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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.83 by root, Sat Oct 28 00:17:30 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
		64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
28	#endif	75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
29		88
30	enum {	89	enum {
31	REQ_QUIT,	90	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		93	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	97	REQ_MKNOD, REQ_READDIR,
		98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
38	};	101	};
39		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
40	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
41	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
42		109
43	int type;	110	SV *data, *callback;
44		111	SV *fh, *fh2;
45	int fd;	112	void *dataptr, *data2ptr;
		113	Stat_t *statdata;
46	off_t offset;	114	off_t offset;
47	size_t length;	115	size_t length;
48	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
49	mode_t mode; /* open */	122	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		123
55	Stat_t *statdata;	124	unsigned char flags;
		125	unsigned char pri;
		126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56	} aio_cb;	129	} aio_cb;
57		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
58	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
59		137
60	static int started;	138	enum {
61	static volatile int nreqs;	139	PRI_MIN = -4,
62	static int max_outstanding = 1<<30;	140	PRI_MAX = 4,
		141
		142	DEFAULT_PRI = 0,
		143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		145	};
		146
		147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		148
		149	static unsigned int started, wanted;
		150
		151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		153	#else
		154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		155	#endif
		156
		157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		159
		160	/* worker threads management */
		161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		162
		163	typedef struct worker {
		164	/* locked by wrklock */
		165	struct worker *prev, *next;
		166
		167	pthread_t tid;
		168
		169	/* locked by reslock, reqlock or wrklock */
		170	aio_req req; /* currently processed request */
		171	void *dbuf;
		172	DIR *dirp;
		173	} worker;
		174
		175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		176
		177	static void worker_clear (worker *wrk)
		178	{
		179	if (wrk->dirp)
		180	{
		181	closedir (wrk->dirp);
		182	wrk->dirp = 0;
		183	}
		184
		185	if (wrk->dbuf)
		186	{
		187	free (wrk->dbuf);
		188	wrk->dbuf = 0;
		189	}
		190	}
		191
		192	static void worker_free (worker *wrk)
		193	{
		194	wrk->next->prev = wrk->prev;
		195	wrk->prev->next = wrk->next;
		196
		197	free (wrk);
		198	}
		199
		200	static volatile unsigned int nreqs, nready, npending;
		201	static volatile unsigned int max_outstanding = 0xffffffff;
63	static int respipe [2];	202	static int respipe [2];
64		203
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	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;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		207
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
71	static volatile aio_req ress, rese; /* queue start, queue end */
72		209
73	static void	210	static unsigned int get_nready ()
74	poll_wait ()
75	{	211	{
76	if (nreqs && !ress)	212	unsigned int retval;
		213
		214	LOCK (reqlock);
		215	retval = nready;
		216	UNLOCK (reqlock);
		217
		218	return retval;
		219	}
		220
		221	static unsigned int get_npending ()
		222	{
		223	unsigned int retval;
		224
		225	LOCK (reslock);
		226	retval = npending;
		227	UNLOCK (reslock);
		228
		229	return retval;
		230	}
		231
		232	#else
		233
		234	# define get_nready() nready
		235	# define get_npending() npending
		236
		237	#endif
		238
		239	/*
		240	* a somewhat faster data structure might be nice, but
		241	* with 8 priorities this actually needs <20 insns
		242	* per shift, the most expensive operation.
		243	*/
		244	typedef struct {
		245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		246	int size;
		247	} reqq;
		248
		249	static reqq req_queue;
		250	static reqq res_queue;
		251
		252	int reqq_push (reqq *q, aio_req req)
		253	{
		254	int pri = req->pri;
		255	req->next = 0;
		256
		257	if (q->qe[pri])
		258	{
		259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
77	{	261	}
		262	else
		263	q->qe[pri] = q->qs[pri] = req;
		264
		265	return q->size++;
		266	}
		267
		268	aio_req reqq_shift (reqq *q)
		269	{
		270	int pri;
		271
		272	if (!q->size)
		273	return 0;
		274
		275	--q->size;
		276
		277	for (pri = NUM_PRI; pri--; )
		278	{
		279	aio_req req = q->qs[pri];
		280
		281	if (req)
		282	{
		283	if (!(q->qs[pri] = req->next))
		284	q->qe[pri] = 0;
		285
		286	return req;
		287	}
		288	}
		289
		290	abort ();
		291	}
		292
		293	static int poll_cb (int max);
		294	static void req_invoke (aio_req req);
		295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
		297
		298	/* must be called at most once */
		299	static SV *req_sv (aio_req req, const char *klass)
		300	{
		301	if (!req->self)
		302	{
		303	req->self = (SV *)newHV ();
		304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
		306
		307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		308	}
		309
		310	static aio_req SvAIO_REQ (SV *sv)
		311	{
		312	MAGIC *mg;
		313
		314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		315	croak ("object of class " AIO_REQ_KLASS " expected");
		316
		317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		318
		319	return mg ? (aio_req)mg->mg_ptr : 0;
		320	}
		321
		322	static void aio_grp_feed (aio_req grp)
		323	{
		324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		325	{
		326	int old_len = grp->length;
		327
		328	if (grp->fh2 && SvOK (grp->fh2))
		329	{
		330	dSP;
		331
		332	ENTER;
		333	SAVETMPS;
		334	PUSHMARK (SP);
		335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		336	PUTBACK;
		337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		338	SPAGAIN;
		339	FREETMPS;
		340	LEAVE;
		341	}
		342
		343	/* stop if no progress has been made */
		344	if (old_len == grp->length)
		345	{
		346	SvREFCNT_dec (grp->fh2);
		347	grp->fh2 = 0;
		348	break;
		349	}
		350	}
		351	}
		352
		353	static void aio_grp_dec (aio_req grp)
		354	{
		355	--grp->length;
		356
		357	/* call feeder, if applicable */
		358	aio_grp_feed (grp);
		359
		360	/* finish, if done */
		361	if (!grp->length && grp->fd)
		362	{
		363	req_invoke (grp);
		364	req_free (grp);
		365	}
		366	}
		367
		368	static void req_invoke (aio_req req)
		369	{
		370	dSP;
		371
		372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		373	{
		374	ENTER;
		375	SAVETMPS;
		376	PUSHMARK (SP);
		377	EXTEND (SP, 1);
		378
		379	switch (req->type)
		380	{
		381	case REQ_READDIR:
		382	{
		383	SV *rv = &PL_sv_undef;
		384
		385	if (req->result >= 0)
		386	{
		387	int i;
		388	char *buf = req->data2ptr;
		389	AV *av = newAV ();
		390
		391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
		394	{
		395	SV *sv = newSVpv (buf, 0);
		396
		397	av_store (av, i, sv);
		398	buf += SvCUR (sv) + 1;
		399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
		402	}
		403
		404	PUSHs (rv);
		405	}
		406	break;
		407
		408	case REQ_OPEN:
		409	{
		410	/* convert fd to fh */
		411	SV *fh;
		412
		413	PUSHs (sv_2mortal (newSViv (req->result)));
		414	PUTBACK;
		415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		416	SPAGAIN;
		417
		418	fh = SvREFCNT_inc (POPs);
		419
		420	PUSHMARK (SP);
		421	XPUSHs (sv_2mortal (fh));
		422	}
		423	break;
		424
		425	case REQ_GROUP:
		426	req->fd = 2; /* mark group as finished */
		427
		428	if (req->data)
		429	{
		430	int i;
		431	AV *av = (AV *)req->data;
		432
		433	EXTEND (SP, AvFILL (av) + 1);
		434	for (i = 0; i <= AvFILL (av); ++i)
		435	PUSHs (*av_fetch (av, i, 0));
		436	}
		437	break;
		438
		439	case REQ_NOP:
		440	case REQ_BUSY:
		441	break;
		442
		443	default:
		444	PUSHs (sv_2mortal (newSViv (req->result)));
		445	break;
		446	}
		447
		448	errno = req->errorno;
		449
		450	PUTBACK;
		451	call_sv (req->callback, G_VOID | G_EVAL);
		452	SPAGAIN;
		453
		454	FREETMPS;
		455	LEAVE;
		456	}
		457
		458	if (req->grp)
		459	{
		460	aio_req grp = req->grp;
		461
		462	/* unlink request */
		463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		465
		466	if (grp->grp_first == req)
		467	grp->grp_first = req->grp_next;
		468
		469	aio_grp_dec (grp);
		470	}
		471
		472	if (SvTRUE (ERRSV))
		473	{
		474	req_free (req);
		475	croak (0);
		476	}
		477	}
		478
		479	static void req_free (aio_req req)
		480	{
		481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
		487	SvREFCNT_dec (req->data);
		488	SvREFCNT_dec (req->fh);
		489	SvREFCNT_dec (req->fh2);
		490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
		492
		493	if (req->type == REQ_READDIR)
		494	free (req->data2ptr);
		495
		496	Safefree (req);
		497	}
		498
		499	static void req_cancel_subs (aio_req grp)
		500	{
		501	aio_req sub;
		502
		503	if (grp->type != REQ_GROUP)
		504	return;
		505
		506	SvREFCNT_dec (grp->fh2);
		507	grp->fh2 = 0;
		508
		509	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		510	req_cancel (sub);
		511	}
		512
		513	static void req_cancel (aio_req req)
		514	{
		515	req->flags |= FLAG_CANCELLED;
		516
		517	req_cancel_subs (req);
		518	}
		519
		520	static void *aio_proc(void *arg);
		521
		522	static void start_thread (void)
		523	{
		524	sigset_t fullsigset, oldsigset;
		525	pthread_attr_t attr;
		526
		527	worker *wrk = calloc (1, sizeof (worker));
		528
		529	if (!wrk)
		530	croak ("unable to allocate worker thread data");
		531
		532	pthread_attr_init (&attr);
		533	pthread_attr_setstacksize (&attr, STACKSIZE);
		534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
		538
		539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
		542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		543
		544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		545	{
		546	wrk->prev = &wrk_first;
		547	wrk->next = wrk_first.next;
		548	wrk_first.next->prev = wrk;
		549	wrk_first.next = wrk;
		550	++started;
		551	}
		552	else
		553	free (wrk);
		554
		555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
		557	}
		558
		559	static void maybe_start_thread ()
		560	{
		561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
		565
		566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
		571
		572	#if 0
		573	gettimeofday (&now, 0);
		574
		575	diff.tv_sec = now.tv_sec - last.tv_sec;
		576	diff.tv_usec = now.tv_usec - last.tv_usec;
		577
		578	if (diff.tv_usec < 0)
		579	{
		580	--diff.tv_sec;
		581	diff.tv_usec += 1000000;
		582	}
		583
		584	if (!diff.tv_sec && diff.tv_usec < 10000)
		585	return;
		586
		587	last = now;
		588	#endif
		589
		590	start_thread ();
		591	}
		592
		593	static void req_send (aio_req req)
		594	{
		595	++nreqs;
		596
		597	LOCK (reqlock);
		598	++nready;
		599	reqq_push (&req_queue, req);
		600	pthread_cond_signal (&reqwait);
		601	UNLOCK (reqlock);
		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	LOCK (reqlock);
		616	reqq_push (&req_queue, req);
		617	pthread_cond_signal (&reqwait);
		618	UNLOCK (reqlock);
		619
		620	LOCK (wrklock);
		621	--started;
		622	UNLOCK (wrklock);
