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util: Introduce and use virObjectRWUnlock
Rather than overload virObjectUnlock as commit id '77f4593b' has done, create a separate virObjectRWUnlock API that will force the consumers to make the proper decision regarding unlocking the RWLock's. Similar to the RWLockRead and RWLockWrite, use the virObjectGetRWLockableObj helper. This restores the virObjectUnlock code to using the virObjectGetLockableObj. Signed-off-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
parent
bf09f002b1
commit
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@ -122,7 +122,7 @@ virDomainObjListFindByIDInternal(virDomainObjListPtr doms,
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obj = virHashSearch(doms->objs, virDomainObjListSearchID, &id, NULL);
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obj = virHashSearch(doms->objs, virDomainObjListSearchID, &id, NULL);
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if (ref) {
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if (ref) {
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virObjectRef(obj);
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virObjectRef(obj);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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}
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}
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if (obj) {
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if (obj) {
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virObjectLock(obj);
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virObjectLock(obj);
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@ -134,7 +134,7 @@ virDomainObjListFindByIDInternal(virDomainObjListPtr doms,
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}
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}
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}
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}
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if (!ref)
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if (!ref)
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return obj;
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return obj;
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}
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}
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@ -166,7 +166,7 @@ virDomainObjListFindByUUIDInternal(virDomainObjListPtr doms,
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obj = virHashLookup(doms->objs, uuidstr);
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obj = virHashLookup(doms->objs, uuidstr);
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if (ref) {
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if (ref) {
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virObjectRef(obj);
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virObjectRef(obj);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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}
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}
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if (obj) {
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if (obj) {
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virObjectLock(obj);
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virObjectLock(obj);
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@ -178,7 +178,7 @@ virDomainObjListFindByUUIDInternal(virDomainObjListPtr doms,
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}
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}
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}
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}
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if (!ref)
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if (!ref)
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return obj;
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return obj;
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}
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}
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@ -207,7 +207,7 @@ virDomainObjPtr virDomainObjListFindByName(virDomainObjListPtr doms,
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virObjectRWLockRead(doms);
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virObjectRWLockRead(doms);
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obj = virHashLookup(doms->objsName, name);
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obj = virHashLookup(doms->objsName, name);
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virObjectRef(obj);
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virObjectRef(obj);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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if (obj) {
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if (obj) {
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virObjectLock(obj);
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virObjectLock(obj);
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if (obj->removing) {
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if (obj->removing) {
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@ -329,7 +329,7 @@ virDomainObjPtr virDomainObjListAdd(virDomainObjListPtr doms,
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virObjectRWLockWrite(doms);
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virObjectRWLockWrite(doms);
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ret = virDomainObjListAddLocked(doms, def, xmlopt, flags, oldDef);
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ret = virDomainObjListAddLocked(doms, def, xmlopt, flags, oldDef);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return ret;
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return ret;
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}
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}
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@ -355,7 +355,7 @@ void virDomainObjListRemove(virDomainObjListPtr doms,
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virHashRemoveEntry(doms->objsName, dom->def->name);
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virHashRemoveEntry(doms->objsName, dom->def->name);
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virObjectUnlock(dom);
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virObjectUnlock(dom);
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virObjectUnref(dom);
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virObjectUnref(dom);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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}
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}
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@ -420,7 +420,7 @@ virDomainObjListRename(virDomainObjListPtr doms,
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ret = 0;
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ret = 0;
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cleanup:
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cleanup:
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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VIR_FREE(old_name);
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VIR_FREE(old_name);
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return ret;
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return ret;
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}
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}
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@ -609,7 +609,7 @@ virDomainObjListLoadAllConfigs(virDomainObjListPtr doms,
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}
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}
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VIR_DIR_CLOSE(dir);
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VIR_DIR_CLOSE(dir);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return ret;
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return ret;
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}
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}
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@ -655,7 +655,7 @@ virDomainObjListNumOfDomains(virDomainObjListPtr doms,
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struct virDomainObjListData data = { filter, conn, active, 0 };
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struct virDomainObjListData data = { filter, conn, active, 0 };
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virObjectRWLockRead(doms);
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virObjectRWLockRead(doms);
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virHashForEach(doms->objs, virDomainObjListCount, &data);
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virHashForEach(doms->objs, virDomainObjListCount, &data);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return data.count;
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return data.count;
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}
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}
