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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.79 by root, Thu Oct 26 16:28:33 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"
…		…
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
13	#include <errno.h>	22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
14	#include <sys/types.h>	25	#include <sys/types.h>
15	#include <sys/stat.h>	26	#include <sys/stat.h>
16	#include <limits.h>	27	#include <limits.h>
17	#include <unistd.h>	28	#include <unistd.h>
18	#include <fcntl.h>	29	#include <fcntl.h>
…		…
37	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	49	#ifndef NAME_MAX
39	# define NAME_MAX 4096	50	# define NAME_MAX 4096
40	#endif	51	#endif
41		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
42	#if __ia64	58	#if __ia64
43	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	62	#else
45	# define STACKSIZE 8192	63	# define STACKSIZE 16384
46	#endif	64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
		75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
47		88
48	enum {	89	enum {
49	REQ_QUIT,	90	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	97	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,	99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
59	};	101	};
60		102
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		105
64	typedef struct aio_cb	106	typedef struct aio_cb
65	{	107	{
66	struct aio_cb *grp, *grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
69
70	SV *self; /* the perl counterpart of this request, if any */
71		109
72	SV *data, *callback;	110	SV *data, *callback;
73	SV *fh, *fh2;	111	SV *fh, *fh2;
74	void *dataptr, *data2ptr;	112	void *dataptr, *data2ptr;
75	Stat_t *statdata;	113	Stat_t *statdata;
76	off_t offset;	114	off_t offset;
77	size_t length;	115	size_t length;
78	ssize_t result;	116	ssize_t result;
79		117
		118	STRLEN dataoffset;
80	int type;	119	int type;
81	int fd, fd2;	120	int fd, fd2;
82	int errorno;	121	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */	122	mode_t mode; /* open */
		123
85	unsigned char cancelled;	124	unsigned char flags;
		125	unsigned char pri;
		126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
86	} aio_cb;	129	} aio_cb;
		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
87		134
88	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;
91		137
		138	enum {
		139	PRI_MIN = -4,
		140	PRI_MAX = 4,
		141
		142	DEFAULT_PRI = 0,
		143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		145	};
		146
		147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		148
92	static int started, wanted;	149	static unsigned int started, wanted;
93	static volatile int nreqs;	150	static volatile unsigned int nreqs, nready, npending;
94	static int max_outstanding = 1<<30;	151	static volatile unsigned int max_outstanding = 0xffffffff;
95	static int respipe [2];	152	static int respipe [2];
96		153
		154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		156	#else
		157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		158	#endif
		159
		160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		162
		163	/* worker threads management */
		164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		165
		166	typedef struct worker {
		167	/* locked by wrklock */
		168	struct worker *prev, *next;
		169
		170	pthread_t tid;
		171
		172	/* locked by reslock, reqlock or wrklock */
		173	aio_req req; /* currently processed request */
		174	void *dbuf;
		175	DIR *dirp;
		176	} worker;
		177
		178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		179
		180	static void worker_clear (worker *wrk)
		181	{
		182	if (wrk->dirp)
		183	{
		184	closedir (wrk->dirp);
		185	wrk->dirp = 0;
		186	}
		187
		188	if (wrk->dbuf)
		189	{
		190	free (wrk->dbuf);
		191	wrk->dbuf = 0;
		192	}
		193	}
		194
		195	static void worker_free (worker *wrk)
		196	{
		197	wrk->next->prev = wrk->prev;
		198	wrk->prev->next = wrk->next;
		199
		200	free (wrk);
		201	}
		202
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	203	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	205	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		206
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	207	/*
102	static volatile aio_req ress, rese; /* queue start, queue end */	208	* a somewhat faster data structure might be nice, but
		209	* with 8 priorities this actually needs <20 insns
		210	* per shift, the most expensive operation.
