* Re: sem_timedwait: The semaphore times out when the clock_REALTIME is used.
[not found] <20210406130933.1915-1-yangyanchao6@huawei.com>
@ 2021-04-06 13:30 ` Adhemerval Zanella
0 siblings, 0 replies; only message in thread
From: Adhemerval Zanella @ 2021-04-06 13:30 UTC (permalink / raw)
To: y00575850, Libc-help; +Cc: carlos, wuxu.wu
On 06/04/2021 10:09, y00575850 via Libc-stable wrote:
> 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.
>
On glibc 2.30 we added the GNU extension sem_clockwait where you can
specify the clock against which the timeout will be measured.
(I moved this conversation it to libc-help, libc-stable is usually for
discussion regarding backporting and issue against older releases).
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