		623	}
		624
		625	static void min_parallel (int nthreads)
		626	{
		627	if (wanted < nthreads)
		628	wanted = nthreads;
		629	}
		630
		631	static void max_parallel (int nthreads)
		632	{
		633	if (wanted > nthreads)
		634	wanted = nthreads;
		635
		636	while (started > wanted)
		637	end_thread ();
		638	}
		639
		640	static void poll_wait ()
		641	{
78	fd_set rfd;	642	fd_set rfd;
		643
		644	while (nreqs)
		645	{
		646	int size;
		647	if (WORDREAD_UNSAFE) LOCK (reslock);
		648	size = res_queue.size;
		649	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		650
		651	if (size)
		652	return;
		653
		654	maybe_start_thread ();
		655
79	FD_ZERO(&rfd);	656	FD_ZERO(&rfd);
80	FD_SET(respipe [0], &rfd);	657	FD_SET(respipe [0], &rfd);
81		658
82	select (respipe [0] + 1, &rfd, 0, 0, 0);	659	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	660	}
84	}	661	}
85		662
86	static int	663	static int poll_cb (int max)
87	poll_cb ()
88	{	664	{
89	dSP;	665	dSP;
90	int count = 0;	666	int count = 0;
91	int do_croak = 0;	667	int do_croak = 0;
92	aio_req req, prv;	668	aio_req req;
93		669
94	pthread_mutex_lock (&reslock);	670	for (;;)
95
96	{	671	{
97	/* read any signals sent by the worker threads */	672	while (max <= 0 || count < max)
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{
110	nreqs--;
111
112	if (req->type == REQ_QUIT)
113	started--;
114	else
115	{	673	{
116	int errorno = errno;	674	maybe_start_thread ();
117	errno = req->errorno;
118		675
119	if (req->type == REQ_READ)	676	LOCK (reslock);
120	SvCUR_set (req->data, req->dataoffset	677	req = reqq_shift (&res_queue);
121	+ req->result > 0 ? req->result : 0);
122		678
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)	679	if (req)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	680	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	681	--npending;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		682
135	Safefree (req->statdata);	683	if (!res_queue.size)
		684	{
		685	/* read any signals sent by the worker threads */
		686	char buf [32];
		687	while (read (respipe [0], buf, 32) == 32)
		688	;
		689	}
136	}	690	}
137		691
138	ENTER;	692	UNLOCK (reslock);
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141		693
		694	if (!req)
		695	break;
		696
		697	--nreqs;
		698
142	if (req->type == REQ_OPEN)	699	if (req->type == REQ_GROUP && req->length)
143	{	700	{
144	/* convert fd to fh */	701	req->fd = 1; /* mark request as delayed */
145	SV *fh;	702	continue;
146
147	PUTBACK;
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149	SPAGAIN;
150
151	fh = SvREFCNT_inc (POPs);
152
153	PUSHMARK (SP);
154	XPUSHs (sv_2mortal (fh));
155	}	703	}
156		704	else
157	if (SvOK (req->callback))
158	{	705	{
159	PUTBACK;	706	if (req->type == REQ_READ)
160	call_sv (req->callback, G_VOID | G_EVAL);	707	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
161	SPAGAIN;	708
		709	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		710	SvREADONLY_off (req->data);
		711
		712	if (req->statdata)
		713	{
		714	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		715	PL_laststatval = req->result;
		716	PL_statcache = *(req->statdata);
		717	}
		718
		719	req_invoke (req);
		720
		721	count++;
162	}	722	}
163		723
164	do_croak = SvTRUE (ERRSV);	724	req_free (req);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}	725	}
174		726
175	prv = req;	727	if (nreqs <= max_outstanding)
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);	728	break;
		729
		730	poll_wait ();
		731
		732	max = 0;
181	}	733	}
182		734
183	return count;	735	return count;
184	}	736	}
185		737
186	static void *aio_proc(void *arg);	738	static void create_pipe ()
187
188	static void
189	start_thread (void)
190	{	739	{
191	sigset_t fullsigset, oldsigset;	740	if (pipe (respipe))
192	pthread_t tid;	741	croak ("unable to initialize result pipe");
193	pthread_attr_t attr;
194		742
195	pthread_attr_init (&attr);	743	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
196	pthread_attr_setstacksize (&attr, STACKSIZE);	744	croak ("cannot set result pipe to nonblocking mode");
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198		745
199	sigfillset (&fullsigset);	746	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	747	croak ("cannot set result pipe to nonblocking mode");
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	pthread_mutex_lock (&frklock);
273
274	fork_started = started;
275
276	for (;;) {
277	while (nreqs)
278	{
279	poll_wait ();
280	poll_cb ();
281	}
282
283	max_parallel (0);
284
285	pthread_mutex_lock (&reqlock);
286
287	if (!nreqs && !started)
288	break;
289
290	pthread_mutex_unlock (&reqlock);
291
292	min_parallel (fork_started);
293	}
294
295	pthread_mutex_lock (&reslock);
296
297	assert (!started);
298	assert (!nreqs);
299	assert (!reqs && !reqe);
300	assert (!ress && !rese);
301	}
302
303	static void atfork_parent (void)
304	{
305	pthread_mutex_unlock (&reslock);
306	min_parallel (fork_started);
307	pthread_mutex_unlock (&reqlock);
308	pthread_mutex_unlock (&frklock);
309	}
310
311	static void atfork_child (void)
312	{
313	reqs = reqe = 0;
314
315	atfork_parent ();
316	}	748	}
317		749
318	/*****************************************************************************/	750	/*****************************************************************************/
319	/* work around various missing functions */	751	/* work around various missing functions */
320		752
…		…
325	/*	757	/*
326	* make our pread/pwrite safe against themselves, but not against	758	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,	759	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.	760	* but that's your problem, not mine.
329	*/	761	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	762	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
331		763
332	static ssize_t	764	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
333	pread (int fd, void *buf, size_t count, off_t offset)
334	{	765	{
335	ssize_t res;	766	ssize_t res;
336	off_t ooffset;	767	off_t ooffset;
337		768
338	pthread_mutex_lock (&iolock);	769	LOCK (preadwritelock);
339	ooffset = lseek (fd, 0, SEEK_CUR);	770	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);	771	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);	772	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);	773	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);	774	UNLOCK (preadwritelock);
344		775
345	return res;	776	return res;
346	}	777	}
347		778
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)	779	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
350	{	780	{
351	ssize_t res;	781	ssize_t res;
352	off_t ooffset;	782	off_t ooffset;
353		783
354	pthread_mutex_lock (&iolock);	784	LOCK (preadwritelock);
355	ooffset = lseek (fd, 0, SEEK_CUR);	785	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);	786	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);	787	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);	788	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);	789	UNLOCK (preadwritelock);
360		790
361	return res;	791	return res;
362	}	792	}
363	#endif	793	#endif
364		794
365	#if !HAVE_FDATASYNC	795	#if !HAVE_FDATASYNC
366	# define fdatasync fsync	796	# define fdatasync fsync
367	#endif	797	#endif
368		798
369	#if !HAVE_READAHEAD	799	#if !HAVE_READAHEAD
370	# define readahead aio_readahead	800	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
371		801
372	static char readahead_buf[4096];	802	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
373
374	static ssize_t
375	readahead (int fd, off_t offset, size_t count)
376	{	803	{
		804	dBUF;
		805
377	while (count > 0)	806	while (count > 0)
378	{	807	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	808	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
380		809
381	pread (fd, readahead_buf, len, offset);	810	pread (fd, aio_buf, len, offset);
382	offset += len;	811	offset += len;
383	count -= len;	812	count -= len;
384	}	813	}
385		814
386	errno = 0;	815	errno = 0;
387	}	816	}
		817
		818	#endif
		819
		820	#if !HAVE_READDIR_R
		821	# define readdir_r aio_readdir_r
		822
		823	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		824
		825	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		826	{
		827	struct dirent *e;
		828	int errorno;
		829
		830	LOCK (readdirlock);
		831
		832	e = readdir (dirp);
		833	errorno = errno;
		834
		835	if (e)
		836	{
		837	*res = ent;
		838	strcpy (ent->d_name, e->d_name);
		839	}
		840	else
		841	*res = 0;
		842
		843	UNLOCK (readdirlock);
		844
		845	errno = errorno;
		846	return e ? 0 : -1;
		847	}
		848	#endif
		849
		850	/* sendfile always needs emulation */
		851	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		852	{
		853	ssize_t res;
		854
		855	if (!count)
		856	return 0;
		857
		858	#if HAVE_SENDFILE
		859	# if __linux
		860	res = sendfile (ofd, ifd, &offset, count);
		861
		862	# elif __freebsd
		863	/*
		864	* Of course, the freebsd sendfile is a dire hack with no thoughts
		865	* wasted on making it similar to other I/O functions.
		866	*/
		867	{
		868	off_t sbytes;
		869	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		870
		871	if (res < 0 && sbytes)
		872	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		873	res = sbytes;
		874	}
		875
		876	# elif __hpux
		877	res = sendfile (ofd, ifd, offset, count, 0, 0);
		878
		879	# elif __solaris
		880	{
		881	struct sendfilevec vec;
		882	size_t sbytes;
		883
		884	vec.sfv_fd = ifd;
		885	vec.sfv_flag = 0;
		886	vec.sfv_off = offset;
		887	vec.sfv_len = count;
		888
		889	res = sendfilev (ofd, &vec, 1, &sbytes);
		890
		891	if (res < 0 && sbytes)
		892	res = sbytes;
		893	}
		894
388	#endif	895	# endif
		896	#else
		897	res = -1;
		898	errno = ENOSYS;
		899	#endif
		900
		901	if (res < 0
		902	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		903	#if __solaris
		904	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		905	#endif
		906	)
		907	)
		908	{
		909	/* emulate sendfile. this is a major pain in the ass */
		910	dBUF;
		911
		912	res = 0;
		913
		914	while (count)
		915	{
		916	ssize_t cnt;
		917
		918	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		919
		920	if (cnt <= 0)
		921	{
		922	if (cnt && !res) res = -1;
		923	break;
		924	}
		925
		926	cnt = write (ofd, aio_buf, cnt);
		927
		928	if (cnt <= 0)
		929	{
		930	if (cnt && !res) res = -1;
		931	break;
		932	}
		933
		934	offset += cnt;
		935	res += cnt;
		936	count -= cnt;
		937	}
		938	}
		939
		940	return res;
		941	}
		942
		943	/* read a full directory */
		944	static void scandir_ (aio_req req, worker *self)
		945	{
		946	DIR *dirp;
		947	union
		948	{
		949	struct dirent d;
		950	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		951	} *u;
		952	struct dirent *entp;
		953	char *name, *names;
		954	int memlen = 4096;
		955	int memofs = 0;
		956	int res = 0;
		957	int errorno;
		958
		959	LOCK (wrklock);
		960	self->dirp = dirp = opendir (req->dataptr);
		961	self->dbuf = u = malloc (sizeof (*u));
		962	req->data2ptr = names = malloc (memlen);
		963	UNLOCK (wrklock);
		964
		965	if (dirp && u && names)
		966	for (;;)
		967	{
		968	errno = 0;
		969	readdir_r (dirp, &u->d, &entp);
		970
		971	if (!entp)
		972	break;
		973
		974	name = entp->d_name;
		975
		976	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		977	{
		978	int len = strlen (name) + 1;
		979
		980	res++;
		981
		982	while (memofs + len > memlen)
		983	{
		984	memlen *= 2;
		985	LOCK (wrklock);
		986	req->data2ptr = names = realloc (names, memlen);
		987	UNLOCK (wrklock);
		988
		989	if (!names)
		990	break;
		991	}
		992
		993	memcpy (names + memofs, name, len);
		994	memofs += len;
		995	}
		996	}
		997
		998	if (errno)
		999	res = -1;
		1000
		1001	req->result = res;
		1002	}
389		1003
390	/*****************************************************************************/	1004	/*****************************************************************************/
391		1005
392	static void *
393	aio_proc (void *thr_arg)	1006	static void *aio_proc (void *thr_arg)
394	{	1007	{
395	aio_req req;	1008	aio_req req;
396	int type;	1009	worker *self = (worker *)thr_arg;
397		1010
398	do	1011	for (;;)
399	{	1012	{
400	pthread_mutex_lock (&reqlock);	1013	LOCK (reqlock);
401		1014
402	for (;;)	1015	for (;;)
403	{	1016	{
404	req = reqs;	1017	self->req = req = reqq_shift (&req_queue);
405
406	if (reqs)
407	{
408	reqs = reqs->next;
409	if (!reqs) reqe = 0;
410	}
411		1018
412	if (req)	1019	if (req)
413	break;	1020	break;
414		1021
415	pthread_cond_wait (&reqwait, &reqlock);	1022	pthread_cond_wait (&reqwait, &reqlock);
416	}	1023	}
417		1024
418	pthread_mutex_unlock (&reqlock);	1025	--nready;
		1026
		1027	UNLOCK (reqlock);
419		1028
420	errno = 0; /* strictly unnecessary */	1029	errno = 0; /* strictly unnecessary */
421		1030
422	type = req->type;	1031	if (!(req->flags & FLAG_CANCELLED))
423
424	switch (type)	1032	switch (req->type)
425	{	1033	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1034	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1035	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428		1036
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1037	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		1038	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
430		1039
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1040	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1041	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1042	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434		1043
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1044	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;	1045	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1046	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1047	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1048	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1049	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1050	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1051	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
440		1052
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1053	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;	1054	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1055	case REQ_READDIR: scandir_ (req, self); break;
443		1056
		1057	case REQ_BUSY:
		1058	{
		1059	struct timeval tv;
		1060
		1061	tv.tv_sec = req->fd;
		1062	tv.tv_usec = req->fd2;
		1063
		1064	req->result = select (0, 0, 0, 0, &tv);
		1065	}
		1066
		1067	case REQ_GROUP:
		1068	case REQ_NOP:
		1069	break;
		1070
444	case REQ_QUIT:	1071	case REQ_QUIT:
445	break;	1072	LOCK (wrklock);
		1073	worker_free (self);
		1074	--started;
		1075	UNLOCK (wrklock);
		1076	return 0;
446		1077
447	default:	1078	default:
448	req->result = ENOSYS;	1079	req->result = ENOSYS;
449	break;	1080	break;
450	}	1081	}
451		1082
452	req->errorno = errno;	1083	req->errorno = errno;
453		1084
454	pthread_mutex_lock (&reslock);	1085	LOCK (reslock);
455		1086
456	req->next = 0;	1087	++npending;
457		1088
458	if (rese)	1089	if (!reqq_push (&res_queue, req))
459	{
460	rese->next = req;
461	rese = req;
462	}
463	else
464	{
465	rese = ress = req;
466
467	/* write a dummy byte to the pipe so fh becomes ready */	1090	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);	1091	write (respipe [1], &respipe, 1);
469	}
470		1092
471	pthread_mutex_unlock (&reslock);	1093	self->req = 0;
		1094	worker_clear (self);
		1095
		1096	UNLOCK (reslock);
		1097	}
		1098	}
		1099
		1100	/*****************************************************************************/
		1101
		1102	static void atfork_prepare (void)
		1103	{
		1104	LOCK (wrklock);
		1105	LOCK (reqlock);
		1106	LOCK (reslock);
		1107	#if !HAVE_PREADWRITE
		1108	LOCK (preadwritelock);
		1109	#endif
		1110	#if !HAVE_READDIR_R
		1111	LOCK (readdirlock);
		1112	#endif
		1113	}
		1114
		1115	static void atfork_parent (void)
		1116	{
		1117	#if !HAVE_READDIR_R
		1118	UNLOCK (readdirlock);
		1119	#endif
		1120	#if !HAVE_PREADWRITE
		1121	UNLOCK (preadwritelock);
		1122	#endif
		1123	UNLOCK (reslock);
		1124	UNLOCK (reqlock);
		1125	UNLOCK (wrklock);
		1126	}
		1127
		1128	static void atfork_child (void)
		1129	{
		1130	aio_req prv;
		1131
		1132	while (prv = reqq_shift (&req_queue))
		1133	req_free (prv);
		1134
		1135	while (prv = reqq_shift (&res_queue))
		1136	req_free (prv);
		1137
		1138	while (wrk_first.next != &wrk_first)
472	}	1139	{
473	while (type != REQ_QUIT);	1140	worker *wrk = wrk_first.next;
474		1141
475	return 0;	1142	if (wrk->req)
		1143	req_free (wrk->req);
		1144
		1145	worker_clear (wrk);
		1146	worker_free (wrk);
		1147	}
		1148
		1149	started = 0;
		1150	nreqs = 0;
		1151
		1152	close (respipe [0]);
		1153	close (respipe [1]);
		1154	create_pipe ();
		1155
		1156	atfork_parent ();
476	}	1157	}
477		1158
478	#define dREQ \	1159	#define dREQ \
479	aio_req req; \	1160	aio_req req; \
		1161	int req_pri = next_pri; \
		1162	next_pri = DEFAULT_PRI + PRI_BIAS; \
480	\	1163	\
481	if (SvOK (callback) && !SvROK (callback)) \	1164	if (SvOK (callback) && !SvROK (callback)) \
482	croak ("clalback must be undef or of reference type"); \	1165	croak ("callback must be undef or of reference type"); \
483	\	1166	\
484	Newz (0, req, 1, aio_cb); \	1167	Newz (0, req, 1, aio_cb); \
485	if (!req) \	1168	if (!req) \
486	croak ("out of memory during aio_req allocation"); \	1169	croak ("out of memory during aio_req allocation"); \
487	\	1170	\
488	req->callback = SvREFCNT_inc (callback);	1171	req->callback = newSVsv (callback); \
		1172	req->pri = req_pri
		1173
		1174	#define REQ_SEND \
		1175	req_send (req); \
		1176	\
		1177	if (GIMME_V != G_VOID) \
		1178	XPUSHs (req_sv (req, AIO_REQ_KLASS));
489		1179
490	MODULE = IO::AIO PACKAGE = IO::AIO	1180	MODULE = IO::AIO PACKAGE = IO::AIO
491		1181
492	PROTOTYPES: ENABLE	1182	PROTOTYPES: ENABLE
493		1183
494	BOOT:	1184	BOOT:
495	{	1185	{
496	if (pipe (respipe))	1186	HV *stash = gv_stashpv ("IO::AIO", 1);
497	croak ("unable to initialize result pipe");
498		1187
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1188	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
500	croak ("cannot set result pipe to nonblocking mode");	1189	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1190	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1191	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1192	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1193	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
501		1194
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1195	create_pipe ();
503	croak ("cannot set result pipe to nonblocking mode");
504
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1196	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
506	}
507		1197
		1198	start_thread ();
		1199	}
		1200
508	void	1201	void
509	min_parallel(nthreads)	1202	min_parallel (int nthreads)
510	int nthreads
511	PROTOTYPE: $	1203	PROTOTYPE: $
512		1204
513	void	1205	void
514	max_parallel(nthreads)	1206	max_parallel (int nthreads)
515	int nthreads
516	PROTOTYPE: $	1207	PROTOTYPE: $
517		1208
518	int	1209	int
519	max_outstanding(nreqs)	1210	max_outstanding (int maxreqs)
520	int nreqs	1211	PROTOTYPE: $
521	PROTOTYPE: $
522	CODE:	1212	CODE:
523	RETVAL = max_outstanding;	1213	RETVAL = max_outstanding;
524	max_outstanding = nreqs;	1214	max_outstanding = maxreqs;
		1215	OUTPUT:
		1216	RETVAL
525		1217
526	void	1218	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1219	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
528	SV * pathname	1220	SV * pathname
529	int flags	1221	int flags
530	int mode	1222	int mode
531	SV * callback	1223	SV * callback
532	PROTOTYPE: $$$;$	1224	PROTOTYPE: $$$;$
533	CODE:	1225	PPCODE:
534	{	1226	{
535	dREQ;	1227	dREQ;
536		1228
537	req->type = REQ_OPEN;	1229	req->type = REQ_OPEN;
538	req->data = newSVsv (pathname);	1230	req->data = newSVsv (pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);	1231	req->dataptr = SvPVbyte_nolen (req->data);
540	req->fd = flags;	1232	req->fd = flags;
541	req->mode = mode;	1233	req->mode = mode;
542		1234
543	send_req (req);	1235	REQ_SEND;
544	}	1236	}
545		1237
546	void	1238	void
547	aio_close(fh,callback=&PL_sv_undef)	1239	aio_close (fh,callback=&PL_sv_undef)
548	SV * fh	1240	SV * fh
549	SV * callback	1241	SV * callback
550	PROTOTYPE: $;$	1242	PROTOTYPE: $;$
551	ALIAS:	1243	ALIAS:
552	aio_close = REQ_CLOSE	1244	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	1245	aio_fsync = REQ_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	1246	aio_fdatasync = REQ_FDATASYNC
555	CODE:	1247	PPCODE:
556	{	1248	{
557	dREQ;	1249	dREQ;
558		1250
559	req->type = ix;	1251	req->type = ix;
560	req->fh = newSVsv (fh);	1252	req->fh = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1253	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
562		1254
563	send_req (req);	1255	REQ_SEND (req);
564	}	1256	}
565		1257
566	void	1258	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1259	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
568	SV * fh	1260	SV * fh
569	UV offset	1261	UV offset
570	IV length	1262	UV length
571	SV * data	1263	SV * data
572	IV dataoffset	1264	UV dataoffset
573	SV * callback	1265	SV * callback
574	ALIAS:	1266	ALIAS:
575	aio_read = REQ_READ	1267	aio_read = REQ_READ
576	aio_write = REQ_WRITE	1268	aio_write = REQ_WRITE
577	PROTOTYPE: $$$$$;$	1269	PROTOTYPE: $$$$$;$
578	CODE:	1270	PPCODE:
579	{	1271	{
580	aio_req req;	1272	aio_req req;
581	STRLEN svlen;	1273	STRLEN svlen;
582	char *svptr = SvPVbyte (data, svlen);	1274	char *svptr = SvPVbyte (data, svlen);
583		1275
…		…
614	: IoOFP (sv_2io (fh)));	1306	: IoOFP (sv_2io (fh)));
615	req->offset = offset;	1307	req->offset = offset;
616	req->length = length;	1308	req->length = length;
617	req->data = SvREFCNT_inc (data);	1309	req->data = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	1310	req->dataptr = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);
620		1311
621	send_req (req);	1312	if (!SvREADONLY (data))
		1313	{
		1314	SvREADONLY_on (data);
		1315	req->data2ptr = (void *)data;
		1316	}
		1317
		1318	REQ_SEND;
622	}	1319	}
623	}	1320	}
624		1321
625	void	1322	void
		1323	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1324	SV * out_fh
		1325	SV * in_fh
		1326	UV in_offset
		1327	UV length
		1328	SV * callback
		1329	PROTOTYPE: $$$$;$
		1330	PPCODE:
		1331	{
		1332	dREQ;
		1333
		1334	req->type = REQ_SENDFILE;
		1335	req->fh = newSVsv (out_fh);
		1336	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1337	req->fh2 = newSVsv (in_fh);
		1338	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1339	req->offset = in_offset;
		1340	req->length = length;
		1341
		1342	REQ_SEND;
		1343	}
		1344
		1345	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1346	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
627	SV * fh	1347	SV * fh
628	UV offset	1348	UV offset
629	IV length	1349	IV length
630	SV * callback	1350	SV * callback
631	PROTOTYPE: $$$;$	1351	PROTOTYPE: $$$;$
632	CODE:	1352	PPCODE:
633	{	1353	{
634	dREQ;	1354	dREQ;
635		1355
636	req->type = REQ_READAHEAD;	1356	req->type = REQ_READAHEAD;
637	req->fh = newSVsv (fh);	1357	req->fh = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1358	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
639	req->offset = offset;	1359	req->offset = offset;
640	req->length = length;	1360	req->length = length;
641		1361
642	send_req (req);	1362	REQ_SEND;
643	}	1363	}
644		1364
645	void	1365	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)	1366	aio_stat (fh_or_path,callback=&PL_sv_undef)
647	SV * fh_or_path	1367	SV * fh_or_path
648	SV * callback	1368	SV * callback
649	ALIAS:	1369	ALIAS:
650	aio_stat = REQ_STAT	1370	aio_stat = REQ_STAT
651	aio_lstat = REQ_LSTAT	1371	aio_lstat = REQ_LSTAT
652	CODE:	1372	PPCODE:
653	{	1373	{
654	dREQ;	1374	dREQ;
655		1375
656	New (0, req->statdata, 1, Stat_t);	1376	New (0, req->statdata, 1, Stat_t);
657	if (!req->statdata)	1377	if (!req->statdata)
		1378	{
		1379	req_free (req);
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1380	croak ("out of memory during aio_req->statdata allocation");
		1381	}
659		1382
660	if (SvPOK (fh_or_path))	1383	if (SvPOK (fh_or_path))
661	{	1384	{
662	req->type = ix;	1385	req->type = ix;
663	req->data = newSVsv (fh_or_path);	1386	req->data = newSVsv (fh_or_path);
…		…
668	req->type = REQ_FSTAT;	1391	req->type = REQ_FSTAT;
669	req->fh = newSVsv (fh_or_path);	1392	req->fh = newSVsv (fh_or_path);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1393	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
671	}	1394	}
672		1395
673	send_req (req);	1396	REQ_SEND;
674	}	1397	}
675		1398
676	void	1399	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	1400	aio_unlink (pathname,callback=&PL_sv_undef)
678	SV * pathname	1401	SV * pathname
679	SV * callback	1402	SV * callback
680	ALIAS:	1403	ALIAS:
681	aio_unlink = REQ_UNLINK	1404	aio_unlink = REQ_UNLINK
682	aio_rmdir = REQ_RMDIR	1405	aio_rmdir = REQ_RMDIR
		1406	aio_readdir = REQ_READDIR
683	CODE:	1407	PPCODE:
684	{	1408	{
685	dREQ;	1409	dREQ;
686		1410
687	req->type = ix;	1411	req->type = ix;
688	req->data = newSVsv (pathname);	1412	req->data = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	1413	req->dataptr = SvPVbyte_nolen (req->data);
690		1414
691	send_req (req);	1415	REQ_SEND;
692	}	1416	}
693		1417
694	void	1418	void
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1419	aio_link (oldpath,newpath,callback=&PL_sv_undef)
696	SV * oldpath	1420	SV * oldpath
697	SV * newpath	1421	SV * newpath
698	SV * callback	1422	SV * callback
		1423	ALIAS:
		1424	aio_link = REQ_LINK
		1425	aio_symlink = REQ_SYMLINK
		1426	aio_rename = REQ_RENAME
699	CODE:	1427	PPCODE:
700	{	1428	{
701	dREQ;	1429	dREQ;
702		1430
703	req->type = REQ_SYMLINK;	1431	req->type = ix;
704	req->fh = newSVsv (oldpath);	1432	req->fh = newSVsv (oldpath);
705	req->data2ptr = SvPVbyte_nolen (req->fh);	1433	req->data2ptr = SvPVbyte_nolen (req->fh);
706	req->data = newSVsv (newpath);	1434	req->data = newSVsv (newpath);
707	req->dataptr = SvPVbyte_nolen (req->data);	1435	req->dataptr = SvPVbyte_nolen (req->data);
708		1436
709	send_req (req);	1437	REQ_SEND;
710	}	1438	}
711		1439
712	void	1440	void
		1441	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1442	SV * pathname
		1443	SV * callback
		1444	UV mode
		1445	UV dev
		1446	PPCODE:
		1447	{
		1448	dREQ;
		1449
		1450	req->type = REQ_MKNOD;
		1451	req->data = newSVsv (pathname);
		1452	req->dataptr = SvPVbyte_nolen (req->data);
		1453	req->mode = (mode_t)mode;
		1454	req->offset = dev;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
		1460	aio_busy (delay,callback=&PL_sv_undef)
		1461	double delay
		1462	SV * callback
		1463	PPCODE:
		1464	{
		1465	dREQ;
		1466
		1467	req->type = REQ_BUSY;
		1468	req->fd = delay < 0. ? 0 : delay;
		1469	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1470
		1471	REQ_SEND;
		1472	}
		1473
		1474	void
		1475	aio_group (callback=&PL_sv_undef)
		1476	SV * callback
		1477	PROTOTYPE: ;$
		1478	PPCODE:
		1479	{
		1480	dREQ;
		1481
		1482	req->type = REQ_GROUP;
		1483	req_send (req);
		1484
		1485	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1486	}
		1487
		1488	void
		1489	aio_nop (callback=&PL_sv_undef)
		1490	SV * callback
		1491	PPCODE:
		1492	{
		1493	dREQ;
		1494
		1495	req->type = REQ_NOP;
		1496
		1497	REQ_SEND;
		1498	}
		1499
		1500	int
		1501	aioreq_pri (int pri = 0)
		1502	PROTOTYPE: ;$
		1503	CODE:
		1504	RETVAL = next_pri - PRI_BIAS;
		1505	if (items > 0)
		1506	{
		1507	if (pri < PRI_MIN) pri = PRI_MIN;
		1508	if (pri > PRI_MAX) pri = PRI_MAX;
		1509	next_pri = pri + PRI_BIAS;
		1510	}
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	void
		1515	aioreq_nice (int nice = 0)
		1516	CODE:
		1517	nice = next_pri - nice;
		1518	if (nice < PRI_MIN) nice = PRI_MIN;
		1519	if (nice > PRI_MAX) nice = PRI_MAX;
		1520	next_pri = nice + PRI_BIAS;
		1521
		1522	void
713	flush()	1523	flush ()
714	PROTOTYPE:	1524	PROTOTYPE:
715	CODE:	1525	CODE:
716	while (nreqs)	1526	while (nreqs)
717	{	1527	{
718	poll_wait ();	1528	poll_wait ();
719	poll_cb ();	1529	poll_cb (0);
720	}	1530	}
721		1531
722	void	1532	void
723	poll()	1533	poll()
724	PROTOTYPE:	1534	PROTOTYPE:
725	CODE:	1535	CODE:
726	if (nreqs)	1536	if (nreqs)
727	{	1537	{
728	poll_wait ();	1538	poll_wait ();
729	poll_cb ();	1539	poll_cb (0);
730	}	1540	}
731		1541
732	int	1542	int
733	poll_fileno()	1543	poll_fileno()
734	PROTOTYPE:	1544	PROTOTYPE:
…		…
739		1549
740	int	1550	int
741	poll_cb(...)	1551	poll_cb(...)
742	PROTOTYPE:	1552	PROTOTYPE:
743	CODE:	1553	CODE:
744	RETVAL = poll_cb ();	1554	RETVAL = poll_cb (0);
		1555	OUTPUT:
		1556	RETVAL
		1557
		1558	int
		1559	poll_some(int max = 0)
		1560	PROTOTYPE: $
		1561	CODE:
		1562	RETVAL = poll_cb (max);
745	OUTPUT:	1563	OUTPUT:
746	RETVAL	1564	RETVAL
747		1565
748	void	1566	void
749	poll_wait()	1567	poll_wait()
…		…
758	CODE:	1576	CODE:
759	RETVAL = nreqs;	1577	RETVAL = nreqs;
760	OUTPUT:	1578	OUTPUT:
761	RETVAL	1579	RETVAL
762		1580
		1581	int
		1582	nready()
		1583	PROTOTYPE:
		1584	CODE:
		1585	RETVAL = get_nready ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	npending()
		1591	PROTOTYPE:
		1592	CODE:
		1593	RETVAL = get_npending ();
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	PROTOTYPES: DISABLE
		1598
		1599	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1600
		1601	void
		1602	cancel (aio_req_ornot req)
		1603	CODE:
		1604	req_cancel (req);
		1605
		1606	void
		1607	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1608	CODE:
		1609	SvREFCNT_dec (req->callback);
		1610	req->callback = newSVsv (callback);
		1611
		1612	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1613
		1614	void
		1615	add (aio_req grp, ...)
		1616	PPCODE:
		1617	{
		1618	int i;
		1619	aio_req req;
		1620
		1621	if (grp->fd == 2)
		1622	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1623
		1624	for (i = 1; i < items; ++i )
		1625	{
		1626	if (GIMME_V != G_VOID)
		1627	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1628
		1629	req = SvAIO_REQ (ST (i));
		1630
		1631	if (req)
		1632	{
		1633	++grp->length;
		1634	req->grp = grp;
		1635
		1636	req->grp_prev = 0;
		1637	req->grp_next = grp->grp_first;
		1638
		1639	if (grp->grp_first)
		1640	grp->grp_first->grp_prev = req;
		1641
		1642	grp->grp_first = req;
		1643	}
		1644	}
		1645	}
		1646
		1647	void
		1648	cancel_subs (aio_req_ornot req)
		1649	CODE:
		1650	req_cancel_subs (req);
		1651
		1652	void
		1653	result (aio_req grp, ...)
		1654	CODE:
		1655	{
		1656	int i;
		1657	AV *av;
		1658
		1659	grp->errorno = errno;
		1660
		1661	av = newAV ();
		1662
		1663	for (i = 1; i < items; ++i )
		1664	av_push (av, newSVsv (ST (i)));
		1665
		1666	SvREFCNT_dec (grp->data);
		1667	grp->data = (SV *)av;
		1668	}
		1669
		1670	void
		1671	errno (aio_req grp, int errorno = errno)
		1672	CODE:
		1673	grp->errorno = errorno;
		1674
		1675	void
		1676	limit (aio_req grp, int limit)
		1677	CODE:
		1678	grp->fd2 = limit;
		1679	aio_grp_feed (grp);
		1680
		1681	void
		1682	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1683	CODE:
		1684	{
		1685	SvREFCNT_dec (grp->fh2);
		1686	grp->fh2 = newSVsv (callback);
		1687
		1688	if (grp->fd2 <= 0)
		1689	grp->fd2 = 2;
		1690
		1691	aio_grp_feed (grp);
		1692	}
		1693

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