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3 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
17 * @author Christian Grothoff
20 * Functions related to signals
22 * @defgroup signal Signal library
23 * Manage signal handlers.
27 #ifndef GNUNET_SIGNAL_LIB_H
28 #define GNUNET_SIGNAL_LIB_H
33 #if 0 /* keep Emacsens' auto-indent happy */
39 * Context created when a signal handler is installed;
40 * can be used to restore it to the previous state later.
42 struct GNUNET_SIGNAL_Context;
46 * A signal handler. Since different OSes have different signatures
47 * for their handlers, the API only gives the most restrictive
48 * signature -- no arguments, no return value. Note that this will
49 * work even if the OS expects a function with arguments. However,
50 * the implementation must guarantee that this handler is not called
51 * for signals other than the one that it has been registered for.
54 (*GNUNET_SIGNAL_Handler) (void);
58 * Install a signal handler that will be run if the
59 * given signal is received.
61 * @param signal the number of the signal
62 * @param handler the function to call
63 * @return context that can be used to restore, NULL on error
65 struct GNUNET_SIGNAL_Context *
66 GNUNET_SIGNAL_handler_install (int signal,
67 GNUNET_SIGNAL_Handler handler);
71 * Uninstall a previously installed signal hander.
73 * @param ctx context that was returned when the
74 * signal handler was installed
77 GNUNET_SIGNAL_handler_uninstall (struct GNUNET_SIGNAL_Context *ctx);
81 * Raise the given signal by calling the installed signal handlers. This will
82 * not use the @em raise() system call but only calls the handlers registered
83 * through GNUNET_SIGNAL_handler_install().
85 * @param sig the signal to raise
88 GNUNET_SIGNAL_raise (const int sig);
91 #if 0 /* keep Emacsens' auto-indent happy */
98 /* ifndef GNUNET_SIGNAL_LIB_H */
101 /** @} */ /* end of group */
103 /* end of gnunet_signal_lib.h */