hw/xwin: Make g_hwndClipboard static

Move winFixClipboardChain() into winclipboardthread.c
Add winCLipboardWindowDestroy() function to access it for WM_DESTROY

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Colin Harrison <colin.harrison@virgin.net>

hw/xwin/winclipboard.h

@@ -97,6 +97,9 @@ void
 
 void *winClipboardProc(char *szDisplay);
 
+void
+winClipboardWindowDestroy(void);
+
 /*
  * winclipboardwndproc.c
  */

hw/xwin/winclipboardinit.c

@@ -49,7 +49,6 @@ extern void winSetAuthorization(void);
  */
 
 extern Bool g_fClipboard;
-extern HWND g_hwndClipboard;
 extern Bool g_fClipboardStarted;
 
 /*
@@ -135,12 +134,7 @@ winClipboardShutdown(void)
   /* Close down clipboard resources */
   if (g_fClipboard && g_fClipboardStarted) {
     /* Synchronously destroy the clipboard window */
-    if (g_hwndClipboard != NULL) {
-      SendMessage(g_hwndClipboard, WM_DESTROY, 0, 0);
-      /* NOTE: g_hwndClipboard is set to NULL in winclipboardthread.c */
-    }
-    else
-      return;
+    winClipboardWindowDestroy();
 
     /* Wait for the clipboard thread to exit */
     pthread_join(g_ptClipboardProc, NULL);
@@ -150,11 +144,3 @@ winClipboardShutdown(void)
     winDebug("winClipboardShutdown - Clipboard thread has exited.\n");
   }
 }
-
-void
-winFixClipboardChain(void)
-{
-    if (g_fClipboard && g_hwndClipboard) {
-        PostMessage(g_hwndClipboard, WM_WM_REINIT, 0, 0);
-    }
-}

hw/xwin/winclipboardthread.c

@@ -57,12 +57,12 @@
 
 extern Bool g_fUnicodeClipboard;
 extern Bool g_fClipboard;
-extern HWND g_hwndClipboard;
 
 /*
  * Global variables
  */
 
+static HWND g_hwndClipboard = NULL;
 static jmp_buf g_jmpEntry;
 static XIOErrorHandler g_winClipboardOldIOErrorHandler;
 static pthread_t g_winClipboardProcThread;
@@ -240,7 +240,7 @@ winClipboardProc(char *szDisplay)
     /* Create Windows messaging window */
     hwnd = winClipboardCreateMessagingWindow(pDisplay, iWindow);
 
-    /* Save copy of HWND in screen privates */
+    /* Save copy of HWND */
     g_hwndClipboard = hwnd;
 
     /* Assert ownership of selections if Win32 clipboard is owned */
@@ -355,10 +355,7 @@ winClipboardProc(char *szDisplay)
  winClipboardProc_Done:
     /* Close our Windows window */
     if (g_hwndClipboard) {
-        /* Destroy the Window window (hwnd) */
-        winDebug("winClipboardProc - Destroy Windows window\n");
-        PostMessage(g_hwndClipboard, WM_DESTROY, 0, 0);
-        winClipboardFlushWindowsMessageQueue(g_hwndClipboard);
+        winClipboardWindowDestroy();
     }
 
     /* Close our X window */
@@ -489,3 +486,19 @@ winClipboardIOErrorHandler(Display * pDisplay)
 
     return 0;
 }
+
+void
+winClipboardWindowDestroy(void)
+{
+  if (g_hwndClipboard) {
+    SendMessage(g_hwndClipboard, WM_DESTROY, 0, 0);
+  }
+}
+
+void
+winFixClipboardChain(void)
+{
+  if (g_hwndClipboard) {
+    PostMessage(g_hwndClipboard, WM_WM_REINIT, 0, 0);
+  }
+}

hw/xwin/winglobals.c

@@ -94,7 +94,6 @@ winDispatchProcPtr winProcEstablishConnectionOrig = NULL;
 Bool g_fUnicodeClipboard = TRUE;
 Bool g_fClipboard = TRUE;
 Bool g_fClipboardStarted = FALSE;
-HWND g_hwndClipboard = NULL;
 #endif
 
 /*
@@ -106,7 +105,4 @@ void
 winInitializeGlobals(void)
 {
     g_dwCurrentThreadID = GetCurrentThreadId();
-#ifdef XWIN_CLIPBOARD
-    g_hwndClipboard = NULL;
-#endif
 }