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50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/* Copyright (C) 2011-2019 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Transactional Memory Library (libitm).
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Libitm is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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namespace GTM HIDDEN {
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typedef struct gtm_jmpbuf
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{
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unsigned long long vfp[8]; /* d8-d15 */
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unsigned long long iwmmxt[6]; /* cr10-cr15 */
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unsigned long gr[8]; /* r4-r11 */
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void *cfa;
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unsigned long pc;
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} gtm_jmpbuf;
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/* ??? The size of one line in hardware caches (in bytes). */
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#define HW_CACHELINE_SIZE 64
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static inline void
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cpu_relax (void)
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{
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/* ??? The kernel uses the condition
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#if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327)
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Given that we're actually just waiting, it doesn't seem like it
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hurts to simply use a full barrier all the time. */
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__sync_synchronize ();
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}
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} // namespace GTM
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