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307f78f3ed
MFC after: 1 week Reviewed by: bz, emaste, hselasky, manu Differential Revision: https://reviews.freebsd.org/D33562
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020-2021 Bjoern A. Zeeb
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUXKPI_LINUX_IOPOLL_H
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#define _LINUXKPI_LINUX_IOPOLL_H
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#include <sys/types.h>
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#include <sys/time.h>
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#include <linux/delay.h>
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#define read_poll_timeout(_pollfp, _var, _cond, _us, _to, _early_sleep, ...) \
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({ \
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struct timeval __now, __end; \
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if (_to) { \
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__end.tv_sec = (_to) / USEC_PER_SEC; \
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__end.tv_usec = (_to) % USEC_PER_SEC; \
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microtime(&__now); \
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timevaladd(&__end, &__now); \
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} \
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\
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if ((_early_sleep) && (_us) > 0) \
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usleep_range(_us, _us); \
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do { \
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(_var) = _pollfp(__VA_ARGS__); \
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if (_cond) \
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break; \
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if (_to) { \
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microtime(&__now); \
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if (timevalcmp(&__now, &__end, >)) \
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break; \
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} \
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if ((_us) != 0) \
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usleep_range(_us, _us); \
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} while (1); \
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(_cond) ? 0 : (-ETIMEDOUT); \
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})
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#define readx_poll_timeout(_pollfp, _addr, _var, _cond, _us, _to) \
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read_poll_timeout(_pollfp, _var, _cond, _us, _to, false, _addr)
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#define read_poll_timeout_atomic(_pollfp, _var, _cond, _us, _to, _early_sleep, ...) \
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({ \
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struct timeval __now, __end; \
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if (_to) { \
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__end.tv_sec = (_to) / USEC_PER_SEC; \
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__end.tv_usec = (_to) % USEC_PER_SEC; \
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microtime(&__now); \
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timevaladd(&__end, &__now); \
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} \
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\
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if ((_early_sleep) && (_us) > 0) \
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DELAY(_us); \
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do { \
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(_var) = _pollfp(__VA_ARGS__); \
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if (_cond) \
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break; \
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if (_to) { \
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microtime(&__now); \
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if (timevalcmp(&__now, &__end, >)) \
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break; \
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} \
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if ((_us) != 0) \
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DELAY(_us); \
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} while (1); \
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(_cond) ? 0 : (-ETIMEDOUT); \
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})
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#endif /* _LINUXKPI_LINUX_IOPOLL_H */
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