GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/thread/synch.h Lines: 0 13 0.0 %
Date: 2017-11-13 Branches: 0 10 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: synch.h,v 1.2 2017/09/05 02:40:54 guenther Exp $ */
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/*
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 * Copyright (c) 2017 Martin Pieuchot
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/atomic.h>
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#include <sys/time.h>
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#include <sys/futex.h>
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static inline int
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_wake(volatile uint32_t *p, int n)
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{
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	return futex(p, FUTEX_WAKE, n, NULL, NULL);
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}
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static inline void
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_wait(volatile uint32_t *p, int val)
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{
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	while (*p != (uint32_t)val)
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		futex(p, FUTEX_WAIT, val, NULL, NULL);
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}
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static inline int
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_twait(volatile uint32_t *p, int val, clockid_t clockid, const struct timespec *abs)
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{
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	struct timespec rel;
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	if (abs == NULL)
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		return futex(p, FUTEX_WAIT, val, NULL, NULL);
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	if (abs->tv_nsec >= 1000000000 || clock_gettime(clockid, &rel))
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		return (EINVAL);
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	rel.tv_sec = abs->tv_sec - rel.tv_sec;
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	if ((rel.tv_nsec = abs->tv_nsec - rel.tv_nsec) < 0) {
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		rel.tv_sec--;
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		rel.tv_nsec += 1000000000;
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	}
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	if (rel.tv_sec < 0)
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		return (ETIMEDOUT);
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	return futex(p, FUTEX_WAIT, val, &rel, NULL);
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}
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static inline int
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_requeue(volatile uint32_t *p, int n, int m, volatile uint32_t *q)
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{
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	return futex(p, FUTEX_REQUEUE, n, (void *)(long)m, q);
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}