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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 UTC vs.
Revision 1.103 by root, Sun Jul 8 09:09:34 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
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
13	#include <sys/types.h>	12	#include <sys/types.h>
14	#include <sys/stat.h>	13	#include <sys/stat.h>
15	#include <limits.h>	14	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	15	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	16	#include <sched.h>
		17
		18	#ifdef _WIN32
		19
		20	# define SIGIO 0
		21	typedef Direntry_t X_DIRENT;
		22	#undef malloc
		23	#undef free
		24
		25	// perl overrides all those nice win32 functions
		26	# undef open
		27	# undef read
		28	# undef write
		29	# undef stat
		30	# undef fstat
		31	# define lstat stat
		32	# undef truncate
		33	# undef ftruncate
		34	# undef open
		35	# undef close
		36	# undef unlink
		37	# undef rmdir
		38	# undef rename
		39	# undef lseek
		40
		41	# define chown(a,b,c) (errno = ENOSYS, -1)
		42	# define fchown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchmod(a,b) (errno = ENOSYS, -1)
		44	# define symlink(a,b) (errno = ENOSYS, -1)
		45	# define readlink(a,b,c) (errno = ENOSYS, -1)
		46	# define mknod(a,b,c) (errno = ENOSYS, -1)
		47	# define truncate(a,b) (errno = ENOSYS, -1)
		48	# define ftruncate(fd,o) chsize ((fd), (o))
		49	# define fsync(fd) _commit (fd)
		50	# define opendir(fd) (errno = ENOSYS, 0)
		51	# define readdir(fd) (errno = ENOSYS, -1)
		52	# define closedir(fd) (errno = ENOSYS, -1)
		53	# define mkdir(a,b) mkdir (a)
		54
		55	#else
		56
		57	# include "autoconf/config.h"
		58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	typedef struct dirent X_DIRENT;
		64
		65	#endif
20		66
21	#if HAVE_SENDFILE	67	#if HAVE_SENDFILE
22	# if __linux	68	# if __linux
23	# include <sys/sendfile.h>	69	# include <sys/sendfile.h>
24	# elif __freebsd	70	# elif __freebsd
…		…
31	# else	77	# else
32	# error sendfile support requested but not available	78	# error sendfile support requested but not available
33	# endif	79	# endif
34	#endif	80	#endif
35		81
36	#if __ia64	82	/* number of seconds after which idle threads exit */
		83	#define IDLE_TIMEOUT 10
		84
		85	/* used for struct dirent, AIX doesn't provide it */
		86	#ifndef NAME_MAX
		87	# define NAME_MAX 4096
		88	#endif
		89
		90	/* buffer size for various temporary buffers */
37	# define STACKSIZE 65536	91	#define AIO_BUFSIZE 65536
		92
		93	/* use NV for 32 bit perls as it allows larger offsets */
		94	#if IVSIZE >= 8
		95	# define SvVAL64 SvIV
38	#else	96	#else
39	# define STACKSIZE 8192	97	# define SvVAL64 SvNV
40	#endif	98	#endif
		99
		100	#define dBUF \
		101	char *aio_buf; \
		102	X_LOCK (wrklock); \
		103	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		104	X_UNLOCK (wrklock); \
		105	if (!aio_buf) \
		106	return -1;
		107
		108	typedef SV SV8; /* byte-sv, used for argument-checking */
41		109
42	enum {	110	enum {
43	REQ_QUIT,	111	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	112	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	113	REQ_READ, REQ_WRITE,
46	REQ_SENDFILE,	114	REQ_READAHEAD, REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	115	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		116	REQ_TRUNCATE, REQ_FTRUNCATE,
		117	REQ_UTIME, REQ_FUTIME,
		118	REQ_CHMOD, REQ_FCHMOD,
		119	REQ_CHOWN, REQ_FCHOWN,
48	REQ_FSYNC, REQ_FDATASYNC,	120	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	121	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
50	REQ_READDIR,	122	REQ_MKNOD, REQ_READDIR,
51	REQ_SYMLINK,	123	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		124	REQ_GROUP, REQ_NOP,
		125	REQ_BUSY,
52	};	126	};
53		127
		128	#define AIO_REQ_KLASS "IO::AIO::REQ"
		129	#define AIO_GRP_KLASS "IO::AIO::GRP"
		130
54	typedef struct aio_cb {	131	typedef struct aio_cb
		132	{
55	struct aio_cb *volatile next;	133	struct aio_cb *volatile next;
56		134
		135	SV *callback;
		136	SV *sv1, *sv2;
		137	void *ptr1, *ptr2;
		138	off_t offs;
		139	size_t size;
		140	ssize_t result;
		141	double nv1, nv2;
		142
		143	STRLEN stroffset;
57	int type;	144	int type;
58		145	int int1, int2, int3;
59	/* should receive a cleanup, with unions */	146	int errorno;
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */	147	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		148
71	Stat_t *statdata;	149	unsigned char flags;
		150	unsigned char pri;
		151
		152	SV *self; /* the perl counterpart of this request, if any */
		153	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72	} aio_cb;	154	} aio_cb;
73		155
		156	enum {
		157	FLAG_CANCELLED = 0x01, /* request was cancelled */
		158	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		159	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		160	};
		161
74	typedef aio_cb *aio_req;	162	typedef aio_cb *aio_req;
		163	typedef aio_cb *aio_req_ornot;
75		164
		165	enum {
		166	PRI_MIN = -4,
		167	PRI_MAX = 4,
		168
		169	DEFAULT_PRI = 0,
		170	PRI_BIAS = -PRI_MIN,
		171	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		172	};
		173
		174	#define AIO_TICKS ((1000000 + 1023) >> 10)
		175
		176	static unsigned int max_poll_time = 0;
		177	static unsigned int max_poll_reqs = 0;
		178
		179	/* calculcate time difference in ~1/AIO_TICKS of a second */
		180	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		181	{
		182	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		183	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		184	}
		185
		186	static thread_t main_tid;
		187	static int main_sig;
		188	static int block_sig_level;
		189
		190	void block_sig ()
		191	{
		192	sigset_t ss;
		193
		194	if (block_sig_level++)
		195	return;
		196
		197	if (!main_sig)
		198	return;
		199
		200	sigemptyset (&ss);
		201	sigaddset (&ss, main_sig);
		202	pthread_sigmask (SIG_BLOCK, &ss, 0);
		203	}
		204
		205	void unblock_sig ()
		206	{
		207	sigset_t ss;
		208
		209	if (--block_sig_level)
		210	return;
		211
		212	if (!main_sig)
		213	return;
		214
		215	sigemptyset (&ss);
		216	sigaddset (&ss, main_sig);
		217	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		218	}
		219
		220	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		221
76	static int started, wanted;	222	static unsigned int started, idle, wanted;
77	static volatile int nreqs;	223
78	static int max_outstanding = 1<<30;	224	/* worker threads management */
		225	static mutex_t wrklock = X_MUTEX_INIT;
		226
		227	typedef struct worker {
		228	/* locked by wrklock */
		229	struct worker *prev, *next;
		230
		231	thread_t tid;
		232
		233	/* locked by reslock, reqlock or wrklock */
		234	aio_req req; /* currently processed request */
		235	void *dbuf;
		236	DIR *dirp;
		237	} worker;
		238
		239	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		240
		241	static void worker_clear (worker *wrk)
		242	{
		243	if (wrk->dirp)
		244	{
		245	closedir (wrk->dirp);
		246	wrk->dirp = 0;
		247	}
		248
		249	if (wrk->dbuf)
		250	{
		251	free (wrk->dbuf);
		252	wrk->dbuf = 0;
		253	}
		254	}
		255
		256	static void worker_free (worker *wrk)
		257	{
		258	wrk->next->prev = wrk->prev;
		259	wrk->prev->next = wrk->next;
		260
		261	free (wrk);
		262	}
		263
		264	static volatile unsigned int nreqs, nready, npending;
		265	static volatile unsigned int max_idle = 4;
		266	static volatile unsigned int max_outstanding = 0xffffffff;
79	static int respipe [2];	267	static int respipe [2];
80		268
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	269	static mutex_t reslock = X_MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	270	static mutex_t reqlock = X_MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	271	static cond_t reqwait = X_COND_INIT;
84		272
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	273	#if WORDACCESS_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		274
		275	static unsigned int get_nready ()
		276	{
		277	unsigned int retval;
		278
		279	X_LOCK (reqlock);
		280	retval = nready;
		281	X_UNLOCK (reqlock);
		282
		283	return retval;
		284	}
		285
		286	static unsigned int get_npending ()
		287	{
		288	unsigned int retval;
		289
		290	X_LOCK (reslock);
		291	retval = npending;
		292	X_UNLOCK (reslock);
		293
		294	return retval;
		295	}
		296
		297	static unsigned int get_nthreads ()
		298	{
		299	unsigned int retval;
		300
		301	X_LOCK (wrklock);
		302	retval = started;
		303	X_UNLOCK (wrklock);
		304
		305	return retval;
		306	}
		307
		308	#else
		309
		310	# define get_nready() nready
		311	# define get_npending() npending
		312	# define get_nthreads() started
		313
		314	#endif
		315
		316	/*
		317	* a somewhat faster data structure might be nice, but
		318	* with 8 priorities this actually needs <20 insns
		319	* per shift, the most expensive operation.
		320	*/
		321	typedef struct {
		322	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		323	int size;
		324	} reqq;
		325
		326	static reqq req_queue;
		327	static reqq res_queue;
		328
		329	int reqq_push (reqq *q, aio_req req)
		330	{
		331	int pri = req->pri;
		332	req->next = 0;
		333
		334	if (q->qe[pri])
		335	{
		336	q->qe[pri]->next = req;
		337	q->qe[pri] = req;
		338	}
		339	else
		340	q->qe[pri] = q->qs[pri] = req;
		341
		342	return q->size++;
		343	}
		344
		345	aio_req reqq_shift (reqq *q)
		346	{
		347	int pri;
		348
		349	if (!q->size)
		350	return 0;
		351
		352	--q->size;
		353
		354	for (pri = NUM_PRI; pri--; )
		355	{
		356	aio_req req = q->qs[pri];
		357
		358	if (req)
		359	{
		360	if (!(q->qs[pri] = req->next))
		361	q->qe[pri] = 0;
		362
		363	return req;
		364	}
		365	}
		366
		367	abort ();
		368	}
		369
		370	static int poll_cb ();
		371	static int req_invoke (aio_req req);
		372	static void req_destroy (aio_req req);
88	static void free_req (aio_req req)	373	static void req_cancel (aio_req req);
		374
		375	/* must be called at most once */
		376	static SV *req_sv (aio_req req, const char *klass)
89	{	377	{
		378	if (!req->self)
		379	{
		380	req->self = (SV *)newHV ();
		381	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		382	}
		383
		384	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		385	}
		386
		387	static aio_req SvAIO_REQ (SV *sv)
		388	{
		389	MAGIC *mg;
		390
		391	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		392	croak ("object of class " AIO_REQ_KLASS " expected");
		393
		394	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		395
		396	return mg ? (aio_req)mg->mg_ptr : 0;
		397	}
		398
		399	static void aio_grp_feed (aio_req grp)
		400	{
		401	block_sig ();
		402
		403	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		404	{
		405	int old_len = grp->size;
		406
		407	if (grp->sv2 && SvOK (grp->sv2))
		408	{
		409	dSP;
		410
		411	ENTER;
		412	SAVETMPS;
		413	PUSHMARK (SP);
		414	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		415	PUTBACK;
		416	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		417	SPAGAIN;
		418	FREETMPS;
		419	LEAVE;
		420	}
		421
		422	/* stop if no progress has been made */
		423	if (old_len == grp->size)
		424	{
		425	SvREFCNT_dec (grp->sv2);
		426	grp->sv2 = 0;
		427	break;
		428	}
		429	}
		430
		431	unblock_sig ();
		432	}
		433
		434	static void aio_grp_dec (aio_req grp)
		435	{
		436	--grp->size;
		437
		438	/* call feeder, if applicable */
		439	aio_grp_feed (grp);
		440
		441	/* finish, if done */
		442	if (!grp->size && grp->int1)
		443	{
		444	block_sig ();
		445
		446	if (!req_invoke (grp))
		447	{
		448	req_destroy (grp);
		449	unblock_sig ();
		450	croak (0);
		451	}
		452
		453	req_destroy (grp);
		454	unblock_sig ();
		455	}
		456	}
		457
		458	static int req_invoke (aio_req req)
		459	{
		460	dSP;
		461
		462	if (req->flags & FLAG_SV2_RO_OFF)
		463	SvREADONLY_off (req->sv2);
		464
		465	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		466	{
		467	ENTER;
		468	SAVETMPS;
		469	PUSHMARK (SP);
		470	EXTEND (SP, 1);
		471
		472	switch (req->type)
		473	{
		474	case REQ_READDIR:
		475	{
		476	SV *rv = &PL_sv_undef;
		477
		478	if (req->result >= 0)
		479	{
		480	int i;
		481	char *buf = req->ptr2;
		482	AV *av = newAV ();
		483
		484	av_extend (av, req->result - 1);
		485
		486	for (i = 0; i < req->result; ++i)
		487	{
		488	SV *sv = newSVpv (buf, 0);
		489
		490	av_store (av, i, sv);
		491	buf += SvCUR (sv) + 1;
		492	}
		493
		494	rv = sv_2mortal (newRV_noinc ((SV *)av));
		495	}
		496
		497	PUSHs (rv);
		498	}
		499	break;
		500
		501	case REQ_OPEN:
		502	{
		503	/* convert fd to fh */
		504	SV *fh;
		505
		506	PUSHs (sv_2mortal (newSViv (req->result)));
		507	PUTBACK;
		508	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		509	SPAGAIN;
		510
		511	fh = POPs;
		512	PUSHMARK (SP);
		513	XPUSHs (fh);
		514	}
		515	break;
		516
		517	case REQ_GROUP:
		518	req->int1 = 2; /* mark group as finished */
		519
		520	if (req->sv1)
		521	{
		522	int i;
		523	AV *av = (AV *)req->sv1;
		524
		525	EXTEND (SP, AvFILL (av) + 1);
		526	for (i = 0; i <= AvFILL (av); ++i)
		527	PUSHs (*av_fetch (av, i, 0));
		528	}
		529	break;
		530
		531	case REQ_NOP:
		532	case REQ_BUSY:
		533	break;
		534
		535	case REQ_READLINK:
		536	if (req->result > 0)
		537	{
		538	SvCUR_set (req->sv2, req->result);
		539	*SvEND (req->sv2) = 0;
		540	PUSHs (req->sv2);
		541	}
		542	break;
		543
		544	case REQ_STAT:
		545	case REQ_LSTAT:
		546	case REQ_FSTAT:
		547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		548	PL_laststatval = req->result;
		549	PL_statcache = *(Stat_t *)(req->ptr2);
		550	PUSHs (sv_2mortal (newSViv (req->result)));
		551	break;
		552
		553	case REQ_READ:
		554	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		555	*SvEND (req->sv2) = 0;
		556	PUSHs (sv_2mortal (newSViv (req->result)));
		557	break;
		558
		559	default:
		560	PUSHs (sv_2mortal (newSViv (req->result)));
		561	break;
		562	}
		563
		564	errno = req->errorno;
		565
		566	PUTBACK;
		567	call_sv (req->callback, G_VOID | G_EVAL);
		568	SPAGAIN;
		569
		570	FREETMPS;
		571	LEAVE;
		572	}
		573
90	if (req->data)	574	if (req->grp)
91	SvREFCNT_dec (req->data);	575	{
		576	aio_req grp = req->grp;
92		577
		578	/* unlink request */
		579	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		580	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		581
		582	if (grp->grp_first == req)
		583	grp->grp_first = req->grp_next;
		584
		585	aio_grp_dec (grp);
		586	}
		587
		588	return !SvTRUE (ERRSV);
		589	}
		590
		591	static void req_destroy (aio_req req)
		592	{
93	if (req->fh)	593	if (req->self)
		594	{
		595	sv_unmagic (req->self, PERL_MAGIC_ext);
94	SvREFCNT_dec (req->fh);	596	SvREFCNT_dec (req->self);
		597	}
95		598
96	if (req->fh2)	599	SvREFCNT_dec (req->sv1);
97	SvREFCNT_dec (req->fh2);	600	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	601	SvREFCNT_dec (req->callback);
104		602
105	if (req->type == REQ_READDIR && req->result >= 0)	603	if (req->flags & FLAG_PTR2_FREE)
106	free (req->data2ptr);	604	free (req->ptr2);
107		605
108	Safefree (req);	606	Safefree (req);
109	}	607	}
110		608
111	static void	609	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	610	{
114	if (nreqs && !ress)	611	aio_req sub;
		612
		613	if (grp->type != REQ_GROUP)
		614	return;
		615
		616	SvREFCNT_dec (grp->sv2);
		617	grp->sv2 = 0;
		618
		619	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		620	req_cancel (sub);
		621	}
		622
		623	static void req_cancel (aio_req req)
		624	{
		625	req->flags |= FLAG_CANCELLED;
		626
		627	req_cancel_subs (req);
		628	}
		629
		630	X_THREAD_PROC (aio_proc);
		631
		632	static void start_thread (void)
		633	{
		634	worker *wrk = calloc (1, sizeof (worker));
		635
		636	if (!wrk)
		637	croak ("unable to allocate worker thread data");
		638
		639	X_LOCK (wrklock);
		640
		641	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
115	{	642	{
		643	wrk->prev = &wrk_first;
		644	wrk->next = wrk_first.next;
		645	wrk_first.next->prev = wrk;
		646	wrk_first.next = wrk;
		647	++started;
		648	}
		649	else
		650	free (wrk);
		651
		652	X_UNLOCK (wrklock);
		653	}
		654
		655	static void maybe_start_thread ()
		656	{
		657	if (get_nthreads () >= wanted)
		658	return;
		659
		660	/* todo: maybe use idle here, but might be less exact */
		661	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		662	return;
		663
		664	start_thread ();
		665	}
		666
		667	static void req_send (aio_req req)
		668	{
		669	block_sig ();
		670
		671	++nreqs;
		672
		673	X_LOCK (reqlock);
		674	++nready;
		675	reqq_push (&req_queue, req);
		676	X_COND_SIGNAL (reqwait);
		677	X_UNLOCK (reqlock);
		678
		679	unblock_sig ();
		680
		681	maybe_start_thread ();
		682	}
		683
		684	static void end_thread (void)
		685	{
		686	aio_req req;
		687
		688	Newz (0, req, 1, aio_cb);
		689
		690	req->type = REQ_QUIT;
		691	req->pri = PRI_MAX + PRI_BIAS;
		692
		693	X_LOCK (reqlock);
		694	reqq_push (&req_queue, req);
		695	X_COND_SIGNAL (reqwait);
		696	X_UNLOCK (reqlock);
		697
		698	X_LOCK (wrklock);
		699	--started;
		700	X_UNLOCK (wrklock);
		701	}
		702
		703	static void set_max_idle (int nthreads)
		704	{
		705	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		706	max_idle = nthreads <= 0 ? 1 : nthreads;
		707	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		708	}
		709
		710	static void min_parallel (int nthreads)
		711	{
		712	if (wanted < nthreads)
		713	wanted = nthreads;
		714	}
		715
		716	static void max_parallel (int nthreads)
		717	{
		718	if (wanted > nthreads)
		719	wanted = nthreads;
		720
		721	while (started > wanted)
		722	end_thread ();
		723	}
		724
		725	static void poll_wait ()
		726	{
116	fd_set rfd;	727	fd_set rfd;
		728
		729	while (nreqs)
		730	{
		731	int size;
		732	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		733	size = res_queue.size;
		734	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		735
		736	if (size)
		737	return;
		738
		739	maybe_start_thread ();
		740
117	FD_ZERO(&rfd);	741	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	742	FD_SET(respipe [0], &rfd);
119		743
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	744	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	745	}
122	}	746	}
123		747
124	static int	748	static int poll_cb ()
125	poll_cb ()
126	{	749	{
127	dSP;	750	dSP;
128	int count = 0;	751	int count = 0;
		752	int maxreqs = max_poll_reqs;
129	int do_croak = 0;	753	int do_croak = 0;
		754	struct timeval tv_start, tv_now;
130	aio_req req;	755	aio_req req;
		756
		757	if (max_poll_time)
		758	gettimeofday (&tv_start, 0);
		759
		760	block_sig ();
131		761
132	for (;;)	762	for (;;)
133	{	763	{
134	pthread_mutex_lock (&reslock);	764	for (;;)
135	req = ress;
136
137	if (req)
138	{	765	{
139	ress = req->next;	766	maybe_start_thread ();
140		767
		768	X_LOCK (reslock);
		769	req = reqq_shift (&res_queue);
		770
141	if (!ress)	771	if (req)
142	{	772	{
		773	--npending;
		774
		775	if (!res_queue.size)
		776	{
143	/* read any signals sent by the worker threads */	777	/* read any signals sent by the worker threads */
144	char buf [32];	778	char buf [4];
145	while (read (respipe [0], buf, 32) == 32)	779	while (read (respipe [0], buf, 4) == 4)
		780	;
146	;	781	}
147
148	rese = 0;
149	}	782	}
150	}
151		783
152	pthread_mutex_unlock (&reslock);	784	X_UNLOCK (reslock);
153		785
154	if (!req)	786	if (!req)
155	break;	787	break;
156		788
157	nreqs--;	789	--nreqs;
158		790
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)	791	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	{	792	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	793	req->int1 = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	794	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	}	795	}
205	else	796	else
206	{	797	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));	798	if (!req_invoke (req))
208
209	if (req->type == REQ_OPEN)
210	{	799	{
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);	800	req_destroy (req);
		801	unblock_sig ();
234	croak (0);	802	croak (0);
235	}	803	}
		804
		805	count++;
236	}	806	}
237		807
238	LEAVE;	808	req_destroy (req);
239		809
240	errno = errorno;	810	if (maxreqs && !--maxreqs)
241	count++;	811	break;
		812
		813	if (max_poll_time)
		814	{
		815	gettimeofday (&tv_now, 0);
		816
		817	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		818	break;
		819	}
242	}	820	}
243		821
244	free_req (req);	822	if (nreqs <= max_outstanding)
		823	break;
		824
		825	poll_wait ();
		826
		827	++maxreqs;
245	}	828	}
246		829
		830	unblock_sig ();
247	return count;	831	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	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}	832	}
354		833
355	/*****************************************************************************/	834	/*****************************************************************************/
356	/* work around various missing functions */	835	/* work around various missing functions */
357		836
…		…
362	/*	841	/*
363	* make our pread/pwrite safe against themselves, but not against	842	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,	843	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.	844	* but that's your problem, not mine.
366	*/	845	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	846	static mutex_t preadwritelock = X_MUTEX_INIT;
368		847
369	static ssize_t	848	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	{	849	{
372	ssize_t res;	850	ssize_t res;
373	off_t ooffset;	851	off_t ooffset;
374		852
375	pthread_mutex_lock (&preadwritelock);	853	X_LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	854	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	855	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	856	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	857	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	858	X_UNLOCK (preadwritelock);
381		859
382	return res;	860	return res;
383	}	861	}
384		862
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)	863	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
387	{	864	{
388	ssize_t res;	865	ssize_t res;
389	off_t ooffset;	866	off_t ooffset;
390		867
391	pthread_mutex_lock (&preadwritelock);	868	X_LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	869	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	870	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	871	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	872	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	873	X_UNLOCK (preadwritelock);
397		874
398	return res;	875	return res;
399	}	876	}
		877	#endif
		878
		879	#ifndef HAVE_FUTIMES
		880
		881	# define utimes(path,times) aio_utimes (path, times)
		882	# define futimes(fd,times) aio_futimes (fd, times)
		883
		884	int aio_utimes (const char *filename, const struct timeval times[2])
		885	{
		886	if (times)
		887	{
		888	struct utimbuf buf;
		889
		890	buf.actime = times[0].tv_sec;
		891	buf.modtime = times[1].tv_sec;
		892
		893	return utime (filename, &buf);
		894	}
		895	else
		896	return utime (filename, 0);
		897	}
		898
		899	int aio_futimes (int fd, const struct timeval tv[2])
		900	{
		901	errno = ENOSYS;
		902	return -1;
		903	}
		904
400	#endif	905	#endif
401		906
402	#if !HAVE_FDATASYNC	907	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	908	# define fdatasync fsync
404	#endif	909	#endif
405		910
406	#if !HAVE_READAHEAD	911	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	912	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		913
409	static ssize_t	914	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	{	915	{
412	char readahead_buf[4096];	916	size_t todo = count;
		917	dBUF;
413		918
414	while (count > 0)	919	while (todo > 0)
415	{	920	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	921	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
417		922
418	pread (fd, readahead_buf, len, offset);	923	pread (fd, aio_buf, len, offset);
419	offset += len;	924	offset += len;
420	count -= len;	925	todo -= len;
421	}	926	}
422		927
423	errno = 0;	928	errno = 0;
		929	return count;
424	}	930	}
		931
425	#endif	932	#endif
426		933
427	#if !HAVE_READDIR_R	934	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	935	# define readdir_r aio_readdir_r
429		936
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	937	static mutex_t readdirlock = X_MUTEX_INIT;
431		938
432	static int	939	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	940	{
435	struct dirent *e;	941	X_DIRENT *e;
436	int errorno;	942	int errorno;
437		943
438	pthread_mutex_lock (&readdirlock);	944	X_LOCK (readdirlock);
439		945
440	e = readdir (dirp);	946	e = readdir (dirp);
441	errorno = errno;	947	errorno = errno;
442		948
443	if (e)	949	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	952	strcpy (ent->d_name, e->d_name);
447	}	953	}
448	else	954	else
449	*res = 0;	955	*res = 0;
450		956
451	pthread_mutex_unlock (&readdirlock);	957	X_UNLOCK (readdirlock);
452		958
453	errno = errorno;	959	errno = errorno;
454	return e ? 0 : -1;	960	return e ? 0 : -1;
455	}	961	}
456	#endif	962	#endif
457		963
458	/* sendfile always needs emulation */	964	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	965	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
461	{	966	{
462	ssize_t res;	967	ssize_t res;
463		968
464	if (!count)	969	if (!count)
465	return 0;	970	return 0;
…		…
476	{	981	{
477	off_t sbytes;	982	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	983	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		984
480	if (res < 0 && sbytes)	985	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	986	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	987	res = sbytes;
483	}	988	}
484		989
485	# elif __hpux	990	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	991	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
499		1004
500	if (res < 0 && sbytes)	1005	if (res < 0 && sbytes)
501	res = sbytes;	1006	res = sbytes;
502	}	1007	}
503		1008
		1009	# endif
504	# else	1010	#else
505	res = -1;	1011	res = -1;
506	errno = ENOSYS;	1012	errno = ENOSYS;
507	# endif
508	#endif	1013	#endif
509		1014
510	if (res < 0	1015	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1016	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris	1017	#if __solaris
…		…
514	#endif	1019	#endif
515	)	1020	)
516	)	1021	)
517	{	1022	{
518	/* emulate sendfile. this is a major pain in the ass */	1023	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	1024	dBUF;
		1025
520	res = 0;	1026	res = 0;
521		1027
522	for (;;)	1028	while (count)
523	{	1029	{
524	ssize_t cnt;	1030	ssize_t cnt;
525		1031
526	cnt = pread (ifd, buf, 4096, offset);	1032	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		1033
528	if (cnt <= 0)	1034	if (cnt <= 0)
529	{	1035	{
530	if (cnt && !res) res = -1;	1036	if (cnt && !res) res = -1;
531	break;	1037	break;
532	}	1038	}
533		1039
534	cnt = write (ofd, buf, cnt);	1040	cnt = write (ofd, aio_buf, cnt);
535		1041
536	if (cnt <= 0)	1042	if (cnt <= 0)
537	{	1043	{
538	if (cnt && !res) res = -1;	1044	if (cnt && !res) res = -1;
539	break;	1045	break;
540	}	1046	}
541		1047
542	offset += cnt;	1048	offset += cnt;
543	res += cnt;	1049	res += cnt;
		1050	count -= cnt;
544	}	1051	}
545	}	1052	}
546		1053
547	return res;	1054	return res;
548	}	1055	}
549		1056
550	/* read a full directory */	1057	/* read a full directory */
551	static int	1058	static void scandir_ (aio_req req, worker *self)
552	scandir_ (const char *path, void **namesp)
553	{	1059	{
554	DIR *dirp = opendir (path);	1060	DIR *dirp;
555	union	1061	union
556	{	1062	{
557	struct dirent d;	1063	X_DIRENT d;
558	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1064	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
559	} u;	1065	} *u;
560	struct dirent *entp;	1066	X_DIRENT *entp;
561	char *name, *names;	1067	char *name, *names;
562	int memlen = 4096;	1068	int memlen = 4096;
563	int memofs = 0;	1069	int memofs = 0;
564	int res = 0;	1070	int res = 0;
565	int errorno;
566		1071
567	if (!dirp)	1072	X_LOCK (wrklock);
568	return -1;	1073	self->dirp = dirp = opendir (req->ptr1);
569		1074	self->dbuf = u = malloc (sizeof (*u));
		1075	req->flags |= FLAG_PTR2_FREE;
570	names = malloc (memlen);	1076	req->ptr2 = names = malloc (memlen);
		1077	X_UNLOCK (wrklock);
		1078
		1079	if (dirp && u && names)
		1080	for (;;)
		1081	{
		1082	errno = 0;
		1083	readdir_r (dirp, &u->d, &entp);
		1084
		1085	if (!entp)
		1086	break;
		1087
		1088	name = entp->d_name;
		1089
		1090	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1091	{
		1092	int len = strlen (name) + 1;
		1093
		1094	res++;
		1095
		1096	while (memofs + len > memlen)
		1097	{
		1098	memlen *= 2;
		1099	X_LOCK (wrklock);
		1100	req->ptr2 = names = realloc (names, memlen);
		1101	X_UNLOCK (wrklock);
		1102
		1103	if (!names)
		1104	break;
		1105	}
		1106
		1107	memcpy (names + memofs, name, len);
		1108	memofs += len;
		1109	}
		1110	}
		1111
		1112	if (errno)
		1113	res = -1;
		1114
		1115	req->result = res;
		1116	}
		1117
		1118	/*****************************************************************************/
		1119
		1120	X_THREAD_PROC (aio_proc)
		1121	{
		1122	{//D
		1123	aio_req req;
		1124	struct timespec ts;
		1125	worker *self = (worker *)thr_arg;
		1126
		1127	/* try to distribute timeouts somewhat randomly */
		1128	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
571		1129
572	for (;;)	1130	for (;;)
573	{	1131	{
574	errno = 0, readdir_r (dirp, &u.d, &entp);	1132	ts.tv_sec = time (0) + IDLE_TIMEOUT;
575		1133
576	if (!entp)	1134	X_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		1135
626	for (;;)	1136	for (;;)
627	{	1137	{
628	req = reqs;	1138	self->req = req = reqq_shift (&req_queue);
629
630	if (reqs)
631	{
632	reqs = reqs->next;
633	if (!reqs) reqe = 0;
634	}
635		1139
636	if (req)	1140	if (req)
637	break;	1141	break;
638		1142
639	pthread_cond_wait (&reqwait, &reqlock);	1143	++idle;
		1144
		1145	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
		1146	== ETIMEDOUT)
		1147	{
		1148	if (idle > max_idle)
		1149	{
		1150	--idle;
		1151	X_UNLOCK (reqlock);
		1152	X_LOCK (wrklock);
		1153	--started;
		1154	X_UNLOCK (wrklock);
		1155	goto quit;
		1156	}
		1157
		1158	/* we are allowed to idle, so do so without any timeout */
		1159	X_COND_WAIT (reqwait, reqlock);
		1160	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1161	}
		1162
		1163	--idle;
640	}	1164	}
641		1165
642	pthread_mutex_unlock (&reqlock);	1166	--nready;
		1167
		1168	X_UNLOCK (reqlock);
643		1169
644	errno = 0; /* strictly unnecessary */	1170	errno = 0; /* strictly unnecessary */
645		1171
646	type = req->type;	1172	if (!(req->flags & FLAG_CANCELLED))
647
648	switch (type)	1173	switch (req->type)
		1174	{
		1175	case REQ_READ: req->result = req->offs >= 0
		1176	? pread (req->int1, req->ptr1, req->size, req->offs)
		1177	: read (req->int1, req->ptr1, req->size); break;
		1178	case REQ_WRITE: req->result = req->offs >= 0
		1179	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1180	: write (req->int1, req->ptr1, req->size); break;
		1181
		1182	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1183	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1184
		1185	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1186	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1187	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1188
		1189	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1190	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1191	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1192	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1193	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1194	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1195
		1196	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1197	case REQ_CLOSE: req->result = close (req->int1); break;
		1198	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1199	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1200	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1201	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1202	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1203	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1204	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1205	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1206
		1207	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1208	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1209	case REQ_READDIR: scandir_ (req, self); break;
		1210
		1211	case REQ_BUSY:
		1212	#ifdef _WIN32
		1213	Sleep (req->nv1 * 1000.);
		1214	#else
		1215	{
		1216	struct timeval tv;
		1217
		1218	tv.tv_sec = req->nv1;
		1219	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1220
		1221	req->result = select (0, 0, 0, 0, &tv);
		1222	}
		1223	#endif
		1224	break;
		1225
		1226	case REQ_UTIME:
		1227	case REQ_FUTIME:
		1228	{
		1229	struct timeval tv[2];
		1230	struct timeval *times;
		1231
		1232	if (req->nv1 != -1. || req->nv2 != -1.)
