ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/IO-AIO/AIO.xs
(Generate patch)

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC vs.
Revision 1.184 by root, Tue Jul 5 20:34:42 2011 UTC

1#define _REENTRANT 1 1#include "libeio/xthread.h"
2
2#include <errno.h> 3#include <errno.h>
3 4
4#include "EXTERN.h" 5#include "EXTERN.h"
5#include "perl.h" 6#include "perl.h"
6#include "XSUB.h" 7#include "XSUB.h"
7 8
8#include "autoconf/config.h" 9#include "schmorp.h"
9 10
11#include <stddef.h>
12#include <stdlib.h>
13#include <errno.h>
10#include <sys/types.h> 14#include <sys/types.h>
11#include <sys/stat.h> 15#include <sys/stat.h>
12 16#include <sys/statvfs.h>
13#include <unistd.h> 17#include <limits.h>
14#include <fcntl.h> 18#include <fcntl.h>
15#include <signal.h>
16#include <sched.h> 19#include <sched.h>
17 20
18#include <pthread.h> 21#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
22# include <sys/mman.h>
23#endif
19 24
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 25/* perl namespace pollution */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 26#undef VERSION
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23 27
24#if __ia64 28#ifdef _WIN32
25# define STACKSIZE 65536 29
30# define EIO_STRUCT_DIRENT Direntry_t
31# undef malloc
32# undef free
33
34// perl overrides all those nice win32 functions
35# undef open
36# undef read
37# undef write
38# undef send
39# undef recv
40# undef stat
41# undef fstat
42# define lstat stat
43# undef truncate
44# undef ftruncate
45# undef open
46# undef close
47# undef unlink
48# undef rmdir
49# undef rename
50# undef lseek
51
52# define chown(a,b,c) (errno = ENOSYS, -1)
53# define fchown(a,b,c) (errno = ENOSYS, -1)
54# define fchmod(a,b) (errno = ENOSYS, -1)
55# define symlink(a,b) (errno = ENOSYS, -1)
56# define readlink(a,b,c) (errno = ENOSYS, -1)
57# define mknod(a,b,c) (errno = ENOSYS, -1)
58# define truncate(a,b) (errno = ENOSYS, -1)
59# define ftruncate(fd,o) chsize ((fd), (o))
60# define fsync(fd) _commit (fd)
61# define opendir(fd) (errno = ENOSYS, 0)
62# define readdir(fd) (errno = ENOSYS, -1)
63# define closedir(fd) (errno = ENOSYS, -1)
64# define mkdir(a,b) mkdir (a)
65
26#else 66#else
27# define STACKSIZE 4096 67
68# include <sys/time.h>
69# include <sys/select.h>
70# include <unistd.h>
71# include <utime.h>
72# include <signal.h>
73# define EIO_STRUCT_DIRENT struct dirent
74
75#endif
76
77/* perl stupidly overrides readdir and maybe others */
78/* with thread-unsafe versions, imagine that :( */
79#undef readdir
80#undef opendir
81#undef closedir
82
83#define EIO_STRUCT_STAT Stat_t
84
85/* use NV for 32 bit perls as it allows larger offsets */
86#if IVSIZE >= 8
87# define VAL64 IV
88# define SvVAL64 SvIV
89# define newSVval64 newSViv
90#else
91# define VAL64 NV
92# define SvVAL64 SvNV
93# define newSVval64 newSVnv
94#endif
95
96/*****************************************************************************/
97
98#if __GNUC__ >= 3
99# define expect(expr,value) __builtin_expect ((expr),(value))
100#else
101# define expect(expr,value) (expr)
102#endif
103
104#define expect_false(expr) expect ((expr) != 0, 0)
105#define expect_true(expr) expect ((expr) != 0, 1)
106
107/*****************************************************************************/
108
109typedef SV SV8; /* byte-sv, used for argument-checking */
110typedef int aio_rfd; /* read file desriptor */
111typedef int aio_wfd; /* write file descriptor */
112
113static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
114
115#define EIO_REQ_MEMBERS \
116 SV *callback; \
117 SV *sv1, *sv2; \
118 STRLEN stroffset; \
119 SV *self;
120
121#define EIO_NO_WRAPPERS 1
122
123#include "libeio/config.h"
124#include "libeio/eio.h"
125
126/* Linux/others */
127#ifndef O_ASYNC
128# define O_ASYNC 0
129#endif
130#ifndef O_DIRECT
131# define O_DIRECT 0
132#endif
133#ifndef O_NOATIME
134# define O_NOATIME 0
135#endif
136
137/* POSIX */
138#ifndef O_CLOEXEC
139# define O_CLOEXEC 0
140#endif
141#ifndef O_NOFOLLOW
142# define O_NOFOLLOW 0
143#endif
144#ifndef O_NOCTTY
145# define O_NOCTTY 0
146#endif
147#ifndef O_NONBLOCK
148# define O_NONBLOCK 0
149#endif
150#ifndef O_EXEC
151# define O_EXEC 0
152#endif
153#ifndef O_SEARCH
154# define O_SEARCH 0
155#endif
156#ifndef O_DIRECTORY
157# define O_DIRECTORY 0
158#endif
159#ifndef O_DSYNC
160# define O_DSYNC 0
161#endif
162#ifndef O_RSYNC
163# define O_RSYNC 0
164#endif
165#ifndef O_SYNC
166# define O_SYNC 0
167#endif
168#ifndef O_TTY_INIT
169# define O_TTY_INIT 0
170#endif
171
172#ifndef POSIX_FADV_NORMAL
173# define POSIX_FADV_NORMAL 0
174#endif
175#ifndef POSIX_FADV_SEQUENTIAL
176# define POSIX_FADV_SEQUENTIAL 0
177#endif
178#ifndef POSIX_FADV_RANDOM
179# define POSIX_FADV_RANDOM 0
180#endif
181#ifndef POSIX_FADV_NOREUSE
182# define POSIX_FADV_NOREUSE 0
183#endif
184#ifndef POSIX_FADV_WILLNEED
185# define POSIX_FADV_WILLNEED 0
186#endif
187#ifndef POSIX_FADV_DONTNEED
188# define POSIX_FADV_DONTNEED 0
189#endif
190
191#if !HAVE_POSIX_FADVISE
192# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
193#endif
194
195#ifndef POSIX_MADV_NORMAL
196# define POSIX_MADV_NORMAL 0
197#endif
198#ifndef POSIX_MADV_SEQUENTIAL
199# define POSIX_MADV_SEQUENTIAL 0
200#endif
201#ifndef POSIX_MADV_RANDOM
202# define POSIX_MADV_RANDOM 0
203#endif
204#ifndef POSIX_MADV_WILLNEED
205# define POSIX_MADV_WILLNEED 0
206#endif
207#ifndef POSIX_MADV_DONTNEED
208# define POSIX_MADV_DONTNEED 0
209#endif
210
211#if !HAVE_POSIX_MADVISE
212# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
213#endif
214
215#ifndef PROT_NONE
216# define PROT_NONE 0
217#endif
218#ifndef PROT_READ
219# define PROT_READ 0
220#endif
221#ifndef PROT_WRITE
222# define PROT_READ 0
223#endif
224#ifndef PROT_EXEC
225# define PROT_EXEC 0
226#endif
227
228#ifndef ST_NODEV
229# define ST_NODEV 0
230#endif
231#ifndef ST_NOEXEC
232# define ST_NOEXEC 0
233#endif
234#ifndef ST_SYNCHRONOUS
235# define ST_SYNCHRONOUS 0
236#endif
237#ifndef ST_MANDLOCK
238# define ST_MANDLOCK 0
239#endif
240#ifndef ST_WRITE
241# define ST_WRITE 0
242#endif
243#ifndef ST_APPEND
244# define ST_APPEND 0
245#endif
246#ifndef ST_IMMUTABLE
247# define ST_IMMUTABLE 0
248#endif
249#ifndef ST_NOATIME
250# define ST_NOATIME 0
251#endif
252#ifndef ST_NODIRATIME
253# define ST_NODIRATIME 0
254#endif
255#ifndef ST_RELATIME
256# define ST_RELATIME 0
257#endif
258
259#ifndef S_IFIFO
260# define S_IFIFO 0
261#endif
262#ifndef S_IFCHR
263# define S_IFCHR 0
264#endif
265#ifndef S_IFBLK
266# define S_IFBLK 0
267#endif
268#ifndef S_IFLNK
269# define S_IFLNK 0
270#endif
271#ifndef S_IFREG
272# define S_IFREG 0
