src/lib/libthr/thread, branch release/5.4.0

MFC:

2005-02-05T01:02:51Z

2004-11-27 06:51:39 UTC Don't include sys/user.h merely for its side-effect of recursively including other headers.

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2004-10-09T15:37:42Z

revision 1.41 date: 2004/09/16 13:55:46; author: mtm; state: Exp; lines: +21 -0 Implement cancellation points in libc interfaces, as specified by POSIX. ============================================================================= Approved by: re/scottl

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2004-10-09T15:13:50Z

revision 1.32 date: 2004/09/22 18:51:16; author: mtm; state: Exp; lines: +1 -14 Remove vestiges of libthr's signal mangling past. This fixes that last known problem with mysql on libthr: not being able to kill mysqld. ---------------------------- revision 1.31 date: 2004/09/22 16:53:23; author: mtm; state: Exp; lines: +6 -27 The SUSv3 function say that the affected functions MAY FAIL, if the specified mutex is invalid. In spec parlance 'MAY FAIL' means it's up to the implementor. So, remove the check for NULL pointers for two reasons: 1. A mutex may be invalid without necessarily being NULL. 2. If the pointer to the mutex is NULL core-dumping in the vicinity of the problem is much much much better than failing in some other part of the code (especially when the application doesn't check the return value of the function that you oh so helpfully set to EINVAL). ============================================================================= Approved by: re/scottl

MFC:

2004-10-09T15:12:33Z

---------------------------- revision 1.15 date: 2004/10/08 14:48:02; author: mtm; state: Exp; lines: +1 -4 Remove a reference to a non-existent syscall: _thr_exit(). The actual name is thr_exit(). How this ever worked is beyond me. ---------------------------- revision 1.14 date: 2004/10/06 14:20:57; author: mtm; state: Exp; lines: +2 -3 Close a race between a thread exiting and the freeing of it's stack. After some discussion the best option seems to be to signal the thread's death from within the kernel. This requires that thr_exit() take an argument. Discussed with: davidxu, deischen, marcel MFC after: 3 days ============================================================================= Approved by: re/scottl

o Assertions to catch that stuff that shouldn't happen is not happening.

2004-07-30T17:13:00Z

o In the rwlock code: move a duplicated check inside an if..else to after the if...else clause. o When initializing a static rwlock move the initialization check inside the lock. o In thr_setschedparam.c: When breaking out of the trylock...retry if busy loop make sure to reset the mtx pointer to null if the mutex is nolonger in a queue.

Define _libthr_debug for use by libthread_db.

2004-07-18T04:23:30Z

Record the offset of thr_id in the thread structure. Required for

2004-07-04T19:07:07Z

debugging.

Change the thread ID (thr_id_t) used for 1:1 threading from being a

2004-07-02T00:40:07Z

pointer to the corresponding struct thread to the thread ID (lwpid_t) assigned to that thread. The primary reason for this change is that libthr now internally uses the same ID as the debugger and the kernel when referencing to a kernel thread. This allows us to implement the support for debugging without additional translations and/or mappings. To preserve the ABI, the 1:1 threading syscalls, including the umtx locking API have not been changed to work on a lwpid_t. Instead the 1:1 threading syscalls operate on long and the umtx locking API has not been changed except for the contested bit. Previously this was the least significant bit. Now it's the most significant bit. Since the contested bit should not be tested by userland, this change is not expected to be visible. Just to be sure, UMTX_CONTESTED has been removed from . Reviewed by: mtm@ ABI preservation tested on: i386, ia64

When a thread is created suspended have libthr suspend it explicitly

2004-06-30T15:57:36Z

instead of asking the kernel to do it when we create the thread.

Implement pthread_atfork in libthr. This is mostly from deichen's

2004-06-27T10:01:35Z

work in libpthread. Submitted by: Dan Nelson