speedup mechanism to manipulate gnunet time

1 files changed, 94 insertions, 0 deletions

diff --git a/src/util/speedup.c b/src/util/speedup.c
new file mode 100644
index 000000000..6a17f3132
--- /dev/null
+++ b/src/util/speedup.c
@@ -0,0 +1,94 @@
+/*
+     This file is part of GNUnet.
+     (C) 2001, 2002, 2006, 2009 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, 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
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file util/speedup.c
+ * @author Matthias Wachs
+ * @brief functions to speedup peer execution by manipulation system time
+ */
+#include "platform.h"
+#include "gnunet_time_lib.h"
+#include "gnunet_scheduler_lib.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
+
+static long long current_offset;
+static struct GNUNET_TIME_Relative interval;
+static struct GNUNET_TIME_Relative delta;
+
+static GNUNET_SCHEDULER_TaskIdentifier speedup_task;
+
+static void
+do_speedup (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  speedup_task = GNUNET_SCHEDULER_NO_TASK;
+
+  if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
+    return;
+
+  current_offset += delta.rel_value;
+  GNUNET_TIME_set_offset (current_offset);
+
+  LOG (GNUNET_ERROR_TYPE_DEBUG, "Speed up execution time by %llu ms\n", delta.rel_value);
+
+  speedup_task = GNUNET_SCHEDULER_add_delayed (interval, &do_speedup, NULL);
+}
+
+
+int
+GNUNET_SPEEDUP_start_ (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  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 ((interval.rel_value == 0) || (delta.rel_value == 0))
+  {
+    LOG (GNUNET_ERROR_TYPE_DEBUG,
+      "Speed up disabled\n");
+    return GNUNET_OK;
+  }
+
+  LOG (GNUNET_ERROR_TYPE_DEBUG,
+    "Speed up execution time %llu ms every %llu ms\n",
+    delta.rel_value, interval.rel_value);
+
+  speedup_task = GNUNET_SCHEDULER_add_now_with_lifeness (GNUNET_NO, &do_speedup, NULL);
+  return GNUNET_OK;
+}
+
+void
+GNUNET_SPEEDUP_stop_ ( )
+{
+  if (GNUNET_SCHEDULER_NO_TASK != speedup_task)
+  {
+    GNUNET_SCHEDULER_cancel (speedup_task);
+    speedup_task = GNUNET_SCHEDULER_NO_TASK;
+
+  }
+
+  LOG (GNUNET_ERROR_TYPE_DEBUG,
+      "Stopped execution speed up\n");
+}
+
+
+
+/* end of speedup.c */