dcbd6e358a
git-svn-id: http://skia.googlecode.com/svn/trunk@3025 2bbb7eff-a529-9590-31e7-b0007b416f81
100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkThread_platform_DEFINED
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#define SkThread_platform_DEFINED
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#if defined(SK_BUILD_FOR_ANDROID)
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#if defined(SK_BUILD_FOR_ANDROID_NDK)
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#include <stdint.h>
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/* Just use the GCC atomic intrinsics. They're supported by the NDK toolchain,
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* have reasonable performance, and provide full memory barriers
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*/
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static __attribute__((always_inline)) int32_t sk_atomic_inc(int32_t *addr) {
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return __sync_fetch_and_add(addr, 1);
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}
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static __attribute__((always_inline)) int32_t sk_atomic_dec(int32_t *addr) {
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return __sync_fetch_and_add(addr, -1);
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}
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#else // !SK_BUILD_FOR_ANDROID_NDK
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/* The platform atomics operations are slightly more efficient than the
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* GCC built-ins, so use them.
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*/
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#include <utils/Atomic.h>
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#define sk_atomic_inc(addr) android_atomic_inc(addr)
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#define sk_atomic_dec(addr) android_atomic_dec(addr)
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#endif // !SK_BUILD_FOR_ANDROID_NDK
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#else // !SK_BUILD_FOR_ANDROID
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/** Implemented by the porting layer, this function adds 1 to the int specified
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by the address (in a thread-safe manner), and returns the previous value.
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*/
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SK_API int32_t sk_atomic_inc(int32_t* addr);
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/** Implemented by the porting layer, this function subtracts 1 to the int
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specified by the address (in a thread-safe manner), and returns the previous
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value.
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*/
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SK_API int32_t sk_atomic_dec(int32_t* addr);
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#endif // !SK_BUILD_FOR_ANDROID
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#if defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_ANDROID_NDK)
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#include <utils/threads.h>
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class SkMutex : android::Mutex {
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public:
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SkMutex() {}
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~SkMutex() {}
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void acquire() { this->lock(); }
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void release() { this->unlock(); }
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};
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#else
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/** Implemented by the porting layer, this function adds 1 to the int specified
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by the address (in a thread-safe manner), and returns the previous value.
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*/
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SK_API int32_t sk_atomic_inc(int32_t* addr);
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/** Implemented by the porting layer, this function subtracts 1 to the int
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specified by the address (in a thread-safe manner), and returns the previous
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value.
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*/
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SK_API int32_t sk_atomic_dec(int32_t* addr);
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class SkMutex {
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public:
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SkMutex();
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~SkMutex();
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void acquire();
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void release();
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private:
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bool fIsGlobal;
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enum {
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kStorageIntCount = 64
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};
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uint32_t fStorage[kStorageIntCount];
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};
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#endif
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#endif
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