xlua - lua协程与Unity协程

lua实现IEnumerator接口：Assets/Lua/LuaEnumeratorImpl.lua.txt

local Move_End_Flag = {}

local LuaEnumeratorImpl = {}
LuaEnumeratorImpl.__index = LuaEnumeratorImpl

function LuaEnumeratorImpl.new(coRun)
    local obj = {}
    setmetatable(obj, LuaEnumeratorImpl)
    obj:ctor(coRun)
    return obj
end

function LuaEnumeratorImpl:ctor(coRun)
    self.Current = nil
    self.m_CoFunc = function()
        coRun()
        return Move_End_Flag
    end
    self.m_Co = nil
end

function LuaEnumeratorImpl:MoveNext()
    local isSucc, result = coroutine.resume(self.m_Co) --返回值result为yield的参数
    self.Current = result
    if self.Current == Move_End_Flag then
        self.Current = nil
        return false
    end
    return true
end

function LuaEnumeratorImpl:Reset()
    self.m_Co = coroutine.create(self.m_CoFunc)
end

return LuaEnumeratorImpl

 

Assets/Lua/Test3.lua.txt

local LuaEnumeratorImplClazz = require("Lua.LuaEnumeratorImpl")

local enu = nil
--该lua table会映射为c#的IEnumerator接口实现对象, StartCoroutine的参数也是IEnumerator类型
enu = LuaEnumeratorImplClazz.new(function()
    print("stop coroutine after 5 seconds")
    coroutine.yield(CS.UnityEngine.WaitForSeconds(5)) --co.resume将拿到WaitForSeconds
    Test3MonoInst:StopCoroutine(enu)
    print("coroutine stoped")
end)
enu:Reset()

Test3MonoInst:StartCoroutine(enu) --会执行enu:MoveNext()

上面的代码等同于

private IEnumerator m_Enu;

void Start()
{
    m_Enu = MyCo();
    StartCoroutine(m_Enu);
}

IEnumerator MyCo()
{
    Debug.Log($"stop coroutine after 5 seconds");
    yield return new WaitForSeconds(5);
    StopCoroutine(m_Enu);
    Debug.Log($"coroutine stoped");
}

 

 

Test3.cs

public class Test3 : MonoBehaviour
{
    private LuaEnv m_LuaEnv;

    void Start()
    {
        m_LuaEnv = new LuaEnv();
        m_LuaEnv.AddLoader((ref string filePath) =>
        {
            filePath = filePath.Replace('.', '/');
            filePath = $"Assets/{filePath}.lua.txt";
            var txtAsset = AssetDatabase.LoadAssetAtPath<TextAsset>(filePath);
            return Encoding.UTF8.GetBytes(txtAsset.text);
        });

        m_LuaEnv.Global.Set("Test3MonoInst", this); //在lua中增加一个全局变量，可以在lua中用TestMonoInst来访问c#对象
        m_LuaEnv.DoString("require('Lua.Test3')");
    }

    void OnDestroy()
    {
        if (null != m_LuaEnv)
        {
            m_LuaEnv.Dispose();
        }
    }

}