CVS commit: src/include

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Mon Sep  9 12:01:01 UTC 2024

Modified Files:
        src/include: limits.h

Log Message:
limits.h: Define PTHREAD_STACK_MIN and tidy up comments.

Define this to be 4096, which is (as far as I can tell) the smallest
possible page size on any architecture NetBSD supports.  This should
be MIN_PAGE_SIZE instead, but I don't think that is exposed in any
way that doesn't badly pollute the namespace.  We should maybe have a
__MIN_PAGE_SIZE defined in some header file exposed to userland.

Of course, applications actually need to allocate at least
sysconf(_SC_THREAD_STACK_MIN) = getpagesize() bytes, which may be
larger than PTHREAD_STACK_MIN.

The various feature flags (dates) like _POSIX_THREAD_ATTR_STACKADDR
are defined (or not defined) by unistd.h, not by limits.h, so there's
no value in mentioning them here -- and the comment is wrong about
most of them (we have implemented _POSIX_THREAD_ATTR_STACKADDR, for
example).

PR standards/45435: PTHREAD_KEYS_MAX et al. missing in <limits.h>


To generate a diff of this commit:
cvs rdiff -u -r1.44 -r1.45 src/include/limits.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.