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/*
* 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
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