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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.28 by root, Wed Aug 17 05:06:59 2005 UTC vs.
Revision 1.244 by root, Tue May 30 22:45:52 2017 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12
13	#include <unistd.h>	16	#include <limits.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	18	#include <sched.h>
17		19
18	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
19		23
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* the incompetent fool that created musl keeps __linux__, refuses
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	* to implement any linux standard apis, and also has no way to test
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	* for his broken iplementation. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
23		37
24	#if __ia64	38	/* perl namespace pollution */
25	# define STACKSIZE 65536	39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
26	#else	84	#else
27	# define STACKSIZE 4096	85
		86	#include <sys/time.h>
		87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	SV *sv3, *sv4; \
		119	STRLEN stroffset; \
		120	SV *self;
		121
		122	#define EIO_NO_WRAPPERS 1
		123
		124	#include "libeio/config.h"
		125	#include "libeio/eio.h"
		126
		127	static int req_invoke (eio_req *req);
		128	#define EIO_FINISH(req) req_invoke (req)
		129	static void req_destroy (eio_req *grp);
		130	#define EIO_DESTROY(req) req_destroy (req)
		131
		132	#include "libeio/eio.c"
		133
		134	#if !HAVE_POSIX_FADVISE
		135	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		136	#endif
		137
		138	#if !HAVE_POSIX_MADVISE
		139	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		140	#endif
		141
		142	#ifndef MAP_ANONYMOUS
		143	# ifdef MAP_ANON
		144	# define MAP_ANONYMOUS MAP_ANON
		145	# else
		146	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	147	# endif
		148	#endif
29		149
30	enum {	150	/* defines all sorts of constants to 0 unless they are already defined */
31	REQ_QUIT,	151	/* also provides const_iv_ and const_niv_ macros for them */
32	REQ_OPEN, REQ_CLOSE,	152	#include "def0.h"
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};
39		153
40	typedef struct aio_cb {	154	#ifndef makedev
41	struct aio_cb *volatile next;	155	# define makedev(maj,min) (((maj) << 8) | (min))
		156	#endif
		157	#ifndef major
		158	# define major(dev) ((dev) >> 8)
		159	#endif
		160	#ifndef minor
		161	# define minor(dev) ((dev) & 0xff)
		162	#endif
42		163
43	int type;	164	#if PAGESIZE <= 0
		165	# define PAGESIZE sysconf (_SC_PAGESIZE)
		166	#endif
44		167
45	int fd;	168	/*****************************************************************************/
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;
59
60	static int started;
61	static volatile int nreqs;
62	static int max_outstanding = 1<<30;
63	static int respipe [2];
64
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68
69	static volatile aio_req reqs, reqe; /* queue start, queue end */
70	static volatile aio_req ress, rese; /* queue start, queue end */
71
72	static void free_req (aio_req req)
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76
77	if (req->fh)
78	SvREFCNT_dec (req->fh);
79
80	if (req->statdata)
81	Safefree (req->statdata);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}
88		169
89	static void	170	static void
90	poll_wait ()	171	fiemap (eio_req *req)
91	{	172	{
92	if (nreqs && !ress)	173	req->result = -1;
93	{
94	fd_set rfd;
95	FD_ZERO(&rfd);
96	FD_SET(respipe [0], &rfd);
97		174
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	175	#if HAVE_FIEMAP
99	}	176	/* assume some c99 */
100	}	177	struct fiemap *fiemap = 0;
		178	size_t end_offset;
		179	int count = req->int3;
101		180
102	static int	181	req->flags |= EIO_FLAG_PTR1_FREE;
103	poll_cb ()	182
104	{	183	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
105	dSP;	184	/* increase in 3.5kb steps */
		185	if (count < 0)
106	int count = 0;	186	count = 8;
107	int do_croak = 0;	187
108	aio_req req;	188	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		189	errno = ENOMEM;
		190	if (!fiemap)
		191	return;
		192
		193	req->ptr1 = fiemap;
		194
		195	fiemap->fm_start = req->offs;
		196	fiemap->fm_length = req->size;
		197	fiemap->fm_flags = req->int2;
		198	fiemap->fm_extent_count = count;
		199
		200	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		201	return;
		202
		203	if (req->int3 >= 0 /* not autosizing */
		204	|| !fiemap->fm_mapped_extents /* no more extents */
		205	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		206	goto done;
		207
		208	/* else we have to loop -
		209	* it would be tempting (actually I tried that first) to just query the
		210	* number of extents needed, but linux often feels like not returning all
		211	* extents, without telling us it left any out. this complicates
		212	* this quite a bit.
		213	*/
		214
		215	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
109		216
110	for (;;)	217	for (;;)
111	{	218	{
112	pthread_mutex_lock (&reslock);	219	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
113	req = ress;	220	char scratch[3072];
		221	struct fiemap *incmap = (struct fiemap *)scratch;
114		222
		223	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		224	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		225	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		226	incmap->fm_flags = fiemap->fm_flags;
		227	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		228
		229	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		230	return;
		231
		232	if (!incmap->fm_mapped_extents)
		233	goto done;
		234
		235	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		236	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		237	errno = ENOMEM;
115	if (req)	238	if (!fiemap)
		239	return;
		240
		241	req->ptr1 = fiemap;
		242
		243	for (count = 0; count < incmap->fm_mapped_extents; ++count)
116	{	244	{
117	ress = req->next;	245	struct fiemap_extent *e = incmap->fm_extents + count;
118		246
119	if (!ress)	247	if (e->fe_logical + e->fe_length >= end_offset)
120	{	248	goto done;
121	rese = 0;
122		249
123	/* read any signals sent by the worker threads */	250	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
124	char buf [32];	251
125	while (read (respipe [0], buf, 32) == 32)	252	if (e->fe_flags & FIEMAP_EXTENT_LAST)
126	;	253	goto done;
127	}	254
128	}	255	}
		256	}
129		257
130	pthread_mutex_unlock (&reslock);	258	done:
		259	req->result = 0;
131		260
132	if (!req)	261	#else
133	break;	262	errno = ENOSYS;
		263	#endif
		264	}
134		265
135	nreqs--;	266	/*****************************************************************************/
136		267
137	if (req->type == REQ_QUIT)	268	enum {
138	started--;	269	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
139	else	270	};
		271
		272	typedef eio_req *aio_req;
		273	typedef eio_req *aio_req_ornot;
		274	typedef eio_wd aio_wd;
		275
		276	static SV *on_next_submit;
		277	static int next_pri = EIO_PRI_DEFAULT;
		278	static int max_outstanding;
		279
		280	static s_epipe respipe;
		281
		282	static void req_destroy (aio_req req);
		283	static void req_cancel (aio_req req);
		284
		285	static void
		286	want_poll (void)
		287	{
		288	/* write a dummy byte to the pipe so fh becomes ready */
		289	s_epipe_signal (&respipe);
		290	}
		291
		292	static void
		293	done_poll (void)
		294	{
		295	/* read any signals sent by the worker threads */
		296	s_epipe_drain (&respipe);
		297	}
		298
		299	/* must be called at most once */
		300	static SV *
		301	req_sv (aio_req req, HV *stash)
		302	{
		303	if (!req->self)
		304	{
		305	req->self = (SV *)newHV ();
		306	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		307	}
		308
		309	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		310	}
		311
		312	static SV *
		313	newSVaio_wd (aio_wd wd)
		314	{
		315	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		316	}
		317
		318	static aio_req
		319	SvAIO_REQ (SV *sv)
		320	{
		321	MAGIC *mg;
		322
		323	if (!SvROK (sv)
		324	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		325	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		326	&& SvSTASH (SvRV (sv)) != aio_req_stash
		327	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		328	croak ("object of class IO::AIO::REQ expected");
		329
		330	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		331
		332	return mg ? (aio_req)mg->mg_ptr : 0;
		333	}
		334
		335	static aio_wd
		336	SvAIO_WD (SV *sv)
		337	{
		338	if (!SvROK (sv)
		339	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		340	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		341	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		342
		343	return (aio_wd)(long)SvIVX (SvRV (sv));
		344	}
		345
		346	static SV *
		347	newmortalFH (int fd, int flags)
		348	{
		349	if (fd < 0)
		350	return &PL_sv_undef;
		351
		352	GV *gv = (GV *)sv_newmortal ();
		353	char sym[64];
		354	int symlen;
		355
		356	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		357	gv_init (gv, aio_stash, sym, symlen, 0);
		358
		359	symlen = snprintf (
		360	sym,
		361	sizeof (sym),
		362	"%s&=%d",
		363	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		364	fd
		365	);
		366
		367	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		368	? (SV *)gv : &PL_sv_undef;
		369	}
		370
		371	static void
		372	aio_grp_feed (aio_req grp)
		373	{
		374	if (grp->sv2 && SvOK (grp->sv2))
		375	{
		376	dSP;
		377
		378	ENTER;
		379	SAVETMPS;
		380	PUSHMARK (SP);
		381	XPUSHs (req_sv (grp, aio_grp_stash));
		382	PUTBACK;
