*** empty log message ***

[software/libev.git] / ev++.h

diff --git a/ev++.h b/ev++.h
index 5133af07561e1f8369dec7ed377cbdca2268eca1..53367c10d396ef94fbeb87b89a99894f3243fec0 100644 (file)
--- a/ev++.h
+++ b/ev++.h
@@ -1,33 +1,145 @@
+/*
+ * libev simple C++ wrapper classes
+ *
+ * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modifica-
+ * tion, are permitted provided that the following conditions are met:
+ * 
+ *   1.  Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ * 
+ *   2.  Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
+ * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
+ * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
+ * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License ("GPL") version 2 or any later version,
+ * in which case the provisions of the GPL are applicable instead of
+ * the above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the BSD license, indicate your decision
+ * by deleting the provisions above and replace them with the notice
+ * 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.
+ */
+

 #ifndef EVPP_H__
 #define EVPP_H__
 
 #ifndef EVPP_H__
 #define EVPP_H__
 

-#include "ev.h"
+#ifdef EV_H
+# include EV_H
+#else
+# include "ev.h"
+#endif

 
 namespace ev {
 
 
 namespace ev {
 

-  template<class watcher>
-  class callback
+  template<class ev_watcher, class watcher>
+  struct base : ev_watcher

   {
   {

-    struct klass; // it is vital that this is never defined
+    #if EV_MULTIPLICITY
+      EV_P;

 
 

-    klass *o;
-    void (klass::*m)(watcher &, int);
+      void set (EV_P)
+      {
+        this->EV_A = EV_A;
+      }
+    #endif

 
 

-  public:
-    template<class O1, class O2>
-    explicit callback (O1 *object, void (O2::*method)(watcher &, int))
+    base ()
+    {
+      ev_init (this, 0);
+    }
+
+    void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
+    {
+      this->data = 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)
+    {
+      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)
+    {
+      K *obj = static_cast<K *>(w->data);
+      (obj->*method) (*static_cast<watcher *>(w), revents);
+    }
+
+    // const method callback
+    template<class K, void (K::*method)(watcher &w, int) const>
+    void set (const K *object)
+    {
+      set_ (object, const_method_thunk<K, method>);
+    }
+
+    template<class K, void (K::*method)(watcher &w, int) const>
+    static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
+    {
+      K *obj = static_cast<K *>(w->data);
+      (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
+    }
+
+    // function callback
+    template<void (*function)(watcher &w, int)>
+    void set (void *data = 0)
+    {
+      set_ (data, function_thunk<function>);
+    }
+
+    template<void (*function)(watcher &w, int)>
+    static void function_thunk (EV_P_ ev_watcher *w, int revents)
+    {
+      function (*static_cast<watcher *>(w), revents);
+    }
+
+    // simple callback
+    template<class K, void (K::*method)()>
+    void set (K *object)
+    {
+      set_ (object, method_noargs_thunk<K, method>);
+    }
+
+    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) ();
+    }
+
+    void operator ()(int events = EV_UNDEF)
+    {
+      return ev_cb (static_cast<ev_watcher *>(this))
+        (static_cast<ev_watcher *>(this), events);
+    }
+
+    bool is_active () const

     {
     {

-      o = reinterpret_cast<klass *>(object);
-      m = reinterpret_cast<void (klass::*)(watcher &, int)>(method);
+      return ev_is_active (static_cast<const ev_watcher *>(this));

     }
 
     }
 

-    // this works because a standards-compliant C++ compiler
-    // basically can't help it: it doesn't have the knowledge
-    // required to miscompile (klass is not defined anywhere
-    // and nothing is known about the constructor arguments) :)
-    void call (watcher *w, int revents)
+    bool is_pending () const

     {
     {

-      (o->*m) (*w, revents);
+      return ev_is_pending (static_cast<const ev_watcher *>(this));

     }
   };
 
     }
   };
 


@@ -57,49 +169,24 @@ namespace ev {
   }
 
   #if EV_MULTIPLICITY
   }
 
   #if EV_MULTIPLICITY

-
-    #define EV_CONSTRUCT(cppstem)                                                      \
-      EV_P;                                                                             \
-                                                                                        \
-      void set (EV_P)                                                                   \
+    #define EV_CONSTRUCT                                                                \
+      (EV_P = EV_DEFAULT)                                                               \

       {                                                                                 \
       {                                                                                 \

-        this->EV_A = EV_A;                                                              \
-      }                                                                                 \
-                                                                                        \
-      template<class O1, class O2>                                                      \
-      explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
-      : callback<cppstem> (object, method), EV_A (EV_A)
-
+        set (EV_A);                                                                     \
+      }

