WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia64/include/atomic.h


/*
 * Copyright (C) 2005 Jakub Jermar
 * 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.
 */
 
#ifndef __ia64_ATOMIC_H__
#define __ia64_ATOMIC_H__
 
#include <arch/types.h>
 
typedef struct { volatile __u64 count; } atomic_t;
 
/** Atomic addition.
 *
 * @param val Atomic value.
 * @param imm Value to add.
 *
 * @return Value before addition.
 */
static inline count_t atomic_add(atomic_t *val, int imm)
{
    count_t v;
 
    __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm));
 
    return v;
}
 
static inline void atomic_set(atomic_t *val, __u64 i)
{
    val->count = i;
}
 
static inline __u32 atomic_get(atomic_t *val)
{
    return val->count;
}
 
static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }
 
static inline count_t atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; }
static inline count_t atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; }
 
static inline count_t atomic_postinc(atomic_t *val) { return atomic_add(val, 1); }
static inline count_t atomic_postdec(atomic_t *val) { return atomic_add(val, -1); }
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia64/include/atomic.h – Rev 627 → 1024

Rev 627		Rev 1024
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#ifndef __ia64_ATOMIC_H__	29	#ifndef __ia64_ATOMIC_H__
30	#define __ia64_ATOMIC_H__	30	#define __ia64_ATOMIC_H__
31		31
32	#include <arch/types.h>	32	#include <arch/types.h>
33		33
34	typedef struct { volatile __u64 count; } atomic_t;	34	typedef struct { volatile __u64 count; } atomic_t;
35		35
36	/** Atomic addition.	36	/** Atomic addition.
37	*	37	*
38	* @param val Atomic value.	38	* @param val Atomic value.
39	* @param imm Value to add.	39	* @param imm Value to add.
40	*	40	*
41	* @return Value after addition.	41	* @return Value before addition.
42	*/	42	*/
43	static inline count_t atomic_add(atomic_t *val, int imm)	43	static inline count_t atomic_add(atomic_t *val, int imm)
44	{	44	{
45	count_t v;	45	count_t v;
46		46
47	__asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm));	47	__asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm));
48		48
49	return v;	49	return v;
50	}	50	}
51		51
52	static inline void atomic_set(atomic_t *val, __u64 i)	52	static inline void atomic_set(atomic_t *val, __u64 i)
53	{	53	{
54	val->count = i;	54	val->count = i;
55	}	55	}
56		56
57	static inline __u32 atomic_get(atomic_t *val)	57	static inline __u32 atomic_get(atomic_t *val)
58	{	58	{
59	return val->count;	59	return val->count;
60	}	60	}
61		61
62	static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }	62	static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
63	static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }	63	static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }
64		64
65	static inline count_t atomic_inc_pre(atomic_t *val) { return atomic_add(val, 1); }	65	static inline count_t atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; }
66	static inline count_t atomic_dec_pre(atomic_t *val) { return atomic_add(val, -1); }	66	static inline count_t atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; }
67		67
68	static inline count_t atomic_inc_post(atomic_t *val) { return atomic_add(val, 1) + 1; }	68	static inline count_t atomic_postinc(atomic_t *val) { return atomic_add(val, 1); }
69	static inline count_t atomic_dec_post(atomic_t *val) { return atomic_add(val, -1) - 1; }	69	static inline count_t atomic_postdec(atomic_t *val) { return atomic_add(val, -1); }
70		70
71	#endif	71	#endif
72		72