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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.79 by root, Thu Oct 26 16:28:33 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
13	#include <errno.h>	22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
14	#include <sys/types.h>	25	#include <sys/types.h>
15	#include <sys/stat.h>	26	#include <sys/stat.h>
16	#include <limits.h>	27	#include <limits.h>
17	#include <unistd.h>	28	#include <unistd.h>
18	#include <fcntl.h>	29	#include <fcntl.h>
…		…
37	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	49	#ifndef NAME_MAX
39	# define NAME_MAX 4096	50	# define NAME_MAX 4096
40	#endif	51	#endif
41		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
42	#if __ia64	58	#if __ia64
43	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	62	#else
45	# define STACKSIZE 8192	63	# define STACKSIZE 16384
46	#endif	64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
		75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
47		88
48	enum {	89	enum {
49	REQ_QUIT,	90	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	97	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
58	};	101	};
59		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
60	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
61	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
62		109
63	int type;	110	SV *data, *callback;
64		111	SV *fh, *fh2;
65	/* should receive a cleanup, with unions */	112	void *dataptr, *data2ptr;
66	int fd, fd2;	113	Stat_t *statdata;
67	off_t offset;	114	off_t offset;
68	size_t length;	115	size_t length;
69	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
70	mode_t mode; /* open */	122	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76		123
77	Stat_t *statdata;	124	unsigned char flags;
		125	unsigned char pri;
		126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
78	} aio_cb;	129	} aio_cb;
79		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
80	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
81		137
		138	enum {
		139	PRI_MIN = -4,
		140	PRI_MAX = 4,
		141
		142	DEFAULT_PRI = 0,
		143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		145	};
		146
		147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		148
82	static int started, wanted;	149	static unsigned int started, wanted;
83	static volatile int nreqs;	150	static volatile unsigned int nreqs, nready, npending;
84	static int max_outstanding = 1<<30;	151	static volatile unsigned int max_outstanding = 0xffffffff;
85	static int respipe [2];	152	static int respipe [2];
86		153
		154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		156	#else
		157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		158	#endif
		159
		160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		162
		163	/* worker threads management */
		164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		165
		166	typedef struct worker {
		167	/* locked by wrklock */
		168	struct worker *prev, *next;
		169
		170	pthread_t tid;
		171
		172	/* locked by reslock, reqlock or wrklock */
		173	aio_req req; /* currently processed request */
		174	void *dbuf;
		175	DIR *dirp;
		176	} worker;
		177
		178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		179
		180	static void worker_clear (worker *wrk)
		181	{
		182	if (wrk->dirp)
		183	{
		184	closedir (wrk->dirp);
		185	wrk->dirp = 0;
		186	}
		187
		188	if (wrk->dbuf)
		189	{
		190	free (wrk->dbuf);
		191	wrk->dbuf = 0;
		192	}
		193	}
		194
		195	static void worker_free (worker *wrk)
		196	{
		197	wrk->next->prev = wrk->prev;
		198	wrk->prev->next = wrk->next;
		199
		200	free (wrk);
		201	}
		202
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	203	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	205	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		206
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	207	/*
92	static volatile aio_req ress, rese; /* queue start, queue end */	208	* a somewhat faster data structure might be nice, but
		209	* with 8 priorities this actually needs <20 insns
		210	* per shift, the most expensive operation.
		211	*/
		212	typedef struct {
		213	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		214	int size;
		215	} reqq;
93		216
		217	static reqq req_queue;
		218	static reqq res_queue;
		219
		220	int reqq_push (reqq *q, aio_req req)
		221	{
		222	int pri = req->pri;
		223	req->next = 0;
		224
		225	if (q->qe[pri])
		226	{
		227	q->qe[pri]->next = req;
		228	q->qe[pri] = req;
		229	}
		230	else
		231	q->qe[pri] = q->qs[pri] = req;
		232
		233	return q->size++;
		234	}
		235
		236	aio_req reqq_shift (reqq *q)
		237	{
		238	int pri;
		239
		240	if (!q->size)
		241	return 0;
		242
		243	--q->size;
		244
		245	for (pri = NUM_PRI; pri--; )
		246	{
		247	aio_req req = q->qs[pri];
		248
		249	if (req)
		250	{
		251	if (!(q->qs[pri] = req->next))
		252	q->qe[pri] = 0;
		253
		254	return req;
		255	}
		256	}
		257
		258	abort ();
		259	}
		260
		261	static int poll_cb (int max);
		262	static void req_invoke (aio_req req);
94	static void free_req (aio_req req)	263	static void req_free (aio_req req);
95	{	264	static void req_cancel (aio_req req);
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		265
		266	/* must be called at most once */
		267	static SV *req_sv (aio_req req, const char *klass)
		268	{
99	if (req->fh)	269	if (!req->self)
100	SvREFCNT_dec (req->fh);	270	{
		271	req->self = (SV *)newHV ();
		272	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		273	}
101		274
102	if (req->fh2)	275	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		276	}
		277
		278	static aio_req SvAIO_REQ (SV *sv)
		279	{
		280	MAGIC *mg;
		281
		282	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		283	croak ("object of class " AIO_REQ_KLASS " expected");
		284
		285	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		286
		287	return mg ? (aio_req)mg->mg_ptr : 0;
		288	}
		289
		290	static void aio_grp_feed (aio_req grp)
		291	{
		292	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		293	{
		294	int old_len = grp->length;
		295
		296	if (grp->fh2 && SvOK (grp->fh2))
		297	{
		298	dSP;
		299
		300	ENTER;
		301	SAVETMPS;
		302	PUSHMARK (SP);
		303	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		304	PUTBACK;
		305	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		306	SPAGAIN;
		307	FREETMPS;
		308	LEAVE;
		309	}
		310
		311	/* stop if no progress has been made */
		312	if (old_len == grp->length)
		313	{
103	SvREFCNT_dec (req->fh2);	314	SvREFCNT_dec (grp->fh2);
104		315	grp->fh2 = 0;
105	if (req->statdata)	316	break;
106	Safefree (req->statdata);	317	}
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113
114	Safefree (req);
115	}
116
117	static void
118	poll_wait ()
119	{
120	if (nreqs && !ress)
121	{	318	}
		319	}
		320
		321	static void aio_grp_dec (aio_req grp)
		322	{
		323	--grp->length;
		324
		325	/* call feeder, if applicable */
		326	aio_grp_feed (grp);
		327
		328	/* finish, if done */
		329	if (!grp->length && grp->fd)
		330	{
		331	req_invoke (grp);
		332	req_free (grp);
		333	}
		334	}
		335
		336	static void poll_wait ()
		337	{
122	fd_set rfd;	338	fd_set rfd;
		339
		340	while (nreqs)
		341	{
		342	int size;
		343	if (WORDREAD_UNSAFE) LOCK (reslock);
		344	size = res_queue.size;
		345	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		346
		347	if (size)
		348	return;
		349
123	FD_ZERO(&rfd);	350	FD_ZERO(&rfd);
124	FD_SET(respipe [0], &rfd);	351	FD_SET(respipe [0], &rfd);
125		352
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	353	select (respipe [0] + 1, &rfd, 0, 0, 0);
127	}	354	}
128	}	355	}
129		356
130	static int	357	static void req_invoke (aio_req req)
131	poll_cb ()	358	{
		359	dSP;
		360
		361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		362	{
		363	ENTER;
		364	SAVETMPS;
		365	PUSHMARK (SP);
		366	EXTEND (SP, 1);
		367
		368	switch (req->type)
		369	{
		370	case REQ_READDIR:
		371	{
		372	SV *rv = &PL_sv_undef;
		373
		374	if (req->result >= 0)
		375	{
		376	int i;
		377	char *buf = req->data2ptr;
		378	AV *av = newAV ();
		379
		380	av_extend (av, req->result - 1);
		381
		382	for (i = 0; i < req->result; ++i)
		383	{
		384	SV *sv = newSVpv (buf, 0);
		385
		386	av_store (av, i, sv);
		387	buf += SvCUR (sv) + 1;
		388	}
		389
		390	rv = sv_2mortal (newRV_noinc ((SV *)av));
		391	}
		392
		393	PUSHs (rv);
		394	}
		395	break;
		396
		397	case REQ_OPEN:
		398	{
		399	/* convert fd to fh */
		400	SV *fh;
		401
		402	PUSHs (sv_2mortal (newSViv (req->result)));
		403	PUTBACK;
		404	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		405	SPAGAIN;
		406
		407	fh = SvREFCNT_inc (POPs);
		408
		409	PUSHMARK (SP);
		410	XPUSHs (sv_2mortal (fh));
		411	}
		412	break;
		413
		414	case REQ_GROUP:
		415	req->fd = 2; /* mark group as finished */
		416
		417	if (req->data)
		418	{
		419	int i;
		420	AV *av = (AV *)req->data;
		421
		422	EXTEND (SP, AvFILL (av) + 1);
		423	for (i = 0; i <= AvFILL (av); ++i)
		424	PUSHs (*av_fetch (av, i, 0));
		425	}
		426	break;
		427
		428	case REQ_NOP:
		429	case REQ_BUSY:
		430	break;
		431
		432	default:
		433	PUSHs (sv_2mortal (newSViv (req->result)));
		434	break;
		435	}
		436
		437	errno = req->errorno;
		438
		439	PUTBACK;
		440	call_sv (req->callback, G_VOID | G_EVAL);
		441	SPAGAIN;
		442
		443	FREETMPS;
		444	LEAVE;
		445	}
		446
		447	if (req->grp)
		448	{
		449	aio_req grp = req->grp;
		450
		451	/* unlink request */
		452	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		453	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		454
		455	if (grp->grp_first == req)
		456	grp->grp_first = req->grp_next;
		457
		458	aio_grp_dec (grp);
		459	}
		460
		461	if (SvTRUE (ERRSV))
		462	{
		463	req_free (req);
		464	croak (0);
		465	}
		466	}
		467
		468	static void req_free (aio_req req)
		469	{
		470	if (req->self)
		471	{
		472	sv_unmagic (req->self, PERL_MAGIC_ext);
		473	SvREFCNT_dec (req->self);
		474	}
		475
		476	SvREFCNT_dec (req->data);
		477	SvREFCNT_dec (req->fh);
		478	SvREFCNT_dec (req->fh2);
		479	SvREFCNT_dec (req->callback);
		480	Safefree (req->statdata);
		481
		482	if (req->type == REQ_READDIR)
		483	free (req->data2ptr);
		484
		485	Safefree (req);
		486	}
		487
		488	static void req_cancel_subs (aio_req grp)
		489	{
		490	aio_req sub;
		491
		492	if (grp->type != REQ_GROUP)
		493	return;
		494
		495	SvREFCNT_dec (grp->fh2);
		496	grp->fh2 = 0;
		497
