#ifndef EV_H
#define EV_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
typedef double ev_tstamp;
+/* these priorities are inclusive, higher priorities will be called earlier */
+#ifndef EV_MINPRI
+# define EV_MINPRI -2
+#endif
+#ifndef EV_MAXPRI
+# define EV_MAXPRI +2
+#endif
+
+#ifndef EV_MULTIPLICITY
+# define EV_MULTIPLICITY 1
+#endif
+
+/* support multiple event loops? */
+#if EV_MULTIPLICITY
+struct ev_loop;
+# define EV_P struct ev_loop *loop
+# define EV_P_ EV_P,
+# define EV_A loop
+# define EV_A_ EV_A,
+#else
+# define EV_P void
+# define EV_P_
+# define EV_A
+# define EV_A_
+#endif
+
/* eventmask, revents, events... */
#define EV_UNDEF -1 /* guaranteed to be invalid */
#define EV_NONE 0x00
#define EV_WATCHER(type) \
int active; /* private */ \
int pending; /* private */ \
+ int priority; /* ro */ \
EV_COMMON; /* rw */ \
- void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */
+ void (*cb)(EV_P_ struct type *, int revents); /* rw */ /* gets invoked with an eventmask */
#define EV_WATCHER_LIST(type) \
EV_WATCHER (type); \
- struct type *next /* private */
+ struct ev_watcher_list *next /* private */
#define EV_WATCHER_TIME(type) \
EV_WATCHER (type); \
struct ev_signal
{
EV_WATCHER_LIST (ev_signal);
+#if EV_MULTIPLICITY
+ struct ev_loop *loop;
+#endif
int signum; /* ro */
};
/* invoked when sigchld is received and waitpid indicates the givne pid */
/* revent EV_CHILD */
+/* does not support priorities */
struct ev_child
{
EV_WATCHER_LIST (ev_child);
- int pid; /* ro */
- int status; /* rw, holds the exit status, use the macros from sys/wait.h */
+ int pid; /* ro */
+ int rpid; /* rw, holds the received pid */
+ int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
};
-#define EVMETHOD_NONE 0
-#define EVMETHOD_SELECT 1
-#define EVMETHOD_EPOLL 2
+#define EVMETHOD_AUTO 0 /* consults environment */
+#define EVMETHOD_SELECT 1
+#define EVMETHOD_POLL 2
+#define EVMETHOD_EPOLL 4
+#define EVMETHOD_KQUEUE 8
+#define EVMETHOD_DEVPOLL 16 /* NYI */
+#define EVMETHOD_PORT 32 /* NYI */
+#define EVMETHOD_ANY ~0 /* any method, do not consult env */
+
#if EV_PROTOTYPES
-extern int ev_method;
-int ev_init (int flags); /* returns ev_method */
int ev_version_major (void);
int ev_version_minor (void);
-/* these three calls are suitable for plugging into pthread_atfork */
-void ev_prefork (void);
-void ev_postfork_parent (void);
-void ev_postfork_child (void);
-
-extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */
ev_tstamp ev_time (void);
+
+# if EV_MULTIPLICITY
+/* the default loop is the only one that handles signals and child watchers */
+/* you can call this as often as you like */
+struct ev_loop *ev_default_loop (int methods); /* returns default loop */
+
+/* create and destroy alternative loops that don't handle signals */
+struct ev_loop *ev_loop_new (int methods);
+void ev_loop_destroy (EV_P);
+void ev_loop_fork (EV_P);
+# else
+int ev_default_loop (int methods); /* returns true when successful */
+# endif
+
+void ev_default_destroy (void); /* destroy the default loop */
+/* this needs to be called after fork, to duplicate the default loop */
+/* if you create alternative loops you have to call ev_loop_fork on them */
+/* you can call it in either the parent or the child */
+/* you can actually call it at any time, anywhere :) */
+void ev_default_fork (void);
+
+int ev_method (EV_P);
#endif
#define EVLOOP_NONBLOCK 1 /* do not block/wait */
#define EVLOOP_ONESHOT 2 /* block *once* only */
+#define EVUNLOOP_ONCE 1 /* unloop once */
+#define EVUNLOOP_ALL 2 /* unloop all loops */
+
#if EV_PROTOTYPES
-void ev_loop (int flags);
-extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
+void ev_loop (EV_P_ int flags);
+void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
+
+ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
+
+/*
+ * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
+ * keeps one reference. if you have a long-runing watcher you never unregister that
+ * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
+ */
+void ev_ref (EV_P);
+void ev_unref (EV_P);
/* convinience function, wait for a single event, without registering an event watcher */
/* if timeout is < 0, do wait indefinitely */
-void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
+void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
#endif
/* these may evaluate ev multiple times, and the other arguments at most once */
/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
-#define ev_watcher_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0)
+#define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0)
#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
#define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
#define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0)
-#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */
+#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */
+#define ev_set_priority(ev,pri) (ev)->priority = pri
/* stopping (enabling, adding) a watcher does nothing if it is already running */
/* stopping (disabling, deleting) a watcher does nothing unless its already running */
#if EV_PROTOTYPES
-void ev_io_start (struct ev_io *w);
-void ev_io_stop (struct ev_io *w);
+void ev_io_start (EV_P_ struct ev_io *w);
+void ev_io_stop (EV_P_ struct ev_io *w);
-void ev_timer_start (struct ev_timer *w);
-void ev_timer_stop (struct ev_timer *w);
-void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
+void ev_timer_start (EV_P_ struct ev_timer *w);
+void ev_timer_stop (EV_P_ struct ev_timer *w);
+/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
+void ev_timer_again (EV_P_ struct ev_timer *w);
-void ev_periodic_start (struct ev_periodic *w);
-void ev_periodic_stop (struct ev_periodic *w);
+void ev_periodic_start (EV_P_ struct ev_periodic *w);
+void ev_periodic_stop (EV_P_ struct ev_periodic *w);
-void ev_signal_start (struct ev_signal *w);
-void ev_signal_stop (struct ev_signal *w);
+void ev_idle_start (EV_P_ struct ev_idle *w);
+void ev_idle_stop (EV_P_ struct ev_idle *w);
-void ev_idle_start (struct ev_idle *w);
-void ev_idle_stop (struct ev_idle *w);
+void ev_prepare_start (EV_P_ struct ev_prepare *w);
+void ev_prepare_stop (EV_P_ struct ev_prepare *w);
-void ev_prepare_start (struct ev_prepare *w);
-void ev_prepare_stop (struct ev_prepare *w);
+void ev_check_start (EV_P_ struct ev_check *w);
+void ev_check_stop (EV_P_ struct ev_check *w);
-void ev_check_start (struct ev_check *w);
-void ev_check_stop (struct ev_check *w);
+/* only supported in the default loop */
+void ev_signal_start (EV_P_ struct ev_signal *w);
+void ev_signal_stop (EV_P_ struct ev_signal *w);
+
+/* only supported in the default loop */
+void ev_child_start (EV_P_ struct ev_child *w);
+void ev_child_stop (EV_P_ struct ev_child *w);
+#endif
-void ev_child_start (struct ev_child *w);
-void ev_child_stop (struct ev_child *w);
+#ifdef __cplusplus
+}
#endif
#endif
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