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Comparing libev/ev_linuxaio.c (file contents):
Revision 1.29 by root, Tue Jun 25 06:43:04 2019 UTC vs.
Revision 1.54 by sf-exg, Sun May 14 19:02:31 2023 UTC

… …
91/*****************************************************************************/ 91/*****************************************************************************/
92/* syscall wrapdadoop - this section has the raw api/abi definitions */ 92/* syscall wrapdadoop - this section has the raw api/abi definitions */
93 93
94#include <sys/syscall.h> /* no glibc wrappers */ 94#include <sys/syscall.h> /* no glibc wrappers */
95 95
96/* aio_abi.h is not versioned in any way, so we cannot test for its existance */ 96/* aio_abi.h is not versioned in any way, so we cannot test for its existence */
97#define IOCB_CMD_POLL 5 97#define IOCB_CMD_POLL 5
98 98
99/* taken from linux/fs/aio.c. yup, that's a .c file. 99/* taken from linux/fs/aio.c. yup, that's a .c file.
100 * not only is this totally undocumented, not even the source code 100 * not only is this totally undocumented, not even the source code
101 * can tell you what the future semantics of compat_features and 101 * can tell you what the future semantics of compat_features and
102 * incompat_features are, or what header_length actually is for. 102 * incompat_features are, or what header_length actually is for.
103 */ 103 */
104#define AIO_RING_MAGIC 0xa10a10a1 104#define AIO_RING_MAGIC 0xa10a10a1
105#define AIO_RING_INCOMPAT_FEATURES 0 105#define EV_AIO_RING_INCOMPAT_FEATURES 0
106struct aio_ring 106struct aio_ring
107{ 107{
108 unsigned id; /* kernel internal index number */ 108 unsigned id; /* kernel internal index number */
109 unsigned nr; /* number of io_events */ 109 unsigned nr; /* number of io_events */
110 unsigned head; /* Written to by userland or by kernel. */ 110 unsigned head; /* Written to by userland or by kernel. */
… …
120 120
121inline_size 121inline_size
122int 122int
123evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp) 123evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp)
124{ 124{
125 return syscall (SYS_io_setup, nr_events, ctx_idp); 125 return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp);
126} 126}
127 127
128inline_size 128inline_size
129int 129int
130evsys_io_destroy (aio_context_t ctx_id) 130evsys_io_destroy (aio_context_t ctx_id)
131{ 131{
132 return syscall (SYS_io_destroy, ctx_id); 132 return ev_syscall1 (SYS_io_destroy, ctx_id);
133} 133}
134 134
135inline_size 135inline_size
136int 136int
137evsys_io_submit (aio_context_t ctx_id, long nr, struct iocb *cbp[]) 137evsys_io_submit (aio_context_t ctx_id, long nr, struct iocb *cbp[])
138{ 138{
139 return syscall (SYS_io_submit, ctx_id, nr, cbp); 139 return ev_syscall3 (SYS_io_submit, ctx_id, nr, cbp);
140} 140}
141 141
142inline_size 142inline_size
143int 143int
144evsys_io_cancel (aio_context_t ctx_id, struct iocb *cbp, struct io_event *result) 144evsys_io_cancel (aio_context_t ctx_id, struct iocb *cbp, struct io_event *result)
145{ 145{
146 return syscall (SYS_io_cancel, ctx_id, cbp, result); 146 return ev_syscall3 (SYS_io_cancel, ctx_id, cbp, result);
147} 147}
148 148
149inline_size 149inline_size
150int 150int
151evsys_io_getevents (aio_context_t ctx_id, long min_nr, long nr, struct io_event *events, struct timespec *timeout) 151evsys_io_getevents (aio_context_t ctx_id, long min_nr, long nr, struct io_event *events, struct timespec *timeout)
152{ 152{
153 return syscall (SYS_io_getevents, ctx_id, min_nr, nr, events, timeout); 153 return ev_syscall5 (SYS_io_getevents, ctx_id, min_nr, nr, events, timeout);
154} 154}
155 155
156/*****************************************************************************/ 156/*****************************************************************************/
157/* actual backed implementation */ 157/* actual backed implementation */
158 158
… …
212 * this is not well documented, so we better do it. 212 * this is not well documented, so we better do it.
213 */ 213 */
214 memset (iocb, 0, sizeof (*iocb)); 214 memset (iocb, 0, sizeof (*iocb));
215 215
216 iocb->io.aio_lio_opcode = IOCB_CMD_POLL; 216 iocb->io.aio_lio_opcode = IOCB_CMD_POLL;
217 iocb->io.aio_data = offset;
218 iocb->io.aio_fildes = offset; 217 iocb->io.aio_fildes = offset;
219 218
220 base [offset++] = iocb; 219 base [offset++] = iocb;
221 } 220 }
222} 221}
… …
234static void 233static void
235linuxaio_modify (EV_P_ int fd, int oev, int nev) 234linuxaio_modify (EV_P_ int fd, int oev, int nev)
236{ 235{
237 array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp); 236 array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp);
238 ANIOCBP iocb = linuxaio_iocbps [fd]; 237 ANIOCBP iocb = linuxaio_iocbps [fd];
238 ANFD *anfd = &anfds [fd];
239 239
240 if (iocb->io.aio_reqprio < 0) 240 if (ecb_expect_false (iocb->io.aio_reqprio < 0))
241 { 241 {
242 /* we handed this fd over to epoll, so undo this first */ 242 /* we handed this fd over to epoll, so undo this first */
243 /* we do it manually because the optimisations on epoll_modfy won't do us any good */ 243 /* we do it manually because the optimisations on epoll_modify won't do us any good */
244 epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0); 244 epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0);
245 anfd->emask = 0;
245 iocb->io.aio_reqprio = 0; 246 iocb->io.aio_reqprio = 0;
246 } 247 }
247 248 else if (ecb_expect_false (iocb->io.aio_buf))
248 if (iocb->io.aio_buf) 249 {
249 /* io_cancel always returns some error on relevant kernels, but works */ 250 /* iocb active, so cancel it first before resubmit */
251 /* this assumes we only ever get one call per fd per loop iteration */
252 for (;;)
253 {
254 /* on all relevant kernels, io_cancel fails with EINPROGRESS on "success" */
250 evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0); 255 if (ecb_expect_false (evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0) == 0))
256 break;
257
258 if (ecb_expect_true (errno == EINPROGRESS))
259 break;
260
261 /* the EINPROGRESS test is for nicer error message. clumsy. */
262 if (errno != EINTR)
263 {
264 assert (("libev: linuxaio unexpected io_cancel failed", errno != EINTR && errno != EINPROGRESS));
265 break;
266 }
267 }
268
269 /* increment generation counter to avoid handling old events */
270 ++anfd->egen;
271 }
272
273 iocb->io.aio_buf = (nev & EV_READ ? POLLIN : 0)
274 | (nev & EV_WRITE ? POLLOUT : 0);
251 275
252 if (nev) 276 if (nev)
253 { 277 {
254 iocb->io.aio_buf = 278 iocb->io.aio_data = (uint32_t)fd | ((__u64)(uint32_t)anfd->egen << 32);
255 (nev & EV_READ ? POLLIN : 0)
256 | (nev & EV_WRITE ? POLLOUT : 0);
257 279
258 /* queue iocb up for io_submit */ 280 /* queue iocb up for io_submit */
259 /* this assumes we only ever get one call per fd per loop iteration */ 281 /* this assumes we only ever get one call per fd per loop iteration */
260 ++linuxaio_submitcnt; 282 ++linuxaio_submitcnt;
261 array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit); 283 array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit);
… …
267linuxaio_epoll_cb (EV_P_ struct ev_io *w, int revents) 289linuxaio_epoll_cb (EV_P_ struct ev_io *w, int revents)
268{ 290{
269 epoll_poll (EV_A_ 0); 291 epoll_poll (EV_A_ 0);
270} 292}
271 293
