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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.40 by root, Sat Jun 24 16:27:02 2006 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	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
13	#include <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
15	#include <limits.h>	17	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	18	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	19	#include <sched.h>
20		20
21	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK
22	# if __linux
23	# include <sys/sendfile.h>
24	# elif __freebsd
25	# include <sys/socket.h>
26	# include <sys/uio.h>	22	# include <sys/mman.h>
27	# elif __hpux
28	# include <sys/socket.h>
29	# elif __solaris /* not yet */
30	# include <sys/sendfile.h>
31	# else
32	# error sendfile support requested but not available
33	# endif	23	#endif
34	#endif
35		24
36	/* used for struct dirent, AIX doesn't provide it */	25	/* perl namespace pollution */
37	#ifndef NAME_MAX	26	#undef VERSION
38	# define NAME_MAX 4096
39	#endif
40		27
41	#if __ia64	28	#ifdef _WIN32
42	# define STACKSIZE 65536	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
43	#else	66	#else
44	# define STACKSIZE 8192	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
45	#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)
46		187
47	enum {	188	enum {
48	REQ_QUIT,	189	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
49	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55	REQ_READDIR,
56	REQ_LINK, REQ_SYMLINK,
57	};	190	};
58		191
59	typedef struct aio_cb {	192	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		193
62	int type;
63
64	/* should receive a cleanup, with unions */
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75
76	Stat_t *statdata;
77	} aio_cb;
78
79	typedef aio_cb *aio_req;	194	typedef eio_req *aio_req;
		195	typedef eio_req *aio_req_ornot;
80		196
81	static int started, wanted;	197	static SV *on_next_submit;
82	static volatile int nreqs;	198	static int next_pri = EIO_PRI_DEFAULT;
83	static int max_outstanding = 1<<30;	199	static int max_outstanding;
84	static int respipe [2];
85		200
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	201	static s_epipe respipe;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		202
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	203	static void req_destroy (aio_req req);
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)	204	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		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	{
98	if (req->fh)	487	if (req->self)
		488	{
		489	sv_unmagic (req->self, PERL_MAGIC_ext);
99	SvREFCNT_dec (req->fh);	490	SvREFCNT_dec (req->self);
		491	}
100		492
101	if (req->fh2)	493	SvREFCNT_dec (req->sv1);
102	SvREFCNT_dec (req->fh2);	494	SvREFCNT_dec (req->sv2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	495	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112		496
113	Safefree (req);	497	Safefree (req);
114	}	498	}
115		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
116	static void	513	static void
117	poll_wait ()	514	create_respipe (void)
118	{	515	{
119	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 ())
120	{	523	{
121	fd_set rfd;	524	int size;
122	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);
124		525
125	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);
126	}	536	}
127	}	537	}
128		538
129	static int	539	static int poll_cb (void)
130	poll_cb ()
131	{	540	{
132	dSP;
133	int count = 0;
134	int do_croak = 0;
135	aio_req req;
136
137	for (;;)	541	for (;;)
138	{	542	{
139	pthread_mutex_lock (&reslock);	543	int res = eio_poll ();
140	req = ress;
141		544
142	if (req)	545	if (res > 0)
143	{
144	ress = req->next;
145
146	if (!ress)
147	{
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152
153	rese = 0;
154	}
155	}
156
157	pthread_mutex_unlock (&reslock);
158
159	if (!req)
160	break;
161
162	nreqs--;
163
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);	546	croak (0);
240	}
241	}
242		547
243	LEAVE;	548	if (!max_outstanding || max_outstanding > eio_nreqs ())
		549	return res;
244		550
245	errno = errorno;	551	poll_wait ();
246	count++;
247	}
248
249	free_req (req);
250	}	552	}
251
252	return count;
253	}
254
255	static void *aio_proc(void *arg);
256
257	static void
258	start_thread (void)
259	{
260	sigset_t fullsigset, oldsigset;
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}
276
277	static void
278	send_req (aio_req req)
279	{
280	while (started < wanted && nreqs >= started)
281	start_thread ();
282
283	nreqs++;
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}
347
348	static void create_pipe ()
349	{
350	if (pipe (respipe))
351	croak ("unable to initialize result pipe");
352
353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
354	croak ("cannot set result pipe to nonblocking mode");
355
356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
357	croak ("cannot set result pipe to nonblocking mode");
358	}
359
360	/*****************************************************************************/
361	/* work around various missing functions */
362
363	#if !HAVE_PREADWRITE
364	# define pread aio_pread
365	# define pwrite aio_pwrite
366
367	/*
368	* make our pread/pwrite safe against themselves, but not against
369	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.
371	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374	static ssize_t
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{
377	ssize_t res;
378	off_t ooffset;
379
380	pthread_mutex_lock (&preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386
387	return res;
388	}
389
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395
396	pthread_mutex_lock (&preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);
402
403	return res;
404	}
405	#endif
406
407	#if !HAVE_FDATASYNC
408	# define fdatasync fsync
409	#endif
410
411	#if !HAVE_READAHEAD
412	# define readahead aio_readahead
413
414	static ssize_t
415	readahead (int fd, off_t offset, size_t count)
416	{
417	char readahead_buf[4096];
418
419	while (count > 0)
420	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
422
423	pread (fd, readahead_buf, len, offset);
424	offset += len;
425	count -= len;
426	}
427
428	errno = 0;
429	}
430	#endif
431
432	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r
434
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{
440	struct dirent *e;
441	int errorno;
442
443	pthread_mutex_lock (&readdirlock);
444
445	e = readdir (dirp);
446	errorno = errno;
447
448	if (e)
449	{
450	*res = ent;
451	strcpy (ent->d_name, e->d_name);
452	}
453	else
454	*res = 0;
455
456	pthread_mutex_unlock (&readdirlock);
457
458	errno = errorno;
459	return e ? 0 : -1;
460	}
461	#endif
462
463	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466	{
467	ssize_t res;
468
469	if (!count)
470	return 0;
471
472	#if HAVE_SENDFILE
473	# if __linux
474	res = sendfile (ofd, ifd, &offset, count);
475
476	# elif __freebsd
477	/*
478	* Of course, the freebsd sendfile is a dire hack with no thoughts
479	* wasted on making it similar to other I/O functions.
480	*/
481	{
482	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484
485	if (res < 0 && sbytes)
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487	res = sbytes;
488	}
489
490	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492
493	# elif __solaris
494	{
495	struct sendfilevec vec;
496	size_t sbytes;
497
498	vec.sfv_fd = ifd;
499	vec.sfv_flag = 0;
500	vec.sfv_off = offset;
501	vec.sfv_len = count;
502
503	res = sendfilev (ofd, &vec, 1, &sbytes);
504
505	if (res < 0 && sbytes)
506	res = sbytes;
507	}
508
509	# endif
510	#else
511	res = -1;
512	errno = ENOSYS;
513	#endif
514
515	if (res < 0
516	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517	#if __solaris
518	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
519	#endif
520	)
521	)
522	{
523	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];
525	res = 0;
526
527	while (count)
528	{
529	ssize_t cnt;
530
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
532
533	if (cnt <= 0)
534	{
535	if (cnt && !res) res = -1;
536	break;
537	}
538
539	cnt = write (ofd, buf, cnt);
540
541	if (cnt <= 0)
542	{
543	if (cnt && !res) res = -1;
544	break;
545	}
546
547	offset += cnt;
548	res += cnt;
549	count -= cnt;
550	}
551	}
552
553	return res;
554	}
555
556	/* read a full directory */
557	static int
558	scandir_ (const char *path, void **namesp)
559	{
560	DIR *dirp = opendir (path);
561	union
562	{
563	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;
566	struct dirent *entp;
567	char *name, *names;
568	int memlen = 4096;
569	int memofs = 0;
570	int res = 0;
571	int errorno;
572
