Commit | Line | Data |
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bec39940 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
bec39940 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
bec39940 | 5 | * |
bec39940 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
28ab034a JG |
9 | #include "hashtable.hpp" |
10 | #include "utils.hpp" | |
bec39940 | 11 | |
c9e313bc SM |
12 | #include <common/common.hpp> |
13 | #include <common/defaults.hpp> | |
bec39940 | 14 | |
28ab034a JG |
15 | #include <string.h> |
16 | #include <urcu.h> | |
17 | #include <urcu/compiler.h> | |
bec39940 | 18 | |
6dcd74cf JG |
19 | /* seed_lock protects both seed_init and lttng_ht_seed. */ |
20 | static pthread_mutex_t seed_lock = PTHREAD_MUTEX_INITIALIZER; | |
21 | static bool seed_init; | |
bec39940 DG |
22 | |
23 | static unsigned long min_hash_alloc_size = 1; | |
13fe1164 | 24 | static unsigned long max_hash_buckets_size = 0; |
bec39940 | 25 | |
42ce408e MD |
26 | /* |
27 | * Getter/lookup functions need to be called with RCU read-side lock | |
28 | * held. However, modification functions (add, add_unique, replace, del) | |
29 | * take the RCU lock internally, so it does not matter whether the | |
30 | * caller hold the RCU lock or not. | |
31 | */ | |
32 | ||
bec39940 DG |
33 | /* |
34 | * Match function for string node. | |
35 | */ | |
36 | static int match_str(struct cds_lfht_node *node, const void *key) | |
37 | { | |
38 | struct lttng_ht_node_str *match_node = | |
0114db0e | 39 | lttng::utils::container_of(node, <tng_ht_node_str::node); |
bec39940 DG |
40 | |
41 | return hash_match_key_str(match_node->key, (void *) key); | |
42 | } | |
43 | ||
44 | /* | |
45 | * Match function for ulong node. | |
46 | */ | |
47 | static int match_ulong(struct cds_lfht_node *node, const void *key) | |
48 | { | |
49 | struct lttng_ht_node_ulong *match_node = | |
0114db0e | 50 | lttng::utils::container_of(node, <tng_ht_node_ulong::node); |
bec39940 DG |
51 | |
52 | return hash_match_key_ulong((void *) match_node->key, (void *) key); | |
53 | } | |
54 | ||
d88aee68 DG |
55 | /* |
56 | * Match function for u64 node. | |
57 | */ | |
58 | static int match_u64(struct cds_lfht_node *node, const void *key) | |
59 | { | |
60 | struct lttng_ht_node_u64 *match_node = | |
0114db0e | 61 | lttng::utils::container_of(node, <tng_ht_node_u64::node); |
d88aee68 DG |
62 | |
63 | return hash_match_key_u64(&match_node->key, (void *) key); | |
64 | } | |
65 | ||
3c4599b9 JD |
66 | /* |
67 | * Match function for two uint64_t node. | |
68 | */ | |
69 | static int match_two_u64(struct cds_lfht_node *node, const void *key) | |
70 | { | |
71 | struct lttng_ht_node_two_u64 *match_node = | |
0114db0e | 72 | lttng::utils::container_of(node, <tng_ht_node_two_u64::node); |
3c4599b9 JD |
73 | |
74 | return hash_match_key_two_u64((void *) &match_node->key, (void *) key); | |
75 | } | |
76 | ||
28ab034a | 77 | static inline const char *lttng_ht_type_str(enum lttng_ht_type type) |
e2530e2b FD |
78 | { |
79 | switch (type) { | |
80 | case LTTNG_HT_TYPE_STRING: | |
81 | return "STRING"; | |
82 | case LTTNG_HT_TYPE_ULONG: | |
83 | return "ULONG"; | |
84 | case LTTNG_HT_TYPE_U64: | |
85 | return "U64"; | |
86 | case LTTNG_HT_TYPE_TWO_U64: | |
87 | return "TWO_U64"; | |
88 | default: | |
89 | ERR("Unknown lttng hashtable type %d", type); | |
90 | abort(); | |
91 | } | |
92 | } | |
93 | ||
bec39940 DG |
94 | /* |
95 | * Return an allocated lttng hashtable. | |
96 | */ | |
6dca8ba7 | 97 | struct lttng_ht *lttng_ht_new(unsigned long size, lttng_ht_type type) |
bec39940 DG |
98 | { |
99 | struct lttng_ht *ht; | |
100 | ||
101 | /* Test size */ | |
dc78d159 MD |
102 | if (!size) |
103 | size = DEFAULT_HT_SIZE; | |
bec39940 | 104 | |
6dcd74cf JG |
105 | pthread_mutex_lock(&seed_lock); |
106 | if (!seed_init) { | |
cd9adb8b | 107 | lttng_ht_seed = (unsigned long) time(nullptr); |
6dcd74cf JG |
108 | seed_init = true; |
109 | } | |
110 | pthread_mutex_unlock(&seed_lock); | |
111 | ||
64803277 | 112 | ht = zmalloc<lttng_ht>(); |
cd9adb8b | 113 | if (ht == nullptr) { |
bec39940 DG |
114 | PERROR("zmalloc lttng_ht"); |
115 | goto error; | |
116 | } | |
117 | ||
28ab034a JG |
118 | ht->ht = cds_lfht_new(size, |
119 | min_hash_alloc_size, | |
120 | max_hash_buckets_size, | |
121 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, | |
cd9adb8b | 122 | nullptr); |
bec39940 DG |
123 | /* |
124 | * There is already an assert in the RCU hashtable code so if the ht is | |
125 | * NULL here there is a *huge* problem. | |
126 | */ | |
a0377dfe | 127 | LTTNG_ASSERT(ht->ht); |
bec39940 DG |
128 | |
129 | switch (type) { | |
130 | case LTTNG_HT_TYPE_STRING: | |
131 | ht->match_fct = match_str; | |
132 | ht->hash_fct = hash_key_str; | |
133 | break; | |
134 | case LTTNG_HT_TYPE_ULONG: | |
135 | ht->match_fct = match_ulong; | |
136 | ht->hash_fct = hash_key_ulong; | |
137 | break; | |
d88aee68 DG |
138 | case LTTNG_HT_TYPE_U64: |
139 | ht->match_fct = match_u64; | |
140 | ht->hash_fct = hash_key_u64; | |
141 | break; | |
3c4599b9 JD |
142 | case LTTNG_HT_TYPE_TWO_U64: |
143 | ht->match_fct = match_two_u64; | |
144 | ht->hash_fct = hash_key_two_u64; | |
145 | break; | |
bec39940 DG |
146 | default: |
147 | ERR("Unknown lttng hashtable type %d", type); | |
42305b36 | 148 | lttng_ht_destroy(ht); |
bec39940 DG |
149 | goto error; |
150 | } | |
151 | ||
28ab034a | 152 | DBG3("Created hashtable size %lu at %p of type %s", size, ht->ht, lttng_ht_type_str(type)); |
bec39940 DG |
153 | |
154 | return ht; | |
155 | ||
156 | error: | |
cd9adb8b | 157 | return nullptr; |
bec39940 DG |
158 | } |
159 | ||
160 | /* | |
161 | * Free a lttng hashtable. | |
162 | */ | |
163 | void lttng_ht_destroy(struct lttng_ht *ht) | |
