1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* Copyright (C) 2005-2016 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 _BITS_PTHREADTYPES_H
#define _BITS_PTHREADTYPES_H 1
/* Linuxthread type sizes (bytes):
sizeof(pthread_attr_t) = 0x24 (36)
sizeof(pthread_barrier_t) = 0x30 (48)
sizeof(pthread_barrierattr_t) = 0x4 (4)
sizeof(pthread_cond_t) = 0x30 (48)
sizeof(pthread_condattr_t) = 0x4 (4)
sizeof(pthread_mutex_t) = 0x30 (48)
sizeof(pthread_mutexattr_t) = 0x4 (4)
sizeof(pthread_rwlock_t) = 0x40 (64)
sizeof(pthread_rwlockattr_t) = 0x8 (8)
sizeof(pthread_spinlock_t) = 0x10 (16) */
#define __SIZEOF_PTHREAD_ATTR_T 36
#define __SIZEOF_PTHREAD_BARRIER_T 48
#define __SIZEOF_PTHREAD_BARRIERATTR_T 4
#define __SIZEOF_PTHREAD_COND_T 48
#define __SIZEOF_PTHREAD_CONDATTR_T 4
#define __SIZEOF_PTHREAD_MUTEX_T 48
#define __SIZEOF_PTHREAD_MUTEXATTR_T 4
#define __SIZEOF_PTHREAD_RWLOCK_T 64
#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
/* Thread identifiers. The structure of the attribute type is not
exposed on purpose. */
typedef unsigned long int pthread_t;
union pthread_attr_t
{
char __size[__SIZEOF_PTHREAD_ATTR_T];
long int __align;
};
#ifndef __have_pthread_attr_t
typedef union pthread_attr_t pthread_attr_t;
# define __have_pthread_attr_t 1
#endif
typedef struct __pthread_internal_slist
{
struct __pthread_internal_slist *__next;
} __pthread_slist_t;
/* Data structures for mutex handling. The structure of the attribute
type is not exposed on purpose. */
typedef union
{
struct __pthread_mutex_s
{
int __lock __attribute__ ((__aligned__(16)));
unsigned int __count;
int __owner;
/* KIND must stay at this position in the structure to maintain
binary compatibility. */
int __kind;
/* The old 4-word 16-byte aligned lock. This is initalized
to all ones by the Linuxthreads PTHREAD_MUTEX_INITIALIZER.
Unused in NPTL. */
int __compat_padding[4];
/* In the old structure there are 4 words left due to alignment.
In NPTL two words are used. */
unsigned int __nusers;
__extension__ union
{
int __spins;
__pthread_slist_t __list;
};
/* Two more words are left before the NPTL
pthread_mutex_t is larger than Linuxthreads. */
int __reserved1;
int __reserved2;
} __data;
char __size[__SIZEOF_PTHREAD_MUTEX_T];
long int __align;
} pthread_mutex_t;
/* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */
#define __PTHREAD_SPINS 0
typedef union
{
char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
long int __align;
} pthread_mutexattr_t;
/* Data structure for conditional variable handling. The structure of
the attribute type is not exposed on purpose. However, this structure
is exposed via PTHREAD_COND_INITIALIZER, and because of this, the
Linuxthreads version sets the first four ints to one. In the NPTL
version we must check, in every function using pthread_cond_t,
for the static Linuxthreads initializer and clear the appropriate
words. */
typedef union
{
struct
{
/* In the old Linuxthreads pthread_cond_t, this is the
start of the 4-word lock structure, the next four words
are set all to 1 by the Linuxthreads
PTHREAD_COND_INITIALIZER. */
int __lock __attribute__ ((__aligned__(16)));
/* Tracks the initialization of this structure:
0 initialized with NPTL PTHREAD_COND_INITIALIZER.
1 initialized with Linuxthreads PTHREAD_COND_INITIALIZER.
2 initialization in progress. */
int __initializer;
unsigned int __futex;
void *__mutex;
/* In the old Linuxthreads this would have been the start
of the pthread_fastlock status word. */
__extension__ unsigned long long int __total_seq;
__extension__ unsigned long long int __wakeup_seq;
__extension__ unsigned long long int __woken_seq;
unsigned int __nwaiters;
unsigned int __broadcast_seq;
/* The NPTL pthread_cond_t is exactly the same size as
the Linuxthreads version, there are no words to spare. */
} __data;
char __size[__SIZEOF_PTHREAD_COND_T];
__extension__ long long int __align;
} pthread_cond_t;
typedef union
{
char __size[__SIZEOF_PTHREAD_CONDATTR_T];
long int __align;
} pthread_condattr_t;
/* Keys for thread-specific data */
typedef unsigned int pthread_key_t;
/* Once-only execution */
typedef int pthread_once_t;
#if defined __USE_UNIX98 || defined __USE_XOPEN2K
/* Data structure for read-write lock variable handling. The
structure of the attribute type is not exposed on purpose. */
typedef union
{
struct
{
/* In the old Linuxthreads pthread_rwlock_t, this is the
start of the 4-word 16-byte aligned lock structure. The
next four words are all set to 1 by the Linuxthreads
PTHREAD_RWLOCK_INITIALIZER. We ignore them in NPTL. */
int __compat_padding[4] __attribute__ ((__aligned__(16)));
int __lock;
unsigned int __nr_readers;
unsigned int __readers_wakeup;
unsigned int __writer_wakeup;
unsigned int __nr_readers_queued;
unsigned int __nr_writers_queued;
int __writer;
/* An unused word, reserved for future use. It was added
to maintain the location of the flags from the Linuxthreads
layout of this structure. */
int __reserved1;
/* FLAGS must stay at this position in the structure to maintain
binary compatibility. */
unsigned char __pad2;
unsigned char __pad1;
unsigned char __shared;
unsigned char __flags;
/* The NPTL pthread_rwlock_t is 4 words smaller than the
Linuxthreads version. One word is in the middle of the
structure, the other three are at the end. */
int __reserved2;
int __reserved3;
int __reserved4;
} __data;
char __size[__SIZEOF_PTHREAD_RWLOCK_T];
long int __align;
} pthread_rwlock_t;
#define __PTHREAD_RWLOCK_ELISION_EXTRA 0
typedef union
{
char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
long int __align;
} pthread_rwlockattr_t;
#endif
#ifdef __USE_XOPEN2K
/* POSIX spinlock data type. */
typedef volatile int pthread_spinlock_t;
/* POSIX barriers data type. The structure of the type is
deliberately not exposed. */
typedef union
{
char __size[__SIZEOF_PTHREAD_BARRIER_T];
long int __align;
} pthread_barrier_t;
typedef union
{
char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
int __align;
} pthread_barrierattr_t;
#endif
#endif /* bits/pthreadtypes.h */
|
