Line data Source code
1 : //! A C-Rust shim: defines implementation of C walproposer API, assuming wp
2 : //! callback_data stores Box to some Rust implementation.
3 :
4 : #![allow(dead_code)]
5 :
6 : use std::ffi::{CStr, CString};
7 :
8 : use crate::bindings::{
9 : NeonWALReadResult, PGAsyncReadResult, PGAsyncWriteResult, Safekeeper, Size, StringInfoData,
10 : TimestampTz, WalProposer, WalProposerConnStatusType, WalProposerConnectPollStatusType,
11 : WalProposerExecStatusType, WalproposerShmemState, XLogRecPtr, uint32, walproposer_api,
12 : };
13 : use crate::walproposer::{ApiImpl, StreamingCallback, WaitResult};
14 :
15 786 : extern "C" fn get_shmem_state(wp: *mut WalProposer) -> *mut WalproposerShmemState {
16 : unsafe {
17 786 : let callback_data = (*(*wp).config).callback_data;
18 786 : let api = callback_data as *mut Box<dyn ApiImpl>;
19 786 : (*api).get_shmem_state()
20 : }
21 786 : }
22 :
23 115 : extern "C-unwind" fn start_streaming(wp: *mut WalProposer, startpos: XLogRecPtr) {
24 115 : unsafe {
25 115 : let callback_data = (*(*wp).config).callback_data;
26 115 : let api = callback_data as *mut Box<dyn ApiImpl>;
27 115 : let callback = StreamingCallback::new(wp);
28 115 : (*api).start_streaming(startpos, &callback);
29 115 : }
30 115 : }
31 :
32 115 : extern "C" fn get_flush_rec_ptr(wp: *mut WalProposer) -> XLogRecPtr {
33 : unsafe {
34 115 : let callback_data = (*(*wp).config).callback_data;
35 115 : let api = callback_data as *mut Box<dyn ApiImpl>;
36 115 : (*api).get_flush_rec_ptr()
37 : }
38 115 : }
39 :
40 765 : extern "C" fn update_donor(wp: *mut WalProposer, donor: *mut Safekeeper, donor_lsn: XLogRecPtr) {
41 : unsafe {
42 765 : let callback_data = (*(*wp).config).callback_data;
43 765 : let api = callback_data as *mut Box<dyn ApiImpl>;
44 765 : (*api).update_donor(&mut (*donor), donor_lsn)
45 : }
46 765 : }
47 :
48 316482 : extern "C" fn get_current_timestamp(wp: *mut WalProposer) -> TimestampTz {
49 : unsafe {
50 316482 : let callback_data = (*(*wp).config).callback_data;
51 316482 : let api = callback_data as *mut Box<dyn ApiImpl>;
52 316482 : (*api).get_current_timestamp()
53 : }
54 316482 : }
55 :
56 11246 : extern "C" fn conn_error_message(sk: *mut Safekeeper) -> *mut ::std::os::raw::c_char {
57 : unsafe {
58 11246 : let callback_data = (*(*(*sk).wp).config).callback_data;
59 11246 : let api = callback_data as *mut Box<dyn ApiImpl>;
60 11246 : let msg = (*api).conn_error_message(&mut (*sk));
61 11246 : let msg = CString::new(msg).unwrap();
62 : // TODO: fix leaking error message
63 11246 : msg.into_raw()
64 : }
65 11246 : }
66 :
67 33681 : extern "C" fn conn_status(sk: *mut Safekeeper) -> WalProposerConnStatusType {
68 : unsafe {
69 33681 : let callback_data = (*(*(*sk).wp).config).callback_data;
70 33681 : let api = callback_data as *mut Box<dyn ApiImpl>;
71 33681 : (*api).conn_status(&mut (*sk))
72 : }
73 33681 : }
74 :
75 33681 : extern "C" fn conn_connect_start(sk: *mut Safekeeper) {
76 : unsafe {
77 33681 : let callback_data = (*(*(*sk).wp).config).callback_data;
78 33681 : let api = callback_data as *mut Box<dyn ApiImpl>;
79 33681 : (*api).conn_connect_start(&mut (*sk))
80 : }
81 33681 : }
82 :
83 30266 : extern "C" fn conn_connect_poll(sk: *mut Safekeeper) -> WalProposerConnectPollStatusType {
84 : unsafe {
85 30266 : let callback_data = (*(*(*sk).wp).config).callback_data;
86 30266 : let api = callback_data as *mut Box<dyn ApiImpl>;
87 30266 : (*api).conn_connect_poll(&mut (*sk))
88 : }
89 30266 : }
90 :
91 30266 : extern "C" fn conn_send_query(sk: *mut Safekeeper, query: *mut ::std::os::raw::c_char) -> bool {
92 30266 : let query = unsafe { CStr::from_ptr(query) };
93 30266 : let query = query.to_str().unwrap();
94 :
95 : unsafe {
96 30266 : let callback_data = (*(*(*sk).wp).config).callback_data;
97 30266 : let api = callback_data as *mut Box<dyn ApiImpl>;
98 30266 : (*api).conn_send_query(&mut (*sk), query)
99 : }
100 30266 : }
101 :
102 30266 : extern "C" fn conn_get_query_result(sk: *mut Safekeeper) -> WalProposerExecStatusType {
103 : unsafe {
104 30266 : let callback_data = (*(*(*sk).wp).config).callback_data;
105 30266 : let api = callback_data as *mut Box<dyn ApiImpl>;
106 30266 : (*api).conn_get_query_result(&mut (*sk))
107 : }
108 30266 : }
109 :
110 0 : extern "C" fn conn_flush(sk: *mut Safekeeper) -> ::std::os::raw::c_int {
111 : unsafe {
112 0 : let callback_data = (*(*(*sk).wp).config).callback_data;
113 0 : let api = callback_data as *mut Box<dyn ApiImpl>;
114 0 : (*api).conn_flush(&mut (*sk))
115 : }
116 0 : }
117 :
118 11508 : extern "C" fn conn_finish(sk: *mut Safekeeper) {
119 : unsafe {
120 11508 : let callback_data = (*(*(*sk).wp).config).callback_data;
121 11508 : let api = callback_data as *mut Box<dyn ApiImpl>;
122 11508 : (*api).conn_finish(&mut (*sk))
123 : }
124 11508 : }
125 :
126 17793 : extern "C" fn conn_async_read(
127 17793 : sk: *mut Safekeeper,
128 17793 : buf: *mut *mut ::std::os::raw::c_char,
129 17793 : amount: *mut ::std::os::raw::c_int,
130 17793 : ) -> PGAsyncReadResult {
131 : unsafe {
132 17793 : let callback_data = (*(*(*sk).wp).config).callback_data;
133 17793 : let api = callback_data as *mut Box<dyn ApiImpl>;
134 :
135 : // This function has guarantee that returned buf will be valid until
136 : // the next call. So we can store a Vec in each Safekeeper and reuse
137 : // it on the next call.
138 17793 : let mut inbuf = take_vec_u8(&mut (*sk).inbuf).unwrap_or_default();
139 17793 : inbuf.clear();
140 :
141 17793 : let result = (*api).conn_async_read(&mut (*sk), &mut inbuf);
142 :
143 : // Put a Vec back to sk->inbuf and return data ptr.
