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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 1.81 by root, Fri Oct 27 20:10:06 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	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
		637	static void poll_wait ()
		638	{
78	fd_set rfd;	639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
79	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
80	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
81		655
82	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	657	}
84	}	658	}
85		659
86	static int	660	static int poll_cb (int max)
87	poll_cb ()
88	{	661	{
89	dSP;	662	dSP;
90	int count = 0;	663	int count = 0;
91	int do_croak = 0;	664	int do_croak = 0;
92	aio_req req, prv;	665	aio_req req;
93		666
94	pthread_mutex_lock (&reslock);	667	for (;;)
95
96	{	668	{
97	/* read any signals sent by the worker threads */	669	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	{	670	{
116	int errorno = errno;	671	maybe_start_thread ();
117	errno = req->errorno;
118		672
119	if (req->type == REQ_READ)	673	LOCK (reslock);
120	SvCUR_set (req->data, req->dataoffset	674	req = reqq_shift (&res_queue);
121	+ req->result > 0 ? req->result : 0);
122		675
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)	676	if (req)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	677	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	678	--npending;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		679
135	Safefree (req->statdata);	680	if (!res_queue.size)
		681	{
		682	/* read any signals sent by the worker threads */
		683	char buf [32];
		684	while (read (respipe [0], buf, 32) == 32)
		685	;
		686	}
136	}	687	}
137		688
138	ENTER;	689	UNLOCK (reslock);
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141		690
		691	if (!req)
		692	break;
		693
		694	--nreqs;
		695
142	if (req->type == REQ_OPEN)	696	if (req->type == REQ_GROUP && req->length)
143	{	697	{
144	/* convert fd to fh */	698	req->fd = 1; /* mark request as delayed */
145	SV *fh;	699	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	}	700	}
156		701	else
157	if (SvOK (req->callback))
158	{	702	{
159	PUTBACK;	703	if (req->type == REQ_READ)
160	call_sv (req->callback, G_VOID | G_EVAL);	704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
161	SPAGAIN;	705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
		710	{
		711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		712	PL_laststatval = req->result;
		713	PL_statcache = *(req->statdata);
		714	}
		715
		716	req_invoke (req);
		717
		718	count++;
162	}	719	}
163		720
164	do_croak = SvTRUE (ERRSV);	721	req_free (req);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}	722	}
174		723
175	prv = req;	724	if (nreqs <= max_outstanding)
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);	725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
181	}	730	}
182		731
183	return count;	732	return count;
184	}	733	}
185		734
186	static void *aio_proc(void *arg);	735	static void create_pipe ()
187
188	static void
189	start_thread (void)
190	{	736	{
191	sigset_t fullsigset, oldsigset;	737	if (pipe (respipe))
192	pthread_t tid;	738	croak ("unable to initialize result pipe");
193	pthread_attr_t attr;
194		739
195	pthread_attr_init (&attr);	740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
196	pthread_attr_setstacksize (&attr, STACKSIZE);	741	croak ("cannot set result pipe to nonblocking mode");
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198		742
199	sigfillset (&fullsigset);	743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	744	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	}	745	}
317		746
318	/*****************************************************************************/	747	/*****************************************************************************/
319	/* work around various missing functions */	748	/* work around various missing functions */
320		749
…		…
325	/*	754	/*
326	* make our pread/pwrite safe against themselves, but not against	755	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,	756	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.	757	* but that's your problem, not mine.
329	*/	758	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
331		760
332	static ssize_t	761	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	{	762	{
335	ssize_t res;	763	ssize_t res;
336	off_t ooffset;	764	off_t ooffset;
337		765
338	pthread_mutex_lock (&iolock);	766	LOCK (preadwritelock);
339	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);	769	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);	771	UNLOCK (preadwritelock);
344		772
345	return res;	773	return res;
346	}	774	}
347		775
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
350	{	777	{
351	ssize_t res;	778	ssize_t res;
352	off_t ooffset;	779	off_t ooffset;
353		780
354	pthread_mutex_lock (&iolock);	781	LOCK (preadwritelock);
355	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);	784	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);	786	UNLOCK (preadwritelock);
360		787
361	return res;	788	return res;
362	}	789	}
363	#endif	790	#endif
364		791
365	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
366	# define fdatasync fsync	793	# define fdatasync fsync
367	#endif	794	#endif
368		795
369	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
370	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
371		798
372	static char readahead_buf[4096];	799	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	{	800	{
		801	dBUF;
		802
377	while (count > 0)	803	while (count > 0)
378	{	804	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
380		806
381	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
382	offset += len;	808	offset += len;
383	count -= len;	809	count -= len;
384	}	810	}
385		811
386	errno = 0;	812	errno = 0;
387	}	813	}
		814
		815	#endif
		816
		817	#if !HAVE_READDIR_R
		818	# define readdir_r aio_readdir_r
		819
		820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		821
		822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		823	{
		824	struct dirent *e;
		825	int errorno;
		826
		827	LOCK (readdirlock);
		828
		829	e = readdir (dirp);
		830	errorno = errno;
		831
		832	if (e)
		833	{
		834	*res = ent;
		835	strcpy (ent->d_name, e->d_name);
		836	}
		837	else
		838	*res = 0;
		839
		840	UNLOCK (readdirlock);
		841
		842	errno = errorno;
		843	return e ? 0 : -1;
		844	}
		845	#endif
		846
		847	/* sendfile always needs emulation */
		848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		849	{
		850	ssize_t res;
		851
		852	if (!count)
		853	return 0;
		854
		855	#if HAVE_SENDFILE
		856	# if __linux
		857	res = sendfile (ofd, ifd, &offset, count);
		858
		859	# elif __freebsd
		860	/*
		861	* Of course, the freebsd sendfile is a dire hack with no thoughts
		862	* wasted on making it similar to other I/O functions.
		863	*/
		864	{
		865	off_t sbytes;
		866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		867
		868	if (res < 0 && sbytes)
		869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		870	res = sbytes;
		871	}
		872
		873	# elif __hpux
		874	res = sendfile (ofd, ifd, offset, count, 0, 0);
		875
		876	# elif __solaris
		877	{
		878	struct sendfilevec vec;
		879	size_t sbytes;
		880
		881	vec.sfv_fd = ifd;
		882	vec.sfv_flag = 0;
		883	vec.sfv_off = offset;
		884	vec.sfv_len = count;
		885
		886	res = sendfilev (ofd, &vec, 1, &sbytes);
		887
		888	if (res < 0 && sbytes)
		889	res = sbytes;
		890	}
		891
388	#endif	892	# endif
		893	#else
		894	res = -1;
		895	errno = ENOSYS;
		896	#endif
		897
		898	if (res < 0
		899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		900	#if __solaris
		901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		902	#endif
		903	)
		904	)
		905	{
		906	/* emulate sendfile. this is a major pain in the ass */
		907	dBUF;
		908
		909	res = 0;
		910
		911	while (count)
		912	{
		913	ssize_t cnt;
		914
		915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		916
		917	if (cnt <= 0)
		918	{
		919	if (cnt && !res) res = -1;
		920	break;
		921	}
		922
		923	cnt = write (ofd, aio_buf, cnt);
		924
		925	if (cnt <= 0)
		926	{
		927	if (cnt && !res) res = -1;
		928	break;
		929	}
		930
		931	offset += cnt;
		932	res += cnt;
		933	count -= cnt;
