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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.78 by root, Thu Oct 26 14:35:34 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"
7		16
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
		21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
12	#include <sys/types.h>	25	#include <sys/types.h>
13	#include <sys/stat.h>	26	#include <sys/stat.h>
14		27	#include <limits.h>
15	#include <unistd.h>	28	#include <unistd.h>
16	#include <fcntl.h>	29	#include <fcntl.h>
17	#include <signal.h>	30	#include <signal.h>
18	#include <sched.h>	31	#include <sched.h>
19		32
…		…
30	# else	43	# else
31	# error sendfile support requested but not available	44	# error sendfile support requested but not available
32	# endif	45	# endif
33	#endif	46	#endif
34		47
		48	/* used for struct dirent, AIX doesn't provide it */
		49	#ifndef NAME_MAX
		50	# define NAME_MAX 4096
		51	#endif
		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
35	#if __ia64	58	#if __ia64
36	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
37	#else	62	#else
38	# define STACKSIZE 4096	63	# define STACKSIZE 16384
39	#endif	64	#endif
		65
		66	/* buffer size for various temporary buffers */
		67	#define AIO_BUFSIZE 65536
		68
		69	#define dBUF \
		70	char *aio_buf; \
		71	LOCK (wrklock); \
		72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		73	UNLOCK (wrklock); \
		74	if (!aio_buf) \
		75	return -1;
40		76
41	enum {	77	enum {
42	REQ_QUIT,	78	REQ_QUIT,
43	REQ_OPEN, REQ_CLOSE,	79	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,	80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
45	REQ_SENDFILE,	81	REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
47	REQ_FSYNC, REQ_FDATASYNC,	83	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,	84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
49	REQ_SYMLINK,	85	REQ_READDIR,
		86	REQ_LINK, REQ_SYMLINK,
		87	REQ_GROUP, REQ_NOP,
		88	REQ_BUSY,
50	};	89	};
51		90
		91	#define AIO_REQ_KLASS "IO::AIO::REQ"
		92	#define AIO_GRP_KLASS "IO::AIO::GRP"
		93
52	typedef struct aio_cb {	94	typedef struct aio_cb
		95	{
53	struct aio_cb *volatile next;	96	struct aio_cb *volatile next;
54		97
55	int type;	98	SV *data, *callback;
56		99	SV *fh, *fh2;
57	int fd, fd2;	100	void *dataptr, *data2ptr;
		101	Stat_t *statdata;
58	off_t offset;	102	off_t offset;
59	size_t length;	103	size_t length;
60	ssize_t result;	104	ssize_t result;
		105
		106	STRLEN dataoffset;
		107	int type;
		108	int fd, fd2;
		109	int errorno;
61	mode_t mode; /* open */	110	mode_t mode; /* open */
62	int errorno;
63	SV *data, *callback;
64	SV *fh, *fh2;
65	void *dataptr, *data2ptr;
66	STRLEN dataoffset;
67		111
68	Stat_t *statdata;	112	unsigned char flags;
		113	unsigned char pri;
		114
		115	SV *self; /* the perl counterpart of this request, if any */
		116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
69	} aio_cb;	117	} aio_cb;
70		118
		119	enum {
		120	FLAG_CANCELLED = 0x01,
		121	};
		122
71	typedef aio_cb *aio_req;	123	typedef aio_cb *aio_req;
		124	typedef aio_cb *aio_req_ornot;
72		125
		126	enum {
		127	PRI_MIN = -4,
		128	PRI_MAX = 4,
		129
		130	DEFAULT_PRI = 0,
		131	PRI_BIAS = -PRI_MIN,
		132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		133	};
		134
		135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		136
73	static int started, wanted;	137	static unsigned int started, wanted;
74	static volatile int nreqs;	138	static volatile unsigned int nreqs;
75	static int max_outstanding = 1<<30;	139	static volatile unsigned int max_outstanding = 0xffffffff;
76	static int respipe [2];	140	static int respipe [2];
77		141
		142	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		143	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		144	#else
		145	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		146	#endif
		147
		148	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		149	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		150
		151	/* worker threads management */
		152	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		153
		154	typedef struct worker {
		155	/* locked by wrklock */
		156	struct worker *prev, *next;
		157
		158	pthread_t tid;
		159
		160	/* locked by reslock, reqlock or wrklock */
		161	aio_req req; /* currently processed request */
		162	void *dbuf;
		163	DIR *dirp;
		164	} worker;
		165
		166	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		167
		168	static void worker_clear (worker *wrk)
		169	{
		170	if (wrk->dirp)
		171	{
		172	closedir (wrk->dirp);
		173	wrk->dirp = 0;
		174	}
		175
		176	if (wrk->dbuf)
		177	{
		178	free (wrk->dbuf);
		179	wrk->dbuf = 0;
		180	}
		181	}
		182
		183	static void worker_free (worker *wrk)
		184	{
		185	wrk->next->prev = wrk->prev;
		186	wrk->prev->next = wrk->next;
		187
		188	free (wrk);
		189	}
		190
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	191	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	192	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	193	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		194
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	195	/*
83	static volatile aio_req ress, rese; /* queue start, queue end */	196	* a somewhat faster data structure might be nice, but
		197	* with 8 priorities this actually needs <20 insns
		198	* per shift, the most expensive operation.
