1 /*
2 * Copyright (c) 1997-2015, Wind River Systems, Inc.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #ifndef ZEPHYR_INCLUDE_SYS_ATOMIC_C_H_
8 #define ZEPHYR_INCLUDE_SYS_ATOMIC_C_H_
9
10 /* Included from <atomic.h> */
11
12 #ifdef __cplusplus
13 extern "C" {
14 #endif
15
16 /* Simple and correct (but very slow) implementation of atomic
17 * primitives that require nothing more than kernel interrupt locking.
18 */
19
20 __syscall bool atomic_cas(atomic_t *target, atomic_val_t old_value,
21 atomic_val_t new_value);
22
23 __syscall bool atomic_ptr_cas(atomic_ptr_t *target, atomic_ptr_val_t old_value,
24 atomic_ptr_val_t new_value);
25
26 __syscall atomic_val_t atomic_add(atomic_t *target, atomic_val_t value);
27
28 __syscall atomic_val_t atomic_sub(atomic_t *target, atomic_val_t value);
29
atomic_inc(atomic_t * target)30 static inline atomic_val_t atomic_inc(atomic_t *target)
31 {
32 return atomic_add(target, 1);
33
34 }
35
atomic_dec(atomic_t * target)36 static inline atomic_val_t atomic_dec(atomic_t *target)
37 {
38 return atomic_sub(target, 1);
39
40 }
41
42 atomic_val_t atomic_get(const atomic_t *target);
43
44 atomic_ptr_val_t atomic_ptr_get(const atomic_ptr_t *target);
45
46 __syscall atomic_val_t atomic_set(atomic_t *target, atomic_val_t value);
47
48 __syscall atomic_ptr_val_t atomic_ptr_set(atomic_ptr_t *target, atomic_ptr_val_t value);
49
atomic_clear(atomic_t * target)50 static inline atomic_val_t atomic_clear(atomic_t *target)
51 {
52 return atomic_set(target, 0);
53
54 }
55
atomic_ptr_clear(atomic_ptr_t * target)56 static inline atomic_ptr_val_t atomic_ptr_clear(atomic_ptr_t *target)
57 {
58 return atomic_ptr_set(target, NULL);
59
60 }
61
62 __syscall atomic_val_t atomic_or(atomic_t *target, atomic_val_t value);
63
64 __syscall atomic_val_t atomic_xor(atomic_t *target, atomic_val_t value);
65
66 __syscall atomic_val_t atomic_and(atomic_t *target, atomic_val_t value);
67
68 __syscall atomic_val_t atomic_nand(atomic_t *target, atomic_val_t value);
69
70 #ifdef __cplusplus
71 }
72 #endif
73
74 #ifdef CONFIG_ATOMIC_OPERATIONS_C
75
76 #ifndef DISABLE_SYSCALL_TRACING
77 /* Skip defining macros of atomic_*() for syscall tracing.
78 * Compiler does not like "({ ... tracing code ... })" and complains
79 *
80 * error: expected identifier or '(' before '{' token
81 *
82 * ... even though there is a '(' before '{'.
83 */
84 #define DISABLE_SYSCALL_TRACING
85 #define _REMOVE_DISABLE_SYSCALL_TRACING
86 #endif
87
88 #include <syscalls/atomic_c.h>
89
90 #ifdef _REMOVE_DISABLE_SYSCALL_TRACING
91 #undef DISABLE_SYSCALL_TRACING
92 #undef _REMOVE_DISABLE_SYSCALL_TRACING
93 #endif
94
95 #endif
96
97 #endif /* ZEPHYR_INCLUDE_SYS_ATOMIC_C_H_ */
98
