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it's now atomic_lock to better reflect its usage, and librthread now
features a new spinlock that's really a ticket lock.
thrlseep can handle both types of lock via a flag in the clock arg.
(temp back compat hack)
remove some old stuff that's accumulated along the way and no longer used.
some feedback from dlg, who is concerned with all things ticket lock.
(you need to boot a new kernel before installing librthread)
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Make the code PIC-aware when necessary (i.e. invoke other functions through
the PLT, and access global data through the GOT). No change for non-PIC
compilation.
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particularly the "consume the signal you just sent" hang, and putting
the wait queues in userspace.
Do cancellation handling in pthread_cond_*wait(), pthread_join(),
and sem_wait().
Add __ prefix to thr{sleep,wakeup,exit,sigdivert}() syscalls; add
'abort" argument to thrsleep to close cancellation race; make
thr{sleep,wakeup} return errno values via *retval to avoid touching
userspace errno.
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errno. The ASM bits for _cerror are sketchy or missing for some archs
but that can be corrected in-tree.
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prototype for _atomic_lock
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