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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.19 by root, Sun Jul 31 19:04:45 2005 UTC vs.
Revision 1.167 by root, Sun May 9 20:49:52 2010 UTC

1	#ifndef _REENTRANT	1	#include "libeio/xthread.h"
2	# define _REENTRANT 1	2
3	#endif
4	#include <errno.h>	3	#include <errno.h>
5		4
6	#include "EXTERN.h"	5	#include "EXTERN.h"
7	#include "perl.h"	6	#include "perl.h"
8	#include "XSUB.h"	7	#include "XSUB.h"
9		8
10	#include "autoconf/config.h"	9	#include "schmorp.h"
11		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14		16	#include <sys/statvfs.h>
15	#include <unistd.h>	17	#include <limits.h>
16	#include <fcntl.h>	18	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	19	#include <sched.h>
19		20
20	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
		22	# include <sys/mman.h>
		23	#endif
21		24
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
25		27
26	#if __ia64	28	#ifdef _WIN32
27	# 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
28	#else	66	#else
29	# 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	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
		186	# else
		187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
30	#endif	188	# endif
		189	#endif
		190	#ifndef MAP_HUGETLB
		191	# define MAP_HUGETLB 0
		192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
		195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
		205
		206	#ifndef PAGESIZE
		207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
		209
		210	static int req_invoke (eio_req *req);
		211	#define EIO_FINISH(req) req_invoke (req)
		212	static void req_destroy (eio_req *grp);
		213	#define EIO_DESTROY(req) req_destroy (req)
31		214
32	enum {	215	enum {
33	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
34	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
37	REQ_FSYNC, REQ_FDATASYNC,
38	};	217	};
39		218
40	typedef struct aio_cb {	219	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		220
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
		222	typedef eio_req *aio_req_ornot;
59		223
60	static int started;	224	static SV *on_next_submit;
61	static volatile int nreqs;	225	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	226	static int max_outstanding;
63	static int respipe [2];
64		227
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		229
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */	231	static void req_cancel (aio_req req);
71		232
72	static void	233	static void want_poll (void)
73	poll_wait ()
74	{	234	{
75	if (nreqs && !ress)	235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
		245	/* must be called at most once */
		246	static SV *req_sv (aio_req req, HV *stash)
		247	{
		248	if (!req->self)
76	{	249	{
77	fd_set rfd;	250	req->self = (SV *)newHV ();
78	FD_ZERO(&rfd);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	252	}
83	}
84		253
85	static int	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
86	poll_cb ()	255	}
87	{
88	dSP;
89	int count = 0;
90	aio_req req, prv;
91		256
92	pthread_mutex_lock (&reslock);	257	static aio_req SvAIO_REQ (SV *sv)
		258	{
		259	MAGIC *mg;
93		260
94	{	261	if (!SvROK (sv)
95	/* read any signals sent by the worker threads */	262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
96	char buf [32];	263	&& SvSTASH (SvRV (sv)) != aio_req_stash
97	while (read (respipe [0], buf, 32) > 0)	264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
98	;	265	croak ("object of class IO::AIO::REQ expected");
99	}
100		266
101	req = ress;	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
102	ress = rese = 0;
103		268
104	pthread_mutex_unlock (&reslock);	269	return mg ? (aio_req)mg->mg_ptr : 0;
		270	}
105		271
106	while (req)	272	static void aio_grp_feed (aio_req grp)
		273	{
		274	if (grp->sv2 && SvOK (grp->sv2))
107	{	275	{
108	nreqs--;	276	dSP;
109		277
110	if (req->type == REQ_QUIT)	278	ENTER;
111	started--;	279	SAVETMPS;
112	else	280	PUSHMARK (SP);
		281	XPUSHs (req_sv (grp, aio_grp_stash));
		282	PUTBACK;
		283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		284	SPAGAIN;
		285	FREETMPS;
		286	LEAVE;
		287	}
		288	}
		289
		290	static void req_submit (eio_req *req)
		291	{
		292	eio_submit (req);
		293
		294	if (expect_false (on_next_submit))
		295	{
		296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
		304	}
		305	}
		306
		307	static int req_invoke (eio_req *req)
		308	{
		309	if (req->flags & FLAG_SV2_RO_OFF)
		310	SvREADONLY_off (req->sv2);
		311
		312	if (!EIO_CANCELLED (req) && req->callback)
		313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
		318	ENTER;
		319	SAVETMPS;
		320	PUSHMARK (SP);
		321	EXTEND (SP, 1);
		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
113	{	325	{
114	int errorno = errno;	326	sv_result = sv_result_cache; sv_result_cache = 0;
115	errno = req->errorno;	327	SvIV_set (sv_result, req->result);
116
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132
133	Safefree (req->statdata);
134	}
135
136	ENTER;
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{
142	/* convert fd to fh */
143	SV *fh;
144
145	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147	SPAGAIN;
148
149	fh = SvREFCNT_inc (POPs);
150
151	PUSHMARK (SP);
152	XPUSHs (sv_2mortal (fh));
153	}
154
155	if (SvOK (req->callback))
156	{
157	PUTBACK;
158	call_sv (req->callback, G_VOID | G_EVAL);
159	SPAGAIN;
160	}
161
162	LEAVE;
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	prv = req;
172	req = req->next;
173	Safefree (prv);
174
175	/* TODO: croak on errors? */
176	}
177
178	return count;
179	}
180
181	static void *aio_proc(void *arg);
182
183	static void
184	start_thread (void)
185	{
186	sigset_t fullsigset, oldsigset;
187	pthread_t tid;
188	pthread_attr_t attr;
189
190	pthread_attr_init (&attr);
191	pthread_attr_setstacksize (&attr, STACKSIZE);
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193
194	sigfillset (&fullsigset);
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
196
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{
214	reqe->next = req;
215	reqe = req;
216	}
217	else
218	reqe = reqs = req;
219
220	pthread_cond_signal (&reqwait);
221	pthread_mutex_unlock (&reqlock);
222
223	while (nreqs > max_outstanding)
224	{
225	poll_wait ();
226	poll_cb ();
227	}
228	}
229
230	static void
231	end_thread (void)
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}
239
240	/* work around various missing functions */
241
242	#if !HAVE_PREADWRITE
243	# define pread aio_pread
244	# define pwrite aio_pwrite
245
246	/*
247	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.
