Commit 8865852e authored by Fam Zheng's avatar Fam Zheng
Browse files

async: Introduce aio_co_enter 



They start the coroutine on the specified context.

Signed-off-by: default avatarFam Zheng <famz@redhat.com>
Acked-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: default avatarKevin Wolf <kwolf@redhat.com>
parent ba9e75ce

include/block/aio.h

+9 −0
Original line number Diff line number Diff line
@@ -510,6 +510,15 @@ void aio_co_schedule(AioContext *ctx, struct Coroutine *co); 
 */

void aio_co_wake(struct Coroutine *co);



/**

 * aio_co_enter:

 * @ctx: the context to run the coroutine

 * @co: the coroutine to run

 *

 * Enter a coroutine in the specified AioContext.

 */

void aio_co_enter(AioContext *ctx, struct Coroutine *co);



/**

 * Return the AioContext whose event loop runs in the current thread.

 *

util/async.c

+6 −1
Original line number Diff line number Diff line
@@ -453,6 +453,11 @@ void aio_co_wake(struct Coroutine *co) 
    smp_read_barrier_depends();

    ctx = atomic_read(&co->ctx);



    aio_co_enter(ctx, co);

}



void aio_co_enter(AioContext *ctx, struct Coroutine *co)

{

    if (ctx != qemu_get_current_aio_context()) {

        aio_co_schedule(ctx, co);

        return;
@@ -464,7 +469,7 @@ void aio_co_wake(struct Coroutine *co) 
        QSIMPLEQ_INSERT_TAIL(&self->co_queue_wakeup, co, co_queue_next);

    } else {

        aio_context_acquire(ctx);

        qemu_coroutine_enter(co);

        qemu_aio_coroutine_enter(ctx, co);

        aio_context_release(ctx);

    }

}