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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 1.78 by root, Thu Oct 26 14:35:34 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	/* buffer size for various temporary buffers */
		67	#define AIO_BUFSIZE 65536
		68
		69	#define dBUF \
		70	char *aio_buf; \
		71	LOCK (wrklock); \
		72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		73	UNLOCK (wrklock); \
		74	if (!aio_buf) \
		75	return -1;
47		76
48	enum {	77	enum {
49	REQ_QUIT,	78	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	79	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	83	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	85	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	86	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,	87	REQ_GROUP, REQ_NOP,
		88	REQ_BUSY,
59	};	89	};
60		90
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	91	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	92	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		93
64	typedef struct aio_cb	94	typedef struct aio_cb
65	{	95	{
66	struct aio_cb *grp, *grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	96	struct aio_cb *volatile next;
69
70	SV *self; /* the perl counterpart of this request, if any */
71		97
72	SV *data, *callback;	98	SV *data, *callback;
73	SV *fh, *fh2;	99	SV *fh, *fh2;
74	void *dataptr, *data2ptr;	100	void *dataptr, *data2ptr;
75	Stat_t *statdata;	101	Stat_t *statdata;
76	off_t offset;	102	off_t offset;
77	size_t length;	103	size_t length;
78	ssize_t result;	104	ssize_t result;
79		105
		106	STRLEN dataoffset;
80	int type;	107	int type;
81	int fd, fd2;	108	int fd, fd2;
82	int errorno;	109	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */	110	mode_t mode; /* open */
		111
85	unsigned char cancelled;	112	unsigned char flags;
		113	unsigned char pri;
		114
		115	SV *self; /* the perl counterpart of this request, if any */
		116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
86	} aio_cb;	117	} aio_cb;
		118
		119	enum {
		120	FLAG_CANCELLED = 0x01,
		121	};
87		122
88	typedef aio_cb *aio_req;	123	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	124	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;
91		125
		126	enum {
		127	PRI_MIN = -4,
		128	PRI_MAX = 4,
		129
		130	DEFAULT_PRI = 0,
		131	PRI_BIAS = -PRI_MIN,
		132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		133	};
		134
		135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		136
92	static int started, wanted;	137	static unsigned int started, wanted;
93	static volatile int nreqs;	138	static volatile unsigned int nreqs;
94	static int max_outstanding = 1<<30;	139	static volatile unsigned int max_outstanding = 0xffffffff;
95	static int respipe [2];	140	static int respipe [2];
96		141
		142	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		143	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		144	#else
		145	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		146	#endif
		147
		148	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		149	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		150
		151	/* worker threads management */
		152	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		153
		154	typedef struct worker {
		155	/* locked by wrklock */
		156	struct worker *prev, *next;
		157
		158	pthread_t tid;
		159
		160	/* locked by reslock, reqlock or wrklock */
		161	aio_req req; /* currently processed request */
		162	void *dbuf;
		163	DIR *dirp;
		164	} worker;
		165
		166	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		167
		168	static void worker_clear (worker *wrk)
		169	{
		170	if (wrk->dirp)
		171	{
		172	closedir (wrk->dirp);
		173	wrk->dirp = 0;
		174	}
		175
		176	if (wrk->dbuf)
		177	{
		178	free (wrk->dbuf);
		179	wrk->dbuf = 0;
		180	}
		181	}
		182
		183	static void worker_free (worker *wrk)
		184	{
		185	wrk->next->prev = wrk->prev;
		186	wrk->prev->next = wrk->next;
		187
		188	free (wrk);
		189	}
		190
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	191	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	192	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	193	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		194
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	195	/*
102	static volatile aio_req ress, rese; /* queue start, queue end */	196	* a somewhat faster data structure might be nice, but
		197	* with 8 priorities this actually needs <20 insns
		198	* per shift, the most expensive operation.
		199	*/
		200	typedef struct {
		201	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		202	int size;
		203	} reqq;
		204
		205	static reqq req_queue;
		206	static reqq res_queue;
		207
		208	int reqq_push (reqq *q, aio_req req)
		209	{
		210	int pri = req->pri;
		211	req->next = 0;
		212
		213	if (q->qe[pri])
		214	{
		215	q->qe[pri]->next = req;
		216	q->qe[pri] = req;
		217	}
		218	else
		219	q->qe[pri] = q->qs[pri] = req;
		220
		221	return q->size++;
		222	}
		223
		224	aio_req reqq_shift (reqq *q)
		225	{
		226	int pri;
		227
		228	if (!q->size)
		229	return 0;
		230
		231	--q->size;
		232
		233	for (pri = NUM_PRI; pri--; )
		234	{
		235	aio_req req = q->qs[pri];
		236
		237	if (req)
		238	{
		239	if (!(q->qs[pri] = req->next))
		240	q->qe[pri] = 0;
		241
		242	return req;
		243	}
		244	}
		245
		246	abort ();
		247	}
		248
		249	static int poll_cb (int max);
		250	static void req_invoke (aio_req req);
		251	static void req_free (aio_req req);
		252	static void req_cancel (aio_req req);
103		253
104	/* must be called at most once */	254	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	255	static SV *req_sv (aio_req req, const char *klass)
106	{	256	{
		257	if (!req->self)
		258	{
107	req->self = (SV *)newHV ();	259	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		261	}
109		262
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	263	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	264	}
112		265
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	266	static aio_req SvAIO_REQ (SV *sv)
114	{	267	{
		268	MAGIC *mg;
		269
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	270	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
116	croak ("object of class %s expected", klass);	271	croak ("object of class " AIO_REQ_KLASS " expected");
117		272
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	273	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		274
120	return mg ? (aio_req)mg->mg_ptr : 0;	275	return mg ? (aio_req)mg->mg_ptr : 0;
		276	}
		277
		278	static void aio_grp_feed (aio_req grp)
		279	{
		280	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		281	{
		282	int old_len = grp->length;
		283
		284	if (grp->fh2 && SvOK (grp->fh2))
		285	{
		286	dSP;
		287
		288	ENTER;
		289	SAVETMPS;
		290	PUSHMARK (SP);
		291	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		292	PUTBACK;
		293	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		294	SPAGAIN;
		295	FREETMPS;
		296	LEAVE;
		297	}
		298
		299	/* stop if no progress has been made */
		300	if (old_len == grp->length)
		301	{
		302	SvREFCNT_dec (grp->fh2);
		303	grp->fh2 = 0;
		304	break;
		305	}
		306	}
		307	}
		308
		309	static void aio_grp_dec (aio_req grp)
		310	{
		311	--grp->length;
		312
		313	/* call feeder, if applicable */
		314	aio_grp_feed (grp);
		315
		316	/* finish, if done */
		317	if (!grp->length && grp->fd)
		318	{
		319	req_invoke (grp);
		320	req_free (grp);
		321	}
		322	}
		323
		324	static void poll_wait ()
		325	{
		326	fd_set rfd;
		327
		328	while (nreqs)
		329	{
		330	int size;
		331	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		332	LOCK (reslock);
		333	#endif
		334	size = res_queue.size;
		335	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		336	UNLOCK (reslock);
		337	#endif
		338
		339	if (size)
		340	return;
		341
		342	FD_ZERO(&rfd);
		343	FD_SET(respipe [0], &rfd);
		344
		345	select (respipe [0] + 1, &rfd, 0, 0, 0);
		346	}
		347	}
		348
		349	static void req_invoke (aio_req req)
		350	{
		351	dSP;
		352
		353	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		354	{
		355	errno = req->errorno;
		356
		357	ENTER;
		358	SAVETMPS;
		359	PUSHMARK (SP);
		360	EXTEND (SP, 1);
		361
		362	switch (req->type)
		363	{
		364	case REQ_READDIR:
		365	{
		366	SV *rv = &PL_sv_undef;
		367
		368	if (req->result >= 0)
		369	{
		370	int i;
		371	char *buf = req->data2ptr;
		372	AV *av = newAV ();
		373
		374	av_extend (av, req->result - 1);
		375
		376	for (i = 0; i < req->result; ++i)
		377	{
		378	SV *sv = newSVpv (buf, 0);
		379
		380	av_store (av, i, sv);
		381	buf += SvCUR (sv) + 1;
		382	}
		383
		384	rv = sv_2mortal (newRV_noinc ((SV *)av));
		385	}
		386
		387	PUSHs (rv);
		388	}
		389	break;
		390
		391	case REQ_OPEN:
		392	{
		393	/* convert fd to fh */
		394	SV *fh;
		395
		396	PUSHs (sv_2mortal (newSViv (req->result)));
		397	PUTBACK;
		398	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		399	SPAGAIN;
		400
		401	fh = SvREFCNT_inc (POPs);
		402
		403	PUSHMARK (SP);
		404	XPUSHs (sv_2mortal (fh));
		405	}
		406	break;
		407
		408	case REQ_GROUP:
		409	req->fd = 2; /* mark group as finished */
		410
		411	if (req->data)
		412	{
		413	int i;
		414	AV *av = (AV *)req->data;
