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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2010-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
/*
* Description: Native atomics ethread support using libatomic_ops
* Author: Rickard Green
*/
#ifndef ETHR_LIBATOMIC_OPS_ATOMIC_H__
#define ETHR_LIBATOMIC_OPS_ATOMIC_H__
/*
* libatomic_ops can be downloaded from:
* http://www.hpl.hp.com/research/linux/atomic_ops/
*
* These operations need to be defined by libatomic_ops;
* otherwise, we won't compile:
* - AO_nop_full()
* - AO_load()
* - AO_store()
* - AO_compare_and_swap()
*
*/
#if ETHR_SIZEOF_AO_T == 4
#define ETHR_HAVE_NATIVE_ATOMIC32 1
#define ETHR_NATIVE_ATOMIC32_IMPL "libatomic_ops"
#define ETHR_NATMC_FUNC__(X) ethr_native_atomic32_ ## X
#define ETHR_ATMC_T__ ethr_native_atomic32_t
#define ETHR_AINT_T__ ethr_sint32_t
#define ETHR_AINT_SUFFIX__ "l"
#elif ETHR_SIZEOF_AO_T == 8
#define ETHR_HAVE_NATIVE_ATOMIC64 1
#define ETHR_NATIVE_ATOMIC64_IMPL "libatomic_ops"
#define ETHR_NATMC_FUNC__(X) ethr_native_atomic64_ ## X
#define ETHR_ATMC_T__ ethr_native_atomic64_t
#define ETHR_AINT_T__ ethr_sint64_t
#define ETHR_AINT_SUFFIX__ "q"
#else
#error "Unsupported integer size"
#endif
typedef struct {
volatile AO_t counter;
} ETHR_ATMC_T__;
#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_ATOMIC_IMPL__)
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_ADDR 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_ADDR 1
#endif
static ETHR_INLINE ETHR_AINT_T__ *
ETHR_NATMC_FUNC__(addr)(ETHR_ATMC_T__ *var)
{
return (ETHR_AINT_T__ *) &var->counter;
}
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_SET 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_SET 1
#endif
static ETHR_INLINE void
ETHR_NATMC_FUNC__(set)(ETHR_ATMC_T__ *var, ETHR_AINT_T__ value)
{
AO_store(&var->counter, (AO_t) value);
}
#ifdef AO_HAVE_store_release
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_SET_RELB 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_SET_RELB 1
#endif
static ETHR_INLINE void
ETHR_NATMC_FUNC__(set_relb)(ETHR_ATMC_T__ *var, ETHR_AINT_T__ value)
{
AO_store_release(&var->counter, (AO_t) value);
}
#endif
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_READ 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_READ 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(read)(ETHR_ATMC_T__ *var)
{
return (ETHR_AINT_T__) AO_load(&var->counter);
}
#ifdef AO_HAVE_load_acquire
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_READ_ACQB 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_READ_ACQB 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(read_acqb)(ETHR_ATMC_T__ *var)
{
return (ETHR_AINT_T__) AO_load_acquire(&var->counter);
}
#endif
#ifdef AO_HAVE_fetch_and_add
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_ADD_RETURN 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_ADD_RETURN 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(add_return)(ETHR_ATMC_T__ *var, ETHR_AINT_T__ incr)
{
return ((ETHR_AINT_T__) AO_fetch_and_add(&var->counter, (AO_t) incr)) + incr;
}
#endif
#ifdef AO_HAVE_fetch_and_add1
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_INC_RETURN 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_INC_RETURN 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(inc_return)(ETHR_ATMC_T__ *var)
{
return ((ETHR_AINT_T__) AO_fetch_and_add1(&var->counter)) + 1;
}
#endif
#ifdef AO_HAVE_fetch_and_add1_acquire
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_INC_RETURN_ACQB 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_INC_RETURN_ACQB 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(inc_return_acqb)(ETHR_ATMC_T__ *var)
{
return ((ETHR_AINT_T__) AO_fetch_and_add1_acquire(&var->counter)) + 1;
}
#endif
#ifdef AO_HAVE_fetch_and_sub1
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_DEC_RETURN 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_DEC_RETURN 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(dec_return)(ETHR_ATMC_T__ *var)
{
return ((ETHR_AINT_T__) AO_fetch_and_sub1(&var->counter)) - 1;
}
#endif
#ifdef AO_HAVE_fetch_and_sub1_release
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_DEC_RETURN_RELB 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_DEC_RETURN_RELB 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(dec_return_relb)(ETHR_ATMC_T__ *var)
{
return ((ETHR_AINT_T__) AO_fetch_and_sub1_release(&var->counter)) - 1;
}
#endif
#ifdef AO_HAVE_compare_and_swap
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_CMPXCHG 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_CMPXCHG 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(cmpxchg)(ETHR_ATMC_T__ *var,
ETHR_AINT_T__ new,
ETHR_AINT_T__ exp)
{
ETHR_AINT_T__ act;
do {
if (AO_compare_and_swap(&var->counter, (AO_t) exp, (AO_t) new))
return exp;
act = (ETHR_AINT_T__) AO_load(&var->counter);
} while (act == exp);
return act;
}
#endif
#ifdef AO_HAVE_compare_and_swap_acquire
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_CMPXCHG_ACQB 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_CMPXCHG_ACQB 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(cmpxchg_acqb)(ETHR_ATMC_T__ *var,
ETHR_AINT_T__ new,
ETHR_AINT_T__ exp)
{
ETHR_AINT_T__ act;
do {
if (AO_compare_and_swap_acquire(&var->counter, (AO_t) exp, (AO_t) new))
return exp;
#ifdef AO_HAVE_load_acquire
act = (ETHR_AINT_T__) AO_load_acquire(&var->counter);
#else
act = (ETHR_AINT_T__) AO_load(&var->counter);
#endif
} while (act == exp);
#ifndef AO_HAVE_load_acquire
AO_nop_full();
#endif
return act;
}
#endif
#ifdef AO_HAVE_compare_and_swap_release
#if ETHR_SIZEOF_AO_T == 4
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC32_CMPXCHG_RELB 1
#else
# define ETHR_HAVE_ETHR_NATIVE_ATOMIC64_CMPXCHG_RELB 1
#endif
static ETHR_INLINE ETHR_AINT_T__
ETHR_NATMC_FUNC__(cmpxchg_relb)(ETHR_ATMC_T__ *var,
ETHR_AINT_T__ new,
ETHR_AINT_T__ exp)
{
ETHR_AINT_T__ act;
do {
if (AO_compare_and_swap_release(&var->counter, (AO_t) exp, (AO_t) new))
return exp;
act = (ETHR_AINT_T__) AO_load(&var->counter);
} while (act == exp);
return act;
}
#endif
#endif /* ETHR_TRY_INLINE_FUNCS */
#undef ETHR_NATMC_FUNC__
#undef ETHR_ATMC_T__
#undef ETHR_AINT_T__
#endif /* ETHR_LIBATOMIC_OPS_ATOMIC_H__ */
|
