misc

[software/libev.git] / ev.c

diff --git a/ev.c b/ev.c
index 1e008e577c20de897833392a59416e384bf6c828..8c1337f60fedaae10bd73c4e526383089aa4fd76 100644 (file)
--- a/ev.c
+++ b/ev.c
@@ -113,9 +113,9 @@ extern "C" {
 #include <signal.h>
 
 #ifndef _WIN32
 #include <signal.h>
 
 #ifndef _WIN32

-# include <unistd.h>

 # include <sys/time.h>
 # include <sys/wait.h>
 # include <sys/time.h>
 # include <sys/wait.h>

+# include <unistd.h>

 #else
 # define WIN32_LEAN_AND_MEAN
 # include <windows.h>
 #else
 # define WIN32_LEAN_AND_MEAN
 # include <windows.h>


@@ -189,10 +189,19 @@ extern "C" {
 
 #if __GNUC__ >= 3
 # define expect(expr,value)         __builtin_expect ((expr),(value))
 
 #if __GNUC__ >= 3
 # define expect(expr,value)         __builtin_expect ((expr),(value))

-# define inline                     static inline
+# define inline_size                static inline /* inline for codesize */
+# if EV_MINIMAL
+#  define noinline                  __attribute__ ((noinline))
+#  define inline_speed              static noinline
+# else
+#  define noinline
+#  define inline_speed              static inline
+# endif

 #else
 # define expect(expr,value)         (expr)
 #else
 # define expect(expr,value)         (expr)

-# define inline                     static
+# define inline_speed               static
+# define inline_minimal             static
+# define noinline

 #endif
 
 #define expect_false(expr) expect ((expr) != 0, 0)
 #endif
 
 #define expect_false(expr) expect ((expr) != 0, 0)


@@ -218,12 +227,13 @@ static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
 
 static void (*syserr_cb)(const char *msg);
 
 
 static void (*syserr_cb)(const char *msg);
 

-void ev_set_syserr_cb (void (*cb)(const char *msg))
+void
+ev_set_syserr_cb (void (*cb)(const char *msg))

 {
   syserr_cb = cb;
 }
 
 {
   syserr_cb = cb;
 }
 

-static void
+static void noinline

 syserr (const char *msg)
 {
   if (!msg)
 syserr (const char *msg)
 {
   if (!msg)


@@ -240,7 +250,8 @@ syserr (const char *msg)
 
 static void *(*alloc)(void *ptr, long size);
 
 
 static void *(*alloc)(void *ptr, long size);
 

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

 {
   alloc = cb;
 }
 {
   alloc = cb;
 }


@@ -322,7 +333,7 @@ ev_time (void)
 #endif
 }
 
 #endif
 }
 

-inline ev_tstamp
+ev_tstamp inline_size

 get_clock (void)
 {
 #if EV_USE_MONOTONIC
 get_clock (void)
 {
 #if EV_USE_MONOTONIC


@@ -375,20 +386,7 @@ ev_now (EV_P)
 
 /*****************************************************************************/
 
 
 /*****************************************************************************/
 

-static void
-anfds_init (ANFD *base, int count)
-{
-  while (count--)
-    {
-      base->head   = 0;
-      base->events = EV_NONE;
-      base->reify  = 0;
-
-      ++base;
-    }
-}
-
-void
+void noinline

 ev_feed_event (EV_P_ void *w, int revents)
 {
   W w_ = (W)w;
 ev_feed_event (EV_P_ void *w, int revents)
 {
   W w_ = (W)w;


@@ -405,7 +403,7 @@ ev_feed_event (EV_P_ void *w, int revents)
   pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
 }
 
   pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
 }
 

-static void
+void inline_size

 queue_events (EV_P_ W *events, int eventcnt, int type)
 {
   int i;
 queue_events (EV_P_ W *events, int eventcnt, int type)
 {
   int i;


@@ -414,7 +412,22 @@ queue_events (EV_P_ W *events, int eventcnt, int type)
     ev_feed_event (EV_A_ events [i], type);
 }
 
     ev_feed_event (EV_A_ events [i], type);
 }
 

-inline void
+/*****************************************************************************/
+
+void inline_size
+anfds_init (ANFD *base, int count)
+{
+  while (count--)
+    {
+      base->head   = 0;
+      base->events = EV_NONE;
+      base->reify  = 0;
+
+      ++base;
+    }
+}
+
+void inline_speed

 fd_event (EV_P_ int fd, int revents)
 {
   ANFD *anfd = anfds + fd;
 fd_event (EV_P_ int fd, int revents)
 {
   ANFD *anfd = anfds + fd;


