X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FTimeValue.h;h=6bca58b6bc2085e376e6952740680ea889ca5a5d;hb=5c542537c1330e18cce3744b519849e2c0c11fff;hp=e1227118c22cafc40c28aa37e16cc51779764482;hpb=1f6efa3996dd1929fbc129203ce5009b620e6969;p=oota-llvm.git diff --git a/include/llvm/Support/TimeValue.h b/include/llvm/Support/TimeValue.h index e1227118c22..6bca58b6bc2 100644 --- a/include/llvm/Support/TimeValue.h +++ b/include/llvm/Support/TimeValue.h @@ -11,12 +11,12 @@ // //===----------------------------------------------------------------------===// +#ifndef LLVM_SUPPORT_TIMEVALUE_H +#define LLVM_SUPPORT_TIMEVALUE_H + #include "llvm/Support/DataTypes.h" #include -#ifndef LLVM_SYSTEM_TIMEVALUE_H -#define LLVM_SYSTEM_TIMEVALUE_H - namespace llvm { namespace sys { /// This class is used where a precise fixed point in time is required. The @@ -35,31 +35,41 @@ namespace sys { public: /// A constant TimeValue representing the smallest time - /// value permissable by the class. MinTime is some point + /// value permissible by the class. MinTime is some point /// in the distant past, about 300 billion years BCE. /// @brief The smallest possible time value. - static const TimeValue MinTime; + static TimeValue MinTime() { + return TimeValue ( INT64_MIN,0 ); + } /// A constant TimeValue representing the largest time - /// value permissable by the class. MaxTime is some point + /// value permissible by the class. MaxTime is some point /// in the distant future, about 300 billion years AD. /// @brief The largest possible time value. - static const TimeValue MaxTime; + static TimeValue MaxTime() { + return TimeValue ( INT64_MAX,0 ); + } /// A constant TimeValue representing the base time, /// or zero time of 00:00:00 (midnight) January 1st, 2000. /// @brief 00:00:00 Jan 1, 2000 UTC. - static const TimeValue ZeroTime; + static TimeValue ZeroTime() { + return TimeValue ( 0,0 ); + } /// A constant TimeValue for the Posix base time which is /// 00:00:00 (midnight) January 1st, 1970. /// @brief 00:00:00 Jan 1, 1970 UTC. - static const TimeValue PosixZeroTime; + static TimeValue PosixZeroTime() { + return TimeValue ( PosixZeroTimeSeconds,0 ); + } /// A constant TimeValue for the Win32 base time which is /// 00:00:00 (midnight) January 1st, 1601. /// @brief 00:00:00 Jan 1, 1601 UTC. - static const TimeValue Win32ZeroTime; + static TimeValue Win32ZeroTime() { + return TimeValue ( Win32ZeroTimeSeconds,0 ); + } /// @} /// @name Types @@ -74,14 +84,16 @@ namespace sys { MILLISECONDS_PER_SECOND = 1000, ///< One Thousand NANOSECONDS_PER_MICROSECOND = 1000, ///< One Thousand NANOSECONDS_PER_MILLISECOND = 1000000,///< One Million - NANOSECONDS_PER_POSIX_TICK = 100, ///< Posix tick is 100 Hz (10ms) - NANOSECONDS_PER_WIN32_TICK = 100 ///< Win32 tick is 100 Hz (10ms) + NANOSECONDS_PER_WIN32_TICK = 100 ///< Win32 tick is 10^7 Hz (10ns) }; /// @} /// @name Constructors /// @{ public: + /// \brief Default construct a time value, initializing to ZeroTime. + TimeValue() : seconds_(0), nanos_(0) {} + /// Caller provides the exact value in seconds and nanoseconds. The /// \p nanos argument defaults to zero for convenience. /// @brief Explicit constructor @@ -153,7 +165,6 @@ namespace sys { /// Determine if \p this is greater than or equal to \p that. /// @returns True iff *this >= that. - /// @brief True if this >= that. int operator >= (const TimeValue &that) const { if ( this->seconds_ > that.seconds_ ) { return 1; @@ -164,8 +175,7 @@ namespace sys { } /// Determines if two TimeValue objects represent the same moment in time. - /// @brief True iff *this == that. - /// @brief True if this == that. + /// @returns True iff *this == that. int operator == (const TimeValue &that) const { return (this->seconds_ == that.seconds_) && (this->nanos_ == that.nanos_); @@ -173,8 +183,7 @@ namespace sys { /// Determines if two TimeValue objects represent times that are not the /// same. - /// @return True iff *this != that. - /// @brief True if this != that. + /// @returns True iff *this != that. int operator != (const TimeValue &that) const { return !(*this == that); } /// Adds two TimeValue objects together. @@ -236,26 +245,18 @@ namespace sys { ( nanos_ / NANOSECONDS_PER_MILLISECOND ); } - /// Converts the TimeValue into the corresponding number of "ticks" for - /// Posix, correcting for the difference in Posix zero time. - /// @brief Convert to unix time (100 nanoseconds since 12:00:00a Jan 1,1970) - uint64_t toPosixTime() const { - uint64_t result = seconds_ - PosixZeroTime.seconds_; - result += nanos_ / NANOSECONDS_PER_POSIX_TICK; - return result; - } - /// Converts the TimeValue into the corresponding number of seconds /// since the epoch (00:00:00 Jan 1,1970). uint64_t toEpochTime() const { - return seconds_ - PosixZeroTime.seconds_; + return seconds_ - PosixZeroTimeSeconds; } /// Converts the TimeValue into the corresponding number of "ticks" for /// Win32 platforms, correcting for the difference in Win32 zero time. - /// @brief Convert to windows time (seconds since 12:00:00a Jan 1, 1601) + /// @brief Convert to Win32's FILETIME + /// (100ns intervals since 00:00:00 Jan 1, 1601 UTC) uint64_t toWin32Time() const { - uint64_t result = seconds_ - Win32ZeroTime.seconds_; + uint64_t result = (uint64_t)10000000 * (seconds_ - Win32ZeroTimeSeconds); result += nanos_ / NANOSECONDS_PER_WIN32_TICK; return result; } @@ -264,7 +265,7 @@ namespace sys { /// correction for the Posix zero time. /// @brief Convert to timespec time (ala POSIX.1b) void getTimespecTime( uint64_t& seconds, uint32_t& nanos ) const { - seconds = seconds_ - PosixZeroTime.seconds_; + seconds = seconds_ - PosixZeroTimeSeconds; nanos = nanos_; } @@ -331,7 +332,7 @@ namespace sys { /// TimeValue and assigns that value to \p this. /// @brief Convert seconds form PosixTime to TimeValue void fromEpochTime( SecondsType seconds ) { - seconds_ = seconds + PosixZeroTime.seconds_; + seconds_ = seconds + PosixZeroTimeSeconds; nanos_ = 0; this->normalize(); } @@ -340,7 +341,7 @@ namespace sys { /// corresponding TimeValue and assigns that value to \p this. /// @brief Convert seconds form Windows FILETIME to TimeValue void fromWin32Time( uint64_t win32Time ) { - this->seconds_ = win32Time / 10000000 + Win32ZeroTime.seconds_; + this->seconds_ = win32Time / 10000000 + Win32ZeroTimeSeconds; this->nanos_ = NanoSecondsType(win32Time % 10000000) * 100; } @@ -360,6 +361,9 @@ namespace sys { /// Store the values as a . SecondsType seconds_;///< Stores the seconds part of the TimeVal NanoSecondsType nanos_; ///< Stores the nanoseconds part of the TimeVal + + static const SecondsType PosixZeroTimeSeconds; + static const SecondsType Win32ZeroTimeSeconds; /// @} };