fix json rpc server memory leak

include/fc/asio.hpp

@@ -2,8 +2,7 @@
  *  @file fc/cmt/asio.hpp
  *  @brief defines wrappers for boost::asio functions
  */
-#ifndef _FC_ASIO_HPP_
-#define _FC_ASIO_HPP_
+#pragma once
 #include <boost/asio.hpp>
 #include <boost/bind.hpp>
 #include <fc/future.hpp>
@@ -262,4 +261,3 @@ namespace asio {
 
 } } // namespace fc::asio
 
-#endif // _BOOST_CMT_ASIO_HPP_

include/fc/endpoint.hpp

@@ -15,7 +15,7 @@ namespace fc {
 
         uint32_t ip()const { return _ip; }
 
-d
+
       private:
         uint32_t _ip;
     };

include/fc/tcp_socket.hpp

@@ -1,5 +1,4 @@
-#ifndef _FC_TCP_SOCKET_HPP_
-#define _FC_TCP_SOCKET_HPP_
+#pragma once
 #include <fc/utility.hpp>
 #include <fc/fwd.hpp>
 #include <fc/iostream.hpp>
@@ -55,4 +54,3 @@ namespace fc {
 
 } // namesapce fc
 
-#endif // _FC_TCP_SOCKET_HPP_

src/json_rpc_stream_connection.cpp

@@ -22,9 +22,12 @@ namespace fc { namespace json {
       
       ~impl() {
         try {
+         // slog( "..." );
             self.cancel_pending_requests();
             _read_loop_complete.cancel();
+        //  slog( "wait..." );
             _read_loop_complete.wait();
+         // slog( "DONE ..." );
         } catch ( ... ) {}
       }
 
@@ -48,7 +51,9 @@ namespace fc { namespace json {
          } catch ( ... ) {
              wlog( "%s", fc::except_str().c_str() );
          }
+      //   slog( "cancel...");
          self.cancel_pending_requests();
+       //  slog( "close!" );
          if( !!on_close ) on_close();
       }
   };
@@ -56,9 +61,10 @@ namespace fc { namespace json {
   rpc_stream_connection::rpc_stream_connection( fc::istream& i, fc::ostream& o )
   :my( new impl(i,o,*this) ){
   }
-  rpc_stream_connection::rpc_stream_connection(){ slog( "%p...",this); }
-  rpc_stream_connection::rpc_stream_connection(const rpc_stream_connection& c):my(c.my){ slog( "%p",this); }
+  rpc_stream_connection::rpc_stream_connection(){  }
+  rpc_stream_connection::rpc_stream_connection(const rpc_stream_connection& c):my(c.my){ }
   rpc_stream_connection::~rpc_stream_connection(){ 
+    wlog( "%p", this );
    }
 
   // the life of the streams must exceed the life of all copies

src/json_rpc_tcp_server.cpp

@@ -31,7 +31,20 @@ namespace fc {
             slog( "new connection!" );
             my->on_con( *con ); 
             con->start();
+            rpc_tcp_connection* tcpc = con.get();
             my->cons.push_back(con);
+            con->on_close( [=]() {
+               for( int i = 0; i < my->cons.size(); ++i ) {
+                  if( my->cons[i].get() == tcpc ) {
+                    fc_swap( my->cons[i], my->cons.back() );
+                    auto tmp = my->cons.back();
+                    my->cons.pop_back();
+                    fc::async([tmp](){slog("free con");});
+                    // TODO: swap to end, pop back
+                    return;
+                  }
+               }
+            });
             con.reset(new rpc_tcp_connection() );
           }
         } catch ( ... ) {

src/tcp_socket.cpp

@@ -21,13 +21,13 @@ namespace fc {
     return my->_sock.is_open();
   }
 
-  tcp_socket::tcp_socket(){}
+  tcp_socket::tcp_socket(){};
 
-  tcp_socket::~tcp_socket(){  }
+  tcp_socket::~tcp_socket(){};
 
   void tcp_socket::flush() {}
   void tcp_socket::close() {
-    my->_sock.close();
+    if( is_open() ) my->_sock.close();
   }
 
   bool tcp_socket::eof()const {
@@ -63,14 +63,16 @@ namespace fc {
     boost::system::error_code ec;
     size_t w = my->_sock.read_some( boost::asio::buffer( buf, len ), ec );
     if( ec == boost::asio::error::would_block ) {
-      promise<size_t>::ptr p(new promise<size_t>("tcp_socket::write"));
+      promise<size_t>::ptr p(new promise<size_t>("tcp_socket::readsome"));
       my->_sock.async_read_some( boost::asio::buffer(buf, len),
                 [=]( const boost::system::error_code& ec, size_t bt ) {
+                     slog( "%d  ec: %s", bt, boost::system::system_error(ec).what() );
                     if( !ec ) p->set_value(bt);
                     else p->set_exception( fc::copy_exception( boost::system::system_error(ec) ) );
                 });
       return p->wait();
     } else if (ec ) {
+      slog( "throw!" );
       throw boost::system::system_error(ec);
     }
     return w;

vendor/CMakeLists.txt

@@ -1,3 +1,3 @@
 add_subdirectory( libssh2-1.4.2 )
 #add_subdirectory( zlib-1.2.7)
-add_subdirectory( sigar )
+#add_subdirectory( sigar )