273#endif
274#ifndef S_IFDIR
275# define S_IFDIR 0
276#endif
277#ifndef S_IFWHT
278# define S_IFWHT 0
279#endif
280#ifndef S_IFSOCK
281# define S_IFSOCK 0
282#endif
283
284#ifndef MAP_ANONYMOUS
285# ifdef MAP_ANON
286# define MAP_ANONYMOUS MAP_ANON
287# else
288# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28#endif 289# endif
290#endif
291#ifndef MAP_HUGETLB
292# define MAP_HUGETLB 0
293#endif
294#ifndef MAP_LOCKED
295# define MAP_LOCKED 0
296#endif
297#ifndef MAP_NORESERVE
298# define MAP_NORESERVE 0
299#endif
300#ifndef MAP_POPULATE
301# define MAP_POPULATE 0
302#endif
303#ifndef MAP_NONBLOCK
304# define MAP_NONBLOCK 0
305#endif
306
307#ifndef makedev
308# define makedev(maj,min) (((maj) << 8) | (min))
309#endif
310#ifndef major
311# define major(dev) ((dev) >> 8)
312#endif
313#ifndef minor
314# define minor(dev) ((dev) & 0xff)
315#endif
316
317#ifndef PAGESIZE
318# define PAGESIZE sysconf (_SC_PAGESIZE)
319#endif
320
321static int req_invoke (eio_req *req);
322#define EIO_FINISH(req) req_invoke (req)
323static void req_destroy (eio_req *grp);
324#define EIO_DESTROY(req) req_destroy (req)
29 325
30enum { 326enum {
31 REQ_QUIT, 327 FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK,
37 REQ_SYMLINK,
38}; 328};
39 329
40typedef struct aio_cb { 330#include "libeio/eio.c"
41 struct aio_cb *volatile next;
42 331
43 int type;
44
45 int fd;
46 off_t offset;
47 size_t length;
48 ssize_t result;
49 mode_t mode; /* open */
50 int errorno;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb;
57
58typedef aio_cb *aio_req; 332typedef eio_req *aio_req;
333typedef eio_req *aio_req_ornot;
59 334
60static int started; 335static SV *on_next_submit;
61static volatile int nreqs; 336static int next_pri = EIO_PRI_DEFAULT;
62static int max_outstanding = 1<<30; 337static int max_outstanding;
63static int respipe [2];
64 338
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 339static s_epipe respipe;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 340
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 341static void req_destroy (aio_req req);
71static volatile aio_req ress, rese; /* queue start, queue end */ 342static void req_cancel (aio_req req);
72 343
73static void 344static void want_poll (void)
74poll_wait ()
75{ 345{
76 if (nreqs && !ress) 346 /* write a dummy byte to the pipe so fh becomes ready */
347 s_epipe_signal (&respipe);
348}
349
350static void done_poll (void)
351{
352 /* read any signals sent by the worker threads */
353 s_epipe_drain (&respipe);
354}
355
356/* must be called at most once */
357static SV *req_sv (aio_req req, HV *stash)
358{
359 if (!req->self)
77 { 360 {
78 fd_set rfd; 361 req->self = (SV *)newHV ();
79 FD_ZERO(&rfd); 362 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80 FD_SET(respipe [0], &rfd);
81
82 select (respipe [0] + 1, &rfd, 0, 0, 0);
83 } 363 }
84}
85 364
86static int 365 return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
87poll_cb () 366}
88{
89 dSP;
90 int count = 0;
91 aio_req req, prv;
92 367
93 pthread_mutex_lock (&reslock); 368static aio_req SvAIO_REQ (SV *sv)
369{
370 MAGIC *mg;
94 371
95 { 372 if (!SvROK (sv)
96 /* read any signals sent by the worker threads */ 373 || (SvSTASH (SvRV (sv)) != aio_grp_stash
97 char buf [32]; 374 && SvSTASH (SvRV (sv)) != aio_req_stash
98 while (read (respipe [0], buf, 32) == 32) 375 && !sv_derived_from (sv, "IO::AIO::REQ")))
99 ; 376 croak ("object of class IO::AIO::REQ expected");
100 }
101 377
102 req = ress; 378 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
103 ress = rese = 0;
104 379
105 pthread_mutex_unlock (&reslock); 380 return mg ? (aio_req)mg->mg_ptr : 0;
381}
106 382
107 while (req) 383static void aio_grp_feed (aio_req grp)
384{
385 if (grp->sv2 && SvOK (grp->sv2))
108 { 386 {
109 nreqs--; 387 dSP;
110 388
111 if (req->type == REQ_QUIT) 389 ENTER;
112 started--; 390 SAVETMPS;
113 else 391 PUSHMARK (SP);
392 XPUSHs (req_sv (grp, aio_grp_stash));
393 PUTBACK;
394 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
395 SPAGAIN;
396 FREETMPS;
397 LEAVE;
398 }
399}
400
401static void req_submit (eio_req *req)
402{
403 eio_submit (req);
404
405 if (expect_false (on_next_submit))
406 {
407 dSP;
408 SV *cb = sv_2mortal (on_next_submit);
409
410 on_next_submit = 0;
411
412 PUSHMARK (SP);
413 PUTBACK;
414 call_sv (cb, G_DISCARD | G_EVAL);
415 }
416}
417
418static int req_invoke (eio_req *req)
419{
420 if (req->flags & FLAG_SV2_RO_OFF)
421 SvREADONLY_off (req->sv2);
422
423 if (!EIO_CANCELLED (req) && req->callback)
424 {
425 dSP;
426 static SV *sv_result_cache; /* caches the result integer SV */
427 SV *sv_result;
428
429 ENTER;
430 SAVETMPS;
431 PUSHMARK (SP);
432 EXTEND (SP, 1);
433
434 /* do not recreate the result IV from scratch each time */
435 if (expect_true (sv_result_cache))
114 { 436 {
115 int errorno = errno; 437 sv_result = sv_result_cache; sv_result_cache = 0;
116 errno = req->errorno; 438 SvIV_set (sv_result, req->result);
117 439 SvIOK_only (sv_result);
118 if (req->type == REQ_READ)
119 SvCUR_set (req->data, req->dataoffset
120 + req->result > 0 ? req->result : 0);
121
122 if (req->data)
123 SvREFCNT_dec (req->data);
124
125 if (req->fh)
126 SvREFCNT_dec (req->fh);
127
128 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129 {
130 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131 PL_laststatval = req->result;
132 PL_statcache = *(req->statdata);
133
134 Safefree (req->statdata);
135 }
136
137 ENTER;
138 PUSHMARK (SP);
139 XPUSHs (sv_2mortal (newSViv (req->result)));
140
141 if (req->type == REQ_OPEN)
142 {
143 /* convert fd to fh */
144 SV *fh;
145
146 PUTBACK;
147 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148 SPAGAIN;
149
150 fh = SvREFCNT_inc (POPs);
151
152 PUSHMARK (SP);
153 XPUSHs (sv_2mortal (fh));
154 }
155
156 if (SvOK (req->callback))
157 {
158 PUTBACK;
159 call_sv (req->callback, G_VOID | G_EVAL);
160 SPAGAIN;
161 }
162
163 LEAVE;
164
165 if (req->callback)
166 SvREFCNT_dec (req->callback);
167
168 errno = errorno;
169 count++;
170 }
171
172 prv = req;
173 req = req->next;
174 Safefree (prv);
175
176 /* TODO: croak on errors? */
177 }
178
179 return count;
180}
181
182static void *aio_proc(void *arg);
183
184static void
185start_thread (void)
186{
187 sigset_t fullsigset, oldsigset;
188 pthread_t tid;
189 pthread_attr_t attr;
190
191 pthread_attr_init (&attr);
192 pthread_attr_setstacksize (&attr, STACKSIZE);
193 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
194
195 sigfillset (&fullsigset);
196 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197
198 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
199 started++;
200
201 sigprocmask (SIG_SETMASK, &oldsigset, 0);
202}
203
204static void
205send_req (aio_req req)
206{
207 nreqs++;
208
209 pthread_mutex_lock (&reqlock);
210
211 req->next = 0;
212
213 if (reqe)
214 {
215 reqe->next = req;
216 reqe = req;
217 }
218 else
219 reqe = reqs = req;
220
221 pthread_cond_signal (&reqwait);
222 pthread_mutex_unlock (&reqlock);
223
224 while (nreqs > max_outstanding)
225 {
226 poll_wait ();
227 poll_cb ();
228 }
229}
230
231static void
232end_thread (void)
233{
234 aio_req req;
235 New (0, req, 1, aio_cb);
236 req->type = REQ_QUIT;
237
238 send_req (req);
239}
240
241
242static void min_parallel (int nthreads)
243{
244 while (nthreads > started)
245 start_thread ();
246}
247
248static void max_parallel (int nthreads)
249{
250 int cur = started;
251 while (cur > nthreads)
252 {
253 end_thread ();
254 cur--;
255 }
256
257 while (started > nthreads)
258 {
259 poll_wait ();
260 poll_cb ();
261 }
262}
263
264static int fork_started;
265
266static void atfork_prepare (void)
267{
268 pthread_mutex_lock (&frklock);
269
270 fork_started = started;
271
272 for (;;) {
273 while (nreqs)
274 {
275 poll_wait ();
276 poll_cb ();
277 }
278
279 max_parallel (0);
280
281 pthread_mutex_lock (&reqlock);
282
283 if (!nreqs && !started)
284 break;
285
286 pthread_mutex_unlock (&reqlock);
287
288 min_parallel (fork_started);
289 }
290
291 pthread_mutex_lock (&reslock);
292
293 assert (!started);
294 assert (!nreqs);
295 assert (!reqs && !reqe);
296 assert (!ress && !rese);
297}
298
299static void atfork_parent (void)
300{
301 pthread_mutex_unlock (&reslock);
302 min_parallel (fork_started);
303 pthread_mutex_unlock (&reqlock);
304 pthread_mutex_unlock (&frklock);
305}
306
307static void atfork_child (void)
308{
309 reqs = reqe = 0;
310
311 atfork_parent ();
312}
313
314/*****************************************************************************/
315/* work around various missing functions */
316
317#if !HAVE_PREADWRITE
318# define pread aio_pread
319# define pwrite aio_pwrite
320
321/*
322 * make our pread/pwrite safe against themselves, but not against
323 * normal read/write by using a mutex. slows down execution a lot,
324 * but that's your problem, not mine.
325 */
326static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
327
328static ssize_t
329pread (int fd, void *buf, size_t count, off_t offset)
330{
331 ssize_t res;
332 off_t ooffset;
333
334 pthread_mutex_lock (&iolock);
335 ooffset = lseek (fd, 0, SEEK_CUR);
336 lseek (fd, offset, SEEK_SET);
337 res = read (fd, buf, count);
338 lseek (fd, ooffset, SEEK_SET);
339 pthread_mutex_unlock (&iolock);
340
341 return res;
342}
343
344static ssize_t
345pwrite (int fd, void *buf, size_t count, off_t offset)
346{
347 ssize_t res;
348 off_t ooffset;
349
350 pthread_mutex_lock (&iolock);
351 ooffset = lseek (fd, 0, SEEK_CUR);
352 lseek (fd, offset, SEEK_SET);
353 res = write (fd, buf, count);
354 lseek (fd, offset, SEEK_SET);
355 pthread_mutex_unlock (&iolock);
356
357 return res;
358}
359#endif
360
361#if !HAVE_FDATASYNC
362# define fdatasync fsync
363#endif
364
365#if !HAVE_READAHEAD
366# define readahead aio_readahead
367
368static char readahead_buf[4096];
369
370static ssize_t
371readahead (int fd, off_t offset, size_t count)
372{
373 while (count > 0)
374 {
375 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376
377 pread (fd, readahead_buf, len, offset);
378 offset += len;
379 count -= len;
380 }
381
382 errno = 0;
383}
384#endif
385
386/*****************************************************************************/
387
388static void *
389aio_proc (void *thr_arg)
390{
391 aio_req req;
392 int type;
393
394 do
395 {
396 pthread_mutex_lock (&reqlock);
397
398 for (;;)
399 {
400 req = reqs;
401
402 if (reqs)
403 {
404 reqs = reqs->next;
405 if (!reqs) reqe = 0;
406 }
407
408 if (req)
409 break;
410
411 pthread_cond_wait (&reqwait, &reqlock);
412 }
413
414 pthread_mutex_unlock (&reqlock);
415
416 errno = 0; /* strictly unnecessary */
417
418 type = req->type;
419
420 switch (type)
421 {
422 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
423 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424
425 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
426
427 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430
431 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432 case REQ_CLOSE: req->result = close (req->fd); break;
433 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
435 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436
437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438 case REQ_FSYNC: req->result = fsync (req->fd); break;
439
440 case REQ_QUIT:
441 break;
442
443 default:
444 req->result = ENOSYS;
445 break;
446 }
447
448 req->errorno = errno;
449
450 pthread_mutex_lock (&reslock);
451
452 req->next = 0;
453
454 if (rese)
455 {
456 rese->next = req;
457 rese = req;
458 } 440 }
459 else 441 else
460 { 442 {
461 rese = ress = req; 443 sv_result = newSViv (req->result);
462 444 SvREADONLY_on (sv_result);
463 /* write a dummy byte to the pipe so fh becomes ready */
464 write (respipe [1], &respipe, 1);
465 } 445 }
466 446
467 pthread_mutex_unlock (&reslock); 447 switch (req->type)
448 {
449 case EIO_READDIR:
450 {
451 SV *rv = &PL_sv_undef;
452
453 if (req->result >= 0)
454 {
455 int i;
456 char *names = (char *)req->ptr2;
457 eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
458 AV *av = newAV ();
459
460 av_extend (av, req->result - 1);
461
462 for (i = 0; i < req->result; ++i)
463 {
464 if (req->int1 & EIO_READDIR_DENTS)
465 {
466 SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
467
468 if (req->int1 & EIO_READDIR_CUSTOM2)
469 {
470 static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
471 AV *avent = newAV ();
472
473 av_extend (avent, 2);
474
475 if (!sv_type [ent->type])
476 {
477 sv_type [ent->type] = newSViv (ent->type);
478 SvREADONLY_on (sv_type [ent->type]);
479 }
480
481 av_store (avent, 0, namesv);
482 av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
483 av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
484
485 av_store (av, i, newRV_noinc ((SV *)avent));
486 }
487 else
488 av_store (av, i, namesv);
489
490 ++ent;
491 }
492 else
493 {
494 SV *name = newSVpv (names, 0);
495 av_store (av, i, name);
496 names += SvCUR (name) + 1;
497 }
498 }
499
500 rv = sv_2mortal (newRV_noinc ((SV *)av));
501 }
502
503 PUSHs (rv);
504
505 if (req->int1 & EIO_READDIR_CUSTOM1)
506 XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
507 }
508 break;
509
510 case EIO_OPEN:
511 {