@@ -435,9 +448,7 @@ ev_feed_fd_event (EV_P_ int fd, int revents)
   fd_event (EV_A_ fd, revents);
 }
 
   fd_event (EV_A_ fd, revents);
 }
 

-/*****************************************************************************/
-
-inline void
+void inline_size

 fd_reify (EV_P)
 {
   int i;
 fd_reify (EV_P)
 {
   int i;


@@ -471,7 +482,7 @@ fd_reify (EV_P)
   fdchangecnt = 0;
 }
 
   fdchangecnt = 0;
 }
 

-static void
+void inline_size

 fd_change (EV_P_ int fd)
 {
   if (expect_false (anfds [fd].reify))
 fd_change (EV_P_ int fd)
 {
   if (expect_false (anfds [fd].reify))


@@ -484,7 +495,7 @@ fd_change (EV_P_ int fd)
   fdchanges [fdchangecnt - 1] = fd;
 }
 
   fdchanges [fdchangecnt - 1] = fd;
 }
 

-static void
+void inline_speed

 fd_kill (EV_P_ int fd)
 {
   ev_io *w;
 fd_kill (EV_P_ int fd)
 {
   ev_io *w;


@@ -496,7 +507,7 @@ fd_kill (EV_P_ int fd)
     }
 }
 
     }
 }
 

-inline int
+int inline_size

 fd_valid (int fd)
 {
 #ifdef _WIN32
 fd_valid (int fd)
 {
 #ifdef _WIN32


@@ -507,7 +518,7 @@ fd_valid (int fd)
 }
 
 /* called on EBADF to verify fds */
 }
 
 /* called on EBADF to verify fds */

-static void
+static void noinline

 fd_ebadf (EV_P)
 {
   int fd;
 fd_ebadf (EV_P)
 {
   int fd;


@@ -519,7 +530,7 @@ fd_ebadf (EV_P)
 }
 
 /* called on ENOMEM in select/poll to kill some fds and retry */
 }
 
 /* called on ENOMEM in select/poll to kill some fds and retry */

-static void
+static void noinline

 fd_enomem (EV_P)
 {
   int fd;
 fd_enomem (EV_P)
 {
   int fd;


@@ -533,7 +544,7 @@ fd_enomem (EV_P)
 }
 
 /* usually called after fork if backend needs to re-arm all fds from scratch */
 }
 
 /* usually called after fork if backend needs to re-arm all fds from scratch */

-static void
+static void noinline

 fd_rearm_all (EV_P)
 {
   int fd;
 fd_rearm_all (EV_P)
 {
   int fd;


@@ -549,7 +560,7 @@ fd_rearm_all (EV_P)
 
 /*****************************************************************************/
 
 
 /*****************************************************************************/
 

-static void
+void inline_speed

 upheap (WT *heap, int k)
 {
   WT w = heap [k];
 upheap (WT *heap, int k)
 {
   WT w = heap [k];


@@ -566,7 +577,7 @@ upheap (WT *heap, int k)
 
 }
 
 
 }
 

-static void
+void inline_speed

 downheap (WT *heap, int N, int k)
 {
   WT w = heap [k];
 downheap (WT *heap, int N, int k)
 {
   WT w = heap [k];


@@ -590,7 +601,7 @@ downheap (WT *heap, int N, int k)
   ((W)heap [k])->active = k + 1;
 }
 
   ((W)heap [k])->active = k + 1;
 }
 

-inline void
+void inline_size

 adjustheap (WT *heap, int N, int k)
 {
   upheap (heap, k);
 adjustheap (WT *heap, int N, int k)
 {
   upheap (heap, k);


@@ -612,7 +623,7 @@ static int sigpipe [2];
 static sig_atomic_t volatile gotsig;
 static ev_io sigev;
 
 static sig_atomic_t volatile gotsig;
 static ev_io sigev;
 

-static void
+void inline_size

 signals_init (ANSIG *base, int count)
 {
   while (count--)
 signals_init (ANSIG *base, int count)
 {
   while (count--)


@@ -642,7 +653,7 @@ sighandler (int signum)
     }
 }
 
     }
 }
 

-void
+void noinline

 ev_feed_signal_event (EV_P_ int signum)
 {
   WL w;
 ev_feed_signal_event (EV_P_ int signum)
 {
   WL w;


