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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.8 by root, Mon Jul 11 02:53:59 2005 UTC vs.
Revision 1.160 by root, Thu Jan 7 18:25:51 2010 UTC

		1	#include "libeio/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
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
5	#include <sys/types.h>	14	#include <sys/types.h>
6	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
7	#include <unistd.h>	17	#include <limits.h>
8	#include <fcntl.h>	18	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	19	#include <sched.h>
11	#include <endian.h>
12		20
13	#include <pthread.h>	21	/* perl namespace pollution */
14	#include <sys/syscall.h>	22	#undef VERSION
15		23
16	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	#ifdef _WIN32
17	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
18	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
19		25
20	#if __ia64	26	# define EIO_STRUCT_DIRENT Direntry_t
21	# define STACKSIZE 65536	27	# undef malloc
		28	# undef free
		29
		30	// perl overrides all those nice win32 functions
		31	# undef open
		32	# undef read
		33	# undef write
		34	# undef send
		35	# undef recv
		36	# undef stat
		37	# undef fstat
		38	# define lstat stat
		39	# undef truncate
		40	# undef ftruncate
		41	# undef open
		42	# undef close
		43	# undef unlink
		44	# undef rmdir
		45	# undef rename
		46	# undef lseek
		47
		48	# define chown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchown(a,b,c) (errno = ENOSYS, -1)
		50	# define fchmod(a,b) (errno = ENOSYS, -1)
		51	# define symlink(a,b) (errno = ENOSYS, -1)
		52	# define readlink(a,b,c) (errno = ENOSYS, -1)
		53	# define mknod(a,b,c) (errno = ENOSYS, -1)
		54	# define truncate(a,b) (errno = ENOSYS, -1)
		55	# define ftruncate(fd,o) chsize ((fd), (o))
		56	# define fsync(fd) _commit (fd)
		57	# define opendir(fd) (errno = ENOSYS, 0)
		58	# define readdir(fd) (errno = ENOSYS, -1)
		59	# define closedir(fd) (errno = ENOSYS, -1)
		60	# define mkdir(a,b) mkdir (a)
		61
22	#else	62	#else
23	# define STACKSIZE 4096	63
		64	# include <sys/time.h>
		65	# include <sys/select.h>
		66	# include <unistd.h>
		67	# include <utime.h>
		68	# include <signal.h>
		69	# define EIO_STRUCT_DIRENT struct dirent
		70
24	#endif	71	#endif
		72
		73	/* perl stupidly overrides readdir and maybe others */
		74	/* with thread-unsafe versions, imagine that :( */
		75	#undef readdir
		76	#undef opendir
		77	#undef closedir
		78
		79	#define EIO_STRUCT_STAT Stat_t
		80
		81	/* use NV for 32 bit perls as it allows larger offsets */
		82	#if IVSIZE >= 8
		83	# define VAL64 IV
		84	# define SvVAL64 SvIV
		85	# define newSVval64 newSViv
		86	#else
		87	# define VAL64 NV
		88	# define SvVAL64 SvNV
		89	# define newSVval64 newSVnv
		90	#endif
		91
		92	/*****************************************************************************/
		93
		94	#if __GNUC__ >= 3
		95	# define expect(expr,value) __builtin_expect ((expr),(value))
		96	#else
		97	# define expect(expr,value) (expr)
		98	#endif
		99
		100	#define expect_false(expr) expect ((expr) != 0, 0)
		101	#define expect_true(expr) expect ((expr) != 0, 1)
		102
		103	/*****************************************************************************/
		104
		105	typedef SV SV8; /* byte-sv, used for argument-checking */
		106	typedef int aio_rfd; /* read file desriptor */
		107	typedef int aio_wfd; /* write file descriptor */
		108
		109	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		110
		111	#define EIO_REQ_MEMBERS \
		112	SV *callback; \
		113	SV *sv1, *sv2; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/eio.h"
		120
		121	#ifndef POSIX_FADV_NORMAL
		122	# define POSIX_FADV_NORMAL 0
		123	# define NO_FADVISE 1
		124	#endif
		125
		126	#ifndef POSIX_FADV_SEQUENTIAL
		127	# define POSIX_FADV_SEQUENTIAL 0
		128	#endif
		129
		130	#ifndef POSIX_FADV_RANDOM
		131	# define POSIX_FADV_RANDOM 0
		132	#endif
		133
		134	#ifndef POSIX_FADV_NOREUSE
		135	# define POSIX_FADV_NOREUSE 0
		136	#endif
		137
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141
		142	#ifndef POSIX_FADV_DONTNEED
		143	# define POSIX_FADV_DONTNEED 0
		144	#endif
		145
		146	#ifndef ST_NODEV
		147	# define ST_NODEV 0
		148	#endif
		149
		150	#ifndef ST_NOEXEC
		151	# define ST_NOEXEC 0
		152	#endif
		153
		154	#ifndef ST_SYNCHRONOUS
		155	# define ST_SYNCHRONOUS 0
		156	#endif
		157
		158	#ifndef ST_MANDLOCK
		159	# define ST_MANDLOCK 0
		160	#endif
		161
		162	#ifndef ST_WRITE
		163	# define ST_WRITE 0
		164	#endif
		165
		166	#ifndef ST_APPEND
		167	# define ST_APPEND 0
		168	#endif
		169
		170	#ifndef ST_IMMUTABLE
		171	# define ST_IMMUTABLE 0
		172	#endif
		173
		174	#ifndef ST_NOATIME
		175	# define ST_NOATIME 0
		176	#endif
		177
		178	#ifndef ST_NODIRATIME
		179	# define ST_NODIRATIME 0
		180	#endif
		181
		182	#ifndef ST_RELATIME
		183	# define ST_RELATIME 0
		184	#endif
		185
		186	static int req_invoke (eio_req *req);
		187	#define EIO_FINISH(req) req_invoke (req)
		188	static void req_destroy (eio_req *grp);
		189	#define EIO_DESTROY(req) req_destroy (req)
25		190
26	enum {	191	enum {
27	REQ_QUIT,	192	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
28	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
31	REQ_FSYNC, REQ_FDATASYNC,
32	};	193	};
33		194
34	typedef struct aio_cb {	195	#include "libeio/eio.c"
35	struct aio_cb *volatile next;
36		196
37	int type;
38
39	int fd;
40	off_t offset;
41	size_t length;
42	ssize_t result;
43	mode_t mode; /* open */
44	int errorno;
45	SV *data, *callback;
46	void *dataptr;
47	STRLEN dataoffset;
48
49	Stat_t *statdata;
50	} aio_cb;
51
52	typedef aio_cb *aio_req;	197	typedef eio_req *aio_req;
		198	typedef eio_req *aio_req_ornot;
53		199
54	static int started;	200	static SV *on_next_submit;
55	static int nreqs;	201	static int next_pri = EIO_PRI_DEFAULT;
56	static int max_outstanding = 1<<30;	202	static int max_outstanding;
57	static int respipe [2];
58		203
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static s_epipe respipe;
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		205
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	206	static void req_destroy (aio_req req);
64	static volatile aio_req ress, rese; /* queue start, queue end */	207	static void req_cancel (aio_req req);
		208
		209	static void want_poll (void)
		210	{
		211	/* write a dummy byte to the pipe so fh becomes ready */
		212	s_epipe_signal (&respipe);
		213	}
		214
		215	static void done_poll (void)
		216	{
		217	/* read any signals sent by the worker threads */
		218	s_epipe_drain (&respipe);
		219	}
		220
		221	/* must be called at most once */
		222	static SV *req_sv (aio_req req, HV *stash)
		223	{
		224	if (!req->self)
		225	{
		226	req->self = (SV *)newHV ();
		227	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		228	}
		229
		230	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		231	}
		232
		233	static aio_req SvAIO_REQ (SV *sv)
		234	{
		235	MAGIC *mg;
		236
		237	if (!SvROK (sv)
		238	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		239	&& SvSTASH (SvRV (sv)) != aio_req_stash
		240	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		241	croak ("object of class IO::AIO::REQ expected");
		242
		243	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		244
		245	return mg ? (aio_req)mg->mg_ptr : 0;
		246	}
		247
		248	static void aio_grp_feed (aio_req grp)
		249	{
		250	if (grp->sv2 && SvOK (grp->sv2))
		251	{
		252	dSP;
		253
		254	ENTER;
		255	SAVETMPS;
		256	PUSHMARK (SP);
		257	XPUSHs (req_sv (grp, aio_grp_stash));
		258	PUTBACK;
		259	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		260	SPAGAIN;
		261	FREETMPS;
		262	LEAVE;
		263	}
		264	}
		265
		266	static void req_submit (eio_req *req)
		267	{
		268	eio_submit (req);
		269
		270	if (expect_false (on_next_submit))
		271	{
		272	dSP;
		273	SV *cb = sv_2mortal (on_next_submit);
		274
		275	on_next_submit = 0;
		276
		277	PUSHMARK (SP);
		278	PUTBACK;
		279	call_sv (cb, G_DISCARD | G_EVAL);
		280	}
		281	}
		282
		283	static int req_invoke (eio_req *req)
		284	{
		285	dSP;
		286
		287	if (req->flags & FLAG_SV2_RO_OFF)
		288	SvREADONLY_off (req->sv2);
		289
		290	if (!EIO_CANCELLED (req) && req->callback)
		291	{
		292	ENTER;
		293	SAVETMPS;
		294	PUSHMARK (SP);
		295	EXTEND (SP, 1);
		296
		297	switch (req->type)
		298	{
		299	case EIO_READDIR:
		300	{
		301	SV *rv = &PL_sv_undef;
		302
		303	if (req->result >= 0)
		304	{
		305	int i;
		306	char *names = (char *)req->ptr2;
		307	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		308	AV *av = newAV ();
		309
		310	av_extend (av, req->result - 1);
		311
		312	for (i = 0; i < req->result; ++i)
		313	{
		314	if (req->int1 & EIO_READDIR_DENTS)
		315	{
		316	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		317
		318	if (req->int1 & EIO_READDIR_CUSTOM2)
		319	{
		320	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		321	AV *avent = newAV ();
		322
		323	av_extend (avent, 2);
		324
		325	if (!sv_type [ent->type])
		326	{
		327	sv_type [ent->type] = newSViv (ent->type);
		328	SvREADONLY_on (sv_type [ent->type]);
		329	}
		330
		331	av_store (avent, 0, namesv);
		332	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		333	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		334
		335	av_store (av, i, newRV_noinc ((SV *)avent));
		336	}
		337	else
		338	av_store (av, i, namesv);
		339
		340	++ent;
		341	}
		342	else
		343	{
		344	SV *name = newSVpv (names, 0);
		345	av_store (av, i, name);
		346	names += SvCUR (name) + 1;
		347	}
		348	}
		349
		350	rv = sv_2mortal (newRV_noinc ((SV *)av));
		351	}
		352
		353	PUSHs (rv);
		354
		355	if (req->int1 & EIO_READDIR_CUSTOM1)
		356	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		357	}
		358	break;
		359
		360	case EIO_OPEN:
		361	{
		362	/* convert fd to fh */
		363	SV *fh = &PL_sv_undef;
		364
		365	if (req->result >= 0)
		366	{
		367	GV *gv = (GV *)sv_newmortal ();
		368	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		369	char sym [64];
		370	int symlen;
		371
		372	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		373	gv_init (gv, aio_stash, sym, symlen, 0);
		374
		375	symlen = snprintf (
		376	sym,
		377	sizeof (sym),
		378	"%s&=%d",
		379	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		380	(int)req->result
		381	);
		382
		383	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		384	fh = (SV *)gv;
		385	}
		386
		387	PUSHs (fh);
		388	}
		389	break;
		390
		391	case EIO_STATVFS:
		392	case EIO_FSTATVFS:
		393	{
		394	SV *rv = &PL_sv_undef;
		395
		396	if (req->result >= 0)
		397	{
		398	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		399	HV *hv = newHV ();
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		402
		403	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		404	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		405	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		406	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		407	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		408	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		409	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		410	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		411	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		412	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		413	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		414	}
		415
		416	PUSHs (rv);
		417	}
		418
		419	break;
		420
		421	case EIO_GROUP:
		422	req->int1 = 2; /* mark group as finished */
		423
		424	if (req->sv1)
		425	{
		426	int i;
		427	AV *av = (AV *)req->sv1;
		428
		429	EXTEND (SP, AvFILL (av) + 1);
		430	for (i = 0; i <= AvFILL (av); ++i)
		431	PUSHs (*av_fetch (av, i, 0));
		432	}
		433	break;
		434
		435	case EIO_NOP:
		436	case EIO_BUSY:
		437	break;
		438
		439	case EIO_READLINK:
		440	if (req->result > 0)
		441	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		442	break;
		443
		444	case EIO_STAT:
		445	case EIO_LSTAT:
		446	case EIO_FSTAT:
		447	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		448	PL_laststatval = req->result;
		449	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		450	PUSHs (sv_2mortal (newSViv (req->result)));
		451	break;
		452
		453	case EIO_READ:
		454	{
		455	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		456	*SvEND (req->sv2) = 0;
		457	SvPOK_only (req->sv2);
		458	SvSETMAGIC (req->sv2);
		459	PUSHs (sv_2mortal (newSViv (req->result)));
		460	}
		461	break;
		462
		463	case EIO_DUP2:
		464	if (req->result > 0)
		465	req->result = 0;
		466	/* FALLTHROUGH */
		467
		468	default:
		469	PUSHs (sv_2mortal (newSViv (req->result)));
		470	break;
		471	}
		472
		473	errno = req->errorno;
		474
		475	PUTBACK;
		476	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		477	SPAGAIN;
		478
		479	FREETMPS;
		480	LEAVE;
		481
		482	PUTBACK;
		483	}
		484
		485	return !!SvTRUE (ERRSV);
		486	}
		487
		488	static void req_destroy (aio_req req)
		489	{
		490	if (req->self)
		491	{
		492	sv_unmagic (req->self, PERL_MAGIC_ext);
		493	SvREFCNT_dec (req->self);
		494	}
		495
		496	SvREFCNT_dec (req->sv1);
		497	SvREFCNT_dec (req->sv2);
		498	SvREFCNT_dec (req->callback);
		499
		500	Safefree (req);
		501	}
		502
		503	static void req_cancel_subs (aio_req grp)
		504	{
		505	aio_req sub;
		506
		507	if (grp->type != EIO_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->sv2);
		511	grp->sv2 = 0;
		512
		513	eio_grp_cancel (grp);
		514	}
65		515
66	static void	516	static void
67	poll_wait ()	517	create_respipe (void)
68	{	518	{
69	if (!nreqs)	519	if (s_epipe_renew (&respipe))
		520	croak ("IO::AIO: unable to initialize result pipe");
		521	}
		522
		523	static void poll_wait (void)
		524	{
		525	while (eio_nreqs ())
		526	{
		527	int size;
		528
		529	X_LOCK (reslock);
		530	size = res_queue.size;
		531	X_UNLOCK (reslock);
		532
		533	if (size)
70	return;	534	return;
71		535
72	fd_set rfd;	536	etp_maybe_start_thread ();
73	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);
75		537
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	538	s_epipe_wait (&respipe);
77	}
78
79	static int
80	poll_cb ()
81	{
82	dSP;
83	int count = 0;
84	aio_req req;
85
86	{
87	/* read and signals sent by the worker threads */
88	char buf [32];
89	while (read (respipe [0], buf, 32) > 0)
90	;
91	}	539	}
		540	}
92		541
		542	static int poll_cb (void)
		543	{
93	for (;;)	544	for (;;)
94	{	545	{
95	pthread_mutex_lock (&reslock);	546	int res = eio_poll ();
96		547
97	req = ress;
98
99	if (ress)	548	if (res > 0)
100	{
101	ress = ress->next;
102	if (!ress) rese = 0;
103	}
104
105	pthread_mutex_unlock (&reslock);
106
107	if (!req)
108	break;	549	croak (0);
109		550
110	nreqs--;	551	if (!max_outstanding || max_outstanding > eio_nreqs ())
		552	return res;
111		553
112	if (req->type == REQ_QUIT)	554	poll_wait ();
113	started--;
114	else
115	{
116	int errorno = errno;
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}
134
135	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137
138	if (req->type == REQ_OPEN)
139	{
140	/* convert fd to fh */
141	SV *fh;
142
143	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145	SPAGAIN;
146
147	fh = POPs;
148
149	PUSHMARK (SP);
150	XPUSHs (fh);
151	}
152
153	if (SvOK (req->callback))
154	{
155	PUTBACK;
156	call_sv (req->callback, G_VOID | G_EVAL);
157	SPAGAIN;
158	}
159
160	if (req->callback)
161	SvREFCNT_dec (req->callback);
162
163	errno = errorno;
164	count++;
165	}
166
167	Safefree (req);
168	}	555	}
169
170	return count;
171	}	556	}
172		557
173	static void *aio_proc(void *arg);	558	static void atfork_child (void)
174
175	static void
176	start_thread (void)
177	{	559	{
178	sigset_t fullsigset, oldsigset;	560	create_respipe ();
179	pthread_t tid;
180	pthread_attr_t attr;
181
182	pthread_attr_init (&attr);
183	pthread_attr_setstacksize (&attr, STACKSIZE);
184	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
185
186	sigfillset (&fullsigset);
187	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
188
189	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
190	started++;
191
192	sigprocmask (SIG_SETMASK, &oldsigset, 0);
193	}	561	}
194		562
195	static void	563	static SV *
196	send_req (aio_req req)	564	get_cb (SV *cb_sv)
197	{	565	{
198	nreqs++;	566	SvGETMAGIC (cb_sv);
199		567	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
200	pthread_mutex_lock (&reqlock);
201
202	req->next = 0;
203
204	if (reqe)
205	{
206	reqe->next = req;
207	reqe = req;
208	}
209	else
210	reqe = reqs = req;
211
212	pthread_cond_signal (&reqwait);
213	pthread_mutex_unlock (&reqlock);
214
215	while (nreqs > max_outstanding)
216	{
217	poll_wait ();
218	poll_cb ();
219	}
220	}	568	}
221		569
222	static void	570	#define dREQ \
223	end_thread (void)	571	SV *cb_cv; \
224	{
225	aio_req req;	572	aio_req req; \
226	New (0, req, 1, aio_cb);	573	int req_pri = next_pri; \
227	req->type = REQ_QUIT;	574	next_pri = EIO_PRI_DEFAULT; \
228		575	\
229	send_req (req);	576	cb_cv = get_cb (callback); \
230	}	577	\
231
232	static void
233	read_write (int dowrite, int fd, off_t offset, size_t length,
234	SV *data, STRLEN dataoffset, SV *callback)
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239
240	SvUPGRADE (data, SVt_PV);
241	SvPOK_on (data);
242
243	if (dataoffset < 0)
244	dataoffset += svlen;
245
246	if (dataoffset < 0 || dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{
251	/* write: check length and adjust. */
252	if (length < 0 || length + dataoffset > svlen)
253	length = svlen - dataoffset;
254	}
255	else
256	{
257	/* read: grow scalar as necessary */
258	svptr = SvGROW (data, length + dataoffset);
259	}
260
261	if (length < 0)
262	croak ("length must not be negative");
263
264	Newz (0, req, 1, aio_cb);	578	Newz (0, req, 1, eio_req); \
265		579	if (!req) \
266	if (!req)
267	croak ("out of memory during aio_req allocation");	580	croak ("out of memory during eio_req allocation"); \
268		581	\
269	req->type = dowrite ? REQ_WRITE : REQ_READ;
270	req->fd = fd;
271	req->offset = offset;
272	req->length = length;
273	req->data = SvREFCNT_inc (data);
274	req->dataptr = (char *)svptr + dataoffset;
275	req->callback = SvREFCNT_inc (callback);	582	req->callback = SvREFCNT_inc (cb_cv); \
		583	req->pri = req_pri
276		584
277	send_req (req);	585	#define REQ_SEND \
278	}	586	PUTBACK; \
279		587	req_submit (req); \
280	static void *	588	SPAGAIN; \
281	aio_proc (void *thr_arg)	589	\
282	{	590	if (GIMME_V != G_VOID) \
283	aio_req req;	591	XPUSHs (req_sv (req, aio_req_stash));
284	int type;
285
286	do
287	{
288	pthread_mutex_lock (&reqlock);
289
290	for (;;)
291	{
292	req = reqs;
293
294	if (reqs)
295	{
296	reqs = reqs->next;
297	if (!reqs) reqe = 0;
298	}
299
300	if (req)
301	break;
302
303	pthread_cond_wait (&reqwait, &reqlock);
304	}
305
306	pthread_mutex_unlock (&reqlock);
307
308	errno = 0; /* strictly unnecessary */
309
310	type = req->type;
311
312	switch (type)
313	{
314	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
315	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
316	#if SYS_readahead
317	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
318	#else
319	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320	#endif
321
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325
326	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
327	case REQ_CLOSE: req->result = close (req->fd); break;
328	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330	case REQ_FSYNC: req->result = fsync (req->fd); break;
331	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
332
333	case REQ_QUIT:
334	break;
335
336	default:
337	req->result = ENOSYS;
338	break;
339	}
340
341	req->errorno = errno;
342
343	pthread_mutex_lock (&reslock);
344
345	req->next = 0;
346
347	if (rese)
348	{
349	rese->next = req;
350	rese = req;
351	}
352	else
353	{
354	rese = ress = req;
355
356	/* write a dummy byte to the pipe so fh becomes ready */
357	write (respipe [1], &respipe, 1);
358	}
359
360	pthread_mutex_unlock (&reslock);
361	}
362	while (type != REQ_QUIT);
363
364	return 0;
365	}
366		592
367	MODULE = IO::AIO PACKAGE = IO::AIO	593	MODULE = IO::AIO PACKAGE = IO::AIO
368		594
369	PROTOTYPES: ENABLE	595	PROTOTYPES: ENABLE
370		596
371	BOOT:	597	BOOT:
372	{	598	{
373	if (pipe (respipe))	599	static const struct {
374	croak ("unable to initialize result pipe");	600	const char *name;
		601	IV iv;
		602	} *civ, const_iv[] = {
		603	# define const_iv(name, value) { # name, (IV) value },
		604	# define const_eio(name) { # name, (IV) EIO_ ## name },
		605	const_iv (EXDEV , EXDEV)
		606	const_iv (ENOSYS , ENOSYS)
		607	const_iv (O_RDONLY, O_RDONLY)
		608	const_iv (O_WRONLY, O_WRONLY)
		609	const_iv (O_CREAT , O_CREAT)
		610	const_iv (O_TRUNC , O_TRUNC)
		611	#ifndef _WIN32
		612	const_iv (S_IFIFO , S_IFIFO)
		613	#endif
		614	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		615	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		616	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		617	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		618	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		619	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
375		620
376	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	621	const_iv (ST_RDONLY , ST_RDONLY)
377	croak ("cannot set result pipe to nonblocking mode");	622	const_iv (ST_NOSUID , ST_NOSUID)
		623	const_iv (ST_NODEV , ST_NODEV)
		624	const_iv (ST_NOEXEC , ST_NOEXEC)
		625	const_iv (ST_SYNCHRONOUS , ST_SYNCHRONOUS)
		626	const_iv (ST_MANDLOCK , ST_MANDLOCK)
		627	const_iv (ST_WRITE , ST_WRITE)
		628	const_iv (ST_APPEND , ST_APPEND)
		629	const_iv (ST_IMMUTABLE , ST_IMMUTABLE)
		630	const_iv (ST_NOATIME , ST_NOATIME)
		631	const_iv (ST_NODIRATIME , ST_NODIRATIME)
		632	const_iv (ST_RELATIME , ST_RELATIME)
378		633
379	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	634	const_eio (MS_ASYNC)
380	croak ("cannot set result pipe to nonblocking mode");	635	const_eio (MS_INVALIDATE)
381	}	636	const_eio (MS_SYNC)
382		637
		638	const_eio (MT_MODIFY)
		639
		640	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		641	const_eio (SYNC_FILE_RANGE_WRITE)
		642	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		643
		644	const_eio (READDIR_DENTS)
		645	const_eio (READDIR_DIRS_FIRST)
		646	const_eio (READDIR_STAT_ORDER)
		647	const_eio (READDIR_FOUND_UNKNOWN)
		648
		649	const_eio (DT_UNKNOWN)
		650	const_eio (DT_FIFO)
		651	const_eio (DT_CHR)
		652	const_eio (DT_DIR)
		653	const_eio (DT_BLK)
		654	const_eio (DT_REG)
		655	const_eio (DT_LNK)
		656	const_eio (DT_SOCK)
		657	const_eio (DT_WHT)
		658	};
		659
		660	aio_stash = gv_stashpv ("IO::AIO" , 1);
		661	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		662	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		663
		664	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		665	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		666
		667	create_respipe ();
		668
		669	if (eio_init (want_poll, done_poll) < 0)
		670	croak ("IO::AIO: unable to initialise eio library");
		671
		672	/* atfork child called in fifo order, so before eio's handler */
		673	X_THREAD_ATFORK (0, 0, atfork_child);
		674	}
		675
383	void	676	void
384	min_parallel(nthreads)	677	max_poll_reqs (int nreqs)
385	int nthreads
386	PROTOTYPE: $	678	PROTOTYPE: $
387	CODE:	679	CODE:
388	while (nthreads > started)	680	eio_set_max_poll_reqs (nreqs);
389	start_thread ();
390		681
391	void	682	void
392	max_parallel(nthreads)	683	max_poll_time (double nseconds)
393	int nthreads
394	PROTOTYPE: $	684	PROTOTYPE: $
395	CODE:	685	CODE:
		686	eio_set_max_poll_time (nseconds);
		687
		688	void
		689	min_parallel (int nthreads)
		690	PROTOTYPE: $
		691	CODE:
		692	eio_set_min_parallel (nthreads);
		693
		694	void
		695	max_parallel (int nthreads)
		696	PROTOTYPE: $
		697	CODE:
		698	eio_set_max_parallel (nthreads);
		699
		700	void
		701	max_idle (int nthreads)
		702	PROTOTYPE: $
		703	CODE:
		704	eio_set_max_idle (nthreads);
		705
		706	void
		707	max_outstanding (int maxreqs)
		708	PROTOTYPE: $
		709	CODE:
		710	max_outstanding = maxreqs;
		711
		712	void
		713	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		714	PROTOTYPE: $$$;$
		715	PPCODE:
396	{	716	{
397	int cur = started;	717	dREQ;
398	while (cur > nthreads)	718
399	{	719	req->type = EIO_OPEN;
400	end_thread ();	720	req->sv1 = newSVsv (pathname);
		721	req->ptr1 = SvPVbyte_nolen (req->sv1);
		722	req->int1 = flags;
		723	req->int2 = mode;
		724
		725	REQ_SEND;
		726	}
		727
		728	void
		729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		730	PROTOTYPE: $;$
		731	ALIAS:
		732	aio_fsync = EIO_FSYNC
		733	aio_fdatasync = EIO_FDATASYNC
		734	PPCODE:
		735	{
		736	int fd = s_fileno_croak (fh, 0);
		737	dREQ;
		738
		739	req->type = ix;
		740	req->sv1 = newSVsv (fh);
		741	req->int1 = fd;
		742
		743	REQ_SEND (req);
		744	}
		745
		746	void
		747	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		748	PROTOTYPE: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
		794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		795	ALIAS:
		796	aio_read = EIO_READ
		797	aio_write = EIO_WRITE
		798	PROTOTYPE: $$$$$;$
		799	PPCODE:
		800	{
		801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		803	char *svptr = SvPVbyte (data, svlen);
		804	UV len = SvUV (length);
		805
		806	if (dataoffset < 0)
		807	dataoffset += svlen;
		808
		809	if (dataoffset < 0 || dataoffset > svlen)
		810	croak ("dataoffset outside of data scalar");
		811
		812	if (ix == EIO_WRITE)
		813	{
		814	/* write: check length and adjust. */
		815	if (!SvOK (length) || len + dataoffset > svlen)
		816	len = svlen - dataoffset;
		817	}
		818	else
		819	{
		820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
		822	svptr = SvGROW (data, len + dataoffset + 1);
		823	}
		824
		825	{
		826	dREQ;
		827
		828	req->type = ix;
		829	req->sv1 = newSVsv (fh);
		830	req->int1 = fd;
		831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		832	req->size = len;
		833	req->sv2 = SvREFCNT_inc (data);
		834	req->ptr2 = (char *)svptr + dataoffset;
		835	req->stroffset = dataoffset;
		836
		837	if (!SvREADONLY (data))
401	cur--;	838	{
		839	SvREADONLY_on (data);
		840	req->flags |= FLAG_SV2_RO_OFF;
402	}	841	}
403		842
404	while (started > nthreads)	843	REQ_SEND;
		844	}
		845	}
		846
		847	void
		848	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $$;$
		850	PPCODE:
		851	{
		852	SV *data;
		853	dREQ;
		854
		855	req->type = EIO_READLINK;
		856	req->sv1 = newSVsv (path);
		857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858
		859	REQ_SEND;
		860	}
		861
		862	void
		863	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		864	PROTOTYPE: $$$$;$
		865	PPCODE:
		866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
		869	dREQ;
		870
		871	req->type = EIO_SENDFILE;
		872	req->sv1 = newSVsv (out_fh);
		873	req->int1 = ofd;
		874	req->sv2 = newSVsv (in_fh);
		875	req->int2 = ifd;
		876	req->offs = in_offset;
		877	req->size = length;
		878
		879	REQ_SEND;
		880	}
		881
		882	void
		883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		884	PROTOTYPE: $$$;$
		885	PPCODE:
		886	{
		887	int fd = s_fileno_croak (fh, 0);
		888	dREQ;
		889
		890	req->type = EIO_READAHEAD;
		891	req->sv1 = newSVsv (fh);
		892	req->int1 = fd;
		893	req->offs = offset;
		894	req->size = length;
		895
		896	REQ_SEND;
		897	}
		898
		899	void
		900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		901	ALIAS:
		902	aio_stat = EIO_STAT
		903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
		905	PPCODE:
		906	{
		907	dREQ;
		908
		909	req->sv1 = newSVsv (fh_or_path);
		910
		911	if (SvPOK (req->sv1))
		912	{
		913	req->type = ix;
		914	req->ptr1 = SvPVbyte_nolen (req->sv1);
		915	}
		916	else
		917	{
		918	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		919	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		920	}
		921
		922	REQ_SEND;
		923	}
		924
		925	void
		926	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		927	PPCODE:
		928	{
		929	dREQ;
		930
		931	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		932	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		933	req->sv1 = newSVsv (fh_or_path);
		934
		935	if (SvPOK (req->sv1))
		936	{
		937	req->type = EIO_UTIME;
		938	req->ptr1 = SvPVbyte_nolen (req->sv1);
		939	}
		940	else
		941	{
		942	req->type = EIO_FUTIME;
		943	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		944	}
		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->sv1 = newSVsv (fh_or_path);
		956	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		957
		958	if (SvPOK (req->sv1))
		959	{
		960	req->type = EIO_TRUNCATE;
		961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962	}
		963	else
		964	{
		965	req->type = EIO_FTRUNCATE;
		966	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		967	}
		968
		969	REQ_SEND;
		970	}
		971
		972	void
		973	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_chmod = EIO_CHMOD
		976	aio_mkdir = EIO_MKDIR
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->int2 = mode;
		982	req->sv1 = newSVsv (fh_or_path);
		983
		984	if (SvPOK (req->sv1))
		985	{
		986	req->type = ix;
		987	req->ptr1 = SvPVbyte_nolen (req->sv1);
		988	}
		989	else
		990	{
		991	req->type = EIO_FCHMOD;
		992	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		993	}
		994
		995	REQ_SEND;
		996	}
		997
		998	void
		999	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1000	PPCODE:
		1001	{
		1002	dREQ;
		1003
		1004	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1005	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1006	req->sv1 = newSVsv (fh_or_path);
		1007
		1008	if (SvPOK (req->sv1))
		1009	{
		1010	req->type = EIO_CHOWN;
		1011	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1012	}
		1013	else
		1014	{
		1015	req->type = EIO_FCHOWN;
		1016	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1017	}
		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_READDIR;
		1029	req->sv1 = newSVsv (pathname);
		1030	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1031	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1032
		1033	if (flags & EIO_READDIR_DENTS)
		1034	req->int1 |= EIO_READDIR_CUSTOM2;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	void
		1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1041	ALIAS:
		1042	aio_unlink = EIO_UNLINK
		1043	aio_rmdir = EIO_RMDIR
		1044	aio_readdir = EIO_READDIR
		1045	PPCODE:
		1046	{
		1047	dREQ;
		1048
		1049	req->type = ix;
		1050	req->sv1 = newSVsv (pathname);
		1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1052
		1053	REQ_SEND;
		1054	}
		1055
		1056	void
		1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1058	ALIAS:
		1059	aio_link = EIO_LINK
		1060	aio_symlink = EIO_SYMLINK
		1061	aio_rename = EIO_RENAME
		1062	PPCODE:
		1063	{
		1064	dREQ;
		1065
		1066	req->type = ix;
		1067	req->sv1 = newSVsv (oldpath);
		1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1069	req->sv2 = newSVsv (newpath);
		1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1071
		1072	REQ_SEND;
		1073	}
		1074
		1075	void
		1076	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->type = EIO_MKNOD;
		1082	req->sv1 = newSVsv (pathname);
		1083	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1084	req->int2 = (mode_t)mode;
		1085	req->offs = dev;
		1086
		1087	REQ_SEND;
		1088	}
		1089
		1090	void
		1091	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1092	ALIAS:
		1093	aio_mtouch = EIO_MTOUCH
		1094	aio_msync = EIO_MSYNC
		1095	PROTOTYPE: $$$$;$
		1096	PPCODE:
		1097	{
		1098	STRLEN svlen;
		1099	UV len = SvUV (length);
		1100	char *svptr = SvPVbyte (data, svlen);
		1101
		1102	if (offset < 0)
		1103	offset += svlen;
		1104
		1105	if (offset < 0 || offset > svlen)
		1106	croak ("offset outside of scalar");
		1107
		1108	if (!SvOK (length) || len + offset > svlen)
		1109	len = svlen - offset;
		1110
		1111	{
		1112	dREQ;
		1113
		1114	req->type = ix;
		1115	req->size = len;
		1116	req->sv2 = SvREFCNT_inc (data);
		1117	req->ptr2 = (char *)svptr + offset;
		1118	req->int1 = flags;
		1119
		1120	REQ_SEND;
		1121	}
		1122	}
		1123
		1124	void
		1125	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_BUSY;
		1131	req->nv1 = delay < 0. ? 0. : delay;
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
		1137	aio_group (SV *callback=&PL_sv_undef)
		1138	PROTOTYPE: ;$
		1139	PPCODE:
		1140	{
		1141	dREQ;
		1142
		1143	req->type = EIO_GROUP;
		1144
		1145	req_submit (req);
		1146	XPUSHs (req_sv (req, aio_grp_stash));
		1147	}
		1148
		1149	void
		1150	aio_nop (SV *callback=&PL_sv_undef)
		1151	ALIAS:
		1152	aio_nop = EIO_NOP
		1153	aio_sync = EIO_SYNC
		1154	PPCODE:
		1155	{
		1156	dREQ;
		1157
		1158	req->type = ix;
		1159
		1160	REQ_SEND;
		1161	}
		1162
		1163	int
		1164	aioreq_pri (int pri = 0)
		1165	PROTOTYPE: ;$
		1166	CODE:
		1167	RETVAL = next_pri;
		1168	if (items > 0)
		1169	{
		1170	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1171	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1172	next_pri = pri;
		1173	}
		1174	OUTPUT:
		1175	RETVAL
		1176
		1177	void
		1178	aioreq_nice (int nice = 0)
		1179	CODE:
		1180	nice = next_pri - nice;
		1181	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1182	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1183	next_pri = nice;
		1184
		1185	void
		1186	flush ()
		1187	PROTOTYPE:
		1188	CODE:
		1189	while (eio_nreqs ())
405	{	1190	{
406	poll_wait ();	1191	poll_wait ();
407	poll_cb ();	1192	poll_cb ();
408	}	1193	}
409	}
410		1194
411	int	1195	int
412	max_outstanding(nreqs)
413	int nreqs
414	PROTOTYPE: $
415	CODE:
416	RETVAL = max_outstanding;
417	max_outstanding = nreqs;
418
419	void
420	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
421	SV * pathname
422	int flags
423	int mode
424	SV * callback
425	PROTOTYPE: $$$;$
426	CODE:
427	{
428	aio_req req;
429
430	Newz (0, req, 1, aio_cb);
431
432	if (!req)
433	croak ("out of memory during aio_req allocation");
434
435	req->type = REQ_OPEN;
436	req->data = newSVsv (pathname);
437	req->dataptr = SvPV_nolen (req->data);
438	req->fd = flags;
439	req->mode = mode;
440	req->callback = SvREFCNT_inc (callback);
441
442	send_req (req);
443	}
444
445	void
446	aio_close(fh,callback=&PL_sv_undef)
447	InputStream fh
448	SV * callback
449	PROTOTYPE: $;$
450	ALIAS:
451	aio_close = REQ_CLOSE
452	aio_fsync = REQ_FSYNC
453	aio_fdatasync = REQ_FDATASYNC
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = ix;
464	req->fd = PerlIO_fileno (fh);
465	req->callback = SvREFCNT_inc (callback);
466
467	send_req (req);
468	}
469
470	void
471	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
472	InputStream fh
473	UV offset
474	IV length
475	SV * data
476	IV dataoffset
477	SV * callback
478	PROTOTYPE: $$$$$;$
479	CODE:
480	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
481
482	void
483	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
484	OutputStream fh
485	UV offset
486	IV length
487	SV * data
488	IV dataoffset
489	SV * callback
490	PROTOTYPE: $$$$$;$
491	CODE:
492	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
493
494	void
495	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
496	InputStream fh
497	UV offset
498	IV length
499	SV * callback
500	PROTOTYPE: $$$;$
501	CODE:
502	{
503	aio_req req;
504
505	if (length < 0)
506	croak ("length must not be negative");
507
508	Newz (0, req, 1, aio_cb);
509
510	if (!req)
511	croak ("out of memory during aio_req allocation");
512
513	req->type = REQ_READAHEAD;
514	req->fd = PerlIO_fileno (fh);
515	req->offset = offset;
516	req->length = length;
517	req->callback = SvREFCNT_inc (callback);
518
519	send_req (req);
520	}
521
522	void
523	aio_stat(fh_or_path,callback=&PL_sv_undef)
524	SV * fh_or_path
525	SV * callback
526	ALIAS:
527	aio_stat = REQ_STAT
528	aio_lstat = REQ_LSTAT
529	CODE:
530	{
531	aio_req req;
532
533	Newz (0, req, 1, aio_cb);
534
535	if (!req)
536	croak ("out of memory during aio_req allocation");
537
538	New (0, req->statdata, 1, Stat_t);
539
540	if (!req->statdata)
541	croak ("out of memory during aio_req->statdata allocation");
542
543	if (SvPOK (fh_or_path))
544	{
545	req->type = ix;
546	req->data = newSVsv (fh_or_path);
547	req->dataptr = SvPV_nolen (req->data);
548	}
549	else
550	{
551	req->type = REQ_FSTAT;
552	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
553	}
554
555	req->callback = SvREFCNT_inc (callback);
556
557	send_req (req);
558	}
559
560	void
561	aio_unlink(pathname,callback=&PL_sv_undef)
562	SV * pathname
563	SV * callback
564	CODE:
565	{
566	aio_req req;
567
568	Newz (0, req, 1, aio_cb);
569
570	if (!req)
571	croak ("out of memory during aio_req allocation");
572
573	req->type = REQ_UNLINK;
574	req->data = newSVsv (pathname);
575	req->dataptr = SvPV_nolen (req->data);
576	req->callback = SvREFCNT_inc (callback);
577
578	send_req (req);
579	}
580
581	void
582	flush()
583	PROTOTYPE:
584	CODE:
585	while (nreqs)
586	{
587	poll_wait ();
588	poll_cb ();
589	}
590
591	void
592	poll()	1196	poll()
593	PROTOTYPE:	1197	PROTOTYPE:
594	CODE:	1198	CODE:
595	if (nreqs)
596	{
597	poll_wait ();	1199	poll_wait ();
598	poll_cb ();	1200	RETVAL = poll_cb ();
599	}	1201	OUTPUT:
		1202	RETVAL
600		1203
601	int	1204	int
602	poll_fileno()	1205	poll_fileno()
603	PROTOTYPE:	1206	PROTOTYPE:
604	CODE:	1207	CODE:
605	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
606	OUTPUT:	1209	OUTPUT:
607	RETVAL	1210	RETVAL
608		1211
609	int	1212	int
610	poll_cb(...)	1213	poll_cb(...)
…		…
616		1219
617	void	1220	void
618	poll_wait()	1221	poll_wait()
619	PROTOTYPE:	1222	PROTOTYPE:
620	CODE:	1223	CODE:
621	if (nreqs)
622	poll_wait ();	1224	poll_wait ();
623		1225
624	int	1226	int
625	nreqs()	1227	nreqs()
626	PROTOTYPE:	1228	PROTOTYPE:
627	CODE:	1229	CODE:
628	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
629	OUTPUT:	1231	OUTPUT:
630	RETVAL	1232	RETVAL
631		1233
		1234	int
		1235	nready()
		1236	PROTOTYPE:
		1237	CODE:
		1238	RETVAL = eio_nready ();
		1239	OUTPUT:
		1240	RETVAL
		1241
		1242	int
		1243	npending()
		1244	PROTOTYPE:
		1245	CODE:
		1246	RETVAL = eio_npending ();
		1247	OUTPUT:
		1248	RETVAL
		1249
		1250	int
		1251	nthreads()
		1252	PROTOTYPE:
		1253	CODE:
		1254	RETVAL = eio_nthreads ();
		1255	OUTPUT:
		1256	RETVAL
		1257
		1258	int
		1259	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1260	PROTOTYPE: $$$$
		1261	CODE:
		1262	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1263	RETVAL = posix_fadvise (fh, offset, length, advice);
		1264	#else
		1265	RETVAL = errno = ENOSYS;
		1266	#endif
		1267	OUTPUT:
		1268	RETVAL
		1269
		1270	ssize_t
		1271	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1272	PROTOTYPE: $$$$
		1273	CODE:
		1274	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	void _on_next_submit (SV *cb)
		1279	CODE:
		1280	SvREFCNT_dec (on_next_submit);
		1281	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1282
		1283	PROTOTYPES: DISABLE
		1284
		1285	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1286
		1287	void
		1288	cancel (aio_req_ornot req)
		1289	CODE:
		1290	eio_cancel (req);
		1291
		1292	void
		1293	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1294	PPCODE:
		1295	{
		1296	if (GIMME_V != G_VOID)
		1297	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1298
		1299	if (items > 1)
		1300	{
		1301	SV *cb_cv =get_cb (callback);
		1302
		1303	SvREFCNT_dec (req->callback);
		1304	req->callback = SvREFCNT_inc (cb_cv);
		1305	}
		1306	}
		1307
		1308	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1309
		1310	void
		1311	add (aio_req grp, ...)
		1312	PPCODE:
		1313	{
		1314	int i;
		1315
		1316	if (grp->int1 == 2)
		1317	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1318
		1319	for (i = 1; i < items; ++i )
		1320	{
		1321	aio_req req;
		1322
		1323	if (GIMME_V != G_VOID)
		1324	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1325
		1326	req = SvAIO_REQ (ST (i));
		1327
		1328	if (req)
		1329	eio_grp_add (grp, req);
		1330	}
		1331	}
		1332
		1333	void
		1334	cancel_subs (aio_req_ornot req)
		1335	CODE:
		1336	req_cancel_subs (req);
		1337
		1338	void
		1339	result (aio_req grp, ...)
		1340	CODE:
		1341	{
		1342	int i;
		1343	AV *av;
		1344
		1345	grp->errorno = errno;
		1346
		1347	av = newAV ();
		1348	av_extend (av, items - 1);
		1349
		1350	for (i = 1; i < items; ++i )
		1351	av_push (av, newSVsv (ST (i)));
		1352
		1353	SvREFCNT_dec (grp->sv1);
		1354	grp->sv1 = (SV *)av;
		1355	}
		1356
		1357	void
		1358	errno (aio_req grp, int errorno = errno)
		1359	CODE:
		1360	grp->errorno = errorno;
		1361
		1362	void
		1363	limit (aio_req grp, int limit)
		1364	CODE:
		1365	eio_grp_limit (grp, limit);
		1366
		1367	void
		1368	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1369	CODE:
		1370	{
		1371	SvREFCNT_dec (grp->sv2);
		1372	grp->sv2 = newSVsv (callback);
		1373	grp->feed = aio_grp_feed;
		1374
		1375	if (grp->int2 <= 0)
		1376	grp->int2 = 2;
		1377
		1378	eio_grp_limit (grp, grp->int2);
		1379	}
		1380

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