Commit | Line | Data |
---|---|---|
b257a10b MD |
1 | /* |
2 | * urcu.c | |
3 | * | |
4 | * Userspace RCU library | |
5 | * | |
6982d6d7 | 6 | * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
af02d47e | 7 | * Copyright (c) 2009 Paul E. McKenney, IBM Corporation. |
b257a10b | 8 | * |
af02d47e MD |
9 | * This library is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
54843abc PM |
22 | * |
23 | * IBM's contributions to this file may be relicensed under LGPLv2 or later. | |
b257a10b MD |
24 | */ |
25 | ||
fdf01eed | 26 | #define _BSD_SOURCE |
c1d2c60b | 27 | #define _GNU_SOURCE |
71c811bf | 28 | #define _LGPL_SOURCE |
27b012e2 MD |
29 | #include <stdio.h> |
30 | #include <pthread.h> | |
31 | #include <signal.h> | |
32 | #include <assert.h> | |
f69f195a | 33 | #include <stdlib.h> |
6d841bc2 | 34 | #include <stdint.h> |
f69f195a | 35 | #include <string.h> |
09a9f986 | 36 | #include <errno.h> |
e8043c1b | 37 | #include <poll.h> |
27b012e2 | 38 | |
71c811bf | 39 | #include "urcu/wfqueue.h" |
57760d44 | 40 | #include "urcu/map/urcu.h" |
af7c2dbe | 41 | #include "urcu/static/urcu.h" |
618b2595 | 42 | #include "urcu-pointer.h" |
bd252a04 | 43 | #include "urcu/tls-compat.h" |
71c811bf | 44 | |
121a5d44 | 45 | /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */ |
71c811bf | 46 | #undef _LGPL_SOURCE |
27b012e2 | 47 | #include "urcu.h" |
71c811bf | 48 | #define _LGPL_SOURCE |
27b012e2 | 49 | |
3a71751e PB |
50 | /* |
51 | * If a reader is really non-cooperative and refuses to commit its | |
52 | * rcu_active_readers count to memory (there is no barrier in the reader | |
53 | * per-se), kick it after a few loops waiting for it. | |
54 | */ | |
55 | #define KICK_READER_LOOPS 10000 | |
56 | ||
57 | /* | |
58 | * Active attempts to check for reader Q.S. before calling futex(). | |
59 | */ | |
60 | #define RCU_QS_ACTIVE_ATTEMPTS 100 | |
61 | ||
fdf01eed | 62 | #ifdef RCU_MEMBARRIER |
834a45ba | 63 | static int init_done; |
fdf01eed | 64 | int has_sys_membarrier; |
834a45ba | 65 | |
02be5561 | 66 | void __attribute__((constructor)) rcu_init(void); |
fdf01eed MD |
67 | #endif |
68 | ||
69 | #ifdef RCU_MB | |
02be5561 | 70 | void rcu_init(void) |
e90a6e9c MD |
71 | { |
72 | } | |
73 | #endif | |
8a5fb4c9 | 74 | |
fdf01eed MD |
75 | #ifdef RCU_SIGNAL |
76 | static int init_done; | |
77 | ||
78 | void __attribute__((constructor)) rcu_init(void); | |
79 | void __attribute__((destructor)) rcu_exit(void); | |
80 | #endif | |
81 | ||
6abb4bd5 | 82 | static pthread_mutex_t rcu_gp_lock = PTHREAD_MUTEX_INITIALIZER; |
27b012e2 | 83 | |
6d841bc2 | 84 | int32_t gp_futex; |
bc6c15bb | 85 | |
128166c9 MD |
86 | /* |
87 | * Global grace period counter. | |
02be5561 | 88 | * Contains the current RCU_GP_CTR_PHASE. |
afb8f2c9 | 89 | * Also has a RCU_GP_COUNT of 1, to accelerate the reader fast path. |
b0d5e790 | 90 | * Written to only by writer with mutex taken. Read by both writer and readers. |
