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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.114 by root, Sat Apr 26 12:00:23 2008 UTC vs.
Revision 1.115 by root, Sat May 10 18:06:41 2008 UTC

1	#include "xthread.h"	1	#include "libeio/xthread.h"
2		2
3	#include <errno.h>	3	#include <errno.h>
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
…		…
15	#include <fcntl.h>	15	#include <fcntl.h>
16	#include <sched.h>	16	#include <sched.h>
17		17
18	#ifdef _WIN32	18	#ifdef _WIN32
19		19
20	# define SIGIO 0	20	# define EIO_STRUCT_DIRENT Direntry_t
21	typedef Direntry_t X_DIRENT;
22	#undef malloc	21	# undef malloc
23	#undef free	22	# undef free
24		23
25	// perl overrides all those nice win32 functions	24	// perl overrides all those nice win32 functions
26	# undef open	25	# undef open
27	# undef read	26	# undef read
28	# undef write	27	# undef write
…		…
54	# define closedir(fd) (errno = ENOSYS, -1)	53	# define closedir(fd) (errno = ENOSYS, -1)
55	# define mkdir(a,b) mkdir (a)	54	# define mkdir(a,b) mkdir (a)
56		55
57	#else	56	#else
58		57
59	# include "autoconf/config.h"
60	# include <sys/time.h>	58	# include <sys/time.h>
61	# include <sys/select.h>	59	# include <sys/select.h>
62	# include <unistd.h>	60	# include <unistd.h>
63	# include <utime.h>	61	# include <utime.h>
64	# include <signal.h>	62	# include <signal.h>
65	typedef struct dirent X_DIRENT;	63	# define EIO_STRUCT_DIRENT struct dirent
66		64
67	#endif	65	#endif
68		66
69	#if HAVE_SENDFILE	67	#define EIO_STRUCT_STAT Stat_t
70	# if __linux
71	# include <sys/sendfile.h>
72	# elif __freebsd
73	# include <sys/socket.h>
74	# include <sys/uio.h>
75	# elif __hpux
76	# include <sys/socket.h>
77	# elif __solaris /* not yet */
78	# include <sys/sendfile.h>
79	# else
80	# error sendfile support requested but not available
81	# endif
82	#endif
83
84	/* number of seconds after which idle threads exit */
85	#define IDLE_TIMEOUT 10
86
87	/* used for struct dirent, AIX doesn't provide it */
88	#ifndef NAME_MAX
89	# define NAME_MAX 4096
90	#endif
91
92	/* buffer size for various temporary buffers */
93	#define AIO_BUFSIZE 65536
94		68
95	/* use NV for 32 bit perls as it allows larger offsets */	69	/* use NV for 32 bit perls as it allows larger offsets */
96	#if IVSIZE >= 8	70	#if IVSIZE >= 8
97	# define SvVAL64 SvIV	71	# define SvVAL64 SvIV
98	#else	72	#else
99	# define SvVAL64 SvNV	73	# define SvVAL64 SvNV
100	#endif	74	#endif
101		75
102	static HV *stash;	76	static HV *stash;
103
104	#define dBUF \
105	char *aio_buf; \
106	X_LOCK (wrklock); \
107	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
108	X_UNLOCK (wrklock); \
109	if (!aio_buf) \
110	return -1;
111
112	typedef SV SV8; /* byte-sv, used for argument-checking */	77	typedef SV SV8; /* byte-sv, used for argument-checking */
113
114	enum {
115	REQ_QUIT,
116	REQ_OPEN, REQ_CLOSE,
117	REQ_READ, REQ_WRITE,
118	REQ_READAHEAD, REQ_SENDFILE,
119	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
120	REQ_TRUNCATE, REQ_FTRUNCATE,
121	REQ_UTIME, REQ_FUTIME,
122	REQ_CHMOD, REQ_FCHMOD,
123	REQ_CHOWN, REQ_FCHOWN,
124	REQ_SYNC, REQ_FSYNC, REQ_FDATASYNC,
125	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
126	REQ_MKNOD, REQ_READDIR,
127	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
128	REQ_GROUP, REQ_NOP,
129	REQ_BUSY,
130	};
131		78
132	#define AIO_REQ_KLASS "IO::AIO::REQ"	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
133	#define AIO_GRP_KLASS "IO::AIO::GRP"	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
134		81
135	typedef struct aio_cb	82	#define EIO_COMMON \
136	{
137	struct aio_cb *volatile next;
138
139	SV *callback;	83	SV *callback; \
140	SV *sv1, *sv2;	84	SV *sv1, *sv2; \
141	void *ptr1, *ptr2;
142	off_t offs;
143	size_t size;
144	ssize_t result;
145	double nv1, nv2;
146
147	STRLEN stroffset;	85	STRLEN stroffset; \
148	int type;	86	SV *self
149	int int1, int2, int3;
150	int errorno;
151	mode_t mode; /* open */
152		87
153	unsigned char flags;	88	#include "libeio/eio.h"
154	unsigned char pri;
155		89
156	SV *self; /* the perl counterpart of this request, if any */	90	static int req_invoke (eio_req *req);
157	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	91	#define EIO_FINISH(req) req_invoke (req)
158	} aio_cb;	92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
159		96
160	enum {	97	enum {
161	FLAG_CANCELLED = 0x01, /* request was cancelled */
162	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
163	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
164	};	99	};
165		100
		101	#include "libeio/eio.c"
		102
166	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
167	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
168		105
169	enum {	106	static unsigned int max_outstanding = 0x7fffffff;
170	PRI_MIN = -4,
171	PRI_MAX = 4,
172		107
173	DEFAULT_PRI = 0,
174	PRI_BIAS = -PRI_MIN,
175	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
176	};
177
178	#define AIO_TICKS ((1000000 + 1023) >> 10)
179
180	static unsigned int max_poll_time = 0;
181	static unsigned int max_poll_reqs = 0;
182
183	/* calculcate time difference in ~1/AIO_TICKS of a second */
184	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
185	{
186	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
187	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
188	}
189
190	static thread_t main_tid;
191	static int main_sig;
192	static int block_sig_level;
193
194	void block_sig (void)
195	{
196	sigset_t ss;
197
198	if (block_sig_level++)
199	return;
200
201	if (!main_sig)
202	return;
203
204	sigemptyset (&ss);
205	sigaddset (&ss, main_sig);
206	pthread_sigmask (SIG_BLOCK, &ss, 0);
207	}
208
209	void unblock_sig (void)
210	{
211	sigset_t ss;
212
213	if (--block_sig_level)
214	return;
215
216	if (!main_sig)
217	return;
218
219	sigemptyset (&ss);
220	sigaddset (&ss, main_sig);
221	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
222	}
223
224	static int next_pri = DEFAULT_PRI + PRI_BIAS;	108	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
225		109
226	static unsigned int started, idle, wanted;
227
228	/* worker threads management */
229	static mutex_t wrklock = X_MUTEX_INIT;
230
231	typedef struct worker {
232	/* locked by wrklock */
233	struct worker *prev, *next;
234
235	thread_t tid;
236
237	/* locked by reslock, reqlock or wrklock */
238	aio_req req; /* currently processed request */
239	void *dbuf;
240	DIR *dirp;
241	} worker;
242
243	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
244
245	static void worker_clear (worker *wrk)
246	{
247	if (wrk->dirp)
248	{
249	closedir (wrk->dirp);
250	wrk->dirp = 0;
251	}
252
253	if (wrk->dbuf)
254	{
255	free (wrk->dbuf);
256	wrk->dbuf = 0;
257	}
258	}
259
260	static void worker_free (worker *wrk)
261	{
262	wrk->next->prev = wrk->prev;
263	wrk->prev->next = wrk->next;
264
265	free (wrk);
266	}
267
268	static volatile unsigned int nreqs, nready, npending;
269	static volatile unsigned int max_idle = 4;
270	static volatile unsigned int max_outstanding = 0xffffffff;
271	static int respipe_osf [2], respipe [2] = { -1, -1 };	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
272		111
273	static mutex_t reslock = X_MUTEX_INIT;
274	static mutex_t reqlock = X_MUTEX_INIT;
275	static cond_t reqwait = X_COND_INIT;
276
277	#if WORDACCESS_UNSAFE
278
279	static unsigned int get_nready (void)
280	{
281	unsigned int retval;
282
283	X_LOCK (reqlock);
284	retval = nready;
285	X_UNLOCK (reqlock);
286
287	return retval;
288	}
289
290	static unsigned int get_npending (void)
291	{
292	unsigned int retval;
293
294	X_LOCK (reslock);
295	retval = npending;
296	X_UNLOCK (reslock);
297
298	return retval;
299	}
300
301	static unsigned int get_nthreads (void)
302	{
303	unsigned int retval;
304
305	X_LOCK (wrklock);
306	retval = started;
307	X_UNLOCK (wrklock);
308
309	return retval;
310	}
311
312	#else
313
314	# define get_nready() nready
315	# define get_npending() npending
316	# define get_nthreads() started
317
318	#endif
319
320	/*
321	* a somewhat faster data structure might be nice, but
322	* with 8 priorities this actually needs <20 insns
323	* per shift, the most expensive operation.
