blob: 42bea3372286f664866d45b630d64e7d9223500b [file] [log] [blame]
// Copyright 2022 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.
#include "quiche/quic/core/quic_clock.h"
#include "quiche/quic/core/quic_time.h"
#include "quiche/quic/platform/api/quic_epoll.h"
#include "quiche/quic/platform/api/quic_export.h"
namespace quic {
// Clock to efficiently retrieve an approximately accurate time from an
// EpollServer.
class QUIC_EXPORT_PRIVATE QuicEpollClock : public QuicClock {
explicit QuicEpollClock(QuicEpollServer* epoll_server);
QuicEpollClock(const QuicEpollClock&) = delete;
QuicEpollClock& operator=(const QuicEpollClock&) = delete;
~QuicEpollClock() override;
// Returns the approximate current time as a QuicTime object.
QuicTime ApproximateNow() const override;
// Returns the current time as a QuicTime object.
// Note: this use significant resources please use only if needed.
QuicTime Now() const override;
// WallNow returns the current wall-time - a time that is consistent across
// different clocks.
QuicWallTime WallNow() const override;
// Override to do less work in this implementation. The epoll clock is
// already based on system (unix epoch) time, no conversion required.
QuicTime ConvertWallTimeToQuicTime(
const QuicWallTime& walltime) const override;
QuicEpollServer* epoll_server_;
// Largest time returned from Now() so far.
mutable QuicTime largest_time_;
} // namespace quic