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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.11 by root, Wed Jul 20 21:55:27 2005 UTC vs.
Revision 1.170 by root, Wed Aug 4 16:09:36 2010 UTC

1	#define _XOPEN_SOURCE 500	1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9		16	#include <sys/statvfs.h>
10	#include <unistd.h>	17	#include <limits.h>
11	#include <fcntl.h>	18	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	19	#include <sched.h>
14	#if __linux	20
		21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
15	#include <sys/syscall.h>	22	# include <sys/mman.h>
16	#endif	23	#endif
17		24
18	#include <pthread.h>	25	/* perl namespace pollution */
		26	#undef VERSION
19		27
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	28	#ifdef _WIN32
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		29
24	#if __ia64	30	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	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
26	#else	66	#else
27	# define STACKSIZE 4096	67
		68	# include <sys/time.h>
		69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if _XOPEN_SOURCE < 600 || NO_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef ST_NODEV
		171	# define ST_NODEV 0
		172	#endif
		173	#ifndef ST_NOEXEC
		174	# define ST_NOEXEC 0
		175	#endif
		176	#ifndef ST_SYNCHRONOUS
		177	# define ST_SYNCHRONOUS 0
		178	#endif
		179	#ifndef ST_MANDLOCK
		180	# define ST_MANDLOCK 0
		181	#endif
		182	#ifndef ST_WRITE
		183	# define ST_WRITE 0
		184	#endif
		185	#ifndef ST_APPEND
		186	# define ST_APPEND 0
		187	#endif
		188	#ifndef ST_IMMUTABLE
		189	# define ST_IMMUTABLE 0
		190	#endif
		191	#ifndef ST_NOATIME
		192	# define ST_NOATIME 0
		193	#endif
		194	#ifndef ST_NODIRATIME
		195	# define ST_NODIRATIME 0
		196	#endif
		197	#ifndef ST_RELATIME
		198	# define ST_RELATIME 0
		199	#endif
		200
		201	#ifndef MCL_CURRENT
		202	# define MCL_CURRENT 0
		203	#endif
		204	#ifndef MCL_FUTURE
		205	# define MCL_FUTURE 0
		206	#endif
		207
		208	#ifndef MAP_ANONYMOUS
		209	# ifdef MAP_ANON
		210	# define MAP_ANONYMOUS MAP_ANON
		211	# else
		212	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	213	# endif
		214	#endif
		215	#ifndef MAP_HUGETLB
		216	# define MAP_HUGETLB 0
		217	#endif
		218	#ifndef MAP_LOCKED
		219	# define MAP_LOCKED 0
		220	#endif
		221	#ifndef MAP_NORESERVE
		222	# define MAP_NORESERVE 0
		223	#endif
		224	#ifndef MAP_POPULATE
		225	# define MAP_POPULATE 0
		226	#endif
		227	#ifndef MAP_NONBLOCK
		228	# define MAP_NONBLOCK 0
		229	#endif
		230
		231	#ifndef PAGESIZE
		232	# define PAGESIZE sysconf (_SC_PAGESIZE)
		233	#endif
		234
		235	static int req_invoke (eio_req *req);
		236	#define EIO_FINISH(req) req_invoke (req)
		237	static void req_destroy (eio_req *grp);
		238	#define EIO_DESTROY(req) req_destroy (req)
29		239
30	enum {	240	enum {
31	REQ_QUIT,	241	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35	REQ_FSYNC, REQ_FDATASYNC,
36	};	242	};
37		243
38	typedef struct aio_cb {	244	#include "libeio/eio.c"
39	struct aio_cb *volatile next;
40		245
41	int type;
42
43	int fd;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;
55
56	typedef aio_cb *aio_req;	246	typedef eio_req *aio_req;
		247	typedef eio_req *aio_req_ornot;
57		248
58	static int started;	249	static SV *on_next_submit;
59	static volatile int nreqs;	250	static int next_pri = EIO_PRI_DEFAULT;
60	static int max_outstanding = 1<<30;	251	static int max_outstanding;
61	static int respipe [2];
62		252
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	253	static s_epipe respipe;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		254
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	255	static void req_destroy (aio_req req);
68	static volatile aio_req ress, rese; /* queue start, queue end */	256	static void req_cancel (aio_req req);
69		257
70	static void	258	static void want_poll (void)
71	poll_wait ()
72	{	259	{
73	if (nreqs && !ress)	260	/* write a dummy byte to the pipe so fh becomes ready */
		261	s_epipe_signal (&respipe);
		262	}
		263
		264	static void done_poll (void)
		265	{
		266	/* read any signals sent by the worker threads */
		267	s_epipe_drain (&respipe);
		268	}
		269
		270	/* must be called at most once */
		271	static SV *req_sv (aio_req req, HV *stash)
		272	{
		273	if (!req->self)
74	{	274	{
75	fd_set rfd;	275	req->self = (SV *)newHV ();
76	FD_ZERO(&rfd);	276	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
77	FD_SET(respipe [0], &rfd);
78
79	select (respipe [0] + 1, &rfd, 0, 0, 0);
80	}	277	}
81	}
82		278
83	static int	279	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
84	poll_cb ()	280	}
85	{
86	dSP;
87	int count = 0;
88	aio_req req, prv;
89		281
90	static int rl;//D	282	static aio_req SvAIO_REQ (SV *sv)
91	//printf ("%d ENTER\n", ++rl);//D	283	{
		284	MAGIC *mg;
92		285
93	pthread_mutex_lock (&reslock);	286	if (!SvROK (sv)
		287	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		288	&& SvSTASH (SvRV (sv)) != aio_req_stash
		289	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		290	croak ("object of class IO::AIO::REQ expected");
94		291
95	{	292	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
96	/* read any signals sent by the worker threads */
97	char buf [32];
98	while (read (respipe [0], buf, 32) > 0)
99	;
100	}
101		293
102	req = ress;	294	return mg ? (aio_req)mg->mg_ptr : 0;
103	ress = rese = 0;	295	}
104		296
105	pthread_mutex_unlock (&reslock);	297	static void aio_grp_feed (aio_req grp)
106		298	{
107	while (req)	299	if (grp->sv2 && SvOK (grp->sv2))
108	{	300	{
109	nreqs--;	301	dSP;
110	//printf ("%d count %d %p->%p\n", rl, count, req, req->next);//D
111		302
112	if (req->type == REQ_QUIT)	303	ENTER;
113	started--;	304	SAVETMPS;
114	else	305	PUSHMARK (SP);
		306	XPUSHs (req_sv (grp, aio_grp_stash));
		307	PUTBACK;
		308	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		309	SPAGAIN;
		310	FREETMPS;
		311	LEAVE;
		312	}
		313	}
		314
		315	static void req_submit (eio_req *req)
		316	{
		317	eio_submit (req);
		318
		319	if (expect_false (on_next_submit))
		320	{
		321	dSP;
		322	SV *cb = sv_2mortal (on_next_submit);
		323
		324	on_next_submit = 0;
		325
		326	PUSHMARK (SP);
		327	PUTBACK;
		328	call_sv (cb, G_DISCARD | G_EVAL);
		329	}
		330	}
		331
		332	static int req_invoke (eio_req *req)
		333	{
		334	if (req->flags & FLAG_SV2_RO_OFF)
		335	SvREADONLY_off (req->sv2);
		336
		337	if (!EIO_CANCELLED (req) && req->callback)
		338	{
		339	dSP;
		340	static SV *sv_result_cache; /* caches the result integer SV */
		341	SV *sv_result;
		342
		343	ENTER;
		344	SAVETMPS;
		345	PUSHMARK (SP);
		346	EXTEND (SP, 1);
		347
		348	/* do not recreate the result IV from scratch each time */
		349	if (expect_true (sv_result_cache))
115	{	350	{
116	int errorno = errno;	351	sv_result = sv_result_cache; sv_result_cache = 0;
117	errno = req->errorno;	352	SvIV_set (sv_result, req->result);
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	if (SvOK (req->callback))
154	{
155	PUTBACK;
156	call_sv (req->callback, G_VOID | G_EVAL);
157	SPAGAIN;
158	}
159
160	if (req->callback)
161	SvREFCNT_dec (req->callback);
162
163	errno = errorno;
164	count++;
165	}
166
167	prv = req;
168	req = req->next;
169	Safefree (prv);
170
171	/* TODO: croak on errors? */
172	}
173
174	//printf ("%d LEAVE %p %p\n", rl--, ress, rese);//D
175	return count;
176	}
177
178	static void *aio_proc(void *arg);
179
180	static void
181	start_thread (void)
182	{
183	sigset_t fullsigset, oldsigset;
184	pthread_t tid;
185	pthread_attr_t attr;
186
187	pthread_attr_init (&attr);
188	pthread_attr_setstacksize (&attr, STACKSIZE);
189	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
190
191	sigfillset (&fullsigset);
192	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
193
194	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
195	started++;
196
197	sigprocmask (SIG_SETMASK, &oldsigset, 0);
198	}
199
200	static void
201	send_req (aio_req req)
202	{
203	nreqs++;
204
205	pthread_mutex_lock (&reqlock);
206
207	req->next = 0;
208
209	if (reqe)
210	{
211	reqe->next = req;
212	reqe = req;
213	}
214	else
215	reqe = reqs = req;
216
217	pthread_cond_signal (&reqwait);
218	pthread_mutex_unlock (&reqlock);
219
220	while (nreqs > max_outstanding)
221	{
222	poll_wait ();
223	poll_cb ();
224	}
225	}
226
227	static void
228	end_thread (void)
229	{
230	aio_req req;
231	New (0, req, 1, aio_cb);
232	req->type = REQ_QUIT;
233
234	send_req (req);
235	}
236
237	static void
238	read_write (int dowrite, int fd, off_t offset, size_t length,
239	SV *data, STRLEN dataoffset, SV *callback)
240	{
241	aio_req req;
242	STRLEN svlen;
243	char *svptr = SvPV (data, svlen);
244
245	SvUPGRADE (data, SVt_PV);
246	SvPOK_on (data);
247
248	if (dataoffset < 0)
249	dataoffset += svlen;
250
251	if (dataoffset < 0 || dataoffset > svlen)
252	croak ("data offset outside of string");
253
254	if (dowrite)
255	{
256	/* write: check length and adjust. */
257	if (length < 0 || length + dataoffset > svlen)
258	length = svlen - dataoffset;
259	}
260	else
261	{
262	/* read: grow scalar as necessary */
263	svptr = SvGROW (data, length + dataoffset);
264	}
265
266	if (length < 0)
267	croak ("length must not be negative");
268
269	Newz (0, req, 1, aio_cb);
270
271	if (!req)
272	croak ("out of memory during aio_req allocation");
273
274	req->type = dowrite ? REQ_WRITE : REQ_READ;
275	req->fd = fd;
276	req->offset = offset;
277	req->length = length;
278	req->data = SvREFCNT_inc (data);
279	req->dataptr = (char *)svptr + dataoffset;
280	req->callback = SvREFCNT_inc (callback);
281
282	send_req (req);
283	}
284
285	static void *
286	aio_proc (void *thr_arg)
287	{
288	aio_req req;
289	int type;
290
291	do
292	{
293	pthread_mutex_lock (&reqlock);
294
295	for (;;)
296	{
297	req = reqs;
298
299	if (reqs)
300	{
301	reqs = reqs->next;
302	if (!reqs) reqe = 0;
303	}
304
305	if (req)
306	break;
307
308	pthread_cond_wait (&reqwait, &reqlock);
309	}
310
311	pthread_mutex_unlock (&reqlock);
312
313	errno = 0; /* strictly unnecessary */
314
315	type = req->type;
316
317	switch (type)
318	{
319	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
320	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
321	#if SYS_readahead
322	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
323	#else
324	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
325	#endif
326
327	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
328	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
329	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
330
331	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
332	case REQ_CLOSE: req->result = close (req->fd); break;
333	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
334
335	case REQ_FSYNC: req->result = fsync (req->fd); break;
336	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
337
338	case REQ_QUIT:
339	break;
340
341	default:
342	req->result = ENOSYS;
343	break;
344	}
345
346	req->errorno = errno;
347
348	pthread_mutex_lock (&reslock);
349
350	req->next = 0;
351
352	if (rese)
353	{
354	rese->next = req;
355	rese = req;
356	}	353	}
357	else	354	else
358	{	355	{
359	rese = ress = req;	356	sv_result = newSViv (req->result);
360		357	SvREADONLY_on (sv_result);
361	/* write a dummy byte to the pipe so fh becomes ready */
362	write (respipe [1], &respipe, 1);
363	}	358	}
364		359
365	pthread_mutex_unlock (&reslock);	360	switch (req->type)
		361	{
		362	case EIO_READDIR:
		363	{
		364	SV *rv = &PL_sv_undef;
		365
		366	if (req->result >= 0)
		367	{
		368	int i;
		369	char *names = (char *)req->ptr2;
		370	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		371	AV *av = newAV ();
		372
		373	av_extend (av, req->result - 1);
		374
		375	for (i = 0; i < req->result; ++i)
		376	{
		377	if (req->int1 & EIO_READDIR_DENTS)
		378	{
		379	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		380
		381	if (req->int1 & EIO_READDIR_CUSTOM2)
		382	{
		383	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		384	AV *avent = newAV ();
		385
		386	av_extend (avent, 2);
		387
		388	if (!sv_type [ent->type])
		389	{
		390	sv_type [ent->type] = newSViv (ent->type);
		391	SvREADONLY_on (sv_type [ent->type]);
		392	}
		393
		394	av_store (avent, 0, namesv);
		395	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		396	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		397
		398	av_store (av, i, newRV_noinc ((SV *)avent));
		399	}
		400	else
		401	av_store (av, i, namesv);
		402
		403	++ent;
		404	}
		405	else
		406	{
		407	SV *name = newSVpv (names, 0);
		408	av_store (av, i, name);
		409	names += SvCUR (name) + 1;
		410	}
		411	}
		412
		413	rv = sv_2mortal (newRV_noinc ((SV *)av));
		414	}
		415
		416	PUSHs (rv);
		417
		418	if (req->int1 & EIO_READDIR_CUSTOM1)
		419	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		420	}
		421	break;
		422
		423	case EIO_OPEN:
		424	{
		425	/* convert fd to fh */
		426	SV *fh = &PL_sv_undef;
		427
		428	if (req->result >= 0)
		429	{
		430	GV *gv = (GV *)sv_newmortal ();
		431	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		432	char sym [64];
		433	int symlen;
		434
		435	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		436	gv_init (gv, aio_stash, sym, symlen, 0);
		437
		438	symlen = snprintf (
		439	sym,
		440	sizeof (sym),
		441	"%s&=%d",
		442	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		443	(int)req->result
		444	);
		445
		446	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		447	fh = (SV *)gv;
		448	}
		449
		450	PUSHs (fh);
		451	}
		452	break;
		453
		454	case EIO_STATVFS:
		455	case EIO_FSTATVFS:
		456	{
		457	SV *rv = &PL_sv_undef;
		458
		459	if (req->result >= 0)
		460	{
		461	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		462	HV *hv = newHV ();
		463
		464	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		465
		466	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		467	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		468	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		469	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		470	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		471	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		472	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		473	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		474	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		475	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		476	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		477	}
		478
		479	PUSHs (rv);
		480	}
		481
		482	break;
		483
		484	case EIO_GROUP:
		485	req->int1 = 2; /* mark group as finished */
		486
		487	if (req->sv1)
		488	{
		489	int i;
		490	AV *av = (AV *)req->sv1;
		491
		492	EXTEND (SP, AvFILL (av) + 1);
		493	for (i = 0; i <= AvFILL (av); ++i)
		494	PUSHs (*av_fetch (av, i, 0));
		495	}
		496	break;
		497
		498	case EIO_NOP:
		499	case EIO_BUSY:
		500	break;
		501
		502	case EIO_READLINK:
		503	if (req->result > 0)
		504	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		505	break;
		506
		507	case EIO_STAT:
		508	case EIO_LSTAT:
		509	case EIO_FSTAT:
		510	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		511	PL_laststatval = req->result;
		512	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		513	PUSHs (sv_result);
		514	break;
		515
		516	case EIO_READ:
		517	{
		518	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		519	*SvEND (req->sv2) = 0;
		520	SvPOK_only (req->sv2);
		521	SvSETMAGIC (req->sv2);
		522	PUSHs (sv_result);
		523	}
		524	break;
		525
		526	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		527	if (req->result > 0)
		528	SvIV_set (sv_result, 0);
		529	/* FALLTHROUGH */
		530
		531	default:
		532	PUSHs (sv_result);
		533	break;
		534	}
		535
		536	errno = req->errorno;
		537
		538	PUTBACK;
		539	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		540	SPAGAIN;
		541
		542	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		543	SvREFCNT_dec (sv_result);
		544	else
		545	sv_result_cache = sv_result;
		546
		547	FREETMPS;
		548	LEAVE;
		549
		550	PUTBACK;
366	}	551	}
367	while (type != REQ_QUIT);	552
		553	return !!SvTRUE (ERRSV);
		554	}
		555
		556	static void req_destroy (aio_req req)
		557	{
		558	if (req->self)
		559	{
		560	sv_unmagic (req->self, PERL_MAGIC_ext);
		561	SvREFCNT_dec (req->self);
		562	}
		563
		564	SvREFCNT_dec (req->sv1);
		565	SvREFCNT_dec (req->sv2);
		566	SvREFCNT_dec (req->callback);
		567
		568	Safefree (req);
		569	}
		570
		571	static void req_cancel_subs (aio_req grp)
		572	{
		573	aio_req sub;
		574
		575	if (grp->type != EIO_GROUP)
		576	return;
		577
		578	SvREFCNT_dec (grp->sv2);
		579	grp->sv2 = 0;
		580
		581	eio_grp_cancel (grp);
		582	}
		583
		584	static void
		585	create_respipe (void)
		586	{
		587	if (s_epipe_renew (&respipe))
		588	croak ("IO::AIO: unable to initialize result pipe");
		589	}
		590
		591	static void poll_wait (void)
		592	{
		593	while (eio_nreqs ())
		594	{
		595	int size;
		596
		597	X_LOCK (reslock);
		598	size = res_queue.size;
		599	X_UNLOCK (reslock);
		600
		601	if (size)
		602	return;
		603
		604	etp_maybe_start_thread ();
		605
		606	s_epipe_wait (&respipe);
		607	}
		608	}
		609
		610	static int poll_cb (void)
		611	{
		612	for (;;)
		613	{
		614	int res = eio_poll ();
		615
		616	if (res > 0)
		617	croak (0);
		618
		619	if (!max_outstanding || max_outstanding > eio_nreqs ())
		620	return res;
		621
		622	poll_wait ();
		623	}
		624	}
		625
		626	static void atfork_child (void)
		627	{
		628	create_respipe ();
		629	}
		630
		631	/*****************************************************************************/
		632
		633	#if !_POSIX_MAPPED_FILES
		634	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		635	# define munmap(addr,length) (errno = ENOSYS, -1)
		636	#endif
		637
		638	#define MMAP_MAGIC PERL_MAGIC_ext
		639
		640	static int
		641	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		642	{
		643	int old_errno = errno;
		644	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		645	errno = old_errno;
		646
		647	mg->mg_obj = 0; /* just in case */
		648
		649	SvREADONLY_off (sv);
		650
		651	if (SvPVX (sv) != mg->mg_ptr)
		652	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		653
		654	SvCUR_set (sv, 0);
		655	SvPVX (sv) = 0;
		656	SvOK_off (sv);
368		657
369	return 0;	658	return 0;
370	}	659	}
371		660
		661	static MGVTBL mmap_vtbl = {
		662	0, 0, 0, 0, mmap_free
		663	};
		664
		665	/*****************************************************************************/
		666
		667	static SV *
		668	get_cb (SV *cb_sv)
		669	{
		670	SvGETMAGIC (cb_sv);
		671	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		672	}
		673
		674	#define dREQ \
		675	SV *cb_cv; \
		676	aio_req req; \
		677	int req_pri = next_pri; \
		678	next_pri = EIO_PRI_DEFAULT; \
		679	\
		680	cb_cv = get_cb (callback); \
		681	\
		682	Newz (0, req, 1, eio_req); \
		683	if (!req) \
		684	croak ("out of memory during eio_req allocation"); \
		685	\
		686	req->callback = SvREFCNT_inc (cb_cv); \
		687	req->pri = req_pri
		688
		689	#define REQ_SEND \
		690	PUTBACK; \
		691	req_submit (req); \
		692	SPAGAIN; \
		693	\
		694	if (GIMME_V != G_VOID) \
		695	XPUSHs (req_sv (req, aio_req_stash));
		696
372	MODULE = IO::AIO PACKAGE = IO::AIO	697	MODULE = IO::AIO PACKAGE = IO::AIO
373		698
374	PROTOTYPES: ENABLE	699	PROTOTYPES: ENABLE
375		700
376	BOOT:	701	BOOT:
377	{	702	{
378	if (pipe (respipe))	703	static const struct {
379	croak ("unable to initialize result pipe");	704	const char *name;
		705	IV iv;
		706	} *civ, const_iv[] = {
		707	# define const_niv(name, value) { # name, (IV) value },
		708	# define const_iv(name) { # name, (IV) name },
		709	# define const_eio(name) { # name, (IV) EIO_ ## name },
		710	const_iv (EXDEV)
		711	const_iv (ENOSYS)
		712	const_iv (O_RDONLY)
		713	const_iv (O_WRONLY)
		714	const_iv (O_RDWR)
		715	const_iv (O_CREAT)
		716	const_iv (O_TRUNC)
		717	const_iv (O_EXCL)
		718	const_iv (O_APPEND)
		719	#ifndef _WIN32
		720	const_iv (S_IFIFO)
		721	#endif
		722	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		723	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		724	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		725	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		726	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		727	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
380		728
381	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	729	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
382	croak ("cannot set result pipe to nonblocking mode");	730	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		731	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		732	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		733	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
383		734
384	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	735	const_iv (ST_RDONLY)
385	croak ("cannot set result pipe to nonblocking mode");	736	const_iv (ST_NOSUID)
386	}	737	const_iv (ST_NODEV)
		738	const_iv (ST_NOEXEC)
		739	const_iv (ST_SYNCHRONOUS)
		740	const_iv (ST_MANDLOCK)
		741	const_iv (ST_WRITE)
		742	const_iv (ST_APPEND)
		743	const_iv (ST_IMMUTABLE)
		744	const_iv (ST_NOATIME)
		745	const_iv (ST_NODIRATIME)
		746	const_iv (ST_RELATIME)
387		747
		748	const_iv (PROT_EXEC)
		749	const_iv (PROT_NONE)
		750	const_iv (PROT_READ)
		751	const_iv (PROT_WRITE)
		752
		753	/*const_iv (MAP_FIXED)*/
		754	const_iv (MAP_PRIVATE)
		755	const_iv (MAP_SHARED)
		756	const_iv (MAP_ANONYMOUS)
		757
		758	/* linuxish */
		759	const_iv (MAP_HUGETLB)
		760	const_iv (MAP_LOCKED)
		761	const_iv (MAP_NORESERVE)
		762	const_iv (MAP_POPULATE)
		763	const_iv (MAP_NONBLOCK)
		764
		765	const_iv (MCL_FUTURE)
		766	const_iv (MCL_CURRENT)
		767
		768	const_eio (MS_ASYNC)
		769	const_eio (MS_INVALIDATE)
		770	const_eio (MS_SYNC)
		771
		772	const_eio (MT_MODIFY)
		773
		774	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		775	const_eio (SYNC_FILE_RANGE_WRITE)
		776	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		777
		778	const_eio (READDIR_DENTS)
		779	const_eio (READDIR_DIRS_FIRST)
		780	const_eio (READDIR_STAT_ORDER)
		781	const_eio (READDIR_FOUND_UNKNOWN)
		782
		783	const_eio (DT_UNKNOWN)
		784	const_eio (DT_FIFO)
		785	const_eio (DT_CHR)
		786	const_eio (DT_DIR)
		787	const_eio (DT_BLK)
		788	const_eio (DT_REG)
		789	const_eio (DT_LNK)
		790	const_eio (DT_SOCK)
		791	const_eio (DT_WHT)
		792	};
		793
		794	aio_stash = gv_stashpv ("IO::AIO" , 1);
		795	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		796	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		797
		798	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		799	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		800
		801	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		802
		803	create_respipe ();
		804
		805	if (eio_init (want_poll, done_poll) < 0)
		806	croak ("IO::AIO: unable to initialise eio library");
		807
		808	/* atfork child called in fifo order, so before eio's handler */
		809	X_THREAD_ATFORK (0, 0, atfork_child);
		810	}
		811
388	void	812	void
389	min_parallel(nthreads)	813	max_poll_reqs (int nreqs)
390	int nthreads
391	PROTOTYPE: $	814	PROTOTYPE: $
392	CODE:	815	CODE:
393	while (nthreads > started)	816	eio_set_max_poll_reqs (nreqs);
394	start_thread ();
395		817
396	void	818	void
397	max_parallel(nthreads)	819	max_poll_time (double nseconds)
398	int nthreads
399	PROTOTYPE: $	820	PROTOTYPE: $
400	CODE:	821	CODE:
		822	eio_set_max_poll_time (nseconds);
		823
		824	void
		825	min_parallel (int nthreads)
		826	PROTOTYPE: $
		827	CODE:
		828	eio_set_min_parallel (nthreads);
		829
		830	void
		831	max_parallel (int nthreads)
		832	PROTOTYPE: $
		833	CODE:
		834	eio_set_max_parallel (nthreads);
		835
		836	void
		837	max_idle (int nthreads)
		838	PROTOTYPE: $
		839	CODE:
		840	eio_set_max_idle (nthreads);
		841
		842	void
		843	max_outstanding (int maxreqs)
		844	PROTOTYPE: $
		845	CODE:
		846	max_outstanding = maxreqs;
		847
		848	void
		849	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		850	PROTOTYPE: $$$;$
		851	PPCODE:
401	{	852	{
402	int cur = started;	853	dREQ;
403	while (cur > nthreads)	854
404	{	855	req->type = EIO_OPEN;
405	end_thread ();	856	req->sv1 = newSVsv (pathname);
406	cur--;	857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858	req->int1 = flags;
		859	req->int2 = mode;
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		866	PROTOTYPE: $;$
		867	ALIAS:
		868	aio_fsync = EIO_FSYNC
		869	aio_fdatasync = EIO_FDATASYNC
		870	PPCODE:
		871	{
		872	int fd = s_fileno_croak (fh, 0);
		873	dREQ;
		874
		875	req->type = ix;
		876	req->sv1 = newSVsv (fh);
		877	req->int1 = fd;
		878
		879	REQ_SEND (req);
		880	}
		881
		882	void
		883	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		884	PROTOTYPE: $$$$;$
		885	PPCODE:
		886	{
		887	int fd = s_fileno_croak (fh, 0);
		888	dREQ;
		889
		890	req->type = EIO_SYNC_FILE_RANGE;
		891	req->sv1 = newSVsv (fh);
		892	req->int1 = fd;
		893	req->offs = offset;
		894	req->size = nbytes;
		895	req->int2 = flags;
		896
		897	REQ_SEND (req);
		898	}
		899
		900	void
		901	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		902	PROTOTYPE: $;$
		903	PPCODE:
		904	{
		905	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		906	int fd = s_fileno_croak (fh, 0);
		907	dREQ;
		908
		909	if (close_pipe < 0)
		910	{
		911	int pipefd [2];
		912
		913	if (pipe (pipefd) < 0
		914	|| close (pipefd [1]) < 0
		915	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		916	abort (); /*D*/
		917
		918	close_pipe = pipefd [0];
407	}	919	}
408		920
409	while (started > nthreads)	921	req->type = EIO_DUP2;
		922	req->int1 = close_pipe;
		923	req->sv2 = newSVsv (fh);
		924	req->int2 = fd;
		925
		926	REQ_SEND (req);
		927	}
		928
		929	void
		930	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		931	ALIAS:
		932	aio_read = EIO_READ
		933	aio_write = EIO_WRITE
		934	PROTOTYPE: $$$$$;$
		935	PPCODE:
		936	{
		937	STRLEN svlen;
		938	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		939	char *svptr = SvPVbyte (data, svlen);
		940	UV len = SvUV (length);
		941
		942	if (dataoffset < 0)
		943	dataoffset += svlen;
		944
		945	if (dataoffset < 0 || dataoffset > svlen)
		946	croak ("dataoffset outside of data scalar");
		947
		948	if (ix == EIO_WRITE)
		949	{
		950	/* write: check length and adjust. */
		951	if (!SvOK (length) || len + dataoffset > svlen)
		952	len = svlen - dataoffset;
		953	}
		954	else
		955	{
		956	/* read: check type and grow scalar as necessary */
		957	SvUPGRADE (data, SVt_PV);
		958	svptr = SvGROW (data, len + dataoffset + 1);
		959	}
		960
		961	{
		962	dREQ;
		963
		964	req->type = ix;
		965	req->sv1 = newSVsv (fh);
		966	req->int1 = fd;
		967	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		968	req->size = len;
		969	req->sv2 = SvREFCNT_inc (data);
		970	req->ptr2 = (char *)svptr + dataoffset;
		971	req->stroffset = dataoffset;
		972
		973	if (!SvREADONLY (data))
		974	{
		975	SvREADONLY_on (data);
		976	req->flags |= FLAG_SV2_RO_OFF;
		977	}
		978
		979	REQ_SEND;
		980	}
		981	}
		982
		983	void
		984	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		985	PROTOTYPE: $$;$
		986	PPCODE:
		987	{
		988	SV *data;
		989	dREQ;
		990
		991	req->type = EIO_READLINK;
		992	req->sv1 = newSVsv (path);
		993	req->ptr1 = SvPVbyte_nolen (req->sv1);
		994
		995	REQ_SEND;
		996	}
		997
		998	void
		999	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1000	PROTOTYPE: $$$$;$
		1001	PPCODE:
		1002	{
		1003	int ifd = s_fileno_croak (in_fh , 0);
		1004	int ofd = s_fileno_croak (out_fh, 1);
		1005	dREQ;
		1006
		1007	req->type = EIO_SENDFILE;
		1008	req->sv1 = newSVsv (out_fh);
		1009	req->int1 = ofd;
		1010	req->sv2 = newSVsv (in_fh);
		1011	req->int2 = ifd;
		1012	req->offs = in_offset;
		1013	req->size = length;
		1014
		1015	REQ_SEND;
		1016	}
		1017
		1018	void
		1019	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1020	PROTOTYPE: $$$;$
		1021	PPCODE:
		1022	{
		1023	int fd = s_fileno_croak (fh, 0);
		1024	dREQ;
		1025
		1026	req->type = EIO_READAHEAD;
		1027	req->sv1 = newSVsv (fh);
		1028	req->int1 = fd;
		1029	req->offs = offset;
		1030	req->size = length;
		1031
		1032	REQ_SEND;
		1033	}
		1034
		1035	void
		1036	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1037	ALIAS:
		1038	aio_stat = EIO_STAT
		1039	aio_lstat = EIO_LSTAT
		1040	aio_statvfs = EIO_STATVFS
		1041	PPCODE:
		1042	{
		1043	dREQ;
		1044
		1045	req->sv1 = newSVsv (fh_or_path);
		1046
		1047	if (SvPOK (req->sv1))
		1048	{
		1049	req->type = ix;
		1050	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1051	}
		1052	else
		1053	{
		1054	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1055	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1056	}
		1057
		1058	REQ_SEND;
		1059	}
		1060
		1061	void
		1062	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1063	PPCODE:
		1064	{
		1065	dREQ;
		1066
		1067	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1068	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1069	req->sv1 = newSVsv (fh_or_path);
		1070
		1071	if (SvPOK (req->sv1))
		1072	{
		1073	req->type = EIO_UTIME;
		1074	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1075	}
		1076	else
		1077	{
		1078	req->type = EIO_FUTIME;
		1079	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1080	}
		1081
		1082	REQ_SEND;
		1083	}
		1084
		1085	void
		1086	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1087	PPCODE:
		1088	{
		1089	dREQ;
		1090
		1091	req->sv1 = newSVsv (fh_or_path);
		1092	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1093
		1094	if (SvPOK (req->sv1))
		1095	{
		1096	req->type = EIO_TRUNCATE;
		1097	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1098	}
		1099	else
		1100	{
		1101	req->type = EIO_FTRUNCATE;
		1102	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1103	}
		1104
		1105	REQ_SEND;
		1106	}
		1107
		1108	void
		1109	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1110	ALIAS:
		1111	aio_chmod = EIO_CHMOD
		1112	aio_mkdir = EIO_MKDIR
		1113	PPCODE:
		1114	{
		1115	dREQ;
		1116
		1117	req->int2 = mode;
		1118	req->sv1 = newSVsv (fh_or_path);
		1119
		1120	if (SvPOK (req->sv1))
		1121	{
		1122	req->type = ix;
		1123	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1124	}
		1125	else
		1126	{
		1127	req->type = EIO_FCHMOD;
		1128	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1129	}
		1130
		1131	REQ_SEND;
		1132	}
		1133
		1134	void
		1135	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1136	PPCODE:
		1137	{
		1138	dREQ;
		1139
		1140	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1141	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1142	req->sv1 = newSVsv (fh_or_path);
		1143
		1144	if (SvPOK (req->sv1))
		1145	{
		1146	req->type = EIO_CHOWN;
		1147	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1148	}
		1149	else
		1150	{
		1151	req->type = EIO_FCHOWN;
		1152	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1153	}
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	dREQ;
		1163
		1164	req->type = EIO_READDIR;
		1165	req->sv1 = newSVsv (pathname);
		1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1167	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1168
		1169	if (flags & EIO_READDIR_DENTS)
		1170	req->int1 |= EIO_READDIR_CUSTOM2;
		1171
		1172	REQ_SEND;
		1173	}
		1174
		1175	void
		1176	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1177	ALIAS:
		1178	aio_unlink = EIO_UNLINK
		1179	aio_rmdir = EIO_RMDIR
		1180	aio_readdir = EIO_READDIR
		1181	PPCODE:
		1182	{
		1183	dREQ;
		1184
		1185	req->type = ix;
		1186	req->sv1 = newSVsv (pathname);
		1187	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
		1193	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1194	ALIAS:
		1195	aio_link = EIO_LINK
		1196	aio_symlink = EIO_SYMLINK
		1197	aio_rename = EIO_RENAME
		1198	PPCODE:
		1199	{
		1200	dREQ;
		1201
		1202	req->type = ix;
		1203	req->sv1 = newSVsv (oldpath);
		1204	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1205	req->sv2 = newSVsv (newpath);
		1206	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1207
		1208	REQ_SEND;
		1209	}
		1210
		1211	void
		1212	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1213	PPCODE:
		1214	{
		1215	dREQ;
		1216
		1217	req->type = EIO_MKNOD;
		1218	req->sv1 = newSVsv (pathname);
		1219	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1220	req->int2 = (mode_t)mode;
		1221	req->offs = dev;
		1222
		1223	REQ_SEND;
		1224	}
		1225
		1226	void
		1227	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1228	ALIAS:
		1229	aio_mtouch = EIO_MTOUCH
		1230	aio_msync = EIO_MSYNC
		1231	PROTOTYPE: $$$$;$
		1232	PPCODE:
		1233	{
		1234	STRLEN svlen;
		1235	UV len = SvUV (length);
		1236	char *svptr = SvPVbyte (data, svlen);
		1237
		1238	if (offset < 0)
		1239	offset += svlen;
		1240
		1241	if (offset < 0 || offset > svlen)
		1242	croak ("offset outside of scalar");
		1243
		1244	if (!SvOK (length) || len + offset > svlen)
		1245	len = svlen - offset;
		1246
		1247	{
		1248	dREQ;
		1249
		1250	req->type = ix;
		1251	req->size = len;
		1252	req->sv2 = SvREFCNT_inc (data);
		1253	req->ptr2 = (char *)svptr + offset;
		1254	req->int1 = flags;
		1255
		1256	REQ_SEND;
		1257	}
		1258	}
		1259
		1260	void
		1261	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1262	PPCODE:
		1263	{
		1264	dREQ;
		1265
		1266	req->type = EIO_BUSY;
		1267	req->nv1 = delay < 0. ? 0. : delay;
		1268
		1269	REQ_SEND;
		1270	}
		1271
		1272	void
		1273	aio_group (SV *callback=&PL_sv_undef)
		1274	PROTOTYPE: ;$
		1275	PPCODE:
		1276	{
		1277	dREQ;
		1278
		1279	req->type = EIO_GROUP;
		1280
		1281	req_submit (req);
		1282	XPUSHs (req_sv (req, aio_grp_stash));
		1283	}
		1284
		1285	void
		1286	aio_nop (SV *callback=&PL_sv_undef)
		1287	ALIAS:
		1288	aio_nop = EIO_NOP
		1289	aio_sync = EIO_SYNC
		1290	PPCODE:
		1291	{
		1292	dREQ;
		1293
		1294	req->type = ix;
		1295
		1296	REQ_SEND;
		1297	}
		1298
		1299	int
		1300	aioreq_pri (int pri = 0)
		1301	PROTOTYPE: ;$
		1302	CODE:
		1303	RETVAL = next_pri;
		1304	if (items > 0)
		1305	{
		1306	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1307	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1308	next_pri = pri;
		1309	}
		1310	OUTPUT:
		1311	RETVAL
		1312
		1313	void
		1314	aioreq_nice (int nice = 0)
		1315	CODE:
		1316	nice = next_pri - nice;
		1317	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1318	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1319	next_pri = nice;
		1320
		1321	void
		1322	flush ()
		1323	PROTOTYPE:
		1324	CODE:
		1325	while (eio_nreqs ())
410	{	1326	{
411	poll_wait ();	1327	poll_wait ();
412	poll_cb ();	1328	poll_cb ();
413	}	1329	}
414	}
415		1330
416	int	1331	int
417	max_outstanding(nreqs)
418	int nreqs
419	PROTOTYPE: $
420	CODE:
421	RETVAL = max_outstanding;
422	max_outstanding = nreqs;
423
424	void
425	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
426	SV * pathname
427	int flags
428	int mode
429	SV * callback
430	PROTOTYPE: $$$;$
431	CODE:
432	{
433	aio_req req;
434
435	Newz (0, req, 1, aio_cb);
436
437	if (!req)
438	croak ("out of memory during aio_req allocation");
439
440	req->type = REQ_OPEN;
441	req->data = newSVsv (pathname);
442	req->dataptr = SvPV_nolen (req->data);
443	req->fd = flags;
444	req->mode = mode;
445	req->callback = SvREFCNT_inc (callback);
446
447	send_req (req);
448	}
449
450	void
451	aio_close(fh,callback=&PL_sv_undef)
452	InputStream fh
453	SV * callback
454	PROTOTYPE: $;$
455	ALIAS:
456	aio_close = REQ_CLOSE
457	aio_fsync = REQ_FSYNC
458	aio_fdatasync = REQ_FDATASYNC
459	CODE:
460	{
461	aio_req req;
462
463	Newz (0, req, 1, aio_cb);
464
465	if (!req)
466	croak ("out of memory during aio_req allocation");
467
468	req->type = ix;
469	req->fd = PerlIO_fileno (fh);
470	req->callback = SvREFCNT_inc (callback);
471
472	send_req (req);
473	}
474
475	void
476	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
477	InputStream fh
478	UV offset
479	IV length
480	SV * data
481	IV dataoffset
482	SV * callback
483	PROTOTYPE: $$$$$;$
484	CODE:
485	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
486
487	void
488	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
489	OutputStream fh
490	UV offset
491	IV length
492	SV * data
493	IV dataoffset
494	SV * callback
495	PROTOTYPE: $$$$$;$
496	CODE:
497	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
498
499	void
500	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
501	InputStream fh
502	UV offset
503	IV length
504	SV * callback
505	PROTOTYPE: $$$;$
506	CODE:
507	{
508	aio_req req;
509
510	if (length < 0)
511	croak ("length must not be negative");
512
513	Newz (0, req, 1, aio_cb);
514
515	if (!req)
516	croak ("out of memory during aio_req allocation");
517
518	req->type = REQ_READAHEAD;
519	req->fd = PerlIO_fileno (fh);
520	req->offset = offset;
521	req->length = length;
522	req->callback = SvREFCNT_inc (callback);
523
524	send_req (req);
525	}
526
527	void
528	aio_stat(fh_or_path,callback=&PL_sv_undef)
529	SV * fh_or_path
530	SV * callback
531	ALIAS:
532	aio_stat = REQ_STAT
533	aio_lstat = REQ_LSTAT
534	CODE:
535	{
536	aio_req req;
537
538	Newz (0, req, 1, aio_cb);
539
540	if (!req)
541	croak ("out of memory during aio_req allocation");
542
543	New (0, req->statdata, 1, Stat_t);
544
545	if (!req->statdata)
546	croak ("out of memory during aio_req->statdata allocation");
547
548	if (SvPOK (fh_or_path))
549	{
550	req->type = ix;
551	req->data = newSVsv (fh_or_path);
552	req->dataptr = SvPV_nolen (req->data);
553	}
554	else
555	{
556	req->type = REQ_FSTAT;
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
558	}
559
560	req->callback = SvREFCNT_inc (callback);
561
562	send_req (req);
563	}
564
565	void
566	aio_unlink(pathname,callback=&PL_sv_undef)
567	SV * pathname
568	SV * callback
569	CODE:
570	{
571	aio_req req;
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577
578	req->type = REQ_UNLINK;
579	req->data = newSVsv (pathname);
580	req->dataptr = SvPV_nolen (req->data);
581	req->callback = SvREFCNT_inc (callback);
582
583	send_req (req);
584	}
585
586	void
587	flush()
588	PROTOTYPE:
589	CODE:
590	while (nreqs)
591	{
592	poll_wait ();
593	poll_cb ();
594	}
595
596	void
597	poll()	1332	poll()
598	PROTOTYPE:	1333	PROTOTYPE:
599	CODE:	1334	CODE:
600	if (nreqs)
601	{
602	poll_wait ();	1335	poll_wait ();
603	poll_cb ();	1336	RETVAL = poll_cb ();
604	}	1337	OUTPUT:
		1338	RETVAL
605		1339
606	int	1340	int
607	poll_fileno()	1341	poll_fileno()
608	PROTOTYPE:	1342	PROTOTYPE:
609	CODE:	1343	CODE:
610	RETVAL = respipe [0];	1344	RETVAL = s_epipe_fd (&respipe);
611	OUTPUT:	1345	OUTPUT:
612	RETVAL	1346	RETVAL
613		1347
614	int	1348	int
615	poll_cb(...)	1349	poll_cb(...)
…		…
621		1355
622	void	1356	void
623	poll_wait()	1357	poll_wait()
624	PROTOTYPE:	1358	PROTOTYPE:
625	CODE:	1359	CODE:
626	if (nreqs)
627	poll_wait ();	1360	poll_wait ();
628		1361
629	int	1362	int
630	nreqs()	1363	nreqs()
631	PROTOTYPE:	1364	PROTOTYPE:
632	CODE:	1365	CODE:
633	RETVAL = nreqs;	1366	RETVAL = eio_nreqs ();
634	OUTPUT:	1367	OUTPUT:
635	RETVAL	1368	RETVAL
636		1369
		1370	int
		1371	nready()
		1372	PROTOTYPE:
		1373	CODE:
		1374	RETVAL = eio_nready ();
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	int
		1379	npending()
		1380	PROTOTYPE:
		1381	CODE:
		1382	RETVAL = eio_npending ();
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
		1387	nthreads()
		1388	PROTOTYPE:
		1389	CODE:
		1390	RETVAL = eio_nthreads ();
		1391	OUTPUT:
		1392	RETVAL
		1393
		1394	int
		1395	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1396	PROTOTYPE: $$$$
		1397	CODE:
		1398	RETVAL = posix_fadvise (fh, offset, length, advice);
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	ssize_t
		1403	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1404	PROTOTYPE: $$$$
		1405	CODE:
		1406	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1407	OUTPUT:
		1408	RETVAL
		1409
		1410	void
		1411	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1412	PROTOTYPE: $$$$$;$
		1413	PPCODE:
		1414	sv_unmagic (scalar, MMAP_MAGIC);
		1415	{
		1416	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1417	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1418	if (addr == (void *)-1)
		1419	XSRETURN_NO;
		1420
		1421	sv_force_normal (scalar);
		1422
		1423	/* we store the length in mg_obj, as namlen is I32 :/ */
		1424	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1425	->mg_obj = (SV *)length;
		1426
		1427	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1428
		1429	if (!(prot & PROT_WRITE))
		1430	SvREADONLY_on (scalar);
		1431
		1432	if (SvLEN (scalar))
		1433	Safefree (SvPVX (scalar));
		1434
		1435	SvPVX (scalar) = (char *)addr;
		1436	SvCUR_set (scalar, length);
		1437	SvLEN_set (scalar, 0);
		1438	SvPOK_only (scalar);
		1439
		1440	XSRETURN_YES;
		1441	}
		1442
		1443	void
		1444	munmap (SV *scalar)
		1445	PROTOTYPE: $
		1446	CODE:
		1447	sv_unmagic (scalar, MMAP_MAGIC);
		1448
		1449	int
		1450	madvise (SV *scalar, off_t offset, off_t length, IV advice)
		1451	PROTOTYPE: $$$$
		1452	CODE:
		1453	{
		1454	char *addr = SvPV_nolen (scalar) + offset;
		1455
		1456	if (!SvOK (ST (2)))
		1457	length = SvCUR (scalar) - offset;
		1458
		1459	if (addr >= SvEND (scalar) || length <= 0)
		1460	XSRETURN_EMPTY;
		1461
		1462	RETVAL = posix_madvise (addr, length, advice);
		1463	}
		1464	OUTPUT:
		1465	RETVAL
		1466
		1467	int
		1468	mlockall (int flags)
		1469	PROTOTYPE: $
		1470	CODE:
		1471	#if _POSIX_MEMLOCK
		1472	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1473	extern int mallopt (int, int);
		1474	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1475	#endif
		1476	mlockall (flags);
		1477	#else
		1478	RETVAL = -1;
		1479	errno = ENOSYS;
		1480	#endif
		1481	OUTPUT:
		1482	RETVAL
		1483
		1484	int
		1485	munlockall ()
		1486	PROTOTYPE:
		1487	CODE:
		1488	#if _POSIX_MEMLOCK
		1489	munlockall ();
		1490	#else
		1491	RETVAL = -1;
		1492	errno = ENOSYS;
		1493	#endif
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	void _on_next_submit (SV *cb)
		1498	CODE:
		1499	SvREFCNT_dec (on_next_submit);
		1500	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1501
		1502	PROTOTYPES: DISABLE
		1503
		1504	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1505
		1506	void
		1507	cancel (aio_req_ornot req)
		1508	CODE:
		1509	eio_cancel (req);
		1510
		1511	void
		1512	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1513	PPCODE:
		1514	{
		1515	if (GIMME_V != G_VOID)
		1516	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1517
		1518	if (items > 1)
		1519	{
		1520	SV *cb_cv =get_cb (callback);
		1521
		1522	SvREFCNT_dec (req->callback);
		1523	req->callback = SvREFCNT_inc (cb_cv);
		1524	}
		1525	}
		1526
		1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1528
		1529	void
		1530	add (aio_req grp, ...)
		1531	PPCODE:
		1532	{
		1533	int i;
		1534
		1535	if (grp->int1 == 2)
		1536	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1537
		1538	for (i = 1; i < items; ++i )
		1539	{
		1540	aio_req req;
		1541
		1542	if (GIMME_V != G_VOID)
		1543	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1544
		1545	req = SvAIO_REQ (ST (i));
		1546
		1547	if (req)
		1548	eio_grp_add (grp, req);
		1549	}
		1550	}
		1551
		1552	void
		1553	cancel_subs (aio_req_ornot req)
		1554	CODE:
		1555	req_cancel_subs (req);
		1556
		1557	void
		1558	result (aio_req grp, ...)
		1559	CODE:
		1560	{
		1561	int i;
		1562	AV *av;
		1563
		1564	grp->errorno = errno;
		1565
		1566	av = newAV ();
		1567	av_extend (av, items - 1);
		1568
		1569	for (i = 1; i < items; ++i )
		1570	av_push (av, newSVsv (ST (i)));
		1571
		1572	SvREFCNT_dec (grp->sv1);
		1573	grp->sv1 = (SV *)av;
		1574	}
		1575
		1576	void
		1577	errno (aio_req grp, int errorno = errno)
		1578	CODE:
		1579	grp->errorno = errorno;
		1580
		1581	void
		1582	limit (aio_req grp, int limit)
		1583	CODE:
		1584	eio_grp_limit (grp, limit);
		1585
		1586	void
		1587	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1588	CODE:
		1589	{
		1590	SvREFCNT_dec (grp->sv2);
		1591	grp->sv2 = newSVsv (callback);
		1592	grp->feed = aio_grp_feed;
		1593
		1594	if (grp->int2 <= 0)
		1595	grp->int2 = 2;
		1596
		1597	eio_grp_limit (grp, grp->int2);
		1598	}
		1599

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