Defect in XSH pthread_attr_destroy

[yyyyyyyy@xxxxxxx]

        Defect report from : Loic Domaigne , Personal Interest

(Please direct followup comments direct to yyyyyyyyyyyyyy@xxxxxxxxxxxxx)

@ page 981 line 31291 section pthread_attr_destroy comment {pthread_attr_init, 
issue EBUSY}

Problem:

Edition of Specification (Year): 2003

Defect code :  2. Omission

References are given against TC1.

In lines 31286-31287, it is said that:

| results are undefined if pthread_attr_init() is called specifying an 
| already initialized attr attributes object. 

However, the standard doesn't define any optional checking for this error.

Action:

At l31291-31294 (§ERRORS), add:

The pthread_attr_init() may fail if:

[EBUSY]
The implementation has detected an attempt to reinitialize the thread
attribute referenced by attr, a previously initialized, but not yet
destroyed, thread attribute.