[MEDIUM] signals: add support for registering functions and tasks
The two new functions below make it possible to register any number
of functions or tasks to a system signal. They will be called in the
registration order when the signal is received.
struct sig_handler *signal_register_fct(int sig, void (*fct)(struct sig_handler *), int arg);
struct sig_handler *signal_register_task(int sig, struct task *task, int reason);
diff --git a/include/types/signal.h b/include/types/signal.h
index b863d23..598001e 100644
--- a/include/types/signal.h
+++ b/include/types/signal.h
@@ -1,7 +1,8 @@
/*
+ * include/types/signal.h
* Asynchronous signal delivery functions descriptors.
*
- * Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
+ * Copyright 2000-2010 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -10,11 +11,39 @@
*
*/
+#ifndef _TYPES_SIGNAL_H
+#define _TYPES_SIGNAL_H
+
+
#include <signal.h>
#include <common/config.h>
+#include <common/mini-clist.h>
#include <common/standard.h>
+/* flags for -> flags */
+#define SIG_F_ONE_SHOOT 0x0001 /* unregister handler before calling it */
+#define SIG_F_TYPE_FCT 0x0002 /* handler is a function + arg */
+#define SIG_F_TYPE_TASK 0x0004 /* handler is a task + reason */
+
+/* those are highly dynamic and stored in pools */
+struct sig_handler {
+ struct list list;
+ void *handler; /* function to call or task to wake up */
+ int arg; /* arg to pass to function, or signals*/
+ int flags; /* SIG_F_* */
+};
+
+/* one per signal */
struct signal_descriptor {
- int count; /* number of times raised */
- void (*handler)(int sig);
+ int count; /* number of times raised */
+ struct list handlers; /* sig_handler */
};
+
+#endif /* _TYPES_SIGNAL_H */
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */