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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.26 by root, Wed Aug 17 03:52:20 2005 UTC vs.
Revision 1.77 by root, Thu Oct 26 13:25:40 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
		19	#include <pthread.h>
		20
		21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
10	#include <sys/types.h>	25	#include <sys/types.h>
11	#include <sys/stat.h>	26	#include <sys/stat.h>
12		27	#include <limits.h>
13	#include <unistd.h>	28	#include <unistd.h>
14	#include <fcntl.h>	29	#include <fcntl.h>
15	#include <signal.h>	30	#include <signal.h>
16	#include <sched.h>	31	#include <sched.h>
17		32
18	#include <pthread.h>	33	#if HAVE_SENDFILE
		34	# if __linux
		35	# include <sys/sendfile.h>
		36	# elif __freebsd
		37	# include <sys/socket.h>
		38	# include <sys/uio.h>
		39	# elif __hpux
		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
		45	# endif
		46	#endif
19		47
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	/* used for struct dirent, AIX doesn't provide it */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	#ifndef NAME_MAX
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	50	# define NAME_MAX 4096
		51	#endif
		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
23		57
24	#if __ia64	58	#if __ia64
25	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	62	#else
27	# define STACKSIZE 4096	63	# define STACKSIZE 16384
28	#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;
29		76
30	enum {	77	enum {
31	REQ_QUIT,	78	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	79	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		81	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	83	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	85	REQ_READDIR,
		86	REQ_LINK, REQ_SYMLINK,
		87	REQ_GROUP, REQ_NOP,
		88	REQ_BUSY,
38	};	89	};
39		90
		91	#define AIO_REQ_KLASS "IO::AIO::REQ"
		92	#define AIO_GRP_KLASS "IO::AIO::GRP"
		93
40	typedef struct aio_cb {	94	typedef struct aio_cb
		95	{
41	struct aio_cb *volatile next;	96	struct aio_cb *volatile next;
42		97
43	int type;	98	SV *data, *callback;
44		99	SV *fh, *fh2;
45	int fd;	100	void *dataptr, *data2ptr;
		101	Stat_t *statdata;
46	off_t offset;	102	off_t offset;
47	size_t length;	103	size_t length;
48	ssize_t result;	104	ssize_t result;
		105
		106	STRLEN dataoffset;
		107	int type;
		108	int fd, fd2;
		109	int errorno;
49	mode_t mode; /* open */	110	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		111
55	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;
56	} aio_cb;	117	} aio_cb;
57		118
		119	enum {
		120	FLAG_CANCELLED = 0x01,
		121	};
		122
58	typedef aio_cb *aio_req;	123	typedef aio_cb *aio_req;
		124	typedef aio_cb *aio_req_ornot;
59		125
		126	enum {
		127	PRI_MIN = -4,
		128	PRI_MAX = 4,
		129
		130	DEFAULT_PRI = 0,
		131	PRI_BIAS = -PRI_MIN,
		132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		133	};
		134
		135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		136
60	static int started;	137	static int started, wanted;
61	static volatile int nreqs;	138	static volatile int nreqs;
62	static int max_outstanding = 1<<30;
63	static int respipe [2];	139	static int respipe [2];
64		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
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	190	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	191	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	192	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		193
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	194	/*
71	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;
72		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);
73	static void free_req (aio_req req)	250	static void req_free (aio_req req);
74	{	251	static void req_cancel (aio_req req);
75	if (req->data)
76	SvREFCNT_dec (req->data);
77		252
		253	/* must be called at most once */
		254	static SV *req_sv (aio_req req, const char *klass)
		255	{
78	if (req->fh)	256	if (!req->self)
		257	{
		258	req->self = (SV *)newHV ();
		259	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		260	}
		261
		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	{
