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[Qemu-devel] [PATCH v5 4/8] coroutine: add co_aio_sleep_ns() to allow sl
From: |
MORITA Kazutaka |
Subject: |
[Qemu-devel] [PATCH v5 4/8] coroutine: add co_aio_sleep_ns() to allow sleep in block drivers |
Date: |
Thu, 24 Oct 2013 16:01:14 +0900 |
This helper function behaves similarly to co_sleep_ns(), but the
sleeping coroutine will be resumed when using qemu_aio_wait().
Signed-off-by: MORITA Kazutaka <address@hidden>
---
include/block/coroutine.h | 9 +++++++++
qemu-coroutine-sleep.c | 14 ++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/include/block/coroutine.h b/include/block/coroutine.h
index 4232569..4d5c0cf 100644
--- a/include/block/coroutine.h
+++ b/include/block/coroutine.h
@@ -216,6 +216,15 @@ void qemu_co_rwlock_unlock(CoRwlock *lock);
void coroutine_fn co_sleep_ns(QEMUClockType type, int64_t ns);
/**
+ * Yield the coroutine for a given duration
+ *
+ * Behaves similarly to co_sleep_ns(), but the sleeping coroutine will be
+ * resumed when using qemu_aio_wait().
+ */
+void coroutine_fn co_aio_sleep_ns(AioContext *ctx, QEMUClockType type,
+ int64_t ns);
+
+/**
* Yield until a file descriptor becomes readable
*
* Note that this function clobbers the handlers for the file descriptor.
diff --git a/qemu-coroutine-sleep.c b/qemu-coroutine-sleep.c
index f6db978..ad78fba 100644
--- a/qemu-coroutine-sleep.c
+++ b/qemu-coroutine-sleep.c
@@ -13,6 +13,7 @@
#include "block/coroutine.h"
#include "qemu/timer.h"
+#include "block/aio.h"
typedef struct CoSleepCB {
QEMUTimer *ts;
@@ -37,3 +38,16 @@ void coroutine_fn co_sleep_ns(QEMUClockType type, int64_t ns)
timer_del(sleep_cb.ts);
timer_free(sleep_cb.ts);
}
+
+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);
+}
--
1.7.10.4
- [Qemu-devel] [PATCH v5 0/8] sheepdog: reconnect server after connection failure, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 5/8] sheepdog: try to reconnect to sheepdog after network error, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 3/8] sheepdog: reload inode outside of resend_aioreq, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 6/8] sheepdog: make add_aio_request and send_aioreq void functions, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 1/8] sheepdog: check return values of qemu_co_recv/send correctly, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 7/8] sheepdog: cancel aio requests if possible, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 8/8] sheepdog: check simultaneous create in resend_aioreq, MORITA Kazutaka, 2013/10/24
- [Qemu-devel] [PATCH v5 4/8] coroutine: add co_aio_sleep_ns() to allow sleep in block drivers,
MORITA Kazutaka <=
- [Qemu-devel] [PATCH v5 2/8] sheepdog: handle vdi objects in resend_aio_req, MORITA Kazutaka, 2013/10/24
- Re: [Qemu-devel] [PATCH v5 0/8] sheepdog: reconnect server after connection failure, Liu Yuan, 2013/10/28