public static bool duk_get_delegate <T>(IntPtr ctx, int idx, out T o)
where T : class
{
if (DuktapeDLL.duk_is_object(ctx, idx) ||/* && check if js delegate type (hidden property) */
DuktapeDLL.duk_is_function(ctx, idx))
{
var heapptr = DuktapeDLL.duk_get_heapptr(ctx, idx);
var cache = DuktapeVM.GetObjectCache(ctx);
DuktapeDelegate fn;
if (cache.TryGetDelegate(heapptr, out fn))
{
// Debug.LogWarningFormat("cache hit {0}", heapptr);
o = fn.target as T;
return(true);
}
// 默认赋值操作
DuktapeDLL.duk_dup(ctx, idx);
fn = new DuktapeDelegate(ctx, DuktapeDLL.duk_unity_ref(ctx));
var vm = DuktapeVM.GetVM(ctx);
o = vm.CreateDelegate(typeof(T), fn) as T;
// DuktapeDelegate 拥有 js 对象的强引用, 此 js 对象无法释放 cache 中的 object, 所以这里用弱引用注册
// 会出现的问题是, 如果 c# 没有对 DuktapeDelegate 的强引用, 那么反复 get_delegate 会重复创建 DuktapeDelegate
// Debug.LogWarningFormat("cache create : {0}", heapptr);
cache.AddDelegate(heapptr, fn);
return(true);
}
o = null;
return(false);
}
public static bool duk_get_delegate <T>(IntPtr ctx, int idx, out T o)
where T : class
{
//TODO: 20200320 !!! 如果 o 不是 jsobject, 且是 Delegate 但不是 DuktapeDelegate, 则 ... 处理
if (DuktapeDLL.duk_is_object(ctx, idx) || DuktapeDLL.duk_is_function(ctx, idx))
{
var heapptr = DuktapeDLL.duk_get_heapptr(ctx, idx);
var cache = DuktapeVM.GetObjectCache(ctx);
DuktapeDelegate fn;
if (cache.TryGetDelegate(heapptr, out fn))
{
// Debug.LogWarningFormat("cache hit {0}", heapptr);
o = fn.target as T;
return(true);
}
// 默认赋值操作
DuktapeDLL.duk_dup(ctx, idx);
fn = new DuktapeDelegate(ctx, DuktapeDLL.duk_unity_ref(ctx), heapptr);
var vm = DuktapeVM.GetVM(ctx);
o = vm.CreateDelegate(typeof(T), fn) as T;
// DuktapeDelegate 拥有 js 对象的强引用, 此 js 对象无法释放 cache 中的 object, 所以这里用弱引用注册
// 会出现的问题是, 如果 c# 没有对 DuktapeDelegate 的强引用, 那么反复 get_delegate 会重复创建 DuktapeDelegate
// Debug.LogWarningFormat("cache create : {0}", heapptr);
cache.AddDelegate(heapptr, fn);
return(true);
}
// else if (DuktapeDLL.duk_is_object(ctx, idx))
// {
// return duk_get_classvalue<T>(ctx, idx, out o);
// }
o = null;
return(false);
}
public void AddDelegate(IntPtr jso, DuktapeDelegate o)
{
_delegateMap[jso] = new WeakReference(o);
// 不能直接保留 o -> jso 的映射 (会产生o的强引用)
// Delegate 对 DuktapeDelegate 存在强引用 (首参), DuktapeDelegat 对 jsobject 存在强引用
// AddJSValue(o, jso);
}
public static bool duk_get_delegate <T>(IntPtr ctx, int idx, out T o)
where T : class
{
if (DuktapeDLL.duk_is_object(ctx, idx) ||/* && check if js delegate type (hidden property) */
DuktapeDLL.duk_is_function(ctx, idx))
{
DuktapeDLL.duk_get_prop_string(ctx, idx, DuktapeVM.OBJ_PROP_NATIVE_WEAK);
var refid = DuktapeDLL.duk_get_int(ctx, -1);
DuktapeDLL.duk_pop(ctx);
var cache = DuktapeVM.GetObjectCache(ctx);
DuktapeDelegate fn;
if (cache.TryGetTypedWeakObject(refid, out fn) && fn != null)
{
o = fn.target as T;
return(true);
}
// 默认赋值操作
DuktapeDLL.duk_dup(ctx, idx);
var heapptr = DuktapeDLL.duk_get_heapptr(ctx, idx);
fn = new DuktapeDelegate(ctx, DuktapeDLL.duk_unity_ref(ctx));
var vm = DuktapeVM.GetVM(ctx);
o = vm.CreateDelegate(typeof(T), fn) as T;
// DuktapeDelegate 拥有 js 对象的强引用, 此 js 对象无法释放 cache 中的 object, 所以这里用弱引用注册
// 会出现的问题是, 如果 c# 没有对 DuktapeDelegate 的强引用, 那么反复 get_delegate 会重复创建 DuktapeDelegate
refid = cache.AddWeakObject(fn);
DuktapeDLL.duk_unity_set_prop_i(ctx, idx, DuktapeVM.OBJ_PROP_NATIVE_WEAK, refid);
cache.AddJSValue(o, heapptr);
return(true);
}
o = null;
return(false);
}
public Delegate CreateDelegate(Type type, DuktapeDelegate fn)
{
MethodInfo method;
if (_delegates.TryGetValue(type, out method))
{
var target = Delegate.CreateDelegate(type, fn, method, true);
fn.target = target;
return(target);
}
return(null);
}
public bool TryGetDelegate(IntPtr jso, out DuktapeDelegate o)
{
WeakReference weakRef;
if (_delegateMap.TryGetValue(jso, out weakRef))
{
o = weakRef.Target as DuktapeDelegate;
return(o != null);
}
o = null;
return(false);
}
public void AddDelegate(IntPtr jso, DuktapeDelegate o)
{
_delegateMap[jso] = new WeakReference(o);
AddJSValue(o, jso);
}
