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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.218 by root, Fri Jul 27 17:54:40 2012 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	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
13	#include <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
15	#include <limits.h>	16	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	17	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	18	#include <sched.h>
20		19
21	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
22	# if __linux	24	#if __linux__
		25	# include <linux/fs.h>
		26	# ifdef FS_IOC_FIEMAP
		27	# include <linux/types.h>
		28	# include <linux/fiemap.h>
		29	# define HAVE_FIEMAP 1
		30	# endif
		31	#endif
		32
		33	/* perl namespace pollution */
		34	#undef VERSION
		35
		36	/* perl stupidly overrides readdir and maybe others */
		37	/* with thread-unsafe versions, imagine that :( */
		38	#undef readdir
		39	#undef opendir
		40	#undef closedir
		41
		42	#ifdef _WIN32
		43
		44	// perl overrides all those nice libc functions
		45
		46	#undef malloc
		47	#undef free
		48	#undef open
		49	#undef read
		50	#undef write
		51	#undef send
		52	#undef recv
		53	#undef stat
		54	#undef lstat
		55	#undef fstat
		56	#undef truncate
		57	#undef ftruncate
		58	#undef open
		59	#undef link
		60	#undef close
		61	#undef unlink
		62	#undef mkdir
		63	#undef rmdir
		64	#undef rename
		65	#undef lseek
		66	#undef opendir
		67	#undef readdir
		68	#undef closedir
		69	#undef chmod
		70	#undef fchmod
		71	#undef dup
		72	#undef dup2
		73	#undef abort
		74	#undef pipe
		75
		76	#define EIO_STRUCT_STAT struct _stati64
		77	#define EIO_STRUCT_STATI64
		78
		79	#else
		80
		81	#include <sys/time.h>
23	# include <sys/sendfile.h>	82	#include <sys/select.h>
24	# elif __freebsd	83	#include <unistd.h>
25	# include <sys/socket.h>	84	#include <utime.h>
26	# include <sys/uio.h>	85	#include <signal.h>
27	# elif __hpux	86
28	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
29	# elif __solaris /* not yet */	88
30	# include <sys/sendfile.h>	89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	SV *sv3, *sv4; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/config.h"
		120	#include "libeio/eio.h"
		121
		122	static int req_invoke (eio_req *req);
		123	#define EIO_FINISH(req) req_invoke (req)
		124	static void req_destroy (eio_req *grp);
		125	#define EIO_DESTROY(req) req_destroy (req)
		126
		127	#include "libeio/eio.c"
		128
		129	#if !HAVE_POSIX_FADVISE
		130	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		131	#endif
		132
		133	#if !HAVE_POSIX_MADVISE
		134	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#ifndef MAP_ANONYMOUS
		138	# ifdef MAP_ANON
		139	# define MAP_ANONYMOUS MAP_ANON
31	# else	140	# else
32	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	142	# endif
34	#endif	143	#endif
35		144
36	#if __ia64	145	/* defines all sorts of constants to 0 unless they are already defined */
37	# define STACKSIZE 65536	146	#include "def0.h"
38	#else
39	# define STACKSIZE 8192
40	#endif
41		147
42	enum {	148	#ifndef makedev
43	REQ_QUIT,	149	# define makedev(maj,min) (((maj) << 8) | (min))
44	REQ_OPEN, REQ_CLOSE,	150	#endif
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	151	#ifndef major
46	REQ_SENDFILE,	152	# define major(dev) ((dev) >> 8)
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	153	#endif
48	REQ_FSYNC, REQ_FDATASYNC,	154	#ifndef minor
49	REQ_UNLINK, REQ_RMDIR,	155	# define minor(dev) ((dev) & 0xff)
50	REQ_READDIR,	156	#endif
51	REQ_SYMLINK,
52	};
53		157
54	typedef struct aio_cb {	158	#ifndef PAGESIZE
55	struct aio_cb *volatile next;	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
56		161
57	int type;	162	/*****************************************************************************/
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;
75
76	static int started, wanted;
77	static volatile int nreqs;
78	static int max_outstanding = 1<<30;
79	static int respipe [2];
80
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84
85	static volatile aio_req reqs, reqe; /* queue start, queue end */
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92
93	if (req->fh)
94	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107
108	Safefree (req);
109	}
110		163
111	static void	164	static void
112	poll_wait ()	165	fiemap (eio_req *req)
113	{	166	{
114	if (nreqs && !ress)	167	req->result = -1;
115	{
116	fd_set rfd;
117	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);
119		168
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	169	#if HAVE_FIEMAP
121	}
122	}
123
124	static int
125	poll_cb ()
126	{
127	dSP;
128	int count = 0;	170	int count = req->int3;
129	int do_croak = 0;	171
130	aio_req req;	172	/* heuristic: first try with 72 extents if we don't know how many, */
		173	/* as most files have (hopefully) fewer than this many extents */
		174	/* in fact, most should have <= 2, so the 72 below is probably overkill */
		175	if (count < 0)
		176	count = 72; /* for what it's worth, 72 extents fit nicely into 4kb */
131		177
132	for (;;)	178	for (;;)
133	{	179	{
134	pthread_mutex_lock (&reslock);	180	struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
135	req = ress;	181	errno = ENOMEM;
136
137	if (req)	182	if (!fiemap)
		183	return;
		184
		185	req->ptr1 = fiemap;
		186	req->flags |= EIO_FLAG_PTR1_FREE;
		187
		188	fiemap->fm_start = req->offs;
		189	fiemap->fm_length = req->size;
		190	fiemap->fm_flags = req->int2;
		191	fiemap->fm_extent_count = count;
		192
		193	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		194	return;
		195
		196	if (req->int3 >= 0)
		197	break; /* when not autosizing we are done */
		198
		199	if (!fiemap->fm_mapped_extents)
		200	break; /* if file has no segments, we are done */
		201
		202	if (fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST)
		203	break; /* autosizing successful, we are done */
		204
		205	fiemap->fm_flags = req->int2;
		206	fiemap->fm_extent_count = 0;
		207
		208	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		209	return;
		210
		211	count = fiemap->fm_mapped_extents;
		212
		213	free (fiemap);
		214	}
		215
		216	req->result = 0;
		217
		218	#else
		219	errno = ENOSYS;
		220	#endif
		221	}
		222
		223	/*****************************************************************************/
		224
		225	enum {
		226	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		227	};
		228
		229	typedef eio_req *aio_req;
		230	typedef eio_req *aio_req_ornot;
		231	typedef eio_wd aio_wd;
		232
		233	static SV *on_next_submit;
		234	static int next_pri = EIO_PRI_DEFAULT;
		235	static int max_outstanding;
		236
		237	static s_epipe respipe;
		238
		239	static void req_destroy (aio_req req);
		240	static void req_cancel (aio_req req);
		241
		242	static void
		243	want_poll (void)
		244	{
		245	/* write a dummy byte to the pipe so fh becomes ready */
		246	s_epipe_signal (&respipe);
		247	}
		248
		249	static void
		250	done_poll (void)
		251	{
		252	/* read any signals sent by the worker threads */
		253	s_epipe_drain (&respipe);
		254	}
		255
		256	/* must be called at most once */
		257	static SV *
		258	req_sv (aio_req req, HV *stash)
		259	{
		260	if (!req->self)
		261	{
		262	req->self = (SV *)newHV ();
		263	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		264	}
		265
		266	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		267	}
		268
		269	static SV *
		270	newSVaio_wd (aio_wd wd)
		271	{
		272	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		273	}
		274
		275	static aio_req
		276	SvAIO_REQ (SV *sv)
		277	{
		278	MAGIC *mg;
		279
		280	if (!SvROK (sv)
		281	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		282	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		283	&& SvSTASH (SvRV (sv)) != aio_req_stash
		284	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		285	croak ("object of class IO::AIO::REQ expected");
		286
		287	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		288
		289	return mg ? (aio_req)mg->mg_ptr : 0;
		290	}
		291
		292	static aio_wd
		293	SvAIO_WD (SV *sv)
		294	{
		295	if (!SvROK (sv)
		296	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		297	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		298	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		299
		300	return (aio_wd)(long)SvIVX (SvRV (sv));
		301	}
		302
		303	static void
		304	aio_grp_feed (aio_req grp)
		305	{
		306	if (grp->sv2 && SvOK (grp->sv2))
		307	{
		308	dSP;
		309
		310	ENTER;
		311	SAVETMPS;
		312	PUSHMARK (SP);
		313	XPUSHs (req_sv (grp, aio_grp_stash));
		314	PUTBACK;
		315	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		316	SPAGAIN;
		317	FREETMPS;
		318	LEAVE;
		319	}
		320	}
		321
		322	static void
		323	req_submit (eio_req *req)
		324	{
		325	eio_submit (req);
		326
		327	if (expect_false (on_next_submit))
		328	{
		329	dSP;
		330	SV *cb = sv_2mortal (on_next_submit);
		331
		332	on_next_submit = 0;
		333
		334	PUSHMARK (SP);
		335	PUTBACK;
		336	call_sv (cb, G_DISCARD | G_EVAL);
		337	}
		338	}
		339
		340	static int
		341	req_invoke (eio_req *req)
		342	{
		343	if (req->flags & FLAG_SV2_RO_OFF)
		344	SvREADONLY_off (req->sv2);
		345
		346	if (!EIO_CANCELLED (req) && req->callback)
		347	{
		348	dSP;
		349	static SV *sv_result_cache; /* caches the result integer SV */
		350	SV *sv_result;
		351
		352	ENTER;
		353	SAVETMPS;
		354	PUSHMARK (SP);
		355	EXTEND (SP, 1);
		356
		357	/* do not recreate the result IV from scratch each time */
		358	if (expect_true (sv_result_cache))
138	{	359	{
139	ress = req->next;	360	sv_result = sv_result_cache; sv_result_cache = 0;
140		361	SvIV_set (sv_result, req->result);
141	if (!ress)	362	SvIOK_only (sv_result);
142	{
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147
148	rese = 0;
149	}
150	}
151
152	pthread_mutex_unlock (&reslock);
153
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);
235	}
236	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}
243
244	free_req (req);
245	}
246
247	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{
372	ssize_t res;
373	off_t ooffset;
374
375	pthread_mutex_lock (&preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381
382	return res;
383	}
384
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390
391	pthread_mutex_lock (&preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397
398	return res;
399	}
400	#endif
401
402	#if !HAVE_FDATASYNC
403	# define fdatasync fsync
404	#endif
405
406	#if !HAVE_READAHEAD
407	# define readahead aio_readahead
408
409	static ssize_t
410	readahead (int fd, off_t offset, size_t count)
411	{
412	char readahead_buf[4096];
413
414	while (count > 0)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}
484
485	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# endif
505	#else
506	res = -1;
507	errno = ENOSYS;
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	while (count)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	count -= cnt;
545	}
546	}
547
548	return res;
549	}
550
551	/* read a full directory */
552	static int
553	scandir_ (const char *path, void **namesp)
554	{
555	DIR *dirp = opendir (path);
556	union
557	{
558	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;
561	struct dirent *entp;
562	char *name, *names;
563	int memlen = 4096;
564	int memofs = 0;
565	int res = 0;
566	int errorno;
567
568	if (!dirp)
569	return -1;
570
571	names = malloc (memlen);
572
573	for (;;)
574	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);
576
577	if (!entp)
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626
627	for (;;)
628	{
629	req = reqs;
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636
637	if (req)
638	break;
639
640	pthread_cond_wait (&reqwait, &reqlock);
641	}
642
643	pthread_mutex_unlock (&reqlock);
644
645	errno = 0; /* strictly unnecessary */
646
647	type = req->type;
648
649	switch (type)
650	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}	363	}
690	else	364	else
691	{	365	{
692	rese = ress = req;	366	sv_result = newSViv (req->result);
693		367	SvREADONLY_on (sv_result);
694	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);
696	}	368	}
697		369
698	pthread_mutex_unlock (&reslock);	370	switch (req->type)
		371	{
		372	case EIO_WD_OPEN:
		373	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		374	break;
		375
		376	case EIO_READDIR:
		377	{
		378	SV *rv = &PL_sv_undef;
		379
		380	if (req->result >= 0)
		381	{
		382	int i;
		383	char *names = (char *)req->ptr2;
		384	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		385	AV *av = newAV ();
		386
		387	av_extend (av, req->result - 1);
		388
		389	for (i = 0; i < req->result; ++i)
		390	{
		391	if (req->int1 & EIO_READDIR_DENTS)
		392	{
		393	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		394
		395	if (req->int1 & EIO_READDIR_CUSTOM2)
		396	{
		397	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		398	AV *avent = newAV ();
		399
		400	av_extend (avent, 2);
		401
		402	if (!sv_type [ent->type])
		403	{
		404	sv_type [ent->type] = newSViv (ent->type);
		405	SvREADONLY_on (sv_type [ent->type]);
		406	}
		407
		408	av_store (avent, 0, namesv);
		409	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		410	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		411
		412	av_store (av, i, newRV_noinc ((SV *)avent));
		413	}
		414	else
		415	av_store (av, i, namesv);
		416
		417	++ent;
		418	}
		419	else
		420	{
		421	SV *name = newSVpv (names, 0);
		422	av_store (av, i, name);
		423	names += SvCUR (name) + 1;
		424	}
		425	}
		426
		427	rv = sv_2mortal (newRV_noinc ((SV *)av));
		428	}
		429
		430	PUSHs (rv);
		431
		432	if (req->int1 & EIO_READDIR_CUSTOM1)
		433	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		434	}
		435	break;
		436
