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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.9 by root, Tue Jul 12 11:02:54 2005 UTC vs.
Revision 1.168 by root, Wed Aug 4 14:02:58 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
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
5	#include <sys/types.h>	14	#include <sys/types.h>
6	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
7	#include <unistd.h>	17	#include <limits.h>
8	#include <fcntl.h>	18	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	19	#include <sched.h>
11		20
12	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
13	#include <sys/syscall.h>	22	# include <sys/mman.h>
		23	#endif
14		24
15	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
16	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
17	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
18		27
19	#if __ia64	28	#ifdef _WIN32
20	# 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
21	#else	66	#else
22	# 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 */
23	#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)
24		214
25	enum {	215	enum {
26	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
27	REQ_OPEN, REQ_CLOSE,
28	REQ_READ, REQ_WRITE, REQ_READAHEAD,
29	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
30	REQ_FSYNC, REQ_FDATASYNC,
31	};	217	};
32		218
33	typedef struct aio_cb {	219	#include "libeio/eio.c"
34	struct aio_cb *volatile next;
35		220
36	int type;
37
38	int fd;
39	off_t offset;
40	size_t length;
41	ssize_t result;
42	mode_t mode; /* open */
43	int errorno;
44	SV *data, *callback;
45	void *dataptr;
46	STRLEN dataoffset;
47
48	Stat_t *statdata;
49	} aio_cb;
50
51	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
		222	typedef eio_req *aio_req_ornot;
52		223
53	static int started;	224	static SV *on_next_submit;
54	static int nreqs;	225	static int next_pri = EIO_PRI_DEFAULT;
55	static int max_outstanding = 1<<30;	226	static int max_outstanding;
56	static int respipe [2];
57		227
58	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
59	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
60	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
61		229
62	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	static void req_destroy (aio_req req);
63	static volatile aio_req ress, rese; /* queue start, queue end */	231	static void req_cancel (aio_req req);
64		232
65	static void	233	static void want_poll (void)
66	poll_wait ()
67	{	234	{
68	if (!nreqs)	235	/* write a dummy byte to the pipe so fh becomes ready */
69	return;	236	s_epipe_signal (&respipe);
70
71	fd_set rfd;
72	FD_ZERO(&rfd);
73	FD_SET(respipe [0], &rfd);
74
75	select (respipe [0] + 1, &rfd, 0, 0, 0);
76	}	237	}
77		238
78	static int	239	static void done_poll (void)
79	poll_cb ()
80	{	240	{
81	dSP;
82	int count = 0;
83	aio_req req;
84
85	{
86	/* read and signals sent by the worker threads */	241	/* read any signals sent by the worker threads */
87	char buf [32];	242	s_epipe_drain (&respipe);
88	while (read (respipe [0], buf, 32) > 0)	243	}
89	;
90	}
91		244
92	for (;;)	245	/* must be called at most once */
		246	static SV *req_sv (aio_req req, HV *stash)
		247	{
		248	if (!req->self)
93	{	249	{
94	pthread_mutex_lock (&reslock);	250	req->self = (SV *)newHV ();
		251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		252	}
95		253
96	req = ress;	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		255	}
97		256
98	if (ress)	257	static aio_req SvAIO_REQ (SV *sv)
		258	{
		259	MAGIC *mg;
		260
		261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		265	croak ("object of class IO::AIO::REQ expected");
		266
		267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		268
		269	return mg ? (aio_req)mg->mg_ptr : 0;
		270	}
		271
		272	static void aio_grp_feed (aio_req grp)
		273	{
		274	if (grp->sv2 && SvOK (grp->sv2))
		275	{
		276	dSP;
		277
		278	ENTER;
		279	SAVETMPS;
		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))
99	{	325	{
100	ress = ress->next;	326	sv_result = sv_result_cache; sv_result_cache = 0;
101	if (!ress) rese = 0;	327	SvIV_set (sv_result, req->result);
102	}
103
104	pthread_mutex_unlock (&reslock);
105
106	if (!req)
107	break;
108
109	nreqs--;
110
111	if (req->type == REQ_QUIT)
112	started--;
113	else
114	{
115	int errorno = errno;
