X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/48151275f9dd2099bb2e98f47a341678182d9230..3ef16649fd7310725554cffb8b24fdcefa4a5eb1:/ev.c?ds=inline

diff --git a/ev.c b/ev.c
index 8a32229..9737950 100644
--- a/ev.c
+++ b/ev.c
@@ -28,6 +28,11 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef EV_STANDALONE
 # include "config.h"
 
@@ -48,7 +53,7 @@
 #  define EV_USE_EPOLL 1
 # endif
 
-# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
+# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
 #  define EV_USE_KQUEUE 1
 # endif
 
@@ -128,7 +133,11 @@
 #define PID_HASHSIZE  16 /* size of pid hash table, must be power of two */
 /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
 
-#include "ev.h"
+#ifdef EV_H
+# include EV_H
+#else
+# include "ev.h"
+#endif
 
 #if __GNUC__ >= 3
 # define expect(expr,value)         __builtin_expect ((expr),(value))
@@ -217,25 +226,32 @@ typedef struct
 
 #if EV_MULTIPLICITY
 
-struct ev_loop
-{
-# define VAR(name,decl) decl;
-# include "ev_vars.h"
-};
-# undef VAR
-# include "ev_wrap.h"
+  struct ev_loop
+  {
+    ev_tstamp ev_rt_now;
+    #define VAR(name,decl) decl;
+      #include "ev_vars.h"
+    #undef VAR
+  };
+  #include "ev_wrap.h"
+
+  struct ev_loop default_loop_struct;
+  static struct ev_loop *default_loop;
 
 #else
 
-# define VAR(name,decl) static decl;
-# include "ev_vars.h"
-# undef VAR
+  ev_tstamp ev_rt_now;
+  #define VAR(name,decl) static decl;
+    #include "ev_vars.h"
+  #undef VAR
+
+  static int default_loop;
 
 #endif
 
 /*****************************************************************************/
 
-inline ev_tstamp
+ev_tstamp
 ev_time (void)
 {
 #if EV_USE_REALTIME
@@ -264,11 +280,13 @@ get_clock (void)
   return ev_time ();
 }
 
+#if EV_MULTIPLICITY
 ev_tstamp
 ev_now (EV_P)
 {
-  return rt_now;
+  return ev_rt_now;
 }
+#endif
 
 #define array_roundsize(type,n) ((n) | 4 & ~3)
 
@@ -344,21 +362,27 @@ queue_events (EV_P_ W *events, int eventcnt, int type)
     ev_feed_event (EV_A_ events [i], type);
 }
 
-static void
-fd_event (EV_P_ int fd, int events)
+inline void
+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)
         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
@@ -505,6 +529,18 @@ downheap (WT *heap, int N, int k)
   ((W)heap [k])->active = k + 1;
 }
 
+inline void
+adjustheap (WT *heap, int N, int k, ev_tstamp at)
+{
+  ev_tstamp old_at = heap [k]->at;
+  heap [k]->at = at;
+
+  if (old_at < at)
+    downheap (heap, N, k);
+  else
+    upheap (heap, k);
+}
+
 /*****************************************************************************/
 
 typedef struct
@@ -554,10 +590,29 @@ sighandler (int signum)
     }
 }
 
+void
+ev_feed_signal_event (EV_P_ int signum)
+{
+  WL w;
+
+#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
@@ -569,12 +624,7 @@ sigcb (EV_P_ struct ev_io *iow, int revents)
 
   for (signum = signalmax; signum--; )
     if (signals [signum].gotsig)
-      {
-        signals [signum].gotsig = 0;
-
-        for (w = signals [signum].head; w; w = w->next)
-          ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
-      }
+      ev_feed_signal_event (EV_A_ signum + 1);
 }
 
 static void
@@ -696,10 +746,10 @@ loop_init (EV_P_ int methods)
       }
 #endif
 
-      rt_now    = ev_time ();
+      ev_rt_now = ev_time ();
       mn_now    = get_clock ();
       now_floor = mn_now;
-      rtmn_diff = rt_now - mn_now;
+      rtmn_diff = ev_rt_now - mn_now;
 
       if (methods == EVMETHOD_AUTO)
         if (!enable_secure () && getenv ("LIBEV_METHODS"))
@@ -724,7 +774,7 @@ loop_init (EV_P_ int methods)
       if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
 #endif
 
