src/lib/libthr/thread/thr_fork.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.

Don't inherit THR_FLAGS_NEED_SUSPEND for child process, child process

2006-10-14T13:40:08+00:00

only has one thread, setting the flag can cause the thread to be
suspended and no another thread will resume it.

Replace internal usage of struct umtx with umutex which can supports

2006-09-06T04:04:10+00:00

real-time if we want, no functionality is changed.

WARNS level 4 cleanup.

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

In preparation for a new malloc implementation:

2006-01-12T07:28:21+00:00

  * Add posix_memalign().

  * Move calloc() from calloc.c to malloc.c.  Add a calloc() implementation in
    rtld-elf in order to make the loader happy (even though calloc() isn't
    used in rtld-elf).

  * Add _malloc_prefork() and _malloc_postfork(), and use them instead of
    directly manipulating __malloc_lock.

Approved by:	phk, markm (mentor)

Remove in-progress wait code to sync with libpthread's behavior.

2006-01-03T13:30:23+00:00

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