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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.219 by root, Fri Jul 27 18:43:25 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 <errno.h>
14	#include <sys/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
16	#include <limits.h>	16	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	17	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	18	#include <sched.h>
21		19
22	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
23	# 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>
24	# include <sys/sendfile.h>	82	#include <sys/select.h>
25	# elif __freebsd	83	#include <unistd.h>
26	# include <sys/socket.h>	84	#include <utime.h>
27	# include <sys/uio.h>	85	#include <signal.h>
28	# elif __hpux	86
29	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
30	# elif __solaris /* not yet */	88
31	# 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
32	# else	140	# else
33	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	142	# endif
35	#endif	143	#endif
36		144
37	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
38	#ifndef NAME_MAX	146	#include "def0.h"
39	# define NAME_MAX 4096
40	#endif
41		147
42	#if __ia64	148	#ifndef makedev
43	# define STACKSIZE 65536	149	# define makedev(maj,min) (((maj) << 8) | (min))
44	#else
45	# define STACKSIZE 8192
46	#endif	150	#endif
		151	#ifndef major
		152	# define major(dev) ((dev) >> 8)
		153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
47		157
48	enum {	158	#ifndef PAGESIZE
49	REQ_QUIT,	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
50	REQ_OPEN, REQ_CLOSE,	160	#endif
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};
59		161
60	typedef struct aio_cb {	162	/*****************************************************************************/
61	struct aio_cb *volatile next;
62
63	int type;
64
65	/* should receive a cleanup, with unions */
66	int fd, fd2;
67	off_t offset;
68	size_t length;
69	ssize_t result;
70	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76
77	Stat_t *statdata;
78	} aio_cb;
79
80	typedef aio_cb *aio_req;
81
82	static int started, wanted;
83	static volatile int nreqs;
84	static int max_outstanding = 1<<30;
85	static int respipe [2];
86
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90
91	static volatile aio_req reqs, reqe; /* queue start, queue end */
92	static volatile aio_req ress, rese; /* queue start, queue end */
93
94	static void free_req (aio_req req)
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98
99	if (req->fh)
100	SvREFCNT_dec (req->fh);
101
102	if (req->fh2)
103	SvREFCNT_dec (req->fh2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113
114	Safefree (req);
115	}
116		163
117	static void	164	static void
118	poll_wait ()	165	fiemap (eio_req *req)
119	{	166	{
120	if (nreqs && !ress)	167	req->result = -1;
121	{
122	fd_set rfd;
123	FD_ZERO(&rfd);
124	FD_SET(respipe [0], &rfd);
125		168
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	169	#if HAVE_FIEMAP
127	}
128	}
129
130	static int
131	poll_cb ()
132	{
133	dSP;
134	int count = 0;	170	int count = req->int3;
135	int do_croak = 0;	171
136	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 */
137		177
138	for (;;)	178	for (;;)
139	{	179	{
140	pthread_mutex_lock (&reslock);	180	struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
141	req = ress;	181	errno = ENOMEM;
142
143	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 < count)
		200	/* either autosizing succeeded,
		201	* or the file had no extents
		202	* or we luckily had enough space */
		203	break;
		204
		205	/* some kernels overwrite fm_length, so just reset everything */
		206	fiemap->fm_start = req->offs;
		207	fiemap->fm_length = req->size;
		208	fiemap->fm_flags = req->int2;
		209	fiemap->fm_extent_count = 0;
		210
		211	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		212	return;
		213
		214	/* to work around a kernel bug, we allocate one more */
		215	count = fiemap->fm_mapped_extents + 1;
		216
		217	free (fiemap);
		218	}
		219
		220	req->result = 0;
		221
		222	#else
		223	errno = ENOSYS;
		224	#endif
		225	}
		226
		227	/*****************************************************************************/
		228
		229	enum {
		230	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		231	};
		232
		233	typedef eio_req *aio_req;
		234	typedef eio_req *aio_req_ornot;
		235	typedef eio_wd aio_wd;
		236
		237	static SV *on_next_submit;
		238	static int next_pri = EIO_PRI_DEFAULT;
		239	static int max_outstanding;
		240
		241	static s_epipe respipe;
		242
		243	static void req_destroy (aio_req req);
		244	static void req_cancel (aio_req req);
		245
		246	static void
		247	want_poll (void)
		248	{
		249	/* write a dummy byte to the pipe so fh becomes ready */
		250	s_epipe_signal (&respipe);
		251	}
		252
		253	static void
		254	done_poll (void)
		255	{
		256	/* read any signals sent by the worker threads */
		257	s_epipe_drain (&respipe);
		258	}
		259
		260	/* must be called at most once */
		261	static SV *
		262	req_sv (aio_req req, HV *stash)
		263	{
		264	if (!req->self)
		265	{
		266	req->self = (SV *)newHV ();
		267	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		268	}
		269
		270	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		271	}
		272
		273	static SV *
		274	newSVaio_wd (aio_wd wd)
		275	{
		276	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		277	}
		278
		279	static aio_req
		280	SvAIO_REQ (SV *sv)
		281	{
		282	MAGIC *mg;
		283
		284	if (!SvROK (sv)
		285	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		286	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		287	&& SvSTASH (SvRV (sv)) != aio_req_stash
		288	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		289	croak ("object of class IO::AIO::REQ expected");
		290
		291	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		292
		293	return mg ? (aio_req)mg->mg_ptr : 0;
		294	}
		295
		296	static aio_wd
		297	SvAIO_WD (SV *sv)
		298	{
		299	if (!SvROK (sv)
		300	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		301	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		302	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		303
		304	return (aio_wd)(long)SvIVX (SvRV (sv));
		305	}
		306
		307	static void
		308	aio_grp_feed (aio_req grp)
		309	{
		310	if (grp->sv2 && SvOK (grp->sv2))
		311	{
		312	dSP;
		313
		314	ENTER;
		315	SAVETMPS;
		316	PUSHMARK (SP);
		317	XPUSHs (req_sv (grp, aio_grp_stash));
		318	PUTBACK;
		319	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		320	SPAGAIN;
		321	FREETMPS;
		322	LEAVE;
		323	}
		324	}
		325
		326	static void
		327	req_submit (eio_req *req)
		328	{
		329	eio_submit (req);
		330
		331	if (expect_false (on_next_submit))
		332	{
		333	dSP;
		334	SV *cb = sv_2mortal (on_next_submit);
		335
		336	on_next_submit = 0;
		337
		338	PUSHMARK (SP);
		339	PUTBACK;
		340	call_sv (cb, G_DISCARD | G_EVAL);
		341	}
		342	}
		343
		344	static int
