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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC vs.
Revision 1.85 by root, Sat Oct 28 23:32:29 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 WORDACCESS_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDACCESS_UNSAFE 0
		76	# else
		77	# define WORDACCESS_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 *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
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	#define AIO_TICKS ((1000000 + 1023) >> 10)
		151
		152	static unsigned int max_poll_time = 0;
		153	static unsigned int max_poll_reqs = 0;
		154
		155	/* calculcate time difference in ~1/AIO_TICKS of a second */
		156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		157	{
		158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		160	}
		161
		162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		163
94	static int started, wanted;	164	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	165
96	static int max_outstanding = 1<<30;	166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		168	#else
		169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		170	#endif
		171
		172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		174
		175	/* worker threads management */
		176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		177
		178	typedef struct worker {
		179	/* locked by wrklock */
		180	struct worker *prev, *next;
		181
		182	pthread_t tid;
		183
		184	/* locked by reslock, reqlock or wrklock */
		185	aio_req req; /* currently processed request */
		186	void *dbuf;
		187	DIR *dirp;
		188	} worker;
		189
		190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		191
		192	static void worker_clear (worker *wrk)
		193	{
		194	if (wrk->dirp)
		195	{
		196	closedir (wrk->dirp);
		197	wrk->dirp = 0;
		198	}
		199
		200	if (wrk->dbuf)
		201	{
		202	free (wrk->dbuf);
		203	wrk->dbuf = 0;
		204	}
		205	}
		206
		207	static void worker_free (worker *wrk)
		208	{
		209	wrk->next->prev = wrk->prev;
		210	wrk->prev->next = wrk->next;
		211
		212	free (wrk);
		213	}
		214
		215	static volatile unsigned int nreqs, nready, npending;
		216	static volatile unsigned int max_idle = 4;
		217	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	218	static int respipe [2];
98		219
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	221	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		223
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	224	#if WORDACCESS_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		225
		226	static unsigned int get_nready ()
		227	{
		228	unsigned int retval;
		229
		230	LOCK (reqlock);
		231	retval = nready;
		232	UNLOCK (reqlock);
		233
		234	return retval;
		235	}
		236
		237	static unsigned int get_npending ()
		238	{
		239	unsigned int retval;
		240
		241	LOCK (reslock);
		242	retval = npending;
		243	UNLOCK (reslock);
		244
		245	return retval;
		246	}
		247
		248	static unsigned int get_nthreads ()
		249	{
		250	unsigned int retval;
		251
		252	LOCK (wrklock);
		253	retval = started;
		254	UNLOCK (wrklock);
		255
		256	return retval;
		257	}
		258
		259	#else
		260
		261	# define get_nready() nready
		262	# define get_npending() npending
		263	# define get_nthreads() started
		264
		265	#endif
		266
		267	/*
		268	* a somewhat faster data structure might be nice, but
		269	* with 8 priorities this actually needs <20 insns
		270	* per shift, the most expensive operation.
		271	*/
		272	typedef struct {
		273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		274	int size;
		275	} reqq;
		276
		277	static reqq req_queue;
		278	static reqq res_queue;
		279
		280	int reqq_push (reqq *q, aio_req req)
		281	{
		282	int pri = req->pri;
		283	req->next = 0;
		284
		285	if (q->qe[pri])
		286	{
		287	q->qe[pri]->next = req;
		288	q->qe[pri] = req;
		289	}
		290	else
		291	q->qe[pri] = q->qs[pri] = req;
		292
		293	return q->size++;
		294	}
		295
		296	aio_req reqq_shift (reqq *q)
		297	{
		298	int pri;
		299
		300	if (!q->size)
		301	return 0;
		302
		303	--q->size;
		304
		305	for (pri = NUM_PRI; pri--; )
		306	{
		307	aio_req req = q->qs[pri];
		308
		309	if (req)
		310	{
		311	if (!(q->qs[pri] = req->next))
		312	q->qe[pri] = 0;
		313
		314	return req;
		315	}
		316	}
		317
		318	abort ();
		319	}
		320
		321	static int poll_cb ();
		322	static void req_invoke (aio_req req);
106	static void req_free (aio_req req);	323	static void req_free (aio_req req);
		324	static void req_cancel (aio_req req);
107		325
108	/* must be called at most once */	326	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	327	static SV *req_sv (aio_req req, const char *klass)
110	{	328	{
		329	if (!req->self)
		330	{
111	req->self = (SV *)newHV ();	331	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	332	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		333	}
113		334
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	335	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	336	}
116		337
117	static aio_req SvAIO_REQ (SV *sv)	338	static aio_req SvAIO_REQ (SV *sv)
118	{	339	{
		340	MAGIC *mg;
		341
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	342	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	343	croak ("object of class " AIO_REQ_KLASS " expected");
121		344
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	345	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		346
124	return mg ? (aio_req)mg->mg_ptr : 0;	347	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	348	}
126		349
127	static void poll_wait ()	350	static void aio_grp_feed (aio_req grp)
128	{	351	{
129	if (nreqs && !ress)	352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		353	{
		354	int old_len = grp->length;
		355
		356	if (grp->fh2 && SvOK (grp->fh2))
		357	{
		358	dSP;
		359
		360	ENTER;
		361	SAVETMPS;
		362	PUSHMARK (SP);
		363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		364	PUTBACK;
		365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		366	SPAGAIN;
		367	FREETMPS;
		368	LEAVE;
		369	}
		370
		371	/* stop if no progress has been made */
		372	if (old_len == grp->length)
		373	{
		374	SvREFCNT_dec (grp->fh2);
		375	grp->fh2 = 0;
		376	break;
		377	}
130	{	378	}
131	fd_set rfd;	379	}
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		380
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	381	static void aio_grp_dec (aio_req grp)
		382	{
		383	--grp->length;
		384
		385	/* call feeder, if applicable */
		386	aio_grp_feed (grp);
		387
		388	/* finish, if done */
		389	if (!grp->length && grp->fd)
		390	{
		391	req_invoke (grp);
		392	req_free (grp);
136	}	393	}
137	}	394	}
138		395
139	static void req_invoke (aio_req req)	396	static void req_invoke (aio_req req)
140	{	397	{
141	dSP;	398	dSP;
142	int errorno = errno;
143		399
144	if (req->cancelled || !SvOK (req->callback))	400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
145	return;	401	{
146
147	errno = req->errorno;
148
149	ENTER;	402	ENTER;
		403	SAVETMPS;
150	PUSHMARK (SP);	404	PUSHMARK (SP);
151	EXTEND (SP, 1);	405	EXTEND (SP, 1);
152		406
153	switch (req->type)	407	switch (req->type)
154	{
155	case REQ_READDIR:
156	{	408	{
157	SV *rv = &PL_sv_undef;	409	case REQ_READDIR:
158
159	if (req->result >= 0)
160	{	410	{
161	char *buf = req->data2ptr;	411	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		412
164	while (req->result)	413	if (req->result >= 0)
165	{	414	{
		415	int i;
		416	char *buf = req->data2ptr;
		417	AV *av = newAV ();
		418
		419	av_extend (av, req->result - 1);
		420
		421	for (i = 0; i < req->result; ++i)
		422	{
166	SV *sv = newSVpv (buf, 0);	423	SV *sv = newSVpv (buf, 0);
167		424
168	av_push (av, sv);	425	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	426	buf += SvCUR (sv) + 1;
170	req->result--;	427	}
		428
		429	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	430	}
172		431
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	432	PUSHs (rv);
174	}	433	}
		434	break;
175		435
176	PUSHs (rv);	436	case REQ_OPEN:
		437	{
		438	/* convert fd to fh */
		439	SV *fh;
		440
		441	PUSHs (sv_2mortal (newSViv (req->result)));
		442	PUTBACK;
		443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		444	SPAGAIN;
		445
		446	fh = SvREFCNT_inc (POPs);
		447
		448	PUSHMARK (SP);
		449	XPUSHs (sv_2mortal (fh));
		450	}
		451	break;
		452
		453	case REQ_GROUP:
		454	req->fd = 2; /* mark group as finished */
		455
		456	if (req->data)
		457	{
		458	int i;
		459	AV *av = (AV *)req->data;
		460
		461	EXTEND (SP, AvFILL (av) + 1);
		462	for (i = 0; i <= AvFILL (av); ++i)
		463	PUSHs (*av_fetch (av, i, 0));
		464	}
		465	break;
		466
		467	case REQ_NOP:
		468	case REQ_BUSY:
		469	break;
		470
		471	default:
		472	PUSHs (sv_2mortal (newSViv (req->result)));
		473	break;
177	}	474	}
178	break;
179		475
180	case REQ_OPEN:	476	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		477
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	478	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
188	SPAGAIN;
189
190	fh = SvREFCNT_inc (POPs);
191
192	PUSHMARK (SP);
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_GROUP:
198	if (req->data)
199	{
200	int i;
201	AV *av = (AV *)req->data;
202
203	EXTEND (SP, AvFILL (av) + 1);
204	for (i = 0; i <= AvFILL (av); ++i)
205	PUSHs (*av_fetch (av, i, 0));
206	}
207	break;
208
209	case REQ_SLEEP:
210	break;
211
212	default:
213	PUSHs (sv_2mortal (newSViv (req->result)));
214	break;
215	}
216
217
218	PUTBACK;
219	call_sv (req->callback, G_VOID | G_EVAL);	479	call_sv (req->callback, G_VOID | G_EVAL);
220	SPAGAIN;	480	SPAGAIN;
		481
		482	FREETMPS;
		483	LEAVE;
		484	}
		485
		486	if (req->grp)
		487	{
		488	aio_req grp = req->grp;
		489
		490	/* unlink request */
		491	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		492	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		493
		494	if (grp->grp_first == req)
		495	grp->grp_first = req->grp_next;
		496
		497	aio_grp_dec (grp);
		498	}
221		499
222	if (SvTRUE (ERRSV))	500	if (SvTRUE (ERRSV))
223	{	501	{
224	req_free (req);	502	req_free (req);
225	croak (0);	503	croak (0);
226	}	504	}
227
228	LEAVE;
229
