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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC vs.
Revision 1.190 by root, Mon Jul 18 02:02:26 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;	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_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		340
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	341	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	342	static void req_cancel (aio_req req);
72		343
73	static void	344	static void want_poll (void)
74	poll_wait ()
75	{	345	{
76	if (nreqs && !ress)	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	{
		359	if (!req->self)
77	{	360	{
78	fd_set rfd;	361	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	363	}
84	}
85		364
86	static int	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
87	poll_cb ()	366	}
88	{
89	dSP;
90	int count = 0;
91	aio_req req, prv;
92		367
93	pthread_mutex_lock (&reslock);	368	static aio_req SvAIO_REQ (SV *sv)
		369	{
		370	MAGIC *mg;
94		371
95	{	372	if (!SvROK (sv)
96	/* read any signals sent by the worker threads */	373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
97	char buf [32];	374	&& SvSTASH (SvRV (sv)) != aio_req_stash
98	while (read (respipe [0], buf, 32) == 32)	375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
99	;	376	croak ("object of class IO::AIO::REQ expected");
100	}
101		377
102	req = ress;	378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
103	ress = rese = 0;
104		379
105	pthread_mutex_unlock (&reslock);	380	return mg ? (aio_req)mg->mg_ptr : 0;
		381	}
106		382
107	while (req)	383	static void aio_grp_feed (aio_req grp)
		384	{
		385	if (grp->sv2 && SvOK (grp->sv2))
108	{	386	{
109	nreqs--;	387	dSP;
110		388
111	if (req->type == REQ_QUIT)	389	ENTER;
112	started--;	390	SAVETMPS;
113	else	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))
114	{	436	{
115	int errorno = errno;	437	sv_result = sv_result_cache; sv_result_cache = 0;
116	errno = req->errorno;	438	SvIV_set (sv_result, req->result);
117		439	SvIOK_only (sv_result);
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}
136
137	ENTER;
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140
141	if (req->type == REQ_OPEN)
142	{
143	/* convert fd to fh */
144	SV *fh;
145
146	PUTBACK;
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148	SPAGAIN;
149
150	fh = SvREFCNT_inc (POPs);
151
152	PUSHMARK (SP);
153	XPUSHs (sv_2mortal (fh));
154	}
155
156	if (SvOK (req->callback))
157	{
158	PUTBACK;
159	call_sv (req->callback, G_VOID | G_EVAL);
160	SPAGAIN;
161	}
162
163	LEAVE;
164
165	if (req->callback)
166	SvREFCNT_dec (req->callback);
167
168	errno = errorno;
169	count++;
170	}
171
172	prv = req;
173	req = req->next;
174	Safefree (prv);
175
176	/* TODO: croak on errors? */
177	}
178
179	return count;
180	}
181
182	static void *aio_proc(void *arg);
183
184	static void
185	start_thread (void)
186	{
187	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	pthread_attr_t attr;
190
191	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
194
195	sigfillset (&fullsigset);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197
198	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
199	started++;
200
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);
202	}
203
204	static void
205	send_req (aio_req req)
206	{
207	nreqs++;
208
209	pthread_mutex_lock (&reqlock);
210
211	req->next = 0;
212
213	if (reqe)
214	{
215	reqe->next = req;
216	reqe = req;
217	}
218	else
219	reqe = reqs = req;
220
221	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);
223
224	while (nreqs > max_outstanding)
225	{
226	poll_wait ();
227	poll_cb ();
228	}
229	}
230
231	static void
232	end_thread (void)
233	{
234	aio_req req;
235	New (0, req, 1, aio_cb);
236	req->type = REQ_QUIT;
237
238	send_req (req);
239	}
240
241
242	static void min_parallel (int nthreads)
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}
278
279	max_parallel (0);
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}
298
299	static void atfork_parent (void)
300	{
301	pthread_mutex_unlock (&reslock);
302	min_parallel (fork_started);
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306
307	static void atfork_child (void)
308	{
309	reqs = reqe = 0;
310
311	atfork_parent ();
312	}
313
314	/*****************************************************************************/
315	/* work around various missing functions */
316
317	#if !HAVE_PREADWRITE
318	# define pread aio_pread
319	# define pwrite aio_pwrite
320
321	/*
322	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.