		934	}
		935	}
		936
		937	return res;
		938	}
		939
		940	/* read a full directory */
		941	static void scandir_ (aio_req req, worker *self)
		942	{
		943	DIR *dirp;
		944	union
		945	{
		946	struct dirent d;
		947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		948	} *u;
		949	struct dirent *entp;
		950	char *name, *names;
		951	int memlen = 4096;
		952	int memofs = 0;
		953	int res = 0;
		954	int errorno;
		955
		956	LOCK (wrklock);
		957	self->dirp = dirp = opendir (req->dataptr);
		958	self->dbuf = u = malloc (sizeof (*u));
		959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
		961
		962	if (dirp && u && names)
		963	for (;;)
		964	{
		965	errno = 0;
		966	readdir_r (dirp, &u->d, &entp);
		967
		968	if (!entp)
		969	break;
		970
		971	name = entp->d_name;
		972
		973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		974	{
		975	int len = strlen (name) + 1;
		976
		977	res++;
		978
		979	while (memofs + len > memlen)
		980	{
		981	memlen *= 2;
		982	LOCK (wrklock);
		983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
		986	if (!names)
		987	break;
		988	}
		989
		990	memcpy (names + memofs, name, len);
		991	memofs += len;
		992	}
		993	}
		994
		995	if (errno)
		996	res = -1;
		997
		998	req->result = res;
		999	}
389		1000
390	/*****************************************************************************/	1001	/*****************************************************************************/
391		1002
392	static void *
393	aio_proc (void *thr_arg)	1003	static void *aio_proc (void *thr_arg)
394	{	1004	{
395	aio_req req;	1005	aio_req req;
396	int type;	1006	worker *self = (worker *)thr_arg;
397		1007
398	do	1008	for (;;)
399	{	1009	{
400	pthread_mutex_lock (&reqlock);	1010	LOCK (reqlock);
401		1011
402	for (;;)	1012	for (;;)
403	{	1013	{
404	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
405
406	if (reqs)
407	{
408	reqs = reqs->next;
409	if (!reqs) reqe = 0;
410	}
411		1015
412	if (req)	1016	if (req)
413	break;	1017	break;
414		1018
415	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
416	}	1020	}
417		1021
418	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
419		1025
420	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
421		1027
422	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
423
424	switch (type)	1029	switch (req->type)
425	{	1030	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1031	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;	1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428		1033
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
430		1036
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434		1040
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
440		1049
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1052	case REQ_READDIR: scandir_ (req, self); break;
443		1053
		1054	case REQ_BUSY:
		1055	{
		1056	struct timeval tv;
		1057
		1058	tv.tv_sec = req->fd;
		1059	tv.tv_usec = req->fd2;
		1060
		1061	req->result = select (0, 0, 0, 0, &tv);
		1062	}
		1063
		1064	case REQ_GROUP:
		1065	case REQ_NOP:
		1066	break;
		1067
444	case REQ_QUIT:	1068	case REQ_QUIT:
445	break;	1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
		1073	return 0;
446		1074
447	default:	1075	default:
448	req->result = ENOSYS;	1076	req->result = ENOSYS;
449	break;	1077	break;
450	}	1078	}
451		1079
452	req->errorno = errno;	1080	req->errorno = errno;
453		1081
454	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
455		1083
456	req->next = 0;	1084	++npending;
457		1085
458	if (rese)	1086	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 */	1087	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
469	}
470		1089
471	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
		1091	worker_clear (self);
		1092
		1093	UNLOCK (reslock);
		1094	}
		1095	}
		1096
		1097	/*****************************************************************************/
		1098
		1099	static void atfork_prepare (void)
		1100	{
		1101	LOCK (wrklock);
		1102	LOCK (reqlock);
		1103	LOCK (reslock);
		1104	#if !HAVE_PREADWRITE
		1105	LOCK (preadwritelock);
		1106	#endif
		1107	#if !HAVE_READDIR_R
		1108	LOCK (readdirlock);
		1109	#endif
		1110	}
		1111
		1112	static void atfork_parent (void)
		1113	{
		1114	#if !HAVE_READDIR_R
		1115	UNLOCK (readdirlock);
		1116	#endif
		1117	#if !HAVE_PREADWRITE
		1118	UNLOCK (preadwritelock);
		1119	#endif
		1120	UNLOCK (reslock);
		1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
		1123	}
		1124
		1125	static void atfork_child (void)
		1126	{
		1127	aio_req prv;
		1128
		1129	while (prv = reqq_shift (&req_queue))
		1130	req_free (prv);
		1131
		1132	while (prv = reqq_shift (&res_queue))
		1133	req_free (prv);
		1134
		1135	while (wrk_first.next != &wrk_first)
472	}	1136	{
473	while (type != REQ_QUIT);	1137	worker *wrk = wrk_first.next;
474		1138
475	return 0;	1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
		1146	started = 0;
		1147	nreqs = 0;
		1148
		1149	close (respipe [0]);
		1150	close (respipe [1]);
		1151	create_pipe ();
		1152
		1153	atfork_parent ();
476	}	1154	}
477		1155
478	#define dREQ \	1156	#define dREQ \
479	aio_req req; \	1157	aio_req req; \
		1158	int req_pri = next_pri; \
		1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
480	\	1160	\
481	if (SvOK (callback) && !SvROK (callback)) \	1161	if (SvOK (callback) && !SvROK (callback)) \
482	croak ("clalback must be undef or of reference type"); \	1162	croak ("callback must be undef or of reference type"); \
483	\	1163	\
484	Newz (0, req, 1, aio_cb); \	1164	Newz (0, req, 1, aio_cb); \
485	if (!req) \	1165	if (!req) \
486	croak ("out of memory during aio_req allocation"); \	1166	croak ("out of memory during aio_req allocation"); \
487	\	1167	\
488	req->callback = SvREFCNT_inc (callback);	1168	req->callback = newSVsv (callback); \
		1169	req->pri = req_pri
		1170
		1171	#define REQ_SEND \
		1172	req_send (req); \
		1173	\
		1174	if (GIMME_V != G_VOID) \
		1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));
489		1176
490	MODULE = IO::AIO PACKAGE = IO::AIO	1177	MODULE = IO::AIO PACKAGE = IO::AIO
491		1178
492	PROTOTYPES: ENABLE	1179	PROTOTYPES: ENABLE
493		1180
494	BOOT:	1181	BOOT:
495	{	1182	{
496	if (pipe (respipe))	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
497	croak ("unable to initialize result pipe");	1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
498		1189
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1190	create_pipe ();
500	croak ("cannot set result pipe to nonblocking mode");
501
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
503	croak ("cannot set result pipe to nonblocking mode");
504
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
506	}
507		1192
		1193	start_thread ();
		1194	}
		1195
508	void	1196	void
509	min_parallel(nthreads)	1197	min_parallel (int nthreads)
510	int nthreads
511	PROTOTYPE: $	1198	PROTOTYPE: $
512		1199
513	void	1200	void
514	max_parallel(nthreads)	1201	max_parallel (int nthreads)
515	int nthreads
516	PROTOTYPE: $	1202	PROTOTYPE: $
517		1203
518	int	1204	int
519	max_outstanding(nreqs)	1205	max_outstanding (int maxreqs)
520	int nreqs	1206	PROTOTYPE: $
521	PROTOTYPE: $
522	CODE:	1207	CODE:
523	RETVAL = max_outstanding;	1208	RETVAL = max_outstanding;
524	max_outstanding = nreqs;	1209	max_outstanding = maxreqs;
		1210	OUTPUT:
		1211	RETVAL
525		1212
526	void	1213	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
528	SV * pathname	1215	SV * pathname
529	int flags	1216	int flags
530	int mode	1217	int mode
531	SV * callback	1218	SV * callback
532	PROTOTYPE: $$$;$	1219	PROTOTYPE: $$$;$
533	CODE:	1220	PPCODE:
534	{	1221	{
535	dREQ;	1222	dREQ;
536		1223
537	req->type = REQ_OPEN;	1224	req->type = REQ_OPEN;
538	req->data = newSVsv (pathname);	1225	req->data = newSVsv (pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);	1226	req->dataptr = SvPVbyte_nolen (req->data);
540	req->fd = flags;	1227	req->fd = flags;
541	req->mode = mode;	1228	req->mode = mode;
542		1229
543	send_req (req);	1230	REQ_SEND;
544	}	1231	}
545		1232
546	void	1233	void
547	aio_close(fh,callback=&PL_sv_undef)	1234	aio_close (fh,callback=&PL_sv_undef)
548	SV * fh	1235	SV * fh
549	SV * callback	1236	SV * callback
550	PROTOTYPE: $;$	1237	PROTOTYPE: $;$
551	ALIAS:	1238	ALIAS:
552	aio_close = REQ_CLOSE	1239	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	1240	aio_fsync = REQ_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	1241	aio_fdatasync = REQ_FDATASYNC
555	CODE:	1242	PPCODE:
556	{	1243	{
557	dREQ;	1244	dREQ;
558		1245
559	req->type = ix;	1246	req->type = ix;
560	req->fh = newSVsv (fh);	1247	req->fh = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1248	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
562		1249
563	send_req (req);	1250	REQ_SEND (req);
564	}	1251	}
565		1252
566	void	1253	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1254	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
568	SV * fh	1255	SV * fh
569	UV offset	1256	UV offset
570	IV length	1257	UV length
571	SV * data	1258	SV * data
572	IV dataoffset	1259	UV dataoffset
573	SV * callback	1260	SV * callback
574	ALIAS:	1261	ALIAS:
575	aio_read = REQ_READ	1262	aio_read = REQ_READ
576	aio_write = REQ_WRITE	1263	aio_write = REQ_WRITE
577	PROTOTYPE: $$$$$;$	1264	PROTOTYPE: $$$$$;$
578	CODE:	1265	PPCODE:
579	{	1266	{
580	aio_req req;	1267	aio_req req;
581	STRLEN svlen;	1268	STRLEN svlen;
582	char *svptr = SvPVbyte (data, svlen);	1269	char *svptr = SvPVbyte (data, svlen);
583		1270
…		…
614	: IoOFP (sv_2io (fh)));	1301	: IoOFP (sv_2io (fh)));
615	req->offset = offset;	1302	req->offset = offset;
616	req->length = length;	1303	req->length = length;
617	req->data = SvREFCNT_inc (data);	1304	req->data = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	1305	req->dataptr = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);
620		1306
621	send_req (req);	1307	if (!SvREADONLY (data))
		1308	{
		1309	SvREADONLY_on (data);
		1310	req->data2ptr = (void *)data;
		1311	}
		1312
		1313	REQ_SEND;
622	}	1314	}
623	}	1315	}
624		1316
625	void	1317	void
		1318	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1319	SV * out_fh
		1320	SV * in_fh
		1321	UV in_offset
		1322	UV length
		1323	SV * callback
		1324	PROTOTYPE: $$$$;$
		1325	PPCODE:
		1326	{
		1327	dREQ;
		1328
		1329	req->type = REQ_SENDFILE;
		1330	req->fh = newSVsv (out_fh);
		1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1332	req->fh2 = newSVsv (in_fh);
		1333	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1334	req->offset = in_offset;
		1335	req->length = length;
		1336
		1337	REQ_SEND;
		1338	}
		1339
		1340	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1341	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
627	SV * fh	1342	SV * fh
628	UV offset	1343	UV offset
629	IV length	1344	IV length
630	SV * callback	1345	SV * callback
631	PROTOTYPE: $$$;$	1346	PROTOTYPE: $$$;$
632	CODE:	1347	PPCODE:
633	{	1348	{
634	dREQ;	1349	dREQ;
635		1350
636	req->type = REQ_READAHEAD;	1351	req->type = REQ_READAHEAD;
637	req->fh = newSVsv (fh);	1352	req->fh = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1353	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
639	req->offset = offset;	1354	req->offset = offset;
640	req->length = length;	1355	req->length = length;
641		1356
642	send_req (req);	1357	REQ_SEND;
643	}	1358	}
644		1359
645	void	1360	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)	1361	aio_stat (fh_or_path,callback=&PL_sv_undef)
647	SV * fh_or_path	1362	SV * fh_or_path
648	SV * callback	1363	SV * callback
649	ALIAS:	1364	ALIAS:
650	aio_stat = REQ_STAT	1365	aio_stat = REQ_STAT
651	aio_lstat = REQ_LSTAT	1366	aio_lstat = REQ_LSTAT
652	CODE:	1367	PPCODE:
653	{	1368	{
654	dREQ;	1369	dREQ;
655		1370
656	New (0, req->statdata, 1, Stat_t);	1371	New (0, req->statdata, 1, Stat_t);
657	if (!req->statdata)	1372	if (!req->statdata)
		1373	{
		1374	req_free (req);
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1375	croak ("out of memory during aio_req->statdata allocation");
		1376	}
659		1377
660	if (SvPOK (fh_or_path))	1378	if (SvPOK (fh_or_path))
661	{	1379	{
662	req->type = ix;	1380	req->type = ix;
663	req->data = newSVsv (fh_or_path);	1381	req->data = newSVsv (fh_or_path);
…		…
668	req->type = REQ_FSTAT;	1386	req->type = REQ_FSTAT;
669	req->fh = newSVsv (fh_or_path);	1387	req->fh = newSVsv (fh_or_path);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1388	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
671	}	1389	}
672		1390
673	send_req (req);	1391	REQ_SEND;
674	}	1392	}
675		1393
676	void	1394	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	1395	aio_unlink (pathname,callback=&PL_sv_undef)
678	SV * pathname	1396	SV * pathname
679	SV * callback	1397	SV * callback
680	ALIAS:	1398	ALIAS:
681	aio_unlink = REQ_UNLINK	1399	aio_unlink = REQ_UNLINK
682	aio_rmdir = REQ_RMDIR	1400	aio_rmdir = REQ_RMDIR
		1401	aio_readdir = REQ_READDIR
683	CODE:	1402	PPCODE:
684	{	1403	{
685	dREQ;	1404	dREQ;
686		1405
687	req->type = ix;	1406	req->type = ix;
688	req->data = newSVsv (pathname);	1407	req->data = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	1408	req->dataptr = SvPVbyte_nolen (req->data);
690		1409
691	send_req (req);	1410	REQ_SEND;
692	}	1411	}
693		1412
694	void	1413	void
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1414	aio_link (oldpath,newpath,callback=&PL_sv_undef)
696	SV * oldpath	1415	SV * oldpath
697	SV * newpath	1416	SV * newpath
698	SV * callback	1417	SV * callback
		1418	ALIAS:
		1419	aio_link = REQ_LINK
		1420	aio_symlink = REQ_SYMLINK
		1421	aio_rename = REQ_RENAME
699	CODE:	1422	PPCODE:
700	{	1423	{
701	dREQ;	1424	dREQ;
702		1425
703	req->type = REQ_SYMLINK;	1426	req->type = ix;
704	req->fh = newSVsv (oldpath);	1427	req->fh = newSVsv (oldpath);
705	req->data2ptr = SvPVbyte_nolen (req->fh);	1428	req->data2ptr = SvPVbyte_nolen (req->fh);
706	req->data = newSVsv (newpath);	1429	req->data = newSVsv (newpath);
707	req->dataptr = SvPVbyte_nolen (req->data);	1430	req->dataptr = SvPVbyte_nolen (req->data);
708		1431
709	send_req (req);	1432	REQ_SEND;
710	}	1433	}
711		1434
712	void	1435	void
		1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1437	SV * pathname
		1438	SV * callback
		1439	UV mode
		1440	UV dev
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = REQ_MKNOD;
		1446	req->data = newSVsv (pathname);
		1447	req->dataptr = SvPVbyte_nolen (req->data);
		1448	req->mode = (mode_t)mode;
		1449	req->offset = dev;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
		1455	aio_busy (delay,callback=&PL_sv_undef)
		1456	double delay
		1457	SV * callback
		1458	PPCODE:
		1459	{
		1460	dREQ;
		1461
		1462	req->type = REQ_BUSY;
		1463	req->fd = delay < 0. ? 0 : delay;
		1464	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1465
		1466	REQ_SEND;
		1467	}
		1468
		1469	void
		1470	aio_group (callback=&PL_sv_undef)
		1471	SV * callback
		1472	PROTOTYPE: ;$
		1473	PPCODE:
		1474	{
		1475	dREQ;
		1476
		1477	req->type = REQ_GROUP;
		1478	req_send (req);
		1479
		1480	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1481	}
		1482
		1483	void
		1484	aio_nop (callback=&PL_sv_undef)
		1485	SV * callback
		1486	PPCODE:
		1487	{
		1488	dREQ;
		1489
		1490	req->type = REQ_NOP;
		1491
		1492	REQ_SEND;
		1493	}
		1494
		1495	int
		1496	aioreq_pri (int pri = 0)
		1497	PROTOTYPE: ;$
		1498	CODE:
		1499	RETVAL = next_pri - PRI_BIAS;
		1500	if (items > 0)
		1501	{
		1502	if (pri < PRI_MIN) pri = PRI_MIN;
		1503	if (pri > PRI_MAX) pri = PRI_MAX;
		1504	next_pri = pri + PRI_BIAS;
		1505	}
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	void
		1510	aioreq_nice (int nice = 0)
		1511	CODE:
		1512	nice = next_pri - nice;
		1513	if (nice < PRI_MIN) nice = PRI_MIN;
		1514	if (nice > PRI_MAX) nice = PRI_MAX;
		1515	next_pri = nice + PRI_BIAS;
		1516
		1517	void
713	flush()	1518	flush ()
714	PROTOTYPE:	1519	PROTOTYPE:
715	CODE:	1520	CODE:
716	while (nreqs)	1521	while (nreqs)
717	{	1522	{
718	poll_wait ();	1523	poll_wait ();
719	poll_cb ();	1524	poll_cb (0);
720	}	1525	}
721		1526
722	void	1527	void
723	poll()	1528	poll()
724	PROTOTYPE:	1529	PROTOTYPE:
725	CODE:	1530	CODE:
726	if (nreqs)	1531	if (nreqs)
727	{	1532	{
728	poll_wait ();	1533	poll_wait ();
729	poll_cb ();	1534	poll_cb (0);
730	}	1535	}
731		1536
732	int	1537	int
733	poll_fileno()	1538	poll_fileno()
734	PROTOTYPE:	1539	PROTOTYPE:
…		…
739		1544
740	int	1545	int
741	poll_cb(...)	1546	poll_cb(...)
742	PROTOTYPE:	1547	PROTOTYPE:
743	CODE:	1548	CODE:
744	RETVAL = poll_cb ();	1549	RETVAL = poll_cb (0);
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	poll_some(int max = 0)
		1555	PROTOTYPE: $
		1556	CODE:
		1557	RETVAL = poll_cb (max);
745	OUTPUT:	1558	OUTPUT:
746	RETVAL	1559	RETVAL
747		1560
748	void	1561	void
749	poll_wait()	1562	poll_wait()
…		…
758	CODE:	1571	CODE:
759	RETVAL = nreqs;	1572	RETVAL = nreqs;
760	OUTPUT:	1573	OUTPUT:
761	RETVAL	1574	RETVAL
762		1575
		1576	int
		1577	nready()
		1578	PROTOTYPE:
		1579	CODE:
		1580	RETVAL = get_nready ();
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	int
		1585	npending()
		1586	PROTOTYPE:
		1587	CODE:
		1588	RETVAL = get_npending ();
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	PROTOTYPES: DISABLE
		1593
		1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1595
		1596	void
		1597	cancel (aio_req_ornot req)
		1598	CODE:
		1599	req_cancel (req);
		1600
		1601	void
		1602	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1603	CODE:
		1604	SvREFCNT_dec (req->callback);
		1605	req->callback = newSVsv (callback);
		1606
		1607	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1608
		1609	void
		1610	add (aio_req grp, ...)
		1611	PPCODE:
		1612	{
		1613	int i;
		1614	aio_req req;
		1615
		1616	if (grp->fd == 2)
		1617	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1618
		1619	for (i = 1; i < items; ++i )
		1620	{
		1621	if (GIMME_V != G_VOID)
		1622	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1623
		1624	req = SvAIO_REQ (ST (i));
		1625
		1626	if (req)
		1627	{
		1628	++grp->length;
		1629	req->grp = grp;
		1630
		1631	req->grp_prev = 0;
		1632	req->grp_next = grp->grp_first;
		1633
		1634	if (grp->grp_first)
		1635	grp->grp_first->grp_prev = req;
		1636
		1637	grp->grp_first = req;
		1638	}
		1639	}
		1640	}
		1641
		1642	void
		1643	cancel_subs (aio_req_ornot req)
		1644	CODE:
		1645	req_cancel_subs (req);
		1646
		1647	void
		1648	result (aio_req grp, ...)
		1649	CODE:
		1650	{
		1651	int i;
		1652	AV *av;
		1653
		1654	grp->errorno = errno;
		1655
		1656	av = newAV ();
		1657
		1658	for (i = 1; i < items; ++i )
		1659	av_push (av, newSVsv (ST (i)));
		1660
		1661	SvREFCNT_dec (grp->data);
		1662	grp->data = (SV *)av;
		1663	}
		1664
		1665	void
		1666	errno (aio_req grp, int errorno = errno)
		1667	CODE:
		1668	grp->errorno = errorno;
		1669
		1670	void
		1671	limit (aio_req grp, int limit)
		1672	CODE:
		1673	grp->fd2 = limit;
		1674	aio_grp_feed (grp);
		1675
		1676	void
		1677	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1678	CODE:
		1679	{
		1680	SvREFCNT_dec (grp->fh2);
		1681	grp->fh2 = newSVsv (callback);
		1682
		1683	if (grp->fd2 <= 0)
		1684	grp->fd2 = 2;
		1685
		1686	aio_grp_feed (grp);
		1687	}
		1688

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