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Corinna Vinschen 7b4f798418 Cygwin: serial: read: if VMIN > 0, wait for VMIN chars in inbound queue
Per termios, read waits for MIN chars even if the number of requested
bytes is less.  This requires to add WaitCommEvent to wait non-busily
for MIN chars prior to calling ReadFile, so, reintroduce it.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-10-14 10:54:15 -04:00
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