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
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "../libnetdata.h"
// ----------------------------------------------------------------------------
// automatic thread cancelability management, based on locks
static __thread int netdata_thread_first_cancelability = 0;
static __thread int netdata_thread_lock_cancelability = 0;
inline void netdata_thread_disable_cancelability(void) {
int old;
int ret = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old);
if(ret != 0)
error("THREAD_CANCELABILITY: pthread_setcancelstate() on thread %s returned error %d", netdata_thread_tag(), ret);
else {
if(!netdata_thread_lock_cancelability)
netdata_thread_first_cancelability = old;
netdata_thread_lock_cancelability++;
}
}
inline void netdata_thread_enable_cancelability(void) {
if(netdata_thread_lock_cancelability < 1) {
error("THREAD_CANCELABILITY: netdata_thread_enable_cancelability(): invalid thread cancelability count %d on thread %s - results will be undefined - please report this!", netdata_thread_lock_cancelability, netdata_thread_tag());
}
else if(netdata_thread_lock_cancelability == 1) {
int old = 1;
int ret = pthread_setcancelstate(netdata_thread_first_cancelability, &old);
if(ret != 0)
error("THREAD_CANCELABILITY: pthread_setcancelstate() on thread %s returned error %d", netdata_thread_tag(), ret);
else {
if(old != PTHREAD_CANCEL_DISABLE)
error("THREAD_CANCELABILITY: netdata_thread_enable_cancelability(): old thread cancelability on thread %s was changed, expected DISABLED (%d), found %s (%d) - please report this!", netdata_thread_tag(), PTHREAD_CANCEL_DISABLE, (old == PTHREAD_CANCEL_ENABLE)?"ENABLED":"UNKNOWN", old);
}
netdata_thread_lock_cancelability = 0;
}
else
netdata_thread_lock_cancelability--;
}
// ----------------------------------------------------------------------------
// mutex
int __netdata_mutex_init(netdata_mutex_t *mutex) {
int ret = pthread_mutex_init(mutex, NULL);
if(unlikely(ret != 0))
error("MUTEX_LOCK: failed to initialize (code %d).", ret);
return ret;
}
int __netdata_mutex_lock(netdata_mutex_t *mutex) {
netdata_thread_disable_cancelability();
int ret = pthread_mutex_lock(mutex);
if(unlikely(ret != 0)) {
netdata_thread_enable_cancelability();
error("MUTEX_LOCK: failed to get lock (code %d)", ret);
}
return ret;
}
int __netdata_mutex_trylock(netdata_mutex_t *mutex) {
netdata_thread_disable_cancelability();
int ret = pthread_mutex_trylock(mutex);
if(ret != 0)
netdata_thread_enable_cancelability();
return ret;
}
int __netdata_mutex_unlock(netdata_mutex_t *mutex) {
int ret = pthread_mutex_unlock(mutex);
if(unlikely(ret != 0))
error("MUTEX_LOCK: failed to unlock (code %d).", ret);
else
netdata_thread_enable_cancelability();
return ret;
}
int netdata_mutex_init_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_init(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_init(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_init(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_mutex_lock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_lock(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_lock(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_lock(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_mutex_trylock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_trylock(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_trylock(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_trylock(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_mutex_unlock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_unlock(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_unlock(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_unlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
// ----------------------------------------------------------------------------
// r/w lock
int __netdata_rwlock_destroy(netdata_rwlock_t *rwlock) {
int ret = pthread_rwlock_destroy(rwlock);
if(unlikely(ret != 0))
error("RW_LOCK: failed to destroy lock (code %d)", ret);
return ret;
}
int __netdata_rwlock_init(netdata_rwlock_t *rwlock) {
int ret = pthread_rwlock_init(rwlock, NULL);
if(unlikely(ret != 0))
error("RW_LOCK: failed to initialize lock (code %d)", ret);
return ret;
}
int __netdata_rwlock_rdlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_rdlock(rwlock);
if(unlikely(ret != 0)) {
netdata_thread_enable_cancelability();
error("RW_LOCK: failed to obtain read lock (code %d)", ret);
}
return ret;
}
int __netdata_rwlock_wrlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_wrlock(rwlock);
if(unlikely(ret != 0)) {
error("RW_LOCK: failed to obtain write lock (code %d)", ret);
netdata_thread_enable_cancelability();
}
return ret;
}
int __netdata_rwlock_unlock(netdata_rwlock_t *rwlock) {
int ret = pthread_rwlock_unlock(rwlock);
if(unlikely(ret != 0))
error("RW_LOCK: failed to release lock (code %d)", ret);
else
netdata_thread_enable_cancelability();
return ret;
}
int __netdata_rwlock_tryrdlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_tryrdlock(rwlock);
if(ret != 0)
netdata_thread_enable_cancelability();
return ret;
}
int __netdata_rwlock_trywrlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_trywrlock(rwlock);
if(ret != 0)
netdata_thread_enable_cancelability();
return ret;
}
int netdata_rwlock_destroy_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_destroy(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_destroy(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_destroy(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_init_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_init(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_init(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_init(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_rdlock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_rdlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_rdlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_rdlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_wrlock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_wrlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_wrlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_wrlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_unlock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_unlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_unlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_unlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_tryrdlock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_tryrdlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_tryrdlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_tryrdlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_trywrlock_debug(const char *file __maybe_unused, const char *function __maybe_unused,
const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_trywrlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_trywrlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_trywrlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
|