144 17793 : *amount = inbuf.len() as i32;
145 17793 : *buf = store_vec_u8(&mut (*sk).inbuf, inbuf);
146 :
147 17793 : result
148 : }
149 17793 : }
150 :
151 4602 : extern "C" fn conn_async_write(
152 4602 : sk: *mut Safekeeper,
153 4602 : buf: *const ::std::os::raw::c_void,
154 4602 : size: usize,
155 4602 : ) -> PGAsyncWriteResult {
156 : unsafe {
157 4602 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
158 4602 : let callback_data = (*(*(*sk).wp).config).callback_data;
159 4602 : let api = callback_data as *mut Box<dyn ApiImpl>;
160 4602 : (*api).conn_async_write(&mut (*sk), buf)
161 : }
162 4602 : }
163 :
164 33414 : extern "C" fn conn_blocking_write(
165 33414 : sk: *mut Safekeeper,
166 33414 : buf: *const ::std::os::raw::c_void,
167 33414 : size: usize,
168 33414 : ) -> bool {
169 : unsafe {
170 33414 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
171 33414 : let callback_data = (*(*(*sk).wp).config).callback_data;
172 33414 : let api = callback_data as *mut Box<dyn ApiImpl>;
173 33414 : (*api).conn_blocking_write(&mut (*sk), buf)
174 : }
175 33414 : }
176 :
177 388 : extern "C-unwind" fn recovery_download(wp: *mut WalProposer, sk: *mut Safekeeper) -> bool {
178 : unsafe {
179 388 : let callback_data = (*(*(*sk).wp).config).callback_data;
180 388 : let api = callback_data as *mut Box<dyn ApiImpl>;
181 :
182 : // currently `recovery_download` is always called right after election
183 388 : (*api).after_election(&mut (*wp));
184 :
185 388 : (*api).recovery_download(&mut (*wp), &mut (*sk))
186 : }
187 388 : }
188 :
189 777 : extern "C" fn wal_reader_allocate(sk: *mut Safekeeper) {
190 777 : unsafe {
191 777 : let callback_data = (*(*(*sk).wp).config).callback_data;
192 777 : let api = callback_data as *mut Box<dyn ApiImpl>;
193 777 : (*api).wal_reader_allocate(&mut (*sk));
194 777 : }
195 777 : }
196 :
197 : #[allow(clippy::unnecessary_cast)]
198 1122 : extern "C" fn wal_read(
199 1122 : sk: *mut Safekeeper,
200 1122 : buf: *mut ::std::os::raw::c_char,
201 1122 : startptr: XLogRecPtr,
202 1122 : count: Size,
203 1122 : _errmsg: *mut *mut ::std::os::raw::c_char,
204 1122 : ) -> NeonWALReadResult {
205 : unsafe {
206 1122 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, count);
207 1122 : let callback_data = (*(*(*sk).wp).config).callback_data;
208 1122 : let api = callback_data as *mut Box<dyn ApiImpl>;
209 : // TODO: errmsg is not forwarded
210 1122 : (*api).wal_read(&mut (*sk), buf, startptr)
211 : }
212 1122 : }
213 :
214 18494 : extern "C" fn wal_reader_events(sk: *mut Safekeeper) -> uint32 {
215 : unsafe {
216 18494 : let callback_data = (*(*(*sk).wp).config).callback_data;
217 18494 : let api = callback_data as *mut Box<dyn ApiImpl>;
218 18494 : (*api).wal_reader_events(&mut (*sk))
219 : }
220 18494 : }
221 :
222 9049 : extern "C" fn init_event_set(wp: *mut WalProposer) {
223 9049 : unsafe {
224 9049 : let callback_data = (*(*wp).config).callback_data;
225 9049 : let api = callback_data as *mut Box<dyn ApiImpl>;
226 9049 : (*api).init_event_set(&mut (*wp));
227 9049 : }
228 9049 : }
229 :
230 65445 : extern "C" fn update_event_set(sk: *mut Safekeeper, events: uint32) {
231 65445 : unsafe {
232 65445 : let callback_data = (*(*(*sk).wp).config).callback_data;
233 65445 : let api = callback_data as *mut Box<dyn ApiImpl>;
234 65445 : (*api).update_event_set(&mut (*sk), events);
235 65445 : }
236 65445 : }
237 :
238 6011 : extern "C" fn active_state_update_event_set(sk: *mut Safekeeper) {
239 6011 : unsafe {
240 6011 : let callback_data = (*(*(*sk).wp).config).callback_data;
241 6011 : let api = callback_data as *mut Box<dyn ApiImpl>;
242 6011 : (*api).active_state_update_event_set(&mut (*sk));
243 6011 : }
244 6011 : }
245 :
246 60532 : extern "C" fn add_safekeeper_event_set(sk: *mut Safekeeper, events: uint32) {
247 60532 : unsafe {
248 60532 : let callback_data = (*(*(*sk).wp).config).callback_data;
249 60532 : let api = callback_data as *mut Box<dyn ApiImpl>;
250 60532 : (*api).add_safekeeper_event_set(&mut (*sk), events);
251 60532 : }
252 60532 : }
253 :
254 38359 : extern "C" fn rm_safekeeper_event_set(sk: *mut Safekeeper) {
255 38359 : unsafe {
256 38359 : let callback_data = (*(*(*sk).wp).config).callback_data;
257 38359 : let api = callback_data as *mut Box<dyn ApiImpl>;
258 38359 : (*api).rm_safekeeper_event_set(&mut (*sk));
259 38359 : }
260 38359 : }
261 :
262 88281 : extern "C-unwind" fn wait_event_set(
263 88281 : wp: *mut WalProposer,
264 88281 : timeout: ::std::os::raw::c_long,
265 88281 : event_sk: *mut *mut Safekeeper,
266 88281 : events: *mut uint32,
267 88281 : ) -> ::std::os::raw::c_int {
268 : unsafe {
269 88281 : let callback_data = (*(*wp).config).callback_data;
270 88281 : let api = callback_data as *mut Box<dyn ApiImpl>;
271 88281 : let result = (*api).wait_event_set(&mut (*wp), timeout);
272 88281 : match result {
273 : WaitResult::Latch => {
274 9204 : *event_sk = std::ptr::null_mut();
275 9204 : *events = crate::bindings::WL_LATCH_SET;
276 9204 : 1
277 : }
278 : WaitResult::Timeout => {
279 2817 : *event_sk = std::ptr::null_mut();
280 : // WaitEventSetWait returns 0 for timeout.