		383	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		384	SPAGAIN;
		385	FREETMPS;
		386	LEAVE;
		387	}
		388	}
		389
		390	static void
		391	req_submit (eio_req *req)
		392	{
		393	eio_submit (req);
		394
		395	if (expect_false (on_next_submit))
		396	{
		397	dSP;
		398	SV *cb = sv_2mortal (on_next_submit);
		399
		400	on_next_submit = 0;
		401
		402	PUSHMARK (SP);
		403	PUTBACK;
		404	call_sv (cb, G_DISCARD | G_EVAL);
		405	}
		406	}
		407
		408	static int
		409	req_invoke (eio_req *req)
		410	{
		411	if (req->flags & FLAG_SV2_RO_OFF)
		412	SvREADONLY_off (req->sv2);
		413
		414	if (!EIO_CANCELLED (req) && req->callback)
		415	{
		416	dSP;
		417	static SV *sv_result_cache; /* caches the result integer SV */
		418	SV *sv_result;
		419
		420	ENTER;
		421	SAVETMPS;
		422	PUSHMARK (SP);
		423	EXTEND (SP, 1);
		424
		425	/* do not recreate the result IV from scratch each time */
		426	if (expect_true (sv_result_cache))
140	{	427	{
141	int errorno = errno;	428	sv_result = sv_result_cache; sv_result_cache = 0;
142	errno = req->errorno;	429	SvIV_set (sv_result, req->result);
143		430	SvIOK_only (sv_result);
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);
149
150	if (req->statdata)
151	{
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);
155	}
156
157	ENTER;
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID | G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);
186	}
187	}
188
189	LEAVE;
190
191	errno = errorno;
192	count++;
193	}
194
195	free_req (req);
196	}
197
198	return count;
199	}
200
201	static void *aio_proc(void *arg);
202
203	static void
204	start_thread (void)
205	{
206	sigset_t fullsigset, oldsigset;
207	pthread_t tid;
208	pthread_attr_t attr;
209
210	pthread_attr_init (&attr);
211	pthread_attr_setstacksize (&attr, STACKSIZE);
212	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
213
214	sigfillset (&fullsigset);
215	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
216
217	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
218	started++;
219
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);
221	}
222
223	static void
224	send_req (aio_req req)
225	{
226	nreqs++;
227
228	pthread_mutex_lock (&reqlock);
229
230	req->next = 0;
231
232	if (reqe)
233	{
234	reqe->next = req;
235	reqe = req;
236	}
237	else
238	reqe = reqs = req;
239
240	pthread_cond_signal (&reqwait);
241	pthread_mutex_unlock (&reqlock);
242
243	if (nreqs > max_outstanding)
244	for (;;)
245	{
246	poll_cb ();
247
248	if (nreqs <= max_outstanding)
249	break;
250
251	poll_wait ();
252	}
253	}
254
255	static void
256	end_thread (void)
257	{
258	aio_req req;
259	Newz (0, req, 1, aio_cb);
260	req->type = REQ_QUIT;
261
262	send_req (req);
263	}
264
265	static void min_parallel (int nthreads)
266	{
267	while (nthreads > started)
268	start_thread ();
269	}
270
271	static void max_parallel (int nthreads)
272	{
273	int cur = started;
274
275	while (cur > nthreads)
276	{
277	end_thread ();
278	cur--;
279	}
280
281	while (started > nthreads)
282	{
283	poll_wait ();
284	poll_cb ();
285	}
286	}
287
288	static void create_pipe ()
289	{
290	if (pipe (respipe))
291	croak ("unable to initialize result pipe");
292
293	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295
296	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
297	croak ("cannot set result pipe to nonblocking mode");
298	}
299
300	static void atfork_prepare (void)
301	{
302	pthread_mutex_lock (&reqlock);
303	pthread_mutex_lock (&reslock);
304	}
305
306	static void atfork_parent (void)
307	{
308	pthread_mutex_unlock (&reslock);
309	pthread_mutex_unlock (&reqlock);
310	}
311
312	static void atfork_child (void)
313	{
314	aio_req prv;
315
316	int restart = started;
317	started = 0;
318
319	while (reqs)
320	{
321	prv = reqs;
322	reqs = prv->next;
323	free_req (prv);
324	}
325
326	reqs = reqe = 0;
327
328	while (ress)
329	{
330	prv = ress;
331	ress = prv->next;
332	free_req (prv);
333	}
334
335	ress = rese = 0;
336
337	atfork_parent ();
338
339	min_parallel (restart);
340	}
341
342	/*****************************************************************************/
343	/* work around various missing functions */
344
345	#if !HAVE_PREADWRITE
346	# define pread aio_pread
347	# define pwrite aio_pwrite
348
349	/*
350	* make our pread/pwrite safe against themselves, but not against
351	* normal read/write by using a mutex. slows down execution a lot,
352	* but that's your problem, not mine.
353	*/
354	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
355
356	static ssize_t
357	pread (int fd, void *buf, size_t count, off_t offset)
358	{
359	ssize_t res;
360	off_t ooffset;
361
362	pthread_mutex_lock (&iolock);
363	ooffset = lseek (fd, 0, SEEK_CUR);
364	lseek (fd, offset, SEEK_SET);
365	res = read (fd, buf, count);
366	lseek (fd, ooffset, SEEK_SET);
367	pthread_mutex_unlock (&iolock);
368
369	return res;
370	}
371
372	static ssize_t
373	pwrite (int fd, void *buf, size_t count, off_t offset)
374	{
375	ssize_t res;
376	off_t ooffset;
377
378	pthread_mutex_lock (&iolock);
379	ooffset = lseek (fd, 0, SEEK_CUR);
380	lseek (fd, offset, SEEK_SET);
381	res = write (fd, buf, count);
382	lseek (fd, offset, SEEK_SET);
383	pthread_mutex_unlock (&iolock);
384
385	return res;
386	}
387	#endif
388
389	#if !HAVE_FDATASYNC
390	# define fdatasync fsync
391	#endif
392
393	#if !HAVE_READAHEAD
394	# define readahead aio_readahead
395
396	static char readahead_buf[4096];
397
398	static ssize_t
399	readahead (int fd, off_t offset, size_t count)
400	{
401	while (count > 0)
402	{
403	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
404
405	pread (fd, readahead_buf, len, offset);
406	offset += len;
407	count -= len;
408	}
409
410	errno = 0;
411	}
412	#endif
413
414	/*****************************************************************************/
415
416	static void *
417	aio_proc (void *thr_arg)
418	{
419	aio_req req;
420	int type;
421
422	do
423	{
424	pthread_mutex_lock (&reqlock);
425
426	for (;;)
427	{
428	req = reqs;
429
430	if (reqs)
431	{
432	reqs = reqs->next;
433	if (!reqs) reqe = 0;
434	}
435
436	if (req)
437	break;
438
439	pthread_cond_wait (&reqwait, &reqlock);
440	}
441
442	pthread_mutex_unlock (&reqlock);
443
444	errno = 0; /* strictly unnecessary */
445
446	type = req->type;
447
448	switch (type)
449	{
450	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
451	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
452
453	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
454
455	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
456	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
457	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
458
459	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
460	case REQ_CLOSE: req->result = close (req->fd); break;
461	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
462	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
463	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
464
465	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
466	case REQ_FSYNC: req->result = fsync (req->fd); break;
467
468	case REQ_QUIT:
469	break;
470
471	default:
472	req->result = ENOSYS;
473	break;
474	}
475
476	req->errorno = errno;
477
478	pthread_mutex_lock (&reslock);
479
480	req->next = 0;
481
482	if (rese)
483	{
484	rese->next = req;
485	rese = req;
486	}	431	}
487	else	432	else
488	{	433	{
489	rese = ress = req;	434	sv_result = newSViv (req->result);
490		435	SvREADONLY_on (sv_result);
491	/* write a dummy byte to the pipe so fh becomes ready */
492	write (respipe [1], &respipe, 1);
493	}	436	}
494		437
495	pthread_mutex_unlock (&reslock);	438	switch (req->type)
		439	{
		440	case EIO_WD_OPEN:
		441	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		442	break;
		443
		444	case EIO_READDIR:
		445	{
		446	SV *rv = &PL_sv_undef;
		447
		448	if (req->result >= 0)
		449	{
		450	int i;
		451	char *names = (char *)req->ptr2;
		452	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		453	AV *av = newAV ();
		454
		455	av_extend (av, req->result - 1);
		456
		457	for (i = 0; i < req->result; ++i)
		458	{
		459	if (req->int1 & EIO_READDIR_DENTS)
		460	{
		461	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		462
		463	if (req->int1 & EIO_READDIR_CUSTOM2)
		464	{
		465	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		466	AV *avent = newAV ();
		467
		468	av_extend (avent, 2);
		469
		470	if (!sv_type [ent->type])
		471	{
		472	sv_type [ent->type] = newSViv (ent->type);
		473	SvREADONLY_on (sv_type [ent->type]);
		474	}
		475
		476	av_store (avent, 0, namesv);
		477	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		478	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		479
		480	av_store (av, i, newRV_noinc ((SV *)avent));
		481	}
		482	else
		483	av_store (av, i, namesv);
		484
		485	++ent;
		486	}
		487	else
		488	{
		489	SV *name = newSVpv (names, 0);
		490	av_store (av, i, name);
		491	names += SvCUR (name) + 1;
		492	}
		493	}
		494
		495	rv = sv_2mortal (newRV_noinc ((SV *)av));
		496	}
		497
		498	PUSHs (rv);
		499
		500	if (req->int1 & EIO_READDIR_CUSTOM1)
		501	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		502	}
		503	break;
		504
		505	case EIO_OPEN:
		506	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		507	break;
		508
		509	case EIO_STATVFS:
		510	case EIO_FSTATVFS:
		511	{
		512	SV *rv = &PL_sv_undef;
		513
		514	#ifndef _WIN32
		515	if (req->result >= 0)
		516	{
		517	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		518	HV *hv = newHV ();
		519	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		520	* chooses to make it a struct.
		521	*/
		522	unsigned long fsid = 0;
		523	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		524
		525	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		526
		527	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		528	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		529	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		530	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		531	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		532	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		533	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		534	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		535	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		536	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		537	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		538	}
		539	#endif
		540
		541	PUSHs (rv);
		542	}
		543
		544	break;
		545
		546	case EIO_GROUP:
		547	req->int1 = 2; /* mark group as finished */
		548
		549	if (req->sv1)
		550	{
		551	int i;
		552	AV *av = (AV *)req->sv1;
		553
		554	EXTEND (SP, AvFILL (av) + 1);
		555	for (i = 0; i <= AvFILL (av); ++i)
		556	PUSHs (*av_fetch (av, i, 0));
		557	}
		558	break;
		559
		560	case EIO_NOP:
		561	case EIO_BUSY:
		562	break;
		563
		564	case EIO_READLINK:
		565	case EIO_REALPATH:
		566	if (req->result > 0)
		567	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		568	break;
		569
		570	case EIO_STAT:
		571	case EIO_LSTAT:
		572	case EIO_FSTAT:
		573	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		574
		575	if (!(PL_laststatval = req->result))
		576	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		577	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		578
		579	PUSHs (sv_result);
		580	break;
		581
		582	case EIO_SEEK:
		583	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		584	break;
		585
		586	case EIO_READ:
		587	{
		588	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		589	*SvEND (req->sv2) = 0;
		590	SvPOK_only (req->sv2);
		591	SvSETMAGIC (req->sv2);
		592	PUSHs (sv_result);
		593	}
		594	break;
		595
		596	case EIO_CUSTOM:
		597	if (req->feed == fiemap)
		598	{
		599	#if HAVE_FIEMAP
		600	if (!req->result)
		601	{
		602	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		603
		604	if (fiemap->fm_extent_count)
		605	{
		606	AV *av = newAV ();
		607	int i;
		608
		609	while (fiemap->fm_mapped_extents)
		610	{
		611	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		612	AV *ext_av = newAV ();
		613
		614	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		615	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		616	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		617	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		618
		619	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		620	}
		621
		622	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		623	}
		624	else
		625	{
		626	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		627	PUSHs (sv_result);
		628	}
		629	}
		630	#endif
		631	}
		632	else
		633	PUSHs (sv_result);
		634	break;
		635
		636	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		637	if (req->result > 0)
		638	SvIV_set (sv_result, 0);
		639	/* FALLTHROUGH */
		640
		641	default:
		642	PUSHs (sv_result);
		643	break;
		644	}
		645
		646	errno = req->errorno;
		647
		648	PUTBACK;
		649	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		650	SPAGAIN;
		651
		652	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		653	SvREFCNT_dec (sv_result);
		654	else
		655	sv_result_cache = sv_result;
		656
		657	FREETMPS;
		658	LEAVE;
		659
		660	PUTBACK;
496	}	661	}
497	while (type != REQ_QUIT);	662
		663	return !!SvTRUE (ERRSV);
		664	}
		665
		666	static void
		667	req_destroy (aio_req req)
		668	{
		669	if (req->self)
		670	{
		671	sv_unmagic (req->self, PERL_MAGIC_ext);
		672	SvREFCNT_dec (req->self);
		673	}
		674
		675	SvREFCNT_dec (req->sv1);
		676	SvREFCNT_dec (req->sv2);
		677	SvREFCNT_dec (req->sv3);
		678	SvREFCNT_dec (req->sv4);
		679	SvREFCNT_dec (req->callback);
		680
		681	free (req);
		682	}
		683
		684	static void
		685	req_cancel_subs (aio_req grp)
		686	{
		687	if (grp->type != EIO_GROUP)
		688	return;
		689
		690	SvREFCNT_dec (grp->sv2);
		691	grp->sv2 = 0;
		692
		693	eio_grp_cancel (grp);
		694	}
		695
		696	static void ecb_cold
		697	create_respipe (void)
		698	{
		699	if (s_epipe_renew (&respipe))
		700	croak ("IO::AIO: unable to initialize result pipe");
		701	}
		702
		703	static void
		704	poll_wait (void)
		705	{
		706	while (eio_nreqs ())
		707	{
		708	int size;
		709
		710	X_LOCK (EIO_POOL->reslock);
		711	size = EIO_POOL->res_queue.size;
		712	X_UNLOCK (EIO_POOL->reslock);
		713
		714	if (size)
		715	return;
		716
		717	etp_maybe_start_thread (EIO_POOL);
		718
		719	s_epipe_wait (&respipe);
		720	}
		721	}
		722
		723	static int
		724	poll_cb (void)
		725	{
		726	for (;;)
		727	{
		728	int res = eio_poll ();
		729
		730	if (res > 0)
		731	croak (0);
		732
		733	if (!max_outstanding || max_outstanding > eio_nreqs ())
		734	return res;
		735
		736	poll_wait ();
		737	}
		738	}
		739
		740	static void ecb_cold
		741	reinit (void)
		742	{
		743	create_respipe ();
		744
		745	if (eio_init (want_poll, done_poll) < 0)
		746	croak ("IO::AIO: unable to initialise eio library");
		747	}
		748
		749	/*****************************************************************************/
		750
		751	#if !_POSIX_MAPPED_FILES
		752	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		753	# define munmap(addr,length) EIO_ENOSYS ()
		754	#endif
		755
		756	#if !_POSIX_MEMORY_PROTECTION
		757	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		758	#endif
		759
		760	#define MMAP_MAGIC PERL_MAGIC_ext
		761
		762	static int ecb_cold
		763	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		764	{
		765	int old_errno = errno;
		766	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		767	errno = old_errno;
		768
		769	mg->mg_obj = 0; /* just in case */
		770
		771	SvREADONLY_off (sv);
		772
		773	if (SvPVX (sv) != mg->mg_ptr)
		774	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		775
		776	SvCUR_set (sv, 0);
		777	SvPVX (sv) = 0;
		778	SvOK_off (sv);
498		779
499	return 0;	780	return 0;
500	}	781	}
501		782
		783	static MGVTBL mmap_vtbl = {
		784	0, 0, 0, 0, mmap_free
		785	};
		786
		787	/*****************************************************************************/
		788
		789	static SV *
		790	get_cb (SV *cb_sv)
		791	{
		792	SvGETMAGIC (cb_sv);
		793	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		794	}
		795
		796	static aio_req ecb_noinline
		797	dreq (SV *callback)
		798	{
		799	SV *cb_cv;
		800	aio_req req;
		801	int req_pri = next_pri;
		802	next_pri = EIO_PRI_DEFAULT;
		803
		804	cb_cv = get_cb (callback);
		805
		806	req = calloc (sizeof (*req), 1);
		807	if (!req)
		808	croak ("out of memory during eio_req allocation");
		809
		810	req->callback = SvREFCNT_inc (cb_cv);
		811	req->pri = req_pri;
		812
		813	return req;
		814	}
		815
502	#define dREQ \	816	#define dREQ \
