projects / urcu.git / blame
| Commit | Line | Data |
|---|---|---|
| fdbddd0b PM |
1 | #ifndef _URCU_ARCH_UATOMIC_ARMV7L_H |
| 2 | #define _URCU_ARCH_UATOMIC_ARMV7L_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Atomics for ARMv7. This approach is usable on kernels back to 2.6.15. | |
| 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 | ||
| 50 | #endif /* _URCU_ARCH_UATOMIC_ARMV7L_H */ |