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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/* Copyright (C) 2010-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _ATOMIC_MACHINE_H
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#define _ATOMIC_MACHINE_H 1
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#include <stdint.h>
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#include <sysdep.h>
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/* Coldfire has no atomic compare-and-exchange operation, but the
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kernel provides userspace atomicity operations. Use them. */
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typedef int32_t atomic32_t;
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typedef uint32_t uatomic32_t;
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typedef int_fast32_t atomic_fast32_t;
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typedef uint_fast32_t uatomic_fast32_t;
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typedef intptr_t atomicptr_t;
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typedef uintptr_t uatomicptr_t;
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typedef intmax_t atomic_max_t;
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typedef uintmax_t uatomic_max_t;
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#define __HAVE_64B_ATOMICS 0
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#define USE_ATOMIC_COMPILER_BUILTINS 0
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/* XXX Is this actually correct? */
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#define ATOMIC_EXCHANGE_USES_CAS 1
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/* The only basic operation needed is compare and exchange. */
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#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
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({ \
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/* Use temporary variables to workaround call-clobberness of \
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the registers. */ \
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__typeof (mem) _mem = mem; \
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__typeof (oldval) _oldval = oldval; \
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__typeof (newval) _newval = newval; \
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register uint32_t _d0 asm ("d0") = SYS_ify (atomic_cmpxchg_32); \
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register uint32_t *_a0 asm ("a0") = (uint32_t *) _mem; \
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register uint32_t _d2 asm ("d2") = (uint32_t) _oldval; \
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register uint32_t _d1 asm ("d1") = (uint32_t) _newval; \
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\
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asm ("trap #0" \
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: "+d" (_d0), "+m" (*_a0) \
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: "a" (_a0), "d" (_d2), "d" (_d1)); \
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(__typeof (oldval)) _d0; \
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})
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# define atomic_full_barrier() \
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(INTERNAL_SYSCALL_CALL (atomic_barrier), (void) 0)
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#endif
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