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util/async: Add aio_co_reschedule_self()

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Add a function that can be used to move the currently running coroutine
to a different AioContext (and therefore potentially a different
thread).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20201005155855.256490-12-kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Kevin Wolf 2020-10-05 17:58:52 +02:00 • committed by Markus Armbruster
parent bb4b9ead95
commit 26b0b698c0
2 changed files with 40 additions and 0 deletions
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10
include/block/aio.h
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@ -17,6 +17,7 @@
#ifdef CONFIG_LINUX_IO_URING
#include <liburing.h>
#endif
#include "qemu/coroutine.h"
#include "qemu/queue.h"
#include "qemu/event_notifier.h"
#include "qemu/thread.h"
@ -654,6 +655,15 @@ static inline bool aio_node_check(AioContext *ctx, bool is_external)
*/
void aio_co_schedule(AioContext *ctx, struct Coroutine *co);
/**
* aio_co_reschedule_self:
* @new_ctx: the new context
*
* Move the currently running coroutine to new_ctx. If the coroutine is already
* running in new_ctx, do nothing.
*/
void coroutine_fn aio_co_reschedule_self(AioContext *new_ctx);
/**
* aio_co_wake:
* @co: the coroutine