rculfhash: stress requirement in documentation
[urcu.git] / urcu / arch / arm.h
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1#ifndef _URCU_ARCH_ARM_H
2#define _URCU_ARCH_ARM_H
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3
4/*
6aca0125 5 * arch_arm.h: trivial definitions for the ARM architecture.
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6 *
7 * Copyright (c) 2010 Paul E. McKenney, IBM Corporation.
6982d6d7 8 * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include <urcu/compiler.h>
26#include <urcu/config.h>
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
e95ee429 32#ifdef CONFIG_RCU_ARM_HAVE_DMB
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33#define cmm_mb() asm volatile("dmb":::"memory")
34#define cmm_rmb() asm volatile("dmb":::"memory")
35#define cmm_wmb() asm volatile("dmb":::"memory")
e95ee429 36#endif /* CONFIG_RCU_ARM_HAVE_DMB */
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37
38#include <stdlib.h>
39#include <sys/time.h>
40
41typedef unsigned long long cycles_t;
42
71bce82c 43static inline cycles_t caa_get_cycles (void)
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44{
45 cycles_t thetime;
46 struct timeval tv;
47
48 if (gettimeofday(&tv, NULL) != 0)
49 return 0;
50 thetime = ((cycles_t)tv.tv_sec) * 1000000ULL + ((cycles_t)tv.tv_usec);
51 return (cycles_t)thetime;
52}
53
54#ifdef __cplusplus
55}
56#endif
57
1b9119f8 58#include <urcu/arch/generic.h>
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6aca0125 60#endif /* _URCU_ARCH_ARM_H */
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