		211	*/
		212	typedef struct {
		213	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		214	int size;
		215	} reqq;
		216
		217	static reqq req_queue;
		218	static reqq res_queue;
		219
		220	int reqq_push (reqq *q, aio_req req)
		221	{
		222	int pri = req->pri;
		223	req->next = 0;
		224
		225	if (q->qe[pri])
		226	{
		227	q->qe[pri]->next = req;
		228	q->qe[pri] = req;
		229	}
		230	else
		231	q->qe[pri] = q->qs[pri] = req;
		232
		233	return q->size++;
		234	}
		235
		236	aio_req reqq_shift (reqq *q)
		237	{
		238	int pri;
		239
		240	if (!q->size)
		241	return 0;
		242
		243	--q->size;
		244
		245	for (pri = NUM_PRI; pri--; )
		246	{
		247	aio_req req = q->qs[pri];
		248
		249	if (req)
		250	{
		251	if (!(q->qs[pri] = req->next))
		252	q->qe[pri] = 0;
		253
		254	return req;
		255	}
		256	}
		257
		258	abort ();
		259	}
		260
		261	static int poll_cb (int max);
		262	static void req_invoke (aio_req req);
		263	static void req_free (aio_req req);
		264	static void req_cancel (aio_req req);
103		265
104	/* must be called at most once */	266	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	267	static SV *req_sv (aio_req req, const char *klass)
106	{	268	{
		269	if (!req->self)
		270	{
107	req->self = (SV *)newHV ();	271	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	272	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		273	}
109		274
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	275	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	276	}
112		277
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	278	static aio_req SvAIO_REQ (SV *sv)
114	{	279	{
		280	MAGIC *mg;
		281
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	282	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
116	croak ("object of class %s expected", klass);	283	croak ("object of class " AIO_REQ_KLASS " expected");
117		284
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	285	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		286
120	return mg ? (aio_req)mg->mg_ptr : 0;	287	return mg ? (aio_req)mg->mg_ptr : 0;
		288	}
		289
		290	static void aio_grp_feed (aio_req grp)
		291	{
		292	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		293	{
		294	int old_len = grp->length;
		295
		296	if (grp->fh2 && SvOK (grp->fh2))
		297	{
		298	dSP;
		299
		300	ENTER;
		301	SAVETMPS;
		302	PUSHMARK (SP);
		303	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		304	PUTBACK;
		305	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		306	SPAGAIN;
		307	FREETMPS;
		308	LEAVE;
		309	}
		310
		311	/* stop if no progress has been made */
		312	if (old_len == grp->length)
		313	{
		314	SvREFCNT_dec (grp->fh2);
		315	grp->fh2 = 0;
		316	break;
		317	}
		318	}
		319	}
		320
		321	static void aio_grp_dec (aio_req grp)
		322	{
		323	--grp->length;
		324
		325	/* call feeder, if applicable */
		326	aio_grp_feed (grp);
		327
		328	/* finish, if done */
		329	if (!grp->length && grp->fd)
		330	{
		331	req_invoke (grp);
		332	req_free (grp);
		333	}
		334	}
		335
		336	static void poll_wait ()
		337	{
		338	fd_set rfd;
		339
		340	while (nreqs)
		341	{
		342	int size;
		343	if (WORDREAD_UNSAFE) LOCK (reslock);
		344	size = res_queue.size;
		345	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		346
		347	if (size)
		348	return;
		349
		350	FD_ZERO(&rfd);
		351	FD_SET(respipe [0], &rfd);
		352
		353	select (respipe [0] + 1, &rfd, 0, 0, 0);
		354	}
		355	}
		356
		357	static void req_invoke (aio_req req)
		358	{
		359	dSP;
		360
		361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		362	{
		363	ENTER;
		364	SAVETMPS;
		365	PUSHMARK (SP);
		366	EXTEND (SP, 1);
		367
		368	switch (req->type)
		369	{
		370	case REQ_READDIR:
		371	{
		372	SV *rv = &PL_sv_undef;
		373
		374	if (req->result >= 0)
		375	{
		376	int i;
		377	char *buf = req->data2ptr;
		378	AV *av = newAV ();
		379
		380	av_extend (av, req->result - 1);
		381
		382	for (i = 0; i < req->result; ++i)
		383	{
		384	SV *sv = newSVpv (buf, 0);
		385
		386	av_store (av, i, sv);
		387	buf += SvCUR (sv) + 1;
		388	}
		389
		390	rv = sv_2mortal (newRV_noinc ((SV *)av));
		391	}
		392
		393	PUSHs (rv);
		394	}
		395	break;
		396
		397	case REQ_OPEN:
		398	{
		399	/* convert fd to fh */
		400	SV *fh;
		401
		402	PUSHs (sv_2mortal (newSViv (req->result)));
		403	PUTBACK;
		404	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		405	SPAGAIN;
		406
		407	fh = SvREFCNT_inc (POPs);
		408
		409	PUSHMARK (SP);
		410	XPUSHs (sv_2mortal (fh));
		411	}
		412	break;
		413
		414	case REQ_GROUP:
		415	req->fd = 2; /* mark group as finished */
		416
		417	if (req->data)
		418	{
		419	int i;
		420	AV *av = (AV *)req->data;
		421
		422	EXTEND (SP, AvFILL (av) + 1);
		423	for (i = 0; i <= AvFILL (av); ++i)
