X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/228b0b302ab0857b23efad5a8b2429de2c0ccc00..c04c7d0577ceddfe470b6fdcaf727ced91a67d1a:/ev.c?ds=inline diff --git a/ev.c b/ev.c index f813e58..83c643a 100644 --- a/ev.c +++ b/ev.c @@ -30,6 +30,28 @@ */ #ifndef EV_STANDALONE # include "config.h" + +# if HAVE_CLOCK_GETTIME +# define EV_USE_MONOTONIC 1 +# define EV_USE_REALTIME 1 +# endif + +# if HAVE_SELECT && HAVE_SYS_SELECT_H +# define EV_USE_SELECT 1 +# endif + +# if HAVE_POLL && HAVE_POLL_H +# define EV_USE_POLL 1 +# endif + +# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H +# define EV_USE_EPOLL 1 +# endif + +# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H +# define EV_USE_KQUEUE 1 +# endif + #endif #include @@ -60,8 +82,8 @@ # define EV_USE_SELECT 1 #endif -#ifndef EV_USEV_POLL -# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */ +#ifndef EV_USE_POLL +# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ #endif #ifndef EV_USE_EPOLL @@ -115,43 +137,39 @@ typedef struct ev_watcher *W; typedef struct ev_watcher_list *WL; typedef struct ev_watcher_time *WT; -static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */ -static ev_tstamp rt_now; -static int method; +static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ -static int have_monotonic; /* runtime */ +/*****************************************************************************/ -static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ -static void (*method_modify)(EV_P_ int fd, int oev, int nev); -static void (*method_poll)(EV_P_ ev_tstamp timeout); +typedef struct +{ + struct ev_watcher_list *head; + unsigned char events; + unsigned char reify; +} ANFD; -static int activecnt; /* number of active events */ +typedef struct +{ + W w; + int events; +} ANPENDING; -#if EV_USE_SELECT -static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo; -static int vec_max; -#endif +#if EV_MULTIPLICITY -#if EV_USEV_POLL -static struct pollfd *polls; -static int pollmax, pollcnt; -static int *pollidxs; /* maps fds into structure indices */ -static int pollidxmax; -#endif +struct ev_loop +{ +# define VAR(name,decl) decl; +# include "ev_vars.h" +}; +# undef VAR +# include "ev_wrap.h" -#if EV_USE_EPOLL -static int epoll_fd = -1; +#else -static struct epoll_event *events; -static int eventmax; -#endif +# define VAR(name,decl) static decl; +# include "ev_vars.h" +# undef VAR -#if EV_USE_KQUEUE -static int kqueue_fd; -static struct kevent *kqueue_changes; -static int kqueue_changemax, kqueue_changecnt; -static struct kevent *kqueue_events; -static int kqueue_eventmax; #endif /*****************************************************************************/ @@ -210,16 +228,6 @@ ev_now (EV_P) /*****************************************************************************/ -typedef struct -{ - struct ev_watcher_list *head; - unsigned char events; - unsigned char reify; -} ANFD; - -static ANFD *anfds; -static int anfdmax; - static void anfds_init (ANFD *base, int count) { @@ -233,15 +241,6 @@ anfds_init (ANFD *base, int count) } } -typedef struct -{ - W w; - int events; -} ANPENDING; - -static ANPENDING *pendings [NUMPRI]; -static int pendingmax [NUMPRI], pendingcnt [NUMPRI]; - static void event (EV_P_ W w, int events) { @@ -283,9 +282,6 @@ fd_event (EV_P_ int fd, int events) /*****************************************************************************/ -static int *fdchanges; -static int fdchangemax, fdchangecnt; - static void fd_reify (EV_P) { @@ -366,53 +362,62 @@ 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; -static struct ev_timer **timers; -static int timermax, timercnt; + /* 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 (EV_A_ fd); + } +} -static struct ev_periodic **periodics; -static int periodicmax, periodiccnt; +/*****************************************************************************/ static void -upheap (WT *timers, int k) +upheap (WT *heap, int k) { - WT w = timers [k]; + WT w = heap [k]; - while (k && timers [k >> 1]->at > w->at) + while (k && heap [k >> 1]->at > w->at) { - timers [k] = timers [k >> 1]; - timers [k]->active = k + 1; + heap [k] = heap [k >> 1]; + heap [k]->active = k + 1; k >>= 1; } - timers [k] = w; - timers [k]->active = k + 1; + heap [k] = w; + heap [k]->active = k + 1; } static void -downheap (WT *timers, int N, int k) +downheap (WT *heap, int N, int k) { - WT w = timers [k]; + WT w = heap [k]; while (k < (N >> 1)) { int j = k << 1; - if (j + 1 < N && timers [j]->at > timers [j + 1]->at) + if (j + 1 < N && heap [j]->at > heap [j + 1]->at) ++j; - if (w->at <= timers [j]->at) + if (w->at <= heap [j]->at) break; - timers [k] = timers [j]; - timers [k]->active = k + 1; + heap [k] = heap [j]; + heap [k]->active = k + 1; k = j; } - timers [k] = w; - timers [k]->active = k + 1; + heap [k] = w; + heap [k]->active = k + 1; } /*****************************************************************************/ @@ -488,27 +493,17 @@ siginit (EV_P) #endif ev_io_set (&sigev, sigpipe [0], EV_READ); - ev_io_start (&sigev); + ev_io_start (EV_A_ &sigev); + ev_unref (EV_A); /* child watcher should not keep loop alive */ } /*****************************************************************************/ -static struct ev_idle **idles; -static int idlemax, idlecnt; - -static struct ev_prepare **prepares; -static