250	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
252
253	static ssize_t
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{
256	ssize_t res;
257	off_t ooffset;
258
259	pthread_mutex_lock (&iolock);
260	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);
265
266	return res;
267	}
268
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)
271	{
272	ssize_t res;
273	off_t ooffset;
274
275	pthread_mutex_lock (&iolock);
276	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);
281
282	return res;
283	}
284	#endif
285
286	#if !HAVE_FDATASYNC
287	# define fdatasync fsync
288	#endif
289
290	#if !HAVE_READAHEAD
291	# define readahead aio_readahead
292
293	static char readahead_buf[4096];
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{
298	while (count > 0)
299	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
301
302	pread (fd, readahead_buf, len, offset);
303	offset += len;
304	count -= len;
305	}
306
307	errno = 0;
308	}
309	#endif
310
311	static void *
312	aio_proc (void *thr_arg)
313	{
314	aio_req req;
315	int type;
316
317	do
318	{
319	pthread_mutex_lock (&reqlock);
320
321	for (;;)
322	{
323	req = reqs;
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330
331	if (req)
332	break;
333
334	pthread_cond_wait (&reqwait, &reqlock);
335	}
336
337	pthread_mutex_unlock (&reqlock);
338
339	errno = 0; /* strictly unnecessary */
340
341	type = req->type;
342
343	switch (type)
344	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
347
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
349
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:
362	break;
363
364	default:
365	req->result = ENOSYS;
366	break;
367	}
368
369	req->errorno = errno;
370
371	pthread_mutex_lock (&reslock);
372
373	req->next = 0;
374
375	if (rese)
376	{
377	rese->next = req;
378	rese = req;
379	}	328	}
380	else	329	else
381	{	330	{
382	rese = ress = req;	331	sv_result = newSViv (req->result);
383		332	SvREADONLY_on (sv_result);
384	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);
386	}	333	}
387		334
388	pthread_mutex_unlock (&reslock);	335	switch (req->type)
		336	{
		337	case EIO_READDIR:
		338	{
		339	SV *rv = &PL_sv_undef;
		340
		341	if (req->result >= 0)
		342	{
		343	int i;
		344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		346	AV *av = newAV ();
		347
		348	av_extend (av, req->result - 1);
		349
		350	for (i = 0; i < req->result; ++i)
		351	{
		352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
		376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
		384	names += SvCUR (name) + 1;
		385	}
		386	}
		387
		388	rv = sv_2mortal (newRV_noinc ((SV *)av));
		389	}
		390
		391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		395	}
		396	break;
		397
		398	case EIO_OPEN:
		399	{
		400	/* convert fd to fh */
		401	SV *fh = &PL_sv_undef;
		402
		403	if (req->result >= 0)
		404	{
		405	GV *gv = (GV *)sv_newmortal ();
		406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
		412
		413	symlen = snprintf (
		414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
		425	PUSHs (fh);
		426	}
		427	break;
		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
		459	case EIO_GROUP:
		460	req->int1 = 2; /* mark group as finished */
		461
		462	if (req->sv1)
		463	{
		464	int i;
		465	AV *av = (AV *)req->sv1;
		466
		467	EXTEND (SP, AvFILL (av) + 1);
		468	for (i = 0; i <= AvFILL (av); ++i)
		469	PUSHs (*av_fetch (av, i, 0));
		470	}
		471	break;
		472
		473	case EIO_NOP:
		474	case EIO_BUSY:
		475	break;
		476
		477	case EIO_READLINK:
		478	if (req->result > 0)
		479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		480	break;
		481
		482	case EIO_STAT:
		483	case EIO_LSTAT:
		484	case EIO_FSTAT:
		485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		486	PL_laststatval = req->result;
		487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		488	PUSHs (sv_result);
		489	break;
		490
		491	case EIO_READ:
		492	{
		493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		494	*SvEND (req->sv2) = 0;
		495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
		499	break;
		500
		501	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
		506	default:
		507	PUSHs (sv_result);
		508	break;
		509	}
		510
		511	errno = req->errorno;
		512
		513	PUTBACK;
		514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
		521
		522	FREETMPS;
		523	LEAVE;
		524
		525	PUTBACK;
389	}	526	}
390	while (type != REQ_QUIT);	527
		528	return !!SvTRUE (ERRSV);
		529	}
		530
		531	static void req_destroy (aio_req req)
		532	{
		533	if (req->self)
		534	{
		535	sv_unmagic (req->self, PERL_MAGIC_ext);
		536	SvREFCNT_dec (req->self);
		537	}
		538
		539	SvREFCNT_dec (req->sv1);
		540	SvREFCNT_dec (req->sv2);
		541	SvREFCNT_dec (req->callback);
		542
		543	Safefree (req);
		544	}
		545
		546	static void req_cancel_subs (aio_req grp)
		547	{
		548	aio_req sub;
		549
		550	if (grp->type != EIO_GROUP)
		551	return;
		552
		553	SvREFCNT_dec (grp->sv2);
		554	grp->sv2 = 0;
		555
		556	eio_grp_cancel (grp);
		557	}
		558
		559	static void
		560	create_respipe (void)
		561	{
		562	if (s_epipe_renew (&respipe))
		563	croak ("IO::AIO: unable to initialize result pipe");
		564	}
		565
		566	static void poll_wait (void)
		567	{
		568	while (eio_nreqs ())
		569	{
		570	int size;
		571
		572	X_LOCK (reslock);
		573	size = res_queue.size;
		574	X_UNLOCK (reslock);
		575
		576	if (size)
		577	return;
		578
		579	etp_maybe_start_thread ();
		580
		581	s_epipe_wait (&respipe);
		582	}
		583	}
		584
		585	static int poll_cb (void)
		586	{
		587	for (;;)
		588	{
		589	int res = eio_poll ();
		590
		591	if (res > 0)
		592	croak (0);
		593
		594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
		596
		597	poll_wait ();
		598	}
		599	}
		600
		601	static void atfork_child (void)
		602	{
		603	create_respipe ();
		604	}
		605
		606	/*****************************************************************************/
		607
		608	#if !_POSIX_MAPPED_FILES
		609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		610	# define munmap(addr,length) (errno = ENOSYS, -1)
		611	#endif
		612
		613	#define MMAP_MAGIC PERL_MAGIC_ext
		614
		615	static int
		616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		617	{
		618	int old_errno = errno;
		619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		620	errno = old_errno;
		621
		622	mg->mg_obj = 0; /* just in case */
		623
		624	SvREADONLY_off (sv);
		625	SvCUR_set (sv, 0);
		626	SvLEN_set (sv, 0);
		627	SvPVX (sv) = 0;
		628	SvOK_off (sv);
391		629
392	return 0;	630	return 0;
393	}	631	}
394		632
		633	static MGVTBL mmap_vtbl = {
		634	0, 0, 0, 0, mmap_free
		635	};
		636
		637	/*****************************************************************************/
		638
		639	static SV *
		640	get_cb (SV *cb_sv)
		641	{
		642	SvGETMAGIC (cb_sv);
		643	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		644	}
		645
		646	#define dREQ \
		647	SV *cb_cv; \
		648	aio_req req; \
		649	int req_pri = next_pri; \
		650	next_pri = EIO_PRI_DEFAULT; \
		651	\
		652	cb_cv = get_cb (callback); \
		653	\
		654	Newz (0, req, 1, eio_req); \
		655	if (!req) \
		656	croak ("out of memory during eio_req allocation"); \
		657	\
		658	req->callback = SvREFCNT_inc (cb_cv); \
		659	req->pri = req_pri
		660
		661	#define REQ_SEND \
		662	PUTBACK; \
		663	req_submit (req); \
		664	SPAGAIN; \
		665	\
		666	if (GIMME_V != G_VOID) \
		667	XPUSHs (req_sv (req, aio_req_stash));
		668
395	MODULE = IO::AIO PACKAGE = IO::AIO	669	MODULE = IO::AIO PACKAGE = IO::AIO
396		670
397	PROTOTYPES: ENABLE	671	PROTOTYPES: ENABLE
398		672
399	BOOT:	673	BOOT:
400	{	674	{
401	if (pipe (respipe))	675	static const struct {
402	croak ("unable to initialize result pipe");	676	const char *name;
		677	IV iv;
		678	} *civ, const_iv[] = {
		679	# define const_niv(name, value) { # name, (IV) value },
		680	# define const_iv(name) { # name, (IV) name },
		681	# define const_eio(name) { # name, (IV) EIO_ ## name },
		682	const_iv (EXDEV)
		683	const_iv (ENOSYS)
		684	const_iv (O_RDONLY)
		685	const_iv (O_WRONLY)
		686	const_iv (O_RDWR)
		687	const_iv (O_CREAT)
		688	const_iv (O_TRUNC)
		689	const_iv (O_EXCL)
		690	const_iv (O_APPEND)
		691	#ifndef _WIN32
		692	const_iv (S_IFIFO)
		693	#endif
		694	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		695	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		696	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		697	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		698	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		699	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
403		700
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	701	const_iv (ST_RDONLY)
