68 lines
2.1 KiB
C#
68 lines
2.1 KiB
C#
|
/* ****************************************************************************
|
||
|
|
*
|
||
|
|
* Copyright (c) Microsoft Corporation.
|
||
|
|
*
|
||
|
|
* This source code is subject to terms and conditions of the Microsoft Public License. A
|
||
|
|
* copy of the license can be found in the License.html file at the root of this distribution. If
|
||
|
|
* you cannot locate the Microsoft Public License, please send an email to
|
||
|
|
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
|
||
|
|
* by the terms of the Microsoft Public License.
|
||
|
|
*
|
||
|
|
* You must not remove this notice, or any other, from this software.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* ***************************************************************************/
|
||
|
|
using System; using Microsoft;
|
||
|
|
|
||
|
|
|
||
|
|
using System.Diagnostics;
|
||
|
|
#if CODEPLEX_40
|
||
|
|
using System.Linq.Expressions;
|
||
|
|
#else
|
||
|
|
using Microsoft.Linq.Expressions;
|
||
|
|
#endif
|
||
|
|
using System.Runtime.CompilerServices;
|
||
|
|
#if !CODEPLEX_40
|
||
|
|
using Microsoft.Runtime.CompilerServices;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#if CODEPLEX_40
|
||
|
|
namespace System.Dynamic {
|
||
|
|
#else
|
||
|
|
namespace Microsoft.Scripting {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
internal sealed class SplatCallSite {
|
||
|
|
// Stored callable Delegate or IDynamicMetaObjectProvider.
|
||
|
|
internal readonly object _callable;
|
||
|
|
|
||
|
|
// Can the number of arguments to a given event change each call?
|
||
|
|
// If not, we don't need this level of indirection--we could cache a
|
||
|
|
// delegate that does the splatting.
|
||
|
|
internal CallSite<Func<CallSite, object, object[], object>> _site;
|
||
|
|
|
||
|
|
internal SplatCallSite(object callable) {
|
||
|
|
Debug.Assert(callable != null);
|
||
|
|
_callable = callable;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal object Invoke(object[] args) {
|
||
|
|
Debug.Assert(args != null);
|
||
|
|
|
||
|
|
// If it is a delegate, just let DynamicInvoke do the binding.
|
||
|
|
var d = _callable as Delegate;
|
||
|
|
if (d != null) {
|
||
|
|
return d.DynamicInvoke(args);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Otherwise, create a CallSite and invoke it.
|
||
|
|
if (_site == null) {
|
||
|
|
_site = CallSite<Func<CallSite, object, object[], object>>.Create(SplatInvokeBinder.Instance);
|
||
|
|
}
|
||
|
|
|
||
|
|
return _site.Target(_site, _callable, args);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|