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* Implement PThreads barriers and barrier attributes.mtm2004-02-191-0/+1
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* Change all instances of THR_LOCK/UNLOCK, etc to UMTX_*.mtm2003-07-061-2/+2
| | | | | It is a more acurate description of the locks they operate on.
* There's no need for _umtxtrylock to be a separate function.mtm2003-07-061-1/+2
| | | | Roll it into the pre-existing macro that's used to call it.
* Sweep through pthread locking and use the new locking primitives formtm2003-06-291-2/+2
| | | | libthr.
* _pthread_cancel() breaks the normal lock order of first locking themtm2003-05-251-4/+17
| | | | | | | | | | | | | joined and then the joiner thread. There isn't an easy (sane?) way to make it use the correct order without introducing races involving the target thread and finding which (active or dead) list it is on. So, after locking the canceled thread it will try to lock the joined thread and if it fails release the first lock and try again from the top. Introduce a new function, _spintrylock, which is simply a wrapper arround umtx_trylock(), to help accomplish this. Approved by: re/blanket libthr
* Make WARNS2 clean. The fixes mostly included:mtm2003-05-231-0/+1
| | | | | | | | o removed unused variables o explicit inclusion of header files o prototypes for externally defined functions Approved by: re/blanket libthr
* o Make the setting/checking of cancel state atomic withmtm2003-05-151-87/+111
| | | | | | | | | | | | | | respect to other threads and signal handlers by moving to the _thread_critical_enter/exit functions. o Introduce an static function, testcancel(), that is used by the other functions in this module. This allows it to make locking assumptions that the top-level functions can't. o Rework the code flow a bit to reduce indentation levels. Approved by: markm/mentor, re/blanket libthr Reviewed by: jeff
* - Define curthread as _get_curthread() and remove all direct calls tojeff2003-04-021-10/+0
| | | | | | | _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().
* - Add libthr but don't hook it up to the regular build yet. This is anjeff2003-04-011-0/+205
adaptation of libc_r for the thr system call interface. This is beta quality code.
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