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[NTVDM]

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Fix the VGA refresh rate.
Serialize access to the PS/2 keyboard queue.


svn path=/branches/ntvdm/; revision=61214
This commit is contained in:
Aleksandar Andrejevic 2013-12-04 00:38:52 +00:00
parent a2bd742ecd
commit 73186a64bd
2 changed files with 28 additions and 5 deletions
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2
subsystems/ntvdm/ntvdm.c
View file

@ -221,7 +221,7 @@ INT wmain(INT argc, WCHAR *argv[])
}
/* Check for vertical retrace */
if ((CurrentTickCount - LastVerticalRefresh) >= 16)
if ((CurrentTickCount - LastVerticalRefresh) >= 15)
{
VgaRefreshDisplay();
LastVerticalRefresh = CurrentTickCount;

31
subsystems/ntvdm/ps2.c
View file

@ -24,6 +24,7 @@ static UINT KeyboardQueueEnd = 0;
static BYTE KeyboardData = 0, KeyboardResponse = 0;
static BOOLEAN KeyboardReadResponse = FALSE, KeyboardWriteResponse = FALSE;
static BYTE KeyboardConfig = PS2_DEFAULT_CONFIG;
static HANDLE QueueMutex = NULL;
static HANDLE InputThread = NULL;
@ -31,10 +32,15 @@ static HANDLE InputThread = NULL;
static BOOLEAN KeyboardQueuePush(BYTE ScanCode)
{
BOOLEAN Result = TRUE;
WaitForSingleObject(QueueMutex, INFINITE);
/* Check if the keyboard queue is full */
if (!KeyboardQueueEmpty && (KeyboardQueueStart == KeyboardQueueEnd))
{
return FALSE;
Result = FALSE;
goto Done;
}
/* Insert the value in the queue */
@ -45,13 +51,23 @@ static BOOLEAN KeyboardQueuePush(BYTE ScanCode)
/* Since we inserted a value, it's not empty anymore */
KeyboardQueueEmpty = FALSE;
return TRUE;
Done:
ReleaseMutex(QueueMutex);
return Result;
}
static BOOLEAN KeyboardQueuePop(BYTE *ScanCode)
{
BOOLEAN Result = TRUE;
WaitForSingleObject(QueueMutex, INFINITE);
/* Make sure the keyboard queue is not empty */
if (KeyboardQueueEmpty) return FALSE;
if (KeyboardQueueEmpty)
{
Result = FALSE;
goto Done;
}
/* Get the scan code */
*ScanCode = KeyboardQueue[KeyboardQueueStart];
@ -66,7 +82,9 @@ static BOOLEAN KeyboardQueuePop(BYTE *ScanCode)
KeyboardQueueEmpty = TRUE;
}
return TRUE;
Done:
ReleaseMutex(QueueMutex);
return Result;
}
/* PUBLIC FUNCTIONS ***********************************************************/
@ -338,6 +356,9 @@ DWORD WINAPI InputThreadProc(LPVOID Parameter)
BOOLEAN PS2Initialize(HANDLE ConsoleInput)
{
/* Create the mutex */
QueueMutex = CreateMutex(NULL, FALSE, NULL);
/* Start the input thread */
InputThread = CreateThread(NULL, 0, &InputThreadProc, ConsoleInput, 0, NULL);
@ -355,6 +376,8 @@ VOID PS2Cleanup(VOID)
/* Close the input thread handle */
if (InputThread != NULL) CloseHandle(InputThread);
InputThread = NULL;
CloseHandle(QueueMutex);
}
/* EOF */