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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.33 by root, Mon Aug 22 23:21:57 2005 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
7		15
8	#include "autoconf/config.h"	16	#include "autoconf/config.h"
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
		20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
12	#include <sys/types.h>	24	#include <sys/types.h>
13	#include <sys/stat.h>	25	#include <sys/stat.h>
14		26	#include <limits.h>
15	#include <unistd.h>	27	#include <unistd.h>
16	#include <fcntl.h>	28	#include <fcntl.h>
17	#include <signal.h>	29	#include <signal.h>
18	#include <sched.h>	30	#include <sched.h>
19		31
…		…
23	# elif __freebsd	35	# elif __freebsd
24	# include <sys/socket.h>	36	# include <sys/socket.h>
25	# include <sys/uio.h>	37	# include <sys/uio.h>
26	# elif __hpux	38	# elif __hpux
27	# include <sys/socket.h>	39	# include <sys/socket.h>
		40	# elif __solaris /* not yet */
		41	# include <sys/sendfile.h>
		42	# else
		43	# error sendfile support requested but not available
28	# endif	44	# endif
		45	#endif
		46
		47	/* used for struct dirent, AIX doesn't provide it */
		48	#ifndef NAME_MAX
		49	# define NAME_MAX 4096
29	#endif	50	#endif
30		51
31	#if __ia64	52	#if __ia64
32	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
33	#else	56	#else
34	# define STACKSIZE 4096	57	# define STACKSIZE 16384
35	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf; \
		65	LOCK (wrklock); \
		66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		67	UNLOCK (wrklock); \
		68	if (!aio_buf) \
		69	return -1;
36		70
37	enum {	71	enum {
38	REQ_QUIT,	72	REQ_QUIT,
39	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,	75	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
45	REQ_SYMLINK,	79	REQ_READDIR,
		80	REQ_LINK, REQ_SYMLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
46	};	83	};
47		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
48	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
49	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
50		91
51	int type;	92	SV *data, *callback;
52		93	SV *fh, *fh2;
53	int fd, fd2;	94	void *dataptr, *data2ptr;
		95	Stat_t *statdata;
54	off_t offset;	96	off_t offset;
55	size_t length;	97	size_t length;
56	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
57	mode_t mode; /* open */	104	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63		105
64	Stat_t *statdata;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV *self; /* the perl counterpart of this request, if any */
		110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
65	} aio_cb;	111	} aio_cb;
66		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
67	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
		118	typedef aio_cb *aio_req_ornot;
		119
		120	enum {
		121	PRI_MIN = -4,
		122	PRI_MAX = 4,
		123
		124	DEFAULT_PRI = 0,
		125	PRI_BIAS = -PRI_MIN,
		126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		127	};
		128
		129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
68		130
69	static int started, wanted;	131	static int started, wanted;
70	static volatile int nreqs;	132	static volatile int nreqs;
71	static int max_outstanding = 1<<30;	133	static int max_outstanding = 1<<30;
72	static int respipe [2];	134	static int respipe [2];
73		135
		136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		138	#else
		139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		140	#endif
		141
		142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		144
		145	/* worker threasd management */
		146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		147
		148	typedef struct worker {
		149	/* locked by wrklock */
		150	struct worker *prev, *next;
		151
		152	pthread_t tid;
		153
		154	/* locked by reslock, reqlock or wrklock */
		155	aio_req req; /* currently processed request */
		156	void *dbuf;
		157	DIR *dirp;
		158	} worker;
		159
		160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		161
		162	static void worker_clear (worker *wrk)
		163	{
		164	if (wrk->dirp)
		165	{
		166	closedir (wrk->dirp);
		167	wrk->dirp = 0;
		168	}
		169
		170	if (wrk->dbuf)
		171	{
		172	free (wrk->dbuf);
		173	wrk->dbuf = 0;
		174	}
		175	}
		176
		177	static void worker_free (worker *wrk)
		178	{
		179	wrk->next->prev = wrk->prev;
		180	wrk->prev->next = wrk->next;
		181
		182	free (wrk);
		183	}
		184
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		188
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	189	/*
79	static volatile aio_req ress, rese; /* queue start, queue end */	190	* a somewhat faster data structure might be nice, but
		191	* with 8 priorities this actually needs <20 insns
		192	* per shift, the most expensive operation.