512 /* convert fd to fh */
513 SV *fh = &PL_sv_undef;
514
515 if (req->result >= 0)
516 {
517 GV *gv = (GV *)sv_newmortal ();
518 int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
519 char sym [64];
520 int symlen;
521
522 symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
523 gv_init (gv, aio_stash, sym, symlen, 0);
524
525 symlen = snprintf (
526 sym,
527 sizeof (sym),
528 "%s&=%d",
529 flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
530 (int)req->result
531 );
532
533 if (do_open (gv, sym, symlen, 0, 0, 0, 0))
534 fh = (SV *)gv;
535 }
536
537 PUSHs (fh);
538 }
539 break;
540
541 case EIO_STATVFS:
542 case EIO_FSTATVFS:
543 {
544 SV *rv = &PL_sv_undef;
545
546 if (req->result >= 0)
547 {
548 EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
549 HV *hv = newHV ();
550
551 rv = sv_2mortal (newRV_noinc ((SV *)hv));
552
553 hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
554 hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
555 hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
556 hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
557 hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
558 hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
559 hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
560 hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
561 hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
562 hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
563 hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
564 }
565
566 PUSHs (rv);
567 }
568
569 break;
570
571 case EIO_GROUP:
572 req->int1 = 2; /* mark group as finished */
573
574 if (req->sv1)
575 {
576 int i;
577 AV *av = (AV *)req->sv1;
578
579 EXTEND (SP, AvFILL (av) + 1);
580 for (i = 0; i <= AvFILL (av); ++i)
581 PUSHs (*av_fetch (av, i, 0));
582 }
583 break;
584
585 case EIO_NOP:
586 case EIO_BUSY:
587 break;
588
589 case EIO_READLINK:
590 case EIO_REALPATH:
591 if (req->result > 0)
592 PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
593 break;
594
595 case EIO_STAT:
596 case EIO_LSTAT:
597 case EIO_FSTAT:
598 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
599 PL_laststatval = req->result;
600 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
601 PUSHs (sv_result);
602 break;
603
604 case EIO_READ:
605 {
606 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
607 *SvEND (req->sv2) = 0;
608 SvPOK_only (req->sv2);
609 SvSETMAGIC (req->sv2);
610 PUSHs (sv_result);
611 }
612 break;
613
614 case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
615 if (req->result > 0)
616 SvIV_set (sv_result, 0);
617 /* FALLTHROUGH */
618
619 default:
620 PUSHs (sv_result);
621 break;
622 }
623
624 errno = req->errorno;
625
626 PUTBACK;
627 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
628 SPAGAIN;
629
630 if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
631 SvREFCNT_dec (sv_result);
632 else
633 sv_result_cache = sv_result;
634
635 FREETMPS;
636 LEAVE;
637
638 PUTBACK;
468 } 639 }
469 while (type != REQ_QUIT); 640
641 return !!SvTRUE (ERRSV);
642}
643
644static void req_destroy (aio_req req)
645{
646 if (req->self)
647 {
648 sv_unmagic (req->self, PERL_MAGIC_ext);
649 SvREFCNT_dec (req->self);
650 }
651
652 SvREFCNT_dec (req->sv1);
653 SvREFCNT_dec (req->sv2);
654 SvREFCNT_dec (req->callback);
655
656 Safefree (req);
657}
658
659static void req_cancel_subs (aio_req grp)
660{
661 aio_req sub;
662
663 if (grp->type != EIO_GROUP)
664 return;
665
666 SvREFCNT_dec (grp->sv2);
667 grp->sv2 = 0;
668
669 eio_grp_cancel (grp);
670}
671
672static void create_respipe (void)
673{
674 if (s_epipe_renew (&respipe))
675 croak ("IO::AIO: unable to initialize result pipe");
676}
677
678static void poll_wait (void)
679{
680 while (eio_nreqs ())
681 {
682 int size;
683
684 X_LOCK (reslock);
685 size = res_queue.size;
686 X_UNLOCK (reslock);
687
688 if (size)
689 return;
690
691 etp_maybe_start_thread ();
692
693 s_epipe_wait (&respipe);
694 }
695}
696
697static int poll_cb (void)
698{
699 for (;;)
700 {
701 int res = eio_poll ();
702
703 if (res > 0)
704 croak (0);
705
706 if (!max_outstanding || max_outstanding > eio_nreqs ())
707 return res;
708
709 poll_wait ();
710 }
711}
712
713static void atfork_child (void)
714{
715 create_respipe ();
716}
717
718/*****************************************************************************/
719
720#if !_POSIX_MAPPED_FILES
721# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
722# define munmap(addr,length) (errno = ENOSYS, -1)
723#endif
724
725#if !_POSIX_MEMORY_PROTECTION
726# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
727# define PROT_NONE 0
728# define PROT_WRITE 0
729# define MAP_PRIVATE 0
730# define MAP_SHARED 0
731# define MAP_FIXED 0
732#endif
733
734#define MMAP_MAGIC PERL_MAGIC_ext
735
736static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
737{
738 int old_errno = errno;
739 munmap (mg->mg_ptr, (size_t)mg->mg_obj);
740 errno = old_errno;
741
742 mg->mg_obj = 0; /* just in case */
743
744 SvREADONLY_off (sv);
745
746 if (SvPVX (sv) != mg->mg_ptr)
747 croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
748
749 SvCUR_set (sv, 0);
750 SvPVX (sv) = 0;
751 SvOK_off (sv);
470 752
471 return 0; 753 return 0;
472} 754}
473 755
756static MGVTBL mmap_vtbl = {
757 0, 0, 0, 0, mmap_free
758};
759
760/*****************************************************************************/
761
762static SV * get_cb (SV *cb_sv)
763{
764 SvGETMAGIC (cb_sv);
765 return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
766}
767
474#define dREQ \ 768#define dREQ \
769 SV *cb_cv; \
475 aio_req req; \ 770 aio_req req; \
771 int req_pri = next_pri; \
772 next_pri = EIO_PRI_DEFAULT; \
476 \ 773 \
477 if (SvOK (callback) && !SvROK (callback)) \ 774 cb_cv = get_cb (callback); \
478 croak ("clalback must be undef or of reference type"); \
479 \ 775 \
480 Newz (0, req, 1, aio_cb); \ 776 Newz (0, req, 1, eio_req); \
481 if (!req) \ 777 if (!req) \
482 croak ("out of memory during aio_req allocation"); \ 778 croak ("out of memory during eio_req allocation"); \
483 \ 779 \
484 req->callback = SvREFCNT_inc (callback); 780 req->callback = SvREFCNT_inc (cb_cv); \
485 781 req->pri = req_pri
782
783#define REQ_SEND \
784 PUTBACK; \
785 req_submit (req); \
786 SPAGAIN; \
787 \
788 if (GIMME_V != G_VOID) \
789 XPUSHs (req_sv (req, aio_req_stash));
790
486MODULE = IO::AIO PACKAGE = IO::AIO 791MODULE = IO::AIO PACKAGE = IO::AIO
487 792
488PROTOTYPES: ENABLE 793PROTOTYPES: ENABLE
489 794
490BOOT: 795BOOT:
491{ 796{
492 if (pipe (respipe)) 797 static const struct {
493 croak ("unable to initialize result pipe"); 798 const char *name;
