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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.18 by root, Sun Jul 31 19:00:31 2005 UTC vs.
Revision 1.258 by root, Wed Jul 18 00:57:55 2018 UTC

1#include "libeio/xthread.h"
2
3#include <errno.h>
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#include "autoconf/config.h" 9#if !defined mg_findext
10# define mg_findext(sv,type,vtbl) mg_find (sv, type)
11#endif
6 12
13#include <stddef.h>
14#include <stdlib.h>
15#include <errno.h>
7#include <sys/types.h> 16#include <sys/types.h>
8#include <sys/stat.h> 17#include <sys/stat.h>
9
10#include <unistd.h> 18#include <limits.h>
11#include <fcntl.h> 19#include <fcntl.h>
12#include <signal.h>
13#include <sched.h> 20#include <sched.h>
14 21
15#ifndef _REENTRANT 22#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
16# define _REENTRANT 1 23# include <sys/mman.h>
24#endif
25
26/* the incompetent fool that created musl keeps __linux__, refuses
27 * to implement any linux standard apis, and also has no way to test
28 * for his broken iplementation. don't complain to me if this fails
29 * for you.
30 */
31#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
32# include <linux/fs.h>
33# ifdef FS_IOC_FIEMAP
34# include <linux/types.h>
35# include <linux/fiemap.h>
36# define HAVE_FIEMAP 1
17#endif 37# endif
18#include <errno.h> 38#endif
19 39
20#include <pthread.h> 40/* perl namespace pollution */
41#undef VERSION
21 42
22typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 43/* perl stupidly overrides readdir and maybe others */
23typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 44/* with thread-unsafe versions, imagine that :( */
24typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 45#undef readdir
46#undef opendir
47#undef closedir
25 48
26#if __ia64 49#ifdef _WIN32
27# define STACKSIZE 65536 50
51 // perl overrides all those nice libc functions
52
53 #undef malloc
54 #undef free
55 #undef open
56 #undef read
57 #undef write
58 #undef send
59 #undef recv
60 #undef stat
61 #undef lstat
62 #undef fstat
63 #undef truncate
64 #undef ftruncate
65 #undef open
66 #undef link
67 #undef close
68 #undef unlink
69 #undef mkdir
70 #undef rmdir
71 #undef rename
72 #undef lseek
73 #undef opendir
74 #undef readdir
75 #undef closedir
76 #undef chmod
77 #undef fchmod
78 #undef dup
79 #undef dup2
80 #undef abort
81 #undef pipe
82
83 #define EIO_STRUCT_STAT struct _stati64
84 #define EIO_STRUCT_STATI64
85
28#else 86#else
29# define STACKSIZE 4096 87
88 #include <sys/time.h>
89 #include <sys/select.h>
90 #include <unistd.h>
91 #include <utime.h>
92 #include <signal.h>
93
94 #define EIO_STRUCT_STAT Stat_t
95
96#endif
97
98/*****************************************************************************/
99
100#if __GNUC__ >= 3
101# define expect(expr,value) __builtin_expect ((expr),(value))
102#else
103# define expect(expr,value) (expr)
104#endif
105
106#define expect_false(expr) expect ((expr) != 0, 0)
107#define expect_true(expr) expect ((expr) != 0, 1)
108
109/*****************************************************************************/
110
111#include "libeio/config.h"
112
113#include "schmorp.h"
114
115#if HAVE_EVENTFD
116# include <sys/eventfd.h>
117#endif
118
119#if HAVE_TIMERFD
120# include <sys/timerfd.h>
121#endif
122
123#if HAVE_RLIMITS
124 #include <sys/time.h>
125 #include <sys/resource.h>
126#endif
127
128typedef SV SV8; /* byte-sv, used for argument-checking */
129typedef int aio_rfd; /* read file desriptor */
130typedef int aio_wfd; /* write file descriptor */
131
132static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
133
134#define EIO_REQ_MEMBERS \
135 SV *callback; \
136 SV *sv1, *sv2; \
137 SV *sv3, *sv4; \
138 STRLEN stroffset; \
139 SV *self;
140
141#define EIO_NO_WRAPPERS 1
142
143#include "libeio/eio.h"
144
145static int req_invoke (eio_req *req);
146#define EIO_FINISH(req) req_invoke (req)
147static void req_destroy (eio_req *grp);
148#define EIO_DESTROY(req) req_destroy (req)
149
150#include "libeio/eio.c"
151
152#if !HAVE_POSIX_FADVISE
153# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
154#endif
155
156#if !HAVE_POSIX_MADVISE
157# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
158#endif
159
160#ifndef MAP_ANONYMOUS
161# ifdef MAP_ANON
162# define MAP_ANONYMOUS MAP_ANON
163# else
164# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
30#endif 165# endif
166#endif
167
168/* defines all sorts of constants to 0 unless they are already defined */
169/* also provides const_iv_ and const_niv_ macros for them */
170#include "def0.h"
171
172#ifndef makedev
173# define makedev(maj,min) (((maj) << 8) | (min))
174#endif
175#ifndef major
176# define major(dev) ((dev) >> 8)
177#endif
178#ifndef minor
179# define minor(dev) ((dev) & 0xff)
180#endif
181
182#if PAGESIZE <= 0
183# define PAGESIZE sysconf (_SC_PAGESIZE)
184#endif
185
186/*****************************************************************************/
187
188#if !_POSIX_MAPPED_FILES
189# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
190# define munmap(addr,length) EIO_ENOSYS ()
191#endif
192
193#if !_POSIX_MEMORY_PROTECTION
194# define mprotect(addr,len,prot) EIO_ENOSYS ()
195#endif
196
197#if !MREMAP_MAYMOVE
198# define mremap(old_address,old_size,new_size,flags,new_address) (errno = ENOSYS, (void *)-1)
199#endif
200
201#define FOREIGN_MAGIC PERL_MAGIC_ext
202
203static int ecb_cold
204mmap_free (pTHX_ SV *sv, MAGIC *mg)
205{
206 int old_errno = errno;
207 munmap (mg->mg_ptr, (size_t)mg->mg_obj);
208 errno = old_errno;
209
210 mg->mg_obj = 0; /* just in case */
211
212 SvREADONLY_off (sv);
213
214 if (SvPVX (sv) != mg->mg_ptr)
215 croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
216
217 SvCUR_set (sv, 0);
218 SvPVX (sv) = 0;
219 SvOK_off (sv);
220
221 return 0;
222}
223
224static MGVTBL mmap_vtbl = {
225 0, 0, 0, 0, mmap_free
226};
227
228static int ecb_cold
229sysfree_free (pTHX_ SV *sv, MAGIC *mg)
230{
231 free (mg->mg_ptr);
232 mg->mg_obj = 0; /* just in case */
233
234 SvREADONLY_off (sv);
235
236 if (SvPVX (sv) != mg->mg_ptr)
237 croak ("ERROR: IO::AIO mapped scalar changed location, detected");
238
239 SvCUR_set (sv, 0);
240 SvPVX (sv) = 0;
241 SvOK_off (sv);
242
243 return 0;
244}
245
246static MGVTBL sysfree_vtbl = {
247 0, 0, 0, 0, sysfree_free
248};
249
250/*****************************************************************************/
251
252/* helper: set scalar to foreign ptr with custom free */
253static void
254sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
255{
256 sv_force_normal (sv);
257
258 /* we store the length in mg_obj, as namlen is I32 :/ */
259 sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
260 ->mg_obj = (SV *)length;
261
262 SvUPGRADE (sv, SVt_PV); /* nop... */
263
264 if (SvLEN (sv))
265 Safefree (SvPVX (sv));
266
267 SvPVX (sv) = (char *)addr;
268 SvCUR_set (sv, length);
269 SvLEN_set (sv, 0);
270 SvPOK_only (sv);
271}
272
273static void
274sv_clear_foreign (SV *sv)
275{
276 /* todo: iterate over magic and only free ours, but of course */
277 /* the perl5porters will call that (correct) behaviour buggy */
278 sv_unmagic (sv, FOREIGN_MAGIC);
279}
280
281/*****************************************************************************/
282
283static void
284fiemap (eio_req *req)
285{
286 req->result = -1;
287
288#if HAVE_FIEMAP
289 /* assume some c99 */
290 struct fiemap *fiemap = 0;
291 size_t end_offset;
292 int count = req->int3;
293
294 req->flags |= EIO_FLAG_PTR1_FREE;
295
296 /* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
297 /* increase in 3.5kb steps */
298 if (count < 0)
299 count = 8;
300
301 fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
302 errno = ENOMEM;
303 if (!fiemap)
304 return;
305
306 req->ptr1 = fiemap;
307
308 fiemap->fm_start = req->offs;
309 fiemap->fm_length = req->size;
310 fiemap->fm_flags = req->int2;
311 fiemap->fm_extent_count = count;
312
313 if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
314 return;
315
316 if (req->int3 >= 0 /* not autosizing */
317 || !fiemap->fm_mapped_extents /* no more extents */
318 || fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
319 goto done;
320
321 /* else we have to loop -
322 * it would be tempting (actually I tried that first) to just query the
323 * number of extents needed, but linux often feels like not returning all
324 * extents, without telling us it left any out. this complicates
325 * this quite a bit.
326 */
327
328 end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
329
330 for (;;)
331 {
332 /* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
333 char scratch[3072];
334 struct fiemap *incmap = (struct fiemap *)scratch;
335
336 incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
337 + fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
338 incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
339 incmap->fm_flags = fiemap->fm_flags;
340 incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
341
342 if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
343 return;
344
345 if (!incmap->fm_mapped_extents)
346 goto done;
347
348 count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
349 fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
350 errno = ENOMEM;
351 if (!fiemap)
352 return;
353
354 req->ptr1 = fiemap;
355
356 for (count = 0; count < incmap->fm_mapped_extents; ++count)
357 {
358 struct fiemap_extent *e = incmap->fm_extents + count;
359
360 if (e->fe_logical + e->fe_length >= end_offset)
361 goto done;
362
363 fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
364
365 if (e->fe_flags & FIEMAP_EXTENT_LAST)
366 goto done;
367
368 }
369 }
370
371done:
372 req->result = 0;
373
374#else
375 errno = ENOSYS;
376#endif
377}
378
379/*****************************************************************************/
31 380
32enum { 381enum {
33 REQ_QUIT, 382 FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
34 REQ_OPEN, REQ_CLOSE,
35 REQ_READ, REQ_WRITE, REQ_READAHEAD,
36 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
37 REQ_FSYNC, REQ_FDATASYNC,
38}; 383};
39 384
40typedef struct aio_cb {
41 struct aio_cb *volatile next;
42
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;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb;
57
58typedef aio_cb *aio_req; 385typedef eio_req *aio_req;
386typedef eio_req *aio_req_ornot;
387typedef eio_wd aio_wd;
59 388
60static int started; 389static SV *on_next_submit;
61static volatile int nreqs; 390static int next_pri = EIO_PRI_DEFAULT;
62static int max_outstanding = 1<<30; 391static int max_outstanding;
63static int respipe [2];
64 392
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 393static s_epipe respipe;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68 394
69static volatile aio_req reqs, reqe; /* queue start, queue end */ 395static void req_destroy (aio_req req);
70static volatile aio_req ress, rese; /* queue start, queue end */ 396static void req_cancel (aio_req req);
71 397
72static void 398static void
73poll_wait () 399want_poll (void)
74{ 400{
75 if (nreqs && !ress) 401 /* write a dummy byte to the pipe so fh becomes ready */
402 s_epipe_signal (&respipe);
403}
404
405static void
406done_poll (void)
407{
408 /* read any signals sent by the worker threads */
409 s_epipe_drain (&respipe);
410}
411
412/* must be called at most once */
413static SV *
414req_sv (aio_req req, HV *stash)
415{
416 if (!req->self)
76 { 417 {
77 fd_set rfd; 418 req->self = (SV *)newHV ();
78 FD_ZERO(&rfd); 419 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
79 FD_SET(respipe [0], &rfd);
80
81 select (respipe [0] + 1, &rfd, 0, 0, 0);
82 } 420 }
421
422 return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
423}
424
425static SV *
426newSVaio_wd (aio_wd wd)
427{
428 return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
429}
430
431static aio_req
432SvAIO_REQ (SV *sv)
433{
434 MAGIC *mg;
435
436 if (!SvROK (sv)
437 /* for speed reasons, we do not verify that SvROK actually has a stash ptr */
438 || (SvSTASH (SvRV (sv)) != aio_grp_stash
439 && SvSTASH (SvRV (sv)) != aio_req_stash
440 && !sv_derived_from (sv, "IO::AIO::REQ")))
441 croak ("object of class IO::AIO::REQ expected");
442
443 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
444
445 return mg ? (aio_req)mg->mg_ptr : 0;
446}
447
448static aio_wd
449SvAIO_WD (SV *sv)
450{
451 if (!SvROK (sv)
452 || SvTYPE (SvRV (sv)) != SVt_PVMG
453 || SvSTASH (SvRV (sv)) != aio_wd_stash)
454 croak ("IO::AIO: expected a working directory object as returned by aio_wd");
455
456 return (aio_wd)(long)SvIVX (SvRV (sv));
457}
458
459static SV *
460newmortalFH (int fd, int flags)
461{
462 if (fd < 0)
463 return &PL_sv_undef;
464
465 GV *gv = (GV *)sv_newmortal ();
466 char sym[64];
467 int symlen;
468
469 symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
470 gv_init (gv, aio_stash, sym, symlen, 0);
471
472 symlen = snprintf (
473 sym,
474 sizeof (sym),
475 "%s&=%d",
476 flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
477 fd
478 );
479
480 return do_open (gv, sym, symlen, 0, 0, 0, 0)
481 ? (SV *)gv : &PL_sv_undef;
482}
483
484static void
485aio_grp_feed (aio_req grp)
486{
487 if (grp->sv2 && SvOK (grp->sv2))
488 {
489 dSP;
490
491 ENTER;
492 SAVETMPS;
493 PUSHMARK (SP);
494 XPUSHs (req_sv (grp, aio_grp_stash));
495 PUTBACK;
496 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
497 SPAGAIN;
498 FREETMPS;
499 LEAVE;
500 }
501}
502
503static void
504req_submit (eio_req *req)
505{
506 eio_submit (req);
507
508 if (expect_false (on_next_submit))
509 {
510 dSP;
511 SV *cb = sv_2mortal (on_next_submit);
512
513 on_next_submit = 0;
514
515 PUSHMARK (SP);
516 PUTBACK;
517 call_sv (cb, G_DISCARD | G_EVAL);
518 }
83} 519}
84 520
85static int 521static int
86poll_cb () 522req_invoke (eio_req *req)
87{ 523{
88 dSP; 524 if (req->flags & FLAG_SV2_RO_OFF)
89 int count = 0; 525 SvREADONLY_off (req->sv2);
90 aio_req req, prv;
91 526
92 pthread_mutex_lock (&reslock); 527 if (!EIO_CANCELLED (req) && req->callback)
93
94 {
95 /* read any signals sent by the worker threads */
96 char buf [32];
97 while (read (respipe [0], buf, 32) > 0)
98 ;
99 }
100
101 req = ress;
102 ress = rese = 0;
103
104 pthread_mutex_unlock (&reslock);
105
106 while (req)
107 { 528 {
108 nreqs--; 529 dSP;
530 static SV *sv_result_cache; /* caches the result integer SV */
531 SV *sv_result;
109 532
110 if (req->type == REQ_QUIT) 533 ENTER;
111 started--; 534 SAVETMPS;
112 else 535 PUSHMARK (SP);
536 EXTEND (SP, 1);
537
538 /* do not recreate the result IV from scratch each time */
539 if (expect_true (sv_result_cache))
113 { 540 {
114 int errorno = errno; 541 sv_result = sv_result_cache; sv_result_cache = 0;
115 errno = req->errorno; 542 SvIV_set (sv_result, req->result);
116 543 SvIOK_only (sv_result);
117 if (req->type == REQ_READ)
118 SvCUR_set (req->data, req->dataoffset
119 + req->result > 0 ? req->result : 0);
120
121 if (req->data)
122 SvREFCNT_dec (req->data);
123
124 if (req->fh)
125 SvREFCNT_dec (req->fh);
126
127 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128 {
129 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
130 PL_laststatval = req->result;
131 PL_statcache = *(req->statdata);
132
133 Safefree (req->statdata);
134 }
135
136 ENTER;
137 PUSHMARK (SP);
138 XPUSHs (sv_2mortal (newSViv (req->result)));
139
140 if (req->type == REQ_OPEN)
141 {
142 /* convert fd to fh */
143 SV *fh;
144
145 PUTBACK;
146 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147 SPAGAIN;
148
149 fh = SvREFCNT_inc (POPs);
150
151 PUSHMARK (SP);
152 XPUSHs (sv_2mortal (fh));
153 }
154
155 if (SvOK (req->callback))
156 {
157 PUTBACK;
158 call_sv (req->callback, G_VOID | G_EVAL);
159 SPAGAIN;
160 }
161
162 LEAVE;
163
164 if (req->callback)
165 SvREFCNT_dec (req->callback);
166
167 errno = errorno;
168 count++;
169 }
170
171 prv = req;
172 req = req->next;
173 Safefree (prv);
174
175 /* TODO: croak on errors? */
176 }
177
178 return count;
179}
180
181static void *aio_proc(void *arg);
182
183static void
184start_thread (void)
185{
186 sigset_t fullsigset, oldsigset;
187 pthread_t tid;
188 pthread_attr_t attr;
189
190 pthread_attr_init (&attr);
191 pthread_attr_setstacksize (&attr, STACKSIZE);
192 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193
194 sigfillset (&fullsigset);
195 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
196
197 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
198 started++;
199
200 sigprocmask (SIG_SETMASK, &oldsigset, 0);
201}
202
203static void
204send_req (aio_req req)
205{
206 nreqs++;
207
208 pthread_mutex_lock (&reqlock);
209
210 req->next = 0;
211
212 if (reqe)
213 {
214 reqe->next = req;
215 reqe = req;
216 }
217 else
218 reqe = reqs = req;
219
220 pthread_cond_signal (&reqwait);
221 pthread_mutex_unlock (&reqlock);
222
223 while (nreqs > max_outstanding)
224 {
225 poll_wait ();
226 poll_cb ();
227 }
228}
229
230static void
231end_thread (void)
232{
233 aio_req req;
234 New (0, req, 1, aio_cb);
235 req->type = REQ_QUIT;
236
237 send_req (req);
238}
239
240/* work around various missing functions */
241
242#if !HAVE_PREADWRITE
243# define pread aio_pread
244# define pwrite aio_pwrite
245
246/*
247 * make our pread/pwrite safe against themselves, but not against
248 * normal read/write by using a mutex. slows down execution a lot,
249 * but that's your problem, not mine.
