Changeset 6728 for trunk/src

Timestamp:

Sep 16, 2001, 9:27:25 PM (24 years ago)

Author:

phaller

Message:

Added support for new kernels with better timer granularity

Location:

trunk/src/winmm

Files:

• os2timer.h (modified) (2 diffs)
• time.cpp (modified) (2 diffs)

trunk/src/winmm/os2timer.h

@@ -1 @@
-/* $Id: os2timer.h,v 1.9 2000-05-24 01:56:25 phaller Exp $ */
+/* $Id: os2timer.h,v 1.10 2001-09-16 19:27:24 phaller Exp $ */
 
 #ifndef __OS2TIMER_H__
@@ -23 +23 @@
  ****************************************************************************/
 
-#define OS2TIMER_RESOLUTION_MINIMUM 32
+ /* 2001-09-16 PH
+  with the new OS2KRNL's dating 2001-09-14 and later, there is
+  a special CLOCKSCALE feature added which allows for much finer
+  granularity of the OS/2 system timers up to a maximum resolution
+  of 2ms. This is supposed to be enough for most timing issues here.
+  
+  Note:
+  we need to add support for dynamic detection of this feature.
+  */
+#define OS2TIMER_RESOLUTION_MINIMUM 2
 #define OS2TIMER_RESOLUTION_MAXIMUM 0x7ffffffe
 

trunk/src/winmm/time.cpp

@@ -1 @@
-/* $Id: time.cpp,v 1.12 2001-07-30 10:19:54 sandervl Exp $ */
+/* $Id: time.cpp,v 1.13 2001-09-16 19:27:25 phaller Exp $ */
 
 /*
@@ -64 +64 @@
 {
   dprintf(("WINMM:timeGetDevCaps Not really Implemented\n"));
-
+  
+  /* 2001-09-16 PH
+   add dynamic detection of OS/2's minimum timer resolution
+   */
+  
   ptc->wPeriodMin = OS2TIMER_RESOLUTION_MINIMUM;
   ptc->wPeriodMax = OS2TIMER_RESOLUTION_MAXIMUM;