		193	*/
		194	typedef struct {
		195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		196	int size;
		197	} reqq;
80		198
		199	static reqq req_queue;
		200	static reqq res_queue;
		201
		202	int reqq_push (reqq *q, aio_req req)
		203	{
		204	int pri = req->pri;
		205	req->next = 0;
		206
		207	if (q->qe[pri])
		208	{
		209	q->qe[pri]->next = req;
		210	q->qe[pri] = req;
		211	}
		212	else
		213	q->qe[pri] = q->qs[pri] = req;
		214
		215	return q->size++;
		216	}
		217
		218	aio_req reqq_shift (reqq *q)
		219	{
		220	int pri;
		221
		222	if (!q->size)
		223	return 0;
		224
		225	--q->size;
		226
		227	for (pri = NUM_PRI; pri--; )
		228	{
		229	aio_req req = q->qs[pri];
		230
		231	if (req)
		232	{
		233	if (!(q->qs[pri] = req->next))
		234	q->qe[pri] = 0;
		235
		236	return req;
		237	}
		238	}
		239
		240	abort ();
		241	}
		242
		243	static void req_invoke (aio_req req);
81	static void free_req (aio_req req)	244	static void req_free (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		245
		246	/* must be called at most once */
		247	static SV *req_sv (aio_req req, const char *klass)
		248	{
86	if (req->fh)	249	if (!req->self)
87	SvREFCNT_dec (req->fh);	250	{
		251	req->self = (SV *)newHV ();
		252	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		253	}
88		254
89	if (req->fh2)	255	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		256	}
		257
		258	static aio_req SvAIO_REQ (SV *sv)
		259	{
		260	MAGIC *mg;
		261
		262	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		263	croak ("object of class " AIO_REQ_KLASS " expected");
		264
		265	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		266
		267	return mg ? (aio_req)mg->mg_ptr : 0;
		268	}
		269
		270	static void aio_grp_feed (aio_req grp)
		271	{
		272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		273	{
		274	int old_len = grp->length;
		275
		276	if (grp->fh2 && SvOK (grp->fh2))
		277	{
		278	dSP;
		279
		280	ENTER;
		281	SAVETMPS;
		282	PUSHMARK (SP);
		283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		284	PUTBACK;
		285	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		286	SPAGAIN;
		287	FREETMPS;
		288	LEAVE;
		289	}
		290
		291	/* stop if no progress has been made */
		292	if (old_len == grp->length)
		293	{
90	SvREFCNT_dec (req->fh2);	294	SvREFCNT_dec (grp->fh2);
91		295	grp->fh2 = 0;
92	if (req->statdata)	296	break;
93	Safefree (req->statdata);	297	}
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);
97
98	Safefree (req);
99	}
100
101	static void
102	poll_wait ()
103	{
104	if (nreqs && !ress)
105	{	298	}
		299	}
		300
		301	static void aio_grp_dec (aio_req grp)
		302	{
		303	--grp->length;
		304
		305	/* call feeder, if applicable */
		306	aio_grp_feed (grp);
		307
		308	/* finish, if done */
		309	if (!grp->length && grp->fd)
		310	{
		311	req_invoke (grp);
		312	req_free (grp);
		313	}
		314	}
		315
		316	static void poll_wait ()
		317	{
106	fd_set rfd;	318	fd_set rfd;
		319
		320	while (nreqs)
		321	{
		322	int size;
		323	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		324	LOCK (reslock);
		325	#endif
		326	size = res_queue.size;
		327	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		328	UNLOCK (reslock);
		329	#endif
		330
		331	if (size)
		332	return;
		333
107	FD_ZERO(&rfd);	334	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);	335	FD_SET(respipe [0], &rfd);
109		336
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	337	select (respipe [0] + 1, &rfd, 0, 0, 0);
111	}	338	}
112	}	339	}
113		340
114	static int	341	static void req_invoke (aio_req req)
115	poll_cb ()	342	{
		343	dSP;
		344
		345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		346	{
		347	errno = req->errorno;
		348
		349	ENTER;
		350	SAVETMPS;
		351	PUSHMARK (SP);
		352	EXTEND (SP, 1);
		353
		354	switch (req->type)
		355	{
		356	case REQ_READDIR:
		357	{
		358	SV *rv = &PL_sv_undef;
		359
		360	if (req->result >= 0)
		361	{
		362	int i;
		363	char *buf = req->data2ptr;
		364	AV *av = newAV ();
		365
		366	av_extend (av, req->result - 1);
		367
		368	for (i = 0; i < req->result; ++i)
		369	{
		370	SV *sv = newSVpv (buf, 0);
		371
		372	av_store (av, i, sv);
		373	buf += SvCUR (sv) + 1;
		374	}
		375
		376	rv = sv_2mortal (newRV_noinc ((SV *)av));
		377	}
		378
		379	PUSHs (rv);
		380	}
		381	break;
		382
		383	case REQ_OPEN:
		384	{
		385	/* convert fd to fh */
		386	SV *fh;
		387
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	PUTBACK;
		390	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		391	SPAGAIN;
		392
		393	fh = SvREFCNT_inc (POPs);
		394
		395	PUSHMARK (SP);
		396	XPUSHs (sv_2mortal (fh));
		397	}
		398	break;
		399
		400	case REQ_GROUP:
		401	req->fd = 2; /* mark group as finished */
		402
		403	if (req->data)
		404	{
		405	int i;
		406	AV *av = (AV *)req->data;
		407
		408	EXTEND (SP, AvFILL (av) + 1);
		409	for (i = 0; i <= AvFILL (av); ++i)
		410	PUSHs (*av_fetch (av, i, 0));
		411	}
		412	break;
		413
		414	case REQ_NOP:
		415	case REQ_BUSY:
		416	break;
		417
		418	default:
		419	PUSHs (sv_2mortal (newSViv (req->result)));
		420	break;
		421	}
		422
		423
		424	PUTBACK;
		425	call_sv (req->callback, G_VOID | G_EVAL);
		426	SPAGAIN;
		427
		428	FREETMPS;
		429	LEAVE;
		430	}
		431
		432	if (req->grp)
		433	{
		434	aio_req grp = req->grp;
		435
		436	/* unlink request */
		437	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		438	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		439
		440	if (grp->grp_first == req)
		441	grp->grp_first = req->grp_next;
		442
		443	aio_grp_dec (grp);
		444	}
		445
		446	if (SvTRUE (ERRSV))
		447	{
		448	req_free (req);
		449	croak (0);
		450	}
		451	}
		452
		453	static void req_free (aio_req req)
		454	{
		455	if (req->self)
		456	{
		457	sv_unmagic (req->self, PERL_MAGIC_ext);
		458	SvREFCNT_dec (req->self);
		459	}
		460
		461	SvREFCNT_dec (req->data);
		462	SvREFCNT_dec (req->fh);