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
126	{
127	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
128	PL_laststatval = req->result;
129	PL_statcache = *(req->statdata);
130
131	Safefree (req->statdata);
132	}
133
134	PUSHMARK (SP);
135	XPUSHs (sv_2mortal (newSViv (req->result)));
136
137	if (req->type == REQ_OPEN)
138	{
139	/* convert fd to fh */
140	SV *fh;
141
142	PUTBACK;
143	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
144	SPAGAIN;
145
146	fh = POPs;
147
148	PUSHMARK (SP);
149	XPUSHs (fh);
150	}
151
152	if (SvOK (req->callback))
153	{
154	PUTBACK;
155	call_sv (req->callback, G_VOID | G_EVAL);
156	SPAGAIN;
157	}
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	Safefree (req);
167	}
168
169	return count;
170	}
171
172	static void *aio_proc(void *arg);
173
174	static void
175	start_thread (void)
176	{
177	sigset_t fullsigset, oldsigset;
178	pthread_t tid;
179	pthread_attr_t attr;
180
181	pthread_attr_init (&attr);
182	pthread_attr_setstacksize (&attr, STACKSIZE);
183	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
184
185	sigfillset (&fullsigset);
186	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
187
188	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
189	started++;
190
191	sigprocmask (SIG_SETMASK, &oldsigset, 0);
192	}
193
194	static void
195	send_req (aio_req req)
196	{
197	nreqs++;
198
199	pthread_mutex_lock (&reqlock);
200
201	req->next = 0;
202
203	if (reqe)
204	{
205	reqe->next = req;
206	reqe = req;
207	}
208	else
209	reqe = reqs = req;
210
211	pthread_cond_signal (&reqwait);
212	pthread_mutex_unlock (&reqlock);
213
214	while (nreqs > max_outstanding)
215	{
216	poll_wait ();
217	poll_cb ();
218	}
219	}
220
221	static void
222	end_thread (void)
223	{
224	aio_req req;
225	New (0, req, 1, aio_cb);
226	req->type = REQ_QUIT;
227
228	send_req (req);
229	}
230
231	static void
232	read_write (int dowrite, int fd, off_t offset, size_t length,
233	SV *data, STRLEN dataoffset, SV *callback)
234	{
235	aio_req req;
236	STRLEN svlen;
237	char *svptr = SvPV (data, svlen);
238
239	SvUPGRADE (data, SVt_PV);
240	SvPOK_on (data);
241
242	if (dataoffset < 0)
243	dataoffset += svlen;
244
245	if (dataoffset < 0 || dataoffset > svlen)
246	croak ("data offset outside of string");
247
248	if (dowrite)
249	{
250	/* write: check length and adjust. */
251	if (length < 0 || length + dataoffset > svlen)
252	length = svlen - dataoffset;
253	}
254	else
255	{
256	/* read: grow scalar as necessary */
257	svptr = SvGROW (data, length + dataoffset);
258	}
259
260	if (length < 0)
261	croak ("length must not be negative");
262
263	Newz (0, req, 1, aio_cb);
264
265	if (!req)
266	croak ("out of memory during aio_req allocation");
267
268	req->type = dowrite ? REQ_WRITE : REQ_READ;
269	req->fd = fd;
270	req->offset = offset;
271	req->length = length;
272	req->data = SvREFCNT_inc (data);
273	req->dataptr = (char *)svptr + dataoffset;
274	req->callback = SvREFCNT_inc (callback);
275
276	send_req (req);
277	}
278
279	static void *
280	aio_proc (void *thr_arg)
281	{
282	aio_req req;
283	int type;
284
285	do
286	{
287	pthread_mutex_lock (&reqlock);
288
289	for (;;)
290	{
291	req = reqs;
292
293	if (reqs)
294	{
295	reqs = reqs->next;
296	if (!reqs) reqe = 0;
297	}
298
299	if (req)
300	break;
301
302	pthread_cond_wait (&reqwait, &reqlock);
303	}
304
305	pthread_mutex_unlock (&reqlock);
306
307	errno = 0; /* strictly unnecessary */
308
309	type = req->type;
310
311	switch (type)
312	{
313	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
314	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
315	#if SYS_readahead
316	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
317	#else
318	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
319	#endif
320
321	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
322	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
323	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
324
325	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
326	case REQ_CLOSE: req->result = close (req->fd); break;
327	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
328
329	case REQ_FSYNC: req->result = fsync (req->fd); break;
330	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
331
332	case REQ_QUIT:
333	break;
334
335	default:
336	req->result = ENOSYS;
337	break;
338	}
339
340	req->errorno = errno;
341
342	pthread_mutex_lock (&reslock);
343
344	req->next = 0;
345
346	if (rese)
347	{
348	rese->next = req;
349	rese = req;
350	}	328	}
351	else	329	else
352	{	330	{
353	rese = ress = req;	331	sv_result = newSViv (req->result);
354		332	SvREADONLY_on (sv_result);
355	/* write a dummy byte to the pipe so fh becomes ready */
356	write (respipe [1], &respipe, 1);
357	}	333	}
358		334
359	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;
360	}	526	}
361	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
		626	if (SvPVX (sv) != mg->mg_ptr)
		627	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		628
		629	SvCUR_set (sv, 0);
		630	SvPVX (sv) = 0;
		631	SvOK_off (sv);
362		632
363	return 0;	633	return 0;
364	}	634	}
365		635
		636	static MGVTBL mmap_vtbl = {
		637	0, 0, 0, 0, mmap_free
		638	};
		639
		640	/*****************************************************************************/
		641
		642	static SV *
		643	get_cb (SV *cb_sv)
		644	{
		645	SvGETMAGIC (cb_sv);
		646	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		647	}
		648
		649	#define dREQ \
		650	SV *cb_cv; \
		651	aio_req req; \
		652	int req_pri = next_pri; \
		653	next_pri = EIO_PRI_DEFAULT; \
		654	\
		655	cb_cv = get_cb (callback); \
		656	\
		657	Newz (0, req, 1, eio_req); \
		658	if (!req) \
		659	croak ("out of memory during eio_req allocation"); \
		660	\
		661	req->callback = SvREFCNT_inc (cb_cv); \
		662	req->pri = req_pri
		663
		664	#define REQ_SEND \
		665	PUTBACK; \
		666	req_submit (req); \
		667	SPAGAIN; \
		668	\
		669	if (GIMME_V != G_VOID) \
		670	XPUSHs (req_sv (req, aio_req_stash));
		671
366	MODULE = IO::AIO PACKAGE = IO::AIO	672	MODULE = IO::AIO PACKAGE = IO::AIO
367		673
368	PROTOTYPES: ENABLE	674	PROTOTYPES: ENABLE
369		675
370	BOOT:	676	BOOT:
371	{	677	{
372	if (pipe (respipe))	678	static const struct {
373	croak ("unable to initialize result pipe");	679	const char *name;
		680	IV iv;
		681	} *civ, const_iv[] = {
		682	# define const_niv(name, value) { # name, (IV) value },
		683	# define const_iv(name) { # name, (IV) name },
		684	# define const_eio(name) { # name, (IV) EIO_ ## name },
		685	const_iv (EXDEV)
		686	const_iv (ENOSYS)
		687	const_iv (O_RDONLY)
		688	const_iv (O_WRONLY)
		689	const_iv (O_RDWR)
		690	const_iv (O_CREAT)
		691	const_iv (O_TRUNC)
		692	const_iv (O_EXCL)
		693	const_iv (O_APPEND)
		694	#ifndef _WIN32
		695	const_iv (S_IFIFO)
		696	#endif
		697	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		698	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		699	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		700	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		701	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		702	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
374		703
375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	704	const_iv (ST_RDONLY)
376	croak ("cannot set result pipe to nonblocking mode");	705	const_iv (ST_NOSUID)
		706	const_iv (ST_NODEV)
		707	const_iv (ST_NOEXEC)
		708	const_iv (ST_SYNCHRONOUS)
		709	const_iv (ST_MANDLOCK)
		710	const_iv (ST_WRITE)
		711	const_iv (ST_APPEND)
		712	const_iv (ST_IMMUTABLE)
		713	const_iv (ST_NOATIME)
		714	const_iv (ST_NODIRATIME)
		715	const_iv (ST_RELATIME)
377		716
378	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	717	const_iv (PROT_EXEC)
379	croak ("cannot set result pipe to nonblocking mode");	718	const_iv (PROT_NONE)
380	}	719	const_iv (PROT_READ)
		720	const_iv (PROT_WRITE)
381		721
		722	/*const_iv (MAP_FIXED)*/
		723	const_iv (MAP_PRIVATE)
		724	const_iv (MAP_SHARED)
		725	const_iv (MAP_ANONYMOUS)
		726
		727	/* linuxish */
		728	const_iv (MAP_HUGETLB)
		729	const_iv (MAP_LOCKED)
		730	const_iv (MAP_NORESERVE)
		731	const_iv (MAP_POPULATE)
		732	const_iv (MAP_NONBLOCK)
		733
		734	const_iv (MCL_FUTURE)
		735	const_iv (MCL_CURRENT)
		736
		737	const_eio (MS_ASYNC)
		738	const_eio (MS_INVALIDATE)
		739	const_eio (MS_SYNC)
		740
		741	const_eio (MT_MODIFY)
		742
		743	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		744	const_eio (SYNC_FILE_RANGE_WRITE)
		745	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		746
		747	const_eio (READDIR_DENTS)
		748	const_eio (READDIR_DIRS_FIRST)
		749	const_eio (READDIR_STAT_ORDER)
