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-rw-r--r--ev.h73
1 files changed, 54 insertions, 19 deletions
diff --git a/ev.h b/ev.h
index 36f35a5..9d2b2e9 100644
--- a/ev.h
+++ b/ev.h
@@ -13,25 +13,47 @@ typedef double ev_tstamp;
#define EV_IDLE 0x10
#define EV_CHECK 0x20
+/* can be used to add custom fields to all watchers */
+#ifndef EV_COMMON
+# define EV_COMMON void *data
+#endif
+
+/*
+ * struct member types:
+ * private: you can look at them, but not change them, and they might not mean anything to you.
+ * ro: can be read anytime, but only changed when the watcher isn't active
+ * rw: can be read and modified anytime, even when the watcher is active
+ */
+
/* shared by all watchers */
#define EV_WATCHER(type) \
int active; /* private */ \
int pending; /* private */ \
- void *data; /* rw */ \
- void (*cb)(struct type *, int revents) /* rw */ /* gets invoked with an eventmask */
+ EV_COMMON; /* rw */ \
+ void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */
#define EV_WATCHER_LIST(type) \
EV_WATCHER (type); \
struct type *next /* private */
-/* invoked at a specific time or after a specific time, repeatable */
+#define EV_WATCHER_TIME(type) \
+ EV_WATCHER (type); \
+ ev_tstamp at /* private */
+
+/* invoked after a specific time, repeatable (based on monotonic clock) */
struct ev_timer
{
- EV_WATCHER_LIST (ev_timer);
+ EV_WATCHER_TIME (ev_timer);
- ev_tstamp at; /* private */
ev_tstamp repeat; /* rw */
- unsigned char is_abs; /* ro */
+};
+
+/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
+struct ev_periodic
+{
+ EV_WATCHER_TIME (ev_periodic);
+
+ ev_tstamp interval; /* rw */
};
/* invoked when fd is either EV_READable or EV_WRITEable */
@@ -83,31 +105,44 @@ void ev_loop (int flags);
extern int ev_loop_done; /* set to 1 to break out of event loop */
/* these may evaluate ev multiple times, and the other arguments at most once */
-#define evw_init(ev,cb_,data_) do { (ev)->active = 0; (ev)->cb = (cb_); (ev)->data = (void *)data_; } while (0)
+/* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */
+#define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->cb = (cb_); } while (0)
#define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
-#define evtimer_set_rel(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); (ev)->is_abs = 0; } while (0)
-#define evtimer_set_abs(ev,at_,repeat_) do { (ev)->at = (at_); (ev)->repeat = (repeat_); (ev)->is_abs = 1; } while (0)
+#define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
+#define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0)
#define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
+#define evcheck_set(ev) /* nop, yes this is a serious in-joke */
+#define evidle_set(ev) /* nop, yes this is a serious in-joke */
+
+#define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0)
+#define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0)
+#define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0)
+#define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0)
+#define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0)
+#define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0)
#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */
/* stopping (enabling, adding) a watcher does nothing if it is already running */
/* stopping (disabling, deleting) a watcher does nothing unless its already running */
-void evio_start (struct ev_io *w);
-void evio_stop (struct ev_io *w);
+void evio_start (struct ev_io *w);
+void evio_stop (struct ev_io *w);
+
+void evtimer_start (struct ev_timer *w);
+void evtimer_stop (struct ev_timer *w);
-void evtimer_start (struct ev_timer *w);
-void evtimer_stop (struct ev_timer *w);
+void evperiodic_start (struct ev_periodic *w);
+void evperiodic_stop (struct ev_periodic *w);
-void evsignal_start (struct ev_signal *w);
-void evsignal_stop (struct ev_signal *w);
+void evsignal_start (struct ev_signal *w);
+void evsignal_stop (struct ev_signal *w);
-void evidle_start (struct ev_idle *w);
-void evidle_stop (struct ev_idle *w);
+void evidle_start (struct ev_idle *w);
+void evidle_stop (struct ev_idle *w);
-void evcheck_start (struct ev_check *w);
-void evcheck_stop (struct ev_check *w);
+void evcheck_start (struct ev_check *w);
+void evcheck_stop (struct ev_check *w);
#endif