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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 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>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/types.h>	12	#include <sys/types.h>
15	#include <sys/stat.h>	13	#include <sys/stat.h>
16	#include <limits.h>	14	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	15	#include <fcntl.h>
19	#include <signal.h>
20	#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
21		68
22	#if HAVE_SENDFILE	69	#if HAVE_SENDFILE
23	# if __linux	70	# if __linux
24	# include <sys/sendfile.h>	71	# include <sys/sendfile.h>
25	# elif __freebsd	72	# elif __freebsd
…		…
32	# else	79	# else
33	# error sendfile support requested but not available	80	# error sendfile support requested but not available
34	# endif	81	# endif
35	#endif	82	#endif
36		83
		84	/* number of seconds after which idle threads exit */
		85	#define IDLE_TIMEOUT 10
		86
37	/* used for struct dirent, AIX doesn't provide it */	87	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	88	#ifndef NAME_MAX
39	# define NAME_MAX 4096	89	# define NAME_MAX 4096
40	#endif	90	#endif
41		91
42	#if __ia64	92	/* buffer size for various temporary buffers */
43	# 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
44	#else	98	#else
45	# define STACKSIZE 8192	99	# define SvVAL64 SvNV
46	#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 */
47		113
48	enum {	114	enum {
49	REQ_QUIT,	115	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	116	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	117	REQ_READ, REQ_WRITE,
52	REQ_SENDFILE,	118	REQ_READAHEAD, REQ_SENDFILE,
53	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,
54	REQ_FSYNC, REQ_FDATASYNC,	124	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	125	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
56	REQ_READDIR,	126	REQ_MKNOD, REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	127	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		128	REQ_GROUP, REQ_NOP,
		129	REQ_BUSY,
58	};	130	};
59		131
60	#define AIO_CB_KLASS "IO::AIO::CB"	132	#define AIO_REQ_KLASS "IO::AIO::REQ"
		133	#define AIO_GRP_KLASS "IO::AIO::GRP"
61		134
62	typedef struct aio_cb	135	typedef struct aio_cb
63	{	136	{
64	struct aio_cb *grp_prev, *grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;	137	struct aio_cb *volatile next;
68		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;
		148	int type;
		149	int int1, int2, int3;
		150	int errorno;
		151	mode_t mode; /* open */
		152
		153	unsigned char flags;
		154	unsigned char pri;
		155
69	SV *self; /* the perl counterpart of this request, if any */	156	SV *self; /* the perl counterpart of this request, if any */
70		157	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	int type;
80	int fd, fd2;
81	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */
84	unsigned char cancelled;
85	} aio_cb;	158	} aio_cb;
		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	};
86		165
87	typedef aio_cb *aio_req;	166	typedef aio_cb *aio_req;
88	typedef aio_cb *aio_req_ornot;	167	typedef aio_cb *aio_req_ornot;
89		168
90	static int started, wanted;	169	enum {
91	static volatile int nreqs;	170	PRI_MIN = -4,
92	static int max_outstanding = 1<<30;	171	PRI_MAX = 4,
93	static int respipe [2];
94		172
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	173	DEFAULT_PRI = 0,
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	174	PRI_BIAS = -PRI_MIN,
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	175	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		176	};
98		177
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	178	#define AIO_TICKS ((1000000 + 1023) >> 10)
100	static volatile aio_req ress, rese; /* queue start, queue end */
101		179
102	typedef struct aio_grp	180	static unsigned int max_poll_time = 0;
103	{	181	static unsigned int max_poll_reqs = 0;
104	struct aio_cb *first, *last;
105	SV *callback;
106	int busycount;
107	} aio_grp;
108		182
109	static void aio_grp_begin (aio_grp *grp)	183	/* calculcate time difference in ~1/AIO_TICKS of a second */
		184	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
110	{	185	{
111	++grp->busycount;	186	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		187	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
112	}	188	}
113		189
114	static void aio_grp_end (aio_grp *grp)	190	static thread_t main_tid;
115	{	191	static int main_sig;
116	--grp->busycount;	192	static int block_sig_level;
117		193
118	if (grp->busycount)	194	void block_sig ()
		195	{
		196	sigset_t ss;
		197
		198	if (block_sig_level++)
119	return;	199	return;
120		200
121	SvREFCNT_dec (grp->callback);	201	if (!main_sig)
122	grp->callback = 0;	202	return;
123	}
124		203
125	static aio_grp *aio_grp_new ()	204	sigemptyset (&ss);
126	{	205	sigaddset (&ss, main_sig);
127	aio_grp *grp;	206	pthread_sigmask (SIG_BLOCK, &ss, 0);
		207	}
128		208
129	Newz (0, grp, 1, aio_grp);	209	void unblock_sig ()
130	aio_grp_begin (grp);	210	{
		211	sigset_t ss;
131		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
		273	static mutex_t reslock = X_MUTEX_INIT;
		274	static mutex_t reqlock = X_MUTEX_INIT;
		275	static cond_t reqwait = X_COND_INIT;
		276
		277	#if WORDACCESS_UNSAFE
		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)
132	return grp;	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 ();
133	}	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);
134		378
135	/* must be called at most once */	379	/* must be called at most once */
136	static SV *req_sv (aio_req req)	380	static SV *req_sv (aio_req req, const char *klass)
137	{	381	{
		382	if (!req->self)
		383	{
138	req->self = (SV *)newHV ();	384	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	385	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		386	}
140		387
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	388	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142	}	389	}
143		390
144	static aio_req SvAIO_REQ (SV *sv)	391	static aio_req SvAIO_REQ (SV *sv)
145	{	392	{
		393	MAGIC *mg;
		394
146	if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))	395	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
147	croak ("object of class " AIO_CB_KLASS " expected");	396	croak ("object of class " AIO_REQ_KLASS " expected");
148		397
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	398	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		399
151	return mg ? (aio_req)mg->mg_ptr : 0;	400	return mg ? (aio_req)mg->mg_ptr : 0;
152	}	401	}
153		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
		595	if (req->grp)
		596	{
		597	aio_req grp = req->grp;
		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
154	static void req_free (aio_req req)	612	static void req_destroy (aio_req req)
155	{	613	{
156	if (req->self)	614	if (req->self)
157	{	615	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	616	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	617	SvREFCNT_dec (req->self);
160	}	618	}
161		619
162	if (req->data)
163	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	620	SvREFCNT_dec (req->sv1);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	621	SvREFCNT_dec (req->sv2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	622	SvREFCNT_dec (req->callback);
176		623
177	if (req->type == REQ_READDIR && req->result >= 0)	624	if (req->flags & FLAG_PTR2_FREE)
178	free (req->data2ptr);	625	free (req->ptr2);
179		626
180	Safefree (req);	627	Safefree (req);
181	}	628	}
182		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
183	static void	657	static void
184	poll_wait ()	658	create_respipe ()
185	{	659	{
186	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)
187	{	673	{
188	fd_set rfd;	674	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
189	FD_ZERO(&rfd);	675	croak ("unable to initialize result pipe(2)");
190	FD_SET(respipe [0], &rfd);
191		676
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	677	respipe_close (respipe [0]);
		678	respipe [0] = old_readfd;
193	}	679	}
194	}
195		680
196	static int	681	#ifdef _WIN32
197	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 ()
198	{	814	{
199	dSP;	815	dSP;
200	int count = 0;	816	int count = 0;
		817	int maxreqs = max_poll_reqs;
201	int do_croak = 0;	818	int do_croak = 0;
		819	struct timeval tv_start, tv_now;
202	aio_req req;	820	aio_req req;
		821
		822	if (max_poll_time)
		823	gettimeofday (&tv_start, 0);
		824
		825	block_sig ();
203		826
204	for (;;)	827	for (;;)
205	{	828	{
206	pthread_mutex_lock (&reslock);	829	for (;;)
207	req = ress;
208
209	if (req)
210	{	830	{
211	ress = req->next;	831	maybe_start_thread ();
212		832
		833	X_LOCK (reslock);
		834	req = reqq_shift (&res_queue);
		835
213	if (!ress)	836	if (req)
214	{	837	{
		838	--npending;
		839
		840	if (!res_queue.size)
		841	{
215	/* read any signals sent by the worker threads */	842	/* read any signals sent by the worker threads */
216	char buf [32];	843	char buf [4];
217	while (read (respipe [0], buf, 32) == 32)	844	while (respipe_read (respipe [0], buf, 4) == 4)
		845	;
218	;	846	}
219
220	rese = 0;
221	}	847	}
222	}
223		848
224	pthread_mutex_unlock (&reslock);	849	X_UNLOCK (reslock);
225		850
226	if (!req)	851	if (!req)
227	break;	852	break;
228		853
229	nreqs--;	854	--nreqs;
230		855
231	if (req->type == REQ_QUIT)
232	started--;
233	else
234	{
235	int errorno = errno;
236	errno = req->errorno;
237
238	if (req->type == REQ_READ)	856	if (req->type == REQ_GROUP && req->size)
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240
241	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);
243
244	if (req->statdata)
245	{	857	{
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	858	req->int1 = 1; /* mark request as delayed */
247	PL_laststatval = req->result;	859	continue;
248	PL_statcache = *(req->statdata);
249	}
250
251	ENTER;
252	PUSHMARK (SP);
253
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}	860	}
277	else	861	else
278	{	862	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));	863	if (!req_invoke (req))
280
281	if (req->type == REQ_OPEN)
282	{	864	{
