add cumulative count of sessions from switch startup. Resolves http://jira.freeswitch.org/browse/FSCORE-18. Updated patch to change data type of session_id to avoid rollover (wouldn't that be nice) and added - 1 to accurately reflect count. Thanks bkw for the patch.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4999 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_core_session.c

@@ -40,7 +40,7 @@ static struct {
 	switch_mutex_t *session_table_mutex;
 	uint32_t session_count;
 	uint32_t session_limit;
-	uint32_t session_id;
+	switch_size_t session_id;
 } runtime;
 
 
@@ -820,6 +820,12 @@ SWITCH_DECLARE(uint32_t) switch_core_session_count(void)
 	return runtime.session_count;
 }
 
+SWITCH_DECLARE(switch_size_t) switch_core_session_id(void)
+{
+	return runtime.session_id;
+}
+
+
 SWITCH_DECLARE(switch_core_session_t *) switch_core_session_request_by_name(char *endpoint_name, switch_memory_pool_t **pool)
 {
 	const switch_endpoint_interface_t *endpoint_interface;