230	errno = errorno;
231	}	505	}
232		506
233	static void req_free (aio_req req)	507	static void req_free (aio_req req)
234	{	508	{
235	if (req->grp)
236	{
237	aio_req grp = req->grp;
238
239	/* unlink request */
240	req->grp_next->grp_prev = req->grp_prev;
241	req->grp_prev->grp_next = req->grp_next;
242
243	if (grp->grp_next == grp && grp->fd)
244	{
245	req_invoke (grp);
246	req_free (grp);
247	}
248	}
249
250	if (req->self)	509	if (req->self)
251	{	510	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	511	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	512	SvREFCNT_dec (req->self);
254	}	513	}
255		514
256	if (req->data)
257	SvREFCNT_dec (req->data);	515	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	516	SvREFCNT_dec (req->fh);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	517	SvREFCNT_dec (req->fh2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	518	SvREFCNT_dec (req->callback);
		519	Safefree (req->statdata);
270		520
271	if (req->type == REQ_READDIR && req->result >= 0)	521	if (req->type == REQ_READDIR)
272	free (req->data2ptr);	522	free (req->data2ptr);
273		523
274	Safefree (req);	524	Safefree (req);
275	}	525	}
276		526
		527	static void req_cancel_subs (aio_req grp)
		528	{
		529	aio_req sub;
		530
		531	if (grp->type != REQ_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->fh2);
		535	grp->fh2 = 0;
		536
		537	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		538	req_cancel (sub);
		539	}
		540
277	static void req_cancel (aio_req req)	541	static void req_cancel (aio_req req)
278	{	542	{
279	req->cancelled = 1;	543	req->flags |= FLAG_CANCELLED;
280		544
281	if (req->type == REQ_GROUP)	545	req_cancel_subs (req);
282	{
283	aio_req sub;
284
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
286	req_cancel (sub);
287	}
288	}
289
290	static int poll_cb ()
291	{
292	dSP;
293	int count = 0;
294	int do_croak = 0;
295	aio_req req;
296
297	for (;;)
298	{
299	pthread_mutex_lock (&reslock);
300	req = ress;
301
302	if (req)
303	{
304	ress = req->next;
305
306	if (!ress)
307	{
308	/* read any signals sent by the worker threads */
309	char buf [32];
310	while (read (respipe [0], buf, 32) == 32)
311	;
312
313	rese = 0;
314	}
315	}
316
317	pthread_mutex_unlock (&reslock);
318
319	if (!req)
320	break;
321
322	nreqs--;
323
324	if (req->type == REQ_QUIT)
325	started--;
326	else if (req->type == REQ_GROUP && req->grp_next != req)
327	{
328	req->fd = 1; /* mark request as delayed */
329	continue;
330	}
331	else
332	{
333	if (req->type == REQ_READ)
334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
335
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
337	SvREADONLY_off (req->data);
338
339	if (req->statdata)
340	{
341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
342	PL_laststatval = req->result;
343	PL_statcache = *(req->statdata);
344	}
345
346	req_invoke (req);
347
348	count++;
349	}
350
351	req_free (req);
352	}
353
354	return count;
355	}	546	}
356		547
357	static void *aio_proc(void *arg);	548	static void *aio_proc(void *arg);
358		549
359	static void start_thread (void)	550	static void start_thread (void)
360	{	551	{
361	sigset_t fullsigset, oldsigset;	552	sigset_t fullsigset, oldsigset;
362	pthread_t tid;
363	pthread_attr_t attr;	553	pthread_attr_t attr;
		554
		555	worker *wrk = calloc (1, sizeof (worker));
		556
		557	if (!wrk)
		558	croak ("unable to allocate worker thread data");
364		559
365	pthread_attr_init (&attr);	560	pthread_attr_init (&attr);
366	pthread_attr_setstacksize (&attr, STACKSIZE);	561	pthread_attr_setstacksize (&attr, STACKSIZE);
367	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		563	#ifdef PTHREAD_SCOPE_PROCESS
		564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		565	#endif
368		566
369	sigfillset (&fullsigset);	567	sigfillset (&fullsigset);
		568
		569	LOCK (wrklock);
370	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
371		571
372	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		573	{
		574	wrk->prev = &wrk_first;
		575	wrk->next = wrk_first.next;
		576	wrk_first.next->prev = wrk;
		577	wrk_first.next = wrk;
373	started++;	578	++started;
		579	}
		580	else
		581	free (wrk);
374		582
375	sigprocmask (SIG_SETMASK, &oldsigset, 0);	583	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		584	UNLOCK (wrklock);
		585	}
		586
		587	static void maybe_start_thread ()
		588	{
		589	if (get_nthreads () >= wanted)
		590	return;
		591
		592	/* todo: maybe use idle here, but might be less exact */
		593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		594	return;
		595
		596	start_thread ();
376	}	597	}
377		598
378	static void req_send (aio_req req)	599	static void req_send (aio_req req)
379	{	600	{
380	while (started < wanted && nreqs >= started)
381	start_thread ();
382
383	nreqs++;	601	++nreqs;
384		602
385	pthread_mutex_lock (&reqlock);	603	LOCK (reqlock);
386		604	++nready;
387	req->next = 0;	605	reqq_push (&req_queue, req);
388
389	if (reqe)
390	{
391	reqe->next = req;
392	reqe = req;
393	}
394	else
395	reqe = reqs = req;
396
397	pthread_cond_signal (&reqwait);	606	pthread_cond_signal (&reqwait);
398	pthread_mutex_unlock (&reqlock);	607	UNLOCK (reqlock);
399		608
400	if (nreqs > max_outstanding)	609	maybe_start_thread ();
401	for (;;)
402	{
403	poll_cb ();
404
405	if (nreqs <= max_outstanding)
406	break;
407
408	poll_wait ();
409	}
410	}	610	}
411		611
412	static void end_thread (void)	612	static void end_thread (void)
413	{	613	{
414	aio_req req;	614	aio_req req;
		615
415	Newz (0, req, 1, aio_cb);	616	Newz (0, req, 1, aio_cb);
		617
416	req->type = REQ_QUIT;	618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
417		620
418	req_send (req);	621	LOCK (reqlock);
		622	reqq_push (&req_queue, req);
		623	pthread_cond_signal (&reqwait);
		624	UNLOCK (reqlock);
		625
		626	LOCK (wrklock);
		627	--started;
		628	UNLOCK (wrklock);
		629	}
		630
		631	static void set_max_idle (int nthreads)
		632	{
		633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		634	max_idle = nthreads <= 0 ? 1 : nthreads;
		635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
419	}	636	}
420		637
421	static void min_parallel (int nthreads)	638	static void min_parallel (int nthreads)
422	{	639	{
423	if (wanted < nthreads)	640	if (wanted < nthreads)
424	wanted = nthreads;	641	wanted = nthreads;
425	}	642	}
426		643
427	static void max_parallel (int nthreads)	644	static void max_parallel (int nthreads)
428	{	645	{
429	int cur = started;
430
431	if (wanted > nthreads)	646	if (wanted > nthreads)
432	wanted = nthreads;	647	wanted = nthreads;
433		648
434	while (cur > wanted)
435	{
436	end_thread ();
437	cur--;
438	}
439
440	while (started > wanted)	649	while (started > wanted)
		650	end_thread ();
		651	}
		652
		653	static void poll_wait ()
		654	{
		655	fd_set rfd;
		656
		657	while (nreqs)
		658	{
		659	int size;
		660	if (WORDACCESS_UNSAFE) LOCK (reslock);
		661	size = res_queue.size;
		662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		663
		664	if (size)
		665	return;
		666
		667	maybe_start_thread ();
		668
		669	FD_ZERO(&rfd);
		670	FD_SET(respipe [0], &rfd);
		671
		672	select (respipe [0] + 1, &rfd, 0, 0, 0);
441	{	673	}
		674	}
		675
		676	static int poll_cb ()
		677	{
		678	dSP;
		679	int count = 0;
		680	int maxreqs = max_poll_reqs;
		681	int do_croak = 0;
		682	struct timeval tv_start, tv_now;
		683	aio_req req;
		684
		685	if (max_poll_time)
		686	gettimeofday (&tv_start, 0);
		687
		688	for (;;)
		689	{
		690	for (;;)
		691	{
		692	maybe_start_thread ();
		693
		694	LOCK (reslock);
		695	req = reqq_shift (&res_queue);
		696
		697	if (req)
		698	{
		699	--npending;
		700
		701	if (!res_queue.size)
		702	{
		703	/* read any signals sent by the worker threads */
		704	char buf [32];
		705	while (read (respipe [0], buf, 32) == 32)
		706	;
		707	}
		708	}
		709
		710	UNLOCK (reslock);
		711
		712	if (!req)
		713	break;
		714
		715	--nreqs;
		716
		717	if (req->type == REQ_GROUP && req->length)
		718	{
		719	req->fd = 1; /* mark request as delayed */
		720	continue;
		721	}
		722	else
		723	{
		724	if (req->type == REQ_READ)
		725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		726
		727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		728	SvREADONLY_off (req->data);
		729
		730	if (req->statdata)
		731	{
		732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		733	PL_laststatval = req->result;
		734	PL_statcache = *(req->statdata);
		735	}
		736
		737	req_invoke (req);
		738
		739	count++;
		740	}
		741
		742	req_free (req);
		743
		744	if (maxreqs && !--maxreqs)
		745	break;
		746
		747	if (max_poll_time)
		748	{
		749	gettimeofday (&tv_now, 0);
		750
		751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		752	break;
		753	}
		754	}
		755
		756	if (nreqs <= max_outstanding)
		757	break;
		758
442	poll_wait ();	759	poll_wait ();
443	poll_cb ();	760
		761	++maxreqs;
444	}	762	}
		763
		764	return count;
445	}	765	}
446		766
447	static void create_pipe ()	767	static void create_pipe ()
448	{	768	{
449	if (pipe (respipe))	769	if (pipe (respipe))
…		…
473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
474	{	794	{
475	ssize_t res;	795	ssize_t res;
476	off_t ooffset;	796	off_t ooffset;
477		797
478	pthread_mutex_lock (&preadwritelock);	798	LOCK (preadwritelock);
479	ooffset = lseek (fd, 0, SEEK_CUR);	799	ooffset = lseek (fd, 0, SEEK_CUR);
480	lseek (fd, offset, SEEK_SET);	800	lseek (fd, offset, SEEK_SET);
481	res = read (fd, buf, count);	801	res = read (fd, buf, count);
482	lseek (fd, ooffset, SEEK_SET);	802	lseek (fd, ooffset, SEEK_SET);
483	pthread_mutex_unlock (&preadwritelock);	803	UNLOCK (preadwritelock);
484		804
485	return res;	805	return res;
486	}	806	}
487		807
488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
489	{	809	{
490	ssize_t res;	810	ssize_t res;
491	off_t ooffset;	811	off_t ooffset;
492		812
493	pthread_mutex_lock (&preadwritelock);	813	LOCK (preadwritelock);
494	ooffset = lseek (fd, 0, SEEK_CUR);	814	ooffset = lseek (fd, 0, SEEK_CUR);
495	lseek (fd, offset, SEEK_SET);	815	lseek (fd, offset, SEEK_SET);
496	res = write (fd, buf, count);	816	res = write (fd, buf, count);
