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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.52 by root, Sun Oct 22 22:14:54 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 *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	#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 ();
106	static void req_invoke (aio_req req);	322	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	323	static void req_free (aio_req req);
		324	static void req_cancel (aio_req req);
108		325
109	/* must be called at most once */	326	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	327	static SV *req_sv (aio_req req, const char *klass)
111	{	328	{
112	if (!req->self)	329	if (!req->self)
…		…
118	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)));
119	}	336	}
120		337
121	static aio_req SvAIO_REQ (SV *sv)	338	static aio_req SvAIO_REQ (SV *sv)
122	{	339	{
		340	MAGIC *mg;
		341
123	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	342	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
124	croak ("object of class " AIO_REQ_KLASS " expected");	343	croak ("object of class " AIO_REQ_KLASS " expected");
125		344
126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	345	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127		346
128	return mg ? (aio_req)mg->mg_ptr : 0;	347	return mg ? (aio_req)mg->mg_ptr : 0;
129	}	348	}
130		349
131	static void aio_grp_feed (aio_req grp)	350	static void aio_grp_feed (aio_req grp)
132	{	351	{
133	while (grp->length < grp->fd2)	352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
134	{	353	{
135	int old_len = grp->length;	354	int old_len = grp->length;
136		355
137	if (grp->fh2 && SvOK (grp->fh2))	356	if (grp->fh2 && SvOK (grp->fh2))
138	{	357	{
…		…
141	ENTER;	360	ENTER;
142	SAVETMPS;	361	SAVETMPS;
143	PUSHMARK (SP);	362	PUSHMARK (SP);
144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
145	PUTBACK;	364	PUTBACK;
146	call_sv (grp->fh2, G_VOID | G_EVAL);	365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
147	SPAGAIN;	366	SPAGAIN;
148	FREETMPS;	367	FREETMPS;
149	LEAVE;	368	LEAVE;
150	}	369	}
151		370
…		…
172	req_invoke (grp);	391	req_invoke (grp);
173	req_free (grp);	392	req_free (grp);
174	}	393	}
175	}	394	}
176		395
177	static void poll_wait ()
178	{
179	if (nreqs && !ress)
180	{
181	fd_set rfd;
182	FD_ZERO(&rfd);
183	FD_SET(respipe [0], &rfd);
184
185	select (respipe [0] + 1, &rfd, 0, 0, 0);
186	}
187	}
188
189	static void req_invoke (aio_req req)	396	static void req_invoke (aio_req req)
190	{	397	{
191	dSP;	398	dSP;
192	int errorno = errno;
193		399
194	if (req->cancelled || !SvOK (req->callback))	400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
195	return;	401	{
196
197	errno = req->errorno;
198
199	ENTER;	402	ENTER;
200	SAVETMPS;	403	SAVETMPS;
201	PUSHMARK (SP);	404	PUSHMARK (SP);
202	EXTEND (SP, 1);	405	EXTEND (SP, 1);
203		406
204	switch (req->type)	407	switch (req->type)
205	{
206	case REQ_READDIR:
207	{	408	{
208	SV *rv = &PL_sv_undef;	409	case REQ_READDIR:
209
210	if (req->result >= 0)
211	{	410	{
212	char *buf = req->data2ptr;	411	SV *rv = &PL_sv_undef;
213	AV *av = newAV ();
214		412
215	while (req->result)	413	if (req->result >= 0)
216	{	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	{
217	SV *sv = newSVpv (buf, 0);	423	SV *sv = newSVpv (buf, 0);
218		424
219	av_push (av, sv);	425	av_store (av, i, sv);
220	buf += SvCUR (sv) + 1;	426	buf += SvCUR (sv) + 1;
221	req->result--;	427	}
		428
		429	rv = sv_2mortal (newRV_noinc ((SV *)av));
222	}	430	}
223		431
224	rv = sv_2mortal (newRV_noinc ((SV *)av));	432	PUSHs (rv);
225	}	433	}
		434	break;
226		435
227	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;
228	}	474	}
229	break;
230		475
231	case REQ_OPEN:	476	errno = req->errorno;
232	{
233	/* convert fd to fh */
234	SV *fh;
235		477
236	PUSHs (sv_2mortal (newSViv (req->result)));
237	PUTBACK;	478	PUTBACK;
238	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
239	SPAGAIN;
240
241	fh = SvREFCNT_inc (POPs);
242
243	PUSHMARK (SP);
244	XPUSHs (sv_2mortal (fh));
245	}
246	break;
247
248	case REQ_GROUP:
249	req->fd = 2; /* mark group as finished */
250
251	if (req->data)
252	{
253	int i;
254	AV *av = (AV *)req->data;
255
256	EXTEND (SP, AvFILL (av) + 1);
257	for (i = 0; i <= AvFILL (av); ++i)
258	PUSHs (*av_fetch (av, i, 0));
259	}
260	break;
261
262	case REQ_SLEEP:
263	break;
264
265	default:
266	PUSHs (sv_2mortal (newSViv (req->result)));
267	break;
268	}
269
270
271	PUTBACK;
272	call_sv (req->callback, G_VOID | G_EVAL);	479	call_sv (req->callback, G_VOID | G_EVAL);
273	SPAGAIN;	480	SPAGAIN;
274		481
275	FREETMPS;	482	FREETMPS;
276	LEAVE;	483	LEAVE;
277
278	errno = errorno;
279
280	if (SvTRUE (ERRSV))
281	{	484	}
282	req_free (req);
283	croak (0);
284	}
285	}
286		485
287	static void req_free (aio_req req)
288	{
289	if (req->grp)	486	if (req->grp)
290	{	487	{
291	aio_req grp = req->grp;	488	aio_req grp = req->grp;
292		489
293	/* unlink request */	490	/* unlink request */
…		…
298	grp->grp_first = req->grp_next;	495	grp->grp_first = req->grp_next;
299		496
300	aio_grp_dec (grp);	497	aio_grp_dec (grp);
301	}	498	}
302		499
		500	if (SvTRUE (ERRSV))
		501	{
		502	req_free (req);
		503	croak (0);
		504	}
		505	}
		506
		507	static void req_free (aio_req req)
		508	{
303	if (req->self)	509	if (req->self)
304	{	510	{
305	sv_unmagic (req->self, PERL_MAGIC_ext);	511	sv_unmagic (req->self, PERL_MAGIC_ext);
306	SvREFCNT_dec (req->self);	512	SvREFCNT_dec (req->self);
307	}	513	}
…		…
310	SvREFCNT_dec (req->fh);	516	SvREFCNT_dec (req->fh);
311	SvREFCNT_dec (req->fh2);	517	SvREFCNT_dec (req->fh2);
312	SvREFCNT_dec (req->callback);	518	SvREFCNT_dec (req->callback);
313	Safefree (req->statdata);	519	Safefree (req->statdata);
314		520
315	if (req->type == REQ_READDIR && req->result >= 0)	521	if (req->type == REQ_READDIR)
316	free (req->data2ptr);	522	free (req->data2ptr);
317		523
318	Safefree (req);	524	Safefree (req);
319	}	525	}
320		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
321	static void req_cancel (aio_req req)	541	static void req_cancel (aio_req req)
322	{	542	{
323	req->cancelled = 1;	543	req->flags |= FLAG_CANCELLED;
324		544
325	if (req->type == REQ_GROUP)	545	req_cancel_subs (req);
326	{
327	aio_req sub;
328
329	for (sub = req->grp_first; sub; sub = sub->grp_next)
330	req_cancel (sub);
331	}
332	}
333
334	static int poll_cb ()
335	{
336	dSP;
337	int count = 0;
338	int do_croak = 0;
339	aio_req req;
340
341	for (;;)
342	{
343	pthread_mutex_lock (&reslock);
344	req = ress;
345
346	if (req)
347	{
348	ress = req->next;
349
350	if (!ress)
351	{
352	/* read any signals sent by the worker threads */
353	char buf [32];
354	while (read (respipe [0], buf, 32) == 32)
355	;
356
357	rese = 0;
358	}
359	}
360
361	pthread_mutex_unlock (&reslock);
362
363	if (!req)
364	break;
365
366	--nreqs;
367
368	if (req->type == REQ_QUIT)
369	started--;
370	else if (req->type == REQ_GROUP && req->length)
371	{
372	req->fd = 1; /* mark request as delayed */
373	continue;
374	}
375	else
376	{
377	if (req->type == REQ_READ)
378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
379
380	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381	SvREADONLY_off (req->data);
382
383	if (req->statdata)
384	{
385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
386	PL_laststatval = req->result;
387	PL_statcache = *(req->statdata);
388	}
389
390	req_invoke (req);
391
392	count++;
393	}
394
395	req_free (req);
396	}
397
398	return count;
399	}	546	}
400		547
401	static void *aio_proc(void *arg);	548	static void *aio_proc(void *arg);
402		549
403	static void start_thread (void)	550	static void start_thread (void)
404	{	551	{
405	sigset_t fullsigset, oldsigset;	552	sigset_t fullsigset, oldsigset;
406	pthread_t tid;
407	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");
408		559
409	pthread_attr_init (&attr);	560	pthread_attr_init (&attr);
410	pthread_attr_setstacksize (&attr, STACKSIZE);	561	pthread_attr_setstacksize (&attr, STACKSIZE);
411	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
412		566
413	sigfillset (&fullsigset);	567	sigfillset (&fullsigset);
		568
		569	LOCK (wrklock);
414	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
415		571
416	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;
417	started++;	578	++started;
		579	}
		580	else
		581	free (wrk);
418		582
419	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 ();
420	}	597	}
421		598
422	static void req_send (aio_req req)	599	static void req_send (aio_req req)
423	{	600	{
424	while (started < wanted && nreqs >= started)
425	start_thread ();
426
427	++nreqs;	601	++nreqs;
428		602
429	pthread_mutex_lock (&reqlock);	603	LOCK (reqlock);
430		604	++nready;
431	req->next = 0;	605	reqq_push (&req_queue, req);
432
433	if (reqe)
434	{
435	reqe->next = req;
436	reqe = req;
437	}
438	else
439	reqe = reqs = req;
440
441	pthread_cond_signal (&reqwait);	606	pthread_cond_signal (&reqwait);
442	pthread_mutex_unlock (&reqlock);	607	UNLOCK (reqlock);
443		608
444	if (nreqs > max_outstanding)	609	maybe_start_thread ();
445	for (;;)
446	{
447	poll_cb ();
448
449	if (nreqs <= max_outstanding)
450	break;
451
452	poll_wait ();
453	}
454	}	610	}
455		611
456	static void end_thread (void)	612	static void end_thread (void)
457	{	613	{
458	aio_req req;	614	aio_req req;
		615
459	Newz (0, req, 1, aio_cb);	616	Newz (0, req, 1, aio_cb);
		617
460	req->type = REQ_QUIT;	618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
461		620
462	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);
463	}	636	}
464		637
465	static void min_parallel (int nthreads)	638	static void min_parallel (int nthreads)
466	{	639	{
467	if (wanted < nthreads)	640	if (wanted < nthreads)
468	wanted = nthreads;	641	wanted = nthreads;
469	}	642	}
470		643
471	static void max_parallel (int nthreads)	644	static void max_parallel (int nthreads)
472	{	645	{
473	int cur = started;
474
475	if (wanted > nthreads)	646	if (wanted > nthreads)
476	wanted = nthreads;	647	wanted = nthreads;
477		648
478	while (cur > wanted)
479	{
480	end_thread ();
481	cur--;
482	}
483
484	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);
485	{	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
486	poll_wait ();	759	poll_wait ();
487	poll_cb ();	760
		761	++maxreqs;
488	}	762	}
		763
		764	return count;
489	}	765	}
490		766
491	static void create_pipe ()	767	static void create_pipe ()
492	{	768	{
493	if (pipe (respipe))	769	if (pipe (respipe))
…		…
517	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)
518	{	794	{
519	ssize_t res;	795	ssize_t res;
520	off_t ooffset;	796	off_t ooffset;
521		797
522	pthread_mutex_lock (&preadwritelock);	798	LOCK (preadwritelock);
523	ooffset = lseek (fd, 0, SEEK_CUR);	799	ooffset = lseek (fd, 0, SEEK_CUR);
524	lseek (fd, offset, SEEK_SET);	800	lseek (fd, offset, SEEK_SET);
525	res = read (fd, buf, count);	801	res = read (fd, buf, count);
526	lseek (fd, ooffset, SEEK_SET);	802	lseek (fd, ooffset, SEEK_SET);
527	pthread_mutex_unlock (&preadwritelock);	803	UNLOCK (preadwritelock);
528		804
529	return res;	805	return res;
530	}	806	}
531		807
532	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)
533	{	809	{
534	ssize_t res;	810	ssize_t res;
535	off_t ooffset;	811	off_t ooffset;
536		812
537	pthread_mutex_lock (&preadwritelock);	813	LOCK (preadwritelock);
538	ooffset = lseek (fd, 0, SEEK_CUR);	814	ooffset = lseek (fd, 0, SEEK_CUR);
539	lseek (fd, offset, SEEK_SET);	815	lseek (fd, offset, SEEK_SET);
540	res = write (fd, buf, count);	816	res = write (fd, buf, count);
541	lseek (fd, offset, SEEK_SET);	817	lseek (fd, offset, SEEK_SET);
542	pthread_mutex_unlock (&preadwritelock);	818	UNLOCK (preadwritelock);
543		819
544	return res;	820	return res;
545	}	821	}
546	#endif	822	#endif
547		823
548	#if !HAVE_FDATASYNC	824	#if !HAVE_FDATASYNC
549	# define fdatasync fsync	825	# define fdatasync fsync
550	#endif	826	#endif
551		827
552	#if !HAVE_READAHEAD	828	#if !HAVE_READAHEAD
553	# define readahead aio_readahead	829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
554		830
555	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)
556	{	832	{
557	char readahead_buf[4096];	833	dBUF;
558		834
559	while (count > 0)	835	while (count > 0)
560	{	836	{
561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
562		838
563	pread (fd, readahead_buf, len, offset);	839	pread (fd, aio_buf, len, offset);
564	offset += len;	840	offset += len;
565	count -= len;	841	count -= len;
566	}	842	}
567		843
568	errno = 0;	844	errno = 0;
569	}	845	}
		846
570	#endif	847	#endif
571		848
572	#if !HAVE_READDIR_R	849	#if !HAVE_READDIR_R
573	# define readdir_r aio_readdir_r	850	# define readdir_r aio_readdir_r
574		851
…		…
577	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)
578	{	855	{
579	struct dirent *e;	856	struct dirent *e;
580	int errorno;	857	int errorno;
581		858
582	pthread_mutex_lock (&readdirlock);	859	LOCK (readdirlock);
583		860
584	e = readdir (dirp);	861	e = readdir (dirp);
585	errorno = errno;	862	errorno = errno;
586		863
587	if (e)	864	if (e)
…		…
590	strcpy (ent->d_name, e->d_name);	867	strcpy (ent->d_name, e->d_name);
591	}	868	}
592	else	869	else
593	*res = 0;	870	*res = 0;
594		871
595	pthread_mutex_unlock (&readdirlock);	872	UNLOCK (readdirlock);
596		873
597	errno = errorno;	874	errno = errorno;
598	return e ? 0 : -1;	875	return e ? 0 : -1;
599	}	876	}
600	#endif	877	#endif
601		878
602	/* sendfile always needs emulation */	879	/* sendfile always needs emulation */
603	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)
604	{	881	{
605	ssize_t res;	882	ssize_t res;
606		883
607	if (!count)	884	if (!count)
608	return 0;	885	return 0;
…		…
619	{	896	{
620	off_t sbytes;	897	off_t sbytes;
621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622		899
623	if (res < 0 && sbytes)	900	if (res < 0 && sbytes)
624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
625	res = sbytes;	902	res = sbytes;
626	}	903	}
627		904
628	# elif __hpux	905	# elif __hpux
629	res = sendfile (ofd, ifd, offset, count, 0, 0);	906	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
657	#endif	934	#endif
658	)	935	)
659	)	936	)
