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better destroy support, separate into default loop and additional loops

This commit is contained in:
Marc Alexander Lehmann 2007-11-04 15:58:49 +00:00
parent 3fbfb27c40
commit 0c25f49f94
7 changed files with 271 additions and 206 deletions
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347
ev.c
View File

@ -340,6 +340,21 @@ fd_enomem (EV_P)
}
}
/* susually called after fork if method needs to re-arm all fds from scratch */
static void
fd_rearm_all (EV_P)
{
int fd;
/* this should be highly optimised to not do anything but set a flag */
for (fd = 0; fd < anfdmax; ++fd)
if (anfds [fd].events)
{
anfds [fd].events = 0;
fd_change (fd);
}
}
/*****************************************************************************/
static void
@ -544,7 +559,7 @@ ev_method (EV_P)
return method;
}
inline int
static void
loop_init (EV_P_ int methods)
{
if (!method)
@ -562,12 +577,9 @@ loop_init (EV_P_ int methods)
now_floor = mn_now;
rtmn_diff = rt_now - mn_now;
if (pipe (sigpipe))
return 0;
if (methods == EVMETHOD_AUTO)
if (!enable_secure () && getenv ("LIBmethodS"))
methods = atoi (getenv ("LIBmethodS"));
if (!enable_secure () && getenv ("LIBEV_METHODS"))
methods = atoi (getenv ("LIBEV_METHODS"));
else
methods = EVMETHOD_ANY;
@ -584,8 +596,97 @@ loop_init (EV_P_ int methods)
#if EV_USE_SELECT
if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
#endif
}
}
if (method)
void
loop_destroy (EV_P)
{
#if EV_USE_KQUEUE
if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
#endif
#if EV_USE_EPOLL
if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
#endif
#if EV_USEV_POLL
if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
#endif
#if EV_USE_SELECT
if (method == EVMETHOD_SELECT) select_destroy (EV_A);
#endif
method = 0;
/*TODO*/
}
void
loop_fork (EV_P)
{
/*TODO*/
#if EV_USE_EPOLL
if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
#endif
#if EV_USE_KQUEUE
if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
#endif
}
#if EV_MULTIPLICITY
struct ev_loop *
ev_loop_new (int methods)
{
struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
loop_init (EV_A_ methods);
if (ev_methods (EV_A))
return loop;
return 0;
}
void
ev_loop_destroy (EV_P)
{
loop_destroy (EV_A);
free (loop);
}
void
ev_loop_fork (EV_P)
{
loop_fork (EV_A);
}
#endif
#if EV_MULTIPLICITY
struct ev_loop default_loop_struct;
static struct ev_loop *default_loop;
struct ev_loop *
#else
static int default_loop;
int
#endif
ev_default_loop (int methods)
{
if (sigpipe [0] == sigpipe [1])
if (pipe (sigpipe))
return 0;
if (!default_loop)
{
#if EV_MULTIPLICITY
struct ev_loop *loop = default_loop = &default_loop_struct;
#else
default_loop = 1;
#endif
loop_init (EV_A_ methods);
if (ev_method (EV_A))
{
ev_watcher_init (&sigev, sigcb);
ev_set_priority (&sigev, EV_MAXPRI);
@ -598,73 +699,42 @@ loop_init (EV_P_ int methods)
ev_unref (EV_A); /* child watcher should not keep loop alive */
#endif
}
else
default_loop = 0;
}
return method;
}
#if EV_MULTIPLICITY
struct ev_loop *
ev_loop_new (int methods)
{
struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
if (loop_init (EV_A_ methods))
return loop;
ev_loop_delete (loop);
return 0;
return default_loop;
}
void
ev_loop_delete (EV_P)
ev_default_destroy (void)
{
/*TODO*/
free (loop);
}
struct ev_loop *loop = default_loop;
#else
ev_ref (EV_A); /* child watcher */
ev_signal_stop (EV_A_ &childev);
int
ev_init (int methods)
{
return loop_init (methods);
}
ev_ref (EV_A); /* signal watcher */
ev_io_stop (EV_A_ &sigev);
#endif
close (sigpipe [0]); sigpipe [0] = 0;
close (sigpipe [1]); sigpipe [1] = 0;
/*****************************************************************************/
void
ev_fork_prepare (void)
{
/* nop */
loop_destroy (EV_A);
}
void
ev_fork_parent (void)
ev_default_fork (EV_P)
{
/* nop */
}
void
ev_fork_child (void)