281 2817 : *events = 0;
282 2817 : 0
283 : }
284 76260 : WaitResult::Network(sk, event_mask) => {
285 76260 : *event_sk = sk;
286 76260 : *events = event_mask;
287 76260 : 1
288 : }
289 : }
290 : }
291 88281 : }
292 :
293 0 : extern "C" fn strong_random(
294 0 : wp: *mut WalProposer,
295 0 : buf: *mut ::std::os::raw::c_void,
296 0 : len: usize,
297 0 : ) -> bool {
298 : unsafe {
299 0 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, len);
300 0 : let callback_data = (*(*wp).config).callback_data;
301 0 : let api = callback_data as *mut Box<dyn ApiImpl>;
302 0 : (*api).strong_random(buf)
303 : }
304 0 : }
305 :
306 178 : extern "C" fn get_redo_start_lsn(wp: *mut WalProposer) -> XLogRecPtr {
307 : unsafe {
308 178 : let callback_data = (*(*wp).config).callback_data;
309 178 : let api = callback_data as *mut Box<dyn ApiImpl>;
310 178 : (*api).get_redo_start_lsn()
311 : }
312 178 : }
313 :
314 273 : unsafe extern "C-unwind" fn finish_sync_safekeepers(wp: *mut WalProposer, lsn: XLogRecPtr) -> ! {
315 : unsafe {
316 273 : let callback_data = (*(*wp).config).callback_data;
317 273 : let api = callback_data as *mut Box<dyn ApiImpl>;
318 273 : (*api).finish_sync_safekeepers(lsn)
319 : }
320 : }
321 :
322 2368 : extern "C" fn process_safekeeper_feedback(wp: *mut WalProposer, sk: *mut Safekeeper) {
323 2368 : unsafe {
324 2368 : let callback_data = (*(*wp).config).callback_data;
325 2368 : let api = callback_data as *mut Box<dyn ApiImpl>;
326 2368 : (*api).process_safekeeper_feedback(&mut (*wp), &mut (*sk));
327 2368 : }
328 2368 : }
329 :
330 148836 : extern "C-unwind" fn log_internal(
331 148836 : wp: *mut WalProposer,
332 148836 : level: ::std::os::raw::c_int,
333 148836 : line: *const ::std::os::raw::c_char,
334 148836 : ) {
335 : unsafe {
336 148836 : let callback_data = (*(*wp).config).callback_data;
337 148836 : let api = callback_data as *mut Box<dyn ApiImpl>;
338 148836 : let line = CStr::from_ptr(line);
339 148836 : let line = line.to_str().unwrap();
340 148836 : (*api).log_internal(&mut (*wp), Level::from(level as u32), line)
341 : }
342 148836 : }
343 :
344 : /* BEGIN_HADRON */
345 9049 : extern "C" fn reset_safekeeper_statuses_for_metrics(wp: *mut WalProposer, num_safekeepers: u32) {
346 : unsafe {
347 9049 : let callback_data = (*(*wp).config).callback_data;
348 9049 : let api = callback_data as *mut Box<dyn ApiImpl>;
349 9049 : if api.is_null() {
350 0 : return;
351 9049 : }
352 9049 : (*api).reset_safekeeper_statuses_for_metrics(&mut (*wp), num_safekeepers);
353 : }
354 9049 : }
355 :
356 8870 : extern "C" fn update_safekeeper_status_for_metrics(
357 8870 : wp: *mut WalProposer,
358 8870 : sk_index: u32,
359 8870 : status: u8,
360 8870 : ) {
361 : unsafe {
362 8870 : let callback_data = (*(*wp).config).callback_data;
363 8870 : let api = callback_data as *mut Box<dyn ApiImpl>;
364 8870 : if api.is_null() {
365 0 : return;
366 8870 : }
367 8870 : (*api).update_safekeeper_status_for_metrics(&mut (*wp), sk_index, status);
368 : }
369 8870 : }