325	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
327
328	static ssize_t
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{
331	ssize_t res;
332	off_t ooffset;
333
334	pthread_mutex_lock (&iolock);
335	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);
340
341	return res;
342	}
343
344	static ssize_t
345	pwrite (int fd, void *buf, size_t count, off_t offset)
346	{
347	ssize_t res;
348	off_t ooffset;
349
350	pthread_mutex_lock (&iolock);
351	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);
356
357	return res;
358	}
359	#endif
360
361	#if !HAVE_FDATASYNC
362	# define fdatasync fsync
363	#endif
364
365	#if !HAVE_READAHEAD
366	# define readahead aio_readahead
367
368	static char readahead_buf[4096];
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)
372	{
373	while (count > 0)
374	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376
377	pread (fd, readahead_buf, len, offset);
378	offset += len;
379	count -= len;
380	}
381
382	errno = 0;
383	}
384	#endif
385
386	/*****************************************************************************/
387
388	static void *
389	aio_proc (void *thr_arg)
390	{
391	aio_req req;
392	int type;
393
394	do
395	{
396	pthread_mutex_lock (&reqlock);
397
398	for (;;)
399	{
400	req = reqs;
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407
408	if (req)
409	break;
410
411	pthread_cond_wait (&reqwait, &reqlock);
412	}
413
414	pthread_mutex_unlock (&reqlock);
415
416	errno = 0; /* strictly unnecessary */
417
418	type = req->type;
419
420	switch (type)
421	{
422	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
423	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424
425	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
426
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430
431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	case REQ_FSYNC: req->result = fsync (req->fd); break;
439
440	case REQ_QUIT:
441	break;
442
443	default:
444	req->result = ENOSYS;
445	break;
446	}
447
448	req->errorno = errno;
449
450	pthread_mutex_lock (&reslock);
451
452	req->next = 0;
453
454	if (rese)
455	{
456	rese->next = req;
457	rese = req;
458	}	440	}
459	else	441	else
460	{	442	{
461	rese = ress = req;	443	sv_result = newSViv (req->result);
462		444	SvREADONLY_on (sv_result);
463	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);
465	}	445	}
466		446
467	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;
468	}	642	}
469	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);
470		757
471	return 0;	758	return 0;
472	}	759	}
473		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
474	#define dREQ \	773	#define dREQ \
		774	SV *cb_cv; \
475	aio_req req; \	775	aio_req req; \
		776	int req_pri = next_pri; \
		777	next_pri = EIO_PRI_DEFAULT; \
476	\	778	\
477	if (SvOK (callback) && !SvROK (callback)) \	779	cb_cv = get_cb (callback); \
478	croak ("clalback must be undef or of reference type"); \
479	\	780	\
480	Newz (0, req, 1, aio_cb); \	781	Newz (0, req, 1, eio_req); \
481	if (!req) \	782	if (!req) \
482	croak ("out of memory during aio_req allocation"); \	783	croak ("out of memory during eio_req allocation"); \
483	\	784	\
484	req->callback = SvREFCNT_inc (callback);	785	req->callback = SvREFCNT_inc (cb_cv); \
485		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
486	MODULE = IO::AIO PACKAGE = IO::AIO	796	MODULE = IO::AIO PACKAGE = IO::AIO
487		797
488	PROTOTYPES: ENABLE	798	PROTOTYPES: ENABLE
489		799
490	BOOT:	800	BOOT:
491	{	801	{
492	if (pipe (respipe))	802	static const struct {
493	croak ("unable to initialize result pipe");	803	const char *name;
		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)
494		818
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	819	const_iv (O_ASYNC)
496	croak ("cannot set result pipe to nonblocking mode");	820	const_iv (O_DIRECT)
		821	const_iv (O_NOATIME)
497		822
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	823	const_iv (O_CLOEXEC)
