File:  [Qemu by Fabrice Bellard] / qemu / qemu-coroutine-sleep.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 19:35:21 2018 UTC (12 months, 3 weeks ago) by root
Branches: qemu, MAIN
CVS tags: qemu1101, HEAD
qemu 1.1.1

/*
 * QEMU coroutine sleep
 *
 * Copyright IBM, Corp. 2011
 *
 * Authors:
 *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
 *
 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
 * See the COPYING.LIB file in the top-level directory.
 *
 */

#include "qemu-coroutine.h"
#include "qemu-timer.h"

typedef struct CoSleepCB {
    QEMUTimer *ts;
    Coroutine *co;
} CoSleepCB;

static void co_sleep_cb(void *opaque)
{
    CoSleepCB *sleep_cb = opaque;

    qemu_coroutine_enter(sleep_cb->co, NULL);
}

void coroutine_fn co_sleep_ns(QEMUClock *clock, int64_t ns)
{
    CoSleepCB sleep_cb = {
        .co = qemu_coroutine_self(),
    };
    sleep_cb.ts = qemu_new_timer(clock, SCALE_NS, co_sleep_cb, &sleep_cb);
    qemu_mod_timer(sleep_cb.ts, qemu_get_clock_ns(clock) + ns);
    qemu_coroutine_yield();
    qemu_del_timer(sleep_cb.ts);
    qemu_free_timer(sleep_cb.ts);
}

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