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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.18 by root, Sun Jul 31 19:00:31 2005 UTC vs.
Revision 1.106 by root, Mon Sep 24 18:14:00 2007 UTC

		1	#include "xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "autoconf/config.h"	9	#include <stddef.h>
6		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9
10	#include <unistd.h>	14	#include <limits.h>
11	#include <fcntl.h>	15	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	16	#include <sched.h>
14		17
15	#ifndef _REENTRANT	18	#ifdef _WIN32
16	# define _REENTRANT 1	19
		20	# define SIGIO 0
		21	typedef Direntry_t X_DIRENT;
		22	#undef malloc
		23	#undef free
		24
		25	// perl overrides all those nice win32 functions
		26	# undef open
		27	# undef read
		28	# undef write
		29	# undef send
		30	# undef recv
		31	# undef stat
		32	# undef fstat
		33	# define lstat stat
		34	# undef truncate
		35	# undef ftruncate
		36	# undef open
		37	# undef close
		38	# undef unlink
		39	# undef rmdir
		40	# undef rename
		41	# undef lseek
		42
		43	# define chown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchown(a,b,c) (errno = ENOSYS, -1)
		45	# define fchmod(a,b) (errno = ENOSYS, -1)
		46	# define symlink(a,b) (errno = ENOSYS, -1)
		47	# define readlink(a,b,c) (errno = ENOSYS, -1)
		48	# define mknod(a,b,c) (errno = ENOSYS, -1)
		49	# define truncate(a,b) (errno = ENOSYS, -1)
		50	# define ftruncate(fd,o) chsize ((fd), (o))
		51	# define fsync(fd) _commit (fd)
		52	# define opendir(fd) (errno = ENOSYS, 0)
		53	# define readdir(fd) (errno = ENOSYS, -1)
		54	# define closedir(fd) (errno = ENOSYS, -1)
		55	# define mkdir(a,b) mkdir (a)
		56
		57	#else
		58
		59	# include "autoconf/config.h"
		60	# include <sys/time.h>
		61	# include <sys/select.h>
		62	# include <unistd.h>
		63	# include <utime.h>
		64	# include <signal.h>
		65	typedef struct dirent X_DIRENT;
		66
17	#endif	67	#endif
18	#include <errno.h>
19		68
20	#include <pthread.h>	69	#if HAVE_SENDFILE
		70	# if __linux
		71	# include <sys/sendfile.h>
		72	# elif __freebsd
		73	# include <sys/socket.h>
		74	# include <sys/uio.h>
		75	# elif __hpux
		76	# include <sys/socket.h>
		77	# elif __solaris /* not yet */
		78	# include <sys/sendfile.h>
		79	# else
		80	# error sendfile support requested but not available
		81	# endif
		82	#endif
21		83
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	84	/* number of seconds after which idle threads exit */
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	85	#define IDLE_TIMEOUT 10
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
25		86
26	#if __ia64	87	/* used for struct dirent, AIX doesn't provide it */
		88	#ifndef NAME_MAX
		89	# define NAME_MAX 4096
		90	#endif
		91
		92	/* buffer size for various temporary buffers */
27	# define STACKSIZE 65536	93	#define AIO_BUFSIZE 65536
		94
		95	/* use NV for 32 bit perls as it allows larger offsets */
		96	#if IVSIZE >= 8
		97	# define SvVAL64 SvIV
28	#else	98	#else
29	# define STACKSIZE 4096	99	# define SvVAL64 SvNV
30	#endif	100	#endif
		101
		102	#define dBUF \
		103	char *aio_buf; \
		104	X_LOCK (wrklock); \
		105	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		106	X_UNLOCK (wrklock); \
		107	if (!aio_buf) \
		108	return -1;
		109
		110	typedef SV SV8; /* byte-sv, used for argument-checking */
31		111
32	enum {	112	enum {
33	REQ_QUIT,	113	REQ_QUIT,
34	REQ_OPEN, REQ_CLOSE,	114	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,	115	REQ_READ, REQ_WRITE,
		116	REQ_READAHEAD, REQ_SENDFILE,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	117	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		118	REQ_TRUNCATE, REQ_FTRUNCATE,
		119	REQ_UTIME, REQ_FUTIME,
		120	REQ_CHMOD, REQ_FCHMOD,
		121	REQ_CHOWN, REQ_FCHOWN,
37	REQ_FSYNC, REQ_FDATASYNC,	122	REQ_FSYNC, REQ_FDATASYNC,
		123	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
		124	REQ_MKNOD, REQ_READDIR,
		125	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		126	REQ_GROUP, REQ_NOP,
		127	REQ_BUSY,
38	};	128	};
39		129
		130	#define AIO_REQ_KLASS "IO::AIO::REQ"
		131	#define AIO_GRP_KLASS "IO::AIO::GRP"
		132
40	typedef struct aio_cb {	133	typedef struct aio_cb
		134	{
41	struct aio_cb *volatile next;	135	struct aio_cb *volatile next;
42		136
		137	SV *callback;
		138	SV *sv1, *sv2;
		139	void *ptr1, *ptr2;
		140	off_t offs;
		141	size_t size;
		142	ssize_t result;
		143	double nv1, nv2;
		144
		145	STRLEN stroffset;
43	int type;	146	int type;
44		147	int int1, int2, int3;
45	int fd;	148	int errorno;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */	149	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr;
53	STRLEN dataoffset;
54		150
55	Stat_t *statdata;	151	unsigned char flags;
		152	unsigned char pri;
		153
		154	SV *self; /* the perl counterpart of this request, if any */
		155	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56	} aio_cb;	156	} aio_cb;
57		157
		158	enum {
		159	FLAG_CANCELLED = 0x01, /* request was cancelled */
		160	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		161	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		162	};
		163
58	typedef aio_cb *aio_req;	164	typedef aio_cb *aio_req;
		165	typedef aio_cb *aio_req_ornot;
59		166
60	static int started;	167	enum {
61	static volatile int nreqs;	168	PRI_MIN = -4,
62	static int max_outstanding = 1<<30;	169	PRI_MAX = 4,
63	static int respipe [2];
64		170
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	171	DEFAULT_PRI = 0,
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	172	PRI_BIAS = -PRI_MIN,
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	173	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		174	};
68		175
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	176	#define AIO_TICKS ((1000000 + 1023) >> 10)
70	static volatile aio_req ress, rese; /* queue start, queue end */
71		177
72	static void	178	static unsigned int max_poll_time = 0;
73	poll_wait ()	179	static unsigned int max_poll_reqs = 0;
		180
		181	/* calculcate time difference in ~1/AIO_TICKS of a second */
		182	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
74	{	183	{
75	if (nreqs && !ress)	184	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		185	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		186	}
		187
		188	static thread_t main_tid;
		189	static int main_sig;
		190	static int block_sig_level;
		191
		192	void block_sig ()
		193	{
		194	sigset_t ss;
		195
		196	if (block_sig_level++)
		197	return;
		198
		199	if (!main_sig)
		200	return;
		201
		202	sigemptyset (&ss);
		203	sigaddset (&ss, main_sig);
		204	pthread_sigmask (SIG_BLOCK, &ss, 0);
		205	}
		206
		207	void unblock_sig ()
		208	{
		209	sigset_t ss;
		210
		211	if (--block_sig_level)
		212	return;
		213
		214	if (!main_sig)
		215	return;
		216
		217	sigemptyset (&ss);
		218	sigaddset (&ss, main_sig);