		498	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		499	req_cancel (sub);
		500	}
		501
		502	static void req_cancel (aio_req req)
		503	{
		504	req->flags |= FLAG_CANCELLED;
		505
		506	req_cancel_subs (req);
		507	}
		508
		509	static int poll_cb (int max)
132	{	510	{
133	dSP;	511	dSP;
134	int count = 0;	512	int count = 0;
135	int do_croak = 0;	513	int do_croak = 0;
136	aio_req req;	514	aio_req req;
137		515
138	for (;;)	516	for (;;)
139	{	517	{
140	pthread_mutex_lock (&reslock);	518	while (max <= 0 || count < max)
141	req = ress;
142
143	if (req)
144	{	519	{
145	ress = req->next;	520	LOCK (reslock);
		521	req = reqq_shift (&res_queue);
146		522
147	if (!ress)	523	if (req)
148	{	524	{
		525	--npending;
		526
		527	if (!res_queue.size)
		528	{
149	/* read any signals sent by the worker threads */	529	/* read any signals sent by the worker threads */
150	char buf [32];	530	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)	531	while (read (respipe [0], buf, 32) == 32)
		532	;
152	;	533	}
153
154	rese = 0;
155	}	534	}
156	}
157		535
158	pthread_mutex_unlock (&reslock);	536	UNLOCK (reslock);
159		537
160	if (!req)	538	if (!req)
161	break;	539	break;
162		540
163	nreqs--;	541	--nreqs;
164		542
165	if (req->type == REQ_QUIT)	543	if (req->type == REQ_QUIT)
166	started--;	544	--started;
167	else	545	else if (req->type == REQ_GROUP && req->length)
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{	546	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	547	req->fd = 1; /* mark request as delayed */
181	PL_laststatval = req->result;	548	continue;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}	549	}
211	else	550	else
212	{	551	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)	552	if (req->type == REQ_READ)
		553	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		554
		555	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		556	SvREADONLY_off (req->data);
		557
		558	if (req->statdata)
216	{	559	{
217	/* convert fd to fh */	560	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
218	SV *fh;	561	PL_laststatval = req->result;
219		562	PL_statcache = *(req->statdata);
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}	563	}
		564
		565	req_invoke (req);
		566
		567	count++;
229	}	568	}
230		569
231	if (SvOK (req->callback))	570	req_free (req);
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}	571	}
249		572
250	free_req (req);	573	if (nreqs <= max_outstanding)
		574	break;
		575
		576	poll_wait ();
		577
		578	max = 0;
251	}	579	}
252		580
253	return count;	581	return count;
254	}	582	}
255		583
256	static void *aio_proc(void *arg);	584	static void *aio_proc(void *arg);
257		585
258	static void
259	start_thread (void)	586	static void start_thread (void)
260	{	587	{
261	sigset_t fullsigset, oldsigset;	588	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;	589	pthread_attr_t attr;
		590
		591	worker *wrk = calloc (1, sizeof (worker));
		592
		593	if (!wrk)
		594	croak ("unable to allocate worker thread data");
264		595
265	pthread_attr_init (&attr);	596	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);	597	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268		599
269	sigfillset (&fullsigset);	600	sigfillset (&fullsigset);
		601
		602	LOCK (wrklock);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271		604
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	605	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		606	{
		607	wrk->prev = &wrk_first;
		608	wrk->next = wrk_first.next;
		609	wrk_first.next->prev = wrk;
		610	wrk_first.next = wrk;
273	started++;	611	++started;
		612	}
		613	else
		614	free (wrk);
274		615
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);	616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		617	UNLOCK (wrklock);
276	}	618	}
277		619
278	static void	620	static void req_send (aio_req req)
279	send_req (aio_req req)
280	{	621	{
281	while (started < wanted && nreqs >= started)	622	while (started < wanted && nreqs >= started)
282	start_thread ();	623	start_thread ();
283		624
284	nreqs++;	625	++nreqs;
285		626
286	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
287		628	++nready;
288	req->next = 0;	629	reqq_push (&req_queue, req);
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}	632	}
312		633
313	static void	634	static void end_thread (void)
314	end_thread (void)
315	{	635	{
316	aio_req req;	636	aio_req req;
		637
317	Newz (0, req, 1, aio_cb);	638	Newz (0, req, 1, aio_cb);
		639
318	req->type = REQ_QUIT;	640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
319		642
320	send_req (req);	643	req_send (req);
321	}	644	}
322		645
323	static void min_parallel (int nthreads)	646	static void min_parallel (int nthreads)
324	{	647	{
325	if (wanted < nthreads)	648	if (wanted < nthreads)
…		…
340	}	663	}
341		664
342	while (started > wanted)	665	while (started > wanted)
343	{	666	{
344	poll_wait ();	667	poll_wait ();
345	poll_cb ();	668	poll_cb (0);
346	}	669	}
347	}	670	}
348		671
349	static void create_pipe ()	672	static void create_pipe ()
350	{	673	{
…		…
370	* normal read/write by using a mutex. slows down execution a lot,	693	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	694	* but that's your problem, not mine.
372	*/	695	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	696	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		697
375	static ssize_t	698	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	699	{
378	ssize_t res;	700	ssize_t res;
379	off_t ooffset;	701	off_t ooffset;
380		702
381	pthread_mutex_lock (&preadwritelock);	703	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	704	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	705	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	706	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	707	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);	708	UNLOCK (preadwritelock);
387		709
388	return res;	710	return res;
389	}	711	}
390		712
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	713	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	714	{
394	ssize_t res;	715	ssize_t res;
395	off_t ooffset;	716	off_t ooffset;
396		717
397	pthread_mutex_lock (&preadwritelock);	718	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	719	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	720	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	721	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	722	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);	723	UNLOCK (preadwritelock);
403		724
404	return res;	725	return res;
405	}	726	}
406	#endif	727	#endif
407		728
408	#if !HAVE_FDATASYNC	729	#if !HAVE_FDATASYNC
409	# define fdatasync fsync	730	# define fdatasync fsync
410	#endif	731	#endif
411		732
412	#if !HAVE_READAHEAD	733	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
414		735
415	static ssize_t	736	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
416	readahead (int fd, off_t offset, size_t count)
417	{	737	{
418	char readahead_buf[4096];	738	dBUF;
419		739
420	while (count > 0)	740	while (count > 0)
421	{	741	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		743
424	pread (fd, readahead_buf, len, offset);	744	pread (fd, aio_buf, len, offset);
425	offset += len;	745	offset += len;
426	count -= len;	746	count -= len;
427	}	747	}
428		748
429	errno = 0;	749	errno = 0;
430	}	750	}
		751
431	#endif	752	#endif
432		753
433	#if !HAVE_READDIR_R	754	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r	755	# define readdir_r aio_readdir_r
435		756
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	757	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437		758
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	759	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{	760	{
441	struct dirent *e;	761	struct dirent *e;
442	int errorno;	762	int errorno;
443		763
444	pthread_mutex_lock (&readdirlock);	764	LOCK (readdirlock);
445		765
446	e = readdir (dirp);	766	e = readdir (dirp);
447	errorno = errno;	767	errorno = errno;
448		768
449	if (e)	769	if (e)
…		…
452	strcpy (ent->d_name, e->d_name);	772	strcpy (ent->d_name, e->d_name);
453	}	773	}
454	else	774	else
455	*res = 0;	775	*res = 0;
456		776
457	pthread_mutex_unlock (&readdirlock);	777	UNLOCK (readdirlock);
458		778
459	errno = errorno;	779	errno = errorno;
460	return e ? 0 : -1;	780	return e ? 0 : -1;
461	}	781	}
462	#endif	782	#endif
463		783
464	/* sendfile always needs emulation */	784	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	785	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
467	{	786	{
468	ssize_t res;	787	ssize_t res;
469		788
470	if (!count)	789	if (!count)
471	return 0;	790	return 0;
…		…
482	{	801	{
483	off_t sbytes;	802	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485		804
486	if (res < 0 && sbytes)	805	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
488	res = sbytes;	807	res = sbytes;
489	}	808	}
490		809
491	# elif __hpux	810	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);	811	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
520	#endif	839	#endif
521	)	840	)
522	)	841	)
523	{	842	{
524	/* emulate sendfile. this is a major pain in the ass */	843	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];	844	dBUF;
		845
526	res = 0;	846	res = 0;
527		847
528	while (count)	848	while (count)
529	{	849	{
530	ssize_t cnt;	850	ssize_t cnt;
531		851
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
533		853
534	if (cnt <= 0)	854	if (cnt <= 0)
535	{	855	{
536	if (cnt && !res) res = -1;	856	if (cnt && !res) res = -1;
537	break;	857	break;
538	}	858	}
539		859
540	cnt = write (ofd, buf, cnt);	860	cnt = write (ofd, aio_buf, cnt);
541		861
542	if (cnt <= 0)	862	if (cnt <= 0)
543	{	863	{
544	if (cnt && !res) res = -1;	864	if (cnt && !res) res = -1;
545	break;	865	break;
…		…
553		873
554	return res;	874	return res;
555	}	875	}
556		876
557	/* read a full directory */	877	/* read a full directory */
558	static int	878	static void scandir_ (aio_req req, worker *self)
559	scandir_ (const char *path, void **namesp)
560	{	879	{
561	DIR *dirp = opendir (path);	880	DIR *dirp;
562	union	881	union
563	{	882	{
564	struct dirent d;	883	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;	885	} *u;
567	struct dirent *entp;	886	struct dirent *entp;
568	char *name, *names;	887	char *name, *names;
569	int memlen = 4096;	888	int memlen = 4096;
570	int memofs = 0;	889	int memofs = 0;
571	int res = 0;	890	int res = 0;
572	int errorno;	891	int errorno;
573		892
574	if (!dirp)	893	LOCK (wrklock);
575	return -1;	894	self->dirp = dirp = opendir (req->dataptr);
576		895	self->dbuf = u = malloc (sizeof (*u));
577	names = malloc (memlen);	896	req->data2ptr = names = malloc (memlen);
		897	UNLOCK (wrklock);
578		898
		899	if (dirp && u && names)
579	for (;;)	900	for (;;)
580	{	901	{
		902	errno = 0;
581	errno = 0, readdir_r (dirp, &u.d, &entp);	903	readdir_r (dirp, &u->d, &entp);
