src/lib/libthr/thread/thr_exit.c, branch release/7.0.0_cvs

This commit was manufactured by cvs2svn to create tag

2008-02-24T05:45:17+00:00

'RELENG_7_0_0_RELEASE'.

This commit was manufactured to restore the state of the 7.0-RELEASE image.

Remove 3rd clause, renumber, ok per email

2007-01-12T07:26:21+00:00

Eliminate atomic operations in thread cancellation functions, it should

2006-11-24T09:57:38+00:00

reduce overheads of cancellation points.

WARNS level 4 cleanup.

2006-04-04T02:57:49+00:00

Refine thread suspension code, now thread suspension is a blockable

2006-01-05T13:51:22+00:00

operation, the caller is blocked util target threads are really
suspended, also avoid suspending a thread when it is holding a
critical lock.
Fix a bug in _thr_ref_delete which tests a never set flag.

Follow the change in kernel, joiner thread just waits at thread id

2005-10-26T07:11:43+00:00

address, let kernel wake it up.

Add debugger event reporting support, current only TD_CREATE and TD_DEATH

2005-04-12T03:00:28+00:00

events are reported.

Import my recent 1:1 threading working. some features improved includes:

2005-04-02T01:20:00+00:00

 1. fast simple type mutex.
 2. __thread tls works.
 3. asynchronous cancellation works ( using signal ).
 4. thread synchronization is fully based on umtx, mainly, condition
    variable and other synchronization objects were rewritten by using
    umtx directly. those objects can be shared between processes via
    shared memory, it has to change ABI which does not happen yet.
 5. default stack size is increased to 1M on 32 bits platform, 2M for
    64 bits platform.
As the result, some mysql super-smack benchmarks show performance is
improved massivly.

Okayed by: jeff, mtm, rwatson, scottl

1. Now that it's a thread's state is changed from within the kernel, where

2004-10-13T11:42:20+00:00

   no userland locks are heald, the dead thread lock can no longer protect
   access to it. Therefore, instead of using an if (!dead)...else clause
   after walking the active threads list test the thread pointer before
   deciding not to walk the dead threads list. If the thread pointer is null
   it means it was not found in the active threads list and the dead threads
   list should be checked.

2. Do not free the stack of a thread that is not marked dead. This is the
   2nd and final part of eliminating the race to free a thread's stack.

MFC after: 3 days

Remove a reference to a non-existent syscall: _thr_exit(). The

2004-10-08T14:48:02+00:00

actual name is thr_exit(). How this ever worked is beyond me.