X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/eb49c237c48682f5087a1a7774a6c977e48a39ad..4ce77a5b1de05dae6092eae478b2a4397173d9c3:/ev.c diff --git a/ev.c b/ev.c index 4cb9467..acde504 100644 --- a/ev.c +++ b/ev.c @@ -96,6 +96,14 @@ extern "C" { # endif # endif +# ifndef EV_USE_INOTIFY +# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H +# define EV_USE_INOTIFY 1 +# else +# define EV_USE_INOTIFY 0 +# endif +# endif + #endif #include @@ -112,10 +120,16 @@ extern "C" { #include +#ifdef EV_H +# include EV_H +#else +# include "ev.h" +#endif + #ifndef _WIN32 -# include # include # include +# include #else # define WIN32_LEAN_AND_MEAN # include @@ -158,6 +172,26 @@ extern "C" { # define EV_USE_PORT 0 #endif +#ifndef EV_USE_INOTIFY +# define EV_USE_INOTIFY 0 +#endif + +#ifndef EV_PID_HASHSIZE +# if EV_MINIMAL +# define EV_PID_HASHSIZE 1 +# else +# define EV_PID_HASHSIZE 16 +# endif +#endif + +#ifndef EV_INOTIFY_HASHSIZE +# if EV_MINIMAL +# define EV_INOTIFY_HASHSIZE 1 +# else +# define EV_INOTIFY_HASHSIZE 16 +# endif +#endif + /**/ #ifndef CLOCK_MONOTONIC @@ -174,34 +208,55 @@ extern "C" { # include #endif +#if !EV_STAT_ENABLE +# define EV_USE_INOTIFY 0 +#endif + +#if EV_USE_INOTIFY +# include +#endif + /**/ +/* + * This is used to avoid floating point rounding problems. + * It is added to ev_rt_now when scheduling periodics + * to ensure progress, time-wise, even when rounding + * errors are against us. + * This value is good at least till the year 4000. + * Better solutions welcome. + */ +#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ + #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect 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 */ - -#ifdef EV_H -# include EV_H -#else -# include "ev.h" -#endif +/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ #if __GNUC__ >= 3 # define expect(expr,value) __builtin_expect ((expr),(value)) -# define inline static inline +# define noinline __attribute__ ((noinline)) #else # define expect(expr,value) (expr) -# define inline static +# define noinline +# if __STDC_VERSION__ < 199901L +# define inline +# endif #endif #define expect_false(expr) expect ((expr) != 0, 0) #define expect_true(expr) expect ((expr) != 0, 1) +#define inline_size static inline + +#if EV_MINIMAL +# define inline_speed static noinline +#else +# define inline_speed static inline +#endif #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) -#define ABSPRI(w) ((w)->priority - EV_MINPRI) +#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) -#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ +#define EMPTY /* required for microsofts broken pseudo-c compiler */ #define EMPTY2(a,b) /* used to suppress some warnings */ typedef ev_watcher *W; @@ -218,12 +273,13 @@ static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ static void (*syserr_cb)(const char *msg); -void ev_set_syserr_cb (void (*cb)(const char *msg)) +void +ev_set_syserr_cb (void (*cb)(const char *msg)) { syserr_cb = cb; } -static void +static void noinline syserr (const char *msg) { if (!msg) @@ -240,12 +296,13 @@ syserr (const char *msg) static void *(*alloc)(void *ptr, long size); -void ev_set_allocator (void *(*cb)(void *ptr, long size)) +void +ev_set_allocator (void *(*cb)(void *ptr, long size)) { alloc = cb; } -static void * +inline_speed void * ev_realloc (void *ptr, long size) { ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); @@ -280,6 +337,13 @@ typedef struct int events; } ANPENDING; +#if EV_USE_INOTIFY +typedef struct +{ + WL head; +} ANFS; +#endif + #if EV_MULTIPLICITY struct ev_loop @@ -322,7 +386,7 @@ ev_time (void) #endif } -inline ev_tstamp +ev_tstamp inline_size get_clock (void) { #if EV_USE_MONOTONIC @@ -345,23 +409,44 @@ ev_now (EV_P) } #endif -#define array_roundsize(type,n) (((n) | 4) & ~3) +int inline_size +array_nextsize (int elem, int cur, int cnt) +{ + int ncur = cur + 1; + + do + ncur <<= 1; + while (cnt > ncur); + + /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ + if (elem * ncur > 4096) + { + ncur *= elem; + ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; + ncur = ncur - sizeof (void *) * 4; + ncur /= elem; + } + + return ncur; +} + +static noinline void * +array_realloc (int elem, void *base, int *cur, int cnt) +{ + *cur = array_nextsize (elem, *cur, cnt); + return ev_realloc (base, elem * *cur); +} #define array_needsize(type,base,cur,cnt,init) \ - if (expect_false ((cnt) > cur)) \ + if (expect_false ((cnt) > (cur))) \ { \ - int newcnt = cur; \ - do \ - { \ - newcnt = array_roundsize (type, newcnt << 1); \ - } \ - while ((cnt) > newcnt); \ - \ - base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ - init (base + cur, newcnt - cur); \ - cur = newcnt; \ + int ocur_ = (cur); \ + (base) = (type *)array_realloc \ + (sizeof (type), (base), &(cur), (cnt)); \ + init ((base) + (ocur_), (cur) - ocur_); \ } +#if 0 #define array_slim(type,stem) \ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ { \ @@ -369,43 +454,31 @@ ev_now (EV_P) base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ } +#endif #define array_free(stem, idx) \ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; /*****************************************************************************/ -static void -anfds_init (ANFD *base, int count) -{ - while (count--) - { - base->head = 0; - base->events = EV_NONE; - base->reify = 0; - - ++base; - } -} - -void +void noinline ev_feed_event (EV_P_ void *w, int revents) { W w_ = (W)w; + int pri = ABSPRI (w_); if (expect_false (w_->pending)) + pendings [pri][w_->pending - 1].events |= revents; + else { - pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; - return; + w_->pending = ++pendingcnt [pri]; + array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); + pendings [pri][w_->pending - 1].w = w_; + pendings [pri][w_->pending - 1].events = revents; } - - w_->pending = ++pendingcnt [ABSPRI (w_)]; - array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2); - pendings [ABSPRI (w_)][w_->pending - 1].w = w_; - pendings [ABSPRI (w_)][w_->pending - 1].events = revents; } -static void +void inline_size queue_events (EV_P_ W *events, int eventcnt, int type) { int i; @@ -414,7 +487,22 @@ queue_events (EV_P_ W *events, int eventcnt, int type) ev_feed_event (EV_A_ events [i], type); } -inline void +/*****************************************************************************/ + +void inline_size +anfds_init (ANFD *base, int count) +{ + while (count--) + { + base->head = 0; + base->events = EV_NONE; + base->reify = 0; + + ++base; + } +} + +void inline_speed fd_event (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; @@ -432,12 +520,11 @@ fd_event (EV_P_ int fd, int revents) void ev_feed_fd_event (EV_P_ int fd, int revents) { - fd_event (EV_A_ fd, revents); + if (fd >= 0 && fd < anfdmax) + fd_event (EV_A_ fd, revents); } -/*****************************************************************************/ - -inline void +void inline_size fd_reify (EV_P) { int i; @@ -471,7 +558,7 @@ fd_reify (EV_P) fdchangecnt = 0; } -static void +void inline_size fd_change (EV_P_ int fd) { if (expect_false (anfds [fd].reify)) @@ -484,7 +571,7 @@ fd_change (EV_P_ int fd) fdchanges [fdchangecnt - 1] = fd; } -static void +void inline_speed fd_kill (EV_P_ int fd) { ev_io *w; @@ -496,7 +583,7 @@ fd_kill (EV_P_ int fd) } } -inline int +int inline_size fd_valid (int fd) { #ifdef _WIN32 @@ -507,7 +594,7 @@ fd_valid (int fd) } /* called on EBADF to verify fds */ -static void +static void noinline fd_ebadf (EV_P) { int fd; @@ -519,7 +606,7 @@ fd_ebadf (EV_P) } /* called on ENOMEM in select/poll to kill some fds and retry */ -static void +static void noinline fd_enomem (EV_P) { int fd; @@ -533,12 +620,11 @@ fd_enomem (EV_P) } /* usually called after fork if backend needs to re-arm all fds from scratch */ -static void +static void noinline 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) { @@ -549,7 +635,7 @@ fd_rearm_all (EV_P) /*****************************************************************************/ -static void +void inline_speed upheap (WT *heap, int k) { WT w = heap [k]; @@ -566,7 +652,7 @@ upheap (WT *heap, int k) } -static void +void inline_speed downheap (WT *heap, int N, int k) { WT w = heap [k]; @@ -590,7 +676,7 @@ downheap (WT *heap, int N, int k) ((W)heap [k])->active = k + 1; } -inline void +void inline_size adjustheap (WT *heap, int N, int k) { upheap (heap, k); @@ -612,7 +698,7 @@ static int sigpipe [2]; static sig_atomic_t volatile gotsig; static ev_io sigev; -static void +void inline_size signals_init (ANSIG *base, int count) { while (count--) @@ -642,7 +728,7 @@ sighandler (int signum) } } -void +void noinline ev_feed_signal_event (EV_P_ int signum) { WL w; @@ -675,7 +761,7 @@ sigcb (EV_P_ ev_io *iow, int revents) ev_feed_signal_event (EV_A_ signum + 1); } -static void +void inline_speed fd_intern (int fd) { #ifdef _WIN32 @@ -687,7 +773,7 @@ fd_intern (int fd) #endif } -static void +static void noinline siginit (EV_P) { fd_intern (sigpipe [0]); @@ -700,45 +786,50 @@ siginit (EV_P) /*****************************************************************************/ -static ev_child *childs [PID_HASHSIZE]; +static ev_child *childs [EV_PID_HASHSIZE]; #ifndef _WIN32 static ev_signal childev; -#ifndef WCONTINUED -# define WCONTINUED 0 -#endif - -static void +void inline_speed child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) { ev_child *w; - for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) + for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) if (w->pid == pid || !w->pid) { - ev_priority (w) = ev_priority (sw); /* need to do it *now* */ - w->rpid = pid; - w->rstatus = status; + ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ + w->rpid = pid; + w->rstatus = status; ev_feed_event (EV_A_ (W)w, EV_CHILD); } } +#ifndef WCONTINUED +# define WCONTINUED 0 +#endif + static void childcb (EV_P_ ev_signal *sw, int revents) { int pid, status; - if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) - { - /* make sure we are called again until all childs have been reaped */ - /* we need to do it this way so that the callback gets called before we continue */ - ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); + /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ + if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) + if (!WCONTINUED + || errno != EINVAL + || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) + return; - child_reap (EV_A_ sw, pid, pid, status); - child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ - } + /* make sure we are called again until all childs have been reaped */ + /* we need to do it this way so that the callback gets called before we continue */ + ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); + + child_reap (EV_A_ sw, pid, pid, status); + if (EV_PID_HASHSIZE > 1) + child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ } #endif @@ -774,7 +865,7 @@ ev_version_minor (void) } /* return true if we are running with elevated privileges and should ignore env variables */ -static int +int inline_size enable_secure (void) { #ifdef _WIN32 @@ -831,7 +922,13 @@ ev_backend (EV_P) return backend; } -static void +unsigned int +ev_loop_count (EV_P) +{ + return loop_count; +} + +static void noinline loop_init (EV_P_ unsigned int flags) { if (!backend) @@ -849,6 +946,12 @@ loop_init (EV_P_ unsigned int flags) now_floor = mn_now; rtmn_diff = ev_rt_now - mn_now; + /* pid check not overridable via env */ +#ifndef _WIN32 + if (flags & EVFLAG_FORKCHECK) + curpid = getpid (); +#endif + if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) @@ -858,6 +961,11 @@ loop_init (EV_P_ unsigned int flags) flags |= ev_recommended_backends (); backend = 0; + backend_fd = -1; +#if EV_USE_INOTIFY + fs_fd = -2; +#endif + #if EV_USE_PORT if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); #endif @@ -879,11 +987,19 @@ loop_init (EV_P_ unsigned int flags) } } -static void +static void noinline loop_destroy (EV_P) { int i; +#if EV_USE_INOTIFY + if (fs_fd >= 0) + close (fs_fd); +#endif + + if (backend_fd >= 0) + close (backend_fd); + #if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_destroy (EV_A); #endif @@ -901,22 +1017,28 @@ loop_destroy (EV_P) #endif for (i = NUMPRI; i--; ) - array_free (pending, [i]); + { + array_free (pending, [i]); +#if EV_IDLE_ENABLE + array_free (idle, [i]); +#endif + } /* have to use the microsoft-never-gets-it-right macro */ - array_free (fdchange, EMPTY0); - array_free (timer, EMPTY0); -#if EV_PERIODICS - array_free (periodic, EMPTY0); + array_free (fdchange, EMPTY); + array_free (timer, EMPTY); +#if EV_PERIODIC_ENABLE + array_free (periodic, EMPTY); #endif - array_free (idle, EMPTY0); - array_free (prepare, EMPTY0); - array_free (check, EMPTY0); + array_free (prepare, EMPTY); + array_free (check, EMPTY); backend = 0; } -static void +void inline_size infy_fork (EV_P); + +void inline_size loop_fork (EV_P) { #if EV_USE_PORT @@ -928,6 +1050,9 @@ loop_fork (EV_P) #if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); #endif +#if EV_USE_INOTIFY + infy_fork (EV_A); +#endif if (ev_is_active (&sigev)) { @@ -1052,19 +1177,13 @@ ev_default_fork (void) /*****************************************************************************/ -static int -any_pending (EV_P) +void +ev_invoke (EV_P_ void *w, int revents) { - int pri; - - for (pri = NUMPRI; pri--; ) - if (pendingcnt [pri]) - return 1; - - return 0; + EV_CB_INVOKE ((W)w, revents); } -inline void +void inline_speed call_pending (EV_P) { int pri; @@ -1076,7 +1195,7 @@ call_pending (EV_P) if (expect_true (p->w)) { - assert (("non-pending watcher on pending