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2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* Copyright (C) 2003-2021 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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/* Coldfire has no atomic compare-and-exchange operation, and the
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kernel provides no userspace atomicity operations. Here we just
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use generic non-atomic implementations instead. */
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typedef int8_t atomic8_t;
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typedef uint8_t uatomic8_t;
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typedef int_fast8_t atomic_fast8_t;
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typedef uint_fast8_t uatomic_fast8_t;
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typedef int16_t atomic16_t;
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typedef uint16_t uatomic16_t;
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typedef int_fast16_t atomic_fast16_t;
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typedef uint_fast16_t uatomic_fast16_t;
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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 int64_t atomic64_t;
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typedef uint64_t uatomic64_t;
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typedef int_fast64_t atomic_fast64_t;
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typedef uint_fast64_t uatomic_fast64_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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/* If we have just non-atomic operations, we can as well make them wide. */
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#define __HAVE_64B_ATOMICS 1
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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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({ __typeof (mem) __gmemp = (mem); \
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__typeof (*mem) __gret = *__gmemp; \
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__typeof (*mem) __gnewval = (newval); \
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\
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if (__gret == (oldval)) \
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*__gmemp = __gnewval; \
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__gret; })
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#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \
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({ __typeof (mem) __gmemp = (mem); \
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__typeof (*mem) __gnewval = (newval); \
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\
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*__gmemp == (oldval) ? (*__gmemp = __gnewval, 0) : 1; })
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#endif
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