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util: add qemu-co-timeout

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Add new API, to make a time limited call of the coroutine.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@openvz.org>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2022-04-07 16:27:23 +03:00 • committed by Vladimir Sementsov-Ogievskiy
parent dd3e97dfbe
commit e1878eb5f0
3 changed files with 103 additions and 0 deletions
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13
include/qemu/coroutine.h
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@ -331,6 +331,19 @@ static inline void coroutine_fn qemu_co_sleep_ns(QEMUClockType type, int64_t ns)
qemu_co_sleep_ns_wakeable(&w, type, ns);
}
typedef void CleanupFunc(void *opaque);
/**
* Run entry in a coroutine and start timer. Wait for entry to finish or for
* timer to elapse, what happen first. If entry finished, return 0, if timer
* elapsed earlier, return -ETIMEDOUT.
*
* Be careful, entry execution is not canceled, user should handle it somehow.
* If @clean is provided, it's called after coroutine finish if timeout
* happened.
*/
int coroutine_fn qemu_co_timeout(CoroutineEntry *entry, void *opaque,
uint64_t timeout_ns, CleanupFunc clean);
/**
* Wake a coroutine if it is sleeping in qemu_co_sleep_ns. The timer will be
* deleted. @sleep_state must be the variable whose address was given to