497	lseek (fd, offset, SEEK_SET);	817	lseek (fd, offset, SEEK_SET);
498	pthread_mutex_unlock (&preadwritelock);	818	UNLOCK (preadwritelock);
499		819
500	return res;	820	return res;
501	}	821	}
502	#endif	822	#endif
503		823
504	#if !HAVE_FDATASYNC	824	#if !HAVE_FDATASYNC
505	# define fdatasync fsync	825	# define fdatasync fsync
506	#endif	826	#endif
507		827
508	#if !HAVE_READAHEAD	828	#if !HAVE_READAHEAD
509	# define readahead aio_readahead	829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
510		830
511	static ssize_t readahead (int fd, off_t offset, size_t count)	831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
512	{	832	{
513	char readahead_buf[4096];	833	dBUF;
514		834
515	while (count > 0)	835	while (count > 0)
516	{	836	{
517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
518		838
519	pread (fd, readahead_buf, len, offset);	839	pread (fd, aio_buf, len, offset);
520	offset += len;	840	offset += len;
521	count -= len;	841	count -= len;
522	}	842	}
523		843
524	errno = 0;	844	errno = 0;
525	}	845	}
		846
526	#endif	847	#endif
527		848
528	#if !HAVE_READDIR_R	849	#if !HAVE_READDIR_R
529	# define readdir_r aio_readdir_r	850	# define readdir_r aio_readdir_r
530		851
…		…
533	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
534	{	855	{
535	struct dirent *e;	856	struct dirent *e;
536	int errorno;	857	int errorno;
537		858
538	pthread_mutex_lock (&readdirlock);	859	LOCK (readdirlock);
539		860
540	e = readdir (dirp);	861	e = readdir (dirp);
541	errorno = errno;	862	errorno = errno;
542		863
543	if (e)	864	if (e)
…		…
546	strcpy (ent->d_name, e->d_name);	867	strcpy (ent->d_name, e->d_name);
547	}	868	}
548	else	869	else
549	*res = 0;	870	*res = 0;
550		871
551	pthread_mutex_unlock (&readdirlock);	872	UNLOCK (readdirlock);
552		873
553	errno = errorno;	874	errno = errorno;
554	return e ? 0 : -1;	875	return e ? 0 : -1;
555	}	876	}
556	#endif	877	#endif
557		878
558	/* sendfile always needs emulation */	879	/* sendfile always needs emulation */
559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
560	{	881	{
561	ssize_t res;	882	ssize_t res;
562		883
563	if (!count)	884	if (!count)
564	return 0;	885	return 0;
…		…
575	{	896	{
576	off_t sbytes;	897	off_t sbytes;
577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
578		899
579	if (res < 0 && sbytes)	900	if (res < 0 && sbytes)
580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
581	res = sbytes;	902	res = sbytes;
582	}	903	}
583		904
584	# elif __hpux	905	# elif __hpux
585	res = sendfile (ofd, ifd, offset, count, 0, 0);	906	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
613	#endif	934	#endif
614	)	935	)
615	)	936	)
616	{	937	{
617	/* emulate sendfile. this is a major pain in the ass */	938	/* emulate sendfile. this is a major pain in the ass */
618	char buf[4096];	939	dBUF;
		940
619	res = 0;	941	res = 0;
620		942
621	while (count)	943	while (count)
622	{	944	{
623	ssize_t cnt;	945	ssize_t cnt;
624		946
625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
626		948
627	if (cnt <= 0)	949	if (cnt <= 0)
628	{	950	{
629	if (cnt && !res) res = -1;	951	if (cnt && !res) res = -1;
630	break;	952	break;
631	}	953	}
632		954
633	cnt = write (ofd, buf, cnt);	955	cnt = write (ofd, aio_buf, cnt);
634		956
635	if (cnt <= 0)	957	if (cnt <= 0)
636	{	958	{
637	if (cnt && !res) res = -1;	959	if (cnt && !res) res = -1;
638	break;	960	break;
…		…
646		968
647	return res;	969	return res;
648	}	970	}
649		971
650	/* read a full directory */	972	/* read a full directory */
651	static int scandir_ (const char *path, void **namesp)	973	static void scandir_ (aio_req req, worker *self)
652	{	974	{
653	DIR *dirp = opendir (path);	975	DIR *dirp;
654	union	976	union
655	{	977	{
656	struct dirent d;	978	struct dirent d;
657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
658	} u;	980	} *u;
659	struct dirent *entp;	981	struct dirent *entp;
660	char *name, *names;	982	char *name, *names;
661	int memlen = 4096;	983	int memlen = 4096;
662	int memofs = 0;	984	int memofs = 0;
663	int res = 0;	985	int res = 0;
664	int errorno;	986	int errorno;
665		987
666	if (!dirp)	988	LOCK (wrklock);
667	return -1;	989	self->dirp = dirp = opendir (req->dataptr);
668		990	self->dbuf = u = malloc (sizeof (*u));
669	names = malloc (memlen);	991	req->data2ptr = names = malloc (memlen);
		992	UNLOCK (wrklock);
		993
		994	if (dirp && u && names)
		995	for (;;)
		996	{
		997	errno = 0;
		998	readdir_r (dirp, &u->d, &entp);
		999
		1000	if (!entp)
		1001	break;
		1002
		1003	name = entp->d_name;
		1004
		1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1006	{
		1007	int len = strlen (name) + 1;
		1008
		1009	res++;
		1010
		1011	while (memofs + len > memlen)
		1012	{
		1013	memlen *= 2;
		1014	LOCK (wrklock);
		1015	req->data2ptr = names = realloc (names, memlen);
		1016	UNLOCK (wrklock);
		1017
		1018	if (!names)
		1019	break;
		1020	}
		1021
		1022	memcpy (names + memofs, name, len);
		1023	memofs += len;
		1024	}
		1025	}
		1026
		1027	if (errno)
		1028	res = -1;
		1029
		1030	req->result = res;
		1031	}
		1032
		1033	/*****************************************************************************/
		1034
		1035	static void *aio_proc (void *thr_arg)
		1036	{
		1037	aio_req req;
		1038	struct timespec ts;
		1039	worker *self = (worker *)thr_arg;
		1040
		1041	/* try to distribute timeouts somewhat evenly */
		1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1043	* (1000000000UL / 1024UL);
670		1044
671	for (;;)	1045	for (;;)
672	{	1046	{
673	errno = 0, readdir_r (dirp, &u.d, &entp);	1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
674		1048
675	if (!entp)	1049	LOCK (reqlock);
676	break;
677
678	name = entp->d_name;
679
680	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
681	{
682	int len = strlen (name) + 1;
683
684	res++;
685
686	while (memofs + len > memlen)
687	{
688	memlen *= 2;
689	names = realloc (names, memlen);
690	if (!names)
691	break;
692	}
693
694	memcpy (names + memofs, name, len);
695	memofs += len;
696	}
697	}
698
699	errorno = errno;
700	closedir (dirp);
701
702	if (errorno)
703	{
704	free (names);
705	errno = errorno;
706	res = -1;
707	}
708
709	*namesp = (void *)names;
710	return res;
711	}
712
713	/*****************************************************************************/
714
715	static void *aio_proc (void *thr_arg)
716	{
717	aio_req req;
718	int type;
719
720	do
721	{
722	pthread_mutex_lock (&reqlock);
723		1050
724	for (;;)	1051	for (;;)
725	{	1052	{
726	req = reqs;	1053	self->req = req = reqq_shift (&req_queue);
727
728	if (reqs)
729	{
730	reqs = reqs->next;
731	if (!reqs) reqe = 0;
732	}
733		1054
734	if (req)	1055	if (req)
735	break;	1056	break;
736		1057
		1058	++idle;
		1059
		1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1061	== ETIMEDOUT)
		1062	{
		1063	if (idle > max_idle)
		1064	{
		1065	--idle;
		1066	UNLOCK (reqlock);
		1067	LOCK (wrklock);
		1068	--started;
		1069	UNLOCK (wrklock);
		1070	goto quit;
		1071	}
		1072
		1073	/* we are allowed to idle, so do so without any timeout */
737	pthread_cond_wait (&reqwait, &reqlock);	1074	pthread_cond_wait (&reqwait, &reqlock);
		1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1076	}
		1077
		1078	--idle;
738	}	1079	}
739		1080
740	pthread_mutex_unlock (&reqlock);	1081	--nready;
		1082
		1083	UNLOCK (reqlock);
741		1084
742	errno = 0; /* strictly unnecessary */	1085	errno = 0; /* strictly unnecessary */
743		1086
744	if (!req->cancelled)	1087	if (!(req->flags & FLAG_CANCELLED))
745	switch (req->type)	1088	switch (req->type)
746	{	1089	{
747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
749		1092
750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
751	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
752		1095
753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
756		1099
…		…
759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
764		1108
765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
766	case REQ_FSYNC: req->result = fsync (req->fd); break;	1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1111	case REQ_READDIR: scandir_ (req, self); break;
768		1112
769	case REQ_SLEEP:	1113	case REQ_BUSY:
770	{	1114	{
771	struct timeval tv;	1115	struct timeval tv;
772		1116
773	tv.tv_sec = req->fd;	1117	tv.tv_sec = req->fd;
774	tv.tv_usec = req->fd2;	1118	tv.tv_usec = req->fd2;
775		1119
776	req->result = select (0, 0, 0, 0, &tv);	1120	req->result = select (0, 0, 0, 0, &tv);
777	}	1121	}
778		1122
		1123	case REQ_GROUP:
		1124	case REQ_NOP:
		1125	break;
		1126
779	case REQ_QUIT:	1127	case REQ_QUIT:
780	break;	1128	goto quit;
781		1129
782	default:	1130	default:
783	req->result = ENOSYS;	1131	req->result = ENOSYS;
784	break;	1132	break;
785	}	1133	}
786		1134
787	req->errorno = errno;	1135	req->errorno = errno;
788		1136
789	pthread_mutex_lock (&reslock);	1137	LOCK (reslock);
790		1138
791	req->next = 0;	1139	++npending;
792		1140
793	if (rese)	1141	if (!reqq_push (&res_queue, req))
794	{
795	rese->next = req;
796	rese = req;
797	}
798	else
799	{
800	rese = ress = req;
801
802	/* write a dummy byte to the pipe so fh becomes ready */	1142	/* write a dummy byte to the pipe so fh becomes ready */
803	write (respipe [1], &respipe, 1);	1143	write (respipe [1], &respipe, 1);
804	}
805		1144
806	pthread_mutex_unlock (&reslock);	1145	self->req = 0;
		1146	worker_clear (self);
		1147
		1148	UNLOCK (reslock);
807	}	1149	}
808	while (type != REQ_QUIT);	1150
		1151	quit:
		1152	LOCK (wrklock);
		1153	worker_free (self);
		1154	UNLOCK (wrklock);
809		1155
810	return 0;	1156	return 0;
811	}	1157	}
812		1158
813	/*****************************************************************************/	1159	/*****************************************************************************/
814		1160
815	static void atfork_prepare (void)	1161	static void atfork_prepare (void)
816	{	1162	{
817	pthread_mutex_lock (&reqlock);	1163	LOCK (wrklock);
818	pthread_mutex_lock (&reslock);	1164	LOCK (reqlock);
		1165	LOCK (reslock);
819	#if !HAVE_PREADWRITE	1166	#if !HAVE_PREADWRITE
820	pthread_mutex_lock (&preadwritelock);	1167	LOCK (preadwritelock);
821	#endif	1168	#endif
822	#if !HAVE_READDIR_R	1169	#if !HAVE_READDIR_R
823	pthread_mutex_lock (&readdirlock);	1170	LOCK (readdirlock);
824	#endif	1171	#endif
825	}	1172	}
826		1173
827	static void atfork_parent (void)	1174	static void atfork_parent (void)
828	{	1175	{
829	#if !HAVE_READDIR_R	1176	#if !HAVE_READDIR_R
830	pthread_mutex_unlock (&readdirlock);	1177	UNLOCK (readdirlock);
831	#endif	1178	#endif
832	#if !HAVE_PREADWRITE	1179	#if !HAVE_PREADWRITE
833	pthread_mutex_unlock (&preadwritelock);	1180	UNLOCK (preadwritelock);
834	#endif	1181	#endif
835	pthread_mutex_unlock (&reslock);	1182	UNLOCK (reslock);
836	pthread_mutex_unlock (&reqlock);	1183	UNLOCK (reqlock);
		1184	UNLOCK (wrklock);
837	}	1185	}
838		1186
839	static void atfork_child (void)	1187	static void atfork_child (void)
840	{	1188	{
841	aio_req prv;	1189	aio_req prv;
842		1190
		1191	while (prv = reqq_shift (&req_queue))
		1192	req_free (prv);
		1193
		1194	while (prv = reqq_shift (&res_queue))
		1195	req_free (prv);
		1196
		1197	while (wrk_first.next != &wrk_first)
		1198	{
		1199	worker *wrk = wrk_first.next;
		1200
		1201	if (wrk->req)
		1202	req_free (wrk->req);
		1203
		1204	worker_clear (wrk);
		1205	worker_free (wrk);
		1206	}
		1207
843	started = 0;	1208	started = 0;
844		1209	idle = 0;
845	while (reqs)	1210	nreqs = 0;
846	{	1211	nready = 0;
847	prv = reqs;	1212	npending = 0;
848	reqs = prv->next;
849	req_free (prv);
850	}
851
852	reqs = reqe = 0;
853
854	while (ress)
855	{
856	prv = ress;
857	ress = prv->next;
858	req_free (prv);
859	}
860
861	ress = rese = 0;
862		1213
863	close (respipe [0]);	1214	close (respipe [0]);
864	close (respipe [1]);	1215	close (respipe [1]);
865	create_pipe ();	1216	create_pipe ();
866		1217
867	atfork_parent ();	1218	atfork_parent ();
868	}	1219	}
869		1220
870	#define dREQ \	1221	#define dREQ \
871	aio_req req; \	1222	aio_req req; \
		1223	int req_pri = next_pri; \
		1224	next_pri = DEFAULT_PRI + PRI_BIAS; \
872	\	1225	\
873	if (SvOK (callback) && !SvROK (callback)) \	1226	if (SvOK (callback) && !SvROK (callback)) \
874	croak ("callback must be undef or of reference type"); \	1227	croak ("callback must be undef or of reference type"); \
875	\	1228	\
876	Newz (0, req, 1, aio_cb); \	1229	Newz (0, req, 1, aio_cb); \
877	if (!req) \	1230	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	1231	croak ("out of memory during aio_req allocation"); \
879	\	1232	\
880	req->callback = newSVsv (callback)	1233	req->callback = newSVsv (callback); \
		1234	req->pri = req_pri
881		1235
882	#define REQ_SEND \	1236	#define REQ_SEND \
883	req_send (req); \	1237	req_send (req); \
884	\	1238	\
885	if (GIMME_V != G_VOID) \	1239	if (GIMME_V != G_VOID) \
…		…
890	PROTOTYPES: ENABLE	1244	PROTOTYPES: ENABLE
891		1245
892	BOOT:	1246	BOOT:
893	{	1247	{
894	HV *stash = gv_stashpv ("IO::AIO", 1);	1248	HV *stash = gv_stashpv ("IO::AIO", 1);
		1249
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
898		1256
899	create_pipe ();	1257	create_pipe ();
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
901	}	1259	}
902		1260
903	void	1261	void
904	min_parallel (nthreads)	1262	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	1263	PROTOTYPE: $
		1264	CODE:
		1265	max_poll_reqs = nreqs;
907		1266
908	void	1267	void
909	max_parallel (nthreads)	1268	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	1269	PROTOTYPE: $
		1270	CODE:
		1271	max_poll_time = nseconds * AIO_TICKS;
		1272
		1273	void
		1274	min_parallel (int nthreads)
		1275	PROTOTYPE: $
		1276
		1277	void
		1278	max_parallel (int nthreads)
		1279	PROTOTYPE: $
		1280
		1281	void
		1282	max_idle (int nthreads)
		1283	PROTOTYPE: $
		1284	CODE:
		1285	set_max_idle (nthreads);
912		1286
913	int	1287	int
914	max_outstanding (nreqs)	1288	max_outstanding (int maxreqs)
915	int nreqs	1289	PROTOTYPE: $
916	PROTOTYPE: $
917	CODE:	1290	CODE:
918	RETVAL = max_outstanding;	1291	RETVAL = max_outstanding;
919	max_outstanding = nreqs;	1292	max_outstanding = maxreqs;
		1293	OUTPUT:
		1294	RETVAL
920		1295
921	void	1296	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
923	SV * pathname	1298	SV * pathname
924	int flags	1299	int flags
…		…
1139		1514
1140	REQ_SEND;	1515	REQ_SEND;
1141	}	1516	}
1142		1517
1143	void	1518	void
		1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1520	SV * pathname
		1521	SV * callback
		1522	UV mode
		1523	UV dev
		1524	PPCODE:
		1525	{
		1526	dREQ;
		1527
		1528	req->type = REQ_MKNOD;
		1529	req->data = newSVsv (pathname);
		1530	req->dataptr = SvPVbyte_nolen (req->data);
		1531	req->mode = (mode_t)mode;
		1532	req->offset = dev;
		1533
		1534	REQ_SEND;
		1535	}
		1536
		1537	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	1538	aio_busy (delay,callback=&PL_sv_undef)
1145	double delay	1539	double delay
1146	SV * callback	1540	SV * callback
1147	PPCODE:	1541	PPCODE:
1148	{	1542	{
1149	dREQ;	1543	dREQ;
1150		1544
1151	req->type = REQ_SLEEP;	1545	req->type = REQ_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	1546	req->fd = delay < 0. ? 0 : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154		1548
1155	REQ_SEND;	1549	REQ_SEND;
1156	}	1550	}
…		…
1160	SV * callback	1554	SV * callback
1161	PROTOTYPE: ;$	1555	PROTOTYPE: ;$
1162	PPCODE:	1556	PPCODE:
1163	{	1557	{
1164	dREQ;	1558	dREQ;
		1559
1165	req->type = REQ_GROUP;	1560	req->type = REQ_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168
1169	req_send (req);	1561	req_send (req);
		1562
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	1564	}
		1565
		1566	void
		1567	aio_nop (callback=&PL_sv_undef)
		1568	SV * callback
		1569	PPCODE:
		1570	{
		1571	dREQ;
		1572
		1573	req->type = REQ_NOP;
		1574
		1575	REQ_SEND;
		1576	}
		1577
		1578	int
		1579	aioreq_pri (int pri = 0)
		1580	PROTOTYPE: ;$
		1581	CODE:
		1582	RETVAL = next_pri - PRI_BIAS;
		1583	if (items > 0)
		1584	{
		1585	if (pri < PRI_MIN) pri = PRI_MIN;
		1586	if (pri > PRI_MAX) pri = PRI_MAX;
		1587	next_pri = pri + PRI_BIAS;
		1588	}
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	aioreq_nice (int nice = 0)
		1594	CODE:
		1595	nice = next_pri - nice;
		1596	if (nice < PRI_MIN) nice = PRI_MIN;
		1597	if (nice > PRI_MAX) nice = PRI_MAX;
		1598	next_pri = nice + PRI_BIAS;
1172		1599
1173	void	1600	void
1174	flush ()	1601	flush ()
1175	PROTOTYPE:	1602	PROTOTYPE:
1176	CODE:	1603	CODE:
1177	while (nreqs)	1604	while (nreqs)
1178	{	1605	{
1179	poll_wait ();	1606	poll_wait ();
1180	poll_cb ();	1607	poll_cb (0);
1181	}	1608	}
1182		1609
1183	void	1610	void
1184	poll()	1611	poll()
1185	PROTOTYPE:	1612	PROTOTYPE:
1186	CODE:	1613	CODE:
1187	if (nreqs)	1614	if (nreqs)
1188	{	1615	{
1189	poll_wait ();	1616	poll_wait ();
1190	poll_cb ();	1617	poll_cb (0);
1191	}	1618	}
1192		1619
1193	int	1620	int
1194	poll_fileno()	1621	poll_fileno()
1195	PROTOTYPE:	1622	PROTOTYPE:
…		…
1219	CODE:	1646	CODE:
1220	RETVAL = nreqs;	1647	RETVAL = nreqs;
1221	OUTPUT:	1648	OUTPUT:
1222	RETVAL	1649	RETVAL
1223		1650
1224	PROTOTYPES: DISABLE	1651	int
1225		1652	nready()
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227
1228	void
1229	cancel (aio_req_ornot req)
1230	PROTOTYPE:	1653	PROTOTYPE:
1231	CODE:	1654	CODE:
		1655	RETVAL = get_nready ();
		1656	OUTPUT:
		1657	RETVAL
		1658
		1659	int
		1660	npending()
		1661	PROTOTYPE:
		1662	CODE:
		1663	RETVAL = get_npending ();
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	nthreads()
		1669	PROTOTYPE:
		1670	CODE:
		1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1672	RETVAL = started;
		1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	PROTOTYPES: DISABLE
		1678
		1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1680
		1681	void
		1682	cancel (aio_req_ornot req)
		1683	CODE:
1232	req_cancel (req);	1684	req_cancel (req);
		1685
		1686	void
		1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1688	CODE:
		1689	SvREFCNT_dec (req->callback);
		1690	req->callback = newSVsv (callback);
1233		1691
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1693
1236	void	1694	void
1237	add (aio_req grp, ...)	1695	add (aio_req grp, ...)
1238	PPCODE:	1696	PPCODE:
1239	{	1697	{
1240	int i;	1698	int i;
		1699	aio_req req;
		1700
		1701	if (grp->fd == 2)
		1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1241		1703
1242	for (i = 1; i < items; ++i )	1704	for (i = 1; i < items; ++i )
1243	{	1705	{
1244	if (GIMME_V != G_VOID)	1706	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1708
1247	aio_req req = SvAIO_REQ (ST (i));	1709	req = SvAIO_REQ (ST (i));
1248		1710
1249	if (req)	1711	if (req)
1250	{	1712	{
1251	req->grp_prev = grp;	1713	++grp->length;
1252	req->grp_next = grp->grp_next;
1253	grp->grp_next->grp_prev = req;
1254	grp->grp_next = req;
1255
1256	req->grp = grp;	1714	req->grp = grp;
		1715
		1716	req->grp_prev = 0;
		1717	req->grp_next = grp->grp_first;
		1718
		1719	if (grp->grp_first)
		1720	grp->grp_first->grp_prev = req;
		1721
		1722	grp->grp_first = req;
1257	}	1723	}
1258	}	1724	}
1259	}	1725	}
1260		1726
1261	void	1727	void
		1728	cancel_subs (aio_req_ornot req)
		1729	CODE:
		1730	req_cancel_subs (req);
		1731
		1732	void
1262	result (aio_req grp, ...)	1733	result (aio_req grp, ...)
		1734	CODE:
		1735	{
		1736	int i;
		1737	AV *av;
		1738
		1739	grp->errorno = errno;
		1740
		1741	av = newAV ();
		1742
		1743	for (i = 1; i < items; ++i )
		1744	av_push (av, newSVsv (ST (i)));
		1745
		1746	SvREFCNT_dec (grp->data);
		1747	grp->data = (SV *)av;
		1748	}
		1749
		1750	void
		1751	errno (aio_req grp, int errorno = errno)
		1752	CODE:
		1753	grp->errorno = errorno;
		1754
		1755	void
		1756	limit (aio_req grp, int limit)
1263	CODE:	1757	CODE:
1264	{	1758	grp->fd2 = limit;
1265	int i;	1759	aio_grp_feed (grp);
1266	AV *av = newAV ();
1267		1760
1268	if (grp->data)	1761	void
		1762	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1763	CODE:
		1764	{
1269	SvREFCNT_dec (grp->data);	1765	SvREFCNT_dec (grp->fh2);
		1766	grp->fh2 = newSVsv (callback);
1270		1767
1271	for (i = 1; i < items; ++i )	1768	if (grp->fd2 <= 0)
1272	av_push (av, newSVsv (ST (i)));	1769	grp->fd2 = 2;
1273		1770
1274	grp->data = (SV *)av;	1771	aio_grp_feed (grp);
1275	}	1772	}
1276		1773

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