Index: uspace/lib/wndmgt/private/wndmgt.h
===================================================================
--- uspace/lib/wndmgt/private/wndmgt.h	(revision 0761448df8f6e5a4d681a24b634ffc5ddbf890ad)
+++ uspace/lib/wndmgt/private/wndmgt.h	(revision 0761448df8f6e5a4d681a24b634ffc5ddbf890ad)
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2022 Jiri Svoboda
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libwndmgt
+ * @{
+ */
+/** @file
+ */
+
+#ifndef _LIBWNDMGT_PRIVATE_WNDMGT_H_
+#define _LIBWNDMGT_PRIVATE_WNDMGT_H_
+
+#include <async.h>
+#include <fibril_synch.h>
+#include <stdbool.h>
+
+/** Window management session structure */
+struct wndmgt {
+	/** Session with window management service */
+	async_sess_t *sess;
+	/** Callbacks */
+	wndmgt_cb_t *cb;
+	/** Calback argument */
+	void *cb_arg;
+	/** Synchronize access to window management object */
+	fibril_mutex_t lock;
+	/** @c true if callback handler terminated */
+	bool cb_done;
+	/** Signalled when cb_done or ev_pending is changed */
+	fibril_condvar_t cv;
+};
+
+#endif
+
+/** @}
+ */