405	croak ("cannot set result pipe to nonblocking mode");	702	const_iv (ST_NOSUID)
		703	const_iv (ST_NODEV)
		704	const_iv (ST_NOEXEC)
		705	const_iv (ST_SYNCHRONOUS)
		706	const_iv (ST_MANDLOCK)
		707	const_iv (ST_WRITE)
		708	const_iv (ST_APPEND)
		709	const_iv (ST_IMMUTABLE)
		710	const_iv (ST_NOATIME)
		711	const_iv (ST_NODIRATIME)
		712	const_iv (ST_RELATIME)
406		713
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	714	const_iv (PROT_EXEC)
408	croak ("cannot set result pipe to nonblocking mode");	715	const_iv (PROT_NONE)
409	}	716	const_iv (PROT_READ)
		717	const_iv (PROT_WRITE)
410		718
		719	/*const_iv (MAP_FIXED)*/
		720	const_iv (MAP_PRIVATE)
		721	const_iv (MAP_SHARED)
		722	const_iv (MAP_ANONYMOUS)
		723
		724	/* linuxish */
		725	const_iv (MAP_HUGETLB)
		726	const_iv (MAP_LOCKED)
		727	const_iv (MAP_NORESERVE)
		728	const_iv (MAP_POPULATE)
		729	const_iv (MAP_NONBLOCK)
		730
		731	const_iv (MCL_FUTURE)
		732	const_iv (MCL_CURRENT)
		733
		734	const_eio (MS_ASYNC)
		735	const_eio (MS_INVALIDATE)
		736	const_eio (MS_SYNC)
		737
		738	const_eio (MT_MODIFY)
		739
		740	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		741	const_eio (SYNC_FILE_RANGE_WRITE)
		742	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		743
		744	const_eio (READDIR_DENTS)
		745	const_eio (READDIR_DIRS_FIRST)
		746	const_eio (READDIR_STAT_ORDER)
		747	const_eio (READDIR_FOUND_UNKNOWN)
		748
		749	const_eio (DT_UNKNOWN)
		750	const_eio (DT_FIFO)
		751	const_eio (DT_CHR)
		752	const_eio (DT_DIR)
		753	const_eio (DT_BLK)
		754	const_eio (DT_REG)
		755	const_eio (DT_LNK)
		756	const_eio (DT_SOCK)
		757	const_eio (DT_WHT)
		758	};
		759
		760	aio_stash = gv_stashpv ("IO::AIO" , 1);
		761	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		762	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		763
		764	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		765	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		766
		767	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		768
		769	create_respipe ();
		770
		771	if (eio_init (want_poll, done_poll) < 0)
		772	croak ("IO::AIO: unable to initialise eio library");
		773
		774	/* atfork child called in fifo order, so before eio's handler */
		775	X_THREAD_ATFORK (0, 0, atfork_child);
		776	}
		777
411	void	778	void
412	min_parallel(nthreads)	779	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	780	PROTOTYPE: $
415	CODE:	781	CODE:
416	while (nthreads > started)	782	eio_set_max_poll_reqs (nreqs);
417	start_thread ();
418		783
419	void	784	void
420	max_parallel(nthreads)	785	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	786	PROTOTYPE: $
423	CODE:	787	CODE:
		788	eio_set_max_poll_time (nseconds);
		789
		790	void
		791	min_parallel (int nthreads)
		792	PROTOTYPE: $
		793	CODE:
		794	eio_set_min_parallel (nthreads);
		795
		796	void
		797	max_parallel (int nthreads)
		798	PROTOTYPE: $
		799	CODE:
		800	eio_set_max_parallel (nthreads);
		801
		802	void
		803	max_idle (int nthreads)
		804	PROTOTYPE: $
		805	CODE:
		806	eio_set_max_idle (nthreads);
		807
		808	void
		809	max_outstanding (int maxreqs)
		810	PROTOTYPE: $
		811	CODE:
		812	max_outstanding = maxreqs;
		813
		814	void
		815	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		816	PROTOTYPE: $$$;$
		817	PPCODE:
424	{	818	{
425	int cur = started;	819	dREQ;
426	while (cur > nthreads)	820
427	{	821	req->type = EIO_OPEN;
428	end_thread ();	822	req->sv1 = newSVsv (pathname);
429	cur--;	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
		824	req->int1 = flags;
		825	req->int2 = mode;
		826
		827	REQ_SEND;
		828	}
		829
		830	void
		831	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		832	PROTOTYPE: $;$
		833	ALIAS:
		834	aio_fsync = EIO_FSYNC
		835	aio_fdatasync = EIO_FDATASYNC
		836	PPCODE:
		837	{
		838	int fd = s_fileno_croak (fh, 0);
		839	dREQ;
		840
		841	req->type = ix;
		842	req->sv1 = newSVsv (fh);
		843	req->int1 = fd;
		844
		845	REQ_SEND (req);
		846	}
		847
		848	void
		849	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		850	PROTOTYPE: $$$$;$
		851	PPCODE:
		852	{
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	req->type = EIO_SYNC_FILE_RANGE;
		857	req->sv1 = newSVsv (fh);
		858	req->int1 = fd;
		859	req->offs = offset;
		860	req->size = nbytes;
		861	req->int2 = flags;
		862
		863	REQ_SEND (req);
		864	}
		865
		866	void
