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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.49 by root, Sun Oct 22 13:33:28 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 *volatile next;	108	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
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	{
111	if (!req->self)	269	if (!req->self)
…		…
117	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)));
118	}	276	}
119		277
120	static aio_req SvAIO_REQ (SV *sv)	278	static aio_req SvAIO_REQ (SV *sv)
121	{	279	{
		280	MAGIC *mg;
		281
122	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	282	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
123	croak ("object of class " AIO_REQ_KLASS " expected");	283	croak ("object of class " AIO_REQ_KLASS " expected");
124		284
125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	285	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
126		286
127	return mg ? (aio_req)mg->mg_ptr : 0;	287	return mg ? (aio_req)mg->mg_ptr : 0;
128	}	288	}
129		289
130	static void aio_grp_feed (aio_req grp)	290	static void aio_grp_feed (aio_req grp)
131	{	291	{
132	while (grp->length < grp->fd2)	292	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
133	{	293	{
134	int old_len = grp->length;	294	int old_len = grp->length;
135		295
136	if (grp->fh2 && SvOK (grp->fh2))	296	if (grp->fh2 && SvOK (grp->fh2))
137	{	297	{
…		…
140	ENTER;	300	ENTER;
141	SAVETMPS;	301	SAVETMPS;
142	PUSHMARK (SP);	302	PUSHMARK (SP);
143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	303	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
144	PUTBACK;	304	PUTBACK;
145	call_sv (grp->fh2, G_VOID | G_EVAL);	305	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
146	SPAGAIN;	306	SPAGAIN;
147	FREETMPS;	307	FREETMPS;
148	LEAVE;	308	LEAVE;
149	}	309	}
150		310
…		…
156	break;	316	break;
157	}	317	}
158	}	318	}
159	}	319	}
160		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
161	static void poll_wait ()	336	static void poll_wait ()
162	{	337	{
163	if (nreqs && !ress)
164	{
165	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
166	FD_ZERO(&rfd);	350	FD_ZERO(&rfd);
167	FD_SET(respipe [0], &rfd);	351	FD_SET(respipe [0], &rfd);
168		352
169	select (respipe [0] + 1, &rfd, 0, 0, 0);	353	select (respipe [0] + 1, &rfd, 0, 0, 0);
170	}	354	}
171	}	355	}
172		356
173	static void req_invoke (aio_req req)	357	static void req_invoke (aio_req req)
174	{	358	{
175	dSP;	359	dSP;
176	int errorno = errno;
177		360
178	if (req->cancelled || !SvOK (req->callback))	361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
179	return;	362	{
180
181	errno = req->errorno;
182
183	ENTER;	363	ENTER;
184	SAVETMPS;	364	SAVETMPS;
185	PUSHMARK (SP);	365	PUSHMARK (SP);
186	EXTEND (SP, 1);	366	EXTEND (SP, 1);
187		367
188	switch (req->type)	368	switch (req->type)
189	{
190	case REQ_READDIR:
191	{	369	{
192	SV *rv = &PL_sv_undef;	370	case REQ_READDIR:
193
194	if (req->result >= 0)
195	{	371	{
196	char *buf = req->data2ptr;	372	SV *rv = &PL_sv_undef;
197	AV *av = newAV ();
198		373
199	while (req->result)	374	if (req->result >= 0)
200	{	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	{
201	SV *sv = newSVpv (buf, 0);	384	SV *sv = newSVpv (buf, 0);
202		385
203	av_push (av, sv);	386	av_store (av, i, sv);
204	buf += SvCUR (sv) + 1;	387	buf += SvCUR (sv) + 1;
205	req->result--;	388	}
		389
		390	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}	391	}
207		392
208	rv = sv_2mortal (newRV_noinc ((SV *)av));	393	PUSHs (rv);
209	}	394	}
		395	break;
210		396
211	PUSHs (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;
212	}	435	}
213	break;
214		436
215	case REQ_OPEN:	437	errno = req->errorno;
216	{
217	/* convert fd to fh */
218	SV *fh;
219		438
220	PUSHs (sv_2mortal (newSViv (req->result)));
221	PUTBACK;	439	PUTBACK;
222	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
223	SPAGAIN;
224
225	fh = SvREFCNT_inc (POPs);
226
227	PUSHMARK (SP);
228	XPUSHs (sv_2mortal (fh));
229	}
230	break;
231
232	case REQ_GROUP:
233	req->fd = 2; /* mark group as finished */
234
235	if (req->data)
236	{
237	int i;
238	AV *av = (AV *)req->data;
239
240	EXTEND (SP, AvFILL (av) + 1);
241	for (i = 0; i <= AvFILL (av); ++i)
242	PUSHs (*av_fetch (av, i, 0));
243	}
244	break;
245
246	case REQ_SLEEP:
247	break;
248
249	default:
250	PUSHs (sv_2mortal (newSViv (req->result)));
251	break;
252	}
253
254
255	PUTBACK;
256	call_sv (req->callback, G_VOID | G_EVAL);	440	call_sv (req->callback, G_VOID | G_EVAL);
257	SPAGAIN;	441	SPAGAIN;
258		442
259	if (SvTRUE (ERRSV))
260	{
261	req_free (req);
262	croak (0);
263	}
264
265	FREETMPS;	443	FREETMPS;
266	LEAVE;	444	LEAVE;
		445	}
267		446
268	errno = errorno;
269	}
270
271	static void req_free (aio_req req)
272	{
273	if (req->grp)	447	if (req->grp)
274	{	448	{
275	aio_req grp = req->grp;	449	aio_req grp = req->grp;
276		450
277	/* unlink request */	451	/* unlink request */
…		…
279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;	453	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
280		454
281	if (grp->grp_first == req)	455	if (grp->grp_first == req)
282	grp->grp_first = req->grp_next;	456	grp->grp_first = req->grp_next;
283		457
284	--grp->length;
285
286	/* call feeder, if applicable */
287	aio_grp_feed (grp);	458	aio_grp_dec (grp);
		459	}
288		460
289	/* finish, if done */	461	if (SvTRUE (ERRSV))
290	if (!grp->length && grp->fd)	462	{
291	{
292	req_invoke (grp);
293	req_free (grp);	463	req_free (req);
294	}	464	croak (0);
295	}	465	}
		466	}
296		467
		468	static void req_free (aio_req req)
		469	{
297	if (req->self)	470	if (req->self)
298	{	471	{
299	sv_unmagic (req->self, PERL_MAGIC_ext);	472	sv_unmagic (req->self, PERL_MAGIC_ext);
300	SvREFCNT_dec (req->self);	473	SvREFCNT_dec (req->self);
301	}	474	}
…		…
304	SvREFCNT_dec (req->fh);	477	SvREFCNT_dec (req->fh);
305	SvREFCNT_dec (req->fh2);	478	SvREFCNT_dec (req->fh2);
306	SvREFCNT_dec (req->callback);	479	SvREFCNT_dec (req->callback);
307	Safefree (req->statdata);	480	Safefree (req->statdata);
308		481
309	if (req->type == REQ_READDIR && req->result >= 0)	482	if (req->type == REQ_READDIR)
310	free (req->data2ptr);	483	free (req->data2ptr);
311		484
312	Safefree (req);	485	Safefree (req);
313	}	486	}
314		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
315	static void req_cancel (aio_req req)	502	static void req_cancel (aio_req req)
316	{	503	{
317	req->cancelled = 1;	504	req->flags |= FLAG_CANCELLED;
318		505
319	if (req->type == REQ_GROUP)	506	req_cancel_subs (req);
320	{
321	aio_req sub;
322
323	for (sub = req->grp_first; sub; sub = sub->grp_next)
324	req_cancel (sub);
325	}
326	}	507	}
327		508
328	static int poll_cb ()	509	static int poll_cb (int max)
329	{	510	{
330	dSP;	511	dSP;
331	int count = 0;	512	int count = 0;
332	int do_croak = 0;	513	int do_croak = 0;
333	aio_req req;	514	aio_req req;
334		515
335	for (;;)	516	for (;;)
336	{	517	{
337	pthread_mutex_lock (&reslock);	518	while (max <= 0 || count < max)
338	req = ress;
339
340	if (req)
341	{	519	{
342	ress = req->next;	520	LOCK (reslock);
		521	req = reqq_shift (&res_queue);
343		522
344	if (!ress)	523	if (req)
345	{	524	{
		525	--npending;
		526
		527	if (!res_queue.size)
		528	{
346	/* read any signals sent by the worker threads */	529	/* read any signals sent by the worker threads */
347	char buf [32];	530	char buf [32];
348	while (read (respipe [0], buf, 32) == 32)	531	while (read (respipe [0], buf, 32) == 32)
		532	;
349	;	533	}
350
351	rese = 0;
352	}	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);
353	}	571	}
354		572
355	pthread_mutex_unlock (&reslock);	573	if (nreqs <= max_outstanding)
356
357	if (!req)
358	break;	574	break;
359		575
360	nreqs--;	576	poll_wait ();
361		577
362	if (req->type == REQ_QUIT)	578	max = 0;
363	started--;
364	else if (req->type == REQ_GROUP && req->length)
365	{
366	req->fd = 1; /* mark request as delayed */
367	continue;
368	}
369	else
370	{
371	if (req->type == REQ_READ)
372	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
373
374	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
375	SvREADONLY_off (req->data);
376
377	if (req->statdata)
378	{
379	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
380	PL_laststatval = req->result;
381	PL_statcache = *(req->statdata);
382	}
383
384	req_invoke (req);
385
386	count++;
387	}
388
389	req_free (req);
390	}	579	}
391		580
392	return count;	581	return count;
393	}	582	}
394		583
395	static void *aio_proc(void *arg);	584	static void *aio_proc(void *arg);
396		585
397	static void start_thread (void)	586	static void start_thread (void)
398	{	587	{
399	sigset_t fullsigset, oldsigset;	588	sigset_t fullsigset, oldsigset;
400	pthread_t tid;
401	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");
402		595
403	pthread_attr_init (&attr);	596	pthread_attr_init (&attr);
404	pthread_attr_setstacksize (&attr, STACKSIZE);	597	pthread_attr_setstacksize (&attr, STACKSIZE);
405	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
406		599
407	sigfillset (&fullsigset);	600	sigfillset (&fullsigset);
		601
		602	LOCK (wrklock);
408	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
409		604
410	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;
411	started++;	611	++started;
		612	}
		613	else
		614	free (wrk);
412		615
413	sigprocmask (SIG_SETMASK, &oldsigset, 0);	616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		617	UNLOCK (wrklock);
414	}	618	}
415		619
416	static void req_send (aio_req req)	620	static void req_send (aio_req req)
417	{	621	{
418	while (started < wanted && nreqs >= started)	622	while (started < wanted && nreqs >= started)
419	start_thread ();	623	start_thread ();
420		624
421	nreqs++;	625	++nreqs;
422		626
423	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
424		628	++nready;
425	req->next = 0;	629	reqq_push (&req_queue, req);
426
427	if (reqe)
428	{
429	reqe->next = req;
430	reqe = req;
431	}
432	else
433	reqe = reqs = req;
434
435	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
436	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
437
438	if (nreqs > max_outstanding)
439	for (;;)
440	{
441	poll_cb ();
442
443	if (nreqs <= max_outstanding)
444	break;
445
446	poll_wait ();
447	}
448	}	632	}
449		633
450	static void end_thread (void)	634	static void end_thread (void)
451	{	635	{
452	aio_req req;	636	aio_req req;
		637
453	Newz (0, req, 1, aio_cb);	638	Newz (0, req, 1, aio_cb);
		639
454	req->type = REQ_QUIT;	640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
455		642
456	req_send (req);	643	req_send (req);
457	}	644	}
458		645
459	static void min_parallel (int nthreads)	646	static void min_parallel (int nthreads)
…		…
476	}	663	}
477		664
478	while (started > wanted)	665	while (started > wanted)
479	{	666	{
480	poll_wait ();	667	poll_wait ();
481	poll_cb ();	668	poll_cb (0);
482	}	669	}
483	}	670	}
484		671
485	static void create_pipe ()	672	static void create_pipe ()
486	{	673	{
…		…
511	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)
512	{	699	{
513	ssize_t res;	700	ssize_t res;
514	off_t ooffset;	701	off_t ooffset;
515		702
516	pthread_mutex_lock (&preadwritelock);	703	LOCK (preadwritelock);
517	ooffset = lseek (fd, 0, SEEK_CUR);	704	ooffset = lseek (fd, 0, SEEK_CUR);
518	lseek (fd, offset, SEEK_SET);	705	lseek (fd, offset, SEEK_SET);
519	res = read (fd, buf, count);	706	res = read (fd, buf, count);
520	lseek (fd, ooffset, SEEK_SET);	707	lseek (fd, ooffset, SEEK_SET);
521	pthread_mutex_unlock (&preadwritelock);	708	UNLOCK (preadwritelock);
522		709
523	return res;	710	return res;
524	}	711	}
525		712
526	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)
527	{	714	{
528	ssize_t res;	715	ssize_t res;
529	off_t ooffset;	716	off_t ooffset;
530		717
531	pthread_mutex_lock (&preadwritelock);	718	LOCK (preadwritelock);
532	ooffset = lseek (fd, 0, SEEK_CUR);	719	ooffset = lseek (fd, 0, SEEK_CUR);
533	lseek (fd, offset, SEEK_SET);	720	lseek (fd, offset, SEEK_SET);
534	res = write (fd, buf, count);	721	res = write (fd, buf, count);
535	lseek (fd, offset, SEEK_SET);	722	lseek (fd, offset, SEEK_SET);
536	pthread_mutex_unlock (&preadwritelock);	723	UNLOCK (preadwritelock);
537		724
538	return res;	725	return res;
539	}	726	}
540	#endif	727	#endif
541		728
542	#if !HAVE_FDATASYNC	729	#if !HAVE_FDATASYNC
543	# define fdatasync fsync	730	# define fdatasync fsync
544	#endif	731	#endif
545		732
546	#if !HAVE_READAHEAD	733	#if !HAVE_READAHEAD
547	# define readahead aio_readahead	734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
548		735
549	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)
550	{	737	{
551	char readahead_buf[4096];	738	dBUF;
552		739
553	while (count > 0)	740	while (count > 0)
554	{	741	{
555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
556		743
557	pread (fd, readahead_buf, len, offset);	744	pread (fd, aio_buf, len, offset);
558	offset += len;	745	offset += len;
559	count -= len;	746	count -= len;
560	}	747	}
561		748
562	errno = 0;	749	errno = 0;
563	}	750	}
		751
564	#endif	752	#endif
565		753
566	#if !HAVE_READDIR_R	754	#if !HAVE_READDIR_R
567	# define readdir_r aio_readdir_r	755	# define readdir_r aio_readdir_r
568		756
…		…
571	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)
572	{	760	{
573	struct dirent *e;	761	struct dirent *e;
574	int errorno;	762	int errorno;
575		763
576	pthread_mutex_lock (&readdirlock);	764	LOCK (readdirlock);
577		765
578	e = readdir (dirp);	766	e = readdir (dirp);
579	errorno = errno;	767	errorno = errno;
580		768
581	if (e)	769	if (e)
…		…
584	strcpy (ent->d_name, e->d_name);	772	strcpy (ent->d_name, e->d_name);
585	}	773	}
586	else	774	else
587	*res = 0;	775	*res = 0;
588		776
589	pthread_mutex_unlock (&readdirlock);	777	UNLOCK (readdirlock);
590		778
591	errno = errorno;	779	errno = errorno;
592	return e ? 0 : -1;	780	return e ? 0 : -1;
593	}	781	}
594	#endif	782	#endif
595		783
596	/* sendfile always needs emulation */	784	/* sendfile always needs emulation */
597	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)
598	{	786	{
599	ssize_t res;	787	ssize_t res;
600		788
601	if (!count)	789	if (!count)
602	return 0;	790	return 0;
…		…
613	{	801	{
614	off_t sbytes;	802	off_t sbytes;
615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
616		804
617	if (res < 0 && sbytes)	805	if (res < 0 && sbytes)
618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
619	res = sbytes;	807	res = sbytes;
620	}	808	}
621		809
622	# elif __hpux	810	# elif __hpux
623	res = sendfile (ofd, ifd, offset, count, 0, 0);	811	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
651	#endif	839	#endif
652	)	840	)
653	)	841	)
654	{	842	{
655	/* emulate sendfile. this is a major pain in the ass */	843	/* emulate sendfile. this is a major pain in the ass */
656	char buf[4096];	844	dBUF;
		845
657	res = 0;	846	res = 0;
658		847
659	while (count)	848	while (count)
660	{	849	{
661	ssize_t cnt;	850	ssize_t cnt;
662		851
663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
664		853
665	if (cnt <= 0)	854	if (cnt <= 0)
666	{	855	{
667	if (cnt && !res) res = -1;	856	if (cnt && !res) res = -1;
668	break;	857	break;
669	}	858	}
670		859
671	cnt = write (ofd, buf, cnt);	860	cnt = write (ofd, aio_buf, cnt);
672		861
673	if (cnt <= 0)	862	if (cnt <= 0)
674	{	863	{
675	if (cnt && !res) res = -1;	864	if (cnt && !res) res = -1;
676	break;	865	break;
…		…
684		873
685	return res;	874	return res;
686	}	875	}
687		876
688	/* read a full directory */	877	/* read a full directory */
689	static int scandir_ (const char *path, void **namesp)	878	static void scandir_ (aio_req req, worker *self)
690	{	879	{
691	DIR *dirp = opendir (path);	880	DIR *dirp;
692	union	881	union
693	{	882	{
694	struct dirent d;	883	struct dirent d;
695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
696	} u;	885	} *u;
697	struct dirent *entp;	886	struct dirent *entp;
698	char *name, *names;	887	char *name, *names;
699	int memlen = 4096;	888	int memlen = 4096;
700	int memofs = 0;	889	int memofs = 0;
701	int res = 0;	890	int res = 0;
702	int errorno;	891	int errorno;
703		892
704	if (!dirp)	893	LOCK (wrklock);
705	return -1;	894	self->dirp = dirp = opendir (req->dataptr);
706		895	self->dbuf = u = malloc (sizeof (*u));
707	names = malloc (memlen);	896	req->data2ptr = names = malloc (memlen);
		897	UNLOCK (wrklock);
708		898
		899	if (dirp && u && names)
709	for (;;)	900	for (;;)
710	{	901	{
		902	errno = 0;
711	errno = 0, readdir_r (dirp, &u.d, &entp);	903	readdir_r (dirp, &u->d, &entp);
712		904
713	if (!entp)	905	if (!entp)
714	break;	906	break;
715		907
716	name = entp->d_name;	908	name = entp->d_name;
717		909
718	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
719	{	911	{
720	int len = strlen (name) + 1;	912	int len = strlen (name) + 1;
721		913
722	res++;	914	res++;
723		915
724	while (memofs + len > memlen)	916	while (memofs + len > memlen)
725	{	917	{
726	memlen *= 2;	918	memlen *= 2;
		919	LOCK (wrklock);
727	names = realloc (names, memlen);	920	req->data2ptr = names = realloc (names, memlen);
		921	UNLOCK (wrklock);
		922
728	if (!names)	923	if (!names)
729	break;	924	break;
730	}	925	}
731		926
732	memcpy (names + memofs, name, len);	927	memcpy (names + memofs, name, len);
733	memofs += len;	928	memofs += len;
734	}	929	}
735	}	930	}
736		931
737	errorno = errno;
738	closedir (dirp);
739
740	if (errorno)	932	if (errno)
741	{
742	free (names);
743	errno = errorno;
744	res = -1;	933	res = -1;
745	}	934
746		935	req->result = res;
747	*namesp = (void *)names;
748	return res;
749	}	936	}
750		937
751	/*****************************************************************************/	938	/*****************************************************************************/
752		939
753	static void *aio_proc (void *thr_arg)	940	static void *aio_proc (void *thr_arg)
754	{	941	{
755	aio_req req;	942	aio_req req;
756	int type;	943	int type;
		944	worker *self = (worker *)thr_arg;
757		945
758	do	946	do
759	{	947	{
760	pthread_mutex_lock (&reqlock);	948	LOCK (reqlock);
761		949
762	for (;;)	950	for (;;)
763	{	951	{
764	req = reqs;	952	self->req = req = reqq_shift (&req_queue);
765
766	if (reqs)
767	{
768	reqs = reqs->next;
769	if (!reqs) reqe = 0;
770	}
771		953
772	if (req)	954	if (req)
773	break;	955	break;
774		956
775	pthread_cond_wait (&reqwait, &reqlock);	957	pthread_cond_wait (&reqwait, &reqlock);
776	}	958	}
777		959
778	pthread_mutex_unlock (&reqlock);	960	--nready;
		961
		962	UNLOCK (reqlock);
779		963
780	errno = 0; /* strictly unnecessary */	964	errno = 0; /* strictly unnecessary */
		965	type = req->type; /* remember type for QUIT check */
781		966
782	if (!req->cancelled)	967	if (!(req->flags & FLAG_CANCELLED))
783	switch (req->type)	968	switch (type)
784	{	969	{
785	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;
786	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;
787		972
788	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;
789	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;
790		975
791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
794		979
…		…
800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
802		987
803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
804	case REQ_FSYNC: req->result = fsync (req->fd); break;	989	case REQ_FSYNC: req->result = fsync (req->fd); break;
805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	990	case REQ_READDIR: scandir_ (req, self); break;
806		991
807	case REQ_SLEEP:	992	case REQ_BUSY:
808	{	993	{
809	struct timeval tv;	994	struct timeval tv;
810		995
811	tv.tv_sec = req->fd;	996	tv.tv_sec = req->fd;
812	tv.tv_usec = req->fd2;	997	tv.tv_usec = req->fd2;
813		998
814	req->result = select (0, 0, 0, 0, &tv);	999	req->result = select (0, 0, 0, 0, &tv);
815	}	1000	}
816		1001
		1002	case REQ_GROUP:
		1003	case REQ_NOP:
817	case REQ_QUIT:	1004	case REQ_QUIT:
818	break;	1005	break;
819		1006
820	default:	1007	default:
821	req->result = ENOSYS;	1008	req->result = ENOSYS;
822	break;	1009	break;
823	}	1010	}
824		1011
825	req->errorno = errno;	1012	req->errorno = errno;
826		1013
827	pthread_mutex_lock (&reslock);	1014	LOCK (reslock);
828		1015
829	req->next = 0;	1016	++npending;
830		1017
831	if (rese)	1018	if (!reqq_push (&res_queue, req))
832	{
833	rese->next = req;
834	rese = req;
835	}
836	else
837	{
838	rese = ress = req;
839
840	/* write a dummy byte to the pipe so fh becomes ready */	1019	/* write a dummy byte to the pipe so fh becomes ready */
841	write (respipe [1], &respipe, 1);	1020	write (respipe [1], &respipe, 1);
842	}
843		1021
844	pthread_mutex_unlock (&reslock);	1022	self->req = 0;
		1023	worker_clear (self);
		1024
		1025	UNLOCK (reslock);
845	}	1026	}
846	while (type != REQ_QUIT);	1027	while (type != REQ_QUIT);
847		1028
		1029	LOCK (wrklock);
		1030	worker_free (self);
		1031	UNLOCK (wrklock);
		1032
848	return 0;	1033	return 0;
849	}	1034	}
850		1035
851	/*****************************************************************************/	1036	/*****************************************************************************/
852		1037
853	static void atfork_prepare (void)	1038	static void atfork_prepare (void)
854	{	1039	{
855	pthread_mutex_lock (&reqlock);	1040	LOCK (wrklock);
856	pthread_mutex_lock (&reslock);	1041	LOCK (reqlock);
		1042	LOCK (reslock);
857	#if !HAVE_PREADWRITE	1043	#if !HAVE_PREADWRITE
858	pthread_mutex_lock (&preadwritelock);	1044	LOCK (preadwritelock);
859	#endif	1045	#endif
860	#if !HAVE_READDIR_R	1046	#if !HAVE_READDIR_R
861	pthread_mutex_lock (&readdirlock);	1047	LOCK (readdirlock);
862	#endif	1048	#endif
863	}	1049	}
864		1050
865	static void atfork_parent (void)	1051	static void atfork_parent (void)
866	{	1052	{
867	#if !HAVE_READDIR_R	1053	#if !HAVE_READDIR_R
868	pthread_mutex_unlock (&readdirlock);	1054	UNLOCK (readdirlock);
869	#endif	1055	#endif
870	#if !HAVE_PREADWRITE	1056	#if !HAVE_PREADWRITE
871	pthread_mutex_unlock (&preadwritelock);	1057	UNLOCK (preadwritelock);
872	#endif	1058	#endif
873	pthread_mutex_unlock (&reslock);	1059	UNLOCK (reslock);
874	pthread_mutex_unlock (&reqlock);	1060	UNLOCK (reqlock);
		1061	UNLOCK (wrklock);
875	}	1062	}
876		1063
877	static void atfork_child (void)	1064	static void atfork_child (void)
878	{	1065	{
879	aio_req prv;	1066	aio_req prv;
880		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
881	started = 0;	1085	started = 0;
882		1086	nreqs = 0;
883	while (reqs)
884	{
885	prv = reqs;
886	reqs = prv->next;
887	req_free (prv);
888	}
889
890	reqs = reqe = 0;
891
892	while (ress)
893	{
894	prv = ress;
895	ress = prv->next;
896	req_free (prv);
897	}
898
899	ress = rese = 0;
900		1087
901	close (respipe [0]);	1088	close (respipe [0]);
902	close (respipe [1]);	1089	close (respipe [1]);
903	create_pipe ();	1090	create_pipe ();
904		1091
905	atfork_parent ();	1092	atfork_parent ();
906	}	1093	}
907		1094
908	#define dREQ \	1095	#define dREQ \
909	aio_req req; \	1096	aio_req req; \
		1097	int req_pri = next_pri; \
		1098	next_pri = DEFAULT_PRI + PRI_BIAS; \
910	\	1099	\
911	if (SvOK (callback) && !SvROK (callback)) \	1100	if (SvOK (callback) && !SvROK (callback)) \
912	croak ("callback must be undef or of reference type"); \	1101	croak ("callback must be undef or of reference type"); \
913	\	1102	\
914	Newz (0, req, 1, aio_cb); \	1103	Newz (0, req, 1, aio_cb); \
915	if (!req) \	1104	if (!req) \
916	croak ("out of memory during aio_req allocation"); \	1105	croak ("out of memory during aio_req allocation"); \
917	\	1106	\
918	req->callback = newSVsv (callback)	1107	req->callback = newSVsv (callback); \
		1108	req->pri = req_pri
919		1109
920	#define REQ_SEND \	1110	#define REQ_SEND \
921	req_send (req); \	1111	req_send (req); \
922	\	1112	\
923	if (GIMME_V != G_VOID) \	1113	if (GIMME_V != G_VOID) \
…		…
937	create_pipe ();	1127	create_pipe ();
938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
939	}	1129	}
940		1130
941	void	1131	void
942	min_parallel (nthreads)	1132	min_parallel (int nthreads)
943	int nthreads
944	PROTOTYPE: $	1133	PROTOTYPE: $
945		1134
946	void	1135	void
947	max_parallel (nthreads)	1136	max_parallel (int nthreads)
948	int nthreads
949	PROTOTYPE: $	1137	PROTOTYPE: $
950		1138
951	int	1139	int
952	max_outstanding (nreqs)	1140	max_outstanding (int maxreqs)
953	int nreqs	1141	PROTOTYPE: $
954	PROTOTYPE: $
955	CODE:	1142	CODE:
956	RETVAL = max_outstanding;	1143	RETVAL = max_outstanding;
957	max_outstanding = nreqs;	1144	max_outstanding = maxreqs;
		1145	OUTPUT:
		1146	RETVAL
958		1147
959	void	1148	void
960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
961	SV * pathname	1150	SV * pathname
962	int flags	1151	int flags
…		…
1177		1366
1178	REQ_SEND;	1367	REQ_SEND;
1179	}	1368	}
1180		1369
1181	void	1370	void
1182	aio_sleep (delay,callback=&PL_sv_undef)	1371	aio_busy (delay,callback=&PL_sv_undef)
1183	double delay	1372	double delay
1184	SV * callback	1373	SV * callback
1185	PPCODE:	1374	PPCODE:
1186	{	1375	{
1187	dREQ;	1376	dREQ;
1188		1377
1189	req->type = REQ_SLEEP;	1378	req->type = REQ_BUSY;
1190	req->fd = delay < 0. ? 0 : delay;	1379	req->fd = delay < 0. ? 0 : delay;
1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1192		1381
1193	REQ_SEND;	1382	REQ_SEND;
1194	}	1383	}
…		…
1198	SV * callback	1387	SV * callback
1199	PROTOTYPE: ;$	1388	PROTOTYPE: ;$
1200	PPCODE:	1389	PPCODE:
1201	{	1390	{
1202	dREQ;	1391	dREQ;
		1392
1203	req->type = REQ_GROUP;	1393	req->type = REQ_GROUP;
1204	req_send (req);	1394	req_send (req);
		1395
1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1206	}	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;
1207		1432
1208	void	1433	void
1209	flush ()	1434	flush ()
1210	PROTOTYPE:	1435	PROTOTYPE:
1211	CODE:	1436	CODE:
1212	while (nreqs)	1437	while (nreqs)
1213	{	1438	{
1214	poll_wait ();	1439	poll_wait ();
1215	poll_cb ();	1440	poll_cb (0);
1216	}	1441	}
1217		1442
1218	void	1443	void
1219	poll()	1444	poll()
1220	PROTOTYPE:	1445	PROTOTYPE:
1221	CODE:	1446	CODE:
1222	if (nreqs)	1447	if (nreqs)
1223	{	1448	{
1224	poll_wait ();	1449	poll_wait ();
1225	poll_cb ();	1450	poll_cb (0);
1226	}	1451	}
1227		1452
1228	int	1453	int
1229	poll_fileno()	1454	poll_fileno()
1230	PROTOTYPE:	1455	PROTOTYPE:
…		…
1235		1460
1236	int	1461	int
1237	poll_cb(...)	1462	poll_cb(...)
1238	PROTOTYPE:	1463	PROTOTYPE:
1239	CODE:	1464	CODE:
1240	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);
1241	OUTPUT:	1474	OUTPUT:
1242	RETVAL	1475	RETVAL
1243		1476
1244	void	1477	void
1245	poll_wait()	1478	poll_wait()
…		…
1254	CODE:	1487	CODE:
1255	RETVAL = nreqs;	1488	RETVAL = nreqs;
1256	OUTPUT:	1489	OUTPUT:
1257	RETVAL	1490	RETVAL
1258		1491
1259	PROTOTYPES: DISABLE	1492	int
1260		1493	nready()
1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1262
1263	void
1264	cancel (aio_req_ornot req)
1265	PROTOTYPE:	1494	PROTOTYPE:
1266	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:
1267	req_cancel (req);	1519	req_cancel (req);
		1520
		1521	void
		1522	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1523	CODE:
		1524	SvREFCNT_dec (req->callback);
		1525	req->callback = newSVsv (callback);
1268		1526
1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1270		1528
1271	void	1529	void
1272	add (aio_req grp, ...)	1530	add (aio_req grp, ...)
1273	PPCODE:	1531	PPCODE:
1274	{	1532	{
1275	int i;	1533	int i;
		1534	aio_req req;
1276		1535
1277	if (grp->fd == 2)	1536	if (grp->fd == 2)
1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1537	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1279		1538
1280	for (i = 1; i < items; ++i )	1539	for (i = 1; i < items; ++i )
1281	{	1540	{
1282	if (GIMME_V != G_VOID)	1541	if (GIMME_V != G_VOID)
1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1284		1543
1285	aio_req req = SvAIO_REQ (ST (i));	1544	req = SvAIO_REQ (ST (i));
1286		1545
1287	if (req)	1546	if (req)
1288	{	1547	{
1289	++grp->length;	1548	++grp->length;
1290	req->grp = grp;	1549	req->grp = grp;
…		…
1299	}	1558	}
1300	}	1559	}
1301	}	1560	}
1302		1561
1303	void	1562	void
		1563	cancel_subs (aio_req_ornot req)
		1564	CODE:
		1565	req_cancel_subs (req);
		1566
		1567	void
1304	result (aio_req grp, ...)	1568	result (aio_req grp, ...)
1305	CODE:	1569	CODE:
1306	{	1570	{
1307	int i;	1571	int i;
1308	AV *av = newAV ();	1572	AV *av;
1309		1573
		1574	grp->errorno = errno;
		1575
		1576	av = newAV ();
		1577
1310	for (i = 1; i < items; ++i )	1578	for (i = 1; i < items; ++i )
1311	av_push (av, newSVsv (ST (i)));	1579	av_push (av, newSVsv (ST (i)));
1312		1580
1313	SvREFCNT_dec (grp->data);	1581	SvREFCNT_dec (grp->data);
1314	grp->data = (SV *)av;	1582	grp->data = (SV *)av;
1315	}	1583	}
1316		1584
1317	void	1585	void
		1586	errno (aio_req grp, int errorno = errno)
		1587	CODE:
		1588	grp->errorno = errorno;
		1589
		1590	void
1318	feeder_limit (aio_req grp, int limit)	1591	limit (aio_req grp, int limit)
1319	CODE:	1592	CODE:
1320	grp->fd2 = limit;	1593	grp->fd2 = limit;
1321	aio_grp_feed (grp);	1594	aio_grp_feed (grp);
1322		1595
1323	void	1596	void
1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1597	feed (aio_req grp, SV *callback=&PL_sv_undef)
1325	CODE:	1598	CODE:
1326	{	1599	{
1327	SvREFCNT_dec (grp->fh2);	1600	SvREFCNT_dec (grp->fh2);
1328	grp->fh2 = newSVsv (callback);	1601	grp->fh2 = newSVsv (callback);
1329		1602

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