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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 1.84 by root, Sat Oct 28 01:24:19 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"
…		…
34	# else	43	# else
35	# error sendfile support requested but not available	44	# error sendfile support requested but not available
36	# endif	45	# endif
37	#endif	46	#endif
38		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
39	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	52	#ifndef NAME_MAX
41	# define NAME_MAX 4096	53	# define NAME_MAX 4096
42	#endif	54	#endif
43		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
44	#if __ia64	61	#if __ia64
45	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	65	#else
47	# define STACKSIZE 8192	66	# define STACKSIZE 16384
		67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDREAD_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDREAD_UNSAFE 0
		76	# else
		77	# define WORDREAD_UNSAFE 1
48	#endif	78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
49		91
50	enum {	92	enum {
51	REQ_QUIT,	93	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	96	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	102	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	103	REQ_BUSY,
62	};	104	};
63		105
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		108
67	typedef struct aio_cb	109	typedef struct aio_cb
68	{	110	{
69	struct aio_cb *volatile next;	111	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		112
75	SV *data, *callback;	113	SV *data, *callback;
76	SV *fh, *fh2;	114	SV *fh, *fh2;
77	void *dataptr, *data2ptr;	115	void *dataptr, *data2ptr;
78	Stat_t *statdata;	116	Stat_t *statdata;
79	off_t offset;	117	off_t offset;
80	size_t length;	118	size_t length;
81	ssize_t result;	119	ssize_t result;
82		120
		121	STRLEN dataoffset;
83	int type;	122	int type;
84	int fd, fd2;	123	int fd, fd2;
85	int errorno;	124	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	125	mode_t mode; /* open */
		126
88	unsigned char cancelled;	127	unsigned char flags;
		128	unsigned char pri;
		129
		130	SV *self; /* the perl counterpart of this request, if any */
		131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
89	} aio_cb;	132	} aio_cb;
		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	};
90		137
91	typedef aio_cb *aio_req;	138	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	139	typedef aio_cb *aio_req_ornot;
93		140
		141	enum {
		142	PRI_MIN = -4,
		143	PRI_MAX = 4,
		144
		145	DEFAULT_PRI = 0,
		146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		148	};
		149
		150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		151
94	static int started, wanted;	152	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	153
96	static int max_outstanding = 1<<30;	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
		203	static volatile unsigned int nreqs, nready, npending;
		204	static volatile unsigned int max_idle = 4;
		205	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	206	static int respipe [2];
98		207
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		211
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		213
		214	static unsigned int get_nready ()
		215	{
		216	unsigned int retval;
		217
		218	LOCK (reqlock);
		219	retval = nready;
		220	UNLOCK (reqlock);
		221
		222	return retval;
		223	}
		224
		225	static unsigned int get_npending ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reslock);
		230	retval = npending;
		231	UNLOCK (reslock);
		232
		233	return retval;
		234	}
		235
		236	#else
		237
		238	# define get_nready() nready
		239	# define get_npending() npending
		240
		241	#endif
		242
		243	/*
		244	* a somewhat faster data structure might be nice, but
		245	* with 8 priorities this actually needs <20 insns
		246	* per shift, the most expensive operation.
		247	*/
		248	typedef struct {
		249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		250	int size;
		251	} reqq;
		252
		253	static reqq req_queue;
		254	static reqq res_queue;
		255
		256	int reqq_push (reqq *q, aio_req req)
		257	{
		258	int pri = req->pri;
		259	req->next = 0;
		260
		261	if (q->qe[pri])
		262	{
		263	q->qe[pri]->next = req;
		264	q->qe[pri] = req;
		265	}
		266	else
		267	q->qe[pri] = q->qs[pri] = req;
		268
		269	return q->size++;
		270	}
		271
		272	aio_req reqq_shift (reqq *q)
		273	{
		274	int pri;
		275
		276	if (!q->size)
		277	return 0;
		278
		279	--q->size;
		280
		281	for (pri = NUM_PRI; pri--; )
		282	{
		283	aio_req req = q->qs[pri];
		284
		285	if (req)
		286	{
		287	if (!(q->qs[pri] = req->next))
		288	q->qe[pri] = 0;
		289
		290	return req;
		291	}
		292	}
		293
		294	abort ();
		295	}
		296
		297	static int poll_cb (int max);
		298	static void req_invoke (aio_req req);
106	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
107		301
108	/* must be called at most once */	302	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
110	{	304	{
111	if (!req->self)	305	if (!req->self)
…		…
117	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
118	}	312	}
119		313
120	static aio_req SvAIO_REQ (SV *sv)	314	static aio_req SvAIO_REQ (SV *sv)
121	{	315	{
		316	MAGIC *mg;
		317
122	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
123	croak ("object of class " AIO_REQ_KLASS " expected");	319	croak ("object of class " AIO_REQ_KLASS " expected");
124		320
125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
126		322
127	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
128	}	324	}
129		325
130	static void aio_grp_feed (aio_req grp)	326	static void aio_grp_feed (aio_req grp)
131	{	327	{
132	while (grp->length < grp->fd2)	328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
133	{	329	{
134	int old_len = grp->length;	330	int old_len = grp->length;
135		331
136	if (grp->fh2 && SvOK (grp->fh2))	332	if (grp->fh2 && SvOK (grp->fh2))
137	{	333	{
…		…
140	ENTER;	336	ENTER;
141	SAVETMPS;	337	SAVETMPS;
142	PUSHMARK (SP);	338	PUSHMARK (SP);
143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
144	PUTBACK;	340	PUTBACK;
145	call_sv (grp->fh2, G_VOID | G_EVAL);	341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
146	SPAGAIN;	342	SPAGAIN;
147	FREETMPS;	343	FREETMPS;
148	LEAVE;	344	LEAVE;
149	}	345	}
150		346
…		…
156	break;	352	break;
157	}	353	}
158	}	354	}
159	}	355	}
160		356
161	static void poll_wait ()	357	static void aio_grp_dec (aio_req grp)
162	{	358	{
163	if (nreqs && !ress)	359	--grp->length;
164	{
165	fd_set rfd;
166	FD_ZERO(&rfd);
167	FD_SET(respipe [0], &rfd);
168		360
169	select (respipe [0] + 1, &rfd, 0, 0, 0);	361	/* call feeder, if applicable */
		362	aio_grp_feed (grp);
		363
		364	/* finish, if done */
		365	if (!grp->length && grp->fd)
		366	{
		367	req_invoke (grp);
		368	req_free (grp);
170	}	369	}
171	}	370	}
172		371
173	static void req_invoke (aio_req req)	372	static void req_invoke (aio_req req)
174	{	373	{
175	dSP;	374	dSP;
176	int errorno = errno;
177		375
178	if (req->cancelled || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
179	return;	377	{
180
181	errno = req->errorno;
182
183	ENTER;	378	ENTER;
184	SAVETMPS;	379	SAVETMPS;
185	PUSHMARK (SP);	380	PUSHMARK (SP);
186	EXTEND (SP, 1);	381	EXTEND (SP, 1);
187		382
188	switch (req->type)	383	switch (req->type)
189	{
190	case REQ_READDIR:
191	{	384	{
192	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
193
194	if (req->result >= 0)
195	{	386	{
196	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
197	AV *av = newAV ();
198		388
199	while (req->result)	389	if (req->result >= 0)
200	{	390	{
		391	int i;
		392	char *buf = req->data2ptr;
		393	AV *av = newAV ();
		394
		395	av_extend (av, req->result - 1);
		396
		397	for (i = 0; i < req->result; ++i)
		398	{
201	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
202		400
203	av_push (av, sv);	401	av_store (av, i, sv);
204	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
205	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}	406	}
207		407
208	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
209	}	409	}
		410	break;
210		411
211	PUSHs (rv);	412	case REQ_OPEN:
		413	{
		414	/* convert fd to fh */
		415	SV *fh;
		416
		417	PUSHs (sv_2mortal (newSViv (req->result)));
		418	PUTBACK;
		419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		420	SPAGAIN;
		421
		422	fh = SvREFCNT_inc (POPs);
		423
		424	PUSHMARK (SP);
		425	XPUSHs (sv_2mortal (fh));
		426	}
		427	break;
		428
		429	case REQ_GROUP:
		430	req->fd = 2; /* mark group as finished */
		431
		432	if (req->data)
		433	{
		434	int i;
		435	AV *av = (AV *)req->data;
		436
		437	EXTEND (SP, AvFILL (av) + 1);
		438	for (i = 0; i <= AvFILL (av); ++i)
		439	PUSHs (*av_fetch (av, i, 0));
		440	}
		441	break;
		442
		443	case REQ_NOP:
		444	case REQ_BUSY:
		445	break;
		446
		447	default:
		448	PUSHs (sv_2mortal (newSViv (req->result)));
		449	break;
212	}	450	}
213	break;
214		451
215	case REQ_OPEN:	452	errno = req->errorno;
216	{
217	/* convert fd to fh */
218	SV *fh;
219		453
220	PUSHs (sv_2mortal (newSViv (req->result)));
221	PUTBACK;	454	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);	455	call_sv (req->callback, G_VOID | G_EVAL);
257	SPAGAIN;	456	SPAGAIN;
258		457
259	if (SvTRUE (ERRSV))
260	{
261	req_free (req);
262	croak (0);
263	}
264
265	FREETMPS;	458	FREETMPS;
266	LEAVE;	459	LEAVE;
		460	}
267		461
268	errno = errorno;
269	}
270
271	static void req_free (aio_req req)
272	{
273	if (req->grp)	462	if (req->grp)
274	{	463	{
275	aio_req grp = req->grp;	464	aio_req grp = req->grp;
276		465
277	/* unlink request */	466	/* unlink request */
…		…
279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;	468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
280		469
281	if (grp->grp_first == req)	470	if (grp->grp_first == req)
282	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
283		472
284	--grp->length;
285
286	/* call feeder, if applicable */
287	aio_grp_feed (grp);	473	aio_grp_dec (grp);
		474	}
288		475
289	/* finish, if done */	476	if (SvTRUE (ERRSV))
290	if (!grp->length && grp->fd)	477	{
291	{
292	req_invoke (grp);
293	req_free (grp);	478	req_free (req);
294	}	479	croak (0);
295	}	480	}
		481	}
296		482
		483	static void req_free (aio_req req)
		484	{
297	if (req->self)	485	if (req->self)
298	{	486	{
299	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
300	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
301	}	489	}
…		…
304	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
305	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
306	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
307	Safefree (req->statdata);	495	Safefree (req->statdata);
308		496
309	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
310	free (req->data2ptr);	498	free (req->data2ptr);
311		499
312	Safefree (req);	500	Safefree (req);
313	}	501	}
314		502
		503	static void req_cancel_subs (aio_req grp)
		504	{
		505	aio_req sub;
		506
		507	if (grp->type != REQ_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->fh2);
		511	grp->fh2 = 0;
		512
		513	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		514	req_cancel (sub);
		515	}
		516
315	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
316	{	518	{
317	req->cancelled = 1;	519	req->flags |= FLAG_CANCELLED;
318		520
319	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
320	{	522	}
321	aio_req sub;
322		523
323	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
324	req_cancel (sub);	525
		526	static void start_thread (void)
		527	{
		528	sigset_t fullsigset, oldsigset;
		529	pthread_attr_t attr;
		530
		531	worker *wrk = calloc (1, sizeof (worker));
		532
		533	if (!wrk)
		534	croak ("unable to allocate worker thread data");
		535
		536	pthread_attr_init (&attr);
		537	pthread_attr_setstacksize (&attr, STACKSIZE);
		538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		539	#ifdef PTHREAD_SCOPE_PROCESS
		540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		541	#endif
		542
		543	sigfillset (&fullsigset);
		544
		545	LOCK (wrklock);
		546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		547
		548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
325	}	549	{
326	}	550	wrk->prev = &wrk_first;
		551	wrk->next = wrk_first.next;
		552	wrk_first.next->prev = wrk;
		553	wrk_first.next = wrk;
		554	++started;
		555	}
		556	else
		557	free (wrk);
327		558
		559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		560	UNLOCK (wrklock);
		561	}
		562
		563	static void maybe_start_thread ()
		564	{
		565	if (started >= wanted)
		566	return;
		567
		568	/* todo: maybe use idle here, but might be less exact */
		569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
		570	return;
		571
		572	start_thread ();
		573	}
		574
		575	static void req_send (aio_req req)
		576	{
		577	++nreqs;
		578
		579	LOCK (reqlock);
		580	++nready;
		581	reqq_push (&req_queue, req);
		582	pthread_cond_signal (&reqwait);
		583	UNLOCK (reqlock);
		584
		585	maybe_start_thread ();
		586	}
		587
		588	static void end_thread (void)
		589	{
		590	aio_req req;
		591
		592	Newz (0, req, 1, aio_cb);
		593
		594	req->type = REQ_QUIT;
		595	req->pri = PRI_MAX + PRI_BIAS;
		596
		597	LOCK (reqlock);
		598	reqq_push (&req_queue, req);
		599	pthread_cond_signal (&reqwait);
		600	UNLOCK (reqlock);
		601
		602	LOCK (wrklock);
		603	--started;
		604	UNLOCK (wrklock);
		605	}
		606
		607	static void min_parallel (int nthreads)
		608	{
		609	if (wanted < nthreads)
		610	wanted = nthreads;
		611	}
		612
		613	static void max_parallel (int nthreads)
		614	{
		615	if (wanted > nthreads)
		616	wanted = nthreads;
		617
		618	while (started > wanted)
		619	end_thread ();
		620	}
		621
		622	static void poll_wait ()
		623	{
		624	fd_set rfd;
		625
		626	while (nreqs)
		627	{
		628	int size;
		629	if (WORDREAD_UNSAFE) LOCK (reslock);
		630	size = res_queue.size;
		631	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		632
		633	if (size)
		634	return;
		635
		636	maybe_start_thread ();
		637
		638	FD_ZERO(&rfd);
		639	FD_SET(respipe [0], &rfd);
		640
		641	select (respipe [0] + 1, &rfd, 0, 0, 0);
		642	}
		643	}
		644
328	static int poll_cb ()	645	static int poll_cb (int max)
329	{	646	{
330	dSP;	647	dSP;
331	int count = 0;	648	int count = 0;
332	int do_croak = 0;	649	int do_croak = 0;
333	aio_req req;	650	aio_req req;
334		651
335	for (;;)	652	for (;;)
336	{	653	{
337	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
338	req = ress;
339
340	if (req)
341	{	655	{
342	ress = req->next;	656	maybe_start_thread ();
343		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