		415
		416	EXTEND (SP, AvFILL (av) + 1);
		417	for (i = 0; i <= AvFILL (av); ++i)
		418	PUSHs (*av_fetch (av, i, 0));
		419	}
		420	break;
		421
		422	case REQ_NOP:
		423	case REQ_BUSY:
		424	break;
		425
		426	default:
		427	PUSHs (sv_2mortal (newSViv (req->result)));
		428	break;
		429	}
		430
		431
		432	PUTBACK;
		433	call_sv (req->callback, G_VOID | G_EVAL);
		434	SPAGAIN;
		435
		436	FREETMPS;
		437	LEAVE;
		438	}
		439
		440	if (req->grp)
		441	{
		442	aio_req grp = req->grp;
		443
		444	/* unlink request */
		445	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		446	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		447
		448	if (grp->grp_first == req)
		449	grp->grp_first = req->grp_next;
		450
		451	aio_grp_dec (grp);
		452	}
		453
		454	if (SvTRUE (ERRSV))
		455	{
		456	req_free (req);
		457	croak (0);
		458	}
121	}	459	}
122		460
123	static void req_free (aio_req req)	461	static void req_free (aio_req req)
124	{	462	{
125	if (req->self)	463	if (req->self)
126	{	464	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	465	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	466	SvREFCNT_dec (req->self);
129	}	467	}
130		468
131	if (req->data)
132	SvREFCNT_dec (req->data);	469	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	470	SvREFCNT_dec (req->fh);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	471	SvREFCNT_dec (req->fh2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	472	SvREFCNT_dec (req->callback);
		473	Safefree (req->statdata);
145		474
146	if (req->type == REQ_READDIR && req->result >= 0)	475	if (req->type == REQ_READDIR)
147	free (req->data2ptr);	476	free (req->data2ptr);
148		477
149	Safefree (req);	478	Safefree (req);
150	}	479	}
151		480
152	static void	481	static void req_cancel_subs (aio_req grp)
153	poll_wait ()
154	{	482	{
155	if (nreqs && !ress)	483	aio_req sub;
156	{
157	fd_set rfd;
158	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);
160		484
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	485	if (grp->type != REQ_GROUP)
162	}	486	return;
163	}
164		487
165	static int	488	SvREFCNT_dec (grp->fh2);
166	poll_cb ()	489	grp->fh2 = 0;
		490
		491	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		492	req_cancel (sub);
		493	}
		494
		495	static void req_cancel (aio_req req)
		496	{
		497	req->flags |= FLAG_CANCELLED;
		498
		499	req_cancel_subs (req);
		500	}
		501
		502	static int poll_cb (int max)
167	{	503	{
168	dSP;	504	dSP;
169	int count = 0;	505	int count = 0;
170	int do_croak = 0;	506	int do_croak = 0;
171	aio_req req;	507	aio_req req;
172		508
173	for (;;)	509	for (;;)
174	{	510	{
175	pthread_mutex_lock (&reslock);	511	while (max <= 0 || count < max)
176	req = ress;
177
178	if (req)
179	{	512	{
180	ress = req->next;	513	LOCK (reslock);
		514	req = reqq_shift (&res_queue);
181		515
182	if (!ress)	516	if (req)
183	{	517	{
		518	if (!res_queue.size)
		519	{
184	/* read any signals sent by the worker threads */	520	/* read any signals sent by the worker threads */
185	char buf [32];	521	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)	522	while (read (respipe [0], buf, 32) == 32)
		523	;
187	;	524	}
188
189	rese = 0;
190	}	525	}
191	}
192		526
193	pthread_mutex_unlock (&reslock);	527	UNLOCK (reslock);
194		528
195	if (!req)	529	if (!req)
196	break;	530	break;
197		531
198	nreqs--;	532	--nreqs;
199		533
200	if (req->type == REQ_QUIT)	534	if (req->type == REQ_QUIT)
201	started--;	535	--started;
202	else	536	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	{	537	{
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	538	req->fd = 1; /* mark request as delayed */
216	PL_laststatval = req->result;	539	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	}	540	}
246	else	541	else
247	{	542	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)	543	if (req->type == REQ_READ)
		544	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		545
		546	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		547	SvREADONLY_off (req->data);
		548
		549	if (req->statdata)
251	{	550	{
252	/* convert fd to fh */	551	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
253	SV *fh;	552	PL_laststatval = req->result;
254		553	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	}	554	}
		555
		556	req_invoke (req);
		557
		558	count++;
264	}	559	}
265		560
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);	561	req_free (req);
275	croak (0);
276	}
277	}
278
279	LEAVE;
280
281	errno = errorno;
282	count++;
283	}	562	}
284		563
285	req_free (req);	564	if (nreqs <= max_outstanding)
		565	break;
		566
		567	poll_wait ();
		568
		569	max = 0;
286	}	570	}
287		571
288	return count;	572	return count;
289	}	573	}
290		574
291	static void *aio_proc(void *arg);	575	static void *aio_proc(void *arg);
292		576
293	static void
294	start_thread (void)	577	static void start_thread (void)
295	{	578	{
296	sigset_t fullsigset, oldsigset;	579	sigset_t fullsigset, oldsigset;
297	pthread_t tid;
298	pthread_attr_t attr;	580	pthread_attr_t attr;
		581
		582	worker *wrk = calloc (1, sizeof (worker));
		583
		584	if (!wrk)
		585	croak ("unable to allocate worker thread data");
299		586
300	pthread_attr_init (&attr);	587	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);	588	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303		590
304	sigfillset (&fullsigset);	591	sigfillset (&fullsigset);
		592
		593	LOCK (wrklock);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306		595
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		597	{
		598	wrk->prev = &wrk_first;
		599	wrk->next = wrk_first.next;
		600	wrk_first.next->prev = wrk;
		601	wrk_first.next = wrk;
308	started++;	602	++started;
		603	}
		604	else
		605	free (wrk);
309		606
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);	607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		608	UNLOCK (wrklock);
311	}	609	}
312		610
313	static void
314	req_send (aio_req req)	611	static void req_send (aio_req req)
315	{	612	{
316	while (started < wanted && nreqs >= started)	613	while (started < wanted && nreqs >= started)
317	start_thread ();	614	start_thread ();
318		615
319	nreqs++;	616	++nreqs;
320		617
321	pthread_mutex_lock (&reqlock);	618	LOCK (reqlock);
322		619	reqq_push (&req_queue, req);
323	req->next = 0;
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);	620	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);	621	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	}	622	}
347		623
348	static void	624	static void end_thread (void)
349	end_thread (void)
350	{	625	{
351	aio_req req;	626	aio_req req;
		627
352	Newz (0, req, 1, aio_cb);	628	Newz (0, req, 1, aio_cb);
		629
353	req->type = REQ_QUIT;	630	req->type = REQ_QUIT;
		631	req->pri = PRI_MAX + PRI_BIAS;
354		632
355	req_send (req);	633	req_send (req);
356	}	634	}
357		635
358	static void min_parallel (int nthreads)	636	static void min_parallel (int nthreads)
…		…
375	}	653	}
376		654
377	while (started > wanted)	655	while (started > wanted)
378	{	656	{
379	poll_wait ();	657	poll_wait ();
380	poll_cb ();	658	poll_cb (0);
381	}	659	}
382	}	660	}
383		661
384	static void create_pipe ()	662	static void create_pipe ()
385	{	663	{
…		…
405	* normal read/write by using a mutex. slows down execution a lot,	683	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.	684	* but that's your problem, not mine.
407	*/	685	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	686	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		687
410	static ssize_t	688	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	{	689	{
413	ssize_t res;	690	ssize_t res;
414	off_t ooffset;	691	off_t ooffset;
415		692
416	pthread_mutex_lock (&preadwritelock);	693	LOCK (preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);	696	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);	697	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);	698	UNLOCK (preadwritelock);
422		699
423	return res;	700	return res;
424	}	701	}
425		702
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)	703	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
428	{	704	{
429	ssize_t res;	705	ssize_t res;
430	off_t ooffset;	706	off_t ooffset;
431		707
432	pthread_mutex_lock (&preadwritelock);	708	LOCK (preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);	709	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);	710	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);	711	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);	712	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);	713	UNLOCK (preadwritelock);
438		714
439	return res;	715	return res;
440	}	716	}
441	#endif	717	#endif
442		718
443	#if !HAVE_FDATASYNC	719	#if !HAVE_FDATASYNC
444	# define fdatasync fsync	720	# define fdatasync fsync
445	#endif	721	#endif
446		722
447	#if !HAVE_READAHEAD	723	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	724	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
449		725
450	static ssize_t	726	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	{	727	{
453	char readahead_buf[4096];	728	dBUF;
454		729
455	while (count > 0)	730	while (count > 0)
456	{	731	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	732	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		733
459	pread (fd, readahead_buf, len, offset);	734	pread (fd, aio_buf, len, offset);
460	offset += len;	735	offset += len;
461	count -= len;	736	count -= len;
462	}	737	}
463		738
464	errno = 0;	739	errno = 0;
465	}	740	}
		741
466	#endif	742	#endif
467		743
468	#if !HAVE_READDIR_R	744	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	745	# define readdir_r aio_readdir_r
470		746
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	747	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		748
473	static int
474	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	749	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475	{	750	{
476	struct dirent *e;	751	struct dirent *e;
477	int errorno;	752	int errorno;
478		753
479	pthread_mutex_lock (&readdirlock);	754	LOCK (readdirlock);
480		755
481	e = readdir (dirp);	756	e = readdir (dirp);
482	errorno = errno;	757	errorno = errno;
483		758
484	if (e)	759	if (e)
…		…
487	strcpy (ent->d_name, e->d_name);	762	strcpy (ent->d_name, e->d_name);
488	}	763	}
489	else	764	else
490	*res = 0;	765	*res = 0;
491		766
492	pthread_mutex_unlock (&readdirlock);	767	UNLOCK (readdirlock);
493		768
494	errno = errorno;	769	errno = errorno;
495	return e ? 0 : -1;	770	return e ? 0 : -1;
496	}	771	}
497	#endif	772	#endif
498		773
499	/* sendfile always needs emulation */	774	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	775	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
502	{	776	{
503	ssize_t res;	777	ssize_t res;
504		778
505	if (!count)	779	if (!count)
506	return 0;	780	return 0;
…		…
517	{	791	{
518	off_t sbytes;	792	off_t sbytes;
519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	793	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520		794
521	if (res < 0 && sbytes)	795	if (res < 0 && sbytes)
522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	796	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
523	res = sbytes;	797	res = sbytes;
524	}	798	}
525		799
526	# elif __hpux	800	# elif __hpux
527	res = sendfile (ofd, ifd, offset, count, 0, 0);	801	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
555	#endif	829	#endif
556	)	830	)
557	)	831	)
558	{	832	{
559	/* emulate sendfile. this is a major pain in the ass */	833	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	834	dBUF;
		835
561	res = 0;	836	res = 0;
562		837
563	while (count)	838	while (count)
564	{	839	{
565	ssize_t cnt;	840	ssize_t cnt;
566		841
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	842	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		843
569	if (cnt <= 0)	844	if (cnt <= 0)
570	{	845	{
571	if (cnt && !res) res = -1;	846	if (cnt && !res) res = -1;
572	break;	847	break;
573	}	848	}
574		849
575	cnt = write (ofd, buf, cnt);	850	cnt = write (ofd, aio_buf, cnt);
576		851
577	if (cnt <= 0)	852	if (cnt <= 0)
578	{	853	{
579	if (cnt && !res) res = -1;	854	if (cnt && !res) res = -1;
580	break;	855	break;
…		…
588		863
589	return res;	864	return res;
590	}	865	}
591		866
592	/* read a full directory */	867	/* read a full directory */
593	static int	868	static void scandir_ (aio_req req, worker *self)
594	scandir_ (const char *path, void **namesp)
595	{	869	{
596	DIR *dirp = opendir (path);	870	DIR *dirp;
597	union	871	union
598	{	872	{
599	struct dirent d;	873	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	874	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	875	} *u;
602	struct dirent *entp;	876	struct dirent *entp;
603	char *name, *names;	877	char *name, *names;
604	int memlen = 4096;	878	int memlen = 4096;
605	int memofs = 0;	879	int memofs = 0;
606	int res = 0;	880	int res = 0;
607	int errorno;	881	int errorno;
608		882
609	if (!dirp)	883	LOCK (wrklock);
610	return -1;	884	self->dirp = dirp = opendir (req->dataptr);
611		885	self->dbuf = u = malloc (sizeof (*u));
612	names = malloc (memlen);	886	req->data2ptr = names = malloc (memlen);
		887	UNLOCK (wrklock);
613		888
		889	if (dirp && u && names)
614	for (;;)	890	for (;;)
615	{	891	{
		892	errno = 0;
616	errno = 0, readdir_r (dirp, &u.d, &entp);	893	readdir_r (dirp, &u->d, &entp);
617		894
618	if (!entp)	895	if (!entp)
619	break;	896	break;
620		897
621	name = entp->d_name;	898	name = entp->d_name;
622		899
623	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	900	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624	{	901	{
625	int len = strlen (name) + 1;	902	int len = strlen (name) + 1;
626		903
627	res++;	904	res++;
628		905
629	while (memofs + len > memlen)	906	while (memofs + len > memlen)
630	{	907	{
631	memlen *= 2;	908	memlen *= 2;
		909	LOCK (wrklock);
632	names = realloc (names, memlen);	910	req->data2ptr = names = realloc (names, memlen);
		911	UNLOCK (wrklock);
		912
633	if (!names)	913	if (!names)
634	break;	914	break;
635	}	915	}
636		916
637	memcpy (names + memofs, name, len);	917	memcpy (names + memofs, name, len);
638	memofs += len;	918	memofs += len;
639	}	919	}
640	}	920	}
641		921
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)	922	if (errno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;	923	res = -1;
650	}	924
651		925	req->result = res;
652	*namesp = (void *)names;
653	return res;
654	}	926	}
655		927
656	/*****************************************************************************/	928	/*****************************************************************************/
657		929
658	static void *
659	aio_proc (void *thr_arg)	930	static void *aio_proc (void *thr_arg)
660	{	931	{
661	aio_req req;	932	aio_req req;
662	int type;	933	int type;
		934	worker *self = (worker *)thr_arg;
663		935
664	do	936	do
665	{	937	{
666	pthread_mutex_lock (&reqlock);	938	LOCK (reqlock);
667		939
668	for (;;)	940	for (;;)
669	{	941	{
670	req = reqs;	942	self->req = req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		943
678	if (req)	944	if (req)
679	break;	945	break;
680		946
681	pthread_cond_wait (&reqwait, &reqlock);	947	pthread_cond_wait (&reqwait, &reqlock);
682	}	948	}
683		949
684	pthread_mutex_unlock (&reqlock);	950	UNLOCK (reqlock);
685		951
686	errno = 0; /* strictly unnecessary */	952	errno = 0; /* strictly unnecessary */
		953	type = req->type; /* remember type for QUIT check */
687		954
688	if (!req->cancelled)	955	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	956	switch (type)
690	{	957	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	958	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;	959	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693		960
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	961	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;	962	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
696		963
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	964	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	965	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	966	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
700		967
…		…
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	973	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	974	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
708		975
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	976	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	977	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	978	case REQ_READDIR: scandir_ (req, self); break;
712		979
		980	case REQ_BUSY:
		981	{
		982	struct timeval tv;
		983
		984	tv.tv_sec = req->fd;
		985	tv.tv_usec = req->fd2;
		986
		987	req->result = select (0, 0, 0, 0, &tv);
		988	}
		989
		990	case REQ_GROUP:
		991	case REQ_NOP:
713	case REQ_QUIT:	992	case REQ_QUIT:
714	break;	993	break;
715		994
716	default:	995	default:
717	req->result = ENOSYS;	996	req->result = ENOSYS;
718	break;	997	break;
719	}	998	}
720		999
721	req->errorno = errno;	1000	req->errorno = errno;
722		1001
723	pthread_mutex_lock (&reslock);	1002	LOCK (reslock);
724		1003
725	req->next = 0;	1004	if (!reqq_push (&res_queue, req))
726
727	if (rese)
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 */	1005	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);	1006	write (respipe [1], &respipe, 1);
738	}
739		1007
740	pthread_mutex_unlock (&reslock);	1008	self->req = 0;
		1009	worker_clear (self);
		1010
		1011	UNLOCK (reslock);
741	}	1012	}
742	while (type != REQ_QUIT);	1013	while (type != REQ_QUIT);
743		1014
		1015	LOCK (wrklock);
		1016	worker_free (self);
		1017	UNLOCK (wrklock);
		1018
744	return 0;	1019	return 0;
745	}	1020	}
746		1021
747	/*****************************************************************************/	1022	/*****************************************************************************/
748		1023
749	static void atfork_prepare (void)	1024	static void atfork_prepare (void)
750	{	1025	{
751	pthread_mutex_lock (&reqlock);	1026	LOCK (wrklock);
752	pthread_mutex_lock (&reslock);	1027	LOCK (reqlock);
		1028	LOCK (reslock);
753	#if !HAVE_PREADWRITE	1029	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);	1030	LOCK (preadwritelock);
755	#endif	1031	#endif
756	#if !HAVE_READDIR_R	1032	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);	1033	LOCK (readdirlock);
758	#endif	1034	#endif
759	}	1035	}
760		1036
761	static void atfork_parent (void)	1037	static void atfork_parent (void)
762	{	1038	{
763	#if !HAVE_READDIR_R	1039	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);	1040	UNLOCK (readdirlock);
765	#endif	1041	#endif
766	#if !HAVE_PREADWRITE	1042	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);	1043	UNLOCK (preadwritelock);
768	#endif	1044	#endif
769	pthread_mutex_unlock (&reslock);	1045	UNLOCK (reslock);
770	pthread_mutex_unlock (&reqlock);	1046	UNLOCK (reqlock);
		1047	UNLOCK (wrklock);
771	}	1048	}
772		1049
773	static void atfork_child (void)	1050	static void atfork_child (void)
774	{	1051	{
775	aio_req prv;	1052	aio_req prv;
776		1053
		1054	while (prv = reqq_shift (&req_queue))
		1055	req_free (prv);
		1056
		1057	while (prv = reqq_shift (&res_queue))
		1058	req_free (prv);
		1059
		1060	while (wrk_first.next != &wrk_first)
		1061	{
		1062	worker *wrk = wrk_first.next;
		1063
		1064	if (wrk->req)
		1065	req_free (wrk->req);
		1066
		1067	worker_clear (wrk);
		1068	worker_free (wrk);
		1069	}
		1070
777	started = 0;	1071	started = 0;
778		1072	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		1073
797	close (respipe [0]);	1074	close (respipe [0]);
798	close (respipe [1]);	1075	close (respipe [1]);
799	create_pipe ();	1076	create_pipe ();
800		1077
801	atfork_parent ();	1078	atfork_parent ();
802	}	1079	}
803		1080
804	#define dREQ \	1081	#define dREQ \
805	aio_req req; \	1082	aio_req req; \
		1083	int req_pri = next_pri; \
		1084	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	1085	\
807	if (SvOK (callback) && !SvROK (callback)) \	1086	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	1087	croak ("callback must be undef or of reference type"); \
809	\	1088	\
810	Newz (0, req, 1, aio_cb); \	1089	Newz (0, req, 1, aio_cb); \
811	if (!req) \	1090	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1091	croak ("out of memory during aio_req allocation"); \
813	\	1092	\
814	req->callback = newSVsv (callback)	1093	req->callback = newSVsv (callback); \
		1094	req->pri = req_pri
815		1095
816	#define REQ_SEND \	1096	#define REQ_SEND \
817	req_send (req); \	1097	req_send (req); \
818	\	1098	\
819	if (GIMME_V != G_VOID) \	1099	if (GIMME_V != G_VOID) \
…		…
833	create_pipe ();	1113	create_pipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1114	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}	1115	}
836		1116
837	void	1117	void
838	min_parallel (nthreads)	1118	min_parallel (int nthreads)
839	int nthreads
840	PROTOTYPE: $	1119	PROTOTYPE: $
841		1120
842	void	1121	void
843	max_parallel (nthreads)	1122	max_parallel (int nthreads)
844	int nthreads
845	PROTOTYPE: $	1123	PROTOTYPE: $
846		1124
847	int	1125	int
848	max_outstanding (nreqs)	1126	max_outstanding (int maxreqs)
849	int nreqs	1127	PROTOTYPE: $
850	PROTOTYPE: $
851	CODE:	1128	CODE:
852	RETVAL = max_outstanding;	1129	RETVAL = max_outstanding;
853	max_outstanding = nreqs;	1130	max_outstanding = maxreqs;
		1131	OUTPUT:
		1132	RETVAL
854		1133
855	void	1134	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1135	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
857	SV * pathname	1136	SV * pathname
858	int flags	1137	int flags
…		…
1073		1352
1074	REQ_SEND;	1353	REQ_SEND;
1075	}	1354	}
1076		1355
1077	void	1356	void
		1357	aio_busy (delay,callback=&PL_sv_undef)
		1358	double delay
		1359	SV * callback
		1360	PPCODE:
		1361	{
		1362	dREQ;
		1363
		1364	req->type = REQ_BUSY;
		1365	req->fd = delay < 0. ? 0 : delay;
		1366	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1367
		1368	REQ_SEND;
		1369	}
		1370
		1371	void
1078	aio_group (callback=&PL_sv_undef)	1372	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1373	SV * callback
1080	PROTOTYPE: ;&	1374	PROTOTYPE: ;$
1081	PPCODE:	1375	PPCODE:
1082	{	1376	{
1083	dREQ;	1377	dREQ;
		1378
1084	req->type = REQ_GROUP;	1379	req->type = REQ_GROUP;
		1380	req_send (req);
		1381
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1382	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1383	}
		1384
		1385	void
		1386	aio_nop (callback=&PL_sv_undef)
		1387	SV * callback
		1388	PPCODE:
		1389	{
		1390	dREQ;
		1391
		1392	req->type = REQ_NOP;
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aioreq_pri (int pri = DEFAULT_PRI)
		1399	CODE:
		1400	if (pri < PRI_MIN) pri = PRI_MIN;
		1401	if (pri > PRI_MAX) pri = PRI_MAX;
		1402	next_pri = pri + PRI_BIAS;
		1403
		1404	void
		1405	aioreq_nice (int nice = 0)
		1406	CODE:
		1407	nice = next_pri - nice;
		1408	if (nice < PRI_MIN) nice = PRI_MIN;
		1409	if (nice > PRI_MAX) nice = PRI_MAX;
		1410	next_pri = nice + PRI_BIAS;
1087		1411
1088	void	1412	void
1089	flush ()	1413	flush ()
1090	PROTOTYPE:	1414	PROTOTYPE:
1091	CODE:	1415	CODE:
1092	while (nreqs)	1416	while (nreqs)
1093	{	1417	{
1094	poll_wait ();	1418	poll_wait ();
1095	poll_cb ();	1419	poll_cb (0);
1096	}	1420	}
1097		1421
1098	void	1422	void
1099	poll()	1423	poll()
1100	PROTOTYPE:	1424	PROTOTYPE:
1101	CODE:	1425	CODE:
1102	if (nreqs)	1426	if (nreqs)
1103	{	1427	{
1104	poll_wait ();	1428	poll_wait ();
1105	poll_cb ();	1429	poll_cb (0);
1106	}	1430	}
1107		1431
1108	int	1432	int
1109	poll_fileno()	1433	poll_fileno()
1110	PROTOTYPE:	1434	PROTOTYPE:
…		…
1115		1439
1116	int	1440	int
1117	poll_cb(...)	1441	poll_cb(...)
1118	PROTOTYPE:	1442	PROTOTYPE:
1119	CODE:	1443	CODE:
1120	RETVAL = poll_cb ();	1444	RETVAL = poll_cb (0);
		1445	OUTPUT:
		1446	RETVAL
		1447
		1448	int
		1449	poll_some(int max = 0)
		1450	PROTOTYPE: $
		1451	CODE:
		1452	RETVAL = poll_cb (max);
1121	OUTPUT:	1453	OUTPUT:
1122	RETVAL	1454	RETVAL
1123		1455
1124	void	1456	void
1125	poll_wait()	1457	poll_wait()
…		…
1134	CODE:	1466	CODE:
1135	RETVAL = nreqs;	1467	RETVAL = nreqs;
1136	OUTPUT:	1468	OUTPUT:
1137	RETVAL	1469	RETVAL
1138		1470
		1471	PROTOTYPES: DISABLE
		1472
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1473	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1474
1141	void	1475	void
1142	cancel (aio_req_ornot req)	1476	cancel (aio_req_ornot req)
1143	PROTOTYPE:
1144	CODE:	1477	CODE:
1145	req->cancelled = 1;	1478	req_cancel (req);
1146		1479
		1480	void
		1481	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1482	CODE:
		1483	SvREFCNT_dec (req->callback);
		1484	req->callback = newSVsv (callback);
		1485
		1486	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1487
		1488	void
		1489	add (aio_req grp, ...)
		1490	PPCODE:
		1491	{
		1492	int i;
		1493	aio_req req;
		1494
		1495	if (grp->fd == 2)
		1496	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1497
		1498	for (i = 1; i < items; ++i )
		1499	{
		1500	if (GIMME_V != G_VOID)
		1501	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1502
		1503	req = SvAIO_REQ (ST (i));
		1504
		1505	if (req)
		1506	{
		1507	++grp->length;
		1508	req->grp = grp;
		1509
		1510	req->grp_prev = 0;
		1511	req->grp_next = grp->grp_first;
		1512
		1513	if (grp->grp_first)
		1514	grp->grp_first->grp_prev = req;
		1515
		1516	grp->grp_first = req;
		1517	}
		1518	}
		1519	}
		1520
		1521	void
		1522	cancel_subs (aio_req_ornot req)
		1523	CODE:
		1524	req_cancel_subs (req);
		1525
		1526	void
		1527	result (aio_req grp, ...)
		1528	CODE:
		1529	{
		1530	int i;
		1531	AV *av = newAV ();
		1532
		1533	for (i = 1; i < items; ++i )
		1534	av_push (av, newSVsv (ST (i)));
		1535
		1536	SvREFCNT_dec (grp->data);
		1537	grp->data = (SV *)av;
		1538	}
		1539
		1540	void
		1541	limit (aio_req grp, int limit)
		1542	CODE:
		1543	grp->fd2 = limit;
		1544	aio_grp_feed (grp);
		1545
		1546	void
		1547	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1548	CODE:
		1549	{
		1550	SvREFCNT_dec (grp->fh2);
		1551	grp->fh2 = newSVsv (callback);
		1552
		1553	if (grp->fd2 <= 0)
		1554	grp->fd2 = 2;
		1555
		1556	aio_grp_feed (grp);
		1557	}
		1558

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