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

Comparing libev/ev.c (file contents):
Revision 1.345 by sf-exg, Sat Jul 31 22:33:26 2010 UTC vs.
Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC

  * and other provisions required by the GPL. If you do not delete the
  * provisions above, a recipient may use your version of this file under
  * either the BSD or the GPL.
  */
-#ifdef __cplusplus
-extern "C" {
-#endif
 /* this big block deduces configuration from config.h */
 #ifndef EV_STANDALONE
 # ifdef EV_CONFIG_H
 #  include EV_CONFIG_H
 # else
 # include EV_H
 #else
 # include "ev.h"
 #endif
+EV_CPP(extern "C" {)
 #ifndef _WIN32
 # include <sys/time.h>
 # include <sys/wait.h>
 # include <unistd.h>
 #else
 #  include <sys/select.h>
 # endif
 #endif
 #if EV_USE_INOTIFY
-# include <sys/utsname.h>
 # include <sys/statfs.h>
 # include <sys/inotify.h>
 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
 # ifndef IN_DONT_FOLLOW
 #  undef EV_USE_INOTIFY
 #   define EFD_CLOEXEC O_CLOEXEC
 #  else
 #   define EFD_CLOEXEC 02000000
 #  endif
 # endif
-# ifdef __cplusplus
-extern "C" {
-# endif
-int (eventfd) (unsigned int initval, int flags);
+EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
-# ifdef __cplusplus
-}
-# endif
 #endif
 #if EV_USE_SIGNALFD
 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
 # include <stdint.h>
 #   define SFD_CLOEXEC O_CLOEXEC
 #  else
 #   define SFD_CLOEXEC 02000000
 #  endif
 # endif
-# ifdef __cplusplus
-extern "C" {
-# endif
-int signalfd (int fd, const sigset_t *mask, int flags);
+EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
 struct signalfd_siginfo
 {
   uint32_t ssi_signo;
   char pad[128 - sizeof (uint32_t)];
 };
-# ifdef __cplusplus
-}
-# endif
+#endif
-#endif
 /**/
 #if EV_VERIFY >= 3
 # define EV_FREQUENT_CHECK ev_verify (EV_A)
 #define TIME_EPSILON  0.0001220703125 /* 1/8192 */
 #define MIN_TIMEJUMP  1. /* minimum timejump that gets detected (if monotonic clock available) */
 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
+#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
+#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
 #if __GNUC__ >= 4
 # define expect(expr,value)         __builtin_expect ((expr),(value))
 # define noinline                   __attribute__ ((noinline))
 #else
 # define expect(expr,value)         (expr)
 # include "ev_win32.c"
 #endif
 /*****************************************************************************/
+#ifdef __linux
+# include <sys/utsname.h>
+#endif
+static unsigned int noinline
+ev_linux_version (void)
+{
+#ifdef __linux
+  struct utsname buf;
+  unsigned int v;
+  int i;
+  char *p = buf.release;
+  if (uname (&buf))
+    return 0;
+  for (i = 3+1; --i; )
+    {
+      unsigned int c = 0;
+      for (;;)
+        {
+          if (*p >= '0' && *p <= '9')
+            c = c * 10 + *p++ - '0';
+          else
+            {
+              p += *p == '.';
+              break;
+            }
+        }
+      v = (v << 8) | c;
+    }
+  return v;
+#else
+  return 0;
+#endif
+}
+/*****************************************************************************/
 #if EV_AVOID_STDIO
 static void noinline
 ev_printerr (const char *msg)
 {
   write (STDERR_FILENO, msg, strlen (msg));
 # define EV_RELEASE_CB (void)0
 # define EV_ACQUIRE_CB (void)0
 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
 #endif
-#define EVUNLOOP_RECURSE 0x80
+#define EVBREAK_RECURSE 0x80
 /*****************************************************************************/
 #ifndef EV_HAVE_EV_TIME
 ev_tstamp
   if (delay > 0.)