272static void 294inline_speed
295void
273linuxaio_fd_rearm (EV_P_ int fd) 296linuxaio_fd_rearm (EV_P_ int fd)
274{ 297{
275 anfds [fd].events = 0; 298 anfds [fd].events = 0;
276 linuxaio_iocbps [fd]->io.aio_buf = 0; 299 linuxaio_iocbps [fd]->io.aio_buf = 0;
277 fd_change (EV_A_ fd, EV_ANFD_REIFY); 300 fd_change (EV_A_ fd, EV_ANFD_REIFY);
… …
280static void 303static void
281linuxaio_parse_events (EV_P_ struct io_event *ev, int nr) 304linuxaio_parse_events (EV_P_ struct io_event *ev, int nr)
282{ 305{
283 while (nr) 306 while (nr)
284 { 307 {
285 int fd = ev->data; 308 int fd = ev->data & 0xffffffff;
309 uint32_t gen = ev->data >> 32;
286 int res = ev->res; 310 int res = ev->res;
287 311
288 assert (("libev: iocb fd must be in-bounds", fd >= 0 && fd < anfdmax)); 312 assert (("libev: iocb fd must be in-bounds", fd >= 0 && fd < anfdmax));
289 313
314 /* only accept events if generation counter matches */
315 if (ecb_expect_true (gen == (uint32_t)anfds [fd].egen))
316 {
290 /* feed events, we do not expect or handle POLLNVAL */ 317 /* feed events, we do not expect or handle POLLNVAL */
291 fd_event ( 318 fd_event (
292 EV_A_ 319 EV_A_
293 fd, 320 fd,
294 (res & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) 321 (res & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
295 | (res & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) 322 | (res & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
296 ); 323 );
297 324
298 /* linux aio is oneshot: rearm fd. TODO: this does more work than needed */ 325 /* linux aio is oneshot: rearm fd. TODO: this does more work than strictly needed */
299 linuxaio_fd_rearm (EV_A_ fd); 326 linuxaio_fd_rearm (EV_A_ fd);
327 }
300 328
301 --nr; 329 --nr;
302 ++ev; 330 ++ev;
303 } 331 }
304} 332}
… …
306/* get any events from ring buffer, return true if any were handled */ 334/* get any events from ring buffer, return true if any were handled */
307static int 335static int
308linuxaio_get_events_from_ring (EV_P) 336linuxaio_get_events_from_ring (EV_P)
309{ 337{
310 struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; 338 struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx;
339 unsigned head, tail;
311 340
312 /* the kernel reads and writes both of these variables, */ 341 /* the kernel reads and writes both of these variables, */
313 /* as a C extension, we assume that volatile use here */ 342 /* as a C extension, we assume that volatile use here */
314 /* both makes reads atomic and once-only */ 343 /* both makes reads atomic and once-only */
315 unsigned head = *(volatile unsigned *)&ring->head; 344 head = *(volatile unsigned *)&ring->head;
345 ECB_MEMORY_FENCE_ACQUIRE;
316 unsigned tail = *(volatile unsigned *)&ring->tail; 346 tail = *(volatile unsigned *)&ring->tail;
317 347
318 if (head == tail) 348 if (head == tail)
319 return 0; 349 return 0;
320 350
321 /* bail out if the ring buffer doesn't match the expected layout */
322 if (expect_false (ring->magic != AIO_RING_MAGIC)
323 || ring->incompat_features != AIO_RING_INCOMPAT_FEATURES
324 || ring->header_length != sizeof (struct aio_ring)) /* TODO: or use it to find io_event[0]? */
325 return 0;
326
327 /* make sure the events up to tail are visible */
328 ECB_MEMORY_FENCE_ACQUIRE;
329
