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40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
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/* Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include "pthreadP.h"
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int
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pthread_spin_lock (pthread_spinlock_t *lock)
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{
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__asm __volatile
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("1: ldstub [%0], %%g2\n"
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" brnz,pn %%g2, 2f\n"
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" membar #StoreLoad | #StoreStore\n"
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".subsection 2\n"
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"2: ldub [%0], %%g2\n"
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" brnz,pt %%g2, 2b\n"
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" membar #LoadLoad\n"
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" b,a,pt %%xcc, 1b\n"
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".previous"
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: /* no outputs */
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: "r" (lock)
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: "g2", "memory");
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return 0;
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}
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