X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/4ebe9e295b974622f802229ca8e371ee6df9525a..1ef940ed393da8f8d74505196399215d6bb21016:/ev.c?ds=sidebyside diff --git a/ev.c b/ev.c index 0d5e4b9..48ff575 100644 --- a/ev.c +++ b/ev.c @@ -243,9 +243,9 @@ extern "C" { #define expect_true(expr) expect ((expr) != 0, 1) #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; @@ -283,22 +283,22 @@ syserr (const char *msg) } } -static void *(*alloc)(void *ptr, size_t size) = realloc; +static void *(*alloc)(void *ptr, long size); void -ev_set_allocator (void *(*cb)(void *ptr, size_t size)) +ev_set_allocator (void *(*cb)(void *ptr, long size)) { alloc = cb; } inline_speed void * -ev_realloc (void *ptr, size_t size) +ev_realloc (void *ptr, long size) { - ptr = alloc (ptr, size); + ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); if (!ptr && size) { - fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size); + fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); abort (); } @@ -326,12 +326,12 @@ typedef struct int events; } ANPENDING; +#if EV_USE_INOTIFY typedef struct { -#if EV_USE_INOTIFY WL head; -#endif } ANFS; +#endif #if EV_MULTIPLICITY @@ -398,23 +398,44 @@ 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; +} + +inline_speed 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)) \ { \ @@ -422,6 +443,7 @@ 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; @@ -591,7 +613,6 @@ 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) { @@ -767,9 +788,9 @@ child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 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); } } @@ -889,6 +910,12 @@ ev_backend (EV_P) return backend; } +unsigned int +ev_loop_count (EV_P) +{ + return loop_count; +} + static void noinline loop_init (EV_P_ unsigned int flags) { @@ -907,6 +934,12 @@ 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")) @@ -972,21 +1005,27 @@ 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); + array_free (fdchange, EMPTY); + array_free (timer, EMPTY); #if EV_PERIODIC_ENABLE - array_free (periodic, EMPTY0); + 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; } +void inline_size infy_fork (EV_P); + void inline_size loop_fork (EV_P) { @@ -999,6 +1038,9 @@ 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)) { @@ -1123,18 +1165,6 @@ ev_default_fork (void) /*****************************************************************************/ -int inline_size -any_pending (EV_P) -{ - int pri; - - for (pri = NUMPRI; pri--; ) - if (pendingcnt [pri]) - return 1; - - return 0; -} - void inline_speed call_pending (EV_P) { @@ -1234,6 +1264,29 @@ periodics_reschedule (EV_P) } #endif +#if EV_IDLE_ENABLE +void inline_size +idle_reify (EV_P) +{ + if (expect_false (idleall)) + { + 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 + int inline_size time_update_monotonic (EV_P) { @@ -1267,10 +1320,10 @@ time_update (EV_P) /* 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 + * 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 getting preempted here. + * in the unlikely event of having been preempted here. */ for (i = 4; --i; ) { @@ -1302,7 +1355,7 @@ time_update (EV_P) 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; } @@ -1332,17 +1385,28 @@ 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 { - /* we might have forked, so reify kernel state if necessary */ - #if EV_FORK_ENABLE - if (expect_false (postfork)) - if (forkcnt) - { - queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); - call_pending (EV_A); - } - #endif +#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 check watchers (and execute them) */ if (expect_false (preparecnt)) @@ -1351,6 +1415,9 @@ ev_loop (EV_P_ int flags) 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); @@ -1360,9 +1427,9 @@ 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 { @@ -1396,6 +1463,7 @@ ev_loop (EV_P_ int flags) if (expect_false (block < 0.)) block = 0.; } + ++loop_count; backend_poll (EV_A_ block); } @@ -1408,9 +1476,10 @@ ev_loop (EV_P_ int flags) 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)) @@ -1418,9 +1487,8 @@ 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; @@ -1466,12 +1534,19 @@ ev_clear_pending (EV_P_ W w) } } +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) { - if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; - if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; - + pri_adjust (EV_A_ w); w->active = active; ev_ref (EV_A); } @@ -1715,10 +1790,10 @@ ev_child_stop (EV_P_ ev_child *w) #define DEF_STAT_INTERVAL 5.0074891 #define MIN_STAT_INTERVAL 0.1074891 -void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); +static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); #if EV_USE_INOTIFY -# define EV_INOTIFY_BUFSIZE ((PATH_MAX + sizeof (struct inotify_event)) + 2048) +# define EV_INOTIFY_BUFSIZE 8192 static void noinline infy_add (EV_P_ ev_stat *w) @@ -1730,9 +1805,9 @@ infy_add (EV_P_ ev_stat *w) 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) + if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) { - char path [PATH_MAX]; + char path [4096]; strcpy (path, w->path); do @@ -1746,7 +1821,7 @@ infy_add (EV_P_ ev_stat *w) break; /* whoops, no '/', complain to your admin */ *pend = 0; - w->wd = inotify_add_watch (fs_fd, path, IN_DELETE_SELF | IN_CREATE | IN_MOVED_TO | IN_MASK_ADD); + w->wd = inotify_add_watch (fs_fd, path, mask); } while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); } @@ -1761,7 +1836,6 @@ infy_add (EV_P_ ev_stat *w) static void noinline infy_del (EV_P_ ev_stat *w) { - WL w_; int slot; int wd = w->wd; @@ -1800,7 +1874,7 @@ infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) infy_add (EV_A_ w); /* re-add, no matter what */ } - stat_timer_cb (EV_P_ &w->timer, 0); + stat_timer_cb (EV_A_ &w->timer, 0); } } } @@ -1834,6 +1908,38 @@ infy_init (EV_P) } } +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 @@ -1845,7 +1951,7 @@ ev_stat_stat (EV_P_ ev_stat *w) w->attr.st_nlink = 1; } -void noinline +static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents) { ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); @@ -1855,8 +1961,20 @@ stat_timer_cb (EV_P_ ev_timer *w_, int revents) w->prev = w->attr; ev_stat_stat (EV_A_ w); - if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) - { + /* 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); @@ -1913,15 +2031,24 @@ ev_stat_stop (EV_P_ ev_stat *w) } #endif +#if EV_IDLE_ENABLE void ev_idle_start (EV_P_ ev_idle *w) { 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; + 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 @@ -1933,12 +2060,15 @@ ev_idle_stop (EV_P_ ev_idle *w) { int active = ((W)w)->active; - idles [active - 1] = idles [--idlecnt]; - ((W)idles [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; + + ev_stop (EV_A_ (W)w); + --idleall; + } } +#endif void ev_prepare_start (EV_P_ ev_prepare *w)