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108
ev.c
108
ev.c
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@ -3,6 +3,7 @@
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#include <unistd.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stddef.h>
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#include <stdio.h>
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@ -127,10 +128,13 @@ static int pendingmax, pendingcnt;
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static void
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event (W w, int events)
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{
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w->pending = ++pendingcnt;
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array_needsize (pendings, pendingmax, pendingcnt, );
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pendings [pendingcnt - 1].w = w;
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pendings [pendingcnt - 1].events = events;
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if (w->active)
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{
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w->pending = ++pendingcnt;
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array_needsize (pendings, pendingmax, pendingcnt, );
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pendings [pendingcnt - 1].w = w;
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pendings [pendingcnt - 1].events = events;
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}
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}
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static void
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@ -408,6 +412,8 @@ timers_reify ()
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{
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struct ev_timer *w = timers [0];
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event ((W)w, EV_TIMEOUT);
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/* first reschedule or stop timer */
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if (w->repeat)
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{
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@ -417,8 +423,6 @@ timers_reify ()
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}
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else
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evtimer_stop (w); /* nonrepeating: stop timer */
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event ((W)w, EV_TIMEOUT);
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}
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}
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@ -600,19 +604,25 @@ wlist_del (WL *head, WL elem)
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}
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}
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static void
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ev_clear (W w)
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{
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if (w->pending)
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{
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pendings [w->pending - 1].w = 0;
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w->pending = 0;
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}
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}
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static void
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ev_start (W w, int active)
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{
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w->pending = 0;
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w->active = active;
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}
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static void
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ev_stop (W w)
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{
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if (w->pending)
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pendings [w->pending - 1].w = 0;
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w->active = 0;
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}
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@ -638,6 +648,7 @@ evio_start (struct ev_io *w)
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void
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evio_stop (struct ev_io *w)
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{
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ev_clear ((W)w);
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if (!ev_is_active (w))
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return;
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@ -649,7 +660,6 @@ evio_stop (struct ev_io *w)
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fdchanges [fdchangecnt - 1] = w->fd;
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}
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void
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evtimer_start (struct ev_timer *w)
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{
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@ -669,6 +679,7 @@ evtimer_start (struct ev_timer *w)
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void
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evtimer_stop (struct ev_timer *w)
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{
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ev_clear ((W)w);
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if (!ev_is_active (w))
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return;
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@ -721,6 +732,7 @@ evperiodic_start (struct ev_periodic *w)
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void
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evperiodic_stop (struct ev_periodic *w)
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{
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ev_clear ((W)w);
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if (!ev_is_active (w))
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return;
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@ -756,6 +768,7 @@ evsignal_start (struct ev_signal *w)
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void
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evsignal_stop (struct ev_signal *w)
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{
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ev_clear ((W)w);
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if (!ev_is_active (w))
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return;
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@ -778,6 +791,10 @@ void evidle_start (struct ev_idle *w)
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void evidle_stop (struct ev_idle *w)
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{
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ev_clear ((W)w);
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if (ev_is_active (w))
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return;
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idles [w->active - 1] = idles [--idlecnt];
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ev_stop ((W)w);
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}
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@ -794,12 +811,81 @@ void evcheck_start (struct ev_check *w)
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void evcheck_stop (struct ev_check *w)
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{
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ev_clear ((W)w);
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if (ev_is_active (w))
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return;
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checks [w->active - 1] = checks [--checkcnt];
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ev_stop ((W)w);
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}
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/*****************************************************************************/
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struct ev_once
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{
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struct ev_io io;
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struct ev_timer to;
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void (*cb)(int revents, void *arg);
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void *arg;
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};
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static void
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once_cb (struct ev_once *once, int revents)
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{
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void (*cb)(int revents, void *arg) = once->cb;
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void *arg = once->arg;
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evio_stop (&once->io);
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evtimer_stop (&once->to);
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free (once);
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cb (revents, arg);
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}
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static void
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once_cb_io (struct ev_io *w, int revents)
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{
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once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
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}
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static void
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once_cb_to (struct ev_timer *w, int revents)
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{
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once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
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}
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void
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ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
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{
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struct ev_once *once = malloc (sizeof (struct ev_once));
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if (!once)
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cb (EV_ERROR, arg);
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else
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{
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once->cb = cb;
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once->arg = arg;
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evw_init (&once->io, once_cb_io);
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if (fd >= 0)
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{
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evio_set (&once->io, fd, events);
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evio_start (&once->io);
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}
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evw_init (&once->to, once_cb_to);
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if (timeout >= 0.)
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{
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evtimer_set (&once->to, timeout, 0.);
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evtimer_start (&once->to);
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}
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}
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}
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/*****************************************************************************/
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#if 0
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struct ev_io wio;
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22
ev.h
22
ev.h
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@ -12,11 +12,15 @@ typedef double ev_tstamp;
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#define EV_SIGNAL 0x08
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#define EV_IDLE 0x10
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#define EV_CHECK 0x20
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#define EV_ERROR (0x3f|0x80)
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/* can be used to add custom fields to all watchers */
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#ifndef EV_COMMON
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# define EV_COMMON void *data
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#endif
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#ifndef EV_PROTOTYPES
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# define EV_PROTOTYPES 1
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#endif
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/*
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* struct member types:
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#define EVMETHOD_NONE 0
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#define EVMETHOD_SELECT 1
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#define EVMETHOD_EPOLL 2
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int ev_init (int flags); /* returns ev_method */
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#if EV_PROTOTYPES
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extern int ev_method;
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int ev_init (int flags); /* returns ev_method */
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/* these three calls are suitable for plugging into pthread_atfork */
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void ev_prefork (void);
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extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */
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ev_tstamp ev_time (void);
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#endif
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#define EVLOOP_NONBLOCK 1 /* do not block/wait */
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#define EVLOOP_ONESHOT 2 /* block *once* only */
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#if EV_PROTOTYPES
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void ev_loop (int flags);
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extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
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/* convinience function, wait for a single event, without registering an event watcher */
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/* if timeout is < 0, do wait indefinitely */
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void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
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#endif
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/* these may evaluate ev multiple times, and the other arguments at most once */
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/* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */
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#define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->cb = (cb_); } while (0)
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#define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0)
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#define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
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#define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
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#define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0)
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#define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
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#define evcheck_set(ev) /* nop, yes this is a serious in-joke */
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#define evidle_set(ev) /* nop, yes this is a serious in-joke */
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#define evcheck_set(ev) /* nop, yes, this is a serious in-joke */
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#define evidle_set(ev) /* nop, yes, this is a serious in-joke */
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#define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0)
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#define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0)
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/* stopping (enabling, adding) a watcher does nothing if it is already running */
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/* stopping (disabling, deleting) a watcher does nothing unless its already running */
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#if EV_PROTOTYPES
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void evio_start (struct ev_io *w);
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void evio_stop (struct ev_io *w);
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void evcheck_start (struct ev_check *w);
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void evcheck_stop (struct ev_check *w);
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#endif
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#endif
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