braino

[software/libev.git] / ev.c

diff --git a/ev.c b/ev.c
index 0d5e4b9d6bed5899d3ba68f558dd763ab5076cc0..9f7e2bedbf643e053c7177683601f3c40e83d4fd 100644 (file)
--- a/ev.c
+++ b/ev.c
@@ -283,22 +283,22 @@ syserr (const char *msg)
     }
 }
 
     }
 }
 

-static void *(*alloc)(void *ptr, size_t size) = realloc;
+static void *(*alloc)(void *ptr, long size);

 
 void
 
 void

-ev_set_allocator (void *(*cb)(void *ptr, size_t size))
+ev_set_allocator (void *(*cb)(void *ptr, long size))

 {
   alloc = cb;
 }
 
 inline_speed void *
 {
   alloc = cb;
 }
 
 inline_speed void *

-ev_realloc (void *ptr, size_t size)
+ev_realloc (void *ptr, long size)

 {
 {

-  ptr = alloc (ptr, size);
+  ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);

 
   if (!ptr && size)
     {
 
   if (!ptr && size)
     {

-      fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size);
+      fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);

       abort ();
     }
 
       abort ();
     }
 


@@ -326,12 +326,12 @@ typedef struct
   int events;
 } ANPENDING;
 
   int events;
 } ANPENDING;
 

+#if EV_USE_INOTIFY

 typedef struct
 {
 typedef struct
 {

-#if EV_USE_INOTIFY

   WL head;
   WL head;

-#endif

 } ANFS;
 } ANFS;

+#endif

 
 #if EV_MULTIPLICITY
 
 
 #if EV_MULTIPLICITY
 


@@ -591,7 +591,6 @@ fd_rearm_all (EV_P)
 {
   int fd;
 
 {
   int fd;
 

-  /* this should be highly optimised to not do anything but set a flag */

   for (fd = 0; fd < anfdmax; ++fd)
     if (anfds [fd].events)
       {
   for (fd = 0; fd < anfdmax; ++fd)
     if (anfds [fd].events)
       {


@@ -907,6 +906,12 @@ loop_init (EV_P_ unsigned int flags)
       now_floor = mn_now;
       rtmn_diff = ev_rt_now - mn_now;
 
       now_floor = mn_now;
       rtmn_diff = ev_rt_now - mn_now;
 

+      /* pid check not overridable via env */
+#ifndef _WIN32
+      if (flags & EVFLAG_FORKCHECK)
+        curpid = getpid ();
+#endif
+

       if (!(flags & EVFLAG_NOENV)
           && !enable_secure ()
           && getenv ("LIBEV_FLAGS"))
       if (!(flags & EVFLAG_NOENV)
           && !enable_secure ()
           && getenv ("LIBEV_FLAGS"))


@@ -987,6 +992,8 @@ loop_destroy (EV_P)
   backend = 0;
 }
 
   backend = 0;
 }
 

+void inline_size infy_fork (EV_P);
+

 void inline_size
 loop_fork (EV_P)
 {
 void inline_size
 loop_fork (EV_P)
 {


@@ -999,6 +1006,9 @@ loop_fork (EV_P)
 #if EV_USE_EPOLL
   if (backend == EVBACKEND_EPOLL ) epoll_fork  (EV_A);
 #endif
 #if EV_USE_EPOLL
   if (backend == EVBACKEND_EPOLL ) epoll_fork  (EV_A);
 #endif

+#if EV_USE_INOTIFY
+  infy_fork (EV_A);
+#endif

 
   if (ev_is_active (&sigev))
     {
 
   if (ev_is_active (&sigev))
     {


@@ -1267,10 +1277,10 @@ time_update (EV_P)
           /* loop a few times, before making important decisions.
            * on the choice of "4": one iteration isn't enough,
            * in case we get preempted during the calls to
           /* loop a few times, before making important decisions.
            * on the choice of "4": one iteration isn't enough,
            * in case we get preempted during the calls to

-           * ev_time and get_clock. a second call is almost guarenteed
+           * ev_time and get_clock. a second call is almost guaranteed

            * to succeed in that case, though. and looping a few more times
            * doesn't hurt either as we only do this on time-jumps or
            * to succeed in that case, though. and looping a few more times
            * doesn't hurt either as we only do this on time-jumps or

-           * in the unlikely event of getting preempted here.
+           * in the unlikely event of having been preempted here.

