From c80a9f5d507071c8ca31b8134f2a1662f306ef28 Mon Sep 17 00:00:00 2001
From: root <root>
Date: Wed, 3 Dec 2008 15:23:44 +0000
Subject: *** empty log message ***

---
 Changes |   3 ++
 ev++.h  | 124 +++++++++++++++++++++++++++-------------------------------------
 ev.pod  |  30 ++++++++++++++++
 3 files changed, 85 insertions(+), 72 deletions(-)

diff --git a/Changes b/Changes
index 7e7e8a3..bcb41f4 100644
--- a/Changes
+++ b/Changes
@@ -5,6 +5,9 @@ Revision history for libev, a high-performance and full-featured event loop.
         - assume negative return values != -1 signals success of port_getn
           (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
           (no known failure reports, but it doesn't hurt).
+        - EXPERIMENTAL: default the method to operator () in ev++.h,
+          to make it nicer to use functors (requested by Benedek László).
+        - fixed const object callbacks in ev++.h.
 
 3.49 Wed Nov 19 11:26:53 CET 2008
 	- ev_stat watchers will now use inotify as a mere hint on
diff --git a/ev++.h b/ev++.h
index b461f98..f1b4c6f 100644
--- a/ev++.h
+++ b/ev++.h
@@ -162,24 +162,14 @@ namespace ev {
     }
 
 #if EV_MULTIPLICITY
-    bool operator == (struct ev_loop *other) const throw ()
+    bool operator == (const EV_P) const throw ()
     {
-      return this->EV_AX == other;
+      return this->EV_AX == EV_A;
     }
 
-    bool operator != (struct ev_loop *other) const throw ()
+    bool operator != (const EV_P) const throw ()
     {
-      return ! (*this == other);
-    }
-
-    bool operator == (const struct ev_loop *other) const throw ()
-    {
-      return this->EV_AX == other;
-    }
-
-    bool operator != (const struct ev_loop *other) const throw ()
-    {
-      return (*this == other);
+      return (*this == EV_A);
     }
 
     operator struct ev_loop * () const throw ()
@@ -253,7 +243,7 @@ namespace ev {
     }
 
     // function callback
-    void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0) throw ()
+    void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void *arg = 0) throw ()
     {
       ev_once (EV_AX_ fd, events, timeout, cb, arg);
     }
@@ -265,28 +255,21 @@ namespace ev {
       once (fd, events, timeout, method_thunk<K, method>, object);
     }
 
-    template<class K, void (K::*method)(int)>
-    static void method_thunk (int revents, void* arg)
-    {
-      K *obj = static_cast<K *>(arg);
-      (obj->*method) (revents);
-    }
-
-    // const method callback
-    template<class K, void (K::*method)(int) const>
-    void once (int fd, int events, tstamp timeout, const K *object) throw ()
+    // default method == operator ()
+    template<class K>
+    void once (int fd, int events, tstamp timeout, K *object) throw ()
     {
-      once (fd, events, timeout, const_method_thunk<K, method>, object);
+      once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
     }
 
-    template<class K, void (K::*method)(int) const>
-    static void const_method_thunk (int revents, void* arg)
+    template<class K, void (K::*method)(int)>
+    static void method_thunk (int revents, void *arg)
     {
-      K *obj = static_cast<K *>(arg);
-      (obj->*method) (revents);
+      static_cast<K *>(arg)->*method
+        (revents);
     }
 
-    // simple method callback
+    // no-argument method callback
     template<class K, void (K::*method)()>
     void once (int fd, int events, tstamp timeout, K *object) throw ()
     {
@@ -294,10 +277,10 @@ namespace ev {
     }
 
     template<class K, void (K::*method)()>
-    static void method_noargs_thunk (int revents, void* arg)
+    static void method_noargs_thunk (int revents, void *arg)
     {
-      K *obj = static_cast<K *>(arg);
-      (obj->*method) ();
+      static_cast<K *>(arg)->*method
+        ();
     }
 
     // simpler function callback
@@ -308,9 +291,10 @@ namespace ev {
     }
 
     template<void (*cb)(int)>
-    static void simpler_func_thunk (int revents, void* arg)
+    static void simpler_func_thunk (int revents, void *arg)
     {
-      (*cb) (revents);
+      (*cb)
+        (revents);
     }
 
     // simplest function callback
@@ -321,9 +305,10 @@ namespace ev {
     }
 
     template<void (*cb)()>
-    static void simplest_func_thunk (int revents, void* arg)
+    static void simplest_func_thunk (int revents, void *arg)
     {
-      (*cb) ();
+      (*cb)
+        ();
     }
 
     void feed_fd_event (int fd, int revents) throw ()
@@ -423,7 +408,7 @@ namespace ev {
     #if EV_MULTIPLICITY
       EV_PX;
 
