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1 /* Callback management
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145
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2 Copyright (C) 2014-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #ifndef CC1_PLUGIN_CALLBACKS_HH
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21 #define CC1_PLUGIN_CALLBACKS_HH
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22
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23 #include "status.hh"
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24 #include "hashtab.h"
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25
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26 namespace cc1_plugin
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27 {
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28 class connection;
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29
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30 // The type of a callback method.
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31 typedef status callback_ftype (connection *);
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32
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33 // This class manages callback functions. A callback has a name and
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34 // an underlying function. When a query packet arrives, the name is
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35 // inspected and the corresponding function is called. A callback
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36 // function has to know how to decode its own arguments, but
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37 // wrappers are provided elsewhere to automate this.
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38 class callbacks
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39 {
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40 public:
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41
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42 callbacks ();
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43 ~callbacks ();
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44
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45 // Add a callback named NAME. FUNC is the function to call when
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46 // this method is invoked.
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47 void add_callback (const char *name, callback_ftype *func);
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48
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49 // Look up a callback by name. Returns NULL if the method is not
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50 // found.
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51 callback_ftype *find_callback (const char *name);
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52
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53 private:
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54
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55 // Declared but not defined to avoid use.
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56 callbacks (const callbacks &);
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57 callbacks &operator= (const callbacks &);
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58
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59 // The mapping.
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60 htab_t m_registry;
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61 };
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62 };
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63
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64 #endif // CC1_PLUGIN_CALLBACKS_HH
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