250 */
251static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
252
253static ssize_t
254pread (int fd, void *buf, size_t count, off_t offset)
255{
256 ssize_t res;
257 off_t ooffset;
258
259 pthread_mutex_lock (&iolock);
260 ooffset = lseek (fd, 0, SEEK_CUR);
261 lseek (fd, offset, SEEK_SET);
262 res = read (fd, buf, count);
263 lseek (fd, ooffset, SEEK_SET);
264 pthread_mutex_unlock (&iolock);
265
266 return res;
267}
268
269static ssize_t
270pwrite (int fd, void *buf, size_t count, off_t offset)
271{
272 ssize_t res;
273 off_t ooffset;
274
275 pthread_mutex_lock (&iolock);
276 ooffset = lseek (fd, 0, SEEK_CUR);
277 lseek (fd, offset, SEEK_SET);
278 res = write (fd, buf, count);
279 lseek (fd, offset, SEEK_SET);
280 pthread_mutex_unlock (&iolock);
281
282 return res;
283}
284#endif
285
286#if !HAVE_FDATASYNC
287# define fdatasync fsync
288#endif
289
290#if !HAVE_READAHEAD
291# define readahead aio_readahead
292
293static char readahead_buf[4096];
294
295static ssize_t
296readahead (int fd, off_t offset, size_t count)
297{
298 while (count > 0)
299 {
300 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
301
302 pread (fd, readahead_buf, len, offset);
303 offset += len;
304 count -= len;
305 }
306
307 errno = 0;
308}
309#endif
310
311static void *
312aio_proc (void *thr_arg)
313{
314 aio_req req;
315 int type;
316
317 do
318 {
319 pthread_mutex_lock (&reqlock);
320
321 for (;;)
322 {
323 req = reqs;
324
325 if (reqs)
326 {
327 reqs = reqs->next;
328 if (!reqs) reqe = 0;
329 }
330
331 if (req)
332 break;
333
334 pthread_cond_wait (&reqwait, &reqlock);
335 }
336
337 pthread_mutex_unlock (&reqlock);
338
339 errno = 0; /* strictly unnecessary */
340
341 type = req->type;
342
343 switch (type)
344 {
345 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
346 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
347
348 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
349
350 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
351 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355 case REQ_CLOSE: req->result = close (req->fd); break;
356 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359 case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361 case REQ_QUIT:
362 break;
363
364 default:
365 req->result = ENOSYS;
366 break;
367 }
368
369 req->errorno = errno;
370
371 pthread_mutex_lock (&reslock);
372
373 req->next = 0;
374
375 if (rese)
376 {
377 rese->next = req;
378 rese = req;
379 } 544 }
380 else 545 else
381 { 546 {
382 rese = ress = req; 547 sv_result = newSViv (req->result);
383 548 SvREADONLY_on (sv_result);
384 /* write a dummy byte to the pipe so fh becomes ready */
385 write (respipe [1], &respipe, 1);
386 } 549 }
387 550
388 pthread_mutex_unlock (&reslock); 551 switch (req->type)
552 {
553 case EIO_WD_OPEN:
554 PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
555 break;
556
557 case EIO_READDIR:
558 {
559 SV *rv = &PL_sv_undef;
560
561 if (req->result >= 0)
562 {
563 int i;
564 char *names = (char *)req->ptr2;
565 eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
566 AV *av = newAV ();
567
568 av_extend (av, req->result - 1);
569
570 for (i = 0; i < req->result; ++i)
571 {
572 if (req->int1 & EIO_READDIR_DENTS)
573 {
574 SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
575
576 if (req->int1 & EIO_READDIR_CUSTOM2)
577 {
578 static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
579 AV *avent = newAV ();
580
581 av_extend (avent, 2);
582
583 if (!sv_type [ent->type])
584 {
585 sv_type [ent->type] = newSViv (ent->type);
586 SvREADONLY_on (sv_type [ent->type]);
587 }
588
589 av_store (avent, 0, namesv);
590 av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
591 av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
592
593 av_store (av, i, newRV_noinc ((SV *)avent));
594 }
595 else
596 av_store (av, i, namesv);
597
598 ++ent;
599 }
600 else
601 {
602 SV *name = newSVpv (names, 0);
603 av_store (av, i, name);
604 names += SvCUR (name) + 1;
605 }
606 }
607
608 rv = sv_2mortal (newRV_noinc ((SV *)av));
609 }
610
611 PUSHs (rv);
612
613 if (req->int1 & EIO_READDIR_CUSTOM1)
614 XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
615 }
616 break;
617
618 case EIO_OPEN:
619 PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
620 break;
621
622 case EIO_STATVFS:
623 case EIO_FSTATVFS:
624 {
625 SV *rv = &PL_sv_undef;
626
627#ifndef _WIN32
628 if (req->result >= 0)
629 {
630 EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
631 HV *hv = newHV ();
632 /* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
633 * chooses to make it a struct.
634 */
635 unsigned long fsid = 0;
636 memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
637
638 rv = sv_2mortal (newRV_noinc ((SV *)hv));
639
640 hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
641 hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
642 hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
643 hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
644 hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
645 hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
646 hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
647 hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
648 hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
649 hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
650 hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
651 }
652#endif
653
654 PUSHs (rv);
655 }
656
657 break;
658
659 case EIO_GROUP:
660 req->int1 = 2; /* mark group as finished */
661
662 if (req->sv1)
663 {
664 int i;
665 AV *av = (AV *)req->sv1;
666
667 EXTEND (SP, AvFILL (av) + 1);
668 for (i = 0; i <= AvFILL (av); ++i)
669 PUSHs (*av_fetch (av, i, 0));
670 }
671 break;
672
673 case EIO_NOP:
674 case EIO_BUSY:
675 break;
676
677 case EIO_READLINK:
678 case EIO_REALPATH:
679 if (req->result > 0)
680 PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
681 break;
682
683 case EIO_STAT:
684 case EIO_LSTAT:
685 case EIO_FSTAT:
686 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
687
688 if (!(PL_laststatval = req->result))
689 /* if compilation fails here then perl's Stat_t is not struct _stati64 */
690 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
691
692 PUSHs (sv_result);
693 break;
694
695 case EIO_SEEK:
696 PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
697 break;
698
699 case EIO_READ:
700 {
701 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
702 *SvEND (req->sv2) = 0;
703 SvPOK_only (req->sv2);
704 SvSETMAGIC (req->sv2);
705 PUSHs (sv_result);
706 }
707 break;
708
709 case EIO_SLURP:
710 {
711 if (req->result >= 0)
712 {
713 /* if length was originally not known, we steal the malloc'ed memory */
714 if (req->flags & EIO_FLAG_PTR2_FREE)
715 {
716 req->flags &= ~EIO_FLAG_PTR2_FREE;
717 sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
718 }
719 else
720 {
721 SvCUR_set (req->sv2, req->result);
722 *SvEND (req->sv2) = 0;
723 SvPOK_only (req->sv2);
724 }
725
726 SvSETMAGIC (req->sv2);
727 }
728
729 PUSHs (sv_result);
730 }
731 break;
732
733 case EIO_CUSTOM:
734 if (req->feed == fiemap)
735 {
736#if HAVE_FIEMAP
737 if (!req->result)
738 {
739 struct fiemap *fiemap = (struct fiemap *)req->ptr1;
740
741 if (fiemap->fm_extent_count)
742 {
743 AV *av = newAV ();
744 int i;
745
746 while (fiemap->fm_mapped_extents)
747 {
748 struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
749 AV *ext_av = newAV ();
750
751 av_store (ext_av, 3, newSVuv (extent->fe_flags));
752 av_store (ext_av, 2, newSVval64 (extent->fe_length));
753 av_store (ext_av, 1, newSVval64 (extent->fe_physical));
754 av_store (ext_av, 0, newSVval64 (extent->fe_logical));
755
756 av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
757 }
758
759 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
760 }
761 else
762 {
763 SvIV_set (sv_result, fiemap->fm_mapped_extents);
764 PUSHs (sv_result);
765 }
766 }
767#endif
768 }
769 else
770 PUSHs (sv_result);
771 break;
772
773 case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
774 if (req->result > 0)
775 SvIV_set (sv_result, 0);
776 /* FALLTHROUGH */
777
778 default:
779 PUSHs (sv_result);
780 break;
781 }
782
783 errno = req->errorno;
784
785 PUTBACK;
786 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
787 SPAGAIN;
788
789 if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
790 SvREFCNT_dec (sv_result);
791 else
792 sv_result_cache = sv_result;
793
794 FREETMPS;
795 LEAVE;
796
797 PUTBACK;
389 } 798 }
390 while (type != REQ_QUIT);
391 799
800 return !!SvTRUE (ERRSV);
801}
802
803static void