324	*/
325	typedef struct {
326	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
327	int size;
328	} reqq;
329
330	static reqq req_queue;
331	static reqq res_queue;
332
333	int reqq_push (reqq *q, aio_req req)
334	{
335	int pri = req->pri;
336	req->next = 0;
337
338	if (q->qe[pri])
339	{
340	q->qe[pri]->next = req;
341	q->qe[pri] = req;
342	}
343	else
344	q->qe[pri] = q->qs[pri] = req;
345
346	return q->size++;
347	}
348
349	aio_req reqq_shift (reqq *q)
350	{
351	int pri;
352
353	if (!q->size)
354	return 0;
355
356	--q->size;
357
358	for (pri = NUM_PRI; pri--; )
359	{
360	aio_req req = q->qs[pri];
361
362	if (req)
363	{
364	if (!(q->qs[pri] = req->next))
365	q->qe[pri] = 0;
366
367	return req;
368	}
369	}
370
371	abort ();
372	}
373
374	static int poll_cb (void);
375	static int req_invoke (aio_req req);
376	static void req_destroy (aio_req req);	112	static void req_destroy (aio_req req);
377	static void req_cancel (aio_req req);	113	static void req_cancel (aio_req req);
		114
		115	static void want_poll (void)
		116	{
		117	/* write a dummy byte to the pipe so fh becomes ready */
		118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		119	}
		120
		121	static void done_poll (void)
		122	{
		123	/* read any signals sent by the worker threads */
		124	char buf [4];
		125	while (respipe_read (respipe [0], buf, 4) == 4)
		126	;
		127	}
378		128
379	/* must be called at most once */	129	/* must be called at most once */
380	static SV *req_sv (aio_req req, const char *klass)	130	static SV *req_sv (aio_req req, const char *klass)
381	{	131	{
382	if (!req->self)	132	if (!req->self)
…		…
400	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
401	}	151	}
402		152
403	static void aio_grp_feed (aio_req grp)	153	static void aio_grp_feed (aio_req grp)
404	{	154	{
405	block_sig ();	155	if (grp->sv2 && SvOK (grp->sv2))
406
407	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
408	{	156	{
409	int old_len = grp->size;
410
411	if (grp->sv2 && SvOK (grp->sv2))
412	{
413	dSP;	157	dSP;
414		158
415	ENTER;	159	ENTER;
416	SAVETMPS;	160	SAVETMPS;
417	PUSHMARK (SP);	161	PUSHMARK (SP);
418	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
419	PUTBACK;	163	PUTBACK;
420	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
421	SPAGAIN;	165	SPAGAIN;
422	FREETMPS;	166	FREETMPS;
423	LEAVE;	167	LEAVE;
424	}
425
426	/* stop if no progress has been made */
427	if (old_len == grp->size)
428	{
429	SvREFCNT_dec (grp->sv2);
430	grp->sv2 = 0;
431	break;
432	}
433	}	168	}
434
435	unblock_sig ();
436	}	169	}
437		170
438	static void aio_grp_dec (aio_req grp)
439	{
440	--grp->size;
441
442	/* call feeder, if applicable */
443	aio_grp_feed (grp);
444
445	/* finish, if done */
446	if (!grp->size && grp->int1)
447	{
448	block_sig ();
449
450	if (!req_invoke (grp))
451	{
452	req_destroy (grp);
453	unblock_sig ();
454	croak (0);
455	}
456
457	req_destroy (grp);
458	unblock_sig ();
459	}
460	}
461
462	static int req_invoke (aio_req req)	171	static int req_invoke (eio_req *req)
463	{	172	{
464	dSP;	173	dSP;
465		174
466	if (req->flags & FLAG_SV2_RO_OFF)	175	if (req->flags & FLAG_SV2_RO_OFF)
467	SvREADONLY_off (req->sv2);	176	SvREADONLY_off (req->sv2);
468		177
469	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	178	if (!EIO_CANCELLED (req) && SvOK (req->callback))
470	{	179	{
471	ENTER;	180	ENTER;
472	SAVETMPS;	181	SAVETMPS;
473	PUSHMARK (SP);	182	PUSHMARK (SP);
474	EXTEND (SP, 1);	183	EXTEND (SP, 1);
475		184
476	switch (req->type)	185	switch (req->type)
477	{	186	{
478	case REQ_READDIR:	187	case EIO_READDIR:
479	{	188	{
480	SV *rv = &PL_sv_undef;	189	SV *rv = &PL_sv_undef;
481		190
482	if (req->result >= 0)	191	if (req->result >= 0)
483	{	192	{
…		…
500		209
501	PUSHs (rv);	210	PUSHs (rv);
502	}	211	}
503	break;	212	break;
504		213
505	case REQ_OPEN:	214	case EIO_OPEN:
506	{	215	{
507	/* convert fd to fh */	216	/* convert fd to fh */
508	SV *fh = &PL_sv_undef;	217	SV *fh = &PL_sv_undef;
509		218
510	if (req->result >= 0)	219	if (req->result >= 0)
…		…
531		240
532	PUSHs (fh);	241	PUSHs (fh);
533	}	242	}
534	break;	243	break;
535		244
536	case REQ_GROUP:	245	case EIO_GROUP:
537	req->int1 = 2; /* mark group as finished */	246	req->int1 = 2; /* mark group as finished */
538		247
539	if (req->sv1)	248	if (req->sv1)
540	{	249	{
541	int i;	250	int i;
…		…
545	for (i = 0; i <= AvFILL (av); ++i)	254	for (i = 0; i <= AvFILL (av); ++i)
546	PUSHs (*av_fetch (av, i, 0));	255	PUSHs (*av_fetch (av, i, 0));
547	}	256	}
548	break;	257	break;
549		258
550	case REQ_NOP:	259	case EIO_NOP:
551	case REQ_BUSY:	260	case EIO_BUSY:
552	break;	261	break;
553		262
554	case REQ_READLINK:	263	case EIO_READLINK:
555	if (req->result > 0)	264	if (req->result > 0)
556	{	265	{
557	SvCUR_set (req->sv2, req->result);	266	SvCUR_set (req->sv2, req->result);
558	*SvEND (req->sv2) = 0;	267	*SvEND (req->sv2) = 0;
559	PUSHs (req->sv2);	268	PUSHs (req->sv2);
560	}	269	}
561	break;	270	break;
562		271
563	case REQ_STAT:	272	case EIO_STAT:
564	case REQ_LSTAT:	273	case EIO_LSTAT:
565	case REQ_FSTAT:	274	case EIO_FSTAT:
566	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	275	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
567	PL_laststatval = req->result;	276	PL_laststatval = req->result;
568	PL_statcache = *(Stat_t *)(req->ptr2);	277	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
569	PUSHs (sv_2mortal (newSViv (req->result)));	278	PUSHs (sv_2mortal (newSViv (req->result)));
570	break;	279	break;
571		280
572	case REQ_READ:	281	case EIO_READ:
573	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));	282	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
574	*SvEND (req->sv2) = 0;	283	*SvEND (req->sv2) = 0;
575	PUSHs (sv_2mortal (newSViv (req->result)));	284	PUSHs (sv_2mortal (newSViv (req->result)));
576	break;	285	break;
577		286
		287	case EIO_DUP2:
		288	if (req->result > 0)
		289	req->result = 0;
		290	/* FALLTHROUGH */
		291
578	default:	292	default:
579	PUSHs (sv_2mortal (newSViv (req->result)));	293	PUSHs (sv_2mortal (newSViv (req->result)));
580	break;	294	break;
581	}	295	}
582		296
…		…
590	LEAVE;	304	LEAVE;
591		305
592	PUTBACK;	306	PUTBACK;
593	}	307	}