		463	SvREFCNT_dec (req->fh2);
		464	SvREFCNT_dec (req->callback);
		465	Safefree (req->statdata);
		466
		467	if (req->type == REQ_READDIR)
		468	free (req->data2ptr);
		469
		470	Safefree (req);
		471	}
		472
		473	static void req_cancel (aio_req req)
		474	{
		475	req->flags |= FLAG_CANCELLED;
		476
		477	if (req->type == REQ_GROUP)
		478	{
		479	aio_req sub;
		480
		481	for (sub = req->grp_first; sub; sub = sub->grp_next)
		482	req_cancel (sub);
		483	}
		484	}
		485
		486	static int poll_cb ()
116	{	487	{
117	dSP;	488	dSP;
118	int count = 0;	489	int count = 0;
119	int do_croak = 0;	490	int do_croak = 0;
120	aio_req req;	491	aio_req req;
121		492
122	for (;;)	493	for (;;)
123	{	494	{
124	pthread_mutex_lock (&reslock);	495	LOCK (reslock);
125	req = ress;	496	req = reqq_shift (&res_queue);
126		497
127	if (req)	498	if (req)
128	{	499	{
129	ress = req->next;
130
131	if (!ress)	500	if (!res_queue.size)
132	{	501	{
133	/* read any signals sent by the worker threads */	502	/* read any signals sent by the worker threads */
134	char buf [32];	503	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)	504	while (read (respipe [0], buf, 32) == 32)
136	;	505	;
137
138	rese = 0;
139	}	506	}
140	}	507	}
141		508
142	pthread_mutex_unlock (&reslock);	509	UNLOCK (reslock);
143		510
144	if (!req)	511	if (!req)
145	break;	512	break;
146		513
147	nreqs--;	514	--nreqs;
148		515
149	if (req->type == REQ_QUIT)	516	if (req->type == REQ_QUIT)
150	started--;	517	started--;
		518	else if (req->type == REQ_GROUP && req->length)
		519	{
		520	req->fd = 1; /* mark request as delayed */
		521	continue;
		522	}
151	else	523	else
152	{	524	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)	525	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158		527
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	528	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);	529	SvREADONLY_off (req->data);
…		…
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;	534	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);	535	PL_statcache = *(req->statdata);
167	}	536	}
168		537
169	ENTER;	538	req_invoke (req);
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172		539
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);
198	}
199	}
200
201	LEAVE;
202
203	errno = errorno;
204	count++;	540	count++;
205	}	541	}
206		542
207	free_req (req);	543	req_free (req);
208	}	544	}
209		545
210	return count;	546	return count;
211	}	547	}
212		548
213	static void *aio_proc(void *arg);	549	static void *aio_proc(void *arg);
214		550
215	static void
216	start_thread (void)	551	static void start_thread (void)
217	{	552	{
		553	worker *wrk = calloc (1, sizeof (worker));
		554
		555	if (!wrk)
		556	croak ("unable to allocate worker thread data");
		557
218	sigset_t fullsigset, oldsigset;	558	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;	559	pthread_attr_t attr;
221		560
222	pthread_attr_init (&attr);	561	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);	562	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225		564
226	sigfillset (&fullsigset);	565	sigfillset (&fullsigset);
		566
		567	LOCK (wrklock);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228		569
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		571	{
		572	wrk->prev = &wrk_first;
		573	wrk->next = wrk_first.next;
		574	wrk_first.next->prev = wrk;
		575	wrk_first.next = wrk;
230	started++;	576	started++;
		577	}
		578	else
		579	free (wrk);
231		580
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);	581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		582	UNLOCK (wrklock);
233	}	583	}
234		584
235	static void	585	static void req_send (aio_req req)
236	send_req (aio_req req)
237	{	586	{
238	while (started < wanted && nreqs >= started)	587	while (started < wanted && nreqs >= started)
239	start_thread ();	588	start_thread ();
240		589
241	nreqs++;	590	++nreqs;
242		591
243	pthread_mutex_lock (&reqlock);	592	LOCK (reqlock);
244		593	reqq_push (&req_queue, req);
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);	594	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);	595	UNLOCK (reqlock);
257		596
258	if (nreqs > max_outstanding)	597	if (nreqs > max_outstanding)
259	for (;;)	598	for (;;)
260	{	599	{
261	poll_cb ();	600	poll_cb ();
…		…
265		604
266	poll_wait ();	605	poll_wait ();
267	}	606	}
268	}	607	}
269		608
270	static void	609	static void end_thread (void)
271	end_thread (void)
272	{	610	{
273	aio_req req;	611	aio_req req;
		612
274	Newz (0, req, 1, aio_cb);	613	Newz (0, req, 1, aio_cb);
		614
275	req->type = REQ_QUIT;	615	req->type = REQ_QUIT;
		616	req->pri = PRI_MAX + PRI_BIAS;
276		617
277	send_req (req);	618	req_send (req);
278	}	619	}
279		620
280	static void min_parallel (int nthreads)	621	static void min_parallel (int nthreads)
281	{	622	{
282	if (wanted < nthreads)	623	if (wanted < nthreads)
…		…
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	652	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");	653	croak ("cannot set result pipe to nonblocking mode");
313		654
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	655	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");	656	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}
329
330	static void atfork_child (void)
331	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();
357
358	atfork_parent ();
359	}	657	}
360		658
361	/*****************************************************************************/	659	/*****************************************************************************/
362	/* work around various missing functions */	660	/* work around various missing functions */
363		661
…		…
368	/*	666	/*
369	* make our pread/pwrite safe against themselves, but not against	667	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,	668	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	669	* but that's your problem, not mine.
