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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs.
Revision 1.175 by root, Wed Dec 1 04:43:12 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	#include <endian.h>
12		20
13	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
14	#include <sys/syscall.h>	22	# include <sys/mman.h>
		23	#endif
15		24
16	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
17	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
18	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
19		27
20	#if __ia64	28	#ifdef _WIN32
21	# 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
22	#else	66	#else
23	# 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	#endif
		128	#ifndef POSIX_FADV_SEQUENTIAL
		129	# define POSIX_FADV_SEQUENTIAL 0
		130	#endif
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134	#ifndef POSIX_FADV_NOREUSE
		135	# define POSIX_FADV_NOREUSE 0
		136	#endif
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140	#ifndef POSIX_FADV_DONTNEED
		141	# define POSIX_FADV_DONTNEED 0
		142	#endif
		143
		144	#if !HAVE_POSIX_FADVISE
		145	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#ifndef POSIX_MADV_NORMAL
		149	# define POSIX_MADV_NORMAL 0
		150	#endif
		151	#ifndef POSIX_MADV_SEQUENTIAL
		152	# define POSIX_MADV_SEQUENTIAL 0
		153	#endif
		154	#ifndef POSIX_MADV_RANDOM
		155	# define POSIX_MADV_RANDOM 0
		156	#endif
		157	#ifndef POSIX_MADV_WILLNEED
		158	# define POSIX_MADV_WILLNEED 0
		159	#endif
		160	#ifndef POSIX_MADV_DONTNEED
		161	# define POSIX_MADV_DONTNEED 0
		162	#endif
		163
		164	#if !HAVE_POSIX_MADVISE
		165	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		166	#endif
		167
		168	#ifndef PROT_NONE
		169	# define PROT_NONE 0
		170	#endif
		171	#ifndef PROT_READ
		172	# define PROT_READ 0
		173	#endif
		174	#ifndef PROT_WRITE
		175	# define PROT_READ 0
		176	#endif
		177	#ifndef PROT_EXEC
		178	# define PROT_EXEC 0
		179	#endif
		180
		181	#ifndef ST_NODEV
		182	# define ST_NODEV 0
		183	#endif
		184	#ifndef ST_NOEXEC
		185	# define ST_NOEXEC 0
		186	#endif
		187	#ifndef ST_SYNCHRONOUS
		188	# define ST_SYNCHRONOUS 0
		189	#endif
		190	#ifndef ST_MANDLOCK
		191	# define ST_MANDLOCK 0
		192	#endif
		193	#ifndef ST_WRITE
		194	# define ST_WRITE 0
		195	#endif
		196	#ifndef ST_APPEND
		197	# define ST_APPEND 0
		198	#endif
		199	#ifndef ST_IMMUTABLE
		200	# define ST_IMMUTABLE 0
		201	#endif
		202	#ifndef ST_NOATIME
		203	# define ST_NOATIME 0
		204	#endif
		205	#ifndef ST_NODIRATIME
		206	# define ST_NODIRATIME 0
		207	#endif
		208	#ifndef ST_RELATIME
		209	# define ST_RELATIME 0
		210	#endif
		211
		212	#ifndef MAP_ANONYMOUS
		213	# ifdef MAP_ANON
		214	# define MAP_ANONYMOUS MAP_ANON
		215	# else
		216	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
24	#endif	217	# endif
		218	#endif
		219	#ifndef MAP_HUGETLB
		220	# define MAP_HUGETLB 0
		221	#endif
		222	#ifndef MAP_LOCKED
		223	# define MAP_LOCKED 0
		224	#endif
		225	#ifndef MAP_NORESERVE
		226	# define MAP_NORESERVE 0
		227	#endif
		228	#ifndef MAP_POPULATE
		229	# define MAP_POPULATE 0
		230	#endif
		231	#ifndef MAP_NONBLOCK
		232	# define MAP_NONBLOCK 0
		233	#endif
		234
		235	#ifndef PAGESIZE
		236	# define PAGESIZE sysconf (_SC_PAGESIZE)
		237	#endif
		238
		239	static int req_invoke (eio_req *req);
		240	#define EIO_FINISH(req) req_invoke (req)
		241	static void req_destroy (eio_req *grp);
		242	#define EIO_DESTROY(req) req_destroy (req)
25		243
26	enum {	244	enum {
27	REQ_QUIT,	245	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
28	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
31	REQ_FSYNC, REQ_FDATASYNC,
32	};	246	};
33		247
34	typedef struct aio_cb {	248	#include "libeio/eio.c"
35	struct aio_cb *volatile next;
36		249
37	int type;
38
39	int fd;
40	off_t offset;
41	size_t length;
42	ssize_t result;
43	mode_t mode; /* open */
44	int errorno;
45	SV *data, *callback;
46	void *dataptr;
47	STRLEN dataoffset;
48
49	Stat_t *statdata;
50	} aio_cb;
51
52	typedef aio_cb *aio_req;	250	typedef eio_req *aio_req;
		251	typedef eio_req *aio_req_ornot;
53		252
54	static int started;	253	static SV *on_next_submit;
55	static int nreqs;	254	static int next_pri = EIO_PRI_DEFAULT;
56	static int max_outstanding = 1<<30;	255	static int max_outstanding;
57	static int respipe [2];
58		256
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	257	static s_epipe respipe;
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		258
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	259	static void req_destroy (aio_req req);
64	static volatile aio_req ress, rese; /* queue start, queue end */	260	static void req_cancel (aio_req req);
65		261
66	static void	262	static void want_poll (void)
67	poll_wait ()
68	{	263	{
69	if (!nreqs)	264	/* write a dummy byte to the pipe so fh becomes ready */
70	return;	265	s_epipe_signal (&respipe);
71
72	fd_set rfd;
73	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);
75
76	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	266	}
78		267
79	static int	268	static void done_poll (void)
80	poll_cb ()
81	{	269	{
82	dSP;
83	int count = 0;
84	aio_req req;
85
86	{
87	/* read and signals sent by the worker threads */	270	/* read any signals sent by the worker threads */
88	char buf [32];	271	s_epipe_drain (&respipe);
89	while (read (respipe [0], buf, 32) > 0)	272	}
90	;
91	}
92		273
93	for (;;)	274	/* must be called at most once */
		275	static SV *req_sv (aio_req req, HV *stash)
		276	{
		277	if (!req->self)
94	{	278	{
95	pthread_mutex_lock (&reslock);	279	req->self = (SV *)newHV ();
		280	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		281	}
96		282
97	req = ress;	283	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		284	}
98		285