79	SvREFCNT_dec (req->fh);	301	SvREFCNT_dec (grp->fh2);
80		302	grp->fh2 = 0;
81	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)	303	break;
82	Safefree (req->statdata);	304	}
83
84	if (req->callback)
85	SvREFCNT_dec (req->callback);
86
87	Safefree (req);
88	}
89
90	static void
91	poll_wait ()
92	{
93	if (nreqs && !ress)
94	{	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	{
95	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
96	FD_ZERO(&rfd);	341	FD_ZERO(&rfd);
97	FD_SET(respipe [0], &rfd);	342	FD_SET(respipe [0], &rfd);
98		343
99	select (respipe [0] + 1, &rfd, 0, 0, 0);	344	select (respipe [0] + 1, &rfd, 0, 0, 0);
100	}	345	}
101	}	346	}
102		347
103	static int	348	static void req_invoke (aio_req req)
104	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)
105	{	502	{
106	dSP;	503	dSP;
107	int count = 0;	504	int count = 0;
108	int do_croak = 0;	505	int do_croak = 0;
109	aio_req req, prv;	506	aio_req req;
110		507
111	pthread_mutex_lock (&reslock);	508	while (max <= 0 || count < max)
112
113	{	509	{
		510	LOCK (reslock);
		511	req = reqq_shift (&res_queue);
		512
		513	if (req)
		514	{
		515	if (!res_queue.size)
		516	{
114	/* read any signals sent by the worker threads */	517	/* read any signals sent by the worker threads */
115	char buf [32];	518	char buf [32];
116	while (read (respipe [0], buf, 32) == 32)	519	while (read (respipe [0], buf, 32) == 32)
		520	;
		521	}
117	;	522	}
118	}
119		523
120	req = ress;	524	UNLOCK (reslock);
121	ress = rese = 0;
122		525
123	pthread_mutex_unlock (&reslock);	526	if (!req)
		527	break;
124		528
125	while (req)
126	{
127	nreqs--;	529	--nreqs;
128		530
129	if (req->type == REQ_QUIT)	531	if (req->type == REQ_QUIT)
130	started--;	532	started--;
		533	else if (req->type == REQ_GROUP && req->length)
		534	{
		535	req->fd = 1; /* mark request as delayed */
		536	continue;
		537	}
131	else	538	else
132	{	539	{
133	int errorno = errno;
134	errno = req->errorno;
135
136	if (req->type == REQ_READ)	540	if (req->type == REQ_READ)
137	SvCUR_set (req->data, req->dataoffset	541	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
138	+ req->result > 0 ? req->result : 0);
139		542
140	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)	543	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		544	SvREADONLY_off (req->data);
		545
		546	if (req->statdata)
141	{	547	{
142	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	548	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
143	PL_laststatval = req->result;	549	PL_laststatval = req->result;
144	PL_statcache = *(req->statdata);	550	PL_statcache = *(req->statdata);
145	}	551	}
146		552
147	ENTER;	553	req_invoke (req);
148	PUSHMARK (SP);
149	XPUSHs (sv_2mortal (newSViv (req->result)));
150		554
151	if (req->type == REQ_OPEN)
152	{
153	/* convert fd to fh */
154	SV *fh;
155
156	PUTBACK;
157	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
158	SPAGAIN;
159
160	fh = SvREFCNT_inc (POPs);
161
162	PUSHMARK (SP);
163	XPUSHs (sv_2mortal (fh));
164	}
165
166	if (SvOK (req->callback))
167	{
168	PUTBACK;
169	call_sv (req->callback, G_VOID | G_EVAL);
170	SPAGAIN;
171	}
172
173	LEAVE;
174
175	do_croak = SvTRUE (ERRSV);
176
177	errno = errorno;
178	count++;	555	count++;
179	}	556	}
180		557
181	prv = req;	558	req_free (req);
182	req = req->next;
183	free_req (prv);
184
185	if (do_croak)
186	croak (0);
187	}	559	}
188		560
189	return count;	561	return count;
190	}	562	}
191		563
192	static void *aio_proc(void *arg);	564	static void *aio_proc(void *arg);
193		565
194	static void
195	start_thread (void)	566	static void start_thread (void)
196	{	567	{
197	sigset_t fullsigset, oldsigset;	568	sigset_t fullsigset, oldsigset;
198	pthread_t tid;
199	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");
200		575
201	pthread_attr_init (&attr);	576	pthread_attr_init (&attr);
202	pthread_attr_setstacksize (&attr, STACKSIZE);	577	pthread_attr_setstacksize (&attr, STACKSIZE);
203	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	578	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
204		579
205	sigfillset (&fullsigset);	580	sigfillset (&fullsigset);
		581
		582	LOCK (wrklock);
206	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	583	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
207		584
208	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;
209	started++;	591	started++;
		592	}
		593	else
		594	free (wrk);
210		595
211	sigprocmask (SIG_SETMASK, &oldsigset, 0);	596	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		597	UNLOCK (wrklock);
212	}	598	}
213		599
214	static void	600	static void req_send (aio_req req)
215	send_req (aio_req req)
216	{	601	{
		602	while (started < wanted && nreqs >= started)
		603	start_thread ();
		604
217	nreqs++;	605	++nreqs;
218		606
219	pthread_mutex_lock (&reqlock);	607	LOCK (reqlock);
220		608	reqq_push (&req_queue, req);
221	req->next = 0;
222
223	if (reqe)
224	{
225	reqe->next = req;
226	reqe = req;
227	}
228	else
229	reqe = reqs = req;
230
231	pthread_cond_signal (&reqwait);	609	pthread_cond_signal (&reqwait);
232	pthread_mutex_unlock (&reqlock);	610	UNLOCK (reqlock);
233
234	while (nreqs > max_outstanding)
235	{
236	poll_wait ();
237	poll_cb ();
238	}
239	}	611	}
240		612
241	static void	613	static void end_thread (void)
242	end_thread (void)
243	{	614	{
244	aio_req req;	615	aio_req req;
		616
245	Newz (0, req, 1, aio_cb);	617	Newz (0, req, 1, aio_cb);
		618
246	req->type = REQ_QUIT;	619	req->type = REQ_QUIT;
		620	req->pri = PRI_MAX + PRI_BIAS;
247		621
248	send_req (req);	622	req_send (req);
249	}	623	}
250
251		624
252	static void min_parallel (int nthreads)	625	static void min_parallel (int nthreads)
253	{	626	{
254	while (nthreads > started)	627	if (wanted < nthreads)
255	start_thread ();	628	wanted = nthreads;
256	}	629	}
257		630
258	static void max_parallel (int nthreads)	631	static void max_parallel (int nthreads)
259	{	632	{
260	int cur = started;	633	int cur = started;
		634
		635	if (wanted > nthreads)
		636	wanted = nthreads;
		637
261	while (cur > nthreads)	638	while (cur > wanted)
262	{	639	{
263	end_thread ();	640	end_thread ();
264	cur--;	641	cur--;
265	}	642	}
266		643
267	while (started > nthreads)	644	while (started > wanted)
268	{	645	{
269	poll_wait ();	646	poll_wait ();
270	poll_cb ();	647	poll_cb (0);
271	}	648	}
272	}	649	}
273		650
274	static void create_pipe ()	651	static void create_pipe ()
275	{	652	{
…		…
279	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	656	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
280	croak ("cannot set result pipe to nonblocking mode");	657	croak ("cannot set result pipe to nonblocking mode");
281		658
282	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	659	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
283	croak ("cannot set result pipe to nonblocking mode");	660	croak ("cannot set result pipe to nonblocking mode");
284	}
285
286	static void atfork_prepare (void)
287	{
288	pthread_mutex_lock (&frklock);
289	pthread_mutex_lock (&reqlock);
290	pthread_mutex_lock (&reslock);
291	}
292
293	static void atfork_parent (void)
294	{
295	pthread_mutex_unlock (&reslock);
296	pthread_mutex_unlock (&reqlock);
297	pthread_mutex_unlock (&frklock);
298	}
299
300	static void atfork_child (void)
301	{
302	int restart = started;
303	started = 0;
304
305	while (reqs)
306	{
307	free_req (reqs);
308	reqs = reqs->next;
309	}
310
311	reqs = reqe = 0;
312
313	while (ress)
314	{
315	free_req (ress);
316	ress = ress->next;
317	}
318
319	ress = rese = 0;
320
321	close (respipe [0]);
322	close (respipe [1]);
323
324	create_pipe ();
325
326	atfork_parent ();
327
328	min_parallel (restart);
329	}	661	}
330		662
331	/*****************************************************************************/	663	/*****************************************************************************/
332	/* work around various missing functions */	664	/* work around various missing functions */
333		665
…		…
338	/*	670	/*
339	* make our pread/pwrite safe against themselves, but not against	671	* make our pread/pwrite safe against themselves, but not against
340	* 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,
341	* but that's your problem, not mine.	673	* but that's your problem, not mine.
342	*/	674	*/
343	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	675	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
344		676
345	static ssize_t	677	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
346	pread (int fd, void *buf, size_t count, off_t offset)
347	{	678	{
348	ssize_t res;	679	ssize_t res;
349	off_t ooffset;	680	off_t ooffset;
350		681
351	pthread_mutex_lock (&iolock);	682	LOCK (preadwritelock);
352	ooffset = lseek (fd, 0, SEEK_CUR);	683	ooffset = lseek (fd, 0, SEEK_CUR);
353	lseek (fd, offset, SEEK_SET);	684	lseek (fd, offset, SEEK_SET);
354	res = read (fd, buf, count);	685	res = read (fd, buf, count);
355	lseek (fd, ooffset, SEEK_SET);	686	lseek (fd, ooffset, SEEK_SET);
356	pthread_mutex_unlock (&iolock);	687	UNLOCK (preadwritelock);
357		688
358	return res;	689	return res;
359	}	690	}
360		691
361	static ssize_t
362	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)
363	{	693	{
364	ssize_t res;	694	ssize_t res;
365	off_t ooffset;	695	off_t ooffset;
366		696
367	pthread_mutex_lock (&iolock);	697	LOCK (preadwritelock);
368	ooffset = lseek (fd, 0, SEEK_CUR);	698	ooffset = lseek (fd, 0, SEEK_CUR);
369	lseek (fd, offset, SEEK_SET);	699	lseek (fd, offset, SEEK_SET);
370	res = write (fd, buf, count);	700	res = write (fd, buf, count);
371	lseek (fd, offset, SEEK_SET);	701	lseek (fd, offset, SEEK_SET);
372	pthread_mutex_unlock (&iolock);	702	UNLOCK (preadwritelock);
373		703
374	return res;	704	return res;
375	}	705	}
376	#endif	706	#endif
377		707
378	#if !HAVE_FDATASYNC	708	#if !HAVE_FDATASYNC
379	# define fdatasync fsync	709	# define fdatasync fsync
380	#endif	710	#endif
381		711
382	#if !HAVE_READAHEAD	712	#if !HAVE_READAHEAD
383	# define readahead aio_readahead	713	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
384		714
385	static char readahead_buf[4096];	715	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
386
387	static ssize_t
388	readahead (int fd, off_t offset, size_t count)
389	{	716	{
		717	dBUF;
		718
390	while (count > 0)	719	while (count > 0)
391	{	720	{
392	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	721	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
393		722
394	pread (fd, readahead_buf, len, offset);	723	pread (fd, aio_buf, len, offset);
395	offset += len;	724	offset += len;
396	count -= len;	725	count -= len;
397	}	726	}
398		727
399	errno = 0;	728	errno = 0;
400	}	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	}
		761	#endif
		762
		763	/* sendfile always needs emulation */
		764	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		765	{
		766	ssize_t res;
		767
		768	if (!count)
		769	return 0;
		770
		771	#if HAVE_SENDFILE
		772	# if __linux
		773	res = sendfile (ofd, ifd, &offset, count);
		774
		775	# elif __freebsd
		776	/*
		777	* Of course, the freebsd sendfile is a dire hack with no thoughts
		778	* wasted on making it similar to other I/O functions.
		779	*/
		780	{
		781	off_t sbytes;
		782	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		783
		784	if (res < 0 && sbytes)
		785	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		786	res = sbytes;
		787	}
		788
		789	# elif __hpux
		790	res = sendfile (ofd, ifd, offset, count, 0, 0);
		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
401	#endif	808	# endif
		809	#else
		810	res = -1;
		811	errno = ENOSYS;
		812	#endif
		813
		814	if (res < 0
		815	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		816	#if __solaris
		817	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		818	#endif
		819	)
		820	)
		821	{
		822	/* emulate sendfile. this is a major pain in the ass */
		823	dBUF;
		824
		825	res = 0;
		826
		827	while (count)
		828	{
		829	ssize_t cnt;
		830
		831	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		832
		833	if (cnt <= 0)
		834	{
		835	if (cnt && !res) res = -1;
		836	break;
		837	}
		838
		839	cnt = write (ofd, aio_buf, cnt);
		840
		841	if (cnt <= 0)
		842	{
		843	if (cnt && !res) res = -1;
		844	break;
		845	}
		846
		847	offset += cnt;
		848	res += cnt;
		849	count -= cnt;
		850	}
		851	}
		852
		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;
		915	}
402		916
403	/*****************************************************************************/	917	/*****************************************************************************/
404		918
405	static void *
406	aio_proc (void *thr_arg)	919	static void *aio_proc (void *thr_arg)
407	{	920	{
408	aio_req req;	921	aio_req req;
409	int type;	922	int type;
		923	worker *self = (worker *)thr_arg;
410		924
411	do	925	do
412	{	926	{
413	pthread_mutex_lock (&reqlock);	927	LOCK (reqlock);
414		928
415	for (;;)	929	for (;;)
416	{	930	{
417	req = reqs;	931	self->req = req = reqq_shift (&req_queue);
418
419	if (reqs)
420	{
421	reqs = reqs->next;
422	if (!reqs) reqe = 0;
423	}
424		932
425	if (req)	933	if (req)
426	break;	934	break;
427		935
428	pthread_cond_wait (&reqwait, &reqlock);	936	pthread_cond_wait (&reqwait, &reqlock);
429	}	937	}
430		938
431	pthread_mutex_unlock (&reqlock);	939	UNLOCK (reqlock);
432		940
433	errno = 0; /* strictly unnecessary */	941	errno = 0; /* strictly unnecessary */
		942	type = req->type; /* remember type for QUIT check */
434		943
435	type = req->type;	944	if (!(req->flags & FLAG_CANCELLED))
436
437	switch (type)	945	switch (type)
438	{	946	{
439	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;
440	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;
441		949
442	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;
		951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
443		952
444	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
445	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
446	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
447		956
448	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;
449	case REQ_CLOSE: req->result = close (req->fd); break;	958	case REQ_CLOSE: req->result = close (req->fd); break;
450	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
451	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;
452	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
453		964
454	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
455	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;
456		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:
457	case REQ_QUIT:	981	case REQ_QUIT:
458	break;	982	break;
459		983
460	default:	984	default:
461	req->result = ENOSYS;	985	req->result = ENOSYS;
462	break;	986	break;
463	}	987	}
464		988
465	req->errorno = errno;	989	req->errorno = errno;
466		990
467	pthread_mutex_lock (&reslock);	991	LOCK (reslock);
468		992
469	req->next = 0;	993	if (!reqq_push (&res_queue, req))
470
471	if (rese)
472	{
473	rese->next = req;
474	rese = req;
475	}
476	else
477	{
478	rese = ress = req;
479
480	/* write a dummy byte to the pipe so fh becomes ready */	994	/* write a dummy byte to the pipe so fh becomes ready */
481	write (respipe [1], &respipe, 1);	995	write (respipe [1], &respipe, 1);
482	}
483		996
484	pthread_mutex_unlock (&reslock);	997	self->req = 0;
		998	worker_clear (self);
		999
		1000	UNLOCK (reslock);
485	}	1001	}
486	while (type != REQ_QUIT);	1002	while (type != REQ_QUIT);
487		1003
		1004	LOCK (wrklock);
		1005	worker_free (self);
		1006	UNLOCK (wrklock);
		1007
488	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 ();
489	}	1068	}
490		1069
491	#define dREQ \	1070	#define dREQ \
492	aio_req req; \	1071	aio_req req; \
		1072	int req_pri = next_pri; \
		1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
493	\	1074	\
494	if (SvOK (callback) && !SvROK (callback)) \	1075	if (SvOK (callback) && !SvROK (callback)) \
495	croak ("clalback must be undef or of reference type"); \	1076	croak ("callback must be undef or of reference type"); \
496	\	1077	\
497	Newz (0, req, 1, aio_cb); \	1078	Newz (0, req, 1, aio_cb); \
498	if (!req) \	1079	if (!req) \
499	croak ("out of memory during aio_req allocation"); \	1080	croak ("out of memory during aio_req allocation"); \
500	\	1081	\
501	req->callback = SvREFCNT_inc (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));
502		1090
503	MODULE = IO::AIO PACKAGE = IO::AIO	1091	MODULE = IO::AIO PACKAGE = IO::AIO
504		1092
505	PROTOTYPES: ENABLE	1093	PROTOTYPES: ENABLE
506		1094
507	BOOT:	1095	BOOT:
508	{	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
509	create_pipe ();	1102	create_pipe ();
510	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
511	}	1104	}
512		1105
513	void	1106	void
514	min_parallel(nthreads)	1107	min_parallel (nthreads)
515	int nthreads	1108	int nthreads
516	PROTOTYPE: $	1109	PROTOTYPE: $
517		1110
518	void	1111	void
519	max_parallel(nthreads)	1112	max_parallel (nthreads)
520	int nthreads	1113	int nthreads
521	PROTOTYPE: $	1114	PROTOTYPE: $
522		1115
523	int
524	max_outstanding(nreqs)
525	int nreqs
526	PROTOTYPE: $
527	CODE:
528	RETVAL = max_outstanding;
529	max_outstanding = nreqs;
530
531	void	1116	void
532	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
533	SV * pathname	1118	SV * pathname
534	int flags	1119	int flags
535	int mode	1120	int mode
536	SV * callback	1121	SV * callback
537	PROTOTYPE: $$$;$	1122	PROTOTYPE: $$$;$
538	CODE:	1123	PPCODE:
539	{	1124	{
540	dREQ;	1125	dREQ;
541		1126
542	req->type = REQ_OPEN;	1127	req->type = REQ_OPEN;
543	req->data = newSVsv (pathname);	1128	req->data = newSVsv (pathname);
544	req->dataptr = SvPVbyte_nolen (req->data);	1129	req->dataptr = SvPVbyte_nolen (req->data);
545	req->fd = flags;	1130	req->fd = flags;
546	req->mode = mode;	1131	req->mode = mode;
547		1132
548	send_req (req);	1133	REQ_SEND;
549	}	1134	}
550		1135
551	void	1136	void
552	aio_close(fh,callback=&PL_sv_undef)	1137	aio_close (fh,callback=&PL_sv_undef)
553	SV * fh	1138	SV * fh
554	SV * callback	1139	SV * callback
555	PROTOTYPE: $;$	1140	PROTOTYPE: $;$
556	ALIAS:	1141	ALIAS:
557	aio_close = REQ_CLOSE	1142	aio_close = REQ_CLOSE
558	aio_fsync = REQ_FSYNC	1143	aio_fsync = REQ_FSYNC
559	aio_fdatasync = REQ_FDATASYNC	1144	aio_fdatasync = REQ_FDATASYNC
560	CODE:	1145	PPCODE:
561	{	1146	{
562	dREQ;	1147	dREQ;
563		1148
564	req->type = ix;	1149	req->type = ix;
565	req->fh = newSVsv (fh);	1150	req->fh = newSVsv (fh);
566	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
567		1152
568	send_req (req);	1153	REQ_SEND (req);
569	}	1154	}
570		1155
571	void	1156	void
572	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
573	SV * fh	1158	SV * fh
574	UV offset	1159	UV offset
575	IV length	1160	UV length
576	SV * data	1161	SV * data
577	IV dataoffset	1162	UV dataoffset
578	SV * callback	1163	SV * callback
579	ALIAS:	1164	ALIAS:
580	aio_read = REQ_READ	1165	aio_read = REQ_READ
581	aio_write = REQ_WRITE	1166	aio_write = REQ_WRITE
582	PROTOTYPE: $$$$$;$	1167	PROTOTYPE: $$$$$;$
583	CODE:	1168	PPCODE:
584	{	1169	{
585	aio_req req;	1170	aio_req req;
586	STRLEN svlen;	1171	STRLEN svlen;
587	char *svptr = SvPVbyte (data, svlen);	1172	char *svptr = SvPVbyte (data, svlen);
588		1173
…		…
619	: IoOFP (sv_2io (fh)));	1204	: IoOFP (sv_2io (fh)));
620	req->offset = offset;	1205	req->offset = offset;
621	req->length = length;	1206	req->length = length;
622	req->data = SvREFCNT_inc (data);	1207	req->data = SvREFCNT_inc (data);
623	req->dataptr = (char *)svptr + dataoffset;	1208	req->dataptr = (char *)svptr + dataoffset;
624	req->callback = SvREFCNT_inc (callback);
625		1209
626	send_req (req);	1210	if (!SvREADONLY (data))
		1211	{
		1212	SvREADONLY_on (data);
		1213	req->data2ptr = (void *)data;
		1214	}
		1215
		1216	REQ_SEND;
627	}	1217	}
628	}	1218	}
629		1219
630	void	1220	void
		1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1222	SV * out_fh
		1223	SV * in_fh
		1224	UV in_offset
		1225	UV length
		1226	SV * callback
		1227	PROTOTYPE: $$$$;$
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->type = REQ_SENDFILE;
		1233	req->fh = newSVsv (out_fh);
		1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1235	req->fh2 = newSVsv (in_fh);
		1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1237	req->offset = in_offset;
		1238	req->length = length;
		1239
		1240	REQ_SEND;
		1241	}
		1242
		1243	void
631	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
632	SV * fh	1245	SV * fh
633	UV offset	1246	UV offset
634	IV length	1247	IV length
635	SV * callback	1248	SV * callback
636	PROTOTYPE: $$$;$	1249	PROTOTYPE: $$$;$
637	CODE:	1250	PPCODE:
638	{	1251	{
639	dREQ;	1252	dREQ;
640		1253
641	req->type = REQ_READAHEAD;	1254	req->type = REQ_READAHEAD;
642	req->fh = newSVsv (fh);	1255	req->fh = newSVsv (fh);
643	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
644	req->offset = offset;	1257	req->offset = offset;
645	req->length = length;	1258	req->length = length;
646		1259
647	send_req (req);	1260	REQ_SEND;
648	}	1261	}
649		1262
650	void	1263	void
651	aio_stat(fh_or_path,callback=&PL_sv_undef)	1264	aio_stat (fh_or_path,callback=&PL_sv_undef)
652	SV * fh_or_path	1265	SV * fh_or_path
653	SV * callback	1266	SV * callback
654	ALIAS:	1267	ALIAS:
655	aio_stat = REQ_STAT	1268	aio_stat = REQ_STAT
656	aio_lstat = REQ_LSTAT	1269	aio_lstat = REQ_LSTAT
657	CODE:	1270	PPCODE:
658	{	1271	{
659	dREQ;	1272	dREQ;
660		1273
661	New (0, req->statdata, 1, Stat_t);	1274	New (0, req->statdata, 1, Stat_t);
662	if (!req->statdata)	1275	if (!req->statdata)
		1276	{
		1277	req_free (req);
663	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1278	croak ("out of memory during aio_req->statdata allocation");
		1279	}
664		1280
665	if (SvPOK (fh_or_path))	1281	if (SvPOK (fh_or_path))
666	{	1282	{
667	req->type = ix;	1283	req->type = ix;
668	req->data = newSVsv (fh_or_path);	1284	req->data = newSVsv (fh_or_path);
…		…
673	req->type = REQ_FSTAT;	1289	req->type = REQ_FSTAT;
674	req->fh = newSVsv (fh_or_path);	1290	req->fh = newSVsv (fh_or_path);
675	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
676	}	1292	}
677		1293
678	send_req (req);	1294	REQ_SEND;
679	}	1295	}
680		1296
681	void	1297	void
682	aio_unlink(pathname,callback=&PL_sv_undef)	1298	aio_unlink (pathname,callback=&PL_sv_undef)
683	SV * pathname	1299	SV * pathname
684	SV * callback	1300	SV * callback
685	ALIAS:	1301	ALIAS:
686	aio_unlink = REQ_UNLINK	1302	aio_unlink = REQ_UNLINK
687	aio_rmdir = REQ_RMDIR	1303	aio_rmdir = REQ_RMDIR
		1304	aio_readdir = REQ_READDIR
688	CODE:	1305	PPCODE:
689	{	1306	{
690	dREQ;	1307	dREQ;
691		1308
692	req->type = ix;	1309	req->type = ix;
693	req->data = newSVsv (pathname);	1310	req->data = newSVsv (pathname);
694	req->dataptr = SvPVbyte_nolen (req->data);	1311	req->dataptr = SvPVbyte_nolen (req->data);
695		1312
696	send_req (req);	1313	REQ_SEND;
697	}	1314	}
698		1315
699	void	1316	void
700	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)
701	SV * oldpath	1318	SV * oldpath
702	SV * newpath	1319	SV * newpath
703	SV * callback	1320	SV * callback
		1321	ALIAS:
		1322	aio_link = REQ_LINK
		1323	aio_symlink = REQ_SYMLINK
		1324	aio_rename = REQ_RENAME
704	CODE:	1325	PPCODE:
705	{	1326	{
706	dREQ;	1327	dREQ;
707		1328
708	req->type = REQ_SYMLINK;	1329	req->type = ix;
709	req->fh = newSVsv (oldpath);	1330	req->fh = newSVsv (oldpath);
710	req->data2ptr = SvPVbyte_nolen (req->fh);	1331	req->data2ptr = SvPVbyte_nolen (req->fh);
711	req->data = newSVsv (newpath);	1332	req->data = newSVsv (newpath);
712	req->dataptr = SvPVbyte_nolen (req->data);	1333	req->dataptr = SvPVbyte_nolen (req->data);
713		1334
714	send_req (req);	1335	REQ_SEND;
715	}	1336	}
716		1337
717	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
718	flush()	1395	flush ()
719	PROTOTYPE:	1396	PROTOTYPE:
720	CODE:	1397	CODE:
721	while (nreqs)	1398	while (nreqs)
722	{	1399	{
723	poll_wait ();	1400	poll_wait ();
724	poll_cb ();	1401	poll_cb (0);
725	}	1402	}
726		1403
727	void	1404	void
728	poll()	1405	poll()
729	PROTOTYPE:	1406	PROTOTYPE:
730	CODE:	1407	CODE:
731	if (nreqs)	1408	if (nreqs)
732	{	1409	{
733	poll_wait ();	1410	poll_wait ();
734	poll_cb ();	1411	poll_cb (0);
735	}	1412	}
736		1413
737	int	1414	int
738	poll_fileno()	1415	poll_fileno()
739	PROTOTYPE:	1416	PROTOTYPE:
…		…
744		1421
745	int	1422	int
746	poll_cb(...)	1423	poll_cb(...)
747	PROTOTYPE:	1424	PROTOTYPE:
748	CODE:	1425	CODE:
749	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);
750	OUTPUT:	1435	OUTPUT:
751	RETVAL	1436	RETVAL
752		1437
753	void	1438	void
754	poll_wait()	1439	poll_wait()
…		…
763	CODE:	1448	CODE:
764	RETVAL = nreqs;	1449	RETVAL = nreqs;
765	OUTPUT:	1450	OUTPUT:
766	RETVAL	1451	RETVAL
767		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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