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Message-ID: <1406282437.6438.34.camel@eris.loria.fr>
Date: Fri, 25 Jul 2014 12:00:37 +0200
From: Jens Gustedt <jens.gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: C11 threads
Hi everybody,
after I have seen that gcc since 4.9 has a working implementation of
atomics, I convinced myself to implement C11 threads within musl.
I was really amazed, in essence this was just work of several
hours. The cleanness of musl made it really a pleasant experience.
I think the implementation is straight forward, there are only very
few minor glitches possible. But I thought that I first discuss with
you.
Choices :
- all types are just the corresponding POSIX types
Issues :
- a lot of C11 are just weak symbols. to avoid polluting the link
space of a C11 application, I had to transform a lot of POSIX
function symbols into weak symbols, too.
- the include file threads.h includes pthread.h, so the namespace of
the C11 implementation is poluted with the pthreads stuff
- pthread_create and thrd_create are still too tightly linked
together. It would be good to split the corresponding file in two,
but this would make maintenance a bit more difficult.
- there are still some symbols missing, for some of the functions
that I implemented as macro. work for a winter day
- I don't have much tests for all of this
I join my version of the threads.h file that has some comments on the
minor choices.
Jens
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View attachment "threads.h" of type "text/x-chdr" (3758 bytes)
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