		750	const_eio (READDIR_FOUND_UNKNOWN)
		751
		752	const_eio (DT_UNKNOWN)
		753	const_eio (DT_FIFO)
		754	const_eio (DT_CHR)
		755	const_eio (DT_DIR)
		756	const_eio (DT_BLK)
		757	const_eio (DT_REG)
		758	const_eio (DT_LNK)
		759	const_eio (DT_SOCK)
		760	const_eio (DT_WHT)
		761	};
		762
		763	aio_stash = gv_stashpv ("IO::AIO" , 1);
		764	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		765	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		766
		767	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		768	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		769
		770	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		771
		772	create_respipe ();
		773
		774	if (eio_init (want_poll, done_poll) < 0)
		775	croak ("IO::AIO: unable to initialise eio library");
		776
		777	/* atfork child called in fifo order, so before eio's handler */
		778	X_THREAD_ATFORK (0, 0, atfork_child);
		779	}
		780
382	void	781	void
383	min_parallel(nthreads)	782	max_poll_reqs (int nreqs)
384	int nthreads
385	PROTOTYPE: $	783	PROTOTYPE: $
386	CODE:	784	CODE:
387	while (nthreads > started)	785	eio_set_max_poll_reqs (nreqs);
388	start_thread ();
389		786
390	void	787	void
391	max_parallel(nthreads)	788	max_poll_time (double nseconds)
392	int nthreads
393	PROTOTYPE: $	789	PROTOTYPE: $
394	CODE:	790	CODE:
		791	eio_set_max_poll_time (nseconds);
		792
		793	void
		794	min_parallel (int nthreads)
		795	PROTOTYPE: $
		796	CODE:
		797	eio_set_min_parallel (nthreads);
		798
		799	void
		800	max_parallel (int nthreads)
		801	PROTOTYPE: $
		802	CODE:
		803	eio_set_max_parallel (nthreads);
		804
		805	void
		806	max_idle (int nthreads)
		807	PROTOTYPE: $
		808	CODE:
		809	eio_set_max_idle (nthreads);
		810
		811	void
		812	max_outstanding (int maxreqs)
		813	PROTOTYPE: $
		814	CODE:
		815	max_outstanding = maxreqs;
		816
		817	void
		818	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		819	PROTOTYPE: $$$;$
		820	PPCODE:
395	{	821	{
396	int cur = started;	822	dREQ;
397	while (cur > nthreads)	823
398	{	824	req->type = EIO_OPEN;
399	end_thread ();	825	req->sv1 = newSVsv (pathname);
400	cur--;	826	req->ptr1 = SvPVbyte_nolen (req->sv1);
		827	req->int1 = flags;
		828	req->int2 = mode;
		829
		830	REQ_SEND;
		831	}
		832
		833	void
		834	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		835	PROTOTYPE: $;$
		836	ALIAS:
		837	aio_fsync = EIO_FSYNC
		838	aio_fdatasync = EIO_FDATASYNC
		839	PPCODE:
		840	{
		841	int fd = s_fileno_croak (fh, 0);
		842	dREQ;
		843
		844	req->type = ix;
		845	req->sv1 = newSVsv (fh);
		846	req->int1 = fd;
		847
		848	REQ_SEND (req);
		849	}
		850
		851	void
		852	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		853	PROTOTYPE: $$$$;$
		854	PPCODE:
		855	{
		856	int fd = s_fileno_croak (fh, 0);
		857	dREQ;
		858
		859	req->type = EIO_SYNC_FILE_RANGE;
		860	req->sv1 = newSVsv (fh);
		861	req->int1 = fd;
		862	req->offs = offset;
		863	req->size = nbytes;
		864	req->int2 = flags;
		865
		866	REQ_SEND (req);
		867	}
		868
		869	void
		870	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		871	PROTOTYPE: $;$
		872	PPCODE:
		873	{
		874	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		875	int fd = s_fileno_croak (fh, 0);
		876	dREQ;
		877
		878	if (close_pipe < 0)
		879	{
		880	int pipefd [2];
		881
		882	if (pipe (pipefd) < 0
		883	|| close (pipefd [1]) < 0
		884	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		885	abort (); /*D*/
		886
		887	close_pipe = pipefd [0];
401	}	888	}
402		889
403	while (started > nthreads)	890	req->type = EIO_DUP2;
		891	req->int1 = close_pipe;
		892	req->sv2 = newSVsv (fh);
		893	req->int2 = fd;
		894
		895	REQ_SEND (req);
		896	}
		897
		898	void
		899	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		900	ALIAS:
		901	aio_read = EIO_READ
		902	aio_write = EIO_WRITE
		903	PROTOTYPE: $$$$$;$
		904	PPCODE:
		905	{
		906	STRLEN svlen;
		907	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		908	char *svptr = SvPVbyte (data, svlen);
		909	UV len = SvUV (length);
		910
		911	if (dataoffset < 0)
		912	dataoffset += svlen;
		913
		914	if (dataoffset < 0 || dataoffset > svlen)
		915	croak ("dataoffset outside of data scalar");
		916
		917	if (ix == EIO_WRITE)
		918	{
		919	/* write: check length and adjust. */
		920	if (!SvOK (length) || len + dataoffset > svlen)