164 | { | |
165 | int ret; | |
166 | ||
cd9adb8b | 167 | ret = cds_lfht_destroy(ht->ht, nullptr); |
a0377dfe | 168 | LTTNG_ASSERT(!ret); |
cf5280ea | 169 | free(ht); |
bec39940 DG |
170 | } |
171 | ||
172 | /* | |
173 | * Init lttng ht node string. | |
174 | */ | |
175 | void lttng_ht_node_init_str(struct lttng_ht_node_str *node, char *key) | |
176 | { | |
a0377dfe | 177 | LTTNG_ASSERT(node); |
bec39940 DG |
178 | |
179 | node->key = key; | |
180 | cds_lfht_node_init(&node->node); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Init lttng ht node unsigned long. | |
185 | */ | |
28ab034a | 186 | void lttng_ht_node_init_ulong(struct lttng_ht_node_ulong *node, unsigned long key) |
bec39940 | 187 | { |
a0377dfe | 188 | LTTNG_ASSERT(node); |
bec39940 DG |
189 | |
190 | node->key = key; | |
191 | cds_lfht_node_init(&node->node); | |
192 | } | |
193 | ||
d88aee68 DG |
194 | /* |
195 | * Init lttng ht node uint64_t. | |
196 | */ | |
28ab034a | 197 | void lttng_ht_node_init_u64(struct lttng_ht_node_u64 *node, uint64_t key) |
d88aee68 | 198 | { |
a0377dfe | 199 | LTTNG_ASSERT(node); |
d88aee68 DG |
200 | |
201 | node->key = key; | |
202 | cds_lfht_node_init(&node->node); | |
203 | } | |
204 | ||
3c4599b9 JD |
205 | /* |
206 | * Init lttng ht node with two uint64_t. | |
207 | */ | |
28ab034a | 208 | void lttng_ht_node_init_two_u64(struct lttng_ht_node_two_u64 *node, uint64_t key1, uint64_t key2) |
3c4599b9 | 209 | { |
a0377dfe | 210 | LTTNG_ASSERT(node); |
3c4599b9 JD |
211 | |
212 | node->key.key1 = key1; | |
213 | node->key.key2 = key2; | |
214 | cds_lfht_node_init(&node->node); | |
215 | } | |
216 | ||
bec39940 DG |
217 | /* |
218 | * Free lttng ht node string. | |
219 | */ | |
220 | void lttng_ht_node_free_str(struct lttng_ht_node_str *node) | |
221 | { | |
a0377dfe | 222 | LTTNG_ASSERT(node); |
bec39940 DG |
223 | free(node); |
224 | } | |
225 | ||
226 | /* | |
227 | * Free lttng ht node unsigned long. | |
228 | */ | |
229 | void lttng_ht_node_free_ulong(struct lttng_ht_node_ulong *node) | |
230 | { | |
a0377dfe | 231 | LTTNG_ASSERT(node); |
bec39940 DG |
232 | free(node); |
233 | } | |
234 | ||
d88aee68 DG |
235 | /* |
236 | * Free lttng ht node uint64_t. | |
237 | */ | |
7972aab2 | 238 | void lttng_ht_node_free_u64(struct lttng_ht_node_u64 *node) |
d88aee68 | 239 | { |
a0377dfe | 240 | LTTNG_ASSERT(node); |
d88aee68 DG |
241 | free(node); |
242 | } | |
243 | ||
3c4599b9 JD |
244 | /* |
245 | * Free lttng ht node two uint64_t. | |
246 | */ | |
247 | void lttng_ht_node_free_two_u64(struct lttng_ht_node_two_u64 *node) | |
248 | { | |
a0377dfe | 249 | LTTNG_ASSERT(node); |
3c4599b9 JD |
250 | free(node); |
251 | } | |
252 | ||
bec39940 DG |
253 | /* |
254 | * Lookup function in hashtable. | |
255 | */ | |
28ab034a | 256 | void lttng_ht_lookup(struct lttng_ht *ht, const void *key, struct lttng_ht_iter *iter) |