499	croak ("cannot set result pipe to nonblocking mode");	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)
500		834
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	835	const_iv (S_IFIFO)
502	}	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)
503		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
504	void	931	void
505	min_parallel(nthreads)	932	reinit ()
506	int nthreads	933	PROTOTYPE:
		934	CODE:
		935	reinit ();
		936
		937	void
		938	max_poll_reqs (unsigned int nreqs)
507	PROTOTYPE: $	939	PROTOTYPE: $
		940	CODE:
		941	eio_set_max_poll_reqs (nreqs);
508		942
509	void	943	void
510	max_parallel(nthreads)	944	max_poll_time (double nseconds)
511	int nthreads
512	PROTOTYPE: $	945	PROTOTYPE: $
513
514	int
515	max_outstanding(nreqs)
516	int nreqs
517	PROTOTYPE: $
518	CODE:	946	CODE:
519	RETVAL = max_outstanding;	947	eio_set_max_poll_time (nseconds);
		948
		949	void
		950	min_parallel (unsigned int nthreads)
		951	PROTOTYPE: $
		952	CODE:
		953	eio_set_min_parallel (nthreads);
		954
		955	void
		956	max_parallel (unsigned int nthreads)
		957	PROTOTYPE: $
		958	CODE:
		959	eio_set_max_parallel (nthreads);
		960
		961	void
		962	max_idle (unsigned int nthreads)
		963	PROTOTYPE: $
		964	CODE:
		965	eio_set_max_idle (nthreads);
		966
		967	void
		968	idle_timeout (unsigned int seconds)
		969	PROTOTYPE: $
		970	CODE:
		971	eio_set_idle_timeout (seconds);
		972
		973	void
		974	max_outstanding (unsigned int maxreqs)
		975	PROTOTYPE: $
		976	CODE:
520	max_outstanding = nreqs;	977	max_outstanding = maxreqs;
521		978
522	void	979	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	980	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
524	SV * pathname
525	int flags
526	int mode
527	SV * callback
528	PROTOTYPE: $$$;$
529	CODE:	981	PPCODE:
530	{	982	{
531	dREQ;	983	dREQ;
532		984
533	req->type = REQ_OPEN;	985	req->type = EIO_OPEN;
534	req->data = newSVsv (pathname);	986	req->sv1 = newSVsv (pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);	987	req->ptr1 = SvPVbyte_nolen (req->sv1);
536	req->fd = flags;	988	req->int1 = flags;
537	req->mode = mode;	989	req->int2 = mode;
538		990
539	send_req (req);	991	REQ_SEND;
540	}	992	}
541		993
542	void	994	void
543	aio_close(fh,callback=&PL_sv_undef)	995	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
544	SV * fh
545	SV * callback
546	PROTOTYPE: $;$
547	ALIAS:	996	ALIAS:
548	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	997	aio_fsync = EIO_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	998	aio_fdatasync = EIO_FDATASYNC
551	CODE:	999	PPCODE:
552	{	1000	{
		1001	int fd = s_fileno_croak (fh, 0);
553	dREQ;	1002	dREQ;
554		1003
555	req->type = ix;	1004	req->type = ix;
556	req->fh = newSVsv (fh);	1005	req->sv1 = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1006	req->int1 = fd;
558		1007
559	send_req (req);	1008	REQ_SEND (req);
560	}	1009	}
561		1010
562	void	1011	void
		1012	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1013	PPCODE:
		1014	{
		1015	int fd = s_fileno_croak (fh, 0);
		1016	dREQ;
		1017
		1018	req->type = EIO_SYNC_FILE_RANGE;
		1019	req->sv1 = newSVsv (fh);
		1020	req->int1 = fd;
		1021	req->offs = offset;
		1022	req->size = nbytes;
		1023	req->int2 = flags;
		1024
		1025	REQ_SEND (req);
		1026	}
		1027
		1028	void
		1029	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1030	PPCODE:
		1031	{
		1032	int fd = s_fileno_croak (fh, 0);
		1033	dREQ;
		1034
		1035	req->type = EIO_FALLOCATE;
		1036	req->sv1 = newSVsv (fh);
		1037	req->int1 = fd;
		1038	req->int2 = mode;
		1039	req->offs = offset;
		1040	req->size = len;
		1041
		1042	REQ_SEND (req);
		1043	}
		1044
		1045	void
		1046	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1047	PPCODE:
		1048	{
		1049	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1050	int fd = s_fileno_croak (fh, 0);
		1051	dREQ;
		1052
		1053	if (expect_false (close_fd < 0))
		1054	{
		1055	int pipefd [2];
		1056
		1057	if (
		1058	#ifdef _WIN32
		1059	_pipe (pipefd, 1, _O_BINARY) < 0
		1060	#else
		1061	pipe (pipefd) < 0
		1062	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1063	#endif
		1064	|| close (pipefd [1]) < 0
		1065	)
		1066	abort (); /*D*/
		1067
		1068	close_fd = pipefd [0];
		1069	}
		1070
		1071	req->type = EIO_DUP2;
		1072	req->int1 = close_fd;
		1073	req->sv2 = newSVsv (fh);
		1074	req->int2 = fd;
		1075
		1076	REQ_SEND (req);
		1077	}
		1078
		1079	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1080	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
564	SV * fh
565	UV offset
566	IV length
567	SV * data
568	IV dataoffset
569	SV * callback
570	ALIAS:	1081	ALIAS:
571	aio_read = REQ_READ	1082	aio_read = EIO_READ
572	aio_write = REQ_WRITE	1083	aio_write = EIO_WRITE
573	PROTOTYPE: $$$$$;$
574	CODE:	1084	PPCODE:
575	{	1085	{
576	aio_req req;
577	STRLEN svlen;	1086	STRLEN svlen;
		1087	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
578	char *svptr = SvPVbyte (data, svlen);	1088	char *svptr = SvPVbyte (data, svlen);
579		1089	UV len = SvUV (length);
580	SvUPGRADE (data, SVt_PV);
581	SvPOK_on (data);
582		1090
583	if (dataoffset < 0)	1091	if (dataoffset < 0)
584	dataoffset += svlen;	1092	dataoffset += svlen;
585		1093
586	if (dataoffset < 0 || dataoffset > svlen)	1094	if (dataoffset < 0 || dataoffset > svlen)
587	croak ("data offset outside of string");	1095	croak ("dataoffset outside of data scalar");
588		1096
589	if (ix == REQ_WRITE)	1097	if (ix == EIO_WRITE)
590	{	1098	{
591	/* write: check length and adjust. */	1099	/* write: check length and adjust. */
592	if (length < 0 || length + dataoffset > svlen)	1100	if (!SvOK (length) || len + dataoffset > svlen)
593	length = svlen - dataoffset;	1101	len = svlen - dataoffset;
594	}	1102	}
595	else	1103	else
596	{	1104	{
597	/* read: grow scalar as necessary */	1105	/* read: check type and grow scalar as necessary */
		1106	SvUPGRADE (data, SVt_PV);
598	svptr = SvGROW (data, length + dataoffset);	1107	svptr = SvGROW (data, len + dataoffset + 1);
599	}	1108	}
600
601	if (length < 0)
602	croak ("length must not be negative");
603		1109
604	{	1110	{
605	dREQ;	1111	dREQ;
606		1112
607	req->type = ix;	1113	req->type = ix;
608	req->fh = newSVsv (fh);	1114	req->sv1 = newSVsv (fh);
609	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1115	req->int1 = fd;
610	: IoOFP (sv_2io (fh)));	1116	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
611	req->offset = offset;	1117	req->size = len;
612	req->length = length;
613	req->data = SvREFCNT_inc (data);	1118	req->sv2 = SvREFCNT_inc (data);
614	req->dataptr = (char *)svptr + dataoffset;	1119	req->ptr2 = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);	1120	req->stroffset = dataoffset;
616		1121
617	send_req (req);	1122	if (!SvREADONLY (data))
		1123	{
		1124	SvREADONLY_on (data);
		1125	req->flags |= FLAG_SV2_RO_OFF;
		1126	}
		1127
		1128	REQ_SEND;
618	}	1129	}
619	}	1130	}
620		1131
621	void	1132	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1133	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
623	SV * fh	1134	ALIAS:
624	UV offset	1135	aio_readlink = EIO_READLINK
625	IV length	1136	aio_realpath = EIO_REALPATH
626	SV * callback
627	PROTOTYPE: $$$;$
628	CODE:	1137	PPCODE:
629	{	1138	{
		1139	dREQ;
		1140
		1141	req->type = ix;
		1142	req->sv1 = newSVsv (path);
		1143	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1144
		1145	REQ_SEND;
		1146	}
		1147
		1148	void
		1149	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1150	PPCODE:
		1151	{
		1152	int ifd = s_fileno_croak (in_fh , 0);
		1153	int ofd = s_fileno_croak (out_fh, 1);
630	dREQ;	1154	dREQ;
631		1155
		1156	req->type = EIO_SENDFILE;
		1157	req->sv1 = newSVsv (out_fh);
		1158	req->int1 = ofd;
		1159	req->sv2 = newSVsv (in_fh);
		1160	req->int2 = ifd;
		1161	req->offs = in_offset;
		1162	req->size = length;
		1163
		1164	REQ_SEND;
		1165	}
		1166
		1167	void
		1168	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1169	PPCODE:
		1170	{
		1171	int fd = s_fileno_croak (fh, 0);
		1172	dREQ;
		1173
