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1. fast simple type mutex.
2. __thread tls works.
3. asynchronous cancellation works ( using signal ).
4. thread synchronization is fully based on umtx, mainly, condition
variable and other synchronization objects were rewritten by using
umtx directly. those objects can be shared between processes via
shared memory, it has to change ABI which does not happen yet.
5. default stack size is increased to 1M on 32 bits platform, 2M for
64 bits platform.
As the result, some mysql super-smack benchmarks show performance is
improved massivly.
Okayed by: jeff, mtm, rwatson, scottl
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These files had tags after the copyright notice,
inside the comment block (incorrect, removed),
and outside the comment block (correct).
Approved by: rwatson (mentor)
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screwed beyond all help, so it can just skip the pthreads wrapper
for write(2) and call directly into it.
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o removed unused variables
o explicit inclusion of header files
o prototypes for externally defined functions
Approved by: re/blanket libthr
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adaptation of libc_r for the thr system call interface. This is beta
quality code.
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