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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 UTC vs.
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC

1	#define _REENTRANT 1	1	#include "xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "autoconf/config.h"
9		10
10	#include <pthread.h>
11
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
13	#include <sys/types.h>	16	#include <sys/types.h>
14	#include <sys/stat.h>	17	#include <sys/stat.h>
15	#include <limits.h>	18	#include <limits.h>
16	#include <unistd.h>	19	#include <unistd.h>
17	#include <fcntl.h>	20	#include <fcntl.h>
…		…
31	# else	34	# else
32	# error sendfile support requested but not available	35	# error sendfile support requested but not available
33	# endif	36	# endif
34	#endif	37	#endif
35		38
36	#if __ia64	39	/* number of seconds after which idle threads exit */
37	# define STACKSIZE 65536	40	#define IDLE_TIMEOUT 10
38	#else	41
39	# define STACKSIZE 8192	42	/* used for struct dirent, AIX doesn't provide it */
		43	#ifndef NAME_MAX
		44	# define NAME_MAX 4096
40	#endif	45	#endif
		46
		47	/* buffer size for various temporary buffers */
		48	#define AIO_BUFSIZE 65536
		49
		50	#define dBUF \
		51	char *aio_buf; \
		52	LOCK (wrklock); \
		53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		54	UNLOCK (wrklock); \
		55	if (!aio_buf) \
		56	return -1;
		57
		58	typedef SV SV8; /* byte-sv, used for argument-checking */
41		59
42	enum {	60	enum {
43	REQ_QUIT,	61	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	62	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,	64	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,	66	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
50	REQ_READDIR,	68	REQ_MKNOD, REQ_READDIR,
51	REQ_SYMLINK,	69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		70	REQ_GROUP, REQ_NOP,
		71	REQ_BUSY,
52	};	72	};
53		73
		74	#define AIO_REQ_KLASS "IO::AIO::REQ"
		75	#define AIO_GRP_KLASS "IO::AIO::GRP"
		76
54	typedef struct aio_cb {	77	typedef struct aio_cb
		78	{
55	struct aio_cb *volatile next;	79	struct aio_cb *volatile next;
56		80
		81	SV *callback, *fh;
		82	SV *sv1, *sv2;
		83	void *ptr1, *ptr2;
		84	off_t offs;
		85	size_t size;
		86	ssize_t result;
		87
		88	STRLEN stroffset;
57	int type;	89	int type;
58		90	int int1, int2;
59	/* should receive a cleanup, with unions */	91	int errorno;
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */	92	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		93
71	Stat_t *statdata;	94	unsigned char flags;
		95	unsigned char pri;
		96
		97	SV *self; /* the perl counterpart of this request, if any */
		98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72	} aio_cb;	99	} aio_cb;
73		100
		101	enum {
		102	FLAG_CANCELLED = 0x01, /* request was cancelled */
		103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		105	};
		106
74	typedef aio_cb *aio_req;	107	typedef aio_cb *aio_req;
		108	typedef aio_cb *aio_req_ornot;
75		109
		110	enum {
		111	PRI_MIN = -4,
		112	PRI_MAX = 4,
		113
		114	DEFAULT_PRI = 0,
		115	PRI_BIAS = -PRI_MIN,
		116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		117	};
		118
		119	#define AIO_TICKS ((1000000 + 1023) >> 10)
		120
		121	static unsigned int max_poll_time = 0;
		122	static unsigned int max_poll_reqs = 0;
		123
		124	/* calculcate time difference in ~1/AIO_TICKS of a second */
		125	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		126	{
		127	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		128	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		129	}
		130
		131	static thread_t main_tid;
		132	static int main_sig;
		133	static int block_sig_level;
		134
		135	void block_sig ()
		136	{
		137	sigset_t ss;
		138
		139	if (block_sig_level++)
		140	return;
		141
		142	if (!main_sig)
		143	return;
		144
		145	sigemptyset (&ss);
		146	sigaddset (&ss, main_sig);
		147	pthread_sigmask (SIG_BLOCK, &ss, 0);
		148	}
		149
		150	void unblock_sig ()
		151	{
		152	sigset_t ss;
		153
		154	if (--block_sig_level)
		155	return;
		156
		157	if (!main_sig)
		158	return;
		159
		160	sigemptyset (&ss);
		161	sigaddset (&ss, main_sig);
		162	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		163	}
		164
		165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		166
76	static int started, wanted;	167	static unsigned int started, idle, wanted;
77	static volatile int nreqs;	168
78	static int max_outstanding = 1<<30;	169	/* worker threads management */
		170	static mutex_t wrklock = MUTEX_INIT;
		171
		172	typedef struct worker {
		173	/* locked by wrklock */
		174	struct worker *prev, *next;
		175
		176	thread_t tid;
		177
		178	/* locked by reslock, reqlock or wrklock */
		179	aio_req req; /* currently processed request */
		180	void *dbuf;
		181	DIR *dirp;
		182	} worker;
		183
		184	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		185
		186	static void worker_clear (worker *wrk)
		187	{
		188	if (wrk->dirp)
		189	{
		190	closedir (wrk->dirp);
		191	wrk->dirp = 0;
		192	}
		193
		194	if (wrk->dbuf)
		195	{
		196	free (wrk->dbuf);
		197	wrk->dbuf = 0;
		198	}
		199	}
		200
		201	static void worker_free (worker *wrk)
		202	{
		203	wrk->next->prev = wrk->prev;
		204	wrk->prev->next = wrk->next;
		205
		206	free (wrk);
		207	}
		208
		209	static volatile unsigned int nreqs, nready, npending;
		210	static volatile unsigned int max_idle = 4;
		211	static volatile unsigned int max_outstanding = 0xffffffff;
79	static int respipe [2];	212	static int respipe [2];
80		213
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	214	static mutex_t reslock = MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	215	static mutex_t reqlock = MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	216	static cond_t reqwait = COND_INIT;
84		217
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	218	#if WORDACCESS_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		219
		220	static unsigned int get_nready ()
		221	{
		222	unsigned int retval;
		223
		224	LOCK (reqlock);
		225	retval = nready;
		226	UNLOCK (reqlock);
		227
		228	return retval;
		229	}
		230
		231	static unsigned int get_npending ()
		232	{
		233	unsigned int retval;
		234
		235	LOCK (reslock);
		236	retval = npending;
		237	UNLOCK (reslock);
		238
		239	return retval;
		240	}
		241
		242	static unsigned int get_nthreads ()
		243	{
		244	unsigned int retval;
		245
		246	LOCK (wrklock);
		247	retval = started;
		248	UNLOCK (wrklock);
		249
		250	return retval;
		251	}
		252
		253	#else
		254
		255	# define get_nready() nready
		256	# define get_npending() npending
		257	# define get_nthreads() started
		258
		259	#endif
		260
		261	/*
		262	* a somewhat faster data structure might be nice, but
		263	* with 8 priorities this actually needs <20 insns
		264	* per shift, the most expensive operation.
		265	*/
		266	typedef struct {
		267	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		268	int size;
		269	} reqq;
		270
		271	static reqq req_queue;
		272	static reqq res_queue;
		273
		274	int reqq_push (reqq *q, aio_req req)
		275	{
		276	int pri = req->pri;
		277	req->next = 0;
		278
		279	if (q->qe[pri])
		280	{
		281	q->qe[pri]->next = req;
		282	q->qe[pri] = req;
		283	}
		284	else
		285	q->qe[pri] = q->qs[pri] = req;
		286
		287	return q->size++;
		288	}
		289
		290	aio_req reqq_shift (reqq *q)
		291	{
		292	int pri;
		293
		294	if (!q->size)
		295	return 0;
		296
		297	--q->size;
		298
		299	for (pri = NUM_PRI; pri--; )
		300	{
		301	aio_req req = q->qs[pri];
		302
		303	if (req)
		304	{
		305	if (!(q->qs[pri] = req->next))
		306	q->qe[pri] = 0;
		307
		308	return req;
		309	}
		310	}
		311
		312	abort ();
		313	}
		314
		315	static int poll_cb ();
		316	static int req_invoke (aio_req req);
		317	static void req_free (aio_req req);
		318	static void req_cancel (aio_req req);
		319
		320	/* must be called at most once */
		321	static SV *req_sv (aio_req req, const char *klass)
		322	{
		323	if (!req->self)
		324	{
		325	req->self = (SV *)newHV ();
		326	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		327	}
		328
		329	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		330	}
		331
		332	static aio_req SvAIO_REQ (SV *sv)
		333	{
		334	MAGIC *mg;
		335
		336	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		337	croak ("object of class " AIO_REQ_KLASS " expected");
		338
		339	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		340
		341	return mg ? (aio_req)mg->mg_ptr : 0;
		342	}
		343
		344	static void aio_grp_feed (aio_req grp)
		345	{
		346	block_sig ();
		347
		348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		349	{
		350	int old_len = grp->size;
		351
		352	if (grp->sv2 && SvOK (grp->sv2))
		353	{
		354	dSP;
		355
		356	ENTER;
		357	SAVETMPS;
		358	PUSHMARK (SP);
		359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		360	PUTBACK;
		361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		362	SPAGAIN;
		363	FREETMPS;
		364	LEAVE;
		365	}
		366
		367	/* stop if no progress has been made */
		368	if (old_len == grp->size)
		369	{
		370	SvREFCNT_dec (grp->sv2);
		371	grp->sv2 = 0;
		372	break;
		373	}
		374	}
		375
		376	unblock_sig ();
		377	}
		378
		379	static void aio_grp_dec (aio_req grp)
		380	{
		381	--grp->size;
		382
		383	/* call feeder, if applicable */
		384	aio_grp_feed (grp);
		385
		386	/* finish, if done */
		387	if (!grp->size && grp->int1)
		388	{
		389	block_sig ();
		390
		391	if (!req_invoke (grp))
		392	{
		393	req_free (grp);
		394	unblock_sig ();
		395	croak (0);
		396	}
		397
		398	req_free (grp);
		399	unblock_sig ();
		400	}
		401	}
		402
		403	static int req_invoke (aio_req req)
		404	{
		405	dSP;
		406
		407	if (req->flags & FLAG_SV1_RO_OFF)
		408	SvREADONLY_off (req->sv1);
		409
		410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		411	{
		412	ENTER;
		413	SAVETMPS;
		414	PUSHMARK (SP);
		415	EXTEND (SP, 1);
		416
		417	switch (req->type)
		418	{
		419	case REQ_READDIR:
		420	{
		421	SV *rv = &PL_sv_undef;
		422
		423	if (req->result >= 0)
		424	{
		425	int i;
		426	char *buf = req->ptr2;
		427	AV *av = newAV ();
		428
		429	av_extend (av, req->result - 1);
		430
		431	for (i = 0; i < req->result; ++i)
		432	{
		433	SV *sv = newSVpv (buf, 0);
		434
		435	av_store (av, i, sv);
		436	buf += SvCUR (sv) + 1;
		437	}
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)av));
		440	}
		441
		442	PUSHs (rv);
		443	}
		444	break;
		445
		446	case REQ_OPEN:
		447	{
		448	/* convert fd to fh */
		449	SV *fh;
		450
		451	PUSHs (sv_2mortal (newSViv (req->result)));
		452	PUTBACK;
		453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		454	SPAGAIN;
		455
		456	fh = POPs;
		457	PUSHMARK (SP);
		458	XPUSHs (fh);
		459	}
		460	break;
		461
		462	case REQ_GROUP:
		463	req->int1 = 2; /* mark group as finished */
		464
		465	if (req->sv1)
		466	{
		467	int i;
		468	AV *av = (AV *)req->sv1;
		469
		470	EXTEND (SP, AvFILL (av) + 1);
		471	for (i = 0; i <= AvFILL (av); ++i)
		472	PUSHs (*av_fetch (av, i, 0));
		473	}
		474	break;
		475
		476	case REQ_NOP:
		477	case REQ_BUSY:
		478	break;
		479
		480	case REQ_READLINK:
		481	if (req->result > 0)
		482	{
		483	SvCUR_set (req->sv1, req->result);
		484	*SvEND (req->sv1) = 0;
		485	PUSHs (req->sv1);
		486	}
		487	break;
		488
		489	case REQ_STAT:
		490	case REQ_LSTAT:
		491	case REQ_FSTAT:
		492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		493	PL_laststatval = req->result;
		494	PL_statcache = *(Stat_t *)(req->ptr2);
		495	PUSHs (sv_2mortal (newSViv (req->result)));
		496	break;
		497
		498	case REQ_READ:
		499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		500	*SvEND (req->sv1) = 0;
		501	PUSHs (sv_2mortal (newSViv (req->result)));
		502	break;
		503
		504	default:
		505	PUSHs (sv_2mortal (newSViv (req->result)));
		506	break;
		507	}
		508
		509	errno = req->errorno;
		510
		511	PUTBACK;
		512	call_sv (req->callback, G_VOID | G_EVAL);
		513	SPAGAIN;
		514
		515	FREETMPS;
		516	LEAVE;
		517	}
		518
		519	if (req->grp)
		520	{
		521	aio_req grp = req->grp;
		522
		523	/* unlink request */
		524	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		525	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		526
		527	if (grp->grp_first == req)
		528	grp->grp_first = req->grp_next;
		529
		530	aio_grp_dec (grp);
		531	}
		532
		533	return !SvTRUE (ERRSV);
		534	}
		535
88	static void free_req (aio_req req)	536	static void req_free (aio_req req)
89	{	537	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92
93	if (req->fh)	538	if (req->self)
		539	{
		540	sv_unmagic (req->self, PERL_MAGIC_ext);
		541	SvREFCNT_dec (req->self);
		542	}
		543
94	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
95		545	SvREFCNT_dec (req->sv1);
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
104		548
105	if (req->type == REQ_READDIR && req->result >= 0)	549	if (req->flags & FLAG_PTR2_FREE)
106	free (req->data2ptr);	550	free (req->ptr2);
107		551
108	Safefree (req);	552	Safefree (req);
109	}	553	}
110		554
111	static void	555	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	556	{
114	if (nreqs && !ress)	557	aio_req sub;
		558
		559	if (grp->type != REQ_GROUP)
		560	return;
		561
		562	SvREFCNT_dec (grp->sv2);
		563	grp->sv2 = 0;
		564
		565	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		566	req_cancel (sub);
		567	}
		568
		569	static void req_cancel (aio_req req)
		570	{
		571	req->flags |= FLAG_CANCELLED;
		572
		573	req_cancel_subs (req);
		574	}
		575
		576	static void *aio_proc(void *arg);
		577
		578	static void start_thread (void)
		579	{
		580	worker *wrk = calloc (1, sizeof (worker));
		581
		582	if (!wrk)
		583	croak ("unable to allocate worker thread data");
		584
		585	LOCK (wrklock);
		586
		587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
115	{	588	{
		589	wrk->prev = &wrk_first;
		590	wrk->next = wrk_first.next;
		591	wrk_first.next->prev = wrk;
		592	wrk_first.next = wrk;
		593	++started;
		594	}
		595	else
		596	free (wrk);
		597
		598	UNLOCK (wrklock);
		599	}
		600
		601	static void maybe_start_thread ()
		602	{
		603	if (get_nthreads () >= wanted)
		604	return;
		605
		606	/* todo: maybe use idle here, but might be less exact */
		607	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		608	return;
		609
		610	start_thread ();
		611	}
		612
		613	static void req_send (aio_req req)
		614	{
		615	block_sig ();
		616
		617	++nreqs;
		618
		619	LOCK (reqlock);
		620	++nready;
		621	reqq_push (&req_queue, req);
		622	COND_SIGNAL (reqwait);
		623	UNLOCK (reqlock);
		624
		625	unblock_sig ();
		626
		627	maybe_start_thread ();
		628	}
		629
		630	static void end_thread (void)
		631	{
		632	aio_req req;
		633
		634	Newz (0, req, 1, aio_cb);
		635
		636	req->type = REQ_QUIT;
		637	req->pri = PRI_MAX + PRI_BIAS;
		638
		639	LOCK (reqlock);
		640	reqq_push (&req_queue, req);
		641	COND_SIGNAL (reqwait);
		642	UNLOCK (reqlock);
		643
		644	LOCK (wrklock);
		645	--started;
		646	UNLOCK (wrklock);
		647	}
		648
		649	static void set_max_idle (int nthreads)
		650	{
		651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		652	max_idle = nthreads <= 0 ? 1 : nthreads;
		653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		654	}
		655
		656	static void min_parallel (int nthreads)
		657	{
		658	if (wanted < nthreads)
		659	wanted = nthreads;
		660	}
		661
		662	static void max_parallel (int nthreads)
		663	{
		664	if (wanted > nthreads)
		665	wanted = nthreads;
		666
		667	while (started > wanted)
		668	end_thread ();
		669	}
		670
		671	static void poll_wait ()
		672	{
116	fd_set rfd;	673	fd_set rfd;
		674
		675	while (nreqs)
		676	{
		677	int size;
		678	if (WORDACCESS_UNSAFE) LOCK (reslock);
		679	size = res_queue.size;
		680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		681
		682	if (size)
		683	return;
		684
		685	maybe_start_thread ();
		686
117	FD_ZERO(&rfd);	687	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	688	FD_SET(respipe [0], &rfd);
119		689
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	690	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	691	}
122	}	692	}
123		693
124	static int	694	static int poll_cb ()
125	poll_cb ()
126	{	695	{
127	dSP;	696	dSP;
128	int count = 0;	697	int count = 0;
		698	int maxreqs = max_poll_reqs;
129	int do_croak = 0;	699	int do_croak = 0;
		700	struct timeval tv_start, tv_now;
130	aio_req req;	701	aio_req req;
		702
		703	if (max_poll_time)
		704	gettimeofday (&tv_start, 0);
		705
		706	block_sig ();
131		707
132	for (;;)	708	for (;;)
133	{	709	{
134	pthread_mutex_lock (&reslock);	710	for (;;)
135	req = ress;
136
137	if (req)
138	{	711	{
139	ress = req->next;	712	maybe_start_thread ();
140		713
		714	LOCK (reslock);
		715	req = reqq_shift (&res_queue);
		716
141	if (!ress)	717	if (req)
142	{	718	{
		719	--npending;
		720
		721	if (!res_queue.size)
		722	{
143	/* read any signals sent by the worker threads */	723	/* read any signals sent by the worker threads */
144	char buf [32];	724	char buf [4];
145	while (read (respipe [0], buf, 32) == 32)	725	while (read (respipe [0], buf, 4) == 4)
		726	;
146	;	727	}
147
148	rese = 0;
149	}	728	}
150	}
151		729
152	pthread_mutex_unlock (&reslock);	730	UNLOCK (reslock);
153		731
154	if (!req)	732	if (!req)
155	break;	733	break;
156		734
157	nreqs--;	735	--nreqs;
158		736
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)	737	if (req->type == REQ_GROUP && req->size)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{	738	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	739	req->int1 = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	740	continue;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}	741	}
205	else	742	else
206	{	743	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));	744	if (!req_invoke (req))
208
209	if (req->type == REQ_OPEN)
210	{	745	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);	746	req_free (req);
		747	unblock_sig ();
234	croak (0);	748	croak (0);
235	}	749	}
		750
		751	count++;
236	}	752	}
237		753
238	LEAVE;	754	req_free (req);
239		755
240	errno = errorno;	756	if (maxreqs && !--maxreqs)
241	count++;	757	break;
		758
		759	if (max_poll_time)
		760	{
		761	gettimeofday (&tv_now, 0);
		762
		763	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		764	break;
		765	}
242	}	766	}
243		767
244	free_req (req);	768	if (nreqs <= max_outstanding)
		769	break;
		770
		771	poll_wait ();
		772
		773	++maxreqs;
245	}	774	}
246		775
		776	unblock_sig ();
247	return count;	777	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}	778	}
342		779
343	static void create_pipe ()	780	static void create_pipe ()
344	{	781	{
345	if (pipe (respipe))	782	if (pipe (respipe))
…		…
362	/*	799	/*
363	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,	801	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.	802	* but that's your problem, not mine.