594		308
595	if (req->grp)
596	{
597	aio_req grp = req->grp;
598
599	/* unlink request */
600	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
601	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
602
603	if (grp->grp_first == req)
604	grp->grp_first = req->grp_next;
605
606	aio_grp_dec (grp);
607	}
608
609	return !SvTRUE (ERRSV);	309	return !!SvTRUE (ERRSV);
610	}	310	}
611		311
612	static void req_destroy (aio_req req)	312	static void req_destroy (aio_req req)
613	{	313	{
614	if (req->self)	314	if (req->self)
…		…
619		319
620	SvREFCNT_dec (req->sv1);	320	SvREFCNT_dec (req->sv1);
621	SvREFCNT_dec (req->sv2);	321	SvREFCNT_dec (req->sv2);
622	SvREFCNT_dec (req->callback);	322	SvREFCNT_dec (req->callback);
623		323
624	if (req->flags & FLAG_PTR2_FREE)
625	free (req->ptr2);
626
627	Safefree (req);	324	Safefree (req);
628	}	325	}
629		326
630	static void req_cancel_subs (aio_req grp)	327	static void req_cancel_subs (aio_req grp)
631	{	328	{
632	aio_req sub;	329	aio_req sub;
633		330
634	if (grp->type != REQ_GROUP)	331	if (grp->type != EIO_GROUP)
635	return;	332	return;
636		333
637	SvREFCNT_dec (grp->sv2);	334	SvREFCNT_dec (grp->sv2);
638	grp->sv2 = 0;	335	grp->sv2 = 0;
639		336
640	for (sub = grp->grp_first; sub; sub = sub->grp_next)	337	eio_grp_cancel (grp);
641	req_cancel (sub);
642	}
643
644	static void req_cancel (aio_req req)
645	{
646	req->flags |= FLAG_CANCELLED;
647
648	req_cancel_subs (req);
649	}	338	}
650		339
651	#ifdef USE_SOCKETS_AS_HANDLES	340	#ifdef USE_SOCKETS_AS_HANDLES
652	# define TO_SOCKET(x) (win32_get_osfhandle (x))	341	# define TO_SOCKET(x) (win32_get_osfhandle (x))
653	#else	342	#else
…		…
690		379
691	respipe_osf [0] = TO_SOCKET (respipe [0]);	380	respipe_osf [0] = TO_SOCKET (respipe [0]);
692	respipe_osf [1] = TO_SOCKET (respipe [1]);	381	respipe_osf [1] = TO_SOCKET (respipe [1]);
693	}	382	}
694		383
695	X_THREAD_PROC (aio_proc);
696
697	static void start_thread (void)
698	{
699	worker *wrk = calloc (1, sizeof (worker));
700
701	if (!wrk)
702	croak ("unable to allocate worker thread data");
703
704	X_LOCK (wrklock);
705
706	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
707	{
708	wrk->prev = &wrk_first;
709	wrk->next = wrk_first.next;
710	wrk_first.next->prev = wrk;
711	wrk_first.next = wrk;
712	++started;
713	}
714	else
715	free (wrk);
716
717	X_UNLOCK (wrklock);
718	}
719
720	static void maybe_start_thread (void)
721	{
722	if (get_nthreads () >= wanted)
723	return;
724
725	/* todo: maybe use idle here, but might be less exact */
726	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
727	return;
728
729	start_thread ();
730	}
731
732	static void req_send (aio_req req)
733	{
734	block_sig ();
735
736	++nreqs;
737
738	X_LOCK (reqlock);
739	++nready;
740	reqq_push (&req_queue, req);
741	X_COND_SIGNAL (reqwait);
742	X_UNLOCK (reqlock);
743
744	unblock_sig ();
745
746	maybe_start_thread ();
747	}
748
749	static void end_thread (void)
750	{
751	aio_req req;
752
753	Newz (0, req, 1, aio_cb);
754
755	req->type = REQ_QUIT;
756	req->pri = PRI_MAX + PRI_BIAS;
757
758	X_LOCK (reqlock);
759	reqq_push (&req_queue, req);
760	X_COND_SIGNAL (reqwait);
761	X_UNLOCK (reqlock);
762
763	X_LOCK (wrklock);
764	--started;
765	X_UNLOCK (wrklock);
766	}
767
768	static void set_max_idle (int nthreads)
769	{
770	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
771	max_idle = nthreads <= 0 ? 1 : nthreads;
772	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
773	}
774
775	static void min_parallel (int nthreads)
776	{
777	if (wanted < nthreads)
778	wanted = nthreads;
779	}
780
781	static void max_parallel (int nthreads)
782	{
783	if (wanted > nthreads)
784	wanted = nthreads;
785
786	while (started > wanted)
787	end_thread ();
788	}
789
790	static void poll_wait (void)	384	static void poll_wait (void)
791	{	385	{
792	fd_set rfd;	386	fd_set rfd;
793		387
794	while (nreqs)	388	while (eio_nreqs ())
795	{	389	{
796	int size;	390	int size;
797	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	391
		392	X_LOCK (reslock);
798	size = res_queue.size;	393	size = res_queue.size;
799	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	394	X_UNLOCK (reslock);
800		395
801	if (size)	396	if (size)
802	return;	397	return;
803		398
804	maybe_start_thread ();	399	maybe_start_thread ();
…		…
810	}	405	}
811	}	406	}
812		407
813	static int poll_cb (void)	408	static int poll_cb (void)
814	{	409	{
815	dSP;	410	int res = eio_poll ();
816	int count = 0;
817	int maxreqs = max_poll_reqs;
818	int do_croak = 0;
819	struct timeval tv_start, tv_now;
820	aio_req req;
821		411
822	if (max_poll_time)	412	if (res > 0)
823	gettimeofday (&tv_start, 0);	413	croak (0);
824
825	block_sig ();
826
827	for (;;)
828	{
829	for (;;)
830	{
831	maybe_start_thread ();
832
833	X_LOCK (reslock);
834	req = reqq_shift (&res_queue);
835
836	if (req)
837	{
838	--npending;
839
840	if (!res_queue.size)
841	{
842	/* read any signals sent by the worker threads */
843	char buf [4];
844	while (respipe_read (respipe [0], buf, 4) == 4)
845	;
846	}
847	}
848
849	X_UNLOCK (reslock);
850
851	if (!req)
852	break;
853
854	--nreqs;
855
856	if (req->type == REQ_GROUP && req->size)
857	{
858	req->int1 = 1; /* mark request as delayed */
859	continue;
860	}
861	else
862	{
863	if (!req_invoke (req))
864	{
865	req_destroy (req);
866	unblock_sig ();
867	croak (0);
868	}
869
870	count++;
871	}
872
873	req_destroy (req);
874
875	if (maxreqs && !--maxreqs)
876	break;
877
878	if (max_poll_time)
879	{
880	gettimeofday (&tv_now, 0);
881
882	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
883	break;
884	}
885	}
886
887	if (nreqs <= max_outstanding)
888	break;
889
890	poll_wait ();
891
892	++maxreqs;
893	}
894
895	unblock_sig ();
896	return count;
897	}
898
899	/*****************************************************************************/
900	/* work around various missing functions */
901
902	#if !HAVE_PREADWRITE
903	# define pread aio_pread
904	# define pwrite aio_pwrite
905
906	/*
907	* make our pread/pwrite safe against themselves, but not against
908	* normal read/write by using a mutex. slows down execution a lot,
909	* but that's your problem, not mine.