632	req->type = REQ_READAHEAD;	1174	req->type = EIO_READAHEAD;
633	req->fh = newSVsv (fh);	1175	req->sv1 = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1176	req->int1 = fd;
635	req->offset = offset;	1177	req->offs = offset;
636	req->length = length;	1178	req->size = length;
637		1179
638	send_req (req);	1180	REQ_SEND;
639	}	1181	}
640		1182
641	void	1183	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)	1184	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
643	SV * fh_or_path
644	SV * callback
645	ALIAS:	1185	ALIAS:
646	aio_stat = REQ_STAT	1186	aio_stat = EIO_STAT
647	aio_lstat = REQ_LSTAT	1187	aio_lstat = EIO_LSTAT
		1188	aio_statvfs = EIO_STATVFS
648	CODE:	1189	PPCODE:
649	{	1190	{
650	dREQ;	1191	dREQ;
651		1192
652	New (0, req->statdata, 1, Stat_t);	1193	req->sv1 = newSVsv (fh_or_path);
653	if (!req->statdata)
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
655		1194
656	if (SvPOK (fh_or_path))	1195	if (SvPOK (req->sv1))
657	{	1196	{
658	req->type = ix;	1197	req->type = ix;
659	req->data = newSVsv (fh_or_path);
660	req->dataptr = SvPVbyte_nolen (req->data);	1198	req->ptr1 = SvPVbyte_nolen (req->sv1);
661	}	1199	}
662	else	1200	else
663	{	1201	{
664	req->type = REQ_FSTAT;	1202	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
665	req->fh = newSVsv (fh_or_path);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1203	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667	}	1204	}
668		1205
669	send_req (req);	1206	REQ_SEND;
670	}	1207	}
671		1208
		1209	UV
		1210	major (UV dev)
		1211	ALIAS:
		1212	minor = 1
		1213	CODE:
		1214	RETVAL = ix ? major (dev) : minor (dev);
		1215	OUTPUT:
		1216	RETVAL
		1217
		1218	UV
		1219	makedev (UV maj, UV min)
		1220	CODE:
		1221	RETVAL = makedev (maj, min);
		1222	OUTPUT:
		1223	RETVAL
		1224
672	void	1225	void
		1226	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1227	PPCODE:
		1228	{
		1229	dREQ;
		1230
		1231	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1232	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1233	req->sv1 = newSVsv (fh_or_path);
		1234
		1235	if (SvPOK (req->sv1))
		1236	{
		1237	req->type = EIO_UTIME;
		1238	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1239	}
		1240	else
		1241	{
		1242	req->type = EIO_FUTIME;
		1243	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1244	}
		1245
		1246	REQ_SEND;
		1247	}
		1248
		1249	void
		1250	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1251	PPCODE:
		1252	{
		1253	dREQ;
		1254
		1255	req->sv1 = newSVsv (fh_or_path);
		1256	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1257
		1258	if (SvPOK (req->sv1))
		1259	{
		1260	req->type = EIO_TRUNCATE;
		1261	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1262	}
		1263	else
		1264	{
		1265	req->type = EIO_FTRUNCATE;
		1266	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1267	}
		1268
		1269	REQ_SEND;
		1270	}
		1271
		1272	void
		1273	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1274	ALIAS:
		1275	aio_chmod = EIO_CHMOD
		1276	aio_mkdir = EIO_MKDIR
		1277	PPCODE:
		1278	{
		1279	dREQ;
		1280
		1281	req->int2 = mode;
		1282	req->sv1 = newSVsv (fh_or_path);
		1283
		1284	if (SvPOK (req->sv1))
		1285	{
		1286	req->type = ix;
		1287	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1288	}
		1289	else
		1290	{
		1291	req->type = EIO_FCHMOD;
		1292	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1293	}
		1294
		1295	REQ_SEND;
		1296	}
		1297
		1298	void
		1299	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1300	PPCODE:
		1301	{
		1302	dREQ;
		1303
		1304	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1305	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1306	req->sv1 = newSVsv (fh_or_path);
		1307
		1308	if (SvPOK (req->sv1))
		1309	{
		1310	req->type = EIO_CHOWN;
		1311	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1312	}
		1313	else
		1314	{
		1315	req->type = EIO_FCHOWN;
		1316	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1317	}
		1318
		1319	REQ_SEND;
		1320	}
		1321
		1322	void
		1323	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1324	PPCODE:
		1325	{
		1326	dREQ;
		1327
		1328	req->type = EIO_READDIR;
		1329	req->sv1 = newSVsv (pathname);
		1330	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1331	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1332
		1333	if (flags & EIO_READDIR_DENTS)
		1334	req->int1 |= EIO_READDIR_CUSTOM2;
		1335
		1336	REQ_SEND;
		1337	}
		1338
		1339	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	1340	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
674	SV * pathname
675	SV * callback
676	ALIAS:	1341	ALIAS:
677	aio_unlink = REQ_UNLINK	1342	aio_unlink = EIO_UNLINK
678	aio_rmdir = REQ_RMDIR	1343	aio_rmdir = EIO_RMDIR
		1344	aio_readdir = EIO_READDIR
679	CODE:	1345	PPCODE:
680	{	1346	{
681	dREQ;	1347	dREQ;
682		1348
683	req->type = ix;	1349	req->type = ix;
684	req->data = newSVsv (pathname);	1350	req->sv1 = newSVsv (pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);	1351	req->ptr1 = SvPVbyte_nolen (req->sv1);
686
687	send_req (req);
688	}
689		1352
		1353	REQ_SEND;
		1354	}
		1355
690	void	1356	void
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1357	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
692	SV * oldpath	1358	ALIAS:
693	SV * newpath	1359	aio_link = EIO_LINK
694	SV * callback	1360	aio_symlink = EIO_SYMLINK
		1361	aio_rename = EIO_RENAME
695	CODE:	1362	PPCODE:
696	{	1363	{
697	dREQ;	1364	dREQ;
698		1365
699	req->type = REQ_SYMLINK;	1366	req->type = ix;
700	req->fh = newSVsv (oldpath);	1367	req->sv1 = newSVsv (oldpath);
701	req->data2ptr = SvPVbyte_nolen (req->fh);	1368	req->ptr1 = SvPVbyte_nolen (req->sv1);
702	req->data = newSVsv (newpath);	1369	req->sv2 = newSVsv (newpath);
703	req->dataptr = SvPVbyte_nolen (req->data);	1370	req->ptr2 = SvPVbyte_nolen (req->sv2);
704		1371
705	send_req (req);	1372	REQ_SEND;
706	}	1373	}
707		1374
708	void	1375	void
		1376	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1377	PPCODE:
		1378	{
		1379	dREQ;
		1380
		1381	req->type = EIO_MKNOD;
		1382	req->sv1 = newSVsv (pathname);
		1383	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1384	req->int2 = (mode_t)mode;
		1385	req->offs = dev;
		1386
		1387	REQ_SEND;
		1388	}
		1389
		1390	void
		1391	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1392	ALIAS:
		1393	aio_mtouch = EIO_MTOUCH
		1394	aio_msync = EIO_MSYNC
		1395	PPCODE:
		1396	{
		1397	STRLEN svlen;
		1398	char *svptr = SvPVbyte (data, svlen);
		1399	UV len = SvUV (length);
		1400
		1401	if (offset < 0)
		1402	offset += svlen;
		1403
		1404	if (offset < 0 || offset > svlen)
		1405	croak ("offset outside of scalar");
		1406
		1407	if (!SvOK (length) || len + offset > svlen)
		1408	len = svlen - offset;
		1409
		1410	{
		1411	dREQ;
		1412
		1413	req->type = ix;
		1414	req->sv2 = SvREFCNT_inc (data);
		1415	req->ptr2 = (char *)svptr + offset;
		1416	req->size = len;
		1417	req->int1 = flags;
		1418
		1419	REQ_SEND;
		1420	}
		1421	}
		1422
		1423	void
		1424	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1425	PPCODE:
		1426	{
		1427	STRLEN svlen;
		1428	char *svptr = SvPVbyte (data, svlen);
		1429	UV len = SvUV (length);
		1430
		1431	if (offset < 0)
		1432	offset += svlen;
		1433
		1434	if (offset < 0 || offset > svlen)
		1435	croak ("offset outside of scalar");
		1436
		1437	if (!SvOK (length) || len + offset > svlen)
		1438	len = svlen - offset;
		1439
		1440	{
		1441	dREQ;
		1442
		1443	req->type = EIO_MLOCK;
		1444	req->sv2 = SvREFCNT_inc (data);
		1445	req->ptr2 = (char *)svptr + offset;
		1446	req->size = len;
		1447
		1448	REQ_SEND;
		1449	}
		1450	}
		1451
		1452	void
		1453	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1454	PPCODE:
		1455	{
		1456	dREQ;
		1457
		1458	req->type = EIO_MLOCKALL;
		1459	req->int1 = flags;
		1460
		1461	REQ_SEND;
		1462	}
		1463
		1464	void
		1465	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1466	PPCODE:
		1467	{
		1468	dREQ;
		1469
		1470	req->type = EIO_BUSY;
		1471	req->nv1 = delay < 0. ? 0. : delay;
		1472
		1473	REQ_SEND;
		1474	}
		1475
		1476	void
		1477	aio_group (SV *callback=&PL_sv_undef)
		1478	PPCODE:
		1479	{
		1480	dREQ;
		1481
		1482	req->type = EIO_GROUP;
		1483
		1484	req_submit (req);
		1485	XPUSHs (req_sv (req, aio_grp_stash));
		1486	}
		1487
		1488	void
		1489	aio_nop (SV *callback=&PL_sv_undef)
		1490	ALIAS:
		1491	aio_nop = EIO_NOP
		1492	aio_sync = EIO_SYNC
		1493	PPCODE:
		1494	{
		1495	dREQ;
		1496
		1497	req->type = ix;
		1498
		1499	REQ_SEND;
		1500	}
		1501
		1502	int
		1503	aioreq_pri (int pri = 0)
		1504	CODE:
		1505	RETVAL = next_pri;
		1506	if (items > 0)
		1507	{
		1508	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1509	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1510	next_pri = pri;
		1511	}
		1512	OUTPUT:
		1513	RETVAL
		1514
		1515	void
		1516	aioreq_nice (int nice = 0)
		1517	CODE:
		1518	nice = next_pri - nice;
		1519	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1520	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1521	next_pri = nice;
		1522
		1523	void
709	flush()	1524	flush ()
710	PROTOTYPE:
711	CODE:	1525	CODE:
712	while (nreqs)	1526	while (eio_nreqs ())
713	{	1527	{
714	poll_wait ();	1528	poll_wait ();
715	poll_cb ();	1529	poll_cb ();
716	}	1530	}
717		1531
718	void
719	poll()
720	PROTOTYPE:
721	CODE:
722	if (nreqs)
723	{
724	poll_wait ();
725	poll_cb ();
726	}
727
728	int	1532	int
729	poll_fileno()	1533	poll ()
730	PROTOTYPE:
731	CODE:	1534	CODE:
732	RETVAL = respipe [0];	1535	poll_wait ();
733	OUTPUT:
734	RETVAL
735
736	int
737	poll_cb(...)
738	PROTOTYPE:
739	CODE:
740	RETVAL = poll_cb ();	1536	RETVAL = poll_cb ();
741	OUTPUT:	1537	OUTPUT:
742	RETVAL	1538	RETVAL
743		1539
744	void
745	poll_wait()
746	PROTOTYPE:
747	CODE:
748	if (nreqs)
749	poll_wait ();
750
751	int	1540	int
752	nreqs()	1541	poll_fileno ()
753	PROTOTYPE:
754	CODE:	1542	CODE:
755	RETVAL = nreqs;	1543	RETVAL = s_epipe_fd (&respipe);
756	OUTPUT:	1544	OUTPUT:
757	RETVAL	1545	RETVAL
758		1546
		1547	int
		1548	poll_cb (...)
		1549	PROTOTYPE:
		1550	CODE:
		1551	RETVAL = poll_cb ();
		1552	OUTPUT:
		1553	RETVAL
		1554
		1555	void
		1556	poll_wait ()
		1557	CODE:
		1558	poll_wait ();
		1559
		1560	int
		1561	nreqs ()
		1562	CODE:
		1563	RETVAL = eio_nreqs ();
		1564	OUTPUT:
		1565	RETVAL
		1566
		1567	int
		1568	nready ()
		1569	CODE:
		1570	RETVAL = eio_nready ();
		1571	OUTPUT:
		1572	RETVAL
		1573
		1574	int
		1575	npending ()
		1576	CODE:
		1577	RETVAL = eio_npending ();
		1578	OUTPUT:
		1579	RETVAL
		1580
		1581	int
		1582	nthreads ()
		1583	CODE:
		1584	RETVAL = eio_nthreads ();
		1585	OUTPUT:
		1586	RETVAL
		1587
		1588	int
		1589	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1590	CODE:
		1591	RETVAL = posix_fadvise (fh, offset, length, advice);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595	ssize_t
		1596	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1597	CODE:
		1598	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	void
		1603	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1604	PPCODE:
		1605	sv_unmagic (scalar, MMAP_MAGIC);
		1606	{
		1607	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1608	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1609	if (addr == (void *)-1)
		1610	XSRETURN_NO;
		1611
		1612	sv_force_normal (scalar);
		1613
		1614	/* we store the length in mg_obj, as namlen is I32 :/ */
		1615	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1616	->mg_obj = (SV *)length;
		1617
		1618	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1619
		1620	if (!(prot & PROT_WRITE))
		1621	SvREADONLY_on (scalar);
		1622
		1623	if (SvLEN (scalar))
		1624	Safefree (SvPVX (scalar));
		1625
		1626	SvPVX (scalar) = (char *)addr;
		1627	SvCUR_set (scalar, length);
		1628	SvLEN_set (scalar, 0);
		1629	SvPOK_only (scalar);
		1630
		1631	XSRETURN_YES;
		1632	}
		1633
		1634	void
		1635	munmap (SV *scalar)
		1636	CODE:
		1637	sv_unmagic (scalar, MMAP_MAGIC);
		1638
		1639	int
		1640	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1641	ALIAS:
		1642	mprotect = 1
		1643	CODE:
		1644	{
		1645	STRLEN svlen;
		1646	void *addr = SvPVbyte (scalar, svlen);
		1647	size_t len = SvUV (length);
		1648
		1649	if (offset < 0)
		1650	offset += svlen;
		1651
		1652	if (offset < 0 || offset > svlen)
		1653	croak ("offset outside of scalar");
		1654
		1655	if (!SvOK (length) || len + offset > svlen)
		1656	len = svlen - offset;
		1657
		1658	addr = (void *)(((intptr_t)addr) + offset);
		1659	eio_page_align (&addr, &len);
		1660
		1661	switch (ix)
		1662	{
		1663	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1664	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1665	}
		1666	}
		1667	OUTPUT:
		1668	RETVAL
		1669
		1670	int
		1671	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1672	CODE:
		1673	{
		1674	STRLEN svlen;
		1675	void *addr = SvPVbyte (scalar, svlen);
		1676	size_t len = SvUV (length);
		1677
		1678	if (offset < 0)
		1679	offset += svlen;
		1680
		1681	if (offset < 0 || offset > svlen)
		1682	croak ("offset outside of scalar");
		1683
		1684	if (!SvOK (length) || len + offset > svlen)
		1685	len = svlen - offset;
		1686
		1687	addr = (void *)(((intptr_t)addr) + offset);
		1688	eio_page_align (&addr, &len);
		1689	#if _POSIX_MEMLOCK_RANGE
		1690	RETVAL = munlock (addr, len);
		1691	#else
		1692	RETVAL = ((errno = ENOSYS), -1);
		1693	#endif
		1694	}
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	int
		1699	munlockall ()
		1700	CODE:
		1701	#if _POSIX_MEMLOCK
		1702	munlockall ();
		1703	#else
		1704	RETVAL = -1;
		1705	errno = ENOSYS;
		1706	#endif
		1707	OUTPUT:
		1708	RETVAL
		1709
		1710	void _on_next_submit (SV *cb)
		1711	CODE:
		1712	SvREFCNT_dec (on_next_submit);
		1713	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1714
		1715	PROTOTYPES: DISABLE
		1716
		1717	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1718
		1719	void
		1720	cancel (aio_req_ornot req)
		1721	CODE:
		1722	eio_cancel (req);
		1723
		1724	void
		1725	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1726	PPCODE:
		1727	{
		1728	if (GIMME_V != G_VOID)
		1729	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1730
		1731	if (items > 1)
		1732	{
		1733	SV *cb_cv =get_cb (callback);
		1734
		1735	SvREFCNT_dec (req->callback);
		1736	req->callback = SvREFCNT_inc (cb_cv);
		1737	}
		1738	}
		1739
		1740	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1741
		1742	void
		1743	add (aio_req grp, ...)
		1744	PPCODE:
		1745	{
		1746	int i;
		1747
		1748	if (grp->int1 == 2)
		1749	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1750
		1751	for (i = 1; i < items; ++i )
		1752	{
		1753	aio_req req;
		1754
		1755	if (GIMME_V != G_VOID)
		1756	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1757
		1758	req = SvAIO_REQ (ST (i));
		1759
		1760	if (req)
		1761	eio_grp_add (grp, req);
		1762	}
		1763	}
		1764
		1765	void
		1766	cancel_subs (aio_req_ornot req)
		1767	CODE:
		1768	req_cancel_subs (req);
		1769
		1770	void
		1771	result (aio_req grp, ...)
		1772	CODE:
		1773	{
		1774	int i;
		1775	AV *av;
		1776
		1777	grp->errorno = errno;
		1778
		1779	av = newAV ();
		1780	av_extend (av, items - 1);
		1781
		1782	for (i = 1; i < items; ++i )
		1783	av_push (av, newSVsv (ST (i)));
		1784
		1785	SvREFCNT_dec (grp->sv1);
		1786	grp->sv1 = (SV *)av;
		1787	}
		1788
		1789	void
		1790	errno (aio_req grp, int errorno = errno)
		1791	CODE:
		1792	grp->errorno = errorno;
		1793
		1794	void
		1795	limit (aio_req grp, int limit)
		1796	CODE:
		1797	eio_grp_limit (grp, limit);
		1798
		1799	void
		1800	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1801	CODE:
		1802	{
		1803	SvREFCNT_dec (grp->sv2);
		1804	grp->sv2 = newSVsv (callback);
		1805	grp->feed = aio_grp_feed;
		1806
		1807	if (grp->int2 <= 0)
		1808	grp->int2 = 2;
		1809
		1810	eio_grp_limit (grp, grp->int2);
		1811	}
		1812

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