Imported existing code

libraries/include/boost/coroutine/detail/signal.hpp

@@ -0,0 +1,67 @@
+//  Copyright (c) 2006, Giovanni P. Deretta
+//
+//  This code may be used under either of the following two licences:
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy 
+//  of this software and associated documentation files (the "Software"), to deal 
+//  in the Software without restriction, including without limitation the rights 
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+//  copies of the Software, and to permit persons to whom the Software is 
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in 
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+//  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+//  THE SOFTWARE. OF SUCH DAMAGE.
+//
+//  Or:
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_COROUTINE_DETAIL_SIGNAL_HPP_20060728
+#define BOOST_COROUTINE_DETAIL_SIGNAL_HPP_20060728
+#include <boost/coroutine/detail/future_impl.hpp>
+namespace boost { namespace coroutines { namespace detail {
+  /*
+   * Private interface for coroutine signaling/waiting.
+   * These class is friend of future_impl and
+   * its static members are invoked by asynchronous callback functions.
+   */
+  struct wait_gateway {
+    template<typename Future>
+    static void wait(Future& f, int n) {
+      f.wait(n);
+    }
+
+    template<typename Future>
+    static 
+    bool waited(const Future& f) {
+      return f.waited();
+    }
+
+    template<typename Future>
+    static 
+    void mark_wait(Future& f, bool how) {
+      f.mark_wait(how);
+    }
+
+    template<typename Future>
+    static
+    BOOST_DEDUCED_TYPENAME 
+    Future::impl_pointer
+    get_impl(Future& f) {
+      return f.m_ptr;
+    }
+  };
+
+
+} } }
+#endif