372	*/	670	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		672
375	static ssize_t	673	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	{	674	{
378	ssize_t res;	675	ssize_t res;
379	off_t ooffset;	676	off_t ooffset;
380		677
381	pthread_mutex_lock (&iolock);	678	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	679	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	680	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	681	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	682	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);	683	UNLOCK (preadwritelock);
387		684
388	return res;	685	return res;
389	}	686	}
390		687
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	689	{
394	ssize_t res;	690	ssize_t res;
395	off_t ooffset;	691	off_t ooffset;
396		692
397	pthread_mutex_lock (&iolock);	693	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	696	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	697	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);	698	UNLOCK (preadwritelock);
403		699
404	return res;	700	return res;
405	}	701	}
406	#endif	702	#endif
407		703
…		…
410	#endif	706	#endif
411		707
412	#if !HAVE_READAHEAD	708	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	709	# define readahead aio_readahead
414		710
415	static char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)	711	static ssize_t readahead (int fd, off_t offset, size_t count)
419	{	712	{
		713	dBUF;
		714
420	while (count > 0)	715	while (count > 0)
421	{	716	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		718
424	pread (fd, readahead_buf, len, offset);	719	pread (fd, aio_buf, len, offset);
425	offset += len;	720	offset += len;
426	count -= len;	721	count -= len;
427	}	722	}
428		723
429	errno = 0;	724	errno = 0;
430	}	725	}
431	#endif	726	#endif
432		727
		728	#if !HAVE_READDIR_R
		729	# define readdir_r aio_readdir_r
		730
		731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		732
		733	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		734	{
		735	struct dirent *e;
		736	int errorno;
		737
		738	LOCK (readdirlock);
		739
		740	e = readdir (dirp);
		741	errorno = errno;
		742
		743	if (e)
		744	{
		745	*res = ent;
		746	strcpy (ent->d_name, e->d_name);
		747	}
		748	else
		749	*res = 0;
		750
		751	UNLOCK (readdirlock);
		752
		753	errno = errorno;
		754	return e ? 0 : -1;
		755	}
		756	#endif
		757
433	/* sendfile always needs emulation */	758	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
436	{	760	{
437	ssize_t res;	761	ssize_t res;
438		762
439	if (!count)	763	if (!count)
440	return 0;	764	return 0;
441		765
		766	#if HAVE_SENDFILE
442	#if __linux	767	# if __linux
443	res = sendfile (ofd, ifd, &offset, count);	768	res = sendfile (ofd, ifd, &offset, count);
444		769
445	#elif __freebsd	770	# elif __freebsd
446	/*	771	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts	772	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.	773	* wasted on making it similar to other I/O functions.
449	*/	774	*/
450	{	775	{
451	off_t sbytes;	776	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	777	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453		778
454	if (!res && errno == EAGAIN)	779	if (res < 0 && sbytes)
455	/* maybe on others, too, as usual, the manpage leaves you guessing */	780	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
456	res = sbytes;	781	res = sbytes;
457	}	782	}
458		783
459	#elif __hpux	784	# elif __hpux
460	res = sendfile (ofd, ifd, offset, count, 0, 0);	785	res = sendfile (ofd, ifd, offset, count, 0, 0);
461		786
		787	# elif __solaris
		788	{
		789	struct sendfilevec vec;
		790	size_t sbytes;
		791
		792	vec.sfv_fd = ifd;
		793	vec.sfv_flag = 0;
		794	vec.sfv_off = offset;
		795	vec.sfv_len = count;
		796
		797	res = sendfilev (ofd, &vec, 1, &sbytes);
		798
		799	if (res < 0 && sbytes)
		800	res = sbytes;
		801	}
		802
		803	# endif
462	#else	804	#else
463	res = -1;	805	res = -1;
464	errno = ENOSYS;	806	errno = ENOSYS;
465	#endif	807	#endif
466		808
		809	if (res < 0
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	810	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		811	#if __solaris
		812	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		813	#endif
		814	)
		815	)
468	{	816	{
469	/* emulate sendfile. this is a major pain in the ass */	817	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);	818	dBUF;
		819
471	res = 0;	820	res = 0;
472		821
473	for (;;)	822	while (count)
474	{	823	{
475	ssize_t cnt;	824	ssize_t cnt;
476		825
477	cnt = pread (ifd, buf, 4096, offset);	826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
