diff options
Diffstat (limited to 'lib/pure/times.nim')
| -rw-r--r-- | lib/pure/times.nim | 99 |
1 files changed, 49 insertions, 50 deletions
diff --git a/lib/pure/times.nim b/lib/pure/times.nim index 9312b7ba8..ef9068cef 100644 --- a/lib/pure/times.nim +++ b/lib/pure/times.nim @@ -282,7 +282,7 @@ type dFri = "Friday" dSat = "Saturday" dSun = "Sunday" - + DateTimeLocale* = object MMM*: array[mJan..mDec, string] MMMM*: array[mJan..mDec, string] @@ -2484,56 +2484,55 @@ when not defined(JS): var clocksPerSec {.importc: "CLOCKS_PER_SEC", nodecl, used.}: int - when not defined(useNimRtl): - proc cpuTime*(): float {.rtl, extern: "nt$1", tags: [TimeEffect].} = - ## gets time spent that the CPU spent to run the current process in - ## seconds. This may be more useful for benchmarking than ``epochTime``. - ## However, it may measure the real time instead (depending on the OS). - ## The value of the result has no meaning. - ## To generate useful timing values, take the difference between - ## the results of two ``cpuTime`` calls: - runnableExamples: - var t0 = cpuTime() - # some useless work here (calculate fibonacci) - var fib = @[0, 1, 1] - for i in 1..10: - fib.add(fib[^1] + fib[^2]) - echo "CPU time [s] ", cpuTime() - t0 - echo "Fib is [s] ", fib - when defined(posix) and not defined(osx): - # 'clocksPerSec' is a compile-time constant, possibly a - # rather awful one, so use clock_gettime instead - var ts: Timespec - discard clock_gettime(cpuClockId, ts) - result = toFloat(ts.tv_sec.int) + - toFloat(ts.tv_nsec.int) / 1_000_000_000 - else: - result = toFloat(int(getClock())) / toFloat(clocksPerSec) + proc cpuTime*(): float {.tags: [TimeEffect].} = + ## gets time spent that the CPU spent to run the current process in + ## seconds. This may be more useful for benchmarking than ``epochTime``. + ## However, it may measure the real time instead (depending on the OS). + ## The value of the result has no meaning. + ## To generate useful timing values, take the difference between + ## the results of two ``cpuTime`` calls: + runnableExamples: + var t0 = cpuTime() + # some useless work here (calculate fibonacci) + var fib = @[0, 1, 1] + for i in 1..10: + fib.add(fib[^1] + fib[^2]) + echo "CPU time [s] ", cpuTime() - t0 + echo "Fib is [s] ", fib + when defined(posix) and not defined(osx): + # 'clocksPerSec' is a compile-time constant, possibly a + # rather awful one, so use clock_gettime instead + var ts: Timespec + discard clock_gettime(cpuClockId, ts) + result = toFloat(ts.tv_sec.int) + + toFloat(ts.tv_nsec.int) / 1_000_000_000 + else: + result = toFloat(int(getClock())) / toFloat(clocksPerSec) - proc epochTime*(): float {.rtl, extern: "nt$1", tags: [TimeEffect].} = - ## gets time after the UNIX epoch (1970) in seconds. It is a float - ## because sub-second resolution is likely to be supported (depending - ## on the hardware/OS). - ## - ## ``getTime`` should generally be prefered over this proc. - when defined(macosx): - var a: Timeval - gettimeofday(a) - result = toBiggestFloat(a.tv_sec.int64) + toFloat(a.tv_usec)*0.00_0001 - elif defined(posix): - var ts: Timespec - discard clock_gettime(realTimeClockId, ts) - result = toBiggestFloat(ts.tv_sec.int64) + - toBiggestFloat(ts.tv_nsec.int64) / 1_000_000_000 - elif defined(windows): - var f: winlean.FILETIME - getSystemTimeAsFileTime(f) - var i64 = rdFileTime(f) - epochDiff - var secs = i64 div rateDiff - var subsecs = i64 mod rateDiff - result = toFloat(int(secs)) + toFloat(int(subsecs)) * 0.0000001 - else: - {.error: "unknown OS".} + proc epochTime*(): float {.tags: [TimeEffect].} = + ## gets time after the UNIX epoch (1970) in seconds. It is a float + ## because sub-second resolution is likely to be supported (depending + ## on the hardware/OS). + ## + ## ``getTime`` should generally be prefered over this proc. + when defined(macosx): + var a: Timeval + gettimeofday(a) + result = toBiggestFloat(a.tv_sec.int64) + toFloat(a.tv_usec)*0.00_0001 + elif defined(posix): + var ts: Timespec + discard clock_gettime(realTimeClockId, ts) + result = toBiggestFloat(ts.tv_sec.int64) + + toBiggestFloat(ts.tv_nsec.int64) / 1_000_000_000 + elif defined(windows): + var f: winlean.FILETIME + getSystemTimeAsFileTime(f) + var i64 = rdFileTime(f) - epochDiff + var secs = i64 div rateDiff + var subsecs = i64 mod rateDiff + result = toFloat(int(secs)) + toFloat(int(subsecs)) * 0.0000001 + else: + {.error: "unknown OS".} when defined(JS): proc epochTime*(): float {.tags: [TimeEffect].} = |