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