		867	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		868	PROTOTYPE: $;$
		869	PPCODE:
		870	{
		871	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		872	int fd = s_fileno_croak (fh, 0);
		873	dREQ;
		874
		875	if (close_pipe < 0)
		876	{
		877	int pipefd [2];
		878
		879	if (pipe (pipefd) < 0
		880	|| close (pipefd [1]) < 0
		881	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		882	abort (); /*D*/
		883
		884	close_pipe = pipefd [0];
430	}	885	}
431		886
432	while (started > nthreads)	887	req->type = EIO_DUP2;
		888	req->int1 = close_pipe;
		889	req->sv2 = newSVsv (fh);
		890	req->int2 = fd;
		891
		892	REQ_SEND (req);
		893	}
		894
		895	void
		896	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		897	ALIAS:
		898	aio_read = EIO_READ
		899	aio_write = EIO_WRITE
		900	PROTOTYPE: $$$$$;$
		901	PPCODE:
		902	{
		903	STRLEN svlen;
		904	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		905	char *svptr = SvPVbyte (data, svlen);
		906	UV len = SvUV (length);
		907
		908	if (dataoffset < 0)
		909	dataoffset += svlen;
		910
		911	if (dataoffset < 0 || dataoffset > svlen)
		912	croak ("dataoffset outside of data scalar");
		913
		914	if (ix == EIO_WRITE)
		915	{
		916	/* write: check length and adjust. */
		917	if (!SvOK (length) || len + dataoffset > svlen)
		918	len = svlen - dataoffset;
		919	}
		920	else
		921	{
		922	/* read: check type and grow scalar as necessary */
		923	SvUPGRADE (data, SVt_PV);
		924	svptr = SvGROW (data, len + dataoffset + 1);
		925	}
		926
		927	{
		928	dREQ;
		929
		930	req->type = ix;
		931	req->sv1 = newSVsv (fh);
		932	req->int1 = fd;
		933	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		934	req->size = len;
		935	req->sv2 = SvREFCNT_inc (data);
		936	req->ptr2 = (char *)svptr + dataoffset;
		937	req->stroffset = dataoffset;
		938
		939	if (!SvREADONLY (data))
		940	{
		941	SvREADONLY_on (data);
		942	req->flags |= FLAG_SV2_RO_OFF;
		943	}
		944
		945	REQ_SEND;
		946	}
		947	}
		948
		949	void
		950	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		951	PROTOTYPE: $$;$
		952	PPCODE:
		953	{
		954	SV *data;
		955	dREQ;
		956
		957	req->type = EIO_READLINK;
		958	req->sv1 = newSVsv (path);
		959	req->ptr1 = SvPVbyte_nolen (req->sv1);
		960
		961	REQ_SEND;
		962	}
		963
		964	void
		965	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		966	PROTOTYPE: $$$$;$
		967	PPCODE:
		968	{
		969	int ifd = s_fileno_croak (in_fh , 0);
		970	int ofd = s_fileno_croak (out_fh, 1);
		971	dREQ;
		972
		973	req->type = EIO_SENDFILE;
		974	req->sv1 = newSVsv (out_fh);
		975	req->int1 = ofd;
		976	req->sv2 = newSVsv (in_fh);
		977	req->int2 = ifd;
		978	req->offs = in_offset;
		979	req->size = length;
		980
		981	REQ_SEND;
		982	}
		983
		984	void
		985	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		986	PROTOTYPE: $$$;$
		987	PPCODE:
		988	{
		989	int fd = s_fileno_croak (fh, 0);
		990	dREQ;
		991
		992	req->type = EIO_READAHEAD;
		993	req->sv1 = newSVsv (fh);
		994	req->int1 = fd;
		995	req->offs = offset;
		996	req->size = length;
		997
		998	REQ_SEND;
		999	}
		1000
		1001	void
		1002	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1003	ALIAS:
		1004	aio_stat = EIO_STAT
		1005	aio_lstat = EIO_LSTAT
		1006	aio_statvfs = EIO_STATVFS
		1007	PPCODE:
		1008	{
		1009	dREQ;
		1010
		1011	req->sv1 = newSVsv (fh_or_path);
		1012
		1013	if (SvPOK (req->sv1))
		1014	{
		1015	req->type = ix;
		1016	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1017	}
		1018	else
		1019	{
		1020	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1021	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1022	}
		1023
		1024	REQ_SEND;
		1025	}
		1026
		1027	void
		1028	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1034	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1035	req->sv1 = newSVsv (fh_or_path);
		1036
		1037	if (SvPOK (req->sv1))
		1038	{
		1039	req->type = EIO_UTIME;
		1040	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1041	}
		1042	else
		1043	{
		1044	req->type = EIO_FUTIME;
		1045	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1046	}
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1053	PPCODE:
		1054	{
		1055	dREQ;
		1056
		1057	req->sv1 = newSVsv (fh_or_path);
		1058	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1059
		1060	if (SvPOK (req->sv1))
		1061	{
		1062	req->type = EIO_TRUNCATE;