283	/* convert fd to fh */
284	SV *fh;
285
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}
295	}
296
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID | G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);	865	req_destroy (req);
		866	unblock_sig ();
306	croak (0);	867	croak (0);
307	}	868	}
		869
		870	count++;
308	}	871	}
309		872
310	LEAVE;	873	req_destroy (req);
311		874
312	errno = errorno;	875	if (maxreqs && !--maxreqs)
313	count++;	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)
		883	break;
		884	}
314	}	885	}
315		886
316	req_free (req);	887	if (nreqs <= max_outstanding)
		888	break;
		889
		890	poll_wait ();
		891
		892	++maxreqs;
317	}	893	}
318		894
		895	unblock_sig ();
319	return count;	896	return count;
320	}
321
322	static void *aio_proc(void *arg);
323
324	static void
325	start_thread (void)
326	{
327	sigset_t fullsigset, oldsigset;
328	pthread_t tid;
329	pthread_attr_t attr;
330
331	pthread_attr_init (&attr);
332	pthread_attr_setstacksize (&attr, STACKSIZE);
333	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334
335	sigfillset (&fullsigset);
336	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337
338	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
339	started++;
340
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);
342	}
343
344	static void
345	req_send (aio_req req)
346	{
347	while (started < wanted && nreqs >= started)
348	start_thread ();
349
350	nreqs++;
351
352	pthread_mutex_lock (&reqlock);
353
354	req->next = 0;
355
356	if (reqe)
357	{
358	reqe->next = req;
359	reqe = req;
360	}
361	else
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);
366
367	if (nreqs > max_outstanding)
368	for (;;)
369	{
370	poll_cb ();
371
372	if (nreqs <= max_outstanding)
373	break;
374
375	poll_wait ();
376	}
377	}
378
379	static void
380	end_thread (void)
381	{
382	aio_req req;
383	Newz (0, req, 1, aio_cb);
384	req->type = REQ_QUIT;
385
386	req_send (req);
387	}
388
389	static void min_parallel (int nthreads)
390	{
391	if (wanted < nthreads)
392	wanted = nthreads;
393	}
394
395	static void max_parallel (int nthreads)
396	{
397	int cur = started;
398
399	if (wanted > nthreads)
400	wanted = nthreads;
401
402	while (cur > wanted)
403	{
404	end_thread ();
405	cur--;
406	}
407
408	while (started > wanted)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}
414
415	static void create_pipe ()
416	{
417	if (pipe (respipe))
418	croak ("unable to initialize result pipe");
419
420	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
421	croak ("cannot set result pipe to nonblocking mode");
422
423	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
424	croak ("cannot set result pipe to nonblocking mode");
425	}	897	}
426		898
427	/*****************************************************************************/	899	/*****************************************************************************/
428	/* work around various missing functions */	900	/* work around various missing functions */
429		901
…		…
434	/*	906	/*
435	* make our pread/pwrite safe against themselves, but not against	907	* make our pread/pwrite safe against themselves, but not against
436	* 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,
437	* but that's your problem, not mine.	909	* but that's your problem, not mine.
438	*/	910	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	911	static mutex_t preadwritelock = X_MUTEX_INIT;
440		912
441	static ssize_t	913	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{	914	{
444	ssize_t res;	915	ssize_t res;
445	off_t ooffset;	916	off_t ooffset;
446		917
447	pthread_mutex_lock (&preadwritelock);	918	X_LOCK (preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);	919	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);	920	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);	921	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);	922	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);	923	X_UNLOCK (preadwritelock);
453		924
454	return res;	925	return res;
455	}	926	}
456		927
457	static ssize_t
458	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)
459	{	929	{
460	ssize_t res;	930	ssize_t res;
461	off_t ooffset;	931	off_t ooffset;
462		932
463	pthread_mutex_lock (&preadwritelock);	933	X_LOCK (preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);	934	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);	935	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);	936	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);	937	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);	938	X_UNLOCK (preadwritelock);
469		939
470	return res;	940	return res;
471	}	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
472	#endif	970	#endif
473		971
474	#if !HAVE_FDATASYNC	972	#if !HAVE_FDATASYNC
475	# define fdatasync fsync	973	# define fdatasync fsync
476	#endif	974	#endif
477		975
478	#if !HAVE_READAHEAD	976	#if !HAVE_READAHEAD
479	# define readahead aio_readahead	977	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
480		978
481	static ssize_t	979	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
482	readahead (int fd, off_t offset, size_t count)
483	{	980	{
484	char readahead_buf[4096];	981	size_t todo = count;
		982	dBUF;
485		983
486	while (count > 0)	984	while (todo > 0)
487	{	985	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	986	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
489		987
490	pread (fd, readahead_buf, len, offset);	988	pread (fd, aio_buf, len, offset);
491	offset += len;	989	offset += len;
492	count -= len;	990	todo -= len;
493	}	991	}
494		992
495	errno = 0;	993	errno = 0;
		994	return count;
496	}	995	}
		996
497	#endif	997	#endif
498		998
499	#if !HAVE_READDIR_R	999	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r	1000	# define readdir_r aio_readdir_r
501		1001
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1002	static mutex_t readdirlock = X_MUTEX_INIT;
503		1003
504	static int	1004	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
505	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506	{	1005	{
507	struct dirent *e;	1006	X_DIRENT *e;
508	int errorno;	1007	int errorno;
509		1008
510	pthread_mutex_lock (&readdirlock);	1009	X_LOCK (readdirlock);
511		1010
512	e = readdir (dirp);	1011	e = readdir (dirp);
513	errorno = errno;	1012	errorno = errno;
514		1013
515	if (e)	1014	if (e)
…		…
518	strcpy (ent->d_name, e->d_name);	1017	strcpy (ent->d_name, e->d_name);
519	}	1018	}
520	else	1019	else
521	*res = 0;	1020	*res = 0;
522		1021
523	pthread_mutex_unlock (&readdirlock);	1022	X_UNLOCK (readdirlock);
524		1023
525	errno = errorno;	1024	errno = errorno;
526	return e ? 0 : -1;	1025	return e ? 0 : -1;
527	}	1026	}
528	#endif	1027	#endif
529		1028
530	/* sendfile always needs emulation */	1029	/* sendfile always needs emulation */
531	static ssize_t
532	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)
533	{	1031	{
534	ssize_t res;	1032	ssize_t res;
535		1033
536	if (!count)	1034	if (!count)
537	return 0;	1035	return 0;
…		…
548	{	1046	{
549	off_t sbytes;	1047	off_t sbytes;
550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1048	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551		1049
552	if (res < 0 && sbytes)	1050	if (res < 0 && sbytes)
553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	1051	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
554	res = sbytes;	1052	res = sbytes;
555	}	1053	}
556		1054
557	# elif __hpux	1055	# elif __hpux
558	res = sendfile (ofd, ifd, offset, count, 0, 0);	1056	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
586	#endif	1084	#endif
587	)	1085	)
588	)	1086	)
589	{	1087	{
590	/* emulate sendfile. this is a major pain in the ass */	1088	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];	1089	dBUF;
		1090
592	res = 0;	1091	res = 0;
593		1092
594	while (count)	1093	while (count)
595	{	1094	{
596	ssize_t cnt;	1095	ssize_t cnt;
597		1096
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	1097	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
599		1098
600	if (cnt <= 0)	1099	if (cnt <= 0)
601	{	1100	{
602	if (cnt && !res) res = -1;	1101	if (cnt && !res) res = -1;
603	break;	1102	break;
604	}	1103	}
605		1104
606	cnt = write (ofd, buf, cnt);	1105	cnt = write (ofd, aio_buf, cnt);
607		1106
608	if (cnt <= 0)	1107	if (cnt <= 0)
609	{	1108	{
610	if (cnt && !res) res = -1;	1109	if (cnt && !res) res = -1;
611	break;	1110	break;
…		…
619		1118
620	return res;	1119	return res;
621	}	1120	}
622		1121
623	/* read a full directory */	1122	/* read a full directory */
624	static int	1123	static void scandir_ (aio_req req, worker *self)
625	scandir_ (const char *path, void **namesp)
626	{	1124	{
627	DIR *dirp = opendir (path);	1125	DIR *dirp;
628	union	1126	union
629	{	1127	{
630	struct dirent d;	1128	X_DIRENT d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1129	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
632	} u;	1130	} *u;
633	struct dirent *entp;	1131	X_DIRENT *entp;
634	char *name, *names;	1132	char *name, *names;
635	int memlen = 4096;	1133	int memlen = 4096;
636	int memofs = 0;	1134	int memofs = 0;
637	int res = 0;	1135	int res = 0;
638	int errorno;
639		1136
640	if (!dirp)	1137	X_LOCK (wrklock);
641	return -1;	1138	self->dirp = dirp = opendir (req->ptr1);
642		1139	self->dbuf = u = malloc (sizeof (*u));
		1140	req->flags |= FLAG_PTR2_FREE;
643	names = malloc (memlen);	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;
		1181	}
		1182
		1183	/*****************************************************************************/
		1184
		1185	X_THREAD_PROC (aio_proc)
		1186	{
		1187	{//D
		1188	aio_req req;
		1189	struct timespec ts;
		1190	worker *self = (worker *)thr_arg;
		1191
		1192	/* try to distribute timeouts somewhat randomly */
		1193	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
644		1194
645	for (;;)	1195	for (;;)
646	{	1196	{
647	errno = 0, readdir_r (dirp, &u.d, &entp);	1197	ts.tv_sec = time (0) + IDLE_TIMEOUT;
648		1198
649	if (!entp)	1199	X_LOCK (reqlock);
650	break;
651
652	name = entp->d_name;
653
654	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655	{
656	int len = strlen (name) + 1;
657
658	res++;
659
660	while (memofs + len > memlen)
661	{
662	memlen *= 2;
663	names = realloc (names, memlen);
664	if (!names)
665	break;
666	}
667
668	memcpy (names + memofs, name, len);
669	memofs += len;
670	}
671	}
672
673	errorno = errno;
674	closedir (dirp);
675
676	if (errorno)
677	{
678	free (names);
679	errno = errorno;
680	res = -1;
681	}
682
683	*namesp = (void *)names;
684	return res;
685	}
686
687	/*****************************************************************************/
688
689	static void *
690	aio_proc (void *thr_arg)
691	{
692	aio_req req;
693	int type;
694
695	do
696	{
697	pthread_mutex_lock (&reqlock);
698		1200
699	for (;;)	1201	for (;;)
700	{	1202	{
701	req = reqs;	1203	self->req = req = reqq_shift (&req_queue);
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708		1204
709	if (req)	1205	if (req)
710	break;	1206	break;
711		1207
712	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;
713	}	1229	}
714		1230
715	pthread_mutex_unlock (&reqlock);	1231	--nready;
		1232
		1233	X_UNLOCK (reqlock);
716		1234
717	errno = 0; /* strictly unnecessary */	1235	errno = 0; /* strictly unnecessary */
718		1236
719	if (!req->cancelled)	1237	if (!(req->flags & FLAG_CANCELLED))
720	switch (req->type)	1238	switch (req->type)
721	{	1239	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1240	case REQ_READ: req->result = req->offs >= 0
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	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;
724		1246
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1247	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1248	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
727		1249
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1250	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1251	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1252	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
731		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
732	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1261	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
733	case REQ_CLOSE: req->result = close (req->fd); break;	1262	case REQ_CLOSE: req->result = close (req->int1); break;
734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1263	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1264	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1265	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1266	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1267	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); 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;
739		1271
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1272	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;	1273	case REQ_FSYNC: req->result = fsync (req->int1); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); 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;
743		1318
744	case REQ_QUIT:	1319	case REQ_QUIT:
745	break;	1320	goto quit;
746		1321
747	default:	1322	default:
748	req->result = ENOSYS;	1323	req->result = -1;
749	break;	1324	break;
750	}	1325	}
751		1326
752	req->errorno = errno;	1327	req->errorno = errno;
753		1328
754	pthread_mutex_lock (&reslock);	1329	X_LOCK (reslock);
755		1330
756	req->next = 0;	1331	++npending;
757		1332
758	if (rese)	1333	if (!reqq_push (&res_queue, req))
759	{	1334	{
760	rese->next = req;	1335	/* write a dummy byte to the pipe so fh becomes ready */
761	rese = req;	1336	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		1337
		1338	/* optionally signal the main thread asynchronously */
		1339	if (main_sig)
		1340	pthread_kill (main_tid, main_sig);
762	}	1341	}
763	else
764	{
765	rese = ress = req;
766		1342
767	/* write a dummy byte to the pipe so fh becomes ready */	1343	self->req = 0;
768	write (respipe [1], &respipe, 1);	1344	worker_clear (self);
769	}
770		1345
771	pthread_mutex_unlock (&reslock);	1346	X_UNLOCK (reslock);
772	}	1347	}
773	while (type != REQ_QUIT);	1348
		1349	quit:
		1350	X_LOCK (wrklock);
		1351	worker_free (self);
		1352	X_UNLOCK (wrklock);
774		1353
775	return 0;	1354	return 0;
		1355	}//D
776	}	1356	}
777		1357
778	/*****************************************************************************/	1358	/*****************************************************************************/
779		1359
780	static void atfork_prepare (void)	1360	static void atfork_prepare (void)
781	{	1361	{
782	pthread_mutex_lock (&reqlock);	1362	X_LOCK (wrklock);
783	pthread_mutex_lock (&reslock);	1363	X_LOCK (reqlock);
		1364	X_LOCK (reslock);
784	#if !HAVE_PREADWRITE	1365	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);	1366	X_LOCK (preadwritelock);
786	#endif	1367	#endif
787	#if !HAVE_READDIR_R	1368	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);	1369	X_LOCK (readdirlock);
789	#endif	1370	#endif
790	}	1371	}
791		1372
792	static void atfork_parent (void)	1373	static void atfork_parent (void)
793	{	1374	{
794	#if !HAVE_READDIR_R	1375	#if !HAVE_READDIR_R
795	pthread_mutex_unlock (&readdirlock);	1376	X_UNLOCK (readdirlock);
796	#endif	1377	#endif
797	#if !HAVE_PREADWRITE	1378	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);	1379	X_UNLOCK (preadwritelock);
799	#endif	1380	#endif
800	pthread_mutex_unlock (&reslock);	1381	X_UNLOCK (reslock);
801	pthread_mutex_unlock (&reqlock);	1382	X_UNLOCK (reqlock);
		1383	X_UNLOCK (wrklock);
802	}	1384	}
803		1385
804	static void atfork_child (void)	1386	static void atfork_child (void)
805	{	1387	{
806	aio_req prv;	1388	aio_req prv;
807		1389
808	started = 0;	1390	while (prv = reqq_shift (&req_queue))
		1391	req_destroy (prv);
809		1392
810	while (reqs)	1393	while (prv = reqq_shift (&res_queue))
		1394	req_destroy (prv);
		1395
		1396	while (wrk_first.next != &wrk_first)
811	{	1397	{
812	prv = reqs;	1398	worker *wrk = wrk_first.next;
813	reqs = prv->next;	1399
		1400	if (wrk->req)
		1401	req_destroy (wrk->req);
		1402
		1403	worker_clear (wrk);
814	req_free (prv);	1404	worker_free (wrk);
815	}	1405	}
816		1406
817	reqs = reqe = 0;	1407	started = 0;
818		1408	idle = 0;
819	while (ress)	1409	nreqs = 0;
820	{	1410	nready = 0;
821	prv = ress;	1411	npending = 0;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827		1412
828	close (respipe [0]);
829	close (respipe [1]);
830	create_pipe ();	1413	create_respipe ();
831		1414
832	atfork_parent ();	1415	atfork_parent ();
833	}	1416	}
834		1417
835	#define dREQ \	1418	#define dREQ \
836	aio_req req; \	1419	aio_req req; \
		1420	int req_pri = next_pri; \
		1421	next_pri = DEFAULT_PRI + PRI_BIAS; \
837	\	1422	\
838	if (SvOK (callback) && !SvROK (callback)) \	1423	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \	1424	croak ("callback must be undef or of reference type"); \
840	\	1425	\
841	Newz (0, req, 1, aio_cb); \	1426	Newz (0, req, 1, aio_cb); \
842	if (!req) \	1427	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	1428	croak ("out of memory during aio_req allocation"); \
844	\	1429	\
845	req->callback = newSVsv (callback)	1430	req->callback = newSVsv (callback); \
		1431	req->pri = req_pri
846		1432
847	#define REQ_SEND \	1433	#define REQ_SEND \
848	req_send (req); \	1434	req_send (req); \
849	\	1435	\
850	if (GIMME_V != G_VOID) \	1436	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	1437	XPUSHs (req_sv (req, AIO_REQ_KLASS));
852		1438
853	MODULE = IO::AIO PACKAGE = IO::AIO	1439	MODULE = IO::AIO PACKAGE = IO::AIO
854		1440
855	PROTOTYPES: ENABLE	1441	PROTOTYPES: ENABLE
856		1442
857	BOOT:	1443	BOOT:
858	{	1444	{
859	HV *stash = gv_stashpv ("IO::AIO", 1);	1445	stash = gv_stashpv ("IO::AIO", 1);
		1446
860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1447	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1448	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	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);
863		1459
864	create_pipe ();	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
865	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1468	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
866	}	1469	}
867		1470
868	void	1471	void
869	min_parallel (nthreads)	1472	max_poll_reqs (int nreqs)
870	int nthreads
871	PROTOTYPE: $	1473	PROTOTYPE: $
		1474	CODE:
		1475	max_poll_reqs = nreqs;
872		1476
873	void	1477	void
874	max_parallel (nthreads)	1478	max_poll_time (double nseconds)
875	int nthreads
876	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);
877		1496
878	int	1497	int
879	max_outstanding (nreqs)	1498	max_outstanding (int maxreqs)
880	int nreqs	1499	PROTOTYPE: $
881	PROTOTYPE: $
882	CODE:	1500	CODE:
883	RETVAL = max_outstanding;	1501	RETVAL = max_outstanding;
884	max_outstanding = nreqs;	1502	max_outstanding = maxreqs;
		1503	OUTPUT:
		1504	RETVAL
885		1505
886	void	1506	void
887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1507	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
888	SV * pathname
889	int flags
890	int mode
891	SV * callback
892	PROTOTYPE: $$$;$	1508	PROTOTYPE: $$$;$
893	PPCODE:	1509	PPCODE:
894	{	1510	{
895	dREQ;	1511	dREQ;
896		1512
897	req->type = REQ_OPEN;	1513	req->type = REQ_OPEN;
898	req->data = newSVsv (pathname);	1514	req->sv1 = newSVsv (pathname);
899	req->dataptr = SvPVbyte_nolen (req->data);	1515	req->ptr1 = SvPVbyte_nolen (req->sv1);
900	req->fd = flags;	1516	req->int1 = flags;
901	req->mode = mode;	1517	req->mode = mode;
902		1518
903	REQ_SEND;	1519	REQ_SEND;
904	}	1520	}
905		1521
906	void	1522	void
907	aio_close (fh,callback=&PL_sv_undef)	1523	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
908	SV * fh
909	SV * callback
910	PROTOTYPE: $;$	1524	PROTOTYPE: $;$
911	ALIAS:	1525	ALIAS:
912	aio_close = REQ_CLOSE
913	aio_fsync = REQ_FSYNC	1526	aio_fsync = REQ_FSYNC
914	aio_fdatasync = REQ_FDATASYNC	1527	aio_fdatasync = REQ_FDATASYNC
915	PPCODE:	1528	PPCODE:
916	{	1529	{
917	dREQ;	1530	dREQ;
918		1531
919	req->type = ix;	1532	req->type = ix;
920	req->fh = newSVsv (fh);	1533	req->sv1 = newSVsv (fh);
921	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1534	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
922		1535
923	REQ_SEND (req);	1536	REQ_SEND (req);
924	}	1537	}
925		1538
		1539	int
		1540	_dup (int fd)
		1541	PROTOTYPE: $
		1542	CODE:
		1543	RETVAL = dup (fd);
		1544	OUTPUT:
		1545	RETVAL
		1546
926	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
927	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)
928	SV * fh
929	UV offset
930	UV length
931	SV * data
932	UV dataoffset
933	SV * callback
934	ALIAS:	1562	ALIAS:
935	aio_read = REQ_READ	1563	aio_read = REQ_READ
936	aio_write = REQ_WRITE	1564	aio_write = REQ_WRITE
937	PROTOTYPE: $$$$$;$	1565	PROTOTYPE: $$$$$;$
938	PPCODE:	1566	PPCODE:
939	{	1567	{
940	aio_req req;
941	STRLEN svlen;	1568	STRLEN svlen;
942	char *svptr = SvPVbyte (data, svlen);	1569	char *svptr = SvPVbyte (data, svlen);
		1570	UV len = SvUV (length);
943		1571
944	SvUPGRADE (data, SVt_PV);	1572	SvUPGRADE (data, SVt_PV);
945	SvPOK_on (data);	1573	SvPOK_on (data);
946		1574
947	if (dataoffset < 0)	1575	if (dataoffset < 0)
948	dataoffset += svlen;	1576	dataoffset += svlen;
949		1577
950	if (dataoffset < 0 || dataoffset > svlen)	1578	if (dataoffset < 0 || dataoffset > svlen)
951	croak ("data offset outside of string");	1579	croak ("dataoffset outside of data scalar");
952		1580
953	if (ix == REQ_WRITE)	1581	if (ix == REQ_WRITE)
954	{	1582	{
955	/* write: check length and adjust. */	1583	/* write: check length and adjust. */
956	if (length < 0 || length + dataoffset > svlen)	1584	if (!SvOK (length) || len + dataoffset > svlen)
957	length = svlen - dataoffset;	1585	len = svlen - dataoffset;
958	}	1586	}
959	else	1587	else
960	{	1588	{
961	/* read: grow scalar as necessary */	1589	/* read: grow scalar as necessary */
962	svptr = SvGROW (data, length + dataoffset);	1590	svptr = SvGROW (data, len + dataoffset + 1);
963	}	1591	}
964		1592
965	if (length < 0)	1593	if (len < 0)
966	croak ("length must not be negative");	1594	croak ("length must not be negative");
967		1595
968	{	1596	{
969	dREQ;	1597	dREQ;
970		1598
971	req->type = ix;	1599	req->type = ix;
972	req->fh = newSVsv (fh);	1600	req->sv1 = newSVsv (fh);
973	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1601	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
974	: IoOFP (sv_2io (fh)));	1602	: IoOFP (sv_2io (fh)));
		1603	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
975	req->offset = offset;	1604	req->size = len;
976	req->length = length;
977	req->data = SvREFCNT_inc (data);	1605	req->sv2 = SvREFCNT_inc (data);
978	req->dataptr = (char *)svptr + dataoffset;	1606	req->ptr1 = (char *)svptr + dataoffset;
		1607	req->stroffset = dataoffset;
979		1608
980	if (!SvREADONLY (data))	1609	if (!SvREADONLY (data))
981	{	1610	{
982	SvREADONLY_on (data);	1611	SvREADONLY_on (data);
983	req->data2ptr = (void *)data;	1612	req->flags |= FLAG_SV2_RO_OFF;
984	}	1613	}
985		1614
986	REQ_SEND;	1615	REQ_SEND;
987	}	1616	}
988	}	1617	}
989		1618
990	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
991	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)
992	SV * out_fh
993	SV * in_fh
994	UV in_offset
995	UV length
996	SV * callback
997	PROTOTYPE: $$$$;$	1641	PROTOTYPE: $$$$;$
998	PPCODE:	1642	PPCODE:
999	{	1643	{
1000	dREQ;	1644	dREQ;
1001		1645
1002	req->type = REQ_SENDFILE;	1646	req->type = REQ_SENDFILE;
1003	req->fh = newSVsv (out_fh);	1647	req->sv1 = newSVsv (out_fh);
1004	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1648	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1005	req->fh2 = newSVsv (in_fh);	1649	req->sv2 = newSVsv (in_fh);
1006	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1650	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1007	req->offset = in_offset;	1651	req->offs = SvVAL64 (in_offset);
1008	req->length = length;	1652	req->size = length;
1009		1653
1010	REQ_SEND;	1654	REQ_SEND;
1011	}	1655	}
1012		1656
1013	void	1657	void
1014	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1658	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1015	SV * fh
1016	UV offset
1017	IV length
1018	SV * callback
1019	PROTOTYPE: $$$;$	1659	PROTOTYPE: $$$;$
1020	PPCODE:	1660	PPCODE:
1021	{	1661	{
1022	dREQ;	1662	dREQ;
1023		1663
1024	req->type = REQ_READAHEAD;	1664	req->type = REQ_READAHEAD;
1025	req->fh = newSVsv (fh);	1665	req->sv1 = newSVsv (fh);
1026	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1666	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1027	req->offset = offset;	1667	req->offs = SvVAL64 (offset);
1028	req->length = length;	1668	req->size = length;
1029		1669
1030	REQ_SEND;	1670	REQ_SEND;
1031	}	1671	}
1032		1672
1033	void	1673	void
1034	aio_stat (fh_or_path,callback=&PL_sv_undef)	1674	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1035	SV * fh_or_path
1036	SV * callback
1037	ALIAS:	1675	ALIAS:
1038	aio_stat = REQ_STAT	1676	aio_stat = REQ_STAT
1039	aio_lstat = REQ_LSTAT	1677	aio_lstat = REQ_LSTAT
1040	PPCODE:	1678	PPCODE:
1041	{	1679	{
1042	dREQ;	1680	dREQ;
1043		1681
1044	New (0, req->statdata, 1, Stat_t);	1682	req->ptr2 = malloc (sizeof (Stat_t));
1045	if (!req->statdata)	1683	if (!req->ptr2)
1046	{	1684	{
1047	req_free (req);	1685	req_destroy (req);
1048	croak ("out of memory during aio_req->statdata allocation");	1686	croak ("out of memory during aio_stat statdata allocation");
1049	}	1687	}
		1688
		1689	req->flags |= FLAG_PTR2_FREE;
		1690	req->sv1 = newSVsv (fh_or_path);
1050		1691
1051	if (SvPOK (fh_or_path))	1692	if (SvPOK (fh_or_path))
1052	{	1693	{
1053	req->type = ix;	1694	req->type = ix;
1054	req->data = newSVsv (fh_or_path);
1055	req->dataptr = SvPVbyte_nolen (req->data);	1695	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	}	1696	}
1057	else	1697	else
1058	{	1698	{
1059	req->type = REQ_FSTAT;	1699	req->type = REQ_FSTAT;
1060	req->fh = newSVsv (fh_or_path);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1700	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1062	}	1701	}
1063		1702
1064	REQ_SEND;	1703	REQ_SEND;
1065	}	1704	}
1066		1705
1067	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
1068	aio_unlink (pathname,callback=&PL_sv_undef)	1801	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1069	SV * pathname
1070	SV * callback
1071	ALIAS:	1802	ALIAS:
1072	aio_unlink = REQ_UNLINK	1803	aio_unlink = REQ_UNLINK
1073	aio_rmdir = REQ_RMDIR	1804	aio_rmdir = REQ_RMDIR
1074	aio_readdir = REQ_READDIR	1805	aio_readdir = REQ_READDIR
1075	PPCODE:	1806	PPCODE:
1076	{	1807	{
1077	dREQ;	1808	dREQ;
1078		1809
1079	req->type = ix;	1810	req->type = ix;
1080	req->data = newSVsv (pathname);	1811	req->sv1 = newSVsv (pathname);
1081	req->dataptr = SvPVbyte_nolen (req->data);	1812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1813
		1814	REQ_SEND;
		1815	}
		1816
		1817	void
		1818	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1819	PPCODE:
		1820	{
		1821	dREQ;
1082		1822
		1823	req->type = REQ_MKDIR;
		1824	req->sv1 = newSVsv (pathname);
		1825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1826	req->mode = mode;
		1827
1083	REQ_SEND;	1828	REQ_SEND;
1084	}	1829	}
1085		1830
1086	void	1831	void
1087	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1832	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1088	SV * oldpath
1089	SV * newpath
1090	SV * callback
1091	ALIAS:	1833	ALIAS:
1092	aio_link = REQ_LINK	1834	aio_link = REQ_LINK
1093	aio_symlink = REQ_SYMLINK	1835	aio_symlink = REQ_SYMLINK
1094	aio_rename = REQ_RENAME	1836	aio_rename = REQ_RENAME
1095	PPCODE:	1837	PPCODE:
1096	{	1838	{
1097	dREQ;	1839	dREQ;
1098		1840
1099	req->type = ix;	1841	req->type = ix;
1100	req->fh = newSVsv (oldpath);	1842	req->sv2 = newSVsv (oldpath);
1101	req->data2ptr = SvPVbyte_nolen (req->fh);	1843	req->ptr2 = SvPVbyte_nolen (req->sv2);
1102	req->data = newSVsv (newpath);	1844	req->sv1 = newSVsv (newpath);
1103	req->dataptr = SvPVbyte_nolen (req->data);	1845	req->ptr1 = SvPVbyte_nolen (req->sv1);
1104		1846
1105	REQ_SEND;	1847	REQ_SEND;
1106	}	1848	}
1107		1849
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1850	void
1112	cancel_most_requests ()	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)
1113	PROTOTYPE:	1879	PROTOTYPE: ;$
1114	CODE:	1880	PPCODE:
1115	{	1881	{
1116	aio_req *req;	1882	dREQ;
1117		1883
1118	pthread_mutex_lock (&reqlock);	1884	req->type = REQ_GROUP;
1119	for (req = reqs; req; req = req->next)
1120	req->flags |= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1885
1123	pthread_mutex_lock (&reslock);	1886	req_send (req);
1124	for (req = ress; req; req = req->next)	1887	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1125	req->flags |= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}	1888	}
1128		1889
1129	#endif	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;
1130		1922
1131	void	1923	void
1132	flush ()	1924	flush ()
1133	PROTOTYPE:	1925	PROTOTYPE:
1134	CODE:	1926	CODE:
…		…
1136	{	1928	{
1137	poll_wait ();	1929	poll_wait ();
1138	poll_cb ();	1930	poll_cb ();
1139	}	1931	}
1140		1932
1141	void	1933	int
1142	poll()	1934	poll()
1143	PROTOTYPE:	1935	PROTOTYPE:
1144	CODE:	1936	CODE:
1145	if (nreqs)
1146	{
1147	poll_wait ();	1937	poll_wait ();
1148	poll_cb ();	1938	RETVAL = poll_cb ();
1149	}	1939	OUTPUT:
		1940	RETVAL
1150		1941
1151	int	1942	int
1152	poll_fileno()	1943	poll_fileno()
1153	PROTOTYPE:	1944	PROTOTYPE:
1154	CODE:	1945	CODE:
…		…
1166		1957
1167	void	1958	void
1168	poll_wait()	1959	poll_wait()
1169	PROTOTYPE:	1960	PROTOTYPE:
1170	CODE:	1961	CODE:
1171	if (nreqs)
1172	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	}
1173		2000
1174	int	2001	int
1175	nreqs()	2002	nreqs()
1176	PROTOTYPE:	2003	PROTOTYPE:
1177	CODE:	2004	CODE:
1178	RETVAL = nreqs;	2005	RETVAL = nreqs;
1179	OUTPUT:	2006	OUTPUT:
1180	RETVAL	2007	RETVAL
1181		2008
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	2009	int
1183		2010	nready()
1184	void
1185	cancel (aio_req_ornot req)
1186	PROTOTYPE:	2011	PROTOTYPE:
1187	CODE:	2012	CODE:
1188	req->cancelled = 1;	2013	RETVAL = get_nready ();
		2014	OUTPUT:
		2015	RETVAL
1189		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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