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#
#
# Nimrod's Runtime Library
# (c) Copyright 2012 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
## Timer support for the realtime GC. Based on
## `<https://github.com/jckarter/clay/blob/master/compiler/src/hirestimer.cpp>`_
type
TTicks = distinct int64
TNanos = int64
when defined(windows):
proc QueryPerformanceCounter(res: var TTicks) {.
importc: "QueryPerformanceCounter", stdcall, dynlib: "kernel32".}
proc QueryPerformanceFrequency(res: var int64) {.
importc: "QueryPerformanceFrequency", stdcall, dynlib: "kernel32".}
proc getTicks(): TTicks {.inline.} =
QueryPerformanceCounter(result)
proc `-`(a, b: TTicks): TNanos =
var frequency: int64
QueryPerformanceFrequency(frequency)
var performanceCounterRate = 1000000000.0 / toFloat(frequency.int)
result = ((a.int64 - b.int64).int.toFloat <
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