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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.109 by root, Sat Oct 6 14:05:19 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>	9	#include <stddef.h>
11		10	#include <stdlib.h>
		11	#include <errno.h>
12	#include <sys/types.h>	12	#include <sys/types.h>
13	#include <sys/stat.h>	13	#include <sys/stat.h>
14
15	#include <unistd.h>	14	#include <limits.h>
16	#include <fcntl.h>	15	#include <fcntl.h>
17	#include <signal.h>
18	#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 send
		30	# undef recv
		31	# undef stat
		32	# undef fstat
		33	# define lstat stat
		34	# undef truncate
		35	# undef ftruncate
		36	# undef open
		37	# undef close
		38	# undef unlink
		39	# undef rmdir
		40	# undef rename
		41	# undef lseek
		42
		43	# define chown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchown(a,b,c) (errno = ENOSYS, -1)
		45	# define fchmod(a,b) (errno = ENOSYS, -1)
		46	# define symlink(a,b) (errno = ENOSYS, -1)
		47	# define readlink(a,b,c) (errno = ENOSYS, -1)
		48	# define mknod(a,b,c) (errno = ENOSYS, -1)
		49	# define truncate(a,b) (errno = ENOSYS, -1)
		50	# define ftruncate(fd,o) chsize ((fd), (o))
		51	# define fsync(fd) _commit (fd)
		52	# define opendir(fd) (errno = ENOSYS, 0)
		53	# define readdir(fd) (errno = ENOSYS, -1)
		54	# define closedir(fd) (errno = ENOSYS, -1)
		55	# define mkdir(a,b) mkdir (a)
		56
		57	#else
		58
		59	# include "autoconf/config.h"
		60	# include <sys/time.h>
		61	# include <sys/select.h>
		62	# include <unistd.h>
		63	# include <utime.h>
		64	# include <signal.h>
		65	typedef struct dirent X_DIRENT;
		66
		67	#endif
19		68
20	#if HAVE_SENDFILE	69	#if HAVE_SENDFILE
21	# if __linux	70	# if __linux
22	# include <sys/sendfile.h>	71	# include <sys/sendfile.h>
23	# elif __freebsd	72	# elif __freebsd
…		…
30	# else	79	# else
31	# error sendfile support requested but not available	80	# error sendfile support requested but not available
32	# endif	81	# endif
33	#endif	82	#endif
34		83
35	#if __ia64	84	/* number of seconds after which idle threads exit */
		85	#define IDLE_TIMEOUT 10
		86
		87	/* used for struct dirent, AIX doesn't provide it */
		88	#ifndef NAME_MAX
		89	# define NAME_MAX 4096
		90	#endif
		91
		92	/* buffer size for various temporary buffers */
36	# define STACKSIZE 65536	93	#define AIO_BUFSIZE 65536
		94
		95	/* use NV for 32 bit perls as it allows larger offsets */
		96	#if IVSIZE >= 8
		97	# define SvVAL64 SvIV
37	#else	98	#else
38	# define STACKSIZE 4096	99	# define SvVAL64 SvNV
39	#endif	100	#endif
		101
		102	static HV *stash;
		103
		104	#define dBUF \
		105	char *aio_buf; \
		106	X_LOCK (wrklock); \
		107	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		108	X_UNLOCK (wrklock); \
		109	if (!aio_buf) \
		110	return -1;
		111
		112	typedef SV SV8; /* byte-sv, used for argument-checking */
40		113
41	enum {	114	enum {
42	REQ_QUIT,	115	REQ_QUIT,
43	REQ_OPEN, REQ_CLOSE,	116	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,	117	REQ_READ, REQ_WRITE,
45	REQ_SENDFILE,	118	REQ_READAHEAD, REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	119	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		120	REQ_TRUNCATE, REQ_FTRUNCATE,
		121	REQ_UTIME, REQ_FUTIME,
		122	REQ_CHMOD, REQ_FCHMOD,
		123	REQ_CHOWN, REQ_FCHOWN,
47	REQ_FSYNC, REQ_FDATASYNC,	124	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,	125	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
49	REQ_SYMLINK,	126	REQ_MKNOD, REQ_READDIR,
		127	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		128	REQ_GROUP, REQ_NOP,
		129	REQ_BUSY,
50	};	130	};
51		131
		132	#define AIO_REQ_KLASS "IO::AIO::REQ"
		133	#define AIO_GRP_KLASS "IO::AIO::GRP"
		134
52	typedef struct aio_cb {	135	typedef struct aio_cb
		136	{
53	struct aio_cb *volatile next;	137	struct aio_cb *volatile next;
54		138
		139	SV *callback;
		140	SV *sv1, *sv2;
		141	void *ptr1, *ptr2;
		142	off_t offs;
		143	size_t size;
		144	ssize_t result;
		145	double nv1, nv2;
		146
		147	STRLEN stroffset;
55	int type;	148	int type;
56		149	int int1, int2, int3;
57	int fd, fd2;	150	int errorno;
58	off_t offset;
59	size_t length;
60	ssize_t result;
61	mode_t mode; /* open */	151	mode_t mode; /* open */
62	int errorno;
63	SV *data, *callback;
64	SV *fh, *fh2;
65	void *dataptr, *data2ptr;
66	STRLEN dataoffset;
67		152
68	Stat_t *statdata;	153	unsigned char flags;
		154	unsigned char pri;
		155
		156	SV *self; /* the perl counterpart of this request, if any */
		157	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
69	} aio_cb;	158	} aio_cb;
70		159
		160	enum {
		161	FLAG_CANCELLED = 0x01, /* request was cancelled */
		162	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		163	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		164	};
		165
71	typedef aio_cb *aio_req;	166	typedef aio_cb *aio_req;
		167	typedef aio_cb *aio_req_ornot;
72		168
		169	enum {
		170	PRI_MIN = -4,
		171	PRI_MAX = 4,
		172
		173	DEFAULT_PRI = 0,
		174	PRI_BIAS = -PRI_MIN,
		175	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		176	};
		177
		178	#define AIO_TICKS ((1000000 + 1023) >> 10)
		179
		180	static unsigned int max_poll_time = 0;
		181	static unsigned int max_poll_reqs = 0;
		182
		183	/* calculcate time difference in ~1/AIO_TICKS of a second */
		184	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		185	{
		186	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		187	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		188	}
		189
		190	static thread_t main_tid;
		191	static int main_sig;
		192	static int block_sig_level;
		193
		194	void block_sig ()
		195	{
		196	sigset_t ss;
		197
		198	if (block_sig_level++)
		199	return;
		200
		201	if (!main_sig)
		202	return;
		203
		204	sigemptyset (&ss);
		205	sigaddset (&ss, main_sig);
		206	pthread_sigmask (SIG_BLOCK, &ss, 0);
		207	}
		208
		209	void unblock_sig ()
		210	{
		211	sigset_t ss;
		212
		213	if (--block_sig_level)
		214	return;
		215
		216	if (!main_sig)
		217	return;
		218
		219	sigemptyset (&ss);
		220	sigaddset (&ss, main_sig);
		221	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		222	}
		223
		224	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		225
73	static int started, wanted;	226	static unsigned int started, idle, wanted;
74	static volatile int nreqs;
75	static int max_outstanding = 1<<30;
76	static int respipe [2];
77		227
		228	/* worker threads management */
		229	static mutex_t wrklock = X_MUTEX_INIT;
		230
		231	typedef struct worker {
		232	/* locked by wrklock */
		233	struct worker *prev, *next;
		234
		235	thread_t tid;
		236
		237	/* locked by reslock, reqlock or wrklock */
		238	aio_req req; /* currently processed request */
		239	void *dbuf;
		240	DIR *dirp;
		241	} worker;
		242
		243	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		244
		245	static void worker_clear (worker *wrk)
		246	{
		247	if (wrk->dirp)
		248	{
		249	closedir (wrk->dirp);
		250	wrk->dirp = 0;
		251	}
		252
		253	if (wrk->dbuf)
		254	{
		255	free (wrk->dbuf);
		256	wrk->dbuf = 0;
		257	}
		258	}
		259
		260	static void worker_free (worker *wrk)
		261	{
		262	wrk->next->prev = wrk->prev;
		263	wrk->prev->next = wrk->next;
		264
		265	free (wrk);
		266	}
		267
		268	static volatile unsigned int nreqs, nready, npending;
		269	static volatile unsigned int max_idle = 4;
		270	static volatile unsigned int max_outstanding = 0xffffffff;
		271	static int respipe_osf [2], respipe [2] = { -1, -1 };
		272
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	273	static mutex_t reslock = X_MUTEX_INIT;
79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	274	static mutex_t reqlock = X_MUTEX_INIT;
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	275	static cond_t reqwait = X_COND_INIT;
81		276
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	277	#if WORDACCESS_UNSAFE
83	static volatile aio_req ress, rese; /* queue start, queue end */
84		278
		279	static unsigned int get_nready ()
		280	{
		281	unsigned int retval;
		282
		283	X_LOCK (reqlock);
		284	retval = nready;
		285	X_UNLOCK (reqlock);
		286
		287	return retval;
		288	}
		289
		290	static unsigned int get_npending ()
		291	{
		292	unsigned int retval;
		293
		294	X_LOCK (reslock);
		295	retval = npending;
		296	X_UNLOCK (reslock);
		297
		298	return retval;
		299	}
		300
		301	static unsigned int get_nthreads ()
		302	{
		303	unsigned int retval;
		304
		305	X_LOCK (wrklock);
		306	retval = started;
		307	X_UNLOCK (wrklock);
		308
		309	return retval;
		310	}
		311
		312	#else
		313
		314	# define get_nready() nready
		315	# define get_npending() npending
		316	# define get_nthreads() started
		317
		318	#endif
		319
		320	/*
		321	* a somewhat faster data structure might be nice, but
		322	* with 8 priorities this actually needs <20 insns
		323	* per shift, the most expensive operation.
