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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.15 by root, Sat Jul 23 18:19:56 2005 UTC vs.
Revision 1.105 by root, Sun Jul 8 11:12:15 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
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
5	#include <sys/types.h>	12	#include <sys/types.h>
6	#include <sys/stat.h>	13	#include <sys/stat.h>
7
8	#include <unistd.h>	14	#include <limits.h>
9	#include <fcntl.h>	15	#include <fcntl.h>
10	#include <signal.h>
11	#include <sched.h>	16	#include <sched.h>
12	#if __linux	17
		18	#ifdef _WIN32
		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>
13	#include <sys/syscall.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
14	#endif	67	#endif
15		68
16	#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
17		83
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	84	/* number of seconds after which idle threads exit */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	85	#define IDLE_TIMEOUT 10
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		86
22	#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 */
23	# 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
24	#else	98	#else
25	# define STACKSIZE 4096	99	# define SvVAL64 SvNV
26	#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 */
27		111
28	enum {	112	enum {
29	REQ_QUIT,	113	REQ_QUIT,
30	REQ_OPEN, REQ_CLOSE,	114	REQ_OPEN, REQ_CLOSE,
31	REQ_READ, REQ_WRITE, REQ_READAHEAD,	115	REQ_READ, REQ_WRITE,
		116	REQ_READAHEAD, REQ_SENDFILE,
32	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,
33	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,
34	};	128	};
35		129
		130	#define AIO_REQ_KLASS "IO::AIO::REQ"
		131	#define AIO_GRP_KLASS "IO::AIO::GRP"
		132
36	typedef struct aio_cb {	133	typedef struct aio_cb
		134	{
37	struct aio_cb *volatile next;	135	struct aio_cb *volatile next;
38		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;
39	int type;	146	int type;
40		147	int int1, int2, int3;
41	int fd;	148	int errorno;
42	off_t offset;
43	size_t length;
44	ssize_t result;
45	mode_t mode; /* open */	149	mode_t mode; /* open */
46	int errorno;
47	SV *data, *callback, *fh;
48	void *dataptr;
49	STRLEN dataoffset;
50		150
51	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;
52	} aio_cb;	156	} aio_cb;
53		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
54	typedef aio_cb *aio_req;	164	typedef aio_cb *aio_req;
		165	typedef aio_cb *aio_req_ornot;
55		166
56	static int started;	167	enum {
57	static volatile int nreqs;	168	PRI_MIN = -4,
58	static int max_outstanding = 1<<30;	169	PRI_MAX = 4,
59	static int respipe [2];
60		170
61	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	171	DEFAULT_PRI = 0,
62	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	172	PRI_BIAS = -PRI_MIN,
63	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	173	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		174	};
64		175
65	static volatile aio_req reqs, reqe; /* queue start, queue end */	176	#define AIO_TICKS ((1000000 + 1023) >> 10)
66	static volatile aio_req ress, rese; /* queue start, queue end */
67		177
68	static void	178	static unsigned int max_poll_time = 0;
69	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)
70	{	183	{
71	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)
72	{	246	{
73	fd_set rfd;	247	closedir (wrk->dirp);
74	FD_ZERO(&rfd);	248	wrk->dirp = 0;
75	FD_SET(respipe [0], &rfd);
76
77	select (respipe [0] + 1, &rfd, 0, 0, 0);
78	}	249	}
79	}
80		250
81	static int	251	if (wrk->dbuf)
82	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 [2], respipe_osf [2];
		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)
83	{	461	{
84	dSP;	462	dSP;
85	int count = 0;
86	aio_req req, prv;
87		463
88	pthread_mutex_lock (&reslock);	464	if (req->flags & FLAG_SV2_RO_OFF)
		465	SvREADONLY_off (req->sv2);
89		466
90	{	467	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
91	/* read any signals sent by the worker threads */
92	char buf [32];
93	while (read (respipe [0], buf, 32) > 0)
94	;
95	}
96
97	req = ress;
98	ress = rese = 0;
99
100	pthread_mutex_unlock (&reslock);
101
102	while (req)
103	{	468	{
104	nreqs--;	469	ENTER;
		470	SAVETMPS;
		471	PUSHMARK (SP);
		472	EXTEND (SP, 1);
105		473
106	if (req->type == REQ_QUIT)	474	switch (req->type)
107	started--;
108	else
109	{	475	{
110	int errorno = errno;	476	case REQ_READDIR:
111	errno = req->errorno;
112
113	if (req->type == REQ_READ)
114	SvCUR_set (req->data, req->dataoffset
115	+ req->result > 0 ? req->result : 0);
116
117	if (req->data)
118	SvREFCNT_dec (req->data);
119
120	if (req->fh)
121	SvREFCNT_dec (req->fh);
122
123	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
124	{	477	{
125	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	478	SV *rv = &PL_sv_undef;
126	PL_laststatval = req->result;
127	PL_statcache = *(req->statdata);
128		479
129	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);
130	}	500	}
		501	break;
131		502
132	ENTER;	503	case REQ_OPEN:
133	PUSHMARK (SP);
134	XPUSHs (sv_2mortal (newSViv (req->result)));
135
136	if (req->type == REQ_OPEN)
137	{	504	{
138	/* convert fd to fh */	505	/* convert fd to fh */
139	SV *fh;	506	SV *fh;
140		507
		508	PUSHs (sv_2mortal (newSViv (req->result)));
141	PUTBACK;	509	PUTBACK;
142	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	510	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
143	SPAGAIN;	511	SPAGAIN;
144		512
145	fh = SvREFCNT_inc (POPs);	513	fh = POPs;
146
147	PUSHMARK (SP);	514	PUSHMARK (SP);
148	XPUSHs (sv_2mortal (fh));	515	XPUSHs (fh);
149	}	516	}
		517	break;
150		518
151	if (SvOK (req->callback))	519	case REQ_GROUP:
		520	req->int1 = 2; /* mark group as finished */
		521
		522	if (req->sv1)
152	{	523	{
153	PUTBACK;	524	int i;
154	call_sv (req->callback, G_VOID | G_EVAL);	525	AV *av = (AV *)req->sv1;
155	SPAGAIN;	526
		527	EXTEND (SP, AvFILL (av) + 1);
		528	for (i = 0; i <= AvFILL (av); ++i)
		529	PUSHs (*av_fetch (av, i, 0));
156	}	530	}
		531	break;
157		532
158	LEAVE;	533	case REQ_NOP:
		534	case REQ_BUSY:
		535	break;
		536
		537	case REQ_READLINK:
		538	if (req->result > 0)
159		539	{
160	if (req->callback)	540	SvCUR_set (req->sv2, req->result);
161	SvREFCNT_dec (req->callback);	541	*SvEND (req->sv2) = 0;
		542	PUSHs (req->sv2);
		543	}
		544	break;
162		545
163	errno = errorno;	546	case REQ_STAT:
164	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;
165	}	564	}
166		565
167	prv = req;	566	errno = req->errorno;
168	req = req->next;
169	Safefree (prv);
170		567
