Index: src/ports/SkAtomics_android.h |
=================================================================== |
--- src/ports/SkAtomics_android.h (revision 0) |
+++ src/ports/SkAtomics_android.h (working copy) |
@@ -0,0 +1,46 @@ |
+/* |
+ * Copyright 2013 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#ifndef SkAtomics_android_DEFINED |
+#define SkAtomics_android_DEFINED |
+ |
+/** Android framework atomics. */ |
+ |
+#include <cutils/atomic.h> |
+#include <stdint.h> |
+ |
+#define sk_atomic_inc(addr) android_atomic_inc(addr) |
+#define sk_atomic_add(addr, inc) android_atomic_add(inc, addr) |
+#define sk_atomic_dec(addr) android_atomic_dec(addr) |
+ |
+static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_dec() { |
+ //HACK: Android is actually using full memory barriers. |
+ // Should this change, uncomment below. |
+ //int dummy; |
+ //android_atomic_acquire_store(0, &dummy); |
+} |
+ |
+static inline __attribute__((always_inline)) int32_t sk_atomic_conditional_inc(int32_t* addr) { |
+ while (true) { |
+ int32_t value = *addr; |
+ if (value == 0) { |
+ return 0; |
+ } |
+ if (0 == android_atomic_release_cas(value, value + 1, addr)) { |
+ return value; |
+ } |
+ } |
+} |
+ |
+static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_conditional_inc() { |
+ //HACK: Android is actually using full memory barriers. |
+ // Should this change, uncomment below. |
+ //int dummy; |
+ //android_atomic_acquire_store(0, &dummy); |
+} |
+ |
+#endif |