		199	*/
		200	typedef struct {
		201	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		202	int size;
		203	} reqq;
84		204
		205	static reqq req_queue;
		206	static reqq res_queue;
		207
		208	int reqq_push (reqq *q, aio_req req)
		209	{
		210	int pri = req->pri;
		211	req->next = 0;
		212
		213	if (q->qe[pri])
		214	{
		215	q->qe[pri]->next = req;
		216	q->qe[pri] = req;
		217	}
		218	else
		219	q->qe[pri] = q->qs[pri] = req;
		220
		221	return q->size++;
		222	}
		223
		224	aio_req reqq_shift (reqq *q)
		225	{
		226	int pri;
		227
		228	if (!q->size)
		229	return 0;
		230
		231	--q->size;
		232
		233	for (pri = NUM_PRI; pri--; )
		234	{
		235	aio_req req = q->qs[pri];
		236
		237	if (req)
		238	{
		239	if (!(q->qs[pri] = req->next))
		240	q->qe[pri] = 0;
		241
		242	return req;
		243	}
		244	}
		245
		246	abort ();
		247	}
		248
		249	static int poll_cb (int max);
		250	static void req_invoke (aio_req req);
85	static void free_req (aio_req req)	251	static void req_free (aio_req req);
86	{	252	static void req_cancel (aio_req req);
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		253
		254	/* must be called at most once */
		255	static SV *req_sv (aio_req req, const char *klass)
		256	{
90	if (req->fh)	257	if (!req->self)
91	SvREFCNT_dec (req->fh);	258	{
		259	req->self = (SV *)newHV ();
		260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		261	}
92		262
93	if (req->fh2)	263	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		264	}
		265
		266	static aio_req SvAIO_REQ (SV *sv)
		267	{
		268	MAGIC *mg;
		269
		270	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		271	croak ("object of class " AIO_REQ_KLASS " expected");
		272
		273	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		274
		275	return mg ? (aio_req)mg->mg_ptr : 0;
		276	}
		277
		278	static void aio_grp_feed (aio_req grp)
		279	{
		280	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		281	{
		282	int old_len = grp->length;
		283
		284	if (grp->fh2 && SvOK (grp->fh2))
		285	{
		286	dSP;
		287
		288	ENTER;
		289	SAVETMPS;
		290	PUSHMARK (SP);
		291	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		292	PUTBACK;
		293	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		294	SPAGAIN;
		295	FREETMPS;
		296	LEAVE;
		297	}
		298
		299	/* stop if no progress has been made */
		300	if (old_len == grp->length)
		301	{
94	SvREFCNT_dec (req->fh2);	302	SvREFCNT_dec (grp->fh2);
95		303	grp->fh2 = 0;
96	if (req->statdata)	304	break;
97	Safefree (req->statdata);	305	}
98
99	if (req->callback)
100	SvREFCNT_dec (req->callback);
101
102	Safefree (req);
103	}
104
105	static void
106	poll_wait ()
107	{
108	if (nreqs && !ress)
109	{	306	}
		307	}
		308
		309	static void aio_grp_dec (aio_req grp)
		310	{
		311	--grp->length;
		312
		313	/* call feeder, if applicable */
		314	aio_grp_feed (grp);
		315
		316	/* finish, if done */
		317	if (!grp->length && grp->fd)
		318	{
		319	req_invoke (grp);
		320	req_free (grp);
		321	}
		322	}
		323
		324	static void poll_wait ()
		325	{
110	fd_set rfd;	326	fd_set rfd;
		327
		328	while (nreqs)
		329	{
		330	int size;
		331	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		332	LOCK (reslock);
		333	#endif
		334	size = res_queue.size;
		335	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		336	UNLOCK (reslock);
		337	#endif
		338
		339	if (size)
		340	return;
		341
111	FD_ZERO(&rfd);	342	FD_ZERO(&rfd);
112	FD_SET(respipe [0], &rfd);	343	FD_SET(respipe [0], &rfd);
113		344
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	345	select (respipe [0] + 1, &rfd, 0, 0, 0);
115	}	346	}
116	}	347	}
117		348
118	static int	349	static void req_invoke (aio_req req)
119	poll_cb ()	350	{
		351	dSP;
		352
		353	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		354	{
		355	errno = req->errorno;
		356
		357	ENTER;
		358	SAVETMPS;
		359	PUSHMARK (SP);
		360	EXTEND (SP, 1);
		361
		362	switch (req->type)
		363	{
		364	case REQ_READDIR:
		365	{
		366	SV *rv = &PL_sv_undef;
		367
		368	if (req->result >= 0)
		369	{
		370	int i;
		371	char *buf = req->data2ptr;
		372	AV *av = newAV ();
		373
		374	av_extend (av, req->result - 1);
		375
		376	for (i = 0; i < req->result; ++i)
		377	{
		378	SV *sv = newSVpv (buf, 0);
		379
		380	av_store (av, i, sv);
		381	buf += SvCUR (sv) + 1;
		382	}
		383
		384	rv = sv_2mortal (newRV_noinc ((SV *)av));
		385	}
		386
		387	PUSHs (rv);
		388	}
		389	break;
		390
		391	case REQ_OPEN:
		392	{
		393	/* convert fd to fh */
		394	SV *fh;
		395
		396	PUSHs (sv_2mortal (newSViv (req->result)));
		397	PUTBACK;
		398	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		399	SPAGAIN;
		400
		401	fh = SvREFCNT_inc (POPs);
		402
		403	PUSHMARK (SP);
		404	XPUSHs (sv_2mortal (fh));
		405	}
		406	break;
		407
		408	case REQ_GROUP:
		409	req->fd = 2; /* mark group as finished */
		410
		411	if (req->data)
		412	{
		413	int i;
		414	AV *av = (AV *)req->data;
		415
		416	EXTEND (SP, AvFILL (av) + 1);
		417	for (i = 0; i <= AvFILL (av); ++i)
		418	PUSHs (*av_fetch (av, i, 0));
		419	}
		420	break;
		421
		422	case REQ_NOP:
		423	case REQ_BUSY:
		424	break;
		425
		426	default:
		427	PUSHs (sv_2mortal (newSViv (req->result)));
		428	break;
		429	}
		430
		431
		432	PUTBACK;
		433	call_sv (req->callback, G_VOID | G_EVAL);
		434	SPAGAIN;
		435
		436	FREETMPS;
		437	LEAVE;
		438	}
		439
		440	if (req->grp)
		441	{
		442	aio_req grp = req->grp;
		443
		444	/* unlink request */
		445	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		446	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		447
		448	if (grp->grp_first == req)
		449	grp->grp_first = req->grp_next;
		450
		451	aio_grp_dec (grp);
		452	}
		453
		454	if (SvTRUE (ERRSV))
		455	{
		456	req_free (req);
		457	croak (0);
		458	}
		459	}
		460
		461	static void req_free (aio_req req)
		462	{
		463	if (req->self)
		464	{
		465	sv_unmagic (req->self, PERL_MAGIC_ext);
		466	SvREFCNT_dec (req->self);
		467	}
		468
		469	SvREFCNT_dec (req->data);
		470	SvREFCNT_dec (req->fh);
		471	SvREFCNT_dec (req->fh2);
		472	SvREFCNT_dec (req->callback);
		473	Safefree (req->statdata);
		474
		475	if (req->type == REQ_READDIR)
		476	free (req->data2ptr);
		477
		478	Safefree (req);
		479	}
		480
		481	static void req_cancel_subs (aio_req grp)
		482	{
		483	aio_req sub;
		484
		485	if (grp->type != REQ_GROUP)
		486	return;
		487
		488	SvREFCNT_dec (grp->fh2);
		489	grp->fh2 = 0;
		490
		491	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		492	req_cancel (sub);
		493	}
		494
		495	static void req_cancel (aio_req req)
		496	{
		497	req->flags |= FLAG_CANCELLED;
		498
		499	req_cancel_subs (req);
		500	}
		501
		502	static int poll_cb (int max)
120	{	503	{
121	dSP;	504	dSP;
122	int count = 0;	505	int count = 0;