-      void set (EV_PX) throw ()
+      void set (EV_P) throw ()
       {
         this->EV_A = EV_A;
       }
@@ -437,54 +422,48 @@ namespace ev {
       ev_init (this, 0);
     }
 
-    void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
+    void set_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
     {
-      this->data = data;
+      this->data = (void *)data;
       ev_set_cb (static_cast<ev_watcher *>(this), cb);
     }
 
-    // method callback
-    template<class K, void (K::*method)(watcher &w, int)>
-    void set (K *object) throw ()
-    {
-      set_ (object, method_thunk<K, method>);
-    }
-
-    template<class K, void (K::*method)(watcher &w, int)>
-    static void method_thunk (EV_P_ ev_watcher *w, int revents)
+    // function callback
+    template<void (*function)(watcher &w, int)>
+    void set (void *data = 0) throw ()
     {
-      K *obj = static_cast<K *>(w->data);
-      (obj->*method) (*static_cast<watcher *>(w), revents);
+      set_ (data, function_thunk<function>);
     }
 
-    // const method callback
-    template<class K, void (K::*method)(watcher &w, int) const>
-    void set (const K *object) throw ()
+    template<void (*function)(watcher &w, int)>
+    static void function_thunk (EV_P_ ev_watcher *w, int revents)
     {
-      set_ (object, const_method_thunk<K, method>);
+      function
+        (*static_cast<watcher *>(w), revents);
     }
 
-    template<class K, void (K::*method)(watcher &w, int) const>
-    static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
+    // method callback
+    template<class K, void (K::*method)(watcher &w, int)>
+    void set (K *object) throw ()
     {
-      K *obj = static_cast<K *>(w->data);
-      (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
+      set_ (object, method_thunk<K, method>);
     }
 
-    // function callback
-    template<void (*function)(watcher &w, int)>
-    void set (void *data = 0) throw ()
+    // default method == operator ()
+    template<class K>
+    void set (K *object) throw ()
     {
-      set_ (data, function_thunk<function>);
+      set_ (object, method_thunk<K, &K::operator ()>);
     }
 
-    template<void (*function)(watcher &w, int)>
-    static void function_thunk (EV_P_ ev_watcher *w, int revents)
+    template<class K, void (K::*method)(watcher &w, int)>
+    static void method_thunk (EV_P_ ev_watcher *w, int revents)
     {
-      function (*static_cast<watcher *>(w), revents);
+      (static_cast<K *>(w->data)->*method)
+        (*static_cast<watcher *>(w), revents);
     }
 
-    // simple callback
+    // no-argument callback
     template<class K, void (K::*method)()>
     void set (K *object) throw ()
     {
@@ -494,14 +473,15 @@ namespace ev {
     template<class K, void (K::*method)()>
     static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
     {
-      K *obj = static_cast<K *>(w->data);
-      (obj->*method) ();
+      static_cast<K *>(w->data)->*method
+        ();
     }
 
     void operator ()(int events = EV_UNDEF)
     {
-      return ev_cb (static_cast<ev_watcher *>(this))
-        (static_cast<ev_watcher *>(this), events);
+      return
+        ev_cb (static_cast<ev_watcher *>(this))
+          (static_cast<ev_watcher *>(this), events);
     }
 
     bool is_active () const throw ()
diff --git a/ev.pod b/ev.pod
index 23942c0..a6f6854 100644
--- a/ev.pod
+++ b/ev.pod
@@ -2893,6 +2893,36 @@ Example: simple class declaration and watcher initialisation
    ev::io iow;
    iow.set <myclass, &myclass::io_cb> (&obj);
 
+=item w->set (object *)
+
+This is an B<experimental> feature that might go away in a future version.
+
+This is a variation of a method callback - leaving out the method to call
+will default the method to C<operator ()>, which makes it possible to use
+functor objects without having to manually specify the C<operator ()> all
+the time. Incidentally, you can then also leave out the template argument
+list.
+
+The C<operator ()> method prototype must be C<void operator ()(watcher &w,
+int revents)>.
+
+See the method-C<set> above for more details.
+
+Example: use a functor object as callback.
+
+   struct myfunctor
+   {
+     void operator() (ev::io &w, int revents)
+     {
+       ...
+     }
+   }
+    
+   myfunctor f;
+
+   ev::io w;
+   w.set (&f);
+
 =item w->set<function> (void *data = 0)
 
 Also sets a callback, but uses a static method or plain function as
-- 
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