ace_napi/native_engine/impl/quickjs/quickjs_native_reference.cpp

/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "quickjs_headers.h"

#include "native_value/quickjs_native_value.h"
#include "quickjs_native_reference.h"

QuickJSNativeReference::QuickJSNativeReference(
    QuickJSNativeEngine* engine, NativeValue* value, uint32_t initialRefcount,
    NativeFinalize callback, void* data, void* hint)
    : engine_(engine), value_(*value), refCount_(initialRefcount), callback_(callback), data_(data),
    hint_(hint)
{
    for (uint32_t i = 0; i < initialRefcount; i++) {
        JS_DupValue(engine_->GetContext(), value_);
    }
}

QuickJSNativeReference::~QuickJSNativeReference()
{
    while (refCount_) {
        refCount_--;
        if (refCount_ == 0) {
            FinalizeCallback();
        }
        JS_FreeValue(engine_->GetContext(), value_);
    }
}

uint32_t QuickJSNativeReference::Ref()
{
    if (refCount_ >= 0) {
        ++refCount_;
        JS_DupValue(engine_->GetContext(), value_);
    }
    return refCount_;
}

uint32_t QuickJSNativeReference::Unref()
{
    if (refCount_ > 0) {
        --refCount_;
        if (refCount_ == 0) {
            FinalizeCallback();
        }
        JS_FreeValue(engine_->GetContext(), value_);
    }
    return refCount_;
}

NativeValue* QuickJSNativeReference::Get()
{
    return QuickJSNativeEngine::JSValueToNativeValue(engine_, JS_DupValue(engine_->GetContext(), value_));
}

QuickJSNativeReference::operator NativeValue*()
{
    return Get();
}

void QuickJSNativeReference::FinalizeCallback(void)
{
    if (callback_ != nullptr) {
        callback_(engine_, data_, hint_);
        JS_FreeFinalizer(value_);
    }
    callback_ = nullptr;
    data_ = nullptr;
    hint_ = nullptr;
}