582		904
583	if (!entp)	905	if (!entp)
584	break;	906	break;
585		907
586	name = entp->d_name;	908	name = entp->d_name;
587		909
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{	911	{
590	int len = strlen (name) + 1;	912	int len = strlen (name) + 1;
591		913
592	res++;	914	res++;
593		915
594	while (memofs + len > memlen)	916	while (memofs + len > memlen)
595	{	917	{
596	memlen *= 2;	918	memlen *= 2;
		919	LOCK (wrklock);
597	names = realloc (names, memlen);	920	req->data2ptr = names = realloc (names, memlen);
		921	UNLOCK (wrklock);
		922
598	if (!names)	923	if (!names)
599	break;	924	break;
600	}	925	}
601		926
602	memcpy (names + memofs, name, len);	927	memcpy (names + memofs, name, len);
603	memofs += len;	928	memofs += len;
604	}	929	}
605	}	930	}
606		931
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)	932	if (errno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;	933	res = -1;
615	}	934
616		935	req->result = res;
617	*namesp = (void *)names;
618	return res;
619	}	936	}
620		937
621	/*****************************************************************************/	938	/*****************************************************************************/
622		939
623	static void *
624	aio_proc (void *thr_arg)	940	static void *aio_proc (void *thr_arg)
625	{	941	{
626	aio_req req;	942	aio_req req;
627	int type;	943	int type;
		944	worker *self = (worker *)thr_arg;
628		945
629	do	946	do
630	{	947	{
631	pthread_mutex_lock (&reqlock);	948	LOCK (reqlock);
632		949
633	for (;;)	950	for (;;)
634	{	951	{
635	req = reqs;	952	self->req = req = reqq_shift (&req_queue);
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642		953
643	if (req)	954	if (req)
644	break;	955	break;
645		956
646	pthread_cond_wait (&reqwait, &reqlock);	957	pthread_cond_wait (&reqwait, &reqlock);
647	}	958	}
648		959
649	pthread_mutex_unlock (&reqlock);	960	--nready;
		961
		962	UNLOCK (reqlock);
650		963
651	errno = 0; /* strictly unnecessary */	964	errno = 0; /* strictly unnecessary */
		965	type = req->type; /* remember type for QUIT check */
652		966
653	type = req->type;	967	if (!(req->flags & FLAG_CANCELLED))
654
655	switch (type)	968	switch (type)
656	{	969	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	970	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	971	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659		972
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	973	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	974	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
662		975
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666		979
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	980	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;	981	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	982	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	983	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	984	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674		987
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;	989	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	990	case REQ_READDIR: scandir_ (req, self); break;
678		991
		992	case REQ_BUSY:
		993	{
		994	struct timeval tv;
		995
		996	tv.tv_sec = req->fd;
		997	tv.tv_usec = req->fd2;
		998
		999	req->result = select (0, 0, 0, 0, &tv);
		1000	}
		1001
		1002	case REQ_GROUP:
		1003	case REQ_NOP:
679	case REQ_QUIT:	1004	case REQ_QUIT:
680	break;	1005	break;
681		1006
682	default:	1007	default:
683	req->result = ENOSYS;	1008	req->result = ENOSYS;
684	break;	1009	break;
685	}	1010	}
686		1011
687	req->errorno = errno;	1012	req->errorno = errno;
688		1013
689	pthread_mutex_lock (&reslock);	1014	LOCK (reslock);
690		1015
691	req->next = 0;	1016	++npending;
692		1017
693	if (rese)	1018	if (!reqq_push (&res_queue, req))
694	{
695	rese->next = req;
696	rese = req;
697	}
698	else
699	{
700	rese = ress = req;
701
702	/* write a dummy byte to the pipe so fh becomes ready */	1019	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);	1020	write (respipe [1], &respipe, 1);
704	}
705		1021
706	pthread_mutex_unlock (&reslock);	1022	self->req = 0;
		1023	worker_clear (self);
		1024
		1025	UNLOCK (reslock);
707	}	1026	}
708	while (type != REQ_QUIT);	1027	while (type != REQ_QUIT);
709		1028
		1029	LOCK (wrklock);
		1030	worker_free (self);
		1031	UNLOCK (wrklock);
		1032
710	return 0;	1033	return 0;
711	}	1034	}
712		1035
713	/*****************************************************************************/	1036	/*****************************************************************************/
714		1037
715	static void atfork_prepare (void)	1038	static void atfork_prepare (void)
716	{	1039	{
717	pthread_mutex_lock (&reqlock);	1040	LOCK (wrklock);
718	pthread_mutex_lock (&reslock);	1041	LOCK (reqlock);
		1042	LOCK (reslock);
719	#if !HAVE_PREADWRITE	1043	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);	1044	LOCK (preadwritelock);
721	#endif	1045	#endif
722	#if !HAVE_READDIR_R	1046	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);	1047	LOCK (readdirlock);
724	#endif	1048	#endif
725	}	1049	}
726		1050
727	static void atfork_parent (void)	1051	static void atfork_parent (void)
728	{	1052	{
729	#if !HAVE_READDIR_R	1053	#if !HAVE_READDIR_R
730	pthread_mutex_unlock (&readdirlock);	1054	UNLOCK (readdirlock);
731	#endif	1055	#endif
732	#if !HAVE_PREADWRITE	1056	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);	1057	UNLOCK (preadwritelock);
734	#endif	1058	#endif
735	pthread_mutex_unlock (&reslock);	1059	UNLOCK (reslock);
736	pthread_mutex_unlock (&reqlock);	1060	UNLOCK (reqlock);
		1061	UNLOCK (wrklock);
737	}	1062	}
738		1063
