[libvirt PATCH v3 4/9] virobject: Introduce virObjectLockGuard
Typical usage:
void foobar(virObjectLockable *obj)
{
VIR_LOCK_GUARD lock = virObjectLockGuard(obj);
/* `obj` is locked, and released automatically on scope exit */
...
}
Signed-off-by: Tim Wiederhake <twiederh(a)redhat.com>
---
src/libvirt_private.syms | 1 +
src/util/virobject.c | 16 ++++++++++++++++
src/util/virobject.h | 4 ++++
3 files changed, 21 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index f41674781d..733e40384e 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2947,6 +2947,7 @@ virObjectListFree;
virObjectListFreeCount;
virObjectLock;
virObjectLockableNew;
+virObjectLockGuard;
virObjectNew;
virObjectRef;
virObjectRWLockableNew;
diff --git a/src/util/virobject.c b/src/util/virobject.c
index 3412985b79..4812b79d56 100644
--- a/src/util/virobject.c
+++ b/src/util/virobject.c
@@ -426,6 +426,22 @@ virObjectGetRWLockableObj(void *anyobj)
}
+/**
+ * virObjectLockGuard:
+ * @anyobj: any instance of virObjectLockable
+ *
+ * Acquire a lock on @anyobj that will be managed by the virLockGuard object
+ * returned to the caller.
+ */
+virLockGuard *
+virObjectLockGuard(void *anyobj)
+{
+ virObjectLockable *obj = virObjectGetLockableObj(anyobj);
+
+ return virLockGuardNew(&obj->lock);
+}
+
+
/**
* virObjectLock:
* @anyobj: any instance of virObjectLockable
diff --git a/src/util/virobject.h b/src/util/virobject.h
index 1e34c77744..0c9cbea726 100644
--- a/src/util/virobject.h
+++ b/src/util/virobject.h
@@ -118,6 +118,10 @@ void *
virObjectRWLockableNew(virClass *klass)
ATTRIBUTE_NONNULL(1);
+virLockGuard *
+virObjectLockGuard(void *lockableobj)
+ ATTRIBUTE_NONNULL(1);
+
void
virObjectLock(void *lockableobj)
ATTRIBUTE_NONNULL(1);
--
2.31.1