K 10
svn:author
V 7
davidxu
K 8
svn:date
V 27
2010-11-02T06:58:01.262672Z
K 7
svn:log
V 382
For simple mutex, we don't use thread id as owner data,
instead use some contants. This eliminates the need to link
the mutex into thread's private list, saves some cycles.
The m_owner is pointer of curthread, which is always duplicated
in child process after fork(), so for atfork handler in child process
which wants to unlock the mutex, it will success rather than return
EPERM.

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