804req_destroy (aio_req req)
805{
806 if (req->self)
807 {
808 sv_unmagic (req->self, PERL_MAGIC_ext);
809 SvREFCNT_dec (req->self);
810 }
811
812 SvREFCNT_dec (req->sv1);
813 SvREFCNT_dec (req->sv2);
814 SvREFCNT_dec (req->sv3);
815 SvREFCNT_dec (req->sv4);
816 SvREFCNT_dec (req->callback);
817
818 free (req);
819}
820
821static void
822req_cancel_subs (aio_req grp)
823{
824 if (grp->type != EIO_GROUP)
825 return;
826
827 SvREFCNT_dec (grp->sv2);
828 grp->sv2 = 0;
829
830 eio_grp_cancel (grp);
831}
832
833static void ecb_cold
834create_respipe (void)
835{
836 if (s_epipe_renew (&respipe))
837 croak ("IO::AIO: unable to initialize result pipe");
838}
839
840static void
841poll_wait (void)
842{
843 while (eio_nreqs ())
844 {
845 int size;
846
847 X_LOCK (EIO_POOL->reslock);
848 size = EIO_POOL->res_queue.size;
849 X_UNLOCK (EIO_POOL->reslock);
850
851 if (size)
852 return;
853
854 etp_maybe_start_thread (EIO_POOL);
855
856 s_epipe_wait (&respipe);
857 }
858}
859
860static int
861poll_cb (void)
862{
863 for (;;)
864 {
865 int res = eio_poll ();
866
867 if (res > 0)
868 croak (0);
869
870 if (!max_outstanding || max_outstanding > eio_nreqs ())
871 return res;
872
873 poll_wait ();
874 }
875}
876
877static void ecb_cold
878reinit (void)
879{
880 create_respipe ();
881
882 if (eio_init (want_poll, done_poll) < 0)
883 croak ("IO::AIO: unable to initialise eio library");
884}
885
886/*****************************************************************************/
887
888static SV *
889get_cb (SV *cb_sv)
890{
891 SvGETMAGIC (cb_sv);
892 return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
893}
894
895static aio_req ecb_noinline
896dreq (SV *callback)
897{
898 SV *cb_cv;
899 aio_req req;
900 int req_pri = next_pri;
901 next_pri = EIO_PRI_DEFAULT;
902
903 cb_cv = get_cb (callback);
904
905 req = calloc (sizeof (*req), 1);
906 if (!req)
907 croak ("out of memory during eio_req allocation");
908
909 req->callback = SvREFCNT_inc (cb_cv);
910 req->pri = req_pri;
911
392 return 0; 912 return req;
393} 913}
914
915#define dREQ \
916 aio_req req = dreq (callback); \
917
918#define REQ_SEND \
919 PUTBACK; \
920 req_submit (req); \
921 SPAGAIN; \
922 \
923 if (GIMME_V != G_VOID) \
924 XPUSHs (req_sv (req, aio_req_stash));
925
926ecb_inline void
927req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
928{
929 if (expect_false (SvROK (path)))
930 {
931 SV *rv = SvRV (path);
932 SV *wdob;
933
934 if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
935 {
936 path = AvARRAY (rv)[1];
937 wdob = AvARRAY (rv)[0];
938
939 if (SvOK (wdob))
940 {
941 *wd = SvAIO_WD (wdob);
942 *wdsv = SvREFCNT_inc_NN (SvRV (wdob));
943 }
944 else
945 *wd = EIO_INVALID_WD;
946 }
947 else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
948 {
949 *wd = (aio_wd)(long)SvIVX (rv);
950 *wdsv = SvREFCNT_inc_NN (rv);
951 *ptr = ".";
952 return; /* path set to "." */
953 }
954 else
955 croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
956 }
957
958 *pathsv = newSVsv (path);
959 *ptr = SvPVbyte_nolen (*pathsv);
960}
961
962static void ecb_noinline
963req_set_path1 (aio_req req, SV *path)
964{
965 req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
966}
967
968static void ecb_noinline
969req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
970{
971 SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
972
973 switch (SvTYPE (rv))
974 {
975 case SVt_PVIO:
976 case SVt_PVLV:
977 case SVt_PVGV:
978 req->type = type_fh;
979 req->sv1 = newSVsv (fh_or_path);
980 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
981 break;
982
983 default:
984 req->type = type_path;
985 req_set_path1 (req, fh_or_path);
986 break;
987 }
988}
989
990/*****************************************************************************/
991
992static void
993ts_set (struct timespec *ts, NV value)
994{
995 ts->tv_sec = value;
996 ts->tv_nsec = (value - ts->tv_sec) * 1e9;
997}
998
999static NV
1000ts_get (const struct timespec *ts)
1001{
1002 return ts->tv_sec + ts->tv_nsec * 1e-9;
1003}
1004
1005/*****************************************************************************/
1006
1007XS(boot_IO__AIO) ecb_cold;
394 1008
395MODULE = IO::AIO PACKAGE = IO::AIO 1009MODULE = IO::AIO PACKAGE = IO::AIO
396 1010
397PROTOTYPES: ENABLE 1011PROTOTYPES: ENABLE
398 1012
399BOOT: 1013BOOT:
400{ 1014{
401 if (pipe (respipe)) 1015 static const struct {
402 croak ("unable to initialize result pipe"); 1016 const char *name;
1017 IV iv;
1018 } *civ, const_iv[] = {
1019# define const_niv(name, value) { # name, (IV) value },
1020# define const_iv(name) { # name, (IV) name },
1021# define const_eio(name) { # name, (IV) EIO_ ## name },
403 1022
404 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1023 /* you have to re-run ./gendef0 after adding/removing any constants here */
405 croak ("cannot set result pipe to nonblocking mode"); 1024 /* the first block can be undef if missing */
1025 const_iv (ENOSYS)
1026 const_iv (EXDEV)
1027 const_iv (EBADR)
406 1028
407 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1029 /* for lseek */
408 croak ("cannot set result pipe to nonblocking mode"); 1030 const_iv (SEEK_DATA)
409} 1031 const_iv (SEEK_HOLE)
410 1032
1033 const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
1034 const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
1035 const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
1036 const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
1037 const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
1038 const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
1039
1040 const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
1041 const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
1042 const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
1043 const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
1044 const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
1045
1046 /* the second block will be 0 when missing */
1047 const_iv (O_RDONLY)
1048 const_iv (O_WRONLY)
1049 const_iv (O_RDWR)
1050 const_iv (O_CREAT)
1051 const_iv (O_TRUNC)
1052 const_iv (O_EXCL)
1053 const_iv (O_APPEND)
1054
1055 const_iv (O_ASYNC)
1056 const_iv (O_DIRECT)
1057 const_iv (O_NOATIME)
1058
1059 const_iv (O_CLOEXEC)
1060 const_iv (O_NOCTTY)
1061 const_iv (O_NOFOLLOW)
1062 const_iv (O_NONBLOCK)
1063 const_iv (O_EXEC)
1064 const_iv (O_SEARCH)
1065 const_iv (O_DIRECTORY)
1066 const_iv (O_DSYNC)
1067 const_iv (O_RSYNC)
1068 const_iv (O_SYNC)
1069 const_iv (O_PATH)
1070 const_iv (O_TMPFILE)
1071 const_iv (O_TTY_INIT)
1072
1073 const_iv (S_IFIFO)
1074 const_iv (S_IFCHR)
1075 const_iv (S_IFBLK)
1076 const_iv (S_IFLNK)
1077 const_iv (S_IFREG)
1078 const_iv (S_IFDIR)
1079 const_iv (S_IFWHT)
1080 const_iv (S_IFSOCK)
1081 const_iv (S_IFMT)
1082
1083 const_iv (ST_RDONLY)
1084 const_iv (ST_NOSUID)
1085 const_iv (ST_NODEV)
1086 const_iv (ST_NOEXEC)
1087 const_iv (ST_SYNCHRONOUS)
1088 const_iv (ST_MANDLOCK)
1089 const_iv (ST_WRITE)
1090 const_iv (ST_APPEND)
1091 const_iv (ST_IMMUTABLE)
1092 const_iv (ST_NOATIME)
1093 const_iv (ST_NODIRATIME)
1094 const_iv (ST_RELATIME)
1095
1096 const_iv (PROT_NONE)
1097 const_iv (PROT_EXEC)
1098 const_iv (PROT_READ)
1099 const_iv (PROT_WRITE)
1100
1101 const_iv (MAP_PRIVATE)
1102 const_iv (MAP_SHARED)
1103 const_iv (MAP_FIXED)
1104 const_iv (MAP_ANONYMOUS)
1105
1106 /* linuxish */
1107 const_iv (MAP_LOCKED)
1108 const_iv (MAP_NORESERVE)
1109 const_iv (MAP_POPULATE)
1110 const_iv (MAP_NONBLOCK)
1111 const_iv (MAP_GROWSDOWN)
1112 const_iv (MAP_32BIT)
1113 const_iv (MAP_HUGETLB)
1114 const_iv (MAP_STACK)
1115
1116 const_iv (MREMAP_MAYMOVE)
1117 const_iv (MREMAP_FIXED)
1118
1119 const_iv (F_DUPFD_CLOEXEC)
1120
1121 const_iv (F_OFD_GETLK)
1122 const_iv (F_OFD_SETLK)
1123 const_iv (F_OFD_GETLKW)
1124
1125 const_iv (FIFREEZE)
1126 const_iv (FITHAW)
1127 const_iv (FITRIM)
1128 const_iv (FICLONE)
1129 const_iv (FICLONERANGE)
1130 const_iv (FIDEDUPERANGE)
1131
1132 const_iv (FS_IOC_GETFLAGS)
1133 const_iv (FS_IOC_SETFLAGS)
1134 const_iv (FS_IOC_GETVERSION)
1135 const_iv (FS_IOC_SETVERSION)
1136 const_iv (FS_IOC_FIEMAP)
1137 const_iv (FS_IOC_FSGETXATTR)
1138 const_iv (FS_IOC_FSSETXATTR)
1139 const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
1140 const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
1141 const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
1142
1143 const_iv (FS_KEY_DESCRIPTOR_SIZE)
1144
1145 const_iv (FS_SECRM_FL)
1146 const_iv (FS_UNRM_FL)
1147 const_iv (FS_COMPR_FL)
1148 const_iv (FS_SYNC_FL)
1149 const_iv (FS_IMMUTABLE_FL)
1150 const_iv (FS_APPEND_FL)