739	static void atfork_child (void)	1064	static void atfork_child (void)
740	{	1065	{
741	aio_req prv;	1066	aio_req prv;
742		1067
		1068	while (prv = reqq_shift (&req_queue))
		1069	req_free (prv);
		1070
		1071	while (prv = reqq_shift (&res_queue))
		1072	req_free (prv);
		1073
		1074	while (wrk_first.next != &wrk_first)
		1075	{
		1076	worker *wrk = wrk_first.next;
		1077
		1078	if (wrk->req)
		1079	req_free (wrk->req);
		1080
		1081	worker_clear (wrk);
		1082	worker_free (wrk);
		1083	}
		1084
743	started = 0;	1085	started = 0;
744		1086	nreqs = 0;
745	while (reqs)
746	{
747	prv = reqs;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762		1087
763	close (respipe [0]);	1088	close (respipe [0]);
764	close (respipe [1]);	1089	close (respipe [1]);
765	create_pipe ();	1090	create_pipe ();
766		1091
767	atfork_parent ();	1092	atfork_parent ();
768	}	1093	}
769		1094
770	#define dREQ \	1095	#define dREQ \
771	aio_req req; \	1096	aio_req req; \
		1097	int req_pri = next_pri; \
		1098	next_pri = DEFAULT_PRI + PRI_BIAS; \
772	\	1099	\
773	if (SvOK (callback) && !SvROK (callback)) \	1100	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \	1101	croak ("callback must be undef or of reference type"); \
775	\	1102	\
776	Newz (0, req, 1, aio_cb); \	1103	Newz (0, req, 1, aio_cb); \
777	if (!req) \	1104	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	1105	croak ("out of memory during aio_req allocation"); \
779	\	1106	\
780	req->callback = newSVsv (callback);	1107	req->callback = newSVsv (callback); \
		1108	req->pri = req_pri
		1109
		1110	#define REQ_SEND \
		1111	req_send (req); \
		1112	\
		1113	if (GIMME_V != G_VOID) \
		1114	XPUSHs (req_sv (req, AIO_REQ_KLASS));
781		1115
782	MODULE = IO::AIO PACKAGE = IO::AIO	1116	MODULE = IO::AIO PACKAGE = IO::AIO
783		1117
784	PROTOTYPES: ENABLE	1118	PROTOTYPES: ENABLE
785		1119
…		…
793	create_pipe ();	1127	create_pipe ();
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
795	}	1129	}
796		1130
797	void	1131	void
798	min_parallel (nthreads)	1132	min_parallel (int nthreads)
799	int nthreads
800	PROTOTYPE: $	1133	PROTOTYPE: $
801		1134
802	void	1135	void
803	max_parallel (nthreads)	1136	max_parallel (int nthreads)
804	int nthreads
805	PROTOTYPE: $	1137	PROTOTYPE: $
806		1138
807	int	1139	int
808	max_outstanding (nreqs)	1140	max_outstanding (int maxreqs)
809	int nreqs	1141	PROTOTYPE: $
810	PROTOTYPE: $
811	CODE:	1142	CODE:
812	RETVAL = max_outstanding;	1143	RETVAL = max_outstanding;
813	max_outstanding = nreqs;	1144	max_outstanding = maxreqs;
		1145	OUTPUT:
		1146	RETVAL
814		1147
815	void	1148	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
817	SV * pathname	1150	SV * pathname
818	int flags	1151	int flags
819	int mode	1152	int mode
820	SV * callback	1153	SV * callback
821	PROTOTYPE: $$$;$	1154	PROTOTYPE: $$$;$
822	CODE:	1155	PPCODE:
823	{	1156	{
824	dREQ;	1157	dREQ;
825		1158
826	req->type = REQ_OPEN;	1159	req->type = REQ_OPEN;
827	req->data = newSVsv (pathname);	1160	req->data = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	1161	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1162	req->fd = flags;
830	req->mode = mode;	1163	req->mode = mode;
831		1164
832	send_req (req);	1165	REQ_SEND;
833	}	1166	}
834		1167
835	void	1168	void
836	aio_close (fh,callback=&PL_sv_undef)	1169	aio_close (fh,callback=&PL_sv_undef)
837	SV * fh	1170	SV * fh
…		…
839	PROTOTYPE: $;$	1172	PROTOTYPE: $;$
840	ALIAS:	1173	ALIAS:
841	aio_close = REQ_CLOSE	1174	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1175	aio_fsync = REQ_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1176	aio_fdatasync = REQ_FDATASYNC
844	CODE:	1177	PPCODE:
845	{	1178	{
846	dREQ;	1179	dREQ;
847		1180
848	req->type = ix;	1181	req->type = ix;
849	req->fh = newSVsv (fh);	1182	req->fh = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1183	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
851		1184
852	send_req (req);	1185	REQ_SEND (req);
853	}	1186	}
854		1187
855	void	1188	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1189	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
857	SV * fh	1190	SV * fh
…		…
862	SV * callback	1195	SV * callback
863	ALIAS:	1196	ALIAS:
864	aio_read = REQ_READ	1197	aio_read = REQ_READ
865	aio_write = REQ_WRITE	1198	aio_write = REQ_WRITE
866	PROTOTYPE: $$$$$;$	1199	PROTOTYPE: $$$$$;$
867	CODE:	1200	PPCODE:
868	{	1201	{
869	aio_req req;	1202	aio_req req;
870	STRLEN svlen;	1203	STRLEN svlen;
871	char *svptr = SvPVbyte (data, svlen);	1204	char *svptr = SvPVbyte (data, svlen);
872		1205
…		…
910	{	1243	{
911	SvREADONLY_on (data);	1244	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1245	req->data2ptr = (void *)data;
913	}	1246	}
914		1247
915	send_req (req);	1248	REQ_SEND;
916	}	1249	}
917	}	1250	}
918		1251
919	void	1252	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1253	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
…		…
922	SV * in_fh	1255	SV * in_fh
923	UV in_offset	1256	UV in_offset
924	UV length	1257	UV length
925	SV * callback	1258	SV * callback
926	PROTOTYPE: $$$$;$	1259	PROTOTYPE: $$$$;$
927	CODE:	1260	PPCODE:
928	{	1261	{
929	dREQ;	1262	dREQ;
930		1263
931	req->type = REQ_SENDFILE;	1264	req->type = REQ_SENDFILE;
932	req->fh = newSVsv (out_fh);	1265	req->fh = newSVsv (out_fh);
…		…
934	req->fh2 = newSVsv (in_fh);	1267	req->fh2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1268	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;	1269	req->offset = in_offset;
937	req->length = length;	1270	req->length = length;
938		1271
939	send_req (req);	1272	REQ_SEND;
940	}	1273	}
941		1274
942	void	1275	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1276	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