99	if (ress)	286	static aio_req SvAIO_REQ (SV *sv)
		287	{
		288	MAGIC *mg;
		289
		290	if (!SvROK (sv)
		291	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		292	&& SvSTASH (SvRV (sv)) != aio_req_stash
		293	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		294	croak ("object of class IO::AIO::REQ expected");
		295
		296	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		297
		298	return mg ? (aio_req)mg->mg_ptr : 0;
		299	}
		300
		301	static void aio_grp_feed (aio_req grp)
		302	{
		303	if (grp->sv2 && SvOK (grp->sv2))
		304	{
		305	dSP;
		306
		307	ENTER;
		308	SAVETMPS;
		309	PUSHMARK (SP);
		310	XPUSHs (req_sv (grp, aio_grp_stash));
		311	PUTBACK;
		312	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		313	SPAGAIN;
		314	FREETMPS;
		315	LEAVE;
		316	}
		317	}
		318
		319	static void req_submit (eio_req *req)
		320	{
		321	eio_submit (req);
		322
		323	if (expect_false (on_next_submit))
		324	{
		325	dSP;
		326	SV *cb = sv_2mortal (on_next_submit);
		327
		328	on_next_submit = 0;
		329
		330	PUSHMARK (SP);
		331	PUTBACK;
		332	call_sv (cb, G_DISCARD | G_EVAL);
		333	}
		334	}
		335
		336	static int req_invoke (eio_req *req)
		337	{
		338	if (req->flags & FLAG_SV2_RO_OFF)
		339	SvREADONLY_off (req->sv2);
		340
		341	if (!EIO_CANCELLED (req) && req->callback)
		342	{
		343	dSP;
		344	static SV *sv_result_cache; /* caches the result integer SV */
		345	SV *sv_result;
		346
		347	ENTER;
		348	SAVETMPS;
		349	PUSHMARK (SP);
		350	EXTEND (SP, 1);
		351
		352	/* do not recreate the result IV from scratch each time */
		353	if (expect_true (sv_result_cache))
100	{	354	{
101	ress = ress->next;	355	sv_result = sv_result_cache; sv_result_cache = 0;
102	if (!ress) rese = 0;	356	SvIV_set (sv_result, req->result);
103	}
104
105	pthread_mutex_unlock (&reslock);
106
107	if (!req)
108	break;
109
110	nreqs--;
111
112	if (req->type == REQ_QUIT)
113	started--;
114	else
115	{
116	int errorno = errno;
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}
134
135	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137
138	if (req->type == REQ_OPEN)
139	{
140	/* convert fd to fh */
141	SV *fh;
142
143	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145	SPAGAIN;
146
147	fh = POPs;
148
149	PUSHMARK (SP);
150	XPUSHs (fh);
151	}
152
153	PUTBACK;
154	call_sv (req->callback, G_VOID | G_EVAL);
155	SPAGAIN;
156
157	if (req->callback)
158	SvREFCNT_dec (req->callback);
159
160	errno = errorno;
161	count++;
162	}
163
164	Safefree (req);
165	}
166
167	return count;
168	}
169
170	static void *aio_proc(void *arg);
171
172	static void
173	start_thread (void)
174	{
175	sigset_t fullsigset, oldsigset;
176	pthread_t tid;
177	pthread_attr_t attr;
178
179	pthread_attr_init (&attr);
180	pthread_attr_setstacksize (&attr, STACKSIZE);
181	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182
183	sigfillset (&fullsigset);
184	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185
186	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
187	started++;
188
189	sigprocmask (SIG_SETMASK, &oldsigset, 0);
190	}
191
192	static void
193	send_req (aio_req req)
194	{
195	nreqs++;
196
197	pthread_mutex_lock (&reqlock);
198
199	req->next = 0;
200
201	if (reqe)
202	{
203	reqe->next = req;
204	reqe = req;
205	}
206	else
207	reqe = reqs = req;
208
209	pthread_cond_signal (&reqwait);
210	pthread_mutex_unlock (&reqlock);
211
212	while (nreqs > max_outstanding)
213	{
214	poll_wait ();
215	poll_cb ();
216	}
217	}
218
219	static void
220	end_thread (void)
221	{
222	aio_req req;
223	New (0, req, 1, aio_cb);
224	req->type = REQ_QUIT;
225
226	send_req (req);
227	}
228
229	static void
230	read_write (int dowrite, int fd, off_t offset, size_t length,
231	SV *data, STRLEN dataoffset, SV *callback)
232	{
233	aio_req req;
234	STRLEN svlen;
235	char *svptr = SvPV (data, svlen);
236
237	SvUPGRADE (data, SVt_PV);
238	SvPOK_on (data);
239
240	if (dataoffset < 0)
241	dataoffset += svlen;
242
243	if (dataoffset < 0 || dataoffset > svlen)
244	croak ("data offset outside of string");
245
246	if (dowrite)
247	{
248	/* write: check length and adjust. */
249	if (length < 0 || length + dataoffset > svlen)
250	length = svlen - dataoffset;
251	}
252	else
253	{
254	/* read: grow scalar as necessary */
255	svptr = SvGROW (data, length + dataoffset);
256	}
257
258	if (length < 0)
259	croak ("length must not be negative");
260
261	Newz (0, req, 1, aio_cb);
262
263	if (!req)
264	croak ("out of memory during aio_req allocation");
265
266	req->type = dowrite ? REQ_WRITE : REQ_READ;
267	req->fd = fd;
268	req->offset = offset;
269	req->length = length;
270	req->data = SvREFCNT_inc (data);
271	req->dataptr = (char *)svptr + dataoffset;
272	req->callback = SvREFCNT_inc (callback);
273
274	send_req (req);
275	}
276
277	static void *
278	aio_proc (void *thr_arg)
279	{
280	aio_req req;
281	int type;
282
283	do
284	{
285	pthread_mutex_lock (&reqlock);
286
287	for (;;)
288	{
289	req = reqs;
290
291	if (reqs)
292	{
293	reqs = reqs->next;
294	if (!reqs) reqe = 0;
295	}
296
297	if (req)
298	break;
299
300	pthread_cond_wait (&reqwait, &reqlock);
301	}
302
303	pthread_mutex_unlock (&reqlock);
304
305	errno = 0; /* strictly unnecessary */
306
307	type = req->type;
308
309	switch (type)
310	{
311	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
312	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
313	#if SYS_readahead
314	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315	#else
316	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317	#endif
318
319	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322
323	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324	case REQ_CLOSE: req->result = close (req->fd); break;
325	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