		424	PUSHs (*av_fetch (av, i, 0));
		425	}
		426	break;
		427
		428	case REQ_NOP:
		429	case REQ_BUSY:
		430	break;
		431
		432	default:
		433	PUSHs (sv_2mortal (newSViv (req->result)));
		434	break;
		435	}
		436
		437	errno = req->errorno;
		438
		439	PUTBACK;
		440	call_sv (req->callback, G_VOID | G_EVAL);
		441	SPAGAIN;
		442
		443	FREETMPS;
		444	LEAVE;
		445	}
		446
		447	if (req->grp)
		448	{
		449	aio_req grp = req->grp;
		450
		451	/* unlink request */
		452	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		453	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		454
		455	if (grp->grp_first == req)
		456	grp->grp_first = req->grp_next;
		457
		458	aio_grp_dec (grp);
		459	}
		460
		461	if (SvTRUE (ERRSV))
		462	{
		463	req_free (req);
		464	croak (0);
		465	}
121	}	466	}
122		467
123	static void req_free (aio_req req)	468	static void req_free (aio_req req)
124	{	469	{
125	if (req->self)	470	if (req->self)
126	{	471	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	472	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	473	SvREFCNT_dec (req->self);
129	}	474	}
130		475
131	if (req->data)
132	SvREFCNT_dec (req->data);	476	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	477	SvREFCNT_dec (req->fh);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	478	SvREFCNT_dec (req->fh2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	479	SvREFCNT_dec (req->callback);
		480	Safefree (req->statdata);
145		481
146	if (req->type == REQ_READDIR && req->result >= 0)	482	if (req->type == REQ_READDIR)
147	free (req->data2ptr);	483	free (req->data2ptr);
148		484
149	Safefree (req);	485	Safefree (req);
150	}	486	}
151		487
152	static void	488	static void req_cancel_subs (aio_req grp)
153	poll_wait ()
154	{	489	{
155	if (nreqs && !ress)	490	aio_req sub;
156	{
157	fd_set rfd;
158	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);
160		491
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	492	if (grp->type != REQ_GROUP)
162	}	493	return;
163	}
164		494
165	static int	495	SvREFCNT_dec (grp->fh2);
166	poll_cb ()	496	grp->fh2 = 0;
		497
		498	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		499	req_cancel (sub);
		500	}
		501
		502	static void req_cancel (aio_req req)
		503	{
		504	req->flags |= FLAG_CANCELLED;
		505
		506	req_cancel_subs (req);
		507	}
		508
		509	static int poll_cb (int max)
167	{	510	{
168	dSP;	511	dSP;
169	int count = 0;	512	int count = 0;
170	int do_croak = 0;	513	int do_croak = 0;
171	aio_req req;	514	aio_req req;
172		515
173	for (;;)	516	for (;;)
174	{	517	{
175	pthread_mutex_lock (&reslock);	518	while (max <= 0 || count < max)
176	req = ress;
177
178	if (req)
179	{	519	{
180	ress = req->next;	520	LOCK (reslock);
		521	req = reqq_shift (&res_queue);
181		522
182	if (!ress)	523	if (req)
183	{	524	{
		525	--npending;
		526
		527	if (!res_queue.size)
		528	{
184	/* read any signals sent by the worker threads */	529	/* read any signals sent by the worker threads */
185	char buf [32];	530	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)	531	while (read (respipe [0], buf, 32) == 32)
		532	;
187	;	533	}
188
189	rese = 0;
190	}	534	}
191	}
192		535
193	pthread_mutex_unlock (&reslock);	536	UNLOCK (reslock);
194		537
195	if (!req)	538	if (!req)
196	break;	539	break;
197		540
198	nreqs--;	541	--nreqs;
199		542
200	if (req->type == REQ_QUIT)	543	if (req->type == REQ_QUIT)
201	started--;	544	--started;
202	else	545	else if (req->type == REQ_GROUP && req->length)
203	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209
210	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);
212
213	if (req->statdata)
214	{	546	{
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	547	req->fd = 1; /* mark request as delayed */
216	PL_laststatval = req->result;	548	continue;
217	PL_statcache = *(req->statdata);
218	}
219
220	ENTER;
221	PUSHMARK (SP);
222
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}	549	}
246	else	550	else
247	{	551	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)	552	if (req->type == REQ_READ)
		553	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		554
		555	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		556	SvREADONLY_off (req->data);
		557
		558	if (req->statdata)
251	{	559	{
252	/* convert fd to fh */	560	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
253	SV *fh;	561	PL_laststatval = req->result;
254		562	PL_statcache = *(req->statdata);
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}	563	}
		564
		565	req_invoke (req);
		566
		567	count++;
264	}	568	}
265		569
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID | G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{
274	req_free (req);	570	req_free (req);
275	croak (0);