            */
           for (i = 4; --i; )
             {
            */
           for (i = 4; --i; )
             {


@@ -1302,7 +1312,7 @@ time_update (EV_P)
           periodics_reschedule (EV_A);
 #endif
 
           periodics_reschedule (EV_A);
 #endif
 

-          /* adjust timers. this is easy, as the offset is the same for all */
+          /* 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;
         }
           for (i = 0; i < timercnt; ++i)
             ((WT)timers [i])->at += ev_rt_now - mn_now;
         }


@@ -1332,17 +1342,28 @@ ev_loop (EV_P_ int flags)
             ? EVUNLOOP_ONE
             : EVUNLOOP_CANCEL;
 
             ? EVUNLOOP_ONE
             : EVUNLOOP_CANCEL;
 

-  while (activecnt)
+  call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
+
+  do

     {
     {

-      /* we might have forked, so reify kernel state if necessary */
-      #if EV_FORK_ENABLE
-        if (expect_false (postfork))
-          if (forkcnt)
-            {
-              queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
-              call_pending (EV_A);
-            }
-      #endif
+#ifndef _WIN32
+      if (expect_false (curpid)) /* penalise the forking check even more */
+        if (expect_false (getpid () != curpid))
+          {
+            curpid = getpid ();
+            postfork = 1;
+          }
+#endif
+
+#if EV_FORK_ENABLE
+      /* we might have forked, so queue fork handlers */
+      if (expect_false (postfork))
+        if (forkcnt)
+          {
+            queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
+            call_pending (EV_A);
+          }
+#endif

 
       /* queue check watchers (and execute them) */
       if (expect_false (preparecnt))
 
       /* queue check watchers (and execute them) */
       if (expect_false (preparecnt))


@@ -1351,6 +1372,9 @@ ev_loop (EV_P_ int flags)
           call_pending (EV_A);
         }
 
           call_pending (EV_A);
         }
 

+      if (expect_false (!activecnt))
+        break;
+

       /* we might have forked, so reify kernel state if necessary */
       if (expect_false (postfork))
         loop_fork (EV_A);
       /* we might have forked, so reify kernel state if necessary */
       if (expect_false (postfork))
         loop_fork (EV_A);


@@ -1360,9 +1384,9 @@ ev_loop (EV_P_ int flags)
 
       /* calculate blocking time */
       {
 
       /* calculate blocking time */
       {

-        double block;
+        ev_tstamp block;

 
 

-        if (flags & EVLOOP_NONBLOCK || idlecnt)
+        if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt))

           block = 0.; /* do not block at all */
         else
           {
           block = 0.; /* do not block at all */
         else
           {


@@ -1418,9 +1442,8 @@ ev_loop (EV_P_ int flags)
 
       call_pending (EV_A);
 
 
       call_pending (EV_A);
 

-      if (expect_false (loop_done))
-        break;

     }
     }

+  while (expect_true (activecnt && !loop_done));

 
   if (loop_done == EVUNLOOP_ONE)
     loop_done = EVUNLOOP_CANCEL;
 
   if (loop_done == EVUNLOOP_ONE)
     loop_done = EVUNLOOP_CANCEL;


@@ -1715,10 +1738,10 @@ ev_child_stop (EV_P_ ev_child *w)
 #define DEF_STAT_INTERVAL 5.0074891
 #define MIN_STAT_INTERVAL 0.1074891
 
 #define DEF_STAT_INTERVAL 5.0074891
 #define MIN_STAT_INTERVAL 0.1074891
 

-void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
+static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);