@@ -675,7 +686,7 @@ sigcb (EV_P_ ev_io *iow, int revents)
       ev_feed_signal_event (EV_A_ signum + 1);
 }
 
       ev_feed_signal_event (EV_A_ signum + 1);
 }
 

-static void
+void inline_size

 fd_intern (int fd)
 {
 #ifdef _WIN32
 fd_intern (int fd)
 {
 #ifdef _WIN32


@@ -687,7 +698,7 @@ fd_intern (int fd)
 #endif
 }
 
 #endif
 }
 

-static void
+static void noinline

 siginit (EV_P)
 {
   fd_intern (sigpipe [0]);
 siginit (EV_P)
 {
   fd_intern (sigpipe [0]);


@@ -710,7 +721,7 @@ static ev_signal childev;
 # define WCONTINUED 0
 #endif
 
 # define WCONTINUED 0
 #endif
 

-static void
+void inline_speed

 child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
 {
   ev_child *w;
 child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
 {
   ev_child *w;


@@ -774,7 +785,7 @@ ev_version_minor (void)
 }
 
 /* return true if we are running with elevated privileges and should ignore env variables */
 }
 
 /* return true if we are running with elevated privileges and should ignore env variables */

-static int
+int inline_size

 enable_secure (void)
 {
 #ifdef _WIN32
 enable_secure (void)
 {
 #ifdef _WIN32


@@ -906,7 +917,7 @@ loop_destroy (EV_P)
   /* have to use the microsoft-never-gets-it-right macro */
   array_free (fdchange, EMPTY0);
   array_free (timer, EMPTY0);
   /* have to use the microsoft-never-gets-it-right macro */
   array_free (fdchange, EMPTY0);
   array_free (timer, EMPTY0);

-#if EV_PERIODICS
+#if EV_PERIODIC_ENABLE

   array_free (periodic, EMPTY0);
 #endif
   array_free (idle, EMPTY0);
   array_free (periodic, EMPTY0);
 #endif
   array_free (idle, EMPTY0);


@@ -1052,7 +1063,7 @@ ev_default_fork (void)
 
 /*****************************************************************************/
 
 
 /*****************************************************************************/
 

-static int
+int inline_size

 any_pending (EV_P)
 {
   int pri;
 any_pending (EV_P)
 {
   int pri;


@@ -1064,7 +1075,7 @@ any_pending (EV_P)
   return 0;
 }
 
   return 0;
 }
 

-inline void
+void inline_speed

 call_pending (EV_P)
 {
   int pri;
 call_pending (EV_P)
 {
   int pri;


@@ -1076,13 +1087,15 @@ call_pending (EV_P)
 
         if (expect_true (p->w))
           {
 
         if (expect_true (p->w))
           {

+            assert (("non-pending watcher on pending list", p->w->pending));
+

             p->w->pending = 0;
             EV_CB_INVOKE (p->w, p->events);
           }
       }
 }
 
             p->w->pending = 0;
             EV_CB_INVOKE (p->w, p->events);
           }
       }
 }
 

-inline void
+void inline_size

 timers_reify (EV_P)
 {
   while (timercnt && ((WT)timers [0])->at <= mn_now)
 timers_reify (EV_P)
 {
   while (timercnt && ((WT)timers [0])->at <= mn_now)


@@ -1109,8 +1122,8 @@ timers_reify (EV_P)
     }
 }
 
     }
 }
 

-#if EV_PERIODICS
-inline void
+#if EV_PERIODIC_ENABLE
+void inline_size

 periodics_reify (EV_P)
 {
   while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
 periodics_reify (EV_P)
 {
   while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)


@@ -1139,7 +1152,7 @@ periodics_reify (EV_P)
     }
 }
 
     }
 }
 

-static void
+static void noinline

 periodics_reschedule (EV_P)
 {
   int i;
 periodics_reschedule (EV_P)
 {
   int i;


@@ -1161,7 +1174,7 @@ periodics_reschedule (EV_P)
 }
 #endif
 
 }
 #endif
 

-inline int
+int inline_size

 time_update_monotonic (EV_P)
 {
   mn_now = get_clock ();
 time_update_monotonic (EV_P)
 {
   mn_now = get_clock ();


@@ -1179,7 +1192,7 @@ time_update_monotonic (EV_P)
     }
 }
 
     }
 }
 

-inline void
+void inline_size

 time_update (EV_P)
 {
   int i;
 time_update (EV_P)
 {
   int i;


@@ -1191,7 +1204,15 @@ time_update (EV_P)
         {
           ev_tstamp odiff = rtmn_diff;
 
