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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs.
Revision 1.88 by root, Mon Oct 30 23:43:17 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;
49		91
50	enum {	92	enum {
51	REQ_QUIT,	93	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	96	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
60	REQ_SLEEP,	102	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	103	REQ_BUSY,
62	};	104	};
63		105
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		108
67	typedef struct aio_cb	109	typedef struct aio_cb
68	{	110	{
69	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
70		112
		113	SV *callback, *fh;
		114	SV *sv1, *sv2;
		115	void *ptr1, *ptr2;
		116	off_t offs;
		117	size_t size;
		118	ssize_t result;
		119
		120	STRLEN stroffset;
		121	int type;
		122	int int1, int2;
		123	int errorno;
		124	mode_t mode; /* open */
		125
		126	unsigned char flags;
		127	unsigned char pri;
		128
		129	SV *self; /* the perl counterpart of this request, if any */
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	130	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
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;	131	} aio_cb;
		132
		133	enum {
		134	FLAG_CANCELLED = 0x01,
		135	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		136	FLAG_PTR2_FREE = 0x80, /* need free(ptr2) */
		137	};
90		138
91	typedef aio_cb *aio_req;	139	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	140	typedef aio_cb *aio_req_ornot;
93		141
		142	enum {
		143	PRI_MIN = -4,
		144	PRI_MAX = 4,
		145
		146	DEFAULT_PRI = 0,
		147	PRI_BIAS = -PRI_MIN,
		148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		149	};
		150
		151	#define AIO_TICKS ((1000000 + 1023) >> 10)
		152
		153	static unsigned int max_poll_time = 0;
		154	static unsigned int max_poll_reqs = 0;
		155
		156	/* calculcate time difference in ~1/AIO_TICKS of a second */
		157	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		158	{
		159	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		160	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		161	}
		162
		163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		164
94	static int started, wanted;	165	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	166
96	static int max_outstanding = 1<<30;	167	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		168	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		169	#else
		170	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		171	#endif
		172
		173	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		174	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		175
		176	/* worker threads management */
		177	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		178
		179	typedef struct worker {
		180	/* locked by wrklock */
		181	struct worker *prev, *next;
		182
		183	pthread_t tid;
		184
		185	/* locked by reslock, reqlock or wrklock */
		186	aio_req req; /* currently processed request */
		187	void *dbuf;
		188	DIR *dirp;
		189	} worker;
		190
		191	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		192
		193	static void worker_clear (worker *wrk)
		194	{
		195	if (wrk->dirp)
		196	{
		197	closedir (wrk->dirp);
		198	wrk->dirp = 0;
		199	}
		200
		201	if (wrk->dbuf)
		202	{
		203	free (wrk->dbuf);
		204	wrk->dbuf = 0;
		205	}
		206	}
		207
		208	static void worker_free (worker *wrk)
		209	{
		210	wrk->next->prev = wrk->prev;
		211	wrk->prev->next = wrk->next;
		212
		213	free (wrk);
		214	}
		215
		216	static volatile unsigned int nreqs, nready, npending;
		217	static volatile unsigned int max_idle = 4;
		218	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	219	static int respipe [2];
98		220
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		224
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	225	#if WORDACCESS_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		226
		227	static unsigned int get_nready ()
		228	{
		229	unsigned int retval;
		230
		231	LOCK (reqlock);
		232	retval = nready;
		233	UNLOCK (reqlock);
		234
		235	return retval;
		236	}
		237
		238	static unsigned int get_npending ()
		239	{
		240	unsigned int retval;
		241
		242	LOCK (reslock);
		243	retval = npending;
		244	UNLOCK (reslock);
		245
		246	return retval;
		247	}
		248
		249	static unsigned int get_nthreads ()
		250	{
		251	unsigned int retval;
		252
		253	LOCK (wrklock);
		254	retval = started;
		255	UNLOCK (wrklock);
		256
		257	return retval;
		258	}
		259
		260	#else
		261
		262	# define get_nready() nready
		263	# define get_npending() npending
		264	# define get_nthreads() started
		265
		266	#endif
		267
		268	/*
		269	* a somewhat faster data structure might be nice, but
		270	* with 8 priorities this actually needs <20 insns
		271	* per shift, the most expensive operation.
		272	*/
		273	typedef struct {
		274	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		275	int size;
		276	} reqq;
		277
		278	static reqq req_queue;
		279	static reqq res_queue;
		280
		281	int reqq_push (reqq *q, aio_req req)
		282	{
		283	int pri = req->pri;
		284	req->next = 0;
		285
		286	if (q->qe[pri])
		287	{
		288	q->qe[pri]->next = req;
		289	q->qe[pri] = req;
		290	}
		291	else
		292	q->qe[pri] = q->qs[pri] = req;
		293
		294	return q->size++;
		295	}
		296
		297	aio_req reqq_shift (reqq *q)
		298	{
		299	int pri;
		300
		301	if (!q->size)
		302	return 0;
		303
		304	--q->size;
		305
		306	for (pri = NUM_PRI; pri--; )
		307	{
		308	aio_req req = q->qs[pri];
		309
		310	if (req)
		311	{
		312	if (!(q->qs[pri] = req->next))
		313	q->qe[pri] = 0;
		314
		315	return req;
		316	}
		317	}
		318
		319	abort ();
		320	}
		321
		322	static int poll_cb ();
106	static void req_invoke (aio_req req);	323	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	324	static void req_free (aio_req req);
		325	static void req_cancel (aio_req req);
108		326
109	/* must be called at most once */	327	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	328	static SV *req_sv (aio_req req, const char *klass)
111	{	329	{
112	if (!req->self)	330	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	348	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	349	}
132		350
133	static void aio_grp_feed (aio_req grp)	351	static void aio_grp_feed (aio_req grp)
134	{	352	{
135	while (grp->length < grp->fd2)	353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
136	{	354	{
137	int old_len = grp->length;	355	int old_len = grp->size;
138		356
139	if (grp->fh2 && SvOK (grp->fh2))	357	if (grp->sv2 && SvOK (grp->sv2))
140	{	358	{
141	dSP;	359	dSP;
142		360
143	ENTER;	361	ENTER;
144	SAVETMPS;	362	SAVETMPS;
145	PUSHMARK (SP);	363	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;	365	PUTBACK;
148	call_sv (grp->fh2, G_VOID | G_EVAL);	366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
149	SPAGAIN;	367	SPAGAIN;
150	FREETMPS;	368	FREETMPS;
151	LEAVE;	369	LEAVE;
152	}	370	}
153		371
154	/* stop if no progress has been made */	372	/* stop if no progress has been made */
155	if (old_len == grp->length)	373	if (old_len == grp->size)
156	{	374	{
157	SvREFCNT_dec (grp->fh2);	375	SvREFCNT_dec (grp->sv2);
158	grp->fh2 = 0;	376	grp->sv2 = 0;
159	break;	377	break;
160	}	378	}
161	}	379	}
162	}	380	}
163		381
164	static void aio_grp_dec (aio_req grp)	382	static void aio_grp_dec (aio_req grp)
165	{	383	{
166	--grp->length;	384	--grp->size;
167		385
168	/* call feeder, if applicable */	386	/* call feeder, if applicable */
169	aio_grp_feed (grp);	387	aio_grp_feed (grp);
170		388
171	/* finish, if done */	389	/* finish, if done */
172	if (!grp->length && grp->fd)	390	if (!grp->size && grp->int1)
173	{	391	{
174	req_invoke (grp);	392	req_invoke (grp);
175	req_free (grp);	393	req_free (grp);
176	}	394	}
177	}	395	}
178		396
179	static void poll_wait ()	397	static void req_invoke (aio_req req)
180	{	398	{
181	if (nreqs && !ress)	399	dSP;
		400
		401	if (req->flags & FLAG_SV1_RO_OFF)
		402	SvREADONLY_off (req->sv1);
		403
		404	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
182	{	405	{
183	fd_set rfd;	406	ENTER;
184	FD_ZERO(&rfd);	407	SAVETMPS;
185	FD_SET(respipe [0], &rfd);	408	PUSHMARK (SP);
		409	EXTEND (SP, 1);
186		410
187	select (respipe [0] + 1, &rfd, 0, 0, 0);	411	switch (req->type)
		412	{
		413	case REQ_READDIR:
		414	{
		415	SV *rv = &PL_sv_undef;
		416
		417	if (req->result >= 0)
		418	{
		419	int i;
		420	char *buf = req->ptr2;
		421	AV *av = newAV ();
		422
		423	av_extend (av, req->result - 1);
		424
		425	for (i = 0; i < req->result; ++i)
		426	{
		427	SV *sv = newSVpv (buf, 0);
		428
		429	av_store (av, i, sv);
		430	buf += SvCUR (sv) + 1;
		431	}
		432
		433	rv = sv_2mortal (newRV_noinc ((SV *)av));
		434	}
		435
		436	PUSHs (rv);
		437	}
		438	break;
		439
		440	case REQ_OPEN:
		441	{
		442	/* convert fd to fh */
		443	SV *fh;
		444
		445	PUSHs (sv_2mortal (newSViv (req->result)));
		446	PUTBACK;
		447	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		448	SPAGAIN;
		449
		450	fh = SvREFCNT_inc (POPs);
		451
		452	PUSHMARK (SP);
		453	XPUSHs (sv_2mortal (fh));
		454	}
		455	break;
		456
		457	case REQ_GROUP:
		458	req->int1 = 2; /* mark group as finished */
		459
		460	if (req->sv1)
		461	{
		462	int i;
		463	AV *av = (AV *)req->sv1;
		464
		465	EXTEND (SP, AvFILL (av) + 1);
		466	for (i = 0; i <= AvFILL (av); ++i)
		467	PUSHs (*av_fetch (av, i, 0));
		468	}
		469	break;
		470
		471	case REQ_NOP:
		472	case REQ_BUSY:
		473	break;
		474
		475	case REQ_READLINK:
		476	if (req->result > 0)
		477	{
		478	SvCUR_set (req->sv1, req->result);
		479	*SvEND (req->sv1) = 0;
		480	PUSHs (req->sv1);
		481	}
		482	break;
		483
		484	case REQ_STAT:
		485	case REQ_LSTAT:
		486	case REQ_FSTAT:
		487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		488	PL_laststatval = req->result;
		489	PL_statcache = *(Stat_t *)(req->ptr2);
		490	PUSHs (sv_2mortal (newSViv (req->result)));
		491	break;
		492
		493	case REQ_READ:
		494	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		495	*SvEND (req->sv1) = 0;
		496	PUSHs (sv_2mortal (newSViv (req->result)));
		497	break;
		498
		499	default:
		500	PUSHs (sv_2mortal (newSViv (req->result)));
		501	break;
		502	}
		503
		504	errno = req->errorno;
		505
		506	PUTBACK;
		507	call_sv (req->callback, G_VOID | G_EVAL);
		508	SPAGAIN;
		509
		510	FREETMPS;
		511	LEAVE;
188	}	512	}
189	}
190		513
191	static void req_invoke (aio_req req)	514	if (req->grp)
192	{
193	dSP;
194	int errorno = errno;
195
196	if (req->cancelled || !SvOK (req->callback))
197	return;
198
199	errno = req->errorno;
200
201	ENTER;
202	SAVETMPS;
203	PUSHMARK (SP);
204	EXTEND (SP, 1);
205
206	switch (req->type)
207	{	515	{
208	case REQ_READDIR:	516	aio_req grp = req->grp;
209	{
210	SV *rv = &PL_sv_undef;
211		517
212	if (req->result >= 0)	518	/* unlink request */
213	{	519	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
214	char *buf = req->data2ptr;	520	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
215	AV *av = newAV ();
216		521
217	while (req->result)	522	if (grp->grp_first == req)
218	{	523	grp->grp_first = req->grp_next;
219	SV *sv = newSVpv (buf, 0);
220		524
221	av_push (av, sv);	525	aio_grp_dec (grp);
222	buf += SvCUR (sv) + 1;
223	req->result--;
224	}
225
226	rv = sv_2mortal (newRV_noinc ((SV *)av));
227	}
228
229	PUSHs (rv);
230	}
231	break;
232
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_SLEEP:
265	break;
266
267	default:
268	PUSHs (sv_2mortal (newSViv (req->result)));
269	break;
270	}	526	}
271
272
273	PUTBACK;
274	call_sv (req->callback, G_VOID | G_EVAL);
275	SPAGAIN;
276
277	FREETMPS;
278	LEAVE;
279
280	errno = errorno;
281		527
282	if (SvTRUE (ERRSV))	528	if (SvTRUE (ERRSV))
283	{	529	{
284	req_free (req);	530	req_free (req);
285	croak (0);	531	croak (0);
286	}	532	}
287	}	533	}
288		534
289	static void req_free (aio_req req)	535	static void req_free (aio_req req)
290	{	536	{
291	if (req->grp)
292	{
293	aio_req grp = req->grp;
294
295	/* unlink request */
296	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
297	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
298
299	if (grp->grp_first == req)
300	grp->grp_first = req->grp_next;
301
302	aio_grp_dec (grp);
303	}
304
305	if (req->self)	537	if (req->self)
306	{	538	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	539	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	540	SvREFCNT_dec (req->self);
309	}	541	}
310		542
311	SvREFCNT_dec (req->data);
312	SvREFCNT_dec (req->fh);	543	SvREFCNT_dec (req->fh);
		544	SvREFCNT_dec (req->sv1);
313	SvREFCNT_dec (req->fh2);	545	SvREFCNT_dec (req->sv2);
314	SvREFCNT_dec (req->callback);	546	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);
316		547
317	if (req->type == REQ_READDIR && req->result >= 0)	548	if (req->flags & FLAG_PTR2_FREE)
318	free (req->data2ptr);	549	free (req->ptr2);
319		550
320	Safefree (req);	551	Safefree (req);
321	}	552	}
322		553
		554	static void req_cancel_subs (aio_req grp)
		555	{
		556	aio_req sub;
		557
		558	if (grp->type != REQ_GROUP)
		559	return;
		560
		561	SvREFCNT_dec (grp->sv2);
		562	grp->sv2 = 0;
		563
		564	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		565	req_cancel (sub);
		566	}
		567
323	static void req_cancel (aio_req req)	568	static void req_cancel (aio_req req)
324	{	569	{
325	req->cancelled = 1;	570	req->flags |= FLAG_CANCELLED;
326		571
327	if (req->type == REQ_GROUP)	572	req_cancel_subs (req);
328	{
329	aio_req sub;
330
331	for (sub = req->grp_first; sub; sub = sub->grp_next)
332	req_cancel (sub);
333	}
334	}
335
336	static int poll_cb ()
337	{
338	dSP;
339	int count = 0;
340	int do_croak = 0;
341	aio_req req;
342
343	for (;;)
344	{
345	pthread_mutex_lock (&reslock);
346	req = ress;
347
348	if (req)
349	{
350	ress = req->next;
351
352	if (!ress)
353	{
354	/* read any signals sent by the worker threads */
355	char buf [32];
356	while (read (respipe [0], buf, 32) == 32)
357	;
358
359	rese = 0;
360	}
361	}
362
363	pthread_mutex_unlock (&reslock);
364
365	if (!req)
366	break;
367
368	--nreqs;
369
370	if (req->type == REQ_QUIT)
371	started--;
372	else if (req->type == REQ_GROUP && req->length)
373	{
374	req->fd = 1; /* mark request as delayed */
375	continue;
376	}
377	else
378	{
379	if (req->type == REQ_READ)
380	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
381
382	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
383	SvREADONLY_off (req->data);
384
385	if (req->statdata)
386	{
387	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
388	PL_laststatval = req->result;
389	PL_statcache = *(req->statdata);
390	}
391
392	req_invoke (req);
393
394	count++;
395	}
396
397	req_free (req);
398	}
399
400	return count;
401	}	573	}
402		574
403	static void *aio_proc(void *arg);	575	static void *aio_proc(void *arg);
404		576
405	static void start_thread (void)	577	static void start_thread (void)
406	{	578	{
407	sigset_t fullsigset, oldsigset;	579	sigset_t fullsigset, oldsigset;
408	pthread_t tid;
409	pthread_attr_t attr;	580	pthread_attr_t attr;
		581
		582	worker *wrk = calloc (1, sizeof (worker));
		583
		584	if (!wrk)
		585	croak ("unable to allocate worker thread data");
410		586
411	pthread_attr_init (&attr);	587	pthread_attr_init (&attr);
412	pthread_attr_setstacksize (&attr, STACKSIZE);	588	pthread_attr_setstacksize (&attr, STACKSIZE);
413	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		590	#ifdef PTHREAD_SCOPE_PROCESS
		591	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		592	#endif
414		593
415	sigfillset (&fullsigset);	594	sigfillset (&fullsigset);
		595
		596	LOCK (wrklock);
416	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	597	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
417		598
418	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	599	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
419	started++;
420
421	sigprocmask (SIG_SETMASK, &oldsigset, 0);
422	}
423
424	static void req_send (aio_req req)
425	{
426	while (started < wanted && nreqs >= started)
427	start_thread ();
428
429	++nreqs;
430
431	pthread_mutex_lock (&reqlock);
432
433	req->next = 0;
434
435	if (reqe)
436	{	600	{
437	reqe->next = req;	601	wrk->prev = &wrk_first;
438	reqe = req;	602	wrk->next = wrk_first.next;
		603	wrk_first.next->prev = wrk;
		604	wrk_first.next = wrk;
		605	++started;
439	}	606	}
440	else	607	else
441	reqe = reqs = req;	608	free (wrk);
442		609
		610	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		611	UNLOCK (wrklock);
		612	}
		613
		614	static void maybe_start_thread ()
		615	{
		616	if (get_nthreads () >= wanted)
		617	return;
		618
		619	/* todo: maybe use idle here, but might be less exact */
		620	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		621	return;
		622
		623	start_thread ();
		624	}
		625
		626	static void req_send (aio_req req)
		627	{
		628	++nreqs;
		629
		630	LOCK (reqlock);
		631	++nready;
		632	reqq_push (&req_queue, req);
443	pthread_cond_signal (&reqwait);	633	pthread_cond_signal (&reqwait);
444	pthread_mutex_unlock (&reqlock);	634	UNLOCK (reqlock);
445		635
446	if (nreqs > max_outstanding)	636	maybe_start_thread ();
447	for (;;)
448	{
449	poll_cb ();
450
451	if (nreqs <= max_outstanding)
452	break;
453
454	poll_wait ();
455	}
456	}	637	}
457		638
458	static void end_thread (void)	639	static void end_thread (void)
459	{	640	{
460	aio_req req;	641	aio_req req;
		642
461	Newz (0, req, 1, aio_cb);	643	Newz (0, req, 1, aio_cb);
		644
462	req->type = REQ_QUIT;	645	req->type = REQ_QUIT;
		646	req->pri = PRI_MAX + PRI_BIAS;
463		647
464	req_send (req);	648	LOCK (reqlock);
		649	reqq_push (&req_queue, req);
		650	pthread_cond_signal (&reqwait);
		651	UNLOCK (reqlock);
		652
		653	LOCK (wrklock);
		654	--started;
		655	UNLOCK (wrklock);
		656	}
		657
		658	static void set_max_idle (int nthreads)
		659	{
		660	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		661	max_idle = nthreads <= 0 ? 1 : nthreads;
		662	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
465	}	663	}
466		664
467	static void min_parallel (int nthreads)	665	static void min_parallel (int nthreads)
468	{	666	{
469	if (wanted < nthreads)	667	if (wanted < nthreads)
470	wanted = nthreads;	668	wanted = nthreads;
471	}	669	}
472		670
473	static void max_parallel (int nthreads)	671	static void max_parallel (int nthreads)
474	{	672	{
475	int cur = started;
476
477	if (wanted > nthreads)	673	if (wanted > nthreads)
478	wanted = nthreads;	674	wanted = nthreads;
479		675
480	while (cur > wanted)	676	while (started > wanted)
		677	end_thread ();
		678	}
		679
		680	static void poll_wait ()
		681	{
		682	fd_set rfd;
		683
		684	while (nreqs)
481	{	685	{
		686	int size;
		687	if (WORDACCESS_UNSAFE) LOCK (reslock);
		688	size = res_queue.size;
		689	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		690
		691	if (size)
		692	return;
		693
482	end_thread ();	694	maybe_start_thread ();
483	cur--;	695
		696	FD_ZERO(&rfd);
		697	FD_SET(respipe [0], &rfd);
		698
		699	select (respipe [0] + 1, &rfd, 0, 0, 0);
484	}	700	}
		701	}
485		702
486	while (started > wanted)	703	static int poll_cb ()
		704	{
		705	dSP;
		706	int count = 0;
		707	int maxreqs = max_poll_reqs;
		708	int do_croak = 0;
		709	struct timeval tv_start, tv_now;
		710	aio_req req;
		711
		712	if (max_poll_time)
		713	gettimeofday (&tv_start, 0);
		714
		715	for (;;)
487	{	716	{
		717	for (;;)
		718	{
		719	maybe_start_thread ();
		720
		721	LOCK (reslock);
		722	req = reqq_shift (&res_queue);
		723
		724	if (req)
		725	{
		726	--npending;
		727
		728	if (!res_queue.size)
		729	{
		730	/* read any signals sent by the worker threads */
		731	char buf [32];
		732	while (read (respipe [0], buf, 32) == 32)
		733	;
		734	}
		735	}
		736
		737	UNLOCK (reslock);
		738
		739	if (!req)
		740	break;
		741
		742	--nreqs;
		743
		744	if (req->type == REQ_GROUP && req->size)
		745	{
		746	req->int1 = 1; /* mark request as delayed */
		747	continue;
		748	}
		749	else
		750	{
		751	req_invoke (req);
		752
		753	count++;
		754	}
		755
		756	req_free (req);
		757
		758	if (maxreqs && !--maxreqs)
		759	break;
		760
		761	if (max_poll_time)
		762	{
		763	gettimeofday (&tv_now, 0);
		764
		765	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		766	break;
		767	}
		768	}
		769
		770	if (nreqs <= max_outstanding)
		771	break;
		772
488	poll_wait ();	773	poll_wait ();
489	poll_cb ();	774
		775	++maxreqs;
490	}	776	}
		777
		778	return count;
491	}	779	}
492		780
493	static void create_pipe ()	781	static void create_pipe ()
494	{	782	{
495	if (pipe (respipe))	783	if (pipe (respipe))
…		…
519	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	807	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
520	{	808	{
521	ssize_t res;	809	ssize_t res;
522	off_t ooffset;	810	off_t ooffset;
523		811
524	pthread_mutex_lock (&preadwritelock);	812	LOCK (preadwritelock);
525	ooffset = lseek (fd, 0, SEEK_CUR);	813	ooffset = lseek (fd, 0, SEEK_CUR);
526	lseek (fd, offset, SEEK_SET);	814	lseek (fd, offset, SEEK_SET);
527	res = read (fd, buf, count);	815	res = read (fd, buf, count);
528	lseek (fd, ooffset, SEEK_SET);	816	lseek (fd, ooffset, SEEK_SET);
529	pthread_mutex_unlock (&preadwritelock);	817	UNLOCK (preadwritelock);
530		818
531	return res;	819	return res;
532	}	820	}
533		821
534	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	822	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
535	{	823	{
536	ssize_t res;	824	ssize_t res;
537	off_t ooffset;	825	off_t ooffset;
538		826
539	pthread_mutex_lock (&preadwritelock);	827	LOCK (preadwritelock);
540	ooffset = lseek (fd, 0, SEEK_CUR);	828	ooffset = lseek (fd, 0, SEEK_CUR);
541	lseek (fd, offset, SEEK_SET);	829	lseek (fd, offset, SEEK_SET);
542	res = write (fd, buf, count);	830	res = write (fd, buf, count);
543	lseek (fd, offset, SEEK_SET);	831	lseek (fd, offset, SEEK_SET);
544	pthread_mutex_unlock (&preadwritelock);	832	UNLOCK (preadwritelock);
545		833
546	return res;	834	return res;
547	}	835	}
548	#endif	836	#endif
549		837
550	#if !HAVE_FDATASYNC	838	#if !HAVE_FDATASYNC
551	# define fdatasync fsync	839	# define fdatasync fsync
552	#endif	840	#endif
553		841
554	#if !HAVE_READAHEAD	842	#if !HAVE_READAHEAD
555	# define readahead aio_readahead	843	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
556		844
557	static ssize_t readahead (int fd, off_t offset, size_t count)	845	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
558	{	846	{
559	char readahead_buf[4096];	847	dBUF;
560		848
561	while (count > 0)	849	while (count > 0)
562	{	850	{
563	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	851	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
564		852
565	pread (fd, readahead_buf, len, offset);	853	pread (fd, aio_buf, len, offset);
566	offset += len;	854	offset += len;
567	count -= len;	855	count -= len;
568	}	856	}
569		857
570	errno = 0;	858	errno = 0;
571	}	859	}
		860
572	#endif	861	#endif
573		862
574	#if !HAVE_READDIR_R	863	#if !HAVE_READDIR_R
575	# define readdir_r aio_readdir_r	864	# define readdir_r aio_readdir_r
576		865
…		…
579	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	868	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
580	{	869	{
581	struct dirent *e;	870	struct dirent *e;
582	int errorno;	871	int errorno;
583		872
584	pthread_mutex_lock (&readdirlock);	873	LOCK (readdirlock);
585		874
586	e = readdir (dirp);	875	e = readdir (dirp);
587	errorno = errno;	876	errorno = errno;
588		877
589	if (e)	878	if (e)
…		…
592	strcpy (ent->d_name, e->d_name);	881	strcpy (ent->d_name, e->d_name);
593	}	882	}
594	else	883	else
595	*res = 0;	884	*res = 0;
596		885
597	pthread_mutex_unlock (&readdirlock);	886	UNLOCK (readdirlock);
598		887
599	errno = errorno;	888	errno = errorno;
600	return e ? 0 : -1;	889	return e ? 0 : -1;
601	}	890	}
602	#endif	891	#endif
603		892
604	/* sendfile always needs emulation */	893	/* sendfile always needs emulation */
605	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	894	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
606	{	895	{
607	ssize_t res;	896	ssize_t res;
608		897
609	if (!count)	898	if (!count)
610	return 0;	899	return 0;
…		…
621	{	910	{
622	off_t sbytes;	911	off_t sbytes;
623	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	912	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
624		913
625	if (res < 0 && sbytes)	914	if (res < 0 && sbytes)
626	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	915	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
627	res = sbytes;	916	res = sbytes;
628	}	917	}
629		918
630	# elif __hpux	919	# elif __hpux
631	res = sendfile (ofd, ifd, offset, count, 0, 0);	920	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
659	#endif	948	#endif
660	)	949	)
661	)	950	)
662	{	951	{
663	/* emulate sendfile. this is a major pain in the ass */	952	/* emulate sendfile. this is a major pain in the ass */
664	char buf[4096];	953	dBUF;
		954
665	res = 0;	955	res = 0;
666		956
667	while (count)	957	while (count)
668	{	958	{
669	ssize_t cnt;	959	ssize_t cnt;
670		960
671	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	961	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
672		962
673	if (cnt <= 0)	963	if (cnt <= 0)
674	{	964	{
675	if (cnt && !res) res = -1;	965	if (cnt && !res) res = -1;
676	break;	966	break;
677	}	967	}
678		968
679	cnt = write (ofd, buf, cnt);	969	cnt = write (ofd, aio_buf, cnt);
680		970
681	if (cnt <= 0)	971	if (cnt <= 0)
682	{	972	{
683	if (cnt && !res) res = -1;	973	if (cnt && !res) res = -1;
684	break;	974	break;
…		…
692		982
693	return res;	983	return res;
694	}	984	}
695		985
696	/* read a full directory */	986	/* read a full directory */
697	static int scandir_ (const char *path, void **namesp)	987	static void scandir_ (aio_req req, worker *self)
698	{	988	{
699	DIR *dirp = opendir (path);	989	DIR *dirp;
700	union	990	union
701	{	991	{
702	struct dirent d;	992	struct dirent d;
703	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	993	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
704	} u;	994	} *u;
705	struct dirent *entp;	995	struct dirent *entp;
706	char *name, *names;	996	char *name, *names;
707	int memlen = 4096;	997	int memlen = 4096;
708	int memofs = 0;	998	int memofs = 0;
709	int res = 0;	999	int res = 0;
710	int errorno;	1000	int errorno;
711		1001
712	if (!dirp)	1002	LOCK (wrklock);
713	return -1;	1003	self->dirp = dirp = opendir (req->ptr1);
714		1004	self->dbuf = u = malloc (sizeof (*u));
		1005	req->flags |= FLAG_PTR2_FREE;
715	names = malloc (memlen);	1006	req->ptr2 = names = malloc (memlen);
		1007	UNLOCK (wrklock);
		1008
		1009	if (dirp && u && names)
		1010	for (;;)
		1011	{
		1012	errno = 0;
		1013	readdir_r (dirp, &u->d, &entp);
		1014
		1015	if (!entp)
		1016	break;
		1017
		1018	name = entp->d_name;
		1019
		1020	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1021	{
		1022	int len = strlen (name) + 1;
		1023
		1024	res++;
		1025
		1026	while (memofs + len > memlen)
		1027	{
		1028	memlen *= 2;
		1029	LOCK (wrklock);
		1030	req->ptr2 = names = realloc (names, memlen);
		1031	UNLOCK (wrklock);
		1032
		1033	if (!names)
		1034	break;
		1035	}
		1036
		1037	memcpy (names + memofs, name, len);
		1038	memofs += len;
		1039	}
		1040	}
		1041
		1042	if (errno)
		1043	res = -1;
		1044
		1045	req->result = res;
		1046	}
		1047
		1048	/*****************************************************************************/
		1049
		1050	static void *aio_proc (void *thr_arg)
		1051	{
		1052	aio_req req;
		1053	struct timespec ts;
		1054	worker *self = (worker *)thr_arg;
		1055
		1056	/* try to distribute timeouts somewhat evenly */
		1057	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1058	* (1000000000UL / 1024UL);
716		1059
717	for (;;)	1060	for (;;)
718	{	1061	{
719	errno = 0, readdir_r (dirp, &u.d, &entp);	1062	ts.tv_sec = time (0) + IDLE_TIMEOUT;
720		1063
721	if (!entp)	1064	LOCK (reqlock);
722	break;
723
724	name = entp->d_name;
725
726	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
727	{
728	int len = strlen (name) + 1;
729
730	res++;
731
732	while (memofs + len > memlen)
733	{
734	memlen *= 2;
735	names = realloc (names, memlen);
736	if (!names)
737	break;
738	}
739
740	memcpy (names + memofs, name, len);
741	memofs += len;
742	}
743	}
744
745	errorno = errno;
746	closedir (dirp);
747
748	if (errorno)
749	{
750	free (names);
751	errno = errorno;
752	res = -1;
753	}
754
755	*namesp = (void *)names;
756	return res;
757	}
758
759	/*****************************************************************************/
760
761	static void *aio_proc (void *thr_arg)
762	{
763	aio_req req;
764	int type;
765
766	do
767	{
768	pthread_mutex_lock (&reqlock);
769		1065
770	for (;;)	1066	for (;;)
771	{	1067	{
772	req = reqs;	1068	self->req = req = reqq_shift (&req_queue);
773
774	if (reqs)
775	{
776	reqs = reqs->next;
777	if (!reqs) reqe = 0;
778	}
779		1069
780	if (req)	1070	if (req)
781	break;	1071	break;
782		1072
		1073	++idle;
		1074
		1075	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1076	== ETIMEDOUT)
		1077	{
		1078	if (idle > max_idle)
		1079	{
		1080	--idle;
		1081	UNLOCK (reqlock);
		1082	LOCK (wrklock);
		1083	--started;
		1084	UNLOCK (wrklock);
		1085	goto quit;
		1086	}
		1087
		1088	/* we are allowed to idle, so do so without any timeout */
783	pthread_cond_wait (&reqwait, &reqlock);	1089	pthread_cond_wait (&reqwait, &reqlock);
		1090	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1091	}
		1092
		1093	--idle;
784	}	1094	}
785		1095
786	pthread_mutex_unlock (&reqlock);	1096	--nready;
		1097
		1098	UNLOCK (reqlock);
787		1099
788	errno = 0; /* strictly unnecessary */	1100	errno = 0; /* strictly unnecessary */
789		1101
790	if (!req->cancelled)	1102	if (!(req->flags & FLAG_CANCELLED))
791	switch (type = req->type) /* remember type for QUIT check */	1103	switch (req->type)
792	{	1104	{
793	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1105	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
794	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1106	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
795		1107
796	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1108	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
797	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1109	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
798		1110
799	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1111	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
800	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1112	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
801	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1113	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
802		1114
803	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1115	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
804	case REQ_CLOSE: req->result = close (req->fd); break;	1116	case REQ_CLOSE: req->result = close (req->int1); break;
805	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1117	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
806	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1118	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
807	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
808	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
809	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
810		1124
811	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
812	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
813	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
814		1128
815	case REQ_SLEEP:	1129	case REQ_BUSY:
816	{	1130	{
817	struct timeval tv;	1131	struct timeval tv;
818		1132
819	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
820	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
821		1135
822	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
823	}	1137	}
824		1138
		1139	case REQ_GROUP:
		1140	case REQ_NOP:
		1141	break;
		1142
825	case REQ_QUIT:	1143	case REQ_QUIT:
826	break;	1144	goto quit;
827		1145
828	default:	1146	default:
829	req->result = ENOSYS;	1147	req->result = ENOSYS;
830	break;	1148	break;
831	}	1149	}
832		1150
833	req->errorno = errno;	1151	req->errorno = errno;
834		1152
835	pthread_mutex_lock (&reslock);	1153	LOCK (reslock);
836		1154
837	req->next = 0;	1155	++npending;
838		1156
839	if (rese)	1157	if (!reqq_push (&res_queue, req))
840	{
841	rese->next = req;
842	rese = req;
843	}
844	else
845	{
846	rese = ress = req;
847
848	/* write a dummy byte to the pipe so fh becomes ready */	1158	/* write a dummy byte to the pipe so fh becomes ready */
849	write (respipe [1], &respipe, 1);	1159	write (respipe [1], &respipe, 1);
850	}
851		1160
852	pthread_mutex_unlock (&reslock);	1161	self->req = 0;
		1162	worker_clear (self);
		1163
		1164	UNLOCK (reslock);
853	}	1165	}
854	while (type != REQ_QUIT);	1166
		1167	quit:
		1168	LOCK (wrklock);
		1169	worker_free (self);
		1170	UNLOCK (wrklock);
855		1171
856	return 0;	1172	return 0;
857	}	1173	}
858		1174
859	/*****************************************************************************/	1175	/*****************************************************************************/
860		1176
861	static void atfork_prepare (void)	1177	static void atfork_prepare (void)
862	{	1178	{
863	pthread_mutex_lock (&reqlock);	1179	LOCK (wrklock);
864	pthread_mutex_lock (&reslock);	1180	LOCK (reqlock);
		1181	LOCK (reslock);
865	#if !HAVE_PREADWRITE	1182	#if !HAVE_PREADWRITE
866	pthread_mutex_lock (&preadwritelock);	1183	LOCK (preadwritelock);
867	#endif	1184	#endif
868	#if !HAVE_READDIR_R	1185	#if !HAVE_READDIR_R
869	pthread_mutex_lock (&readdirlock);	1186	LOCK (readdirlock);
870	#endif	1187	#endif
871	}	1188	}
872		1189
873	static void atfork_parent (void)	1190	static void atfork_parent (void)
874	{	1191	{
875	#if !HAVE_READDIR_R	1192	#if !HAVE_READDIR_R
876	pthread_mutex_unlock (&readdirlock);	1193	UNLOCK (readdirlock);
877	#endif	1194	#endif
878	#if !HAVE_PREADWRITE	1195	#if !HAVE_PREADWRITE
879	pthread_mutex_unlock (&preadwritelock);	1196	UNLOCK (preadwritelock);
880	#endif	1197	#endif
881	pthread_mutex_unlock (&reslock);	1198	UNLOCK (reslock);
882	pthread_mutex_unlock (&reqlock);	1199	UNLOCK (reqlock);
		1200	UNLOCK (wrklock);
883	}	1201	}
884		1202
885	static void atfork_child (void)	1203	static void atfork_child (void)
886	{	1204	{
887	aio_req prv;	1205	aio_req prv;
888		1206
889	started = 0;	1207	while (prv = reqq_shift (&req_queue))
		1208	req_free (prv);
890		1209
891	while (reqs)	1210	while (prv = reqq_shift (&res_queue))
		1211	req_free (prv);
		1212
		1213	while (wrk_first.next != &wrk_first)
892	{	1214	{
893	prv = reqs;	1215	worker *wrk = wrk_first.next;
894	reqs = prv->next;	1216
		1217	if (wrk->req)
		1218	req_free (wrk->req);
		1219
		1220	worker_clear (wrk);
895	req_free (prv);	1221	worker_free (wrk);
896	}	1222	}
897		1223
898	reqs = reqe = 0;	1224	started = 0;
899		1225	idle = 0;
900	while (ress)	1226	nreqs = 0;
901	{	1227	nready = 0;
902	prv = ress;	1228	npending = 0;
903	ress = prv->next;
904	req_free (prv);
905	}
906
907	ress = rese = 0;
908		1229
909	close (respipe [0]);	1230	close (respipe [0]);
910	close (respipe [1]);	1231	close (respipe [1]);
911	create_pipe ();	1232	create_pipe ();
912		1233
913	atfork_parent ();	1234	atfork_parent ();
914	}	1235	}
915		1236
916	#define dREQ \	1237	#define dREQ \
917	aio_req req; \	1238	aio_req req; \
		1239	int req_pri = next_pri; \
		1240	next_pri = DEFAULT_PRI + PRI_BIAS; \
918	\	1241	\
919	if (SvOK (callback) && !SvROK (callback)) \	1242	if (SvOK (callback) && !SvROK (callback)) \
920	croak ("callback must be undef or of reference type"); \	1243	croak ("callback must be undef or of reference type"); \
921	\	1244	\
922	Newz (0, req, 1, aio_cb); \	1245	Newz (0, req, 1, aio_cb); \
923	if (!req) \	1246	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	1247	croak ("out of memory during aio_req allocation"); \
925	\	1248	\
926	req->callback = newSVsv (callback)	1249	req->callback = newSVsv (callback); \
		1250	req->pri = req_pri
927		1251
928	#define REQ_SEND \	1252	#define REQ_SEND \
929	req_send (req); \	1253	req_send (req); \
930	\	1254	\
931	if (GIMME_V != G_VOID) \	1255	if (GIMME_V != G_VOID) \
…		…
936	PROTOTYPES: ENABLE	1260	PROTOTYPES: ENABLE
937		1261
938	BOOT:	1262	BOOT:
939	{	1263	{
940	HV *stash = gv_stashpv ("IO::AIO", 1);	1264	HV *stash = gv_stashpv ("IO::AIO", 1);
		1265
941	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1266	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
942	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1267	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
943	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1268	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1269	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1270	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1271	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
944		1272
945	create_pipe ();	1273	create_pipe ();
946	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1274	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
947	}	1275	}
948		1276
949	void	1277	void
950	min_parallel (nthreads)	1278	max_poll_reqs (int nreqs)
951	int nthreads
952	PROTOTYPE: $	1279	PROTOTYPE: $
		1280	CODE:
		1281	max_poll_reqs = nreqs;
953		1282
954	void	1283	void
955	max_parallel (nthreads)	1284	max_poll_time (double nseconds)
956	int nthreads
957	PROTOTYPE: $	1285	PROTOTYPE: $
		1286	CODE:
		1287	max_poll_time = nseconds * AIO_TICKS;
		1288
		1289	void
		1290	min_parallel (int nthreads)
		1291	PROTOTYPE: $
		1292
		1293	void
		1294	max_parallel (int nthreads)
		1295	PROTOTYPE: $
		1296
		1297	void
		1298	max_idle (int nthreads)
		1299	PROTOTYPE: $
		1300	CODE:
		1301	set_max_idle (nthreads);
958		1302
959	int	1303	int
960	max_outstanding (nreqs)	1304	max_outstanding (int maxreqs)
961	int nreqs	1305	PROTOTYPE: $
962	PROTOTYPE: $
963	CODE:	1306	CODE:
964	RETVAL = max_outstanding;	1307	RETVAL = max_outstanding;
965	max_outstanding = nreqs;	1308	max_outstanding = maxreqs;
		1309	OUTPUT:
		1310	RETVAL
966		1311
967	void	1312	void
968	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1313	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
969	SV * pathname	1314	SV * pathname
970	int flags	1315	int flags
…		…
974	PPCODE:	1319	PPCODE:
975	{	1320	{
976	dREQ;	1321	dREQ;
977		1322
978	req->type = REQ_OPEN;	1323	req->type = REQ_OPEN;
979	req->data = newSVsv (pathname);	1324	req->sv1 = newSVsv (pathname);
980	req->dataptr = SvPVbyte_nolen (req->data);	1325	req->ptr1 = SvPVbyte_nolen (pathname);
981	req->fd = flags;	1326	req->int1 = flags;
982	req->mode = mode;	1327	req->mode = mode;
983		1328
984	REQ_SEND;	1329	REQ_SEND;
985	}	1330	}
986		1331
…		…
996	PPCODE:	1341	PPCODE:
997	{	1342	{
998	dREQ;	1343	dREQ;
999		1344
1000	req->type = ix;	1345	req->type = ix;
1001	req->fh = newSVsv (fh);	1346	req->fh = newSVsv (fh);
1002	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1347	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1003		1348
1004	REQ_SEND (req);	1349	REQ_SEND (req);
1005	}	1350	}
1006		1351
1007	void	1352	void
…		…
1016	aio_read = REQ_READ	1361	aio_read = REQ_READ
1017	aio_write = REQ_WRITE	1362	aio_write = REQ_WRITE
1018	PROTOTYPE: $$$$$;$	1363	PROTOTYPE: $$$$$;$
1019	PPCODE:	1364	PPCODE:
1020	{	1365	{
1021	aio_req req;
1022	STRLEN svlen;	1366	STRLEN svlen;
1023	char *svptr = SvPVbyte (data, svlen);	1367	char *svptr = SvPVbyte (data, svlen);
1024		1368
1025	SvUPGRADE (data, SVt_PV);	1369	SvUPGRADE (data, SVt_PV);
1026	SvPOK_on (data);	1370	SvPOK_on (data);
…		…
1048		1392
1049	{	1393	{
1050	dREQ;	1394	dREQ;
1051		1395
1052	req->type = ix;	1396	req->type = ix;
1053	req->fh = newSVsv (fh);	1397	req->fh = newSVsv (fh);
1054	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1398	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1055	: IoOFP (sv_2io (fh)));	1399	: IoOFP (sv_2io (fh)));
1056	req->offset = offset;	1400	req->offs = offset;
1057	req->length = length;	1401	req->size = length;
1058	req->data = SvREFCNT_inc (data);	1402	req->sv1 = SvREFCNT_inc (data);
1059	req->dataptr = (char *)svptr + dataoffset;	1403	req->ptr1 = (char *)svptr + dataoffset;
		1404	req->stroffset = dataoffset;
1060		1405
1061	if (!SvREADONLY (data))	1406	if (!SvREADONLY (data))
1062	{	1407	{
1063	SvREADONLY_on (data);	1408	SvREADONLY_on (data);
1064	req->data2ptr = (void *)data;	1409	req->flags |= FLAG_SV1_RO_OFF;
1065	}	1410	}
1066		1411
1067	REQ_SEND;	1412	REQ_SEND;
1068	}	1413	}
		1414	}
		1415
		1416	void
		1417	aio_readlink (path,callback=&PL_sv_undef)
		1418	SV * path
		1419	SV * callback
		1420	PROTOTYPE: $$;$
		1421	PPCODE:
		1422	{
		1423	SV *data;
		1424	dREQ;
		1425
		1426	data = newSV (NAME_MAX);
		1427	SvPOK_on (data);
		1428
		1429	req->type = REQ_READLINK;
		1430	req->fh = newSVsv (path);
		1431	req->ptr2 = SvPVbyte_nolen (path);
		1432	req->sv1 = data;
		1433	req->ptr1 = SvPVbyte_nolen (data);
		1434
		1435	REQ_SEND;
1069	}	1436	}
1070		1437
1071	void	1438	void
1072	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1439	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1073	SV * out_fh	1440	SV * out_fh
…		…
1079	PPCODE:	1446	PPCODE:
1080	{	1447	{
1081	dREQ;	1448	dREQ;
1082		1449
1083	req->type = REQ_SENDFILE;	1450	req->type = REQ_SENDFILE;
1084	req->fh = newSVsv (out_fh);	1451	req->fh = newSVsv (out_fh);
1085	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1452	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1086	req->fh2 = newSVsv (in_fh);	1453	req->sv2 = newSVsv (in_fh);
1087	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1454	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1088	req->offset = in_offset;	1455	req->offs = in_offset;
1089	req->length = length;	1456	req->size = length;
1090		1457
1091	REQ_SEND;	1458	REQ_SEND;
1092	}	1459	}
1093		1460
1094	void	1461	void
…		…
1101	PPCODE:	1468	PPCODE:
1102	{	1469	{
1103	dREQ;	1470	dREQ;
1104		1471
1105	req->type = REQ_READAHEAD;	1472	req->type = REQ_READAHEAD;
1106	req->fh = newSVsv (fh);	1473	req->fh = newSVsv (fh);
1107	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1474	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1108	req->offset = offset;	1475	req->offs = offset;
1109	req->length = length;	1476	req->size = length;
1110		1477
1111	REQ_SEND;	1478	REQ_SEND;
1112	}	1479	}
1113		1480
1114	void	1481	void
…		…
1120	aio_lstat = REQ_LSTAT	1487	aio_lstat = REQ_LSTAT
1121	PPCODE:	1488	PPCODE:
1122	{	1489	{
1123	dREQ;	1490	dREQ;
1124		1491
1125	New (0, req->statdata, 1, Stat_t);	1492	req->ptr2 = malloc (sizeof (Stat_t));
1126	if (!req->statdata)	1493	if (!req->ptr2)
1127	{	1494	{
1128	req_free (req);	1495	req_free (req);
1129	croak ("out of memory during aio_req->statdata allocation");	1496	croak ("out of memory during aio_stat statdata allocation");
1130	}	1497	}
		1498
		1499	req->flags |= FLAG_PTR2_FREE;
1131		1500
1132	if (SvPOK (fh_or_path))	1501	if (SvPOK (fh_or_path))
1133	{	1502	{
1134	req->type = ix;	1503	req->type = ix;
1135	req->data = newSVsv (fh_or_path);	1504	req->sv1 = newSVsv (fh_or_path);
1136	req->dataptr = SvPVbyte_nolen (req->data);	1505	req->ptr1 = SvPVbyte_nolen (fh_or_path);
1137	}	1506	}
1138	else	1507	else
1139	{	1508	{
1140	req->type = REQ_FSTAT;	1509	req->type = REQ_FSTAT;
1141	req->fh = newSVsv (fh_or_path);	1510	req->fh = newSVsv (fh_or_path);
1142	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1511	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1143	}	1512	}
1144		1513
1145	REQ_SEND;	1514	REQ_SEND;
1146	}	1515	}
1147		1516
1148	void	1517	void
1149	aio_unlink (pathname,callback=&PL_sv_undef)	1518	aio_unlink (pathname,callback=&PL_sv_undef)
1150	SV * pathname	1519	SV * pathname
1151	SV * callback	1520	SV * callback
1152	ALIAS:	1521	ALIAS:
1153	aio_unlink = REQ_UNLINK	1522	aio_unlink = REQ_UNLINK
1154	aio_rmdir = REQ_RMDIR	1523	aio_rmdir = REQ_RMDIR
1155	aio_readdir = REQ_READDIR	1524	aio_readdir = REQ_READDIR
1156	PPCODE:	1525	PPCODE:
1157	{	1526	{
1158	dREQ;	1527	dREQ;
1159		1528
1160	req->type = ix;	1529	req->type = ix;
1161	req->data = newSVsv (pathname);	1530	req->sv1 = newSVsv (pathname);
1162	req->dataptr = SvPVbyte_nolen (req->data);	1531	req->ptr1 = SvPVbyte_nolen (pathname);
1163		1532
1164	REQ_SEND;	1533	REQ_SEND;
1165	}	1534	}
1166		1535
1167	void	1536	void
1168	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1537	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1169	SV * oldpath	1538	SV * oldpath
1170	SV * newpath	1539	SV * newpath
1171	SV * callback	1540	SV * callback
1172	ALIAS:	1541	ALIAS:
1173	aio_link = REQ_LINK	1542	aio_link = REQ_LINK
1174	aio_symlink = REQ_SYMLINK	1543	aio_symlink = REQ_SYMLINK
1175	aio_rename = REQ_RENAME	1544	aio_rename = REQ_RENAME
1176	PPCODE:	1545	PPCODE:
1177	{	1546	{
1178	dREQ;	1547	dREQ;
1179		1548
1180	req->type = ix;	1549	req->type = ix;
1181	req->fh = newSVsv (oldpath);	1550	req->fh = newSVsv (oldpath);
1182	req->data2ptr = SvPVbyte_nolen (req->fh);	1551	req->ptr2 = SvPVbyte_nolen (req->fh);
1183	req->data = newSVsv (newpath);	1552	req->sv1 = newSVsv (newpath);
1184	req->dataptr = SvPVbyte_nolen (req->data);	1553	req->ptr1 = SvPVbyte_nolen (newpath);
1185		1554
1186	REQ_SEND;	1555	REQ_SEND;
1187	}	1556	}
1188		1557
1189	void	1558	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	1559	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1191	double delay	1560	SV * pathname
1192	SV * callback	1561	SV * callback
		1562	UV mode
		1563	UV dev
1193	PPCODE:	1564	PPCODE:
1194	{	1565	{
1195	dREQ;	1566	dREQ;
		1567
		1568	req->type = REQ_MKNOD;
		1569	req->sv1 = newSVsv (pathname);
		1570	req->ptr1 = SvPVbyte_nolen (pathname);
		1571	req->mode = (mode_t)mode;
		1572	req->offs = dev;
		1573
		1574	REQ_SEND;
		1575	}
1196		1576
		1577	void
		1578	aio_busy (delay,callback=&PL_sv_undef)
		1579	double delay
		1580	SV * callback
		1581	PPCODE:
		1582	{
		1583	dREQ;
		1584
1197	req->type = REQ_SLEEP;	1585	req->type = REQ_BUSY;
1198	req->fd = delay < 0. ? 0 : delay;	1586	req->int1 = delay < 0. ? 0 : delay;
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1587	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1200		1588
1201	REQ_SEND;	1589	REQ_SEND;
1202	}	1590	}
1203		1591
1204	void	1592	void
…		…
1206	SV * callback	1594	SV * callback
1207	PROTOTYPE: ;$	1595	PROTOTYPE: ;$
1208	PPCODE:	1596	PPCODE:
1209	{	1597	{
1210	dREQ;	1598	dREQ;
		1599
1211	req->type = REQ_GROUP;	1600	req->type = REQ_GROUP;
		1601
1212	req_send (req);	1602	req_send (req);
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1603	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1214	}	1604	}
		1605
		1606	void
		1607	aio_nop (callback=&PL_sv_undef)
		1608	SV * callback
		1609	PPCODE:
		1610	{
		1611	dREQ;
		1612
		1613	req->type = REQ_NOP;
		1614
		1615	REQ_SEND;
		1616	}
		1617
		1618	int
		1619	aioreq_pri (int pri = 0)
		1620	PROTOTYPE: ;$
		1621	CODE:
		1622	RETVAL = next_pri - PRI_BIAS;
		1623	if (items > 0)
		1624	{
		1625	if (pri < PRI_MIN) pri = PRI_MIN;
		1626	if (pri > PRI_MAX) pri = PRI_MAX;
		1627	next_pri = pri + PRI_BIAS;
		1628	}
		1629	OUTPUT:
		1630	RETVAL
		1631
		1632	void
		1633	aioreq_nice (int nice = 0)
		1634	CODE:
		1635	nice = next_pri - nice;
		1636	if (nice < PRI_MIN) nice = PRI_MIN;
		1637	if (nice > PRI_MAX) nice = PRI_MAX;
		1638	next_pri = nice + PRI_BIAS;
1215		1639
1216	void	1640	void
1217	flush ()	1641	flush ()
1218	PROTOTYPE:	1642	PROTOTYPE:
1219	CODE:	1643	CODE:
1220	while (nreqs)	1644	while (nreqs)
1221	{	1645	{
1222	poll_wait ();	1646	poll_wait ();
1223	poll_cb ();	1647	poll_cb (0);
1224	}	1648	}
1225		1649
1226	void	1650	void
1227	poll()	1651	poll()
1228	PROTOTYPE:	1652	PROTOTYPE:
1229	CODE:	1653	CODE:
1230	if (nreqs)	1654	if (nreqs)
1231	{	1655	{
1232	poll_wait ();	1656	poll_wait ();
1233	poll_cb ();	1657	poll_cb (0);
1234	}	1658	}
1235		1659
1236	int	1660	int
1237	poll_fileno()	1661	poll_fileno()
1238	PROTOTYPE:	1662	PROTOTYPE:
…		…
1262	CODE:	1686	CODE:
1263	RETVAL = nreqs;	1687	RETVAL = nreqs;
1264	OUTPUT:	1688	OUTPUT:
1265	RETVAL	1689	RETVAL
1266		1690
1267	PROTOTYPES: DISABLE	1691	int
1268		1692	nready()
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270
1271	void
1272	cancel (aio_req_ornot req)
1273	PROTOTYPE:	1693	PROTOTYPE:
1274	CODE:	1694	CODE:
		1695	RETVAL = get_nready ();
		1696	OUTPUT:
		1697	RETVAL
		1698
		1699	int
		1700	npending()
		1701	PROTOTYPE:
		1702	CODE:
		1703	RETVAL = get_npending ();
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	nthreads()
		1709	PROTOTYPE:
		1710	CODE:
		1711	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1712	RETVAL = started;
		1713	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1714	OUTPUT:
		1715	RETVAL
		1716
		1717	PROTOTYPES: DISABLE
		1718
		1719	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1720
		1721	void
		1722	cancel (aio_req_ornot req)
		1723	CODE:
1275	req_cancel (req);	1724	req_cancel (req);
		1725
		1726	void
		1727	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1728	CODE:
		1729	SvREFCNT_dec (req->callback);
		1730	req->callback = newSVsv (callback);
1276		1731
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1732	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1733
1279	void	1734	void
1280	add (aio_req grp, ...)	1735	add (aio_req grp, ...)
1281	PPCODE:	1736	PPCODE:
1282	{	1737	{
1283	int i;	1738	int i;
1284	aio_req req;	1739	aio_req req;
1285		1740
1286	if (grp->fd == 2)	1741	if (grp->int1 == 2)
1287	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1742	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1288		1743
1289	for (i = 1; i < items; ++i )	1744	for (i = 1; i < items; ++i )
1290	{	1745	{
1291	if (GIMME_V != G_VOID)	1746	if (GIMME_V != G_VOID)
…		…
1293		1748
1294	req = SvAIO_REQ (ST (i));	1749	req = SvAIO_REQ (ST (i));
1295		1750
1296	if (req)	1751	if (req)
1297	{	1752	{
1298	++grp->length;	1753	++grp->size;
1299	req->grp = grp;	1754	req->grp = grp;
1300		1755
1301	req->grp_prev = 0;	1756	req->grp_prev = 0;
1302	req->grp_next = grp->grp_first;	1757	req->grp_next = grp->grp_first;
1303		1758
…		…
1308	}	1763	}
1309	}	1764	}
1310	}	1765	}
1311		1766
1312	void	1767	void
		1768	cancel_subs (aio_req_ornot req)
		1769	CODE:
		1770	req_cancel_subs (req);
		1771
		1772	void
1313	result (aio_req grp, ...)	1773	result (aio_req grp, ...)
1314	CODE:	1774	CODE:
1315	{	1775	{
1316	int i;	1776	int i;
		1777	AV *av;
		1778
		1779	grp->errorno = errno;
		1780
1317	AV *av = newAV ();	1781	av = newAV ();
1318		1782
1319	for (i = 1; i < items; ++i )	1783	for (i = 1; i < items; ++i )
1320	av_push (av, newSVsv (ST (i)));	1784	av_push (av, newSVsv (ST (i)));
1321		1785
1322	SvREFCNT_dec (grp->data);	1786	SvREFCNT_dec (grp->sv1);
1323	grp->data = (SV *)av;	1787	grp->sv1 = (SV *)av;
1324	}	1788	}
1325		1789
1326	void	1790	void
1327	lock (aio_req grp)	1791	errno (aio_req grp, int errorno = errno)
		1792	CODE:
		1793	grp->errorno = errorno;
		1794
		1795	void
		1796	limit (aio_req grp, int limit)
1328	CODE:	1797	CODE:
1329	++grp->length;	1798	grp->int2 = limit;
		1799	aio_grp_feed (grp);
1330		1800
1331	void	1801	void
1332	unlock (aio_req grp)	1802	feed (aio_req grp, SV *callback=&PL_sv_undef)
1333	CODE:	1803	CODE:
1334	aio_grp_dec (grp);	1804	{
		1805	SvREFCNT_dec (grp->sv2);
		1806	grp->sv2 = newSVsv (callback);
1335		1807
1336	void	1808	if (grp->int2 <= 0)
1337	feeder_limit (aio_req grp, int limit)	1809	grp->int2 = 2;
1338	CODE:	1810
1339	grp->fd2 = limit;
1340	aio_grp_feed (grp);	1811	aio_grp_feed (grp);
1341
1342	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:
1345	{
1346	SvREFCNT_dec (grp->fh2);
1347	grp->fh2 = newSVsv (callback);
1348
1349	if (grp->fd2 <= 0)
1350	grp->fd2 = 2;
1351
1352	aio_grp_feed (grp);
1353	}	1812	}
1354		1813

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