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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.82 by root, Fri Oct 27 20:11:58 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"
…		…
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
13	#include <errno.h>	22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
14	#include <sys/types.h>	25	#include <sys/types.h>
15	#include <sys/stat.h>	26	#include <sys/stat.h>
16	#include <limits.h>	27	#include <limits.h>
17	#include <unistd.h>	28	#include <unistd.h>
18	#include <fcntl.h>	29	#include <fcntl.h>
…		…
37	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	49	#ifndef NAME_MAX
39	# define NAME_MAX 4096	50	# define NAME_MAX 4096
40	#endif	51	#endif
41		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
42	#if __ia64	58	#if __ia64
43	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	62	#else
45	# define STACKSIZE 8192	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
46	#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;
47		88
48	enum {	89	enum {
49	REQ_QUIT,	90	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,	93	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
58	};	101	};
59		102
60	#define AIO_CB_KLASS "IO::AIO::CB"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
61		105
62	typedef struct aio_cb	106	typedef struct aio_cb
63	{	107	{
64	struct aio_cb *grp_prev, *grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
68
69	SV *self; /* the perl counterpart of this request, if any */
70		109
71	SV *data, *callback;	110	SV *data, *callback;
72	SV *fh, *fh2;	111	SV *fh, *fh2;
73	void *dataptr, *data2ptr;	112	void *dataptr, *data2ptr;
74	Stat_t *statdata;	113	Stat_t *statdata;
75	off_t offset;	114	off_t offset;
76	size_t length;	115	size_t length;
77	ssize_t result;	116	ssize_t result;
78		117
		118	STRLEN dataoffset;
79	int type;	119	int type;
80	int fd, fd2;	120	int fd, fd2;
81	int errorno;	121	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */	122	mode_t mode; /* open */
		123
84	unsigned char cancelled;	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;
85	} aio_cb;	129	} aio_cb;
		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
86		134
87	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
88	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
89		137
		138	enum {
		139	PRI_MIN = -4,
		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
90	static int started, wanted;	149	static unsigned int started, wanted;
91	static volatile int nreqs;	150
92	static int max_outstanding = 1<<30;	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;
93	static int respipe [2];	202	static int respipe [2];
94		203
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98		207
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
100	static volatile aio_req ress, rese; /* queue start, queue end */
101		209
		210	static unsigned int get_nready ()
		211	{
		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	*/
102	typedef struct aio_grp	244	typedef struct {
103	{	245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
104	struct aio_cb *first, *last;	246	int size;
105	SV *callback;	247	} reqq;
106	int busycount;
107	} aio_grp;
108		248
109	static void aio_grp_begin (aio_grp *grp)	249	static reqq req_queue;
110	{	250	static reqq res_queue;
111	++grp->busycount;
112	}
113		251
114	static void aio_grp_end (aio_grp *grp)	252	int reqq_push (reqq *q, aio_req req)
115	{	253	{
116	--grp->busycount;	254	int pri = req->pri;
		255	req->next = 0;
117		256
118	if (grp->busycount)	257	if (q->qe[pri])
		258	{
		259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
		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)
119	return;	273	return 0;
120		274
121	SvREFCNT_dec (grp->callback);	275	--q->size;
122	grp->callback = 0;
123	}
124		276
125	static aio_grp *aio_grp_new ()	277	for (pri = NUM_PRI; pri--; )
126	{	278	{
127	aio_grp *grp;	279	aio_req req = q->qs[pri];
128		280
129	Newz (0, grp, 1, aio_grp);	281	if (req)
130	aio_grp_begin (grp);	282	{
		283	if (!(q->qs[pri] = req->next))
		284	q->qe[pri] = 0;
131		285
132	return grp;	286	return req;
		287	}
		288	}
		289
		290	abort ();
133	}	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);
134		297
135	/* must be called at most once */	298	/* must be called at most once */
136	static SV *req_sv (aio_req req)	299	static SV *req_sv (aio_req req, const char *klass)
137	{	300	{
		301	if (!req->self)
		302	{
138	req->self = (SV *)newHV ();	303	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
140		306
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142	}	308	}
143		309
144	static aio_req SvAIO_REQ (SV *sv)	310	static aio_req SvAIO_REQ (SV *sv)
145	{	311	{
		312	MAGIC *mg;
		313
146	if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))	314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
147	croak ("object of class " AIO_CB_KLASS " expected");	315	croak ("object of class " AIO_REQ_KLASS " expected");
148		316
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		318
151	return mg ? (aio_req)mg->mg_ptr : 0;	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	}
152	}	477	}
153		478
154	static void req_free (aio_req req)	479	static void req_free (aio_req req)
155	{	480	{
156	if (req->self)	481	if (req->self)
157	{	482	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
160	}	485	}
161		486
162	if (req->data)
163	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
176		492
177	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
178	free (req->data2ptr);	494	free (req->data2ptr);
179		495
180	Safefree (req);	496	Safefree (req);
181	}	497	}
182		498
183	static void	499	static void req_cancel_subs (aio_req grp)
184	poll_wait ()
185	{	500	{
186	if (nreqs && !ress)	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;
187	{	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	{
188	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
189	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
191		655
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}	657	}
194	}	658	}
195		659
196	static int	660	static int poll_cb (int max)
197	poll_cb ()
198	{	661	{
199	dSP;	662	dSP;
200	int count = 0;	663	int count = 0;
201	int do_croak = 0;	664	int do_croak = 0;
202	aio_req req;	665	aio_req req;
203		666
204	for (;;)	667	for (;;)
205	{	668	{
206	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
207	req = ress;
208
209	if (req)
210	{	670	{
211	ress = req->next;	671	maybe_start_thread ();
212		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
213	if (!ress)	676	if (req)
214	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
215	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
216	char buf [32];	683	char buf [32];
217	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
218	;	686	}
219
220	rese = 0;
221	}	687	}
222	}
223		688
224	pthread_mutex_unlock (&reslock);	689	UNLOCK (reslock);
225		690
226	if (!req)	691	if (!req)
227	break;	692	break;
228		693
229	nreqs--;	694	--nreqs;
230		695
231	if (req->type == REQ_QUIT)
232	started--;
233	else
234	{
235	int errorno = errno;
236	errno = req->errorno;
237
238	if (req->type == REQ_READ)	696	if (req->type == REQ_GROUP && req->length)
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240
241	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);
243
244	if (req->statdata)
245	{	697	{
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	698	req->fd = 1; /* mark request as delayed */
247	PL_laststatval = req->result;	699	continue;
248	PL_statcache = *(req->statdata);
249	}
250
251	ENTER;
252	PUSHMARK (SP);
253
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}	700	}
277	else	701	else
278	{	702	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));
280
281	if (req->type == REQ_OPEN)	703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
282	{	710	{
283	/* convert fd to fh */	711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
284	SV *fh;	712	PL_laststatval = req->result;
285		713	PL_statcache = *(req->statdata);
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}	714	}
		715
		716	req_invoke (req);
		717
		718	count++;
295	}	719	}
296		720
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID | G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);	721	req_free (req);
306	croak (0);
307	}
308	}
309
310	LEAVE;
311
312	errno = errorno;
313	count++;
314	}	722	}
315		723
316	req_free (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
317	}	730	}
318		731
319	return count;	732	return count;
320	}
321
322	static void *aio_proc(void *arg);
323
324	static void
325	start_thread (void)
326	{
327	sigset_t fullsigset, oldsigset;
328	pthread_t tid;
329	pthread_attr_t attr;
330
331	pthread_attr_init (&attr);
332	pthread_attr_setstacksize (&attr, STACKSIZE);
333	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334
335	sigfillset (&fullsigset);
336	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337
338	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
339	started++;
340
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);
342	}
343
344	static void
345	req_send (aio_req req)
346	{
347	while (started < wanted && nreqs >= started)
348	start_thread ();
349
350	nreqs++;
351
352	pthread_mutex_lock (&reqlock);
353
354	req->next = 0;
355
356	if (reqe)
357	{
358	reqe->next = req;
359	reqe = req;
360	}
361	else
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);
366
367	if (nreqs > max_outstanding)
368	for (;;)
369	{
370	poll_cb ();
371
372	if (nreqs <= max_outstanding)
373	break;
374
375	poll_wait ();
376	}
377	}
378
379	static void
380	end_thread (void)
381	{
382	aio_req req;
383	Newz (0, req, 1, aio_cb);
384	req->type = REQ_QUIT;
385
386	req_send (req);
387	}
388
389	static void min_parallel (int nthreads)
390	{
391	if (wanted < nthreads)
392	wanted = nthreads;
393	}
394
395	static void max_parallel (int nthreads)
396	{
397	int cur = started;
398
399	if (wanted > nthreads)
400	wanted = nthreads;
401
402	while (cur > wanted)
403	{
404	end_thread ();
405	cur--;
406	}
407
408	while (started > wanted)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}	733	}
414		734
415	static void create_pipe ()	735	static void create_pipe ()
416	{	736	{
417	if (pipe (respipe))	737	if (pipe (respipe))
…		…
436	* 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,
437	* but that's your problem, not mine.	757	* but that's your problem, not mine.
438	*/	758	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440		760
441	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{	762	{
444	ssize_t res;	763	ssize_t res;
445	off_t ooffset;	764	off_t ooffset;
446		765
447	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);	769	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
453		772
454	return res;	773	return res;
455	}	774	}
456		775
457	static ssize_t
458	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)
459	{	777	{
460	ssize_t res;	778	ssize_t res;
461	off_t ooffset;	779	off_t ooffset;
462		780
463	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);	784	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
469		787
470	return res;	788	return res;
471	}	789	}
472	#endif	790	#endif
473		791
474	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
475	# define fdatasync fsync	793	# define fdatasync fsync
476	#endif	794	#endif
477		795
478	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
479	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
480		798
481	static ssize_t	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
482	readahead (int fd, off_t offset, size_t count)
483	{	800	{
484	char readahead_buf[4096];	801	dBUF;
485		802
486	while (count > 0)	803	while (count > 0)
487	{	804	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
489		806
490	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
491	offset += len;	808	offset += len;
492	count -= len;	809	count -= len;
493	}	810	}
494		811
495	errno = 0;	812	errno = 0;
496	}	813	}
		814
497	#endif	815	#endif
498		816
499	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
501		819
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503		821
504	static int
505	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506	{	823	{
507	struct dirent *e;	824	struct dirent *e;
508	int errorno;	825	int errorno;
509		826
510	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
511		828
512	e = readdir (dirp);	829	e = readdir (dirp);
513	errorno = errno;	830	errorno = errno;
514		831
515	if (e)	832	if (e)
…		…
518	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
519	}	836	}
520	else	837	else
521	*res = 0;	838	*res = 0;
522		839
523	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
524		841
525	errno = errorno;	842	errno = errorno;
526	return e ? 0 : -1;	843	return e ? 0 : -1;
527	}	844	}
528	#endif	845	#endif
529		846
530	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
531	static ssize_t
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
533	{	849	{
534	ssize_t res;	850	ssize_t res;
535		851
536	if (!count)	852	if (!count)
537	return 0;	853	return 0;
…		…
548	{	864	{
549	off_t sbytes;	865	off_t sbytes;
550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551		867
552	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
554	res = sbytes;	870	res = sbytes;
555	}	871	}
556		872
557	# elif __hpux	873	# elif __hpux
558	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
586	#endif	902	#endif
587	)	903	)
588	)	904	)
589	{	905	{
590	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];	907	dBUF;
		908
592	res = 0;	909	res = 0;
593		910
594	while (count)	911	while (count)
595	{	912	{
596	ssize_t cnt;	913	ssize_t cnt;
597		914
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
599		916
600	if (cnt <= 0)	917	if (cnt <= 0)
601	{	918	{
602	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
603	break;	920	break;
604	}	921	}
605		922
606	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
607		924
608	if (cnt <= 0)	925	if (cnt <= 0)
609	{	926	{
610	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
611	break;	928	break;
…		…
619		936
620	return res;	937	return res;
621	}	938	}
622		939
623	/* read a full directory */	940	/* read a full directory */
624	static int	941	static void scandir_ (aio_req req, worker *self)
625	scandir_ (const char *path, void **namesp)
626	{	942	{
627	DIR *dirp = opendir (path);	943	DIR *dirp;
628	union	944	union
629	{	945	{
630	struct dirent d;	946	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;	948	} *u;
633	struct dirent *entp;	949	struct dirent *entp;
634	char *name, *names;	950	char *name, *names;
635	int memlen = 4096;	951	int memlen = 4096;
636	int memofs = 0;	952	int memofs = 0;
637	int res = 0;	953	int res = 0;
638	int errorno;	954	int errorno;
639		955
640	if (!dirp)	956	LOCK (wrklock);
641	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
642		958	self->dbuf = u = malloc (sizeof (*u));
643	names = malloc (memlen);	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	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	static void *aio_proc (void *thr_arg)
		1004	{
		1005	aio_req req;
		1006	worker *self = (worker *)thr_arg;
644		1007
645	for (;;)	1008	for (;;)
646	{	1009	{
647	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
648
649	if (!entp)
650	break;
651
652	name = entp->d_name;
653
654	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655	{
656	int len = strlen (name) + 1;
657
658	res++;
659
660	while (memofs + len > memlen)
661	{
662	memlen *= 2;
663	names = realloc (names, memlen);
664	if (!names)
665	break;
666	}
667
668	memcpy (names + memofs, name, len);
669	memofs += len;
670	}
671	}
672
673	errorno = errno;
674	closedir (dirp);
675
676	if (errorno)
677	{
678	free (names);
679	errno = errorno;
680	res = -1;
681	}
682
683	*namesp = (void *)names;
684	return res;
685	}
686
687	/*****************************************************************************/
688
689	static void *
690	aio_proc (void *thr_arg)
691	{
692	aio_req req;
693	int type;
694
695	do
696	{
697	pthread_mutex_lock (&reqlock);
698		1011
699	for (;;)	1012	for (;;)
700	{	1013	{
701	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708		1015
709	if (req)	1016	if (req)
710	break;	1017	break;
711		1018
712	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
713	}	1020	}
714		1021
715	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
716		1025
717	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
718		1027
719	if (!req->cancelled)	1028	if (!(req->flags & FLAG_CANCELLED))
720	switch (req->type)	1029	switch (req->type)
721	{	1030	{
722	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;
723	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;
724		1033
725	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;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
727		1036
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
731		1040
…		…
734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
738	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;
739		1049
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
		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;
743		1067
744	case REQ_QUIT:	1068	case REQ_QUIT:
		1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
745	break;	1073	return 0;
746		1074
747	default:	1075	default:
748	req->result = ENOSYS;	1076	req->result = ENOSYS;
749	break;	1077	break;
750	}	1078	}
751		1079
752	req->errorno = errno;	1080	req->errorno = errno;
753		1081
754	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
755		1083
756	req->next = 0;	1084	++npending;
757		1085
758	if (rese)	1086	if (!reqq_push (&res_queue, req))
759	{
760	rese->next = req;
761	rese = req;
762	}
763	else
764	{
765	rese = ress = req;
766
767	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
769	}
770		1089
771	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
772	}	1091	worker_clear (self);
773	while (type != REQ_QUIT);
774		1092
775	return 0;	1093	UNLOCK (reslock);
		1094	}
776	}	1095	}
777		1096
778	/*****************************************************************************/	1097	/*****************************************************************************/
779		1098
780	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
781	{	1100	{
782	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
783	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
784	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
786	#endif	1106	#endif
787	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
789	#endif	1109	#endif
790	}	1110	}
791		1111
792	static void atfork_parent (void)	1112	static void atfork_parent (void)
793	{	1113	{
794	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
795	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
796	#endif	1116	#endif
797	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
799	#endif	1119	#endif
800	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
801	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
802	}	1123	}
803		1124
804	static void atfork_child (void)	1125	static void atfork_child (void)
805	{	1126	{
806	aio_req prv;	1127	aio_req prv;
807		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)
		1136	{
		1137	worker *wrk = wrk_first.next;
		1138
		1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
808	started = 0;	1146	started = 0;
809		1147	nreqs = 0;
810	while (reqs)
811	{
812	prv = reqs;
813	reqs = prv->next;
814	req_free (prv);
815	}
816
817	reqs = reqe = 0;
818
819	while (ress)
820	{
821	prv = ress;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827		1148
828	close (respipe [0]);	1149	close (respipe [0]);
829	close (respipe [1]);	1150	close (respipe [1]);
830	create_pipe ();	1151	create_pipe ();
831		1152
832	atfork_parent ();	1153	atfork_parent ();
833	}	1154	}
834		1155
835	#define dREQ \	1156	#define dREQ \
836	aio_req req; \	1157	aio_req req; \
		1158	int req_pri = next_pri; \
		1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
837	\	1160	\
838	if (SvOK (callback) && !SvROK (callback)) \	1161	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \	1162	croak ("callback must be undef or of reference type"); \
840	\	1163	\
841	Newz (0, req, 1, aio_cb); \	1164	Newz (0, req, 1, aio_cb); \
842	if (!req) \	1165	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	1166	croak ("out of memory during aio_req allocation"); \
844	\	1167	\
845	req->callback = newSVsv (callback)	1168	req->callback = newSVsv (callback); \
		1169	req->pri = req_pri
846		1170
847	#define REQ_SEND \	1171	#define REQ_SEND \
848	req_send (req); \	1172	req_send (req); \
849	\	1173	\
850	if (GIMME_V != G_VOID) \	1174	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));
852		1176
853	MODULE = IO::AIO PACKAGE = IO::AIO	1177	MODULE = IO::AIO PACKAGE = IO::AIO
854		1178
855	PROTOTYPES: ENABLE	1179	PROTOTYPES: ENABLE
856		1180
857	BOOT:	1181	BOOT:
858	{	1182	{
859	HV *stash = gv_stashpv ("IO::AIO", 1);	1183	HV *stash = gv_stashpv ("IO::AIO", 1);
		1184
860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1185	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1186	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1187	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1188	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1189	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1190	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
863		1191
864	create_pipe ();	1192	create_pipe ();
865	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1193	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
866	}
867		1194
		1195	start_thread ();
		1196	}
		1197
868	void	1198	void
869	min_parallel (nthreads)	1199	min_parallel (int nthreads)
870	int nthreads
871	PROTOTYPE: $	1200	PROTOTYPE: $
872		1201
873	void	1202	void
874	max_parallel (nthreads)	1203	max_parallel (int nthreads)
875	int nthreads
876	PROTOTYPE: $	1204	PROTOTYPE: $
877		1205
878	int	1206	int
879	max_outstanding (nreqs)	1207	max_outstanding (int maxreqs)
880	int nreqs	1208	PROTOTYPE: $
881	PROTOTYPE: $
882	CODE:	1209	CODE:
883	RETVAL = max_outstanding;	1210	RETVAL = max_outstanding;
884	max_outstanding = nreqs;	1211	max_outstanding = maxreqs;
		1212	OUTPUT:
		1213	RETVAL
885		1214
886	void	1215	void
887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1216	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
888	SV * pathname	1217	SV * pathname
889	int flags	1218	int flags
…		…
1103	req->dataptr = SvPVbyte_nolen (req->data);	1432	req->dataptr = SvPVbyte_nolen (req->data);
1104		1433
1105	REQ_SEND;	1434	REQ_SEND;
1106	}	1435	}
1107		1436
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1437	void
1112	cancel_most_requests ()	1438	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1439	SV * pathname
		1440	SV * callback
		1441	UV mode
		1442	UV dev
		1443	PPCODE:
		1444	{
		1445	dREQ;
		1446
		1447	req->type = REQ_MKNOD;
		1448	req->data = newSVsv (pathname);
		1449	req->dataptr = SvPVbyte_nolen (req->data);
		1450	req->mode = (mode_t)mode;
		1451	req->offset = dev;
		1452
		1453	REQ_SEND;
		1454	}
		1455
		1456	void
		1457	aio_busy (delay,callback=&PL_sv_undef)
		1458	double delay
		1459	SV * callback
		1460	PPCODE:
		1461	{
		1462	dREQ;
		1463
		1464	req->type = REQ_BUSY;
		1465	req->fd = delay < 0. ? 0 : delay;
		1466	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1467
		1468	REQ_SEND;
		1469	}
		1470
		1471	void
		1472	aio_group (callback=&PL_sv_undef)
		1473	SV * callback
1113	PROTOTYPE:	1474	PROTOTYPE: ;$
1114	CODE:	1475	PPCODE:
1115	{	1476	{
1116	aio_req *req;	1477	dREQ;
1117		1478
1118	pthread_mutex_lock (&reqlock);	1479	req->type = REQ_GROUP;
1119	for (req = reqs; req; req = req->next)	1480	req_send (req);
1120	req->flags |= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1481
1123	pthread_mutex_lock (&reslock);	1482	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1124	for (req = ress; req; req = req->next)
1125	req->flags |= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}	1483	}
1128		1484
1129	#endif	1485	void
		1486	aio_nop (callback=&PL_sv_undef)
		1487	SV * callback
		1488	PPCODE:
		1489	{
		1490	dREQ;
		1491
		1492	req->type = REQ_NOP;
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	int
		1498	aioreq_pri (int pri = 0)
		1499	PROTOTYPE: ;$
		1500	CODE:
		1501	RETVAL = next_pri - PRI_BIAS;
		1502	if (items > 0)
		1503	{
		1504	if (pri < PRI_MIN) pri = PRI_MIN;
		1505	if (pri > PRI_MAX) pri = PRI_MAX;
		1506	next_pri = pri + PRI_BIAS;
		1507	}
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	void
		1512	aioreq_nice (int nice = 0)
		1513	CODE:
		1514	nice = next_pri - nice;
		1515	if (nice < PRI_MIN) nice = PRI_MIN;
		1516	if (nice > PRI_MAX) nice = PRI_MAX;
		1517	next_pri = nice + PRI_BIAS;
1130		1518
1131	void	1519	void
1132	flush ()	1520	flush ()
1133	PROTOTYPE:	1521	PROTOTYPE:
1134	CODE:	1522	CODE:
1135	while (nreqs)	1523	while (nreqs)
1136	{	1524	{
1137	poll_wait ();	1525	poll_wait ();
1138	poll_cb ();	1526	poll_cb (0);
1139	}	1527	}
1140		1528
1141	void	1529	void
1142	poll()	1530	poll()
1143	PROTOTYPE:	1531	PROTOTYPE:
1144	CODE:	1532	CODE:
1145	if (nreqs)	1533	if (nreqs)
1146	{	1534	{
1147	poll_wait ();	1535	poll_wait ();
1148	poll_cb ();	1536	poll_cb (0);
1149	}	1537	}
1150		1538
1151	int	1539	int
1152	poll_fileno()	1540	poll_fileno()
1153	PROTOTYPE:	1541	PROTOTYPE:
…		…
1158		1546
1159	int	1547	int
1160	poll_cb(...)	1548	poll_cb(...)
1161	PROTOTYPE:	1549	PROTOTYPE:
1162	CODE:	1550	CODE:
1163	RETVAL = poll_cb ();	1551	RETVAL = poll_cb (0);
		1552	OUTPUT:
		1553	RETVAL
		1554
		1555	int
		1556	poll_some(int max = 0)
		1557	PROTOTYPE: $
		1558	CODE:
		1559	RETVAL = poll_cb (max);
1164	OUTPUT:	1560	OUTPUT:
1165	RETVAL	1561	RETVAL
1166		1562
1167	void	1563	void
1168	poll_wait()	1564	poll_wait()
…		…
1177	CODE:	1573	CODE:
1178	RETVAL = nreqs;	1574	RETVAL = nreqs;
1179	OUTPUT:	1575	OUTPUT:
1180	RETVAL	1576	RETVAL
1181		1577
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	1578	int
1183		1579	nready()
1184	void
1185	cancel (aio_req_ornot req)
1186	PROTOTYPE:	1580	PROTOTYPE:
1187	CODE:	1581	CODE:
1188	req->cancelled = 1;	1582	RETVAL = get_nready ();
		1583	OUTPUT:
		1584	RETVAL
1189		1585
		1586	int
		1587	npending()
		1588	PROTOTYPE:
		1589	CODE:
		1590	RETVAL = get_npending ();
		1591	OUTPUT:
		1592	RETVAL
		1593
		1594	PROTOTYPES: DISABLE
		1595
		1596	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1597
		1598	void
		1599	cancel (aio_req_ornot req)
		1600	CODE:
		1601	req_cancel (req);
		1602
		1603	void
		1604	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1605	CODE:
		1606	SvREFCNT_dec (req->callback);
		1607	req->callback = newSVsv (callback);
		1608
		1609	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1610
		1611	void
		1612	add (aio_req grp, ...)
		1613	PPCODE:
		1614	{
		1615	int i;
		1616	aio_req req;
		1617
		1618	if (grp->fd == 2)
		1619	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1620
		1621	for (i = 1; i < items; ++i )
		1622	{
		1623	if (GIMME_V != G_VOID)
		1624	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1625
		1626	req = SvAIO_REQ (ST (i));
		1627
		1628	if (req)
		1629	{
		1630	++grp->length;
		1631	req->grp = grp;
		1632
		1633	req->grp_prev = 0;
		1634	req->grp_next = grp->grp_first;
		1635
		1636	if (grp->grp_first)
		1637	grp->grp_first->grp_prev = req;
		1638
		1639	grp->grp_first = req;
		1640	}
		1641	}
		1642	}
		1643
		1644	void
		1645	cancel_subs (aio_req_ornot req)
		1646	CODE:
		1647	req_cancel_subs (req);
		1648
		1649	void
		1650	result (aio_req grp, ...)
		1651	CODE:
		1652	{
		1653	int i;
		1654	AV *av;
		1655
		1656	grp->errorno = errno;
		1657
		1658	av = newAV ();
		1659
		1660	for (i = 1; i < items; ++i )
		1661	av_push (av, newSVsv (ST (i)));
		1662
		1663	SvREFCNT_dec (grp->data);
		1664	grp->data = (SV *)av;
		1665	}
		1666
		1667	void
		1668	errno (aio_req grp, int errorno = errno)
		1669	CODE:
		1670	grp->errorno = errorno;
		1671
		1672	void
		1673	limit (aio_req grp, int limit)
		1674	CODE:
		1675	grp->fd2 = limit;
		1676	aio_grp_feed (grp);
		1677
		1678	void
		1679	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1680	CODE:
		1681	{
		1682	SvREFCNT_dec (grp->fh2);
		1683	grp->fh2 = newSVsv (callback);
		1684
		1685	if (grp->fd2 <= 0)
		1686	grp->fd2 = 2;
		1687
		1688	aio_grp_feed (grp);
		1689	}
		1690

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