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authorDaniel P. Berrange <berrange@redhat.com>2015-09-01 14:48:02 +0100
committerDaniel P. Berrange <berrange@redhat.com>2015-10-20 14:59:04 +0100
commit10817bf09d5f8cb22711fb0ee8d8da49f6f05f89 (patch)
tree735f6b70cedecd57843b9108cb68e2359e147e0c /util/qemu-coroutine-sleep.c
parent57cb38b3833c5215131b983f181b26d6ba9b8d35 (diff)
coroutine: move into libqemuutil.a library
The coroutine files are currently referenced by the block-obj-y variable. The coroutine functionality though is already used by more than just the block code. eg migration code uses coroutine yield. In the future the I/O channel code will also use the coroutine yield functionality. Since the coroutine code is nicely self-contained it can be easily built as part of the libqemuutil.a library, making it widely available. The headers are also moved into include/qemu, instead of the include/block directory, since they are now part of the util codebase, and the impl was never in the block/ directory either. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Diffstat (limited to 'util/qemu-coroutine-sleep.c')
-rw-r--r--util/qemu-coroutine-sleep.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/util/qemu-coroutine-sleep.c b/util/qemu-coroutine-sleep.c
new file mode 100644
index 0000000000..b35db56356
--- /dev/null
+++ b/util/qemu-coroutine-sleep.c
@@ -0,0 +1,41 @@
+/*
+ * 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"
+#include "block/aio.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_aio_sleep_ns(AioContext *ctx, QEMUClockType type,
+ int64_t ns)
+{
+ CoSleepCB sleep_cb = {
+ .co = qemu_coroutine_self(),
+ };
+ sleep_cb.ts = aio_timer_new(ctx, type, SCALE_NS, co_sleep_cb, &sleep_cb);
+ timer_mod(sleep_cb.ts, qemu_clock_get_ns(type) + ns);
+ qemu_coroutine_yield();
+ timer_del(sleep_cb.ts);
+ timer_free(sleep_cb.ts);
+}