int preparemax, preparecnt; - -static struct ev_check **checks; -static int checkmax, checkcnt; - -/*****************************************************************************/ +#ifndef WIN32 static struct ev_child *childs [PID_HASHSIZE]; static struct ev_signal childev; -#ifndef WIN32 - #ifndef WCONTINUED # define WCONTINUED 0 #endif @@ -553,7 +548,7 @@ childcb (EV_P_ struct ev_signal *sw, int revents) #if EV_USE_EPOLL # include "ev_epoll.c" #endif -#if EV_USEV_POLL +#if EV_USE_POLL # include "ev_poll.c" #endif #if EV_USE_SELECT @@ -590,8 +585,8 @@ ev_method (EV_P) return method; } -int -ev_init (EV_P_ int methods) +static void +loop_init (EV_P_ int methods) { if (!method) { @@ -606,14 +601,11 @@ ev_init (EV_P_ int methods) rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; - diff = rt_now - mn_now; - - if (pipe (sigpipe)) - return 0; + rtmn_diff = rt_now - mn_now; 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; @@ -624,14 +616,103 @@ ev_init (EV_P_ int methods) #if EV_USE_EPOLL if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); #endif -#if EV_USEV_POLL +#if EV_USE_POLL if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); #endif #if EV_USE_SELECT if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); #endif + } +} + +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_USE_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_method (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 - if (method) + loop_init (EV_A_ methods); + + if (ev_method (EV_A)) { ev_watcher_init (&sigev, sigcb); ev_set_priority (&sigev, EV_MAXPRI); @@ -641,40 +722,51 @@ ev_init (EV_P_ int methods) ev_signal_init (&childev, childcb, SIGCHLD); ev_set_priority (&childev, EV_MAXPRI); ev_signal_start (EV_A_ &childev); + ev_unref (EV_A); /* child watcher should not keep loop alive */ #endif } + else + default_loop = 0; } - return method; + return default_loop; } -/*****************************************************************************/ - void -ev_fork_prepare (void) +ev_default_destroy (void) { - /* nop */ -} +#if EV_MULTIPLICITY + struct ev_loop *loop = default_loop; +#endif -void -ev_fork_parent (void) -{ - /* nop */ + ev_ref (EV_A); /* child watcher */ + ev_signal_stop (EV_A_ &childev); + + ev_ref (EV_A); /* signal watcher */ + ev_io_stop (EV_A_ &sigev); + + close (sigpipe [0]); sigpipe [0] = 0; + close (sigpipe [1]); sigpipe [1] = 0; + + loop_destroy (EV_A); } void -ev_fork_child (void) +ev_default_fork (void) { -#if EV_USE_EPOLL - if (method == EVMETHOD_EPOLL) - epoll_postfork_child (); +#if EV_MULTIPLICITY + struct ev_loop *loop = default_loop; #endif - ev_io_stop (&sigev); + loop_fork (EV_A); + + ev_io_stop (EV_A_ &sigev); close (sigpipe [0]); close (sigpipe [1]); pipe (sigpipe); - siginit (); + + ev_ref (EV_A); /* signal watcher */ + siginit (EV_A); } /*****************************************************************************/ @@ -704,6 +796,8 @@ timers_reify (EV_P) { struct ev_timer *w = timers [0]; + assert (("inactive timer on timer heap detected", ev_is_active (w))); + /* first reschedule or stop timer */ if (w->repeat) { @@ -714,7 +808,7 @@ timers_reify (EV_P) else ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ - event ((W)w, EV_TIMEOUT); + event (EV_A_ (W)w, EV_TIMEOUT); } } @@ -725,6 +819,8 @@ periodics_reify (EV_P) { struct ev_periodic *w = periodics [0]; + assert (("inactive timer on periodic heap detected", ev_is_active (w))); + /* first reschedule or stop timer */ if (w->interval) { @@ -740,7 +836,7 @@ periodics_reify (EV_P) } static void -periodics_reschedule (EV_P_ ev_tstamp diff) +periodics_reschedule (EV_P) { int i; @@ -771,7 +867,7 @@ time_update_monotonic (EV_P) if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) { - rt_now = mn_now + diff; + rt_now = rtmn_diff + mn_now; return 0; } else @@ -792,13 +888,13 @@ time_update (EV_P) { if (time_update_monotonic (EV_A)) { - ev_tstamp odiff = diff; + ev_tstamp odiff = rtmn_diff; for (i = 4; --i; ) /* loop a few times, before making important decisions */ { - diff = rt_now - mn_now; + rtmn_diff = rt_now - mn_now; - if (fabs (odiff - diff) < MIN_TIMEJUMP) + if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) return; /* all is well */ rt_now = ev_time (); @@ -806,8 +902,9 @@ time_update (EV_P) now_floor = mn_now; } - periodics_reschedule (EV_A_ diff - odiff); + periodics_reschedule (EV_A); /* no timer adjustment, as the monotonic clock doesn't jump */ + /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ } } else @@ -817,11 +914,11 @@ time_update (EV_P) if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) { - periodics_reschedule (EV_A_ rt_now - mn_now); + periodics_reschedule (EV_A); /* adjust timers. this is easy, as the offset is the same for all */ for (i = 0; i < timercnt; ++i) - timers [i]->at += diff; + timers [i]->at += rt_now - mn_now; } mn_now = rt_now; @@ -913,7 +1010,6 @@ ev_loop (EV_P_ int flags) queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); call_pending (EV_A); - printf ("activecnt %d\n", activecnt);//D } while (activecnt && !loop_done); @@ -1095,46 +1191,6 @@ 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) { @@ -1201,9 +1257,55 @@ 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; @@ -1285,86 +1387,3 @@ 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 - - - -