330 /* parse all available events, but only once, to avoid starvation */ 351 /* parse all available events, but only once, to avoid starvation */
331 if (tail > head) /* normal case around */ 352 if (ecb_expect_true (tail > head)) /* normal case around */
332 linuxaio_parse_events (EV_A_ ring->io_events + head, tail - head); 353 linuxaio_parse_events (EV_A_ ring->io_events + head, tail - head);
333 else /* wrapped around */ 354 else /* wrapped around */
334 { 355 {
335 linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head); 356 linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head);
336 linuxaio_parse_events (EV_A_ ring->io_events, tail); 357 linuxaio_parse_events (EV_A_ ring->io_events, tail);
… …
341 *(volatile unsigned *)&ring->head = tail; 362 *(volatile unsigned *)&ring->head = tail;
342 363
343 return 1; 364 return 1;
344} 365}
345 366
367inline_size
368int
369linuxaio_ringbuf_valid (EV_P)
370{
371 struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx;
372
373 return ecb_expect_true (ring->magic == AIO_RING_MAGIC)
374 && ring->incompat_features == EV_AIO_RING_INCOMPAT_FEATURES
375 && ring->header_length == sizeof (struct aio_ring); /* TODO: or use it to find io_event[0]? */
376}
377
346/* read at least one event from kernel, or timeout */ 378/* read at least one event from kernel, or timeout */
347inline_size 379inline_size
348void 380void
349linuxaio_get_events (EV_P_ ev_tstamp timeout) 381linuxaio_get_events (EV_P_ ev_tstamp timeout)
350{ 382{
351 struct timespec ts; 383 struct timespec ts;
352 struct io_event ioev[1]; 384 struct io_event ioev[8]; /* 256 octet stack space */
353 int res; 385 int want = 1; /* how many events to request */
386 int ringbuf_valid = linuxaio_ringbuf_valid (EV_A);
354 387
388 if (ecb_expect_true (ringbuf_valid))
389 {
390 /* if the ring buffer has any events, we don't wait or call the kernel at all */
355 if (linuxaio_get_events_from_ring (EV_A)) 391 if (linuxaio_get_events_from_ring (EV_A))
356 return; 392 return;
357 393
358 /* no events, so wait for at least one, then poll ring buffer again */ 394 /* if the ring buffer is empty, and we don't have a timeout, then don't call the kernel */
359 /* this degrades to one event per loop iteration */ 395 if (!timeout)
360 /* if the ring buffer changes layout, but so be it */ 396 return;
397 }
398 else
399 /* no ringbuffer, request slightly larger batch */
400 want = sizeof (ioev) / sizeof (ioev [0]);
361 401
402 /* no events, so wait for some
403 * for fairness reasons, we do this in a loop, to fetch all events
404 */
405 for (;;)
406 {
407 int res;
408
362 EV_RELEASE_CB; 409 EV_RELEASE_CB;
363 410
364 ts.tv_sec = (long)timeout; 411 EV_TS_SET (ts, timeout);
365 ts.tv_nsec = (long)((timeout - ts.tv_sec) * 1e9); 412 res = evsys_io_getevents (linuxaio_ctx, 1, want, ioev, &ts);
366 413
367 res = evsys_io_getevents (linuxaio_ctx, 1, sizeof (ioev) / sizeof (ioev [0]), ioev, &ts);
368
369 EV_ACQUIRE_CB; 414 EV_ACQUIRE_CB;
370 415
371 if (res < 0) 416 if (res < 0)
372 if (errno == EINTR) 417 if (errno == EINTR)
373 /* ignored */; 418 /* ignored, retry */;
374 else 419 else
375 ev_syserr ("(libev) linuxaio io_getevents"); 420 ev_syserr ("(libev) linuxaio io_getevents");
376 else if (res) 421 else if (res)
377 { 422 {
