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authorPaolo Bonzini <pbonzini@redhat.com>2016-10-27 12:48:59 +0200
committerFam Zheng <famz@redhat.com>2016-10-28 21:50:18 +0800
commite437016511edb0dfa13cc98587c39590eaa2609a (patch)
treeacf1b17ca024a06b3f7d7c2fde5f2a56fcdace47 /include
parentf11672dbc0207cfb0015a2d08e7693b957847cbe (diff)
aio: introduce qemu_get_current_aio_context
This will be used by BDRV_POLL_WHILE (and thus by bdrv_drain) to choose how to wait for I/O completion. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1477565348-5458-12-git-send-email-pbonzini@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/block/aio.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/block/aio.h b/include/block/aio.h
index b9fe2cb37e..040b3b181e 100644
--- a/include/block/aio.h
+++ b/include/block/aio.h
@@ -453,6 +453,24 @@ static inline bool aio_node_check(AioContext *ctx, bool is_external)
}
/**
+ * Return the AioContext whose event loop runs in the current thread.
+ *
+ * If called from an IOThread this will be the IOThread's AioContext. If
+ * called from another thread it will be the main loop AioContext.
+ */
+AioContext *qemu_get_current_aio_context(void);
+
+/**
+ * @ctx: the aio context
+ *
+ * Return whether we are running in the I/O thread that manages @ctx.
+ */
+static inline bool aio_context_in_iothread(AioContext *ctx)
+{
+ return ctx == qemu_get_current_aio_context();
+}
+
+/**
* aio_context_setup:
* @ctx: the aio context
*