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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.46 by root, Sun Oct 22 00:49:29 2006 UTC vs.
Revision 1.90 by root, Tue Oct 31 00:32:19 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
34	# else	43	# else
35	# error sendfile support requested but not available	44	# error sendfile support requested but not available
36	# endif	45	# endif
37	#endif	46	#endif
38		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
39	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	52	#ifndef NAME_MAX
41	# define NAME_MAX 4096	53	# define NAME_MAX 4096
42	#endif	54	#endif
43		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
44	#if __ia64	61	#if __ia64
45	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	65	#else
47	# define STACKSIZE 8192	66	# define STACKSIZE 16384
48	#endif	67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDACCESS_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDACCESS_UNSAFE 0
		76	# else
		77	# define WORDACCESS_UNSAFE 1
		78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
		91
		92	typedef SV SV8; /* byte-sv, used for argument-checking */
49		93
50	enum {	94	enum {
51	REQ_QUIT,	95	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	96	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	97	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	98	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	99	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	100	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	101	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	102	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	103	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
60	REQ_SLEEP,	104	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	105	REQ_BUSY,
62	};	106	};
63		107
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	108	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	109	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		110
67	typedef struct aio_cb	111	typedef struct aio_cb
68	{	112	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	113	struct aio_cb *volatile next;
72		114
		115	SV *callback, *fh;
		116	SV *sv1, *sv2;
		117	void *ptr1, *ptr2;
		118	off_t offs;
		119	size_t size;
		120	ssize_t result;
		121
		122	STRLEN stroffset;
		123	int type;
		124	int int1, int2;
		125	int errorno;
		126	mode_t mode; /* open */
		127
		128	unsigned char flags;
		129	unsigned char pri;
		130
73	SV *self; /* the perl counterpart of this request, if any */	131	SV *self; /* the perl counterpart of this request, if any */
74		132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;	133	} aio_cb;
		134
		135	enum {
		136	FLAG_CANCELLED = 0x01, /* request was cancelled */
		137	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		138	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		139	};
90		140
91	typedef aio_cb *aio_req;	141	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	142	typedef aio_cb *aio_req_ornot;
93		143
		144	enum {
		145	PRI_MIN = -4,
		146	PRI_MAX = 4,
		147
		148	DEFAULT_PRI = 0,
		149	PRI_BIAS = -PRI_MIN,
		150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		151	};
		152
		153	#define AIO_TICKS ((1000000 + 1023) >> 10)
		154
		155	static unsigned int max_poll_time = 0;
		156	static unsigned int max_poll_reqs = 0;
		157
		158	/* calculcate time difference in ~1/AIO_TICKS of a second */
		159	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		160	{
		161	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		162	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		163	}
		164
		165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		166
94	static int started, wanted;	167	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	168
96	static int max_outstanding = 1<<30;	169	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		170	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		171	#else
		172	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		173	#endif
		174
		175	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		176	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		177
		178	/* worker threads management */
		179	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		180
		181	typedef struct worker {
		182	/* locked by wrklock */
		183	struct worker *prev, *next;
		184
		185	pthread_t tid;
		186
		187	/* locked by reslock, reqlock or wrklock */
		188	aio_req req; /* currently processed request */
		189	void *dbuf;
		190	DIR *dirp;
		191	} worker;
		192
		193	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		194
		195	static void worker_clear (worker *wrk)
		196	{
		197	if (wrk->dirp)
		198	{
		199	closedir (wrk->dirp);
		200	wrk->dirp = 0;
		201	}
		202
		203	if (wrk->dbuf)
		204	{
		205	free (wrk->dbuf);
		206	wrk->dbuf = 0;
		207	}
		208	}
		209
		210	static void worker_free (worker *wrk)
		211	{
		212	wrk->next->prev = wrk->prev;
		213	wrk->prev->next = wrk->next;
		214
		215	free (wrk);
		216	}
		217
		218	static volatile unsigned int nreqs, nready, npending;
		219	static volatile unsigned int max_idle = 4;
		220	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	221	static int respipe [2];
98		222
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		226
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	227	#if WORDACCESS_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		228
		229	static unsigned int get_nready ()
		230	{
		231	unsigned int retval;
		232
		233	LOCK (reqlock);
		234	retval = nready;
		235	UNLOCK (reqlock);
		236
		237	return retval;
		238	}
		239
		240	static unsigned int get_npending ()
		241	{
		242	unsigned int retval;
		243
		244	LOCK (reslock);
		245	retval = npending;
		246	UNLOCK (reslock);
		247
		248	return retval;
		249	}
		250
		251	static unsigned int get_nthreads ()
		252	{
		253	unsigned int retval;
		254
		255	LOCK (wrklock);
		256	retval = started;
		257	UNLOCK (wrklock);
		258
		259	return retval;
		260	}
		261
		262	#else
		263
		264	# define get_nready() nready
		265	# define get_npending() npending
		266	# define get_nthreads() started
		267
		268	#endif
		269
		270	/*
		271	* a somewhat faster data structure might be nice, but
		272	* with 8 priorities this actually needs <20 insns
		273	* per shift, the most expensive operation.
		274	*/
		275	typedef struct {
		276	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		277	int size;
		278	} reqq;
		279
		280	static reqq req_queue;
		281	static reqq res_queue;
		282
		283	int reqq_push (reqq *q, aio_req req)
		284	{
		285	int pri = req->pri;
		286	req->next = 0;
		287
		288	if (q->qe[pri])
		289	{
		290	q->qe[pri]->next = req;
		291	q->qe[pri] = req;
		292	}
		293	else
		294	q->qe[pri] = q->qs[pri] = req;
		295
		296	return q->size++;
		297	}
		298
		299	aio_req reqq_shift (reqq *q)
		300	{
		301	int pri;
		302
		303	if (!q->size)
		304	return 0;
		305
		306	--q->size;
		307
		308	for (pri = NUM_PRI; pri--; )
		309	{
		310	aio_req req = q->qs[pri];
		311
		312	if (req)
		313	{
		314	if (!(q->qs[pri] = req->next))
		315	q->qe[pri] = 0;
		316
		317	return req;
		318	}
		319	}
		320
		321	abort ();
		322	}
		323
		324	static int poll_cb ();
		325	static void req_invoke (aio_req req);
106	static void req_free (aio_req req);	326	static void req_free (aio_req req);
		327	static void req_cancel (aio_req req);
107		328
108	/* must be called at most once */	329	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	330	static SV *req_sv (aio_req req, const char *klass)
110	{	331	{
		332	if (!req->self)
		333	{
111	req->self = (SV *)newHV ();	334	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	335	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		336	}
113		337
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	338	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	339	}
116		340
117	static aio_req SvAIO_REQ (SV *sv)	341	static aio_req SvAIO_REQ (SV *sv)
118	{	342	{
		343	MAGIC *mg;
		344
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	345	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	346	croak ("object of class " AIO_REQ_KLASS " expected");
121		347
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	348	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		349
124	return mg ? (aio_req)mg->mg_ptr : 0;	350	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	351	}
126		352
127	static void poll_wait ()	353	static void aio_grp_feed (aio_req grp)
128	{	354	{
129	if (nreqs && !ress)	355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
130	{	356	{
131	fd_set rfd;	357	int old_len = grp->size;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		358
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	359	if (grp->sv2 && SvOK (grp->sv2))
		360	{
		361	dSP;
		362
		363	ENTER;
		364	SAVETMPS;
		365	PUSHMARK (SP);
		366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		367	PUTBACK;
		368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		369	SPAGAIN;
		370	FREETMPS;
		371	LEAVE;
		372	}
		373
		374	/* stop if no progress has been made */
		375	if (old_len == grp->size)
		376	{
		377	SvREFCNT_dec (grp->sv2);
		378	grp->sv2 = 0;
		379	break;
		380	}
136	}	381	}
137	}	382	}
138		383
		384	static void aio_grp_dec (aio_req grp)
		385	{
		386	--grp->size;
		387
		388	/* call feeder, if applicable */
		389	aio_grp_feed (grp);
		390
		391	/* finish, if done */
		392	if (!grp->size && grp->int1)
		393	{
		394	req_invoke (grp);
		395	req_free (grp);
		396	}
		397	}
		398
139	static void req_invoke (aio_req req)	399	static void req_invoke (aio_req req)
140	{	400	{
141	dSP;	401	dSP;
142	int errorno = errno;
143		402
144	if (req->cancelled || !SvOK (req->callback))	403	if (req->flags & FLAG_SV1_RO_OFF)
145	return;	404	SvREADONLY_off (req->sv1);
146		405
147	errno = req->errorno;	406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
148
149	ENTER;
150	PUSHMARK (SP);
151
152	switch (req->type)
153	{	407	{
154	case REQ_READDIR:	408	ENTER;
		409	SAVETMPS;
		410	PUSHMARK (SP);
		411	EXTEND (SP, 1);
		412
		413	switch (req->type)
155	{	414	{
156	SV *rv = &PL_sv_undef;	415	case REQ_READDIR:
157
158	if (req->result >= 0)
159	{	416	{
160	char *buf = req->data2ptr;	417	SV *rv = &PL_sv_undef;
161	AV *av = newAV ();
162		418
163	while (req->result)	419	if (req->result >= 0)
164	{	420	{
		421	int i;
		422	char *buf = req->ptr2;
		423	AV *av = newAV ();
		424
		425	av_extend (av, req->result - 1);
		426
		427	for (i = 0; i < req->result; ++i)
		428	{
165	SV *sv = newSVpv (buf, 0);	429	SV *sv = newSVpv (buf, 0);
166		430
167	av_push (av, sv);	431	av_store (av, i, sv);
168	buf += SvCUR (sv) + 1;	432	buf += SvCUR (sv) + 1;
169	req->result--;	433	}
		434
		435	rv = sv_2mortal (newRV_noinc ((SV *)av));
170	}	436	}
171		437
172	rv = sv_2mortal (newRV_noinc ((SV *)av));	438	PUSHs (rv);
173	}	439	}
		440	break;
174		441
		442	case REQ_OPEN:
		443	{
		444	/* convert fd to fh */
		445	SV *fh;
		446
		447	PUSHs (sv_2mortal (newSViv (req->result)));
		448	PUTBACK;
		449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		450	SPAGAIN;
		451
		452	fh = SvREFCNT_inc (POPs);
		453
		454	PUSHMARK (SP);
		455	XPUSHs (sv_2mortal (fh));
		456	}
		457	break;
		458
		459	case REQ_GROUP:
		460	req->int1 = 2; /* mark group as finished */
		461
		462	if (req->sv1)
		463	{
		464	int i;
		465	AV *av = (AV *)req->sv1;
		466
		467	EXTEND (SP, AvFILL (av) + 1);
		468	for (i = 0; i <= AvFILL (av); ++i)
		469	PUSHs (*av_fetch (av, i, 0));
		470	}
		471	break;
		472
		473	case REQ_NOP:
		474	case REQ_BUSY:
		475	break;
		476
		477	case REQ_READLINK:
		478	if (req->result > 0)
		479	{
		480	SvCUR_set (req->sv1, req->result);
		481	*SvEND (req->sv1) = 0;
175	XPUSHs (rv);	482	PUSHs (req->sv1);
		483	}
		484	break;
		485
		486	case REQ_STAT:
		487	case REQ_LSTAT:
		488	case REQ_FSTAT:
		489	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		490	PL_laststatval = req->result;
		491	PL_statcache = *(Stat_t *)(req->ptr2);
		492	PUSHs (sv_2mortal (newSViv (req->result)));
		493	break;
		494
		495	case REQ_READ:
		496	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		497	*SvEND (req->sv1) = 0;
		498	PUSHs (sv_2mortal (newSViv (req->result)));
		499	break;
		500
		501	default:
		502	PUSHs (sv_2mortal (newSViv (req->result)));
		503	break;
176	}	504	}
177	break;
178		505
179	case REQ_OPEN:	506	errno = req->errorno;
180	{
181	/* convert fd to fh */
182	SV *fh;
183		507
184	XPUSHs (sv_2mortal (newSViv (req->result)));
185	PUTBACK;	508	PUTBACK;
186	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	509	call_sv (req->callback, G_VOID | G_EVAL);
187	SPAGAIN;	510	SPAGAIN;
188		511
189	fh = SvREFCNT_inc (POPs);	512	FREETMPS;
190		513	LEAVE;
191	PUSHMARK (SP);
192	XPUSHs (sv_2mortal (fh));
193	}
194	break;
195
196	case REQ_SLEEP:
197	case REQ_GROUP:
198	break;
199
200	default:
201	XPUSHs (sv_2mortal (newSViv (req->result)));
202	break;
203	}	514	}
204		515
		516	if (req->grp)
		517	{
		518	aio_req grp = req->grp;
205		519
206	PUTBACK;	520	/* unlink request */
207	call_sv (req->callback, G_VOID | G_EVAL);	521	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
208	SPAGAIN;	522	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		523
