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authorStefan Hajnoczi <stefanha@linux.vnet.ibm.com>2012-01-18 14:40:40 +0000
committerKevin Wolf <kwolf@redhat.com>2012-01-26 11:45:26 +0100
commit7e6246670add62116729bd93811e41eb60f66b77 (patch)
tree725e2f597f9c646f12517256bb6852bb3c51f69e /qemu-coroutine-sleep.c
parent031380d8770d2df6c386e4aeabd412007d3ebd54 (diff)
coroutine: add co_sleep_ns() coroutine sleep function
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-coroutine-sleep.c')
-rw-r--r--qemu-coroutine-sleep.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/qemu-coroutine-sleep.c b/qemu-coroutine-sleep.c
new file mode 100644
index 000000000..fd6527444
--- /dev/null
+++ b/qemu-coroutine-sleep.c
@@ -0,0 +1,38 @@
+/*
+ * 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();
+}