		1063	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1064	}
		1065	else
		1066	{
		1067	req->type = EIO_FTRUNCATE;
		1068	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1069	}
		1070
		1071	REQ_SEND;
		1072	}
		1073
		1074	void
		1075	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1076	ALIAS:
		1077	aio_chmod = EIO_CHMOD
		1078	aio_mkdir = EIO_MKDIR
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->int2 = mode;
		1084	req->sv1 = newSVsv (fh_or_path);
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = ix;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FCHMOD;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	dREQ;
		1105
		1106	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1107	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1108	req->sv1 = newSVsv (fh_or_path);
		1109
		1110	if (SvPOK (req->sv1))
		1111	{
		1112	req->type = EIO_CHOWN;
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	}
		1115	else
		1116	{
		1117	req->type = EIO_FCHOWN;
		1118	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1119	}
		1120
		1121	REQ_SEND;
		1122	}
		1123
		1124	void
		1125	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_READDIR;
		1131	req->sv1 = newSVsv (pathname);
		1132	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1133	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1134
		1135	if (flags & EIO_READDIR_DENTS)
		1136	req->int1 |= EIO_READDIR_CUSTOM2;
		1137
		1138	REQ_SEND;
		1139	}
		1140
		1141	void
		1142	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1143	ALIAS:
		1144	aio_unlink = EIO_UNLINK
		1145	aio_rmdir = EIO_RMDIR
		1146	aio_readdir = EIO_READDIR
		1147	PPCODE:
		1148	{
		1149	dREQ;
		1150
		1151	req->type = ix;
		1152	req->sv1 = newSVsv (pathname);
		1153	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1160	ALIAS:
		1161	aio_link = EIO_LINK
		1162	aio_symlink = EIO_SYMLINK
		1163	aio_rename = EIO_RENAME
		1164	PPCODE:
		1165	{
		1166	dREQ;
		1167
		1168	req->type = ix;
		1169	req->sv1 = newSVsv (oldpath);
		1170	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1171	req->sv2 = newSVsv (newpath);
		1172	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1173
		1174	REQ_SEND;
		1175	}
		1176
		1177	void
		1178	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1179	PPCODE:
		1180	{
		1181	dREQ;
		1182
		1183	req->type = EIO_MKNOD;
		1184	req->sv1 = newSVsv (pathname);
		1185	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1186	req->int2 = (mode_t)mode;
		1187	req->offs = dev;
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
		1193	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1194	ALIAS:
		1195	aio_mtouch = EIO_MTOUCH
		1196	aio_msync = EIO_MSYNC
		1197	PROTOTYPE: $$$$;$
		1198	PPCODE:
		1199	{
		1200	STRLEN svlen;
		1201	UV len = SvUV (length);
		1202	char *svptr = SvPVbyte (data, svlen);
		1203
		1204	if (offset < 0)
		1205	offset += svlen;
		1206
		1207	if (offset < 0 || offset > svlen)
		1208	croak ("offset outside of scalar");
		1209
		1210	if (!SvOK (length) || len + offset > svlen)
		1211	len = svlen - offset;
		1212
		1213	{
		1214	dREQ;
		1215
		1216	req->type = ix;
		1217	req->size = len;
		1218	req->sv2 = SvREFCNT_inc (data);
		1219	req->ptr2 = (char *)svptr + offset;
		1220	req->int1 = flags;
		1221
		1222	REQ_SEND;
		1223	}
		1224	}
		1225
		1226	void
		1227	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->type = EIO_BUSY;
		1233	req->nv1 = delay < 0. ? 0. : delay;
		1234
		1235	REQ_SEND;
		1236	}
		1237
		1238	void
		1239	aio_group (SV *callback=&PL_sv_undef)
		1240	PROTOTYPE: ;$
		1241	PPCODE:
		1242	{
		1243	dREQ;
		1244
		1245	req->type = EIO_GROUP;
		1246
		1247	req_submit (req);
		1248	XPUSHs (req_sv (req, aio_grp_stash));
		1249	}
		1250
		1251	void
		1252	aio_nop (SV *callback=&PL_sv_undef)
		1253	ALIAS:
		1254	aio_nop = EIO_NOP
		1255	aio_sync = EIO_SYNC
		1256	PPCODE:
		1257	{
		1258	dREQ;
		1259
		1260	req->type = ix;
		1261
		1262	REQ_SEND;
		1263	}
		1264
		1265	int
		1266	aioreq_pri (int pri = 0)
		1267	PROTOTYPE: ;$
		1268	CODE:
		1269	RETVAL = next_pri;
		1270	if (items > 0)
		1271	{
		1272	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1273	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1274	next_pri = pri;
		1275	}
		1276	OUTPUT:
		1277	RETVAL
		1278
		1279	void
		1280	aioreq_nice (int nice = 0)