		524	if (grp->grp_first == req)
		525	grp->grp_first = req->grp_next;
		526
		527	aio_grp_dec (grp);
		528	}
209		529
210	if (SvTRUE (ERRSV))	530	if (SvTRUE (ERRSV))
211	{	531	{
212	req_free (req);	532	req_free (req);
213	croak (0);	533	croak (0);
214	}	534	}
215
216	LEAVE;
217
218	errno = errorno;
219	}	535	}
220		536
221	static void req_free (aio_req req)	537	static void req_free (aio_req req)
222	{	538	{
223	if (req->grp)
224	{
225	aio_req grp = req->grp;
226
227	/* unlink request */
228	req->grp_next->grp_prev = req->grp_prev;
229	req->grp_prev->grp_next = req->grp_next;
230
231	if (grp->grp_next == grp && grp->fd)
232	{
233	req_invoke (grp);
234	req_free (grp);
235	}
236	}
237
238	if (req->self)	539	if (req->self)
239	{	540	{
240	sv_unmagic (req->self, PERL_MAGIC_ext);	541	sv_unmagic (req->self, PERL_MAGIC_ext);
241	SvREFCNT_dec (req->self);	542	SvREFCNT_dec (req->self);
242	}	543	}
243		544
244	if (req->data)
245	SvREFCNT_dec (req->data);
246
247	if (req->fh)
248	SvREFCNT_dec (req->fh);	545	SvREFCNT_dec (req->fh);
249		546	SvREFCNT_dec (req->sv1);
250	if (req->fh2)
251	SvREFCNT_dec (req->fh2);	547	SvREFCNT_dec (req->sv2);
252
253	if (req->statdata)
254	Safefree (req->statdata);
255
256	if (req->callback)
257	SvREFCNT_dec (req->callback);	548	SvREFCNT_dec (req->callback);
258		549
259	if (req->type == REQ_READDIR && req->result >= 0)	550	if (req->flags & FLAG_PTR2_FREE)
260	free (req->data2ptr);	551	free (req->ptr2);
261		552
262	Safefree (req);	553	Safefree (req);
263	}	554	}
264		555
		556	static void req_cancel_subs (aio_req grp)
		557	{
		558	aio_req sub;
		559
		560	if (grp->type != REQ_GROUP)
		561	return;
		562
		563	SvREFCNT_dec (grp->sv2);
		564	grp->sv2 = 0;
		565
		566	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		567	req_cancel (sub);
		568	}
		569
265	static void req_cancel (aio_req req)	570	static void req_cancel (aio_req req)
266	{	571	{
267	req->cancelled = 1;	572	req->flags |= FLAG_CANCELLED;
268		573
269	if (req->type == REQ_GROUP)	574	req_cancel_subs (req);
270	{
271	aio_req sub;
272
273	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
274	req_cancel (sub);
275	}
276	}
277
278	static int poll_cb ()
279	{
280	dSP;
281	int count = 0;
282	int do_croak = 0;
283	aio_req req;
284
285	for (;;)
286	{
287	pthread_mutex_lock (&reslock);
288	req = ress;
289
290	if (req)
291	{
292	ress = req->next;
293
294	if (!ress)
295	{
296	/* read any signals sent by the worker threads */
297	char buf [32];
298	while (read (respipe [0], buf, 32) == 32)
299	;
300
301	rese = 0;
302	}
303	}
304
305	pthread_mutex_unlock (&reslock);
306
307	if (!req)
308	break;
309
310	nreqs--;
311
312	if (req->type == REQ_QUIT)
313	started--;
314	else if (req->type == REQ_GROUP && req->grp_next != req)
315	{
316	req->fd = 1; /* mark request as delayed */
317	continue;
318	}
319	else
320	{
321	if (req->type == REQ_READ)
322	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
323
324	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
325	SvREADONLY_off (req->data);
326
327	if (req->statdata)
328	{
329	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
330	PL_laststatval = req->result;
331	PL_statcache = *(req->statdata);
332	}
333
334	req_invoke (req);
335
336	count++;
337	}
338
339	req_free (req);
340	}
341
342	return count;
343	}	575	}
344		576
345	static void *aio_proc(void *arg);	577	static void *aio_proc(void *arg);
346		578
347	static void start_thread (void)	579	static void start_thread (void)
348	{	580	{
349	sigset_t fullsigset, oldsigset;	581	sigset_t fullsigset, oldsigset;
350	pthread_t tid;
351	pthread_attr_t attr;	582	pthread_attr_t attr;
		583
		584	worker *wrk = calloc (1, sizeof (worker));
		585
		586	if (!wrk)
		587	croak ("unable to allocate worker thread data");
352		588
353	pthread_attr_init (&attr);	589	pthread_attr_init (&attr);
354	pthread_attr_setstacksize (&attr, STACKSIZE);	590	pthread_attr_setstacksize (&attr, STACKSIZE);
355	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	591	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		592	#ifdef PTHREAD_SCOPE_PROCESS
		593	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		594	#endif
356		595
357	sigfillset (&fullsigset);	596	sigfillset (&fullsigset);
		597
		598	LOCK (wrklock);
358	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
359		600
360	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
361	started++;
362
363	sigprocmask (SIG_SETMASK, &oldsigset, 0);
364	}
365
366	static void req_send (aio_req req)
367	{
368	while (started < wanted && nreqs >= started)
369	start_thread ();
370
371	nreqs++;
372
373	pthread_mutex_lock (&reqlock);
374
375	req->next = 0;
376
377	if (reqe)
378	{	602	{
379	reqe->next = req;	603	wrk->prev = &wrk_first;
380	reqe = req;	604	wrk->next = wrk_first.next;
		605	wrk_first.next->prev = wrk;
		606	wrk_first.next = wrk;
		607	++started;
381	}	608	}
382	else	609	else
383	reqe = reqs = req;	610	free (wrk);
384		611
		612	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		613	UNLOCK (wrklock);
		614	}
		615
		616	static void maybe_start_thread ()
		617	{
		618	if (get_nthreads () >= wanted)
		619	return;
		620
		621	/* todo: maybe use idle here, but might be less exact */
		622	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		623	return;
		624
		625	start_thread ();
		626	}
		627
		628	static void req_send (aio_req req)
		629	{
		630	++nreqs;
		631
		632	LOCK (reqlock);
		633	++nready;
		634	reqq_push (&req_queue, req);
385	pthread_cond_signal (&reqwait);	635	pthread_cond_signal (&reqwait);
386	pthread_mutex_unlock (&reqlock);	636	UNLOCK (reqlock);
387		637
388	if (nreqs > max_outstanding)	638	maybe_start_thread ();
389	for (;;)
390	{
391	poll_cb ();
392
393	if (nreqs <= max_outstanding)
394	break;
395
396	poll_wait ();
397	}
398	}	639	}
399		640
400	static void end_thread (void)	641	static void end_thread (void)
401	{	642	{
402	aio_req req;	643	aio_req req;
		644
403	Newz (0, req, 1, aio_cb);	645	Newz (0, req, 1, aio_cb);
		646
404	req->type = REQ_QUIT;	647	req->type = REQ_QUIT;
		648	req->pri = PRI_MAX + PRI_BIAS;
405		649
406	req_send (req);	650	LOCK (reqlock);
		651	reqq_push (&req_queue, req);
		652	pthread_cond_signal (&reqwait);
		653	UNLOCK (reqlock);
		654
		655	LOCK (wrklock);
		656	--started;
		657	UNLOCK (wrklock);
		658	}
		659
		660	static void set_max_idle (int nthreads)
		661	{
		662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		663	max_idle = nthreads <= 0 ? 1 : nthreads;
		664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
407	}	665	}
408		666
409	static void min_parallel (int nthreads)	667	static void min_parallel (int nthreads)
