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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 1.101 by root, Fri Jun 1 13:25:51 2007 UTC

1	#define _REENTRANT 1	1	#include "xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "autoconf/config.h"
9		10
10	#include <pthread.h>
11
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
14	#include <sys/types.h>	16	#include <sys/types.h>
15	#include <sys/stat.h>	17	#include <sys/stat.h>
16	#include <limits.h>	18	#include <limits.h>
17	#include <unistd.h>	19	#include <unistd.h>
18	#include <fcntl.h>	20	#include <fcntl.h>
19	#include <signal.h>	21	#include <signal.h>
20	#include <sched.h>	22	#include <sched.h>
		23	#include <utime.h>
21		24
22	#if HAVE_SENDFILE	25	#if HAVE_SENDFILE
23	# if __linux	26	# if __linux
24	# include <sys/sendfile.h>	27	# include <sys/sendfile.h>
25	# elif __freebsd	28	# elif __freebsd
…		…
32	# else	35	# else
33	# error sendfile support requested but not available	36	# error sendfile support requested but not available
34	# endif	37	# endif
35	#endif	38	#endif
36		39
		40	/* number of seconds after which idle threads exit */
		41	#define IDLE_TIMEOUT 10
		42
37	/* used for struct dirent, AIX doesn't provide it */	43	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	44	#ifndef NAME_MAX
39	# define NAME_MAX 4096	45	# define NAME_MAX 4096
40	#endif	46	#endif
41		47
42	#if __ia64	48	/* buffer size for various temporary buffers */
43	# define STACKSIZE 65536	49	#define AIO_BUFSIZE 65536
		50
		51	/* use NV for 32 bit perls as it allows larger offsets */
		52	#if IVSIZE >= 8
		53	# define SvVAL64 SvIV
44	#else	54	#else
45	# define STACKSIZE 8192	55	# define SvVAL64 SvNV
46	#endif	56	#endif
		57
		58	#define dBUF \
		59	char *aio_buf; \
		60	LOCK (wrklock); \
		61	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		62	UNLOCK (wrklock); \
		63	if (!aio_buf) \
		64	return -1;
		65
		66	typedef SV SV8; /* byte-sv, used for argument-checking */
47		67
48	enum {	68	enum {
49	REQ_QUIT,	69	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	70	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	71	REQ_READ, REQ_WRITE,
52	REQ_SENDFILE,	72	REQ_READAHEAD, REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	73	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		74	REQ_UTIME, REQ_FUTIME,
		75	REQ_CHMOD, REQ_FCHMOD,
		76	REQ_CHOWN, REQ_FCHOWN,
54	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	78	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
56	REQ_READDIR,	79	REQ_MKNOD, REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	80	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
58	};	83	};
59		84
60	#define AIO_CB_KLASS "IO::AIO::CB"	85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
61		87
62	typedef struct aio_cb	88	typedef struct aio_cb
63	{	89	{
64	struct aio_cb *grp_prev, *grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
68		91
		92	SV *callback;
		93	SV *sv1, *sv2;
		94	void *ptr1, *ptr2;
		95	off_t offs;
		96	size_t size;
		97	ssize_t result;
		98	double nv1, nv2;
		99
		100	STRLEN stroffset;
		101	int type;
		102	int int1, int2, int3;
		103	int errorno;
		104	mode_t mode; /* open */
		105
		106	unsigned char flags;
		107	unsigned char pri;
		108
69	SV *self; /* the perl counterpart of this request, if any */	109	SV *self; /* the perl counterpart of this request, if any */
70		110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	int type;
80	int fd, fd2;
81	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */
84	unsigned char cancelled;
85	} aio_cb;	111	} aio_cb;
		112
		113	enum {
		114	FLAG_CANCELLED = 0x01, /* request was cancelled */
		115	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		116	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		117	};
86		118
87	typedef aio_cb *aio_req;	119	typedef aio_cb *aio_req;
88	typedef aio_cb *aio_req_ornot;	120	typedef aio_cb *aio_req_ornot;
89		121
		122	enum {
		123	PRI_MIN = -4,
		124	PRI_MAX = 4,
		125
		126	DEFAULT_PRI = 0,
		127	PRI_BIAS = -PRI_MIN,
		128	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		129	};
		130
		131	#define AIO_TICKS ((1000000 + 1023) >> 10)
		132
		133	static unsigned int max_poll_time = 0;
		134	static unsigned int max_poll_reqs = 0;
		135
		136	/* calculcate time difference in ~1/AIO_TICKS of a second */
		137	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		138	{
		139	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		140	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		141	}
		142
		143	static thread_t main_tid;
		144	static int main_sig;
		145	static int block_sig_level;
		146
		147	void block_sig ()
		148	{
		149	sigset_t ss;
		150
		151	if (block_sig_level++)
		152	return;
		153
		154	if (!main_sig)
		155	return;
		156
		157	sigemptyset (&ss);
		158	sigaddset (&ss, main_sig);
		159	pthread_sigmask (SIG_BLOCK, &ss, 0);
		160	}
		161
		162	void unblock_sig ()
		163	{
		164	sigset_t ss;
		165
		166	if (--block_sig_level)
		167	return;
		168
		169	if (!main_sig)
		170	return;
		171
		172	sigemptyset (&ss);
		173	sigaddset (&ss, main_sig);
		174	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		175	}
		176
		177	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		178
90	static int started, wanted;	179	static unsigned int started, idle, wanted;
91	static volatile int nreqs;	180
92	static int max_outstanding = 1<<30;	181	/* worker threads management */
		182	static mutex_t wrklock = MUTEX_INIT;
		183
		184	typedef struct worker {
		185	/* locked by wrklock */
		186	struct worker *prev, *next;
		187
		188	thread_t tid;
		189
		190	/* locked by reslock, reqlock or wrklock */
		191	aio_req req; /* currently processed request */
		192	void *dbuf;
		193	DIR *dirp;
		194	} worker;
		195
		196	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		197
		198	static void worker_clear (worker *wrk)
		199	{
		200	if (wrk->dirp)
		201	{
		202	closedir (wrk->dirp);
		203	wrk->dirp = 0;
		204	}
		205
		206	if (wrk->dbuf)
		207	{
		208	free (wrk->dbuf);
		209	wrk->dbuf = 0;
		210	}
		211	}
		212
		213	static void worker_free (worker *wrk)
		214	{
		215	wrk->next->prev = wrk->prev;
		216	wrk->prev->next = wrk->next;
		217
		218	free (wrk);
		219	}
		220
		221	static volatile unsigned int nreqs, nready, npending;
		222	static volatile unsigned int max_idle = 4;
		223	static volatile unsigned int max_outstanding = 0xffffffff;
93	static int respipe [2];	224	static int respipe [2];
94		225
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	226	static mutex_t reslock = MUTEX_INIT;
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	227	static mutex_t reqlock = MUTEX_INIT;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	228	static cond_t reqwait = COND_INIT;
98		229
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	#if WORDACCESS_UNSAFE
100	static volatile aio_req ress, rese; /* queue start, queue end */
101		231
		232	static unsigned int get_nready ()
		233	{
		234	unsigned int retval;
		235
		236	LOCK (reqlock);
		237	retval = nready;
		238	UNLOCK (reqlock);
		239
		240	return retval;
		241	}
		242
		243	static unsigned int get_npending ()
		244	{
		245	unsigned int retval;
		246
		247	LOCK (reslock);
		248	retval = npending;
		249	UNLOCK (reslock);
		250
		251	return retval;
		252	}
		253
		254	static unsigned int get_nthreads ()
		255	{
		256	unsigned int retval;
		257
		258	LOCK (wrklock);
		259	retval = started;
		260	UNLOCK (wrklock);
		261
		262	return retval;
		263	}
		264
		265	#else
		266
		267	# define get_nready() nready
		268	# define get_npending() npending
		269	# define get_nthreads() started
		270
		271	#endif
		272
		273	/*
		274	* a somewhat faster data structure might be nice, but
		275	* with 8 priorities this actually needs <20 insns
		276	* per shift, the most expensive operation.