128166c9 | 91 | */ |
27d65bc5 | 92 | unsigned long rcu_gp_ctr = RCU_GP_COUNT; |
27b012e2 | 93 | |
b0d5e790 MD |
94 | /* |
95 | * Written to only by each individual reader. Read by both the reader and the | |
96 | * writers. | |
97 | */ | |
bd252a04 | 98 | DEFINE_URCU_TLS(struct rcu_reader, rcu_reader); |
27b012e2 | 99 | |
cf380c2f | 100 | #ifdef DEBUG_YIELD |
9d335088 | 101 | unsigned int yield_active; |
bd252a04 | 102 | DEFINE_URCU_TLS(unsigned int, rand_yield); |
cf380c2f MD |
103 | #endif |
104 | ||
16aa9ee8 | 105 | static CDS_LIST_HEAD(registry); |
27b012e2 | 106 | |
6abb4bd5 | 107 | static void mutex_lock(pthread_mutex_t *mutex) |
41718ff9 MD |
108 | { |
109 | int ret; | |
09a9f986 PM |
110 | |
111 | #ifndef DISTRUST_SIGNALS_EXTREME | |
6abb4bd5 | 112 | ret = pthread_mutex_lock(mutex); |
41718ff9 MD |
113 | if (ret) { |
114 | perror("Error in pthread mutex lock"); | |
115 | exit(-1); | |
116 | } | |
09a9f986 | 117 | #else /* #ifndef DISTRUST_SIGNALS_EXTREME */ |
6abb4bd5 | 118 | while ((ret = pthread_mutex_trylock(mutex)) != 0) { |
09a9f986 PM |
119 | if (ret != EBUSY && ret != EINTR) { |
120 | printf("ret = %d, errno = %d\n", ret, errno); | |
121 | perror("Error in pthread mutex lock"); | |
122 | exit(-1); | |
123 | } | |
bd252a04 | 124 | if (CMM_LOAD_SHARED(URCU_TLS(rcu_reader).need_mb)) { |
5481ddb3 | 125 | cmm_smp_mb(); |
bd252a04 | 126 | _CMM_STORE_SHARED(URCU_TLS(rcu_reader).need_mb, 0); |
5481ddb3 | 127 | cmm_smp_mb(); |
09a9f986 PM |
128 | } |
129 | poll(NULL,0,10); | |
130 | } | |
131 | #endif /* #else #ifndef DISTRUST_SIGNALS_EXTREME */ | |
41718ff9 MD |
132 | } |
133 | ||
6abb4bd5 | 134 | static void mutex_unlock(pthread_mutex_t *mutex) |
41718ff9 MD |
135 | { |
136 | int ret; | |
137 | ||
6abb4bd5 | 138 | ret = pthread_mutex_unlock(mutex); |
41718ff9 MD |
139 | if (ret) { |
140 | perror("Error in pthread mutex unlock"); | |
141 | exit(-1); | |
142 | } | |
143 | } | |
144 | ||
fdf01eed | 145 | #ifdef RCU_MEMBARRIER |
25cc6d18 | 146 | static void smp_mb_master(int group) |
fdf01eed | 147 | { |
a0b7f7ea | 148 | if (caa_likely(has_sys_membarrier)) |
f0708810 | 149 | membarrier(MEMBARRIER_EXPEDITED); |
fdf01eed | 150 | else |
5481ddb3 | 151 | cmm_smp_mb(); |
fdf01eed MD |
152 | } |
153 | #endif | |
154 | ||
02be5561 | 155 | #ifdef RCU_MB |
25cc6d18 | 156 | static void smp_mb_master(int group) |
40e140c9 | 157 | { |
5481ddb3 | 158 | cmm_smp_mb(); |
40e140c9 | 159 | } |
fdf01eed MD |
160 | #endif |
161 | ||
162 | #ifdef RCU_SIGNAL | |
78ff9419 | 163 | static void force_mb_all_readers(void) |
27b012e2 | 164 | { |
02be5561 | 165 | struct rcu_reader *index; |
e3b0cef0 | 166 | |
27b012e2 | 167 | /* |
5481ddb3 | 168 | * Ask for each threads to execute a cmm_smp_mb() so we can consider the |
27b012e2 MD |
169 | * compiler barriers around rcu read lock as real memory barriers. |
170 | */ | |
16aa9ee8 | 171 | if (cds_list_empty(®istry)) |
27b012e2 | 172 | return; |
3a86deba | 173 | /* |
