[PATCH v2 1/3] ntdll/tests: Test updating TickCount in user_shared_data.

[Rémi Bernon]

Original patch from: Andrew Wesie

Signed-off-by: Rémi Bernon 
---

v2: This should fix a race condition with the previous version where
    the service could quit and detach USD view from other services
    although they would still be using it.

This version now relies on both the processes and the service open
    predetermined named sections and each map it into its address space.

The service can now start late or exit early without impacting the
    processes. It can now also catch up with previously started services
    and have the timestamp updates working for them as well.

dlls/ntdll/tests/time.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/dlls/ntdll/tests/time.c b/dlls/ntdll/tests/time.c
index 5382a952d8d..6ce56f39fd8 100644
--- a/dlls/ntdll/tests/time.c
+++ b/dlls/ntdll/tests/time.c
@@ -18,7 +18,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */

+#define NONAMELESSUNION
 #include "ntdll_test.h"
+#include "ddk/wdm.h"

#define TICKSPERSEC        10000000
 #define TICKSPERMSEC       10000
@@ -29,6 +31,7 @@ static VOID (WINAPI *pRtlTimeFieldsToTime)(  PTIME_FIELDS TimeFields,  PLARGE_IN
 static NTSTATUS (WINAPI *pNtQueryPerformanceCounter)( LARGE_INTEGER *counter, LARGE_INTEGER *frequency );
 static NTSTATUS (WINAPI *pRtlQueryTimeZoneInformation)( RTL_TIME_ZONE_INFORMATION *);
 static NTSTATUS (WINAPI *pRtlQueryDynamicTimeZoneInformation)( RTL_DYNAMIC_TIME_ZONE_INFORMATION *);
+static ULONG (WINAPI *pNtGetTickCount)(void);

static const int MonthLengths[2][12] =
 {
@@ -153,12 +156,35 @@ static void test_RtlQueryTimeZoneInformation(void)
        wine_dbgstr_w(tzinfo.DaylightName));
 }

+static void test_NtGetTickCount(void)
+{
+    KSHARED_USER_DATA *user_shared_data = (void *)0x7ffe0000;
+    ULONG diff;
+    int i;
+
+    if (!pNtGetTickCount)
+    {
+        win_skip("NtGetTickCount is not available\n");
+        return;
+    }
+
+    for (i = 0; i < 5; ++i)
+    {
+        diff = (user_shared_data->u.TickCountQuad * user_shared_data->TickCountMultiplier) >> 24;
+        diff = pNtGetTickCount() - diff;
+        todo_wine
+        ok(diff < 100, "NtGetTickCount - TickCountQuad too high, expected < 100 got %d\n", diff);
+        Sleep(50);
+    }
+}
+
 START_TEST(time)
 {
     HMODULE mod = GetModuleHandleA("ntdll.dll");
     pRtlTimeToTimeFields = (void *)GetProcAddress(mod,"RtlTimeToTimeFields");
     pRtlTimeFieldsToTime = (void *)GetProcAddress(mod,"RtlTimeFieldsToTime");
     pNtQueryPerformanceCounter = (void *)GetProcAddress(mod, "NtQueryPerformanceCounter");
+    pNtGetTickCount = (void *)GetProcAddress(mod,"NtGetTickCount");
     pRtlQueryTimeZoneInformation =
         (void *)GetProcAddress(mod, "RtlQueryTimeZoneInformation");
     pRtlQueryDynamicTimeZoneInformation =
@@ -169,5 +195,6 @@ START_TEST(time)
     else
         win_skip("Required time conversion functions are not available\n");
     test_NtQueryPerformanceCounter();
+    test_NtGetTickCount();
     test_RtlQueryTimeZoneInformation();
 }