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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC vs.
Revision 1.85 by root, Sat Oct 28 23:32:29 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	/* number of seconds after which idle threads exit */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	#define IDLE_TIMEOUT 10
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	50
		51	/* used for struct dirent, AIX doesn't provide it */
		52	#ifndef NAME_MAX
		53	# define NAME_MAX 4096
		54	#endif
		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
23		60
24	#if __ia64	61	#if __ia64
25	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	65	#else
27	# define STACKSIZE 4096	66	# define STACKSIZE 16384
		67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDACCESS_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDACCESS_UNSAFE 0
		76	# else
		77	# define WORDACCESS_UNSAFE 1
28	#endif	78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
29		91
30	enum {	92	enum {
31	REQ_QUIT,	93	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		96	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	100	REQ_MKNOD, REQ_READDIR,
		101	REQ_LINK, REQ_SYMLINK,
		102	REQ_GROUP, REQ_NOP,
		103	REQ_BUSY,
38	};	104	};
39		105
		106	#define AIO_REQ_KLASS "IO::AIO::REQ"
		107	#define AIO_GRP_KLASS "IO::AIO::GRP"
		108
40	typedef struct aio_cb {	109	typedef struct aio_cb
		110	{
41	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
42		112
43	int type;	113	SV *data, *callback;
44		114	SV *fh, *fh2;
45	int fd;	115	void *dataptr, *data2ptr;
		116	Stat_t *statdata;
46	off_t offset;	117	off_t offset;
47	size_t length;	118	size_t length;
48	ssize_t result;	119	ssize_t result;
		120
		121	STRLEN dataoffset;
		122	int type;
		123	int fd, fd2;
		124	int errorno;
49	mode_t mode; /* open */	125	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		126
55	Stat_t *statdata;	127	unsigned char flags;
		128	unsigned char pri;
		129
		130	SV *self; /* the perl counterpart of this request, if any */
		131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56	} aio_cb;	132	} aio_cb;
57		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	};
		137
58	typedef aio_cb *aio_req;	138	typedef aio_cb *aio_req;
		139	typedef aio_cb *aio_req_ornot;
59		140
60	static int started;	141	enum {
61	static volatile int nreqs;	142	PRI_MIN = -4,
62	static int max_outstanding = 1<<30;	143	PRI_MAX = 4,
		144
		145	DEFAULT_PRI = 0,
		146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		148	};
		149
		150	#define AIO_TICKS ((1000000 + 1023) >> 10)
		151
		152	static unsigned int max_poll_time = 0;
		153	static unsigned int max_poll_reqs = 0;
		154
		155	/* calculcate time difference in ~1/AIO_TICKS of a second */
		156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		157	{
		158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		160	}
		161
		162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		163
		164	static unsigned int started, idle, wanted;
		165
		166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		168	#else
		169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		170	#endif
		171
		172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		174
		175	/* worker threads management */
		176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		177
		178	typedef struct worker {
		179	/* locked by wrklock */
		180	struct worker *prev, *next;
		181
		182	pthread_t tid;
		183
		184	/* locked by reslock, reqlock or wrklock */
		185	aio_req req; /* currently processed request */
		186	void *dbuf;
		187	DIR *dirp;
		188	} worker;
		189
		190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		191
		192	static void worker_clear (worker *wrk)
		193	{
		194	if (wrk->dirp)
		195	{
		196	closedir (wrk->dirp);
		197	wrk->dirp = 0;
		198	}
		199
		200	if (wrk->dbuf)
		201	{
		202	free (wrk->dbuf);
		203	wrk->dbuf = 0;
		204	}
		205	}
		206
		207	static void worker_free (worker *wrk)
		208	{
		209	wrk->next->prev = wrk->prev;
		210	wrk->prev->next = wrk->next;
		211
		212	free (wrk);
		213	}
		214
		215	static volatile unsigned int nreqs, nready, npending;
		216	static volatile unsigned int max_idle = 4;
		217	static volatile unsigned int max_outstanding = 0xffffffff;
63	static int respipe [2];	218	static int respipe [2];
64		219
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	221	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;	222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		223
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	224	#if WORDACCESS_UNSAFE
71	static volatile aio_req ress, rese; /* queue start, queue end */
72		225
73	static void	226	static unsigned int get_nready ()
74	poll_wait ()
75	{	227	{
76	if (nreqs && !ress)	228	unsigned int retval;
77	{
78	fd_set rfd;
79	FD_ZERO(&rfd);
80	FD_SET(respipe [0], &rfd);
81		229
82	select (respipe [0] + 1, &rfd, 0, 0, 0);	230	LOCK (reqlock);
		231	retval = nready;
		232	UNLOCK (reqlock);
		233
		234	return retval;
		235	}
		236
		237	static unsigned int get_npending ()
		238	{
		239	unsigned int retval;
		240
		241	LOCK (reslock);
		242	retval = npending;
		243	UNLOCK (reslock);
		244
		245	return retval;
		246	}
		247
		248	static unsigned int get_nthreads ()
		249	{
		250	unsigned int retval;
		251
		252	LOCK (wrklock);
		253	retval = started;
		254	UNLOCK (wrklock);
		255
		256	return retval;
		257	}
		258
		259	#else
		260
		261	# define get_nready() nready
		262	# define get_npending() npending
		263	# define get_nthreads() started
		264
		265	#endif
		266
		267	/*
		268	* a somewhat faster data structure might be nice, but
		269	* with 8 priorities this actually needs <20 insns
		270	* per shift, the most expensive operation.
