enabled support for BOOST_ASIO_NO_TS_EXECUTORS

Closes #214.

include/boost/cobalt/detail/exception.hpp

@@ -23,6 +23,8 @@ BOOST_COBALT_DECL std::exception_ptr wait_not_ready();
 BOOST_COBALT_DECL std::exception_ptr already_awaited();
 BOOST_COBALT_DECL std::exception_ptr allocation_failed();
 
+BOOST_COBALT_DECL BOOST_NORETURN void throw_bad_executor(const boost::source_location & loc = BOOST_CURRENT_LOCATION);
+
 template<typename >
 std::exception_ptr wait_not_ready() { return boost::cobalt::detail::wait_not_ready();}
 

include/boost/cobalt/detail/task.hpp

@@ -312,7 +312,7 @@ struct task_promise
   const executor_type & get_executor() const
   {
       if (!exec)
-          throw_exception(asio::bad_executor());
+          detail::throw_bad_executor();
       BOOST_ASSERT(exec_);
       return *exec_;
   }

include/boost/cobalt/thread.hpp

@@ -9,6 +9,7 @@
 #define BOOST_COBALT_THREAD_HPP
 
 #include <boost/cobalt/detail/thread.hpp>
+#include <boost/cobalt/detail/exception.hpp>
 #include <boost/cobalt/detail/await_result_helper.hpp>
 
 
@@ -56,7 +57,7 @@ struct thread
   {
     auto st = state_;
     if (!st || st->done)
-      boost::throw_exception(asio::execution::bad_executor(), loc);
+      cobalt::detail::throw_bad_executor(loc);
 
     return st ->ctx.get_executor();
   }

src/detail/exception.cpp

@@ -8,6 +8,8 @@
 #include <boost/cobalt/detail/exception.hpp>
 #include <boost/cobalt/error.hpp>
 
+#include <boost/asio/executor.hpp>
+
 namespace boost::cobalt::detail
 {
 
@@ -62,5 +64,14 @@ std::exception_ptr allocation_failed()
   return ep;
 }
 
+void throw_bad_executor(const boost::source_location & loc)
+{
+#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
+  boost::throw_exception(boost::asio::execution::bad_executor(), loc);
+#else
+  boost::throw_exception(boost::asio::bad_executor(), loc);
+#endif
+}
+
 
 }

src/this_thread.cpp

@@ -6,6 +6,7 @@
 //
 
 #include <boost/cobalt/this_thread.hpp>
+#include <boost/cobalt/detail/exception.hpp>
 #include <boost/asio/any_io_executor.hpp>
 
 #include <boost/asio/executor.hpp>
@@ -53,7 +54,8 @@ bool has_executor()
 executor & get_executor(const boost::source_location & loc)
 {
   if (!detail::executor)
-    throw_exception(asio::bad_executor(), loc);
+    cobalt::detail::throw_bad_executor(loc);
+
   return *detail::executor;
 }
 
@@ -67,15 +69,16 @@ struct this_thread_service : asio::detail::execution_context_service_base<this_t
 
   void shutdown() override
   {
-    if (detail::executor && (&detail::executor->context() == &this->context()))
+
+    if (detail::executor && (&asio::query(*detail::executor, asio::execution::context) == &this->context()))
       detail::executor.reset();
   }
 };
 
 void set_executor(executor exec) noexcept
 {
   detail::executor = std::move(exec);
-  asio::use_service<this_thread_service>(detail::executor->context());
+  asio::use_service<this_thread_service>(asio::query(*detail::executor, asio::execution::context));
 }
 }
 
@@ -88,8 +91,7 @@ extract_executor(asio::any_io_executor exec)
 {
   auto t = exec.target<executor>();
   if (t == nullptr)
-    throw_exception(asio::bad_executor());
-
+    cobalt::detail::throw_bad_executor(loc);
   return *t;
 }
 #endif

test/promise.cpp

@@ -111,7 +111,7 @@ BOOST_AUTO_TEST_CASE(bad_executor_)
     auto t = test0();
     BOOST_FAIL("Should throw");
   }
-  catch(asio::bad_executor &) {}
+  catch(std::exception & e) {BOOST_CHECK_EQUAL(e.what(), std::string_view("bad executor"));}
 
 }
 

test/thread.cpp

@@ -27,7 +27,7 @@ BOOST_AUTO_TEST_CASE(run)
   auto t = thr();
 
   t.join();
-  BOOST_CHECK_THROW(t.get_executor(), boost::asio::execution::bad_executor);
+  try {t.get_executor();} catch(std::exception & e) {BOOST_CHECK_EQUAL(e.what(), std::string_view("bad executor")); }
 }
 
 
@@ -44,7 +44,7 @@ boost::cobalt::thread thr_stop()
   auto exc = co_await boost::asio::this_coro::executor;
 #endif
 
-  exc.context().stop();
+  boost::asio::query(exc, boost::asio::execution::context).stop();
   co_await tim.async_wait(boost::cobalt::use_op);
 }