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[xfer] Add xfer_window_changed()

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xfer_window_changed() can be used to notify peers that an interface is
now ready to accept data.  This can potentially be used to eliminate
the need for wasteful processes that simply poll xfer_window() until
the window becomes non-zero.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-09-05 01:16:29 +01:00
parent 35b19d8848
commit c8199aacaa
2 changed files with 31 additions and 0 deletions
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4
src/include/ipxe/xfer.h
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@@ -57,6 +57,10 @@ extern size_t xfer_window ( struct interface *intf );
#define xfer_window_TYPE( object_type ) \
typeof ( size_t ( object_type ) )
extern void xfer_window_changed ( struct interface *intf );
#define xfer_window_changed_TYPE( object_type ) \
typeof ( void ( object_type ) )
extern struct io_buffer * xfer_alloc_iob ( struct interface *intf,
size_t len );
#define xfer_alloc_iob_TYPE( object_type ) \