         {
           ev_tstamp odiff = rtmn_diff;
 

-          for (i = 4; --i; ) /* loop a few times, before making important decisions */
+          /* 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
+           * 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.
+           */
+          for (i = 4; --i; )

             {
               rtmn_diff = ev_rt_now - mn_now;
 
             {
               rtmn_diff = ev_rt_now - mn_now;
 


@@ -1203,7 +1224,7 @@ time_update (EV_P)
               now_floor = mn_now;
             }
 
               now_floor = mn_now;
             }
 

-# if EV_PERIODICS
+# if EV_PERIODIC_ENABLE

           periodics_reschedule (EV_A);
 # endif
           /* no timer adjustment, as the monotonic clock doesn't jump */
           periodics_reschedule (EV_A);
 # endif
           /* no timer adjustment, as the monotonic clock doesn't jump */


@@ -1217,7 +1238,7 @@ time_update (EV_P)
 
       if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
         {
 
       if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
         {

-#if EV_PERIODICS
+#if EV_PERIODIC_ENABLE

           periodics_reschedule (EV_A);
 #endif
 
           periodics_reschedule (EV_A);
 #endif
 


@@ -1294,7 +1315,7 @@ ev_loop (EV_P_ int flags)
                 if (block > to) block = to;
               }
 
                 if (block > to) block = to;
               }
 

-#if EV_PERIODICS
+#if EV_PERIODIC_ENABLE

             if (periodiccnt)
               {
                 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
             if (periodiccnt)
               {
                 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;


@@ -1313,7 +1334,7 @@ ev_loop (EV_P_ int flags)
 
       /* queue pending timers and reschedule them */
       timers_reify (EV_A); /* relative timers called last */
 
       /* queue pending timers and reschedule them */
       timers_reify (EV_A); /* relative timers called last */

-#if EV_PERIODICS
+#if EV_PERIODIC_ENABLE

       periodics_reify (EV_A); /* absolute timers called first */
 #endif
 
       periodics_reify (EV_A); /* absolute timers called first */
 #endif
 


@@ -1343,14 +1364,14 @@ ev_unloop (EV_P_ int how)
 
 /*****************************************************************************/
 
 
 /*****************************************************************************/
 

-inline void
+void inline_size

 wlist_add (WL *head, WL elem)
 {
   elem->next = *head;
   *head = elem;
 }
 
 wlist_add (WL *head, WL elem)
 {
   elem->next = *head;
   *head = elem;
 }
 

-inline void
+void inline_size

 wlist_del (WL *head, WL elem)
 {
   while (*head)
 wlist_del (WL *head, WL elem)
 {
   while (*head)


@@ -1365,7 +1386,7 @@ wlist_del (WL *head, WL elem)
     }
 }
 
     }
 }
 

-inline void
+void inline_speed

 ev_clear_pending (EV_P_ W w)
 {
   if (w->pending)
 ev_clear_pending (EV_P_ W w)
 {
   if (w->pending)


@@ -1375,7 +1396,7 @@ ev_clear_pending (EV_P_ W w)
     }
 }
 
     }
 }
 

-inline void
+void inline_speed

 ev_start (EV_P_ W w, int active)
 {
   if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
 ev_start (EV_P_ W w, int active)
 {
   if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;


@@ -1385,7 +1406,7 @@ ev_start (EV_P_ W w, int active)
   ev_ref (EV_A);
 }
 
   ev_ref (EV_A);
 }
 

-inline void
+void inline_size

 ev_stop (EV_P_ W w)
 {
   ev_unref (EV_A);
 ev_stop (EV_P_ W w)
 {
   ev_unref (EV_A);


@@ -1484,7 +1505,7 @@ ev_timer_again (EV_P_ ev_timer *w)
     }
 }
 
     }
 }
 

-#if EV_PERIODICS
+#if EV_PERIODIC_ENABLE

 void
 ev_periodic_start (EV_P_ ev_periodic *w)
 {
 void
 ev_periodic_start (EV_P_ ev_periodic *w)
 {


@@ -1553,7 +1574,12 @@ ev_idle_stop (EV_P_ ev_idle *w)
   if (expect_false (!ev_is_active (w)))
     return;
 
   if (expect_false (!ev_is_active (w)))
     return;
 

-  idles [((W)w)->active - 1] = idles [--idlecnt];
+  {
+    int active = ((W)w)->active;
+    idles [active - 1] = idles [--idlecnt];
+    ((W)idles [active - 1])->active = active;
+  }
+

   ev_stop (EV_A_ (W)w);
 }
 
   ev_stop (EV_A_ (W)w);
 }
 


@@ -1575,7 +1601,12 @@ ev_prepare_stop (EV_P_ ev_prepare *w)
   if (expect_false (!ev_is_active (w)))
     return;
 
   if (expect_false (!ev_is_active (w)))
     return;
 

-  prepares [((W)w)->active - 1] = prepares [--preparecnt];
+  {
+    int active = ((W)w)->active;
+    prepares [active - 1] = prepares [--preparecnt];
+    ((W)prepares [active - 1])->active = active;
+  }
+

   ev_stop (EV_A_ (W)w);
 }
 
   ev_stop (EV_A_ (W)w);
 }
 


@@ -1597,7 +1628,12 @@ ev_check_stop (EV_P_ ev_check *w)
   if (expect_false (!ev_is_active (w)))
     return;
 
   if (expect_false (!ev_is_active (w)))
     return;
 

-  checks [((W)w)->active - 1] = checks [--checkcnt];
+  {
+    int active = ((W)w)->active;
+    checks [active - 1] = checks [--checkcnt];
+    ((W)checks [active - 1])->active = active;
+  }
+

   ev_stop (EV_A_ (W)w);
 }
 
   ev_stop (EV_A_ (W)w);
 }
 


@@ -1672,8 +1708,8 @@ ev_child_stop (EV_P_ ev_child *w)
   ev_stop (EV_A_ (W)w);
 }
 
   ev_stop (EV_A_ (W)w);
 }
 

-#if EV_MULTIPLICITY
-void
+#if EV_EMBED_ENABLE
+void noinline

 ev_embed_sweep (EV_P_ ev_embed *w)
 {
   ev_loop (w->loop, EVLOOP_NONBLOCK);
 ev_embed_sweep (EV_P_ ev_embed *w)
 {
   ev_loop (w->loop, EVLOOP_NONBLOCK);


@@ -1704,6 +1740,7 @@ ev_embed_start (EV_P_ ev_embed *w)
 
   ev_set_priority (&w->io, ev_priority (w));
   ev_io_start (EV_A_ &w->io);
 
   ev_set_priority (&w->io, ev_priority (w));
   ev_io_start (EV_A_ &w->io);

+

   ev_start (EV_A_ (W)w, 1);
 }
 
   ev_start (EV_A_ (W)w, 1);
 }
 


@@ -1715,6 +1752,68 @@ ev_embed_stop (EV_P_ ev_embed *w)
     return;
 
   ev_io_stop (EV_A_ &w->io);
     return;
 
   ev_io_stop (EV_A_ &w->io);

+
+  ev_stop (EV_A_ (W)w);
+}
+#endif
+
+#if EV_STAT_ENABLE
+
+# ifdef _WIN32
+#  define lstat(a,b) stat(a,b)
+# endif
+
+void
+ev_stat_stat (EV_P_ ev_stat *w)
+{
+  if (lstat (w->path, &w->attr) < 0)
+    w->attr.st_nlink = 0;
+  else if (!w->attr.st_nlink)
+    w->attr.st_nlink = 1;
+}
+
+static void
+stat_timer_cb (EV_P_ ev_timer *w_, int revents)
+{
+  ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
+
+  /* we copy this here each the time so that */
+  /* prev has the old value when the callback gets invoked */
+  w->prev = w->attr;
+  ev_stat_stat (EV_A_ w);
+
+  if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
+    ev_feed_event (EV_A_ w, EV_STAT);
+}
+
+void
+ev_stat_start (EV_P_ ev_stat *w)
+{
+  if (expect_false (ev_is_active (w)))
+    return;
+
+  /* since we use memcmp, we need to clear any padding data etc. */
+  memset (&w->prev, 0, sizeof (ev_statdata));
+  memset (&w->attr, 0, sizeof (ev_statdata));
+
+  ev_stat_stat (EV_A_ w);
+
+  ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
+  ev_set_priority (&w->timer, ev_priority (w));
+  ev_timer_start (EV_A_ &w->timer);
+
+  ev_start (EV_A_ (W)w, 1);
+}
+
+void
+ev_stat_stop (EV_P_ ev_stat *w)
+{
+  ev_clear_pending (EV_A_ (W)w);
+  if (expect_false (!ev_is_active (w)))
+    return;
+
+  ev_timer_stop (EV_A_ &w->timer);
+

   ev_stop (EV_A_ (W)w);
 }
 #endif
   ev_stop (EV_A_ (W)w);
 }
 #endif