]>
Commit | Line | Data |
---|---|---|
7df8af43 | 1 | /* HPPA internal rwlock struct definitions. |
6d7e8eda | 2 | Copyright (C) 2019-2023 Free Software Foundation, Inc. |
7df8af43 AZ |
3 | |
4 | This file is part of the GNU C Library. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifndef _RWLOCK_INTERNAL_H | |
21 | #define _RWLOCK_INTERNAL_H | |
22 | ||
23 | struct __pthread_rwlock_arch_t | |
24 | { | |
25 | /* In the old Linuxthreads pthread_rwlock_t, this is the | |
26 | start of the 4-word 16-byte aligned lock structure. The | |
27 | next four words are all set to 1 by the Linuxthreads | |
28 | PTHREAD_RWLOCK_INITIALIZER. We ignore them in NPTL. */ | |
29 | int __compat_padding[4] __attribute__ ((__aligned__(16))); | |
30 | unsigned int __readers; | |
31 | unsigned int __writers; | |
32 | unsigned int __wrphase_futex; | |
33 | unsigned int __writers_futex; | |
34 | unsigned int __pad3; | |
35 | unsigned int __pad4; | |
36 | int __cur_writer; | |
37 | /* An unused word, reserved for future use. It was added | |
38 | to maintain the location of the flags from the Linuxthreads | |
39 | layout of this structure. */ | |
40 | int __reserved1; | |
41 | /* FLAGS must stay at this position in the structure to maintain | |
42 | binary compatibility. */ | |
43 | unsigned char __pad2; | |
44 | unsigned char __pad1; | |
45 | unsigned char __shared; | |
46 | unsigned char __flags; | |
47 | /* The NPTL pthread_rwlock_t is 4 words smaller than the | |
48 | Linuxthreads version. One word is in the middle of the | |
49 | structure, the other three are at the end. */ | |
50 | int __reserved2; | |
51 | int __reserved3; | |
52 | int __reserved4; | |
53 | }; | |
54 | ||
55 | #define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ | |
56 | { 0, 0, 0, 0 }, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, __flags, 0, 0, 0 | |
57 | ||
58 | #endif |