1/* Common threading primitives definitions for both POSIX and C11. 
2 Copyright (C) 2017-2022 Free Software Foundation, Inc. 
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 
16 License along with the GNU C Library; if not, see 
17 <https://www.gnu.org/licenses/>. */ 
18 
19#ifndef _THREAD_SHARED_TYPES_H 
20#define _THREAD_SHARED_TYPES_H 1 
21 
22/* Arch-specific definitions. Each architecture must define the following 
23 macros to define the expected sizes of pthread data types: 
24 
25 __SIZEOF_PTHREAD_ATTR_T - size of pthread_attr_t. 
26 __SIZEOF_PTHREAD_MUTEX_T - size of pthread_mutex_t. 
27 __SIZEOF_PTHREAD_MUTEXATTR_T - size of pthread_mutexattr_t. 
28 __SIZEOF_PTHREAD_COND_T - size of pthread_cond_t. 
29 __SIZEOF_PTHREAD_CONDATTR_T - size of pthread_condattr_t. 
30 __SIZEOF_PTHREAD_RWLOCK_T - size of pthread_rwlock_t. 
31 __SIZEOF_PTHREAD_RWLOCKATTR_T - size of pthread_rwlockattr_t. 
32 __SIZEOF_PTHREAD_BARRIER_T - size of pthread_barrier_t. 
33 __SIZEOF_PTHREAD_BARRIERATTR_T - size of pthread_barrierattr_t. 
34 
35 The additional macro defines any constraint for the lock alignment 
36 inside the thread structures: 
37 
38 __LOCK_ALIGNMENT - for internal lock/futex usage. 
39 
40 Same idea but for the once locking primitive: 
41 
42 __ONCE_ALIGNMENT - for pthread_once_t/once_flag definition. */ 
43 
44#include <bits/pthreadtypes-arch.h> 
45 
46#include <bits/atomic_wide_counter.h> 
47 
48 
49/* Common definition of pthread_mutex_t. */ 
50 
51typedef struct __pthread_internal_list 
52{ 
53 struct __pthread_internal_list *__prev; 
54 struct __pthread_internal_list *__next; 
55} __pthread_list_t; 
56 
57typedef struct __pthread_internal_slist 
58{ 
59 struct __pthread_internal_slist *__next; 
60} __pthread_slist_t; 
61 
62/* Arch-specific mutex definitions. A generic implementation is provided 
63 by sysdeps/nptl/bits/struct_mutex.h. If required, an architecture 
64 can override it by defining: 
65 
66 1. struct __pthread_mutex_s (used on both pthread_mutex_t and mtx_t 
67 definition). It should contains at least the internal members 
68 defined in the generic version. 
69 
70 2. __LOCK_ALIGNMENT for any extra attribute for internal lock used with 
71 atomic operations. 
72 
73 3. The macro __PTHREAD_MUTEX_INITIALIZER used for static initialization. 
74 It should initialize the mutex internal flag. */ 
75 
76#include <bits/struct_mutex.h> 
77 
78/* Arch-sepecific read-write lock definitions. A generic implementation is 
79 provided by struct_rwlock.h. If required, an architecture can override it 
80 by defining: 
81 
82 1. struct __pthread_rwlock_arch_t (used on pthread_rwlock_t definition). 
83 It should contain at least the internal members defined in the 
84 generic version. 
85 
86 2. The macro __PTHREAD_RWLOCK_INITIALIZER used for static initialization. 
87 It should initialize the rwlock internal type. */ 
88 
89#include <bits/struct_rwlock.h> 
90 
91 
92/* Common definition of pthread_cond_t. */ 
93 
94struct __pthread_cond_s 
95{ 
96 __atomic_wide_counter __wseq; 
97 __atomic_wide_counter __g1_start; 
98 unsigned int __g_refs[2] __LOCK_ALIGNMENT; 
99 unsigned int __g_size[2]; 
100 unsigned int __g1_orig_size; 
101 unsigned int __wrefs; 
102 unsigned int __g_signals[2]; 
103}; 
104 
105typedef unsigned int __tss_t; 
106typedef unsigned long int __thrd_t; 
107 
108typedef struct 
109{ 
110 int __data __ONCE_ALIGNMENT; 
111} __once_flag; 
112 
113#define __ONCE_FLAG_INIT { 0 } 
114 
115#endif /* _THREAD_SHARED_TYPES_H */ 
116