WaitFor.c Implement the intended NX_WAKEUP functionality

nx-X11/programs/Xserver/hw/nxagent/Imakefile

@@ -202,8 +202,8 @@ INCLUDES = \
 # NXAGENT_ONSTART                  communicate about startup phase to the original nxclient by NoMachine via selections
 # NXAGENT_WAKEUP=<milliseconds>    Specifies a timeout that makes WaitForSomething() return earlier than normal which
 #                                  enables nxagent to close the splash window at the right time and/or improve connection
-#                                  handling for the xdmcp option. This value has no effect because the code uses
-#                                  NX_TRANS_WAKEUP in os/WaitFor.c instead.
+#                                  handling for the xdmcp option.
+#                                  This only has an effect if NX_TRANS_WAKEUP is also set for os/WaitFor.c
 # NXAGENT_ARTSD                    enable special handling of MCOPGLOBALS property used by artsd.
 # NXAGENT_RENDER_CLEANUP           cleanup padding bits/bytes of glyphs to possibly increase compression rate
 #

nx-X11/programs/Xserver/os/Imakefile

@@ -42,7 +42,7 @@ NX_DEFINES = -DNX_TRANS_SOCKET		\
              -DNX_TRANS_FOPEN		\
              -DNX_TRANS_SLEEP		\
              -DNX_TRANS_EXIT		\
-             -DNX_TRANS_WAKEUP=1000	\
+             -DNX_TRANS_WAKEUP		\
              -DNXAGENT_SERVER		\
              $(NULL)
 

nx-X11/programs/Xserver/os/WaitFor.c

@@ -237,13 +237,15 @@ WaitForSomething(int *pClientsReady)
 
         /*
          * If caller has marked the first element of pClientsReady[],
-         * bail out of select after a short (NX_TRANS_WAKEUP)
-         * timeout. We need this to let the NX agent remove the splash
-         * screen when the timeout is expired. A better option would
-         * be to use the existing screen-saver timeout but it can be
-         * modified by clients, so we would need a special
-         * handling. This hack is trivial and keeps WaitForSomething()
-         * backward compatible with the existing servers.
+         * bail out of select after the timeout given in the second
+         * element. We need this to let the NX agent remove the splash
+         * screen when the timeout is expired even if there's no
+         * client. Otherwise WaitForSomething would block. A better
+         * option would be to use the existing screen-saver timeout
+         * but it can be modified by clients, so we would need a
+         * special handling. This hack is trivial and keeps
+         * WaitForSomething() backward compatible with the existing
+         * servers.
          */
 
         if (pClientsReady[0] == -1)
@@ -257,7 +259,7 @@ WaitForSomething(int *pClientsReady)
 
             timeoutInMillis = GetTimeInMillis();
 
-            if (timeoutInMillis - startTimeInMillis >= NX_TRANS_WAKEUP)
+            if (timeoutInMillis - startTimeInMillis >= pClientsReady[1])
             {
                 #ifdef NX_TRANS_DEBUG
                 fprintf(stderr, "WaitForSomething: Returning 0 because of wakeup timeout.\n");
@@ -265,7 +267,7 @@ WaitForSomething(int *pClientsReady)
 		return 0;
             }
 
-            timeoutInMillis = NX_TRANS_WAKEUP - (timeoutInMillis - startTimeInMillis);
+            timeoutInMillis = pClientsReady[1] - (timeoutInMillis - startTimeInMillis);
 
             #ifdef NX_TRANS_DEBUG
             fprintf(stderr, "WaitForSomething: Milliseconds to next wakeup are %ld.\n",