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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 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	typedef aio_cb *aio_group;
94		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
95	static int started, wanted;	167	static unsigned int started, idle, wanted;
96	static volatile int nreqs;	168
97	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;
98	static int respipe [2];	221	static int respipe [2];
99		222
100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
103		226
104	static volatile aio_req reqs, reqe; /* queue start, queue end */	227	#if WORDACCESS_UNSAFE
105	static volatile aio_req ress, rese; /* queue start, queue end */
106		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);
107	static void req_free (aio_req req);	326	static void req_free (aio_req req);
		327	static void req_cancel (aio_req req);
108		328
109	/* must be called at most once */	329	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	330	static SV *req_sv (aio_req req, const char *klass)
111	{	331	{
		332	if (!req->self)
		333	{
112	req->self = (SV *)newHV ();	334	req->self = (SV *)newHV ();
113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	335	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		336	}
114		337
115	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)));
116	}	339	}
117		340
118	static aio_req SvAIO_REQ (SV *sv)	341	static aio_req SvAIO_REQ (SV *sv)
119	{	342	{
		343	MAGIC *mg;
		344
120	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	345	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121	croak ("object of class " AIO_REQ_KLASS " expected");	346	croak ("object of class " AIO_REQ_KLASS " expected");
122		347
123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	348	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124		349
125	return mg ? (aio_req)mg->mg_ptr : 0;	350	return mg ? (aio_req)mg->mg_ptr : 0;
126	}	351	}
127		352
128	static void poll_wait ()	353	static void aio_grp_feed (aio_req grp)
129	{	354	{
130	if (nreqs && !ress)	355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
131	{	356	{
132	fd_set rfd;	357	int old_len = grp->size;
133	FD_ZERO(&rfd);
134	FD_SET(respipe [0], &rfd);
135		358
136	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	}
137	}	381	}
138	}	382	}
139		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
140	static void req_invoke (aio_req req)	399	static void req_invoke (aio_req req)
141	{	400	{
142	dSP;	401	dSP;
143	int errorno = errno;
144		402
145	if (req->cancelled || !SvOK (req->callback))	403	if (req->flags & FLAG_SV1_RO_OFF)
146	return;	404	SvREADONLY_off (req->sv1);
147		405
148	errno = req->errorno;	406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
149
150	ENTER;
151	PUSHMARK (SP);
152
153	switch (req->type)
154	{	407	{
155	case REQ_READDIR:	408	ENTER;
		409	SAVETMPS;
		410	PUSHMARK (SP);
		411	EXTEND (SP, 1);
		412
		413	switch (req->type)
156	{	414	{
157	SV *rv = &PL_sv_undef;	415	case REQ_READDIR:
158
159	if (req->result >= 0)
160	{	416	{
161	char *buf = req->data2ptr;	417	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		418
164	while (req->result)	419	if (req->result >= 0)
165	{	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	{
166	SV *sv = newSVpv (buf, 0);	429	SV *sv = newSVpv (buf, 0);
167		430
168	av_push (av, sv);	431	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	432	buf += SvCUR (sv) + 1;
170	req->result--;	433	}
		434
		435	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	436	}
172		437
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	438	PUSHs (rv);
174	}	439	}
		440	break;
175		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;
176	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;
177	}	504	}
178	break;
179		505
180	case REQ_OPEN:	506	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		507
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	508	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	509	call_sv (req->callback, G_VOID | G_EVAL);
188	SPAGAIN;	510	SPAGAIN;
189		511
190	fh = SvREFCNT_inc (POPs);	512	FREETMPS;
191		513	LEAVE;
192	PUSHMARK (SP);
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_SLEEP:
198	case REQ_GROUP:
199	break;
200
201	default:
202	XPUSHs (sv_2mortal (newSViv (req->result)));
203	break;
204	}	514	}
205		515
		516	if (req->grp)
		517	{
		518	aio_req grp = req->grp;
206		519
207	PUTBACK;	520	/* unlink request */
208	call_sv (req->callback, G_VOID | G_EVAL);	521	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
209	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	}
210		529
211	if (SvTRUE (ERRSV))	530	if (SvTRUE (ERRSV))
212	{	531	{
213	req_free (req);	532	req_free (req);
214	croak (0);	533	croak (0);
215	}	534	}
216
217	LEAVE;
218
219	errno = errorno;
220	}	535	}
221		536
222	static void req_free (aio_req req)	537	static void req_free (aio_req req)
223	{	538	{
224	if (req->grp)
225	{
226	aio_req grp = req->grp;
227
228	/* unlink request */
229	req->grp_next->grp_prev = req->grp_prev;
230	req->grp_prev->grp_next = req->grp_next;
231
232	if (grp->grp_next == grp)
233	{
234	req_invoke (grp);
235	req_free (grp);
236	}
237	}
238
239	if (req->self)	539	if (req->self)
240	{	540	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);	541	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);	542	SvREFCNT_dec (req->self);
243	}	543	}
244		544
245	if (req->data)
246	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);	545	SvREFCNT_dec (req->fh);
250		546	SvREFCNT_dec (req->sv1);
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);	547	SvREFCNT_dec (req->sv2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);	548	SvREFCNT_dec (req->callback);
259		549
260	if (req->type == REQ_READDIR && req->result >= 0)	550	if (req->flags & FLAG_PTR2_FREE)
261	free (req->data2ptr);	551	free (req->ptr2);
262		552
263	Safefree (req);	553	Safefree (req);
264	}	554	}
265		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
266	static void req_cancel (aio_req req)	570	static void req_cancel (aio_req req)
267	{	571	{
268	req->cancelled = 1;	572	req->flags |= FLAG_CANCELLED;
269		573
270	if (req->type == REQ_GROUP)	574	req_cancel_subs (req);
271	{
272	aio_req sub;
273
274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
275	req_cancel (sub);
276	}
277	}
278
279	static int poll_cb ()
280	{
281	dSP;
282	int count = 0;
283	int do_croak = 0;
284	aio_req req;
285
286	for (;;)
287	{
288	pthread_mutex_lock (&reslock);
289	req = ress;
290
291	if (req)
292	{
293	ress = req->next;
294
295	if (!ress)
296	{
297	/* read any signals sent by the worker threads */
298	char buf [32];
299	while (read (respipe [0], buf, 32) == 32)
300	;
301
302	rese = 0;
303	}
304	}
305
306	pthread_mutex_unlock (&reslock);
307
308	if (!req)
309	break;
310
311	nreqs--;
312
313	if (req->type == REQ_QUIT)
314	started--;
315	else if (req->type == REQ_GROUP && req->grp_next != req)
316	continue;
317	else
318	{
319	if (req->type == REQ_READ)
320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
321
322	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323	SvREADONLY_off (req->data);
324
325	if (req->statdata)
326	{
327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
328	PL_laststatval = req->result;
329	PL_statcache = *(req->statdata);
330	}
331
332	req_invoke (req);
333
334	count++;
335	}
336
337	req_free (req);
338	}
339
340	return count;
341	}	575	}
342		576
343	static void *aio_proc(void *arg);	577	static void *aio_proc(void *arg);
344		578
345	static void start_thread (void)	579	static void start_thread (void)
346	{	580	{
347	sigset_t fullsigset, oldsigset;	581	sigset_t fullsigset, oldsigset;
348	pthread_t tid;
349	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");
350		588
351	pthread_attr_init (&attr);	589	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);	590	pthread_attr_setstacksize (&attr, STACKSIZE);
353	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
354		595
355	sigfillset (&fullsigset);	596	sigfillset (&fullsigset);
		597
		598	LOCK (wrklock);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357		600
358	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
359	started++;
360
361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
362	}
363
364	static void req_send (aio_req req)
365	{
366	while (started < wanted && nreqs >= started)
367	start_thread ();
368
369	nreqs++;
370
371	pthread_mutex_lock (&reqlock);
372
373	req->next = 0;
374
375	if (reqe)
376	{	602	{
377	reqe->next = req;	603	wrk->prev = &wrk_first;
378	reqe = req;	604	wrk->next = wrk_first.next;
		605	wrk_first.next->prev = wrk;
		606	wrk_first.next = wrk;
		607	++started;
379	}	608	}
380	else	609	else
381	reqe = reqs = req;	610	free (wrk);
382		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);
383	pthread_cond_signal (&reqwait);	635	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);	636	UNLOCK (reqlock);
385		637
386	if (nreqs > max_outstanding)	638	maybe_start_thread ();
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}	639	}
397		640
398	static void end_thread (void)	641	static void end_thread (void)
399	{	642	{
400	aio_req req;	643	aio_req req;
		644
401	Newz (0, req, 1, aio_cb);	645	Newz (0, req, 1, aio_cb);
		646
402	req->type = REQ_QUIT;	647	req->type = REQ_QUIT;
		648	req->pri = PRI_MAX + PRI_BIAS;
403		649
404	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);
405	}	665	}
406		666
407	static void min_parallel (int nthreads)	667	static void min_parallel (int nthreads)
408	{	668	{
409	if (wanted < nthreads)	669	if (wanted < nthreads)
410	wanted = nthreads;	670	wanted = nthreads;
411	}	671	}
412		672
413	static void max_parallel (int nthreads)	673	static void max_parallel (int nthreads)
414	{	674	{
415	int cur = started;
416
417	if (wanted > nthreads)	675	if (wanted > nthreads)
418	wanted = nthreads;	676	wanted = nthreads;
419		677
420	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)
421	{	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
422	end_thread ();	696	maybe_start_thread ();
423	cur--;	697
		698	FD_ZERO(&rfd);
		699	FD_SET(respipe [0], &rfd);
		700
		701	select (respipe [0] + 1, &rfd, 0, 0, 0);
424	}	702	}
		703	}
425		704
426	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 (;;)
427	{	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
428	poll_wait ();	775	poll_wait ();
429	poll_cb ();	776
		777	++maxreqs;
430	}	778	}
		779
		780	return count;
431	}	781	}
432		782
433	static void create_pipe ()	783	static void create_pipe ()
434	{	784	{
435	if (pipe (respipe))	785	if (pipe (respipe))
…		…
459	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)
460	{	810	{
461	ssize_t res;	811	ssize_t res;
462	off_t ooffset;	812	off_t ooffset;
463		813
464	pthread_mutex_lock (&preadwritelock);	814	LOCK (preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);	815	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);	816	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);	817	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);	818	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);	819	UNLOCK (preadwritelock);
470		820
471	return res;	821	return res;
472	}	822	}
473		823
474	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)
475	{	825	{
476	ssize_t res;	826	ssize_t res;
477	off_t ooffset;	827	off_t ooffset;
478		828
479	pthread_mutex_lock (&preadwritelock);	829	LOCK (preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);	830	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);	831	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);	832	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);	833	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);	834	UNLOCK (preadwritelock);
485		835
486	return res;	836	return res;
487	}	837	}
488	#endif	838	#endif
489		839
490	#if !HAVE_FDATASYNC	840	#if !HAVE_FDATASYNC
491	# define fdatasync fsync	841	# define fdatasync fsync
492	#endif	842	#endif
493		843
494	#if !HAVE_READAHEAD	844	#if !HAVE_READAHEAD
495	# define readahead aio_readahead	845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
496		846
497	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)
498	{	848	{
499	char readahead_buf[4096];	849	dBUF;
500		850
501	while (count > 0)	851	while (count > 0)
502	{	852	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
504		854
505	pread (fd, readahead_buf, len, offset);	855	pread (fd, aio_buf, len, offset);
506	offset += len;	856	offset += len;
507	count -= len;	857	count -= len;
508	}	858	}
509		859
510	errno = 0;	860	errno = 0;
511	}	861	}
		862
512	#endif	863	#endif
513		864
514	#if !HAVE_READDIR_R	865	#if !HAVE_READDIR_R
515	# define readdir_r aio_readdir_r	866	# define readdir_r aio_readdir_r
516		867
…		…
519	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)
520	{	871	{
521	struct dirent *e;	872	struct dirent *e;
522	int errorno;	873	int errorno;
523		874
524	pthread_mutex_lock (&readdirlock);	875	LOCK (readdirlock);
525		876
526	e = readdir (dirp);	877	e = readdir (dirp);
527	errorno = errno;	878	errorno = errno;
528		879
529	if (e)	880	if (e)
…		…
532	strcpy (ent->d_name, e->d_name);	883	strcpy (ent->d_name, e->d_name);
533	}	884	}
534	else	885	else
535	*res = 0;	886	*res = 0;
536		887
537	pthread_mutex_unlock (&readdirlock);	888	UNLOCK (readdirlock);
538		889
539	errno = errorno;	890	errno = errorno;
540	return e ? 0 : -1;	891	return e ? 0 : -1;
541	}	892	}
542	#endif	893	#endif
543		894
544	/* sendfile always needs emulation */	895	/* sendfile always needs emulation */
545	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)
546	{	897	{
547	ssize_t res;	898	ssize_t res;
548		899
549	if (!count)	900	if (!count)
550	return 0;	901	return 0;
…		…
561	{	912	{
562	off_t sbytes;	913	off_t sbytes;
563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	914	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564		915
565	if (res < 0 && sbytes)	916	if (res < 0 && sbytes)
566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	917	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
567	res = sbytes;	918	res = sbytes;
568	}	919	}
569		920
570	# elif __hpux	921	# elif __hpux
571	res = sendfile (ofd, ifd, offset, count, 0, 0);	922	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
599	#endif	950	#endif
600	)	951	)
601	)	952	)
602	{	953	{
603	/* emulate sendfile. this is a major pain in the ass */	954	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];	955	dBUF;
		956
605	res = 0;	957	res = 0;
606		958
607	while (count)	959	while (count)
608	{	960	{
609	ssize_t cnt;	961	ssize_t cnt;
610		962
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	963	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
612		964
613	if (cnt <= 0)	965	if (cnt <= 0)
614	{	966	{
615	if (cnt && !res) res = -1;	967	if (cnt && !res) res = -1;
616	break;	968	break;
617	}	969	}
618		970
619	cnt = write (ofd, buf, cnt);	971	cnt = write (ofd, aio_buf, cnt);
620		972
621	if (cnt <= 0)	973	if (cnt <= 0)
622	{	974	{
623	if (cnt && !res) res = -1;	975	if (cnt && !res) res = -1;
624	break;	976	break;
…		…
632		984
633	return res;	985	return res;
634	}	986	}
635		987
636	/* read a full directory */	988	/* read a full directory */
637	static int scandir_ (const char *path, void **namesp)	989	static void scandir_ (aio_req req, worker *self)
638	{	990	{
639	DIR *dirp = opendir (path);	991	DIR *dirp;
640	union	992	union
641	{	993	{
642	struct dirent d;	994	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;	996	} *u;
645	struct dirent *entp;	997	struct dirent *entp;
646	char *name, *names;	998	char *name, *names;
647	int memlen = 4096;	999	int memlen = 4096;
648	int memofs = 0;	1000	int memofs = 0;
649	int res = 0;	1001	int res = 0;
650	int errorno;	1002	int errorno;
651		1003
652	if (!dirp)	1004	LOCK (wrklock);
653	return -1;	1005	self->dirp = dirp = opendir (req->ptr1);
654		1006	self->dbuf = u = malloc (sizeof (*u));
		1007	req->flags |= FLAG_PTR2_FREE;
655	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);
656		1061
657	for (;;)	1062	for (;;)
658	{	1063	{
659	errno = 0, readdir_r (dirp, &u.d, &entp);	1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;
660		1065
661	if (!entp)	1066	LOCK (reqlock);
662	break;
663
664	name = entp->d_name;
665
666	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667	{
668	int len = strlen (name) + 1;
669
670	res++;
671
672	while (memofs + len > memlen)
673	{
674	memlen *= 2;
675	names = realloc (names, memlen);
676	if (!names)
677	break;
678	}
679
680	memcpy (names + memofs, name, len);
681	memofs += len;
682	}
683	}
684
685	errorno = errno;
686	closedir (dirp);
687
688	if (errorno)
689	{
690	free (names);
691	errno = errorno;
692	res = -1;
693	}
694
695	*namesp = (void *)names;
696	return res;
697	}
698
699	/*****************************************************************************/
700
701	static void *aio_proc (void *thr_arg)
702	{
703	aio_req req;
704	int type;
705
706	do
707	{
708	pthread_mutex_lock (&reqlock);
709		1067
710	for (;;)	1068	for (;;)
711	{	1069	{
712	req = reqs;	1070	self->req = req = reqq_shift (&req_queue);
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719		1071
720	if (req)	1072	if (req)
721	break;	1073	break;
722		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 */
723	pthread_cond_wait (&reqwait, &reqlock);	1091	pthread_cond_wait (&reqwait, &reqlock);
		1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1093	}
		1094
		1095	--idle;
724	}	1096	}
725		1097
726	pthread_mutex_unlock (&reqlock);	1098	--nready;
		1099
		1100	UNLOCK (reqlock);
727		1101
728	errno = 0; /* strictly unnecessary */	1102	errno = 0; /* strictly unnecessary */
729		1103
730	if (!req->cancelled)	1104	if (!(req->flags & FLAG_CANCELLED))
731	switch (req->type)	1105	switch (req->type)
732	{	1106	{
733	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;
734	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;
735		1109
736	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;
737	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;
738		1112
739	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;
740	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;
741	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;
742		1116
743	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;
744	case REQ_CLOSE: req->result = close (req->fd); break;	1118	case REQ_CLOSE: req->result = close (req->int1); break;
745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
746	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
747	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
749	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;
750		1126
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;	1128	case REQ_FSYNC: req->result = fsync (req->int1); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1129	case REQ_READDIR: scandir_ (req, self); break;
754		1130
755	case REQ_SLEEP:	1131	case REQ_BUSY:
756	{	1132	{
757	struct timeval tv;	1133	struct timeval tv;
758		1134
759	tv.tv_sec = req->fd;	1135	tv.tv_sec = req->int1;
760	tv.tv_usec = req->fd2;	1136	tv.tv_usec = req->int2;
761		1137
762	req->result = select (0, 0, 0, 0, &tv);	1138	req->result = select (0, 0, 0, 0, &tv);
763	}	1139	}
764		1140
		1141	case REQ_GROUP:
		1142	case REQ_NOP:
		1143	break;
		1144
765	case REQ_QUIT:	1145	case REQ_QUIT:
766	break;	1146	goto quit;
767		1147
768	default:	1148	default:
769	req->result = ENOSYS;	1149	req->result = ENOSYS;
770	break;	1150	break;
771	}	1151	}
772		1152
773	req->errorno = errno;	1153	req->errorno = errno;
774		1154
775	pthread_mutex_lock (&reslock);	1155	LOCK (reslock);
776		1156
777	req->next = 0;	1157	++npending;
778		1158
779	if (rese)	1159	if (!reqq_push (&res_queue, req))
780	{
781	rese->next = req;
782	rese = req;
783	}
784	else
785	{
786	rese = ress = req;
787
788	/* write a dummy byte to the pipe so fh becomes ready */	1160	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);	1161	write (respipe [1], &respipe, 1);
790	}
791		1162
792	pthread_mutex_unlock (&reslock);	1163	self->req = 0;
		1164	worker_clear (self);
		1165
		1166	UNLOCK (reslock);
793	}	1167	}
794	while (type != REQ_QUIT);	1168
		1169	quit:
		1170	LOCK (wrklock);
		1171	worker_free (self);
		1172	UNLOCK (wrklock);
795		1173
796	return 0;	1174	return 0;
797	}	1175	}
798		1176
799	/*****************************************************************************/	1177	/*****************************************************************************/
800		1178
801	static void atfork_prepare (void)	1179	static void atfork_prepare (void)
802	{	1180	{
803	pthread_mutex_lock (&reqlock);	1181	LOCK (wrklock);
804	pthread_mutex_lock (&reslock);	1182	LOCK (reqlock);
		1183	LOCK (reslock);
805	#if !HAVE_PREADWRITE	1184	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);	1185	LOCK (preadwritelock);
807	#endif	1186	#endif
808	#if !HAVE_READDIR_R	1187	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);	1188	LOCK (readdirlock);
810	#endif	1189	#endif
811	}	1190	}
812		1191
813	static void atfork_parent (void)	1192	static void atfork_parent (void)
814	{	1193	{
815	#if !HAVE_READDIR_R	1194	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);	1195	UNLOCK (readdirlock);
817	#endif	1196	#endif
818	#if !HAVE_PREADWRITE	1197	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);	1198	UNLOCK (preadwritelock);
820	#endif	1199	#endif
821	pthread_mutex_unlock (&reslock);	1200	UNLOCK (reslock);
822	pthread_mutex_unlock (&reqlock);	1201	UNLOCK (reqlock);
		1202	UNLOCK (wrklock);
823	}	1203	}
824		1204
825	static void atfork_child (void)	1205	static void atfork_child (void)
826	{	1206	{
827	aio_req prv;	1207	aio_req prv;
828		1208
829	started = 0;	1209	while (prv = reqq_shift (&req_queue))
		1210	req_free (prv);
830		1211
831	while (reqs)	1212	while (prv = reqq_shift (&res_queue))
		1213	req_free (prv);
		1214
		1215	while (wrk_first.next != &wrk_first)
832	{	1216	{
833	prv = reqs;	1217	worker *wrk = wrk_first.next;
834	reqs = prv->next;	1218
		1219	if (wrk->req)
		1220	req_free (wrk->req);
		1221
		1222	worker_clear (wrk);
835	req_free (prv);	1223	worker_free (wrk);
836	}	1224	}
837		1225
838	reqs = reqe = 0;	1226	started = 0;
839		1227	idle = 0;
840	while (ress)	1228	nreqs = 0;
841	{	1229	nready = 0;
842	prv = ress;	1230	npending = 0;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848		1231
849	close (respipe [0]);	1232	close (respipe [0]);
850	close (respipe [1]);	1233	close (respipe [1]);
851	create_pipe ();	1234	create_pipe ();
852		1235
853	atfork_parent ();	1236	atfork_parent ();
854	}	1237	}
855		1238
856	#define dREQ \	1239	#define dREQ \
857	aio_req req; \	1240	aio_req req; \
		1241	int req_pri = next_pri; \
		1242	next_pri = DEFAULT_PRI + PRI_BIAS; \
858	\	1243	\
859	if (SvOK (callback) && !SvROK (callback)) \	1244	if (SvOK (callback) && !SvROK (callback)) \
860	croak ("callback must be undef or of reference type"); \	1245	croak ("callback must be undef or of reference type"); \
861	\	1246	\
862	Newz (0, req, 1, aio_cb); \	1247	Newz (0, req, 1, aio_cb); \
863	if (!req) \	1248	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	1249	croak ("out of memory during aio_req allocation"); \
865	\	1250	\
866	req->callback = newSVsv (callback)	1251	req->callback = newSVsv (callback); \
		1252	req->pri = req_pri
867		1253
868	#define REQ_SEND \	1254	#define REQ_SEND \
869	req_send (req); \	1255	req_send (req); \
870	\	1256	\
871	if (GIMME_V != G_VOID) \	1257	if (GIMME_V != G_VOID) \
…		…
876	PROTOTYPES: ENABLE	1262	PROTOTYPES: ENABLE
877		1263
878	BOOT:	1264	BOOT:
879	{	1265	{
880	HV *stash = gv_stashpv ("IO::AIO", 1);	1266	HV *stash = gv_stashpv ("IO::AIO", 1);
		1267
881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883	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));
884		1274
885	create_pipe ();	1275	create_pipe ();
886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
887	}	1277	}
888		1278
889	void	1279	void
890	min_parallel (nthreads)	1280	max_poll_reqs (int nreqs)
891	int nthreads
892	PROTOTYPE: $	1281	PROTOTYPE: $
		1282	CODE:
		1283	max_poll_reqs = nreqs;
893		1284
894	void	1285	void
895	max_parallel (nthreads)	1286	max_poll_time (double nseconds)
896	int nthreads
897	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);
898		1304
899	int	1305	int
900	max_outstanding (nreqs)	1306	max_outstanding (int maxreqs)
901	int nreqs	1307	PROTOTYPE: $
902	PROTOTYPE: $
903	CODE:	1308	CODE:
904	RETVAL = max_outstanding;	1309	RETVAL = max_outstanding;
905	max_outstanding = nreqs;	1310	max_outstanding = maxreqs;
		1311	OUTPUT:
		1312	RETVAL
906		1313
907	void	1314	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
909	SV * pathname	1316	SV8 * pathname
910	int flags	1317	int flags
911	int mode	1318	int mode
912	SV * callback	1319	SV * callback
913	PROTOTYPE: $$$;$	1320	PROTOTYPE: $$$;$
914	PPCODE:	1321	PPCODE:
915	{	1322	{
916	dREQ;	1323	dREQ;
917		1324
918	req->type = REQ_OPEN;	1325	req->type = REQ_OPEN;
919	req->data = newSVsv (pathname);	1326	req->sv1 = newSVsv (pathname);
920	req->dataptr = SvPVbyte_nolen (req->data);	1327	req->ptr1 = SvPVbyte_nolen (req->sv1);
921	req->fd = flags;	1328	req->int1 = flags;
922	req->mode = mode;	1329	req->mode = mode;
923		1330
924	REQ_SEND;	1331	REQ_SEND;
925	}	1332	}
926		1333
…		…
936	PPCODE:	1343	PPCODE:
937	{	1344	{
938	dREQ;	1345	dREQ;
939		1346
940	req->type = ix;	1347	req->type = ix;
941	req->fh = newSVsv (fh);	1348	req->fh = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
943		1350
944	REQ_SEND (req);	1351	REQ_SEND (req);
945	}	1352	}
946		1353
947	void	1354	void
948	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
949	SV * fh	1356	SV * fh
950	UV offset	1357	UV offset
951	UV length	1358	UV length
952	SV * data	1359	SV8 * data
953	UV dataoffset	1360	UV dataoffset
954	SV * callback	1361	SV * callback
955	ALIAS:	1362	ALIAS:
956	aio_read = REQ_READ	1363	aio_read = REQ_READ
957	aio_write = REQ_WRITE	1364	aio_write = REQ_WRITE
958	PROTOTYPE: $$$$$;$	1365	PROTOTYPE: $$$$$;$
959	PPCODE:	1366	PPCODE:
960	{	1367	{
961	aio_req req;
962	STRLEN svlen;	1368	STRLEN svlen;
963	char *svptr = SvPVbyte (data, svlen);	1369	char *svptr = SvPVbyte (data, svlen);
964		1370
965	SvUPGRADE (data, SVt_PV);	1371	SvUPGRADE (data, SVt_PV);
966	SvPOK_on (data);	1372	SvPOK_on (data);
…		…
988		1394
989	{	1395	{
990	dREQ;	1396	dREQ;
991		1397
992	req->type = ix;	1398	req->type = ix;
993	req->fh = newSVsv (fh);	1399	req->fh = newSVsv (fh);
994	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
995	: IoOFP (sv_2io (fh)));	1401	: IoOFP (sv_2io (fh)));
996	req->offset = offset;	1402	req->offs = offset;
997	req->length = length;	1403	req->size = length;
998	req->data = SvREFCNT_inc (data);	1404	req->sv1 = SvREFCNT_inc (data);
999	req->dataptr = (char *)svptr + dataoffset;	1405	req->ptr1 = (char *)svptr + dataoffset;
		1406	req->stroffset = dataoffset;
1000		1407
1001	if (!SvREADONLY (data))	1408	if (!SvREADONLY (data))
1002	{	1409	{
1003	SvREADONLY_on (data);	1410	SvREADONLY_on (data);
1004	req->data2ptr = (void *)data;	1411	req->flags |= FLAG_SV1_RO_OFF;
1005	}	1412	}
1006		1413
1007	REQ_SEND;	1414	REQ_SEND;
1008	}	1415	}
		1416	}
		1417
		1418	void
		1419	aio_readlink (path,callback=&PL_sv_undef)
		1420	SV8 * path
		1421	SV * callback
		1422	PROTOTYPE: $$;$
		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;
1009	}	1438	}
1010		1439
1011	void	1440	void
1012	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)
1013	SV * out_fh	1442	SV * out_fh
…		…
1019	PPCODE:	1448	PPCODE:
1020	{	1449	{
1021	dREQ;	1450	dREQ;
1022		1451
1023	req->type = REQ_SENDFILE;	1452	req->type = REQ_SENDFILE;
1024	req->fh = newSVsv (out_fh);	1453	req->fh = newSVsv (out_fh);
1025	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026	req->fh2 = newSVsv (in_fh);	1455	req->sv2 = newSVsv (in_fh);
1027	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028	req->offset = in_offset;	1457	req->offs = in_offset;
1029	req->length = length;	1458	req->size = length;
1030		1459
1031	REQ_SEND;	1460	REQ_SEND;
1032	}	1461	}
1033		1462
1034	void	1463	void
…		…
1041	PPCODE:	1470	PPCODE:
1042	{	1471	{
1043	dREQ;	1472	dREQ;
1044		1473
1045	req->type = REQ_READAHEAD;	1474	req->type = REQ_READAHEAD;
1046	req->fh = newSVsv (fh);	1475	req->fh = newSVsv (fh);
1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1048	req->offset = offset;	1477	req->offs = offset;
1049	req->length = length;	1478	req->size = length;
1050		1479
1051	REQ_SEND;	1480	REQ_SEND;
1052	}	1481	}
1053		1482
1054	void	1483	void
1055	aio_stat (fh_or_path,callback=&PL_sv_undef)	1484	aio_stat (fh_or_path,callback=&PL_sv_undef)
1056	SV * fh_or_path	1485	SV8 * fh_or_path
1057	SV * callback	1486	SV * callback
1058	ALIAS:	1487	ALIAS:
1059	aio_stat = REQ_STAT	1488	aio_stat = REQ_STAT
1060	aio_lstat = REQ_LSTAT	1489	aio_lstat = REQ_LSTAT
1061	PPCODE:	1490	PPCODE:
1062	{	1491	{
1063	dREQ;	1492	dREQ;
1064		1493
1065	New (0, req->statdata, 1, Stat_t);	1494	req->ptr2 = malloc (sizeof (Stat_t));
1066	if (!req->statdata)	1495	if (!req->ptr2)
1067	{	1496	{
1068	req_free (req);	1497	req_free (req);
1069	croak ("out of memory during aio_req->statdata allocation");	1498	croak ("out of memory during aio_stat statdata allocation");
1070	}	1499	}
		1500
		1501	req->flags |= FLAG_PTR2_FREE;
1071		1502
1072	if (SvPOK (fh_or_path))	1503	if (SvPOK (fh_or_path))
1073	{	1504	{
1074	req->type = ix;	1505	req->type = ix;
1075	req->data = newSVsv (fh_or_path);	1506	req->sv1 = newSVsv (fh_or_path);
1076	req->dataptr = SvPVbyte_nolen (req->data);	1507	req->ptr1 = SvPVbyte_nolen (req->sv1);
1077	}	1508	}
1078	else	1509	else
1079	{	1510	{
1080	req->type = REQ_FSTAT;	1511	req->type = REQ_FSTAT;
1081	req->fh = newSVsv (fh_or_path);	1512	req->fh = newSVsv (fh_or_path);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1083	}	1514	}
1084		1515
1085	REQ_SEND;	1516	REQ_SEND;
1086	}	1517	}
1087		1518
1088	void	1519	void
1089	aio_unlink (pathname,callback=&PL_sv_undef)	1520	aio_unlink (pathname,callback=&PL_sv_undef)
1090	SV * pathname	1521	SV8 * pathname
1091	SV * callback	1522	SV * callback
1092	ALIAS:	1523	ALIAS:
1093	aio_unlink = REQ_UNLINK	1524	aio_unlink = REQ_UNLINK
1094	aio_rmdir = REQ_RMDIR	1525	aio_rmdir = REQ_RMDIR
1095	aio_readdir = REQ_READDIR	1526	aio_readdir = REQ_READDIR
1096	PPCODE:	1527	PPCODE:
1097	{	1528	{
1098	dREQ;	1529	dREQ;
1099		1530
1100	req->type = ix;	1531	req->type = ix;
1101	req->data = newSVsv (pathname);	1532	req->sv1 = newSVsv (pathname);
1102	req->dataptr = SvPVbyte_nolen (req->data);	1533	req->ptr1 = SvPVbyte_nolen (req->sv1);
1103		1534
1104	REQ_SEND;	1535	REQ_SEND;
1105	}	1536	}
1106		1537
1107	void	1538	void
1108	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1109	SV * oldpath	1540	SV8 * oldpath
1110	SV * newpath	1541	SV8 * newpath
1111	SV * callback	1542	SV * callback
1112	ALIAS:	1543	ALIAS:
1113	aio_link = REQ_LINK	1544	aio_link = REQ_LINK
1114	aio_symlink = REQ_SYMLINK	1545	aio_symlink = REQ_SYMLINK
1115	aio_rename = REQ_RENAME	1546	aio_rename = REQ_RENAME
1116	PPCODE:	1547	PPCODE:
1117	{	1548	{
1118	dREQ;	1549	dREQ;
1119		1550
1120	req->type = ix;	1551	req->type = ix;
1121	req->fh = newSVsv (oldpath);	1552	req->fh = newSVsv (oldpath);
1122	req->data2ptr = SvPVbyte_nolen (req->fh);	1553	req->ptr2 = SvPVbyte_nolen (req->fh);
1123	req->data = newSVsv (newpath);	1554	req->sv1 = newSVsv (newpath);
1124	req->dataptr = SvPVbyte_nolen (req->data);	1555	req->ptr1 = SvPVbyte_nolen (req->sv1);
1125		1556
1126	REQ_SEND;	1557	REQ_SEND;
1127	}	1558	}
1128		1559
1129	void	1560	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1131	double delay	1562	SV8 * pathname
1132	SV * callback	1563	SV * callback
		1564	UV mode
		1565	UV dev
1133	PPCODE:	1566	PPCODE:
1134	{	1567	{
1135	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	}
1136		1578
		1579	void
		1580	aio_busy (delay,callback=&PL_sv_undef)
		1581	double delay
		1582	SV * callback
		1583	PPCODE:
		1584	{
		1585	dREQ;
		1586
1137	req->type = REQ_SLEEP;	1587	req->type = REQ_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	1588	req->int1 = delay < 0. ? 0 : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1140		1590
1141	REQ_SEND;	1591	REQ_SEND;
1142	}	1592	}
1143		1593
1144	void	1594	void
1145	aio_group (callback=&PL_sv_undef)	1595	aio_group (callback=&PL_sv_undef)
1146	SV * callback	1596	SV * callback
1147	PROTOTYPE: ;&	1597	PROTOTYPE: ;$
1148	PPCODE:	1598	PPCODE:
1149	{	1599	{
1150	dREQ;	1600	dREQ;
		1601
1151	req->type = REQ_GROUP;	1602	req->type = REQ_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154		1603
1155	req_send (req);	1604	req_send (req);
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	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;
1158		1641
1159	void	1642	void
1160	flush ()	1643	flush ()
1161	PROTOTYPE:	1644	PROTOTYPE:
1162	CODE:	1645	CODE:
1163	while (nreqs)	1646	while (nreqs)
1164	{	1647	{
1165	poll_wait ();	1648	poll_wait ();
1166	poll_cb ();	1649	poll_cb (0);
1167	}	1650	}
1168		1651
1169	void	1652	void
1170	poll()	1653	poll()
1171	PROTOTYPE:	1654	PROTOTYPE:
1172	CODE:	1655	CODE:
1173	if (nreqs)	1656	if (nreqs)
1174	{	1657	{
1175	poll_wait ();	1658	poll_wait ();
1176	poll_cb ();	1659	poll_cb (0);
1177	}	1660	}
1178		1661
1179	int	1662	int
1180	poll_fileno()	1663	poll_fileno()
1181	PROTOTYPE:	1664	PROTOTYPE:
…		…
1205	CODE:	1688	CODE:
1206	RETVAL = nreqs;	1689	RETVAL = nreqs;
1207	OUTPUT:	1690	OUTPUT:
1208	RETVAL	1691	RETVAL
1209		1692
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1693	int
1211		1694	nready()
1212	void
1213	cancel (aio_req_ornot req)
1214	PROTOTYPE:	1695	PROTOTYPE:
1215	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:
1216	req_cancel (req);	1726	req_cancel (req);
1217		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
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1734	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1735
1220	void	1736	void
1221	add (aio_req grp, ...)	1737	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1738	PPCODE:
1224	{	1739	{
1225	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");
1226		1745
1227	for (i = 1; i < items; ++i )	1746	for (i = 1; i < items; ++i )
1228	{	1747	{
1229	aio_req req = SvAIO_REQ (ST (i));
1230
1231	req->grp_prev = grp;
1232	req->grp_next = grp->grp_next;
1233	grp->grp_next->grp_prev = req;
1234	grp->grp_next = req;
1235
1236	req->grp = grp;
1237
1238	if (GIMME_V != G_VOID)	1748	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1749	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1750
		1751	req = SvAIO_REQ (ST (i));
		1752
		1753	if (req)
		1754	{
		1755	++grp->size;
		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;
		1765	}
1240	}	1766	}
1241	}	1767	}
1242		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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