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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC vs.
Revision 1.231 by root, Wed Feb 11 19:32:36 2015 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
26	#include <limits.h>	16	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	17	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	18	#include <sched.h>
31		19
32	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>
35	# elif __freebsd
36	# include <sys/socket.h>
37	# include <sys/uio.h>	21	# include <sys/mman.h>
38	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. on't complain if this fails for you.
		27	*/
		28	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		29	# include <linux/fs.h>
		30	# ifdef FS_IOC_FIEMAP
		31	# include <linux/types.h>
		32	# include <linux/fiemap.h>
		33	# define HAVE_FIEMAP 1
		34	# endif
		35	#endif
		36
		37	/* perl namespace pollution */
		38	#undef VERSION
		39
		40	/* perl stupidly overrides readdir and maybe others */
		41	/* with thread-unsafe versions, imagine that :( */
		42	#undef readdir
		43	#undef opendir
		44	#undef closedir
		45
		46	#ifdef _WIN32
		47
		48	// perl overrides all those nice libc functions
		49
		50	#undef malloc
		51	#undef free
		52	#undef open
		53	#undef read
		54	#undef write
		55	#undef send
		56	#undef recv
		57	#undef stat
		58	#undef lstat
		59	#undef fstat
		60	#undef truncate
		61	#undef ftruncate
		62	#undef open
		63	#undef link
		64	#undef close
		65	#undef unlink
		66	#undef mkdir
		67	#undef rmdir
		68	#undef rename
		69	#undef lseek
		70	#undef opendir
		71	#undef readdir
		72	#undef closedir
		73	#undef chmod
		74	#undef fchmod
		75	#undef dup
		76	#undef dup2
		77	#undef abort
		78	#undef pipe
		79
		80	#define EIO_STRUCT_STAT struct _stati64
		81	#define EIO_STRUCT_STATI64
		82
		83	#else
		84
39	# include <sys/socket.h>	85	#include <sys/time.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	86	#include <sys/select.h>
		87	#include <unistd.h>
		88	#include <utime.h>
		89	#include <signal.h>
		90
		91	#define EIO_STRUCT_STAT Stat_t
		92
		93	#endif
		94
		95	/*****************************************************************************/
		96
		97	#if __GNUC__ >= 3
		98	# define expect(expr,value) __builtin_expect ((expr),(value))
		99	#else
		100	# define expect(expr,value) (expr)
		101	#endif
		102
		103	#define expect_false(expr) expect ((expr) != 0, 0)
		104	#define expect_true(expr) expect ((expr) != 0, 1)
		105
		106	/*****************************************************************************/
		107
		108	typedef SV SV8; /* byte-sv, used for argument-checking */
		109	typedef int aio_rfd; /* read file desriptor */
		110	typedef int aio_wfd; /* write file descriptor */
		111
		112	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		113
		114	#define EIO_REQ_MEMBERS \
		115	SV *callback; \
		116	SV *sv1, *sv2; \
		117	SV *sv3, *sv4; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	static int req_invoke (eio_req *req);
		127	#define EIO_FINISH(req) req_invoke (req)
		128	static void req_destroy (eio_req *grp);
		129	#define EIO_DESTROY(req) req_destroy (req)
		130
		131	#include "libeio/eio.c"
		132
		133	#if !HAVE_POSIX_FADVISE
		134	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#if !HAVE_POSIX_MADVISE
		138	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		139	#endif
		140
		141	#ifndef MAP_ANONYMOUS
		142	# ifdef MAP_ANON
		143	# define MAP_ANONYMOUS MAP_ANON
42	# else	144	# else
43	# error sendfile support requested but not available	145	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	146	# endif
45	#endif	147	#endif
46		148
47	/* used for struct dirent, AIX doesn't provide it */	149	/* defines all sorts of constants to 0 unless they are already defined */
48	#ifndef NAME_MAX	150	#include "def0.h"
49	# define NAME_MAX 4096
50	#endif
51		151
52	#if __ia64	152	#ifndef makedev
53	# define STACKSIZE 65536	153	# define makedev(maj,min) (((maj) << 8) | (min))
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	154	#endif
		155	#ifndef major
		156	# define major(dev) ((dev) >> 8)
		157	#endif
		158	#ifndef minor
		159	# define minor(dev) ((dev) & 0xff)
		160	#endif
59		161
60	/* buffer size for various temporary buffers */	162	#if PAGESIZE <= 0
61	#define AIO_BUFSIZE 65536	163	# define PAGESIZE sysconf (_SC_PAGESIZE)
		164	#endif
62		165
63	#define dBUF \	166	/*****************************************************************************/
64	char *aio_buf = malloc (AIO_BUFSIZE); \	167
65	if (!aio_buf) \	168	static void
		169	fiemap (eio_req *req)
		170	{
		171	req->result = -1;
		172
		173	#if HAVE_FIEMAP
		174	/* assume some c99 */
		175	struct fiemap *fiemap = 0;
		176	size_t end_offset;
		177	int count = req->int3;
		178
		179	req->flags |= EIO_FLAG_PTR1_FREE;
		180
		181	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		182	/* increase in 3.5kb steps */
		183	if (count < 0)
		184	count = 8;
		185
		186	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		187	errno = ENOMEM;
		188	if (!fiemap)
66	return -1;	189	return;
67		190
68	#define fBUF free (aio_buf)	191	req->ptr1 = fiemap;
69		192
70	enum {	193	fiemap->fm_start = req->offs;
71	REQ_QUIT,	194	fiemap->fm_length = req->size;
72	REQ_OPEN, REQ_CLOSE,	195	fiemap->fm_flags = req->int2;
73	REQ_READ, REQ_WRITE, REQ_READAHEAD,	196	fiemap->fm_extent_count = count;
74	REQ_SENDFILE,
75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
76	REQ_FSYNC, REQ_FDATASYNC,
77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
78	REQ_READDIR,
79	REQ_LINK, REQ_SYMLINK,
80	REQ_GROUP, REQ_NOP,
81	REQ_BUSY,
82	};
83		197
84	#define AIO_REQ_KLASS "IO::AIO::REQ"	198	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
85	#define AIO_GRP_KLASS "IO::AIO::GRP"	199	return;
86		200
87	typedef struct aio_cb	201	if (req->int3 >= 0 /* not autosizing */
88	{	202	|| !fiemap->fm_mapped_extents /* no more extents */
89	struct aio_cb *volatile next;	203	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		204	goto done;
90		205
91	SV *data, *callback;	206	/* else we have to loop -
92	SV *fh, *fh2;	207	* it would be tempting (actually I tried that first) to just query the
93	void *dataptr, *data2ptr;	208	* number of extents needed, but linux often feels like not returning all
94	Stat_t *statdata;	209	* extents, without telling us it left any out. this complicates
95	off_t offset;	210	* this quite a bit.
96	size_t length;
97	ssize_t result;
98
99	STRLEN dataoffset;
100	int type;
101	int fd, fd2;
102	int errorno;
103	mode_t mode; /* open */
104
105	unsigned char flags;
106	unsigned char pri;
107
108	SV *self; /* the perl counterpart of this request, if any */
109	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
110	} aio_cb;
111
112	enum {
113	FLAG_CANCELLED = 0x01,
114	};
115
116	typedef aio_cb *aio_req;
117	typedef aio_cb *aio_req_ornot;
118
119	enum {
120	PRI_MIN = -4,
121	PRI_MAX = 4,
122
123	DEFAULT_PRI = 0,
124	PRI_BIAS = -PRI_MIN,
125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
126	};
127
128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
129
130	static int started, wanted;
131	static volatile int nreqs;
132	static int max_outstanding = 1<<30;
133	static int respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
144
145	/*
146	* a somewhat faster data structure might be nice, but
147	* with 8 priorities this actually needs <20 insns
148	* per shift, the most expensive operation.
