* \endcode
*
* \author Bernie Innocenti <bernie@codewiz.org>
+ *
+ * $WIZ$ module_name = "event"
*/
#ifndef KERN_EVENT_H
#define KERN_EVENT_H
-#include <cfg/compiler.h>
#include "cfg/cfg_proc.h"
#include "cfg/cfg_signal.h"
#include "cfg/cfg_timer.h"
+#include <cfg/compiler.h>
#include <cpu/power.h> /* cpu_relax() */
-#if CONFIG_KERN
- #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
- #include <kern/signal.h>
- #endif
-
- /* Forward decl */
- struct Process;
+#if CONFIG_KERN && CONFIG_KERN_SIGNALS
+#include <kern/signal.h>
+/* Forward decl */
+struct Process;
#endif
-/// User defined callback type
-typedef void (*Hook)(void *);
-
typedef struct Event
{
void (*action)(struct Event *);
union
{
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
+#if CONFIG_KERN && CONFIG_KERN_SIGNALS
struct
{
struct Process *sig_proc; /* Process to be signalled */
sigbit_t sig_bit; /* Signal to send */
+ Signal sig; /* Local signal structure (used by generic event) */
} Sig;
-
- struct
- {
- struct Process *sig_proc; /* Process to be signalled */
- Signal sig; /* Signal structure */
- } SigGen;
#endif
struct
{
((e)->action = event_hook_ignore)
/** Same as event_initNone(), but returns the initialized event */
-INLINE Event event_createNone(void);
INLINE Event event_createNone(void)
{
Event e;
return e;
}
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
-
+#if CONFIG_KERN && CONFIG_KERN_SIGNALS
/** Initialize the event \a e with a signal (send signal \a s to process \a p) */
#define event_initSignal(e,p,s) \
((e)->action = event_hook_signal,(e)->Ev.Sig.sig_proc = (p), (e)->Ev.Sig.sig_bit = (s))
return e;
}
-#endif
+/**
+ * Signal used to implement generic events.
+ */
+#define EVENT_GENERIC_SIGNAL SIG_SYSTEM6
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
/** Initialize the generic sleepable event \a e */
#define event_initGeneric(e) \
((e)->action = event_hook_generic_signal, \
- (e)->Ev.SigGen.sig_proc = proc_current(), \
- (e)->Ev.SigGen.sig.wait = 0, (e)->Ev.SigGen.sig.recv = 0)
+ (e)->Ev.Sig.sig_proc = proc_current(), \
+ (e)->Ev.Sig.sig_bit = EVENT_GENERIC_SIGNAL, \
+ (e)->Ev.Sig.sig.wait = 0, (e)->Ev.Sig.sig.recv = 0)
#else
#define event_initGeneric(e) \
((e)->action = event_hook_generic, (e)->Ev.Gen.completed = false)
#endif
-/**
- * Signal used to implement generic events.
- */
-#define EVENT_GENERIC_SIGNAL SIG_SYSTEM5
-
/**
* Create a generic sleepable event.
*
*/
INLINE void event_wait(Event *e)
{
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
+#if CONFIG_KERN_SIGNALS
e->Ev.Sig.sig_proc = proc_current();
- sig_waitSignal(&e->Ev.SigGen.sig, EVENT_GENERIC_SIGNAL);
+ sig_waitSignal(&e->Ev.Sig.sig, EVENT_GENERIC_SIGNAL);
#else
while (ACCESS_SAFE(e->Ev.Gen.completed) == false)
cpu_relax();
* happened, -1 if the timeout expires.
*
* NOTE: timeout == 0 means no timeout.
+ *
+ * \attention The API is work in progress and may change in future versions.
*/
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
-INLINE int event_select(Event **evs, int n, ticks_t timeout)
-{
- sigmask_t mask = (1 << n) - 1;
- int i;
-
- ASSERT(n <= SIG_USER_MAX);
- for (i = 0; i < n; i++)
- {
- Event *e = evs[i];
- /* Map each event to a distinct signal bit */
- event_initSignal(e, proc_current(), 1 << i);
- }
- mask = timeout ? sig_waitTimeout(mask, timeout) : sig_wait(mask);
- i = UINT8_LOG2(mask);
-
- return i < n ? i : -1;
-}
-#else
-INLINE int event_select(Event **evs, int n, ticks_t timeout)
-{
- ticks_t end = timer_clock() + timeout;
- int i;
-
- while (1)
- {
- for (i = 0; i < n; i++)
- {
- Event *e = evs[i];
- if (ACCESS_SAFE(e->Ev.Gen.completed) == true)
- {
- e->Ev.Gen.completed = false;
- MEMORY_BARRIER;
- return i;
- }
- }
- if (timeout && TIMER_AFTER(timer_clock(), end))
- break;
- cpu_relax();
- }
- return -1;
-}
-#endif
-
-
-#if CONFIG_TIMER_EVENTS
-#include <drv/timer.h> /* timer_clock() */
+int event_select(Event **evs, int n, ticks_t timeout);
/**
* Wait the completion of event \a e or \a timeout elapses.
*
* \note It's forbidden to use this function inside irq handling functions.
*/
-INLINE bool event_waitTimeout(Event *e, ticks_t timeout)
-{
- bool ret;
-
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
- e->Ev.Sig.sig_proc = proc_current();
- ret = (sig_waitTimeoutSignal(&e->Ev.SigGen.sig,
- EVENT_GENERIC_SIGNAL, timeout) & SIG_TIMEOUT) ?
- false : true;
-#else
- ticks_t end = timer_clock() + timeout;
-
- while ((ACCESS_SAFE(e->Ev.Gen.completed) == false) ||
- TIMER_AFTER(timer_clock(), end))
- cpu_relax();
- ret = e->Ev.Gen.completed;
- e->Ev.Gen.completed = false;
-#endif
- MEMORY_BARRIER;
- return ret;
-}
-#endif /* CONFIG_TIMER_EVENTS */
+bool event_waitTimeout(Event *e, ticks_t timeout);
/**
* Trigger an event.