 
 #if EV_USE_INOTIFY
 
 #if EV_USE_INOTIFY

-# define EV_INOTIFY_BUFSIZE ((PATH_MAX + sizeof (struct inotify_event)) + 2048)
+# define EV_INOTIFY_BUFSIZE 8192

 
 static void noinline
 infy_add (EV_P_ ev_stat *w)
 
 static void noinline
 infy_add (EV_P_ ev_stat *w)


@@ -1730,9 +1753,9 @@ infy_add (EV_P_ ev_stat *w)
       ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
 
       /* monitor some parent directory for speedup hints */
       ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
 
       /* monitor some parent directory for speedup hints */

-      if (errno == ENOENT || errno == EACCES)
+      if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)

         {
         {

-          char path [PATH_MAX];
+          char path [4096];

           strcpy (path, w->path);
 
           do
           strcpy (path, w->path);
 
           do


@@ -1746,7 +1769,7 @@ infy_add (EV_P_ ev_stat *w)
                 break; /* whoops, no '/', complain to your admin */
 
               *pend = 0;
                 break; /* whoops, no '/', complain to your admin */
 
               *pend = 0;

-              w->wd = inotify_add_watch (fs_fd, path, IN_DELETE_SELF | IN_CREATE | IN_MOVED_TO | IN_MASK_ADD);
+              w->wd = inotify_add_watch (fs_fd, path, mask);

             } 
           while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
         }
             } 
           while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
         }


@@ -1761,7 +1784,6 @@ infy_add (EV_P_ ev_stat *w)
 static void noinline
 infy_del (EV_P_ ev_stat *w)
 {
 static void noinline
 infy_del (EV_P_ ev_stat *w)
 {

-  WL w_;

   int slot;
   int wd = w->wd;
 
   int slot;
   int wd = w->wd;
 


@@ -1800,7 +1822,7 @@ infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
                   infy_add (EV_A_ w); /* re-add, no matter what */
                 }
 
                   infy_add (EV_A_ w); /* re-add, no matter what */
                 }
 

-              stat_timer_cb (EV_P_ &w->timer, 0);
+              stat_timer_cb (EV_A_ &w->timer, 0);

             }
         }
     }
             }
         }
     }


@@ -1834,6 +1856,38 @@ infy_init (EV_P)
     }
 }
 
     }
 }
 

+void inline_size
+infy_fork (EV_P)
+{
+  int slot;
+
+  if (fs_fd < 0)
+    return;
+
+  close (fs_fd);
+  fs_fd = inotify_init ();
+
+  for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
+    {
+      WL w_ = fs_hash [slot].head;
+      fs_hash [slot].head = 0;
+
+      while (w_)
+        {
+          ev_stat *w = (ev_stat *)w_;
+          w_ = w_->next; /* lets us add this watcher */
+
+          w->wd = -1;
+
+          if (fs_fd >= 0)
+            infy_add (EV_A_ w); /* re-add, no matter what */
+          else
+            ev_timer_start (EV_A_ &w->timer);
+        }
+
+    }
+}
+

 #endif
 
 void
 #endif
 
 void


@@ -1845,7 +1899,7 @@ ev_stat_stat (EV_P_ ev_stat *w)
     w->attr.st_nlink = 1;
 }
 
     w->attr.st_nlink = 1;
 }
 

-void noinline
+static void noinline

 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
 {
   ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
 {
   ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));


@@ -1855,8 +1909,20 @@ stat_timer_cb (EV_P_ ev_timer *w_, int revents)
   w->prev = w->attr;
   ev_stat_stat (EV_A_ w);
 
   w->prev = w->attr;
   ev_stat_stat (EV_A_ w);
 

-  if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
-    {
+  /* 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
+  ) {

       #if EV_USE_INOTIFY
         infy_del (EV_A_ w);
         infy_add (EV_A_ w);
       #if EV_USE_INOTIFY
         infy_del (EV_A_ w);
         infy_add (EV_A_ w);