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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs.
Revision 1.79 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"
…		…
39	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	49	#ifndef NAME_MAX
41	# define NAME_MAX 4096	50	# define NAME_MAX 4096
42	#endif	51	#endif
43		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
44	#if __ia64	58	#if __ia64
45	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	62	#else
47	# define STACKSIZE 8192	63	# define STACKSIZE 16384
48	#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;
49		88
50	enum {	89	enum {
51	REQ_QUIT,	90	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	97	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	99	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	100	REQ_BUSY,
62	};	101	};
63		102
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		105
67	typedef struct aio_cb	106	typedef struct aio_cb
68	{	107	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
72
73	SV *self; /* the perl counterpart of this request, if any */
74		109
75	SV *data, *callback;	110	SV *data, *callback;
76	SV *fh, *fh2;	111	SV *fh, *fh2;
77	void *dataptr, *data2ptr;	112	void *dataptr, *data2ptr;
78	Stat_t *statdata;	113	Stat_t *statdata;
79	off_t offset;	114	off_t offset;
80	size_t length;	115	size_t length;
81	ssize_t result;	116	ssize_t result;
82		117
		118	STRLEN dataoffset;
83	int type;	119	int type;
84	int fd, fd2;	120	int fd, fd2;
85	int errorno;	121	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	122	mode_t mode; /* open */
		123
88	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;
89	} aio_cb;	129	} aio_cb;
		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
90		134
91	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
93	typedef aio_cb *aio_group;
94		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
95	static int started, wanted;	149	static unsigned int started, wanted;
96	static volatile int nreqs;	150	static volatile unsigned int nreqs, nready, npending;
97	static int max_outstanding = 1<<30;	151	static volatile unsigned int max_outstanding = 0xffffffff;
98	static int respipe [2];	152	static int respipe [2];
99		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
100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	203	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	205	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
103		206
104	static volatile aio_req reqs, reqe; /* queue start, queue end */	207	/*
105	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;
106		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);
107	static void req_free (aio_req req);	263	static void req_free (aio_req req);
		264	static void req_cancel (aio_req req);
108		265
109	/* must be called at most once */	266	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	267	static SV *req_sv (aio_req req, const char *klass)
111	{	268	{
		269	if (!req->self)
		270	{
112	req->self = (SV *)newHV ();	271	req->self = (SV *)newHV ();
113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	272	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		273	}
114		274
115	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	275	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
116	}	276	}
117		277
118	static aio_req SvAIO_REQ (SV *sv)	278	static aio_req SvAIO_REQ (SV *sv)
119	{	279	{
		280	MAGIC *mg;
		281
120	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	282	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121	croak ("object of class " AIO_REQ_KLASS " expected");	283	croak ("object of class " AIO_REQ_KLASS " expected");
122		284
123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	285	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124		286