		437	case EIO_OPEN:
		438	{
		439	/* convert fd to fh */
		440	SV *fh = &PL_sv_undef;
		441
		442	if (req->result >= 0)
		443	{
		444	GV *gv = (GV *)sv_newmortal ();
		445	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		446	char sym [64];
		447	int symlen;
		448
		449	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		450	gv_init (gv, aio_stash, sym, symlen, 0);
		451
		452	symlen = snprintf (
		453	sym,
		454	sizeof (sym),
		455	"%s&=%d",
		456	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		457	(int)req->result
		458	);
		459
		460	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		461	fh = (SV *)gv;
		462	}
		463
		464	PUSHs (fh);
		465	}
		466	break;
		467
		468	case EIO_STATVFS:
		469	case EIO_FSTATVFS:
		470	{
		471	SV *rv = &PL_sv_undef;
		472
		473	#ifndef _WIN32
		474	if (req->result >= 0)
		475	{
		476	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		477	HV *hv = newHV ();
		478
		479	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		480
		481	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		482	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		483	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		484	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		485	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		486	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		487	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		488	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		489	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		490	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		491	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		492	}
		493	#endif
		494
		495	PUSHs (rv);
		496	}
		497
		498	break;
		499
		500	case EIO_GROUP:
		501	req->int1 = 2; /* mark group as finished */
		502
		503	if (req->sv1)
		504	{
		505	int i;
		506	AV *av = (AV *)req->sv1;
		507
		508	EXTEND (SP, AvFILL (av) + 1);
		509	for (i = 0; i <= AvFILL (av); ++i)
		510	PUSHs (*av_fetch (av, i, 0));
		511	}
		512	break;
		513
		514	case EIO_NOP:
		515	case EIO_BUSY:
		516	break;
		517
		518	case EIO_READLINK:
		519	case EIO_REALPATH:
		520	if (req->result > 0)
		521	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		522	break;
		523
		524	case EIO_STAT:
		525	case EIO_LSTAT:
		526	case EIO_FSTAT:
		527	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		528
		529	if (!(PL_laststatval = req->result))
		530	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		531	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		532
		533	PUSHs (sv_result);
		534	break;
		535
		536	case EIO_SEEK:
		537	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		538	break;
		539
		540	case EIO_READ:
		541	{
		542	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		543	*SvEND (req->sv2) = 0;
		544	SvPOK_only (req->sv2);
		545	SvSETMAGIC (req->sv2);
		546	PUSHs (sv_result);
		547	}
		548	break;
		549
		550	case EIO_CUSTOM:
		551	if (req->feed == fiemap)
		552	{
		553	#if HAVE_FIEMAP
		554	if (!req->result)
		555	{
		556	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		557
		558	if (fiemap->fm_extent_count)
		559	{
		560	AV *av = newAV ();
		561	int i;
		562
		563	while (fiemap->fm_mapped_extents)
		564	{
		565	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		566	AV *ext_av = newAV ();
		567
		568	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		569	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		570	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		571	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		572
		573	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		574	}
		575
		576	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		577	}
		578	else
		579	{
		580	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		581	PUSHs (sv_result);
		582	}
		583	}
		584	#endif
		585	}
		586	else
		587	PUSHs (sv_result);
		588	break;
		589
		590	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		591	if (req->result > 0)
		592	SvIV_set (sv_result, 0);
		593	/* FALLTHROUGH */
		594
		595	default:
		596	PUSHs (sv_result);
		597	break;
		598	}
		599
		600	errno = req->errorno;
		601
		602	PUTBACK;
		603	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		604	SPAGAIN;
		605
		606	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		607	SvREFCNT_dec (sv_result);
		608	else
		609	sv_result_cache = sv_result;
		610
		611	FREETMPS;
		612	LEAVE;
		613
		614	PUTBACK;
699	}	615	}
700	while (type != REQ_QUIT);	616
		617	return !!SvTRUE (ERRSV);
		618	}
		619
		620	static void
		621	req_destroy (aio_req req)
		622	{
		623	if (req->self)
		624	{
		625	sv_unmagic (req->self, PERL_MAGIC_ext);
		626	SvREFCNT_dec (req->self);
		627	}
		628
		629	SvREFCNT_dec (req->sv1);
		630	SvREFCNT_dec (req->sv2);
		631	SvREFCNT_dec (req->sv3);
		632	SvREFCNT_dec (req->sv4);
		633	SvREFCNT_dec (req->callback);
		634
		635	free (req);
		636	}
		637
		638	static void
		639	req_cancel_subs (aio_req grp)
		640	{
		641	if (grp->type != EIO_GROUP)
		642	return;
		643
		644	SvREFCNT_dec (grp->sv2);
		645	grp->sv2 = 0;
		646
		647	eio_grp_cancel (grp);
		648	}
		649
		650	static void ecb_cold
		651	create_respipe (void)
		652	{
		653	if (s_epipe_renew (&respipe))
		654	croak ("IO::AIO: unable to initialize result pipe");
		655	}
		656
		657	static void
		658	poll_wait (void)
		659	{
		660	while (eio_nreqs ())
		661	{
		662	int size;
		663
		664	X_LOCK (reslock);
		665	size = res_queue.size;
		666	X_UNLOCK (reslock);
		667
		668	if (size)
		669	return;
		670
		671	etp_maybe_start_thread ();
		672
		673	s_epipe_wait (&respipe);
		674	}
		675	}
		676
		677	static int
		678	poll_cb (void)
		679	{
		680	for (;;)
		681	{
		682	int res = eio_poll ();
		683
		684	if (res > 0)
		685	croak (0);
		686
		687	if (!max_outstanding || max_outstanding > eio_nreqs ())
		688	return res;
		689
		690	poll_wait ();
		691	}
		692	}
		693
		694	static void ecb_cold
		695	reinit (void)
		696	{
		697	create_respipe ();
		698
		699	if (eio_init (want_poll, done_poll) < 0)
		700	croak ("IO::AIO: unable to initialise eio library");
		701	}
		702
		703	/*****************************************************************************/
		704
		705	#if !_POSIX_MAPPED_FILES
		706	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		707	# define munmap(addr,length) EIO_ENOSYS ()
		708	#endif
		709
		710	#if !_POSIX_MEMORY_PROTECTION
		711	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		712	# define PROT_NONE 0
		713	# define PROT_WRITE 0
		714	# define MAP_PRIVATE 0
		715	# define MAP_SHARED 0
		716	# define MAP_FIXED 0
		717	#endif
		718
		719	#define MMAP_MAGIC PERL_MAGIC_ext
		720
		721	static int ecb_cold
		722	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		723	{
		724	int old_errno = errno;
		725	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		726	errno = old_errno;
		727