-      ev_watcher_init (&sigev, sigcb);
+      ev_init (&sigev, sigcb);
       ev_set_priority (&sigev, EV_MAXPRI);
     }
 }
@@ -756,7 +806,9 @@ loop_destroy (EV_P)
   /* have to use the microsoft-never-gets-it-right macro */
   array_free_microshit (fdchange);
   array_free_microshit (timer);
+#if EV_PERIODICS
   array_free_microshit (periodic);
+#endif
   array_free_microshit (idle);
   array_free_microshit (prepare);
   array_free_microshit (check);
@@ -824,13 +876,8 @@ ev_loop_fork (EV_P)
 #endif
 
 #if EV_MULTIPLICITY
-struct ev_loop default_loop_struct;
-static struct ev_loop *default_loop;
-
 struct ev_loop *
 #else
-static int default_loop;
-
 int
 #endif
 ev_default_loop (int methods)
@@ -926,7 +973,7 @@ call_pending (EV_P)
         if (p->w)
           {
             p->w->pending = 0;
-            p->w->cb (EV_A_ p->w, p->events);
+            EV_CB_INVOKE (p->w, p->events);
           }
       }
 }
@@ -944,7 +991,11 @@ timers_reify (EV_P)
       if (w->repeat)
         {
           assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
-          ((WT)w)->at = mn_now + w->repeat;
+
+          ((WT)w)->at += w->repeat;
+          if (((WT)w)->at < mn_now)
+            ((WT)w)->at = mn_now;
+
           downheap ((WT *)timers, timercnt, 0);
         }
       else
@@ -954,10 +1005,11 @@ timers_reify (EV_P)
     }
 }
 
+#if EV_PERIODICS
 static void
 periodics_reify (EV_P)
 {
-  while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
+  while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
     {
       struct ev_periodic *w = periodics [0];
 
@@ -966,15 +1018,15 @@ periodics_reify (EV_P)
       /* first reschedule or stop timer */
       if (w->reschedule_cb)
         {
-          ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
+          ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
 
-          assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
+          assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
           downheap ((WT *)periodics, periodiccnt, 0);
         }
       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));
+          ((WT)w)->at += floor ((ev_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 > ev_rt_now));
           downheap ((WT *)periodics, periodiccnt, 0);
         }
       else
@@ -995,15 +1047,16 @@ periodics_reschedule (EV_P)
       struct ev_periodic *w = periodics [i];
 
       if (w->reschedule_cb)
-        ((WT)w)->at = w->reschedule_cb (w, rt_now);
+        ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
       else if (w->interval)
-        ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+        ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
     }
 
   /* now rebuild the heap */
   for (i = periodiccnt >> 1; i--; )
     downheap ((WT *)periodics, periodiccnt, i);
 }
+#endif
 
 inline int
 time_update_monotonic (EV_P)
@@ -1012,13 +1065,13 @@ time_update_monotonic (EV_P)
 
   if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
     {
-      rt_now = rtmn_diff + mn_now;
+      ev_rt_now = rtmn_diff + mn_now;
       return 0;
     }
   else
     {
       now_floor = mn_now;
-      rt_now = ev_time ();
+      ev_rt_now = ev_time ();
       return 1;
     }
 }
@@ -1037,17 +1090,19 @@ time_update (EV_P)
 
           for (i = 4; --i; ) /* loop a few times, before making important decisions */
             {
-              rtmn_diff = rt_now - mn_now;
+              rtmn_diff = ev_rt_now - mn_now;
 
               if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
                 return; /* all is well */
 
-              rt_now    = ev_time ();
+              ev_rt_now = ev_time ();
               mn_now    = get_clock ();
               now_floor = mn_now;
             }
 
+# if EV_PERIODICS
           periodics_reschedule (EV_A);
+# endif
           /* no timer adjustment, as the monotonic clock doesn't jump */
           /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
         }
@@ -1055,18 +1110,20 @@ time_update (EV_P)
   else
 #endif
     {
-      rt_now = ev_time ();
+      ev_rt_now = ev_time ();
 
-      if (expect_false (mn_now > rt_now || mn_now < 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
           periodics_reschedule (EV_A);
+#endif
 
           /* adjust timers. this is easy, as the offset is the same for all */
           for (i = 0; i < timercnt; ++i)
-            ((WT)timers [i])->at += rt_now - mn_now;
+            ((WT)timers [i])->at += ev_rt_now - mn_now;
         }
 
-      mn_now = rt_now;
+      mn_now = ev_rt_now;
     }
 }
 
@@ -1116,8 +1173,8 @@ ev_loop (EV_P_ int flags)
       else
 #endif
         {
-          rt_now = ev_time ();
-          mn_now = rt_now;
+          ev_rt_now = ev_time ();
+          mn_now    = ev_rt_now;
         }
 
       if (flags & EVLOOP_NONBLOCK || idlecnt)
@@ -1132,23 +1189,27 @@ ev_loop (EV_P_ int flags)
               if (block > to) block = to;
             }
 
