Answering questions that may arise related to the meaning of portions of an IEEE standard concerning specific applications.

IEEE Standards Interpretation for IEEE Std 1003.1™-1990 IEEE Standard for Information Technology--Portable Operating System Interfaces (POSIX®)

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Interpretation Request #107
pthread_attr_init Relevant Sections: PASC

1003.1-1996, Section is not clear whether its permissible to reinitialize an already initialized thread attributes object. It would seem clear from the presence of the destroy operation that such an action should result in undefined behavior but needs stating here.

Add "The effect of initializing an already initialized thread attributes object is undefined" (after line 38, page 334)

Interpretation Response
The standard does not speak to this issue, and as such no conformance distinction can be made between alternative implementations based on this. This is being referred to the sponsor.

Rationale for Interpretation
This is an unaddressed issue, which is recommended be addressed in the 1003.1 revision.

Notes to the Project Editor (not part of this interpretation)
Apply the change proposed in section 11 to the 1003.1 revision. Forwarded to Interpretations group: 21 May 2000 Proposed resolution: 28 May 2000 Finalised Interpretation: 25 July 2000