		921	len = svlen - dataoffset;
		922	}
		923	else
		924	{
		925	/* read: check type and grow scalar as necessary */
		926	SvUPGRADE (data, SVt_PV);
		927	svptr = SvGROW (data, len + dataoffset + 1);
		928	}
		929
		930	{
		931	dREQ;
		932
		933	req->type = ix;
		934	req->sv1 = newSVsv (fh);
		935	req->int1 = fd;
		936	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		937	req->size = len;
		938	req->sv2 = SvREFCNT_inc (data);
		939	req->ptr2 = (char *)svptr + dataoffset;
		940	req->stroffset = dataoffset;
		941
		942	if (!SvREADONLY (data))
		943	{
		944	SvREADONLY_on (data);
		945	req->flags |= FLAG_SV2_RO_OFF;
		946	}
		947
		948	REQ_SEND;
		949	}
		950	}
		951
		952	void
		953	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		954	PROTOTYPE: $$;$
		955	PPCODE:
		956	{
		957	SV *data;
		958	dREQ;
		959
		960	req->type = EIO_READLINK;
		961	req->sv1 = newSVsv (path);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963
		964	REQ_SEND;
		965	}
		966
		967	void
		968	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		969	PROTOTYPE: $$$$;$
		970	PPCODE:
		971	{
		972	int ifd = s_fileno_croak (in_fh , 0);
		973	int ofd = s_fileno_croak (out_fh, 1);
		974	dREQ;
		975
		976	req->type = EIO_SENDFILE;
		977	req->sv1 = newSVsv (out_fh);
		978	req->int1 = ofd;
		979	req->sv2 = newSVsv (in_fh);
		980	req->int2 = ifd;
		981	req->offs = in_offset;
		982	req->size = length;
		983
		984	REQ_SEND;
		985	}
		986
		987	void
		988	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		989	PROTOTYPE: $$$;$
		990	PPCODE:
		991	{
		992	int fd = s_fileno_croak (fh, 0);
		993	dREQ;
		994
		995	req->type = EIO_READAHEAD;
		996	req->sv1 = newSVsv (fh);
		997	req->int1 = fd;
		998	req->offs = offset;
		999	req->size = length;
		1000
		1001	REQ_SEND;
		1002	}
		1003
		1004	void
		1005	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1006	ALIAS:
		1007	aio_stat = EIO_STAT
		1008	aio_lstat = EIO_LSTAT
		1009	aio_statvfs = EIO_STATVFS
		1010	PPCODE:
		1011	{
		1012	dREQ;
		1013
		1014	req->sv1 = newSVsv (fh_or_path);
		1015
		1016	if (SvPOK (req->sv1))
		1017	{
		1018	req->type = ix;
		1019	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1020	}
		1021	else
		1022	{
		1023	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1024	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1025	}
		1026
		1027	REQ_SEND;
		1028	}
		1029
		1030	void
		1031	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1032	PPCODE:
		1033	{
		1034	dREQ;
		1035
		1036	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1037	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1038	req->sv1 = newSVsv (fh_or_path);
		1039
		1040	if (SvPOK (req->sv1))
		1041	{
		1042	req->type = EIO_UTIME;
		1043	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1044	}
		1045	else
		1046	{
		1047	req->type = EIO_FUTIME;
		1048	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1049	}
		1050
		1051	REQ_SEND;
		1052	}
		1053
		1054	void
		1055	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1056	PPCODE:
		1057	{
		1058	dREQ;
		1059
		1060	req->sv1 = newSVsv (fh_or_path);
		1061	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_TRUNCATE;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FTRUNCATE;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1079	ALIAS:
		1080	aio_chmod = EIO_CHMOD
		1081	aio_mkdir = EIO_MKDIR
		1082	PPCODE:
		1083	{
		1084	dREQ;
		1085
		1086	req->int2 = mode;
		1087	req->sv1 = newSVsv (fh_or_path);
		1088
		1089	if (SvPOK (req->sv1))
		1090	{
		1091	req->type = ix;
		1092	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1093	}
		1094	else
		1095	{
		1096	req->type = EIO_FCHMOD;
		1097	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1098	}
		1099
		1100	REQ_SEND;
		1101	}
		1102
		1103	void
		1104	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1110	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1111	req->sv1 = newSVsv (fh_or_path);
		1112
		1113	if (SvPOK (req->sv1))
		1114	{
		1115	req->type = EIO_CHOWN;
		1116	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1117	}
		1118	else
		1119	{
		1120	req->type = EIO_FCHOWN;
		1121	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1122	}
		1123
		1124	REQ_SEND;
		1125	}
		1126
		1127	void
		1128	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	dREQ;
		1132
		1133	req->type = EIO_READDIR;
		1134	req->sv1 = newSVsv (pathname);
		1135	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1136	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1137
		1138	if (flags & EIO_READDIR_DENTS)
		1139	req->int1 |= EIO_READDIR_CUSTOM2;
		1140
		1141	REQ_SEND;
		1142	}
		1143
		1144	void
		1145	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1146	ALIAS:
		1147	aio_unlink = EIO_UNLINK
		1148	aio_rmdir = EIO_RMDIR
		1149	aio_readdir = EIO_READDIR
		1150	PPCODE:
		1151	{
		1152	dREQ;
		1153
		1154	req->type = ix;
		1155	req->sv1 = newSVsv (pathname);
		1156	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1157
		1158	REQ_SEND;
		1159	}
		1160
		1161	void
		1162	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1163	ALIAS:
		1164	aio_link = EIO_LINK
		1165	aio_symlink = EIO_SYMLINK
		1166	aio_rename = EIO_RENAME
		1167	PPCODE:
		1168	{
		1169	dREQ;
		1170
		1171	req->type = ix;
		1172	req->sv1 = newSVsv (oldpath);
		1173	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1174	req->sv2 = newSVsv (newpath);
		1175	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	dREQ;
		1185
		1186	req->type = EIO_MKNOD;
		1187	req->sv1 = newSVsv (pathname);
		1188	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1189	req->int2 = (mode_t)mode;
		1190	req->offs = dev;
		1191
		1192	REQ_SEND;
		1193	}
		1194
		1195	void
		1196	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1197	ALIAS:
		1198	aio_mtouch = EIO_MTOUCH
		1199	aio_msync = EIO_MSYNC
		1200	PROTOTYPE: $$$$;$
		1201	PPCODE:
		1202	{
		1203	STRLEN svlen;
		1204	UV len = SvUV (length);
		1205	char *svptr = SvPVbyte (data, svlen);
		1206
		1207	if (offset < 0)
		1208	offset += svlen;
		1209
		1210	if (offset < 0 || offset > svlen)
		1211	croak ("offset outside of scalar");
		1212
		1213	if (!SvOK (length) || len + offset > svlen)
		1214	len = svlen - offset;
		1215
		1216	{
		1217	dREQ;
		1218
		1219	req->type = ix;
		1220	req->size = len;
		1221	req->sv2 = SvREFCNT_inc (data);
		1222	req->ptr2 = (char *)svptr + offset;
		1223	req->int1 = flags;
		1224
		1225	REQ_SEND;
		1226	}
		1227	}
		1228
		1229	void
		1230	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1231	PPCODE:
		1232	{
		1233	dREQ;
		1234
		1235	req->type = EIO_BUSY;
		1236	req->nv1 = delay < 0. ? 0. : delay;
		1237
		1238	REQ_SEND;
		1239	}
		1240
		1241	void
		1242	aio_group (SV *callback=&PL_sv_undef)
		1243	PROTOTYPE: ;$
		1244	PPCODE:
		1245	{
		1246	dREQ;
		1247
		1248	req->type = EIO_GROUP;
		1249
		1250	req_submit (req);
		1251	XPUSHs (req_sv (req, aio_grp_stash));
		1252	}
		1253
		1254	void
		1255	aio_nop (SV *callback=&PL_sv_undef)
		1256	ALIAS:
		1257	aio_nop = EIO_NOP
		1258	aio_sync = EIO_SYNC
		1259	PPCODE:
		1260	{
		1261	dREQ;
		1262
		1263	req->type = ix;
		1264
		1265	REQ_SEND;
		1266	}
		1267
		1268	int
		1269	aioreq_pri (int pri = 0)
		1270	PROTOTYPE: ;$
		1271	CODE:
		1272	RETVAL = next_pri;
		1273	if (items > 0)
		1274	{
		1275	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1276	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1277	next_pri = pri;
		1278	}
		1279	OUTPUT:
		1280	RETVAL
		1281
		1282	void
		1283	aioreq_nice (int nice = 0)
		1284	CODE:
		1285	nice = next_pri - nice;
		1286	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1287	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1288	next_pri = nice;
		1289
		1290	void
		1291	flush ()
		1292	PROTOTYPE:
		1293	CODE:
		1294	while (eio_nreqs ())
404	{	1295	{
405	poll_wait ();	1296	poll_wait ();
406	poll_cb ();	1297	poll_cb ();
407	}	1298	}
408	}
409		1299
410	int	1300	int
411	max_outstanding(nreqs)
412	int nreqs
413	PROTOTYPE: $
414	CODE:
415	RETVAL = max_outstanding;
416	max_outstanding = nreqs;
417
418	void
419	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
420	SV * pathname
421	int flags
422	int mode
423	SV * callback
424	PROTOTYPE: $$$;$
425	CODE:
426	{
427	aio_req req;
428
429	Newz (0, req, 1, aio_cb);
430
431	if (!req)
432	croak ("out of memory during aio_req allocation");
433
434	req->type = REQ_OPEN;
435	req->data = newSVsv (pathname);
436	req->dataptr = SvPV_nolen (req->data);
437	req->fd = flags;
438	req->mode = mode;
439	req->callback = SvREFCNT_inc (callback);
440
441	send_req (req);
442	}
