Start resolving build errors with newly-merged sched-props-dev branch.

Get fiber_manager out of the business of casting returned properties: that
introduces a circular dependency. Defer casting to fiber_properties subclass
to consumers in fiber.hpp and operations.hpp.

include/boost/fiber/algorithm.hpp

@@ -10,6 +10,7 @@
 
 #include <boost/fiber/properties.hpp>
 #include <boost/fiber/detail/config.hpp>
+#include <boost/fiber/fiber_context.hpp>
  
 #ifdef BOOST_HAS_ABI_HEADERS
 #  include BOOST_ABI_PREFIX
@@ -17,7 +18,6 @@
 
 namespace boost {
 namespace fibers {
-class fiber_context;
 
 struct BOOST_FIBERS_DECL sched_algorithm {
     virtual ~sched_algorithm() {}

include/boost/fiber/detail/waiting_queue.hpp

@@ -44,7 +44,7 @@ public:
     fiber_context * top() const noexcept {
         BOOST_ASSERT( ! empty() );
 
-        return static_cast<worker_fiber*>(head_); 
+        return head_; 
     }
 
     void move_to( sched_algorithm *);

include/boost/fiber/fiber.hpp

@@ -119,7 +119,7 @@ public:
     template <class PROPS>
     PROPS& properties()
     {
-        return detail::scheduler::instance()->properties<PROPS>(impl_.get());
+        return dynamic_cast<PROPS&>(*impl_->get_properties());
     }
 };
 

include/boost/fiber/fiber_manager.hpp

@@ -94,21 +94,6 @@ public:
 
     std::chrono::high_resolution_clock::duration wait_interval() noexcept;
 
-    // implementation for fiber::properties<PROPS>()
-    template < class PROPS >
-    PROPS& properties( fiber_context * f )
-    {
-        return dynamic_cast<sched_algorithm_with_properties<PROPS>&>(*get_sched_algo_())
-               .properties(f);
-    }
-
-    // implementation for this_fiber::properties<PROPS>()
-    template < class PROPS >
-    PROPS& properties()
-    {
-        return properties<PROPS>(active());
-    }
-
     void preserve_fpu( bool);
 };
 

include/boost/fiber/operations.hpp

@@ -52,7 +52,7 @@ void sleep_for( std::chrono::duration< Rep, Period > const& timeout_duration) {
 template < class PROPS >
 PROPS& properties()
 {
-    return fibers::detail::scheduler::instance()->active()->properties<PROPS>();
+    return dynamic_cast<PROPS&>(*fibers::detail::scheduler::instance()->active()->get_properties());
 }
 
 } // this_fiber