- add get_max_rate timing API call

- change ast_settimeout() to honor max rate in edge cases of file playback
  (this will make some warning messages go away at the end of playing back
   a file)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@125332 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/timing.h

@@ -72,6 +72,7 @@ struct ast_timing_functions {
 	int (*timer_enable_continuous)(int handle);
 	int (*timer_disable_continuous)(int handle);
 	enum ast_timing_event (*timer_get_event)(int handle);
+	unsigned int (*timer_get_max_rate)(int handle);
 };
 
 /*!
@@ -175,6 +176,15 @@ int ast_timer_disable_continuous(int handle);
  */
 enum ast_timing_event ast_timer_get_event(int handle);
 
+/*!
+ * \brief Get maximum rate supported for a timing handle
+ *
+ * \arg handle timing fd returned by timer_open()
+ *
+ * \return maximum rate supported for timing handle
+ */
+unsigned int ast_timer_get_max_rate(int handle);
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }
 #endif