503	aio_req req; \	817	aio_req req = dreq (callback); \
		818
		819	#define REQ_SEND \
		820	PUTBACK; \
		821	req_submit (req); \
		822	SPAGAIN; \
504	\	823	\
505	if (SvOK (callback) && !SvROK (callback)) \	824	if (GIMME_V != G_VOID) \
506	croak ("clalback must be undef or of reference type"); \	825	XPUSHs (req_sv (req, aio_req_stash));
507	\	826
508	Newz (0, req, 1, aio_cb); \	827	ecb_inline void
509	if (!req) \	828	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
510	croak ("out of memory during aio_req allocation"); \	829	{
511	\	830	if (expect_false (SvROK (path)))
512	req->callback = newSVsv (callback);	831	{
513		832	SV *rv = SvRV (path);
		833	SV *wdob;
		834
		835	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		836	{
		837	path = AvARRAY (rv)[1];
		838	wdob = AvARRAY (rv)[0];
		839
		840	if (SvOK (wdob))
		841	{
		842	*wd = SvAIO_WD (wdob);
		843	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		844	}
		845	else
		846	*wd = EIO_INVALID_WD;
		847	}
		848	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		849	{
		850	*wd = (aio_wd)(long)SvIVX (rv);
		851	*wdsv = SvREFCNT_inc_NN (rv);
		852	*ptr = ".";
		853	return; /* path set to "." */
		854	}
		855	else
		856	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		857	}
		858
		859	*pathsv = newSVsv (path);
		860	*ptr = SvPVbyte_nolen (*pathsv);
		861	}
		862
		863	static void ecb_noinline
		864	req_set_path1 (aio_req req, SV *path)
		865	{
		866	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		867	}
		868
		869	static void ecb_noinline
		870	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		871	{
		872	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		873
		874	switch (SvTYPE (rv))
		875	{
		876	case SVt_PVIO:
		877	case SVt_PVLV:
		878	case SVt_PVGV:
		879	req->type = type_fh;
		880	req->sv1 = newSVsv (fh_or_path);
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	break;
		883
		884	default:
		885	req->type = type_path;
		886	req_set_path1 (req, fh_or_path);
		887	break;
		888	}
		889	}
		890
		891	XS(boot_IO__AIO) ecb_cold;
		892
514	MODULE = IO::AIO PACKAGE = IO::AIO	893	MODULE = IO::AIO PACKAGE = IO::AIO
515		894
516	PROTOTYPES: ENABLE	895	PROTOTYPES: ENABLE
517		896
518	BOOT:	897	BOOT:
519	{	898	{
520	create_pipe ();	899	static const struct {
521	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	900	const char *name;
522	}	901	IV iv;
		902	} *civ, const_iv[] = {
		903	# define const_niv(name, value) { # name, (IV) value },
		904	# define const_iv(name) { # name, (IV) name },
		905	# define const_eio(name) { # name, (IV) EIO_ ## name },
523		906
		907	/* you have to re-run ./gendef0 after adding/removing any constants here */
		908	/* the first block can be undef if missing */
		909	const_iv (ENOSYS)
		910	const_iv (EXDEV)
		911	const_iv (EBADR)
		912
		913	/* for lseek */
		914	const_iv (SEEK_DATA)
		915	const_iv (SEEK_HOLE)
		916
		917	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		918	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		919	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		920	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		921	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		922	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		923
		924	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		925	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		926	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		927	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		928	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		929	const_niv (MADV_FREE , POSIX_MADV_FREE)
		930
		931	/* the second block will be 0 when missing */
		932	const_iv (O_RDONLY)
		933	const_iv (O_WRONLY)
		934	const_iv (O_RDWR)
		935	const_iv (O_CREAT)
		936	const_iv (O_TRUNC)
		937	const_iv (O_EXCL)
		938	const_iv (O_APPEND)
		939
		940	const_iv (O_ASYNC)
		941	const_iv (O_DIRECT)
		942	const_iv (O_NOATIME)
		943
		944	const_iv (O_CLOEXEC)
		945	const_iv (O_NOCTTY)
		946	const_iv (O_NOFOLLOW)
		947	const_iv (O_NONBLOCK)
		948	const_iv (O_EXEC)
		949	const_iv (O_SEARCH)
		950	const_iv (O_DIRECTORY)
		951	const_iv (O_DSYNC)
		952	const_iv (O_RSYNC)
		953	const_iv (O_SYNC)
		954	const_iv (O_PATH)
		955	const_iv (O_TMPFILE)
		956	const_iv (O_TTY_INIT)
		957
		958	const_iv (S_IFIFO)
		959	const_iv (S_IFCHR)
		960	const_iv (S_IFBLK)
		961	const_iv (S_IFLNK)
		962	const_iv (S_IFREG)
		963	const_iv (S_IFDIR)
		964	const_iv (S_IFWHT)
		965	const_iv (S_IFSOCK)
		966	const_iv (S_IFMT)
		967
		968	const_iv (ST_RDONLY)
		969	const_iv (ST_NOSUID)
		970	const_iv (ST_NODEV)
		971	const_iv (ST_NOEXEC)
		972	const_iv (ST_SYNCHRONOUS)
		973	const_iv (ST_MANDLOCK)
		974	const_iv (ST_WRITE)
		975	const_iv (ST_APPEND)
		976	const_iv (ST_IMMUTABLE)
		977	const_iv (ST_NOATIME)
		978	const_iv (ST_NODIRATIME)
		979	const_iv (ST_RELATIME)
		980
		981	const_iv (PROT_NONE)
		982	const_iv (PROT_EXEC)
		983	const_iv (PROT_READ)
		984	const_iv (PROT_WRITE)
		985
		986	const_iv (MAP_PRIVATE)
		987	const_iv (MAP_SHARED)
		988	const_iv (MAP_FIXED)
		989	const_iv (MAP_ANONYMOUS)
		990
		991	/* linuxish */
		992	const_iv (MAP_LOCKED)
		993	const_iv (MAP_NORESERVE)
		994	const_iv (MAP_POPULATE)
		995	const_iv (MAP_NONBLOCK)
		996	const_iv (MAP_GROWSDOWN)
		997	const_iv (MAP_32BIT)
		998	const_iv (MAP_HUGETLB)
		999	const_iv (MAP_STACK)
		1000
		1001	const_iv (FIFREEZE)
		1002	const_iv (FITHAW)
		1003	const_iv (FITRIM)
		1004	const_iv (FICLONE)
		1005	const_iv (FICLONERANGE)
		1006	const_iv (FIDEDUPERANGE)
		1007
		1008	const_iv (FS_IOC_GETFLAGS)
		1009	const_iv (FS_IOC_SETFLAGS)
		1010	const_iv (FS_IOC_GETVERSION)
		1011	const_iv (FS_IOC_SETVERSION)
		1012	const_iv (FS_IOC_FIEMAP)
		1013	const_iv (FS_IOC_FSGETXATTR)
		1014	const_iv (FS_IOC_FSSETXATTR)
		1015	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1016	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1017	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1018
		1019	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1020
		1021	const_iv (FS_SECRM_FL)
		1022	const_iv (FS_UNRM_FL)
		1023	const_iv (FS_COMPR_FL)
		1024	const_iv (FS_SYNC_FL)
		1025	const_iv (FS_IMMUTABLE_FL)
		1026	const_iv (FS_APPEND_FL)
		1027	const_iv (FS_NODUMP_FL)
		1028	const_iv (FS_NOATIME_FL)
		1029	const_iv (FS_DIRTY_FL)
		1030	const_iv (FS_COMPRBLK_FL)
		1031	const_iv (FS_NOCOMP_FL)
		1032	const_iv (FS_ENCRYPT_FL)
		1033	const_iv (FS_BTREE_FL)
		1034	const_iv (FS_INDEX_FL)
		1035	const_iv (FS_JOURNAL_DATA_FL)
		1036	const_iv (FS_NOTAIL_FL)
		1037	const_iv (FS_DIRSYNC_FL)
		1038	const_iv (FS_TOPDIR_FL)
		1039	const_iv (FS_FL_USER_MODIFIABLE)
		1040
		1041	const_iv (FS_XFLAG_REALTIME)
		1042	const_iv (FS_XFLAG_PREALLOC)
		1043	const_iv (FS_XFLAG_IMMUTABLE)
		1044	const_iv (FS_XFLAG_APPEND)
		1045	const_iv (FS_XFLAG_SYNC)
		1046	const_iv (FS_XFLAG_NOATIME)
		1047	const_iv (FS_XFLAG_NODUMP)
		1048	const_iv (FS_XFLAG_RTINHERIT)
		1049	const_iv (FS_XFLAG_PROJINHERIT)
		1050	const_iv (FS_XFLAG_NOSYMLINKS)
		1051	const_iv (FS_XFLAG_EXTSIZE)
		1052	const_iv (FS_XFLAG_EXTSZINHERIT)
		1053	const_iv (FS_XFLAG_NODEFRAG)
