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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.30 by root, Thu Aug 18 16:32:10 2005 UTC vs.
Revision 1.193 by root, Mon Jul 25 16:51:07 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
13	#include <unistd.h>	16	#include <limits.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	18	#include <sched.h>
17		19
18	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
19		23
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* perl namespace pollution */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	#undef VERSION
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		26
24	#if __ia64	27	/* perl stupidly overrides readdir and maybe others */
25	# define STACKSIZE 65536	28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		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;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	STRLEN stroffset; \
		113	SV *self;
		114
		115	#define EIO_NO_WRAPPERS 1
		116
		117	#include "libeio/config.h"
		118	#include "libeio/eio.h"
		119
		120	static int req_invoke (eio_req *req);
		121	#define EIO_FINISH(req) req_invoke (req)
		122	static void req_destroy (eio_req *grp);
		123	#define EIO_DESTROY(req) req_destroy (req)
		124
		125	#include "libeio/eio.c"
		126
		127	/* Linux/others */
		128	#ifndef O_ASYNC
		129	# define O_ASYNC 0
		130	#endif
		131	#ifndef O_DIRECT
		132	# define O_DIRECT 0
		133	#endif
		134	#ifndef O_NOATIME
		135	# define O_NOATIME 0
		136	#endif
		137
		138	/* POSIX */
		139	#ifndef O_CLOEXEC
		140	# define O_CLOEXEC 0
		141	#endif
		142	#ifndef O_NOFOLLOW
		143	# define O_NOFOLLOW 0
		144	#endif
		145	#ifndef O_NOCTTY
		146	# define O_NOCTTY 0
		147	#endif
		148	#ifndef O_NONBLOCK
		149	# define O_NONBLOCK 0
		150	#endif
		151	#ifndef O_EXEC
		152	# define O_EXEC 0
		153	#endif
		154	#ifndef O_SEARCH
		155	# define O_SEARCH 0
		156	#endif
		157	#ifndef O_DIRECTORY
		158	# define O_DIRECTORY 0
		159	#endif
		160	#ifndef O_DSYNC
		161	# define O_DSYNC 0
		162	#endif
		163	#ifndef O_RSYNC
		164	# define O_RSYNC 0
		165	#endif
		166	#ifndef O_SYNC
		167	# define O_SYNC 0
		168	#endif
		169	#ifndef O_TTY_INIT
		170	# define O_TTY_INIT 0
		171	#endif
		172
		173	#ifndef POSIX_FADV_NORMAL
		174	# define POSIX_FADV_NORMAL 0
		175	#endif
		176	#ifndef POSIX_FADV_SEQUENTIAL
		177	# define POSIX_FADV_SEQUENTIAL 0
		178	#endif
		179	#ifndef POSIX_FADV_RANDOM
		180	# define POSIX_FADV_RANDOM 0
		181	#endif
		182	#ifndef POSIX_FADV_NOREUSE
		183	# define POSIX_FADV_NOREUSE 0
		184	#endif
		185	#ifndef POSIX_FADV_WILLNEED
		186	# define POSIX_FADV_WILLNEED 0
		187	#endif
		188	#ifndef POSIX_FADV_DONTNEED
		189	# define POSIX_FADV_DONTNEED 0
		190	#endif
		191
		192	#if !HAVE_POSIX_FADVISE
		193	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		194	#endif
		195
		196	#ifndef POSIX_MADV_NORMAL
		197	# define POSIX_MADV_NORMAL 0
		198	#endif
		199	#ifndef POSIX_MADV_SEQUENTIAL
		200	# define POSIX_MADV_SEQUENTIAL 0
		201	#endif
		202	#ifndef POSIX_MADV_RANDOM
		203	# define POSIX_MADV_RANDOM 0
		204	#endif
		205	#ifndef POSIX_MADV_WILLNEED
		206	# define POSIX_MADV_WILLNEED 0
		207	#endif
		208	#ifndef POSIX_MADV_DONTNEED
		209	# define POSIX_MADV_DONTNEED 0
		210	#endif
		211
		212	#if !HAVE_POSIX_MADVISE
		213	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		214	#endif
		215
		216	#ifndef PROT_NONE
		217	# define PROT_NONE 0
		218	#endif
		219	#ifndef PROT_READ
		220	# define PROT_READ 0
		221	#endif
		222	#ifndef PROT_WRITE
		223	# define PROT_READ 0
		224	#endif
		225	#ifndef PROT_EXEC
		226	# define PROT_EXEC 0
		227	#endif
		228
		229	#ifndef ST_RDONLY
		230	# define ST_RDONLY 0
		231	#endif
		232	#ifndef ST_NOSUID
		233	# define ST_NOSUID 0
		234	#endif
		235	#ifndef ST_NODEV
		236	# define ST_NODEV 0
		237	#endif
		238	#ifndef ST_NOEXEC
		239	# define ST_NOEXEC 0
		240	#endif
		241	#ifndef ST_SYNCHRONOUS
		242	# define ST_SYNCHRONOUS 0
		243	#endif
		244	#ifndef ST_MANDLOCK
		245	# define ST_MANDLOCK 0
		246	#endif
		247	#ifndef ST_WRITE
		248	# define ST_WRITE 0
		249	#endif
		250	#ifndef ST_APPEND
		251	# define ST_APPEND 0
		252	#endif
		253	#ifndef ST_IMMUTABLE
		254	# define ST_IMMUTABLE 0
		255	#endif
		256	#ifndef ST_NOATIME
		257	# define ST_NOATIME 0
		258	#endif
		259	#ifndef ST_NODIRATIME
		260	# define ST_NODIRATIME 0
		261	#endif
		262	#ifndef ST_RELATIME
		263	# define ST_RELATIME 0
		264	#endif
		265
		266	#ifndef S_IFIFO
		267	# define S_IFIFO 0
		268	#endif
		269	#ifndef S_IFCHR
		270	# define S_IFCHR 0
		271	#endif
		272	#ifndef S_IFBLK
		273	# define S_IFBLK 0
		274	#endif
		275	#ifndef S_IFLNK
		276	# define S_IFLNK 0
		277	#endif
		278	#ifndef S_IFREG
		279	# define S_IFREG 0
		280	#endif
		281	#ifndef S_IFDIR
		282	# define S_IFDIR 0
		283	#endif
		284	#ifndef S_IFWHT
		285	# define S_IFWHT 0
		286	#endif
		287	#ifndef S_IFSOCK
		288	# define S_IFSOCK 0
