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
|
/*
* oplthr.h
*
* $Id: oplthr.h,v 1.1.1.1 2006/04/11 17:56:16 source Exp $
*
* Macros for locking & multihreading
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#ifndef _OPLTHR_H
#define _OPLTHR_H
/*
* NOTES:
* OPL_THREADING is defined if building in multi threaded environment
*
* OLD_THREAD_IDENT (if defined) returns an identifier for the
* current thread - only for debugging
*
* The OPL_MUTEX_... and OPL_SPINLOCK_... macros are pretty straightforward,
* no error checking is done
*/
/*
* Threading in Virtuoso
*
* Disabled to avoid circular dependency between util, Dk and Thread libs
* Now we just use OS native mutex calls.
*/
#if 0 /* Originally: _DKTHREAD_H */
#define OPL_THREADING
# define OPL_MUTEX_DECLARE(M) dk_mutex_t *M
# define OPL_MUTEX_INIT(M) M = mutex_allocate ()
# define OPL_MUTEX_DONE(M) mutex_free (M)
# define OPL_MUTEX_LOCK(M) mutex_enter (M)
# define OPL_MUTEX_UNLOCK(M) mutex_leave (M)
# define OPL_SPINLOCK_DECLARE(M) spinlock_t *M
# define OPL_SPINLOCK_INIT(M) M = spinlock_allocate ()
# define OPL_SPINLOCK_DONE(M) spinlock_free (M)
# define OPL_SPINLOCK_LOCK(M) spinlock_enter (M)
# define OPL_SPINLOCK_UNLOCK(M) spinlock_leave (M)
# define OPL_SEMAPHORE_DECLARE(M) semaphore_t *M
# define OPL_SEMAPHORE_INIT(M,V,MX) M = semaphore_allocate (V)
# define OPL_SEMAPHORE_DONE(M) semaphore_free (M)
# define OPL_SEMAPHORE_WAIT(M) semaphore_enter (M)
# define OPL_SEMAPHORE_TRYWAIT(M) (semaphore_try_enter (M) ? 0 : -1)
# define OPL_SEMAPHORE_SIGNAL(M) semaphore_leave (M)
/*
* Threading under windows
*/
#elif defined (WIN32) && !defined (NO_THREADING)
# define OPL_THREADING
# define OPL_THREAD_IDENT GetCurrentThreadId ()
# define OPL_MUTEX_DECLARE(M) HANDLE M
# define OPL_MUTEX_INIT(M) M = CreateMutex (NULL, FALSE, NULL)
# define OPL_MUTEX_DONE(M) CloseHandle (M)
# define OPL_MUTEX_LOCK(M) WaitForSingleObject (M, INFINITE)
# define OPL_MUTEX_UNLOCK(M) ReleaseMutex (M)
# define OPL_SPINLOCK_DECLARE(M) CRITICAL_SECTION M
# define OPL_SPINLOCK_INIT(M) InitializeCriticalSection (&M)
# define OPL_SPINLOCK_DONE(M) DeleteCriticalSection (&M)
# define OPL_SPINLOCK_LOCK(M) EnterCriticalSection (&M)
# define OPL_SPINLOCK_UNLOCK(M) LeaveCriticalSection (&M)
# define OPL_SEMAPHORE_DECLARE(M) HANDLE M
# define OPL_SEMAPHORE_INIT(M,V,MX) M = CreateSemaphore (NULL, V, MX, NULL)
# define OPL_SEMAPHORE_DONE(M) CloseHandle (M)
# define OPL_SEMAPHORE_TRYWAIT(M) (WaitForSingleObject (M, 0) == WAIT_OBJECT_0 ? 0 : -1)
# define OPL_SEMAPHORE_WAIT(M) WaitForSingleObject (M, INFINITE)
# define OPL_SEMAPHORE_SIGNAL(M) ReleaseSemaphore (M, 1, NULL)
/*
* Threading with pthreads
*/
#elif defined (WITH_PTHREADS) && !defined (NO_THREADING)
#ifndef _REENTRANT
# error Add -D_REENTRANT to your compiler flags
#endif
#include <pthread.h>
#ifdef PTHREAD_NATIVE_SEMAPHORES
# include <semaphore.h>
#else
typedef struct
{
