1 /**
2   @file TSSystemState.h
3 
4   @section license License
5 
6   Licensed to the Apache Software Foundation (ASF) under one
7   or more contributor license agreements.  See the NOTICE file
8   distributed with this work for additional information
9   regarding copyright ownership.  The ASF licenses this file
10   to you under the Apache License, Version 2.0 (the
11   "License"); you may not use this file except in compliance
12   with the License.  You may obtain a copy of the License at
13 
14       http://www.apache.org/licenses/LICENSE-2.0
15 
16   Unless required by applicable law or agreed to in writing, software
17   distributed under the License is distributed on an "AS IS" BASIS,
18   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19   See the License for the specific language governing permissions and
20   limitations under the License.
21 
22 */
23 
24 #pragma once
25 
26 #include <tscore/ink_assert.h>
27 #include <tscore/ink_defs.h>
28 
29 // Global status information for trafficserver
30 //
31 class TSSystemState
32 {
33 private:
34   struct Data {
35     bool ssl_handshaking_stopped;
36     bool event_system_shut_down;
37     bool draining;
38   };
39 
40 public:
41   static bool
is_ssl_handshaking_stopped()42   is_ssl_handshaking_stopped()
43   {
44     return unlikely(_instance().ssl_handshaking_stopped);
45   }
46 
47   static bool
is_event_system_shut_down()48   is_event_system_shut_down()
49   {
50     return unlikely(_instance().event_system_shut_down);
51   }
52 
53   // Keeps track if the server is in draining state, follows the proxy.node.config.draining metric.
54   //
55   static bool
is_draining()56   is_draining()
57   {
58     return unlikely(_instance().draining);
59   }
60 
61   static void
stop_ssl_handshaking()62   stop_ssl_handshaking()
63   {
64     ink_assert(!_instance().ssl_handshaking_stopped);
65 
66     _instance().ssl_handshaking_stopped = true;
67   }
68 
69   static void
shut_down_event_system()70   shut_down_event_system()
71   {
72     // For some reason this is triggered by the regression testing.
73     // ink_assert(_instance().ssl_handshaking_stopped && !_instance().event_system_shut_down);
74 
75     _instance().event_system_shut_down = true;
76   }
77 
78   static void
drain(bool enable)79   drain(bool enable)
80   {
81     _instance().draining = enable;
82   }
83 
84 private:
85   static Data &
_instance()86   _instance()
87   {
88     static Data d;
89 
90     return d;
91   }
92 };
93