410	{	668	{
411	if (wanted < nthreads)	669	if (wanted < nthreads)
412	wanted = nthreads;	670	wanted = nthreads;
413	}	671	}
414		672
415	static void max_parallel (int nthreads)	673	static void max_parallel (int nthreads)
416	{	674	{
417	int cur = started;
418
419	if (wanted > nthreads)	675	if (wanted > nthreads)
420	wanted = nthreads;	676	wanted = nthreads;
421		677
422	while (cur > wanted)	678	while (started > wanted)
		679	end_thread ();
		680	}
		681
		682	static void poll_wait ()
		683	{
		684	fd_set rfd;
		685
		686	while (nreqs)
423	{	687	{
		688	int size;
		689	if (WORDACCESS_UNSAFE) LOCK (reslock);
		690	size = res_queue.size;
		691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		692
		693	if (size)
		694	return;
		695
424	end_thread ();	696	maybe_start_thread ();
425	cur--;	697
		698	FD_ZERO(&rfd);
		699	FD_SET(respipe [0], &rfd);
		700
		701	select (respipe [0] + 1, &rfd, 0, 0, 0);
426	}	702	}
		703	}
427		704
428	while (started > wanted)	705	static int poll_cb ()
		706	{
		707	dSP;
		708	int count = 0;
		709	int maxreqs = max_poll_reqs;
		710	int do_croak = 0;
		711	struct timeval tv_start, tv_now;
		712	aio_req req;
		713
		714	if (max_poll_time)
		715	gettimeofday (&tv_start, 0);
		716
		717	for (;;)
429	{	718	{
		719	for (;;)
		720	{
		721	maybe_start_thread ();
		722
		723	LOCK (reslock);
		724	req = reqq_shift (&res_queue);
		725
		726	if (req)
		727	{
		728	--npending;
		729
		730	if (!res_queue.size)
		731	{
		732	/* read any signals sent by the worker threads */
		733	char buf [32];
		734	while (read (respipe [0], buf, 32) == 32)
		735	;
		736	}
		737	}
		738
		739	UNLOCK (reslock);
		740
		741	if (!req)
		742	break;
		743
		744	--nreqs;
		745
		746	if (req->type == REQ_GROUP && req->size)
		747	{
		748	req->int1 = 1; /* mark request as delayed */
		749	continue;
		750	}
		751	else
		752	{
		753	req_invoke (req);
		754
		755	count++;
		756	}
		757
		758	req_free (req);
		759
		760	if (maxreqs && !--maxreqs)
		761	break;
		762
		763	if (max_poll_time)
		764	{
		765	gettimeofday (&tv_now, 0);
		766
		767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		768	break;
		769	}
		770	}
		771
		772	if (nreqs <= max_outstanding)
		773	break;
		774
430	poll_wait ();	775	poll_wait ();
431	poll_cb ();	776
		777	++maxreqs;
432	}	778	}
		779
		780	return count;
433	}	781	}
434		782
435	static void create_pipe ()	783	static void create_pipe ()
436	{	784	{
437	if (pipe (respipe))	785	if (pipe (respipe))
…		…
461	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	809	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
462	{	810	{
463	ssize_t res;	811	ssize_t res;
464	off_t ooffset;	812	off_t ooffset;
465		813
466	pthread_mutex_lock (&preadwritelock);	814	LOCK (preadwritelock);
467	ooffset = lseek (fd, 0, SEEK_CUR);	815	ooffset = lseek (fd, 0, SEEK_CUR);
468	lseek (fd, offset, SEEK_SET);	816	lseek (fd, offset, SEEK_SET);
469	res = read (fd, buf, count);	817	res = read (fd, buf, count);
470	lseek (fd, ooffset, SEEK_SET);	818	lseek (fd, ooffset, SEEK_SET);
471	pthread_mutex_unlock (&preadwritelock);	819	UNLOCK (preadwritelock);
472		820
473	return res;	821	return res;
474	}	822	}
475		823
476	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	824	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
477	{	825	{
478	ssize_t res;	826	ssize_t res;
479	off_t ooffset;	827	off_t ooffset;
480		828
481	pthread_mutex_lock (&preadwritelock);	829	LOCK (preadwritelock);
482	ooffset = lseek (fd, 0, SEEK_CUR);	830	ooffset = lseek (fd, 0, SEEK_CUR);
483	lseek (fd, offset, SEEK_SET);	831	lseek (fd, offset, SEEK_SET);
484	res = write (fd, buf, count);	832	res = write (fd, buf, count);
485	lseek (fd, offset, SEEK_SET);	833	lseek (fd, offset, SEEK_SET);
486	pthread_mutex_unlock (&preadwritelock);	834	UNLOCK (preadwritelock);
487		835
488	return res;	836	return res;
489	}	837	}
490	#endif	838	#endif
491		839
492	#if !HAVE_FDATASYNC	840	#if !HAVE_FDATASYNC
493	# define fdatasync fsync	841	# define fdatasync fsync
494	#endif	842	#endif
495		843
496	#if !HAVE_READAHEAD	844	#if !HAVE_READAHEAD
497	# define readahead aio_readahead	845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
498		846
499	static ssize_t readahead (int fd, off_t offset, size_t count)	847	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
500	{	848	{
501	char readahead_buf[4096];	849	dBUF;
502		850
503	while (count > 0)	851	while (count > 0)
504	{	852	{
505	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
506		854
507	pread (fd, readahead_buf, len, offset);	855	pread (fd, aio_buf, len, offset);
508	offset += len;	856	offset += len;
509	count -= len;	857	count -= len;
510	}	858	}
511		859
512	errno = 0;	860	errno = 0;
513	}	861	}
		862
514	#endif	863	#endif
515		864
516	#if !HAVE_READDIR_R	865	#if !HAVE_READDIR_R
517	# define readdir_r aio_readdir_r	866	# define readdir_r aio_readdir_r
518		867
…		…
521	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	870	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
522	{	871	{
523	struct dirent *e;	872	struct dirent *e;
524	int errorno;	873	int errorno;
525		874
526	pthread_mutex_lock (&readdirlock);	875	LOCK (readdirlock);
527		876
528	e = readdir (dirp);	877	e = readdir (dirp);
529	errorno = errno;	878	errorno = errno;
530		879
531	if (e)	880	if (e)
…		…
534	strcpy (ent->d_name, e->d_name);	883	strcpy (ent->d_name, e->d_name);
535	}	884	}
536	else	885	else
537	*res = 0;	886	*res = 0;
538		887
539	pthread_mutex_unlock (&readdirlock);	888	UNLOCK (readdirlock);
540		889
541	errno = errorno;	890	errno = errorno;
542	return e ? 0 : -1;	891	return e ? 0 : -1;
543	}	892	}
544	#endif	893	#endif
545		894
546	/* sendfile always needs emulation */	895	/* sendfile always needs emulation */
547	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	896	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
548	{	897	{
549	ssize_t res;	898	ssize_t res;
550		899
551	if (!count)	900	if (!count)
552	return 0;	901	return 0;
…		…
563	{	912	{
564	off_t sbytes;	913	off_t sbytes;
565	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	914	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566		915
567	if (res < 0 && sbytes)	916	if (res < 0 && sbytes)
568	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	917	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
569	res = sbytes;	918	res = sbytes;
570	}	919	}
571		920
572	# elif __hpux	921	# elif __hpux
573	res = sendfile (ofd, ifd, offset, count, 0, 0);	922	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
601	#endif	950	#endif
602	)	951	)
603	)	952	)
604	{	953	{
