X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fmisc.c;h=657bc164f495b6f61e09fcbfcf9e4d6d53e6d99d;hb=4b0c6356359ee52f98cee8fa578179c6c41d4ef1;hp=b9127322837f809331da5a9450fa59356d47e5af;hpb=b7d31643c9c84104fb3ebef778e545928610ff65;p=rocksndiamonds.git

diff --git a/src/misc.c b/src/misc.c
index b9127322..657bc164 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -26,14 +26,31 @@
 
 void microsleep(unsigned long usec)
 {
-  struct timeval delay;
+  if (usec < 5000)
+  {
+    /* we want to wait less than 5 ms -- if we assume that we have a
+       kernel timer resolution of 10 ms, we would wait far to long;
+       therefore it's better to do a short interval of busy waiting
+       to get our sleeping time more accurate */
 
-  delay.tv_sec  = usec / 1000000;
-  delay.tv_usec = usec % 1000000;
+    long base_counter = Counter2(), actual_counter = Counter2();
+    long delay = usec/1000;
 
-  if (select(0,NULL,NULL,NULL,&delay)!=0)
-    fprintf(stderr,"%s: in function microsleep: select failed!\n",
-	    progname);
+    while (actual_counter < base_counter+delay &&
+	   actual_counter >= base_counter)
+      actual_counter = Counter2();
+  }
+  else
+  {
+    struct timeval delay;
+
+    delay.tv_sec  = usec / 1000000;
+    delay.tv_usec = usec % 1000000;
+
+    if (select(0,NULL,NULL,NULL,&delay) != 0)
+      fprintf(stderr,"%s: in function microsleep: select failed!\n",
+	      progname);
+  }
 }
 
 long mainCounter(int mode)
@@ -167,3 +184,16 @@ char *GetLoginName()
   else
     return(pwd->pw_name);
 }
+
+void MarkTileDirty(int x, int y)
+{
+  int xx = redraw_x1 + x;
+  int yy = redraw_y1 + y;
+
+  if (!redraw[xx][yy])
+  {
+    redraw[xx][yy] = TRUE;
+    redraw_tiles++;
+    redraw_mask |= REDRAW_TILES;
+  }
+}