326
327	case REQ_FSYNC: req->result = fsync (req->fd); break;
328	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
329
330	case REQ_QUIT:
331	break;
332
333	default:
334	req->result = ENOSYS;
335	break;
336	}
337
338	req->errorno = errno;
339
340	pthread_mutex_lock (&reslock);
341
342	req->next = 0;
343
344	if (rese)
345	{
346	rese->next = req;
347	rese = req;
348	}	357	}
349	else	358	else
350	{	359	{
351	rese = ress = req;	360	sv_result = newSViv (req->result);
352		361	SvREADONLY_on (sv_result);
353	/* write a dummy byte to the pipe so fh becomes ready */
354	write (respipe [1], &respipe, 1);
355	}	362	}
356		363
357	pthread_mutex_unlock (&reslock);	364	switch (req->type)
		365	{
		366	case EIO_READDIR:
		367	{
		368	SV *rv = &PL_sv_undef;
		369
		370	if (req->result >= 0)
		371	{
		372	int i;
		373	char *names = (char *)req->ptr2;
		374	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		375	AV *av = newAV ();
		376
		377	av_extend (av, req->result - 1);
		378
		379	for (i = 0; i < req->result; ++i)
		380	{
		381	if (req->int1 & EIO_READDIR_DENTS)
		382	{
		383	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		384
		385	if (req->int1 & EIO_READDIR_CUSTOM2)
		386	{
		387	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		388	AV *avent = newAV ();
		389
		390	av_extend (avent, 2);
		391
		392	if (!sv_type [ent->type])
		393	{
		394	sv_type [ent->type] = newSViv (ent->type);
		395	SvREADONLY_on (sv_type [ent->type]);
		396	}
		397
		398	av_store (avent, 0, namesv);
		399	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		400	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		401
		402	av_store (av, i, newRV_noinc ((SV *)avent));
		403	}
		404	else
		405	av_store (av, i, namesv);
		406
		407	++ent;
		408	}
		409	else
		410	{
		411	SV *name = newSVpv (names, 0);
		412	av_store (av, i, name);
		413	names += SvCUR (name) + 1;
		414	}
		415	}
		416
		417	rv = sv_2mortal (newRV_noinc ((SV *)av));
		418	}
		419
		420	PUSHs (rv);
		421
		422	if (req->int1 & EIO_READDIR_CUSTOM1)
		423	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		424	}
		425	break;
		426
		427	case EIO_OPEN:
		428	{
		429	/* convert fd to fh */
		430	SV *fh = &PL_sv_undef;
		431
		432	if (req->result >= 0)
		433	{
		434	GV *gv = (GV *)sv_newmortal ();
		435	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		436	char sym [64];
		437	int symlen;
		438
		439	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		440	gv_init (gv, aio_stash, sym, symlen, 0);
		441
		442	symlen = snprintf (
		443	sym,
		444	sizeof (sym),
		445	"%s&=%d",
		446	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		447	(int)req->result
		448	);
		449
		450	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		451	fh = (SV *)gv;
		452	}
		453
		454	PUSHs (fh);
		455	}
		456	break;
		457
		458	case EIO_STATVFS:
		459	case EIO_FSTATVFS:
		460	{
		461	SV *rv = &PL_sv_undef;
		462
		463	if (req->result >= 0)
		464	{
		465	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		466	HV *hv = newHV ();
		467
		468	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		469
		470	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		471	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		472	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		473	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		474	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		475	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		476	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		477	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		478	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		479	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		480	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		481	}
		482
		483	PUSHs (rv);
		484	}
		485
		486	break;
		487
		488	case EIO_GROUP:
		489	req->int1 = 2; /* mark group as finished */
		490
		491	if (req->sv1)
		492	{
		493	int i;
		494	AV *av = (AV *)req->sv1;
		495
		496	EXTEND (SP, AvFILL (av) + 1);
		497	for (i = 0; i <= AvFILL (av); ++i)
		498	PUSHs (*av_fetch (av, i, 0));
		499	}
		500	break;
		501
		502	case EIO_NOP:
		503	case EIO_BUSY:
		504	break;
		505
		506	case EIO_READLINK:
		507	if (req->result > 0)
		508	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		509	break;
		510
		511	case EIO_STAT:
		512	case EIO_LSTAT:
		513	case EIO_FSTAT:
		514	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		515	PL_laststatval = req->result;
		516	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		517	PUSHs (sv_result);
		518	break;
		519
		520	case EIO_READ:
		521	{
		522	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		523	*SvEND (req->sv2) = 0;
		524	SvPOK_only (req->sv2);
		525	SvSETMAGIC (req->sv2);
		526	PUSHs (sv_result);
		527	}
		528	break;
		529
		530	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		531	if (req->result > 0)
		532	SvIV_set (sv_result, 0);
		533	/* FALLTHROUGH */
		534
		535	default:
		536	PUSHs (sv_result);
		537	break;
		538	}
		539
		540	errno = req->errorno;
		541
		542	PUTBACK;
		543	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		544	SPAGAIN;
		545
		546	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		547	SvREFCNT_dec (sv_result);
		548	else
		549	sv_result_cache = sv_result;
		550
		551	FREETMPS;
		552	LEAVE;
		553
		554	PUTBACK;
358	}	555	}
359	while (type != REQ_QUIT);	556
		557	return !!SvTRUE (ERRSV);
		558	}
		559
		560	static void req_destroy (aio_req req)
		561	{
		562	if (req->self)
		563	{
		564	sv_unmagic (req->self, PERL_MAGIC_ext);
		565	SvREFCNT_dec (req->self);
		566	}
		567
		568	SvREFCNT_dec (req->sv1);
		569	SvREFCNT_dec (req->sv2);
		570	SvREFCNT_dec (req->callback);
		571
		572	Safefree (req);
		573	}
		574
