| 1 | /*
|
|---|
| 2 | * Copyright (c) 2006 Jakub Jermar
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 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
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 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
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 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
|
|---|
| 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
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libc
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #ifndef LIBC_ATOMICDFLT_H_
|
|---|
| 36 | #define LIBC_ATOMICDFLT_H_
|
|---|
| 37 |
|
|---|
| 38 | #ifndef LIBC_ARCH_ATOMIC_H_
|
|---|
| 39 | #error This file cannot be included directly, include atomic.h instead.
|
|---|
| 40 | #endif
|
|---|
| 41 |
|
|---|
| 42 | #include <stdint.h>
|
|---|
| 43 | #include <bool.h>
|
|---|
| 44 |
|
|---|
| 45 | typedef struct atomic {
|
|---|
| 46 | volatile atomic_count_t count;
|
|---|
| 47 | } atomic_t;
|
|---|
| 48 |
|
|---|
| 49 | static inline void atomic_set(atomic_t *val, atomic_count_t i)
|
|---|
| 50 | {
|
|---|
| 51 | val->count = i;
|
|---|
| 52 | }
|
|---|
| 53 |
|
|---|
| 54 | static inline atomic_count_t atomic_get(atomic_t *val)
|
|---|
| 55 | {
|
|---|
| 56 | return val->count;
|
|---|
| 57 | }
|
|---|
| 58 |
|
|---|
| 59 | #ifndef CAS
|
|---|
| 60 | static inline bool cas(atomic_t *val, atomic_count_t ov, atomic_count_t nv)
|
|---|
| 61 | {
|
|---|
| 62 | return __sync_bool_compare_and_swap(&val->count, ov, nv);
|
|---|
| 63 | }
|
|---|
| 64 | #endif
|
|---|
| 65 |
|
|---|
| 66 | #endif
|
|---|
| 67 |
|
|---|
| 68 | /** @}
|
|---|
| 69 | */
|
|---|
