[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC

 #include <assert.h>
 #include <errno.h>
 #include <sys/types.h>
 #include <time.h>
-#ifndef PERL
-# include <signal.h>
+#include <signal.h>
-#endif
 #ifndef WIN32
 # include <unistd.h>
 # include <sys/time.h>
 # include <sys/wait.h>
 typedef struct ev_watcher_list *WL;
 typedef struct ev_watcher_time *WT;
 static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
-#if WIN32
+#include "ev_win32.c"
-/* 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;
-#endif
 /*****************************************************************************/
 static void (*syserr_cb)(const char *msg);
 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*/\
     }
 /* 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 */
       ++base;
     }
 }
-static void
+void
-event (EV_P_ W w, int events)
+ev_feed_event (EV_P_ void *w, int revents)
 {
+  W w_ = (W)w;
-  if (w->pending)
+  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)];
+  w_->pending = ++pendingcnt [ABSPRI (w_)];
-  array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
+  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].w      = w_;
-  pendings [ABSPRI (w)][w->pending - 1].events = events;
+  pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
 }
 static void
 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
+inline void
-fd_event (EV_P_ int fd, int events)
+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
     return;
   anfds [fd].reify = 1;
   ++fdchangecnt;
-  array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
+  array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
   fdchanges [fdchangecnt - 1] = fd;
 }
 static void
 fd_kill (EV_P_ int fd)
   struct ev_io *w;
   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);
     }
 }
 static int
 fd_valid (int fd)
   if (!gotsig)
     {
       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)
+{
+#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)
-      {
+      sigevent (EV_A_ signum + 1);
-        signals [signum].gotsig = 0;
-        for (w = signals [signum].head; w; w = w->next)
-          event (EV_A_ (W)w, EV_SIGNAL);
-      }
 }
 static void
 siginit (EV_P)
 {
     if (w->pid == pid || !w->pid)
       {
         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);
       }
 }
 static void
 childcb (EV_P_ struct ev_signal *sw, int revents)
   int pid, status;
   if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
     {
       /* make sure we are called again until all childs have been reaped */
-      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 */
     }
 }
   if (method)
     postfork = 1;
 }
 /*****************************************************************************/
+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)
 {
   int pri;
           downheap ((WT *)timers, timercnt, 0);
         }
       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);
     }
 }
 static void
 periodics_reify (EV_P)
       struct ev_periodic *w = periodics [0];
       assert (("inactive timer on periodic heap detected", ev_is_active (w)));
       /* first reschedule or stop timer */
+      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);
+        }
-      if (w->interval)
+      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));
           downheap ((WT *)periodics, periodiccnt, 0);
         }
       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);
     }
 }
 static void
 periodics_reschedule (EV_P)
   /* adjust periodics after time jump */
   for (i = 0; i < periodiccnt; ++i)
     {
       struct ev_periodic *w = periodics [i];
+      if (w->reschedule_cb)
+        ((WT)w)->at = w->reschedule_cb (w, rt_now);
-      if (w->interval)
+      else if (w->interval)
-        {
-          ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+        ((WT)w)->at += 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 */
-            }
-        }
     }
+  /* now rebuild the heap */
+  for (i = periodiccnt >> 1; i--; )
+    downheap ((WT *)periodics, periodiccnt, i);
 }
 inline int
 time_update_monotonic (EV_P)
 {
       /* update fd-related kernel structures */
       fd_reify (EV_A);
       /* 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))
         time_update_monotonic (EV_A);
       else
       /* queue pending timers and reschedule them */
       timers_reify (EV_A); /* relative timers called last */
       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 */
       if (checkcnt)
         queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
     return;
   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);
 }
   ((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, (void));
+  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));
 }
 ev_periodic_start (EV_P_ struct ev_periodic *w)
 {
   if (ev_is_active (w))
     return;
+  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.));
+      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 */
+      /* 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;
+      ((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);
   assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == 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)
 {
   if (ev_is_active (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;
 }
 void
 ev_idle_stop (EV_P_ struct ev_idle *w)
 {
   if (ev_is_active (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;
 }
 void
 ev_prepare_stop (EV_P_ struct ev_prepare *w)
 {
   if (ev_is_active (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;
 }
 void
 ev_check_stop (EV_P_ struct ev_check *w)
     return;
   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)
     {
 #if WIN32
 }
 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);
   else
     {

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Comparing libev/ev.c (file contents): Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC vs. Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC