Added another constructor to the linker that lets you link two connections

right away.

dlib/linker/linker_kernel_1.cpp

@@ -24,6 +24,22 @@ namespace dlib
     {
     }
 
+// ----------------------------------------------------------------------------------------
+
+    linker::
+    linker (
+        connection& a,
+        connection& b
+    ) :
+        running(false),
+        running_signaler(running_mutex),
+        A(0),
+        B(0),
+        service_connection_running_signaler(service_connection_running_mutex)
+    {
+        link(a,b);
+    }
+
 // ----------------------------------------------------------------------------------------
 
     linker::

dlib/linker/linker_kernel_1.h

@@ -70,10 +70,14 @@ namespace dlib
             typedef linker kernel_1a;
             typedef linker kernel_1a_c;
 
-
             linker(
             );
 
+            linker (
+                connection& a,
+                connection& b
+            );
+
             virtual ~linker(
             ); 
 

dlib/linker/linker_kernel_abstract.h

@@ -36,7 +36,6 @@ namespace dlib
 
         public:
 
-
             linker(
             );
             /*!
@@ -47,6 +46,21 @@ namespace dlib
                     - dlib::thread_error
             !*/
 
+            linker (
+                connection& a,
+                connection& b
+            );
+            /*!
+                ensures 
+                    - #*this is properly initialized
+                    - immediately invokes link(a,b); 
+                      (i.e. using this constructor is the same as creating a linker with
+                      the default constructor and then immediately invoking link() on it)
+                throws
+                    - std::bad_alloc
+                    - dlib::thread_error
+            !*/
+
             virtual ~linker(
             ); 
             /*!