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5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/* Low-level lock implementation. Mach gsync-based version.
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Copyright (C) 1994-2019 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 _MACH_LOWLEVELLOCK_H
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#define _MACH_LOWLEVELLOCK_H 1
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#include <mach/gnumach.h>
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#include <atomic.h>
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/* Gsync flags. */
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#ifndef GSYNC_SHARED
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# define GSYNC_SHARED 0x01
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# define GSYNC_QUAD 0x02
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# define GSYNC_TIMED 0x04
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# define GSYNC_BROADCAST 0x08
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# define GSYNC_MUTATE 0x10
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#endif
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/* Static initializer for low-level locks. */
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#define LLL_INITIALIZER 0
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/* Wait on address PTR, without blocking if its contents
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* are different from VAL. */
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#define lll_wait(ptr, val, flags) \
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__gsync_wait (__mach_task_self (), \
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(vm_offset_t)(ptr), (val), 0, 0, (flags))
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/* Wake one or more threads waiting on address PTR. */
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#define lll_wake(ptr, flags) \
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__gsync_wake (__mach_task_self (), (vm_offset_t)(ptr), 0, (flags))
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/* Acquire the lock at PTR. */
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#define lll_lock(ptr, flags) \
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({ \
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int *__iptr = (int *)(ptr); \
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int __flags = (flags); \
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if (*__iptr != 0 \
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|| atomic_compare_and_exchange_bool_acq (__iptr, 1, 0) != 0) \
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while (1) \
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{ \
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if (atomic_exchange_acq (__iptr, 2) == 0) \
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break; \
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lll_wait (__iptr, 2, __flags); \
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} \
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(void)0; \
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})
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/* Try to acquire the lock at PTR, without blocking.
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Evaluates to zero on success. */
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#define lll_trylock(ptr) \
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({ \
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int *__iptr = (int *)(ptr); \
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*__iptr == 0 \
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&& atomic_compare_and_exchange_bool_acq (__iptr, 1, 0) == 0 ? 0 : -1; \
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})
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/* Release the lock at PTR. */
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#define lll_unlock(ptr, flags) \
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({ \
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int *__iptr = (int *)(ptr); \
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if (atomic_exchange_rel (__iptr, 0) == 2) \
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lll_wake (__iptr, (flags)); \
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(void)0; \
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})
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#endif
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