944	SV * fh	1277	SV * fh
945	UV offset	1278	UV offset
946	IV length	1279	IV length
947	SV * callback	1280	SV * callback
948	PROTOTYPE: $$$;$	1281	PROTOTYPE: $$$;$
949	CODE:	1282	PPCODE:
950	{	1283	{
951	dREQ;	1284	dREQ;
952		1285
953	req->type = REQ_READAHEAD;	1286	req->type = REQ_READAHEAD;
954	req->fh = newSVsv (fh);	1287	req->fh = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1288	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;	1289	req->offset = offset;
957	req->length = length;	1290	req->length = length;
958		1291
959	send_req (req);	1292	REQ_SEND;
960	}	1293	}
961		1294
962	void	1295	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1296	aio_stat (fh_or_path,callback=&PL_sv_undef)
964	SV * fh_or_path	1297	SV * fh_or_path
965	SV * callback	1298	SV * callback
966	ALIAS:	1299	ALIAS:
967	aio_stat = REQ_STAT	1300	aio_stat = REQ_STAT
968	aio_lstat = REQ_LSTAT	1301	aio_lstat = REQ_LSTAT
969	CODE:	1302	PPCODE:
970	{	1303	{
971	dREQ;	1304	dREQ;
972		1305
973	New (0, req->statdata, 1, Stat_t);	1306	New (0, req->statdata, 1, Stat_t);
974	if (!req->statdata)	1307	if (!req->statdata)
975	{	1308	{
976	free_req (req);	1309	req_free (req);
977	croak ("out of memory during aio_req->statdata allocation");	1310	croak ("out of memory during aio_req->statdata allocation");
978	}	1311	}
979		1312
980	if (SvPOK (fh_or_path))	1313	if (SvPOK (fh_or_path))
981	{	1314	{
…		…
988	req->type = REQ_FSTAT;	1321	req->type = REQ_FSTAT;
989	req->fh = newSVsv (fh_or_path);	1322	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1323	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}	1324	}
992		1325
993	send_req (req);	1326	REQ_SEND;
994	}	1327	}
995		1328
996	void	1329	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1330	aio_unlink (pathname,callback=&PL_sv_undef)
998	SV * pathname	1331	SV * pathname
999	SV * callback	1332	SV * callback
1000	ALIAS:	1333	ALIAS:
1001	aio_unlink = REQ_UNLINK	1334	aio_unlink = REQ_UNLINK
1002	aio_rmdir = REQ_RMDIR	1335	aio_rmdir = REQ_RMDIR
1003	aio_readdir = REQ_READDIR	1336	aio_readdir = REQ_READDIR
1004	CODE:	1337	PPCODE:
1005	{	1338	{
1006	dREQ;	1339	dREQ;
1007		1340
1008	req->type = ix;	1341	req->type = ix;
1009	req->data = newSVsv (pathname);	1342	req->data = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1343	req->dataptr = SvPVbyte_nolen (req->data);
1011		1344
1012	send_req (req);	1345	REQ_SEND;
1013	}	1346	}
1014		1347
1015	void	1348	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1349	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1017	SV * oldpath	1350	SV * oldpath
…		…
1019	SV * callback	1352	SV * callback
1020	ALIAS:	1353	ALIAS:
1021	aio_link = REQ_LINK	1354	aio_link = REQ_LINK
1022	aio_symlink = REQ_SYMLINK	1355	aio_symlink = REQ_SYMLINK
1023	aio_rename = REQ_RENAME	1356	aio_rename = REQ_RENAME
1024	CODE:	1357	PPCODE:
1025	{	1358	{
1026	dREQ;	1359	dREQ;
1027		1360
1028	req->type = ix;	1361	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1362	req->fh = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1363	req->data2ptr = SvPVbyte_nolen (req->fh);
1031	req->data = newSVsv (newpath);	1364	req->data = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1365	req->dataptr = SvPVbyte_nolen (req->data);
1033		1366
1034	send_req (req);	1367	REQ_SEND;
1035	}	1368	}
1036		1369
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	1370	void
1041	cancel_most_requests ()	1371	aio_busy (delay,callback=&PL_sv_undef)
		1372	double delay
		1373	SV * callback
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = REQ_BUSY;
		1379	req->fd = delay < 0. ? 0 : delay;
		1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1381
		1382	REQ_SEND;
		1383	}
		1384
		1385	void
		1386	aio_group (callback=&PL_sv_undef)
		1387	SV * callback
1042	PROTOTYPE:	1388	PROTOTYPE: ;$
1043	CODE:	1389	PPCODE:
1044	{	1390	{
1045	aio_req *req;	1391	dREQ;
1046		1392
1047	pthread_mutex_lock (&reqlock);	1393	req->type = REQ_GROUP;
1048	for (req = reqs; req; req = req->next)	1394	req_send (req);
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		1395
1052	pthread_mutex_lock (&reslock);	1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1053	for (req = ress; req; req = req->next)
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}	1397	}
1057		1398
1058	#endif	1399	void
		1400	aio_nop (callback=&PL_sv_undef)
		1401	SV * callback
		1402	PPCODE:
		1403	{
		1404	dREQ;
		1405
		1406	req->type = REQ_NOP;
		1407
		1408	REQ_SEND;
		1409	}
		1410
		1411	int
		1412	aioreq_pri (int pri = 0)
		1413	PROTOTYPE: ;$
		1414	CODE:
		1415	RETVAL = next_pri - PRI_BIAS;
		1416	if (items > 0)
		1417	{
		1418	if (pri < PRI_MIN) pri = PRI_MIN;
		1419	if (pri > PRI_MAX) pri = PRI_MAX;
		1420	next_pri = pri + PRI_BIAS;
		1421	}
		1422	OUTPUT:
		1423	RETVAL
		1424
		1425	void
		1426	aioreq_nice (int nice = 0)
		1427	CODE:
		1428	nice = next_pri - nice;
		1429	if (nice < PRI_MIN) nice = PRI_MIN;
		1430	if (nice > PRI_MAX) nice = PRI_MAX;
		1431	next_pri = nice + PRI_BIAS;
1059		1432
1060	void	1433	void
1061	flush ()	1434	flush ()
1062	PROTOTYPE:	1435	PROTOTYPE:
1063	CODE:	1436	CODE:
1064	while (nreqs)	1437	while (nreqs)
1065	{	1438	{
1066	poll_wait ();	1439	poll_wait ();
1067	poll_cb ();	1440	poll_cb (0);
1068	}	1441	}
1069		1442
1070	void	1443	void
1071	poll()	1444	poll()
1072	PROTOTYPE:	1445	PROTOTYPE:
1073	CODE:	1446	CODE:
1074	if (nreqs)	1447	if (nreqs)
1075	{	1448	{
1076	poll_wait ();	1449	poll_wait ();
1077	poll_cb ();	1450	poll_cb (0);
1078	}	1451	}
1079		1452
1080	int	1453	int
1081	poll_fileno()	1454	poll_fileno()
1082	PROTOTYPE:	1455	PROTOTYPE:
…		…
1087		1460
1088	int	1461	int
1089	poll_cb(...)	1462	poll_cb(...)
