X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/deff62d26ff4c1324816c04c0c6db1e4db435870..93de14fb2ac9996d3330d1fce388e75b3b2fb91a:/ev.c?ds=inline diff --git a/ev.c b/ev.c index c12037c..8a32229 100644 --- a/ev.c +++ b/ev.c @@ -56,9 +56,7 @@ #include #include -#include #include -#include #include #include @@ -66,12 +64,15 @@ #include #include #include +#include + +#include + #ifndef WIN32 +# include +# include # include #endif -#include -#include - /**/ #ifndef EV_USE_MONOTONIC @@ -96,7 +97,9 @@ #ifndef EV_USE_WIN32 # ifdef WIN32 -# define EV_USE_WIN32 1 +# define EV_USE_WIN32 0 /* it does not exist, use select */ +# undef EV_USE_SELECT +# define EV_USE_SELECT 1 # else # define EV_USE_WIN32 0 # endif @@ -147,29 +150,28 @@ typedef struct ev_watcher_time *WT; static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ -#if WIN32 -/* note: the comment below could not be substantiated, but what would I care */ -/* MSDN says this is required to handle SIGFPE */ -volatile double SIGFPE_REQ = 0.0f; -#endif +#include "ev_win32.c" /*****************************************************************************/ -static void (*syserr_cb)(void); +static void (*syserr_cb)(const char *msg); -void ev_set_syserr_cb (void (*cb)(void)) +void ev_set_syserr_cb (void (*cb)(const char *msg)) { syserr_cb = cb; } static void -syserr (void) +syserr (const char *msg) { + if (!msg) + msg = "(libev) system error"; + if (syserr_cb) - syserr_cb (); + syserr_cb (msg); else { - perror ("libev"); + perror (msg); abort (); } } @@ -268,31 +270,36 @@ ev_now (EV_P) return rt_now; } -#define array_roundsize(base,n) ((n) | 4 & ~3) +#define array_roundsize(type,n) ((n) | 4 & ~3) -#define array_needsize(base,cur,cnt,init) \ +#define array_needsize(type,base,cur,cnt,init) \ if (expect_false ((cnt) > cur)) \ { \ int newcnt = cur; \ do \ { \ - newcnt = array_roundsize (base, newcnt << 1); \ + newcnt = array_roundsize (type, newcnt << 1); \ } \ while ((cnt) > newcnt); \ \ - base = ev_realloc (base, sizeof (*base) * (newcnt)); \ + base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ init (base + cur, newcnt - cur); \ cur = newcnt; \ } -#define array_slim(stem) \ +#define array_slim(type,stem) \ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ { \ stem ## max = array_roundsize (stem ## cnt >> 1); \ - base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ + base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ } +/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */ +/* bringing us everlasting joy in form of stupid extra macros that are not required in C */ +#define array_free_microshit(stem) \ + ev_free (stem ## s); stem ## cnt = stem ## max = 0; + #define array_free(stem, idx) \ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; @@ -311,19 +318,21 @@ anfds_init (ANFD *base, int count) } } -static void -event (EV_P_ W w, int events) +void +ev_feed_event (EV_P_ void *w, int revents) { - if (w->pending) + W w_ = (W)w; + + if (w_->pending) { - pendings [ABSPRI (w)][w->pending - 1].events |= events; + pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; return; } - w->pending = ++pendingcnt [ABSPRI (w)]; - array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); - pendings [ABSPRI (w)][w->pending - 1].w = w; - pendings [ABSPRI (w)][w->pending - 1].events = events; + w_->pending = ++pendingcnt [ABSPRI (w_)]; + array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void)); + pendings [ABSPRI (w_)][w_->pending - 1].w = w_; + pendings [ABSPRI (w_)][w_->pending - 1].events = revents; } static void @@ -332,7 +341,7 @@ queue_events (EV_P_ W *events, int eventcnt, int type) int i; for (i = 0; i < eventcnt; ++i) - event (EV_A_ events [i], type); + ev_feed_event (EV_A_ events [i], type); } static void @@ -346,7 +355,7 @@ fd_event (EV_P_ int fd, int events) int ev = w->events & events; if (ev) - event (EV_A_ (W)w, ev); + ev_feed_event (EV_A_ (W)w, ev); } } @@ -380,13 +389,13 @@ fd_reify (EV_P) static void fd_change (EV_P_ int fd) { - if (anfds [fd].reify || fdchangecnt < 0) + if (anfds [fd].reify) return; anfds [fd].reify = 1; ++fdchangecnt; - array_needsize (fdchanges, fdchangemax, fdchangecnt, ); + array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); fdchanges [fdchangecnt - 1] = fd; } @@ -398,10 +407,20 @@ fd_kill (EV_P_ int fd) while ((w = (struct ev_io *)anfds [fd].head)) { ev_io_stop (EV_A_ w); - event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); + ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); } } +static int +fd_valid (int fd) +{ +#ifdef WIN32 + return !!win32_get_osfhandle (fd); +#else + return fcntl (fd, F_GETFD) != -1; +#endif +} + /* called on EBADF to verify fds */ static