--- libev/ev.c 2008/04/06 12:45:58 1.222 +++ libev/ev.c 2010/02/16 09:32:39 1.329 @@ -1,7 +1,7 @@ /* * libev event processing core, watcher management * - * Copyright (c) 2007,2008 Marc Alexander Lehmann + * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- @@ -49,12 +49,26 @@ # include "config.h" # endif +# if HAVE_CLOCK_SYSCALL +# ifndef EV_USE_CLOCK_SYSCALL +# define EV_USE_CLOCK_SYSCALL 1 +# ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 0 +# endif +# ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +# endif +# endif +# elif !defined(EV_USE_CLOCK_SYSCALL) +# define EV_USE_CLOCK_SYSCALL 0 +# endif + # if HAVE_CLOCK_GETTIME # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # endif # ifndef EV_USE_REALTIME -# define EV_USE_REALTIME 1 +# define EV_USE_REALTIME 0 # endif # else # ifndef EV_USE_MONOTONIC @@ -98,7 +112,7 @@ # endif # ifndef EV_USE_KQUEUE -# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H +# if HAVE_KQUEUE && HAVE_SYS_EVENT_H # define EV_USE_KQUEUE 1 # else # define EV_USE_KQUEUE 0 @@ -121,6 +135,14 @@ # endif # endif +# ifndef EV_USE_SIGNALFD +# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H +# define EV_USE_SIGNALFD 1 +# else +# define EV_USE_SIGNALFD 0 +# endif +# endif + # ifndef EV_USE_EVENTFD # if HAVE_EVENTFD # define EV_USE_EVENTFD 1 @@ -128,11 +150,12 @@ # define EV_USE_EVENTFD 0 # endif # endif - + #endif #include #include +#include #include #include @@ -142,6 +165,7 @@ #include #include #include +#include #include @@ -156,6 +180,7 @@ # include # include #else +# include # define WIN32_LEAN_AND_MEAN # include # ifndef EV_SELECT_IS_WINSOCKET @@ -165,16 +190,59 @@ /* this block tries to deduce configuration from header-defined symbols and defaults */ +/* try to deduce the maximum number of signals on this platform */ +#if defined (EV_NSIG) +/* use what's provided */ +#elif defined (NSIG) +# define EV_NSIG (NSIG) +#elif defined(_NSIG) +# define EV_NSIG (_NSIG) +#elif defined (SIGMAX) +# define EV_NSIG (SIGMAX+1) +#elif defined (SIG_MAX) +# define EV_NSIG (SIG_MAX+1) +#elif defined (_SIG_MAX) +# define EV_NSIG (_SIG_MAX+1) +#elif defined (MAXSIG) +# define EV_NSIG (MAXSIG+1) +#elif defined (MAX_SIG) +# define EV_NSIG (MAX_SIG+1) +#elif defined (SIGARRAYSIZE) +# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ +#elif defined (_sys_nsig) +# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ +#else +# error "unable to find value for NSIG, please report" +/* to make it compile regardless, just remove the above line */ +# define EV_NSIG 65 +#endif + +#ifndef EV_USE_CLOCK_SYSCALL +# if __linux && __GLIBC__ >= 2 +# define EV_USE_CLOCK_SYSCALL 1 +# else +# define EV_USE_CLOCK_SYSCALL 0 +# endif +#endif + #ifndef EV_USE_MONOTONIC -# define EV_USE_MONOTONIC 0 +# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 +# define EV_USE_MONOTONIC 1 +# else +# define EV_USE_MONOTONIC 0 +# endif #endif #ifndef EV_USE_REALTIME -# define EV_USE_REALTIME 0 +# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL #endif #ifndef EV_USE_NANOSLEEP -# define EV_USE_NANOSLEEP 0 +# if _POSIX_C_SOURCE >= 199309L +# define EV_USE_NANOSLEEP 1 +# else +# define EV_USE_NANOSLEEP 0 +# endif #endif #ifndef EV_USE_SELECT @@ -237,8 +305,54 @@ # endif #endif +#ifndef EV_USE_SIGNALFD +# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) +# define EV_USE_SIGNALFD 1 +# else +# define EV_USE_SIGNALFD 0 +# endif +#endif + +#if 0 /* debugging */ +# define EV_VERIFY 3 +# define EV_USE_4HEAP 1 +# define EV_HEAP_CACHE_AT 1 +#endif + +#ifndef EV_VERIFY +# define EV_VERIFY !EV_MINIMAL +#endif + +#ifndef EV_USE_4HEAP +# define EV_USE_4HEAP !EV_MINIMAL +#endif + +#ifndef EV_HEAP_CACHE_AT +# define EV_HEAP_CACHE_AT !EV_MINIMAL +#endif + +/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ +/* which makes programs even slower. might work on other unices, too. */ +#if EV_USE_CLOCK_SYSCALL +# include +# ifdef SYS_clock_gettime +# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) +# undef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +# else +# undef EV_USE_CLOCK_SYSCALL +# define EV_USE_CLOCK_SYSCALL 0 +# endif +#endif + /* this block fixes any misconfiguration where we know we run into trouble otherwise */ +#ifdef _AIX +/* AIX has a completely broken poll.h header */ +# undef EV_USE_POLL +# define EV_USE_POLL 0 +#endif + #ifndef CLOCK_MONOTONIC # undef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 @@ -261,7 +375,14 @@ #endif #if EV_USE_INOTIFY +# include +# include # include +/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ +# ifndef IN_DONT_FOLLOW +# undef EV_USE_INOTIFY +# define EV_USE_INOTIFY 0 +# endif #endif #if EV_SELECT_IS_WINSOCKET @@ -271,17 +392,62 @@ #if EV_USE_EVENTFD /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ # include +# ifndef EFD_NONBLOCK +# define EFD_NONBLOCK O_NONBLOCK +# endif +# ifndef EFD_CLOEXEC +# ifdef O_CLOEXEC +# define EFD_CLOEXEC O_CLOEXEC +# else +# define EFD_CLOEXEC 02000000 +# endif +# endif # ifdef __cplusplus extern "C" { # endif -int eventfd (unsigned int initval, int flags); +int (eventfd) (unsigned int initval, int flags); +# ifdef __cplusplus +} +# endif +#endif + +#if EV_USE_SIGNALFD +/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ +# include +# ifndef SFD_NONBLOCK +# define SFD_NONBLOCK O_NONBLOCK +# endif +# ifndef SFD_CLOEXEC +# ifdef O_CLOEXEC +# define SFD_CLOEXEC O_CLOEXEC +# else +# define SFD_CLOEXEC 02000000 +# endif +# endif +# ifdef __cplusplus +extern "C" { +# endif +int signalfd (int fd, const sigset_t *mask, int flags); + +struct signalfd_siginfo +{ + uint32_t ssi_signo; + char pad[128 - sizeof (uint32_t)]; +}; # ifdef __cplusplus } # endif #endif + /**/ +#if EV_VERIFY >= 3 +# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) +#else +# define EV_FREQUENT_CHECK do { } while (0) +#endif + /* * This is used to avoid floating point rounding problems. * It is added to ev_rt_now when scheduling periodics @@ -294,7 +460,6 @@ #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 CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ #if __GNUC__ >= 4 # define expect(expr,value) __builtin_expect ((expr),(value)) @@ -302,7 +467,7 @@ #else # define expect(expr,value) (expr) # define noinline -# if __STDC_VERSION__ < 199901L +# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 # define inline # endif #endif @@ -317,8 +482,13 @@ # define inline_speed static inline #endif -#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) -#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) +#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) + +#if EV_MINPRI == EV_MAXPRI +# define ABSPRI(w) (((W)w), 0) +#else +# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) +#endif #define EMPTY /* required for microsofts broken pseudo-c compiler */ #define EMPTY2(a,b) /* used to suppress some warnings */ @@ -327,12 +497,29 @@ typedef ev_watcher_list *WL; typedef ev_watcher_time *WT; -#if EV_USE_MONOTONIC +#define ev_active(w) ((W)(w))->active +#define ev_at(w) ((WT)(w))->at + +#if EV_USE_REALTIME /* sig_atomic_t is used to avoid per-thread variables or locking but still */ /* giving it a reasonably high chance of working on typical architetcures */ +static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ +#endif + +#if EV_USE_MONOTONIC static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ #endif +#ifndef EV_FD_TO_WIN32_HANDLE +# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) +#endif +#ifndef EV_WIN32_HANDLE_TO_FD +# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) +#endif +#ifndef EV_WIN32_CLOSE_FD +# define EV_WIN32_CLOSE_FD(fd) close (fd) +#endif + #ifdef _WIN32 # include "ev_win32.c" #endif @@ -348,7 +535,7 @@ } static void noinline -syserr (const char *msg) +ev_syserr (const char *msg) { if (!msg) msg = "(libev) system error"; @@ -362,7 +549,22 @@ } } -static void *(*alloc)(void *ptr, long size); +static void * +ev_realloc_emul (void *ptr, long size) +{ + /* some systems, notably openbsd and darwin, fail to properly + * implement realloc (x, 0) (as required by both ansi c-98 and + * the single unix specification, so work around them here. + */ + + if (size) + return realloc (ptr, size); + + free (ptr); + return 0; +} + +static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; void ev_set_allocator (void *(*cb)(void *ptr, long size)) @@ -373,7 +575,7 @@ inline_speed void * ev_realloc (void *ptr, long size) { - ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); + ptr = alloc (ptr, size); if (!ptr && size) { @@ -389,29 +591,60 @@ /*****************************************************************************/ +/* set in reify when reification needed */ +#define EV_ANFD_REIFY 1 + +/* file descriptor info structure */ typedef struct { WL head; - unsigned char events; - unsigned char reify; + unsigned char events; /* the events watched for */ + unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ + unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ + unsigned char unused; +#if EV_USE_EPOLL + unsigned int egen; /* generation counter to counter epoll bugs */ +#endif #if EV_SELECT_IS_WINSOCKET SOCKET handle; #endif } ANFD; +/* stores the pending event set for a given watcher */ typedef struct { W w; - int events; + int events; /* the pending event set for the given watcher */ } ANPENDING; #if EV_USE_INOTIFY +/* hash table entry per inotify-id */ typedef struct { WL head; } ANFS; #endif +/* Heap Entry */ +#if EV_HEAP_CACHE_AT + /* a heap element */ + typedef struct { + ev_tstamp at; + WT w; + } ANHE; + + #define ANHE_w(he) (he).w /* access watcher, read-write */ + #define ANHE_at(he) (he).at /* access cached at, read-only */ + #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ +#else + /* a heap element */ + typedef WT ANHE; + + #define ANHE_w(he) (he) + #define ANHE_at(he) (he)->at + #define ANHE_at_cache(he) +#endif + #if EV_MULTIPLICITY struct ev_loop @@ -438,23 +671,40 @@ #endif +#if EV_MINIMAL < 2 +# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) +# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) +# define EV_INVOKE_PENDING invoke_cb (EV_A) +#else +# define EV_RELEASE_CB (void)0 +# define EV_ACQUIRE_CB (void)0 +# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) +#endif + +#define EVUNLOOP_RECURSE 0x80 + /*****************************************************************************/ +#ifndef EV_HAVE_EV_TIME ev_tstamp ev_time (void) { #if EV_USE_REALTIME - struct timespec ts; - clock_gettime (CLOCK_REALTIME, &ts); - return ts.tv_sec + ts.tv_nsec * 1e-9; -#else + if (expect_true (have_realtime)) + { + struct timespec ts; + clock_gettime (CLOCK_REALTIME, &ts); + return ts.tv_sec + ts.tv_nsec * 1e-9; + } +#endif + struct timeval tv; gettimeofday (&tv, 0); return tv.tv_sec + tv.tv_usec * 1e-6; -#endif } +#endif -ev_tstamp inline_size +inline_size ev_tstamp get_clock (void) { #if EV_USE_MONOTONIC @@ -497,6 +747,9 @@ tv.tv_sec = (time_t)delay; tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); + /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ + /* something not guaranteed by newer posix versions, but guaranteed */ + /* by older ones */ select (0, 0, 0, 0, &tv); #endif } @@ -504,7 +757,11 @@ /*****************************************************************************/ -int inline_size +#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ + +/* find a suitable new size for the given array, */ +/* hopefully by rounding to a ncie-to-malloc size */ +inline_size int array_nextsize (int elem, int cur, int cnt) { int ncur = cur + 1; @@ -513,11 +770,11 @@ ncur <<= 1; while (cnt > ncur); - /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ - if (elem * ncur > 4096) + /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ + if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) { ncur *= elem; - ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; + ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); ncur = ncur - sizeof (void *) * 4; ncur /= elem; } @@ -532,6 +789,9 @@ return ev_realloc (base, elem * *cur); } +#define array_init_zero(base,count) \ + memset ((void *)(base), 0, sizeof (*(base)) * (count)) + #define array_needsize(type,base,cur,cnt,init) \ if (expect_false ((cnt) > (cur))) \ { \ @@ -552,10 +812,16 @@ #endif #define array_free(stem, idx) \ - ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; + ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 /*****************************************************************************/ +/* dummy callback for pending events */ +static void noinline +pendingcb (EV_P_ ev_prepare *w, int revents) +{ +} + void noinline ev_feed_event (EV_P_ void *w, int revents) { @@ -573,7 +839,22 @@ } } -void inline_speed +inline_speed void +feed_reverse (EV_P_ W w) +{ + array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); + rfeeds [rfeedcnt++] = w; +} + +inline_size void +feed_reverse_done (EV_P_ int revents) +{ + do + ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); + while (rfeedcnt); +} + +inline_speed void queue_events (EV_P_ W *events, int eventcnt, int type) { int i; @@ -584,21 +865,8 @@ /*****************************************************************************/ -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) +inline_speed void +fd_event_nc (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; ev_io *w; @@ -612,14 +880,27 @@ } } +/* do not submit kernel events for fds that have reify set */ +/* because that means they changed while we were polling for new events */ +inline_speed void +fd_event (EV_P_ int fd, int revents) +{ + ANFD *anfd = anfds + fd; + + if (expect_true (!anfd->reify)) + fd_event_nc (EV_A_ fd, revents); +} + void ev_feed_fd_event (EV_P_ int fd, int revents) { if (fd >= 0 && fd < anfdmax) - fd_event (EV_A_ fd, revents); + fd_event_nc (EV_A_ fd, revents); } -void inline_size +/* make sure the external fd watch events are in-sync */ +/* with the kernel/libev internal state */ +inline_size void fd_reify (EV_P) { int i; @@ -638,13 +919,9 @@ #if EV_SELECT_IS_WINSOCKET if (events) { - unsigned long argp; - #ifdef EV_FD_TO_WIN32_HANDLE - anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); - #else - anfd->handle = _get_osfhandle (fd); - #endif - assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); + unsigned long arg; + anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); + assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); } #endif @@ -655,7 +932,7 @@ anfd->reify = 0; anfd->events = events; - if (o_events != events || o_reify & EV_IOFDSET) + if (o_events != events || o_reify & EV__IOFDSET) backend_modify (EV_A_ fd, o_events, events); } } @@ -663,7 +940,8 @@ fdchangecnt = 0; } -void inline_size +/* something about the given fd changed */ +inline_size void fd_change (EV_P_ int fd, int flags) { unsigned char reify = anfds [fd].reify; @@ -677,7 +955,8 @@ } } -void inline_speed +/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ +inline_speed void fd_kill (EV_P_ int fd) { ev_io *w; @@ -689,11 +968,12 @@ } } -int inline_size +/* check whether the given fd is atcually valid, for error recovery */ +inline_size int fd_valid (int fd) { #ifdef _WIN32 - return _get_osfhandle (fd) != -1; + return EV_FD_TO_WIN32_HANDLE (fd) != -1; #else return fcntl (fd, F_GETFD) != -1; #endif @@ -707,7 +987,7 @@ for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) - if (!fd_valid (fd) == -1 && errno == EBADF) + if (!fd_valid (fd) && errno == EBADF) fd_kill (EV_A_ fd); } @@ -721,7 +1001,7 @@ if (anfds [fd].events) { fd_kill (EV_A_ fd); - return; + break; } } @@ -735,101 +1015,180 @@ if (anfds [fd].events) { anfds [fd].events = 0; - fd_change (EV_A_ fd, EV_IOFDSET | 1); + anfds [fd].emask = 0; + fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); } } /*****************************************************************************/ -void inline_speed -upheap (WT *heap, int k) +/* + * the heap functions want a real array index. array index 0 uis guaranteed to not + * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives + * the branching factor of the d-tree. + */ + +/* + * at the moment we allow libev the luxury of two heaps, + * a small-code-size 2-heap one and a ~1.5kb larger 4-heap + * which is more cache-efficient. + * the difference is about 5% with 50000+ watchers. + */ +#if EV_USE_4HEAP + +#define DHEAP 4 +#define HEAP0 (DHEAP - 1) /* index of first element in heap */ +#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) +#define UPHEAP_DONE(p,k) ((p) == (k)) + +/* away from the root */ +inline_speed void +downheap (ANHE *heap, int N, int k) { - WT w = heap [k]; + ANHE he = heap [k]; + ANHE *E = heap + N + HEAP0; - while (k) + for (;;) { - int p = (k - 1) >> 1; + ev_tstamp minat; + ANHE *minpos; + ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; + + /* find minimum child */ + if (expect_true (pos + DHEAP - 1 < E)) + { + /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); + if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); + if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); + if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); + } + else if (pos < E) + { + /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); + if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); + if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); + if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); + } + else + break; - if (heap [p]->at <= w->at) + if (ANHE_at (he) <= minat) break; - heap [k] = heap [p]; - ((W)heap [k])->active = k + 1; - k = p; + heap [k] = *minpos; + ev_active (ANHE_w (*minpos)) = k; + + k = minpos - heap; } - heap [k] = w; - ((W)heap [k])->active = k + 1; + heap [k] = he; + ev_active (ANHE_w (he)) = k; } -void inline_speed -downheap (WT *heap, int N, int k) +#else /* 4HEAP */ + +#define HEAP0 1 +#define HPARENT(k) ((k) >> 1) +#define UPHEAP_DONE(p,k) (!