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6aca0125 JW |
1 | #ifndef _URCU_ARCH_UATOMIC_ARM_H |
2 | #define _URCU_ARCH_UATOMIC_ARM_H | |
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3 | |
4 | /* | |
6aca0125 | 5 | * Atomics for ARM. This approach is usable on kernels back to 2.6.15. |
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6 | * |
7 | * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. | |
8 | * Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved. | |
9 | * Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P. | |
10 | * Copyright (c) 2009 Mathieu Desnoyers | |
11 | * Copyright (c) 2010 Paul E. McKenney, IBM Corporation | |
12 | * (Adapted from uatomic_arch_ppc.h) | |
13 | * | |
14 | * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED | |
15 | * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. | |
16 | * | |
17 | * Permission is hereby granted to use or copy this program | |
18 | * for any purpose, provided the above notices are retained on all copies. | |
19 | * Permission to modify the code and to distribute modified code is granted, | |
20 | * provided the above notices are retained, and a notice that the code was | |
21 | * modified is included with the above copyright notice. | |
22 | * | |
23 | * Code inspired from libuatomic_ops-1.2, inherited in part from the | |
24 | * Boehm-Demers-Weiser conservative garbage collector. | |
25 | */ | |
26 | ||
27 | #include <urcu/compiler.h> | |
28 | #include <urcu/system.h> | |
29 | ||
30 | #ifdef __cplusplus | |
31 | extern "C" { | |
32 | #endif | |
33 | ||
34 | /* xchg */ | |
35 | #define uatomic_xchg(addr, v) __sync_lock_test_and_set(addr, v) | |
36 | ||
37 | /* cmpxchg */ | |
38 | #define uatomic_cmpxchg(addr, old, _new) \ | |
39 | __sync_val_compare_and_swap(addr, old, _new) | |
40 | ||
41 | /* uatomic_add_return */ | |
42 | #define uatomic_add_return(addr, v) __sync_add_and_fetch(addr, v) | |
43 | ||
44 | #ifdef __cplusplus | |
45 | } | |
46 | #endif | |
47 | ||
48 | #include <urcu/uatomic_generic.h> | |
49 | ||
6aca0125 | 50 | #endif /* _URCU_ARCH_UATOMIC_ARM_H */ |