完善concept定义

librf/src/channel_v2.inl

 	{
 		if constexpr (USE_LINK_QUEUE)
 		{
-			return reinterpret_cast<state_read_t*>(_read_awakes.try_pop());
+			return _read_awakes.try_pop();
 		}
 		else
 		{
 			if (!_read_awakes.empty())
 			{
-				state_write_t* state = _read_awakes.front();
+				state_read_t* state = _read_awakes.front();
 				_read_awakes.pop_front();
 				return state;
 			}
 	{
 		if constexpr (USE_LINK_QUEUE)
 		{
-			return reinterpret_cast<state_write_t*>(_write_awakes.try_pop());
+			return _write_awakes.try_pop();
 		}
 		else
 		{

librf/src/mutex_v2.inl

 					return false;
 
 				_state = new detail::state_mutex_t();
-				(void)_state->on_await_suspend(handler, parent->get_scheduler(), _root);
+				_state->on_await_suspend(handler, parent->get_scheduler(), _root);
 
 				_mutex->add_wait_list_lockless(_state.get());
 

librf/src/type_concept.inl

 	template<typename T>
 	concept _AwaitorT = requires(T&& v)
 	{
-		{ v.await_ready() } -> bool;
+		{ v.await_ready() } ->bool;
 		{ v.await_suspend(std::declval<std::experimental::coroutine_handle<promise_t<>>>()) };
 		{ v.await_resume() };
+		requires traits::is_valid_await_suspend_return_v<
+			decltype(v.await_suspend(std::declval<std::experimental::coroutine_handle<promise_t<>>>()))
+		>;
 	};
 
 	template<typename T> 

vs_proj/librf.cpp

 	//test_ring_queue<resumef::ring_queue_spinlock<int, false, uint32_t>>();
 	//test_ring_queue<resumef::ring_queue_lockfree<int, uint64_t>>();
 
-	//resumable_main_event_v2();
-	//resumable_main_event();
-	//resumable_main_event_timeout();
-	//resumable_main_sleep();
-	//resumable_main_resumable();
-	//return 0;
+	resumable_main_channel_mult_thread();
+	resumable_main_channel();
+	return 0;
 
 	//if (argc > 1)
 	//	resumable_main_benchmark_asio_client(atoi(argv[1]));

vs_proj/librf.vcxproj

   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
-    <PlatformToolset>ClangCL</PlatformToolset>
+    <PlatformToolset>v142</PlatformToolset>
     <UseDebugLibraries>true</UseDebugLibraries>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>ClangCL</PlatformToolset>
+    <PlatformToolset>v142</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>NotSet</CharacterSet>
   </PropertyGroup>