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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 1.76 by root, Thu Oct 26 12:38:04 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
…		…
23	# elif __freebsd	36	# elif __freebsd
24	# include <sys/socket.h>	37	# include <sys/socket.h>
25	# include <sys/uio.h>	38	# include <sys/uio.h>
26	# elif __hpux	39	# elif __hpux
27	# include <sys/socket.h>	40	# include <sys/socket.h>
		41	# elif __solaris /* not yet */
		42	# include <sys/sendfile.h>
		43	# else
		44	# error sendfile support requested but not available
28	# endif	45	# endif
		46	#endif
		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
29	#endif	56	#endif
30		57
31	#if __ia64	58	#if __ia64
32	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
33	#else	62	#else
34	# define STACKSIZE 4096	63	# define STACKSIZE 16384
35	#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;
36		76
37	enum {	77	enum {
38	REQ_QUIT,	78	REQ_QUIT,
39	REQ_OPEN, REQ_CLOSE,	79	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,	80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,	81	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,	83	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,	84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
45	REQ_SYMLINK,	85	REQ_READDIR,
		86	REQ_LINK, REQ_SYMLINK,
		87	REQ_GROUP, REQ_NOP,
		88	REQ_BUSY,
46	};	89	};
47		90
		91	#define AIO_REQ_KLASS "IO::AIO::REQ"
		92	#define AIO_GRP_KLASS "IO::AIO::GRP"
		93
48	typedef struct aio_cb {	94	typedef struct aio_cb
		95	{
49	struct aio_cb *volatile next;	96	struct aio_cb *volatile next;
50		97
51	int type;	98	SV *data, *callback;
52		99	SV *fh, *fh2;
53	int fd, fd2;	100	void *dataptr, *data2ptr;
		101	Stat_t *statdata;
54	off_t offset;	102	off_t offset;
55	size_t length;	103	size_t length;
56	ssize_t result;	104	ssize_t result;
		105
		106	STRLEN dataoffset;
		107	int type;
		108	int fd, fd2;
		109	int errorno;
57	mode_t mode; /* open */	110	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63		111
64	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;
65	} aio_cb;	117	} aio_cb;
66		118
		119	enum {
		120	FLAG_CANCELLED = 0x01,
		121	};
		122
67	typedef aio_cb *aio_req;	123	typedef aio_cb *aio_req;
		124	typedef aio_cb *aio_req_ornot;
		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;
68		136
69	static int started, wanted;	137	static int started, wanted;
70	static volatile int nreqs;	138	static volatile int nreqs;
71	static int max_outstanding = 1<<30;
72	static int respipe [2];	139	static int respipe [2];
73		140
		141	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		142	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		143	#else
		144	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		145	#endif
		146
		147	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		148	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		149
		150	/* worker threads management */
		151	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		152
		153	typedef struct worker {
		154	/* locked by wrklock */
		155	struct worker *prev, *next;
		156
		157	pthread_t tid;
		158
		159	/* locked by reslock, reqlock or wrklock */
		160	aio_req req; /* currently processed request */
		161	void *dbuf;
		162	DIR *dirp;
		163	} worker;
		164
		165	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		166
		167	static void worker_clear (worker *wrk)
		168	{
		169	if (wrk->dirp)
		170	{
		171	closedir (wrk->dirp);
		172	wrk->dirp = 0;
		173	}
		174
		175	if (wrk->dbuf)
		176	{
		177	free (wrk->dbuf);
		178	wrk->dbuf = 0;
		179	}
		180	}
		181
		182	static void worker_free (worker *wrk)
		183	{
		184	wrk->next->prev = wrk->prev;
		185	wrk->prev->next = wrk->next;
		186
		187	free (wrk);
		188	}
		189
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	190	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	191	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	192	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		193
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	194	/*
79	static volatile aio_req ress, rese; /* queue start, queue end */	195	* a somewhat faster data structure might be nice, but
		196	* with 8 priorities this actually needs <20 insns
		197	* per shift, the most expensive operation.
		198	*/
		199	typedef struct {
		200	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		201	int size;
		202	} reqq;
80		203
		204	static reqq req_queue;
		205	static reqq res_queue;
		206
		207	int reqq_push (reqq *q, aio_req req)
		208	{
		209	int pri = req->pri;
		210	req->next = 0;
		211
		212	if (q->qe[pri])
		213	{
		214	q->qe[pri]->next = req;
		215	q->qe[pri] = req;
		216	}
		217	else
		218	q->qe[pri] = q->qs[pri] = req;
		219
		220	return q->size++;
		221	}
		222
		223	aio_req reqq_shift (reqq *q)
		224	{
		225	int pri;
		226
		227	if (!q->size)
		228	return 0;
		229
		230	--q->size;
		231
		232	for (pri = NUM_PRI; pri--; )
		233	{
		234	aio_req req = q->qs[pri];
		235
		236	if (req)
		237	{
		238	if (!(q->qs[pri] = req->next))
		239	q->qe[pri] = 0;
		240
		241	return req;
		242	}
		243	}
		244
		245	abort ();
		246	}
		247
		248	static int poll_cb (int max);
		249	static void req_invoke (aio_req req);
81	static void free_req (aio_req req)	250	static void req_free (aio_req req);
82	{	251	static void req_cancel (aio_req req);
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		252
		253	/* must be called at most once */
		254	static SV *req_sv (aio_req req, const char *klass)
		255	{
86	if (req->fh)	256	if (!req->self)
87	SvREFCNT_dec (req->fh);	257	{
		258	req->self = (SV *)newHV ();
		259	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		260	}
88		261
89	if (req->fh2)	262	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		263	}
		264
		265	static aio_req SvAIO_REQ (SV *sv)
		266	{
		267	MAGIC *mg;
		268
		269	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		270	croak ("object of class " AIO_REQ_KLASS " expected");
		271
		272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		273
		274	return mg ? (aio_req)mg->mg_ptr : 0;
		275	}
		276
		277	static void aio_grp_feed (aio_req grp)
		278	{
		279	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		280	{
		281	int old_len = grp->length;
		282
		283	if (grp->fh2 && SvOK (grp->fh2))
		284	{
		285	dSP;
		286
		287	ENTER;
		288	SAVETMPS;
		289	PUSHMARK (SP);
		290	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		291	PUTBACK;
		292	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		293	SPAGAIN;
		294	FREETMPS;
		295	LEAVE;
		296	}
		297
		298	/* stop if no progress has been made */
		299	if (old_len == grp->length)
		300	{
90	SvREFCNT_dec (req->fh2);	301	SvREFCNT_dec (grp->fh2);
91		302	grp->fh2 = 0;
92	if (req->statdata)	303	break;
93	Safefree (req->statdata);	304	}
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	{	305	}
		306	}
		307
		308	static void aio_grp_dec (aio_req grp)
		309	{
		310	--grp->length;
		311
		312	/* call feeder, if applicable */
		313	aio_grp_feed (grp);
		314
		315	/* finish, if done */
		316	if (!grp->length && grp->fd)
		317	{
		318	req_invoke (grp);
		319	req_free (grp);
		320	}
		321	}
		322
		323	static void poll_wait ()
		324	{
106	fd_set rfd;	325	fd_set rfd;
		326
		327	while (nreqs)
		328	{
		329	int size;
		330	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		331	LOCK (reslock);
		332	#endif
		333	size = res_queue.size;
		334	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		335	UNLOCK (reslock);
		336	#endif
		337
		338	if (size)
		339	return;
		340
107	FD_ZERO(&rfd);	341	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);	342	FD_SET(respipe [0], &rfd);
109		343
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	344	select (respipe [0] + 1, &rfd, 0, 0, 0);
111	}	345	}
112	}	346	}
113		347
114	static int	348	static void req_invoke (aio_req req)
115	poll_cb ()	349	{
		350	dSP;
		351
		352	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		353	{
		354	errno = req->errorno;
		355
		356	ENTER;
		357	SAVETMPS;
		358	PUSHMARK (SP);
		359	EXTEND (SP, 1);
		360
		361	switch (req->type)
		362	{
		363	case REQ_READDIR:
		364	{
		365	SV *rv = &PL_sv_undef;
		366
		367	if (req->result >= 0)
		368	{
		369	int i;
		370	char *buf = req->data2ptr;
		371	AV *av = newAV ();
		372
		373	av_extend (av, req->result - 1);
		374
		375	for (i = 0; i < req->result; ++i)
		376	{
		377	SV *sv = newSVpv (buf, 0);
		378
		379	av_store (av, i, sv);
		380	buf += SvCUR (sv) + 1;
		381	}
		382
		383	rv = sv_2mortal (newRV_noinc ((SV *)av));
		384	}
		385
		386	PUSHs (rv);
		387	}
		388	break;
		389
		390	case REQ_OPEN:
		391	{
		392	/* convert fd to fh */
		393	SV *fh;
		394
		395	PUSHs (sv_2mortal (newSViv (req->result)));
		396	PUTBACK;
		397	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		398	SPAGAIN;
		399
		400	fh = SvREFCNT_inc (POPs);
		401
		402	PUSHMARK (SP);
		403	XPUSHs (sv_2mortal (fh));
		404	}
		405	break;
		406
		407	case REQ_GROUP:
		408	req->fd = 2; /* mark group as finished */
		409
		410	if (req->data)
		411	{
		412	int i;
		413	AV *av = (AV *)req->data;
		414
		415	EXTEND (SP, AvFILL (av) + 1);
		416	for (i = 0; i <= AvFILL (av); ++i)
		417	PUSHs (*av_fetch (av, i, 0));
		418	}
		419	break;
		420
		421	case REQ_NOP:
		422	case REQ_BUSY:
		423	break;
		424
		425	default:
		426	PUSHs (sv_2mortal (newSViv (req->result)));
		427	break;
		428	}
		429
		430
		431	PUTBACK;
		432	call_sv (req->callback, G_VOID | G_EVAL);
		433	SPAGAIN;
		434
		435	FREETMPS;
		436	LEAVE;
		437	}
		438
		439	if (req->grp)
		440	{
		441	aio_req grp = req->grp;
		442
		443	/* unlink request */
		444	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		445	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		446
		447	if (grp->grp_first == req)
		448	grp->grp_first = req->grp_next;
		449
		450	aio_grp_dec (grp);
		451	}
		452
		453	if (SvTRUE (ERRSV))
		454	{
		455	req_free (req);
		456	croak (0);
		457	}
		458	}
		459
		460	static void req_free (aio_req req)
		461	{
		462	if (req->self)
		463	{
		464	sv_unmagic (req->self, PERL_MAGIC_ext);
		465	SvREFCNT_dec (req->self);
		466	}
		467
		468	SvREFCNT_dec (req->data);
		469	SvREFCNT_dec (req->fh);
		470	SvREFCNT_dec (req->fh2);
		471	SvREFCNT_dec (req->callback);
		472	Safefree (req->statdata);
		473
		474	if (req->type == REQ_READDIR)
		475	free (req->data2ptr);
		476