799 IV iv;
800 } *civ, const_iv[] = {
801# define const_niv(name, value) { # name, (IV) value },
802# define const_iv(name) { # name, (IV) name },
803# define const_eio(name) { # name, (IV) EIO_ ## name },
804 const_iv (EXDEV)
805 const_iv (ENOSYS)
806 const_iv (O_RDONLY)
807 const_iv (O_WRONLY)
808 const_iv (O_RDWR)
809 const_iv (O_CREAT)
810 const_iv (O_TRUNC)
811 const_iv (O_EXCL)
812 const_iv (O_APPEND)
494 813
495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 814 const_iv (O_ASYNC)
496 croak ("cannot set result pipe to nonblocking mode"); 815 const_iv (O_DIRECT)
816 const_iv (O_NOATIME)
497 817
498 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 818 const_iv (O_CLOEXEC)
499 croak ("cannot set result pipe to nonblocking mode"); 819 const_iv (O_NOCTTY)
820 const_iv (O_NOFOLLOW)
821 const_iv (O_NONBLOCK)
822 const_iv (O_EXEC)
823 const_iv (O_SEARCH)
824 const_iv (O_DIRECTORY)
825 const_iv (O_DSYNC)
826 const_iv (O_RSYNC)
827 const_iv (O_SYNC)
828 const_iv (O_TTY_INIT)
500 829
501 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 830 const_iv (S_IFIFO)
502} 831 const_iv (S_IFCHR)
832 const_iv (S_IFBLK)
833 const_iv (S_IFLNK)
834 const_iv (S_IFREG)
835 const_iv (S_IFDIR)
836 const_iv (S_IFWHT)
837 const_iv (S_IFSOCK)
838 const_iv (S_IFMT)
503 839
840 const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
841 const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
842 const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
843 const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
844 const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
845 const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
846
847 const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
848 const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
849 const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
850 const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
851 const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
852
853 const_iv (ST_RDONLY)
854 const_iv (ST_NOSUID)
855 const_iv (ST_NODEV)
856 const_iv (ST_NOEXEC)
857 const_iv (ST_SYNCHRONOUS)
858 const_iv (ST_MANDLOCK)
859 const_iv (ST_WRITE)
860 const_iv (ST_APPEND)
861 const_iv (ST_IMMUTABLE)
862 const_iv (ST_NOATIME)
863 const_iv (ST_NODIRATIME)
864 const_iv (ST_RELATIME)
865
866 const_iv (PROT_NONE)
867 const_iv (PROT_EXEC)
868 const_iv (PROT_READ)
869 const_iv (PROT_WRITE)
870
871 /*const_iv (MAP_FIXED)*/
872 const_iv (MAP_PRIVATE)
873 const_iv (MAP_SHARED)
874 const_iv (MAP_ANONYMOUS)
875
876 /* linuxish */
877 const_iv (MAP_HUGETLB)
878 const_iv (MAP_LOCKED)
879 const_iv (MAP_NORESERVE)
880 const_iv (MAP_POPULATE)
881 const_iv (MAP_NONBLOCK)
882
883 const_eio (MCL_FUTURE)
884 const_eio (MCL_CURRENT)
885
886 const_eio (MS_ASYNC)
887 const_eio (MS_INVALIDATE)
888 const_eio (MS_SYNC)
889
890 const_eio (MT_MODIFY)
891
892 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
893 const_eio (SYNC_FILE_RANGE_WRITE)
894 const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
895
896 const_eio (READDIR_DENTS)
897 const_eio (READDIR_DIRS_FIRST)
898 const_eio (READDIR_STAT_ORDER)
899 const_eio (READDIR_FOUND_UNKNOWN)
900
901 const_eio (DT_UNKNOWN)
902 const_eio (DT_FIFO)
903 const_eio (DT_CHR)
904 const_eio (DT_DIR)
905 const_eio (DT_BLK)
906 const_eio (DT_REG)
907 const_eio (DT_LNK)
908 const_eio (DT_SOCK)
909 const_eio (DT_WHT)
910 };
911
912 aio_stash = gv_stashpv ("IO::AIO" , 1);
913 aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
914 aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
915
916 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
917 newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
918
919 newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
920
921 create_respipe ();
922
923 if (eio_init (want_poll, done_poll) < 0)
924 croak ("IO::AIO: unable to initialise eio library");
925
926 /* atfork child called in fifo order, so before eio's handler */
927 X_THREAD_ATFORK (0, 0, atfork_child);
928}
929
504void 930void
505min_parallel(nthreads) 931max_poll_reqs (unsigned int nreqs)
506 int nthreads
507 PROTOTYPE: $ 932 PROTOTYPE: $
933 CODE:
934 eio_set_max_poll_reqs (nreqs);
508 935
509void 936void
510max_parallel(nthreads) 937max_poll_time (double nseconds)
511 int nthreads
512 PROTOTYPE: $ 938 PROTOTYPE: $
513
514int
515max_outstanding(nreqs)
516 int nreqs
517 PROTOTYPE: $
518 CODE: 939 CODE:
519 RETVAL = max_outstanding; 940 eio_set_max_poll_time (nseconds);
941
942void
943min_parallel (unsigned int nthreads)
944 PROTOTYPE: $
945 CODE:
946 eio_set_min_parallel (nthreads);
947
948void
949max_parallel (unsigned int nthreads)
950 PROTOTYPE: $
951 CODE:
952 eio_set_max_parallel (nthreads);
953
954void
955max_idle (unsigned int nthreads)
956 PROTOTYPE: $
957 CODE:
958 eio_set_max_idle (nthreads);
959
960void
961idle_timeout (unsigned int seconds)
962 PROTOTYPE: $
963 CODE:
964 eio_set_idle_timeout (seconds);
965
966void
967max_outstanding (unsigned int maxreqs)
968 PROTOTYPE: $
969 CODE:
520 max_outstanding = nreqs; 970 max_outstanding = maxreqs;
521 971
522void 972void
523aio_open(pathname,flags,mode,callback=&PL_sv_undef) 973aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
524 SV * pathname
525 int flags
526 int mode
527 SV * callback
528 PROTOTYPE: $$$;$
529 CODE: 974 PPCODE:
530{ 975{
531 dREQ; 976 dREQ;
532 977
533 req->type = REQ_OPEN; 978 req->type = EIO_OPEN;
534 req->data = newSVsv (pathname); 979 req->sv1 = newSVsv (pathname);
535 req->dataptr = SvPVbyte_nolen (req->data); 980 req->ptr1 = SvPVbyte_nolen (req->sv1);
536 req->fd = flags; 981 req->int1 = flags;
537 req->mode = mode; 982 req->int2 = mode;
538 983
539 send_req (req); 984 REQ_SEND;
540} 985}
541 986
542void 987void
543aio_close(fh,callback=&PL_sv_undef) 988aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
544 SV * fh
545 SV * callback
546 PROTOTYPE: $;$
547 ALIAS: 989 ALIAS:
548 aio_close = REQ_CLOSE
549 aio_fsync = REQ_FSYNC 990 aio_fsync = EIO_FSYNC
550 aio_fdatasync = REQ_FDATASYNC 991 aio_fdatasync = EIO_FDATASYNC
551 CODE: 992 PPCODE:
552{ 993{
994 int fd = s_fileno_croak (fh, 0);
553 dREQ; 995 dREQ;
554 996
555 req->type = ix; 997 req->type = ix;
556 req->fh = newSVsv (fh); 998 req->sv1 = newSVsv (fh);
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 999 req->int1 = fd;
558 1000
559 send_req (req); 1001 REQ_SEND (req);
560} 1002}
561 1003
562void 1004void
1005aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
1006 PPCODE:
1007{
1008 int fd = s_fileno_croak (fh, 0);
1009 dREQ;
1010
1011 req->type = EIO_SYNC_FILE_RANGE;