366	*/	803	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
368		805
369	static ssize_t	806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{	807	{
372	ssize_t res;	808	ssize_t res;
373	off_t ooffset;	809	off_t ooffset;
374		810
375	pthread_mutex_lock (&preadwritelock);	811	LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	812	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	813	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	814	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	815	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	816	UNLOCK (preadwritelock);
381		817
382	return res;	818	return res;
383	}	819	}
384		820
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)	821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
387	{	822	{
388	ssize_t res;	823	ssize_t res;
389	off_t ooffset;	824	off_t ooffset;
390		825
391	pthread_mutex_lock (&preadwritelock);	826	LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	827	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	829	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	830	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	831	UNLOCK (preadwritelock);
397		832
398	return res;	833	return res;
399	}	834	}
400	#endif	835	#endif
401		836
402	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	838	# define fdatasync fsync
404	#endif	839	#endif
405		840
406	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		843
409	static ssize_t	844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
410	readahead (int fd, off_t offset, size_t count)
411	{	845	{
412	char readahead_buf[4096];	846	dBUF;
413		847
414	while (count > 0)	848	while (count > 0)
415	{	849	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
417		851
418	pread (fd, readahead_buf, len, offset);	852	pread (fd, aio_buf, len, offset);
419	offset += len;	853	offset += len;
420	count -= len;	854	count -= len;
421	}	855	}
422		856
423	errno = 0;	857	errno = 0;
424	}	858	}
		859
425	#endif	860	#endif
426		861
427	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
429		864
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
431		866
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	868	{
435	struct dirent *e;	869	struct dirent *e;
436	int errorno;	870	int errorno;
437		871
438	pthread_mutex_lock (&readdirlock);	872	LOCK (readdirlock);
439		873
440	e = readdir (dirp);	874	e = readdir (dirp);
441	errorno = errno;	875	errorno = errno;
442		876
443	if (e)	877	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	880	strcpy (ent->d_name, e->d_name);
447	}	881	}
448	else	882	else
449	*res = 0;	883	*res = 0;
450		884
451	pthread_mutex_unlock (&readdirlock);	885	UNLOCK (readdirlock);
452		886
453	errno = errorno;	887	errno = errorno;
454	return e ? 0 : -1;	888	return e ? 0 : -1;
455	}	889	}
456	#endif	890	#endif
457		891
458	/* sendfile always needs emulation */	892	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
461	{	894	{
462	ssize_t res;	895	ssize_t res;
463		896
464	if (!count)	897	if (!count)
465	return 0;	898	return 0;
…		…
476	{	909	{
477	off_t sbytes;	910	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		912
480	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	915	res = sbytes;
483	}	916	}
484		917
485	# elif __hpux	918	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
499		932
500	if (res < 0 && sbytes)	933	if (res < 0 && sbytes)
501	res = sbytes;	934	res = sbytes;
502	}	935	}
503		936
		937	# endif
504	# else	938	#else
505	res = -1;	939	res = -1;
506	errno = ENOSYS;	940	errno = ENOSYS;
507	# endif
508	#endif	941	#endif
509		942
510	if (res < 0	943	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	944	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris	945	#if __solaris
…		…
514	#endif	947	#endif
515	)	948	)
516	)	949	)
517	{	950	{
518	/* emulate sendfile. this is a major pain in the ass */	951	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	952	dBUF;
		953
520	res = 0;	954	res = 0;
521		955
522	for (;;)	956	while (count)
523	{	957	{
524	ssize_t cnt;	958	ssize_t cnt;
525		959
526	cnt = pread (ifd, buf, 4096, offset);	960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		961
528	if (cnt <= 0)	962	if (cnt <= 0)
529	{	963	{
530	if (cnt && !res) res = -1;	964	if (cnt && !res) res = -1;
531	break;	965	break;
532	}	966	}
533		967
534	cnt = write (ofd, buf, cnt);	968	cnt = write (ofd, aio_buf, cnt);
535		969
536	if (cnt <= 0)	970	if (cnt <= 0)
537	{	971	{
538	if (cnt && !res) res = -1;	972	if (cnt && !res) res = -1;
539	break;	973	break;
540	}	974	}
541		975
542	offset += cnt;	976	offset += cnt;
543	res += cnt;	977	res += cnt;
		978	count -= cnt;
544	}	979	}
545	}	980	}
546		981
547	return res;	982	return res;
548	}	983	}
549		984
550	/* read a full directory */	985	/* read a full directory */
551	static int	986	static void scandir_ (aio_req req, worker *self)
552	scandir_ (const char *path, void **namesp)
553	{	987	{
554	DIR *dirp = opendir (path);	988	DIR *dirp;
555	union	989	union
556	{	990	{
557	struct dirent d;	991	struct dirent d;
558	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
559	} u;	993	} *u;
560	struct dirent *entp;	994	struct dirent *entp;
561	char *name, *names;	995	char *name, *names;
562	int memlen = 4096;	996	int memlen = 4096;
563	int memofs = 0;	997	int memofs = 0;
564	int res = 0;	998	int res = 0;
565	int errorno;	999	int errorno;
566		1000
567	if (!dirp)	1001	LOCK (wrklock);
568	return -1;	1002	self->dirp = dirp = opendir (req->ptr1);
569		1003	self->dbuf = u = malloc (sizeof (*u));
		1004	req->flags |= FLAG_PTR2_FREE;
570	names = malloc (memlen);	1005	req->ptr2 = names = malloc (memlen);
		1006	UNLOCK (wrklock);
		1007
		1008	if (dirp && u && names)
		1009	for (;;)
		1010	{
		1011	errno = 0;
		1012	readdir_r (dirp, &u->d, &entp);
		1013
		1014	if (!entp)
		1015	break;
		1016
		1017	name = entp->d_name;
		1018
		1019	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1020	{
		1021	int len = strlen (name) + 1;
		1022
		1023	res++;
		1024
		1025	while (memofs + len > memlen)
		1026	{
		1027	memlen *= 2;
		1028	LOCK (wrklock);
		1029	req->ptr2 = names = realloc (names, memlen);
		1030	UNLOCK (wrklock);
		1031
		1032	if (!names)
		1033	break;
		1034	}
		1035
		1036	memcpy (names + memofs, name, len);
		1037	memofs += len;
		1038	}
		1039	}
		1040
		1041	if (errno)
		1042	res = -1;
		1043
		1044	req->result = res;
		1045	}
		1046
		1047	/*****************************************************************************/
		1048
		1049	static void *aio_proc (void *thr_arg)
		1050	{
		1051	aio_req req;
		1052	struct timespec ts;
		1053	worker *self = (worker *)thr_arg;
		1054
		1055	/* try to distribute timeouts somewhat evenly */
		1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1057	* (1000000000UL / 1024UL);
571		1058
572	for (;;)	1059	for (;;)
573	{	1060	{
574	errno = 0, readdir_r (dirp, &u.d, &entp);	1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
575		1062
576	if (!entp)	1063	LOCK (reqlock);
577	break;
578
579	name = entp->d_name;
580
581	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
582	{
583	int len = strlen (name) + 1;
584
585	res++;
586
587	while (memofs + len > memlen)
588	{
589	memlen *= 2;
590	names = realloc (names, memlen);
591	if (!names)
592	break;
593	}
594
595	memcpy (names + memofs, name, len);
596	memofs += len;
597	}
598	}
599
600	errorno = errno;
601	closedir (dirp);
602
603	if (errorno)
604	{
605	free (names);
606	errno = errorno;
607	res = -1;
608	}
609
610	*namesp = (void *)names;
611	return res;
612	}
613
614	/*****************************************************************************/
615
616	static void *
617	aio_proc (void *thr_arg)
618	{
619	aio_req req;
620	int type;
621
622	do
623	{
624	pthread_mutex_lock (&reqlock);
625		1064
626	for (;;)	1065	for (;;)
627	{	1066	{
628	req = reqs;	1067	self->req = req = reqq_shift (&req_queue);
629
630	if (reqs)
631	{
632	reqs = reqs->next;
633	if (!reqs) reqe = 0;
634	}
635		1068
636	if (req)	1069	if (req)
637	break;	1070	break;
638		1071
639	pthread_cond_wait (&reqwait, &reqlock);	1072	++idle;
		1073
		1074	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1075	== ETIMEDOUT)
		1076	{
		1077	if (idle > max_idle)
		1078	{
		1079	--idle;
		1080	UNLOCK (reqlock);
		1081	LOCK (wrklock);
		1082	--started;
		1083	UNLOCK (wrklock);
		1084	goto quit;
		1085	}
		1086
		1087	/* we are allowed to idle, so do so without any timeout */
		1088	COND_WAIT (reqwait, reqlock);
		1089	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1090	}
		1091
		1092	--idle;
640	}	1093	}
641		1094
642	pthread_mutex_unlock (&reqlock);	1095	--nready;
		1096
		1097	UNLOCK (reqlock);
643		1098
644	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
645		1100
646	type = req->type;	1101	if (!(req->flags & FLAG_CANCELLED))
647
648	switch (type)	1102	switch (req->type)
		1103	{
		1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
		1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
		1106
		1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1109
		1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1113
		1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1115	case REQ_CLOSE: req->result = close (req->int1); break;
		1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1124
		1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1127	case REQ_READDIR: scandir_ (req, self); break;
		1128
		1129	case REQ_BUSY:
		1130	{
		1131	struct timeval tv;
		1132
		1133	tv.tv_sec = req->int1;
		1134	tv.tv_usec = req->int2;
		1135
		1136	req->result = select (0, 0, 0, 0, &tv);
		1137	}
		1138
		1139	case REQ_GROUP:
		1140	case REQ_NOP:
		1141	break;
		1142
		1143	case REQ_QUIT:
		1144	goto quit;
		1145
		1146	default:
		1147	req->result = ENOSYS;
		1148	break;
		1149	}
		1150
		1151	req->errorno = errno;
		1152
		1153	LOCK (reslock);
		1154
		1155	++npending;
		1156
		1157	if (!reqq_push (&res_queue, req))
649	{	1158	{
650	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
651	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
652
653	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
654	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
655
656	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
657	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
658	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
659
660	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
661	case REQ_CLOSE: req->result = close (req->fd); break;
662	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
663	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
664	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
665
666	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
667	case REQ_FSYNC: req->result = fsync (req->fd); break;
668	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
669
670	case REQ_QUIT:
671	break;
672
673	default:
674	req->result = ENOSYS;
675	break;
676	}
677
678	req->errorno = errno;
679
680	pthread_mutex_lock (&reslock);
681
682	req->next = 0;
683
684	if (rese)
685	{
686	rese->next = req;
687	rese = req;
688	}
689	else
690	{
691	rese = ress = req;
692
693	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
694	write (respipe [1], &respipe, 1);	1160	write (respipe [1], &respipe, 1);
		1161
		1162	/* optionally signal the main thread asynchronously */
		1163	if (main_sig)
		1164	pthread_kill (main_tid, main_sig);
695	}	1165	}
696		1166
697	pthread_mutex_unlock (&reslock);	1167	self->req = 0;
		1168	worker_clear (self);
		1169
		1170	UNLOCK (reslock);
698	}	1171	}
699	while (type != REQ_QUIT);	1172
		1173	quit:
		1174	LOCK (wrklock);
		1175	worker_free (self);
		1176	UNLOCK (wrklock);
700		1177
701	return 0;	1178	return 0;
702	}	1179	}
703		1180
704	/*****************************************************************************/	1181	/*****************************************************************************/
705		1182
706	static void atfork_prepare (void)	1183	static void atfork_prepare (void)
707	{	1184	{
708	pthread_mutex_lock (&reqlock);	1185	LOCK (wrklock);
709	pthread_mutex_lock (&reslock);	1186	LOCK (reqlock);
		1187	LOCK (reslock);
710	#if !HAVE_PREADWRITE	1188	#if !HAVE_PREADWRITE
711	pthread_mutex_lock (&preadwritelock);	1189	LOCK (preadwritelock);
712	#endif	1190	#endif
713	#if !HAVE_READDIR_R	1191	#if !HAVE_READDIR_R
714	pthread_mutex_lock (&readdirlock);	1192	LOCK (readdirlock);
715	#endif	1193	#endif
716	}	1194	}
717		1195
718	static void atfork_parent (void)	1196	static void atfork_parent (void)
719	{	1197	{
720	#if !HAVE_READDIR_R	1198	#if !HAVE_READDIR_R
721	pthread_mutex_unlock (&readdirlock);	1199	UNLOCK (readdirlock);
722	#endif	1200	#endif
723	#if !HAVE_PREADWRITE	1201	#if !HAVE_PREADWRITE
724	pthread_mutex_unlock (&preadwritelock);	1202	UNLOCK (preadwritelock);
725	#endif	1203	#endif
726	pthread_mutex_unlock (&reslock);	1204	UNLOCK (reslock);
727	pthread_mutex_unlock (&reqlock);	1205	UNLOCK (reqlock);
		1206	UNLOCK (wrklock);
728	}	1207	}
729		1208
730	static void atfork_child (void)	1209	static void atfork_child (void)
731	{	1210	{
732	aio_req prv;	1211	aio_req prv;
733		1212
734	started = 0;	1213	while (prv = reqq_shift (&req_queue))
		1214	req_free (prv);
735		1215
736	while (reqs)	1216	while (prv = reqq_shift (&res_queue))
		1217	req_free (prv);
		1218
		1219	while (wrk_first.next != &wrk_first)
737	{	1220	{
738	prv = reqs;	1221	worker *wrk = wrk_first.next;
739	reqs = prv->next;	1222
740	free_req (prv);	1223	if (wrk->req)
		1224	req_free (wrk->req);
		1225
		1226	worker_clear (wrk);
		1227	worker_free (wrk);
741	}	1228	}
742		1229
743	reqs = reqe = 0;	1230	started = 0;
744		1231	idle = 0;
745	while (ress)	1232	nreqs = 0;
746	{	1233	nready = 0;
747	prv = ress;	1234	npending = 0;
748	ress = prv->next;
749	free_req (prv);
750	}
751
752	ress = rese = 0;
753		1235
754	close (respipe [0]);	1236	close (respipe [0]);
755	close (respipe [1]);	1237	close (respipe [1]);
756	create_pipe ();	1238	create_pipe ();
757		1239
758	atfork_parent ();	1240	atfork_parent ();
759	}	1241	}
760		1242
761	#define dREQ \	1243	#define dREQ \
762	aio_req req; \	1244	aio_req req; \
		1245	int req_pri = next_pri; \
		1246	next_pri = DEFAULT_PRI + PRI_BIAS; \
763	\	1247	\
764	if (SvOK (callback) && !SvROK (callback)) \	1248	if (SvOK (callback) && !SvROK (callback)) \
765	croak ("clalback must be undef or of reference type"); \	1249	croak ("callback must be undef or of reference type"); \
766	\	1250	\
767	Newz (0, req, 1, aio_cb); \	1251	Newz (0, req, 1, aio_cb); \
768	if (!req) \	1252	if (!req) \
769	croak ("out of memory during aio_req allocation"); \	1253	croak ("out of memory during aio_req allocation"); \
770	\	1254	\
771	req->callback = newSVsv (callback);	1255	req->callback = newSVsv (callback); \
		1256	req->pri = req_pri
		1257
		1258	#define REQ_SEND \
		1259	req_send (req); \
		1260	\
		1261	if (GIMME_V != G_VOID) \
		1262	XPUSHs (req_sv (req, AIO_REQ_KLASS));
772		1263
773	MODULE = IO::AIO PACKAGE = IO::AIO	1264	MODULE = IO::AIO PACKAGE = IO::AIO
774		1265
775	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
776		1267
777	BOOT:	1268	BOOT:
778	{	1269	{
		1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
		1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1279
779	create_pipe ();	1280	create_pipe ();
780	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
781	}	1282	}
782		1283
783	void	1284	void
784	min_parallel(nthreads)	1285	max_poll_reqs (int nreqs)
785	int nthreads
786	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
787		1289
788	void	1290	void
789	max_parallel(nthreads)	1291	max_poll_time (double nseconds)
790	int nthreads
791	PROTOTYPE: $	1292	PROTOTYPE: $
		1293	CODE:
		1294	max_poll_time = nseconds * AIO_TICKS;
		1295
		1296	void
		1297	min_parallel (int nthreads)
		1298	PROTOTYPE: $
		1299
		1300	void
		1301	max_parallel (int nthreads)
		1302	PROTOTYPE: $
		1303
		1304	void
		1305	max_idle (int nthreads)
		1306	PROTOTYPE: $
		1307	CODE:
		1308	set_max_idle (nthreads);
792		1309
793	int	1310	int
794	max_outstanding(nreqs)	1311	max_outstanding (int maxreqs)
795	int nreqs	1312	PROTOTYPE: $
796	PROTOTYPE: $
797	CODE:	1313	CODE:
798	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
799	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
800		1318
801	void	1319	void
802	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
803	SV * pathname	1321	SV8 * pathname
804	int flags	1322	int flags
805	int mode	1323	int mode
806	SV * callback	1324	SV * callback
807	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
808	CODE:	1326	PPCODE:
809	{	1327	{
810	dREQ;	1328	dREQ;
811		1329
812	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
813	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
814	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
815	req->fd = flags;	1333	req->int1 = flags;
816	req->mode = mode;	1334	req->mode = mode;
817		1335
818	send_req (req);	1336	REQ_SEND;
819	}	1337	}
820		1338
821	void	1339	void
822	aio_close(fh,callback=&PL_sv_undef)	1340	aio_close (fh,callback=&PL_sv_undef)
823	SV * fh	1341	SV * fh
824	SV * callback	1342	SV * callback
825	PROTOTYPE: $;$	1343	PROTOTYPE: $;$
826	ALIAS:	1344	ALIAS:
827	aio_close = REQ_CLOSE	1345	aio_close = REQ_CLOSE
828	aio_fsync = REQ_FSYNC	1346	aio_fsync = REQ_FSYNC
829	aio_fdatasync = REQ_FDATASYNC	1347	aio_fdatasync = REQ_FDATASYNC
830	CODE:	1348	PPCODE:
831	{	1349	{
832	dREQ;	1350	dREQ;
833		1351
834	req->type = ix;	1352	req->type = ix;
835	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
836	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
837		1355
838	send_req (req);	1356	REQ_SEND (req);
839	}	1357	}
840		1358
841	void	1359	void
842	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
843	SV * fh	1361	SV * fh
844	UV offset	1362	UV offset
845	UV length	1363	UV length
846	SV * data	1364	SV8 * data
847	UV dataoffset	1365	UV dataoffset
848	SV * callback	1366	SV * callback
849	ALIAS:	1367	ALIAS:
850	aio_read = REQ_READ	1368	aio_read = REQ_READ
851	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
852	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
853	CODE:	1371	PPCODE:
854	{	1372	{
855	aio_req req;
856	STRLEN svlen;	1373	STRLEN svlen;
857	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
858		1375
859	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
860	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
872	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
873	}	1390	}
874	else	1391	else
875	{	1392	{
876	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
877	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
878	}	1395	}
879		1396
880	if (length < 0)	1397	if (length < 0)
881	croak ("length must not be negative");	1398	croak ("length must not be negative");
882		1399
883	{	1400	{
884	dREQ;	1401	dREQ;
885		1402
886	req->type = ix;	1403	req->type = ix;
887	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
888	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
889	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
890	req->offset = offset;	1407	req->offs = offset;
891	req->length = length;	1408	req->size = length;
892	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
893	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
894		1412
895	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
896	{	1414	{
897	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
898	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
899	}	1417	}
900		1418
901	send_req (req);	1419	REQ_SEND;
902	}	1420	}
903	}	1421	}
904		1422
905	void	1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		1428	PPCODE:
		1429	{
		1430	SV *data;
		1431	dREQ;
		1432
		1433	data = newSV (NAME_MAX);
		1434	SvPOK_on (data);
		1435
		1436	req->type = REQ_READLINK;
		1437	req->fh = newSVsv (path);
		1438	req->ptr2 = SvPVbyte_nolen (req->fh);
		1439	req->sv1 = data;
		1440	req->ptr1 = SvPVbyte_nolen (data);
		1441
		1442	REQ_SEND;
		1443	}
		1444
		1445	void
906	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
907	SV * out_fh	1447	SV * out_fh
908	SV * in_fh	1448	SV * in_fh
909	UV in_offset	1449	UV in_offset
910	UV length	1450	UV length
911	SV * callback	1451	SV * callback
912	PROTOTYPE: $$$$;$	1452	PROTOTYPE: $$$$;$
913	CODE:	1453	PPCODE:
914	{	1454	{
915	dREQ;	1455	dREQ;
916		1456
917	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
918	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
919	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
920	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
921	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
922	req->offset = in_offset;	1462	req->offs = in_offset;
923	req->length = length;	1463	req->size = length;
924		1464
925	send_req (req);	1465	REQ_SEND;
926	}	1466	}
927		1467
928	void	1468	void
929	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1469	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
930	SV * fh	1470	SV * fh
931	UV offset	1471	UV offset
932	IV length	1472	IV length
933	SV * callback	1473	SV * callback
934	PROTOTYPE: $$$;$	1474	PROTOTYPE: $$$;$
935	CODE:	1475	PPCODE:
936	{	1476	{
937	dREQ;	1477	dREQ;
938		1478
939	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
940	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
941	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
942	req->offset = offset;	1482	req->offs = offset;
943	req->length = length;	1483	req->size = length;
944		1484
945	send_req (req);	1485	REQ_SEND;
946	}	1486	}
947		1487
948	void	1488	void
949	aio_stat(fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
950	SV * fh_or_path	1490	SV8 * fh_or_path
951	SV * callback	1491	SV * callback
952	ALIAS:	1492	ALIAS:
953	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
954	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
955	CODE:	1495	PPCODE:
956	{	1496	{
957	dREQ;	1497	dREQ;
958		1498
959	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
960	if (!req->statdata)	1500	if (!req->ptr2)
961	{	1501	{
962	free_req (req);	1502	req_free (req);
963	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
964	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
965		1507
966	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
967	{	1509	{
968	req->type = ix;	1510	req->type = ix;
969	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
970	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
971	}	1513	}
972	else	1514	else
973	{	1515	{
974	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
975	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
976	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
977	}	1519	}
978		1520
979	send_req (req);	1521	REQ_SEND;
980	}	1522	}
981		1523
982	void	1524	void
983	aio_unlink(pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
984	SV * pathname	1526	SV8 * pathname
985	SV * callback	1527	SV * callback
986	ALIAS:	1528	ALIAS:
987	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
988	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
		1531	aio_readdir = REQ_READDIR
989	CODE:	1532	PPCODE:
990	{	1533	{
991	dREQ;	1534	dREQ;
992		1535
993	req->type = ix;	1536	req->type = ix;
994	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
995	req->dataptr = SvPVbyte_nolen (req->data);	1538	req->ptr1 = SvPVbyte_nolen (req->sv1);
996
997	send_req (req);
998	}
999		1539
		1540	REQ_SEND;
		1541	}
		1542
1000	void	1543	void
1001	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
1002	SV * oldpath	1545	SV8 * pathname
1003	SV * newpath	1546	UV mode
1004	SV * callback	1547	SV * callback
1005	CODE:	1548	PPCODE:
1006	{	1549	{
1007	dREQ;	1550	dREQ;
1008		1551
1009	req->type = REQ_SYMLINK;	1552	req->type = REQ_MKDIR;
1010	req->fh = newSVsv (oldpath);	1553	req->sv1 = newSVsv (pathname);
1011	req->data2ptr = SvPVbyte_nolen (req->fh);	1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->data = newSVsv (newpath);	1555	req->mode = mode;
1013	req->dataptr = SvPVbyte_nolen (req->data);
1014
1015	send_req (req);
1016	}
1017		1556
		1557	REQ_SEND;
		1558	}
		1559
1018	void	1560	void
1019	aio_readdir(pathname,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1020	SV * pathname	1562	SV8 * oldpath
		1563	SV8 * newpath
1021	SV * callback	1564	SV * callback
		1565	ALIAS:
		1566	aio_link = REQ_LINK
		1567	aio_symlink = REQ_SYMLINK
		1568	aio_rename = REQ_RENAME
1022	CODE:	1569	PPCODE:
1023	{	1570	{
1024	dREQ;	1571	dREQ;
1025		1572
1026	req->type = REQ_READDIR;	1573	req->type = ix;
1027	req->data = newSVsv (pathname);	1574	req->fh = newSVsv (oldpath);
1028	req->dataptr = SvPVbyte_nolen (req->data);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
		1576	req->sv1 = newSVsv (newpath);
		1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1029		1578
1030	send_req (req);	1579	REQ_SEND;
1031	}	1580	}
1032		1581
1033	void	1582	void
		1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1584	SV8 * pathname
		1585	UV mode
		1586	UV dev
		1587	SV * callback
		1588	PPCODE:
		1589	{
		1590	dREQ;
		1591
		1592	req->type = REQ_MKNOD;
		1593	req->sv1 = newSVsv (pathname);
		1594	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1595	req->mode = (mode_t)mode;
		1596	req->offs = dev;
		1597
		1598	REQ_SEND;
		1599	}
		1600
		1601	void
		1602	aio_busy (delay,callback=&PL_sv_undef)
		1603	double delay
		1604	SV * callback
		1605	PPCODE:
		1606	{
		1607	dREQ;
		1608
		1609	req->type = REQ_BUSY;
		1610	req->int1 = delay < 0. ? 0 : delay;
		1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
		1612
		1613	REQ_SEND;
		1614	}
		1615
		1616	void
		1617	aio_group (callback=&PL_sv_undef)
		1618	SV * callback
		1619	PROTOTYPE: ;$
		1620	PPCODE:
		1621	{
		1622	dREQ;
		1623
		1624	req->type = REQ_GROUP;
		1625
		1626	req_send (req);
		1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1628	}
		1629
		1630	void
		1631	aio_nop (callback=&PL_sv_undef)
		1632	SV * callback
		1633	PPCODE:
		1634	{
		1635	dREQ;
		1636
		1637	req->type = REQ_NOP;
		1638
		1639	REQ_SEND;
		1640	}
		1641
		1642	int
		1643	aioreq_pri (int pri = 0)
		1644	PROTOTYPE: ;$
		1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
		1649	if (pri < PRI_MIN) pri = PRI_MIN;
		1650	if (pri > PRI_MAX) pri = PRI_MAX;
		1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	void
		1657	aioreq_nice (int nice = 0)
		1658	CODE:
		1659	nice = next_pri - nice;
		1660	if (nice < PRI_MIN) nice = PRI_MIN;
		1661	if (nice > PRI_MAX) nice = PRI_MAX;
		1662	next_pri = nice + PRI_BIAS;
		1663
		1664	void
1034	flush()	1665	flush ()
1035	PROTOTYPE:	1666	PROTOTYPE:
1036	CODE:	1667	CODE:
1037	while (nreqs)	1668	while (nreqs)
1038	{	1669	{
1039	poll_wait ();	1670	poll_wait ();
1040	poll_cb ();	1671	poll_cb ();
1041	}	1672	}
1042		1673
1043	void	1674	int
1044	poll()	1675	poll()
1045	PROTOTYPE:	1676	PROTOTYPE:
1046	CODE:	1677	CODE:
1047	if (nreqs)
1048	{
1049	poll_wait ();	1678	poll_wait ();
1050	poll_cb ();	1679	RETVAL = poll_cb ();
1051	}	1680	OUTPUT:
		1681	RETVAL
1052		1682
1053	int	1683	int
1054	poll_fileno()	1684	poll_fileno()
1055	PROTOTYPE:	1685	PROTOTYPE:
1056	CODE:	1686	CODE:
…		…
1068		1698
1069	void	1699	void
1070	poll_wait()	1700	poll_wait()
1071	PROTOTYPE:	1701	PROTOTYPE:
1072	CODE:	1702	CODE:
1073	if (nreqs)
1074	poll_wait ();	1703	poll_wait ();
		1704
		1705	void
		1706	setsig (int signum = SIGIO)
		1707	PROTOTYPE: ;$
		1708	CODE:
		1709	{
		1710	if (block_sig_level)
		1711	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1712
		1713	LOCK (reslock);
		1714	main_tid = pthread_self ();
		1715	main_sig = signum;
		1716	UNLOCK (reslock);
		1717
		1718	if (main_sig && npending)
		1719	pthread_kill (main_tid, main_sig);
		1720	}
		1721
		1722	void
		1723	aio_block (SV *cb)
		1724	PROTOTYPE: &
		1725	PPCODE:
		1726	{
		1727	int count;
		1728
		1729	block_sig ();
		1730	PUSHMARK (SP);
		1731	PUTBACK;
		1732	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1733	SPAGAIN;
		1734	unblock_sig ();
		1735
		1736	if (SvTRUE (ERRSV))
		1737	croak (0);
		1738
		1739	XSRETURN (count);
		1740	}
1075		1741
1076	int	1742	int
1077	nreqs()	1743	nreqs()
1078	PROTOTYPE:	1744	PROTOTYPE:
1079	CODE:	1745	CODE:
1080	RETVAL = nreqs;	1746	RETVAL = nreqs;
1081	OUTPUT:	1747	OUTPUT:
1082	RETVAL	1748	RETVAL
1083		1749
		1750	int
		1751	nready()
		1752	PROTOTYPE:
		1753	CODE:
		1754	RETVAL = get_nready ();
		1755	OUTPUT:
		1756	RETVAL
		1757
		1758	int
		1759	npending()
		1760	PROTOTYPE:
		1761	CODE:
		1762	RETVAL = get_npending ();
		1763	OUTPUT:
		1764	RETVAL
		1765
		1766	int
		1767	nthreads()
		1768	PROTOTYPE:
		1769	CODE:
		1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1771	RETVAL = started;
		1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1773	OUTPUT:
		1774	RETVAL
		1775
		1776	PROTOTYPES: DISABLE
		1777
		1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1779
		1780	void
		1781	cancel (aio_req_ornot req)
		1782	CODE:
		1783	req_cancel (req);
		1784
		1785	void
		1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1787	CODE:
		1788	SvREFCNT_dec (req->callback);
		1789	req->callback = newSVsv (callback);
		1790
		1791	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1792
		1793	void
		1794	add (aio_req grp, ...)
		1795	PPCODE:
		1796	{
		1797	int i;
		1798	aio_req req;
		1799
		1800	if (main_sig && !block_sig_level)
		1801	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1802
		1803	if (grp->int1 == 2)
		1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1805
		1806	for (i = 1; i < items; ++i )
		1807	{
		1808	if (GIMME_V != G_VOID)
		1809	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1810
		1811	req = SvAIO_REQ (ST (i));
		1812
		1813	if (req)
		1814	{
		1815	++grp->size;
		1816	req->grp = grp;
		1817
		1818	req->grp_prev = 0;
		1819	req->grp_next = grp->grp_first;
		1820
		1821	if (grp->grp_first)
		1822	grp->grp_first->grp_prev = req;
		1823
		1824	grp->grp_first = req;
		1825	}
		1826	}
		1827	}
		1828
		1829	void
		1830	cancel_subs (aio_req_ornot req)
		1831	CODE:
		1832	req_cancel_subs (req);
		1833
		1834	void
		1835	result (aio_req grp, ...)
		1836	CODE:
		1837	{
		1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
		1843	av = newAV ();
		1844
		1845	for (i = 1; i < items; ++i )
		1846	av_push (av, newSVsv (ST (i)));
		1847
		1848	SvREFCNT_dec (grp->sv1);
		1849	grp->sv1 = (SV *)av;
		1850	}
		1851
		1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
		1856
		1857	void
		1858	limit (aio_req grp, int limit)
		1859	CODE:
		1860	grp->int2 = limit;
		1861	aio_grp_feed (grp);
		1862
		1863	void
		1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1865	CODE:
		1866	{
		1867	SvREFCNT_dec (grp->sv2);
		1868	grp->sv2 = newSVsv (callback);
		1869
		1870	if (grp->int2 <= 0)
		1871	grp->int2 = 2;
		1872
		1873	aio_grp_feed (grp);
		1874	}
		1875

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