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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 1.93 by root, Wed Nov 8 02:01:02 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 = POPs;
		453	PUSHMARK (SP);
176	XPUSHs (rv);	454	XPUSHs (fh);
		455	}
		456	break;
		457
		458	case REQ_GROUP:
		459	req->int1 = 2; /* mark group as finished */
		460
		461	if (req->sv1)
		462	{
		463	int i;
		464	AV *av = (AV *)req->sv1;
		465
		466	EXTEND (SP, AvFILL (av) + 1);
		467	for (i = 0; i <= AvFILL (av); ++i)
		468	PUSHs (*av_fetch (av, i, 0));
		469	}
		470	break;
		471
		472	case REQ_NOP:
		473	case REQ_BUSY:
		474	break;
		475
		476	case REQ_READLINK:
		477	if (req->result > 0)
		478	{
		479	SvCUR_set (req->sv1, req->result);
		480	*SvEND (req->sv1) = 0;
		481	PUSHs (req->sv1);
		482	}
		483	break;
		484
		485	case REQ_STAT:
		486	case REQ_LSTAT:
		487	case REQ_FSTAT:
		488	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		489	PL_laststatval = req->result;
		490	PL_statcache = *(Stat_t *)(req->ptr2);
		491	PUSHs (sv_2mortal (newSViv (req->result)));
		492	break;
		493
		494	case REQ_READ:
		495	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		496	*SvEND (req->sv1) = 0;
		497	PUSHs (sv_2mortal (newSViv (req->result)));
		498	break;
		499
		500	default:
		501	PUSHs (sv_2mortal (newSViv (req->result)));
		502	break;
177	}	503	}
178	break;
179		504
180	case REQ_OPEN:	505	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		506
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	507	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	508	call_sv (req->callback, G_VOID | G_EVAL);
188	SPAGAIN;	509	SPAGAIN;
189		510
190	fh = SvREFCNT_inc (POPs);	511	FREETMPS;
191		512	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	}	513	}
205		514
		515	if (req->grp)
		516	{
		517	aio_req grp = req->grp;
206		518
207	PUTBACK;	519	/* unlink request */
208	call_sv (req->callback, G_VOID | G_EVAL);	520	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
209	SPAGAIN;	521	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		522
		523	if (grp->grp_first == req)
		524	grp->grp_first = req->grp_next;
		525
		526	aio_grp_dec (grp);
		527	}
210		528
211	if (SvTRUE (ERRSV))	529	if (SvTRUE (ERRSV))
212	{	530	{
213	req_free (req);	531	req_free (req);
214	croak (0);	532	croak (0);
215	}	533	}
216
217	LEAVE;
218
219	errno = errorno;
220	}	534	}
221		535
222	static void req_free (aio_req req)	536	static void req_free (aio_req req)
223	{	537	{
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)	538	if (req->self)
240	{	539	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
243	}	542	}
244		543
245	if (req->data)
246	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
250		545	SvREFCNT_dec (req->sv1);
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
259		548
260	if (req->type == REQ_READDIR && req->result >= 0)	549	if (req->flags & FLAG_PTR2_FREE)
261	free (req->data2ptr);	550	free (req->ptr2);
262		551
263	Safefree (req);	552	Safefree (req);
264	}	553	}
265		554
		555	static void req_cancel_subs (aio_req grp)
		556	{
		557	aio_req sub;
		558
		559	if (grp->type != REQ_GROUP)
		560	return;
		561
		562	SvREFCNT_dec (grp->sv2);
		563	grp->sv2 = 0;
		564
		565	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		566	req_cancel (sub);
		567	}
		568
266	static void req_cancel (aio_req req)	569	static void req_cancel (aio_req req)
267	{	570	{
268	req->cancelled = 1;	571	req->flags |= FLAG_CANCELLED;
269		572
270	if (req->type == REQ_GROUP)	573	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	}	574	}
342		575
343	static void *aio_proc(void *arg);	576	static void *aio_proc(void *arg);
344		577
345	static void start_thread (void)	578	static void start_thread (void)
346	{	579	{
347	sigset_t fullsigset, oldsigset;	580	sigset_t fullsigset, oldsigset;
348	pthread_t tid;
349	pthread_attr_t attr;	581	pthread_attr_t attr;
		582
		583	worker *wrk = calloc (1, sizeof (worker));
		584
		585	if (!wrk)
		586	croak ("unable to allocate worker thread data");
350		587
351	pthread_attr_init (&attr);	588	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);	589	pthread_attr_setstacksize (&attr, STACKSIZE);
353	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	590	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		591	#ifdef PTHREAD_SCOPE_PROCESS
		592	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		593	#endif
354		594
355	sigfillset (&fullsigset);	595	sigfillset (&fullsigset);
		596
		597	LOCK (wrklock);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	598	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357		599
358	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	600	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	{	601	{
377	reqe->next = req;	602	wrk->prev = &wrk_first;
378	reqe = req;	603	wrk->next = wrk_first.next;
		604	wrk_first.next->prev = wrk;
		605	wrk_first.next = wrk;
		606	++started;
379	}	607	}
380	else	608	else
381	reqe = reqs = req;	609	free (wrk);
382		610
		611	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		612	UNLOCK (wrklock);
		613	}
		614
		615	static void maybe_start_thread ()
		616	{
		617	if (get_nthreads () >= wanted)
		618	return;
		619
		620	/* todo: maybe use idle here, but might be less exact */
		621	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		622	return;
		623
		624	start_thread ();
		625	}
		626
		627	static void req_send (aio_req req)
		628	{
		629	++nreqs;
		630
		631	LOCK (reqlock);
		632	++nready;
		633	reqq_push (&req_queue, req);
383	pthread_cond_signal (&reqwait);	634	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);	635	UNLOCK (reqlock);
385		636
386	if (nreqs > max_outstanding)	637	maybe_start_thread ();
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}	638	}
397		639
398	static void end_thread (void)	640	static void end_thread (void)
399	{	641	{
400	aio_req req;	642	aio_req req;
		643
401	Newz (0, req, 1, aio_cb);	644	Newz (0, req, 1, aio_cb);
		645
402	req->type = REQ_QUIT;	646	req->type = REQ_QUIT;
		647	req->pri = PRI_MAX + PRI_BIAS;
403		648
404	req_send (req);	649	LOCK (reqlock);
		650	reqq_push (&req_queue, req);
		651	pthread_cond_signal (&reqwait);
		652	UNLOCK (reqlock);
		653
		654	LOCK (wrklock);
		655	--started;
		656	UNLOCK (wrklock);
		657	}
		658
		659	static void set_max_idle (int nthreads)
		660	{
		661	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		662	max_idle = nthreads <= 0 ? 1 : nthreads;
		663	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
405	}	664	}
406		665
407	static void min_parallel (int nthreads)	666	static void min_parallel (int nthreads)
408	{	667	{
409	if (wanted < nthreads)	668	if (wanted < nthreads)
410	wanted = nthreads;	669	wanted = nthreads;
411	}	670	}
412		671
413	static void max_parallel (int nthreads)	672	static void max_parallel (int nthreads)
414	{	673	{
415	int cur = started;
416
417	if (wanted > nthreads)	674	if (wanted > nthreads)
418	wanted = nthreads;	675	wanted = nthreads;
419		676
420	while (cur > wanted)	677	while (started > wanted)
		678	end_thread ();
		679	}
		680
		681	static void poll_wait ()
		682	{
		683	fd_set rfd;
		684
		685	while (nreqs)
421	{	686	{
		687	int size;
		688	if (WORDACCESS_UNSAFE) LOCK (reslock);
		689	size = res_queue.size;
		690	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		691
		692	if (size)
		693	return;
		694
422	end_thread ();	695	maybe_start_thread ();
423	cur--;	696
		697	FD_ZERO(&rfd);
		698	FD_SET(respipe [0], &rfd);
		699
		700	select (respipe [0] + 1, &rfd, 0, 0, 0);
424	}	701	}
		702	}
425		703
426	while (started > wanted)	704	static int poll_cb ()
		705	{
		706	dSP;
		707	int count = 0;
		708	int maxreqs = max_poll_reqs;
		709	int do_croak = 0;
		710	struct timeval tv_start, tv_now;
		711	aio_req req;
		712
		713	if (max_poll_time)
		714	gettimeofday (&tv_start, 0);
		715
		716	for (;;)
427	{	717	{
		718	for (;;)
		719	{
		720	maybe_start_thread ();
		721
		722	LOCK (reslock);
		723	req = reqq_shift (&res_queue);
		724
		725	if (req)
		726	{
		727	--npending;
		728
		729	if (!res_queue.size)
		730	{
		731	/* read any signals sent by the worker threads */
		732	char buf [32];
		733	while (read (respipe [0], buf, 32) == 32)
		734	;
		735	}
		736	}
		737
		738	UNLOCK (reslock);
		739
		740	if (!req)
		741	break;
		742
		743	--nreqs;
		744
		745	if (req->type == REQ_GROUP && req->size)
		746	{
		747	req->int1 = 1; /* mark request as delayed */
		748	continue;
		749	}
		750	else
		751	{
		752	req_invoke (req);
		753
		754	count++;
		755	}
		756
		757	req_free (req);
		758
		759	if (maxreqs && !--maxreqs)
		760	break;
		761
		762	if (max_poll_time)
		763	{
		764	gettimeofday (&tv_now, 0);
		765
		766	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		767	break;
		768	}
		769	}
		770
		771	if (nreqs <= max_outstanding)
		772	break;
		773
428	poll_wait ();	774	poll_wait ();
429	poll_cb ();	775
		776	++maxreqs;
430	}	777	}
		778
		779	return count;
431	}	780	}
432		781
433	static void create_pipe ()	782	static void create_pipe ()
434	{	783	{
435	if (pipe (respipe))	784	if (pipe (respipe))
…		…
459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	808	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460	{	809	{
461	ssize_t res;	810	ssize_t res;
462	off_t ooffset;	811	off_t ooffset;
463		812
464	pthread_mutex_lock (&preadwritelock);	813	LOCK (preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);	814	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);	815	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);	816	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);	817	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);	818	UNLOCK (preadwritelock);
470		819
471	return res;	820	return res;
472	}	821	}
473		822
474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	823	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
475	{	824	{
476	ssize_t res;	825	ssize_t res;
477	off_t ooffset;	826	off_t ooffset;
478		827
479	pthread_mutex_lock (&preadwritelock);	828	LOCK (preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);	829	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);	830	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);	831	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);	832	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);	833	UNLOCK (preadwritelock);
485		834
486	return res;	835	return res;
487	}	836	}
488	#endif	837	#endif
489		838
490	#if !HAVE_FDATASYNC	839	#if !HAVE_FDATASYNC
491	# define fdatasync fsync	840	# define fdatasync fsync
492	#endif	841	#endif
493		842
494	#if !HAVE_READAHEAD	843	#if !HAVE_READAHEAD
495	# define readahead aio_readahead	844	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
496		845
497	static ssize_t readahead (int fd, off_t offset, size_t count)	846	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
498	{	847	{
499	char readahead_buf[4096];	848	dBUF;
500		849
501	while (count > 0)	850	while (count > 0)
502	{	851	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	852	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
504		853
505	pread (fd, readahead_buf, len, offset);	854	pread (fd, aio_buf, len, offset);
506	offset += len;	855	offset += len;
507	count -= len;	856	count -= len;
508	}	857	}
509		858
510	errno = 0;	859	errno = 0;
511	}	860	}
		861
512	#endif	862	#endif
513		863
514	#if !HAVE_READDIR_R	864	#if !HAVE_READDIR_R
515	# define readdir_r aio_readdir_r	865	# define readdir_r aio_readdir_r
516		866
…		…
519	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	869	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520	{	870	{
521	struct dirent *e;	871	struct dirent *e;
522	int errorno;	872	int errorno;
523		873
524	pthread_mutex_lock (&readdirlock);	874	LOCK (readdirlock);
525		875
526	e = readdir (dirp);	876	e = readdir (dirp);
527	errorno = errno;	877	errorno = errno;
528		878
529	if (e)	879	if (e)
…		…
532	strcpy (ent->d_name, e->d_name);	882	strcpy (ent->d_name, e->d_name);
533	}	883	}
534	else	884	else
535	*res = 0;	885	*res = 0;
536		886
537	pthread_mutex_unlock (&readdirlock);	887	UNLOCK (readdirlock);
538		888
539	errno = errorno;	889	errno = errorno;
540	return e ? 0 : -1;	890	return e ? 0 : -1;
541	}	891	}
542	#endif	892	#endif
543		893
544	/* sendfile always needs emulation */	894	/* sendfile always needs emulation */
545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	895	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
546	{	896	{
547	ssize_t res;	897	ssize_t res;
548		898
549	if (!count)	899	if (!count)
550	return 0;	900	return 0;
…		…
561	{	911	{
562	off_t sbytes;	912	off_t sbytes;
563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	913	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564		914
565	if (res < 0 && sbytes)	915	if (res < 0 && sbytes)
566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	916	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
567	res = sbytes;	917	res = sbytes;
568	}	918	}
569		919
570	# elif __hpux	920	# elif __hpux
571	res = sendfile (ofd, ifd, offset, count, 0, 0);	921	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
599	#endif	949	#endif
600	)	950	)
601	)	951	)
602	{	952	{
603	/* emulate sendfile. this is a major pain in the ass */	953	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];	954	dBUF;
		955
605	res = 0;	956	res = 0;
606		957
607	while (count)	958	while (count)
608	{	959	{
609	ssize_t cnt;	960	ssize_t cnt;
610		961
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	962	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
612		963
613	if (cnt <= 0)	964	if (cnt <= 0)
614	{	965	{
615	if (cnt && !res) res = -1;	966	if (cnt && !res) res = -1;
616	break;	967	break;
617	}	968	}
618		969
619	cnt = write (ofd, buf, cnt);	970	cnt = write (ofd, aio_buf, cnt);
620		971
621	if (cnt <= 0)	972	if (cnt <= 0)
622	{	973	{
623	if (cnt && !res) res = -1;	974	if (cnt && !res) res = -1;
624	break;	975	break;
…		…
632		983
633	return res;	984	return res;
634	}	985	}
635		986
636	/* read a full directory */	987	/* read a full directory */
637	static int scandir_ (const char *path, void **namesp)	988	static void scandir_ (aio_req req, worker *self)
638	{	989	{
639	DIR *dirp = opendir (path);	990	DIR *dirp;
640	union	991	union
641	{	992	{
642	struct dirent d;	993	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	994	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;	995	} *u;
645	struct dirent *entp;	996	struct dirent *entp;
646	char *name, *names;	997	char *name, *names;
647	int memlen = 4096;	998	int memlen = 4096;
648	int memofs = 0;	999	int memofs = 0;
649	int res = 0;	1000	int res = 0;
650	int errorno;	1001	int errorno;
651		1002
652	if (!dirp)	1003	LOCK (wrklock);
653	return -1;	1004	self->dirp = dirp = opendir (req->ptr1);
654		1005	self->dbuf = u = malloc (sizeof (*u));
		1006	req->flags |= FLAG_PTR2_FREE;
655	names = malloc (memlen);	1007	req->ptr2 = names = malloc (memlen);
		1008	UNLOCK (wrklock);
		1009
		1010	if (dirp && u && names)
		1011	for (;;)
		1012	{
		1013	errno = 0;
		1014	readdir_r (dirp, &u->d, &entp);
		1015
		1016	if (!entp)
		1017	break;
		1018
		1019	name = entp->d_name;
		1020
		1021	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1022	{
		1023	int len = strlen (name) + 1;
		1024
		1025	res++;
		1026
		1027	while (memofs + len > memlen)
		1028	{
		1029	memlen *= 2;
		1030	LOCK (wrklock);
		1031	req->ptr2 = names = realloc (names, memlen);
		1032	UNLOCK (wrklock);
		1033
		1034	if (!names)
		1035	break;
		1036	}
		1037
		1038	memcpy (names + memofs, name, len);
		1039	memofs += len;
		1040	}
		1041	}
		1042
		1043	if (errno)
		1044	res = -1;
		1045
		1046	req->result = res;
		1047	}
		1048
		1049	/*****************************************************************************/
		1050
		1051	static void *aio_proc (void *thr_arg)
		1052	{
		1053	aio_req req;
		1054	struct timespec ts;
		1055	worker *self = (worker *)thr_arg;
		1056
		1057	/* try to distribute timeouts somewhat evenly */
		1058	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1059	* (1000000000UL / 1024UL);
656		1060
657	for (;;)	1061	for (;;)
658	{	1062	{
659	errno = 0, readdir_r (dirp, &u.d, &entp);	1063	ts.tv_sec = time (0) + IDLE_TIMEOUT;
660		1064
661	if (!entp)	1065	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		1066
710	for (;;)	1067	for (;;)
711	{	1068	{
712	req = reqs;	1069	self->req = req = reqq_shift (&req_queue);
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719		1070
720	if (req)	1071	if (req)
721	break;	1072	break;
722		1073
		1074	++idle;
		1075
		1076	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1077	== ETIMEDOUT)
		1078	{
		1079	if (idle > max_idle)
		1080	{
		1081	--idle;
		1082	UNLOCK (reqlock);
		1083	LOCK (wrklock);
		1084	--started;
		1085	UNLOCK (wrklock);
		1086	goto quit;
		1087	}
		1088
		1089	/* we are allowed to idle, so do so without any timeout */
723	pthread_cond_wait (&reqwait, &reqlock);	1090	pthread_cond_wait (&reqwait, &reqlock);
		1091	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1092	}
		1093
		1094	--idle;
724	}	1095	}
725		1096
726	pthread_mutex_unlock (&reqlock);	1097	--nready;
		1098
		1099	UNLOCK (reqlock);
727		1100
728	errno = 0; /* strictly unnecessary */	1101	errno = 0; /* strictly unnecessary */
729		1102
730	if (!req->cancelled)	1103	if (!(req->flags & FLAG_CANCELLED))
731	switch (req->type)	1104	switch (req->type)
732	{	1105	{
733	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1106	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;	1107	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
735		1108
736	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1109	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;	1110	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
738		1111
739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1112	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;	1113	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;	1114	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
742		1115
743	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1116	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
744	case REQ_CLOSE: req->result = close (req->fd); break;	1117	case REQ_CLOSE: req->result = close (req->int1); break;
745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1118	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
746	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1119	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
747	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1120	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1121	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1122	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1123	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1124	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
750		1125
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1126	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;	1127	case REQ_FSYNC: req->result = fsync (req->int1); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1128	case REQ_READDIR: scandir_ (req, self); break;
754		1129
755	case REQ_SLEEP:	1130	case REQ_BUSY:
756	{	1131	{
757	struct timeval tv;	1132	struct timeval tv;
758		1133
759	tv.tv_sec = req->fd;	1134	tv.tv_sec = req->int1;
760	tv.tv_usec = req->fd2;	1135	tv.tv_usec = req->int2;
761		1136
762	req->result = select (0, 0, 0, 0, &tv);	1137	req->result = select (0, 0, 0, 0, &tv);
763	}	1138	}
764		1139
		1140	case REQ_GROUP:
		1141	case REQ_NOP:
		1142	break;
		1143
765	case REQ_QUIT:	1144	case REQ_QUIT:
766	break;	1145	goto quit;
767		1146
768	default:	1147	default:
769	req->result = ENOSYS;	1148	req->result = ENOSYS;
770	break;	1149	break;
771	}	1150	}
772		1151
773	req->errorno = errno;	1152	req->errorno = errno;
774		1153
775	pthread_mutex_lock (&reslock);	1154	LOCK (reslock);
776		1155
777	req->next = 0;	1156	++npending;
778		1157
779	if (rese)	1158	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 */	1159	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);	1160	write (respipe [1], &respipe, 1);
790	}
791		1161
792	pthread_mutex_unlock (&reslock);	1162	self->req = 0;
		1163	worker_clear (self);
		1164
		1165	UNLOCK (reslock);
793	}	1166	}
794	while (type != REQ_QUIT);	1167
		1168	quit:
		1169	LOCK (wrklock);
		1170	worker_free (self);
		1171	UNLOCK (wrklock);
795		1172
796	return 0;	1173	return 0;
797	}	1174	}
798		1175
799	/*****************************************************************************/	1176	/*****************************************************************************/
800		1177
801	static void atfork_prepare (void)	1178	static void atfork_prepare (void)
802	{	1179	{
803	pthread_mutex_lock (&reqlock);	1180	LOCK (wrklock);
804	pthread_mutex_lock (&reslock);	1181	LOCK (reqlock);
		1182	LOCK (reslock);
805	#if !HAVE_PREADWRITE	1183	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);	1184	LOCK (preadwritelock);
807	#endif	1185	#endif
808	#if !HAVE_READDIR_R	1186	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);	1187	LOCK (readdirlock);
810	#endif	1188	#endif
811	}	1189	}
812		1190
813	static void atfork_parent (void)	1191	static void atfork_parent (void)
814	{	1192	{
815	#if !HAVE_READDIR_R	1193	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);	1194	UNLOCK (readdirlock);
817	#endif	1195	#endif
818	#if !HAVE_PREADWRITE	1196	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);	1197	UNLOCK (preadwritelock);
820	#endif	1198	#endif
821	pthread_mutex_unlock (&reslock);	1199	UNLOCK (reslock);
822	pthread_mutex_unlock (&reqlock);	1200	UNLOCK (reqlock);
		1201	UNLOCK (wrklock);
823	}	1202	}
824		1203
825	static void atfork_child (void)	1204	static void atfork_child (void)
826	{	1205	{
827	aio_req prv;	1206	aio_req prv;
828		1207
829	started = 0;	1208	while (prv = reqq_shift (&req_queue))
		1209	req_free (prv);
830		1210
831	while (reqs)	1211	while (prv = reqq_shift (&res_queue))
		1212	req_free (prv);
		1213
		1214	while (wrk_first.next != &wrk_first)
832	{	1215	{
833	prv = reqs;	1216	worker *wrk = wrk_first.next;
834	reqs = prv->next;	1217
		1218	if (wrk->req)
		1219	req_free (wrk->req);
		1220
		1221	worker_clear (wrk);
835	req_free (prv);	1222	worker_free (wrk);
836	}	1223	}
837		1224
838	reqs = reqe = 0;	1225	started = 0;
839		1226	idle = 0;
840	while (ress)	1227	nreqs = 0;
841	{	1228	nready = 0;
842	prv = ress;	1229	npending = 0;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848		1230
849	close (respipe [0]);	1231	close (respipe [0]);
850	close (respipe [1]);	1232	close (respipe [1]);
851	create_pipe ();	1233	create_pipe ();
852		1234
853	atfork_parent ();	1235	atfork_parent ();
854	}	1236	}
855		1237
856	#define dREQ \	1238	#define dREQ \
857	aio_req req; \	1239	aio_req req; \
		1240	int req_pri = next_pri; \
		1241	next_pri = DEFAULT_PRI + PRI_BIAS; \
858	\	1242	\
859	if (SvOK (callback) && !SvROK (callback)) \	1243	if (SvOK (callback) && !SvROK (callback)) \
860	croak ("callback must be undef or of reference type"); \	1244	croak ("callback must be undef or of reference type"); \
861	\	1245	\
862	Newz (0, req, 1, aio_cb); \	1246	Newz (0, req, 1, aio_cb); \
863	if (!req) \	1247	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	1248	croak ("out of memory during aio_req allocation"); \
865	\	1249	\
866	req->callback = newSVsv (callback)	1250	req->callback = newSVsv (callback); \
		1251	req->pri = req_pri
867		1252
868	#define REQ_SEND \	1253	#define REQ_SEND \
869	req_send (req); \	1254	req_send (req); \
870	\	1255	\
871	if (GIMME_V != G_VOID) \	1256	if (GIMME_V != G_VOID) \
…		…
876	PROTOTYPES: ENABLE	1261	PROTOTYPES: ENABLE
877		1262
878	BOOT:	1263	BOOT:
879	{	1264	{
880	HV *stash = gv_stashpv ("IO::AIO", 1);	1265	HV *stash = gv_stashpv ("IO::AIO", 1);
		1266
881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1267	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1268	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1269	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1270	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1271	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1272	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
884		1273
885	create_pipe ();	1274	create_pipe ();
886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1275	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
887	}	1276	}
888		1277
889	void	1278	void
890	min_parallel (nthreads)	1279	max_poll_reqs (int nreqs)
891	int nthreads
892	PROTOTYPE: $	1280	PROTOTYPE: $
		1281	CODE:
		1282	max_poll_reqs = nreqs;
893		1283
894	void	1284	void
895	max_parallel (nthreads)	1285	max_poll_time (double nseconds)
896	int nthreads
897	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_time = nseconds * AIO_TICKS;
		1289
		1290	void
		1291	min_parallel (int nthreads)
		1292	PROTOTYPE: $
		1293
		1294	void
		1295	max_parallel (int nthreads)
		1296	PROTOTYPE: $
		1297
		1298	void
		1299	max_idle (int nthreads)
		1300	PROTOTYPE: $
		1301	CODE:
		1302	set_max_idle (nthreads);
898		1303
899	int	1304	int
900	max_outstanding (nreqs)	1305	max_outstanding (int maxreqs)
901	int nreqs	1306	PROTOTYPE: $
902	PROTOTYPE: $
903	CODE:	1307	CODE:
904	RETVAL = max_outstanding;	1308	RETVAL = max_outstanding;
905	max_outstanding = nreqs;	1309	max_outstanding = maxreqs;
		1310	OUTPUT:
		1311	RETVAL
906		1312
907	void	1313	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1314	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
909	SV * pathname	1315	SV8 * pathname
910	int flags	1316	int flags
911	int mode	1317	int mode
912	SV * callback	1318	SV * callback
913	PROTOTYPE: $$$;$	1319	PROTOTYPE: $$$;$
914	PPCODE:	1320	PPCODE:
915	{	1321	{
916	dREQ;	1322	dREQ;
917		1323
918	req->type = REQ_OPEN;	1324	req->type = REQ_OPEN;
919	req->data = newSVsv (pathname);	1325	req->sv1 = newSVsv (pathname);
920	req->dataptr = SvPVbyte_nolen (req->data);	1326	req->ptr1 = SvPVbyte_nolen (req->sv1);
921	req->fd = flags;	1327	req->int1 = flags;
922	req->mode = mode;	1328	req->mode = mode;
923		1329
924	REQ_SEND;	1330	REQ_SEND;
925	}	1331	}
926		1332
…		…
936	PPCODE:	1342	PPCODE:
937	{	1343	{
938	dREQ;	1344	dREQ;
939		1345
940	req->type = ix;	1346	req->type = ix;
941	req->fh = newSVsv (fh);	1347	req->fh = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1348	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
943		1349
944	REQ_SEND (req);	1350	REQ_SEND (req);
945	}	1351	}
946		1352
947	void	1353	void
948	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1354	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
949	SV * fh	1355	SV * fh
950	UV offset	1356	UV offset
951	UV length	1357	UV length
952	SV * data	1358	SV8 * data
953	UV dataoffset	1359	UV dataoffset
954	SV * callback	1360	SV * callback
955	ALIAS:	1361	ALIAS:
956	aio_read = REQ_READ	1362	aio_read = REQ_READ
957	aio_write = REQ_WRITE	1363	aio_write = REQ_WRITE
958	PROTOTYPE: $$$$$;$	1364	PROTOTYPE: $$$$$;$
959	PPCODE:	1365	PPCODE:
960	{	1366	{
961	aio_req req;
962	STRLEN svlen;	1367	STRLEN svlen;
963	char *svptr = SvPVbyte (data, svlen);	1368	char *svptr = SvPVbyte (data, svlen);
964		1369
965	SvUPGRADE (data, SVt_PV);	1370	SvUPGRADE (data, SVt_PV);
966	SvPOK_on (data);	1371	SvPOK_on (data);
…		…
988		1393
989	{	1394	{
990	dREQ;	1395	dREQ;
991		1396
992	req->type = ix;	1397	req->type = ix;
993	req->fh = newSVsv (fh);	1398	req->fh = newSVsv (fh);
994	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1399	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
995	: IoOFP (sv_2io (fh)));	1400	: IoOFP (sv_2io (fh)));
996	req->offset = offset;	1401	req->offs = offset;
997	req->length = length;	1402	req->size = length;
998	req->data = SvREFCNT_inc (data);	1403	req->sv1 = SvREFCNT_inc (data);
999	req->dataptr = (char *)svptr + dataoffset;	1404	req->ptr1 = (char *)svptr + dataoffset;
		1405	req->stroffset = dataoffset;
1000		1406
1001	if (!SvREADONLY (data))	1407	if (!SvREADONLY (data))
1002	{	1408	{
1003	SvREADONLY_on (data);	1409	SvREADONLY_on (data);
1004	req->data2ptr = (void *)data;	1410	req->flags |= FLAG_SV1_RO_OFF;
1005	}	1411	}
1006		1412
1007	REQ_SEND;	1413	REQ_SEND;
1008	}	1414	}
		1415	}
		1416
		1417	void
		1418	aio_readlink (path,callback=&PL_sv_undef)
		1419	SV8 * path
		1420	SV * callback
		1421	PROTOTYPE: $$;$
		1422	PPCODE:
		1423	{
		1424	SV *data;
		1425	dREQ;
		1426
		1427	data = newSV (NAME_MAX);
		1428	SvPOK_on (data);
		1429
		1430	req->type = REQ_READLINK;
		1431	req->fh = newSVsv (path);
		1432	req->ptr2 = SvPVbyte_nolen (req->fh);
		1433	req->sv1 = data;
		1434	req->ptr1 = SvPVbyte_nolen (data);
		1435
		1436	REQ_SEND;
1009	}	1437	}
1010		1438
1011	void	1439	void
1012	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1440	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1013	SV * out_fh	1441	SV * out_fh
…		…
1019	PPCODE:	1447	PPCODE:
1020	{	1448	{
1021	dREQ;	1449	dREQ;
1022		1450
1023	req->type = REQ_SENDFILE;	1451	req->type = REQ_SENDFILE;
1024	req->fh = newSVsv (out_fh);	1452	req->fh = newSVsv (out_fh);
1025	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026	req->fh2 = newSVsv (in_fh);	1454	req->sv2 = newSVsv (in_fh);
1027	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1455	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028	req->offset = in_offset;	1456	req->offs = in_offset;
1029	req->length = length;	1457	req->size = length;
1030		1458
1031	REQ_SEND;	1459	REQ_SEND;
1032	}	1460	}
1033		1461
1034	void	1462	void
…		…
1041	PPCODE:	1469	PPCODE:
1042	{	1470	{
1043	dREQ;	1471	dREQ;
1044		1472
1045	req->type = REQ_READAHEAD;	1473	req->type = REQ_READAHEAD;
1046	req->fh = newSVsv (fh);	1474	req->fh = newSVsv (fh);
1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1475	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1048	req->offset = offset;	1476	req->offs = offset;
1049	req->length = length;	1477	req->size = length;
1050		1478
1051	REQ_SEND;	1479	REQ_SEND;
1052	}	1480	}
1053		1481
1054	void	1482	void
1055	aio_stat (fh_or_path,callback=&PL_sv_undef)	1483	aio_stat (fh_or_path,callback=&PL_sv_undef)
1056	SV * fh_or_path	1484	SV8 * fh_or_path
1057	SV * callback	1485	SV * callback
1058	ALIAS:	1486	ALIAS:
1059	aio_stat = REQ_STAT	1487	aio_stat = REQ_STAT
1060	aio_lstat = REQ_LSTAT	1488	aio_lstat = REQ_LSTAT
1061	PPCODE:	1489	PPCODE:
1062	{	1490	{
1063	dREQ;	1491	dREQ;
1064		1492
1065	New (0, req->statdata, 1, Stat_t);	1493	req->ptr2 = malloc (sizeof (Stat_t));
1066	if (!req->statdata)	1494	if (!req->ptr2)
1067	{	1495	{
1068	req_free (req);	1496	req_free (req);
1069	croak ("out of memory during aio_req->statdata allocation");	1497	croak ("out of memory during aio_stat statdata allocation");
1070	}	1498	}
		1499
		1500	req->flags |= FLAG_PTR2_FREE;
1071		1501
1072	if (SvPOK (fh_or_path))	1502	if (SvPOK (fh_or_path))
1073	{	1503	{
1074	req->type = ix;	1504	req->type = ix;
1075	req->data = newSVsv (fh_or_path);	1505	req->sv1 = newSVsv (fh_or_path);
1076	req->dataptr = SvPVbyte_nolen (req->data);	1506	req->ptr1 = SvPVbyte_nolen (req->sv1);
1077	}	1507	}
1078	else	1508	else
1079	{	1509	{
1080	req->type = REQ_FSTAT;	1510	req->type = REQ_FSTAT;
1081	req->fh = newSVsv (fh_or_path);	1511	req->fh = newSVsv (fh_or_path);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1512	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1083	}	1513	}
1084		1514
1085	REQ_SEND;	1515	REQ_SEND;
1086	}	1516	}
1087		1517
1088	void	1518	void
1089	aio_unlink (pathname,callback=&PL_sv_undef)	1519	aio_unlink (pathname,callback=&PL_sv_undef)
1090	SV * pathname	1520	SV8 * pathname
1091	SV * callback	1521	SV * callback
1092	ALIAS:	1522	ALIAS:
1093	aio_unlink = REQ_UNLINK	1523	aio_unlink = REQ_UNLINK
1094	aio_rmdir = REQ_RMDIR	1524	aio_rmdir = REQ_RMDIR
1095	aio_readdir = REQ_READDIR	1525	aio_readdir = REQ_READDIR
1096	PPCODE:	1526	PPCODE:
1097	{	1527	{
1098	dREQ;	1528	dREQ;
1099		1529
1100	req->type = ix;	1530	req->type = ix;
1101	req->data = newSVsv (pathname);	1531	req->sv1 = newSVsv (pathname);
1102	req->dataptr = SvPVbyte_nolen (req->data);	1532	req->ptr1 = SvPVbyte_nolen (req->sv1);
1103		1533
1104	REQ_SEND;	1534	REQ_SEND;
1105	}	1535	}
1106		1536
1107	void	1537	void
1108	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1538	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1109	SV * oldpath	1539	SV8 * oldpath
1110	SV * newpath	1540	SV8 * newpath
1111	SV * callback	1541	SV * callback
1112	ALIAS:	1542	ALIAS:
1113	aio_link = REQ_LINK	1543	aio_link = REQ_LINK
1114	aio_symlink = REQ_SYMLINK	1544	aio_symlink = REQ_SYMLINK
1115	aio_rename = REQ_RENAME	1545	aio_rename = REQ_RENAME
1116	PPCODE:	1546	PPCODE:
1117	{	1547	{
1118	dREQ;	1548	dREQ;
1119		1549
1120	req->type = ix;	1550	req->type = ix;
1121	req->fh = newSVsv (oldpath);	1551	req->fh = newSVsv (oldpath);
1122	req->data2ptr = SvPVbyte_nolen (req->fh);	1552	req->ptr2 = SvPVbyte_nolen (req->fh);
1123	req->data = newSVsv (newpath);	1553	req->sv1 = newSVsv (newpath);
1124	req->dataptr = SvPVbyte_nolen (req->data);	1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
1125		1555
1126	REQ_SEND;	1556	REQ_SEND;
1127	}	1557	}
1128		1558
1129	void	1559	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	1560	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1131	double delay	1561	SV8 * pathname
1132	SV * callback	1562	SV * callback
		1563	UV mode
		1564	UV dev
1133	PPCODE:	1565	PPCODE:
1134	{	1566	{
1135	dREQ;	1567	dREQ;
		1568
		1569	req->type = REQ_MKNOD;
		1570	req->sv1 = newSVsv (pathname);
		1571	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1572	req->mode = (mode_t)mode;
		1573	req->offs = dev;
		1574
		1575	REQ_SEND;
		1576	}
1136		1577
		1578	void
		1579	aio_busy (delay,callback=&PL_sv_undef)
		1580	double delay
		1581	SV * callback
		1582	PPCODE:
		1583	{
		1584	dREQ;
		1585
1137	req->type = REQ_SLEEP;	1586	req->type = REQ_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	1587	req->int1 = delay < 0. ? 0 : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1588	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1140		1589
1141	REQ_SEND;	1590	REQ_SEND;
1142	}	1591	}
1143		1592
1144	void	1593	void
1145	aio_group (callback=&PL_sv_undef)	1594	aio_group (callback=&PL_sv_undef)
1146	SV * callback	1595	SV * callback
1147	PROTOTYPE: ;&	1596	PROTOTYPE: ;$
1148	PPCODE:	1597	PPCODE:
1149	{	1598	{
1150	dREQ;	1599	dREQ;
		1600
1151	req->type = REQ_GROUP;	1601	req->type = REQ_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154		1602
1155	req_send (req);	1603	req_send (req);
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1604	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	1605	}
		1606
		1607	void
		1608	aio_nop (callback=&PL_sv_undef)
		1609	SV * callback
		1610	PPCODE:
		1611	{
		1612	dREQ;
		1613
		1614	req->type = REQ_NOP;
		1615
		1616	REQ_SEND;
		1617	}
		1618
		1619	int
		1620	aioreq_pri (int pri = 0)
		1621	PROTOTYPE: ;$
		1622	CODE:
		1623	RETVAL = next_pri - PRI_BIAS;
		1624	if (items > 0)
		1625	{
		1626	if (pri < PRI_MIN) pri = PRI_MIN;
		1627	if (pri > PRI_MAX) pri = PRI_MAX;
		1628	next_pri = pri + PRI_BIAS;
		1629	}
		1630	OUTPUT:
		1631	RETVAL
		1632
		1633	void
		1634	aioreq_nice (int nice = 0)
		1635	CODE:
		1636	nice = next_pri - nice;
		1637	if (nice < PRI_MIN) nice = PRI_MIN;
		1638	if (nice > PRI_MAX) nice = PRI_MAX;
		1639	next_pri = nice + PRI_BIAS;
1158		1640
1159	void	1641	void
1160	flush ()	1642	flush ()
1161	PROTOTYPE:	1643	PROTOTYPE:
1162	CODE:	1644	CODE:
…		…
1164	{	1646	{
1165	poll_wait ();	1647	poll_wait ();
1166	poll_cb ();	1648	poll_cb ();
1167	}	1649	}
1168		1650
1169	void	1651	int
1170	poll()	1652	poll()
1171	PROTOTYPE:	1653	PROTOTYPE:
1172	CODE:	1654	CODE:
1173	if (nreqs)
1174	{
1175	poll_wait ();	1655	poll_wait ();
1176	poll_cb ();	1656	RETVAL = poll_cb ();
1177	}	1657	OUTPUT:
		1658	RETVAL
1178		1659
1179	int	1660	int
1180	poll_fileno()	1661	poll_fileno()
1181	PROTOTYPE:	1662	PROTOTYPE:
1182	CODE:	1663	CODE:
…		…
1194		1675
1195	void	1676	void
1196	poll_wait()	1677	poll_wait()
1197	PROTOTYPE:	1678	PROTOTYPE:
1198	CODE:	1679	CODE:
1199	if (nreqs)
1200	poll_wait ();	1680	poll_wait ();
1201		1681
1202	int	1682	int
1203	nreqs()	1683	nreqs()
1204	PROTOTYPE:	1684	PROTOTYPE:
1205	CODE:	1685	CODE:
1206	RETVAL = nreqs;	1686	RETVAL = nreqs;
1207	OUTPUT:	1687	OUTPUT:
1208	RETVAL	1688	RETVAL
1209		1689
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1690	int
1211		1691	nready()
1212	void
1213	cancel (aio_req_ornot req)
1214	PROTOTYPE:	1692	PROTOTYPE:
1215	CODE:	1693	CODE:
		1694	RETVAL = get_nready ();
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	int
		1699	npending()
		1700	PROTOTYPE:
		1701	CODE:
		1702	RETVAL = get_npending ();
		1703	OUTPUT:
		1704	RETVAL
		1705
		1706	int
		1707	nthreads()
		1708	PROTOTYPE:
		1709	CODE:
		1710	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1711	RETVAL = started;
		1712	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1713	OUTPUT:
		1714	RETVAL
		1715
		1716	PROTOTYPES: DISABLE
		1717
		1718	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1719
		1720	void
		1721	cancel (aio_req_ornot req)
		1722	CODE:
1216	req_cancel (req);	1723	req_cancel (req);
1217		1724
		1725	void
		1726	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1727	CODE:
		1728	SvREFCNT_dec (req->callback);
		1729	req->callback = newSVsv (callback);
		1730
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1731	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1732
1220	void	1733	void
1221	add (aio_req grp, ...)	1734	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1735	PPCODE:
1224	{	1736	{
1225	int i;	1737	int i;
		1738	aio_req req;
		1739
		1740	if (grp->int1 == 2)
		1741	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1226		1742
1227	for (i = 1; i < items; ++i )	1743	for (i = 1; i < items; ++i )
1228	{	1744	{
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)	1745	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1746	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1747
		1748	req = SvAIO_REQ (ST (i));
		1749
		1750	if (req)
		1751	{
		1752	++grp->size;
		1753	req->grp = grp;
		1754
		1755	req->grp_prev = 0;
		1756	req->grp_next = grp->grp_first;
		1757
		1758	if (grp->grp_first)
		1759	grp->grp_first->grp_prev = req;
		1760
		1761	grp->grp_first = req;
		1762	}
1240	}	1763	}
1241	}	1764	}
1242		1765
		1766	void
		1767	cancel_subs (aio_req_ornot req)
		1768	CODE:
		1769	req_cancel_subs (req);
		1770
		1771	void
		1772	result (aio_req grp, ...)
		1773	CODE:
		1774	{
		1775	int i;
		1776	AV *av;
		1777
		1778	grp->errorno = errno;
		1779
		1780	av = newAV ();
		1781
		1782	for (i = 1; i < items; ++i )
		1783	av_push (av, newSVsv (ST (i)));
		1784
		1785	SvREFCNT_dec (grp->sv1);
		1786	grp->sv1 = (SV *)av;
		1787	}
		1788
		1789	void
		1790	errno (aio_req grp, int errorno = errno)
		1791	CODE:
		1792	grp->errorno = errorno;
		1793
		1794	void
		1795	limit (aio_req grp, int limit)
		1796	CODE:
		1797	grp->int2 = limit;
		1798	aio_grp_feed (grp);
		1799
		1800	void
		1801	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1802	CODE:
		1803	{
		1804	SvREFCNT_dec (grp->sv2);
		1805	grp->sv2 = newSVsv (callback);
		1806
		1807	if (grp->int2 <= 0)
		1808	grp->int2 = 2;
		1809
		1810	aio_grp_feed (grp);
		1811	}
		1812

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