149	*/	211	*/
150	typedef struct {
151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
152	int size;
153	} reqq;
154		212
155	static reqq req_queue;	213	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
156	static reqq res_queue;
157		214
158	int reqq_push (reqq *q, aio_req req)	215	for (;;)
159	{
160	int pri = req->pri;
161	req->next = 0;
162
163	if (q->qe[pri])
164	{	216	{
165	q->qe[pri]->next = req;	217	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
166	q->qe[pri] = req;	218	char scratch[3072];
167	}	219	struct fiemap *incmap = (struct fiemap *)scratch;
168	else
169	q->qe[pri] = q->qs[pri] = req;
170		220
171	return q->size++;	221	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
172	}	222	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		223	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		224	incmap->fm_flags = fiemap->fm_flags;
		225	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
173		226
174	aio_req reqq_shift (reqq *q)	227	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
175	{
176	int pri;
177
178	if (!q->size)
179	return 0;	228	return;
180		229
181	--q->size;	230	if (!incmap->fm_mapped_extents)
		231	goto done;
182		232
183	for (pri = NUM_PRI; pri--; )	233	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
184	{	234	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
185	aio_req req = q->qs[pri];	235	errno = ENOMEM;
186
187	if (req)	236	if (!fiemap)
		237	return;
		238
		239	req->ptr1 = fiemap;
		240
		241	for (count = 0; count < incmap->fm_mapped_extents; ++count)
188	{	242	{
189	if (!(q->qs[pri] = req->next))	243	struct fiemap_extent *e = incmap->fm_extents + count;
190	q->qe[pri] = 0;
191		244
192	return req;	245	if (e->fe_logical + e->fe_length >= end_offset)
		246	goto done;
		247
		248	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		249
		250	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		251	goto done;
		252
193	}	253	}
194	}	254	}
195		255
196	abort ();	256	done:
197	}	257	req->result = 0;
198		258
		259	#else
		260	errno = ENOSYS;
		261	#endif
		262	}
		263
		264	/*****************************************************************************/
		265
		266	enum {
		267	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		268	};
		269
		270	typedef eio_req *aio_req;
		271	typedef eio_req *aio_req_ornot;
		272	typedef eio_wd aio_wd;
		273
		274	static SV *on_next_submit;
		275	static int next_pri = EIO_PRI_DEFAULT;
		276	static int max_outstanding;
		277
		278	static s_epipe respipe;
		279
		280	static void req_destroy (aio_req req);
199	static void req_invoke (aio_req req);	281	static void req_cancel (aio_req req);
200	static void req_free (aio_req req);	282
		283	static void
		284	want_poll (void)
		285	{
		286	/* write a dummy byte to the pipe so fh becomes ready */
		287	s_epipe_signal (&respipe);
		288	}
		289
		290	static void
		291	done_poll (void)
		292	{
		293	/* read any signals sent by the worker threads */
		294	s_epipe_drain (&respipe);
		295	}
201		296
202	/* must be called at most once */	297	/* must be called at most once */
203	static SV *req_sv (aio_req req, const char *klass)	298	static SV *
		299	req_sv (aio_req req, HV *stash)
204	{	300	{
205	if (!req->self)	301	if (!req->self)
206	{	302	{
207	req->self = (SV *)newHV ();	303	req->self = (SV *)newHV ();
208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
209	}	305	}
210		306
211	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	307	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
212	}	308	}
213		309
214	static aio_req SvAIO_REQ (SV *sv)	310	static SV *
		311	newSVaio_wd (aio_wd wd)
		312	{
		313	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		314	}
		315
		316	static aio_req
		317	SvAIO_REQ (SV *sv)
215	{	318	{
216	MAGIC *mg;	319	MAGIC *mg;
217		320
218	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	321	if (!SvROK (sv)
		322	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		323	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		324	&& SvSTASH (SvRV (sv)) != aio_req_stash
		325	&& !sv_derived_from (sv, "IO::AIO::REQ")))
219	croak ("object of class " AIO_REQ_KLASS " expected");	326	croak ("object of class IO::AIO::REQ expected");
220		327
221	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	328	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
222		329
223	return mg ? (aio_req)mg->mg_ptr : 0;	330	return mg ? (aio_req)mg->mg_ptr : 0;
224	}	331	}
225		332
		333	static aio_wd
		334	SvAIO_WD (SV *sv)
		335	{
		336	if (!SvROK (sv)
		337	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		338	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		339	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		340
		341	return (aio_wd)(long)SvIVX (SvRV (sv));
		342	}
		343
		344	static void
226	static void aio_grp_feed (aio_req grp)	345	aio_grp_feed (aio_req grp)
227	{	346	{
228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	347	if (grp->sv2 && SvOK (grp->sv2))
229	{	348	{
230	int old_len = grp->length;
231
232	if (grp->fh2 && SvOK (grp->fh2))
233	{
234	dSP;	349	dSP;
235		350
236	ENTER;	351	ENTER;
237	SAVETMPS;	352	SAVETMPS;
238	PUSHMARK (SP);	353	PUSHMARK (SP);
239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	354	XPUSHs (req_sv (grp, aio_grp_stash));
240	PUTBACK;	355	PUTBACK;
241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	356	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
242	SPAGAIN;	357	SPAGAIN;
243	FREETMPS;	358	FREETMPS;
244	LEAVE;	359	LEAVE;
245	}
246
247	/* stop if no progress has been made */
248	if (old_len == grp->length)
249	{
250	SvREFCNT_dec (grp->fh2);
251	grp->fh2 = 0;
252	break;
253	}
254	}	360	}
255	}	361	}
256		362
257	static void aio_grp_dec (aio_req grp)	363	static void
		364	req_submit (eio_req *req)
258	{	365	{
259	--grp->length;	366	eio_submit (req);
260		367
261	/* call feeder, if applicable */	368	if (expect_false (on_next_submit))
262	aio_grp_feed (grp);
263
264	/* finish, if done */
265	if (!grp->length && grp->fd)
266	{	369	{
267	req_invoke (grp);	370	dSP;
268	req_free (grp);	371	SV *cb = sv_2mortal (on_next_submit);
		372
		373	on_next_submit = 0;
		374
		375	PUSHMARK (SP);
		376	PUTBACK;
		377	call_sv (cb, G_DISCARD | G_EVAL);
269	}	378	}
270	}	379	}
271		380
272	static void poll_wait ()	381	static int
		382	req_invoke (eio_req *req)
273	{	383	{
274	fd_set rfd;	384	if (req->flags & FLAG_SV2_RO_OFF)
		385	SvREADONLY_off (req->sv2);
275		386
276	while (nreqs)	387	if (!EIO_CANCELLED (req) && req->callback)
277	{	388	{
278	int size;
279	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
280	pthread_mutex_lock (&reslock);
281	#endif
282	size = res_queue.size;
283	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
284	pthread_mutex_unlock (&reslock);
285	#endif
286
287	if (size)
288	return;
289
290	FD_ZERO(&rfd);
291	FD_SET(respipe [0], &rfd);
292
293	select (respipe [0] + 1, &rfd, 0, 0, 0);
294	}
295	}
296
297	static void req_invoke (aio_req req)
298	{
299	dSP;	389	dSP;
300		390	static SV *sv_result_cache; /* caches the result integer SV */
301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	391	SV *sv_result;
302	{
303	errno = req->errorno;
304		392
305	ENTER;	393	ENTER;
306	SAVETMPS;	394	SAVETMPS;
307	PUSHMARK (SP);	395	PUSHMARK (SP);
308	EXTEND (SP, 1);	396	EXTEND (SP, 1);
309		397
		398	/* do not recreate the result IV from scratch each time */
		399	if (expect_true (sv_result_cache))
		400	{
		401	sv_result = sv_result_cache; sv_result_cache = 0;
		402	SvIV_set (sv_result, req->result);
		403	SvIOK_only (sv_result);
		404	}
		405	else
		406	{
		407	sv_result = newSViv (req->result);
		408	SvREADONLY_on (sv_result);
		409	}
		410
310	switch (req->type)	411	switch (req->type)
311	{	412	{
		413	case EIO_WD_OPEN:
		414	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		415	break;
		416
312	case REQ_READDIR:	417	case EIO_READDIR:
313	{	418	{
314	SV *rv = &PL_sv_undef;	419	SV *rv = &PL_sv_undef;
315		420
316	if (req->result >= 0)	421	if (req->result >= 0)
317	{	422	{
		423	int i;
318	char *buf = req->data2ptr;	424	char *names = (char *)req->ptr2;
		425	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
319	AV *av = newAV ();	426	AV *av = newAV ();
320		427
321	while (req->result)	428	av_extend (av, req->result - 1);
		429
		430	for (i = 0; i < req->result; ++i)
322	{	431	{
		432	if (req->int1 & EIO_READDIR_DENTS)
		433	{
		434	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		435
		436	if (req->int1 & EIO_READDIR_CUSTOM2)
		437	{
		438	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		439	AV *avent = newAV ();
		440
		441	av_extend (avent, 2);
		442
		443	if (!sv_type [ent->type])
		444	{
		445	sv_type [ent->type] = newSViv (ent->type);
		446	SvREADONLY_on (sv_type [ent->type]);
		447	}
		448
		449	av_store (avent, 0, namesv);
		450	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		451	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		452
		453	av_store (av, i, newRV_noinc ((SV *)avent));
		454	}
		455	else
		456	av_store (av, i, namesv);
		457
		458	++ent;
		459	}
		460	else
		461	{
323	SV *sv = newSVpv (buf, 0);	462	SV *name = newSVpv (names, 0);
324
325	av_push (av, sv);	463	av_store (av, i, name);
326	buf += SvCUR (sv) + 1;	464	names += SvCUR (name) + 1;
327	req->result--;	465	}
328	}	466	}
329		467
330	rv = sv_2mortal (newRV_noinc ((SV *)av));	468	rv = sv_2mortal (newRV_noinc ((SV *)av));
331	}	469	}
332		470
333	PUSHs (rv);	471	PUSHs (rv);
		472
		473	if (req->int1 & EIO_READDIR_CUSTOM1)
		474	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
334	}	475	}
335	break;	476	break;
336		477
337	case REQ_OPEN:	478	case EIO_OPEN:
338	{	479	{
339	/* convert fd to fh */	480	/* convert fd to fh */
340	SV *fh;	481	SV *fh = &PL_sv_undef;
341		482
342	PUSHs (sv_2mortal (newSViv (req->result)));	483	if (req->result >= 0)
343	PUTBACK;	484	{
344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	485	GV *gv = (GV *)sv_newmortal ();
345	SPAGAIN;	486	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		487	char sym [64];
		488	int symlen;
		489
		490	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		491	gv_init (gv, aio_stash, sym, symlen, 0);
346		492
347	fh = SvREFCNT_inc (POPs);	493	symlen = snprintf (
		494	sym,
		495	sizeof (sym),
		496	"%s&=%d",
		497	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		498	(int)req->result
		499	);
348		500
		501	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		502	fh = (SV *)gv;
		503	}
		504
349	PUSHMARK (SP);	505	PUSHs (fh);
350	XPUSHs (sv_2mortal (fh));
351	}	506	}
352	break;	507	break;
353		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
354	case REQ_GROUP:	546	case EIO_GROUP:
355	req->fd = 2; /* mark group as finished */	547	req->int1 = 2; /* mark group as finished */
356		548
357	if (req->data)	549	if (req->sv1)
358	{	550	{
359	int i;	551	int i;
360	AV *av = (AV *)req->data;	552	AV *av = (AV *)req->sv1;
361		553
362	EXTEND (SP, AvFILL (av) + 1);	554	EXTEND (SP, AvFILL (av) + 1);
363	for (i = 0; i <= AvFILL (av); ++i)	555	for (i = 0; i <= AvFILL (av); ++i)
364	PUSHs (*av_fetch (av, i, 0));	556	PUSHs (*av_fetch (av, i, 0));
365	}	557	}
366	break;	558	break;
367		559
368	case REQ_NOP:	560	case EIO_NOP:
369	case REQ_BUSY:	561	case EIO_BUSY:
370	break;	562	break;
371		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
372	default:	641	default:
373	PUSHs (sv_2mortal (newSViv (req->result)));	642	PUSHs (sv_result);
374	break;	643	break;
375	}	644	}
376		645
		646	errno = req->errorno;
377		647
378	PUTBACK;	648	PUTBACK;
379	call_sv (req->callback, G_VOID | G_EVAL);	649	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
380	SPAGAIN;	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;
381		656
382	FREETMPS;	657	FREETMPS;
383	LEAVE;	658	LEAVE;
		659
		660	PUTBACK;
384	}	661	}
385		662
386	if (req->grp)	663	return !!SvTRUE (ERRSV);
387	{
388	aio_req grp = req->grp;
389
390	/* unlink request */
391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
393
394	if (grp->grp_first == req)
395	grp->grp_first = req->grp_next;
396
397	aio_grp_dec (grp);
398	}
399
400	if (SvTRUE (ERRSV))
401	{
402	req_free (req);
403	croak (0);
404	}
405	}	664	}
406		665
407	static void req_free (aio_req req)	666	static void
		667	req_destroy (aio_req req)
408	{	668	{
409	if (req->self)	669	if (req->self)
410	{	670	{
411	sv_unmagic (req->self, PERL_MAGIC_ext);	671	sv_unmagic (req->self, PERL_MAGIC_ext);
412	SvREFCNT_dec (req->self);	672	SvREFCNT_dec (req->self);
413	}	673	}
414		674
415	SvREFCNT_dec (req->data);
416	SvREFCNT_dec (req->fh);	675	SvREFCNT_dec (req->sv1);
417	SvREFCNT_dec (req->fh2);	676	SvREFCNT_dec (req->sv2);
		677	SvREFCNT_dec (req->sv3);
		678	SvREFCNT_dec (req->sv4);
418	SvREFCNT_dec (req->callback);	679	SvREFCNT_dec (req->callback);
419	Safefree (req->statdata);
420		680
421	if (req->type == REQ_READDIR && req->result >= 0)
422	free (req->data2ptr);
423
424	Safefree (req);	681	free (req);
425	}	682	}
426		683
427	static void req_cancel (aio_req req)	684	static void
		685	req_cancel_subs (aio_req grp)
428	{	686	{
429	req->flags |= FLAG_CANCELLED;
430
431	if (req->type == REQ_GROUP)	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 ())
432	{	707	{
433	aio_req sub;	708	int size;
434		709
435	for (sub = req->grp_first; sub; sub = sub->grp_next)	710	X_LOCK (reslock);
436	req_cancel (sub);	711	size = res_queue.size;
		712	X_UNLOCK (reslock);
		713
		714	if (size)
		715	return;
		716
		717	etp_maybe_start_thread ();
		718
		719	s_epipe_wait (&respipe);
437	}	720	}
438	}	721	}
439		722
440	static int poll_cb ()	723	static int
		724	poll_cb (void)
441	{	725	{
442	dSP;
443	int count = 0;
444	int do_croak = 0;
445	aio_req req;
446
447	for (;;)	726	for (;;)
448	{	727	{
449	pthread_mutex_lock (&reslock);	728	int res = eio_poll ();
450	req = reqq_shift (&res_queue);
451		729
452	if (req)	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	# define PROT_NONE 0
		759	# define PROT_WRITE 0
		760	# define MAP_PRIVATE 0
		761	# define MAP_SHARED 0
		762	# define MAP_FIXED 0
		763	#endif
		764
		765	#define MMAP_MAGIC PERL_MAGIC_ext
		766
		767	static int ecb_cold
		768	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		769	{
		770	int old_errno = errno;
		771	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		772	errno = old_errno;
		773
		774	mg->mg_obj = 0; /* just in case */
		775
		776	SvREADONLY_off (sv);
		777
		778	if (SvPVX (sv) != mg->mg_ptr)
		779	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		780
		781	SvCUR_set (sv, 0);
		782	SvPVX (sv) = 0;
		783	SvOK_off (sv);
		784
		785	return 0;
		786	}
		787
		788	static MGVTBL mmap_vtbl = {
		789	0, 0, 0, 0, mmap_free
		790	};
		791
		792	/*****************************************************************************/
		793
		794	static SV *
		795	get_cb (SV *cb_sv)
		796	{
		797	SvGETMAGIC (cb_sv);
		798	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		799	}
		800
		801	static aio_req ecb_noinline
		802	dreq (SV *callback)