573	if (!dirp)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
671	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
672	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
673
674	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
675	case REQ_FSYNC: req->result = fsync (req->fd); break;
676	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
677
678	case REQ_QUIT:
679	break;
680
681	default:
682	req->result = ENOSYS;
683	break;
684	}
685
686	req->errorno = errno;
687
688	pthread_mutex_lock (&reslock);
689
690	req->next = 0;
691
692	if (rese)
693	{
694	rese->next = req;
695	rese = req;
696	}
697	else
698	{
699	rese = ress = req;
700
701	/* write a dummy byte to the pipe so fh becomes ready */
702	write (respipe [1], &respipe, 1);
703	}
704
705	pthread_mutex_unlock (&reslock);
706	}
707	while (type != REQ_QUIT);
708
709	return 0;
710	}
711
712	/*****************************************************************************/
713
714	static void atfork_prepare (void)
715	{
716	pthread_mutex_lock (&reqlock);
717	pthread_mutex_lock (&reslock);
718	#if !HAVE_PREADWRITE
719	pthread_mutex_lock (&preadwritelock);
720	#endif
721	#if !HAVE_READDIR_R
722	pthread_mutex_lock (&readdirlock);
723	#endif
724	}
725
726	static void atfork_parent (void)
727	{
728	#if !HAVE_READDIR_R
729	pthread_mutex_unlock (&readdirlock);
730	#endif
731	#if !HAVE_PREADWRITE
732	pthread_mutex_unlock (&preadwritelock);
733	#endif
734	pthread_mutex_unlock (&reslock);
735	pthread_mutex_unlock (&reqlock);
736	}	553	}
737		554
738	static void atfork_child (void)	555	static void atfork_child (void)
739	{	556	{
740	aio_req prv;
741
742	started = 0;
743
744	while (reqs)
745	{
746	prv = reqs;
747	reqs = prv->next;
748	free_req (prv);
749	}
750
751	reqs = reqe = 0;
752
753	while (ress)
754	{
755	prv = ress;
756	ress = prv->next;
757	free_req (prv);
758	}
759
760	ress = rese = 0;
761
762	close (respipe [0]);
763	close (respipe [1]);
764	create_pipe ();	557	create_respipe ();
		558	}
765		559
766	atfork_parent ();	560	static SV *
		561	get_cb (SV *cb_sv)
		562	{
		563	SvGETMAGIC (cb_sv);
		564	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
767	}	565	}
768		566
769	#define dREQ \	567	#define dREQ \
		568	SV *cb_cv; \
770	aio_req req; \	569	aio_req req; \
		570	int req_pri = next_pri; \
		571	next_pri = EIO_PRI_DEFAULT; \
771	\	572	\
772	if (SvOK (callback) && !SvROK (callback)) \	573	cb_cv = get_cb (callback); \
773	croak ("clalback must be undef or of reference type"); \
774	\	574	\
775	Newz (0, req, 1, aio_cb); \	575	Newz (0, req, 1, eio_req); \
776	if (!req) \	576	if (!req) \
777	croak ("out of memory during aio_req allocation"); \	577	croak ("out of memory during eio_req allocation"); \
778	\	578	\
779	req->callback = newSVsv (callback);	579	req->callback = SvREFCNT_inc (cb_cv); \
780		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
781	MODULE = IO::AIO PACKAGE = IO::AIO	590	MODULE = IO::AIO PACKAGE = IO::AIO
782		591
783	PROTOTYPES: ENABLE	592	PROTOTYPES: ENABLE
784		593
785	BOOT:	594	BOOT:
786	{	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
787	create_pipe ();	667	create_respipe ();
788	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
789	}
790		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
791	void	676	void
792	min_parallel (nthreads)	677	max_poll_reqs (int nreqs)