(p)) + +/* away from the root */ +inline_speed void +downheap (ANHE *heap, int N, int k) { - WT w = heap [k]; + ANHE he = heap [k]; for (;;) { - int c = (k << 1) + 1; + int c = k << 1; - if (c >= N) + if (c >= N + HEAP0) break; - c += c + 1 < N && heap [c]->at > heap [c + 1]->at + c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) ? 1 : 0; - if (w->at <= heap [c]->at) + if (ANHE_at (he) <= ANHE_at (heap [c])) break; heap [k] = heap [c]; - ((W)heap [k])->active = k + 1; - + ev_active (ANHE_w (heap [k])) = k; + k = c; } - heap [k] = w; - ((W)heap [k])->active = k + 1; + heap [k] = he; + ev_active (ANHE_w (he)) = k; } +#endif -void inline_size -adjustheap (WT *heap, int N, int k) +/* towards the root */ +inline_speed void +upheap (ANHE *heap, int k) { - upheap (heap, k); - downheap (heap, N, k); + ANHE he = heap [k]; + + for (;;) + { + int p = HPARENT (k); + + if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) + break; + + heap [k] = heap [p]; + ev_active (ANHE_w (heap [k])) = k; + k = p; + } + + heap [k] = he; + ev_active (ANHE_w (he)) = k; } -/*****************************************************************************/ +/* move an element suitably so it is in a correct place */ +inline_size void +adjustheap (ANHE *heap, int N, int k) +{ + if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) + upheap (heap, k); + else + downheap (heap, N, k); +} -typedef struct +/* rebuild the heap: this function is used only once and executed rarely */ +inline_size void +reheap (ANHE *heap, int N) { - WL head; - EV_ATOMIC_T gotsig; -} ANSIG; + int i; -static ANSIG *signals; -static int signalmax; + /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ + /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ + for (i = 0; i < N; ++i) + upheap (heap, i + HEAP0); +} -static EV_ATOMIC_T gotsig; +/*****************************************************************************/ -void inline_size -signals_init (ANSIG *base, int count) +/* associate signal watchers to a signal signal */ +typedef struct { - while (count--) - { - base->head = 0; - base->gotsig = 0; + EV_ATOMIC_T pending; +#if EV_MULTIPLICITY + EV_P; +#endif + WL head; +} ANSIG; - ++base; - } -} +static ANSIG signals [EV_NSIG - 1]; /*****************************************************************************/ -void inline_speed +/* used to prepare libev internal fd's */ +/* this is not fork-safe */ +inline_speed void fd_intern (int fd) { #ifdef _WIN32 - int arg = 1; - ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); + unsigned long arg = 1; + ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); #else fcntl (fd, F_SETFD, FD_CLOEXEC); fcntl (fd, F_SETFL, O_NONBLOCK); @@ -839,32 +1198,36 @@ static void noinline evpipe_init (EV_P) { - if (!ev_is_active (&pipeev)) + if (!ev_is_active (&pipe_w)) { #if EV_USE_EVENTFD - if ((evfd = eventfd (0, 0)) >= 0) + evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); + if (evfd < 0 && errno == EINVAL) + evfd = eventfd (0, 0); + + if (evfd >= 0) { evpipe [0] = -1; - fd_intern (evfd); - ev_io_set (&pipeev, evfd, EV_READ); + fd_intern (evfd); /* doing it twice doesn't hurt */ + ev_io_set (&pipe_w, evfd, EV_READ); } else #endif { while (pipe (evpipe)) - syserr ("(libev) error creating signal/async pipe"); + ev_syserr ("(libev) error creating signal/async pipe"); fd_intern (evpipe [0]); fd_intern (evpipe [1]); - ev_io_set (&pipeev, evpipe [0], EV_READ); + ev_io_set (&pipe_w, evpipe [0], EV_READ); } - ev_io_start (EV_A_ &pipeev); + ev_io_start (EV_A_ &pipe_w); ev_unref (EV_A); /* watcher should not keep loop alive */ } } -void inline_size +inline_size void evpipe_write (EV_P_ EV_ATOMIC_T *flag) { if (!*flag) @@ -887,13 +1250,17 @@ } } +/* called whenever the libev signal pipe */ +/* got some events (signal, async) */ static void pipecb (EV_P_ ev_io *iow, int revents) { + int i; + #if EV_USE_EVENTFD if (evfd >= 0) { - uint64_t counter = 1; + uint64_t counter; read (evfd, &counter, sizeof (uint64_t)); } else @@ -903,21 +1270,19 @@ read (evpipe [0], &dummy, 1); } - if (gotsig && ev_is_default_loop (EV_A)) + if (sig_pending) { - int signum; - gotsig = 0; + sig_pending = 0; - for (signum = signalmax; signum--; ) - if (signals [signum].gotsig) - ev_feed_signal_event (EV_A_ signum + 1); + for (i = EV_NSIG - 1; i--; ) + if (expect_false (signals [i].pending)) + ev_feed_signal_event (EV_A_ i + 1); } #if EV_ASYNC_ENABLE - if (gotasync) + if (async_pending) { - int i; - gotasync = 0; + async_pending = 0; for (i = asynccnt; i--; ) if (asyncs [i]->sent) @@ -935,15 +1300,15 @@ ev_sighandler (int signum) { #if EV_MULTIPLICITY - struct ev_loop *loop = &default_loop_struct; + EV_P = signals [signum - 1].loop; #endif -#if _WIN32 +#ifdef _WIN32 signal (signum, ev_sighandler); #endif - signals [signum - 1].gotsig = 1; - evpipe_write (EV_A_ &gotsig); + signals [signum - 1].pending = 1; + evpipe_write (EV_A_ &sig_pending); } void noinline @@ -951,21 +1316,45 @@ { WL w; -#if EV_MULTIPLICITY - assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); -#endif + if (expect_false (signum <= 0 || signum > EV_NSIG)) + return; --signum; - if (signum < 0 || signum >= signalmax) +#if EV_MULTIPLICITY + /* it is permissible to try to feed a signal to the wrong loop */ + /* or, likely more useful, feeding a signal nobody is waiting for */ + + if (expect_false (signals [signum].loop != EV_A)) return; +#endif - signals [signum].gotsig = 0; + signals [signum].pending = 0; for (w = signals [signum].head; w; w = w->next) ev_feed_event (EV_A_ (W)w, EV_SIGNAL); } +#if EV_USE_SIGNALFD +static void +sigfdcb (EV_P_ ev_io *iow, int revents) +{ + struct signalfd_siginfo si[2], *sip; /* these structs are big */ + + for (;;) + { + ssize_t res = read (sigfd, si, sizeof (si)); + + /* not ISO-C, as res might be -1, but works with SuS */ + for (sip = si; (char *)sip < (char *)si + res; ++sip) + ev_feed_signal_event (EV_A_ sip->ssi_signo); + + if (res < (ssize_t)sizeof (si)) + break; + } +} +#endif + /*****************************************************************************/ static WL childs [EV_PID_HASHSIZE]; @@ -978,7 +1367,8 @@ # define WIFCONTINUED(status) 0 #endif -void inline_speed +/* handle a single child status event */ +inline_speed void child_reap (EV_P_ int chain, int pid, int status) { ev_child *w; @@ -1001,6 +1391,7 @@ # define WCONTINUED 0 #endif +/* called on sigchld etc., calls waitpid */ static void childcb (EV_P_ ev_signal *sw, int revents) { @@ -1091,8 +1482,9 @@ flags &= ~EVBACKEND_KQUEUE; #endif #ifdef __APPLE__ - // flags &= ~EVBACKEND_KQUEUE; for documentation - flags &= ~EVBACKEND_POLL; + /* only select works correctly on that "unix-certified" platform */ + flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ + flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ #endif return flags; @@ -1116,12 +1508,19 @@ return backend; } +#if EV_MINIMAL < 2 unsigned int ev_loop_count (EV_P) { return loop_count; } +unsigned int +ev_loop_depth (EV_P) +{ + return loop_depth; +} + void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) { @@ -1134,31 +1533,54 @@ timeout_blocktime = interval; } +void +ev_set_userdata (EV_P_ void *data) +{ + userdata = data; +} + +void * +ev_userdata (EV_P) +{ + return userdata; +} + +void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) +{ + invoke_cb = invoke_pending_cb; +} + +void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) +{ + release_cb = release; + acquire_cb = acquire; +} +#endif + +/* initialise a loop structure, must be zero-initialised */ static void noinline loop_init (EV_P_ unsigned int flags) { if (!backend) { -#if EV_USE_MONOTONIC - { - struct timespec ts; - if (!clock_gettime (CLOCK_MONOTONIC, &ts)) - have_monotonic = 1; - } +#if EV_USE_REALTIME + if (!have_realtime) + { + struct timespec ts; + + if (!clock_gettime (CLOCK_REALTIME, &ts)) + have_realtime = 1; + } #endif - ev_rt_now = ev_time (); - mn_now = get_clock (); - now_floor = mn_now; - rtmn_diff = ev_rt_now - mn_now; +#if EV_USE_MONOTONIC + if (!have_monotonic) + { + struct timespec ts; - io_blocktime = 0.; - timeout_blocktime = 0.; - backend = 0; - backend_fd = -1; - gotasync = 0; -#if EV_USE_INOTIFY - fs_fd = -2; + if (!clock_gettime (CLOCK_MONOTONIC, &ts)) + have_monotonic = 1; + } #endif /* pid check not overridable via env */ @@ -1172,7 +1594,30 @@ && getenv ("LIBEV_FLAGS")) flags = atoi (getenv ("LIBEV_FLAGS")); - if (!