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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.33 by root, Mon Aug 22 23:21:57 2005 UTC vs.
Revision 1.161 by root, Sun Jan 10 20:28:43 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/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	#include "schmorp.h"
9		10
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14		16	#include <sys/statvfs.h>
15	#include <unistd.h>	17	#include <limits.h>
16	#include <fcntl.h>	18	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	19	#include <sched.h>
19		20
20	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK
21	# if __linux
22	# include <sys/sendfile.h>
23	# elif __freebsd
24	# include <sys/socket.h>
25	# include <sys/uio.h>	22	# include <sys/mman.h>
26	# elif __hpux
27	# include <sys/socket.h>
28	# endif	23	#endif
29	#endif
30		24
31	#if __ia64	25	/* perl namespace pollution */
32	# define STACKSIZE 65536	26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
33	#else	66	#else
34	# define STACKSIZE 4096	67
		68	# include <sys/time.h>
		69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
35	#endif	75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	static int req_invoke (eio_req *req);
		184	#define EIO_FINISH(req) req_invoke (req)
		185	static void req_destroy (eio_req *grp);
		186	#define EIO_DESTROY(req) req_destroy (req)
36		187
37	enum {	188	enum {
38	REQ_QUIT,	189	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	190	};
47		191
48	typedef struct aio_cb {	192	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		193
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	194	typedef eio_req *aio_req;
		195	typedef eio_req *aio_req_ornot;
68		196
69	static int started, wanted;	197	static SV *on_next_submit;
70	static volatile int nreqs;	198	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	199	static int max_outstanding;
72	static int respipe [2];
73		200
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	201	static s_epipe respipe;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		202
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	203	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	204	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		205
		206	static void want_poll (void)
		207	{
		208	/* write a dummy byte to the pipe so fh becomes ready */
		209	s_epipe_signal (&respipe);
		210	}
		211
		212	static void done_poll (void)
		213	{
		214	/* read any signals sent by the worker threads */
		215	s_epipe_drain (&respipe);
		216	}
		217
		218	/* must be called at most once */
		219	static SV *req_sv (aio_req req, HV *stash)
		220	{
		221	if (!req->self)
		222	{
		223	req->self = (SV *)newHV ();
		224	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		225	}
		226
		227	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		228	}
		229
		230	static aio_req SvAIO_REQ (SV *sv)
		231	{
		232	MAGIC *mg;
		233
		234	if (!SvROK (sv)
		235	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		236	&& SvSTASH (SvRV (sv)) != aio_req_stash
		237	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		238	croak ("object of class IO::AIO::REQ expected");
		239
		240	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		241
		242	return mg ? (aio_req)mg->mg_ptr : 0;
		243	}
		244
		245	static void aio_grp_feed (aio_req grp)
		246	{
		247	if (grp->sv2 && SvOK (grp->sv2))
		248	{
		249	dSP;
		250
		251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	XPUSHs (req_sv (grp, aio_grp_stash));
		255	PUTBACK;
		256	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		257	SPAGAIN;
		258	FREETMPS;
		259	LEAVE;
		260	}