123	int do_croak = 0;	506	int do_croak = 0;
124	aio_req req;	507	aio_req req;
125		508
126	for (;;)	509	for (;;)
127	{	510	{
128	pthread_mutex_lock (&reslock);	511	while (max <= 0 || count < max)
129	req = ress;
130
131	if (req)
132	{	512	{
133	ress = req->next;	513	LOCK (reslock);
		514	req = reqq_shift (&res_queue);
134		515
135	if (!ress)	516	if (req)
136	{	517	{
137	/* read any signals sent by the worker threads */	518	if (!res_queue.size)
138	char buf [32];
139	while (read (respipe [0], buf, 32) == 32)
140	;
141
142	rese = 0;
143	}
144	}
145
146	pthread_mutex_unlock (&reslock);
147
148	if (!req)
149	break;
150
151	nreqs--;
152
153	if (req->type == REQ_QUIT)
154	started--;
155	else
156	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162
163	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);
165
166	if (req->statdata)
167	{
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);
171	}
172
173	ENTER;
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176
177	if (req->type == REQ_OPEN)
178	{
179	/* convert fd to fh */
180	SV *fh;
181
182	PUTBACK;
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
184	SPAGAIN;
185
186	fh = SvREFCNT_inc (POPs);
187
188	PUSHMARK (SP);
189	XPUSHs (sv_2mortal (fh));
190	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID | G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{	519	{
200	free_req (req);	520	/* read any signals sent by the worker threads */
		521	char buf [32];
		522	while (read (respipe [0], buf, 32) == 32)
201	croak (0);	523	;
202	}	524	}
203	}	525	}
204		526
205	LEAVE;	527	UNLOCK (reslock);
206		528
207	errno = errorno;	529	if (!req)
		530	break;
		531
		532	--nreqs;
		533
		534	if (req->type == REQ_QUIT)
		535	--started;
		536	else if (req->type == REQ_GROUP && req->length)
		537	{
		538	req->fd = 1; /* mark request as delayed */
		539	continue;
		540	}
		541	else
		542	{
		543	if (req->type == REQ_READ)
		544	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		545
		546	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		547	SvREADONLY_off (req->data);
		548
		549	if (req->statdata)
		550	{
		551	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		552	PL_laststatval = req->result;
		553	PL_statcache = *(req->statdata);
		554	}
		555
		556	req_invoke (req);
		557
208	count++;	558	count++;
		559	}
		560
		561	req_free (req);
209	}	562	}
210		563
211	free_req (req);	564	if (nreqs <= max_outstanding)
		565	break;
		566
		567	poll_wait ();
		568
		569	max = 0;
212	}	570	}
213		571
214	return count;	572	return count;
215	}	573	}
216		574
217	static void *aio_proc(void *arg);	575	static void *aio_proc(void *arg);
218		576
219	static void
220	start_thread (void)	577	static void start_thread (void)
221	{	578	{
222	sigset_t fullsigset, oldsigset;	579	sigset_t fullsigset, oldsigset;
223	pthread_t tid;
224	pthread_attr_t attr;	580	pthread_attr_t attr;
		581
		582	worker *wrk = calloc (1, sizeof (worker));
		583
		584	if (!wrk)
		585	croak ("unable to allocate worker thread data");
225		586
226	pthread_attr_init (&attr);	587	pthread_attr_init (&attr);
227	pthread_attr_setstacksize (&attr, STACKSIZE);	588	pthread_attr_setstacksize (&attr, STACKSIZE);
228	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
229		590
230	sigfillset (&fullsigset);	591	sigfillset (&fullsigset);
		592
		593	LOCK (wrklock);
231	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
232		595
233	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		597	{
		598	wrk->prev = &wrk_first;
		599	wrk->next = wrk_first.next;
		600	wrk_first.next->prev = wrk;
		601	wrk_first.next = wrk;
234	started++;	602	++started;
		603	}
		604	else
		605	free (wrk);
235		606
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);	607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		608	UNLOCK (wrklock);
237	}	609	}
238		610
239	static void	611	static void req_send (aio_req req)
240	send_req (aio_req req)
241	{	612	{
242	while (started < wanted && nreqs >= started)	613	while (started < wanted && nreqs >= started)
243	start_thread ();	614	start_thread ();
244		615
245	nreqs++;	616	++nreqs;
246		617
247	pthread_mutex_lock (&reqlock);	618	LOCK (reqlock);
248		619	reqq_push (&req_queue, req);
249	req->next = 0;
250
251	if (reqe)
252	{
253	reqe->next = req;
254	reqe = req;
255	}
256	else
257	reqe = reqs = req;
258
259	pthread_cond_signal (&reqwait);	620	pthread_cond_signal (&reqwait);
260	pthread_mutex_unlock (&reqlock);	621	UNLOCK (reqlock);
261
262	if (nreqs > max_outstanding)
263	for (;;)
264	{
265	poll_cb ();
266
267	if (nreqs <= max_outstanding)
268	break;
269
270	poll_wait ();
271	}
272	}	622	}
273		623
274	static void	624	static void end_thread (void)
275	end_thread (void)
276	{	625	{
277	aio_req req;	626	aio_req req;
		627
278	Newz (0, req, 1, aio_cb);	628	Newz (0, req, 1, aio_cb);
		629
279	req->type = REQ_QUIT;	630	req->type = REQ_QUIT;
		631	req->pri = PRI_MAX + PRI_BIAS;
280		632
281	send_req (req);	633	req_send (req);
282	}	634	}
283		635
284	static void min_parallel (int nthreads)	636	static void min_parallel (int nthreads)
285	{	637	{
286	if (wanted < nthreads)	638	if (wanted < nthreads)
…		…
301	}	653	}
302		654
303	while (started > wanted)	655	while (started > wanted)
304	{	656	{
305	poll_wait ();	657	poll_wait ();
306	poll_cb ();	658	poll_cb (0);
307	}	659	}
308	}	660	}
309		661
310	static void create_pipe ()	662	static void create_pipe ()
311	{	663	{
…		…
316	croak ("cannot set result pipe to nonblocking mode");	668	croak ("cannot set result pipe to nonblocking mode");
317		669
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	670	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");	671	croak ("cannot set result pipe to nonblocking mode");
320	}	672	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}
333
334	static void atfork_child (void)
335	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();
361
362	atfork_parent ();
363	}
364
365	/* currently noops */
366	#define LOCK_FD(fd) do { } while (0)
367	#define UNLOCK_FD(fd) do { } while (0)
368		673
369	/*****************************************************************************/	674	/*****************************************************************************/
370	/* work around various missing functions */	675	/* work around various missing functions */
371		676
372	#if !HAVE_PREADWRITE	677	#if !HAVE_PREADWRITE
…		…
376	/*	681	/*
377	* make our pread/pwrite safe against themselves, but not against	682	* make our pread/pwrite safe against themselves, but not against
378	* normal read/write by using a mutex. slows down execution a lot,	683	* normal read/write by using a mutex. slows down execution a lot,
379	* but that's your problem, not mine.	684	* but that's your problem, not mine.