		477	Safefree (req);
		478	}
		479
		480	static void req_cancel_subs (aio_req grp)
		481	{
		482	aio_req sub;
		483
		484	if (grp->type != REQ_GROUP)
		485	return;
		486
		487	SvREFCNT_dec (grp->fh2);
		488	grp->fh2 = 0;
		489
		490	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		491	req_cancel (sub);
		492	}
		493
		494	static void req_cancel (aio_req req)
		495	{
		496	req->flags |= FLAG_CANCELLED;
		497
		498	req_cancel_subs (req);
		499	}
		500
		501	static int poll_cb (int max)
116	{	502	{
117	dSP;	503	dSP;
118	int count = 0;	504	int count = 0;
119	int do_croak = 0;	505	int do_croak = 0;
120	aio_req req;	506	aio_req req;
121		507
122	for (;;)	508	while (max <= 0 || count < max)
123	{	509	{
124	pthread_mutex_lock (&reslock);	510	LOCK (reslock);
125	req = ress;	511	req = reqq_shift (&res_queue);
126		512
127	if (req)	513	if (req)
128	{	514	{
129	ress = req->next;
130
131	if (!ress)	515	if (!res_queue.size)
132	{	516	{
133	/* read any signals sent by the worker threads */	517	/* read any signals sent by the worker threads */
134	char buf [32];	518	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)	519	while (read (respipe [0], buf, 32) == 32)
136	;	520	;
137
138	rese = 0;
139	}	521	}
140	}	522	}
141		523
142	pthread_mutex_unlock (&reslock);	524	UNLOCK (reslock);
143		525
144	if (!req)	526	if (!req)
145	break;	527	break;
146		528
147	nreqs--;	529	--nreqs;
148		530
149	if (req->type == REQ_QUIT)	531	if (req->type == REQ_QUIT)
150	started--;	532	started--;
		533	else if (req->type == REQ_GROUP && req->length)
		534	{
		535	req->fd = 1; /* mark request as delayed */
		536	continue;
		537	}
151	else	538	else
152	{	539	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)	540	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	541	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158		542
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	543	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);	544	SvREADONLY_off (req->data);
…		…
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	548	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;	549	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);	550	PL_statcache = *(req->statdata);
167	}	551	}
168		552
169	ENTER;	553	req_invoke (req);
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172		554
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++;	555	count++;
205	}	556	}
206		557
207	free_req (req);	558	req_free (req);
208	}	559	}
209		560
210	return count;	561	return count;
211	}	562	}
212		563
213	static void *aio_proc(void *arg);	564	static void *aio_proc(void *arg);
214		565
215	static void
216	start_thread (void)	566	static void start_thread (void)
217	{	567	{
218	sigset_t fullsigset, oldsigset;	568	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;	569	pthread_attr_t attr;
		570
		571	worker *wrk = calloc (1, sizeof (worker));
		572
		573	if (!wrk)
		574	croak ("unable to allocate worker thread data");
221		575
222	pthread_attr_init (&attr);	576	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);	577	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	578	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225		579
226	sigfillset (&fullsigset);	580	sigfillset (&fullsigset);
		581
		582	LOCK (wrklock);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	583	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228		584
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	585	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		586	{
		587	wrk->prev = &wrk_first;
		588	wrk->next = wrk_first.next;
		589	wrk_first.next->prev = wrk;
		590	wrk_first.next = wrk;
230	started++;	591	started++;
		592	}
		593	else
		594	free (wrk);
231		595
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);	596	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		597	UNLOCK (wrklock);
233	}	598	}
234		599
235	static void	600	static void req_send (aio_req req)
236	send_req (aio_req req)
237	{	601	{
238	while (started < wanted && nreqs >= started)	602	while (started < wanted && nreqs >= started)
239	start_thread ();	603	start_thread ();
240		604
241	nreqs++;	605	++nreqs;
242		606
243	pthread_mutex_lock (&reqlock);	607	LOCK (reqlock);
244		608	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);	609	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);	610	UNLOCK (reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}	611	}
269		612
270	static void	613	static void end_thread (void)
271	end_thread (void)
272	{	614	{
273	aio_req req;	615	aio_req req;
		616
274	Newz (0, req, 1, aio_cb);	617	Newz (0, req, 1, aio_cb);
		618
275	req->type = REQ_QUIT;	619	req->type = REQ_QUIT;
		620	req->pri = PRI_MAX + PRI_BIAS;
276		621
277	send_req (req);	622	req_send (req);
278	}	623	}
279		624
280	static void min_parallel (int nthreads)	625	static void min_parallel (int nthreads)
281	{	626	{
282	if (wanted < nthreads)	627	if (wanted < nthreads)
…		…
297	}	642	}
298		643
299	while (started > wanted)	644	while (started > wanted)
300	{	645	{
301	poll_wait ();	646	poll_wait ();
302	poll_cb ();	647	poll_cb (0);
303	}	648	}
304	}	649	}
305		650
306	static void create_pipe ()	651	static void create_pipe ()
307	{	652	{
…		…
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	656	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");	657	croak ("cannot set result pipe to nonblocking mode");
313		658
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	659	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");	660	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	}	661	}
360		662
361	/*****************************************************************************/	663	/*****************************************************************************/
362	/* work around various missing functions */	664	/* work around various missing functions */
363		665
…		…
368	/*	670	/*
369	* make our pread/pwrite safe against themselves, but not against	671	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,	672	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	673	* but that's your problem, not mine.
