Index: base/time/clock.h |
diff --git a/base/time/clock.h b/base/time/clock.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..9fef254e0200c3ce740fd666d8dfc441bbbb9670 |
--- /dev/null |
+++ b/base/time/clock.h |
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef BASE_CLOCK_H_ |
+#define BASE_CLOCK_H_ |
+ |
+#include "base/base_export.h" |
+#include "base/time.h" |
+ |
+namespace base { |
+ |
+// A Clock is an interface for objects that vend Times. It is |
+// intended to be able to test the behavior of classes with respect to |
+// time. |
+// |
+// See DefaultClock (base/default_clock.h) for the default |
+// implementation that simply uses Time::Now(). |
+// |
+// (An implementation that uses Time::SystemTime() should be added as |
+// needed.) |
+// |
+// See SimpleTestClock (base/test/simple_test_clock.h) for a simple |
+// test implementation. |
+// |
+// See TickClock (base/tick_clock.h) for the equivalent interface for |
+// TimeTicks. |
+class BASE_EXPORT Clock { |
+ public: |
+ virtual ~Clock(); |
+ |
+ // Now() must be safe to call from any thread. The caller cannot |
+ // make any ordering assumptions about the returned Time. For |
+ // example, the system clock may change to an earlier time. |
+ virtual Time Now() = 0; |
+}; |
+ |
+} // namespace base |
+ |
+#endif // BASE_CLOCK_H_ |