1 files changed, 84 insertions, 0 deletions
diff --git a/src/include/gnunet_signal_lib.h b/src/include/gnunet_signal_lib.h
new file mode 100644
index 0000000..1597c76
--- /dev/null
+++ b/src/include/gnunet_signal_lib.h
@@ -0,0 +1,84 @@
+/*
+     This file is part of GNUnet.
+     (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file include/gnunet_signal_lib.h
+ * @brief functions related to signals
+ * @author Christian Grothoff
+ */
+
+#ifndef GNUNET_SIGNAL_LIB_H
+#define GNUNET_SIGNAL_LIB_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+/**
+ * Context created when a signal handler is installed;
+ * can be used to restore it to the previous state later.
+ */
+struct GNUNET_SIGNAL_Context;
+
+/**
+ * A signal handler.  Since different OSes have different signatures
+ * for their handlers, the API only gives the most restrictive
+ * signature -- no arguments, no return value.  Note that this will
+ * work even if the OS expects a function with arguments.  However,
+ * the implementation must guarantee that this handler is not called
+ * for signals other than the one that it has been registered for.
+ */
+typedef void (*GNUNET_SIGNAL_Handler) (void);
+
+/**
+ * Install a signal handler that will be run if the
+ * given signal is received.
+ *
+ * @param signal the number of the signal
+ * @param handler the function to call
+ * @return context that can be used to restore, NULL on error
+ */
+struct GNUNET_SIGNAL_Context *
+GNUNET_SIGNAL_handler_install (int signal, GNUNET_SIGNAL_Handler handler);
+
+/**
+ * Uninstall a previously installed signal hander.
+ *
+ * @param ctx context that was returned when the
+ *            signal handler was installed
+ */
+void
+GNUNET_SIGNAL_handler_uninstall (struct GNUNET_SIGNAL_Context *ctx);
+
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/* ifndef GNUNET_SIGNAL_LIB_H */
+#endif
+/* end of gnunet_signal_lib.h */