void fd_ebadf (EV_P) @@ -410,7 +429,7 @@ fd_ebadf (EV_P) for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) - if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) + if (!fd_valid (fd) == -1 && errno == EBADF) fd_kill (EV_A_ fd); } @@ -428,7 +447,7 @@ fd_enomem (EV_P) } } -/* susually called after fork if method needs to re-arm all fds from scratch */ +/* usually called after fork if method needs to re-arm all fds from scratch */ static void fd_rearm_all (EV_P) { @@ -526,7 +545,11 @@ sighandler (int signum) { int old_errno = errno; gotsig = 1; +#ifdef WIN32 + send (sigpipe [1], &signum, 1, MSG_DONTWAIT); +#else write (sigpipe [1], &signum, 1); +#endif errno = old_errno; } } @@ -537,7 +560,11 @@ sigcb (EV_P_ struct ev_io *iow, int revents) WL w; int signum; +#ifdef WIN32 + recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); +#else read (sigpipe [0], &revents, 1); +#endif gotsig = 0; for (signum = signalmax; signum--; ) @@ -546,7 +573,7 @@ sigcb (EV_P_ struct ev_io *iow, int revents) signals [signum].gotsig = 0; for (w = signals [signum].head; w; w = w->next) - event (EV_A_ (W)w, EV_SIGNAL); + ev_feed_event (EV_A_ (W)w, EV_SIGNAL); } } @@ -569,9 +596,10 @@ siginit (EV_P) /*****************************************************************************/ +static struct ev_child *childs [PID_HASHSIZE]; + #ifndef WIN32 -static struct ev_child *childs [PID_HASHSIZE]; static struct ev_signal childev; #ifndef WCONTINUED @@ -589,7 +617,7 @@ child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) ev_priority (w) = ev_priority (sw); /* need to do it *now* */ w->rpid = pid; w->rstatus = status; - event (EV_A_ (W)w, EV_CHILD); + ev_feed_event (EV_A_ (W)w, EV_CHILD); } } @@ -601,7 +629,7 @@ childcb (EV_P_ struct ev_signal *sw, int revents) if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) { /* make sure we are called again until all childs have been reaped */ - event (EV_A_ (W)sw, EV_SIGNAL); + ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); child_reap (EV_A_ sw, pid, pid, status); child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ @@ -695,6 +723,9 @@ loop_init (EV_P_ int methods) #if EV_USE_SELECT if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); #endif + + ev_watcher_init (&sigev, sigcb); + ev_set_priority (&sigev, EV_MAXPRI); } } @@ -722,27 +753,43 @@ loop_destroy (EV_P) for (i = NUMPRI; i--; ) array_free (pending, [i]); - array_free (fdchange, ); - array_free (timer, ); - array_free (periodic, ); - array_free (idle, ); - array_free (prepare, ); - array_free (check, ); + /* have to use the microsoft-never-gets-it-right macro */ + array_free_microshit (fdchange); + array_free_microshit (timer); + array_free_microshit (periodic); + array_free_microshit (idle); + array_free_microshit (prepare); + array_free_microshit (check); method = 0; - /*TODO*/ } -void +static 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_is_active (&sigev)) + { + /* default loop */ + + ev_ref (EV_A); + ev_io_stop (EV_A_ &sigev); + close (sigpipe [0]); + close (sigpipe [1]); + + while (pipe (sigpipe)) + syserr ("(libev) error creating pipe"); + + siginit (EV_A); + } + + postfork = 0; } #if EV_MULTIPLICITY @@ -771,7 +818,7 @@ ev_loop_destroy (EV_P) void ev_loop_fork (EV_P) { - loop_fork (EV_A); + postfork = 1; } #endif @@ -804,8 +851,6 @@ ev_default_loop (int methods) if (ev_method (EV_A)) { - ev_watcher_init (&sigev, sigcb); - ev_set_priority (&sigev, EV_MAXPRI); siginit (EV_A); #ifndef WIN32 @@ -829,8 +874,10 @@ ev_default_destroy (void) struct ev_loop *loop = default_loop; #endif +#ifndef WIN32 ev_ref (EV_A); /* child watcher */ ev_signal_stop (EV_A_ &childev); +#endif ev_ref (EV_A); /* signal watcher */ ev_io_stop (EV_A_ &sigev); @@ -848,19 +895,24 @@ ev_default_fork (void) struct ev_loop *loop = default_loop; #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); + if (method) + postfork = 1; } /*****************************************************************************/ +static int +any_pending (EV_P) +{ + int pri; + + for (pri = NUMPRI; pri--; ) + if (pendingcnt [pri]) + return 1; + + return 0; +} + static void call_pending (EV_P) { @@ -898,7 +950,7 @@ timers_reify (EV_P) else ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ - event (EV_A_ (W)w, EV_TIMEOUT); + ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); } } @@ -912,7 +964,14 @@ periodics_reify (EV_P) assert (("inactive timer on periodic heap detected", ev_is_active (w))); /* first reschedule or stop timer */ - if (w->interval) + if (w->reschedule_cb) + { + ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); + + assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now)); + downheap ((WT *)periodics, periodiccnt, 0); + } + else if (w->interval) { ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); @@ -921,7 +980,7 @@ periodics_reify (EV_P) else ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ - event (EV_A_ (W)w, EV_PERIODIC); + ev_feed_event (EV_A_ (W)w, EV_PERIODIC); } } @@ -935,19 +994,15 @@ periodics_reschedule (EV_P) { struct ev_periodic *w = periodics [i]; - if (w->interval) - { - ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; - - if (fabs (diff) >= 1e-4) - { - ev_periodic_stop (EV_A_ w); - ev_periodic_start (EV_A_ w); - - i = 0; /* restart loop, inefficient, but time jumps should be rare */ - } - } + if (w->reschedule_cb) + ((WT)w)->at = w->reschedule_cb (w, rt_now); + else if (w->interval) + ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; } + + /* now rebuild the heap */ + for (i = periodiccnt >> 1; i--; ) + downheap ((WT *)periodics, periodiccnt, i); } inline int @@ -1044,12 +1099,16 @@ ev_loop (EV_P_ int flags) call_pending (EV_A); } + /* we might have forked, so reify kernel state if necessary */ + if (expect_false (postfork)) + loop_fork (EV_A); + /* update fd-related kernel structures */ fd_reify (EV_A); /* calculate blocking time */ - /* we only need this for !monotonic clockor timers, but as we basically + /* we only need this for !monotonic clock or timers, but as we basically always have timers, we just calculate it always */ #if EV_USE_MONOTONIC if (expect_true (have_monotonic)) @@ -1092,7 +1151,7 @@ ev_loop (EV_P_ int flags) periodics_reify (EV_A); /* absolute timers called first */ /* queue idle watchers unless io or timers are pending */ - if (!pendingcnt) + if (idlecnt && !any_pending (EV_A)) queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); /* queue check watchers, to be executed first */ @@ -1177,7 +1236,7 @@ ev_io_start (EV_P_ struct ev_io *w) assert (("ev_io_start called with negative fd", fd >= 0)); ev_start (EV_A_ (W)w, 1); - array_needsize (anfds, anfdmax, fd + 1, anfds_init); + array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); wlist_add ((WL *)&anfds[fd].head, (WL)w); fd_change (EV_A_ fd); @@ -1207,7 +1266,7 @@ ev_timer_start (EV_P_ struct ev_timer *w) assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); ev_start (EV_A_ (W)w, ++timercnt); - array_needsize (timers, timermax, timercnt, ); + array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); timers [timercnt - 1] = w; upheap ((WT *)timers, timercnt - 1); @@ -1257,14 +1316,17 @@ ev_periodic_start (EV_P_ struct ev_periodic *w) if (ev_is_active (w)) return; - 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) - ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; + if (w->reschedule_cb) + ((WT)w)->at = w->reschedule_cb (w, rt_now); + else if (w->interval) + { + 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 */ + ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; + } ev_start (EV_A_ (W)w, ++periodiccnt); - array_needsize (periodics, periodicmax, periodiccnt, ); + array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); periodics [periodiccnt - 1] = w; upheap ((WT *)periodics, periodiccnt - 1); @@ -1289,6 +1351,13 @@ ev_periodic_stop (EV_P_ struct ev_periodic *w) ev_stop (EV_A_ (W)w); } +void +ev_periodic_again (EV_P_ struct ev_periodic *w) +{ + ev_periodic_stop (EV_A_ w); + ev_periodic_start (EV_A_ w); +} + void ev_idle_start (EV_P_ struct ev_idle *w) { @@ -1296,7 +1365,7 @@ ev_idle_start (EV_P_ struct ev_idle *w) return; ev_start (EV_A_ (W)w, ++idlecnt); - array_needsize (idles, idlemax, idlecnt, ); + array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void)); idles [idlecnt - 1] = w; } @@ -1318,7 +1387,7 @@ ev_prepare_start (EV_P_ struct ev_prepare *w) return; ev_start (EV_A_ (W)w, ++preparecnt); - array_needsize (prepares, preparemax, preparecnt, ); + array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void)); prepares [preparecnt - 1] = w; } @@ -1340,7 +1409,7 @@ ev_check_start (EV_P_ struct ev_check *w) return; ev_start (EV_A_ (W)w, ++checkcnt); - array_needsize (checks, checkmax, checkcnt, ); + array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void)); checks [checkcnt - 1] = w; } @@ -1371,7 +1440,7 @@ ev_signal_start (EV_P_ struct ev_signal *w) 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); + array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); if (!((WL)w)->next) @@ -1464,7 +1533,7 @@ once_cb_to (EV_P_ struct ev_timer *w, int revents) void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) { - struct ev_once *once = ev_malloc (sizeof (struct ev_once)); + struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); if (!once) cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);