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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.16 by root, Sun Jul 31 18:20:07 2005 UTC vs.
Revision 1.171 by root, Wed Aug 4 17:16:19 2010 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "autoconf/config.h"	9	#include "schmorp.h"
6		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9		16	#include <sys/statvfs.h>
10	#include <unistd.h>	17	#include <limits.h>
11	#include <fcntl.h>	18	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	19	#include <sched.h>
14		20
15	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
		22	# include <sys/mman.h>
		23	#endif
16		24
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
20		27
21	#if __ia64	28	#ifdef _WIN32
22	# 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
23	#else	66	#else
24	# define STACKSIZE 4096	67
		68	# include <sys/time.h>
		69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		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	#if _XOPEN_SOURCE < 600 || NO_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef PROT_NONE
		171	# define PROT_NONE 0
		172	#endif
		173	#ifndef PROT_READ
		174	# define PROT_READ 0
		175	#endif
		176	#ifndef PROT_WRITE
		177	# define PROT_READ 0
		178	#endif
		179	#ifndef PROT_EXEC
		180	# define PROT_EXEC 0
		181	#endif
		182
		183	#ifndef ST_NODEV
		184	# define ST_NODEV 0
		185	#endif
		186	#ifndef ST_NOEXEC
		187	# define ST_NOEXEC 0
		188	#endif
		189	#ifndef ST_SYNCHRONOUS
		190	# define ST_SYNCHRONOUS 0
		191	#endif
		192	#ifndef ST_MANDLOCK
		193	# define ST_MANDLOCK 0
		194	#endif
		195	#ifndef ST_WRITE
		196	# define ST_WRITE 0
		197	#endif
		198	#ifndef ST_APPEND
		199	# define ST_APPEND 0
		200	#endif
		201	#ifndef ST_IMMUTABLE
		202	# define ST_IMMUTABLE 0
		203	#endif
		204	#ifndef ST_NOATIME
		205	# define ST_NOATIME 0
		206	#endif
		207	#ifndef ST_NODIRATIME
		208	# define ST_NODIRATIME 0
		209	#endif
		210	#ifndef ST_RELATIME
		211	# define ST_RELATIME 0
		212	#endif
		213
		214	#ifndef MCL_CURRENT
		215	# define MCL_CURRENT 0
		216	#endif
		217	#ifndef MCL_FUTURE
		218	# define MCL_FUTURE 0
		219	#endif
		220
		221	#ifndef MAP_ANONYMOUS
		222	# ifdef MAP_ANON
		223	# define MAP_ANONYMOUS MAP_ANON
		224	# else
		225	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
25	#endif	226	# endif
		227	#endif
		228	#ifndef MAP_HUGETLB
		229	# define MAP_HUGETLB 0
		230	#endif
		231	#ifndef MAP_LOCKED
		232	# define MAP_LOCKED 0
		233	#endif
		234	#ifndef MAP_NORESERVE
		235	# define MAP_NORESERVE 0
		236	#endif
		237	#ifndef MAP_POPULATE
		238	# define MAP_POPULATE 0
		239	#endif
		240	#ifndef MAP_NONBLOCK
		241	# define MAP_NONBLOCK 0
		242	#endif
		243
		244	#ifndef PAGESIZE
		245	# define PAGESIZE sysconf (_SC_PAGESIZE)
		246	#endif
		247
		248	static int req_invoke (eio_req *req);
		249	#define EIO_FINISH(req) req_invoke (req)
		250	static void req_destroy (eio_req *grp);
		251	#define EIO_DESTROY(req) req_destroy (req)
26		252
27	enum {	253	enum {
28	REQ_QUIT,	254	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
29	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
32	REQ_FSYNC, REQ_FDATASYNC,
33	};	255	};
34		256
35	typedef struct aio_cb {	257	#include "libeio/eio.c"
36	struct aio_cb *volatile next;
37		258
38	int type;
39
40	int fd;
41	off_t offset;
42	size_t length;
43	ssize_t result;
44	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49
50	Stat_t *statdata;
51	} aio_cb;
52
53	typedef aio_cb *aio_req;	259	typedef eio_req *aio_req;
		260	typedef eio_req *aio_req_ornot;
54		261
55	static int started;	262	static SV *on_next_submit;
56	static volatile int nreqs;	263	static int next_pri = EIO_PRI_DEFAULT;
57	static int max_outstanding = 1<<30;	264	static int max_outstanding;
58	static int respipe [2];
59		265
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	266	static s_epipe respipe;
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		267
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	268	static void req_destroy (aio_req req);
65	static volatile aio_req ress, rese; /* queue start, queue end */	269	static void req_cancel (aio_req req);
66		270
67	static void	271	static void want_poll (void)
68	poll_wait ()
69	{	272	{
70	if (nreqs && !ress)	273	/* write a dummy byte to the pipe so fh becomes ready */
		274	s_epipe_signal (&respipe);
		275	}
		276
		277	static void done_poll (void)
		278	{
		279	/* read any signals sent by the worker threads */
		280	s_epipe_drain (&respipe);
		281	}
		282
		283	/* must be called at most once */
		284	static SV *req_sv (aio_req req, HV *stash)
		285	{
		286	if (!req->self)
71	{	287	{
72	fd_set rfd;	288	req->self = (SV *)newHV ();
73	FD_ZERO(&rfd);	289	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
74	FD_SET(respipe [0], &rfd);
75
76	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	290	}
78	}
79		291
80	static int	292	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
81	poll_cb ()	293	}
82	{
83	dSP;
84	int count = 0;
85	aio_req req, prv;
86		294
87	pthread_mutex_lock (&reslock);	295	static aio_req SvAIO_REQ (SV *sv)
		296	{
		297	MAGIC *mg;
88		298
89	{	299	if (!SvROK (sv)
90	/* read any signals sent by the worker threads */	300	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
91	char buf [32];	301	&& SvSTASH (SvRV (sv)) != aio_req_stash
92	while (read (respipe [0], buf, 32) > 0)	302	&& !sv_derived_from (sv, "IO::AIO::REQ")))
93	;	303	croak ("object of class IO::AIO::REQ expected");
94	}
95		304
96	req = ress;	305	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
97	ress = rese = 0;
98		306
99	pthread_mutex_unlock (&reslock);	307	return mg ? (aio_req)mg->mg_ptr : 0;
		308	}
100		309
101	while (req)	310	static void aio_grp_feed (aio_req grp)
		311	{
		312	if (grp->sv2 && SvOK (grp->sv2))
102	{	313	{
103	nreqs--;	314	dSP;
104		315
105	if (req->type == REQ_QUIT)	316	ENTER;
106	started--;	317	SAVETMPS;
107	else	318	PUSHMARK (SP);
		319	XPUSHs (req_sv (grp, aio_grp_stash));
		320	PUTBACK;
		321	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		322	SPAGAIN;
		323	FREETMPS;
		324	LEAVE;
		325	}
		326	}
		327
		328	static void req_submit (eio_req *req)
		329	{
		330	eio_submit (req);
		331
		332	if (expect_false (on_next_submit))
		333	{
		334	dSP;
		335	SV *cb = sv_2mortal (on_next_submit);
		336
		337	on_next_submit = 0;
		338
		339	PUSHMARK (SP);
		340	PUTBACK;
		341	call_sv (cb, G_DISCARD | G_EVAL);
		342	}
		343	}
		344
		345	static int req_invoke (eio_req *req)
		346	{
		347	if (req->flags & FLAG_SV2_RO_OFF)
		348	SvREADONLY_off (req->sv2);
		349
		350	if (!EIO_CANCELLED (req) && req->callback)
		351	{
		352	dSP;
		353	static SV *sv_result_cache; /* caches the result integer SV */
		354	SV *sv_result;
		355
		356	ENTER;
		357	SAVETMPS;
		358	PUSHMARK (SP);
		359	EXTEND (SP, 1);
		360
		361	/* do not recreate the result IV from scratch each time */
		362	if (expect_true (sv_result_cache))
108	{	363	{
109	int errorno = errno;	364	sv_result = sv_result_cache; sv_result_cache = 0;
110	errno = req->errorno;	365	SvIV_set (sv_result, req->result);
111
112	if (req->type == REQ_READ)
113	SvCUR_set (req->data, req->dataoffset
114	+ req->result > 0 ? req->result : 0);
115
116	if (req->data)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127
128	Safefree (req->statdata);
129	}
130
131	ENTER;
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134
135	if (req->type == REQ_OPEN)
136	{
137	/* convert fd to fh */
138	SV *fh;
139
140	PUTBACK;
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142	SPAGAIN;
143
144	fh = SvREFCNT_inc (POPs);
145
146	PUSHMARK (SP);
147	XPUSHs (sv_2mortal (fh));
148	}
149
150	if (SvOK (req->callback))
151	{
152	PUTBACK;
153	call_sv (req->callback, G_VOID | G_EVAL);
154	SPAGAIN;
155	}
156
157	LEAVE;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	prv = req;
167	req = req->next;
168	Safefree (prv);
169
170	/* TODO: croak on errors? */
171	}
172
173	return count;
174	}
175
176	static void *aio_proc(void *arg);
177
178	static void
179	start_thread (void)
180	{
181	sigset_t fullsigset, oldsigset;
182	pthread_t tid;
183	pthread_attr_t attr;
184
185	pthread_attr_init (&attr);
186	pthread_attr_setstacksize (&attr, STACKSIZE);
187	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188
189	sigfillset (&fullsigset);
190	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191
192	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
193	started++;
194
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);
196	}
197
198	static void
199	send_req (aio_req req)
200	{
201	nreqs++;
202
203	pthread_mutex_lock (&reqlock);
204
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);
217
218	while (nreqs > max_outstanding)
219	{
220	poll_wait ();
221	poll_cb ();
222	}
223	}
224
225	static void
226	end_thread (void)
227	{
228	aio_req req;
229	New (0, req, 1, aio_cb);
230	req->type = REQ_QUIT;
231
232	send_req (req);
233	}
234
235	static void *
236	aio_proc (void *thr_arg)
237	{
238	aio_req req;
239	int type;
240
241	do
242	{
243	pthread_mutex_lock (&reqlock);
244
245	for (;;)
246	{
247	req = reqs;
248
249	if (reqs)
250	{
251	reqs = reqs->next;
252	if (!reqs) reqe = 0;
253	}
254
255	if (req)
256	break;
257
258	pthread_cond_wait (&reqwait, &reqlock);
259	}
260
261	pthread_mutex_unlock (&reqlock);
262
263	errno = 0; /* strictly unnecessary */
264
265	type = req->type;
266
267	switch (type)
268	{
269	#if HAVE_PREADWRITE
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
272	#else
273	# error "pread/pwrite cannot be emulated, fix your os"
274	#endif
275
276	#if HAVE_READAHEAD
277	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
278	#else
279	// TODO: emulate
280	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
281	#endif
282
283	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
284	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
285	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
286
287	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
288	case REQ_CLOSE: req->result = close (req->fd); break;
289	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
290
291	case REQ_FDATASYNC:
292	#if HAVE_FDATASYNC
293	req->result = fdatasync (req->fd); break;
294	#endif
295	case REQ_FSYNC: req->result = fsync (req->fd); break;
296
297	case REQ_QUIT:
298	break;
299
300	default:
301	req->result = ENOSYS;
302	break;
303	}
304
305	req->errorno = errno;
306
307	pthread_mutex_lock (&reslock);
308
309	req->next = 0;
310
311	if (rese)
312	{
313	rese->next = req;
314	rese = req;
315	}	366	}
316	else	367	else
317	{	368	{
318	rese = ress = req;	369	sv_result = newSViv (req->result);
319		370	SvREADONLY_on (sv_result);
320	/* write a dummy byte to the pipe so fh becomes ready */
321	write (respipe [1], &respipe, 1);
322	}	371	}
323		372
324	pthread_mutex_unlock (&reslock);	373	switch (req->type)
		374	{
		375	case EIO_READDIR:
		376	{
		377	SV *rv = &PL_sv_undef;
		378
		379	if (req->result >= 0)
		380	{
		381	int i;
		382	char *names = (char *)req->ptr2;
		383	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		384	AV *av = newAV ();
		385
		386	av_extend (av, req->result - 1);
		387
		388	for (i = 0; i < req->result; ++i)
		389	{
		390	if (req->int1 & EIO_READDIR_DENTS)
		391	{
