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author | theraven <theraven@FreeBSD.org> | 2011-12-07 15:25:48 +0000 |
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committer | theraven <theraven@FreeBSD.org> | 2011-12-07 15:25:48 +0000 |
commit | ded93cd9e74a8cb2766f3a3f2ecaab59747c59e4 (patch) | |
tree | 8a6278cec83d284c97957bb6df5b9f2afcd30e17 /lib/libc/stdlib/at_quick_exit.3 | |
parent | c9b9c0a5a33422e64173fec02b4e0a586b146f11 (diff) | |
download | FreeBSD-src-ded93cd9e74a8cb2766f3a3f2ecaab59747c59e4.zip FreeBSD-src-ded93cd9e74a8cb2766f3a3f2ecaab59747c59e4.tar.gz |
Implement quick_exit() / at_quick_exit() from C++11 / C1x. Also add a
__noreturn macro and modify the other exiting functions to use it.
The __noreturn macro, unlike __dead2, must be used BEFORE the function.
This is in line with the C and C++ specifications that place _Noreturn (c1x)
and [[noreturn]] (C++11) in front of the functions. As with __dead2, this
macro falls back to using the GCC attribute.
Unfortunately, clang currently sets the same value for the C version macro
in C99 and C1x modes, so these functions are hidden by default. At some
point before 10.0, I need to go through the headers and clean up the C1x /
C++11 visibility.
Reviewed by: brooks (mentor)
Diffstat (limited to 'lib/libc/stdlib/at_quick_exit.3')
-rw-r--r-- | lib/libc/stdlib/at_quick_exit.3 | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/libc/stdlib/at_quick_exit.3 b/lib/libc/stdlib/at_quick_exit.3 new file mode 100644 index 0000000..241553f --- /dev/null +++ b/lib/libc/stdlib/at_quick_exit.3 @@ -0,0 +1,58 @@ +.\" Copyright (c) 2011 David Chisnall +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" / +.Dd December 7, 2011o.Dt ATEXIT 3 +.Dt AT_QUICK_EXIT 3 +.Os +.Sh NAME +.Nm at_quick_exit +.Nd Registers a cleanup function to run on quick exit. +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In stdlib.h +.Ft int +.Fn at_quick_exit "void (*func)(void)" +.Sh DESCRIPTION +The +.Fn at_quick_exit +function registers a cleanup function to be called when the program exits as a +result of calling +.Xr quick_exit 3 . +The cleanup functions are called in the reverse order and will not be called if +the program exits by calling +.Xr exit 3 , +.Xr _Exit 3 , +or +.Xr abort 3 . +.El +.Sh SEE ALSO +.Xr exit 3 , +.Xr at_quick_exit 3 +.Sh STANDARDS +The +.Fn at_quick_exit +function conforms to the C1x draft specification. |