79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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#ifndef _GPXE_XFER_H
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#define _GPXE_XFER_H
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/** @file
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*
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* Data transfer interfaces
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*
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*/
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#include <stddef.h>
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#include <gpxe/interface.h>
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#include <gpxe/iobuf.h>
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struct xfer_interface;
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/** Data transfer interface operations */
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struct xfer_interface_operations {
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/** Deliver datagram
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*
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* @v xfer Data-transfer interface
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* @v src Source interface
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* @v iobuf Datagram I/O buffer
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* @ret rc Return status code
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*/
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int ( * deliver ) ( struct xfer_interface *xfer,
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struct xfer_interface *src,
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struct io_buffer *iobuf );
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};
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/** A data transfer interface */
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struct xfer_interface {
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/** Generic object communication interface */
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struct interface intf;
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/** Operations for received messages */
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struct xfer_interface_operations *op;
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};
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extern struct xfer_interface null_xfer;
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extern struct xfer_interface_operations null_xfer_ops;
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static inline struct xfer_interface *
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xfer_dest ( struct xfer_interface *xfer ) {
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return container_of ( xfer->intf.dest, struct xfer_interface, intf );
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}
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/**
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* Plug a data-transfer interface into a new destination interface
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*
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* @v xfer Data-transfer interface
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* @v dest New destination interface
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*/
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static inline void xfer_plug ( struct xfer_interface *xfer,
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struct xfer_interface *dest ) {
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plug ( &xfer->intf, &dest->intf );
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}
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/**
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* Unplug a data-transfer interface
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*
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* @v xfer Data-transfer interface
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*/
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static inline void xfer_unplug ( struct xfer_interface *xfer ) {
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plug ( &xfer->intf, &null_xfer.intf );
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}
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/**
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* Terminate a data-transfer interface
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*
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* @v xfer Data-transfer interface
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*
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* After calling this method, no further messages will be received via
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* the interface.
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*/
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static inline void xfer_terminate ( struct xfer_interface *xfer ) {
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xfer->op = &null_xfer_ops;
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};
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#endif /* _GPXE_XFER_H */
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