		803	{
		804	SV *cb_cv;
		805	aio_req req;
		806	int req_pri = next_pri;
		807	next_pri = EIO_PRI_DEFAULT;
		808
		809	cb_cv = get_cb (callback);
		810
		811	req = calloc (sizeof (*req), 1);
		812	if (!req)
		813	croak ("out of memory during eio_req allocation");
		814
		815	req->callback = SvREFCNT_inc (cb_cv);
		816	req->pri = req_pri;
		817
		818	return req;
		819	}
		820
		821	#define dREQ \
		822	aio_req req = dreq (callback); \
		823
		824	#define REQ_SEND \
		825	PUTBACK; \
		826	req_submit (req); \
		827	SPAGAIN; \
		828	\
		829	if (GIMME_V != G_VOID) \
		830	XPUSHs (req_sv (req, aio_req_stash));
		831
		832	ecb_inline void
		833	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		834	{
		835	if (expect_false (SvROK (path)))
		836	{
		837	SV *rv = SvRV (path);
		838	SV *wdob;
		839
		840	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
453	{	841	{
454	if (!res_queue.size)	842	path = AvARRAY (rv)[1];
		843	wdob = AvARRAY (rv)[0];
		844
		845	if (SvOK (wdob))
455	{	846	{
456	/* read any signals sent by the worker threads */	847	*wd = SvAIO_WD (wdob);
457	char buf [32];	848	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
458	while (read (respipe [0], buf, 32) == 32)
459	;
460	}	849	}
		850	else
		851	*wd = EIO_INVALID_WD;
461	}	852	}
462		853	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
463	pthread_mutex_unlock (&reslock);
464
465	if (!req)
466	break;
467
468	--nreqs;
469
470	if (req->type == REQ_QUIT)
471	started--;
472	else if (req->type == REQ_GROUP && req->length)
473	{	854	{
474	req->fd = 1; /* mark request as delayed */	855	*wd = (aio_wd)(long)SvIVX (rv);
475	continue;	856	*wdsv = SvREFCNT_inc_NN (rv);
		857	*ptr = ".";
		858	return; /* path set to "." */
476	}	859	}
477	else	860	else
478	{	861	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
479	if (req->type == REQ_READ)
480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
481
482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
483	SvREADONLY_off (req->data);
484
485	if (req->statdata)
486	{
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;
489	PL_statcache = *(req->statdata);
490	}
491
492	req_invoke (req);
493
494	count++;
495	}
496
497	req_free (req);
498	}	862	}
499		863
500	return count;	864	*pathsv = newSVsv (path);
		865	*ptr = SvPVbyte_nolen (*pathsv);
501	}	866	}
502		867
503	static void *aio_proc(void *arg);	868	static void ecb_noinline
504		869	req_set_path1 (aio_req req, SV *path)
505	static void start_thread (void)
506	{	870	{
507	sigset_t fullsigset, oldsigset;	871	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
508	pthread_t tid;
509	pthread_attr_t attr;
510
511	pthread_attr_init (&attr);
512	pthread_attr_setstacksize (&attr, STACKSIZE);
513	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
514
515	sigfillset (&fullsigset);
516	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
517
518	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
519	started++;
520
521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
522	}	872	}
523		873
524	static void req_send (aio_req req)	874	static void ecb_noinline
		875	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
525	{	876	{
526	while (started < wanted && nreqs >= started)	877	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
527	start_thread ();
528		878
529	++nreqs;	879	switch (SvTYPE (rv))
530
531	pthread_mutex_lock (&reqlock);
532	reqq_push (&req_queue, req);
533	pthread_cond_signal (&reqwait);
534	pthread_mutex_unlock (&reqlock);
535
536	if (nreqs > max_outstanding)
537	for (;;)
538	{
539	poll_cb ();
540
541	if (nreqs <= max_outstanding)
542	break;
543
544	poll_wait ();
545	}
546	}
547
548	static void end_thread (void)
549	{
550	aio_req req;
551
552	Newz (0, req, 1, aio_cb);
553
554	req->type = REQ_QUIT;
555	req->pri = PRI_MAX + PRI_BIAS;
556
557	req_send (req);
558	}
559
560	static void min_parallel (int nthreads)
561	{
562	if (wanted < nthreads)
563	wanted = nthreads;
564	}
565
566	static void max_parallel (int nthreads)
567	{
568	int cur = started;
569
570	if (wanted > nthreads)
571	wanted = nthreads;
572
573	while (cur > wanted)
574	{	880	{
575	end_thread ();	881	case SVt_PVIO:
576	cur--;	882	case SVt_PVLV:
		883	case SVt_PVGV:
		884	req->type = type_fh;
		885	req->sv1 = newSVsv (fh_or_path);
		886	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		887	break;
		888
		889	default:
		890	req->type = type_path;
		891	req_set_path1 (req, fh_or_path);
		892	break;
577	}	893	}
578
579	while (started > wanted)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584	}	894	}
585		895
586	static void create_pipe ()	896	XS(boot_IO__AIO) ecb_cold;
587	{
588	if (pipe (respipe))
589	croak ("unable to initialize result pipe");
590		897
591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	898	MODULE = IO::AIO PACKAGE = IO::AIO
592	croak ("cannot set result pipe to nonblocking mode");
593		899
594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	900	PROTOTYPES: ENABLE
595	croak ("cannot set result pipe to nonblocking mode");
596	}
597		901
598	/*****************************************************************************/	902	BOOT:
599	/* work around various missing functions */
600
601	#if !HAVE_PREADWRITE
602	# define pread aio_pread
603	# define pwrite aio_pwrite
604
605	/*
606	* make our pread/pwrite safe against themselves, but not against
607	* normal read/write by using a mutex. slows down execution a lot,
608	* but that's your problem, not mine.
609	*/
610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
611
612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
613	{	903	{
614	ssize_t res;	904	static const struct {
615	off_t ooffset;	905	const char *name;
		906	IV iv;
		907	} *civ, const_iv[] = {
		908	# define const_niv(name, value) { # name, (IV) value },
		909	# define const_iv(name) { # name, (IV) name },
		910	# define const_eio(name) { # name, (IV) EIO_ ## name },
616		911
617	pthread_mutex_lock (&preadwritelock);	912	/* you have to re-run ./gendef0 after adding/Removing any constants here */
618	ooffset = lseek (fd, 0, SEEK_CUR);
619	lseek (fd, offset, SEEK_SET);
620	res = read (fd, buf, count);
621	lseek (fd, ooffset, SEEK_SET);
622	pthread_mutex_unlock (&preadwritelock);
623		913
624	return res;	914	const_iv (ENOSYS)
625	}	915	const_iv (EXDEV)
		916	const_iv (EBADR)
626		917
627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	918	const_iv (O_RDONLY)
628	{	919	const_iv (O_WRONLY)
629	ssize_t res;	920	const_iv (O_RDWR)
630	off_t ooffset;	921	const_iv (O_CREAT)
		922	const_iv (O_TRUNC)
		923	const_iv (O_EXCL)
		924	const_iv (O_APPEND)
631		925
632	pthread_mutex_lock (&preadwritelock);	926	const_iv (O_ASYNC)
633	ooffset = lseek (fd, 0, SEEK_CUR);	927	const_iv (O_DIRECT)
634	lseek (fd, offset, SEEK_SET);	928	const_iv (O_NOATIME)
635	res = write (fd, buf, count);
636	lseek (fd, offset, SEEK_SET);
637	pthread_mutex_unlock (&preadwritelock);
638		929
639	return res;	930	const_iv (O_CLOEXEC)
640	}	931	const_iv (O_NOCTTY)
641	#endif	932	const_iv (O_NOFOLLOW)
		933	const_iv (O_NONBLOCK)
		934	const_iv (O_EXEC)
		935	const_iv (O_SEARCH)
		936	const_iv (O_DIRECTORY)
		937	const_iv (O_DSYNC)
		938	const_iv (O_RSYNC)
		939	const_iv (O_SYNC)
		940	const_iv (O_TTY_INIT)
642		941
643	#if !HAVE_FDATASYNC	942	const_iv (S_IFIFO)
644	# define fdatasync fsync	943	const_iv (S_IFCHR)
645	#endif	944	const_iv (S_IFBLK)
		945	const_iv (S_IFLNK)
		946	const_iv (S_IFREG)
		947	const_iv (S_IFDIR)