1012 req->sv1 = newSVsv (fh);
1013 req->int1 = fd;
1014 req->offs = offset;
1015 req->size = nbytes;
1016 req->int2 = flags;
1017
1018 REQ_SEND (req);
1019}
1020
1021void
1022aio_close (SV *fh, SV *callback=&PL_sv_undef)
1023 PPCODE:
1024{
1025 static int close_pipe = -1; /* dummy fd to close fds via dup2 */
1026 int fd = s_fileno_croak (fh, 0);
1027 dREQ;
1028
1029 if (close_pipe < 0)
1030 {
1031 int pipefd [2];
1032
1033 if (pipe (pipefd) < 0
1034 || close (pipefd [1]) < 0
1035 || fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
1036 abort (); /*D*/
1037
1038 close_pipe = pipefd [0];
1039 }
1040
1041 req->type = EIO_DUP2;
1042 req->int1 = close_pipe;
1043 req->sv2 = newSVsv (fh);
1044 req->int2 = fd;
1045
1046 REQ_SEND (req);
1047}
1048
1049void
563aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1050aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
564 SV * fh
565 UV offset
566 IV length
567 SV * data
568 IV dataoffset
569 SV * callback
570 ALIAS: 1051 ALIAS:
571 aio_read = REQ_READ 1052 aio_read = EIO_READ
572 aio_write = REQ_WRITE 1053 aio_write = EIO_WRITE
573 PROTOTYPE: $$$$$;$
574 CODE: 1054 PPCODE:
575{ 1055{
576 aio_req req;
577 STRLEN svlen; 1056 STRLEN svlen;
1057 int fd = s_fileno_croak (fh, ix == EIO_WRITE);
578 char *svptr = SvPVbyte (data, svlen); 1058 char *svptr = SvPVbyte (data, svlen);
579 1059 UV len = SvUV (length);
580 SvUPGRADE (data, SVt_PV);
581 SvPOK_on (data);
582 1060
583 if (dataoffset < 0) 1061 if (dataoffset < 0)
584 dataoffset += svlen; 1062 dataoffset += svlen;
585 1063
586 if (dataoffset < 0 || dataoffset > svlen) 1064 if (dataoffset < 0 || dataoffset > svlen)
587 croak ("data offset outside of string"); 1065 croak ("dataoffset outside of data scalar");
588 1066
589 if (ix == REQ_WRITE) 1067 if (ix == EIO_WRITE)
590 { 1068 {
591 /* write: check length and adjust. */ 1069 /* write: check length and adjust. */
592 if (length < 0 || length + dataoffset > svlen) 1070 if (!SvOK (length) || len + dataoffset > svlen)
593 length = svlen - dataoffset; 1071 len = svlen - dataoffset;
594 } 1072 }
595 else 1073 else
596 { 1074 {
597 /* read: grow scalar as necessary */ 1075 /* read: check type and grow scalar as necessary */
1076 SvUPGRADE (data, SVt_PV);
598 svptr = SvGROW (data, length + dataoffset); 1077 svptr = SvGROW (data, len + dataoffset + 1);
599 } 1078 }
600
601 if (length < 0)
602 croak ("length must not be negative");
603 1079
604 { 1080 {
605 dREQ; 1081 dREQ;
606 1082
607 req->type = ix; 1083 req->type = ix;
608 req->fh = newSVsv (fh); 1084 req->sv1 = newSVsv (fh);
609 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 1085 req->int1 = fd;
610 : IoOFP (sv_2io (fh))); 1086 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
611 req->offset = offset; 1087 req->size = len;
612 req->length = length;
613 req->data = SvREFCNT_inc (data); 1088 req->sv2 = SvREFCNT_inc (data);
614 req->dataptr = (char *)svptr + dataoffset; 1089 req->ptr2 = (char *)svptr + dataoffset;
615 req->callback = SvREFCNT_inc (callback); 1090 req->stroffset = dataoffset;
616 1091
617 send_req (req); 1092 if (!SvREADONLY (data))
1093 {
1094 SvREADONLY_on (data);
1095 req->flags |= FLAG_SV2_RO_OFF;
1096 }
1097
1098 REQ_SEND;
618 } 1099 }
619} 1100}
620 1101
621void 1102void
622aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1103aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
623 SV * fh 1104 ALIAS:
624 UV offset 1105 aio_readlink = EIO_READLINK
625 IV length 1106 aio_realpath = EIO_REALPATH
626 SV * callback
627 PROTOTYPE: $$$;$
628 CODE: 1107 PPCODE:
629{ 1108{
1109 SV *data;
1110 dREQ;
1111
1112 req->type = ix;
1113 req->sv1 = newSVsv (path);
1114 req->ptr1 = SvPVbyte_nolen (req->sv1);
1115
1116 REQ_SEND;
1117}
1118
1119void
1120aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1121 PPCODE:
1122{
1123 int ifd = s_fileno_croak (in_fh , 0);
1124 int ofd = s_fileno_croak (out_fh, 1);
630 dREQ; 1125 dREQ;
631 1126
1127 req->type = EIO_SENDFILE;
1128 req->sv1 = newSVsv (out_fh);
1129 req->int1 = ofd;
1130 req->sv2 = newSVsv (in_fh);
1131 req->int2 = ifd;
1132 req->offs = in_offset;
1133 req->size = length;
1134
1135 REQ_SEND;
1136}
1137
1138void
1139aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1140 PPCODE:
1141{
1142 int fd = s_fileno_croak (fh, 0);
1143 dREQ;
1144
632 req->type = REQ_READAHEAD; 1145 req->type = EIO_READAHEAD;
633 req->fh = newSVsv (fh); 1146 req->sv1 = newSVsv (fh);
634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1147 req->int1 = fd;
635 req->offset = offset; 1148 req->offs = offset;
636 req->length = length; 1149 req->size = length;
637 1150
638 send_req (req); 1151 REQ_SEND;
639} 1152}
640 1153
641void 1154void
642aio_stat(fh_or_path,callback=&PL_sv_undef) 1155aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
643 SV * fh_or_path
644 SV * callback
645 ALIAS: 1156 ALIAS:
646 aio_stat = REQ_STAT 1157 aio_stat = EIO_STAT
647 aio_lstat = REQ_LSTAT 1158 aio_lstat = EIO_LSTAT
1159 aio_statvfs = EIO_STATVFS
648 CODE: 1160 PPCODE:
649{ 1161{
650 dREQ; 1162 dREQ;
651 1163
652 New (0, req->statdata, 1, Stat_t); 1164 req->sv1 = newSVsv (fh_or_path);
653 if (!req->statdata)
654 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
655 1165
656 if (SvPOK (fh_or_path)) 1166 if (SvPOK (req->sv1))
657 { 1167 {
658 req->type = ix; 1168 req->type = ix;
659 req->data = newSVsv (fh_or_path);
660 req->dataptr = SvPVbyte_nolen (req->data); 1169 req->ptr1 = SvPVbyte_nolen (req->sv1);
661 } 1170 }
662 else 1171 else
663 { 1172 {
664 req->type = REQ_FSTAT; 1173 req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
665 req->fh = newSVsv (fh_or_path);
666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1174 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667 } 1175 }
668 1176
669 send_req (req); 1177 REQ_SEND;
670} 1178}
671 1179
1180UV
1181major (UV dev)
1182 ALIAS:
1183 minor = 1
1184 CODE:
1185 RETVAL = ix ? major (dev) : minor (dev);
1186 OUTPUT:
1187 RETVAL
1188
1189UV
1190makedev (UV maj, UV min)
1191 CODE:
1192 RETVAL = makedev (maj, min);
1193 OUTPUT:
1194 RETVAL
1195
672void 1196void
1197aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1198 PPCODE:
1199{
1200 dREQ;
1201
1202 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1203 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1204 req->sv1 = newSVsv (fh_or_path);
1205
1206 if (SvPOK (req->sv1))
1207 {
1208 req->type = EIO_UTIME;
1209 req->ptr1 = SvPVbyte_nolen (req->sv1);
1210 }
1211 else
1212 {
1213 req->type = EIO_FUTIME;
1214 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1215 }
1216
1217 REQ_SEND;
1218}
1219
1220void
