[primarily a placeholder for now for planning]
This adds invoke capability to function pointers, layering on See also #69273.
This will likely create a new MethodSignature class that will have an Invoke() method, analogous to Delegate.DynamicInvoke(https://docs.microsoft.com/dotnet/api/system.delegate.dynamicinvoke) and MethodBase.Invoke(https://docs.microsoft.com/dotnet/api/system.reflection.methodbase.invoke).
This enable dynamic invoke while supporting the CallConv* types for both existing function pointers and ones created dynamically.
Existing function pointers are be obtained from
typeof(SomeFunctionPointer)Type.GetType() if Type is a function pointerFieldInfo.GetMethodSignature()- The GetMethodSignature() methods are new and only work if the field\property\parameter is a function pointer.
PropertyInfo.GetMethodSignature()ParameterInfo.GetMethodSignature()
A MethodSignature can be created dynamically:
MethodSignaturesig=new(returnParameter:newMethodSignatureParameter(typeof(bool)),parameters:newMethodSignatureParameter[]{newMethodSignatureParameter(typeof(int))},callingConventions=newType[]{typeof(CallConv.Cdecl)});The Invoke() takes the function pointer as an IntPtr or void* along with the parameter values:
note that the sample below uses object-based parameters, but is expected to use strongly-typed
TypedReference and collections once that is available to avoid unnecessary allocations and to support by-ref-like types`:
delegate*<int,bool>fn=&MyFunctionPointer;objectretValue=sig.Invoke(fn,newobject[]{42});
[primarily a placeholder for now for planning]
This adds invoke capability to function pointers, layering on See also #69273.
This will likely create a new
MethodSignatureclass that will have anInvoke()method, analogous to Delegate.DynamicInvoke(https://docs.microsoft.com/dotnet/api/system.delegate.dynamicinvoke) and MethodBase.Invoke(https://docs.microsoft.com/dotnet/api/system.reflection.methodbase.invoke).This enable dynamic invoke while supporting the
CallConv*types for both existing function pointers and ones created dynamically.Existing function pointers are be obtained from
typeof(SomeFunctionPointer)Type.GetType()ifTypeis a function pointerFieldInfo.GetMethodSignature()PropertyInfo.GetMethodSignature()ParameterInfo.GetMethodSignature()A
MethodSignaturecan be created dynamically:The
Invoke()takes the function pointer as anIntPtrorvoid*along with the parameter values:note that the sample below uses
object-based parameters, but is expected to use strongly-typedTypedReferenceand collections once that is available to avoid unnecessary allocations and to support by-ref-like types`: