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Unified Diff: src/platform/time.h

Issue 23710002: Revert "Cross-compiling from Linux to Android requires -lrt for the host toolset.", "Fix Visual Stu… (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 4 months ago
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Index: src/platform/time.h
diff --git a/src/platform/time.h b/src/platform/time.h
deleted file mode 100644
index 57b894d814b87b862d1e8c687000fd89829218d3..0000000000000000000000000000000000000000
--- a/src/platform/time.h
+++ /dev/null
@@ -1,381 +0,0 @@
-// Copyright 2013 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_PLATFORM_TIME_H_
-#define V8_PLATFORM_TIME_H_
-
-#include <ctime>
-#include <limits>
-
-#include "allocation.h"
-
-// Forward declarations.
-extern "C" {
-struct _FILETIME;
-struct timeval;
-}
-
-namespace v8 {
-namespace internal {
-
-class Time;
-class TimeTicks;
-
-// -----------------------------------------------------------------------------
-// TimeDelta
-//
-// This class represents a duration of time, internally represented in
-// microseonds.
-
-class TimeDelta V8_FINAL BASE_EMBEDDED {
- public:
- TimeDelta() : delta_(0) {}
-
- // Converts units of time to TimeDeltas.
- static TimeDelta FromDays(int days);
- static TimeDelta FromHours(int hours);
- static TimeDelta FromMinutes(int minutes);
- static TimeDelta FromSeconds(int64_t seconds);
- static TimeDelta FromMilliseconds(int64_t milliseconds);
- static TimeDelta FromMicroseconds(int64_t microseconds) {
- return TimeDelta(microseconds);
- }
- static TimeDelta FromNanoseconds(int64_t nanoseconds);
-
- // Returns the time delta in some unit. The F versions return a floating
- // point value, the "regular" versions return a rounded-down value.
- //
- // InMillisecondsRoundedUp() instead returns an integer that is rounded up
- // to the next full millisecond.
- int InDays() const;
- int InHours() const;
- int InMinutes() const;
- double InSecondsF() const;
- int64_t InSeconds() const;
- double InMillisecondsF() const;
- int64_t InMilliseconds() const;
- int64_t InMillisecondsRoundedUp() const;
- int64_t InMicroseconds() const { return delta_; }
- int64_t InNanoseconds() const;
-
- TimeDelta& operator=(const TimeDelta& other) {
- delta_ = other.delta_;
- return *this;
- }
-
- // Computations with other deltas.
- TimeDelta operator+(const TimeDelta& other) const {
- return TimeDelta(delta_ + other.delta_);
- }
- TimeDelta operator-(const TimeDelta& other) const {
- return TimeDelta(delta_ - other.delta_);
- }
-
- TimeDelta& operator+=(const TimeDelta& other) {
- delta_ += other.delta_;
- return *this;
- }
- TimeDelta& operator-=(const TimeDelta& other) {
- delta_ -= other.delta_;
- return *this;
- }
- TimeDelta operator-() const {
- return TimeDelta(-delta_);
- }
-
- double TimesOf(const TimeDelta& other) const {
- return static_cast<double>(delta_) / static_cast<double>(other.delta_);
- }
- double PercentOf(const TimeDelta& other) const {
- return TimesOf(other) * 100.0;
- }
-
- // Computations with ints, note that we only allow multiplicative operations
- // with ints, and additive operations with other deltas.
- TimeDelta operator*(int64_t a) const {
- return TimeDelta(delta_ * a);
- }
- TimeDelta operator/(int64_t a) const {
- return TimeDelta(delta_ / a);
- }
- TimeDelta& operator*=(int64_t a) {
- delta_ *= a;
- return *this;
- }
- TimeDelta& operator/=(int64_t a) {
- delta_ /= a;
- return *this;
- }
- int64_t operator/(const TimeDelta& other) const {
- return delta_ / other.delta_;
- }
-
- // Comparison operators.