		575	static void req_cancel_subs (aio_req grp)
		576	{
		577	aio_req sub;
		578
		579	if (grp->type != EIO_GROUP)
		580	return;
		581
		582	SvREFCNT_dec (grp->sv2);
		583	grp->sv2 = 0;
		584
		585	eio_grp_cancel (grp);
		586	}
		587
		588	static void
		589	create_respipe (void)
		590	{
		591	if (s_epipe_renew (&respipe))
		592	croak ("IO::AIO: unable to initialize result pipe");
		593	}
		594
		595	static void poll_wait (void)
		596	{
		597	while (eio_nreqs ())
		598	{
		599	int size;
		600
		601	X_LOCK (reslock);
		602	size = res_queue.size;
		603	X_UNLOCK (reslock);
		604
		605	if (size)
		606	return;
		607
		608	etp_maybe_start_thread ();
		609
		610	s_epipe_wait (&respipe);
		611	}
		612	}
		613
		614	static int poll_cb (void)
		615	{
		616	for (;;)
		617	{
		618	int res = eio_poll ();
		619
		620	if (res > 0)
		621	croak (0);
		622
		623	if (!max_outstanding || max_outstanding > eio_nreqs ())
		624	return res;
		625
		626	poll_wait ();
		627	}
		628	}
		629
		630	static void atfork_child (void)
		631	{
		632	create_respipe ();
		633	}
		634
		635	/*****************************************************************************/
		636
		637	#if !_POSIX_MAPPED_FILES
		638	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		639	# define munmap(addr,length) (errno = ENOSYS, -1)
		640	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		641	# define PROT_NONE 0
		642	# define PROT_WRITE 0
		643	# define MAP_PRIVATE 0
		644	# define MAP_SHARED 0
		645	# define MAP_FIXED 0
		646	#endif
		647
		648	#define MMAP_MAGIC PERL_MAGIC_ext
		649
		650	static int
		651	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		652	{
		653	int old_errno = errno;
		654	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		655	errno = old_errno;
		656
		657	mg->mg_obj = 0; /* just in case */
		658
		659	SvREADONLY_off (sv);
		660
		661	if (SvPVX (sv) != mg->mg_ptr)
		662	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		663
		664	SvCUR_set (sv, 0);
		665	SvPVX (sv) = 0;
		666	SvOK_off (sv);
360		667
361	return 0;	668	return 0;
362	}	669	}
363		670
		671	static MGVTBL mmap_vtbl = {
		672	0, 0, 0, 0, mmap_free
		673	};
		674
		675	/*****************************************************************************/
		676
		677	static SV *
		678	get_cb (SV *cb_sv)
		679	{
		680	SvGETMAGIC (cb_sv);
		681	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		682	}
		683
		684	#define dREQ \
		685	SV *cb_cv; \
		686	aio_req req; \
		687	int req_pri = next_pri; \
		688	next_pri = EIO_PRI_DEFAULT; \
		689	\
		690	cb_cv = get_cb (callback); \
		691	\
		692	Newz (0, req, 1, eio_req); \
		693	if (!req) \
		694	croak ("out of memory during eio_req allocation"); \
		695	\
		696	req->callback = SvREFCNT_inc (cb_cv); \
		697	req->pri = req_pri
		698
		699	#define REQ_SEND \
		700	PUTBACK; \
		701	req_submit (req); \
		702	SPAGAIN; \
		703	\
		704	if (GIMME_V != G_VOID) \
		705	XPUSHs (req_sv (req, aio_req_stash));
		706
364	MODULE = IO::AIO PACKAGE = IO::AIO	707	MODULE = IO::AIO PACKAGE = IO::AIO
365		708
		709	PROTOTYPES: ENABLE
		710
366	BOOT:	711	BOOT:
367	{	712	{
368	if (pipe (respipe))	713	static const struct {
369	croak ("unable to initialize result pipe");	714	const char *name;
		715	IV iv;
		716	} *civ, const_iv[] = {
		717	# define const_niv(name, value) { # name, (IV) value },
		718	# define const_iv(name) { # name, (IV) name },
		719	# define const_eio(name) { # name, (IV) EIO_ ## name },
		720	const_iv (EXDEV)
		721	const_iv (ENOSYS)
		722	const_iv (O_RDONLY)
		723	const_iv (O_WRONLY)
		724	const_iv (O_RDWR)
		725	const_iv (O_CREAT)
		726	const_iv (O_TRUNC)
		727	const_iv (O_EXCL)
		728	const_iv (O_APPEND)
		729	#ifndef _WIN32
		730	const_iv (S_IFIFO)
		731	#endif
		732	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		733	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		734	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		735	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		736	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		737	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
370		738
371	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	739	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
372	croak ("cannot set result pipe to nonblocking mode");	740	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		741	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		742	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		743	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
373		744
374	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	745	const_iv (ST_RDONLY)
375	croak ("cannot set result pipe to nonblocking mode");	746	const_iv (ST_NOSUID)
376	}	747	const_iv (ST_NODEV)
		748	const_iv (ST_NOEXEC)
		749	const_iv (ST_SYNCHRONOUS)
		750	const_iv (ST_MANDLOCK)
		751	const_iv (ST_WRITE)
		752	const_iv (ST_APPEND)
		753	const_iv (ST_IMMUTABLE)
		754	const_iv (ST_NOATIME)
		755	const_iv (ST_NODIRATIME)
		756	const_iv (ST_RELATIME)
377		757
		758	const_iv (PROT_NONE)
		759	const_iv (PROT_EXEC)
		760	const_iv (PROT_READ)
		761	const_iv (PROT_WRITE)
		762
		763	/*const_iv (MAP_FIXED)*/
		764	const_iv (MAP_PRIVATE)
		765	const_iv (MAP_SHARED)
		766	const_iv (MAP_ANONYMOUS)
		767
		768	/* linuxish */
		769	const_iv (MAP_HUGETLB)
		770	const_iv (MAP_LOCKED)
		771	const_iv (MAP_NORESERVE)
		772	const_iv (MAP_POPULATE)
		773	const_iv (MAP_NONBLOCK)
		774
		775	const_eio (MCL_FUTURE)
		776	const_eio (MCL_CURRENT)
		777
		778	const_eio (MS_ASYNC)
		779	const_eio (MS_INVALIDATE)
		780	const_eio (MS_SYNC)
		781
		782	const_eio (MT_MODIFY)
		783
		784	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		785	const_eio (SYNC_FILE_RANGE_WRITE)
		786	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		787