		948	const_iv (S_IFWHT)
		949	const_iv (S_IFSOCK)
		950	const_iv (S_IFMT)
646		951
647	#if !HAVE_READAHEAD	952	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
648	# define readahead aio_readahead	953	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		954	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		955	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		956	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		957	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
649		958
650	static ssize_t readahead (int fd, off_t offset, size_t count)	959	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
651	{	960	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
652	dBUF;	961	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		962	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		963	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
653		964
654	while (count > 0)	965	const_iv (ST_RDONLY)
655	{	966	const_iv (ST_NOSUID)
656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	967	const_iv (ST_NODEV)
		968	const_iv (ST_NOEXEC)
		969	const_iv (ST_SYNCHRONOUS)
		970	const_iv (ST_MANDLOCK)
		971	const_iv (ST_WRITE)
		972	const_iv (ST_APPEND)
		973	const_iv (ST_IMMUTABLE)
		974	const_iv (ST_NOATIME)
		975	const_iv (ST_NODIRATIME)
		976	const_iv (ST_RELATIME)
657		977
658	pread (fd, aio_buf, len, offset);	978	const_iv (PROT_NONE)
659	offset += len;	979	const_iv (PROT_EXEC)
660	count -= len;	980	const_iv (PROT_READ)
661	}	981	const_iv (PROT_WRITE)
662		982
663	fBUF;	983	/*const_iv (MAP_FIXED)*/
		984	const_iv (MAP_PRIVATE)
		985	const_iv (MAP_SHARED)
		986	const_iv (MAP_ANONYMOUS)
664		987
665	errno = 0;	988	/* linuxish */
666	}	989	const_iv (MAP_HUGETLB)
667	#endif	990	const_iv (MAP_LOCKED)
		991	const_iv (MAP_NORESERVE)
		992	const_iv (MAP_POPULATE)
		993	const_iv (MAP_NONBLOCK)
668		994
669	#if !HAVE_READDIR_R	995	const_iv (FIEMAP_FLAG_SYNC)
670	# define readdir_r aio_readdir_r	996	const_iv (FIEMAP_FLAG_XATTR)
		997	const_iv (FIEMAP_FLAGS_COMPAT)
		998	const_iv (FIEMAP_EXTENT_LAST)
		999	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1000	const_iv (FIEMAP_EXTENT_DELALLOC)
		1001	const_iv (FIEMAP_EXTENT_ENCODED)
		1002	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1003	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1004	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1005	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1006	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1007	const_iv (FIEMAP_EXTENT_MERGED)
		1008	const_iv (FIEMAP_EXTENT_SHARED)
671		1009
672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1010	const_iv (SPLICE_F_MOVE)
673		1011	const_iv (SPLICE_F_NONBLOCK)
674	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	1012	const_iv (SPLICE_F_MORE)
675	{	1013	const_iv (SPLICE_F_GIFT)
676	struct dirent *e;
677	int errorno;
678		1014
679	pthread_mutex_lock (&readdirlock);	1015	const_iv (SEEK_DATA)
		1016	const_iv (SEEK_HOLE)
680		1017
681	e = readdir (dirp);	1018	/* libeio constants */
682	errorno = errno;	1019	const_eio (SEEK_SET)
		1020	const_eio (SEEK_CUR)
		1021	const_eio (SEEK_END)
683		1022
684	if (e)	1023	const_eio (MCL_FUTURE)
685	{	1024	const_eio (MCL_CURRENT)
686	*res = ent;
687	strcpy (ent->d_name, e->d_name);
688	}
689	else
690	*res = 0;
691		1025
692	pthread_mutex_unlock (&readdirlock);	1026	const_eio (MS_ASYNC)
		1027	const_eio (MS_INVALIDATE)
		1028	const_eio (MS_SYNC)
693		1029
694	errno = errorno;	1030	const_eio (MT_MODIFY)
695	return e ? 0 : -1;
696	}
697	#endif
698		1031
699	/* sendfile always needs emulation */	1032	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	1033	const_eio (SYNC_FILE_RANGE_WRITE)
701	{	1034	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
702	ssize_t res;
703		1035
704	if (!count)	1036	const_eio (FALLOC_FL_KEEP_SIZE)
705	return 0;	1037	const_eio (FALLOC_FL_PUNCH_HOLE)
706		1038
707	#if HAVE_SENDFILE	1039	const_eio (READDIR_DENTS)
708	# if __linux	1040	const_eio (READDIR_DIRS_FIRST)
709	res = sendfile (ofd, ifd, &offset, count);	1041	const_eio (READDIR_STAT_ORDER)
		1042	const_eio (READDIR_FOUND_UNKNOWN)
710		1043
711	# elif __freebsd	1044	const_eio (DT_UNKNOWN)
712	/*	1045	const_eio (DT_FIFO)
713	* Of course, the freebsd sendfile is a dire hack with no thoughts	1046	const_eio (DT_CHR)
714	* wasted on making it similar to other I/O functions.	1047	const_eio (DT_DIR)
715	*/	1048	const_eio (DT_BLK)
716	{	1049	const_eio (DT_REG)
717	off_t sbytes;	1050	const_eio (DT_LNK)
718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1051	const_eio (DT_SOCK)
719		1052	const_eio (DT_WHT)
720	if (res < 0 && sbytes)
721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
722	res = sbytes;
723	}	1053	};
724		1054
725	# elif __hpux	1055	aio_stash = gv_stashpv ("IO::AIO" , 1);
726	res = sendfile (ofd, ifd, offset, count, 0, 0);	1056	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1057	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1058	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
727		1059
728	# elif __solaris	1060	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
729	{	1061	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
730	struct sendfilevec vec;
731	size_t sbytes;
732		1062
733	vec.sfv_fd = ifd;	1063	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
734	vec.sfv_flag = 0;
735	vec.sfv_off = offset;
736	vec.sfv_len = count;
737		1064
738	res = sendfilev (ofd, &vec, 1, &sbytes);	1065	reinit ();
		1066	}
739		1067
740	if (res < 0 && sbytes)	1068	void
		1069	reinit ()
		1070	PROTOTYPE:
		1071
		1072	void
		1073	max_poll_reqs (unsigned int nreqs)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_max_poll_reqs (nreqs);
		1077
		1078	void
		1079	max_poll_time (double nseconds)
		1080	PROTOTYPE: $
		1081	CODE:
		1082	eio_set_max_poll_time (nseconds);
		1083
		1084	void
		1085	min_parallel (unsigned int nthreads)
		1086	PROTOTYPE: $
		1087	CODE:
		1088	eio_set_min_parallel (nthreads);
		1089
		1090	void
		1091	max_parallel (unsigned int nthreads)
		1092	PROTOTYPE: $
		1093	CODE:
		1094	eio_set_max_parallel (nthreads);
		1095
		1096	void
		1097	max_idle (unsigned int nthreads)
		1098	PROTOTYPE: $
		1099	CODE:
		1100	eio_set_max_idle (nthreads);
		1101
		1102	void
		1103	idle_timeout (unsigned int seconds)
		1104	PROTOTYPE: $
		1105	CODE:
		1106	eio_set_idle_timeout (seconds);
		1107
		1108	void
		1109	max_outstanding (unsigned int maxreqs)
		1110	PROTOTYPE: $
		1111	CODE:
		1112	max_outstanding = maxreqs;
		1113
		1114	void
		1115	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->type = EIO_WD_OPEN;
		1121	req_set_path1 (req, pathname);
		1122
		1123	REQ_SEND;
		1124	}
		1125
		1126	void
		1127	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1128	PPCODE:
		1129	{
		1130	dREQ;
		1131
		1132	req->type = EIO_OPEN;
		1133	req_set_path1 (req, pathname);
		1134	req->int1 = flags;
		1135	req->int2 = mode;
		1136
		1137	REQ_SEND;
		1138	}
		1139
		1140	void
		1141	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1142	ALIAS:
		1143	aio_fsync = EIO_FSYNC
		1144	aio_fdatasync = EIO_FDATASYNC
		1145	aio_syncfs = EIO_SYNCFS
		1146	PPCODE:
		1147	{
		1148	int fd = s_fileno_croak (fh, 0);
		1149	dREQ;
		1150
		1151	req->type = ix;
		1152	req->sv1 = newSVsv (fh);
		1153	req->int1 = fd;
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	int fd = s_fileno_croak (fh, 0);
		1163	dREQ;
		1164
		1165	req->type = EIO_SYNC_FILE_RANGE;
		1166	req->sv1 = newSVsv (fh);
		1167	req->int1 = fd;
