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use stack space to keep cleanup information, this eliminates overhead of
calling malloc() and free() in thread library.
Discussed on: thread@
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svn path=/head/; revision=179662
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svn path=/head/; revision=165967
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svn path=/head/; revision=157457
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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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svn path=/head/; revision=144518
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_get_curthread(). This is similar to the kernel's curthread. Doing
this saves stack overhead and is more convenient to the programmer.
- Pass the pointer to the newly created thread to _thread_init().
- Remove _get_curthread_slow().
Notes:
svn path=/head/; revision=112965
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adaptation of libc_r for the thr system call interface. This is beta
quality code.
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svn path=/head/; revision=112918
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