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@ -699,7 +699,7 @@ virDomainObjListGetActiveIDs(virDomainObjListPtr doms,
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0, maxids, ids };
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0, maxids, ids };
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virObjectRWLockRead(doms);
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virObjectRWLockRead(doms);
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virHashForEach(doms->objs, virDomainObjListCopyActiveIDs, &data);
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virHashForEach(doms->objs, virDomainObjListCopyActiveIDs, &data);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return data.numids;
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return data.numids;
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}
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}
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@ -753,7 +753,7 @@ virDomainObjListGetInactiveNames(virDomainObjListPtr doms,
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size_t i;
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size_t i;
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virObjectRWLockRead(doms);
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virObjectRWLockRead(doms);
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virHashForEach(doms->objs, virDomainObjListCopyInactiveNames, &data);
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virHashForEach(doms->objs, virDomainObjListCopyInactiveNames, &data);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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if (data.oom) {
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if (data.oom) {
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for (i = 0; i < data.numnames; i++)
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for (i = 0; i < data.numnames; i++)
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VIR_FREE(data.names[i]);
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VIR_FREE(data.names[i]);
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@ -794,7 +794,7 @@ virDomainObjListForEach(virDomainObjListPtr doms,
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};
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};
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virObjectRWLockRead(doms);
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virObjectRWLockRead(doms);
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virHashForEach(doms->objs, virDomainObjListHelper, &data);
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virHashForEach(doms->objs, virDomainObjListHelper, &data);
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virObjectUnlock(doms);
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virObjectRWUnlock(doms);
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return data.ret;
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return data.ret;
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}
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}
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@ -928,12 +928,12 @@ virDomainObjListCollect(virDomainObjListPtr domlist,
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virObjectRWLockRead(domlist);
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virObjectRWLockRead(domlist);
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sa_assert(domlist->objs);
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sa_assert(domlist->objs);
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if (VIR_ALLOC_N(data.vms, virHashSize(domlist->objs)) < 0) {
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if (VIR_ALLOC_N(data.vms, virHashSize(domlist->objs)) < 0) {
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virObjectUnlock(domlist);
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virObjectRWUnlock(domlist);
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return -1;
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return -1;
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}
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}
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virHashForEach(domlist->objs, virDomainObjListCollectIterator, &data);
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virHashForEach(domlist->objs, virDomainObjListCollectIterator, &data);
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virObjectUnlock(domlist);
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virObjectRWUnlock(domlist);
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virDomainObjListFilter(&data.vms, &data.nvms, conn, filter, flags);
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virDomainObjListFilter(&data.vms, &data.nvms, conn, filter, flags);
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@ -972,7 +972,7 @@ virDomainObjListConvert(virDomainObjListPtr domlist,
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if (skip_missing)
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if (skip_missing)
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continue;
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continue;
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virObjectUnlock(domlist);
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virObjectRWUnlock(domlist);
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virReportError(VIR_ERR_NO_DOMAIN,
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virReportError(VIR_ERR_NO_DOMAIN,
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_("no domain with matching uuid '%s' (%s)"),
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_("no domain with matching uuid '%s' (%s)"),
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uuidstr, dom->name);
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uuidstr, dom->name);
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@ -982,12 +982,12 @@ virDomainObjListConvert(virDomainObjListPtr domlist,
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virObjectRef(vm);
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virObjectRef(vm);
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if (VIR_APPEND_ELEMENT(*vms, *nvms, vm) < 0) {
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if (VIR_APPEND_ELEMENT(*vms, *nvms, vm) < 0) {
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virObjectUnlock(domlist);
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virObjectRWUnlock(domlist);
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virObjectUnref(vm);
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virObjectUnref(vm);
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goto error;
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goto error;
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}
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}
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}
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}
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virObjectUnlock(domlist);
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virObjectRWUnlock(domlist);
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sa_assert(*vms);
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sa_assert(*vms);
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virDomainObjListFilter(vms, nvms, conn, filter, flags);
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virDomainObjListFilter(vms, nvms, conn, filter, flags);
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@ -2313,6 +2313,7 @@ virObjectRef;
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virObjectRWLockableNew;
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virObjectRWLockableNew;
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virObjectRWLockRead;
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virObjectRWLockRead;
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virObjectRWLockWrite;
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virObjectRWLockWrite;
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virObjectRWUnlock;
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virObjectUnlock;
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virObjectUnlock;
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virObjectUnref;
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virObjectUnref;
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@ -428,7 +428,7 @@ virObjectLock(void *anyobj)
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* @anyobj: any instance of virObjectRWLockable
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* @anyobj: any instance of virObjectRWLockable
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*
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*
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* Acquire a read lock on @anyobj. The lock must be
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* Acquire a read lock on @anyobj. The lock must be
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* released by virObjectUnlock.