{
/*TODO*/
#if !EV_MULTIPLICITY
#if EV_USE_EPOLL
if (method == EVMETHOD_EPOLL)
epoll_postfork_child (EV_A);
#endif
loop_fork (EV_A);
ev_io_stop (EV_A_ &sigev);
close (sigpipe [0]);
close (sigpipe [1]);
pipe (sigpipe);
ev_ref (EV_A); /* signal watcher */
siginit (EV_A);
#endif
}
/*****************************************************************************/
@ -1085,46 +1155,6 @@ ev_periodic_stop (EV_P_ struct ev_periodic *w)
ev_stop (EV_A_ (W)w);
}
#ifndef SA_RESTART
# define SA_RESTART 0
#endif
void
ev_signal_start (EV_P_ struct ev_signal *w)
{
if (ev_is_active (w))
return;
assert (("ev_signal_start called with illegal signal number", w->signum > 0));
ev_start (EV_A_ (W)w, 1);
array_needsize (signals, signalmax, w->signum, signals_init);
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
if (!w->next)
{
struct sigaction sa;
sa.sa_handler = sighandler;
sigfillset (&sa.sa_mask);
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
sigaction (w->signum, &sa, 0);
}
}
void
ev_signal_stop (EV_P_ struct ev_signal *w)
{
ev_clear_pending (EV_A_ (W)w);
if (!ev_is_active (w))
return;
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
ev_stop (EV_A_ (W)w);
if (!signals [w->signum - 1].head)
signal (w->signum, SIG_DFL);
}
void
ev_idle_start (EV_P_ struct ev_idle *w)
{
@ -1191,9 +1221,55 @@ ev_check_stop (EV_P_ struct ev_check *w)
ev_stop (EV_A_ (W)w);
}
#ifndef SA_RESTART
# define SA_RESTART 0
#endif
void
ev_signal_start (EV_P_ struct ev_signal *w)
{
#if EV_MULTIPLICITY
assert (("signal watchers are only supported in the default loop", loop == default_loop));
#endif
if (ev_is_active (w))
return;
assert (("ev_signal_start called with illegal signal number", w->signum > 0));
ev_start (EV_A_ (W)w, 1);
array_needsize (signals, signalmax, w->signum, signals_init);
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
if (!w->next)
{
struct sigaction sa;
sa.sa_handler = sighandler;
sigfillset (&sa.sa_mask);
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
sigaction (w->signum, &sa, 0);
}
}
void
ev_signal_stop (EV_P_ struct ev_signal *w)
{
ev_clear_pending (EV_A_ (W)w);
if (!ev_is_active (w))
return;
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
ev_stop (EV_A_ (W)w);
if (!signals [w->signum - 1].head)
signal (w->signum, SIG_DFL);
}
void
ev_child_start (EV_P_ struct ev_child *w)
{
#if EV_MULTIPLICITY
assert (("child watchers are only supported in the default loop", loop == default_loop));
#endif
if (ev_is_active (w))
return;
@ -1275,86 +1351,3 @@ ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, vo
}
}
/*****************************************************************************/
#if 0
struct ev_io wio;
static void
sin_cb (struct ev_io *w, int revents)
{
fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
}
static void
ocb (struct ev_timer *w, int revents)
{
//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
ev_timer_stop (w);
ev_timer_start (w);
}
static void
scb (struct ev_signal *w, int revents)
{
fprintf (stderr, "signal %x,%d\n", revents, w->signum);
ev_io_stop (&wio);
ev_io_start (&wio);
}
static void
gcb (struct ev_signal *w, int revents)
{
fprintf (stderr, "generic %x\n", revents);
}
int main (void)
{
ev_init (0);
ev_io_init (&wio, sin_cb, 0, EV_READ);
ev_io_start (&wio);
struct ev_timer t[10000];
#if 0
int i;
for (i = 0; i < 10000; ++i)
{
struct ev_timer *w = t + i;
ev_watcher_init (w, ocb, i);
ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
ev_timer_start (w);
if (drand48 () < 0.5)
ev_timer_stop (w);
}
#endif
struct ev_timer t1;
ev_timer_init (&t1, ocb, 5, 10);
ev_timer_start (&t1);
struct ev_signal sig;
ev_signal_init (&sig, scb, SIGQUIT);
ev_signal_start (&sig);
struct ev_check cw;
ev_check_init (&cw, gcb);
ev_check_start (&cw);
struct ev_idle iw;
ev_idle_init (&iw, gcb);
ev_idle_start (&iw);
ev_loop (0);
return 0;
}
#endif

