CVS log for src/lib/libpthread/pthread_misc.c

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Keyword substitution: kv
Default branch: MAIN

pthread: Nix trailing whitespace.

libpthread: Move namespacing include to top of .c files.

Stuff like libc's namespace.h, or atomic_op_namespace.h, which does
namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint',
has to go at the top of each .c file.  If it goes in the middle, it
might be too late to affect the declarations, and result in compile
errors.

I tripped over this by including <sys/atomic.h> in mips
<machine/lock.h>.

(Maybe we should create a new pthread_namespace.h file for the
purpose, but this'll do for now.)

Merge changes from current as of 20200406

Check thread->pt_magic with PT_MAGIC promptly

Pull up following revision(s) (requested by ad in ticket #647):

	lib/libpthread/pthread_rwlock.c: revision 1.37 (patch)
	lib/libpthread/pthread_misc.c: revision 1.16
	lib/libpthread/pthread.c: revision 1.154
	lib/libpthread/pthread_int.h: revision 1.98
	lib/libpthread/pthread_cond.c: revision 1.66
	lib/libpthread/pthread_mutex.c: revision 1.66

Rip out some very ambitious optimisations around pthread_mutex that are
don't buy much.  This stuff is hard enough to get right in the kernel let
alone userspace, and I don't trust that it's right.

Rip out some very ambitious optimisations around pthread_mutex that are
don't buy much.  This stuff is hard enough to get right in the kernel let
alone userspace, and I don't trust that it's right.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

resync from head

Pull up following revision(s) (requested by manu in ticket #869):
	lib/libpthread/pthread_rwlock.c: revision 1.33
	lib/libc/include/reentrant.h: revision 1.16
	lib/libpthread/pthread_cond.c: revision 1.59
	lib/libpthread/pthread_misc.c: revision 1.15
	lib/libc/thread-stub/thread-stub.c: revision 1.23
	lib/libpthread/pthread_cancelstub.c: revision 1.38
	lib/libpthread/pthread_specific.c: revision 1.26
	lib/libpthread/pthread_mutex.c: revision 1.56
	lib/libpthread/pthread_tsd.c: revision 1.11
	lib/libpthread/Makefile: revision 1.80
	lib/libpthread/pthread.c: revision 1.143
	lib/libpthread/pthread_int.h: revision 1.89
- Allow libpthread to be dlopened again, by providing libc stubs to
libpthread.
- Fail if the dlopened libpthread does pthread_create(). From manu@
- Discussed at length in the mailing lists; approved by core@
- This was chosen as the least intrusive patch that will provide
  the necessary functionality.
XXX: pullup to 6

- Allow libpthread to be dlopened again, by providing libc stubs to libpthread.
- Fail if the dlopened libpthread does pthread_create(). From manu@
- Discussed at length in the mailing lists; approved by core@
- This was chosen as the least intrusive patch that will provide
  the necessary functionality.
XXX: pullup to 6

sync to netbsd-5

Pull up following revision(s) (requested by enami in ticket #921):
	lib/libpthread/pthread_misc.c: revision 1.14 via patch
	lib/libpthread/pthread_cancelstub.c: revision 1.27 via patch
Make nanosleep cancelable again.

Make nanosleep cancelable again.

merge christos-time_t

commit changes to the right branch.

file pthread_misc.c was added on branch christos-time_t on 2008-12-29 15:10:58 +0000

revert previous. It was meant for the branch

adjust for time_t 64

Sync with wrstuden-revivesa-base-2.

Shut lint up.

pthread_kill, pthread_sigmask: return errno, not the return from the system
call. Found by VSTHlite.

sync with head.

Remove clause 3 and 4 from TNF licenses

sync with HEAD

- Remove libpthread's atomic ops.
- Remove the old spinlock-based mutex and rwlock implementations.
- Use the atomic ops from libc.

update for _sched_{get,set}param changes.  from rmind@.

sched_setparam: fix the case when incorrect (according to the class)
in-kernel priority is used.  Reported by <drochner>.

Minor fixes for scheduling calls to conform the POSIX:
- If pid is equal to zero, use the calling process;
- In case of permission problem, return EPERM instead of EACESS;
- sched_setscheduler() should return previously used policy;
- pthread_* calls should return the error code or zero;

Should fix the namespace problems (and builds of some packages):
- Move cpuset_t defintion from pset.h to sched.h;
- Remove the #include of pset.h in pthread.h;

Implementation of processor-sets, affinity and POSIX real-time extensions.
Add schedctl(8) - a program to control scheduling of processes and threads.

Notes:
- This is supported only by SCHED_M2;
- Migration of LWP mechanism will be revisited;

Proposed on: <tech-kern>. Reviewed by: <ad>.

sync with HEAD

Mutexes:

- Play scrooge again and chop more cycles off acquire/release.
- Spin while the lock holder is running on another CPU (adaptive mutexes).
- Do non-atomic release.

Threadreg:

- Add the necessary hooks to use a thread register.
- Add the code for i386, using %gs.
- Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.

Sync with HEAD.

Trim fat off libpthread internal spinlock operations. Makes a mesurable
improvement across the board.

Remove the PTHREAD_SA option. If M:N threads is reimplemented it's
better off done with a seperate library.