bec39940 | 257 | { |
a0377dfe FD |
258 | LTTNG_ASSERT(ht); |
259 | LTTNG_ASSERT(ht->ht); | |
bec39940 | 260 | |
28ab034a | 261 | cds_lfht_lookup(ht->ht, ht->hash_fct(key, lttng_ht_seed), ht->match_fct, key, &iter->iter); |
bec39940 DG |
262 | } |
263 | ||
264 | /* | |
265 | * Add unique string node to hashtable. | |
266 | */ | |
28ab034a | 267 | void lttng_ht_add_unique_str(struct lttng_ht *ht, struct lttng_ht_node_str *node) |
bec39940 DG |
268 | { |
269 | struct cds_lfht_node *node_ptr; | |
a0377dfe FD |
270 | LTTNG_ASSERT(ht); |
271 | LTTNG_ASSERT(ht->ht); | |
272 | LTTNG_ASSERT(node); | |
bec39940 | 273 | |
42ce408e MD |
274 | /* RCU read lock protects from ABA. */ |
275 | rcu_read_lock(); | |
28ab034a JG |
276 | node_ptr = cds_lfht_add_unique(ht->ht, |
277 | ht->hash_fct(node->key, lttng_ht_seed), | |
278 | ht->match_fct, | |
279 | node->key, | |
280 | &node->node); | |
42ce408e | 281 | rcu_read_unlock(); |
a0377dfe | 282 | LTTNG_ASSERT(node_ptr == &node->node); |
bec39940 DG |
283 | } |
284 | ||
efa116c6 JD |
285 | /* |
286 | * Add string node to hashtable. | |
287 | */ | |
28ab034a | 288 | void lttng_ht_add_str(struct lttng_ht *ht, struct lttng_ht_node_str *node) |
efa116c6 | 289 | { |
a0377dfe FD |
290 | LTTNG_ASSERT(ht); |
291 | LTTNG_ASSERT(ht->ht); | |
292 | LTTNG_ASSERT(node); | |
efa116c6 | 293 | |
42ce408e MD |
294 | /* RCU read lock protects from ABA. */ |
295 | rcu_read_lock(); | |
28ab034a | 296 | cds_lfht_add(ht->ht, ht->hash_fct(node->key, lttng_ht_seed), &node->node); |
42ce408e | 297 | rcu_read_unlock(); |
efa116c6 JD |
298 | } |
299 | ||
aefea3b7 DG |
300 | /* |
301 | * Add unsigned long node to hashtable. | |
302 | */ | |
303 | void lttng_ht_add_ulong(struct lttng_ht *ht, struct lttng_ht_node_ulong *node) | |
304 | { | |
a0377dfe FD |
305 | LTTNG_ASSERT(ht); |
306 | LTTNG_ASSERT(ht->ht); | |
307 | LTTNG_ASSERT(node); | |
aefea3b7 | 308 | |
42ce408e MD |
309 | /* RCU read lock protects from ABA. */ |
310 | rcu_read_lock(); | |
28ab034a | 311 | cds_lfht_add(ht->ht, ht->hash_fct((void *) node->key, lttng_ht_seed), &node->node); |
42ce408e | 312 | rcu_read_unlock(); |
aefea3b7 DG |
313 | } |
314 | ||
d88aee68 DG |
315 | /* |
316 | * Add uint64_t node to hashtable. | |
d88aee68 DG |
317 | */ |
318 | void lttng_ht_add_u64(struct lttng_ht *ht, struct lttng_ht_node_u64 *node) | |
319 | { | |
a0377dfe FD |
320 | LTTNG_ASSERT(ht); |
321 | LTTNG_ASSERT(ht->ht); | |
322 | LTTNG_ASSERT(node); | |
d88aee68 | 323 | |
42ce408e MD |
324 | /* RCU read lock protects from ABA. */ |
325 | rcu_read_lock(); | |
28ab034a | 326 | cds_lfht_add(ht->ht, ht->hash_fct(&node->key, lttng_ht_seed), &node->node); |
42ce408e | 327 | rcu_read_unlock(); |
d88aee68 DG |
328 | } |
329 | ||
bec39940 DG |
330 | /* |
331 | * Add unique unsigned long node to hashtable. | |
332 | */ | |