380	*/	685	*/
381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	686	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
382		687
383	static ssize_t	688	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
384	pread (int fd, void *buf, size_t count, off_t offset)
385	{	689	{
386	ssize_t res;	690	ssize_t res;
387	off_t ooffset;	691	off_t ooffset;
388		692
389	LOCK_FD (fd);	693	LOCK (preadwritelock);
390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
391	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
392	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
393	res = read (fd, buf, count);	696	res = read (fd, buf, count);
394	lseek (fd, ooffset, SEEK_SET);	697	lseek (fd, ooffset, SEEK_SET);
395	pthread_mutex_unlock (&iolock);	698	UNLOCK (preadwritelock);
396	UNLOCK_FD (d);
397		699
398	return res;	700	return res;
399	}	701	}
400		702
401	static ssize_t
402	pwrite (int fd, void *buf, size_t count, off_t offset)	703	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
403	{	704	{
404	ssize_t res;	705	ssize_t res;
405	off_t ooffset;	706	off_t ooffset;
406		707
407	LOCK_FD (fd);	708	LOCK (preadwritelock);
408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
409	ooffset = lseek (fd, 0, SEEK_CUR);	709	ooffset = lseek (fd, 0, SEEK_CUR);
410	lseek (fd, offset, SEEK_SET);	710	lseek (fd, offset, SEEK_SET);
411	res = write (fd, buf, count);	711	res = write (fd, buf, count);
412	lseek (fd, offset, SEEK_SET);	712	lseek (fd, offset, SEEK_SET);
413	pthread_mutex_unlock (&iolock);	713	UNLOCK (preadwritelock);
414	UNLOCK_FD (d);
415		714
416	return res;	715	return res;
417	}	716	}
418	#endif	717	#endif
419		718
420	#if !HAVE_FDATASYNC	719	#if !HAVE_FDATASYNC
421	# define fdatasync fsync	720	# define fdatasync fsync
422	#endif	721	#endif
423		722
424	#if !HAVE_READAHEAD	723	#if !HAVE_READAHEAD
425	# define readahead aio_readahead	724	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
426		725
427	static char readahead_buf[4096];	726	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
428
429	static ssize_t
430	readahead (int fd, off_t offset, size_t count)
431	{	727	{
		728	dBUF;
		729
432	while (count > 0)	730	while (count > 0)
433	{	731	{
434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	732	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
435		733
436	pread (fd, readahead_buf, len, offset);	734	pread (fd, aio_buf, len, offset);
437	offset += len;	735	offset += len;
438	count -= len;	736	count -= len;
439	}	737	}
440		738
441	errno = 0;	739	errno = 0;
442	}	740	}
		741
		742	#endif
		743
		744	#if !HAVE_READDIR_R
		745	# define readdir_r aio_readdir_r
		746
		747	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		748
		749	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		750	{
		751	struct dirent *e;
		752	int errorno;
		753
		754	LOCK (readdirlock);
		755
		756	e = readdir (dirp);
		757	errorno = errno;
		758
		759	if (e)
		760	{
		761	*res = ent;
		762	strcpy (ent->d_name, e->d_name);
		763	}
		764	else
		765	*res = 0;
		766
		767	UNLOCK (readdirlock);
		768
		769	errno = errorno;
		770	return e ? 0 : -1;
		771	}
443	#endif	772	#endif
444		773
445	/* sendfile always needs emulation */	774	/* sendfile always needs emulation */
446	static ssize_t
447	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	775	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
448	{	776	{
449	ssize_t res;	777	ssize_t res;
450		778
451	if (!count)	779	if (!count)
452	return 0;	780	return 0;
453
454	LOCK_FD (ofd);
455		781
456	#if HAVE_SENDFILE	782	#if HAVE_SENDFILE
457	# if __linux	783	# if __linux
458	res = sendfile (ofd, ifd, &offset, count);	784	res = sendfile (ofd, ifd, &offset, count);
459		785
460	# elif __freebsd	786	# elif __freebsd
461	/*	787	/*
462	* Of course, the freebsd sendfile is a dire hack with no thoughts	788	* Of course, the freebsd sendfile is a dire hack with no thoughts
463	* wasted on making it similar to other I/O functions.	789	* wasted on making it similar to other I/O functions.
