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From: y00575850 <yangyanchao6@huawei.com>
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CC: <wuxu.wu@huawei.com>, <carlos@systemhalted.org>
Subject: sem_timedwait: The semaphore times out when the clock_REALTIME is
 used.
Date: Tue, 6 Apr 2021 21:09:33 +0800
Message-ID: <20210406130933.1915-1-yangyanchao6@huawei.com>
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	Dear Carlos,
When I use sem_timedwait, a time jump will cause the semaphore to time out. 
While I know that using CLOCK_REALTIME is POSIX-defined behavior, it doesn't 
fit the actual meaning of this function.To solve this problem, modify the 
sem_timedwait process, for example: add a switch control. 
Or add an interface that uses the Clock_MONOTONIC interface.

Best regards,
Yanchao