		271	*/
		272	typedef struct {
		273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		274	int size;
		275	} reqq;
		276
		277	static reqq req_queue;
		278	static reqq res_queue;
		279
		280	int reqq_push (reqq *q, aio_req req)
		281	{
		282	int pri = req->pri;
		283	req->next = 0;
		284
		285	if (q->qe[pri])
83	}	286	{
84	}	287	q->qe[pri]->next = req;
		288	q->qe[pri] = req;
		289	}
		290	else
		291	q->qe[pri] = q->qs[pri] = req;
85		292
86	static int	293	return q->size++;
87	poll_cb ()	294	}
		295
		296	aio_req reqq_shift (reqq *q)
		297	{
		298	int pri;
		299
		300	if (!q->size)
		301	return 0;
		302
		303	--q->size;
		304
		305	for (pri = NUM_PRI; pri--; )
		306	{
		307	aio_req req = q->qs[pri];
		308
		309	if (req)
		310	{
		311	if (!(q->qs[pri] = req->next))
		312	q->qe[pri] = 0;
		313
		314	return req;
		315	}
		316	}
		317
		318	abort ();
		319	}
		320
		321	static int poll_cb ();
		322	static void req_invoke (aio_req req);
		323	static void req_free (aio_req req);
		324	static void req_cancel (aio_req req);
		325
		326	/* must be called at most once */
		327	static SV *req_sv (aio_req req, const char *klass)
		328	{
		329	if (!req->self)
		330	{
		331	req->self = (SV *)newHV ();
		332	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		333	}
		334
		335	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		336	}
		337
		338	static aio_req SvAIO_REQ (SV *sv)
		339	{
		340	MAGIC *mg;
		341
		342	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		343	croak ("object of class " AIO_REQ_KLASS " expected");
		344
		345	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		346
		347	return mg ? (aio_req)mg->mg_ptr : 0;
		348	}
		349
		350	static void aio_grp_feed (aio_req grp)
		351	{
		352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		353	{
		354	int old_len = grp->length;
		355
		356	if (grp->fh2 && SvOK (grp->fh2))
		357	{
		358	dSP;
		359
		360	ENTER;
		361	SAVETMPS;
		362	PUSHMARK (SP);
		363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		364	PUTBACK;
		365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		366	SPAGAIN;
		367	FREETMPS;
		368	LEAVE;
		369	}
		370
		371	/* stop if no progress has been made */
		372	if (old_len == grp->length)
		373	{
		374	SvREFCNT_dec (grp->fh2);
		375	grp->fh2 = 0;
		376	break;
		377	}
		378	}
		379	}
		380
		381	static void aio_grp_dec (aio_req grp)
		382	{
		383	--grp->length;
		384
		385	/* call feeder, if applicable */
		386	aio_grp_feed (grp);
		387
		388	/* finish, if done */
		389	if (!grp->length && grp->fd)
		390	{
		391	req_invoke (grp);
		392	req_free (grp);
		393	}
		394	}
		395
		396	static void req_invoke (aio_req req)
88	{	397	{
89	dSP;	398	dSP;
90	int count = 0;
91	aio_req req, prv;
92		399
93	pthread_mutex_lock (&reslock);	400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
94
95	{	401	{
96	/* read any signals sent by the worker threads */	402	ENTER;
97	char buf [32];	403	SAVETMPS;
98	while (read (respipe [0], buf, 32) == 32)	404	PUSHMARK (SP);
99	;	405	EXTEND (SP, 1);
100	}
101		406
102	req = ress;	407	switch (req->type)
103	ress = rese = 0;
104
105	pthread_mutex_unlock (&reslock);
106
107	while (req)
108	{
109	nreqs--;
110
111	if (req->type == REQ_QUIT)
112	started--;
113	else
114	{	408	{
115	int errorno = errno;	409	case REQ_READDIR:
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{	410	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	411	SV *rv = &PL_sv_undef;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133		412
134	Safefree (req->statdata);	413	if (req->result >= 0)
		414	{
		415	int i;
		416	char *buf = req->data2ptr;
		417	AV *av = newAV ();
		418
		419	av_extend (av, req->result - 1);
		420
		421	for (i = 0; i < req->result; ++i)
		422	{
		423	SV *sv = newSVpv (buf, 0);
		424
		425	av_store (av, i, sv);
		426	buf += SvCUR (sv) + 1;
		427	}
		428
		429	rv = sv_2mortal (newRV_noinc ((SV *)av));
		430	}
		431
		432	PUSHs (rv);
135	}	433	}
		434	break;
136		435
137	ENTER;	436	case REQ_OPEN:
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140
141	if (req->type == REQ_OPEN)
142	{	437	{
143	/* convert fd to fh */	438	/* convert fd to fh */
144	SV *fh;	439	SV *fh;
145		440
		441	PUSHs (sv_2mortal (newSViv (req->result)));
146	PUTBACK;	442	PUTBACK;
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148	SPAGAIN;	444	SPAGAIN;
149		445
150	fh = SvREFCNT_inc (POPs);	446	fh = SvREFCNT_inc (POPs);
151		447
152	PUSHMARK (SP);	448	PUSHMARK (SP);
153	XPUSHs (sv_2mortal (fh));	449	XPUSHs (sv_2mortal (fh));
154	}	450	}
		451	break;
155		452
156	if (SvOK (req->callback))	453	case REQ_GROUP:
		454	req->fd = 2; /* mark group as finished */
		455
		456	if (req->data)
157	{	457	{
158	PUTBACK;	458	int i;
159	call_sv (req->callback, G_VOID | G_EVAL);	459	AV *av = (AV *)req->data;
160	SPAGAIN;	460
		461	EXTEND (SP, AvFILL (av) + 1);
		462	for (i = 0; i <= AvFILL (av); ++i)
		463	PUSHs (*av_fetch (av, i, 0));
161	}	464	}
		465	break;
162		466
163	LEAVE;	467	case REQ_NOP:
164		468	case REQ_BUSY:
165	if (req->callback)	469	break;
166	SvREFCNT_dec (req->callback);
167		470
168	errno = errorno;	471	default:
169	count++;	472	PUSHs (sv_2mortal (newSViv (req->result)));
		473	break;
170	}	474	}
171		475
172	prv = req;	476	errno = req->errorno;
173	req = req->next;
174	Safefree (prv);
175		477
176	/* TODO: croak on errors? */	478	PUTBACK;
		479	call_sv (req->callback, G_VOID | G_EVAL);
		480	SPAGAIN;
		481
		482	FREETMPS;
		483	LEAVE;
		484	}
		485
		486	if (req->grp)
177	}	487	{
		488	aio_req grp = req->grp;
178		489
179	return count;	490	/* unlink request */
		491	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		492	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		493
		494	if (grp->grp_first == req)
		495	grp->grp_first = req->grp_next;
		496
		497	aio_grp_dec (grp);
		498	}
		499
		500	if (SvTRUE (ERRSV))
		501	{
		502	req_free (req);
		503	croak (0);
		504	}
		505	}
		506
		507	static void req_free (aio_req req)
		508	{
		509	if (req->self)
		510	{
		511	sv_unmagic (req->self, PERL_MAGIC_ext);
		512	SvREFCNT_dec (req->self);
		513	}
		514
		515	SvREFCNT_dec (req->data);
		516	SvREFCNT_dec (req->fh);
		517	SvREFCNT_dec (req->fh2);
		518	SvREFCNT_dec (req->callback);
		519	Safefree (req->statdata);
		520
		521	if (req->type == REQ_READDIR)
		522	free (req->data2ptr);
		523
		524	Safefree (req);
		525	}
		526
		527	static void req_cancel_subs (aio_req grp)
		528	{
		529	aio_req sub;
		530
		531	if (grp->type != REQ_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->fh2);
		535	grp->fh2 = 0;
		536
		537	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		538	req_cancel (sub);
		539	}
		540
		541	static void req_cancel (aio_req req)
		542	{
		543	req->flags |= FLAG_CANCELLED;
		544
		545	req_cancel_subs (req);
