mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-20 11:59:23 +08:00
3d7c150e3f
2003-07-04 Benjamin Kosnik <bkoz@redhat.com> Move from CPP to CXX. * include/bits/c++config: Move to GLIBCXX from GLIBCPP. * testsuite/Makefile.am: Same. * testsuite/Makefile.in: Regenerate. * po/Makefile.am: Same. * po/Makefile.in: Regenerate. * libsupc++/Makefile.am: Same. * libsupc++/Makefile.in: Regenerate. * libmath/Makefile.am: Same. * libmath/Makefile.in: Regenerate. * include/Makefile.am: Same. * include/Makefile.in: Regenerate. * src/Makefile.am: Same. * src/Makefile.in: Regenerate. * acconfig.h: Same. * configure.host: Same. * configure.in: Same. * configure: Regenerate. * acinclude.m4: Same. * aclocal.m4: Same. * src: Change all files in this directory. * testsuite: Same. * include: Same, standardize include guards. * config: Same. * libsupc++: Same. From-SVN: r68958
61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
// Low-level functions for atomic operations: S/390 version -*- C++ -*-
|
|
|
|
// Copyright (C) 2001 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 2, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License along
|
|
// with this library; see the file COPYING. If not, write to the Free
|
|
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
|
// USA.
|
|
|
|
// As a special exception, you may use this file as part of a free software
|
|
// library without restriction. Specifically, if other files instantiate
|
|
// templates or use macros or inline functions from this file, or you compile
|
|
// this file and link it with other files to produce an executable, this
|
|
// file does not by itself cause the resulting executable to be covered by
|
|
// the GNU General Public License. This exception does not however
|
|
// invalidate any other reasons why the executable file might be covered by
|
|
// the GNU General Public License.
|
|
|
|
#ifndef _GLIBCXX_ATOMICITY_H
|
|
#define _GLIBCXX_ATOMICITY_H 1
|
|
|
|
typedef int _Atomic_word;
|
|
|
|
static inline _Atomic_word
|
|
__attribute__ ((__unused__))
|
|
__exchange_and_add (volatile _Atomic_word *__mem, int __val)
|
|
{
|
|
register _Atomic_word __old_val, __new_val;
|
|
|
|
__asm__ __volatile__ (" l %0,0(%2)\n"
|
|
"0: lr %1,%0\n"
|
|
" ar %1,%3\n"
|
|
" cs %0,%1,0(%2)\n"
|
|
" jl 0b"
|
|
: "=&d" (__old_val), "=&d" (__new_val)
|
|
: "a" (__mem), "d" (__val) : "cc", "memory" );
|
|
return __old_val;
|
|
}
|
|
|
|
static inline void
|
|
__attribute__ ((__unused__))
|
|
__atomic_add (volatile _Atomic_word *__mem, int __val)
|
|
{
|
|
__exchange_and_add (__mem, __val);
|
|
}
|
|
|
|
#endif /* atomicity.h */
|
|
|
|
|