[PATCH] kernelbase/tests: Add test for Sleep(1). - wine-devel

9 Aug 2020

Sleep(1) does not sleep for a millisecond, but rather a kernel tick.
Thanks to Henri Verbeet for pointing this out.
Wine-bug: https://bugs.winehq.org/show_bug.cgi?id=49564
Signed-off-by: Myah Caron qsniyg@protonmail.com
---
I've tested it under Windows 10, but when testing shortly after the machine booted, it appears to sleep for ~1.6ms on average (rather than ~16ms). I'm not sure what is the reason, but my guess is that the kernel tick was possibly shorter when it booted?
dlls/kernelbase/tests/sync.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/dlls/kernelbase/tests/sync.c b/dlls/kernelbase/tests/sync.c
index 9f57cf7a95..f89e93261b 100644
--- a/dlls/kernelbase/tests/sync.c
+++ b/dlls/kernelbase/tests/sync.c
@@ -172,6 +172,31 @@ static void test_WaitOnAddress(void)
     ok(!address, "got unexpected value %s\n", wine_dbgstr_longlong(address));
 }
+static void test_Sleep(void)
+{
+    LARGE_INTEGER frequency;
+    LARGE_INTEGER t1, t2;
+    double elapsed_time;
+    BOOL ret;
+    int i;
+
+    ret = QueryPerformanceFrequency(&frequency);
+    ok(ret, "QueryPerformanceFrequency failed\n");
+
+    ret = QueryPerformanceCounter(&t1);
+    ok(ret, "QueryPerformanceCounter failed\n");
+
+    for (i = 0; i < 100; i++) {
+        Sleep(1);
+    }
+
+    ret = QueryPerformanceCounter(&t2);
+    ok(ret, "QueryPerformanceCounter failed\n");
+
+    elapsed_time = (t2.QuadPart - t1.QuadPart) / (double)frequency.QuadPart;
+    todo_wine ok(elapsed_time >= 1.5 && elapsed_time <= 2.1, "got %f\n", elapsed_time);
+}
+
 START_TEST(sync)
 {
     HMODULE hmod;
@@ -186,4 +211,5 @@ START_TEST(sync)
     pWakeByAddressSingle = (void *)GetProcAddress(hmod, "WakeByAddressSingle");
test_WaitOnAddress();
+    test_Sleep();
 }
--
2.27.0

    