464	*/	790	*/
465	{	791	{
466	off_t sbytes;	792	off_t sbytes;
467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	793	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
468		794
469	if (res < 0 && sbytes)	795	if (res < 0 && sbytes)
470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	796	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
471	res = sbytes;	797	res = sbytes;
472	}	798	}
473		799
474	# elif __hpux	800	# elif __hpux
475	res = sendfile (ofd, ifd, offset, count, 0, 0);	801	res = sendfile (ofd, ifd, offset, count, 0, 0);
476		802
477	# elif __solaris	803	# elif __solaris
478	{	804	{
479	struct sendfilevec vec;	805	struct sendfilevec vec;
480	size_t sbytes;	806	size_t sbytes;
481		807
482	vec.sfv_fd = ifd;	808	vec.sfv_fd = ifd;
483	vec.sfv_flag = 0;	809	vec.sfv_flag = 0;
484	vec.sfv_off = offset;	810	vec.sfv_off = offset;
485	vec.sfv_len = count;	811	vec.sfv_len = count;
486		812
487	res = sendfilev (ofd, &vec, 1, &sbytes);	813	res = sendfilev (ofd, &vec, 1, &sbytes);
488		814
489	if (res < 0 && sbytes)	815	if (res < 0 && sbytes)
490	res = sbytes;	816	res = sbytes;
491	}	817	}
492		818
493	# else
494	res = -1;
495	errno = ENOSYS;
496	# endif	819	# endif
		820	#else
		821	res = -1;
		822	errno = ENOSYS;
497	#endif	823	#endif
498		824
499	if (res < 0	825	if (res < 0
500	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	826	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
501	#if __solaris	827	#if __solaris
502	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	828	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
503	#endif	829	#endif
504	)	830	)
505	)	831	)
506	{	832	{
507	/* emulate sendfile. this is a major pain in the ass */	833	/* emulate sendfile. this is a major pain in the ass */
508	char *buf = malloc (4096);	834	dBUF;
		835
509	res = 0;	836	res = 0;
510		837
511	for (;;)	838	while (count)
512	{	839	{
513	ssize_t cnt;	840	ssize_t cnt;
514		841
515	cnt = pread (ifd, buf, 4096, offset);	842	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
516		843
517	if (cnt <= 0)	844	if (cnt <= 0)
518	{	845	{
519	if (cnt && !res) res = -1;	846	if (cnt && !res) res = -1;
520	break;	847	break;
521	}	848	}
522		849
523	cnt = write (ofd, buf, cnt);	850	cnt = write (ofd, aio_buf, cnt);
524		851
525	if (cnt <= 0)	852	if (cnt <= 0)
526	{	853	{
527	if (cnt && !res) res = -1;	854	if (cnt && !res) res = -1;
528	break;	855	break;
529	}	856	}
530		857
531	offset += cnt;	858	offset += cnt;
532	res += cnt;	859	res += cnt;
		860	count -= cnt;
533	}	861	}
534
535	{
536	int errorno = errno;
537	free (buf);
538	errno = errorno;
539	}
540	}	862	}
541		863
542	UNLOCK_FD (ofd);
543
544	return res;	864	return res;
		865	}
		866
		867	/* read a full directory */
		868	static void scandir_ (aio_req req, worker *self)
		869	{
		870	DIR *dirp;
		871	union
		872	{
		873	struct dirent d;
		874	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		875	} *u;
		876	struct dirent *entp;
		877	char *name, *names;
		878	int memlen = 4096;
		879	int memofs = 0;
		880	int res = 0;
		881	int errorno;
		882
		883	LOCK (wrklock);
		884	self->dirp = dirp = opendir (req->dataptr);
		885	self->dbuf = u = malloc (sizeof (*u));
		886	req->data2ptr = names = malloc (memlen);
		887	UNLOCK (wrklock);
		888
		889	if (dirp && u && names)
		890	for (;;)
		891	{
		892	errno = 0;
		893	readdir_r (dirp, &u->d, &entp);
		894
		895	if (!entp)
		896	break;
		897
		898	name = entp->d_name;
		899
		900	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		901	{
		902	int len = strlen (name) + 1;
		903
		904	res++;
		905
		906	while (memofs + len > memlen)
		907	{
		908	memlen *= 2;
		909	LOCK (wrklock);
		910	req->data2ptr = names = realloc (names, memlen);
		911	UNLOCK (wrklock);
		912
		913	if (!names)
		914	break;
		915	}
		916
		917	memcpy (names + memofs, name, len);
		918	memofs += len;
		919	}
		920	}
		921
		922	if (errno)
		923	res = -1;
		924
		925	req->result = res;
545	}	926	}
546		927
547	/*****************************************************************************/	928	/*****************************************************************************/
548		929
549	static void *
550	aio_proc (void *thr_arg)	930	static void *aio_proc (void *thr_arg)
551	{	931	{
552	aio_req req;	932	aio_req req;
553	int type;	933	int type;
		934	worker *self = (worker *)thr_arg;
554		935
555	do	936	do
556	{	937	{
557	pthread_mutex_lock (&reqlock);	938	LOCK (reqlock);
558		939
559	for (;;)	940	for (;;)
560	{	941	{
561	req = reqs;	942	self->req = req = reqq_shift (&req_queue);
562
563	if (reqs)
564	{
565	reqs = reqs->next;
566	if (!reqs) reqe = 0;
567	}
568		943
569	if (req)	944	if (req)
570	break;	945	break;
571		946
572	pthread_cond_wait (&reqwait, &reqlock);	947	pthread_cond_wait (&reqwait, &reqlock);
573	}	948	}
574		949
575	pthread_mutex_unlock (&reqlock);	950	UNLOCK (reqlock);
576		951
577	errno = 0; /* strictly unnecessary */	952	errno = 0; /* strictly unnecessary */
		953	type = req->type; /* remember type for QUIT check */
578		954
579	type = req->type;	955	if (!(req->flags & FLAG_CANCELLED))
580
581	switch (type)	956	switch (type)
582	{	957	{
583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	958	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	959	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
585		960
586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	961	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	962	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
588		963
