com.whl.quickjs.wrapper.QuickJSFunction Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wrapper-java Show documentation

Quickjs wrapper library for Android/JVM.

There is a newer version: 2.2.1

package com.whl.quickjs.wrapper;

/**
 * Created by Harlon Wang on 2024/2/12.
 */
public class QuickJSFunction extends QuickJSObject implements JSFunction {

    /**
     * 函数执行状态
     */
    enum Status {
        NOT_STARTED,
        IN_PROGRESS,
        COMPLETED
    }
    private int stashTimes = 0;
    private Status currentStatus = Status.NOT_STARTED;

    private final long thisPointer;

    public QuickJSFunction(QuickJSContext context, long pointer, long thisPointer) {
        super(context, pointer);
        this.thisPointer = thisPointer;
    }

    @Override
    public void release() {
        // call 函数未执行完，触发了 release 操作，会导致 quickjs 野指针异常，
        // 这里暂存一下，待函数执行完，才执行 release。
        if (currentStatus == Status.IN_PROGRESS) {
            stashTimes++;
            return;
        }
        super.release();
    }

    @Override
    public Object call(Object... args) {
        checkRefCountIsZero();

        currentStatus = Status.IN_PROGRESS;
        Object ret = getContext().call(this, thisPointer, args);
        currentStatus = Status.COMPLETED;

        if (stashTimes > 0) {
            // 如果有暂存，这里需要恢复下 release 操作
            for (int i = 0; i < stashTimes; i++) {
                release();
            }
            stashTimes = 0;
        }
        return ret;
    }

    @Override
    public void callVoid(Object... args) {
        Object ret = call(args);
        if (ret instanceof JSObject) {
            ((JSObject) ret).release();
        }
    }

}