372	*/	674	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	675	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		676
375	static ssize_t	677	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	{	678	{
378	ssize_t res;	679	ssize_t res;
379	off_t ooffset;	680	off_t ooffset;
380		681
381	pthread_mutex_lock (&iolock);	682	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	683	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	684	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	685	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	686	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);	687	UNLOCK (preadwritelock);
387		688
388	return res;	689	return res;
389	}	690	}
390		691
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	692	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	693	{
394	ssize_t res;	694	ssize_t res;
395	off_t ooffset;	695	off_t ooffset;
396		696
397	pthread_mutex_lock (&iolock);	697	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	698	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	699	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	700	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	701	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);	702	UNLOCK (preadwritelock);
403		703
404	return res;	704	return res;
405	}	705	}
406	#endif	706	#endif
407		707
408	#if !HAVE_FDATASYNC	708	#if !HAVE_FDATASYNC
409	# define fdatasync fsync	709	# define fdatasync fsync
410	#endif	710	#endif
411		711
412	#if !HAVE_READAHEAD	712	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	713	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
414		714
415	static char readahead_buf[4096];	715	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{	716	{
		717	dBUF;
		718
420	while (count > 0)	719	while (count > 0)
421	{	720	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	721	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		722
424	pread (fd, readahead_buf, len, offset);	723	pread (fd, aio_buf, len, offset);
425	offset += len;	724	offset += len;
426	count -= len;	725	count -= len;
427	}	726	}
428		727
429	errno = 0;	728	errno = 0;
430	}	729	}
		730
		731	#endif
		732
		733	#if !HAVE_READDIR_R
		734	# define readdir_r aio_readdir_r
		735
		736	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		737
		738	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		739	{
		740	struct dirent *e;
		741	int errorno;
		742
		743	LOCK (readdirlock);
		744
		745	e = readdir (dirp);
		746	errorno = errno;
		747
		748	if (e)
		749	{
		750	*res = ent;
		751	strcpy (ent->d_name, e->d_name);
		752	}
		753	else
		754	*res = 0;
		755
		756	UNLOCK (readdirlock);
		757
		758	errno = errorno;
		759	return e ? 0 : -1;
		760	}
431	#endif	761	#endif
432		762
433	/* sendfile always needs emulation */	763	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	764	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
436	{	765	{
437	ssize_t res;	766	ssize_t res;
438		767
439	if (!count)	768	if (!count)
440	return 0;	769	return 0;
441		770
		771	#if HAVE_SENDFILE
442	#if __linux	772	# if __linux
443	res = sendfile (ofd, ifd, &offset, count);	773	res = sendfile (ofd, ifd, &offset, count);
444		774
445	#elif __freebsd	775	# elif __freebsd
446	/*	776	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts	777	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.	778	* wasted on making it similar to other I/O functions.
449	*/	779	*/
450	{	780	{
451	off_t sbytes;	781	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	782	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453		783
454	if (!res && errno == EAGAIN)	784	if (res < 0 && sbytes)
455	/* maybe on others, too, as usual, the manpage leaves you guessing */	785	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
456	res = sbytes;	786	res = sbytes;
457	}	787	}
458		788
459	#elif __hpux	789	# elif __hpux
460	res = sendfile (ofd, ifd, offset, count, 0, 0);	790	res = sendfile (ofd, ifd, offset, count, 0, 0);
461		791
		792	# elif __solaris
		793	{
		794	struct sendfilevec vec;
		795	size_t sbytes;
		796
		797	vec.sfv_fd = ifd;
		798	vec.sfv_flag = 0;
		799	vec.sfv_off = offset;
		800	vec.sfv_len = count;
		801
		802	res = sendfilev (ofd, &vec, 1, &sbytes);
		803
		804	if (res < 0 && sbytes)
		805	res = sbytes;
		806	}
		807
		808	# endif
462	#else	809	#else
463	res = -1;	810	res = -1;
464	errno = ENOSYS;	811	errno = ENOSYS;
465	#endif	812	#endif
466		813
		814	if (res < 0
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	815	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		816	#if __solaris
		817	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		818	#endif
