commit 37b1258f0a288a79ce6a3eef3559e17a67c4dd96
Author: Thomas Jaeger <thjaeger@gmail.com>
Date:   Tue Apr 1 15:27:06 2008 +0300

    XKB: Fix processInputProc wrapping
    
    If input processing is frozen, only wrap realInputProc: don't smash
    processInputProc as well.  When input processing is thawed, pIP will be
    rewrapped correctly.
    
    This supersedes the previous workaround in 50e80c9.
    
    Signed-off-by: Daniel Stone <daniel@fooishbar.org>

diff --git a/include/xkbsrv.h b/include/xkbsrv.h
index ef99e94..040bb93 100644
--- a/include/xkbsrv.h
+++ b/include/xkbsrv.h
@@ -237,6 +237,14 @@ typedef struct	_XkbSrvLedInfo {
 typedef struct
 {
     ProcessInputProc processInputProc;
+    /* If processInputProc is set to something different than realInputProc,
+     * UNWRAP and COND_WRAP will not touch processInputProc and update only
+     * realInputProc.  This ensures that
+     *   processInputProc == (frozen ? EnqueueEvent : realInputProc)
+     *
+     * WRAP_PROCESS_INPUT_PROC should only be called during initialization,
+     * since it may destroy this invariant.
+     */
     ProcessInputProc realInputProc;
     DeviceUnwrapProc unwrapProc;
 } xkbDeviceInfoRec, *xkbDeviceInfoPtr;
@@ -254,14 +262,14 @@ typedef struct
 	    device->public.processInputProc = proc; \
 	oldprocs->processInputProc = \
 	oldprocs->realInputProc = device->public.realInputProc; \
-	if (proc != device->public.enqueueInputProc) \
-		device->public.realInputProc = proc; \
+	device->public.realInputProc = proc; \
 	oldprocs->unwrapProc = device->unwrapProc; \
 	device->unwrapProc = unwrapproc;
 
 #define UNWRAP_PROCESS_INPUT_PROC(device, oldprocs, backupproc) \
-        backupproc = device->public.processInputProc; \
-	device->public.processInputProc = oldprocs->processInputProc; \
+        backupproc = device->public.realInputProc; \
+	if (device->public.processInputProc == device->public.realInputProc)\
+	    device->public.processInputProc = oldprocs->realInputProc; \
 	device->public.realInputProc = oldprocs->realInputProc; \
 	device->unwrapProc = oldprocs->unwrapProc;
 
diff --git a/xkb/xkbActions.c b/xkb/xkbActions.c
index 890cf42..8c72874 100644
--- a/xkb/xkbActions.c
+++ b/xkb/xkbActions.c
@@ -49,15 +49,14 @@ xkbUnwrapProc(DeviceIntPtr device, DeviceHandleProc proc,
                    pointer data)
 {
     xkbDeviceInfoPtr xkbPrivPtr = XKBDEVICEINFO(device);
-    ProcessInputProc tmp = device->public.processInputProc;
-    ProcessInputProc dummy; /* unused, but neede for macro */
+    ProcessInputProc backupproc;
     if(xkbPrivPtr->unwrapProc)
 	xkbPrivPtr->unwrapProc = NULL;
 
-    UNWRAP_PROCESS_INPUT_PROC(device,xkbPrivPtr, dummy);
+    UNWRAP_PROCESS_INPUT_PROC(device,xkbPrivPtr, backupproc);
     proc(device,data);
-    WRAP_PROCESS_INPUT_PROC(device,xkbPrivPtr,
-			    tmp,xkbUnwrapProc);
+    COND_WRAP_PROCESS_INPUT_PROC(device,xkbPrivPtr,
+				 backupproc,xkbUnwrapProc);
 }