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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.62 by root, Mon Oct 23 22:45:18 2006 UTC vs.
Revision 1.91 by root, Wed Nov 8 01:57:43 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_GROUP, REQ_NOP,	104	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	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 *volatile next;	113	struct aio_cb *volatile next;
70		114
71	SV *data, *callback;	115	SV *callback, *fh;
72	SV *fh, *fh2;	116	SV *sv1, *sv2;
73	void *dataptr, *data2ptr;	117	void *ptr1, *ptr2;
74	Stat_t *statdata;
75	off_t offset;	118	off_t offs;
76	size_t length;	119	size_t size;
77	ssize_t result;	120	ssize_t result;
78		121
79	STRLEN dataoffset;	122	STRLEN stroffset;
80	int type;	123	int type;
81	int fd, fd2;	124	int int1, int2;
82	int errorno;	125	int errorno;
83	mode_t mode; /* open */	126	mode_t mode; /* open */
84		127
85	unsigned char flags;	128	unsigned char flags;
86	unsigned char pri;	129	unsigned char pri;
…		…
88	SV *self; /* the perl counterpart of this request, if any */	131	SV *self; /* the perl counterpart of this request, if any */
89	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
90	} aio_cb;	133	} aio_cb;
91		134
92	enum {	135	enum {
93	FLAG_CANCELLED = 0x01,	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) */
94	};	139	};
95		140
96	typedef aio_cb *aio_req;	141	typedef aio_cb *aio_req;
97	typedef aio_cb *aio_req_ornot;	142	typedef aio_cb *aio_req_ornot;
98		143
…		…
100	PRI_MIN = -4,	145	PRI_MIN = -4,
101	PRI_MAX = 4,	146	PRI_MAX = 4,
102		147
103	DEFAULT_PRI = 0,	148	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,	149	PRI_BIAS = -PRI_MIN,
		150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
105	};	151	};
106		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
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;	165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108		166
109	static int started, wanted;	167	static unsigned int started, idle, wanted;
110	static volatile int nreqs;	168
111	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;
112	static int respipe [2];	221	static int respipe [2];
113		222
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		226
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	227	#if WORDACCESS_UNSAFE
119	static volatile aio_req ress, rese; /* queue start, queue end */
120		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 ();
121	static void req_invoke (aio_req req);	325	static void req_invoke (aio_req req);
122	static void req_free (aio_req req);	326	static void req_free (aio_req req);
		327	static void req_cancel (aio_req req);
123		328
124	/* must be called at most once */	329	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	330	static SV *req_sv (aio_req req, const char *klass)
126	{	331	{
127	if (!req->self)	332	if (!req->self)
…		…
145	return mg ? (aio_req)mg->mg_ptr : 0;	350	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	351	}
147		352
148	static void aio_grp_feed (aio_req grp)	353	static void aio_grp_feed (aio_req grp)
149	{	354	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
151	{	356	{
152	int old_len = grp->length;	357	int old_len = grp->size;
153		358
154	if (grp->fh2 && SvOK (grp->fh2))	359	if (grp->sv2 && SvOK (grp->sv2))
155	{	360	{
156	dSP;	361	dSP;
157		362
158	ENTER;	363	ENTER;
159	SAVETMPS;	364	SAVETMPS;
160	PUSHMARK (SP);	365	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;	367	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);	368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
164	SPAGAIN;	369	SPAGAIN;
165	FREETMPS;	370	FREETMPS;
166	LEAVE;	371	LEAVE;
167	}	372	}
168		373
169	/* stop if no progress has been made */	374	/* stop if no progress has been made */
170	if (old_len == grp->length)	375	if (old_len == grp->size)
171	{	376	{
172	SvREFCNT_dec (grp->fh2);	377	SvREFCNT_dec (grp->sv2);
173	grp->fh2 = 0;	378	grp->sv2 = 0;
174	break;	379	break;
175	}	380	}
176	}	381	}
177	}	382	}
178		383
179	static void aio_grp_dec (aio_req grp)	384	static void aio_grp_dec (aio_req grp)
180	{	385	{
181	--grp->length;	386	--grp->size;
182		387
183	/* call feeder, if applicable */	388	/* call feeder, if applicable */
184	aio_grp_feed (grp);	389	aio_grp_feed (grp);
185		390
186	/* finish, if done */	391	/* finish, if done */
187	if (!grp->length && grp->fd)	392	if (!grp->size && grp->int1)
188	{	393	{
189	req_invoke (grp);	394	req_invoke (grp);
190	req_free (grp);	395	req_free (grp);
191	}	396	}
192	}	397	}
193		398
194	static void poll_wait ()	399	static void req_invoke (aio_req req)
195	{	400	{
196	fd_set rfd;	401	dSP;
197		402
198	while (nreqs)	403	if (req->flags & FLAG_SV1_RO_OFF)
		404	SvREADONLY_off (req->sv1);
		405
		406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
199	{	407	{
200	aio_req req;	408	ENTER;
201	pthread_mutex_lock (&reslock);	409	SAVETMPS;
202	req = ress;	410	PUSHMARK (SP);
203	pthread_mutex_unlock (&reslock);	411	EXTEND (SP, 1);
204		412
205	if (req)	413	switch (req->type)
206	return;	414	{
		415	case REQ_READDIR:
		416	{
		417	SV *rv = &PL_sv_undef;
207		418
208	FD_ZERO(&rfd);	419	if (req->result >= 0)
209	FD_SET(respipe [0], &rfd);	420	{
		421	int i;
		422	char *buf = req->ptr2;
		423	AV *av = newAV ();
210		424
211	select (respipe [0] + 1, &rfd, 0, 0, 0);	425	av_extend (av, req->result - 1);
		426
		427	for (i = 0; i < req->result; ++i)
		428	{
		429	SV *sv = newSVpv (buf, 0);
		430
		431	av_store (av, i, sv);
		432	buf += SvCUR (sv) + 1;
		433	}
		434
		435	rv = sv_2mortal (newRV_noinc ((SV *)av));
		436	}
		437
		438	PUSHs (rv);
		439	}
		440	break;
		441
		442	case REQ_OPEN:
		443	{
		444	/* convert fd to fh */
		445	SV *fh;
		446
		447	PUSHs (sv_2mortal (newSViv (req->result)));
		448	PUTBACK;
		449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		450	SPAGAIN;
		451
		452	fh = SvREFCNT_inc (POPs);
		453
		454	PUSHMARK (SP);
		455	XPUSHs (sv_2mortal (fh));
		456	}
		457	break;
		458
		459	case REQ_GROUP:
		460	req->int1 = 2; /* mark group as finished */
		461
		462	if (req->sv1)
		463	{
		464	int i;
		465	AV *av = (AV *)req->sv1;
		466
		467	EXTEND (SP, AvFILL (av) + 1);
		468	for (i = 0; i <= AvFILL (av); ++i)
		469	PUSHs (*av_fetch (av, i, 0));
		470	}
		471	break;
		472
		473	case REQ_NOP:
		474	case REQ_BUSY:
		475	break;
		476
		477	case REQ_READLINK:
		478	if (req->result > 0)
		479	{
		480	SvCUR_set (req->sv1, req->result);
		481	*SvEND (req->sv1) = 0;
		482	PUSHs (req->sv1);
		483	}
		484	break;
		485
		486	case REQ_STAT:
		487	case REQ_LSTAT:
		488	case REQ_FSTAT:
		489	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		490	PL_laststatval = req->result;
		491	PL_statcache = *(Stat_t *)(req->ptr2);
		492	PUSHs (sv_2mortal (newSViv (req->result)));
		493	break;
		494
		495	case REQ_READ:
		496	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		497	*SvEND (req->sv1) = 0;
		498	PUSHs (sv_2mortal (newSViv (req->result)));
		499	break;
		500
		501	default:
		502	PUSHs (sv_2mortal (newSViv (req->result)));
		503	break;
		504	}
		505
		506	errno = req->errorno;
		507
		508	PUTBACK;
		509	call_sv (req->callback, G_VOID | G_EVAL);
		510	SPAGAIN;
		511
		512	FREETMPS;
		513	LEAVE;
212	}	514	}
213	}
214		515
215	static void req_invoke (aio_req req)	516	if (req->grp)
216	{
217	dSP;
218	int errorno = errno;
219
220	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
221	return;
222
223	errno = req->errorno;
224
225	ENTER;
226	SAVETMPS;
227	PUSHMARK (SP);
228	EXTEND (SP, 1);
229
230	switch (req->type)
231	{	517	{
232	case REQ_READDIR:	518	aio_req grp = req->grp;
233	{
234	SV *rv = &PL_sv_undef;
235		519
236	if (req->result >= 0)	520	/* unlink request */
237	{	521	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
238	char *buf = req->data2ptr;	522	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
239	AV *av = newAV ();
240		523
241	while (req->result)	524	if (grp->grp_first == req)
242	{	525	grp->grp_first = req->grp_next;
243	SV *sv = newSVpv (buf, 0);
244		526
245	av_push (av, sv);	527	aio_grp_dec (grp);
246	buf += SvCUR (sv) + 1;
247	req->result--;
248	}
249
250	rv = sv_2mortal (newRV_noinc ((SV *)av));
251	}
252
253	PUSHs (rv);
254	}
255	break;
256
257	case REQ_OPEN:
258	{
259	/* convert fd to fh */
260	SV *fh;
261
262	PUSHs (sv_2mortal (newSViv (req->result)));
263	PUTBACK;
264	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
265	SPAGAIN;
266
267	fh = SvREFCNT_inc (POPs);
268
269	PUSHMARK (SP);
270	XPUSHs (sv_2mortal (fh));
271	}
272	break;
273
274	case REQ_GROUP:
275	req->fd = 2; /* mark group as finished */
276
277	if (req->data)
278	{
279	int i;
280	AV *av = (AV *)req->data;
281
282	EXTEND (SP, AvFILL (av) + 1);
283	for (i = 0; i <= AvFILL (av); ++i)
284	PUSHs (*av_fetch (av, i, 0));
285	}
286	break;
287
288	case REQ_NOP:
289	case REQ_SLEEP:
290	break;
291
292	default:
293	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;
295	}	528	}
296
297
298	PUTBACK;
299	call_sv (req->callback, G_VOID | G_EVAL);
300	SPAGAIN;
301
302	FREETMPS;
303	LEAVE;
304
305	errno = errorno;
306		529
307	if (SvTRUE (ERRSV))	530	if (SvTRUE (ERRSV))
308	{	531	{
309	req_free (req);	532	req_free (req);
310	croak (0);	533	croak (0);
311	}	534	}
312	}	535	}
313		536
314	static void req_free (aio_req req)	537	static void req_free (aio_req req)
315	{	538	{
316	if (req->grp)
317	{
318	aio_req grp = req->grp;
319
320	/* unlink request */
321	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
322	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
323
324	if (grp->grp_first == req)
325	grp->grp_first = req->grp_next;
326
327	aio_grp_dec (grp);
328	}
329
330	if (req->self)	539	if (req->self)
331	{	540	{
332	sv_unmagic (req->self, PERL_MAGIC_ext);	541	sv_unmagic (req->self, PERL_MAGIC_ext);
333	SvREFCNT_dec (req->self);	542	SvREFCNT_dec (req->self);
334	}	543	}
335		544
336	SvREFCNT_dec (req->data);
337	SvREFCNT_dec (req->fh);	545	SvREFCNT_dec (req->fh);
		546	SvREFCNT_dec (req->sv1);
338	SvREFCNT_dec (req->fh2);	547	SvREFCNT_dec (req->sv2);
339	SvREFCNT_dec (req->callback);	548	SvREFCNT_dec (req->callback);
340	Safefree (req->statdata);
341		549
342	if (req->type == REQ_READDIR && req->result >= 0)	550	if (req->flags & FLAG_PTR2_FREE)
343	free (req->data2ptr);	551	free (req->ptr2);
344		552
345	Safefree (req);	553	Safefree (req);
346	}	554	}
347		555
		556	static void req_cancel_subs (aio_req grp)
		557	{
		558	aio_req sub;
		559
		560	if (grp->type != REQ_GROUP)
		561	return;
		562
		563	SvREFCNT_dec (grp->sv2);
		564	grp->sv2 = 0;
		565
		566	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		567	req_cancel (sub);
		568	}
		569
348	static void req_cancel (aio_req req)	570	static void req_cancel (aio_req req)
349	{	571	{
350	req->flags |= FLAG_CANCELLED;	572	req->flags |= FLAG_CANCELLED;
351		573
352	if (req->type == REQ_GROUP)	574	req_cancel_subs (req);
353	{
354	aio_req sub;
355
356	for (sub = req->grp_first; sub; sub = sub->grp_next)
357	req_cancel (sub);
358	}
359	}
360
361	static int poll_cb ()
362	{
363	dSP;
364	int count = 0;
365	int do_croak = 0;
366	aio_req req;
367
368	for (;;)
369	{
370	pthread_mutex_lock (&reslock);
371	req = ress;
372
373	if (req)
374	{
375	ress = req->next;
376
377	if (!ress)
378	{
379	/* read any signals sent by the worker threads */
380	char buf [32];
381	while (read (respipe [0], buf, 32) == 32)
382	;
383
384	rese = 0;
385	}
386	}
387
388	pthread_mutex_unlock (&reslock);
389
390	if (!req)
391	break;
392
393	--nreqs;
394
395	if (req->type == REQ_QUIT)
396	started--;
397	else if (req->type == REQ_GROUP && req->length)
398	{
399	req->fd = 1; /* mark request as delayed */
400	continue;
401	}
402	else
403	{
404	if (req->type == REQ_READ)
405	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
406
407	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
408	SvREADONLY_off (req->data);
409
410	if (req->statdata)
411	{
412	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
413	PL_laststatval = req->result;
414	PL_statcache = *(req->statdata);
415	}
416
417	req_invoke (req);
418
419	count++;
420	}
421
422	req_free (req);
423	}
424
425	return count;
426	}	575	}
427		576
428	static void *aio_proc(void *arg);	577	static void *aio_proc(void *arg);
429		578
430	static void start_thread (void)	579	static void start_thread (void)
431	{	580	{
432	sigset_t fullsigset, oldsigset;	581	sigset_t fullsigset, oldsigset;
433	pthread_t tid;
434	pthread_attr_t attr;	582	pthread_attr_t attr;
		583
		584	worker *wrk = calloc (1, sizeof (worker));
		585
		586	if (!wrk)
		587	croak ("unable to allocate worker thread data");
435		588
436	pthread_attr_init (&attr);	589	pthread_attr_init (&attr);
437	pthread_attr_setstacksize (&attr, STACKSIZE);	590	pthread_attr_setstacksize (&attr, STACKSIZE);
438	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	591	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		592	#ifdef PTHREAD_SCOPE_PROCESS
		593	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		594	#endif
439		595
440	sigfillset (&fullsigset);	596	sigfillset (&fullsigset);
		597
		598	LOCK (wrklock);
441	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
442		600
443	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
444	started++;
445
446	sigprocmask (SIG_SETMASK, &oldsigset, 0);
447	}
448
449	static void req_send (aio_req req)
450	{
451	while (started < wanted && nreqs >= started)
452	start_thread ();
453
454	++nreqs;
455
456	pthread_mutex_lock (&reqlock);
457
458	req->next = 0;
459
460	if (reqe)
461	{	602	{
462	reqe->next = req;	603	wrk->prev = &wrk_first;
463	reqe = req;	604	wrk->next = wrk_first.next;
		605	wrk_first.next->prev = wrk;
		606	wrk_first.next = wrk;
		607	++started;
464	}	608	}
465	else	609	else
466	reqe = reqs = req;	610	free (wrk);
467		611
		612	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		613	UNLOCK (wrklock);
		614	}
		615
		616	static void maybe_start_thread ()
		617	{
		618	if (get_nthreads () >= wanted)
		619	return;
		620
		621	/* todo: maybe use idle here, but might be less exact */
		622	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		623	return;
		624
		625	start_thread ();
		626	}
		627
		628	static void req_send (aio_req req)
		629	{
		630	++nreqs;
		631
		632	LOCK (reqlock);
		633	++nready;
		634	reqq_push (&req_queue, req);
468	pthread_cond_signal (&reqwait);	635	pthread_cond_signal (&reqwait);
469	pthread_mutex_unlock (&reqlock);	636	UNLOCK (reqlock);
470		637
471	if (nreqs > max_outstanding)	638	maybe_start_thread ();
472	for (;;)
473	{
474	poll_cb ();
475
476	if (nreqs <= max_outstanding)
477	break;
478
479	poll_wait ();
480	}
481	}	639	}
482		640
483	static void end_thread (void)	641	static void end_thread (void)
484	{	642	{
485	aio_req req;	643	aio_req req;
		644
486	Newz (0, req, 1, aio_cb);	645	Newz (0, req, 1, aio_cb);
		646
487	req->type = REQ_QUIT;	647	req->type = REQ_QUIT;
		648	req->pri = PRI_MAX + PRI_BIAS;
488		649
489	req_send (req);	650	LOCK (reqlock);
		651	reqq_push (&req_queue, req);
		652	pthread_cond_signal (&reqwait);
		653	UNLOCK (reqlock);
		654
		655	LOCK (wrklock);
		656	--started;
		657	UNLOCK (wrklock);
		658	}
		659
		660	static void set_max_idle (int nthreads)
		661	{
		662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		663	max_idle = nthreads <= 0 ? 1 : nthreads;
		664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
490	}	665	}
491		666
492	static void min_parallel (int nthreads)	667	static void min_parallel (int nthreads)
493	{	668	{
494	if (wanted < nthreads)	669	if (wanted < nthreads)
495	wanted = nthreads;	670	wanted = nthreads;
496	}	671	}
497		672
498	static void max_parallel (int nthreads)	673	static void max_parallel (int nthreads)
499	{	674	{
500	int cur = started;
501
502	if (wanted > nthreads)	675	if (wanted > nthreads)
503	wanted = nthreads;	676	wanted = nthreads;
504		677
505	while (cur > wanted)	678	while (started > wanted)
		679	end_thread ();
		680	}
		681
		682	static void poll_wait ()
		683	{
		684	fd_set rfd;
		685
		686	while (nreqs)
506	{	687	{
		688	int size;
		689	if (WORDACCESS_UNSAFE) LOCK (reslock);
		690	size = res_queue.size;
		691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		692
		693	if (size)
		694	return;
		695
507	end_thread ();	696	maybe_start_thread ();
508	cur--;	697
		698	FD_ZERO(&rfd);
		699	FD_SET(respipe [0], &rfd);
		700
		701	select (respipe [0] + 1, &rfd, 0, 0, 0);
509	}	702	}
		703	}
510		704
511	while (started > wanted)	705	static int poll_cb ()
		706	{
		707	dSP;
		708	int count = 0;
		709	int maxreqs = max_poll_reqs;
		710	int do_croak = 0;
		711	struct timeval tv_start, tv_now;
		712	aio_req req;
		713
		714	if (max_poll_time)
		715	gettimeofday (&tv_start, 0);
		716
		717	for (;;)
512	{	718	{
		719	for (;;)
		720	{
		721	maybe_start_thread ();
		722
		723	LOCK (reslock);
		724	req = reqq_shift (&res_queue);
		725
		726	if (req)
		727	{
		728	--npending;
		729
		730	if (!res_queue.size)
		731	{
		732	/* read any signals sent by the worker threads */
		733	char buf [32];
		734	while (read (respipe [0], buf, 32) == 32)
		735	;
		736	}
		737	}
		738
		739	UNLOCK (reslock);
		740
		741	if (!req)
		742	break;
		743
		744	--nreqs;
		745
		746	if (req->type == REQ_GROUP && req->size)
		747	{
		748	req->int1 = 1; /* mark request as delayed */
		749	continue;
		750	}
		751	else
		752	{
		753	req_invoke (req);
		754
		755	count++;
		756	}
		757
		758	req_free (req);
		759
		760	if (maxreqs && !--maxreqs)
		761	break;
		762
		763	if (max_poll_time)
		764	{
		765	gettimeofday (&tv_now, 0);
		766
		767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		768	break;
		769	}
		770	}
		771
		772	if (nreqs <= max_outstanding)
		773	break;
		774
513	poll_wait ();	775	poll_wait ();
514	poll_cb ();	776
		777	++maxreqs;
515	}	778	}
		779
		780	return count;
516	}	781	}
517		782
518	static void create_pipe ()	783	static void create_pipe ()
519	{	784	{
520	if (pipe (respipe))	785	if (pipe (respipe))
…		…
544	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	809	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
545	{	810	{
546	ssize_t res;	811	ssize_t res;
547	off_t ooffset;	812	off_t ooffset;
548		813
549	pthread_mutex_lock (&preadwritelock);	814	LOCK (preadwritelock);
550	ooffset = lseek (fd, 0, SEEK_CUR);	815	ooffset = lseek (fd, 0, SEEK_CUR);
551	lseek (fd, offset, SEEK_SET);	816	lseek (fd, offset, SEEK_SET);
552	res = read (fd, buf, count);	817	res = read (fd, buf, count);
553	lseek (fd, ooffset, SEEK_SET);	818	lseek (fd, ooffset, SEEK_SET);
554	pthread_mutex_unlock (&preadwritelock);	819	UNLOCK (preadwritelock);
555		820
556	return res;	821	return res;
557	}	822	}
558		823
559	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	824	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
560	{	825	{
561	ssize_t res;	826	ssize_t res;
562	off_t ooffset;	827	off_t ooffset;
563		828
564	pthread_mutex_lock (&preadwritelock);	829	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	830	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	831	lseek (fd, offset, SEEK_SET);
567	res = write (fd, buf, count);	832	res = write (fd, buf, count);
568	lseek (fd, offset, SEEK_SET);	833	lseek (fd, offset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	834	UNLOCK (preadwritelock);
570		835
571	return res;	836	return res;
572	}	837	}
573	#endif	838	#endif
574		839
575	#if !HAVE_FDATASYNC	840	#if !HAVE_FDATASYNC
576	# define fdatasync fsync	841	# define fdatasync fsync
577	#endif	842	#endif
578		843
579	#if !HAVE_READAHEAD	844	#if !HAVE_READAHEAD
580	# define readahead aio_readahead	845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
581		846
582	static ssize_t readahead (int fd, off_t offset, size_t count)	847	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
583	{	848	{
584	char readahead_buf[4096];	849	dBUF;
585		850
586	while (count > 0)	851	while (count > 0)
587	{	852	{
588	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
589		854
590	pread (fd, readahead_buf, len, offset);	855	pread (fd, aio_buf, len, offset);
591	offset += len;	856	offset += len;
592	count -= len;	857	count -= len;
593	}	858	}
594		859
595	errno = 0;	860	errno = 0;
596	}	861	}
		862
597	#endif	863	#endif
598		864
599	#if !HAVE_READDIR_R	865	#if !HAVE_READDIR_R
600	# define readdir_r aio_readdir_r	866	# define readdir_r aio_readdir_r
601		867
…		…
604	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	870	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
605	{	871	{
606	struct dirent *e;	872	struct dirent *e;
607	int errorno;	873	int errorno;
608		874
609	pthread_mutex_lock (&readdirlock);	875	LOCK (readdirlock);
610		876
611	e = readdir (dirp);	877	e = readdir (dirp);
612	errorno = errno;	878	errorno = errno;
613		879
614	if (e)	880	if (e)
…		…
617	strcpy (ent->d_name, e->d_name);	883	strcpy (ent->d_name, e->d_name);
618	}	884	}
619	else	885	else
620	*res = 0;	886	*res = 0;
621		887
622	pthread_mutex_unlock (&readdirlock);	888	UNLOCK (readdirlock);
623		889
624	errno = errorno;	890	errno = errorno;
625	return e ? 0 : -1;	891	return e ? 0 : -1;
626	}	892	}
627	#endif	893	#endif
628		894
629	/* sendfile always needs emulation */	895	/* sendfile always needs emulation */
630	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	896	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
631	{	897	{
632	ssize_t res;	898	ssize_t res;
633		899
634	if (!count)	900	if (!count)
635	return 0;	901	return 0;
…		…
646	{	912	{
647	off_t sbytes;	913	off_t sbytes;
648	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	914	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
649		915
650	if (res < 0 && sbytes)	916	if (res < 0 && sbytes)
651	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	917	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
652	res = sbytes;	918	res = sbytes;
653	}	919	}
654		920
655	# elif __hpux	921	# elif __hpux
656	res = sendfile (ofd, ifd, offset, count, 0, 0);	922	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
684	#endif	950	#endif
685	)	951	)
686	)	952	)
687	{	953	{
688	/* emulate sendfile. this is a major pain in the ass */	954	/* emulate sendfile. this is a major pain in the ass */
689	char buf[4096];	955	dBUF;
		956
690	res = 0;	957	res = 0;
691		958
692	while (count)	959	while (count)
693	{	960	{
694	ssize_t cnt;	961	ssize_t cnt;
695		962
696	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	963	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
697		964
698	if (cnt <= 0)	965	if (cnt <= 0)
699	{	966	{
700	if (cnt && !res) res = -1;	967	if (cnt && !res) res = -1;
701	break;	968	break;
702	}	969	}
703		970
704	cnt = write (ofd, buf, cnt);	971	cnt = write (ofd, aio_buf, cnt);
705		972
706	if (cnt <= 0)	973	if (cnt <= 0)
707	{	974	{
708	if (cnt && !res) res = -1;	975	if (cnt && !res) res = -1;
709	break;	976	break;
…		…
717		984
718	return res;	985	return res;
719	}	986	}
720		987
721	/* read a full directory */	988	/* read a full directory */
722	static int scandir_ (const char *path, void **namesp)	989	static void scandir_ (aio_req req, worker *self)
723	{	990	{
724	DIR *dirp = opendir (path);	991	DIR *dirp;
725	union	992	union
726	{	993	{
727	struct dirent d;	994	struct dirent d;
728	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
729	} u;	996	} *u;
730	struct dirent *entp;	997	struct dirent *entp;
731	char *name, *names;	998	char *name, *names;
732	int memlen = 4096;	999	int memlen = 4096;
733	int memofs = 0;	1000	int memofs = 0;
734	int res = 0;	1001	int res = 0;
735	int errorno;	1002	int errorno;
736		1003
737	if (!dirp)	1004	LOCK (wrklock);
738	return -1;	1005	self->dirp = dirp = opendir (req->ptr1);
739		1006	self->dbuf = u = malloc (sizeof (*u));
		1007	req->flags |= FLAG_PTR2_FREE;
740	names = malloc (memlen);	1008	req->ptr2 = names = malloc (memlen);
		1009	UNLOCK (wrklock);
		1010
		1011	if (dirp && u && names)
		1012	for (;;)
		1013	{
		1014	errno = 0;
		1015	readdir_r (dirp, &u->d, &entp);
		1016
		1017	if (!entp)
		1018	break;
		1019
		1020	name = entp->d_name;
		1021
		1022	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1023	{
		1024	int len = strlen (name) + 1;
		1025
		1026	res++;
		1027
		1028	while (memofs + len > memlen)
		1029	{
		1030	memlen *= 2;
		1031	LOCK (wrklock);
		1032	req->ptr2 = names = realloc (names, memlen);
		1033	UNLOCK (wrklock);
		1034
		1035	if (!names)
		1036	break;
		1037	}
		1038
		1039	memcpy (names + memofs, name, len);
		1040	memofs += len;
		1041	}
		1042	}
		1043
		1044	if (errno)
		1045	res = -1;
		1046
		1047	req->result = res;
		1048	}
		1049
		1050	/*****************************************************************************/
		1051
		1052	static void *aio_proc (void *thr_arg)
		1053	{
		1054	aio_req req;
		1055	struct timespec ts;
		1056	worker *self = (worker *)thr_arg;
		1057
		1058	/* try to distribute timeouts somewhat evenly */
		1059	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1060	* (1000000000UL / 1024UL);
741		1061
742	for (;;)	1062	for (;;)
743	{	1063	{
744	errno = 0, readdir_r (dirp, &u.d, &entp);	1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;
745		1065
746	if (!entp)	1066	LOCK (reqlock);
747	break;
748
749	name = entp->d_name;
750
751	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
752	{
753	int len = strlen (name) + 1;
754
755	res++;
756
757	while (memofs + len > memlen)
758	{
759	memlen *= 2;
760	names = realloc (names, memlen);
761	if (!names)
762	break;
763	}
764
765	memcpy (names + memofs, name, len);
766	memofs += len;
767	}
768	}
769
770	errorno = errno;
771	closedir (dirp);
772
773	if (errorno)
774	{
775	free (names);
776	errno = errorno;
777	res = -1;
778	}
779
780	*namesp = (void *)names;
781	return res;
782	}
783
784	/*****************************************************************************/
785
786	static void *aio_proc (void *thr_arg)
787	{
788	aio_req req;
789	int type;
790
791	do
792	{
793	pthread_mutex_lock (&reqlock);
794		1067
795	for (;;)	1068	for (;;)
796	{	1069	{
797	req = reqs;	1070	self->req = req = reqq_shift (&req_queue);
798
799	if (reqs)
800	{
801	reqs = reqs->next;
802	if (!reqs) reqe = 0;
803	}
804		1071
805	if (req)	1072	if (req)
806	break;	1073	break;
807		1074
		1075	++idle;
		1076
		1077	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1078	== ETIMEDOUT)
		1079	{
		1080	if (idle > max_idle)
		1081	{
		1082	--idle;
		1083	UNLOCK (reqlock);
		1084	LOCK (wrklock);
		1085	--started;
		1086	UNLOCK (wrklock);
		1087	goto quit;
		1088	}
		1089
		1090	/* we are allowed to idle, so do so without any timeout */
808	pthread_cond_wait (&reqwait, &reqlock);	1091	pthread_cond_wait (&reqwait, &reqlock);
		1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1093	}
		1094
		1095	--idle;
809	}	1096	}
810		1097
811	pthread_mutex_unlock (&reqlock);	1098	--nready;
		1099
		1100	UNLOCK (reqlock);
812		1101
813	errno = 0; /* strictly unnecessary */	1102	errno = 0; /* strictly unnecessary */
814	type = req->type; /* remember type for QUIT check */
815		1103
816	if (!(req->flags & FLAG_CANCELLED))	1104	if (!(req->flags & FLAG_CANCELLED))
817	switch (type)	1105	switch (req->type)
818	{	1106	{
819	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1107	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
820	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1108	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
821		1109
822	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1110	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
823	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1111	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
824		1112
825	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1113	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
826	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1114	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
827	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1115	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
828		1116
829	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1117	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
830	case REQ_CLOSE: req->result = close (req->fd); break;	1118	case REQ_CLOSE: req->result = close (req->int1); break;
831	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
832	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
833	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
834	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
835	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1123	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1124	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1125	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
836		1126
837	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
838	case REQ_FSYNC: req->result = fsync (req->fd); break;	1128	case REQ_FSYNC: req->result = fsync (req->int1); break;
839	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1129	case REQ_READDIR: scandir_ (req, self); break;
840		1130
841	case REQ_SLEEP:	1131	case REQ_BUSY:
842	{	1132	{
843	struct timeval tv;	1133	struct timeval tv;
844		1134
845	tv.tv_sec = req->fd;	1135	tv.tv_sec = req->int1;
846	tv.tv_usec = req->fd2;	1136	tv.tv_usec = req->int2;
847		1137
848	req->result = select (0, 0, 0, 0, &tv);	1138	req->result = select (0, 0, 0, 0, &tv);
849	}	1139	}
850		1140
851	case REQ_GROUP:	1141	case REQ_GROUP:
852	case REQ_NOP:	1142	case REQ_NOP:
		1143	break;
		1144
853	case REQ_QUIT:	1145	case REQ_QUIT:
854	break;	1146	goto quit;
855		1147
856	default:	1148	default:
857	req->result = ENOSYS;	1149	req->result = ENOSYS;
858	break;	1150	break;
859	}	1151	}
860		1152
861	req->errorno = errno;	1153	req->errorno = errno;
862		1154
863	pthread_mutex_lock (&reslock);	1155	LOCK (reslock);
864		1156
865	req->next = 0;	1157	++npending;
866		1158
867	if (rese)	1159	if (!reqq_push (&res_queue, req))
868	{
869	rese->next = req;
870	rese = req;
871	}
872	else
873	{
874	rese = ress = req;
875
876	/* write a dummy byte to the pipe so fh becomes ready */	1160	/* write a dummy byte to the pipe so fh becomes ready */
877	write (respipe [1], &respipe, 1);	1161	write (respipe [1], &respipe, 1);
878	}
879		1162
880	pthread_mutex_unlock (&reslock);	1163	self->req = 0;
		1164	worker_clear (self);
		1165
		1166	UNLOCK (reslock);
881	}	1167	}
882	while (type != REQ_QUIT);	1168
		1169	quit:
		1170	LOCK (wrklock);
		1171	worker_free (self);
		1172	UNLOCK (wrklock);
883		1173
884	return 0;	1174	return 0;
885	}	1175	}
886		1176
887	/*****************************************************************************/	1177	/*****************************************************************************/
888		1178
889	static void atfork_prepare (void)	1179	static void atfork_prepare (void)
890	{	1180	{
891	pthread_mutex_lock (&reqlock);	1181	LOCK (wrklock);
892	pthread_mutex_lock (&reslock);	1182	LOCK (reqlock);
		1183	LOCK (reslock);
893	#if !HAVE_PREADWRITE	1184	#if !HAVE_PREADWRITE
894	pthread_mutex_lock (&preadwritelock);	1185	LOCK (preadwritelock);
895	#endif	1186	#endif
896	#if !HAVE_READDIR_R	1187	#if !HAVE_READDIR_R
897	pthread_mutex_lock (&readdirlock);	1188	LOCK (readdirlock);
898	#endif	1189	#endif
899	}	1190	}
900		1191
901	static void atfork_parent (void)	1192	static void atfork_parent (void)
902	{	1193	{
903	#if !HAVE_READDIR_R	1194	#if !HAVE_READDIR_R
904	pthread_mutex_unlock (&readdirlock);	1195	UNLOCK (readdirlock);
905	#endif	1196	#endif
906	#if !HAVE_PREADWRITE	1197	#if !HAVE_PREADWRITE
907	pthread_mutex_unlock (&preadwritelock);	1198	UNLOCK (preadwritelock);
908	#endif	1199	#endif
909	pthread_mutex_unlock (&reslock);	1200	UNLOCK (reslock);
910	pthread_mutex_unlock (&reqlock);	1201	UNLOCK (reqlock);
		1202	UNLOCK (wrklock);
911	}	1203	}
912		1204
913	static void atfork_child (void)	1205	static void atfork_child (void)
914	{	1206	{
915	aio_req prv;	1207	aio_req prv;
916		1208
917	started = 0;	1209	while (prv = reqq_shift (&req_queue))
		1210	req_free (prv);
918		1211
919	while (reqs)	1212	while (prv = reqq_shift (&res_queue))
		1213	req_free (prv);
		1214
		1215	while (wrk_first.next != &wrk_first)
920	{	1216	{
921	prv = reqs;	1217	worker *wrk = wrk_first.next;
922	reqs = prv->next;	1218
		1219	if (wrk->req)
		1220	req_free (wrk->req);
		1221
		1222	worker_clear (wrk);
923	req_free (prv);	1223	worker_free (wrk);
924	}	1224	}
925		1225
926	reqs = reqe = 0;	1226	started = 0;
927		1227	idle = 0;
928	while (ress)	1228	nreqs = 0;
929	{	1229	nready = 0;
930	prv = ress;	1230	npending = 0;
931	ress = prv->next;
932	req_free (prv);
933	}
934
935	ress = rese = 0;
936		1231
937	close (respipe [0]);	1232	close (respipe [0]);
938	close (respipe [1]);	1233	close (respipe [1]);
939	create_pipe ();	1234	create_pipe ();
940		1235
…		…
967	PROTOTYPES: ENABLE	1262	PROTOTYPES: ENABLE
968		1263
969	BOOT:	1264	BOOT:
970	{	1265	{
971	HV *stash = gv_stashpv ("IO::AIO", 1);	1266	HV *stash = gv_stashpv ("IO::AIO", 1);
		1267
972	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
973	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
974	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1270	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1271	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1272	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1273	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
975		1274
976	create_pipe ();	1275	create_pipe ();
977	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
978	}	1277	}
979		1278
980	void	1279	void
981	min_parallel (nthreads)	1280	max_poll_reqs (int nreqs)
982	int nthreads
983	PROTOTYPE: $	1281	PROTOTYPE: $
		1282	CODE:
		1283	max_poll_reqs = nreqs;
984		1284
985	void	1285	void
986	max_parallel (nthreads)	1286	max_poll_time (double nseconds)
987	int nthreads
988	PROTOTYPE: $	1287	PROTOTYPE: $
		1288	CODE:
		1289	max_poll_time = nseconds * AIO_TICKS;
		1290
		1291	void
		1292	min_parallel (int nthreads)
		1293	PROTOTYPE: $
		1294
		1295	void
		1296	max_parallel (int nthreads)
		1297	PROTOTYPE: $
		1298
		1299	void
		1300	max_idle (int nthreads)
		1301	PROTOTYPE: $
		1302	CODE:
		1303	set_max_idle (nthreads);
989		1304
990	int	1305	int
991	max_outstanding (nreqs)	1306	max_outstanding (int maxreqs)
992	int nreqs	1307	PROTOTYPE: $
993	PROTOTYPE: $
994	CODE:	1308	CODE:
995	RETVAL = max_outstanding;	1309	RETVAL = max_outstanding;
996	max_outstanding = nreqs;	1310	max_outstanding = maxreqs;
		1311	OUTPUT:
		1312	RETVAL
997		1313
998	void	1314	void
999	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1000	SV * pathname	1316	SV8 * pathname
1001	int flags	1317	int flags
1002	int mode	1318	int mode
1003	SV * callback	1319	SV * callback
1004	PROTOTYPE: $$$;$	1320	PROTOTYPE: $$$;$
1005	PPCODE:	1321	PPCODE:
1006	{	1322	{
1007	dREQ;	1323	dREQ;
1008		1324
1009	req->type = REQ_OPEN;	1325	req->type = REQ_OPEN;
1010	req->data = newSVsv (pathname);	1326	req->sv1 = newSVsv (pathname);
1011	req->dataptr = SvPVbyte_nolen (req->data);	1327	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->fd = flags;	1328	req->int1 = flags;
1013	req->mode = mode;	1329	req->mode = mode;
1014		1330
1015	REQ_SEND;	1331	REQ_SEND;
1016	}	1332	}
1017		1333
…		…
1027	PPCODE:	1343	PPCODE:
1028	{	1344	{
1029	dREQ;	1345	dREQ;
1030		1346
1031	req->type = ix;	1347	req->type = ix;
1032	req->fh = newSVsv (fh);	1348	req->fh = newSVsv (fh);
1033	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1034		1350
1035	REQ_SEND (req);	1351	REQ_SEND (req);
1036	}	1352	}
1037		1353
1038	void	1354	void
1039	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1040	SV * fh	1356	SV * fh
1041	UV offset	1357	UV offset
1042	UV length	1358	UV length
1043	SV * data	1359	SV8 * data
1044	UV dataoffset	1360	UV dataoffset
1045	SV * callback	1361	SV * callback
1046	ALIAS:	1362	ALIAS:
1047	aio_read = REQ_READ	1363	aio_read = REQ_READ
1048	aio_write = REQ_WRITE	1364	aio_write = REQ_WRITE
1049	PROTOTYPE: $$$$$;$	1365	PROTOTYPE: $$$$$;$
1050	PPCODE:	1366	PPCODE:
1051	{	1367	{
1052	aio_req req;
1053	STRLEN svlen;	1368	STRLEN svlen;
1054	char *svptr = SvPVbyte (data, svlen);	1369	char *svptr = SvPVbyte (data, svlen);
1055		1370
1056	SvUPGRADE (data, SVt_PV);	1371	SvUPGRADE (data, SVt_PV);
1057	SvPOK_on (data);	1372	SvPOK_on (data);
…		…
1079		1394
1080	{	1395	{
1081	dREQ;	1396	dREQ;
1082		1397
1083	req->type = ix;	1398	req->type = ix;
1084	req->fh = newSVsv (fh);	1399	req->fh = newSVsv (fh);
1085	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1086	: IoOFP (sv_2io (fh)));	1401	: IoOFP (sv_2io (fh)));
1087	req->offset = offset;	1402	req->offs = offset;
1088	req->length = length;	1403	req->size = length;
1089	req->data = SvREFCNT_inc (data);	1404	req->sv1 = SvREFCNT_inc (data);
1090	req->dataptr = (char *)svptr + dataoffset;	1405	req->ptr1 = (char *)svptr + dataoffset;
		1406	req->stroffset = dataoffset;
1091		1407
1092	if (!SvREADONLY (data))	1408	if (!SvREADONLY (data))
1093	{	1409	{
1094	SvREADONLY_on (data);	1410	SvREADONLY_on (data);
1095	req->data2ptr = (void *)data;	1411	req->flags |= FLAG_SV1_RO_OFF;
1096	}	1412	}
1097		1413
1098	REQ_SEND;	1414	REQ_SEND;
1099	}	1415	}
		1416	}
		1417
		1418	void
		1419	aio_readlink (path,callback=&PL_sv_undef)
		1420	SV8 * path
		1421	SV * callback
		1422	PROTOTYPE: $$;$
		1423	PPCODE:
		1424	{
		1425	SV *data;
		1426	dREQ;
		1427
		1428	data = newSV (NAME_MAX);
		1429	SvPOK_on (data);
		1430
		1431	req->type = REQ_READLINK;
		1432	req->fh = newSVsv (path);
		1433	req->ptr2 = SvPVbyte_nolen (req->fh);
		1434	req->sv1 = data;
		1435	req->ptr1 = SvPVbyte_nolen (data);
		1436
		1437	REQ_SEND;
1100	}	1438	}
1101		1439
1102	void	1440	void
1103	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1441	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1104	SV * out_fh	1442	SV * out_fh
…		…
1110	PPCODE:	1448	PPCODE:
1111	{	1449	{
1112	dREQ;	1450	dREQ;
1113		1451
1114	req->type = REQ_SENDFILE;	1452	req->type = REQ_SENDFILE;
1115	req->fh = newSVsv (out_fh);	1453	req->fh = newSVsv (out_fh);
1116	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1117	req->fh2 = newSVsv (in_fh);	1455	req->sv2 = newSVsv (in_fh);
1118	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1119	req->offset = in_offset;	1457	req->offs = in_offset;
1120	req->length = length;	1458	req->size = length;
1121		1459
1122	REQ_SEND;	1460	REQ_SEND;
1123	}	1461	}
1124		1462
1125	void	1463	void
…		…
1132	PPCODE:	1470	PPCODE:
1133	{	1471	{
1134	dREQ;	1472	dREQ;
1135		1473
1136	req->type = REQ_READAHEAD;	1474	req->type = REQ_READAHEAD;
1137	req->fh = newSVsv (fh);	1475	req->fh = newSVsv (fh);
1138	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1139	req->offset = offset;	1477	req->offs = offset;
1140	req->length = length;	1478	req->size = length;
1141		1479
1142	REQ_SEND;	1480	REQ_SEND;
1143	}	1481	}
1144		1482
1145	void	1483	void
1146	aio_stat (fh_or_path,callback=&PL_sv_undef)	1484	aio_stat (fh_or_path,callback=&PL_sv_undef)
1147	SV * fh_or_path	1485	SV8 * fh_or_path
1148	SV * callback	1486	SV * callback
1149	ALIAS:	1487	ALIAS:
1150	aio_stat = REQ_STAT	1488	aio_stat = REQ_STAT
1151	aio_lstat = REQ_LSTAT	1489	aio_lstat = REQ_LSTAT
1152	PPCODE:	1490	PPCODE:
1153	{	1491	{
1154	dREQ;	1492	dREQ;
1155		1493
1156	New (0, req->statdata, 1, Stat_t);	1494	req->ptr2 = malloc (sizeof (Stat_t));
1157	if (!req->statdata)	1495	if (!req->ptr2)
1158	{	1496	{
1159	req_free (req);	1497	req_free (req);
1160	croak ("out of memory during aio_req->statdata allocation");	1498	croak ("out of memory during aio_stat statdata allocation");
1161	}	1499	}
		1500
		1501	req->flags |= FLAG_PTR2_FREE;
1162		1502
1163	if (SvPOK (fh_or_path))	1503	if (SvPOK (fh_or_path))
1164	{	1504	{
1165	req->type = ix;	1505	req->type = ix;
1166	req->data = newSVsv (fh_or_path);	1506	req->sv1 = newSVsv (fh_or_path);
1167	req->dataptr = SvPVbyte_nolen (req->data);	1507	req->ptr1 = SvPVbyte_nolen (req->sv1);
1168	}	1508	}
1169	else	1509	else
1170	{	1510	{
1171	req->type = REQ_FSTAT;	1511	req->type = REQ_FSTAT;
1172	req->fh = newSVsv (fh_or_path);	1512	req->fh = newSVsv (fh_or_path);
1173	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1174	}	1514	}
1175		1515
1176	REQ_SEND;	1516	REQ_SEND;
1177	}	1517	}
1178		1518
1179	void	1519	void
1180	aio_unlink (pathname,callback=&PL_sv_undef)	1520	aio_unlink (pathname,callback=&PL_sv_undef)
1181	SV * pathname	1521	SV8 * pathname
1182	SV * callback	1522	SV * callback
1183	ALIAS:	1523	ALIAS:
1184	aio_unlink = REQ_UNLINK	1524	aio_unlink = REQ_UNLINK
1185	aio_rmdir = REQ_RMDIR	1525	aio_rmdir = REQ_RMDIR
1186	aio_readdir = REQ_READDIR	1526	aio_readdir = REQ_READDIR
1187	PPCODE:	1527	PPCODE:
1188	{	1528	{
1189	dREQ;	1529	dREQ;
1190		1530
1191	req->type = ix;	1531	req->type = ix;
1192	req->data = newSVsv (pathname);	1532	req->sv1 = newSVsv (pathname);
1193	req->dataptr = SvPVbyte_nolen (req->data);	1533	req->ptr1 = SvPVbyte_nolen (req->sv1);
1194		1534
1195	REQ_SEND;	1535	REQ_SEND;
1196	}	1536	}
1197		1537
1198	void	1538	void
1199	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1200	SV * oldpath	1540	SV8 * oldpath
1201	SV * newpath	1541	SV8 * newpath
1202	SV * callback	1542	SV * callback
1203	ALIAS:	1543	ALIAS:
1204	aio_link = REQ_LINK	1544	aio_link = REQ_LINK
1205	aio_symlink = REQ_SYMLINK	1545	aio_symlink = REQ_SYMLINK
1206	aio_rename = REQ_RENAME	1546	aio_rename = REQ_RENAME
1207	PPCODE:	1547	PPCODE:
1208	{	1548	{
1209	dREQ;	1549	dREQ;
1210		1550
1211	req->type = ix;	1551	req->type = ix;
1212	req->fh = newSVsv (oldpath);	1552	req->fh = newSVsv (oldpath);
1213	req->data2ptr = SvPVbyte_nolen (req->fh);	1553	req->ptr2 = SvPVbyte_nolen (req->fh);
1214	req->data = newSVsv (newpath);	1554	req->sv1 = newSVsv (newpath);
1215	req->dataptr = SvPVbyte_nolen (req->data);	1555	req->ptr1 = SvPVbyte_nolen (req->sv1);
1216		1556
1217	REQ_SEND;	1557	REQ_SEND;
1218	}	1558	}
1219		1559
1220	void	1560	void
1221	aio_sleep (delay,callback=&PL_sv_undef)	1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1222	double delay	1562	SV8 * pathname
1223	SV * callback	1563	SV * callback
		1564	UV mode
		1565	UV dev
1224	PPCODE:	1566	PPCODE:
1225	{	1567	{
1226	dREQ;	1568	dREQ;
		1569
		1570	req->type = REQ_MKNOD;
		1571	req->sv1 = newSVsv (pathname);
		1572	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1573	req->mode = (mode_t)mode;
		1574	req->offs = dev;
		1575
		1576	REQ_SEND;
		1577	}
1227		1578
		1579	void
		1580	aio_busy (delay,callback=&PL_sv_undef)
		1581	double delay
		1582	SV * callback
		1583	PPCODE:
		1584	{
		1585	dREQ;
		1586
1228	req->type = REQ_SLEEP;	1587	req->type = REQ_BUSY;
1229	req->fd = delay < 0. ? 0 : delay;	1588	req->int1 = delay < 0. ? 0 : delay;
1230	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1231		1590
1232	REQ_SEND;	1591	REQ_SEND;
1233	}	1592	}
1234		1593
1235	void	1594	void
…		…
1239	PPCODE:	1598	PPCODE:
1240	{	1599	{
1241	dREQ;	1600	dREQ;
1242		1601
1243	req->type = REQ_GROUP;	1602	req->type = REQ_GROUP;
		1603
1244	req_send (req);	1604	req_send (req);
1245
1246	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1247	}	1606	}
1248		1607
1249	void	1608	void
1250	aio_nop (callback=&PL_sv_undef)	1609	aio_nop (callback=&PL_sv_undef)
1251	SV * callback	1610	SV * callback
1252	PPCODE:	1611	PPCODE:
1253	{	1612	{
1254	dREQ;	1613	dREQ;
1255		1614
1256	req->type = REQ_NOP;	1615	req->type = REQ_NOP;
1257		1616
1258	REQ_SEND;	1617	REQ_SEND;
1259	}	1618	}
1260		1619
1261	#if 0	1620	int
1262		1621	aioreq_pri (int pri = 0)
1263	void	1622	PROTOTYPE: ;$
1264	aio_pri (int pri = DEFAULT_PRI)
1265	CODE:	1623	CODE:
		1624	RETVAL = next_pri - PRI_BIAS;
		1625	if (items > 0)
		1626	{
1266	if (pri < PRI_MIN) pri = PRI_MIN;	1627	if (pri < PRI_MIN) pri = PRI_MIN;
1267	if (pri > PRI_MAX) pri = PRI_MAX;	1628	if (pri > PRI_MAX) pri = PRI_MAX;
1268	next_pri = pri + PRI_BIAS;	1629	next_pri = pri + PRI_BIAS;
		1630	}
		1631	OUTPUT:
		1632	RETVAL
1269		1633
1270	#endif	1634	void
		1635	aioreq_nice (int nice = 0)
		1636	CODE:
		1637	nice = next_pri - nice;
		1638	if (nice < PRI_MIN) nice = PRI_MIN;
		1639	if (nice > PRI_MAX) nice = PRI_MAX;
		1640	next_pri = nice + PRI_BIAS;
1271		1641
1272	void	1642	void
1273	flush ()	1643	flush ()
1274	PROTOTYPE:	1644	PROTOTYPE:
1275	CODE:	1645	CODE:
…		…
1277	{	1647	{
1278	poll_wait ();	1648	poll_wait ();
1279	poll_cb ();	1649	poll_cb ();
1280	}	1650	}
1281		1651
1282	void	1652	int
1283	poll()	1653	poll()
1284	PROTOTYPE:	1654	PROTOTYPE:
1285	CODE:	1655	CODE:
1286	if (nreqs)	1656	if (nreqs)
1287	{	1657	{
1288	poll_wait ();	1658	poll_wait ();
1289	poll_cb ();	1659	RETVAL = poll_cb ();
1290	}	1660	}
		1661	else
		1662	RETVAL = 0;
		1663	OUTPUT:
		1664	RETVAL
1291		1665
1292	int	1666	int
1293	poll_fileno()	1667	poll_fileno()
1294	PROTOTYPE:	1668	PROTOTYPE:
1295	CODE:	1669	CODE:
…		…
1318	CODE:	1692	CODE:
1319	RETVAL = nreqs;	1693	RETVAL = nreqs;
1320	OUTPUT:	1694	OUTPUT:
1321	RETVAL	1695	RETVAL
1322		1696
		1697	int
		1698	nready()
		1699	PROTOTYPE:
		1700	CODE:
		1701	RETVAL = get_nready ();
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
		1706	npending()
		1707	PROTOTYPE:
		1708	CODE:
		1709	RETVAL = get_npending ();
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	int
		1714	nthreads()
		1715	PROTOTYPE:
		1716	CODE:
		1717	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1718	RETVAL = started;
		1719	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1720	OUTPUT:
		1721	RETVAL
		1722
1323	PROTOTYPES: DISABLE	1723	PROTOTYPES: DISABLE
1324		1724
1325	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1725	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1326		1726
1327	void	1727	void
1328	cancel (aio_req_ornot req)	1728	cancel (aio_req_ornot req)
1329	PROTOTYPE:
1330	CODE:	1729	CODE:
1331	req_cancel (req);	1730	req_cancel (req);
1332		1731
1333	void	1732	void
1334	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1733	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1343	PPCODE:	1742	PPCODE:
1344	{	1743	{
1345	int i;	1744	int i;
1346	aio_req req;	1745	aio_req req;
1347		1746
1348	if (grp->fd == 2)	1747	if (grp->int1 == 2)
1349	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1748	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1350		1749
1351	for (i = 1; i < items; ++i )	1750	for (i = 1; i < items; ++i )
1352	{	1751	{
1353	if (GIMME_V != G_VOID)	1752	if (GIMME_V != G_VOID)
…		…
1355		1754
1356	req = SvAIO_REQ (ST (i));	1755	req = SvAIO_REQ (ST (i));
1357		1756
1358	if (req)	1757	if (req)
1359	{	1758	{
1360	++grp->length;	1759	++grp->size;
1361	req->grp = grp;	1760	req->grp = grp;
1362		1761
1363	req->grp_prev = 0;	1762	req->grp_prev = 0;
1364	req->grp_next = grp->grp_first;	1763	req->grp_next = grp->grp_first;
1365		1764
…		…
1370	}	1769	}
1371	}	1770	}
1372	}	1771	}
1373		1772
1374	void	1773	void
		1774	cancel_subs (aio_req_ornot req)
		1775	CODE:
		1776	req_cancel_subs (req);
		1777
		1778	void
1375	result (aio_req grp, ...)	1779	result (aio_req grp, ...)
1376	CODE:	1780	CODE:
1377	{	1781	{
1378	int i;	1782	int i;
		1783	AV *av;
		1784
		1785	grp->errorno = errno;
		1786
1379	AV *av = newAV ();	1787	av = newAV ();
1380		1788
1381	for (i = 1; i < items; ++i )	1789	for (i = 1; i < items; ++i )
1382	av_push (av, newSVsv (ST (i)));	1790	av_push (av, newSVsv (ST (i)));
1383		1791
1384	SvREFCNT_dec (grp->data);	1792	SvREFCNT_dec (grp->sv1);
1385	grp->data = (SV *)av;	1793	grp->sv1 = (SV *)av;
1386	}	1794	}
1387		1795
1388	void	1796	void
		1797	errno (aio_req grp, int errorno = errno)
		1798	CODE:
		1799	grp->errorno = errorno;
		1800
		1801	void
1389	feed_limit (aio_req grp, int limit)	1802	limit (aio_req grp, int limit)
1390	CODE:	1803	CODE:
1391	grp->fd2 = limit;	1804	grp->int2 = limit;
1392	aio_grp_feed (grp);	1805	aio_grp_feed (grp);
1393		1806
1394	void	1807	void
1395	feed (aio_req grp, SV *callback=&PL_sv_undef)	1808	feed (aio_req grp, SV *callback=&PL_sv_undef)
1396	CODE:	1809	CODE:
1397	{	1810	{
1398	SvREFCNT_dec (grp->fh2);	1811	SvREFCNT_dec (grp->sv2);
1399	grp->fh2 = newSVsv (callback);	1812	grp->sv2 = newSVsv (callback);
1400		1813
1401	if (grp->fd2 <= 0)	1814	if (grp->int2 <= 0)
1402	grp->fd2 = 2;	1815	grp->int2 = 2;
1403		1816
1404	aio_grp_feed (grp);	1817	aio_grp_feed (grp);
1405	}	1818	}
1406		1819

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