370 : /* END_HADRON */
371 :
372 : #[derive(Debug, PartialEq)]
373 : pub enum Level {
374 : Debug5,
375 : Debug4,
376 : Debug3,
377 : Debug2,
378 : Debug1,
379 : Log,
380 : Info,
381 : Notice,
382 : Warning,
383 : Error,
384 : Fatal,
385 : Panic,
386 : WPEvent,
387 : }
388 :
389 : impl Level {
390 148836 : pub fn from(elevel: u32) -> Level {
391 : use crate::bindings::*;
392 :
393 148836 : match elevel {
394 3825 : DEBUG5 => Level::Debug5,
395 0 : DEBUG4 => Level::Debug4,
396 0 : DEBUG3 => Level::Debug3,
397 2368 : DEBUG2 => Level::Debug2,
398 0 : DEBUG1 => Level::Debug1,
399 129829 : LOG => Level::Log,
400 0 : INFO => Level::Info,
401 0 : NOTICE => Level::Notice,
402 12765 : WARNING => Level::Warning,
403 0 : ERROR => Level::Error,
404 44 : FATAL => Level::Fatal,
405 5 : PANIC => Level::Panic,
406 0 : WPEVENT => Level::WPEvent,
407 0 : _ => panic!("unknown log level {elevel}"),
408 : }
409 148836 : }
410 : }
411 :
412 9049 : pub(crate) fn create_api() -> walproposer_api {
413 9049 : walproposer_api {
414 9049 : get_shmem_state: Some(get_shmem_state),
415 9049 : start_streaming: Some(start_streaming),
416 9049 : get_flush_rec_ptr: Some(get_flush_rec_ptr),
417 9049 : update_donor: Some(update_donor),
418 9049 : get_current_timestamp: Some(get_current_timestamp),
419 9049 : conn_error_message: Some(conn_error_message),
420 9049 : conn_status: Some(conn_status),
421 9049 : conn_connect_start: Some(conn_connect_start),
422 9049 : conn_connect_poll: Some(conn_connect_poll),
423 9049 : conn_send_query: Some(conn_send_query),
424 9049 : conn_get_query_result: Some(conn_get_query_result),
425 9049 : conn_flush: Some(conn_flush),
426 9049 : conn_finish: Some(conn_finish),
427 9049 : conn_async_read: Some(conn_async_read),
428 9049 : conn_async_write: Some(conn_async_write),
429 9049 : conn_blocking_write: Some(conn_blocking_write),
430 9049 : recovery_download: Some(recovery_download),
431 9049 : wal_reader_allocate: Some(wal_reader_allocate),
432 9049 : wal_read: Some(wal_read),
433 9049 : wal_reader_events: Some(wal_reader_events),
434 9049 : init_event_set: Some(init_event_set),
435 9049 : update_event_set: Some(update_event_set),
436 9049 : active_state_update_event_set: Some(active_state_update_event_set),
437 9049 : add_safekeeper_event_set: Some(add_safekeeper_event_set),
438 9049 : rm_safekeeper_event_set: Some(rm_safekeeper_event_set),
439 9049 : wait_event_set: Some(wait_event_set),
440 9049 : strong_random: Some(strong_random),
441 9049 : get_redo_start_lsn: Some(get_redo_start_lsn),
442 9049 : finish_sync_safekeepers: Some(finish_sync_safekeepers),
443 9049 : process_safekeeper_feedback: Some(process_safekeeper_feedback),
444 9049 : log_internal: Some(log_internal),
445 9049 : /* BEGIN_HADRON */
446 9049 : reset_safekeeper_statuses_for_metrics: Some(reset_safekeeper_statuses_for_metrics),
447 9049 : update_safekeeper_status_for_metrics: Some(update_safekeeper_status_for_metrics),
448 9049 : /* END_HADRON */
449 9049 : }
450 9049 : }
451 :
452 9049 : pub fn empty_shmem() -> crate::bindings::WalproposerShmemState {
453 9049 : let empty_feedback = crate::bindings::PageserverFeedback {
454 9049 : present: false,
455 9049 : currentClusterSize: 0,
456 9049 : last_received_lsn: 0,
457 9049 : disk_consistent_lsn: 0,
458 9049 : remote_consistent_lsn: 0,
459 9049 : replytime: 0,
460 9049 : shard_number: 0,
461 9049 : corruption_detected: false,
462 9049 : };
463 :
464 9049 : let empty_wal_rate_limiter = crate::bindings::WalRateLimiter {
465 9049 : effective_max_wal_bytes_per_second: crate::bindings::pg_atomic_uint32 { value: 0 },
466 9049 : should_limit: crate::bindings::pg_atomic_uint32 { value: 0 },
467 9049 : sent_bytes: 0,
468 9049 : batch_start_time_us: crate::bindings::pg_atomic_uint64 { value: 0 },
469 9049 : batch_end_time_us: crate::bindings::pg_atomic_uint64 { value: 0 },
470 9049 : };
471 :
472 9049 : crate::bindings::WalproposerShmemState {
473 9049 : propEpochStartLsn: crate::bindings::pg_atomic_uint64 { value: 0 },
474 9049 : donor_name: [0; 64],
475 9049 : donor_conninfo: [0; 1024],
476 9049 : donor_lsn: 0,
477 9049 : mutex: 0,
478 9049 : mineLastElectedTerm: crate::bindings::pg_atomic_uint64 { value: 0 },
479 9049 : backpressureThrottlingTime: crate::bindings::pg_atomic_uint64 { value: 0 },
480 9049 : currentClusterSize: crate::bindings::pg_atomic_uint64 { value: 0 },
481 9049 : shard_ps_feedback: [empty_feedback; 128],
482 9049 : num_shards: 0,
483 9049 : replica_promote: false,
484 9049 : min_ps_feedback: empty_feedback,
485 9049 : wal_rate_limiter: empty_wal_rate_limiter,
486 9049 : num_safekeepers: 0,
487 9049 : safekeeper_status: [0; 32],
488 9049 : }
489 9049 : }
490 :
491 : impl std::fmt::Display for Level {
492 693 : fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
493 693 : write!(f, "{self:?}")
494 693 : }
495 : }
496 :
497 : /// Take ownership of `Vec<u8>` from StringInfoData.
498 : #[allow(clippy::unnecessary_cast)]
499 44932 : pub(crate) fn take_vec_u8(pg: &mut StringInfoData) -> Option<Vec<u8>> {
500 44932 : if pg.data.is_null() {
501 27145 : return None;
502 17787 : }
503 :
504 17787 : let ptr = pg.data as *mut u8;
505 17787 : let length = pg.len as usize;
506 17787 : let capacity = pg.maxlen as usize;
507 :
508 17787 : pg.data = std::ptr::null_mut();
509 17787 : pg.len = 0;
510 17787 : pg.maxlen = 0;
511 :
512 17787 : unsafe { Some(Vec::from_raw_parts(ptr, length, capacity)) }
513 44932 : }
514 :
515 : /// Store `Vec<u8>` in StringInfoData.
516 17793 : fn store_vec_u8(pg: &mut StringInfoData, vec: Vec<u8>) -> *mut ::std::os::raw::c_char {
517 17793 : let ptr = vec.as_ptr() as *mut ::std::os::raw::c_char;
518 17793 : let length = vec.len();
519 17793 : let capacity = vec.capacity();
520 :
521 17793 : assert!(pg.data.is_null());
522 :
523 17793 : pg.data = ptr;
524 17793 : pg.len = length as i32;
525 17793 : pg.maxlen = capacity as i32;
526 :
527 17793 : std::mem::forget(vec);
528 :
529 17793 : ptr
530 17793 : }
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