28ab034a | 333 | void lttng_ht_add_unique_ulong(struct lttng_ht *ht, struct lttng_ht_node_ulong *node) |
bec39940 DG |
334 | { |
335 | struct cds_lfht_node *node_ptr; | |
a0377dfe FD |
336 | LTTNG_ASSERT(ht); |
337 | LTTNG_ASSERT(ht->ht); | |
338 | LTTNG_ASSERT(node); | |
bec39940 | 339 | |
42ce408e MD |
340 | /* RCU read lock protects from ABA. */ |
341 | rcu_read_lock(); | |
bec39940 | 342 | node_ptr = cds_lfht_add_unique(ht->ht, |
28ab034a JG |
343 | ht->hash_fct((void *) node->key, lttng_ht_seed), |
344 | ht->match_fct, | |
345 | (void *) node->key, | |
346 | &node->node); | |
42ce408e | 347 | rcu_read_unlock(); |
a0377dfe | 348 | LTTNG_ASSERT(node_ptr == &node->node); |
bec39940 DG |
349 | } |
350 | ||
d88aee68 DG |
351 | /* |
352 | * Add unique uint64_t node to hashtable. | |
353 | */ | |
28ab034a | 354 | void lttng_ht_add_unique_u64(struct lttng_ht *ht, struct lttng_ht_node_u64 *node) |
d88aee68 DG |
355 | { |
356 | struct cds_lfht_node *node_ptr; | |
a0377dfe FD |
357 | LTTNG_ASSERT(ht); |
358 | LTTNG_ASSERT(ht->ht); | |
359 | LTTNG_ASSERT(node); | |
d88aee68 | 360 | |
42ce408e MD |
361 | /* RCU read lock protects from ABA. */ |
362 | rcu_read_lock(); | |
d88aee68 | 363 | node_ptr = cds_lfht_add_unique(ht->ht, |
28ab034a JG |
364 | ht->hash_fct(&node->key, lttng_ht_seed), |
365 | ht->match_fct, | |
366 | &node->key, | |
367 | &node->node); | |
42ce408e | 368 | rcu_read_unlock(); |
a0377dfe | 369 | LTTNG_ASSERT(node_ptr == &node->node); |
d88aee68 DG |
370 | } |
371 | ||
3c4599b9 JD |
372 | /* |
373 | * Add unique two uint64_t node to hashtable. | |
374 | */ | |
28ab034a | 375 | void lttng_ht_add_unique_two_u64(struct lttng_ht *ht, struct lttng_ht_node_two_u64 *node) |
3c4599b9 JD |
376 | { |
377 | struct cds_lfht_node *node_ptr; | |
a0377dfe FD |
378 | LTTNG_ASSERT(ht); |
379 | LTTNG_ASSERT(ht->ht); | |
380 | LTTNG_ASSERT(node); | |
3c4599b9 | 381 | |
42ce408e MD |
382 | /* RCU read lock protects from ABA. */ |
383 | rcu_read_lock(); | |
3c4599b9 | 384 | node_ptr = cds_lfht_add_unique(ht->ht, |
28ab034a JG |
385 | ht->hash_fct((void *) &node->key, lttng_ht_seed), |
386 | ht->match_fct, | |
387 | (void *) &node->key, | |
388 | &node->node); | |
42ce408e | 389 | rcu_read_unlock(); |
a0377dfe | 390 | LTTNG_ASSERT(node_ptr == &node->node); |
3c4599b9 JD |
391 | } |
392 | ||
702b1ea4 MD |
393 | /* |
394 | * Add replace unsigned long node to hashtable. | |
395 | */ | |
396 | struct lttng_ht_node_ulong *lttng_ht_add_replace_ulong(struct lttng_ht *ht, | |
28ab034a | 397 | struct lttng_ht_node_ulong *node) |
702b1ea4 MD |
398 | { |
399 | struct cds_lfht_node *node_ptr; | |
a0377dfe FD |
400 | LTTNG_ASSERT(ht); |
401 | LTTNG_ASSERT(ht->ht); | |
402 | LTTNG_ASSERT(node); | |
702b1ea4 | 403 | |
42ce408e MD |
404 | /* RCU read lock protects from ABA. */ |
405 | rcu_read_lock(); | |
702b1ea4 | 406 | node_ptr = cds_lfht_add_replace(ht->ht, |
28ab034a JG |
407 | ht->hash_fct((void *) node->key, lttng_ht_seed), |
408 | ht->match_fct, | |
409 | (void *) node->key, | |
410 | &node->node); | |
42ce408e | 411 | rcu_read_unlock(); |
702b1ea4 | 412 | if (!node_ptr) { |
cd9adb8b | 413 | return nullptr; |
702b1ea4 | 414 | } else { |
0114db0e | 415 | return lttng::utils::container_of(node_ptr, <tng_ht_node_ulong::node); |
702b1ea4 | 416 | } |
a0377dfe | 417 | LTTNG_ASSERT(node_ptr == &node->node); |
702b1ea4 MD |
418 | } |
419 | ||
d88aee68 DG |
420 | /* |
421 | * Add replace unsigned long node to hashtable. | |
422 | */ | |
423 | struct lttng_ht_node_u64 *lttng_ht_add_replace_u64(struct lttng_ht *ht, | |
28ab034a | 424 | struct lttng_ht_node_u64 *node) |
d88aee68 DG |
425 | { |
426 | struct cds_lfht_node *node_ptr; | |
a0377dfe FD |
427 | LTTNG_ASSERT(ht); |
428 | LTTNG_ASSERT(ht->ht); | |
429 | LTTNG_ASSERT(node); | |
d88aee68 | 430 | |
42ce408e MD |
431 | /* RCU read lock protects from ABA. */ |
432 | rcu_read_lock(); | |
d88aee68 | 433 | node_ptr = cds_lfht_add_replace(ht->ht, |
28ab034a JG |
434 | ht->hash_fct(&node->key, lttng_ht_seed), |
435 | ht->match_fct, | |
436 | &node->key, | |
437 | &node->node); | |
42ce408e | 438 | rcu_read_unlock(); |
d88aee68 | 439 | if (!node_ptr) { |
cd9adb8b | 440 | return nullptr; |
d88aee68 | 441 | } else { |
0114db0e | 442 | return lttng::utils::container_of(node_ptr, <tng_ht_node_u64::node); |
d88aee68 | 443 | } |
a0377dfe | 444 | LTTNG_ASSERT(node_ptr == &node->node); |
d88aee68 DG |
445 | } |
446 | ||
bec39940 DG |
447 | /* |
448 | * Delete node from hashtable. | |
449 | */ | |
450 | int lttng_ht_del(struct lttng_ht *ht, struct lttng_ht_iter *iter) | |
451 | { | |
42ce408e MD |
452 | int ret; |
453 | ||
a0377dfe FD |
454 | LTTNG_ASSERT(ht); |
455 | LTTNG_ASSERT(ht->ht); | |
456 | LTTNG_ASSERT(iter); | |
bec39940 | 457 | |
42ce408e MD |
458 | /* RCU read lock protects from ABA. */ |
459 | rcu_read_lock(); | |
460 | ret = cds_lfht_del(ht->ht, iter->iter.node); | |
461 | rcu_read_unlock(); | |
462 | return ret; | |
bec39940 DG |
463 | } |
464 | ||
465 | /* | |
466 | * Get first node in the hashtable. | |
467 | */ | |
468 | void lttng_ht_get_first(struct lttng_ht *ht, struct lttng_ht_iter *iter) | |
469 | { | |
a0377dfe FD |
470 | LTTNG_ASSERT(ht); |
471 | LTTNG_ASSERT(ht->ht); | |
472 | LTTNG_ASSERT(iter); | |
bec39940 DG |
473 | |
474 | cds_lfht_first(ht->ht, &iter->iter); | |
475 | } | |
476 | ||
477 | /* | |
478 | * Get next node in the hashtable. | |
479 | */ | |
480 | void lttng_ht_get_next(struct lttng_ht *ht, struct lttng_ht_iter *iter) | |
481 | { | |
a0377dfe FD |
482 | LTTNG_ASSERT(ht); |
483 | LTTNG_ASSERT(ht->ht); | |
484 | LTTNG_ASSERT(iter); | |
bec39940 DG |
485 | |
486 | cds_lfht_next(ht->ht, &iter->iter); | |
487 | } | |
488 | ||
489 | /* | |
490 | * Return the number of nodes in the hashtable. | |
491 | */ | |
492 | unsigned long lttng_ht_get_count(struct lttng_ht *ht) | |
493 | { | |
494 | long scb, sca; | |
495 | unsigned long count; | |
496 | ||
a0377dfe FD |
497 | LTTNG_ASSERT(ht); |
498 | LTTNG_ASSERT(ht->ht); | |
bec39940 | 499 | |
42ce408e MD |
500 | /* RCU read lock protects from ABA and allows RCU traversal. */ |
501 | rcu_read_lock(); | |
bec39940 | 502 | cds_lfht_count_nodes(ht->ht, &scb, &count, &sca); |
42ce408e | 503 | rcu_read_unlock(); |
bec39940 DG |
504 | |
505 | return count; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Return lttng ht string node from iterator. | |
510 | */ | |
28ab034a | 511 | struct lttng_ht_node_str *lttng_ht_iter_get_node_str(struct lttng_ht_iter *iter) |
bec39940 DG |
512 | { |
513 | struct cds_lfht_node *node; | |
514 | ||
a0377dfe | 515 | LTTNG_ASSERT(iter); |
bec39940 DG |
516 | node = cds_lfht_iter_get_node(&iter->iter); |
517 | if (!node) { | |
cd9adb8b | 518 | return nullptr; |
bec39940 | 519 | } |
0114db0e | 520 | return lttng::utils::container_of(node, <tng_ht_node_str::node); |
bec39940 DG |
521 | } |
522 | ||
523 | /* | |
524 | * Return lttng ht unsigned long node from iterator. | |
525 | */ | |
28ab034a | 526 | struct lttng_ht_node_ulong *lttng_ht_iter_get_node_ulong(struct lttng_ht_iter *iter) |
bec39940 DG |
527 | { |
528 | struct cds_lfht_node *node; | |
529 | ||
a0377dfe | 530 | LTTNG_ASSERT(iter); |
bec39940 DG |
531 | node = cds_lfht_iter_get_node(&iter->iter); |
532 | if (!node) { | |
cd9adb8b | 533 | return nullptr; |
bec39940 | 534 | } |
0114db0e | 535 | return lttng::utils::container_of(node, <tng_ht_node_ulong::node); |
bec39940 | 536 | } |
b6314938 | 537 | |
d88aee68 DG |
538 | /* |
539 | * Return lttng ht unsigned long node from iterator. | |
540 | */ | |
28ab034a | 541 | struct lttng_ht_node_u64 *lttng_ht_iter_get_node_u64(struct lttng_ht_iter *iter) |
d88aee68 DG |
542 | { |
543 | struct cds_lfht_node *node; | |
544 | ||
a0377dfe | 545 | LTTNG_ASSERT(iter); |
d88aee68 DG |
546 | node = cds_lfht_iter_get_node(&iter->iter); |
547 | if (!node) { | |
cd9adb8b | 548 | return nullptr; |
d88aee68 | 549 | } |
0114db0e | 550 | return lttng::utils::container_of(node, <tng_ht_node_u64::node); |
d88aee68 DG |
551 | } |
552 | ||
3c4599b9 JD |
553 | /* |
554 | * Return lttng ht stream and index id node from iterator. | |
555 | */ | |
28ab034a | 556 | struct lttng_ht_node_two_u64 *lttng_ht_iter_get_node_two_u64(struct lttng_ht_iter *iter) |
3c4599b9 JD |
557 | { |
558 | struct cds_lfht_node *node; | |
559 | ||
a0377dfe | 560 | LTTNG_ASSERT(iter); |
3c4599b9 JD |
561 | node = cds_lfht_iter_get_node(&iter->iter); |
562 | if (!node) { | |
cd9adb8b | 563 | return nullptr; |
3c4599b9 | 564 | } |
0114db0e | 565 | return lttng::utils::container_of(node, <tng_ht_node_two_u64::node); |
3c4599b9 | 566 | } |