		728	mg->mg_obj = 0; /* just in case */
		729
		730	SvREADONLY_off (sv);
		731
		732	if (SvPVX (sv) != mg->mg_ptr)
		733	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		734
		735	SvCUR_set (sv, 0);
		736	SvPVX (sv) = 0;
		737	SvOK_off (sv);
701		738
702	return 0;	739	return 0;
703	}	740	}
704		741
		742	static MGVTBL mmap_vtbl = {
		743	0, 0, 0, 0, mmap_free
		744	};
		745
705	/*****************************************************************************/	746	/*****************************************************************************/
706		747
707	static void atfork_prepare (void)	748	static SV *
		749	get_cb (SV *cb_sv)
708	{	750	{
709	pthread_mutex_lock (&reqlock);	751	SvGETMAGIC (cb_sv);
710	pthread_mutex_lock (&reslock);	752	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
711	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);
713	#endif
714	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);
716	#endif
717	}	753	}
718		754
719	static void atfork_parent (void)	755	static aio_req ecb_noinline
		756	dreq (SV *callback)
720	{	757	{
721	#if !HAVE_READDIR_R	758	SV *cb_cv;
722	pthread_mutex_unlock (&readdirlock);
723	#endif
724	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);
726	#endif
727	pthread_mutex_unlock (&reslock);
728	pthread_mutex_unlock (&reqlock);
729	}
730
731	static void atfork_child (void)
732	{
733	aio_req prv;	759	aio_req req;
		760	int req_pri = next_pri;
		761	next_pri = EIO_PRI_DEFAULT;
734		762
735	started = 0;	763	cb_cv = get_cb (callback);
736		764
737	while (reqs)	765	req = calloc (sizeof (*req), 1);
		766	if (!req)
		767	croak ("out of memory during eio_req allocation");
		768
		769	req->callback = SvREFCNT_inc (cb_cv);
		770	req->pri = req_pri;
		771
		772	return req;
		773	}
		774
		775	#define dREQ \
		776	aio_req req = dreq (callback); \
		777
		778	#define REQ_SEND \
		779	PUTBACK; \
		780	req_submit (req); \
		781	SPAGAIN; \
		782	\
		783	if (GIMME_V != G_VOID) \
		784	XPUSHs (req_sv (req, aio_req_stash));
		785
		786	ecb_inline void
		787	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		788	{
		789	if (expect_false (SvROK (path)))
738	{	790	{
739	prv = reqs;	791	SV *rv = SvRV (path);
740	reqs = prv->next;	792	SV *wdob;
741	free_req (prv);	793
		794	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		795	{
		796	path = AvARRAY (rv)[1];
		797	wdob = AvARRAY (rv)[0];
		798
		799	if (SvOK (wdob))
		800	{
		801	*wd = SvAIO_WD (wdob);
		802	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		803	}
		804	else
		805	*wd = EIO_INVALID_WD;
		806	}
		807	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		808	{
		809	*wd = (aio_wd)(long)SvIVX (rv);
		810	*wdsv = SvREFCNT_inc_NN (rv);
		811	*ptr = ".";
		812	return; /* path set to "." */
		813	}
		814	else
		815	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
742	}	816	}
743		817
744	reqs = reqe = 0;	818	*pathsv = newSVsv (path);
745		819	*ptr = SvPVbyte_nolen (*pathsv);
746	while (ress)	820	}
		821
		822	static void ecb_noinline
		823	req_set_path1 (aio_req req, SV *path)
		824	{
		825	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		826	}
		827
		828	static void ecb_noinline
		829	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		830	{
		831	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		832
		833	switch (SvTYPE (rv))
747	{	834	{
748	prv = ress;	835	case SVt_PVIO:
749	ress = prv->next;	836	case SVt_PVLV:
750	free_req (prv);	837	case SVt_PVGV:
		838	req->type = type_fh;
		839	req->sv1 = newSVsv (fh_or_path);
		840	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		841	break;
		842
		843	default:
		844	req->type = type_path;
		845	req_set_path1 (req, fh_or_path);
		846	break;
751	}	847	}
752
753	ress = rese = 0;
754
755	close (respipe [0]);
756	close (respipe [1]);
757	create_pipe ();
758
759	atfork_parent ();
760	}	848	}
761		849
762	#define dREQ \	850	XS(boot_IO__AIO) ecb_cold;
763	aio_req req; \	851
764	\
765	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \
767	\
768	Newz (0, req, 1, aio_cb); \
769	if (!req) \
770	croak ("out of memory during aio_req allocation"); \
771	\
772	req->callback = newSVsv (callback);
773
774	MODULE = IO::AIO PACKAGE = IO::AIO	852	MODULE = IO::AIO PACKAGE = IO::AIO
775		853
776	PROTOTYPES: ENABLE	854	PROTOTYPES: ENABLE
777		855
778	BOOT:	856	BOOT:
779	{	857	{
780	create_pipe ();	858	static const struct {
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	859	const char *name;
782	}	860	IV iv;
		861	} *civ, const_iv[] = {
		862	# define const_niv(name, value) { # name, (IV) value },
		863	# define const_iv(name) { # name, (IV) name },
		864	# define const_eio(name) { # name, (IV) EIO_ ## name },
783		865
		866	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		867
		868	const_iv (ENOSYS)
		869	const_iv (EXDEV)
		870	const_iv (EBADR)
		871
		872	const_iv (O_RDONLY)
		873	const_iv (O_WRONLY)
		874	const_iv (O_RDWR)
		875	const_iv (O_CREAT)
		876	const_iv (O_TRUNC)
		877	const_iv (O_EXCL)
		878	const_iv (O_APPEND)
		879
		880	const_iv (O_ASYNC)
		881	const_iv (O_DIRECT)
		882	const_iv (O_NOATIME)
		883
		884	const_iv (O_CLOEXEC)
		885	const_iv (O_NOCTTY)
		886	const_iv (O_NOFOLLOW)
		887	const_iv (O_NONBLOCK)
		888	const_iv (O_EXEC)
		889	const_iv (O_SEARCH)
		890	const_iv (O_DIRECTORY)
		891	const_iv (O_DSYNC)
		892	const_iv (O_RSYNC)
		893	const_iv (O_SYNC)
		894	const_iv (O_TTY_INIT)
		895
		896	const_iv (S_IFIFO)
		897	const_iv (S_IFCHR)
		898	const_iv (S_IFBLK)
		899	const_iv (S_IFLNK)
		900	const_iv (S_IFREG)
		901	const_iv (S_IFDIR)
		902	const_iv (S_IFWHT)
		903	const_iv (S_IFSOCK)
		904	const_iv (S_IFMT)
		905
		906	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		907	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		908	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		909	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		910	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		911	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		912
		913	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		914	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		915	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		916	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		917	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		918
		919	const_iv (ST_RDONLY)
		920	const_iv (ST_NOSUID)
		921	const_iv (ST_NODEV)
		922	const_iv (ST_NOEXEC)
		923	const_iv (ST_SYNCHRONOUS)
		924	const_iv (ST_MANDLOCK)
		925	const_iv (ST_WRITE)
		926	const_iv (ST_APPEND)
		927	const_iv (ST_IMMUTABLE)
		928	const_iv (ST_NOATIME)
		929	const_iv (ST_NODIRATIME)
		930	const_iv (ST_RELATIME)
		931
		932	const_iv (PROT_NONE)
		933	const_iv (PROT_EXEC)
		934	const_iv (PROT_READ)
		935	const_iv (PROT_WRITE)
		936
		937	/*const_iv (MAP_FIXED)*/
		938	const_iv (MAP_PRIVATE)
		939	const_iv (MAP_SHARED)
		940	const_iv (MAP_ANONYMOUS)