		392	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		393
		394	if (req->int1 & EIO_READDIR_CUSTOM2)
		395	{
		396	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		397	AV *avent = newAV ();
		398
		399	av_extend (avent, 2);
		400
		401	if (!sv_type [ent->type])
		402	{
		403	sv_type [ent->type] = newSViv (ent->type);
		404	SvREADONLY_on (sv_type [ent->type]);
		405	}
		406
		407	av_store (avent, 0, namesv);
		408	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		409	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		410
		411	av_store (av, i, newRV_noinc ((SV *)avent));
		412	}
		413	else
		414	av_store (av, i, namesv);
		415
		416	++ent;
		417	}
		418	else
		419	{
		420	SV *name = newSVpv (names, 0);
		421	av_store (av, i, name);
		422	names += SvCUR (name) + 1;
		423	}
		424	}
		425
		426	rv = sv_2mortal (newRV_noinc ((SV *)av));
		427	}
		428
		429	PUSHs (rv);
		430
		431	if (req->int1 & EIO_READDIR_CUSTOM1)
		432	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		433	}
		434	break;
		435
		436	case EIO_OPEN:
		437	{
		438	/* convert fd to fh */
		439	SV *fh = &PL_sv_undef;
		440
		441	if (req->result >= 0)
		442	{
		443	GV *gv = (GV *)sv_newmortal ();
		444	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		445	char sym [64];
		446	int symlen;
		447
		448	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		449	gv_init (gv, aio_stash, sym, symlen, 0);
		450
		451	symlen = snprintf (
		452	sym,
		453	sizeof (sym),
		454	"%s&=%d",
		455	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		456	(int)req->result
		457	);
		458
		459	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		460	fh = (SV *)gv;
		461	}
		462
		463	PUSHs (fh);
		464	}
		465	break;
		466
		467	case EIO_STATVFS:
		468	case EIO_FSTATVFS:
		469	{
		470	SV *rv = &PL_sv_undef;
		471
		472	if (req->result >= 0)
		473	{
		474	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		475	HV *hv = newHV ();
		476
		477	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		478
		479	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		480	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		481	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		482	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		483	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		484	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		485	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		486	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		487	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		488	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		489	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		490	}
		491
		492	PUSHs (rv);
		493	}
		494
		495	break;
		496
		497	case EIO_GROUP:
		498	req->int1 = 2; /* mark group as finished */
		499
		500	if (req->sv1)
		501	{
		502	int i;
		503	AV *av = (AV *)req->sv1;
		504
		505	EXTEND (SP, AvFILL (av) + 1);
		506	for (i = 0; i <= AvFILL (av); ++i)
		507	PUSHs (*av_fetch (av, i, 0));
		508	}
		509	break;
		510
		511	case EIO_NOP:
		512	case EIO_BUSY:
		513	break;
		514
		515	case EIO_READLINK:
		516	if (req->result > 0)
		517	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		518	break;
		519
		520	case EIO_STAT:
		521	case EIO_LSTAT:
		522	case EIO_FSTAT:
		523	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		524	PL_laststatval = req->result;
		525	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		526	PUSHs (sv_result);
		527	break;
		528
		529	case EIO_READ:
		530	{
		531	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		532	*SvEND (req->sv2) = 0;
		533	SvPOK_only (req->sv2);
		534	SvSETMAGIC (req->sv2);
		535	PUSHs (sv_result);
		536	}
		537	break;
		538
		539	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		540	if (req->result > 0)
		541	SvIV_set (sv_result, 0);
		542	/* FALLTHROUGH */
		543
		544	default:
		545	PUSHs (sv_result);
		546	break;
		547	}
		548
		549	errno = req->errorno;
		550
		551	PUTBACK;
		552	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		553	SPAGAIN;
		554
		555	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		556	SvREFCNT_dec (sv_result);
		557	else
		558	sv_result_cache = sv_result;
		559
		560	FREETMPS;
		561	LEAVE;
		562
		563	PUTBACK;
325	}	564	}
326	while (type != REQ_QUIT);	565
		566	return !!SvTRUE (ERRSV);
		567	}
		568
		569	static void req_destroy (aio_req req)
		570	{
		571	if (req->self)
		572	{
		573	sv_unmagic (req->self, PERL_MAGIC_ext);
		574	SvREFCNT_dec (req->self);
		575	}
		576
		577	SvREFCNT_dec (req->sv1);
		578	SvREFCNT_dec (req->sv2);
		579	SvREFCNT_dec (req->callback);
		580
		581	Safefree (req);
		582	}
		583
		584	static void req_cancel_subs (aio_req grp)
		585	{
		586	aio_req sub;
		587
		588	if (grp->type != EIO_GROUP)
		589	return;
		590
		591	SvREFCNT_dec (grp->sv2);
		592	grp->sv2 = 0;
		593
		594	eio_grp_cancel (grp);
		595	}
		596
		597	static void
		598	create_respipe (void)
		599	{
		600	if (s_epipe_renew (&respipe))
		601	croak ("IO::AIO: unable to initialize result pipe");
		602	}
		603
		604	static void poll_wait (void)
		605	{
		606	while (eio_nreqs ())
		607	{
		608	int size;
		609
		610	X_LOCK (reslock);
		611	size = res_queue.size;
		612	X_UNLOCK (reslock);
		613
		614	if (size)
		615	return;
		616
		617	etp_maybe_start_thread ();
		618
		619	s_epipe_wait (&respipe);
		620	}
		621	}
		622
		623	static int poll_cb (void)
		624	{
		625	for (;;)
		626	{
		627	int res = eio_poll ();
		628
		629	if (res > 0)
		630	croak (0);
		631
		632	if (!max_outstanding || max_outstanding > eio_nreqs ())
		633	return res;
		634
		635	poll_wait ();