171	/* TODO: croak on errors? */	568	PUTBACK;
		569	call_sv (req->callback, G_VOID | G_EVAL);
		570	SPAGAIN;
		571
		572	FREETMPS;
		573	LEAVE;
172	}	574	}
173		575
174	return count;	576	if (req->grp)
175	}	577	{
		578	aio_req grp = req->grp;
176		579
177	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
178		637
179	static void	638	static void
		639	create_pipe (int fd[2])
		640	{
		641	#ifdef _WIN32
		642	int arg = 1;
		643	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, fd)
		644	|| ioctlsocket (TO_SOCKET (fd [0]), FIONBIO, &arg)
		645	|| ioctlsocket (TO_SOCKET (fd [1]), FIONBIO, &arg))
		646	#else
		647	if (pipe (fd)
		648	|| fcntl (fd [0], F_SETFL, O_NONBLOCK)
		649	|| fcntl (fd [1], F_SETFL, O_NONBLOCK))
		650	#endif
		651	croak ("unable to initialize result pipe");
		652
		653	respipe_osf [0] = TO_SOCKET (respipe [0]);
		654	respipe_osf [1] = TO_SOCKET (respipe [1]);
		655	}
		656
		657	X_THREAD_PROC (aio_proc);
		658
180	start_thread (void)	659	static void start_thread (void)
181	{	660	{
182	sigset_t fullsigset, oldsigset;	661	worker *wrk = calloc (1, sizeof (worker));
183	pthread_t tid;
184	pthread_attr_t attr;
185		662
186	pthread_attr_init (&attr);	663	if (!wrk)
187	pthread_attr_setstacksize (&attr, STACKSIZE);	664	croak ("unable to allocate worker thread data");
188	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189		665
190	sigfillset (&fullsigset);	666	X_LOCK (wrklock);
191	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192		667
193	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	668	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
194	started++;
195
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}
198
199	static void
200	send_req (aio_req req)
201	{
202	nreqs++;
203
204	pthread_mutex_lock (&reqlock);
205
206	req->next = 0;
207
208	if (reqe)
209	{	669	{
210	reqe->next = req;	670	wrk->prev = &wrk_first;
211	reqe = req;	671	wrk->next = wrk_first.next;
		672	wrk_first.next->prev = wrk;
		673	wrk_first.next = wrk;
		674	++started;
212	}	675	}
213	else	676	else
214	reqe = reqs = req;	677	free (wrk);
215		678
216	pthread_cond_signal (&reqwait);	679	X_UNLOCK (wrklock);
217	pthread_mutex_unlock (&reqlock);	680	}
218		681
219	while (nreqs > max_outstanding)	682	static void maybe_start_thread ()
		683	{
		684	if (get_nthreads () >= wanted)
		685	return;
		686
		687	/* todo: maybe use idle here, but might be less exact */
		688	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		689	return;
		690
		691	start_thread ();
		692	}
		693
		694	static void req_send (aio_req req)
		695	{
		696	block_sig ();
		697
		698	++nreqs;
		699
		700	X_LOCK (reqlock);
		701	++nready;
		702	reqq_push (&req_queue, req);
		703	X_COND_SIGNAL (reqwait);
		704	X_UNLOCK (reqlock);
		705
		706	unblock_sig ();
		707
		708	maybe_start_thread ();
		709	}
		710
		711	static void end_thread (void)
		712	{
		713	aio_req req;
		714
		715	Newz (0, req, 1, aio_cb);
		716
		717	req->type = REQ_QUIT;
		718	req->pri = PRI_MAX + PRI_BIAS;
		719
		720	X_LOCK (reqlock);
		721	reqq_push (&req_queue, req);
		722	X_COND_SIGNAL (reqwait);
		723	X_UNLOCK (reqlock);
		724
		725	X_LOCK (wrklock);
		726	--started;
		727	X_UNLOCK (wrklock);
		728	}
		729
		730	static void set_max_idle (int nthreads)
		731	{
		732	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		733	max_idle = nthreads <= 0 ? 1 : nthreads;
		734	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		735	}
		736
		737	static void min_parallel (int nthreads)
		738	{
		739	if (wanted < nthreads)
		740	wanted = nthreads;
		741	}
		742
		743	static void max_parallel (int nthreads)
		744	{
		745	if (wanted > nthreads)
		746	wanted = nthreads;
		747
		748	while (started > wanted)
		749	end_thread ();
		750	}
		751
		752	static void poll_wait ()
		753	{
		754	fd_set rfd;
		755
		756	while (nreqs)
220	{	757	{
221	poll_wait ();	758	int size;
222	poll_cb ();	759	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		760	size = res_queue.size;
		761	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		762
		763	if (size)
		764	return;
		765
		766	maybe_start_thread ();
		767
		768	FD_ZERO (&rfd);
		769	FD_SET (respipe [0], &rfd);
		770
		771	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
223	}	772	}
224	}	773	}
225		774
226	static void	775	static int poll_cb ()
227	end_thread (void)
228	{	776	{
		777	dSP;
		778	int count = 0;
		779	int maxreqs = max_poll_reqs;
		780	int do_croak = 0;
		781	struct timeval tv_start, tv_now;
229	aio_req req;	782	aio_req req;
230	New (0, req, 1, aio_cb);
231	req->type = REQ_QUIT;
232		783
233	send_req (req);	784	if (max_poll_time)
234	}	785	gettimeofday (&tv_start, 0);
235		786
236	static void *	787	block_sig ();
237	aio_proc (void *thr_arg)
238	{
239	aio_req req;
240	int type;
241		788
242	do	789	for (;;)
243	{	790	{
244	pthread_mutex_lock (&reqlock);
245
246	for (;;)	791	for (;;)
247	{	792	{
248	req = reqs;	793	maybe_start_thread ();
249		794
		795	X_LOCK (reslock);
		796	req = reqq_shift (&res_queue);
		797
250	if (reqs)	798	if (req)
251	{	799	{
252	reqs = reqs->next;	800	--npending;
253	if (!reqs) reqe = 0;	801
		802	if (!res_queue.size)
		803	{
		804	/* read any signals sent by the worker threads */
		805	char buf [4];
		806	while (respipe_read (respipe [0], buf, 4) == 4)
		807	;
		808	}
254	}	809	}
		810
		811	X_UNLOCK (reslock);
		812
		813	if (!req)
		814	break;
		815
		816	--nreqs;
		817
		818	if (req->type == REQ_GROUP && req->size)
		819	{
		820	req->int1 = 1; /* mark request as delayed */
		821	continue;
		822	}
		823	else
		824	{
		825	if (!req_invoke (req))
		826	{
		827	req_destroy (req);
		828	unblock_sig ();
		829	croak (0);
		830	}
		831
		832	count++;
		833	}
		834
		835	req_destroy (req);
		836
		837	if (maxreqs && !--maxreqs)
		838	break;
		839
		840	if (max_poll_time)
		841	{
		842	gettimeofday (&tv_now, 0);
		843
		844	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		845	break;
		846	}
		847	}
		848
		849	if (nreqs <= max_outstanding)
		850	break;
		851
		852	poll_wait ();
		853
		854	++maxreqs;
		855	}
		856
		857	unblock_sig ();
		858	return count;
		859	}
		860
		861	/*****************************************************************************/
		862	/* work around various missing functions */
		863
		864	#if !HAVE_PREADWRITE
		865	# define pread aio_pread
		866	# define pwrite aio_pwrite
		867
		868	/*
		869	* make our pread/pwrite safe against themselves, but not against
		870	* normal read/write by using a mutex. slows down execution a lot,
		871	* but that's your problem, not mine.
		872	*/
		873	static mutex_t preadwritelock = X_MUTEX_INIT;
		874
		875	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		876	{
		877	ssize_t res;
		878	off_t ooffset;
		879
		880	X_LOCK (preadwritelock);
		881	ooffset = lseek (fd, 0, SEEK_CUR);
		882	lseek (fd, offset, SEEK_SET);
		883	res = read (fd, buf, count);
		884	lseek (fd, ooffset, SEEK_SET);
		885	X_UNLOCK (preadwritelock);
		886
		887	return res;
		888	}
		889
		890	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		891	{
		892	ssize_t res;
		893	off_t ooffset;
		894
		895	X_LOCK (preadwritelock);
		896	ooffset = lseek (fd, 0, SEEK_CUR);
		897	lseek (fd, offset, SEEK_SET);
		898	res = write (fd, buf, count);
		899	lseek (fd, offset, SEEK_SET);
		900	X_UNLOCK (preadwritelock);
		901
		902	return res;
		903	}
		904	#endif
		905
		906	#ifndef HAVE_FUTIMES
		907
		908	# define utimes(path,times) aio_utimes (path, times)
		909	# define futimes(fd,times) aio_futimes (fd, times)
		910
		911	int aio_utimes (const char *filename, const struct timeval times[2])
		912	{
		913	if (times)
		914	{
		915	struct utimbuf buf;
		916
		917	buf.actime = times[0].tv_sec;
		918	buf.modtime = times[1].tv_sec;
		919
		920	return utime (filename, &buf);
		921	}
		922	else
		923	return utime (filename, 0);
		924	}
		925
		926	int aio_futimes (int fd, const struct timeval tv[2])
		927	{
		928	errno = ENOSYS;
		929	return -1;
		930	}
		931
		932	#endif
		933
		934	#if !HAVE_FDATASYNC
		935	# define fdatasync fsync
		936	#endif
		937
		938	#if !HAVE_READAHEAD
		939	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
		940
		941	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
		942	{
		943	size_t todo = count;
		944	dBUF;
		945
		946	while (todo > 0)
		947	{
		948	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
		949
		950	pread (fd, aio_buf, len, offset);
		951	offset += len;
		952	todo -= len;
		953	}
		954
		955	errno = 0;
		956	return count;
		957	}
		958
		959	#endif
		960
		961	#if !HAVE_READDIR_R
		962	# define readdir_r aio_readdir_r
		963
		964	static mutex_t readdirlock = X_MUTEX_INIT;
		965
		966	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
		967	{
		968	X_DIRENT *e;
		969	int errorno;
		970
		971	X_LOCK (readdirlock);
		972
		973	e = readdir (dirp);
		974	errorno = errno;
		975
		976	if (e)
		977	{
		978	*res = ent;
		979	strcpy (ent->d_name, e->d_name);
		980	}
		981	else
		982	*res = 0;
		983
		984	X_UNLOCK (readdirlock);
		985
		986	errno = errorno;
		987	return e ? 0 : -1;
		988	}
		989	#endif
		990
		991	/* sendfile always needs emulation */
		992	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		993	{
		994	ssize_t res;
		995
		996	if (!count)
		997	return 0;
		998
		999	#if HAVE_SENDFILE
		1000	# if __linux
		1001	res = sendfile (ofd, ifd, &offset, count);
		1002
		1003	# elif __freebsd
		1004	/*
		1005	* Of course, the freebsd sendfile is a dire hack with no thoughts
		1006	* wasted on making it similar to other I/O functions.
		1007	*/
		1008	{
		1009	off_t sbytes;
		1010	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		1011
		1012	if (res < 0 && sbytes)
		1013	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		1014	res = sbytes;
		1015	}
		1016
		1017	# elif __hpux
		1018	res = sendfile (ofd, ifd, offset, count, 0, 0);
		1019
		1020	# elif __solaris
		1021	{
		1022	struct sendfilevec vec;
		1023	size_t sbytes;
		1024
		1025	vec.sfv_fd = ifd;
		1026	vec.sfv_flag = 0;
		1027	vec.sfv_off = offset;
		1028	vec.sfv_len = count;
		1029
		1030	res = sendfilev (ofd, &vec, 1, &sbytes);
		1031
		1032	if (res < 0 && sbytes)
		1033	res = sbytes;
		1034	}
		1035
		1036	# endif
		1037	#else
		1038	res = -1;
		1039	errno = ENOSYS;
		1040	#endif
		1041
		1042	if (res < 0
		1043	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1044	#if __solaris
		1045	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		1046	#endif
		1047	)
		1048	)
		1049	{
		1050	/* emulate sendfile. this is a major pain in the ass */
		1051	dBUF;
		1052
		1053	res = 0;
		1054
		1055	while (count)
		1056	{
		1057	ssize_t cnt;
		1058
		1059	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		1060
		1061	if (cnt <= 0)
		1062	{
		1063	if (cnt && !res) res = -1;
		1064	break;
		1065	}
		1066
		1067	cnt = write (ofd, aio_buf, cnt);
		1068
		1069	if (cnt <= 0)
		1070	{
		1071	if (cnt && !res) res = -1;
		1072	break;
		1073	}
		1074
		1075	offset += cnt;
		1076	res += cnt;
		1077	count -= cnt;
		1078	}
		1079	}
		1080
		1081	return res;
		1082	}
		1083
		1084	/* read a full directory */
		1085	static void scandir_ (aio_req req, worker *self)
		1086	{
		1087	DIR *dirp;
		1088	union
		1089	{
		1090	X_DIRENT d;
		1091	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
		1092	} *u;
		1093	X_DIRENT *entp;
		1094	char *name, *names;
		1095	int memlen = 4096;
		1096	int memofs = 0;
		1097	int res = 0;
		1098
		1099	X_LOCK (wrklock);
		1100	self->dirp = dirp = opendir (req->ptr1);
		1101	self->dbuf = u = malloc (sizeof (*u));
		1102	req->flags |= FLAG_PTR2_FREE;
		1103	req->ptr2 = names = malloc (memlen);
		1104	X_UNLOCK (wrklock);
		1105
		1106	if (dirp && u && names)
		1107	for (;;)
		1108	{
		1109	errno = 0;
		1110	readdir_r (dirp, &u->d, &entp);
		1111
		1112	if (!entp)
		1113	break;
		1114
		1115	name = entp->d_name;
		1116
		1117	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1118	{
		1119	int len = strlen (name) + 1;
		1120
		1121	res++;
		1122
		1123	while (memofs + len > memlen)
		1124	{
		1125	memlen *= 2;
		1126	X_LOCK (wrklock);
		1127	req->ptr2 = names = realloc (names, memlen);
		1128	X_UNLOCK (wrklock);
		1129
		1130	if (!names)
		1131	break;
		1132	}
		1133
		1134	memcpy (names + memofs, name, len);
		1135	memofs += len;
		1136	}
		1137	}
		1138
		1139	if (errno)
		1140	res = -1;
		1141
		1142	req->result = res;
		1143	}
		1144
		1145	/*****************************************************************************/
		1146
		1147	X_THREAD_PROC (aio_proc)
		1148	{
		1149	{//D
		1150	aio_req req;
		1151	struct timespec ts;
		1152	worker *self = (worker *)thr_arg;
		1153
		1154	/* try to distribute timeouts somewhat randomly */
		1155	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
		1156
		1157	for (;;)
		1158	{
		1159	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1160
		1161	X_LOCK (reqlock);
		1162
		1163	for (;;)
		1164	{
		1165	self->req = req = reqq_shift (&req_queue);
255		1166
256	if (req)	1167	if (req)
257	break;	1168	break;
258		1169
259	pthread_cond_wait (&reqwait, &reqlock);	1170	++idle;
		1171
		1172	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
		1173	== ETIMEDOUT)
		1174	{
		1175	if (idle > max_idle)
		1176	{
		1177	--idle;
		1178	X_UNLOCK (reqlock);
		1179	X_LOCK (wrklock);
		1180	--started;
		1181	X_UNLOCK (wrklock);
		1182	goto quit;
		1183	}
		1184
		1185	/* we are allowed to idle, so do so without any timeout */
		1186	X_COND_WAIT (reqwait, reqlock);
		1187	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1188	}
		1189
		1190	--idle;
260	}	1191	}
261		1192
262	pthread_mutex_unlock (&reqlock);	1193	--nready;
		1194
		1195	X_UNLOCK (reqlock);
263		1196
264	errno = 0; /* strictly unnecessary */	1197	errno = 0; /* strictly unnecessary */
265		1198
266	type = req->type;	1199	if (!(req->flags & FLAG_CANCELLED))
267
268	switch (type)	1200	switch (req->type)
		1201	{
		1202	case REQ_READ: req->result = req->offs >= 0
		1203	? pread (req->int1, req->ptr1, req->size, req->offs)
		1204	: read (req->int1, req->ptr1, req->size); break;
		1205	case REQ_WRITE: req->result = req->offs >= 0
		1206	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1207	: write (req->int1, req->ptr1, req->size); break;
		1208
		1209	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1210	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1211
		1212	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1213	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1214	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1215
		1216	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1217	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1218	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1219	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1220	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1221	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1222
		1223	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1224	case REQ_CLOSE: req->result = close (req->int1); break;
		1225	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1226	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1227	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1228	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1229	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1230	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1231	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1232	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1233
		1234	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1235	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1236	case REQ_READDIR: scandir_ (req, self); break;
		1237
		1238	case REQ_BUSY:
		1239	#ifdef _WIN32
		1240	Sleep (req->nv1 * 1000.);
		1241	#else
		1242	{
		1243	struct timeval tv;
		1244
		1245	tv.tv_sec = req->nv1;
		1246	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1247
		1248	req->result = select (0, 0, 0, 0, &tv);
		1249	}
		1250	#endif
		1251	break;
		1252
		1253	case REQ_UTIME:
		1254	case REQ_FUTIME:
		1255	{
		1256	struct timeval tv[2];
		1257	struct timeval *times;
		1258
		1259	if (req->nv1 != -1. || req->nv2 != -1.)
		1260	{
		1261	tv[0].tv_sec = req->nv1;
		1262	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1263	tv[1].tv_sec = req->nv2;
		1264	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1265
		1266	times = tv;
		1267	}
		1268	else
		1269	times = 0;
		1270
		1271
		1272	req->result = req->type == REQ_FUTIME
		1273	? futimes (req->int1, times)
		1274	: utimes (req->ptr1, times);
		1275	}
		1276
		1277	case REQ_GROUP:
		1278	case REQ_NOP:
		1279	break;
		1280
		1281	case REQ_QUIT:
		1282	goto quit;
		1283
		1284	default:
		1285	req->result = -1;
		1286	break;
		1287	}
		1288
		1289	req->errorno = errno;
		1290
		1291	X_LOCK (reslock);
		1292
		1293	++npending;
		1294
		1295	if (!reqq_push (&res_queue, req))
269	{	1296	{
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1297	/* write a dummy byte to the pipe so fh becomes ready */
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1298	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
272	#if SYS_readahead	1299
273	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1300	/* optionally signal the main thread asynchronously */
		1301	if (main_sig)
		1302	pthread_kill (main_tid, main_sig);
		1303	}
		1304
		1305	self->req = 0;
		1306	worker_clear (self);
		1307
		1308	X_UNLOCK (reslock);
		1309	}
		1310
		1311	quit:
		1312	X_LOCK (wrklock);
		1313	worker_free (self);
		1314	X_UNLOCK (wrklock);
		1315
		1316	return 0;
		1317	}//D
		1318	}
		1319
		1320	/*****************************************************************************/
		1321
		1322	static void atfork_prepare (void)
		1323	{
		1324	X_LOCK (wrklock);
		1325	X_LOCK (reqlock);
		1326	X_LOCK (reslock);
		1327	#if !HAVE_PREADWRITE
		1328	X_LOCK (preadwritelock);
		1329	#endif
		1330	#if !HAVE_READDIR_R
		1331	X_LOCK (readdirlock);
		1332	#endif
		1333	}
		1334
		1335	static void atfork_parent (void)
		1336	{
		1337	#if !HAVE_READDIR_R
		1338	X_UNLOCK (readdirlock);
		1339	#endif
		1340	#if !HAVE_PREADWRITE
		1341	X_UNLOCK (preadwritelock);
		1342	#endif
		1343	X_UNLOCK (reslock);
		1344	X_UNLOCK (reqlock);
		1345	X_UNLOCK (wrklock);
		1346	}
		1347
		1348	static void atfork_child (void)
		1349	{
		1350	aio_req prv;
		1351
		1352	while (prv = reqq_shift (&req_queue))
		1353	req_destroy (prv);
		1354
		1355	while (prv = reqq_shift (&res_queue))
		1356	req_destroy (prv);
		1357
		1358	while (wrk_first.next != &wrk_first)
		1359	{
		1360	worker *wrk = wrk_first.next;
		1361
		1362	if (wrk->req)
		1363	req_destroy (wrk->req);
		1364
		1365	worker_clear (wrk);
		1366	worker_free (wrk);
		1367	}
		1368
		1369	started = 0;
		1370	idle = 0;
		1371	nreqs = 0;
		1372	nready = 0;
		1373	npending = 0;
		1374
		1375	respipe_close (respipe [0]);
		1376	respipe_close (respipe [1]);
		1377
		1378	create_pipe (respipe);
		1379
		1380	atfork_parent ();
		1381	}
		1382
		1383	#define dREQ \
		1384	aio_req req; \
		1385	int req_pri = next_pri; \
		1386	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1387	\
		1388	if (SvOK (callback) && !SvROK (callback)) \
		1389	croak ("callback must be undef or of reference type"); \
		1390	\
		1391	Newz (0, req, 1, aio_cb); \
		1392	if (!req) \
		1393	croak ("out of memory during aio_req allocation"); \
		1394	\
		1395	req->callback = newSVsv (callback); \
		1396	req->pri = req_pri
		1397
		1398	#define REQ_SEND \
		1399	req_send (req); \
		1400	\
		1401	if (GIMME_V != G_VOID) \
		1402	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1403
		1404	MODULE = IO::AIO PACKAGE = IO::AIO
		1405
		1406	PROTOTYPES: ENABLE
		1407
		1408	BOOT:
		1409	{
		1410	HV *stash = gv_stashpv ("IO::AIO", 1);
		1411
		1412	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1413	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1414	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1415	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1416	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1417	#ifdef _WIN32
		1418	X_MUTEX_CHECK (wrklock);
		1419	X_MUTEX_CHECK (reslock);
		1420	X_MUTEX_CHECK (reqlock);
		1421	X_MUTEX_CHECK (reqwait);
		1422	X_MUTEX_CHECK (preadwritelock);
		1423	X_MUTEX_CHECK (readdirlock);
		1424
		1425	X_COND_CHECK (reqwait);
274	#else	1426	#else
275	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;	1427	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1428	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
276	#endif	1429	#endif
277		1430
278	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
279	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
280	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
281
282	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
283	case REQ_CLOSE: req->result = close (req->fd); break;
284	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
285
286	case REQ_FSYNC: req->result = fsync (req->fd); break;
287	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
288
289	case REQ_QUIT:
290	break;
291
292	default:
293	req->result = ENOSYS;
294	break;
295	}
296
297	req->errorno = errno;
298
299	pthread_mutex_lock (&reslock);
300
301	req->next = 0;
302
303	if (rese)
304	{
305	rese->next = req;
306	rese = req;
307	}
308	else
309	{
310	rese = ress = req;
311
312	/* write a dummy byte to the pipe so fh becomes ready */
313	write (respipe [1], &respipe, 1);
314	}
315
316	pthread_mutex_unlock (&reslock);
317	}
318	while (type != REQ_QUIT);
319
320	return 0;
321	}
322
323	MODULE = IO::AIO PACKAGE = IO::AIO
324
325	PROTOTYPES: ENABLE
326
327	BOOT:
328	{
329	if (pipe (respipe))	1431	create_pipe (respipe);
330	croak ("unable to initialize result pipe");
331		1432
332	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1433	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
333	croak ("cannot set result pipe to nonblocking mode");
334
335	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
336	croak ("cannot set result pipe to nonblocking mode");
337	}	1434	}
338		1435
339	void	1436	void
340	min_parallel(nthreads)	1437	max_poll_reqs (int nreqs)
341	int nthreads
342	PROTOTYPE: $	1438	PROTOTYPE: $
343	CODE:	1439	CODE:
344	while (nthreads > started)	1440	max_poll_reqs = nreqs;
345	start_thread ();
346		1441
347	void	1442	void
348	max_parallel(nthreads)	1443	max_poll_time (double nseconds)
349	int nthreads
350	PROTOTYPE: $	1444	PROTOTYPE: $
351	CODE:	1445	CODE:
352	{	1446	max_poll_time = nseconds * AIO_TICKS;
353	int cur = started;
354	while (cur > nthreads)
355	{
356	end_thread ();
357	cur--;
358	}
359		1447
360	while (started > nthreads)	1448	void
361	{	1449	min_parallel (int nthreads)
362	poll_wait ();	1450	PROTOTYPE: $
363	poll_cb ();	1451
364	}	1452	void
365	}	1453	max_parallel (int nthreads)
		1454	PROTOTYPE: $
		1455
		1456	void
		1457	max_idle (int nthreads)
		1458	PROTOTYPE: $
		1459	CODE:
		1460	set_max_idle (nthreads);
366		1461
367	int	1462	int
368	max_outstanding(nreqs)	1463	max_outstanding (int maxreqs)
369	int nreqs	1464	PROTOTYPE: $
370	PROTOTYPE: $
371	CODE:	1465	CODE:
372	RETVAL = max_outstanding;	1466	RETVAL = max_outstanding;
373	max_outstanding = nreqs;	1467	max_outstanding = maxreqs;
		1468	OUTPUT:
		1469	RETVAL
374		1470
375	void	1471	void
376	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1472	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
377	SV * pathname
378	int flags
379	int mode
380	SV * callback
381	PROTOTYPE: $$$;$	1473	PROTOTYPE: $$$;$
382	CODE:	1474	PPCODE:
383	{	1475	{
384	aio_req req;	1476	dREQ;
385
386	Newz (0, req, 1, aio_cb);
387
388	if (!req)
389	croak ("out of memory during aio_req allocation");
390		1477
391	req->type = REQ_OPEN;	1478	req->type = REQ_OPEN;
392	req->data = newSVsv (pathname);	1479	req->sv1 = newSVsv (pathname);
393	req->dataptr = SvPV_nolen (req->data);	1480	req->ptr1 = SvPVbyte_nolen (req->sv1);
394	req->fd = flags;	1481	req->int1 = flags;
395	req->mode = mode;	1482	req->mode = mode;
396	req->callback = SvREFCNT_inc (callback);
397		1483
398	send_req (req);	1484	REQ_SEND;
399	}	1485	}
400		1486
401	void	1487	void
402	aio_close(fh,callback=&PL_sv_undef)	1488	aio_close (SV *fh, SV *callback=&PL_sv_undef)
403	SV * fh
404	SV * callback
405	PROTOTYPE: $;$	1489	PROTOTYPE: $;$
406	ALIAS:	1490	ALIAS:
407	aio_close = REQ_CLOSE	1491	aio_close = REQ_CLOSE
408	aio_fsync = REQ_FSYNC	1492	aio_fsync = REQ_FSYNC
409	aio_fdatasync = REQ_FDATASYNC	1493	aio_fdatasync = REQ_FDATASYNC
410	CODE:	1494	PPCODE:
411	{	1495	{
412	aio_req req;	1496	dREQ;
413
414	Newz (0, req, 1, aio_cb);
415
416	if (!req)
417	croak ("out of memory during aio_req allocation");
418		1497
419	req->type = ix;	1498	req->type = ix;
420	req->fh = newSVsv (fh);	1499	req->sv1 = newSVsv (fh);
421	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1500	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
422	req->callback = SvREFCNT_inc (callback);
423		1501
424	send_req (req);	1502	REQ_SEND (req);
425	}	1503	}
426		1504
427	void	1505	void
428	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1506	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
429	SV * fh
430	UV offset
431	IV length
432	SV * data
433	IV dataoffset
434	SV * callback
435	ALIAS:	1507	ALIAS:
436	aio_read = REQ_READ	1508	aio_read = REQ_READ
437	aio_write = REQ_WRITE	1509	aio_write = REQ_WRITE
438	PROTOTYPE: $$$$$;$	1510	PROTOTYPE: $$$$$;$
439	CODE:	1511	PPCODE:
440	{	1512	{
441	aio_req req;
442	STRLEN svlen;	1513	STRLEN svlen;
443	char *svptr = SvPV (data, svlen);	1514	char *svptr = SvPVbyte (data, svlen);
		1515	UV len = SvUV (length);
444		1516
445	SvUPGRADE (data, SVt_PV);	1517	SvUPGRADE (data, SVt_PV);
446	SvPOK_on (data);	1518	SvPOK_on (data);
447		1519
448	if (dataoffset < 0)	1520	if (dataoffset < 0)
449	dataoffset += svlen;	1521	dataoffset += svlen;
450		1522
451	if (dataoffset < 0 || dataoffset > svlen)	1523	if (dataoffset < 0 || dataoffset > svlen)
452	croak ("data offset outside of string");	1524	croak ("dataoffset outside of data scalar");
453		1525
454	if (ix == REQ_WRITE)	1526	if (ix == REQ_WRITE)
455	{	1527	{
456	/* write: check length and adjust. */	1528	/* write: check length and adjust. */
457	if (length < 0 || length + dataoffset > svlen)	1529	if (!SvOK (length) || len + dataoffset > svlen)
458	length = svlen - dataoffset;	1530	len = svlen - dataoffset;
459	}	1531	}
460	else	1532	else
461	{	1533	{
462	/* read: grow scalar as necessary */	1534	/* read: grow scalar as necessary */
463	svptr = SvGROW (data, length + dataoffset);	1535	svptr = SvGROW (data, len + dataoffset + 1);
464	}	1536	}
465		1537
466	if (length < 0)	1538	if (len < 0)
467	croak ("length must not be negative");	1539	croak ("length must not be negative");
468		1540
469	Newz (0, req, 1, aio_cb);	1541	{
		1542	dREQ;
470		1543
471	if (!req)
472	croak ("out of memory during aio_req allocation");
473
474	req->type = ix;	1544	req->type = ix;
475	req->fh = newSVsv (fh);	1545	req->sv1 = newSVsv (fh);
476	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1546	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
477	: IoOFP (sv_2io (fh)));	1547	: IoOFP (sv_2io (fh)));
478	req->offset = offset;	1548	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
479	req->length = length;	1549	req->size = len;
480	req->data = SvREFCNT_inc (data);	1550	req->sv2 = SvREFCNT_inc (data);
481	req->dataptr = (char *)svptr + dataoffset;	1551	req->ptr1 = (char *)svptr + dataoffset;
482	req->callback = SvREFCNT_inc (callback);	1552	req->stroffset = dataoffset;
483		1553
484	send_req (req);	1554	if (!SvREADONLY (data))
485	}	1555	{
		1556	SvREADONLY_on (data);
		1557	req->flags |= FLAG_SV2_RO_OFF;
		1558	}
486		1559
		1560	REQ_SEND;
		1561	}
		1562	}
		1563
487	void	1564	void
		1565	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1566	PROTOTYPE: $$;$
		1567	PPCODE:
		1568	{
		1569	SV *data;
		1570	dREQ;
		1571
		1572	data = newSV (NAME_MAX);
		1573	SvPOK_on (data);
		1574
		1575	req->type = REQ_READLINK;
		1576	req->sv1 = newSVsv (path);
		1577	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1578	req->sv2 = data;
		1579	req->ptr1 = SvPVbyte_nolen (data);
		1580
		1581	REQ_SEND;
		1582	}
		1583
		1584	void
		1585	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		1586	PROTOTYPE: $$$$;$
		1587	PPCODE:
		1588	{
		1589	dREQ;
		1590
		1591	req->type = REQ_SENDFILE;
		1592	req->sv1 = newSVsv (out_fh);
		1593	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1594	req->sv2 = newSVsv (in_fh);
		1595	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1596	req->offs = SvVAL64 (in_offset);
		1597	req->size = length;
		1598
		1599	REQ_SEND;
		1600	}
		1601
		1602	void
488	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1603	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
489	SV * fh
490	UV offset
491	IV length
492	SV * callback
493	PROTOTYPE: $$$;$	1604	PROTOTYPE: $$$;$
494	CODE:	1605	PPCODE:
495	{	1606	{
496	aio_req req;	1607	dREQ;
497
498	if (length < 0)
499	croak ("length must not be negative");
500
501	Newz (0, req, 1, aio_cb);
502
503	if (!req)
504	croak ("out of memory during aio_req allocation");
505		1608
506	req->type = REQ_READAHEAD;	1609	req->type = REQ_READAHEAD;
507	req->fh = newSVsv (fh);	1610	req->sv1 = newSVsv (fh);
508	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1611	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
509	req->offset = offset;	1612	req->offs = SvVAL64 (offset);
510	req->length = length;	1613	req->size = length;
511	req->callback = SvREFCNT_inc (callback);
512		1614
513	send_req (req);	1615	REQ_SEND;
514	}	1616	}
515		1617
516	void	1618	void
517	aio_stat(fh_or_path,callback=&PL_sv_undef)	1619	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
518	SV * fh_or_path
519	SV * callback
520	ALIAS:	1620	ALIAS:
521	aio_stat = REQ_STAT	1621	aio_stat = REQ_STAT
522	aio_lstat = REQ_LSTAT	1622	aio_lstat = REQ_LSTAT
523	CODE:	1623	PPCODE:
524	{	1624	{
525	aio_req req;	1625	dREQ;
526		1626
527	Newz (0, req, 1, aio_cb);	1627	req->ptr2 = malloc (sizeof (Stat_t));
528
529	if (!req)	1628	if (!req->ptr2)
530	croak ("out of memory during aio_req allocation");	1629	{
531		1630	req_destroy (req);
532	New (0, req->statdata, 1, Stat_t);
533
534	if (!req->statdata)
535	croak ("out of memory during aio_req->statdata allocation");	1631	croak ("out of memory during aio_stat statdata allocation");
		1632	}
		1633
		1634	req->flags |= FLAG_PTR2_FREE;
		1635	req->sv1 = newSVsv (fh_or_path);
536		1636
537	if (SvPOK (fh_or_path))	1637	if (SvPOK (fh_or_path))
538	{	1638	{
539	req->type = ix;	1639	req->type = ix;
540	req->data = newSVsv (fh_or_path);
541	req->dataptr = SvPV_nolen (req->data);	1640	req->ptr1 = SvPVbyte_nolen (req->sv1);
542	}	1641	}
543	else	1642	else
544	{	1643	{
545	req->type = REQ_FSTAT;	1644	req->type = REQ_FSTAT;
546	req->fh = newSVsv (fh_or_path);
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1645	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}	1646	}
549		1647
550	req->callback = SvREFCNT_inc (callback);	1648	REQ_SEND;
551
552	send_req (req);
553	}	1649	}
554		1650
555	void	1651	void
		1652	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1653	PPCODE:
		1654	{
		1655	dREQ;
		1656
		1657	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1658	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1659	req->sv1 = newSVsv (fh_or_path);
		1660
		1661	if (SvPOK (fh_or_path))
		1662	{
		1663	req->type = REQ_UTIME;
		1664	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1665	}
		1666	else
		1667	{
		1668	req->type = REQ_FUTIME;
		1669	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1670	}
		1671
		1672	REQ_SEND;
		1673	}
		1674
		1675	void
		1676	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1677	PPCODE:
		1678	{
		1679	dREQ;
		1680
		1681	req->sv1 = newSVsv (fh_or_path);
		1682	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1683
		1684	if (SvPOK (fh_or_path))
		1685	{
		1686	req->type = REQ_TRUNCATE;
		1687	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1688	}
		1689	else
		1690	{
		1691	req->type = REQ_FTRUNCATE;
		1692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1693	}
		1694
		1695	REQ_SEND;
		1696	}
		1697
		1698	void
		1699	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1700	PPCODE:
		1701	{
		1702	dREQ;
		1703
		1704	req->mode = mode;
		1705	req->sv1 = newSVsv (fh_or_path);
		1706
		1707	if (SvPOK (fh_or_path))
		1708	{
		1709	req->type = REQ_CHMOD;
		1710	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1711	}
		1712	else
		1713	{
		1714	req->type = REQ_FCHMOD;
		1715	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1716	}
		1717
		1718	REQ_SEND;
		1719	}
		1720
		1721	void
		1722	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1723	PPCODE:
		1724	{
		1725	dREQ;
		1726
		1727	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1728	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1729	req->sv1 = newSVsv (fh_or_path);
		1730
		1731	if (SvPOK (fh_or_path))
		1732	{
		1733	req->type = REQ_CHOWN;
		1734	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1735	}
		1736	else
		1737	{
		1738	req->type = REQ_FCHOWN;
		1739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1740	}
		1741
		1742	REQ_SEND;
		1743	}
		1744
		1745	void
556	aio_unlink(pathname,callback=&PL_sv_undef)	1746	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
557	SV * pathname	1747	ALIAS:
558	SV * callback	1748	aio_unlink = REQ_UNLINK
		1749	aio_rmdir = REQ_RMDIR
		1750	aio_readdir = REQ_READDIR
		1751	PPCODE:
		1752	{
		1753	dREQ;
		1754
		1755	req->type = ix;
		1756	req->sv1 = newSVsv (pathname);
		1757	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1758
		1759	REQ_SEND;
		1760	}
		1761
		1762	void
		1763	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1764	PPCODE:
		1765	{
		1766	dREQ;
		1767
		1768	req->type = REQ_MKDIR;
		1769	req->sv1 = newSVsv (pathname);
		1770	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1771	req->mode = mode;
		1772
		1773	REQ_SEND;
		1774	}
		1775
		1776	void
		1777	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1778	ALIAS:
		1779	aio_link = REQ_LINK
		1780	aio_symlink = REQ_SYMLINK
		1781	aio_rename = REQ_RENAME
		1782	PPCODE:
		1783	{
		1784	dREQ;
		1785
		1786	req->type = ix;
		1787	req->sv2 = newSVsv (oldpath);
		1788	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1789	req->sv1 = newSVsv (newpath);
		1790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1791
		1792	REQ_SEND;
		1793	}
		1794
		1795	void
		1796	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1797	PPCODE:
		1798	{
		1799	dREQ;
		1800
		1801	req->type = REQ_MKNOD;
		1802	req->sv1 = newSVsv (pathname);
		1803	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1804	req->mode = (mode_t)mode;
		1805	req->offs = dev;
		1806
		1807	REQ_SEND;
		1808	}
		1809
		1810	void
		1811	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1812	PPCODE:
		1813	{
		1814	dREQ;
		1815
		1816	req->type = REQ_BUSY;
		1817	req->nv1 = delay < 0. ? 0. : delay;
		1818
		1819	REQ_SEND;
		1820	}
		1821
		1822	void
		1823	aio_group (SV *callback=&PL_sv_undef)
		1824	PROTOTYPE: ;$
		1825	PPCODE:
		1826	{
		1827	dREQ;
		1828
		1829	req->type = REQ_GROUP;
		1830
		1831	req_send (req);
		1832	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1833	}
		1834
		1835	void
		1836	aio_nop (SV *callback=&PL_sv_undef)
		1837	PPCODE:
		1838	{
		1839	dREQ;
		1840
		1841	req->type = REQ_NOP;
		1842
		1843	REQ_SEND;
		1844	}
		1845
		1846	int
		1847	aioreq_pri (int pri = 0)
		1848	PROTOTYPE: ;$
559	CODE:	1849	CODE:
560	{	1850	RETVAL = next_pri - PRI_BIAS;
561	aio_req req;	1851	if (items > 0)
562		1852	{
563	Newz (0, req, 1, aio_cb);	1853	if (pri < PRI_MIN) pri = PRI_MIN;
564		1854	if (pri > PRI_MAX) pri = PRI_MAX;
565	if (!req)	1855	next_pri = pri + PRI_BIAS;
566	croak ("out of memory during aio_req allocation");	1856	}
567		1857	OUTPUT:
568	req->type = REQ_UNLINK;	1858	RETVAL
569	req->data = newSVsv (pathname);
570	req->dataptr = SvPV_nolen (req->data);
571	req->callback = SvREFCNT_inc (callback);
572
573	send_req (req);
574	}
575		1859
576	void	1860	void
		1861	aioreq_nice (int nice = 0)
		1862	CODE:
		1863	nice = next_pri - nice;
		1864	if (nice < PRI_MIN) nice = PRI_MIN;
		1865	if (nice > PRI_MAX) nice = PRI_MAX;
		1866	next_pri = nice + PRI_BIAS;
		1867
		1868	void
577	flush()	1869	flush ()
578	PROTOTYPE:	1870	PROTOTYPE:
579	CODE:	1871	CODE:
580	while (nreqs)	1872	while (nreqs)
581	{	1873	{
582	poll_wait ();	1874	poll_wait ();
583	poll_cb ();	1875	poll_cb ();
584	}	1876	}
585		1877
586	void	1878	int
587	poll()	1879	poll()
588	PROTOTYPE:	1880	PROTOTYPE:
589	CODE:	1881	CODE:
590	if (nreqs)
591	{
592	poll_wait ();	1882	poll_wait ();
593	poll_cb ();	1883	RETVAL = poll_cb ();
594	}	1884	OUTPUT:
		1885	RETVAL
595		1886
596	int	1887	int
597	poll_fileno()	1888	poll_fileno()
598	PROTOTYPE:	1889	PROTOTYPE:
599	CODE:	1890	CODE:
…		…
611		1902
612	void	1903	void
613	poll_wait()	1904	poll_wait()
614	PROTOTYPE:	1905	PROTOTYPE:
615	CODE:	1906	CODE:
616	if (nreqs)
617	poll_wait ();	1907	poll_wait ();
		1908
		1909	void
		1910	setsig (int signum = SIGIO)
		1911	PROTOTYPE: ;$
		1912	CODE:
		1913	{
		1914	if (block_sig_level)
		1915	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1916
		1917	X_LOCK (reslock);
		1918	main_tid = pthread_self ();
		1919	main_sig = signum;
		1920	X_UNLOCK (reslock);
		1921
		1922	if (main_sig && npending)
		1923	pthread_kill (main_tid, main_sig);
		1924	}
		1925
		1926	void
		1927	aio_block (SV *cb)
		1928	PROTOTYPE: &
		1929	PPCODE:
		1930	{
		1931	int count;
		1932
		1933	block_sig ();
		1934	PUSHMARK (SP);
		1935	PUTBACK;
		1936	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1937	SPAGAIN;
		1938	unblock_sig ();
		1939
		1940	if (SvTRUE (ERRSV))
		1941	croak (0);
		1942
		1943	XSRETURN (count);
		1944	}
618		1945
619	int	1946	int
620	nreqs()	1947	nreqs()
621	PROTOTYPE:	1948	PROTOTYPE:
622	CODE:	1949	CODE:
623	RETVAL = nreqs;	1950	RETVAL = nreqs;
624	OUTPUT:	1951	OUTPUT:
625	RETVAL	1952	RETVAL
626		1953
		1954	int
		1955	nready()
		1956	PROTOTYPE:
		1957	CODE:
		1958	RETVAL = get_nready ();
		1959	OUTPUT:
		1960	RETVAL
		1961
		1962	int
		1963	npending()
		1964	PROTOTYPE:
		1965	CODE:
		1966	RETVAL = get_npending ();
		1967	OUTPUT:
		1968	RETVAL
		1969
		1970	int
		1971	nthreads()
		1972	PROTOTYPE:
		1973	CODE:
		1974	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1975	RETVAL = started;
		1976	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1977	OUTPUT:
		1978	RETVAL
		1979
		1980	PROTOTYPES: DISABLE
		1981
		1982	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1983
		1984	void
		1985	cancel (aio_req_ornot req)
		1986	CODE:
		1987	req_cancel (req);
		1988
		1989	void
		1990	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1991	CODE:
		1992	SvREFCNT_dec (req->callback);
		1993	req->callback = newSVsv (callback);
		1994
		1995	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1996
		1997	void
		1998	add (aio_req grp, ...)
		1999	PPCODE:
		2000	{
		2001	int i;
		2002	aio_req req;
		2003
		2004	if (main_sig && !block_sig_level)
		2005	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		2006
		2007	if (grp->int1 == 2)
		2008	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2009
		2010	for (i = 1; i < items; ++i )
		2011	{
		2012	if (GIMME_V != G_VOID)
		2013	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2014
		2015	req = SvAIO_REQ (ST (i));
		2016
		2017	if (req)
		2018	{
		2019	++grp->size;
		2020	req->grp = grp;
		2021
		2022	req->grp_prev = 0;
		2023	req->grp_next = grp->grp_first;
		2024
		2025	if (grp->grp_first)
		2026	grp->grp_first->grp_prev = req;
		2027
		2028	grp->grp_first = req;
		2029	}
		2030	}
		2031	}
		2032
		2033	void
		2034	cancel_subs (aio_req_ornot req)
		2035	CODE:
		2036	req_cancel_subs (req);
		2037
		2038	void
		2039	result (aio_req grp, ...)
		2040	CODE:
		2041	{
		2042	int i;
		2043	AV *av;
		2044
		2045	grp->errorno = errno;
		2046
		2047	av = newAV ();
		2048
		2049	for (i = 1; i < items; ++i )
		2050	av_push (av, newSVsv (ST (i)));
		2051
		2052	SvREFCNT_dec (grp->sv1);
		2053	grp->sv1 = (SV *)av;
		2054	}
		2055
		2056	void
		2057	errno (aio_req grp, int errorno = errno)
		2058	CODE:
		2059	grp->errorno = errorno;
		2060
		2061	void
		2062	limit (aio_req grp, int limit)
		2063	CODE:
		2064	grp->int2 = limit;
		2065	aio_grp_feed (grp);
		2066
		2067	void
		2068	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2069	CODE:
		2070	{
		2071	SvREFCNT_dec (grp->sv2);
		2072	grp->sv2 = newSVsv (callback);
		2073
		2074	if (grp->int2 <= 0)
		2075	grp->int2 = 2;
		2076
		2077	aio_grp_feed (grp);
		2078	}
		2079

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