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 "qemu/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 } 42