| 1 | /* x86 internal rwlock struct definitions. |
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| 2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of the GNU C Library. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library; if not, see |
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| 18 | <http://www.gnu.org/licenses/>. */ |
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| 19 | |
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| 20 | #ifndef _RWLOCK_INTERNAL_H |
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| 21 | #define _RWLOCK_INTERNAL_H |
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| 22 | |
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| 23 | struct __pthread_rwlock_arch_t |
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| 24 | { |
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| 25 | unsigned int __readers; |
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| 26 | unsigned int __writers; |
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| 27 | unsigned int __wrphase_futex; |
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| 28 | unsigned int __writers_futex; |
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| 29 | unsigned int __pad3; |
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| 30 | unsigned int __pad4; |
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| 31 | #ifdef __x86_64__ |
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| 32 | int __cur_writer; |
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| 33 | int __shared; |
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| 34 | signed char __rwelision; |
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| 35 | # ifdef __ILP32__ |
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| 36 | unsigned char __pad1[3]; |
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| 37 | # define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0 } |
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| 38 | # else |
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| 39 | unsigned char __pad1[7]; |
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| 40 | # define 0, { 0, 0, 0, 0, 0, 0, 0 } |
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| 41 | # endif |
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| 42 | unsigned long int __pad2; |
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| 43 | /* FLAGS must stay at this position in the structure to maintain |
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| 44 | binary compatibility. */ |
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| 45 | unsigned int __flags; |
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| 46 | #else /* __x86_64__ */ |
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| 47 | /* FLAGS must stay at this position in the structure to maintain |
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| 48 | binary compatibility. */ |
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| 49 | unsigned char __flags; |
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| 50 | unsigned char __shared; |
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| 51 | signed char __rwelision; |
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| 52 | unsigned char __pad2; |
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| 53 | int __cur_writer; |
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| 54 | #endif |
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| 55 | }; |
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| 56 | |
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| 57 | #ifdef __x86_64__ |
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| 58 | # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ |
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| 59 | 0, 0, 0, 0, 0, 0, 0, 0, __PTHREAD_RWLOCK_ELISION_EXTRA, 0, __flags |
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| 60 | #else |
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| 61 | # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ |
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| 62 | 0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0 |
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| 63 | #endif |
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| 64 | |
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| 65 | #endif |
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| 66 | |
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