TscTimePoint

A time point maintained through the TSC timer

TSC is a time counter maintained directly by the CPU. It counts how many "cycles" (loosly corresponding to actual CPU cycles) since an arbitrary start point. It is read by a single assembly instruciton, and is more efficient to read than kernel operatons.

struct TscTimePoint {

enum min;

enum zero;

enum max;

static shared immutable

long cyclesPerSecond;

static shared immutable

long cyclesPerMsec;

static shared immutable

long cyclesPerUsec;

alias frequency = cyclesPerSecond;

static shared immutable

S64Divisor cyclesPerSecondDivisor;

static shared immutable

S64Divisor cyclesPerMsecDivisor;

static shared immutable

S64Divisor cyclesPerUsecDivisor;

long cycles;

static TscTimePoint now();

static TscTimePoint hardNow();

static void setHardNowThreshold(ubyte interval);

static auto fromNow(Duration dur);

static auto fromSysTime(SysTime time);

static long toCycles(Duration dur);

static long toCycles(long n);

static Duration toDuration(long cycles);

Duration toDuration();

static long toUsecs(long cycles);

long toUsecs();

static long toMsecs(long cycles);

long toMsecs();

int opCmp(TscTimePoint rhs);

bool opEquals(TscTimePoint rhs);

TscTimePoint opBinary(long cycles);

TscTimePoint opBinary(Duration dur);

TscTimePoint opBinary(long cycles);

Duration opBinary(TscTimePoint rhs);

TscTimePoint opBinary(Duration dur);

auto ref opOpAssign(Duration dur);

auto ref opOpAssign(long cycles);

long diff(TscTimePoint rhs);

long to();

}

Members

Aliases

frequency alias frequency = cyclesPerSecond: Undocumented in source.

Functions

diff long diff(TscTimePoint rhs): Calculate difference between two TscTimePoint in the given units
opBinary TscTimePoint opBinary(long cycles): Undocumented in source. Be warned that the author may not have intended to support it.
opBinary TscTimePoint opBinary(Duration dur): Undocumented in source. Be warned that the author may not have intended to support it.
opBinary TscTimePoint opBinary(long cycles): Undocumented in source. Be warned that the author may not have intended to support it.
opBinary Duration opBinary(TscTimePoint rhs): Undocumented in source. Be warned that the author may not have intended to support it.
opBinary TscTimePoint opBinary(Duration dur): Undocumented in source. Be warned that the author may not have intended to support it.
opCmp int opCmp(TscTimePoint rhs): Undocumented in source. Be warned that the author may not have intended to support it.
opEquals bool opEquals(TscTimePoint rhs): Undocumented in source. Be warned that the author may not have intended to support it.
opOpAssign auto ref opOpAssign(Duration dur): Undocumented in source. Be warned that the author may not have intended to support it.
opOpAssign auto ref opOpAssign(long cycles): Undocumented in source. Be warned that the author may not have intended to support it.
to long to(): Convert to any of the units accepted by toDuration
toDuration Duration toDuration()
toMsecs long toMsecs()
toUsecs long toUsecs(): Various conversion functions

Manifest constants

max enum max;: Minimal, maximal and zero constants for reference.
min enum min;
zero enum zero;: Minimal, maximal and zero constants for reference.

Static functions

fromNow auto fromNow(Duration dur): Calculate a TscTimePoint for a set duration from now
fromSysTime auto fromSysTime(SysTime time): Calculate a TscTimePoint for a time given in systime from now
hardNow TscTimePoint hardNow(): Get a TscTimePoint representing now.
now TscTimePoint now(): Get a TscTimePoint representing now.
setHardNowThreshold void setHardNowThreshold(ubyte interval): Set the frequency with which we take a hard TSC reading
toCycles long toCycles(Duration dur)
long toCycles(long n)
toDuration Duration toDuration(long cycles)
toMsecs long toMsecs(long cycles)
toUsecs long toUsecs(long cycles): Various conversion functions

Static variables

cyclesPerMsec long cyclesPerMsec;: Provide the cycles/time ratio for the current machine.
cyclesPerMsecDivisor S64Divisor cyclesPerMsecDivisor;: Prepared dividor for the cycles/time value
cyclesPerSecond long cyclesPerSecond;: Provide the cycles/time ratio for the current machine.
cyclesPerSecondDivisor S64Divisor cyclesPerSecondDivisor;: Prepared dividor for the cycles/time value
cyclesPerUsec long cyclesPerUsec;: Provide the cycles/time ratio for the current machine.
cyclesPerUsecDivisor S64Divisor cyclesPerUsecDivisor;: Prepared dividor for the cycles/time value

Variables

cycles long cycles;: Time represented by TscTimePoint in units of cycles.

TscTimePoint

Members

Aliases

Functions

Manifest constants

Static functions

Static variables

Variables

Meta

Source