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Appendix B - Pthreads Draft 4 vs. the Final Standard

Pthreads Programming
Bradford Nichols, Dick Buttlar and Jacqueline Proulx Farrell
 Copyright 1996 O'Reilly & Associates, Inc.

System Interfaces and Cancellation-Safety
Feature: Draft 4 requires implementations to make some ANSI C routines, but no POSIX.1 routines, cancellation-safe; the final standard doesn't require that any ANSI C or POSIX.1 routines be cancellation-safe. 
Feature: Draft 4 doesn't require any system or library call to act as a cancellation point; the final standard requires many calls to be cancellation points. 

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