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-rw-r--r--contrib/qemu/qemu-coroutine-sleep.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/contrib/qemu/qemu-coroutine-sleep.c b/contrib/qemu/qemu-coroutine-sleep.c
new file mode 100644
index 00000000000..169ce5ccc92
--- /dev/null
+++ b/contrib/qemu/qemu-coroutine-sleep.c
@@ -0,0 +1,39 @@
+/*
+ * 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 "block/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);
+}