[7/9] iothread: add iothread_by_id() API

Message ID 20171205104141.28882-8-stefanha@redhat.com
State New
Headers show
Series
  • blockdev: fix QMP 'transaction' with IOThreads
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Commit Message

Stefan Hajnoczi Dec. 5, 2017, 10:41 a.m.
Encapsulate IOThread QOM object lookup so that callers don't need to
know how and where IOThread objects live.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 include/sysemu/iothread.h | 1 +
 iothread.c                | 7 +++++++
 2 files changed, 8 insertions(+)

Patch

diff --git a/include/sysemu/iothread.h b/include/sysemu/iothread.h
index 110329b2b4..55de1715c7 100644
--- a/include/sysemu/iothread.h
+++ b/include/sysemu/iothread.h
@@ -42,6 +42,7 @@  typedef struct {
    OBJECT_CHECK(IOThread, obj, TYPE_IOTHREAD)
 
 char *iothread_get_id(IOThread *iothread);
+IOThread *iothread_by_id(const char *id);
 AioContext *iothread_get_aio_context(IOThread *iothread);
 void iothread_stop_all(void);
 GMainContext *iothread_get_g_main_context(IOThread *iothread);
diff --git a/iothread.c b/iothread.c
index 27a4288578..e7b93e02a3 100644
--- a/iothread.c
+++ b/iothread.c
@@ -380,3 +380,10 @@  void iothread_destroy(IOThread *iothread)
 {
     object_unparent(OBJECT(iothread));
 }
+
+/* Lookup IOThread by its id.  Only finds user-created objects, not internal
+ * iothread_create() objects. */
+IOThread *iothread_by_id(const char *id)
+{
+    return IOTHREAD(object_resolve_path_type(id, TYPE_IOTHREAD, NULL));
+}