TIME_Relative delta;
36 static GNUNET_SCHEDULER_TaskIdentifier speedup_task;
40 do_speedup (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
42 static long long current_offset;
44 speedup_task = GNUNET_SCHEDULER_NO_TASK;
45 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
47 current_offset += delta.rel_value_us;
48 GNUNET_TIME_set_offset (current_offset);
49 LOG (GNUNET_ERROR_TYPE_DEBUG,
50 "Speeding up execution time by %s\n",
51 GNUNET_STRINGS_relative_time_to_string (delta, GNUNET_NO));
52 speedup_task = GNUNET_SCHEDULER_add_delayed (interval, &do_speedup, NULL);
57 * Start task that may speed up our system clock artificially
59 * @param cfg configuration to use
60 * @return GNUNET_OK on success, GNUNET_SYSERR if the speedup was not configured
63 GNUNET_SPEEDUP_start_ (const struct GNUNET_CONFIGURATION_Handle *cfg)
65 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "testing", "SPEEDUP_INTERVAL", &interval))
67 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "testing", "SPEEDUP_DELTA", &delta))
70 if ((0 == interval.rel_value_us) || (0 == delta.rel_value_us))
72 LOG (GNUNET_ERROR_TYPE_DEBUG,
73 "Speed up disabled\n");
76 LOG (GNUNET_ERROR_TYPE_DEBUG,
77 "Speed up execution by %s\n",
78 GNUNET_STRINGS_relative_time_to_string (delta, GNUNET_NO));
79 LOG (GNUNET_ERROR_TYPE_DEBUG,
80 "Speed up executed every %s\n",
81 GNUNET_STRINGS_relative_time_to_string (interval, GNUNET_NO));
82 speedup_task = GNUNET_SCHEDULER_add_now_with_lifeness (GNUNET_NO, &do_speedup, NULL);
88 * Stop tasks that modify clock behavior.
91 GNUNET_SPEEDUP_stop_ ( )
93 if (GNUNET_SCHEDULER_NO_TASK != speedup_task)
95 GNUNET_SCHEDULER_cancel (speedup_task);
96 speedup_task = GNUNET_SCHEDULER_NO_TASK;
98 if ( (0 != interval.rel_value_us) &&
99 (0 != delta.rel_value_us) )
100 LOG (GNUNET_ERROR_TYPE_DEBUG,
101 "Stopped execution speed up\n");
106 /* end of speedup.c */