		1168	req->offs = offset;
741	res = sbytes;	1169	req->size = nbytes;
742	}	1170	req->int2 = flags;
743		1171
744	# endif	1172	REQ_SEND;
		1173	}
		1174
		1175	void
		1176	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1177	PPCODE:
		1178	{
		1179	int fd = s_fileno_croak (fh, 0);
		1180	dREQ;
		1181
		1182	req->type = EIO_FALLOCATE;
		1183	req->sv1 = newSVsv (fh);
		1184	req->int1 = fd;
		1185	req->int2 = mode;
		1186	req->offs = offset;
		1187	req->size = len;
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
		1193	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1194	PPCODE:
		1195	{
		1196	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1197	int fd = s_fileno_croak (fh, 0);
		1198	dREQ;
		1199
		1200	if (expect_false (close_fd < 0))
		1201	{
		1202	int pipefd [2];
		1203
		1204	if (
		1205	#ifdef _WIN32
		1206	_pipe (pipefd, 1, _O_BINARY) < 0
745	#else	1207	#else
746	res = -1;	1208	pipe (pipefd) < 0
747	errno = ENOSYS;	1209	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
748	#endif	1210	#endif
749		1211	|| close (pipefd [1]) < 0
750	if (res < 0
751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
752	#if __solaris
753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
754	#endif
755	)
756	)
757	{
758	/* emulate sendfile. this is a major pain in the ass */
759	dBUF;
760
761	res = 0;
762
763	while (count)
764	{
765	ssize_t cnt;
766
767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
768
769	if (cnt <= 0)
770	{	1212	)
771	if (cnt && !res) res = -1;	1213	abort (); /*D*/
772	break;
773	}
774		1214
775	cnt = write (ofd, aio_buf, cnt);	1215	close_fd = pipefd [0];
776
777	if (cnt <= 0)
778	{
779	if (cnt && !res) res = -1;
780	break;
781	}
782
783	offset += cnt;
784	res += cnt;
785	count -= cnt;
786	}
787
788	fBUF;
789	}
790
791	return res;
792	}
793
794	/* read a full directory */
795	static int scandir_ (const char *path, void **namesp)
796	{
797	DIR *dirp;
798	union
799	{
800	struct dirent d;
801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
802	} *u;
803	struct dirent *entp;
804	char *name, *names;
805	int memlen = 4096;
806	int memofs = 0;
807	int res = 0;
808	int errorno;
809
810	dirp = opendir (path);
811	if (!dirp)
812	return -1;
813
814	u = malloc (sizeof (*u));
815	names = malloc (memlen);
816
817	if (u && names)
818	for (;;)
819	{
820	errno = 0;
821	readdir_r (dirp, &u->d, &entp);
822
823	if (!entp)
824	break;
825
826	name = entp->d_name;
827
828	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
829	{
830	int len = strlen (name) + 1;
831
832	res++;
833
834	while (memofs + len > memlen)
835	{
836	memlen *= 2;
837	names = realloc (names, memlen);
838	if (!names)
839	break;
840	}
841
842	memcpy (names + memofs, name, len);
843	memofs += len;
844	}	1216	}
845	}
846		1217
847	errorno = errno;	1218	req->type = EIO_DUP2;
848	free (u);	1219	req->int1 = close_fd;
849	closedir (dirp);	1220	req->sv2 = newSVsv (fh);
		1221	req->int2 = fd;
850		1222
851	if (errorno)	1223	REQ_SEND;
852	{
853	free (names);
854	errno = errorno;
855	res = -1;
856	}
857
858	*namesp = (void *)names;
859	return res;
860	}	1224	}
861		1225
862	/*****************************************************************************/
863
864	static void *aio_proc (void *thr_arg)
865	{
866	aio_req req;
867	int type;
868
869	do
870	{
871	pthread_mutex_lock (&reqlock);
872
873	for (;;)
874	{
875	req = reqq_shift (&req_queue);
876
877	if (req)
878	break;
879
880	pthread_cond_wait (&reqwait, &reqlock);
881	}
882
883	pthread_mutex_unlock (&reqlock);
884
885	errno = 0; /* strictly unnecessary */
886	type = req->type; /* remember type for QUIT check */
887
888	if (!(req->flags & FLAG_CANCELLED))
889	switch (type)
890	{
891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
893
894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
896
897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
900
901	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
902	case REQ_CLOSE: req->result = close (req->fd); break;
903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
904	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
905	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
906	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
908
909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
910	case REQ_FSYNC: req->result = fsync (req->fd); break;
911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
912
913	case REQ_BUSY:
914	{
915	struct timeval tv;
916
917	tv.tv_sec = req->fd;
918	tv.tv_usec = req->fd2;
919
920	req->result = select (0, 0, 0, 0, &tv);
921	}
922
923	case REQ_GROUP:
924	case REQ_NOP:
925	case REQ_QUIT:
926	break;
927
928	default:
929	req->result = ENOSYS;
930	break;
931	}
932
933	req->errorno = errno;
934
935	pthread_mutex_lock (&reslock);
936
937	if (!reqq_push (&res_queue, req))
938	/* write a dummy byte to the pipe so fh becomes ready */
939	write (respipe [1], &respipe, 1);
940
941	pthread_mutex_unlock (&reslock);
942	}
943	while (type != REQ_QUIT);
944
945	return 0;
946	}
947
948	/*****************************************************************************/
949
950	static void atfork_prepare (void)
951	{
952	pthread_mutex_lock (&reqlock);
953	pthread_mutex_lock (&reslock);
954	#if !HAVE_PREADWRITE
955	pthread_mutex_lock (&preadwritelock);
956	#endif
957	#if !HAVE_READDIR_R
958	pthread_mutex_lock (&readdirlock);
959	#endif
960	}
961
962	static void atfork_parent (void)
963	{
964	#if !HAVE_READDIR_R
965	pthread_mutex_unlock (&readdirlock);
966	#endif
967	#if !HAVE_PREADWRITE
968	pthread_mutex_unlock (&preadwritelock);
969	#endif
970	pthread_mutex_unlock (&reslock);
971	pthread_mutex_unlock (&reqlock);
972	}
973
974	static void atfork_child (void)
975	{
976	aio_req prv;
977
978	started = 0;
979
980	while (prv = reqq_shift (&req_queue))
981	req_free (prv);
982
983	while (prv = reqq_shift (&res_queue))
984	req_free (prv);
985
986	close (respipe [0]);
987	close (respipe [1]);
988	create_pipe ();
989
990	atfork_parent ();
991	}
992
993	#define dREQ \
994	aio_req req; \
995	int req_pri = next_pri; \
996	next_pri = DEFAULT_PRI + PRI_BIAS; \
997	\
998	if (SvOK (callback) && !SvROK (callback)) \
999	croak ("callback must be undef or of reference type"); \
1000	\
1001	Newz (0, req, 1, aio_cb); \
1002	if (!req) \
1003	croak ("out of memory during aio_req allocation"); \
1004	\
1005	req->callback = newSVsv (callback); \
1006	req->pri = req_pri
1007
1008	#define REQ_SEND \
1009	req_send (req); \
1010	\
1011	if (GIMME_V != G_VOID) \
1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1013
1014	MODULE = IO::AIO PACKAGE = IO::AIO
1015
1016	PROTOTYPES: ENABLE
1017
1018	BOOT:
1019	{
1020	HV *stash = gv_stashpv ("IO::AIO", 1);
1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1024
1025	create_pipe ();
1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1027	}
1028
1029	void	1226	void
1030	min_parallel (nthreads)	1227	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1031	int nthreads
1032	PROTOTYPE: $
1033
1034	void
1035	max_parallel (nthreads)
1036	int nthreads
1037	PROTOTYPE: $
1038
1039	int
1040	max_outstanding (nreqs)
1041	int nreqs
1042	PROTOTYPE: $
1043	CODE:	1228	PPCODE:
1044	RETVAL = max_outstanding;
1045	max_outstanding = nreqs;
1046
1047	void
1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1049	SV * pathname
1050	int flags
1051	int mode
1052	SV * callback
1053	PROTOTYPE: $$$;$
1054	PPCODE:
1055	{	1229	{
		1230	int fd = s_fileno_croak (fh, 0);
1056	dREQ;	1231	dREQ;
