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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.102 by root, Sun Jun 3 09:44:17 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>
18	#include <signal.h>	21	#include <signal.h>
19	#include <sched.h>	22	#include <sched.h>
		23	#include <utime.h>
20		24
21	#if HAVE_SENDFILE	25	#if HAVE_SENDFILE
22	# if __linux	26	# if __linux
23	# include <sys/sendfile.h>	27	# include <sys/sendfile.h>
24	# elif __freebsd	28	# elif __freebsd
…		…
31	# else	35	# else
32	# error sendfile support requested but not available	36	# error sendfile support requested but not available
33	# endif	37	# endif
34	#endif	38	#endif
35		39
36	#if __ia64	40	/* number of seconds after which idle threads exit */
		41	#define IDLE_TIMEOUT 10
		42
		43	/* used for struct dirent, AIX doesn't provide it */
		44	#ifndef NAME_MAX
		45	# define NAME_MAX 4096
		46	#endif
		47
		48	/* buffer size for various temporary buffers */
37	# define STACKSIZE 65536	49	#define AIO_BUFSIZE 65536
		50
		51	/* use NV for 32 bit perls as it allows larger offsets */
		52	#if IVSIZE >= 8
		53	# define SvVAL64 SvIV
38	#else	54	#else
39	# define STACKSIZE 8192	55	# define SvVAL64 SvNV
40	#endif	56	#endif
		57
		58	#define dBUF \
		59	char *aio_buf; \
		60	LOCK (wrklock); \
		61	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		62	UNLOCK (wrklock); \
		63	if (!aio_buf) \
		64	return -1;
		65
		66	typedef SV SV8; /* byte-sv, used for argument-checking */
41		67
42	enum {	68	enum {
43	REQ_QUIT,	69	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	70	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	71	REQ_READ, REQ_WRITE,
46	REQ_SENDFILE,	72	REQ_READAHEAD, REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	73	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		74	REQ_UTIME, REQ_FUTIME,
		75	REQ_CHMOD, REQ_FCHMOD,
		76	REQ_CHOWN, REQ_FCHOWN,
48	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
50	REQ_READDIR,	79	REQ_MKNOD, REQ_READDIR,
51	REQ_SYMLINK,	80	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
52	};	83	};
53		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
54	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
55	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
56		91
		92	SV *callback;
		93	SV *sv1, *sv2;
		94	void *ptr1, *ptr2;
		95	off_t offs;
		96	size_t size;
		97	ssize_t result;
		98	double nv1, nv2;
		99
		100	STRLEN stroffset;
57	int type;	101	int type;
58		102	int int1, int2, int3;
59	/* should receive a cleanup, with unions */	103	int errorno;
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */	104	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		105
71	Stat_t *statdata;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV *self; /* the perl counterpart of this request, if any */
		110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72	} aio_cb;	111	} aio_cb;
73		112
		113	enum {
		114	FLAG_CANCELLED = 0x01, /* request was cancelled */
		115	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		116	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		117	};
		118
74	typedef aio_cb *aio_req;	119	typedef aio_cb *aio_req;
		120	typedef aio_cb *aio_req_ornot;
75		121
		122	enum {
		123	PRI_MIN = -4,
		124	PRI_MAX = 4,
		125
		126	DEFAULT_PRI = 0,
		127	PRI_BIAS = -PRI_MIN,
		128	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		129	};
		130
		131	#define AIO_TICKS ((1000000 + 1023) >> 10)
		132
		133	static unsigned int max_poll_time = 0;
		134	static unsigned int max_poll_reqs = 0;
		135
		136	/* calculcate time difference in ~1/AIO_TICKS of a second */
		137	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		138	{
		139	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		140	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		141	}
		142
		143	static thread_t main_tid;
		144	static int main_sig;
		145	static int block_sig_level;
		146
		147	void block_sig ()
		148	{
		149	sigset_t ss;
		150
		151	if (block_sig_level++)
		152	return;
		153
		154	if (!main_sig)
		155	return;
		156
		157	sigemptyset (&ss);
		158	sigaddset (&ss, main_sig);
		159	pthread_sigmask (SIG_BLOCK, &ss, 0);
		160	}
		161
		162	void unblock_sig ()
		163	{
		164	sigset_t ss;
		165
		166	if (--block_sig_level)
		167	return;
		168
		169	if (!main_sig)
		170	return;
		171
		172	sigemptyset (&ss);
		173	sigaddset (&ss, main_sig);
		174	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		175	}
		176
		177	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		178
76	static int started, wanted;	179	static unsigned int started, idle, wanted;
77	static volatile int nreqs;	180
78	static int max_outstanding = 1<<30;	181	/* worker threads management */
		182	static mutex_t wrklock = MUTEX_INIT;
		183
		184	typedef struct worker {
		185	/* locked by wrklock */
		186	struct worker *prev, *next;
		187
		188	thread_t tid;
		189
		190	/* locked by reslock, reqlock or wrklock */
		191	aio_req req; /* currently processed request */
		192	void *dbuf;
		193	DIR *dirp;
		194	} worker;
		195
		196	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		197
		198	static void worker_clear (worker *wrk)
		199	{
		200	if (wrk->dirp)
		201	{
		202	closedir (wrk->dirp);
		203	wrk->dirp = 0;
		204	}
		205
		206	if (wrk->dbuf)
		207	{
		208	free (wrk->dbuf);
		209	wrk->dbuf = 0;
		210	}
		211	}
		212
		213	static void worker_free (worker *wrk)
		214	{
		215	wrk->next->prev = wrk->prev;
		216	wrk->prev->next = wrk->next;
		217
		218	free (wrk);
		219	}
		220
		221	static volatile unsigned int nreqs, nready, npending;
		222	static volatile unsigned int max_idle = 4;
		223	static volatile unsigned int max_outstanding = 0xffffffff;
79	static int respipe [2];	224	static int respipe [2];
80		225
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	226	static mutex_t reslock = MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	227	static mutex_t reqlock = MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	228	static cond_t reqwait = COND_INIT;
84		229
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	#if WORDACCESS_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		231
		232	static unsigned int get_nready ()
		233	{
		234	unsigned int retval;
		235
		236	LOCK (reqlock);
		237	retval = nready;
		238	UNLOCK (reqlock);
		239
		240	return retval;
		241	}
		242
		243	static unsigned int get_npending ()
		244	{
		245	unsigned int retval;
		246
		247	LOCK (reslock);
		248	retval = npending;
		249	UNLOCK (reslock);
		250
		251	return retval;
		252	}
		253
		254	static unsigned int get_nthreads ()
		255	{
		256	unsigned int retval;
		257
		258	LOCK (wrklock);
		259	retval = started;
		260	UNLOCK (wrklock);
		261
		262	return retval;
		263	}
		264
		265	#else
		266
		267	# define get_nready() nready
		268	# define get_npending() npending
		269	# define get_nthreads() started
		270
		271	#endif
		272
		273	/*
		274	* a somewhat faster data structure might be nice, but
		275	* with 8 priorities this actually needs <20 insns
		276	* per shift, the most expensive operation.