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* released by virObjectRWUnlock.
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*
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*
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* The caller is expected to have acquired a reference
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* The caller is expected to have acquired a reference
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* on the object before locking it (eg virObjectRef).
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* on the object before locking it (eg virObjectRef).
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@ -457,7 +457,7 @@ virObjectRWLockRead(void *anyobj)
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* @anyobj: any instance of virObjectRWLockable
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* @anyobj: any instance of virObjectRWLockable
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*
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*
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* Acquire a write lock on @anyobj. The lock must be
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* Acquire a write lock on @anyobj. The lock must be
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* released by virObjectUnlock.
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* released by virObjectRWUnlock.
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*
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*
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* The caller is expected to have acquired a reference
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* The caller is expected to have acquired a reference
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* on the object before locking it (eg virObjectRef).
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* on the object before locking it (eg virObjectRef).
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@ -483,26 +483,39 @@ virObjectRWLockWrite(void *anyobj)
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/**
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/**
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* virObjectUnlock:
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* virObjectUnlock:
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* @anyobj: any instance of virObjectLockable or virObjectRWLockable
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* @anyobj: any instance of virObjectLockable
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*
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*
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* Release a lock on @anyobj. The lock must have been acquired by
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* Release a lock on @anyobj. The lock must have been acquired by
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* virObjectLock, virObjectRWLockRead, or virObjectRWLockWrite.
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* virObjectLock.
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*/
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*/
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void
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void
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virObjectUnlock(void *anyobj)
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virObjectUnlock(void *anyobj)
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{
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{
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if (virObjectIsClass(anyobj, virObjectLockableClass)) {
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virObjectLockablePtr obj = virObjectGetLockableObj(anyobj);
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virObjectLockablePtr obj = anyobj;
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virMutexUnlock(&obj->lock);
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if (!obj)
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} else if (virObjectIsClass(anyobj, virObjectRWLockableClass)) {
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return;
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virObjectRWLockablePtr obj = anyobj;
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virRWLockUnlock(&obj->lock);
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virMutexUnlock(&obj->lock);
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} else {
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}
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virObjectPtr obj = anyobj;
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VIR_WARN("Object %p (%s) is not a virObjectLockable "
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"nor virObjectRWLockable instance",
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/**
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anyobj, obj ? obj->klass->name : "(unknown)");
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* virObjectRWUnlock:
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}
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* @anyobj: any instance of virObjectRWLockable
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*
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* Release a lock on @anyobj. The lock must have been acquired by
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* virObjectRWLockRead or virObjectRWLockWrite.
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*/
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void
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virObjectRWUnlock(void *anyobj)
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{
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virObjectRWLockablePtr obj = virObjectGetRWLockableObj(anyobj);
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if (!obj)
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return;
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virRWLockUnlock(&obj->lock);
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}
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}
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@ -136,6 +136,10 @@ void
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virObjectUnlock(void *lockableobj)
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virObjectUnlock(void *lockableobj)
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ATTRIBUTE_NONNULL(1);
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ATTRIBUTE_NONNULL(1);
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void
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virObjectRWUnlock(void *lockableobj)
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ATTRIBUTE_NONNULL(1);
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void
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void
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virObjectListFree(void *list);
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virObjectListFree(void *list);
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