IEEE Standards Interpretation for IEEE Std 1003.1™-1990 IEEE Standard for Information Technology--Portable Operating System Interfaces (POSIX®)
Copyright © 2001 by the Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue New York, New York 10016-5997 USA All Rights Reserved.
Interpretations are issued to explain and clarify the intent of a standard and do not constitute an alteration to the original standard. In addition, interpretations are not intended to supply consulting information. Permission is hereby granted to download and print one copy of this document. Individuals seeking permission to reproduce and/or distribute this document in its entirety or portions of this document must contact the IEEE Standards Department for the appropriate license. Use of the information contained in this document is at your own risk.
IEEE Standards Department Copyrights and Permissions 445 Hoes Lane, Piscataway, New Jersey 08855-1331, USA
Interpretation Request #88
Topic: PTHREAD_KEYS_MAX Relevant Sections: 2.8.5, 126.96.36.199 PASC
Q1. How accurate does the value returned by sysconf(_SC_THREAD_KEYS_MAX)
have to be?
Q2.Should an application be able to utilise the exact number returned ?
Q3.Is an implementation allowed to use some keys in its system libraries?
Q4.Is an implementation which claimed to provide a maximum of 256 (for example) thread specific data keys but actually could provide only 3 (to pick an extreme case) keys to an application (the rest being used by system libraries, etc) conforming?
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
Forwarded to Interpretations group: 19 Apr 1998 Proposed interpretation: 17 Jul 1998 Finalised: February 17 1999