		1054	const_iv (FS_XFLAG_FILESTREAM)
		1055	const_iv (FS_XFLAG_DAX)
		1056	const_iv (FS_XFLAG_HASATTR)
		1057
		1058	const_iv (FIEMAP_FLAG_SYNC)
		1059	const_iv (FIEMAP_FLAG_XATTR)
		1060	const_iv (FIEMAP_FLAGS_COMPAT)
		1061	const_iv (FIEMAP_EXTENT_LAST)
		1062	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1063	const_iv (FIEMAP_EXTENT_DELALLOC)
		1064	const_iv (FIEMAP_EXTENT_ENCODED)
		1065	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1066	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1067	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1068	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1069	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1070	const_iv (FIEMAP_EXTENT_MERGED)
		1071	const_iv (FIEMAP_EXTENT_SHARED)
		1072
		1073	const_iv (SPLICE_F_MOVE)
		1074	const_iv (SPLICE_F_NONBLOCK)
		1075	const_iv (SPLICE_F_MORE)
		1076	const_iv (SPLICE_F_GIFT)
		1077
		1078	/* these are libeio constants, and are independent of gendef0 */
		1079	const_eio (SEEK_SET)
		1080	const_eio (SEEK_CUR)
		1081	const_eio (SEEK_END)
		1082
		1083	const_eio (MCL_FUTURE)
		1084	const_eio (MCL_CURRENT)
		1085
		1086	const_eio (MS_ASYNC)
		1087	const_eio (MS_INVALIDATE)
		1088	const_eio (MS_SYNC)
		1089
		1090	const_eio (MT_MODIFY)
		1091
		1092	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1093	const_eio (SYNC_FILE_RANGE_WRITE)
		1094	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1095
		1096	const_eio (FALLOC_FL_KEEP_SIZE)
		1097	const_eio (FALLOC_FL_PUNCH_HOLE)
		1098	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1099	const_eio (FALLOC_FL_ZERO_RANGE)
		1100
		1101	const_eio (READDIR_DENTS)
		1102	const_eio (READDIR_DIRS_FIRST)
		1103	const_eio (READDIR_STAT_ORDER)
		1104	const_eio (READDIR_FOUND_UNKNOWN)
		1105
		1106	const_eio (DT_UNKNOWN)
		1107	const_eio (DT_FIFO)
		1108	const_eio (DT_CHR)
		1109	const_eio (DT_DIR)
		1110	const_eio (DT_BLK)
		1111	const_eio (DT_REG)
		1112	const_eio (DT_LNK)
		1113	const_eio (DT_SOCK)
		1114	const_eio (DT_WHT)
		1115	};
		1116
		1117	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1118	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1119	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1120	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1121
		1122	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1123	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1124
		1125	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1126
		1127	reinit ();
		1128	}
		1129
524	void	1130	void
525	min_parallel(nthreads)	1131	reinit ()
526	int nthreads	1132	PROTOTYPE:
		1133
		1134	void
		1135	max_poll_reqs (unsigned int nreqs)
527	PROTOTYPE: $	1136	PROTOTYPE: $
		1137	CODE:
		1138	eio_set_max_poll_reqs (nreqs);
528		1139
529	void	1140	void
530	max_parallel(nthreads)	1141	max_poll_time (double nseconds)
531	int nthreads
532	PROTOTYPE: $	1142	PROTOTYPE: $
533
534	int
535	max_outstanding(nreqs)
536	int nreqs
537	PROTOTYPE: $
538	CODE:	1143	CODE:
539	RETVAL = max_outstanding;	1144	eio_set_max_poll_time (nseconds);
		1145
		1146	void
		1147	min_parallel (unsigned int nthreads)
		1148	PROTOTYPE: $
		1149	CODE:
		1150	eio_set_min_parallel (nthreads);
		1151
		1152	void
		1153	max_parallel (unsigned int nthreads)
		1154	PROTOTYPE: $
		1155	CODE:
		1156	eio_set_max_parallel (nthreads);
		1157
		1158	void
		1159	max_idle (unsigned int nthreads)
		1160	PROTOTYPE: $
		1161	CODE:
		1162	eio_set_max_idle (nthreads);
		1163
		1164	void
		1165	idle_timeout (unsigned int seconds)
		1166	PROTOTYPE: $
		1167	CODE:
		1168	eio_set_idle_timeout (seconds);
		1169
		1170	void
		1171	max_outstanding (unsigned int maxreqs)
		1172	PROTOTYPE: $
		1173	CODE:
540	max_outstanding = nreqs;	1174	max_outstanding = maxreqs;
541		1175
542	void	1176	void
543	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1177	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
544	SV * pathname
545	int flags
546	int mode
547	SV * callback
548	PROTOTYPE: $$$;$
549	CODE:	1178	PPCODE:
550	{	1179	{
551	dREQ;	1180	dREQ;
552		1181
		1182	req->type = EIO_WD_OPEN;
		1183	req_set_path1 (req, pathname);
		1184
		1185	REQ_SEND;
		1186	}
		1187
		1188	void
		1189	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1190	PPCODE:
		1191	{
		1192	dREQ;
		1193
553	req->type = REQ_OPEN;	1194	req->type = EIO_OPEN;
554	req->data = newSVsv (pathname);	1195	req_set_path1 (req, pathname);
555	req->dataptr = SvPVbyte_nolen (req->data);
556	req->fd = flags;	1196	req->int1 = flags;
557	req->mode = mode;	1197	req->int2 = mode;
558		1198
559	send_req (req);	1199	REQ_SEND;
560	}	1200	}
561		1201
562	void	1202	void
563	aio_close(fh,callback=&PL_sv_undef)	1203	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
564	SV * fh
565	SV * callback
566	PROTOTYPE: $;$
567	ALIAS:	1204	ALIAS:
568	aio_close = REQ_CLOSE
569	aio_fsync = REQ_FSYNC	1205	aio_fsync = EIO_FSYNC
570	aio_fdatasync = REQ_FDATASYNC	1206	aio_fdatasync = EIO_FDATASYNC
		1207	aio_syncfs = EIO_SYNCFS
571	CODE:	1208	PPCODE:
572	{	1209	{
		1210	int fd = s_fileno_croak (fh, 0);
573	dREQ;	1211	dREQ;
574		1212
575	req->type = ix;	1213	req->type = ix;
576	req->fh = newSVsv (fh);	1214	req->sv1 = newSVsv (fh);
577	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1215	req->int1 = fd;
578		1216
579	send_req (req);	1217	REQ_SEND;
580	}	1218	}
581		1219
582	void	1220	void
		1221	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	int fd = s_fileno_croak (fh, 0);
		1225	dREQ;
		1226
		1227	req->type = EIO_SYNC_FILE_RANGE;
		1228	req->sv1 = newSVsv (fh);
		1229	req->int1 = fd;
		1230	req->offs = offset;
		1231	req->size = nbytes;
		1232	req->int2 = flags;
		1233
		1234	REQ_SEND;
		1235	}
		1236
		1237	void
		1238	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1239	PPCODE:
		1240	{
		1241	int fd = s_fileno_croak (fh, 0);
		1242	dREQ;
		1243
		1244	req->type = EIO_FALLOCATE;
		1245	req->sv1 = newSVsv (fh);
		1246	req->int1 = fd;
		1247	req->int2 = mode;
		1248	req->offs = offset;
		1249	req->size = len;
		1250
		1251	REQ_SEND;
		1252	}
		1253
		1254	void
		1255	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1256	PPCODE:
		1257	{
		1258	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1259	int fd = s_fileno_croak (fh, 0);
		1260	dREQ;
		1261
		1262	if (expect_false (close_fd < 0))
		1263	{
		1264	int pipefd [2];
		1265
		1266	if (
		1267	#ifdef _WIN32
		1268	_pipe (pipefd, 1, _O_BINARY) < 0
		1269	#else
		1270	pipe (pipefd) < 0
		1271	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1272	#endif
		1273	|| close (pipefd [1]) < 0
		1274	)
		1275	abort (); /*D*/
		1276
		1277	close_fd = pipefd [0];
		1278	}
		1279
		1280	req->type = EIO_DUP2;
		1281	req->int1 = close_fd;
		1282	req->sv2 = newSVsv (fh);
		1283	req->int2 = fd;
		1284
		1285	REQ_SEND;
		1286	}
		1287
		1288	void
		1289	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1290	PPCODE:
		1291	{
		1292	int fd = s_fileno_croak (fh, 0);
		1293	dREQ;
		1294
		1295	req->type = EIO_SEEK;
		1296	req->sv1 = newSVsv (fh);
		1297	req->int1 = fd;
		1298	req->offs = SvVAL64 (offset);