		941
		942	/* linuxish */
		943	const_iv (MAP_HUGETLB)
		944	const_iv (MAP_LOCKED)
		945	const_iv (MAP_NORESERVE)
		946	const_iv (MAP_POPULATE)
		947	const_iv (MAP_NONBLOCK)
		948
		949	const_iv (FIEMAP_FLAG_SYNC)
		950	const_iv (FIEMAP_FLAG_XATTR)
		951	const_iv (FIEMAP_FLAGS_COMPAT)
		952	const_iv (FIEMAP_EXTENT_LAST)
		953	const_iv (FIEMAP_EXTENT_UNKNOWN)
		954	const_iv (FIEMAP_EXTENT_DELALLOC)
		955	const_iv (FIEMAP_EXTENT_ENCODED)
		956	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		957	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		958	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		959	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		960	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		961	const_iv (FIEMAP_EXTENT_MERGED)
		962	const_iv (FIEMAP_EXTENT_SHARED)
		963
		964	const_iv (SPLICE_F_MOVE)
		965	const_iv (SPLICE_F_NONBLOCK)
		966	const_iv (SPLICE_F_MORE)
		967	const_iv (SPLICE_F_GIFT)
		968
		969	const_iv (SEEK_DATA)
		970	const_iv (SEEK_HOLE)
		971
		972	/* libeio constants */
		973	const_eio (SEEK_SET)
		974	const_eio (SEEK_CUR)
		975	const_eio (SEEK_END)
		976
		977	const_eio (MCL_FUTURE)
		978	const_eio (MCL_CURRENT)
		979
		980	const_eio (MS_ASYNC)
		981	const_eio (MS_INVALIDATE)
		982	const_eio (MS_SYNC)
		983
		984	const_eio (MT_MODIFY)
		985
		986	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		987	const_eio (SYNC_FILE_RANGE_WRITE)
		988	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		989
		990	const_eio (FALLOC_FL_KEEP_SIZE)
		991	const_eio (FALLOC_FL_PUNCH_HOLE)
		992
		993	const_eio (READDIR_DENTS)
		994	const_eio (READDIR_DIRS_FIRST)
		995	const_eio (READDIR_STAT_ORDER)
		996	const_eio (READDIR_FOUND_UNKNOWN)
		997
		998	const_eio (DT_UNKNOWN)
		999	const_eio (DT_FIFO)
		1000	const_eio (DT_CHR)
		1001	const_eio (DT_DIR)
		1002	const_eio (DT_BLK)
		1003	const_eio (DT_REG)
		1004	const_eio (DT_LNK)
		1005	const_eio (DT_SOCK)
		1006	const_eio (DT_WHT)
		1007	};
		1008
		1009	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1010	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1011	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1012	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1013
		1014	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1015	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1016
		1017	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1018
		1019	reinit ();
		1020	}
		1021
784	void	1022	void
785	min_parallel(nthreads)	1023	reinit ()
786	int nthreads	1024	PROTOTYPE:
		1025
		1026	void
		1027	max_poll_reqs (unsigned int nreqs)
787	PROTOTYPE: $	1028	PROTOTYPE: $
		1029	CODE:
		1030	eio_set_max_poll_reqs (nreqs);
788		1031
789	void	1032	void
790	max_parallel(nthreads)	1033	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	1034	PROTOTYPE: $
793
794	int
795	max_outstanding(nreqs)
796	int nreqs
797	PROTOTYPE: $
798	CODE:	1035	CODE:
799	RETVAL = max_outstanding;	1036	eio_set_max_poll_time (nseconds);
		1037
		1038	void
		1039	min_parallel (unsigned int nthreads)
		1040	PROTOTYPE: $
		1041	CODE:
		1042	eio_set_min_parallel (nthreads);
		1043
		1044	void
		1045	max_parallel (unsigned int nthreads)
		1046	PROTOTYPE: $
		1047	CODE:
		1048	eio_set_max_parallel (nthreads);
		1049
		1050	void
		1051	max_idle (unsigned int nthreads)
		1052	PROTOTYPE: $
		1053	CODE:
		1054	eio_set_max_idle (nthreads);
		1055
		1056	void
		1057	idle_timeout (unsigned int seconds)
		1058	PROTOTYPE: $
		1059	CODE:
		1060	eio_set_idle_timeout (seconds);
		1061
		1062	void
		1063	max_outstanding (unsigned int maxreqs)
		1064	PROTOTYPE: $
		1065	CODE:
800	max_outstanding = nreqs;	1066	max_outstanding = maxreqs;
801		1067
802	void	1068	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1069	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
804	SV * pathname
805	int flags
806	int mode
807	SV * callback
808	PROTOTYPE: $$$;$
809	CODE:	1070	PPCODE:
810	{	1071	{
811	dREQ;	1072	dREQ;
812		1073
		1074	req->type = EIO_WD_OPEN;
		1075	req_set_path1 (req, pathname);
		1076
		1077	REQ_SEND;
		1078	}
		1079
		1080	void
		1081	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1082	PPCODE:
		1083	{
		1084	dREQ;
		1085
813	req->type = REQ_OPEN;	1086	req->type = EIO_OPEN;
814	req->data = newSVsv (pathname);	1087	req_set_path1 (req, pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);
816	req->fd = flags;	1088	req->int1 = flags;
817	req->mode = mode;	1089	req->int2 = mode;
818		1090
819	send_req (req);	1091	REQ_SEND;
820	}	1092	}
821		1093
822	void	1094	void
823	aio_close(fh,callback=&PL_sv_undef)	1095	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
824	SV * fh
825	SV * callback
826	PROTOTYPE: $;$
827	ALIAS:	1096	ALIAS:
828	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1097	aio_fsync = EIO_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1098	aio_fdatasync = EIO_FDATASYNC
		1099	aio_syncfs = EIO_SYNCFS
831	CODE:	1100	PPCODE:
832	{	1101	{
		1102	int fd = s_fileno_croak (fh, 0);
833	dREQ;	1103	dREQ;
834		1104
835	req->type = ix;	1105	req->type = ix;
836	req->fh = newSVsv (fh);	1106	req->sv1 = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1107	req->int1 = fd;
838		1108
839	send_req (req);	1109	REQ_SEND;
840	}	1110	}
841		1111
842	void	1112	void
		1113	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1114	PPCODE:
		1115	{
		1116	int fd = s_fileno_croak (fh, 0);
		1117	dREQ;
		1118
		1119	req->type = EIO_SYNC_FILE_RANGE;
		1120	req->sv1 = newSVsv (fh);
		1121	req->int1 = fd;
		1122	req->offs = offset;
		1123	req->size = nbytes;
		1124	req->int2 = flags;
		1125
		1126	REQ_SEND;
		1127	}
		1128
		1129	void
		1130	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1131	PPCODE:
		1132	{
		1133	int fd = s_fileno_croak (fh, 0);
		1134	dREQ;
		1135
		1136	req->type = EIO_FALLOCATE;
		1137	req->sv1 = newSVsv (fh);
		1138	req->int1 = fd;
		1139	req->int2 = mode;
		1140	req->offs = offset;
		1141	req->size = len;
		1142
		1143	REQ_SEND;
		1144	}
		1145
		1146	void
		1147	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1148	PPCODE:
		1149	{
		1150	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1151	int fd = s_fileno_croak (fh, 0);
		1152	dREQ;
		1153
		1154	if (expect_false (close_fd < 0))
		1155	{
		1156	int pipefd [2];
		1157
		1158	if (
		1159	#ifdef _WIN32
		1160	_pipe (pipefd, 1, _O_BINARY) < 0
		1161	#else
		1162	pipe (pipefd) < 0
		1163	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1164	#endif
		1165	|| close (pipefd [1]) < 0
		1166	)
		1167	abort (); /*D*/
		1168
		1169	close_fd = pipefd [0];
		1170	}
		1171
		1172	req->type = EIO_DUP2;
		1173	req->int1 = close_fd;
		1174	req->sv2 = newSVsv (fh);
		1175	req->int2 = fd;
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	int fd = s_fileno_croak (fh, 0);
		1185	dREQ;
		1186
		1187	req->type = EIO_SEEK;
		1188	req->sv1 = newSVsv (fh);
		1189	req->int1 = fd;
