#ifndef _UST_WAIT_H

#define _UST_WAIT_H

/*

 * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; version 2.1 of

 * the License.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

 */

#include <poll.h>

/*

 * Wait until "cond" gets true or timeout (in ms).

 */

#define wait_cond_interruptible_timeout(_cond, _timeout)	\

	({							\

		int __ret = 0, __pollret;			\

		int __timeout = _timeout;			\

								\

		for (;;) {					\

			if (_cond)				\

				break;				\

			if (__timeout <= 0) {			\

				__ret = -ETIMEDOUT;		\

				break;				\

			}					\

			__pollret = poll(NULL, 0, 10);	/* wait 10ms */	\

			if (__pollret < 0) {			\

				__ret = -errno;			\

				break;				\

			}					\

			__timeout -= 10;			\

		}						\

		__ret;						\

	})

#endif /* _UST_WAIT_H */