910	*/
911	static mutex_t preadwritelock = X_MUTEX_INIT;
912
913	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
914	{
915	ssize_t res;
916	off_t ooffset;
917
918	X_LOCK (preadwritelock);
919	ooffset = lseek (fd, 0, SEEK_CUR);
920	lseek (fd, offset, SEEK_SET);
921	res = read (fd, buf, count);
922	lseek (fd, ooffset, SEEK_SET);
923	X_UNLOCK (preadwritelock);
924		414
925	return res;	415	return res;
926	}
927
928	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
929	{
930	ssize_t res;
931	off_t ooffset;
932
933	X_LOCK (preadwritelock);
934	ooffset = lseek (fd, 0, SEEK_CUR);
935	lseek (fd, offset, SEEK_SET);
936	res = write (fd, buf, count);
937	lseek (fd, offset, SEEK_SET);
938	X_UNLOCK (preadwritelock);
939
940	return res;
941	}
942	#endif
943
944	#ifndef HAVE_FUTIMES
945
946	# define utimes(path,times) aio_utimes (path, times)
947	# define futimes(fd,times) aio_futimes (fd, times)
948
949	int aio_utimes (const char *filename, const struct timeval times[2])
950	{
951	if (times)
952	{
953	struct utimbuf buf;
954
955	buf.actime = times[0].tv_sec;
956	buf.modtime = times[1].tv_sec;
957
958	return utime (filename, &buf);
959	}
960	else
961	return utime (filename, 0);
962	}
963
964	int aio_futimes (int fd, const struct timeval tv[2])
965	{
966	errno = ENOSYS;
967	return -1;
968	}
969
970	#endif
971
972	#if !HAVE_FDATASYNC
973	# define fdatasync fsync
974	#endif
975
976	#if !HAVE_READAHEAD
977	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
978
979	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
980	{
981	size_t todo = count;
982	dBUF;
983
984	while (todo > 0)
985	{
986	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
987
988	pread (fd, aio_buf, len, offset);
989	offset += len;
990	todo -= len;
991	}
992
993	errno = 0;
994	return count;
995	}
996
997	#endif
998
999	#if !HAVE_READDIR_R
1000	# define readdir_r aio_readdir_r
1001
1002	static mutex_t readdirlock = X_MUTEX_INIT;
1003
1004	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
1005	{
1006	X_DIRENT *e;
1007	int errorno;
1008
1009	X_LOCK (readdirlock);
1010
1011	e = readdir (dirp);
1012	errorno = errno;
1013
1014	if (e)
1015	{
1016	*res = ent;
1017	strcpy (ent->d_name, e->d_name);
1018	}
1019	else
1020	*res = 0;
1021
1022	X_UNLOCK (readdirlock);
1023
1024	errno = errorno;
1025	return e ? 0 : -1;
1026	}
1027	#endif
1028
1029	/* sendfile always needs emulation */
1030	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
1031	{
1032	ssize_t res;
1033
1034	if (!count)
1035	return 0;
1036
1037	#if HAVE_SENDFILE
1038	# if __linux
1039	res = sendfile (ofd, ifd, &offset, count);
1040
1041	# elif __freebsd
1042	/*
1043	* Of course, the freebsd sendfile is a dire hack with no thoughts
1044	* wasted on making it similar to other I/O functions.
1045	*/
1046	{
1047	off_t sbytes;
1048	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
1049
1050	if (res < 0 && sbytes)
1051	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
1052	res = sbytes;
1053	}
1054
1055	# elif __hpux
1056	res = sendfile (ofd, ifd, offset, count, 0, 0);
1057
1058	# elif __solaris
1059	{
1060	struct sendfilevec vec;
1061	size_t sbytes;
1062
1063	vec.sfv_fd = ifd;
1064	vec.sfv_flag = 0;
1065	vec.sfv_off = offset;
1066	vec.sfv_len = count;
1067
1068	res = sendfilev (ofd, &vec, 1, &sbytes);
1069
1070	if (res < 0 && sbytes)
1071	res = sbytes;
1072	}
1073
1074	# endif
1075	#else
1076	res = -1;
1077	errno = ENOSYS;
1078	#endif
1079
1080	if (res < 0
1081	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1082	#if __solaris
1083	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
1084	#endif
1085	)
1086	)
1087	{
1088	/* emulate sendfile. this is a major pain in the ass */
1089	dBUF;
1090
1091	res = 0;
1092
1093	while (count)
1094	{
1095	ssize_t cnt;
1096
1097	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
1098
1099	if (cnt <= 0)
1100	{
1101	if (cnt && !res) res = -1;
1102	break;
1103	}
1104
1105	cnt = write (ofd, aio_buf, cnt);
1106
1107	if (cnt <= 0)
1108	{
1109	if (cnt && !res) res = -1;
1110	break;
1111	}
1112
1113	offset += cnt;
1114	res += cnt;
1115	count -= cnt;
1116	}
1117	}
1118
1119	return res;
1120	}
1121
1122	/* read a full directory */
1123	static void scandir_ (aio_req req, worker *self)
1124	{
1125	DIR *dirp;
1126	union
1127	{
1128	X_DIRENT d;
1129	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
1130	} *u;
1131	X_DIRENT *entp;
1132	char *name, *names;
1133	int memlen = 4096;
1134	int memofs = 0;
1135	int res = 0;
1136
1137	X_LOCK (wrklock);
1138	self->dirp = dirp = opendir (req->ptr1);
1139	self->dbuf = u = malloc (sizeof (*u));
1140	req->flags |= FLAG_PTR2_FREE;
1141	req->ptr2 = names = malloc (memlen);
1142	X_UNLOCK (wrklock);
1143
1144	if (dirp && u && names)
1145	for (;;)
1146	{
1147	errno = 0;
1148	readdir_r (dirp, &u->d, &entp);
1149
1150	if (!entp)
1151	break;
1152
1153	name = entp->d_name;
1154
1155	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1156	{
1157	int len = strlen (name) + 1;
1158
1159	res++;
1160
1161	while (memofs + len > memlen)
1162	{
1163	memlen *= 2;
1164	X_LOCK (wrklock);
1165	req->ptr2 = names = realloc (names, memlen);
1166	X_UNLOCK (wrklock);
1167
1168	if (!names)
1169	break;
1170	}
1171
1172	memcpy (names + memofs, name, len);
1173	memofs += len;
1174	}
1175	}
1176
1177	if (errno)
1178	res = -1;
1179
1180	req->result = res;
1181	}
1182
1183	static int
1184	aio_close (int fd)
1185	{
1186	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
1187
1188	X_LOCK (wrklock);
1189
1190	if (close_pipe < 0)
1191	{
1192	int pipefd [2];
1193
1194	if (pipe (pipefd) < 0
1195	|| close (pipefd [1]) < 0
1196	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
1197	{
1198	X_UNLOCK (wrklock);
1199	return -1;
1200	}
1201
1202	close_pipe = pipefd [0];
1203	}
1204
1205	X_UNLOCK (wrklock);
1206
1207	return dup2 (close_pipe, fd) < 0 ? -1 : 0;
1208	}
1209
1210	/*****************************************************************************/
1211
1212	X_THREAD_PROC (aio_proc)
1213	{
1214	aio_req req;
1215	struct timespec ts;
1216	worker *self = (worker *)thr_arg;
1217
1218	/* try to distribute timeouts somewhat randomly */
1219	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1220
1221	for (;;)
1222	{
1223	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1224
1225	X_LOCK (reqlock);
1226
1227	for (;;)
1228	{
1229	self->req = req = reqq_shift (&req_queue);
1230
1231	if (req)
1232	break;
1233
1234	++idle;
1235
1236	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
1237	== ETIMEDOUT)
1238	{
1239	if (idle > max_idle)
1240	{
1241	--idle;
1242	X_UNLOCK (reqlock);
1243	X_LOCK (wrklock);
1244	--started;
1245	X_UNLOCK (wrklock);
1246	goto quit;
1247	}
1248
1249	/* we are allowed to idle, so do so without any timeout */
1250	X_COND_WAIT (reqwait, reqlock);
1251	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1252	}
1253
1254	--idle;
1255	}
1256
1257	--nready;
1258
1259	X_UNLOCK (reqlock);
1260
1261	errno = 0; /* strictly unnecessary */
1262
1263	if (!(req->flags & FLAG_CANCELLED))
1264	switch (req->type)
1265	{
1266	case REQ_READ: req->result = req->offs >= 0
1267	? pread (req->int1, req->ptr1, req->size, req->offs)
1268	: read (req->int1, req->ptr1, req->size); break;
1269	case REQ_WRITE: req->result = req->offs >= 0
1270	? pwrite (req->int1, req->ptr1, req->size, req->offs)
1271	: write (req->int1, req->ptr1, req->size); break;
1272
1273	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1274	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1275
1276	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1277	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1278	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1279
1280	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1281	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1282	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
1283	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
1284	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
1285	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
1286
1287	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1288	case REQ_CLOSE: req->result = aio_close (req->int1); break;
1289	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1290	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1291	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1292	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1293	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1294	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1295	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1296	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1297
1298	case REQ_SYNC: req->result = 0; sync (); break;
1299	case REQ_FSYNC: req->result = fsync (req->int1); break;
1300	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1301
1302	case REQ_READDIR: scandir_ (req, self); break;
1303
1304	case REQ_BUSY:
1305	#ifdef _WIN32
1306	Sleep (req->nv1 * 1000.);
1307	#else
1308	{
1309	struct timeval tv;
1310
1311	tv.tv_sec = req->nv1;
1312	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
1313
1314	req->result = select (0, 0, 0, 0, &tv);
1315	}
1316	#endif
1317	break;
1318
1319	case REQ_UTIME:
1320	case REQ_FUTIME:
1321	{
1322	struct timeval tv[2];
1323	struct timeval *times;
1324
1325	if (req->nv1 != -1. || req->nv2 != -1.)