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	964	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	965	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	966	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
592		967
593	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	968	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
594	case REQ_CLOSE: req->result = close (req->fd); break;	969	case REQ_CLOSE: req->result = close (req->fd); break;
595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	970	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
596	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	971	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		972	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		973	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	974	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
598		975
599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	976	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
600	case REQ_FSYNC: req->result = fsync (req->fd); break;	977	case REQ_FSYNC: req->result = fsync (req->fd); break;
		978	case REQ_READDIR: scandir_ (req, self); break;
601		979
		980	case REQ_BUSY:
		981	{
		982	struct timeval tv;
		983
		984	tv.tv_sec = req->fd;
		985	tv.tv_usec = req->fd2;
		986
		987	req->result = select (0, 0, 0, 0, &tv);
		988	}
		989
		990	case REQ_GROUP:
		991	case REQ_NOP:
602	case REQ_QUIT:	992	case REQ_QUIT:
603	break;	993	break;
604		994
605	default:	995	default:
606	req->result = ENOSYS;	996	req->result = ENOSYS;
607	break;	997	break;
608	}	998	}
609		999
610	req->errorno = errno;	1000	req->errorno = errno;
611		1001
612	pthread_mutex_lock (&reslock);	1002	LOCK (reslock);
613		1003
614	req->next = 0;	1004	if (!reqq_push (&res_queue, req))
615
616	if (rese)
617	{
618	rese->next = req;
619	rese = req;
620	}
621	else
622	{
623	rese = ress = req;
624
625	/* write a dummy byte to the pipe so fh becomes ready */	1005	/* write a dummy byte to the pipe so fh becomes ready */
626	write (respipe [1], &respipe, 1);	1006	write (respipe [1], &respipe, 1);
627	}
628		1007
629	pthread_mutex_unlock (&reslock);	1008	self->req = 0;
		1009	worker_clear (self);
		1010
		1011	UNLOCK (reslock);
630	}	1012	}
631	while (type != REQ_QUIT);	1013	while (type != REQ_QUIT);
632		1014
		1015	LOCK (wrklock);
		1016	worker_free (self);
		1017	UNLOCK (wrklock);
		1018
633	return 0;	1019	return 0;
		1020	}
		1021
		1022	/*****************************************************************************/
		1023
		1024	static void atfork_prepare (void)
		1025	{
		1026	LOCK (wrklock);
		1027	LOCK (reqlock);
		1028	LOCK (reslock);
		1029	#if !HAVE_PREADWRITE
		1030	LOCK (preadwritelock);
		1031	#endif
		1032	#if !HAVE_READDIR_R
		1033	LOCK (readdirlock);
		1034	#endif
		1035	}
		1036
		1037	static void atfork_parent (void)
		1038	{
		1039	#if !HAVE_READDIR_R
		1040	UNLOCK (readdirlock);
		1041	#endif
		1042	#if !HAVE_PREADWRITE
		1043	UNLOCK (preadwritelock);
		1044	#endif
		1045	UNLOCK (reslock);
		1046	UNLOCK (reqlock);
		1047	UNLOCK (wrklock);
		1048	}
		1049
		1050	static void atfork_child (void)
		1051	{
		1052	aio_req prv;
		1053
		1054	while (prv = reqq_shift (&req_queue))
		1055	req_free (prv);
		1056
		1057	while (prv = reqq_shift (&res_queue))
		1058	req_free (prv);
		1059
		1060	while (wrk_first.next != &wrk_first)
		1061	{
		1062	worker *wrk = wrk_first.next;
		1063
		1064	if (wrk->req)
		1065	req_free (wrk->req);
		1066
		1067	worker_clear (wrk);
		1068	worker_free (wrk);
		1069	}
		1070
		1071	started = 0;
		1072	nreqs = 0;
		1073
		1074	close (respipe [0]);
		1075	close (respipe [1]);
		1076	create_pipe ();
		1077
		1078	atfork_parent ();
634	}	1079	}
635		1080
636	#define dREQ \	1081	#define dREQ \
637	aio_req req; \	1082	aio_req req; \
		1083	int req_pri = next_pri; \
		1084	next_pri = DEFAULT_PRI + PRI_BIAS; \
638	\	1085	\
639	if (SvOK (callback) && !SvROK (callback)) \	1086	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	1087	croak ("callback must be undef or of reference type"); \
641	\	1088	\
642	Newz (0, req, 1, aio_cb); \	1089	Newz (0, req, 1, aio_cb); \
643	if (!req) \	1090	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	1091	croak ("out of memory during aio_req allocation"); \
645	\	1092	\
646	req->callback = newSVsv (callback);	1093	req->callback = newSVsv (callback); \
		1094	req->pri = req_pri
		1095
		1096	#define REQ_SEND \
		1097	req_send (req); \
		1098	\
		1099	if (GIMME_V != G_VOID) \
		1100	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		1101
648	MODULE = IO::AIO PACKAGE = IO::AIO	1102	MODULE = IO::AIO PACKAGE = IO::AIO
649		1103
650	PROTOTYPES: ENABLE	1104	PROTOTYPES: ENABLE
651		1105
652	BOOT:	1106	BOOT:
653	{	1107	{
		1108	HV *stash = gv_stashpv ("IO::AIO", 1);
		1109	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1110	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1111	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1112
654	create_pipe ();	1113	create_pipe ();
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1114	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
656	}	1115	}
657		1116
658	void	1117	void
659	min_parallel(nthreads)	1118	min_parallel (int nthreads)
660	int nthreads
661	PROTOTYPE: $	1119	PROTOTYPE: $
662		1120
663	void	1121	void
664	max_parallel(nthreads)	1122	max_parallel (int nthreads)
665	int nthreads
666	PROTOTYPE: $	1123	PROTOTYPE: $
667		1124
668	int	1125	int
669	max_outstanding(nreqs)	1126	max_outstanding (int maxreqs)