list", p->w->pending)); + /*assert (("non-pending watcher on pending list", p->w->pending));*/ p->w->pending = 0; EV_CB_INVOKE (p->w, p->events); @@ -1084,14 +1203,14 @@ call_pending (EV_P) } } -inline void +void inline_size timers_reify (EV_P) { while (timercnt && ((WT)timers [0])->at <= mn_now) { ev_timer *w = timers [0]; - assert (("inactive timer on timer heap detected", ev_is_active (w))); + /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->repeat) @@ -1111,26 +1230,27 @@ timers_reify (EV_P) } } -#if EV_PERIODICS -inline void +#if EV_PERIODIC_ENABLE +void inline_size periodics_reify (EV_P) { while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) { ev_periodic *w = periodics [0]; - assert (("inactive timer on periodic heap detected", ev_is_active (w))); + /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->reschedule_cb) { - ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); + ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); downheap ((WT *)periodics, periodiccnt, 0); } else if (w->interval) { - ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; + ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; + if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval; assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); downheap ((WT *)periodics, periodiccnt, 0); } @@ -1141,7 +1261,7 @@ periodics_reify (EV_P) } } -static void +static void noinline periodics_reschedule (EV_P) { int i; @@ -1154,7 +1274,7 @@ periodics_reschedule (EV_P) if (w->reschedule_cb) ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); else if (w->interval) - ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; + ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; } /* now rebuild the heap */ @@ -1163,75 +1283,89 @@ periodics_reschedule (EV_P) } #endif -inline int -time_update_monotonic (EV_P) +#if EV_IDLE_ENABLE +void inline_size +idle_reify (EV_P) { - mn_now = get_clock (); - - if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) + if (expect_false (idleall)) { - ev_rt_now = rtmn_diff + mn_now; - return 0; - } - else - { - now_floor = mn_now; - ev_rt_now = ev_time (); - return 1; + int pri; + + for (pri = NUMPRI; pri--; ) + { + if (pendingcnt [pri]) + break; + + if (idlecnt [pri]) + { + queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); + break; + } + } } } +#endif -inline void -time_update (EV_P) +void inline_speed +time_update (EV_P_ ev_tstamp max_block) { int i; #if EV_USE_MONOTONIC if (expect_true (have_monotonic)) { - if (time_update_monotonic (EV_A)) + ev_tstamp odiff = rtmn_diff; + + mn_now = get_clock (); + + /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ + /* interpolate in the meantime */ + if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) { - ev_tstamp odiff = rtmn_diff; - - /* loop a few times, before making important decisions. - * on the choice of "4": one iteration isn't enough, - * in case we get preempted during the calls to - * ev_time and get_clock. a second call is almost guarenteed - * to succeed in that case, though. and looping a few more times - * doesn't hurt either as we only do this on time-jumps or - * in the unlikely event of getting preempted here. - */ - for (i = 4; --i; ) - { - rtmn_diff = ev_rt_now - mn_now; + ev_rt_now = rtmn_diff + mn_now; + return; + } - if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) - return; /* all is well */ + now_floor = mn_now; + ev_rt_now = ev_time (); - ev_rt_now = ev_time (); - mn_now = get_clock (); - now_floor = mn_now; - } + /* loop a few times, before making important decisions. + * on the choice of "4": one iteration isn't enough, + * in case we get preempted during the calls to + * ev_time and get_clock. a second call is almost guaranteed + * to succeed in that case, though. and looping a few more times + * doesn't hurt either as we only do this on time-jumps or + * in the unlikely event of having been preempted here. + */ + for (i = 4; --i; ) + { + rtmn_diff = ev_rt_now - mn_now; -# if EV_PERIODICS - periodics_reschedule (EV_A); -# endif - /* no timer adjustment, as the monotonic clock doesn't jump */ - /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ + if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) + return; /* all is well */ + + ev_rt_now = ev_time (); + mn_now = get_clock (); + now_floor = mn_now; } + +# if EV_PERIODIC_ENABLE + periodics_reschedule (EV_A); +# endif + /* no timer adjustment, as the monotonic clock doesn't jump */ + /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ } else #endif { ev_rt_now = ev_time (); - if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) + if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) { -#if EV_PERIODICS +#if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); #endif - - /* adjust timers. this is easy, as the offset is the same for all */ + /* adjust timers. this is easy, as the offset is the same for all of them */ for (i = 0; i < timercnt; ++i) ((WT)timers [i])->at += ev_rt_now - mn_now; } @@ -1261,15 +1395,39 @@ ev_loop (EV_P_ int flags) ? EVUNLOOP_ONE : EVUNLOOP_CANCEL; - while (activecnt) + call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ + + do { - /* queue check watchers (and execute them) */ +#ifndef _WIN32 + if (expect_false (curpid)) /* penalise the forking check even more */ + if (expect_false (getpid () != curpid)) + { + curpid = getpid (); + postfork = 1; + } +#endif + +#if EV_FORK_ENABLE + /* we might have forked, so queue fork handlers */ + if (expect_false (postfork)) + if (forkcnt) + { + queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); + call_pending (EV_A); + } +#endif + + /* queue prepare watchers (and execute them) */ if (expect_false (preparecnt)) { queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); call_pending (EV_A); } + if (expect_false (!activecnt)) + break; + /* we might have forked, so reify kernel state if necessary */ if (expect_false (postfork)) loop_fork (EV_A); @@ -1279,22 +1437,14 @@ ev_loop (EV_P_ int flags) /* calculate blocking time */ { - double block; + ev_tstamp block; - if (flags & EVLOOP_NONBLOCK || idlecnt) + if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) block = 0.; /* do not block at all */ else { /* update time to cancel out callback processing overhead */ -#if EV_USE_MONOTONIC - if (expect_true (have_monotonic)) - time_update_monotonic (EV_A); - else -#endif - { - ev_rt_now = ev_time (); - mn_now = ev_rt_now; - } + time_update (EV_A_ 1e100); block = MAX_BLOCKTIME; @@ -1304,7 +1454,7 @@ ev_loop (EV_P_ int flags) if (block > to) block = to; } -#if EV_PERIODICS +#if EV_PERIODIC_ENABLE if (periodiccnt) { ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; @@ -1315,21 +1465,23 @@ ev_loop (EV_P_ int flags) if (expect_false (block < 0.)) block = 0.; } + ++loop_count; backend_poll (EV_A_ block); - } - /* update ev_rt_now, do magic */ - time_update (EV_A); + /* update ev_rt_now, do magic */ + time_update (EV_A_ block); + } /* queue pending timers and reschedule them */ timers_reify (EV_A); /* relative timers called last */ -#if EV_PERIODICS +#if EV_PERIODIC_ENABLE periodics_reify (EV_A); /* absolute timers called first */ #endif +#if EV_IDLE_ENABLE /* queue idle watchers unless other events are pending */ - if (idlecnt && !any_pending (EV_A)) - queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); + idle_reify (EV_A); +#endif /* queue check watchers, to be executed first */ if (expect_false (checkcnt)) @@ -1337,9 +1489,8 @@ ev_loop (EV_P_ int flags) call_pending (EV_A); - if (expect_false (loop_done)) - break; } + while (expect_true (activecnt && !loop_done)); if (loop_done == EVUNLOOP_ONE) loop_done = EVUNLOOP_CANCEL; @@ -1353,14 +1504,14 @@ ev_unloop (EV_P_ int how) /*****************************************************************************/ -inline void +void inline_size wlist_add (WL *head, WL elem) { elem->next = *head; *head = elem; } -inline void +void inline_size wlist_del (WL *head, WL elem) { while (*head) @@ -1375,8 +1526,8 @@ wlist_del (WL *head, WL elem) } } -inline void -ev_clear_pending (EV_P_ W w) +void inline_speed +clear_pending (EV_P_ W w) { if (w->pending) { @@ -1385,17 +1536,41 @@ ev_clear_pending (EV_P_ W w) } } -inline void -ev_start (EV_P_ W w, int active) +int +ev_clear_pending (EV_P_ void *w) { - if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; - if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; + W w_ = (W)w; + int pending = w_->pending; + if (expect_true (pending)) + { + ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; + w_->pending = 0; + p->w = 0; + return p->events; + } + else + return 0; +} + +void inline_size +pri_adjust (EV_P_ W w) +{ + int pri = w->priority; + pri = pri < EV_MINPRI ? EV_MINPRI : pri; + pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; + w->priority = pri; +} + +void inline_speed +ev_start (EV_P_ W w, int active) +{ + pri_adjust (EV_A_ w); w->active = active; ev_ref (EV_A); } -inline void +void inline_size ev_stop (EV_P_ W w) { ev_unref (EV_A); @@ -1404,7 +1579,7 @@ ev_stop (EV_P_ W w) /*****************************************************************************/ -void +void noinline ev_io_start (EV_P_ ev_io *w) { int fd = w->fd; @@ -1421,10 +1596,10 @@ ev_io_start (EV_P_ ev_io *w) fd_change (EV_A_ fd); } -void +void noinline ev_io_stop (EV_P_ ev_io *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; @@ -1436,7 +1611,7 @@ ev_io_stop (EV_P_ ev_io *w) fd_change (EV_A_ w->fd); } -void +void noinline ev_timer_start (EV_P_ ev_timer *w) { if (expect_false (ev_is_active (w))) @@ -1451,30 +1626,34 @@ ev_timer_start (EV_P_ ev_timer *w) timers [timercnt - 1] = w; upheap ((WT *)timers, timercnt - 1); - assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); + /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ } -void +void noinline ev_timer_stop (EV_P_ ev_timer *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); - if (expect_true (((W)w)->active < timercnt--)) - { - timers [((W)w)->active - 1] = timers [timercnt]; - adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); - } + { + int active = ((W)w)->active; + + if (expect_true (--active < --timercnt)) + { + timers [active] = timers [timercnt]; + adjustheap ((WT *)timers, timercnt, active); + } + } ((WT)w)->at -= mn_now; ev_stop (EV_A_ (W)w); } -void +void noinline ev_timer_again (EV_P_ ev_timer *w) { if (ev_is_active (w)) @@ -1494,8 +1673,8 @@ ev_timer_again (EV_P_ ev_timer *w) } } -#if EV_PERIODICS -void +#if EV_PERIODIC_ENABLE +void noinline ev_periodic_start (EV_P_ ev_periodic *w) { if (expect_false (ev_is_active (w))) @@ -1507,36 +1686,42 @@ ev_periodic_start (EV_P_ ev_periodic *w) { 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 ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; + ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; } + else + ((WT)w)->at = w->offset; ev_start (EV_A_ (W)w, ++periodiccnt); array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); periodics [periodiccnt - 1] = w; upheap ((WT *)periodics, periodiccnt - 1); - assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); + /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ } -void +void noinline ev_periodic_stop (EV_P_ ev_periodic *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); - if (expect_true (((W)w)->active < periodiccnt--)) - { - periodics [((W)w)->active - 1] = periodics [periodiccnt]; - adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); - } + { + int active = ((W)w)->active; + + if (expect_true (--active < --periodiccnt)) + { + periodics [active] = periodics [periodiccnt]; + adjustheap ((WT *)periodics, periodiccnt, active); + } + } ev_stop (EV_A_ (W)w); } -void +void noinline ev_periodic_again (EV_P_ ev_periodic *w) { /* TODO: use adjustheap and recalculation */ @@ -1545,160 +1730,423 @@ ev_periodic_again (EV_P_ ev_periodic *w) } #endif +#ifndef SA_RESTART +# define SA_RESTART 0 +#endif + +void noinline +ev_signal_start (EV_P_ ev_signal *w) +{ +#if EV_MULTIPLICITY + assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); +#endif + if (expect_false (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 (ANSIG, signals, signalmax, w->signum, signals_init); + wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); + + if (!((WL)w)->next) + { +#if _WIN32 + signal (w->signum, sighandler); +#else + 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); +#endif + } +} + +void noinline +ev_signal_stop (EV_P_ ev_signal *w) +{ + clear_pending (EV_A_ (W)w); + if (expect_false (!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_ ev_idle *w) +ev_child_start (EV_P_ ev_child *w) { +#if EV_MULTIPLICITY + assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); +#endif if (expect_false (ev_is_active (w))) return; - ev_start (EV_A_ (W)w, ++idlecnt); - array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); - idles [idlecnt - 1] = w; + ev_start (EV_A_ (W)w, 1); + wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); } void -ev_idle_stop (EV_P_ ev_idle *w) +ev_child_stop (EV_P_ ev_child *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; - { - int active = ((W)w)->active; - idles [active - 1] = idles [--idlecnt]; - ((W)idles [active - 1])->active = active; - } - + wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); ev_stop (EV_A_ (W)w); } +#if EV_STAT_ENABLE + +# ifdef _WIN32 +# undef lstat +# define lstat(a,b) _stati64 (a,b) +# endif + +#define DEF_STAT_INTERVAL 5.0074891 +#define MIN_STAT_INTERVAL 0.1074891 + +static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); + +#if EV_USE_INOTIFY +# define EV_INOTIFY_BUFSIZE 8192 + +static void noinline +infy_add (EV_P_ ev_stat *w) +{ + w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); + + if (w->wd < 0) + { + ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ + + /* monitor some parent directory for speedup hints */ + if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) + { + char path [4096]; + strcpy (path, w->path); + + do + { + int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF + | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); + + char *pend = strrchr (path, '/'); + + if (!pend) + break; /* whoops, no '/', complain to your admin */ + + *pend = 0; + w->wd = inotify_add_watch (fs_fd, path, mask); + } + while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); + } + } + else + ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ + + if (w->wd >= 0) + wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); +} + +static void noinline +infy_del (EV_P_ ev_stat *w) +{ + int slot; + int wd = w->wd; + + if (wd < 0) + return; + + w->wd = -2; + slot = wd & (EV_INOTIFY_HASHSIZE - 1); + wlist_del (&fs_hash [slot].head, (WL)w); + + /* remove this watcher, if others are watching it, they will rearm */ + inotify_rm_watch (fs_fd, wd); +} + +static void noinline +infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) +{ + if (slot < 0) + /* overflow, need to check for all hahs slots */ + for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) + infy_wd (EV_A_ slot, wd, ev); + else + { + WL w_; + + for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) + { + ev_stat *w = (ev_stat *)w_; + w_ = w_->next; /* lets us remove this watcher and all before it */ + + if (w->wd == wd || wd == -1) + { + if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) + { + w->wd = -1; + infy_add (EV_A_ w); /* re-add, no matter what */ + } + + stat_timer_cb (EV_A_ &w->timer, 0); + } + } + } +} + +static void +infy_cb (EV_P_ ev_io *w, int revents) +{ + char buf [EV_INOTIFY_BUFSIZE]; + struct inotify_event *ev = (struct inotify_event *)buf; + int ofs; + int len = read (fs_fd, buf, sizeof (buf)); + + for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) + infy_wd (EV_A_ ev->wd, ev->wd, ev); +} + +void inline_size +infy_init (EV_P) +{ + if (fs_fd != -2) + return; + + fs_fd = inotify_init (); + + if (fs_fd >= 0) + { + ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); + ev_set_priority (&fs_w, EV_MAXPRI); + ev_io_start (EV_A_ &fs_w); + } +} + +void inline_size +infy_fork (EV_P) +{ + int slot; + + if (fs_fd < 0) + return; + + close (fs_fd); + fs_fd = inotify_init (); + + for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) + { + WL w_ = fs_hash [slot].head; + fs_hash [slot].head = 0; + + while (w_) + { + ev_stat *w = (ev_stat *)w_; + w_ = w_->next; /* lets us add this watcher */ + + w->wd = -1; + + if (fs_fd >= 0) + infy_add (EV_A_ w); /* re-add, no matter what */ + else + ev_timer_start (EV_A_ &w->timer); + } + + } +} + +#endif + void -ev_prepare_start (EV_P_ ev_prepare *w) +ev_stat_stat (EV_P_ ev_stat *w) +{ + if (lstat (w->path, &w->attr) < 0) + w->attr.st_nlink = 0; + else if (!w->attr.st_nlink) + w->attr.st_nlink = 1; +} + +static void noinline +stat_timer_cb (EV_P_ ev_timer *w_, int revents) +{ + ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); + + /* we copy this here each the time so that */ + /* prev has the old value when the callback gets invoked */ + w->prev = w->attr; + ev_stat_stat (EV_A_ w); + + /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ + if ( + w->prev.st_dev != w->attr.st_dev + || w->prev.st_ino != w->attr.st_ino + || w->prev.st_mode != w->attr.st_mode + || w->prev.st_nlink != w->attr.st_nlink + || w->prev.st_uid != w->attr.st_uid + || w->prev.st_gid != w->attr.st_gid + || w->prev.st_rdev != w->attr.st_rdev + || w->prev.st_size != w->attr.st_size + || w->prev.st_atime != w->attr.st_atime + || w->prev.st_mtime != w->attr.st_mtime + || w->prev.st_ctime != w->attr.st_ctime + ) { + #if EV_USE_INOTIFY + infy_del (EV_A_ w); + infy_add (EV_A_ w); + ev_stat_stat (EV_A_ w); /* avoid race... */ + #endif + + ev_feed_event (EV_A_ w, EV_STAT); + } +} + +void +ev_stat_start (EV_P_ ev_stat *w) { if (expect_false (ev_is_active (w))) return; - ev_start (EV_A_ (W)w, ++preparecnt); - array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); - prepares [preparecnt - 1] = w; + /* since we use memcmp, we need to clear any padding data etc. */ + memset (&w->prev, 0, sizeof (ev_statdata)); + memset (&w->attr, 0, sizeof (ev_statdata)); + + ev_stat_stat (EV_A_ w); + + if (w->interval < MIN_STAT_INTERVAL) + w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL; + + ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); + ev_set_priority (&w->timer, ev_priority (w)); + +#if EV_USE_INOTIFY + infy_init (EV_A); + + if (fs_fd >= 0) + infy_add (EV_A_ w); + else +#endif + ev_timer_start (EV_A_ &w->timer); + + ev_start (EV_A_ (W)w, 1); } void -ev_prepare_stop (EV_P_ ev_prepare *w) +ev_stat_stop (EV_P_ ev_stat *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; - { - int active = ((W)w)->active; - prepares [active - 1] = prepares [--preparecnt]; - ((W)prepares [active - 1])->active = active; - } +#if EV_USE_INOTIFY + infy_del (EV_A_ w); +#endif + ev_timer_stop (EV_A_ &w->timer); ev_stop (EV_A_ (W)w); } +#endif +#if EV_IDLE_ENABLE void -ev_check_start (EV_P_ ev_check *w) +ev_idle_start (EV_P_ ev_idle *w) { if (expect_false (ev_is_active (w))) return; - ev_start (EV_A_ (W)w, ++checkcnt); - array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); - checks [checkcnt - 1] = w; + pri_adjust (EV_A_ (W)w); + + { + int active = ++idlecnt [ABSPRI (w)]; + + ++idleall; + ev_start (EV_A_ (W)w, active); + + array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); + idles [ABSPRI (w)][active - 1] = w; + } } void -ev_check_stop (EV_P_ ev_check *w) +ev_idle_stop (EV_P_ ev_idle *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; { int active = ((W)w)->active; - checks [active - 1] = checks [--checkcnt]; - ((W)checks [active - 1])->active = active; - } - ev_stop (EV_A_ (W)w); -} + idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; + ((W)idles [ABSPRI (w)][active - 1])->active = active; -#ifndef SA_RESTART -# define SA_RESTART 0 + ev_stop (EV_A_ (W)w); + --idleall; + } +} #endif void -ev_signal_start (EV_P_ ev_signal *w) +ev_prepare_start (EV_P_ ev_prepare *w) { -#if EV_MULTIPLICITY - assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); -#endif if (expect_false (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 (ANSIG, signals, signalmax, w->signum, signals_init); - wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); - - if (!((WL)w)->next) - { -#if _WIN32 - signal (w->signum, sighandler); -#else - 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); -#endif - } + ev_start (EV_A_ (W)w, ++preparecnt); + array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); + prepares [preparecnt - 1] = w; } void -ev_signal_stop (EV_P_ ev_signal *w) +ev_prepare_stop (EV_P_ ev_prepare *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; - wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); - ev_stop (EV_A_ (W)w); + { + int active = ((W)w)->active; + prepares [active - 1] = prepares [--preparecnt]; + ((W)prepares [active - 1])->active = active; + } - if (!signals [w->signum - 1].head) - signal (w->signum, SIG_DFL); + ev_stop (EV_A_ (W)w); } void -ev_child_start (EV_P_ ev_child *w) +ev_check_start (EV_P_ ev_check *w) { -#if EV_MULTIPLICITY - assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); -#endif if (expect_false (ev_is_active (w))) return; - ev_start (EV_A_ (W)w, 1); - wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); + ev_start (EV_A_ (W)w, ++checkcnt); + array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); + checks [checkcnt - 1] = w; } void -ev_child_stop (EV_P_ ev_child *w) +ev_check_stop (EV_P_ ev_check *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; - wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); + { + int active = ((W)w)->active; + checks [active - 1] = checks [--checkcnt]; + ((W)checks [active - 1])->active = active; + } + ev_stop (EV_A_ (W)w); } -#if EV_MULTIPLICITY -void +#if EV_EMBED_ENABLE +void noinline ev_embed_sweep (EV_P_ ev_embed *w) { ev_loop (w->loop, EVLOOP_NONBLOCK); @@ -1729,17 +2177,48 @@ ev_embed_start (EV_P_ ev_embed *w) ev_set_priority (&w->io, ev_priority (w)); ev_io_start (EV_A_ &w->io); + ev_start (EV_A_ (W)w, 1); } void ev_embed_stop (EV_P_ ev_embed *w) { - ev_clear_pending (EV_A_ (W)w); + clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; ev_io_stop (EV_A_ &w->io); + + ev_stop (EV_A_ (W)w); +} +#endif + +#if EV_FORK_ENABLE +void +ev_fork_start (EV_P_ ev_fork *w) +{ + if (expect_false (ev_is_active (w))) + return; + + ev_start (EV_A_ (W)w, ++forkcnt); + array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); + forks [forkcnt - 1] = w; +} + +void +ev_fork_stop (EV_P_ ev_fork *w) +{ + clear_pending (EV_A_ (W)w); + if (expect_false (!ev_is_active (w))) + return; + + { + int active = ((W)w)->active; + forks [active - 1] = forks [--forkcnt]; + ((W)forks [active - 1])->active = active; + } + ev_stop (EV_A_ (W)w); } #endif