1326	{
1327	tv[0].tv_sec = req->nv1;
1328	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
1329	tv[1].tv_sec = req->nv2;
1330	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
1331
1332	times = tv;
1333	}
1334	else
1335	times = 0;
1336
1337
1338	req->result = req->type == REQ_FUTIME
1339	? futimes (req->int1, times)
1340	: utimes (req->ptr1, times);
1341	}
1342
1343	case REQ_GROUP:
1344	case REQ_NOP:
1345	break;
1346
1347	case REQ_QUIT:
1348	goto quit;
1349
1350	default:
1351	req->result = -1;
1352	break;
1353	}
1354
1355	req->errorno = errno;
1356
1357	X_LOCK (reslock);
1358
1359	++npending;
1360
1361	if (!reqq_push (&res_queue, req))
1362	{
1363	/* write a dummy byte to the pipe so fh becomes ready */
1364	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
1365
1366	/* optionally signal the main thread asynchronously */
1367	if (main_sig)
1368	pthread_kill (main_tid, main_sig);
1369	}
1370
1371	self->req = 0;
1372	worker_clear (self);
1373
1374	X_UNLOCK (reslock);
1375	}
1376
1377	quit:
1378	X_LOCK (wrklock);
1379	worker_free (self);
1380	X_UNLOCK (wrklock);
1381
1382	return 0;
1383	}
1384
1385	/*****************************************************************************/
1386
1387	static void atfork_prepare (void)
1388	{
1389	X_LOCK (wrklock);
1390	X_LOCK (reqlock);
1391	X_LOCK (reslock);
1392	#if !HAVE_PREADWRITE
1393	X_LOCK (preadwritelock);
1394	#endif
1395	#if !HAVE_READDIR_R
1396	X_LOCK (readdirlock);
1397	#endif
1398	}
1399
1400	static void atfork_parent (void)
1401	{
1402	#if !HAVE_READDIR_R
1403	X_UNLOCK (readdirlock);
1404	#endif
1405	#if !HAVE_PREADWRITE
1406	X_UNLOCK (preadwritelock);
1407	#endif
1408	X_UNLOCK (reslock);
1409	X_UNLOCK (reqlock);
1410	X_UNLOCK (wrklock);
1411	}
1412
1413	static void atfork_child (void)
1414	{
1415	aio_req prv;
1416
1417	while (prv = reqq_shift (&req_queue))
1418	req_destroy (prv);
1419
1420	while (prv = reqq_shift (&res_queue))
1421	req_destroy (prv);
1422
1423	while (wrk_first.next != &wrk_first)
1424	{
1425	worker *wrk = wrk_first.next;
1426
1427	if (wrk->req)
1428	req_destroy (wrk->req);
1429
1430	worker_clear (wrk);
1431	worker_free (wrk);
1432	}
1433
1434	started = 0;
1435	idle = 0;
1436	nreqs = 0;
1437	nready = 0;
1438	npending = 0;
1439
1440	create_respipe ();
1441
1442	atfork_parent ();
1443	}	416	}
1444		417
1445	#define dREQ \	418	#define dREQ \
1446	aio_req req; \	419	aio_req req; \
1447	int req_pri = next_pri; \	420	int req_pri = next_pri; \
1448	next_pri = DEFAULT_PRI + PRI_BIAS; \	421	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1449	\	422	\
1450	if (SvOK (callback) && !SvROK (callback)) \	423	if (SvOK (callback) && !SvROK (callback)) \
1451	croak ("callback must be undef or of reference type"); \	424	croak ("callback must be undef or of reference type"); \
1452	\	425	\
1453	Newz (0, req, 1, aio_cb); \	426	Newz (0, req, 1, eio_req); \
1454	if (!req) \	427	if (!req) \
1455	croak ("out of memory during aio_req allocation"); \	428	croak ("out of memory during eio_req allocation"); \
1456	\	429	\
1457	req->callback = newSVsv (callback); \	430	req->callback = newSVsv (callback); \
1458	req->pri = req_pri	431	req->pri = req_pri
1459		432
1460	#define REQ_SEND \	433	#define REQ_SEND \
1461	req_send (req); \	434	eio_submit (req); \
1462	\	435	\
1463	if (GIMME_V != G_VOID) \	436	if (GIMME_V != G_VOID) \
1464	XPUSHs (req_sv (req, AIO_REQ_KLASS));	437	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1465		438
1466	MODULE = IO::AIO PACKAGE = IO::AIO	439	MODULE = IO::AIO PACKAGE = IO::AIO
…		…
1485	X_MUTEX_CHECK (readdirlock);	458	X_MUTEX_CHECK (readdirlock);
1486		459
1487	X_COND_CHECK (reqwait);	460	X_COND_CHECK (reqwait);
1488	#else	461	#else
1489	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	462	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1490	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1491	#endif	463	#endif
1492		464
1493	create_respipe ();	465	create_respipe ();
1494		466
1495	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);	467	if (eio_init (want_poll, done_poll) < 0)
		468	croak ("IO::AIO: unable to initialise eio library");
1496	}	469	}
1497		470
1498	void	471	void
1499	max_poll_reqs (int nreqs)	472	max_poll_reqs (int nreqs)
1500	PROTOTYPE: $	473	PROTOTYPE: $
1501	CODE:	474	CODE:
1502	max_poll_reqs = nreqs;	475	eio_set_max_poll_reqs (nreqs);
1503		476
1504	void	477	void
1505	max_poll_time (double nseconds)	478	max_poll_time (double nseconds)
1506	PROTOTYPE: $	479	PROTOTYPE: $
1507	CODE:	480	CODE:
1508	max_poll_time = nseconds * AIO_TICKS;	481	eio_set_max_poll_time (nseconds);
1509		482
1510	void	483	void
1511	min_parallel (int nthreads)	484	min_parallel (int nthreads)
1512	PROTOTYPE: $	485	PROTOTYPE: $
		486	CODE:
		487	eio_set_min_parallel (nthreads);
1513		488
1514	void	489	void
1515	max_parallel (int nthreads)	490	max_parallel (int nthreads)
1516	PROTOTYPE: $	491	PROTOTYPE: $
		492	CODE:
		493	eio_set_max_parallel (nthreads);
1517		494
1518	void	495	void
1519	max_idle (int nthreads)	496	max_idle (int nthreads)
1520	PROTOTYPE: $	497	PROTOTYPE: $
1521	CODE:	498	CODE:
1522	set_max_idle (nthreads);	499	eio_set_max_idle (nthreads);
1523		500
1524	int	501	void
1525	max_outstanding (int maxreqs)	502	max_outstanding (int maxreqs)
1526	PROTOTYPE: $	503	PROTOTYPE: $
1527	CODE:	504	CODE:
1528	RETVAL = max_outstanding;
1529	max_outstanding = maxreqs;	505	max_outstanding = maxreqs;
1530	OUTPUT:
1531	RETVAL
1532		506
1533	void	507	void
1534	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)	508	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1535	PROTOTYPE: $$$;$	509	PROTOTYPE: $$$;$
1536	PPCODE:	510	PPCODE:
1537	{	511	{
1538	dREQ;	512	dREQ;
1539		513
1540	req->type = REQ_OPEN;	514	req->type = EIO_OPEN;
1541	req->sv1 = newSVsv (pathname);	515	req->sv1 = newSVsv (pathname);
1542	req->ptr1 = SvPVbyte_nolen (req->sv1);	516	req->ptr1 = SvPVbyte_nolen (req->sv1);