		289	#endif
		290
		291	#ifndef MAP_ANONYMOUS
		292	# ifdef MAP_ANON
		293	# define MAP_ANONYMOUS MAP_ANON
		294	# else
		295	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		296	# endif
		297	#endif
		298	#ifndef MAP_HUGETLB
		299	# define MAP_HUGETLB 0
		300	#endif
		301	#ifndef MAP_LOCKED
		302	# define MAP_LOCKED 0
		303	#endif
		304	#ifndef MAP_NORESERVE
		305	# define MAP_NORESERVE 0
		306	#endif
		307	#ifndef MAP_POPULATE
		308	# define MAP_POPULATE 0
		309	#endif
		310	#ifndef MAP_NONBLOCK
		311	# define MAP_NONBLOCK 0
		312	#endif
		313
		314	#ifndef makedev
		315	# define makedev(maj,min) (((maj) << 8) | (min))
		316	#endif
		317	#ifndef major
		318	# define major(dev) ((dev) >> 8)
		319	#endif
		320	#ifndef minor
		321	# define minor(dev) ((dev) & 0xff)
		322	#endif
		323
		324	#ifndef PAGESIZE
		325	# define PAGESIZE sysconf (_SC_PAGESIZE)
28	#endif	326	#endif
29		327
30	enum {	328	enum {
31	REQ_QUIT,	329	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	};	330	};
39		331
40	typedef struct aio_cb {
41	struct aio_cb *volatile next;
42
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, wanted;	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	/* read any signals sent by the worker threads */
122	char buf [32];
123	while (read (respipe [0], buf, 32) == 32)
124	;
125
126	rese = 0;
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->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);
149
150	if (req->statdata)
151	{
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);
155	}
156
157	ENTER;
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID | G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);
186	}
187	}
188
189	LEAVE;
190
191	errno = errorno;
192	count++;
193	}
194
195	free_req (req);
196	}
197
198	return count;
199	}
200
201	static void *aio_proc(void *arg);
202
203	static void
204	start_thread (void)
205	{
206	sigset_t fullsigset, oldsigset;
207	pthread_t tid;
208	pthread_attr_t attr;
209
210	pthread_attr_init (&attr);
211	pthread_attr_setstacksize (&attr, STACKSIZE);
212	// pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
213
214	sigfillset (&fullsigset);
215	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
216
217	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
218	started++;
219
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);
221	}
222
223	static void
224	send_req (aio_req req)
225	{
226	while (started < wanted && nreqs >= started)
227	start_thread ();
228
229	nreqs++;
230
231	pthread_mutex_lock (&reqlock);
232
233	req->next = 0;
234
235	if (reqe)
236	{
237	reqe->next = req;
238	reqe = req;
239	}
240	else
241	reqe = reqs = req;
242
243	pthread_cond_signal (&reqwait);
244	pthread_mutex_unlock (&reqlock);
245
246	if (nreqs > max_outstanding)
247	for (;;)
248	{
249	poll_cb ();
250
251	if (nreqs <= max_outstanding)
252	break;
253
254	poll_wait ();
255	}
256	}
257
258	static void
259	end_thread (void)
260	{
261	aio_req req;
262	Newz (0, req, 1, aio_cb);
263	req->type = REQ_QUIT;
264
265	send_req (req);
266	}
267
268	static void min_parallel (int nthreads)
269	{
270	if (wanted < nthreads)
271	wanted = nthreads;
272	}
273
274	static void max_parallel (int nthreads)
275	{
276	int cur = started;
277
278	if (wanted > nthreads)
279	wanted = nthreads;
280
281	while (cur > wanted)
282	{
283	end_thread ();
284	cur--;
285	}
286
287	while (started > wanted)
288	{
289	poll_wait ();
290	poll_cb ();
291	}
292	}
293
294	static void create_pipe ()
295	{
296	if (pipe (respipe))
297	croak ("unable to initialize result pipe");
298
299	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
300	croak ("cannot set result pipe to nonblocking mode");
301
302	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
303	croak ("cannot set result pipe to nonblocking mode");
304	}
305
306	static void atfork_prepare (void)
307	{
308	pthread_mutex_lock (&reqlock);
309	pthread_mutex_lock (&reslock);
310	}
311
312	static void atfork_parent (void)
313	{
314	pthread_mutex_unlock (&reslock);
315	pthread_mutex_unlock (&reqlock);
316	}
317
318	static void atfork_child (void)
319	{
320	aio_req prv;
321
322	started = 0;
323
324	while (reqs)
325	{
326	prv = reqs;
327	reqs = prv->next;
328	free_req (prv);
329	}
330
331	reqs = reqe = 0;
332
333	while (ress)
334	{
335	prv = ress;
336	ress = prv->next;
337	free_req (prv);
338	}
339
340	ress = rese = 0;
341
342	close (respipe [0]);
343	close (respipe [1]);
344	create_pipe ();
345
346	atfork_parent ();
347	}
348
349	/*****************************************************************************/
350	/* work around various missing functions */
351
352	#if !HAVE_PREADWRITE
353	# define pread aio_pread
354	# define pwrite aio_pwrite
355
356	/*
357	* make our pread/pwrite safe against themselves, but not against
358	* normal read/write by using a mutex. slows down execution a lot,
359	* but that's your problem, not mine.