344	if (!ress)	661	if (req)
345	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
346	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
347	char buf [32];	668	char buf [32];
348	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
349	;	671	}
350
351	rese = 0;
352	}	672	}
		673
		674	UNLOCK (reslock);
		675
		676	if (!req)
		677	break;
		678
		679	--nreqs;
		680
		681	if (req->type == REQ_GROUP && req->length)
		682	{
		683	req->fd = 1; /* mark request as delayed */
		684	continue;
		685	}
		686	else
		687	{
		688	if (req->type == REQ_READ)
		689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		690
		691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		692	SvREADONLY_off (req->data);
		693
		694	if (req->statdata)
		695	{
		696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		697	PL_laststatval = req->result;
		698	PL_statcache = *(req->statdata);
		699	}
		700
		701	req_invoke (req);
		702
		703	count++;
		704	}
		705
		706	req_free (req);
353	}	707	}
354		708
355	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
356
357	if (!req)
358	break;	710	break;
359		711
360	nreqs--;	712	poll_wait ();
361		713
362	if (req->type == REQ_QUIT)	714	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	}	715	}
391		716
392	return count;	717	return count;
393	}
394
395	static void *aio_proc(void *arg);
396
397	static void start_thread (void)
398	{
399	sigset_t fullsigset, oldsigset;
400	pthread_t tid;
401	pthread_attr_t attr;
402
403	pthread_attr_init (&attr);
404	pthread_attr_setstacksize (&attr, STACKSIZE);
405	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
406
407	sigfillset (&fullsigset);
408	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
409
410	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
411	started++;
412
413	sigprocmask (SIG_SETMASK, &oldsigset, 0);
414	}
415
416	static void req_send (aio_req req)
417	{
418	while (started < wanted && nreqs >= started)
419	start_thread ();
420
421	nreqs++;
422
423	pthread_mutex_lock (&reqlock);
424
425	req->next = 0;
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);
436	pthread_mutex_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	}
449
450	static void end_thread (void)
451	{
452	aio_req req;
453	Newz (0, req, 1, aio_cb);
454	req->type = REQ_QUIT;
455
456	req_send (req);
457	}
458
459	static void min_parallel (int nthreads)
460	{
461	if (wanted < nthreads)
462	wanted = nthreads;
463	}
464
465	static void max_parallel (int nthreads)
466	{
467	int cur = started;
468
469	if (wanted > nthreads)
470	wanted = nthreads;
471
472	while (cur > wanted)
473	{
474	end_thread ();
475	cur--;
476	}
477
478	while (started > wanted)
479	{
480	poll_wait ();
481	poll_cb ();
482	}
483	}	718	}
484		719
485	static void create_pipe ()	720	static void create_pipe ()
486	{	721	{
487	if (pipe (respipe))	722	if (pipe (respipe))
…		…
511	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
512	{	747	{
513	ssize_t res;	748	ssize_t res;
514	off_t ooffset;	749	off_t ooffset;
515		750
516	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
517	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
518	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
519	res = read (fd, buf, count);	754	res = read (fd, buf, count);
520	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
521	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
522		757
523	return res;	758	return res;
524	}	759	}
525		760
526	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
527	{	762	{
528	ssize_t res;	763	ssize_t res;
529	off_t ooffset;	764	off_t ooffset;
530		765
531	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
532	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
533	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
534	res = write (fd, buf, count);	769	res = write (fd, buf, count);
535	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
536	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
537		772
538	return res;	773	return res;
539	}	774	}
540	#endif	775	#endif
541		776
542	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
543	# define fdatasync fsync	778	# define fdatasync fsync
544	#endif	779	#endif
545		780
546	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
547	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
548		783
549	static ssize_t readahead (int fd, off_t offset, size_t count)	784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
550	{	785	{
551	char readahead_buf[4096];	786	dBUF;
552		787
553	while (count > 0)	788	while (count > 0)
554	{	789	{
555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
556		791
557	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
558	offset += len;	793	offset += len;
559	count -= len;	794	count -= len;
560	}	795	}
561		796
562	errno = 0;	797	errno = 0;
563	}	798	}
		799
564	#endif	800	#endif
565		801
566	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
567	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
568		804
…		…
571	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
572	{	808	{
573	struct dirent *e;	809	struct dirent *e;
574	int errorno;	810	int errorno;
575		811
576	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
577		813
578	e = readdir (dirp);	814	e = readdir (dirp);
579	errorno = errno;	815	errorno = errno;
580		816
581	if (e)	817	if (e)
…		…
584	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
585	}	821	}
586	else	822	else
587	*res = 0;	823	*res = 0;
588		824
589	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
590		826
591	errno = errorno;	827	errno = errorno;
592	return e ? 0 : -1;	828	return e ? 0 : -1;
593	}	829	}
594	#endif	830	#endif
595		831
596	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
597	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
598	{	834	{
599	ssize_t res;	835	ssize_t res;
600		836
601	if (!count)	837	if (!count)
602	return 0;	838	return 0;
…		…
613	{	849	{
614	off_t sbytes;	850	off_t sbytes;
615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
616		852
617	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
619	res = sbytes;	855	res = sbytes;
620	}	856	}
621		857
622	# elif __hpux	858	# elif __hpux
623	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
651	#endif	887	#endif
652	)	888	)
653	)	889	)
654	{	890	{
655	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
656	char buf[4096];	892	dBUF;
		893
657	res = 0;	894	res = 0;
658		895
659	while (count)	896	while (count)
660	{	897	{
661	ssize_t cnt;	898	ssize_t cnt;
662		899
663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
664		901
665	if (cnt <= 0)	902	if (cnt <= 0)
666	{	903	{
667	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
668	break;	905	break;
669	}	906	}
670		907
671	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
672		909
673	if (cnt <= 0)	910	if (cnt <= 0)
674	{	911	{
675	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
676	break;	913	break;
…		…
684		921
685	return res;	922	return res;
686	}	923	}
687		924
688	/* read a full directory */	925	/* read a full directory */
689	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
690	{	927	{
691	DIR *dirp = opendir (path);	928	DIR *dirp;
692	union	929	union
693	{	930	{
694	struct dirent d;	931	struct dirent d;
695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
696	} u;	933	} *u;
697	struct dirent *entp;	934	struct dirent *entp;
698	char *name, *names;	935	char *name, *names;
699	int memlen = 4096;	936	int memlen = 4096;
700	int memofs = 0;	937	int memofs = 0;
701	int res = 0;	938	int res = 0;
702	int errorno;	939	int errorno;
703		940
704	if (!dirp)	941	LOCK (wrklock);
705	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
706		943	self->dbuf = u = malloc (sizeof (*u));
707	names = malloc (memlen);	944	req->data2ptr = names = malloc (memlen);
		945	UNLOCK (wrklock);
		946
		947	if (dirp && u && names)
		948	for (;;)
		949	{
		950	errno = 0;
		951	readdir_r (dirp, &u->d, &entp);
		952
		953	if (!entp)
		954	break;
		955
		956	name = entp->d_name;
		957
		958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		959	{
		960	int len = strlen (name) + 1;
		961
		962	res++;
		963
		964	while (memofs + len > memlen)
		965	{
		966	memlen *= 2;
		967	LOCK (wrklock);
		968	req->data2ptr = names = realloc (names, memlen);
		969	UNLOCK (wrklock);
		970
		971	if (!names)
		972	break;
		973	}
		974
		975	memcpy (names + memofs, name, len);
		976	memofs += len;
		977	}
		978	}
		979
		980	if (errno)
		981	res = -1;
		982
		983	req->result = res;
		984	}
		985
		986	/*****************************************************************************/
		987
		988	static void *aio_proc (void *thr_arg)
		989	{
		990	aio_req req;
		991	struct timespec ts;
		992	worker *self = (worker *)thr_arg;
		993
		994	/* try to distribute timeouts somewhat evenly */
		995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		996	* (1000000000UL / 1024UL);
708		997
709	for (;;)	998	for (;;)
710	{	999	{
711	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
712		1001
713	if (!entp)	1002	LOCK (reqlock);
714	break;
715
716	name = entp->d_name;
717
718	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
719	{
720	int len = strlen (name) + 1;
721
722	res++;
723
724	while (memofs + len > memlen)
725	{
726	memlen *= 2;
727	names = realloc (names, memlen);
728	if (!names)
729	break;
730	}
731
732	memcpy (names + memofs, name, len);
733	memofs += len;
734	}
735	}
736
737	errorno = errno;
738	closedir (dirp);
739
740	if (errorno)
741	{
742	free (names);
743	errno = errorno;
744	res = -1;
745	}
746
747	*namesp = (void *)names;
748	return res;
749	}
750
751	/*****************************************************************************/
752
753	static void *aio_proc (void *thr_arg)
754	{
755	aio_req req;
756	int type;
757
758	do
759	{
760	pthread_mutex_lock (&reqlock);
761		1003
762	for (;;)	1004	for (;;)
763	{	1005	{
764	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
765
766	if (reqs)
767	{
768	reqs = reqs->next;
769	if (!reqs) reqe = 0;
770	}
771		1007
772	if (req)	1008	if (req)
773	break;	1009	break;
774		1010
		1011	++idle;
		1012
		1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1014	== ETIMEDOUT)
		1015	{
		1016	if (idle > max_idle)
		1017	{
		1018	--idle;
		1019	UNLOCK (reqlock);
		1020	LOCK (wrklock);
		1021	--started;
		1022	UNLOCK (wrklock);
		1023	goto quit;
		1024	}
		1025
		1026	/* we are allowed to idle, so do so without any timeout */
775	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
776	}	1032	}
777		1033
778	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
779		1037
780	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
781		1039
782	if (!req->cancelled)	1040	if (!(req->flags & FLAG_CANCELLED))
783	switch (req->type)	1041	switch (req->type)
784	{	1042	{
785	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1043	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;	1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
787		1045
788	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1046	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;	1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
790		1048
791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
794		1052
…		…
797	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
798	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
799	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
802		1061
803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
804	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
806		1065
807	case REQ_SLEEP:	1066	case REQ_BUSY:
808	{	1067	{
809	struct timeval tv;	1068	struct timeval tv;
810		1069
811	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
812	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
813		1072
814	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
815	}	1074	}
816		1075
		1076	case REQ_GROUP:
		1077	case REQ_NOP:
		1078	break;
		1079
817	case REQ_QUIT:	1080	case REQ_QUIT:
818	break;	1081	goto quit;
819		1082
820	default:	1083	default:
821	req->result = ENOSYS;	1084	req->result = ENOSYS;
822	break;	1085	break;
823	}	1086	}
824		1087
825	req->errorno = errno;	1088	req->errorno = errno;
826		1089
827	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
828		1091
829	req->next = 0;	1092	++npending;
830		1093
831	if (rese)	1094	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 */	1095	/* write a dummy byte to the pipe so fh becomes ready */
841	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
842	}
843		1097
844	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
845	}	1102	}
846	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
847		1108
848	return 0;	1109	return 0;
849	}	1110	}
850		1111
851	/*****************************************************************************/	1112	/*****************************************************************************/
852		1113
853	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
854	{	1115	{
855	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
856	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
857	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
858	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
859	#endif	1121	#endif
860	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
861	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
862	#endif	1124	#endif
863	}	1125	}
864		1126
865	static void atfork_parent (void)	1127	static void atfork_parent (void)
866	{	1128	{
867	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
868	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
869	#endif	1131	#endif
870	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
871	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
872	#endif	1134	#endif
873	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
874	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
875	}	1138	}
876		1139
877	static void atfork_child (void)	1140	static void atfork_child (void)
878	{	1141	{
879	aio_req prv;	1142	aio_req prv;
880		1143
		1144	while (prv = reqq_shift (&req_queue))
		1145	req_free (prv);
		1146
		1147	while (prv = reqq_shift (&res_queue))
		1148	req_free (prv);
		1149
		1150	while (wrk_first.next != &wrk_first)
		1151	{
		1152	worker *wrk = wrk_first.next;
		1153
		1154	if (wrk->req)
		1155	req_free (wrk->req);
		1156
		1157	worker_clear (wrk);
		1158	worker_free (wrk);
		1159	}
		1160
881	started = 0;	1161	started = 0;
882		1162	idle = 0;
883	while (reqs)	1163	nreqs = 0;
884	{	1164	nready = 0;
885	prv = reqs;	1165	npending = 0;
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		1166
901	close (respipe [0]);	1167	close (respipe [0]);
902	close (respipe [1]);	1168	close (respipe [1]);
903	create_pipe ();	1169	create_pipe ();
904		1170
905	atfork_parent ();	1171	atfork_parent ();
906	}	1172	}
907		1173
908	#define dREQ \	1174	#define dREQ \
909	aio_req req; \	1175	aio_req req; \
		1176	int req_pri = next_pri; \
		1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
910	\	1178	\
911	if (SvOK (callback) && !SvROK (callback)) \	1179	if (SvOK (callback) && !SvROK (callback)) \
912	croak ("callback must be undef or of reference type"); \	1180	croak ("callback must be undef or of reference type"); \
913	\	1181	\
914	Newz (0, req, 1, aio_cb); \	1182	Newz (0, req, 1, aio_cb); \
915	if (!req) \	1183	if (!req) \
916	croak ("out of memory during aio_req allocation"); \	1184	croak ("out of memory during aio_req allocation"); \
917	\	1185	\
918	req->callback = newSVsv (callback)	1186	req->callback = newSVsv (callback); \
		1187	req->pri = req_pri
919		1188
920	#define REQ_SEND \	1189	#define REQ_SEND \
921	req_send (req); \	1190	req_send (req); \
922	\	1191	\
923	if (GIMME_V != G_VOID) \	1192	if (GIMME_V != G_VOID) \
…		…
928	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
929		1198
930	BOOT:	1199	BOOT:
931	{	1200	{
932	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
933	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
934	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
935	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
936		1209
937	create_pipe ();	1210	create_pipe ();
938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
939	}	1212	}
940		1213
941	void	1214	void
942	min_parallel (nthreads)	1215	min_parallel (int nthreads)
943	int nthreads
944	PROTOTYPE: $	1216	PROTOTYPE: $
945		1217
946	void	1218	void
947	max_parallel (nthreads)	1219	max_parallel (int nthreads)
948	int nthreads
949	PROTOTYPE: $	1220	PROTOTYPE: $
950		1221
951	int	1222	int
952	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
953	int nreqs	1224	PROTOTYPE: $
954	PROTOTYPE: $
955	CODE:	1225	CODE:
956	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
957	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
958		1230
959	void	1231	void
960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
961	SV * pathname	1233	SV * pathname
962	int flags	1234	int flags
…		…
1177		1449
1178	REQ_SEND;	1450	REQ_SEND;
1179	}	1451	}
1180		1452
1181	void	1453	void
		1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1455	SV * pathname
		1456	SV * callback
		1457	UV mode
		1458	UV dev
		1459	PPCODE:
		1460	{
		1461	dREQ;
		1462
		1463	req->type = REQ_MKNOD;
		1464	req->data = newSVsv (pathname);
		1465	req->dataptr = SvPVbyte_nolen (req->data);
		1466	req->mode = (mode_t)mode;
		1467	req->offset = dev;
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	void
1182	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1183	double delay	1474	double delay
1184	SV * callback	1475	SV * callback
1185	PPCODE:	1476	PPCODE:
1186	{	1477	{
1187	dREQ;	1478	dREQ;
1188		1479
1189	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1190	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1192		1483
1193	REQ_SEND;	1484	REQ_SEND;
1194	}	1485	}
…		…
1198	SV * callback	1489	SV * callback
1199	PROTOTYPE: ;$	1490	PROTOTYPE: ;$
1200	PPCODE:	1491	PPCODE:
1201	{	1492	{
1202	dREQ;	1493	dREQ;
		1494
1203	req->type = REQ_GROUP;	1495	req->type = REQ_GROUP;
1204	req_send (req);	1496	req_send (req);
		1497
1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1206	}	1499	}
		1500
		1501	void
		1502	aio_nop (callback=&PL_sv_undef)
		1503	SV * callback
		1504	PPCODE:
		1505	{
		1506	dREQ;
		1507
		1508	req->type = REQ_NOP;
		1509
		1510	REQ_SEND;
		1511	}
		1512
		1513	int
		1514	aioreq_pri (int pri = 0)
		1515	PROTOTYPE: ;$
		1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
		1520	if (pri < PRI_MIN) pri = PRI_MIN;
		1521	if (pri > PRI_MAX) pri = PRI_MAX;
		1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	void
		1528	aioreq_nice (int nice = 0)
		1529	CODE:
		1530	nice = next_pri - nice;
		1531	if (nice < PRI_MIN) nice = PRI_MIN;
		1532	if (nice > PRI_MAX) nice = PRI_MAX;
		1533	next_pri = nice + PRI_BIAS;
1207		1534
1208	void	1535	void
1209	flush ()	1536	flush ()
1210	PROTOTYPE:	1537	PROTOTYPE:
1211	CODE:	1538	CODE:
1212	while (nreqs)	1539	while (nreqs)
1213	{	1540	{
1214	poll_wait ();	1541	poll_wait ();
1215	poll_cb ();	1542	poll_cb (0);
1216	}	1543	}
1217		1544
1218	void	1545	void
1219	poll()	1546	poll()
1220	PROTOTYPE:	1547	PROTOTYPE:
1221	CODE:	1548	CODE:
1222	if (nreqs)	1549	if (nreqs)
1223	{	1550	{
1224	poll_wait ();	1551	poll_wait ();
1225	poll_cb ();	1552	poll_cb (0);
1226	}	1553	}
1227		1554
1228	int	1555	int
1229	poll_fileno()	1556	poll_fileno()
1230	PROTOTYPE:	1557	PROTOTYPE:
…		…
1235		1562
1236	int	1563	int
1237	poll_cb(...)	1564	poll_cb(...)
1238	PROTOTYPE:	1565	PROTOTYPE:
1239	CODE:	1566	CODE:
1240	RETVAL = poll_cb ();	1567	RETVAL = poll_cb (0);
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	poll_some(int max = 0)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = poll_cb (max);
1241	OUTPUT:	1576	OUTPUT:
1242	RETVAL	1577	RETVAL
1243		1578
1244	void	1579	void
1245	poll_wait()	1580	poll_wait()
…		…
1254	CODE:	1589	CODE:
1255	RETVAL = nreqs;	1590	RETVAL = nreqs;
1256	OUTPUT:	1591	OUTPUT:
1257	RETVAL	1592	RETVAL
1258		1593
1259	PROTOTYPES: DISABLE	1594	int
1260		1595	nready()
1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1262
1263	void
1264	cancel (aio_req_ornot req)
1265	PROTOTYPE:	1596	PROTOTYPE:
1266	CODE:	1597	CODE:
		1598	RETVAL = get_nready ();
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	int
		1603	npending()
		1604	PROTOTYPE:
		1605	CODE:
		1606	RETVAL = get_npending ();
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	PROTOTYPES: DISABLE
		1611
		1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1613
		1614	void
		1615	cancel (aio_req_ornot req)
		1616	CODE:
1267	req_cancel (req);	1617	req_cancel (req);
		1618
		1619	void
		1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1621	CODE:
		1622	SvREFCNT_dec (req->callback);
		1623	req->callback = newSVsv (callback);
1268		1624
1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1270		1626
1271	void	1627	void
1272	add (aio_req grp, ...)	1628	add (aio_req grp, ...)
1273	PPCODE:	1629	PPCODE:
1274	{	1630	{
1275	int i;	1631	int i;
		1632	aio_req req;
1276		1633
1277	if (grp->fd == 2)	1634	if (grp->fd == 2)
1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1279		1636
1280	for (i = 1; i < items; ++i )	1637	for (i = 1; i < items; ++i )
1281	{	1638	{
1282	if (GIMME_V != G_VOID)	1639	if (GIMME_V != G_VOID)
1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1284		1641
1285	aio_req req = SvAIO_REQ (ST (i));	1642	req = SvAIO_REQ (ST (i));
1286		1643
1287	if (req)	1644	if (req)
1288	{	1645	{
1289	++grp->length;	1646	++grp->length;
1290	req->grp = grp;	1647	req->grp = grp;
…		…
1299	}	1656	}
1300	}	1657	}
1301	}	1658	}
1302		1659
1303	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1304	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1305	CODE:	1667	CODE:
1306	{	1668	{
1307	int i;	1669	int i;
1308	AV *av = newAV ();	1670	AV *av;
1309		1671
		1672	grp->errorno = errno;
		1673
		1674	av = newAV ();
		1675
1310	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1311	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1312		1678
1313	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1314	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1315	}	1681	}
1316		1682
1317	void	1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
1318	feeder_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1319	CODE:	1690	CODE:
1320	grp->fd2 = limit;	1691	grp->fd2 = limit;
1321	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1322		1693
1323	void	1694	void
1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1695	feed (aio_req grp, SV *callback=&PL_sv_undef)
1325	CODE:	1696	CODE:
1326	{	1697	{
1327	SvREFCNT_dec (grp->fh2);	1698	SvREFCNT_dec (grp->fh2);
1328	grp->fh2 = newSVsv (callback);	1699	grp->fh2 = newSVsv (callback);
1329		1700

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