443
444	void
445	aio_close(fh,callback=&PL_sv_undef)
446	InputStream fh
447	SV * callback
448	PROTOTYPE: $;$
449	ALIAS:
450	aio_close = REQ_CLOSE
451	aio_fsync = REQ_FSYNC
452	aio_fdatasync = REQ_FDATASYNC
453	CODE:
454	{
455	aio_req req;
456
457	Newz (0, req, 1, aio_cb);
458
459	if (!req)
460	croak ("out of memory during aio_req allocation");
461
462	req->type = ix;
463	req->fd = PerlIO_fileno (fh);
464	req->callback = SvREFCNT_inc (callback);
465
466	send_req (req);
467	}
468
469	void
470	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
471	InputStream fh
472	UV offset
473	IV length
474	SV * data
475	IV dataoffset
476	SV * callback
477	PROTOTYPE: $$$$$;$
478	CODE:
479	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
480
481	void
482	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
483	OutputStream fh
484	UV offset
485	IV length
486	SV * data
487	IV dataoffset
488	SV * callback
489	PROTOTYPE: $$$$$;$
490	CODE:
491	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
492
493	void
494	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
495	InputStream fh
496	UV offset
497	IV length
498	SV * callback
499	PROTOTYPE: $$$;$
500	CODE:
501	{
502	aio_req req;
503
504	if (length < 0)
505	croak ("length must not be negative");
506
507	Newz (0, req, 1, aio_cb);
508
509	if (!req)
510	croak ("out of memory during aio_req allocation");
511
512	req->type = REQ_READAHEAD;
513	req->fd = PerlIO_fileno (fh);
514	req->offset = offset;
515	req->length = length;
516	req->callback = SvREFCNT_inc (callback);
517
518	send_req (req);
519	}
520
521	void
522	aio_stat(fh_or_path,callback=&PL_sv_undef)
523	SV * fh_or_path
524	SV * callback
525	ALIAS:
526	aio_stat = REQ_STAT
527	aio_lstat = REQ_LSTAT
528	CODE:
529	{
530	aio_req req;
531
532	Newz (0, req, 1, aio_cb);
533
534	if (!req)
535	croak ("out of memory during aio_req allocation");
536
537	New (0, req->statdata, 1, Stat_t);
538
539	if (!req->statdata)
540	croak ("out of memory during aio_req->statdata allocation");
541
542	if (SvPOK (fh_or_path))
543	{
544	req->type = ix;
545	req->data = newSVsv (fh_or_path);
546	req->dataptr = SvPV_nolen (req->data);
547	}
548	else
549	{
550	req->type = REQ_FSTAT;
551	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
552	}
553
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_unlink(pathname,callback=&PL_sv_undef)
561	SV * pathname
562	SV * callback
563	CODE:
564	{
565	aio_req req;
566
567	Newz (0, req, 1, aio_cb);
568
569	if (!req)
570	croak ("out of memory during aio_req allocation");
571
572	req->type = REQ_UNLINK;
573	req->data = newSVsv (pathname);
574	req->dataptr = SvPV_nolen (req->data);
575	req->callback = SvREFCNT_inc (callback);
576
577	send_req (req);
578	}
579
580	void
581	flush()
582	PROTOTYPE:
583	CODE:
584	while (nreqs)
585	{
586	poll_wait ();
587	poll_cb ();
588	}
589
590	void
591	poll()	1301	poll()
592	PROTOTYPE:	1302	PROTOTYPE:
593	CODE:	1303	CODE:
594	if (nreqs)
595	{
596	poll_wait ();	1304	poll_wait ();
597	poll_cb ();	1305	RETVAL = poll_cb ();
598	}	1306	OUTPUT:
		1307	RETVAL
599		1308
600	int	1309	int
601	poll_fileno()	1310	poll_fileno()
602	PROTOTYPE:	1311	PROTOTYPE:
603	CODE:	1312	CODE:
604	RETVAL = respipe [0];	1313	RETVAL = s_epipe_fd (&respipe);
605	OUTPUT:	1314	OUTPUT:
606	RETVAL	1315	RETVAL
607		1316
608	int	1317	int
609	poll_cb(...)	1318	poll_cb(...)
…		…
615		1324
616	void	1325	void
617	poll_wait()	1326	poll_wait()
618	PROTOTYPE:	1327	PROTOTYPE:
619	CODE:	1328	CODE:
620	if (nreqs)
621	poll_wait ();	1329	poll_wait ();
622		1330
623	int	1331	int
624	nreqs()	1332	nreqs()
625	PROTOTYPE:	1333	PROTOTYPE:
626	CODE:	1334	CODE:
627	RETVAL = nreqs;	1335	RETVAL = eio_nreqs ();
628	OUTPUT:	1336	OUTPUT:
629	RETVAL	1337	RETVAL
630		1338
		1339	int
		1340	nready()
		1341	PROTOTYPE:
		1342	CODE:
		1343	RETVAL = eio_nready ();
		1344	OUTPUT:
		1345	RETVAL
		1346
		1347	int
		1348	npending()
		1349	PROTOTYPE:
		1350	CODE:
		1351	RETVAL = eio_npending ();
		1352	OUTPUT:
		1353	RETVAL
		1354
		1355	int
		1356	nthreads()
		1357	PROTOTYPE:
		1358	CODE:
		1359	RETVAL = eio_nthreads ();
		1360	OUTPUT:
		1361	RETVAL
		1362
		1363	int
		1364	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1365	PROTOTYPE: $$$$
		1366	CODE:
		1367	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1368	RETVAL = posix_fadvise (fh, offset, length, advice);
		1369	#else
		1370	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1371	#endif
		1372	OUTPUT:
		1373	RETVAL
		1374
		1375	ssize_t
		1376	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1377	PROTOTYPE: $$$$
		1378	CODE:
		1379	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1380	OUTPUT:
		1381	RETVAL
		1382
		1383	void
		1384	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1385	PROTOTYPE: $$$$$;$
		1386	PPCODE:
		1387	sv_unmagic (scalar, MMAP_MAGIC);
		1388	{
		1389	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1390	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1391	if (addr == (void *)-1)
		1392	XSRETURN_NO;
		1393
		1394	sv_force_normal (scalar);
		1395
		1396	/* we store the length in mg_obj, as namlen is I32 :/ */
		1397	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1398	->mg_obj = (SV *)length;
		1399
		1400	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1401
		1402	if (!(prot & PROT_WRITE))
		1403	SvREADONLY_on (scalar);
		1404
		1405	if (SvLEN (scalar))
		1406	Safefree (SvPVX (scalar));
		1407
		1408	SvPVX (scalar) = (char *)addr;
		1409	SvCUR_set (scalar, length);
		1410	SvLEN_set (scalar, 0);
		1411	SvPOK_only (scalar);
		1412
		1413	XSRETURN_YES;
		1414	}
		1415
		1416	void
		1417	munmap (SV *scalar)
		1418	PROTOTYPE: $
		1419	CODE:
		1420	sv_unmagic (scalar, MMAP_MAGIC);
		1421
		1422	int
		1423	mlockall (int flags)
		1424	PROTOTYPE: $
		1425	CODE:
		1426	#if _POSIX_MEMLOCK
		1427	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1428	extern int mallopt (int, int);
		1429	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1430	#endif
		1431	mlockall (flags);
		1432	#else
		1433	RETVAL = -1;
		1434	errno = ENOSYS;
		1435	#endif
		1436	OUTPUT:
		1437	RETVAL
		1438
		1439	int
		1440	munlockall ()
		1441	PROTOTYPE:
		1442	CODE:
		1443	#if _POSIX_MEMLOCK
		1444	munlockall ();
		1445	#else
		1446	RETVAL = -1;
		1447	errno = ENOSYS;
		1448	#endif
		1449	OUTPUT:
		1450	RETVAL
		1451
		1452	void _on_next_submit (SV *cb)
		1453	CODE:
		1454	SvREFCNT_dec (on_next_submit);
		1455	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1456
		1457	PROTOTYPES: DISABLE
		1458
		1459	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1460
		1461	void
		1462	cancel (aio_req_ornot req)
		1463	CODE:
		1464	eio_cancel (req);
		1465
		1466	void
		1467	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1468	PPCODE:
		1469	{
		1470	if (GIMME_V != G_VOID)
		1471	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1472
		1473	if (items > 1)
		1474	{
		1475	SV *cb_cv =get_cb (callback);
		1476
		1477	SvREFCNT_dec (req->callback);
		1478	req->callback = SvREFCNT_inc (cb_cv);
		1479	}
		1480	}
		1481
		1482	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1483
		1484	void
		1485	add (aio_req grp, ...)
		1486	PPCODE:
		1487	{
		1488	int i;
		1489
		1490	if (grp->int1 == 2)
		1491	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1492
		1493	for (i = 1; i < items; ++i )
		1494	{
		1495	aio_req req;
		1496
		1497	if (GIMME_V != G_VOID)
		1498	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1499
		1500	req = SvAIO_REQ (ST (i));
		1501
		1502	if (req)
		1503	eio_grp_add (grp, req);
		1504	}
		1505	}
		1506
		1507	void
		1508	cancel_subs (aio_req_ornot req)
		1509	CODE:
		1510	req_cancel_subs (req);
		1511
		1512	void
		1513	result (aio_req grp, ...)
		1514	CODE:
		1515	{
		1516	int i;
		1517	AV *av;
		1518
		1519	grp->errorno = errno;
		1520
		1521	av = newAV ();
		1522	av_extend (av, items - 1);
		1523
		1524	for (i = 1; i < items; ++i )
		1525	av_push (av, newSVsv (ST (i)));
		1526
		1527	SvREFCNT_dec (grp->sv1);
		1528	grp->sv1 = (SV *)av;
		1529	}
		1530
		1531	void
		1532	errno (aio_req grp, int errorno = errno)
		1533	CODE:
		1534	grp->errorno = errorno;
		1535
		1536	void
		1537	limit (aio_req grp, int limit)
		1538	CODE:
		1539	eio_grp_limit (grp, limit);
		1540
		1541	void
		1542	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1543	CODE:
		1544	{
		1545	SvREFCNT_dec (grp->sv2);
		1546	grp->sv2 = newSVsv (callback);
		1547	grp->feed = aio_grp_feed;
		1548
		1549	if (grp->int2 <= 0)
		1550	grp->int2 = 2;
		1551
		1552	eio_grp_limit (grp, grp->int2);
		1553	}
		1554

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