gfx/skia/trunk/src/ports/SkAtomics_android.h@129ffea94266
gfx/skia/trunk/src/ports/SkAtomics_android.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
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 */
8 #ifndef SkAtomics_android_DEFINED
9 #define SkAtomics_android_DEFINED
11 /** Android framework atomics. */
13 #include <cutils/atomic.h>
14 #include <stdint.h>
16 static inline __attribute__((always_inline)) int32_t sk_atomic_inc(int32_t* addr) {
17 return android_atomic_inc(addr);
18 }
20 static inline __attribute__((always_inline)) int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
21 return android_atomic_add(inc, addr);
22 }
24 static inline __attribute__((always_inline)) int32_t sk_atomic_dec(int32_t* addr) {
25 return android_atomic_dec(addr);
26 }
28 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_dec() {
29 //HACK: Android is actually using full memory barriers.
30 // Should this change, uncomment below.
31 //int dummy;
32 //android_atomic_acquire_store(0, &dummy);
33 }
35 static inline __attribute__((always_inline)) int32_t sk_atomic_conditional_inc(int32_t* addr) {
36 while (true) {
37 int32_t value = *addr;
38 if (value == 0) {
39 return 0;
40 }
41 if (0 == android_atomic_release_cas(value, value + 1, addr)) {
42 return value;
43 }
44 }
45 }
47 static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr,
48 int32_t before,
49 int32_t after) {
50 // android_atomic_release_cas returns 0 for success (if *addr == before and it wrote after).
51 return android_atomic_release_cas(before, after, addr) == 0;
52 }
54 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_conditional_inc() {
55 //HACK: Android is actually using full memory barriers.
56 // Should this change, uncomment below.
57 //int dummy;
58 //android_atomic_acquire_store(0, &dummy);
59 }
61 #endif
