X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/36718ee47b617f9eeb411c70d1dd87bc33389db3..c20764a666b81af46b955c75eef0f6b088c821b0:/ev.c?ds=sidebyside diff --git a/ev.c b/ev.c index 79b3786..20ad7e4 100644 --- a/ev.c +++ b/ev.c @@ -128,7 +128,11 @@ #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ -#include "ev.h" +#ifdef EV_H +# include EV_H +#else +# include "ev.h" +#endif #if __GNUC__ >= 3 # define expect(expr,value) __builtin_expect ((expr),(value)) @@ -150,64 +154,7 @@ typedef struct ev_watcher_time *WT; static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ -#if WIN32 -/* note: the comment below could not be substantiated, but what would I care */ -/* MSDN says this is required to handle SIGFPE */ -volatile double SIGFPE_REQ = 0.0f; - -static int -ev_socketpair_tcp (int filedes [2]) -{ - struct sockaddr_in addr = { 0 }; - int addr_size = sizeof (addr); - SOCKET listener; - SOCKET sock [2] = { -1, -1 }; - - if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) - return -1; - - addr.sin_family = AF_INET; - addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK); - addr.sin_port = 0; - - if (bind (listener, (struct sockaddr *)&addr, addr_size)) - goto fail; - - if (getsockname(listener, (struct sockaddr *)&addr, &addr_size)) - goto fail; - - if (listen (listener, 1)) - goto fail; - - if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) - goto fail; - - if (connect (sock[0], (struct sockaddr *)&addr, addr_size)) - goto fail; - - if ((sock[1] = accept (listener, 0, 0)) < 0) - goto fail; - - closesocket (listener); - - filedes [0] = sock [0]; - filedes [1] = sock [1]; - - return 0; - -fail: - closesocket (listener); - - if (sock [0] != INVALID_SOCKET) closesocket (sock [0]); - if (sock [1] != INVALID_SOCKET) closesocket (sock [1]); - - return -1; -} - -# define ev_pipe(filedes) ev_socketpair_tcp (filedes) -#else -# define ev_pipe(filedes) pipe (filedes) -#endif +#include "ev_win32.c" /*****************************************************************************/ @@ -274,19 +221,24 @@ typedef struct #if EV_MULTIPLICITY -struct ev_loop -{ -# define VAR(name,decl) decl; -# include "ev_vars.h" -}; -# undef VAR -# include "ev_wrap.h" + struct ev_loop + { + #define VAR(name,decl) decl; + #include "ev_vars.h" + #undef VAR + }; + #include "ev_wrap.h" + + struct ev_loop default_loop_struct; + static struct ev_loop *default_loop; #else -# define VAR(name,decl) static decl; -# include "ev_vars.h" -# undef VAR + #define VAR(name,decl) static decl; + #include "ev_vars.h" + #undef VAR + + static int default_loop; #endif @@ -327,28 +279,28 @@ ev_now (EV_P) return rt_now; } -#define array_roundsize(base,n) ((n) | 4 & ~3) +#define array_roundsize(type,n) ((n) | 4 & ~3) -#define array_needsize(base,cur,cnt,init) \ +#define array_needsize(type,base,cur,cnt,init) \ if (expect_false ((cnt) > cur)) \ { \ int newcnt = cur; \ do \ { \ - newcnt = array_roundsize (base, newcnt << 1); \ + newcnt = array_roundsize (type, newcnt << 1); \ } \ while ((cnt) > newcnt); \ \ - base = ev_realloc (base, sizeof (*base) * (newcnt)); \ + base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ init (base + cur, newcnt - cur); \ cur = newcnt; \ } -#define array_slim(stem) \ +#define array_slim(type,stem) \ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ { \ stem ## max = array_roundsize (stem ## cnt >> 1); \ - base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ + base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ } @@ -375,19 +327,21 @@ anfds_init (ANFD *base, int count) } } -static void -event (EV_P_ W w, int events) +void +ev_feed_event (EV_P_ void *w, int revents) { - if (w->pending) + W w_ = (W)w; + + if (w_->pending) { - pendings [ABSPRI (w)][w->pending - 1].events |= events; + pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; return; } - w->pending = ++pendingcnt [ABSPRI (w)]; - array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void)); - pendings [ABSPRI (w)][w->pending - 1].w = w; - pendings [ABSPRI (w)][w->pending - 1].events = events; + w_->pending = ++pendingcnt [ABSPRI (w_)]; + array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void)); + pendings [ABSPRI (w_)][w_->pending - 1].w = w_; + pendings [ABSPRI (w_)][w_->pending - 1].events = revents; } static void @@ -396,24 +350,30 @@ queue_events (EV_P_ W *events, int eventcnt, int type) int i; for (i = 0; i < eventcnt; ++i) - event (EV_A_ events [i], type); + ev_feed_event (EV_A_ events [i], type); } -static void -fd_event (EV_P_ int fd, int events) +inline void +fd_event (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; struct ev_io *w; for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) { - int ev = w->events & events; + int ev = w->events & revents; if (ev) - event (EV_A_ (W)w, ev); + ev_feed_event (EV_A_ (W)w, ev); } } +void +ev_feed_fd_event (EV_P_ int fd, int revents) +{ + fd_event (EV_A_ fd, revents); +} + /*****************************************************************************/ static void @@ -450,7 +410,7 @@ fd_change (EV_P_ int fd) anfds [fd].reify = 1; ++fdchangecnt; - array_needsize (fdchanges, fdchangemax, fdchangecnt, (void)); + array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); fdchanges [fdchangecnt - 1] = fd; } @@ -462,7 +422,7 @@ fd_kill (EV_P_ int fd) while ((w = (struct ev_io *)anfds [fd].head)) { ev_io_stop (EV_A_ w); - event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); + ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); } } @@ -600,28 +560,50 @@ sighandler (int signum) { int old_errno = errno; gotsig = 1; +#ifdef WIN32 + send (sigpipe [1], &signum, 1, MSG_DONTWAIT); +#else write (sigpipe [1], &signum, 1); +#endif errno = old_errno; } } +void +ev_feed_signal_event (EV_P_ int signum) +{ + WL w; + +#if EV_MULTIPLICITY + assert (("feeding signal events is only supported in the default loop", loop == default_loop)); +#endif + + --signum; + + if (signum < 0 || signum >= signalmax) + return; + + signals [signum].gotsig = 0; + + for (w = signals [signum].head; w; w = w->next) + ev_feed_event (EV_A_ (W)w, EV_SIGNAL); +} + static void sigcb (EV_P_ struct ev_io *iow, int revents) { - WL w; int signum; +#ifdef WIN32 + recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); +#else read (sigpipe [0], &revents, 1); +#endif gotsig = 0; for (signum = signalmax; signum--; ) if (signals [signum].gotsig) - { - signals [signum].gotsig = 0; - - for (w = signals [signum].head; w; w = w->next) - event (EV_A_ (W)w, EV_SIGNAL); - } + ev_feed_signal_event (EV_A_ signum + 1); } static void @@ -664,7 +646,7 @@ child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) ev_priority (w) = ev_priority (sw); /* need to do it *now* */ w->rpid = pid; w->rstatus = status; - event (EV_A_ (W)w, EV_CHILD); + ev_feed_event (EV_A_ (W)w, EV_CHILD); } } @@ -676,7 +658,7 @@ childcb (EV_P_ struct ev_signal *sw, int revents) if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) { /* make sure we are called again until all childs have been reaped */ - event (EV_A_ (W)sw, EV_SIGNAL); + ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); child_reap (EV_A_ sw, pid, pid, status); child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ @@ -830,7 +812,7 @@ loop_fork (EV_P) close (sigpipe [0]); close (sigpipe [1]); - while (ev_pipe (sigpipe)) + while (pipe (sigpipe)) syserr ("(libev) error creating pipe"); siginit (EV_A); @@ -871,19 +853,14 @@ ev_loop_fork (EV_P) #endif #if EV_MULTIPLICITY -struct ev_loop default_loop_struct; -static struct ev_loop *default_loop; - struct ev_loop * #else -static int default_loop; - int #endif ev_default_loop (int methods) { if (sigpipe [0] == sigpipe [1]) - if (ev_pipe (sigpipe)) + if (pipe (sigpipe)) return 0; if (!default_loop) @@ -948,6 +925,18 @@ ev_default_fork (void) /*****************************************************************************/ +static int +any_pending (EV_P) +{ + int pri; + + for (pri = NUMPRI; pri--; ) + if (pendingcnt [pri]) + return 1; + + return 0; +} + static void call_pending (EV_P) { @@ -985,7 +974,7 @@ timers_reify (EV_P) else ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ - event (EV_A_ (W)w, EV_TIMEOUT); + ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); } } @@ -999,7 +988,14 @@ periodics_reify (EV_P) assert (("inactive timer on periodic heap detected", ev_is_active (w))); /* first reschedule or stop timer */ - if (w->interval) + if (w->reschedule_cb) + { + ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); + + assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now)); + downheap ((WT *)periodics, periodiccnt, 0); + } + else if (w->interval) { ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); @@ -1008,7 +1004,7 @@ periodics_reify (EV_P) else ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ - event (EV_A_ (W)w, EV_PERIODIC); + ev_feed_event (EV_A_ (W)w, EV_PERIODIC); } } @@ -1022,19 +1018,15 @@ periodics_reschedule (EV_P) { struct ev_periodic *w = periodics [i]; - if (w->interval) - { - ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; - - if (fabs (diff) >= 1e-4) - { - ev_periodic_stop (EV_A_ w); - ev_periodic_start (EV_A_ w); - - i = 0; /* restart loop, inefficient, but time jumps should be rare */ - } - } + if (w->reschedule_cb) + ((WT)w)->at = w->reschedule_cb (w, rt_now); + else if (w->interval) + ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; } + + /* now rebuild the heap */ + for (i = periodiccnt >> 1; i--; ) + downheap ((WT *)periodics, periodiccnt, i); } inline int @@ -1140,7 +1132,7 @@ ev_loop (EV_P_ int flags) /* calculate blocking time */ - /* we only need this for !monotonic clockor timers, but as we basically + /* we only need this for !monotonic clock or timers, but as we basically always have timers, we just calculate it always */ #if EV_USE_MONOTONIC if (expect_true (have_monotonic)) @@ -1183,7 +1175,7 @@ ev_loop (EV_P_ int flags) periodics_reify (EV_A); /* absolute timers called first */ /* queue idle watchers unless io or timers are pending */ - if (!pendingcnt) + if (idlecnt && !any_pending (EV_A)) queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); /* queue check watchers, to be executed first */ @@ -1268,7 +1260,7 @@ 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); @@ -1298,7 +1290,7 @@ ev_timer_start (EV_P_ struct ev_timer *w) assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); ev_start (EV_A_ (W)w, ++timercnt); - array_needsize (timers, timermax, timercnt, (void)); + array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); timers [timercnt - 1] = w; upheap ((WT *)timers, timercnt - 1); @@ -1348,14 +1340,17 @@ ev_periodic_start (EV_P_ struct ev_periodic *w) if (ev_is_active (w)) return; - assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); - - /* this formula differs from the one in periodic_reify because we do not always round up */ - if (w->interval) - ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; + if (w->reschedule_cb) + ((WT)w)->at = w->reschedule_cb (w, rt_now); + else if (w->interval) + { + assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); + /* this formula differs from the one in periodic_reify because we do not always round up */ + ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; + } ev_start (EV_A_ (W)w, ++periodiccnt); - array_needsize (periodics, periodicmax, periodiccnt, (void)); + array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); periodics [periodiccnt - 1] = w; upheap ((WT *)periodics, periodiccnt - 1); @@ -1380,6 +1375,13 @@ ev_periodic_stop (EV_P_ struct ev_periodic *w) ev_stop (EV_A_ (W)w); } +void +ev_periodic_again (EV_P_ struct ev_periodic *w) +{ + ev_periodic_stop (EV_A_ w); + ev_periodic_start (EV_A_ w); +} + void ev_idle_start (EV_P_ struct ev_idle *w) { @@ -1387,7 +1389,7 @@ ev_idle_start (EV_P_ struct ev_idle *w) return; ev_start (EV_A_ (W)w, ++idlecnt); - array_needsize (idles, idlemax, idlecnt, (void)); + array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void)); idles [idlecnt - 1] = w; } @@ -1409,7 +1411,7 @@ ev_prepare_start (EV_P_ struct ev_prepare *w) return; ev_start (EV_A_ (W)w, ++preparecnt); - array_needsize (prepares, preparemax, preparecnt, (void)); + array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void)); prepares [preparecnt - 1] = w; } @@ -1431,7 +1433,7 @@ ev_check_start (EV_P_ struct ev_check *w) return; ev_start (EV_A_ (W)w, ++checkcnt); - array_needsize (checks, checkmax, checkcnt, (void)); + array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void)); checks [checkcnt - 1] = w; } @@ -1462,7 +1464,7 @@ ev_signal_start (EV_P_ struct ev_signal *w) assert (("ev_signal_start called with illegal signal number", w->signum > 0)); ev_start (EV_A_ (W)w, 1); - array_needsize (signals, signalmax, w->signum, signals_init); + array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); if (!((WL)w)->next) @@ -1555,7 +1557,7 @@ once_cb_to (EV_P_ struct ev_timer *w, int revents) void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) { - struct ev_once *once = ev_malloc (sizeof (struct ev_once)); + struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); if (!once) cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);