X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/5e20ccfe261679c78f9aa365ac087fb0700e0f2b..85e9d898522a460b8dcf57f1781f6acc3d2f3ee5:/ev.c diff --git a/ev.c b/ev.c index 9686364..e3e7e57 100644 --- a/ev.c +++ b/ev.c @@ -30,13 +30,33 @@ */ #ifndef EV_STANDALONE # include "config.h" + +# if HAVE_CLOCK_GETTIME +# define EV_USE_MONOTONIC 1 +# define EV_USE_REALTIME 1 +# endif + +# if HAVE_SELECT && HAVE_SYS_SELECT_H +# define EV_USE_SELECT 1 +# endif + +# if HAVE_POLL && HAVE_POLL_H +# define EV_USE_POLL 1 +# endif + +# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H +# define EV_USE_EPOLL 1 +# endif + +# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H +# define EV_USE_KQUEUE 1 +# endif + #endif #include #include -#include #include -#include #include #include @@ -44,12 +64,15 @@ #include #include #include +#include + +#include + #ifndef WIN32 +# include +# include # include #endif -#include -#include - /**/ #ifndef EV_USE_MONOTONIC @@ -60,8 +83,8 @@ # define EV_USE_SELECT 1 #endif -#ifndef EV_USEV_POLL -# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */ +#ifndef EV_USE_POLL +# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ #endif #ifndef EV_USE_EPOLL @@ -72,6 +95,16 @@ # define EV_USE_KQUEUE 0 #endif +#ifndef EV_USE_WIN32 +# ifdef WIN32 +# define EV_USE_WIN32 0 /* it does not exist, use select */ +# undef EV_USE_SELECT +# define EV_USE_SELECT 1 +# else +# define EV_USE_WIN32 0 +# endif +#endif + #ifndef EV_USE_REALTIME # define EV_USE_REALTIME 1 #endif @@ -117,11 +150,61 @@ typedef struct ev_watcher_time *WT; static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ +#include "ev_win32.c" + +/*****************************************************************************/ + +static void (*syserr_cb)(const char *msg); + +void ev_set_syserr_cb (void (*cb)(const char *msg)) +{ + syserr_cb = cb; +} + +static void +syserr (const char *msg) +{ + if (!msg) + msg = "(libev) system error"; + + if (syserr_cb) + syserr_cb (msg); + else + { + perror (msg); + abort (); + } +} + +static void *(*alloc)(void *ptr, long size); + +void ev_set_allocator (void *(*cb)(void *ptr, long size)) +{ + alloc = cb; +} + +static void * +ev_realloc (void *ptr, long size) +{ + ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); + + if (!ptr && size) + { + fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); + abort (); + } + + return ptr; +} + +#define ev_malloc(size) ev_realloc (0, (size)) +#define ev_free(ptr) ev_realloc ((ptr), 0) + /*****************************************************************************/ typedef struct { - struct ev_watcher_list *head; + WL head; unsigned char events; unsigned char reify; } ANFD; @@ -187,23 +270,39 @@ ev_now (EV_P) return rt_now; } -#define array_roundsize(base,n) ((n) | 4 & ~3) - -#define array_needsize(base,cur,cnt,init) \ - if (expect_false ((cnt) > cur)) \ - { \ - int newcnt = cur; \ - do \ - { \ - newcnt = array_roundsize (base, newcnt << 1); \ - } \ - while ((cnt) > newcnt); \ - \ - base = realloc (base, sizeof (*base) * (newcnt)); \ - init (base + cur, newcnt - cur); \ - cur = newcnt; \ +#define array_roundsize(type,n) ((n) | 4 & ~3) + +#define array_needsize(type,base,cur,cnt,init) \ + 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; \ } +#define array_slim(type,stem) \ + if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ + { \ + stem ## max = array_roundsize (stem ## cnt >> 1); \ + base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ + fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ + } + +/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */ +/* bringing us everlasting joy in form of stupid extra macros that are not required in C */ +#define array_free_microshit(stem) \ + ev_free (stem ## s); stem ## cnt = stem ## max = 0; + +#define array_free(stem, idx) \ + ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; + /*****************************************************************************/ static void @@ -229,7 +328,7 @@ event (EV_P_ W w, int events) } w->pending = ++pendingcnt [ABSPRI (w)]; - array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); + array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void)); pendings [ABSPRI (w)][w->pending - 1].w = w; pendings [ABSPRI (w)][w->pending - 1].events = events; } @@ -278,11 +377,8 @@ fd_reify (EV_P) anfd->reify = 0; - if (anfd->events != events) - { - method_modify (EV_A_ fd, anfd->events, events); - anfd->events = events; - } + method_modify (EV_A_ fd, anfd->events, events); + anfd->events = events; } fdchangecnt = 0; @@ -291,13 +387,13 @@ fd_reify (EV_P) static void fd_change (EV_P_ int fd) { - if (anfds [fd].reify || fdchangecnt < 0) + if (anfds [fd].reify) return; anfds [fd].reify = 1; ++fdchangecnt; - array_needsize (fdchanges, fdchangemax, fdchangecnt, ); + array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); fdchanges [fdchangecnt - 1] = fd; } @@ -313,6 +409,16 @@ fd_kill (EV_P_ int fd) } } +static int +fd_valid (int fd) +{ +#ifdef WIN32 + return !!win32_get_osfhandle (fd); +#else + return fcntl (fd, F_GETFD) != -1; +#endif +} + /* called on EBADF to verify fds */ static void fd_ebadf (EV_P) @@ -321,7 +427,7 @@ fd_ebadf (EV_P) for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) - if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) + if (!fd_valid (fd) == -1 && errno == EBADF) fd_kill (EV_A_ fd); } @@ -329,18 +435,17 @@ fd_ebadf (EV_P) static void fd_enomem (EV_P) { - int fd = anfdmax; + int fd; - while (fd--) + for (fd = anfdmax; fd--; ) if (anfds [fd].events) { - close (fd); fd_kill (EV_A_ fd); return; } } -/* susually called after fork if method needs to re-arm all fds from scratch */ +/* usually called after fork if method needs to re-arm all fds from scratch */ static void fd_rearm_all (EV_P) { @@ -351,7 +456,7 @@ fd_rearm_all (EV_P) if (anfds [fd].events) { anfds [fd].events = 0; - fd_change (fd); + fd_change (EV_A_ fd); } } @@ -365,12 +470,12 @@ upheap (WT *heap, int k) while (k && heap [k >> 1]->at > w->at) { heap [k] = heap [k >> 1]; - heap [k]->active = k + 1; + ((W)heap [k])->active = k + 1; k >>= 1; } heap [k] = w; - heap [k]->active = k + 1; + ((W)heap [k])->active = k + 1; } @@ -390,19 +495,19 @@ downheap (WT *heap, int N, int k) break; heap [k] = heap [j]; - heap [k]->active = k + 1; + ((W)heap [k])->active = k + 1; k = j; } heap [k] = w; - heap [k]->active = k + 1; + ((W)heap [k])->active = k + 1; } /*****************************************************************************/ typedef struct { - struct ev_watcher_list *head; + WL head; sig_atomic_t volatile gotsig; } ANSIG; @@ -411,6 +516,7 @@ static int signalmax; static int sigpipe [2]; static sig_atomic_t volatile gotsig; +static struct ev_io sigev; static void signals_init (ANSIG *base, int count) @@ -427,6 +533,10 @@ signals_init (ANSIG *base, int count) static void sighandler (int signum) { +#if WIN32 + signal (signum, sighandler); +#endif + signals [signum - 1].gotsig = 1; if (!gotsig) @@ -441,7 +551,7 @@ sighandler (int signum) static void sigcb (EV_P_ struct ev_io *iow, int revents) { - struct ev_watcher_list *w; + WL w; int signum; read (sigpipe [0], &revents, 1); @@ -476,8 +586,12 @@ siginit (EV_P) /*****************************************************************************/ +static struct ev_child *childs [PID_HASHSIZE]; + #ifndef WIN32 +static struct ev_signal childev; + #ifndef WCONTINUED # define WCONTINUED 0 #endif @@ -490,9 +604,9 @@ child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) if (w->pid == pid || !w->pid) { - w->priority = sw->priority; /* need to do it *now* */ - w->rpid = pid; - w->rstatus = status; + ev_priority (w) = ev_priority (sw); /* need to do it *now* */ + w->rpid = pid; + w->rstatus = status; event (EV_A_ (W)w, EV_CHILD); } } @@ -522,7 +636,7 @@ childcb (EV_P_ struct ev_signal *sw, int revents) #if EV_USE_EPOLL # include "ev_epoll.c" #endif -#if EV_USEV_POLL +#if EV_USE_POLL # include "ev_poll.c" #endif #if EV_USE_SELECT @@ -584,62 +698,101 @@ loop_init (EV_P_ int methods) methods = EVMETHOD_ANY; method = 0; +#if EV_USE_WIN32 + if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); +#endif #if EV_USE_KQUEUE if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); #endif #if EV_USE_EPOLL if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); #endif -#if EV_USEV_POLL +#if EV_USE_POLL if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); #endif #if EV_USE_SELECT if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); #endif + + ev_watcher_init (&sigev, sigcb); + ev_set_priority (&sigev, EV_MAXPRI); } } void loop_destroy (EV_P) { + int i; + +#if EV_USE_WIN32 + if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); +#endif #if EV_USE_KQUEUE if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); #endif #if EV_USE_EPOLL if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); #endif -#if EV_USEV_POLL +#if EV_USE_POLL if (method == EVMETHOD_POLL ) poll_destroy (EV_A); #endif #if EV_USE_SELECT if (method == EVMETHOD_SELECT) select_destroy (EV_A); #endif + for (i = NUMPRI; i--; ) + array_free (pending, [i]); + + /* have to use the microsoft-never-gets-it-right macro */ + array_free_microshit (fdchange); + array_free_microshit (timer); + array_free_microshit (periodic); + array_free_microshit (idle); + array_free_microshit (prepare); + array_free_microshit (check); + method = 0; - /*TODO*/ } -void +static void loop_fork (EV_P) { - /*TODO*/ #if EV_USE_EPOLL if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); #endif #if EV_USE_KQUEUE if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); #endif + + if (ev_is_active (&sigev)) + { + /* default loop */ + + ev_ref (EV_A); + ev_io_stop (EV_A_ &sigev); + close (sigpipe [0]); + close (sigpipe [1]); + + while (pipe (sigpipe)) + syserr ("(libev) error creating pipe"); + + siginit (EV_A); + } + + postfork = 0; } #if EV_MULTIPLICITY struct ev_loop * ev_loop_new (int methods) { - struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); + struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); + + memset (loop, 0, sizeof (struct ev_loop)); loop_init (EV_A_ methods); - if (ev_methods (EV_A)) + if (ev_method (EV_A)) return loop; return 0; @@ -649,13 +802,13 @@ void ev_loop_destroy (EV_P) { loop_destroy (EV_A); - free (loop); + ev_free (loop); } void ev_loop_fork (EV_P) { - loop_fork (EV_A); + postfork = 1; } #endif @@ -688,8 +841,6 @@ ev_default_loop (int methods) if (ev_method (EV_A)) { - ev_watcher_init (&sigev, sigcb); - ev_set_priority (&sigev, EV_MAXPRI); siginit (EV_A); #ifndef WIN32 @@ -709,10 +860,14 @@ ev_default_loop (int methods) void ev_default_destroy (void) { +#if EV_MULTIPLICITY struct ev_loop *loop = default_loop; +#endif +#ifndef WIN32 ev_ref (EV_A); /* child watcher */ ev_signal_stop (EV_A_ &childev); +#endif ev_ref (EV_A); /* signal watcher */ ev_io_stop (EV_A_ &sigev); @@ -724,17 +879,14 @@ ev_default_destroy (void) } void -ev_default_fork (EV_P) +ev_default_fork (void) { - loop_fork (EV_A); - - ev_io_stop (EV_A_ &sigev); - close (sigpipe [0]); - close (sigpipe [1]); - pipe (sigpipe); +#if EV_MULTIPLICITY + struct ev_loop *loop = default_loop; +#endif - ev_ref (EV_A); /* signal watcher */ - siginit (EV_A); + if (method) + postfork = 1; } /*****************************************************************************/ @@ -760,15 +912,17 @@ call_pending (EV_P) static void timers_reify (EV_P) { - while (timercnt && timers [0]->at <= mn_now) + while (timercnt && ((WT)timers [0])->at <= mn_now) { struct ev_timer *w = timers [0]; + assert (("inactive timer on timer heap detected", ev_is_active (w))); + /* first reschedule or stop timer */ if (w->repeat) { assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); - w->at = mn_now + w->repeat; + ((WT)w)->at = mn_now + w->repeat; downheap ((WT *)timers, timercnt, 0); } else @@ -781,15 +935,17 @@ timers_reify (EV_P) static void periodics_reify (EV_P) { - while (periodiccnt && periodics [0]->at <= rt_now) + while (periodiccnt && ((WT)periodics [0])->at <= rt_now) { struct ev_periodic *w = periodics [0]; + assert (("inactive timer on periodic heap detected", ev_is_active (w))); + /* first reschedule or stop timer */ if (w->interval) { - w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; - assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); + ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; + assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); downheap ((WT *)periodics, periodiccnt, 0); } else @@ -811,7 +967,7 @@ periodics_reschedule (EV_P) if (w->interval) { - ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; + ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; if (fabs (diff) >= 1e-4) { @@ -882,7 +1038,7 @@ time_update (EV_P) /* adjust timers. this is easy, as the offset is the same for all */ for (i = 0; i < timercnt; ++i) - timers [i]->at += rt_now - mn_now; + ((WT)timers [i])->at += rt_now - mn_now; } mn_now = rt_now; @@ -918,6 +1074,10 @@ ev_loop (EV_P_ int flags) call_pending (EV_A); } + /* we might have forked, so reify kernel state if necessary */ + if (expect_false (postfork)) + loop_fork (EV_A); + /* update fd-related kernel structures */ fd_reify (EV_A); @@ -943,13 +1103,13 @@ ev_loop (EV_P_ int flags) if (timercnt) { - ev_tstamp to = timers [0]->at - mn_now + method_fudge; + ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; if (block > to) block = to; } if (periodiccnt) { - ev_tstamp to = periodics [0]->at - rt_now + method_fudge; + ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; if (block > to) block = to; } @@ -1051,7 +1211,7 @@ ev_io_start (EV_P_ struct ev_io *w) assert (("ev_io_start called with negative fd", fd >= 0)); ev_start (EV_A_ (W)w, 1); - array_needsize (anfds, anfdmax, fd + 1, anfds_init); + array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); wlist_add ((WL *)&anfds[fd].head, (WL)w); fd_change (EV_A_ fd); @@ -1076,14 +1236,16 @@ ev_timer_start (EV_P_ struct ev_timer *w) if (ev_is_active (w)) return; - w->at += mn_now; + ((WT)w)->at += mn_now; assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); ev_start (EV_A_ (W)w, ++timercnt); - array_needsize (timers, timermax, timercnt, ); + array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); timers [timercnt - 1] = w; upheap ((WT *)timers, timercnt - 1); + + assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); } void @@ -1093,13 +1255,15 @@ ev_timer_stop (EV_P_ struct ev_timer *w) if (!ev_is_active (w)) return; - if (w->active < timercnt--) + assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); + + if (((W)w)->active < timercnt--) { - timers [w->active - 1] = timers [timercnt]; - downheap ((WT *)timers, timercnt, w->active - 1); + timers [((W)w)->active - 1] = timers [timercnt]; + downheap ((WT *)timers, timercnt, ((W)w)->active - 1); } - w->at = w->repeat; + ((WT)w)->at = w->repeat; ev_stop (EV_A_ (W)w); } @@ -1111,8 +1275,8 @@ ev_timer_again (EV_P_ struct ev_timer *w) { if (w->repeat) { - w->at = mn_now + w->repeat; - downheap ((WT *)timers, timercnt, w->active - 1); + ((WT)w)->at = mn_now + w->repeat; + downheap ((WT *)timers, timercnt, ((W)w)->active - 1); } else ev_timer_stop (EV_A_ w); @@ -1131,12 +1295,14 @@ ev_periodic_start (EV_P_ struct ev_periodic *w) /* this formula differs from the one in periodic_reify because we do not always round up */ if (w->interval) - w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; + ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; ev_start (EV_A_ (W)w, ++periodiccnt); - array_needsize (periodics, periodicmax, periodiccnt, ); + array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); periodics [periodiccnt - 1] = w; upheap ((WT *)periodics, periodiccnt - 1); + + assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); } void @@ -1146,10 +1312,12 @@ ev_periodic_stop (EV_P_ struct ev_periodic *w) if (!ev_is_active (w)) return; - if (w->active < periodiccnt--) + assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); + + if (((W)w)->active < periodiccnt--) { - periodics [w->active - 1] = periodics [periodiccnt]; - downheap ((WT *)periodics, periodiccnt, w->active - 1); + periodics [((W)w)->active - 1] = periodics [periodiccnt]; + downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); } ev_stop (EV_A_ (W)w); @@ -1162,7 +1330,7 @@ ev_idle_start (EV_P_ struct ev_idle *w) return; ev_start (EV_A_ (W)w, ++idlecnt); - array_needsize (idles, idlemax, idlecnt, ); + array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void)); idles [idlecnt - 1] = w; } @@ -1173,7 +1341,7 @@ ev_idle_stop (EV_P_ struct ev_idle *w) if (ev_is_active (w)) return; - idles [w->active - 1] = idles [--idlecnt]; + idles [((W)w)->active - 1] = idles [--idlecnt]; ev_stop (EV_A_ (W)w); } @@ -1184,7 +1352,7 @@ ev_prepare_start (EV_P_ struct ev_prepare *w) return; ev_start (EV_A_ (W)w, ++preparecnt); - array_needsize (prepares, preparemax, preparecnt, ); + array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void)); prepares [preparecnt - 1] = w; } @@ -1195,7 +1363,7 @@ ev_prepare_stop (EV_P_ struct ev_prepare *w) if (ev_is_active (w)) return; - prepares [w->active - 1] = prepares [--preparecnt]; + prepares [((W)w)->active - 1] = prepares [--preparecnt]; ev_stop (EV_A_ (W)w); } @@ -1206,7 +1374,7 @@ ev_check_start (EV_P_ struct ev_check *w) return; ev_start (EV_A_ (W)w, ++checkcnt); - array_needsize (checks, checkmax, checkcnt, ); + array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void)); checks [checkcnt - 1] = w; } @@ -1217,7 +1385,7 @@ ev_check_stop (EV_P_ struct ev_check *w) if (ev_is_active (w)) return; - checks [w->active - 1] = checks [--checkcnt]; + checks [((W)w)->active - 1] = checks [--checkcnt]; ev_stop (EV_A_ (W)w); } @@ -1237,16 +1405,20 @@ ev_signal_start (EV_P_ struct ev_signal *w) assert (("ev_signal_start called with illegal signal number", w->signum > 0)); ev_start (EV_A_ (W)w, 1); - array_needsize (signals, signalmax, w->signum, signals_init); + array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); - if (!w->next) + 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 } } @@ -1306,7 +1478,7 @@ once_cb (EV_P_ struct ev_once *once, int revents) ev_io_stop (EV_A_ &once->io); ev_timer_stop (EV_A_ &once->to); - free (once); + ev_free (once); cb (revents, arg); } @@ -1326,7 +1498,7 @@ once_cb_to (EV_P_ struct ev_timer *w, int revents) void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) { - struct ev_once *once = malloc (sizeof (struct ev_once)); + struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); if (!once) cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);