Greg Stark <gsstark(at)mit(dot)edu> writes:
> On the other hand, things like, getpwnam, strtok, etc have non-thread-safe
> APIs. They can never be made thread-safe. The *_r versions of these functions
> are standardized and required. If they don't exist then the platform simply
> does not support threads.
This statement is simply false. A platform can build thread-safe
versions of those "unsafe" APIs if it makes the return values point
to thread-local storage. Some BSDs do it that way. Accordingly, any
simplistic "we must have _r to be thread-safe" approach is incorrect.
regards, tom lane