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

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svn path=/trunk/; revision=30620
This commit is contained in:
Aleksey Bragin 2007-11-21 11:18:15 +00:00
parent ac0ce5049d
commit 776a248981
1 changed files with 10 additions and 66 deletions
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76
reactos/drivers/usb/nt4compat/usbdriver/usb.c
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@ -1014,80 +1014,24 @@ LBL_OUT:
VOID
usb_wait_ms_dpc(ULONG ms)
{
LARGE_INTEGER start;
LARGE_INTEGER ticker;
LARGE_INTEGER freq;
ULONG interval;
ULONG expire_count;
LARGE_INTEGER Interval;
if (ms <= 0)
return;
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;
}
}
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;
LARGE_INTEGER Interval;
if (us <= 0)
return;
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;
}
}
Interval.QuadPart = -us;
KeDelayExecutionThread(KernelMode, FALSE, &Interval);
}
VOID