[fireball] 30620: - Remove stupid and greatly broken "let's wait in a loop, while querying current time" by calls to KeDelayExecutionThread().

Author: fireball
Date: Wed Nov 21 14:18:15 2007
New Revision: 30620

URL: http://svn.reactos.org/svn/reactos?rev=30620&view=rev
Log:
- Remove stupid and greatly broken "let's wait in a loop, while querying current
time" by calls to KeDelayExecutionThread().

Modified:
    trunk/reactos/drivers/usb/nt4compat/usbdriver/usb.c

Modified: trunk/reactos/drivers/usb/nt4compat/usbdriver/usb.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/usb/nt4compat/usbd…
==============================================================================
--- trunk/reactos/drivers/usb/nt4compat/usbdriver/usb.c (original)
+++ trunk/reactos/drivers/usb/nt4compat/usbdriver/usb.c Wed Nov 21 14:18:15 2007
@@ -1014,80 +1014,24 @@
 VOID
 usb_wait_ms_dpc(ULONG ms)
 {
-    LARGE_INTEGER start;
-    LARGE_INTEGER ticker;
-    LARGE_INTEGER freq;
-    ULONG interval;
-    ULONG expire_count;
-
-    KeQueryPerformanceCounter(&freq);
-
-    expire_count = 2000000;
-    if (cpu_clock_freq)
-        expire_count = (cpu_clock_freq / 1000) * ms;
-
-    if (usb_query_clicks(&start) == FALSE)
-    {
-        ticker.QuadPart = 0;
-        while (TRUE)
-        {
-            KeQuerySystemTime(&ticker);
-            interval = ticker.LowPart - start.LowPart;
-            if (interval >= ms * 10000)
-                break;
-        }
-    }
-    else
-    {
-        ticker.QuadPart = 0;
-        while (TRUE)
-        {
-            usb_query_clicks(&ticker);
-            interval = ticker.LowPart - start.LowPart;
-            if (interval >= expire_count)
-                break;
-        }
-    }
+    LARGE_INTEGER Interval;
+    if (ms <= 0)
+        return;
+
+    Interval.QuadPart = -ms * 10000;
+    KeDelayExecutionThread(KernelMode, FALSE, &Interval);
 }
 
 
 VOID
 usb_wait_us_dpc(ULONG us)
 {
-    LARGE_INTEGER start;
-    LARGE_INTEGER ticker;
-    LARGE_INTEGER freq;
-    ULONG interval;
-    ULONG expire_count;
-
-    KeQueryPerformanceCounter(&freq);
-
-    expire_count = 2000000;
-    if (cpu_clock_freq)
-        expire_count = (cpu_clock_freq / 1000000) * us;
-
-    if (usb_query_clicks(&start) == FALSE)
-    {
-        ticker.QuadPart = 0;
-        while (TRUE)
-        {
-            KeQuerySystemTime(&ticker);
-            interval = ticker.LowPart - start.LowPart;
-            if (interval >= us * 10)
-                break;
-        }
-    }
-    else
-    {
-        ticker.QuadPart = 0;
-        while (TRUE)
-        {
-            usb_query_clicks(&ticker);
-            interval = ticker.LowPart - start.LowPart;
-            if (interval >= expire_count)
-                break;
-        }
-    }
+    LARGE_INTEGER Interval;
+    if (us <= 0)
+        return;
+
+    Interval.QuadPart = -us;
+    KeDelayExecutionThread(KernelMode, FALSE, &Interval);
 }
 
 VOID