Adding the ability to use a simulated clock for unit tests.

webrtc/base/simulatedclock.cc

Index: webrtc/base/simulatedclock.cc
diff --git a/webrtc/base/simulatedclock.cc b/webrtc/base/simulatedclock.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7c8f5175b52861db3fff5a39ab7a6ccfd922f19f
--- /dev/null
+++ b/webrtc/base/simulatedclock.cc
@@ -0,0 +1,49 @@
+/*
+ *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/simulatedclock.h"
+
+#include "webrtc/base/checks.h"
+#include "webrtc/base/messagequeue.h"
+
+namespace rtc {
+
+uint64_t SimulatedClock::TimeNanos() const {
+  CritScope cs(&lock_);
+  return time_;
+}
+
+void SimulatedClock::SetTimeNanos(uint64_t nanos) {
+  {
+    CritScope cs(&lock_);
+    RTC_DCHECK(nanos >= time_);
+    time_ = nanos;
+  }
+  MessageQueueManager::WakeAllMessageQueues();

[juberti2, 2016/04/25 20:18:22]

A comment explaining the intent here would be useful.

[Taylor Brandstetter, 2016/04/26 01:22:32]

Done.

+}
+
+void SimulatedClock::AdvanceTimeNanos(uint64_t nanos) {
+  CritScope cs(&lock_);
+  SetTimeNanos(time_ + nanos);
+}
+
+void SimulatedClock::AdvanceTimeMicros(uint64_t micros) {
+  AdvanceTimeNanos(micros * 1000);
+}
+
+void SimulatedClock::AdvanceTimeMillis(uint64_t millis) {
+  AdvanceTimeNanos(millis * 1000 * 1000);
+}
+
+void SimulatedClock::AdvanceTimeSeconds(uint64_t seconds) {
+  AdvanceTimeNanos(seconds * 1000 * 1000 * 1000);
+}
+
+}  // namespace rtc