Commit 85956859 authored by Vladimir Sementsov-Ogievskiy's avatar Vladimir Sementsov-Ogievskiy Committed by Stefan Hajnoczi
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qemu-coroutine-sleep: drop CoSleepCB 



Drop CoSleepCB structure. It's actually unused.

Signed-off-by: default avatarVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190122143113.20331-1-vsementsov@virtuozzo.com
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 202277f4

util/qemu-coroutine-sleep.c

+10 −17
Original line number Diff line number Diff line
@@ -17,38 +17,31 @@ 
#include "qemu/timer.h"

#include "block/aio.h"



typedef struct CoSleepCB {

    QEMUTimer *ts;

    Coroutine *co;

} CoSleepCB;



static void co_sleep_cb(void *opaque)

{

    CoSleepCB *sleep_cb = opaque;

    Coroutine *co = opaque;



    /* Write of schedule protected by barrier write in aio_co_schedule */

    atomic_set(&sleep_cb->co->scheduled, NULL);

    aio_co_wake(sleep_cb->co);

    atomic_set(&co->scheduled, NULL);

    aio_co_wake(co);

}



void coroutine_fn qemu_co_sleep_ns(QEMUClockType type, int64_t ns)

{

    AioContext *ctx = qemu_get_current_aio_context();

    CoSleepCB sleep_cb = {

        .co = qemu_coroutine_self(),

    };

    QEMUTimer *ts;

    Coroutine *co = qemu_coroutine_self();



    const char *scheduled = atomic_cmpxchg(&sleep_cb.co->scheduled, NULL,

                                           __func__);

    const char *scheduled = atomic_cmpxchg(&co->scheduled, NULL, __func__);

    if (scheduled) {

        fprintf(stderr,

                "%s: Co-routine was already scheduled in '%s'\n",

                __func__, scheduled);

        abort();

    }

    sleep_cb.ts = aio_timer_new(ctx, type, SCALE_NS, co_sleep_cb, &sleep_cb);

    timer_mod(sleep_cb.ts, qemu_clock_get_ns(type) + ns);

    ts = aio_timer_new(ctx, type, SCALE_NS, co_sleep_cb, co);

    timer_mod(ts, qemu_clock_get_ns(type) + ns);

    qemu_coroutine_yield();

    timer_del(sleep_cb.ts);

    timer_free(sleep_cb.ts);

    timer_del(ts);

    timer_free(ts);

}