276	}
277	}
278
279	LEAVE;
280
281	errno = errorno;
282	count++;
283	}	571	}
284		572
285	req_free (req);	573	if (nreqs <= max_outstanding)
		574	break;
		575
		576	poll_wait ();
		577
		578	max = 0;
286	}	579	}
287		580
288	return count;	581	return count;
289	}	582	}
290		583
291	static void *aio_proc(void *arg);	584	static void *aio_proc(void *arg);
292		585
293	static void
294	start_thread (void)	586	static void start_thread (void)
295	{	587	{
296	sigset_t fullsigset, oldsigset;	588	sigset_t fullsigset, oldsigset;
297	pthread_t tid;
298	pthread_attr_t attr;	589	pthread_attr_t attr;
		590
		591	worker *wrk = calloc (1, sizeof (worker));
		592
		593	if (!wrk)
		594	croak ("unable to allocate worker thread data");
299		595
300	pthread_attr_init (&attr);	596	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);	597	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303		599
304	sigfillset (&fullsigset);	600	sigfillset (&fullsigset);
		601
		602	LOCK (wrklock);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306		604
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	605	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		606	{
		607	wrk->prev = &wrk_first;
		608	wrk->next = wrk_first.next;
		609	wrk_first.next->prev = wrk;
		610	wrk_first.next = wrk;
308	started++;	611	++started;
		612	}
		613	else
		614	free (wrk);
309		615
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);	616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		617	UNLOCK (wrklock);
311	}	618	}
312		619
313	static void
314	req_send (aio_req req)	620	static void req_send (aio_req req)
315	{	621	{
316	while (started < wanted && nreqs >= started)	622	while (started < wanted && nreqs >= started)
317	start_thread ();	623	start_thread ();
318		624
319	nreqs++;	625	++nreqs;
320		626
321	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
322		628	++nready;
323	req->next = 0;	629	reqq_push (&req_queue, req);
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
335
336	if (nreqs > max_outstanding)
337	for (;;)
338	{
339	poll_cb ();
340
341	if (nreqs <= max_outstanding)
342	break;
343
344	poll_wait ();
345	}
346	}	632	}
347		633
348	static void	634	static void end_thread (void)
349	end_thread (void)
350	{	635	{
351	aio_req req;	636	aio_req req;
		637
352	Newz (0, req, 1, aio_cb);	638	Newz (0, req, 1, aio_cb);
		639
353	req->type = REQ_QUIT;	640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
354		642
355	req_send (req);	643	req_send (req);
356	}	644	}
357		645
358	static void min_parallel (int nthreads)	646	static void min_parallel (int nthreads)
…		…
375	}	663	}
376		664
377	while (started > wanted)	665	while (started > wanted)
378	{	666	{
379	poll_wait ();	667	poll_wait ();
380	poll_cb ();	668	poll_cb (0);
381	}	669	}
382	}	670	}
383		671
384	static void create_pipe ()	672	static void create_pipe ()
385	{	673	{
…		…
405	* normal read/write by using a mutex. slows down execution a lot,	693	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.	694	* but that's your problem, not mine.
407	*/	695	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	696	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		697
410	static ssize_t	698	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{	699	{
413	ssize_t res;	700	ssize_t res;
414	off_t ooffset;	701	off_t ooffset;
415		702
416	pthread_mutex_lock (&preadwritelock);	703	LOCK (preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);	704	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);	705	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);	706	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);	707	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);	708	UNLOCK (preadwritelock);
422		709
423	return res;	710	return res;
424	}	711	}
425		712
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)	713	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
428	{	714	{
429	ssize_t res;	715	ssize_t res;
430	off_t ooffset;	716	off_t ooffset;
431		717
432	pthread_mutex_lock (&preadwritelock);	718	LOCK (preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);	719	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);	720	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);	721	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);	722	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);	723	UNLOCK (preadwritelock);
438		724
439	return res;	725	return res;
440	}	726	}
441	#endif	727	#endif
442		728
443	#if !HAVE_FDATASYNC	729	#if !HAVE_FDATASYNC
444	# define fdatasync fsync	730	# define fdatasync fsync
445	#endif	731	#endif
446		732
447	#if !HAVE_READAHEAD	733	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
449		735
450	static ssize_t	736	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