605	/* emulate sendfile. this is a major pain in the ass */	954	/* emulate sendfile. this is a major pain in the ass */
606	char buf[4096];	955	dBUF;
		956
607	res = 0;	957	res = 0;
608		958
609	while (count)	959	while (count)
610	{	960	{
611	ssize_t cnt;	961	ssize_t cnt;
612		962
613	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	963	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
614		964
615	if (cnt <= 0)	965	if (cnt <= 0)
616	{	966	{
617	if (cnt && !res) res = -1;	967	if (cnt && !res) res = -1;
618	break;	968	break;
619	}	969	}
620		970
621	cnt = write (ofd, buf, cnt);	971	cnt = write (ofd, aio_buf, cnt);
622		972
623	if (cnt <= 0)	973	if (cnt <= 0)
624	{	974	{
625	if (cnt && !res) res = -1;	975	if (cnt && !res) res = -1;
626	break;	976	break;
…		…
634		984
635	return res;	985	return res;
636	}	986	}
637		987
638	/* read a full directory */	988	/* read a full directory */
639	static int scandir_ (const char *path, void **namesp)	989	static void scandir_ (aio_req req, worker *self)
640	{	990	{
641	DIR *dirp = opendir (path);	991	DIR *dirp;
642	union	992	union
643	{	993	{
644	struct dirent d;	994	struct dirent d;
645	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646	} u;	996	} *u;
647	struct dirent *entp;	997	struct dirent *entp;
648	char *name, *names;	998	char *name, *names;
649	int memlen = 4096;	999	int memlen = 4096;
650	int memofs = 0;	1000	int memofs = 0;
651	int res = 0;	1001	int res = 0;
652	int errorno;	1002	int errorno;
653		1003
654	if (!dirp)	1004	LOCK (wrklock);
655	return -1;	1005	self->dirp = dirp = opendir (req->ptr1);
656		1006	self->dbuf = u = malloc (sizeof (*u));
		1007	req->flags |= FLAG_PTR2_FREE;
657	names = malloc (memlen);	1008	req->ptr2 = names = malloc (memlen);
		1009	UNLOCK (wrklock);
		1010
		1011	if (dirp && u && names)
		1012	for (;;)
		1013	{
		1014	errno = 0;
		1015	readdir_r (dirp, &u->d, &entp);
		1016
		1017	if (!entp)
		1018	break;
		1019
		1020	name = entp->d_name;
		1021
		1022	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1023	{
		1024	int len = strlen (name) + 1;
		1025
		1026	res++;
		1027
		1028	while (memofs + len > memlen)
		1029	{
		1030	memlen *= 2;
		1031	LOCK (wrklock);
		1032	req->ptr2 = names = realloc (names, memlen);
		1033	UNLOCK (wrklock);
		1034
		1035	if (!names)
		1036	break;
		1037	}
		1038
		1039	memcpy (names + memofs, name, len);
		1040	memofs += len;
		1041	}
		1042	}
		1043
		1044	if (errno)
		1045	res = -1;
		1046
		1047	req->result = res;
		1048	}
		1049
		1050	/*****************************************************************************/
		1051
		1052	static void *aio_proc (void *thr_arg)
		1053	{
		1054	aio_req req;
		1055	struct timespec ts;
		1056	worker *self = (worker *)thr_arg;
		1057
		1058	/* try to distribute timeouts somewhat evenly */
		1059	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1060	* (1000000000UL / 1024UL);
658		1061
659	for (;;)	1062	for (;;)
660	{	1063	{
661	errno = 0, readdir_r (dirp, &u.d, &entp);	1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;
662		1065
663	if (!entp)	1066	LOCK (reqlock);
664	break;
665
666	name = entp->d_name;
667
668	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
669	{
670	int len = strlen (name) + 1;
671
672	res++;
673
674	while (memofs + len > memlen)
675	{
676	memlen *= 2;
677	names = realloc (names, memlen);
678	if (!names)
679	break;
680	}
681
682	memcpy (names + memofs, name, len);
683	memofs += len;
684	}
685	}
686
687	errorno = errno;
688	closedir (dirp);
689
690	if (errorno)
691	{
692	free (names);
693	errno = errorno;
694	res = -1;
695	}
696
697	*namesp = (void *)names;
698	return res;
699	}
700
701	/*****************************************************************************/
702
703	static void *aio_proc (void *thr_arg)
704	{
705	aio_req req;
706	int type;
707
708	do
709	{
710	pthread_mutex_lock (&reqlock);
711		1067
712	for (;;)	1068	for (;;)
713	{	1069	{
714	req = reqs;	1070	self->req = req = reqq_shift (&req_queue);
715
716	if (reqs)
717	{
718	reqs = reqs->next;
719	if (!reqs) reqe = 0;
720	}
721		1071
722	if (req)	1072	if (req)
723	break;	1073	break;
724		1074
		1075	++idle;
		1076
		1077	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1078	== ETIMEDOUT)
		1079	{
		1080	if (idle > max_idle)
		1081	{
		1082	--idle;
		1083	UNLOCK (reqlock);
		1084	LOCK (wrklock);
		1085	--started;
		1086	UNLOCK (wrklock);
		1087	goto quit;
		1088	}
		1089
		1090	/* we are allowed to idle, so do so without any timeout */
725	pthread_cond_wait (&reqwait, &reqlock);	1091	pthread_cond_wait (&reqwait, &reqlock);
		1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1093	}
		1094
		1095	--idle;
726	}	1096	}
727		1097
728	pthread_mutex_unlock (&reqlock);	1098	--nready;
		1099
		1100	UNLOCK (reqlock);
729		1101
730	errno = 0; /* strictly unnecessary */	1102	errno = 0; /* strictly unnecessary */
731		1103
732	if (!req->cancelled)	1104	if (!(req->flags & FLAG_CANCELLED))
733	switch (req->type)	1105	switch (req->type)
734	{	1106	{
735	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1107	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
736	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1108	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
737		1109
738	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1110	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
739	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1111	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
740		1112
741	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1113	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
742	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1114	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
743	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1115	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
744		1116
745	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1117	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
746	case REQ_CLOSE: req->result = close (req->fd); break;	1118	case REQ_CLOSE: req->result = close (req->int1); break;
747	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
748	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
749	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
750	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
751	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1123	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1124	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1125	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
752		1126
753	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
