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which run for many cycles and may even sleep. This leads to other threads
spinning for a long time waiting on the lock. Using a mutex means those
threads go to sleep and get woken up when the lock is released, which results
in a lot less CPU usage. More work is needed to improve the performance of
threaded code that suffers from malloc lock contention, but this diff makes
ports like Firefox significantly more usable.
Tested by many.
ok mpi@, guenther@, tedu@, jca@
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eliminates a chunk of complexity from the libpthread init and the fork
wrapper, as it was the bind lock that needed prebinding before use.
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with ld.so locking whenever building NOPIC
pointless use of __ELF__ noted by brad@
ok miod@
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may have been grabbed by another thread in the parent before the fork
problem report from dcoppa@, ok kettenis@
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unregistering callbacks if the DSO is unloaded. Move the callback
handling from libpthread to libc, though libpthread still overrides the
inner call to handle locking and thread-library reinitialization.
Major version bump for both libc and libpthread.
verification that this fixes various ports ajacoutot@
asm assistance miod@; ok millert@ deraadt@
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thread's existing handle must continue to be valid and it didn't
fully 'change' the thread handle anyway. For pthread_main_np(),
use a new flag, THREAD_ORIGINAL, to indicate that the flagged thread
is the original thread for *this* process.
Fixes some ConsoleKit failures according to aja@
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backtrace of example case from sthen@
ok kettenis@ millert@
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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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we should actually check for _DYNAMIC at run-time rather than checking
for __PIC__ at compile time, since the two are actually independent.
Problem and solution identified by guenther; minor tweaks by me.
ok guenther
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from bsd.lib.mk for C source files.
ok deraadt, pascal
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kernel so that librthread can detect when a thread is completely
done with its stack without need a kqueue. The dying thread moves
itself to a GC list, other threads scan the GC list on pthread_create()
and pthread_join() and free the stack and handle once the thread's
thread id is zeroed.
"get it in" deraadt@, tedu@, cheers by others
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is needed to avoid deadlocks in popen() on FILE locking.
ok kurt@
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- Make an effort to protect important libc and ld.so critical areas during
the fork(2)/vfork(2) sys call.
- Add pthread_atfork(3) implementation based on Daniel Eischen's code.
Original diff by Philip Guenther <guenther at gmail.com> with some
additions and refinements by me. Positive test report from brad@ with
many kde apps. fork(2) and pthread_atfork(3) pthread regresses pass.
okay tedu@, kettenis@, marc@
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kettenis
guenther
tedu
matthew
kurt