793	int nthreads
794	PROTOTYPE: $	678	PROTOTYPE: $
		679	CODE:
		680	eio_set_max_poll_reqs (nreqs);
795		681
796	void	682	void
797	max_parallel (nthreads)	683	max_poll_time (double nseconds)
798	int nthreads
799	PROTOTYPE: $	684	PROTOTYPE: $
800
801	int
802	max_outstanding (nreqs)
803	int nreqs
804	PROTOTYPE: $
805	CODE:	685	CODE:
806	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:
807	max_outstanding = nreqs;	710	max_outstanding = maxreqs;
808		711
809	void	712	void
810	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	713	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
811	SV * pathname
812	int flags
813	int mode
814	SV * callback
815	PROTOTYPE: $$$;$	714	PROTOTYPE: $$$;$
816	CODE:	715	PPCODE:
817	{	716	{
818	dREQ;	717	dREQ;
819		718
820	req->type = REQ_OPEN;	719	req->type = EIO_OPEN;
821	req->data = newSVsv (pathname);	720	req->sv1 = newSVsv (pathname);
822	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
823	req->fd = flags;	722	req->int1 = flags;
824	req->mode = mode;	723	req->int2 = mode;
825		724
826	send_req (req);	725	REQ_SEND;
827	}	726	}
828		727
829	void	728	void
830	aio_close (fh,callback=&PL_sv_undef)	729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
831	SV * fh
832	SV * callback
833	PROTOTYPE: $;$	730	PROTOTYPE: $;$
834	ALIAS:	731	ALIAS:
835	aio_close = REQ_CLOSE
836	aio_fsync = REQ_FSYNC	732	aio_fsync = EIO_FSYNC
837	aio_fdatasync = REQ_FDATASYNC	733	aio_fdatasync = EIO_FDATASYNC
838	CODE:	734	PPCODE:
839	{	735	{
		736	int fd = s_fileno_croak (fh, 0);
840	dREQ;	737	dREQ;
841		738
842	req->type = ix;	739	req->type = ix;
843	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
844	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	741	req->int1 = fd;
845		742
846	send_req (req);	743	REQ_SEND (req);
847	}	744	}
848		745
849	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: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
850	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
851	SV * fh
852	UV offset
853	UV length
854	SV * data
855	UV dataoffset
856	SV * callback
857	ALIAS:	795	ALIAS:
858	aio_read = REQ_READ	796	aio_read = EIO_READ
859	aio_write = REQ_WRITE	797	aio_write = EIO_WRITE
860	PROTOTYPE: $$$$$;$	798	PROTOTYPE: $$$$$;$
861	CODE:	799	PPCODE:
862	{	800	{
863	aio_req req;
864	STRLEN svlen;	801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
865	char *svptr = SvPVbyte (data, svlen);	803	char *svptr = SvPVbyte (data, svlen);
866		804	UV len = SvUV (length);
867	SvUPGRADE (data, SVt_PV);
868	SvPOK_on (data);
869		805
870	if (dataoffset < 0)	806	if (dataoffset < 0)
871	dataoffset += svlen;	807	dataoffset += svlen;
872		808
873	if (dataoffset < 0 || dataoffset > svlen)	809	if (dataoffset < 0 || dataoffset > svlen)
874	croak ("data offset outside of string");	810	croak ("dataoffset outside of data scalar");
875		811
876	if (ix == REQ_WRITE)	812	if (ix == EIO_WRITE)
877	{	813	{
878	/* write: check length and adjust. */	814	/* write: check length and adjust. */
879	if (length < 0 || length + dataoffset > svlen)	815	if (!SvOK (length) || len + dataoffset > svlen)
880	length = svlen - dataoffset;	816	len = svlen - dataoffset;
881	}	817	}
882	else	818	else
883	{	819	{
884	/* read: grow scalar as necessary */	820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