1151 const_iv (FS_NODUMP_FL)
1152 const_iv (FS_NOATIME_FL)
1153 const_iv (FS_DIRTY_FL)
1154 const_iv (FS_COMPRBLK_FL)
1155 const_iv (FS_NOCOMP_FL)
1156 const_iv (FS_ENCRYPT_FL)
1157 const_iv (FS_BTREE_FL)
1158 const_iv (FS_INDEX_FL)
1159 const_iv (FS_JOURNAL_DATA_FL)
1160 const_iv (FS_NOTAIL_FL)
1161 const_iv (FS_DIRSYNC_FL)
1162 const_iv (FS_TOPDIR_FL)
1163 const_iv (FS_FL_USER_MODIFIABLE)
1164
1165 const_iv (FS_XFLAG_REALTIME)
1166 const_iv (FS_XFLAG_PREALLOC)
1167 const_iv (FS_XFLAG_IMMUTABLE)
1168 const_iv (FS_XFLAG_APPEND)
1169 const_iv (FS_XFLAG_SYNC)
1170 const_iv (FS_XFLAG_NOATIME)
1171 const_iv (FS_XFLAG_NODUMP)
1172 const_iv (FS_XFLAG_RTINHERIT)
1173 const_iv (FS_XFLAG_PROJINHERIT)
1174 const_iv (FS_XFLAG_NOSYMLINKS)
1175 const_iv (FS_XFLAG_EXTSIZE)
1176 const_iv (FS_XFLAG_EXTSZINHERIT)
1177 const_iv (FS_XFLAG_NODEFRAG)
1178 const_iv (FS_XFLAG_FILESTREAM)
1179 const_iv (FS_XFLAG_DAX)
1180 const_iv (FS_XFLAG_HASATTR)
1181
1182 const_iv (FIEMAP_FLAG_SYNC)
1183 const_iv (FIEMAP_FLAG_XATTR)
1184 const_iv (FIEMAP_FLAGS_COMPAT)
1185 const_iv (FIEMAP_EXTENT_LAST)
1186 const_iv (FIEMAP_EXTENT_UNKNOWN)
1187 const_iv (FIEMAP_EXTENT_DELALLOC)
1188 const_iv (FIEMAP_EXTENT_ENCODED)
1189 const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
1190 const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
1191 const_iv (FIEMAP_EXTENT_DATA_INLINE)
1192 const_iv (FIEMAP_EXTENT_DATA_TAIL)
1193 const_iv (FIEMAP_EXTENT_UNWRITTEN)
1194 const_iv (FIEMAP_EXTENT_MERGED)
1195 const_iv (FIEMAP_EXTENT_SHARED)
1196
1197 const_iv (SPLICE_F_MOVE)
1198 const_iv (SPLICE_F_NONBLOCK)
1199 const_iv (SPLICE_F_MORE)
1200 const_iv (SPLICE_F_GIFT)
1201
1202 const_iv (EFD_CLOEXEC)
1203 const_iv (EFD_NONBLOCK)
1204 const_iv (EFD_SEMAPHORE)
1205
1206 const_iv (CLOCK_REALTIME)
1207 const_iv (CLOCK_MONOTONIC)
1208 const_iv (CLOCK_BOOTTIME)
1209 const_iv (CLOCK_REALTIME_ALARM)
1210 const_iv (CLOCK_BOOTTIME_ALARM)
1211
1212 const_iv (TFD_NONBLOCK)
1213 const_iv (TFD_CLOEXEC)
1214
1215 const_iv (TFD_TIMER_ABSTIME)
1216 const_iv (TFD_TIMER_CANCEL_ON_SET)
1217
1218 /* these are libeio constants, and are independent of gendef0 */
1219 const_eio (SEEK_SET)
1220 const_eio (SEEK_CUR)
1221 const_eio (SEEK_END)
1222
1223 const_eio (MCL_FUTURE)
1224 const_eio (MCL_CURRENT)
1225
1226 const_eio (MS_ASYNC)
1227 const_eio (MS_INVALIDATE)
1228 const_eio (MS_SYNC)
1229
1230 const_eio (MT_MODIFY)
1231
1232 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
1233 const_eio (SYNC_FILE_RANGE_WRITE)
1234 const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
1235
1236 const_eio (FALLOC_FL_KEEP_SIZE)
1237 const_eio (FALLOC_FL_PUNCH_HOLE)
1238 const_eio (FALLOC_FL_COLLAPSE_RANGE)
1239 const_eio (FALLOC_FL_ZERO_RANGE)
1240 const_eio (FALLOC_FL_INSERT_RANGE)
1241 const_eio (FALLOC_FL_UNSHARE_RANGE)
1242
1243 const_eio (RENAME_NOREPLACE)
1244 const_eio (RENAME_EXCHANGE)
1245 const_eio (RENAME_WHITEOUT)
1246
1247 const_eio (READDIR_DENTS)
1248 const_eio (READDIR_DIRS_FIRST)
1249 const_eio (READDIR_STAT_ORDER)
1250 const_eio (READDIR_FOUND_UNKNOWN)
1251
1252 const_eio (DT_UNKNOWN)
1253 const_eio (DT_FIFO)
1254 const_eio (DT_CHR)
1255 const_eio (DT_DIR)
1256 const_eio (DT_BLK)
1257 const_eio (DT_REG)
1258 const_eio (DT_LNK)
1259 const_eio (DT_SOCK)
1260 const_eio (DT_WHT)
1261 };
1262
1263 aio_stash = gv_stashpv ("IO::AIO" , 1);
1264 aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1265 aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1266 aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1267
1268 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1269 newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1270
1271 newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1272
1273 reinit ();
1274}
1275
411void 1276void
412min_parallel(nthreads) 1277reinit ()
413 int nthreads 1278 PROTOTYPE:
1279
1280void
1281max_poll_reqs (unsigned int nreqs)
414 PROTOTYPE: $ 1282 PROTOTYPE: $
415 CODE: 1283 CODE:
416 while (nthreads > started) 1284 eio_set_max_poll_reqs (nreqs);
417 start_thread ();
418 1285
419void 1286void
420max_parallel(nthreads) 1287max_poll_time (double nseconds)
421 int nthreads
422 PROTOTYPE: $ 1288 PROTOTYPE: $
423 CODE: 1289 CODE:
1290 eio_set_max_poll_time (nseconds);
1291
1292void
1293min_parallel (unsigned int nthreads)
1294 PROTOTYPE: $
1295 CODE:
1296 eio_set_min_parallel (nthreads);
1297
1298void
1299max_parallel (unsigned int nthreads)
1300 PROTOTYPE: $
1301 CODE:
1302 eio_set_max_parallel (nthreads);
1303
1304void
1305max_idle (unsigned int nthreads)
1306 PROTOTYPE: $
1307 CODE:
1308 eio_set_max_idle (nthreads);
1309
1310void
1311idle_timeout (unsigned int seconds)
1312 PROTOTYPE: $
1313 CODE:
1314 eio_set_idle_timeout (seconds);
1315
1316void
1317max_outstanding (unsigned int maxreqs)
1318 PROTOTYPE: $
1319 CODE:
1320 max_outstanding = maxreqs;
1321
1322void
1323aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
1324 PPCODE:
424{ 1325{
425 int cur = started; 1326 dREQ;
426 while (cur > nthreads) 1327
427 { 1328 req->type = EIO_WD_OPEN;
428 end_thread (); 1329 req_set_path1 (req, pathname);
1330
1331 REQ_SEND;
1332}
1333
1334void
1335aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
1336 PPCODE:
1337{
1338 dREQ;
1339
1340 req->type = EIO_OPEN;
1341 req_set_path1 (req, pathname);
1342 req->int1 = flags;
1343 req->int2 = mode;
1344
1345 REQ_SEND;
1346}
1347
1348void
1349aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
1350 ALIAS:
1351 aio_fsync = EIO_FSYNC
1352 aio_fdatasync = EIO_FDATASYNC
1353 aio_syncfs = EIO_SYNCFS
1354 PPCODE:
1355{
1356 int fd = s_fileno_croak (fh, 0);
1357 dREQ;
1358
1359 req->type = ix;
1360 req->sv1 = newSVsv (fh);
1361 req->int1 = fd;
1362
1363 REQ_SEND;
1364}
1365
1366void
1367aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
1368 PPCODE:
1369{
1370 int fd = s_fileno_croak (fh, 0);
1371 dREQ;
1372
1373 req->type = EIO_SYNC_FILE_RANGE;
1374 req->sv1 = newSVsv (fh);
1375 req->int1 = fd;
1376 req->offs = offset;
1377 req->size = nbytes;
1378 req->int2 = flags;
1379
1380 REQ_SEND;
1381}
1382
1383void
1384aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
1385 PPCODE:
1386{
1387 int fd = s_fileno_croak (fh, 0);
1388 dREQ;
1389
1390 req->type = EIO_FALLOCATE;
1391 req->sv1 = newSVsv (fh);
1392 req->int1 = fd;
1393 req->int2 = mode;
1394 req->offs = offset;
1395 req->size = len;
1396
1397 REQ_SEND;
1398}
1399
1400void
1401aio_close (SV *fh, SV *callback = &PL_sv_undef)
1402 PPCODE:
1403{
1404 static int close_fd = -1; /* dummy fd to close fds via dup2 */
1405 int fd = s_fileno_croak (fh, 0);
1406 dREQ;
1407
1408 if (expect_false (close_fd < 0))
1409 {
1410 int pipefd [2];
1411
1412 if (
1413#ifdef _WIN32
1414 _pipe (pipefd, 1, _O_BINARY) < 0
1415#else
1416 pipe (pipefd) < 0
1417 || fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
1418#endif
1419 || close (pipefd [1]) < 0
429 cur--; 1420 )
1421 abort (); /*D*/
1422
1423 close_fd = pipefd [0];
430 } 1424 }
431 1425
432 while (started > nthreads) 1426 req->type = EIO_DUP2;
1427 req->int1 = close_fd;
1428 req->sv2 = newSVsv (fh);
1429 req->int2 = fd;
1430
1431 REQ_SEND;
1432}
1433
1434void
1435aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1436 PPCODE:
1437{
1438 int fd = s_fileno_croak (fh, 0);
1439 dREQ;
1440
1441 req->type = EIO_SEEK;
1442 req->sv1 = newSVsv (fh);
1443 req->int1 = fd;
1444 req->offs = SvVAL64 (offset);
1445 req->int2 = whence;
1446
1447 REQ_SEND;
1448}
1449
1450void
1451aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1452 ALIAS:
1453 aio_read = EIO_READ
1454 aio_write = EIO_WRITE
1455 PPCODE:
1456{
1457 STRLEN svlen;
1458 int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1459 char *svptr = SvPVbyte (data, svlen);
1460 UV len = SvUV (length);
1461
1462 if (dataoffset < 0)
1463 dataoffset += svlen;
1464
1465 if (dataoffset < 0 || dataoffset > svlen)
1466 croak ("dataoffset outside of data scalar");
1467
1468 if (ix == EIO_WRITE)
1469 {
1470 /* write: check length and adjust. */
1471 if (!SvOK (length) || len + dataoffset > svlen)
1472 len = svlen - dataoffset;
1473 }
1474 else
1475 {
1476 /* read: check type and grow scalar as necessary */
1477 if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1478 svptr = sv_grow (data, len + dataoffset + 1);
1479 else if (SvCUR (data) < len + dataoffset)
1480 croak ("length + dataoffset outside of scalar, and cannot grow");
1481 }
1482
1483 {
1484 dREQ;
1485
1486 req->type = ix;
1487 req->sv1 = newSVsv (fh);
1488 req->int1 = fd;
1489 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1490 req->size = len;
1491 req->sv2 = SvREFCNT_inc (data);
