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