		1190	req->offs = SvVAL64 (offset);
		1191	req->int2 = whence;
		1192
		1193	REQ_SEND;
		1194	}
		1195
		1196	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1197	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
844	SV * fh
845	UV offset
846	UV length
847	SV * data
848	UV dataoffset
849	SV * callback
850	ALIAS:	1198	ALIAS:
851	aio_read = REQ_READ	1199	aio_read = EIO_READ
852	aio_write = REQ_WRITE	1200	aio_write = EIO_WRITE
853	PROTOTYPE: $$$$$;$
854	CODE:	1201	PPCODE:
855	{	1202	{
856	aio_req req;
857	STRLEN svlen;	1203	STRLEN svlen;
		1204	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
858	char *svptr = SvPVbyte (data, svlen);	1205	char *svptr = SvPVbyte (data, svlen);
859		1206	UV len = SvUV (length);
860	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);
862		1207
863	if (dataoffset < 0)	1208	if (dataoffset < 0)
864	dataoffset += svlen;	1209	dataoffset += svlen;
865		1210
866	if (dataoffset < 0 || dataoffset > svlen)	1211	if (dataoffset < 0 || dataoffset > svlen)
867	croak ("data offset outside of string");	1212	croak ("dataoffset outside of data scalar");
868		1213
869	if (ix == REQ_WRITE)	1214	if (ix == EIO_WRITE)
870	{	1215	{
871	/* write: check length and adjust. */	1216	/* write: check length and adjust. */
872	if (length < 0 || length + dataoffset > svlen)	1217	if (!SvOK (length) || len + dataoffset > svlen)
873	length = svlen - dataoffset;	1218	len = svlen - dataoffset;
874	}	1219	}
875	else	1220	else
876	{	1221	{
877	/* read: grow scalar as necessary */	1222	/* read: check type and grow scalar as necessary */
		1223	SvUPGRADE (data, SVt_PV);
		1224	if (SvLEN (data) >= SvCUR (data))
878	svptr = SvGROW (data, length + dataoffset);	1225	svptr = SvGROW (data, len + dataoffset + 1);
		1226	else if (SvCUR (data) < len + dataoffset)
		1227	croak ("length + dataoffset outside of scalar, and cannot grow");
879	}	1228	}
880
881	if (length < 0)
882	croak ("length must not be negative");
883		1229
884	{	1230	{
885	dREQ;	1231	dREQ;
886		1232
887	req->type = ix;	1233	req->type = ix;
888	req->fh = newSVsv (fh);	1234	req->sv1 = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1235	req->int1 = fd;
890	: IoOFP (sv_2io (fh)));	1236	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
891	req->offset = offset;	1237	req->size = len;
892	req->length = length;
893	req->data = SvREFCNT_inc (data);	1238	req->sv2 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	1239	req->ptr2 = (char *)svptr + dataoffset;
		1240	req->stroffset = dataoffset;
895		1241
896	if (!SvREADONLY (data))	1242	if (!SvREADONLY (data))
897	{	1243	{
898	SvREADONLY_on (data);	1244	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1245	req->flags |= FLAG_SV2_RO_OFF;
900	}	1246	}
901		1247
902	send_req (req);	1248	REQ_SEND;
903	}	1249	}
904	}	1250	}
905		1251
906	void	1252	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1253	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
908	SV * out_fh	1254	ALIAS:
909	SV * in_fh	1255	aio_readlink = EIO_READLINK
910	UV in_offset	1256	aio_realpath = EIO_REALPATH
911	UV length
912	SV * callback
913	PROTOTYPE: $$$$;$
914	CODE:	1257	PPCODE:
915	{	1258	{
		1259	dREQ;
		1260
		1261	req->type = ix;
		1262	req_set_path1 (req, pathname);
		1263
		1264	REQ_SEND;
		1265	}
		1266
		1267	void
		1268	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1269	PPCODE:
		1270	{
		1271	int ifd = s_fileno_croak (in_fh , 0);
		1272	int ofd = s_fileno_croak (out_fh, 1);
916	dREQ;	1273	dREQ;
917		1274
918	req->type = REQ_SENDFILE;	1275	req->type = EIO_SENDFILE;
919	req->fh = newSVsv (out_fh);	1276	req->sv1 = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1277	req->int1 = ofd;
921	req->fh2 = newSVsv (in_fh);	1278	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1279	req->int2 = ifd;
923	req->offset = in_offset;	1280	req->offs = in_offset;
924	req->length = length;	1281	req->size = length;
925		1282
926	send_req (req);	1283	REQ_SEND;
927	}	1284	}
928		1285
929	void	1286	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1287	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
931	SV * fh
932	UV offset
933	IV length
934	SV * callback
935	PROTOTYPE: $$$;$
936	CODE:	1288	PPCODE:
937	{	1289	{
		1290	int fd = s_fileno_croak (fh, 0);
938	dREQ;	1291	dREQ;
939		1292
940	req->type = REQ_READAHEAD;	1293	req->type = EIO_READAHEAD;
941	req->fh = newSVsv (fh);	1294	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1295	req->int1 = fd;
943	req->offset = offset;	1296	req->offs = offset;
944	req->length = length;	1297	req->size = length;
945		1298
946	send_req (req);	1299	REQ_SEND;
947	}	1300	}
948		1301
949	void	1302	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1303	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
951	SV * fh_or_path
952	SV * callback
953	ALIAS:	1304	ALIAS:
954	aio_stat = REQ_STAT	1305	aio_stat = EIO_STAT
955	aio_lstat = REQ_LSTAT	1306	aio_lstat = EIO_LSTAT
		1307	aio_statvfs = EIO_STATVFS
		1308	PPCODE:
		1309	{
		1310	dREQ;
		1311
		1312	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1313
		1314	REQ_SEND;
		1315	}
		1316
		1317	UV
		1318	major (UV dev)
		1319	ALIAS:
		1320	minor = 1
956	CODE:	1321	CODE:
		1322	RETVAL = ix ? major (dev) : minor (dev);
		1323	OUTPUT:
		1324	RETVAL
		1325
		1326	UV
		1327	makedev (UV maj, UV min)
		1328	CODE:
		1329	RETVAL = makedev (maj, min);
		1330	OUTPUT:
		1331	RETVAL
		1332
		1333	void
		1334	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1335	PPCODE:
957	{	1336	{
958	dREQ;	1337	dREQ;
959		1338
960	New (0, req->statdata, 1, Stat_t);	1339	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
961	if (!req->statdata)	1340	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
962	{	1341	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
963	free_req (req);
964	croak ("out of memory during aio_req->statdata allocation");
965	}
966		1342
967	if (SvPOK (fh_or_path))	1343	REQ_SEND;
968	{
969	req->type = ix;
970	req->data = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);
972	}
973	else
974	{
975	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}
979
980	send_req (req);
981	}	1344	}
982		1345
983	void	1346	void
		1347	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1348	PPCODE:
		1349	{
		1350	dREQ;
		1351
		1352	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1353	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1354
		1355	REQ_SEND;
		1356	}
		1357
		1358	void
		1359	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1360	PPCODE:
		1361	{
		1362	dREQ;
		1363
		1364	req->int2 = mode;
		1365	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1366
		1367	REQ_SEND;
		1368	}
		1369
		1370	void
		1371	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1372	PPCODE:
		1373	{
		1374	dREQ;
		1375
		1376	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1377	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1378	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1379
		1380	REQ_SEND;
		1381	}
		1382
		1383	void
		1384	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1385	PPCODE:
		1386	{
		1387	dREQ;
		1388
		1389	req->type = EIO_READDIR;
		1390	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1391
		1392	if (flags & EIO_READDIR_DENTS)
		1393	req->int1 |= EIO_READDIR_CUSTOM2;
		1394
		1395	req_set_path1 (req, pathname);
		1396
		1397	REQ_SEND;
		1398	}
		1399
		1400	void
		1401	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1402	PPCODE:
		1403	{
		1404	dREQ;
		1405
		1406	req->type = EIO_MKDIR;
		1407	req->int2 = mode;
		1408	req_set_path1 (req, pathname);
		1409
		1410	REQ_SEND;
		1411	}
		1412
		1413	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1414	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
985	SV * pathname
986	SV * callback
987	ALIAS:	1415	ALIAS:
988	aio_unlink = REQ_UNLINK	1416	aio_unlink = EIO_UNLINK
989	aio_rmdir = REQ_RMDIR	1417	aio_rmdir = EIO_RMDIR
		1418	aio_readdir = EIO_READDIR
990	CODE:	1419	PPCODE:
991	{	1420	{
992	dREQ;	1421	dREQ;
993		1422
994	req->type = ix;	1423	req->type = ix;
995	req->data = newSVsv (pathname);	1424	req_set_path1 (req, pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);
997
998	send_req (req);
999	}
1000		1425
		1426	REQ_SEND;
		1427	}
		1428
1001	void	1429	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1430	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1003	SV * oldpath	1431	ALIAS:
1004	SV * newpath	1432	aio_link = EIO_LINK
1005	SV * callback	1433	aio_symlink = EIO_SYMLINK
		1434	aio_rename = EIO_RENAME
1006	CODE:	1435	PPCODE:
1007	{	1436	{
		1437	eio_wd wd2 = 0;
1008	dREQ;	1438	dREQ;
1009		1439
1010	req->type = REQ_SYMLINK;	1440	req->type = ix;
1011	req->fh = newSVsv (oldpath);	1441	req_set_path1 (req, oldpath);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1442	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1013	req->data = newSVsv (newpath);	1443	req->int3 = (long)wd2;
1014	req->dataptr = SvPVbyte_nolen (req->data);
1015		1444
1016	send_req (req);	1445	REQ_SEND;
1017	}	1446	}
1018		1447
1019	void	1448	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1449	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1021	SV * pathname
1022	SV * callback
1023	CODE:	1450	PPCODE:
1024	{	1451	{
1025	dREQ;	1452	dREQ;
1026		1453
1027	req->type = REQ_READDIR;	1454	req->type = EIO_MKNOD;
1028	req->data = newSVsv (pathname);	1455	req->int2 = (mode_t)mode;
1029	req->dataptr = SvPVbyte_nolen (req->data);	1456	req->offs = dev;
		1457	req_set_path1 (req, pathname);
1030		1458
1031	send_req (req);	1459	REQ_SEND;
1032	}	1460	}
1033		1461
1034	void	1462	void
1035	flush()	1463	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1036	PROTOTYPE:	1464	ALIAS:
		1465	aio_mtouch = EIO_MTOUCH
		1466	aio_msync = EIO_MSYNC
		1467	PPCODE:
		1468	{
		1469	STRLEN svlen;
		1470	char *svptr = SvPVbyte (data, svlen);
		1471	UV len = SvUV (length);
		1472
		1473	if (offset < 0)
		1474	offset += svlen;
		1475
		1476	if (offset < 0 || offset > svlen)
		1477	croak ("offset outside of scalar");
		1478
		1479	if (!SvOK (length) || len + offset > svlen)
		1480	len = svlen - offset;
		1481
		1482	{
		1483	dREQ;
		1484
		1485	req->type = ix;
		1486	req->sv2 = SvREFCNT_inc (data);
		1487	req->ptr2 = (char *)svptr + offset;
		1488	req->size = len;
		1489	req->int1 = flags;
		1490
		1491	REQ_SEND;
		1492	}
		1493	}
		1494
		1495	void
		1496	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1497	PPCODE:
		1498	{
		1499	STRLEN svlen;
		1500	char *svptr = SvPVbyte (data, svlen);
		1501	UV len = SvUV (length);
		1502
		1503	if (offset < 0)
		1504	offset += svlen;
		1505
		1506	if (offset < 0 || offset > svlen)
		1507	croak ("offset outside of scalar");
		1508
		1509	if (!SvOK (length) || len + offset > svlen)
		1510	len = svlen - offset;
		1511
		1512	{
		1513	dREQ;
		1514
		1515	req->type = EIO_MLOCK;
		1516	req->sv2 = SvREFCNT_inc (data);
		1517	req->ptr2 = (char *)svptr + offset;
		1518	req->size = len;
		1519
		1520	REQ_SEND;
		1521	}
		1522	}
		1523
		1524	void
		1525	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1526	PPCODE:
		1527	{
		1528	dREQ;
		1529
		1530	req->type = EIO_MLOCKALL;
		1531	req->int1 = flags;
		1532
		1533	REQ_SEND;
		1534	}
		1535
		1536	void
		1537	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1538	PPCODE:
		1539	{
		1540	int fd = s_fileno_croak (fh, 0);
		1541	dREQ;
		1542
		1543	req->type = EIO_CUSTOM;
		1544	req->sv1 = newSVsv (fh);
		1545	req->int1 = fd;
		1546
		1547	req->feed = fiemap;
		1548	#if HAVE_FIEMAP
		1549	/* keep our fingers crossed that the next two types are 64 bit */
		1550	req->offs = start;
		1551	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1552	req->int2 = flags;
		1553	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1554	#endif
		1555
		1556	REQ_SEND;
		1557	}
		1558
		1559	void
		1560	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1561	PPCODE:
		1562	{
		1563	dREQ;
		1564
		1565	req->type = EIO_BUSY;
		1566	req->nv1 = delay < 0. ? 0. : delay;
		1567
		1568	REQ_SEND;
		1569	}
		1570
		1571	void
		1572	aio_group (SV *callback=&PL_sv_undef)
		1573	PPCODE:
		1574	{
		1575	dREQ;
		1576
		1577	req->type = EIO_GROUP;
		1578
		1579	req_submit (req);
		1580	XPUSHs (req_sv (req, aio_grp_stash));
		1581	}
		1582
		1583	void
		1584	aio_nop (SV *callback=&PL_sv_undef)
		1585	ALIAS:
		1586	aio_nop = EIO_NOP
		1587	aio_sync = EIO_SYNC
		1588	PPCODE:
		1589	{
		1590	dREQ;
		1591
		1592	req->type = ix;
		1593
		1594	REQ_SEND;
		1595	}
		1596
		1597	int
		1598	aioreq_pri (int pri = 0)
1037	CODE:	1599	CODE:
		1600	RETVAL = next_pri;
		1601	if (items > 0)
		1602	{
		1603	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1604	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1605	next_pri = pri;
		1606	}
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	void
		1611	aioreq_nice (int nice = 0)
		1612	CODE:
		1613	nice = next_pri - nice;
		1614	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1615	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1616	next_pri = nice;
		1617
		1618	void
		1619	flush ()
		1620	CODE:
1038	while (nreqs)	1621	while (eio_nreqs ())
1039	{	1622	{
1040	poll_wait ();	1623	poll_wait ();
1041	poll_cb ();	1624	poll_cb ();
1042	}	1625	}
1043		1626
1044	void	1627	int
1045	poll()	1628	poll ()
1046	PROTOTYPE:
1047	CODE:	1629	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1630	poll_wait ();
1051	poll_cb ();	1631	RETVAL = poll_cb ();
1052	}
1053
1054	int
1055	poll_fileno()
1056	PROTOTYPE:
1057	CODE:
1058	RETVAL = respipe [0];
1059	OUTPUT:	1632	OUTPUT:
1060	RETVAL	1633	RETVAL
1061		1634
1062	int	1635	int
		1636	poll_fileno ()
		1637	CODE:
		1638	RETVAL = s_epipe_fd (&respipe);
		1639	OUTPUT:
		1640	RETVAL
		1641
		1642	int
1063	poll_cb(...)	1643	poll_cb (...)
1064	PROTOTYPE:	1644	PROTOTYPE:
1065	CODE:	1645	CODE:
1066	RETVAL = poll_cb ();	1646	RETVAL = poll_cb ();
1067	OUTPUT:	1647	OUTPUT:
1068	RETVAL	1648	RETVAL
1069		1649
1070	void	1650	void
1071	poll_wait()	1651	poll_wait ()
1072	PROTOTYPE:
1073	CODE:	1652	CODE:
1074	if (nreqs)
1075	poll_wait ();	1653	poll_wait ();
1076		1654
1077	int	1655	int
1078	nreqs()	1656	nreqs ()
1079	PROTOTYPE:
1080	CODE:	1657	CODE:
1081	RETVAL = nreqs;	1658	RETVAL = eio_nreqs ();
1082	OUTPUT:	1659	OUTPUT:
1083	RETVAL	1660	RETVAL
1084		1661
		1662	int
		1663	nready ()
		1664	CODE:
		1665	RETVAL = eio_nready ();
		1666	OUTPUT:
		1667	RETVAL
		1668
		1669	int
		1670	npending ()
		1671	CODE:
		1672	RETVAL = eio_npending ();
		1673	OUTPUT:
		1674	RETVAL
		1675
		1676	int
		1677	nthreads ()
		1678	CODE:
		1679	RETVAL = eio_nthreads ();
		1680	OUTPUT:
		1681	RETVAL
		1682
		1683	int
		1684	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1685	CODE:
		1686	RETVAL = posix_fadvise (fh, offset, length, advice);
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	IV
		1691	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1692	CODE:
		1693	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	void
		1698	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1699	PPCODE:
		1700	sv_unmagic (scalar, MMAP_MAGIC);
		1701	{
		1702	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1703	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1704	if (addr == (void *)-1)
		1705	XSRETURN_NO;
		1706
		1707	sv_force_normal (scalar);
		1708
		1709	/* we store the length in mg_obj, as namlen is I32 :/ */
		1710	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1711	->mg_obj = (SV *)length;
		1712
		1713	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1714
		1715	if (!(prot & PROT_WRITE))
		1716	SvREADONLY_on (scalar);
		1717
		1718	if (SvLEN (scalar))
		1719	Safefree (SvPVX (scalar));
		1720
		1721	SvPVX (scalar) = (char *)addr;
		1722	SvCUR_set (scalar, length);
		1723	SvLEN_set (scalar, 0);
		1724	SvPOK_only (scalar);
		1725
		1726	XSRETURN_YES;
		1727	}
		1728
		1729	void
		1730	munmap (SV *scalar)
		1731	CODE:
		1732	sv_unmagic (scalar, MMAP_MAGIC);
		1733
		1734	int
		1735	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1736	ALIAS:
		1737	mprotect = 1
		1738	CODE:
		1739	{
		1740	STRLEN svlen;
		1741	void *addr = SvPVbyte (scalar, svlen);
		1742	size_t len = SvUV (length);
		1743
		1744	if (offset < 0)
		1745	offset += svlen;
		1746
		1747	if (offset < 0 || offset > svlen)
		1748	croak ("offset outside of scalar");
		1749
		1750	if (!SvOK (length) || len + offset > svlen)
		1751	len = svlen - offset;
		1752
		1753	addr = (void *)(((intptr_t)addr) + offset);
		1754	eio_page_align (&addr, &len);
		1755
		1756	switch (ix)
		1757	{
		1758	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1759	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1760	}
		1761	}
		1762	OUTPUT:
		1763	RETVAL
		1764
		1765	int
		1766	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1767	CODE:
		1768	{
		1769	STRLEN svlen;
		1770	void *addr = SvPVbyte (scalar, svlen);
		1771	size_t len = SvUV (length);
		1772
		1773	if (offset < 0)
		1774	offset += svlen;
		1775
		1776	if (offset < 0 || offset > svlen)
		1777	croak ("offset outside of scalar");
		1778
		1779	if (!SvOK (length) || len + offset > svlen)
		1780	len = svlen - offset;
		1781
		1782	addr = (void *)(((intptr_t)addr) + offset);
		1783	eio_page_align (&addr, &len);
		1784	#if _POSIX_MEMLOCK_RANGE
		1785	RETVAL = munlock (addr, len);
		1786	#else
		1787	RETVAL = EIO_ENOSYS ();
		1788	#endif
		1789	}
		1790	OUTPUT:
		1791	RETVAL
		1792
		1793	int
		1794	munlockall ()
		1795	CODE:
		1796	#if _POSIX_MEMLOCK
		1797	munlockall ();
		1798	#else
		1799	RETVAL = EIO_ENOSYS ();
		1800	#endif
		1801	OUTPUT:
		1802	RETVAL
		1803
		1804	int
		1805	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1806	CODE:
		1807	{
		1808	#if HAVE_LINUX_SPLICE
		1809	loff_t off_in_, off_out_;
		1810	RETVAL = splice (
		1811	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1812	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1813	length, flags
		1814	);
		1815	#else
		1816	RETVAL = EIO_ENOSYS ();
		1817	#endif
		1818	}
		1819	OUTPUT:
		1820	RETVAL
		1821
		1822	int
		1823	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1824	CODE:
		1825	#if HAVE_LINUX_SPLICE
		1826	RETVAL = tee (rfh, wfh, length, flags);
		1827	#else
		1828	RETVAL = EIO_ENOSYS ();
		1829	#endif
		1830	OUTPUT:
		1831	RETVAL
		1832
		1833	void _on_next_submit (SV *cb)
		1834	CODE:
		1835	SvREFCNT_dec (on_next_submit);
		1836	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1837
		1838	PROTOTYPES: DISABLE
		1839
		1840	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1841
		1842	BOOT:
		1843	{
		1844	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1845	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1846	}
		1847
		1848	void
		1849	DESTROY (SV *self)
		1850	CODE:
		1851	{
		1852	aio_wd wd = SvAIO_WD (self);
		1853	#if HAVE_AT
		1854	{
		1855	SV *callback = &PL_sv_undef;
		1856	dREQ; /* clobbers next_pri :/ */
		1857	next_pri = req->pri; /* restore next_pri */
		1858	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1859	req->type = EIO_WD_CLOSE;
		1860	req->wd = wd;
		1861	REQ_SEND;
		1862	}
		1863	#else
		1864	eio_wd_close_sync (wd);
		1865	#endif
		1866	}
		1867
		1868	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1869
		1870	void
		1871	cancel (aio_req_ornot req)
		1872	CODE:
		1873	eio_cancel (req);
		1874
		1875	void
		1876	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1877	PPCODE:
		1878	{
		1879	if (GIMME_V != G_VOID)
		1880	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1881
		1882	if (items > 1)
		1883	{
		1884	SV *cb_cv =get_cb (callback);
		1885
		1886	SvREFCNT_dec (req->callback);
		1887	req->callback = SvREFCNT_inc (cb_cv);
		1888	}
		1889	}
		1890
		1891	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1892
		1893	void
		1894	add (aio_req grp, ...)
		1895	PPCODE:
		1896	{
		1897	int i;
		1898
		1899	if (grp->int1 == 2)
		1900	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1901
		1902	for (i = 1; i < items; ++i )
		1903	{
		1904	aio_req req;
		1905
		1906	if (GIMME_V != G_VOID)
		1907	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1908
		1909	req = SvAIO_REQ (ST (i));
		1910
		1911	if (req)
		1912	eio_grp_add (grp, req);
		1913	}
		1914	}
		1915
		1916	void
		1917	cancel_subs (aio_req_ornot req)
		1918	CODE:
		1919	req_cancel_subs (req);
		1920
		1921	void
		1922	result (aio_req grp, ...)
		1923	CODE:
		1924	{
		1925	int i;
		1926	AV *av;
		1927
		1928	grp->errorno = errno;
		1929
		1930	av = newAV ();
		1931	av_extend (av, items - 1);
		1932
		1933	for (i = 1; i < items; ++i )
		1934	av_push (av, newSVsv (ST (i)));
		1935
		1936	SvREFCNT_dec (grp->sv1);
		1937	grp->sv1 = (SV *)av;
		1938	}
		1939
		1940	void
		1941	errno (aio_req grp, int errorno = errno)
		1942	CODE:
		1943	grp->errorno = errorno;
		1944
		1945	void
		1946	limit (aio_req grp, int limit)
		1947	CODE:
		1948	eio_grp_limit (grp, limit);
		1949
		1950	void
		1951	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1952	CODE:
		1953	{
		1954	SvREFCNT_dec (grp->sv2);
		1955	grp->sv2 = newSVsv (callback);
		1956	grp->feed = aio_grp_feed;
		1957
		1958	if (grp->int2 <= 0)
		1959	grp->int2 = 2;
		1960
		1961	eio_grp_limit (grp, grp->int2);
		1962	}
		1963

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