diff options
Diffstat (limited to 'debian/grub-extras/disabled/gpxe/src/include/gpxe/filter.h')
-rw-r--r-- | debian/grub-extras/disabled/gpxe/src/include/gpxe/filter.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/debian/grub-extras/disabled/gpxe/src/include/gpxe/filter.h b/debian/grub-extras/disabled/gpxe/src/include/gpxe/filter.h new file mode 100644 index 0000000..1f59fcc --- /dev/null +++ b/debian/grub-extras/disabled/gpxe/src/include/gpxe/filter.h @@ -0,0 +1,75 @@ +#ifndef _GPXE_FILTER_H +#define _GPXE_FILTER_H + +/** @file + * + * Data transfer filters + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stddef.h> +#include <gpxe/xfer.h> + +/** + * Half of a data transfer filter + * + * Embed two of these structures within a structure implementing a + * data transfer filter, and intialise with filter_init(). You can + * then use the filter_xxx() methods as the data transfer interface + * methods as required. + */ +struct xfer_filter_half { + /** Data transfer interface */ + struct xfer_interface xfer; + /** Other half of the data transfer filter */ + struct xfer_filter_half *other; +}; + +/** + * Get data transfer interface for the other half of a data transfer filter + * + * @v xfer Data transfer interface + * @ret other Other half's data transfer interface + */ +static inline __attribute__ (( always_inline )) struct xfer_interface * +filter_other_half ( struct xfer_interface *xfer ) { + struct xfer_filter_half *half = + container_of ( xfer, struct xfer_filter_half, xfer ); + return &half->other->xfer; +} + +extern void filter_close ( struct xfer_interface *xfer, int rc ); +extern int filter_vredirect ( struct xfer_interface *xfer, int type, + va_list args ); +extern size_t filter_window ( struct xfer_interface *xfer ); +extern struct io_buffer * filter_alloc_iob ( struct xfer_interface *xfer, + size_t len ); +extern int filter_deliver_iob ( struct xfer_interface *xfer, + struct io_buffer *iobuf, + struct xfer_metadata *meta ); +extern int filter_deliver_raw ( struct xfer_interface *xfer, const void *data, + size_t len ); + +/** + * Initialise a data transfer filter + * + * @v left "Left" half of the filter + * @v left_op Data transfer interface operations for "left" half + * @v right "Right" half of the filter + * @v right_op Data transfer interface operations for "right" half + * @v refcnt Containing object reference counter, or NULL + */ +static inline void filter_init ( struct xfer_filter_half *left, + struct xfer_interface_operations *left_op, + struct xfer_filter_half *right, + struct xfer_interface_operations *right_op, + struct refcnt *refcnt ) { + xfer_init ( &left->xfer, left_op, refcnt ); + xfer_init ( &right->xfer, right_op, refcnt ); + left->other = right; + right->other = left; +} + +#endif /* _GPXE_FILTER_H */ |