1057		1232
1058	req->type = REQ_OPEN;	1233	req->type = EIO_SEEK;
1059	req->data = newSVsv (pathname);	1234	req->sv1 = newSVsv (fh);
1060	req->dataptr = SvPVbyte_nolen (req->data);	1235	req->int1 = fd;
1061	req->fd = flags;	1236	req->offs = SvVAL64 (offset);
1062	req->mode = mode;	1237	req->int2 = whence;
1063		1238
1064	REQ_SEND;	1239	REQ_SEND;
1065	}	1240	}
1066		1241
1067	void	1242	void
1068	aio_close (fh,callback=&PL_sv_undef)	1243	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1069	SV * fh
1070	SV * callback
1071	PROTOTYPE: $;$
1072	ALIAS:	1244	ALIAS:
1073	aio_close = REQ_CLOSE
1074	aio_fsync = REQ_FSYNC
1075	aio_fdatasync = REQ_FDATASYNC
1076	PPCODE:
1077	{
1078	dREQ;
1079
1080	req->type = ix;
1081	req->fh = newSVsv (fh);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1083
1084	REQ_SEND (req);
1085	}
1086
1087	void
1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1089	SV * fh
1090	UV offset
1091	UV length
1092	SV * data
1093	UV dataoffset
1094	SV * callback
1095	ALIAS:
1096	aio_read = REQ_READ	1245	aio_read = EIO_READ
1097	aio_write = REQ_WRITE	1246	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:	1247	PPCODE:
1100	{	1248	{
1101	aio_req req;
1102	STRLEN svlen;	1249	STRLEN svlen;
		1250	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1103	char *svptr = SvPVbyte (data, svlen);	1251	char *svptr = SvPVbyte (data, svlen);
1104		1252	UV len = SvUV (length);
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107		1253
1108	if (dataoffset < 0)	1254	if (dataoffset < 0)
1109	dataoffset += svlen;	1255	dataoffset += svlen;
1110		1256
1111	if (dataoffset < 0 || dataoffset > svlen)	1257	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("data offset outside of string");	1258	croak ("dataoffset outside of data scalar");
1113		1259
1114	if (ix == REQ_WRITE)	1260	if (ix == EIO_WRITE)
1115	{	1261	{
1116	/* write: check length and adjust. */	1262	/* write: check length and adjust. */
1117	if (length < 0 || length + dataoffset > svlen)	1263	if (!SvOK (length) || len + dataoffset > svlen)
1118	length = svlen - dataoffset;	1264	len = svlen - dataoffset;
1119	}	1265	}
1120	else	1266	else
1121	{	1267	{
1122	/* read: grow scalar as necessary */	1268	/* read: check type and grow scalar as necessary */
		1269	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1123	svptr = SvGROW (data, length + dataoffset);	1270	svptr = sv_grow (data, len + dataoffset + 1);
		1271	else if (SvCUR (data) < len + dataoffset)
		1272	croak ("length + dataoffset outside of scalar, and cannot grow");
1124	}	1273	}
1125
1126	if (length < 0)
1127	croak ("length must not be negative");
1128		1274
1129	{	1275	{
1130	dREQ;	1276	dREQ;
1131		1277
1132	req->type = ix;	1278	req->type = ix;
1133	req->fh = newSVsv (fh);	1279	req->sv1 = newSVsv (fh);
1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1280	req->int1 = fd;
1135	: IoOFP (sv_2io (fh)));	1281	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1136	req->offset = offset;	1282	req->size = len;
1137	req->length = length;
1138	req->data = SvREFCNT_inc (data);	1283	req->sv2 = SvREFCNT_inc (data);
1139	req->dataptr = (char *)svptr + dataoffset;	1284	req->ptr2 = (char *)svptr + dataoffset;
		1285	req->stroffset = dataoffset;
1140		1286
1141	if (!SvREADONLY (data))	1287	if (!SvREADONLY (data))
1142	{	1288	{
1143	SvREADONLY_on (data);	1289	SvREADONLY_on (data);
1144	req->data2ptr = (void *)data;	1290	req->flags |= FLAG_SV2_RO_OFF;
1145	}	1291	}
1146		1292
1147	REQ_SEND;	1293	REQ_SEND;
1148	}	1294	}
1149	}	1295	}
1150		1296
1151	void	1297	void
1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1298	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1153	SV * out_fh	1299	ALIAS:
1154	SV * in_fh	1300	aio_readlink = EIO_READLINK
1155	UV in_offset	1301	aio_realpath = EIO_REALPATH
1156	UV length
1157	SV * callback
1158	PROTOTYPE: $$$$;$
1159	PPCODE:	1302	PPCODE:
1160	{	1303	{
		1304	dREQ;
		1305
		1306	req->type = ix;
		1307	req_set_path1 (req, pathname);
		1308
		1309	REQ_SEND;
		1310	}
		1311
		1312	void
		1313	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1314	PPCODE:
		1315	{
		1316	int ifd = s_fileno_croak (in_fh , 0);
		1317	int ofd = s_fileno_croak (out_fh, 1);
1161	dREQ;	1318	dREQ;
1162		1319
1163	req->type = REQ_SENDFILE;	1320	req->type = EIO_SENDFILE;
1164	req->fh = newSVsv (out_fh);	1321	req->sv1 = newSVsv (out_fh);
1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1322	req->int1 = ofd;
1166	req->fh2 = newSVsv (in_fh);	1323	req->sv2 = newSVsv (in_fh);
1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1324	req->int2 = ifd;
1168	req->offset = in_offset;	1325	req->offs = in_offset;
1169	req->length = length;	1326	req->size = length;
1170		1327
1171	REQ_SEND;	1328	REQ_SEND;
1172	}	1329	}
1173		1330
1174	void	1331	void
1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1332	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	IV length
1179	SV * callback
1180	PROTOTYPE: $$$;$
1181	PPCODE:	1333	PPCODE:
1182	{	1334	{
		1335	int fd = s_fileno_croak (fh, 0);
1183	dREQ;	1336	dREQ;
1184		1337
1185	req->type = REQ_READAHEAD;	1338	req->type = EIO_READAHEAD;
1186	req->fh = newSVsv (fh);	1339	req->sv1 = newSVsv (fh);
1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1340	req->int1 = fd;
1188	req->offset = offset;	1341	req->offs = offset;
1189	req->length = length;	1342	req->size = length;
1190		1343
1191	REQ_SEND;	1344	REQ_SEND;
1192	}	1345	}
1193		1346
1194	void	1347	void
1195	aio_stat (fh_or_path,callback=&PL_sv_undef)	1348	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1196	SV * fh_or_path
1197	SV * callback
1198	ALIAS:	1349	ALIAS:
1199	aio_stat = REQ_STAT	1350	aio_stat = EIO_STAT
1200	aio_lstat = REQ_LSTAT	1351	aio_lstat = EIO_LSTAT
		1352	aio_statvfs = EIO_STATVFS
1201	PPCODE:	1353	PPCODE:
1202	{	1354	{
1203	dREQ;	1355	dREQ;
1204		1356
1205	New (0, req->statdata, 1, Stat_t);	1357	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1206	if (!req->statdata)
1207	{
1208	req_free (req);
1209	croak ("out of memory during aio_req->statdata allocation");
1210	}
1211
1212	if (SvPOK (fh_or_path))
1213	{
1214	req->type = ix;
1215	req->data = newSVsv (fh_or_path);
1216	req->dataptr = SvPVbyte_nolen (req->data);
1217	}
1218	else
1219	{
1220	req->type = REQ_FSTAT;
1221	req->fh = newSVsv (fh_or_path);
1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1223	}
1224		1358
1225	REQ_SEND;	1359	REQ_SEND;
1226	}	1360	}
1227		1361
		1362	UV
		1363	major (UV dev)
		1364	ALIAS:
		1365	minor = 1
		1366	CODE:
		1367	RETVAL = ix ? major (dev) : minor (dev);
		1368	OUTPUT:
		1369	RETVAL
		1370
		1371	UV
		1372	makedev (UV maj, UV min)
		1373	CODE:
		1374	RETVAL = makedev (maj, min);
		1375	OUTPUT:
		1376	RETVAL
		1377
1228	void	1378	void
		1379	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1380	PPCODE:
		1381	{
		1382	dREQ;
		1383
		1384	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1385	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1386	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1387
		1388	REQ_SEND;
		1389	}
		1390
		1391	void
		1392	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1393	PPCODE:
		1394	{
		1395	dREQ;
		1396
		1397	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1398	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1399
		1400	REQ_SEND;
		1401	}
		1402
		1403	void
		1404	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1405	PPCODE:
		1406	{
		1407	dREQ;
		1408
		1409	req->int2 = mode;
