X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/2286b0bd1148eb87826698f86c8224f93ff502cd..1bd3bb1d1727f4452c96ee728278f37bd717a62a:/ev.c?ds=sidebyside diff --git a/ev.c b/ev.c index 9d3a130..937f9bd 100644 --- a/ev.c +++ b/ev.c @@ -26,6 +26,9 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +#if EV_USE_CONFIG_H +# include "config.h" +#endif #include #include @@ -43,27 +46,31 @@ #include #include -#ifndef HAVE_MONOTONIC +#ifndef EV_USE_MONOTONIC # ifdef CLOCK_MONOTONIC -# define HAVE_MONOTONIC 1 +# define EV_USE_MONOTONIC 1 # endif #endif -#ifndef HAVE_SELECT -# define HAVE_SELECT 1 +#ifndef EV_USE_SELECT +# define EV_USE_SELECT 1 #endif -#ifndef HAVE_EPOLL -# define HAVE_EPOLL 0 +#ifndef EV_USE_EPOLL +# define EV_USE_EPOLL 0 #endif -#ifndef HAVE_REALTIME -# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ +#ifndef CLOCK_REALTIME +# define EV_USE_REALTIME 0 +#endif +#ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ #endif #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ -#define MAX_BLOCKTIME 60. -#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ +#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ +#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ +#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ #include "ev.h" @@ -86,7 +93,7 @@ static void (*method_poll)(ev_tstamp timeout); ev_tstamp ev_time (void) { -#if HAVE_REALTIME +#if EV_USE_REALTIME struct timespec ts; clock_gettime (CLOCK_REALTIME, &ts); return ts.tv_sec + ts.tv_nsec * 1e-9; @@ -100,7 +107,7 @@ ev_time (void) static ev_tstamp get_clock (void) { -#if HAVE_MONOTONIC +#if EV_USE_MONOTONIC if (have_monotonic) { struct timespec ts; @@ -112,13 +119,15 @@ get_clock (void) return ev_time (); } +#define array_roundsize(base,n) ((n) | 4 & ~3) + #define array_needsize(base,cur,cnt,init) \ if ((cnt) > cur) \ { \ int newcnt = cur; \ do \ { \ - newcnt = (newcnt << 1) | 4 & ~3; \ + newcnt = array_roundsize (base, newcnt << 1); \ } \ while ((cnt) > newcnt); \ \ @@ -132,7 +141,8 @@ get_clock (void) typedef struct { struct ev_io *head; - int events; + unsigned char events; + unsigned char reify; } ANFD; static ANFD *anfds; @@ -145,6 +155,8 @@ anfds_init (ANFD *base, int count) { base->head = 0; base->events = EV_NONE; + base->reify = 0; + ++base; } } @@ -161,13 +173,16 @@ static int pendingmax, pendingcnt; static void event (W w, int events) { - if (w->active) + if (w->pending) { - w->pending = ++pendingcnt; - array_needsize (pendings, pendingmax, pendingcnt, ); - pendings [pendingcnt - 1].w = w; - pendings [pendingcnt - 1].events = events; + pendings [w->pending - 1].events |= events; + return; } + + w->pending = ++pendingcnt; + array_needsize (pendings, pendingmax, pendingcnt, ); + pendings [pendingcnt - 1].w = w; + pendings [pendingcnt - 1].events = events; } static void @@ -215,7 +230,7 @@ fd_reify (void) for (w = anfd->head; w; w = w->next) events |= w->events; - anfd->events &= ~EV_REIFY; + anfd->reify = 0; if (anfd->events != events) { @@ -230,10 +245,10 @@ fd_reify (void) static void fd_change (int fd) { - if (anfds [fd].events & EV_REIFY) + if (anfds [fd].reify || fdchangecnt < 0) return; - anfds [fd].events |= EV_REIFY; + anfds [fd].reify = 1; ++fdchangecnt; array_needsize (fdchanges, fdchangemax, fdchangecnt, ); @@ -251,8 +266,8 @@ fd_recheck (void) if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) while (anfds [fd].head) { - event ((W)anfds [fd].head, EV_ERROR); - evio_stop (anfds [fd].head); + ev_io_stop (anfds [fd].head); + event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); } } @@ -310,14 +325,14 @@ downheap (WT *timers, int N, int k) typedef struct { struct ev_signal *head; - sig_atomic_t gotsig; + sig_atomic_t volatile gotsig; } ANSIG; static ANSIG *signals; static int signalmax; static int sigpipe [2]; -static sig_atomic_t gotsig; +static sig_atomic_t volatile gotsig; static struct ev_io sigev; static void @@ -327,6 +342,7 @@ signals_init (ANSIG *base, int count) { base->head = 0; base->gotsig = 0; + ++base; } } @@ -339,7 +355,7 @@ sighandler (int signum) if (!gotsig) { gotsig = 1; - write (sigpipe [1], &gotsig, 1); + write (sigpipe [1], &signum, 1); } } @@ -349,8 +365,8 @@ sigcb (struct ev_io *iow, int revents) struct ev_signal *w; int sig; - gotsig = 0; read (sigpipe [0], &revents, 1); + gotsig = 0; for (sig = signalmax; sig--; ) if (signals [sig].gotsig) @@ -372,8 +388,8 @@ siginit (void) fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); - evio_set (&sigev, sigpipe [0], EV_READ); - evio_start (&sigev); + ev_io_set (&sigev, sigpipe [0], EV_READ); + ev_io_start (&sigev); } /*****************************************************************************/ @@ -413,10 +429,10 @@ childcb (struct ev_signal *sw, int revents) /*****************************************************************************/ -#if HAVE_EPOLL +#if EV_USE_EPOLL # include "ev_epoll.c" #endif -#if HAVE_SELECT +#if EV_USE_SELECT # include "ev_select.c" #endif @@ -436,7 +452,7 @@ int ev_init (int flags) { if (!ev_method) { -#if HAVE_MONOTONIC +#if EV_USE_MONOTONIC { struct timespec ts; if (!clock_gettime (CLOCK_MONOTONIC, &ts)) @@ -452,20 +468,20 @@ int ev_init (int flags) return 0; ev_method = EVMETHOD_NONE; -#if HAVE_EPOLL +#if EV_USE_EPOLL if (ev_method == EVMETHOD_NONE) epoll_init (flags); #endif -#if HAVE_SELECT +#if EV_USE_SELECT if (ev_method == EVMETHOD_NONE) select_init (flags); #endif if (ev_method) { - evw_init (&sigev, sigcb); + ev_watcher_init (&sigev, sigcb); siginit (); - evsignal_init (&childev, childcb, SIGCHLD); - evsignal_start (&childev); + ev_signal_init (&childev, childcb, SIGCHLD); + ev_signal_start (&childev); } } @@ -489,12 +505,12 @@ ev_postfork_parent (void) void ev_postfork_child (void) { -#if HAVE_EPOLL +#if EV_USE_EPOLL if (ev_method == EVMETHOD_EPOLL) epoll_postfork_child (); #endif - evio_stop (&sigev); + ev_io_stop (&sigev); close (sigpipe [0]); close (sigpipe [1]); pipe (sigpipe); @@ -525,17 +541,17 @@ timers_reify (void) { struct ev_timer *w = timers [0]; - event ((W)w, EV_TIMEOUT); - /* first reschedule or stop timer */ if (w->repeat) { + assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); w->at = now + w->repeat; - assert (("timer timeout in the past, negative repeat?", w->at > now)); downheap ((WT *)timers, timercnt, 0); } else - evtimer_stop (w); /* nonrepeating: stop timer */ + ev_timer_stop (w); /* nonrepeating: stop timer */ + + event ((W)w, EV_TIMEOUT); } } @@ -550,13 +566,13 @@ periodics_reify (void) if (w->interval) { w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; - assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); + assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); downheap ((WT *)periodics, periodiccnt, 0); } else - evperiodic_stop (w); /* nonrepeating: stop timer */ + ev_periodic_stop (w); /* nonrepeating: stop timer */ - event ((W)w, EV_TIMEOUT); + event ((W)w, EV_PERIODIC); } } @@ -576,8 +592,8 @@ periodics_reschedule (ev_tstamp diff) if (fabs (diff) >= 1e-4) { - evperiodic_stop (w); - evperiodic_start (w); + ev_periodic_stop (w); + ev_periodic_start (w); i = 0; /* restart