5481ddb3 | 174 | * pthread_kill has a cmm_smp_mb(). But beware, we assume it performs |
157dca95 | 175 | * a cache flush on architectures with non-coherent cache. Let's play |
5481ddb3 | 176 | * safe and don't assume anything : we use cmm_smp_mc() to make sure the |
157dca95 | 177 | * cache flush is enforced. |
3a86deba | 178 | */ |
16aa9ee8 | 179 | cds_list_for_each_entry(index, ®istry, node) { |
6cf3827c | 180 | CMM_STORE_SHARED(index->need_mb, 1); |
02be5561 | 181 | pthread_kill(index->tid, SIGRCU); |
09a9f986 | 182 | } |
27b012e2 MD |
183 | /* |
184 | * Wait for sighandler (and thus mb()) to execute on every thread. | |
09a9f986 PM |
185 | * |
186 | * Note that the pthread_kill() will never be executed on systems | |
187 | * that correctly deliver signals in a timely manner. However, it | |
188 | * is not uncommon for kernels to have bugs that can result in | |
189 | * lost or unduly delayed signals. | |
190 | * | |
191 | * If you are seeing the below pthread_kill() executing much at | |
192 | * all, we suggest testing the underlying kernel and filing the | |
193 | * relevant bug report. For Linux kernels, we recommend getting | |
194 | * the Linux Test Project (LTP). | |
27b012e2 | 195 | */ |
16aa9ee8 | 196 | cds_list_for_each_entry(index, ®istry, node) { |
6cf3827c | 197 | while (CMM_LOAD_SHARED(index->need_mb)) { |
02be5561 | 198 | pthread_kill(index->tid, SIGRCU); |
09a9f986 PM |
199 | poll(NULL, 0, 1); |
200 | } | |
201 | } | |
5481ddb3 | 202 | cmm_smp_mb(); /* read ->need_mb before ending the barrier */ |
27b012e2 | 203 | } |
9d7e3f89 | 204 | |
25cc6d18 | 205 | static void smp_mb_master(int group) |
9d7e3f89 MD |
206 | { |
207 | force_mb_all_readers(); | |
208 | } | |
fdf01eed | 209 | #endif /* #ifdef RCU_SIGNAL */ |
27b012e2 | 210 | |
bc6c15bb MD |
211 | /* |
212 | * synchronize_rcu() waiting. Single thread. | |
213 | */ | |
cfe78e25 | 214 | static void wait_gp(void) |
bc6c15bb | 215 | { |
cfe78e25 | 216 | /* Read reader_gp before read futex */ |
25cc6d18 | 217 | smp_mb_master(RCU_MB_GROUP); |
cfe78e25 | 218 | if (uatomic_read(&gp_futex) == -1) |
0854ccff | 219 | futex_async(&gp_futex, FUTEX_WAIT, -1, |
cfe78e25 | 220 | NULL, NULL, 0); |
bc6c15bb MD |
221 | } |
222 | ||
2dfb8b5e | 223 | void update_counter_and_wait(void) |
27b012e2 | 224 | { |
16aa9ee8 | 225 | CDS_LIST_HEAD(qsreaders); |
cfe78e25 | 226 | int wait_loops = 0; |
02be5561 | 227 | struct rcu_reader *index, *tmp; |
27b012e2 | 228 | |
32c15e4e | 229 | /* Switch parity: 0 -> 1, 1 -> 0 */ |
6cf3827c | 230 | CMM_STORE_SHARED(rcu_gp_ctr, rcu_gp_ctr ^ RCU_GP_CTR_PHASE); |
2dfb8b5e MD |
231 | |
232 | /* | |
d40fde2c MD |
233 | * Must commit rcu_gp_ctr update to memory before waiting for quiescent |
234 | * state. Failure to do so could result in the writer waiting forever | |
235 | * while new readers are always accessing data (no progress). Enforce | |
236 | * compiler-order of store to rcu_gp_ctr before load rcu_reader ctr. | |
