class twisted.protocols.amp._DescriptorExchanger: (source)
Known subclasses: twisted.protocols.amp.BinaryBoxProtocol
Implements interfaces: twisted.internet.interfaces.IFileDescriptorReceiver
_DescriptorExchanger is a mixin for BinaryBoxProtocol which adds support for receiving file descriptors, a feature offered by IUNIXTransport.
| Method | __init__ | Undocumented |
| Method | fileDescriptorReceived | Collect received file descriptors to be claimed later by Descriptor. |
| Instance Variable | _descriptors | Temporary storage for all file descriptors received. Values in this dictionary are the file descriptors (as integers). Keys in this dictionary are ordinals giving the order in which each descriptor was received. The ordering information is used to allow Descriptor to determine which is the correct descriptor for any particular usage of that argument type. |
| Instance Variable | _sendingDescriptorCounter | A no-argument callable which returns the ordinals, starting from 0. This is used to construct values for _sendFileDescriptor. |
| Instance Variable | _receivingDescriptorCounter | A no-argument callable which returns the ordinals, starting from 0. This is used to construct values for fileDescriptorReceived. |
| Instance Variable | _getDescriptor | Undocumented |
| Method | _sendFileDescriptor | Assign and return the next ordinal to the given descriptor after sending the descriptor over this protocol's transport. |
Descriptor to determine which is the correct descriptor for any particular usage of that argument type.dict)
_sendFileDescriptor.fileDescriptorReceived.Assign and return the next ordinal to the given descriptor after sending the descriptor over this protocol's transport.
Collect received file descriptors to be claimed later by Descriptor.
| Parameters | descriptor | The received file descriptor. (type: int) |