+#if EV_PERIODICS
           if (periodiccnt)
             {
-              ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
+              ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
               if (block > to) block = to;
             }
+#endif
 
           if (block < 0.) block = 0.;
         }
 
       method_poll (EV_A_ block);
 
-      /* update rt_now, do magic */
+      /* update ev_rt_now, do magic */
       time_update (EV_A);
 
       /* queue pending timers and reschedule them */
       timers_reify (EV_A); /* relative timers called last */
+#if EV_PERIODICS
       periodics_reify (EV_A); /* absolute timers called first */
+#endif
 
       /* queue idle watchers unless io or timers are pending */
       if (idlecnt && !any_pending (EV_A))
@@ -1249,6 +1310,8 @@ ev_io_stop (EV_P_ struct ev_io *w)
   if (!ev_is_active (w))
     return;
 
+  assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
+
   wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
   ev_stop (EV_A_ (W)w);
 
@@ -1288,7 +1351,7 @@ ev_timer_stop (EV_P_ struct ev_timer *w)
       downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
     }
 
-  ((WT)w)->at = w->repeat;
+  ((WT)w)->at -= mn_now;
 
   ev_stop (EV_A_ (W)w);
 }
@@ -1299,10 +1362,7 @@ ev_timer_again (EV_P_ struct ev_timer *w)
   if (ev_is_active (w))
     {
       if (w->repeat)
-        {
-          ((WT)w)->at = mn_now + w->repeat;
-          downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
-        }
+        adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
       else
         ev_timer_stop (EV_A_ w);
     }
@@ -1310,6 +1370,7 @@ ev_timer_again (EV_P_ struct ev_timer *w)
     ev_timer_start (EV_A_ w);
 }
 
+#if EV_PERIODICS
 void
 ev_periodic_start (EV_P_ struct ev_periodic *w)
 {
@@ -1317,12 +1378,12 @@ ev_periodic_start (EV_P_ struct ev_periodic *w)
     return;
 
   if (w->reschedule_cb)
-    ((WT)w)->at = w->reschedule_cb (w, rt_now);
+    ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
   else if (w->interval)
     {
       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 */
-      ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+      ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
     }
 
   ev_start (EV_A_ (W)w, ++periodiccnt);
@@ -1354,9 +1415,11 @@ ev_periodic_stop (EV_P_ struct ev_periodic *w)
 void
 ev_periodic_again (EV_P_ struct ev_periodic *w)
 {
+  /* TODO: use adjustheap and recalculation */
   ev_periodic_stop (EV_A_ w);
   ev_periodic_start (EV_A_ w);
 }
+#endif
 
 void
 ev_idle_start (EV_P_ struct ev_idle *w)
@@ -1373,7 +1436,7 @@ void
 ev_idle_stop (EV_P_ struct ev_idle *w)
 {
   ev_clear_pending (EV_A_ (W)w);
-  if (ev_is_active (w))
+  if (!ev_is_active (w))
     return;
 
   idles [((W)w)->active - 1] = idles [--idlecnt];
@@ -1395,7 +1458,7 @@ void
 ev_prepare_stop (EV_P_ struct ev_prepare *w)
 {
   ev_clear_pending (EV_A_ (W)w);
-  if (ev_is_active (w))
+  if (!ev_is_active (w))
     return;
 
   prepares [((W)w)->active - 1] = prepares [--preparecnt];
@@ -1417,7 +1480,7 @@ void
 ev_check_stop (EV_P_ struct ev_check *w)
 {
   ev_clear_pending (EV_A_ (W)w);
-  if (ev_is_active (w))
+  if (!ev_is_active (w))
     return;
 
   checks [((W)w)->active - 1] = checks [--checkcnt];
@@ -1542,14 +1605,14 @@ ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, vo
       once->cb  = cb;
       once->arg = arg;
 
-      ev_watcher_init (&once->io, once_cb_io);
+      ev_init (&once->io, once_cb_io);
       if (fd >= 0)
         {
           ev_io_set (&once->io, fd, events);
           ev_io_start (EV_A_ &once->io);
         }
 
-      ev_watcher_init (&once->to, once_cb_to);
+      ev_init (&once->to, once_cb_to);
       if (timeout >= 0.)
         {
           ev_timer_set (&once->to, timeout, 0.);
@@ -1558,3 +1621,7 @@ ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, vo
     }
 }
 
+#ifdef __cplusplus
+}
+#endif
+