2dfb8b5e | 237 | */ |
5481ddb3 | 238 | cmm_barrier(); |
2dfb8b5e MD |
239 | |
240 | /* | |
935b11ff | 241 | * |
5481ddb3 | 242 | * Adding a cmm_smp_mb() which is _not_ formally required, but makes the |
2dfb8b5e MD |
243 | * model easier to understand. It does not have a big performance impact |
244 | * anyway, given this is the write-side. | |
245 | */ | |
5481ddb3 | 246 | cmm_smp_mb(); |
2dfb8b5e | 247 | |
40e140c9 | 248 | /* |
bd252a04 | 249 | * Wait for each thread URCU_TLS(rcu_reader).ctr count to become 0. |
27b012e2 | 250 | */ |
cfe78e25 MD |
251 | for (;;) { |
252 | wait_loops++; | |
253 | if (wait_loops == RCU_QS_ACTIVE_ATTEMPTS) { | |
254 | uatomic_dec(&gp_futex); | |
255 | /* Write futex before read reader_gp */ | |
25cc6d18 | 256 | smp_mb_master(RCU_MB_GROUP); |
cfe78e25 MD |
257 | } |
258 | ||
16aa9ee8 | 259 | cds_list_for_each_entry_safe(index, tmp, ®istry, node) { |
b95a001f | 260 | if (!rcu_gp_ongoing(&index->ctr)) |
16aa9ee8 | 261 | cds_list_move(&index->node, &qsreaders); |
cfe78e25 MD |
262 | } |
263 | ||
e8043c1b | 264 | #ifndef HAS_INCOHERENT_CACHES |
16aa9ee8 | 265 | if (cds_list_empty(®istry)) { |
cfe78e25 MD |
266 | if (wait_loops == RCU_QS_ACTIVE_ATTEMPTS) { |
267 | /* Read reader_gp before write futex */ | |
25cc6d18 | 268 | smp_mb_master(RCU_MB_GROUP); |
cfe78e25 | 269 | uatomic_set(&gp_futex, 0); |
bc6c15bb | 270 | } |
cfe78e25 MD |
271 | break; |
272 | } else { | |
273 | if (wait_loops == RCU_QS_ACTIVE_ATTEMPTS) | |
274 | wait_gp(); | |
275 | else | |
06f22bdb | 276 | caa_cpu_relax(); |
bc6c15bb | 277 | } |
e8043c1b | 278 | #else /* #ifndef HAS_INCOHERENT_CACHES */ |
27b012e2 | 279 | /* |
40e140c9 | 280 | * BUSY-LOOP. Force the reader thread to commit its |
bd252a04 MD |
281 | * URCU_TLS(rcu_reader).ctr update to memory if we wait |
282 | * for too long. | |
27b012e2 | 283 | */ |
16aa9ee8 | 284 | if (cds_list_empty(®istry)) { |
cfe78e25 MD |
285 | if (wait_loops == RCU_QS_ACTIVE_ATTEMPTS) { |
286 | /* Read reader_gp before write futex */ | |
25cc6d18 | 287 | smp_mb_master(RCU_MB_GROUP); |
cfe78e25 MD |
288 | uatomic_set(&gp_futex, 0); |
289 | } | |
290 | break; | |
291 | } else { | |
292 | switch (wait_loops) { | |
bc6c15bb | 293 | case RCU_QS_ACTIVE_ATTEMPTS: |
cfe78e25 MD |
294 | wait_gp(); |
295 | break; /* only escape switch */ | |
bc6c15bb | 296 | case KICK_READER_LOOPS: |
25cc6d18 | 297 | smp_mb_master(RCU_MB_GROUP); |
40e140c9 | 298 | wait_loops = 0; |
cfe78e25 | 299 | break; /* only escape switch */ |
bc6c15bb | 300 | default: |
06f22bdb | 301 | caa_cpu_relax(); |
40e140c9 MD |
302 | } |
303 | } | |
e8043c1b | 304 | #endif /* #else #ifndef HAS_INCOHERENT_CACHES */ |
27b012e2 | 305 | } |
cfe78e25 | 306 | /* put back the reader list in the registry */ |
16aa9ee8 | 307 | cds_list_splice(&qsreaders, ®istry); |
27b012e2 MD |
308 | } |
309 | ||
9598a481 | 310 | void synchronize_rcu(void) |
2bc59bd7 | 311 | { |