		345	req_invoke (eio_req *req)
		346	{
		347	if (req->flags & FLAG_SV2_RO_OFF)
		348	SvREADONLY_off (req->sv2);
		349
		350	if (!EIO_CANCELLED (req) && req->callback)
		351	{
		352	dSP;
		353	static SV *sv_result_cache; /* caches the result integer SV */
		354	SV *sv_result;
		355
		356	ENTER;
		357	SAVETMPS;
		358	PUSHMARK (SP);
		359	EXTEND (SP, 1);
		360
		361	/* do not recreate the result IV from scratch each time */
		362	if (expect_true (sv_result_cache))
144	{	363	{
145	ress = req->next;	364	sv_result = sv_result_cache; sv_result_cache = 0;
146		365	SvIV_set (sv_result, req->result);
147	if (!ress)	366	SvIOK_only (sv_result);
148	{
149	/* read any signals sent by the worker threads */
150	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)
152	;
153
154	rese = 0;
155	}
156	}
157
158	pthread_mutex_unlock (&reslock);
159
160	if (!req)
161	break;
162
163	nreqs--;
164
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
181	PL_laststatval = req->result;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}
211	else
212	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}
229	}
230
231	if (SvOK (req->callback))
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}
249
250	free_req (req);
251	}
252
253	return count;
254	}
255
256	static void *aio_proc(void *arg);
257
258	static void
259	start_thread (void)
260	{
261	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}
277
278	static void
279	send_req (aio_req req)
280	{
281	while (started < wanted && nreqs >= started)
282	start_thread ();
283
284	nreqs++;
285
286	pthread_mutex_lock (&reqlock);
287
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}
312
313	static void
314	end_thread (void)
315	{
316	aio_req req;
317	Newz (0, req, 1, aio_cb);
318	req->type = REQ_QUIT;
319
320	send_req (req);
321	}
322
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}
348
349	static void create_pipe ()
350	{
351	if (pipe (respipe))
352	croak ("unable to initialize result pipe");
353
354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
355	croak ("cannot set result pipe to nonblocking mode");
356
357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
358	croak ("cannot set result pipe to nonblocking mode");
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static ssize_t
416	readahead (int fd, off_t offset, size_t count)
417	{
418	char readahead_buf[4096];
419
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r
435
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{
441	struct dirent *e;
442	int errorno;
443
444	pthread_mutex_lock (&readdirlock);
445
446	e = readdir (dirp);
447	errorno = errno;
448
449	if (e)
450	{
451	*res = ent;
452	strcpy (ent->d_name, e->d_name);
453	}
454	else
455	*res = 0;
456
457	pthread_mutex_unlock (&readdirlock);
458
459	errno = errorno;
460	return e ? 0 : -1;
461	}
462	#endif
463
464	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
467	{
468	ssize_t res;
469
470	if (!count)
471	return 0;
472
473	#if HAVE_SENDFILE
474	# if __linux
475	res = sendfile (ofd, ifd, &offset, count);
476
477	# elif __freebsd
478	/*
479	* Of course, the freebsd sendfile is a dire hack with no thoughts
480	* wasted on making it similar to other I/O functions.
481	*/
482	{
483	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485
486	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
488	res = sbytes;
489	}
490
491	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);
493
494	# elif __solaris
495	{
496	struct sendfilevec vec;
497	size_t sbytes;
498
499	vec.sfv_fd = ifd;
500	vec.sfv_flag = 0;
501	vec.sfv_off = offset;
502	vec.sfv_len = count;
503
504	res = sendfilev (ofd, &vec, 1, &sbytes);
505
506	if (res < 0 && sbytes)
507	res = sbytes;
508	}
509
510	# endif
511	#else
512	res = -1;
513	errno = ENOSYS;
514	#endif
515
516	if (res < 0
517	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
518	#if __solaris
519	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
520	#endif
521	)
522	)
523	{
524	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];
526	res = 0;
527
528	while (count)
529	{
530	ssize_t cnt;
531
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534	if (cnt <= 0)
535	{
536	if (cnt && !res) res = -1;
537	break;
538	}
539
540	cnt = write (ofd, buf, cnt);
541
542	if (cnt <= 0)
543	{
544	if (cnt && !res) res = -1;
545	break;
546	}
547
548	offset += cnt;
549	res += cnt;
550	count -= cnt;
551	}
552	}
553
554	return res;
555	}
556
557	/* read a full directory */
558	static int
559	scandir_ (const char *path, void **namesp)
560	{
561	DIR *dirp = opendir (path);
562	union
563	{
564	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;
567	struct dirent *entp;
568	char *name, *names;
569	int memlen = 4096;
570	int memofs = 0;
571	int res = 0;
572	int errorno;
573
574	if (!dirp)
575	return -1;
576
577	names = malloc (memlen);
578
579	for (;;)
580	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);
582
583	if (!entp)
584	break;
585
586	name = entp->d_name;
587
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{
590	int len = strlen (name) + 1;
591
592	res++;
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632
633	for (;;)
634	{
635	req = reqs;
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642
643	if (req)
644	break;
645
646	pthread_cond_wait (&reqwait, &reqlock);
647	}
648
649	pthread_mutex_unlock (&reqlock);
650
651	errno = 0; /* strictly unnecessary */
652
653	type = req->type;
654
655	switch (type)
656	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
662
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
678
679	case REQ_QUIT:
680	break;
681
682	default:
683	req->result = ENOSYS;
684	break;
685	}
686
687	req->errorno = errno;
688
689	pthread_mutex_lock (&reslock);
690
691	req->next = 0;
692
693	if (rese)
694	{
695	rese->next = req;
696	rese = req;
697	}	367	}
698	else	368	else
699	{	369	{
700	rese = ress = req;	370	sv_result = newSViv (req->result);
701		371	SvREADONLY_on (sv_result);
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}	372	}
705		373
706	pthread_mutex_unlock (&reslock);	374	switch (req->type)
		375	{
		376	case EIO_WD_OPEN:
		377	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		378	break;
		379
		380	case EIO_READDIR:
		381	{
		382	SV *rv = &PL_sv_undef;
		383
		384	if (req->result >= 0)
		385	{
		386	int i;
		387	char *names = (char *)req->ptr2;
		388	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		389	AV *av = newAV ();
		390
		391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
		394	{
		395	if (req->int1 & EIO_READDIR_DENTS)
		396	{
		397	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		398
		399	if (req->int1 & EIO_READDIR_CUSTOM2)
		400	{
		401	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		402	AV *avent = newAV ();
		403
		404	av_extend (avent, 2);
		405
		406	if (!sv_type [ent->type])
		407	{
		408	sv_type [ent->type] = newSViv (ent->type);
		409	SvREADONLY_on (sv_type [ent->type]);
		410	}
		411
		412	av_store (avent, 0, namesv);