451	readahead (int fd, off_t offset, size_t count)
452	{	737	{
453	char readahead_buf[4096];	738	dBUF;
454		739
455	while (count > 0)	740	while (count > 0)
456	{	741	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		743
459	pread (fd, readahead_buf, len, offset);	744	pread (fd, aio_buf, len, offset);
460	offset += len;	745	offset += len;
461	count -= len;	746	count -= len;
462	}	747	}
463		748
464	errno = 0;	749	errno = 0;
465	}	750	}
		751
466	#endif	752	#endif
467		753
468	#if !HAVE_READDIR_R	754	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	755	# define readdir_r aio_readdir_r
470		756
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	757	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		758
473	static int
474	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	759	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475	{	760	{
476	struct dirent *e;	761	struct dirent *e;
477	int errorno;	762	int errorno;
478		763
479	pthread_mutex_lock (&readdirlock);	764	LOCK (readdirlock);
480		765
481	e = readdir (dirp);	766	e = readdir (dirp);
482	errorno = errno;	767	errorno = errno;
483		768
484	if (e)	769	if (e)
…		…
487	strcpy (ent->d_name, e->d_name);	772	strcpy (ent->d_name, e->d_name);
488	}	773	}
489	else	774	else
490	*res = 0;	775	*res = 0;
491		776
492	pthread_mutex_unlock (&readdirlock);	777	UNLOCK (readdirlock);
493		778
494	errno = errorno;	779	errno = errorno;
495	return e ? 0 : -1;	780	return e ? 0 : -1;
496	}	781	}
497	#endif	782	#endif
498		783
499	/* sendfile always needs emulation */	784	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	785	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
502	{	786	{
503	ssize_t res;	787	ssize_t res;
504		788
505	if (!count)	789	if (!count)
506	return 0;	790	return 0;
…		…
517	{	801	{
518	off_t sbytes;	802	off_t sbytes;
519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520		804
521	if (res < 0 && sbytes)	805	if (res < 0 && sbytes)
522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
523	res = sbytes;	807	res = sbytes;
524	}	808	}
525		809
526	# elif __hpux	810	# elif __hpux
527	res = sendfile (ofd, ifd, offset, count, 0, 0);	811	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
555	#endif	839	#endif
556	)	840	)
557	)	841	)
558	{	842	{
559	/* emulate sendfile. this is a major pain in the ass */	843	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	844	dBUF;
		845
561	res = 0;	846	res = 0;
562		847
563	while (count)	848	while (count)
564	{	849	{
565	ssize_t cnt;	850	ssize_t cnt;
566		851
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		853
569	if (cnt <= 0)	854	if (cnt <= 0)
570	{	855	{
571	if (cnt && !res) res = -1;	856	if (cnt && !res) res = -1;
572	break;	857	break;
573	}	858	}
574		859
575	cnt = write (ofd, buf, cnt);	860	cnt = write (ofd, aio_buf, cnt);
576		861
577	if (cnt <= 0)	862	if (cnt <= 0)
578	{	863	{
579	if (cnt && !res) res = -1;	864	if (cnt && !res) res = -1;
580	break;	865	break;
…		…
588		873
589	return res;	874	return res;
590	}	875	}
591		876
592	/* read a full directory */	877	/* read a full directory */
593	static int	878	static void scandir_ (aio_req req, worker *self)
594	scandir_ (const char *path, void **namesp)
595	{	879	{
596	DIR *dirp = opendir (path);	880	DIR *dirp;
597	union	881	union
598	{	882	{
599	struct dirent d;	883	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	885	} *u;
602	struct dirent *entp;	886	struct dirent *entp;
603	char *name, *names;	887	char *name, *names;
604	int memlen = 4096;	888	int memlen = 4096;
605	int memofs = 0;	889	int memofs = 0;
606	int res = 0;	890	int res = 0;
607	int errorno;	891	int errorno;
608		892
609	if (!dirp)	893	LOCK (wrklock);
610	return -1;	894	self->dirp = dirp = opendir (req->dataptr);
611		895	self->dbuf = u = malloc (sizeof (*u));
612	names = malloc (memlen);	896	req->data2ptr = names = malloc (memlen);
		897	UNLOCK (wrklock);
613		898
		899	if (dirp && u && names)
614	for (;;)	900	for (;;)
615	{	901	{
		902	errno = 0;
616	errno = 0, readdir_r (dirp, &u.d, &entp);	903	readdir_r (dirp, &u->d, &entp);
617		904
618	if (!entp)	905	if (!entp)
619	break;	906	break;
620		907
621	name = entp->d_name;	908	name = entp->d_name;
622		909
623	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624	{	911	{
625	int len = strlen (name) + 1;	912	int len = strlen (name) + 1;
626		913
627	res++;	914	res++;
628		915
629	while (memofs + len > memlen)	916	while (memofs + len > memlen)
630	{	917	{
631	memlen *= 2;	918	memlen *= 2;
		919	LOCK (wrklock);
632	names = realloc (names, memlen);	920	req->data2ptr = names = realloc (names, memlen);
		921	UNLOCK (wrklock);
		922
633	if (!names)	923	if (!names)
634	break;	924	break;
635	}	925	}
636		926