1221aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1222 PPCODE:
1223{
1224 dREQ;
1225
1226 req->sv1 = newSVsv (fh_or_path);
1227 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1228
1229 if (SvPOK (req->sv1))
1230 {
1231 req->type = EIO_TRUNCATE;
1232 req->ptr1 = SvPVbyte_nolen (req->sv1);
1233 }
1234 else
1235 {
1236 req->type = EIO_FTRUNCATE;
1237 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1238 }
1239
1240 REQ_SEND;
1241}
1242
1243void
1244aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1245 ALIAS:
1246 aio_chmod = EIO_CHMOD
1247 aio_mkdir = EIO_MKDIR
1248 PPCODE:
1249{
1250 dREQ;
1251
1252 req->int2 = mode;
1253 req->sv1 = newSVsv (fh_or_path);
1254
1255 if (SvPOK (req->sv1))
1256 {
1257 req->type = ix;
1258 req->ptr1 = SvPVbyte_nolen (req->sv1);
1259 }
1260 else
1261 {
1262 req->type = EIO_FCHMOD;
1263 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1264 }
1265
1266 REQ_SEND;
1267}
1268
1269void
1270aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1271 PPCODE:
1272{
1273 dREQ;
1274
1275 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1276 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1277 req->sv1 = newSVsv (fh_or_path);
1278
1279 if (SvPOK (req->sv1))
1280 {
1281 req->type = EIO_CHOWN;
1282 req->ptr1 = SvPVbyte_nolen (req->sv1);
1283 }
1284 else
1285 {
1286 req->type = EIO_FCHOWN;
1287 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1288 }
1289
1290 REQ_SEND;
1291}
1292
1293void
1294aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
1295 PPCODE:
1296{
1297 dREQ;
1298
1299 req->type = EIO_READDIR;
1300 req->sv1 = newSVsv (pathname);
1301 req->ptr1 = SvPVbyte_nolen (req->sv1);
1302 req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
1303
1304 if (flags & EIO_READDIR_DENTS)
1305 req->int1 |= EIO_READDIR_CUSTOM2;
1306
1307 REQ_SEND;
1308}
1309
1310void
673aio_unlink(pathname,callback=&PL_sv_undef) 1311aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
674 SV * pathname
675 SV * callback
676 ALIAS: 1312 ALIAS:
677 aio_unlink = REQ_UNLINK 1313 aio_unlink = EIO_UNLINK
678 aio_rmdir = REQ_RMDIR 1314 aio_rmdir = EIO_RMDIR
1315 aio_readdir = EIO_READDIR
679 CODE: 1316 PPCODE:
680{ 1317{
681 dREQ; 1318 dREQ;
682 1319
683 req->type = ix; 1320 req->type = ix;
684 req->data = newSVsv (pathname); 1321 req->sv1 = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data); 1322 req->ptr1 = SvPVbyte_nolen (req->sv1);
686
687 send_req (req);
688}
689 1323
1324 REQ_SEND;
1325}
1326
690void 1327void
691aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1328aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
692 SV * oldpath 1329 ALIAS:
693 SV * newpath 1330 aio_link = EIO_LINK
694 SV * callback 1331 aio_symlink = EIO_SYMLINK
1332 aio_rename = EIO_RENAME
695 CODE: 1333 PPCODE:
696{ 1334{
697 dREQ; 1335 dREQ;
698 1336
699 req->type = REQ_SYMLINK; 1337 req->type = ix;
700 req->fh = newSVsv (oldpath); 1338 req->sv1 = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh); 1339 req->ptr1 = SvPVbyte_nolen (req->sv1);
702 req->data = newSVsv (newpath); 1340 req->sv2 = newSVsv (newpath);
703 req->dataptr = SvPVbyte_nolen (req->data); 1341 req->ptr2 = SvPVbyte_nolen (req->sv2);
704 1342
705 send_req (req); 1343 REQ_SEND;
706} 1344}
707 1345
708void 1346void
1347aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1348 PPCODE:
1349{
1350 dREQ;
1351
1352 req->type = EIO_MKNOD;
1353 req->sv1 = newSVsv (pathname);
1354 req->ptr1 = SvPVbyte_nolen (req->sv1);
1355 req->int2 = (mode_t)mode;
1356 req->offs = dev;
1357
1358 REQ_SEND;
1359}
1360
1361void
1362aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1363 ALIAS:
1364 aio_mtouch = EIO_MTOUCH
1365 aio_msync = EIO_MSYNC
1366 PPCODE:
1367{
1368 STRLEN svlen;
1369 char *svptr = SvPVbyte (data, svlen);
1370 UV len = SvUV (length);
1371
1372 if (offset < 0)
1373 offset += svlen;
1374
1375 if (offset < 0 || offset > svlen)
1376 croak ("offset outside of scalar");
1377
1378 if (!SvOK (length) || len + offset > svlen)
1379 len = svlen - offset;
1380
1381 {
1382 dREQ;
1383
1384 req->type = ix;
1385 req->sv2 = SvREFCNT_inc (data);
1386 req->ptr2 = (char *)svptr + offset;
1387 req->size = len;
1388 req->int1 = flags;
1389
1390 REQ_SEND;
1391 }
1392}
1393
1394void
1395aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
1396 PPCODE:
1397{
1398 STRLEN svlen;
1399 char *svptr = SvPVbyte (data, svlen);
1400 UV len = SvUV (length);
1401
1402 if (offset < 0)
1403 offset += svlen;
1404
1405 if (offset < 0 || offset > svlen)
1406 croak ("offset outside of scalar");
1407
1408 if (!SvOK (length) || len + offset > svlen)
1409 len = svlen - offset;
1410
1411 {
1412 dREQ;
1413
1414 req->type = EIO_MLOCK;
1415 req->sv2 = SvREFCNT_inc (data);
1416 req->ptr2 = (char *)svptr + offset;
1417 req->size = len;
1418
1419 REQ_SEND;
1420 }
1421}
1422
1423void
1424aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
1425 PPCODE:
1426{
1427 dREQ;
1428
1429 req->type = EIO_MLOCKALL;
1430 req->int1 = flags;
1431
1432 REQ_SEND;
1433}
1434
1435void
1436aio_busy (double delay, SV *callback=&PL_sv_undef)
1437 PPCODE:
1438{
1439 dREQ;
1440
1441 req->type = EIO_BUSY;
1442 req->nv1 = delay < 0. ? 0. : delay;
1443
1444 REQ_SEND;
1445}
1446
1447void
1448aio_group (SV *callback=&PL_sv_undef)
1449 PPCODE:
1450{
1451 dREQ;
1452
1453 req->type = EIO_GROUP;
1454
1455 req_submit (req);
1456 XPUSHs (req_sv (req, aio_grp_stash));
1457}
1458
1459void
1460aio_nop (SV *callback=&PL_sv_undef)
1461 ALIAS:
1462 aio_nop = EIO_NOP
1463 aio_sync = EIO_SYNC
1464 PPCODE:
1465{
1466 dREQ;
1467
1468 req->type = ix;
1469
1470 REQ_SEND;
1471}
1472
1473int
1474aioreq_pri (int pri = 0)
1475 CODE:
1476 RETVAL = next_pri;
1477 if (items > 0)
1478 {
1479 if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1480 if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1481 next_pri = pri;
1482 }
1483 OUTPUT:
1484 RETVAL
1485
1486void
1487aioreq_nice (int nice = 0)
1488 CODE:
1489 nice = next_pri - nice;
1490 if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1491 if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1492 next_pri = nice;
1493
1494void
709flush() 1495flush ()
710 PROTOTYPE:
711 CODE: 1496 CODE:
712 while (nreqs) 1497 while (eio_nreqs ())
713 { 1498 {
714 poll_wait (); 1499 poll_wait ();
715 poll_cb (); 1500 poll_cb ();
716 } 1501 }
717 1502
718void
719poll()
720 PROTOTYPE:
721 CODE:
722 if (nreqs)
723 {
724 poll_wait ();
725 poll_cb ();
726 }
727
728int 1503int
729poll_fileno() 1504poll ()
730 PROTOTYPE:
731 CODE: 1505 CODE:
732 RETVAL = respipe [0]; 1506 poll_wait ();
733 OUTPUT:
734 RETVAL
735
736int
737poll_cb(...)