		819	)
		820	)
468	{	821	{
469	/* emulate sendfile. this is a major pain in the ass */	822	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);	823	dBUF;
		824
471	res = 0;	825	res = 0;
472		826
473	for (;;)	827	while (count)
474	{	828	{
475	ssize_t cnt;	829	ssize_t cnt;
476		830
477	cnt = pread (ifd, buf, 4096, offset);	831	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
478		832
479	if (cnt <= 0)	833	if (cnt <= 0)
480	{	834	{
481	if (cnt && !res) res = -1;	835	if (cnt && !res) res = -1;
482	break;	836	break;
483	}	837	}
484		838
485	cnt = write (ofd, buf, cnt);	839	cnt = write (ofd, aio_buf, cnt);
486		840
487	if (cnt <= 0)	841	if (cnt <= 0)
488	{	842	{
489	if (cnt && !res) res = -1;	843	if (cnt && !res) res = -1;
490	break;	844	break;
491	}	845	}
492		846
493	offset += cnt;	847	offset += cnt;
494	res += cnt;	848	res += cnt;
		849	count -= cnt;
495	}	850	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}	851	}
503		852
504	return res;	853	return res;
		854	}
		855
		856	/* read a full directory */
		857	static void scandir_ (aio_req req, worker *self)
		858	{
		859	DIR *dirp;
		860	union
		861	{
		862	struct dirent d;
		863	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		864	} *u;
		865	struct dirent *entp;
		866	char *name, *names;
		867	int memlen = 4096;
		868	int memofs = 0;
		869	int res = 0;
		870	int errorno;
		871
		872	LOCK (wrklock);
		873	self->dirp = dirp = opendir (req->dataptr);
		874	self->dbuf = u = malloc (sizeof (*u));
		875	req->data2ptr = names = malloc (memlen);
		876	UNLOCK (wrklock);
		877
		878	if (dirp && u && names)
		879	for (;;)
		880	{
		881	errno = 0;
		882	readdir_r (dirp, &u->d, &entp);
		883
		884	if (!entp)
		885	break;
		886
		887	name = entp->d_name;
		888
		889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		890	{
		891	int len = strlen (name) + 1;
		892
		893	res++;
		894
		895	while (memofs + len > memlen)
		896	{
		897	memlen *= 2;
		898	LOCK (wrklock);
		899	req->data2ptr = names = realloc (names, memlen);
		900	UNLOCK (wrklock);
		901
		902	if (!names)
		903	break;
		904	}
		905
		906	memcpy (names + memofs, name, len);
		907	memofs += len;
		908	}
		909	}
		910
		911	if (errno)
		912	res = -1;
		913
		914	req->result = res;
505	}	915	}
506		916
507	/*****************************************************************************/	917	/*****************************************************************************/
508		918
509	static void *
510	aio_proc (void *thr_arg)	919	static void *aio_proc (void *thr_arg)
511	{	920	{
512	aio_req req;	921	aio_req req;
513	int type;	922	int type;
		923	worker *self = (worker *)thr_arg;
514		924
515	do	925	do
516	{	926	{
517	pthread_mutex_lock (&reqlock);	927	LOCK (reqlock);
518		928
519	for (;;)	929	for (;;)
520	{	930	{
521	req = reqs;	931	self->req = req = reqq_shift (&req_queue);
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528		932
529	if (req)	933	if (req)
530	break;	934	break;
531		935
532	pthread_cond_wait (&reqwait, &reqlock);	936	pthread_cond_wait (&reqwait, &reqlock);
533	}	937	}
534		938
535	pthread_mutex_unlock (&reqlock);	939	UNLOCK (reqlock);
536		940
537	errno = 0; /* strictly unnecessary */	941	errno = 0; /* strictly unnecessary */
		942	type = req->type; /* remember type for QUIT check */
538		943
539	type = req->type;	944	if (!(req->flags & FLAG_CANCELLED))
540
541	switch (type)	945	switch (type)
542	{	946	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	947	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;	948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545		949
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	950	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;	951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
548		952
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552		956
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;	958	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558		964
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;	966	case REQ_FSYNC: req->result = fsync (req->fd); break;
		967	case REQ_READDIR: scandir_ (req, self); break;
561		968
		969	case REQ_BUSY:
		970	{
		971	struct timeval tv;
		972
		973	tv.tv_sec = req->fd;
		974	tv.tv_usec = req->fd2;
		975
		976	req->result = select (0, 0, 0, 0, &tv);
		977	}
		978
		979	case REQ_GROUP:
		980	case REQ_NOP:
562	case REQ_QUIT:	981	case REQ_QUIT:
563	break;	982	break;
564		983
565	default:	984	default:
566	req->result = ENOSYS;	985	req->result = ENOSYS;
567	break;	986	break;
568	}	987	}
569		988
570	req->errorno = errno;	989	req->errorno = errno;
571		990
572	pthread_mutex_lock (&reslock);	991	LOCK (reslock);
573		992
574	req->next = 0;	993	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 */	994	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);	995	write (respipe [1], &respipe, 1);
587	}
588		996
589	pthread_mutex_unlock (&reslock);	997	self->req = 0;
		998	worker_clear (self);
		999
		1000	UNLOCK (reslock);
590	}	1001	}
591	while (type != REQ_QUIT);	1002	while (type != REQ_QUIT);
592		1003
		1004	LOCK (wrklock);
		1005	worker_free (self);
		1006	UNLOCK (wrklock);
		1007
593	return 0;	1008	return 0;
		1009	}
		1010
		1011	/*****************************************************************************/
		1012
		1013	static void atfork_prepare (void)
		1014	{
		1015	LOCK (wrklock);
		1016	LOCK (reqlock);
		1017	LOCK (reslock);
		1018	#if !HAVE_PREADWRITE
		1019	LOCK (preadwritelock);
		1020	#endif
		1021	#if !HAVE_READDIR_R
		1022	LOCK (readdirlock);
		1023	#endif
		1024	}
		1025
		1026	static void atfork_parent (void)
		1027	{
		1028	#if !HAVE_READDIR_R
		1029	UNLOCK (readdirlock);
		1030	#endif
		1031	#if !HAVE_PREADWRITE
		1032	UNLOCK (preadwritelock);
		1033	#endif
		1034	UNLOCK (reslock);
		1035	UNLOCK (reqlock);
		1036	UNLOCK (wrklock);
		1037	}
		1038
		1039	static void atfork_child (void)
		1040	{
		1041	aio_req prv;
		1042
		1043	while (prv = reqq_shift (&req_queue))
		1044	req_free (prv);
		1045
		1046	while (prv = reqq_shift (&res_queue))
		1047	req_free (prv);
		1048
		1049	while (wrk_first.next != &wrk_first)
		1050	{
		1051	worker *wrk = wrk_first.next;
		1052
		1053	if (wrk->req)
		1054	req_free (wrk->req);
		1055
		1056	worker_clear (wrk);
		1057	worker_free (wrk);
		1058	}
		1059
		1060	started = 0;
		1061	nreqs = 0;
		1062
		1063	close (respipe [0]);
		1064	close (respipe [1]);
		1065	create_pipe ();
		1066
		1067	atfork_parent ();
594	}	1068	}
595		1069
596	#define dREQ \	1070	#define dREQ \
597	aio_req req; \	1071	aio_req req; \
		1072	int req_pri = next_pri; \
		1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
598	\	1074	\
599	if (SvOK (callback) && !SvROK (callback)) \	1075	if (SvOK (callback) && !SvROK (callback)) \
600	croak ("clalback must be undef or of reference type"); \	1076	croak ("callback must be undef or of reference type"); \
601	\	1077	\
602	Newz (0, req, 1, aio_cb); \	1078	Newz (0, req, 1, aio_cb); \
603	if (!req) \	1079	if (!req) \
604	croak ("out of memory during aio_req allocation"); \	1080	croak ("out of memory during aio_req allocation"); \
605	\	1081	\
606	req->callback = newSVsv (callback);	1082	req->callback = newSVsv (callback); \
		1083	req->pri = req_pri
		1084
		1085	#define REQ_SEND \
		1086	req_send (req); \
		1087	\
		1088	if (GIMME_V != G_VOID) \
		1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));
607		1090
608	MODULE = IO::AIO PACKAGE = IO::AIO	1091	MODULE = IO::AIO PACKAGE = IO::AIO
609		1092
610	PROTOTYPES: ENABLE	1093	PROTOTYPES: ENABLE
611		1094
612	BOOT:	1095	BOOT:
613	{	1096	{
		1097	HV *stash = gv_stashpv ("IO::AIO", 1);
		1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1101
614	create_pipe ();	1102	create_pipe ();
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}	1104	}
617		1105
618	void	1106	void
619	min_parallel(nthreads)	1107	min_parallel (nthreads)
620	int nthreads	1108	int nthreads
621	PROTOTYPE: $	1109	PROTOTYPE: $
622		1110
623	void	1111	void
624	max_parallel(nthreads)	1112	max_parallel (nthreads)
625	int nthreads	1113	int nthreads
626	PROTOTYPE: $	1114	PROTOTYPE: $
627		1115
628	int
629	max_outstanding(nreqs)
630	int nreqs
631	PROTOTYPE: $
632	CODE:
633	RETVAL = max_outstanding;
634	max_outstanding = nreqs;
635
636	void	1116	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
638	SV * pathname	1118	SV * pathname
639	int flags	1119	int flags
640	int mode	1120	int mode
641	SV * callback	1121	SV * callback
642	PROTOTYPE: $$$;$	1122	PROTOTYPE: $$$;$
643	CODE:	1123	PPCODE:
644	{	1124	{
645	dREQ;	1125	dREQ;
646		1126
647	req->type = REQ_OPEN;	1127	req->type = REQ_OPEN;
648	req->data = newSVsv (pathname);	1128	req->data = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	1129	req->dataptr = SvPVbyte_nolen (req->data);
650	req->fd = flags;	1130	req->fd = flags;
651	req->mode = mode;	1131	req->mode = mode;
652		1132
653	send_req (req);	1133	REQ_SEND;
654	}	1134	}
655		1135
656	void	1136	void
657	aio_close(fh,callback=&PL_sv_undef)	1137	aio_close (fh,callback=&PL_sv_undef)
658	SV * fh	1138	SV * fh
659	SV * callback	1139	SV * callback
660	PROTOTYPE: $;$	1140	PROTOTYPE: $;$
661	ALIAS:	1141	ALIAS:
662	aio_close = REQ_CLOSE	1142	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	1143	aio_fsync = REQ_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	1144	aio_fdatasync = REQ_FDATASYNC
665	CODE:	1145	PPCODE:
666	{	1146	{
667	dREQ;	1147	dREQ;
668		1148
669	req->type = ix;	1149	req->type = ix;
670	req->fh = newSVsv (fh);	1150	req->fh = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
672		1152
673	send_req (req);	1153	REQ_SEND (req);
674	}	1154	}
675		1155
676	void	1156	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
678	SV * fh	1158	SV * fh
679	UV offset	1159	UV offset
680	UV length	1160	UV length
681	SV * data	1161	SV * data
682	UV dataoffset	1162	UV dataoffset
683	SV * callback	1163	SV * callback
684	ALIAS:	1164	ALIAS:
685	aio_read = REQ_READ	1165	aio_read = REQ_READ
686	aio_write = REQ_WRITE	1166	aio_write = REQ_WRITE
687	PROTOTYPE: $$$$$;$	1167	PROTOTYPE: $$$$$;$
688	CODE:	1168	PPCODE:
689	{	1169	{
690	aio_req req;	1170	aio_req req;
691	STRLEN svlen;	1171	STRLEN svlen;
692	char *svptr = SvPVbyte (data, svlen);	1172	char *svptr = SvPVbyte (data, svlen);
693		1173
…		…
731	{	1211	{
732	SvREADONLY_on (data);	1212	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	1213	req->data2ptr = (void *)data;
734	}	1214	}
735		1215
736	send_req (req);	1216	REQ_SEND;
737	}	1217	}
738	}	1218	}
739		1219
740	void	1220	void
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
742	SV * out_fh	1222	SV * out_fh
743	SV * in_fh	1223	SV * in_fh
744	UV in_offset	1224	UV in_offset
745	UV length	1225	UV length
746	SV * callback	1226	SV * callback
747	PROTOTYPE: $$$$;$	1227	PROTOTYPE: $$$$;$
748	CODE:	1228	PPCODE:
749	{	1229	{
750	dREQ;	1230	dREQ;
751		1231
752	req->type = REQ_SENDFILE;	1232	req->type = REQ_SENDFILE;
753	req->fh = newSVsv (out_fh);	1233	req->fh = newSVsv (out_fh);
…		…
755	req->fh2 = newSVsv (in_fh);	1235	req->fh2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
757	req->offset = in_offset;	1237	req->offset = in_offset;
758	req->length = length;	1238	req->length = length;
759		1239
760	send_req (req);	1240	REQ_SEND;
761	}	1241	}
762		1242
763	void	1243	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
765	SV * fh	1245	SV * fh
766	UV offset	1246	UV offset
767	IV length	1247	IV length
768	SV * callback	1248	SV * callback
769	PROTOTYPE: $$$;$	1249	PROTOTYPE: $$$;$
770	CODE:	1250	PPCODE:
771	{	1251	{
772	dREQ;	1252	dREQ;
773		1253
774	req->type = REQ_READAHEAD;	1254	req->type = REQ_READAHEAD;
775	req->fh = newSVsv (fh);	1255	req->fh = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
777	req->offset = offset;	1257	req->offset = offset;
778	req->length = length;	1258	req->length = length;
779		1259
780	send_req (req);	1260	REQ_SEND;
781	}	1261	}
782		1262
783	void	1263	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	1264	aio_stat (fh_or_path,callback=&PL_sv_undef)
785	SV * fh_or_path	1265	SV * fh_or_path
786	SV * callback	1266	SV * callback
787	ALIAS:	1267	ALIAS:
788	aio_stat = REQ_STAT	1268	aio_stat = REQ_STAT
789	aio_lstat = REQ_LSTAT	1269	aio_lstat = REQ_LSTAT
790	CODE:	1270	PPCODE:
791	{	1271	{
792	dREQ;	1272	dREQ;
793		1273
794	New (0, req->statdata, 1, Stat_t);	1274	New (0, req->statdata, 1, Stat_t);
795	if (!req->statdata)	1275	if (!req->statdata)
796	{	1276	{
797	free_req (req);	1277	req_free (req);
798	croak ("out of memory during aio_req->statdata allocation");	1278	croak ("out of memory during aio_req->statdata allocation");
799	}	1279	}
800		1280
801	if (SvPOK (fh_or_path))	1281	if (SvPOK (fh_or_path))
802	{	1282	{
…		…
809	req->type = REQ_FSTAT;	1289	req->type = REQ_FSTAT;
810	req->fh = newSVsv (fh_or_path);	1290	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
812	}	1292	}
813		1293
814	send_req (req);	1294	REQ_SEND;
815	}	1295	}
816		1296
817	void	1297	void
818	aio_unlink(pathname,callback=&PL_sv_undef)	1298	aio_unlink (pathname,callback=&PL_sv_undef)
819	SV * pathname	1299	SV * pathname
820	SV * callback	1300	SV * callback
821	ALIAS:	1301	ALIAS:
822	aio_unlink = REQ_UNLINK	1302	aio_unlink = REQ_UNLINK
823	aio_rmdir = REQ_RMDIR	1303	aio_rmdir = REQ_RMDIR
		1304	aio_readdir = REQ_READDIR
824	CODE:	1305	PPCODE:
825	{	1306	{
826	dREQ;	1307	dREQ;
827		1308
828	req->type = ix;	1309	req->type = ix;
829	req->data = newSVsv (pathname);	1310	req->data = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	1311	req->dataptr = SvPVbyte_nolen (req->data);
831		1312
832	send_req (req);	1313	REQ_SEND;
833	}	1314	}
834		1315
835	void	1316	void
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)
837	SV * oldpath	1318	SV * oldpath
838	SV * newpath	1319	SV * newpath
839	SV * callback	1320	SV * callback
		1321	ALIAS:
		1322	aio_link = REQ_LINK
		1323	aio_symlink = REQ_SYMLINK
		1324	aio_rename = REQ_RENAME
840	CODE:	1325	PPCODE:
841	{	1326	{
842	dREQ;	1327	dREQ;
843		1328
844	req->type = REQ_SYMLINK;	1329	req->type = ix;
845	req->fh = newSVsv (oldpath);	1330	req->fh = newSVsv (oldpath);
846	req->data2ptr = SvPVbyte_nolen (req->fh);	1331	req->data2ptr = SvPVbyte_nolen (req->fh);
847	req->data = newSVsv (newpath);	1332	req->data = newSVsv (newpath);
848	req->dataptr = SvPVbyte_nolen (req->data);	1333	req->dataptr = SvPVbyte_nolen (req->data);
849		1334
850	send_req (req);	1335	REQ_SEND;
851	}	1336	}
852		1337
853	void	1338	void
		1339	aio_busy (delay,callback=&PL_sv_undef)
		1340	double delay
		1341	SV * callback
		1342	PPCODE:
		1343	{
		1344	dREQ;
		1345
		1346	req->type = REQ_BUSY;
		1347	req->fd = delay < 0. ? 0 : delay;
		1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_group (callback=&PL_sv_undef)
		1355	SV * callback
		1356	PROTOTYPE: ;$
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->type = REQ_GROUP;
		1362	req_send (req);
		1363
		1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1365	}
		1366
		1367	void
		1368	aio_nop (callback=&PL_sv_undef)
		1369	SV * callback
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->type = REQ_NOP;
		1375
		1376	REQ_SEND;
		1377	}
		1378
		1379	void
		1380	aioreq_pri (int pri = DEFAULT_PRI)
		1381	CODE:
		1382	if (pri < PRI_MIN) pri = PRI_MIN;
		1383	if (pri > PRI_MAX) pri = PRI_MAX;
		1384	next_pri = pri + PRI_BIAS;
		1385
		1386	void
		1387	aioreq_nice (int nice = 0)
		1388	CODE:
		1389	nice = next_pri - nice;
		1390	if (nice < PRI_MIN) nice = PRI_MIN;
		1391	if (nice > PRI_MAX) nice = PRI_MAX;
		1392	next_pri = nice + PRI_BIAS;
		1393
		1394	void
854	flush()	1395	flush ()
855	PROTOTYPE:	1396	PROTOTYPE:
856	CODE:	1397	CODE:
857	while (nreqs)	1398	while (nreqs)
858	{	1399	{
859	poll_wait ();	1400	poll_wait ();
860	poll_cb ();	1401	poll_cb (0);
861	}	1402	}
862		1403
863	void	1404	void
864	poll()	1405	poll()
865	PROTOTYPE:	1406	PROTOTYPE:
866	CODE:	1407	CODE:
867	if (nreqs)	1408	if (nreqs)
868	{	1409	{
869	poll_wait ();	1410	poll_wait ();
870	poll_cb ();	1411	poll_cb (0);
871	}	1412	}
872		1413
873	int	1414	int
874	poll_fileno()	1415	poll_fileno()
875	PROTOTYPE:	1416	PROTOTYPE:
…		…
880		1421
881	int	1422	int
882	poll_cb(...)	1423	poll_cb(...)
883	PROTOTYPE:	1424	PROTOTYPE:
884	CODE:	1425	CODE:
885	RETVAL = poll_cb ();	1426	RETVAL = poll_cb (0);
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	int
		1431	poll_some(int max = 0)
		1432	PROTOTYPE: $
		1433	CODE:
		1434	RETVAL = poll_cb (max);
886	OUTPUT:	1435	OUTPUT:
887	RETVAL	1436	RETVAL
888		1437
889	void	1438	void
890	poll_wait()	1439	poll_wait()
…		…
899	CODE:	1448	CODE:
900	RETVAL = nreqs;	1449	RETVAL = nreqs;
901	OUTPUT:	1450	OUTPUT:
902	RETVAL	1451	RETVAL
903		1452
		1453	PROTOTYPES: DISABLE
		1454
		1455	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1456
		1457	void
		1458	cancel (aio_req_ornot req)
		1459	CODE:
		1460	req_cancel (req);
		1461
		1462	void
		1463	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1464	CODE:
		1465	SvREFCNT_dec (req->callback);
		1466	req->callback = newSVsv (callback);
		1467
		1468	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1469
		1470	void
		1471	add (aio_req grp, ...)
		1472	PPCODE:
		1473	{
		1474	int i;
		1475	aio_req req;
		1476
		1477	if (grp->fd == 2)
		1478	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1479
		1480	for (i = 1; i < items; ++i )
		1481	{
		1482	if (GIMME_V != G_VOID)
		1483	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1484
		1485	req = SvAIO_REQ (ST (i));
		1486
		1487	if (req)
		1488	{
		1489	++grp->length;
		1490	req->grp = grp;
		1491
		1492	req->grp_prev = 0;
		1493	req->grp_next = grp->grp_first;
		1494
		1495	if (grp->grp_first)
		1496	grp->grp_first->grp_prev = req;
		1497
		1498	grp->grp_first = req;
		1499	}
		1500	}
		1501	}
		1502
		1503	void
		1504	cancel_subs (aio_req_ornot req)
		1505	CODE:
		1506	req_cancel_subs (req);
		1507
		1508	void
		1509	result (aio_req grp, ...)
		1510	CODE:
		1511	{
		1512	int i;
		1513	AV *av = newAV ();
		1514
		1515	for (i = 1; i < items; ++i )
		1516	av_push (av, newSVsv (ST (i)));
		1517
		1518	SvREFCNT_dec (grp->data);
		1519	grp->data = (SV *)av;
		1520	}
		1521
		1522	void
		1523	limit (aio_req grp, int limit)
		1524	CODE:
		1525	grp->fd2 = limit;
		1526	aio_grp_feed (grp);
		1527
		1528	void
		1529	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1530	CODE:
		1531	{
		1532	SvREFCNT_dec (grp->fh2);
		1533	grp->fh2 = newSVsv (callback);
		1534
		1535	if (grp->fd2 <= 0)
		1536	grp->fd2 = 2;
		1537
		1538	aio_grp_feed (grp);
		1539	}
		1540

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