Revert "Fix inaccurate ticks in windows port (#142)" (#143)
This reverts commit d85fd461d9a17811f8d0d8fa11fcebf7fa542ee4.
diff --git a/portable/MSVC-MingW/port.c b/portable/MSVC-MingW/port.c
index 81b5f34..f5e26a9 100644
--- a/portable/MSVC-MingW/port.c
+++ b/portable/MSVC-MingW/port.c
@@ -22,6 +22,7 @@
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
+ * 1 tab == 4 spaces!
*/
/* Standard includes. */
@@ -139,9 +140,6 @@
{
TickType_t xMinimumWindowsBlockTime;
TIMECAPS xTimeCaps;
-TickType_t xWaitTimeBetweenTicks = portTICK_PERIOD_MS;
-HANDLE hTimer = NULL;
-LARGE_INTEGER liDueTime;
/* Set the timer resolution to the maximum possible. */
if( timeGetDevCaps( &xTimeCaps, sizeof( xTimeCaps ) ) == MMSYSERR_NOERROR )
@@ -161,32 +159,22 @@
/* Just to prevent compiler warnings. */
( void ) lpParameter;
- /* Tick time for the timer is adjusted with the maximum available
- resolution. */
- if( portTICK_PERIOD_MS < xMinimumWindowsBlockTime )
- {
- xWaitTimeBetweenTicks = xMinimumWindowsBlockTime;
- }
-
- /* Convert the tick time in milliseconds to nanoseconds resolution
- for the Waitable Timer. */
- liDueTime.u.LowPart = xWaitTimeBetweenTicks * 1000 * 1000;
- liDueTime.u.HighPart = 0;
-
- /* Create a synchronization Waitable Timer.*/
- hTimer = CreateWaitableTimer( NULL, FALSE, NULL );
-
- configASSERT( hTimer != NULL );
-
- /* Set the Waitable Timer. The timer is set to run periodically at every
- xWaitTimeBetweenTicks milliseconds. */
- configASSERT( SetWaitableTimer( hTimer, &liDueTime, xWaitTimeBetweenTicks, NULL, NULL, 0 ) );
-
for( ;; )
{
/* Wait until the timer expires and we can access the simulated interrupt
- variables. */
- WaitForSingleObject( hTimer, INFINITE );
+ variables. *NOTE* this is not a 'real time' way of generating tick
+ events as the next wake time should be relative to the previous wake
+ time, not the time that Sleep() is called. It is done this way to
+ prevent overruns in this very non real time simulated/emulated
+ environment. */
+ if( portTICK_PERIOD_MS < xMinimumWindowsBlockTime )
+ {
+ Sleep( xMinimumWindowsBlockTime );
+ }
+ else
+ {
+ Sleep( portTICK_PERIOD_MS );
+ }
configASSERT( xPortRunning );