738 PROTOTYPE:
739 CODE:
740 RETVAL = poll_cb (); 1507 RETVAL = poll_cb ();
741 OUTPUT: 1508 OUTPUT:
742 RETVAL 1509 RETVAL
743 1510
744void
745poll_wait()
746 PROTOTYPE:
747 CODE:
748 if (nreqs)
749 poll_wait ();
750
751int 1511int
752nreqs() 1512poll_fileno ()
753 PROTOTYPE:
754 CODE: 1513 CODE:
755 RETVAL = nreqs; 1514 RETVAL = s_epipe_fd (&respipe);
756 OUTPUT: 1515 OUTPUT:
757 RETVAL 1516 RETVAL
758 1517
1518int
1519poll_cb (...)
1520 PROTOTYPE:
1521 CODE:
1522 RETVAL = poll_cb ();
1523 OUTPUT:
1524 RETVAL
1525
1526void
1527poll_wait ()
1528 CODE:
1529 poll_wait ();
1530
1531int
1532nreqs ()
1533 CODE:
1534 RETVAL = eio_nreqs ();
1535 OUTPUT:
1536 RETVAL
1537
1538int
1539nready ()
1540 CODE:
1541 RETVAL = eio_nready ();
1542 OUTPUT:
1543 RETVAL
1544
1545int
1546npending ()
1547 CODE:
1548 RETVAL = eio_npending ();
1549 OUTPUT:
1550 RETVAL
1551
1552int
1553nthreads ()
1554 CODE:
1555 RETVAL = eio_nthreads ();
1556 OUTPUT:
1557 RETVAL
1558
1559int
1560fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1561 CODE:
1562 RETVAL = posix_fadvise (fh, offset, length, advice);
1563 OUTPUT:
1564 RETVAL
1565
1566ssize_t
1567sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
1568 CODE:
1569 RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
1570 OUTPUT:
1571 RETVAL
1572
1573void
1574mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
1575 PPCODE:
1576 sv_unmagic (scalar, MMAP_MAGIC);
1577{
1578 int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
1579 void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
1580 if (addr == (void *)-1)
1581 XSRETURN_NO;
1582
1583 sv_force_normal (scalar);
1584
1585 /* we store the length in mg_obj, as namlen is I32 :/ */
1586 sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
1587 ->mg_obj = (SV *)length;
1588
1589 SvUPGRADE (scalar, SVt_PV); /* nop... */
1590
1591 if (!(prot & PROT_WRITE))
1592 SvREADONLY_on (scalar);
1593
1594 if (SvLEN (scalar))
1595 Safefree (SvPVX (scalar));
1596
1597 SvPVX (scalar) = (char *)addr;
1598 SvCUR_set (scalar, length);
1599 SvLEN_set (scalar, 0);
1600 SvPOK_only (scalar);
1601
1602 XSRETURN_YES;
1603}
1604
1605void
1606munmap (SV *scalar)
1607 CODE:
1608 sv_unmagic (scalar, MMAP_MAGIC);
1609
1610int
1611madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
1612 ALIAS:
1613 mprotect = 1
1614 CODE:
1615{
1616 STRLEN svlen;
1617 void *addr = SvPVbyte (scalar, svlen);
1618 size_t len = SvUV (length);
1619
1620 if (offset < 0)
1621 offset += svlen;
1622
1623 if (offset < 0 || offset > svlen)
1624 croak ("offset outside of scalar");
1625
1626 if (!SvOK (length) || len + offset > svlen)
1627 len = svlen - offset;
1628
1629 addr = (void *)(((intptr_t)addr) + offset);
1630 eio_page_align (&addr, &len);
1631
1632 switch (ix)
1633 {
1634 case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
1635 case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
1636 }
1637}
1638 OUTPUT:
1639 RETVAL
1640
1641int
1642munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
1643 CODE:
1644{
1645 STRLEN svlen;
1646 void *addr = SvPVbyte (scalar, svlen);
1647 size_t len = SvUV (length);
1648
1649 if (offset < 0)
1650 offset += svlen;
1651
1652 if (offset < 0 || offset > svlen)
1653 croak ("offset outside of scalar");
1654
1655 if (!SvOK (length) || len + offset > svlen)
1656 len = svlen - offset;
1657
1658 addr = (void *)(((intptr_t)addr) + offset);
1659 eio_page_align (&addr, &len);
1660#if _POSIX_MEMLOCK_RANGE
1661 RETVAL = munlock (addr, len);
1662#else
1663 RETVAL = ((errno = ENOSYS), -1);
1664#endif
1665}
1666 OUTPUT:
1667 RETVAL
1668
1669int
1670munlockall ()
1671 CODE:
1672#if _POSIX_MEMLOCK
1673 munlockall ();
1674#else
1675 RETVAL = -1;
1676 errno = ENOSYS;
1677#endif
1678 OUTPUT:
1679 RETVAL
1680
1681void _on_next_submit (SV *cb)
1682 CODE:
1683 SvREFCNT_dec (on_next_submit);
1684 on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1685
1686PROTOTYPES: DISABLE
1687
1688MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1689
1690void
1691cancel (aio_req_ornot req)
1692 CODE:
1693 eio_cancel (req);
1694
1695void
1696cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1697 PPCODE:
1698{
1699 if (GIMME_V != G_VOID)
1700 XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
1701
1702 if (items > 1)
1703 {
1704 SV *cb_cv =get_cb (callback);
1705
1706 SvREFCNT_dec (req->callback);
1707 req->callback = SvREFCNT_inc (cb_cv);
1708 }
1709}
1710
1711MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1712
1713void
1714add (aio_req grp, ...)
1715 PPCODE:
1716{
1717 int i;
1718
1719 if (grp->int1 == 2)
1720 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1721
1722 for (i = 1; i < items; ++i )
1723 {
1724 aio_req req;
1725
1726 if (GIMME_V != G_VOID)
1727 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1728
1729 req = SvAIO_REQ (ST (i));
1730
1731 if (req)
1732 eio_grp_add (grp, req);
1733 }
1734}
1735
1736void
1737cancel_subs (aio_req_ornot req)
1738 CODE:
1739 req_cancel_subs (req);
1740
1741void
1742result (aio_req grp, ...)
1743 CODE:
1744{
1745 int i;
1746 AV *av;
1747
1748 grp->errorno = errno;
1749
1750 av = newAV ();
1751 av_extend (av, items - 1);
1752
1753 for (i = 1; i < items; ++i )
1754 av_push (av, newSVsv (ST (i)));
1755
1756 SvREFCNT_dec (grp->sv1);
1757 grp->sv1 = (SV *)av;
1758}
1759
1760void
1761errno (aio_req grp, int errorno = errno)
1762 CODE:
1763 grp->errorno = errorno;
1764
1765void
1766limit (aio_req grp, int limit)
1767 CODE:
1768 eio_grp_limit (grp, limit);
1769
1770void
1771feed (aio_req grp, SV *callback=&PL_sv_undef)
1772 CODE:
1773{
1774 SvREFCNT_dec (grp->sv2);
1775 grp->sv2 = newSVsv (callback);
1776 grp->feed = aio_grp_feed;
1777
1778 if (grp->int2 <= 0)
1779 grp->int2 = 2;
1780
1781 eio_grp_limit (grp, grp->int2);
1782}
1783

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines