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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.148 by root, Wed Jun 17 01:14:48 2009 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
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
13	#include <sys/types.h>	12	#include <sys/types.h>
14	#include <sys/stat.h>	13	#include <sys/stat.h>
15	#include <limits.h>	14	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	15	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	16	#include <sched.h>
20		17
21	#if HAVE_SENDFILE	18	/* perl namespace pollution */
22	# if __linux	19	#undef VERSION
23	# include <sys/sendfile.h>	20
24	# elif __freebsd	21	#ifdef _WIN32
25	# include <sys/socket.h>	22
26	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __hpux	24	# undef malloc
28	# include <sys/socket.h>	25	# undef free
29	# elif __solaris /* not yet */	26
30	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
31	# else	59	#else
32	# error sendfile support requested but not available	60
33	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
34	#endif	68	#endif
35		69
36	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
37	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
38	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define VAL64 IV
		81	# define SvVAL64 SvIV
		82	# define newSVval64 newSViv
		83	#else
		84	# define VAL64 NV
		85	# define SvVAL64 SvNV
		86	# define newSVval64 newSVnv
39	#endif	87	#endif
40		88
41	#if __ia64	89	/*****************************************************************************/
42	# define STACKSIZE 65536	90
		91	#if __GNUC__ >= 3
		92	# define expect(expr,value) __builtin_expect ((expr),(value))
43	#else	93	#else
44	# define STACKSIZE 8192	94	# define expect(expr,value) (expr)
45	#endif	95	#endif
46		96
		97	#define expect_false(expr) expect ((expr) != 0, 0)
		98	#define expect_true(expr) expect ((expr) != 0, 1)
		99
		100	/*****************************************************************************/
		101
		102	static HV *stash;
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	#define AIO_REQ_KLASS "IO::AIO::REQ"
		108	#define AIO_GRP_KLASS "IO::AIO::GRP"
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	#endif
		123
		124	#ifndef POSIX_FADV_SEQUENTIAL
		125	# define POSIX_FADV_SEQUENTIAL 0
		126	#endif
		127
		128	#ifndef POSIX_FADV_RANDOM
		129	# define POSIX_FADV_RANDOM 0
		130	#endif
		131
		132	#ifndef POSIX_FADV_NOREUSE
		133	# define POSIX_FADV_NOREUSE 0
		134	#endif
		135
		136	#ifndef POSIX_FADV_WILLNEED
		137	# define POSIX_FADV_WILLNEED 0
		138	#endif
		139
		140	#ifndef POSIX_FADV_DONTNEED
		141	# define POSIX_FADV_DONTNEED 0
		142	#endif
		143
		144	static int req_invoke (eio_req *req);
		145	#define EIO_FINISH(req) req_invoke (req)
		146	static void req_destroy (eio_req *grp);
		147	#define EIO_DESTROY(req) req_destroy (req)
		148
47	enum {	149	enum {
48	REQ_QUIT,	150	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,
55	REQ_READDIR,
56	REQ_SYMLINK,
57	};	151	};
58		152
59	typedef struct aio_cb {	153	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		154
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;	155	typedef eio_req *aio_req;
		156	typedef eio_req *aio_req_ornot;
80		157
81	static int started, wanted;	158	static SV *on_next_submit;
82	static volatile int nreqs;	159	static int next_pri = EIO_PRI_DEFAULT;
83	static int max_outstanding = 1<<30;	160	static int max_outstanding;
84	static int respipe [2];
85		161
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	162	static int respipe_osf [2], respipe [2] = { -1, -1 };
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		163
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	164	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)	165	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		166
		167	static void want_poll (void)
		168	{
		169	/* write a dummy byte to the pipe so fh becomes ready */
		170	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		171	}
		172
		173	static void done_poll (void)
		174	{
		175	/* read any signals sent by the worker threads */
		176	char buf [4];
		177	while (respipe_read (respipe [0], buf, 4) == 4)
		178	;
		179	}
		180
		181	/* must be called at most once */
		182	static SV *req_sv (aio_req req, const char *klass)
		183	{
		184	if (!req->self)
		185	{
		186	req->self = (SV *)newHV ();
		187	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		188	}
		189
		190	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		191	}
		192
		193	static aio_req SvAIO_REQ (SV *sv)
		194	{
		195	MAGIC *mg;
		196
		197	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		198	croak ("object of class " AIO_REQ_KLASS " expected");
		199
		200	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		201
		202	return mg ? (aio_req)mg->mg_ptr : 0;
		203	}
		204
		205	static void aio_grp_feed (aio_req grp)
		206	{
		207	if (grp->sv2 && SvOK (grp->sv2))
		208	{
		209	dSP;
		210
		211	ENTER;
		212	SAVETMPS;
		213	PUSHMARK (SP);
		214	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		215	PUTBACK;
		216	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		217	SPAGAIN;
		218	FREETMPS;
		219	LEAVE;
		220	}
		221	}
		222
		223	static void req_submit (eio_req *req)
		224	{
		225	eio_submit (req);
		226
		227	if (expect_false (on_next_submit))
		228	{
		229	dSP;
		230	SV *cb = sv_2mortal (on_next_submit);
		231
		232	on_next_submit = 0;
		233
		234	PUSHMARK (SP);
		235	PUTBACK;
		236	call_sv (cb, G_DISCARD | G_EVAL);
		237	}
		238	}
		239
		240	static int req_invoke (eio_req *req)
		241	{
		242	dSP;
		243
		244	if (req->flags & FLAG_SV2_RO_OFF)
		245	SvREADONLY_off (req->sv2);
		246
		247	if (!EIO_CANCELLED (req) && req->callback)
		248	{
		249	ENTER;
		250	SAVETMPS;
		251	PUSHMARK (SP);
		252	EXTEND (SP, 1);
		253
		254	switch (req->type)
		255	{
		256	case EIO_READDIR:
		257	{
		258	SV *rv = &PL_sv_undef;
		259
		260	if (req->result >= 0)
		261	{
		262	int i;
		263	char *names = (char *)req->ptr2;
		264	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		265	AV *av = newAV ();
		266
		267	av_extend (av, req->result - 1);
		268
		269	for (i = 0; i < req->result; ++i)
		270	{
		271	if (req->int1 & EIO_READDIR_DENTS)
		272	{
		273	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		274
		275	if (req->int1 & EIO_READDIR_CUSTOM2)
		276	{
		277	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		278	AV *avent = newAV ();
		279
		280	av_extend (avent, 2);
		281
		282	if (!sv_type [ent->type])
		283	{
		284	sv_type [ent->type] = newSViv (ent->type);
		285	SvREADONLY_on (sv_type [ent->type]);
		286	}
		287
		288	av_store (avent, 0, namesv);
		289	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		290	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		291
		292	av_store (av, i, newRV_noinc ((SV *)avent));
		293	}
		294	else
		295	av_store (av, i, namesv);
		296
		297	++ent;
		298	}
		299	else
		300	{
		301	SV *name = newSVpv (names, 0);
		302	av_store (av, i, name);
		303	names += SvCUR (name) + 1;
		304	}
		305	}
		306
		307	rv = sv_2mortal (newRV_noinc ((SV *)av));
		308	}
		309
		310	PUSHs (rv);
		311
		312	if (req->int1 & EIO_READDIR_CUSTOM1)
		313	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		314	}
		315	break;
		316
		317	case EIO_OPEN:
		318	{
		319	/* convert fd to fh */
		320	SV *fh = &PL_sv_undef;
		321
		322	if (req->result >= 0)
		323	{
		324	GV *gv = (GV *)sv_newmortal ();
		325	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		326	char sym [64];
		327	int symlen;
		328
		329	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		330	gv_init (gv, stash, sym, symlen, 0);
		331
		332	symlen = snprintf (
		333	sym,
		334	sizeof (sym),
		335	"%s&=%d",
		336	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		337	(int)req->result
		338	);
		339
		340	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		341	fh = (SV *)gv;
		342	}
		343
		344	PUSHs (fh);
		345	}
		346	break;
		347
		348	case EIO_GROUP:
		349	req->int1 = 2; /* mark group as finished */
		350
		351	if (req->sv1)
		352	{
		353	int i;
		354	AV *av = (AV *)req->sv1;
		355
		356	EXTEND (SP, AvFILL (av) + 1);
		357	for (i = 0; i <= AvFILL (av); ++i)
		358	PUSHs (*av_fetch (av, i, 0));
		359	}
		360	break;
		361
		362	case EIO_NOP:
		363	case EIO_BUSY:
		364	break;
		365
		366	case EIO_READLINK:
		367	if (req->result > 0)
		368	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		369	break;
		370
		371	case EIO_STAT:
		372	case EIO_LSTAT:
		373	case EIO_FSTAT:
		374	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		375	PL_laststatval = req->result;
		376	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		377	PUSHs (sv_2mortal (newSViv (req->result)));
		378	break;
		379
		380	case EIO_READ:
		381	{
		382	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		383	*SvEND (req->sv2) = 0;
		384	SvPOK_only (req->sv2);
		385	SvSETMAGIC (req->sv2);
		386	PUSHs (sv_2mortal (newSViv (req->result)));
		387	}
		388	break;
		389
		390	case EIO_DUP2:
		391	if (req->result > 0)
		392	req->result = 0;
		393	/* FALLTHROUGH */
		394
		395	default:
		396	PUSHs (sv_2mortal (newSViv (req->result)));
		397	break;
		398	}
		399
		400	errno = req->errorno;
		401
		402	PUTBACK;
		403	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		404	SPAGAIN;
		405
		406	FREETMPS;
		407	LEAVE;
		408
		409	PUTBACK;
		410	}
		411
		412	return !!SvTRUE (ERRSV);
		413	}
		414
		415	static void req_destroy (aio_req req)
		416	{
98	if (req->fh)	417	if (req->self)
		418	{
		419	sv_unmagic (req->self, PERL_MAGIC_ext);
99	SvREFCNT_dec (req->fh);	420	SvREFCNT_dec (req->self);
		421	}
100		422
101	if (req->fh2)	423	SvREFCNT_dec (req->sv1);
102	SvREFCNT_dec (req->fh2);	424	SvREFCNT_dec (req->sv2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	425	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112		426
113	Safefree (req);	427	Safefree (req);
114	}	428	}
115		429
		430	static void req_cancel_subs (aio_req grp)
		431	{
		432	aio_req sub;
		433
		434	if (grp->type != EIO_GROUP)
		435	return;
		436
		437	SvREFCNT_dec (grp->sv2);
		438	grp->sv2 = 0;
		439
		440	eio_grp_cancel (grp);
		441	}
		442
		443	#ifdef USE_SOCKETS_AS_HANDLES
		444	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		445	#else
		446	# define TO_SOCKET(x) (x)
		447	#endif
		448
116	static void	449	static void
117	poll_wait ()	450	create_respipe (void)
118	{	451	{
119	if (nreqs && !ress)	452	int old_readfd = respipe [0];
		453
		454	if (respipe [1] >= 0)
		455	respipe_close (TO_SOCKET (respipe [1]));
		456
		457	#ifdef _WIN32
		458	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		459	#else
		460	if (pipe (respipe))
		461	#endif
		462	croak ("unable to initialize result pipe");
		463
		464	if (old_readfd >= 0)
120	{	465	{
121	fd_set rfd;	466	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
122	FD_ZERO(&rfd);	467	croak ("unable to initialize result pipe(2)");
123	FD_SET(respipe [0], &rfd);
124		468
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	469	respipe_close (respipe [0]);
		470	respipe [0] = old_readfd;
126	}	471	}
127	}
128		472
129	static int	473	#ifdef _WIN32
130	poll_cb ()	474	int arg = 1;
131	{	475	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
132	dSP;	476	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
133	int count = 0;	477	#else
134	int do_croak = 0;	478	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
135	aio_req req;	479	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		480	#endif
		481	croak ("unable to initialize result pipe(3)");
136		482
		483	respipe_osf [0] = TO_SOCKET (respipe [0]);
		484	respipe_osf [1] = TO_SOCKET (respipe [1]);
		485	}
		486
		487	static void poll_wait (void)
		488	{
		489	fd_set rfd;
		490
		491	while (eio_nreqs ())
		492	{
		493	int size;
		494
		495	X_LOCK (reslock);
		496	size = res_queue.size;
		497	X_UNLOCK (reslock);
		498
		499	if (size)
		500	return;
		501
		502	etp_maybe_start_thread ();
		503
		504	FD_ZERO (&rfd);
		505	FD_SET (respipe [0], &rfd);
		506
		507	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		508	}
		509	}
		510
		511	static int poll_cb (void)
		512	{
137	for (;;)	513	for (;;)
138	{	514	{
139	pthread_mutex_lock (&reslock);	515	int res = eio_poll ();
140	req = ress;
141		516
142	if (req)	517	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);	518	croak (0);
240	}
241	}
242		519
243	LEAVE;	520	if (!max_outstanding || max_outstanding > eio_nreqs ())
		521	return res;
244		522
245	errno = errorno;	523	poll_wait ();
246	count++;
247	}
248
249	free_req (req);
250	}	524	}
251
252	return count;
253	}	525	}
254		526
255	static void *aio_proc(void *arg);	527	static void atfork_child (void)
256
257	static void
258	start_thread (void)
259	{	528	{
260	sigset_t fullsigset, oldsigset;	529	create_respipe ();
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	}	530	}
276		531
277	static void	532	static SV *
278	send_req (aio_req req)	533	get_cb (SV *cb_sv)
279	{	534	{
280	while (started < wanted && nreqs >= started)	535	HV *st;
281	start_thread ();	536	GV *gvp;
		537	CV *cv;
282		538
283	nreqs++;	539	if (!SvOK (cb_sv))
		540	return 0;
284		541
285	pthread_mutex_lock (&reqlock);	542	cv = sv_2cv (cb_sv, &st, &gvp, 0);
286		543
287	req->next = 0;	544	if (!cv)
		545	croak ("IO::AIO callback must be undef or a CODE reference");
288		546
289	if (reqe)	547	return (SV *)cv;
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	}	548	}
311		549
312	static void	550	#define dREQ \
313	end_thread (void)	551	SV *cb_cv; \
314	{
315	aio_req req;	552	aio_req req; \
		553	int req_pri = next_pri; \
		554	next_pri = EIO_PRI_DEFAULT; \
		555	\
		556	cb_cv = get_cb (callback); \
		557	\
316	Newz (0, req, 1, aio_cb);	558	Newz (0, req, 1, eio_req); \
317	req->type = REQ_QUIT;	559	if (!req) \
		560	croak ("out of memory during eio_req allocation"); \
		561	\
		562	req->callback = SvREFCNT_inc (cb_cv); \
		563	req->pri = req_pri
318		564
319	send_req (req);	565	#define REQ_SEND \
320	}	566	PUTBACK; \
		567	req_submit (req); \
		568	SPAGAIN; \
		569	\
		570	if (GIMME_V != G_VOID) \
		571	XPUSHs (req_sv (req, AIO_REQ_KLASS));
321		572
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	573	static int
375	pread (int fd, void *buf, size_t count, off_t offset)	574	extract_fd (SV *fh, int wr)
376	{	575	{
377	ssize_t res;	576	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
378	off_t ooffset;
379		577
380	pthread_mutex_lock (&preadwritelock);	578	if (fd < 0)
381	ooffset = lseek (fd, 0, SEEK_CUR);	579	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386		580
387	return res;	581	return fd;
388	}	582	}
389		583
390	static ssize_t	584	MODULE = IO::AIO PACKAGE = IO::AIO
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395		585
396	pthread_mutex_lock (&preadwritelock);	586	PROTOTYPES: ENABLE
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		587
403	return res;	588	BOOT:
404	}	589	{
		590	static const struct {
		591	const char *name;
		592	IV iv;
		593	} *civ, const_iv[] = {
		594	# define const_iv(name, value) { # name, (IV) value },
		595	# define const_eio(name) { # name, (IV) EIO_ ## name },
		596	const_iv (EXDEV , EXDEV)
		597	const_iv (ENOSYS , ENOSYS)
		598	const_iv (O_RDONLY, O_RDONLY)
		599	const_iv (O_WRONLY, O_WRONLY)
		600	const_iv (O_CREAT , O_CREAT)
		601	const_iv (O_TRUNC , O_TRUNC)
		602	#ifndef _WIN32
		603	const_iv (S_IFIFO , S_IFIFO)
405	#endif	604	#endif
		605	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		606	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		607	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		608	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		609	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		610	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
406		611
407	#if !HAVE_FDATASYNC	612	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
408	# define fdatasync fsync	613	const_eio (SYNC_FILE_RANGE_WRITE)
409	#endif	614	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
410		615
411	#if !HAVE_READAHEAD	616	const_eio (READDIR_DENTS)
412	# define readahead aio_readahead	617	const_eio (READDIR_DIRS_FIRST)
		618	const_eio (READDIR_STAT_ORDER)
		619	const_eio (READDIR_FOUND_UNKNOWN)
413		620
414	static ssize_t	621	const_eio (DT_UNKNOWN)
415	readahead (int fd, off_t offset, size_t count)	622	const_eio (DT_FIFO)
416	{	623	const_eio (DT_CHR)
417	char readahead_buf[4096];	624	const_eio (DT_DIR)
418		625	const_eio (DT_BLK)
419	while (count > 0)	626	const_eio (DT_REG)
420	{	627	const_eio (DT_LNK)
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	628	const_eio (DT_SOCK)
422		629	const_eio (DT_WHT)
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	}	630	};
489		631
490	# elif __hpux	632	stash = gv_stashpv ("IO::AIO", 1);
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492		633
493	# elif __solaris	634	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
494	{	635	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
495	struct sendfilevec vec;
496	size_t sbytes;
497		636
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_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
675
676	case REQ_QUIT:
677	break;
678
679	default:
680	req->result = ENOSYS;
681	break;
682	}
683
684	req->errorno = errno;
685
686	pthread_mutex_lock (&reslock);
687
688	req->next = 0;
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);
701	}
702
703	pthread_mutex_unlock (&reslock);
704	}
705	while (type != REQ_QUIT);
706
707	return 0;
708	}
709
710	/*****************************************************************************/
711
712	static void atfork_prepare (void)
713	{
714	pthread_mutex_lock (&reqlock);
715	pthread_mutex_lock (&reslock);
716	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);
718	#endif
719	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);
721	#endif
722	}
723
724	static void atfork_parent (void)
725	{
726	#if !HAVE_READDIR_R
727	pthread_mutex_unlock (&readdirlock);
728	#endif
729	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);
731	#endif
732	pthread_mutex_unlock (&reslock);
733	pthread_mutex_unlock (&reqlock);
734	}
735
736	static void atfork_child (void)
737	{
738	aio_req prv;
739
740	started = 0;
741
742	while (reqs)
743	{
744	prv = reqs;
745	reqs = prv->next;
746	free_req (prv);
747	}
748
749	reqs = reqe = 0;
750
751	while (ress)
752	{
753	prv = ress;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759
760	close (respipe [0]);
761	close (respipe [1]);
762	create_pipe ();	637	create_respipe ();
763		638
764	atfork_parent ();	639	if (eio_init (want_poll, done_poll) < 0)
765	}	640	croak ("IO::AIO: unable to initialise eio library");
766		641
767	#define dREQ \	642	/* atfork child called in fifo order, so before eio's handler */
768	aio_req req; \	643	X_THREAD_ATFORK (0, 0, atfork_child);
769	\
770	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \
772	\
773	Newz (0, req, 1, aio_cb); \
774	if (!req) \
775	croak ("out of memory during aio_req allocation"); \
776	\
777	req->callback = newSVsv (callback);
778
779	MODULE = IO::AIO PACKAGE = IO::AIO
780
781	PROTOTYPES: ENABLE
782
783	BOOT:
784	{
785	create_pipe ();
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}	644	}
788		645
789	void	646	void
790	min_parallel(nthreads)	647	max_poll_reqs (int nreqs)
791	int nthreads
792	PROTOTYPE: $	648	PROTOTYPE: $
		649	CODE:
		650	eio_set_max_poll_reqs (nreqs);
793		651
794	void	652	void
795	max_parallel(nthreads)	653	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	654	PROTOTYPE: $
798
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:	655	CODE:
804	RETVAL = max_outstanding;	656	eio_set_max_poll_time (nseconds);
		657
		658	void
		659	min_parallel (int nthreads)
		660	PROTOTYPE: $
		661	CODE:
		662	eio_set_min_parallel (nthreads);
		663
		664	void
		665	max_parallel (int nthreads)
		666	PROTOTYPE: $
		667	CODE:
		668	eio_set_max_parallel (nthreads);
		669
		670	void
		671	max_idle (int nthreads)
		672	PROTOTYPE: $
		673	CODE:
		674	eio_set_max_idle (nthreads);
		675
		676	void
		677	max_outstanding (int maxreqs)
		678	PROTOTYPE: $
		679	CODE:
805	max_outstanding = nreqs;	680	max_outstanding = maxreqs;
806		681
807	void	682	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	683	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
809	SV * pathname
810	int flags
811	int mode
812	SV * callback
813	PROTOTYPE: $$$;$	684	PROTOTYPE: $$$;$
814	CODE:	685	PPCODE:
815	{	686	{
816	dREQ;	687	dREQ;
817		688
818	req->type = REQ_OPEN;	689	req->type = EIO_OPEN;
819	req->data = newSVsv (pathname);	690	req->sv1 = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	691	req->ptr1 = SvPVbyte_nolen (req->sv1);
821	req->fd = flags;	692	req->int1 = flags;
822	req->mode = mode;	693	req->int2 = mode;
823		694
824	send_req (req);	695	REQ_SEND;
825	}	696	}
826		697
827	void	698	void
828	aio_close(fh,callback=&PL_sv_undef)	699	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
829	SV * fh
830	SV * callback
831	PROTOTYPE: $;$	700	PROTOTYPE: $;$
832	ALIAS:	701	ALIAS:
833	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	702	aio_fsync = EIO_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	703	aio_fdatasync = EIO_FDATASYNC
836	CODE:	704	PPCODE:
837	{	705	{
		706	int fd = extract_fd (fh, 0);
838	dREQ;	707	dREQ;
839		708
840	req->type = ix;	709	req->type = ix;
841	req->fh = newSVsv (fh);	710	req->sv1 = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	711	req->int1 = fd;
843		712
844	send_req (req);	713	REQ_SEND (req);
845	}	714	}
846		715
847	void	716	void
		717	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		718	PROTOTYPE: $$$$;$
		719	PPCODE:
		720	{
		721	int fd = extract_fd (fh, 0);
		722	dREQ;
		723
		724	req->type = EIO_SYNC_FILE_RANGE;
		725	req->sv1 = newSVsv (fh);
		726	req->int1 = fd;
		727	req->offs = offset;
		728	req->size = nbytes;
		729	req->int2 = flags;
		730
		731	REQ_SEND (req);
		732	}
		733
		734	void
		735	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		736	PROTOTYPE: $;$
		737	PPCODE:
		738	{
		739	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		740	int fd = extract_fd (fh, 0);
		741	dREQ;
		742
		743	if (close_pipe < 0)
		744	{
		745	int pipefd [2];
		746
		747	if (pipe (pipefd) < 0
		748	|| close (pipefd [1]) < 0
		749	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		750	abort (); /*D*/
		751
		752	close_pipe = pipefd [0];
		753	}
		754
		755	req->type = EIO_DUP2;
		756	req->int1 = close_pipe;
		757	req->sv2 = newSVsv (fh);
		758	req->int2 = fd;
		759
		760	REQ_SEND (req);
		761	}
		762
		763	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	764	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
849	SV * fh
850	UV offset
851	UV length
852	SV * data
853	UV dataoffset
854	SV * callback
855	ALIAS:	765	ALIAS:
856	aio_read = REQ_READ	766	aio_read = EIO_READ
857	aio_write = REQ_WRITE	767	aio_write = EIO_WRITE
858	PROTOTYPE: $$$$$;$	768	PROTOTYPE: $$$$$;$
859	CODE:	769	PPCODE:
860	{	770	{
861	aio_req req;
862	STRLEN svlen;	771	STRLEN svlen;
		772	int fd = extract_fd (fh, ix == EIO_WRITE);
863	char *svptr = SvPVbyte (data, svlen);	773	char *svptr = SvPVbyte (data, svlen);
864		774	UV len = SvUV (length);
865	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);
867		775
868	if (dataoffset < 0)	776	if (dataoffset < 0)
869	dataoffset += svlen;	777	dataoffset += svlen;
870		778
871	if (dataoffset < 0 || dataoffset > svlen)	779	if (dataoffset < 0 || dataoffset > svlen)
872	croak ("data offset outside of string");	780	croak ("dataoffset outside of data scalar");
873		781
874	if (ix == REQ_WRITE)	782	if (ix == EIO_WRITE)
875	{	783	{
876	/* write: check length and adjust. */	784	/* write: check length and adjust. */
877	if (length < 0 || length + dataoffset > svlen)	785	if (!SvOK (length) || len + dataoffset > svlen)
878	length = svlen - dataoffset;	786	len = svlen - dataoffset;
879	}	787	}
880	else	788	else
881	{	789	{
882	/* read: grow scalar as necessary */	790	/* read: check type and grow scalar as necessary */
		791	SvUPGRADE (data, SVt_PV);
883	svptr = SvGROW (data, length + dataoffset);	792	svptr = SvGROW (data, len + dataoffset + 1);
884	}	793	}
885
886	if (length < 0)
887	croak ("length must not be negative");
888		794
889	{	795	{
890	dREQ;	796	dREQ;
891		797
892	req->type = ix;	798	req->type = ix;
893	req->fh = newSVsv (fh);	799	req->sv1 = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	800	req->int1 = fd;
895	: IoOFP (sv_2io (fh)));	801	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
896	req->offset = offset;	802	req->size = len;
897	req->length = length;
898	req->data = SvREFCNT_inc (data);	803	req->sv2 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	804	req->ptr2 = (char *)svptr + dataoffset;
		805	req->stroffset = dataoffset;
900		806
901	if (!SvREADONLY (data))	807	if (!SvREADONLY (data))
902	{	808	{
903	SvREADONLY_on (data);	809	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	810	req->flags |= FLAG_SV2_RO_OFF;
905	}	811	}
906		812
907	send_req (req);	813	REQ_SEND;
908	}	814	}
909	}	815	}
910		816
911	void	817	void
		818	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		819	PROTOTYPE: $$;$
		820	PPCODE:
		821	{
		822	SV *data;
		823	dREQ;
		824
		825	req->type = EIO_READLINK;
		826	req->sv1 = newSVsv (path);
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828
		829	REQ_SEND;
		830	}
		831
		832	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	833	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
913	SV * out_fh
914	SV * in_fh
915	UV in_offset
916	UV length
917	SV * callback
918	PROTOTYPE: $$$$;$	834	PROTOTYPE: $$$$;$
919	CODE:	835	PPCODE:
920	{	836	{
		837	int ifd = extract_fd (in_fh , 0);
		838	int ofd = extract_fd (out_fh, 0);
921	dREQ;	839	dREQ;
922		840
923	req->type = REQ_SENDFILE;	841	req->type = EIO_SENDFILE;
924	req->fh = newSVsv (out_fh);	842	req->sv1 = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	843	req->int1 = ofd;
926	req->fh2 = newSVsv (in_fh);	844	req->sv2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	845	req->int2 = ifd;
928	req->offset = in_offset;	846	req->offs = in_offset;
929	req->length = length;	847	req->size = length;
930		848
931	send_req (req);	849	REQ_SEND;
932	}	850	}
933		851
934	void	852	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	853	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
936	SV * fh
937	UV offset
938	IV length
939	SV * callback
940	PROTOTYPE: $$$;$	854	PROTOTYPE: $$$;$
941	CODE:	855	PPCODE:
942	{	856	{
		857	int fd = extract_fd (fh, 0);
943	dREQ;	858	dREQ;
944		859
945	req->type = REQ_READAHEAD;	860	req->type = EIO_READAHEAD;
946	req->fh = newSVsv (fh);	861	req->sv1 = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	862	req->int1 = fd;
948	req->offset = offset;	863	req->offs = offset;
949	req->length = length;	864	req->size = length;
950		865
951	send_req (req);	866	REQ_SEND;
952	}	867	}
953		868
954	void	869	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	870	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
956	SV * fh_or_path
957	SV * callback
958	ALIAS:	871	ALIAS:
959	aio_stat = REQ_STAT	872	aio_stat = EIO_STAT
960	aio_lstat = REQ_LSTAT	873	aio_lstat = EIO_LSTAT
961	CODE:	874	PPCODE:
962	{	875	{
963	dREQ;	876	dREQ;
964		877
965	New (0, req->statdata, 1, Stat_t);	878	req->sv1 = newSVsv (fh_or_path);
966	if (!req->statdata)
967	{
968	free_req (req);
969	croak ("out of memory during aio_req->statdata allocation");
970	}
971		879
972	if (SvPOK (fh_or_path))	880	if (SvPOK (req->sv1))
973	{	881	{
974	req->type = ix;	882	req->type = ix;
975	req->data = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);	883	req->ptr1 = SvPVbyte_nolen (req->sv1);
977	}	884	}
978	else	885	else
979	{	886	{
980	req->type = REQ_FSTAT;	887	req->type = EIO_FSTAT;
981	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	888	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		889	}
		890
		891	REQ_SEND;
		892	}
		893
		894	void
		895	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		896	PPCODE:
		897	{
		898	dREQ;
		899
		900	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		901	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		902	req->sv1 = newSVsv (fh_or_path);
		903
		904	if (SvPOK (req->sv1))
983	}	905	{
		906	req->type = EIO_UTIME;
		907	req->ptr1 = SvPVbyte_nolen (req->sv1);
		908	}
		909	else
		910	{
		911	req->type = EIO_FUTIME;
		912	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		913	}
984		914
985	send_req (req);	915	REQ_SEND;
986	}	916	}
987		917
988	void	918	void
		919	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		920	PPCODE:
		921	{
		922	dREQ;
		923
		924	req->sv1 = newSVsv (fh_or_path);
		925	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		926
		927	if (SvPOK (req->sv1))
		928	{
		929	req->type = EIO_TRUNCATE;
		930	req->ptr1 = SvPVbyte_nolen (req->sv1);
		931	}
		932	else
		933	{
		934	req->type = EIO_FTRUNCATE;
		935	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		936	}
		937
		938	REQ_SEND;
		939	}
		940
		941	void
		942	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		943	ALIAS:
		944	aio_chmod = EIO_CHMOD
		945	aio_mkdir = EIO_MKDIR
		946	PPCODE:
		947	{
		948	dREQ;
		949
		950	req->int2 = mode;
		951	req->sv1 = newSVsv (fh_or_path);
		952
		953	if (SvPOK (req->sv1))
		954	{
		955	req->type = ix;
		956	req->ptr1 = SvPVbyte_nolen (req->sv1);
		957	}
		958	else
		959	{
		960	req->type = EIO_FCHMOD;
		961	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		962	}
		963
		964	REQ_SEND;
		965	}
		966
		967	void
		968	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		969	PPCODE:
		970	{
		971	dREQ;
		972
		973	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		974	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		975	req->sv1 = newSVsv (fh_or_path);
		976
		977	if (SvPOK (req->sv1))
		978	{
		979	req->type = EIO_CHOWN;
		980	req->ptr1 = SvPVbyte_nolen (req->sv1);
		981	}
		982	else
		983	{
		984	req->type = EIO_FCHOWN;
		985	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		986	}
		987
		988	REQ_SEND;
		989	}
		990
		991	void
		992	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		993	PPCODE:
		994	{
		995	dREQ;
		996
		997	req->type = EIO_READDIR;
		998	req->sv1 = newSVsv (pathname);
		999	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1000	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1001
		1002	if (flags & EIO_READDIR_DENTS)
		1003	req->int1 |= EIO_READDIR_CUSTOM2;
		1004
		1005	REQ_SEND;
		1006	}
		1007
		1008	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	1009	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
990	SV * pathname
991	SV * callback
992	ALIAS:	1010	ALIAS:
993	aio_unlink = REQ_UNLINK	1011	aio_unlink = EIO_UNLINK
994	aio_rmdir = REQ_RMDIR	1012	aio_rmdir = EIO_RMDIR
		1013	aio_readdir = EIO_READDIR
995	CODE:	1014	PPCODE:
996	{	1015	{
997	dREQ;	1016	dREQ;
998		1017
999	req->type = ix;	1018	req->type = ix;
1000	req->data = newSVsv (pathname);	1019	req->sv1 = newSVsv (pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);	1020	req->ptr1 = SvPVbyte_nolen (req->sv1);
1002
1003	send_req (req);
1004	}
1005		1021
		1022	REQ_SEND;
		1023	}
		1024
1006	void	1025	void
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1026	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1008	SV * oldpath	1027	ALIAS:
1009	SV * newpath	1028	aio_link = EIO_LINK
1010	SV * callback	1029	aio_symlink = EIO_SYMLINK
		1030	aio_rename = EIO_RENAME
1011	CODE:	1031	PPCODE:
1012	{	1032	{
1013	dREQ;	1033	dREQ;
1014		1034
1015	req->type = REQ_SYMLINK;	1035	req->type = ix;
1016	req->fh = newSVsv (oldpath);	1036	req->sv1 = newSVsv (oldpath);
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	1037	req->ptr1 = SvPVbyte_nolen (req->sv1);
1018	req->data = newSVsv (newpath);	1038	req->sv2 = newSVsv (newpath);
1019	req->dataptr = SvPVbyte_nolen (req->data);	1039	req->ptr2 = SvPVbyte_nolen (req->sv2);
1020		1040
1021	send_req (req);	1041	REQ_SEND;
1022	}	1042	}
1023		1043
1024	void	1044	void
1025	aio_readdir(pathname,callback=&PL_sv_undef)	1045	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1026	SV * pathname
1027	SV * callback
1028	CODE:	1046	PPCODE:
1029	{	1047	{
1030	dREQ;	1048	dREQ;
1031		1049
1032	req->type = REQ_READDIR;	1050	req->type = EIO_MKNOD;
1033	req->data = newSVsv (pathname);	1051	req->sv1 = newSVsv (pathname);
1034	req->dataptr = SvPVbyte_nolen (req->data);	1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1053	req->int2 = (mode_t)mode;
		1054	req->offs = dev;
1035		1055
1036	send_req (req);	1056	REQ_SEND;
1037	}	1057	}
1038		1058
1039	void	1059	void
		1060	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	dREQ;
		1064
		1065	req->type = EIO_BUSY;
		1066	req->nv1 = delay < 0. ? 0. : delay;
		1067
		1068	REQ_SEND;
		1069	}
		1070
		1071	void
		1072	aio_group (SV *callback=&PL_sv_undef)
		1073	PROTOTYPE: ;$
		1074	PPCODE:
		1075	{
		1076	dREQ;
		1077
		1078	req->type = EIO_GROUP;
		1079
		1080	req_submit (req);
		1081	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1082	}
		1083
		1084	void
		1085	aio_nop (SV *callback=&PL_sv_undef)
		1086	ALIAS:
		1087	aio_nop = EIO_NOP
		1088	aio_sync = EIO_SYNC
		1089	PPCODE:
		1090	{
		1091	dREQ;
		1092
		1093	req->type = ix;
		1094
		1095	REQ_SEND;
		1096	}
		1097
		1098	int
		1099	aioreq_pri (int pri = 0)
		1100	PROTOTYPE: ;$
		1101	CODE:
		1102	RETVAL = next_pri;
		1103	if (items > 0)
		1104	{
		1105	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1106	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1107	next_pri = pri;
		1108	}
		1109	OUTPUT:
		1110	RETVAL
		1111
		1112	void
		1113	aioreq_nice (int nice = 0)
		1114	CODE:
		1115	nice = next_pri - nice;
		1116	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1117	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1118	next_pri = nice;
		1119
		1120	void
1040	flush()	1121	flush ()
1041	PROTOTYPE:	1122	PROTOTYPE:
1042	CODE:	1123	CODE:
1043	while (nreqs)	1124	while (eio_nreqs ())
1044	{	1125	{
1045	poll_wait ();	1126	poll_wait ();
1046	poll_cb ();	1127	poll_cb ();
1047	}	1128	}
1048		1129
1049	void	1130	int
1050	poll()	1131	poll()
1051	PROTOTYPE:	1132	PROTOTYPE:
1052	CODE:	1133	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	1134	poll_wait ();
1056	poll_cb ();	1135	RETVAL = poll_cb ();
1057	}	1136	OUTPUT:
		1137	RETVAL
1058		1138
1059	int	1139	int
1060	poll_fileno()	1140	poll_fileno()
1061	PROTOTYPE:	1141	PROTOTYPE:
1062	CODE:	1142	CODE:
…		…
1074		1154
1075	void	1155	void
1076	poll_wait()	1156	poll_wait()
1077	PROTOTYPE:	1157	PROTOTYPE:
1078	CODE:	1158	CODE:
1079	if (nreqs)
1080	poll_wait ();	1159	poll_wait ();
1081		1160
1082	int	1161	int
1083	nreqs()	1162	nreqs()
1084	PROTOTYPE:	1163	PROTOTYPE:
1085	CODE:	1164	CODE:
1086	RETVAL = nreqs;	1165	RETVAL = eio_nreqs ();
1087	OUTPUT:	1166	OUTPUT:
1088	RETVAL	1167	RETVAL
1089		1168
		1169	int
		1170	nready()
		1171	PROTOTYPE:
		1172	CODE:
		1173	RETVAL = eio_nready ();
		1174	OUTPUT:
		1175	RETVAL
		1176
		1177	int
		1178	npending()
		1179	PROTOTYPE:
		1180	CODE:
		1181	RETVAL = eio_npending ();
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	int
		1186	nthreads()
		1187	PROTOTYPE:
		1188	CODE:
		1189	RETVAL = eio_nthreads ();
		1190	OUTPUT:
		1191	RETVAL
		1192
		1193	int
		1194	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1195	PROTOTYPE: $$$$
		1196	CODE:
		1197	{
		1198	#if _XOPEN_SOURCE >= 600
		1199	RETVAL = posix_fadvise (fh, offset, length, advice);
		1200	#else
		1201	RETVAL = errno = ENOSYS;
		1202	#endif
		1203	}
		1204	OUTPUT:
		1205	RETVAL
		1206
		1207	ssize_t
		1208	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1209	PROTOTYPE: $$$$
		1210	CODE:
		1211	eio_sendfile_sync (ofh, ifh, offset, count);
		1212
		1213	void _on_next_submit (SV *cb)
		1214	CODE:
		1215	SvREFCNT_dec (on_next_submit);
		1216	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1217
		1218	PROTOTYPES: DISABLE
		1219
		1220	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1221
		1222	void
		1223	cancel (aio_req_ornot req)
		1224	CODE:
		1225	eio_cancel (req);
		1226
		1227	void
		1228	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1229	PPCODE:
		1230	{
		1231	if (GIMME_V != G_VOID)
		1232	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1233
		1234	if (items > 1)
		1235	{
		1236	SV *cb_cv = get_cb (callback);
		1237
		1238	SvREFCNT_dec (req->callback);
		1239	req->callback = SvREFCNT_inc (cb_cv);
		1240	}
		1241	}
		1242
		1243	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1244
		1245	void
		1246	add (aio_req grp, ...)
		1247	PPCODE:
		1248	{
		1249	int i;
		1250
		1251	if (grp->int1 == 2)
		1252	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1253
		1254	for (i = 1; i < items; ++i )
		1255	{
		1256	aio_req req;
		1257
		1258	if (GIMME_V != G_VOID)
		1259	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1260
		1261	req = SvAIO_REQ (ST (i));
		1262
		1263	if (req)
		1264	eio_grp_add (grp, req);
		1265	}
		1266	}
		1267
		1268	void
		1269	cancel_subs (aio_req_ornot req)
		1270	CODE:
		1271	req_cancel_subs (req);
		1272
		1273	void
		1274	result (aio_req grp, ...)
		1275	CODE:
		1276	{
		1277	int i;
		1278	AV *av;
		1279
		1280	grp->errorno = errno;
		1281
		1282	av = newAV ();
		1283	av_extend (av, items - 1);
		1284
		1285	for (i = 1; i < items; ++i )
		1286	av_push (av, newSVsv (ST (i)));
		1287
		1288	SvREFCNT_dec (grp->sv1);
		1289	grp->sv1 = (SV *)av;
		1290	}
		1291
		1292	void
		1293	errno (aio_req grp, int errorno = errno)
		1294	CODE:
		1295	grp->errorno = errorno;
		1296
		1297	void
		1298	limit (aio_req grp, int limit)
		1299	CODE:
		1300	eio_grp_limit (grp, limit);
		1301
		1302	void
		1303	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1304	CODE:
		1305	{
		1306	SvREFCNT_dec (grp->sv2);
		1307	grp->sv2 = newSVsv (callback);
		1308	grp->feed = aio_grp_feed;
		1309
		1310	if (grp->int2 <= 0)
		1311	grp->int2 = 2;
		1312
		1313	eio_grp_limit (grp, grp->int2);
		1314	}
		1315

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