378 /* at least one event received, handle it and any remaining ones in the ring buffer */ 423 /* at least one event available, handle them */
379 linuxaio_parse_events (EV_A_ ioev, res); 424 linuxaio_parse_events (EV_A_ ioev, res);
425
426 if (ecb_expect_true (ringbuf_valid))
427 {
428 /* if we have a ring buffer, handle any remaining events in it */
380 linuxaio_get_events_from_ring (EV_A); 429 linuxaio_get_events_from_ring (EV_A);
381 }
382}
383 430
384static int 431 /* at this point, we should have handled all outstanding events */
432 break;
433 }
434 else if (res < want)
435 /* otherwise, if there were fewere events than we wanted, we assume there are no more */
436 break;
437 }
438 else
439 break; /* no events from the kernel, we are done */
440
441 timeout = EV_TS_CONST (0.); /* only wait in the first iteration */
442 }
443}
444
445inline_size
446int
385linuxaio_io_setup (EV_P) 447linuxaio_io_setup (EV_P)
386{ 448{
387 linuxaio_ctx = 0; 449 linuxaio_ctx = 0;
388 return evsys_io_setup (linuxaio_nr_events (EV_A), &linuxaio_ctx); 450 return evsys_io_setup (linuxaio_nr_events (EV_A), &linuxaio_ctx);
389} 451}
… …
400 /* which allows us to pinpoint the erroneous iocb */ 462 /* which allows us to pinpoint the erroneous iocb */
401 for (submitted = 0; submitted < linuxaio_submitcnt; ) 463 for (submitted = 0; submitted < linuxaio_submitcnt; )
402 { 464 {
403 int res = evsys_io_submit (linuxaio_ctx, linuxaio_submitcnt - submitted, linuxaio_submits + submitted); 465 int res = evsys_io_submit (linuxaio_ctx, linuxaio_submitcnt - submitted, linuxaio_submits + submitted);
404 466
405 if (expect_false (res < 0)) 467 if (ecb_expect_false (res < 0))
406 if (errno == EINVAL) 468 if (errno == EINVAL)
407 { 469 {
408 /* This happens for unsupported fds, officially, but in my testing, 470 /* This happens for unsupported fds, officially, but in my testing,
409 * also randomly happens for supported fds. We fall back to good old 471 * also randomly happens for supported fds. We fall back to good old
410 * poll() here, under the assumption that this is a very rare case. 472 * poll() here, under the assumption that this is a very rare case.
… …
440 } 502 }
441 503
442 ++linuxaio_iteration; 504 ++linuxaio_iteration;
443 if (linuxaio_io_setup (EV_A) < 0) 505 if (linuxaio_io_setup (EV_A) < 0)
444 { 506 {
507 /* TODO: rearm all and recreate epoll backend from scratch */
508 /* TODO: might be more prudent? */
509
445 /* to bad, we can't get a new aio context, go 100% epoll */ 510 /* to bad, we can't get a new aio context, go 100% epoll */
446 linuxaio_free_iocbp (EV_A); 511 linuxaio_free_iocbp (EV_A);
447 ev_io_stop (EV_A_ &linuxaio_epoll_w); 512 ev_io_stop (EV_A_ &linuxaio_epoll_w);
448 ev_ref (EV_A); 513 ev_ref (EV_A);
449 linuxaio_ctx = 0; 514 linuxaio_ctx = 0;
515
516 backend = EVBACKEND_EPOLL;
450 backend_modify = epoll_modify; 517 backend_modify = epoll_modify;
451 backend_poll = epoll_poll; 518 backend_poll = epoll_poll;
452 } 519 }
453 520
454 timeout = 0; 521 timeout = EV_TS_CONST (0.);
455 /* it's easiest to handle this mess in another iteration */ 522 /* it's easiest to handle this mess in another iteration */
456 return; 523 return;
457 } 524 }
458 else if (errno == EBADF) 525 else if (errno == EBADF)
459 { 526 {
527 assert (("libev: event loop rejected bad fd", errno != EBADF));
460 fd_kill (EV_A_ linuxaio_submits [submitted]->aio_fildes); 528 fd_kill (EV_A_ linuxaio_submits [submitted]->aio_fildes);
461 529
462 res = 1; /* skip this iocb */ 530 res = 1; /* skip this iocb */
463 } 531 }
532 else if (errno == EINTR) /* not seen in reality, not documented */
533 res = 0; /* silently ignore and retry */
464 else 534 else
535 {
465 ev_syserr ("(libev) linuxaio io_submit"); 536 ev_syserr ("(libev) linuxaio io_submit");
537 res = 0;
538 }
466 539
467 submitted += res; 540 submitted += res;
468 } 541 }
469 542
470 linuxaio_submitcnt = 0; 543 linuxaio_submitcnt = 0;
… …
493 { 566 {
494 epoll_destroy (EV_A); 567 epoll_destroy (EV_A);
495 return 0; 568 return 0;
496 } 569 }
497 570
498 ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); 571 ev_io_init (&linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ);
499 ev_set_priority (&linuxaio_epoll_w, EV_MAXPRI); 572 ev_set_priority (&linuxaio_epoll_w, EV_MAXPRI);
500 ev_io_start (EV_A_ &linuxaio_epoll_w); 573 ev_io_start (EV_A_ &linuxaio_epoll_w);
501 ev_unref (EV_A); /* watcher should not keep loop alive */ 574 ev_unref (EV_A); /* watcher should not keep loop alive */
502 575
503 backend_modify = linuxaio_modify; 576 backend_modify = linuxaio_modify;
504 backend_poll = linuxaio_poll; 577 backend_poll = linuxaio_poll;
505 578
506 linuxaio_iocbpmax = 0; 579 linuxaio_iocbpmax = 0;
507 linuxaio_iocbps = 0; 580 linuxaio_iocbps = 0;
508 581
509 linuxaio_submits = 0; 582 linuxaio_submits = 0;
… …
517void 590void
518linuxaio_destroy (EV_P) 591linuxaio_destroy (EV_P)
519{ 592{
520 epoll_destroy (EV_A); 593 epoll_destroy (EV_A);
521 linuxaio_free_iocbp (EV_A); 594 linuxaio_free_iocbp (EV_A);
522 evsys_io_destroy (linuxaio_ctx); 595 evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */
523} 596}
524 597
525inline_size 598ecb_cold
526void 599static void
527linuxaio_fork (EV_P) 600linuxaio_fork (EV_P)
528{ 601{
529 /* this frees all iocbs, which is very heavy-handed */
530 linuxaio_destroy (EV_A);
531 linuxaio_submitcnt = 0; /* all pointers were invalidated */ 602 linuxaio_submitcnt = 0; /* all pointers were invalidated */
603 linuxaio_free_iocbp (EV_A); /* this frees all iocbs, which is very heavy-handed */
604 evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */
532 605
533 linuxaio_iteration = 0; /* we start over in the child */ 606 linuxaio_iteration = 0; /* we start over in the child */
534 607
535 while (linuxaio_io_setup (EV_A) < 0) 608 while (linuxaio_io_setup (EV_A) < 0)
536 ev_syserr ("(libev) linuxaio io_setup"); 609 ev_syserr ("(libev) linuxaio io_setup");
537 610
611 /* forking epoll should also effectively unregister all fds from the backend */
538 epoll_fork (EV_A); 612 epoll_fork (EV_A);
613 /* epoll_fork already did this. hopefully */
614 /*fd_rearm_all (EV_A);*/
539 615
540 ev_io_stop (EV_A_ &linuxaio_epoll_w); 616 ev_io_stop (EV_A_ &linuxaio_epoll_w);
541 ev_io_set (EV_A_ &linuxaio_epoll_w, backend_fd, EV_READ); 617 ev_io_set (EV_A_ &linuxaio_epoll_w, backend_fd, EV_READ);
542 ev_io_start (EV_A_ &linuxaio_epoll_w); 618 ev_io_start (EV_A_ &linuxaio_epoll_w);
543
544 /* epoll_fork already did this. hopefully */
545 /*fd_rearm_all (EV_A);*/
546} 619}
547 620

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