(flags & 0x0000ffffUL)) + ev_rt_now = ev_time (); + mn_now = get_clock (); + now_floor = mn_now; + rtmn_diff = ev_rt_now - mn_now; +#if EV_MINIMAL < 2 + invoke_cb = ev_invoke_pending; +#endif + + io_blocktime = 0.; + timeout_blocktime = 0.; + backend = 0; + backend_fd = -1; + sig_pending = 0; +#if EV_ASYNC_ENABLE + async_pending = 0; +#endif +#if EV_USE_INOTIFY + fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; +#endif +#if EV_USE_SIGNALFD + sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; +#endif + + if (!(flags & 0x0000ffffU)) flags |= ev_recommended_backends (); #if EV_USE_PORT @@ -1191,20 +1636,23 @@ if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); #endif - ev_init (&pipeev, pipecb); - ev_set_priority (&pipeev, EV_MAXPRI); + ev_prepare_init (&pending_w, pendingcb); + + ev_init (&pipe_w, pipecb); + ev_set_priority (&pipe_w, EV_MAXPRI); } } +/* free up a loop structure */ static void noinline loop_destroy (EV_P) { int i; - if (ev_is_active (&pipeev)) + if (ev_is_active (&pipe_w)) { - ev_ref (EV_A); /* signal watcher */ - ev_io_stop (EV_A_ &pipeev); + /*ev_ref (EV_A);*/ + /*ev_io_stop (EV_A_ &pipe_w);*/ #if EV_USE_EVENTFD if (evfd >= 0) @@ -1213,11 +1661,16 @@ if (evpipe [0] >= 0) { - close (evpipe [0]); - close (evpipe [1]); + EV_WIN32_CLOSE_FD (evpipe [0]); + EV_WIN32_CLOSE_FD (evpipe [1]); } } +#if EV_USE_SIGNALFD + if (ev_is_active (&sigfd_w)) + close (sigfd); +#endif + #if EV_USE_INOTIFY if (fs_fd >= 0) close (fs_fd); @@ -1250,9 +1703,10 @@ #endif } - ev_free (anfds); anfdmax = 0; + ev_free (anfds); anfds = 0; anfdmax = 0; /* have to use the microsoft-never-gets-it-right macro */ + array_free (rfeed, EMPTY); array_free (fdchange, EMPTY); array_free (timer, EMPTY); #if EV_PERIODIC_ENABLE @@ -1270,9 +1724,11 @@ backend = 0; } -void inline_size infy_fork (EV_P); +#if EV_USE_INOTIFY +inline_size void infy_fork (EV_P); +#endif -void inline_size +inline_size void loop_fork (EV_P) { #if EV_USE_PORT @@ -1288,17 +1744,17 @@ infy_fork (EV_A); #endif - if (ev_is_active (&pipeev)) + if (ev_is_active (&pipe_w)) { /* this "locks" the handlers against writing to the pipe */ /* while we modify the fd vars */ - gotsig = 1; + sig_pending = 1; #if EV_ASYNC_ENABLE - gotasync = 1; + async_pending = 1; #endif ev_ref (EV_A); - ev_io_stop (EV_A_ &pipeev); + ev_io_stop (EV_A_ &pipe_w); #if EV_USE_EVENTFD if (evfd >= 0) @@ -1307,30 +1763,30 @@ if (evpipe [0] >= 0) { - close (evpipe [0]); - close (evpipe [1]); + EV_WIN32_CLOSE_FD (evpipe [0]); + EV_WIN32_CLOSE_FD (evpipe [1]); } evpipe_init (EV_A); /* now iterate over everything, in case we missed something */ - pipecb (EV_A_ &pipeev, EV_READ); + pipecb (EV_A_ &pipe_w, EV_READ); } postfork = 0; } #if EV_MULTIPLICITY + struct ev_loop * ev_loop_new (unsigned int flags) { - struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); - - memset (loop, 0, sizeof (struct ev_loop)); + EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); + memset (EV_A, 0, sizeof (struct ev_loop)); loop_init (EV_A_ flags); if (ev_backend (EV_A)) - return loop; + return EV_A; return 0; } @@ -1347,7 +1803,107 @@ { postfork = 1; /* must be in line with ev_default_fork */ } +#endif /* multiplicity */ + +#if EV_VERIFY +static void noinline +verify_watcher (EV_P_ W w) +{ + assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); + + if (w->pending) + assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); +} + +static void noinline +verify_heap (EV_P_ ANHE *heap, int N) +{ + int i; + + for (i = HEAP0; i < N + HEAP0; ++i) + { + assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); + assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); + assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); + + verify_watcher (EV_A_ (W)ANHE_w (heap [i])); + } +} + +static void noinline +array_verify (EV_P_ W *ws, int cnt) +{ + while (cnt--) + { + assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); + verify_watcher (EV_A_ ws [cnt]); + } +} +#endif + +#if EV_MINIMAL < 2 +void +ev_loop_verify (EV_P) +{ +#if EV_VERIFY + int i; + WL w; + + assert (activecnt >= -1); + + assert (fdchangemax >= fdchangecnt); + for (i = 0; i < fdchangecnt; ++i) + assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); + assert (anfdmax >= 0); + for (i = 0; i < anfdmax; ++i) + for (w = anfds [i].head; w; w = w->next) + { + verify_watcher (EV_A_ (W)w); + assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); + assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); + } + + assert (timermax >= timercnt); + verify_heap (EV_A_ timers, timercnt); + +#if EV_PERIODIC_ENABLE + assert (periodicmax >= periodiccnt); + verify_heap (EV_A_ periodics, periodiccnt); +#endif + + for (i = NUMPRI; i--; ) + { + assert (pendingmax [i] >= pendingcnt [i]); +#if EV_IDLE_ENABLE + assert (idleall >= 0); + assert (idlemax [i] >= idlecnt [i]); + array_verify (EV_A_ (W *)idles [i], idlecnt [i]); +#endif + } + +#if EV_FORK_ENABLE + assert (forkmax >= forkcnt); + array_verify (EV_A_ (W *)forks, forkcnt); +#endif + +#if EV_ASYNC_ENABLE + assert (asyncmax >= asynccnt); + array_verify (EV_A_ (W *)asyncs, asynccnt); +#endif + + assert (preparemax >= preparecnt); + array_verify (EV_A_ (W *)prepares, preparecnt); + + assert (checkmax >= checkcnt); + array_verify (EV_A_ (W *)checks, checkcnt); + +# if 0 + for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) + for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) +# endif +#endif +} #endif #if EV_MULTIPLICITY @@ -1361,7 +1917,7 @@ if (!ev_default_loop_ptr) { #if EV_MULTIPLICITY - struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; + EV_P = ev_default_loop_ptr = &default_loop_struct; #else ev_default_loop_ptr = 1; #endif @@ -1388,9 +1944,11 @@ ev_default_destroy (void) { #if EV_MULTIPLICITY - struct ev_loop *loop = ev_default_loop_ptr; + EV_P = ev_default_loop_ptr; #endif + ev_default_loop_ptr = 0; + #ifndef _WIN32 ev_ref (EV_A); /* child watcher */ ev_signal_stop (EV_A_ &childev); @@ -1403,11 +1961,10 @@ ev_default_fork (void) { #if EV_MULTIPLICITY - struct ev_loop *loop = ev_default_loop_ptr; + EV_P = ev_default_loop_ptr; #endif - if (backend) - postfork = 1; /* must be in line with ev_loop_fork */ + postfork = 1; /* must be in line with ev_loop_fork */ } /*****************************************************************************/ @@ -1418,8 +1975,20 @@ EV_CB_INVOKE ((W)w, revents); } -void inline_speed -call_pending (EV_P) +unsigned int +ev_pending_count (EV_P) +{ + int pri; + unsigned int count = 0; + + for (pri = NUMPRI; pri--; ) + count += pendingcnt [pri]; + + return count; +} + +void noinline +ev_invoke_pending (EV_P) { int pri; @@ -1428,127 +1997,183 @@ { ANPENDING *p = pendings [pri] + --pendingcnt [pri]; - if (expect_true (p->w)) - { - /*assert (("non-pending watcher on pending list", p->w->pending));*/ + /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ + /* ^ this is no longer true, as pending_w could be here */ - p->w->pending = 0; - EV_CB_INVOKE (p->w, p->events); - } + p->w->pending = 0; + EV_CB_INVOKE (p->w, p->events); + EV_FREQUENT_CHECK; } } -void inline_size -timers_reify (EV_P) +#if EV_IDLE_ENABLE +/* make idle watchers pending. this handles the "call-idle */ +/* only when