* implemented QOS method for channels

include/cppamqp/channel.h

@@ -46,6 +46,7 @@ namespace cppamqp
                void                bind_queue      (const std::string& queue, const std::string& exchange, const std::string& routing_key);
                void                publish         (const std::string& exchange, const std::string& routing_key, const publish_flags& flags, const std::string& message, const publish_options* options = nullptr);
                std::string         consume         (const std::string& queue, const std::string& consumer_tag, const consume_flags& flags);
+               void                qos             (uint32_t prefetch_size, uint16_t prefetch_count, bool global);
                void                close           (int status = AMQP_REPLY_SUCCESS);
     };
 

src/cppamqp/channel.cpp

@@ -113,6 +113,22 @@ std::string channel::consume(const std::string& queue, const std::string& consum
     return __impl::from_bytes(ret->consumer_tag);
 }
 
+void channel::qos(uint32_t prefetch_size, uint16_t prefetch_count, bool global)
+{
+    auto ret = amqp_basic_qos(
+        connection().handle(),
+        handle(),
+        prefetch_size,
+        prefetch_count,
+        global);
+    __impl::check_and_raise(
+        amqp_get_rpc_reply(connection().handle()),
+        static_cast<std::ostringstream&>(std::ostringstream() << "unable to set QOS values").str(),
+        false);
+    if (!ret)
+        throw exception("unable to set QOS values");
+}
+
 void channel::close(int status)
 {
     if (!_internal)