[Mingw-w64-public] [PATCH 6/9] winpthreads: tests: Use QPC instead of getntptimeofday

[Antonin Décimo]

getntptimeofday is specific to mingw. QueryPerformanceCounter is always 
available.
https://learn.microsoft.com/en-us/windows/win32/sysinfo/acquiring-high-resolution-time-stamps\#using-qpc-in-native-code

Signed-off-by: Antonin Décimo <anto...@tarides.com>
---
 .../winpthreads/tests/t_nanosleep.c           | 29 ++++++++-----------
 1 file changed, 12 insertions(+), 17 deletions(-)

diff --git a/mingw-w64-libraries/winpthreads/tests/t_nanosleep.c 
b/mingw-w64-libraries/winpthreads/tests/t_nanosleep.c
index b3346c4b9..4e17668ca 100644
--- a/mingw-w64-libraries/winpthreads/tests/t_nanosleep.c
+++ b/mingw-w64-libraries/winpthreads/tests/t_nanosleep.c
@@ -5,17 +5,6 @@
 #include <pthread_time.h>
 #include <windows.h>
 
-#define POW10_3                 1000
-#define POW10_6                 1000000
-
-extern int __cdecl getntptimeofday(struct timespec *tp, struct timezone *tz);
-
-static __int64 timespec_diff_as_ms(struct timespec *__old, struct timespec 
*__new)
-{
-    return (__new->tv_sec - __old->tv_sec) * POW10_3
-         + (__new->tv_nsec - __old->tv_nsec) / POW10_6;
-}
-
 static unsigned __stdcall start_address(void *dummy)
 {
     int counter = 0;
@@ -73,19 +62,25 @@ static void test_apc(void)
 int main(void)
 {
     int rc;
-    struct timespec tp, tp2, request = { 1, 0 }, remain;
+    struct timespec request = { 1, 0 }, remain;
+    LARGE_INTEGER StartingTime, EndingTime, ElapsedMicroseconds;
+    LARGE_INTEGER Frequency;
+
+    QueryPerformanceFrequency(&Frequency);
+    QueryPerformanceCounter(&StartingTime);
 
-    getntptimeofday(&tp, NULL);
     rc = nanosleep(&request, &remain);
-    getntptimeofday(&tp2, NULL);
+
+    QueryPerformanceCounter(&EndingTime);
+    ElapsedMicroseconds.QuadPart = EndingTime.QuadPart - StartingTime.QuadPart;
 
     if (rc != 0) {
         printf("remain: %d.%09d\n", (int) remain.tv_sec, (int) remain.tv_nsec);
     }
 
-    printf("%d.%09d\n", (int) tp.tv_sec, (int) tp.tv_nsec);
-    printf("%d.%09d\n", (int) tp2.tv_sec, (int) tp2.tv_nsec);
-    printf("sleep %d ms\n\n", (int) timespec_diff_as_ms(&tp, &tp2));
+    ElapsedMicroseconds.QuadPart *= 1000000;
+    ElapsedMicroseconds.QuadPart /= Frequency.QuadPart;
+    printf("sleep %d ms\n\n", (int) ElapsedMicroseconds.QuadPart);
 
     test_apc();
 
-- 
2.43.0



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