		788	const_eio (READDIR_DENTS)
		789	const_eio (READDIR_DIRS_FIRST)
		790	const_eio (READDIR_STAT_ORDER)
		791	const_eio (READDIR_FOUND_UNKNOWN)
		792
		793	const_eio (DT_UNKNOWN)
		794	const_eio (DT_FIFO)
		795	const_eio (DT_CHR)
		796	const_eio (DT_DIR)
		797	const_eio (DT_BLK)
		798	const_eio (DT_REG)
		799	const_eio (DT_LNK)
		800	const_eio (DT_SOCK)
		801	const_eio (DT_WHT)
		802	};
		803
		804	aio_stash = gv_stashpv ("IO::AIO" , 1);
		805	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		806	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		807
		808	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		809	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		810
		811	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		812
		813	create_respipe ();
		814
		815	if (eio_init (want_poll, done_poll) < 0)
		816	croak ("IO::AIO: unable to initialise eio library");
		817
		818	/* atfork child called in fifo order, so before eio's handler */
		819	X_THREAD_ATFORK (0, 0, atfork_child);
		820	}
		821
378	void	822	void
379	min_parallel(nthreads)	823	max_poll_reqs (int nreqs)
380	int nthreads
381	PROTOTYPE: $	824	PROTOTYPE: $
382	CODE:	825	CODE:
383	while (nthreads > started)	826	eio_set_max_poll_reqs (nreqs);
384	start_thread ();
385		827
386	void	828	void
387	max_parallel(nthreads)	829	max_poll_time (double nseconds)
388	int nthreads
389	PROTOTYPE: $	830	PROTOTYPE: $
390	CODE:	831	CODE:
		832	eio_set_max_poll_time (nseconds);
		833
		834	void
		835	min_parallel (int nthreads)
		836	PROTOTYPE: $
		837	CODE:
		838	eio_set_min_parallel (nthreads);
		839
		840	void
		841	max_parallel (int nthreads)
		842	PROTOTYPE: $
		843	CODE:
		844	eio_set_max_parallel (nthreads);
		845
		846	void
		847	max_idle (int nthreads)
		848	PROTOTYPE: $
		849	CODE:
		850	eio_set_max_idle (nthreads);
		851
		852	void
		853	max_outstanding (int maxreqs)
		854	PROTOTYPE: $
		855	CODE:
		856	max_outstanding = maxreqs;
		857
		858	void
		859	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		860	PPCODE:
391	{	861	{
392	int cur = started;	862	dREQ;
393	while (cur > nthreads)	863
394	{	864	req->type = EIO_OPEN;
395	end_thread ();	865	req->sv1 = newSVsv (pathname);
396	cur--;	866	req->ptr1 = SvPVbyte_nolen (req->sv1);
		867	req->int1 = flags;
		868	req->int2 = mode;
		869
		870	REQ_SEND;
		871	}
		872
		873	void
		874	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		875	ALIAS:
		876	aio_fsync = EIO_FSYNC
		877	aio_fdatasync = EIO_FDATASYNC
		878	PPCODE:
		879	{
		880	int fd = s_fileno_croak (fh, 0);
		881	dREQ;
		882
		883	req->type = ix;
		884	req->sv1 = newSVsv (fh);
		885	req->int1 = fd;
		886
		887	REQ_SEND (req);
		888	}
		889
		890	void
		891	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		892	PPCODE:
		893	{
		894	int fd = s_fileno_croak (fh, 0);
		895	dREQ;
		896
		897	req->type = EIO_SYNC_FILE_RANGE;
		898	req->sv1 = newSVsv (fh);
		899	req->int1 = fd;
		900	req->offs = offset;
		901	req->size = nbytes;
		902	req->int2 = flags;
		903
		904	REQ_SEND (req);
		905	}
		906
		907	void
		908	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		912	int fd = s_fileno_croak (fh, 0);
		913	dREQ;
		914
		915	if (close_pipe < 0)
		916	{
		917	int pipefd [2];
		918
		919	if (pipe (pipefd) < 0
		920	|| close (pipefd [1]) < 0
		921	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		922	abort (); /*D*/
		923
		924	close_pipe = pipefd [0];
397	}	925	}
398		926
399	while (started > nthreads)	927	req->type = EIO_DUP2;
		928	req->int1 = close_pipe;
		929	req->sv2 = newSVsv (fh);
		930	req->int2 = fd;
		931
		932	REQ_SEND (req);
		933	}
		934
		935	void
		936	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		937	ALIAS:
		938	aio_read = EIO_READ
		939	aio_write = EIO_WRITE
		940	PPCODE:
		941	{
		942	STRLEN svlen;
		943	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		944	char *svptr = SvPVbyte (data, svlen);
		945	UV len = SvUV (length);
		946
		947	if (dataoffset < 0)
		948	dataoffset += svlen;
		949
		950	if (dataoffset < 0 || dataoffset > svlen)
		951	croak ("dataoffset outside of data scalar");
		952
		953	if (ix == EIO_WRITE)
		954	{
		955	/* write: check length and adjust. */
		956	if (!SvOK (length) || len + dataoffset > svlen)
		957	len = svlen - dataoffset;
		958	}
		959	else
		960	{
		961	/* read: check type and grow scalar as necessary */
		962	SvUPGRADE (data, SVt_PV);
		963	svptr = SvGROW (data, len + dataoffset + 1);
		964	}
		965
		966	{
		967	dREQ;
		968
		969	req->type = ix;
		970	req->sv1 = newSVsv (fh);
		971	req->int1 = fd;
		972	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		973	req->size = len;
		974	req->sv2 = SvREFCNT_inc (data);
		975	req->ptr2 = (char *)svptr + dataoffset;
		976	req->stroffset = dataoffset;
		977
		978	if (!SvREADONLY (data))
		979	{
		980	SvREADONLY_on (data);
		981	req->flags |= FLAG_SV2_RO_OFF;
		982	}
		983
		984	REQ_SEND;
		985	}
		986	}
		987
		988	void
		989	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		990	PPCODE:
		991	{
		992	SV *data;
		993	dREQ;
		994
		995	req->type = EIO_READLINK;
		996	req->sv1 = newSVsv (path);
		997	req->ptr1 = SvPVbyte_nolen (req->sv1);
		998
		999	REQ_SEND;
		1000	}
		1001
		1002	void
		1003	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1004	PPCODE:
		1005	{
		1006	int ifd = s_fileno_croak (in_fh , 0);
		1007	int ofd = s_fileno_croak (out_fh, 1);
		1008	dREQ;
		1009
		1010	req->type = EIO_SENDFILE;
		1011	req->sv1 = newSVsv (out_fh);
		1012	req->int1 = ofd;
		1013	req->sv2 = newSVsv (in_fh);
		1014	req->int2 = ifd;
		1015	req->offs = in_offset;
		1016	req->size = length;
		1017
		1018	REQ_SEND;
		1019	}
		1020
		1021	void
		1022	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1023	PPCODE:
		1024	{
		1025	int fd = s_fileno_croak (fh, 0);
		1026	dREQ;
		1027
		1028	req->type = EIO_READAHEAD;
		1029	req->sv1 = newSVsv (fh);
		1030	req->int1 = fd;
		1031	req->offs = offset;
		1032	req->size = length;
		1033
		1034	REQ_SEND;
		1035	}
		1036
		1037	void
		1038	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1039	ALIAS:
		1040	aio_stat = EIO_STAT
		1041	aio_lstat = EIO_LSTAT
		1042	aio_statvfs = EIO_STATVFS
		1043	PPCODE:
		1044	{
		1045	dREQ;
		1046
		1047	req->sv1 = newSVsv (fh_or_path);
		1048
		1049	if (SvPOK (req->sv1))
		1050	{
		1051	req->type = ix;
		1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1053	}
		1054	else
		1055	{
		1056	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1057	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1058	}
		1059
		1060	REQ_SEND;
		1061	}
		1062
		1063	void
		1064	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1065	PPCODE:
		1066	{
		1067	dREQ;
		1068
		1069	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1070	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1071	req->sv1 = newSVsv (fh_or_path);
		1072
		1073	if (SvPOK (req->sv1))
		1074	{
		1075	req->type = EIO_UTIME;
		1076	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1077	}
		1078	else
		1079	{
		1080	req->type = EIO_FUTIME;
		1081	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1082	}
		1083
		1084	REQ_SEND;
		1085	}
		1086
		1087	void
		1088	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1089	PPCODE:
		1090	{
		1091	dREQ;
		1092
		1093	req->sv1 = newSVsv (fh_or_path);
		1094	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1095
		1096	if (SvPOK (req->sv1))
		1097	{
		1098	req->type = EIO_TRUNCATE;
		1099	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1100	}
		1101	else
		1102	{
		1103	req->type = EIO_FTRUNCATE;
		1104	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1105	}
		1106
		1107	REQ_SEND;
		1108	}
		1109
		1110	void
		1111	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1112	ALIAS:
		1113	aio_chmod = EIO_CHMOD
		1114	aio_mkdir = EIO_MKDIR
		1115	PPCODE:
		1116	{
		1117	dREQ;
		1118
		1119	req->int2 = mode;
		1120	req->sv1 = newSVsv (fh_or_path);
		1121
		1122	if (SvPOK (req->sv1))
		1123	{
		1124	req->type = ix;
		1125	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1126	}
		1127	else
		1128	{
		1129	req->type = EIO_FCHMOD;
		1130	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1131	}
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
		1137	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1138	PPCODE:
		1139	{
		1140	dREQ;
		1141
		1142	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1143	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1144	req->sv1 = newSVsv (fh_or_path);
		1145
		1146	if (SvPOK (req->sv1))
		1147	{
		1148	req->type = EIO_CHOWN;
		1149	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1150	}
		1151	else
		1152	{
		1153	req->type = EIO_FCHOWN;
		1154	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1155	}
		1156
		1157	REQ_SEND;
		1158	}
		1159
		1160	void
		1161	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1162	PPCODE:
		1163	{
		1164	dREQ;
		1165
		1166	req->type = EIO_READDIR;
		1167	req->sv1 = newSVsv (pathname);
		1168	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1169	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1170
		1171	if (flags & EIO_READDIR_DENTS)
		1172	req->int1 |= EIO_READDIR_CUSTOM2;
		1173
		1174	REQ_SEND;
		1175	}
		1176
		1177	void
		1178	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1179	ALIAS:
		1180	aio_unlink = EIO_UNLINK
		1181	aio_rmdir = EIO_RMDIR
		1182	aio_readdir = EIO_READDIR
		1183	PPCODE:
		1184	{
		1185	dREQ;
		1186
		1187	req->type = ix;
		1188	req->sv1 = newSVsv (pathname);
		1189	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1190
		1191	REQ_SEND;
		1192	}
		1193
		1194	void
		1195	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1196	ALIAS:
		1197	aio_link = EIO_LINK
		1198	aio_symlink = EIO_SYMLINK
		1199	aio_rename = EIO_RENAME
		1200	PPCODE:
		1201	{
		1202	dREQ;
		1203
		1204	req->type = ix;
		1205	req->sv1 = newSVsv (oldpath);
		1206	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1207	req->sv2 = newSVsv (newpath);
		1208	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1209
		1210	REQ_SEND;
		1211	}
		1212
		1213	void
		1214	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1215	PPCODE:
		1216	{
		1217	dREQ;
		1218
		1219	req->type = EIO_MKNOD;
		1220	req->sv1 = newSVsv (pathname);
		1221	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1222	req->int2 = (mode_t)mode;
		1223	req->offs = dev;
		1224
		1225	REQ_SEND;
		1226	}
		1227
		1228	void
		1229	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1230	ALIAS:
		1231	aio_mtouch = EIO_MTOUCH
		1232	aio_msync = EIO_MSYNC
		1233	PPCODE:
		1234	{
		1235	STRLEN svlen;
		1236	char *svptr = SvPVbyte (data, svlen);
		1237	UV len = SvUV (length);
		1238
		1239	if (offset < 0)
		1240	offset += svlen;
		1241
		1242	if (offset < 0 || offset > svlen)
		1243	croak ("offset outside of scalar");
		1244
		1245	if (!SvOK (length) || len + offset > svlen)
		1246	len = svlen - offset;
		1247
		1248	{
		1249	dREQ;
		1250
		1251	req->type = ix;
		1252	req->sv2 = SvREFCNT_inc (data);
		1253	req->ptr2 = (char *)svptr + offset;
		1254	req->size = len;
		1255	req->int1 = flags;
		1256
		1257	REQ_SEND;
		1258	}
		1259	}
		1260
		1261	void
		1262	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1263	PPCODE:
		1264	{
		1265	STRLEN svlen;
		1266	char *svptr = SvPVbyte (data, svlen);
		1267	UV len = SvUV (length);
		1268
		1269	if (offset < 0)
		1270	offset += svlen;
		1271
		1272	if (offset < 0 || offset > svlen)
		1273	croak ("offset outside of scalar");
		1274
		1275	if (!SvOK (length) || len + offset > svlen)
		1276	len = svlen - offset;
		1277
		1278	{
		1279	dREQ;
		1280
		1281	req->type = EIO_MLOCK;
		1282	req->sv2 = SvREFCNT_inc (data);
		1283	req->ptr2 = (char *)svptr + offset;
		1284	req->size = len;
		1285
		1286	REQ_SEND;
		1287	}
		1288	}
		1289
		1290	void
		1291	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1292	PPCODE:
		1293	{
		1294	dREQ;
		1295
		1296	req->type = EIO_MLOCKALL;
		1297	req->int1 = flags;
		1298
		1299	REQ_SEND;
		1300	}
		1301
		1302	void
		1303	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1304	PPCODE:
		1305	{
		1306	dREQ;
		1307
		1308	req->type = EIO_BUSY;
		1309	req->nv1 = delay < 0. ? 0. : delay;
		1310
		1311	REQ_SEND;
		1312	}
		1313
		1314	void
		1315	aio_group (SV *callback=&PL_sv_undef)
		1316	PPCODE:
		1317	{
		1318	dREQ;
		1319
		1320	req->type = EIO_GROUP;
		1321
		1322	req_submit (req);
		1323	XPUSHs (req_sv (req, aio_grp_stash));
		1324	}
		1325
		1326	void
		1327	aio_nop (SV *callback=&PL_sv_undef)
		1328	ALIAS:
		1329	aio_nop = EIO_NOP
		1330	aio_sync = EIO_SYNC
		1331	PPCODE:
		1332	{
		1333	dREQ;
		1334
		1335	req->type = ix;
		1336
		1337	REQ_SEND;
		1338	}
		1339
		1340	int
		1341	aioreq_pri (int pri = 0)
		1342	CODE:
		1343	RETVAL = next_pri;
		1344	if (items > 0)
		1345	{
		1346	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1347	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1348	next_pri = pri;
		1349	}
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	void
		1354	aioreq_nice (int nice = 0)
		1355	CODE:
		1356	nice = next_pri - nice;
		1357	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1358	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1359	next_pri = nice;
		1360
		1361	void
		1362	flush ()
		1363	CODE:
		1364	while (eio_nreqs ())
400	{	1365	{
401	poll_wait ();	1366	poll_wait ();
402	poll_cb ();	1367	poll_cb ();
403	}	1368	}
404	}
405		1369
406	int	1370	int
407	max_outstanding(nreqs)	1371	poll ()
408	int nreqs
409	PROTOTYPE: $
410	CODE:
411	RETVAL = max_outstanding;
412	max_outstanding = nreqs;
413
414	void
415	aio_open(pathname,flags,mode,callback)
416	SV * pathname
417	int flags
418	int mode
419	SV * callback
420	PROTOTYPE: $$$$
421	CODE:	1372	CODE:
422	{
423	aio_req req;
424
425	Newz (0, req, 1, aio_cb);
426
427	if (!req)
428	croak ("out of memory during aio_req allocation");
429
430	req->type = REQ_OPEN;
431	req->data = newSVsv (pathname);
432	req->dataptr = SvPV_nolen (req->data);
433	req->fd = flags;
434	req->mode = mode;
435	req->callback = SvREFCNT_inc (callback);
436
437	send_req (req);
438	}
439
440	void
441	aio_close(fh,callback)
442	InputStream fh
443	SV * callback
444	PROTOTYPE: $$
445	ALIAS:
446	aio_close = REQ_CLOSE
447	aio_fsync = REQ_FSYNC
448	aio_fdatasync = REQ_FDATASYNC
449	CODE:
450	{
451	aio_req req;
452
453	Newz (0, req, 1, aio_cb);
454
455	if (!req)
456	croak ("out of memory during aio_req allocation");
457
458	req->type = ix;
459	req->fd = PerlIO_fileno (fh);
460	req->callback = SvREFCNT_inc (callback);
461
462	send_req (req);
463	}
464
465	void
466	aio_read(fh,offset,length,data,dataoffset,callback)
467	InputStream fh
468	UV offset
469	IV length
470	SV * data
471	IV dataoffset
472	SV * callback
473	PROTOTYPE: $$$$$$
474	CODE:
475	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477	void
478	aio_write(fh,offset,length,data,dataoffset,callback)
479	OutputStream fh
480	UV offset
481	IV length
482	SV * data
483	IV dataoffset
484	SV * callback
485	PROTOTYPE: $$$$$$
486	CODE:
487	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489	void
490	aio_readahead(fh,offset,length,callback)
491	InputStream fh
492	UV offset
493	IV length
494	SV * callback
495	PROTOTYPE: $$$$
496	CODE:
497	{
498	aio_req req;
499
500	if (length < 0)
501	croak ("length must not be negative");
502
503	Newz (0, req, 1, aio_cb);
504
505	if (!req)
506	croak ("out of memory during aio_req allocation");
507
508	req->type = REQ_READAHEAD;
509	req->fd = PerlIO_fileno (fh);
510	req->offset = offset;
511	req->length = length;
512	req->callback = SvREFCNT_inc (callback);
513
514	send_req (req);
515	}
516
517	void
518	aio_stat(fh_or_path,callback)
519	SV * fh_or_path
520	SV * callback
521	PROTOTYPE: $$
522	ALIAS:
523	aio_lstat = 1
524	CODE:
525	{
526	aio_req req;
527
528	Newz (0, req, 1, aio_cb);
529
530	if (!req)
531	croak ("out of memory during aio_req allocation");
532
533	New (0, req->statdata, 1, Stat_t);
534
535	if (!req->statdata)
536	croak ("out of memory during aio_req->statdata allocation");
537
538	if (SvPOK (fh_or_path))
539	{
540	req->type = ix ? REQ_LSTAT : REQ_STAT;
541	req->data = newSVsv (fh_or_path);
542	req->dataptr = SvPV_nolen (req->data);
543	}
544	else
545	{
546	req->type = REQ_FSTAT;
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}
549
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);
553	}
554
555	void
556	aio_unlink(pathname,callback)
557	SV * pathname
558	SV * callback
559	PROTOTYPE: $$
560	CODE:
561	{
562	aio_req req;
563
564	Newz (0, req, 1, aio_cb);
565
566	if (!req)
567	croak ("out of memory during aio_req allocation");
568
569	req->type = REQ_UNLINK;
570	req->data = newSVsv (pathname);
571	req->dataptr = SvPV_nolen (req->data);
572	req->callback = SvREFCNT_inc (callback);
573
574	send_req (req);
575	}
576
577	void
578	flush()
579	PROTOTYPE:
580	CODE:
581	while (nreqs)
582	{
583	poll_wait ();	1373	poll_wait ();
584	poll_cb ();	1374	RETVAL = poll_cb ();
585	}
586
587	int
588	poll_fileno()
589	PROTOTYPE:
590	CODE:
591	RETVAL = respipe [0];
592	OUTPUT:	1375	OUTPUT:
593	RETVAL	1376	RETVAL
594		1377
595	int	1378	int
		1379	poll_fileno ()
		1380	CODE:
		1381	RETVAL = s_epipe_fd (&respipe);
		1382	OUTPUT:
		1383	RETVAL
		1384
		1385	int
596	poll_cb(...)	1386	poll_cb (...)
597	PROTOTYPE:	1387	PROTOTYPE:
598	CODE:	1388	CODE:
599	RETVAL = poll_cb ();	1389	RETVAL = poll_cb ();
600	OUTPUT:	1390	OUTPUT:
601	RETVAL	1391	RETVAL
602		1392
603	void	1393	void
604	poll_wait()	1394	poll_wait ()
605	PROTOTYPE:
606	CODE:	1395	CODE:
607	if (nreqs)
608	poll_wait ();	1396	poll_wait ();
609		1397
610	int	1398	int
611	nreqs()	1399	nreqs ()
612	PROTOTYPE:
613	CODE:	1400	CODE:
614	RETVAL = nreqs;	1401	RETVAL = eio_nreqs ();
615	OUTPUT:	1402	OUTPUT:
616	RETVAL	1403	RETVAL
617		1404
		1405	int
		1406	nready ()
		1407	CODE:
		1408	RETVAL = eio_nready ();
		1409	OUTPUT:
		1410	RETVAL
		1411
		1412	int
		1413	npending ()
		1414	CODE:
		1415	RETVAL = eio_npending ();
		1416	OUTPUT:
		1417	RETVAL
		1418
		1419	int
		1420	nthreads ()
		1421	CODE:
		1422	RETVAL = eio_nthreads ();
		1423	OUTPUT:
		1424	RETVAL
		1425
		1426	int
		1427	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1428	CODE:
		1429	RETVAL = posix_fadvise (fh, offset, length, advice);
		1430	OUTPUT:
		1431	RETVAL
		1432
		1433	ssize_t
		1434	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1435	CODE:
		1436	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1437	OUTPUT:
		1438	RETVAL
		1439
		1440	void
		1441	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1442	PPCODE:
		1443	sv_unmagic (scalar, MMAP_MAGIC);
		1444	{
		1445	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1446	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1447	if (addr == (void *)-1)
		1448	XSRETURN_NO;
		1449
		1450	sv_force_normal (scalar);
		1451
		1452	/* we store the length in mg_obj, as namlen is I32 :/ */
		1453	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1454	->mg_obj = (SV *)length;
		1455
		1456	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1457
		1458	if (!(prot & PROT_WRITE))
		1459	SvREADONLY_on (scalar);
		1460
		1461	if (SvLEN (scalar))
		1462	Safefree (SvPVX (scalar));
		1463
		1464	SvPVX (scalar) = (char *)addr;
		1465	SvCUR_set (scalar, length);
		1466	SvLEN_set (scalar, 0);
		1467	SvPOK_only (scalar);
		1468
		1469	XSRETURN_YES;
		1470	}
		1471
		1472	void
		1473	munmap (SV *scalar)
		1474	CODE:
		1475	sv_unmagic (scalar, MMAP_MAGIC);
		1476
		1477	int
		1478	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1479	ALIAS:
		1480	mprotect = 1
		1481	CODE:
		1482	{
		1483	STRLEN svlen;
		1484	void *addr = SvPVbyte (scalar, svlen);
		1485	size_t len = SvUV (length);
		1486
		1487	if (offset < 0)
		1488	offset += svlen;
		1489
		1490	if (offset < 0 || offset > svlen)
		1491	croak ("offset outside of scalar");
		1492
		1493	if (!SvOK (length) || len + offset > svlen)
		1494	len = svlen - offset;
		1495
		1496	addr = (void *)(((intptr_t)addr) + offset);
		1497	eio_page_align (&addr, &len);
		1498
		1499	switch (ix)
		1500	{
		1501	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1502	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1503	}
		1504	}
		1505	OUTPUT:
		1506	RETVAL
		1507
		1508	int
		1509	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1510	CODE:
		1511	{
		1512	STRLEN svlen;
		1513	void *addr = SvPVbyte (scalar, svlen);
		1514	size_t len = SvUV (length);
		1515
		1516	if (offset < 0)
		1517	offset += svlen;
		1518
		1519	if (offset < 0 || offset > svlen)
		1520	croak ("offset outside of scalar");
		1521
		1522	if (!SvOK (length) || len + offset > svlen)
		1523	len = svlen - offset;
		1524
		1525	addr = (void *)(((intptr_t)addr) + offset);
		1526	eio_page_align (&addr, &len);
		1527	#if _POSIX_MEMLOCK
		1528	RETVAL = munlock (addr, len);
		1529	#else
		1530	RETVAL = ((errno = ENOSYS), -1);
		1531	#endif
		1532	}
		1533	OUTPUT:
		1534	RETVAL
		1535
		1536	int
		1537	munlockall ()
		1538	CODE:
		1539	#if _POSIX_MEMLOCK
		1540	munlockall ();
		1541	#else
		1542	RETVAL = -1;
		1543	errno = ENOSYS;
		1544	#endif
		1545	OUTPUT:
		1546	RETVAL
		1547
		1548	void _on_next_submit (SV *cb)
		1549	CODE:
		1550	SvREFCNT_dec (on_next_submit);
		1551	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1552
		1553	PROTOTYPES: DISABLE
		1554
		1555	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1556
		1557	void
		1558	cancel (aio_req_ornot req)
		1559	CODE:
		1560	eio_cancel (req);
		1561
		1562	void
		1563	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1564	PPCODE:
		1565	{
		1566	if (GIMME_V != G_VOID)
		1567	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1568
		1569	if (items > 1)
		1570	{
		1571	SV *cb_cv =get_cb (callback);
		1572
		1573	SvREFCNT_dec (req->callback);
		1574	req->callback = SvREFCNT_inc (cb_cv);
		1575	}
		1576	}
		1577
		1578	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1579
		1580	void
		1581	add (aio_req grp, ...)
		1582	PPCODE:
		1583	{
		1584	int i;
		1585
		1586	if (grp->int1 == 2)
		1587	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1588
		1589	for (i = 1; i < items; ++i )
		1590	{
		1591	aio_req req;
		1592
		1593	if (GIMME_V != G_VOID)
		1594	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1595
		1596	req = SvAIO_REQ (ST (i));
		1597
		1598	if (req)
		1599	eio_grp_add (grp, req);
		1600	}
		1601	}
		1602
		1603	void
		1604	cancel_subs (aio_req_ornot req)
		1605	CODE:
		1606	req_cancel_subs (req);
		1607
		1608	void
		1609	result (aio_req grp, ...)
		1610	CODE:
		1611	{
		1612	int i;
		1613	AV *av;
		1614
		1615	grp->errorno = errno;
		1616
		1617	av = newAV ();
		1618	av_extend (av, items - 1);
		1619
		1620	for (i = 1; i < items; ++i )
		1621	av_push (av, newSVsv (ST (i)));
		1622
		1623	SvREFCNT_dec (grp->sv1);
		1624	grp->sv1 = (SV *)av;
		1625	}
		1626
		1627	void
		1628	errno (aio_req grp, int errorno = errno)
		1629	CODE:
		1630	grp->errorno = errorno;
		1631
		1632	void
		1633	limit (aio_req grp, int limit)
		1634	CODE:
		1635	eio_grp_limit (grp, limit);
		1636
		1637	void
		1638	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1639	CODE:
		1640	{
		1641	SvREFCNT_dec (grp->sv2);
		1642	grp->sv2 = newSVsv (callback);
		1643	grp->feed = aio_grp_feed;
		1644
		1645	if (grp->int2 <= 0)
		1646	grp->int2 = 2;
		1647
		1648	eio_grp_limit (grp, grp->int2);
		1649	}
		1650

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