loop, inefficient, but time jumps should be rare */ } @@ -721,7 +737,7 @@ wlist_del (WL *head, WL elem) } static void -ev_clear (W w) +ev_clear_pending (W w) { if (w->pending) { @@ -745,13 +761,15 @@ ev_stop (W w) /*****************************************************************************/ void -evio_start (struct ev_io *w) +ev_io_start (struct ev_io *w) { if (ev_is_active (w)) return; int fd = w->fd; + assert (("ev_io_start called with negative fd", fd >= 0)); + ev_start ((W)w, 1); array_needsize (anfds, anfdmax, fd + 1, anfds_init); wlist_add ((WL *)&anfds[fd].head, (WL)w); @@ -760,9 +778,9 @@ evio_start (struct ev_io *w) } void -evio_stop (struct ev_io *w) +ev_io_stop (struct ev_io *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (!ev_is_active (w)) return; @@ -773,14 +791,14 @@ evio_stop (struct ev_io *w) } void -evtimer_start (struct ev_timer *w) +ev_timer_start (struct ev_timer *w) { if (ev_is_active (w)) return; w->at += now; - assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); + assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); ev_start ((W)w, ++timercnt); array_needsize (timers, timermax, timercnt, ); @@ -789,9 +807,9 @@ evtimer_start (struct ev_timer *w) } void -evtimer_stop (struct ev_timer *w) +ev_timer_stop (struct ev_timer *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (!ev_is_active (w)) return; @@ -807,7 +825,7 @@ evtimer_stop (struct ev_timer *w) } void -evtimer_again (struct ev_timer *w) +ev_timer_again (struct ev_timer *w) { if (ev_is_active (w)) { @@ -817,19 +835,19 @@ evtimer_again (struct ev_timer *w) downheap ((WT *)timers, timercnt, w->active - 1); } else - evtimer_stop (w); + ev_timer_stop (w); } else if (w->repeat) - evtimer_start (w); + ev_timer_start (w); } void -evperiodic_start (struct ev_periodic *w) +ev_periodic_start (struct ev_periodic *w) { if (ev_is_active (w)) return; - assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); + assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); /* this formula differs from the one in periodic_reify because we do not always round up */ if (w->interval) @@ -842,9 +860,9 @@ evperiodic_start (struct ev_periodic *w) } void -evperiodic_stop (struct ev_periodic *w) +ev_periodic_stop (struct ev_periodic *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (!ev_is_active (w)) return; @@ -858,11 +876,13 @@ evperiodic_stop (struct ev_periodic *w) } void -evsignal_start (struct ev_signal *w) +ev_signal_start (struct ev_signal *w) { if (ev_is_active (w)) return; + assert (("ev_signal_start called with illegal signal number", w->signum > 0)); + ev_start ((W)w, 1); array_needsize (signals, signalmax, w->signum, signals_init); wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); @@ -878,9 +898,9 @@ evsignal_start (struct ev_signal *w) } void -evsignal_stop (struct ev_signal *w) +ev_signal_stop (struct ev_signal *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (!ev_is_active (w)) return; @@ -891,7 +911,8 @@ evsignal_stop (struct ev_signal *w) signal (w->signum, SIG_DFL); } -void evidle_start (struct ev_idle *w) +void +ev_idle_start (struct ev_idle *w) { if (ev_is_active (w)) return; @@ -901,9 +922,10 @@ void evidle_start (struct ev_idle *w) idles [idlecnt - 1] = w; } -void evidle_stop (struct ev_idle *w) +void +ev_idle_stop (struct ev_idle *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (ev_is_active (w)) return; @@ -911,7 +933,8 @@ void evidle_stop (struct ev_idle *w) ev_stop ((W)w); } -void evprepare_start (struct ev_prepare *w) +void +ev_prepare_start (struct ev_prepare *w) { if (ev_is_active (w)) return; @@ -921,9 +944,10 @@ void evprepare_start (struct ev_prepare *w) prepares [preparecnt - 1] = w; } -void evprepare_stop (struct ev_prepare *w) +void +ev_prepare_stop (struct ev_prepare *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (ev_is_active (w)) return; @@ -931,7 +955,8 @@ void evprepare_stop (struct ev_prepare *w) ev_stop ((W)w); } -void evcheck_start (struct ev_check *w) +void +ev_check_start (struct ev_check *w) { if (ev_is_active (w)) return; @@ -941,9 +966,10 @@ void evcheck_start (struct ev_check *w) checks [checkcnt - 1] = w; } -void evcheck_stop (struct ev_check *w) +void +ev_check_stop (struct ev_check *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (ev_is_active (w)) return; @@ -951,7 +977,8 @@ void evcheck_stop (struct ev_check *w) ev_stop ((W)w); } -void evchild_start (struct ev_child *w) +void +ev_child_start (struct ev_child *w) { if (ev_is_active (w)) return; @@ -960,9 +987,10 @@ void evchild_start (struct ev_child *w) wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); } -void evchild_stop (struct ev_child *w) +void +ev_child_stop (struct ev_child *w) { - ev_clear ((W)w); + ev_clear_pending ((W)w); if (ev_is_active (w)) return; @@ -986,8 +1014,8 @@ 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); + ev_io_stop (&once->io); + ev_timer_stop (&once->to); free (once); cb (revents, arg); @@ -1011,26 +1039,24 @@ ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *ar struct ev_once *once = malloc (sizeof (struct ev_once)); if (!once) - cb (EV_ERROR, arg); + cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); else { once->cb = cb; once->arg = arg; - evw_init (&once->io, once_cb_io); - + ev_watcher_init (&once->io, once_cb_io); if (fd >= 0) { - evio_set (&once->io, fd, events); - evio_start (&once->io); + ev_io_set (&once->io, fd, events); + ev_io_start (&once->io); } - evw_init (&once->to, once_cb_to); - + ev_watcher_init (&once->to, once_cb_to); if (timeout >= 0.) { - evtimer_set (&once->to, timeout, 0.); - evtimer_start (&once->to); + ev_timer_set (&once->to, timeout, 0.); + ev_timer_start (&once->to); } } } @@ -1051,16 +1077,16 @@ 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); - evtimer_stop (w); - evtimer_start (w); + 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); - evio_stop (&wio); - evio_start (&wio); + ev_io_stop (&wio); + ev_io_start (&wio); } static void @@ -1074,8 +1100,8 @@ int main (void) { ev_init (0); - evio_init (&wio, sin_cb, 0, EV_READ); - evio_start (&wio); + ev_io_init (&wio, sin_cb, 0, EV_READ); + ev_io_start (&wio); struct ev_timer t[10000]; @@ -1084,29 +1110,29 @@ int main (void) for (i = 0; i < 10000; ++i) { struct ev_timer *w = t + i; - evw_init (w, ocb, i); - evtimer_init_abs (w, ocb, drand48 (), 0.99775533); - evtimer_start (w); + ev_watcher_init (w, ocb, i); + ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); + ev_timer_start (w); if (drand48 () < 0.5) - evtimer_stop (w); + ev_timer_stop (w); } #endif struct ev_timer t1; - evtimer_init (&t1, ocb, 5, 10); - evtimer_start (&t1); + ev_timer_init (&t1, ocb, 5, 10); + ev_timer_start (&t1); struct ev_signal sig; - evsignal_init (&sig, scb, SIGQUIT); - evsignal_start (&sig); + ev_signal_init (&sig, scb, SIGQUIT); + ev_signal_start (&sig); struct ev_check cw; - evcheck_init (&cw, gcb); - evcheck_start (&cw); + ev_check_init (&cw, gcb); + ev_check_start (&cw); struct ev_idle iw; - evidle_init (&iw, gcb); - evidle_start (&iw); + ev_idle_init (&iw, gcb); + ev_idle_start (&iw); ev_loop (0);