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
|
/* Basic platform-independent macro definitions for mutexes and
thread-specific data.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* One out of _LIBC, USE_PTHREADS, USE_THR or USE_SPROC should be
defined, otherwise the token NO_THREADS and dummy implementations
of the macros will be defined. */
#ifndef _THREAD_M_H
#define _THREAD_M_H
#if defined(_LIBC) /* The GNU C library, a special case of Posix threads */
#include <bits/libc-lock.h>
#ifdef PTHREAD_MUTEX_INITIALIZER
typedef pthread_t thread_id;
/* mutex */
typedef pthread_mutex_t mutex_t;
/* thread specific data */
typedef pthread_key_t tsd_key_t;
#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
static Void_t *malloc_key_data;
#define tsd_key_create(key, destr) \
if (__pthread_key_create != NULL) { \
__pthread_key_create(key, destr); \
} else { *(key) = (tsd_key_t) 0; }
#define tsd_setspecific(key, data) \
if (__pthread_setspecific != NULL) { \
__pthread_setspecific(key, data); \
} else { malloc_key_data = (Void_t *) data; }
#define tsd_getspecific(key, vptr) \
(vptr = (__pthread_getspecific != NULL \
? __pthread_getspecific(key) : malloc_key_data))
#define mutex_init(m) \
(__pthread_mutex_init != NULL ? __pthread_mutex_init (m, NULL) : 0)
#define mutex_lock(m) \
(__pthread_mutex_lock != NULL ? __pthread_mutex_lock (m) : 0)
#define mutex_trylock(m) \
(__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (m) : 0)
#define mutex_unlock(m) \
(__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (m) : 0)
#elif defined(MUTEX_INITIALIZER)
/* Assume hurd, with cthreads */
/* Cthreads `mutex_t' is a pointer to a mutex, and malloc wants just the
mutex itself. */
#undef mutex_t
#define mutex_t struct mutex
#undef mutex_lock
#define mutex_lock(m) (__mutex_lock(m), 0)
#undef mutex_unlock
#define mutex_unlock(m) (__mutex_unlock(m), 0)
#define mutex_trylock(m) (!__mutex_trylock(m))
#include <hurd/threadvar.h>
/* thread specific data */
typedef int tsd_key_t;
static int tsd_keys_alloced = 0;
#define tsd_key_create(key, destr) \
(assert (tsd_keys_alloced == 0), tsd_keys_alloced++)
#define tsd_setspecific(key, data) \
(*__hurd_threadvar_location (_HURD_THREADVAR_MALLOC) = (unsigned long)(data))
#define tsd_getspecific(key, vptr) \
((vptr) = (void *)*__hurd_threadvar_location (_HURD_THREADVAR_MALLOC))
/* No we're *not* using pthreads. */
#define __pthread_initialize ((void (*)(void))0)
#else
#define NO_THREADS
#endif /* MUTEX_INITIALIZER && PTHREAD_MUTEX_INITIALIZER */
#elif defined(USE_PTHREADS) /* Posix threads */
#include <pthread.h>
typedef pthread_t thread_id;
/* mutex */
typedef pthread_mutex_t mutex_t;
#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
#define mutex_init(m) pthread_mutex_init(m, NULL)
#define mutex_lock(m) pthread_mutex_lock(m)
#define mutex_trylock(m) pthread_mutex_trylock(m)
#define mutex_unlock(m) pthread_mutex_unlock(m)
/* thread specific data */
typedef pthread_key_t tsd_key_t;
#define tsd_key_create(key, destr) pthread_key_create(key, destr)
#define tsd_setspecific(key, data) pthread_setspecific(key, data)
#define tsd_getspecific(key, vptr) (vptr = pthread_getspecific(key))
#elif USE_THR /* Solaris threads */
#include <thread.h>
typedef thread_t thread_id;
#define MUTEX_INITIALIZER { 0 }
#define mutex_init(m) mutex_init(m, USYNC_THREAD, NULL)
/*
* Hack for thread-specific data on Solaris. We can't use thr_setspecific
* because that function calls malloc() itself.
*/
typedef void *tsd_key_t[256];
#define tsd_key_create(key, destr) do { \
int i; \
for(i=0; i<256; i++) (*key)[i] = 0; \
} while(0)
#define tsd_setspecific(key, data) (key[(unsigned)thr_self() % 256] = (data))
#define tsd_getspecific(key, vptr) (vptr = key[(unsigned)thr_self() % 256])
#elif USE_SPROC /* SGI sproc() threads */
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/prctl.h>
#include <abi_mutex.h>
typedef int thread_id;
typedef abilock_t mutex_t;
#define MUTEX_INITIALIZER { 0 }
#define mutex_init(m) init_lock(m)
#define mutex_lock(m) (spin_lock(m), 0)
#define mutex_trylock(m) acquire_lock(m)
#define mutex_unlock(m) release_lock(m)
typedef int tsd_key_t;
int tsd_key_next;
#define tsd_key_create(key, destr) ((*key) = tsd_key_next++)
#define tsd_setspecific(key, data) (((void **)(&PRDA->usr_prda))[key] = data)
#define tsd_getspecific(key, vptr) (vptr = ((void **)(&PRDA->usr_prda))[key])
#else /* no _LIBC or USE_... are defined */
#define NO_THREADS
#endif /* defined(_LIBC) */
#ifdef NO_THREADS /* No threads, provide dummy macros */
typedef int thread_id;
typedef int mutex_t;
#define MUTEX_INITIALIZER 0
#define mutex_init(m) (*(m) = 0)
#define mutex_lock(m) (0)
#define mutex_trylock(m) (0)
#define mutex_unlock(m) (0)
typedef void *tsd_key_t;
#define tsd_key_create(key, destr) do {} while(0)
#define tsd_setspecific(key, data) do {} while(0)
#define tsd_getspecific(key, vptr) (vptr = NULL)
#endif /* defined(NO_THREADS) */
#endif /* !defined(_THREAD_M_H) */
|
