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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.17 by root, Sun Jul 31 18:45:48 2005 UTC vs.
Revision 1.107 by root, Wed Oct 3 21:27:51 2007 UTC

		1	#include "xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "autoconf/config.h"	9	#include <stddef.h>
6		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9
10	#include <unistd.h>	14	#include <limits.h>
11	#include <fcntl.h>	15	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	16	#include <sched.h>
14		17
15	#include <pthread.h>	18	#ifdef _WIN32
16		19
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	20	# define SIGIO 0
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	typedef Direntry_t X_DIRENT;
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	22	#undef malloc
		23	#undef free
20		24
21	#if __ia64	25	// perl overrides all those nice win32 functions
22	# define STACKSIZE 65536	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
23	#else	57	#else
24	# define STACKSIZE 4096	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
25	#endif	67	#endif
		68
		69	#if HAVE_SENDFILE
		70	# if __linux
		71	# include <sys/sendfile.h>
		72	# elif __freebsd
		73	# include <sys/socket.h>
		74	# include <sys/uio.h>
		75	# elif __hpux
		76	# include <sys/socket.h>
		77	# elif __solaris /* not yet */
		78	# include <sys/sendfile.h>
		79	# else
		80	# error sendfile support requested but not available
		81	# endif
		82	#endif
		83
		84	/* number of seconds after which idle threads exit */
		85	#define IDLE_TIMEOUT 10
		86
		87	/* used for struct dirent, AIX doesn't provide it */
		88	#ifndef NAME_MAX
		89	# define NAME_MAX 4096
		90	#endif
		91
		92	/* buffer size for various temporary buffers */
		93	#define AIO_BUFSIZE 65536
		94
		95	/* use NV for 32 bit perls as it allows larger offsets */
		96	#if IVSIZE >= 8
		97	# define SvVAL64 SvIV
		98	#else
		99	# define SvVAL64 SvNV
		100	#endif
		101
		102	static HV *stash;
		103
		104	#define dBUF \
		105	char *aio_buf; \
		106	X_LOCK (wrklock); \
		107	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		108	X_UNLOCK (wrklock); \
		109	if (!aio_buf) \
		110	return -1;
		111
		112	typedef SV SV8; /* byte-sv, used for argument-checking */
26		113
27	enum {	114	enum {
28	REQ_QUIT,	115	REQ_QUIT,
29	REQ_OPEN, REQ_CLOSE,	116	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,	117	REQ_READ, REQ_WRITE,
		118	REQ_READAHEAD, REQ_SENDFILE,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	119	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		120	REQ_TRUNCATE, REQ_FTRUNCATE,
		121	REQ_UTIME, REQ_FUTIME,
		122	REQ_CHMOD, REQ_FCHMOD,
		123	REQ_CHOWN, REQ_FCHOWN,
32	REQ_FSYNC, REQ_FDATASYNC,	124	REQ_FSYNC, REQ_FDATASYNC,
		125	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
		126	REQ_MKNOD, REQ_READDIR,
		127	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		128	REQ_GROUP, REQ_NOP,
		129	REQ_BUSY,
33	};	130	};
34		131
		132	#define AIO_REQ_KLASS "IO::AIO::REQ"
		133	#define AIO_GRP_KLASS "IO::AIO::GRP"
		134
35	typedef struct aio_cb {	135	typedef struct aio_cb
		136	{
36	struct aio_cb *volatile next;	137	struct aio_cb *volatile next;
37		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;
38	int type;	148	int type;
39		149	int int1, int2, int3;
40	int fd;	150	int errorno;
41	off_t offset;
42	size_t length;
43	ssize_t result;
44	mode_t mode; /* open */	151	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49		152
50	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;
51	} aio_cb;	158	} aio_cb;
52		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
53	typedef aio_cb *aio_req;	166	typedef aio_cb *aio_req;
		167	typedef aio_cb *aio_req_ornot;
54		168
55	static int started;	169	enum {
56	static volatile int nreqs;	170	PRI_MIN = -4,
57	static int max_outstanding = 1<<30;	171	PRI_MAX = 4,
58	static int respipe [2];
59		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
		226	static unsigned int started, idle, wanted;
		227
		228	/* worker threads management */
		229	static mutex_t wrklock = X_MUTEX_INIT;
		230
		231	typedef struct worker {
		232	/* locked by wrklock */
		233	struct worker *prev, *next;
		234
		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
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	273	static mutex_t reslock = X_MUTEX_INIT;
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	274	static mutex_t reqlock = X_MUTEX_INIT;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	275	static cond_t reqwait = X_COND_INIT;
63		276
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	277	#if WORDACCESS_UNSAFE
65	static volatile aio_req ress, rese; /* queue start, queue end */	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);
		377	static void req_cancel (aio_req req);
		378
		379	/* must be called at most once */
		380	static SV *req_sv (aio_req req, const char *klass)
		381	{
		382	if (!req->self)
		383	{
		384	req->self = (SV *)newHV ();
		385	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		386	}
		387
		388	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		389	}
		390
		391	static aio_req SvAIO_REQ (SV *sv)
		392	{
		393	MAGIC *mg;
		394
		395	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		396	croak ("object of class " AIO_REQ_KLASS " expected");
		397
		398	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		399
		400	return mg ? (aio_req)mg->mg_ptr : 0;
		401	}
		402
		403	static void aio_grp_feed (aio_req grp)
		404	{
		405	block_sig ();
		406
		407	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		408	{
		409	int old_len = grp->size;
		410
		411	if (grp->sv2 && SvOK (grp->sv2))
		412	{
		413	dSP;
		414
		415	ENTER;
		416	SAVETMPS;
		417	PUSHMARK (SP);
		418	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		419	PUTBACK;
		420	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		421	SPAGAIN;
		422	FREETMPS;
		423	LEAVE;
		424	}
		425
		426	/* stop if no progress has been made */
		427	if (old_len == grp->size)
		428	{
		429	SvREFCNT_dec (grp->sv2);
		430	grp->sv2 = 0;
		431	break;
		432	}
		433	}
		434
		435	unblock_sig ();
		436	}
		437
		438	static void aio_grp_dec (aio_req grp)
		439	{
		440	--grp->size;
		441
		442	/* call feeder, if applicable */
		443	aio_grp_feed (grp);
		444
		445	/* finish, if done */
		446	if (!grp->size && grp->int1)
		447	{
		448	block_sig ();
		449
		450	if (!req_invoke (grp))
		451	{
		452	req_destroy (grp);
		453	unblock_sig ();
		454	croak (0);
		455	}
		456
		457	req_destroy (grp);
		458	unblock_sig ();
		459	}
		460	}
		461
		462	static int req_invoke (aio_req req)
		463	{
		464	dSP;
		465
		466	if (req->flags & FLAG_SV2_RO_OFF)
		467	SvREADONLY_off (req->sv2);
		468
		469	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		470	{
		471	ENTER;
		472	SAVETMPS;
		473	PUSHMARK (SP);
		474	EXTEND (SP, 1);
		475
		476	switch (req->type)
		477	{
		478	case REQ_READDIR:
		479	{
		480	SV *rv = &PL_sv_undef;
		481
		482	if (req->result >= 0)
		483	{
		484	int i;
		485	char *buf = req->ptr2;
		486	AV *av = newAV ();
		487
		488	av_extend (av, req->result - 1);
		489
		490	for (i = 0; i < req->result; ++i)
		491	{
		492	SV *sv = newSVpv (buf, 0);
		493
		494	av_store (av, i, sv);
		495	buf += SvCUR (sv) + 1;
		496	}
		497
		498	rv = sv_2mortal (newRV_noinc ((SV *)av));
		499	}
		500
		501	PUSHs (rv);
		502	}
		503	break;
		504
		505	case REQ_OPEN:
		506	{
		507	/* convert fd to fh */
		508	SV *fh = &PL_sv_undef;
		509
		510	if (req->result >= 0)
		511	{
		512	GV *gv = (GV *)sv_newmortal ();
		513	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		514	char sym [64];
		515	int symlen;
		516
		517	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		518	gv_init (gv, stash, sym, symlen, 0);
		519
		520	symlen = snprintf (
		521	sym,
		522	sizeof (sym),
		523	"%s&=%d",
		524	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		525	req->result
		526	);
		527
		528	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		529	fh = gv;
		530	}
		531
		532	XPUSHs (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);
		587	SPAGAIN;
		588
		589	FREETMPS;
		590	LEAVE;
		591	}
		592
		593	if (req->grp)
		594	{
		595	aio_req grp = req->grp;
		596
		597	/* unlink request */
		598	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		599	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		600
		601	if (grp->grp_first == req)
		602	grp->grp_first = req->grp_next;
		603
		604	aio_grp_dec (grp);
		605	}
		606
		607	return !SvTRUE (ERRSV);
		608	}
		609
		610	static void req_destroy (aio_req req)
		611	{
		612	if (req->self)
		613	{
		614	sv_unmagic (req->self, PERL_MAGIC_ext);
		615	SvREFCNT_dec (req->self);
		616	}
		617
		618	SvREFCNT_dec (req->sv1);
		619	SvREFCNT_dec (req->sv2);
		620	SvREFCNT_dec (req->callback);
		621
		622	if (req->flags & FLAG_PTR2_FREE)
		623	free (req->ptr2);
		624
		625	Safefree (req);
		626	}
		627
		628	static void req_cancel_subs (aio_req grp)
		629	{
		630	aio_req sub;
		631
		632	if (grp->type != REQ_GROUP)
		633	return;
		634
		635	SvREFCNT_dec (grp->sv2);
		636	grp->sv2 = 0;
		637
		638	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		639	req_cancel (sub);
		640	}
		641
		642	static void req_cancel (aio_req req)
		643	{
		644	req->flags |= FLAG_CANCELLED;
		645
		646	req_cancel_subs (req);
		647	}
		648
		649	#ifdef USE_SOCKETS_AS_HANDLES
		650	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		651	#else
		652	# define TO_SOCKET(x) (x)
		653	#endif
66		654
67	static void	655	static void
68	poll_wait ()	656	create_respipe ()
69	{	657	{
70	if (nreqs && !ress)	658	int old_readfd = respipe [0];
		659
		660	if (respipe [1] >= 0)
		661	respipe_close (TO_SOCKET (respipe [1]));
		662
		663	#ifdef _WIN32
		664	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		665	#else
		666	if (pipe (respipe))
		667	#endif
		668	croak ("unable to initialize result pipe");
		669
		670	if (old_readfd >= 0)
71	{	671	{
72	fd_set rfd;	672	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
73	FD_ZERO(&rfd);	673	croak ("unable to initialize result pipe(2)");
74	FD_SET(respipe [0], &rfd);
75		674
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	675	respipe_close (respipe [0]);
		676	respipe [0] = old_readfd;
77	}	677	}
78	}
79		678
80	static int	679	#ifdef _WIN32
81	poll_cb ()	680	int arg = 1;
		681	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		682	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		683	#else
		684	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		685	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		686	#endif
		687	croak ("unable to initialize result pipe(3)");
		688
		689	respipe_osf [0] = TO_SOCKET (respipe [0]);
		690	respipe_osf [1] = TO_SOCKET (respipe [1]);
		691	}
		692
		693	X_THREAD_PROC (aio_proc);
		694
		695	static void start_thread (void)
		696	{
		697	worker *wrk = calloc (1, sizeof (worker));
		698
		699	if (!wrk)
		700	croak ("unable to allocate worker thread data");
		701
		702	X_LOCK (wrklock);
		703
		704	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
		705	{
		706	wrk->prev = &wrk_first;
		707	wrk->next = wrk_first.next;
		708	wrk_first.next->prev = wrk;
		709	wrk_first.next = wrk;
		710	++started;
		711	}
		712	else
		713	free (wrk);
		714
		715	X_UNLOCK (wrklock);
		716	}
		717
		718	static void maybe_start_thread ()
		719	{
		720	if (get_nthreads () >= wanted)
		721	return;
		722
		723	/* todo: maybe use idle here, but might be less exact */
		724	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		725	return;
		726
		727	start_thread ();
		728	}
		729
		730	static void req_send (aio_req req)
		731	{
		732	block_sig ();
		733
		734	++nreqs;
		735
		736	X_LOCK (reqlock);
		737	++nready;
		738	reqq_push (&req_queue, req);
		739	X_COND_SIGNAL (reqwait);
		740	X_UNLOCK (reqlock);
		741
		742	unblock_sig ();
		743
		744	maybe_start_thread ();
		745	}
		746
		747	static void end_thread (void)
		748	{
		749	aio_req req;
		750
		751	Newz (0, req, 1, aio_cb);
		752
		753	req->type = REQ_QUIT;
		754	req->pri = PRI_MAX + PRI_BIAS;
		755
		756	X_LOCK (reqlock);
		757	reqq_push (&req_queue, req);
		758	X_COND_SIGNAL (reqwait);
		759	X_UNLOCK (reqlock);
		760
		761	X_LOCK (wrklock);
		762	--started;
		763	X_UNLOCK (wrklock);
		764	}
		765
		766	static void set_max_idle (int nthreads)
		767	{
		768	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		769	max_idle = nthreads <= 0 ? 1 : nthreads;
		770	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		771	}
		772
		773	static void min_parallel (int nthreads)
		774	{
		775	if (wanted < nthreads)
		776	wanted = nthreads;
		777	}
		778
		779	static void max_parallel (int nthreads)
		780	{
		781	if (wanted > nthreads)
		782	wanted = nthreads;
		783
		784	while (started > wanted)
		785	end_thread ();
		786	}
		787
		788	static void poll_wait ()
		789	{
		790	fd_set rfd;
		791
		792	while (nreqs)
		793	{
		794	int size;
		795	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		796	size = res_queue.size;
		797	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		798
		799	if (size)
		800	return;
		801
		802	maybe_start_thread ();
		803
		804	FD_ZERO (&rfd);
		805	FD_SET (respipe [0], &rfd);
		806
		807	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		808	}
		809	}
		810
		811	static int poll_cb ()
82	{	812	{
83	dSP;	813	dSP;
84	int count = 0;	814	int count = 0;
		815	int maxreqs = max_poll_reqs;
		816	int do_croak = 0;
		817	struct timeval tv_start, tv_now;
85	aio_req req, prv;	818	aio_req req;
86		819
87	pthread_mutex_lock (&reslock);	820	if (max_poll_time)
		821	gettimeofday (&tv_start, 0);
88		822
89	{	823	block_sig ();
90	/* read any signals sent by the worker threads */
91	char buf [32];
92	while (read (respipe [0], buf, 32) > 0)
93	;
94	}
95		824
96	req = ress;	825	for (;;)
97	ress = rese = 0;
98
99	pthread_mutex_unlock (&reslock);
100
101	while (req)
102	{	826	{
103	nreqs--;	827	for (;;)
104
105	if (req->type == REQ_QUIT)
106	started--;
107	else
108	{	828	{
109	int errorno = errno;	829	maybe_start_thread ();
110	errno = req->errorno;
111		830
112	if (req->type == REQ_READ)	831	X_LOCK (reslock);
113	SvCUR_set (req->data, req->dataoffset	832	req = reqq_shift (&res_queue);
114	+ req->result > 0 ? req->result : 0);
115		833
116	if (req->data)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)	834	if (req)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{	835	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	836	--npending;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127		837
128	Safefree (req->statdata);	838	if (!res_queue.size)
		839	{
		840	/* read any signals sent by the worker threads */
		841	char buf [4];
		842	while (respipe_read (respipe [0], buf, 4) == 4)
		843	;
		844	}
129	}	845	}
130		846
131	ENTER;	847	X_UNLOCK (reslock);
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134		848
		849	if (!req)
		850	break;
		851
		852	--nreqs;
		853
135	if (req->type == REQ_OPEN)	854	if (req->type == REQ_GROUP && req->size)
136	{	855	{
137	/* convert fd to fh */	856	req->int1 = 1; /* mark request as delayed */
138	SV *fh;	857	continue;
139
140	PUTBACK;
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142	SPAGAIN;
143
144	fh = SvREFCNT_inc (POPs);
145
146	PUSHMARK (SP);
147	XPUSHs (sv_2mortal (fh));
148	}	858	}
149		859	else
150	if (SvOK (req->callback))
151	{	860	{
152	PUTBACK;	861	if (!req_invoke (req))
153	call_sv (req->callback, G_VOID | G_EVAL);	862	{
154	SPAGAIN;	863	req_destroy (req);
		864	unblock_sig ();
		865	croak (0);
		866	}
		867
		868	count++;
155	}	869	}
156		870
157	LEAVE;	871	req_destroy (req);
		872
		873	if (maxreqs && !--maxreqs)
		874	break;
		875
		876	if (max_poll_time)
158		877	{
159	if (req->callback)	878	gettimeofday (&tv_now, 0);
160	SvREFCNT_dec (req->callback);
161		879
162	errno = errorno;	880	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
163	count++;	881	break;
		882	}
164	}	883	}
165		884
166	prv = req;	885	if (nreqs <= max_outstanding)
167	req = req->next;	886	break;
168	Safefree (prv);
169		887
170	/* TODO: croak on errors? */	888	poll_wait ();
		889
		890	++maxreqs;
171	}	891	}
172		892
		893	unblock_sig ();
173	return count;	894	return count;
174	}	895	}
175		896
176	static void *aio_proc(void *arg);	897	/*****************************************************************************/
177
178	static void
179	start_thread (void)
180	{
181	sigset_t fullsigset, oldsigset;
182	pthread_t tid;
183	pthread_attr_t attr;
184
185	pthread_attr_init (&attr);
186	pthread_attr_setstacksize (&attr, STACKSIZE);
187	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188
189	sigfillset (&fullsigset);
190	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191
192	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
193	started++;
194
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);
196	}
197
198	static void
199	send_req (aio_req req)
200	{
201	nreqs++;
202
203	pthread_mutex_lock (&reqlock);
204
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);
217
218	while (nreqs > max_outstanding)
219	{
220	poll_wait ();
221	poll_cb ();
222	}
223	}
224
225	static void
226	end_thread (void)
227	{
228	aio_req req;
229	New (0, req, 1, aio_cb);
230	req->type = REQ_QUIT;
231
232	send_req (req);
233	}
234
235	/* work around various missing functions */	898	/* work around various missing functions */
236		899
237	#if !HAVE_PREADWRITE	900	#if !HAVE_PREADWRITE
238	# define pread aio_pread	901	# define pread aio_pread
239	# define pwrite aio_pwrite	902	# define pwrite aio_pwrite
…		…
241	/*	904	/*
242	* make our pread/pwrite safe against themselves, but not against	905	* make our pread/pwrite safe against themselves, but not against
243	* normal read/write by using a mutex. slows down execution a lot,	906	* normal read/write by using a mutex. slows down execution a lot,
244	* but that's your problem, not mine.	907	* but that's your problem, not mine.
245	*/	908	*/
246	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	909	static mutex_t preadwritelock = X_MUTEX_INIT;
247		910
248	static ssize_t	911	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
249	pread (int fd, void *buf, size_t count, off_t offset)
250	{	912	{
251	ssize_t res;	913	ssize_t res;
252	off_t ooffset;	914	off_t ooffset;
253		915
254	pthread_mutex_lock (&iolock);	916	X_LOCK (preadwritelock);
255	ooffset = lseek (fd, 0, SEEK_CUR);	917	ooffset = lseek (fd, 0, SEEK_CUR);
256	lseek (fd, offset, SEEK_SET);	918	lseek (fd, offset, SEEK_SET);
257	res = read (fd, buf, count);	919	res = read (fd, buf, count);
258	lseek (fd, ooffset, SEEK_SET);	920	lseek (fd, ooffset, SEEK_SET);
259	pthread_mutex_unlock (&iolock);	921	X_UNLOCK (preadwritelock);
260		922
261	return res;	923	return res;
262	}	924	}
263		925
264	static ssize_t
265	pwrite (int fd, void *buf, size_t count, off_t offset)	926	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
266	{	927	{
267	ssize_t res;	928	ssize_t res;
268	off_t ooffset;	929	off_t ooffset;
269		930
270	pthread_mutex_lock (&iolock);	931	X_LOCK (preadwritelock);
271	ooffset = lseek (fd, 0, SEEK_CUR);	932	ooffset = lseek (fd, 0, SEEK_CUR);
272	lseek (fd, offset, SEEK_SET);	933	lseek (fd, offset, SEEK_SET);
273	res = write (fd, buf, count);	934	res = write (fd, buf, count);
274	lseek (fd, offset, SEEK_SET);	935	lseek (fd, offset, SEEK_SET);
275	pthread_mutex_unlock (&iolock);	936	X_UNLOCK (preadwritelock);
276		937
277	return res;	938	return res;
278	}	939	}
		940	#endif
		941
		942	#ifndef HAVE_FUTIMES
		943
		944	# define utimes(path,times) aio_utimes (path, times)
		945	# define futimes(fd,times) aio_futimes (fd, times)
		946
		947	int aio_utimes (const char *filename, const struct timeval times[2])
		948	{
		949	if (times)
		950	{
		951	struct utimbuf buf;
		952
		953	buf.actime = times[0].tv_sec;
		954	buf.modtime = times[1].tv_sec;
		955
		956	return utime (filename, &buf);
		957	}
		958	else
		959	return utime (filename, 0);
		960	}
		961
		962	int aio_futimes (int fd, const struct timeval tv[2])
		963	{
		964	errno = ENOSYS;
		965	return -1;
		966	}
		967
279	#endif	968	#endif
280		969
281	#if !HAVE_FDATASYNC	970	#if !HAVE_FDATASYNC
282	# define fdatasync fsync	971	# define fdatasync fsync
283	#endif	972	#endif
284		973
285	#if !HAVE_READAHEAD	974	#if !HAVE_READAHEAD
286	# define readahead aio_readahead	975	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
287		976
288	static char readahead_buf[4096];	977	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
289
290	static ssize_t
291	readahead (int fd, off_t offset, size_t count)
292	{	978	{
		979	size_t todo = count;
		980	dBUF;
		981
293	while (count > 0)	982	while (todo > 0)
294	{	983	{
295	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	984	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
296		985
297	pread (fd, readahead_buf, len, offset);	986	pread (fd, aio_buf, len, offset);
298	offset += len;	987	offset += len;
299	count -= len;	988	todo -= len;
300	}	989	}
301		990
302	errno = 0;	991	errno = 0;
		992	return count;
303	}	993	}
		994
304	#endif	995	#endif
305		996
306	static void *	997	#if !HAVE_READDIR_R
307	aio_proc (void *thr_arg)	998	# define readdir_r aio_readdir_r
		999
		1000	static mutex_t readdirlock = X_MUTEX_INIT;
		1001
		1002	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
308	{	1003	{
		1004	X_DIRENT *e;
		1005	int errorno;
		1006
		1007	X_LOCK (readdirlock);
		1008
		1009	e = readdir (dirp);
		1010	errorno = errno;
		1011
		1012	if (e)
		1013	{
		1014	*res = ent;
		1015	strcpy (ent->d_name, e->d_name);
		1016	}
		1017	else
		1018	*res = 0;
		1019
		1020	X_UNLOCK (readdirlock);
		1021
		1022	errno = errorno;
		1023	return e ? 0 : -1;
		1024	}
		1025	#endif
		1026
		1027	/* sendfile always needs emulation */
		1028	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		1029	{
		1030	ssize_t res;
		1031
		1032	if (!count)
		1033	return 0;
		1034
		1035	#if HAVE_SENDFILE
		1036	# if __linux
		1037	res = sendfile (ofd, ifd, &offset, count);
		1038
		1039	# elif __freebsd
		1040	/*
		1041	* Of course, the freebsd sendfile is a dire hack with no thoughts
		1042	* wasted on making it similar to other I/O functions.
		1043	*/
		1044	{
		1045	off_t sbytes;
		1046	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		1047
		1048	if (res < 0 && sbytes)
		1049	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		1050	res = sbytes;
		1051	}
		1052
		1053	# elif __hpux
		1054	res = sendfile (ofd, ifd, offset, count, 0, 0);
		1055
		1056	# elif __solaris
		1057	{
		1058	struct sendfilevec vec;
		1059	size_t sbytes;
		1060
		1061	vec.sfv_fd = ifd;
		1062	vec.sfv_flag = 0;
		1063	vec.sfv_off = offset;
		1064	vec.sfv_len = count;
		1065
		1066	res = sendfilev (ofd, &vec, 1, &sbytes);
		1067
		1068	if (res < 0 && sbytes)
		1069	res = sbytes;
		1070	}
		1071
		1072	# endif
		1073	#else
		1074	res = -1;
		1075	errno = ENOSYS;
		1076	#endif
		1077
		1078	if (res < 0
		1079	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1080	#if __solaris
		1081	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		1082	#endif
		1083	)
		1084	)
		1085	{
		1086	/* emulate sendfile. this is a major pain in the ass */
		1087	dBUF;
		1088
		1089	res = 0;
		1090
		1091	while (count)
		1092	{
		1093	ssize_t cnt;
		1094
		1095	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		1096
		1097	if (cnt <= 0)
		1098	{
		1099	if (cnt && !res) res = -1;
		1100	break;
		1101	}
		1102
		1103	cnt = write (ofd, aio_buf, cnt);
		1104
		1105	if (cnt <= 0)
		1106	{
		1107	if (cnt && !res) res = -1;
		1108	break;
		1109	}
		1110
		1111	offset += cnt;
		1112	res += cnt;
		1113	count -= cnt;
		1114	}
		1115	}
		1116
		1117	return res;
		1118	}
		1119
		1120	/* read a full directory */
		1121	static void scandir_ (aio_req req, worker *self)
		1122	{
		1123	DIR *dirp;
		1124	union
		1125	{
		1126	X_DIRENT d;
		1127	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
		1128	} *u;
		1129	X_DIRENT *entp;
		1130	char *name, *names;
		1131	int memlen = 4096;
		1132	int memofs = 0;
		1133	int res = 0;
		1134
		1135	X_LOCK (wrklock);
		1136	self->dirp = dirp = opendir (req->ptr1);
		1137	self->dbuf = u = malloc (sizeof (*u));
		1138	req->flags |= FLAG_PTR2_FREE;
		1139	req->ptr2 = names = malloc (memlen);
		1140	X_UNLOCK (wrklock);
		1141
		1142	if (dirp && u && names)
		1143	for (;;)
		1144	{
		1145	errno = 0;
		1146	readdir_r (dirp, &u->d, &entp);
		1147
		1148	if (!entp)
		1149	break;
		1150
		1151	name = entp->d_name;
		1152
		1153	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1154	{
		1155	int len = strlen (name) + 1;
		1156
		1157	res++;
		1158
		1159	while (memofs + len > memlen)
		1160	{
		1161	memlen *= 2;
		1162	X_LOCK (wrklock);
		1163	req->ptr2 = names = realloc (names, memlen);
		1164	X_UNLOCK (wrklock);
		1165
		1166	if (!names)
		1167	break;
		1168	}
		1169
		1170	memcpy (names + memofs, name, len);
		1171	memofs += len;
		1172	}
		1173	}
		1174
		1175	if (errno)
		1176	res = -1;
		1177
		1178	req->result = res;
		1179	}
		1180
		1181	/*****************************************************************************/
		1182
		1183	X_THREAD_PROC (aio_proc)
		1184	{
		1185	{//D
309	aio_req req;	1186	aio_req req;
310	int type;	1187	struct timespec ts;
		1188	worker *self = (worker *)thr_arg;
311		1189
312	do	1190	/* try to distribute timeouts somewhat randomly */
		1191	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
		1192
		1193	for (;;)
313	{	1194	{
314	pthread_mutex_lock (&reqlock);	1195	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1196
		1197	X_LOCK (reqlock);
315		1198
316	for (;;)	1199	for (;;)
317	{	1200	{
318	req = reqs;	1201	self->req = req = reqq_shift (&req_queue);
319
320	if (reqs)
321	{
322	reqs = reqs->next;
323	if (!reqs) reqe = 0;
324	}
325		1202
326	if (req)	1203	if (req)
327	break;	1204	break;
328		1205
329	pthread_cond_wait (&reqwait, &reqlock);	1206	++idle;
		1207
		1208	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
		1209	== ETIMEDOUT)
		1210	{
		1211	if (idle > max_idle)
		1212	{
		1213	--idle;
		1214	X_UNLOCK (reqlock);
		1215	X_LOCK (wrklock);
		1216	--started;
		1217	X_UNLOCK (wrklock);
		1218	goto quit;
		1219	}
		1220
		1221	/* we are allowed to idle, so do so without any timeout */
		1222	X_COND_WAIT (reqwait, reqlock);
		1223	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1224	}
		1225
		1226	--idle;
330	}	1227	}
331		1228
332	pthread_mutex_unlock (&reqlock);	1229	--nready;
		1230
		1231	X_UNLOCK (reqlock);
333		1232
334	errno = 0; /* strictly unnecessary */	1233	errno = 0; /* strictly unnecessary */
335		1234
336	type = req->type;	1235	if (!(req->flags & FLAG_CANCELLED))
337
338	switch (type)	1236	switch (req->type)
		1237	{
		1238	case REQ_READ: req->result = req->offs >= 0
		1239	? pread (req->int1, req->ptr1, req->size, req->offs)
		1240	: read (req->int1, req->ptr1, req->size); break;
		1241	case REQ_WRITE: req->result = req->offs >= 0
		1242	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1243	: write (req->int1, req->ptr1, req->size); break;
		1244
		1245	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1246	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1247
		1248	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1249	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1250	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1251
		1252	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1253	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1254	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1255	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1256	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1257	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1258
		1259	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1260	case REQ_CLOSE: req->result = PerlIO_close ((PerlIO *)req->ptr1); break;
		1261	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1262	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1263	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1264	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1265	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1266	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1267	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1268	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1269
		1270	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1271	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1272	case REQ_READDIR: scandir_ (req, self); break;
		1273
		1274	case REQ_BUSY:
		1275	#ifdef _WIN32
		1276	Sleep (req->nv1 * 1000.);
		1277	#else
		1278	{
		1279	struct timeval tv;
		1280
		1281	tv.tv_sec = req->nv1;
		1282	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1283
		1284	req->result = select (0, 0, 0, 0, &tv);
		1285	}
		1286	#endif
		1287	break;
		1288
		1289	case REQ_UTIME:
		1290	case REQ_FUTIME:
		1291	{
		1292	struct timeval tv[2];
		1293	struct timeval *times;
		1294
		1295	if (req->nv1 != -1. || req->nv2 != -1.)
		1296	{
		1297	tv[0].tv_sec = req->nv1;
		1298	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1299	tv[1].tv_sec = req->nv2;
		1300	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1301
		1302	times = tv;
		1303	}
		1304	else
		1305	times = 0;
		1306
		1307
		1308	req->result = req->type == REQ_FUTIME
		1309	? futimes (req->int1, times)
		1310	: utimes (req->ptr1, times);
		1311	}
		1312
		1313	case REQ_GROUP:
		1314	case REQ_NOP:
		1315	break;
		1316
		1317	case REQ_QUIT:
		1318	goto quit;
		1319
		1320	default:
		1321	req->result = -1;
		1322	break;
		1323	}
		1324
		1325	req->errorno = errno;
		1326
		1327	X_LOCK (reslock);
		1328
		1329	++npending;
		1330
		1331	if (!reqq_push (&res_queue, req))
339	{	1332	{
340	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1333	/* write a dummy byte to the pipe so fh becomes ready */
341	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1334	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
342		1335
343	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1336	/* optionally signal the main thread asynchronously */
344		1337	if (main_sig)
345	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1338	pthread_kill (main_tid, main_sig);
346	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
347	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
348
349	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
350	case REQ_CLOSE: req->result = close (req->fd); break;
351	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
352
353	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
354	case REQ_FSYNC: req->result = fsync (req->fd); break;
355
356	case REQ_QUIT:
357	break;
358
359	default:
360	req->result = ENOSYS;
361	break;
362	}	1339	}
363		1340
364	req->errorno = errno;	1341	self->req = 0;
		1342	worker_clear (self);
365		1343
366	pthread_mutex_lock (&reslock);	1344	X_UNLOCK (reslock);
367
368	req->next = 0;
369
370	if (rese)
371	{
372	rese->next = req;
373	rese = req;
374	}
375	else
376	{
377	rese = ress = req;
378
379	/* write a dummy byte to the pipe so fh becomes ready */
380	write (respipe [1], &respipe, 1);
381	}
382
383	pthread_mutex_unlock (&reslock);
384	}	1345	}
385	while (type != REQ_QUIT);	1346
		1347	quit:
		1348	X_LOCK (wrklock);
		1349	worker_free (self);
		1350	X_UNLOCK (wrklock);
386		1351
387	return 0;	1352	return 0;
		1353	}//D
388	}	1354	}
389		1355
		1356	/*****************************************************************************/
		1357
		1358	static void atfork_prepare (void)
		1359	{
		1360	X_LOCK (wrklock);
		1361	X_LOCK (reqlock);
		1362	X_LOCK (reslock);
		1363	#if !HAVE_PREADWRITE
		1364	X_LOCK (preadwritelock);
		1365	#endif
		1366	#if !HAVE_READDIR_R
		1367	X_LOCK (readdirlock);
		1368	#endif
		1369	}
		1370
		1371	static void atfork_parent (void)
		1372	{
		1373	#if !HAVE_READDIR_R
		1374	X_UNLOCK (readdirlock);
		1375	#endif
		1376	#if !HAVE_PREADWRITE
		1377	X_UNLOCK (preadwritelock);
		1378	#endif
		1379	X_UNLOCK (reslock);
		1380	X_UNLOCK (reqlock);
		1381	X_UNLOCK (wrklock);
		1382	}
		1383
		1384	static void atfork_child (void)
		1385	{
		1386	aio_req prv;
		1387
		1388	while (prv = reqq_shift (&req_queue))
		1389	req_destroy (prv);
		1390
		1391	while (prv = reqq_shift (&res_queue))
		1392	req_destroy (prv);
		1393
		1394	while (wrk_first.next != &wrk_first)
		1395	{
		1396	worker *wrk = wrk_first.next;
		1397
		1398	if (wrk->req)
		1399	req_destroy (wrk->req);
		1400
		1401	worker_clear (wrk);
		1402	worker_free (wrk);
		1403	}
		1404
		1405	started = 0;
		1406	idle = 0;
		1407	nreqs = 0;
		1408	nready = 0;
		1409	npending = 0;
		1410
		1411	create_respipe ();
		1412
		1413	atfork_parent ();
		1414	}
		1415
		1416	#define dREQ \
		1417	aio_req req; \
		1418	int req_pri = next_pri; \
		1419	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1420	\
		1421	if (SvOK (callback) && !SvROK (callback)) \
		1422	croak ("callback must be undef or of reference type"); \
		1423	\
		1424	Newz (0, req, 1, aio_cb); \
		1425	if (!req) \
		1426	croak ("out of memory during aio_req allocation"); \
		1427	\
		1428	req->callback = newSVsv (callback); \
		1429	req->pri = req_pri
		1430
		1431	#define REQ_SEND \
		1432	req_send (req); \
		1433	\
		1434	if (GIMME_V != G_VOID) \
		1435	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1436
390	MODULE = IO::AIO PACKAGE = IO::AIO	1437	MODULE = IO::AIO PACKAGE = IO::AIO
391		1438
392	PROTOTYPES: ENABLE	1439	PROTOTYPES: ENABLE
393		1440
394	BOOT:	1441	BOOT:
395	{	1442	{
396	if (pipe (respipe))	1443	stash = gv_stashpv ("IO::AIO", 1);
397	croak ("unable to initialize result pipe");
398		1444
399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1445	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
400	croak ("cannot set result pipe to nonblocking mode");	1446	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1447	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1448	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1449	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1450	#ifdef _WIN32
		1451	X_MUTEX_CHECK (wrklock);
		1452	X_MUTEX_CHECK (reslock);
		1453	X_MUTEX_CHECK (reqlock);
		1454	X_MUTEX_CHECK (reqwait);
		1455	X_MUTEX_CHECK (preadwritelock);
		1456	X_MUTEX_CHECK (readdirlock);
401		1457
402	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1458	X_COND_CHECK (reqwait);
403	croak ("cannot set result pipe to nonblocking mode");	1459	#else
404	}	1460	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1461	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1462	#endif
405		1463
		1464	create_respipe ();
		1465
		1466	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
		1467	}
		1468
406	void	1469	void
407	min_parallel(nthreads)	1470	max_poll_reqs (int nreqs)
408	int nthreads
409	PROTOTYPE: $	1471	PROTOTYPE: $
410	CODE:	1472	CODE:
411	while (nthreads > started)	1473	max_poll_reqs = nreqs;
412	start_thread ();
413		1474
414	void	1475	void
415	max_parallel(nthreads)	1476	max_poll_time (double nseconds)
416	int nthreads
417	PROTOTYPE: $	1477	PROTOTYPE: $
418	CODE:	1478	CODE:
419	{	1479	max_poll_time = nseconds * AIO_TICKS;
420	int cur = started;
421	while (cur > nthreads)
422	{
423	end_thread ();
424	cur--;
425	}
426		1480
427	while (started > nthreads)	1481	void
428	{	1482	min_parallel (int nthreads)
429	poll_wait ();	1483	PROTOTYPE: $
430	poll_cb ();	1484
431	}	1485	void
432	}	1486	max_parallel (int nthreads)
		1487	PROTOTYPE: $
		1488
		1489	void
		1490	max_idle (int nthreads)
		1491	PROTOTYPE: $
		1492	CODE:
		1493	set_max_idle (nthreads);
433		1494
434	int	1495	int
435	max_outstanding(nreqs)	1496	max_outstanding (int maxreqs)
436	int nreqs	1497	PROTOTYPE: $
437	PROTOTYPE: $
438	CODE:	1498	CODE:
439	RETVAL = max_outstanding;	1499	RETVAL = max_outstanding;
440	max_outstanding = nreqs;	1500	max_outstanding = maxreqs;
		1501	OUTPUT:
		1502	RETVAL
441		1503
442	void	1504	void
443	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1505	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
444	SV * pathname
445	int flags
446	int mode
447	SV * callback
448	PROTOTYPE: $$$;$	1506	PROTOTYPE: $$$;$
449	CODE:	1507	PPCODE:
450	{	1508	{
451	aio_req req;	1509	dREQ;
452
453	Newz (0, req, 1, aio_cb);
454
455	if (!req)
456	croak ("out of memory during aio_req allocation");
457		1510
458	req->type = REQ_OPEN;	1511	req->type = REQ_OPEN;
459	req->data = newSVsv (pathname);	1512	req->sv1 = newSVsv (pathname);
460	req->dataptr = SvPV_nolen (req->data);	1513	req->ptr1 = SvPVbyte_nolen (req->sv1);
461	req->fd = flags;	1514	req->int1 = flags;
462	req->mode = mode;	1515	req->mode = mode;
463	req->callback = SvREFCNT_inc (callback);
464		1516
465	send_req (req);	1517	REQ_SEND;
466	}	1518	}
467		1519
468	void	1520	void
469	aio_close(fh,callback=&PL_sv_undef)	1521	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
470	SV * fh
471	SV * callback
472	PROTOTYPE: $;$	1522	PROTOTYPE: $;$
473	ALIAS:	1523	ALIAS:
474	aio_close = REQ_CLOSE
475	aio_fsync = REQ_FSYNC	1524	aio_fsync = REQ_FSYNC
476	aio_fdatasync = REQ_FDATASYNC	1525	aio_fdatasync = REQ_FDATASYNC
477	CODE:	1526	PPCODE:
478	{	1527	{
479	aio_req req;	1528	dREQ;
480
481	Newz (0, req, 1, aio_cb);
482
483	if (!req)
484	croak ("out of memory during aio_req allocation");
485		1529
486	req->type = ix;	1530	req->type = ix;
487	req->fh = newSVsv (fh);	1531	req->sv1 = newSVsv (fh);
488	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1532	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
489	req->callback = SvREFCNT_inc (callback);
490		1533
491	send_req (req);	1534	REQ_SEND (req);
492	}	1535	}
493		1536
494	void	1537	void
		1538	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1539	PROTOTYPE: $;$
		1540	PPCODE:
		1541	{
		1542	PerlIO *io = IoIFP (sv_2io (fh));
		1543	int fd = PerlIO_fileno (io);
		1544
		1545	if (fd < 0)
		1546	croak ("aio_close called with fd-less filehandle");
		1547
		1548	PerlIO_binmode (io, 0, 0, 0);
		1549
		1550	{
		1551	dREQ;
		1552
		1553	req->type = REQ_CLOSE;
		1554	req->sv1 = newSVsv (fh);
		1555	req->ptr1 = (void *)io;
		1556
		1557	REQ_SEND (req);
		1558	}
		1559	}
		1560
		1561	void
495	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1562	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
496	SV * fh
497	UV offset
498	IV length
499	SV * data
500	IV dataoffset
501	SV * callback
502	ALIAS:	1563	ALIAS:
503	aio_read = REQ_READ	1564	aio_read = REQ_READ
504	aio_write = REQ_WRITE	1565	aio_write = REQ_WRITE
505	PROTOTYPE: $$$$$;$	1566	PROTOTYPE: $$$$$;$
506	CODE:	1567	PPCODE:
507	{	1568	{
508	aio_req req;
509	STRLEN svlen;	1569	STRLEN svlen;
510	char *svptr = SvPV (data, svlen);	1570	char *svptr = SvPVbyte (data, svlen);
		1571	UV len = SvUV (length);
511		1572
512	SvUPGRADE (data, SVt_PV);	1573	SvUPGRADE (data, SVt_PV);
513	SvPOK_on (data);	1574	SvPOK_on (data);
514		1575
515	if (dataoffset < 0)	1576	if (dataoffset < 0)
516	dataoffset += svlen;	1577	dataoffset += svlen;
517		1578
518	if (dataoffset < 0 || dataoffset > svlen)	1579	if (dataoffset < 0 || dataoffset > svlen)
519	croak ("data offset outside of string");	1580	croak ("dataoffset outside of data scalar");
520		1581
521	if (ix == REQ_WRITE)	1582	if (ix == REQ_WRITE)
522	{	1583	{
523	/* write: check length and adjust. */	1584	/* write: check length and adjust. */
524	if (length < 0 || length + dataoffset > svlen)	1585	if (!SvOK (length) || len + dataoffset > svlen)
525	length = svlen - dataoffset;	1586	len = svlen - dataoffset;
526	}	1587	}
527	else	1588	else
528	{	1589	{
529	/* read: grow scalar as necessary */	1590	/* read: grow scalar as necessary */
530	svptr = SvGROW (data, length + dataoffset);	1591	svptr = SvGROW (data, len + dataoffset + 1);
531	}	1592	}
532		1593
533	if (length < 0)	1594	if (len < 0)
534	croak ("length must not be negative");	1595	croak ("length must not be negative");
535		1596
536	Newz (0, req, 1, aio_cb);	1597	{
		1598	dREQ;
537		1599
538	if (!req)
539	croak ("out of memory during aio_req allocation");
540
541	req->type = ix;	1600	req->type = ix;
542	req->fh = newSVsv (fh);	1601	req->sv1 = newSVsv (fh);
543	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1602	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
544	: IoOFP (sv_2io (fh)));	1603	: IoOFP (sv_2io (fh)));
545	req->offset = offset;	1604	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
546	req->length = length;	1605	req->size = len;
547	req->data = SvREFCNT_inc (data);	1606	req->sv2 = SvREFCNT_inc (data);
548	req->dataptr = (char *)svptr + dataoffset;	1607	req->ptr1 = (char *)svptr + dataoffset;
549	req->callback = SvREFCNT_inc (callback);	1608	req->stroffset = dataoffset;
550		1609
551	send_req (req);	1610	if (!SvREADONLY (data))
552	}	1611	{
		1612	SvREADONLY_on (data);
		1613	req->flags |= FLAG_SV2_RO_OFF;
		1614	}
553		1615
		1616	REQ_SEND;
		1617	}
		1618	}
		1619
554	void	1620	void
		1621	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1622	PROTOTYPE: $$;$
		1623	PPCODE:
		1624	{
		1625	SV *data;
		1626	dREQ;
		1627
		1628	data = newSV (NAME_MAX);
		1629	SvPOK_on (data);
		1630
		1631	req->type = REQ_READLINK;
		1632	req->sv1 = newSVsv (path);
		1633	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1634	req->sv2 = data;
		1635	req->ptr1 = SvPVbyte_nolen (data);
		1636
		1637	REQ_SEND;
		1638	}
		1639
		1640	void
		1641	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		1642	PROTOTYPE: $$$$;$
		1643	PPCODE:
		1644	{
		1645	dREQ;
		1646
		1647	req->type = REQ_SENDFILE;
		1648	req->sv1 = newSVsv (out_fh);
		1649	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1650	req->sv2 = newSVsv (in_fh);
		1651	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1652	req->offs = SvVAL64 (in_offset);
		1653	req->size = length;
		1654
		1655	REQ_SEND;
		1656	}
		1657
		1658	void
555	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1659	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
556	SV * fh
557	UV offset
558	IV length
559	SV * callback
560	PROTOTYPE: $$$;$	1660	PROTOTYPE: $$$;$
561	CODE:	1661	PPCODE:
562	{	1662	{
563	aio_req req;	1663	dREQ;
564
565	if (length < 0)
566	croak ("length must not be negative");
567
568	Newz (0, req, 1, aio_cb);
569
570	if (!req)
571	croak ("out of memory during aio_req allocation");
572		1664
573	req->type = REQ_READAHEAD;	1665	req->type = REQ_READAHEAD;
574	req->fh = newSVsv (fh);	1666	req->sv1 = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1667	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
576	req->offset = offset;	1668	req->offs = SvVAL64 (offset);
577	req->length = length;	1669	req->size = length;
578	req->callback = SvREFCNT_inc (callback);
579		1670
580	send_req (req);	1671	REQ_SEND;
581	}	1672	}
582		1673
583	void	1674	void
584	aio_stat(fh_or_path,callback=&PL_sv_undef)	1675	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
585	SV * fh_or_path
586	SV * callback
587	ALIAS:	1676	ALIAS:
588	aio_stat = REQ_STAT	1677	aio_stat = REQ_STAT
589	aio_lstat = REQ_LSTAT	1678	aio_lstat = REQ_LSTAT
590	CODE:	1679	PPCODE:
591	{	1680	{
592	aio_req req;	1681	dREQ;
593		1682
594	Newz (0, req, 1, aio_cb);	1683	req->ptr2 = malloc (sizeof (Stat_t));
595
596	if (!req)	1684	if (!req->ptr2)
597	croak ("out of memory during aio_req allocation");	1685	{
598		1686	req_destroy (req);
599	New (0, req->statdata, 1, Stat_t);
600
601	if (!req->statdata)
602	croak ("out of memory during aio_req->statdata allocation");	1687	croak ("out of memory during aio_stat statdata allocation");
		1688	}
		1689
		1690	req->flags |= FLAG_PTR2_FREE;
		1691	req->sv1 = newSVsv (fh_or_path);
603		1692
604	if (SvPOK (fh_or_path))	1693	if (SvPOK (fh_or_path))
605	{	1694	{
606	req->type = ix;	1695	req->type = ix;
607	req->data = newSVsv (fh_or_path);
608	req->dataptr = SvPV_nolen (req->data);	1696	req->ptr1 = SvPVbyte_nolen (req->sv1);
609	}	1697	}
610	else	1698	else
611	{	1699	{
612	req->type = REQ_FSTAT;	1700	req->type = REQ_FSTAT;
613	req->fh = newSVsv (fh_or_path);
614	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1701	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
615	}	1702	}
616		1703
617	req->callback = SvREFCNT_inc (callback);	1704	REQ_SEND;
618
619	send_req (req);
620	}	1705	}
621		1706
622	void	1707	void
		1708	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1709	PPCODE:
		1710	{
		1711	dREQ;
		1712
		1713	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1714	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1715	req->sv1 = newSVsv (fh_or_path);
		1716
		1717	if (SvPOK (fh_or_path))
		1718	{
		1719	req->type = REQ_UTIME;
		1720	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1721	}
		1722	else
		1723	{
		1724	req->type = REQ_FUTIME;
		1725	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1726	}
		1727
		1728	REQ_SEND;
		1729	}
		1730
		1731	void
		1732	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1733	PPCODE:
		1734	{
		1735	dREQ;
		1736
		1737	req->sv1 = newSVsv (fh_or_path);
		1738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1739
		1740	if (SvPOK (fh_or_path))
		1741	{
		1742	req->type = REQ_TRUNCATE;
		1743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1744	}
		1745	else
		1746	{
		1747	req->type = REQ_FTRUNCATE;
		1748	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1749	}
		1750
		1751	REQ_SEND;
		1752	}
		1753
		1754	void
		1755	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1756	PPCODE:
		1757	{
		1758	dREQ;
		1759
		1760	req->mode = mode;
		1761	req->sv1 = newSVsv (fh_or_path);
		1762
		1763	if (SvPOK (fh_or_path))
		1764	{
		1765	req->type = REQ_CHMOD;
		1766	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1767	}
		1768	else
		1769	{
		1770	req->type = REQ_FCHMOD;
		1771	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1772	}
		1773
		1774	REQ_SEND;
		1775	}
		1776
		1777	void
		1778	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1779	PPCODE:
		1780	{
		1781	dREQ;
		1782
		1783	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1784	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1785	req->sv1 = newSVsv (fh_or_path);
		1786
		1787	if (SvPOK (fh_or_path))
		1788	{
		1789	req->type = REQ_CHOWN;
		1790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1791	}
		1792	else
		1793	{
		1794	req->type = REQ_FCHOWN;
		1795	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1796	}
		1797
		1798	REQ_SEND;
		1799	}
		1800
		1801	void
623	aio_unlink(pathname,callback=&PL_sv_undef)	1802	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
624	SV * pathname	1803	ALIAS:
625	SV * callback	1804	aio_unlink = REQ_UNLINK
		1805	aio_rmdir = REQ_RMDIR
		1806	aio_readdir = REQ_READDIR
		1807	PPCODE:
		1808	{
		1809	dREQ;
		1810
		1811	req->type = ix;
		1812	req->sv1 = newSVsv (pathname);
		1813	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1814
		1815	REQ_SEND;
		1816	}
		1817
		1818	void
		1819	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1820	PPCODE:
		1821	{
		1822	dREQ;
		1823
		1824	req->type = REQ_MKDIR;
		1825	req->sv1 = newSVsv (pathname);
		1826	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1827	req->mode = mode;
		1828
		1829	REQ_SEND;
		1830	}
		1831
		1832	void
		1833	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1834	ALIAS:
		1835	aio_link = REQ_LINK
		1836	aio_symlink = REQ_SYMLINK
		1837	aio_rename = REQ_RENAME
		1838	PPCODE:
		1839	{
		1840	dREQ;
		1841
		1842	req->type = ix;
		1843	req->sv2 = newSVsv (oldpath);
		1844	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1845	req->sv1 = newSVsv (newpath);
		1846	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1847
		1848	REQ_SEND;
		1849	}
		1850
		1851	void
		1852	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1853	PPCODE:
		1854	{
		1855	dREQ;
		1856
		1857	req->type = REQ_MKNOD;
		1858	req->sv1 = newSVsv (pathname);
		1859	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1860	req->mode = (mode_t)mode;
		1861	req->offs = dev;
		1862
		1863	REQ_SEND;
		1864	}
		1865
		1866	void
		1867	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1868	PPCODE:
		1869	{
		1870	dREQ;
		1871
		1872	req->type = REQ_BUSY;
		1873	req->nv1 = delay < 0. ? 0. : delay;
		1874
		1875	REQ_SEND;
		1876	}
		1877
		1878	void
		1879	aio_group (SV *callback=&PL_sv_undef)
		1880	PROTOTYPE: ;$
		1881	PPCODE:
		1882	{
		1883	dREQ;
		1884
		1885	req->type = REQ_GROUP;
		1886
		1887	req_send (req);
		1888	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1889	}
		1890
		1891	void
		1892	aio_nop (SV *callback=&PL_sv_undef)
		1893	PPCODE:
		1894	{
		1895	dREQ;
		1896
		1897	req->type = REQ_NOP;
		1898
		1899	REQ_SEND;
		1900	}
		1901
		1902	int
		1903	aioreq_pri (int pri = 0)
		1904	PROTOTYPE: ;$
626	CODE:	1905	CODE:
627	{	1906	RETVAL = next_pri - PRI_BIAS;
628	aio_req req;	1907	if (items > 0)
629		1908	{
630	Newz (0, req, 1, aio_cb);	1909	if (pri < PRI_MIN) pri = PRI_MIN;
631		1910	if (pri > PRI_MAX) pri = PRI_MAX;
632	if (!req)	1911	next_pri = pri + PRI_BIAS;
633	croak ("out of memory during aio_req allocation");	1912	}
634		1913	OUTPUT:
635	req->type = REQ_UNLINK;	1914	RETVAL
636	req->data = newSVsv (pathname);
637	req->dataptr = SvPV_nolen (req->data);
638	req->callback = SvREFCNT_inc (callback);
639
640	send_req (req);
641	}
642		1915
643	void	1916	void
		1917	aioreq_nice (int nice = 0)
		1918	CODE:
		1919	nice = next_pri - nice;
		1920	if (nice < PRI_MIN) nice = PRI_MIN;
		1921	if (nice > PRI_MAX) nice = PRI_MAX;
		1922	next_pri = nice + PRI_BIAS;
		1923
		1924	void
644	flush()	1925	flush ()
645	PROTOTYPE:	1926	PROTOTYPE:
646	CODE:	1927	CODE:
647	while (nreqs)	1928	while (nreqs)
648	{	1929	{
649	poll_wait ();	1930	poll_wait ();
650	poll_cb ();	1931	poll_cb ();
651	}	1932	}
652		1933
653	void	1934	int
654	poll()	1935	poll()
655	PROTOTYPE:	1936	PROTOTYPE:
656	CODE:	1937	CODE:
657	if (nreqs)
658	{
659	poll_wait ();	1938	poll_wait ();
660	poll_cb ();	1939	RETVAL = poll_cb ();
661	}	1940	OUTPUT:
		1941	RETVAL
662		1942
663	int	1943	int
664	poll_fileno()	1944	poll_fileno()
665	PROTOTYPE:	1945	PROTOTYPE:
666	CODE:	1946	CODE:
…		…
678		1958
679	void	1959	void
680	poll_wait()	1960	poll_wait()
681	PROTOTYPE:	1961	PROTOTYPE:
682	CODE:	1962	CODE:
683	if (nreqs)
684	poll_wait ();	1963	poll_wait ();
		1964
		1965	void
		1966	setsig (int signum = SIGIO)
		1967	PROTOTYPE: ;$
		1968	CODE:
		1969	{
		1970	if (block_sig_level)
		1971	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1972
		1973	X_LOCK (reslock);
		1974	main_tid = pthread_self ();
		1975	main_sig = signum;
		1976	X_UNLOCK (reslock);
		1977
		1978	if (main_sig && npending)
		1979	pthread_kill (main_tid, main_sig);
		1980	}
		1981
		1982	void
		1983	aio_block (SV *cb)
		1984	PROTOTYPE: &
		1985	PPCODE:
		1986	{
		1987	int count;
		1988
		1989	block_sig ();
		1990	PUSHMARK (SP);
		1991	PUTBACK;
		1992	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1993	SPAGAIN;
		1994	unblock_sig ();
		1995
		1996	if (SvTRUE (ERRSV))
		1997	croak (0);
		1998
		1999	XSRETURN (count);
		2000	}
685		2001
686	int	2002	int
687	nreqs()	2003	nreqs()
688	PROTOTYPE:	2004	PROTOTYPE:
689	CODE:	2005	CODE:
690	RETVAL = nreqs;	2006	RETVAL = nreqs;
691	OUTPUT:	2007	OUTPUT:
692	RETVAL	2008	RETVAL
693		2009
		2010	int
		2011	nready()
		2012	PROTOTYPE:
		2013	CODE:
		2014	RETVAL = get_nready ();
		2015	OUTPUT:
		2016	RETVAL
		2017
		2018	int
		2019	npending()
		2020	PROTOTYPE:
		2021	CODE:
		2022	RETVAL = get_npending ();
		2023	OUTPUT:
		2024	RETVAL
		2025
		2026	int
		2027	nthreads()
		2028	PROTOTYPE:
		2029	CODE:
		2030	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		2031	RETVAL = started;
		2032	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		2033	OUTPUT:
		2034	RETVAL
		2035
		2036	PROTOTYPES: DISABLE
		2037
		2038	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2039
		2040	void
		2041	cancel (aio_req_ornot req)
		2042	CODE:
		2043	req_cancel (req);
		2044
		2045	void
		2046	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		2047	CODE:
		2048	SvREFCNT_dec (req->callback);
		2049	req->callback = newSVsv (callback);
		2050
		2051	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2052
		2053	void
		2054	add (aio_req grp, ...)
		2055	PPCODE:
		2056	{
		2057	int i;
		2058	aio_req req;
		2059
		2060	if (main_sig && !block_sig_level)
		2061	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		2062
		2063	if (grp->int1 == 2)
		2064	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2065
		2066	for (i = 1; i < items; ++i )
		2067	{
		2068	if (GIMME_V != G_VOID)
		2069	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2070
		2071	req = SvAIO_REQ (ST (i));
		2072
		2073	if (req)
		2074	{
		2075	++grp->size;
		2076	req->grp = grp;
		2077
		2078	req->grp_prev = 0;
		2079	req->grp_next = grp->grp_first;
		2080
		2081	if (grp->grp_first)
		2082	grp->grp_first->grp_prev = req;
		2083
		2084	grp->grp_first = req;
		2085	}
		2086	}
		2087	}
		2088
		2089	void
		2090	cancel_subs (aio_req_ornot req)
		2091	CODE:
		2092	req_cancel_subs (req);
		2093
		2094	void
		2095	result (aio_req grp, ...)
		2096	CODE:
		2097	{
		2098	int i;
		2099	AV *av;
		2100
		2101	grp->errorno = errno;
		2102
		2103	av = newAV ();
		2104
		2105	for (i = 1; i < items; ++i )
		2106	av_push (av, newSVsv (ST (i)));
		2107
		2108	SvREFCNT_dec (grp->sv1);
		2109	grp->sv1 = (SV *)av;
		2110	}
		2111
		2112	void
		2113	errno (aio_req grp, int errorno = errno)
		2114	CODE:
		2115	grp->errorno = errorno;
		2116
		2117	void
		2118	limit (aio_req grp, int limit)
		2119	CODE:
		2120	grp->int2 = limit;
		2121	aio_grp_feed (grp);
		2122
		2123	void
		2124	feed (aio_req grp, SV *callback=&PL_sv_undef)
		2125	CODE:
		2126	{
		2127	SvREFCNT_dec (grp->sv2);
		2128	grp->sv2 = newSVsv (callback);
		2129
		2130	if (grp->int2 <= 0)
		2131	grp->int2 = 2;
		2132
		2133	aio_grp_feed (grp);
		2134	}
		2135

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