1543	req->int1 = flags;	517	req->int1 = flags;
1544	req->mode = mode;	518	req->int2 = mode;
1545		519
1546	REQ_SEND;	520	REQ_SEND;
1547	}	521	}
1548		522
1549	void	523	void
1550	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)	524	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1551	PROTOTYPE: $;$	525	PROTOTYPE: $;$
1552	ALIAS:	526	ALIAS:
1553	aio_fsync = REQ_FSYNC	527	aio_fsync = EIO_FSYNC
1554	aio_fdatasync = REQ_FDATASYNC	528	aio_fdatasync = EIO_FDATASYNC
1555	PPCODE:	529	PPCODE:
1556	{	530	{
1557	dREQ;	531	dREQ;
1558		532
1559	req->type = ix;	533	req->type = ix;
…		…
1566	void	540	void
1567	aio_close (SV *fh, SV *callback=&PL_sv_undef)	541	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1568	PROTOTYPE: $;$	542	PROTOTYPE: $;$
1569	PPCODE:	543	PPCODE:
1570	{	544	{
		545	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
1571	dREQ;	546	dREQ;
1572		547
		548	if (close_pipe < 0)
		549	{
		550	int pipefd [2];
		551
		552	if (pipe (pipefd) < 0
		553	|| close (pipefd [1]) < 0
		554	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		555	abort (); /*D*/
		556
		557	close_pipe = pipefd [0];
		558	}
		559
1573	req->type = REQ_CLOSE;	560	req->type = EIO_DUP2;
		561	req->int1 = close_pipe;
1574	req->sv1 = newSVsv (fh);	562	req->sv2 = newSVsv (fh);
1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	563	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1576		564
1577	REQ_SEND (req);	565	REQ_SEND (req);
1578	}	566	}
1579		567
1580	void	568	void
1581	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)	569	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1582	ALIAS:	570	ALIAS:
1583	aio_read = REQ_READ	571	aio_read = EIO_READ
1584	aio_write = REQ_WRITE	572	aio_write = EIO_WRITE
1585	PROTOTYPE: $$$$$;$	573	PROTOTYPE: $$$$$;$
1586	PPCODE:	574	PPCODE:
1587	{	575	{
1588	STRLEN svlen;	576	STRLEN svlen;
1589	char *svptr = SvPVbyte (data, svlen);	577	char *svptr = SvPVbyte (data, svlen);
…		…
1596	dataoffset += svlen;	584	dataoffset += svlen;
1597		585
1598	if (dataoffset < 0 || dataoffset > svlen)	586	if (dataoffset < 0 || dataoffset > svlen)
1599	croak ("dataoffset outside of data scalar");	587	croak ("dataoffset outside of data scalar");
1600		588
1601	if (ix == REQ_WRITE)	589	if (ix == EIO_WRITE)
1602	{	590	{
1603	/* write: check length and adjust. */	591	/* write: check length and adjust. */
1604	if (!SvOK (length) || len + dataoffset > svlen)	592	if (!SvOK (length) || len + dataoffset > svlen)
1605	len = svlen - dataoffset;	593	len = svlen - dataoffset;
1606	}	594	}
…		…
1616	{	604	{
1617	dREQ;	605	dREQ;
1618		606
1619	req->type = ix;	607	req->type = ix;
1620	req->sv1 = newSVsv (fh);	608	req->sv1 = newSVsv (fh);
1621	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	609	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1622	: IoOFP (sv_2io (fh)));	610	: IoOFP (sv_2io (fh)));
1623	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;	611	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1624	req->size = len;	612	req->size = len;
1625	req->sv2 = SvREFCNT_inc (data);	613	req->sv2 = SvREFCNT_inc (data);
1626	req->ptr1 = (char *)svptr + dataoffset;	614	req->ptr2 = (char *)svptr + dataoffset;
1627	req->stroffset = dataoffset;	615	req->stroffset = dataoffset;
1628		616
1629	if (!SvREADONLY (data))	617	if (!SvREADONLY (data))
1630	{	618	{
1631	SvREADONLY_on (data);	619	SvREADONLY_on (data);
…		…
1645	dREQ;	633	dREQ;
1646		634
1647	data = newSV (NAME_MAX);	635	data = newSV (NAME_MAX);
1648	SvPOK_on (data);	636	SvPOK_on (data);
1649		637
1650	req->type = REQ_READLINK;	638	req->type = EIO_READLINK;
1651	req->sv1 = newSVsv (path);	639	req->sv1 = newSVsv (path);
1652	req->ptr2 = SvPVbyte_nolen (req->sv1);	640	req->ptr1 = SvPVbyte_nolen (req->sv1);
1653	req->sv2 = data;	641	req->sv2 = data;
1654	req->ptr1 = SvPVbyte_nolen (data);	642	req->ptr2 = SvPVbyte_nolen (data);
1655		643
1656	REQ_SEND;	644	REQ_SEND;
1657	}	645	}
1658		646
1659	void	647	void
…		…
1661	PROTOTYPE: $$$$;$	649	PROTOTYPE: $$$$;$
1662	PPCODE:	650	PPCODE:
1663	{	651	{
1664	dREQ;	652	dREQ;
1665		653
1666	req->type = REQ_SENDFILE;	654	req->type = EIO_SENDFILE;
1667	req->sv1 = newSVsv (out_fh);	655	req->sv1 = newSVsv (out_fh);
1668	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	656	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1669	req->sv2 = newSVsv (in_fh);	657	req->sv2 = newSVsv (in_fh);
1670	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	658	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1671	req->offs = SvVAL64 (in_offset);	659	req->offs = SvVAL64 (in_offset);
…		…
1679	PROTOTYPE: $$$;$	667	PROTOTYPE: $$$;$
1680	PPCODE:	668	PPCODE:
1681	{	669	{
1682	dREQ;	670	dREQ;
1683		671
1684	req->type = REQ_READAHEAD;	672	req->type = EIO_READAHEAD;
1685	req->sv1 = newSVsv (fh);	673	req->sv1 = newSVsv (fh);
1686	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1687	req->offs = SvVAL64 (offset);	675	req->offs = SvVAL64 (offset);
1688	req->size = length;	676	req->size = length;
1689		677
…		…
1691	}	679	}
1692		680
1693	void	681	void
1694	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)	682	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1695	ALIAS:	683	ALIAS:
1696	aio_stat = REQ_STAT	684	aio_stat = EIO_STAT
1697	aio_lstat = REQ_LSTAT	685	aio_lstat = EIO_LSTAT
1698	PPCODE:	686	PPCODE:
1699	{	687	{
1700	dREQ;	688	dREQ;
1701		689
1702	req->ptr2 = malloc (sizeof (Stat_t));	690	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1703	if (!req->ptr2)	691	if (!req->ptr2)
1704	{	692	{
1705	req_destroy (req);	693	req_destroy (req);
1706	croak ("out of memory during aio_stat statdata allocation");	694	croak ("out of memory during aio_stat statdata allocation");
1707	}	695	}
1708		696
1709	req->flags |= FLAG_PTR2_FREE;	697	req->flags |= EIO_FLAG_PTR2_FREE;
1710	req->sv1 = newSVsv (fh_or_path);	698	req->sv1 = newSVsv (fh_or_path);
1711		699
1712	if (SvPOK (fh_or_path))	700	if (SvPOK (fh_or_path))