34
ev.h
View File

@ -212,22 +212,29 @@ struct ev_child
int ev_version_major (void);
int ev_version_minor (void);
/* these three calls are suitable for plugging into pthread_atfork */
void ev_fork_prepare (void);
void ev_fork_parent (void);
void ev_fork_child (void);
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_delete (EV_P);
void ev_loop_destroy (EV_P);
void ev_loop_fork (EV_P);
# else
int ev_init (int methods); /* returns ev_method */
int ev_default_loop (int methods); /* returns true when successful */
# endif
int ev_method (EV_P);
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 */
@ -287,14 +294,12 @@ void ev_io_stop (EV_P_ struct ev_io *w);
void ev_timer_start (EV_P_ struct ev_timer *w);
void ev_timer_stop (EV_P_ struct ev_timer *w);
void ev_timer_again (EV_P_ struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
/* 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 (EV_P_ struct ev_periodic *w);
void ev_periodic_stop (EV_P_ struct ev_periodic *w);
void ev_signal_start (EV_P_ struct ev_signal *w);
void ev_signal_stop (EV_P_ struct ev_signal *w);
void ev_idle_start (EV_P_ struct ev_idle *w);
void ev_idle_stop (EV_P_ struct ev_idle *w);
@ -304,6 +309,11 @@ void ev_prepare_stop (EV_P_ struct ev_prepare *w);
void ev_check_start (EV_P_ struct ev_check *w);
void ev_check_stop (EV_P_ 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

33
ev_epoll.c
View File

@ -45,20 +45,6 @@ epoll_modify (EV_P_ int fd, int oev, int nev)
epoll_ctl (epoll_fd, mode, fd, &ev);
}
static void
epoll_postfork_child (EV_P)
{
int fd;
epoll_fd = epoll_create (256);
fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
/* re-register interest in fds */
for (fd = 0; fd < anfdmax; ++fd)
if (anfds [fd].events)//D
epoll_modify (EV_A_ fd, EV_NONE, anfds [fd].events);
}
static void
epoll_poll (EV_P_ ev_tstamp timeout)
{
@ -105,3 +91,22 @@ epoll_init (EV_P_ int flags)
return EVMETHOD_EPOLL;
}
static void
epoll_destroy (EV_P)
{
close (epoll_fd);
free (epoll_events);
}
static void
epoll_fork (EV_P)
{
int fd;
epoll_fd = epoll_create (256);
fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
fd_rearm_all ();
}

25
ev_kqueue.c
View File

@ -133,6 +133,8 @@ kqueue_init (EV_P_ int flags)
if ((kqueue_fd = kqueue ()) < 0)
return 0;
fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
/* Check for Mac OS X kqueue bug. */
ch.ident = -1;
ch.filter = EVFILT_READ;
@ -159,6 +161,29 @@ kqueue_init (EV_P_ int flags)
kqueue_eventmax = 64; /* intiial number of events receivable per poll */
kqueue_events = malloc (sizeof (struct kevent) * kqueue_eventmax);
kqueue_changes = 0;
kqueue_changemax = 0;
kqueue_changecnt = 0;
return EVMETHOD_KQUEUE;
}
static void
kqueue_destroy (EV_P)
{
close (kqueue_fd);
free (kqueue_events);
free (kqueue_changes);
}
static void
kqueue_fork (EV_P)
{
kqueue_fd = kqueue ();
fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC);
/* re-register interest in fds */
fd_rearm_all ();
}

10
ev_poll.c
View File

@ -101,5 +101,15 @@ poll_init (EV_P_ int flags)
method_modify = poll_modify;
method_poll = poll_poll;
pollidxs = 0; pollidxmax = 0;
polls = 0; pollsmax = 0; pollscnt = 0;
return EVMETHOD_POLL;
}
static void
poll_destroy (EV_P)
{
free (pollidxs);
free (polls);
}

16
ev_select.c
View File

@ -128,6 +128,22 @@ select_init (EV_P_ int flags)
method_modify = select_modify;
method_poll = select_poll;
vec_max = 0;
vec_ri = 0;
vec_ri = 0;
vec_wo = 0;
vec_wo = 0;
return EVMETHOD_SELECT;
}
static void
select_destroy (EV_P)
{
free (vec_ri);
free (vec_ro);
free (vec_wi);
free (vec_wo);
}

12
event.c
View File

@ -32,6 +32,7 @@
#include <stddef.h>
#include <stdlib.h>
#include <sys/time.h>
#include <assert.h>
#include "event.h"
@ -49,7 +50,7 @@ struct event_base
int dummy;
};
static struct event_base x_base, *x_cur;
static struct event_base *x_cur;
static void
tv_set (struct timeval *tv, ev_tstamp at)
@ -82,9 +83,14 @@ const char *event_get_method (void)
void *event_init (void)
{
#if EV_MULTIPLICITY
x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO);
if (x_cur)
x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO);
else
x_cur = ev_default_loop (EVMETHOD_AUTO);
#else
x_cur = &x_base;
assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur));
x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO);
#endif
return x_cur;