- bool operator==(const TimeDelta& other) const {
- return delta_ == other.delta_;
- }
- bool operator!=(const TimeDelta& other) const {
- return delta_ != other.delta_;
- }
- bool operator<(const TimeDelta& other) const {
- return delta_ < other.delta_;
- }
- bool operator<=(const TimeDelta& other) const {
- return delta_ <= other.delta_;
- }
- bool operator>(const TimeDelta& other) const {
- return delta_ > other.delta_;
- }
- bool operator>=(const TimeDelta& other) const {
- return delta_ >= other.delta_;
- }
-
- private:
- // Constructs a delta given the duration in microseconds. This is private
- // to avoid confusion by callers with an integer constructor. Use
- // FromSeconds, FromMilliseconds, etc. instead.
- explicit TimeDelta(int64_t delta) : delta_(delta) {}
-
- // Delta in microseconds.
- int64_t delta_;
-};
-
-
-// -----------------------------------------------------------------------------
-// Time
-//
-// This class represents an absolute point in time, internally represented as
-// microseconds (s/1,000,000) since 00:00:00 UTC, January 1, 1970.
-
-class Time V8_FINAL BASE_EMBEDDED {
- public:
- static const int64_t kMillisecondsPerSecond = 1000;
- static const int64_t kMicrosecondsPerMillisecond = 1000;
- static const int64_t kMicrosecondsPerSecond = kMicrosecondsPerMillisecond *
- kMillisecondsPerSecond;
- static const int64_t kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60;
- static const int64_t kMicrosecondsPerHour = kMicrosecondsPerMinute * 60;
- static const int64_t kMicrosecondsPerDay = kMicrosecondsPerHour * 24;
- static const int64_t kMicrosecondsPerWeek = kMicrosecondsPerDay * 7;
- static const int64_t kNanosecondsPerMicrosecond = 1000;
- static const int64_t kNanosecondsPerSecond = kNanosecondsPerMicrosecond *
- kMicrosecondsPerSecond;
-
- // Contains the NULL time. Use Time::Now() to get the current time.
- Time() : us_(0) {}
-
- // Returns true if the time object has not been initialized.
- bool IsNull() const { return us_ == 0; }
-
- // Returns true if the time object is the maximum time.
- bool IsMax() const { return us_ == std::numeric_limits<int64_t>::max(); }
-
- // Returns the current time. Watch out, the system might adjust its clock
- // in which case time will actually go backwards. We don't guarantee that
- // times are increasing, or that two calls to Now() won't be the same.
- static Time Now();
-
- // Returns the current time. Same as Now() except that this function always
- // uses system time so that there are no discrepancies between the returned
- // time and system time even on virtual environments including our test bot.
- // For timing sensitive unittests, this function should be used.
- static Time NowFromSystemTime();
-
- // Returns the time for epoch in Unix-like system (Jan 1, 1970).
- static Time UnixEpoch() { return Time(0); }
-
- // Returns the maximum time, which should be greater than any reasonable time
- // with which we might compare it.
- static Time Max() { return Time(std::numeric_limits<int64_t>::max()); }
-
- // Converts to/from POSIX time values.
- static Time FromTimeval(struct timeval tv);
- struct timeval ToTimeval() const;
-
- // Converts to/from Windows file times.
- static Time FromFiletime(struct _FILETIME ft);
- struct _FILETIME ToFiletime() const;
-
- // Converts to/from the Javascript convention for times, a number of
- // milliseconds since the epoch:
- static Time FromJsTime(double ms_since_epoch);
- double ToJsTime() const;
-
- Time& operator=(const Time& other) {
- us_ = other.us_;
- return *this;
- }
-
- // Compute the difference between two times.
- TimeDelta operator-(const Time& other) const {
- return TimeDelta::FromMicroseconds(us_ - other.us_);
- }
-
- // Modify by some time delta.
- Time& operator+=(const TimeDelta& delta) {
- us_ += delta.InMicroseconds();
- return *this;
- }
- Time& operator-=(const TimeDelta& delta) {
- us_ -= delta.InMicroseconds();
- return *this;
- }
-
- // Return a new time modified by some delta.