360	*/
361	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
362
363	static ssize_t
364	pread (int fd, void *buf, size_t count, off_t offset)
365	{
366	ssize_t res;
367	off_t ooffset;
368
369	pthread_mutex_lock (&iolock);
370	ooffset = lseek (fd, 0, SEEK_CUR);
371	lseek (fd, offset, SEEK_SET);
372	res = read (fd, buf, count);
373	lseek (fd, ooffset, SEEK_SET);
374	pthread_mutex_unlock (&iolock);
375
376	return res;
377	}
378
379	static ssize_t
380	pwrite (int fd, void *buf, size_t count, off_t offset)
381	{
382	ssize_t res;
383	off_t ooffset;
384
385	pthread_mutex_lock (&iolock);
386	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);
388	res = write (fd, buf, count);
389	lseek (fd, offset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);
391
392	return res;
393	}
394	#endif
395
396	#if !HAVE_FDATASYNC
397	# define fdatasync fsync
398	#endif
399
400	#if !HAVE_READAHEAD
401	# define readahead aio_readahead
402
403	static char readahead_buf[4096];
404
405	static ssize_t
406	readahead (int fd, off_t offset, size_t count)
407	{
408	while (count > 0)
409	{
410	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
411
412	pread (fd, readahead_buf, len, offset);
413	offset += len;
414	count -= len;
415	}
416
417	errno = 0;
418	}
419	#endif
420
421	/*****************************************************************************/
422
423	static void *
424	aio_proc (void *thr_arg)
425	{
426	aio_req req;
427	int type;
428
429	do
430	{
431	pthread_mutex_lock (&reqlock);
432
433	for (;;)
434	{
435	req = reqs;
436
437	if (reqs)
438	{
439	reqs = reqs->next;
440	if (!reqs) reqe = 0;
441	}
442
443	if (req)
444	break;
445
446	pthread_cond_wait (&reqwait, &reqlock);
447	}
448
449	pthread_mutex_unlock (&reqlock);
450
451	errno = 0; /* strictly unnecessary */
452
453	type = req->type;
454
455	switch (type)
456	{
457	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
458	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
459
460	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
461
462	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
463	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
464	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
465
466	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
467	case REQ_CLOSE: req->result = close (req->fd); break;
468	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
469	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
470	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
471
472	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
473	case REQ_FSYNC: req->result = fsync (req->fd); break;
474
475	case REQ_QUIT:
476	break;
477
478	default:
479	req->result = ENOSYS;
480	break;
481	}
482
483	req->errorno = errno;
484
485	pthread_mutex_lock (&reslock);
486
487	req->next = 0;
488
489	if (rese)
490	{
491	rese->next = req;
492	rese = req;
493	}	440	}
494	else	441	else
495	{	442	{
496	rese = ress = req;	443	sv_result = newSViv (req->result);
497		444	SvREADONLY_on (sv_result);
498	/* write a dummy byte to the pipe so fh becomes ready */
499	write (respipe [1], &respipe, 1);
500	}	445	}
501		446
502	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	#ifndef _WIN32
		547	if (req->result >= 0)
		548	{
		549	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		550	HV *hv = newHV ();
		551
		552	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		553
		554	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		555	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		556	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		557	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		558	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		559	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		560	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		561	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		562	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		563	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		564	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		565	}
		566	#endif
		567
		568	PUSHs (rv);
		569	}
		570
		571	break;
		572
		573	case EIO_GROUP:
		574	req->int1 = 2; /* mark group as finished */
		575
		576	if (req->sv1)
		577	{
		578	int i;
		579	AV *av = (AV *)req->sv1;
		580
		581	EXTEND (SP, AvFILL (av) + 1);
		582	for (i = 0; i <= AvFILL (av); ++i)
		583	PUSHs (*av_fetch (av, i, 0));
		584	}
		585	break;
		586
		587	case EIO_NOP:
		588	case EIO_BUSY:
		589	break;
		590
		591	case EIO_READLINK:
		592	case EIO_REALPATH:
		593	if (req->result > 0)
		594	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		595	break;
		596
		597	case EIO_STAT:
		598	case EIO_LSTAT:
		599	case EIO_FSTAT:
		600	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		601	PL_laststatval = req->result;
		602	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		603	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		604	PUSHs (sv_result);
		605	break;
		606
		607	case EIO_READ:
		608	{
		609	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		610	*SvEND (req->sv2) = 0;
		611	SvPOK_only (req->sv2);
		612	SvSETMAGIC (req->sv2);
		613	PUSHs (sv_result);
		614	}
		615	break;
		616
		617	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		618	if (req->result > 0)
		619	SvIV_set (sv_result, 0);
		620	/* FALLTHROUGH */
		621
		622	default:
		623	PUSHs (sv_result);
		624	break;
		625	}
		626
		627	errno = req->errorno;
		628
		629	PUTBACK;
		630	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		631	SPAGAIN;
		632
		633	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		634	SvREFCNT_dec (sv_result);
		635	else
		636	sv_result_cache = sv_result;
		637
		638	FREETMPS;
		639	LEAVE;
		640
		641	PUTBACK;
503	}	642	}
504	while (type != REQ_QUIT);	643
		644	return !!SvTRUE (ERRSV);
		645	}
		646
		647	static void req_destroy (aio_req req)
		648	{
		649	if (req->self)
		650	{
		651	sv_unmagic (req->self, PERL_MAGIC_ext);
		652	SvREFCNT_dec (req->self);
		653	}
		654
		655	SvREFCNT_dec (req->sv1);
		656	SvREFCNT_dec (req->sv2);
		657	SvREFCNT_dec (req->callback);
		658
		659	Safefree (req);
		660	}
		661
		662	static void req_cancel_subs (aio_req grp)
		663	{
		664	if (grp->type != EIO_GROUP)
		665	return;
		666
		667	SvREFCNT_dec (grp->sv2);
		668	grp->sv2 = 0;
		669
		670	eio_grp_cancel (grp);
		671	}
		672
		673	static void create_respipe (void)
		674	{
		675	if (s_epipe_renew (&respipe))
		676	croak ("IO::AIO: unable to initialize result pipe");
		677	}
		678
		679	static void poll_wait (void)
		680	{
		681	while (eio_nreqs ())
		682	{
		683	int size;
		684
		685	X_LOCK (reslock);
		686	size = res_queue.size;
		687	X_UNLOCK (reslock);
		688
		689	if (size)
		690	return;
		691
		692	etp_maybe_start_thread ();
		693
		694	s_epipe_wait (&respipe);
		695	}
		696	}
		697
		698	static int poll_cb (void)
		699	{
		700	for (;;)
		701	{
		702	int res = eio_poll ();
		703
		704	if (res > 0)
		705	croak (0);
		706
		707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
		709
		710	poll_wait ();
		711	}
		712	}
		713
		714	static void ecb_cold
		715	reinit (void)
		716	{
		717	create_respipe ();
		718
		719	if (eio_init (want_poll, done_poll) < 0)
		720	croak ("IO::AIO: unable to initialise eio library");
		721	}
		722
		723	/*****************************************************************************/
		724
		725	#if !_POSIX_MAPPED_FILES
		726	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		727	# define munmap(addr,length) (errno = ENOSYS, -1)
		728	#endif
		729
		730	#if !_POSIX_MEMORY_PROTECTION
		731	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		732	# define PROT_NONE 0
		733	# define PROT_WRITE 0
		734	# define MAP_PRIVATE 0
		735	# define MAP_SHARED 0
		736	# define MAP_FIXED 0
		737	#endif
		738
		739	#define MMAP_MAGIC PERL_MAGIC_ext
		740
		741	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		742	{
		743	int old_errno = errno;
		744	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		745	errno = old_errno;
		746
		747	mg->mg_obj = 0; /* just in case */
		748
		749	SvREADONLY_off (sv);
		750
		751	if (SvPVX (sv) != mg->mg_ptr)
		752	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		753
		754	SvCUR_set (sv, 0);
		755	SvPVX (sv) = 0;
		756	SvOK_off (sv);
505		757
506	return 0;	758	return 0;
507	}	759	}
508		760
		761	static MGVTBL mmap_vtbl = {
		762	0, 0, 0, 0, mmap_free
		763	};
		764
		765	/*****************************************************************************/
		766
		767	static SV * get_cb (SV *cb_sv)
		768	{
		769	SvGETMAGIC (cb_sv);
		770	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		771	}
		772
509	#define dREQ \	773	#define dREQ \
		774	SV *cb_cv; \
510	aio_req req; \	775	aio_req req; \
		776	int req_pri = next_pri; \
		777	next_pri = EIO_PRI_DEFAULT; \
511	\	778	\
512	if (SvOK (callback) && !SvROK (callback)) \	779	cb_cv = get_cb (callback); \
513	croak ("clalback must be undef or of reference type"); \
514	\	780	\
515	Newz (0, req, 1, aio_cb); \	781	Newz (0, req, 1, eio_req); \
516	if (!req) \	782	if (!req) \
517	croak ("out of memory during aio_req allocation"); \	783	croak ("out of memory during eio_req allocation"); \
518	\	784	\
519	req->callback = newSVsv (callback);	785	req->callback = SvREFCNT_inc (cb_cv); \
520		786	req->pri = req_pri
		787
		788	#define REQ_SEND \
		789	PUTBACK; \
		790	req_submit (req); \
		791	SPAGAIN; \
		792	\
		793	if (GIMME_V != G_VOID) \
		794	XPUSHs (req_sv (req, aio_req_stash));
		795
521	MODULE = IO::AIO PACKAGE = IO::AIO	796	MODULE = IO::AIO PACKAGE = IO::AIO
522		797
523	PROTOTYPES: ENABLE	798	PROTOTYPES: ENABLE
524		799
525	BOOT:	800	BOOT:
526	{	801	{
527	create_pipe ();	802	static const struct {
528	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	803	const char *name;
529	}	804	IV iv;
		805	} *civ, const_iv[] = {
		806	# define const_niv(name, value) { # name, (IV) value },
		807	# define const_iv(name) { # name, (IV) name },
		808	# define const_eio(name) { # name, (IV) EIO_ ## name },
		809	const_iv (EXDEV)
		810	const_iv (ENOSYS)
		811	const_iv (O_RDONLY)
		812	const_iv (O_WRONLY)
		813	const_iv (O_RDWR)
		814	const_iv (O_CREAT)
		815	const_iv (O_TRUNC)
		816	const_iv (O_EXCL)
		817	const_iv (O_APPEND)
530		818
		819	const_iv (O_ASYNC)
		820	const_iv (O_DIRECT)
		821	const_iv (O_NOATIME)
		822
		823	const_iv (O_CLOEXEC)
		824	const_iv (O_NOCTTY)
		825	const_iv (O_NOFOLLOW)
		826	const_iv (O_NONBLOCK)
		827	const_iv (O_EXEC)
		828	const_iv (O_SEARCH)
		829	const_iv (O_DIRECTORY)
		830	const_iv (O_DSYNC)
		831	const_iv (O_RSYNC)
		832	const_iv (O_SYNC)
		833	const_iv (O_TTY_INIT)
		834
		835	const_iv (S_IFIFO)
		836	const_iv (S_IFCHR)
		837	const_iv (S_IFBLK)
		838	const_iv (S_IFLNK)
		839	const_iv (S_IFREG)
		840	const_iv (S_IFDIR)
		841	const_iv (S_IFWHT)
		842	const_iv (S_IFSOCK)
		843	const_iv (S_IFMT)
		844
		845	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		846	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		847	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		848	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		849	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		850	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		851
		852	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		853	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		854	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		855	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		856	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		857
		858	const_iv (ST_RDONLY)
		859	const_iv (ST_NOSUID)
		860	const_iv (ST_NODEV)
		861	const_iv (ST_NOEXEC)
		862	const_iv (ST_SYNCHRONOUS)
		863	const_iv (ST_MANDLOCK)
		864	const_iv (ST_WRITE)
		865	const_iv (ST_APPEND)
		866	const_iv (ST_IMMUTABLE)
		867	const_iv (ST_NOATIME)
		868	const_iv (ST_NODIRATIME)
		869	const_iv (ST_RELATIME)
		870
		871	const_iv (PROT_NONE)
		872	const_iv (PROT_EXEC)
		873	const_iv (PROT_READ)
		874	const_iv (PROT_WRITE)
		875
		876	/*const_iv (MAP_FIXED)*/
		877	const_iv (MAP_PRIVATE)
		878	const_iv (MAP_SHARED)
		879	const_iv (MAP_ANONYMOUS)
		880
		881	/* linuxish */
		882	const_iv (MAP_HUGETLB)
		883	const_iv (MAP_LOCKED)
		884	const_iv (MAP_NORESERVE)
		885	const_iv (MAP_POPULATE)
		886	const_iv (MAP_NONBLOCK)
		887
		888	const_eio (MCL_FUTURE)
		889	const_eio (MCL_CURRENT)
		890
		891	const_eio (MS_ASYNC)
		892	const_eio (MS_INVALIDATE)
		893	const_eio (MS_SYNC)
		894
		895	const_eio (MT_MODIFY)
		896
		897	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		898	const_eio (SYNC_FILE_RANGE_WRITE)
		899	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		900
		901	const_eio (FALLOC_FL_KEEP_SIZE)
		902
		903	const_eio (READDIR_DENTS)
		904	const_eio (READDIR_DIRS_FIRST)
		905	const_eio (READDIR_STAT_ORDER)
		906	const_eio (READDIR_FOUND_UNKNOWN)
		907
		908	const_eio (DT_UNKNOWN)
		909	const_eio (DT_FIFO)
		910	const_eio (DT_CHR)
		911	const_eio (DT_DIR)
		912	const_eio (DT_BLK)
		913	const_eio (DT_REG)
		914	const_eio (DT_LNK)
		915	const_eio (DT_SOCK)
		916	const_eio (DT_WHT)
		917	};
		918
		919	aio_stash = gv_stashpv ("IO::AIO" , 1);
		920	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		921	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		922
		923	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		924	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		925
		926	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		927
		928	reinit ();
		929	}
		930
531	void	931	void
532	min_parallel(nthreads)	932	reinit ()
533	int nthreads	933	PROTOTYPE:
		934
		935	void
		936	max_poll_reqs (unsigned int nreqs)
534	PROTOTYPE: $	937	PROTOTYPE: $
		938	CODE:
		939	eio_set_max_poll_reqs (nreqs);
535		940
536	void	941	void
537	max_parallel(nthreads)	942	max_poll_time (double nseconds)
538	int nthreads
539	PROTOTYPE: $	943	PROTOTYPE: $
540
541	int
542	max_outstanding(nreqs)
543	int nreqs
544	PROTOTYPE: $
545	CODE:	944	CODE:
546	RETVAL = max_outstanding;	945	eio_set_max_poll_time (nseconds);
		946
		947	void
		948	min_parallel (unsigned int nthreads)
		949	PROTOTYPE: $
		950	CODE:
		951	eio_set_min_parallel (nthreads);
		952
		953	void
		954	max_parallel (unsigned int nthreads)
		955	PROTOTYPE: $
		956	CODE:
		957	eio_set_max_parallel (nthreads);
		958
		959	void
		960	max_idle (unsigned int nthreads)
		961	PROTOTYPE: $
		962	CODE:
		963	eio_set_max_idle (nthreads);
		964
		965	void
		966	idle_timeout (unsigned int seconds)
		967	PROTOTYPE: $
		968	CODE:
		969	eio_set_idle_timeout (seconds);
		970
		971	void
		972	max_outstanding (unsigned int maxreqs)
		973	PROTOTYPE: $
		974	CODE:
547	max_outstanding = nreqs;	975	max_outstanding = maxreqs;
548		976
549	void	977	void
550	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	978	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
551	SV * pathname
552	int flags
553	int mode
554	SV * callback
555	PROTOTYPE: $$$;$
556	CODE:	979	PPCODE:
557	{	980	{
558	dREQ;	981	dREQ;
559		982
560	req->type = REQ_OPEN;	983	req->type = EIO_OPEN;
561	req->data = newSVsv (pathname);	984	req->sv1 = newSVsv (pathname);
562	req->dataptr = SvPVbyte_nolen (req->data);	985	req->ptr1 = SvPVbyte_nolen (req->sv1);
563	req->fd = flags;	986	req->int1 = flags;
564	req->mode = mode;	987	req->int2 = mode;
565		988
566	send_req (req);	989	REQ_SEND;
567	}	990	}
568		991
569	void	992	void
570	aio_close(fh,callback=&PL_sv_undef)	993	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
571	SV * fh
572	SV * callback
573	PROTOTYPE: $;$
574	ALIAS:	994	ALIAS:
575	aio_close = REQ_CLOSE
576	aio_fsync = REQ_FSYNC	995	aio_fsync = EIO_FSYNC
577	aio_fdatasync = REQ_FDATASYNC	996	aio_fdatasync = EIO_FDATASYNC
		997	aio_syncfs = EIO_SYNCFS
578	CODE:	998	PPCODE:
579	{	999	{
		1000	int fd = s_fileno_croak (fh, 0);
580	dREQ;	1001	dREQ;
581		1002
582	req->type = ix;	1003	req->type = ix;
583	req->fh = newSVsv (fh);	1004	req->sv1 = newSVsv (fh);
584	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1005	req->int1 = fd;
585		1006
586	send_req (req);	1007	REQ_SEND (req);
587	}	1008	}
588		1009
589	void	1010	void
		1011	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1012	PPCODE:
		1013	{
		1014	int fd = s_fileno_croak (fh, 0);
		1015	dREQ;
		1016
		1017	req->type = EIO_SYNC_FILE_RANGE;
		1018	req->sv1 = newSVsv (fh);
		1019	req->int1 = fd;
		1020	req->offs = offset;
		1021	req->size = nbytes;
		1022	req->int2 = flags;
		1023
		1024	REQ_SEND (req);
		1025	}
		1026
		1027	void
		1028	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1029	PPCODE:
		1030	{
		1031	int fd = s_fileno_croak (fh, 0);
		1032	dREQ;
		1033
		1034	req->type = EIO_FALLOCATE;
		1035	req->sv1 = newSVsv (fh);
		1036	req->int1 = fd;
		1037	req->int2 = mode;
		1038	req->offs = offset;
		1039	req->size = len;
		1040
		1041	REQ_SEND (req);
		1042	}
		1043
		1044	void
		1045	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1046	PPCODE:
		1047	{
		1048	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1049	int fd = s_fileno_croak (fh, 0);
		1050	dREQ;
		1051
		1052	if (expect_false (close_fd < 0))
		1053	{
		1054	int pipefd [2];
		1055
		1056	if (
		1057	#ifdef _WIN32
		1058	_pipe (pipefd, 1, _O_BINARY) < 0
		1059	#else
		1060	pipe (pipefd) < 0
		1061	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1062	#endif
		1063	|| close (pipefd [1]) < 0
		1064	)
		1065	abort (); /*D*/
		1066
		1067	close_fd = pipefd [0];
		1068	}
		1069
		1070	req->type = EIO_DUP2;
		1071	req->int1 = close_fd;
		1072	req->sv2 = newSVsv (fh);
		1073	req->int2 = fd;
		1074
		1075	REQ_SEND (req);
		1076	}
		1077
		1078	void
590	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1079	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
591	SV * fh
592	UV offset
593	IV length
594	SV * data
595	IV dataoffset
596	SV * callback
597	ALIAS:	1080	ALIAS:
598	aio_read = REQ_READ	1081	aio_read = EIO_READ
599	aio_write = REQ_WRITE	1082	aio_write = EIO_WRITE
600	PROTOTYPE: $$$$$;$
601	CODE:	1083	PPCODE:
602	{	1084	{
603	aio_req req;
604	STRLEN svlen;	1085	STRLEN svlen;
		1086	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
605	char *svptr = SvPVbyte (data, svlen);	1087	char *svptr = SvPVbyte (data, svlen);
606		1088	UV len = SvUV (length);
607	SvUPGRADE (data, SVt_PV);
608	SvPOK_on (data);
609		1089
610	if (dataoffset < 0)	1090	if (dataoffset < 0)
611	dataoffset += svlen;	1091	dataoffset += svlen;
612		1092
613	if (dataoffset < 0 || dataoffset > svlen)	1093	if (dataoffset < 0 || dataoffset > svlen)
614	croak ("data offset outside of string");	1094	croak ("dataoffset outside of data scalar");
615		1095
616	if (ix == REQ_WRITE)	1096	if (ix == EIO_WRITE)
617	{	1097	{
618	/* write: check length and adjust. */	1098	/* write: check length and adjust. */