6abb4bd5 | 312 | mutex_lock(&rcu_gp_lock); |
135530fd | 313 | |
16aa9ee8 | 314 | if (cds_list_empty(®istry)) |
2dfb8b5e MD |
315 | goto out; |
316 | ||
9598a481 | 317 | /* All threads should read qparity before accessing data structure |
6abb4bd5 MD |
318 | * where new ptr points to. Must be done within rcu_gp_lock because it |
319 | * iterates on reader threads.*/ | |
9598a481 | 320 | /* Write new ptr before changing the qparity */ |
25cc6d18 | 321 | smp_mb_master(RCU_MB_GROUP); |
9598a481 | 322 | |
9598a481 MD |
323 | /* |
324 | * Wait for previous parity to be empty of readers. | |
325 | */ | |
2dfb8b5e | 326 | update_counter_and_wait(); /* 0 -> 1, wait readers in parity 0 */ |
9598a481 MD |
327 | |
328 | /* | |
329 | * Must finish waiting for quiescent state for parity 0 before | |
d40fde2c MD |
330 | * committing next rcu_gp_ctr update to memory. Failure to do so could |
331 | * result in the writer waiting forever while new readers are always | |
332 | * accessing data (no progress). Enforce compiler-order of load | |
bd252a04 | 333 | * URCU_TLS(rcu_reader).ctr before store to rcu_gp_ctr. |
9598a481 | 334 | */ |
5481ddb3 | 335 | cmm_barrier(); |
9598a481 | 336 | |
5dba80f9 | 337 | /* |
5481ddb3 | 338 | * Adding a cmm_smp_mb() which is _not_ formally required, but makes the |
5dba80f9 MD |
339 | * model easier to understand. It does not have a big performance impact |
340 | * anyway, given this is the write-side. | |
341 | */ | |
5481ddb3 | 342 | cmm_smp_mb(); |
67c2d80b | 343 | |
9598a481 MD |
344 | /* |
345 | * Wait for previous parity to be empty of readers. | |
346 | */ | |
2dfb8b5e | 347 | update_counter_and_wait(); /* 1 -> 0, wait readers in parity 1 */ |
9598a481 | 348 | |
9598a481 | 349 | /* Finish waiting for reader threads before letting the old ptr being |
6abb4bd5 MD |
350 | * freed. Must be done within rcu_gp_lock because it iterates on reader |
351 | * threads. */ | |
25cc6d18 | 352 | smp_mb_master(RCU_MB_GROUP); |
2dfb8b5e | 353 | out: |
6abb4bd5 | 354 | mutex_unlock(&rcu_gp_lock); |
2bc59bd7 PM |
355 | } |
356 | ||
121a5d44 MD |
357 | /* |
358 | * library wrappers to be used by non-LGPL compatible source code. | |
359 | */ | |
360 | ||
361 | void rcu_read_lock(void) | |
362 | { | |
363 | _rcu_read_lock(); | |
364 | } | |
365 | ||
366 | void rcu_read_unlock(void) | |
367 | { | |
368 | _rcu_read_unlock(); | |
369 | } | |
370 | ||
121a5d44 | 371 | void rcu_register_thread(void) |
27b012e2 | 372 | { |
bd252a04 MD |
373 | URCU_TLS(rcu_reader).tid = pthread_self(); |
374 | assert(URCU_TLS(rcu_reader).need_mb == 0); | |
375 | assert(!(URCU_TLS(rcu_reader).ctr & RCU_GP_CTR_NEST_MASK)); | |
02be5561 | 376 | |
6abb4bd5 | 377 | mutex_lock(&rcu_gp_lock); |
02be5561 | 378 | rcu_init(); /* In case gcc does not support constructor attribute */ |
bd252a04 | 379 | cds_list_add(&URCU_TLS(rcu_reader).node, ®istry); |
6abb4bd5 | 380 | mutex_unlock(&rcu_gp_lock); |
27b012e2 MD |
381 | } |
382 | ||
