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1100f849 | 1 | /* Defintions for lowlevel handling in ld.so. |
835abc5c | 2 | Copyright (C) 2006, 2007 Free Software Foundation, Inc. |
1100f849 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
1100f849 UD |
18 | |
19 | #ifndef _RTLD_LOWLEVEL_H | |
20 | #define _RTLD_LOWLEVEL_H 1 | |
21 | ||
22 | #include <atomic.h> | |
23 | #include <lowlevellock.h> | |
24 | ||
25 | ||
1100f849 UD |
26 | /* Function to wait for variable become zero. Used in ld.so for |
27 | reference counters. */ | |
28 | #define __rtld_waitzero(word) \ | |
29 | do { \ | |
30 | while (1) \ | |
31 | { \ | |
32 | int val = word; \ | |
33 | if (val == 0) \ | |
34 | break; \ | |
085a4412 | 35 | lll_futex_wait (&(word), val, LLL_PRIVATE); \ |
1100f849 UD |
36 | } \ |
37 | } while (0) | |
38 | ||
39 | ||
40 | #define __rtld_notify(word) \ | |
085a4412 | 41 | lll_futex_wake (&(word), 1, LLL_PRIVATE) |
1100f849 UD |
42 | |
43 | #endif |