180	}	546	}
181		547
182	static void *aio_proc(void *arg);	548	static void *aio_proc(void *arg);
183		549
184	static void
185	start_thread (void)	550	static void start_thread (void)
186	{	551	{
187	sigset_t fullsigset, oldsigset;	552	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	pthread_attr_t attr;	553	pthread_attr_t attr;
		554
		555	worker *wrk = calloc (1, sizeof (worker));
		556
		557	if (!wrk)
		558	croak ("unable to allocate worker thread data");
190		559
191	pthread_attr_init (&attr);	560	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);	561	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		563	#ifdef PTHREAD_SCOPE_PROCESS
		564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		565	#endif
194		566
195	sigfillset (&fullsigset);	567	sigfillset (&fullsigset);
		568
		569	LOCK (wrklock);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197		571
198	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		573	{
		574	wrk->prev = &wrk_first;
		575	wrk->next = wrk_first.next;
		576	wrk_first.next->prev = wrk;
		577	wrk_first.next = wrk;
199	started++;	578	++started;
		579	}
		580	else
		581	free (wrk);
200		582
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);	583	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		584	UNLOCK (wrklock);
202	}	585	}
203		586
204	static void	587	static void maybe_start_thread ()
205	send_req (aio_req req)
206	{	588	{
		589	if (get_nthreads () >= wanted)
		590	return;
		591
		592	/* todo: maybe use idle here, but might be less exact */
		593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		594	return;
		595
		596	start_thread ();
		597	}
		598
		599	static void req_send (aio_req req)
		600	{
207	nreqs++;	601	++nreqs;
208		602
209	pthread_mutex_lock (&reqlock);	603	LOCK (reqlock);
210		604	++nready;
211	req->next = 0;	605	reqq_push (&req_queue, req);
212
213	if (reqe)
214	{
215	reqe->next = req;
216	reqe = req;
217	}
218	else
219	reqe = reqs = req;
220
221	pthread_cond_signal (&reqwait);	606	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);	607	UNLOCK (reqlock);
223		608
		609	maybe_start_thread ();
		610	}
		611
		612	static void end_thread (void)
		613	{
		614	aio_req req;
		615
		616	Newz (0, req, 1, aio_cb);
		617
		618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
		620
		621	LOCK (reqlock);
		622	reqq_push (&req_queue, req);
		623	pthread_cond_signal (&reqwait);
		624	UNLOCK (reqlock);
		625
		626	LOCK (wrklock);
		627	--started;
		628	UNLOCK (wrklock);
		629	}
		630
		631	static void set_max_idle (int nthreads)
		632	{
		633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		634	max_idle = nthreads <= 0 ? 1 : nthreads;
		635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		636	}
		637
		638	static void min_parallel (int nthreads)
		639	{
		640	if (wanted < nthreads)
		641	wanted = nthreads;
		642	}
		643
		644	static void max_parallel (int nthreads)
		645	{
		646	if (wanted > nthreads)
		647	wanted = nthreads;
		648
		649	while (started > wanted)
		650	end_thread ();
		651	}
		652
		653	static void poll_wait ()
		654	{
		655	fd_set rfd;
		656
		657	while (nreqs)
		658	{
		659	int size;
		660	if (WORDACCESS_UNSAFE) LOCK (reslock);
		661	size = res_queue.size;
		662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		663
		664	if (size)
		665	return;
		666
		667	maybe_start_thread ();
		668
		669	FD_ZERO(&rfd);
		670	FD_SET(respipe [0], &rfd);
		671
		672	select (respipe [0] + 1, &rfd, 0, 0, 0);
		673	}
		674	}
		675
		676	static int poll_cb ()
		677	{
		678	dSP;
		679	int count = 0;
		680	int maxreqs = max_poll_reqs;
		681	int do_croak = 0;
		682	struct timeval tv_start, tv_now;
		683	aio_req req;
		684
		685	if (max_poll_time)
		686	gettimeofday (&tv_start, 0);
		687
		688	for (;;)
		689	{
		690	for (;;)
		691	{
		692	maybe_start_thread ();
		693
		694	LOCK (reslock);
		695	req = reqq_shift (&res_queue);
		696
		697	if (req)
		698	{
		699	--npending;
		700
		701	if (!res_queue.size)
		702	{
		703	/* read any signals sent by the worker threads */
		704	char buf [32];
		705	while (read (respipe [0], buf, 32) == 32)
		706	;
		707	}
		708	}
		709
		710	UNLOCK (reslock);
		711
		712	if (!req)
		713	break;
		714
		715	--nreqs;
		716
		717	if (req->type == REQ_GROUP && req->length)
		718	{
		719	req->fd = 1; /* mark request as delayed */
		720	continue;
		721	}
		722	else
		723	{
		724	if (req->type == REQ_READ)
		725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		726
		727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		728	SvREADONLY_off (req->data);
		729
		730	if (req->statdata)
		731	{
		732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		733	PL_laststatval = req->result;
		734	PL_statcache = *(req->statdata);
		735	}
		736
		737	req_invoke (req);
		738
		739	count++;
		740	}
		741
		742	req_free (req);
		743
		744	if (maxreqs && !--maxreqs)
		745	break;
		746
		747	if (max_poll_time)
		748	{
		749	gettimeofday (&tv_now, 0);
		750
		751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		752	break;
		753	}
		754	}
		755
224	while (nreqs > max_outstanding)	756	if (nreqs <= max_outstanding)
225	{	757	break;
		758
226	poll_wait ();	759	poll_wait ();
227	poll_cb ();
228	}
229	}
230		760
231	static void	761	++maxreqs;
232	end_thread (void)
233	{
234	aio_req req;
235	New (0, req, 1, aio_cb);
236	req->type = REQ_QUIT;
237
238	send_req (req);
239	}
240
241
242	static void min_parallel (int nthreads)
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}	762	}
278		763
279	max_parallel (0);	764	return count;
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}	765	}
298		766
299	static void atfork_parent (void)	767	static void create_pipe ()
300	{	768	{
301	pthread_mutex_unlock (&reslock);	769	if (pipe (respipe))
302	min_parallel (fork_started);	770	croak ("unable to initialize result pipe");
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306		771
307	static void atfork_child (void)	772	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
308	{	773	croak ("cannot set result pipe to nonblocking mode");
309	reqs = reqe = 0;
310		774
311	atfork_parent ();	775	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		776	croak ("cannot set result pipe to nonblocking mode");
312	}	777	}
313		778
314	/*****************************************************************************/	779	/*****************************************************************************/
315	/* work around various missing functions */	780	/* work around various missing functions */
316		781
…		…
321	/*	786	/*
322	* make our pread/pwrite safe against themselves, but not against	787	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,	788	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.	789	* but that's your problem, not mine.
325	*/	790	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	791	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327		792
328	static ssize_t	793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{	794	{
331	ssize_t res;	795	ssize_t res;
332	off_t ooffset;	796	off_t ooffset;
333		797
334	pthread_mutex_lock (&iolock);	798	LOCK (preadwritelock);
335	ooffset = lseek (fd, 0, SEEK_CUR);	799	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);	800	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);	801	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);	802	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);	803	UNLOCK (preadwritelock);
340		804
341	return res;	805	return res;
342	}	806	}
343		807
344	static ssize_t
345	pwrite (int fd, void *buf, size_t count, off_t offset)	808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
346	{	809	{
347	ssize_t res;	810	ssize_t res;
348	off_t ooffset;	811	off_t ooffset;
349		812
350	pthread_mutex_lock (&iolock);	813	LOCK (preadwritelock);
351	ooffset = lseek (fd, 0, SEEK_CUR);	814	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);	815	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);	816	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);	817	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);	818	UNLOCK (preadwritelock);
356		819
357	return res;	820	return res;
358	}	821	}
359	#endif	822	#endif
360		823
361	#if !HAVE_FDATASYNC	824	#if !HAVE_FDATASYNC
362	# define fdatasync fsync	825	# define fdatasync fsync
363	#endif	826	#endif
364		827
365	#if !HAVE_READAHEAD	828	#if !HAVE_READAHEAD
366	# define readahead aio_readahead	829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
367		830
368	static char readahead_buf[4096];	831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)
372	{	832	{
		833	dBUF;
		834
373	while (count > 0)	835	while (count > 0)
374	{	836	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
376		838
377	pread (fd, readahead_buf, len, offset);	839	pread (fd, aio_buf, len, offset);
378	offset += len;	840	offset += len;
379	count -= len;	841	count -= len;
380	}	842	}
381		843
382	errno = 0;	844	errno = 0;
383	}	845	}
		846
		847	#endif
		848
		849	#if !HAVE_READDIR_R
		850	# define readdir_r aio_readdir_r
		851
		852	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		853
		854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		855	{
		856	struct dirent *e;
		857	int errorno;
		858
		859	LOCK (readdirlock);
		860
		861	e = readdir (dirp);
		862	errorno = errno;
		863
		864	if (e)
		865	{
		866	*res = ent;
		867	strcpy (ent->d_name, e->d_name);
		868	}
		869	else
		870	*res = 0;
		871
		872	UNLOCK (readdirlock);
		873
		874	errno = errorno;
		875	return e ? 0 : -1;
		876	}
		877	#endif
		878
		879	/* sendfile always needs emulation */
		880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		881	{
		882	ssize_t res;
		883
		884	if (!count)
		885	return 0;
		886
		887	#if HAVE_SENDFILE
		888	# if __linux
		889	res = sendfile (ofd, ifd, &offset, count);
		890
		891	# elif __freebsd
		892	/*
		893	* Of course, the freebsd sendfile is a dire hack with no thoughts
		894	* wasted on making it similar to other I/O functions.
		895	*/
		896	{
		897	off_t sbytes;
		898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		899
		900	if (res < 0 && sbytes)
		901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		902	res = sbytes;
		903	}
		904
		905	# elif __hpux
		906	res = sendfile (ofd, ifd, offset, count, 0, 0);
		907
		908	# elif __solaris
		909	{
		910	struct sendfilevec vec;
		911	size_t sbytes;
		912
		913	vec.sfv_fd = ifd;
		914	vec.sfv_flag = 0;
		915	vec.sfv_off = offset;
		916	vec.sfv_len = count;
		917
		918	res = sendfilev (ofd, &vec, 1, &sbytes);
		919
		920	if (res < 0 && sbytes)
		921	res = sbytes;
		922	}
		923
384	#endif	924	# endif
		925	#else
		926	res = -1;
		927	errno = ENOSYS;
		928	#endif
		929
		930	if (res < 0
		931	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		932	#if __solaris
		933	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		934	#endif
		935	)
		936	)
		937	{
		938	/* emulate sendfile. this is a major pain in the ass */
		939	dBUF;
		940
		941	res = 0;
		942
		943	while (count)
		944	{
		945	ssize_t cnt;
		946
		947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		948
		949	if (cnt <= 0)
		950	{
		951	if (cnt && !res) res = -1;
		952	break;
		953	}
		954
		955	cnt = write (ofd, aio_buf, cnt);
		956
		957	if (cnt <= 0)
		958	{
		959	if (cnt && !res) res = -1;
		960	break;
		961	}
		962
		963	offset += cnt;
		964	res += cnt;
		965	count -= cnt;
		966	}
		967	}
		968
		969	return res;
		970	}
		971
		972	/* read a full directory */
		973	static void scandir_ (aio_req req, worker *self)
		974	{
		975	DIR *dirp;
		976	union
		977	{
		978	struct dirent d;
		979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		980	} *u;
		981	struct dirent *entp;
		982	char *name, *names;
		983	int memlen = 4096;
		984	int memofs = 0;
		985	int res = 0;
		986	int errorno;
		987
		988	LOCK (wrklock);
		989	self->dirp = dirp = opendir (req->dataptr);
		990	self->dbuf = u = malloc (sizeof (*u));
		991	req->data2ptr = names = malloc (memlen);
		992	UNLOCK (wrklock);
		993
		994	if (dirp && u && names)
		995	for (;;)
		996	{
		997	errno = 0;
		998	readdir_r (dirp, &u->d, &entp);
		999
		1000	if (!entp)
		1001	break;
		1002
		1003	name = entp->d_name;
		1004
		1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1006	{
		1007	int len = strlen (name) + 1;
		1008
		1009	res++;
		1010
		1011	while (memofs + len > memlen)
		1012	{
		1013	memlen *= 2;
		1014	LOCK (wrklock);
		1015	req->data2ptr = names = realloc (names, memlen);
		1016	UNLOCK (wrklock);
		1017
		1018	if (!names)
		1019	break;
		1020	}
		1021
		1022	memcpy (names + memofs, name, len);
		1023	memofs += len;
		1024	}
		1025	}
		1026
		1027	if (errno)
		1028	res = -1;
		1029
		1030	req->result = res;
		1031	}
385		1032
386	/*****************************************************************************/	1033	/*****************************************************************************/
387		1034
388	static void *
389	aio_proc (void *thr_arg)	1035	static void *aio_proc (void *thr_arg)
390	{	1036	{
391	aio_req req;	1037	aio_req req;
392	int type;	1038	struct timespec ts;
		1039	worker *self = (worker *)thr_arg;
393		1040
394	do	1041	/* try to distribute timeouts somewhat evenly */
		1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1043	* (1000000000UL / 1024UL);
		1044
		1045	for (;;)
395	{	1046	{
396	pthread_mutex_lock (&reqlock);	1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1048
		1049	LOCK (reqlock);
397		1050
398	for (;;)	1051	for (;;)
399	{	1052	{
400	req = reqs;	1053	self->req = req = reqq_shift (&req_queue);
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407		1054
408	if (req)	1055	if (req)
409	break;	1056	break;
410		1057
		1058	++idle;
		1059
		1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1061	== ETIMEDOUT)
		1062	{
		1063	if (idle > max_idle)
		1064	{
		1065	--idle;
		1066	UNLOCK (reqlock);
		1067	LOCK (wrklock);
		1068	--started;
		1069	UNLOCK (wrklock);
		1070	goto quit;
		1071	}
		1072
		1073	/* we are allowed to idle, so do so without any timeout */
411	pthread_cond_wait (&reqwait, &reqlock);	1074	pthread_cond_wait (&reqwait, &reqlock);
		1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1076	}
		1077
		1078	--idle;
412	}	1079	}
413		1080
414	pthread_mutex_unlock (&reqlock);	1081	--nready;
		1082
		1083	UNLOCK (reqlock);
415		1084
416	errno = 0; /* strictly unnecessary */	1085	errno = 0; /* strictly unnecessary */
417		1086
418	type = req->type;	1087	if (!(req->flags & FLAG_CANCELLED))
419
420	switch (type)	1088	switch (req->type)
421	{	1089	{
422	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
423	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424		1092
425	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
426		1095
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430		1099
431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1100	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432	case REQ_CLOSE: req->result = close (req->fd); break;	1101	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
436		1108
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	case REQ_FSYNC: req->result = fsync (req->fd); break;	1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1111	case REQ_READDIR: scandir_ (req, self); break;
439		1112
		1113	case REQ_BUSY:
		1114	{
		1115	struct timeval tv;
		1116
		1117	tv.tv_sec = req->fd;
		1118	tv.tv_usec = req->fd2;
		1119
		1120	req->result = select (0, 0, 0, 0, &tv);
		1121	}
		1122
		1123	case REQ_GROUP:
		1124	case REQ_NOP:
		1125	break;
		1126
440	case REQ_QUIT:	1127	case REQ_QUIT:
441	break;	1128	goto quit;
442		1129
443	default:	1130	default:
444	req->result = ENOSYS;	1131	req->result = ENOSYS;
445	break;	1132	break;
446	}	1133	}
447		1134
448	req->errorno = errno;	1135	req->errorno = errno;
449		1136
450	pthread_mutex_lock (&reslock);	1137	LOCK (reslock);
451		1138
452	req->next = 0;	1139	++npending;
453		1140
454	if (rese)	1141	if (!reqq_push (&res_queue, req))
455	{
456	rese->next = req;
457	rese = req;
458	}
459	else
460	{
461	rese = ress = req;
462
463	/* write a dummy byte to the pipe so fh becomes ready */	1142	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);	1143	write (respipe [1], &respipe, 1);
465	}
466		1144
467	pthread_mutex_unlock (&reslock);	1145	self->req = 0;
		1146	worker_clear (self);
		1147
		1148	UNLOCK (reslock);
468	}	1149	}
469	while (type != REQ_QUIT);	1150
		1151	quit:
		1152	LOCK (wrklock);
		1153	worker_free (self);
		1154	UNLOCK (wrklock);
470		1155
471	return 0;	1156	return 0;
		1157	}
		1158
		1159	/*****************************************************************************/
		1160
		1161	static void atfork_prepare (void)
		1162	{
		1163	LOCK (wrklock);
		1164	LOCK (reqlock);
		1165	LOCK (reslock);
		1166	#if !HAVE_PREADWRITE
		1167	LOCK (preadwritelock);
		1168	#endif
		1169	#if !HAVE_READDIR_R
		1170	LOCK (readdirlock);
		1171	#endif
		1172	}
		1173
		1174	static void atfork_parent (void)
		1175	{
		1176	#if !HAVE_READDIR_R
		1177	UNLOCK (readdirlock);
		1178	#endif
		1179	#if !HAVE_PREADWRITE
		1180	UNLOCK (preadwritelock);
		1181	#endif
		1182	UNLOCK (reslock);
		1183	UNLOCK (reqlock);
		1184	UNLOCK (wrklock);
		1185	}
		1186
		1187	static void atfork_child (void)
		1188	{
		1189	aio_req prv;
		1190
		1191	while (prv = reqq_shift (&req_queue))
		1192	req_free (prv);
		1193
		1194	while (prv = reqq_shift (&res_queue))
		1195	req_free (prv);
		1196
		1197	while (wrk_first.next != &wrk_first)
		1198	{
		1199	worker *wrk = wrk_first.next;
		1200
		1201	if (wrk->req)
		1202	req_free (wrk->req);
		1203
		1204	worker_clear (wrk);
		1205	worker_free (wrk);
		1206	}
		1207
		1208	started = 0;
		1209	idle = 0;
		1210	nreqs = 0;
		1211	nready = 0;
		1212	npending = 0;
		1213
		1214	close (respipe [0]);
		1215	close (respipe [1]);
		1216	create_pipe ();
		1217
		1218	atfork_parent ();
472	}	1219	}
473		1220
474	#define dREQ \	1221	#define dREQ \
475	aio_req req; \	1222	aio_req req; \
		1223	int req_pri = next_pri; \
		1224	next_pri = DEFAULT_PRI + PRI_BIAS; \
476	\	1225	\
477	if (SvOK (callback) && !SvROK (callback)) \	1226	if (SvOK (callback) && !SvROK (callback)) \
478	croak ("clalback must be undef or of reference type"); \	1227	croak ("callback must be undef or of reference type"); \
479	\	1228	\
480	Newz (0, req, 1, aio_cb); \	1229	Newz (0, req, 1, aio_cb); \
481	if (!req) \	1230	if (!req) \
482	croak ("out of memory during aio_req allocation"); \	1231	croak ("out of memory during aio_req allocation"); \
483	\	1232	\
484	req->callback = SvREFCNT_inc (callback);	1233	req->callback = newSVsv (callback); \
		1234	req->pri = req_pri
		1235
		1236	#define REQ_SEND \
		1237	req_send (req); \
		1238	\
		1239	if (GIMME_V != G_VOID) \
		1240	XPUSHs (req_sv (req, AIO_REQ_KLASS));
485		1241
486	MODULE = IO::AIO PACKAGE = IO::AIO	1242	MODULE = IO::AIO PACKAGE = IO::AIO
487		1243
488	PROTOTYPES: ENABLE	1244	PROTOTYPES: ENABLE
489		1245
490	BOOT:	1246	BOOT:
491	{	1247	{
492	if (pipe (respipe))	1248	HV *stash = gv_stashpv ("IO::AIO", 1);
493	croak ("unable to initialize result pipe");
494		1249
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
496	croak ("cannot set result pipe to nonblocking mode");	1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
497		1256
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1257	create_pipe ();
499	croak ("cannot set result pipe to nonblocking mode");
500
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502	}	1259	}
503		1260
504	void	1261	void
505	min_parallel(nthreads)	1262	max_poll_reqs (int nreqs)
506	int nthreads
507	PROTOTYPE: $	1263	PROTOTYPE: $
		1264	CODE:
		1265	max_poll_reqs = nreqs;
508		1266
509	void	1267	void
510	max_parallel(nthreads)	1268	max_poll_time (double nseconds)
511	int nthreads
512	PROTOTYPE: $	1269	PROTOTYPE: $
		1270	CODE:
		1271	max_poll_time = nseconds * AIO_TICKS;
		1272
		1273	void
		1274	min_parallel (int nthreads)
		1275	PROTOTYPE: $
		1276
		1277	void
		1278	max_parallel (int nthreads)
		1279	PROTOTYPE: $
		1280
		1281	void
		1282	max_idle (int nthreads)
		1283	PROTOTYPE: $
		1284	CODE:
		1285	set_max_idle (nthreads);
513		1286
514	int	1287	int
515	max_outstanding(nreqs)	1288	max_outstanding (int maxreqs)
516	int nreqs	1289	PROTOTYPE: $
517	PROTOTYPE: $
518	CODE:	1290	CODE:
519	RETVAL = max_outstanding;	1291	RETVAL = max_outstanding;
520	max_outstanding = nreqs;	1292	max_outstanding = maxreqs;
		1293	OUTPUT:
		1294	RETVAL
521		1295
522	void	1296	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524	SV * pathname	1298	SV * pathname
525	int flags	1299	int flags
526	int mode	1300	int mode
527	SV * callback	1301	SV * callback
528	PROTOTYPE: $$$;$	1302	PROTOTYPE: $$$;$
529	CODE:	1303	PPCODE:
530	{	1304	{
531	dREQ;	1305	dREQ;
532		1306
533	req->type = REQ_OPEN;	1307	req->type = REQ_OPEN;
534	req->data = newSVsv (pathname);	1308	req->data = newSVsv (pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);	1309	req->dataptr = SvPVbyte_nolen (req->data);
536	req->fd = flags;	1310	req->fd = flags;
537	req->mode = mode;	1311	req->mode = mode;
538		1312
539	send_req (req);	1313	REQ_SEND;
540	}	1314	}
541		1315
542	void	1316	void
543	aio_close(fh,callback=&PL_sv_undef)	1317	aio_close (fh,callback=&PL_sv_undef)
544	SV * fh	1318	SV * fh
545	SV * callback	1319	SV * callback
546	PROTOTYPE: $;$	1320	PROTOTYPE: $;$
547	ALIAS:	1321	ALIAS:
548	aio_close = REQ_CLOSE	1322	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	1323	aio_fsync = REQ_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	1324	aio_fdatasync = REQ_FDATASYNC
551	CODE:	1325	PPCODE:
552	{	1326	{
553	dREQ;	1327	dREQ;
554		1328
555	req->type = ix;	1329	req->type = ix;
556	req->fh = newSVsv (fh);	1330	req->fh = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
558		1332
559	send_req (req);	1333	REQ_SEND (req);
560	}	1334	}
561		1335
562	void	1336	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1337	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564	SV * fh	1338	SV * fh
565	UV offset	1339	UV offset
566	IV length	1340	UV length
567	SV * data	1341	SV * data
568	IV dataoffset	1342	UV dataoffset
569	SV * callback	1343	SV * callback
570	ALIAS:	1344	ALIAS:
571	aio_read = REQ_READ	1345	aio_read = REQ_READ
572	aio_write = REQ_WRITE	1346	aio_write = REQ_WRITE
573	PROTOTYPE: $$$$$;$	1347	PROTOTYPE: $$$$$;$
574	CODE:	1348	PPCODE:
575	{	1349	{
576	aio_req req;	1350	aio_req req;
577	STRLEN svlen;	1351	STRLEN svlen;
578	char *svptr = SvPVbyte (data, svlen);	1352	char *svptr = SvPVbyte (data, svlen);
579		1353
…		…
610	: IoOFP (sv_2io (fh)));	1384	: IoOFP (sv_2io (fh)));
611	req->offset = offset;	1385	req->offset = offset;
612	req->length = length;	1386	req->length = length;
613	req->data = SvREFCNT_inc (data);	1387	req->data = SvREFCNT_inc (data);
614	req->dataptr = (char *)svptr + dataoffset;	1388	req->dataptr = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);
616		1389
617	send_req (req);	1390	if (!SvREADONLY (data))
		1391	{
		1392	SvREADONLY_on (data);
		1393	req->data2ptr = (void *)data;
		1394	}
		1395
		1396	REQ_SEND;
618	}	1397	}
619	}	1398	}
620		1399
621	void	1400	void
		1401	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1402	SV * out_fh
		1403	SV * in_fh
		1404	UV in_offset
		1405	UV length
		1406	SV * callback
		1407	PROTOTYPE: $$$$;$
		1408	PPCODE:
		1409	{
		1410	dREQ;
		1411
		1412	req->type = REQ_SENDFILE;
		1413	req->fh = newSVsv (out_fh);
		1414	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1415	req->fh2 = newSVsv (in_fh);
		1416	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1417	req->offset = in_offset;
		1418	req->length = length;
		1419
		1420	REQ_SEND;
		1421	}
		1422
		1423	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1424	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623	SV * fh	1425	SV * fh
624	UV offset	1426	UV offset
625	IV length	1427	IV length
626	SV * callback	1428	SV * callback
627	PROTOTYPE: $$$;$	1429	PROTOTYPE: $$$;$
628	CODE:	1430	PPCODE:
629	{	1431	{
630	dREQ;	1432	dREQ;
631		1433
632	req->type = REQ_READAHEAD;	1434	req->type = REQ_READAHEAD;
633	req->fh = newSVsv (fh);	1435	req->fh = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1436	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635	req->offset = offset;	1437	req->offset = offset;
636	req->length = length;	1438	req->length = length;
637		1439
638	send_req (req);	1440	REQ_SEND;
639	}	1441	}
640		1442
641	void	1443	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)	1444	aio_stat (fh_or_path,callback=&PL_sv_undef)
643	SV * fh_or_path	1445	SV * fh_or_path
644	SV * callback	1446	SV * callback
645	ALIAS:	1447	ALIAS:
646	aio_stat = REQ_STAT	1448	aio_stat = REQ_STAT
647	aio_lstat = REQ_LSTAT	1449	aio_lstat = REQ_LSTAT
648	CODE:	1450	PPCODE:
649	{	1451	{
650	dREQ;	1452	dREQ;
651		1453
652	New (0, req->statdata, 1, Stat_t);	1454	New (0, req->statdata, 1, Stat_t);
653	if (!req->statdata)	1455	if (!req->statdata)
		1456	{
		1457	req_free (req);
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1458	croak ("out of memory during aio_req->statdata allocation");
		1459	}
655		1460
656	if (SvPOK (fh_or_path))	1461	if (SvPOK (fh_or_path))
657	{	1462	{
658	req->type = ix;	1463	req->type = ix;
659	req->data = newSVsv (fh_or_path);	1464	req->data = newSVsv (fh_or_path);
…		…
664	req->type = REQ_FSTAT;	1469	req->type = REQ_FSTAT;
665	req->fh = newSVsv (fh_or_path);	1470	req->fh = newSVsv (fh_or_path);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1471	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667	}	1472	}
668		1473
669	send_req (req);	1474	REQ_SEND;
670	}	1475	}
671		1476
672	void	1477	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	1478	aio_unlink (pathname,callback=&PL_sv_undef)
674	SV * pathname	1479	SV * pathname
675	SV * callback	1480	SV * callback
676	ALIAS:	1481	ALIAS:
677	aio_unlink = REQ_UNLINK	1482	aio_unlink = REQ_UNLINK
678	aio_rmdir = REQ_RMDIR	1483	aio_rmdir = REQ_RMDIR
		1484	aio_readdir = REQ_READDIR
679	CODE:	1485	PPCODE:
680	{	1486	{
681	dREQ;	1487	dREQ;
682		1488
683	req->type = ix;	1489	req->type = ix;
684	req->data = newSVsv (pathname);	1490	req->data = newSVsv (pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);	1491	req->dataptr = SvPVbyte_nolen (req->data);
686		1492
687	send_req (req);	1493	REQ_SEND;
688	}	1494	}
689		1495
690	void	1496	void
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1497	aio_link (oldpath,newpath,callback=&PL_sv_undef)
692	SV * oldpath	1498	SV * oldpath
693	SV * newpath	1499	SV * newpath
694	SV * callback	1500	SV * callback
		1501	ALIAS:
		1502	aio_link = REQ_LINK
		1503	aio_symlink = REQ_SYMLINK
		1504	aio_rename = REQ_RENAME
695	CODE:	1505	PPCODE:
696	{	1506	{
697	dREQ;	1507	dREQ;
698		1508
699	req->type = REQ_SYMLINK;	1509	req->type = ix;
700	req->fh = newSVsv (oldpath);	1510	req->fh = newSVsv (oldpath);
701	req->data2ptr = SvPVbyte_nolen (req->fh);	1511	req->data2ptr = SvPVbyte_nolen (req->fh);
702	req->data = newSVsv (newpath);	1512	req->data = newSVsv (newpath);
703	req->dataptr = SvPVbyte_nolen (req->data);	1513	req->dataptr = SvPVbyte_nolen (req->data);
704		1514
705	send_req (req);	1515	REQ_SEND;
706	}	1516	}
707		1517
708	void	1518	void
		1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1520	SV * pathname
		1521	SV * callback
		1522	UV mode
		1523	UV dev
		1524	PPCODE:
		1525	{
		1526	dREQ;
		1527
		1528	req->type = REQ_MKNOD;
		1529	req->data = newSVsv (pathname);
		1530	req->dataptr = SvPVbyte_nolen (req->data);
		1531	req->mode = (mode_t)mode;
		1532	req->offset = dev;
		1533
		1534	REQ_SEND;
		1535	}
		1536
		1537	void
		1538	aio_busy (delay,callback=&PL_sv_undef)
		1539	double delay
		1540	SV * callback
		1541	PPCODE:
		1542	{
		1543	dREQ;
		1544
		1545	req->type = REQ_BUSY;
		1546	req->fd = delay < 0. ? 0 : delay;
		1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1548
		1549	REQ_SEND;
		1550	}
		1551
		1552	void
		1553	aio_group (callback=&PL_sv_undef)
		1554	SV * callback
		1555	PROTOTYPE: ;$
		1556	PPCODE:
		1557	{
		1558	dREQ;
		1559
		1560	req->type = REQ_GROUP;
		1561	req_send (req);
		1562
		1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1564	}
		1565
		1566	void
		1567	aio_nop (callback=&PL_sv_undef)
		1568	SV * callback
		1569	PPCODE:
		1570	{
		1571	dREQ;
		1572
		1573	req->type = REQ_NOP;
		1574
		1575	REQ_SEND;
		1576	}
		1577
		1578	int
		1579	aioreq_pri (int pri = 0)
		1580	PROTOTYPE: ;$
		1581	CODE:
		1582	RETVAL = next_pri - PRI_BIAS;
		1583	if (items > 0)
		1584	{
		1585	if (pri < PRI_MIN) pri = PRI_MIN;
		1586	if (pri > PRI_MAX) pri = PRI_MAX;
		1587	next_pri = pri + PRI_BIAS;
		1588	}
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	aioreq_nice (int nice = 0)
		1594	CODE:
		1595	nice = next_pri - nice;
		1596	if (nice < PRI_MIN) nice = PRI_MIN;
		1597	if (nice > PRI_MAX) nice = PRI_MAX;
		1598	next_pri = nice + PRI_BIAS;
		1599
		1600	void
709	flush()	1601	flush ()
710	PROTOTYPE:	1602	PROTOTYPE:
711	CODE:	1603	CODE:
712	while (nreqs)	1604	while (nreqs)
713	{	1605	{
714	poll_wait ();	1606	poll_wait ();
715	poll_cb ();	1607	poll_cb (0);
716	}	1608	}
717		1609
718	void	1610	void
719	poll()	1611	poll()
720	PROTOTYPE:	1612	PROTOTYPE:
721	CODE:	1613	CODE:
722	if (nreqs)	1614	if (nreqs)
723	{	1615	{
724	poll_wait ();	1616	poll_wait ();
725	poll_cb ();	1617	poll_cb (0);
726	}	1618	}
727		1619
728	int	1620	int
729	poll_fileno()	1621	poll_fileno()
730	PROTOTYPE:	1622	PROTOTYPE:
…		…
754	CODE:	1646	CODE:
755	RETVAL = nreqs;	1647	RETVAL = nreqs;
756	OUTPUT:	1648	OUTPUT:
757	RETVAL	1649	RETVAL
758		1650
		1651	int
		1652	nready()
		1653	PROTOTYPE:
		1654	CODE:
		1655	RETVAL = get_nready ();
		1656	OUTPUT:
		1657	RETVAL
		1658
		1659	int
		1660	npending()
		1661	PROTOTYPE:
		1662	CODE:
		1663	RETVAL = get_npending ();
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	nthreads()
		1669	PROTOTYPE:
		1670	CODE:
		1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1672	RETVAL = started;
		1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	PROTOTYPES: DISABLE
		1678
		1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1680
		1681	void
		1682	cancel (aio_req_ornot req)
		1683	CODE:
		1684	req_cancel (req);
		1685
		1686	void
		1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1688	CODE:
		1689	SvREFCNT_dec (req->callback);
		1690	req->callback = newSVsv (callback);
		1691
		1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1693
		1694	void
		1695	add (aio_req grp, ...)
		1696	PPCODE:
		1697	{
		1698	int i;
		1699	aio_req req;
		1700
		1701	if (grp->fd == 2)
		1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1703
		1704	for (i = 1; i < items; ++i )
		1705	{
		1706	if (GIMME_V != G_VOID)
		1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1708
		1709	req = SvAIO_REQ (ST (i));
		1710
		1711	if (req)
		1712	{
		1713	++grp->length;
		1714	req->grp = grp;
		1715
		1716	req->grp_prev = 0;
		1717	req->grp_next = grp->grp_first;
		1718
		1719	if (grp->grp_first)
		1720	grp->grp_first->grp_prev = req;
		1721
		1722	grp->grp_first = req;
		1723	}
		1724	}
		1725	}
		1726
		1727	void
		1728	cancel_subs (aio_req_ornot req)
		1729	CODE:
		1730	req_cancel_subs (req);
		1731
		1732	void
		1733	result (aio_req grp, ...)
		1734	CODE:
		1735	{
		1736	int i;
		1737	AV *av;
		1738
		1739	grp->errorno = errno;
		1740
		1741	av = newAV ();
		1742
		1743	for (i = 1; i < items; ++i )
		1744	av_push (av, newSVsv (ST (i)));
		1745
		1746	SvREFCNT_dec (grp->data);
		1747	grp->data = (SV *)av;
		1748	}
		1749
		1750	void
		1751	errno (aio_req grp, int errorno = errno)
		1752	CODE:
		1753	grp->errorno = errorno;
		1754
		1755	void
		1756	limit (aio_req grp, int limit)
		1757	CODE:
		1758	grp->fd2 = limit;
		1759	aio_grp_feed (grp);
		1760
		1761	void
		1762	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1763	CODE:
		1764	{
		1765	SvREFCNT_dec (grp->fh2);
		1766	grp->fh2 = newSVsv (callback);
		1767
		1768	if (grp->fd2 <= 0)
		1769	grp->fd2 = 2;
		1770
		1771	aio_grp_feed (grp);
		1772	}
		1773

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