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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: Sequence points and commit to memory
Date: Tue, 19 May 2015 08:37:21 -0700
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David Brown <david.brown@hesbynett.no> writes:
[...]
> C has no concept of interrupts, or of flow changes outside the sequence
> given in the source code, or of actions or effects outside the source
> code, except through the use of "volatile".  C compilers "support"
> interrupts in that they know there is no such thing!  This applies to
> /all/ C compilers on /all/ platforms - there are very few processors
> that don't have some sort of interrupt mechanism.
[...]

N1570 5.2.3 is titled "Signals and interrupts".  It requires that
a function's behavior is not altered when a signal is received,
as long as it uses only objects with automatic storage duration.

7.14 describes the <signals.h> header.

7.26 describes the <threads.h> header.

The "Signals and interrupts" discussion and <signals.h> go back to
C89/C90; <threads.h> is new in C11, and is optional.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"