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[Qemu-devel] [PATCH 1/8] coroutine: add co_sleep_ns() coroutine sleep fu
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH 1/8] coroutine: add co_sleep_ns() coroutine sleep function |
Date: |
Thu, 27 Oct 2011 16:22:48 +0100 |
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
Makefile.objs | 2 +-
qemu-coroutine-sleep.c | 38 ++++++++++++++++++++++++++++++++++++++
qemu-coroutine.h | 6 ++++++
3 files changed, 45 insertions(+), 1 deletions(-)
create mode 100644 qemu-coroutine-sleep.c
diff --git a/Makefile.objs b/Makefile.objs
index 01587c8..c290fd3 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -12,7 +12,7 @@ oslib-obj-$(CONFIG_POSIX) += oslib-posix.o qemu-thread-posix.o
#######################################################################
# coroutines
-coroutine-obj-y = qemu-coroutine.o qemu-coroutine-lock.o
+coroutine-obj-y = qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-sleep.o
ifeq ($(CONFIG_UCONTEXT_COROUTINE),y)
coroutine-obj-$(CONFIG_POSIX) += coroutine-ucontext.o
else
diff --git a/qemu-coroutine-sleep.c b/qemu-coroutine-sleep.c
new file mode 100644
index 0000000..fd65274
--- /dev/null
+++ b/qemu-coroutine-sleep.c
@@ -0,0 +1,38 @@
+/*
+ * QEMU coroutine sleep
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ * Stefan Hajnoczi <address@hidden>
+ *
+ * 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();
+}
diff --git a/qemu-coroutine.h b/qemu-coroutine.h
index b8fc4f4..e824327 100644
--- a/qemu-coroutine.h
+++ b/qemu-coroutine.h
@@ -17,6 +17,7 @@
#include <stdbool.h>
#include "qemu-queue.h"
+#include "qemu-timer.h"
/**
* Coroutines are a mechanism for stack switching and can be used for
@@ -188,4 +189,9 @@ void qemu_co_rwlock_wrlock(CoRwlock *lock);
*/
void qemu_co_rwlock_unlock(CoRwlock *lock);
+/**
+ * Yield the coroutine for a given duration
+ */
+void coroutine_fn co_sleep_ns(QEMUClock *clock, int64_t ns);
+
#endif /* QEMU_COROUTINE_H */
--
1.7.7
- [Qemu-devel] [PATCH 0/8] block: generic image streaming, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 7/8] qmp: add query-block-jobs, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 8/8] test: add image streaming test cases, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 2/8] block: add BlockJob interface for long-running operations, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 4/8] qmp: add block_stream command, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 6/8] qmp: add block_job_cancel command, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 1/8] coroutine: add co_sleep_ns() coroutine sleep function,
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH 5/8] qmp: add block_job_set_speed command, Stefan Hajnoczi, 2011/10/27
- [Qemu-devel] [PATCH 3/8] block: add image streaming block job, Stefan Hajnoczi, 2011/10/27
- Re: [Qemu-devel] [PATCH 0/8] block: generic image streaming, Luiz Capitulino, 2011/10/27