pass large parameters by const ref, not value

Coverity 136394 136397 136409 136526 136529 136533 175302

7 files changed, 14 insertions, 14 deletions

diff --git a/contrib/epee/include/net/abstract_tcp_server2.h b/contrib/epee/include/net/abstract_tcp_server2.h
index c0401c8b0..ccde928ba 100644
--- a/contrib/epee/include/net/abstract_tcp_server2.h
+++ b/contrib/epee/include/net/abstract_tcp_server2.h
@@ -207,7 +207,7 @@ namespace net_utils
 
     bool connect(const std::string& adr, const std::string& port, uint32_t conn_timeot, t_connection_context& cn, const std::string& bind_ip = "0.0.0.0");
     template<class t_callback>
-    bool connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeot, t_callback cb, const std::string& bind_ip = "0.0.0.0");
+    bool connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeot, const t_callback &cb, const std::string& bind_ip = "0.0.0.0");
 
     typename t_protocol_handler::config_type& get_config_object(){return m_config;}
 
diff --git a/contrib/epee/include/net/abstract_tcp_server2.inl b/contrib/epee/include/net/abstract_tcp_server2.inl
index 870f6c2b2..e5c0804f8 100644
--- a/contrib/epee/include/net/abstract_tcp_server2.inl
+++ b/contrib/epee/include/net/abstract_tcp_server2.inl
@@ -1055,7 +1055,7 @@ POP_WARNINGS
   }
   //---------------------------------------------------------------------------------
   template<class t_protocol_handler> template<class t_callback>
-  bool boosted_tcp_server<t_protocol_handler>::connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeout, t_callback cb, const std::string& bind_ip)
+  bool boosted_tcp_server<t_protocol_handler>::connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeout, const t_callback &cb, const std::string& bind_ip)
   {
     TRY_ENTRY();    
     connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_config, m_sock_count, m_sock_number, m_pfilter, m_connection_type) );
diff --git a/contrib/epee/include/net/levin_protocol_handler_async.h b/contrib/epee/include/net/levin_protocol_handler_async.h
index ee64da5d8..9181076d7 100644
--- a/contrib/epee/include/net/levin_protocol_handler_async.h
+++ b/contrib/epee/include/net/levin_protocol_handler_async.h
@@ -84,16 +84,16 @@ public:
 
   int invoke(int command, const std::string& in_buff, std::string& buff_out, boost::uuids::uuid connection_id);
   template<class callback_t>
-  int invoke_async(int command, const std::string& in_buff, boost::uuids::uuid connection_id, callback_t cb, size_t timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED);
+  int invoke_async(int command, const std::string& in_buff, boost::uuids::uuid connection_id, const callback_t &cb, size_t timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED);
 
   int notify(int command, const std::string& in_buff, boost::uuids::uuid connection_id);
   bool close(boost::uuids::uuid connection_id);
   bool update_connection_context(const t_connection_context& contxt);
   bool request_callback(boost::uuids::uuid connection_id);
   template<class callback_t>
-  bool foreach_connection(callback_t cb);
+  bool foreach_connection(const callback_t &cb);
   template<class callback_t>
-  bool for_connection(const boost::uuids::uuid &connection_id, callback_t cb);
+  bool for_connection(const boost::uuids::uuid &connection_id, const callback_t &cb);
   size_t get_connections_count();
   void set_handler(levin_commands_handler<t_connection_context>* handler, void (*destroy)(levin_commands_handler<t_connection_context>*) = NULL);
 
@@ -245,7 +245,7 @@ public:
   std::list<boost::shared_ptr<invoke_response_handler_base> > m_invoke_response_handlers;
   
   template<class callback_t>
-  bool add_invoke_response_handler(callback_t cb, uint64_t timeout,  async_protocol_handler& con, int command)
+  bool add_invoke_response_handler(const callback_t &cb, uint64_t timeout,  async_protocol_handler& con, int command)
   {
     CRITICAL_REGION_LOCAL(m_invoke_response_handlers_lock);
     boost::shared_ptr<invoke_response_handler_base> handler(boost::make_shared<anvoke_handler<callback_t>>(cb, timeout, con, command));
@@ -529,7 +529,7 @@ public:
   }
 
