*** empty log message ***

Changes

@@ -17,6 +17,8 @@ TODO: document requirements for function pointers and calling conventions.
 
 	- prefer noexcept over throw () with C++ 11.
         - update ecb.h due to incompatibilities with c11.
+        - fix a potentgial aliasing issue when reading and writing
+          watcher callbacks.
 
 4.19 Thu Sep 25 08:18:25 CEST 2014
 	- ev.h wasn't valid C++ anymore, which tripped compilers other than

ev.h

@@ -1,7 +1,7 @@
 /*
  * libev native API header
  *
- * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
+ * Copyright (c) 2007,2008,2009,2010,2011,2012,2015 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modifica-
@@ -152,6 +152,8 @@ EV_CPP(extern "C" {)
 
 typedef double ev_tstamp;
 
+#include <string.h> /* for memmove */
+
 #ifndef EV_ATOMIC_T
 # include <signal.h>
 # define EV_ATOMIC_T sig_atomic_t volatile
@@ -719,7 +721,8 @@ EV_API_DECL void ev_resume  (EV_P) EV_THROW;
 #define ev_is_pending(ev)                    (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
 #define ev_is_active(ev)                     (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
 
-#define ev_cb(ev)                            (ev)->cb /* rw */
+#define ev_cb_(ev)                           (ev)->cb /* rw */
+#define ev_cb(ev)                            (memmove (&ev_cb_ (ev), &((ev_watcher *)(ev))->cb, sizeof (ev_cb_ (ev))), (ev)->cb)
 
 #if EV_MINPRI == EV_MAXPRI
 # define ev_priority(ev)                     ((ev), EV_MINPRI)
@@ -732,7 +735,7 @@ EV_API_DECL void ev_resume  (EV_P) EV_THROW;
 #define ev_periodic_at(ev)                   (+((ev_watcher_time *)(ev))->at)
 
 #ifndef ev_set_cb
-# define ev_set_cb(ev,cb_)                   ev_cb (ev) = (cb_)
+# define ev_set_cb(ev,cb_)                   (ev_cb_ (ev) = (cb_), memmove (&((ev_watcher *)(ev))->cb, &ev_cb_ (ev), sizeof (ev_cb_ (ev))))
 #endif
 
 /* stopping (enabling, adding) a watcher does nothing if it is already running */

ev.pod

@@ -3902,7 +3902,7 @@ files, F<my_ev.h> and F<my_ev.c> that include the respective libev files:
 
    // my_ev.h
    #define EV_CB_DECLARE(type)   struct my_coro *cb;
-   #define EV_CB_INVOKE(watcher) switch_to ((watcher)->cb);
+   #define EV_CB_INVOKE(watcher) switch_to ((watcher)->cb)
    #include "../libev/ev.h"
 
    // my_ev.c