Re: [libvirt] [PATCH] Improve on virAtomic implementation

This patch improves on the previously added virAtomicInt operations by testing for the compiler and if GCC >= 4.1 (not found in docs prior to that) is used on Linux and has the appropriate processor (that I have access to) then use the implementation based on the gcc-builtins. I also did not look at other systems (cygwin, win32) that do not need access to virAtomic right now. --- src/util/viratomic.h | 88 +++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 72 insertions(+), 16 deletions(-) Index: libvirt-acl/src/util/viratomic.h =================================================================== --- libvirt-acl.orig/src/util/viratomic.h +++ libvirt-acl/src/util/viratomic.h @@ -30,6 +30,22 @@ typedef struct _virAtomicInt virAtomicInt; typedef virAtomicInt *virAtomicIntPtr; +# define __VIR_ATOMIC_USES_LOCK + +# if defined(__GNUC__) +# if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 1)) || (__GNUC__ > 4) +# if defined(__linux__) +# if defined(__i386__) || defined(__x86_64__) || \ + defined(__powerpc64__) || defined(__powerpc__)