		636	}
		637	}
		638
		639	static void atfork_child (void)
		640	{
		641	create_respipe ();
		642	}
		643
		644	/*****************************************************************************/
		645
		646	#if !_POSIX_MAPPED_FILES
		647	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		648	# define munmap(addr,length) (errno = ENOSYS, -1)
		649	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		650	#endif
		651
		652	#define MMAP_MAGIC PERL_MAGIC_ext
		653
		654	static int
		655	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		656	{
		657	int old_errno = errno;
		658	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		659	errno = old_errno;
		660
		661	mg->mg_obj = 0; /* just in case */
		662
		663	SvREADONLY_off (sv);
		664
		665	if (SvPVX (sv) != mg->mg_ptr)
		666	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		667
		668	SvCUR_set (sv, 0);
		669	SvPVX (sv) = 0;
		670	SvOK_off (sv);
327		671
328	return 0;	672	return 0;
329	}	673	}
330		674
		675	static MGVTBL mmap_vtbl = {
		676	0, 0, 0, 0, mmap_free
		677	};
		678
		679	/*****************************************************************************/
		680
		681	static SV *
		682	get_cb (SV *cb_sv)
		683	{
		684	SvGETMAGIC (cb_sv);
		685	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		686	}
		687
		688	#define dREQ \
		689	SV *cb_cv; \
		690	aio_req req; \
		691	int req_pri = next_pri; \
		692	next_pri = EIO_PRI_DEFAULT; \
		693	\
		694	cb_cv = get_cb (callback); \
		695	\
		696	Newz (0, req, 1, eio_req); \
		697	if (!req) \
		698	croak ("out of memory during eio_req allocation"); \
		699	\
		700	req->callback = SvREFCNT_inc (cb_cv); \
		701	req->pri = req_pri
		702
		703	#define REQ_SEND \
		704	PUTBACK; \
		705	req_submit (req); \
		706	SPAGAIN; \
		707	\
		708	if (GIMME_V != G_VOID) \
		709	XPUSHs (req_sv (req, aio_req_stash));
		710
331	MODULE = IO::AIO PACKAGE = IO::AIO	711	MODULE = IO::AIO PACKAGE = IO::AIO
332		712
333	PROTOTYPES: ENABLE	713	PROTOTYPES: ENABLE
334		714
335	BOOT:	715	BOOT:
336	{	716	{
337	if (pipe (respipe))	717	static const struct {
338	croak ("unable to initialize result pipe");	718	const char *name;
		719	IV iv;
		720	} *civ, const_iv[] = {
		721	# define const_niv(name, value) { # name, (IV) value },
		722	# define const_iv(name) { # name, (IV) name },
		723	# define const_eio(name) { # name, (IV) EIO_ ## name },
		724	const_iv (EXDEV)
		725	const_iv (ENOSYS)
		726	const_iv (O_RDONLY)
		727	const_iv (O_WRONLY)
		728	const_iv (O_RDWR)
		729	const_iv (O_CREAT)
		730	const_iv (O_TRUNC)
		731	const_iv (O_EXCL)
		732	const_iv (O_APPEND)
		733	#ifndef _WIN32
		734	const_iv (S_IFIFO)
		735	#endif
		736	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		737	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		738	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		739	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		740	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		741	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
339		742
340	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	743	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
341	croak ("cannot set result pipe to nonblocking mode");	744	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		745	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		746	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		747	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
342		748
343	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	749	const_iv (ST_RDONLY)
344	croak ("cannot set result pipe to nonblocking mode");	750	const_iv (ST_NOSUID)
345	}	751	const_iv (ST_NODEV)
		752	const_iv (ST_NOEXEC)
		753	const_iv (ST_SYNCHRONOUS)
		754	const_iv (ST_MANDLOCK)
		755	const_iv (ST_WRITE)
		756	const_iv (ST_APPEND)
		757	const_iv (ST_IMMUTABLE)
		758	const_iv (ST_NOATIME)
		759	const_iv (ST_NODIRATIME)
		760	const_iv (ST_RELATIME)
346		761
		762	const_iv (PROT_NONE)
		763	const_iv (PROT_EXEC)
		764	const_iv (PROT_READ)
		765	const_iv (PROT_WRITE)
		766
		767	/*const_iv (MAP_FIXED)*/
		768	const_iv (MAP_PRIVATE)
		769	const_iv (MAP_SHARED)
		770	const_iv (MAP_ANONYMOUS)
		771
		772	/* linuxish */
		773	const_iv (MAP_HUGETLB)
		774	const_iv (MAP_LOCKED)
		775	const_iv (MAP_NORESERVE)
		776	const_iv (MAP_POPULATE)
		777	const_iv (MAP_NONBLOCK)
		778
		779	const_iv (MCL_FUTURE)
		780	const_iv (MCL_CURRENT)
		781
		782	const_eio (MS_ASYNC)
		783	const_eio (MS_INVALIDATE)
		784	const_eio (MS_SYNC)
		785
		786	const_eio (MT_MODIFY)
		787
		788	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		789	const_eio (SYNC_FILE_RANGE_WRITE)
		790	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		791
		792	const_eio (READDIR_DENTS)
		793	const_eio (READDIR_DIRS_FIRST)
		794	const_eio (READDIR_STAT_ORDER)
		795	const_eio (READDIR_FOUND_UNKNOWN)
		796
		797	const_eio (DT_UNKNOWN)
		798	const_eio (DT_FIFO)
		799	const_eio (DT_CHR)
		800	const_eio (DT_DIR)
		801	const_eio (DT_BLK)
		802	const_eio (DT_REG)
		803	const_eio (DT_LNK)
		804	const_eio (DT_SOCK)
		805	const_eio (DT_WHT)
		806	};
		807
		808	aio_stash = gv_stashpv ("IO::AIO" , 1);
		809	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		810	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		811
		812	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		813	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		814
		815	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		816
		817	create_respipe ();
		818
		819	if (eio_init (want_poll, done_poll) < 0)
		820	croak ("IO::AIO: unable to initialise eio library");
		821
		822	/* atfork child called in fifo order, so before eio's handler */
		823	X_THREAD_ATFORK (0, 0, atfork_child);
		824	}
		825
347	void	826	void
348	min_parallel(nthreads)	827	max_poll_reqs (int nreqs)
349	int nthreads
350	PROTOTYPE: $	828	PROTOTYPE: $
351	CODE:	829	CODE:
352	while (nthreads > started)	830	eio_set_max_poll_reqs (nreqs);
353	start_thread ();
354		831
355	void	832	void
356	max_parallel(nthreads)	833	max_poll_time (double nseconds)
357	int nthreads
358	PROTOTYPE: $	834	PROTOTYPE: $
359	CODE:	835	CODE:
		836	eio_set_max_poll_time (nseconds);
		837
		838	void
		839	min_parallel (int nthreads)
		840	PROTOTYPE: $
		841	CODE:
		842	eio_set_min_parallel (nthreads);
		843
		844	void
		845	max_parallel (int nthreads)
		846	PROTOTYPE: $
		847	CODE:
		848	eio_set_max_parallel (nthreads);
		849
		850	void
		851	max_idle (int nthreads)
		852	PROTOTYPE: $
		853	CODE:
		854	eio_set_max_idle (nthreads);
		855
		856	void
		857	max_outstanding (int maxreqs)
		858	PROTOTYPE: $
		859	CODE:
		860	max_outstanding = maxreqs;
		861
		862	void
		863	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		864	PROTOTYPE: $$$;$
		865	PPCODE:
360	{	866	{
361	int cur = started;	867	dREQ;
362	while (cur > nthreads)	868
363	{	869	req->type = EIO_OPEN;
364	end_thread ();	870	req->sv1 = newSVsv (pathname);
365	cur--;	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
		872	req->int1 = flags;
		873	req->int2 = mode;
		874
		875	REQ_SEND;
		876	}
		877
		878	void
		879	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		880	PROTOTYPE: $;$
		881	ALIAS:
		882	aio_fsync = EIO_FSYNC
		883	aio_fdatasync = EIO_FDATASYNC
		884	PPCODE:
		885	{
		886	int fd = s_fileno_croak (fh, 0);
		887	dREQ;
		888
		889	req->type = ix;
		890	req->sv1 = newSVsv (fh);
		891	req->int1 = fd;
		892
		893	REQ_SEND (req);
		894	}
		895
		896	void
		897	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		898	PROTOTYPE: $$$$;$
		899	PPCODE:
		900	{
		901	int fd = s_fileno_croak (fh, 0);
		902	dREQ;
		903
		904	req->type = EIO_SYNC_FILE_RANGE;
		905	req->sv1 = newSVsv (fh);
		906	req->int1 = fd;
		907	req->offs = offset;
		908	req->size = nbytes;
		909	req->int2 = flags;
		910
		911	REQ_SEND (req);
		912	}
		913
		914	void
		915	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		916	PROTOTYPE: $;$
		917	PPCODE:
		918	{
		919	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		920	int fd = s_fileno_croak (fh, 0);
		921	dREQ;
		922
		923	if (close_pipe < 0)
		924	{
		925	int pipefd [2];
		926
		927	if (pipe (pipefd) < 0
		928	|| close (pipefd [1]) < 0
		929	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		930	abort (); /*D*/
		931
		932	close_pipe = pipefd [0];
366	}	933	}
367		934
368	while (started > nthreads)	935	req->type = EIO_DUP2;
		936	req->int1 = close_pipe;
		937	req->sv2 = newSVsv (fh);
		938	req->int2 = fd;
		939
		940	REQ_SEND (req);
		941	}
		942
		943	void
		944	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		945	ALIAS:
		946	aio_read = EIO_READ
		947	aio_write = EIO_WRITE
		948	PROTOTYPE: $$$$$;$
		949	PPCODE:
		950	{
		951	STRLEN svlen;
		952	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		953	char *svptr = SvPVbyte (data, svlen);
		954	UV len = SvUV (length);
		955
		956	if (dataoffset < 0)
		957	dataoffset += svlen;
		958
		959	if (dataoffset < 0 || dataoffset > svlen)
		960	croak ("dataoffset outside of data scalar");
		961
		962	if (ix == EIO_WRITE)
		963	{
		964	/* write: check length and adjust. */
		965	if (!SvOK (length) || len + dataoffset > svlen)
		966	len = svlen - dataoffset;
		967	}
		968	else
		969	{
		970	/* read: check type and grow scalar as necessary */
		971	SvUPGRADE (data, SVt_PV);
		972	svptr = SvGROW (data, len + dataoffset + 1);
		973	}
		974
		975	{
		976	dREQ;
		977
		978	req->type = ix;
		979	req->sv1 = newSVsv (fh);
		980	req->int1 = fd;
		981	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		982	req->size = len;
		983	req->sv2 = SvREFCNT_inc (data);
		984	req->ptr2 = (char *)svptr + dataoffset;
		985	req->stroffset = dataoffset;
		986
		987	if (!SvREADONLY (data))
		988	{
		989	SvREADONLY_on (data);
		990	req->flags |= FLAG_SV2_RO_OFF;
		991	}
		992
		993	REQ_SEND;
		994	}
		995	}
		996
		997	void
		998	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		999	PROTOTYPE: $$;$
		1000	PPCODE:
		1001	{
		1002	SV *data;
		1003	dREQ;
		1004
		1005	req->type = EIO_READLINK;
		1006	req->sv1 = newSVsv (path);
		1007	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1008
		1009	REQ_SEND;
		1010	}
		1011
		1012	void
		1013	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1014	PROTOTYPE: $$$$;$
		1015	PPCODE:
		1016	{
		1017	int ifd = s_fileno_croak (in_fh , 0);
		1018	int ofd = s_fileno_croak (out_fh, 1);
		1019	dREQ;
		1020
		1021	req->type = EIO_SENDFILE;
		1022	req->sv1 = newSVsv (out_fh);
		1023	req->int1 = ofd;
		1024	req->sv2 = newSVsv (in_fh);
		1025	req->int2 = ifd;
		1026	req->offs = in_offset;
		1027	req->size = length;
		1028
		1029	REQ_SEND;
		1030	}
		1031
		1032	void
		1033	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1034	PROTOTYPE: $$$;$
		1035	PPCODE:
		1036	{
		1037	int fd = s_fileno_croak (fh, 0);
		1038	dREQ;
		1039
		1040	req->type = EIO_READAHEAD;
		1041	req->sv1 = newSVsv (fh);
		1042	req->int1 = fd;
		1043	req->offs = offset;
		1044	req->size = length;
		1045
		1046	REQ_SEND;
		1047	}
		1048
		1049	void
		1050	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1051	ALIAS:
		1052	aio_stat = EIO_STAT
		1053	aio_lstat = EIO_LSTAT
		1054	aio_statvfs = EIO_STATVFS
		1055	PPCODE:
		1056	{
		1057	dREQ;
		1058
		1059	req->sv1 = newSVsv (fh_or_path);
		1060
		1061	if (SvPOK (req->sv1))
		1062	{
		1063	req->type = ix;
		1064	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1065	}
		1066	else
		1067	{
		1068	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1069	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1070	}
		1071
		1072	REQ_SEND;
		1073	}
		1074
		1075	void
		1076	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1082	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1083	req->sv1 = newSVsv (fh_or_path);
		1084
		1085	if (SvPOK (req->sv1))
		1086	{
		1087	req->type = EIO_UTIME;
		1088	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1089	}
		1090	else
		1091	{
		1092	req->type = EIO_FUTIME;
		1093	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1094	}
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	void
		1100	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1101	PPCODE:
		1102	{
		1103	dREQ;
		1104
		1105	req->sv1 = newSVsv (fh_or_path);
		1106	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1107
		1108	if (SvPOK (req->sv1))
		1109	{
		1110	req->type = EIO_TRUNCATE;
		1111	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1112	}
		1113	else
		1114	{
		1115	req->type = EIO_FTRUNCATE;
		1116	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1117	}
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1124	ALIAS:
		1125	aio_chmod = EIO_CHMOD
		1126	aio_mkdir = EIO_MKDIR
		1127	PPCODE:
		1128	{
		1129	dREQ;
		1130
		1131	req->int2 = mode;
		1132	req->sv1 = newSVsv (fh_or_path);
		1133
		1134	if (SvPOK (req->sv1))
		1135	{
		1136	req->type = ix;
		1137	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1138	}
		1139	else
		1140	{
		1141	req->type = EIO_FCHMOD;
		1142	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1143	}
		1144
		1145	REQ_SEND;
		1146	}
		1147
		1148	void
		1149	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1150	PPCODE:
		1151	{
		1152	dREQ;
		1153
		1154	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1155	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1156	req->sv1 = newSVsv (fh_or_path);
		1157
		1158	if (SvPOK (req->sv1))
		1159	{
		1160	req->type = EIO_CHOWN;
		1161	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1162	}
		1163	else
		1164	{
		1165	req->type = EIO_FCHOWN;
		1166	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1167	}
		1168
		1169	REQ_SEND;
		1170	}
		1171
		1172	void
		1173	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1174	PPCODE:
		1175	{
		1176	dREQ;
		1177
		1178	req->type = EIO_READDIR;
		1179	req->sv1 = newSVsv (pathname);
		1180	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1181	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1182
		1183	if (flags & EIO_READDIR_DENTS)
		1184	req->int1 |= EIO_READDIR_CUSTOM2;
		1185
		1186	REQ_SEND;
		1187	}
		1188
		1189	void
		1190	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1191	ALIAS:
		1192	aio_unlink = EIO_UNLINK
		1193	aio_rmdir = EIO_RMDIR
		1194	aio_readdir = EIO_READDIR
		1195	PPCODE:
		1196	{
		1197	dREQ;
		1198
		1199	req->type = ix;
		1200	req->sv1 = newSVsv (pathname);
		1201	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1202
		1203	REQ_SEND;
		1204	}
		1205
		1206	void
		1207	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1208	ALIAS:
		1209	aio_link = EIO_LINK
		1210	aio_symlink = EIO_SYMLINK
		1211	aio_rename = EIO_RENAME
		1212	PPCODE:
		1213	{
		1214	dREQ;
		1215
		1216	req->type = ix;
		1217	req->sv1 = newSVsv (oldpath);
		1218	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1219	req->sv2 = newSVsv (newpath);
		1220	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1221
		1222	REQ_SEND;
		1223	}
		1224
		1225	void
		1226	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1227	PPCODE:
		1228	{
		1229	dREQ;
		1230
		1231	req->type = EIO_MKNOD;
		1232	req->sv1 = newSVsv (pathname);
		1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1234	req->int2 = (mode_t)mode;
		1235	req->offs = dev;
		1236
		1237	REQ_SEND;
		1238	}
		1239
		1240	void
		1241	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1242	ALIAS:
		1243	aio_mtouch = EIO_MTOUCH
		1244	aio_msync = EIO_MSYNC
		1245	PROTOTYPE: $$$$;$
		1246	PPCODE:
		1247	{
		1248	STRLEN svlen;
		1249	UV len = SvUV (length);
		1250	char *svptr = SvPVbyte (data, svlen);
		1251
		1252	if (offset < 0)
		1253	offset += svlen;
		1254
		1255	if (offset < 0 || offset > svlen)
		1256	croak ("offset outside of scalar");
		1257
		1258	if (!SvOK (length) || len + offset > svlen)
		1259	len = svlen - offset;
		1260
		1261	{
		1262	dREQ;
		1263
		1264	req->type = ix;
		1265	req->size = len;
		1266	req->sv2 = SvREFCNT_inc (data);
		1267	req->ptr2 = (char *)svptr + offset;
		1268	req->int1 = flags;
		1269
		1270	REQ_SEND;
		1271	}
		1272	}
		1273
		1274	void
		1275	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1276	PPCODE:
		1277	{
		1278	dREQ;
		1279
		1280	req->type = EIO_BUSY;
		1281	req->nv1 = delay < 0. ? 0. : delay;
		1282
		1283	REQ_SEND;
		1284	}
		1285
		1286	void
		1287	aio_group (SV *callback=&PL_sv_undef)
		1288	PROTOTYPE: ;$
		1289	PPCODE:
		1290	{
		1291	dREQ;
		1292
		1293	req->type = EIO_GROUP;
		1294
		1295	req_submit (req);
		1296	XPUSHs (req_sv (req, aio_grp_stash));
		1297	}
		1298
		1299	void
		1300	aio_nop (SV *callback=&PL_sv_undef)
		1301	ALIAS:
		1302	aio_nop = EIO_NOP
		1303	aio_sync = EIO_SYNC
		1304	PPCODE:
		1305	{
		1306	dREQ;
		1307
		1308	req->type = ix;
		1309
		1310	REQ_SEND;
		1311	}
		1312
		1313	int
		1314	aioreq_pri (int pri = 0)
		1315	PROTOTYPE: ;$
		1316	CODE:
		1317	RETVAL = next_pri;
		1318	if (items > 0)
		1319	{