125	return mg ? (aio_req)mg->mg_ptr : 0;	287	return mg ? (aio_req)mg->mg_ptr : 0;
126	}	288	}
127		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
128	static void poll_wait ()	336	static void poll_wait ()
129	{	337	{
130	if (nreqs && !ress)
131	{
132	fd_set rfd;	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
133	FD_ZERO(&rfd);	350	FD_ZERO(&rfd);
134	FD_SET(respipe [0], &rfd);	351	FD_SET(respipe [0], &rfd);
135		352
136	select (respipe [0] + 1, &rfd, 0, 0, 0);	353	select (respipe [0] + 1, &rfd, 0, 0, 0);
137	}	354	}
138	}	355	}
139		356
140	static void req_invoke (aio_req req)	357	static void req_invoke (aio_req req)
141	{	358	{
142	dSP;	359	dSP;
143	int errorno = errno;
144		360
145	if (req->cancelled || !SvOK (req->callback))	361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
146	return;	362	{
147
148	errno = req->errorno;
149
150	ENTER;	363	ENTER;
		364	SAVETMPS;
151	PUSHMARK (SP);	365	PUSHMARK (SP);
		366	EXTEND (SP, 1);
152		367
153	switch (req->type)	368	switch (req->type)
154	{
155	case REQ_READDIR:
156	{	369	{
157	SV *rv = &PL_sv_undef;	370	case REQ_READDIR:
158
159	if (req->result >= 0)
160	{	371	{
161	char *buf = req->data2ptr;	372	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		373
164	while (req->result)	374	if (req->result >= 0)
165	{	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	{
166	SV *sv = newSVpv (buf, 0);	384	SV *sv = newSVpv (buf, 0);
167		385
168	av_push (av, sv);	386	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	387	buf += SvCUR (sv) + 1;
170	req->result--;	388	}
		389
		390	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	391	}
172		392
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	393	PUSHs (rv);
174	}	394	}
		395	break;
175		396
176	XPUSHs (rv);	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;
177	}	435	}
178	break;
179		436
180	case REQ_OPEN:	437	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		438
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	439	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
188	SPAGAIN;
189
190	fh = SvREFCNT_inc (POPs);
191
192	PUSHMARK (SP);
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_SLEEP:
198	case REQ_GROUP:
199	break;
200
201	default:
202	XPUSHs (sv_2mortal (newSViv (req->result)));
203	break;
204	}
205
206
207	PUTBACK;
208	call_sv (req->callback, G_VOID | G_EVAL);	440	call_sv (req->callback, G_VOID | G_EVAL);
209	SPAGAIN;	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	}
210		460
211	if (SvTRUE (ERRSV))	461	if (SvTRUE (ERRSV))
212	{	462	{
213	req_free (req);	463	req_free (req);
214	croak (0);	464	croak (0);
215	}	465	}
216
217	LEAVE;
218
219	errno = errorno;
220	}	466	}
221		467
222	static void req_free (aio_req req)	468	static void req_free (aio_req req)
223	{	469	{
224	if (req->grp)
225	{
226	aio_req grp = req->grp;
227
228	/* unlink request */
229	req->grp_next->grp_prev = req->grp_prev;
230	req->grp_prev->grp_next = req->grp_next;
231
232	if (grp->grp_next == grp)
233	{
234	req_invoke (grp);
235	req_free (grp);
236	}
237	}
238
239	if (req->self)	470	if (req->self)
240	{	471	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);	472	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);	473	SvREFCNT_dec (req->self);
243	}	474	}
244		475
245	if (req->data)
246	SvREFCNT_dec (req->data);	476	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);	477	SvREFCNT_dec (req->fh);
250
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);	478	SvREFCNT_dec (req->fh2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);	479	SvREFCNT_dec (req->callback);
		480	Safefree (req->statdata);
259		481
260	if (req->type == REQ_READDIR && req->result >= 0)	482	if (req->type == REQ_READDIR)
261	free (req->data2ptr);	483	free (req->data2ptr);
262		484
263	Safefree (req);	485	Safefree (req);
264	}	486	}
265		487
		488	static void req_cancel_subs (aio_req grp)
		489	{
		490	aio_req sub;
		491
		492	if (grp->type != REQ_GROUP)
		493	return;
		494
		495	SvREFCNT_dec (grp->fh2);
		496	grp->fh2 = 0;
		497
		498	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		499	req_cancel (sub);
		500	}
		501
266	static void req_cancel (aio_req req)	502	static void req_cancel (aio_req req)
267	{	503	{
268	req->cancelled = 1;	504	req->flags |= FLAG_CANCELLED;
269		505
270	if (req->type == REQ_GROUP)	506	req_cancel_subs (req);
271	{
272	aio_req sub;
273
274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
275	req_cancel (sub);
276	}
277	}	507	}
278		508
279	static int poll_cb ()	509	static int poll_cb (int max)
280	{	510	{
281	dSP;	511	dSP;
282	int count = 0;	512	int count = 0;
283	int do_croak = 0;	513	int do_croak = 0;
284	aio_req req;	514	aio_req req;
285		515
286	for (;;)	516	for (;;)
287	{	517	{
288	pthread_mutex_lock (&reslock);	518	while (max <= 0 || count < max)
289	req = ress;
290
291	if (req)
292	{	519	{
293	ress = req->next;	520	LOCK (reslock);
		521	req = reqq_shift (&res_queue);
294		522
295	if (!ress)	523	if (req)
296	{	524	{
		525	--npending;
		526
		527	if (!res_queue.size)
		528	{
297	/* read any signals sent by the worker threads */	529	/* read any signals sent by the worker threads */
298	char buf [32];	530	char buf [32];
299	while (read (respipe [0], buf, 32) == 32)	531	while (read (respipe [0], buf, 32) == 32)
		532	;
300	;	533	}
301
302	rese = 0;
303	}	534	}
		535
		536	UNLOCK (reslock);
		537
		538	if (!req)
		539	break;
		540
		541	--nreqs;
		542
		543	if (req->type == REQ_QUIT)
		544	--started;
		545	else if (req->type == REQ_GROUP && req->length)
		546	{
		547	req->fd = 1; /* mark request as delayed */
		548	continue;
		549	}
		550	else
		551	{
		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)
		559	{
		560	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		561	PL_laststatval = req->result;
		562	PL_statcache = *(req->statdata);
		563	}
		564
		565	req_invoke (req);
		566
		567	count++;
		568	}
		569
		570	req_free (req);
304	}	571	}
305		572
306	pthread_mutex_unlock (&reslock);	573	if (nreqs <= max_outstanding)
307
308	if (!req)
309	break;	574	break;
310		575
311	nreqs--;	576	poll_wait ();
312		577
313	if (req->type == REQ_QUIT)	578	max = 0;
314	started--;
315	else if (req->type == REQ_GROUP && req->grp_next != req)
316	continue;
317	else
318	{
319	if (req->type == REQ_READ)
320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
321
322	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323	SvREADONLY_off (req->data);
324
325	if (req->statdata)
326	{
327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
328	PL_laststatval = req->result;
329	PL_statcache = *(req->statdata);
330	}
331
332	req_invoke (req);
333
334	count++;
335	}
336
337	req_free (req);
338	}	579	}
339		580
340	return count;	581	return count;
341	}	582	}
342		583
343	static void *aio_proc(void *arg);	584	static void *aio_proc(void *arg);
344		585
345	static void start_thread (void)	586	static void start_thread (void)
346	{	587	{
347	sigset_t fullsigset, oldsigset;	588	sigset_t fullsigset, oldsigset;
348	pthread_t tid;
349	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");
350		595
351	pthread_attr_init (&attr);	596	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);	597	pthread_attr_setstacksize (&attr, STACKSIZE);
353	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
354		599
355	sigfillset (&fullsigset);	600	sigfillset (&fullsigset);
		601
		602	LOCK (wrklock);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357		604
358	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;
359	started++;	611	++started;
		612	}
		613	else
		614	free (wrk);
360		615
361	sigprocmask (SIG_SETMASK, &oldsigset, 0);	616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		617	UNLOCK (wrklock);
362	}	618	}
363		619
364	static void req_send (aio_req req)	620	static void req_send (aio_req req)
365	{	621	{
366	while (started < wanted && nreqs >= started)	622	while (started < wanted && nreqs >= started)
367	start_thread ();	623	start_thread ();
368		624
369	nreqs++;	625	++nreqs;
370		626
371	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
372		628	++nready;
373	req->next = 0;	629	reqq_push (&req_queue, req);
374
375	if (reqe)
376	{
377	reqe->next = req;
378	reqe = req;
379	}
380	else
381	reqe = reqs = req;
382
383	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
385
386	if (nreqs > max_outstanding)
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}	632	}
397		633
398	static void end_thread (void)	634	static void end_thread (void)
399	{	635	{
400	aio_req req;	636	aio_req req;
		637
401	Newz (0, req, 1, aio_cb);	638	Newz (0, req, 1, aio_cb);
		639
402	req->type = REQ_QUIT;	640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
403		642
404	req_send (req);	643	req_send (req);
405	}	644	}
406		645
407	static void min_parallel (int nthreads)	646	static void min_parallel (int nthreads)
…		…
424	}	663	}
425		664
426	while (started > wanted)	665	while (started > wanted)
427	{	666	{
428	poll_wait ();	667	poll_wait ();
429	poll_cb ();	668	poll_cb (0);
430	}	669	}
431	}	670	}
432		671
433	static void create_pipe ()	672	static void create_pipe ()
434	{	673	{
…		…
459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	698	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460	{	699	{
461	ssize_t res;	700	ssize_t res;
462	off_t ooffset;	701	off_t ooffset;
463		702
464	pthread_mutex_lock (&preadwritelock);	703	LOCK (preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);	704	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);	705	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);	706	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);	707	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);	708	UNLOCK (preadwritelock);
470		709
471	return res;	710	return res;
472	}	711	}
473		712
474	static ssize_t 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)
475	{	714	{
476	ssize_t res;	715	ssize_t res;
477	off_t ooffset;	716	off_t ooffset;
478		717
479	pthread_mutex_lock (&preadwritelock);	718	LOCK (preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);	719	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);	720	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);	721	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);	722	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);	723	UNLOCK (preadwritelock);
485		724
486	return res;	725	return res;
487	}	726	}
488	#endif	727	#endif
489		728
490	#if !HAVE_FDATASYNC	729	#if !HAVE_FDATASYNC
491	# define fdatasync fsync	730	# define fdatasync fsync
492	#endif	731	#endif
493		732
494	#if !HAVE_READAHEAD	733	#if !HAVE_READAHEAD
495	# define readahead aio_readahead	734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
496		735
497	static ssize_t readahead (int fd, off_t offset, size_t count)	736	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
498	{	737	{
499	char readahead_buf[4096];	738	dBUF;
500		739
501	while (count > 0)	740	while (count > 0)
502	{	741	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
504		743
505	pread (fd, readahead_buf, len, offset);	744	pread (fd, aio_buf, len, offset);
506	offset += len;	745	offset += len;
507	count -= len;	746	count -= len;
508	}	747	}
509		748
510	errno = 0;	749	errno = 0;
511	}	750	}
		751
512	#endif	752	#endif
513		753
514	#if !HAVE_READDIR_R	754	#if !HAVE_READDIR_R
515	# define readdir_r aio_readdir_r	755	# define readdir_r aio_readdir_r
516		756
…		…
519	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	759	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520	{	760	{
521	struct dirent *e;	761	struct dirent *e;
522	int errorno;	762	int errorno;
523		763
524	pthread_mutex_lock (&readdirlock);	764	LOCK (readdirlock);
525		765
526	e = readdir (dirp);	766	e = readdir (dirp);
527	errorno = errno;	767	errorno = errno;
528		768
529	if (e)	769	if (e)
…		…
532	strcpy (ent->d_name, e->d_name);	772	strcpy (ent->d_name, e->d_name);
533	}	773	}
534	else	774	else
535	*res = 0;	775	*res = 0;
536		776
537	pthread_mutex_unlock (&readdirlock);	777	UNLOCK (readdirlock);
538		778
539	errno = errorno;	779	errno = errorno;
540	return e ? 0 : -1;	780	return e ? 0 : -1;
541	}	781	}
542	#endif	782	#endif
543		783
544	/* sendfile always needs emulation */	784	/* sendfile always needs emulation */
545	static ssize_t 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)
546	{	786	{
547	ssize_t res;	787	ssize_t res;
548		788
549	if (!count)	789	if (!count)
550	return 0;	790	return 0;
…		…
561	{	801	{
562	off_t sbytes;	802	off_t sbytes;
563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564		804
565	if (res < 0 && sbytes)	805	if (res < 0 && sbytes)
566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
567	res = sbytes;	807	res = sbytes;
568	}	808	}
569		809
570	# elif __hpux	810	# elif __hpux
571	res = sendfile (ofd, ifd, offset, count, 0, 0);	811	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
599	#endif	839	#endif
600	)	840	)
601	)	841	)
602	{	842	{
603	/* emulate sendfile. this is a major pain in the ass */	843	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];	844	dBUF;
		845
605	res = 0;	846	res = 0;
606		847
607	while (count)	848	while (count)
608	{	849	{
609	ssize_t cnt;	850	ssize_t cnt;
610		851
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
612		853
613	if (cnt <= 0)	854	if (cnt <= 0)
614	{	855	{
615	if (cnt && !res) res = -1;	856	if (cnt && !res) res = -1;
616	break;	857	break;
617	}	858	}
618		859
619	cnt = write (ofd, buf, cnt);	860	cnt = write (ofd, aio_buf, cnt);
620		861
621	if (cnt <= 0)	862	if (cnt <= 0)
622	{	863	{
623	if (cnt && !res) res = -1;	864	if (cnt && !res) res = -1;
624	break;	865	break;
…		…
632		873
633	return res;	874	return res;
634	}	875	}
635		876
636	/* read a full directory */	877	/* read a full directory */
637	static int scandir_ (const char *path, void **namesp)	878	static void scandir_ (aio_req req, worker *self)
638	{	879	{
639	DIR *dirp = opendir (path);	880	DIR *dirp;
640	union	881	union
641	{	882	{
642	struct dirent d;	883	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;	885	} *u;
645	struct dirent *entp;	886	struct dirent *entp;
646	char *name, *names;	887	char *name, *names;
647	int memlen = 4096;	888	int memlen = 4096;
648	int memofs = 0;	889	int memofs = 0;
649	int res = 0;	890	int res = 0;
650	int errorno;	891	int errorno;
651		892
652	if (!dirp)	893	LOCK (wrklock);
653	return -1;	894	self->dirp = dirp = opendir (req->dataptr);
654		895	self->dbuf = u = malloc (sizeof (*u));
655	names = malloc (memlen);	896	req->data2ptr = names = malloc (memlen);
		897	UNLOCK (wrklock);
656		898
		899	if (dirp && u && names)
657	for (;;)	900	for (;;)
658	{	901	{
		902	errno = 0;
659	errno = 0, readdir_r (dirp, &u.d, &entp);	903	readdir_r (dirp, &u->d, &entp);
660		904
661	if (!entp)	905	if (!entp)
662	break;	906	break;
663		907
664	name = entp->d_name;	908	name = entp->d_name;
665		909
666	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667	{	911	{
668	int len = strlen (name) + 1;	912	int len = strlen (name) + 1;
669		913
670	res++;	914	res++;
671		915
672	while (memofs + len > memlen)	916	while (memofs + len > memlen)
673	{	917	{
674	memlen *= 2;	918	memlen *= 2;
		919	LOCK (wrklock);
675	names = realloc (names, memlen);	920	req->data2ptr = names = realloc (names, memlen);
		921	UNLOCK (wrklock);
		922
676	if (!names)	923	if (!names)
677	break;	924	break;
678	}	925	}
679		926
680	memcpy (names + memofs, name, len);	927	memcpy (names + memofs, name, len);
681	memofs += len;	928	memofs += len;
682	}	929	}
683	}	930	}
684		931
685	errorno = errno;
686	closedir (dirp);
687
688	if (errorno)	932	if (errno)
689	{
690	free (names);
691	errno = errorno;
692	res = -1;	933	res = -1;
693	}	934
694		935	req->result = res;
695	*namesp = (void *)names;
696	return res;
697	}	936	}
698		937
699	/*****************************************************************************/	938	/*****************************************************************************/
700		939
701	static void *aio_proc (void *thr_arg)	940	static void *aio_proc (void *thr_arg)
702	{	941	{
703	aio_req req;	942	aio_req req;
704	int type;	943	int type;
		944	worker *self = (worker *)thr_arg;
705		945
706	do	946	do
707	{	947	{
708	pthread_mutex_lock (&reqlock);	948	LOCK (reqlock);
709		949
710	for (;;)	950	for (;;)
711	{	951	{
712	req = reqs;	952	self->req = req = reqq_shift (&req_queue);
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719		953
720	if (req)	954	if (req)
721	break;	955	break;
722		956
723	pthread_cond_wait (&reqwait, &reqlock);	957	pthread_cond_wait (&reqwait, &reqlock);
724	}	958	}
725		959
726	pthread_mutex_unlock (&reqlock);	960	--nready;
		961
		962	UNLOCK (reqlock);
727		963
728	errno = 0; /* strictly unnecessary */	964	errno = 0; /* strictly unnecessary */
		965	type = req->type; /* remember type for QUIT check */
729		966
730	if (!req->cancelled)	967	if (!(req->flags & FLAG_CANCELLED))
731	switch (req->type)	968	switch (type)
732	{	969	{
733	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;
734	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;
735		972
736	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;
737	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;
738		975
739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
742		979
…		…
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
750		987
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;	989	case REQ_FSYNC: req->result = fsync (req->fd); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	990	case REQ_READDIR: scandir_ (req, self); break;
754		991
755	case REQ_SLEEP:	992	case REQ_BUSY:
756	{	993	{
757	struct timeval tv;	994	struct timeval tv;
758		995
759	tv.tv_sec = req->fd;	996	tv.tv_sec = req->fd;
760	tv.tv_usec = req->fd2;	997	tv.tv_usec = req->fd2;
761		998
762	req->result = select (0, 0, 0, 0, &tv);	999	req->result = select (0, 0, 0, 0, &tv);
763	}	1000	}
764		1001
		1002	case REQ_GROUP:
		1003	case REQ_NOP:
765	case REQ_QUIT:	1004	case REQ_QUIT:
766	break;	1005	break;
767		1006
768	default:	1007	default:
769	req->result = ENOSYS;	1008	req->result = ENOSYS;
770	break;	1009	break;
771	}	1010	}
772		1011
773	req->errorno = errno;	1012	req->errorno = errno;
774		1013
775	pthread_mutex_lock (&reslock);	1014	LOCK (reslock);
776		1015
777	req->next = 0;	1016	++npending;
778		1017
779	if (rese)	1018	if (!reqq_push (&res_queue, req))
780	{
781	rese->next = req;
782	rese = req;
783	}
784	else
785	{
786	rese = ress = req;
787
788	/* write a dummy byte to the pipe so fh becomes ready */	1019	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);	1020	write (respipe [1], &respipe, 1);
790	}
791		1021
792	pthread_mutex_unlock (&reslock);	1022	self->req = 0;
		1023	worker_clear (self);
		1024
		1025	UNLOCK (reslock);
793	}	1026	}
794	while (type != REQ_QUIT);	1027	while (type != REQ_QUIT);
795		1028
		1029	LOCK (wrklock);
		1030	worker_free (self);
		1031	UNLOCK (wrklock);
		1032
796	return 0;	1033	return 0;
797	}	1034	}
798		1035
799	/*****************************************************************************/	1036	/*****************************************************************************/
800		1037
801	static void atfork_prepare (void)	1038	static void atfork_prepare (void)
802	{	1039	{
803	pthread_mutex_lock (&reqlock);	1040	LOCK (wrklock);
804	pthread_mutex_lock (&reslock);	1041	LOCK (reqlock);
		1042	LOCK (reslock);
805	#if !HAVE_PREADWRITE	1043	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);	1044	LOCK (preadwritelock);
807	#endif	1045	#endif
808	#if !HAVE_READDIR_R	1046	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);	1047	LOCK (readdirlock);
810	#endif	1048	#endif
811	}	1049	}
812		1050
813	static void atfork_parent (void)	1051	static void atfork_parent (void)
814	{	1052	{
815	#if !HAVE_READDIR_R	1053	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);	1054	UNLOCK (readdirlock);
817	#endif	1055	#endif
818	#if !HAVE_PREADWRITE	1056	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);	1057	UNLOCK (preadwritelock);
820	#endif	1058	#endif
821	pthread_mutex_unlock (&reslock);	1059	UNLOCK (reslock);
822	pthread_mutex_unlock (&reqlock);	1060	UNLOCK (reqlock);
		1061	UNLOCK (wrklock);
823	}	1062	}
824		1063
825	static void atfork_child (void)	1064	static void atfork_child (void)
826	{	1065	{
827	aio_req prv;	1066	aio_req prv;
828		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
829	started = 0;	1085	started = 0;
830		1086	nreqs = 0;
831	while (reqs)
832	{
833	prv = reqs;
834	reqs = prv->next;
835	req_free (prv);
836	}
837
838	reqs = reqe = 0;
839
840	while (ress)
841	{
842	prv = ress;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848		1087
849	close (respipe [0]);	1088	close (respipe [0]);
850	close (respipe [1]);	1089	close (respipe [1]);
851	create_pipe ();	1090	create_pipe ();
852		1091
853	atfork_parent ();	1092	atfork_parent ();
854	}	1093	}
855		1094
856	#define dREQ \	1095	#define dREQ \
857	aio_req req; \	1096	aio_req req; \
		1097	int req_pri = next_pri; \
		1098	next_pri = DEFAULT_PRI + PRI_BIAS; \
858	\	1099	\
859	if (SvOK (callback) && !SvROK (callback)) \	1100	if (SvOK (callback) && !SvROK (callback)) \
860	croak ("callback must be undef or of reference type"); \	1101	croak ("callback must be undef or of reference type"); \
861	\	1102	\
862	Newz (0, req, 1, aio_cb); \	1103	Newz (0, req, 1, aio_cb); \
863	if (!req) \	1104	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	1105	croak ("out of memory during aio_req allocation"); \
865	\	1106	\
866	req->callback = newSVsv (callback)	1107	req->callback = newSVsv (callback); \
		1108	req->pri = req_pri
867		1109
868	#define REQ_SEND \	1110	#define REQ_SEND \
869	req_send (req); \	1111	req_send (req); \
870	\	1112	\
871	if (GIMME_V != G_VOID) \	1113	if (GIMME_V != G_VOID) \
…		…
885	create_pipe ();	1127	create_pipe ();
886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
887	}	1129	}
888		1130
889	void	1131	void
890	min_parallel (nthreads)	1132	min_parallel (int nthreads)
891	int nthreads
892	PROTOTYPE: $	1133	PROTOTYPE: $
893		1134
894	void	1135	void
895	max_parallel (nthreads)	1136	max_parallel (int nthreads)
896	int nthreads
897	PROTOTYPE: $	1137	PROTOTYPE: $
898		1138
899	int	1139	int
900	max_outstanding (nreqs)	1140	max_outstanding (int maxreqs)
901	int nreqs	1141	PROTOTYPE: $
902	PROTOTYPE: $
903	CODE:	1142	CODE:
904	RETVAL = max_outstanding;	1143	RETVAL = max_outstanding;
905	max_outstanding = nreqs;	1144	max_outstanding = maxreqs;
		1145	OUTPUT:
		1146	RETVAL
906		1147
907	void	1148	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
909	SV * pathname	1150	SV * pathname
910	int flags	1151	int flags
…		…
1125		1366
1126	REQ_SEND;	1367	REQ_SEND;
1127	}	1368	}
1128		1369
1129	void	1370	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	1371	aio_busy (delay,callback=&PL_sv_undef)
1131	double delay	1372	double delay
1132	SV * callback	1373	SV * callback
1133	PPCODE:	1374	PPCODE:
1134	{	1375	{
1135	dREQ;	1376	dREQ;
1136		1377
1137	req->type = REQ_SLEEP;	1378	req->type = REQ_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	1379	req->fd = delay < 0. ? 0 : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140		1381
1141	REQ_SEND;	1382	REQ_SEND;
1142	}	1383	}
1143		1384
1144	void	1385	void
1145	aio_group (callback=&PL_sv_undef)	1386	aio_group (callback=&PL_sv_undef)
1146	SV * callback	1387	SV * callback
1147	PROTOTYPE: ;&	1388	PROTOTYPE: ;$
1148	PPCODE:	1389	PPCODE:
1149	{	1390	{
1150	dREQ;	1391	dREQ;
		1392
1151	req->type = REQ_GROUP;	1393	req->type = REQ_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154
1155	req_send (req);	1394	req_send (req);
		1395
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	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;
1158		1432
1159	void	1433	void
1160	flush ()	1434	flush ()
1161	PROTOTYPE:	1435	PROTOTYPE:
1162	CODE:	1436	CODE:
1163	while (nreqs)	1437	while (nreqs)
1164	{	1438	{
1165	poll_wait ();	1439	poll_wait ();
1166	poll_cb ();	1440	poll_cb (0);
1167	}	1441	}
1168		1442
1169	void	1443	void
1170	poll()	1444	poll()
1171	PROTOTYPE:	1445	PROTOTYPE:
1172	CODE:	1446	CODE:
1173	if (nreqs)	1447	if (nreqs)
1174	{	1448	{
1175	poll_wait ();	1449	poll_wait ();
1176	poll_cb ();	1450	poll_cb (0);
1177	}	1451	}
1178		1452
1179	int	1453	int
1180	poll_fileno()	1454	poll_fileno()
1181	PROTOTYPE:	1455	PROTOTYPE:
…		…
1186		1460
1187	int	1461	int
1188	poll_cb(...)	1462	poll_cb(...)
1189	PROTOTYPE:	1463	PROTOTYPE:
1190	CODE:	1464	CODE:
1191	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);
1192	OUTPUT:	1474	OUTPUT:
1193	RETVAL	1475	RETVAL
1194		1476
1195	void	1477	void
1196	poll_wait()	1478	poll_wait()
…		…
1205	CODE:	1487	CODE:
1206	RETVAL = nreqs;	1488	RETVAL = nreqs;
1207	OUTPUT:	1489	OUTPUT:
1208	RETVAL	1490	RETVAL
1209		1491
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1492	int
1211		1493	nready()
1212	void
1213	cancel (aio_req_ornot req)
1214	PROTOTYPE:	1494	PROTOTYPE:
1215	CODE:	1495	CODE:
		1496	if (WORDREAD_UNSAFE) LOCK (reqlock);
		1497	RETVAL = nready;
		1498	if (WORDREAD_UNSAFE) UNLOCK (reqlock);
		1499	OUTPUT:
		1500	RETVAL
		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:
1216	req_cancel (req);	1519	req_cancel (req);
1217		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
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1528
1220	void	1529	void
1221	add (aio_req grp, ...)	1530	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1531	PPCODE:
1224	{	1532	{
1225	int i;	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");
1226		1538
1227	for (i = 1; i < items; ++i )	1539	for (i = 1; i < items; ++i )
1228	{	1540	{
1229	aio_req req = SvAIO_REQ (ST (i));
1230
1231	req->grp_prev = grp;
1232	req->grp_next = grp->grp_next;
1233	grp->grp_next->grp_prev = req;
1234	grp->grp_next = req;
1235
1236	req->grp = grp;
1237
1238	if (GIMME_V != G_VOID)	1541	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	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	}
1240	}	1559	}
1241	}	1560	}
1242		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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