1492 req->ptr2 = (char *)svptr + dataoffset;
1493 req->stroffset = dataoffset;
1494
1495 if (!SvREADONLY (data))
1496 {
1497 SvREADONLY_on (data);
1498 req->flags |= FLAG_SV2_RO_OFF;
1499 }
1500
1501 REQ_SEND;
1502 }
1503}
1504
1505void
1506aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1507 ALIAS:
1508 aio_ioctl = EIO_IOCTL
1509 aio_fcntl = EIO_FCNTL
1510 PPCODE:
1511{
1512 int fd = s_fileno_croak (fh, 0);
1513 char *svptr;
1514
1515 if (SvPOK (arg) || !SvNIOK (arg))
1516 {
1517 STRLEN svlen;
1518 /* perl uses IOCPARM_LEN for fcntl, so we do, too */
1519#ifdef IOCPARM_LEN
1520 STRLEN need = IOCPARM_LEN (request);
1521#else
1522 STRLEN need = 256;
1523#endif
1524
1525 if (svlen < need)
1526 svptr = SvGROW (arg, need);
1527 }
1528 else
1529 svptr = (char *)SvIV (arg);
1530
1531 {
1532 dREQ;
1533
1534 req->type = ix;
1535 req->sv1 = newSVsv (fh);
1536 req->int1 = fd;
1537 req->int2 = (long)request;
1538 req->sv2 = SvREFCNT_inc (arg);
1539 req->ptr2 = svptr;
1540
1541 REQ_SEND;
1542 }
1543}
1544
1545void
1546aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1547 ALIAS:
1548 aio_readlink = EIO_READLINK
1549 aio_realpath = EIO_REALPATH
1550 PPCODE:
1551{
1552 dREQ;
1553
1554 req->type = ix;
1555 req_set_path1 (req, pathname);
1556
1557 REQ_SEND;
1558}
1559
1560void
1561aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
1562 PPCODE:
1563{
1564 int ifd = s_fileno_croak (in_fh , 0);
1565 int ofd = s_fileno_croak (out_fh, 1);
1566 dREQ;
1567
1568 req->type = EIO_SENDFILE;
1569 req->sv1 = newSVsv (out_fh);
1570 req->int1 = ofd;
1571 req->sv2 = newSVsv (in_fh);
1572 req->int2 = ifd;
1573 req->offs = in_offset;
1574 req->size = length;
1575
1576 REQ_SEND;
1577}
1578
1579void
1580aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1581 PPCODE:
1582{
1583 int fd = s_fileno_croak (fh, 0);
1584 dREQ;
1585
1586 req->type = EIO_READAHEAD;
1587 req->sv1 = newSVsv (fh);
1588 req->int1 = fd;
1589 req->offs = offset;
1590 req->size = length;
1591
1592 REQ_SEND;
1593}
1594
1595void
1596aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1597 ALIAS:
1598 aio_stat = EIO_STAT
1599 aio_lstat = EIO_LSTAT
1600 aio_statvfs = EIO_STATVFS
1601 PPCODE:
1602{
1603 dREQ;
1604
1605 req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1606
1607 REQ_SEND;
1608}
1609
1610UV
1611major (UV dev)
1612 ALIAS:
1613 minor = 1
1614 CODE:
1615 RETVAL = ix ? minor (dev) : major (dev);
1616 OUTPUT:
1617 RETVAL
1618
1619UV
1620makedev (UV maj, UV min)
1621 CODE:
1622 RETVAL = makedev (maj, min);
1623 OUTPUT:
1624 RETVAL
1625
1626void
1627aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
1628 PPCODE:
1629{
1630 dREQ;
1631
1632 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1633 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1634 req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
1635
1636 REQ_SEND;
1637}
1638
1639void
1640aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
1641 PPCODE:
1642{
1643 dREQ;
1644
1645 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1646 req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
1647
1648 REQ_SEND;
1649}
1650
1651void
1652aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
1653 PPCODE:
1654{
1655 dREQ;
1656
1657 req->int2 = mode;
1658 req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
1659
1660 REQ_SEND;
1661}
1662
1663void
1664aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
1665 PPCODE:
1666{
1667 dREQ;
1668
1669 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1670 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1671 req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
1672
1673 REQ_SEND;
1674}
1675
1676void
1677aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
1678 PPCODE:
1679{
1680 dREQ;
1681
1682 req->type = EIO_READDIR;
1683 req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
1684
1685 if (flags & EIO_READDIR_DENTS)
1686 req->int1 |= EIO_READDIR_CUSTOM2;
1687
1688 req_set_path1 (req, pathname);
1689
1690 REQ_SEND;
1691}
1692
1693void
1694aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
1695 PPCODE:
1696{
1697 dREQ;
1698
1699 req->type = EIO_MKDIR;
1700 req->int2 = mode;
1701 req_set_path1 (req, pathname);
1702
1703 REQ_SEND;
1704}
1705
1706void
1707aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1708 ALIAS:
1709 aio_unlink = EIO_UNLINK
1710 aio_rmdir = EIO_RMDIR
1711 aio_readdir = EIO_READDIR
1712 PPCODE:
1713{
1714 dREQ;
1715
1716 req->type = ix;
1717 req_set_path1 (req, pathname);
1718
1719 REQ_SEND;
1720}
1721
1722void
1723aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1724 ALIAS:
1725 aio_link = EIO_LINK
1726 aio_symlink = EIO_SYMLINK
1727 aio_rename = EIO_RENAME
1728 PPCODE:
1729{
1730 eio_wd wd2 = 0;
1731 dREQ;
1732
1733 req->type = ix;
1734 req_set_path1 (req, oldpath);
1735 req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1736 req->int3 = (long)wd2;
1737
1738 REQ_SEND;
1739}
1740
1741void
1742aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
1743 PPCODE:
1744{
1745 eio_wd wd2 = 0;
1746 dREQ;
1747
1748 req->type = EIO_RENAME;
1749 req_set_path1 (req, oldpath);
1750 req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1751 req->int2 = flags;
1752 req->int3 = (long)wd2;
1753
1754 REQ_SEND;
1755}
1756
1757void
1758aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1759 PPCODE:
1760{
1761 dREQ;
1762
1763 req->type = EIO_MKNOD;
1764 req->int2 = (mode_t)mode;
1765 req->offs = dev;
1766 req_set_path1 (req, pathname);
1767
1768 REQ_SEND;
1769}
1770
1771void
1772aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
1773 ALIAS:
1774 aio_mtouch = EIO_MTOUCH
1775 aio_msync = EIO_MSYNC
1776 PPCODE:
1777{
1778 STRLEN svlen;
1779 char *svptr = SvPVbyte (data, svlen);
1780 UV len = SvUV (length);
1781
1782 if (flags < 0)
1783 flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
1784
1785 if (offset < 0)
1786 offset += svlen;
1787
1788 if (offset < 0 || offset > svlen)
1789 croak ("offset outside of scalar");
1790
1791 if (!SvOK (length) || len + offset > svlen)
1792 len = svlen - offset;
1793
1794 {
1795 dREQ;
1796
1797 req->type = ix;
1798 req->sv2 = SvREFCNT_inc (data);
1799 req->ptr2 = (char *)svptr + offset;
1800 req->size = len;
1801 req->int1 = flags;
1802
1803 REQ_SEND;
1804 }
1805}
1806
1807void
1808aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
1809 PPCODE:
1810{
1811 STRLEN svlen;
1812 char *svptr = SvPVbyte (data, svlen);
1813 UV len = SvUV (length);
1814
1815 if (offset < 0)
1816 offset += svlen;
1817
1818 if (offset < 0 || offset > svlen)
1819 croak ("offset outside of scalar");
1820
1821 if (!SvOK (length) || len + offset > svlen)
1822 len = svlen - offset;
1823
1824 {
1825 dREQ;
1826
1827 req->type = EIO_MLOCK;
1828 req->sv2 = SvREFCNT_inc (data);
1829 req->ptr2 = (char *)svptr + offset;
1830 req->size = len;
1831
1832 REQ_SEND;
1833 }
1834}
1835
1836void
1837aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
1838 PPCODE:
1839{
1840 dREQ;
1841
1842 req->type = EIO_MLOCKALL;
1843 req->int1 = flags;
1844
1845 REQ_SEND;
1846}
1847
1848void
1849aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
1850 PPCODE:
1851{
1852 int fd = s_fileno_croak (fh, 0);
1853 dREQ;
1854
1855 req->type = EIO_CUSTOM;
1856 req->sv1 = newSVsv (fh);
1857 req->int1 = fd;
1858
1859 req->feed = fiemap;
1860#if HAVE_FIEMAP
1861 /* keep our fingers crossed that the next two types are 64 bit */
1862 req->offs = start;
1863 req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
1864 req->int2 = flags;
1865 req->int3 = SvOK (count) ? SvIV (count) : -1;
1866#endif
1867
1868 REQ_SEND;
1869}
1870
1871void
1872aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
1873 PPCODE:
1874{
1875 char *svptr = 0;
1876
1877 sv_clear_foreign (data);
1878
1879 if (length) /* known length, directly read into scalar */
1880 {
1881 if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1882 svptr = sv_grow (data, length + 1);
1883 else if (SvCUR (data) < length)
1884 croak ("length outside of scalar, and cannot grow");
1885 else
1886 svptr = SvPVbyte_nolen (data);
1887 }
1888
1889 {
1890 dREQ;
1891
1892 req->type = EIO_SLURP;
1893 req_set_path1 (req, pathname);
1894 req->offs = offset;
1895 req->size = length;
1896 req->sv2 = SvREFCNT_inc (data);
1897 req->ptr2 = svptr;
1898
1899 if (!SvREADONLY (data))
1900 {
1901 SvREADONLY_on (data);
1902 req->flags |= FLAG_SV2_RO_OFF;
1903 }
1904
1905 REQ_SEND;
1906 }
1907}
1908
1909void
1910aio_busy (double delay, SV *callback = &PL_sv_undef)
1911 PPCODE:
1912{
1913 dREQ;
1914
1915 req->type = EIO_BUSY;
1916 req->nv1 = delay < 0. ? 0. : delay;
1917
1918 REQ_SEND;