637	memcpy (names + memofs, name, len);	927	memcpy (names + memofs, name, len);
638	memofs += len;	928	memofs += len;
639	}	929	}
640	}	930	}
641		931
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)	932	if (errno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;	933	res = -1;
650	}	934
651		935	req->result = res;
652	*namesp = (void *)names;
653	return res;
654	}	936	}
655		937
656	/*****************************************************************************/	938	/*****************************************************************************/
657		939
658	static void *
659	aio_proc (void *thr_arg)	940	static void *aio_proc (void *thr_arg)
660	{	941	{
661	aio_req req;	942	aio_req req;
662	int type;	943	int type;
		944	worker *self = (worker *)thr_arg;
663		945
664	do	946	do
665	{	947	{
666	pthread_mutex_lock (&reqlock);	948	LOCK (reqlock);
667		949
668	for (;;)	950	for (;;)
669	{	951	{
670	req = reqs;	952	self->req = req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		953
678	if (req)	954	if (req)
679	break;	955	break;
680		956
681	pthread_cond_wait (&reqwait, &reqlock);	957	pthread_cond_wait (&reqwait, &reqlock);
682	}	958	}
683		959
684	pthread_mutex_unlock (&reqlock);	960	--nready;
		961
		962	UNLOCK (reqlock);
685		963
686	errno = 0; /* strictly unnecessary */	964	errno = 0; /* strictly unnecessary */
		965	type = req->type; /* remember type for QUIT check */
687		966
688	if (!req->cancelled)	967	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	968	switch (type)
690	{	969	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	970	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	971	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693		972
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	973	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
695	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	974	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
696		975
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
700		979
…		…
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
708		987
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	989	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	990	case REQ_READDIR: scandir_ (req, self); break;
712		991
		992	case REQ_BUSY:
		993	{
		994	struct timeval tv;
		995
		996	tv.tv_sec = req->fd;
		997	tv.tv_usec = req->fd2;
		998
		999	req->result = select (0, 0, 0, 0, &tv);
		1000	}
		1001
		1002	case REQ_GROUP:
		1003	case REQ_NOP:
713	case REQ_QUIT:	1004	case REQ_QUIT:
714	break;	1005	break;
715		1006
716	default:	1007	default:
717	req->result = ENOSYS;	1008	req->result = ENOSYS;
718	break;	1009	break;
719	}	1010	}
720		1011
721	req->errorno = errno;	1012	req->errorno = errno;
722		1013
723	pthread_mutex_lock (&reslock);	1014	LOCK (reslock);
724		1015
725	req->next = 0;	1016	++npending;
726		1017
727	if (rese)	1018	if (!reqq_push (&res_queue, req))
728	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */	1019	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);	1020	write (respipe [1], &respipe, 1);
738	}
739		1021
740	pthread_mutex_unlock (&reslock);	1022	self->req = 0;
		1023	worker_clear (self);
		1024
		1025	UNLOCK (reslock);
741	}	1026	}
742	while (type != REQ_QUIT);	1027	while (type != REQ_QUIT);
743		1028
		1029	LOCK (wrklock);
		1030	worker_free (self);
		1031	UNLOCK (wrklock);
		1032
744	return 0;	1033	return 0;
745	}	1034	}
746		1035
747	/*****************************************************************************/	1036	/*****************************************************************************/
748		1037
749	static void atfork_prepare (void)	1038	static void atfork_prepare (void)
750	{	1039	{
751	pthread_mutex_lock (&reqlock);	1040	LOCK (wrklock);
752	pthread_mutex_lock (&reslock);	1041	LOCK (reqlock);
		1042	LOCK (reslock);
753	#if !HAVE_PREADWRITE	1043	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);	1044	LOCK (preadwritelock);
755	#endif	1045	#endif
756	#if !HAVE_READDIR_R	1046	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);	1047	LOCK (readdirlock);
758	#endif	1048	#endif
759	}	1049	}
760		1050
761	static void atfork_parent (void)	1051	static void atfork_parent (void)
762	{	1052	{
763	#if !HAVE_READDIR_R	1053	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);	1054	UNLOCK (readdirlock);
765	#endif	1055	#endif
766	#if !HAVE_PREADWRITE	1056	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);	1057	UNLOCK (preadwritelock);
768	#endif	1058	#endif
769	pthread_mutex_unlock (&reslock);	1059	UNLOCK (reslock);
770	pthread_mutex_unlock (&reqlock);	1060	UNLOCK (reqlock);
		1061	UNLOCK (wrklock);
771	}	1062	}
772		1063
773	static void atfork_child (void)	1064	static void atfork_child (void)
774	{	1065	{
775	aio_req prv;	1066	aio_req prv;
776		1067
		1068	while (prv = reqq_shift (&req_queue))
		1069	req_free (prv);
		1070
		1071	while (prv = reqq_shift (&res_queue))
		1072	req_free (prv);
		1073
		1074	while (wrk_first.next != &wrk_first)
		1075	{
		1076	worker *wrk = wrk_first.next;
		1077
		1078	if (wrk->req)
		1079	req_free (wrk->req);
		1080
		1081	worker_clear (wrk);
		1082	worker_free (wrk);
		1083	}
		1084
777	started = 0;	1085	started = 0;
778		1086	nreqs = 0;
779	while (reqs)
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);
784	}
785
786	reqs = reqe = 0;
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);
793	}
794
795	ress = rese = 0;
796		1087
797	close (respipe [0]);	1088	close (respipe [0]);
798	close (respipe [1]);	1089	close (respipe [1]);
799	create_pipe ();	1090	create_pipe ();
800		1091
801	atfork_parent ();	1092	atfork_parent ();
802	}	1093	}
803		1094
804	#define dREQ \	1095	#define dREQ \
805	aio_req req; \	1096	aio_req req; \
		1097	int req_pri = next_pri; \
		1098	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	1099	\
807	if (SvOK (callback) && !SvROK (callback)) \	1100	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	1101	croak ("callback must be undef or of reference type"); \
809	\	1102	\
810	Newz (0, req, 1, aio_cb); \	1103	Newz (0, req, 1, aio_cb); \
811	if (!req) \	1104	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1105	croak ("out of memory during aio_req allocation"); \
813	\	1106	\
814	req->callback = newSVsv (callback)	1107	req->callback = newSVsv (callback); \
		1108	req->pri = req_pri
815		1109
816	#define REQ_SEND \	1110	#define REQ_SEND \
817	req_send (req); \	1111	req_send (req); \
818	\	1112	\
819	if (GIMME_V != G_VOID) \	1113	if (GIMME_V != G_VOID) \
…		…
833	create_pipe ();	1127	create_pipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}	1129	}
836		1130
837	void	1131	void
838	min_parallel (nthreads)	1132	min_parallel (int nthreads)
839	int nthreads
840	PROTOTYPE: $	1133	PROTOTYPE: $
841		1134
842	void	1135	void
843	max_parallel (nthreads)	1136	max_parallel (int nthreads)
844	int nthreads
845	PROTOTYPE: $	1137	PROTOTYPE: $
846		1138
847	int	1139	int
848	max_outstanding (nreqs)	1140	max_outstanding (int maxreqs)
849	int nreqs	1141	PROTOTYPE: $
850	PROTOTYPE: $
851	CODE:	1142	CODE:
852	RETVAL = max_outstanding;	1143	RETVAL = max_outstanding;
853	max_outstanding = nreqs;	1144	max_outstanding = maxreqs;
		1145	OUTPUT:
		1146	RETVAL
854		1147
855	void	1148	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
857	SV * pathname	1150	SV * pathname
858	int flags	1151	int flags
…		…
1073		1366
1074	REQ_SEND;	1367	REQ_SEND;
1075	}	1368	}
1076		1369
1077	void	1370	void
		1371	aio_busy (delay,callback=&PL_sv_undef)
		1372	double delay
		1373	SV * callback
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = REQ_BUSY;
		1379	req->fd = delay < 0. ? 0 : delay;
		1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1381
		1382	REQ_SEND;
		1383	}
		1384
		1385	void
1078	aio_group (callback=&PL_sv_undef)	1386	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1387	SV * callback
1080	PROTOTYPE: ;&	1388	PROTOTYPE: ;$
1081	PPCODE:	1389	PPCODE:
1082	{	1390	{
1083	dREQ;	1391	dREQ;
		1392
1084	req->type = REQ_GROUP;	1393	req->type = REQ_GROUP;
		1394	req_send (req);
		1395
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1397	}
		1398
		1399	void
		1400	aio_nop (callback=&PL_sv_undef)
		1401	SV * callback
		1402	PPCODE:
		1403	{
		1404	dREQ;
		1405
		1406	req->type = REQ_NOP;
		1407
		1408	REQ_SEND;
		1409	}
		1410
		1411	int
		1412	aioreq_pri (int pri = 0)
		1413	PROTOTYPE: ;$
		1414	CODE:
		1415	RETVAL = next_pri - PRI_BIAS;
		1416	if (items > 0)
		1417	{
		1418	if (pri < PRI_MIN) pri = PRI_MIN;
		1419	if (pri > PRI_MAX) pri = PRI_MAX;
		1420	next_pri = pri + PRI_BIAS;
		1421	}
		1422	OUTPUT:
		1423	RETVAL
		1424
		1425	void
		1426	aioreq_nice (int nice = 0)
		1427	CODE:
		1428	nice = next_pri - nice;
		1429	if (nice < PRI_MIN) nice = PRI_MIN;
		1430	if (nice > PRI_MAX) nice = PRI_MAX;
		1431	next_pri = nice + PRI_BIAS;
1087		1432
1088	void	1433	void
1089	flush ()	1434	flush ()
1090	PROTOTYPE:	1435	PROTOTYPE:
1091	CODE:	1436	CODE:
1092	while (nreqs)	1437	while (nreqs)
1093	{	1438	{
1094	poll_wait ();	1439	poll_wait ();
1095	poll_cb ();	1440	poll_cb (0);
1096	}	1441	}
1097		1442
1098	void	1443	void
1099	poll()	1444	poll()
1100	PROTOTYPE:	1445	PROTOTYPE:
1101	CODE:	1446	CODE:
1102	if (nreqs)	1447	if (nreqs)
1103	{	1448	{
1104	poll_wait ();	1449	poll_wait ();
1105	poll_cb ();	1450	poll_cb (0);
1106	}	1451	}
1107		1452
1108	int	1453	int
1109	poll_fileno()	1454	poll_fileno()
1110	PROTOTYPE:	1455	PROTOTYPE:
…		…
1115		1460
1116	int	1461	int
1117	poll_cb(...)	1462	poll_cb(...)
1118	PROTOTYPE:	1463	PROTOTYPE:
1119	CODE:	1464	CODE:
1120	RETVAL = poll_cb ();	1465	RETVAL = poll_cb (0);
		1466	OUTPUT:
		1467	RETVAL
		1468
		1469	int
		1470	poll_some(int max = 0)
		1471	PROTOTYPE: $
		1472	CODE:
		1473	RETVAL = poll_cb (max);
1121	OUTPUT:	1474	OUTPUT:
1122	RETVAL	1475	RETVAL
1123		1476
1124	void	1477	void
1125	poll_wait()	1478	poll_wait()
…		…
1134	CODE:	1487	CODE:
1135	RETVAL = nreqs;	1488	RETVAL = nreqs;
1136	OUTPUT:	1489	OUTPUT:
1137	RETVAL	1490	RETVAL
1138		1491
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1492	int
1140		1493	nready()
1141	void
1142	cancel (aio_req_ornot req)
1143	PROTOTYPE:	1494	PROTOTYPE:
1144	CODE:	1495	CODE:
1145	req->cancelled = 1;	1496	if (WORDREAD_UNSAFE) LOCK (reqlock);
		1497	RETVAL = nready;
		1498	if (WORDREAD_UNSAFE) UNLOCK (reqlock);
		1499	OUTPUT:
		1500	RETVAL
1146		1501
		1502	int
		1503	npending()
		1504	PROTOTYPE:
		1505	CODE:
		1506	if (WORDREAD_UNSAFE) LOCK (reslock);
		1507	RETVAL = npending;
		1508	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		1509	OUTPUT:
		1510	RETVAL
		1511
		1512	PROTOTYPES: DISABLE
		1513
		1514	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1515
		1516	void
		1517	cancel (aio_req_ornot req)
		1518	CODE:
		1519	req_cancel (req);
		1520
		1521	void
		1522	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1523	CODE:
		1524	SvREFCNT_dec (req->callback);
		1525	req->callback = newSVsv (callback);
		1526
		1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1528
		1529	void
		1530	add (aio_req grp, ...)
		1531	PPCODE:
		1532	{
		1533	int i;
		1534	aio_req req;
		1535
		1536	if (grp->fd == 2)
		1537	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1538
		1539	for (i = 1; i < items; ++i )
		1540	{
		1541	if (GIMME_V != G_VOID)
		1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1543
		1544	req = SvAIO_REQ (ST (i));
		1545
		1546	if (req)
		1547	{
		1548	++grp->length;
		1549	req->grp = grp;
		1550
		1551	req->grp_prev = 0;
		1552	req->grp_next = grp->grp_first;
		1553
		1554	if (grp->grp_first)
		1555	grp->grp_first->grp_prev = req;
		1556
		1557	grp->grp_first = req;
		1558	}
		1559	}
		1560	}
		1561
		1562	void
		1563	cancel_subs (aio_req_ornot req)
		1564	CODE:
		1565	req_cancel_subs (req);
		1566
		1567	void
		1568	result (aio_req grp, ...)
		1569	CODE:
		1570	{
		1571	int i;
		1572	AV *av;
		1573
		1574	grp->errorno = errno;
		1575
		1576	av = newAV ();
		1577
		1578	for (i = 1; i < items; ++i )
		1579	av_push (av, newSVsv (ST (i)));
		1580
		1581	SvREFCNT_dec (grp->data);
		1582	grp->data = (SV *)av;
		1583	}
		1584
		1585	void
		1586	errno (aio_req grp, int errorno = errno)
		1587	CODE:
		1588	grp->errorno = errorno;
		1589
		1590	void
		1591	limit (aio_req grp, int limit)
		1592	CODE:
		1593	grp->fd2 = limit;
		1594	aio_grp_feed (grp);
		1595
		1596	void
		1597	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1598	CODE:
		1599	{
		1600	SvREFCNT_dec (grp->fh2);
		1601	grp->fh2 = newSVsv (callback);
		1602
		1603	if (grp->fd2 <= 0)
		1604	grp->fd2 = 2;
		1605
		1606	aio_grp_feed (grp);
		1607	}
		1608

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