C++ sk_atomic_inc函数代码示例

static int32_t next_id() {
    int32_t id;
    do {
        id = sk_atomic_inc(&gNextID);
    } while (id == SK_InvalidGenID);
    return id;
}

void AndroidPixelRef::globalRef(void* localref) {
    if (fWrappedPixelRef) {
        // delegate java obj management to the wrapped ref
        fWrappedPixelRef->globalRef(localref);

        // Note: we only ref and unref the wrapped AndroidPixelRef so that
        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
        return;
    }
    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
        JNIEnv *env = vm2env(fVM);

        // If JNI ref was passed, it is always used
        if (localref) fStorageObj = (jbyteArray) localref;

        if (fStorageObj == NULL) {
            SkDebugf("No valid local ref to create a JNI global ref\n");
            sk_throw();
        }
        if (fHasGlobalRef) {
            // This should never happen
            SkDebugf("Already holding a JNI global ref");
            sk_throw();
        }

        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
        // TODO: Check for failure here
        fHasGlobalRef = true;
    }
    ref();
}

SkColorSpace::SkColorSpace(SkColorLookUpTable* colorLUT, sk_sp<SkGammas> gammas,
                           const SkMatrix44& toXYZD50)
    : fColorLUT(colorLUT)
    , fGammas(gammas)
    , fToXYZD50(toXYZD50)
    , fUniqueID(sk_atomic_inc(&gUniqueColorSpaceID))
    , fNamed(kUnknown_Named)
{}

uint32_t GrProgramElement::CreateUniqueID() {
    static int32_t gUniqueID = SK_InvalidUniqueID;
    uint32_t id;
    do {
        id = static_cast<uint32_t>(sk_atomic_inc(&gUniqueID) + 1);
    } while (id == SK_InvalidUniqueID);
    return id;
}

uint32_t GrDrawTargetCaps::CreateUniqueID() {
    static int32_t gUniqueID = SK_InvalidUniqueID;
    uint32_t id;
    do {
        id = static_cast<uint32_t>(sk_atomic_inc(&gUniqueID) + 1);
    } while (id == SK_InvalidUniqueID);
    return id;
}

SkOSMenu::Item::Item(const char label[], SkOSMenu::Type type,
                     const char slotName[], SkEvent* evt) {
    fLabel.set(label);
    fSlotName.set(slotName);
    fType = type;
    fEvent = evt;
    fKey = 0;
    fID = sk_atomic_inc(&gOSMenuCmd);
}

static int32_t next_image_filter_unique_id() {
    static int32_t gImageFilterUniqueID;

    // Never return 0.
    int32_t id;
    do {
        id = sk_atomic_inc(&gImageFilterUniqueID) + 1;
    } while (0 == id);
    return id;
}

SkPicture::AccelData::Domain SkPicture::AccelData::GenerateDomain() {
    static int32_t gNextID = 0;

    int32_t id = sk_atomic_inc(&gNextID);
    if (id >= 1 << (8 * sizeof(Domain))) {
        SK_CRASH();
    }

    return static_cast<Domain>(id);
}

GrCacheID::Domain GrCacheID::GenerateDomain() {
    static int32_t gNextDomain = kInvalid_Domain + 1;

    int32_t domain = sk_atomic_inc(&gNextDomain);
    if (domain >= 1 << (8 * sizeof(Domain))) {
        GrCrash("Too many Cache Domains");
    }

    return static_cast<Domain>(domain);
}

SkBaseMutex* get_default_mutex() {
#ifdef PIXELREF_MUTEX_RING_COUNT
    // atomic_inc might be overkill here. It may be fine if once in a while
    // we hit a race-condition and two subsequent calls get the same index...
    int index = sk_atomic_inc(&gPixelRefMutexRingIndex);
    return &gPixelRefMutexRing[index & (PIXELREF_MUTEX_RING_COUNT - 1)];
#else
    return &gPixelRefMutex;
#endif
}

GrResourceKey::ResourceType GrResourceKey::GenerateResourceType() {
    static int32_t gNextType = 0;

    int32_t type = sk_atomic_inc(&gNextType);
    if (type >= (1 << 8 * sizeof(ResourceType))) {
        SkFAIL("Too many Resource Types");
    }

    return static_cast<ResourceType>(type);
}

uint32_t SkImage::NextUniqueID() {
    static int32_t gUniqueID;

    // never return 0;
    uint32_t id;
    do {
        id = sk_atomic_inc(&gUniqueID) + 1;
    } while (0 == id);
    return id;
}

static SkBaseMutex* get_default_mutex() {
    static int32_t gPixelRefMutexRingIndex;

    SkASSERT(SkIsPow2(PIXELREF_MUTEX_RING_COUNT));

    // atomic_inc might be overkill here. It may be fine if once in a while
    // we hit a race-condition and two subsequent calls get the same index...
    int index = sk_atomic_inc(&gPixelRefMutexRingIndex);
    return &gPixelRefMutexRing[index & (PIXELREF_MUTEX_RING_COUNT - 1)];
}

GrScratchKey::ResourceType GrScratchKey::GenerateResourceType() {
    static int32_t gType = INHERITED::kInvalidDomain + 1;

    int32_t type = sk_atomic_inc(&gType);
    if (type > SK_MaxU16) {
        SkFAIL("Too many Resource Types");
    }

    return static_cast<ResourceType>(type);
}

GrScratchKey::ResourceType GrScratchKey::GenerateResourceType() {
    static int32_t gType = INHERITED::kInvalidDomain + 1;

    int32_t type = sk_atomic_inc(&gType);
    if (type > SkTo<int32_t>(UINT16_MAX)) {
        SK_ABORT("Too many Resource Types");
    }

    return static_cast<ResourceType>(type);
}