		413	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		414	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		415
		416	av_store (av, i, newRV_noinc ((SV *)avent));
		417	}
		418	else
		419	av_store (av, i, namesv);
		420
		421	++ent;
		422	}
		423	else
		424	{
		425	SV *name = newSVpv (names, 0);
		426	av_store (av, i, name);
		427	names += SvCUR (name) + 1;
		428	}
		429	}
		430
		431	rv = sv_2mortal (newRV_noinc ((SV *)av));
		432	}
		433
		434	PUSHs (rv);
		435
		436	if (req->int1 & EIO_READDIR_CUSTOM1)
		437	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		438	}
		439	break;
		440
		441	case EIO_OPEN:
		442	{
		443	/* convert fd to fh */
		444	SV *fh = &PL_sv_undef;
		445
		446	if (req->result >= 0)
		447	{
		448	GV *gv = (GV *)sv_newmortal ();
		449	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		450	char sym [64];
		451	int symlen;
		452
		453	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		454	gv_init (gv, aio_stash, sym, symlen, 0);
		455
		456	symlen = snprintf (
		457	sym,
		458	sizeof (sym),
		459	"%s&=%d",
		460	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		461	(int)req->result
		462	);
		463
		464	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		465	fh = (SV *)gv;
		466	}
		467
		468	PUSHs (fh);
		469	}
		470	break;
		471
		472	case EIO_STATVFS:
		473	case EIO_FSTATVFS:
		474	{
		475	SV *rv = &PL_sv_undef;
		476
		477	#ifndef _WIN32
		478	if (req->result >= 0)
		479	{
		480	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		481	HV *hv = newHV ();
		482
		483	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		484
		485	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		486	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		487	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		488	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		489	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		490	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		491	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		492	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		493	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		494	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		495	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		496	}
		497	#endif
		498
		499	PUSHs (rv);
		500	}
		501
		502	break;
		503
		504	case EIO_GROUP:
		505	req->int1 = 2; /* mark group as finished */
		506
		507	if (req->sv1)
		508	{
		509	int i;
		510	AV *av = (AV *)req->sv1;
		511
		512	EXTEND (SP, AvFILL (av) + 1);
		513	for (i = 0; i <= AvFILL (av); ++i)
		514	PUSHs (*av_fetch (av, i, 0));
		515	}
		516	break;
		517
		518	case EIO_NOP:
		519	case EIO_BUSY:
		520	break;
		521
		522	case EIO_READLINK:
		523	case EIO_REALPATH:
		524	if (req->result > 0)
		525	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		526	break;
		527
		528	case EIO_STAT:
		529	case EIO_LSTAT:
		530	case EIO_FSTAT:
		531	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		532
		533	if (!(PL_laststatval = req->result))
		534	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		535	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		536
		537	PUSHs (sv_result);
		538	break;
		539
		540	case EIO_SEEK:
		541	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		542	break;
		543
		544	case EIO_READ:
		545	{
		546	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		547	*SvEND (req->sv2) = 0;
		548	SvPOK_only (req->sv2);
		549	SvSETMAGIC (req->sv2);
		550	PUSHs (sv_result);
		551	}
		552	break;
		553
		554	case EIO_CUSTOM:
		555	if (req->feed == fiemap)
		556	{
		557	#if HAVE_FIEMAP
		558	if (!req->result)
		559	{
		560	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		561
		562	if (fiemap->fm_extent_count)
		563	{
		564	AV *av = newAV ();
		565	int i;
		566
		567	while (fiemap->fm_mapped_extents)
		568	{
		569	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		570	AV *ext_av = newAV ();
		571
		572	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		573	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		574	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		575	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		576
		577	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		578	}
		579
		580	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		581	}
		582	else
		583	{
		584	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		585	PUSHs (sv_result);
		586	}
		587	}
		588	#endif
		589	}
		590	else
		591	PUSHs (sv_result);
		592	break;
		593
		594	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		595	if (req->result > 0)
		596	SvIV_set (sv_result, 0);
		597	/* FALLTHROUGH */
		598
		599	default:
		600	PUSHs (sv_result);
		601	break;
		602	}
		603
		604	errno = req->errorno;
		605
		606	PUTBACK;
		607	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		608	SPAGAIN;
		609
		610	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		611	SvREFCNT_dec (sv_result);
		612	else
		613	sv_result_cache = sv_result;
		614
		615	FREETMPS;
		616	LEAVE;
		617
		618	PUTBACK;
707	}	619	}
708	while (type != REQ_QUIT);	620
		621	return !!SvTRUE (ERRSV);
		622	}
		623
		624	static void
		625	req_destroy (aio_req req)
		626	{
		627	if (req->self)
		628	{
		629	sv_unmagic (req->self, PERL_MAGIC_ext);
		630	SvREFCNT_dec (req->self);
		631	}
		632
		633	SvREFCNT_dec (req->sv1);
		634	SvREFCNT_dec (req->sv2);
		635	SvREFCNT_dec (req->sv3);
		636	SvREFCNT_dec (req->sv4);
		637	SvREFCNT_dec (req->callback);
		638
		639	free (req);
		640	}
		641
		642	static void
		643	req_cancel_subs (aio_req grp)
		644	{
		645	if (grp->type != EIO_GROUP)
		646	return;
		647
		648	SvREFCNT_dec (grp->sv2);
		649	grp->sv2 = 0;
		650
		651	eio_grp_cancel (grp);
		652	}
		653
		654	static void ecb_cold
		655	create_respipe (void)
		656	{
		657	if (s_epipe_renew (&respipe))
		658	croak ("IO::AIO: unable to initialize result pipe");
		659	}
		660
		661	static void
		662	poll_wait (void)
		663	{
		664	while (eio_nreqs ())
		665	{
		666	int size;
		667
		668	X_LOCK (reslock);
		669	size = res_queue.size;
		670	X_UNLOCK (reslock);
		671
		672	if (size)
		673	return;
		674
		675	etp_maybe_start_thread ();
		676
		677	s_epipe_wait (&respipe);
		678	}
		679	}
		680
		681	static int
		682	poll_cb (void)
		683	{
		684	for (;;)
		685	{
		686	int res = eio_poll ();
		687
		688	if (res > 0)
		689	croak (0);
		690
		691	if (!max_outstanding || max_outstanding > eio_nreqs ())
		692	return res;
		693
		694	poll_wait ();
		695	}
		696	}
		697
		698	static void ecb_cold
		699	reinit (void)
		700	{
		701	create_respipe ();
		702
		703	if (eio_init (want_poll, done_poll) < 0)
		704	croak ("IO::AIO: unable to initialise eio library");
		705	}
		706
		707	/*****************************************************************************/
		708
		709	#if !_POSIX_MAPPED_FILES
		710	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		711	# define munmap(addr,length) EIO_ENOSYS ()