		261	}
		262
		263	static void req_submit (eio_req *req)
		264	{
		265	eio_submit (req);
		266
		267	if (expect_false (on_next_submit))
		268	{
		269	dSP;
		270	SV *cb = sv_2mortal (on_next_submit);
		271
		272	on_next_submit = 0;
		273
		274	PUSHMARK (SP);
		275	PUTBACK;
		276	call_sv (cb, G_DISCARD | G_EVAL);
		277	}
		278	}
		279
		280	static int req_invoke (eio_req *req)
		281	{
		282	dSP;
		283
		284	if (req->flags & FLAG_SV2_RO_OFF)
		285	SvREADONLY_off (req->sv2);
		286
		287	if (!EIO_CANCELLED (req) && req->callback)
		288	{
		289	ENTER;
		290	SAVETMPS;
		291	PUSHMARK (SP);
		292	EXTEND (SP, 1);
		293
		294	switch (req->type)
		295	{
		296	case EIO_READDIR:
		297	{
		298	SV *rv = &PL_sv_undef;
		299
		300	if (req->result >= 0)
		301	{
		302	int i;
		303	char *names = (char *)req->ptr2;
		304	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		305	AV *av = newAV ();
		306
		307	av_extend (av, req->result - 1);
		308
		309	for (i = 0; i < req->result; ++i)
		310	{
		311	if (req->int1 & EIO_READDIR_DENTS)
		312	{
		313	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		314
		315	if (req->int1 & EIO_READDIR_CUSTOM2)
		316	{
		317	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		318	AV *avent = newAV ();
		319
		320	av_extend (avent, 2);
		321
		322	if (!sv_type [ent->type])
		323	{
		324	sv_type [ent->type] = newSViv (ent->type);
		325	SvREADONLY_on (sv_type [ent->type]);
		326	}
		327
		328	av_store (avent, 0, namesv);
		329	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		330	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		331
		332	av_store (av, i, newRV_noinc ((SV *)avent));
		333	}
		334	else
		335	av_store (av, i, namesv);
		336
		337	++ent;
		338	}
		339	else
		340	{
		341	SV *name = newSVpv (names, 0);
		342	av_store (av, i, name);
		343	names += SvCUR (name) + 1;
		344	}
		345	}
		346
		347	rv = sv_2mortal (newRV_noinc ((SV *)av));
		348	}
		349
		350	PUSHs (rv);
		351
		352	if (req->int1 & EIO_READDIR_CUSTOM1)
		353	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		354	}
		355	break;
		356
		357	case EIO_OPEN:
		358	{
		359	/* convert fd to fh */
		360	SV *fh = &PL_sv_undef;
		361
		362	if (req->result >= 0)
		363	{
		364	GV *gv = (GV *)sv_newmortal ();
		365	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		366	char sym [64];
		367	int symlen;
		368
		369	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		370	gv_init (gv, aio_stash, sym, symlen, 0);
		371
		372	symlen = snprintf (
		373	sym,
		374	sizeof (sym),
		375	"%s&=%d",
		376	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		377	(int)req->result
		378	);
		379
		380	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		381	fh = (SV *)gv;
		382	}
		383
		384	PUSHs (fh);
		385	}
		386	break;
		387
		388	case EIO_STATVFS:
		389	case EIO_FSTATVFS:
		390	{
		391	SV *rv = &PL_sv_undef;
		392
		393	if (req->result >= 0)
		394	{
		395	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		396	HV *hv = newHV ();
		397
		398	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		399
		400	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		401	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		402	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		403	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		404	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		405	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		406	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		407	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		408	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		409	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		410	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		411	}
		412
		413	PUSHs (rv);
		414	}
		415
		416	break;
		417
		418	case EIO_GROUP:
		419	req->int1 = 2; /* mark group as finished */
		420
		421	if (req->sv1)
		422	{
		423	int i;
		424	AV *av = (AV *)req->sv1;
		425
		426	EXTEND (SP, AvFILL (av) + 1);
		427	for (i = 0; i <= AvFILL (av); ++i)
		428	PUSHs (*av_fetch (av, i, 0));
		429	}
		430	break;
		431
		432	case EIO_NOP:
		433	case EIO_BUSY:
		434	break;
		435
		436	case EIO_READLINK:
		437	if (req->result > 0)
		438	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		439	break;
		440
		441	case EIO_STAT:
		442	case EIO_LSTAT:
		443	case EIO_FSTAT:
		444	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		445	PL_laststatval = req->result;
		446	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		447	PUSHs (sv_2mortal (newSViv (req->result)));
		448	break;
		449
		450	case EIO_READ:
		451	{
		452	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		453	*SvEND (req->sv2) = 0;
		454	SvPOK_only (req->sv2);
		455	SvSETMAGIC (req->sv2);
		456	PUSHs (sv_2mortal (newSViv (req->result)));
		457	}
		458	break;
		459
		460	case EIO_DUP2:
		461	if (req->result > 0)
		462	req->result = 0;
		463	/* FALLTHROUGH */
		464
		465	default:
		466	PUSHs (sv_2mortal (newSViv (req->result)));
		467	break;
		468	}
		469
		470	errno = req->errorno;
		471
		472	PUTBACK;
		473	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		474	SPAGAIN;
		475
		476	FREETMPS;
		477	LEAVE;
		478
		479	PUTBACK;
		480	}
		481
		482	return !!SvTRUE (ERRSV);
		483	}
		484
		485	static void req_destroy (aio_req req)
		486	{
86	if (req->fh)	487	if (req->self)
		488	{
		489	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	490	SvREFCNT_dec (req->self);
		491	}
88		492
89	if (req->fh2)	493	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	494	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	495	SvREFCNT_dec (req->callback);
97		496
98	Safefree (req);	497	Safefree (req);
99	}	498	}
100		499
		500	static void req_cancel_subs (aio_req grp)
		501	{
		502	aio_req sub;
		503
		504	if (grp->type != EIO_GROUP)
		505	return;
		506
		507	SvREFCNT_dec (grp->sv2);
		508	grp->sv2 = 0;
		509
		510	eio_grp_cancel (grp);
		511	}
		512
101	static void	513	static void
102	poll_wait ()	514	create_respipe (void)
103	{	515	{
104	if (nreqs && !ress)	516	if (s_epipe_renew (&respipe))
		517	croak ("IO::AIO: unable to initialize result pipe");
		518	}
		519
		520	static void poll_wait (void)
		521	{
		522	while (eio_nreqs ())
105	{	523	{
106	fd_set rfd;	524	int size;
107	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);
109		525
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	526	X_LOCK (reslock);
		527	size = res_queue.size;
		528	X_UNLOCK (reslock);
		529
		530	if (size)
		531	return;
		532
		533	etp_maybe_start_thread ();
		534
		535	s_epipe_wait (&respipe);
111	}	536	}
112	}	537	}
113		538
114	static int	539	static int poll_cb (void)
115	poll_cb ()
116	{	540	{
117	dSP;
118	int count = 0;
119	int do_croak = 0;
120	aio_req req;
121
122	for (;;)	541	for (;;)
123	{	542	{
124	pthread_mutex_lock (&reslock);	543	int res = eio_poll ();
125	req = ress;
126		544
127	if (req)	545	if (res > 0)
128	{
129	ress = req->next;
130
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);	546	croak (0);
198	}
199	}
200		547
201	LEAVE;	548	if (!max_outstanding || max_outstanding > eio_nreqs ())
		549	return res;
202		550
203	errno = errorno;	551	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	552	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	553	}
329		554
330	static void atfork_child (void)	555	static void atfork_child (void)
331	{	556	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();	557	create_respipe ();
357
358	atfork_parent ();
359	}	558	}
360		559
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&iolock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&iolock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	/* maybe on others, too, as usual, the manpage leaves you guessing */
456	res = sbytes;
457	}
458
459	#elif __hpux
460	res = sendfile (ofd, ifd, offset, count, 0, 0);
461
462	#else
463	res = -1;
464	errno = ENOSYS;
465	#endif
466
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
468	{
469	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);
471	res = 0;
472
473	for (;;)
474	{
475	ssize_t cnt;
476
477	cnt = pread (ifd, buf, 4096, offset);
478
479	if (cnt <= 0)
480	{
481	if (cnt && !res) res = -1;
482	break;
483	}
484
485	cnt = write (ofd, buf, cnt);
486
487	if (cnt <= 0)
488	{
489	if (cnt && !res) res = -1;
490	break;
491	}
492
493	offset += cnt;
494	res += cnt;
495	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}
503
504	return res;
505	}
506
507	/*****************************************************************************/
508
509	static void *	560	static SV *
510	aio_proc (void *thr_arg)	561	get_cb (SV *cb_sv)
511	{	562	{
512	aio_req req;	563	SvGETMAGIC (cb_sv);
513	int type;	564	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
514
515	do
516	{
517	pthread_mutex_lock (&reqlock);
518
519	for (;;)
520	{
521	req = reqs;
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528
529	if (req)
530	break;
531
532	pthread_cond_wait (&reqwait, &reqlock);
533	}
534
535	pthread_mutex_unlock (&reqlock);
536
537	errno = 0; /* strictly unnecessary */
538
539	type = req->type;
540
541	switch (type)
542	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
544	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
547	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
548
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;
561
562	case REQ_QUIT:
563	break;
564
565	default:
566	req->result = ENOSYS;
567	break;
568	}
569
570	req->errorno = errno;
571
572	pthread_mutex_lock (&reslock);
573
574	req->next = 0;
575
576	if (rese)
577	{
578	rese->next = req;
579	rese = req;
580	}
581	else
582	{
583	rese = ress = req;
584
585	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);
587	}
588
589	pthread_mutex_unlock (&reslock);
590	}
591	while (type != REQ_QUIT);
592
593	return 0;
594	}	565	}
595		566
596	#define dREQ \	567	#define dREQ \
		568	SV *cb_cv; \
597	aio_req req; \	569	aio_req req; \
		570	int req_pri = next_pri; \
		571	next_pri = EIO_PRI_DEFAULT; \
598	\	572	\
599	if (SvOK (callback) && !SvROK (callback)) \	573	cb_cv = get_cb (callback); \
600	croak ("clalback must be undef or of reference type"); \
601	\	574	\
602	Newz (0, req, 1, aio_cb); \	575	Newz (0, req, 1, eio_req); \
603	if (!req) \	576	if (!req) \
604	croak ("out of memory during aio_req allocation"); \	577	croak ("out of memory during eio_req allocation"); \
605	\	578	\
606	req->callback = newSVsv (callback);	579	req->callback = SvREFCNT_inc (cb_cv); \
607		580	req->pri = req_pri
		581
		582	#define REQ_SEND \
		583	PUTBACK; \
		584	req_submit (req); \
		585	SPAGAIN; \
		586	\
		587	if (GIMME_V != G_VOID) \
		588	XPUSHs (req_sv (req, aio_req_stash));
		589
608	MODULE = IO::AIO PACKAGE = IO::AIO	590	MODULE = IO::AIO PACKAGE = IO::AIO
609		591
610	PROTOTYPES: ENABLE	592	PROTOTYPES: ENABLE
611		593
612	BOOT:	594	BOOT:
613	{	595	{
		596	static const struct {
		597	const char *name;
		598	IV iv;
		599	} *civ, const_iv[] = {
		600	# define const_iv(name, value) { # name, (IV) value },
		601	# define const_eio(name) { # name, (IV) EIO_ ## name },
		602	const_iv (EXDEV , EXDEV)
		603	const_iv (ENOSYS , ENOSYS)
		604	const_iv (O_RDONLY, O_RDONLY)
		605	const_iv (O_WRONLY, O_WRONLY)
		606	const_iv (O_CREAT , O_CREAT)
		607	const_iv (O_TRUNC , O_TRUNC)
		608	#ifndef _WIN32
		609	const_iv (S_IFIFO , S_IFIFO)
		610	#endif
		611	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		612	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		613	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		614	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		615	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		616	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		617
		618	const_iv (ST_RDONLY , ST_RDONLY)
		619	const_iv (ST_NOSUID , ST_NOSUID)
		620	const_iv (ST_NODEV , ST_NODEV)
		621	const_iv (ST_NOEXEC , ST_NOEXEC)
		622	const_iv (ST_SYNCHRONOUS , ST_SYNCHRONOUS)
		623	const_iv (ST_MANDLOCK , ST_MANDLOCK)
		624	const_iv (ST_WRITE , ST_WRITE)
		625	const_iv (ST_APPEND , ST_APPEND)
		626	const_iv (ST_IMMUTABLE , ST_IMMUTABLE)
		627	const_iv (ST_NOATIME , ST_NOATIME)
		628	const_iv (ST_NODIRATIME , ST_NODIRATIME)
		629	const_iv (ST_RELATIME , ST_RELATIME)
		630
		631	const_iv (MCL_FUTURE , MCL_FUTURE)
		632	const_iv (MCL_CURRENT , MCL_CURRENT)
		633
		634	const_eio (MS_ASYNC)
		635	const_eio (MS_INVALIDATE)
		636	const_eio (MS_SYNC)
		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
614	create_pipe ();	667	create_respipe ();
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}
617		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
618	void	676	void
619	min_parallel(nthreads)	677	max_poll_reqs (int nreqs)
620	int nthreads
621	PROTOTYPE: $	678	PROTOTYPE: $
		679	CODE:
		680	eio_set_max_poll_reqs (nreqs);
622		681
623	void	682	void
624	max_parallel(nthreads)	683	max_poll_time (double nseconds)
625	int nthreads
626	PROTOTYPE: $	684	PROTOTYPE: $
627
628	int
629	max_outstanding(nreqs)
630	int nreqs
631	PROTOTYPE: $
632	CODE:	685	CODE:
633	RETVAL = max_outstanding;	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:
634	max_outstanding = nreqs;	710	max_outstanding = maxreqs;
635		711
636	void	712	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	713	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
638	SV * pathname
639	int flags
640	int mode
641	SV * callback
642	PROTOTYPE: $$$;$	714	PROTOTYPE: $$$;$
643	CODE:	715	PPCODE:
644	{	716	{
645	dREQ;	717	dREQ;
646		718
647	req->type = REQ_OPEN;	719	req->type = EIO_OPEN;
648	req->data = newSVsv (pathname);	720	req->sv1 = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
650	req->fd = flags;	722	req->int1 = flags;
651	req->mode = mode;	723	req->int2 = mode;
652		724
653	send_req (req);	725	REQ_SEND;
654	}	726	}
655		727
656	void	728	void
657	aio_close(fh,callback=&PL_sv_undef)	729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
658	SV * fh
659	SV * callback
660	PROTOTYPE: $;$	730	PROTOTYPE: $;$
661	ALIAS:	731	ALIAS:
662	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	732	aio_fsync = EIO_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	733	aio_fdatasync = EIO_FDATASYNC
665	CODE:	734	PPCODE:
666	{	735	{
		736	int fd = s_fileno_croak (fh, 0);
667	dREQ;	737	dREQ;
668		738
669	req->type = ix;	739	req->type = ix;
670	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	741	req->int1 = fd;
672		742
673	send_req (req);	743	REQ_SEND (req);
674	}	744	}
675		745
676	void	746	void
		747	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		748	PROTOTYPE: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
678	SV * fh
679	UV offset
680	UV length
681	SV * data
682	UV dataoffset
683	SV * callback
684	ALIAS:	795	ALIAS:
685	aio_read = REQ_READ	796	aio_read = EIO_READ
686	aio_write = REQ_WRITE	797	aio_write = EIO_WRITE
687	PROTOTYPE: $$$$$;$	798	PROTOTYPE: $$$$$;$
688	CODE:	799	PPCODE:
689	{	800	{
690	aio_req req;
691	STRLEN svlen;	801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
692	char *svptr = SvPVbyte (data, svlen);	803	char *svptr = SvPVbyte (data, svlen);
693		804	UV len = SvUV (length);
694	SvUPGRADE (data, SVt_PV);
695	SvPOK_on (data);
696		805
697	if (dataoffset < 0)	806	if (dataoffset < 0)
698	dataoffset += svlen;	807	dataoffset += svlen;
699		808
700	if (dataoffset < 0 || dataoffset > svlen)	809	if (dataoffset < 0 || dataoffset > svlen)
701	croak ("data offset outside of string");	810	croak ("dataoffset outside of data scalar");
702		811
703	if (ix == REQ_WRITE)	812	if (ix == EIO_WRITE)
704	{	813	{
705	/* write: check length and adjust. */	814	/* write: check length and adjust. */
706	if (length < 0 || length + dataoffset > svlen)	815	if (!SvOK (length) || len + dataoffset > svlen)
707	length = svlen - dataoffset;	816	len = svlen - dataoffset;
708	}	817	}
709	else	818	else
710	{	819	{
711	/* read: grow scalar as necessary */	820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
712	svptr = SvGROW (data, length + dataoffset);	822	svptr = SvGROW (data, len + dataoffset + 1);
713	}	823	}
714
715	if (length < 0)
716	croak ("length must not be negative");
717		824
718	{	825	{
719	dREQ;	826	dREQ;
720		827
721	req->type = ix;	828	req->type = ix;
722	req->fh = newSVsv (fh);	829	req->sv1 = newSVsv (fh);
723	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	830	req->int1 = fd;
724	: IoOFP (sv_2io (fh)));	831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
725	req->offset = offset;	832	req->size = len;
726	req->length = length;
727	req->data = SvREFCNT_inc (data);	833	req->sv2 = SvREFCNT_inc (data);
728	req->dataptr = (char *)svptr + dataoffset;	834	req->ptr2 = (char *)svptr + dataoffset;
		835	req->stroffset = dataoffset;
729		836
730	if (!SvREADONLY (data))	837	if (!SvREADONLY (data))
731	{	838	{
732	SvREADONLY_on (data);	839	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	840	req->flags |= FLAG_SV2_RO_OFF;
734	}	841	}
735		842
736	send_req (req);	843	REQ_SEND;
737	}	844	}
738	}	845	}
739		846
740	void	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
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	863	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
742	SV * out_fh
743	SV * in_fh
744	UV in_offset
745	UV length
746	SV * callback
747	PROTOTYPE: $$$$;$	864	PROTOTYPE: $$$$;$
748	CODE:	865	PPCODE:
749	{	866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
750	dREQ;	869	dREQ;
751		870
752	req->type = REQ_SENDFILE;	871	req->type = EIO_SENDFILE;
753	req->fh = newSVsv (out_fh);	872	req->sv1 = newSVsv (out_fh);
754	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	873	req->int1 = ofd;
755	req->fh2 = newSVsv (in_fh);	874	req->sv2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	875	req->int2 = ifd;
757	req->offset = in_offset;	876	req->offs = in_offset;
758	req->length = length;	877	req->size = length;
759		878
760	send_req (req);	879	REQ_SEND;
761	}	880	}
762		881
763	void	882	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
765	SV * fh
766	UV offset
767	IV length
768	SV * callback
769	PROTOTYPE: $$$;$	884	PROTOTYPE: $$$;$
770	CODE:	885	PPCODE:
771	{	886	{
		887	int fd = s_fileno_croak (fh, 0);
772	dREQ;	888	dREQ;
773		889
774	req->type = REQ_READAHEAD;	890	req->type = EIO_READAHEAD;
775	req->fh = newSVsv (fh);	891	req->sv1 = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	892	req->int1 = fd;
777	req->offset = offset;	893	req->offs = offset;
778	req->length = length;	894	req->size = length;
779		895
780	send_req (req);	896	REQ_SEND;
781	}	897	}
782		898
783	void	899	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
785	SV * fh_or_path
786	SV * callback
787	ALIAS:	901	ALIAS:
788	aio_stat = REQ_STAT	902	aio_stat = EIO_STAT
789	aio_lstat = REQ_LSTAT	903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
790	CODE:	905	PPCODE:
791	{	906	{
792	dREQ;	907	dREQ;
793		908
794	New (0, req->statdata, 1, Stat_t);	909	req->sv1 = newSVsv (fh_or_path);
795	if (!req->statdata)
796	{
797	free_req (req);
798	croak ("out of memory during aio_req->statdata allocation");
799	}
800		910
801	if (SvPOK (fh_or_path))	911	if (SvPOK (req->sv1))
802	{	912	{
803	req->type = ix;	913	req->type = ix;
804	req->data = newSVsv (fh_or_path);
805	req->dataptr = SvPVbyte_nolen (req->data);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
806	}	915	}
807	else	916	else
808	{	917	{
809	req->type = REQ_FSTAT;	918	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
810	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	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))
812	}	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	}
813		945
814	send_req (req);	946	REQ_SEND;
815	}	947	}
816		948
817	void	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
818	aio_unlink(pathname,callback=&PL_sv_undef)	1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
819	SV * pathname
820	SV * callback
821	ALIAS:	1041	ALIAS:
822	aio_unlink = REQ_UNLINK	1042	aio_unlink = EIO_UNLINK
823	aio_rmdir = REQ_RMDIR	1043	aio_rmdir = EIO_RMDIR
		1044	aio_readdir = EIO_READDIR
824	CODE:	1045	PPCODE:
825	{	1046	{
826	dREQ;	1047	dREQ;
827		1048
828	req->type = ix;	1049	req->type = ix;
829	req->data = newSVsv (pathname);	1050	req->sv1 = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
831
832	send_req (req);
833	}
834		1052
		1053	REQ_SEND;
		1054	}
		1055
835	void	1056	void
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
837	SV * oldpath	1058	ALIAS:
838	SV * newpath	1059	aio_link = EIO_LINK
839	SV * callback	1060	aio_symlink = EIO_SYMLINK
		1061	aio_rename = EIO_RENAME
840	CODE:	1062	PPCODE:
841	{	1063	{
842	dREQ;	1064	dREQ;
843		1065
844	req->type = REQ_SYMLINK;	1066	req->type = ix;
845	req->fh = newSVsv (oldpath);	1067	req->sv1 = newSVsv (oldpath);
846	req->data2ptr = SvPVbyte_nolen (req->fh);	1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
847	req->data = newSVsv (newpath);	1069	req->sv2 = newSVsv (newpath);
848	req->dataptr = SvPVbyte_nolen (req->data);	1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
849		1071
850	send_req (req);	1072	REQ_SEND;
851	}	1073	}
852		1074
853	void	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
854	flush()	1186	flush ()
855	PROTOTYPE:	1187	PROTOTYPE:
856	CODE:	1188	CODE:
857	while (nreqs)	1189	while (eio_nreqs ())
858	{	1190	{
859	poll_wait ();	1191	poll_wait ();
860	poll_cb ();	1192	poll_cb ();
861	}	1193	}
862		1194
863	void	1195	int
864	poll()	1196	poll()
865	PROTOTYPE:	1197	PROTOTYPE:
866	CODE:	1198	CODE:
867	if (nreqs)
868	{
869	poll_wait ();	1199	poll_wait ();
870	poll_cb ();	1200	RETVAL = poll_cb ();
871	}	1201	OUTPUT:
		1202	RETVAL
872		1203
873	int	1204	int
874	poll_fileno()	1205	poll_fileno()
875	PROTOTYPE:	1206	PROTOTYPE:
876	CODE:	1207	CODE:
877	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
878	OUTPUT:	1209	OUTPUT:
879	RETVAL	1210	RETVAL
880		1211
881	int	1212	int
882	poll_cb(...)	1213	poll_cb(...)
…		…
888		1219
889	void	1220	void
890	poll_wait()	1221	poll_wait()
891	PROTOTYPE:	1222	PROTOTYPE:
892	CODE:	1223	CODE:
893	if (nreqs)
894	poll_wait ();	1224	poll_wait ();
895		1225
896	int	1226	int
897	nreqs()	1227	nreqs()
898	PROTOTYPE:	1228	PROTOTYPE:
899	CODE:	1229	CODE:
900	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
901	OUTPUT:	1231	OUTPUT:
902	RETVAL	1232	RETVAL
903		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	int
		1279	mlockall (int flags)
		1280	PROTOTYPE: $
		1281	CODE:
		1282	#if _POSIX_MEMLOCK
		1283	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1284	extern int mallopt (int, int);
		1285	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1286	#endif
		1287	mlockall (flags);
		1288	#else
		1289	RETVAL ＝-1;
		1290	errno = ENOSYS;
		1291	#endif
		1292	OUTPUT:
		1293	RETVAL
		1294
		1295	int
		1296	munlockall ()
		1297	PROTOTYPE:
		1298	CODE:
		1299	#if _POSIX_MEMLOCK
		1300	munlockall ();
		1301	#else
		1302	RETVAL ＝-1;
		1303	errno = ENOSYS;
		1304	#endif
		1305	OUTPUT:
		1306	RETVAL
		1307
		1308	void _on_next_submit (SV *cb)
		1309	CODE:
		1310	SvREFCNT_dec (on_next_submit);
		1311	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1312
		1313	PROTOTYPES: DISABLE
		1314
		1315	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1316
		1317	void
		1318	cancel (aio_req_ornot req)
		1319	CODE:
		1320	eio_cancel (req);
		1321
		1322	void
		1323	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1324	PPCODE:
		1325	{
		1326	if (GIMME_V != G_VOID)
		1327	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1328
		1329	if (items > 1)
		1330	{
		1331	SV *cb_cv =get_cb (callback);
		1332
		1333	SvREFCNT_dec (req->callback);
		1334	req->callback = SvREFCNT_inc (cb_cv);
		1335	}
		1336	}
		1337
		1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1339
		1340	void
		1341	add (aio_req grp, ...)
		1342	PPCODE:
		1343	{
		1344	int i;
		1345
		1346	if (grp->int1 == 2)
		1347	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1348
		1349	for (i = 1; i < items; ++i )
		1350	{
		1351	aio_req req;
		1352
		1353	if (GIMME_V != G_VOID)
		1354	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1355
		1356	req = SvAIO_REQ (ST (i));
		1357
		1358	if (req)
		1359	eio_grp_add (grp, req);
		1360	}
		1361	}
		1362
		1363	void
		1364	cancel_subs (aio_req_ornot req)
		1365	CODE:
		1366	req_cancel_subs (req);
		1367
		1368	void
		1369	result (aio_req grp, ...)
		1370	CODE:
		1371	{
		1372	int i;
		1373	AV *av;
		1374
		1375	grp->errorno = errno;
		1376
		1377	av = newAV ();
		1378	av_extend (av, items - 1);
		1379
		1380	for (i = 1; i < items; ++i )
		1381	av_push (av, newSVsv (ST (i)));
		1382
		1383	SvREFCNT_dec (grp->sv1);
		1384	grp->sv1 = (SV *)av;
		1385	}
		1386
		1387	void
		1388	errno (aio_req grp, int errorno = errno)
		1389	CODE:
		1390	grp->errorno = errorno;
		1391
		1392	void
		1393	limit (aio_req grp, int limit)
		1394	CODE:
		1395	eio_grp_limit (grp, limit);
		1396
		1397	void
		1398	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1399	CODE:
		1400	{
		1401	SvREFCNT_dec (grp->sv2);
		1402	grp->sv2 = newSVsv (callback);
		1403	grp->feed = aio_grp_feed;
		1404
		1405	if (grp->int2 <= 0)
		1406	grp->int2 = 2;
		1407
		1408	eio_grp_limit (grp, grp->int2);
		1409	}
		1410

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