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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.110 by root, Sun Dec 2 20:54:33 2007 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include <stddef.h>
		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	#include <unistd.h>	14	#include <limits.h>
10	#include <fcntl.h>	15	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	16	#include <sched.h>
13	#include <endian.h>
14		17
15	#include <pthread.h>	18	#ifdef _WIN32
16	#include <sys/syscall.h>
17		19
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	20	# define SIGIO 0
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	typedef Direntry_t X_DIRENT;
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	22	#undef malloc
		23	#undef free
21		24
22	#if __i386 || __amd64	25	// perl overrides all those nice win32 functions
23	# define STACKSIZE ( 256 * sizeof (long))	26	# undef open
24	#elif __ia64	27	# undef read
25	# define STACKSIZE (8192 * sizeof (long))	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
26	#else	57	#else
27	# define STACKSIZE ( 512 * sizeof (long))	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
28	#endif	67	#endif
		68
		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
		83
		84	/* number of seconds after which idle threads exit */
		85	#define IDLE_TIMEOUT 10
		86
		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 */
		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
		98	#else
		99	# define SvVAL64 SvNV
		100	#endif
		101
		102	static HV *stash;
		103
		104	#define dBUF \
		105	char *aio_buf; \
		106	X_LOCK (wrklock); \
		107	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		108	X_UNLOCK (wrklock); \
		109	if (!aio_buf) \
		110	return -1;
		111
		112	typedef SV SV8; /* byte-sv, used for argument-checking */
29		113
30	enum {	114	enum {
31	REQ_QUIT,	115	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	116	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	117	REQ_READ, REQ_WRITE,
		118	REQ_READAHEAD, REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	119	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		120	REQ_TRUNCATE, REQ_FTRUNCATE,
		121	REQ_UTIME, REQ_FUTIME,
		122	REQ_CHMOD, REQ_FCHMOD,
		123	REQ_CHOWN, REQ_FCHOWN,
35	REQ_FSYNC, REQ_FDATASYNC,	124	REQ_SYNC, REQ_FSYNC, REQ_FDATASYNC,
		125	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
		126	REQ_MKNOD, REQ_READDIR,
		127	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		128	REQ_GROUP, REQ_NOP,
		129	REQ_BUSY,
36	};	130	};
37		131
		132	#define AIO_REQ_KLASS "IO::AIO::REQ"
		133	#define AIO_GRP_KLASS "IO::AIO::GRP"
		134
38	typedef struct aio_cb {	135	typedef struct aio_cb
		136	{
39	struct aio_cb *next;	137	struct aio_cb *volatile next;
40		138
		139	SV *callback;
		140	SV *sv1, *sv2;
		141	void *ptr1, *ptr2;
		142	off_t offs;
		143	size_t size;
		144	ssize_t result;
		145	double nv1, nv2;
		146
		147	STRLEN stroffset;
41	int type;	148	int type;
42		149	int int1, int2, int3;
43	int fd;	150	int errorno;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */	151	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52		152
53	Stat_t *statdata;	153	unsigned char flags;
		154	unsigned char pri;
		155
		156	SV *self; /* the perl counterpart of this request, if any */
		157	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54	} aio_cb;	158	} aio_cb;
55		159
		160	enum {
		161	FLAG_CANCELLED = 0x01, /* request was cancelled */
		162	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		163	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		164	};
		165
56	typedef aio_cb *aio_req;	166	typedef aio_cb *aio_req;
		167	typedef aio_cb *aio_req_ornot;
57		168
58	static int started;	169	enum {
		170	PRI_MIN = -4,
		171	PRI_MAX = 4,
		172
		173	DEFAULT_PRI = 0,
		174	PRI_BIAS = -PRI_MIN,
		175	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		176	};
		177
		178	#define AIO_TICKS ((1000000 + 1023) >> 10)
		179
		180	static unsigned int max_poll_time = 0;
		181	static unsigned int max_poll_reqs = 0;
		182
		183	/* calculcate time difference in ~1/AIO_TICKS of a second */
		184	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		185	{
		186	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		187	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		188	}
		189
		190	static thread_t main_tid;
59	static int nreqs;	191	static int main_sig;
60	static int reqpipe[2], respipe[2];	192	static int block_sig_level;
61		193
62	static aio_req qs, qe; /* queue start, queue end */	194	void block_sig ()
63
64	static void *aio_proc(void *arg);
65
66	static void
67	start_thread (void)
68	{	195	{
69	sigset_t fullsigset, oldsigset;	196	sigset_t ss;
		197
		198	if (block_sig_level++)
		199	return;
		200
		201	if (!main_sig)
		202	return;
		203
		204	sigemptyset (&ss);
		205	sigaddset (&ss, main_sig);
		206	pthread_sigmask (SIG_BLOCK, &ss, 0);
		207	}
		208
		209	void unblock_sig ()
		210	{
		211	sigset_t ss;
		212
		213	if (--block_sig_level)
		214	return;
		215
		216	if (!main_sig)
		217	return;
		218
		219	sigemptyset (&ss);
		220	sigaddset (&ss, main_sig);
		221	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		222	}
		223
		224	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		225
		226	static unsigned int started, idle, wanted;
		227
		228	/* worker threads management */
		229	static mutex_t wrklock = X_MUTEX_INIT;
		230
		231	typedef struct worker {
		232	/* locked by wrklock */
		233	struct worker *prev, *next;
		234
70	pthread_t tid;	235	thread_t tid;
71	pthread_attr_t attr;
72		236
73	pthread_attr_init (&attr);	237	/* locked by reslock, reqlock or wrklock */
74	pthread_attr_setstacksize (&attr, STACKSIZE);	238	aio_req req; /* currently processed request */
75	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	239	void *dbuf;
		240	DIR *dirp;
		241	} worker;
76		242
77	sigfillset (&fullsigset);	243	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
78	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79		244
80	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	245	static void worker_clear (worker *wrk)
81	started++;
82
83	sigprocmask (SIG_SETMASK, &oldsigset, 0);
84	}
85
86	static void
87	send_reqs (void)
88	{	246	{
89	/* this write is atomic */	247	if (wrk->dirp)
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91	{	248	{
92	qs = qs->next;	249	closedir (wrk->dirp);
93	if (!qs) qe = 0;	250	wrk->dirp = 0;
94	}	251	}
95	}
96		252
97	static void	253	if (wrk->dbuf)
98	send_req (aio_req req)	254	{
		255	free (wrk->dbuf);
		256	wrk->dbuf = 0;
		257	}
		258	}
		259
		260	static void worker_free (worker *wrk)
99	{	261	{
100	nreqs++;	262	wrk->next->prev = wrk->prev;
		263	wrk->prev->next = wrk->next;
		264
		265	free (wrk);
		266	}
		267
		268	static volatile unsigned int nreqs, nready, npending;
		269	static volatile unsigned int max_idle = 4;
		270	static volatile unsigned int max_outstanding = 0xffffffff;
		271	static int respipe_osf [2], respipe [2] = { -1, -1 };
		272
		273	static mutex_t reslock = X_MUTEX_INIT;
		274	static mutex_t reqlock = X_MUTEX_INIT;
		275	static cond_t reqwait = X_COND_INIT;
		276
		277	#if WORDACCESS_UNSAFE
		278
		279	static unsigned int get_nready ()
		280	{
		281	unsigned int retval;
		282
		283	X_LOCK (reqlock);
		284	retval = nready;
		285	X_UNLOCK (reqlock);
		286
		287	return retval;
		288	}
		289
		290	static unsigned int get_npending ()
		291	{
		292	unsigned int retval;
		293
		294	X_LOCK (reslock);
		295	retval = npending;
		296	X_UNLOCK (reslock);
		297
		298	return retval;
		299	}
		300
		301	static unsigned int get_nthreads ()
		302	{
		303	unsigned int retval;
		304
		305	X_LOCK (wrklock);
		306	retval = started;
		307	X_UNLOCK (wrklock);
		308
		309	return retval;
		310	}
		311
		312	#else
		313
		314	# define get_nready() nready
		315	# define get_npending() npending
		316	# define get_nthreads() started
		317
		318	#endif
		319
		320	/*
		321	* a somewhat faster data structure might be nice, but
		322	* with 8 priorities this actually needs <20 insns
		323	* per shift, the most expensive operation.
		324	*/
		325	typedef struct {
		326	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		327	int size;
		328	} reqq;
		329
		330	static reqq req_queue;
		331	static reqq res_queue;
		332
		333	int reqq_push (reqq *q, aio_req req)
		334	{
		335	int pri = req->pri;
101	req->next = 0;	336	req->next = 0;
102		337
103	if (qe)	338	if (q->qe[pri])
104	{	339	{
105	qe->next = req;	340	q->qe[pri]->next = req;
106	qe = req;	341	q->qe[pri] = req;
107	}	342	}
108	else	343	else
109	qe = qs = req;	344	q->qe[pri] = q->qs[pri] = req;
110		345
111	send_reqs ();	346	return q->size++;
112	}	347	}
		348
		349	aio_req reqq_shift (reqq *q)
		350	{
		351	int pri;
		352
		353	if (!q->size)
		354	return 0;
		355
		356	--q->size;
		357
		358	for (pri = NUM_PRI; pri--; )
		359	{
		360	aio_req req = q->qs[pri];
		361
		362	if (req)
		363	{
		364	if (!(q->qs[pri] = req->next))
		365	q->qe[pri] = 0;
		366
		367	return req;
		368	}
		369	}
		370
		371	abort ();
		372	}
		373
		374	static int poll_cb ();
		375	static int req_invoke (aio_req req);
		376	static void req_destroy (aio_req req);
		377	static void req_cancel (aio_req req);
		378
		379	/* must be called at most once */
		380	static SV *req_sv (aio_req req, const char *klass)
		381	{
		382	if (!req->self)
		383	{
		384	req->self = (SV *)newHV ();
		385	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		386	}
		387
		388	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		389	}
		390
		391	static aio_req SvAIO_REQ (SV *sv)
		392	{
		393	MAGIC *mg;
		394
		395	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		396	croak ("object of class " AIO_REQ_KLASS " expected");
		397
		398	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		399
		400	return mg ? (aio_req)mg->mg_ptr : 0;
		401	}
		402
		403	static void aio_grp_feed (aio_req grp)
		404	{
		405	block_sig ();
		406
		407	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		408	{
		409	int old_len = grp->size;
		410
		411	if (grp->sv2 && SvOK (grp->sv2))
		412	{
		413	dSP;
		414
		415	ENTER;
		416	SAVETMPS;
		417	PUSHMARK (SP);
		418	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		419	PUTBACK;
		420	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		421	SPAGAIN;
		422	FREETMPS;
		423	LEAVE;
		424	}
		425
		426	/* stop if no progress has been made */
		427	if (old_len == grp->size)
		428	{
		429	SvREFCNT_dec (grp->sv2);
		430	grp->sv2 = 0;
		431	break;
		432	}
		433	}
		434
		435	unblock_sig ();
		436	}
		437
		438	static void aio_grp_dec (aio_req grp)
		439	{
		440	--grp->size;
		441
		442	/* call feeder, if applicable */
		443	aio_grp_feed (grp);
		444
		445	/* finish, if done */
		446	if (!grp->size && grp->int1)
		447	{
		448	block_sig ();
		449
		450	if (!req_invoke (grp))
		451	{
		452	req_destroy (grp);
		453	unblock_sig ();
		454	croak (0);
		455	}
		456
		457	req_destroy (grp);
		458	unblock_sig ();
		459	}
		460	}
		461
		462	static int req_invoke (aio_req req)
		463	{
		464	dSP;
		465
		466	if (req->flags & FLAG_SV2_RO_OFF)
		467	SvREADONLY_off (req->sv2);
		468
		469	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		470	{
		471	ENTER;
		472	SAVETMPS;
		473	PUSHMARK (SP);
		474	EXTEND (SP, 1);
		475
		476	switch (req->type)
		477	{
		478	case REQ_READDIR:
		479	{
		480	SV *rv = &PL_sv_undef;
		481
		482	if (req->result >= 0)
		483	{
		484	int i;
		485	char *buf = req->ptr2;
		486	AV *av = newAV ();
		487
		488	av_extend (av, req->result - 1);
		489
		490	for (i = 0; i < req->result; ++i)
		491	{
		492	SV *sv = newSVpv (buf, 0);
		493
		494	av_store (av, i, sv);
		495	buf += SvCUR (sv) + 1;
		496	}
		497
		498	rv = sv_2mortal (newRV_noinc ((SV *)av));
		499	}
		500
		501	PUSHs (rv);
		502	}
		503	break;
		504
		505	case REQ_OPEN:
		506	{
		507	/* convert fd to fh */
		508	SV *fh = &PL_sv_undef;
		509
		510	if (req->result >= 0)
		511	{
		512	GV *gv = (GV *)sv_newmortal ();
		513	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		514	char sym [64];
		515	int symlen;
		516
		517	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		518	gv_init (gv, stash, sym, symlen, 0);
		519
		520	symlen = snprintf (
		521	sym,
		522	sizeof (sym),
		523	"%s&=%d",
		524	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		525	req->result
		526	);
		527
		528	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		529	fh = (SV *)gv;
		530	}
		531
		532	PUSHs (fh);
		533	}
		534	break;
		535
		536	case REQ_GROUP:
		537	req->int1 = 2; /* mark group as finished */
		538
		539	if (req->sv1)
		540	{
		541	int i;
		542	AV *av = (AV *)req->sv1;
		543
		544	EXTEND (SP, AvFILL (av) + 1);
		545	for (i = 0; i <= AvFILL (av); ++i)
		546	PUSHs (*av_fetch (av, i, 0));
		547	}
		548	break;
		549
		550	case REQ_NOP:
		551	case REQ_BUSY:
		552	break;
		553
		554	case REQ_READLINK:
		555	if (req->result > 0)
		556	{
		557	SvCUR_set (req->sv2, req->result);
		558	*SvEND (req->sv2) = 0;
		559	PUSHs (req->sv2);
		560	}
		561	break;
		562
		563	case REQ_STAT:
		564	case REQ_LSTAT:
		565	case REQ_FSTAT:
		566	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		567	PL_laststatval = req->result;
		568	PL_statcache = *(Stat_t *)(req->ptr2);
		569	PUSHs (sv_2mortal (newSViv (req->result)));
		570	break;
		571
		572	case REQ_READ:
		573	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		574	*SvEND (req->sv2) = 0;
		575	PUSHs (sv_2mortal (newSViv (req->result)));
		576	break;
		577
		578	default:
		579	PUSHs (sv_2mortal (newSViv (req->result)));
		580	break;
		581	}
		582
		583	errno = req->errorno;
		584
		585	PUTBACK;
		586	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		587	SPAGAIN;
		588
		589	FREETMPS;
		590	LEAVE;
		591
		592	PUTBACK;
		593	}
		594
		595	if (req->grp)
		596	{
		597	aio_req grp = req->grp;
		598
		599	/* unlink request */
		600	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		601	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		602
		603	if (grp->grp_first == req)
		604	grp->grp_first = req->grp_next;
		605
		606	aio_grp_dec (grp);
		607	}
		608
		609	return !SvTRUE (ERRSV);
		610	}
		611
		612	static void req_destroy (aio_req req)
		613	{
		614	if (req->self)
		615	{
		616	sv_unmagic (req->self, PERL_MAGIC_ext);
		617	SvREFCNT_dec (req->self);
		618	}
		619
		620	SvREFCNT_dec (req->sv1);
		621	SvREFCNT_dec (req->sv2);
		622	SvREFCNT_dec (req->callback);
		623
		624	if (req->flags & FLAG_PTR2_FREE)
		625	free (req->ptr2);
		626
		627	Safefree (req);
		628	}
		629
		630	static void req_cancel_subs (aio_req grp)
		631	{
		632	aio_req sub;
		633
		634	if (grp->type != REQ_GROUP)
		635	return;
		636
		637	SvREFCNT_dec (grp->sv2);
		638	grp->sv2 = 0;
		639
		640	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		641	req_cancel (sub);
		642	}
		643
		644	static void req_cancel (aio_req req)
		645	{
		646	req->flags |= FLAG_CANCELLED;
		647
		648	req_cancel_subs (req);
		649	}
		650
		651	#ifdef USE_SOCKETS_AS_HANDLES
		652	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		653	#else
		654	# define TO_SOCKET(x) (x)
		655	#endif
113		656
114	static void	657	static void
115	end_thread (void)	658	create_respipe ()
116	{	659	{
117	aio_req req;	660	int old_readfd = respipe [0];
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120		661
121	send_req (req);	662	if (respipe [1] >= 0)
122	}	663	respipe_close (TO_SOCKET (respipe [1]));
123		664
124	static void	665	#ifdef _WIN32
125	read_write (pTHX_	666	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
126	int dowrite, int fd, off_t offset, size_t length,	667	#else
127	SV *data, STRLEN dataoffset, SV *callback)	668	if (pipe (respipe))
128	{	669	#endif
129	aio_req req;	670	croak ("unable to initialize result pipe");
130	STRLEN svlen;
131	char *svptr = SvPV (data, svlen);
132		671
133	SvUPGRADE (data, SVt_PV);	672	if (old_readfd >= 0)
134	SvPOK_on (data);
135
136	if (dataoffset < 0)
137	dataoffset += svlen;
138
139	if (dataoffset < 0 || dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{	673	{
144	/* write: check length and adjust. */	674	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
145	if (length < 0 || length + dataoffset > svlen)	675	croak ("unable to initialize result pipe(2)");
146	length = svlen - dataoffset;	676
		677	respipe_close (respipe [0]);
		678	respipe [0] = old_readfd;
		679	}
		680
		681	#ifdef _WIN32
		682	int arg = 1;
		683	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		684	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		685	#else
		686	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		687	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		688	#endif
		689	croak ("unable to initialize result pipe(3)");
		690
		691	respipe_osf [0] = TO_SOCKET (respipe [0]);
		692	respipe_osf [1] = TO_SOCKET (respipe [1]);
		693	}
		694
		695	X_THREAD_PROC (aio_proc);
		696
		697	static void start_thread (void)
		698	{
		699	worker *wrk = calloc (1, sizeof (worker));
		700
		701	if (!wrk)
		702	croak ("unable to allocate worker thread data");
		703
		704	X_LOCK (wrklock);
		705
		706	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
		707	{
		708	wrk->prev = &wrk_first;
		709	wrk->next = wrk_first.next;
		710	wrk_first.next->prev = wrk;
		711	wrk_first.next = wrk;
		712	++started;
147	}	713	}
148	else	714	else
		715	free (wrk);
		716
		717	X_UNLOCK (wrklock);
		718	}
		719
		720	static void maybe_start_thread ()
		721	{
		722	if (get_nthreads () >= wanted)
		723	return;
		724
		725	/* todo: maybe use idle here, but might be less exact */
		726	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		727	return;
		728
		729	start_thread ();
		730	}
		731
		732	static void req_send (aio_req req)
		733	{
		734	block_sig ();
		735
		736	++nreqs;
		737
		738	X_LOCK (reqlock);
		739	++nready;
		740	reqq_push (&req_queue, req);
		741	X_COND_SIGNAL (reqwait);
		742	X_UNLOCK (reqlock);
		743
		744	unblock_sig ();
		745
		746	maybe_start_thread ();
		747	}
		748
		749	static void end_thread (void)
		750	{
		751	aio_req req;
		752
		753	Newz (0, req, 1, aio_cb);
		754
		755	req->type = REQ_QUIT;
		756	req->pri = PRI_MAX + PRI_BIAS;
		757
		758	X_LOCK (reqlock);
		759	reqq_push (&req_queue, req);
		760	X_COND_SIGNAL (reqwait);
		761	X_UNLOCK (reqlock);
		762
		763	X_LOCK (wrklock);
		764	--started;
		765	X_UNLOCK (wrklock);
		766	}
		767
		768	static void set_max_idle (int nthreads)
		769	{
		770	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		771	max_idle = nthreads <= 0 ? 1 : nthreads;
		772	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		773	}
		774
		775	static void min_parallel (int nthreads)
		776	{
		777	if (wanted < nthreads)
		778	wanted = nthreads;
		779	}
		780
		781	static void max_parallel (int nthreads)
		782	{
		783	if (wanted > nthreads)
		784	wanted = nthreads;
		785
		786	while (started > wanted)
		787	end_thread ();
		788	}
		789
		790	static void poll_wait ()
		791	{
		792	fd_set rfd;
		793
		794	while (nreqs)
149	{	795	{
150	/* read: grow scalar as necessary */	796	int size;
151	svptr = SvGROW (data, length + dataoffset);	797	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		798	size = res_queue.size;
		799	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		800
		801	if (size)
		802	return;
		803
		804	maybe_start_thread ();
		805
		806	FD_ZERO (&rfd);
		807	FD_SET (respipe [0], &rfd);
		808
		809	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
152	}	810	}
153
154	if (length < 0)
155	croak ("length must not be negative");
156
157	Newz (0, req, 1, aio_cb);
158
159	if (!req)
160	croak ("out of memory during aio_req allocation");
161
162	req->type = dowrite ? REQ_WRITE : REQ_READ;
163	req->fd = fd;
164	req->offset = offset;
165	req->length = length;
166	req->data = SvREFCNT_inc (data);
167	req->dataptr = (char *)svptr + dataoffset;
168	req->callback = SvREFCNT_inc (callback);
169
170	send_req (req);
171	}	811	}
172		812
173	static void	813	static int poll_cb ()
174	poll_wait ()
175	{
176	fd_set rfd;
177	FD_ZERO(&rfd);
178	FD_SET(respipe[0], &rfd);
179
180	select (respipe[0] + 1, &rfd, 0, 0, 0);
181	}
182
183	static int
184	poll_cb (pTHX)
185	{	814	{
186	dSP;	815	dSP;
187	int count = 0;	816	int count = 0;
		817	int maxreqs = max_poll_reqs;
		818	int do_croak = 0;
		819	struct timeval tv_start, tv_now;
188	aio_req req;	820	aio_req req;
189		821
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	822	if (max_poll_time)
		823	gettimeofday (&tv_start, 0);
		824
		825	block_sig ();
		826
		827	for (;;)
191	{	828	{
192	nreqs--;	829	for (;;)
193
194	if (req->type == REQ_QUIT)
195	started--;
196	else
197	{	830	{
198	int errorno = errno;	831	maybe_start_thread ();
199	errno = req->errorno;
200		832
201	if (req->type == REQ_READ)	833	X_LOCK (reslock);
202	SvCUR_set (req->data, req->dataoffset	834	req = reqq_shift (&res_queue);
203	+ req->result > 0 ? req->result : 0);
204		835
205	if (req->data)	836	if (req)
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209	{	837	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	838	--npending;
211	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);
213		839
214	Safefree (req->statdata);	840	if (!res_queue.size)
		841	{
		842	/* read any signals sent by the worker threads */
		843	char buf [4];
		844	while (respipe_read (respipe [0], buf, 4) == 4)
		845	;
		846	}
215	}	847	}
216		848
217	PUSHMARK (SP);	849	X_UNLOCK (reslock);
218	XPUSHs (sv_2mortal (newSViv (req->result)));
219		850
		851	if (!req)
		852	break;
		853
		854	--nreqs;
		855
220	if (req->type == REQ_OPEN)	856	if (req->type == REQ_GROUP && req->size)
221	{	857	{
222	/* convert fd to fh */	858	req->int1 = 1; /* mark request as delayed */
223	SV *fh;	859	continue;
224
225	PUTBACK;
226	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227	SPAGAIN;
228
229	fh = POPs;
230
231	PUSHMARK (SP);
232	XPUSHs (fh);
233	}	860	}
		861	else
		862	{
		863	if (!req_invoke (req))
		864	{
		865	req_destroy (req);
		866	unblock_sig ();
		867	croak (0);
		868	}
234		869
235	PUTBACK;	870	count++;
236	call_sv (req->callback, G_VOID | G_EVAL);	871	}
237	SPAGAIN;	872
		873	req_destroy (req);
		874
		875	if (maxreqs && !--maxreqs)
		876	break;
		877
		878	if (max_poll_time)
		879	{
		880	gettimeofday (&tv_now, 0);
		881
		882	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		883	break;
		884	}
		885	}
		886
		887	if (nreqs <= max_outstanding)
		888	break;
		889
		890	poll_wait ();
		891
		892	++maxreqs;
		893	}
		894
		895	unblock_sig ();
		896	return count;
		897	}
		898
		899	/*****************************************************************************/
		900	/* work around various missing functions */
		901
		902	#if !HAVE_PREADWRITE
		903	# define pread aio_pread
		904	# define pwrite aio_pwrite
		905
		906	/*
		907	* make our pread/pwrite safe against themselves, but not against
		908	* normal read/write by using a mutex. slows down execution a lot,
		909	* but that's your problem, not mine.
		910	*/
		911	static mutex_t preadwritelock = X_MUTEX_INIT;
		912
		913	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		914	{
		915	ssize_t res;
		916	off_t ooffset;
		917
		918	X_LOCK (preadwritelock);
		919	ooffset = lseek (fd, 0, SEEK_CUR);
		920	lseek (fd, offset, SEEK_SET);
		921	res = read (fd, buf, count);
		922	lseek (fd, ooffset, SEEK_SET);
		923	X_UNLOCK (preadwritelock);
		924
		925	return res;
		926	}
		927
		928	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		929	{
		930	ssize_t res;
		931	off_t ooffset;
		932
		933	X_LOCK (preadwritelock);
		934	ooffset = lseek (fd, 0, SEEK_CUR);
		935	lseek (fd, offset, SEEK_SET);
		936	res = write (fd, buf, count);
		937	lseek (fd, offset, SEEK_SET);
		938	X_UNLOCK (preadwritelock);
		939
		940	return res;
		941	}
		942	#endif
		943
		944	#ifndef HAVE_FUTIMES
		945
		946	# define utimes(path,times) aio_utimes (path, times)
		947	# define futimes(fd,times) aio_futimes (fd, times)
		948
		949	int aio_utimes (const char *filename, const struct timeval times[2])
		950	{
		951	if (times)
		952	{
		953	struct utimbuf buf;
		954
		955	buf.actime = times[0].tv_sec;
		956	buf.modtime = times[1].tv_sec;
		957
		958	return utime (filename, &buf);
		959	}
		960	else
		961	return utime (filename, 0);
		962	}
		963
		964	int aio_futimes (int fd, const struct timeval tv[2])
		965	{
		966	errno = ENOSYS;
		967	return -1;
		968	}
		969
		970	#endif
		971
		972	#if !HAVE_FDATASYNC
		973	# define fdatasync fsync
		974	#endif
		975
		976	#if !HAVE_READAHEAD
		977	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
		978
		979	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
		980	{
		981	size_t todo = count;
		982	dBUF;
		983
		984	while (todo > 0)
		985	{
		986	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
		987
		988	pread (fd, aio_buf, len, offset);
		989	offset += len;
		990	todo -= len;
		991	}
		992
		993	errno = 0;
		994	return count;
		995	}
		996
		997	#endif
		998
		999	#if !HAVE_READDIR_R
		1000	# define readdir_r aio_readdir_r
		1001
		1002	static mutex_t readdirlock = X_MUTEX_INIT;
		1003
		1004	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
		1005	{
		1006	X_DIRENT *e;
		1007	int errorno;
		1008
		1009	X_LOCK (readdirlock);
		1010
		1011	e = readdir (dirp);
		1012	errorno = errno;
		1013
		1014	if (e)
		1015	{
		1016	*res = ent;
		1017	strcpy (ent->d_name, e->d_name);
		1018	}
		1019	else
		1020	*res = 0;
		1021
		1022	X_UNLOCK (readdirlock);
		1023
		1024	errno = errorno;
		1025	return e ? 0 : -1;
		1026	}
		1027	#endif
		1028
		1029	/* sendfile always needs emulation */
		1030	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		1031	{
		1032	ssize_t res;
		1033
		1034	if (!count)
		1035	return 0;
		1036
		1037	#if HAVE_SENDFILE
		1038	# if __linux
		1039	res = sendfile (ofd, ifd, &offset, count);
		1040
		1041	# elif __freebsd
		1042	/*
		1043	* Of course, the freebsd sendfile is a dire hack with no thoughts
		1044	* wasted on making it similar to other I/O functions.
		1045	*/
		1046	{
		1047	off_t sbytes;
		1048	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		1049
		1050	if (res < 0 && sbytes)
		1051	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		1052	res = sbytes;
		1053	}
		1054
		1055	# elif __hpux
		1056	res = sendfile (ofd, ifd, offset, count, 0, 0);
		1057
		1058	# elif __solaris
		1059	{
		1060	struct sendfilevec vec;
		1061	size_t sbytes;
		1062
		1063	vec.sfv_fd = ifd;
		1064	vec.sfv_flag = 0;
		1065	vec.sfv_off = offset;
		1066	vec.sfv_len = count;
		1067
		1068	res = sendfilev (ofd, &vec, 1, &sbytes);
		1069
		1070	if (res < 0 && sbytes)
		1071	res = sbytes;
		1072	}
		1073
		1074	# endif
		1075	#else
		1076	res = -1;
		1077	errno = ENOSYS;
		1078	#endif
		1079
		1080	if (res < 0
		1081	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1082	#if __solaris
		1083	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		1084	#endif
		1085	)
		1086	)
		1087	{
		1088	/* emulate sendfile. this is a major pain in the ass */
		1089	dBUF;
		1090
		1091	res = 0;
		1092
		1093	while (count)
		1094	{
		1095	ssize_t cnt;
238		1096
239	if (req->callback)	1097	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
240	SvREFCNT_dec (req->callback);
241		1098
242	errno = errorno;	1099	if (cnt <= 0)
		1100	{
		1101	if (cnt && !res) res = -1;
		1102	break;
		1103	}
		1104
		1105	cnt = write (ofd, aio_buf, cnt);
		1106
		1107	if (cnt <= 0)
		1108	{
		1109	if (cnt && !res) res = -1;
		1110	break;
		1111	}
		1112
		1113	offset += cnt;
		1114	res += cnt;
243	count++;	1115	count -= cnt;
244	}	1116	}
245
246	Safefree (req);
247	}	1117	}
248		1118
249	if (qs)	1119	return res;
250	send_reqs ();
251
252	return count;
253	}	1120	}
254		1121
255	static void *	1122	/* read a full directory */
256	aio_proc (void *thr_arg)	1123	static void scandir_ (aio_req req, worker *self)
257	{	1124	{
		1125	DIR *dirp;
		1126	union
		1127	{
		1128	X_DIRENT d;
		1129	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
		1130	} *u;
		1131	X_DIRENT *entp;
		1132	char *name, *names;
		1133	int memlen = 4096;
		1134	int memofs = 0;
		1135	int res = 0;
		1136
		1137	X_LOCK (wrklock);
		1138	self->dirp = dirp = opendir (req->ptr1);
		1139	self->dbuf = u = malloc (sizeof (*u));
		1140	req->flags |= FLAG_PTR2_FREE;
		1141	req->ptr2 = names = malloc (memlen);
		1142	X_UNLOCK (wrklock);
		1143
		1144	if (dirp && u && names)
		1145	for (;;)
		1146	{
		1147	errno = 0;
		1148	readdir_r (dirp, &u->d, &entp);
		1149
		1150	if (!entp)
		1151	break;
		1152
		1153	name = entp->d_name;
		1154
		1155	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1156	{
		1157	int len = strlen (name) + 1;
		1158
		1159	res++;
		1160
		1161	while (memofs + len > memlen)
		1162	{
		1163	memlen *= 2;
		1164	X_LOCK (wrklock);
		1165	req->ptr2 = names = realloc (names, memlen);
		1166	X_UNLOCK (wrklock);
		1167
		1168	if (!names)
		1169	break;
		1170	}
		1171
		1172	memcpy (names + memofs, name, len);
		1173	memofs += len;
		1174	}
		1175	}
		1176
		1177	if (errno)
		1178	res = -1;
		1179
		1180	req->result = res;
		1181	}
		1182
		1183	/*****************************************************************************/
		1184
		1185	X_THREAD_PROC (aio_proc)
		1186	{
		1187	{//D
258	aio_req req;	1188	aio_req req;
		1189	struct timespec ts;
		1190	worker *self = (worker *)thr_arg;
259		1191
260	/* then loop */	1192	/* try to distribute timeouts somewhat randomly */
261	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	1193	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
		1194
		1195	for (;;)
262	{	1196	{
		1197	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1198
		1199	X_LOCK (reqlock);
		1200
		1201	for (;;)
		1202	{
		1203	self->req = req = reqq_shift (&req_queue);
		1204
		1205	if (req)
		1206	break;
		1207
		1208	++idle;
		1209
		1210	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
		1211	== ETIMEDOUT)
		1212	{
		1213	if (idle > max_idle)
		1214	{
		1215	--idle;
		1216	X_UNLOCK (reqlock);
		1217	X_LOCK (wrklock);
		1218	--started;
		1219	X_UNLOCK (wrklock);
		1220	goto quit;
		1221	}
		1222
		1223	/* we are allowed to idle, so do so without any timeout */
		1224	X_COND_WAIT (reqwait, reqlock);
		1225	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1226	}
		1227
		1228	--idle;
		1229	}
		1230
		1231	--nready;
		1232
		1233	X_UNLOCK (reqlock);
		1234
263	errno = 0; /* strictly unnecessary */	1235	errno = 0; /* strictly unnecessary */
264		1236
		1237	if (!(req->flags & FLAG_CANCELLED))
265	switch (req->type)	1238	switch (req->type)
		1239	{
		1240	case REQ_READ: req->result = req->offs >= 0
		1241	? pread (req->int1, req->ptr1, req->size, req->offs)
		1242	: read (req->int1, req->ptr1, req->size); break;
		1243	case REQ_WRITE: req->result = req->offs >= 0
		1244	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1245	: write (req->int1, req->ptr1, req->size); break;
		1246
		1247	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1248	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1249
		1250	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1251	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1252	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1253
		1254	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1255	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1256	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1257	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1258	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1259	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1260
		1261	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1262	case REQ_CLOSE: req->result = close (req->int1); break;
		1263	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1264	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1265	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1266	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1267	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1268	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1269	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1270	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1271
		1272	case REQ_SYNC: req->result = 0; sync (); break;
		1273	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1274	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1275
		1276	case REQ_READDIR: scandir_ (req, self); break;
		1277
		1278	case REQ_BUSY:
		1279	#ifdef _WIN32
		1280	Sleep (req->nv1 * 1000.);
		1281	#else
		1282	{
		1283	struct timeval tv;
		1284
		1285	tv.tv_sec = req->nv1;
		1286	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1287
		1288	req->result = select (0, 0, 0, 0, &tv);
		1289	}
		1290	#endif
		1291	break;
		1292
		1293	case REQ_UTIME:
		1294	case REQ_FUTIME:
		1295	{
		1296	struct timeval tv[2];
		1297	struct timeval *times;
		1298
		1299	if (req->nv1 != -1. || req->nv2 != -1.)
		1300	{
		1301	tv[0].tv_sec = req->nv1;
		1302	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1303	tv[1].tv_sec = req->nv2;
		1304	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1305
		1306	times = tv;
		1307	}
		1308	else
		1309	times = 0;
		1310
		1311
		1312	req->result = req->type == REQ_FUTIME
		1313	? futimes (req->int1, times)
		1314	: utimes (req->ptr1, times);
		1315	}
		1316
		1317	case REQ_GROUP:
		1318	case REQ_NOP:
		1319	break;
		1320
		1321	case REQ_QUIT:
		1322	goto quit;
		1323
		1324	default:
		1325	req->result = -1;
		1326	break;
		1327	}
		1328
		1329	req->errorno = errno;
		1330
		1331	X_LOCK (reslock);
		1332
		1333	++npending;
		1334
		1335	if (!reqq_push (&res_queue, req))
266	{	1336	{
267	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	1337	/* write a dummy byte to the pipe so fh becomes ready */
268	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	1338	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
269	#if SYS_readahead	1339
270	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1340	/* optionally signal the main thread asynchronously */
		1341	if (main_sig)
		1342	pthread_kill (main_tid, main_sig);
		1343	}
		1344
		1345	self->req = 0;
		1346	worker_clear (self);
		1347
		1348	X_UNLOCK (reslock);
		1349	}
		1350
		1351	quit:
		1352	X_LOCK (wrklock);
		1353	worker_free (self);
		1354	X_UNLOCK (wrklock);
		1355
		1356	return 0;
		1357	}//D
		1358	}
		1359
		1360	/*****************************************************************************/
		1361
		1362	static void atfork_prepare (void)
		1363	{
		1364	X_LOCK (wrklock);
		1365	X_LOCK (reqlock);
		1366	X_LOCK (reslock);
		1367	#if !HAVE_PREADWRITE
		1368	X_LOCK (preadwritelock);
		1369	#endif
		1370	#if !HAVE_READDIR_R
		1371	X_LOCK (readdirlock);
		1372	#endif
		1373	}
		1374
		1375	static void atfork_parent (void)
		1376	{
		1377	#if !HAVE_READDIR_R
		1378	X_UNLOCK (readdirlock);
		1379	#endif
		1380	#if !HAVE_PREADWRITE
		1381	X_UNLOCK (preadwritelock);
		1382	#endif
		1383	X_UNLOCK (reslock);
		1384	X_UNLOCK (reqlock);
		1385	X_UNLOCK (wrklock);
		1386	}
		1387
		1388	static void atfork_child (void)
		1389	{
		1390	aio_req prv;
		1391
		1392	while (prv = reqq_shift (&req_queue))
		1393	req_destroy (prv);
		1394
		1395	while (prv = reqq_shift (&res_queue))
		1396	req_destroy (prv);
		1397
		1398	while (wrk_first.next != &wrk_first)
		1399	{
		1400	worker *wrk = wrk_first.next;
		1401
		1402	if (wrk->req)
		1403	req_destroy (wrk->req);
		1404
		1405	worker_clear (wrk);
		1406	worker_free (wrk);
		1407	}
		1408
		1409	started = 0;
		1410	idle = 0;
		1411	nreqs = 0;
		1412	nready = 0;
		1413	npending = 0;
		1414
		1415	create_respipe ();
		1416
		1417	atfork_parent ();
		1418	}
		1419
		1420	#define dREQ \
		1421	aio_req req; \
		1422	int req_pri = next_pri; \
		1423	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1424	\
		1425	if (SvOK (callback) && !SvROK (callback)) \
		1426	croak ("callback must be undef or of reference type"); \
		1427	\
		1428	Newz (0, req, 1, aio_cb); \
		1429	if (!req) \
		1430	croak ("out of memory during aio_req allocation"); \
		1431	\
		1432	req->callback = newSVsv (callback); \
		1433	req->pri = req_pri
		1434
		1435	#define REQ_SEND \
		1436	req_send (req); \
		1437	\
		1438	if (GIMME_V != G_VOID) \
		1439	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1440
		1441	MODULE = IO::AIO PACKAGE = IO::AIO
		1442
		1443	PROTOTYPES: ENABLE
		1444
		1445	BOOT:
		1446	{
		1447	stash = gv_stashpv ("IO::AIO", 1);
		1448
		1449	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1450	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1451	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1452	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1453	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1454	#ifdef _WIN32
		1455	X_MUTEX_CHECK (wrklock);
		1456	X_MUTEX_CHECK (reslock);
		1457	X_MUTEX_CHECK (reqlock);
		1458	X_MUTEX_CHECK (reqwait);
		1459	X_MUTEX_CHECK (preadwritelock);
		1460	X_MUTEX_CHECK (readdirlock);
		1461
		1462	X_COND_CHECK (reqwait);
271	#else	1463	#else
272	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;	1464	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1465	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
273	#endif	1466	#endif
274		1467
275	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1468	create_respipe ();
276	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278		1469
279	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1470	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
280	case REQ_CLOSE: req->result = close (req->fd); break;
281	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283	case REQ_FSYNC: req->result = fsync (req->fd); break;
284	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
285
286	case REQ_QUIT:
287	write (respipe[1], (void *)&req, sizeof (req));
288	return 0;
289
290	default:
291	req->result = ENOSYS;
292	break;
293	}
294
295	req->errorno = errno;
296	write (respipe[1], (void *)&req, sizeof (req));
297	}
298
299	return 0;
300	}	1471	}
301		1472
302	MODULE = IO::AIO PACKAGE = IO::AIO
303
304	BOOT:
305	{
306	if (pipe (reqpipe) || pipe (respipe))
307	croak ("unable to initialize request or result pipe");
308
309	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
310	croak ("cannot set result pipe to nonblocking mode");
311
312	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
313	croak ("cannot set result pipe to nonblocking mode");
314	}
315
316	void	1473	void
317	min_parallel(nthreads)	1474	max_poll_reqs (int nreqs)
318	int nthreads
319	PROTOTYPE: $	1475	PROTOTYPE: $
320	CODE:	1476	CODE:
321	while (nthreads > started)	1477	max_poll_reqs = nreqs;
322	start_thread ();
323		1478
324	void	1479	void
325	max_parallel(nthreads)	1480	max_poll_time (double nseconds)
326	int nthreads
327	PROTOTYPE: $	1481	PROTOTYPE: $
328	CODE:	1482	CODE:
329	{	1483	max_poll_time = nseconds * AIO_TICKS;
330	int cur = started;
331	while (cur > nthreads)
332	{
333	end_thread ();
334	cur--;
335	}
336		1484
337	while (started > nthreads)
338	{
339	poll_wait ();
340	poll_cb (aTHX);
341	}
342	}
343
344	void	1485	void
345	aio_open(pathname,flags,mode,callback)	1486	min_parallel (int nthreads)
346	SV * pathname	1487	PROTOTYPE: $
347	int flags	1488
348	int mode	1489	void
349	SV * callback	1490	max_parallel (int nthreads)
		1491	PROTOTYPE: $
		1492
		1493	void
		1494	max_idle (int nthreads)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	set_max_idle (nthreads);
		1498
		1499	int
		1500	max_outstanding (int maxreqs)
		1501	PROTOTYPE: $
		1502	CODE:
		1503	RETVAL = max_outstanding;
		1504	max_outstanding = maxreqs;
		1505	OUTPUT:
		1506	RETVAL
		1507
		1508	void
		1509	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
350	PROTOTYPE: $$$$	1510	PROTOTYPE: $$$;$
351	CODE:	1511	PPCODE:
352	{	1512	{
353	aio_req req;	1513	dREQ;
354
355	Newz (0, req, 1, aio_cb);
356
357	if (!req)
358	croak ("out of memory during aio_req allocation");
359		1514
360	req->type = REQ_OPEN;	1515	req->type = REQ_OPEN;
361	req->data = newSVsv (pathname);	1516	req->sv1 = newSVsv (pathname);
362	req->dataptr = SvPV_nolen (req->data);	1517	req->ptr1 = SvPVbyte_nolen (req->sv1);
363	req->fd = flags;	1518	req->int1 = flags;
364	req->mode = mode;	1519	req->mode = mode;
365	req->callback = SvREFCNT_inc (callback);
366		1520
367	send_req (req);	1521	REQ_SEND;
368	}	1522	}
369		1523
370	void	1524	void
371	aio_close(fh,callback)	1525	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
372	InputStream fh
373	SV * callback
374	PROTOTYPE: $$	1526	PROTOTYPE: $;$
375	ALIAS:	1527	ALIAS:
376	aio_close = REQ_CLOSE
377	aio_fsync = REQ_FSYNC	1528	aio_fsync = REQ_FSYNC
378	aio_fdatasync = REQ_FDATASYNC	1529	aio_fdatasync = REQ_FDATASYNC
379	CODE:	1530	PPCODE:
380	{	1531	{
381	aio_req req;	1532	dREQ;
382
383	Newz (0, req, 1, aio_cb);
384
385	if (!req)
386	croak ("out of memory during aio_req allocation");
387		1533
388	req->type = ix;	1534	req->type = ix;
		1535	req->sv1 = newSVsv (fh);
389	req->fd = PerlIO_fileno (fh);	1536	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
390	req->callback = SvREFCNT_inc (callback);
391		1537
392	send_req (req);	1538	REQ_SEND (req);
393	}	1539	}
394		1540
395	void	1541	int
396	aio_read(fh,offset,length,data,dataoffset,callback)	1542	_dup (int fd)
397	InputStream fh
398	UV offset
399	IV length
400	SV * data
401	IV dataoffset
402	SV * callback
403	PROTOTYPE: $$$$$$	1543	PROTOTYPE: $
404	CODE:	1544	CODE:
405	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);	1545	RETVAL = dup (fd);
		1546	OUTPUT:
		1547	RETVAL
406		1548
407	void	1549	void
408	aio_write(fh,offset,length,data,dataoffset,callback)	1550	_aio_close (int fd, SV *callback=&PL_sv_undef)
409	OutputStream fh	1551	PROTOTYPE: $;$
410	UV offset	1552	PPCODE:
411	IV length	1553	{
412	SV * data	1554	dREQ;
413	IV dataoffset	1555
414	SV * callback	1556	req->type = REQ_CLOSE;
		1557	req->int1 = fd;
		1558
		1559	REQ_SEND (req);
		1560	}
		1561
		1562	void
		1563	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1564	ALIAS:
		1565	aio_read = REQ_READ
		1566	aio_write = REQ_WRITE
415	PROTOTYPE: $$$$$$	1567	PROTOTYPE: $$$$$;$
416	CODE:	1568	PPCODE:
417	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419	void
420	aio_readahead(fh,offset,length,callback)
421	InputStream fh
422	UV offset
423	IV length
424	SV * callback
425	PROTOTYPE: $$$$
426	CODE:
427	{	1569	{
428	aio_req req;	1570	STRLEN svlen;
		1571	char *svptr = SvPVbyte (data, svlen);
		1572	UV len = SvUV (length);
429		1573
		1574	SvUPGRADE (data, SVt_PV);
		1575	SvPOK_on (data);
		1576
		1577	if (dataoffset < 0)
		1578	dataoffset += svlen;
		1579
		1580	if (dataoffset < 0 || dataoffset > svlen)
		1581	croak ("dataoffset outside of data scalar");
		1582
		1583	if (ix == REQ_WRITE)
		1584	{
		1585	/* write: check length and adjust. */
		1586	if (!SvOK (length) || len + dataoffset > svlen)
		1587	len = svlen - dataoffset;
		1588	}
		1589	else
		1590	{
		1591	/* read: grow scalar as necessary */
		1592	svptr = SvGROW (data, len + dataoffset + 1);
		1593	}
		1594
430	if (length < 0)	1595	if (len < 0)
431	croak ("length must not be negative");	1596	croak ("length must not be negative");
432		1597
433	Newz (0, req, 1, aio_cb);	1598	{
		1599	dREQ;
434		1600
435	if (!req)	1601	req->type = ix;
436	croak ("out of memory during aio_req allocation");	1602	req->sv1 = newSVsv (fh);
		1603	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		1604	: IoOFP (sv_2io (fh)));
		1605	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1606	req->size = len;
		1607	req->sv2 = SvREFCNT_inc (data);
		1608	req->ptr1 = (char *)svptr + dataoffset;
		1609	req->stroffset = dataoffset;
		1610
		1611	if (!SvREADONLY (data))
		1612	{
		1613	SvREADONLY_on (data);
		1614	req->flags |= FLAG_SV2_RO_OFF;
		1615	}
		1616
		1617	REQ_SEND;
		1618	}
		1619	}
		1620
		1621	void
		1622	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1623	PROTOTYPE: $$;$
		1624	PPCODE:
		1625	{
		1626	SV *data;
		1627	dREQ;
		1628
		1629	data = newSV (NAME_MAX);
		1630	SvPOK_on (data);
		1631
		1632	req->type = REQ_READLINK;
		1633	req->sv1 = newSVsv (path);
		1634	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1635	req->sv2 = data;
		1636	req->ptr1 = SvPVbyte_nolen (data);
		1637
		1638	REQ_SEND;
		1639	}
		1640
		1641	void
		1642	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		1643	PROTOTYPE: $$$$;$
		1644	PPCODE:
		1645	{
		1646	dREQ;
		1647
		1648	req->type = REQ_SENDFILE;
		1649	req->sv1 = newSVsv (out_fh);
		1650	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1651	req->sv2 = newSVsv (in_fh);
		1652	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1653	req->offs = SvVAL64 (in_offset);
		1654	req->size = length;
		1655
		1656	REQ_SEND;
		1657	}
		1658
		1659	void
		1660	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		1661	PROTOTYPE: $$$;$
		1662	PPCODE:
		1663	{
		1664	dREQ;
437		1665
438	req->type = REQ_READAHEAD;	1666	req->type = REQ_READAHEAD;
		1667	req->sv1 = newSVsv (fh);
439	req->fd = PerlIO_fileno (fh);	1668	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
440	req->offset = offset;	1669	req->offs = SvVAL64 (offset);
441	req->length = length;	1670	req->size = length;
442	req->callback = SvREFCNT_inc (callback);
443		1671
444	send_req (req);	1672	REQ_SEND;
445	}	1673	}
446		1674
447	void	1675	void
448	aio_stat(fh_or_path,callback)	1676	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
449	SV * fh_or_path
450	SV * callback
451	PROTOTYPE: $$
452	ALIAS:	1677	ALIAS:
		1678	aio_stat = REQ_STAT
453	aio_lstat = 1	1679	aio_lstat = REQ_LSTAT
454	CODE:	1680	PPCODE:
455	{	1681	{
456	aio_req req;	1682	dREQ;
457		1683
458	Newz (0, req, 1, aio_cb);	1684	req->ptr2 = malloc (sizeof (Stat_t));
459
460	if (!req)	1685	if (!req->ptr2)
461	croak ("out of memory during aio_req allocation");	1686	{
462		1687	req_destroy (req);
463	New (0, req->statdata, 1, Stat_t);
464
465	if (!req->statdata)
466	croak ("out of memory during aio_req->statdata allocation");	1688	croak ("out of memory during aio_stat statdata allocation");
		1689	}
		1690
		1691	req->flags |= FLAG_PTR2_FREE;
		1692	req->sv1 = newSVsv (fh_or_path);
467		1693
468	if (SvPOK (fh_or_path))	1694	if (SvPOK (fh_or_path))
469	{	1695	{
470	req->type = ix ? REQ_LSTAT : REQ_STAT;	1696	req->type = ix;
471	req->data = newSVsv (fh_or_path);
472	req->dataptr = SvPV_nolen (req->data);	1697	req->ptr1 = SvPVbyte_nolen (req->sv1);
473	}	1698	}
474	else	1699	else
475	{	1700	{
476	req->type = REQ_FSTAT;	1701	req->type = REQ_FSTAT;
477	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1702	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478	}	1703	}
479		1704
480	req->callback = SvREFCNT_inc (callback);	1705	REQ_SEND;
481
482	send_req (req);
483	}	1706	}
484		1707
485	void	1708	void
486	aio_unlink(pathname,callback)	1709	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
487	SV * pathname	1710	PPCODE:
488	SV * callback	1711	{
		1712	dREQ;
		1713
		1714	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1715	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1716	req->sv1 = newSVsv (fh_or_path);
		1717
		1718	if (SvPOK (fh_or_path))
		1719	{
		1720	req->type = REQ_UTIME;
		1721	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1722	}
		1723	else
		1724	{
		1725	req->type = REQ_FUTIME;
		1726	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1727	}
		1728
		1729	REQ_SEND;
		1730	}
		1731
		1732	void
		1733	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1734	PPCODE:
		1735	{
		1736	dREQ;
		1737
		1738	req->sv1 = newSVsv (fh_or_path);
		1739	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1740
		1741	if (SvPOK (fh_or_path))
		1742	{
		1743	req->type = REQ_TRUNCATE;
		1744	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1745	}
		1746	else
		1747	{
		1748	req->type = REQ_FTRUNCATE;
		1749	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1750	}
		1751
		1752	REQ_SEND;
		1753	}
		1754
		1755	void
		1756	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1757	PPCODE:
		1758	{
		1759	dREQ;
		1760
		1761	req->mode = mode;
		1762	req->sv1 = newSVsv (fh_or_path);
		1763
		1764	if (SvPOK (fh_or_path))
		1765	{
		1766	req->type = REQ_CHMOD;
		1767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1768	}
		1769	else
		1770	{
		1771	req->type = REQ_FCHMOD;
		1772	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1773	}
		1774
		1775	REQ_SEND;
		1776	}
		1777
		1778	void
		1779	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1780	PPCODE:
		1781	{
		1782	dREQ;
		1783
		1784	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1785	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1786	req->sv1 = newSVsv (fh_or_path);
		1787
		1788	if (SvPOK (fh_or_path))
		1789	{
		1790	req->type = REQ_CHOWN;
		1791	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1792	}
		1793	else
		1794	{
		1795	req->type = REQ_FCHOWN;
		1796	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1797	}
		1798
		1799	REQ_SEND;
		1800	}
		1801
		1802	void
		1803	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1804	ALIAS:
		1805	aio_unlink = REQ_UNLINK
		1806	aio_rmdir = REQ_RMDIR
		1807	aio_readdir = REQ_READDIR
		1808	PPCODE:
		1809	{
		1810	dREQ;
		1811
		1812	req->type = ix;
		1813	req->sv1 = newSVsv (pathname);
		1814	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1815
		1816	REQ_SEND;
		1817	}
		1818
		1819	void
		1820	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1821	PPCODE:
		1822	{
		1823	dREQ;
		1824
		1825	req->type = REQ_MKDIR;
		1826	req->sv1 = newSVsv (pathname);
		1827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1828	req->mode = mode;
		1829
		1830	REQ_SEND;
		1831	}
		1832
		1833	void
		1834	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1835	ALIAS:
		1836	aio_link = REQ_LINK
		1837	aio_symlink = REQ_SYMLINK
		1838	aio_rename = REQ_RENAME
		1839	PPCODE:
		1840	{
		1841	dREQ;
		1842
		1843	req->type = ix;
		1844	req->sv2 = newSVsv (oldpath);
		1845	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1846	req->sv1 = newSVsv (newpath);
		1847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1848
		1849	REQ_SEND;
		1850	}
		1851
		1852	void
		1853	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1854	PPCODE:
		1855	{
		1856	dREQ;
		1857
		1858	req->type = REQ_MKNOD;
		1859	req->sv1 = newSVsv (pathname);
		1860	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1861	req->mode = (mode_t)mode;
		1862	req->offs = dev;
		1863
		1864	REQ_SEND;
		1865	}
		1866
		1867	void
		1868	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1869	PPCODE:
		1870	{
		1871	dREQ;
		1872
		1873	req->type = REQ_BUSY;
		1874	req->nv1 = delay < 0. ? 0. : delay;
		1875
		1876	REQ_SEND;
		1877	}
		1878
		1879	void
		1880	aio_group (SV *callback=&PL_sv_undef)
489	PROTOTYPE: $$	1881	PROTOTYPE: ;$
		1882	PPCODE:
		1883	{
		1884	dREQ;
		1885
		1886	req->type = REQ_GROUP;
		1887
		1888	req_send (req);
		1889	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1890	}
		1891
		1892	void
		1893	aio_nop (SV *callback=&PL_sv_undef)
		1894	ALIAS:
		1895	aio_nop = REQ_NOP
		1896	aio_sync = REQ_SYNC
		1897	PPCODE:
		1898	{
		1899	dREQ;
		1900
		1901	req->type = ix;
		1902
		1903	REQ_SEND;
		1904	}
		1905
		1906	int
		1907	aioreq_pri (int pri = 0)
		1908	PROTOTYPE: ;$
490	CODE:	1909	CODE:
491	{	1910	RETVAL = next_pri - PRI_BIAS;
492	aio_req req;	1911	if (items > 0)
493		1912	{
494	Newz (0, req, 1, aio_cb);	1913	if (pri < PRI_MIN) pri = PRI_MIN;
495		1914	if (pri > PRI_MAX) pri = PRI_MAX;
496	if (!req)	1915	next_pri = pri + PRI_BIAS;
497	croak ("out of memory during aio_req allocation");	1916	}
498		1917	OUTPUT:
499	req->type = REQ_UNLINK;	1918	RETVAL
500	req->data = newSVsv (pathname);	1919
501	req->dataptr = SvPV_nolen (req->data);	1920	void
502	req->callback = SvREFCNT_inc (callback);	1921	aioreq_nice (int nice = 0)
503		1922	CODE:
504	send_req (req);	1923	nice = next_pri - nice;
505	}	1924	if (nice < PRI_MIN) nice = PRI_MIN;
		1925	if (nice > PRI_MAX) nice = PRI_MAX;
		1926	next_pri = nice + PRI_BIAS;
		1927
		1928	void
		1929	flush ()
		1930	PROTOTYPE:
		1931	CODE:
		1932	while (nreqs)
		1933	{
		1934	poll_wait ();
		1935	poll_cb ();
		1936	}
		1937
		1938	int
		1939	poll()
		1940	PROTOTYPE:
		1941	CODE:
		1942	poll_wait ();
		1943	RETVAL = poll_cb ();
		1944	OUTPUT:
		1945	RETVAL
506		1946
507	int	1947	int
508	poll_fileno()	1948	poll_fileno()
509	PROTOTYPE:	1949	PROTOTYPE:
510	CODE:	1950	CODE:
511	RETVAL = respipe[0];	1951	RETVAL = respipe [0];
512	OUTPUT:	1952	OUTPUT:
513	RETVAL	1953	RETVAL
514		1954
515	int	1955	int
516	poll_cb(...)	1956	poll_cb(...)
517	PROTOTYPE:	1957	PROTOTYPE:
518	CODE:	1958	CODE:
519	RETVAL = poll_cb (aTHX);	1959	RETVAL = poll_cb ();
520	OUTPUT:	1960	OUTPUT:
521	RETVAL	1961	RETVAL
522		1962
523	void	1963	void
524	poll_wait()	1964	poll_wait()
525	PROTOTYPE:	1965	PROTOTYPE:
526	CODE:	1966	CODE:
527	poll_wait ();	1967	poll_wait ();
		1968
		1969	void
		1970	setsig (int signum = SIGIO)
		1971	PROTOTYPE: ;$
		1972	CODE:
		1973	{
		1974	if (block_sig_level)
		1975	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1976
		1977	X_LOCK (reslock);
		1978	main_tid = pthread_self ();
		1979	main_sig = signum;
		1980	X_UNLOCK (reslock);
		1981
		1982	if (main_sig && npending)
		1983	pthread_kill (main_tid, main_sig);
		1984	}
		1985
		1986	void
		1987	aio_block (SV *cb)
		1988	PROTOTYPE: &
		1989	PPCODE:
		1990	{
		1991	int count;
		1992
		1993	block_sig ();
		1994	PUSHMARK (SP);
		1995	PUTBACK;
		1996	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1997	SPAGAIN;
		1998	unblock_sig ();
		1999
		2000	if (SvTRUE (ERRSV))
		2001	croak (0);
		2002
		2003	XSRETURN (count);
		2004	}
528		2005
529	int	2006	int
530	nreqs()	2007	nreqs()
531	PROTOTYPE:	2008	PROTOTYPE:
532	CODE:	2009	CODE:
533	RETVAL = nreqs;	2010	RETVAL = nreqs;
534	OUTPUT:	2011	OUTPUT:
535	RETVAL	2012	RETVAL
536		2013
		2014	int
		2015	nready()
		2016	PROTOTYPE:
		2017	CODE:
		2018	RETVAL = get_nready ();
		2019	OUTPUT:
		2020	RETVAL
		2021
		2022	int
		2023	npending()
		2024	PROTOTYPE:
		2025	CODE:
		2026	RETVAL = get_npending ();
		2027	OUTPUT:
		2028	RETVAL
		2029
		2030	int
		2031	nthreads()
		2032	PROTOTYPE:
		2033	CODE:
		2034	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		2035	RETVAL = started;
		2036	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		2037	OUTPUT:
		2038	RETVAL
		2039
		2040	PROTOTYPES: DISABLE
		2041
		2042	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2043
		2044	void
		2045	cancel (aio_req_ornot req)
		2046	CODE:
		2047	req_cancel (req);
		2048
		2049	void
		2050	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		2051	CODE:
		2052	SvREFCNT_dec (req->callback);
		2053	req->callback = newSVsv (callback);
		2054
		2055	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2056
		2057	void
		2058	add (aio_req grp, ...)
		2059	PPCODE:
		2060	{
		2061	int i;
		2062	aio_req req;
		2063
		2064	if (main_sig && !block_sig_level)
		2065	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		2066
		2067	if (grp->int1 == 2)
		2068	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2069
		2070	for (i = 1; i < items; ++i )
		2071	{
		2072	if (GIMME_V != G_VOID)
		2073	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2074
		2075	req = SvAIO_REQ (ST (i));
		2076
		2077	if (req)
		2078	{
		2079	++grp->size;
		2080	req->grp = grp;
		2081
		2082	req->grp_prev = 0;
		2083	req->grp_next = grp->grp_first;
		2084
		2085	if (grp->grp_first)
		2086	grp->grp_first->grp_prev = req;
		2087
		2088	grp->grp_first = req;
		2089	}
		2090	}
		2091	}
		2092
		2093	void
		2094	cancel_subs (aio_req_ornot req)
		2095	CODE:
		2096	req_cancel_subs (req);
		2097
		2098	void
		2099	result (aio_req grp, ...)
		2100	CODE:
		2101	{
		2102	int i;
		2103	AV *av;
		2104
		2105	grp->errorno = errno;
		2106
		2107	av = newAV ();
		2108
		2109	for (i = 1; i < items; ++i )
		2110	av_push (av, newSVsv (ST (i)));
		2111
		2112	SvREFCNT_dec (grp->sv1);
		2113	grp->sv1 = (SV *)av;
		2114	}
		2115
		2116	void
		2117	errno (aio_req grp, int errorno = errno)
		2118	CODE:
		2119	grp->errorno = errorno;
		2120
		2121	void
		2122	limit (aio_req grp, int limit)
		2123	CODE:
		2124	grp->int2 = limit;
		2125	aio_grp_feed (grp);
		2126
		2127	void
		2128	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2129	CODE:
		2130	{
		2131	SvREFCNT_dec (grp->sv2);
		2132	grp->sv2 = newSVsv (callback);
		2133
		2134	if (grp->int2 <= 0)
		2135	grp->int2 = 2;
		2136
		2137	aio_grp_feed (grp);
		2138	}
		2139

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