		219	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		220	}
		221
		222	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		223
		224	static unsigned int started, idle, wanted;
		225
		226	/* worker threads management */
		227	static mutex_t wrklock = X_MUTEX_INIT;
		228
		229	typedef struct worker {
		230	/* locked by wrklock */
		231	struct worker *prev, *next;
		232
		233	thread_t tid;
		234
		235	/* locked by reslock, reqlock or wrklock */
		236	aio_req req; /* currently processed request */
		237	void *dbuf;
		238	DIR *dirp;
		239	} worker;
		240
		241	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		242
		243	static void worker_clear (worker *wrk)
		244	{
		245	if (wrk->dirp)
76	{	246	{
77	fd_set rfd;	247	closedir (wrk->dirp);
78	FD_ZERO(&rfd);	248	wrk->dirp = 0;
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	249	}
83	}
84		250
85	static int	251	if (wrk->dbuf)
86	poll_cb ()	252	{
		253	free (wrk->dbuf);
		254	wrk->dbuf = 0;
		255	}
		256	}
		257
		258	static void worker_free (worker *wrk)
		259	{
		260	wrk->next->prev = wrk->prev;
		261	wrk->prev->next = wrk->next;
		262
		263	free (wrk);
		264	}
		265
		266	static volatile unsigned int nreqs, nready, npending;
		267	static volatile unsigned int max_idle = 4;
		268	static volatile unsigned int max_outstanding = 0xffffffff;
		269	static int respipe_osf [2], respipe [2] = { -1, -1 };
		270
		271	static mutex_t reslock = X_MUTEX_INIT;
		272	static mutex_t reqlock = X_MUTEX_INIT;
		273	static cond_t reqwait = X_COND_INIT;
		274
		275	#if WORDACCESS_UNSAFE
		276
		277	static unsigned int get_nready ()
		278	{
		279	unsigned int retval;
		280
		281	X_LOCK (reqlock);
		282	retval = nready;
		283	X_UNLOCK (reqlock);
		284
		285	return retval;
		286	}
		287
		288	static unsigned int get_npending ()
		289	{
		290	unsigned int retval;
		291
		292	X_LOCK (reslock);
		293	retval = npending;
		294	X_UNLOCK (reslock);
		295
		296	return retval;
		297	}
		298
		299	static unsigned int get_nthreads ()
		300	{
		301	unsigned int retval;
		302
		303	X_LOCK (wrklock);
		304	retval = started;
		305	X_UNLOCK (wrklock);
		306
		307	return retval;
		308	}
		309
		310	#else
		311
		312	# define get_nready() nready
		313	# define get_npending() npending
		314	# define get_nthreads() started
		315
		316	#endif
		317
		318	/*
		319	* a somewhat faster data structure might be nice, but
		320	* with 8 priorities this actually needs <20 insns
		321	* per shift, the most expensive operation.
		322	*/
		323	typedef struct {
		324	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		325	int size;
		326	} reqq;
		327
		328	static reqq req_queue;
		329	static reqq res_queue;
		330
		331	int reqq_push (reqq *q, aio_req req)
		332	{
		333	int pri = req->pri;
		334	req->next = 0;
		335
		336	if (q->qe[pri])
		337	{
		338	q->qe[pri]->next = req;
		339	q->qe[pri] = req;
		340	}
		341	else
		342	q->qe[pri] = q->qs[pri] = req;
		343
		344	return q->size++;
		345	}
		346
		347	aio_req reqq_shift (reqq *q)
		348	{
		349	int pri;
		350
		351	if (!q->size)
		352	return 0;
		353
		354	--q->size;
		355
		356	for (pri = NUM_PRI; pri--; )
		357	{
		358	aio_req req = q->qs[pri];
		359
		360	if (req)
		361	{
		362	if (!(q->qs[pri] = req->next))
		363	q->qe[pri] = 0;
		364
		365	return req;
		366	}
		367	}
		368
		369	abort ();
		370	}
		371
		372	static int poll_cb ();
		373	static int req_invoke (aio_req req);
		374	static void req_destroy (aio_req req);
		375	static void req_cancel (aio_req req);
		376
		377	/* must be called at most once */
		378	static SV *req_sv (aio_req req, const char *klass)
		379	{
		380	if (!req->self)
		381	{
		382	req->self = (SV *)newHV ();
		383	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		384	}
		385
		386	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		387	}
		388
		389	static aio_req SvAIO_REQ (SV *sv)
		390	{
		391	MAGIC *mg;
		392
		393	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		394	croak ("object of class " AIO_REQ_KLASS " expected");
		395
		396	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		397
		398	return mg ? (aio_req)mg->mg_ptr : 0;
		399	}
		400
		401	static void aio_grp_feed (aio_req grp)
		402	{
		403	block_sig ();
		404
		405	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		406	{
		407	int old_len = grp->size;
		408
		409	if (grp->sv2 && SvOK (grp->sv2))
		410	{
		411	dSP;
		412
		413	ENTER;
		414	SAVETMPS;
		415	PUSHMARK (SP);
		416	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		417	PUTBACK;
		418	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		419	SPAGAIN;
		420	FREETMPS;
		421	LEAVE;
		422	}
		423
		424	/* stop if no progress has been made */
		425	if (old_len == grp->size)
		426	{
		427	SvREFCNT_dec (grp->sv2);
		428	grp->sv2 = 0;
		429	break;
		430	}
		431	}
		432
		433	unblock_sig ();
		434	}
		435
		436	static void aio_grp_dec (aio_req grp)
		437	{
		438	--grp->size;
		439
		440	/* call feeder, if applicable */
		441	aio_grp_feed (grp);
		442
		443	/* finish, if done */
		444	if (!grp->size && grp->int1)
		445	{
		446	block_sig ();
		447
		448	if (!req_invoke (grp))
		449	{
		450	req_destroy (grp);
		451	unblock_sig ();
		452	croak (0);
		453	}
		454
		455	req_destroy (grp);
		456	unblock_sig ();
		457	}
		458	}
		459
		460	static int req_invoke (aio_req req)
87	{	461	{
88	dSP;	462	dSP;
89	int count = 0;
90	aio_req req, prv;
91		463
92	pthread_mutex_lock (&reslock);	464	if (req->flags & FLAG_SV2_RO_OFF)
		465	SvREADONLY_off (req->sv2);
93		466
94	{	467	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
95	/* read any signals sent by the worker threads */
96	char buf [32];
97	while (read (respipe [0], buf, 32) > 0)
98	;
99	}
100
101	req = ress;
102	ress = rese = 0;
103
104	pthread_mutex_unlock (&reslock);
105
106	while (req)
107	{	468	{
108	nreqs--;	469	ENTER;
		470	SAVETMPS;
		471	PUSHMARK (SP);
		472	EXTEND (SP, 1);
109		473
110	if (req->type == REQ_QUIT)	474	switch (req->type)
111	started--;
112	else
113	{	475	{
114	int errorno = errno;	476	case REQ_READDIR:
115	errno = req->errorno;
116
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{	477	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	478	SV *rv = &PL_sv_undef;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132		479
133	Safefree (req->statdata);	480	if (req->result >= 0)
		481	{
		482	int i;
		483	char *buf = req->ptr2;
		484	AV *av = newAV ();
		485
		486	av_extend (av, req->result - 1);
		487
		488	for (i = 0; i < req->result; ++i)
		489	{
		490	SV *sv = newSVpv (buf, 0);
		491
		492	av_store (av, i, sv);
		493	buf += SvCUR (sv) + 1;
		494	}
		495
		496	rv = sv_2mortal (newRV_noinc ((SV *)av));
		497	}
		498
		499	PUSHs (rv);
134	}	500	}
		501	break;
135		502
136	ENTER;	503	case REQ_OPEN:
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{	504	{
142	/* convert fd to fh */	505	/* convert fd to fh */
143	SV *fh;	506	SV *fh;
144		507
		508	PUSHs (sv_2mortal (newSViv (req->result)));
145	PUTBACK;	509	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	510	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147	SPAGAIN;	511	SPAGAIN;
148		512
149	fh = SvREFCNT_inc (POPs);	513	fh = POPs;
150
151	PUSHMARK (SP);	514	PUSHMARK (SP);
152	XPUSHs (sv_2mortal (fh));	515	XPUSHs (fh);
153	}	516	}
		517	break;
154		518
155	if (SvOK (req->callback))	519	case REQ_GROUP:
		520	req->int1 = 2; /* mark group as finished */
		521
		522	if (req->sv1)
156	{	523	{
157	PUTBACK;	524	int i;
158	call_sv (req->callback, G_VOID | G_EVAL);	525	AV *av = (AV *)req->sv1;
159	SPAGAIN;	526
		527	EXTEND (SP, AvFILL (av) + 1);
		528	for (i = 0; i <= AvFILL (av); ++i)
		529	PUSHs (*av_fetch (av, i, 0));
160	}	530	}
		531	break;
161		532
162	LEAVE;	533	case REQ_NOP:
		534	case REQ_BUSY:
		535	break;
		536
		537	case REQ_READLINK:
		538	if (req->result > 0)
163		539	{
164	if (req->callback)	540	SvCUR_set (req->sv2, req->result);
165	SvREFCNT_dec (req->callback);	541	*SvEND (req->sv2) = 0;
		542	PUSHs (req->sv2);
		543	}
		544	break;
166		545
167	errno = errorno;	546	case REQ_STAT:
168	count++;	547	case REQ_LSTAT:
		548	case REQ_FSTAT:
		549	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		550	PL_laststatval = req->result;
		551	PL_statcache = *(Stat_t *)(req->ptr2);
		552	PUSHs (sv_2mortal (newSViv (req->result)));
		553	break;
		554
		555	case REQ_READ:
		556	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		557	*SvEND (req->sv2) = 0;
		558	PUSHs (sv_2mortal (newSViv (req->result)));
		559	break;
		560
		561	default:
		562	PUSHs (sv_2mortal (newSViv (req->result)));
		563	break;
169	}	564	}
170		565
171	prv = req;	566	errno = req->errorno;
172	req = req->next;
173	Safefree (prv);
174		567
175	/* TODO: croak on errors? */	568	PUTBACK;
		569	call_sv (req->callback, G_VOID | G_EVAL);
		570	SPAGAIN;
		571
		572	FREETMPS;
		573	LEAVE;
176	}	574	}
177		575
178	return count;	576	if (req->grp)
179	}	577	{
		578	aio_req grp = req->grp;
180		579
181	static void *aio_proc(void *arg);	580	/* unlink request */
		581	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		582	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		583
		584	if (grp->grp_first == req)
		585	grp->grp_first = req->grp_next;
		586
		587	aio_grp_dec (grp);
		588	}
		589
		590	return !SvTRUE (ERRSV);
		591	}
		592
		593	static void req_destroy (aio_req req)
		594	{
		595	if (req->self)
		596	{
		597	sv_unmagic (req->self, PERL_MAGIC_ext);
		598	SvREFCNT_dec (req->self);
		599	}
		600
		601	SvREFCNT_dec (req->sv1);
		602	SvREFCNT_dec (req->sv2);
		603	SvREFCNT_dec (req->callback);
		604
		605	if (req->flags & FLAG_PTR2_FREE)
		606	free (req->ptr2);
		607
		608	Safefree (req);
		609	}
		610
		611	static void req_cancel_subs (aio_req grp)
		612	{
		613	aio_req sub;
		614
		615	if (grp->type != REQ_GROUP)
		616	return;
		617
		618	SvREFCNT_dec (grp->sv2);
		619	grp->sv2 = 0;
		620
		621	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		622	req_cancel (sub);
		623	}
		624
		625	static void req_cancel (aio_req req)
		626	{
		627	req->flags |= FLAG_CANCELLED;
		628
		629	req_cancel_subs (req);
		630	}
		631
		632	#ifdef USE_SOCKETS_AS_HANDLES
		633	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		634	#else
		635	# define TO_SOCKET(x) (x)
		636	#endif
182		637
183	static void	638	static void
184	start_thread (void)	639	create_respipe ()
185	{	640	{
186	sigset_t fullsigset, oldsigset;	641	int old_readfd = respipe [0];
187	pthread_t tid;
188	pthread_attr_t attr;
189		642
190	pthread_attr_init (&attr);	643	if (respipe [1] >= 0)
191	pthread_attr_setstacksize (&attr, STACKSIZE);	644	respipe_close (TO_SOCKET (respipe [1]));
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193		645
194	sigfillset (&fullsigset);	646	#ifdef _WIN32
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	647	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		648	#else
		649	if (pipe (respipe))
		650	#endif
		651	croak ("unable to initialize result pipe");
196		652
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	653	if (old_readfd >= 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{	654	{
214	reqe->next = req;	655	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
215	reqe = req;	656	croak ("unable to initialize result pipe(2)");
		657
		658	respipe_close (respipe [0]);
		659	respipe [0] = old_readfd;
		660	}
		661
		662	#ifdef _WIN32
		663	int arg = 1;
		664	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		665	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		666	#else
		667	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		668	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		669	#endif
		670	croak ("unable to initialize result pipe(3)");
		671
		672	respipe_osf [0] = TO_SOCKET (respipe [0]);
		673	respipe_osf [1] = TO_SOCKET (respipe [1]);
		674	}
		675
		676	X_THREAD_PROC (aio_proc);
		677
		678	static void start_thread (void)
		679	{
		680	worker *wrk = calloc (1, sizeof (worker));
		681
		682	if (!wrk)
		683	croak ("unable to allocate worker thread data");
		684
		685	X_LOCK (wrklock);
		686
		687	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
		688	{
		689	wrk->prev = &wrk_first;
		690	wrk->next = wrk_first.next;
		691	wrk_first.next->prev = wrk;
		692	wrk_first.next = wrk;
		693	++started;
216	}	694	}
217	else	695	else
218	reqe = reqs = req;	696	free (wrk);
219		697
220	pthread_cond_signal (&reqwait);	698	X_UNLOCK (wrklock);
221	pthread_mutex_unlock (&reqlock);	699	}
222		700
223	while (nreqs > max_outstanding)	701	static void maybe_start_thread ()
		702	{
		703	if (get_nthreads () >= wanted)
		704	return;
		705
		706	/* todo: maybe use idle here, but might be less exact */
		707	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		708	return;
		709
		710	start_thread ();
		711	}
		712
		713	static void req_send (aio_req req)
		714	{
		715	block_sig ();
		716
		717	++nreqs;
		718
		719	X_LOCK (reqlock);
		720	++nready;
		721	reqq_push (&req_queue, req);
		722	X_COND_SIGNAL (reqwait);
		723	X_UNLOCK (reqlock);
		724
		725	unblock_sig ();
		726
		727	maybe_start_thread ();
		728	}
		729
		730	static void end_thread (void)
		731	{
		732	aio_req req;
		733
		734	Newz (0, req, 1, aio_cb);
		735
		736	req->type = REQ_QUIT;
		737	req->pri = PRI_MAX + PRI_BIAS;
		738
		739	X_LOCK (reqlock);
		740	reqq_push (&req_queue, req);
		741	X_COND_SIGNAL (reqwait);
		742	X_UNLOCK (reqlock);
		743
		744	X_LOCK (wrklock);
		745	--started;
		746	X_UNLOCK (wrklock);
		747	}
		748
		749	static void set_max_idle (int nthreads)
		750	{
		751	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		752	max_idle = nthreads <= 0 ? 1 : nthreads;
		753	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		754	}
		755
		756	static void min_parallel (int nthreads)
		757	{
		758	if (wanted < nthreads)
		759	wanted = nthreads;
		760	}
		761
		762	static void max_parallel (int nthreads)
		763	{
		764	if (wanted > nthreads)
		765	wanted = nthreads;
		766
		767	while (started > wanted)
		768	end_thread ();
		769	}
		770
		771	static void poll_wait ()
		772	{
		773	fd_set rfd;
		774
		775	while (nreqs)
224	{	776	{
		777	int size;
		778	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		779	size = res_queue.size;
		780	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		781
		782	if (size)
		783	return;
		784
		785	maybe_start_thread ();
		786
		787	FD_ZERO (&rfd);
		788	FD_SET (respipe [0], &rfd);
		789
		790	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		791	}
		792	}
		793
		794	static int poll_cb ()
		795	{
		796	dSP;
		797	int count = 0;
		798	int maxreqs = max_poll_reqs;
		799	int do_croak = 0;
		800	struct timeval tv_start, tv_now;
		801	aio_req req;
		802
		803	if (max_poll_time)
		804	gettimeofday (&tv_start, 0);
		805
		806	block_sig ();
		807
		808	for (;;)
		809	{
		810	for (;;)
		811	{
		812	maybe_start_thread ();
		813
		814	X_LOCK (reslock);
		815	req = reqq_shift (&res_queue);
		816
		817	if (req)
		818	{
		819	--npending;
		820
		821	if (!res_queue.size)
		822	{
		823	/* read any signals sent by the worker threads */
		824	char buf [4];
		825	while (respipe_read (respipe [0], buf, 4) == 4)
		826	;
		827	}
		828	}
		829
		830	X_UNLOCK (reslock);
		831
		832	if (!req)
		833	break;
		834
		835	--nreqs;
		836
		837	if (req->type == REQ_GROUP && req->size)
		838	{
		839	req->int1 = 1; /* mark request as delayed */
		840	continue;
		841	}
		842	else
		843	{
		844	if (!req_invoke (req))
		845	{
		846	req_destroy (req);
		847	unblock_sig ();
		848	croak (0);
		849	}
		850
		851	count++;
		852	}
		853
		854	req_destroy (req);
		855
		856	if (maxreqs && !--maxreqs)
		857	break;
		858
		859	if (max_poll_time)
		860	{
		861	gettimeofday (&tv_now, 0);
		862
		863	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		864	break;
		865	}
		866	}
		867
		868	if (nreqs <= max_outstanding)
		869	break;
		870
225	poll_wait ();	871	poll_wait ();
226	poll_cb ();	872
		873	++maxreqs;
227	}	874	}
228	}
229		875
230	static void	876	unblock_sig ();
231	end_thread (void)	877	return count;
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}	878	}
239		879
		880	/*****************************************************************************/
240	/* work around various missing functions */	881	/* work around various missing functions */
241		882
242	#if !HAVE_PREADWRITE	883	#if !HAVE_PREADWRITE
243	# define pread aio_pread	884	# define pread aio_pread
244	# define pwrite aio_pwrite	885	# define pwrite aio_pwrite
…		…
246	/*	887	/*
247	* make our pread/pwrite safe against themselves, but not against	888	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,	889	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.	890	* but that's your problem, not mine.
250	*/	891	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	892	static mutex_t preadwritelock = X_MUTEX_INIT;
252		893
253	static ssize_t	894	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{	895	{
256	ssize_t res;	896	ssize_t res;
257	off_t ooffset;	897	off_t ooffset;
258		898
259	pthread_mutex_lock (&iolock);	899	X_LOCK (preadwritelock);
260	ooffset = lseek (fd, 0, SEEK_CUR);	900	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);	901	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);	902	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);	903	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);	904	X_UNLOCK (preadwritelock);
265		905
266	return res;	906	return res;
267	}	907	}
268		908
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)	909	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
271	{	910	{
272	ssize_t res;	911	ssize_t res;
273	off_t ooffset;	912	off_t ooffset;
274		913
275	pthread_mutex_lock (&iolock);	914	X_LOCK (preadwritelock);
276	ooffset = lseek (fd, 0, SEEK_CUR);	915	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);	916	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);	917	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);	918	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);	919	X_UNLOCK (preadwritelock);
281		920
282	return res;	921	return res;
283	}	922	}
		923	#endif
		924
		925	#ifndef HAVE_FUTIMES
		926
		927	# define utimes(path,times) aio_utimes (path, times)
		928	# define futimes(fd,times) aio_futimes (fd, times)
		929
		930	int aio_utimes (const char *filename, const struct timeval times[2])
		931	{
		932	if (times)
		933	{
		934	struct utimbuf buf;
		935
		936	buf.actime = times[0].tv_sec;
		937	buf.modtime = times[1].tv_sec;
		938
		939	return utime (filename, &buf);
		940	}
		941	else
		942	return utime (filename, 0);
		943	}
		944
		945	int aio_futimes (int fd, const struct timeval tv[2])
		946	{
		947	errno = ENOSYS;
		948	return -1;
		949	}
		950
284	#endif	951	#endif
285		952
286	#if !HAVE_FDATASYNC	953	#if !HAVE_FDATASYNC
287	# define fdatasync fsync	954	# define fdatasync fsync
288	#endif	955	#endif
289		956
290	#if !HAVE_READAHEAD	957	#if !HAVE_READAHEAD
291	# define readahead aio_readahead	958	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
292		959
293	static char readahead_buf[4096];	960	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{	961	{
		962	size_t todo = count;
		963	dBUF;
		964
298	while (count > 0)	965	while (todo > 0)
299	{	966	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	967	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
301		968
302	pread (fd, readahead_buf, len, offset);	969	pread (fd, aio_buf, len, offset);
303	offset += len;	970	offset += len;
304	count -= len;	971	todo -= len;
305	}	972	}
306		973
307	errno = 0;	974	errno = 0;
		975	return count;
308	}	976	}
		977
309	#endif	978	#endif
310		979
311	static void *	980	#if !HAVE_READDIR_R
312	aio_proc (void *thr_arg)	981	# define readdir_r aio_readdir_r
		982
		983	static mutex_t readdirlock = X_MUTEX_INIT;
		984
		985	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
313	{	986	{
		987	X_DIRENT *e;
		988	int errorno;
		989
		990	X_LOCK (readdirlock);
		991
		992	e = readdir (dirp);
		993	errorno = errno;
		994
		995	if (e)
		996	{
		997	*res = ent;
		998	strcpy (ent->d_name, e->d_name);
		999	}
		1000	else
		1001	*res = 0;
		1002
		1003	X_UNLOCK (readdirlock);
		1004
		1005	errno = errorno;
		1006	return e ? 0 : -1;
		1007	}
		1008	#endif
		1009
		1010	/* sendfile always needs emulation */
		1011	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		1012	{
		1013	ssize_t res;
		1014
		1015	if (!count)
		1016	return 0;
		1017
		1018	#if HAVE_SENDFILE
		1019	# if __linux
		1020	res = sendfile (ofd, ifd, &offset, count);
		1021
		1022	# elif __freebsd
		1023	/*
		1024	* Of course, the freebsd sendfile is a dire hack with no thoughts
		1025	* wasted on making it similar to other I/O functions.
		1026	*/
		1027	{
		1028	off_t sbytes;
		1029	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		1030
		1031	if (res < 0 && sbytes)
		1032	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		1033	res = sbytes;
		1034	}
		1035
		1036	# elif __hpux
		1037	res = sendfile (ofd, ifd, offset, count, 0, 0);
		1038
		1039	# elif __solaris
		1040	{
		1041	struct sendfilevec vec;
		1042	size_t sbytes;
		1043
		1044	vec.sfv_fd = ifd;
		1045	vec.sfv_flag = 0;
		1046	vec.sfv_off = offset;
		1047	vec.sfv_len = count;
		1048
		1049	res = sendfilev (ofd, &vec, 1, &sbytes);
		1050
		1051	if (res < 0 && sbytes)
		1052	res = sbytes;
		1053	}
		1054
		1055	# endif
		1056	#else
		1057	res = -1;
		1058	errno = ENOSYS;
		1059	#endif
		1060
		1061	if (res < 0
		1062	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1063	#if __solaris
		1064	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		1065	#endif
		1066	)
		1067	)
		1068	{
		1069	/* emulate sendfile. this is a major pain in the ass */
		1070	dBUF;
		1071
		1072	res = 0;
		1073
		1074	while (count)
		1075	{
		1076	ssize_t cnt;
		1077
		1078	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		1079
		1080	if (cnt <= 0)
		1081	{
		1082	if (cnt && !res) res = -1;
		1083	break;
		1084	}
		1085
		1086	cnt = write (ofd, aio_buf, cnt);
		1087
		1088	if (cnt <= 0)
		1089	{
		1090	if (cnt && !res) res = -1;
		1091	break;
		1092	}
		1093
		1094	offset += cnt;
		1095	res += cnt;
		1096	count -= cnt;
		1097	}
		1098	}
		1099
		1100	return res;
		1101	}
		1102
		1103	/* read a full directory */
		1104	static void scandir_ (aio_req req, worker *self)
		1105	{
		1106	DIR *dirp;
		1107	union
		1108	{
		1109	X_DIRENT d;
		1110	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
		1111	} *u;
		1112	X_DIRENT *entp;
		1113	char *name, *names;
		1114	int memlen = 4096;
		1115	int memofs = 0;
		1116	int res = 0;
		1117
		1118	X_LOCK (wrklock);
		1119	self->dirp = dirp = opendir (req->ptr1);
		1120	self->dbuf = u = malloc (sizeof (*u));
		1121	req->flags |= FLAG_PTR2_FREE;
		1122	req->ptr2 = names = malloc (memlen);
		1123	X_UNLOCK (wrklock);
		1124
		1125	if (dirp && u && names)
		1126	for (;;)
		1127	{
		1128	errno = 0;
		1129	readdir_r (dirp, &u->d, &entp);
		1130
		1131	if (!entp)
		1132	break;
		1133
		1134	name = entp->d_name;
		1135
		1136	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1137	{
		1138	int len = strlen (name) + 1;
		1139
		1140	res++;
		1141
		1142	while (memofs + len > memlen)
		1143	{
		1144	memlen *= 2;
		1145	X_LOCK (wrklock);
		1146	req->ptr2 = names = realloc (names, memlen);
		1147	X_UNLOCK (wrklock);
		1148
		1149	if (!names)
		1150	break;
		1151	}
		1152
		1153	memcpy (names + memofs, name, len);
		1154	memofs += len;
		1155	}
		1156	}
		1157
		1158	if (errno)
		1159	res = -1;
		1160
		1161	req->result = res;
		1162	}
		1163
		1164	/*****************************************************************************/
		1165
		1166	X_THREAD_PROC (aio_proc)
		1167	{
		1168	{//D
314	aio_req req;	1169	aio_req req;
315	int type;	1170	struct timespec ts;
		1171	worker *self = (worker *)thr_arg;
316		1172
317	do	1173	/* try to distribute timeouts somewhat randomly */
		1174	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
		1175
		1176	for (;;)
318	{	1177	{
319	pthread_mutex_lock (&reqlock);	1178	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1179
		1180	X_LOCK (reqlock);
320		1181
321	for (;;)	1182	for (;;)
322	{	1183	{
323	req = reqs;	1184	self->req = req = reqq_shift (&req_queue);
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330		1185
331	if (req)	1186	if (req)
332	break;	1187	break;
333		1188
334	pthread_cond_wait (&reqwait, &reqlock);	1189	++idle;
		1190
		1191	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
		1192	== ETIMEDOUT)
		1193	{
		1194	if (idle > max_idle)
		1195	{
		1196	--idle;
		1197	X_UNLOCK (reqlock);
		1198	X_LOCK (wrklock);
		1199	--started;
		1200	X_UNLOCK (wrklock);
		1201	goto quit;
		1202	}
		1203
		1204	/* we are allowed to idle, so do so without any timeout */
		1205	X_COND_WAIT (reqwait, reqlock);
		1206	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1207	}
		1208
		1209	--idle;
335	}	1210	}
336		1211
337	pthread_mutex_unlock (&reqlock);	1212	--nready;
		1213
		1214	X_UNLOCK (reqlock);
338		1215
339	errno = 0; /* strictly unnecessary */	1216	errno = 0; /* strictly unnecessary */
340		1217
341	type = req->type;	1218	if (!(req->flags & FLAG_CANCELLED))
342
343	switch (type)	1219	switch (req->type)
		1220	{
		1221	case REQ_READ: req->result = req->offs >= 0
		1222	? pread (req->int1, req->ptr1, req->size, req->offs)
		1223	: read (req->int1, req->ptr1, req->size); break;
		1224	case REQ_WRITE: req->result = req->offs >= 0
		1225	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1226	: write (req->int1, req->ptr1, req->size); break;
		1227
		1228	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1229	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1230
		1231	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1232	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1233	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1234
		1235	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1236	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1237	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1238	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1239	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1240	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1241
		1242	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1243	case REQ_CLOSE: req->result = close (req->int1); break;
		1244	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1245	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1246	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1247	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1248	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1249	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1250	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1251	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1252
		1253	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1254	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1255	case REQ_READDIR: scandir_ (req, self); break;
		1256
		1257	case REQ_BUSY:
		1258	#ifdef _WIN32
		1259	Sleep (req->nv1 * 1000.);
		1260	#else
		1261	{
		1262	struct timeval tv;
		1263
		1264	tv.tv_sec = req->nv1;
		1265	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1266
		1267	req->result = select (0, 0, 0, 0, &tv);
		1268	}
		1269	#endif
		1270	break;
		1271
		1272	case REQ_UTIME:
		1273	case REQ_FUTIME:
		1274	{
		1275	struct timeval tv[2];
		1276	struct timeval *times;
		1277
		1278	if (req->nv1 != -1. || req->nv2 != -1.)
		1279	{
		1280	tv[0].tv_sec = req->nv1;
		1281	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1282	tv[1].tv_sec = req->nv2;
		1283	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1284
		1285	times = tv;
		1286	}
		1287	else
		1288	times = 0;
		1289
		1290
		1291	req->result = req->type == REQ_FUTIME
		1292	? futimes (req->int1, times)
		1293	: utimes (req->ptr1, times);
		1294	}
		1295
		1296	case REQ_GROUP:
		1297	case REQ_NOP:
		1298	break;
		1299
		1300	case REQ_QUIT:
		1301	goto quit;
		1302
		1303	default:
		1304	req->result = -1;
		1305	break;
		1306	}
		1307
		1308	req->errorno = errno;
		1309
		1310	X_LOCK (reslock);
		1311
		1312	++npending;
		1313
		1314	if (!reqq_push (&res_queue, req))
344	{	1315	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1316	/* write a dummy byte to the pipe so fh becomes ready */
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1317	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
347		1318
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1319	/* optionally signal the main thread asynchronously */
349		1320	if (main_sig)
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1321	pthread_kill (main_tid, main_sig);
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:
362	break;
363
364	default:
365	req->result = ENOSYS;
366	break;
367	}	1322	}
368		1323
369	req->errorno = errno;	1324	self->req = 0;
		1325	worker_clear (self);
370		1326
371	pthread_mutex_lock (&reslock);	1327	X_UNLOCK (reslock);
372
373	req->next = 0;
374
375	if (rese)
376	{
377	rese->next = req;
378	rese = req;
379	}
380	else
381	{
382	rese = ress = req;
383
384	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);
386	}
387
388	pthread_mutex_unlock (&reslock);
389	}	1328	}
390	while (type != REQ_QUIT);	1329
		1330	quit:
		1331	X_LOCK (wrklock);
		1332	worker_free (self);
		1333	X_UNLOCK (wrklock);
391		1334
392	return 0;	1335	return 0;
		1336	}//D
393	}	1337	}
394		1338
		1339	/*****************************************************************************/
		1340
		1341	static void atfork_prepare (void)
		1342	{
		1343	X_LOCK (wrklock);
		1344	X_LOCK (reqlock);
		1345	X_LOCK (reslock);
		1346	#if !HAVE_PREADWRITE
		1347	X_LOCK (preadwritelock);
		1348	#endif
		1349	#if !HAVE_READDIR_R
		1350	X_LOCK (readdirlock);
		1351	#endif
		1352	}
		1353
		1354	static void atfork_parent (void)
		1355	{
		1356	#if !HAVE_READDIR_R
		1357	X_UNLOCK (readdirlock);
		1358	#endif
		1359	#if !HAVE_PREADWRITE
		1360	X_UNLOCK (preadwritelock);
		1361	#endif
		1362	X_UNLOCK (reslock);
		1363	X_UNLOCK (reqlock);
		1364	X_UNLOCK (wrklock);
		1365	}
		1366
		1367	static void atfork_child (void)
		1368	{
		1369	aio_req prv;
		1370
		1371	while (prv = reqq_shift (&req_queue))
		1372	req_destroy (prv);
		1373
		1374	while (prv = reqq_shift (&res_queue))
		1375	req_destroy (prv);
		1376
		1377	while (wrk_first.next != &wrk_first)
		1378	{
		1379	worker *wrk = wrk_first.next;
		1380
		1381	if (wrk->req)
		1382	req_destroy (wrk->req);
		1383
		1384	worker_clear (wrk);
		1385	worker_free (wrk);
		1386	}
		1387
		1388	started = 0;
		1389	idle = 0;
		1390	nreqs = 0;
		1391	nready = 0;
		1392	npending = 0;
		1393
		1394	create_respipe ();
		1395
		1396	atfork_parent ();
		1397	}
		1398
		1399	#define dREQ \
		1400	aio_req req; \
		1401	int req_pri = next_pri; \
		1402	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1403	\
		1404	if (SvOK (callback) && !SvROK (callback)) \
		1405	croak ("callback must be undef or of reference type"); \
		1406	\
		1407	Newz (0, req, 1, aio_cb); \
		1408	if (!req) \
		1409	croak ("out of memory during aio_req allocation"); \
		1410	\
		1411	req->callback = newSVsv (callback); \
		1412	req->pri = req_pri
		1413
		1414	#define REQ_SEND \
		1415	req_send (req); \
		1416	\
		1417	if (GIMME_V != G_VOID) \
		1418	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1419
395	MODULE = IO::AIO PACKAGE = IO::AIO	1420	MODULE = IO::AIO PACKAGE = IO::AIO
396		1421
397	PROTOTYPES: ENABLE	1422	PROTOTYPES: ENABLE
398		1423
399	BOOT:	1424	BOOT:
400	{	1425	{
401	if (pipe (respipe))	1426	HV *stash = gv_stashpv ("IO::AIO", 1);
402	croak ("unable to initialize result pipe");
403		1427
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1428	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
405	croak ("cannot set result pipe to nonblocking mode");	1429	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1430	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1431	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1432	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1433	#ifdef _WIN32
		1434	X_MUTEX_CHECK (wrklock);
		1435	X_MUTEX_CHECK (reslock);
		1436	X_MUTEX_CHECK (reqlock);
		1437	X_MUTEX_CHECK (reqwait);
		1438	X_MUTEX_CHECK (preadwritelock);
		1439	X_MUTEX_CHECK (readdirlock);
406		1440
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1441	X_COND_CHECK (reqwait);
408	croak ("cannot set result pipe to nonblocking mode");	1442	#else
409	}	1443	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1444	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1445	#endif
410		1446
		1447	create_respipe ();
		1448
		1449	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
		1450	}
		1451
411	void	1452	void
412	min_parallel(nthreads)	1453	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	1454	PROTOTYPE: $
415	CODE:	1455	CODE:
416	while (nthreads > started)	1456	max_poll_reqs = nreqs;
417	start_thread ();
418		1457
419	void	1458	void
420	max_parallel(nthreads)	1459	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	1460	PROTOTYPE: $
423	CODE:	1461	CODE:
424	{	1462	max_poll_time = nseconds * AIO_TICKS;
425	int cur = started;
426	while (cur > nthreads)
427	{
428	end_thread ();
429	cur--;
430	}
431		1463
432	while (started > nthreads)	1464	void
433	{	1465	min_parallel (int nthreads)
434	poll_wait ();	1466	PROTOTYPE: $
435	poll_cb ();	1467
436	}	1468	void
437	}	1469	max_parallel (int nthreads)
		1470	PROTOTYPE: $
		1471
		1472	void
		1473	max_idle (int nthreads)
		1474	PROTOTYPE: $
		1475	CODE:
		1476	set_max_idle (nthreads);
438		1477
439	int	1478	int
440	max_outstanding(nreqs)	1479	max_outstanding (int maxreqs)
441	int nreqs	1480	PROTOTYPE: $
442	PROTOTYPE: $
443	CODE:	1481	CODE:
444	RETVAL = max_outstanding;	1482	RETVAL = max_outstanding;
445	max_outstanding = nreqs;	1483	max_outstanding = maxreqs;
		1484	OUTPUT:
		1485	RETVAL
446		1486
447	void	1487	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1488	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
449	SV * pathname
450	int flags
451	int mode
452	SV * callback
453	PROTOTYPE: $$$;$	1489	PROTOTYPE: $$$;$
454	CODE:	1490	PPCODE:
455	{	1491	{
456	aio_req req;	1492	dREQ;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462		1493
463	req->type = REQ_OPEN;	1494	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);	1495	req->sv1 = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);	1496	req->ptr1 = SvPVbyte_nolen (req->sv1);
466	req->fd = flags;	1497	req->int1 = flags;
467	req->mode = mode;	1498	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469		1499
470	send_req (req);	1500	REQ_SEND;
471	}	1501	}
472		1502
473	void	1503	void
474	aio_close(fh,callback=&PL_sv_undef)	1504	aio_close (SV *fh, SV *callback=&PL_sv_undef)
475	SV * fh
476	SV * callback
477	PROTOTYPE: $;$	1505	PROTOTYPE: $;$
478	ALIAS:	1506	ALIAS:
479	aio_close = REQ_CLOSE	1507	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC	1508	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC	1509	aio_fdatasync = REQ_FDATASYNC
482	CODE:	1510	PPCODE:
483	{	1511	{
484	aio_req req;	1512	dREQ;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490		1513
491	req->type = ix;	1514	req->type = ix;
492	req->fh = newSVsv (fh);	1515	req->sv1 = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495		1517
496	send_req (req);	1518	REQ_SEND (req);
497	}	1519	}
498		1520
499	void	1521	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1522	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
501	SV * fh
502	UV offset
503	IV length
504	SV * data
505	IV dataoffset
506	SV * callback
507	ALIAS:	1523	ALIAS:
508	aio_read = REQ_READ	1524	aio_read = REQ_READ
509	aio_write = REQ_WRITE	1525	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$	1526	PROTOTYPE: $$$$$;$
511	CODE:	1527	PPCODE:
512	{	1528	{
513	aio_req req;
514	STRLEN svlen;	1529	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);	1530	char *svptr = SvPVbyte (data, svlen);
		1531	UV len = SvUV (length);
516		1532
517	SvUPGRADE (data, SVt_PV);	1533	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);	1534	SvPOK_on (data);
519		1535
520	if (dataoffset < 0)	1536	if (dataoffset < 0)
521	dataoffset += svlen;	1537	dataoffset += svlen;
522		1538
523	if (dataoffset < 0 || dataoffset > svlen)	1539	if (dataoffset < 0 || dataoffset > svlen)
524	croak ("data offset outside of string");	1540	croak ("dataoffset outside of data scalar");
525		1541
526	if (ix == REQ_WRITE)	1542	if (ix == REQ_WRITE)
527	{	1543	{
528	/* write: check length and adjust. */	1544	/* write: check length and adjust. */
529	if (length < 0 || length + dataoffset > svlen)	1545	if (!SvOK (length) || len + dataoffset > svlen)
530	length = svlen - dataoffset;	1546	len = svlen - dataoffset;
531	}	1547	}
532	else	1548	else
533	{	1549	{
534	/* read: grow scalar as necessary */	1550	/* read: grow scalar as necessary */
535	svptr = SvGROW (data, length + dataoffset);	1551	svptr = SvGROW (data, len + dataoffset + 1);
536	}	1552	}
537		1553
538	if (length < 0)	1554	if (len < 0)
539	croak ("length must not be negative");	1555	croak ("length must not be negative");
540		1556
541	Newz (0, req, 1, aio_cb);	1557	{
		1558	dREQ;
542		1559
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;	1560	req->type = ix;
547	req->fh = newSVsv (fh);	1561	req->sv1 = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1562	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));	1563	: IoOFP (sv_2io (fh)));
550	req->offset = offset;	1564	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
551	req->length = length;	1565	req->size = len;
552	req->data = SvREFCNT_inc (data);	1566	req->sv2 = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;	1567	req->ptr1 = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);	1568	req->stroffset = dataoffset;
555		1569
556	send_req (req);	1570	if (!SvREADONLY (data))
557	}	1571	{
		1572	SvREADONLY_on (data);
		1573	req->flags |= FLAG_SV2_RO_OFF;
		1574	}
558		1575
		1576	REQ_SEND;
		1577	}
		1578	}
		1579
559	void	1580	void
		1581	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1582	PROTOTYPE: $$;$
		1583	PPCODE:
		1584	{
		1585	SV *data;
		1586	dREQ;
		1587
		1588	data = newSV (NAME_MAX);
		1589	SvPOK_on (data);
		1590
		1591	req->type = REQ_READLINK;
		1592	req->sv1 = newSVsv (path);
		1593	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1594	req->sv2 = data;
		1595	req->ptr1 = SvPVbyte_nolen (data);
		1596
		1597	REQ_SEND;
		1598	}
		1599
		1600	void
		1601	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		1602	PROTOTYPE: $$$$;$
		1603	PPCODE:
		1604	{
		1605	dREQ;
		1606
		1607	req->type = REQ_SENDFILE;
		1608	req->sv1 = newSVsv (out_fh);
		1609	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1610	req->sv2 = newSVsv (in_fh);
		1611	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1612	req->offs = SvVAL64 (in_offset);
		1613	req->size = length;
		1614
		1615	REQ_SEND;
		1616	}
		1617
		1618	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1619	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
561	SV * fh
562	UV offset
563	IV length
564	SV * callback
565	PROTOTYPE: $$$;$	1620	PROTOTYPE: $$$;$
566	CODE:	1621	PPCODE:
567	{	1622	{
568	aio_req req;	1623	dREQ;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577		1624
578	req->type = REQ_READAHEAD;	1625	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);	1626	req->sv1 = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1627	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;	1628	req->offs = SvVAL64 (offset);
582	req->length = length;	1629	req->size = length;
583	req->callback = SvREFCNT_inc (callback);
584		1630
585	send_req (req);	1631	REQ_SEND;
586	}	1632	}
587		1633
588	void	1634	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)	1635	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
590	SV * fh_or_path
591	SV * callback
592	ALIAS:	1636	ALIAS:
593	aio_stat = REQ_STAT	1637	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT	1638	aio_lstat = REQ_LSTAT
595	CODE:	1639	PPCODE:
596	{	1640	{
597	aio_req req;	1641	dREQ;
598		1642
599	Newz (0, req, 1, aio_cb);	1643	req->ptr2 = malloc (sizeof (Stat_t));
600
601	if (!req)	1644	if (!req->ptr2)
602	croak ("out of memory during aio_req allocation");	1645	{
603		1646	req_destroy (req);
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");	1647	croak ("out of memory during aio_stat statdata allocation");
		1648	}
		1649
		1650	req->flags |= FLAG_PTR2_FREE;
		1651	req->sv1 = newSVsv (fh_or_path);
608		1652
609	if (SvPOK (fh_or_path))	1653	if (SvPOK (fh_or_path))
610	{	1654	{
611	req->type = ix;	1655	req->type = ix;
612	req->data = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);	1656	req->ptr1 = SvPVbyte_nolen (req->sv1);
614	}	1657	}
615	else	1658	else
616	{	1659	{
617	req->type = REQ_FSTAT;	1660	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1661	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}	1662	}
621		1663
622	req->callback = SvREFCNT_inc (callback);	1664	REQ_SEND;
623
624	send_req (req);
625	}	1665	}
626		1666
627	void	1667	void
		1668	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1669	PPCODE:
		1670	{
		1671	dREQ;
		1672
		1673	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1674	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1675	req->sv1 = newSVsv (fh_or_path);
		1676
		1677	if (SvPOK (fh_or_path))
		1678	{
		1679	req->type = REQ_UTIME;
		1680	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1681	}
		1682	else
		1683	{
		1684	req->type = REQ_FUTIME;
		1685	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1686	}
		1687
		1688	REQ_SEND;
		1689	}
		1690
		1691	void
		1692	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1693	PPCODE:
		1694	{
		1695	dREQ;
		1696
		1697	req->sv1 = newSVsv (fh_or_path);
		1698	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1699
		1700	if (SvPOK (fh_or_path))
		1701	{
		1702	req->type = REQ_TRUNCATE;
		1703	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1704	}
		1705	else
		1706	{
		1707	req->type = REQ_FTRUNCATE;
		1708	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1709	}
		1710
		1711	REQ_SEND;
		1712	}
		1713
		1714	void
		1715	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1716	PPCODE:
		1717	{
		1718	dREQ;
		1719
		1720	req->mode = mode;
		1721	req->sv1 = newSVsv (fh_or_path);
		1722
		1723	if (SvPOK (fh_or_path))
		1724	{
		1725	req->type = REQ_CHMOD;
		1726	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1727	}
		1728	else
		1729	{
		1730	req->type = REQ_FCHMOD;
		1731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1732	}
		1733
		1734	REQ_SEND;
		1735	}
		1736
		1737	void
		1738	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1739	PPCODE:
		1740	{
		1741	dREQ;
		1742
		1743	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1744	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1745	req->sv1 = newSVsv (fh_or_path);
		1746
		1747	if (SvPOK (fh_or_path))
		1748	{
		1749	req->type = REQ_CHOWN;
		1750	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1751	}
		1752	else
		1753	{
		1754	req->type = REQ_FCHOWN;
		1755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1756	}
		1757
		1758	REQ_SEND;
		1759	}
		1760
		1761	void
628	aio_unlink(pathname,callback=&PL_sv_undef)	1762	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
629	SV * pathname	1763	ALIAS:
630	SV * callback	1764	aio_unlink = REQ_UNLINK
		1765	aio_rmdir = REQ_RMDIR
		1766	aio_readdir = REQ_READDIR
		1767	PPCODE:
		1768	{
		1769	dREQ;
		1770
		1771	req->type = ix;
		1772	req->sv1 = newSVsv (pathname);
		1773	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1774
		1775	REQ_SEND;
		1776	}
		1777
		1778	void
		1779	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1780	PPCODE:
		1781	{
		1782	dREQ;
		1783
		1784	req->type = REQ_MKDIR;
		1785	req->sv1 = newSVsv (pathname);
		1786	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1787	req->mode = mode;
		1788
		1789	REQ_SEND;
		1790	}
		1791
		1792	void
		1793	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1794	ALIAS:
		1795	aio_link = REQ_LINK
		1796	aio_symlink = REQ_SYMLINK
		1797	aio_rename = REQ_RENAME
		1798	PPCODE:
		1799	{
		1800	dREQ;
		1801
		1802	req->type = ix;
		1803	req->sv2 = newSVsv (oldpath);
		1804	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1805	req->sv1 = newSVsv (newpath);
		1806	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1807
		1808	REQ_SEND;
		1809	}
		1810
		1811	void
		1812	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1813	PPCODE:
		1814	{
		1815	dREQ;
		1816
		1817	req->type = REQ_MKNOD;
		1818	req->sv1 = newSVsv (pathname);
		1819	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1820	req->mode = (mode_t)mode;
		1821	req->offs = dev;
		1822
		1823	REQ_SEND;
		1824	}
		1825
		1826	void
		1827	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1828	PPCODE:
		1829	{
		1830	dREQ;
		1831
		1832	req->type = REQ_BUSY;
		1833	req->nv1 = delay < 0. ? 0. : delay;
		1834
		1835	REQ_SEND;
		1836	}
		1837
		1838	void
		1839	aio_group (SV *callback=&PL_sv_undef)
		1840	PROTOTYPE: ;$
		1841	PPCODE:
		1842	{
		1843	dREQ;
		1844
		1845	req->type = REQ_GROUP;
		1846
		1847	req_send (req);
		1848	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1849	}
		1850
		1851	void
		1852	aio_nop (SV *callback=&PL_sv_undef)
		1853	PPCODE:
		1854	{
		1855	dREQ;
		1856
		1857	req->type = REQ_NOP;
		1858
		1859	REQ_SEND;
		1860	}
		1861
		1862	int
		1863	aioreq_pri (int pri = 0)
		1864	PROTOTYPE: ;$
631	CODE:	1865	CODE:
632	{	1866	RETVAL = next_pri - PRI_BIAS;
633	aio_req req;	1867	if (items > 0)
634		1868	{
635	Newz (0, req, 1, aio_cb);	1869	if (pri < PRI_MIN) pri = PRI_MIN;
636		1870	if (pri > PRI_MAX) pri = PRI_MAX;
637	if (!req)	1871	next_pri = pri + PRI_BIAS;
638	croak ("out of memory during aio_req allocation");	1872	}
639		1873	OUTPUT:
640	req->type = REQ_UNLINK;	1874	RETVAL
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647		1875
648	void	1876	void
		1877	aioreq_nice (int nice = 0)
		1878	CODE:
		1879	nice = next_pri - nice;
		1880	if (nice < PRI_MIN) nice = PRI_MIN;
		1881	if (nice > PRI_MAX) nice = PRI_MAX;
		1882	next_pri = nice + PRI_BIAS;
		1883
		1884	void
649	flush()	1885	flush ()
650	PROTOTYPE:	1886	PROTOTYPE:
651	CODE:	1887	CODE:
652	while (nreqs)	1888	while (nreqs)
653	{	1889	{
654	poll_wait ();	1890	poll_wait ();
655	poll_cb ();	1891	poll_cb ();
656	}	1892	}
657		1893
658	void	1894	int
659	poll()	1895	poll()
660	PROTOTYPE:	1896	PROTOTYPE:
661	CODE:	1897	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	1898	poll_wait ();
665	poll_cb ();	1899	RETVAL = poll_cb ();
666	}	1900	OUTPUT:
		1901	RETVAL
667		1902
668	int	1903	int
669	poll_fileno()	1904	poll_fileno()
670	PROTOTYPE:	1905	PROTOTYPE:
671	CODE:	1906	CODE:
…		…
683		1918
684	void	1919	void
685	poll_wait()	1920	poll_wait()
686	PROTOTYPE:	1921	PROTOTYPE:
687	CODE:	1922	CODE:
688	if (nreqs)
689	poll_wait ();	1923	poll_wait ();
		1924
		1925	void
		1926	setsig (int signum = SIGIO)
		1927	PROTOTYPE: ;$
		1928	CODE:
		1929	{
		1930	if (block_sig_level)
		1931	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1932
		1933	X_LOCK (reslock);
		1934	main_tid = pthread_self ();
		1935	main_sig = signum;
		1936	X_UNLOCK (reslock);
		1937
		1938	if (main_sig && npending)
		1939	pthread_kill (main_tid, main_sig);
		1940	}
		1941
		1942	void
		1943	aio_block (SV *cb)
		1944	PROTOTYPE: &
		1945	PPCODE:
		1946	{
		1947	int count;
		1948
		1949	block_sig ();
		1950	PUSHMARK (SP);
		1951	PUTBACK;
		1952	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1953	SPAGAIN;
		1954	unblock_sig ();
		1955
		1956	if (SvTRUE (ERRSV))
		1957	croak (0);
		1958
		1959	XSRETURN (count);
		1960	}
690		1961
691	int	1962	int
692	nreqs()	1963	nreqs()
693	PROTOTYPE:	1964	PROTOTYPE:
694	CODE:	1965	CODE:
695	RETVAL = nreqs;	1966	RETVAL = nreqs;
696	OUTPUT:	1967	OUTPUT:
697	RETVAL	1968	RETVAL
698		1969
		1970	int
		1971	nready()
		1972	PROTOTYPE:
		1973	CODE:
		1974	RETVAL = get_nready ();
		1975	OUTPUT:
		1976	RETVAL
		1977
		1978	int
		1979	npending()
		1980	PROTOTYPE:
		1981	CODE:
		1982	RETVAL = get_npending ();
		1983	OUTPUT:
		1984	RETVAL
		1985
		1986	int
		1987	nthreads()
		1988	PROTOTYPE:
		1989	CODE:
		1990	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1991	RETVAL = started;
		1992	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1993	OUTPUT:
		1994	RETVAL
		1995
		1996	PROTOTYPES: DISABLE
		1997
		1998	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1999
		2000	void
		2001	cancel (aio_req_ornot req)
		2002	CODE:
		2003	req_cancel (req);
		2004
		2005	void
		2006	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		2007	CODE:
		2008	SvREFCNT_dec (req->callback);
		2009	req->callback = newSVsv (callback);
		2010
		2011	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2012
		2013	void
		2014	add (aio_req grp, ...)
		2015	PPCODE:
		2016	{
		2017	int i;
		2018	aio_req req;
		2019
		2020	if (main_sig && !block_sig_level)
		2021	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		2022
		2023	if (grp->int1 == 2)
		2024	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2025
		2026	for (i = 1; i < items; ++i )
		2027	{
		2028	if (GIMME_V != G_VOID)
		2029	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2030
		2031	req = SvAIO_REQ (ST (i));
		2032
		2033	if (req)
		2034	{
		2035	++grp->size;
		2036	req->grp = grp;
		2037
		2038	req->grp_prev = 0;
		2039	req->grp_next = grp->grp_first;
		2040
		2041	if (grp->grp_first)
		2042	grp->grp_first->grp_prev = req;
		2043
		2044	grp->grp_first = req;
		2045	}
		2046	}
		2047	}
		2048
		2049	void
		2050	cancel_subs (aio_req_ornot req)
		2051	CODE:
		2052	req_cancel_subs (req);
		2053
		2054	void
		2055	result (aio_req grp, ...)
		2056	CODE:
		2057	{
		2058	int i;
		2059	AV *av;
		2060
		2061	grp->errorno = errno;
		2062
		2063	av = newAV ();
		2064
		2065	for (i = 1; i < items; ++i )
		2066	av_push (av, newSVsv (ST (i)));
		2067
		2068	SvREFCNT_dec (grp->sv1);
		2069	grp->sv1 = (SV *)av;
		2070	}
		2071
		2072	void
		2073	errno (aio_req grp, int errorno = errno)
		2074	CODE:
		2075	grp->errorno = errorno;
		2076
		2077	void
		2078	limit (aio_req grp, int limit)
		2079	CODE:
		2080	grp->int2 = limit;
		2081	aio_grp_feed (grp);
		2082
		2083	void
		2084	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2085	CODE:
		2086	{
		2087	SvREFCNT_dec (grp->sv2);
		2088	grp->sv2 = newSVsv (callback);
		2089
		2090	if (grp->int2 <= 0)
		2091	grp->int2 = 2;
		2092
		2093	aio_grp_feed (grp);
		2094	}
		2095

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