		324	*/
		325	typedef struct {
		326	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		327	int size;
		328	} reqq;
		329
		330	static reqq req_queue;
		331	static reqq res_queue;
		332
		333	int reqq_push (reqq *q, aio_req req)
		334	{
		335	int pri = req->pri;
		336	req->next = 0;
		337
		338	if (q->qe[pri])
		339	{
		340	q->qe[pri]->next = req;
		341	q->qe[pri] = req;
		342	}
		343	else
		344	q->qe[pri] = q->qs[pri] = req;
		345
		346	return q->size++;
		347	}
		348
		349	aio_req reqq_shift (reqq *q)
		350	{
		351	int pri;
		352
		353	if (!q->size)
		354	return 0;
		355
		356	--q->size;
		357
		358	for (pri = NUM_PRI; pri--; )
		359	{
		360	aio_req req = q->qs[pri];
		361
		362	if (req)
		363	{
		364	if (!(q->qs[pri] = req->next))
		365	q->qe[pri] = 0;
		366
		367	return req;
		368	}
		369	}
		370
		371	abort ();
		372	}
		373
		374	static int poll_cb ();
		375	static int req_invoke (aio_req req);
		376	static void req_destroy (aio_req req);
85	static void free_req (aio_req req)	377	static void req_cancel (aio_req req);
		378
		379	/* must be called at most once */
		380	static SV *req_sv (aio_req req, const char *klass)
86	{	381	{
		382	if (!req->self)
		383	{
		384	req->self = (SV *)newHV ();
		385	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		386	}
		387
		388	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		389	}
		390
		391	static aio_req SvAIO_REQ (SV *sv)
		392	{
		393	MAGIC *mg;
		394
		395	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		396	croak ("object of class " AIO_REQ_KLASS " expected");
		397
		398	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		399
		400	return mg ? (aio_req)mg->mg_ptr : 0;
		401	}
		402
		403	static void aio_grp_feed (aio_req grp)
		404	{
		405	block_sig ();
		406
		407	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		408	{
		409	int old_len = grp->size;
		410
		411	if (grp->sv2 && SvOK (grp->sv2))
		412	{
		413	dSP;
		414
		415	ENTER;
		416	SAVETMPS;
		417	PUSHMARK (SP);
		418	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		419	PUTBACK;
		420	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		421	SPAGAIN;
		422	FREETMPS;
		423	LEAVE;
		424	}
		425
		426	/* stop if no progress has been made */
		427	if (old_len == grp->size)
		428	{
		429	SvREFCNT_dec (grp->sv2);
		430	grp->sv2 = 0;
		431	break;
		432	}
		433	}
		434
		435	unblock_sig ();
		436	}
		437
		438	static void aio_grp_dec (aio_req grp)
		439	{
		440	--grp->size;
		441
		442	/* call feeder, if applicable */
		443	aio_grp_feed (grp);
		444
		445	/* finish, if done */
		446	if (!grp->size && grp->int1)
		447	{
		448	block_sig ();
		449
		450	if (!req_invoke (grp))
		451	{
		452	req_destroy (grp);
		453	unblock_sig ();
		454	croak (0);
		455	}
		456
		457	req_destroy (grp);
		458	unblock_sig ();
		459	}
		460	}
		461
		462	static int req_invoke (aio_req req)
		463	{
		464	dSP;
		465
		466	if (req->flags & FLAG_SV2_RO_OFF)
		467	SvREADONLY_off (req->sv2);
		468
		469	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		470	{
		471	ENTER;
		472	SAVETMPS;
		473	PUSHMARK (SP);
		474	EXTEND (SP, 1);
		475
		476	switch (req->type)
		477	{
		478	case REQ_READDIR:
		479	{
		480	SV *rv = &PL_sv_undef;
		481
		482	if (req->result >= 0)
		483	{
		484	int i;
		485	char *buf = req->ptr2;
		486	AV *av = newAV ();
		487
		488	av_extend (av, req->result - 1);
		489
		490	for (i = 0; i < req->result; ++i)
		491	{
		492	SV *sv = newSVpv (buf, 0);
		493
		494	av_store (av, i, sv);
		495	buf += SvCUR (sv) + 1;
		496	}
		497
		498	rv = sv_2mortal (newRV_noinc ((SV *)av));
		499	}
		500
		501	PUSHs (rv);
		502	}
		503	break;
		504
		505	case REQ_OPEN:
		506	{
		507	/* convert fd to fh */
		508	SV *fh = &PL_sv_undef;
		509
		510	if (req->result >= 0)
		511	{
		512	GV *gv = (GV *)sv_newmortal ();
		513	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		514	char sym [64];
		515	int symlen;
		516
		517	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		518	gv_init (gv, stash, sym, symlen, 0);
		519
		520	symlen = snprintf (
		521	sym,
		522	sizeof (sym),
		523	"%s&=%d",
		524	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		525	req->result
		526	);
		527
		528	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		529	fh = (SV *)gv;
		530	}
		531
		532	PUSHs (fh);
		533	}
		534	break;
		535
		536	case REQ_GROUP:
		537	req->int1 = 2; /* mark group as finished */
		538
		539	if (req->sv1)
		540	{
		541	int i;
		542	AV *av = (AV *)req->sv1;
		543
		544	EXTEND (SP, AvFILL (av) + 1);
		545	for (i = 0; i <= AvFILL (av); ++i)
		546	PUSHs (*av_fetch (av, i, 0));
		547	}
		548	break;
		549
		550	case REQ_NOP:
		551	case REQ_BUSY:
		552	break;
		553
		554	case REQ_READLINK:
		555	if (req->result > 0)
		556	{
		557	SvCUR_set (req->sv2, req->result);
		558	*SvEND (req->sv2) = 0;
		559	PUSHs (req->sv2);
		560	}
		561	break;
		562
		563	case REQ_STAT:
		564	case REQ_LSTAT:
		565	case REQ_FSTAT:
		566	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		567	PL_laststatval = req->result;
		568	PL_statcache = *(Stat_t *)(req->ptr2);
		569	PUSHs (sv_2mortal (newSViv (req->result)));
		570	break;
		571
		572	case REQ_READ:
		573	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		574	*SvEND (req->sv2) = 0;
		575	PUSHs (sv_2mortal (newSViv (req->result)));
		576	break;
		577
		578	default:
		579	PUSHs (sv_2mortal (newSViv (req->result)));
		580	break;
		581	}
		582
		583	errno = req->errorno;
		584
		585	PUTBACK;
		586	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		587	SPAGAIN;
		588
		589	FREETMPS;
		590	LEAVE;
		591
		592	PUTBACK;
		593	}
		594
87	if (req->data)	595	if (req->grp)
88	SvREFCNT_dec (req->data);	596	{
		597	aio_req grp = req->grp;
89		598
		599	/* unlink request */
		600	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		601	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		602
		603	if (grp->grp_first == req)
		604	grp->grp_first = req->grp_next;
		605
		606	aio_grp_dec (grp);
		607	}
		608
		609	return !SvTRUE (ERRSV);
		610	}
		611
		612	static void req_destroy (aio_req req)
		613	{
90	if (req->fh)	614	if (req->self)
		615	{
		616	sv_unmagic (req->self, PERL_MAGIC_ext);
91	SvREFCNT_dec (req->fh);	617	SvREFCNT_dec (req->self);
		618	}
92		619
93	if (req->fh2)	620	SvREFCNT_dec (req->sv1);
94	SvREFCNT_dec (req->fh2);	621	SvREFCNT_dec (req->sv2);
95
96	if (req->statdata)
97	Safefree (req->statdata);
98
99	if (req->callback)
100	SvREFCNT_dec (req->callback);	622	SvREFCNT_dec (req->callback);
		623
		624	if (req->flags & FLAG_PTR2_FREE)
		625	free (req->ptr2);
101		626
102	Safefree (req);	627	Safefree (req);
103	}	628	}
104		629
		630	static void req_cancel_subs (aio_req grp)
		631	{
		632	aio_req sub;
		633
		634	if (grp->type != REQ_GROUP)
		635	return;
		636
		637	SvREFCNT_dec (grp->sv2);
		638	grp->sv2 = 0;
		639
		640	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		641	req_cancel (sub);
		642	}
		643
		644	static void req_cancel (aio_req req)
		645	{
		646	req->flags |= FLAG_CANCELLED;
		647
		648	req_cancel_subs (req);
		649	}
		650
		651	#ifdef USE_SOCKETS_AS_HANDLES
		652	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		653	#else
		654	# define TO_SOCKET(x) (x)
		655	#endif
		656
105	static void	657	static void
106	poll_wait ()	658	create_respipe ()
107	{	659	{
108	if (nreqs && !ress)	660	int old_readfd = respipe [0];
		661
		662	if (respipe [1] >= 0)
		663	respipe_close (TO_SOCKET (respipe [1]));
		664
		665	#ifdef _WIN32
		666	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		667	#else
		668	if (pipe (respipe))
		669	#endif
		670	croak ("unable to initialize result pipe");
		671
		672	if (old_readfd >= 0)
109	{	673	{
110	fd_set rfd;	674	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
111	FD_ZERO(&rfd);	675	croak ("unable to initialize result pipe(2)");
112	FD_SET(respipe [0], &rfd);
113		676
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	677	respipe_close (respipe [0]);
		678	respipe [0] = old_readfd;
115	}	679	}
116	}
117		680
118	static int	681	#ifdef _WIN32
119	poll_cb ()	682	int arg = 1;
		683	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		684	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		685	#else
		686	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		687	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		688	#endif
		689	croak ("unable to initialize result pipe(3)");
		690
		691	respipe_osf [0] = TO_SOCKET (respipe [0]);
		692	respipe_osf [1] = TO_SOCKET (respipe [1]);
		693	}
		694
		695	X_THREAD_PROC (aio_proc);
		696
		697	static void start_thread (void)
		698	{
		699	worker *wrk = calloc (1, sizeof (worker));
		700
		701	if (!wrk)
		702	croak ("unable to allocate worker thread data");
		703
		704	X_LOCK (wrklock);
		705
		706	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
		707	{
		708	wrk->prev = &wrk_first;
		709	wrk->next = wrk_first.next;
		710	wrk_first.next->prev = wrk;
		711	wrk_first.next = wrk;
		712	++started;
		713	}
		714	else
		715	free (wrk);
		716
		717	X_UNLOCK (wrklock);
		718	}
		719
		720	static void maybe_start_thread ()
		721	{
		722	if (get_nthreads () >= wanted)
		723	return;
		724
		725	/* todo: maybe use idle here, but might be less exact */
		726	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		727	return;
		728
		729	start_thread ();
		730	}
		731
		732	static void req_send (aio_req req)
		733	{
		734	block_sig ();
		735
		736	++nreqs;
		737
		738	X_LOCK (reqlock);
		739	++nready;
		740	reqq_push (&req_queue, req);
		741	X_COND_SIGNAL (reqwait);
		742	X_UNLOCK (reqlock);
		743
		744	unblock_sig ();
		745
		746	maybe_start_thread ();
		747	}
		748
		749	static void end_thread (void)
		750	{
		751	aio_req req;
		752
		753	Newz (0, req, 1, aio_cb);
		754
		755	req->type = REQ_QUIT;
		756	req->pri = PRI_MAX + PRI_BIAS;
		757
		758	X_LOCK (reqlock);
		759	reqq_push (&req_queue, req);
		760	X_COND_SIGNAL (reqwait);
		761	X_UNLOCK (reqlock);
		762
		763	X_LOCK (wrklock);
		764	--started;
		765	X_UNLOCK (wrklock);
		766	}
		767
		768	static void set_max_idle (int nthreads)
		769	{
		770	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		771	max_idle = nthreads <= 0 ? 1 : nthreads;
		772	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		773	}
		774
		775	static void min_parallel (int nthreads)
		776	{
		777	if (wanted < nthreads)
		778	wanted = nthreads;
		779	}
		780
		781	static void max_parallel (int nthreads)
		782	{
		783	if (wanted > nthreads)
		784	wanted = nthreads;
		785
		786	while (started > wanted)
		787	end_thread ();
		788	}
		789
		790	static void poll_wait ()
		791	{
		792	fd_set rfd;
		793
		794	while (nreqs)
		795	{
		796	int size;
		797	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		798	size = res_queue.size;
		799	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		800
		801	if (size)
		802	return;
		803
		804	maybe_start_thread ();
		805
		806	FD_ZERO (&rfd);
		807	FD_SET (respipe [0], &rfd);
		808
		809	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		810	}
		811	}
		812
		813	static int poll_cb ()
120	{	814	{
121	dSP;	815	dSP;
122	int count = 0;	816	int count = 0;
		817	int maxreqs = max_poll_reqs;
123	int do_croak = 0;	818	int do_croak = 0;
		819	struct timeval tv_start, tv_now;
124	aio_req req;	820	aio_req req;
		821
		822	if (max_poll_time)
		823	gettimeofday (&tv_start, 0);
		824
		825	block_sig ();
125		826
126	for (;;)	827	for (;;)
127	{	828	{
128	pthread_mutex_lock (&reslock);	829	for (;;)
129	req = ress;
130
131	if (req)
132	{	830	{
133	ress = req->next;	831	maybe_start_thread ();
134		832
		833	X_LOCK (reslock);
		834	req = reqq_shift (&res_queue);
		835
135	if (!ress)	836	if (req)
136	{	837	{
		838	--npending;
		839
		840	if (!res_queue.size)
		841	{
137	/* read any signals sent by the worker threads */	842	/* read any signals sent by the worker threads */
138	char buf [32];	843	char buf [4];
139	while (read (respipe [0], buf, 32) == 32)	844	while (respipe_read (respipe [0], buf, 4) == 4)
		845	;
140	;	846	}
		847	}
141		848
		849	X_UNLOCK (reslock);
		850
		851	if (!req)
		852	break;
		853
		854	--nreqs;
		855
		856	if (req->type == REQ_GROUP && req->size)
		857	{
		858	req->int1 = 1; /* mark request as delayed */
		859	continue;
		860	}
		861	else
		862	{
		863	if (!req_invoke (req))
		864	{
		865	req_destroy (req);
		866	unblock_sig ();
		867	croak (0);
		868	}
		869
		870	count++;
		871	}
		872
		873	req_destroy (req);
		874
		875	if (maxreqs && !--maxreqs)
		876	break;
		877
		878	if (max_poll_time)
		879	{
		880	gettimeofday (&tv_now, 0);
		881
		882	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
142	rese = 0;	883	break;
143	}	884	}
144	}	885	}
145		886
146	pthread_mutex_unlock (&reslock);	887	if (nreqs <= max_outstanding)
147
148	if (!req)
149	break;	888	break;
150		889
151	nreqs--;	890	poll_wait ();
152		891
153	if (req->type == REQ_QUIT)	892	++maxreqs;
154	started--;
155	else
156	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162
163	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);
165
166	if (req->statdata)
167	{
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);
171	}
172
173	ENTER;
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176
177	if (req->type == REQ_OPEN)
178	{
179	/* convert fd to fh */
180	SV *fh;
181
182	PUTBACK;
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
184	SPAGAIN;
185
186	fh = SvREFCNT_inc (POPs);
187
188	PUSHMARK (SP);
189	XPUSHs (sv_2mortal (fh));
190	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID | G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{
200	free_req (req);
201	croak (0);
202	}
203	}
204
205	LEAVE;
206
207	errno = errorno;
208	count++;
209	}
210
211	free_req (req);
212	}	893	}
213		894
		895	unblock_sig ();
214	return count;	896	return count;
215	}	897	}
216
217	static void *aio_proc(void *arg);
218
219	static void
220	start_thread (void)
221	{
222	sigset_t fullsigset, oldsigset;
223	pthread_t tid;
224	pthread_attr_t attr;
225
226	pthread_attr_init (&attr);
227	pthread_attr_setstacksize (&attr, STACKSIZE);
228	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
229
230	sigfillset (&fullsigset);
231	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
232
233	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
234	started++;
235
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}
238
239	static void
240	send_req (aio_req req)
241	{
242	while (started < wanted && nreqs >= started)
243	start_thread ();
244
245	nreqs++;
246
247	pthread_mutex_lock (&reqlock);
248
249	req->next = 0;
250
251	if (reqe)
252	{
253	reqe->next = req;
254	reqe = req;
255	}
256	else
257	reqe = reqs = req;
258
259	pthread_cond_signal (&reqwait);
260	pthread_mutex_unlock (&reqlock);
261
262	if (nreqs > max_outstanding)
263	for (;;)
264	{
265	poll_cb ();
266
267	if (nreqs <= max_outstanding)
268	break;
269
270	poll_wait ();
271	}
272	}
273
274	static void
275	end_thread (void)
276	{
277	aio_req req;
278	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;
280
281	send_req (req);
282	}
283
284	static void min_parallel (int nthreads)
285	{
286	if (wanted < nthreads)
287	wanted = nthreads;
288	}
289
290	static void max_parallel (int nthreads)
291	{
292	int cur = started;
293
294	if (wanted > nthreads)
295	wanted = nthreads;
296
297	while (cur > wanted)
298	{
299	end_thread ();
300	cur--;
301	}
302
303	while (started > wanted)
304	{
305	poll_wait ();
306	poll_cb ();
307	}
308	}
309
310	static void create_pipe ()
311	{
312	if (pipe (respipe))
313	croak ("unable to initialize result pipe");
314
315	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
316	croak ("cannot set result pipe to nonblocking mode");
317
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");
320	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}
333
334	static void atfork_child (void)
335	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();
361
362	atfork_parent ();
363	}
364
365	/* currently noops */
366	#define LOCK_FD(fd) do { } while (0)
367	#define UNLOCK_FD(fd) do { } while (0)
368		898
369	/*****************************************************************************/	899	/*****************************************************************************/
370	/* work around various missing functions */	900	/* work around various missing functions */
371		901
372	#if !HAVE_PREADWRITE	902	#if !HAVE_PREADWRITE
…		…
376	/*	906	/*
377	* make our pread/pwrite safe against themselves, but not against	907	* make our pread/pwrite safe against themselves, but not against
378	* normal read/write by using a mutex. slows down execution a lot,	908	* normal read/write by using a mutex. slows down execution a lot,
379	* but that's your problem, not mine.	909	* but that's your problem, not mine.
380	*/	910	*/
381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	911	static mutex_t preadwritelock = X_MUTEX_INIT;
382		912
383	static ssize_t	913	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
384	pread (int fd, void *buf, size_t count, off_t offset)
385	{	914	{
386	ssize_t res;	915	ssize_t res;
387	off_t ooffset;	916	off_t ooffset;
388		917
389	LOCK_FD (fd);	918	X_LOCK (preadwritelock);
390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
391	ooffset = lseek (fd, 0, SEEK_CUR);	919	ooffset = lseek (fd, 0, SEEK_CUR);
392	lseek (fd, offset, SEEK_SET);	920	lseek (fd, offset, SEEK_SET);
393	res = read (fd, buf, count);	921	res = read (fd, buf, count);
394	lseek (fd, ooffset, SEEK_SET);	922	lseek (fd, ooffset, SEEK_SET);
395	pthread_mutex_unlock (&iolock);	923	X_UNLOCK (preadwritelock);
396	UNLOCK_FD (d);
397		924
398	return res;	925	return res;
399	}	926	}
400		927
401	static ssize_t
402	pwrite (int fd, void *buf, size_t count, off_t offset)	928	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
403	{	929	{
404	ssize_t res;	930	ssize_t res;
405	off_t ooffset;	931	off_t ooffset;
406		932
407	LOCK_FD (fd);	933	X_LOCK (preadwritelock);
408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
409	ooffset = lseek (fd, 0, SEEK_CUR);	934	ooffset = lseek (fd, 0, SEEK_CUR);
410	lseek (fd, offset, SEEK_SET);	935	lseek (fd, offset, SEEK_SET);
411	res = write (fd, buf, count);	936	res = write (fd, buf, count);
412	lseek (fd, offset, SEEK_SET);	937	lseek (fd, offset, SEEK_SET);
413	pthread_mutex_unlock (&iolock);	938	X_UNLOCK (preadwritelock);
414	UNLOCK_FD (d);
415		939
416	return res;	940	return res;
417	}	941	}
		942	#endif
		943
		944	#ifndef HAVE_FUTIMES
		945
		946	# define utimes(path,times) aio_utimes (path, times)
		947	# define futimes(fd,times) aio_futimes (fd, times)
		948
		949	int aio_utimes (const char *filename, const struct timeval times[2])
		950	{
		951	if (times)
		952	{
		953	struct utimbuf buf;
		954
		955	buf.actime = times[0].tv_sec;
		956	buf.modtime = times[1].tv_sec;
		957
		958	return utime (filename, &buf);
		959	}
		960	else
		961	return utime (filename, 0);
		962	}
		963
		964	int aio_futimes (int fd, const struct timeval tv[2])
		965	{
		966	errno = ENOSYS;
		967	return -1;
		968	}
		969
418	#endif	970	#endif
419		971
420	#if !HAVE_FDATASYNC	972	#if !HAVE_FDATASYNC
421	# define fdatasync fsync	973	# define fdatasync fsync
422	#endif	974	#endif
423		975
424	#if !HAVE_READAHEAD	976	#if !HAVE_READAHEAD
425	# define readahead aio_readahead	977	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
426		978
427	static char readahead_buf[4096];	979	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
428
429	static ssize_t
430	readahead (int fd, off_t offset, size_t count)
431	{	980	{
		981	size_t todo = count;
		982	dBUF;
		983
432	while (count > 0)	984	while (todo > 0)
433	{	985	{
434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	986	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
435		987
436	pread (fd, readahead_buf, len, offset);	988	pread (fd, aio_buf, len, offset);
437	offset += len;	989	offset += len;
438	count -= len;	990	todo -= len;
439	}	991	}
440		992
441	errno = 0;	993	errno = 0;
		994	return count;
442	}	995	}
		996
443	#endif	997	#endif
444		998
		999	#if !HAVE_READDIR_R
		1000	# define readdir_r aio_readdir_r
		1001
		1002	static mutex_t readdirlock = X_MUTEX_INIT;
		1003
		1004	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
		1005	{
		1006	X_DIRENT *e;
		1007	int errorno;
		1008
		1009	X_LOCK (readdirlock);
		1010
		1011	e = readdir (dirp);
		1012	errorno = errno;
		1013
		1014	if (e)
		1015	{
		1016	*res = ent;
		1017	strcpy (ent->d_name, e->d_name);
		1018	}
		1019	else
		1020	*res = 0;
		1021
		1022	X_UNLOCK (readdirlock);
		1023
		1024	errno = errorno;
		1025	return e ? 0 : -1;
		1026	}
		1027	#endif
		1028
445	/* sendfile always needs emulation */	1029	/* sendfile always needs emulation */
446	static ssize_t
447	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	1030	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
448	{	1031	{
449	ssize_t res;	1032	ssize_t res;
450		1033
451	if (!count)	1034	if (!count)
452	return 0;	1035	return 0;
453
454	LOCK_FD (ofd);
455		1036
456	#if HAVE_SENDFILE	1037	#if HAVE_SENDFILE
457	# if __linux	1038	# if __linux
458	res = sendfile (ofd, ifd, &offset, count);	1039	res = sendfile (ofd, ifd, &offset, count);
459		1040
460	# elif __freebsd	1041	# elif __freebsd
461	/*	1042	/*
462	* Of course, the freebsd sendfile is a dire hack with no thoughts	1043	* Of course, the freebsd sendfile is a dire hack with no thoughts
463	* wasted on making it similar to other I/O functions.	1044	* wasted on making it similar to other I/O functions.
464	*/	1045	*/
465	{	1046	{
466	off_t sbytes;	1047	off_t sbytes;
467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1048	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
468		1049
469	if (res < 0 && sbytes)	1050	if (res < 0 && sbytes)
470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	1051	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
471	res = sbytes;	1052	res = sbytes;
472	}	1053	}
473		1054
474	# elif __hpux	1055	# elif __hpux
475	res = sendfile (ofd, ifd, offset, count, 0, 0);	1056	res = sendfile (ofd, ifd, offset, count, 0, 0);
476		1057
477	# elif __solaris	1058	# elif __solaris
478	{	1059	{
479	struct sendfilevec vec;	1060	struct sendfilevec vec;
480	size_t sbytes;	1061	size_t sbytes;
481		1062
482	vec.sfv_fd = ifd;	1063	vec.sfv_fd = ifd;
483	vec.sfv_flag = 0;	1064	vec.sfv_flag = 0;
484	vec.sfv_off = offset;	1065	vec.sfv_off = offset;
485	vec.sfv_len = count;	1066	vec.sfv_len = count;
486		1067
487	res = sendfilev (ofd, &vec, 1, &sbytes);	1068	res = sendfilev (ofd, &vec, 1, &sbytes);
488		1069
489	if (res < 0 && sbytes)	1070	if (res < 0 && sbytes)
490	res = sbytes;	1071	res = sbytes;
491	}	1072	}
492		1073
493	# else
494	res = -1;
495	errno = ENOSYS;
496	# endif	1074	# endif
		1075	#else
		1076	res = -1;
		1077	errno = ENOSYS;
497	#endif	1078	#endif
498		1079
499	if (res < 0	1080	if (res < 0
500	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1081	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
501	#if __solaris	1082	#if __solaris
502	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1083	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
503	#endif	1084	#endif
504	)	1085	)
505	)	1086	)
506	{	1087	{
507	/* emulate sendfile. this is a major pain in the ass */	1088	/* emulate sendfile. this is a major pain in the ass */
508	char *buf = malloc (4096);	1089	dBUF;
		1090
509	res = 0;	1091	res = 0;
510		1092
511	for (;;)	1093	while (count)
512	{	1094	{
513	ssize_t cnt;	1095	ssize_t cnt;
514		1096
515	cnt = pread (ifd, buf, 4096, offset);	1097	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
516		1098
517	if (cnt <= 0)	1099	if (cnt <= 0)
518	{	1100	{
519	if (cnt && !res) res = -1;	1101	if (cnt && !res) res = -1;
520	break;	1102	break;
521	}	1103	}
522		1104
523	cnt = write (ofd, buf, cnt);	1105	cnt = write (ofd, aio_buf, cnt);
524		1106
525	if (cnt <= 0)	1107	if (cnt <= 0)
526	{	1108	{
527	if (cnt && !res) res = -1;	1109	if (cnt && !res) res = -1;
528	break;	1110	break;
529	}	1111	}
530		1112
531	offset += cnt;	1113	offset += cnt;
532	res += cnt;	1114	res += cnt;
		1115	count -= cnt;
533	}	1116	}
534
535	{
536	int errorno = errno;
537	free (buf);
538	errno = errorno;
539	}
540	}	1117	}
541		1118
542	UNLOCK_FD (ofd);
543
544	return res;	1119	return res;
		1120	}
		1121
		1122	/* read a full directory */
		1123	static void scandir_ (aio_req req, worker *self)
		1124	{
		1125	DIR *dirp;
		1126	union
		1127	{
		1128	X_DIRENT d;
		1129	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
		1130	} *u;
		1131	X_DIRENT *entp;
		1132	char *name, *names;
		1133	int memlen = 4096;
		1134	int memofs = 0;
		1135	int res = 0;
		1136
		1137	X_LOCK (wrklock);
		1138	self->dirp = dirp = opendir (req->ptr1);
		1139	self->dbuf = u = malloc (sizeof (*u));
		1140	req->flags |= FLAG_PTR2_FREE;
		1141	req->ptr2 = names = malloc (memlen);
		1142	X_UNLOCK (wrklock);
		1143
		1144	if (dirp && u && names)
		1145	for (;;)
		1146	{
		1147	errno = 0;
		1148	readdir_r (dirp, &u->d, &entp);
		1149
		1150	if (!entp)
		1151	break;
		1152
		1153	name = entp->d_name;
		1154
		1155	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1156	{
		1157	int len = strlen (name) + 1;
		1158
		1159	res++;
		1160
		1161	while (memofs + len > memlen)
		1162	{
		1163	memlen *= 2;
		1164	X_LOCK (wrklock);
		1165	req->ptr2 = names = realloc (names, memlen);
		1166	X_UNLOCK (wrklock);
		1167
		1168	if (!names)
		1169	break;
		1170	}
		1171
		1172	memcpy (names + memofs, name, len);
		1173	memofs += len;
		1174	}
		1175	}
		1176
		1177	if (errno)
		1178	res = -1;
		1179
		1180	req->result = res;
545	}	1181	}
546		1182
547	/*****************************************************************************/	1183	/*****************************************************************************/
548		1184
549	static void *	1185	X_THREAD_PROC (aio_proc)
550	aio_proc (void *thr_arg)
551	{	1186	{
		1187	{//D
552	aio_req req;	1188	aio_req req;
553	int type;	1189	struct timespec ts;
		1190	worker *self = (worker *)thr_arg;
554		1191
555	do	1192	/* try to distribute timeouts somewhat randomly */
		1193	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
		1194
		1195	for (;;)
556	{	1196	{
557	pthread_mutex_lock (&reqlock);	1197	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1198
		1199	X_LOCK (reqlock);
558		1200
559	for (;;)	1201	for (;;)
560	{	1202	{
561	req = reqs;	1203	self->req = req = reqq_shift (&req_queue);
562
563	if (reqs)
564	{
565	reqs = reqs->next;
566	if (!reqs) reqe = 0;
567	}
568		1204
569	if (req)	1205	if (req)
570	break;	1206	break;
571		1207
572	pthread_cond_wait (&reqwait, &reqlock);	1208	++idle;
		1209
		1210	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
		1211	== ETIMEDOUT)
		1212	{
		1213	if (idle > max_idle)
		1214	{
		1215	--idle;
		1216	X_UNLOCK (reqlock);
		1217	X_LOCK (wrklock);
		1218	--started;
		1219	X_UNLOCK (wrklock);
		1220	goto quit;
		1221	}
		1222
		1223	/* we are allowed to idle, so do so without any timeout */
		1224	X_COND_WAIT (reqwait, reqlock);
		1225	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1226	}
		1227
		1228	--idle;
573	}	1229	}
574		1230
575	pthread_mutex_unlock (&reqlock);	1231	--nready;
		1232
		1233	X_UNLOCK (reqlock);
576		1234
577	errno = 0; /* strictly unnecessary */	1235	errno = 0; /* strictly unnecessary */
578		1236
579	type = req->type;	1237	if (!(req->flags & FLAG_CANCELLED))
580
581	switch (type)	1238	switch (req->type)
		1239	{
		1240	case REQ_READ: req->result = req->offs >= 0
		1241	? pread (req->int1, req->ptr1, req->size, req->offs)
		1242	: read (req->int1, req->ptr1, req->size); break;
		1243	case REQ_WRITE: req->result = req->offs >= 0
		1244	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1245	: write (req->int1, req->ptr1, req->size); break;
		1246
		1247	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1248	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1249
		1250	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1251	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1252	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1253
		1254	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1255	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1256	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1257	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1258	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1259	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1260
		1261	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1262	case REQ_CLOSE: req->result = close (req->int1); break;
		1263	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1264	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1265	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1266	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1267	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1268	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1269	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1270	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1271
		1272	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1273	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1274	case REQ_READDIR: scandir_ (req, self); break;
		1275
		1276	case REQ_BUSY:
		1277	#ifdef _WIN32
		1278	Sleep (req->nv1 * 1000.);
		1279	#else
		1280	{
		1281	struct timeval tv;
		1282
		1283	tv.tv_sec = req->nv1;
		1284	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1285
		1286	req->result = select (0, 0, 0, 0, &tv);
		1287	}
		1288	#endif
		1289	break;
		1290
		1291	case REQ_UTIME:
		1292	case REQ_FUTIME:
		1293	{
		1294	struct timeval tv[2];
		1295	struct timeval *times;
		1296
		1297	if (req->nv1 != -1. || req->nv2 != -1.)
		1298	{
		1299	tv[0].tv_sec = req->nv1;
		1300	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1301	tv[1].tv_sec = req->nv2;
		1302	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1303
		1304	times = tv;
		1305	}
		1306	else
		1307	times = 0;
		1308
		1309
		1310	req->result = req->type == REQ_FUTIME
		1311	? futimes (req->int1, times)
		1312	: utimes (req->ptr1, times);
		1313	}
		1314
		1315	case REQ_GROUP:
		1316	case REQ_NOP:
		1317	break;
		1318
		1319	case REQ_QUIT:
		1320	goto quit;
		1321
		1322	default:
		1323	req->result = -1;
		1324	break;
		1325	}
		1326
		1327	req->errorno = errno;
		1328
		1329	X_LOCK (reslock);
		1330
		1331	++npending;
		1332
		1333	if (!reqq_push (&res_queue, req))
582	{	1334	{
583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1335	/* write a dummy byte to the pipe so fh becomes ready */
584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1336	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
585		1337
586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1338	/* optionally signal the main thread asynchronously */
587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1339	if (main_sig)
588		1340	pthread_kill (main_tid, main_sig);
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
592
593	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
594	case REQ_CLOSE: req->result = close (req->fd); break;
595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
596	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
598
599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
600	case REQ_FSYNC: req->result = fsync (req->fd); break;
601
602	case REQ_QUIT:
603	break;
604
605	default:
606	req->result = ENOSYS;
607	break;
608	}	1341	}
609		1342
610	req->errorno = errno;	1343	self->req = 0;
		1344	worker_clear (self);
611		1345
612	pthread_mutex_lock (&reslock);	1346	X_UNLOCK (reslock);
613
614	req->next = 0;
615
616	if (rese)
617	{
618	rese->next = req;
619	rese = req;
620	}
621	else
622	{
623	rese = ress = req;
624
625	/* write a dummy byte to the pipe so fh becomes ready */
626	write (respipe [1], &respipe, 1);
627	}
628
629	pthread_mutex_unlock (&reslock);
630	}	1347	}
631	while (type != REQ_QUIT);	1348
		1349	quit:
		1350	X_LOCK (wrklock);
		1351	worker_free (self);
		1352	X_UNLOCK (wrklock);
632		1353
633	return 0;	1354	return 0;
		1355	}//D
		1356	}
		1357
		1358	/*****************************************************************************/
		1359
		1360	static void atfork_prepare (void)
		1361	{
		1362	X_LOCK (wrklock);
		1363	X_LOCK (reqlock);
		1364	X_LOCK (reslock);
		1365	#if !HAVE_PREADWRITE
		1366	X_LOCK (preadwritelock);
		1367	#endif
		1368	#if !HAVE_READDIR_R
		1369	X_LOCK (readdirlock);
		1370	#endif
		1371	}
		1372
		1373	static void atfork_parent (void)
		1374	{
		1375	#if !HAVE_READDIR_R
		1376	X_UNLOCK (readdirlock);
		1377	#endif
		1378	#if !HAVE_PREADWRITE
		1379	X_UNLOCK (preadwritelock);
		1380	#endif
		1381	X_UNLOCK (reslock);
		1382	X_UNLOCK (reqlock);
		1383	X_UNLOCK (wrklock);
		1384	}
		1385
		1386	static void atfork_child (void)
		1387	{
		1388	aio_req prv;
		1389
		1390	while (prv = reqq_shift (&req_queue))
		1391	req_destroy (prv);
		1392
		1393	while (prv = reqq_shift (&res_queue))
		1394	req_destroy (prv);
		1395
		1396	while (wrk_first.next != &wrk_first)
		1397	{
		1398	worker *wrk = wrk_first.next;
		1399
		1400	if (wrk->req)
		1401	req_destroy (wrk->req);
		1402
		1403	worker_clear (wrk);
		1404	worker_free (wrk);
		1405	}
		1406
		1407	started = 0;
		1408	idle = 0;
		1409	nreqs = 0;
		1410	nready = 0;
		1411	npending = 0;
		1412
		1413	create_respipe ();
		1414
		1415	atfork_parent ();
634	}	1416	}
635		1417
636	#define dREQ \	1418	#define dREQ \
637	aio_req req; \	1419	aio_req req; \
		1420	int req_pri = next_pri; \
		1421	next_pri = DEFAULT_PRI + PRI_BIAS; \
638	\	1422	\
639	if (SvOK (callback) && !SvROK (callback)) \	1423	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	1424	croak ("callback must be undef or of reference type"); \
641	\	1425	\
642	Newz (0, req, 1, aio_cb); \	1426	Newz (0, req, 1, aio_cb); \
643	if (!req) \	1427	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	1428	croak ("out of memory during aio_req allocation"); \
645	\	1429	\
646	req->callback = newSVsv (callback);	1430	req->callback = newSVsv (callback); \
		1431	req->pri = req_pri
		1432
		1433	#define REQ_SEND \
		1434	req_send (req); \
		1435	\
		1436	if (GIMME_V != G_VOID) \
		1437	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		1438
648	MODULE = IO::AIO PACKAGE = IO::AIO	1439	MODULE = IO::AIO PACKAGE = IO::AIO
649		1440
650	PROTOTYPES: ENABLE	1441	PROTOTYPES: ENABLE
651		1442
652	BOOT:	1443	BOOT:
653	{	1444	{
654	create_pipe ();	1445	stash = gv_stashpv ("IO::AIO", 1);
		1446
		1447	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1448	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1449	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1450	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1451	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1452	#ifdef _WIN32
		1453	X_MUTEX_CHECK (wrklock);
		1454	X_MUTEX_CHECK (reslock);
		1455	X_MUTEX_CHECK (reqlock);
		1456	X_MUTEX_CHECK (reqwait);
		1457	X_MUTEX_CHECK (preadwritelock);
		1458	X_MUTEX_CHECK (readdirlock);
		1459
		1460	X_COND_CHECK (reqwait);
		1461	#else
		1462	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1463	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1464	#endif
		1465
		1466	create_respipe ();
		1467
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1468	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
656	}	1469	}
657		1470
658	void	1471	void
659	min_parallel(nthreads)	1472	max_poll_reqs (int nreqs)
660	int nthreads
661	PROTOTYPE: $	1473	PROTOTYPE: $
		1474	CODE:
		1475	max_poll_reqs = nreqs;
662		1476
663	void	1477	void
664	max_parallel(nthreads)	1478	max_poll_time (double nseconds)
665	int nthreads
666	PROTOTYPE: $	1479	PROTOTYPE: $
		1480	CODE:
		1481	max_poll_time = nseconds * AIO_TICKS;
		1482
		1483	void
		1484	min_parallel (int nthreads)
		1485	PROTOTYPE: $
		1486
		1487	void
		1488	max_parallel (int nthreads)
		1489	PROTOTYPE: $
		1490
		1491	void
		1492	max_idle (int nthreads)
		1493	PROTOTYPE: $
		1494	CODE:
		1495	set_max_idle (nthreads);
667		1496
668	int	1497	int
669	max_outstanding(nreqs)	1498	max_outstanding (int maxreqs)
670	int nreqs	1499	PROTOTYPE: $
671	PROTOTYPE: $
672	CODE:	1500	CODE:
673	RETVAL = max_outstanding;	1501	RETVAL = max_outstanding;
674	max_outstanding = nreqs;	1502	max_outstanding = maxreqs;
		1503	OUTPUT:
		1504	RETVAL
675		1505
676	void	1506	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1507	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
678	SV * pathname
679	int flags
680	int mode
681	SV * callback
682	PROTOTYPE: $$$;$	1508	PROTOTYPE: $$$;$
683	CODE:	1509	PPCODE:
684	{	1510	{
685	dREQ;	1511	dREQ;
686		1512
687	req->type = REQ_OPEN;	1513	req->type = REQ_OPEN;
688	req->data = newSVsv (pathname);	1514	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	1515	req->ptr1 = SvPVbyte_nolen (req->sv1);
690	req->fd = flags;	1516	req->int1 = flags;
691	req->mode = mode;	1517	req->mode = mode;
692		1518
693	send_req (req);	1519	REQ_SEND;
694	}	1520	}
695		1521
696	void	1522	void
697	aio_close(fh,callback=&PL_sv_undef)	1523	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
698	SV * fh
699	SV * callback
700	PROTOTYPE: $;$	1524	PROTOTYPE: $;$
701	ALIAS:	1525	ALIAS:
702	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	1526	aio_fsync = REQ_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	1527	aio_fdatasync = REQ_FDATASYNC
705	CODE:	1528	PPCODE:
706	{	1529	{
707	dREQ;	1530	dREQ;
708		1531
709	req->type = ix;	1532	req->type = ix;
710	req->fh = newSVsv (fh);	1533	req->sv1 = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1534	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		1535
713	send_req (req);	1536	REQ_SEND (req);
714	}	1537	}
715		1538
		1539	int
		1540	_dup (int fd)
		1541	PROTOTYPE: $
		1542	CODE:
		1543	RETVAL = dup (fd);
		1544	OUTPUT:
		1545	RETVAL
		1546
716	void	1547	void
		1548	_aio_close (int fd, SV *callback=&PL_sv_undef)
		1549	PROTOTYPE: $;$
		1550	PPCODE:
		1551	{
		1552	dREQ;
		1553
		1554	req->type = REQ_CLOSE;
		1555	req->int1 = fd;
		1556
		1557	REQ_SEND (req);
		1558	}
		1559
		1560	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1561	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
718	SV * fh
719	UV offset
720	UV length
721	SV * data
722	UV dataoffset
723	SV * callback
724	ALIAS:	1562	ALIAS:
725	aio_read = REQ_READ	1563	aio_read = REQ_READ
726	aio_write = REQ_WRITE	1564	aio_write = REQ_WRITE
727	PROTOTYPE: $$$$$;$	1565	PROTOTYPE: $$$$$;$
728	CODE:	1566	PPCODE:
729	{	1567	{
730	aio_req req;
731	STRLEN svlen;	1568	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	1569	char *svptr = SvPVbyte (data, svlen);
		1570	UV len = SvUV (length);
733		1571
734	SvUPGRADE (data, SVt_PV);	1572	SvUPGRADE (data, SVt_PV);
735	SvPOK_on (data);	1573	SvPOK_on (data);
736		1574
737	if (dataoffset < 0)	1575	if (dataoffset < 0)
738	dataoffset += svlen;	1576	dataoffset += svlen;
739		1577
740	if (dataoffset < 0 || dataoffset > svlen)	1578	if (dataoffset < 0 || dataoffset > svlen)
741	croak ("data offset outside of string");	1579	croak ("dataoffset outside of data scalar");
742		1580
743	if (ix == REQ_WRITE)	1581	if (ix == REQ_WRITE)
744	{	1582	{
745	/* write: check length and adjust. */	1583	/* write: check length and adjust. */
746	if (length < 0 || length + dataoffset > svlen)	1584	if (!SvOK (length) || len + dataoffset > svlen)
747	length = svlen - dataoffset;	1585	len = svlen - dataoffset;
748	}	1586	}
749	else	1587	else
750	{	1588	{
751	/* read: grow scalar as necessary */	1589	/* read: grow scalar as necessary */
752	svptr = SvGROW (data, length + dataoffset);	1590	svptr = SvGROW (data, len + dataoffset + 1);
753	}	1591	}
754		1592
755	if (length < 0)	1593	if (len < 0)
756	croak ("length must not be negative");	1594	croak ("length must not be negative");
757		1595
758	{	1596	{
759	dREQ;	1597	dREQ;
760		1598
761	req->type = ix;	1599	req->type = ix;
762	req->fh = newSVsv (fh);	1600	req->sv1 = newSVsv (fh);
763	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1601	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
764	: IoOFP (sv_2io (fh)));	1602	: IoOFP (sv_2io (fh)));
		1603	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
765	req->offset = offset;	1604	req->size = len;
766	req->length = length;
767	req->data = SvREFCNT_inc (data);	1605	req->sv2 = SvREFCNT_inc (data);
768	req->dataptr = (char *)svptr + dataoffset;	1606	req->ptr1 = (char *)svptr + dataoffset;
		1607	req->stroffset = dataoffset;
769		1608
770	if (!SvREADONLY (data))	1609	if (!SvREADONLY (data))
771	{	1610	{
772	SvREADONLY_on (data);	1611	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	1612	req->flags |= FLAG_SV2_RO_OFF;
774	}	1613	}
775		1614
776	send_req (req);	1615	REQ_SEND;
777	}	1616	}
778	}	1617	}
779		1618
780	void	1619	void
		1620	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1621	PROTOTYPE: $$;$
		1622	PPCODE:
		1623	{
		1624	SV *data;
		1625	dREQ;
		1626
		1627	data = newSV (NAME_MAX);
		1628	SvPOK_on (data);
		1629
		1630	req->type = REQ_READLINK;
		1631	req->sv1 = newSVsv (path);
		1632	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1633	req->sv2 = data;
		1634	req->ptr1 = SvPVbyte_nolen (data);
		1635
		1636	REQ_SEND;
		1637	}
		1638
		1639	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1640	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
782	SV * out_fh
783	SV * in_fh
784	UV in_offset
785	UV length
786	SV * callback
787	PROTOTYPE: $$$$;$	1641	PROTOTYPE: $$$$;$
788	CODE:	1642	PPCODE:
789	{	1643	{
790	dREQ;	1644	dREQ;
791		1645
792	req->type = REQ_SENDFILE;	1646	req->type = REQ_SENDFILE;
793	req->fh = newSVsv (out_fh);	1647	req->sv1 = newSVsv (out_fh);
794	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1648	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
795	req->fh2 = newSVsv (in_fh);	1649	req->sv2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1650	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	1651	req->offs = SvVAL64 (in_offset);
798	req->length = length;	1652	req->size = length;
799		1653
800	send_req (req);	1654	REQ_SEND;
801	}	1655	}
802		1656
803	void	1657	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1658	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
805	SV * fh
806	UV offset
807	IV length
808	SV * callback
809	PROTOTYPE: $$$;$	1659	PROTOTYPE: $$$;$
810	CODE:	1660	PPCODE:
811	{	1661	{
812	dREQ;	1662	dREQ;
813		1663
814	req->type = REQ_READAHEAD;	1664	req->type = REQ_READAHEAD;
815	req->fh = newSVsv (fh);	1665	req->sv1 = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1666	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	1667	req->offs = SvVAL64 (offset);
818	req->length = length;	1668	req->size = length;
819		1669
820	send_req (req);	1670	REQ_SEND;
821	}	1671	}
822		1672
823	void	1673	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	1674	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
825	SV * fh_or_path
826	SV * callback
827	ALIAS:	1675	ALIAS:
828	aio_stat = REQ_STAT	1676	aio_stat = REQ_STAT
829	aio_lstat = REQ_LSTAT	1677	aio_lstat = REQ_LSTAT
830	CODE:	1678	PPCODE:
831	{	1679	{
832	dREQ;	1680	dREQ;
833		1681
834	New (0, req->statdata, 1, Stat_t);	1682	req->ptr2 = malloc (sizeof (Stat_t));
835	if (!req->statdata)	1683	if (!req->ptr2)
836	{	1684	{
837	free_req (req);	1685	req_destroy (req);
838	croak ("out of memory during aio_req->statdata allocation");	1686	croak ("out of memory during aio_stat statdata allocation");
839	}	1687	}
		1688
		1689	req->flags |= FLAG_PTR2_FREE;
		1690	req->sv1 = newSVsv (fh_or_path);
840		1691
841	if (SvPOK (fh_or_path))	1692	if (SvPOK (fh_or_path))
842	{	1693	{
843	req->type = ix;	1694	req->type = ix;
844	req->data = newSVsv (fh_or_path);
845	req->dataptr = SvPVbyte_nolen (req->data);	1695	req->ptr1 = SvPVbyte_nolen (req->sv1);
846	}	1696	}
847	else	1697	else
848	{	1698	{
849	req->type = REQ_FSTAT;	1699	req->type = REQ_FSTAT;
850	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1700	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
852	}	1701	}
853		1702
854	send_req (req);	1703	REQ_SEND;
855	}	1704	}
856		1705
857	void	1706	void
		1707	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1708	PPCODE:
		1709	{
		1710	dREQ;
		1711
		1712	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1713	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1714	req->sv1 = newSVsv (fh_or_path);
		1715
		1716	if (SvPOK (fh_or_path))
		1717	{
		1718	req->type = REQ_UTIME;
		1719	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1720	}
		1721	else
		1722	{
		1723	req->type = REQ_FUTIME;
		1724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1725	}
		1726
		1727	REQ_SEND;
		1728	}
		1729
		1730	void
		1731	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1732	PPCODE:
		1733	{
		1734	dREQ;
		1735
		1736	req->sv1 = newSVsv (fh_or_path);
		1737	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1738
		1739	if (SvPOK (fh_or_path))
		1740	{
		1741	req->type = REQ_TRUNCATE;
		1742	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1743	}
		1744	else
		1745	{
		1746	req->type = REQ_FTRUNCATE;
		1747	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1748	}
		1749
		1750	REQ_SEND;
		1751	}
		1752
		1753	void
		1754	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1755	PPCODE:
		1756	{
		1757	dREQ;
		1758
		1759	req->mode = mode;
		1760	req->sv1 = newSVsv (fh_or_path);
		1761
		1762	if (SvPOK (fh_or_path))
		1763	{
		1764	req->type = REQ_CHMOD;
		1765	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1766	}
		1767	else
		1768	{
		1769	req->type = REQ_FCHMOD;
		1770	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1771	}
		1772
		1773	REQ_SEND;
		1774	}
		1775
		1776	void
		1777	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1778	PPCODE:
		1779	{
		1780	dREQ;
		1781
		1782	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1783	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1784	req->sv1 = newSVsv (fh_or_path);
		1785
		1786	if (SvPOK (fh_or_path))
		1787	{
		1788	req->type = REQ_CHOWN;
		1789	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1790	}
		1791	else
		1792	{
		1793	req->type = REQ_FCHOWN;
		1794	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1795	}
		1796
		1797	REQ_SEND;
		1798	}
		1799
		1800	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	1801	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
859	SV * pathname
860	SV * callback
861	ALIAS:	1802	ALIAS:
862	aio_unlink = REQ_UNLINK	1803	aio_unlink = REQ_UNLINK
863	aio_rmdir = REQ_RMDIR	1804	aio_rmdir = REQ_RMDIR
		1805	aio_readdir = REQ_READDIR
864	CODE:	1806	PPCODE:
865	{	1807	{
866	dREQ;	1808	dREQ;
867		1809
868	req->type = ix;	1810	req->type = ix;
869	req->data = newSVsv (pathname);	1811	req->sv1 = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	1812	req->ptr1 = SvPVbyte_nolen (req->sv1);
871
872	send_req (req);
873	}
874		1813
		1814	REQ_SEND;
		1815	}
		1816
875	void	1817	void
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1818	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
877	SV * oldpath
878	SV * newpath
879	SV * callback
880	CODE:	1819	PPCODE:
881	{	1820	{
882	dREQ;	1821	dREQ;
883		1822
884	req->type = REQ_SYMLINK;	1823	req->type = REQ_MKDIR;
885	req->fh = newSVsv (oldpath);	1824	req->sv1 = newSVsv (pathname);
886	req->data2ptr = SvPVbyte_nolen (req->fh);	1825	req->ptr1 = SvPVbyte_nolen (req->sv1);
887	req->data = newSVsv (newpath);	1826	req->mode = mode;
888	req->dataptr = SvPVbyte_nolen (req->data);	1827
		1828	REQ_SEND;
		1829	}
		1830
		1831	void
		1832	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1833	ALIAS:
		1834	aio_link = REQ_LINK
		1835	aio_symlink = REQ_SYMLINK
		1836	aio_rename = REQ_RENAME
		1837	PPCODE:
		1838	{
		1839	dREQ;
889		1840
890	send_req (req);	1841	req->type = ix;
		1842	req->sv2 = newSVsv (oldpath);
		1843	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1844	req->sv1 = newSVsv (newpath);
		1845	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1846
		1847	REQ_SEND;
891	}	1848	}
892		1849
893	void	1850	void
		1851	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1852	PPCODE:
		1853	{
		1854	dREQ;
		1855
		1856	req->type = REQ_MKNOD;
		1857	req->sv1 = newSVsv (pathname);
		1858	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1859	req->mode = (mode_t)mode;
		1860	req->offs = dev;
		1861
		1862	REQ_SEND;
		1863	}
		1864
		1865	void
		1866	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1867	PPCODE:
		1868	{
		1869	dREQ;
		1870
		1871	req->type = REQ_BUSY;
		1872	req->nv1 = delay < 0. ? 0. : delay;
		1873
		1874	REQ_SEND;
		1875	}
		1876
		1877	void
		1878	aio_group (SV *callback=&PL_sv_undef)
		1879	PROTOTYPE: ;$
		1880	PPCODE:
		1881	{
		1882	dREQ;
		1883
		1884	req->type = REQ_GROUP;
		1885
		1886	req_send (req);
		1887	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1888	}
		1889
		1890	void
		1891	aio_nop (SV *callback=&PL_sv_undef)
		1892	PPCODE:
		1893	{
		1894	dREQ;
		1895
		1896	req->type = REQ_NOP;
		1897
		1898	REQ_SEND;
		1899	}
		1900
		1901	int
		1902	aioreq_pri (int pri = 0)
		1903	PROTOTYPE: ;$
		1904	CODE:
		1905	RETVAL = next_pri - PRI_BIAS;
		1906	if (items > 0)
		1907	{
		1908	if (pri < PRI_MIN) pri = PRI_MIN;
		1909	if (pri > PRI_MAX) pri = PRI_MAX;
		1910	next_pri = pri + PRI_BIAS;
		1911	}
		1912	OUTPUT:
		1913	RETVAL
		1914
		1915	void
		1916	aioreq_nice (int nice = 0)
		1917	CODE:
		1918	nice = next_pri - nice;
		1919	if (nice < PRI_MIN) nice = PRI_MIN;
		1920	if (nice > PRI_MAX) nice = PRI_MAX;
		1921	next_pri = nice + PRI_BIAS;
		1922
		1923	void
894	flush()	1924	flush ()
895	PROTOTYPE:	1925	PROTOTYPE:
896	CODE:	1926	CODE:
897	while (nreqs)	1927	while (nreqs)
898	{	1928	{
899	poll_wait ();	1929	poll_wait ();
900	poll_cb ();	1930	poll_cb ();
901	}	1931	}
902		1932
903	void	1933	int
904	poll()	1934	poll()
905	PROTOTYPE:	1935	PROTOTYPE:
906	CODE:	1936	CODE:
907	if (nreqs)
908	{
909	poll_wait ();	1937	poll_wait ();
910	poll_cb ();	1938	RETVAL = poll_cb ();
911	}	1939	OUTPUT:
		1940	RETVAL
912		1941
913	int	1942	int
914	poll_fileno()	1943	poll_fileno()
915	PROTOTYPE:	1944	PROTOTYPE:
916	CODE:	1945	CODE:
…		…
928		1957
929	void	1958	void
930	poll_wait()	1959	poll_wait()
931	PROTOTYPE:	1960	PROTOTYPE:
932	CODE:	1961	CODE:
933	if (nreqs)
934	poll_wait ();	1962	poll_wait ();
		1963
		1964	void
		1965	setsig (int signum = SIGIO)
		1966	PROTOTYPE: ;$
		1967	CODE:
		1968	{
		1969	if (block_sig_level)
		1970	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1971
		1972	X_LOCK (reslock);
		1973	main_tid = pthread_self ();
		1974	main_sig = signum;
		1975	X_UNLOCK (reslock);
		1976
		1977	if (main_sig && npending)
		1978	pthread_kill (main_tid, main_sig);
		1979	}
		1980
		1981	void
		1982	aio_block (SV *cb)
		1983	PROTOTYPE: &
		1984	PPCODE:
		1985	{
		1986	int count;
		1987
		1988	block_sig ();
		1989	PUSHMARK (SP);
		1990	PUTBACK;
		1991	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1992	SPAGAIN;
		1993	unblock_sig ();
		1994
		1995	if (SvTRUE (ERRSV))
		1996	croak (0);
		1997
		1998	XSRETURN (count);
		1999	}
935		2000
936	int	2001	int
937	nreqs()	2002	nreqs()
938	PROTOTYPE:	2003	PROTOTYPE:
939	CODE:	2004	CODE:
940	RETVAL = nreqs;	2005	RETVAL = nreqs;
941	OUTPUT:	2006	OUTPUT:
942	RETVAL	2007	RETVAL
943		2008
		2009	int
		2010	nready()
		2011	PROTOTYPE:
		2012	CODE:
		2013	RETVAL = get_nready ();
		2014	OUTPUT:
		2015	RETVAL
		2016
		2017	int
		2018	npending()
		2019	PROTOTYPE:
		2020	CODE:
		2021	RETVAL = get_npending ();
		2022	OUTPUT:
		2023	RETVAL
		2024
		2025	int
		2026	nthreads()
		2027	PROTOTYPE:
		2028	CODE:
		2029	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		2030	RETVAL = started;
		2031	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		2032	OUTPUT:
		2033	RETVAL
		2034
		2035	PROTOTYPES: DISABLE
		2036
		2037	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2038
		2039	void
		2040	cancel (aio_req_ornot req)
		2041	CODE:
		2042	req_cancel (req);
		2043
		2044	void
		2045	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		2046	CODE:
		2047	SvREFCNT_dec (req->callback);
		2048	req->callback = newSVsv (callback);
		2049
		2050	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2051
		2052	void
		2053	add (aio_req grp, ...)
		2054	PPCODE:
		2055	{
		2056	int i;
		2057	aio_req req;
		2058
		2059	if (main_sig && !block_sig_level)
		2060	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		2061
		2062	if (grp->int1 == 2)
		2063	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2064
		2065	for (i = 1; i < items; ++i )
		2066	{
		2067	if (GIMME_V != G_VOID)
		2068	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2069
		2070	req = SvAIO_REQ (ST (i));
		2071
		2072	if (req)
		2073	{
		2074	++grp->size;
		2075	req->grp = grp;
		2076
		2077	req->grp_prev = 0;
		2078	req->grp_next = grp->grp_first;
		2079
		2080	if (grp->grp_first)
		2081	grp->grp_first->grp_prev = req;
		2082
		2083	grp->grp_first = req;
		2084	}
		2085	}
		2086	}
		2087
		2088	void
		2089	cancel_subs (aio_req_ornot req)
		2090	CODE:
		2091	req_cancel_subs (req);
		2092
		2093	void
		2094	result (aio_req grp, ...)
		2095	CODE:
		2096	{
		2097	int i;
		2098	AV *av;
		2099
		2100	grp->errorno = errno;
		2101
		2102	av = newAV ();
		2103
		2104	for (i = 1; i < items; ++i )
		2105	av_push (av, newSVsv (ST (i)));
		2106
		2107	SvREFCNT_dec (grp->sv1);
		2108	grp->sv1 = (SV *)av;
		2109	}
		2110
		2111	void
		2112	errno (aio_req grp, int errorno = errno)
		2113	CODE:
		2114	grp->errorno = errorno;
		2115
		2116	void
		2117	limit (aio_req grp, int limit)
		2118	CODE:
		2119	grp->int2 = limit;
		2120	aio_grp_feed (grp);
		2121
		2122	void
		2123	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2124	CODE:
		2125	{
		2126	SvREFCNT_dec (grp->sv2);
		2127	grp->sv2 = newSVsv (callback);
		2128
		2129	if (grp->int2 <= 0)
		2130	grp->int2 = 2;
		2131
		2132	aio_grp_feed (grp);
		2133	}
		2134

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