[libvirt PATCH v4 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&gt; --- 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 4cfe6c17eb..463bb39de3 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2944,6 +2944,7 @@ virObjectListFree; virObjectListFreeCount; virObjectLock; virObjectLockableNew; +virObjectLockGuard; virObjectNew; virObjectRef; virObjectRWLockableNew; diff --git a/src/util/virobject.c b/src/util/virobject.c index 588b41802c..74cc84205e 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 virLockGuardLock(&obj->lock); +} + + /** * virObjectLock: * @anyobj: any instance of virObjectLockable diff --git a/src/util/virobject.h b/src/util/virobject.h index 1e34c77744..dc1ce66a4f 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