		1299	req->int2 = whence;
		1300
		1301	REQ_SEND;
		1302	}
		1303
		1304	void
583	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1305	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
584	SV * fh
585	UV offset
586	IV length
587	SV * data
588	IV dataoffset
589	SV * callback
590	ALIAS:	1306	ALIAS:
591	aio_read = REQ_READ	1307	aio_read = EIO_READ
592	aio_write = REQ_WRITE	1308	aio_write = EIO_WRITE
593	PROTOTYPE: $$$$$;$
594	CODE:	1309	PPCODE:
595	{	1310	{
596	aio_req req;
597	STRLEN svlen;	1311	STRLEN svlen;
		1312	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
598	char *svptr = SvPVbyte (data, svlen);	1313	char *svptr = SvPVbyte (data, svlen);
599		1314	UV len = SvUV (length);
600	SvUPGRADE (data, SVt_PV);
601	SvPOK_on (data);
602		1315
603	if (dataoffset < 0)	1316	if (dataoffset < 0)
604	dataoffset += svlen;	1317	dataoffset += svlen;
605		1318
606	if (dataoffset < 0 || dataoffset > svlen)	1319	if (dataoffset < 0 || dataoffset > svlen)
607	croak ("data offset outside of string");	1320	croak ("dataoffset outside of data scalar");
608		1321
609	if (ix == REQ_WRITE)	1322	if (ix == EIO_WRITE)
610	{	1323	{
611	/* write: check length and adjust. */	1324	/* write: check length and adjust. */
612	if (length < 0 || length + dataoffset > svlen)	1325	if (!SvOK (length) || len + dataoffset > svlen)
613	length = svlen - dataoffset;	1326	len = svlen - dataoffset;
614	}	1327	}
615	else	1328	else
616	{	1329	{
617	/* read: grow scalar as necessary */	1330	/* read: check type and grow scalar as necessary */
		1331	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
618	svptr = SvGROW (data, length + dataoffset);	1332	svptr = sv_grow (data, len + dataoffset + 1);
		1333	else if (SvCUR (data) < len + dataoffset)
		1334	croak ("length + dataoffset outside of scalar, and cannot grow");
619	}	1335	}
620
621	if (length < 0)
622	croak ("length must not be negative");
623		1336
624	{	1337	{
625	dREQ;	1338	dREQ;
626		1339
627	req->type = ix;	1340	req->type = ix;
628	req->fh = newSVsv (fh);	1341	req->sv1 = newSVsv (fh);
629	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1342	req->int1 = fd;
630	: IoOFP (sv_2io (fh)));	1343	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
631	req->offset = offset;	1344	req->size = len;
632	req->length = length;
633	req->data = SvREFCNT_inc (data);	1345	req->sv2 = SvREFCNT_inc (data);
634	req->dataptr = (char *)svptr + dataoffset;	1346	req->ptr2 = (char *)svptr + dataoffset;
		1347	req->stroffset = dataoffset;
635		1348
636	if (!SvREADONLY (data))	1349	if (!SvREADONLY (data))
637	{	1350	{
638	SvREADONLY_on (data);	1351	SvREADONLY_on (data);
639	req->data2ptr = (void *)data;	1352	req->flags |= FLAG_SV2_RO_OFF;
640	}	1353	}
641		1354
642	send_req (req);	1355	REQ_SEND;
643	}	1356	}
644	}	1357	}
645		1358
646	void	1359	void
647	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1360	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
648	SV * fh
649	UV offset
650	IV length
651	SV * callback
652	PROTOTYPE: $$$;$
653	CODE:
654	{
655	dREQ;
656
657	req->type = REQ_READAHEAD;
658	req->fh = newSVsv (fh);
659	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
660	req->offset = offset;
661	req->length = length;
662
663	send_req (req);
664	}
665
666	void
667	aio_stat(fh_or_path,callback=&PL_sv_undef)
668	SV * fh_or_path
669	SV * callback
670	ALIAS:	1361	ALIAS:
671	aio_stat = REQ_STAT	1362	aio_ioctl = EIO_IOCTL
672	aio_lstat = REQ_LSTAT	1363	aio_fcntl = EIO_FCNTL
673	CODE:	1364	PPCODE:
674	{	1365	{
675	dREQ;	1366	int fd = s_fileno_croak (fh, 0);
		1367	char *svptr;
676		1368
677	New (0, req->statdata, 1, Stat_t);	1369	if (SvPOK (arg) || !SvNIOK (arg))
678	if (!req->statdata)
679	{	1370	{
680	free_req (req);	1371	STRLEN svlen;
681	croak ("out of memory during aio_req->statdata allocation");	1372	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
682	}	1373	#ifdef IOCPARM_LEN
		1374	STRLEN need = IOCPARM_LEN (request);
		1375	#else
		1376	STRLEN need = 256;
		1377	#endif
683		1378
684	if (SvPOK (fh_or_path))	1379	if (svlen < need)
685	{	1380	svptr = SvGROW (arg, need);
686	req->type = ix;
687	req->data = newSVsv (fh_or_path);
688	req->dataptr = SvPVbyte_nolen (req->data);
689	}	1381	}
690	else	1382	else
		1383	svptr = (char *)SvIV (arg);
		1384
691	{	1385	{
		1386	dREQ;
		1387
692	req->type = REQ_FSTAT;	1388	req->type = ix;
693	req->fh = newSVsv (fh_or_path);	1389	req->sv1 = newSVsv (fh);
694	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1390	req->int1 = fd;
		1391	req->int2 = (long)request;
		1392	req->sv2 = SvREFCNT_inc (arg);
		1393	req->ptr2 = svptr;
		1394
		1395	REQ_SEND;
695	}	1396	}
696
697	send_req (req);
698	}	1397	}
699		1398
700	void	1399	void
701	aio_unlink(pathname,callback=&PL_sv_undef)	1400	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
702	SV * pathname
703	SV * callback
704	ALIAS:	1401	ALIAS:
705	aio_unlink = REQ_UNLINK	1402	aio_readlink = EIO_READLINK
706	aio_rmdir = REQ_RMDIR	1403	aio_realpath = EIO_REALPATH
		1404	PPCODE:
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req_set_path1 (req, pathname);
		1410
		1411	REQ_SEND;
		1412	}
		1413
		1414	void
		1415	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1416	PPCODE:
		1417	{
		1418	int ifd = s_fileno_croak (in_fh , 0);
		1419	int ofd = s_fileno_croak (out_fh, 1);
		1420	dREQ;
		1421
		1422	req->type = EIO_SENDFILE;
		1423	req->sv1 = newSVsv (out_fh);
		1424	req->int1 = ofd;
		1425	req->sv2 = newSVsv (in_fh);
		1426	req->int2 = ifd;
		1427	req->offs = in_offset;
		1428	req->size = length;
		1429
		1430	REQ_SEND;
		1431	}
		1432
		1433	void
		1434	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1435	PPCODE:
		1436	{
		1437	int fd = s_fileno_croak (fh, 0);
		1438	dREQ;
		1439
		1440	req->type = EIO_READAHEAD;
		1441	req->sv1 = newSVsv (fh);
		1442	req->int1 = fd;
		1443	req->offs = offset;
		1444	req->size = length;
		1445
		1446	REQ_SEND;
		1447	}
		1448
		1449	void
		1450	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1451	ALIAS:
		1452	aio_stat = EIO_STAT
		1453	aio_lstat = EIO_LSTAT
		1454	aio_statvfs = EIO_STATVFS
		1455	PPCODE:
		1456	{
		1457	dREQ;
		1458
		1459	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1460
		1461	REQ_SEND;
		1462	}
		1463
		1464	UV
		1465	major (UV dev)
		1466	ALIAS:
		1467	minor = 1
707	CODE:	1468	CODE:
		1469	RETVAL = ix ? minor (dev) : major (dev);
		1470	OUTPUT:
		1471	RETVAL
		1472
		1473	UV
		1474	makedev (UV maj, UV min)
		1475	CODE:
		1476	RETVAL = makedev (maj, min);
		1477	OUTPUT:
		1478	RETVAL
		1479
		1480	void
		1481	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1482	PPCODE:
		1483	{
		1484	dREQ;
		1485
		1486	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1487	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1488	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1489
		1490	REQ_SEND;
		1491	}
		1492
		1493	void
		1494	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1495	PPCODE:
		1496	{
		1497	dREQ;
		1498
		1499	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1500	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1501
		1502	REQ_SEND;
		1503	}
		1504
		1505	void
		1506	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1507	PPCODE:
		1508	{
		1509	dREQ;
		1510
		1511	req->int2 = mode;
		1512	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1513
		1514	REQ_SEND;
		1515	}
		1516
		1517	void
		1518	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1519	PPCODE:
		1520	{
		1521	dREQ;
		1522
		1523	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1524	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1525	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1526
		1527	REQ_SEND;
		1528	}
		1529
		1530	void
		1531	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1532	PPCODE:
		1533	{
		1534	dREQ;
		1535
		1536	req->type = EIO_READDIR;
		1537	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1538
		1539	if (flags & EIO_READDIR_DENTS)
		1540	req->int1 |= EIO_READDIR_CUSTOM2;
		1541
		1542	req_set_path1 (req, pathname);
		1543
		1544	REQ_SEND;
		1545	}
		1546
		1547	void
		1548	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1549	PPCODE:
		1550	{
		1551	dREQ;
		1552
		1553	req->type = EIO_MKDIR;
		1554	req->int2 = mode;
		1555	req_set_path1 (req, pathname);
		1556
		1557	REQ_SEND;
		1558	}
		1559
		1560	void
		1561	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1562	ALIAS:
		1563	aio_unlink = EIO_UNLINK
		1564	aio_rmdir = EIO_RMDIR
		1565	aio_readdir = EIO_READDIR
		1566	PPCODE:
708	{	1567	{
709	dREQ;	1568	dREQ;
710		1569
711	req->type = ix;	1570	req->type = ix;
712	req->data = newSVsv (pathname);	1571	req_set_path1 (req, pathname);
713	req->dataptr = SvPVbyte_nolen (req->data);
714
715	send_req (req);
716	}
717		1572
		1573	REQ_SEND;
		1574	}
		1575
718	void	1576	void
719	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1577	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
720	SV * oldpath	1578	ALIAS:
721	SV * newpath	1579	aio_link = EIO_LINK
722	SV * callback	1580	aio_symlink = EIO_SYMLINK
		1581	aio_rename = EIO_RENAME
723	CODE:	1582	PPCODE:
724	{	1583	{
		1584	eio_wd wd2 = 0;
725	dREQ;	1585	dREQ;
726		1586
727	req->type = REQ_SYMLINK;	1587	req->type = ix;
728	req->fh = newSVsv (oldpath);	1588	req_set_path1 (req, oldpath);
729	req->data2ptr = SvPVbyte_nolen (req->fh);	1589	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
730	req->data = newSVsv (newpath);	1590	req->int3 = (long)wd2;
731	req->dataptr = SvPVbyte_nolen (req->data);
732		1591
733	send_req (req);	1592	REQ_SEND;
734	}	1593	}
735		1594
736	void	1595	void
737	flush()	1596	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
738	PROTOTYPE:	1597	PPCODE:
		1598	{
		1599	dREQ;
		1600
		1601	req->type = EIO_MKNOD;
		1602	req->int2 = (mode_t)mode;
		1603	req->offs = dev;
		1604	req_set_path1 (req, pathname);
		1605
		1606	REQ_SEND;
		1607	}
		1608
		1609	void
		1610	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1611	ALIAS:
		1612	aio_mtouch = EIO_MTOUCH
		1613	aio_msync = EIO_MSYNC
		1614	PPCODE:
		1615	{
		1616	STRLEN svlen;
		1617	char *svptr = SvPVbyte (data, svlen);
		1618	UV len = SvUV (length);
		1619
		1620	if (flags < 0)
		1621	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1622
		1623	if (offset < 0)
		1624	offset += svlen;
		1625
		1626	if (offset < 0 || offset > svlen)
		1627	croak ("offset outside of scalar");
		1628
		1629	if (!SvOK (length) || len + offset > svlen)
		1630	len = svlen - offset;
		1631
		1632	{
		1633	dREQ;
		1634
		1635	req->type = ix;
		1636	req->sv2 = SvREFCNT_inc (data);
		1637	req->ptr2 = (char *)svptr + offset;
		1638	req->size = len;
		1639	req->int1 = flags;
		1640
		1641	REQ_SEND;
		1642	}
		1643	}
		1644
		1645	void
		1646	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1647	PPCODE:
		1648	{
		1649	STRLEN svlen;
		1650	char *svptr = SvPVbyte (data, svlen);
		1651	UV len = SvUV (length);
		1652
		1653	if (offset < 0)
		1654	offset += svlen;
		1655
		1656	if (offset < 0 || offset > svlen)
		1657	croak ("offset outside of scalar");
		1658
		1659	if (!SvOK (length) || len + offset > svlen)
		1660	len = svlen - offset;
		1661
		1662	{
		1663	dREQ;
		1664
		1665	req->type = EIO_MLOCK;
		1666	req->sv2 = SvREFCNT_inc (data);
		1667	req->ptr2 = (char *)svptr + offset;
		1668	req->size = len;
		1669
		1670	REQ_SEND;
		1671	}
		1672	}
		1673
		1674	void
		1675	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1676	PPCODE:
		1677	{
		1678	dREQ;
		1679
		1680	req->type = EIO_MLOCKALL;
		1681	req->int1 = flags;
		1682
		1683	REQ_SEND;
		1684	}
		1685
		1686	void
		1687	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1688	PPCODE:
		1689	{
		1690	int fd = s_fileno_croak (fh, 0);
		1691	dREQ;
		1692
		1693	req->type = EIO_CUSTOM;
		1694	req->sv1 = newSVsv (fh);
		1695	req->int1 = fd;
		1696
		1697	req->feed = fiemap;
		1698	#if HAVE_FIEMAP
		1699	/* keep our fingers crossed that the next two types are 64 bit */
		1700	req->offs = start;
		1701	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1702	req->int2 = flags;
		1703	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1704	#endif
		1705
		1706	REQ_SEND;
		1707	}
		1708
		1709	void
		1710	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1711	PPCODE:
		1712	{
		1713	dREQ;
		1714
		1715	req->type = EIO_BUSY;
		1716	req->nv1 = delay < 0. ? 0. : delay;
		1717
		1718	REQ_SEND;
		1719	}
		1720
		1721	void
		1722	aio_group (SV *callback = &PL_sv_undef)
		1723	PPCODE:
		1724	{
		1725	dREQ;
		1726
		1727	req->type = EIO_GROUP;
		1728
		1729	PUTBACK;
		1730	req_submit (req);
		1731	SPAGAIN;
		1732
		1733	XPUSHs (req_sv (req, aio_grp_stash));
		1734	}
		1735
		1736	void
		1737	aio_nop (SV *callback = &PL_sv_undef)
		1738	ALIAS:
		1739	aio_nop = EIO_NOP
		1740	aio_sync = EIO_SYNC
		1741	PPCODE:
		1742	{
		1743	dREQ;
		1744
		1745	req->type = ix;
		1746
		1747	REQ_SEND;
		1748	}
		1749
		1750	int
		1751	aioreq_pri (int pri = NO_INIT)
739	CODE:	1752	CODE:
		1753	RETVAL = next_pri;
		1754	if (items > 0)
		1755	{
		1756	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1757	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1758	next_pri = pri;
		1759	}
		1760	OUTPUT:
		1761	RETVAL
		1762
		1763	void
		1764	aioreq_nice (int nice = 0)
		1765	CODE:
		1766	nice = next_pri - nice;
		1767	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1768	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1769	next_pri = nice;
		1770
		1771	void
		1772	flush ()
		1773	CODE:
740	while (nreqs)	1774	while (eio_nreqs ())
741	{	1775	{
742	poll_wait ();	1776	poll_wait ();
743	poll_cb ();	1777	poll_cb ();
744	}	1778	}
745		1779
746	void	1780	int
747	poll()	1781	poll ()
748	PROTOTYPE:
749	CODE:	1782	CODE:
750	if (nreqs)
751	{
752	poll_wait ();	1783	poll_wait ();
753	poll_cb ();	1784	RETVAL = poll_cb ();
754	}
755
756	int
757	poll_fileno()
758	PROTOTYPE:
759	CODE:
760	RETVAL = respipe [0];
761	OUTPUT:	1785	OUTPUT:
762	RETVAL	1786	RETVAL
763		1787
764	int	1788	int
		1789	poll_fileno ()
		1790	CODE:
		1791	RETVAL = s_epipe_fd (&respipe);
		1792	OUTPUT:
		1793	RETVAL
		1794
		1795	int
765	poll_cb(...)	1796	poll_cb (...)
766	PROTOTYPE:	1797	PROTOTYPE:
767	CODE:	1798	CODE:
768	RETVAL = poll_cb ();	1799	RETVAL = poll_cb ();
769	OUTPUT:	1800	OUTPUT:
770	RETVAL	1801	RETVAL
771		1802
772	void	1803	void
773	poll_wait()	1804	poll_wait ()
774	PROTOTYPE:
775	CODE:	1805	CODE:
776	if (nreqs)
777	poll_wait ();	1806	poll_wait ();
778		1807
779	int	1808	int
780	nreqs()	1809	nreqs ()
781	PROTOTYPE:
782	CODE:	1810	CODE:
783	RETVAL = nreqs;	1811	RETVAL = eio_nreqs ();
784	OUTPUT:	1812	OUTPUT:
785	RETVAL	1813	RETVAL
786		1814
		1815	int
		1816	nready ()
		1817	CODE:
		1818	RETVAL = eio_nready ();
		1819	OUTPUT:
		1820	RETVAL
		1821
		1822	int
		1823	npending ()
		1824	CODE:
		1825	RETVAL = eio_npending ();
		1826	OUTPUT:
		1827	RETVAL
		1828
		1829	int
		1830	nthreads ()
		1831	CODE:
		1832	RETVAL = eio_nthreads ();
		1833	OUTPUT:
		1834	RETVAL
		1835
		1836	int
		1837	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1838	CODE:
		1839	RETVAL = posix_fadvise (fh, offset, length, advice);
		1840	OUTPUT:
		1841	RETVAL
		1842
		1843	IV
		1844	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1845	CODE:
		1846	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1847	OUTPUT:
		1848	RETVAL
		1849
		1850	void
		1851	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1852	PPCODE:
		1853	sv_unmagic (scalar, MMAP_MAGIC);
		1854	{
		1855	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1856	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1857	if (addr == (void *)-1)
		1858	XSRETURN_NO;
		1859
		1860	sv_force_normal (scalar);
		1861
		1862	/* we store the length in mg_obj, as namlen is I32 :/ */
		1863	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1864	->mg_obj = (SV *)length;
		1865
		1866	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1867
		1868	if (!(prot & PROT_WRITE))
		1869	SvREADONLY_on (scalar);
		1870
		1871	if (SvLEN (scalar))
		1872	Safefree (SvPVX (scalar));
		1873
		1874	SvPVX (scalar) = (char *)addr;
		1875	SvCUR_set (scalar, length);
		1876	SvLEN_set (scalar, 0);
		1877	SvPOK_only (scalar);
		1878
		1879	XSRETURN_YES;
		1880	}
		1881
		1882	void
		1883	munmap (SV *scalar)
		1884	CODE:
		1885	sv_unmagic (scalar, MMAP_MAGIC);
		1886
		1887	int
		1888	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1889	ALIAS:
		1890	mprotect = 1
		1891	CODE:
		1892	{
		1893	STRLEN svlen;
		1894	void *addr = SvPVbyte (scalar, svlen);
		1895	STRLEN len = SvUV (length);
		1896
		1897	if (offset < 0)
		1898	offset += svlen;
		1899
		1900	if (offset < 0 || offset > svlen)
		1901	croak ("offset outside of scalar");
		1902
		1903	if (!SvOK (length) || len + offset > svlen)
		1904	len = svlen - offset;
		1905
		1906	addr = (void *)(((intptr_t)addr) + offset);
		1907	eio_page_align (&addr, &len);
		1908
		1909	switch (ix)
		1910	{
		1911	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1912	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1913	}
		1914	}
		1915	OUTPUT:
		1916	RETVAL
		1917
		1918	int
		1919	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1920	CODE:
		1921	{
		1922	STRLEN svlen;
		1923	void *addr = SvPVbyte (scalar, svlen);
		1924	size_t len = SvUV (length);
		1925
		1926	if (offset < 0)
		1927	offset += svlen;
		1928
		1929	if (offset < 0 || offset > svlen)
		1930	croak ("offset outside of scalar");
		1931
		1932	if (!SvOK (length) || len + offset > svlen)
		1933	len = svlen - offset;
		1934
		1935	addr = (void *)(((intptr_t)addr) + offset);
		1936	eio_page_align (&addr, &len);
		1937	#if _POSIX_MEMLOCK_RANGE
		1938	RETVAL = munlock (addr, len);
		1939	#else
		1940	RETVAL = EIO_ENOSYS ();
		1941	#endif
		1942	}
		1943	OUTPUT:
		1944	RETVAL
		1945
		1946	int
		1947	munlockall ()
		1948	CODE:
		1949	#if _POSIX_MEMLOCK
		1950	munlockall ();
		1951	#else
		1952	RETVAL = EIO_ENOSYS ();
		1953	#endif
		1954	OUTPUT:
		1955	RETVAL
		1956
		1957	int
		1958	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1959	CODE:
		1960	{
		1961	#if HAVE_LINUX_SPLICE
		1962	loff_t off_in_, off_out_;
		1963	RETVAL = splice (
		1964	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1965	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1966	length, flags
		1967	);
		1968	#else
		1969	RETVAL = EIO_ENOSYS ();
		1970	#endif
		1971	}
		1972	OUTPUT:
		1973	RETVAL
		1974
		1975	int
		1976	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1977	CODE:
		1978	#if HAVE_LINUX_SPLICE
		1979	RETVAL = tee (rfh, wfh, length, flags);
		1980	#else
		1981	RETVAL = EIO_ENOSYS ();
		1982	#endif
		1983	OUTPUT:
		1984	RETVAL
		1985
		1986	int
		1987	pipesize (aio_rfd rfh, int new_size = -1)
		1988	PROTOTYPE: $;$
		1989	CODE:
		1990	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1991	if (new_size >= 0)
		1992	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1993	else
		1994	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1995	#else
		1996	errno = ENOSYS;
		1997	RETVAL = -1;
		1998	#endif
		1999	OUTPUT:
		2000	RETVAL
		2001
		2002	void
		2003	pipe2 (int flags = 0)
		2004	PROTOTYPE: ;$
		2005	PPCODE:
		2006	{
		2007	int fd[2];
		2008	int res;
		2009
		2010	if (flags)
		2011	#if HAVE_PIPE2
		2012	res = pipe2 (fd, flags);
		2013	#else
		2014	res = (errno = ENOSYS, -1);
		2015	#endif
		2016	else
		2017	res = pipe (fd);
		2018
		2019	if (!res)
		2020	{
		2021	EXTEND (SP, 2);
		2022	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2023	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2024	}
		2025	}
		2026
		2027	void _on_next_submit (SV *cb)
		2028	CODE:
		2029	SvREFCNT_dec (on_next_submit);
		2030	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2031
		2032	PROTOTYPES: DISABLE
		2033
		2034	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2035
		2036	BOOT:
		2037	{
		2038	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2039	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2040	}
		2041
		2042	void
		2043	DESTROY (SV *self)
		2044	CODE:
		2045	{
		2046	aio_wd wd = SvAIO_WD (self);
		2047	#if HAVE_AT
		2048	{
		2049	SV *callback = &PL_sv_undef;
		2050	dREQ; /* clobbers next_pri :/ */
		2051	next_pri = req->pri; /* restore next_pri */
		2052	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2053	req->type = EIO_WD_CLOSE;
		2054	req->wd = wd;
		2055	REQ_SEND;
		2056	}
		2057	#else
		2058	eio_wd_close_sync (wd);
		2059	#endif
		2060	}
		2061
		2062	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2063
		2064	void
		2065	cancel (aio_req_ornot req)
		2066	CODE:
		2067	eio_cancel (req);
		2068
		2069	void
		2070	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2071	PPCODE:
		2072	{
		2073	if (GIMME_V != G_VOID)
		2074	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2075
		2076	if (items > 1)
		2077	{
		2078	SV *cb_cv = get_cb (callback);
		2079
		2080	SvREFCNT_dec (req->callback);
		2081	req->callback = SvREFCNT_inc (cb_cv);
		2082	}
		2083	}
		2084
		2085	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2086
		2087	void
		2088	add (aio_req grp, ...)
		2089	PPCODE:
		2090	{
		2091	int i;
		2092
		2093	if (grp->int1 == 2)
		2094	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2095
		2096	for (i = 1; i < items; ++i )
		2097	{
		2098	aio_req req;
		2099
		2100	if (GIMME_V != G_VOID)
		2101	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2102
		2103	req = SvAIO_REQ (ST (i));
		2104
		2105	if (req)
		2106	eio_grp_add (grp, req);
		2107	}
		2108	}
		2109
		2110	void
		2111	cancel_subs (aio_req_ornot req)
		2112	CODE:
		2113	req_cancel_subs (req);
		2114
		2115	void
		2116	result (aio_req grp, ...)
		2117	CODE:
		2118	{
		2119	int i;
		2120	AV *av;
		2121
		2122	grp->errorno = errno;
		2123
		2124	av = newAV ();
		2125	av_extend (av, items - 1);
		2126
		2127	for (i = 1; i < items; ++i )
		2128	av_push (av, newSVsv (ST (i)));
		2129
		2130	SvREFCNT_dec (grp->sv1);
		2131	grp->sv1 = (SV *)av;
		2132	}
		2133
		2134	void
		2135	errno (aio_req grp, int errorno = errno)
		2136	CODE:
		2137	grp->errorno = errorno;
		2138
		2139	void
		2140	limit (aio_req grp, int limit)
		2141	CODE:
		2142	eio_grp_limit (grp, limit);
		2143
		2144	void
		2145	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2146	CODE:
		2147	{
		2148	SvREFCNT_dec (grp->sv2);
		2149	grp->sv2 = newSVsv (callback);
		2150	grp->feed = aio_grp_feed;
		2151
		2152	if (grp->int2 <= 0)
		2153	grp->int2 = 2;
		2154
		2155	eio_grp_limit (grp, grp->int2);
		2156	}
		2157

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