		1320	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1321	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1322	next_pri = pri;
		1323	}
		1324	OUTPUT:
		1325	RETVAL
		1326
		1327	void
		1328	aioreq_nice (int nice = 0)
		1329	CODE:
		1330	nice = next_pri - nice;
		1331	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1332	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1333	next_pri = nice;
		1334
		1335	void
		1336	flush ()
		1337	PROTOTYPE:
		1338	CODE:
		1339	while (eio_nreqs ())
369	{	1340	{
370	poll_wait ();	1341	poll_wait ();
371	poll_cb ();	1342	poll_cb ();
372	}	1343	}
373	}
374		1344
375	int	1345	int
376	max_outstanding(nreqs)
377	int nreqs
378	PROTOTYPE: $
379	CODE:
380	RETVAL = max_outstanding;
381	max_outstanding = nreqs;
382
383	void
384	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
385	SV * pathname
386	int flags
387	int mode
388	SV * callback
389	PROTOTYPE: $$$;$
390	CODE:
391	{
392	aio_req req;
393
394	Newz (0, req, 1, aio_cb);
395
396	if (!req)
397	croak ("out of memory during aio_req allocation");
398
399	req->type = REQ_OPEN;
400	req->data = newSVsv (pathname);
401	req->dataptr = SvPV_nolen (req->data);
402	req->fd = flags;
403	req->mode = mode;
404	req->callback = SvREFCNT_inc (callback);
405
406	send_req (req);
407	}
408
409	void
410	aio_close(fh,callback=&PL_sv_undef)
411	SV * fh
412	SV * callback
413	PROTOTYPE: $;$
414	ALIAS:
415	aio_close = REQ_CLOSE
416	aio_fsync = REQ_FSYNC
417	aio_fdatasync = REQ_FDATASYNC
418	CODE:
419	{
420	aio_req req;
421
422	Newz (0, req, 1, aio_cb);
423
424	if (!req)
425	croak ("out of memory during aio_req allocation");
426
427	req->type = ix;
428	req->fh = newSVsv (fh);
429	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
430	req->callback = SvREFCNT_inc (callback);
431
432	send_req (req);
433	}
434
435	void
436	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
437	SV * fh
438	UV offset
439	IV length
440	SV * data
441	IV dataoffset
442	SV * callback
443	ALIAS:
444	aio_read = REQ_READ
445	aio_write = REQ_WRITE
446	PROTOTYPE: $$$$$;$
447	CODE:
448	{
449	aio_req req;
450	STRLEN svlen;
451	char *svptr = SvPV (data, svlen);
452
453	SvUPGRADE (data, SVt_PV);
454	SvPOK_on (data);
455
456	if (dataoffset < 0)
457	dataoffset += svlen;
458
459	if (dataoffset < 0 || dataoffset > svlen)
460	croak ("data offset outside of string");
461
462	if (ix == REQ_WRITE)
463	{
464	/* write: check length and adjust. */
465	if (length < 0 || length + dataoffset > svlen)
466	length = svlen - dataoffset;
467	}
468	else
469	{
470	/* read: grow scalar as necessary */
471	svptr = SvGROW (data, length + dataoffset);
472	}
473
474	if (length < 0)
475	croak ("length must not be negative");
476
477	Newz (0, req, 1, aio_cb);
478
479	if (!req)
480	croak ("out of memory during aio_req allocation");
481
482	req->type = ix;
483	req->fh = newSVsv (fh);
484	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
485	: IoOFP (sv_2io (fh)));
486	req->offset = offset;
487	req->length = length;
488	req->data = SvREFCNT_inc (data);
489	req->dataptr = (char *)svptr + dataoffset;
490	req->callback = SvREFCNT_inc (callback);
491
492	send_req (req);
493	}
494
495	void
496	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
497	SV * fh
498	UV offset
499	IV length
500	SV * callback
501	PROTOTYPE: $$$;$
502	CODE:
503	{
504	aio_req req;
505
506	if (length < 0)
507	croak ("length must not be negative");
508
509	Newz (0, req, 1, aio_cb);
510
511	if (!req)
512	croak ("out of memory during aio_req allocation");
513
514	req->type = REQ_READAHEAD;
515	req->fh = newSVsv (fh);
516	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
517	req->offset = offset;
518	req->length = length;
519	req->callback = SvREFCNT_inc (callback);
520
521	send_req (req);
522	}
523
524	void
525	aio_stat(fh_or_path,callback=&PL_sv_undef)
526	SV * fh_or_path
527	SV * callback
528	ALIAS:
529	aio_stat = REQ_STAT
530	aio_lstat = REQ_LSTAT
531	CODE:
532	{
533	aio_req req;
534
535	Newz (0, req, 1, aio_cb);
536
537	if (!req)
538	croak ("out of memory during aio_req allocation");
539
540	New (0, req->statdata, 1, Stat_t);
541
542	if (!req->statdata)
543	croak ("out of memory during aio_req->statdata allocation");
544
545	if (SvPOK (fh_or_path))
546	{
547	req->type = ix;
548	req->data = newSVsv (fh_or_path);
549	req->dataptr = SvPV_nolen (req->data);
550	}
551	else
552	{
553	req->type = REQ_FSTAT;
554	req->fh = newSVsv (fh_or_path);
555	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
556	}
557
558	req->callback = SvREFCNT_inc (callback);
559
560	send_req (req);
561	}
562
563	void
564	aio_unlink(pathname,callback=&PL_sv_undef)
565	SV * pathname
566	SV * callback
567	CODE:
568	{
569	aio_req req;
570
571	Newz (0, req, 1, aio_cb);
572
573	if (!req)
574	croak ("out of memory during aio_req allocation");
575
576	req->type = REQ_UNLINK;
577	req->data = newSVsv (pathname);
578	req->dataptr = SvPV_nolen (req->data);
579	req->callback = SvREFCNT_inc (callback);
580
581	send_req (req);
582	}
583
584	void
585	flush()
586	PROTOTYPE:
587	CODE:
588	while (nreqs)
589	{
590	poll_wait ();
591	poll_cb ();
592	}
593
594	void
595	poll()	1346	poll()
596	PROTOTYPE:	1347	PROTOTYPE:
597	CODE:	1348	CODE:
598	if (nreqs)
599	{
600	poll_wait ();	1349	poll_wait ();
601	poll_cb ();	1350	RETVAL = poll_cb ();
602	}	1351	OUTPUT:
		1352	RETVAL
603		1353
604	int	1354	int
605	poll_fileno()	1355	poll_fileno()
606	PROTOTYPE:	1356	PROTOTYPE:
607	CODE:	1357	CODE:
608	RETVAL = respipe [0];	1358	RETVAL = s_epipe_fd (&respipe);
609	OUTPUT:	1359	OUTPUT:
610	RETVAL	1360	RETVAL
611		1361
612	int	1362	int
613	poll_cb(...)	1363	poll_cb(...)
