Re: [libvirt] Potential race condition problem

Hi, OK. Now I am using JNA to access libvirt. If we add another mutex which used to access “initialized” parameter. This mutex must be pthread_mutex_init firstly and only once. But it seems that there is no way to change libvirt code. I do it as following: 1.Changing libvirt JNA code in Connect.java Old Code: public Connect(String uri) throws LibvirtException { VCP = libvirt.virConnectOpen(uri); // Check for an error processError(); ErrorHandler.processError(Libvirt.INSTANCE); } New Code: public Connect(String uri) throws LibvirtException { synchronized(this.getClass()) { VCP = libvirt.virConnectOpen(uri); } // Check for an error processError(); ErrorHandler.processError(Libvirt.INSTANCE); } This can make sure only that one thread can execute Connect. For a server application, we only need one time. So the performance is OK 2.Changing libvirt code in libvirt.c Old Code: static int initialized = 0; New Code: static int volatile initialized = 0; This can make sure the initialization will be executed once. Would you give your comments for this solution? B.R. Benjamin Wang