1 files changed, 114 insertions, 0 deletions

diff --git a/src/lib/util/speedup.c b/src/lib/util/speedup.c
new file mode 100644
index 000000000..02719e56e
--- /dev/null
+++ b/src/lib/util/speedup.c
@@ -0,0 +1,114 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2011-2013 GNUnet e.V.
+
+     GNUnet is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     or (at your option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @file util/speedup.c
+ * @author Matthias Wachs
+ * @brief functions to speedup peer execution by manipulation system time
+ */
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "speedup.h"
+
+#define LOG(kind, ...) GNUNET_log_from (kind, "util-speedup", __VA_ARGS__)
+
+
+static struct GNUNET_TIME_Relative interval;
+
+static struct GNUNET_TIME_Relative delta;
+
+static struct GNUNET_SCHEDULER_Task *speedup_task;
+
+
+static void
+do_speedup (void *cls)
+{
+  static long long current_offset;
+
+  (void) cls;
+  speedup_task = NULL;
+  current_offset += delta.rel_value_us;
+  GNUNET_TIME_set_offset (current_offset);
+  LOG (GNUNET_ERROR_TYPE_DEBUG,
+       "Speeding up execution time by %s\n",
+       GNUNET_STRINGS_relative_time_to_string (delta, GNUNET_NO));
+  speedup_task = GNUNET_SCHEDULER_add_delayed (interval,
+                                               &do_speedup,
+                                               NULL);
+}
+
+
+int
+GNUNET_SPEEDUP_start_ (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  GNUNET_assert (NULL == speedup_task);
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_time (cfg,
+                                           "testing",
+                                           "SPEEDUP_INTERVAL",
+                                           &interval))
+    return GNUNET_SYSERR;
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_time (cfg,
+                                           "testing",
+                                           "SPEEDUP_DELTA",
+                                           &delta))
+    return GNUNET_SYSERR;
+
+  if ((0 == interval.rel_value_us) ||
+      (0 == delta.rel_value_us))
+  {
+    LOG (GNUNET_ERROR_TYPE_DEBUG,
+         "Speed up disabled\n");
+    return GNUNET_OK;
+  }
+  LOG (GNUNET_ERROR_TYPE_DEBUG,
+       "Speed up execution by %s\n",
+       GNUNET_STRINGS_relative_time_to_string (delta, GNUNET_NO));
+  LOG (GNUNET_ERROR_TYPE_DEBUG,
+       "Speed up executed every %s\n",
+       GNUNET_STRINGS_relative_time_to_string (interval, GNUNET_NO));
+  speedup_task = GNUNET_SCHEDULER_add_now_with_lifeness (GNUNET_NO,
+                                                         &do_speedup,
+                                                         NULL);
+  return GNUNET_OK;
+}
+
+
+/**
+ * Stop tasks that modify clock behavior.
+ */
+void
+GNUNET_SPEEDUP_stop_ ()
+{
+  if (NULL != speedup_task)
+  {
+    GNUNET_SCHEDULER_cancel (speedup_task);
+    speedup_task = NULL;
+  }
+  if ((0 != interval.rel_value_us) &&
+      (0 != delta.rel_value_us))
+    LOG (GNUNET_ERROR_TYPE_DEBUG,
+         "Stopped execution speed up\n");
+}
+
+
+/* end of speedup.c */