immediate_executor is supported. (#2672)

include/boost/beast/http/impl/read.hpp

@@ -244,8 +244,13 @@ public:
                         __FILE__, __LINE__,
                         "http::async_read_some"));
 
-                    net::post(
-                        s_.get_executor(),
+
+                    const auto ex =
+                        asio::get_associated_immediate_executor(
+                            self, s_.get_executor());
+
+                    net::dispatch(
+                        ex,
                         beast::bind_front_handler(std::move(self), ec));
                 }
             }
@@ -285,7 +290,11 @@ public:
                         __FILE__, __LINE__,
                         "http::async_read"));
 
-                    net::post(s_.get_executor(), std::move(self));
+                    const auto ex =
+                        asio::get_associated_immediate_executor(
+                            self, s_.get_executor());
+
+                    net::dispatch(ex, std::move(self));
                 }
             }
             else

include/boost/beast/http/impl/write.hpp

@@ -18,7 +18,7 @@
 #include <boost/beast/core/stream_traits.hpp>
 #include <boost/beast/core/detail/is_invocable.hpp>
 #include <boost/asio/coroutine.hpp>
-#include <boost/asio/post.hpp>
+#include <boost/asio/dispatch.hpp>
 #include <boost/asio/write.hpp>
 #include <boost/optional.hpp>
 #include <boost/throw_exception.hpp>
@@ -102,8 +102,9 @@ public:
                     __FILE__, __LINE__,
                     "http::async_write_some"));
 
-                return net::post(
-                    s_.get_executor(),
+                auto ex = asio::get_associated_immediate_executor(*this, s_.get_executor());
+                return net::dispatch(
+                    ex,
                     beast::bind_front_handler(
                         std::move(*this), ec, 0));
             }
@@ -120,8 +121,9 @@ public:
             __FILE__, __LINE__,
             "http::async_write_some"));
 
-        return net::post(
-            s_.get_executor(),
+        const auto ex = this->get_immediate_executor();
+        return net::dispatch(
+            ex,
             beast::bind_front_handler(
                 std::move(*this), ec, 0));
     }
@@ -219,8 +221,9 @@ public:
                         __FILE__, __LINE__,
                         "http::async_write"));
 
-                    net::post(
-                        s_.get_executor(),
+                    const auto ex = this->get_immediate_executor();
+                    net::dispatch(
+                        ex,
                         std::move(*this));
                 }
                 goto upcall;