1919}
1920
1921void
1922aio_group (SV *callback = &PL_sv_undef)
1923 PPCODE:
1924{
1925 dREQ;
1926
1927 req->type = EIO_GROUP;
1928
1929 PUTBACK;
1930 req_submit (req);
1931 SPAGAIN;
1932
1933 XPUSHs (req_sv (req, aio_grp_stash));
1934}
1935
1936void
1937aio_nop (SV *callback = &PL_sv_undef)
1938 ALIAS:
1939 aio_nop = EIO_NOP
1940 aio_sync = EIO_SYNC
1941 PPCODE:
1942{
1943 dREQ;
1944
1945 req->type = ix;
1946
1947 REQ_SEND;
1948}
1949
1950int
1951aioreq_pri (int pri = NO_INIT)
1952 CODE:
1953 RETVAL = next_pri;
1954 if (items > 0)
1955 {
1956 if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1957 if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1958 next_pri = pri;
1959 }
1960 OUTPUT:
1961 RETVAL
1962
1963void
1964aioreq_nice (int nice = 0)
1965 CODE:
1966 nice = next_pri - nice;
1967 if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1968 if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1969 next_pri = nice;
1970
1971void
1972flush ()
1973 CODE:
1974 while (eio_nreqs ())
433 { 1975 {
434 poll_wait (); 1976 poll_wait ();
435 poll_cb (); 1977 poll_cb ();
436 } 1978 }
437}
438 1979
439int 1980int
440max_outstanding(nreqs) 1981poll ()
441 int nreqs
442 PROTOTYPE: $
443 CODE:
444 RETVAL = max_outstanding;
445 max_outstanding = nreqs;
446
447void
448aio_open(pathname,flags,mode,callback=&PL_sv_undef)
449 SV * pathname
450 int flags
451 int mode
452 SV * callback
453 PROTOTYPE: $$$;$
454 CODE: 1982 CODE:
455{
456 aio_req req;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462
463 req->type = REQ_OPEN;
464 req->data = newSVsv (pathname);
465 req->dataptr = SvPV_nolen (req->data);
466 req->fd = flags;
467 req->mode = mode;
468 req->callback = SvREFCNT_inc (callback);
469
470 send_req (req);
471}
472
473void
474aio_close(fh,callback=&PL_sv_undef)
475 SV * fh
476 SV * callback
477 PROTOTYPE: $;$
478 ALIAS:
479 aio_close = REQ_CLOSE
480 aio_fsync = REQ_FSYNC
481 aio_fdatasync = REQ_FDATASYNC
482 CODE:
483{
484 aio_req req;
485
486 Newz (0, req, 1, aio_cb);
487
488 if (!req)
489 croak ("out of memory during aio_req allocation");
490
491 req->type = ix;
492 req->fh = newSVsv (fh);
493 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494 req->callback = SvREFCNT_inc (callback);
495
496 send_req (req);
497}
498
499void
500aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501 SV * fh
502 UV offset
503 IV length
504 SV * data
505 IV dataoffset
506 SV * callback
507 ALIAS:
508 aio_read = REQ_READ
509 aio_write = REQ_WRITE
510 PROTOTYPE: $$$$$;$
511 CODE:
512{
513 aio_req req;
514 STRLEN svlen;
515 char *svptr = SvPV (data, svlen);
516
517 SvUPGRADE (data, SVt_PV);
518 SvPOK_on (data);
519
520 if (dataoffset < 0)
521 dataoffset += svlen;
522
523 if (dataoffset < 0 || dataoffset > svlen)
524 croak ("data offset outside of string");
525
526 if (ix == REQ_WRITE)
527 {
528 /* write: check length and adjust. */
529 if (length < 0 || length + dataoffset > svlen)
530 length = svlen - dataoffset;
531 }
532 else
533 {
534 /* read: grow scalar as necessary */
535 svptr = SvGROW (data, length + dataoffset);
536 }
537
538 if (length < 0)
539 croak ("length must not be negative");
540
541 Newz (0, req, 1, aio_cb);
542
543 if (!req)
544 croak ("out of memory during aio_req allocation");
545
546 req->type = ix;
547 req->fh = newSVsv (fh);
548 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549 : IoOFP (sv_2io (fh)));
550 req->offset = offset;
551 req->length = length;
552 req->data = SvREFCNT_inc (data);
553 req->dataptr = (char *)svptr + dataoffset;
554 req->callback = SvREFCNT_inc (callback);
555
556 send_req (req);
557}
558
559void
560aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561 SV * fh
562 UV offset
563 IV length
564 SV * callback
565 PROTOTYPE: $$$;$
566 CODE:
567{
568 aio_req req;
569
570 if (length < 0)
571 croak ("length must not be negative");
572
573 Newz (0, req, 1, aio_cb);
574
575 if (!req)
576 croak ("out of memory during aio_req allocation");
577
578 req->type = REQ_READAHEAD;
579 req->fh = newSVsv (fh);
580 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581 req->offset = offset;
582 req->length = length;
583 req->callback = SvREFCNT_inc (callback);
584
585 send_req (req);
586}
587
588void
589aio_stat(fh_or_path,callback=&PL_sv_undef)
590 SV * fh_or_path
591 SV * callback
592 ALIAS:
593 aio_stat = REQ_STAT
594 aio_lstat = REQ_LSTAT
595 CODE:
596{
597 aio_req req;
598
599 Newz (0, req, 1, aio_cb);
600
601 if (!req)
602 croak ("out of memory during aio_req allocation");
603
604 New (0, req->statdata, 1, Stat_t);
605
606 if (!req->statdata)
607 croak ("out of memory during aio_req->statdata allocation");
608
609 if (SvPOK (fh_or_path))
610 {
611 req->type = ix;
612 req->data = newSVsv (fh_or_path);
613 req->dataptr = SvPV_nolen (req->data);
614 }
615 else
616 {
617 req->type = REQ_FSTAT;
618 req->fh = newSVsv (fh_or_path);
619 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620 }
621
622 req->callback = SvREFCNT_inc (callback);
623
624 send_req (req);
625}
626
627void
628aio_unlink(pathname,callback=&PL_sv_undef)
629 SV * pathname
630 SV * callback
631 CODE:
632{
633 aio_req req;
634
635 Newz (0, req, 1, aio_cb);
636
637 if (!req)
638 croak ("out of memory during aio_req allocation");
639
640 req->type = REQ_UNLINK;
641 req->data = newSVsv (pathname);
642 req->dataptr = SvPV_nolen (req->data);
643 req->callback = SvREFCNT_inc (callback);
644
645 send_req (req);
646}
647
648void
649flush()
650 PROTOTYPE:
651 CODE:
652 while (nreqs)
653 {
654 poll_wait (); 1983 poll_wait ();
655 poll_cb (); 1984 RETVAL = poll_cb ();
656 }
657
658void
659poll()
660 PROTOTYPE:
661 CODE:
662 if (nreqs)
663 {
664 poll_wait ();
665 poll_cb ();
666 }
667
668int
669poll_fileno()
670 PROTOTYPE:
671 CODE:
672 RETVAL = respipe [0];
673 OUTPUT: 1985 OUTPUT:
674 RETVAL 1986 RETVAL
675 1987
676int 1988int
1989poll_fileno ()
1990 CODE:
1991 RETVAL = s_epipe_fd (&respipe);
1992 OUTPUT:
1993 RETVAL
1994
1995int
677poll_cb(...) 1996poll_cb (...)
678 PROTOTYPE: 1997 PROTOTYPE:
679 CODE: 1998 CODE:
680 RETVAL = poll_cb (); 1999 RETVAL = poll_cb ();
681 OUTPUT: 2000 OUTPUT:
682 RETVAL 2001 RETVAL
683 2002
684void 2003void
685poll_wait() 2004poll_wait ()
686 PROTOTYPE:
687 CODE: 2005 CODE:
688 if (nreqs)
689 poll_wait (); 2006 poll_wait ();
690 2007
691int 2008int
692nreqs() 2009nreqs ()
693 PROTOTYPE:
694 CODE: 2010 CODE:
695 RETVAL = nreqs; 2011 RETVAL = eio_nreqs ();
696 OUTPUT: 2012 OUTPUT:
697 RETVAL 2013 RETVAL
698 2014
2015int
2016nready ()
2017 CODE:
2018 RETVAL = eio_nready ();
2019 OUTPUT:
2020 RETVAL
2021
2022int
2023npending ()
2024 CODE:
2025 RETVAL = eio_npending ();
2026 OUTPUT:
2027 RETVAL
2028
2029int
2030nthreads ()
2031 CODE:
2032 RETVAL = eio_nthreads ();
2033 OUTPUT:
2034 RETVAL
2035
2036int
2037fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
2038 CODE:
2039 RETVAL = posix_fadvise (fh, offset, length, advice);
2040 OUTPUT:
2041 RETVAL
2042
2043IV
2044sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
2045 CODE:
2046 RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
2047 OUTPUT:
2048 RETVAL
2049
2050void
2051mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
2052 PPCODE:
2053 sv_clear_foreign (scalar);
2054{
2055 int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
2056 void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
2057 if (addr == (void *)-1)
2058 XSRETURN_NO;
2059
2060 sv_set_foreign (scalar, &mmap_vtbl, addr, length);
2061
2062 if (!(prot & PROT_WRITE))
2063 SvREADONLY_on (scalar);
2064
2065 XSRETURN_YES;
2066}
2067
2068void
2069munmap (SV *scalar)
2070 CODE:
2071 sv_clear_foreign (scalar);
2072
2073SV *
2074mremap (SV *scalar, STRLEN new_length, int flags = 0, IV new_address = 0)
2075 CODE:
2076{
2077 MAGIC *mg = mg_findext (scalar, FOREIGN_MAGIC, &mmap_vtbl);
2078 void *new;
2079
2080 if (!mg || SvPVX (scalar) != mg->mg_ptr)
2081 croak ("IO::AIO::mremap: scalar not mapped by IO::AIO::mmap or improperly modified");
2082
2083 new = mremap (mg->mg_ptr, (size_t)mg->mg_obj, new_length, flags, (void *)new_address);
2084
2085 RETVAL = &PL_sv_no;
2086
2087 if (new != (void *)-1)
2088 {
2089 RETVAL = new == (void *)mg->mg_ptr
2090 ? newSVpvn ("0 but true", 10)
2091 : &PL_sv_yes;
2092
2093 mg->mg_ptr = (char *)new;
2094 mg->mg_obj = (SV *)new_length;
2095
2096 SvPVX (scalar) = mg->mg_ptr;
2097 SvCUR_set (scalar, new_length);
2098 }
2099}
2100 OUTPUT:
2101 RETVAL
2102
2103int
2104madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
2105 ALIAS:
2106 mprotect = 1
2107 CODE:
2108{
2109 STRLEN svlen;
2110 void *addr = SvPVbyte (scalar, svlen);
