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This commit is contained in:
Marc Alexander Lehmann 2007-10-31 13:57:34 +00:00
parent 1392c0d64f
commit fccf308620
2 changed files with 115 additions and 15 deletions
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108
ev.c
View File

@ -3,6 +3,7 @@
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
@ -127,10 +128,13 @@ static int pendingmax, pendingcnt;
static void
event (W w, int events)
{
w->pending = ++pendingcnt;
array_needsize (pendings, pendingmax, pendingcnt, );
pendings [pendingcnt - 1].w = w;
pendings [pendingcnt - 1].events = events;
if (w->active)
{
w->pending = ++pendingcnt;
array_needsize (pendings, pendingmax, pendingcnt, );
pendings [pendingcnt - 1].w = w;
pendings [pendingcnt - 1].events = events;
}
}
static void
@ -408,6 +412,8 @@ timers_reify ()
{
struct ev_timer *w = timers [0];
event ((W)w, EV_TIMEOUT);
/* first reschedule or stop timer */
if (w->repeat)
{
@ -417,8 +423,6 @@ timers_reify ()
}
else
evtimer_stop (w); /* nonrepeating: stop timer */
event ((W)w, EV_TIMEOUT);
}
}
@ -600,19 +604,25 @@ wlist_del (WL *head, WL elem)
}
}
static void
ev_clear (W w)
{
if (w->pending)
{
pendings [w->pending - 1].w = 0;
w->pending = 0;
}
}
static void
ev_start (W w, int active)
{
w->pending = 0;
w->active = active;
}
static void
ev_stop (W w)
{
if (w->pending)
pendings [w->pending - 1].w = 0;
w->active = 0;
}
@ -638,6 +648,7 @@ evio_start (struct ev_io *w)
void
evio_stop (struct ev_io *w)
{
ev_clear ((W)w);
if (!ev_is_active (w))
return;
@ -649,7 +660,6 @@ evio_stop (struct ev_io *w)
fdchanges [fdchangecnt - 1] = w->fd;
}
void
evtimer_start (struct ev_timer *w)
{
@ -669,6 +679,7 @@ evtimer_start (struct ev_timer *w)
void
evtimer_stop (struct ev_timer *w)
{
ev_clear ((W)w);
if (!ev_is_active (w))
return;
@ -721,6 +732,7 @@ evperiodic_start (struct ev_periodic *w)
void
evperiodic_stop (struct ev_periodic *w)
{
ev_clear ((W)w);
if (!ev_is_active (w))
return;
@ -756,6 +768,7 @@ evsignal_start (struct ev_signal *w)
void
evsignal_stop (struct ev_signal *w)
{
ev_clear ((W)w);
if (!ev_is_active (w))
return;
@ -778,6 +791,10 @@ void evidle_start (struct ev_idle *w)
void evidle_stop (struct ev_idle *w)
{
ev_clear ((W)w);
if (ev_is_active (w))
return;
idles [w->active - 1] = idles [--idlecnt];
ev_stop ((W)w);
}
@ -794,12 +811,81 @@ void evcheck_start (struct ev_check *w)
void evcheck_stop (struct ev_check *w)
{
ev_clear ((W)w);
if (ev_is_active (w))
return;
checks [w->active - 1] = checks [--checkcnt];
ev_stop ((W)w);
}
/*****************************************************************************/
struct ev_once
{
struct ev_io io;
struct ev_timer to;
void (*cb)(int revents, void *arg);
void *arg;
};
static void
once_cb (struct ev_once *once, int revents)
{
void (*cb)(int revents, void *arg) = once->cb;
void *arg = once->arg;
evio_stop (&once->io);
evtimer_stop (&once->to);
free (once);
cb (revents, arg);
}
static void
once_cb_io (struct ev_io *w, int revents)
{
once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
}
static void
once_cb_to (struct ev_timer *w, int revents)
{
once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
}
void
ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
{
struct ev_once *once = malloc (sizeof (struct ev_once));
if (!once)
cb (EV_ERROR, arg);
else
{
once->cb = cb;
once->arg = arg;
evw_init (&once->io, once_cb_io);
if (fd >= 0)
{
evio_set (&once->io, fd, events);
evio_start (&once->io);
}
evw_init (&once->to, once_cb_to);
if (timeout >= 0.)
{
evtimer_set (&once->to, timeout, 0.);
evtimer_start (&once->to);
}
}
}
/*****************************************************************************/
#if 0
struct ev_io wio;

22
ev.h
View File

@ -12,11 +12,15 @@ typedef double ev_tstamp;
#define EV_SIGNAL 0x08
#define EV_IDLE 0x10
#define EV_CHECK 0x20
#define EV_ERROR (0x3f|0x80)
/* can be used to add custom fields to all watchers */
#ifndef EV_COMMON
# define EV_COMMON void *data
#endif
#ifndef EV_PROTOTYPES
# define EV_PROTOTYPES 1
#endif
/*
* struct member types:
@ -103,8 +107,9 @@ struct ev_check
#define EVMETHOD_NONE 0
#define EVMETHOD_SELECT 1
#define EVMETHOD_EPOLL 2
int ev_init (int flags); /* returns ev_method */
#if EV_PROTOTYPES
extern int ev_method;
int ev_init (int flags); /* returns ev_method */
/* these three calls are suitable for plugging into pthread_atfork */
void ev_prefork (void);
@ -113,22 +118,29 @@ 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);
#endif
#define EVLOOP_NONBLOCK 1 /* do not block/wait */
#define EVLOOP_ONESHOT 2 /* block *once* only */
#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 */
/* 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);
#endif
/* these may evaluate ev multiple times, and the other arguments at most once */
/* 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 evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0)
#define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } 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 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)
@ -141,6 +153,7 @@ extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to bre
/* 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 evio_start (struct ev_io *w);
void evio_stop (struct ev_io *w);
@ -159,6 +172,7 @@ void evidle_stop (struct ev_idle *w);
void evcheck_start (struct ev_check *w);
void evcheck_stop (struct ev_check *w);
#endif
#endif