Thanks Ebrahim. Hi Robin, I'm confused. HarfBuzz definitely IS completely threadsafe to the best of my knowledge. That was one of the strong design goals. I have had to maintain, debug, and fix threadsafety issues in FreeType, fontconfig, and Pango over the years, so I definitely know the issues and tried to address them all in HarfBuzz.
* It is utterly thread unsafe. It uses statics to hold * structures in, meaning that if it is ever called from * more than one thread at a time, access to such * structures can race. This can't be farther from true. I use compare-and-exchange to safely implement singleton initializations or prepend-only linked-lists as caches. How is that not threadsafe? Runtime-configurable custom allocators are different issue. I don't believe they are a useful feature and have not yet seen a compelling usecase. Since Robin is not on the mailing list, let's continue on github: https://github.com/behdad/harfbuzz/issues/497 behdad PS. Sometime I think about shutting down the list and using github exclusively. What do people think? On Thu, Jun 15, 2017 at 12:18 PM, Ebrahim Byagowi <ebrami...@gmail.com> wrote: > Hi! > > Thanks for your encouraging words :) > > forwarding to hb mailing list > > > On Thu, Jun 15, 2017 at 3:46 AM, Robin Watts <robin.wa...@artifex.com> > wrote: > >> On 14/06/2017 21:37, Ebrahim Byagowi wrote: >> >>> I wonder if is possible to turn this <https://github.com/ccxvii/mup >>> df/blob/master/source/fitz/harfbuzz.c#L12> comment about harfbuzz on >>> mupdf project into some doable/trackable tasks on harfbuzz bug tracker or >>> are they just might not possible to solve because of ABI compatibility (or >>> fixed already)? Thanks >>> >>> (bcc'ed the author to this thread also) >>> >> >> Hi. >> >> I'd LOVE to see Harfbuzz fixed. It's a brilliant library, let down by >> this major flaw. >> >> My experience of fixing such issues in several projects is that fixing it >> in involves extensive, but ultimately simple, plumbing through of a context >> field. >> >> It's not brain surgery, but it's tedious, and it's not something I'd >> undertake myself without knowing in advance that it would stand a good >> chance of being accepted. >> >> I'd love to work with anyone that would be prepared to try to fix this. >> >> Sadly, I believe that such things would involve a break to the ABI >> though... >> >> (I fear this may bounce because I'm not on the harfbuzz list...) >> >> Robin >> > > > _______________________________________________ > HarfBuzz mailing list > HarfBuzz@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/harfbuzz > > -- behdad http://behdad.org/
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