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Unified Diff: src/ports/SkAtomics_android.h

Issue 19808007: Split atomic and mutex implementations and make inlinable. (Closed) Base URL: http://skia.googlecode.com/svn/trunk/
Patch Set: Address dependency comments. Created 7 years ago
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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
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