   template<class callback_t>
-  bool async_invoke(int command, const std::string& in_buff, callback_t cb, size_t timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED)
+  bool async_invoke(int command, const std::string& in_buff, const callback_t &cb, size_t timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED)
   {
     misc_utils::auto_scope_leave_caller scope_exit_handler = misc_utils::create_scope_leave_handler(
       boost::bind(&async_protocol_handler::finish_outer_call, this));
@@ -805,7 +805,7 @@ int async_protocol_handler_config<t_connection_context>::invoke(int command, con
 }
 //------------------------------------------------------------------------------------------
 template<class t_connection_context> template<class callback_t>
-int async_protocol_handler_config<t_connection_context>::invoke_async(int command, const std::string& in_buff, boost::uuids::uuid connection_id, callback_t cb, size_t timeout)
+int async_protocol_handler_config<t_connection_context>::invoke_async(int command, const std::string& in_buff, boost::uuids::uuid connection_id, const callback_t &cb, size_t timeout)
 {
   async_protocol_handler<t_connection_context>* aph;
   int r = find_and_lock_connection(connection_id, aph);
@@ -813,7 +813,7 @@ int async_protocol_handler_config<t_connection_context>::invoke_async(int comman
 }
 //------------------------------------------------------------------------------------------
 template<class t_connection_context> template<class callback_t>
-bool async_protocol_handler_config<t_connection_context>::foreach_connection(callback_t cb)
+bool async_protocol_handler_config<t_connection_context>::foreach_connection(const callback_t &cb)
 {
   CRITICAL_REGION_LOCAL(m_connects_lock);
   for(auto& c: m_connects)
@@ -826,7 +826,7 @@ bool async_protocol_handler_config<t_connection_context>::foreach_connection(cal
 }
 //------------------------------------------------------------------------------------------
 template<class t_connection_context> template<class callback_t>
-bool async_protocol_handler_config<t_connection_context>::for_connection(const boost::uuids::uuid &connection_id, callback_t cb)
+bool async_protocol_handler_config<t_connection_context>::for_connection(const boost::uuids::uuid &connection_id, const callback_t &cb)
 {
   CRITICAL_REGION_LOCAL(m_connects_lock);
   async_protocol_handler<t_connection_context>* aph = find_connection(connection_id);
diff --git a/contrib/epee/include/storages/levin_abstract_invoke2.h b/contrib/epee/include/storages/levin_abstract_invoke2.h
index b4f7abca8..d77e7a1f8 100644
--- a/contrib/epee/include/storages/levin_abstract_invoke2.h
+++ b/contrib/epee/include/storages/levin_abstract_invoke2.h
@@ -108,7 +108,7 @@ namespace epee
     }
 
     template<class t_result, class t_arg, class callback_t, class t_transport>
-    bool async_invoke_remote_command2(boost::uuids::uuid conn_id, int command, const t_arg& out_struct, t_transport& transport, callback_t cb, size_t inv_timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED)
+    bool async_invoke_remote_command2(boost::uuids::uuid conn_id, int command, const t_arg& out_struct, t_transport& transport, const callback_t &cb, size_t inv_timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED)
     {
       typename serialization::portable_storage stg;
       const_cast<t_arg&>(out_struct).store(stg);//TODO: add true const support to searilzation
diff --git a/src/p2p/net_node.h b/src/p2p/net_node.h
index 20520f83c..4f2d2b4cf 100644
--- a/src/p2p/net_node.h
+++ b/src/p2p/net_node.h
@@ -214,7 +214,7 @@ namespace nodetool
     void add_upnp_port_mapping(uint32_t port);
     void delete_upnp_port_mapping(uint32_t port);
     template<class t_callback>
-    bool try_ping(basic_node_data& node_data, p2p_connection_context& context, t_callback cb);
+    bool try_ping(basic_node_data& node_data, p2p_connection_context& context, const t_callback &cb);
     bool try_get_support_flags(const p2p_connection_context& context, std::function<void(p2p_connection_context&, const uint32_t&)> f);
     bool make_expected_connections_count(PeerType peer_type, size_t expected_connections);
     void cache_connect_fail_info(const epee::net_utils::network_address& addr);
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index 152dba942..6e6e12009 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -1477,7 +1477,7 @@ namespace nodetool
   }
   //-----------------------------------------------------------------------------------
   template<class t_payload_net_handler> template<class t_callback>
-  bool node_server<t_payload_net_handler>::try_ping(basic_node_data& node_data, p2p_connection_context& context, t_callback cb)
+  bool node_server<t_payload_net_handler>::try_ping(basic_node_data& node_data, p2p_connection_context& context, const t_callback &cb)
   {
     if(!node_data.my_port)
       return false;
diff --git a/tests/core_tests/block_validation.cpp b/tests/core_tests/block_validation.cpp
index b9818d2c5..598cd4098 100644
--- a/tests/core_tests/block_validation.cpp
+++ b/tests/core_tests/block_validation.cpp
@@ -38,7 +38,7 @@ namespace
 {
   bool lift_up_difficulty(std::vector<test_event_entry>& events, std::vector<uint64_t>& timestamps,
                           std::vector<difficulty_type>& cummulative_difficulties, test_generator& generator,
-                          size_t new_block_count, const block blk_last, const account_base& miner_account)
+                          size_t new_block_count, const block &blk_last, const account_base& miner_account)
   {
     difficulty_type commulative_diffic = cummulative_difficulties.empty() ? 0 : cummulative_difficulties.back();
     block blk_prev = blk_last;