[ros-dev] Re: [ros-svn] [ion] 20554: - Fix shamefully dangerously
broken Work Thread/Queue/Item implementation:
osexpert at googlemail.com
Fri Jan 6 00:44:12 CET 2006
Alex Ionescu wrote:
> Hartmut Birr wrote:
>> there are three places in the kernel, which does remove wait blocks.
>> They are in KiAbortWaitThread, KiInsertQueue and KiBlockThread. Only in
>> KiBlockThread, Thread->WaitBlockList is set to NULL. Is this the
>> - Hartmut
> I have been reading Windows Internals II and Windows Internals 4th
> Edition and I see that the wait blocks are actually supposed to be a
> circular list... so there should never really be any "NULL". It's
> possible I based some previous code on this knowledge, which is now
> conflicting with the ROS implementation of a null-terminated list. I
> will change the wait code to use circular lists as documented and post
> a patch.
> Best regards,
> Alex Ionescu
I think, the real problem isn't if the list is NULL terminated or if the
WaitBlockList entry from thread is NULL. The real problem is,
KiAbortWaitThread is called for a thread which does not waiting.
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