Add PARALLEL macro at chaser.hpp.

Author: evoskuil

include/bitcoin/node/chasers/chaser.hpp

@@ -156,6 +156,9 @@ class BCN_API chaser
 #define SUBSCRIBE_EVENTS(method, ...) \
     subscribe_events(BIND(method, __VA_ARGS__))
 
+#define PARALLEL(method, ...) \
+    boost::asio::post(threadpool_.service(), BIND(method, __VA_ARGS__));
+
 } // namespace node
 } // namespace libbitcoin