Delegate describing a low-level MPI function that takes care of de-allocating an attribute when it is deleted from a communicator (or the communicator itself is freed).

Namespace:  MPI
Assembly:  MPI (in MPI.dll)
Version: 1.0.0.0 (1.0.0.0)

Syntax

C#
public delegate int MPI_Delete_function(
	int comm,
	int keyval,
	IntPtr attribute_val,
	IntPtr extra_state
)
Visual Basic (Declaration)
Public Delegate Function MPI_Delete_function ( _
	comm As Integer, _
	keyval As Integer, _
	attribute_val As IntPtr, _
	extra_state As IntPtr _
) As Integer
Visual C++
public delegate int MPI_Delete_function(
	int comm, 
	int keyval, 
	IntPtr attribute_val, 
	IntPtr extra_state
)

Parameters

comm
Type: System..::.Int32
The communicator.
keyval
Type: System..::.Int32
The attribute being removed from the communicator.
attribute_val
Type: System..::.IntPtr
The value of this attribute in the communicator.
extra_state
Type: System..::.IntPtr
The extra state provided by the user in MPI_Keyval_create(Unsafe..::.MPI_Copy_function, Unsafe..::.MPI_Delete_function, Int32%, IntPtr).

Remarks

Often used when the attribute's value is a pointer to some per-communicator data, and the pointer needs to be freed. This function will be defined automatically by MPI.NET when a new Attribute is created, and will vary depending on the type of the attribute and on the requested AttributeDuplication.

See Also