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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs.
Revision 1.184 by root, Tue Jul 5 20:34:42 2011 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12		16	#include <sys/statvfs.h>
13	#include <unistd.h>	17	#include <limits.h>
14	#include <fcntl.h>	18	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	19	#include <sched.h>
17		20
18	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		22	# include <sys/mman.h>
		23	#endif
19		24
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		27
24	#if __ia64	28	#ifdef _WIN32
25	# 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
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/config.h"
		124	#include "libeio/eio.h"
		125
		126	/* Linux/others */
		127	#ifndef O_ASYNC
		128	# define O_ASYNC 0
		129	#endif
		130	#ifndef O_DIRECT
		131	# define O_DIRECT 0
		132	#endif
		133	#ifndef O_NOATIME
		134	# define O_NOATIME 0
		135	#endif
		136
		137	/* POSIX */
		138	#ifndef O_CLOEXEC
		139	# define O_CLOEXEC 0
		140	#endif
		141	#ifndef O_NOFOLLOW
		142	# define O_NOFOLLOW 0
		143	#endif
		144	#ifndef O_NOCTTY
		145	# define O_NOCTTY 0
		146	#endif
		147	#ifndef O_NONBLOCK
		148	# define O_NONBLOCK 0
		149	#endif
		150	#ifndef O_EXEC
		151	# define O_EXEC 0
		152	#endif
		153	#ifndef O_SEARCH
		154	# define O_SEARCH 0
		155	#endif
		156	#ifndef O_DIRECTORY
		157	# define O_DIRECTORY 0
		158	#endif
		159	#ifndef O_DSYNC
		160	# define O_DSYNC 0
		161	#endif
		162	#ifndef O_RSYNC
		163	# define O_RSYNC 0
		164	#endif
		165	#ifndef O_SYNC
		166	# define O_SYNC 0
		167	#endif
		168	#ifndef O_TTY_INIT
		169	# define O_TTY_INIT 0
		170	#endif
		171
		172	#ifndef POSIX_FADV_NORMAL
		173	# define POSIX_FADV_NORMAL 0
		174	#endif
		175	#ifndef POSIX_FADV_SEQUENTIAL
		176	# define POSIX_FADV_SEQUENTIAL 0
		177	#endif
		178	#ifndef POSIX_FADV_RANDOM
		179	# define POSIX_FADV_RANDOM 0
		180	#endif
		181	#ifndef POSIX_FADV_NOREUSE
		182	# define POSIX_FADV_NOREUSE 0
		183	#endif
		184	#ifndef POSIX_FADV_WILLNEED
		185	# define POSIX_FADV_WILLNEED 0
		186	#endif
		187	#ifndef POSIX_FADV_DONTNEED
		188	# define POSIX_FADV_DONTNEED 0
		189	#endif
		190
		191	#if !HAVE_POSIX_FADVISE
		192	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		193	#endif
		194
		195	#ifndef POSIX_MADV_NORMAL
		196	# define POSIX_MADV_NORMAL 0
		197	#endif
		198	#ifndef POSIX_MADV_SEQUENTIAL
		199	# define POSIX_MADV_SEQUENTIAL 0
		200	#endif
		201	#ifndef POSIX_MADV_RANDOM
		202	# define POSIX_MADV_RANDOM 0
		203	#endif
		204	#ifndef POSIX_MADV_WILLNEED
		205	# define POSIX_MADV_WILLNEED 0
		206	#endif
		207	#ifndef POSIX_MADV_DONTNEED
		208	# define POSIX_MADV_DONTNEED 0
		209	#endif
		210
		211	#if !HAVE_POSIX_MADVISE
		212	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		213	#endif
		214
		215	#ifndef PROT_NONE
		216	# define PROT_NONE 0
		217	#endif
		218	#ifndef PROT_READ
		219	# define PROT_READ 0
		220	#endif
		221	#ifndef PROT_WRITE
		222	# define PROT_READ 0
		223	#endif
		224	#ifndef PROT_EXEC
		225	# define PROT_EXEC 0
		226	#endif
		227
		228	#ifndef ST_NODEV
		229	# define ST_NODEV 0
		230	#endif
		231	#ifndef ST_NOEXEC
		232	# define ST_NOEXEC 0
		233	#endif
		234	#ifndef ST_SYNCHRONOUS
		235	# define ST_SYNCHRONOUS 0
		236	#endif
		237	#ifndef ST_MANDLOCK
		238	# define ST_MANDLOCK 0
		239	#endif
		240	#ifndef ST_WRITE
		241	# define ST_WRITE 0
		242	#endif
		243	#ifndef ST_APPEND
		244	# define ST_APPEND 0
		245	#endif
		246	#ifndef ST_IMMUTABLE
		247	# define ST_IMMUTABLE 0
		248	#endif
		249	#ifndef ST_NOATIME
		250	# define ST_NOATIME 0
		251	#endif
		252	#ifndef ST_NODIRATIME
		253	# define ST_NODIRATIME 0
		254	#endif
		255	#ifndef ST_RELATIME
		256	# define ST_RELATIME 0
		257	#endif
		258
		259	#ifndef S_IFIFO
		260	# define S_IFIFO 0
		261	#endif
		262	#ifndef S_IFCHR
		263	# define S_IFCHR 0
		264	#endif
		265	#ifndef S_IFBLK
		266	# define S_IFBLK 0
		267	#endif
		268	#ifndef S_IFLNK
		269	# define S_IFLNK 0
		270	#endif
		271	#ifndef S_IFREG
		272	# define S_IFREG 0
		273	#endif
		274	#ifndef S_IFDIR
		275	# define S_IFDIR 0
		276	#endif
		277	#ifndef S_IFWHT
		278	# define S_IFWHT 0
		279	#endif
		280	#ifndef S_IFSOCK
		281	# define S_IFSOCK 0
		282	#endif
		283
		284	#ifndef MAP_ANONYMOUS
		285	# ifdef MAP_ANON
		286	# define MAP_ANONYMOUS MAP_ANON
		287	# else
		288	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	289	# endif
		290	#endif
		291	#ifndef MAP_HUGETLB
		292	# define MAP_HUGETLB 0
		293	#endif
		294	#ifndef MAP_LOCKED
		295	# define MAP_LOCKED 0
		296	#endif
		297	#ifndef MAP_NORESERVE
		298	# define MAP_NORESERVE 0
		299	#endif
		300	#ifndef MAP_POPULATE
		301	# define MAP_POPULATE 0
		302	#endif
		303	#ifndef MAP_NONBLOCK
		304	# define MAP_NONBLOCK 0
		305	#endif
		306
		307	#ifndef makedev
		308	# define makedev(maj,min) (((maj) << 8) | (min))
		309	#endif
		310	#ifndef major
		311	# define major(dev) ((dev) >> 8)
		312	#endif
		313	#ifndef minor
		314	# define minor(dev) ((dev) & 0xff)
		315	#endif
		316
		317	#ifndef PAGESIZE
		318	# define PAGESIZE sysconf (_SC_PAGESIZE)
		319	#endif
		320
		321	static int req_invoke (eio_req *req);
		322	#define EIO_FINISH(req) req_invoke (req)
		323	static void req_destroy (eio_req *grp);
		324	#define EIO_DESTROY(req) req_destroy (req)
29		325
30	enum {	326	enum {
31	REQ_QUIT,	327	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,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	328	};
39		329
40	typedef struct aio_cb {	330	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		331
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
		333	typedef eio_req *aio_req_ornot;
59		334
60	static int started;	335	static SV *on_next_submit;
61	static volatile int nreqs;	336	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	337	static int max_outstanding;
63	static int respipe [2];
64		338
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	339	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		340
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	341	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */
71
72	static void free_req (aio_req req)	342	static void req_cancel (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		343
		344	static void want_poll (void)
		345	{
		346	/* write a dummy byte to the pipe so fh becomes ready */
		347	s_epipe_signal (&respipe);
		348	}
		349
		350	static void done_poll (void)
		351	{
		352	/* read any signals sent by the worker threads */
		353	s_epipe_drain (&respipe);
		354	}
		355
		356	/* must be called at most once */
		357	static SV *req_sv (aio_req req, HV *stash)
		358	{
77	if (req->fh)	359	if (!req->self)
78	SvREFCNT_dec (req->fh);
79
80	if (req->statdata)
81	Safefree (req->statdata);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}
88
89	static void
90	poll_wait ()
91	{
92	if (nreqs && !ress)
93	{	360	{
94	fd_set rfd;	361	req->self = (SV *)newHV ();
95	FD_ZERO(&rfd);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
96	FD_SET(respipe [0], &rfd);
97
98	select (respipe [0] + 1, &rfd, 0, 0, 0);
99	}	363	}
100	}
101		364
102	static int	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
103	poll_cb ()	366	}
104	{
105	dSP;
106	int count = 0;
107	int do_croak = 0;
108	aio_req req;
109		367
110	for (;;)	368	static aio_req SvAIO_REQ (SV *sv)
		369	{
		370	MAGIC *mg;
		371
		372	if (!SvROK (sv)
		373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		374	&& SvSTASH (SvRV (sv)) != aio_req_stash
		375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		376	croak ("object of class IO::AIO::REQ expected");
		377
		378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		379
		380	return mg ? (aio_req)mg->mg_ptr : 0;
		381	}
		382
		383	static void aio_grp_feed (aio_req grp)
		384	{
		385	if (grp->sv2 && SvOK (grp->sv2))
111	{	386	{
112	pthread_mutex_lock (&reslock);	387	dSP;
113	req = ress;
114		388
115	if (req)	389	ENTER;
		390	SAVETMPS;
		391	PUSHMARK (SP);
		392	XPUSHs (req_sv (grp, aio_grp_stash));
		393	PUTBACK;
		394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		395	SPAGAIN;
		396	FREETMPS;
		397	LEAVE;
		398	}
		399	}
		400
		401	static void req_submit (eio_req *req)
		402	{
		403	eio_submit (req);
		404
		405	if (expect_false (on_next_submit))
		406	{
		407	dSP;
		408	SV *cb = sv_2mortal (on_next_submit);
		409
		410	on_next_submit = 0;
		411
		412	PUSHMARK (SP);
		413	PUTBACK;
		414	call_sv (cb, G_DISCARD | G_EVAL);
		415	}
		416	}
		417
		418	static int req_invoke (eio_req *req)
		419	{
		420	if (req->flags & FLAG_SV2_RO_OFF)
		421	SvREADONLY_off (req->sv2);
		422
		423	if (!EIO_CANCELLED (req) && req->callback)
		424	{
		425	dSP;
		426	static SV *sv_result_cache; /* caches the result integer SV */
		427	SV *sv_result;
		428
		429	ENTER;
		430	SAVETMPS;
		431	PUSHMARK (SP);
		432	EXTEND (SP, 1);
		433
		434	/* do not recreate the result IV from scratch each time */
		435	if (expect_true (sv_result_cache))
116	{	436	{
117	ress = req->next;	437	sv_result = sv_result_cache; sv_result_cache = 0;
118		438	SvIV_set (sv_result, req->result);
119	if (!ress)	439	SvIOK_only (sv_result);
120	{
121	rese = 0;
122
123	/* read any signals sent by the worker threads */
124	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)
126	;
127	}
128	}
129
130	pthread_mutex_unlock (&reslock);
131
132	if (!req)
133	break;
134
135	nreqs--;
136
137	if (req->type == REQ_QUIT)
138	started--;
139	else
140	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->statdata)
148	{
149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150	PL_laststatval = req->result;
151	PL_statcache = *(req->statdata);
152	}
153
154	ENTER;
155	PUSHMARK (SP);
156	XPUSHs (sv_2mortal (newSViv (req->result)));
157
158	if (req->type == REQ_OPEN)
159	{
160	/* convert fd to fh */
161	SV *fh;
162
163	PUTBACK;
164	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
165	SPAGAIN;
166
167	fh = SvREFCNT_inc (POPs);
168
169	PUSHMARK (SP);
170	XPUSHs (sv_2mortal (fh));
171	}
172
173	if (SvOK (req->callback))
174	{
175	PUTBACK;
176	call_sv (req->callback, G_VOID | G_EVAL);
177	SPAGAIN;
178
179	if (SvTRUE (ERRSV))
180	{
181	free_req (req);
182	croak (0);
183	}
184	}
185
186	LEAVE;
187
188	errno = errorno;
189	count++;
190	}
191
192	free_req (req);
193	}
194
195	return count;
196	}
197
198	static void *aio_proc(void *arg);
199
200	static void
201	start_thread (void)
202	{
203	sigset_t fullsigset, oldsigset;
204	pthread_t tid;
205	pthread_attr_t attr;
206
207	pthread_attr_init (&attr);
208	pthread_attr_setstacksize (&attr, STACKSIZE);
209	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
210
211	sigfillset (&fullsigset);
212	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
213
214	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
215	started++;
216
217	sigprocmask (SIG_SETMASK, &oldsigset, 0);
218	}
219
220	static void
221	send_req (aio_req req)
222	{
223	nreqs++;
224
225	pthread_mutex_lock (&reqlock);
226
227	req->next = 0;
228
229	if (reqe)
230	{
231	reqe->next = req;
232	reqe = req;
233	}
234	else
235	reqe = reqs = req;
236
237	pthread_cond_signal (&reqwait);
238	pthread_mutex_unlock (&reqlock);
239
240	if (nreqs > max_outstanding)
241	for (;;)
242	{
243	poll_cb ();
244
245	if (nreqs <= max_outstanding)
246	break;
247
248	poll_wait ();
249	}
250	}
251
252	static void
253	end_thread (void)
254	{
255	aio_req req;
256	Newz (0, req, 1, aio_cb);
257	req->type = REQ_QUIT;
258
259	send_req (req);
260	}
261
262	static void min_parallel (int nthreads)
263	{
264	while (nthreads > started)
265	start_thread ();
266	}
267
268	static void max_parallel (int nthreads)
269	{
270	int cur = started;
271
272	while (cur > nthreads)
273	{
274	end_thread ();
275	cur--;
276	}
277
278	while (started > nthreads)
279	{
280	poll_wait ();
281	poll_cb ();
282	}
283	}
284
285	static void create_pipe ()
286	{
287	if (pipe (respipe))
288	croak ("unable to initialize result pipe");
289
290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
291	croak ("cannot set result pipe to nonblocking mode");
292
293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295	}
296
297	static void atfork_prepare (void)
298	{
299	for (;;) {
300
301	for (;;)
302	{
303	poll_cb ();
304
305	if (!nreqs)
306	break;
307
308	poll_wait ();
309	}
310
311	pthread_mutex_lock (&reqlock);
312
313	if (!nreqs)
314	break;
315
316	pthread_mutex_unlock (&reqlock);
317	}
318
319	pthread_mutex_lock (&reslock);
320
321	assert (!nreqs && !reqs && !ress);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}
329
330	static void atfork_child (void)
331	{
332	int restart = started;
333	started = 0;
334
335	atfork_parent ();
336
337	min_parallel (restart);
338	}
339
340	/*****************************************************************************/
341	/* work around various missing functions */
342
343	#if !HAVE_PREADWRITE
344	# define pread aio_pread
345	# define pwrite aio_pwrite
346
347	/*
348	* make our pread/pwrite safe against themselves, but not against
349	* normal read/write by using a mutex. slows down execution a lot,
350	* but that's your problem, not mine.
351	*/
352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
353
354	static ssize_t
355	pread (int fd, void *buf, size_t count, off_t offset)
356	{
357	ssize_t res;
358	off_t ooffset;
359
360	pthread_mutex_lock (&iolock);
361	ooffset = lseek (fd, 0, SEEK_CUR);
362	lseek (fd, offset, SEEK_SET);
363	res = read (fd, buf, count);
364	lseek (fd, ooffset, SEEK_SET);
365	pthread_mutex_unlock (&iolock);
366
367	return res;
368	}
369
370	static ssize_t
371	pwrite (int fd, void *buf, size_t count, off_t offset)
372	{
373	ssize_t res;
374	off_t ooffset;
375
376	pthread_mutex_lock (&iolock);
377	ooffset = lseek (fd, 0, SEEK_CUR);
378	lseek (fd, offset, SEEK_SET);
379	res = write (fd, buf, count);
380	lseek (fd, offset, SEEK_SET);
381	pthread_mutex_unlock (&iolock);
382
383	return res;
384	}
385	#endif
386
387	#if !HAVE_FDATASYNC
388	# define fdatasync fsync
389	#endif
390
391	#if !HAVE_READAHEAD
392	# define readahead aio_readahead
393
394	static char readahead_buf[4096];
395
396	static ssize_t
397	readahead (int fd, off_t offset, size_t count)
398	{
399	while (count > 0)
400	{
401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
402
403	pread (fd, readahead_buf, len, offset);
404	offset += len;
405	count -= len;
406	}
407
408	errno = 0;
409	}
410	#endif
411
412	/*****************************************************************************/
413
414	static void *
415	aio_proc (void *thr_arg)
416	{
417	aio_req req;
418	int type;
419
420	do
421	{
422	pthread_mutex_lock (&reqlock);
423
424	for (;;)
425	{
426	req = reqs;
427
428	if (reqs)
429	{
430	reqs = reqs->next;
431	if (!reqs) reqe = 0;
432	}
433
434	if (req)
435	break;
436
437	pthread_cond_wait (&reqwait, &reqlock);
438	}
439
440	pthread_mutex_unlock (&reqlock);
441
442	errno = 0; /* strictly unnecessary */
443
444	type = req->type;
445
446	switch (type)
447	{
448	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
449	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450
451	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
452
453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456
457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
458	case REQ_CLOSE: req->result = close (req->fd); break;
459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
462
463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
464	case REQ_FSYNC: req->result = fsync (req->fd); break;
465
466	case REQ_QUIT:
467	break;
468
469	default:
470	req->result = ENOSYS;
471	break;
472	}
473
474	req->errorno = errno;
475
476	pthread_mutex_lock (&reslock);
477
478	req->next = 0;
479
480	if (rese)
481	{
482	rese->next = req;
483	rese = req;
484	}	440	}
485	else	441	else
486	{	442	{
487	rese = ress = req;	443	sv_result = newSViv (req->result);
488		444	SvREADONLY_on (sv_result);
489	/* write a dummy byte to the pipe so fh becomes ready */
490	write (respipe [1], &respipe, 1);
491	}	445	}
492		446
493	pthread_mutex_unlock (&reslock);	447	switch (req->type)
		448	{
		449	case EIO_READDIR:
		450	{
		451	SV *rv = &PL_sv_undef;
		452
		453	if (req->result >= 0)
		454	{
		455	int i;
		456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		458	AV *av = newAV ();
		459
		460	av_extend (av, req->result - 1);
		461
		462	for (i = 0; i < req->result; ++i)
		463	{
		464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		467
		468	if (req->int1 & EIO_READDIR_CUSTOM2)
		469	{
		470	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		471	AV *avent = newAV ();
		472
		473	av_extend (avent, 2);
		474
		475	if (!sv_type [ent->type])
		476	{
		477	sv_type [ent->type] = newSViv (ent->type);
		478	SvREADONLY_on (sv_type [ent->type]);
		479	}
		480
		481	av_store (avent, 0, namesv);
		482	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		483	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		484
		485	av_store (av, i, newRV_noinc ((SV *)avent));
		486	}
		487	else
		488	av_store (av, i, namesv);
		489
		490	++ent;
		491	}
		492	else
		493	{
		494	SV *name = newSVpv (names, 0);
		495	av_store (av, i, name);
		496	names += SvCUR (name) + 1;
		497	}
		498	}
		499
		500	rv = sv_2mortal (newRV_noinc ((SV *)av));
		501	}
		502
		503	PUSHs (rv);
		504
		505	if (req->int1 & EIO_READDIR_CUSTOM1)
		506	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		507	}
		508	break;
		509
		510	case EIO_OPEN:
		511	{
		512	/* convert fd to fh */
		513	SV *fh = &PL_sv_undef;
		514
		515	if (req->result >= 0)
		516	{
		517	GV *gv = (GV *)sv_newmortal ();
		518	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		519	char sym [64];
		520	int symlen;
		521
		522	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		523	gv_init (gv, aio_stash, sym, symlen, 0);
		524
		525	symlen = snprintf (
		526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
		537	PUSHs (fh);
		538	}
		539	break;
		540
		541	case EIO_STATVFS:
		542	case EIO_FSTATVFS:
		543	{
		544	SV *rv = &PL_sv_undef;
		545
		546	if (req->result >= 0)
		547	{
		548	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		549	HV *hv = newHV ();
		550
		551	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		552
		553	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		554	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		555	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		556	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		557	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		558	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		559	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		560	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		561	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		562	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		563	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		564	}
		565
		566	PUSHs (rv);
		567	}
		568
		569	break;
		570
		571	case EIO_GROUP:
		572	req->int1 = 2; /* mark group as finished */
		573
		574	if (req->sv1)
		575	{
		576	int i;
		577	AV *av = (AV *)req->sv1;
		578
		579	EXTEND (SP, AvFILL (av) + 1);
		580	for (i = 0; i <= AvFILL (av); ++i)
		581	PUSHs (*av_fetch (av, i, 0));
		582	}
		583	break;
		584
		585	case EIO_NOP:
		586	case EIO_BUSY:
		587	break;
		588
		589	case EIO_READLINK:
		590	case EIO_REALPATH:
		591	if (req->result > 0)
		592	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		593	break;
		594
		595	case EIO_STAT:
		596	case EIO_LSTAT:
		597	case EIO_FSTAT:
		598	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		599	PL_laststatval = req->result;
		600	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		601	PUSHs (sv_result);
		602	break;
		603
		604	case EIO_READ:
		605	{
		606	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		607	*SvEND (req->sv2) = 0;
		608	SvPOK_only (req->sv2);
		609	SvSETMAGIC (req->sv2);
		610	PUSHs (sv_result);
		611	}
		612	break;
		613
		614	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		615	if (req->result > 0)
		616	SvIV_set (sv_result, 0);
		617	/* FALLTHROUGH */
		618
		619	default:
		620	PUSHs (sv_result);
		621	break;
		622	}
		623
		624	errno = req->errorno;
		625
		626	PUTBACK;
		627	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		628	SPAGAIN;
		629
		630	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		631	SvREFCNT_dec (sv_result);
		632	else
		633	sv_result_cache = sv_result;
		634
		635	FREETMPS;
		636	LEAVE;
		637
		638	PUTBACK;
494	}	639	}
495	while (type != REQ_QUIT);	640
		641	return !!SvTRUE (ERRSV);
		642	}
		643
		644	static void req_destroy (aio_req req)
		645	{
		646	if (req->self)
		647	{
		648	sv_unmagic (req->self, PERL_MAGIC_ext);
		649	SvREFCNT_dec (req->self);
		650	}
		651
		652	SvREFCNT_dec (req->sv1);
		653	SvREFCNT_dec (req->sv2);
		654	SvREFCNT_dec (req->callback);
		655
		656	Safefree (req);
		657	}
		658
		659	static void req_cancel_subs (aio_req grp)
		660	{
		661	aio_req sub;
		662
		663	if (grp->type != EIO_GROUP)
		664	return;
		665
		666	SvREFCNT_dec (grp->sv2);
		667	grp->sv2 = 0;
		668
		669	eio_grp_cancel (grp);
		670	}
		671
		672	static void create_respipe (void)
		673	{
		674	if (s_epipe_renew (&respipe))
		675	croak ("IO::AIO: unable to initialize result pipe");
		676	}
		677
		678	static void poll_wait (void)
		679	{
		680	while (eio_nreqs ())
		681	{
		682	int size;
		683
		684	X_LOCK (reslock);
		685	size = res_queue.size;
		686	X_UNLOCK (reslock);
		687
		688	if (size)
		689	return;
		690
		691	etp_maybe_start_thread ();
		692
		693	s_epipe_wait (&respipe);
		694	}
		695	}
		696
		697	static int poll_cb (void)
		698	{
		699	for (;;)
		700	{
		701	int res = eio_poll ();
		702
		703	if (res > 0)
		704	croak (0);
		705
		706	if (!max_outstanding || max_outstanding > eio_nreqs ())
		707	return res;
		708
		709	poll_wait ();
		710	}
		711	}
		712
		713	static void atfork_child (void)
		714	{
		715	create_respipe ();
		716	}
		717
		718	/*****************************************************************************/
		719
		720	#if !_POSIX_MAPPED_FILES
		721	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		722	# define munmap(addr,length) (errno = ENOSYS, -1)
		723	#endif
		724
		725	#if !_POSIX_MEMORY_PROTECTION
		726	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		727	# define PROT_NONE 0
		728	# define PROT_WRITE 0
		729	# define MAP_PRIVATE 0
		730	# define MAP_SHARED 0
		731	# define MAP_FIXED 0
		732	#endif
		733
		734	#define MMAP_MAGIC PERL_MAGIC_ext
		735
		736	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		737	{
		738	int old_errno = errno;
		739	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		740	errno = old_errno;
		741
		742	mg->mg_obj = 0; /* just in case */
		743
		744	SvREADONLY_off (sv);
		745
		746	if (SvPVX (sv) != mg->mg_ptr)
		747	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		748
		749	SvCUR_set (sv, 0);
		750	SvPVX (sv) = 0;
		751	SvOK_off (sv);
496		752
497	return 0;	753	return 0;
498	}	754	}
499		755
		756	static MGVTBL mmap_vtbl = {
		757	0, 0, 0, 0, mmap_free
		758	};
		759
		760	/*****************************************************************************/
		761
		762	static SV * get_cb (SV *cb_sv)
		763	{
		764	SvGETMAGIC (cb_sv);
		765	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		766	}
		767
500	#define dREQ \	768	#define dREQ \
		769	SV *cb_cv; \
501	aio_req req; \	770	aio_req req; \
		771	int req_pri = next_pri; \
		772	next_pri = EIO_PRI_DEFAULT; \
502	\	773	\
503	if (SvOK (callback) && !SvROK (callback)) \	774	cb_cv = get_cb (callback); \
504	croak ("clalback must be undef or of reference type"); \
505	\	775	\
506	Newz (0, req, 1, aio_cb); \	776	Newz (0, req, 1, eio_req); \
507	if (!req) \	777	if (!req) \
508	croak ("out of memory during aio_req allocation"); \	778	croak ("out of memory during eio_req allocation"); \
509	\	779	\
510	req->callback = newSVsv (callback);	780	req->callback = SvREFCNT_inc (cb_cv); \
511		781	req->pri = req_pri
		782
		783	#define REQ_SEND \
		784	PUTBACK; \
		785	req_submit (req); \
		786	SPAGAIN; \
		787	\
		788	if (GIMME_V != G_VOID) \
		789	XPUSHs (req_sv (req, aio_req_stash));
		790
512	MODULE = IO::AIO PACKAGE = IO::AIO	791	MODULE = IO::AIO PACKAGE = IO::AIO
513		792
514	PROTOTYPES: ENABLE	793	PROTOTYPES: ENABLE
515		794
516	BOOT:	795	BOOT:
517	{	796	{
		797	static const struct {
		798	const char *name;
		799	IV iv;
		800	} *civ, const_iv[] = {
		801	# define const_niv(name, value) { # name, (IV) value },
		802	# define const_iv(name) { # name, (IV) name },
		803	# define const_eio(name) { # name, (IV) EIO_ ## name },
		804	const_iv (EXDEV)
		805	const_iv (ENOSYS)
		806	const_iv (O_RDONLY)
		807	const_iv (O_WRONLY)
		808	const_iv (O_RDWR)
		809	const_iv (O_CREAT)
		810	const_iv (O_TRUNC)
		811	const_iv (O_EXCL)
		812	const_iv (O_APPEND)
		813
		814	const_iv (O_ASYNC)
		815	const_iv (O_DIRECT)
		816	const_iv (O_NOATIME)
		817
		818	const_iv (O_CLOEXEC)
		819	const_iv (O_NOCTTY)
		820	const_iv (O_NOFOLLOW)
		821	const_iv (O_NONBLOCK)
		822	const_iv (O_EXEC)
		823	const_iv (O_SEARCH)
		824	const_iv (O_DIRECTORY)
		825	const_iv (O_DSYNC)
		826	const_iv (O_RSYNC)
		827	const_iv (O_SYNC)
		828	const_iv (O_TTY_INIT)
		829
		830	const_iv (S_IFIFO)
		831	const_iv (S_IFCHR)
		832	const_iv (S_IFBLK)
		833	const_iv (S_IFLNK)
		834	const_iv (S_IFREG)
		835	const_iv (S_IFDIR)
		836	const_iv (S_IFWHT)
		837	const_iv (S_IFSOCK)
		838	const_iv (S_IFMT)
		839
		840	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		841	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		842	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		843	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		844	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		845	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		846
		847	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		848	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		849	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		850	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		851	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		852
		853	const_iv (ST_RDONLY)
		854	const_iv (ST_NOSUID)
		855	const_iv (ST_NODEV)
		856	const_iv (ST_NOEXEC)
		857	const_iv (ST_SYNCHRONOUS)
		858	const_iv (ST_MANDLOCK)
		859	const_iv (ST_WRITE)
		860	const_iv (ST_APPEND)
		861	const_iv (ST_IMMUTABLE)
		862	const_iv (ST_NOATIME)
		863	const_iv (ST_NODIRATIME)
		864	const_iv (ST_RELATIME)
		865
		866	const_iv (PROT_NONE)
		867	const_iv (PROT_EXEC)
		868	const_iv (PROT_READ)
		869	const_iv (PROT_WRITE)
		870
		871	/*const_iv (MAP_FIXED)*/
		872	const_iv (MAP_PRIVATE)
		873	const_iv (MAP_SHARED)
		874	const_iv (MAP_ANONYMOUS)
		875
		876	/* linuxish */
		877	const_iv (MAP_HUGETLB)
		878	const_iv (MAP_LOCKED)
		879	const_iv (MAP_NORESERVE)
		880	const_iv (MAP_POPULATE)
		881	const_iv (MAP_NONBLOCK)
		882
		883	const_eio (MCL_FUTURE)
		884	const_eio (MCL_CURRENT)
		885
		886	const_eio (MS_ASYNC)
		887	const_eio (MS_INVALIDATE)
		888	const_eio (MS_SYNC)
		889
		890	const_eio (MT_MODIFY)
		891
		892	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		893	const_eio (SYNC_FILE_RANGE_WRITE)
		894	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		895
		896	const_eio (READDIR_DENTS)
		897	const_eio (READDIR_DIRS_FIRST)
		898	const_eio (READDIR_STAT_ORDER)
		899	const_eio (READDIR_FOUND_UNKNOWN)
		900
		901	const_eio (DT_UNKNOWN)
		902	const_eio (DT_FIFO)
		903	const_eio (DT_CHR)
		904	const_eio (DT_DIR)
		905	const_eio (DT_BLK)
		906	const_eio (DT_REG)
		907	const_eio (DT_LNK)
		908	const_eio (DT_SOCK)
		909	const_eio (DT_WHT)
		910	};
		911
		912	aio_stash = gv_stashpv ("IO::AIO" , 1);
		913	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		914	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		915
		916	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		917	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		918
		919	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		920
518	create_pipe ();	921	create_respipe ();
519	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
520	}
521		922
		923	if (eio_init (want_poll, done_poll) < 0)
		924	croak ("IO::AIO: unable to initialise eio library");
		925
		926	/* atfork child called in fifo order, so before eio's handler */
		927	X_THREAD_ATFORK (0, 0, atfork_child);
		928	}
		929
522	void	930	void
523	min_parallel(nthreads)	931	max_poll_reqs (unsigned int nreqs)
524	int nthreads
525	PROTOTYPE: $	932	PROTOTYPE: $
		933	CODE:
		934	eio_set_max_poll_reqs (nreqs);
526		935
527	void	936	void
528	max_parallel(nthreads)	937	max_poll_time (double nseconds)
529	int nthreads
530	PROTOTYPE: $	938	PROTOTYPE: $
531
532	int
533	max_outstanding(nreqs)
534	int nreqs
535	PROTOTYPE: $
536	CODE:	939	CODE:
537	RETVAL = max_outstanding;	940	eio_set_max_poll_time (nseconds);
		941
		942	void
		943	min_parallel (unsigned int nthreads)
		944	PROTOTYPE: $
		945	CODE:
		946	eio_set_min_parallel (nthreads);
		947
		948	void
		949	max_parallel (unsigned int nthreads)
		950	PROTOTYPE: $
		951	CODE:
		952	eio_set_max_parallel (nthreads);
		953
		954	void
		955	max_idle (unsigned int nthreads)
		956	PROTOTYPE: $
		957	CODE:
		958	eio_set_max_idle (nthreads);
		959
		960	void
		961	idle_timeout (unsigned int seconds)
		962	PROTOTYPE: $
		963	CODE:
		964	eio_set_idle_timeout (seconds);
		965
		966	void
		967	max_outstanding (unsigned int maxreqs)
		968	PROTOTYPE: $
		969	CODE:
538	max_outstanding = nreqs;	970	max_outstanding = maxreqs;
539		971
540	void	972	void
541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	973	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
542	SV * pathname
543	int flags
544	int mode
545	SV * callback
546	PROTOTYPE: $$$;$
547	CODE:	974	PPCODE:
548	{	975	{
549	dREQ;	976	dREQ;
550		977
551	req->type = REQ_OPEN;	978	req->type = EIO_OPEN;
552	req->data = newSVsv (pathname);	979	req->sv1 = newSVsv (pathname);
553	req->dataptr = SvPVbyte_nolen (req->data);	980	req->ptr1 = SvPVbyte_nolen (req->sv1);
554	req->fd = flags;	981	req->int1 = flags;
555	req->mode = mode;	982	req->int2 = mode;
556		983
557	send_req (req);	984	REQ_SEND;
558	}	985	}
559		986
560	void	987	void
561	aio_close(fh,callback=&PL_sv_undef)	988	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
562	SV * fh
563	SV * callback
564	PROTOTYPE: $;$
565	ALIAS:	989	ALIAS:
566	aio_close = REQ_CLOSE
567	aio_fsync = REQ_FSYNC	990	aio_fsync = EIO_FSYNC
568	aio_fdatasync = REQ_FDATASYNC	991	aio_fdatasync = EIO_FDATASYNC
569	CODE:	992	PPCODE:
570	{	993	{
		994	int fd = s_fileno_croak (fh, 0);
571	dREQ;	995	dREQ;
572		996
573	req->type = ix;	997	req->type = ix;
574	req->fh = newSVsv (fh);	998	req->sv1 = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	999	req->int1 = fd;
576		1000
577	send_req (req);	1001	REQ_SEND (req);
578	}	1002	}
579		1003
580	void	1004	void
		1005	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1006	PPCODE:
		1007	{
		1008	int fd = s_fileno_croak (fh, 0);
		1009	dREQ;
		1010
		1011	req->type = EIO_SYNC_FILE_RANGE;
		1012	req->sv1 = newSVsv (fh);
		1013	req->int1 = fd;
		1014	req->offs = offset;
		1015	req->size = nbytes;
		1016	req->int2 = flags;
		1017
		1018	REQ_SEND (req);
		1019	}
		1020
		1021	void
		1022	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1023	PPCODE:
		1024	{
		1025	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		1026	int fd = s_fileno_croak (fh, 0);
		1027	dREQ;
		1028
		1029	if (close_pipe < 0)
		1030	{
		1031	int pipefd [2];
		1032
		1033	if (pipe (pipefd) < 0
		1034	|| close (pipefd [1]) < 0
		1035	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1036	abort (); /*D*/
		1037
		1038	close_pipe = pipefd [0];
		1039	}
		1040
		1041	req->type = EIO_DUP2;
		1042	req->int1 = close_pipe;
		1043	req->sv2 = newSVsv (fh);
		1044	req->int2 = fd;
		1045
		1046	REQ_SEND (req);
		1047	}
		1048
		1049	void
581	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1050	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
582	SV * fh
583	UV offset
584	IV length
585	SV * data
586	IV dataoffset
587	SV * callback
588	ALIAS:	1051	ALIAS:
589	aio_read = REQ_READ	1052	aio_read = EIO_READ
590	aio_write = REQ_WRITE	1053	aio_write = EIO_WRITE
591	PROTOTYPE: $$$$$;$
592	CODE:	1054	PPCODE:
593	{	1055	{
594	aio_req req;
595	STRLEN svlen;	1056	STRLEN svlen;
		1057	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
596	char *svptr = SvPVbyte (data, svlen);	1058	char *svptr = SvPVbyte (data, svlen);
597		1059	UV len = SvUV (length);
598	SvUPGRADE (data, SVt_PV);
599	SvPOK_on (data);
600		1060
601	if (dataoffset < 0)	1061	if (dataoffset < 0)
602	dataoffset += svlen;	1062	dataoffset += svlen;
603		1063
604	if (dataoffset < 0 || dataoffset > svlen)	1064	if (dataoffset < 0 || dataoffset > svlen)
605	croak ("data offset outside of string");	1065	croak ("dataoffset outside of data scalar");
606		1066
607	if (ix == REQ_WRITE)	1067	if (ix == EIO_WRITE)
608	{	1068	{
609	/* write: check length and adjust. */	1069	/* write: check length and adjust. */
610	if (length < 0 || length + dataoffset > svlen)	1070	if (!SvOK (length) || len + dataoffset > svlen)
611	length = svlen - dataoffset;	1071	len = svlen - dataoffset;
612	}	1072	}
613	else	1073	else
614	{	1074	{
615	/* read: grow scalar as necessary */	1075	/* read: check type and grow scalar as necessary */
		1076	SvUPGRADE (data, SVt_PV);
616	svptr = SvGROW (data, length + dataoffset);	1077	svptr = SvGROW (data, len + dataoffset + 1);
617	}	1078	}
618
619	if (length < 0)
620	croak ("length must not be negative");
621		1079
622	{	1080	{
623	dREQ;	1081	dREQ;
624		1082
625	req->type = ix;	1083	req->type = ix;
626	req->fh = newSVsv (fh);	1084	req->sv1 = newSVsv (fh);
627	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1085	req->int1 = fd;
628	: IoOFP (sv_2io (fh)));	1086	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
629	req->offset = offset;	1087	req->size = len;
630	req->length = length;
631	req->data = SvREFCNT_inc (data);	1088	req->sv2 = SvREFCNT_inc (data);
632	req->dataptr = (char *)svptr + dataoffset;	1089	req->ptr2 = (char *)svptr + dataoffset;
		1090	req->stroffset = dataoffset;
633		1091
634	send_req (req);	1092	if (!SvREADONLY (data))
		1093	{
		1094	SvREADONLY_on (data);
		1095	req->flags |= FLAG_SV2_RO_OFF;
		1096	}
		1097
		1098	REQ_SEND;
635	}	1099	}
636	}	1100	}
637		1101
638	void	1102	void
639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1103	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
640	SV * fh	1104	ALIAS:
641	UV offset	1105	aio_readlink = EIO_READLINK
642	IV length	1106	aio_realpath = EIO_REALPATH
643	SV * callback
644	PROTOTYPE: $$$;$
645	CODE:	1107	PPCODE:
646	{	1108	{
		1109	SV *data;
		1110	dREQ;
		1111
		1112	req->type = ix;
		1113	req->sv1 = newSVsv (path);
		1114	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1115
		1116	REQ_SEND;
		1117	}
		1118
		1119	void
		1120	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1121	PPCODE:
		1122	{
		1123	int ifd = s_fileno_croak (in_fh , 0);
		1124	int ofd = s_fileno_croak (out_fh, 1);
647	dREQ;	1125	dREQ;
648		1126
		1127	req->type = EIO_SENDFILE;
		1128	req->sv1 = newSVsv (out_fh);
		1129	req->int1 = ofd;
		1130	req->sv2 = newSVsv (in_fh);
		1131	req->int2 = ifd;
		1132	req->offs = in_offset;
		1133	req->size = length;
		1134
		1135	REQ_SEND;
		1136	}
		1137
		1138	void
		1139	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1140	PPCODE:
		1141	{
		1142	int fd = s_fileno_croak (fh, 0);
		1143	dREQ;
		1144
649	req->type = REQ_READAHEAD;	1145	req->type = EIO_READAHEAD;
650	req->fh = newSVsv (fh);	1146	req->sv1 = newSVsv (fh);
651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1147	req->int1 = fd;
652	req->offset = offset;	1148	req->offs = offset;
653	req->length = length;	1149	req->size = length;
654		1150
655	send_req (req);	1151	REQ_SEND;
656	}	1152	}
657		1153
658	void	1154	void
659	aio_stat(fh_or_path,callback=&PL_sv_undef)	1155	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
660	SV * fh_or_path
661	SV * callback
662	ALIAS:	1156	ALIAS:
663	aio_stat = REQ_STAT	1157	aio_stat = EIO_STAT
664	aio_lstat = REQ_LSTAT	1158	aio_lstat = EIO_LSTAT
		1159	aio_statvfs = EIO_STATVFS
665	CODE:	1160	PPCODE:
666	{	1161	{
667	dREQ;	1162	dREQ;
668		1163
669	New (0, req->statdata, 1, Stat_t);	1164	req->sv1 = newSVsv (fh_or_path);
670	if (!req->statdata)
671	{
672	free_req (req);
673	croak ("out of memory during aio_req->statdata allocation");
674	}
675		1165
676	if (SvPOK (fh_or_path))	1166	if (SvPOK (req->sv1))
677	{	1167	{
678	req->type = ix;	1168	req->type = ix;
679	req->data = newSVsv (fh_or_path);
680	req->dataptr = SvPVbyte_nolen (req->data);	1169	req->ptr1 = SvPVbyte_nolen (req->sv1);
681	}	1170	}
682	else	1171	else
683	{	1172	{
684	req->type = REQ_FSTAT;	1173	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
685	req->fh = newSVsv (fh_or_path);
686	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1174	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
687	}	1175	}
688		1176
689	send_req (req);	1177	REQ_SEND;
690	}	1178	}
691		1179
		1180	UV
		1181	major (UV dev)
		1182	ALIAS:
		1183	minor = 1
		1184	CODE:
		1185	RETVAL = ix ? major (dev) : minor (dev);
		1186	OUTPUT:
		1187	RETVAL
		1188
		1189	UV
		1190	makedev (UV maj, UV min)
		1191	CODE:
		1192	RETVAL = makedev (maj, min);
		1193	OUTPUT:
		1194	RETVAL
		1195
692	void	1196	void
		1197	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1198	PPCODE:
		1199	{
		1200	dREQ;
		1201
		1202	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1203	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1204	req->sv1 = newSVsv (fh_or_path);
		1205
		1206	if (SvPOK (req->sv1))
		1207	{
		1208	req->type = EIO_UTIME;
		1209	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1210	}
		1211	else
		1212	{
		1213	req->type = EIO_FUTIME;
		1214	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1215	}
		1216
		1217	REQ_SEND;
		1218	}
		1219
		1220	void
		1221	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->sv1 = newSVsv (fh_or_path);
		1227	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1228
		1229	if (SvPOK (req->sv1))
		1230	{
		1231	req->type = EIO_TRUNCATE;
		1232	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1233	}
		1234	else
		1235	{
		1236	req->type = EIO_FTRUNCATE;
		1237	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1238	}
		1239
		1240	REQ_SEND;
		1241	}
		1242
		1243	void
		1244	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1245	ALIAS:
		1246	aio_chmod = EIO_CHMOD
		1247	aio_mkdir = EIO_MKDIR
		1248	PPCODE:
		1249	{
		1250	dREQ;
		1251
		1252	req->int2 = mode;
		1253	req->sv1 = newSVsv (fh_or_path);
		1254
		1255	if (SvPOK (req->sv1))
		1256	{
		1257	req->type = ix;
		1258	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1259	}
		1260	else
		1261	{
		1262	req->type = EIO_FCHMOD;
		1263	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1264	}
		1265
		1266	REQ_SEND;
		1267	}
		1268
		1269	void
		1270	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1271	PPCODE:
		1272	{
		1273	dREQ;
		1274
		1275	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1276	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1277	req->sv1 = newSVsv (fh_or_path);
		1278
		1279	if (SvPOK (req->sv1))
		1280	{
		1281	req->type = EIO_CHOWN;
		1282	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1283	}
		1284	else
		1285	{
		1286	req->type = EIO_FCHOWN;
		1287	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1288	}
		1289
		1290	REQ_SEND;
		1291	}
		1292
		1293	void
		1294	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->type = EIO_READDIR;
		1300	req->sv1 = newSVsv (pathname);
		1301	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1302	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1303
		1304	if (flags & EIO_READDIR_DENTS)
		1305	req->int1 |= EIO_READDIR_CUSTOM2;
		1306
		1307	REQ_SEND;
		1308	}
		1309
		1310	void
693	aio_unlink(pathname,callback=&PL_sv_undef)	1311	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
694	SV * pathname
695	SV * callback
696	ALIAS:	1312	ALIAS:
697	aio_unlink = REQ_UNLINK	1313	aio_unlink = EIO_UNLINK
698	aio_rmdir = REQ_RMDIR	1314	aio_rmdir = EIO_RMDIR
		1315	aio_readdir = EIO_READDIR
699	CODE:	1316	PPCODE:
700	{	1317	{
701	dREQ;	1318	dREQ;
702		1319
703	req->type = ix;	1320	req->type = ix;
704	req->data = newSVsv (pathname);	1321	req->sv1 = newSVsv (pathname);
705	req->dataptr = SvPVbyte_nolen (req->data);	1322	req->ptr1 = SvPVbyte_nolen (req->sv1);
706
707	send_req (req);
708	}
709		1323
		1324	REQ_SEND;
		1325	}
		1326
710	void	1327	void
711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1328	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
712	SV * oldpath	1329	ALIAS:
713	SV * newpath	1330	aio_link = EIO_LINK
714	SV * callback	1331	aio_symlink = EIO_SYMLINK
		1332	aio_rename = EIO_RENAME
715	CODE:	1333	PPCODE:
716	{	1334	{
717	dREQ;	1335	dREQ;
718		1336
719	req->type = REQ_SYMLINK;	1337	req->type = ix;
720	req->fh = newSVsv (oldpath);	1338	req->sv1 = newSVsv (oldpath);
721	req->data2ptr = SvPVbyte_nolen (req->fh);	1339	req->ptr1 = SvPVbyte_nolen (req->sv1);
722	req->data = newSVsv (newpath);	1340	req->sv2 = newSVsv (newpath);
723	req->dataptr = SvPVbyte_nolen (req->data);	1341	req->ptr2 = SvPVbyte_nolen (req->sv2);
724		1342
725	send_req (req);	1343	REQ_SEND;
726	}	1344	}
727		1345
728	void	1346	void
		1347	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1348	PPCODE:
		1349	{
		1350	dREQ;
		1351
		1352	req->type = EIO_MKNOD;
		1353	req->sv1 = newSVsv (pathname);
		1354	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1355	req->int2 = (mode_t)mode;
		1356	req->offs = dev;
		1357
		1358	REQ_SEND;
		1359	}
		1360
		1361	void
		1362	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1363	ALIAS:
		1364	aio_mtouch = EIO_MTOUCH
		1365	aio_msync = EIO_MSYNC
		1366	PPCODE:
		1367	{
		1368	STRLEN svlen;
		1369	char *svptr = SvPVbyte (data, svlen);
		1370	UV len = SvUV (length);
		1371
		1372	if (offset < 0)
		1373	offset += svlen;
		1374
		1375	if (offset < 0 || offset > svlen)
		1376	croak ("offset outside of scalar");
		1377
		1378	if (!SvOK (length) || len + offset > svlen)
		1379	len = svlen - offset;
		1380
		1381	{
		1382	dREQ;
		1383
		1384	req->type = ix;
		1385	req->sv2 = SvREFCNT_inc (data);
		1386	req->ptr2 = (char *)svptr + offset;
		1387	req->size = len;
		1388	req->int1 = flags;
		1389
		1390	REQ_SEND;
		1391	}
		1392	}
		1393
		1394	void
		1395	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1396	PPCODE:
		1397	{
		1398	STRLEN svlen;
		1399	char *svptr = SvPVbyte (data, svlen);
		1400	UV len = SvUV (length);
		1401
		1402	if (offset < 0)
		1403	offset += svlen;
		1404
		1405	if (offset < 0 || offset > svlen)
		1406	croak ("offset outside of scalar");
		1407
		1408	if (!SvOK (length) || len + offset > svlen)
		1409	len = svlen - offset;
		1410
		1411	{
		1412	dREQ;
		1413
		1414	req->type = EIO_MLOCK;
		1415	req->sv2 = SvREFCNT_inc (data);
		1416	req->ptr2 = (char *)svptr + offset;
		1417	req->size = len;
		1418
		1419	REQ_SEND;
		1420	}
		1421	}
		1422
		1423	void
		1424	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1425	PPCODE:
		1426	{
		1427	dREQ;
		1428
		1429	req->type = EIO_MLOCKALL;
		1430	req->int1 = flags;
		1431
		1432	REQ_SEND;
		1433	}
		1434
		1435	void
		1436	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1437	PPCODE:
		1438	{
		1439	dREQ;
		1440
		1441	req->type = EIO_BUSY;
		1442	req->nv1 = delay < 0. ? 0. : delay;
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
		1448	aio_group (SV *callback=&PL_sv_undef)
		1449	PPCODE:
		1450	{
		1451	dREQ;
		1452
		1453	req->type = EIO_GROUP;
		1454
		1455	req_submit (req);
		1456	XPUSHs (req_sv (req, aio_grp_stash));
		1457	}
		1458
		1459	void
		1460	aio_nop (SV *callback=&PL_sv_undef)
		1461	ALIAS:
		1462	aio_nop = EIO_NOP
		1463	aio_sync = EIO_SYNC
		1464	PPCODE:
		1465	{
		1466	dREQ;
		1467
		1468	req->type = ix;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	int
		1474	aioreq_pri (int pri = 0)
		1475	CODE:
		1476	RETVAL = next_pri;
		1477	if (items > 0)
		1478	{
		1479	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1480	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1481	next_pri = pri;
		1482	}
		1483	OUTPUT:
		1484	RETVAL
		1485
		1486	void
		1487	aioreq_nice (int nice = 0)
		1488	CODE:
		1489	nice = next_pri - nice;
		1490	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1491	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1492	next_pri = nice;
		1493
		1494	void
729	flush()	1495	flush ()
730	PROTOTYPE:
731	CODE:	1496	CODE:
732	while (nreqs)	1497	while (eio_nreqs ())
733	{	1498	{
734	poll_wait ();	1499	poll_wait ();
735	poll_cb ();	1500	poll_cb ();
736	}	1501	}
737		1502
738	void
739	poll()
740	PROTOTYPE:
741	CODE:
742	if (nreqs)
743	{
744	poll_wait ();
745	poll_cb ();
746	}
747
748	int	1503	int
749	poll_fileno()	1504	poll ()
750	PROTOTYPE:
751	CODE:	1505	CODE:
752	RETVAL = respipe [0];	1506	poll_wait ();
753	OUTPUT:
754	RETVAL
755
756	int
757	poll_cb(...)
758	PROTOTYPE:
759	CODE:
760	RETVAL = poll_cb ();	1507	RETVAL = poll_cb ();
761	OUTPUT:	1508	OUTPUT:
762	RETVAL	1509	RETVAL
763		1510
764	void
765	poll_wait()
766	PROTOTYPE:
767	CODE:
768	if (nreqs)
769	poll_wait ();
770
771	int	1511	int
772	nreqs()	1512	poll_fileno ()
773	PROTOTYPE:
774	CODE:	1513	CODE:
775	RETVAL = nreqs;	1514	RETVAL = s_epipe_fd (&respipe);
776	OUTPUT:	1515	OUTPUT:
777	RETVAL	1516	RETVAL
778		1517
		1518	int
		1519	poll_cb (...)
		1520	PROTOTYPE:
		1521	CODE:
		1522	RETVAL = poll_cb ();
		1523	OUTPUT:
		1524	RETVAL
		1525
		1526	void
		1527	poll_wait ()
		1528	CODE:
		1529	poll_wait ();
		1530
		1531	int
		1532	nreqs ()
		1533	CODE:
		1534	RETVAL = eio_nreqs ();
		1535	OUTPUT:
		1536	RETVAL
		1537
		1538	int
		1539	nready ()
		1540	CODE:
		1541	RETVAL = eio_nready ();
		1542	OUTPUT:
		1543	RETVAL
		1544
		1545	int
		1546	npending ()
		1547	CODE:
		1548	RETVAL = eio_npending ();
		1549	OUTPUT:
		1550	RETVAL
		1551
		1552	int
		1553	nthreads ()
		1554	CODE:
		1555	RETVAL = eio_nthreads ();
		1556	OUTPUT:
		1557	RETVAL
		1558
		1559	int
		1560	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1561	CODE:
		1562	RETVAL = posix_fadvise (fh, offset, length, advice);
		1563	OUTPUT:
		1564	RETVAL
		1565
		1566	ssize_t
		1567	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1568	CODE:
		1569	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1570	OUTPUT:
		1571	RETVAL
		1572
		1573	void
		1574	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1575	PPCODE:
		1576	sv_unmagic (scalar, MMAP_MAGIC);
		1577	{
		1578	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1579	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1580	if (addr == (void *)-1)
		1581	XSRETURN_NO;
		1582
		1583	sv_force_normal (scalar);
		1584
		1585	/* we store the length in mg_obj, as namlen is I32 :/ */
		1586	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1587	->mg_obj = (SV *)length;
		1588
		1589	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1590
		1591	if (!(prot & PROT_WRITE))
		1592	SvREADONLY_on (scalar);
		1593
		1594	if (SvLEN (scalar))
		1595	Safefree (SvPVX (scalar));
		1596
		1597	SvPVX (scalar) = (char *)addr;
		1598	SvCUR_set (scalar, length);
		1599	SvLEN_set (scalar, 0);
		1600	SvPOK_only (scalar);
		1601
		1602	XSRETURN_YES;
		1603	}
		1604
		1605	void
		1606	munmap (SV *scalar)
		1607	CODE:
		1608	sv_unmagic (scalar, MMAP_MAGIC);
		1609
		1610	int
		1611	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1612	ALIAS:
		1613	mprotect = 1
		1614	CODE:
		1615	{
		1616	STRLEN svlen;
		1617	void *addr = SvPVbyte (scalar, svlen);
		1618	size_t len = SvUV (length);
		1619
		1620	if (offset < 0)
		1621	offset += svlen;
		1622
		1623	if (offset < 0 || offset > svlen)
		1624	croak ("offset outside of scalar");
		1625
		1626	if (!SvOK (length) || len + offset > svlen)
		1627	len = svlen - offset;
		1628
		1629	addr = (void *)(((intptr_t)addr) + offset);
		1630	eio_page_align (&addr, &len);
		1631
		1632	switch (ix)
		1633	{
		1634	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1635	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1636	}
		1637	}
		1638	OUTPUT:
		1639	RETVAL
		1640
		1641	int
		1642	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1643	CODE:
		1644	{
		1645	STRLEN svlen;
		1646	void *addr = SvPVbyte (scalar, svlen);
		1647	size_t len = SvUV (length);
		1648
		1649	if (offset < 0)
		1650	offset += svlen;
		1651
		1652	if (offset < 0 || offset > svlen)
		1653	croak ("offset outside of scalar");
		1654
		1655	if (!SvOK (length) || len + offset > svlen)
		1656	len = svlen - offset;
		1657
		1658	addr = (void *)(((intptr_t)addr) + offset);
		1659	eio_page_align (&addr, &len);
		1660	#if _POSIX_MEMLOCK_RANGE
		1661	RETVAL = munlock (addr, len);
		1662	#else
		1663	RETVAL = ((errno = ENOSYS), -1);
		1664	#endif
		1665	}
		1666	OUTPUT:
		1667	RETVAL
		1668
		1669	int
		1670	munlockall ()
		1671	CODE:
		1672	#if _POSIX_MEMLOCK
		1673	munlockall ();
		1674	#else
		1675	RETVAL = -1;
		1676	errno = ENOSYS;
		1677	#endif
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	void _on_next_submit (SV *cb)
		1682	CODE:
		1683	SvREFCNT_dec (on_next_submit);
		1684	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1685
		1686	PROTOTYPES: DISABLE
		1687
		1688	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1689
		1690	void
		1691	cancel (aio_req_ornot req)
		1692	CODE:
		1693	eio_cancel (req);
		1694
		1695	void
		1696	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1697	PPCODE:
		1698	{
		1699	if (GIMME_V != G_VOID)
		1700	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1701
		1702	if (items > 1)
		1703	{
		1704	SV *cb_cv =get_cb (callback);
		1705
		1706	SvREFCNT_dec (req->callback);
		1707	req->callback = SvREFCNT_inc (cb_cv);
		1708	}
		1709	}
		1710
		1711	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1712
		1713	void
		1714	add (aio_req grp, ...)
		1715	PPCODE:
		1716	{
		1717	int i;
		1718
		1719	if (grp->int1 == 2)
		1720	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1721
		1722	for (i = 1; i < items; ++i )
		1723	{
		1724	aio_req req;
		1725
		1726	if (GIMME_V != G_VOID)
		1727	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1728
		1729	req = SvAIO_REQ (ST (i));
		1730
		1731	if (req)
		1732	eio_grp_add (grp, req);
		1733	}
		1734	}
		1735
		1736	void
		1737	cancel_subs (aio_req_ornot req)
		1738	CODE:
		1739	req_cancel_subs (req);
		1740
		1741	void
		1742	result (aio_req grp, ...)
		1743	CODE:
		1744	{
		1745	int i;
		1746	AV *av;
		1747
		1748	grp->errorno = errno;
		1749
		1750	av = newAV ();
		1751	av_extend (av, items - 1);
		1752
		1753	for (i = 1; i < items; ++i )
		1754	av_push (av, newSVsv (ST (i)));
		1755
		1756	SvREFCNT_dec (grp->sv1);
		1757	grp->sv1 = (SV *)av;
		1758	}
		1759
		1760	void
		1761	errno (aio_req grp, int errorno = errno)
		1762	CODE:
		1763	grp->errorno = errorno;
		1764
		1765	void
		1766	limit (aio_req grp, int limit)
		1767	CODE:
		1768	eio_grp_limit (grp, limit);
		1769
		1770	void
		1771	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1772	CODE:
		1773	{
		1774	SvREFCNT_dec (grp->sv2);
		1775	grp->sv2 = newSVsv (callback);
		1776	grp->feed = aio_grp_feed;
		1777
		1778	if (grp->int2 <= 0)
		1779	grp->int2 = 2;
		1780
		1781	eio_grp_limit (grp, grp->int2);
		1782	}
		1783

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