     {
 #if EV_USE_NANOSLEEP
       struct timespec ts;
-      ts.tv_sec  = (time_t)delay;
+      EV_TS_SET (ts, delay);
-      ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
       nanosleep (&ts, 0);
 #elif defined(_WIN32)
       Sleep ((unsigned long)(delay * 1e3));
 #else
       struct timeval tv;
-      tv.tv_sec  = (time_t)delay;
-      tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
       /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
       /* something not guaranteed by newer posix versions, but guaranteed */
       /* by older ones */
+      EV_TV_SET (tv, delay);
       select (0, 0, 0, 0, &tv);
 #endif
     }
 }
     {
       int fd = fdchanges [i];
       ANFD *anfd = anfds + fd;
       ev_io *w;
-      unsigned char events = 0;
+      unsigned char o_events = anfd->events;
+      unsigned char o_reify  = anfd->reify;
-      for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
+      anfd->reify  = 0;
-        events |= (unsigned char)w->events;
 #if EV_SELECT_IS_WINSOCKET
-      if (events)
+      if (o_reify & EV__IOFDSET)
         {
           unsigned long arg;
           anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
           assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
         }
 #endif
+      /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
-      {
+        {
-        unsigned char o_events = anfd->events;
-        unsigned char o_reify  = anfd->reify;
-        anfd->reify  = 0;
-        anfd->events = events;
+          anfd->events = 0;
-        if (o_events != events || o_reify & EV__IOFDSET)
+          for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
+            anfd->events |= (unsigned char)w->events;
+          if (o_events != anfd->events)
+            o_reify = EV__IOFDSET; /* actually |= */
+        }
+      if (o_reify & EV__IOFDSET)
-          backend_modify (EV_A_ fd, o_events, events);
+        backend_modify (EV_A_ fd, o_events, anfd->events);
-      }
     }
   fdchangecnt = 0;
 }
           uint64_t counter = 1;
           write (evfd, &counter, sizeof (uint64_t));
         }
       else
 #endif
+        /* win32 people keep sending patches that change this write() to send() */
+        /* and then run away. but send() is wrong, it wants a socket handle on win32 */
+        /* so when you think this write should be a send instead, please find out */
+        /* where your send() is from - it's definitely not the microsoft send, and */
+        /* tell me. thank you. */
         write (evpipe [1], &dummy, 1);
       errno = old_errno;
     }
 }
     }
   else
 #endif
     {
       char dummy;
+      /* see discussion in evpipe_write when you think this read should be recv in win32 */
       read (evpipe [0], &dummy, 1);
     }
   if (sig_pending)
     {
 ev_embeddable_backends (void)
 {
   int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
   /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
-  /* please fix it and tell me how to detect the fix */
+  if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
-  flags &= ~EVBACKEND_EPOLL;
+    flags &= ~EVBACKEND_EPOLL;
   return flags;
 }
 unsigned int
       mn_now = ev_rt_now;
     }
 }
 void
-ev_loop (EV_P_ int flags)
+ev_run (EV_P_ int flags)
 {
 #if EV_FEATURE_API
   ++loop_depth;
 #endif
-  assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
+  assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
-  loop_done = EVUNLOOP_CANCEL;
+  loop_done = EVBREAK_CANCEL;
   EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
   do
     {
       /* calculate blocking time */
       {
         ev_tstamp waittime  = 0.;
         ev_tstamp sleeptime = 0.;
+        /* remember old timestamp for io_blocktime calculation */
+        ev_tstamp prev_mn_now = mn_now;
+        /* update time to cancel out callback processing overhead */
+        time_update (EV_A_ 1e100);
-        if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
+        if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
           {
-            /* remember old timestamp for io_blocktime calculation */
-            ev_tstamp prev_mn_now = mn_now;
-            /* update time to cancel out callback processing overhead */
-            time_update (EV_A_ 1e100);
             waittime = MAX_BLOCKTIME;
             if (timercnt)
               {
                 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
           }
 #if EV_FEATURE_API
         ++loop_count;
 #endif
-        assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
+        assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
         backend_poll (EV_A_ waittime);
-        assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
+        assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
         /* update ev_rt_now, do magic */
         time_update (EV_A_ waittime + sleeptime);
       }
       EV_INVOKE_PENDING;
     }
   while (expect_true (
     activecnt
     && !loop_done
-    && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
+    && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
   ));
-  if (loop_done == EVUNLOOP_ONE)
+  if (loop_done == EVBREAK_ONE)
-    loop_done = EVUNLOOP_CANCEL;
+    loop_done = EVBREAK_CANCEL;
 #if EV_FEATURE_API
   --loop_depth;
 #endif
 }
 void
-ev_unloop (EV_P_ int how)
+ev_break (EV_P_ int how)
 {
   loop_done = how;
 }
 void
   EV_FREQUENT_CHECK;
   wlist_del (&anfds[w->fd].head, (WL)w);
   ev_stop (EV_A_ (W)w);
-  fd_change (EV_A_ w->fd, 1);
+  fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
   EV_FREQUENT_CHECK;
 }
 void noinline
     {
       struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
       infy_wd (EV_A_ ev->wd, ev->wd, ev);
       ofs += sizeof (struct inotify_event) + ev->len;
     }
-}
-inline_size unsigned int
-ev_linux_version (void)
-{
-  struct utsname buf;
-  unsigned int v;
-  int i;
-  char *p = buf.release;
-  if (uname (&buf))
-    return 0;
-  for (i = 3+1; --i; )
-    {
-      unsigned int c = 0;
-      for (;;)
-        {
-          if (*p >= '0' && *p <= '9')
-            c = c * 10 + *p++ - '0';
-          else
-            {
-              p += *p == '.';
-              break;
-            }
-        }
-      v = (v << 8) | c;
-    }
-  return v;
 }
 inline_size void
 ev_check_2625 (EV_P)
 {
 #if EV_EMBED_ENABLE
 void noinline
 ev_embed_sweep (EV_P_ ev_embed *w)
 {
-  ev_loop (w->other, EVLOOP_NONBLOCK);
+  ev_run (w->other, EVRUN_NOWAIT);
 }
 static void
 embed_io_cb (EV_P_ ev_io *io, int revents)
 {
   ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
   if (ev_cb (w))
     ev_feed_event (EV_A_ (W)w, EV_EMBED);
   else
-    ev_loop (w->other, EVLOOP_NONBLOCK);
+    ev_run (w->other, EVRUN_NOWAIT);
 }
 static void
 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
 {
     EV_P = w->other;
     while (fdchangecnt)
       {
         fd_reify (EV_A);
-        ev_loop (EV_A_ EVLOOP_NONBLOCK);
+        ev_run (EV_A_ EVRUN_NOWAIT);
       }
   }
 }
 static void
   {
     EV_P = w->other;
     ev_loop_fork (EV_A);
-    ev_loop (EV_A_ EVLOOP_NONBLOCK);
+    ev_run (EV_A_ EVRUN_NOWAIT);
   }
   ev_embed_start (EV_A_ w);
 }
 void
 ev_async_start (EV_P_ ev_async *w)
 {
   if (expect_false (ev_is_active (w)))
     return;
+  w->sent = 0;
   evpipe_init (EV_A);
   EV_FREQUENT_CHECK;
 #if EV_MULTIPLICITY
   #include "ev_wrap.h"
 #endif
-#ifdef __cplusplus
+EV_CPP(})
-}
-#endif

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Comparing libev/ev.c (file contents): Revision 1.345 by sf-exg, Sat Jul 31 22:33:26 2010 UTC vs. Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.345 by sf-exg, Sat Jul 31 22:33:26 2010 UTC vs.
Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC