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io: io_always, and zero-length operations support.
authorRusty Russell <rusty@rustcorp.com.au>
Sat, 7 Dec 2013 07:10:47 +0000 (17:40 +1030)
committerRusty Russell <rusty@rustcorp.com.au>
Sat, 7 Dec 2013 07:11:44 +0000 (17:41 +1030)
A zero-length read should complete immediately, even if the fd isn't readable.
Wire this up, and expose it for callers to use.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

No differences found
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