670	int nreqs	1127	PROTOTYPE: $
671	PROTOTYPE: $
672	CODE:	1128	CODE:
673	RETVAL = max_outstanding;	1129	RETVAL = max_outstanding;
674	max_outstanding = nreqs;	1130	max_outstanding = maxreqs;
		1131	OUTPUT:
		1132	RETVAL
675		1133
676	void	1134	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1135	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
678	SV * pathname	1136	SV * pathname
679	int flags	1137	int flags
680	int mode	1138	int mode
681	SV * callback	1139	SV * callback
682	PROTOTYPE: $$$;$	1140	PROTOTYPE: $$$;$
683	CODE:	1141	PPCODE:
684	{	1142	{
685	dREQ;	1143	dREQ;
686		1144
687	req->type = REQ_OPEN;	1145	req->type = REQ_OPEN;
688	req->data = newSVsv (pathname);	1146	req->data = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	1147	req->dataptr = SvPVbyte_nolen (req->data);
690	req->fd = flags;	1148	req->fd = flags;
691	req->mode = mode;	1149	req->mode = mode;
692		1150
693	send_req (req);	1151	REQ_SEND;
694	}	1152	}
695		1153
696	void	1154	void
697	aio_close(fh,callback=&PL_sv_undef)	1155	aio_close (fh,callback=&PL_sv_undef)
698	SV * fh	1156	SV * fh
699	SV * callback	1157	SV * callback
700	PROTOTYPE: $;$	1158	PROTOTYPE: $;$
701	ALIAS:	1159	ALIAS:
702	aio_close = REQ_CLOSE	1160	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	1161	aio_fsync = REQ_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	1162	aio_fdatasync = REQ_FDATASYNC
705	CODE:	1163	PPCODE:
706	{	1164	{
707	dREQ;	1165	dREQ;
708		1166
709	req->type = ix;	1167	req->type = ix;
710	req->fh = newSVsv (fh);	1168	req->fh = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1169	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		1170
713	send_req (req);	1171	REQ_SEND (req);
714	}	1172	}
715		1173
716	void	1174	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1175	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
718	SV * fh	1176	SV * fh
719	UV offset	1177	UV offset
720	UV length	1178	UV length
721	SV * data	1179	SV * data
722	UV dataoffset	1180	UV dataoffset
723	SV * callback	1181	SV * callback
724	ALIAS:	1182	ALIAS:
725	aio_read = REQ_READ	1183	aio_read = REQ_READ
726	aio_write = REQ_WRITE	1184	aio_write = REQ_WRITE
727	PROTOTYPE: $$$$$;$	1185	PROTOTYPE: $$$$$;$
728	CODE:	1186	PPCODE:
729	{	1187	{
730	aio_req req;	1188	aio_req req;
731	STRLEN svlen;	1189	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	1190	char *svptr = SvPVbyte (data, svlen);
733		1191
…		…
771	{	1229	{
772	SvREADONLY_on (data);	1230	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	1231	req->data2ptr = (void *)data;
774	}	1232	}
775		1233
776	send_req (req);	1234	REQ_SEND;
777	}	1235	}
778	}	1236	}
779		1237
780	void	1238	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1239	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
782	SV * out_fh	1240	SV * out_fh
783	SV * in_fh	1241	SV * in_fh
784	UV in_offset	1242	UV in_offset
785	UV length	1243	UV length
786	SV * callback	1244	SV * callback
787	PROTOTYPE: $$$$;$	1245	PROTOTYPE: $$$$;$
788	CODE:	1246	PPCODE:
789	{	1247	{
790	dREQ;	1248	dREQ;
791		1249
792	req->type = REQ_SENDFILE;	1250	req->type = REQ_SENDFILE;
793	req->fh = newSVsv (out_fh);	1251	req->fh = newSVsv (out_fh);
…		…
795	req->fh2 = newSVsv (in_fh);	1253	req->fh2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1254	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	1255	req->offset = in_offset;
798	req->length = length;	1256	req->length = length;
799		1257
800	send_req (req);	1258	REQ_SEND;
801	}	1259	}
802		1260
803	void	1261	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1262	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
805	SV * fh	1263	SV * fh
806	UV offset	1264	UV offset
807	IV length	1265	IV length
808	SV * callback	1266	SV * callback
809	PROTOTYPE: $$$;$	1267	PROTOTYPE: $$$;$
810	CODE:	1268	PPCODE:
811	{	1269	{
812	dREQ;	1270	dREQ;
813		1271
814	req->type = REQ_READAHEAD;	1272	req->type = REQ_READAHEAD;
815	req->fh = newSVsv (fh);	1273	req->fh = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1274	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	1275	req->offset = offset;
818	req->length = length;	1276	req->length = length;
819		1277
820	send_req (req);	1278	REQ_SEND;
821	}	1279	}
822		1280
823	void	1281	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	1282	aio_stat (fh_or_path,callback=&PL_sv_undef)
825	SV * fh_or_path	1283	SV * fh_or_path
826	SV * callback	1284	SV * callback
827	ALIAS:	1285	ALIAS:
828	aio_stat = REQ_STAT	1286	aio_stat = REQ_STAT
829	aio_lstat = REQ_LSTAT	1287	aio_lstat = REQ_LSTAT
830	CODE:	1288	PPCODE:
831	{	1289	{
832	dREQ;	1290	dREQ;
833		1291
834	New (0, req->statdata, 1, Stat_t);	1292	New (0, req->statdata, 1, Stat_t);
835	if (!req->statdata)	1293	if (!req->statdata)
836	{	1294	{
837	free_req (req);	1295	req_free (req);
838	croak ("out of memory during aio_req->statdata allocation");	1296	croak ("out of memory during aio_req->statdata allocation");
839	}	1297	}
840		1298
841	if (SvPOK (fh_or_path))	1299	if (SvPOK (fh_or_path))
842	{	1300	{
…		…
849	req->type = REQ_FSTAT;	1307	req->type = REQ_FSTAT;
850	req->fh = newSVsv (fh_or_path);	1308	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1309	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
852	}	1310	}
853		1311
854	send_req (req);	1312	REQ_SEND;
855	}	1313	}
856		1314
857	void	1315	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	1316	aio_unlink (pathname,callback=&PL_sv_undef)
859	SV * pathname	1317	SV * pathname
860	SV * callback	1318	SV * callback
861	ALIAS:	1319	ALIAS:
