[PD-dev] defining PDINSTANCE and PDTHREADS in libpd

[IOhannes m zmoelnig]

On 2017-04-17 22:03, Miller Puckette wrote:
> Meanwhile, there's no assumed relationship between instances and threads.

i was tempted to say hooray, but then...

... i discovered the use of the PERTHREAD macro which expands to
"__thread" which is the keyword for TLS (thread local storage);
i don't really see how this relates to "no assumed relationship between
instances and threads". (though i have to admit that i haven't fully
studied the code yet).

in any case, what's probably more important: it seems that at least some
of the compilers shipped with OSX do not support thread-local storage at
all [1].

this shows in the travis-ci builds, which currently fail for OSX:
    https://travis-ci.org/pure-data/pure-data/jobs/227985898

fgas,dr
IOhannes

[1] e.g. https://bugs.freedesktop.org/show_bug.cgi?id=98603
this thread also suggests, that there might be workarounds if one could
raise the "osx-minversion" to >=10.7

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