		712	#endif
		713
		714	#if !_POSIX_MEMORY_PROTECTION
		715	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		716	# define PROT_NONE 0
		717	# define PROT_WRITE 0
		718	# define MAP_PRIVATE 0
		719	# define MAP_SHARED 0
		720	# define MAP_FIXED 0
		721	#endif
		722
		723	#define MMAP_MAGIC PERL_MAGIC_ext
		724
		725	static int ecb_cold
		726	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		727	{
		728	int old_errno = errno;
		729	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		730	errno = old_errno;
		731
		732	mg->mg_obj = 0; /* just in case */
		733
		734	SvREADONLY_off (sv);
		735
		736	if (SvPVX (sv) != mg->mg_ptr)
		737	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		738
		739	SvCUR_set (sv, 0);
		740	SvPVX (sv) = 0;
		741	SvOK_off (sv);
709		742
710	return 0;	743	return 0;
711	}	744	}
712		745
		746	static MGVTBL mmap_vtbl = {
		747	0, 0, 0, 0, mmap_free
		748	};
		749
713	/*****************************************************************************/	750	/*****************************************************************************/
714		751
715	static void atfork_prepare (void)	752	static SV *
		753	get_cb (SV *cb_sv)
716	{	754	{
717	pthread_mutex_lock (&reqlock);	755	SvGETMAGIC (cb_sv);
718	pthread_mutex_lock (&reslock);	756	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
719	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);
721	#endif
722	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);
724	#endif
725	}	757	}
726		758
727	static void atfork_parent (void)	759	static aio_req ecb_noinline
		760	dreq (SV *callback)
728	{	761	{
729	#if !HAVE_READDIR_R	762	SV *cb_cv;
730	pthread_mutex_unlock (&readdirlock);
731	#endif
732	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);
734	#endif
735	pthread_mutex_unlock (&reslock);
736	pthread_mutex_unlock (&reqlock);
737	}
738
739	static void atfork_child (void)
740	{
741	aio_req prv;	763	aio_req req;
		764	int req_pri = next_pri;
		765	next_pri = EIO_PRI_DEFAULT;
742		766
743	started = 0;	767	cb_cv = get_cb (callback);
744		768
745	while (reqs)	769	req = calloc (sizeof (*req), 1);
		770	if (!req)
		771	croak ("out of memory during eio_req allocation");
		772
		773	req->callback = SvREFCNT_inc (cb_cv);
		774	req->pri = req_pri;
		775
		776	return req;
		777	}
		778
		779	#define dREQ \
		780	aio_req req = dreq (callback); \
		781
		782	#define REQ_SEND \
		783	PUTBACK; \
		784	req_submit (req); \
		785	SPAGAIN; \
		786	\
		787	if (GIMME_V != G_VOID) \
		788	XPUSHs (req_sv (req, aio_req_stash));
		789
		790	ecb_inline void
		791	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		792	{
		793	if (expect_false (SvROK (path)))
746	{	794	{
747	prv = reqs;	795	SV *rv = SvRV (path);
748	reqs = prv->next;	796	SV *wdob;
749	free_req (prv);	797
		798	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		799	{
		800	path = AvARRAY (rv)[1];
		801	wdob = AvARRAY (rv)[0];
		802
		803	if (SvOK (wdob))
		804	{
		805	*wd = SvAIO_WD (wdob);
		806	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		807	}
		808	else
		809	*wd = EIO_INVALID_WD;
		810	}
		811	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		812	{
		813	*wd = (aio_wd)(long)SvIVX (rv);
		814	*wdsv = SvREFCNT_inc_NN (rv);
		815	*ptr = ".";
		816	return; /* path set to "." */
		817	}
		818	else
		819	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
750	}	820	}
751		821
752	reqs = reqe = 0;	822	*pathsv = newSVsv (path);
753		823	*ptr = SvPVbyte_nolen (*pathsv);
754	while (ress)	824	}
		825
		826	static void ecb_noinline
		827	req_set_path1 (aio_req req, SV *path)
		828	{
		829	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		830	}
		831
		832	static void ecb_noinline
		833	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		834	{
		835	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		836
		837	switch (SvTYPE (rv))
755	{	838	{
756	prv = ress;	839	case SVt_PVIO:
757	ress = prv->next;	840	case SVt_PVLV:
758	free_req (prv);	841	case SVt_PVGV:
		842	req->type = type_fh;
		843	req->sv1 = newSVsv (fh_or_path);
		844	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		845	break;
		846
		847	default:
		848	req->type = type_path;
		849	req_set_path1 (req, fh_or_path);
		850	break;
759	}	851	}
760
761	ress = rese = 0;
762
763	close (respipe [0]);
764	close (respipe [1]);
765	create_pipe ();
766
767	atfork_parent ();
768	}	852	}
769		853
770	#define dREQ \	854	XS(boot_IO__AIO) ecb_cold;
771	aio_req req; \	855
772	\
773	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \
775	\
776	Newz (0, req, 1, aio_cb); \
777	if (!req) \
778	croak ("out of memory during aio_req allocation"); \
779	\
780	req->callback = newSVsv (callback);
781
782	MODULE = IO::AIO PACKAGE = IO::AIO	856	MODULE = IO::AIO PACKAGE = IO::AIO
783		857
784	PROTOTYPES: ENABLE	858	PROTOTYPES: ENABLE
785		859
786	BOOT:	860	BOOT:
787	{	861	{
		862	static const struct {
		863	const char *name;
		864	IV iv;
		865	} *civ, const_iv[] = {
		866	# define const_niv(name, value) { # name, (IV) value },
		867	# define const_iv(name) { # name, (IV) name },
		868	# define const_eio(name) { # name, (IV) EIO_ ## name },
		869
		870	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		871
		872	const_iv (ENOSYS)
		873	const_iv (EXDEV)
		874	const_iv (EBADR)
		875
		876	const_iv (O_RDONLY)
		877	const_iv (O_WRONLY)
		878	const_iv (O_RDWR)
		879	const_iv (O_CREAT)
		880	const_iv (O_TRUNC)
		881	const_iv (O_EXCL)
		882	const_iv (O_APPEND)
		883
		884	const_iv (O_ASYNC)
		885	const_iv (O_DIRECT)
		886	const_iv (O_NOATIME)
		887
		888	const_iv (O_CLOEXEC)
		889	const_iv (O_NOCTTY)
		890	const_iv (O_NOFOLLOW)
		891	const_iv (O_NONBLOCK)
		892	const_iv (O_EXEC)
		893	const_iv (O_SEARCH)
		894	const_iv (O_DIRECTORY)
		895	const_iv (O_DSYNC)
		896	const_iv (O_RSYNC)
		897	const_iv (O_SYNC)
		898	const_iv (O_TTY_INIT)
		899
		900	const_iv (S_IFIFO)
		901	const_iv (S_IFCHR)
		902	const_iv (S_IFBLK)
		903	const_iv (S_IFLNK)
		904	const_iv (S_IFREG)
		905	const_iv (S_IFDIR)
		906	const_iv (S_IFWHT)
		907	const_iv (S_IFSOCK)
		908	const_iv (S_IFMT)
		909
		910	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		911	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		912	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		913	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		914	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		915	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		916
		917	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		918	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		919	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		920	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		921	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		922
		923	const_iv (ST_RDONLY)
		924	const_iv (ST_NOSUID)
		925	const_iv (ST_NODEV)
		926	const_iv (ST_NOEXEC)
		927	const_iv (ST_SYNCHRONOUS)
		928	const_iv (ST_MANDLOCK)
		929	const_iv (ST_WRITE)
