char: add IOWatchPoll support
This is a special GSource that supports CharDriverState style poll callbacks. For reviewability and bisectability, this code is #if 0'd out in this patch to avoid unused warnings since all of the functions are static. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Message-id: 9b59ac17b9d0bb3972a73fed04d415f07b391936.1362505276.git.amit.shah@redhat.com Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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