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coroutine: add co_sleep_ns() coroutine sleep function

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Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2012-01-18 14:40:40 +00:00 • committed by Kevin Wolf
parent 031380d877
commit 7e6246670a
3 changed files with 48 additions and 0 deletions
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38
qemu-coroutine-sleep.c Normal file
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/*
* 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_free_timer(sleep_cb->ts);
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();
}