Added connection::disable_nagle()

dlib/sockets/sockets_kernel_1.cpp

@@ -266,6 +266,20 @@ namespace dlib
         delete &connection_socket;
     }
 
+// ----------------------------------------------------------------------------------------
+
+    int connection::
+    disable_nagle()
+    {
+        int flag = 1;
+        int status = setsockopt( connection_socket, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(flag) );
+
+        if (ret == SOCKET_ERROR) 
+            return OTHER_ERROR;
+        else
+            return 0;
+    }
+
 // ----------------------------------------------------------------------------------------
 
     long connection::

dlib/sockets/sockets_kernel_1.h

@@ -141,6 +141,9 @@ namespace dlib
         // as the SOCKET win the windows API.
         typedef unsigned_type<void*>::type socket_descriptor_type;
 
+        int disable_nagle(
+        );
+
         socket_descriptor_type get_socket_descriptor (
         ) const;
 

dlib/sockets/sockets_kernel_2.cpp

@@ -11,6 +11,7 @@
 #include "sockets_kernel_2.h"
 #include <fcntl.h>
 #include "../set.h"
+#include <netinet/tcp.h>
 
 
 
@@ -309,6 +310,20 @@ namespace dlib
         sdr(0)
     {}
 
+// ----------------------------------------------------------------------------------------
+
+    int connection::
+    disable_nagle()
+    {
+        int flag = 1;
+        if(setsockopt( connection_socket, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(flag) ))
+        {
+            return OTHER_ERROR;
+        }
+
+        return 0;
+    }
+
 // ----------------------------------------------------------------------------------------
 
     long connection::

dlib/sockets/sockets_kernel_2.h

@@ -183,6 +183,9 @@ namespace dlib
             return temp;
         }
 
+        int disable_nagle(
+        );
+
         typedef int socket_descriptor_type;
 
         socket_descriptor_type get_socket_descriptor (

dlib/sockets/sockets_kernel_abstract.h

@@ -362,6 +362,19 @@ namespace dlib
                 - returns OTHER_ERROR if there was an error 
         !*/
 
+        int disable_nagle(
+        );
+        /*!
+            ensures
+                - Sets the TCP_NODELAY socket option to disable Nagle's algorithm.
+                  This can sometimes reduce transmission latency, however, in almost
+                  all normal cases you don't want to mess with this as the default
+                  setting is usually appropriate.  
+
+                - returns 0 upon success
+                - returns OTHER_ERROR if there was an error 
+        !*/
+
         typedef platform_specific_type socket_descriptor_type;
         socket_descriptor_type get_socket_descriptor (
         ) const;