2111 STRLEN len = SvUV (length);
2112
2113 if (offset < 0)
2114 offset += svlen;
2115
2116 if (offset < 0 || offset > svlen)
2117 croak ("offset outside of scalar");
2118
2119 if (!SvOK (length) || len + offset > svlen)
2120 len = svlen - offset;
2121
2122 addr = (void *)(((intptr_t)addr) + offset);
2123 eio_page_align (&addr, &len);
2124
2125 switch (ix)
2126 {
2127 case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
2128 case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
2129 }
2130}
2131 OUTPUT:
2132 RETVAL
2133
2134int
2135munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
2136 CODE:
2137{
2138 STRLEN svlen;
2139 void *addr = SvPVbyte (scalar, svlen);
2140 size_t len = SvUV (length);
2141
2142 if (offset < 0)
2143 offset += svlen;
2144
2145 if (offset < 0 || offset > svlen)
2146 croak ("offset outside of scalar");
2147
2148 if (!SvOK (length) || len + offset > svlen)
2149 len = svlen - offset;
2150
2151 addr = (void *)(((intptr_t)addr) + offset);
2152 eio_page_align (&addr, &len);
2153#if _POSIX_MEMLOCK_RANGE
2154 RETVAL = munlock (addr, len);
2155#else
2156 RETVAL = EIO_ENOSYS ();
2157#endif
2158}
2159 OUTPUT:
2160 RETVAL
2161
2162int
2163munlockall ()
2164 CODE:
2165#if _POSIX_MEMLOCK
2166 munlockall ();
2167#else
2168 RETVAL = EIO_ENOSYS ();
2169#endif
2170 OUTPUT:
2171 RETVAL
2172
2173int
2174splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
2175 CODE:
2176{
2177#if HAVE_LINUX_SPLICE
2178 loff_t off_in_, off_out_;
2179 RETVAL = splice (
2180 rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
2181 wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
2182 length, flags
2183 );
2184#else
2185 RETVAL = EIO_ENOSYS ();
2186#endif
2187}
2188 OUTPUT:
2189 RETVAL
2190
2191int
2192tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
2193 CODE:
2194#if HAVE_LINUX_SPLICE
2195 RETVAL = tee (rfh, wfh, length, flags);
2196#else
2197 RETVAL = EIO_ENOSYS ();
2198#endif
2199 OUTPUT:
2200 RETVAL
2201
2202int
2203pipesize (aio_rfd rfh, int new_size = -1)
2204 PROTOTYPE: $;$
2205 CODE:
2206#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
2207 if (new_size >= 0)
2208 RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
2209 else
2210 RETVAL = fcntl (rfh, F_GETPIPE_SZ);
2211#else
2212 errno = ENOSYS;
2213 RETVAL = -1;
2214#endif
2215 OUTPUT:
2216 RETVAL
2217
2218void
2219pipe2 (int flags = 0)
2220 PROTOTYPE: ;$
2221 PPCODE:
2222{
2223 int fd[2];
2224 int res;
2225
2226 if (flags)
2227#if HAVE_PIPE2
2228 res = pipe2 (fd, flags);
2229#else
2230 res = (errno = ENOSYS, -1);
2231#endif
2232 else
2233 res = pipe (fd);
2234
2235 if (!res)
2236 {
2237 EXTEND (SP, 2);
2238 PUSHs (newmortalFH (fd[0], O_RDONLY));
2239 PUSHs (newmortalFH (fd[1], O_WRONLY));
2240 }
2241}
2242
2243void
2244eventfd (unsigned int initval = 0, int flags = 0)
2245 PPCODE:
2246{
2247 int fd;
2248#if HAVE_EVENTFD
2249 fd = eventfd (initval, flags);
2250#else
2251 fd = (errno = ENOSYS, -1);
2252#endif
2253
2254 XPUSHs (newmortalFH (fd, O_RDWR));
2255}
2256
2257void
2258timerfd_create (int clockid, int flags = 0)
2259 PPCODE:
2260{
2261 int fd;
2262#if HAVE_TIMERFD
2263 fd = timerfd_create (clockid, flags);
2264#else
2265 fd = (errno = ENOSYS, -1);
2266#endif
2267
2268 XPUSHs (newmortalFH (fd, O_RDWR));
2269}
2270
2271void
2272timerfd_settime (SV *fh, int flags, NV interval, NV value)
2273 PPCODE:
2274{
2275 int fd = s_fileno_croak (fh, 0);
2276#if HAVE_TIMERFD
2277 int res;
2278 struct itimerspec its, ots;
2279
2280 ts_set (&its.it_interval, interval);
2281 ts_set (&its.it_value , value);
2282 res = timerfd_settime (fd, flags, &its, &ots);
2283
2284 if (!res)
2285 {
2286 EXTEND (SP, 2);
2287 PUSHs (newSVnv (ts_get (&ots.it_interval)));
2288 PUSHs (newSVnv (ts_get (&ots.it_value)));
2289 }
2290#else
2291 errno = ENOSYS;
2292#endif
2293}
2294
2295void
2296timerfd_gettime (SV *fh)
2297 PPCODE:
2298{
2299 int fd = s_fileno_croak (fh, 0);
2300#if HAVE_TIMERFD
2301 int res;
2302 struct itimerspec ots;
2303 res = timerfd_gettime (fd, &ots);
2304
2305 if (!res)
2306 {
2307 EXTEND (SP, 2);
2308 PUSHs (newSVnv (ts_get (&ots.it_interval)));
2309 PUSHs (newSVnv (ts_get (&ots.it_value)));
2310 }
2311#else
2312 errno = ENOSYS;
2313#endif
2314}
2315
2316UV
2317get_fdlimit ()
2318 CODE:
2319#if HAVE_RLIMITS
2320 struct rlimit rl;
2321 if (0 == getrlimit (RLIMIT_NOFILE, &rl))
2322 XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
2323#endif
2324 XSRETURN_UNDEF;
2325 OUTPUT:
2326 RETVAL
2327
2328void
2329min_fdlimit (UV limit = 0x7fffffffU)
2330 CODE:
2331{
2332#if HAVE_RLIMITS
2333 struct rlimit rl;
2334 rlim_t orig_rlim_max;
2335 UV bit;
2336
2337 if (0 != getrlimit (RLIMIT_NOFILE, &rl))
2338 goto fail;
2339
2340 if (rl.rlim_cur == RLIM_INFINITY)
2341 XSRETURN_YES;
2342
2343 orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
2344
2345 if (rl.rlim_cur < limit)
2346 {
2347 rl.rlim_cur = limit;
2348
2349 if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
2350 rl.rlim_max = rl.rlim_cur;
2351 }
2352
2353 if (0 == setrlimit (RLIMIT_NOFILE, &rl))
2354 XSRETURN_YES;
2355
2356 if (errno == EPERM)
2357 {
2358 /* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
2359 /* our limit overflows a system-wide limit */
2360 /* try an adaptive algorithm, but do not lower the hardlimit */
2361 rl.rlim_max = 0;
2362 for (bit = 0x40000000U; bit; bit >>= 1)
2363 {
2364 rl.rlim_max |= bit;
2365 rl.rlim_cur = rl.rlim_max;
2366
2367 /* nevr decrease the hard limit */
2368 if (rl.rlim_max < orig_rlim_max)
2369 break;
2370
2371 if (0 != setrlimit (RLIMIT_NOFILE, &rl))
2372 rl.rlim_max &= ~bit; /* too high, remove bit again */
2373 }
2374
2375 /* now, raise the soft limit to the max permitted */
2376 if (0 == getrlimit (RLIMIT_NOFILE, &rl))
2377 {
2378 rl.rlim_cur = rl.rlim_max;
2379 if (0 == setrlimit (RLIMIT_NOFILE, &rl))
2380 errno = EPERM;
2381 }
2382 }
2383#endif
2384 fail:
2385 XSRETURN_UNDEF;
2386}
2387
2388void _on_next_submit (SV *cb)
2389 CODE:
2390 SvREFCNT_dec (on_next_submit);
2391 on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
2392
2393PROTOTYPES: DISABLE
2394
2395MODULE = IO::AIO PACKAGE = IO::AIO::WD
2396
2397BOOT:
2398{
2399 newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
2400 newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
2401}
2402
2403void
2404DESTROY (SV *self)
2405 CODE:
2406{
2407 aio_wd wd = SvAIO_WD (self);
2408#if HAVE_AT
2409 {
2410 SV *callback = &PL_sv_undef;
2411 dREQ; /* clobbers next_pri :/ */
2412 next_pri = req->pri; /* restore next_pri */
2413 req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
2414 req->type = EIO_WD_CLOSE;
2415 req->wd = wd;
2416 REQ_SEND;
2417 }
2418#else
2419 eio_wd_close_sync (wd);
2420#endif
2421}
2422
2423MODULE = IO::AIO PACKAGE = IO::AIO::REQ
2424
2425void
2426cancel (aio_req_ornot req)
2427 CODE:
2428 eio_cancel (req);
2429
2430void
2431cb (aio_req_ornot req, SV *callback = NO_INIT)
2432 PPCODE:
2433{
2434 if (GIMME_V != G_VOID)
2435 XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
2436
2437 if (items > 1)
2438 {
2439 SV *cb_cv = get_cb (callback);
2440
2441 SvREFCNT_dec (req->callback);
2442 req->callback = SvREFCNT_inc (cb_cv);
2443 }
2444}
2445
2446MODULE = IO::AIO PACKAGE = IO::AIO::GRP
2447
2448void
2449add (aio_req grp, ...)
2450 PPCODE:
2451{
2452 int i;
2453
2454 if (grp->int1 == 2)
2455 croak ("cannot add requests to IO::AIO::GRP after the group finished");
2456
2457 for (i = 1; i < items; ++i )
2458 {
2459 aio_req req;
2460
2461 if (GIMME_V != G_VOID)
2462 XPUSHs (sv_2mortal (newSVsv (ST (i))));
2463
2464 req = SvAIO_REQ (ST (i));
2465
2466 if (req)
2467 eio_grp_add (grp, req);
2468 }
2469}
2470
2471void
2472cancel_subs (aio_req_ornot req)
2473 CODE:
2474 req_cancel_subs (req);
2475
2476void
2477result (aio_req grp, ...)
2478 CODE:
2479{
2480 int i;
2481 AV *av;
2482
2483 grp->errorno = errno;
2484
2485 av = newAV ();
2486 av_extend (av, items - 1);
2487
2488 for (i = 1; i < items; ++i )
2489 av_push (av, newSVsv (ST (i)));
2490
2491 SvREFCNT_dec (grp->sv1);
2492 grp->sv1 = (SV *)av;
2493}
2494
2495void
2496errno (aio_req grp, int errorno = errno)
2497 CODE:
2498 grp->errorno = errorno;
2499
2500void
2501limit (aio_req grp, int limit)
2502 CODE:
2503 eio_grp_limit (grp, limit);
2504
2505void
2506feed (aio_req grp, SV *callback = &PL_sv_undef)
2507 CODE:
2508{
2509 SvREFCNT_dec (grp->sv2);
2510 grp->sv2 = newSVsv (callback);
2511 grp->feed = aio_grp_feed;
2512
2513 if (grp->int2 <= 0)
2514 grp->int2 = 2;
2515
2516 eio_grp_limit (grp, grp->int2);
2517}
2518

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