4 * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 1999,2001,2003 Bernardo Innocenti <bernie@develer.com>
6 * This file is part of DevLib - See devlib/README for information.
9 * \brief Events handling
11 * This module implements a common system for executing
12 * a user defined action calling a hook function.
16 * \author Bernardo Innocenti <bernie@develer.com>
21 * Revision 1.5 2004/07/30 14:30:27 rasky
22 * Resa la sig_signal interrupt safe (con il nuovo scheduler IRQ-safe)
23 * Rimossa event_doIntr (ora inutile) e semplificata la logica delle macro con funzioni inline
25 * Revision 1.4 2004/06/07 15:58:00 aleph
26 * Add function prototypes
28 * Revision 1.3 2004/06/06 18:25:44 bernie
29 * Rename event macros to look like regular functions.
31 * Revision 1.2 2004/06/03 11:27:09 bernie
32 * Add dual-license information.
34 * Revision 1.1 2004/05/23 17:27:00 bernie
35 * Import kern/ subdirectory.
44 #include "config_kern.h"
45 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
58 EVENT_IGNORE, /*!< No-op event */
59 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
60 EVENT_SIGNAL, /*!< Send a signal to a process */
62 EVENT_SOFTINT /*!< Trigger a software interrupt (i.e.: call user hook) */
65 //! User defined callback type
66 typedef void (*Hook)(void *);
70 enum EventAction action;
73 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
76 struct Process *sig_proc; /* Process to be signalled */
77 sig_t sig_bit; /* Signal to send */
82 Hook func; /* Pointer to softint hook */
83 void *user_data; /* Data to be passed back to user hook */
89 /*! Initialize the event \a e as a no-op */
90 #define event_initNone(e) \
91 ((e)->action = EVENT_IGNORE)
93 /*! Same as event_initNone(), but returns the initialized event */
94 INLINE Event event_createNone(void);
95 INLINE Event event_createNone(void)
98 e.action = EVENT_IGNORE;
102 /*! Initialize the event \a e with a software interrupt (call function \a f, with parameter \a u) */
103 #define event_initSoftInt(e,f,u) \
104 ((e)->action = EVENT_SOFTINT,(e)->Ev.Int.func = (f), (e)->Ev.Int.user_data = (u))
106 /*! Same as event_initSoftInt(), but returns the initialized event */
107 INLINE Event event_createSoftInt(Hook func, void* user_data);
108 INLINE Event event_createSoftInt(Hook func, void* user_data)
111 e.action = EVENT_SOFTINT;
112 e.Ev.Int.func = func;
113 e.Ev.Int.user_data = user_data;
118 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
120 /*! Initialize the event \a e with a signal (send signal \a s to process \a p) */
121 #define event_initSignal(e,p,s) \
122 ((e)->action = EVENT_SIGNAL,(e)->Ev.Sig.sig_proc = (p), (e)->Ev.Sig.sig_bit = (s))
124 /*! Same as event_initSignal(), but returns the initialized event */
125 INLINE Event event_createSignal(struct Process* proc, sig_t bit);
126 INLINE Event event_createSignal(struct Process* proc, sig_t bit)
129 e.action = EVENT_SOFTINT;
130 e.Ev.Sig.sig_proc = proc;
131 e.Ev.Sig.sig_bit = bit;
137 /*! Trigger an event */
138 INLINE void event_do(struct Event* e)
140 if ((e)->action == EVENT_SOFTINT)
141 (e)->Ev.Int.func((e)->Ev.Int.user_data);
142 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
143 else if ((e)->action == EVENT_SIGNAL)
144 sig_signal((e)->Ev.Sig.sig_proc, (e)->Ev.Sig.sig_bit);
148 #ifdef CONFIG_KERN_OLDNAMES
149 #define INITEVENT_SIG event_initSignal
150 #define INITEVENT_INT event_initSoftInt
151 #define DOEVENT event_do
152 #define DOEVENT_INTR event_do
155 #endif /* KERN_EVENT_H */