		1281	CODE:
		1282	nice = next_pri - nice;
		1283	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1284	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1285	next_pri = nice;
		1286
		1287	void
		1288	flush ()
		1289	PROTOTYPE:
		1290	CODE:
		1291	while (eio_nreqs ())
433	{	1292	{
434	poll_wait ();	1293	poll_wait ();
435	poll_cb ();	1294	poll_cb ();
436	}	1295	}
437	}
438		1296
439	int	1297	int
440	max_outstanding(nreqs)
441	int nreqs
442	PROTOTYPE: $
443	CODE:
444	RETVAL = max_outstanding;
445	max_outstanding = nreqs;
446
447	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
449	SV * pathname
450	int flags
451	int mode
452	SV * callback
453	PROTOTYPE: $$$;$
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);
466	req->fd = flags;
467	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469
470	send_req (req);
471	}
472
473	void
474	aio_close(fh,callback=&PL_sv_undef)
475	SV * fh
476	SV * callback
477	PROTOTYPE: $;$
478	ALIAS:
479	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC
482	CODE:
483	{
484	aio_req req;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490
491	req->type = ix;
492	req->fh = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495
496	send_req (req);
497	}
498
499	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501	SV * fh
502	UV offset
503	IV length
504	SV * data
505	IV dataoffset
506	SV * callback
507	ALIAS:
508	aio_read = REQ_READ
509	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$
511	CODE:
512	{
513	aio_req req;
514	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);
516
517	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);
519
520	if (dataoffset < 0)
521	dataoffset += svlen;
522
523	if (dataoffset < 0 || dataoffset > svlen)
524	croak ("data offset outside of string");
525
526	if (ix == REQ_WRITE)
527	{
528	/* write: check length and adjust. */
529	if (length < 0 || length + dataoffset > svlen)
530	length = svlen - dataoffset;
531	}
532	else
533	{
534	/* read: grow scalar as necessary */
535	svptr = SvGROW (data, length + dataoffset);
536	}
537
538	if (length < 0)
539	croak ("length must not be negative");
540
541	Newz (0, req, 1, aio_cb);
542
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;
547	req->fh = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));
550	req->offset = offset;
551	req->length = length;
552	req->data = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561	SV * fh
562	UV offset
563	IV length
564	SV * callback
565	PROTOTYPE: $$$;$
566	CODE:
567	{
568	aio_req req;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577
578	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;
582	req->length = length;
583	req->callback = SvREFCNT_inc (callback);
584
585	send_req (req);
586	}
587
588	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)
590	SV * fh_or_path
591	SV * callback
592	ALIAS:
593	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT
595	CODE:
596	{
597	aio_req req;
598
599	Newz (0, req, 1, aio_cb);
600
601	if (!req)
602	croak ("out of memory during aio_req allocation");
603
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");
608
609	if (SvPOK (fh_or_path))
610	{
611	req->type = ix;
612	req->data = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);
614	}
615	else
616	{
617	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}
621
622	req->callback = SvREFCNT_inc (callback);
623
624	send_req (req);
625	}
626
627	void
628	aio_unlink(pathname,callback=&PL_sv_undef)
629	SV * pathname
630	SV * callback
631	CODE:
632	{
633	aio_req req;
634
635	Newz (0, req, 1, aio_cb);
636
637	if (!req)
638	croak ("out of memory during aio_req allocation");
639
640	req->type = REQ_UNLINK;
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647
648	void
649	flush()
650	PROTOTYPE:
651	CODE:
652	while (nreqs)
653	{
654	poll_wait ();
655	poll_cb ();
656	}
657
658	void
659	poll()	1298	poll()
660	PROTOTYPE:	1299	PROTOTYPE:
661	CODE:	1300	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	1301	poll_wait ();
665	poll_cb ();	1302	RETVAL = poll_cb ();
666	}	1303	OUTPUT:
		1304	RETVAL
667		1305
668	int	1306	int
669	poll_fileno()	1307	poll_fileno()
670	PROTOTYPE:	1308	PROTOTYPE:
671	CODE:	1309	CODE:
672	RETVAL = respipe [0];	1310	RETVAL = s_epipe_fd (&respipe);
673	OUTPUT:	1311	OUTPUT:
674	RETVAL	1312	RETVAL
675		1313
676	int	1314	int
677	poll_cb(...)	1315	poll_cb(...)
…		…
683		1321
684	void	1322	void
685	poll_wait()	1323	poll_wait()
686	PROTOTYPE:	1324	PROTOTYPE:
687	CODE:	1325	CODE:
688	if (nreqs)
689	poll_wait ();	1326	poll_wait ();
690		1327
691	int	1328	int
692	nreqs()	1329	nreqs()
693	PROTOTYPE:	1330	PROTOTYPE:
694	CODE:	1331	CODE:
695	RETVAL = nreqs;	1332	RETVAL = eio_nreqs ();
696	OUTPUT:	1333	OUTPUT:
697	RETVAL	1334	RETVAL
698		1335
		1336	int
		1337	nready()
		1338	PROTOTYPE:
		1339	CODE:
		1340	RETVAL = eio_nready ();
		1341	OUTPUT:
		1342	RETVAL
		1343
		1344	int
		1345	npending()
		1346	PROTOTYPE:
		1347	CODE:
		1348	RETVAL = eio_npending ();
		1349	OUTPUT:
		1350	RETVAL
		1351
		1352	int
		1353	nthreads()
		1354	PROTOTYPE:
		1355	CODE:
		1356	RETVAL = eio_nthreads ();
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	int
		1361	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1362	PROTOTYPE: $$$$
		1363	CODE:
		1364	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1365	RETVAL = posix_fadvise (fh, offset, length, advice);
		1366	#else
		1367	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1368	#endif
		1369	OUTPUT:
		1370	RETVAL
		1371
		1372	ssize_t
		1373	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1374	PROTOTYPE: $$$$
		1375	CODE:
		1376	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	void
		1381	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1382	PROTOTYPE: $$$$$;$
		1383	PPCODE:
		1384	sv_unmagic (scalar, MMAP_MAGIC);
		1385	{
		1386	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1387	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1388	if (addr == (void *)-1)
		1389	XSRETURN_NO;
		1390
		1391	/* we store the length in mg_obj, as namlen is I32 :/ */
		1392	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1393	->mg_obj = (SV *)length;
		1394
		1395	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1396	if (!(prot & PROT_WRITE))
		1397	SvREADONLY_on (scalar);
		1398
		1399	SvPVX (scalar) = (char *)addr;
		1400	SvCUR_set (scalar, length);
		1401	SvLEN_set (scalar, 0);
		1402	SvPOK_only (scalar);
		1403
		1404	XSRETURN_YES;
		1405	}
		1406
		1407	void
		1408	munmap (SV *scalar)
		1409	PROTOTYPE: $
		1410	CODE:
		1411	sv_unmagic (scalar, MMAP_MAGIC);
		1412
		1413	int
		1414	mlockall (int flags)
		1415	PROTOTYPE: $
		1416	CODE:
		1417	#if _POSIX_MEMLOCK
		1418	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1419	extern int mallopt (int, int);
		1420	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1421	#endif
		1422	mlockall (flags);
		1423	#else
		1424	RETVAL = -1;
		1425	errno = ENOSYS;
		1426	#endif
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	int
		1431	munlockall ()
		1432	PROTOTYPE:
		1433	CODE:
		1434	#if _POSIX_MEMLOCK
		1435	munlockall ();
		1436	#else
		1437	RETVAL = -1;
		1438	errno = ENOSYS;
		1439	#endif
		1440	OUTPUT:
		1441	RETVAL
		1442
		1443	void _on_next_submit (SV *cb)
		1444	CODE:
		1445	SvREFCNT_dec (on_next_submit);
		1446	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1447
		1448	PROTOTYPES: DISABLE
		1449
		1450	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1451
		1452	void
		1453	cancel (aio_req_ornot req)
		1454	CODE:
		1455	eio_cancel (req);
		1456
		1457	void
		1458	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1459	PPCODE:
		1460	{
		1461	if (GIMME_V != G_VOID)
		1462	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1463
		1464	if (items > 1)
		1465	{
		1466	SV *cb_cv =get_cb (callback);
		1467
		1468	SvREFCNT_dec (req->callback);
		1469	req->callback = SvREFCNT_inc (cb_cv);
		1470	}
		1471	}
		1472
		1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1474
		1475	void
		1476	add (aio_req grp, ...)
		1477	PPCODE:
		1478	{
		1479	int i;
		1480
		1481	if (grp->int1 == 2)
		1482	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1483
		1484	for (i = 1; i < items; ++i )
		1485	{
		1486	aio_req req;
		1487
		1488	if (GIMME_V != G_VOID)
		1489	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1490
		1491	req = SvAIO_REQ (ST (i));
		1492
		1493	if (req)
		1494	eio_grp_add (grp, req);
		1495	}
		1496	}
		1497
		1498	void
		1499	cancel_subs (aio_req_ornot req)
		1500	CODE:
		1501	req_cancel_subs (req);
		1502
		1503	void
		1504	result (aio_req grp, ...)
		1505	CODE:
		1506	{
		1507	int i;
		1508	AV *av;
		1509
		1510	grp->errorno = errno;
		1511
		1512	av = newAV ();
		1513	av_extend (av, items - 1);
		1514
		1515	for (i = 1; i < items; ++i )
		1516	av_push (av, newSVsv (ST (i)));
		1517
		1518	SvREFCNT_dec (grp->sv1);
		1519	grp->sv1 = (SV *)av;
		1520	}
		1521
		1522	void
		1523	errno (aio_req grp, int errorno = errno)
		1524	CODE:
		1525	grp->errorno = errorno;
		1526
		1527	void
		1528	limit (aio_req grp, int limit)
		1529	CODE:
		1530	eio_grp_limit (grp, limit);
		1531
		1532	void
		1533	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1534	CODE:
		1535	{
		1536	SvREFCNT_dec (grp->sv2);
		1537	grp->sv2 = newSVsv (callback);
		1538	grp->feed = aio_grp_feed;
		1539
		1540	if (grp->int2 <= 0)
		1541	grp->int2 = 2;
		1542
		1543	eio_grp_limit (grp, grp->int2);
		1544	}
		1545

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