these files do not need sys/param.h

Start mapping thread stacks with MAP_STACK. mmap() currently ignores
the flag, but some problem identification can begin.

Shift top-of-stack down so that the random==0 case doesn't leave stack
pointer beyond the space.
ok stefan, tedu

Move mutex, condvar, and thread-specific data routes, pthread_once, and
pthread_exit from libpthread to libc, along with low-level bits to
support them. Major bump to both libc and libpthread.

Requ

Move mutex, condvar, and thread-specific data routes, pthread_once, and
pthread_exit from libpthread to libc, along with low-level bits to
support them. Major bump to both libc and libpthread.

Requested by libressl team. Ports testing by naddy@
ok kettenis@

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Get rid of ticket support, replace "struct _spinlock" with "_atomic_lock_t".

ok tedu@

delete wrong cvs $ tags

Add back <sys/param.h>; it's needed for MACHINE_STACK_GROWS_UP.

ok millert@, tobiasu@

Move to the <limits.h> universe.
review by millert, binary checking process with doug, concept with guenther

Fix mmap() flag usage: explicitly specify MAP_PRIVATE and drop useless
MAP_FILE and MAP_HASSEMAPHORE flags.

Discussed with deraadt, tedu, and kettenis

Provide a random stackgrap on pthread frames. Use _STACKALIGNBYTES to
ensure the frames are aligned correctly. Discussed at length with guenther
and kettenis
ok kettenis, this is the right first step

cleanup and consolidate the spinlock_lock (what a name!) code.
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 h

cleanup and consolidate the spinlock_lock (what a name!) code.
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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Do not need machine/param.h

Fix caching of stacks allocated with the default attributes.

based on a diff from Christian Schulte (cs at schulte.it)

Use 'base' as an intermediate char* variable to avoid void* arithmetic

Fix the handling of the stackaddr, stacksize, and guardsize attributes:
don't try to merge values, round the sizes separately, and don't try to
unmap application-supplied stacks.
Copy from uthread th

Fix the handling of the stackaddr, stacksize, and guardsize attributes:
don't try to merge values, round the sizes separately, and don't try to
unmap application-supplied stacks.
Copy from uthread the caching of default-sized stacks.
Have pthread_attr_init() and pthread_create() get the default attributes
from staticly allocated pthread_attr_t.
Cache the pagesize in _rthread_init() and provide a macro for rounding to it

based on suggestions from kettenis@ and tedu@, ok kettenis@

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Move <machine/spinlock.h> into rthread.h; strip out unnecessary #includes

If the stack size attribute isn't larger than the guard-page size
attribute then make pthread_create() return EINVAL instead of whatever
was in errno on entry (possibly making it appear it succeeded

If the stack size attribute isn't larger than the guard-page size
attribute then make pthread_create() return EINVAL instead of whatever
was in errno on entry (possibly making it appear it succeeded when it
really failed). Encountered by Jung (moorang at gmail.com).

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two comment typos from tbert

Remove redundant mprotect() calls (we're unmapping the region anyway)
and check user stack for proper alignment. ok tedu@ marc@

thread stack handling changes. Add guard zones and allow stack
size (and guard zone size) to be set using pthread_attr. Guard
zones are specified in bytes, but implemented in terms of a
page size.

thread stack handling changes. Add guard zones and allow stack
size (and guard zone size) to be set using pthread_attr. Guard
zones are specified in bytes, but implemented in terms of a
page size.

OK Otto@

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