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// Copyright (c) 2012 The Chromium OS 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 SHILL_TIME_H_
#define SHILL_TIME_H_
#include <sys/time.h>
#include <time.h>
#include <string>
#include <base/lazy_instance.h>
namespace shill {
// Timestamp encapsulates a |monotonic| time that can be used to compare the
// relative order and distance of events as well as a |wall_clock| time that can
// be used for presenting the time in human-readable format. Note that the
// monotonic clock does not necessarily advance during suspend.
struct Timestamp {
Timestamp() : monotonic((const struct timeval) { 0 }) {}
Timestamp(const struct timeval &in_monotonic,
const std::string &in_wall_clock)
: monotonic(in_monotonic),
wall_clock(in_wall_clock) {}
struct timeval monotonic;
std::string wall_clock;
};
// A "sys/time.h" abstraction allowing mocking in tests.
class Time {
public:
virtual ~Time();
static Time *GetInstance();
// clock_gettime(CLOCK_MONOTONIC ...
virtual int GetTimeMonotonic(struct timeval *tv);
// gettimeofday
virtual int GetTimeOfDay(struct timeval *tv, struct timezone *tz);
// Returns a snapshot of the current time.
virtual Timestamp GetNow();
virtual time_t GetSecondsSinceEpoch() const;
protected:
Time();
private:
friend struct base::DefaultLazyInstanceTraits<Time>;
DISALLOW_COPY_AND_ASSIGN(Time);
};
} // namespace shill
#endif // SHILL_TIME_H_