		930	const_iv (ST_APPEND)
		931	const_iv (ST_IMMUTABLE)
		932	const_iv (ST_NOATIME)
		933	const_iv (ST_NODIRATIME)
		934	const_iv (ST_RELATIME)
		935
		936	const_iv (PROT_NONE)
		937	const_iv (PROT_EXEC)
		938	const_iv (PROT_READ)
		939	const_iv (PROT_WRITE)
		940
		941	/*const_iv (MAP_FIXED)*/
		942	const_iv (MAP_PRIVATE)
		943	const_iv (MAP_SHARED)
		944	const_iv (MAP_ANONYMOUS)
		945
		946	/* linuxish */
		947	const_iv (MAP_HUGETLB)
		948	const_iv (MAP_LOCKED)
		949	const_iv (MAP_NORESERVE)
		950	const_iv (MAP_POPULATE)
		951	const_iv (MAP_NONBLOCK)
		952
		953	const_iv (FIEMAP_FLAG_SYNC)
		954	const_iv (FIEMAP_FLAG_XATTR)
		955	const_iv (FIEMAP_FLAGS_COMPAT)
		956	const_iv (FIEMAP_EXTENT_LAST)
		957	const_iv (FIEMAP_EXTENT_UNKNOWN)
		958	const_iv (FIEMAP_EXTENT_DELALLOC)
		959	const_iv (FIEMAP_EXTENT_ENCODED)
		960	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		961	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		962	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		963	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		964	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		965	const_iv (FIEMAP_EXTENT_MERGED)
		966	const_iv (FIEMAP_EXTENT_SHARED)
		967
		968	const_iv (SPLICE_F_MOVE)
		969	const_iv (SPLICE_F_NONBLOCK)
		970	const_iv (SPLICE_F_MORE)
		971	const_iv (SPLICE_F_GIFT)
		972
		973	const_iv (SEEK_DATA)
		974	const_iv (SEEK_HOLE)
		975
		976	/* libeio constants */
		977	const_eio (SEEK_SET)
		978	const_eio (SEEK_CUR)
		979	const_eio (SEEK_END)
		980
		981	const_eio (MCL_FUTURE)
		982	const_eio (MCL_CURRENT)
		983
		984	const_eio (MS_ASYNC)
		985	const_eio (MS_INVALIDATE)
		986	const_eio (MS_SYNC)
		987
		988	const_eio (MT_MODIFY)
		989
		990	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		991	const_eio (SYNC_FILE_RANGE_WRITE)
		992	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		993
		994	const_eio (FALLOC_FL_KEEP_SIZE)
		995	const_eio (FALLOC_FL_PUNCH_HOLE)
		996
		997	const_eio (READDIR_DENTS)
		998	const_eio (READDIR_DIRS_FIRST)
		999	const_eio (READDIR_STAT_ORDER)
		1000	const_eio (READDIR_FOUND_UNKNOWN)
		1001
		1002	const_eio (DT_UNKNOWN)
		1003	const_eio (DT_FIFO)
		1004	const_eio (DT_CHR)
		1005	const_eio (DT_DIR)
		1006	const_eio (DT_BLK)
		1007	const_eio (DT_REG)
		1008	const_eio (DT_LNK)
		1009	const_eio (DT_SOCK)
		1010	const_eio (DT_WHT)
		1011	};
		1012
788	HV *stash = gv_stashpv ("IO::AIO", 1);	1013	aio_stash = gv_stashpv ("IO::AIO" , 1);
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1014	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1015	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1016	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
792		1017
793	create_pipe ();	1018	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1019	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
795	}
796		1020
		1021	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1022
		1023	reinit ();
		1024	}
		1025
797	void	1026	void
798	min_parallel (nthreads)	1027	reinit ()
799	int nthreads	1028	PROTOTYPE:
		1029
		1030	void
		1031	max_poll_reqs (unsigned int nreqs)
800	PROTOTYPE: $	1032	PROTOTYPE: $
		1033	CODE:
		1034	eio_set_max_poll_reqs (nreqs);
801		1035
802	void	1036	void
803	max_parallel (nthreads)	1037	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	1038	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	1039	CODE:
812	RETVAL = max_outstanding;	1040	eio_set_max_poll_time (nseconds);
		1041
		1042	void
		1043	min_parallel (unsigned int nthreads)
		1044	PROTOTYPE: $
		1045	CODE:
		1046	eio_set_min_parallel (nthreads);
		1047
		1048	void
		1049	max_parallel (unsigned int nthreads)
		1050	PROTOTYPE: $
		1051	CODE:
		1052	eio_set_max_parallel (nthreads);
		1053
		1054	void
		1055	max_idle (unsigned int nthreads)
		1056	PROTOTYPE: $
		1057	CODE:
		1058	eio_set_max_idle (nthreads);
		1059
		1060	void
		1061	idle_timeout (unsigned int seconds)
		1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_idle_timeout (seconds);
		1065
		1066	void
		1067	max_outstanding (unsigned int maxreqs)
		1068	PROTOTYPE: $
		1069	CODE:
813	max_outstanding = nreqs;	1070	max_outstanding = maxreqs;
814		1071
815	void	1072	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1073	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
817	SV * pathname
818	int flags
819	int mode
820	SV * callback
821	PROTOTYPE: $$$;$
822	CODE:	1074	PPCODE:
823	{	1075	{
824	dREQ;	1076	dREQ;
825		1077
		1078	req->type = EIO_WD_OPEN;
		1079	req_set_path1 (req, pathname);
		1080
		1081	REQ_SEND;
		1082	}
		1083
		1084	void
		1085	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1086	PPCODE:
		1087	{
		1088	dREQ;
		1089
826	req->type = REQ_OPEN;	1090	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	1091	req_set_path1 (req, pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1092	req->int1 = flags;
830	req->mode = mode;	1093	req->int2 = mode;
831		1094
832	send_req (req);	1095	REQ_SEND;
833	}	1096	}
834		1097
835	void	1098	void
836	aio_close (fh,callback=&PL_sv_undef)	1099	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$
840	ALIAS:	1100	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1101	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1102	aio_fdatasync = EIO_FDATASYNC
		1103	aio_syncfs = EIO_SYNCFS
844	CODE:	1104	PPCODE:
845	{	1105	{
		1106	int fd = s_fileno_croak (fh, 0);
846	dREQ;	1107	dREQ;
847		1108
848	req->type = ix;	1109	req->type = ix;
849	req->fh = newSVsv (fh);	1110	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1111	req->int1 = fd;
851		1112
852	send_req (req);	1113	REQ_SEND;
853	}	1114	}
854		1115
855	void	1116	void
		1117	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1118	PPCODE:
		1119	{
		1120	int fd = s_fileno_croak (fh, 0);
		1121	dREQ;
		1122
		1123	req->type = EIO_SYNC_FILE_RANGE;
		1124	req->sv1 = newSVsv (fh);
		1125	req->int1 = fd;
		1126	req->offs = offset;
		1127	req->size = nbytes;
		1128	req->int2 = flags;
		1129
		1130	REQ_SEND;
		1131	}
		1132
		1133	void
		1134	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1135	PPCODE:
		1136	{
		1137	int fd = s_fileno_croak (fh, 0);
		1138	dREQ;
		1139
		1140	req->type = EIO_FALLOCATE;
		1141	req->sv1 = newSVsv (fh);
		1142	req->int1 = fd;
		1143	req->int2 = mode;
		1144	req->offs = offset;
		1145	req->size = len;
		1146
		1147	REQ_SEND;
		1148	}
		1149
		1150	void
		1151	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1152	PPCODE:
		1153	{
		1154	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1155	int fd = s_fileno_croak (fh, 0);
		1156	dREQ;
		1157
		1158	if (expect_false (close_fd < 0))
		1159	{
		1160	int pipefd [2];
		1161
		1162	if (
		1163	#ifdef _WIN32
		1164	_pipe (pipefd, 1, _O_BINARY) < 0
		1165	#else
		1166	pipe (pipefd) < 0
		1167	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1168	#endif
		1169	|| close (pipefd [1]) < 0
		1170	)
		1171	abort (); /*D*/
		1172
		1173	close_fd = pipefd [0];
		1174	}
		1175
		1176	req->type = EIO_DUP2;
		1177	req->int1 = close_fd;
		1178	req->sv2 = newSVsv (fh);
		1179	req->int2 = fd;
		1180
		1181	REQ_SEND;
		1182	}
		1183
		1184	void
		1185	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1186	PPCODE:
		1187	{
		1188	int fd = s_fileno_croak (fh, 0);
		1189	dREQ;
		1190
		1191	req->type = EIO_SEEK;
		1192	req->sv1 = newSVsv (fh);
		1193	req->int1 = fd;
		1194	req->offs = SvVAL64 (offset);
		1195	req->int2 = whence;
		1196
		1197	REQ_SEND;
		1198	}
		1199
		1200	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1201	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
857	SV * fh
858	UV offset
859	UV length
860	SV * data
861	UV dataoffset
862	SV * callback
863	ALIAS:	1202	ALIAS:
864	aio_read = REQ_READ	1203	aio_read = EIO_READ
865	aio_write = REQ_WRITE	1204	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$
867	CODE:	1205	PPCODE:
868	{	1206	{
869	aio_req req;
870	STRLEN svlen;	1207	STRLEN svlen;
		1208	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	1209	char *svptr = SvPVbyte (data, svlen);
872		1210	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		1211
876	if (dataoffset < 0)	1212	if (dataoffset < 0)
877	dataoffset += svlen;	1213	dataoffset += svlen;
878		1214
879	if (dataoffset < 0 || dataoffset > svlen)	1215	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	1216	croak ("dataoffset outside of data scalar");
881		1217
882	if (ix == REQ_WRITE)	1218	if (ix == EIO_WRITE)
883	{	1219	{
884	/* write: check length and adjust. */	1220	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	1221	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	1222	len = svlen - dataoffset;
887	}	1223	}
888	else	1224	else
889	{	1225	{
890	/* read: grow scalar as necessary */	1226	/* read: check type and grow scalar as necessary */
		1227	SvUPGRADE (data, SVt_PV);
		1228	if (SvLEN (data) >= SvCUR (data))
891	svptr = SvGROW (data, length + dataoffset);	1229	svptr = SvGROW (data, len + dataoffset + 1);
		1230	else if (SvCUR (data) < len + dataoffset)
		1231	croak ("length + dataoffset outside of scalar, and cannot grow");
892	}	1232	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		1233
897	{	1234	{
898	dREQ;	1235	dREQ;
899		1236
900	req->type = ix;	1237	req->type = ix;
901	req->fh = newSVsv (fh);	1238	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1239	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	1240	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	1241	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	1242	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	1243	req->ptr2 = (char *)svptr + dataoffset;
		1244	req->stroffset = dataoffset;
908		1245
909	if (!SvREADONLY (data))	1246	if (!SvREADONLY (data))
910	{	1247	{
911	SvREADONLY_on (data);	1248	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1249	req->flags |= FLAG_SV2_RO_OFF;
913	}	1250	}
914		1251
915	send_req (req);	1252	REQ_SEND;
916	}	1253	}
917	}	1254	}
918		1255
919	void	1256	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1257	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
921	SV * out_fh	1258	ALIAS:
922	SV * in_fh	1259	aio_readlink = EIO_READLINK
923	UV in_offset	1260	aio_realpath = EIO_REALPATH
924	UV length
925	SV * callback
926	PROTOTYPE: $$$$;$
927	CODE:	1261	PPCODE:
928	{	1262	{
		1263	dREQ;
		1264
		1265	req->type = ix;
		1266	req_set_path1 (req, pathname);
		1267
		1268	REQ_SEND;
		1269	}
		1270
		1271	void
		1272	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1273	PPCODE:
		1274	{
		1275	int ifd = s_fileno_croak (in_fh , 0);
		1276	int ofd = s_fileno_croak (out_fh, 1);
929	dREQ;	1277	dREQ;
930		1278
931	req->type = REQ_SENDFILE;	1279	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	1280	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1281	req->int1 = ofd;
934	req->fh2 = newSVsv (in_fh);	1282	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1283	req->int2 = ifd;
936	req->offset = in_offset;	1284	req->offs = in_offset;
937	req->length = length;	1285	req->size = length;
938		1286
939	send_req (req);	1287	REQ_SEND;
940	}	1288	}
941		1289
942	void	1290	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1291	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$
949	CODE:	1292	PPCODE:
950	{	1293	{
		1294	int fd = s_fileno_croak (fh, 0);
951	dREQ;	1295	dREQ;
952		1296
953	req->type = REQ_READAHEAD;	1297	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	1298	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1299	req->int1 = fd;
956	req->offset = offset;	1300	req->offs = offset;
957	req->length = length;	1301	req->size = length;
958		1302
959	send_req (req);	1303	REQ_SEND;
960	}	1304	}
961		1305
962	void	1306	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1307	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	1308	ALIAS:
967	aio_stat = REQ_STAT	1309	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	1310	aio_lstat = EIO_LSTAT
		1311	aio_statvfs = EIO_STATVFS
		1312	PPCODE:
		1313	{
		1314	dREQ;
		1315
		1316	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1317
		1318	REQ_SEND;
		1319	}
		1320
		1321	UV
		1322	major (UV dev)
		1323	ALIAS:
		1324	minor = 1
969	CODE:	1325	CODE:
		1326	RETVAL = ix ? major (dev) : minor (dev);
		1327	OUTPUT:
		1328	RETVAL
		1329
		1330	UV
		1331	makedev (UV maj, UV min)
		1332	CODE:
		1333	RETVAL = makedev (maj, min);
		1334	OUTPUT:
		1335	RETVAL
		1336
		1337	void
		1338	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1339	PPCODE:
970	{	1340	{
971	dREQ;	1341	dREQ;
972		1342
973	New (0, req->statdata, 1, Stat_t);	1343	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
974	if (!req->statdata)	1344	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
975	{	1345	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
976	free_req (req);
977	croak ("out of memory during aio_req->statdata allocation");
978	}
979		1346
980	if (SvPOK (fh_or_path))	1347	REQ_SEND;
981	{
982	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);
985	}
986	else
987	{
988	req->type = REQ_FSTAT;
989	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}
992
993	send_req (req);
994	}	1348	}
995		1349
996	void	1350	void
		1351	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1352	PPCODE:
		1353	{
		1354	dREQ;
		1355
		1356	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1357	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1358
		1359	REQ_SEND;
		1360	}
		1361
		1362	void
		1363	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1364	PPCODE:
		1365	{
		1366	dREQ;
		1367
		1368	req->int2 = mode;
		1369	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1370
		1371	REQ_SEND;
		1372	}
		1373
		1374	void
		1375	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1376	PPCODE:
		1377	{
		1378	dREQ;
		1379
		1380	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1381	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1382	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1383
		1384	REQ_SEND;
		1385	}
		1386
		1387	void
		1388	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1389	PPCODE:
		1390	{
		1391	dREQ;
		1392
		1393	req->type = EIO_READDIR;
		1394	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1395
		1396	if (flags & EIO_READDIR_DENTS)
		1397	req->int1 |= EIO_READDIR_CUSTOM2;
		1398
		1399	req_set_path1 (req, pathname);
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	void
		1405	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1406	PPCODE:
		1407	{
		1408	dREQ;
		1409
		1410	req->type = EIO_MKDIR;
		1411	req->int2 = mode;
		1412	req_set_path1 (req, pathname);
		1413
		1414	REQ_SEND;
		1415	}
		1416
		1417	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1418	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1419	ALIAS:
1001	aio_unlink = REQ_UNLINK	1420	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	1421	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	1422	aio_readdir = EIO_READDIR
1004	CODE:	1423	PPCODE:
1005	{	1424	{
1006	dREQ;	1425	dREQ;
1007		1426
1008	req->type = ix;	1427	req->type = ix;
1009	req->data = newSVsv (pathname);	1428	req_set_path1 (req, pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);
1011
1012	send_req (req);
1013	}
1014		1429
		1430	REQ_SEND;
		1431	}
		1432
1015	void	1433	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1434	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	1435	ALIAS:
1021	aio_link = REQ_LINK	1436	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	1437	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	1438	aio_rename = EIO_RENAME
1024	CODE:	1439	PPCODE:
1025	{	1440	{
		1441	eio_wd wd2 = 0;
1026	dREQ;	1442	dREQ;
1027		1443
1028	req->type = ix;	1444	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1445	req_set_path1 (req, oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1446	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1031	req->data = newSVsv (newpath);	1447	req->int3 = (long)wd2;
1032	req->dataptr = SvPVbyte_nolen (req->data);
1033		1448
1034	send_req (req);	1449	REQ_SEND;
1035	}	1450	}
1036		1451
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	1452	void
1041	cancel_most_requests ()	1453	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1042	PROTOTYPE:	1454	PPCODE:
		1455	{
		1456	dREQ;
		1457
		1458	req->type = EIO_MKNOD;
		1459	req->int2 = (mode_t)mode;
		1460	req->offs = dev;
		1461	req_set_path1 (req, pathname);
		1462
		1463	REQ_SEND;
		1464	}
		1465
		1466	void
		1467	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1468	ALIAS:
		1469	aio_mtouch = EIO_MTOUCH
		1470	aio_msync = EIO_MSYNC
1043	CODE:	1471	PPCODE:
1044	{	1472	{
1045	aio_req *req;	1473	STRLEN svlen;
		1474	char *svptr = SvPVbyte (data, svlen);
		1475	UV len = SvUV (length);
1046		1476
1047	pthread_mutex_lock (&reqlock);	1477	if (offset < 0)
1048	for (req = reqs; req; req = req->next)	1478	offset += svlen;
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		1479
1052	pthread_mutex_lock (&reslock);	1480	if (offset < 0 || offset > svlen)
1053	for (req = ress; req; req = req->next)	1481	croak ("offset outside of scalar");
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}
1057		1482
		1483	if (!SvOK (length) || len + offset > svlen)
		1484	len = svlen - offset;
		1485
		1486	{
		1487	dREQ;
		1488
		1489	req->type = ix;
		1490	req->sv2 = SvREFCNT_inc (data);
		1491	req->ptr2 = (char *)svptr + offset;
		1492	req->size = len;
		1493	req->int1 = flags;
		1494
		1495	REQ_SEND;
		1496	}
		1497	}
		1498
		1499	void
		1500	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1501	PPCODE:
		1502	{
		1503	STRLEN svlen;
		1504	char *svptr = SvPVbyte (data, svlen);
		1505	UV len = SvUV (length);
		1506
		1507	if (offset < 0)
		1508	offset += svlen;
		1509
		1510	if (offset < 0 || offset > svlen)
		1511	croak ("offset outside of scalar");
		1512
		1513	if (!SvOK (length) || len + offset > svlen)
		1514	len = svlen - offset;
		1515
		1516	{
		1517	dREQ;
		1518
		1519	req->type = EIO_MLOCK;
		1520	req->sv2 = SvREFCNT_inc (data);
		1521	req->ptr2 = (char *)svptr + offset;
		1522	req->size = len;
		1523
		1524	REQ_SEND;
		1525	}
		1526	}
		1527
		1528	void
		1529	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1530	PPCODE:
		1531	{
		1532	dREQ;
		1533
		1534	req->type = EIO_MLOCKALL;
		1535	req->int1 = flags;
		1536
		1537	REQ_SEND;
		1538	}
		1539
		1540	void
		1541	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1542	PPCODE:
		1543	{
		1544	int fd = s_fileno_croak (fh, 0);
		1545	dREQ;
		1546
		1547	req->type = EIO_CUSTOM;
		1548	req->sv1 = newSVsv (fh);
		1549	req->int1 = fd;
		1550
		1551	req->feed = fiemap;
		1552	#if HAVE_FIEMAP
		1553	/* keep our fingers crossed that the next two types are 64 bit */
		1554	req->offs = start;
		1555	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1556	req->int2 = flags;
		1557	req->int3 = SvOK (count) ? SvIV (count) : -1;
1058	#endif	1558	#endif
		1559
		1560	REQ_SEND;
		1561	}
		1562
		1563	void
		1564	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1565	PPCODE:
		1566	{
		1567	dREQ;
		1568
		1569	req->type = EIO_BUSY;
		1570	req->nv1 = delay < 0. ? 0. : delay;
		1571
		1572	REQ_SEND;
		1573	}
		1574
		1575	void
		1576	aio_group (SV *callback=&PL_sv_undef)
		1577	PPCODE:
		1578	{
		1579	dREQ;
		1580
		1581	req->type = EIO_GROUP;
		1582
		1583	req_submit (req);
		1584	XPUSHs (req_sv (req, aio_grp_stash));
		1585	}
		1586
		1587	void
		1588	aio_nop (SV *callback=&PL_sv_undef)
		1589	ALIAS:
		1590	aio_nop = EIO_NOP
		1591	aio_sync = EIO_SYNC
		1592	PPCODE:
		1593	{
		1594	dREQ;
		1595
		1596	req->type = ix;
		1597
		1598	REQ_SEND;
		1599	}
		1600
		1601	int
		1602	aioreq_pri (int pri = 0)
		1603	CODE:
		1604	RETVAL = next_pri;
		1605	if (items > 0)
		1606	{
		1607	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1608	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1609	next_pri = pri;
		1610	}
		1611	OUTPUT:
		1612	RETVAL
		1613
		1614	void
		1615	aioreq_nice (int nice = 0)
		1616	CODE:
		1617	nice = next_pri - nice;
		1618	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1619	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1620	next_pri = nice;
1059		1621
1060	void	1622	void
1061	flush ()	1623	flush ()
1062	PROTOTYPE:
1063	CODE:	1624	CODE:
1064	while (nreqs)	1625	while (eio_nreqs ())
1065	{	1626	{
1066	poll_wait ();	1627	poll_wait ();
1067	poll_cb ();	1628	poll_cb ();
1068	}	1629	}
1069		1630
1070	void	1631	int
1071	poll()	1632	poll ()
1072	PROTOTYPE:
1073	CODE:	1633	CODE:
1074	if (nreqs)
1075	{
1076	poll_wait ();	1634	poll_wait ();
1077	poll_cb ();	1635	RETVAL = poll_cb ();
1078	}
1079
1080	int
1081	poll_fileno()
1082	PROTOTYPE:
1083	CODE:
1084	RETVAL = respipe [0];
1085	OUTPUT:	1636	OUTPUT:
1086	RETVAL	1637	RETVAL
1087		1638
1088	int	1639	int
		1640	poll_fileno ()
		1641	CODE:
		1642	RETVAL = s_epipe_fd (&respipe);
		1643	OUTPUT:
		1644	RETVAL
		1645
		1646	int
1089	poll_cb(...)	1647	poll_cb (...)
1090	PROTOTYPE:	1648	PROTOTYPE:
1091	CODE:	1649	CODE:
1092	RETVAL = poll_cb ();	1650	RETVAL = poll_cb ();
1093	OUTPUT:	1651	OUTPUT:
1094	RETVAL	1652	RETVAL
1095		1653
1096	void	1654	void
1097	poll_wait()	1655	poll_wait ()
1098	PROTOTYPE:
1099	CODE:	1656	CODE:
1100	if (nreqs)
1101	poll_wait ();	1657	poll_wait ();
1102		1658
1103	int	1659	int
1104	nreqs()	1660	nreqs ()
1105	PROTOTYPE:
1106	CODE:	1661	CODE:
1107	RETVAL = nreqs;	1662	RETVAL = eio_nreqs ();
1108	OUTPUT:	1663	OUTPUT:
1109	RETVAL	1664	RETVAL
1110		1665
		1666	int
		1667	nready ()
		1668	CODE:
		1669	RETVAL = eio_nready ();
		1670	OUTPUT:
		1671	RETVAL
		1672
		1673	int
		1674	npending ()
		1675	CODE:
		1676	RETVAL = eio_npending ();
		1677	OUTPUT:
		1678	RETVAL
		1679
		1680	int
		1681	nthreads ()
		1682	CODE:
		1683	RETVAL = eio_nthreads ();
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	int
		1688	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1689	CODE:
		1690	RETVAL = posix_fadvise (fh, offset, length, advice);
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	IV
		1695	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1696	CODE:
		1697	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	void
		1702	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1703	PPCODE:
		1704	sv_unmagic (scalar, MMAP_MAGIC);
		1705	{
		1706	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1707	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1708	if (addr == (void *)-1)
		1709	XSRETURN_NO;
		1710
		1711	sv_force_normal (scalar);
		1712
		1713	/* we store the length in mg_obj, as namlen is I32 :/ */
		1714	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1715	->mg_obj = (SV *)length;
		1716
		1717	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1718
		1719	if (!(prot & PROT_WRITE))
		1720	SvREADONLY_on (scalar);
		1721
		1722	if (SvLEN (scalar))
		1723	Safefree (SvPVX (scalar));
		1724
		1725	SvPVX (scalar) = (char *)addr;
		1726	SvCUR_set (scalar, length);
		1727	SvLEN_set (scalar, 0);
		1728	SvPOK_only (scalar);
		1729
		1730	XSRETURN_YES;
		1731	}
		1732
		1733	void
		1734	munmap (SV *scalar)
		1735	CODE:
		1736	sv_unmagic (scalar, MMAP_MAGIC);
		1737
		1738	int
		1739	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1740	ALIAS:
		1741	mprotect = 1
		1742	CODE:
		1743	{
		1744	STRLEN svlen;
		1745	void *addr = SvPVbyte (scalar, svlen);
		1746	size_t len = SvUV (length);
		1747
		1748	if (offset < 0)
		1749	offset += svlen;
		1750
		1751	if (offset < 0 || offset > svlen)
		1752	croak ("offset outside of scalar");
		1753
		1754	if (!SvOK (length) || len + offset > svlen)
		1755	len = svlen - offset;
		1756
		1757	addr = (void *)(((intptr_t)addr) + offset);
		1758	eio_page_align (&addr, &len);
		1759
		1760	switch (ix)
		1761	{
		1762	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1763	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1764	}
		1765	}
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769	int
		1770	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1771	CODE:
		1772	{
		1773	STRLEN svlen;
		1774	void *addr = SvPVbyte (scalar, svlen);
		1775	size_t len = SvUV (length);
		1776
		1777	if (offset < 0)
		1778	offset += svlen;
		1779
		1780	if (offset < 0 || offset > svlen)
		1781	croak ("offset outside of scalar");
		1782
		1783	if (!SvOK (length) || len + offset > svlen)
		1784	len = svlen - offset;
		1785
		1786	addr = (void *)(((intptr_t)addr) + offset);
		1787	eio_page_align (&addr, &len);
		1788	#if _POSIX_MEMLOCK_RANGE
		1789	RETVAL = munlock (addr, len);
		1790	#else
		1791	RETVAL = EIO_ENOSYS ();
		1792	#endif
		1793	}
		1794	OUTPUT:
		1795	RETVAL
		1796
		1797	int
		1798	munlockall ()
		1799	CODE:
		1800	#if _POSIX_MEMLOCK
		1801	munlockall ();
		1802	#else
		1803	RETVAL = EIO_ENOSYS ();
		1804	#endif
		1805	OUTPUT:
		1806	RETVAL
		1807
		1808	int
		1809	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1810	CODE:
		1811	{
		1812	#if HAVE_LINUX_SPLICE
		1813	loff_t off_in_, off_out_;
		1814	RETVAL = splice (
		1815	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1816	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1817	length, flags
		1818	);
		1819	#else
		1820	RETVAL = EIO_ENOSYS ();
		1821	#endif
		1822	}
		1823	OUTPUT:
		1824	RETVAL
		1825
		1826	int
		1827	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1828	CODE:
		1829	#if HAVE_LINUX_SPLICE
		1830	RETVAL = tee (rfh, wfh, length, flags);
		1831	#else
		1832	RETVAL = EIO_ENOSYS ();
		1833	#endif
		1834	OUTPUT:
		1835	RETVAL
		1836
		1837	void _on_next_submit (SV *cb)
		1838	CODE:
		1839	SvREFCNT_dec (on_next_submit);
		1840	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1841
		1842	PROTOTYPES: DISABLE
		1843
		1844	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1845
		1846	BOOT:
		1847	{
		1848	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1849	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1850	}
		1851
		1852	void
		1853	DESTROY (SV *self)
		1854	CODE:
		1855	{
		1856	aio_wd wd = SvAIO_WD (self);
		1857	#if HAVE_AT
		1858	{
		1859	SV *callback = &PL_sv_undef;
		1860	dREQ; /* clobbers next_pri :/ */
		1861	next_pri = req->pri; /* restore next_pri */
		1862	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1863	req->type = EIO_WD_CLOSE;
		1864	req->wd = wd;
		1865	REQ_SEND;
		1866	}
		1867	#else
		1868	eio_wd_close_sync (wd);
		1869	#endif
		1870	}
		1871
		1872	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1873
		1874	void
		1875	cancel (aio_req_ornot req)
		1876	CODE:
		1877	eio_cancel (req);
		1878
		1879	void
		1880	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1881	PPCODE:
		1882	{
		1883	if (GIMME_V != G_VOID)
		1884	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1885
		1886	if (items > 1)
		1887	{
		1888	SV *cb_cv =get_cb (callback);
		1889
		1890	SvREFCNT_dec (req->callback);
		1891	req->callback = SvREFCNT_inc (cb_cv);
		1892	}
		1893	}
		1894
		1895	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1896
		1897	void
		1898	add (aio_req grp, ...)
		1899	PPCODE:
		1900	{
		1901	int i;
		1902
		1903	if (grp->int1 == 2)
		1904	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1905
		1906	for (i = 1; i < items; ++i )
		1907	{
		1908	aio_req req;
		1909
		1910	if (GIMME_V != G_VOID)
		1911	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1912
		1913	req = SvAIO_REQ (ST (i));
		1914
		1915	if (req)
		1916	eio_grp_add (grp, req);
		1917	}
		1918	}
		1919
		1920	void
		1921	cancel_subs (aio_req_ornot req)
		1922	CODE:
		1923	req_cancel_subs (req);
		1924
		1925	void
		1926	result (aio_req grp, ...)
		1927	CODE:
		1928	{
		1929	int i;
		1930	AV *av;
		1931
		1932	grp->errorno = errno;
		1933
		1934	av = newAV ();
		1935	av_extend (av, items - 1);
		1936
		1937	for (i = 1; i < items; ++i )
		1938	av_push (av, newSVsv (ST (i)));
		1939
		1940	SvREFCNT_dec (grp->sv1);
		1941	grp->sv1 = (SV *)av;
		1942	}
		1943
		1944	void
		1945	errno (aio_req grp, int errorno = errno)
		1946	CODE:
		1947	grp->errorno = errorno;
		1948
		1949	void
		1950	limit (aio_req grp, int limit)
		1951	CODE:
		1952	eio_grp_limit (grp, limit);
		1953
		1954	void
		1955	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1956	CODE:
		1957	{
		1958	SvREFCNT_dec (grp->sv2);
		1959	grp->sv2 = newSVsv (callback);
		1960	grp->feed = aio_grp_feed;
		1961
		1962	if (grp->int2 <= 0)
		1963	grp->int2 = 2;
		1964
		1965	eio_grp_limit (grp, grp->int2);
		1966	}
		1967

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