121a5d44 | 383 | void rcu_unregister_thread(void) |
27b012e2 | 384 | { |
6abb4bd5 | 385 | mutex_lock(&rcu_gp_lock); |
bd252a04 | 386 | cds_list_del(&URCU_TLS(rcu_reader).node); |
6abb4bd5 | 387 | mutex_unlock(&rcu_gp_lock); |
27b012e2 MD |
388 | } |
389 | ||
fdf01eed MD |
390 | #ifdef RCU_MEMBARRIER |
391 | void rcu_init(void) | |
392 | { | |
393 | if (init_done) | |
394 | return; | |
395 | init_done = 1; | |
cf5271ee | 396 | if (!membarrier(MEMBARRIER_EXPEDITED | MEMBARRIER_QUERY)) |
fdf01eed MD |
397 | has_sys_membarrier = 1; |
398 | } | |
399 | #endif | |
400 | ||
401 | #ifdef RCU_SIGNAL | |
02be5561 | 402 | static void sigrcu_handler(int signo, siginfo_t *siginfo, void *context) |
27b012e2 | 403 | { |
40e140c9 | 404 | /* |
5481ddb3 DG |
405 | * Executing this cmm_smp_mb() is the only purpose of this signal handler. |
406 | * It punctually promotes cmm_barrier() into cmm_smp_mb() on every thread it is | |
40e140c9 MD |
407 | * executed on. |
408 | */ | |
5481ddb3 | 409 | cmm_smp_mb(); |
bd252a04 | 410 | _CMM_STORE_SHARED(URCU_TLS(rcu_reader).need_mb, 0); |
5481ddb3 | 411 | cmm_smp_mb(); |
27b012e2 MD |
412 | } |
413 | ||
8a5fb4c9 | 414 | /* |
02be5561 | 415 | * rcu_init constructor. Called when the library is linked, but also when |
8a5fb4c9 MD |
416 | * reader threads are calling rcu_register_thread(). |
417 | * Should only be called by a single thread at a given time. This is ensured by | |
6abb4bd5 MD |
418 | * holing the rcu_gp_lock from rcu_register_thread() or by running at library |
419 | * load time, which should not be executed by multiple threads nor concurrently | |
420 | * with rcu_register_thread() anyway. | |
8a5fb4c9 | 421 | */ |
02be5561 | 422 | void rcu_init(void) |
27b012e2 MD |
423 | { |
424 | struct sigaction act; | |
425 | int ret; | |
426 | ||
8a5fb4c9 MD |
427 | if (init_done) |
428 | return; | |
429 | init_done = 1; | |
430 | ||
02be5561 | 431 | act.sa_sigaction = sigrcu_handler; |
dd052bd3 | 432 | act.sa_flags = SA_SIGINFO | SA_RESTART; |
c297c21c | 433 | sigemptyset(&act.sa_mask); |
02be5561 | 434 | ret = sigaction(SIGRCU, &act, NULL); |
f69f195a MD |
435 | if (ret) { |
436 | perror("Error in sigaction"); | |
27b012e2 MD |
437 | exit(-1); |
438 | } | |
439 | } | |
440 | ||
02be5561 | 441 | void rcu_exit(void) |
27b012e2 MD |
442 | { |
443 | struct sigaction act; | |
444 | int ret; | |
445 | ||
02be5561 | 446 | ret = sigaction(SIGRCU, NULL, &act); |
f69f195a MD |
447 | if (ret) { |
448 | perror("Error in sigaction"); | |
27b012e2 MD |
449 | exit(-1); |
450 | } | |
02be5561 | 451 | assert(act.sa_sigaction == sigrcu_handler); |
16aa9ee8 | 452 | assert(cds_list_empty(®istry)); |
27b012e2 | 453 | } |
5e77fc1f | 454 | |
fdf01eed | 455 | #endif /* #ifdef RCU_SIGNAL */ |
5e77fc1f | 456 | |
5e6b23a6 | 457 | DEFINE_RCU_FLAVOR(rcu_flavor); |
541d828d | 458 | |
5e77fc1f | 459 | #include "urcu-call-rcu-impl.h" |
0376e7b2 | 460 | #include "urcu-defer-impl.h" |