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add sleep-fallback and invariant check

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This commit is contained in:
Colin Davidson
2023-02-21 17:48:49 -08:00
parent 91dccf8d62
commit 8e5e43f335
4 changed files with 60 additions and 20 deletions
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core/time/tsc_windows.odin
+1 -18
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@@ -2,23 +2,6 @@
//+build windows
package time
import "core:intrinsics"
import win32 "core:sys/windows"
_get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
qpc_begin: win32.LARGE_INTEGER
win32.QueryPerformanceCounter(&qpc_begin)
tsc_begin := intrinsics.read_cycle_counter()
win32.Sleep(2)
qpc_end: win32.LARGE_INTEGER
win32.QueryPerformanceCounter(&qpc_end)
tsc_end := intrinsics.read_cycle_counter()
qpc_frequency: win32.LARGE_INTEGER
win32.QueryPerformanceFrequency(&qpc_frequency)
frequency = u64((u128(tsc_end - tsc_begin) * u128(qpc_frequency)) / u128(qpc_end - qpc_begin))
return frequency, true
return 0, false
}