WebSVN – HelenOS-historic – Diff – /uspace/trunk/libc/arch/ppc32/include/atomic.h


/*
 * Copyright (C) 2005 Martin Decky
 * 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.
 */
 
 /** @addtogroup libcppc32 
 * @{
 */
/** @file
 */
 
#ifndef __ppc32_ATOMIC_H__
#define __ppc32_ATOMIC_H__
 
static inline void atomic_inc(atomic_t *val)
{
    long tmp;
 
    asm __volatile__ (
        "1:\n"
        "lwarx %0, 0, %2\n"
        "addic %0, %0, 1\n"
        "stwcx. %0, 0, %2\n"
        "bne- 1b"
        : "=&r" (tmp), "=m" (val->count)
        : "r" (&val->count), "m" (val->count)
        : "cc");
}
 
static inline void atomic_dec(atomic_t *val)
{
    long tmp;
 
    asm __volatile__(
        "1:\n"
        "lwarx %0, 0, %2\n"
        "addic %0, %0, -1\n"
        "stwcx. %0, 0, %2\n"
        "bne- 1b"
        : "=&r" (tmp), "=m" (val->count)
        : "r" (&val->count), "m" (val->count)
        : "cc");
}
 
static inline long atomic_postinc(atomic_t *val)
{
    atomic_inc(val);
    return val->count - 1;
}
 
static inline long atomic_postdec(atomic_t *val)
{
    atomic_dec(val);
    return val->count + 1;
}
 
static inline long atomic_preinc(atomic_t *val)
{
    atomic_inc(val);
    return val->count;
}
 
static inline long atomic_predec(atomic_t *val)
{
    atomic_dec(val);
    return val->count;
}
 
#endif
 
 /** @}
 */
 
 

Rev 1217	Rev 1656
1	/*	1	/*
2	* Copyright (C) 2005 Martin Decky	2	* Copyright (C) 2005 Martin Decky
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	/** @addtogroup libcppc32
-		30	* @{
-		31	*/
-		32	/** @file
-		33	*/
-		34
29	#ifndef __ppc32_ATOMIC_H__	35	#ifndef __ppc32_ATOMIC_H__
30	#define __ppc32_ATOMIC_H__	36	#define __ppc32_ATOMIC_H__
31		37
32	static inline void atomic_inc(atomic_t *val)	38	static inline void atomic_inc(atomic_t *val)
33	{	39	{
34	long tmp;	40	long tmp;
35		41
36	asm __volatile__ (	42	asm __volatile__ (
37	"1:\n"	43	"1:\n"
38	"lwarx %0, 0, %2\n"	44	"lwarx %0, 0, %2\n"
39	"addic %0, %0, 1\n"	45	"addic %0, %0, 1\n"
40	"stwcx. %0, 0, %2\n"	46	"stwcx. %0, 0, %2\n"
41	"bne- 1b"	47	"bne- 1b"
42	: "=&r" (tmp), "=m" (val->count)	48	: "=&r" (tmp), "=m" (val->count)
43	: "r" (&val->count), "m" (val->count)	49	: "r" (&val->count), "m" (val->count)
44	: "cc");	50	: "cc");
45	}	51	}
46		52
47	static inline void atomic_dec(atomic_t *val)	53	static inline void atomic_dec(atomic_t *val)
48	{	54	{
49	long tmp;	55	long tmp;
50		56
51	asm __volatile__(	57	asm __volatile__(
52	"1:\n"	58	"1:\n"
53	"lwarx %0, 0, %2\n"	59	"lwarx %0, 0, %2\n"
54	"addic %0, %0, -1\n"	60	"addic %0, %0, -1\n"
55	"stwcx. %0, 0, %2\n"	61	"stwcx. %0, 0, %2\n"
56	"bne- 1b"	62	"bne- 1b"
57	: "=&r" (tmp), "=m" (val->count)	63	: "=&r" (tmp), "=m" (val->count)
58	: "r" (&val->count), "m" (val->count)	64	: "r" (&val->count), "m" (val->count)
59	: "cc");	65	: "cc");
60	}	66	}
61		67
62	static inline long atomic_postinc(atomic_t *val)	68	static inline long atomic_postinc(atomic_t *val)
63	{	69	{
64	atomic_inc(val);	70	atomic_inc(val);
65	return val->count - 1;	71	return val->count - 1;
66	}	72	}
67		73
68	static inline long atomic_postdec(atomic_t *val)	74	static inline long atomic_postdec(atomic_t *val)
69	{	75	{
70	atomic_dec(val);	76	atomic_dec(val);
71	return val->count + 1;	77	return val->count + 1;
72	}	78	}
73		79
74	static inline long atomic_preinc(atomic_t *val)	80	static inline long atomic_preinc(atomic_t *val)
75	{	81	{
76	atomic_inc(val);	82	atomic_inc(val);
77	return val->count;	83	return val->count;
78	}	84	}
79		85
80	static inline long atomic_predec(atomic_t *val)	86	static inline long atomic_predec(atomic_t *val)
81	{	87	{
82	atomic_dec(val);	88	atomic_dec(val);
83	return val->count;	89	return val->count;
84	}	90	}
85		91
86	#endif	92	#endif
-		93
-		94	/** @}
-		95	*/
-		96
87		97

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/libc/arch/ppc32/include/atomic.h – Rev 1217 → 1656