754	case REQ_FSYNC: req->result = fsync (req->fd); break;	1128	case REQ_FSYNC: req->result = fsync (req->int1); break;
755	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1129	case REQ_READDIR: scandir_ (req, self); break;
756		1130
757	case REQ_SLEEP:	1131	case REQ_BUSY:
758	{	1132	{
759	struct timeval tv;	1133	struct timeval tv;
760		1134
761	tv.tv_sec = req->fd;	1135	tv.tv_sec = req->int1;
762	tv.tv_usec = req->fd2;	1136	tv.tv_usec = req->int2;
763		1137
764	req->result = select (0, 0, 0, 0, &tv);	1138	req->result = select (0, 0, 0, 0, &tv);
765	}	1139	}
766		1140
		1141	case REQ_GROUP:
		1142	case REQ_NOP:
		1143	break;
		1144
767	case REQ_QUIT:	1145	case REQ_QUIT:
768	break;	1146	goto quit;
769		1147
770	default:	1148	default:
771	req->result = ENOSYS;	1149	req->result = ENOSYS;
772	break;	1150	break;
773	}	1151	}
774		1152
775	req->errorno = errno;	1153	req->errorno = errno;
776		1154
777	pthread_mutex_lock (&reslock);	1155	LOCK (reslock);
778		1156
779	req->next = 0;	1157	++npending;
780		1158
781	if (rese)	1159	if (!reqq_push (&res_queue, req))
782	{
783	rese->next = req;
784	rese = req;
785	}
786	else
787	{
788	rese = ress = req;
789
790	/* write a dummy byte to the pipe so fh becomes ready */	1160	/* write a dummy byte to the pipe so fh becomes ready */
791	write (respipe [1], &respipe, 1);	1161	write (respipe [1], &respipe, 1);
792	}
793		1162
794	pthread_mutex_unlock (&reslock);	1163	self->req = 0;
		1164	worker_clear (self);
		1165
		1166	UNLOCK (reslock);
795	}	1167	}
796	while (type != REQ_QUIT);	1168
		1169	quit:
		1170	LOCK (wrklock);
		1171	worker_free (self);
		1172	UNLOCK (wrklock);
797		1173
798	return 0;	1174	return 0;
799	}	1175	}
800		1176
801	/*****************************************************************************/	1177	/*****************************************************************************/
802		1178
803	static void atfork_prepare (void)	1179	static void atfork_prepare (void)
804	{	1180	{
805	pthread_mutex_lock (&reqlock);	1181	LOCK (wrklock);
806	pthread_mutex_lock (&reslock);	1182	LOCK (reqlock);
		1183	LOCK (reslock);
807	#if !HAVE_PREADWRITE	1184	#if !HAVE_PREADWRITE
808	pthread_mutex_lock (&preadwritelock);	1185	LOCK (preadwritelock);
809	#endif	1186	#endif
810	#if !HAVE_READDIR_R	1187	#if !HAVE_READDIR_R
811	pthread_mutex_lock (&readdirlock);	1188	LOCK (readdirlock);
812	#endif	1189	#endif
813	}	1190	}
814		1191
815	static void atfork_parent (void)	1192	static void atfork_parent (void)
816	{	1193	{
817	#if !HAVE_READDIR_R	1194	#if !HAVE_READDIR_R
818	pthread_mutex_unlock (&readdirlock);	1195	UNLOCK (readdirlock);
819	#endif	1196	#endif
820	#if !HAVE_PREADWRITE	1197	#if !HAVE_PREADWRITE
821	pthread_mutex_unlock (&preadwritelock);	1198	UNLOCK (preadwritelock);
822	#endif	1199	#endif
823	pthread_mutex_unlock (&reslock);	1200	UNLOCK (reslock);
824	pthread_mutex_unlock (&reqlock);	1201	UNLOCK (reqlock);
		1202	UNLOCK (wrklock);
825	}	1203	}
826		1204
827	static void atfork_child (void)	1205	static void atfork_child (void)
828	{	1206	{
829	aio_req prv;	1207	aio_req prv;
830		1208
831	started = 0;	1209	while (prv = reqq_shift (&req_queue))
		1210	req_free (prv);
832		1211
833	while (reqs)	1212	while (prv = reqq_shift (&res_queue))
		1213	req_free (prv);
		1214
		1215	while (wrk_first.next != &wrk_first)
834	{	1216	{
835	prv = reqs;	1217	worker *wrk = wrk_first.next;
836	reqs = prv->next;	1218
		1219	if (wrk->req)
		1220	req_free (wrk->req);
		1221
		1222	worker_clear (wrk);
837	req_free (prv);	1223	worker_free (wrk);
838	}	1224	}
839		1225
840	reqs = reqe = 0;	1226	started = 0;
841		1227	idle = 0;
842	while (ress)	1228	nreqs = 0;
843	{	1229	nready = 0;
844	prv = ress;	1230	npending = 0;
845	ress = prv->next;
846	req_free (prv);
847	}
848
849	ress = rese = 0;
850		1231
851	close (respipe [0]);	1232	close (respipe [0]);
852	close (respipe [1]);	1233	close (respipe [1]);
853	create_pipe ();	1234	create_pipe ();
854		1235
855	atfork_parent ();	1236	atfork_parent ();
856	}	1237	}
857		1238
858	#define dREQ \	1239	#define dREQ \
859	aio_req req; \	1240	aio_req req; \
		1241	int req_pri = next_pri; \
		1242	next_pri = DEFAULT_PRI + PRI_BIAS; \
860	\	1243	\
861	if (SvOK (callback) && !SvROK (callback)) \	1244	if (SvOK (callback) && !SvROK (callback)) \
862	croak ("callback must be undef or of reference type"); \	1245	croak ("callback must be undef or of reference type"); \
863	\	1246	\
864	Newz (0, req, 1, aio_cb); \	1247	Newz (0, req, 1, aio_cb); \
865	if (!req) \	1248	if (!req) \
866	croak ("out of memory during aio_req allocation"); \	1249	croak ("out of memory during aio_req allocation"); \
867	\	1250	\
868	req->callback = newSVsv (callback)	1251	req->callback = newSVsv (callback); \
		1252	req->pri = req_pri
869		1253
870	#define REQ_SEND \	1254	#define REQ_SEND \
871	req_send (req); \	1255	req_send (req); \
872	\	1256	\
873	if (GIMME_V != G_VOID) \	1257	if (GIMME_V != G_VOID) \
…		…
878	PROTOTYPES: ENABLE	1262	PROTOTYPES: ENABLE
879		1263
880	BOOT:	1264	BOOT:
881	{	1265	{
882	HV *stash = gv_stashpv ("IO::AIO", 1);	1266	HV *stash = gv_stashpv ("IO::AIO", 1);
		1267
883	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1270	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1271	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1272	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1273	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
886		1274
887	create_pipe ();	1275	create_pipe ();
888	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
889	}	1277	}
890		1278
891	void	1279	void
892	min_parallel (nthreads)	1280	max_poll_reqs (int nreqs)
893	int nthreads
894	PROTOTYPE: $	1281	PROTOTYPE: $
		1282	CODE:
		1283	max_poll_reqs = nreqs;
895		1284
896	void	1285	void
897	max_parallel (nthreads)	1286	max_poll_time (double nseconds)
898	int nthreads
899	PROTOTYPE: $	1287	PROTOTYPE: $
		1288	CODE:
		1289	max_poll_time = nseconds * AIO_TICKS;
		1290
		1291	void
		1292	min_parallel (int nthreads)
		1293	PROTOTYPE: $
		1294
		1295	void
		1296	max_parallel (int nthreads)
		1297	PROTOTYPE: $
		1298
		1299	void
		1300	max_idle (int nthreads)
		1301	PROTOTYPE: $
		1302	CODE:
		1303	set_max_idle (nthreads);
900		1304
901	int	1305	int
902	max_outstanding (nreqs)	1306	max_outstanding (int maxreqs)
903	int nreqs	1307	PROTOTYPE: $
904	PROTOTYPE: $
905	CODE:	1308	CODE:
906	RETVAL = max_outstanding;	1309	RETVAL = max_outstanding;
907	max_outstanding = nreqs;	1310	max_outstanding = maxreqs;
		1311	OUTPUT:
		1312	RETVAL
908		1313
909	void	1314	void
910	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
911	SV * pathname	1316	SV8 * pathname
912	int flags	1317	int flags
913	int mode	1318	int mode
914	SV * callback	1319	SV * callback
915	PROTOTYPE: $$$;$	1320	PROTOTYPE: $$$;$
916	PPCODE:	1321	PPCODE:
917	{	1322	{
918	dREQ;	1323	dREQ;
919		1324
920	req->type = REQ_OPEN;	1325	req->type = REQ_OPEN;
921	req->data = newSVsv (pathname);	1326	req->sv1 = newSVsv (pathname);
922	req->dataptr = SvPVbyte_nolen (req->data);	1327	req->ptr1 = SvPVbyte_nolen (req->sv1);
923	req->fd = flags;	1328	req->int1 = flags;
924	req->mode = mode;	1329	req->mode = mode;
925		1330
926	REQ_SEND;	1331	REQ_SEND;
927	}	1332	}
928		1333
…		…
938	PPCODE:	1343	PPCODE:
939	{	1344	{
940	dREQ;	1345	dREQ;
941		1346
942	req->type = ix;	1347	req->type = ix;
943	req->fh = newSVsv (fh);	1348	req->fh = newSVsv (fh);
944	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
945		1350
946	REQ_SEND (req);	1351	REQ_SEND (req);
947	}	1352	}
948		1353
949	void	1354	void
950	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
951	SV * fh	1356	SV * fh
952	UV offset	1357	UV offset
953	UV length	1358	UV length
954	SV * data	1359	SV8 * data
955	UV dataoffset	1360	UV dataoffset
956	SV * callback	1361	SV * callback
957	ALIAS:	1362	ALIAS:
958	aio_read = REQ_READ	1363	aio_read = REQ_READ
959	aio_write = REQ_WRITE	1364	aio_write = REQ_WRITE
960	PROTOTYPE: $$$$$;$	1365	PROTOTYPE: $$$$$;$
961	PPCODE:	1366	PPCODE:
962	{	1367	{
963	aio_req req;
964	STRLEN svlen;	1368	STRLEN svlen;
965	char *svptr = SvPVbyte (data, svlen);	1369	char *svptr = SvPVbyte (data, svlen);
966		1370
967	SvUPGRADE (data, SVt_PV);	1371	SvUPGRADE (data, SVt_PV);
968	SvPOK_on (data);	1372	SvPOK_on (data);
…		…
990		1394
991	{	1395	{
992	dREQ;	1396	dREQ;
993		1397
994	req->type = ix;	1398	req->type = ix;
995	req->fh = newSVsv (fh);	1399	req->fh = newSVsv (fh);
996	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
997	: IoOFP (sv_2io (fh)));	1401	: IoOFP (sv_2io (fh)));
998	req->offset = offset;	1402	req->offs = offset;
999	req->length = length;	1403	req->size = length;
1000	req->data = SvREFCNT_inc (data);	1404	req->sv1 = SvREFCNT_inc (data);
1001	req->dataptr = (char *)svptr + dataoffset;	1405	req->ptr1 = (char *)svptr + dataoffset;
		1406	req->stroffset = dataoffset;
1002		1407
1003	if (!SvREADONLY (data))	1408	if (!SvREADONLY (data))
1004	{	1409	{
1005	SvREADONLY_on (data);	1410	SvREADONLY_on (data);
1006	req->data2ptr = (void *)data;	1411	req->flags |= FLAG_SV1_RO_OFF;
1007	}	1412	}
1008		1413
1009	REQ_SEND;	1414	REQ_SEND;
1010	}	1415	}
		1416	}
		1417
		1418	void
		1419	aio_readlink (path,callback=&PL_sv_undef)
		1420	SV8 * path
		1421	SV * callback
		1422	PROTOTYPE: $$;$
		1423	PPCODE:
		1424	{
		1425	SV *data;
		1426	dREQ;
		1427
		1428	data = newSV (NAME_MAX);
		1429	SvPOK_on (data);
		1430
		1431	req->type = REQ_READLINK;
		1432	req->fh = newSVsv (path);
		1433	req->ptr2 = SvPVbyte_nolen (req->fh);
		1434	req->sv1 = data;
		1435	req->ptr1 = SvPVbyte_nolen (data);
		1436
		1437	REQ_SEND;
1011	}	1438	}
1012		1439
1013	void	1440	void
1014	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1441	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1015	SV * out_fh	1442	SV * out_fh
…		…
1021	PPCODE:	1448	PPCODE:
1022	{	1449	{
1023	dREQ;	1450	dREQ;
1024		1451
1025	req->type = REQ_SENDFILE;	1452	req->type = REQ_SENDFILE;
1026	req->fh = newSVsv (out_fh);	1453	req->fh = newSVsv (out_fh);
1027	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1028	req->fh2 = newSVsv (in_fh);	1455	req->sv2 = newSVsv (in_fh);
1029	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1030	req->offset = in_offset;	1457	req->offs = in_offset;
1031	req->length = length;	1458	req->size = length;
1032		1459
1033	REQ_SEND;	1460	REQ_SEND;
1034	}	1461	}
1035		1462
1036	void	1463	void
…		…
1043	PPCODE:	1470	PPCODE:
1044	{	1471	{
1045	dREQ;	1472	dREQ;
1046		1473
1047	req->type = REQ_READAHEAD;	1474	req->type = REQ_READAHEAD;
1048	req->fh = newSVsv (fh);	1475	req->fh = newSVsv (fh);
1049	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1050	req->offset = offset;	1477	req->offs = offset;
1051	req->length = length;	1478	req->size = length;
1052		1479
1053	REQ_SEND;	1480	REQ_SEND;
1054	}	1481	}
1055		1482
1056	void	1483	void
1057	aio_stat (fh_or_path,callback=&PL_sv_undef)	1484	aio_stat (fh_or_path,callback=&PL_sv_undef)
1058	SV * fh_or_path	1485	SV8 * fh_or_path
1059	SV * callback	1486	SV * callback
1060	ALIAS:	1487	ALIAS:
1061	aio_stat = REQ_STAT	1488	aio_stat = REQ_STAT
1062	aio_lstat = REQ_LSTAT	1489	aio_lstat = REQ_LSTAT
1063	PPCODE:	1490	PPCODE:
1064	{	1491	{
1065	dREQ;	1492	dREQ;
1066		1493
1067	New (0, req->statdata, 1, Stat_t);	1494	req->ptr2 = malloc (sizeof (Stat_t));
1068	if (!req->statdata)	1495	if (!req->ptr2)
1069	{	1496	{
1070	req_free (req);	1497	req_free (req);
1071	croak ("out of memory during aio_req->statdata allocation");	1498	croak ("out of memory during aio_stat statdata allocation");
1072	}	1499	}
		1500
		1501	req->flags |= FLAG_PTR2_FREE;
1073		1502
1074	if (SvPOK (fh_or_path))	1503	if (SvPOK (fh_or_path))
1075	{	1504	{
1076	req->type = ix;	1505	req->type = ix;
1077	req->data = newSVsv (fh_or_path);	1506	req->sv1 = newSVsv (fh_or_path);
1078	req->dataptr = SvPVbyte_nolen (req->data);	1507	req->ptr1 = SvPVbyte_nolen (req->sv1);
1079	}	1508	}
1080	else	1509	else
1081	{	1510	{
1082	req->type = REQ_FSTAT;	1511	req->type = REQ_FSTAT;
1083	req->fh = newSVsv (fh_or_path);	1512	req->fh = newSVsv (fh_or_path);
1084	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1085	}	1514	}
1086		1515
1087	REQ_SEND;	1516	REQ_SEND;
1088	}	1517	}
1089		1518
1090	void	1519	void
1091	aio_unlink (pathname,callback=&PL_sv_undef)	1520	aio_unlink (pathname,callback=&PL_sv_undef)
1092	SV * pathname	1521	SV8 * pathname
1093	SV * callback	1522	SV * callback
1094	ALIAS:	1523	ALIAS:
1095	aio_unlink = REQ_UNLINK	1524	aio_unlink = REQ_UNLINK
1096	aio_rmdir = REQ_RMDIR	1525	aio_rmdir = REQ_RMDIR
1097	aio_readdir = REQ_READDIR	1526	aio_readdir = REQ_READDIR
1098	PPCODE:	1527	PPCODE:
1099	{	1528	{
1100	dREQ;	1529	dREQ;
1101		1530
1102	req->type = ix;	1531	req->type = ix;
1103	req->data = newSVsv (pathname);	1532	req->sv1 = newSVsv (pathname);
1104	req->dataptr = SvPVbyte_nolen (req->data);	1533	req->ptr1 = SvPVbyte_nolen (req->sv1);
1105		1534
1106	REQ_SEND;	1535	REQ_SEND;
1107	}	1536	}
1108		1537
1109	void	1538	void
1110	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1111	SV * oldpath	1540	SV8 * oldpath
1112	SV * newpath	1541	SV8 * newpath
1113	SV * callback	1542	SV * callback
1114	ALIAS:	1543	ALIAS:
1115	aio_link = REQ_LINK	1544	aio_link = REQ_LINK
