1/* Callback management
2   Copyright (C) 2014 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