add session counter and make all sessions hang up elegantly on shutdown

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1788 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_core.h

@@ -116,6 +116,13 @@ struct switch_core_runtime;
 */
 SWITCH_DECLARE(switch_status_t) switch_core_init(char *console, const char **err);
 
+/*! 
+  \brief Set/Get Session Limit
+  \param new new value (if > 0)
+  \return the current session limit
+*/
+SWITCH_DECLARE(uint32_t) switch_core_session_limit(uint32_t new);
+
 /*! 
   \brief Destroy the core
   \note to be called at application shutdown
@@ -309,6 +316,11 @@ SWITCH_DECLARE(char *) switch_core_session_get_uuid(switch_core_session_t *sessi
 */
 SWITCH_DECLARE(switch_core_session_t *) switch_core_session_locate(char *uuid_str);
 
+/*! 
+  \brief Hangup All Sessions
+*/
+SWITCH_DECLARE(void) switch_core_session_hupall(void);
+
 /*! 
   \brief Send a message to another session using it's uuid
   \param uuid_str the unique id of the session you want to send a message to

src/include/switch_types.h

@@ -619,7 +619,8 @@ typedef enum {
 	SWITCH_CAUSE_MANDATORY_IE_LENGTH_ERROR = 103,
 	SWITCH_CAUSE_PROTOCOL_ERROR = 111,
 	SWITCH_CAUSE_INTERWORKING = 127,
-	SWITCH_CAUSE_CRASH = 500
+	SWITCH_CAUSE_CRASH = 500,
+	SWITCH_CAUSE_SYSTEM_SHUTDOWN = 501
 } switch_call_cause_t;