		277	*/
		278	typedef struct {
		279	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		280	int size;
		281	} reqq;
		282
		283	static reqq req_queue;
		284	static reqq res_queue;
		285
		286	int reqq_push (reqq *q, aio_req req)
		287	{
		288	int pri = req->pri;
		289	req->next = 0;
		290
		291	if (q->qe[pri])
		292	{
		293	q->qe[pri]->next = req;
		294	q->qe[pri] = req;
		295	}
		296	else
		297	q->qe[pri] = q->qs[pri] = req;
		298
		299	return q->size++;
		300	}
		301
		302	aio_req reqq_shift (reqq *q)
		303	{
		304	int pri;
		305
		306	if (!q->size)
		307	return 0;
		308
		309	--q->size;
		310
		311	for (pri = NUM_PRI; pri--; )
		312	{
		313	aio_req req = q->qs[pri];
		314
		315	if (req)
		316	{
		317	if (!(q->qs[pri] = req->next))
		318	q->qe[pri] = 0;
		319
		320	return req;
		321	}
		322	}
		323
		324	abort ();
		325	}
		326
		327	static int poll_cb ();
		328	static int req_invoke (aio_req req);
		329	static void req_destroy (aio_req req);
88	static void free_req (aio_req req)	330	static void req_cancel (aio_req req);
		331
		332	/* must be called at most once */
		333	static SV *req_sv (aio_req req, const char *klass)
89	{	334	{
		335	if (!req->self)
		336	{
		337	req->self = (SV *)newHV ();
		338	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		339	}
		340
		341	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		342	}
		343
		344	static aio_req SvAIO_REQ (SV *sv)
		345	{
		346	MAGIC *mg;
		347
		348	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		349	croak ("object of class " AIO_REQ_KLASS " expected");
		350
		351	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		352
		353	return mg ? (aio_req)mg->mg_ptr : 0;
		354	}
		355
		356	static void aio_grp_feed (aio_req grp)
		357	{
		358	block_sig ();
		359
		360	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		361	{
		362	int old_len = grp->size;
		363
		364	if (grp->sv2 && SvOK (grp->sv2))
		365	{
		366	dSP;
		367
		368	ENTER;
		369	SAVETMPS;
		370	PUSHMARK (SP);
		371	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		372	PUTBACK;
		373	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		374	SPAGAIN;
		375	FREETMPS;
		376	LEAVE;
		377	}
		378
		379	/* stop if no progress has been made */
		380	if (old_len == grp->size)
		381	{
		382	SvREFCNT_dec (grp->sv2);
		383	grp->sv2 = 0;
		384	break;
		385	}
		386	}
		387
		388	unblock_sig ();
		389	}
		390
		391	static void aio_grp_dec (aio_req grp)
		392	{
		393	--grp->size;
		394
		395	/* call feeder, if applicable */
		396	aio_grp_feed (grp);
		397
		398	/* finish, if done */
		399	if (!grp->size && grp->int1)
		400	{
		401	block_sig ();
		402
		403	if (!req_invoke (grp))
		404	{
		405	req_destroy (grp);
		406	unblock_sig ();
		407	croak (0);
		408	}
		409
		410	req_destroy (grp);
		411	unblock_sig ();
		412	}
		413	}
		414
		415	static int req_invoke (aio_req req)
		416	{
		417	dSP;
		418
		419	if (req->flags & FLAG_SV2_RO_OFF)
		420	SvREADONLY_off (req->sv2);
		421
		422	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		423	{
		424	ENTER;
		425	SAVETMPS;
		426	PUSHMARK (SP);
		427	EXTEND (SP, 1);
		428
		429	switch (req->type)
		430	{
		431	case REQ_READDIR:
		432	{
		433	SV *rv = &PL_sv_undef;
		434
		435	if (req->result >= 0)
		436	{
		437	int i;
		438	char *buf = req->ptr2;
		439	AV *av = newAV ();
		440
		441	av_extend (av, req->result - 1);
		442
		443	for (i = 0; i < req->result; ++i)
		444	{
		445	SV *sv = newSVpv (buf, 0);
		446
		447	av_store (av, i, sv);
		448	buf += SvCUR (sv) + 1;
		449	}
		450
		451	rv = sv_2mortal (newRV_noinc ((SV *)av));
		452	}
		453
		454	PUSHs (rv);
		455	}
		456	break;
		457
		458	case REQ_OPEN:
		459	{
		460	/* convert fd to fh */
		461	SV *fh;
		462
		463	PUSHs (sv_2mortal (newSViv (req->result)));
		464	PUTBACK;
		465	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		466	SPAGAIN;
		467
		468	fh = POPs;
		469	PUSHMARK (SP);
		470	XPUSHs (fh);
		471	}
		472	break;
		473
		474	case REQ_GROUP:
		475	req->int1 = 2; /* mark group as finished */
		476
		477	if (req->sv1)
		478	{
		479	int i;
		480	AV *av = (AV *)req->sv1;
		481
		482	EXTEND (SP, AvFILL (av) + 1);
		483	for (i = 0; i <= AvFILL (av); ++i)
		484	PUSHs (*av_fetch (av, i, 0));
		485	}
		486	break;
		487
		488	case REQ_NOP:
		489	case REQ_BUSY:
		490	break;
		491
		492	case REQ_READLINK:
		493	if (req->result > 0)
		494	{
		495	SvCUR_set (req->sv2, req->result);
		496	*SvEND (req->sv2) = 0;
		497	PUSHs (req->sv2);
		498	}
		499	break;
		500
		501	case REQ_STAT:
		502	case REQ_LSTAT:
		503	case REQ_FSTAT:
		504	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		505	PL_laststatval = req->result;
		506	PL_statcache = *(Stat_t *)(req->ptr2);
		507	PUSHs (sv_2mortal (newSViv (req->result)));
		508	break;
		509
		510	case REQ_READ:
		511	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		512	*SvEND (req->sv2) = 0;
		513	PUSHs (sv_2mortal (newSViv (req->result)));
		514	break;
		515
		516	default:
		517	PUSHs (sv_2mortal (newSViv (req->result)));
		518	break;
		519	}
		520
		521	errno = req->errorno;
		522
		523	PUTBACK;
		524	call_sv (req->callback, G_VOID | G_EVAL);
		525	SPAGAIN;
		526
		527	FREETMPS;
		528	LEAVE;
		529	}
		530
90	if (req->data)	531	if (req->grp)
91	SvREFCNT_dec (req->data);	532	{
		533	aio_req grp = req->grp;
92		534
		535	/* unlink request */
		536	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		537	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		538
		539	if (grp->grp_first == req)
		540	grp->grp_first = req->grp_next;
		541
		542	aio_grp_dec (grp);
		543	}
		544
		545	return !SvTRUE (ERRSV);
		546	}
		547
		548	static void req_destroy (aio_req req)
		549	{
93	if (req->fh)	550	if (req->self)
		551	{
		552	sv_unmagic (req->self, PERL_MAGIC_ext);
94	SvREFCNT_dec (req->fh);	553	SvREFCNT_dec (req->self);
		554	}
95		555
96	if (req->fh2)	556	SvREFCNT_dec (req->sv1);
97	SvREFCNT_dec (req->fh2);	557	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	558	SvREFCNT_dec (req->callback);
104		559
105	if (req->type == REQ_READDIR && req->result >= 0)	560	if (req->flags & FLAG_PTR2_FREE)
106	free (req->data2ptr);	561	free (req->ptr2);
107		562
108	Safefree (req);	563	Safefree (req);
109	}	564	}
110		565
111	static void	566	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	567	{
114	if (nreqs && !ress)	568	aio_req sub;
		569
		570	if (grp->type != REQ_GROUP)
		571	return;
		572
		573	SvREFCNT_dec (grp->sv2);
		574	grp->sv2 = 0;
		575
		576	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		577	req_cancel (sub);
		578	}
		579
		580	static void req_cancel (aio_req req)
		581	{
		582	req->flags |= FLAG_CANCELLED;
		583
		584	req_cancel_subs (req);
		585	}
		586
		587	static void *aio_proc (void *arg);
		588
		589	static void start_thread (void)
		590	{
		591	worker *wrk = calloc (1, sizeof (worker));
		592
		593	if (!wrk)
		594	croak ("unable to allocate worker thread data");
		595
		596	LOCK (wrklock);
		597
		598	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
115	{	599	{
		600	wrk->prev = &wrk_first;
		601	wrk->next = wrk_first.next;
		602	wrk_first.next->prev = wrk;
		603	wrk_first.next = wrk;
		604	++started;
		605	}
		606	else
		607	free (wrk);
		608
		609	UNLOCK (wrklock);
		610	}
		611
		612	static void maybe_start_thread ()
		613	{
		614	if (get_nthreads () >= wanted)
		615	return;
		616
		617	/* todo: maybe use idle here, but might be less exact */
		618	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		619	return;
		620
		621	start_thread ();
		622	}
		623
		624	static void req_send (aio_req req)
		625	{
		626	block_sig ();
		627
		628	++nreqs;
		629
		630	LOCK (reqlock);
		631	++nready;
		632	reqq_push (&req_queue, req);
		633	COND_SIGNAL (reqwait);
		634	UNLOCK (reqlock);
		635
		636	unblock_sig ();
		637
		638	maybe_start_thread ();
		639	}
		640
		641	static void end_thread (void)
		642	{
		643	aio_req req;
		644
		645	Newz (0, req, 1, aio_cb);
		646
		647	req->type = REQ_QUIT;
		648	req->pri = PRI_MAX + PRI_BIAS;
		649
		650	LOCK (reqlock);
		651	reqq_push (&req_queue, req);
		652	COND_SIGNAL (reqwait);
		653	UNLOCK (reqlock);
		654
		655	LOCK (wrklock);
		656	--started;
		657	UNLOCK (wrklock);
		658	}
		659
		660	static void set_max_idle (int nthreads)
		661	{
		662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		663	max_idle = nthreads <= 0 ? 1 : nthreads;
		664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		665	}
		666
		667	static void min_parallel (int nthreads)
		668	{
		669	if (wanted < nthreads)
		670	wanted = nthreads;
		671	}
		672
		673	static void max_parallel (int nthreads)
		674	{
		675	if (wanted > nthreads)
		676	wanted = nthreads;
		677
		678	while (started > wanted)
		679	end_thread ();
		680	}
		681
		682	static void poll_wait ()
		683	{
116	fd_set rfd;	684	fd_set rfd;
		685
		686	while (nreqs)
		687	{
		688	int size;
		689	if (WORDACCESS_UNSAFE) LOCK (reslock);
		690	size = res_queue.size;
		691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		692
		693	if (size)
		694	return;
		695
		696	maybe_start_thread ();
		697
117	FD_ZERO(&rfd);	698	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	699	FD_SET(respipe [0], &rfd);
119		700
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	701	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	702	}
122	}	703	}
123		704
124	static int	705	static int poll_cb ()
125	poll_cb ()
126	{	706	{
127	dSP;	707	dSP;
128	int count = 0;	708	int count = 0;
		709	int maxreqs = max_poll_reqs;
129	int do_croak = 0;	710	int do_croak = 0;
		711	struct timeval tv_start, tv_now;
130	aio_req req;	712	aio_req req;
		713
		714	if (max_poll_time)
		715	gettimeofday (&tv_start, 0);
		716
		717	block_sig ();
131		718
132	for (;;)	719	for (;;)
133	{	720	{
134	pthread_mutex_lock (&reslock);	721	for (;;)
135	req = ress;
136
137	if (req)
138	{	722	{
139	ress = req->next;	723	maybe_start_thread ();
140		724
		725	LOCK (reslock);
		726	req = reqq_shift (&res_queue);
		727
141	if (!ress)	728	if (req)
142	{	729	{
		730	--npending;
		731
		732	if (!res_queue.size)
		733	{
143	/* read any signals sent by the worker threads */	734	/* read any signals sent by the worker threads */
144	char buf [32];	735	char buf [4];
145	while (read (respipe [0], buf, 32) == 32)	736	while (read (respipe [0], buf, 4) == 4)
		737	;
146	;	738	}
147
148	rese = 0;
149	}	739	}
150	}
151		740
152	pthread_mutex_unlock (&reslock);	741	UNLOCK (reslock);
153		742
154	if (!req)	743	if (!req)
155	break;	744	break;
156		745
157	nreqs--;	746	--nreqs;
158		747
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)	748	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	{	749	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	750	req->int1 = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	751	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	}	752	}
205	else	753	else
206	{	754	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));	755	if (!req_invoke (req))
208
209	if (req->type == REQ_OPEN)
210	{	756	{
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);	757	req_destroy (req);
		758	unblock_sig ();
234	croak (0);	759	croak (0);
235	}	760	}
		761
		762	count++;
236	}	763	}
237		764
238	LEAVE;	765	req_destroy (req);
239		766
240	errno = errorno;	767	if (maxreqs && !--maxreqs)
241	count++;	768	break;
		769
		770	if (max_poll_time)
		771	{
		772	gettimeofday (&tv_now, 0);
		773
		774	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		775	break;
		776	}
242	}	777	}
243		778
244	free_req (req);	779	if (nreqs <= max_outstanding)
		780	break;
		781
		782	poll_wait ();
		783
		784	++maxreqs;
245	}	785	}
246		786
		787	unblock_sig ();
247	return count;	788	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	}	789	}
342		790
343	static void create_pipe ()	791	static void create_pipe ()
344	{	792	{
345	if (pipe (respipe))	793	if (pipe (respipe))
…		…
362	/*	810	/*
363	* make our pread/pwrite safe against themselves, but not against	811	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,	812	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.	813	* but that's your problem, not mine.
366	*/	814	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	815	static mutex_t preadwritelock = MUTEX_INIT;
368		816
369	static ssize_t	817	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	{	818	{
372	ssize_t res;	819	ssize_t res;
373	off_t ooffset;	820	off_t ooffset;
374		821
375	pthread_mutex_lock (&preadwritelock);	822	LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	823	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	824	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	825	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	826	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	827	UNLOCK (preadwritelock);
381		828
382	return res;	829	return res;
383	}	830	}
384		831
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)	832	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
387	{	833	{
388	ssize_t res;	834	ssize_t res;
389	off_t ooffset;	835	off_t ooffset;
390		836
391	pthread_mutex_lock (&preadwritelock);	837	LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	838	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	839	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	840	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	841	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	842	UNLOCK (preadwritelock);
397		843
398	return res;	844	return res;
399	}	845	}
		846	#endif
		847
		848	#ifndef HAVE_FUTIMES
		849
		850	# define utimes(path,times) aio_utimes (path, times)
		851	# define futimes(fd,times) aio_futimes (fd, times)
		852
		853	int aio_utimes (const char *filename, const struct timeval times[2])
		854	{
		855	if (times)
		856	{
		857	struct utimbuf buf;
		858
		859	buf.actime = times[0].tv_sec;
		860	buf.modtime = times[1].tv_sec;
		861
		862	return utime (filename, &buf);
		863	}
		864	else
		865	return utime (filename, 0);
		866	}
		867
		868	int aio_futimes (int fd, const struct timeval tv[2])
		869	{
		870	errno = ENOSYS;
		871	return -1;
		872	}
		873
400	#endif	874	#endif
401		875
402	#if !HAVE_FDATASYNC	876	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	877	# define fdatasync fsync
404	#endif	878	#endif
405		879
406	#if !HAVE_READAHEAD	880	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	881	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		882
409	static ssize_t	883	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	{	884	{
412	char readahead_buf[4096];	885	dBUF;
413		886
414	while (count > 0)	887	while (count > 0)
415	{	888	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	889	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
417		890
418	pread (fd, readahead_buf, len, offset);	891	pread (fd, aio_buf, len, offset);
419	offset += len;	892	offset += len;
420	count -= len;	893	count -= len;
421	}	894	}
422		895
423	errno = 0;	896	errno = 0;
424	}	897	}
		898
425	#endif	899	#endif
426		900
427	#if !HAVE_READDIR_R	901	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	902	# define readdir_r aio_readdir_r
429		903
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	904	static mutex_t readdirlock = MUTEX_INIT;
431		905
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	906	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	907	{
435	struct dirent *e;	908	struct dirent *e;
436	int errorno;	909	int errorno;
437		910
438	pthread_mutex_lock (&readdirlock);	911	LOCK (readdirlock);
439		912
440	e = readdir (dirp);	913	e = readdir (dirp);
441	errorno = errno;	914	errorno = errno;
442		915
443	if (e)	916	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	919	strcpy (ent->d_name, e->d_name);
447	}	920	}
448	else	921	else
449	*res = 0;	922	*res = 0;
450		923
451	pthread_mutex_unlock (&readdirlock);	924	UNLOCK (readdirlock);
452		925
453	errno = errorno;	926	errno = errorno;
454	return e ? 0 : -1;	927	return e ? 0 : -1;
455	}	928	}
456	#endif	929	#endif
457		930
458	/* sendfile always needs emulation */	931	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	932	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
461	{	933	{
462	ssize_t res;	934	ssize_t res;
463		935
464	if (!count)	936	if (!count)
465	return 0;	937	return 0;
…		…
476	{	948	{
477	off_t sbytes;	949	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	950	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		951
480	if (res < 0 && sbytes)	952	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	953	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	954	res = sbytes;
483	}	955	}
484		956
485	# elif __hpux	957	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	958	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
514	#endif	986	#endif
515	)	987	)
516	)	988	)
517	{	989	{
518	/* emulate sendfile. this is a major pain in the ass */	990	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	991	dBUF;
		992
520	res = 0;	993	res = 0;
521		994
522	while (count)	995	while (count)
523	{	996	{
524	ssize_t cnt;	997	ssize_t cnt;
525		998
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	999	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		1000
528	if (cnt <= 0)	1001	if (cnt <= 0)
529	{	1002	{
530	if (cnt && !res) res = -1;	1003	if (cnt && !res) res = -1;
531	break;	1004	break;
532	}	1005	}
533		1006
534	cnt = write (ofd, buf, cnt);	1007	cnt = write (ofd, aio_buf, cnt);
535		1008
536	if (cnt <= 0)	1009	if (cnt <= 0)
537	{	1010	{
538	if (cnt && !res) res = -1;	1011	if (cnt && !res) res = -1;
539	break;	1012	break;
…		…
547		1020
548	return res;	1021	return res;
549	}	1022	}
550		1023
551	/* read a full directory */	1024	/* read a full directory */
552	static int	1025	static void scandir_ (aio_req req, worker *self)
553	scandir_ (const char *path, void **namesp)
554	{	1026	{
555	DIR *dirp = opendir (path);	1027	DIR *dirp;
556	union	1028	union
557	{	1029	{
558	struct dirent d;	1030	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1031	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;	1032	} *u;
561	struct dirent *entp;	1033	struct dirent *entp;
562	char *name, *names;	1034	char *name, *names;
563	int memlen = 4096;	1035	int memlen = 4096;
564	int memofs = 0;	1036	int memofs = 0;
565	int res = 0;	1037	int res = 0;
566	int errorno;	1038	int errorno;
567		1039
568	if (!dirp)	1040	LOCK (wrklock);
569	return -1;	1041	self->dirp = dirp = opendir (req->ptr1);
570		1042	self->dbuf = u = malloc (sizeof (*u));
		1043	req->flags |= FLAG_PTR2_FREE;
571	names = malloc (memlen);	1044	req->ptr2 = names = malloc (memlen);
		1045	UNLOCK (wrklock);
		1046
		1047	if (dirp && u && names)
		1048	for (;;)
		1049	{
		1050	errno = 0;
		1051	readdir_r (dirp, &u->d, &entp);
		1052
		1053	if (!entp)
		1054	break;
		1055
		1056	name = entp->d_name;
		1057
		1058	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1059	{
		1060	int len = strlen (name) + 1;
		1061
		1062	res++;
		1063
		1064	while (memofs + len > memlen)
		1065	{
		1066	memlen *= 2;
		1067	LOCK (wrklock);
		1068	req->ptr2 = names = realloc (names, memlen);
		1069	UNLOCK (wrklock);
		1070
		1071	if (!names)
		1072	break;
		1073	}
		1074
		1075	memcpy (names + memofs, name, len);
		1076	memofs += len;
		1077	}
		1078	}
		1079
		1080	if (errno)
		1081	res = -1;
		1082
		1083	req->result = res;
		1084	}
		1085
		1086	/*****************************************************************************/
		1087
		1088	static void *aio_proc (void *thr_arg)
		1089	{
		1090	aio_req req;
		1091	struct timespec ts;
		1092	worker *self = (worker *)thr_arg;
		1093
		1094	/* try to distribute timeouts somewhat evenly */
		1095	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1096	* (1000000000UL / 1024UL);
572		1097
573	for (;;)	1098	for (;;)
574	{	1099	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);	1100	ts.tv_sec = time (0) + IDLE_TIMEOUT;
576		1101
577	if (!entp)	1102	LOCK (reqlock);
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626		1103
627	for (;;)	1104	for (;;)
628	{	1105	{
629	req = reqs;	1106	self->req = req = reqq_shift (&req_queue);
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636		1107
637	if (req)	1108	if (req)
638	break;	1109	break;
639		1110
640	pthread_cond_wait (&reqwait, &reqlock);	1111	++idle;
		1112
		1113	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1114	== ETIMEDOUT)
		1115	{
		1116	if (idle > max_idle)
		1117	{
		1118	--idle;
		1119	UNLOCK (reqlock);
		1120	LOCK (wrklock);
		1121	--started;
		1122	UNLOCK (wrklock);
		1123	goto quit;
		1124	}
		1125
		1126	/* we are allowed to idle, so do so without any timeout */
		1127	COND_WAIT (reqwait, reqlock);
		1128	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1129	}
		1130
		1131	--idle;
641	}	1132	}
642		1133
643	pthread_mutex_unlock (&reqlock);	1134	--nready;
		1135
		1136	UNLOCK (reqlock);
644		1137
645	errno = 0; /* strictly unnecessary */	1138	errno = 0; /* strictly unnecessary */
646		1139
647	type = req->type;	1140	if (!(req->flags & FLAG_CANCELLED))
648
649	switch (type)	1141	switch (req->type)
		1142	{
		1143	case REQ_READ: req->result = req->offs >= 0
		1144	? pread (req->int1, req->ptr1, req->size, req->offs)
		1145	: read (req->int1, req->ptr1, req->size); break;
		1146	case REQ_WRITE: req->result = req->offs >= 0
		1147	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1148	: write (req->int1, req->ptr1, req->size); break;
		1149
		1150	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1151	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1152
		1153	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1154	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1155	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1156
		1157	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1158	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1159	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1160	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1161
		1162	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1163	case REQ_CLOSE: req->result = close (req->int1); break;
		1164	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1165	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1166	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1167	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1168	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1169	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1170	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1171	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1172
		1173	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1174	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1175	case REQ_READDIR: scandir_ (req, self); break;
		1176
		1177	case REQ_BUSY:
		1178	{
		1179	struct timeval tv;
		1180
		1181	tv.tv_sec = req->nv1;
		1182	tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
		1183
		1184	req->result = select (0, 0, 0, 0, &tv);
		1185	}
		1186
		1187	case REQ_UTIME:
		1188	case REQ_FUTIME:
		1189	{
		1190	struct timeval tv[2];
		1191	struct timeval *times;
		1192
		1193	if (req->nv1 != -1. || req->nv2 != -1.)
		1194	{
		1195	tv[0].tv_sec = req->nv1;
		1196	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1197	tv[1].tv_sec = req->nv2;
		1198	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1199
		1200	times = tv;
		1201	}
		1202	else
		1203	times = 0;
		1204
		1205
		1206	req->result = req->type == REQ_FUTIME
		1207	? futimes (req->int1, times)
		1208	: utimes (req->ptr1, times);
		1209	}
		1210
		1211	case REQ_GROUP:
		1212	case REQ_NOP:
		1213	break;
		1214
		1215	case REQ_QUIT:
		1216	goto quit;
		1217
		1218	default:
		1219	req->result = -1;
		1220	break;
		1221	}
		1222
		1223	req->errorno = errno;
		1224
		1225	LOCK (reslock);
		1226
		1227	++npending;
		1228
		1229	if (!reqq_push (&res_queue, req))
650	{	1230	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}
690	else
691	{
692	rese = ress = req;
693
694	/* write a dummy byte to the pipe so fh becomes ready */	1231	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);	1232	write (respipe [1], &respipe, 1);
		1233
		1234	/* optionally signal the main thread asynchronously */
		1235	if (main_sig)
		1236	pthread_kill (main_tid, main_sig);
696	}	1237	}
697		1238
698	pthread_mutex_unlock (&reslock);	1239	self->req = 0;
		1240	worker_clear (self);
		1241
		1242	UNLOCK (reslock);
699	}	1243	}
700	while (type != REQ_QUIT);	1244
		1245	quit:
		1246	LOCK (wrklock);
		1247	worker_free (self);
		1248	UNLOCK (wrklock);
701		1249
702	return 0;	1250	return 0;
703	}	1251	}
704		1252
705	/*****************************************************************************/	1253	/*****************************************************************************/
706		1254
707	static void atfork_prepare (void)	1255	static void atfork_prepare (void)
708	{	1256	{
709	pthread_mutex_lock (&reqlock);	1257	LOCK (wrklock);
710	pthread_mutex_lock (&reslock);	1258	LOCK (reqlock);
		1259	LOCK (reslock);
711	#if !HAVE_PREADWRITE	1260	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);	1261	LOCK (preadwritelock);
713	#endif	1262	#endif
714	#if !HAVE_READDIR_R	1263	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);	1264	LOCK (readdirlock);
716	#endif	1265	#endif
717	}	1266	}
718		1267
719	static void atfork_parent (void)	1268	static void atfork_parent (void)
720	{	1269	{
721	#if !HAVE_READDIR_R	1270	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);	1271	UNLOCK (readdirlock);
723	#endif	1272	#endif
724	#if !HAVE_PREADWRITE	1273	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);	1274	UNLOCK (preadwritelock);
726	#endif	1275	#endif
727	pthread_mutex_unlock (&reslock);	1276	UNLOCK (reslock);
728	pthread_mutex_unlock (&reqlock);	1277	UNLOCK (reqlock);
		1278	UNLOCK (wrklock);
729	}	1279	}
730		1280
731	static void atfork_child (void)	1281	static void atfork_child (void)
732	{	1282	{
733	aio_req prv;	1283	aio_req prv;
734		1284
735	started = 0;	1285	while (prv = reqq_shift (&req_queue))
		1286	req_destroy (prv);
736		1287
737	while (reqs)	1288	while (prv = reqq_shift (&res_queue))
		1289	req_destroy (prv);
		1290
		1291	while (wrk_first.next != &wrk_first)
738	{	1292	{
739	prv = reqs;	1293	worker *wrk = wrk_first.next;
740	reqs = prv->next;	1294
741	free_req (prv);	1295	if (wrk->req)
		1296	req_destroy (wrk->req);
		1297
		1298	worker_clear (wrk);
		1299	worker_free (wrk);
742	}	1300	}
743		1301
744	reqs = reqe = 0;	1302	started = 0;
745		1303	idle = 0;
746	while (ress)	1304	nreqs = 0;
747	{	1305	nready = 0;
748	prv = ress;	1306	npending = 0;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754		1307
755	close (respipe [0]);	1308	close (respipe [0]);
756	close (respipe [1]);	1309	close (respipe [1]);
757	create_pipe ();	1310	create_pipe ();
758		1311
759	atfork_parent ();	1312	atfork_parent ();
760	}	1313	}
761		1314
762	#define dREQ \	1315	#define dREQ \
763	aio_req req; \	1316	aio_req req; \
		1317	int req_pri = next_pri; \
		1318	next_pri = DEFAULT_PRI + PRI_BIAS; \
764	\	1319	\
765	if (SvOK (callback) && !SvROK (callback)) \	1320	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \	1321	croak ("callback must be undef or of reference type"); \
767	\	1322	\
768	Newz (0, req, 1, aio_cb); \	1323	Newz (0, req, 1, aio_cb); \
769	if (!req) \	1324	if (!req) \
770	croak ("out of memory during aio_req allocation"); \	1325	croak ("out of memory during aio_req allocation"); \
771	\	1326	\
772	req->callback = newSVsv (callback);	1327	req->callback = newSVsv (callback); \
		1328	req->pri = req_pri
		1329
		1330	#define REQ_SEND \
		1331	req_send (req); \
		1332	\
		1333	if (GIMME_V != G_VOID) \
		1334	XPUSHs (req_sv (req, AIO_REQ_KLASS));
773		1335
774	MODULE = IO::AIO PACKAGE = IO::AIO	1336	MODULE = IO::AIO PACKAGE = IO::AIO
775		1337
776	PROTOTYPES: ENABLE	1338	PROTOTYPES: ENABLE
777		1339
778	BOOT:	1340	BOOT:
779	{	1341	{
		1342	HV *stash = gv_stashpv ("IO::AIO", 1);
		1343
		1344	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1345	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1346	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1347	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1348	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1349	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1350	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1351
780	create_pipe ();	1352	create_pipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1353	ATFORK (atfork_prepare, atfork_parent, atfork_child);
782	}	1354	}
783		1355
784	void	1356	void
785	min_parallel(nthreads)	1357	max_poll_reqs (int nreqs)
786	int nthreads
787	PROTOTYPE: $	1358	PROTOTYPE: $
		1359	CODE:
		1360	max_poll_reqs = nreqs;
788		1361
789	void	1362	void
790	max_parallel(nthreads)	1363	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	1364	PROTOTYPE: $
		1365	CODE:
		1366	max_poll_time = nseconds * AIO_TICKS;
		1367
		1368	void
		1369	min_parallel (int nthreads)
		1370	PROTOTYPE: $
		1371
		1372	void
		1373	max_parallel (int nthreads)
		1374	PROTOTYPE: $
		1375
		1376	void
		1377	max_idle (int nthreads)
		1378	PROTOTYPE: $
		1379	CODE:
		1380	set_max_idle (nthreads);
793		1381
794	int	1382	int
795	max_outstanding(nreqs)	1383	max_outstanding (int maxreqs)
796	int nreqs	1384	PROTOTYPE: $
797	PROTOTYPE: $
798	CODE:	1385	CODE:
799	RETVAL = max_outstanding;	1386	RETVAL = max_outstanding;
800	max_outstanding = nreqs;	1387	max_outstanding = maxreqs;
		1388	OUTPUT:
		1389	RETVAL
801		1390
802	void	1391	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1392	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
804	SV * pathname
805	int flags
806	int mode
807	SV * callback
808	PROTOTYPE: $$$;$	1393	PROTOTYPE: $$$;$
809	CODE:	1394	PPCODE:
810	{	1395	{
811	dREQ;	1396	dREQ;
812		1397
813	req->type = REQ_OPEN;	1398	req->type = REQ_OPEN;
814	req->data = newSVsv (pathname);	1399	req->sv1 = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	1400	req->ptr1 = SvPVbyte_nolen (req->sv1);
816	req->fd = flags;	1401	req->int1 = flags;
817	req->mode = mode;	1402	req->mode = mode;
818		1403
819	send_req (req);	1404	REQ_SEND;
820	}	1405	}
821		1406
822	void	1407	void
823	aio_close(fh,callback=&PL_sv_undef)	1408	aio_close (SV *fh, SV *callback=&PL_sv_undef)
824	SV * fh
825	SV * callback
826	PROTOTYPE: $;$	1409	PROTOTYPE: $;$
827	ALIAS:	1410	ALIAS:
828	aio_close = REQ_CLOSE	1411	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1412	aio_fsync = REQ_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1413	aio_fdatasync = REQ_FDATASYNC
831	CODE:	1414	PPCODE:
832	{	1415	{
833	dREQ;	1416	dREQ;
834		1417
835	req->type = ix;	1418	req->type = ix;
836	req->fh = newSVsv (fh);	1419	req->sv1 = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1420	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
838		1421
839	send_req (req);	1422	REQ_SEND (req);
840	}	1423	}
841		1424
842	void	1425	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1426	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
844	SV * fh
845	UV offset
846	UV length
847	SV * data
848	UV dataoffset
849	SV * callback
850	ALIAS:	1427	ALIAS:
851	aio_read = REQ_READ	1428	aio_read = REQ_READ
852	aio_write = REQ_WRITE	1429	aio_write = REQ_WRITE
853	PROTOTYPE: $$$$$;$	1430	PROTOTYPE: $$$$$;$
854	CODE:	1431	PPCODE:
855	{	1432	{
856	aio_req req;
857	STRLEN svlen;	1433	STRLEN svlen;
858	char *svptr = SvPVbyte (data, svlen);	1434	char *svptr = SvPVbyte (data, svlen);
		1435	UV len = SvUV (length);
859		1436
860	SvUPGRADE (data, SVt_PV);	1437	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);	1438	SvPOK_on (data);
862		1439
863	if (dataoffset < 0)	1440	if (dataoffset < 0)
864	dataoffset += svlen;	1441	dataoffset += svlen;
865		1442
866	if (dataoffset < 0 || dataoffset > svlen)	1443	if (dataoffset < 0 || dataoffset > svlen)
867	croak ("data offset outside of string");	1444	croak ("dataoffset outside of data scalar");
868		1445
869	if (ix == REQ_WRITE)	1446	if (ix == REQ_WRITE)
870	{	1447	{
871	/* write: check length and adjust. */	1448	/* write: check length and adjust. */
872	if (length < 0 || length + dataoffset > svlen)	1449	if (!SvOK (length) || len + dataoffset > svlen)
873	length = svlen - dataoffset;	1450	len = svlen - dataoffset;
874	}	1451	}
875	else	1452	else
876	{	1453	{
877	/* read: grow scalar as necessary */	1454	/* read: grow scalar as necessary */
878	svptr = SvGROW (data, length + dataoffset);	1455	svptr = SvGROW (data, len + dataoffset + 1);
879	}	1456	}
880		1457
881	if (length < 0)	1458	if (len < 0)
882	croak ("length must not be negative");	1459	croak ("length must not be negative");
883		1460
884	{	1461	{
885	dREQ;	1462	dREQ;
886		1463
887	req->type = ix;	1464	req->type = ix;
888	req->fh = newSVsv (fh);	1465	req->sv1 = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1466	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
890	: IoOFP (sv_2io (fh)));	1467	: IoOFP (sv_2io (fh)));
		1468	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
891	req->offset = offset;	1469	req->size = len;
892	req->length = length;
893	req->data = SvREFCNT_inc (data);	1470	req->sv2 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	1471	req->ptr1 = (char *)svptr + dataoffset;
		1472	req->stroffset = dataoffset;
895		1473
896	if (!SvREADONLY (data))	1474	if (!SvREADONLY (data))
897	{	1475	{
898	SvREADONLY_on (data);	1476	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1477	req->flags |= FLAG_SV2_RO_OFF;
900	}	1478	}
901		1479
902	send_req (req);	1480	REQ_SEND;
903	}	1481	}
904	}	1482	}
905		1483
906	void	1484	void
		1485	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1486	PROTOTYPE: $$;$
		1487	PPCODE:
		1488	{
		1489	SV *data;
		1490	dREQ;
		1491
		1492	data = newSV (NAME_MAX);
		1493	SvPOK_on (data);
		1494
		1495	req->type = REQ_READLINK;
		1496	req->sv1 = newSVsv (path);
		1497	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1498	req->sv2 = data;
		1499	req->ptr1 = SvPVbyte_nolen (data);
		1500
		1501	REQ_SEND;
		1502	}
		1503
		1504	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1505	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
908	SV * out_fh
909	SV * in_fh
910	UV in_offset
911	UV length
912	SV * callback
913	PROTOTYPE: $$$$;$	1506	PROTOTYPE: $$$$;$
914	CODE:	1507	PPCODE:
915	{	1508	{
916	dREQ;	1509	dREQ;
917		1510
918	req->type = REQ_SENDFILE;	1511	req->type = REQ_SENDFILE;
919	req->fh = newSVsv (out_fh);	1512	req->sv1 = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
921	req->fh2 = newSVsv (in_fh);	1514	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1515	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
923	req->offset = in_offset;	1516	req->offs = SvVAL64 (in_offset);
924	req->length = length;	1517	req->size = length;
925		1518
926	send_req (req);	1519	REQ_SEND;
927	}	1520	}
928		1521
929	void	1522	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1523	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
931	SV * fh
932	UV offset
933	IV length
934	SV * callback
935	PROTOTYPE: $$$;$	1524	PROTOTYPE: $$$;$
936	CODE:	1525	PPCODE:
937	{	1526	{
938	dREQ;	1527	dREQ;
939		1528
940	req->type = REQ_READAHEAD;	1529	req->type = REQ_READAHEAD;
941	req->fh = newSVsv (fh);	1530	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1531	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
943	req->offset = offset;	1532	req->offs = SvVAL64 (offset);
944	req->length = length;	1533	req->size = length;
945		1534
946	send_req (req);	1535	REQ_SEND;
947	}	1536	}
948		1537
949	void	1538	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1539	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
951	SV * fh_or_path
952	SV * callback
953	ALIAS:	1540	ALIAS:
954	aio_stat = REQ_STAT	1541	aio_stat = REQ_STAT
955	aio_lstat = REQ_LSTAT	1542	aio_lstat = REQ_LSTAT
956	CODE:	1543	PPCODE:
957	{	1544	{
958	dREQ;	1545	dREQ;
959		1546
960	New (0, req->statdata, 1, Stat_t);	1547	req->ptr2 = malloc (sizeof (Stat_t));
961	if (!req->statdata)	1548	if (!req->ptr2)
962	{	1549	{
963	free_req (req);	1550	req_destroy (req);
964	croak ("out of memory during aio_req->statdata allocation");	1551	croak ("out of memory during aio_stat statdata allocation");
965	}	1552	}
		1553
		1554	req->flags |= FLAG_PTR2_FREE;
		1555	req->sv1 = newSVsv (fh_or_path);
966		1556
967	if (SvPOK (fh_or_path))	1557	if (SvPOK (fh_or_path))
968	{	1558	{
969	req->type = ix;	1559	req->type = ix;
970	req->data = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);	1560	req->ptr1 = SvPVbyte_nolen (req->sv1);
972	}	1561	}
973	else	1562	else
974	{	1563	{
975	req->type = REQ_FSTAT;	1564	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1565	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}	1566	}
979		1567
980	send_req (req);	1568	REQ_SEND;
981	}	1569	}
982		1570
983	void	1571	void
		1572	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1573	PPCODE:
		1574	{
		1575	dREQ;
		1576
		1577	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1578	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1579	req->sv1 = newSVsv (fh_or_path);
		1580
		1581	if (SvPOK (fh_or_path))
		1582	{
		1583	req->type = REQ_UTIME;
		1584	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1585	}
		1586	else
		1587	{
		1588	req->type = REQ_FUTIME;
		1589	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1590	}
		1591
		1592	REQ_SEND;
		1593	}
		1594
		1595	void
		1596	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1597	PPCODE:
		1598	{
		1599	dREQ;
		1600
		1601	req->mode = mode;
		1602	req->sv1 = newSVsv (fh_or_path);
		1603
		1604	if (SvPOK (fh_or_path))
		1605	{
		1606	req->type = REQ_CHMOD;
		1607	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1608	}
		1609	else
		1610	{
		1611	req->type = REQ_FCHMOD;
		1612	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1613	}
		1614
		1615	REQ_SEND;
		1616	}
		1617
		1618	void
		1619	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1620	PPCODE:
		1621	{
		1622	dREQ;
		1623
		1624	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1625	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1626	req->sv1 = newSVsv (fh_or_path);
		1627
		1628	if (SvPOK (fh_or_path))
		1629	{
		1630	req->type = REQ_CHOWN;
		1631	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1632	}
		1633	else
		1634	{
		1635	req->type = REQ_FCHOWN;
		1636	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1637	}
		1638
		1639	REQ_SEND;
		1640	}
		1641
		1642	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1643	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
985	SV * pathname
986	SV * callback
987	ALIAS:	1644	ALIAS:
988	aio_unlink = REQ_UNLINK	1645	aio_unlink = REQ_UNLINK
989	aio_rmdir = REQ_RMDIR	1646	aio_rmdir = REQ_RMDIR
		1647	aio_readdir = REQ_READDIR
990	CODE:	1648	PPCODE:
991	{	1649	{
992	dREQ;	1650	dREQ;
993		1651
994	req->type = ix;	1652	req->type = ix;
995	req->data = newSVsv (pathname);	1653	req->sv1 = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	1654	req->ptr1 = SvPVbyte_nolen (req->sv1);
997
998	send_req (req);
999	}
1000		1655
		1656	REQ_SEND;
		1657	}
		1658
1001	void	1659	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1660	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
1003	SV * oldpath
1004	SV * newpath
1005	SV * callback
1006	CODE:	1661	PPCODE:
1007	{	1662	{
1008	dREQ;	1663	dREQ;
1009		1664
1010	req->type = REQ_SYMLINK;	1665	req->type = REQ_MKDIR;
1011	req->fh = newSVsv (oldpath);	1666	req->sv1 = newSVsv (pathname);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1667	req->ptr1 = SvPVbyte_nolen (req->sv1);
1013	req->data = newSVsv (newpath);	1668	req->mode = mode;
1014	req->dataptr = SvPVbyte_nolen (req->data);
1015
1016	send_req (req);
1017	}
1018		1669
		1670	REQ_SEND;
		1671	}
		1672
1019	void	1673	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1674	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1021	SV * pathname	1675	ALIAS:
1022	SV * callback	1676	aio_link = REQ_LINK
		1677	aio_symlink = REQ_SYMLINK
		1678	aio_rename = REQ_RENAME
1023	CODE:	1679	PPCODE:
1024	{	1680	{
1025	dREQ;	1681	dREQ;
1026		1682
1027	req->type = REQ_READDIR;	1683	req->type = ix;
1028	req->data = newSVsv (pathname);	1684	req->sv2 = newSVsv (oldpath);
1029	req->dataptr = SvPVbyte_nolen (req->data);	1685	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1686	req->sv1 = newSVsv (newpath);
		1687	req->ptr1 = SvPVbyte_nolen (req->sv1);
1030		1688
1031	send_req (req);	1689	REQ_SEND;
1032	}	1690	}
1033		1691
1034	void	1692	void
		1693	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1694	PPCODE:
		1695	{
		1696	dREQ;
		1697
		1698	req->type = REQ_MKNOD;
		1699	req->sv1 = newSVsv (pathname);
		1700	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1701	req->mode = (mode_t)mode;
		1702	req->offs = dev;
		1703
		1704	REQ_SEND;
		1705	}
		1706
		1707	void
		1708	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1709	PPCODE:
		1710	{
		1711	dREQ;
		1712
		1713	req->type = REQ_BUSY;
		1714	req->nv1 = delay < 0. ? 0. : delay;
		1715
		1716	REQ_SEND;
		1717	}
		1718
		1719	void
		1720	aio_group (SV *callback=&PL_sv_undef)
		1721	PROTOTYPE: ;$
		1722	PPCODE:
		1723	{
		1724	dREQ;
		1725
		1726	req->type = REQ_GROUP;
		1727
		1728	req_send (req);
		1729	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1730	}
		1731
		1732	void
		1733	aio_nop (SV *callback=&PL_sv_undef)
		1734	PPCODE:
		1735	{
		1736	dREQ;
		1737
		1738	req->type = REQ_NOP;
		1739
		1740	REQ_SEND;
		1741	}
		1742
		1743	int
		1744	aioreq_pri (int pri = 0)
		1745	PROTOTYPE: ;$
		1746	CODE:
		1747	RETVAL = next_pri - PRI_BIAS;
		1748	if (items > 0)
		1749	{
		1750	if (pri < PRI_MIN) pri = PRI_MIN;
		1751	if (pri > PRI_MAX) pri = PRI_MAX;
		1752	next_pri = pri + PRI_BIAS;
		1753	}
		1754	OUTPUT:
		1755	RETVAL
		1756
		1757	void
		1758	aioreq_nice (int nice = 0)
		1759	CODE:
		1760	nice = next_pri - nice;
		1761	if (nice < PRI_MIN) nice = PRI_MIN;
		1762	if (nice > PRI_MAX) nice = PRI_MAX;
		1763	next_pri = nice + PRI_BIAS;
		1764
		1765	void
1035	flush()	1766	flush ()
1036	PROTOTYPE:	1767	PROTOTYPE:
1037	CODE:	1768	CODE:
1038	while (nreqs)	1769	while (nreqs)
1039	{	1770	{
1040	poll_wait ();	1771	poll_wait ();
1041	poll_cb ();	1772	poll_cb ();
1042	}	1773	}
1043		1774
1044	void	1775	int
1045	poll()	1776	poll()
1046	PROTOTYPE:	1777	PROTOTYPE:
1047	CODE:	1778	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1779	poll_wait ();
1051	poll_cb ();	1780	RETVAL = poll_cb ();
1052	}	1781	OUTPUT:
		1782	RETVAL
1053		1783
1054	int	1784	int
1055	poll_fileno()	1785	poll_fileno()
1056	PROTOTYPE:	1786	PROTOTYPE:
1057	CODE:	1787	CODE:
…		…
1069		1799
1070	void	1800	void
1071	poll_wait()	1801	poll_wait()
1072	PROTOTYPE:	1802	PROTOTYPE:
1073	CODE:	1803	CODE:
1074	if (nreqs)
1075	poll_wait ();	1804	poll_wait ();
		1805
		1806	void
		1807	setsig (int signum = SIGIO)
		1808	PROTOTYPE: ;$
		1809	CODE:
		1810	{
		1811	if (block_sig_level)
		1812	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1813
		1814	LOCK (reslock);
		1815	main_tid = pthread_self ();
		1816	main_sig = signum;
		1817	UNLOCK (reslock);
		1818
		1819	if (main_sig && npending)
		1820	pthread_kill (main_tid, main_sig);
		1821	}
		1822
		1823	void
		1824	aio_block (SV *cb)
		1825	PROTOTYPE: &
		1826	PPCODE:
		1827	{
		1828	int count;
		1829
		1830	block_sig ();
		1831	PUSHMARK (SP);
		1832	PUTBACK;
		1833	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1834	SPAGAIN;
		1835	unblock_sig ();
		1836
		1837	if (SvTRUE (ERRSV))
		1838	croak (0);
		1839
		1840	XSRETURN (count);
		1841	}
1076		1842
1077	int	1843	int
1078	nreqs()	1844	nreqs()
1079	PROTOTYPE:	1845	PROTOTYPE:
1080	CODE:	1846	CODE:
1081	RETVAL = nreqs;	1847	RETVAL = nreqs;
1082	OUTPUT:	1848	OUTPUT:
1083	RETVAL	1849	RETVAL
1084		1850
		1851	int
		1852	nready()
		1853	PROTOTYPE:
		1854	CODE:
		1855	RETVAL = get_nready ();
		1856	OUTPUT:
		1857	RETVAL
		1858
		1859	int
		1860	npending()
		1861	PROTOTYPE:
		1862	CODE:
		1863	RETVAL = get_npending ();
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	int
		1868	nthreads()
		1869	PROTOTYPE:
		1870	CODE:
		1871	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1872	RETVAL = started;
		1873	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1874	OUTPUT:
		1875	RETVAL
		1876
		1877	PROTOTYPES: DISABLE
		1878
		1879	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1880
		1881	void
		1882	cancel (aio_req_ornot req)
		1883	CODE:
		1884	req_cancel (req);
		1885
		1886	void
		1887	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1888	CODE:
		1889	SvREFCNT_dec (req->callback);
		1890	req->callback = newSVsv (callback);
		1891
		1892	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1893
		1894	void
		1895	add (aio_req grp, ...)
		1896	PPCODE:
		1897	{
		1898	int i;
		1899	aio_req req;
		1900
		1901	if (main_sig && !block_sig_level)
		1902	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1903
		1904	if (grp->int1 == 2)
		1905	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1906
		1907	for (i = 1; i < items; ++i )
		1908	{
		1909	if (GIMME_V != G_VOID)
		1910	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1911
		1912	req = SvAIO_REQ (ST (i));
		1913
		1914	if (req)
		1915	{
		1916	++grp->size;
		1917	req->grp = grp;
		1918
		1919	req->grp_prev = 0;
		1920	req->grp_next = grp->grp_first;
		1921
		1922	if (grp->grp_first)
		1923	grp->grp_first->grp_prev = req;
		1924
		1925	grp->grp_first = req;
		1926	}
		1927	}
		1928	}
		1929
		1930	void
		1931	cancel_subs (aio_req_ornot req)
		1932	CODE:
		1933	req_cancel_subs (req);
		1934
		1935	void
		1936	result (aio_req grp, ...)
		1937	CODE:
		1938	{
		1939	int i;
		1940	AV *av;
		1941
		1942	grp->errorno = errno;
		1943
		1944	av = newAV ();
		1945
		1946	for (i = 1; i < items; ++i )
		1947	av_push (av, newSVsv (ST (i)));
		1948
		1949	SvREFCNT_dec (grp->sv1);
		1950	grp->sv1 = (SV *)av;
		1951	}
		1952
		1953	void
		1954	errno (aio_req grp, int errorno = errno)
		1955	CODE:
		1956	grp->errorno = errorno;
		1957
		1958	void
		1959	limit (aio_req grp, int limit)
		1960	CODE:
		1961	grp->int2 = limit;
		1962	aio_grp_feed (grp);
		1963
		1964	void
		1965	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1966	CODE:
		1967	{
		1968	SvREFCNT_dec (grp->sv2);
		1969	grp->sv2 = newSVsv (callback);
		1970
		1971	if (grp->int2 <= 0)
		1972	grp->int2 = 2;
		1973
		1974	aio_grp_feed (grp);
		1975	}
		1976

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