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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.47 by root, Sun Oct 22 10:10:23 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		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
94	static int started, wanted;	149	static unsigned int started, wanted;
95	static volatile int nreqs;	150	static volatile unsigned int nreqs, nready, npending;
96	static int max_outstanding = 1<<30;	151	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	152	static int respipe [2];
98		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
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	203	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	205	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		206
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	207	/*
104	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;
105		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);
106	static void req_free (aio_req req);	263	static void req_free (aio_req req);
		264	static void req_cancel (aio_req req);
107		265
108	/* must be called at most once */	266	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	267	static SV *req_sv (aio_req req, const char *klass)
110	{	268	{
		269	if (!req->self)
		270	{
111	req->self = (SV *)newHV ();	271	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	272	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		273	}
113		274
114	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)));
115	}	276	}
116		277
117	static aio_req SvAIO_REQ (SV *sv)	278	static aio_req SvAIO_REQ (SV *sv)
118	{	279	{
		280	MAGIC *mg;
		281
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	282	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	283	croak ("object of class " AIO_REQ_KLASS " expected");
121		284
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	285	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		286
124	return mg ? (aio_req)mg->mg_ptr : 0;	287	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	288	}
126		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
127	static void poll_wait ()	336	static void poll_wait ()
128	{	337	{
129	if (nreqs && !ress)
130	{
131	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
132	FD_ZERO(&rfd);	350	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);	351	FD_SET(respipe [0], &rfd);
134		352
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	353	select (respipe [0] + 1, &rfd, 0, 0, 0);
136	}	354	}
137	}	355	}
138		356
139	static void req_invoke (aio_req req)	357	static void req_invoke (aio_req req)
140	{	358	{
141	dSP;	359	dSP;
142	int errorno = errno;
143		360
144	if (req->cancelled || !SvOK (req->callback))	361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
145	return;	362	{
146
147	errno = req->errorno;
148
149	ENTER;	363	ENTER;
		364	SAVETMPS;
150	PUSHMARK (SP);	365	PUSHMARK (SP);
		366	EXTEND (SP, 1);
151		367
152	switch (req->type)	368	switch (req->type)
153	{
154	case REQ_READDIR:
155	{	369	{
156	SV *rv = &PL_sv_undef;	370	case REQ_READDIR:
157
158	if (req->result >= 0)
159	{	371	{
160	char *buf = req->data2ptr;	372	SV *rv = &PL_sv_undef;
161	AV *av = newAV ();
162		373
163	while (req->result)	374	if (req->result >= 0)
164	{	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	{
165	SV *sv = newSVpv (buf, 0);	384	SV *sv = newSVpv (buf, 0);
166		385
167	av_push (av, sv);	386	av_store (av, i, sv);
168	buf += SvCUR (sv) + 1;	387	buf += SvCUR (sv) + 1;
169	req->result--;	388	}
		389
		390	rv = sv_2mortal (newRV_noinc ((SV *)av));
170	}	391	}
171		392
172	rv = sv_2mortal (newRV_noinc ((SV *)av));	393	PUSHs (rv);
173	}	394	}
		395	break;
174		396
175	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;
176	}	435	}
177	break;
178		436
179	case REQ_OPEN:	437	errno = req->errorno;
180	{
181	/* convert fd to fh */
182	SV *fh;
183		438
184	XPUSHs (sv_2mortal (newSViv (req->result)));
185	PUTBACK;	439	PUTBACK;
186	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
187	SPAGAIN;
188
189	fh = SvREFCNT_inc (POPs);
190
191	PUSHMARK (SP);
192	XPUSHs (sv_2mortal (fh));
193	}
194	break;
195
196	case REQ_SLEEP:
197	case REQ_GROUP:
198	break;
199
200	default:
201	XPUSHs (sv_2mortal (newSViv (req->result)));
202	break;
203	}
204
205
206	PUTBACK;
207	call_sv (req->callback, G_VOID | G_EVAL);	440	call_sv (req->callback, G_VOID | G_EVAL);
208	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	}
209		460
210	if (SvTRUE (ERRSV))	461	if (SvTRUE (ERRSV))
211	{	462	{
212	req_free (req);	463	req_free (req);
213	croak (0);	464	croak (0);
214	}	465	}
215
216	LEAVE;
217
218	errno = errorno;
219	}	466	}
220		467
221	static void req_free (aio_req req)	468	static void req_free (aio_req req)
222	{	469	{
223	if (req->grp)
224	{
225	aio_req grp = req->grp;
226
227	/* unlink request */
228	req->grp_next->grp_prev = req->grp_prev;
229	req->grp_prev->grp_next = req->grp_next;
230
231	if (grp->grp_next == grp && grp->fd)
232	{
233	req_invoke (grp);
234	req_free (grp);
235	}
236	}
237
238	if (req->self)	470	if (req->self)
239	{	471	{
240	sv_unmagic (req->self, PERL_MAGIC_ext);	472	sv_unmagic (req->self, PERL_MAGIC_ext);
241	SvREFCNT_dec (req->self);	473	SvREFCNT_dec (req->self);
242	}	474	}
243		475
244	if (req->data)
245	SvREFCNT_dec (req->data);	476	SvREFCNT_dec (req->data);
246
247	if (req->fh)
248	SvREFCNT_dec (req->fh);	477	SvREFCNT_dec (req->fh);
249
250	if (req->fh2)
251	SvREFCNT_dec (req->fh2);	478	SvREFCNT_dec (req->fh2);
252
253	if (req->statdata)
254	Safefree (req->statdata);
255
256	if (req->callback)
257	SvREFCNT_dec (req->callback);	479	SvREFCNT_dec (req->callback);
		480	Safefree (req->statdata);
258		481
259	if (req->type == REQ_READDIR && req->result >= 0)	482	if (req->type == REQ_READDIR)
260	free (req->data2ptr);	483	free (req->data2ptr);
261		484
262	Safefree (req);	485	Safefree (req);
263	}	486	}
264		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
265	static void req_cancel (aio_req req)	502	static void req_cancel (aio_req req)
266	{	503	{
267	req->cancelled = 1;	504	req->flags |= FLAG_CANCELLED;
268		505
269	if (req->type == REQ_GROUP)	506	req_cancel_subs (req);
270	{
271	aio_req sub;
272
273	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
274	req_cancel (sub);
275	}
276	}	507	}
277		508
278	static int poll_cb ()	509	static int poll_cb (int max)
279	{	510	{
280	dSP;	511	dSP;
281	int count = 0;	512	int count = 0;
282	int do_croak = 0;	513	int do_croak = 0;
283	aio_req req;	514	aio_req req;
284		515
285	for (;;)	516	for (;;)
286	{	517	{
287	pthread_mutex_lock (&reslock);	518	while (max <= 0 || count < max)
288	req = ress;
289
290	if (req)
291	{	519	{
292	ress = req->next;	520	LOCK (reslock);
		521	req = reqq_shift (&res_queue);
293		522
294	if (!ress)	523	if (req)
295	{	524	{
		525	--npending;
		526
		527	if (!res_queue.size)
		528	{
296	/* read any signals sent by the worker threads */	529	/* read any signals sent by the worker threads */
297	char buf [32];	530	char buf [32];
298	while (read (respipe [0], buf, 32) == 32)	531	while (read (respipe [0], buf, 32) == 32)
		532	;
299	;	533	}
300
301	rese = 0;
302	}	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);
303	}	571	}
304		572
305	pthread_mutex_unlock (&reslock);	573	if (nreqs <= max_outstanding)
306
307	if (!req)
308	break;	574	break;
309		575
310	nreqs--;	576	poll_wait ();
311		577
312	if (req->type == REQ_QUIT)	578	max = 0;
313	started--;
314	else if (req->type == REQ_GROUP && req->grp_next != req)
315	{
316	req->fd = 1; /* mark request as delayed */
317	continue;
318	}
319	else
320	{
321	if (req->type == REQ_READ)
322	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
323
324	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
325	SvREADONLY_off (req->data);
326
327	if (req->statdata)
328	{
329	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
330	PL_laststatval = req->result;
331	PL_statcache = *(req->statdata);
332	}
333
334	req_invoke (req);
335
336	count++;
337	}
338
339	req_free (req);
340	}	579	}
341		580
342	return count;	581	return count;
343	}	582	}
344		583
345	static void *aio_proc(void *arg);	584	static void *aio_proc(void *arg);
346		585
347	static void start_thread (void)	586	static void start_thread (void)
348	{	587	{
349	sigset_t fullsigset, oldsigset;	588	sigset_t fullsigset, oldsigset;
350	pthread_t tid;
351	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");
352		595
353	pthread_attr_init (&attr);	596	pthread_attr_init (&attr);
354	pthread_attr_setstacksize (&attr, STACKSIZE);	597	pthread_attr_setstacksize (&attr, STACKSIZE);
355	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
356		599
357	sigfillset (&fullsigset);	600	sigfillset (&fullsigset);
		601
		602	LOCK (wrklock);
358	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
359		604
360	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;
361	started++;	611	++started;
		612	}
		613	else
		614	free (wrk);
362		615
363	sigprocmask (SIG_SETMASK, &oldsigset, 0);	616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		617	UNLOCK (wrklock);
364	}	618	}
365		619
366	static void req_send (aio_req req)	620	static void req_send (aio_req req)
367	{	621	{
368	while (started < wanted && nreqs >= started)	622	while (started < wanted && nreqs >= started)
369	start_thread ();	623	start_thread ();
370		624
371	nreqs++;	625	++nreqs;
372		626
373	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
374		628	++nready;
375	req->next = 0;	629	reqq_push (&req_queue, req);
376
377	if (reqe)
378	{
379	reqe->next = req;
380	reqe = req;
381	}
382	else
383	reqe = reqs = req;
384
385	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
386	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
387
388	if (nreqs > max_outstanding)
389	for (;;)
390	{
391	poll_cb ();
392
393	if (nreqs <= max_outstanding)
394	break;
395
396	poll_wait ();
397	}
398	}	632	}
399		633
400	static void end_thread (void)	634	static void end_thread (void)
401	{	635	{
402	aio_req req;	636	aio_req req;
		637
403	Newz (0, req, 1, aio_cb);	638	Newz (0, req, 1, aio_cb);
		639
404	req->type = REQ_QUIT;	640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
405		642
406	req_send (req);	643	req_send (req);
407	}	644	}
408		645
409	static void min_parallel (int nthreads)	646	static void min_parallel (int nthreads)
…		…
426	}	663	}
427		664
428	while (started > wanted)	665	while (started > wanted)
429	{	666	{
430	poll_wait ();	667	poll_wait ();
431	poll_cb ();	668	poll_cb (0);
432	}	669	}
433	}	670	}
434		671
435	static void create_pipe ()	672	static void create_pipe ()
436	{	673	{
…		…
461	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)
462	{	699	{
463	ssize_t res;	700	ssize_t res;
464	off_t ooffset;	701	off_t ooffset;
465		702
466	pthread_mutex_lock (&preadwritelock);	703	LOCK (preadwritelock);
467	ooffset = lseek (fd, 0, SEEK_CUR);	704	ooffset = lseek (fd, 0, SEEK_CUR);
468	lseek (fd, offset, SEEK_SET);	705	lseek (fd, offset, SEEK_SET);
469	res = read (fd, buf, count);	706	res = read (fd, buf, count);
470	lseek (fd, ooffset, SEEK_SET);	707	lseek (fd, ooffset, SEEK_SET);
471	pthread_mutex_unlock (&preadwritelock);	708	UNLOCK (preadwritelock);
472		709
473	return res;	710	return res;
474	}	711	}
475		712
476	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)
477	{	714	{
478	ssize_t res;	715	ssize_t res;
479	off_t ooffset;	716	off_t ooffset;
480		717
481	pthread_mutex_lock (&preadwritelock);	718	LOCK (preadwritelock);
482	ooffset = lseek (fd, 0, SEEK_CUR);	719	ooffset = lseek (fd, 0, SEEK_CUR);
483	lseek (fd, offset, SEEK_SET);	720	lseek (fd, offset, SEEK_SET);
484	res = write (fd, buf, count);	721	res = write (fd, buf, count);
485	lseek (fd, offset, SEEK_SET);	722	lseek (fd, offset, SEEK_SET);
486	pthread_mutex_unlock (&preadwritelock);	723	UNLOCK (preadwritelock);
487		724
488	return res;	725	return res;
489	}	726	}
490	#endif	727	#endif
491		728
492	#if !HAVE_FDATASYNC	729	#if !HAVE_FDATASYNC
493	# define fdatasync fsync	730	# define fdatasync fsync
494	#endif	731	#endif
495		732
496	#if !HAVE_READAHEAD	733	#if !HAVE_READAHEAD
497	# define readahead aio_readahead	734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
498		735
499	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)
500	{	737	{
501	char readahead_buf[4096];	738	dBUF;
502		739
503	while (count > 0)	740	while (count > 0)
504	{	741	{
505	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
506		743
507	pread (fd, readahead_buf, len, offset);	744	pread (fd, aio_buf, len, offset);
508	offset += len;	745	offset += len;
509	count -= len;	746	count -= len;
510	}	747	}
511		748
512	errno = 0;	749	errno = 0;
513	}	750	}
		751
514	#endif	752	#endif
515		753
516	#if !HAVE_READDIR_R	754	#if !HAVE_READDIR_R
517	# define readdir_r aio_readdir_r	755	# define readdir_r aio_readdir_r
518		756
…		…
521	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)
522	{	760	{
523	struct dirent *e;	761	struct dirent *e;
524	int errorno;	762	int errorno;
525		763
526	pthread_mutex_lock (&readdirlock);	764	LOCK (readdirlock);
527		765
528	e = readdir (dirp);	766	e = readdir (dirp);
529	errorno = errno;	767	errorno = errno;
530		768
531	if (e)	769	if (e)
…		…
534	strcpy (ent->d_name, e->d_name);	772	strcpy (ent->d_name, e->d_name);
535	}	773	}
536	else	774	else
537	*res = 0;	775	*res = 0;
538		776
539	pthread_mutex_unlock (&readdirlock);	777	UNLOCK (readdirlock);
540		778
541	errno = errorno;	779	errno = errorno;
542	return e ? 0 : -1;	780	return e ? 0 : -1;
543	}	781	}
544	#endif	782	#endif
545		783
546	/* sendfile always needs emulation */	784	/* sendfile always needs emulation */
547	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)
548	{	786	{
549	ssize_t res;	787	ssize_t res;
550		788
551	if (!count)	789	if (!count)
552	return 0;	790	return 0;
…		…
563	{	801	{
564	off_t sbytes;	802	off_t sbytes;
565	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566		804
567	if (res < 0 && sbytes)	805	if (res < 0 && sbytes)
568	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
569	res = sbytes;	807	res = sbytes;
570	}	808	}
571		809
572	# elif __hpux	810	# elif __hpux
573	res = sendfile (ofd, ifd, offset, count, 0, 0);	811	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
601	#endif	839	#endif
602	)	840	)
603	)	841	)
604	{	842	{
605	/* emulate sendfile. this is a major pain in the ass */	843	/* emulate sendfile. this is a major pain in the ass */
606	char buf[4096];	844	dBUF;
		845
607	res = 0;	846	res = 0;
608		847
609	while (count)	848	while (count)
610	{	849	{
611	ssize_t cnt;	850	ssize_t cnt;
612		851
613	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
614		853
615	if (cnt <= 0)	854	if (cnt <= 0)
616	{	855	{
617	if (cnt && !res) res = -1;	856	if (cnt && !res) res = -1;
618	break;	857	break;
619	}	858	}
620		859
621	cnt = write (ofd, buf, cnt);	860	cnt = write (ofd, aio_buf, cnt);
622		861
623	if (cnt <= 0)	862	if (cnt <= 0)
624	{	863	{
625	if (cnt && !res) res = -1;	864	if (cnt && !res) res = -1;
626	break;	865	break;
…		…
634		873
635	return res;	874	return res;
636	}	875	}
637		876
638	/* read a full directory */	877	/* read a full directory */
639	static int scandir_ (const char *path, void **namesp)	878	static void scandir_ (aio_req req, worker *self)
640	{	879	{
641	DIR *dirp = opendir (path);	880	DIR *dirp;
642	union	881	union
643	{	882	{
644	struct dirent d;	883	struct dirent d;
645	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646	} u;	885	} *u;
647	struct dirent *entp;	886	struct dirent *entp;
648	char *name, *names;	887	char *name, *names;
649	int memlen = 4096;	888	int memlen = 4096;
650	int memofs = 0;	889	int memofs = 0;
651	int res = 0;	890	int res = 0;
652	int errorno;	891	int errorno;
653		892
654	if (!dirp)	893	LOCK (wrklock);
655	return -1;	894	self->dirp = dirp = opendir (req->dataptr);
656		895	self->dbuf = u = malloc (sizeof (*u));
657	names = malloc (memlen);	896	req->data2ptr = names = malloc (memlen);
		897	UNLOCK (wrklock);
658		898
		899	if (dirp && u && names)
659	for (;;)	900	for (;;)
660	{	901	{
		902	errno = 0;
661	errno = 0, readdir_r (dirp, &u.d, &entp);	903	readdir_r (dirp, &u->d, &entp);
662		904
663	if (!entp)	905	if (!entp)
664	break;	906	break;
665		907
666	name = entp->d_name;	908	name = entp->d_name;
667		909
668	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
669	{	911	{
670	int len = strlen (name) + 1;	912	int len = strlen (name) + 1;
671		913
672	res++;	914	res++;
673		915
674	while (memofs + len > memlen)	916	while (memofs + len > memlen)
675	{	917	{
676	memlen *= 2;	918	memlen *= 2;
		919	LOCK (wrklock);
677	names = realloc (names, memlen);	920	req->data2ptr = names = realloc (names, memlen);
		921	UNLOCK (wrklock);
		922
678	if (!names)	923	if (!names)
679	break;	924	break;
680	}	925	}
681		926
682	memcpy (names + memofs, name, len);	927	memcpy (names + memofs, name, len);
683	memofs += len;	928	memofs += len;
684	}	929	}
685	}	930	}
686		931
687	errorno = errno;
688	closedir (dirp);
689
690	if (errorno)	932	if (errno)
691	{
692	free (names);
693	errno = errorno;
694	res = -1;	933	res = -1;
695	}	934
696		935	req->result = res;
697	*namesp = (void *)names;
698	return res;
699	}	936	}
700		937
701	/*****************************************************************************/	938	/*****************************************************************************/
702		939
703	static void *aio_proc (void *thr_arg)	940	static void *aio_proc (void *thr_arg)
704	{	941	{
705	aio_req req;	942	aio_req req;
706	int type;	943	int type;
		944	worker *self = (worker *)thr_arg;
707		945
708	do	946	do
709	{	947	{
710	pthread_mutex_lock (&reqlock);	948	LOCK (reqlock);
711		949
712	for (;;)	950	for (;;)
713	{	951	{
714	req = reqs;	952	self->req = req = reqq_shift (&req_queue);
715
716	if (reqs)
717	{
718	reqs = reqs->next;
719	if (!reqs) reqe = 0;
720	}
721		953
722	if (req)	954	if (req)
723	break;	955	break;
724		956
725	pthread_cond_wait (&reqwait, &reqlock);	957	pthread_cond_wait (&reqwait, &reqlock);
726	}	958	}
727		959
728	pthread_mutex_unlock (&reqlock);	960	--nready;
		961
		962	UNLOCK (reqlock);
729		963
730	errno = 0; /* strictly unnecessary */	964	errno = 0; /* strictly unnecessary */
		965	type = req->type; /* remember type for QUIT check */
731		966
732	if (!req->cancelled)	967	if (!(req->flags & FLAG_CANCELLED))
733	switch (req->type)	968	switch (type)
734	{	969	{
735	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;
736	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;
737		972
738	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;
739	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;
740		975
741	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
742	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
743	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
744		979
…		…
750	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
751	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
752		987
753	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
754	case REQ_FSYNC: req->result = fsync (req->fd); break;	989	case REQ_FSYNC: req->result = fsync (req->fd); break;
755	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	990	case REQ_READDIR: scandir_ (req, self); break;
756		991
757	case REQ_SLEEP:	992	case REQ_BUSY:
758	{	993	{
759	struct timeval tv;	994	struct timeval tv;
760		995
761	tv.tv_sec = req->fd;	996	tv.tv_sec = req->fd;
762	tv.tv_usec = req->fd2;	997	tv.tv_usec = req->fd2;
763		998
764	req->result = select (0, 0, 0, 0, &tv);	999	req->result = select (0, 0, 0, 0, &tv);
765	}	1000	}
766		1001
		1002	case REQ_GROUP:
		1003	case REQ_NOP:
767	case REQ_QUIT:	1004	case REQ_QUIT:
768	break;	1005	break;
769		1006
770	default:	1007	default:
771	req->result = ENOSYS;	1008	req->result = ENOSYS;
772	break;	1009	break;
773	}	1010	}
774		1011
775	req->errorno = errno;	1012	req->errorno = errno;
776		1013
777	pthread_mutex_lock (&reslock);	1014	LOCK (reslock);
778		1015
779	req->next = 0;	1016	++npending;
780		1017
781	if (rese)	1018	if (!reqq_push (&res_queue, req))
782	{
783	rese->next = req;
784	rese = req;
785	}
786	else
787	{
788	rese = ress = req;
789
790	/* write a dummy byte to the pipe so fh becomes ready */	1019	/* write a dummy byte to the pipe so fh becomes ready */
791	write (respipe [1], &respipe, 1);	1020	write (respipe [1], &respipe, 1);
792	}
793		1021
794	pthread_mutex_unlock (&reslock);	1022	self->req = 0;
		1023	worker_clear (self);
		1024
		1025	UNLOCK (reslock);
795	}	1026	}
796	while (type != REQ_QUIT);	1027	while (type != REQ_QUIT);
797		1028
		1029	LOCK (wrklock);
		1030	worker_free (self);
		1031	UNLOCK (wrklock);
		1032
798	return 0;	1033	return 0;
799	}	1034	}
800		1035
801	/*****************************************************************************/	1036	/*****************************************************************************/
802		1037
803	static void atfork_prepare (void)	1038	static void atfork_prepare (void)
804	{	1039	{
805	pthread_mutex_lock (&reqlock);	1040	LOCK (wrklock);
806	pthread_mutex_lock (&reslock);	1041	LOCK (reqlock);
		1042	LOCK (reslock);
807	#if !HAVE_PREADWRITE	1043	#if !HAVE_PREADWRITE
808	pthread_mutex_lock (&preadwritelock);	1044	LOCK (preadwritelock);
809	#endif	1045	#endif
810	#if !HAVE_READDIR_R	1046	#if !HAVE_READDIR_R
811	pthread_mutex_lock (&readdirlock);	1047	LOCK (readdirlock);
812	#endif	1048	#endif
813	}	1049	}
814		1050
815	static void atfork_parent (void)	1051	static void atfork_parent (void)
816	{	1052	{
817	#if !HAVE_READDIR_R	1053	#if !HAVE_READDIR_R
818	pthread_mutex_unlock (&readdirlock);	1054	UNLOCK (readdirlock);
819	#endif	1055	#endif
820	#if !HAVE_PREADWRITE	1056	#if !HAVE_PREADWRITE
821	pthread_mutex_unlock (&preadwritelock);	1057	UNLOCK (preadwritelock);
822	#endif	1058	#endif
823	pthread_mutex_unlock (&reslock);	1059	UNLOCK (reslock);
824	pthread_mutex_unlock (&reqlock);	1060	UNLOCK (reqlock);
		1061	UNLOCK (wrklock);
825	}	1062	}
826		1063
827	static void atfork_child (void)	1064	static void atfork_child (void)
828	{	1065	{
829	aio_req prv;	1066	aio_req prv;
830		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
831	started = 0;	1085	started = 0;
832		1086	nreqs = 0;
833	while (reqs)
834	{
835	prv = reqs;
836	reqs = prv->next;
837	req_free (prv);
838	}
839
840	reqs = reqe = 0;
841
842	while (ress)
843	{
844	prv = ress;
845	ress = prv->next;
846	req_free (prv);
847	}
848
849	ress = rese = 0;
850		1087
851	close (respipe [0]);	1088	close (respipe [0]);
852	close (respipe [1]);	1089	close (respipe [1]);
853	create_pipe ();	1090	create_pipe ();
854		1091
855	atfork_parent ();	1092	atfork_parent ();
856	}	1093	}
857		1094
858	#define dREQ \	1095	#define dREQ \
859	aio_req req; \	1096	aio_req req; \
		1097	int req_pri = next_pri; \
		1098	next_pri = DEFAULT_PRI + PRI_BIAS; \
860	\	1099	\
861	if (SvOK (callback) && !SvROK (callback)) \	1100	if (SvOK (callback) && !SvROK (callback)) \
862	croak ("callback must be undef or of reference type"); \	1101	croak ("callback must be undef or of reference type"); \
863	\	1102	\
864	Newz (0, req, 1, aio_cb); \	1103	Newz (0, req, 1, aio_cb); \
865	if (!req) \	1104	if (!req) \
866	croak ("out of memory during aio_req allocation"); \	1105	croak ("out of memory during aio_req allocation"); \
867	\	1106	\
868	req->callback = newSVsv (callback)	1107	req->callback = newSVsv (callback); \
		1108	req->pri = req_pri
869		1109
870	#define REQ_SEND \	1110	#define REQ_SEND \
871	req_send (req); \	1111	req_send (req); \
872	\	1112	\
873	if (GIMME_V != G_VOID) \	1113	if (GIMME_V != G_VOID) \
…		…
887	create_pipe ();	1127	create_pipe ();
888	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
889	}	1129	}
890		1130
891	void	1131	void
892	min_parallel (nthreads)	1132	min_parallel (int nthreads)
893	int nthreads
894	PROTOTYPE: $	1133	PROTOTYPE: $
895		1134
896	void	1135	void
897	max_parallel (nthreads)	1136	max_parallel (int nthreads)
898	int nthreads
899	PROTOTYPE: $	1137	PROTOTYPE: $
900		1138
901	int	1139	int
902	max_outstanding (nreqs)	1140	max_outstanding (int maxreqs)
903	int nreqs	1141	PROTOTYPE: $
904	PROTOTYPE: $
905	CODE:	1142	CODE:
906	RETVAL = max_outstanding;	1143	RETVAL = max_outstanding;
907	max_outstanding = nreqs;	1144	max_outstanding = maxreqs;
		1145	OUTPUT:
		1146	RETVAL
908		1147
909	void	1148	void
910	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
911	SV * pathname	1150	SV * pathname
912	int flags	1151	int flags
…		…
1127		1366
1128	REQ_SEND;	1367	REQ_SEND;
1129	}	1368	}
1130		1369
1131	void	1370	void
1132	aio_sleep (delay,callback=&PL_sv_undef)	1371	aio_busy (delay,callback=&PL_sv_undef)
1133	double delay	1372	double delay
1134	SV * callback	1373	SV * callback
1135	PPCODE:	1374	PPCODE:
1136	{	1375	{
1137	dREQ;	1376	dREQ;
1138		1377
1139	req->type = REQ_SLEEP;	1378	req->type = REQ_BUSY;
1140	req->fd = delay < 0. ? 0 : delay;	1379	req->fd = delay < 0. ? 0 : delay;
1141	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1142		1381
1143	REQ_SEND;	1382	REQ_SEND;
1144	}	1383	}
…		…
1148	SV * callback	1387	SV * callback
1149	PROTOTYPE: ;$	1388	PROTOTYPE: ;$
1150	PPCODE:	1389	PPCODE:
1151	{	1390	{
1152	dREQ;	1391	dREQ;
		1392
1153	req->type = REQ_GROUP;	1393	req->type = REQ_GROUP;
1154	req->grp_next = req;
1155	req->grp_prev = req;
1156
1157	req_send (req);	1394	req_send (req);
		1395
1158	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1159	}	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;
1160		1432
1161	void	1433	void
1162	flush ()	1434	flush ()
1163	PROTOTYPE:	1435	PROTOTYPE:
1164	CODE:	1436	CODE:
1165	while (nreqs)	1437	while (nreqs)
1166	{	1438	{
1167	poll_wait ();	1439	poll_wait ();
1168	poll_cb ();	1440	poll_cb (0);
1169	}	1441	}
1170		1442
1171	void	1443	void
1172	poll()	1444	poll()
1173	PROTOTYPE:	1445	PROTOTYPE:
1174	CODE:	1446	CODE:
1175	if (nreqs)	1447	if (nreqs)
1176	{	1448	{
1177	poll_wait ();	1449	poll_wait ();
1178	poll_cb ();	1450	poll_cb (0);
1179	}	1451	}
1180		1452
1181	int	1453	int
1182	poll_fileno()	1454	poll_fileno()
1183	PROTOTYPE:	1455	PROTOTYPE:
…		…
1188		1460
1189	int	1461	int
1190	poll_cb(...)	1462	poll_cb(...)
1191	PROTOTYPE:	1463	PROTOTYPE:
1192	CODE:	1464	CODE:
1193	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);
1194	OUTPUT:	1474	OUTPUT:
1195	RETVAL	1475	RETVAL
1196		1476
1197	void	1477	void
1198	poll_wait()	1478	poll_wait()
…		…
1207	CODE:	1487	CODE:
1208	RETVAL = nreqs;	1488	RETVAL = nreqs;
1209	OUTPUT:	1489	OUTPUT:
1210	RETVAL	1490	RETVAL
1211		1491
1212	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1492	int
1213		1493	nready()
1214	void
1215	cancel (aio_req_ornot req)
1216	PROTOTYPE:	1494	PROTOTYPE:
1217	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:
1218	req_cancel (req);	1519	req_cancel (req);
1219		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
1220	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221		1528
1222	void	1529	void
1223	add (aio_req grp, ...)	1530	add (aio_req grp, ...)
1224	PROTOTYPE: $;@
1225	PPCODE:	1531	PPCODE:
1226	{	1532	{
1227	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");
1228		1538
1229	for (i = 1; i < items; ++i )	1539	for (i = 1; i < items; ++i )
1230	{	1540	{
1231	if (GIMME_V != G_VOID)	1541	if (GIMME_V != G_VOID)
1232	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233		1543
1234	aio_req req = SvAIO_REQ (ST (i));	1544	req = SvAIO_REQ (ST (i));
1235		1545
1236	if (req)	1546	if (req)
1237	{	1547	{
1238	req->grp_prev = grp;	1548	++grp->length;
1239	req->grp_next = grp->grp_next;
1240	grp->grp_next->grp_prev = req;
1241	grp->grp_next = req;
1242
1243	req->grp = grp;	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;
1244	}	1558	}
1245	}	1559	}
1246	}	1560	}
1247		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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