619	if (length < 0 || length + dataoffset > svlen)	1099	if (!SvOK (length) || len + dataoffset > svlen)
620	length = svlen - dataoffset;	1100	len = svlen - dataoffset;
621	}	1101	}
622	else	1102	else
623	{	1103	{
624	/* read: grow scalar as necessary */	1104	/* read: check type and grow scalar as necessary */
		1105	SvUPGRADE (data, SVt_PV);
625	svptr = SvGROW (data, length + dataoffset);	1106	svptr = SvGROW (data, len + dataoffset + 1);
626	}	1107	}
627
628	if (length < 0)
629	croak ("length must not be negative");
630		1108
631	{	1109	{
632	dREQ;	1110	dREQ;
633		1111
634	req->type = ix;	1112	req->type = ix;
635	req->fh = newSVsv (fh);	1113	req->sv1 = newSVsv (fh);
636	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1114	req->int1 = fd;
637	: IoOFP (sv_2io (fh)));	1115	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
638	req->offset = offset;	1116	req->size = len;
639	req->length = length;
640	req->data = SvREFCNT_inc (data);	1117	req->sv2 = SvREFCNT_inc (data);
641	req->dataptr = (char *)svptr + dataoffset;	1118	req->ptr2 = (char *)svptr + dataoffset;
		1119	req->stroffset = dataoffset;
642		1120
643	if (!SvREADONLY (data))	1121	if (!SvREADONLY (data))
644	{	1122	{
645	SvREADONLY_on (data);	1123	SvREADONLY_on (data);
646	req->data2ptr = (void *)data;	1124	req->flags |= FLAG_SV2_RO_OFF;
647	}	1125	}
648		1126
649	send_req (req);	1127	REQ_SEND;
650	}	1128	}
651	}	1129	}
652		1130
653	void	1131	void
654	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1132	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
655	SV * fh	1133	ALIAS:
656	UV offset	1134	aio_readlink = EIO_READLINK
657	IV length	1135	aio_realpath = EIO_REALPATH
658	SV * callback
659	PROTOTYPE: $$$;$
660	CODE:	1136	PPCODE:
661	{	1137	{
		1138	dREQ;
		1139
		1140	req->type = ix;
		1141	req->sv1 = newSVsv (path);
		1142	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1143
		1144	REQ_SEND;
		1145	}
		1146
		1147	void
		1148	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1149	PPCODE:
		1150	{
		1151	int ifd = s_fileno_croak (in_fh , 0);
		1152	int ofd = s_fileno_croak (out_fh, 1);
662	dREQ;	1153	dREQ;
663		1154
		1155	req->type = EIO_SENDFILE;
		1156	req->sv1 = newSVsv (out_fh);
		1157	req->int1 = ofd;
		1158	req->sv2 = newSVsv (in_fh);
		1159	req->int2 = ifd;
		1160	req->offs = in_offset;
		1161	req->size = length;
		1162
		1163	REQ_SEND;
		1164	}
		1165
		1166	void
		1167	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1168	PPCODE:
		1169	{
		1170	int fd = s_fileno_croak (fh, 0);
		1171	dREQ;
		1172
664	req->type = REQ_READAHEAD;	1173	req->type = EIO_READAHEAD;
665	req->fh = newSVsv (fh);	1174	req->sv1 = newSVsv (fh);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1175	req->int1 = fd;
667	req->offset = offset;	1176	req->offs = offset;
668	req->length = length;	1177	req->size = length;
669		1178
670	send_req (req);	1179	REQ_SEND;
671	}	1180	}
672		1181
673	void	1182	void
674	aio_stat(fh_or_path,callback=&PL_sv_undef)	1183	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
675	SV * fh_or_path
676	SV * callback
677	ALIAS:	1184	ALIAS:
678	aio_stat = REQ_STAT	1185	aio_stat = EIO_STAT
679	aio_lstat = REQ_LSTAT	1186	aio_lstat = EIO_LSTAT
		1187	aio_statvfs = EIO_STATVFS
680	CODE:	1188	PPCODE:
681	{	1189	{
682	dREQ;	1190	dREQ;
683		1191
684	New (0, req->statdata, 1, Stat_t);	1192	req->sv1 = newSVsv (fh_or_path);
685	if (!req->statdata)
686	{
687	free_req (req);
688	croak ("out of memory during aio_req->statdata allocation");
689	}
690		1193
691	if (SvPOK (fh_or_path))	1194	if (SvPOK (req->sv1))
692	{	1195	{
693	req->type = ix;	1196	req->type = ix;
694	req->data = newSVsv (fh_or_path);
695	req->dataptr = SvPVbyte_nolen (req->data);	1197	req->ptr1 = SvPVbyte_nolen (req->sv1);
696	}	1198	}
697	else	1199	else
698	{	1200	{
699	req->type = REQ_FSTAT;	1201	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
700	req->fh = newSVsv (fh_or_path);
701	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1202	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
702	}	1203	}
703		1204
704	send_req (req);	1205	REQ_SEND;
705	}	1206	}
706		1207
		1208	UV
		1209	major (UV dev)
		1210	ALIAS:
		1211	minor = 1
		1212	CODE:
		1213	RETVAL = ix ? major (dev) : minor (dev);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	UV
		1218	makedev (UV maj, UV min)
		1219	CODE:
		1220	RETVAL = makedev (maj, min);
		1221	OUTPUT:
		1222	RETVAL
		1223
707	void	1224	void
		1225	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1226	PPCODE:
		1227	{
		1228	dREQ;
		1229
		1230	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1231	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1232	req->sv1 = newSVsv (fh_or_path);
		1233
		1234	if (SvPOK (req->sv1))
		1235	{
		1236	req->type = EIO_UTIME;
		1237	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1238	}
		1239	else
		1240	{
		1241	req->type = EIO_FUTIME;
		1242	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1243	}
		1244
		1245	REQ_SEND;
		1246	}
		1247
		1248	void
		1249	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1250	PPCODE:
		1251	{
		1252	dREQ;
		1253
		1254	req->sv1 = newSVsv (fh_or_path);
		1255	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1256
		1257	if (SvPOK (req->sv1))
		1258	{
		1259	req->type = EIO_TRUNCATE;
		1260	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1261	}
		1262	else
		1263	{
		1264	req->type = EIO_FTRUNCATE;
		1265	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1266	}
		1267
		1268	REQ_SEND;
		1269	}
		1270
		1271	void
		1272	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1273	ALIAS:
		1274	aio_chmod = EIO_CHMOD
		1275	aio_mkdir = EIO_MKDIR
		1276	PPCODE:
		1277	{
		1278	dREQ;
		1279
		1280	req->int2 = mode;
		1281	req->sv1 = newSVsv (fh_or_path);
		1282
		1283	if (SvPOK (req->sv1))
		1284	{
		1285	req->type = ix;
		1286	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1287	}
		1288	else
		1289	{
		1290	req->type = EIO_FCHMOD;
		1291	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1292	}
		1293
		1294	REQ_SEND;
		1295	}
		1296
		1297	void
		1298	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1299	PPCODE:
		1300	{
		1301	dREQ;
		1302
