From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Wed, 17 Nov 2004 16:36:07 +0000 (+0000)
Subject: minimize cpu use when framerate limited
X-Git-Tag: xonotic-v0.1.0preview~5366
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=523bb9eeb2126f8026b3427c3d03ef2819825638;p=xonotic%2Fdarkplaces.git

minimize cpu use when framerate limited


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@4769 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/host.c b/host.c
index 94d097f8..953f3943 100644
--- a/host.c
+++ b/host.c
@@ -597,12 +597,21 @@ qboolean Host_FilterTime (double time)
 	timeleft = (oldrealtime - realtime) + timecap;
 	if (timeleft > 0)
 	{
+		int msleft;
 		// don't totally hog the CPU
-		int msleft = (int)(timeleft * 1000);
-		// if not dedicated, try to hit exactly a steady framerate by by not
-		// sleeping the full amount
-		if (cls.state != ca_dedicated)
-			msleft -= 1;
+		if (cls.state == ca_dedicated)
+		{
+			// if dedicated, try to use as little cpu as possible by waiting
+			// just a little longer than necessary
+			// (yes this means it doesn't quite keep up with the framerate)
+			msleft = (int)ceil(timeleft * 1000);
+		}
+		else
+		{
+			// if not dedicated, try to hit exactly a steady framerate by not
+			// sleeping the full amount
+			msleft = (int)floor(timeleft * 1000);
+		}
 		if (msleft > 0)
 			Sys_Sleep(msleft);
 		return false;