862	aio_unlink = REQ_UNLINK	1320	aio_unlink = REQ_UNLINK
863	aio_rmdir = REQ_RMDIR	1321	aio_rmdir = REQ_RMDIR
		1322	aio_readdir = REQ_READDIR
864	CODE:	1323	PPCODE:
865	{	1324	{
866	dREQ;	1325	dREQ;
867		1326
868	req->type = ix;	1327	req->type = ix;
869	req->data = newSVsv (pathname);	1328	req->data = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	1329	req->dataptr = SvPVbyte_nolen (req->data);
871		1330
872	send_req (req);	1331	REQ_SEND;
873	}	1332	}
874		1333
875	void	1334	void
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1335	aio_link (oldpath,newpath,callback=&PL_sv_undef)
877	SV * oldpath	1336	SV * oldpath
878	SV * newpath	1337	SV * newpath
879	SV * callback	1338	SV * callback
		1339	ALIAS:
		1340	aio_link = REQ_LINK
		1341	aio_symlink = REQ_SYMLINK
		1342	aio_rename = REQ_RENAME
880	CODE:	1343	PPCODE:
881	{	1344	{
882	dREQ;	1345	dREQ;
883		1346
884	req->type = REQ_SYMLINK;	1347	req->type = ix;
885	req->fh = newSVsv (oldpath);	1348	req->fh = newSVsv (oldpath);
886	req->data2ptr = SvPVbyte_nolen (req->fh);	1349	req->data2ptr = SvPVbyte_nolen (req->fh);
887	req->data = newSVsv (newpath);	1350	req->data = newSVsv (newpath);
888	req->dataptr = SvPVbyte_nolen (req->data);	1351	req->dataptr = SvPVbyte_nolen (req->data);
889		1352
890	send_req (req);	1353	REQ_SEND;
891	}	1354	}
892		1355
893	void	1356	void
		1357	aio_busy (delay,callback=&PL_sv_undef)
		1358	double delay
		1359	SV * callback
		1360	PPCODE:
		1361	{
		1362	dREQ;
		1363
		1364	req->type = REQ_BUSY;
		1365	req->fd = delay < 0. ? 0 : delay;
		1366	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1367
		1368	REQ_SEND;
		1369	}
		1370
		1371	void
		1372	aio_group (callback=&PL_sv_undef)
		1373	SV * callback
		1374	PROTOTYPE: ;$
		1375	PPCODE:
		1376	{
		1377	dREQ;
		1378
		1379	req->type = REQ_GROUP;
		1380	req_send (req);
		1381
		1382	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1383	}
		1384
		1385	void
		1386	aio_nop (callback=&PL_sv_undef)
		1387	SV * callback
		1388	PPCODE:
		1389	{
		1390	dREQ;
		1391
		1392	req->type = REQ_NOP;
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aioreq_pri (int pri = DEFAULT_PRI)
		1399	CODE:
		1400	if (pri < PRI_MIN) pri = PRI_MIN;
		1401	if (pri > PRI_MAX) pri = PRI_MAX;
		1402	next_pri = pri + PRI_BIAS;
		1403
		1404	void
		1405	aioreq_nice (int nice = 0)
		1406	CODE:
		1407	nice = next_pri - nice;
		1408	if (nice < PRI_MIN) nice = PRI_MIN;
		1409	if (nice > PRI_MAX) nice = PRI_MAX;
		1410	next_pri = nice + PRI_BIAS;
		1411
		1412	void
894	flush()	1413	flush ()
895	PROTOTYPE:	1414	PROTOTYPE:
896	CODE:	1415	CODE:
897	while (nreqs)	1416	while (nreqs)
898	{	1417	{
899	poll_wait ();	1418	poll_wait ();
900	poll_cb ();	1419	poll_cb (0);
901	}	1420	}
902		1421
903	void	1422	void
904	poll()	1423	poll()
905	PROTOTYPE:	1424	PROTOTYPE:
906	CODE:	1425	CODE:
907	if (nreqs)	1426	if (nreqs)
908	{	1427	{
909	poll_wait ();	1428	poll_wait ();
910	poll_cb ();	1429	poll_cb (0);
911	}	1430	}
912		1431
913	int	1432	int
914	poll_fileno()	1433	poll_fileno()
915	PROTOTYPE:	1434	PROTOTYPE:
…		…
920		1439
921	int	1440	int
922	poll_cb(...)	1441	poll_cb(...)
923	PROTOTYPE:	1442	PROTOTYPE:
924	CODE:	1443	CODE:
925	RETVAL = poll_cb ();	1444	RETVAL = poll_cb (0);
		1445	OUTPUT:
		1446	RETVAL
		1447
		1448	int
		1449	poll_some(int max = 0)
		1450	PROTOTYPE: $
		1451	CODE:
		1452	RETVAL = poll_cb (max);
926	OUTPUT:	1453	OUTPUT:
927	RETVAL	1454	RETVAL
928		1455
929	void	1456	void
930	poll_wait()	1457	poll_wait()
…		…
939	CODE:	1466	CODE:
940	RETVAL = nreqs;	1467	RETVAL = nreqs;
941	OUTPUT:	1468	OUTPUT:
942	RETVAL	1469	RETVAL
943		1470
		1471	PROTOTYPES: DISABLE
		1472
		1473	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1474
		1475	void
		1476	cancel (aio_req_ornot req)
		1477	CODE:
		1478	req_cancel (req);
		1479
		1480	void
		1481	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1482	CODE:
		1483	SvREFCNT_dec (req->callback);
		1484	req->callback = newSVsv (callback);
		1485
		1486	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1487
		1488	void
		1489	add (aio_req grp, ...)
		1490	PPCODE:
		1491	{
		1492	int i;
		1493	aio_req req;
		1494
		1495	if (grp->fd == 2)
		1496	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1497
		1498	for (i = 1; i < items; ++i )
		1499	{
		1500	if (GIMME_V != G_VOID)
		1501	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1502
		1503	req = SvAIO_REQ (ST (i));
		1504
		1505	if (req)
		1506	{
		1507	++grp->length;
		1508	req->grp = grp;
		1509
		1510	req->grp_prev = 0;
		1511	req->grp_next = grp->grp_first;
		1512
		1513	if (grp->grp_first)
		1514	grp->grp_first->grp_prev = req;
		1515
		1516	grp->grp_first = req;
		1517	}
		1518	}
		1519	}
		1520
		1521	void
		1522	cancel_subs (aio_req_ornot req)
		1523	CODE:
		1524	req_cancel_subs (req);
		1525
		1526	void
		1527	result (aio_req grp, ...)
		1528	CODE:
		1529	{
		1530	int i;
		1531	AV *av = newAV ();
		1532
		1533	for (i = 1; i < items; ++i )
		1534	av_push (av, newSVsv (ST (i)));
		1535
		1536	SvREFCNT_dec (grp->data);
		1537	grp->data = (SV *)av;
		1538	}
		1539
		1540	void
		1541	limit (aio_req grp, int limit)
		1542	CODE:
		1543	grp->fd2 = limit;
		1544	aio_grp_feed (grp);
		1545
		1546	void
		1547	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1548	CODE:
		1549	{
		1550	SvREFCNT_dec (grp->fh2);
		1551	grp->fh2 = newSVsv (callback);
		1552
		1553	if (grp->fd2 <= 0)
		1554	grp->fd2 = 2;
		1555
		1556	aio_grp_feed (grp);
		1557	}
		1558

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