- Time operator+(const TimeDelta& delta) const {
- return Time(us_ + delta.InMicroseconds());
- }
- Time operator-(const TimeDelta& delta) const {
- return Time(us_ - delta.InMicroseconds());
- }
-
- // Comparison operators
- bool operator==(const Time& other) const {
- return us_ == other.us_;
- }
- bool operator!=(const Time& other) const {
- return us_ != other.us_;
- }
- bool operator<(const Time& other) const {
- return us_ < other.us_;
- }
- bool operator<=(const Time& other) const {
- return us_ <= other.us_;
- }
- bool operator>(const Time& other) const {
- return us_ > other.us_;
- }
- bool operator>=(const Time& other) const {
- return us_ >= other.us_;
- }
-
- private:
- explicit Time(int64_t us) : us_(us) {}
-
- // Time in microseconds in UTC.
- int64_t us_;
-};
-
-inline Time operator+(const TimeDelta& delta, const Time& time) {
- return time + delta;
-}
-
-
-// -----------------------------------------------------------------------------
-// TimeTicks
-//
-// This class represents an abstract time that is most of the time incrementing
-// for use in measuring time durations. It is internally represented in
-// microseconds. It can not be converted to a human-readable time, but is
-// guaranteed not to decrease (if the user changes the computer clock,
-// Time::Now() may actually decrease or jump). But note that TimeTicks may
-// "stand still", for example if the computer suspended.
-
-class TimeTicks V8_FINAL BASE_EMBEDDED {
- public:
- TimeTicks() : ticks_(0) {}
-
- // Platform-dependent tick count representing "right now."
- // The resolution of this clock is ~1-15ms. Resolution varies depending
- // on hardware/operating system configuration.
- // This method never returns a null TimeTicks.
- static TimeTicks Now();
-
- // Returns a platform-dependent high-resolution tick count. Implementation
- // is hardware dependent and may or may not return sub-millisecond
- // resolution. THIS CALL IS GENERALLY MUCH MORE EXPENSIVE THAN Now() AND
- // SHOULD ONLY BE USED WHEN IT IS REALLY NEEDED.
- // This method never returns a null TimeTicks.
- static TimeTicks HighResNow();
-
- // Returns true if this object has not been initialized.
- bool IsNull() const { return ticks_ == 0; }
-
- TimeTicks& operator=(const TimeTicks other) {
- ticks_ = other.ticks_;
- return *this;
- }
-
- // Compute the difference between two times.
- TimeDelta operator-(const TimeTicks other) const {
- return TimeDelta::FromMicroseconds(ticks_ - other.ticks_);
- }
-
- // Modify by some time delta.
- TimeTicks& operator+=(const TimeDelta& delta) {
- ticks_ += delta.InMicroseconds();
- return *this;
- }
- TimeTicks& operator-=(const TimeDelta& delta) {
- ticks_ -= delta.InMicroseconds();
- return *this;
- }
-
- // Return a new TimeTicks modified by some delta.
- TimeTicks operator+(const TimeDelta& delta) const {
- return TimeTicks(ticks_ + delta.InMicroseconds());
- }
- TimeTicks operator-(const TimeDelta& delta) const {
- return TimeTicks(ticks_ - delta.InMicroseconds());
- }
-
- // Comparison operators
- bool operator==(const TimeTicks& other) const {
- return ticks_ == other.ticks_;
- }
- bool operator!=(const TimeTicks& other) const {
- return ticks_ != other.ticks_;
- }
- bool operator<(const TimeTicks& other) const {
- return ticks_ < other.ticks_;
- }
- bool operator<=(const TimeTicks& other) const {
- return ticks_ <= other.ticks_;
- }
- bool operator>(const TimeTicks& other) const {
- return ticks_ > other.ticks_;
- }
- bool operator>=(const TimeTicks& other) const {
- return ticks_ >= other.ticks_;
- }
-
- private:
- // Please use Now() to create a new object. This is for internal use
- // and testing. Ticks is in microseconds.
- explicit TimeTicks(int64_t ticks) : ticks_(ticks) {}
-
- // Tick count in microseconds.
- int64_t ticks_;
-};
-
-inline TimeTicks operator+(const TimeDelta& delta, const TimeTicks& ticks) {
- return ticks + delta;
-}
-
-} } // namespace v8::internal
-
-#endif // V8_PLATFORM_TIME_H_
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