478		827
479	if (cnt <= 0)	828	if (cnt <= 0)
480	{	829	{
481	if (cnt && !res) res = -1;	830	if (cnt && !res) res = -1;
482	break;	831	break;
483	}	832	}
484		833
485	cnt = write (ofd, buf, cnt);	834	cnt = write (ofd, aio_buf, cnt);
486		835
487	if (cnt <= 0)	836	if (cnt <= 0)
488	{	837	{
489	if (cnt && !res) res = -1;	838	if (cnt && !res) res = -1;
490	break;	839	break;
491	}	840	}
492		841
493	offset += cnt;	842	offset += cnt;
494	res += cnt;	843	res += cnt;
		844	count -= cnt;
495	}	845	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}	846	}
503		847
504	return res;	848	return res;
		849	}
		850
		851	/* read a full directory */
		852	static void scandir_ (aio_req req, worker *self)
		853	{
		854	DIR *dirp;
		855	union
		856	{
		857	struct dirent d;
		858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		859	} *u;
		860	struct dirent *entp;
		861	char *name, *names;
		862	int memlen = 4096;
		863	int memofs = 0;
		864	int res = 0;
		865	int errorno;
		866
		867	LOCK (wrklock);
		868	self->dirp = dirp = opendir (req->dataptr);
		869	self->dbuf = u = malloc (sizeof (*u));
		870	UNLOCK (wrklock);
		871
		872	req->data2ptr = names = malloc (memlen);
		873
		874	if (dirp && u && names)
		875	for (;;)
		876	{
		877	errno = 0;
		878	readdir_r (dirp, &u->d, &entp);
		879
		880	if (!entp)
		881	break;
		882
		883	name = entp->d_name;
		884
		885	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		886	{
		887	int len = strlen (name) + 1;
		888
		889	res++;
		890
		891	while (memofs + len > memlen)
		892	{
		893	memlen *= 2;
		894	LOCK (wrklock);
		895	req->data2ptr = names = realloc (names, memlen);
		896	UNLOCK (wrklock);
		897
		898	if (!names)
		899	break;
		900	}
		901
		902	memcpy (names + memofs, name, len);
		903	memofs += len;
		904	}
		905	}
		906
		907	if (errno)
		908	res = -1;
		909
		910	req->result = res;
505	}	911	}
506		912
507	/*****************************************************************************/	913	/*****************************************************************************/
508		914
509	static void *
510	aio_proc (void *thr_arg)	915	static void *aio_proc (void *thr_arg)
511	{	916	{
512	aio_req req;	917	aio_req req;
513	int type;	918	int type;
		919	worker *self = (worker *)thr_arg;
514		920
515	do	921	do
516	{	922	{
517	pthread_mutex_lock (&reqlock);	923	LOCK (reqlock);
518		924
519	for (;;)	925	for (;;)
520	{	926	{
521	req = reqs;	927	self->req = req = reqq_shift (&req_queue);
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528		928
529	if (req)	929	if (req)
530	break;	930	break;
531		931
532	pthread_cond_wait (&reqwait, &reqlock);	932	pthread_cond_wait (&reqwait, &reqlock);
533	}	933	}
534		934
535	pthread_mutex_unlock (&reqlock);	935	UNLOCK (reqlock);
536		936
537	errno = 0; /* strictly unnecessary */	937	errno = 0; /* strictly unnecessary */
		938	type = req->type; /* remember type for QUIT check */
538		939
539	type = req->type;	940	if (!(req->flags & FLAG_CANCELLED))
540
541	switch (type)	941	switch (type)
542	{	942	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
544	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545		945
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
547	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
548		948
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552		952
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	953	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;	954	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	955	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	956	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		957	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558		960
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;	962	case REQ_FSYNC: req->result = fsync (req->fd); break;
		963	case REQ_READDIR: scandir_ (req, self); break;
561		964
		965	case REQ_BUSY:
		966	{
		967	struct timeval tv;
		968
		969	tv.tv_sec = req->fd;
		970	tv.tv_usec = req->fd2;
		971
		972	req->result = select (0, 0, 0, 0, &tv);
		973	}
		974
		975	case REQ_GROUP:
		976	case REQ_NOP:
562	case REQ_QUIT:	977	case REQ_QUIT:
563	break;	978	break;
564		979
565	default:	980	default:
566	req->result = ENOSYS;	981	req->result = ENOSYS;
567	break;	982	break;
568	}	983	}
569		984
570	req->errorno = errno;	985	req->errorno = errno;
571		986
572	pthread_mutex_lock (&reslock);	987	LOCK (reslock);
573		988
574	req->next = 0;	989	if (!reqq_push (&res_queue, req))
575
576	if (rese)
577	{
578	rese->next = req;
579	rese = req;
580	}
581	else
582	{
583	rese = ress = req;
584