higher priorities are idle" logic */ +inline_size void +idle_reify (EV_P) { - while (timercnt && ((WT)timers [0])->at <= mn_now) + if (expect_false (idleall)) { - ev_timer *w = (ev_timer *)timers [0]; + int pri; - /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ + for (pri = NUMPRI; pri--; ) + { + if (pendingcnt [pri]) + break; - /* first reschedule or stop timer */ - if (w->repeat) + if (idlecnt [pri]) + { + queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); + break; + } + } + } +} +#endif + +/* make timers pending */ +inline_size void +timers_reify (EV_P) +{ + EV_FREQUENT_CHECK; + + if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) + { + do { - assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); + ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); + + /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ + + /* first reschedule or stop timer */ + if (w->repeat) + { + ev_at (w) += w->repeat; + if (ev_at (w) < mn_now) + ev_at (w) = mn_now; - ((WT)w)->at += w->repeat; - if (((WT)w)->at < mn_now) - ((WT)w)->at = mn_now; + assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); - downheap (timers, timercnt, 0); + ANHE_at_cache (timers [HEAP0]); + downheap (timers, timercnt, HEAP0); + } + else + ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ + + EV_FREQUENT_CHECK; + feed_reverse (EV_A_ (W)w); } - else - ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ + while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); - ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); + feed_reverse_done (EV_A_ EV_TIMEOUT); } } #if EV_PERIODIC_ENABLE -void inline_size +/* make periodics pending */ +inline_size void periodics_reify (EV_P) { - while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) - { - ev_periodic *w = (ev_periodic *)periodics [0]; + EV_FREQUENT_CHECK; - /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ + while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) + { + int feed_count = 0; - /* first reschedule or stop timer */ - if (w->reschedule_cb) + do { - ((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 (periodics, periodiccnt, 0); - } - else if (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 (periodics, periodiccnt, 0); + ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); + + /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ + + /* first reschedule or stop timer */ + if (w->reschedule_cb) + { + ev_at (w) = w->reschedule_cb (w, ev_rt_now); + + assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); + + ANHE_at_cache (periodics [HEAP0]); + downheap (periodics, periodiccnt, HEAP0); + } + else if (w->interval) + { + ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; + /* if next trigger time is not sufficiently in the future, put it there */ + /* this might happen because of floating point inexactness */ + if (ev_at (w) - ev_rt_now < TIME_EPSILON) + { + ev_at (w) += w->interval; + + /* if interval is unreasonably low we might still have a time in the past */ + /* so correct this. this will make the periodic very inexact, but the user */ + /* has effectively asked to get triggered more often than possible */ + if (ev_at (w) < ev_rt_now) + ev_at (w) = ev_rt_now; + } + + ANHE_at_cache (periodics [HEAP0]); + downheap (periodics, periodiccnt, HEAP0); + } + else + ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ + + EV_FREQUENT_CHECK; + feed_reverse (EV_A_ (W)w); } - else - ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ + while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); - ev_feed_event (EV_A_ (W)w, EV_PERIODIC); + feed_reverse_done (EV_A_ EV_PERIODIC); } } +/* simply recalculate all periodics */ +/* TODO: maybe ensure that at leats one event happens when jumping forward? */ static void noinline periodics_reschedule (EV_P) { int i; /* adjust periodics after time jump */ - for (i = 0; i < periodiccnt; ++i) + for (i = HEAP0; i < periodiccnt + HEAP0; ++i) { - ev_periodic *w = (ev_periodic *)periodics [i]; + ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); if (w->reschedule_cb) - ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); + ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) - ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; + ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; + + ANHE_at_cache (periodics [i]); } - /* now rebuild the heap */ - for (i = periodiccnt >> 1; i--; ) - downheap (periodics, periodiccnt, i); + reheap (periodics, periodiccnt); } #endif -#if EV_IDLE_ENABLE -void inline_size -idle_reify (EV_P) +/* adjust all timers by a given offset */ +static void noinline +timers_reschedule (EV_P_ ev_tstamp adjust) { - if (expect_false (idleall)) - { - int pri; - - for (pri = NUMPRI; pri--; ) - { - if (pendingcnt [pri]) - break; + int i; - if (idlecnt [pri]) - { - queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); - break; - } - } + for (i = 0; i < timercnt; ++i) + { + ANHE *he = timers + i + HEAP0; + ANHE_w (*he)->at += adjust; + ANHE_at_cache (*he); } } -#endif -void inline_speed +/* fetch new monotonic and realtime times from the kernel */ +/* also detect if there was a timejump, and act accordingly */ +inline_speed void time_update (EV_P_ ev_tstamp max_block) { - int i; - #if EV_USE_MONOTONIC if (expect_true (have_monotonic)) { + int i; ev_tstamp odiff = rtmn_diff; mn_now = get_clock (); @@ -1576,7 +2201,7 @@ { rtmn_diff = ev_rt_now - mn_now; - if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) + if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) return; /* all is well */ ev_rt_now = ev_time (); @@ -1584,11 +2209,11 @@ now_floor = mn_now; } + /* no timer adjustment, as the monotonic clock doesn't jump */ + /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ # 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 @@ -1597,12 +2222,11 @@ if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) { + /* adjust timers. this is easy, as the offset is the same for all of them */ + timers_reschedule (EV_A_ ev_rt_now - mn_now); #if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); #endif - /* 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; } mn_now = ev_rt_now; @@ -1610,28 +2234,24 @@ } void -ev_ref (EV_P) -{ - ++activecnt; -} - -void -ev_unref (EV_P) +ev_loop (EV_P_ int flags) { - --activecnt; -} +#if EV_MINIMAL < 2 + ++loop_depth; +#endif -static int loop_done; + assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); -void -ev_loop (EV_P_ int flags) -{ loop_done = EVUNLOOP_CANCEL; - call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ + EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ do { +#if EV_VERIFY >= 2 + ev_loop_verify (EV_A); +#endif + #ifndef _WIN32 if (expect_false (curpid)) /* penalise the forking check even more */ if (expect_false (getpid () != curpid)) @@ -1647,7 +2267,7 @@ if (forkcnt) { queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); - call_pending (EV_A); + EV_INVOKE_PENDING; } #endif @@ -1655,10 +2275,10 @@ if (expect_false (preparecnt)) { queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); - call_pending (EV_A); + EV_INVOKE_PENDING; } - if (expect_false (!activecnt)) + if (expect_false (loop_done)) break; /* we might have forked, so reify kernel state if necessary */ @@ -1675,6 +2295,9 @@ if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) { + /* remember old timestamp for io_blocktime calculation */ + ev_tstamp prev_mn_now = mn_now; + /* update time to cancel out callback processing overhead */ time_update (EV_A_ 1e100); @@ -1682,35 +2305,44 @@ if (timercnt) { - ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; + ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; if (waittime > to) waittime = to; } #if EV_PERIODIC_ENABLE if (periodiccnt) { - ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; + ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; if (waittime > to) waittime = to; } #endif + /* don't let timeouts decrease the waittime below timeout_blocktime */ if (expect_false (waittime < timeout_blocktime)) waittime = timeout_blocktime; - sleeptime = waittime - backend_fudge; + /* extra check because io_blocktime is commonly 0 */ + if (expect_false (io_blocktime)) + { + sleeptime = io_blocktime - (mn_now - prev_mn_now); - if (expect_true (sleeptime > io_blocktime)) - sleeptime = io_blocktime; + if (sleeptime > waittime - backend_fudge) + sleeptime = waittime - backend_fudge; - if (sleeptime) - { - ev_sleep (sleeptime); - waittime -= sleeptime; + if (expect_true (sleeptime > 0.)) + { + ev_sleep (sleeptime); + waittime -= sleeptime; + } } } +#if EV_MINIMAL < 2 ++loop_count; +#endif + assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ backend_poll (EV_A_ waittime); + assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ /* update ev_rt_now, do magic */ time_update (EV_A_ waittime + sleeptime); @@ -1731,7 +2363,7 @@ if (expect_false (checkcnt)) queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); - call_pending (EV_A); + EV_INVOKE_PENDING; } while (expect_true ( activecnt @@ -1741,6 +2373,10 @@ if (loop_done == EVUNLOOP_ONE) loop_done = EVUNLOOP_CANCEL; + +#if EV_MINIMAL < 2 + --loop_depth; +#endif } void @@ -1749,36 +2385,75 @@ loop_done = how; } +void +ev_ref (EV_P) +{ + ++activecnt; +} + +void +ev_unref (EV_P) +{ + --activecnt; +} + +void +ev_now_update (EV_P) +{ + time_update (EV_A_ 1e100); +} + +void +ev_suspend (EV_P) +{ + ev_now_update (EV_A); +} + +void +ev_resume (EV_P) +{ + ev_tstamp mn_prev = mn_now; + + ev_now_update (EV_A); + timers_reschedule (EV_A_ mn_now - mn_prev); +#if EV_PERIODIC_ENABLE + /* TODO: really do this? */ + periodics_reschedule (EV_A); +#endif +} + /*****************************************************************************/ +/* singly-linked list management, used when the expected list length is short */ -void inline_size +inline_size void wlist_add (WL *head, WL elem) { elem->next = *head; *head = elem; } -void inline_size +inline_size void wlist_del (WL *head, WL elem) { while (*head) { - if (*head == elem) + if (expect_true (*head == elem)) { *head = elem->next; - return; + break; } head = &(*head)->next; } } -void inline_speed +/* internal, faster, version of ev_clear_pending */ +inline_speed void clear_pending (EV_P_ W w) { if (w->pending) { - pendings [ABSPRI (w)][w->pending - 1].w = 0; + pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; w->pending = 0; } } @@ -1792,24 +2467,24 @@ if (expect_true (pending)) { ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; + p->w = (W)&pending_w; w_->pending = 0; - p->w = 0; return p->events; } else return 0; } -void inline_size +inline_size void pri_adjust (EV_P_ W w) { - int pri = w->priority; + int pri = ev_priority (w); pri = pri < EV_MINPRI ? EV_MINPRI : pri; pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; - w->priority = pri; + ev_set_priority (w, pri); } -void inline_speed +inline_speed void ev_start (EV_P_ W w, int active) { pri_adjust (EV_A_ w); @@ -1817,7 +2492,7 @@ ev_ref (EV_A); } -void inline_size +inline_size void ev_stop (EV_P_ W w) { ev_unref (EV_A); @@ -1834,14 +2509,19 @@ if (expect_false (ev_is_active (w))) return; - assert (("ev_io_start called with negative fd", fd >= 0)); + assert (("libev: ev_io_start called with negative fd", fd >= 0)); + assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); + + EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); - array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); + array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); wlist_add (&anfds[fd].head, (WL)w); - fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); - w->events &= ~EV_IOFDSET; + fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); + w->events &= ~EV__IOFDSET; + + EV_FREQUENT_CHECK; } void noinline @@ -1851,12 +2531,16 @@ if (expect_false (!ev_is_active (w))) return; - assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); + assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); + + EV_FREQUENT_CHECK; wlist_del (&anfds[w->fd].head, (WL)w); ev_stop (EV_A_ (W)w); fd_change (EV_A_ w->fd, 1); + + EV_FREQUENT_CHECK; } void noinline @@ -1865,16 +2549,22 @@ if (expect_false (ev_is_active (w))) return; - ((WT)w)->at += mn_now; + ev_at (w) += mn_now; + + assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); + + EV_FREQUENT_CHECK; - assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); + ++timercnt; + ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); + array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); + ANHE_w (timers [ev_active (w)]) = (WT)w; + ANHE_at_cache (timers [ev_active (w)]); + upheap (timers, ev_active (w)); - ev_start (EV_A_ (W)w, ++timercnt); - array_needsize (WT, timers, timermax, timercnt, EMPTY2); - timers [timercnt - 1] = (WT)w; - upheap (timers, timercnt - 1); + EV_FREQUENT_CHECK; - /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ + /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ } void noinline @@ -1884,41 +2574,58 @@ if (expect_false (!ev_is_active (w))) return; - assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); + EV_FREQUENT_CHECK; { - int active = ((W)w)->active; + int active = ev_active (w); - if (expect_true (--active < --timercnt)) + assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); + + --timercnt; + + if (expect_true (active < timercnt + HEAP0)) { - timers [active] = timers [timercnt]; + timers [active] = timers [timercnt + HEAP0]; adjustheap (timers, timercnt, active); } } - ((WT)w)->at -= mn_now; + ev_at (w) -= mn_now; ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } void noinline ev_timer_again (EV_P_ ev_timer *w) { + EV_FREQUENT_CHECK; + if (ev_is_active (w)) { if (w->repeat) { - ((WT)w)->at = mn_now + w->repeat; - adjustheap (timers, timercnt, ((W)w)->active - 1); + ev_at (w) = mn_now + w->repeat; + ANHE_at_cache (timers [ev_active (w)]); + adjustheap (timers, timercnt, ev_active (w)); } else ev_timer_stop (EV_A_ w); } else if (w->repeat) { - w->at = w->repeat; + ev_at (w) = w->repeat; ev_timer_start (EV_A_ w); } + + EV_FREQUENT_CHECK; +} + +ev_tstamp +ev_timer_remaining (EV_P_ ev_timer *w) +{ + return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); } #if EV_PERIODIC_ENABLE @@ -1929,22 +2636,28 @@ return; if (w->reschedule_cb) - ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); + ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) { - assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); + assert (("libev: 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 = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; + ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; } else - ((WT)w)->at = w->offset; + ev_at (w) = w->offset; + + EV_FREQUENT_CHECK; - ev_start (EV_A_ (W)w, ++periodiccnt); - array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); - periodics [periodiccnt - 1] = (WT)w; - upheap (periodics, periodiccnt - 1); + ++periodiccnt; + ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); + array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); + ANHE_w (periodics [ev_active (w)]) = (WT)w; + ANHE_at_cache (periodics [ev_active (w)]); + upheap (periodics, ev_active (w)); - /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ + EV_FREQUENT_CHECK; + + /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ } void noinline @@ -1954,19 +2667,25 @@ if (expect_false (!ev_is_active (w))) return; - assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); + EV_FREQUENT_CHECK; { - int active = ((W)w)->active; + int active = ev_active (w); + + assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); + + --periodiccnt; - if (expect_true (--active < --periodiccnt)) + if (expect_true (active < periodiccnt + HEAP0)) { - periodics [active] = periodics [periodiccnt]; + periodics [active] = periodics [periodiccnt + HEAP0]; adjustheap (periodics, periodiccnt, active); } } ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } void noinline @@ -1985,45 +2704,79 @@ 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)); + assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); - evpipe_init (EV_A); +#if EV_MULTIPLICITY + assert (("libev: a signal must not be attached to two different loops", + !