1090	PROTOTYPE:	1463	PROTOTYPE:
1091	CODE:	1464	CODE:
1092	RETVAL = poll_cb ();	1465	RETVAL = poll_cb (0);
		1466	OUTPUT:
		1467	RETVAL
		1468
		1469	int
		1470	poll_some(int max = 0)
		1471	PROTOTYPE: $
		1472	CODE:
		1473	RETVAL = poll_cb (max);
1093	OUTPUT:	1474	OUTPUT:
1094	RETVAL	1475	RETVAL
1095		1476
1096	void	1477	void
1097	poll_wait()	1478	poll_wait()
…		…
1106	CODE:	1487	CODE:
1107	RETVAL = nreqs;	1488	RETVAL = nreqs;
1108	OUTPUT:	1489	OUTPUT:
1109	RETVAL	1490	RETVAL
1110		1491
		1492	int
		1493	nready()
		1494	PROTOTYPE:
		1495	CODE:
		1496	if (WORDREAD_UNSAFE) LOCK (reqlock);
		1497	RETVAL = nready;
		1498	if (WORDREAD_UNSAFE) UNLOCK (reqlock);
		1499	OUTPUT:
		1500	RETVAL
		1501
		1502	int
		1503	npending()
		1504	PROTOTYPE:
		1505	CODE:
		1506	if (WORDREAD_UNSAFE) LOCK (reslock);
		1507	RETVAL = npending;
		1508	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		1509	OUTPUT:
		1510	RETVAL
		1511
		1512	PROTOTYPES: DISABLE
		1513
		1514	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1515
		1516	void
		1517	cancel (aio_req_ornot req)
		1518	CODE:
		1519	req_cancel (req);
		1520
		1521	void
		1522	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1523	CODE:
		1524	SvREFCNT_dec (req->callback);
		1525	req->callback = newSVsv (callback);
		1526
		1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1528
		1529	void
		1530	add (aio_req grp, ...)
		1531	PPCODE:
		1532	{
		1533	int i;
		1534	aio_req req;
		1535
		1536	if (grp->fd == 2)
		1537	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1538
		1539	for (i = 1; i < items; ++i )
		1540	{
		1541	if (GIMME_V != G_VOID)
		1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1543
		1544	req = SvAIO_REQ (ST (i));
		1545
		1546	if (req)
		1547	{
		1548	++grp->length;
		1549	req->grp = grp;
		1550
		1551	req->grp_prev = 0;
		1552	req->grp_next = grp->grp_first;
		1553
		1554	if (grp->grp_first)
		1555	grp->grp_first->grp_prev = req;
		1556
		1557	grp->grp_first = req;
		1558	}
		1559	}
		1560	}
		1561
		1562	void
		1563	cancel_subs (aio_req_ornot req)
		1564	CODE:
		1565	req_cancel_subs (req);
		1566
		1567	void
		1568	result (aio_req grp, ...)
		1569	CODE:
		1570	{
		1571	int i;
		1572	AV *av;
		1573
		1574	grp->errorno = errno;
		1575
		1576	av = newAV ();
		1577
		1578	for (i = 1; i < items; ++i )
		1579	av_push (av, newSVsv (ST (i)));
		1580
		1581	SvREFCNT_dec (grp->data);
		1582	grp->data = (SV *)av;
		1583	}
		1584
		1585	void
		1586	errno (aio_req grp, int errorno = errno)
		1587	CODE:
		1588	grp->errorno = errorno;
		1589
		1590	void
		1591	limit (aio_req grp, int limit)
		1592	CODE:
		1593	grp->fd2 = limit;
		1594	aio_grp_feed (grp);
		1595
		1596	void
		1597	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1598	CODE:
		1599	{
		1600	SvREFCNT_dec (grp->fh2);
		1601	grp->fh2 = newSVsv (callback);
		1602
		1603	if (grp->fd2 <= 0)
		1604	grp->fd2 = 2;
		1605
		1606	aio_grp_feed (grp);
		1607	}
		1608

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