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* add proper fuxed-based locking for stdioRich Felker2011-07-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | previously, stdio used spinlocks, which would be unacceptable if we ever add support for thread priorities, and which yielded pathologically bad performance if an application attempted to use flockfile on a key file as a major/primary locking mechanism. i had held off on making this change for fear that it would hurt performance in the non-threaded case, but actually support for recursive locking had already inflicted that cost. by having the internal locking functions store a flag indicating whether they need to perform unlocking, rather than using the actual recursive lock counter, i was able to combine the conditionals at unlock time, eliminating any additional cost, and also avoid a nasty corner case where a huge number of calls to ftrylockfile could cause deadlock later at the point of internal locking. this commit also fixes some issues with usage of pthread_self conflicting with __attribute__((const)) which resulted in crashes with some compiler versions/optimizations, mainly in flockfile prior to pthread_create.
* move some more code out of pthread_create.cRich Felker2011-04-191-1/+2
| | | | this also de-uglifies the dummy function aliasing a bit.
* simplify pthread tsd key handlingRich Felker2011-04-031-1/+6
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* omit pthread tsd dtor code if tsd is not usedRich Felker2011-04-031-1/+18
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* use bss instead of mmap for main thread's pthread thread-specific dataRich Felker2011-04-011-0/+1
| | | | this simplifies code and removes a failure case
* greatly simplify pthread_key_create (~20% size reduction)Rich Felker2011-03-311-10/+9
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* optimize POSIX TSD for fast pthread_getspecificRich Felker2011-03-031-0/+1
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* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+25