src/ports/SkAtomics_none.h - Issue 295373005: Drop support for non-atomic non-mutex platforms.

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Side by Side Diff: src/ports/SkAtomics_none.h

Issue 295373005: Drop support for non-atomic non-mutex platforms. (Closed) Base URL: https://skia.googlesource.com/skia.git@master

Patch Set: rebase Created 6 years, 6 months ago

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1 /*

2 * Copyright 2013 Google Inc.

3 *

4 * Use of this source code is governed by a BSD-style license that can be

5 * found in the LICENSE file.

6 */

7

8 #ifndef SkAtomics_none_DEFINED

9 #define SkAtomics_none_DEFINED

10

11 /** Non-atomic atomics for uniprocessor systems. */

12

13 #include <stdint.h>

14

15 static inline int32_t sk_atomic_inc(int32_t* addr) {

16 int32_t value = *addr;

17 *addr = value + 1;

18 return value;

19 }

20

21 static inline int32_t sk_atomic_add(int32_t* addr, int32_t inc) {

22 int32_t value = *addr;

23 *addr = value + inc;

24 return value;

25 }

26

27 static inline int32_t sk_atomic_dec(int32_t* addr) {

28 int32_t value = *addr;

29 *addr = value - 1;

30 return value;

31 }

32

33 static inline void sk_membar_acquire__after_atomic_dec() { }

34

35 static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) {

36 if (*addr != before) return false;

37 *addr = after;

38 return true;

39 }

40

41 static inline void sk_membar_acquire__after_atomic_conditional_inc() { }

42

43 #endif

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