MAINTAINERS: add section for QEMU Guest Agent
[qemu.git] / qemu-coroutine-sleep.c
1 /*
2 * QEMU coroutine sleep
3 *
4 * Copyright IBM, Corp. 2011
5 *
6 * Authors:
7 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
10 * See the COPYING.LIB file in the top-level directory.
11 *
12 */
13
14 #include "block/coroutine.h"
15 #include "qemu/timer.h"
16 #include "block/aio.h"
17
18 typedef struct CoSleepCB {
19 QEMUTimer *ts;
20 Coroutine *co;
21 } CoSleepCB;
22
23 static void co_sleep_cb(void *opaque)
24 {
25 CoSleepCB *sleep_cb = opaque;
26
27 qemu_coroutine_enter(sleep_cb->co, NULL);
28 }
29
30 void coroutine_fn co_aio_sleep_ns(AioContext *ctx, QEMUClockType type,
31 int64_t ns)
32 {
33 CoSleepCB sleep_cb = {
34 .co = qemu_coroutine_self(),
35 };
36 sleep_cb.ts = aio_timer_new(ctx, type, SCALE_NS, co_sleep_cb, &sleep_cb);
37 timer_mod(sleep_cb.ts, qemu_clock_get_ns(type) + ns);
38 qemu_coroutine_yield();
39 timer_del(sleep_cb.ts);
40 timer_free(sleep_cb.ts);
41 }