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

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC

 #include <stdio.h>
 #include <assert.h>
 #include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 #include <sys/time.h>
 #include <time.h>
-#define HAVE_EPOLL 1
 #ifndef HAVE_MONOTONIC
 # ifdef CLOCK_MONOTONIC
 #  define HAVE_MONOTONIC 1
 # endif
 # define HAVE_REALTIME 1 /* posix requirement, but might be slower */
 #endif
 #define MIN_TIMEJUMP  1. /* minimum timejump that gets detected (if monotonic clock available) */
 #define MAX_BLOCKTIME 60.
+#define PID_HASHSIZE  16 /* size of pid hahs table, must be power of two */
 #include "ev.h"
 typedef struct ev_watcher *W;
 typedef struct ev_watcher_list *WL;
   for (i = 0; i < eventcnt; ++i)
     event (events [i], type);
 }
+/* called on EBADF to verify fds */
+static void
+fd_recheck ()
+{
+  int fd;
+  for (fd = 0; fd < anfdmax; ++fd)
+    if (anfds [fd].wev)
+      if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
+        while (anfds [fd].head)
+          evio_stop (anfds [fd].head);
+}
 /*****************************************************************************/
 static struct ev_timer **timers;
 static int timermax, timercnt;
 /*****************************************************************************/
 static struct ev_idle **idles;
 static int idlemax, idlecnt;
+static struct ev_prepare **prepares;
+static int preparemax, preparecnt;
 static struct ev_check **checks;
 static int checkmax, checkcnt;
+/*****************************************************************************/
+static struct ev_child *childs [PID_HASHSIZE];
+static struct ev_signal childev;
+#ifndef WCONTINUED
+# define WCONTINUED 0
+#endif
+static void
+childcb (struct ev_signal *sw, int revents)
+{
+  struct ev_child *w;
+  int pid, status;
+  while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
+    for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
+      if (w->pid == pid || w->pid == -1)
+        {
+          w->status = status;
+          event ((W)w, EV_CHILD);
+        }
+}
 /*****************************************************************************/
 #if HAVE_EPOLL
 # include "ev_epoll.c"
   if (ev_method)
     {
       evw_init (&sigev, sigcb);
       siginit ();
+      evsignal_init (&childev, childcb, SIGCHLD);
+      evsignal_start (&childev);
     }
   return ev_method;
 }
 }
 static void
 call_pending ()
 {
-  int i;
+  while (pendingcnt)
-  for (i = 0; i < pendingcnt; ++i)
     {
-      ANPENDING *p = pendings + i;
+      ANPENDING *p = pendings + --pendingcnt;
       if (p->w)
         {
           p->w->pending = 0;
           p->w->cb (p->w, p->events);
         }
     }
-  pendingcnt = 0;
 }
 static void
 timers_reify ()
 {
 void ev_loop (int flags)
 {
   double block;
   ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
-  if (checkcnt)
-    {
-      queue_events ((W *)checks, checkcnt, EV_CHECK);
-      call_pending ();
-    }
   do
     {
+      /* queue check watchers (and execute them) */
+      if (preparecnt)
+        {
+          queue_events ((W *)prepares, preparecnt, EV_PREPARE);
+          call_pending ();
+        }
       /* update fd-related kernel structures */
       fd_reify ();
       /* calculate blocking time */
-      /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
+      /* we only need this for !monotonic clockor timers, but as we basically
+         always have timers, we just calculate it always */
       ev_now = ev_time ();
       if (flags & EVLOOP_NONBLOCK || idlecnt)
         block = 0.;
       else
       /* update ev_now, do magic */
       time_update ();
       /* queue pending timers and reschedule them */
+      timers_reify (); /* relative timers called last */
-      periodics_reify (); /* absolute timers first */
+      periodics_reify (); /* absolute timers called first */
-      timers_reify (); /* relative timers second */
       /* queue idle watchers unless io or timers are pending */
       if (!pendingcnt)
         queue_events ((W *)idles, idlecnt, EV_IDLE);
-      /* queue check and possibly idle watchers */
+      /* queue check watchers, to be executed first */
+      if (checkcnt)
-      queue_events ((W *)checks, checkcnt, EV_CHECK);
+        queue_events ((W *)checks, checkcnt, EV_CHECK);
       call_pending ();
     }
   while (!ev_loop_done);
   idles [w->active - 1] = idles [--idlecnt];
   ev_stop ((W)w);
 }
+void evprepare_start (struct ev_prepare *w)
+{
+  if (ev_is_active (w))
+    return;
+  ev_start ((W)w, ++preparecnt);
+  array_needsize (prepares, preparemax, preparecnt, );
+  prepares [preparecnt - 1] = w;
+}
+void evprepare_stop (struct ev_prepare *w)
+{
+  ev_clear ((W)w);
+  if (ev_is_active (w))
+    return;
+  prepares [w->active - 1] = prepares [--preparecnt];
+  ev_stop ((W)w);
+}
 void evcheck_start (struct ev_check *w)
 {
   if (ev_is_active (w))
     return;
   ev_clear ((W)w);
   if (ev_is_active (w))
     return;
   checks [w->active - 1] = checks [--checkcnt];
+  ev_stop ((W)w);
+}
+void evchild_start (struct ev_child *w)
+{
+  if (ev_is_active (w))
+    return;
+  ev_start ((W)w, 1);
+  wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
+}
+void evchild_stop (struct ev_child *w)
+{
+  ev_clear ((W)w);
+  if (ev_is_active (w))
+    return;
+  wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
   ev_stop ((W)w);
 }
 /*****************************************************************************/

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Comparing libev/ev.c (file contents): Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs. Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC