b0c293c5ab
BUG=webrtc:5740 Review URL: https://codereview.webrtc.org/1859413002 Cr-Commit-Position: refs/heads/master@{#12275}
105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
/*
|
|
* Copyright 2005 The WebRTC Project Authors. All rights reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef WEBRTC_BASE_TIMEUTILS_H_
|
|
#define WEBRTC_BASE_TIMEUTILS_H_
|
|
|
|
#include <ctime>
|
|
#include <time.h>
|
|
|
|
#include "webrtc/base/basictypes.h"
|
|
|
|
namespace rtc {
|
|
|
|
static const int64_t kNumMillisecsPerSec = INT64_C(1000);
|
|
static const int64_t kNumMicrosecsPerSec = INT64_C(1000000);
|
|
static const int64_t kNumNanosecsPerSec = INT64_C(1000000000);
|
|
|
|
static const int64_t kNumMicrosecsPerMillisec =
|
|
kNumMicrosecsPerSec / kNumMillisecsPerSec;
|
|
static const int64_t kNumNanosecsPerMillisec =
|
|
kNumNanosecsPerSec / kNumMillisecsPerSec;
|
|
static const int64_t kNumNanosecsPerMicrosec =
|
|
kNumNanosecsPerSec / kNumMicrosecsPerSec;
|
|
|
|
typedef uint32_t TimeStamp;
|
|
|
|
// Returns the current time in milliseconds in 32 bits.
|
|
uint32_t Time32();
|
|
|
|
// Returns the current time in milliseconds in 64 bits.
|
|
int64_t Time64();
|
|
|
|
// Returns the current time in milliseconds.
|
|
// TODO(honghaiz): Returns Time64 once majority of the webrtc code migrates to
|
|
// 64-bit timestamp.
|
|
inline uint32_t Time() {
|
|
return Time32();
|
|
}
|
|
|
|
// Returns the current time in microseconds.
|
|
uint64_t TimeMicros();
|
|
// Returns the current time in nanoseconds.
|
|
uint64_t TimeNanos();
|
|
|
|
// Returns a future timestamp, 'elapsed' milliseconds from now.
|
|
uint32_t TimeAfter(int32_t elapsed);
|
|
|
|
bool TimeIsLaterOrEqual(uint32_t earlier, uint32_t later); // Inclusive
|
|
bool TimeIsLater(uint32_t earlier, uint32_t later); // Exclusive
|
|
|
|
// Returns the later of two timestamps.
|
|
inline uint32_t TimeMax(uint32_t ts1, uint32_t ts2) {
|
|
return TimeIsLaterOrEqual(ts1, ts2) ? ts2 : ts1;
|
|
}
|
|
|
|
// Returns the earlier of two timestamps.
|
|
inline uint32_t TimeMin(uint32_t ts1, uint32_t ts2) {
|
|
return TimeIsLaterOrEqual(ts1, ts2) ? ts1 : ts2;
|
|
}
|
|
|
|
// Number of milliseconds that would elapse between 'earlier' and 'later'
|
|
// timestamps. The value is negative if 'later' occurs before 'earlier'.
|
|
int32_t TimeDiff(uint32_t later, uint32_t earlier);
|
|
|
|
// Number of milliseconds that would elapse between 'earlier' and 'later'
|
|
// timestamps. The value is negative if 'later' occurs before 'earlier'.
|
|
int64_t TimeDiff64(int64_t later, int64_t earlier);
|
|
|
|
// The number of milliseconds that have elapsed since 'earlier'.
|
|
inline int32_t TimeSince(uint32_t earlier) {
|
|
return TimeDiff(Time(), earlier);
|
|
}
|
|
|
|
// The number of milliseconds that will elapse between now and 'later'.
|
|
inline int32_t TimeUntil(uint32_t later) {
|
|
return TimeDiff(later, Time());
|
|
}
|
|
|
|
class TimestampWrapAroundHandler {
|
|
public:
|
|
TimestampWrapAroundHandler();
|
|
|
|
int64_t Unwrap(uint32_t ts);
|
|
|
|
private:
|
|
uint32_t last_ts_;
|
|
int64_t num_wrap_;
|
|
};
|
|
|
|
// Convert from std::tm, which is relative to 1900-01-01 00:00 to number of
|
|
// seconds from 1970-01-01 00:00 ("epoch"). Don't return time_t since that
|
|
// is still 32 bits on many systems.
|
|
int64_t TmToSeconds(const std::tm& tm);
|
|
|
|
} // namespace rtc
|
|
|
|
#endif // WEBRTC_BASE_TIMEUTILS_H_
|