support gmd. change work_dir. hourglass. add utilies.

trunk/src/app/srs_app_config.hpp

@@ -416,6 +416,11 @@ public:
      * parse the cli, the main(argc,argv) function.
      */
     virtual int parse_options(int argc, char** argv);
+    /**
+     * initialize the cwd for server,
+     * because we may change the workdir.
+     */
+    virtual int initialize_cwd();
     /**
      * persistence current config to file.
      */
@@ -607,6 +612,11 @@ public:
      * whether use utc-time to format the time.
      */
     virtual bool                get_utc_time();
+    /**
+     * get the configed work dir.
+     * ignore if empty string.
+     */
+    virtual std::string         get_work_dir();
 // stream_caster section
 public:
     /**