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); - { -#ifndef _WIN32 - sigset_t full, prev; - sigfillset (&full); - sigprocmask (SIG_SETMASK, &full, &prev); + signals [w->signum - 1].loop = EV_A; #endif - array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); + EV_FREQUENT_CHECK; -#ifndef _WIN32 - sigprocmask (SIG_SETMASK, &prev, 0); +#if EV_USE_SIGNALFD + if (sigfd == -2) + { + sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); + if (sigfd < 0 && errno == EINVAL) + sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ + + if (sigfd >= 0) + { + fd_intern (sigfd); /* doing it twice will not hurt */ + + sigemptyset (&sigfd_set); + + ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); + ev_set_priority (&sigfd_w, EV_MAXPRI); + ev_io_start (EV_A_ &sigfd_w); + ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ + } + } + + if (sigfd >= 0) + { + /* TODO: check .head */ + sigaddset (&sigfd_set, w->signum); + sigprocmask (SIG_BLOCK, &sigfd_set, 0); + + signalfd (sigfd, &sigfd_set, 0); + } #endif - } ev_start (EV_A_ (W)w, 1); wlist_add (&signals [w->signum - 1].head, (WL)w); if (!((WL)w)->next) - { -#if _WIN32 - signal (w->signum, ev_sighandler); -#else - struct sigaction sa; - sa.sa_handler = ev_sighandler; - sigfillset (&sa.sa_mask); - sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ - sigaction (w->signum, &sa, 0); +# if EV_USE_SIGNALFD + if (sigfd < 0) /*TODO*/ +# endif + { +# ifdef _WIN32 + evpipe_init (EV_A); + + signal (w->signum, ev_sighandler); +# else + struct sigaction sa; + + evpipe_init (EV_A); + + sa.sa_handler = ev_sighandler; + sigfillset (&sa.sa_mask); + sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ + sigaction (w->signum, &sa, 0); + + sigemptyset (&sa.sa_mask); + sigaddset (&sa.sa_mask, w->signum); + sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); #endif - } + } + + EV_FREQUENT_CHECK; } void noinline @@ -2033,24 +2786,51 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + wlist_del (&signals [w->signum - 1].head, (WL)w); ev_stop (EV_A_ (W)w); if (!signals [w->signum - 1].head) - signal (w->signum, SIG_DFL); + { +#if EV_MULTIPLICITY + signals [w->signum - 1].loop = 0; /* unattach from signal */ +#endif +#if EV_USE_SIGNALFD + if (sigfd >= 0) + { + sigset_t ss; + + sigemptyset (&ss); + sigaddset (&ss, w->signum); + sigdelset (&sigfd_set, w->signum); + + signalfd (sigfd, &sigfd_set, 0); + sigprocmask (SIG_UNBLOCK, &ss, 0); + } + else +#endif + signal (w->signum, SIG_DFL); + } + + EV_FREQUENT_CHECK; } void 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)); + assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); #endif if (expect_false (ev_is_active (w))) return; + EV_FREQUENT_CHECK; + ev_start (EV_A_ (W)w, 1); wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); + + EV_FREQUENT_CHECK; } void @@ -2060,8 +2840,12 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } #if EV_STAT_ENABLE @@ -2071,24 +2855,51 @@ # define lstat(a,b) _stati64 (a,b) # endif -#define DEF_STAT_INTERVAL 5.0074891 -#define MIN_STAT_INTERVAL 0.1074891 +#define DEF_STAT_INTERVAL 5.0074891 +#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ +#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 + +/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ +# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 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) + if (w->wd >= 0) + { + struct statfs sfs; + + /* now local changes will be tracked by inotify, but remote changes won't */ + /* unless the filesystem is known to be local, we therefore still poll */ + /* also do poll on <2.6.25, but with normal frequency */ + + if (!fs_2625) + w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; + else if (!statfs (w->path, &sfs) + && (sfs.f_type == 0x1373 /* devfs */ + || sfs.f_type == 0xEF53 /* ext2/3 */ + || sfs.f_type == 0x3153464a /* jfs */ + || sfs.f_type == 0x52654973 /* reiser3 */ + || sfs.f_type == 0x01021994 /* tempfs */ + || sfs.f_type == 0x58465342 /* xfs */)) + w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ + else + w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ + } + else { - ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ + /* can't use inotify, continue to stat */ + w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; - /* monitor some parent directory for speedup hints */ + /* if path is not there, monitor some parent directory for speedup hints */ + /* note that exceeding the hardcoded path limit is not a correctness issue, */ + /* but an efficiency issue only */ if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) { char path [4096]; @@ -2101,8 +2912,8 @@ char *pend = strrchr (path, '/'); - if (!pend) - break; /* whoops, no '/', complain to your admin */ + if (!pend || pend == path) + break; *pend = 0; w->wd = inotify_add_watch (fs_fd, path, mask); @@ -2110,11 +2921,14 @@ 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); + + /* now re-arm timer, if required */ + if (ev_is_active (&w->timer)) ev_ref (EV_A); + ev_timer_again (EV_A_ &w->timer); + if (ev_is_active (&w->timer)) ev_unref (EV_A); } static void noinline @@ -2138,7 +2952,7 @@ infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) { if (slot < 0) - /* overflow, need to check for all hahs slots */ + /* overflow, need to check for all hash slots */ for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) infy_wd (EV_A_ slot, wd, ev); else @@ -2154,6 +2968,7 @@ { if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) { + wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); w->wd = -1; infy_add (EV_A_ w); /* re-add, no matter what */ } @@ -2168,31 +2983,74 @@ 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); + for (ofs = 0; ofs < len; ) + { + struct inotify_event *ev = (struct inotify_event *)(buf + ofs); + infy_wd (EV_A_ ev->wd, ev->wd, ev); + ofs += sizeof (struct inotify_event) + ev->len; + } +} + +inline_size void +check_2625 (EV_P) +{ + /* kernels < 2.6.25 are borked + * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html + */ + struct utsname buf; + int major, minor, micro; + + if (uname (&buf)) + return; + + if (sscanf (buf.release, "%d.%d.%d", &major, &minor, µ) != 3) + return; + + if (major < 2 + || (major == 2 && minor < 6) + || (major == 2 && minor == 6 && micro < 25)) + return; + + fs_2625 = 1; } -void inline_size +inline_size int +infy_newfd (void) +{ +#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) + int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); + if (fd >= 0) + return fd; +#endif + return inotify_init (); +} + +inline_size void infy_init (EV_P) { if (fs_fd != -2) return; - fs_fd = inotify_init (); + fs_fd = -1; + + check_2625 (EV_A); + + fs_fd = infy_newfd (); if (fs_fd >= 0) { + fd_intern (fs_fd); 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); + ev_unref (EV_A); } } -void inline_size +inline_size void infy_fork (EV_P) { int slot; @@ -2200,8 +3058,18 @@ if (fs_fd < 0) return; + ev_ref (EV_A); + ev_io_stop (EV_A_ &fs_w); close (fs_fd); - fs_fd = inotify_init (); + fs_fd = infy_newfd (); + + if (fs_fd >= 0) + { + fd_intern (fs_fd); + ev_io_set (&fs_w, fs_fd, EV_READ); + ev_io_start (EV_A_ &fs_w); + ev_unref (EV_A); + } for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) { @@ -2218,14 +3086,24 @@ if (fs_fd >= 0) infy_add (EV_A_ w); /* re-add, no matter what */ else - ev_timer_start (EV_A_ &w->timer); + { + w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; + if (ev_is_active (&w->timer)) ev_ref (EV_A); + ev_timer_again (EV_A_ &w->timer); + if (ev_is_active (&w->timer)) ev_unref (EV_A); + } } - } } #endif +#ifdef _WIN32 +# define EV_LSTAT(p,b) _stati64 (p, b) +#else +# define EV_LSTAT(p,b) lstat (p, b) +#endif + void ev_stat_stat (EV_P_ ev_stat *w) { @@ -2240,29 +3118,35 @@ { 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_statdata 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 + prev.st_dev != w->attr.st_dev + || prev.st_ino != w->attr.st_ino + || prev.st_mode != w->attr.st_mode + || prev.st_nlink != w->attr.st_nlink + || prev.st_uid != w->attr.st_uid + || prev.st_gid != w->attr.st_gid + || prev.st_rdev != w->attr.st_rdev + || prev.st_size != w->attr.st_size + || prev.st_atime != w->attr.st_atime + || prev.st_mtime != w->attr.st_mtime + || prev.st_ctime != w->attr.st_ctime ) { + /* we only update w->prev on actual differences */ + /* in case we test more often than invoke the callback, */ + /* to ensure that prev is always different to attr */ + w->prev = prev; + #if EV_USE_INOTIFY - infy_del (EV_A_ w); - infy_add (EV_A_ w); - ev_stat_stat (EV_A_ w); /* avoid race... */ + if (fs_fd >= 0) + { + 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); @@ -2275,16 +3159,12 @@ if (expect_false (ev_is_active (w))) return; - /* 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; + if (w->interval < MIN_STAT_INTERVAL && w->interval) + w->interval = MIN_STAT_INTERVAL; - ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); + ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); ev_set_priority (&w->timer, ev_priority (w)); #if EV_USE_INOTIFY @@ -2294,9 +3174,14 @@ infy_add (EV_A_ w); else #endif - ev_timer_start (EV_A_ &w->timer); + { + ev_timer_again (EV_A_ &w->timer); + ev_unref (EV_A); + } ev_start (EV_A_ (W)w, 1); + + EV_FREQUENT_CHECK; } void @@ -2306,12 +3191,21 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + #if EV_USE_INOTIFY infy_del (EV_A_ w); #endif - ev_timer_stop (EV_A_ &w->timer); + + if (ev_is_active (&w->timer)) + { + ev_ref (EV_A); + ev_timer_stop (EV_A_ &w->timer); + } ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } #endif @@ -2324,6 +3218,8 @@ pri_adjust (EV_A_ (W)w); + EV_FREQUENT_CHECK; + { int active = ++idlecnt [ABSPRI (w)]; @@ -2333,6 +3229,8 @@ array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); idles [ABSPRI (w)][active - 1] = w; } + + EV_FREQUENT_CHECK; } void @@ -2342,15 +3240,19 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + { - int active = ((W)w)->active; + int active = ev_active (w); idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; - ((W)idles [ABSPRI (w)][active - 1])->active = active; + ev_active (idles [ABSPRI (w)][active - 1]) = active; ev_stop (EV_A_ (W)w); --idleall; } + + EV_FREQUENT_CHECK; } #endif @@ -2360,9 +3262,13 @@ if (expect_false (ev_is_active (w))) return; + EV_FREQUENT_CHECK; + ev_start (EV_A_ (W)w, ++preparecnt); array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); prepares [preparecnt - 1] = w; + + EV_FREQUENT_CHECK; } void @@ -2372,13 +3278,18 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + { - int active = ((W)w)->active; + int active = ev_active (w); + prepares [active - 1] = prepares [--preparecnt]; - ((W)prepares [active - 1])->active = active; + ev_active (prepares [active - 1]) = active; } ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } void @@ -2387,9 +3298,13 @@ if (expect_false (ev_is_active (w))) return; + EV_FREQUENT_CHECK; + ev_start (EV_A_ (W)w, ++checkcnt); array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); checks [checkcnt - 1] = w; + + EV_FREQUENT_CHECK; } void @@ -2399,13 +3314,18 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + { - int active = ((W)w)->active; + int active = ev_active (w); + checks [active - 1] = checks [--checkcnt]; - ((W)checks [active - 1])->active = active; + ev_active (checks [active - 1]) = active; } ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } #if EV_EMBED_ENABLE @@ -2432,7 +3352,7 @@ ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); { - struct ev_loop *loop = w->other; + EV_P = w->other; while (fdchangecnt) { @@ -2442,6 +3362,23 @@ } } +static void +embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) +{ + ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); + + ev_embed_stop (EV_A_ w); + + { + EV_P = w->other; + + ev_loop_fork (EV_A); + ev_loop (EV_A_ EVLOOP_NONBLOCK); + } + + ev_embed_start (EV_A_ w); +} + #if 0 static void embed_idle_cb (EV_P_ ev_idle *idle, int revents) @@ -2457,11 +3394,13 @@ return; { - struct ev_loop *loop = w->other; - assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); + EV_P = w->other; + assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); } + EV_FREQUENT_CHECK; + ev_set_priority (&w->io, ev_priority (w)); ev_io_start (EV_A_ &w->io); @@ -2469,9 +3408,14 @@ ev_set_priority (&w->prepare, EV_MINPRI); ev_prepare_start (EV_A_ &w->prepare); + ev_fork_init (&w->fork, embed_fork_cb); + ev_fork_start (EV_A_ &w->fork); + /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ ev_start (EV_A_ (W)w, 1); + + EV_FREQUENT_CHECK; } void @@ -2481,10 +3425,15 @@ if (expect_false (!ev_is_active (w))) return; - ev_io_stop (EV_A_ &w->io); + EV_FREQUENT_CHECK; + + ev_io_stop (EV_A_ &w->io); ev_prepare_stop (EV_A_ &w->prepare); + ev_fork_stop (EV_A_ &w->fork); ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } #endif @@ -2495,9 +3444,13 @@ if (expect_false (ev_is_active (w))) return; + EV_FREQUENT_CHECK; + ev_start (EV_A_ (W)w, ++forkcnt); array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); forks [forkcnt - 1] = w; + + EV_FREQUENT_CHECK; } void @@ -2507,13 +3460,18 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + { - int active = ((W)w)->active; + int active = ev_active (w); + forks [active - 1] = forks [--forkcnt]; - ((W)forks [active - 1])->active = active; + ev_active (forks [active - 1]) = active; } ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } #endif @@ -2526,9 +3484,13 @@ evpipe_init (EV_A); + EV_FREQUENT_CHECK; + ev_start (EV_A_ (W)w, ++asynccnt); array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); asyncs [asynccnt - 1] = w; + + EV_FREQUENT_CHECK; } void @@ -2538,20 +3500,25 @@ if (expect_false (!ev_is_active (w))) return; + EV_FREQUENT_CHECK; + { - int active = ((W)w)->active; + int active = ev_active (w); + asyncs [active - 1] = asyncs [--asynccnt]; - ((W)asyncs [active - 1])->active = active; + ev_active (asyncs [active - 1]) = active; } ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; } void ev_async_send (EV_P_ ev_async *w) { w->sent = 1; - evpipe_write (EV_A_ &gotasync); + evpipe_write (EV_A_ &async_pending); } #endif @@ -2571,7 +3538,7 @@ void (*cb)(int revents, void *arg) = once->cb; void *arg = once->arg; - ev_io_stop (EV_A_ &once->io); + ev_io_stop (EV_A_ &once->io); ev_timer_stop (EV_A_ &once->to); ev_free (once); @@ -2581,13 +3548,17 @@ static void once_cb_io (EV_P_ ev_io *w, int revents) { - once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); + struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); + + once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); } static void once_cb_to (EV_P_ ev_timer *w, int revents) { - once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); + struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); + + once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); } void @@ -2619,6 +3590,114 @@ } } +/*****************************************************************************/ + +#if EV_WALK_ENABLE +void +ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) +{ + int i, j; + ev_watcher_list *wl, *wn; + + if (types & (EV_IO | EV_EMBED)) + for (i = 0; i < anfdmax; ++i) + for (wl = anfds [i].head; wl; ) + { + wn = wl->next; + +#if EV_EMBED_ENABLE + if (ev_cb ((ev_io *)wl) == embed_io_cb) + { + if (types & EV_EMBED) + cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); + } + else +#endif +#if EV_USE_INOTIFY + if (ev_cb ((ev_io *)wl) == infy_cb) + ; + else +#endif + if ((ev_io *)wl != &pipe_w) + if (types & EV_IO) + cb (EV_A_ EV_IO, wl); + + wl = wn; + } + + if (types & (EV_TIMER | EV_STAT)) + for (i = timercnt + HEAP0; i-- > HEAP0; ) +#if EV_STAT_ENABLE + /*TODO: timer is not always active*/ + if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) + { + if (types & EV_STAT) + cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); + } + else +#endif + if (types & EV_TIMER) + cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); + +#if EV_PERIODIC_ENABLE + if (types & EV_PERIODIC) + for (i = periodiccnt + HEAP0; i-- > HEAP0; ) + cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); +#endif + +#if EV_IDLE_ENABLE + if (types & EV_IDLE) + for (j = NUMPRI; i--; ) + for (i = idlecnt [j]; i--; ) + cb (EV_A_ EV_IDLE, idles [j][i]); +#endif + +#if EV_FORK_ENABLE + if (types & EV_FORK) + for (i = forkcnt; i--; ) + if (ev_cb (forks [i]) != embed_fork_cb) + cb (EV_A_ EV_FORK, forks [i]); +#endif + +#if EV_ASYNC_ENABLE + if (types & EV_ASYNC) + for (i = asynccnt; i--; ) + cb (EV_A_ EV_ASYNC, asyncs [i]); +#endif + + if (types & EV_PREPARE) + for (i = preparecnt; i--; ) +#if EV_EMBED_ENABLE + if (ev_cb (prepares [i]) != embed_prepare_cb) +#endif + cb (EV_A_ EV_PREPARE, prepares [i]); + + if (types & EV_CHECK) + for (i = checkcnt; i--; ) + cb (EV_A_ EV_CHECK, checks [i]); + + if (types & EV_SIGNAL) + for (i = 0; i < EV_NSIG - 1; ++i) + for (wl = signals [i].head; wl; ) + { + wn = wl->next; + cb (EV_A_ EV_SIGNAL, wl); + wl = wn; + } + + if (types & EV_CHILD) + for (i = EV_PID_HASHSIZE; i--; ) + for (wl = childs [i]; wl; ) + { + wn = wl->next; + cb (EV_A_ EV_CHILD, wl); + wl = wn; + } +/* EV_STAT 0x00001000 /* stat data changed */ +/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ +} +#endif + #if EV_MULTIPLICITY #include "ev_wrap.h" #endif