On Monday 04 October 2010 13:19:45 Andrea Canciani wrote: > On Sun, Oct 3, 2010 at 10:52 PM, Siarhei Siamashka > > <[email protected]> wrote: > > From: Siarhei Siamashka <[email protected]> > > > > There is attribute 'constructor' supported since gcc 2.7 which allows > > to have a constructor function for library initialization. This > > eliminates an extra branch for each composite operation and also helps > > to avoid complains from race condition detection tools like helgrind. > > I'm working on threadsafety issues, too, but I don't have a patch ready > I pushed > http://cgit.freedesktop.org/~ranma42/pixman/commit/?h=wip/simpleops which > adds atomic refcounting and (private, automatically called) > init/fini functions to pixman. > > Currently the simpleops library (available at > http://cgit.freedesktop.org/~ranma42/simpleops ) > is not complete, but in a not very distant future it should provide > some commonly > available features that with different syntax on each os/compiler (in > particular, atomics, > mutexes, integers of various sizes, constructors/destructors, thread > local storage). > It should basically be a bunch of headers to hide the > platform-specific naming and some > autotools magic to detect what is available. > > I'm working on MacOS X and Ubuntu and compiling with gcc for x86_64, > so most of the > library is untested, but I expect only minor changes to be needed in > most cases, since > it is based on code from cairo and/or pixman. > > I'm also working on a wip/simpleops branch in cairo, so that the same > code can be shared > between the two libraries (and moving non graphic-related code out of > them). > > Does this look like a viable approach for having these functionalities > in pixman? > Right now I'm mainly interested in atomic refcounting and valgrind > cleanness (threadsafe > initialization, destroying pixman_implementation's upon finalization), > but cleaning up the > TLS stuff would be nice, too.
Yes, I remember. I just was a bit worried about the absence of recent news from this front. It's not like you are the only one interested in this stuff ;) Should I just drop this simple patch and wait for something better to come from you soon? -- Best regards, Siarhei Siamashka
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