// return promise
public JSValue Yield(ScriptContext context, object awaitObject)
{
if (awaitObject is System.Threading.Tasks.Task)
{
var resolving_funcs = new[] { JSApi.JS_UNDEFINED, JSApi.JS_UNDEFINED };
var promise = JSApi.JS_NewPromiseCapability(context, resolving_funcs);
var safeRelease = new SafeRelease(context).Append(resolving_funcs);
var task = awaitObject as System.Threading.Tasks.Task;
var runtime = context.GetRuntime();
task.GetAwaiter().OnCompleted(() =>
{
runtime.EnqueueAction(_OnTaskCompleted, new JSTaskCompletionArgs(task, safeRelease));
});
return(promise);
}
else if (awaitObject is IEnumerator)
{
//TODO: 合并 IEnumerator 和 YieldInstruction 写法
GetUnityContext();
if (_mb == null)
{
return(JSApi.JS_ThrowInternalError(context, "no MonoBehaviour for Coroutines"));
}
if (_mainThreadId != Thread.CurrentThread.ManagedThreadId)
{
return(JSApi.JS_ThrowInternalError(context, "not supported on background thread"));
}
var resolving_funcs = new[] { JSApi.JS_UNDEFINED, JSApi.JS_UNDEFINED };
var promise = JSApi.JS_NewPromiseCapability(context, resolving_funcs);
_mb.StartCoroutine(_Pending(awaitObject as IEnumerator, context, resolving_funcs));
return(promise);
}
else
{
GetUnityContext();
if (_mb == null)
{
return(JSApi.JS_ThrowInternalError(context, "no MonoBehaviour for Coroutines"));
}
if (_mainThreadId != Thread.CurrentThread.ManagedThreadId)
{
return(JSApi.JS_ThrowInternalError(context, "not supported on background thread"));
}
var resolving_funcs = new[] { JSApi.JS_UNDEFINED, JSApi.JS_UNDEFINED };
var promise = JSApi.JS_NewPromiseCapability(context, resolving_funcs);
_mb.StartCoroutine(_Pending(awaitObject as YieldInstruction, context, resolving_funcs));
return(promise);
}
}
private async void _Pending(Task task, ScriptContext context, JSValue[] resolving_funcs)
{
var safeRelease = new SafeRelease(context).Append(resolving_funcs);
await task;
if (!context.IsValid())
{
return;
}
object result = null;
var taskType = task.GetType();
if (taskType.IsGenericType && taskType.GetGenericTypeDefinition() == typeof(Task <>))
{
try
{
result = taskType.GetProperty("Result").GetValue(task);
}
catch (Exception exception)
{
context.GetLogger()?.WriteException(exception);
}
}
var ctx = (JSContext)context;
var backVal = Binding.Values.js_push_classvalue(ctx, result);
if (backVal.IsException())
{
ctx.print_exception();
safeRelease.Release();
return;
}
var argv = new[] { backVal };
var rval = JSApi.JS_Call(ctx, resolving_funcs[0], JSApi.JS_UNDEFINED, 1, argv);
JSApi.JS_FreeValue(ctx, backVal);
if (rval.IsException())
{
ctx.print_exception();
safeRelease.Release();
return;
}
JSApi.JS_FreeValue(ctx, rval);
safeRelease.Release();
context.GetRuntime().ExecutePendingJob();
}
private IEnumerator _Pending(IEnumerator enumerator, ScriptContext context, JSValue[] resolving_funcs)
{
var safeRelease = new SafeRelease(context).Append(resolving_funcs);
while (enumerator.MoveNext())
{
var current = enumerator.Current;
if (current is YieldInstruction)
{
yield return(current);
}
yield return(null);
}
if (!context.IsValid())
{
yield break;
}
var ctx = (JSContext)context;
var backVal = Binding.Values.js_push_var(ctx, enumerator.Current);
if (backVal.IsException())
{
ctx.print_exception();
safeRelease.Release();
yield break;
}
var argv = new[] { backVal };
var rval = JSApi.JS_Call(ctx, resolving_funcs[0], JSApi.JS_UNDEFINED, 1, argv);
JSApi.JS_FreeValue(ctx, backVal);
if (rval.IsException())
{
ctx.print_exception();
safeRelease.Release();
yield break;
}
JSApi.JS_FreeValue(ctx, rval);
safeRelease.Release();
context.GetRuntime().ExecutePendingJob();
}
public JSTaskCompletionArgs(System.Threading.Tasks.Task task, SafeRelease safeRelease)
{
this.task = task;
this.safeRelease = safeRelease;
}