1116	aio_symlink = REQ_SYMLINK	1545	aio_symlink = REQ_SYMLINK
1117	aio_rename = REQ_RENAME	1546	aio_rename = REQ_RENAME
1118	PPCODE:	1547	PPCODE:
1119	{	1548	{
1120	dREQ;	1549	dREQ;
1121		1550
1122	req->type = ix;	1551	req->type = ix;
1123	req->fh = newSVsv (oldpath);	1552	req->fh = newSVsv (oldpath);
1124	req->data2ptr = SvPVbyte_nolen (req->fh);	1553	req->ptr2 = SvPVbyte_nolen (req->fh);
1125	req->data = newSVsv (newpath);	1554	req->sv1 = newSVsv (newpath);
1126	req->dataptr = SvPVbyte_nolen (req->data);	1555	req->ptr1 = SvPVbyte_nolen (req->sv1);
1127		1556
1128	REQ_SEND;	1557	REQ_SEND;
1129	}	1558	}
1130		1559
1131	void	1560	void
1132	aio_sleep (delay,callback=&PL_sv_undef)	1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1133	double delay	1562	SV8 * pathname
1134	SV * callback	1563	SV * callback
		1564	UV mode
		1565	UV dev
1135	PPCODE:	1566	PPCODE:
1136	{	1567	{
1137	dREQ;	1568	dREQ;
		1569
		1570	req->type = REQ_MKNOD;
		1571	req->sv1 = newSVsv (pathname);
		1572	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1573	req->mode = (mode_t)mode;
		1574	req->offs = dev;
		1575
		1576	REQ_SEND;
		1577	}
1138		1578
		1579	void
		1580	aio_busy (delay,callback=&PL_sv_undef)
		1581	double delay
		1582	SV * callback
		1583	PPCODE:
		1584	{
		1585	dREQ;
		1586
1139	req->type = REQ_SLEEP;	1587	req->type = REQ_BUSY;
1140	req->fd = delay < 0. ? 0 : delay;	1588	req->int1 = delay < 0. ? 0 : delay;
1141	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1142		1590
1143	REQ_SEND;	1591	REQ_SEND;
1144	}	1592	}
1145		1593
1146	void	1594	void
…		…
1148	SV * callback	1596	SV * callback
1149	PROTOTYPE: ;$	1597	PROTOTYPE: ;$
1150	PPCODE:	1598	PPCODE:
1151	{	1599	{
1152	dREQ;	1600	dREQ;
		1601
1153	req->type = REQ_GROUP;	1602	req->type = REQ_GROUP;
1154	req->grp_next = req;
1155	req->grp_prev = req;
1156		1603
1157	req_send (req);	1604	req_send (req);
1158	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1159	}	1606	}
		1607
		1608	void
		1609	aio_nop (callback=&PL_sv_undef)
		1610	SV * callback
		1611	PPCODE:
		1612	{
		1613	dREQ;
		1614
		1615	req->type = REQ_NOP;
		1616
		1617	REQ_SEND;
		1618	}
		1619
		1620	int
		1621	aioreq_pri (int pri = 0)
		1622	PROTOTYPE: ;$
		1623	CODE:
		1624	RETVAL = next_pri - PRI_BIAS;
		1625	if (items > 0)
		1626	{
		1627	if (pri < PRI_MIN) pri = PRI_MIN;
		1628	if (pri > PRI_MAX) pri = PRI_MAX;
		1629	next_pri = pri + PRI_BIAS;
		1630	}
		1631	OUTPUT:
		1632	RETVAL
		1633
		1634	void
		1635	aioreq_nice (int nice = 0)
		1636	CODE:
		1637	nice = next_pri - nice;
		1638	if (nice < PRI_MIN) nice = PRI_MIN;
		1639	if (nice > PRI_MAX) nice = PRI_MAX;
		1640	next_pri = nice + PRI_BIAS;
1160		1641
1161	void	1642	void
1162	flush ()	1643	flush ()
1163	PROTOTYPE:	1644	PROTOTYPE:
1164	CODE:	1645	CODE:
1165	while (nreqs)	1646	while (nreqs)
1166	{	1647	{
1167	poll_wait ();	1648	poll_wait ();
1168	poll_cb ();	1649	poll_cb (0);
1169	}	1650	}
1170		1651
1171	void	1652	void
1172	poll()	1653	poll()
1173	PROTOTYPE:	1654	PROTOTYPE:
1174	CODE:	1655	CODE:
1175	if (nreqs)	1656	if (nreqs)
1176	{	1657	{
1177	poll_wait ();	1658	poll_wait ();
1178	poll_cb ();	1659	poll_cb (0);
1179	}	1660	}
1180		1661
1181	int	1662	int
1182	poll_fileno()	1663	poll_fileno()
1183	PROTOTYPE:	1664	PROTOTYPE:
…		…
1207	CODE:	1688	CODE:
1208	RETVAL = nreqs;	1689	RETVAL = nreqs;
1209	OUTPUT:	1690	OUTPUT:
1210	RETVAL	1691	RETVAL
1211		1692
1212	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1693	int
1213		1694	nready()
1214	void
1215	cancel (aio_req_ornot req)
1216	PROTOTYPE:	1695	PROTOTYPE:
1217	CODE:	1696	CODE:
		1697	RETVAL = get_nready ();
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
		1702	npending()
		1703	PROTOTYPE:
		1704	CODE:
		1705	RETVAL = get_npending ();
		1706	OUTPUT:
		1707	RETVAL
		1708
		1709	int
		1710	nthreads()
		1711	PROTOTYPE:
		1712	CODE:
		1713	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1714	RETVAL = started;
		1715	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	PROTOTYPES: DISABLE
		1720
		1721	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1722
		1723	void
		1724	cancel (aio_req_ornot req)
		1725	CODE:
1218	req_cancel (req);	1726	req_cancel (req);
1219		1727
		1728	void
		1729	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1730	CODE:
		1731	SvREFCNT_dec (req->callback);
		1732	req->callback = newSVsv (callback);
		1733
1220	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1734	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221		1735
1222	void	1736	void
1223	add (aio_req grp, ...)	1737	add (aio_req grp, ...)
1224	PROTOTYPE: $;@
1225	PPCODE:	1738	PPCODE:
1226	{	1739	{
1227	int i;	1740	int i;
		1741	aio_req req;
		1742
		1743	if (grp->int1 == 2)
		1744	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1228		1745
1229	for (i = 1; i < items; ++i )	1746	for (i = 1; i < items; ++i )
1230	{	1747	{
1231	if (GIMME_V != G_VOID)	1748	if (GIMME_V != G_VOID)
1232	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1749	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233		1750
1234	aio_req req = SvAIO_REQ (ST (i));	1751	req = SvAIO_REQ (ST (i));
1235	printf ("req = %p\n", req);//D
1236		1752
1237	if (req)	1753	if (req)
1238	{	1754	{
1239	req->grp_prev = grp;	1755	++grp->size;
1240	req->grp_next = grp->grp_next;
1241	grp->grp_next->grp_prev = req;
1242	grp->grp_next = req;
1243
1244	req->grp = grp;	1756	req->grp = grp;
		1757
		1758	req->grp_prev = 0;
		1759	req->grp_next = grp->grp_first;
		1760
		1761	if (grp->grp_first)
		1762	grp->grp_first->grp_prev = req;
		1763
		1764	grp->grp_first = req;
1245	}	1765	}
1246	}	1766	}
1247	}	1767	}
1248		1768
		1769	void
		1770	cancel_subs (aio_req_ornot req)
		1771	CODE:
		1772	req_cancel_subs (req);
		1773
		1774	void
		1775	result (aio_req grp, ...)
		1776	CODE:
		1777	{
		1778	int i;
		1779	AV *av;
		1780
		1781	grp->errorno = errno;
		1782
		1783	av = newAV ();
		1784
		1785	for (i = 1; i < items; ++i )
		1786	av_push (av, newSVsv (ST (i)));
		1787
		1788	SvREFCNT_dec (grp->sv1);
		1789	grp->sv1 = (SV *)av;
		1790	}
		1791
		1792	void
		1793	errno (aio_req grp, int errorno = errno)
		1794	CODE:
		1795	grp->errorno = errorno;
		1796
		1797	void
		1798	limit (aio_req grp, int limit)
		1799	CODE:
		1800	grp->int2 = limit;
		1801	aio_grp_feed (grp);
		1802
		1803	void
		1804	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1805	CODE:
		1806	{
		1807	SvREFCNT_dec (grp->sv2);
		1808	grp->sv2 = newSVsv (callback);
		1809
		1810	if (grp->int2 <= 0)
		1811	grp->int2 = 2;
		1812
		1813	aio_grp_feed (grp);
		1814	}
		1815

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