		1233	{
		1234	tv[0].tv_sec = req->nv1;
		1235	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1236	tv[1].tv_sec = req->nv2;
		1237	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1238
		1239	times = tv;
		1240	}
		1241	else
		1242	times = 0;
		1243
		1244
		1245	req->result = req->type == REQ_FUTIME
		1246	? futimes (req->int1, times)
		1247	: utimes (req->ptr1, times);
		1248	}
		1249
		1250	case REQ_GROUP:
		1251	case REQ_NOP:
		1252	break;
		1253
		1254	case REQ_QUIT:
		1255	goto quit;
		1256
		1257	default:
		1258	req->result = -1;
		1259	break;
		1260	}
		1261
		1262	req->errorno = errno;
		1263
		1264	X_LOCK (reslock);
		1265
		1266	++npending;
		1267
		1268	if (!reqq_push (&res_queue, req))
649	{	1269	{
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 */	1270	/* write a dummy byte to the pipe so fh becomes ready */
694	write (respipe [1], &respipe, 1);	1271	write (respipe [1], &respipe, 1);
		1272
		1273	/* optionally signal the main thread asynchronously */
		1274	if (main_sig)
		1275	pthread_kill (main_tid, main_sig);
695	}	1276	}
696		1277
697	pthread_mutex_unlock (&reslock);	1278	self->req = 0;
		1279	worker_clear (self);
		1280
		1281	X_UNLOCK (reslock);
698	}	1282	}
699	while (type != REQ_QUIT);	1283
		1284	quit:
		1285	X_LOCK (wrklock);
		1286	worker_free (self);
		1287	X_UNLOCK (wrklock);
700		1288
701	return 0;	1289	return 0;
		1290	}//D
702	}	1291	}
703		1292
704	/*****************************************************************************/	1293	/*****************************************************************************/
705		1294
706	static void atfork_prepare (void)	1295	static void atfork_prepare (void)
707	{	1296	{
708	pthread_mutex_lock (&reqlock);	1297	X_LOCK (wrklock);
709	pthread_mutex_lock (&reslock);	1298	X_LOCK (reqlock);
		1299	X_LOCK (reslock);
710	#if !HAVE_PREADWRITE	1300	#if !HAVE_PREADWRITE
711	pthread_mutex_lock (&preadwritelock);	1301	X_LOCK (preadwritelock);
712	#endif	1302	#endif
713	#if !HAVE_READDIR_R	1303	#if !HAVE_READDIR_R
714	pthread_mutex_lock (&readdirlock);	1304	X_LOCK (readdirlock);
715	#endif	1305	#endif
716	}	1306	}
717		1307
718	static void atfork_parent (void)	1308	static void atfork_parent (void)
719	{	1309	{
720	#if !HAVE_READDIR_R	1310	#if !HAVE_READDIR_R
721	pthread_mutex_unlock (&readdirlock);	1311	X_UNLOCK (readdirlock);
722	#endif	1312	#endif
723	#if !HAVE_PREADWRITE	1313	#if !HAVE_PREADWRITE
724	pthread_mutex_unlock (&preadwritelock);	1314	X_UNLOCK (preadwritelock);
725	#endif	1315	#endif
726	pthread_mutex_unlock (&reslock);	1316	X_UNLOCK (reslock);
727	pthread_mutex_unlock (&reqlock);	1317	X_UNLOCK (reqlock);
		1318	X_UNLOCK (wrklock);
728	}	1319	}
729		1320
730	static void atfork_child (void)	1321	static void atfork_child (void)
731	{	1322	{
732	aio_req prv;	1323	aio_req prv;
733		1324
734	started = 0;	1325	while (prv = reqq_shift (&req_queue))
		1326	req_destroy (prv);
735		1327
736	while (reqs)	1328	while (prv = reqq_shift (&res_queue))
		1329	req_destroy (prv);
		1330
		1331	while (wrk_first.next != &wrk_first)
737	{	1332	{
738	prv = reqs;	1333	worker *wrk = wrk_first.next;
739	reqs = prv->next;	1334
740	free_req (prv);	1335	if (wrk->req)
		1336	req_destroy (wrk->req);
		1337
		1338	worker_clear (wrk);
		1339	worker_free (wrk);
741	}	1340	}
742		1341
743	reqs = reqe = 0;	1342	started = 0;
744		1343	idle = 0;
745	while (ress)	1344	nreqs = 0;
746	{	1345	nready = 0;
747	prv = ress;	1346	npending = 0;
748	ress = prv->next;
749	free_req (prv);
750	}
751
752	ress = rese = 0;
753		1347
754	close (respipe [0]);	1348	close (respipe [0]);
755	close (respipe [1]);	1349	close (respipe [1]);
756	create_pipe ();	1350
		1351	if (!create_pipe (respipe))
		1352	croak ("cannot set result pipe to nonblocking mode");
757		1353
758	atfork_parent ();	1354	atfork_parent ();
759	}	1355	}
760		1356
761	#define dREQ \	1357	#define dREQ \
762	aio_req req; \	1358	aio_req req; \
		1359	int req_pri = next_pri; \
		1360	next_pri = DEFAULT_PRI + PRI_BIAS; \
763	\	1361	\
764	if (SvOK (callback) && !SvROK (callback)) \	1362	if (SvOK (callback) && !SvROK (callback)) \
765	croak ("clalback must be undef or of reference type"); \	1363	croak ("callback must be undef or of reference type"); \
766	\	1364	\
767	Newz (0, req, 1, aio_cb); \	1365	Newz (0, req, 1, aio_cb); \
768	if (!req) \	1366	if (!req) \
769	croak ("out of memory during aio_req allocation"); \	1367	croak ("out of memory during aio_req allocation"); \
770	\	1368	\
771	req->callback = newSVsv (callback);	1369	req->callback = newSVsv (callback); \
		1370	req->pri = req_pri
		1371
		1372	#define REQ_SEND \
		1373	req_send (req); \
		1374	\
		1375	if (GIMME_V != G_VOID) \
		1376	XPUSHs (req_sv (req, AIO_REQ_KLASS));
772		1377
773	MODULE = IO::AIO PACKAGE = IO::AIO	1378	MODULE = IO::AIO PACKAGE = IO::AIO
774		1379
775	PROTOTYPES: ENABLE	1380	PROTOTYPES: ENABLE
776		1381
777	BOOT:	1382	BOOT:
778	{	1383	{
779	create_pipe ();	1384	HV *stash = gv_stashpv ("IO::AIO", 1);
		1385
		1386	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1387	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1388	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1389	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1390	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1391	#ifdef _WIN32
		1392	X_MUTEX_CHECK (wrklock);
		1393	X_MUTEX_CHECK (reslock);
		1394	X_MUTEX_CHECK (reqlock);
		1395	X_MUTEX_CHECK (reqwait);
		1396	X_MUTEX_CHECK (preadwritelock);
		1397	X_MUTEX_CHECK (readdirlock);
		1398	#else
		1399	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1400	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1401	#endif
		1402
		1403	if (!create_pipe (respipe))
		1404	croak ("cannot set result pipe to nonblocking mode");
		1405
780	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1406	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
781	}	1407	}
782		1408
783	void	1409	void
784	min_parallel(nthreads)	1410	max_poll_reqs (int nreqs)
785	int nthreads
786	PROTOTYPE: $	1411	PROTOTYPE: $
		1412	CODE:
		1413	max_poll_reqs = nreqs;
787		1414
788	void	1415	void
789	max_parallel(nthreads)	1416	max_poll_time (double nseconds)
790	int nthreads
791	PROTOTYPE: $	1417	PROTOTYPE: $
		1418	CODE:
		1419	max_poll_time = nseconds * AIO_TICKS;
		1420
		1421	void
		1422	min_parallel (int nthreads)
		1423	PROTOTYPE: $
		1424
		1425	void
		1426	max_parallel (int nthreads)
		1427	PROTOTYPE: $
		1428
		1429	void
		1430	max_idle (int nthreads)
		1431	PROTOTYPE: $
		1432	CODE:
		1433	set_max_idle (nthreads);
792		1434
793	int	1435	int
794	max_outstanding(nreqs)	1436	max_outstanding (int maxreqs)
795	int nreqs	1437	PROTOTYPE: $
796	PROTOTYPE: $
797	CODE:	1438	CODE:
798	RETVAL = max_outstanding;	1439	RETVAL = max_outstanding;
799	max_outstanding = nreqs;	1440	max_outstanding = maxreqs;
		1441	OUTPUT:
		1442	RETVAL
800		1443
801	void	1444	void
802	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1445	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
803	SV * pathname
804	int flags
805	int mode
806	SV * callback
807	PROTOTYPE: $$$;$	1446	PROTOTYPE: $$$;$
808	CODE:	1447	PPCODE:
809	{	1448	{
810	dREQ;	1449	dREQ;
811		1450
812	req->type = REQ_OPEN;	1451	req->type = REQ_OPEN;
813	req->data = newSVsv (pathname);	1452	req->sv1 = newSVsv (pathname);
814	req->dataptr = SvPVbyte_nolen (req->data);	1453	req->ptr1 = SvPVbyte_nolen (req->sv1);
815	req->fd = flags;	1454	req->int1 = flags;
816	req->mode = mode;	1455	req->mode = mode;
817		1456
818	send_req (req);	1457	REQ_SEND;
819	}	1458	}
820		1459
821	void	1460	void
822	aio_close(fh,callback=&PL_sv_undef)	1461	aio_close (SV *fh, SV *callback=&PL_sv_undef)
823	SV * fh
824	SV * callback
825	PROTOTYPE: $;$	1462	PROTOTYPE: $;$
826	ALIAS:	1463	ALIAS:
827	aio_close = REQ_CLOSE	1464	aio_close = REQ_CLOSE
828	aio_fsync = REQ_FSYNC	1465	aio_fsync = REQ_FSYNC
829	aio_fdatasync = REQ_FDATASYNC	1466	aio_fdatasync = REQ_FDATASYNC
830	CODE:	1467	PPCODE:
831	{	1468	{
832	dREQ;	1469	dREQ;
833		1470
834	req->type = ix;	1471	req->type = ix;
835	req->fh = newSVsv (fh);	1472	req->sv1 = newSVsv (fh);
836	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1473	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
837		1474
838	send_req (req);	1475	REQ_SEND (req);
839	}	1476	}
840		1477
841	void	1478	void
842	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1479	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
843	SV * fh
844	UV offset
845	UV length
846	SV * data
847	UV dataoffset
848	SV * callback
849	ALIAS:	1480	ALIAS:
850	aio_read = REQ_READ	1481	aio_read = REQ_READ
851	aio_write = REQ_WRITE	1482	aio_write = REQ_WRITE
852	PROTOTYPE: $$$$$;$	1483	PROTOTYPE: $$$$$;$
853	CODE:	1484	PPCODE:
854	{	1485	{
855	aio_req req;
856	STRLEN svlen;	1486	STRLEN svlen;
857	char *svptr = SvPVbyte (data, svlen);	1487	char *svptr = SvPVbyte (data, svlen);
		1488	UV len = SvUV (length);
858		1489
859	SvUPGRADE (data, SVt_PV);	1490	SvUPGRADE (data, SVt_PV);
860	SvPOK_on (data);	1491	SvPOK_on (data);
861		1492
862	if (dataoffset < 0)	1493	if (dataoffset < 0)
863	dataoffset += svlen;	1494	dataoffset += svlen;
864		1495
865	if (dataoffset < 0 || dataoffset > svlen)	1496	if (dataoffset < 0 || dataoffset > svlen)
866	croak ("data offset outside of string");	1497	croak ("dataoffset outside of data scalar");
867		1498
868	if (ix == REQ_WRITE)	1499	if (ix == REQ_WRITE)
869	{	1500	{
870	/* write: check length and adjust. */	1501	/* write: check length and adjust. */
871	if (length < 0 || length + dataoffset > svlen)	1502	if (!SvOK (length) || len + dataoffset > svlen)
872	length = svlen - dataoffset;	1503	len = svlen - dataoffset;
873	}	1504	}
874	else	1505	else
875	{	1506	{
876	/* read: grow scalar as necessary */	1507	/* read: grow scalar as necessary */
877	svptr = SvGROW (data, length + dataoffset);	1508	svptr = SvGROW (data, len + dataoffset + 1);
878	}	1509	}
879		1510
880	if (length < 0)	1511	if (len < 0)
881	croak ("length must not be negative");	1512	croak ("length must not be negative");
882		1513
883	{	1514	{
884	dREQ;	1515	dREQ;
885		1516
886	req->type = ix;	1517	req->type = ix;
887	req->fh = newSVsv (fh);	1518	req->sv1 = newSVsv (fh);
888	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1519	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
889	: IoOFP (sv_2io (fh)));	1520	: IoOFP (sv_2io (fh)));
		1521	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
890	req->offset = offset;	1522	req->size = len;
891	req->length = length;
892	req->data = SvREFCNT_inc (data);	1523	req->sv2 = SvREFCNT_inc (data);
893	req->dataptr = (char *)svptr + dataoffset;	1524	req->ptr1 = (char *)svptr + dataoffset;
		1525	req->stroffset = dataoffset;
894		1526
895	if (!SvREADONLY (data))	1527	if (!SvREADONLY (data))
896	{	1528	{
897	SvREADONLY_on (data);	1529	SvREADONLY_on (data);
898	req->data2ptr = (void *)data;	1530	req->flags |= FLAG_SV2_RO_OFF;
899	}	1531	}
900		1532
901	send_req (req);	1533	REQ_SEND;
902	}	1534	}
903	}	1535	}
904		1536
905	void	1537	void
		1538	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1539	PROTOTYPE: $$;$
		1540	PPCODE:
		1541	{
		1542	SV *data;
		1543	dREQ;
		1544
		1545	data = newSV (NAME_MAX);
		1546	SvPOK_on (data);
		1547
		1548	req->type = REQ_READLINK;
		1549	req->sv1 = newSVsv (path);
		1550	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1551	req->sv2 = data;
		1552	req->ptr1 = SvPVbyte_nolen (data);
		1553
		1554	REQ_SEND;
		1555	}
		1556
		1557	void
906	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1558	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
907	SV * out_fh
908	SV * in_fh
909	UV in_offset
910	UV length
911	SV * callback
912	PROTOTYPE: $$$$;$	1559	PROTOTYPE: $$$$;$
913	CODE:	1560	PPCODE:
914	{	1561	{
915	dREQ;	1562	dREQ;
916		1563
917	req->type = REQ_SENDFILE;	1564	req->type = REQ_SENDFILE;
918	req->fh = newSVsv (out_fh);	1565	req->sv1 = newSVsv (out_fh);
919	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
920	req->fh2 = newSVsv (in_fh);	1567	req->sv2 = newSVsv (in_fh);
921	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1568	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
922	req->offset = in_offset;	1569	req->offs = SvVAL64 (in_offset);
923	req->length = length;	1570	req->size = length;
924		1571
925	send_req (req);	1572	REQ_SEND;
926	}	1573	}
927		1574
928	void	1575	void
929	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1576	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
930	SV * fh
931	UV offset
932	IV length
933	SV * callback
934	PROTOTYPE: $$$;$	1577	PROTOTYPE: $$$;$
935	CODE:	1578	PPCODE:
936	{	1579	{
937	dREQ;	1580	dREQ;
938		1581
939	req->type = REQ_READAHEAD;	1582	req->type = REQ_READAHEAD;
940	req->fh = newSVsv (fh);	1583	req->sv1 = newSVsv (fh);
941	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1584	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
942	req->offset = offset;	1585	req->offs = SvVAL64 (offset);
943	req->length = length;	1586	req->size = length;
944		1587
945	send_req (req);	1588	REQ_SEND;
946	}	1589	}
947		1590
948	void	1591	void
949	aio_stat(fh_or_path,callback=&PL_sv_undef)	1592	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
950	SV * fh_or_path
951	SV * callback
952	ALIAS:	1593	ALIAS:
953	aio_stat = REQ_STAT	1594	aio_stat = REQ_STAT
954	aio_lstat = REQ_LSTAT	1595	aio_lstat = REQ_LSTAT
955	CODE:	1596	PPCODE:
956	{	1597	{
957	dREQ;	1598	dREQ;
958		1599
959	New (0, req->statdata, 1, Stat_t);	1600	req->ptr2 = malloc (sizeof (Stat_t));
960	if (!req->statdata)	1601	if (!req->ptr2)
961	{	1602	{
962	free_req (req);	1603	req_destroy (req);
963	croak ("out of memory during aio_req->statdata allocation");	1604	croak ("out of memory during aio_stat statdata allocation");
964	}	1605	}
		1606
		1607	req->flags |= FLAG_PTR2_FREE;
		1608	req->sv1 = newSVsv (fh_or_path);
965		1609
966	if (SvPOK (fh_or_path))	1610	if (SvPOK (fh_or_path))
967	{	1611	{
968	req->type = ix;	1612	req->type = ix;
969	req->data = newSVsv (fh_or_path);
970	req->dataptr = SvPVbyte_nolen (req->data);	1613	req->ptr1 = SvPVbyte_nolen (req->sv1);
971	}	1614	}
972	else	1615	else
973	{	1616	{
974	req->type = REQ_FSTAT;	1617	req->type = REQ_FSTAT;
975	req->fh = newSVsv (fh_or_path);
976	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1618	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
977	}	1619	}
978		1620
979	send_req (req);	1621	REQ_SEND;
980	}	1622	}
981		1623
982	void	1624	void
		1625	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1626	PPCODE:
		1627	{
		1628	dREQ;
		1629
		1630	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1631	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1632	req->sv1 = newSVsv (fh_or_path);
		1633
		1634	if (SvPOK (fh_or_path))
		1635	{
		1636	req->type = REQ_UTIME;
		1637	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1638	}
		1639	else
		1640	{
		1641	req->type = REQ_FUTIME;
		1642	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1643	}
		1644
		1645	REQ_SEND;
		1646	}
		1647
		1648	void
		1649	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1650	PPCODE:
		1651	{
		1652	dREQ;
		1653
		1654	req->sv1 = newSVsv (fh_or_path);
		1655	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1656
		1657	if (SvPOK (fh_or_path))
		1658	{
		1659	req->type = REQ_TRUNCATE;
		1660	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1661	}
		1662	else
		1663	{
		1664	req->type = REQ_FTRUNCATE;
		1665	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1666	}
		1667
		1668	REQ_SEND;
		1669	}
		1670
		1671	void
		1672	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1673	PPCODE:
		1674	{
		1675	dREQ;
		1676
		1677	req->mode = mode;
		1678	req->sv1 = newSVsv (fh_or_path);
		1679
		1680	if (SvPOK (fh_or_path))
		1681	{
		1682	req->type = REQ_CHMOD;
		1683	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1684	}
		1685	else
		1686	{
		1687	req->type = REQ_FCHMOD;
		1688	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1689	}
		1690
		1691	REQ_SEND;
		1692	}
		1693
		1694	void
		1695	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1696	PPCODE:
		1697	{
		1698	dREQ;
		1699
		1700	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1701	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1702	req->sv1 = newSVsv (fh_or_path);
		1703
		1704	if (SvPOK (fh_or_path))
		1705	{
		1706	req->type = REQ_CHOWN;
		1707	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1708	}
		1709	else
		1710	{
		1711	req->type = REQ_FCHOWN;
		1712	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1713	}
		1714
		1715	REQ_SEND;
		1716	}
		1717
		1718	void
983	aio_unlink(pathname,callback=&PL_sv_undef)	1719	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
984	SV * pathname
985	SV * callback
986	ALIAS:	1720	ALIAS:
987	aio_unlink = REQ_UNLINK	1721	aio_unlink = REQ_UNLINK
988	aio_rmdir = REQ_RMDIR	1722	aio_rmdir = REQ_RMDIR
		1723	aio_readdir = REQ_READDIR
989	CODE:	1724	PPCODE:
990	{	1725	{
991	dREQ;	1726	dREQ;
992		1727
993	req->type = ix;	1728	req->type = ix;
994	req->data = newSVsv (pathname);	1729	req->sv1 = newSVsv (pathname);
995	req->dataptr = SvPVbyte_nolen (req->data);	1730	req->ptr1 = SvPVbyte_nolen (req->sv1);
996
997	send_req (req);
998	}
999		1731
		1732	REQ_SEND;
		1733	}
		1734
1000	void	1735	void
1001	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1736	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
1002	SV * oldpath
1003	SV * newpath
1004	SV * callback
1005	CODE:	1737	PPCODE:
1006	{	1738	{
1007	dREQ;	1739	dREQ;
1008		1740
1009	req->type = REQ_SYMLINK;	1741	req->type = REQ_MKDIR;
1010	req->fh = newSVsv (oldpath);	1742	req->sv1 = newSVsv (pathname);
1011	req->data2ptr = SvPVbyte_nolen (req->fh);	1743	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->data = newSVsv (newpath);	1744	req->mode = mode;
1013	req->dataptr = SvPVbyte_nolen (req->data);
1014
1015	send_req (req);
1016	}
1017		1745
		1746	REQ_SEND;
		1747	}
		1748
1018	void	1749	void
1019	aio_readdir(pathname,callback=&PL_sv_undef)	1750	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1020	SV * pathname	1751	ALIAS:
1021	SV * callback	1752	aio_link = REQ_LINK
		1753	aio_symlink = REQ_SYMLINK
		1754	aio_rename = REQ_RENAME
1022	CODE:	1755	PPCODE:
1023	{	1756	{
1024	dREQ;	1757	dREQ;
1025		1758
1026	req->type = REQ_READDIR;	1759	req->type = ix;
1027	req->data = newSVsv (pathname);	1760	req->sv2 = newSVsv (oldpath);
1028	req->dataptr = SvPVbyte_nolen (req->data);	1761	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1762	req->sv1 = newSVsv (newpath);
		1763	req->ptr1 = SvPVbyte_nolen (req->sv1);
1029		1764
1030	send_req (req);	1765	REQ_SEND;
1031	}	1766	}
1032		1767
1033	void	1768	void
		1769	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1770	PPCODE:
		1771	{
		1772	dREQ;
		1773
		1774	req->type = REQ_MKNOD;
		1775	req->sv1 = newSVsv (pathname);
		1776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1777	req->mode = (mode_t)mode;
		1778	req->offs = dev;
		1779
		1780	REQ_SEND;
		1781	}
		1782
		1783	void
		1784	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1785	PPCODE:
		1786	{
		1787	dREQ;
		1788
		1789	req->type = REQ_BUSY;
		1790	req->nv1 = delay < 0. ? 0. : delay;
		1791
		1792	REQ_SEND;
		1793	}
		1794
		1795	void
		1796	aio_group (SV *callback=&PL_sv_undef)
		1797	PROTOTYPE: ;$
		1798	PPCODE:
		1799	{
		1800	dREQ;
		1801
		1802	req->type = REQ_GROUP;
		1803
		1804	req_send (req);
		1805	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1806	}
		1807
		1808	void
		1809	aio_nop (SV *callback=&PL_sv_undef)
		1810	PPCODE:
		1811	{
		1812	dREQ;
		1813
		1814	req->type = REQ_NOP;
		1815
		1816	REQ_SEND;
		1817	}
		1818
		1819	int
		1820	aioreq_pri (int pri = 0)
		1821	PROTOTYPE: ;$
		1822	CODE:
		1823	RETVAL = next_pri - PRI_BIAS;
		1824	if (items > 0)
		1825	{
		1826	if (pri < PRI_MIN) pri = PRI_MIN;
		1827	if (pri > PRI_MAX) pri = PRI_MAX;
		1828	next_pri = pri + PRI_BIAS;
		1829	}
		1830	OUTPUT:
		1831	RETVAL
		1832
		1833	void
		1834	aioreq_nice (int nice = 0)
		1835	CODE:
		1836	nice = next_pri - nice;
		1837	if (nice < PRI_MIN) nice = PRI_MIN;
		1838	if (nice > PRI_MAX) nice = PRI_MAX;
		1839	next_pri = nice + PRI_BIAS;
		1840
		1841	void
1034	flush()	1842	flush ()
1035	PROTOTYPE:	1843	PROTOTYPE:
1036	CODE:	1844	CODE:
1037	while (nreqs)	1845	while (nreqs)
1038	{	1846	{
1039	poll_wait ();	1847	poll_wait ();
1040	poll_cb ();	1848	poll_cb ();
1041	}	1849	}
1042		1850
1043	void	1851	int
1044	poll()	1852	poll()
1045	PROTOTYPE:	1853	PROTOTYPE:
1046	CODE:	1854	CODE:
1047	if (nreqs)
1048	{
1049	poll_wait ();	1855	poll_wait ();
1050	poll_cb ();	1856	RETVAL = poll_cb ();
1051	}	1857	OUTPUT:
		1858	RETVAL
1052		1859
1053	int	1860	int
1054	poll_fileno()	1861	poll_fileno()
1055	PROTOTYPE:	1862	PROTOTYPE:
1056	CODE:	1863	CODE:
…		…
1068		1875
1069	void	1876	void
1070	poll_wait()	1877	poll_wait()
1071	PROTOTYPE:	1878	PROTOTYPE:
1072	CODE:	1879	CODE:
1073	if (nreqs)
1074	poll_wait ();	1880	poll_wait ();
		1881
		1882	void
		1883	setsig (int signum = SIGIO)
		1884	PROTOTYPE: ;$
		1885	CODE:
		1886	{
		1887	if (block_sig_level)
		1888	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1889
		1890	X_LOCK (reslock);
		1891	main_tid = pthread_self ();
		1892	main_sig = signum;
		1893	X_UNLOCK (reslock);
		1894
		1895	if (main_sig && npending)
		1896	pthread_kill (main_tid, main_sig);
		1897	}
		1898
		1899	void
		1900	aio_block (SV *cb)
		1901	PROTOTYPE: &
		1902	PPCODE:
		1903	{
		1904	int count;
		1905
		1906	block_sig ();
		1907	PUSHMARK (SP);
		1908	PUTBACK;
		1909	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1910	SPAGAIN;
		1911	unblock_sig ();
		1912
		1913	if (SvTRUE (ERRSV))
		1914	croak (0);
		1915
		1916	XSRETURN (count);
		1917	}
1075		1918
1076	int	1919	int
1077	nreqs()	1920	nreqs()
1078	PROTOTYPE:	1921	PROTOTYPE:
1079	CODE:	1922	CODE:
1080	RETVAL = nreqs;	1923	RETVAL = nreqs;
1081	OUTPUT:	1924	OUTPUT:
1082	RETVAL	1925	RETVAL
1083		1926
		1927	int
		1928	nready()
		1929	PROTOTYPE:
		1930	CODE:
		1931	RETVAL = get_nready ();
		1932	OUTPUT:
		1933	RETVAL
		1934
		1935	int
		1936	npending()
		1937	PROTOTYPE:
		1938	CODE:
		1939	RETVAL = get_npending ();
		1940	OUTPUT:
		1941	RETVAL
		1942
		1943	int
		1944	nthreads()
		1945	PROTOTYPE:
		1946	CODE:
		1947	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1948	RETVAL = started;
		1949	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1950	OUTPUT:
		1951	RETVAL
		1952
		1953	PROTOTYPES: DISABLE
		1954
		1955	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1956
		1957	void
		1958	cancel (aio_req_ornot req)
		1959	CODE:
		1960	req_cancel (req);
		1961
		1962	void
		1963	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1964	CODE:
		1965	SvREFCNT_dec (req->callback);
		1966	req->callback = newSVsv (callback);
		1967
		1968	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1969
		1970	void
		1971	add (aio_req grp, ...)
		1972	PPCODE:
		1973	{
		1974	int i;
		1975	aio_req req;
		1976
		1977	if (main_sig && !block_sig_level)
		1978	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1979
		1980	if (grp->int1 == 2)
		1981	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1982
		1983	for (i = 1; i < items; ++i )
		1984	{
		1985	if (GIMME_V != G_VOID)
		1986	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1987
		1988	req = SvAIO_REQ (ST (i));
		1989
		1990	if (req)
		1991	{
		1992	++grp->size;
		1993	req->grp = grp;
		1994
		1995	req->grp_prev = 0;
		1996	req->grp_next = grp->grp_first;
		1997
		1998	if (grp->grp_first)
		1999	grp->grp_first->grp_prev = req;
		2000
		2001	grp->grp_first = req;
		2002	}
		2003	}
		2004	}
		2005
		2006	void
		2007	cancel_subs (aio_req_ornot req)
		2008	CODE:
		2009	req_cancel_subs (req);
		2010
		2011	void
		2012	result (aio_req grp, ...)
		2013	CODE:
		2014	{
		2015	int i;
		2016	AV *av;
		2017
		2018	grp->errorno = errno;
		2019
		2020	av = newAV ();
		2021
		2022	for (i = 1; i < items; ++i )
		2023	av_push (av, newSVsv (ST (i)));
		2024
		2025	SvREFCNT_dec (grp->sv1);
		2026	grp->sv1 = (SV *)av;
		2027	}
		2028
		2029	void
		2030	errno (aio_req grp, int errorno = errno)
		2031	CODE:
		2032	grp->errorno = errorno;
		2033
		2034	void
		2035	limit (aio_req grp, int limit)
		2036	CODE:
		2037	grp->int2 = limit;
		2038	aio_grp_feed (grp);
		2039
		2040	void
		2041	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2042	CODE:
		2043	{
		2044	SvREFCNT_dec (grp->sv2);
		2045	grp->sv2 = newSVsv (callback);
		2046
		2047	if (grp->int2 <= 0)
		2048	grp->int2 = 2;
		2049
		2050	aio_grp_feed (grp);
		2051	}
		2052

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