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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 1.200 by root, Thu Sep 29 09:51:24 2011 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
10	#include <unistd.h>	16	#include <limits.h>
11	#include <fcntl.h>	17	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	18	#include <sched.h>
14	#if __linux	19
		20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
15	#include <sys/syscall.h>	21	# include <sys/mman.h>
16	#endif	22	#endif
17		23
18	#include <pthread.h>	24	/* perl namespace pollution */
		25	#undef VERSION
19		26
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	27	/* perl stupidly overrides readdir and maybe others */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	28	/* with thread-unsafe versions, imagine that :( */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	29	#undef readdir
		30	#undef opendir
		31	#undef closedir
23		32
24	#if __ia64	33	#ifdef _WIN32
25	# define STACKSIZE 65536	34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
26	#else	67	#else
27	# define STACKSIZE 4096	68
		69	#include <sys/time.h>
		70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
		295	# else
		296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		297	# endif
		298	#endif
		299	#ifndef MAP_HUGETLB
		300	# define MAP_HUGETLB 0
		301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
		304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
		314
		315	#ifndef makedev
		316	# define makedev(maj,min) (((maj) << 8) | (min))
		317	#endif
		318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
		324
		325	#ifndef PAGESIZE
		326	# define PAGESIZE sysconf (_SC_PAGESIZE)
28	#endif	327	#endif
29		328
30	enum {	329	enum {
31	REQ_QUIT,	330	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	};	331	};
37		332
38	typedef struct aio_cb {
39	struct aio_cb *volatile next;
40
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;	333	typedef eio_req *aio_req;
		334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd aio_wd;
57		336
58	static int started;	337	static SV *on_next_submit;
59	static volatile int nreqs;	338	static int next_pri = EIO_PRI_DEFAULT;
60	static int max_outstanding = 1<<30;	339	static int max_outstanding;
61	static int respipe [2];
62		340
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	341	static s_epipe respipe;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		342
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	343	static void req_destroy (aio_req req);
68	static volatile aio_req ress, rese; /* queue start, queue end */	344	static void req_cancel (aio_req req);
69		345
70	static void	346	static void want_poll (void)
71	poll_wait ()
72	{	347	{
73	if (nreqs && !ress)	348	/* write a dummy byte to the pipe so fh becomes ready */
		349	s_epipe_signal (&respipe);
		350	}
		351
		352	static void done_poll (void)
		353	{
		354	/* read any signals sent by the worker threads */
		355	s_epipe_drain (&respipe);
		356	}
		357
		358	/* must be called at most once */
		359	static SV *req_sv (aio_req req, HV *stash)
		360	{
		361	if (!req->self)
74	{	362	{
75	fd_set rfd;	363	req->self = (SV *)newHV ();
76	FD_ZERO(&rfd);	364	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	}	365	}
81	}
82		366
83	static int	367	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
84	poll_cb ()	368	}
85	{
86	dSP;
87	int count = 0;
88	aio_req req, prv;
89		369
90	static int rl;//D	370	static SV *
91	//printf ("%d ENTER\n", ++rl);//D	371	newSVaio_wd (aio_wd wd)
		372	{
		373	return sv_bless (newRV_noinc (newSViv ((long)wd)), aio_wd_stash);
		374	}
92		375
93	pthread_mutex_lock (&reslock);	376	static aio_req SvAIO_REQ (SV *sv)
		377	{
		378	MAGIC *mg;
94		379
95	{	380	if (!SvROK (sv)
96	/* read any signals sent by the worker threads */	381	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
97	char buf [32];	382	&& SvSTASH (SvRV (sv)) != aio_req_stash
98	while (read (respipe [0], buf, 32) > 0)	383	&& !sv_derived_from (sv, "IO::AIO::REQ")))
99	;	384	croak ("object of class IO::AIO::REQ expected");
100	}
101		385
102	req = ress;	386	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
103	ress = rese = 0;
104		387
105	pthread_mutex_unlock (&reslock);	388	return mg ? (aio_req)mg->mg_ptr : 0;
		389	}
106		390
107	while (req)	391	static aio_wd SvAIO_WD (SV *sv)
		392	{
		393	if (!SvROK (sv)
		394	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		395	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		396	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		397
		398	return (aio_wd)(long)SvIVX (SvRV (sv));
		399	}
		400
		401	static void aio_grp_feed (aio_req grp)
		402	{
		403	if (grp->sv2 && SvOK (grp->sv2))
108	{	404	{
109	nreqs--;	405	dSP;
110	//printf ("%d count %d %p->%p\n", rl, count, req, req->next);//D
111		406
112	if (req->type == REQ_QUIT)	407	ENTER;
113	started--;	408	SAVETMPS;
114	else	409	PUSHMARK (SP);
		410	XPUSHs (req_sv (grp, aio_grp_stash));
		411	PUTBACK;
		412	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		413	SPAGAIN;
		414	FREETMPS;
		415	LEAVE;
		416	}
		417	}
		418
		419	static void req_submit (eio_req *req)
		420	{
		421	eio_submit (req);
		422
		423	if (expect_false (on_next_submit))
		424	{
		425	dSP;
		426	SV *cb = sv_2mortal (on_next_submit);
		427
		428	on_next_submit = 0;
		429
		430	PUSHMARK (SP);
		431	PUTBACK;
		432	call_sv (cb, G_DISCARD | G_EVAL);
		433	}
		434	}
		435
		436	static int req_invoke (eio_req *req)
		437	{
		438	if (req->flags & FLAG_SV2_RO_OFF)
		439	SvREADONLY_off (req->sv2);
		440
		441	if (!EIO_CANCELLED (req) && req->callback)
		442	{
		443	dSP;
		444	static SV *sv_result_cache; /* caches the result integer SV */
		445	SV *sv_result;
		446
		447	ENTER;
		448	SAVETMPS;
		449	PUSHMARK (SP);
		450	EXTEND (SP, 1);
		451
		452	/* do not recreate the result IV from scratch each time */
		453	if (expect_true (sv_result_cache))
115	{	454	{
116	int errorno = errno;	455	sv_result = sv_result_cache; sv_result_cache = 0;
117	errno = req->errorno;	456	SvIV_set (sv_result, req->result);
118		457	SvIOK_only (sv_result);
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	}	458	}
357	else	459	else
358	{	460	{
359	rese = ress = req;	461	sv_result = newSViv (req->result);
360		462	SvREADONLY_on (sv_result);
361	/* write a dummy byte to the pipe so fh becomes ready */
362	write (respipe [1], &respipe, 1);
363	}	463	}
364		464
365	pthread_mutex_unlock (&reslock);	465	switch (req->type)
		466	{
		467	case EIO_WD_OPEN:
		468	PUSHs (sv_2mortal (newSVaio_wd (req->wd)));
		469	break;
		470
		471	case EIO_READDIR:
		472	{
		473	SV *rv = &PL_sv_undef;
		474
		475	if (req->result >= 0)
		476	{
		477	int i;
		478	char *names = (char *)req->ptr2;
		479	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		480	AV *av = newAV ();
		481
		482	av_extend (av, req->result - 1);
		483
		484	for (i = 0; i < req->result; ++i)
		485	{
		486	if (req->int1 & EIO_READDIR_DENTS)
		487	{
		488	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		489
		490	if (req->int1 & EIO_READDIR_CUSTOM2)
		491	{
		492	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		493	AV *avent = newAV ();
		494
		495	av_extend (avent, 2);
		496
		497	if (!sv_type [ent->type])
		498	{
		499	sv_type [ent->type] = newSViv (ent->type);
		500	SvREADONLY_on (sv_type [ent->type]);
		501	}
		502
		503	av_store (avent, 0, namesv);
		504	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		505	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		506
		507	av_store (av, i, newRV_noinc ((SV *)avent));
		508	}
		509	else
		510	av_store (av, i, namesv);
		511
		512	++ent;
		513	}
		514	else
		515	{
		516	SV *name = newSVpv (names, 0);
		517	av_store (av, i, name);
		518	names += SvCUR (name) + 1;
		519	}
		520	}
		521
		522	rv = sv_2mortal (newRV_noinc ((SV *)av));
		523	}
		524
		525	PUSHs (rv);
		526
		527	if (req->int1 & EIO_READDIR_CUSTOM1)
		528	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		529	}
		530	break;
		531
		532	case EIO_OPEN:
		533	{
		534	/* convert fd to fh */
		535	SV *fh = &PL_sv_undef;
		536
		537	if (req->result >= 0)
		538	{
		539	GV *gv = (GV *)sv_newmortal ();
		540	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		541	char sym [64];
		542	int symlen;
		543
		544	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		545	gv_init (gv, aio_stash, sym, symlen, 0);
		546
		547	symlen = snprintf (
		548	sym,
		549	sizeof (sym),
		550	"%s&=%d",
		551	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		552	(int)req->result
		553	);
		554
		555	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		556	fh = (SV *)gv;
		557	}
		558
		559	PUSHs (fh);
		560	}
		561	break;
		562
		563	case EIO_STATVFS:
		564	case EIO_FSTATVFS:
		565	{
		566	SV *rv = &PL_sv_undef;
		567
		568	#ifndef _WIN32
		569	if (req->result >= 0)
		570	{
		571	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		572	HV *hv = newHV ();
		573
		574	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		575
		576	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		577	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		578	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		579	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		580	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		581	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		582	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		583	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		584	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		585	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		586	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		587	}
		588	#endif
		589
		590	PUSHs (rv);
		591	}
		592
		593	break;
		594
		595	case EIO_GROUP:
		596	req->int1 = 2; /* mark group as finished */
		597
		598	if (req->sv1)
		599	{
		600	int i;
		601	AV *av = (AV *)req->sv1;
		602
		603	EXTEND (SP, AvFILL (av) + 1);
		604	for (i = 0; i <= AvFILL (av); ++i)
		605	PUSHs (*av_fetch (av, i, 0));
		606	}
		607	break;
		608
		609	case EIO_NOP:
		610	case EIO_BUSY:
		611	break;
		612
		613	case EIO_READLINK:
		614	case EIO_REALPATH:
		615	if (req->result > 0)
		616	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		617	break;
		618
		619	case EIO_STAT:
		620	case EIO_LSTAT:
		621	case EIO_FSTAT:
		622	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		623
		624	if (!(PL_laststatval = req->result))
		625	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		626	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		627
		628	PUSHs (sv_result);
		629	break;
		630
		631	case EIO_READ:
		632	{
		633	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		634	*SvEND (req->sv2) = 0;
		635	SvPOK_only (req->sv2);
		636	SvSETMAGIC (req->sv2);
		637	PUSHs (sv_result);
		638	}
		639	break;
		640
		641	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		642	if (req->result > 0)
		643	SvIV_set (sv_result, 0);
		644	/* FALLTHROUGH */
		645
		646	default:
		647	PUSHs (sv_result);
		648	break;
		649	}
		650
		651	errno = req->errorno;
		652
		653	PUTBACK;
		654	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		655	SPAGAIN;
		656
		657	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		658	SvREFCNT_dec (sv_result);
		659	else
		660	sv_result_cache = sv_result;
		661
		662	FREETMPS;
		663	LEAVE;
		664
		665	PUTBACK;
366	}	666	}
367	while (type != REQ_QUIT);	667
		668	return !!SvTRUE (ERRSV);
		669	}
		670
		671	static void req_destroy (aio_req req)
		672	{
		673	if (req->self)
		674	{
		675	sv_unmagic (req->self, PERL_MAGIC_ext);
		676	SvREFCNT_dec (req->self);
		677	}
		678
		679	SvREFCNT_dec (req->sv1);
		680	SvREFCNT_dec (req->sv2);
		681	SvREFCNT_dec (req->sv3);
		682	SvREFCNT_dec (req->sv4);
		683	SvREFCNT_dec (req->callback);
		684
		685	Safefree (req);
		686	}
		687
		688	static void req_cancel_subs (aio_req grp)
		689	{
		690	if (grp->type != EIO_GROUP)
		691	return;
		692
		693	SvREFCNT_dec (grp->sv2);
		694	grp->sv2 = 0;
		695
		696	eio_grp_cancel (grp);
		697	}
		698
		699	static void create_respipe (void)
		700	{
		701	if (s_epipe_renew (&respipe))
		702	croak ("IO::AIO: unable to initialize result pipe");
		703	}
		704
		705	static void poll_wait (void)
		706	{
		707	while (eio_nreqs ())
		708	{
		709	int size;
		710
		711	X_LOCK (reslock);
		712	size = res_queue.size;
		713	X_UNLOCK (reslock);
		714
		715	if (size)
		716	return;
		717
		718	etp_maybe_start_thread ();
		719
		720	s_epipe_wait (&respipe);
		721	}
		722	}
		723
		724	static int poll_cb (void)
		725	{
		726	for (;;)
		727	{
		728	int res = eio_poll ();
		729
		730	if (res > 0)
		731	croak (0);
		732
		733	if (!max_outstanding || max_outstanding > eio_nreqs ())
		734	return res;
		735
		736	poll_wait ();
		737	}
		738	}
		739
		740	static void ecb_cold
		741	reinit (void)
		742	{
		743	create_respipe ();
		744
		745	if (eio_init (want_poll, done_poll) < 0)
		746	croak ("IO::AIO: unable to initialise eio library");
		747	}
		748
		749	/*****************************************************************************/
		750
		751	#if !_POSIX_MAPPED_FILES
		752	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		753	# define munmap(addr,length) (errno = ENOSYS, -1)
		754	#endif
		755
		756	#if !_POSIX_MEMORY_PROTECTION
		757	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		758	# define PROT_NONE 0
		759	# define PROT_WRITE 0
		760	# define MAP_PRIVATE 0
		761	# define MAP_SHARED 0
		762	# define MAP_FIXED 0
		763	#endif
		764
		765	#define MMAP_MAGIC PERL_MAGIC_ext
		766
		767	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		768	{
		769	int old_errno = errno;
		770	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		771	errno = old_errno;
		772
		773	mg->mg_obj = 0; /* just in case */
		774
		775	SvREADONLY_off (sv);
		776
		777	if (SvPVX (sv) != mg->mg_ptr)
		778	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		779
		780	SvCUR_set (sv, 0);
		781	SvPVX (sv) = 0;
		782	SvOK_off (sv);
368		783
369	return 0;	784	return 0;
370	}	785	}
371		786
		787	static MGVTBL mmap_vtbl = {
		788	0, 0, 0, 0, mmap_free
		789	};
		790
		791	/*****************************************************************************/
		792
		793	static SV * get_cb (SV *cb_sv)
		794	{
		795	SvGETMAGIC (cb_sv);
		796	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		797	}
		798
		799	#define dREQ \
		800	SV *cb_cv; \
		801	aio_req req; \
		802	int req_pri = next_pri; \
		803	next_pri = EIO_PRI_DEFAULT; \
		804	\
		805	cb_cv = get_cb (callback); \
		806	\
		807	Newz (0, req, 1, eio_req); \
		808	if (!req) \
		809	croak ("out of memory during eio_req allocation"); \
		810	\
		811	req->callback = SvREFCNT_inc (cb_cv); \
		812	req->pri = req_pri
		813
		814	#define REQ_SEND \
		815	PUTBACK; \
		816	req_submit (req); \
		817	SPAGAIN; \
		818	\
		819	if (GIMME_V != G_VOID) \
		820	XPUSHs (req_sv (req, aio_req_stash));
		821
		822	static void
		823	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		824	{
		825	if (expect_false (SvROK (path)))
		826	{
		827	AV *av = (AV *)SvRV (path);
		828	SV *wdob;
		829
		830	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		831	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		832
		833	path = AvARRAY (av)[1];
		834	wdob = AvARRAY (av)[0];
		835
		836	if (SvOK (wdob))
		837	{
		838	*wd = SvAIO_WD (wdob);
		839	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		840	}
		841	else
		842	*wd = EIO_INVALID_WD;
		843	}
		844
		845	*pathsv = newSVsv (path);
		846	*ptr = SvPVbyte_nolen (*pathsv);
		847	}
		848
		849	static void
		850	req_set_path1 (aio_req req, SV *path)
		851	{
		852	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		853	}
		854
		855	static void
		856	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		857	{
		858	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		859
		860	switch (SvTYPE (rv))
		861	{
		862	case SVt_PVIO:
		863	case SVt_PVLV:
		864	case SVt_PVGV:
		865	req->type = type_fh;
		866	req->sv1 = newSVsv (fh_or_path);
		867	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		868	break;
		869
		870	default:
		871	req->type = type_path;
		872	req_set_path1 (req, fh_or_path);
		873	break;
		874	}
		875
		876	}
		877
372	MODULE = IO::AIO PACKAGE = IO::AIO	878	MODULE = IO::AIO PACKAGE = IO::AIO
373		879
374	PROTOTYPES: ENABLE	880	PROTOTYPES: ENABLE
375		881
376	BOOT:	882	BOOT:
377	{	883	{
378	if (pipe (respipe))	884	static const struct {
379	croak ("unable to initialize result pipe");	885	const char *name;
		886	IV iv;
		887	} *civ, const_iv[] = {
		888	# define const_niv(name, value) { # name, (IV) value },
		889	# define const_iv(name) { # name, (IV) name },
		890	# define const_eio(name) { # name, (IV) EIO_ ## name },
		891	const_iv (EXDEV)
		892	const_iv (ENOSYS)
		893	const_iv (O_RDONLY)
		894	const_iv (O_WRONLY)
		895	const_iv (O_RDWR)
		896	const_iv (O_CREAT)
		897	const_iv (O_TRUNC)
		898	const_iv (O_EXCL)
		899	const_iv (O_APPEND)
380		900
381	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	901	const_iv (O_ASYNC)
382	croak ("cannot set result pipe to nonblocking mode");	902	const_iv (O_DIRECT)
		903	const_iv (O_NOATIME)
383		904
384	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	905	const_iv (O_CLOEXEC)
385	croak ("cannot set result pipe to nonblocking mode");	906	const_iv (O_NOCTTY)
386	}	907	const_iv (O_NOFOLLOW)
		908	const_iv (O_NONBLOCK)
		909	const_iv (O_EXEC)
		910	const_iv (O_SEARCH)
		911	const_iv (O_DIRECTORY)
		912	const_iv (O_DSYNC)
		913	const_iv (O_RSYNC)
		914	const_iv (O_SYNC)
		915	const_iv (O_TTY_INIT)
387		916
		917	const_iv (S_IFIFO)
		918	const_iv (S_IFCHR)
		919	const_iv (S_IFBLK)
		920	const_iv (S_IFLNK)
		921	const_iv (S_IFREG)
		922	const_iv (S_IFDIR)
		923	const_iv (S_IFWHT)
		924	const_iv (S_IFSOCK)
		925	const_iv (S_IFMT)
		926
		927	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		928	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		929	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		930	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		931	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		932	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		933
		934	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		935	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		936	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		937	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		938	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		939
		940	const_iv (ST_RDONLY)
		941	const_iv (ST_NOSUID)
		942	const_iv (ST_NODEV)
		943	const_iv (ST_NOEXEC)
		944	const_iv (ST_SYNCHRONOUS)
		945	const_iv (ST_MANDLOCK)
		946	const_iv (ST_WRITE)
		947	const_iv (ST_APPEND)
		948	const_iv (ST_IMMUTABLE)
		949	const_iv (ST_NOATIME)
		950	const_iv (ST_NODIRATIME)
		951	const_iv (ST_RELATIME)
		952
		953	const_iv (PROT_NONE)
		954	const_iv (PROT_EXEC)
		955	const_iv (PROT_READ)
		956	const_iv (PROT_WRITE)
		957
		958	/*const_iv (MAP_FIXED)*/
		959	const_iv (MAP_PRIVATE)
		960	const_iv (MAP_SHARED)
		961	const_iv (MAP_ANONYMOUS)
		962
		963	/* linuxish */
		964	const_iv (MAP_HUGETLB)
		965	const_iv (MAP_LOCKED)
		966	const_iv (MAP_NORESERVE)
		967	const_iv (MAP_POPULATE)
		968	const_iv (MAP_NONBLOCK)
		969
		970	const_eio (MCL_FUTURE)
		971	const_eio (MCL_CURRENT)
		972
		973	const_eio (MS_ASYNC)
		974	const_eio (MS_INVALIDATE)
		975	const_eio (MS_SYNC)
		976
		977	const_eio (MT_MODIFY)
		978
		979	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		980	const_eio (SYNC_FILE_RANGE_WRITE)
		981	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		982
		983	const_eio (FALLOC_FL_KEEP_SIZE)
		984
		985	const_eio (READDIR_DENTS)
		986	const_eio (READDIR_DIRS_FIRST)
		987	const_eio (READDIR_STAT_ORDER)
		988	const_eio (READDIR_FOUND_UNKNOWN)
		989
		990	const_eio (DT_UNKNOWN)
		991	const_eio (DT_FIFO)
		992	const_eio (DT_CHR)
		993	const_eio (DT_DIR)
		994	const_eio (DT_BLK)
		995	const_eio (DT_REG)
		996	const_eio (DT_LNK)
		997	const_eio (DT_SOCK)
		998	const_eio (DT_WHT)
		999	};
		1000
		1001	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1002	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1003	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1004	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1005
		1006	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1007	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1008
		1009	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1010
		1011	reinit ();
		1012	}
		1013
388	void	1014	void
389	min_parallel(nthreads)	1015	reinit ()
390	int nthreads	1016	PROTOTYPE:
		1017
		1018	void
		1019	max_poll_reqs (unsigned int nreqs)
391	PROTOTYPE: $	1020	PROTOTYPE: $
392	CODE:	1021	CODE:
393	while (nthreads > started)	1022	eio_set_max_poll_reqs (nreqs);
394	start_thread ();
395		1023
396	void	1024	void
397	max_parallel(nthreads)	1025	max_poll_time (double nseconds)
398	int nthreads
399	PROTOTYPE: $	1026	PROTOTYPE: $
400	CODE:	1027	CODE:
		1028	eio_set_max_poll_time (nseconds);
		1029
		1030	void
		1031	min_parallel (unsigned int nthreads)
		1032	PROTOTYPE: $
		1033	CODE:
		1034	eio_set_min_parallel (nthreads);
		1035
		1036	void
		1037	max_parallel (unsigned int nthreads)
		1038	PROTOTYPE: $
		1039	CODE:
		1040	eio_set_max_parallel (nthreads);
		1041
		1042	void
		1043	max_idle (unsigned int nthreads)
		1044	PROTOTYPE: $
		1045	CODE:
		1046	eio_set_max_idle (nthreads);
		1047
		1048	void
		1049	idle_timeout (unsigned int seconds)
		1050	PROTOTYPE: $
		1051	CODE:
		1052	eio_set_idle_timeout (seconds);
		1053
		1054	void
		1055	max_outstanding (unsigned int maxreqs)
		1056	PROTOTYPE: $
		1057	CODE:
		1058	max_outstanding = maxreqs;
		1059
		1060	void
		1061	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1062	PPCODE:
401	{	1063	{
402	int cur = started;	1064	dREQ;
403	while (cur > nthreads)	1065
404	{	1066	req->type = EIO_WD_OPEN;
405	end_thread ();	1067	req_set_path1 (req, pathname);
		1068
		1069	REQ_SEND;
		1070	}
		1071
		1072	void
		1073	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1074	PPCODE:
		1075	{
		1076	dREQ;
		1077
		1078	req->type = EIO_OPEN;
		1079	req_set_path1 (req, pathname);
		1080	req->int1 = flags;
		1081	req->int2 = mode;
		1082
		1083	REQ_SEND;
		1084	}
		1085
		1086	void
		1087	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1088	ALIAS:
		1089	aio_fsync = EIO_FSYNC
		1090	aio_fdatasync = EIO_FDATASYNC
		1091	aio_syncfs = EIO_SYNCFS
		1092	PPCODE:
		1093	{
		1094	int fd = s_fileno_croak (fh, 0);
		1095	dREQ;
		1096
		1097	req->type = ix;
		1098	req->sv1 = newSVsv (fh);
		1099	req->int1 = fd;
		1100
		1101	REQ_SEND (req);
		1102	}
		1103
		1104	void
		1105	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1106	PPCODE:
		1107	{
		1108	int fd = s_fileno_croak (fh, 0);
		1109	dREQ;
		1110
		1111	req->type = EIO_SYNC_FILE_RANGE;
		1112	req->sv1 = newSVsv (fh);
		1113	req->int1 = fd;
		1114	req->offs = offset;
		1115	req->size = nbytes;
		1116	req->int2 = flags;
		1117
		1118	REQ_SEND (req);
		1119	}
		1120
		1121	void
		1122	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1123	PPCODE:
		1124	{
		1125	int fd = s_fileno_croak (fh, 0);
		1126	dREQ;
		1127
		1128	req->type = EIO_FALLOCATE;
		1129	req->sv1 = newSVsv (fh);
		1130	req->int1 = fd;
		1131	req->int2 = mode;
		1132	req->offs = offset;
		1133	req->size = len;
		1134
		1135	REQ_SEND (req);
		1136	}
		1137
		1138	void
		1139	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1140	PPCODE:
		1141	{
		1142	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1143	int fd = s_fileno_croak (fh, 0);
		1144	dREQ;
		1145
		1146	if (expect_false (close_fd < 0))
		1147	{
		1148	int pipefd [2];
		1149
		1150	if (
		1151	#ifdef _WIN32
		1152	_pipe (pipefd, 1, _O_BINARY) < 0
		1153	#else
		1154	pipe (pipefd) < 0
		1155	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1156	#endif
		1157	|| close (pipefd [1]) < 0
406	cur--;	1158	)
		1159	abort (); /*D*/
		1160
		1161	close_fd = pipefd [0];
407	}	1162	}
408		1163
409	while (started > nthreads)	1164	req->type = EIO_DUP2;
		1165	req->int1 = close_fd;
		1166	req->sv2 = newSVsv (fh);
		1167	req->int2 = fd;
		1168
		1169	REQ_SEND (req);
		1170	}
		1171
		1172	void
		1173	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1174	ALIAS:
		1175	aio_read = EIO_READ
		1176	aio_write = EIO_WRITE
		1177	PPCODE:
		1178	{
		1179	STRLEN svlen;
		1180	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1181	char *svptr = SvPVbyte (data, svlen);
		1182	UV len = SvUV (length);
		1183
		1184	if (dataoffset < 0)
		1185	dataoffset += svlen;
		1186
		1187	if (dataoffset < 0 || dataoffset > svlen)
		1188	croak ("dataoffset outside of data scalar");
		1189
		1190	if (ix == EIO_WRITE)
		1191	{
		1192	/* write: check length and adjust. */
		1193	if (!SvOK (length) || len + dataoffset > svlen)
		1194	len = svlen - dataoffset;
		1195	}
		1196	else
		1197	{
		1198	/* read: check type and grow scalar as necessary */
		1199	SvUPGRADE (data, SVt_PV);
		1200	svptr = SvGROW (data, len + dataoffset + 1);
		1201	}
		1202
		1203	{
		1204	dREQ;
		1205
		1206	req->type = ix;
		1207	req->sv1 = newSVsv (fh);
		1208	req->int1 = fd;
		1209	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1210	req->size = len;
		1211	req->sv2 = SvREFCNT_inc (data);
		1212	req->ptr2 = (char *)svptr + dataoffset;
		1213	req->stroffset = dataoffset;
		1214
		1215	if (!SvREADONLY (data))
		1216	{
		1217	SvREADONLY_on (data);
		1218	req->flags |= FLAG_SV2_RO_OFF;
		1219	}
		1220
		1221	REQ_SEND;
		1222	}
		1223	}
		1224
		1225	void
		1226	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1227	ALIAS:
		1228	aio_readlink = EIO_READLINK
		1229	aio_realpath = EIO_REALPATH
		1230	PPCODE:
		1231	{
		1232	dREQ;
		1233
		1234	req->type = ix;
		1235	req_set_path1 (req, pathname);
		1236
		1237	REQ_SEND;
		1238	}
		1239
		1240	void
		1241	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1242	PPCODE:
		1243	{
		1244	int ifd = s_fileno_croak (in_fh , 0);
		1245	int ofd = s_fileno_croak (out_fh, 1);
		1246	dREQ;
		1247
		1248	req->type = EIO_SENDFILE;
		1249	req->sv1 = newSVsv (out_fh);
		1250	req->int1 = ofd;
		1251	req->sv2 = newSVsv (in_fh);
		1252	req->int2 = ifd;
		1253	req->offs = in_offset;
		1254	req->size = length;
		1255
		1256	REQ_SEND;
		1257	}
		1258
		1259	void
		1260	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1261	PPCODE:
		1262	{
		1263	int fd = s_fileno_croak (fh, 0);
		1264	dREQ;
		1265
		1266	req->type = EIO_READAHEAD;
		1267	req->sv1 = newSVsv (fh);
		1268	req->int1 = fd;
		1269	req->offs = offset;
		1270	req->size = length;
		1271
		1272	REQ_SEND;
		1273	}
		1274
		1275	void
		1276	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1277	ALIAS:
		1278	aio_stat = EIO_STAT
		1279	aio_lstat = EIO_LSTAT
		1280	aio_statvfs = EIO_STATVFS
		1281	PPCODE:
		1282	{
		1283	dREQ;
		1284
		1285	req->sv1 = newSVsv (fh_or_path);
		1286	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1287	REQ_SEND;
		1288	}
		1289
		1290	UV
		1291	major (UV dev)
		1292	ALIAS:
		1293	minor = 1
		1294	CODE:
		1295	RETVAL = ix ? major (dev) : minor (dev);
		1296	OUTPUT:
		1297	RETVAL
		1298
		1299	UV
		1300	makedev (UV maj, UV min)
		1301	CODE:
		1302	RETVAL = makedev (maj, min);
		1303	OUTPUT:
		1304	RETVAL
		1305
		1306	void
		1307	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1308	PPCODE:
		1309	{
		1310	dREQ;
		1311
		1312	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1313	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1314	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1315
		1316	REQ_SEND;
		1317	}
		1318
		1319	void
		1320	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1321	PPCODE:
		1322	{
		1323	dREQ;
		1324
		1325	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1326	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1327
		1328	REQ_SEND;
		1329	}
		1330
		1331	void
		1332	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1333	PPCODE:
		1334	{
		1335	dREQ;
		1336
		1337	req->int2 = mode;
		1338	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1339
		1340	REQ_SEND;
		1341	}
		1342
		1343	void
		1344	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1345	PPCODE:
		1346	{
		1347	dREQ;
		1348
		1349	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1350	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1351	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1352
		1353	REQ_SEND;
		1354	}
		1355
		1356	void
		1357	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1358	PPCODE:
		1359	{
		1360	dREQ;
		1361
		1362	req->type = EIO_READDIR;
		1363	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1364
		1365	if (flags & EIO_READDIR_DENTS)
		1366	req->int1 |= EIO_READDIR_CUSTOM2;
		1367
		1368	req_set_path1 (req, pathname);
		1369
		1370	REQ_SEND;
		1371	}
		1372
		1373	void
		1374	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1375	PPCODE:
		1376	{
		1377	dREQ;
		1378
		1379	req->type = EIO_MKDIR;
		1380	req->int2 = mode;
		1381	req_set_path1 (req, pathname);
		1382
		1383	REQ_SEND;
		1384	}
		1385
		1386	void
		1387	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1388	ALIAS:
		1389	aio_unlink = EIO_UNLINK
		1390	aio_rmdir = EIO_RMDIR
		1391	aio_readdir = EIO_READDIR
		1392	PPCODE:
		1393	{
		1394	dREQ;
		1395
		1396	req->type = ix;
		1397	req_set_path1 (req, pathname);
		1398
		1399	REQ_SEND;
		1400	}
		1401
		1402	void
		1403	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1404	ALIAS:
		1405	aio_link = EIO_LINK
		1406	aio_symlink = EIO_SYMLINK
		1407	aio_rename = EIO_RENAME
		1408	PPCODE:
		1409	{
		1410	dREQ;
		1411	eio_wd wd2 = 0;
		1412
		1413	req->type = ix;
		1414	req_set_path1 (req, oldpath);
		1415	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1416	req->int3 = (long)wd2;
		1417
		1418	REQ_SEND;
		1419	}
		1420
		1421	void
		1422	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1423	PPCODE:
		1424	{
		1425	dREQ;
		1426
		1427	req->type = EIO_MKNOD;
		1428	req->int2 = (mode_t)mode;
		1429	req->offs = dev;
		1430	req_set_path1 (req, pathname);
		1431
		1432	REQ_SEND;
		1433	}
		1434
		1435	void
		1436	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1437	ALIAS:
		1438	aio_mtouch = EIO_MTOUCH
		1439	aio_msync = EIO_MSYNC
		1440	PPCODE:
		1441	{
		1442	STRLEN svlen;
		1443	char *svptr = SvPVbyte (data, svlen);
		1444	UV len = SvUV (length);
		1445
		1446	if (offset < 0)
		1447	offset += svlen;
		1448
		1449	if (offset < 0 || offset > svlen)
		1450	croak ("offset outside of scalar");
		1451
		1452	if (!SvOK (length) || len + offset > svlen)
		1453	len = svlen - offset;
		1454
		1455	{
		1456	dREQ;
		1457
		1458	req->type = ix;
		1459	req->sv2 = SvREFCNT_inc (data);
		1460	req->ptr2 = (char *)svptr + offset;
		1461	req->size = len;
		1462	req->int1 = flags;
		1463
		1464	REQ_SEND;
		1465	}
		1466	}
		1467
		1468	void
		1469	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1470	PPCODE:
		1471	{
		1472	STRLEN svlen;
		1473	char *svptr = SvPVbyte (data, svlen);
		1474	UV len = SvUV (length);
		1475
		1476	if (offset < 0)
		1477	offset += svlen;
		1478
		1479	if (offset < 0 || offset > svlen)
		1480	croak ("offset outside of scalar");
		1481
		1482	if (!SvOK (length) || len + offset > svlen)
		1483	len = svlen - offset;
		1484
		1485	{
		1486	dREQ;
		1487
		1488	req->type = EIO_MLOCK;
		1489	req->sv2 = SvREFCNT_inc (data);
		1490	req->ptr2 = (char *)svptr + offset;
		1491	req->size = len;
		1492
		1493	REQ_SEND;
		1494	}
		1495	}
		1496
		1497	void
		1498	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1499	PPCODE:
		1500	{
		1501	dREQ;
		1502
		1503	req->type = EIO_MLOCKALL;
		1504	req->int1 = flags;
		1505
		1506	REQ_SEND;
		1507	}
		1508
		1509	void
		1510	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1511	PPCODE:
		1512	{
		1513	dREQ;
		1514
		1515	req->type = EIO_BUSY;
		1516	req->nv1 = delay < 0. ? 0. : delay;
		1517
		1518	REQ_SEND;
		1519	}
		1520
		1521	void
		1522	aio_group (SV *callback=&PL_sv_undef)
		1523	PPCODE:
		1524	{
		1525	dREQ;
		1526
		1527	req->type = EIO_GROUP;
		1528
		1529	req_submit (req);
		1530	XPUSHs (req_sv (req, aio_grp_stash));
		1531	}
		1532
		1533	void
		1534	aio_nop (SV *callback=&PL_sv_undef)
		1535	ALIAS:
		1536	aio_nop = EIO_NOP
		1537	aio_sync = EIO_SYNC
		1538	PPCODE:
		1539	{
		1540	dREQ;
		1541
		1542	req->type = ix;
		1543
		1544	REQ_SEND;
		1545	}
		1546
		1547	int
		1548	aioreq_pri (int pri = 0)
		1549	CODE:
		1550	RETVAL = next_pri;
		1551	if (items > 0)
		1552	{
		1553	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1554	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1555	next_pri = pri;
		1556	}
		1557	OUTPUT:
		1558	RETVAL
		1559
		1560	void
		1561	aioreq_nice (int nice = 0)
		1562	CODE:
		1563	nice = next_pri - nice;
		1564	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1565	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1566	next_pri = nice;
		1567
		1568	void
		1569	flush ()
		1570	CODE:
		1571	while (eio_nreqs ())
410	{	1572	{
411	poll_wait ();	1573	poll_wait ();
412	poll_cb ();	1574	poll_cb ();
413	}	1575	}
414	}
415		1576
416	int	1577	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()	1578	poll ()
598	PROTOTYPE:
599	CODE:	1579	CODE:
600	if (nreqs)
601	{
602	poll_wait ();	1580	poll_wait ();
603	poll_cb ();
604	}
605
606	int
607	poll_fileno()
608	PROTOTYPE:
609	CODE:
610	RETVAL = respipe [0];
611	OUTPUT:
612	RETVAL
613
614	int
615	poll_cb(...)
616	PROTOTYPE:
617	CODE:
618	RETVAL = poll_cb ();	1581	RETVAL = poll_cb ();
619	OUTPUT:	1582	OUTPUT:
620	RETVAL	1583	RETVAL
621		1584
622	void
623	poll_wait()
624	PROTOTYPE:
625	CODE:
626	if (nreqs)
627	poll_wait ();
628
629	int	1585	int
630	nreqs()	1586	poll_fileno ()
631	PROTOTYPE:
632	CODE:	1587	CODE:
633	RETVAL = nreqs;	1588	RETVAL = s_epipe_fd (&respipe);
634	OUTPUT:	1589	OUTPUT:
635	RETVAL	1590	RETVAL
636		1591
		1592	int
		1593	poll_cb (...)
		1594	PROTOTYPE:
		1595	CODE:
		1596	RETVAL = poll_cb ();
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	void
		1601	poll_wait ()
		1602	CODE:
		1603	poll_wait ();
		1604
		1605	int
		1606	nreqs ()
		1607	CODE:
		1608	RETVAL = eio_nreqs ();
		1609	OUTPUT:
		1610	RETVAL
		1611
		1612	int
		1613	nready ()
		1614	CODE:
		1615	RETVAL = eio_nready ();
		1616	OUTPUT:
		1617	RETVAL
		1618
		1619	int
		1620	npending ()
		1621	CODE:
		1622	RETVAL = eio_npending ();
		1623	OUTPUT:
		1624	RETVAL
		1625
		1626	int
		1627	nthreads ()
		1628	CODE:
		1629	RETVAL = eio_nthreads ();
		1630	OUTPUT:
		1631	RETVAL
		1632
		1633	int
		1634	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1635	CODE:
		1636	RETVAL = posix_fadvise (fh, offset, length, advice);
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	IV
		1641	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1642	CODE:
		1643	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	void
		1648	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1649	PPCODE:
		1650	sv_unmagic (scalar, MMAP_MAGIC);
		1651	{
		1652	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1653	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1654	if (addr == (void *)-1)
		1655	XSRETURN_NO;
		1656
		1657	sv_force_normal (scalar);
		1658
		1659	/* we store the length in mg_obj, as namlen is I32 :/ */
		1660	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1661	->mg_obj = (SV *)length;
		1662
		1663	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1664
		1665	if (!(prot & PROT_WRITE))
		1666	SvREADONLY_on (scalar);
		1667
		1668	if (SvLEN (scalar))
		1669	Safefree (SvPVX (scalar));
		1670
		1671	SvPVX (scalar) = (char *)addr;
		1672	SvCUR_set (scalar, length);
		1673	SvLEN_set (scalar, 0);
		1674	SvPOK_only (scalar);
		1675
		1676	XSRETURN_YES;
		1677	}
		1678
		1679	void
		1680	munmap (SV *scalar)
		1681	CODE:
		1682	sv_unmagic (scalar, MMAP_MAGIC);
		1683
		1684	int
		1685	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1686	ALIAS:
		1687	mprotect = 1
		1688	CODE:
		1689	{
		1690	STRLEN svlen;
		1691	void *addr = SvPVbyte (scalar, svlen);
		1692	size_t len = SvUV (length);
		1693
		1694	if (offset < 0)
		1695	offset += svlen;
		1696
		1697	if (offset < 0 || offset > svlen)
		1698	croak ("offset outside of scalar");
		1699
		1700	if (!SvOK (length) || len + offset > svlen)
		1701	len = svlen - offset;
		1702
		1703	addr = (void *)(((intptr_t)addr) + offset);
		1704	eio_page_align (&addr, &len);
		1705
		1706	switch (ix)
		1707	{
		1708	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1709	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1710	}
		1711	}
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	int
		1716	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1717	CODE:
		1718	{
		1719	STRLEN svlen;
		1720	void *addr = SvPVbyte (scalar, svlen);
		1721	size_t len = SvUV (length);
		1722
		1723	if (offset < 0)
		1724	offset += svlen;
		1725
		1726	if (offset < 0 || offset > svlen)
		1727	croak ("offset outside of scalar");
		1728
		1729	if (!SvOK (length) || len + offset > svlen)
		1730	len = svlen - offset;
		1731
		1732	addr = (void *)(((intptr_t)addr) + offset);
		1733	eio_page_align (&addr, &len);
		1734	#if _POSIX_MEMLOCK_RANGE
		1735	RETVAL = munlock (addr, len);
		1736	#else
		1737	RETVAL = ((errno = ENOSYS), -1);
		1738	#endif
		1739	}
		1740	OUTPUT:
		1741	RETVAL
		1742
		1743	int
		1744	munlockall ()
		1745	CODE:
		1746	#if _POSIX_MEMLOCK
		1747	munlockall ();
		1748	#else
		1749	RETVAL = -1;
		1750	errno = ENOSYS;
		1751	#endif
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	void _on_next_submit (SV *cb)
		1756	CODE:
		1757	SvREFCNT_dec (on_next_submit);
		1758	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1759
		1760	PROTOTYPES: DISABLE
		1761
		1762	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1763
		1764	BOOT:
		1765	{
		1766	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1767	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1768	}
		1769
		1770	void
		1771	DESTROY (SV *self)
		1772	CODE:
		1773	{
		1774	aio_wd wd = SvAIO_WD (self);
		1775	#if HAVE_AT
		1776	SV *callback = &PL_sv_undef;
		1777	dREQ; /* clobbers next_pri :/ */
		1778	req->type = EIO_WD_CLOSE;
		1779	req->wd = wd;
		1780	REQ_SEND;
		1781	#else
		1782	eio_wd_close_sync (wd);
		1783	#endif
		1784	}
		1785
		1786	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1787
		1788	void
		1789	cancel (aio_req_ornot req)
		1790	CODE:
		1791	eio_cancel (req);
		1792
		1793	void
		1794	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1795	PPCODE:
		1796	{
		1797	if (GIMME_V != G_VOID)
		1798	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1799
		1800	if (items > 1)
		1801	{
		1802	SV *cb_cv =get_cb (callback);
		1803
		1804	SvREFCNT_dec (req->callback);
		1805	req->callback = SvREFCNT_inc (cb_cv);
		1806	}
		1807	}
		1808
		1809	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1810
		1811	void
		1812	add (aio_req grp, ...)
		1813	PPCODE:
		1814	{
		1815	int i;
		1816
		1817	if (grp->int1 == 2)
		1818	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1819
		1820	for (i = 1; i < items; ++i )
		1821	{
		1822	aio_req req;
		1823
		1824	if (GIMME_V != G_VOID)
		1825	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1826
		1827	req = SvAIO_REQ (ST (i));
		1828
		1829	if (req)
		1830	eio_grp_add (grp, req);
		1831	}
		1832	}
		1833
		1834	void
		1835	cancel_subs (aio_req_ornot req)
		1836	CODE:
		1837	req_cancel_subs (req);
		1838
		1839	void
		1840	result (aio_req grp, ...)
		1841	CODE:
		1842	{
		1843	int i;
		1844	AV *av;
		1845
		1846	grp->errorno = errno;
		1847
		1848	av = newAV ();
		1849	av_extend (av, items - 1);
		1850
		1851	for (i = 1; i < items; ++i )
		1852	av_push (av, newSVsv (ST (i)));
		1853
		1854	SvREFCNT_dec (grp->sv1);
		1855	grp->sv1 = (SV *)av;
		1856	}
		1857
		1858	void
		1859	errno (aio_req grp, int errorno = errno)
		1860	CODE:
		1861	grp->errorno = errorno;
		1862
		1863	void
		1864	limit (aio_req grp, int limit)
		1865	CODE:
		1866	eio_grp_limit (grp, limit);
		1867
		1868	void
		1869	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1870	CODE:
		1871	{
		1872	SvREFCNT_dec (grp->sv2);
		1873	grp->sv2 = newSVsv (callback);
		1874	grp->feed = aio_grp_feed;
		1875
		1876	if (grp->int2 <= 0)
		1877	grp->int2 = 2;
		1878
		1879	eio_grp_limit (grp, grp->int2);
		1880	}
		1881

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