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/* Defintions for lowlevel handling in ld.so.
Copyright (C) 2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _RTLD_LOWLEVEL_H
#define _RTLD_LOWLEVEL_H 1
#include <atomic.h>
#include <lowlevellock.h>
/* Function to wait for variable become zero. Used in ld.so for
reference counters. */
#define __rtld_waitzero(word) \
do { \
while (1) \
{ \
int val = word; \
if (val == 0) \
break; \
lll_futex_wait (&(word), val, LLL_PRIVATE); \
} \
} while (0)
#define __rtld_notify(word) \
lll_futex_wake (&(word), 1, LLL_PRIVATE)
#endif
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