585	/* write a dummy byte to the pipe so fh becomes ready */	990	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);	991	write (respipe [1], &respipe, 1);
587	}
588		992
589	pthread_mutex_unlock (&reslock);	993	self->req = 0;
		994	worker_clear (self);
		995
		996	UNLOCK (reslock);
590	}	997	}
591	while (type != REQ_QUIT);	998	while (type != REQ_QUIT);
592		999
		1000	LOCK (wrklock);
		1001	worker_free (self);
		1002	UNLOCK (wrklock);
		1003
593	return 0;	1004	return 0;
		1005	}
		1006
		1007	/*****************************************************************************/
		1008
		1009	static void atfork_prepare (void)
		1010	{
		1011	LOCK (wrklock);
		1012	LOCK (reqlock);
		1013	LOCK (reslock);
		1014	#if !HAVE_PREADWRITE
		1015	LOCK (preadwritelock);
		1016	#endif
		1017	#if !HAVE_READDIR_R
		1018	LOCK (readdirlock);
		1019	#endif
		1020	}
		1021
		1022	static void atfork_parent (void)
		1023	{
		1024	#if !HAVE_READDIR_R
		1025	UNLOCK (readdirlock);
		1026	#endif
		1027	#if !HAVE_PREADWRITE
		1028	UNLOCK (preadwritelock);
		1029	#endif
		1030	UNLOCK (reslock);
		1031	UNLOCK (reqlock);
		1032	UNLOCK (wrklock);
		1033	}
		1034
		1035	static void atfork_child (void)
		1036	{
		1037	aio_req prv;
		1038
		1039	while (prv = reqq_shift (&req_queue))
		1040	req_free (prv);
		1041
		1042	while (prv = reqq_shift (&res_queue))
		1043	req_free (prv);
		1044
		1045	while (wrk_first.next != &wrk_first)
		1046	{
		1047	worker *wrk = wrk_first.next;
		1048
		1049	if (wrk->req)
		1050	req_free (wrk->req);
		1051
		1052	worker_clear (wrk);
		1053	worker_free (wrk);
		1054	}
		1055
		1056	started = 0;
		1057	nreqs = 0;
		1058
		1059	close (respipe [0]);
		1060	close (respipe [1]);
		1061	create_pipe ();
		1062
		1063	atfork_parent ();
594	}	1064	}
595		1065
596	#define dREQ \	1066	#define dREQ \
597	aio_req req; \	1067	aio_req req; \
		1068	int req_pri = next_pri; \
		1069	next_pri = DEFAULT_PRI + PRI_BIAS; \
598	\	1070	\
599	if (SvOK (callback) && !SvROK (callback)) \	1071	if (SvOK (callback) && !SvROK (callback)) \
600	croak ("clalback must be undef or of reference type"); \	1072	croak ("callback must be undef or of reference type"); \
601	\	1073	\
602	Newz (0, req, 1, aio_cb); \	1074	Newz (0, req, 1, aio_cb); \
603	if (!req) \	1075	if (!req) \
604	croak ("out of memory during aio_req allocation"); \	1076	croak ("out of memory during aio_req allocation"); \
605	\	1077	\
606	req->callback = newSVsv (callback);	1078	req->callback = newSVsv (callback); \
		1079	req->pri = req_pri
		1080
		1081	#define REQ_SEND \
		1082	req_send (req); \
		1083	\
		1084	if (GIMME_V != G_VOID) \
		1085	XPUSHs (req_sv (req, AIO_REQ_KLASS));
607		1086
608	MODULE = IO::AIO PACKAGE = IO::AIO	1087	MODULE = IO::AIO PACKAGE = IO::AIO
609		1088
610	PROTOTYPES: ENABLE	1089	PROTOTYPES: ENABLE
611		1090
612	BOOT:	1091	BOOT:
613	{	1092	{
		1093	HV *stash = gv_stashpv ("IO::AIO", 1);
		1094	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1095	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1096	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1097
614	create_pipe ();	1098	create_pipe ();
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1099	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}	1100	}
617		1101
618	void	1102	void
619	min_parallel(nthreads)	1103	min_parallel (nthreads)
620	int nthreads	1104	int nthreads
621	PROTOTYPE: $	1105	PROTOTYPE: $
622		1106
623	void	1107	void
624	max_parallel(nthreads)	1108	max_parallel (nthreads)
625	int nthreads	1109	int nthreads
626	PROTOTYPE: $	1110	PROTOTYPE: $
627		1111
628	int	1112	int
629	max_outstanding(nreqs)	1113	max_outstanding (nreqs)
630	int nreqs	1114	int nreqs
631	PROTOTYPE: $	1115	PROTOTYPE: $
632	CODE:	1116	CODE:
633	RETVAL = max_outstanding;	1117	RETVAL = max_outstanding;
634	max_outstanding = nreqs;	1118	max_outstanding = nreqs;
635		1119
636	void	1120	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1121	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
638	SV * pathname	1122	SV * pathname
639	int flags	1123	int flags
640	int mode	1124	int mode
641	SV * callback	1125	SV * callback
642	PROTOTYPE: $$$;$	1126	PROTOTYPE: $$$;$
643	CODE:	1127	PPCODE:
644	{	1128	{
645	dREQ;	1129	dREQ;
646		1130
647	req->type = REQ_OPEN;	1131	req->type = REQ_OPEN;
648	req->data = newSVsv (pathname);	1132	req->data = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	1133	req->dataptr = SvPVbyte_nolen (req->data);
650	req->fd = flags;	1134	req->fd = flags;
651	req->mode = mode;	1135	req->mode = mode;
652		1136
653	send_req (req);	1137	REQ_SEND;
654	}	1138	}
655		1139
656	void	1140	void