660	{	937	{
661	/* emulate sendfile. this is a major pain in the ass */	938	/* emulate sendfile. this is a major pain in the ass */
662	char buf[4096];	939	dBUF;
		940
663	res = 0;	941	res = 0;
664		942
665	while (count)	943	while (count)
666	{	944	{
667	ssize_t cnt;	945	ssize_t cnt;
668		946
669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
670		948
671	if (cnt <= 0)	949	if (cnt <= 0)
672	{	950	{
673	if (cnt && !res) res = -1;	951	if (cnt && !res) res = -1;
674	break;	952	break;
675	}	953	}
676		954
677	cnt = write (ofd, buf, cnt);	955	cnt = write (ofd, aio_buf, cnt);
678		956
679	if (cnt <= 0)	957	if (cnt <= 0)
680	{	958	{
681	if (cnt && !res) res = -1;	959	if (cnt && !res) res = -1;
682	break;	960	break;
…		…
690		968
691	return res;	969	return res;
692	}	970	}
693		971
694	/* read a full directory */	972	/* read a full directory */
695	static int scandir_ (const char *path, void **namesp)	973	static void scandir_ (aio_req req, worker *self)
696	{	974	{
697	DIR *dirp = opendir (path);	975	DIR *dirp;
698	union	976	union
699	{	977	{
700	struct dirent d;	978	struct dirent d;
701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702	} u;	980	} *u;
703	struct dirent *entp;	981	struct dirent *entp;
704	char *name, *names;	982	char *name, *names;
705	int memlen = 4096;	983	int memlen = 4096;
706	int memofs = 0;	984	int memofs = 0;
707	int res = 0;	985	int res = 0;
708	int errorno;	986	int errorno;
709		987
710	if (!dirp)	988	LOCK (wrklock);
711	return -1;	989	self->dirp = dirp = opendir (req->dataptr);
712		990	self->dbuf = u = malloc (sizeof (*u));
713	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);
714		1044
715	for (;;)	1045	for (;;)
716	{	1046	{
717	errno = 0, readdir_r (dirp, &u.d, &entp);	1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
718		1048
719	if (!entp)	1049	LOCK (reqlock);
720	break;
721
722	name = entp->d_name;
723
724	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
725	{
726	int len = strlen (name) + 1;
727
728	res++;
729
730	while (memofs + len > memlen)
731	{
732	memlen *= 2;
733	names = realloc (names, memlen);
734	if (!names)
735	break;
736	}
737
738	memcpy (names + memofs, name, len);
739	memofs += len;
740	}
741	}
742
743	errorno = errno;
744	closedir (dirp);
745
746	if (errorno)
747	{
748	free (names);
749	errno = errorno;
750	res = -1;
751	}
752
753	*namesp = (void *)names;
754	return res;
755	}
756
757	/*****************************************************************************/
758
759	static void *aio_proc (void *thr_arg)
760	{
761	aio_req req;
762	int type;
763
764	do
765	{
766	pthread_mutex_lock (&reqlock);
767		1050
768	for (;;)	1051	for (;;)
769	{	1052	{
770	req = reqs;	1053	self->req = req = reqq_shift (&req_queue);
771
772	if (reqs)
773	{
774	reqs = reqs->next;
775	if (!reqs) reqe = 0;
776	}
777		1054
778	if (req)	1055	if (req)
779	break;	1056	break;
780		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 */
781	pthread_cond_wait (&reqwait, &reqlock);	1074	pthread_cond_wait (&reqwait, &reqlock);
		1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1076	}
		1077
		1078	--idle;
782	}	1079	}
783		1080
784	pthread_mutex_unlock (&reqlock);	1081	--nready;
		1082
		1083	UNLOCK (reqlock);
785		1084
786	errno = 0; /* strictly unnecessary */	1085	errno = 0; /* strictly unnecessary */
787		1086
788	if (!req->cancelled)	1087	if (!(req->flags & FLAG_CANCELLED))
789	switch (type = req->type) /* remember type for QUIT check */	1088	switch (req->type)
790	{	1089	{
791	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;
792	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;
793		1092
794	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;
795	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;
796		1095
797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
800		1099
…		…
803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
807	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;
808		1108
809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
810	case REQ_FSYNC: req->result = fsync (req->fd); break;	1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1111	case REQ_READDIR: scandir_ (req, self); break;
812		1112
813	case REQ_SLEEP:	1113	case REQ_BUSY:
814	{	1114	{
815	struct timeval tv;	1115	struct timeval tv;
816		1116
817	tv.tv_sec = req->fd;	1117	tv.tv_sec = req->fd;
818	tv.tv_usec = req->fd2;	1118	tv.tv_usec = req->fd2;
819		1119
820	req->result = select (0, 0, 0, 0, &tv);	1120	req->result = select (0, 0, 0, 0, &tv);
821	}	1121	}
822		1122
		1123	case REQ_GROUP:
		1124	case REQ_NOP:
		1125	break;
		1126
823	case REQ_QUIT:	1127	case REQ_QUIT:
824	break;	1128	goto quit;
825		1129
826	default:	1130	default:
827	req->result = ENOSYS;	1131	req->result = ENOSYS;
828	break;	1132	break;
829	}	1133	}
830		1134
831	req->errorno = errno;	1135	req->errorno = errno;
832		1136
833	pthread_mutex_lock (&reslock);	1137	LOCK (reslock);
834		1138
835	req->next = 0;	1139	++npending;
836		1140
837	if (rese)	1141	if (!reqq_push (&res_queue, req))
838	{
839	rese->next = req;
840	rese = req;
841	}
842	else
843	{
844	rese = ress = req;
845
846	/* write a dummy byte to the pipe so fh becomes ready */	1142	/* write a dummy byte to the pipe so fh becomes ready */
847	write (respipe [1], &respipe, 1);	1143	write (respipe [1], &respipe, 1);
848	}
849		1144
850	pthread_mutex_unlock (&reslock);	1145	self->req = 0;
		1146	worker_clear (self);
		1147
		1148	UNLOCK (reslock);
851	}	1149	}
852	while (type != REQ_QUIT);	1150
		1151	quit:
		1152	LOCK (wrklock);
		1153	worker_free (self);
		1154	UNLOCK (wrklock);
853		1155
854	return 0;	1156	return 0;
855	}	1157	}
856		1158
857	/*****************************************************************************/	1159	/*****************************************************************************/
858		1160
859	static void atfork_prepare (void)	1161	static void atfork_prepare (void)
860	{	1162	{
861	pthread_mutex_lock (&reqlock);	1163	LOCK (wrklock);
862	pthread_mutex_lock (&reslock);	1164	LOCK (reqlock);
		1165	LOCK (reslock);
863	#if !HAVE_PREADWRITE	1166	#if !HAVE_PREADWRITE
864	pthread_mutex_lock (&preadwritelock);	1167	LOCK (preadwritelock);
865	#endif	1168	#endif
866	#if !HAVE_READDIR_R	1169	#if !HAVE_READDIR_R
867	pthread_mutex_lock (&readdirlock);	1170	LOCK (readdirlock);
868	#endif	1171	#endif
869	}	1172	}
870		1173
871	static void atfork_parent (void)	1174	static void atfork_parent (void)
872	{	1175	{
873	#if !HAVE_READDIR_R	1176	#if !HAVE_READDIR_R
874	pthread_mutex_unlock (&readdirlock);	1177	UNLOCK (readdirlock);
875	#endif	1178	#endif
876	#if !HAVE_PREADWRITE	1179	#if !HAVE_PREADWRITE
877	pthread_mutex_unlock (&preadwritelock);	1180	UNLOCK (preadwritelock);
878	#endif	1181	#endif
879	pthread_mutex_unlock (&reslock);	1182	UNLOCK (reslock);
880	pthread_mutex_unlock (&reqlock);	1183	UNLOCK (reqlock);
		1184	UNLOCK (wrklock);
881	}	1185	}
882		1186
883	static void atfork_child (void)	1187	static void atfork_child (void)
884	{	1188	{
885	aio_req prv;	1189	aio_req prv;
886		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
887	started = 0;	1208	started = 0;
888		1209	idle = 0;
889	while (reqs)	1210	nreqs = 0;
890	{	1211	nready = 0;
891	prv = reqs;	1212	npending = 0;
892	reqs = prv->next;
893	req_free (prv);
894	}
895
896	reqs = reqe = 0;
897
898	while (ress)
899	{
900	prv = ress;
901	ress = prv->next;
902	req_free (prv);
903	}
904
905	ress = rese = 0;
906		1213
907	close (respipe [0]);	1214	close (respipe [0]);
908	close (respipe [1]);	1215	close (respipe [1]);
909	create_pipe ();	1216	create_pipe ();
910		1217
911	atfork_parent ();	1218	atfork_parent ();
912	}	1219	}
913		1220
914	#define dREQ \	1221	#define dREQ \
915	aio_req req; \	1222	aio_req req; \
		1223	int req_pri = next_pri; \
		1224	next_pri = DEFAULT_PRI + PRI_BIAS; \
916	\	1225	\
917	if (SvOK (callback) && !SvROK (callback)) \	1226	if (SvOK (callback) && !SvROK (callback)) \
918	croak ("callback must be undef or of reference type"); \	1227	croak ("callback must be undef or of reference type"); \
919	\	1228	\
920	Newz (0, req, 1, aio_cb); \	1229	Newz (0, req, 1, aio_cb); \
921	if (!req) \	1230	if (!req) \
922	croak ("out of memory during aio_req allocation"); \	1231	croak ("out of memory during aio_req allocation"); \
923	\	1232	\
924	req->callback = newSVsv (callback)	1233	req->callback = newSVsv (callback); \
		1234	req->pri = req_pri
925		1235
926	#define REQ_SEND \	1236	#define REQ_SEND \
927	req_send (req); \	1237	req_send (req); \
928	\	1238	\
929	if (GIMME_V != G_VOID) \	1239	if (GIMME_V != G_VOID) \
…		…
934	PROTOTYPES: ENABLE	1244	PROTOTYPES: ENABLE
935		1245
936	BOOT:	1246	BOOT:
937	{	1247	{
938	HV *stash = gv_stashpv ("IO::AIO", 1);	1248	HV *stash = gv_stashpv ("IO::AIO", 1);
		1249
939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
941	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));
942		1256
943	create_pipe ();	1257	create_pipe ();
944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
945	}	1259	}
946		1260
947	void	1261	void
948	min_parallel (nthreads)	1262	max_poll_reqs (int nreqs)
949	int nthreads
950	PROTOTYPE: $	1263	PROTOTYPE: $
		1264	CODE:
		1265	max_poll_reqs = nreqs;
951		1266
952	void	1267	void
953	max_parallel (nthreads)	1268	max_poll_time (double nseconds)
954	int nthreads
955	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);
956		1286
957	int	1287	int
958	max_outstanding (nreqs)	1288	max_outstanding (int maxreqs)
959	int nreqs	1289	PROTOTYPE: $
960	PROTOTYPE: $
961	CODE:	1290	CODE:
962	RETVAL = max_outstanding;	1291	RETVAL = max_outstanding;
963	max_outstanding = nreqs;	1292	max_outstanding = maxreqs;
		1293	OUTPUT:
		1294	RETVAL
964		1295
965	void	1296	void
966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
967	SV * pathname	1298	SV * pathname
968	int flags	1299	int flags
…		…
1183		1514
1184	REQ_SEND;	1515	REQ_SEND;
1185	}	1516	}
1186		1517
1187	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
1188	aio_sleep (delay,callback=&PL_sv_undef)	1538	aio_busy (delay,callback=&PL_sv_undef)
1189	double delay	1539	double delay
1190	SV * callback	1540	SV * callback
1191	PPCODE:	1541	PPCODE:
1192	{	1542	{
1193	dREQ;	1543	dREQ;
1194		1544
1195	req->type = REQ_SLEEP;	1545	req->type = REQ_BUSY;
1196	req->fd = delay < 0. ? 0 : delay;	1546	req->fd = delay < 0. ? 0 : delay;
1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1198		1548
1199	REQ_SEND;	1549	REQ_SEND;
1200	}	1550	}
…		…
1204	SV * callback	1554	SV * callback
1205	PROTOTYPE: ;$	1555	PROTOTYPE: ;$
1206	PPCODE:	1556	PPCODE:
1207	{	1557	{
1208	dREQ;	1558	dREQ;
		1559
1209	req->type = REQ_GROUP;	1560	req->type = REQ_GROUP;
1210	req_send (req);	1561	req_send (req);
		1562
1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1212	}	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;
1213		1599
1214	void	1600	void
1215	flush ()	1601	flush ()
1216	PROTOTYPE:	1602	PROTOTYPE:
1217	CODE:	1603	CODE:
1218	while (nreqs)	1604	while (nreqs)
1219	{	1605	{
1220	poll_wait ();	1606	poll_wait ();
1221	poll_cb ();	1607	poll_cb (0);
1222	}	1608	}
1223		1609
1224	void	1610	void
1225	poll()	1611	poll()
1226	PROTOTYPE:	1612	PROTOTYPE:
1227	CODE:	1613	CODE:
1228	if (nreqs)	1614	if (nreqs)
1229	{	1615	{
1230	poll_wait ();	1616	poll_wait ();
1231	poll_cb ();	1617	poll_cb (0);
1232	}	1618	}
1233		1619
1234	int	1620	int
1235	poll_fileno()	1621	poll_fileno()
1236	PROTOTYPE:	1622	PROTOTYPE:
…		…
1260	CODE:	1646	CODE:
1261	RETVAL = nreqs;	1647	RETVAL = nreqs;
1262	OUTPUT:	1648	OUTPUT:
1263	RETVAL	1649	RETVAL
1264		1650
1265	PROTOTYPES: DISABLE	1651	int
1266		1652	nready()
1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1268
1269	void
1270	cancel (aio_req_ornot req)
1271	PROTOTYPE:	1653	PROTOTYPE:
1272	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:
1273	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);
1274		1691
1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1276		1693
1277	void	1694	void
1278	add (aio_req grp, ...)	1695	add (aio_req grp, ...)
1279	PPCODE:	1696	PPCODE:
1280	{	1697	{
1281	int i;	1698	int i;
		1699	aio_req req;
1282		1700
1283	if (grp->fd == 2)	1701	if (grp->fd == 2)
1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1285		1703
1286	for (i = 1; i < items; ++i )	1704	for (i = 1; i < items; ++i )
1287	{	1705	{
1288	if (GIMME_V != G_VOID)	1706	if (GIMME_V != G_VOID)
1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1290		1708
1291	aio_req req = SvAIO_REQ (ST (i));	1709	req = SvAIO_REQ (ST (i));
1292		1710
1293	if (req)	1711	if (req)
1294	{	1712	{
1295	++grp->length;	1713	++grp->length;
1296	req->grp = grp;	1714	req->grp = grp;
…		…
1305	}	1723	}
1306	}	1724	}
1307	}	1725	}
1308		1726
1309	void	1727	void
		1728	cancel_subs (aio_req_ornot req)
		1729	CODE:
		1730	req_cancel_subs (req);
		1731
		1732	void
1310	result (aio_req grp, ...)	1733	result (aio_req grp, ...)
1311	CODE:	1734	CODE:
1312	{	1735	{
1313	int i;	1736	int i;
		1737	AV *av;
		1738
		1739	grp->errorno = errno;
		1740
1314	AV *av = newAV ();	1741	av = newAV ();
1315		1742
1316	for (i = 1; i < items; ++i )	1743	for (i = 1; i < items; ++i )
1317	av_push (av, newSVsv (ST (i)));	1744	av_push (av, newSVsv (ST (i)));
1318		1745
1319	SvREFCNT_dec (grp->data);	1746	SvREFCNT_dec (grp->data);
1320	grp->data = (SV *)av;	1747	grp->data = (SV *)av;
1321	}	1748	}
1322		1749
1323	void	1750	void
1324	lock (aio_req grp)	1751	errno (aio_req grp, int errorno = errno)
1325	CODE:	1752	CODE:
1326	++grp->length;	1753	grp->errorno = errorno;
1327		1754
1328	void	1755	void
1329	unlock (aio_req grp)
1330	CODE:
1331	aio_grp_dec (grp);
1332
1333	void
1334	feeder_limit (aio_req grp, int limit)	1756	limit (aio_req grp, int limit)
1335	CODE:	1757	CODE:
1336	grp->fd2 = limit;	1758	grp->fd2 = limit;
1337	aio_grp_feed (grp);	1759	aio_grp_feed (grp);
1338		1760
1339	void	1761	void
1340	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1762	feed (aio_req grp, SV *callback=&PL_sv_undef)
1341	CODE:	1763	CODE:
1342	{	1764	{
1343	SvREFCNT_dec (grp->fh2);	1765	SvREFCNT_dec (grp->fh2);
1344	grp->fh2 = newSVsv (callback);	1766	grp->fh2 = newSVsv (callback);
1345		1767

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