1713	{	701	{
1714	req->type = ix;	702	req->type = ix;
1715	req->ptr1 = SvPVbyte_nolen (req->sv1);	703	req->ptr1 = SvPVbyte_nolen (req->sv1);
1716	}	704	}
1717	else	705	else
1718	{	706	{
1719	req->type = REQ_FSTAT;	707	req->type = EIO_FSTAT;
1720	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	708	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1721	}	709	}
1722		710
1723	REQ_SEND;	711	REQ_SEND;
1724	}	712	}
…		…
1733	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;	721	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1734	req->sv1 = newSVsv (fh_or_path);	722	req->sv1 = newSVsv (fh_or_path);
1735		723
1736	if (SvPOK (fh_or_path))	724	if (SvPOK (fh_or_path))
1737	{	725	{
1738	req->type = REQ_UTIME;	726	req->type = EIO_UTIME;
1739	req->ptr1 = SvPVbyte_nolen (req->sv1);	727	req->ptr1 = SvPVbyte_nolen (req->sv1);
1740	}	728	}
1741	else	729	else
1742	{	730	{
1743	req->type = REQ_FUTIME;	731	req->type = EIO_FUTIME;
1744	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1745	}	733	}
1746		734
1747	REQ_SEND;	735	REQ_SEND;
1748	}	736	}
…		…
1756	req->sv1 = newSVsv (fh_or_path);	744	req->sv1 = newSVsv (fh_or_path);
1757	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;	745	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1758		746
1759	if (SvPOK (fh_or_path))	747	if (SvPOK (fh_or_path))
1760	{	748	{
1761	req->type = REQ_TRUNCATE;	749	req->type = EIO_TRUNCATE;
1762	req->ptr1 = SvPVbyte_nolen (req->sv1);	750	req->ptr1 = SvPVbyte_nolen (req->sv1);
1763	}	751	}
1764	else	752	else
1765	{	753	{
1766	req->type = REQ_FTRUNCATE;	754	req->type = EIO_FTRUNCATE;
1767	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1768	}	756	}
1769		757
1770	REQ_SEND;	758	REQ_SEND;
1771	}	759	}
1772		760
1773	void	761	void
1774	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)	762	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		763	ALIAS:
		764	aio_chmod = EIO_CHMOD
		765	aio_fchmod = EIO_FCHMOD
		766	aio_mkdir = EIO_MKDIR
1775	PPCODE:	767	PPCODE:
1776	{	768	{
1777	dREQ;	769	dREQ;
1778		770
		771	req->type = ix;
1779	req->mode = mode;	772	req->int2 = mode;
1780	req->sv1 = newSVsv (fh_or_path);	773	req->sv1 = newSVsv (fh_or_path);
1781		774
1782	if (SvPOK (fh_or_path))	775	if (ix == EIO_FCHMOD)
1783	{	776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1784	req->type = REQ_CHMOD;
1785	req->ptr1 = SvPVbyte_nolen (req->sv1);
1786	}
1787	else	777	else
1788	{	778	req->ptr1 = SvPVbyte_nolen (req->sv1);
1789	req->type = REQ_FCHMOD;
1790	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1791	}
1792		779
1793	REQ_SEND;	780	REQ_SEND;
1794	}	781	}
1795		782
1796	void	783	void
…		…
1803	req->int3 = SvOK (gid) ? SvIV (gid) : -1;	790	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1804	req->sv1 = newSVsv (fh_or_path);	791	req->sv1 = newSVsv (fh_or_path);
1805		792
1806	if (SvPOK (fh_or_path))	793	if (SvPOK (fh_or_path))
1807	{	794	{
1808	req->type = REQ_CHOWN;	795	req->type = EIO_CHOWN;
1809	req->ptr1 = SvPVbyte_nolen (req->sv1);	796	req->ptr1 = SvPVbyte_nolen (req->sv1);
1810	}	797	}
1811	else	798	else
1812	{	799	{
1813	req->type = REQ_FCHOWN;	800	req->type = EIO_FCHOWN;
1814	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	801	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1815	}	802	}
1816		803
1817	REQ_SEND;	804	REQ_SEND;
1818	}	805	}
1819		806
1820	void	807	void
1821	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)	808	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1822	ALIAS:	809	ALIAS:
1823	aio_unlink = REQ_UNLINK	810	aio_unlink = EIO_UNLINK
1824	aio_rmdir = REQ_RMDIR	811	aio_rmdir = EIO_RMDIR
1825	aio_readdir = REQ_READDIR	812	aio_readdir = EIO_READDIR
1826	PPCODE:	813	PPCODE:
1827	{	814	{
1828	dREQ;	815	dREQ;
1829		816
1830	req->type = ix;	817	req->type = ix;
…		…
1833		820
1834	REQ_SEND;	821	REQ_SEND;
1835	}	822	}
1836		823
1837	void	824	void
1838	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)	825	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		826	ALIAS:
		827	aio_link = EIO_LINK
		828	aio_symlink = EIO_SYMLINK
		829	aio_rename = EIO_RENAME
1839	PPCODE:	830	PPCODE:
1840	{	831	{
1841	dREQ;	832	dREQ;
1842		833
		834	req->type = ix;
		835	req->sv1 = newSVsv (oldpath);
		836	req->ptr1 = SvPVbyte_nolen (req->sv1);
		837	req->sv2 = newSVsv (newpath);
		838	req->ptr2 = SvPVbyte_nolen (req->sv2);
		839
		840	REQ_SEND;
		841	}
		842
		843	void
		844	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		845	PPCODE:
		846	{
		847	dREQ;
		848
1843	req->type = REQ_MKDIR;	849	req->type = EIO_MKNOD;
1844	req->sv1 = newSVsv (pathname);	850	req->sv1 = newSVsv (pathname);
1845	req->ptr1 = SvPVbyte_nolen (req->sv1);	851	req->ptr1 = SvPVbyte_nolen (req->sv1);
1846	req->mode = mode;
1847
1848	REQ_SEND;
1849	}
1850
1851	void
1852	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1853	ALIAS:
1854	aio_link = REQ_LINK
1855	aio_symlink = REQ_SYMLINK
1856	aio_rename = REQ_RENAME
1857	PPCODE:
1858	{
1859	dREQ;
1860
1861	req->type = ix;
1862	req->sv2 = newSVsv (oldpath);
1863	req->ptr2 = SvPVbyte_nolen (req->sv2);
1864	req->sv1 = newSVsv (newpath);
1865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1866
1867	REQ_SEND;
1868	}
1869
1870	void
1871	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1872	PPCODE:
1873	{
1874	dREQ;
1875
1876	req->type = REQ_MKNOD;
1877	req->sv1 = newSVsv (pathname);
1878	req->ptr1 = SvPVbyte_nolen (req->sv1);
1879	req->mode = (mode_t)mode;	852	req->int2 = (mode_t)mode;
1880	req->offs = dev;	853	req->offs = dev;
1881		854
1882	REQ_SEND;	855	REQ_SEND;
1883	}	856	}
1884		857
…		…
1886	aio_busy (double delay, SV *callback=&PL_sv_undef)	859	aio_busy (double delay, SV *callback=&PL_sv_undef)
1887	PPCODE:	860	PPCODE:
1888	{	861	{
1889	dREQ;	862	dREQ;
1890		863
1891	req->type = REQ_BUSY;	864	req->type = EIO_BUSY;
1892	req->nv1 = delay < 0. ? 0. : delay;	865	req->nv1 = delay < 0. ? 0. : delay;