		277	*/
102	typedef struct aio_grp	278	typedef struct {
103	{	279	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
104	struct aio_cb *first, *last;	280	int size;
105	SV *callback;	281	} reqq;
106	int busycount;
107	} aio_grp;
108		282
109	static void aio_grp_begin (aio_grp *grp)	283	static reqq req_queue;
110	{	284	static reqq res_queue;
111	++grp->busycount;
112	}
113		285
114	static void aio_grp_end (aio_grp *grp)	286	int reqq_push (reqq *q, aio_req req)
115	{	287	{
116	--grp->busycount;	288	int pri = req->pri;
		289	req->next = 0;
117		290
118	if (grp->busycount)	291	if (q->qe[pri])
		292	{
		293	q->qe[pri]->next = req;
		294	q->qe[pri] = req;
		295	}
		296	else
		297	q->qe[pri] = q->qs[pri] = req;
		298
		299	return q->size++;
		300	}
		301
		302	aio_req reqq_shift (reqq *q)
		303	{
		304	int pri;
		305
		306	if (!q->size)
119	return;	307	return 0;
120		308
121	SvREFCNT_dec (grp->callback);	309	--q->size;
122	grp->callback = 0;
123	}
124		310
125	static aio_grp *aio_grp_new ()	311	for (pri = NUM_PRI; pri--; )
126	{	312	{
127	aio_grp *grp;	313	aio_req req = q->qs[pri];
128		314
129	Newz (0, grp, 1, aio_grp);	315	if (req)
130	aio_grp_begin (grp);	316	{
		317	if (!(q->qs[pri] = req->next))
		318	q->qe[pri] = 0;
131		319
132	return grp;	320	return req;
		321	}
		322	}
		323
		324	abort ();
133	}	325	}
		326
		327	static int poll_cb ();
		328	static int req_invoke (aio_req req);
		329	static void req_destroy (aio_req req);
		330	static void req_cancel (aio_req req);
134		331
135	/* must be called at most once */	332	/* must be called at most once */
136	static SV *req_sv (aio_req req)	333	static SV *req_sv (aio_req req, const char *klass)
137	{	334	{
		335	if (!req->self)
		336	{
138	req->self = (SV *)newHV ();	337	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	338	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		339	}
140		340
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	341	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142	}	342	}
143		343
144	static aio_req SvAIO_REQ (SV *sv)	344	static aio_req SvAIO_REQ (SV *sv)
145	{	345	{
		346	MAGIC *mg;
		347
146	if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))	348	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
147	croak ("object of class " AIO_CB_KLASS " expected");	349	croak ("object of class " AIO_REQ_KLASS " expected");
148		350
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	351	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		352
151	return mg ? (aio_req)mg->mg_ptr : 0;	353	return mg ? (aio_req)mg->mg_ptr : 0;
152	}	354	}
153		355
		356	static void aio_grp_feed (aio_req grp)
		357	{
		358	block_sig ();
		359
		360	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		361	{
		362	int old_len = grp->size;
		363
		364	if (grp->sv2 && SvOK (grp->sv2))
		365	{
		366	dSP;
		367
		368	ENTER;
		369	SAVETMPS;
		370	PUSHMARK (SP);
		371	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		372	PUTBACK;
		373	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		374	SPAGAIN;
		375	FREETMPS;
		376	LEAVE;
		377	}
		378
		379	/* stop if no progress has been made */
		380	if (old_len == grp->size)
		381	{
		382	SvREFCNT_dec (grp->sv2);
		383	grp->sv2 = 0;
		384	break;
		385	}
		386	}
		387
		388	unblock_sig ();
		389	}
		390
		391	static void aio_grp_dec (aio_req grp)
		392	{
		393	--grp->size;
		394
		395	/* call feeder, if applicable */
		396	aio_grp_feed (grp);
		397
		398	/* finish, if done */
		399	if (!grp->size && grp->int1)
		400	{
		401	block_sig ();
		402
		403	if (!req_invoke (grp))
		404	{
		405	req_destroy (grp);
		406	unblock_sig ();
		407	croak (0);
		408	}
		409
		410	req_destroy (grp);
		411	unblock_sig ();
		412	}
		413	}
		414
		415	static int req_invoke (aio_req req)
		416	{
		417	dSP;
		418
		419	if (req->flags & FLAG_SV2_RO_OFF)
		420	SvREADONLY_off (req->sv2);
		421
		422	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		423	{
		424	ENTER;
		425	SAVETMPS;
		426	PUSHMARK (SP);
		427	EXTEND (SP, 1);
		428
		429	switch (req->type)
		430	{
		431	case REQ_READDIR:
		432	{
		433	SV *rv = &PL_sv_undef;
		434
		435	if (req->result >= 0)
		436	{
		437	int i;
		438	char *buf = req->ptr2;
		439	AV *av = newAV ();
		440
		441	av_extend (av, req->result - 1);
		442
		443	for (i = 0; i < req->result; ++i)
		444	{
		445	SV *sv = newSVpv (buf, 0);
		446
		447	av_store (av, i, sv);
		448	buf += SvCUR (sv) + 1;
		449	}
		450
		451	rv = sv_2mortal (newRV_noinc ((SV *)av));
		452	}
		453
		454	PUSHs (rv);
		455	}
		456	break;
		457
		458	case REQ_OPEN:
		459	{
		460	/* convert fd to fh */
		461	SV *fh;
		462
		463	PUSHs (sv_2mortal (newSViv (req->result)));
		464	PUTBACK;
		465	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		466	SPAGAIN;
		467
		468	fh = POPs;
		469	PUSHMARK (SP);
		470	XPUSHs (fh);
		471	}
		472	break;
		473
		474	case REQ_GROUP:
		475	req->int1 = 2; /* mark group as finished */
		476
		477	if (req->sv1)
		478	{
		479	int i;
		480	AV *av = (AV *)req->sv1;
		481
		482	EXTEND (SP, AvFILL (av) + 1);
		483	for (i = 0; i <= AvFILL (av); ++i)
		484	PUSHs (*av_fetch (av, i, 0));
		485	}
		486	break;
		487
		488	case REQ_NOP:
		489	case REQ_BUSY:
		490	break;
		491
		492	case REQ_READLINK:
		493	if (req->result > 0)
		494	{
		495	SvCUR_set (req->sv2, req->result);
		496	*SvEND (req->sv2) = 0;
		497	PUSHs (req->sv2);
		498	}
		499	break;
		500
		501	case REQ_STAT:
		502	case REQ_LSTAT:
		503	case REQ_FSTAT:
		504	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		505	PL_laststatval = req->result;
		506	PL_statcache = *(Stat_t *)(req->ptr2);
		507	PUSHs (sv_2mortal (newSViv (req->result)));
		508	break;
		509
		510	case REQ_READ:
		511	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		512	*SvEND (req->sv2) = 0;
		513	PUSHs (sv_2mortal (newSViv (req->result)));
		514	break;
		515
		516	default:
		517	PUSHs (sv_2mortal (newSViv (req->result)));
		518	break;
		519	}
		520
		521	errno = req->errorno;
		522
		523	PUTBACK;
		524	call_sv (req->callback, G_VOID | G_EVAL);
		525	SPAGAIN;
		526
		527	FREETMPS;
		528	LEAVE;
		529	}
		530
		531	if (req->grp)
		532	{
		533	aio_req grp = req->grp;
		534
		535	/* unlink request */
		536	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		537	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		538
		539	if (grp->grp_first == req)
		540	grp->grp_first = req->grp_next;
		541
		542	aio_grp_dec (grp);
		543	}
		544
		545	return !SvTRUE (ERRSV);
		546	}
		547
154	static void req_free (aio_req req)	548	static void req_destroy (aio_req req)
155	{	549	{
156	if (req->self)	550	if (req->self)
157	{	551	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	552	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	553	SvREFCNT_dec (req->self);
160	}	554	}
161		555
162	if (req->data)
163	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	556	SvREFCNT_dec (req->sv1);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	557	SvREFCNT_dec (req->sv2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	558	SvREFCNT_dec (req->callback);
176		559
177	if (req->type == REQ_READDIR && req->result >= 0)	560	if (req->flags & FLAG_PTR2_FREE)
178	free (req->data2ptr);	561	free (req->ptr2);
179		562
180	Safefree (req);	563	Safefree (req);
181	}	564	}
182		565
183	static void	566	static void req_cancel_subs (aio_req grp)
184	poll_wait ()
185	{	567	{
186	if (nreqs && !ress)	568	aio_req sub;
		569
		570	if (grp->type != REQ_GROUP)
		571	return;
		572
		573	SvREFCNT_dec (grp->sv2);
		574	grp->sv2 = 0;
		575
		576	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		577	req_cancel (sub);
		578	}
		579
		580	static void req_cancel (aio_req req)
		581	{
		582	req->flags |= FLAG_CANCELLED;
		583
		584	req_cancel_subs (req);
		585	}
		586
		587	static void *aio_proc (void *arg);
		588
		589	static void start_thread (void)
		590	{
		591	worker *wrk = calloc (1, sizeof (worker));
		592
		593	if (!wrk)
		594	croak ("unable to allocate worker thread data");
		595
		596	LOCK (wrklock);
		597
		598	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
187	{	599	{
		600	wrk->prev = &wrk_first;
		601	wrk->next = wrk_first.next;
		602	wrk_first.next->prev = wrk;
		603	wrk_first.next = wrk;
		604	++started;
		605	}
		606	else
		607	free (wrk);
		608
		609	UNLOCK (wrklock);
		610	}
		611
		612	static void maybe_start_thread ()
		613	{
		614	if (get_nthreads () >= wanted)
		615	return;
		616
		617	/* todo: maybe use idle here, but might be less exact */
		618	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		619	return;
		620
		621	start_thread ();
		622	}
		623
		624	static void req_send (aio_req req)
		625	{
		626	block_sig ();
		627
		628	++nreqs;
		629
		630	LOCK (reqlock);
		631	++nready;
		632	reqq_push (&req_queue, req);
		633	COND_SIGNAL (reqwait);
		634	UNLOCK (reqlock);
		635
		636	unblock_sig ();
		637
		638	maybe_start_thread ();
		639	}
		640
		641	static void end_thread (void)
		642	{
		643	aio_req req;
		644
		645	Newz (0, req, 1, aio_cb);
		646
		647	req->type = REQ_QUIT;
		648	req->pri = PRI_MAX + PRI_BIAS;
		649
		650	LOCK (reqlock);
		651	reqq_push (&req_queue, req);
		652	COND_SIGNAL (reqwait);
		653	UNLOCK (reqlock);
		654
		655	LOCK (wrklock);
		656	--started;
		657	UNLOCK (wrklock);
		658	}
		659
		660	static void set_max_idle (int nthreads)
		661	{
		662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		663	max_idle = nthreads <= 0 ? 1 : nthreads;
		664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		665	}
		666
		667	static void min_parallel (int nthreads)
		668	{
		669	if (wanted < nthreads)
		670	wanted = nthreads;
		671	}
		672
		673	static void max_parallel (int nthreads)
		674	{
		675	if (wanted > nthreads)
		676	wanted = nthreads;
		677
		678	while (started > wanted)
		679	end_thread ();
		680	}
		681
		682	static void poll_wait ()
		683	{
188	fd_set rfd;	684	fd_set rfd;
		685
		686	while (nreqs)
		687	{
		688	int size;
		689	if (WORDACCESS_UNSAFE) LOCK (reslock);
		690	size = res_queue.size;
		691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		692
		693	if (size)
		694	return;
		695
		696	maybe_start_thread ();
		697
189	FD_ZERO(&rfd);	698	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);	699	FD_SET(respipe [0], &rfd);
191		700
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	701	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}	702	}
194	}	703	}
195		704
196	static int	705	static int poll_cb ()
197	poll_cb ()
198	{	706	{
199	dSP;	707	dSP;
200	int count = 0;	708	int count = 0;
		709	int maxreqs = max_poll_reqs;
201	int do_croak = 0;	710	int do_croak = 0;
		711	struct timeval tv_start, tv_now;
202	aio_req req;	712	aio_req req;
		713
		714	if (max_poll_time)
		715	gettimeofday (&tv_start, 0);
		716
		717	block_sig ();
203		718
204	for (;;)	719	for (;;)
205	{	720	{
206	pthread_mutex_lock (&reslock);	721	for (;;)
207	req = ress;
208
209	if (req)
210	{	722	{
211	ress = req->next;	723	maybe_start_thread ();
212		724
		725	LOCK (reslock);
		726	req = reqq_shift (&res_queue);
		727
213	if (!ress)	728	if (req)
214	{	729	{
		730	--npending;
		731
		732	if (!res_queue.size)
		733	{
215	/* read any signals sent by the worker threads */	734	/* read any signals sent by the worker threads */
216	char buf [32];	735	char buf [4];
217	while (read (respipe [0], buf, 32) == 32)	736	while (read (respipe [0], buf, 4) == 4)
		737	;
218	;	738	}
219
220	rese = 0;
221	}	739	}
222	}
223		740
224	pthread_mutex_unlock (&reslock);	741	UNLOCK (reslock);
225		742
226	if (!req)	743	if (!req)
227	break;	744	break;
228		745
229	nreqs--;	746	--nreqs;
230		747
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)	748	if (req->type == REQ_GROUP && req->size)
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	{	749	{
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	750	req->int1 = 1; /* mark request as delayed */
247	PL_laststatval = req->result;	751	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	}	752	}
277	else	753	else
278	{	754	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));	755	if (!req_invoke (req))
280
281	if (req->type == REQ_OPEN)
282	{	756	{
283	/* convert fd to fh */
284	SV *fh;
285
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	}
295	}
296
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);	757	req_destroy (req);
		758	unblock_sig ();
306	croak (0);	759	croak (0);
307	}	760	}
		761
		762	count++;
308	}	763	}
309		764
310	LEAVE;	765	req_destroy (req);
311		766
312	errno = errorno;	767	if (maxreqs && !--maxreqs)
313	count++;	768	break;
		769
		770	if (max_poll_time)
		771	{
		772	gettimeofday (&tv_now, 0);
		773
		774	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		775	break;
		776	}
314	}	777	}
315		778
316	req_free (req);	779	if (nreqs <= max_outstanding)
		780	break;
		781
		782	poll_wait ();
		783
		784	++maxreqs;
317	}	785	}
318		786
		787	unblock_sig ();
319	return count;	788	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	}	789	}
414		790
415	static void create_pipe ()	791	static void create_pipe ()
416	{	792	{
417	if (pipe (respipe))	793	if (pipe (respipe))
…		…
434	/*	810	/*
435	* make our pread/pwrite safe against themselves, but not against	811	* make our pread/pwrite safe against themselves, but not against
436	* normal read/write by using a mutex. slows down execution a lot,	812	* normal read/write by using a mutex. slows down execution a lot,
437	* but that's your problem, not mine.	813	* but that's your problem, not mine.
438	*/	814	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	815	static mutex_t preadwritelock = MUTEX_INIT;
440		816
441	static ssize_t	817	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	{	818	{
444	ssize_t res;	819	ssize_t res;
445	off_t ooffset;	820	off_t ooffset;
446		821
447	pthread_mutex_lock (&preadwritelock);	822	LOCK (preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);	823	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);	824	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);	825	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);	826	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);	827	UNLOCK (preadwritelock);
453		828
454	return res;	829	return res;
455	}	830	}
456		831
457	static ssize_t
458	pwrite (int fd, void *buf, size_t count, off_t offset)	832	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
459	{	833	{
460	ssize_t res;	834	ssize_t res;
461	off_t ooffset;	835	off_t ooffset;
462		836
463	pthread_mutex_lock (&preadwritelock);	837	LOCK (preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);	838	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);	839	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);	840	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);	841	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);	842	UNLOCK (preadwritelock);
469		843
470	return res;	844	return res;
471	}	845	}
		846	#endif
		847
		848	#ifndef HAVE_FUTIMES
		849
		850	# define utimes(path,times) aio_utimes (path, times)
		851	# define futimes(fd,times) aio_futimes (fd, times)
		852
		853	int aio_utimes (const char *filename, const struct timeval times[2])
		854	{
		855	if (times)
		856	{
		857	struct utimbuf buf;
		858
		859	buf.actime = times[0].tv_sec;
		860	buf.modtime = times[1].tv_sec;
		861
		862	return utime (filename, &buf);
		863	}
		864	else
		865	return utime (filename, 0);
		866	}
		867
		868	int aio_futimes (int fd, const struct timeval tv[2])
		869	{
		870	errno = ENOSYS;
		871	return -1;
		872	}
		873
472	#endif	874	#endif
473		875
474	#if !HAVE_FDATASYNC	876	#if !HAVE_FDATASYNC
475	# define fdatasync fsync	877	# define fdatasync fsync
476	#endif	878	#endif
477		879
478	#if !HAVE_READAHEAD	880	#if !HAVE_READAHEAD
479	# define readahead aio_readahead	881	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
480		882
481	static ssize_t	883	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	{	884	{
484	char readahead_buf[4096];	885	dBUF;
485		886
486	while (count > 0)	887	while (count > 0)
487	{	888	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	889	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
489		890
490	pread (fd, readahead_buf, len, offset);	891	pread (fd, aio_buf, len, offset);
491	offset += len;	892	offset += len;
492	count -= len;	893	count -= len;
493	}	894	}
494		895
495	errno = 0;	896	errno = 0;
496	}	897	}
		898
497	#endif	899	#endif
498		900
499	#if !HAVE_READDIR_R	901	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r	902	# define readdir_r aio_readdir_r
501		903
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	904	static mutex_t readdirlock = MUTEX_INIT;
503		905
504	static int
505	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	906	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506	{	907	{
507	struct dirent *e;	908	struct dirent *e;
508	int errorno;	909	int errorno;
509		910
510	pthread_mutex_lock (&readdirlock);	911	LOCK (readdirlock);
511		912
512	e = readdir (dirp);	913	e = readdir (dirp);
513	errorno = errno;	914	errorno = errno;
514		915
515	if (e)	916	if (e)
…		…
518	strcpy (ent->d_name, e->d_name);	919	strcpy (ent->d_name, e->d_name);
519	}	920	}
520	else	921	else
521	*res = 0;	922	*res = 0;
522		923
523	pthread_mutex_unlock (&readdirlock);	924	UNLOCK (readdirlock);
524		925
525	errno = errorno;	926	errno = errorno;
526	return e ? 0 : -1;	927	return e ? 0 : -1;
527	}	928	}
528	#endif	929	#endif
529		930
530	/* sendfile always needs emulation */	931	/* sendfile always needs emulation */
531	static ssize_t
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	932	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
533	{	933	{
534	ssize_t res;	934	ssize_t res;
535		935
536	if (!count)	936	if (!count)
537	return 0;	937	return 0;
…		…
548	{	948	{
549	off_t sbytes;	949	off_t sbytes;
550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	950	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551		951
552	if (res < 0 && sbytes)	952	if (res < 0 && sbytes)
553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	953	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
554	res = sbytes;	954	res = sbytes;
555	}	955	}
556		956
557	# elif __hpux	957	# elif __hpux
558	res = sendfile (ofd, ifd, offset, count, 0, 0);	958	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
586	#endif	986	#endif
587	)	987	)
588	)	988	)
589	{	989	{
590	/* emulate sendfile. this is a major pain in the ass */	990	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];	991	dBUF;
		992
592	res = 0;	993	res = 0;
593		994
594	while (count)	995	while (count)
595	{	996	{
596	ssize_t cnt;	997	ssize_t cnt;
597		998
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	999	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
599		1000
600	if (cnt <= 0)	1001	if (cnt <= 0)
601	{	1002	{
602	if (cnt && !res) res = -1;	1003	if (cnt && !res) res = -1;
603	break;	1004	break;
604	}	1005	}
605		1006
606	cnt = write (ofd, buf, cnt);	1007	cnt = write (ofd, aio_buf, cnt);
607		1008
608	if (cnt <= 0)	1009	if (cnt <= 0)
609	{	1010	{
610	if (cnt && !res) res = -1;	1011	if (cnt && !res) res = -1;
611	break;	1012	break;
…		…
619		1020
620	return res;	1021	return res;
621	}	1022	}
622		1023
623	/* read a full directory */	1024	/* read a full directory */
624	static int	1025	static void scandir_ (aio_req req, worker *self)
625	scandir_ (const char *path, void **namesp)
626	{	1026	{
627	DIR *dirp = opendir (path);	1027	DIR *dirp;
628	union	1028	union
629	{	1029	{
630	struct dirent d;	1030	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1031	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;	1032	} *u;
633	struct dirent *entp;	1033	struct dirent *entp;
634	char *name, *names;	1034	char *name, *names;
635	int memlen = 4096;	1035	int memlen = 4096;
636	int memofs = 0;	1036	int memofs = 0;
637	int res = 0;	1037	int res = 0;
638	int errorno;	1038	int errorno;
639		1039
640	if (!dirp)	1040	LOCK (wrklock);
641	return -1;	1041	self->dirp = dirp = opendir (req->ptr1);
642		1042	self->dbuf = u = malloc (sizeof (*u));
		1043	req->flags |= FLAG_PTR2_FREE;
643	names = malloc (memlen);	1044	req->ptr2 = names = malloc (memlen);
		1045	UNLOCK (wrklock);
		1046
		1047	if (dirp && u && names)
		1048	for (;;)
		1049	{
		1050	errno = 0;
		1051	readdir_r (dirp, &u->d, &entp);
		1052
		1053	if (!entp)
		1054	break;
		1055
		1056	name = entp->d_name;
		1057
		1058	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1059	{
		1060	int len = strlen (name) + 1;
		1061
		1062	res++;
		1063
		1064	while (memofs + len > memlen)
		1065	{
		1066	memlen *= 2;
		1067	LOCK (wrklock);
		1068	req->ptr2 = names = realloc (names, memlen);
		1069	UNLOCK (wrklock);
		1070
		1071	if (!names)
		1072	break;
		1073	}
		1074
		1075	memcpy (names + memofs, name, len);
		1076	memofs += len;
		1077	}
		1078	}
		1079
		1080	if (errno)
		1081	res = -1;
		1082
		1083	req->result = res;
		1084	}
		1085
		1086	/*****************************************************************************/
		1087
		1088	static void *aio_proc (void *thr_arg)
		1089	{
		1090	aio_req req;
		1091	struct timespec ts;
		1092	worker *self = (worker *)thr_arg;
		1093
		1094	/* try to distribute timeouts somewhat evenly */
		1095	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1096	* (1000000000UL / 1024UL);
644		1097
645	for (;;)	1098	for (;;)
646	{	1099	{
647	errno = 0, readdir_r (dirp, &u.d, &entp);	1100	ts.tv_sec = time (0) + IDLE_TIMEOUT;
648		1101
649	if (!entp)	1102	LOCK (reqlock);
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		1103
699	for (;;)	1104	for (;;)
700	{	1105	{
701	req = reqs;	1106	self->req = req = reqq_shift (&req_queue);
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708		1107
709	if (req)	1108	if (req)
710	break;	1109	break;
711		1110
712	pthread_cond_wait (&reqwait, &reqlock);	1111	++idle;
		1112
		1113	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1114	== ETIMEDOUT)
		1115	{
		1116	if (idle > max_idle)
		1117	{
		1118	--idle;
		1119	UNLOCK (reqlock);
		1120	LOCK (wrklock);
		1121	--started;
		1122	UNLOCK (wrklock);
		1123	goto quit;
		1124	}
		1125
		1126	/* we are allowed to idle, so do so without any timeout */
		1127	COND_WAIT (reqwait, reqlock);
		1128	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1129	}
		1130
		1131	--idle;
713	}	1132	}
714		1133
715	pthread_mutex_unlock (&reqlock);	1134	--nready;
		1135
		1136	UNLOCK (reqlock);
716		1137
717	errno = 0; /* strictly unnecessary */	1138	errno = 0; /* strictly unnecessary */
718		1139
719	if (!req->cancelled)	1140	if (!(req->flags & FLAG_CANCELLED))
720	switch (req->type)	1141	switch (req->type)
721	{	1142	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1143	case REQ_READ: req->result = req->offs >= 0
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1144	? pread (req->int1, req->ptr1, req->size, req->offs)
		1145	: read (req->int1, req->ptr1, req->size); break;
		1146	case REQ_WRITE: req->result = req->offs >= 0
		1147	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1148	: write (req->int1, req->ptr1, req->size); break;
724		1149
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1150	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1151	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
727		1152
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1153	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1154	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1155	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
731		1156
		1157	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1158	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1159	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1160	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1161
732	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1162	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
733	case REQ_CLOSE: req->result = close (req->fd); break;	1163	case REQ_CLOSE: req->result = close (req->int1); break;
734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1164	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1165	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1166	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1167	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1168	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1169	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1170	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1171	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
739		1172
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1173	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;	1174	case REQ_FSYNC: req->result = fsync (req->int1); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1175	case REQ_READDIR: scandir_ (req, self); break;
		1176
		1177	case REQ_BUSY:
		1178	{
		1179	struct timeval tv;
		1180
		1181	tv.tv_sec = req->nv1;
		1182	tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
		1183
		1184	req->result = select (0, 0, 0, 0, &tv);
		1185	}
		1186
		1187	case REQ_UTIME:
		1188	case REQ_FUTIME:
		1189	{
		1190	struct timeval tv[2];
		1191	struct timeval *times;
		1192
		1193	if (req->nv1 != -1. || req->nv2 != -1.)
		1194	{
		1195	tv[0].tv_sec = req->nv1;
		1196	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1197	tv[1].tv_sec = req->nv2;
		1198	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1199
		1200	times = tv;
		1201	}
		1202	else
		1203	times = 0;
		1204
		1205
		1206	req->result = req->type == REQ_FUTIME
		1207	? futimes (req->int1, times)
		1208	: utimes (req->ptr1, times);
		1209	}
		1210
		1211	case REQ_GROUP:
		1212	case REQ_NOP:
		1213	break;
743		1214
744	case REQ_QUIT:	1215	case REQ_QUIT:
745	break;	1216	goto quit;
746		1217
747	default:	1218	default:
748	req->result = ENOSYS;	1219	req->result = -1;
749	break;	1220	break;
750	}	1221	}
751		1222
752	req->errorno = errno;	1223	req->errorno = errno;
753		1224
754	pthread_mutex_lock (&reslock);	1225	LOCK (reslock);
755		1226
756	req->next = 0;	1227	++npending;
757		1228
758	if (rese)	1229	if (!reqq_push (&res_queue, req))
759	{	1230	{
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 */	1231	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);	1232	write (respipe [1], &respipe, 1);
		1233
		1234	/* optionally signal the main thread asynchronously */
		1235	if (main_sig)
		1236	pthread_kill (main_tid, main_sig);
769	}	1237	}
770		1238
771	pthread_mutex_unlock (&reslock);	1239	self->req = 0;
		1240	worker_clear (self);
		1241
		1242	UNLOCK (reslock);
772	}	1243	}
773	while (type != REQ_QUIT);	1244
		1245	quit:
		1246	LOCK (wrklock);
		1247	worker_free (self);
		1248	UNLOCK (wrklock);
774		1249
775	return 0;	1250	return 0;
776	}	1251	}
777		1252
778	/*****************************************************************************/	1253	/*****************************************************************************/
779		1254
780	static void atfork_prepare (void)	1255	static void atfork_prepare (void)
781	{	1256	{
782	pthread_mutex_lock (&reqlock);	1257	LOCK (wrklock);
783	pthread_mutex_lock (&reslock);	1258	LOCK (reqlock);
		1259	LOCK (reslock);
784	#if !HAVE_PREADWRITE	1260	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);	1261	LOCK (preadwritelock);
786	#endif	1262	#endif
787	#if !HAVE_READDIR_R	1263	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);	1264	LOCK (readdirlock);
789	#endif	1265	#endif
790	}	1266	}
791		1267
792	static void atfork_parent (void)	1268	static void atfork_parent (void)
793	{	1269	{
794	#if !HAVE_READDIR_R	1270	#if !HAVE_READDIR_R
795	pthread_mutex_unlock (&readdirlock);	1271	UNLOCK (readdirlock);
796	#endif	1272	#endif
797	#if !HAVE_PREADWRITE	1273	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);	1274	UNLOCK (preadwritelock);
799	#endif	1275	#endif
800	pthread_mutex_unlock (&reslock);	1276	UNLOCK (reslock);
801	pthread_mutex_unlock (&reqlock);	1277	UNLOCK (reqlock);
		1278	UNLOCK (wrklock);
802	}	1279	}
803		1280
804	static void atfork_child (void)	1281	static void atfork_child (void)
805	{	1282	{
806	aio_req prv;	1283	aio_req prv;
807		1284
808	started = 0;	1285	while (prv = reqq_shift (&req_queue))
		1286	req_destroy (prv);
809		1287
810	while (reqs)	1288	while (prv = reqq_shift (&res_queue))
		1289	req_destroy (prv);
		1290
		1291	while (wrk_first.next != &wrk_first)
811	{	1292	{
812	prv = reqs;	1293	worker *wrk = wrk_first.next;
813	reqs = prv->next;	1294
		1295	if (wrk->req)
		1296	req_destroy (wrk->req);
		1297
		1298	worker_clear (wrk);
814	req_free (prv);	1299	worker_free (wrk);
815	}	1300	}
816		1301
817	reqs = reqe = 0;	1302	started = 0;
818		1303	idle = 0;
819	while (ress)	1304	nreqs = 0;
820	{	1305	nready = 0;
821	prv = ress;	1306	npending = 0;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827		1307
828	close (respipe [0]);	1308	close (respipe [0]);
829	close (respipe [1]);	1309	close (respipe [1]);
830	create_pipe ();	1310	create_pipe ();
831		1311
832	atfork_parent ();	1312	atfork_parent ();
833	}	1313	}
834		1314
835	#define dREQ \	1315	#define dREQ \
836	aio_req req; \	1316	aio_req req; \
		1317	int req_pri = next_pri; \
		1318	next_pri = DEFAULT_PRI + PRI_BIAS; \
837	\	1319	\
838	if (SvOK (callback) && !SvROK (callback)) \	1320	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \	1321	croak ("callback must be undef or of reference type"); \
840	\	1322	\
841	Newz (0, req, 1, aio_cb); \	1323	Newz (0, req, 1, aio_cb); \
842	if (!req) \	1324	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	1325	croak ("out of memory during aio_req allocation"); \
844	\	1326	\
845	req->callback = newSVsv (callback)	1327	req->callback = newSVsv (callback); \
		1328	req->pri = req_pri
846		1329
847	#define REQ_SEND \	1330	#define REQ_SEND \
848	req_send (req); \	1331	req_send (req); \
849	\	1332	\
850	if (GIMME_V != G_VOID) \	1333	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	1334	XPUSHs (req_sv (req, AIO_REQ_KLASS));
852		1335
853	MODULE = IO::AIO PACKAGE = IO::AIO	1336	MODULE = IO::AIO PACKAGE = IO::AIO
854		1337
855	PROTOTYPES: ENABLE	1338	PROTOTYPES: ENABLE
856		1339
857	BOOT:	1340	BOOT:
858	{	1341	{
859	HV *stash = gv_stashpv ("IO::AIO", 1);	1342	HV *stash = gv_stashpv ("IO::AIO", 1);
		1343
860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1344	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1345	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1346	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1347	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1348	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1349	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1350	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
863		1351
864	create_pipe ();	1352	create_pipe ();
865	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1353	ATFORK (atfork_prepare, atfork_parent, atfork_child);
866	}	1354	}
867		1355
868	void	1356	void
869	min_parallel (nthreads)	1357	max_poll_reqs (int nreqs)
870	int nthreads
871	PROTOTYPE: $	1358	PROTOTYPE: $
		1359	CODE:
		1360	max_poll_reqs = nreqs;
872		1361
873	void	1362	void
874	max_parallel (nthreads)	1363	max_poll_time (double nseconds)
875	int nthreads
876	PROTOTYPE: $	1364	PROTOTYPE: $
		1365	CODE:
		1366	max_poll_time = nseconds * AIO_TICKS;
		1367
		1368	void
		1369	min_parallel (int nthreads)
		1370	PROTOTYPE: $
		1371
		1372	void
		1373	max_parallel (int nthreads)
		1374	PROTOTYPE: $
		1375
		1376	void
		1377	max_idle (int nthreads)
		1378	PROTOTYPE: $
		1379	CODE:
		1380	set_max_idle (nthreads);
877		1381
878	int	1382	int
879	max_outstanding (nreqs)	1383	max_outstanding (int maxreqs)
880	int nreqs	1384	PROTOTYPE: $
881	PROTOTYPE: $
882	CODE:	1385	CODE:
883	RETVAL = max_outstanding;	1386	RETVAL = max_outstanding;
884	max_outstanding = nreqs;	1387	max_outstanding = maxreqs;
		1388	OUTPUT:
		1389	RETVAL
885		1390
886	void	1391	void
887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1392	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
888	SV * pathname
889	int flags
890	int mode
891	SV * callback
892	PROTOTYPE: $$$;$	1393	PROTOTYPE: $$$;$
893	PPCODE:	1394	PPCODE:
894	{	1395	{
895	dREQ;	1396	dREQ;
896		1397
897	req->type = REQ_OPEN;	1398	req->type = REQ_OPEN;
898	req->data = newSVsv (pathname);	1399	req->sv1 = newSVsv (pathname);
899	req->dataptr = SvPVbyte_nolen (req->data);	1400	req->ptr1 = SvPVbyte_nolen (req->sv1);
900	req->fd = flags;	1401	req->int1 = flags;
901	req->mode = mode;	1402	req->mode = mode;
902		1403
903	REQ_SEND;	1404	REQ_SEND;
904	}	1405	}
905		1406
906	void	1407	void
907	aio_close (fh,callback=&PL_sv_undef)	1408	aio_close (SV *fh, SV *callback=&PL_sv_undef)
908	SV * fh
909	SV * callback
910	PROTOTYPE: $;$	1409	PROTOTYPE: $;$
911	ALIAS:	1410	ALIAS:
912	aio_close = REQ_CLOSE	1411	aio_close = REQ_CLOSE
913	aio_fsync = REQ_FSYNC	1412	aio_fsync = REQ_FSYNC
914	aio_fdatasync = REQ_FDATASYNC	1413	aio_fdatasync = REQ_FDATASYNC
915	PPCODE:	1414	PPCODE:
916	{	1415	{
917	dREQ;	1416	dREQ;
918		1417
919	req->type = ix;	1418	req->type = ix;
920	req->fh = newSVsv (fh);	1419	req->sv1 = newSVsv (fh);
921	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1420	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
922		1421
923	REQ_SEND (req);	1422	REQ_SEND (req);
924	}	1423	}
925		1424
926	void	1425	void
927	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1426	aio_read (SV *fh, SV *offset, UV length, SV8 *data, UV dataoffset, SV *callback=&PL_sv_undef)
928	SV * fh
929	UV offset
930	UV length
931	SV * data
932	UV dataoffset
933	SV * callback
934	ALIAS:	1427	ALIAS:
935	aio_read = REQ_READ	1428	aio_read = REQ_READ
936	aio_write = REQ_WRITE	1429	aio_write = REQ_WRITE
937	PROTOTYPE: $$$$$;$	1430	PROTOTYPE: $$$$$;$
938	PPCODE:	1431	PPCODE:
939	{	1432	{
940	aio_req req;
941	STRLEN svlen;	1433	STRLEN svlen;
942	char *svptr = SvPVbyte (data, svlen);	1434	char *svptr = SvPVbyte (data, svlen);
943		1435
944	SvUPGRADE (data, SVt_PV);	1436	SvUPGRADE (data, SVt_PV);
945	SvPOK_on (data);	1437	SvPOK_on (data);
…		…
957	length = svlen - dataoffset;	1449	length = svlen - dataoffset;
958	}	1450	}
959	else	1451	else
960	{	1452	{
961	/* read: grow scalar as necessary */	1453	/* read: grow scalar as necessary */
962	svptr = SvGROW (data, length + dataoffset);	1454	svptr = SvGROW (data, length + dataoffset + 1);
963	}	1455	}
964		1456
965	if (length < 0)	1457	if (length < 0)
966	croak ("length must not be negative");	1458	croak ("length must not be negative");
967		1459
968	{	1460	{
969	dREQ;	1461	dREQ;
970		1462
971	req->type = ix;	1463	req->type = ix;
972	req->fh = newSVsv (fh);	1464	req->sv1 = newSVsv (fh);
973	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1465	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
974	: IoOFP (sv_2io (fh)));	1466	: IoOFP (sv_2io (fh)));
975	req->offset = offset;	1467	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
976	req->length = length;	1468	req->size = length;
977	req->data = SvREFCNT_inc (data);	1469	req->sv2 = SvREFCNT_inc (data);
978	req->dataptr = (char *)svptr + dataoffset;	1470	req->ptr1 = (char *)svptr + dataoffset;
		1471	req->stroffset = dataoffset;
979		1472
980	if (!SvREADONLY (data))	1473	if (!SvREADONLY (data))
981	{	1474	{
982	SvREADONLY_on (data);	1475	SvREADONLY_on (data);
983	req->data2ptr = (void *)data;	1476	req->flags |= FLAG_SV2_RO_OFF;
984	}	1477	}
985		1478
986	REQ_SEND;	1479	REQ_SEND;
987	}	1480	}
988	}	1481	}
989		1482
990	void	1483	void
		1484	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1485	PROTOTYPE: $$;$
		1486	PPCODE:
		1487	{
		1488	SV *data;
		1489	dREQ;
		1490
		1491	data = newSV (NAME_MAX);
		1492	SvPOK_on (data);
		1493
		1494	req->type = REQ_READLINK;
		1495	req->sv1 = newSVsv (path);
		1496	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1497	req->sv2 = data;
		1498	req->ptr1 = SvPVbyte_nolen (data);
		1499
		1500	REQ_SEND;
		1501	}
		1502
		1503	void
991	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1504	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
992	SV * out_fh
993	SV * in_fh
994	UV in_offset
995	UV length
996	SV * callback
997	PROTOTYPE: $$$$;$	1505	PROTOTYPE: $$$$;$
998	PPCODE:	1506	PPCODE:
999	{	1507	{
1000	dREQ;	1508	dREQ;
1001		1509
1002	req->type = REQ_SENDFILE;	1510	req->type = REQ_SENDFILE;
1003	req->fh = newSVsv (out_fh);	1511	req->sv1 = newSVsv (out_fh);
1004	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1512	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1005	req->fh2 = newSVsv (in_fh);	1513	req->sv2 = newSVsv (in_fh);
1006	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1514	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1007	req->offset = in_offset;	1515	req->offs = SvVAL64 (in_offset);
1008	req->length = length;	1516	req->size = length;
1009		1517
1010	REQ_SEND;	1518	REQ_SEND;
1011	}	1519	}
1012		1520
1013	void	1521	void
1014	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1522	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1015	SV * fh
1016	UV offset
1017	IV length
1018	SV * callback
1019	PROTOTYPE: $$$;$	1523	PROTOTYPE: $$$;$
1020	PPCODE:	1524	PPCODE:
1021	{	1525	{
1022	dREQ;	1526	dREQ;
1023		1527
1024	req->type = REQ_READAHEAD;	1528	req->type = REQ_READAHEAD;
1025	req->fh = newSVsv (fh);	1529	req->sv1 = newSVsv (fh);
1026	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1530	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1027	req->offset = offset;	1531	req->offs = SvVAL64 (offset);
1028	req->length = length;	1532	req->size = length;
1029		1533
1030	REQ_SEND;	1534	REQ_SEND;
1031	}	1535	}
1032		1536
1033	void	1537	void
1034	aio_stat (fh_or_path,callback=&PL_sv_undef)	1538	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1035	SV * fh_or_path
1036	SV * callback
1037	ALIAS:	1539	ALIAS:
1038	aio_stat = REQ_STAT	1540	aio_stat = REQ_STAT
1039	aio_lstat = REQ_LSTAT	1541	aio_lstat = REQ_LSTAT
1040	PPCODE:	1542	PPCODE:
1041	{	1543	{
1042	dREQ;	1544	dREQ;
1043		1545
1044	New (0, req->statdata, 1, Stat_t);	1546	req->ptr2 = malloc (sizeof (Stat_t));
1045	if (!req->statdata)	1547	if (!req->ptr2)
1046	{	1548	{
1047	req_free (req);	1549	req_destroy (req);
1048	croak ("out of memory during aio_req->statdata allocation");	1550	croak ("out of memory during aio_stat statdata allocation");
1049	}	1551	}
		1552
		1553	req->flags |= FLAG_PTR2_FREE;
		1554	req->sv1 = newSVsv (fh_or_path);
1050		1555
1051	if (SvPOK (fh_or_path))	1556	if (SvPOK (fh_or_path))
1052	{	1557	{
1053	req->type = ix;	1558	req->type = ix;
1054	req->data = newSVsv (fh_or_path);
1055	req->dataptr = SvPVbyte_nolen (req->data);	1559	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	}	1560	}
1057	else	1561	else
1058	{	1562	{
1059	req->type = REQ_FSTAT;	1563	req->type = REQ_FSTAT;
1060	req->fh = newSVsv (fh_or_path);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1062	}	1565	}
1063		1566
1064	REQ_SEND;	1567	REQ_SEND;
1065	}	1568	}
1066		1569
1067	void	1570	void
		1571	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1572	PPCODE:
		1573	{
		1574	dREQ;
		1575
		1576	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1577	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1578	req->sv1 = newSVsv (fh_or_path);
		1579
		1580	if (SvPOK (fh_or_path))
		1581	{
		1582	req->type = REQ_UTIME;
		1583	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1584	}
		1585	else
		1586	{
		1587	req->type = REQ_FUTIME;
		1588	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1589	}
		1590
		1591	REQ_SEND;
		1592	}
		1593
		1594	void
		1595	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1596	PPCODE:
		1597	{
		1598	dREQ;
		1599
		1600	req->mode = mode;
		1601	req->sv1 = newSVsv (fh_or_path);
		1602
		1603	if (SvPOK (fh_or_path))
		1604	{
		1605	req->type = REQ_CHMOD;
		1606	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1607	}
		1608	else
		1609	{
		1610	req->type = REQ_FCHMOD;
		1611	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1612	}
		1613
		1614	REQ_SEND;
		1615	}
		1616
		1617	void
		1618	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1619	PPCODE:
		1620	{
		1621	dREQ;
		1622
		1623	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1624	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1625	req->sv1 = newSVsv (fh_or_path);
		1626
		1627	if (SvPOK (fh_or_path))
		1628	{
		1629	req->type = REQ_CHOWN;
		1630	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1631	}
		1632	else
		1633	{
		1634	req->type = REQ_FCHOWN;
		1635	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1636	}
		1637
		1638	REQ_SEND;
		1639	}
		1640
		1641	void
1068	aio_unlink (pathname,callback=&PL_sv_undef)	1642	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1069	SV * pathname
1070	SV * callback
1071	ALIAS:	1643	ALIAS:
1072	aio_unlink = REQ_UNLINK	1644	aio_unlink = REQ_UNLINK
1073	aio_rmdir = REQ_RMDIR	1645	aio_rmdir = REQ_RMDIR
1074	aio_readdir = REQ_READDIR	1646	aio_readdir = REQ_READDIR
1075	PPCODE:	1647	PPCODE:
1076	{	1648	{
1077	dREQ;	1649	dREQ;
1078		1650
1079	req->type = ix;	1651	req->type = ix;
1080	req->data = newSVsv (pathname);	1652	req->sv1 = newSVsv (pathname);
1081	req->dataptr = SvPVbyte_nolen (req->data);	1653	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1654
		1655	REQ_SEND;
		1656	}
		1657
		1658	void
		1659	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1660	PPCODE:
		1661	{
		1662	dREQ;
1082		1663
		1664	req->type = REQ_MKDIR;
		1665	req->sv1 = newSVsv (pathname);
		1666	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1667	req->mode = mode;
		1668
1083	REQ_SEND;	1669	REQ_SEND;
1084	}	1670	}
1085		1671
1086	void	1672	void
1087	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1673	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1088	SV * oldpath
1089	SV * newpath
1090	SV * callback
1091	ALIAS:	1674	ALIAS:
1092	aio_link = REQ_LINK	1675	aio_link = REQ_LINK
1093	aio_symlink = REQ_SYMLINK	1676	aio_symlink = REQ_SYMLINK
1094	aio_rename = REQ_RENAME	1677	aio_rename = REQ_RENAME
1095	PPCODE:	1678	PPCODE:
1096	{	1679	{
1097	dREQ;	1680	dREQ;
1098		1681
1099	req->type = ix;	1682	req->type = ix;
1100	req->fh = newSVsv (oldpath);	1683	req->sv2 = newSVsv (oldpath);
1101	req->data2ptr = SvPVbyte_nolen (req->fh);	1684	req->ptr2 = SvPVbyte_nolen (req->sv2);
1102	req->data = newSVsv (newpath);	1685	req->sv1 = newSVsv (newpath);
1103	req->dataptr = SvPVbyte_nolen (req->data);	1686	req->ptr1 = SvPVbyte_nolen (req->sv1);
1104		1687
1105	REQ_SEND;	1688	REQ_SEND;
1106	}	1689	}
1107		1690
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1691	void
1112	cancel_most_requests ()	1692	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1693	PPCODE:
		1694	{
		1695	dREQ;
		1696
		1697	req->type = REQ_MKNOD;
		1698	req->sv1 = newSVsv (pathname);
		1699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1700	req->mode = (mode_t)mode;
		1701	req->offs = dev;
		1702
		1703	REQ_SEND;
		1704	}
		1705
		1706	void
		1707	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1708	PPCODE:
		1709	{
		1710	dREQ;
		1711
		1712	req->type = REQ_BUSY;
		1713	req->nv1 = delay < 0. ? 0. : delay;
		1714
		1715	REQ_SEND;
		1716	}
		1717
		1718	void
		1719	aio_group (SV *callback=&PL_sv_undef)
1113	PROTOTYPE:	1720	PROTOTYPE: ;$
1114	CODE:	1721	PPCODE:
1115	{	1722	{
1116	aio_req *req;	1723	dREQ;
1117		1724
1118	pthread_mutex_lock (&reqlock);	1725	req->type = REQ_GROUP;
1119	for (req = reqs; req; req = req->next)
1120	req->flags |= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1726
1123	pthread_mutex_lock (&reslock);	1727	req_send (req);
1124	for (req = ress; req; req = req->next)	1728	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1125	req->flags |= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}	1729	}
1128		1730
1129	#endif	1731	void
		1732	aio_nop (SV *callback=&PL_sv_undef)
		1733	PPCODE:
		1734	{
		1735	dREQ;
		1736
		1737	req->type = REQ_NOP;
		1738
		1739	REQ_SEND;
		1740	}
		1741
		1742	int
		1743	aioreq_pri (int pri = 0)
		1744	PROTOTYPE: ;$
		1745	CODE:
		1746	RETVAL = next_pri - PRI_BIAS;
		1747	if (items > 0)
		1748	{
		1749	if (pri < PRI_MIN) pri = PRI_MIN;
		1750	if (pri > PRI_MAX) pri = PRI_MAX;
		1751	next_pri = pri + PRI_BIAS;
		1752	}
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	void
		1757	aioreq_nice (int nice = 0)
		1758	CODE:
		1759	nice = next_pri - nice;
		1760	if (nice < PRI_MIN) nice = PRI_MIN;
		1761	if (nice > PRI_MAX) nice = PRI_MAX;
		1762	next_pri = nice + PRI_BIAS;
1130		1763
1131	void	1764	void
1132	flush ()	1765	flush ()
1133	PROTOTYPE:	1766	PROTOTYPE:
1134	CODE:	1767	CODE:
…		…
1136	{	1769	{
1137	poll_wait ();	1770	poll_wait ();
1138	poll_cb ();	1771	poll_cb ();
1139	}	1772	}
1140		1773
1141	void	1774	int
1142	poll()	1775	poll()
1143	PROTOTYPE:	1776	PROTOTYPE:
1144	CODE:	1777	CODE:
1145	if (nreqs)
1146	{
1147	poll_wait ();	1778	poll_wait ();
1148	poll_cb ();	1779	RETVAL = poll_cb ();
1149	}	1780	OUTPUT:
		1781	RETVAL
1150		1782
1151	int	1783	int
1152	poll_fileno()	1784	poll_fileno()
1153	PROTOTYPE:	1785	PROTOTYPE:
1154	CODE:	1786	CODE:
…		…
1166		1798
1167	void	1799	void
1168	poll_wait()	1800	poll_wait()
1169	PROTOTYPE:	1801	PROTOTYPE:
1170	CODE:	1802	CODE:
1171	if (nreqs)
1172	poll_wait ();	1803	poll_wait ();
		1804
		1805	void
		1806	setsig (int signum = SIGIO)
		1807	PROTOTYPE: ;$
		1808	CODE:
		1809	{
		1810	if (block_sig_level)
		1811	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1812
		1813	LOCK (reslock);
		1814	main_tid = pthread_self ();
		1815	main_sig = signum;
		1816	UNLOCK (reslock);
		1817
		1818	if (main_sig && npending)
		1819	pthread_kill (main_tid, main_sig);
		1820	}
		1821
		1822	void
		1823	aio_block (SV *cb)
		1824	PROTOTYPE: &
		1825	PPCODE:
		1826	{
		1827	int count;
		1828
		1829	block_sig ();
		1830	PUSHMARK (SP);
		1831	PUTBACK;
		1832	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1833	SPAGAIN;
		1834	unblock_sig ();
		1835
		1836	if (SvTRUE (ERRSV))
		1837	croak (0);
		1838
		1839	XSRETURN (count);
		1840	}
1173		1841
1174	int	1842	int
1175	nreqs()	1843	nreqs()
1176	PROTOTYPE:	1844	PROTOTYPE:
1177	CODE:	1845	CODE:
1178	RETVAL = nreqs;	1846	RETVAL = nreqs;
1179	OUTPUT:	1847	OUTPUT:
1180	RETVAL	1848	RETVAL
1181		1849
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	1850	int
1183		1851	nready()
1184	void
1185	cancel (aio_req_ornot req)
1186	PROTOTYPE:	1852	PROTOTYPE:
1187	CODE:	1853	CODE:
1188	req->cancelled = 1;	1854	RETVAL = get_nready ();
		1855	OUTPUT:
		1856	RETVAL
1189		1857
		1858	int
		1859	npending()
		1860	PROTOTYPE:
		1861	CODE:
		1862	RETVAL = get_npending ();
		1863	OUTPUT:
		1864	RETVAL
		1865
		1866	int
		1867	nthreads()
		1868	PROTOTYPE:
		1869	CODE:
		1870	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1871	RETVAL = started;
		1872	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1873	OUTPUT:
		1874	RETVAL
		1875
		1876	PROTOTYPES: DISABLE
		1877
		1878	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1879
		1880	void
		1881	cancel (aio_req_ornot req)
		1882	CODE:
		1883	req_cancel (req);
		1884
		1885	void
		1886	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1887	CODE:
		1888	SvREFCNT_dec (req->callback);
		1889	req->callback = newSVsv (callback);
		1890
		1891	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1892
		1893	void
		1894	add (aio_req grp, ...)
		1895	PPCODE:
		1896	{
		1897	int i;
		1898	aio_req req;
		1899
		1900	if (main_sig && !block_sig_level)
		1901	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1902
		1903	if (grp->int1 == 2)
		1904	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1905
		1906	for (i = 1; i < items; ++i )
		1907	{
		1908	if (GIMME_V != G_VOID)
		1909	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1910
		1911	req = SvAIO_REQ (ST (i));
		1912
		1913	if (req)
		1914	{
		1915	++grp->size;
		1916	req->grp = grp;
		1917
		1918	req->grp_prev = 0;
		1919	req->grp_next = grp->grp_first;
		1920
		1921	if (grp->grp_first)
		1922	grp->grp_first->grp_prev = req;
		1923
		1924	grp->grp_first = req;
		1925	}
		1926	}
		1927	}
		1928
		1929	void
		1930	cancel_subs (aio_req_ornot req)
		1931	CODE:
		1932	req_cancel_subs (req);
		1933
		1934	void
		1935	result (aio_req grp, ...)
		1936	CODE:
		1937	{
		1938	int i;
		1939	AV *av;
		1940
		1941	grp->errorno = errno;
		1942
		1943	av = newAV ();
		1944
		1945	for (i = 1; i < items; ++i )
		1946	av_push (av, newSVsv (ST (i)));
		1947
		1948	SvREFCNT_dec (grp->sv1);
		1949	grp->sv1 = (SV *)av;
		1950	}
		1951
		1952	void
		1953	errno (aio_req grp, int errorno = errno)
		1954	CODE:
		1955	grp->errorno = errorno;
		1956
		1957	void
		1958	limit (aio_req grp, int limit)
		1959	CODE:
		1960	grp->int2 = limit;
		1961	aio_grp_feed (grp);
		1962
		1963	void
		1964	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1965	CODE:
		1966	{
		1967	SvREFCNT_dec (grp->sv2);
		1968	grp->sv2 = newSVsv (callback);
		1969
		1970	if (grp->int2 <= 0)
		1971	grp->int2 = 2;
		1972
		1973	aio_grp_feed (grp);
		1974	}
		1975

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