Use zaptel timers to wake up processes

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1002 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/channel.h

@@ -112,6 +112,9 @@ struct ast_channel {
 	struct ast_filestream *stream;		
 	/*! Original writer format */
 	int oldwriteformat;			
+	
+	/*! Timing fd */
+	int timingfd;
 
 
 	/*! State of line -- Don't write directly, use ast_setstate */
@@ -669,6 +672,10 @@ int ast_autoservice_start(struct ast_channel *chan);
 /*! Stop servicing a channel for us...  Returns -1 on error or if channel has been hungup */
 int ast_autoservice_stop(struct ast_channel *chan);
 
+/* If built with zaptel optimizations, force a scheduled expiration on the
+   timer fd */
+int ast_settimeout(struct ast_channel *c, int ms);
+
 /* Misc. functions below */
 
 //! Waits for activity on a group of channels