657	aio_close(fh,callback=&PL_sv_undef)	1141	aio_close (fh,callback=&PL_sv_undef)
658	SV * fh	1142	SV * fh
659	SV * callback	1143	SV * callback
660	PROTOTYPE: $;$	1144	PROTOTYPE: $;$
661	ALIAS:	1145	ALIAS:
662	aio_close = REQ_CLOSE	1146	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	1147	aio_fsync = REQ_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	1148	aio_fdatasync = REQ_FDATASYNC
665	CODE:	1149	PPCODE:
666	{	1150	{
667	dREQ;	1151	dREQ;
668		1152
669	req->type = ix;	1153	req->type = ix;
670	req->fh = newSVsv (fh);	1154	req->fh = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1155	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
672		1156
673	send_req (req);	1157	REQ_SEND (req);
674	}	1158	}
675		1159
676	void	1160	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1161	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
678	SV * fh	1162	SV * fh
679	UV offset	1163	UV offset
680	UV length	1164	UV length
681	SV * data	1165	SV * data
682	UV dataoffset	1166	UV dataoffset
683	SV * callback	1167	SV * callback
684	ALIAS:	1168	ALIAS:
685	aio_read = REQ_READ	1169	aio_read = REQ_READ
686	aio_write = REQ_WRITE	1170	aio_write = REQ_WRITE
687	PROTOTYPE: $$$$$;$	1171	PROTOTYPE: $$$$$;$
688	CODE:	1172	PPCODE:
689	{	1173	{
690	aio_req req;	1174	aio_req req;
691	STRLEN svlen;	1175	STRLEN svlen;
692	char *svptr = SvPVbyte (data, svlen);	1176	char *svptr = SvPVbyte (data, svlen);
693		1177
…		…
731	{	1215	{
732	SvREADONLY_on (data);	1216	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	1217	req->data2ptr = (void *)data;
734	}	1218	}
735		1219
736	send_req (req);	1220	REQ_SEND;
737	}	1221	}
738	}	1222	}
739		1223
740	void	1224	void
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1225	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
742	SV * out_fh	1226	SV * out_fh
743	SV * in_fh	1227	SV * in_fh
744	UV in_offset	1228	UV in_offset
745	UV length	1229	UV length
746	SV * callback	1230	SV * callback
747	PROTOTYPE: $$$$;$	1231	PROTOTYPE: $$$$;$
748	CODE:	1232	PPCODE:
749	{	1233	{
750	dREQ;	1234	dREQ;
751		1235
752	req->type = REQ_SENDFILE;	1236	req->type = REQ_SENDFILE;
753	req->fh = newSVsv (out_fh);	1237	req->fh = newSVsv (out_fh);
…		…
755	req->fh2 = newSVsv (in_fh);	1239	req->fh2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1240	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
757	req->offset = in_offset;	1241	req->offset = in_offset;
758	req->length = length;	1242	req->length = length;
759		1243
760	send_req (req);	1244	REQ_SEND;
761	}	1245	}
762		1246
763	void	1247	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1248	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
765	SV * fh	1249	SV * fh
766	UV offset	1250	UV offset
767	IV length	1251	IV length
768	SV * callback	1252	SV * callback
769	PROTOTYPE: $$$;$	1253	PROTOTYPE: $$$;$
770	CODE:	1254	PPCODE:
771	{	1255	{
772	dREQ;	1256	dREQ;
773		1257
774	req->type = REQ_READAHEAD;	1258	req->type = REQ_READAHEAD;
775	req->fh = newSVsv (fh);	1259	req->fh = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1260	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
777	req->offset = offset;	1261	req->offset = offset;
778	req->length = length;	1262	req->length = length;
779		1263
780	send_req (req);	1264	REQ_SEND;
781	}	1265	}
782		1266
783	void	1267	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	1268	aio_stat (fh_or_path,callback=&PL_sv_undef)
785	SV * fh_or_path	1269	SV * fh_or_path
786	SV * callback	1270	SV * callback
787	ALIAS:	1271	ALIAS:
788	aio_stat = REQ_STAT	1272	aio_stat = REQ_STAT
789	aio_lstat = REQ_LSTAT	1273	aio_lstat = REQ_LSTAT
790	CODE:	1274	PPCODE:
791	{	1275	{
792	dREQ;	1276	dREQ;
793		1277
794	New (0, req->statdata, 1, Stat_t);	1278	New (0, req->statdata, 1, Stat_t);
795	if (!req->statdata)	1279	if (!req->statdata)
796	{	1280	{
797	free_req (req);	1281	req_free (req);
798	croak ("out of memory during aio_req->statdata allocation");	1282	croak ("out of memory during aio_req->statdata allocation");
799	}	1283	}
800		1284
801	if (SvPOK (fh_or_path))	1285	if (SvPOK (fh_or_path))
802	{	1286	{
…		…
809	req->type = REQ_FSTAT;	1293	req->type = REQ_FSTAT;
810	req->fh = newSVsv (fh_or_path);	1294	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1295	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
812	}	1296	}
813		1297
814	send_req (req);	1298	REQ_SEND;
815	}	1299	}
816		1300
817	void	1301	void
818	aio_unlink(pathname,callback=&PL_sv_undef)	1302	aio_unlink (pathname,callback=&PL_sv_undef)
819	SV * pathname	1303	SV * pathname
820	SV * callback	1304	SV * callback
821	ALIAS:	1305	ALIAS:
822	aio_unlink = REQ_UNLINK	1306	aio_unlink = REQ_UNLINK
823	aio_rmdir = REQ_RMDIR	1307	aio_rmdir = REQ_RMDIR
		1308	aio_readdir = REQ_READDIR
824	CODE:	1309	PPCODE:
825	{	1310	{
826	dREQ;	1311	dREQ;
827		1312
828	req->type = ix;	1313	req->type = ix;
829	req->data = newSVsv (pathname);	1314	req->data = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	1315	req->dataptr = SvPVbyte_nolen (req->data);
831		1316
832	send_req (req);	1317	REQ_SEND;
833	}	1318	}
834		1319
835	void	1320	void
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1321	aio_link (oldpath,newpath,callback=&PL_sv_undef)
837	SV * oldpath	1322	SV * oldpath
838	SV * newpath	1323	SV * newpath
839	SV * callback	1324	SV * callback
		1325	ALIAS:
		1326	aio_link = REQ_LINK
		1327	aio_symlink = REQ_SYMLINK
		1328	aio_rename = REQ_RENAME
840	CODE:	1329	PPCODE:
841	{	1330	{
842	dREQ;	1331	dREQ;
843		1332
844	req->type = REQ_SYMLINK;	1333	req->type = ix;
845	req->fh = newSVsv (oldpath);	1334	req->fh = newSVsv (oldpath);
846	req->data2ptr = SvPVbyte_nolen (req->fh);	1335	req->data2ptr = SvPVbyte_nolen (req->fh);
847	req->data = newSVsv (newpath);	1336	req->data = newSVsv (newpath);
848	req->dataptr = SvPVbyte_nolen (req->data);	1337	req->dataptr = SvPVbyte_nolen (req->data);
849		1338
850	send_req (req);	1339	REQ_SEND;
851	}	1340	}
852		1341
853	void	1342	void
		1343	aio_busy (delay,callback=&PL_sv_undef)
		1344	double delay
		1345	SV * callback
		1346	PPCODE:
		1347	{
		1348	dREQ;
		1349
		1350	req->type = REQ_BUSY;
		1351	req->fd = delay < 0. ? 0 : delay;
		1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1353
		1354	REQ_SEND;
		1355	}
		1356
		1357	void
		1358	aio_group (callback=&PL_sv_undef)
		1359	SV * callback
		1360	PROTOTYPE: ;$
		1361	PPCODE:
		1362	{
		1363	dREQ;
		1364
		1365	req->type = REQ_GROUP;
		1366	req_send (req);
		1367
		1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1369	}
		1370
		1371	void
		1372	aio_nop (callback=&PL_sv_undef)
		1373	SV * callback
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = REQ_NOP;
		1379
		1380	REQ_SEND;
		1381	}
		1382
		1383	void
		1384	aioreq_pri (int pri = DEFAULT_PRI)
		1385	CODE:
		1386	if (pri < PRI_MIN) pri = PRI_MIN;
		1387	if (pri > PRI_MAX) pri = PRI_MAX;
		1388	next_pri = pri + PRI_BIAS;
		1389
		1390	void
		1391	aioreq_nice (int nice = 0)
		1392	CODE:
		1393	nice = next_pri - nice;
		1394	if (nice < PRI_MIN) nice = PRI_MIN;
		1395	if (nice > PRI_MAX) nice = PRI_MAX;
		1396	next_pri = nice + PRI_BIAS;
		1397
		1398	void
854	flush()	1399	flush ()
855	PROTOTYPE:	1400	PROTOTYPE:
856	CODE:	1401	CODE:
857	while (nreqs)	1402	while (nreqs)
858	{	1403	{
859	poll_wait ();	1404	poll_wait ();
…		…
899	CODE:	1444	CODE:
900	RETVAL = nreqs;	1445	RETVAL = nreqs;
901	OUTPUT:	1446	OUTPUT:
902	RETVAL	1447	RETVAL
903		1448
		1449	PROTOTYPES: DISABLE
		1450
		1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1452
		1453	void
		1454	cancel (aio_req_ornot req)
		1455	CODE:
		1456	req_cancel (req);
		1457
		1458	void
		1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1460	CODE:
		1461	SvREFCNT_dec (req->callback);
		1462	req->callback = newSVsv (callback);
		1463
		1464	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1465
		1466	void
		1467	add (aio_req grp, ...)
		1468	PPCODE:
		1469	{
		1470	int i;
		1471	aio_req req;
		1472
		1473	if (grp->fd == 2)
		1474	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1475
		1476	for (i = 1; i < items; ++i )
		1477	{
		1478	if (GIMME_V != G_VOID)
		1479	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1480
		1481	req = SvAIO_REQ (ST (i));
		1482
		1483	if (req)
		1484	{
		1485	++grp->length;
		1486	req->grp = grp;
		1487
		1488	req->grp_prev = 0;
		1489	req->grp_next = grp->grp_first;
		1490
		1491	if (grp->grp_first)
		1492	grp->grp_first->grp_prev = req;
		1493
		1494	grp->grp_first = req;
		1495	}
		1496	}
		1497	}
		1498
		1499	void
		1500	result (aio_req grp, ...)
		1501	CODE:
		1502	{
		1503	int i;
		1504	AV *av = newAV ();
		1505
		1506	for (i = 1; i < items; ++i )
		1507	av_push (av, newSVsv (ST (i)));
		1508
		1509	SvREFCNT_dec (grp->data);
		1510	grp->data = (SV *)av;
		1511	}
		1512
		1513	void
		1514	limit (aio_req grp, int limit)
		1515	CODE:
		1516	grp->fd2 = limit;
		1517	aio_grp_feed (grp);
		1518
		1519	void
		1520	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1521	CODE:
		1522	{
		1523	SvREFCNT_dec (grp->fh2);
		1524	grp->fh2 = newSVsv (callback);
		1525
		1526	if (grp->fd2 <= 0)
		1527	grp->fd2 = 2;
		1528
		1529	aio_grp_feed (grp);
		1530	}
		1531

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