		1303	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1304	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1305	req->sv1 = newSVsv (fh_or_path);
		1306
		1307	if (SvPOK (req->sv1))
		1308	{
		1309	req->type = EIO_CHOWN;
		1310	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1311	}
		1312	else
		1313	{
		1314	req->type = EIO_FCHOWN;
		1315	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1316	}
		1317
		1318	REQ_SEND;
		1319	}
		1320
		1321	void
		1322	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1323	PPCODE:
		1324	{
		1325	dREQ;
		1326
		1327	req->type = EIO_READDIR;
		1328	req->sv1 = newSVsv (pathname);
		1329	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1330	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1331
		1332	if (flags & EIO_READDIR_DENTS)
		1333	req->int1 |= EIO_READDIR_CUSTOM2;
		1334
		1335	REQ_SEND;
		1336	}
		1337
		1338	void
708	aio_unlink(pathname,callback=&PL_sv_undef)	1339	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
709	SV * pathname
710	SV * callback
711	ALIAS:	1340	ALIAS:
712	aio_unlink = REQ_UNLINK	1341	aio_unlink = EIO_UNLINK
713	aio_rmdir = REQ_RMDIR	1342	aio_rmdir = EIO_RMDIR
		1343	aio_readdir = EIO_READDIR
714	CODE:	1344	PPCODE:
715	{	1345	{
716	dREQ;	1346	dREQ;
717		1347
718	req->type = ix;	1348	req->type = ix;
719	req->data = newSVsv (pathname);	1349	req->sv1 = newSVsv (pathname);
720	req->dataptr = SvPVbyte_nolen (req->data);	1350	req->ptr1 = SvPVbyte_nolen (req->sv1);
721
722	send_req (req);
723	}
724		1351
		1352	REQ_SEND;
		1353	}
		1354
725	void	1355	void
726	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1356	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
727	SV * oldpath	1357	ALIAS:
728	SV * newpath	1358	aio_link = EIO_LINK
729	SV * callback	1359	aio_symlink = EIO_SYMLINK
		1360	aio_rename = EIO_RENAME
730	CODE:	1361	PPCODE:
731	{	1362	{
732	dREQ;	1363	dREQ;
733		1364
734	req->type = REQ_SYMLINK;	1365	req->type = ix;
735	req->fh = newSVsv (oldpath);	1366	req->sv1 = newSVsv (oldpath);
736	req->data2ptr = SvPVbyte_nolen (req->fh);	1367	req->ptr1 = SvPVbyte_nolen (req->sv1);
737	req->data = newSVsv (newpath);	1368	req->sv2 = newSVsv (newpath);
738	req->dataptr = SvPVbyte_nolen (req->data);	1369	req->ptr2 = SvPVbyte_nolen (req->sv2);
739		1370
740	send_req (req);	1371	REQ_SEND;
741	}	1372	}
742		1373
743	void	1374	void
744	flush()	1375	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
745	PROTOTYPE:	1376	PPCODE:
		1377	{
		1378	dREQ;
		1379
		1380	req->type = EIO_MKNOD;
		1381	req->sv1 = newSVsv (pathname);
		1382	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1383	req->int2 = (mode_t)mode;
		1384	req->offs = dev;
		1385
		1386	REQ_SEND;
		1387	}
		1388
		1389	void
		1390	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1391	ALIAS:
		1392	aio_mtouch = EIO_MTOUCH
		1393	aio_msync = EIO_MSYNC
		1394	PPCODE:
		1395	{
		1396	STRLEN svlen;
		1397	char *svptr = SvPVbyte (data, svlen);
		1398	UV len = SvUV (length);
		1399
		1400	if (offset < 0)
		1401	offset += svlen;
		1402
		1403	if (offset < 0 || offset > svlen)
		1404	croak ("offset outside of scalar");
		1405
		1406	if (!SvOK (length) || len + offset > svlen)
		1407	len = svlen - offset;
		1408
		1409	{
		1410	dREQ;
		1411
		1412	req->type = ix;
		1413	req->sv2 = SvREFCNT_inc (data);
		1414	req->ptr2 = (char *)svptr + offset;
		1415	req->size = len;
		1416	req->int1 = flags;
		1417
		1418	REQ_SEND;
		1419	}
		1420	}
		1421
		1422	void
		1423	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1424	PPCODE:
		1425	{
		1426	STRLEN svlen;
		1427	char *svptr = SvPVbyte (data, svlen);
		1428	UV len = SvUV (length);
		1429
		1430	if (offset < 0)
		1431	offset += svlen;
		1432
		1433	if (offset < 0 || offset > svlen)
		1434	croak ("offset outside of scalar");
		1435
		1436	if (!SvOK (length) || len + offset > svlen)
		1437	len = svlen - offset;
		1438
		1439	{
		1440	dREQ;
		1441
		1442	req->type = EIO_MLOCK;
		1443	req->sv2 = SvREFCNT_inc (data);
		1444	req->ptr2 = (char *)svptr + offset;
		1445	req->size = len;
		1446
		1447	REQ_SEND;
		1448	}
		1449	}
		1450
		1451	void
		1452	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1453	PPCODE:
		1454	{
		1455	dREQ;
		1456
		1457	req->type = EIO_MLOCKALL;
		1458	req->int1 = flags;
		1459
		1460	REQ_SEND;
		1461	}
		1462
		1463	void
		1464	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1465	PPCODE:
		1466	{
		1467	dREQ;
		1468
		1469	req->type = EIO_BUSY;
		1470	req->nv1 = delay < 0. ? 0. : delay;
		1471
		1472	REQ_SEND;
		1473	}
		1474
		1475	void
		1476	aio_group (SV *callback=&PL_sv_undef)
		1477	PPCODE:
		1478	{
		1479	dREQ;
		1480
		1481	req->type = EIO_GROUP;
		1482
		1483	req_submit (req);
		1484	XPUSHs (req_sv (req, aio_grp_stash));
		1485	}
		1486
		1487	void
		1488	aio_nop (SV *callback=&PL_sv_undef)
		1489	ALIAS:
		1490	aio_nop = EIO_NOP
		1491	aio_sync = EIO_SYNC
		1492	PPCODE:
		1493	{
		1494	dREQ;
		1495
		1496	req->type = ix;
		1497
		1498	REQ_SEND;
		1499	}
		1500
		1501	int
		1502	aioreq_pri (int pri = 0)
746	CODE:	1503	CODE:
		1504	RETVAL = next_pri;
		1505	if (items > 0)
		1506	{
		1507	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1508	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1509	next_pri = pri;
		1510	}
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	void
		1515	aioreq_nice (int nice = 0)
		1516	CODE:
		1517	nice = next_pri - nice;
		1518	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1519	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1520	next_pri = nice;
		1521
		1522	void
		1523	flush ()
		1524	CODE:
747	while (nreqs)	1525	while (eio_nreqs ())
748	{	1526	{
749	poll_wait ();	1527	poll_wait ();
750	poll_cb ();	1528	poll_cb ();
751	}	1529	}
752		1530
753	void	1531	int
754	poll()	1532	poll ()
755	PROTOTYPE:
756	CODE:	1533	CODE:
757	if (nreqs)
758	{
759	poll_wait ();	1534	poll_wait ();
760	poll_cb ();	1535	RETVAL = poll_cb ();
761	}
762
763	int
764	poll_fileno()
765	PROTOTYPE:
766	CODE:
767	RETVAL = respipe [0];
768	OUTPUT:	1536	OUTPUT:
769	RETVAL	1537	RETVAL
770		1538
771	int	1539	int
		1540	poll_fileno ()
		1541	CODE:
		1542	RETVAL = s_epipe_fd (&respipe);
		1543	OUTPUT:
		1544	RETVAL
		1545
		1546	int
772	poll_cb(...)	1547	poll_cb (...)