   #else
   #else

-
-    #define EV_CONSTRUCT(cppstem)                                                      \
-      template<class O1, class O2>                                                     \
-      explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int))                 \
-      : callback<cppstem> (object, method)
-
+    #define EV_CONSTRUCT                                                                \
+      ()                                                                                \
+      {                                                                                 \
+      }

   #endif
 
   /* using a template here would require quite a bit more lines,
    * so a macro solution was chosen */
   #define EV_BEGIN_WATCHER(cppstem,cstem)                                              \
                                                                                         \
   #endif
 
   /* using a template here would require quite a bit more lines,
    * so a macro solution was chosen */
   #define EV_BEGIN_WATCHER(cppstem,cstem)                                              \
                                                                                         \

-  struct cppstem : ev_ ## cstem, callback<cppstem>                                      \
+  struct cppstem : base<ev_ ## cstem, cppstem>                                          \

   {                                                                                     \
   {                                                                                     \

-    EV_CONSTRUCT (cppstem)                                                              \
-    {                                                                                   \
-      ev_init (static_cast<ev_ ## cstem *>(this), thunk);                               \
-    }                                                                                   \
-                                                                                        \
-    bool is_active () const                                                             \
-    {                                                                                   \
-      return ev_is_active (static_cast<const ev_ ## cstem *>(this));                    \
-    }                                                                                   \
-                                                                                        \
-    bool is_pending () const                                                            \
-    {                                                                                   \
-      return ev_is_pending (static_cast<const ev_ ## cstem *>(this));                   \
-    }                                                                                   \
-                                                                                        \

     void start ()                                                                       \
     {                                                                                   \
       ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \
     void start ()                                                                       \
     {                                                                                   \
       ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \


@@ -110,29 +197,22 @@ namespace ev {
       ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
     }                                                                                   \
                                                                                         \
       ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
     }                                                                                   \
                                                                                         \

-    void operator ()(int events = EV_UNDEF)                                             \
-    {                                                                                   \
-      return call (this, events);                                                       \
-    }                                                                                   \
+    cppstem EV_CONSTRUCT                                                                \

                                                                                         \
     ~cppstem ()                                                                         \
     {                                                                                   \
       stop ();                                                                          \
     }                                                                                   \
                                                                                         \
                                                                                         \
     ~cppstem ()                                                                         \
     {                                                                                   \
       stop ();                                                                          \
     }                                                                                   \
                                                                                         \

+    using base<ev_ ## cstem, cppstem>::set;                                             \
+                                                                                        \

   private:                                                                              \
                                                                                         \
     cppstem (const cppstem &o)                                                         \
   private:                                                                              \
                                                                                         \
     cppstem (const cppstem &o)                                                         \

-    : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0)                    \

     { /* disabled */ }                                                                 \
                                                                                         \
     void operator =(const cppstem &o) { /* disabled */ }                                \
                                                                                         \
     { /* disabled */ }                                                                 \
                                                                                         \
     void operator =(const cppstem &o) { /* disabled */ }                                \
                                                                                         \

-    static void thunk (EV_P_ struct ev_ ## cstem *w, int revents)                       \
-    {                                                                                   \
-      (*static_cast<cppstem *>(w))(revents);                                            \
-    }                                                                                   \
-                                                                                        \

   public:
 
   #define EV_END_WATCHER(cppstem,cstem)                                                        \
   public:
 
   #define EV_END_WATCHER(cppstem,cstem)                                                        \


@@ -250,6 +330,7 @@ namespace ev {
 
     void start (const char *path, ev_tstamp interval = 0.)
     {
 
     void start (const char *path, ev_tstamp interval = 0.)
     {

+      stop ();

       set (path, interval);
       start ();
     }
       set (path, interval);
       start ();
     }


@@ -275,17 +356,10 @@ namespace ev {
 
   #if EV_EMBED_ENABLE
   EV_BEGIN_WATCHER (embed, embed)
 
   #if EV_EMBED_ENABLE
   EV_BEGIN_WATCHER (embed, embed)

-    void set (struct ev_loop *loop)
-    {
-      int active = is_active ();
-      if (active) stop ();
-      ev_embed_set (static_cast<ev_embed *>(this), loop);
-      if (active) start ();
-    }
-

     void start (struct ev_loop *embedded_loop)
     {
     void start (struct ev_loop *embedded_loop)
     {

-      set (embedded_loop);
+      stop ();
+      ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);

       start ();
     }
 
       start ();
     }