On 04/17/2012 08:44 AM, Stefan Berger wrote:
For threading support, add atomic add and sub operations working on integers. Base this on locking support provided by virMutex.
--- src/util/viratomic.h | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+)
Index: libvirt-acl/src/util/viratomic.h
+typedef struct _virAtomicInt virAtomicInt; +typedef virAtomicInt *virAtomicIntPtr; + +struct _virAtomicInt { + virMutex lock; + int value; +};
virMutex is very heavyweight. I'd love it if we could use gcc primitives and/or MSVC libc primitives (where they are known to be available), for a lighter-weight implementation on platforms that support it. See this patch proposal (now a year old!) for some ideas that we should fold in before 0.9.12: https://www.redhat.com/archives/libvir-list/2011-April/msg00368.html -- Eric Blake eblake@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org