Initial commit of sync engine code to browser/sync....

chrome/browser/sync/notifier/gaia_auth/sigslotrepeater.h

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_SYNC_NOTIFIER_GAIA_AUTH_INET_ATON_H_SIGSLOTREPEATER_H_
+#define CHROME_BROWSER_SYNC_NOTIFIER_GAIA_AUTH_INET_ATON_H_SIGSLOTREPEATER_H_
+
+// Repeaters are both signals and slots, which are designed as intermediate
+// pass-throughs for signals and slots which don't know about each other (for
+// modularity or encapsulation).  This eliminates the need to declare a signal
+// handler whose sole purpose is to fire another signal.  The repeater connects
+// to the originating signal using the 'repeat' method.  When the repeated
+// signal fires, the repeater will also fire.
+
+#include "talk/base/sigslot.h"
+
+namespace sigslot {
+
+  template<class mt_policy = SIGSLOT_DEFAULT_MT_POLICY>
+  class repeater0 : public signal0<mt_policy>,
+                    public has_slots<mt_policy> {
+  public:
+    typedef signal0<mt_policy> base_type;
+    typedef repeater0<mt_policy> this_type;
+
+    repeater0() { }
+    explicit repeater0(const this_type& s) : base_type(s) { }
+
+    void reemit() { signal0<mt_policy>::emit(); }
+    void repeat(base_type &s) { s.connect(this, &this_type::reemit); }
+  };
+
+  template<class arg1_type, class mt_policy = SIGSLOT_DEFAULT_MT_POLICY>
+  class repeater1 : public signal1<arg1_type, mt_policy>,
+                    public has_slots<mt_policy>
+  {
+  public:
+    typedef signal1<arg1_type, mt_policy> base_type;
+    typedef repeater1<arg1_type, mt_policy> this_type;
+
+    repeater1() { }
+    repeater1(const this_type& s) : base_type(s) { }
+
+    void reemit(arg1_type a1) { signal1<arg1_type, mt_policy>::emit(a1); }
+    void repeat(base_type& s) { s.connect(this, &this_type::reemit); }
+  };
+
+  template<class arg1_type, class arg2_type,
+           class mt_policy = SIGSLOT_DEFAULT_MT_POLICY>
+  class repeater2 : public signal2<arg1_type, arg2_type, mt_policy>,
+                    public has_slots<mt_policy>
+  {
+  public:
+    typedef signal2<arg1_type, arg2_type, mt_policy> base_type;
+    typedef repeater2<arg1_type, arg2_type, mt_policy> this_type;
+
+    repeater2() { }
+    repeater2(const this_type& s) : base_type(s) { }
+
+    void reemit(arg1_type a1, arg2_type a2) {
+      signal2<arg1_type, arg2_type, mt_policy>::emit(a1, a2);
+    }
+    void repeat(base_type& s) { s.connect(this, &this_type::reemit); }
+  };
+
+  template<class arg1_type, class arg2_type, class arg3_type,
+           class mt_policy = SIGSLOT_DEFAULT_MT_POLICY>
+  class repeater3 : public signal3<arg1_type, arg2_type, arg3_type, mt_policy>,
+                    public has_slots<mt_policy>
+  {
+  public:
+    typedef signal3<arg1_type, arg2_type, arg3_type, mt_policy> base_type;
+    typedef repeater3<arg1_type, arg2_type, arg3_type, mt_policy> this_type;
+
+    repeater3() { }
+    repeater3(const this_type& s) : base_type(s) { }
+
+    void reemit(arg1_type a1, arg2_type a2, arg3_type a3) {
+      signal3<arg1_type, arg2_type, arg3_type, mt_policy>::emit(a1, a2, a3);
+    }
+    void repeat(base_type& s) { s.connect(this, &this_type::reemit); }
+  };
+
+}  // namespace sigslot
+
+#endif  // CHROME_BROWSER_SYNC_NOTIFIER_GAIA_AUTH_INET_ATON_H_SIGSLOTREPEATER_H_