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44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* Defintions for lowlevel handling in ld.so.
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Copyright (C) 2006-2013 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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<http://www.gnu.org/licenses/>. */
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#ifndef _RTLD_LOWLEVEL_H
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#define _RTLD_LOWLEVEL_H 1
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#include <atomic.h>
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#include <lowlevellock.h>
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/* Function to wait for variable become zero. Used in ld.so for
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reference counters. */
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#define __rtld_waitzero(word) \
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do { \
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while (1) \
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{ \
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int val = word; \
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if (val == 0) \
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break; \
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lll_futex_wait (&(word), val, LLL_PRIVATE); \
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} \
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} while (0)
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#define __rtld_notify(word) \
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lll_futex_wake (&(word), 1, LLL_PRIVATE)
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#endif
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