1/* Callback management
2 Copyright (C) 2014-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#ifndef CC1_PLUGIN_CALLBACKS_HH
21#define CC1_PLUGIN_CALLBACKS_HH
22
23#include "status.hh"
24#include "hashtab.h"
25
26namespace cc1_plugin
27{
28 class connection;
29
30 // The type of a callback method.
31 typedef status callback_ftype (connection *);
32
33 // This class manages callback functions. A callback has a name and
34 // an underlying function. When a query packet arrives, the name is
35 // inspected and the corresponding function is called. A callback
36 // function has to know how to decode its own arguments, but
37 // wrappers are provided elsewhere to automate this.
38 class callbacks
39 {
40 public:
41
42 callbacks ();
43 ~callbacks ();
44
45 // Add a callback named NAME. FUNC is the function to call when
46 // this method is invoked.
47 void add_callback (const char *name, callback_ftype *func);
48
49 // Look up a callback by name. Returns NULL if the method is not
50 // found.
51 callback_ftype *find_callback (const char *name);
52
53 private:
54
55 // Declared but not defined to avoid use.
56 callbacks (const callbacks &);
57 callbacks &operator= (const callbacks &);
58
59 // The mapping.
60 htab_t m_registry;
61 };
62};
63
64#endif // CC1_PLUGIN_CALLBACKS_HH
65