885	svptr = SvGROW (data, length + dataoffset);	822	svptr = SvGROW (data, len + dataoffset + 1);
886	}	823	}
887
888	if (length < 0)
889	croak ("length must not be negative");
890		824
891	{	825	{
892	dREQ;	826	dREQ;
893		827
894	req->type = ix;	828	req->type = ix;
895	req->fh = newSVsv (fh);	829	req->sv1 = newSVsv (fh);
896	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	830	req->int1 = fd;
897	: IoOFP (sv_2io (fh)));	831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
898	req->offset = offset;	832	req->size = len;
899	req->length = length;
900	req->data = SvREFCNT_inc (data);	833	req->sv2 = SvREFCNT_inc (data);
901	req->dataptr = (char *)svptr + dataoffset;	834	req->ptr2 = (char *)svptr + dataoffset;
		835	req->stroffset = dataoffset;
902		836
903	if (!SvREADONLY (data))	837	if (!SvREADONLY (data))
904	{	838	{
905	SvREADONLY_on (data);	839	SvREADONLY_on (data);
906	req->data2ptr = (void *)data;	840	req->flags |= FLAG_SV2_RO_OFF;
907	}	841	}
908		842
909	send_req (req);	843	REQ_SEND;
910	}	844	}
911	}	845	}
912		846
913	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
914	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)
915	SV * out_fh
916	SV * in_fh
917	UV in_offset
918	UV length
919	SV * callback
920	PROTOTYPE: $$$$;$	864	PROTOTYPE: $$$$;$
921	CODE:	865	PPCODE:
922	{	866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
923	dREQ;	869	dREQ;
924		870
925	req->type = REQ_SENDFILE;	871	req->type = EIO_SENDFILE;
926	req->fh = newSVsv (out_fh);	872	req->sv1 = newSVsv (out_fh);
927	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	873	req->int1 = ofd;
928	req->fh2 = newSVsv (in_fh);	874	req->sv2 = newSVsv (in_fh);
929	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	875	req->int2 = ifd;
930	req->offset = in_offset;	876	req->offs = in_offset;
931	req->length = length;	877	req->size = length;
932		878
933	send_req (req);	879	REQ_SEND;
934	}	880	}
935		881
936	void	882	void
937	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
938	SV * fh
939	UV offset
940	IV length
941	SV * callback
942	PROTOTYPE: $$$;$	884	PROTOTYPE: $$$;$
943	CODE:	885	PPCODE:
944	{	886	{
		887	int fd = s_fileno_croak (fh, 0);
945	dREQ;	888	dREQ;
946		889
947	req->type = REQ_READAHEAD;	890	req->type = EIO_READAHEAD;
948	req->fh = newSVsv (fh);	891	req->sv1 = newSVsv (fh);
949	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	892	req->int1 = fd;
950	req->offset = offset;	893	req->offs = offset;
951	req->length = length;	894	req->size = length;
952		895
953	send_req (req);	896	REQ_SEND;
954	}	897	}
955		898
956	void	899	void
957	aio_stat (fh_or_path,callback=&PL_sv_undef)	900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
958	SV * fh_or_path
959	SV * callback
960	ALIAS:	901	ALIAS:
961	aio_stat = REQ_STAT	902	aio_stat = EIO_STAT
962	aio_lstat = REQ_LSTAT	903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
963	CODE:	905	PPCODE:
964	{	906	{
965	dREQ;	907	dREQ;
966		908
967	New (0, req->statdata, 1, Stat_t);	909	req->sv1 = newSVsv (fh_or_path);
968	if (!req->statdata)
969	{
970	free_req (req);
971	croak ("out of memory during aio_req->statdata allocation");
972	}
973		910
974	if (SvPOK (fh_or_path))	911	if (SvPOK (req->sv1))
975	{	912	{
976	req->type = ix;	913	req->type = ix;
977	req->data = newSVsv (fh_or_path);
978	req->dataptr = SvPVbyte_nolen (req->data);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
979	}	915	}
980	else	916	else
981	{	917	{
982	req->type = REQ_FSTAT;	918	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
983	req->fh = newSVsv (fh_or_path);
984	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))
985	}	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	}
986		945
987	send_req (req);	946	REQ_SEND;
988	}	947	}
989		948
990	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
991	aio_unlink (pathname,callback=&PL_sv_undef)	1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
992	SV * pathname
993	SV * callback
994	ALIAS:	1041	ALIAS:
995	aio_unlink = REQ_UNLINK	1042	aio_unlink = EIO_UNLINK
996	aio_rmdir = REQ_RMDIR	1043	aio_rmdir = EIO_RMDIR
997	aio_readdir = REQ_READDIR	1044	aio_readdir = EIO_READDIR
998	CODE:	1045	PPCODE:
999	{	1046	{
1000	dREQ;	1047	dREQ;
1001		1048
1002	req->type = ix;	1049	req->type = ix;
1003	req->data = newSVsv (pathname);	1050	req->sv1 = newSVsv (pathname);
1004	req->dataptr = SvPVbyte_nolen (req->data);	1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
1005
1006	send_req (req);
1007	}
1008		1052
		1053	REQ_SEND;
		1054	}
		1055
1009	void	1056	void
1010	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1011	SV * oldpath
1012	SV * newpath
1013	SV * callback
1014	ALIAS:	1058	ALIAS:
1015	aio_link = REQ_LINK	1059	aio_link = EIO_LINK
1016	aio_symlink = REQ_SYMLINK	1060	aio_symlink = EIO_SYMLINK
1017	aio_rename = REQ_RENAME	1061	aio_rename = EIO_RENAME
1018	CODE:	1062	PPCODE:
1019	{	1063	{
1020	dREQ;	1064	dREQ;
1021		1065
1022	req->type = ix;	1066	req->type = ix;
1023	req->fh = newSVsv (oldpath);	1067	req->sv1 = newSVsv (oldpath);
1024	req->data2ptr = SvPVbyte_nolen (req->fh);	1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	req->data = newSVsv (newpath);	1069	req->sv2 = newSVsv (newpath);
1026	req->dataptr = SvPVbyte_nolen (req->data);	1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
1027		1071
1028	send_req (req);	1072	REQ_SEND;
1029	}	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;
1030		1184
1031	void	1185	void
1032	flush ()	1186	flush ()
1033	PROTOTYPE:	1187	PROTOTYPE:
1034	CODE:	1188	CODE:
1035	while (nreqs)	1189	while (eio_nreqs ())
1036	{	1190	{
1037	poll_wait ();	1191	poll_wait ();
1038	poll_cb ();	1192	poll_cb ();
1039	}	1193	}
1040		1194
1041	void	1195	int
1042	poll()	1196	poll()
1043	PROTOTYPE:	1197	PROTOTYPE:
1044	CODE:	1198	CODE:
1045	if (nreqs)
1046	{
1047	poll_wait ();	1199	poll_wait ();
1048	poll_cb ();	1200	RETVAL = poll_cb ();
1049	}	1201	OUTPUT:
		1202	RETVAL
1050		1203
1051	int	1204	int
1052	poll_fileno()	1205	poll_fileno()
1053	PROTOTYPE:	1206	PROTOTYPE:
1054	CODE:	1207	CODE:
1055	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
1056	OUTPUT:	1209	OUTPUT:
1057	RETVAL	1210	RETVAL
1058		1211
1059	int	1212	int
1060	poll_cb(...)	1213	poll_cb(...)
…		…
1066		1219
1067	void	1220	void
1068	poll_wait()	1221	poll_wait()
1069	PROTOTYPE:	1222	PROTOTYPE:
1070	CODE:	1223	CODE:
1071	if (nreqs)
1072	poll_wait ();	1224	poll_wait ();
1073		1225
1074	int	1226	int
1075	nreqs()	1227	nreqs()
1076	PROTOTYPE:	1228	PROTOTYPE:
1077	CODE:	1229	CODE:
1078	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
1079	OUTPUT:	1231	OUTPUT:
1080	RETVAL	1232	RETVAL
1081		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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