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[Qemu-devel] [RFC v4 15/27] monitor: let monitor_{suspend|resume} thread
From: |
Peter Xu |
Subject: |
[Qemu-devel] [RFC v4 15/27] monitor: let monitor_{suspend|resume} thread safe |
Date: |
Thu, 16 Nov 2017 21:05:58 +0800 |
Monitor code now can be run in more than one thread. Let the suspend
and resume code be thread safe.
Reviewed-by: Fam Zheng <address@hidden>
Signed-off-by: Peter Xu <address@hidden>
---
monitor.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/monitor.c b/monitor.c
index ec03f1b232..30f9cd80de 100644
--- a/monitor.c
+++ b/monitor.c
@@ -4003,7 +4003,7 @@ int monitor_suspend(Monitor *mon)
{
if (!mon->rs)
return -ENOTTY;
- mon->suspend_cnt++;
+ atomic_inc(&mon->suspend_cnt);
return 0;
}
@@ -4011,8 +4011,9 @@ void monitor_resume(Monitor *mon)
{
if (!mon->rs)
return;
- if (--mon->suspend_cnt == 0)
+ if (atomic_dec_fetch(&mon->suspend_cnt) == 0) {
readline_show_prompt(mon->rs);
+ }
}
static QObject *get_qmp_greeting(void)
--
2.13.6
- [Qemu-devel] [RFC v4 10/27] monitor: allow to use IO thread for parsing, (continued)
[Qemu-devel] [RFC v4 11/27] qmp: introduce QMPCapability, Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 13/27] qmp: introduce some capability helpers, Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 12/27] qmp: negociate QMP capabilities, Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 14/27] monitor: introduce monitor_qmp_respond(), Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 15/27] monitor: let monitor_{suspend|resume} thread safe,
Peter Xu <=
[Qemu-devel] [RFC v4 16/27] monitor: separate QMP parser and dispatcher, Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 17/27] qmp: add new event "request-dropped", Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 18/27] monitor: send event when request queue full, Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 19/27] qapi: introduce new cmd option "allow-oob", Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 20/27] qmp: support out-of-band (oob) execution, Peter Xu, 2017/11/16
[Qemu-devel] [RFC v4 21/27] qmp: let migrate-incoming allow out-of-band, Peter Xu, 2017/11/16