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47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
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// 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 NET_QUIC_PLATFORM_API_QUIC_CLOCK_H_
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#define NET_QUIC_PLATFORM_API_QUIC_CLOCK_H_
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#include "net/quic/core/quic_time.h"
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#include "net/quic/platform/api/quic_export.h"
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namespace net {
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// Interface for retreiving the current time.
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class QUIC_EXPORT_PRIVATE QuicClock {
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public:
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QuicClock();
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virtual ~QuicClock();
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QuicClock(const QuicClock&) = delete;
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QuicClock& operator=(const QuicClock&) = delete;
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// Returns the approximate current time as a QuicTime object.
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virtual QuicTime ApproximateNow() const = 0;
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// Returns the current time as a QuicTime object.
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// Note: this use significant resources please use only if needed.
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virtual QuicTime Now() const = 0;
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// WallNow returns the current wall-time - a time that is consistent across
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// different clocks.
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virtual QuicWallTime WallNow() const = 0;
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// Converts |walltime| to a QuicTime relative to this clock's epoch.
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virtual QuicTime ConvertWallTimeToQuicTime(
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const QuicWallTime& walltime) const;
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protected:
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// Creates a new QuicTime using |time_us| as the internal value.
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QuicTime CreateTimeFromMicroseconds(uint64_t time_us) const {
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return QuicTime(time_us);
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}
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};
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} // namespace net
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#endif // NET_QUIC_PLATFORM_API_QUIC_CLOCK_H_
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