…		…
619		1369
620	void	1370	void
621	poll_wait()	1371	poll_wait()
622	PROTOTYPE:	1372	PROTOTYPE:
623	CODE:	1373	CODE:
624	if (nreqs)
625	poll_wait ();	1374	poll_wait ();
626		1375
627	int	1376	int
628	nreqs()	1377	nreqs()
629	PROTOTYPE:	1378	PROTOTYPE:
630	CODE:	1379	CODE:
631	RETVAL = nreqs;	1380	RETVAL = eio_nreqs ();
632	OUTPUT:	1381	OUTPUT:
633	RETVAL	1382	RETVAL
634		1383
		1384	int
		1385	nready()
		1386	PROTOTYPE:
		1387	CODE:
		1388	RETVAL = eio_nready ();
		1389	OUTPUT:
		1390	RETVAL
		1391
		1392	int
		1393	npending()
		1394	PROTOTYPE:
		1395	CODE:
		1396	RETVAL = eio_npending ();
		1397	OUTPUT:
		1398	RETVAL
		1399
		1400	int
		1401	nthreads()
		1402	PROTOTYPE:
		1403	CODE:
		1404	RETVAL = eio_nthreads ();
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1410	PROTOTYPE: $$$$
		1411	CODE:
		1412	RETVAL = posix_fadvise (fh, offset, length, advice);
		1413	OUTPUT:
		1414	RETVAL
		1415
		1416	ssize_t
		1417	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1418	PROTOTYPE: $$$$
		1419	CODE:
		1420	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void
		1425	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1426	PROTOTYPE: $$$$$;$
		1427	PPCODE:
		1428	sv_unmagic (scalar, MMAP_MAGIC);
		1429	{
		1430	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1431	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1432	if (addr == (void *)-1)
		1433	XSRETURN_NO;
		1434
		1435	sv_force_normal (scalar);
		1436
		1437	/* we store the length in mg_obj, as namlen is I32 :/ */
		1438	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1439	->mg_obj = (SV *)length;
		1440
		1441	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1442
		1443	if (!(prot & PROT_WRITE))
		1444	SvREADONLY_on (scalar);
		1445
		1446	if (SvLEN (scalar))
		1447	Safefree (SvPVX (scalar));
		1448
		1449	SvPVX (scalar) = (char *)addr;
		1450	SvCUR_set (scalar, length);
		1451	SvLEN_set (scalar, 0);
		1452	SvPOK_only (scalar);
		1453
		1454	XSRETURN_YES;
		1455	}
		1456
		1457	void
		1458	munmap (SV *scalar)
		1459	PROTOTYPE: $
		1460	CODE:
		1461	sv_unmagic (scalar, MMAP_MAGIC);
		1462
		1463	int
		1464	madvise (SV *scalar, off_t offset, off_t length, IV advice_or_prot)
		1465	ALIAS:
		1466	mprotect = 1
		1467	PROTOTYPE: $$$$
		1468	CODE:
		1469	{
		1470	STRLEN cur;
		1471	char *addr = SvPVbyte (scalar, cur);
		1472
		1473	if (offset > cur)
		1474	RETVAL = errno = EFAULT;
		1475	else
		1476	{
		1477	if (!SvOK (ST (2)))
		1478	length = cur - offset;
		1479
		1480	if (offset + length > cur)
		1481	RETVAL = errno = EFAULT;
		1482	else
		1483	switch (ix)
		1484	{
		1485	case 0: RETVAL = posix_madvise (addr + offset, length, advice_or_prot); break;
		1486	case 1: RETVAL = mprotect (addr + offset, length, advice_or_prot); break;
		1487	}
		1488	}
		1489	}
		1490	OUTPUT:
		1491	RETVAL
		1492
		1493	int
		1494	mlockall (int flags)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	#if _POSIX_MEMLOCK
		1498	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1499	extern int mallopt (int, int);
		1500	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1501	#endif
		1502	mlockall (flags);
		1503	#else
		1504	RETVAL = -1;
		1505	errno = ENOSYS;
		1506	#endif
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	munlockall ()
		1512	PROTOTYPE:
		1513	CODE:
		1514	#if _POSIX_MEMLOCK
		1515	munlockall ();
		1516	#else
		1517	RETVAL = -1;
		1518	errno = ENOSYS;
		1519	#endif
		1520	OUTPUT:
		1521	RETVAL
		1522
		1523	void _on_next_submit (SV *cb)
		1524	CODE:
		1525	SvREFCNT_dec (on_next_submit);
		1526	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1527
		1528	PROTOTYPES: DISABLE
		1529
		1530	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1531
		1532	void
		1533	cancel (aio_req_ornot req)
		1534	CODE:
		1535	eio_cancel (req);
		1536
		1537	void
		1538	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1539	PPCODE:
		1540	{
		1541	if (GIMME_V != G_VOID)
		1542	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1543
		1544	if (items > 1)
		1545	{
		1546	SV *cb_cv =get_cb (callback);
		1547
		1548	SvREFCNT_dec (req->callback);
		1549	req->callback = SvREFCNT_inc (cb_cv);
		1550	}
		1551	}
		1552
		1553	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1554
		1555	void
		1556	add (aio_req grp, ...)
		1557	PPCODE:
		1558	{
		1559	int i;
		1560
		1561	if (grp->int1 == 2)
		1562	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1563
		1564	for (i = 1; i < items; ++i )
		1565	{
		1566	aio_req req;
		1567
		1568	if (GIMME_V != G_VOID)
		1569	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1570
		1571	req = SvAIO_REQ (ST (i));
		1572
		1573	if (req)
		1574	eio_grp_add (grp, req);
		1575	}
		1576	}
		1577
		1578	void
		1579	cancel_subs (aio_req_ornot req)
		1580	CODE:
		1581	req_cancel_subs (req);
		1582
		1583	void
		1584	result (aio_req grp, ...)
		1585	CODE:
		1586	{
		1587	int i;
		1588	AV *av;
		1589
		1590	grp->errorno = errno;
		1591
		1592	av = newAV ();
		1593	av_extend (av, items - 1);
		1594
		1595	for (i = 1; i < items; ++i )
		1596	av_push (av, newSVsv (ST (i)));
		1597
		1598	SvREFCNT_dec (grp->sv1);
		1599	grp->sv1 = (SV *)av;
		1600	}
		1601
		1602	void
		1603	errno (aio_req grp, int errorno = errno)
		1604	CODE:
		1605	grp->errorno = errorno;
		1606
		1607	void
		1608	limit (aio_req grp, int limit)
		1609	CODE:
		1610	eio_grp_limit (grp, limit);
		1611
		1612	void
		1613	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1614	CODE:
		1615	{
		1616	SvREFCNT_dec (grp->sv2);
		1617	grp->sv2 = newSVsv (callback);
		1618	grp->feed = aio_grp_feed;
		1619
		1620	if (grp->int2 <= 0)
		1621	grp->int2 = 2;
		1622
		1623	eio_grp_limit (grp, grp->int2);
		1624	}
		1625

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