773	PROTOTYPE:	1548	PROTOTYPE:
774	CODE:	1549	CODE:
775	RETVAL = poll_cb ();	1550	RETVAL = poll_cb ();
776	OUTPUT:	1551	OUTPUT:
777	RETVAL	1552	RETVAL
778		1553
779	void	1554	void
780	poll_wait()	1555	poll_wait ()
781	PROTOTYPE:
782	CODE:	1556	CODE:
783	if (nreqs)
784	poll_wait ();	1557	poll_wait ();
785		1558
786	int	1559	int
787	nreqs()	1560	nreqs ()
788	PROTOTYPE:
789	CODE:	1561	CODE:
790	RETVAL = nreqs;	1562	RETVAL = eio_nreqs ();
791	OUTPUT:	1563	OUTPUT:
792	RETVAL	1564	RETVAL
793		1565
		1566	int
		1567	nready ()
		1568	CODE:
		1569	RETVAL = eio_nready ();
		1570	OUTPUT:
		1571	RETVAL
		1572
		1573	int
		1574	npending ()
		1575	CODE:
		1576	RETVAL = eio_npending ();
		1577	OUTPUT:
		1578	RETVAL
		1579
		1580	int
		1581	nthreads ()
		1582	CODE:
		1583	RETVAL = eio_nthreads ();
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	int
		1588	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1589	CODE:
		1590	RETVAL = posix_fadvise (fh, offset, length, advice);
		1591	OUTPUT:
		1592	RETVAL
		1593
		1594	IV
		1595	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1596	CODE:
		1597	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	void
		1602	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1603	PPCODE:
		1604	sv_unmagic (scalar, MMAP_MAGIC);
		1605	{
		1606	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1607	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1608	if (addr == (void *)-1)
		1609	XSRETURN_NO;
		1610
		1611	sv_force_normal (scalar);
		1612
		1613	/* we store the length in mg_obj, as namlen is I32 :/ */
		1614	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1615	->mg_obj = (SV *)length;
		1616
		1617	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1618
		1619	if (!(prot & PROT_WRITE))
		1620	SvREADONLY_on (scalar);
		1621
		1622	if (SvLEN (scalar))
		1623	Safefree (SvPVX (scalar));
		1624
		1625	SvPVX (scalar) = (char *)addr;
		1626	SvCUR_set (scalar, length);
		1627	SvLEN_set (scalar, 0);
		1628	SvPOK_only (scalar);
		1629
		1630	XSRETURN_YES;
		1631	}
		1632
		1633	void
		1634	munmap (SV *scalar)
		1635	CODE:
		1636	sv_unmagic (scalar, MMAP_MAGIC);
		1637
		1638	int
		1639	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1640	ALIAS:
		1641	mprotect = 1
		1642	CODE:
		1643	{
		1644	STRLEN svlen;
		1645	void *addr = SvPVbyte (scalar, svlen);
		1646	size_t len = SvUV (length);
		1647
		1648	if (offset < 0)
		1649	offset += svlen;
		1650
		1651	if (offset < 0 || offset > svlen)
		1652	croak ("offset outside of scalar");
		1653
		1654	if (!SvOK (length) || len + offset > svlen)
		1655	len = svlen - offset;
		1656
		1657	addr = (void *)(((intptr_t)addr) + offset);
		1658	eio_page_align (&addr, &len);
		1659
		1660	switch (ix)
		1661	{
		1662	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1663	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1664	}
		1665	}
		1666	OUTPUT:
		1667	RETVAL
		1668
		1669	int
		1670	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1671	CODE:
		1672	{
		1673	STRLEN svlen;
		1674	void *addr = SvPVbyte (scalar, svlen);
		1675	size_t len = SvUV (length);
		1676
		1677	if (offset < 0)
		1678	offset += svlen;
		1679
		1680	if (offset < 0 || offset > svlen)
		1681	croak ("offset outside of scalar");
		1682
		1683	if (!SvOK (length) || len + offset > svlen)
		1684	len = svlen - offset;
		1685
		1686	addr = (void *)(((intptr_t)addr) + offset);
		1687	eio_page_align (&addr, &len);
		1688	#if _POSIX_MEMLOCK_RANGE
		1689	RETVAL = munlock (addr, len);
		1690	#else
		1691	RETVAL = ((errno = ENOSYS), -1);
		1692	#endif
		1693	}
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	int
		1698	munlockall ()
		1699	CODE:
		1700	#if _POSIX_MEMLOCK
		1701	munlockall ();
		1702	#else
		1703	RETVAL = -1;
		1704	errno = ENOSYS;
		1705	#endif
		1706	OUTPUT:
		1707	RETVAL
		1708
		1709	void _on_next_submit (SV *cb)
		1710	CODE:
		1711	SvREFCNT_dec (on_next_submit);
		1712	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1713
		1714	PROTOTYPES: DISABLE
		1715
		1716	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1717
		1718	void
		1719	cancel (aio_req_ornot req)
		1720	CODE:
		1721	eio_cancel (req);
		1722
		1723	void
		1724	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1725	PPCODE:
		1726	{
		1727	if (GIMME_V != G_VOID)
		1728	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1729
		1730	if (items > 1)
		1731	{
		1732	SV *cb_cv =get_cb (callback);
		1733
		1734	SvREFCNT_dec (req->callback);
		1735	req->callback = SvREFCNT_inc (cb_cv);
		1736	}
		1737	}
		1738
		1739	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1740
		1741	void
		1742	add (aio_req grp, ...)
		1743	PPCODE:
		1744	{
		1745	int i;
		1746
		1747	if (grp->int1 == 2)
		1748	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1749
		1750	for (i = 1; i < items; ++i )
		1751	{
		1752	aio_req req;
		1753
		1754	if (GIMME_V != G_VOID)
		1755	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1756
		1757	req = SvAIO_REQ (ST (i));
		1758
		1759	if (req)
		1760	eio_grp_add (grp, req);
		1761	}
		1762	}
		1763
		1764	void
		1765	cancel_subs (aio_req_ornot req)
		1766	CODE:
		1767	req_cancel_subs (req);
		1768
		1769	void
		1770	result (aio_req grp, ...)
		1771	CODE:
		1772	{
		1773	int i;
		1774	AV *av;
		1775
		1776	grp->errorno = errno;
		1777
		1778	av = newAV ();
		1779	av_extend (av, items - 1);
		1780
		1781	for (i = 1; i < items; ++i )
		1782	av_push (av, newSVsv (ST (i)));
		1783
		1784	SvREFCNT_dec (grp->sv1);
		1785	grp->sv1 = (SV *)av;
		1786	}
		1787
		1788	void
		1789	errno (aio_req grp, int errorno = errno)
		1790	CODE:
		1791	grp->errorno = errorno;
		1792
		1793	void
		1794	limit (aio_req grp, int limit)
		1795	CODE:
		1796	eio_grp_limit (grp, limit);
		1797
		1798	void
		1799	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1800	CODE:
		1801	{
		1802	SvREFCNT_dec (grp->sv2);
		1803	grp->sv2 = newSVsv (callback);
		1804	grp->feed = aio_grp_feed;
		1805
		1806	if (grp->int2 <= 0)
		1807	grp->int2 = 2;
		1808
		1809	eio_grp_limit (grp, grp->int2);
		1810	}
		1811

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