pthread_mutex_t mtx;
pthread_cond_t cond;
int count;
int max;
} oplsem_t;
BEGIN_CPLUSPLUS
int OPL_sema_init (oplsem_t *psema, int count, int max);
int OPL_sema_done (oplsem_t *psema);
int OPL_sema_signal (oplsem_t *psema);
int OPL_sema_wait (oplsem_t *psema);
END_CPLUSPLUS
#endif
#define OPL_THREADING
# define OPL_MUTEX_DECLARE(M) pthread_mutex_t M
# ifndef OLD_PTHREADS
# define OPL_THREAD_IDENT ((long) (pthread_self ()))
# define OPL_MUTEX_INIT(M) pthread_mutex_init (&M, NULL)
# else
# undef OPL_THREAD_IDENT
# define OPL_MUTEX_INIT(M) pthread_mutex_init (&M, pthread_mutexattr_default)
# endif
# define OPL_MUTEX_DONE(M) pthread_mutex_destroy (&M)
# define OPL_MUTEX_LOCK(M) pthread_mutex_lock (&M)
# define OPL_MUTEX_UNLOCK(M) pthread_mutex_unlock (&M)
# define OPL_SPINLOCK_DECLARE(M) OPL_MUTEX_DECLARE (M)
# define OPL_SPINLOCK_INIT(M) OPL_MUTEX_INIT (M)
# define OPL_SPINLOCK_DONE(M) OPL_MUTEX_DONE (M)
# define OPL_SPINLOCK_LOCK(M) OPL_MUTEX_LOCK (M)
# define OPL_SPINLOCK_UNLOCK(M) OPL_MUTEX_UNLOCK (M)
#ifdef PTHREAD_NATIVE_SEMAPHORES
# define OPL_SEMAPHORE_DECLARE(M) sem_t M
# define OPL_SEMAPHORE_INIT(M,V,MX) sem_init (&M, 0, V)
# define OPL_SEMAPHORE_DONE(M) sem_destroy (&M)
# define OPL_SEMAPHORE_WAIT(M) sem_wait (&M)
# define OPL_SEMAPHORE_TRYWAIT(M) sem_trywait (&M)
# define OPL_SEMAPHORE_SIGNAL(M) sem_post (&M)
#else
# define OPL_SEMAPHORE_DECLARE(M) oplsem_t M
# define OPL_SEMAPHORE_INIT(M,V,MX) OPL_sema_init (&M, V, MX)
# define OPL_SEMAPHORE_DONE(M) OPL_sema_done (&M)
# define OPL_SEMAPHORE_WAIT(M) OPL_sema_wait (&M)
# define OPL_SEMAPHORE_TRYWAIT(M) OPL_sema_wait (&M)
# define OPL_SEMAPHORE_SIGNAL(M) OPL_sema_signal (&M)
#endif
/*
* No threading
*/
#else
# undef OPL_THREADING
# undef OPL_THREAD_IDENT
# define OPL_MUTEX_DECLARE(M) int M
# define OPL_MUTEX_INIT(M) M = 1
# define OPL_MUTEX_DONE(M) M = 1
# define OPL_MUTEX_LOCK(M) M = 1
# define OPL_MUTEX_UNLOCK(M) M = 1
# define OPL_SPINLOCK_DECLARE(M) OPL_MUTEX_DECLARE (M)
# define OPL_SPINLOCK_INIT(M) OPL_MUTEX_INIT (M)
# define OPL_SPINLOCK_DONE(M) OPL_MUTEX_DONE (M)
# define OPL_SPINLOCK_LOCK(M) OPL_MUTEX_LOCK (M)
# define OPL_SPINLOCK_UNLOCK(M) OPL_MUTEX_UNLOCK (M)
# define OPL_SEMAPHORE_DECLARE(M) OPL_MUTEX_DECLARE (M)
# define OPL_SEMAPHORE_INIT(M,V,MX) OPL_MUTEX_INIT (M)
# define OPL_SEMAPHORE_DONE(M) OPL_MUTEX_DONE (M)
# define OPL_SEMAPHORE_WAIT(M) abort()
# define OPL_SEMAPHORE_TRYWAIT(M) abort()
# define OPL_SEMAPHORE_SIGNAL(M)
# define OPL_THREAD_IDENT 0
#endif
#ifndef _DKTHREAD_H /* Virtuoso already defines these */
#define thread_t opl_thread_t
#define thread_create OPL_thread_create
#define thread_exit OPL_thread_exit
typedef struct thread_s thread_t;
BEGIN_CPLUSPLUS
typedef int (*thread_init_func) (void *arg);
thread_t *thread_create (thread_init_func init, unsigned long stack_size, void *init_arg);
void thread_exit (int n);
END_CPLUSPLUS
#endif /* _DKTHREAD_H */
#endif
|