1893		866
1894	REQ_SEND;	867	REQ_SEND;
1895	}	868	}
1896		869
…		…
1899	PROTOTYPE: ;$	872	PROTOTYPE: ;$
1900	PPCODE:	873	PPCODE:
1901	{	874	{
1902	dREQ;	875	dREQ;
1903		876
1904	req->type = REQ_GROUP;	877	req->type = EIO_GROUP;
1905		878
1906	req_send (req);	879	eio_submit (req);
1907	XPUSHs (req_sv (req, AIO_GRP_KLASS));	880	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1908	}	881	}
1909		882
1910	void	883	void
1911	aio_nop (SV *callback=&PL_sv_undef)	884	aio_nop (SV *callback=&PL_sv_undef)
1912	ALIAS:	885	ALIAS:
1913	aio_nop = REQ_NOP	886	aio_nop = EIO_NOP
1914	aio_sync = REQ_SYNC	887	aio_sync = EIO_SYNC
1915	PPCODE:	888	PPCODE:
1916	{	889	{
1917	dREQ;	890	dREQ;
1918		891
1919	req->type = ix;	892	req->type = ix;
…		…
1923		896
1924	int	897	int
1925	aioreq_pri (int pri = 0)	898	aioreq_pri (int pri = 0)
1926	PROTOTYPE: ;$	899	PROTOTYPE: ;$
1927	CODE:	900	CODE:
1928	RETVAL = next_pri - PRI_BIAS;	901	RETVAL = next_pri - EIO_PRI_BIAS;
1929	if (items > 0)	902	if (items > 0)
1930	{	903	{
1931	if (pri < PRI_MIN) pri = PRI_MIN;	904	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1932	if (pri > PRI_MAX) pri = PRI_MAX;	905	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1933	next_pri = pri + PRI_BIAS;	906	next_pri = pri + EIO_PRI_BIAS;
1934	}	907	}
1935	OUTPUT:	908	OUTPUT:
1936	RETVAL	909	RETVAL
1937		910
1938	void	911	void
1939	aioreq_nice (int nice = 0)	912	aioreq_nice (int nice = 0)
1940	CODE:	913	CODE:
1941	nice = next_pri - nice;	914	nice = next_pri - nice;
1942	if (nice < PRI_MIN) nice = PRI_MIN;	915	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1943	if (nice > PRI_MAX) nice = PRI_MAX;	916	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1944	next_pri = nice + PRI_BIAS;	917	next_pri = nice + EIO_PRI_BIAS;
1945		918
1946	void	919	void
1947	flush ()	920	flush ()
1948	PROTOTYPE:	921	PROTOTYPE:
1949	CODE:	922	CODE:
…		…
1982	poll_wait()	955	poll_wait()
1983	PROTOTYPE:	956	PROTOTYPE:
1984	CODE:	957	CODE:
1985	poll_wait ();	958	poll_wait ();
1986		959
1987	void
1988	setsig (int signum = SIGIO)
1989	PROTOTYPE: ;$
1990	CODE:
1991	{
1992	if (block_sig_level)
1993	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1994
1995	X_LOCK (reslock);
1996	main_tid = pthread_self ();
1997	main_sig = signum;
1998	X_UNLOCK (reslock);
1999
2000	if (main_sig && npending)
2001	pthread_kill (main_tid, main_sig);
2002	}
2003
2004	void
2005	aio_block (SV *cb)
2006	PROTOTYPE: &
2007	PPCODE:
2008	{
2009	int count;
2010
2011	block_sig ();
2012	PUSHMARK (SP);
2013	PUTBACK;
2014	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
2015	unblock_sig ();
2016
2017	if (SvTRUE (ERRSV))
2018	croak (0);
2019
2020	XSRETURN (count);
2021	}
2022
2023	int	960	int
2024	nreqs()	961	nreqs()
2025	PROTOTYPE:	962	PROTOTYPE:
2026	CODE:	963	CODE:
2027	RETVAL = nreqs;	964	RETVAL = eio_nreqs ();
2028	OUTPUT:	965	OUTPUT:
2029	RETVAL	966	RETVAL
2030		967
2031	int	968	int
2032	nready()	969	nready()
2033	PROTOTYPE:	970	PROTOTYPE:
2034	CODE:	971	CODE:
2035	RETVAL = get_nready ();	972	RETVAL = eio_nready ();
2036	OUTPUT:	973	OUTPUT:
2037	RETVAL	974	RETVAL
2038		975
2039	int	976	int
2040	npending()	977	npending()
2041	PROTOTYPE:	978	PROTOTYPE:
2042	CODE:	979	CODE:
2043	RETVAL = get_npending ();	980	RETVAL = eio_npending ();
2044	OUTPUT:	981	OUTPUT:
2045	RETVAL	982	RETVAL
2046		983
2047	int	984	int
2048	nthreads()	985	nthreads()
…		…
2059	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	996	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
2060		997
2061	void	998	void
2062	cancel (aio_req_ornot req)	999	cancel (aio_req_ornot req)
2063	CODE:	1000	CODE:
2064	req_cancel (req);	1001	eio_cancel (req);
2065		1002
2066	void	1003	void
2067	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1004	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
2068	CODE:	1005	CODE:
2069	SvREFCNT_dec (req->callback);	1006	SvREFCNT_dec (req->callback);
…		…
2074	void	1011	void
2075	add (aio_req grp, ...)	1012	add (aio_req grp, ...)
2076	PPCODE:	1013	PPCODE:
2077	{	1014	{
2078	int i;	1015	int i;
2079	aio_req req;
2080
2081	if (main_sig && !block_sig_level)
2082	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
2083		1016
2084	if (grp->int1 == 2)	1017	if (grp->int1 == 2)
2085	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1018	croak ("cannot add requests to IO::AIO::GRP after the group finished");
2086		1019
2087	for (i = 1; i < items; ++i )	1020	for (i = 1; i < items; ++i )
2088	{	1021	{
		1022	aio_req req;
		1023
2089	if (GIMME_V != G_VOID)	1024	if (GIMME_V != G_VOID)
2090	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1025	XPUSHs (sv_2mortal (newSVsv (ST (i))));
2091		1026
2092	req = SvAIO_REQ (ST (i));	1027	req = SvAIO_REQ (ST (i));
2093		1028
2094	if (req)	1029	if (req)
2095	{	1030	eio_grp_add (grp, req);
2096	++grp->size;
2097	req->grp = grp;
2098
2099	req->grp_prev = 0;
2100	req->grp_next = grp->grp_first;
2101
2102	if (grp->grp_first)
2103	grp->grp_first->grp_prev = req;
2104
2105	grp->grp_first = req;
2106	}
2107	}	1031	}
2108	}	1032	}
2109		1033
2110	void	1034	void
2111	cancel_subs (aio_req_ornot req)	1035	cancel_subs (aio_req_ornot req)
…		…
2136	grp->errorno = errorno;	1060	grp->errorno = errorno;
2137		1061
2138	void	1062	void
2139	limit (aio_req grp, int limit)	1063	limit (aio_req grp, int limit)
2140	CODE:	1064	CODE:
2141	grp->int2 = limit;	1065	eio_grp_limit (grp, limit);
2142	aio_grp_feed (grp);
2143		1066
2144	void	1067	void
2145	feed (aio_req grp, SV *callback=&PL_sv_undef)	1068	feed (aio_req grp, SV *callback=&PL_sv_undef)
2146	CODE:	1069	CODE:
2147	{	1070	{
…		…
2149	grp->sv2 = newSVsv (callback);	1072	grp->sv2 = newSVsv (callback);
2150		1073
2151	if (grp->int2 <= 0)	1074	if (grp->int2 <= 0)
2152	grp->int2 = 2;	1075	grp->int2 = 2;
2153		1076
2154	aio_grp_feed (grp);	1077	eio_grp_limit (grp, grp->int2);
2155	}	1078	}
2156		1079

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