[frontierkernel-commits] Frontier/Common/source timedate.c,1.9,1.10

[Seth D. <set...@us...>]

Update of /cvsroot/frontierkernel/Frontier/Common/source
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv31421/source

Modified Files:
	timedate.c 
Log Message:
Performance tweak. getmilliseconds() now stores the performance frequency in a global, and only sets it if the value is 0. QueryPerformanceFrequency always returns the same result (on a given machine), there is no point to calling it every time we need the milliseconds.

Index: timedate.c
===================================================================
RCS file: /cvsroot/frontierkernel/Frontier/Common/source/timedate.c,v
retrieving revision 1.9
retrieving revision 1.10
diff -C2 -d -r1.9 -r1.10
*** timedate.c	15 Jan 2005 20:39:21 -0000	1.9
--- timedate.c	16 Jan 2005 00:30:19 -0000	1.10
***************
*** 122,125 ****
--- 122,127 ----
  	static tyinternationalinfo globalII;
  	static tyinternationalinfoptr globalIIptr = NULL;
+ 	
+ 	static LONGLONG gPerformanceFreq = 0;  /* for getmilliseconds() */
  #endif
  
***************
*** 1554,1567 ****
  
  extern long getmilliseconds(void) {
! 	LARGE_INTEGER counter, freq;
! 	LONGLONG freqLong;
  	
  	QueryPerformanceCounter (&counter);  /* counter hits since boot-up */
  	
! 	QueryPerformanceFrequency (&freq);   /* frequency of coutner hits (per second) */
! 	
! 	freqLong = ( freq.LowPart | ( freq.HighPart << 32 ) ) / 1000; /* per millisecond */
  	
! 	return ((long) ((counter.LowPart | (counter.HighPart << 32)) / freqLong));
  } /* getmilliseconds */
  
--- 1556,1570 ----
  
  extern long getmilliseconds(void) {
! 	LARGE_INTEGER counter;
  	
  	QueryPerformanceCounter (&counter);  /* counter hits since boot-up */
  	
! 	if (gPerformanceFreq == 0) {
! 		LARGE_INTEGER freq;
! 		QueryPerformanceFrequency (&freq);   /* frequency of coutner hits (per second) */
! 		gPerformanceFreq = freq.QuadPart / 1000;
! 	}
  	
! 	return ((long) (counter.QuadPart / gPerformanceFreq));
  } /* getmilliseconds */