[libvirt] [PATCH 0/6] virObject for reference-counting

This series adds a virObject structure that manages reference-counting. Some notes about referece-counting introduced by this series: A thread owns a virObject by incrementing its reference-count by 1. If a thread owns a virObject, the virObject is guarenteed not be freed until the thread releases ownership by decrementing its reference-count by 1. A thread can't access a virObject after it releases the ownership of virObject because it can be freed at anytime. A thread can own a virObject legally in these ways: - a thread owns a virObject that it creates. - a thread owns a virObject if another thread passes the ownership to it. Example: qemuMonitorOpen - a thread gets a virObject from a container. Example: virDomainFindByUUID - a container owns a virObject by incrementing its reference-count by 1 before adding it to the container - if a virObject is removed from a container its reference-count must be decremented by 1 By following these rules, there is no need to protect operations on an object's reference-count by an external lock. (like in old ways virDomainObj lock protects qemu monitor's ref-count.) This series is a draft and posted for early review. Any comments are welcome. Hu Tao (6): Add virObject and virAtomic. use virObject to manage reference-count of qemud_client use virObject to manage reference-count of virDomainObj qemu: use virObject to manages reference-counting for qemu monitor remove qemuDomainObjEnterMonitorWithDriver and qemuDomainObjExitMonitorWithDriver remove qemuDomainObjBeginJobWithDriver daemon/dispatch.c | 2 - daemon/libvirtd.c | 62 ++++++-- daemon/libvirtd.h | 5 +- src/Makefile.am | 2 + src/conf/domain_conf.c | 56 ++++---- src/conf/domain_conf.h | 6 +- src/libvirt_private.syms | 5 + src/openvz/openvz_conf.c | 8 +- src/qemu/qemu_domain.c | 121 +-------------- src/qemu/qemu_domain.h | 8 +- src/qemu/qemu_driver.c | 358 ++++++++++++++++++++------------------------- src/qemu/qemu_hotplug.c | 90 ++++++------ src/qemu/qemu_migration.c | 101 ++++++------- src/qemu/qemu_monitor.c | 109 ++++++++------- src/qemu/qemu_monitor.h | 4 +- src/qemu/qemu_process.c | 99 ++++++------- src/util/viratomic.c | 46 ++++++ src/util/viratomic.h | 30 ++++ src/util/virobject.c | 52 +++++++ src/util/virobject.h | 39 +++++ src/vmware/vmware_conf.c | 2 +- 21 files changed, 628 insertions(+), 577 deletions(-) create mode 100644 src/util/viratomic.c create mode 100644 src/util/viratomic.h create mode 100644 src/util/virobject.c create mode 100644 src/util/virobject.h -- 1.7.3.1