		1410	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1411
		1412	REQ_SEND;
		1413	}
		1414
		1415	void
		1416	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1417	PPCODE:
		1418	{
		1419	dREQ;
		1420
		1421	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1422	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1423	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1424
		1425	REQ_SEND;
		1426	}
		1427
		1428	void
		1429	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1430	PPCODE:
		1431	{
		1432	dREQ;
		1433
		1434	req->type = EIO_READDIR;
		1435	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1436
		1437	if (flags & EIO_READDIR_DENTS)
		1438	req->int1 |= EIO_READDIR_CUSTOM2;
		1439
		1440	req_set_path1 (req, pathname);
		1441
		1442	REQ_SEND;
		1443	}
		1444
		1445	void
		1446	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1447	PPCODE:
		1448	{
		1449	dREQ;
		1450
		1451	req->type = EIO_MKDIR;
		1452	req->int2 = mode;
		1453	req_set_path1 (req, pathname);
		1454
		1455	REQ_SEND;
		1456	}
		1457
		1458	void
1229	aio_unlink (pathname,callback=&PL_sv_undef)	1459	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1230	SV * pathname
1231	SV * callback
1232	ALIAS:	1460	ALIAS:
1233	aio_unlink = REQ_UNLINK	1461	aio_unlink = EIO_UNLINK
1234	aio_rmdir = REQ_RMDIR	1462	aio_rmdir = EIO_RMDIR
1235	aio_readdir = REQ_READDIR	1463	aio_readdir = EIO_READDIR
1236	PPCODE:	1464	PPCODE:
1237	{	1465	{
1238	dREQ;	1466	dREQ;
1239		1467
1240	req->type = ix;	1468	req->type = ix;
1241	req->data = newSVsv (pathname);	1469	req_set_path1 (req, pathname);
1242	req->dataptr = SvPVbyte_nolen (req->data);	1470
1243
1244	REQ_SEND;	1471	REQ_SEND;
1245	}	1472	}
1246		1473
1247	void	1474	void
1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1475	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1249	SV * oldpath
1250	SV * newpath
1251	SV * callback
1252	ALIAS:	1476	ALIAS:
1253	aio_link = REQ_LINK	1477	aio_link = EIO_LINK
1254	aio_symlink = REQ_SYMLINK	1478	aio_symlink = EIO_SYMLINK
1255	aio_rename = REQ_RENAME	1479	aio_rename = EIO_RENAME
1256	PPCODE:	1480	PPCODE:
1257	{	1481	{
		1482	eio_wd wd2 = 0;
1258	dREQ;	1483	dREQ;
1259		1484
1260	req->type = ix;	1485	req->type = ix;
1261	req->fh = newSVsv (oldpath);	1486	req_set_path1 (req, oldpath);
1262	req->data2ptr = SvPVbyte_nolen (req->fh);	1487	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1263	req->data = newSVsv (newpath);	1488	req->int3 = (long)wd2;
1264	req->dataptr = SvPVbyte_nolen (req->data);
1265		1489
1266	REQ_SEND;	1490	REQ_SEND;
1267	}	1491	}
1268		1492
1269	void	1493	void
1270	aio_busy (delay,callback=&PL_sv_undef)	1494	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1271	double delay
1272	SV * callback
1273	PPCODE:	1495	PPCODE:
1274	{	1496	{
1275	dREQ;	1497	dREQ;
1276		1498
1277	req->type = REQ_BUSY;	1499	req->type = EIO_MKNOD;
1278	req->fd = delay < 0. ? 0 : delay;	1500	req->int2 = (mode_t)mode;
1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1501	req->offs = dev;
1280		1502	req_set_path1 (req, pathname);
		1503
1281	REQ_SEND;	1504	REQ_SEND;
1282	}	1505	}
1283		1506
1284	void	1507	void
1285	aio_group (callback=&PL_sv_undef)	1508	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1286	SV * callback	1509	ALIAS:
1287	PROTOTYPE: ;$	1510	aio_mtouch = EIO_MTOUCH
		1511	aio_msync = EIO_MSYNC
1288	PPCODE:	1512	PPCODE:
1289	{	1513	{
		1514	STRLEN svlen;
		1515	char *svptr = SvPVbyte (data, svlen);
		1516	UV len = SvUV (length);
		1517
		1518	if (offset < 0)
		1519	offset += svlen;
		1520
		1521	if (offset < 0 || offset > svlen)
		1522	croak ("offset outside of scalar");
		1523
		1524	if (!SvOK (length) || len + offset > svlen)
		1525	len = svlen - offset;
		1526
		1527	{
		1528	dREQ;
		1529
		1530	req->type = ix;
		1531	req->sv2 = SvREFCNT_inc (data);
		1532	req->ptr2 = (char *)svptr + offset;
		1533	req->size = len;
		1534	req->int1 = flags;
		1535
		1536	REQ_SEND;
		1537	}
		1538	}
		1539
		1540	void
		1541	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1542	PPCODE:
		1543	{
		1544	STRLEN svlen;
		1545	char *svptr = SvPVbyte (data, svlen);
		1546	UV len = SvUV (length);
		1547
		1548	if (offset < 0)
		1549	offset += svlen;
		1550
		1551	if (offset < 0 || offset > svlen)
		1552	croak ("offset outside of scalar");
		1553
		1554	if (!SvOK (length) || len + offset > svlen)
		1555	len = svlen - offset;
		1556
		1557	{
		1558	dREQ;
		1559
		1560	req->type = EIO_MLOCK;
		1561	req->sv2 = SvREFCNT_inc (data);
		1562	req->ptr2 = (char *)svptr + offset;
		1563	req->size = len;
		1564
		1565	REQ_SEND;
		1566	}
		1567	}
		1568
		1569	void
		1570	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1571	PPCODE:
		1572	{
		1573	dREQ;
		1574
		1575	req->type = EIO_MLOCKALL;
		1576	req->int1 = flags;
		1577
		1578	REQ_SEND;
		1579	}
		1580
		1581	void
		1582	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1583	PPCODE:
		1584	{
		1585	int fd = s_fileno_croak (fh, 0);
1290	dREQ;	1586	dREQ;
1291		1587
1292	req->type = REQ_GROUP;	1588	req->type = EIO_CUSTOM;
1293	req_send (req);	1589	req->sv1 = newSVsv (fh);
		1590	req->int1 = fd;
1294		1591
1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1592	req->feed = fiemap;
1296	}	1593	#if HAVE_FIEMAP
		1594	/* keep our fingers crossed that the next two types are 64 bit */
		1595	req->offs = start;
		1596	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1597	req->int2 = flags;
		1598	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1599	#endif
1297		1600
		1601	REQ_SEND;
		1602	}
		1603
1298	void	1604	void
1299	aio_nop (callback=&PL_sv_undef)	1605	aio_busy (double delay, SV *callback=&PL_sv_undef)
1300	SV * callback
1301	PPCODE:	1606	PPCODE:
1302	{	1607	{
1303	dREQ;	1608	dREQ;
1304		1609
1305	req->type = REQ_NOP;	1610	req->type = EIO_BUSY;
		1611	req->nv1 = delay < 0. ? 0. : delay;
1306		1612
1307	REQ_SEND;	1613	REQ_SEND;
1308	}	1614	}
1309		1615
1310	void	1616	void
1311	aioreq_pri (int pri = DEFAULT_PRI)	1617	aio_group (SV *callback=&PL_sv_undef)
1312	CODE:	1618	PPCODE:
		1619	{
		1620	dREQ;
		1621
		1622	req->type = EIO_GROUP;
		1623
		1624	PUTBACK;
		1625	req_submit (req);
		1626	SPAGAIN;
		1627
		1628	XPUSHs (req_sv (req, aio_grp_stash));
		1629	}
		1630
		1631	void
		1632	aio_nop (SV *callback=&PL_sv_undef)
		1633	ALIAS:
		1634	aio_nop = EIO_NOP
		1635	aio_sync = EIO_SYNC
		1636	PPCODE:
		1637	{
		1638	dREQ;
		1639
		1640	req->type = ix;
		1641
		1642	REQ_SEND;
		1643	}
		1644
		1645	int
		1646	aioreq_pri (int pri = 0)
		1647	CODE:
		1648	RETVAL = next_pri;
		1649	if (items > 0)
		1650	{
1313	if (pri < PRI_MIN) pri = PRI_MIN;	1651	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1314	if (pri > PRI_MAX) pri = PRI_MAX;	1652	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1315	next_pri = pri + PRI_BIAS;	1653	next_pri = pri;
		1654	}
		1655	OUTPUT:
		1656	RETVAL
1316		1657
1317	void	1658	void
1318	aioreq_nice (int nice = 0)	1659	aioreq_nice (int nice = 0)
1319	CODE:	1660	CODE:
1320	nice = next_pri - nice;	1661	nice = next_pri - nice;
1321	if (nice < PRI_MIN) nice = PRI_MIN;	1662	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1322	if (nice > PRI_MAX) nice = PRI_MAX;	1663	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1323	next_pri = nice + PRI_BIAS;	1664	next_pri = nice;
1324		1665
1325	void	1666	void
1326	flush ()	1667	flush ()
1327	PROTOTYPE:
1328	CODE:	1668	CODE:
1329	while (nreqs)	1669	while (eio_nreqs ())
1330	{	1670	{
1331	poll_wait ();	1671	poll_wait ();
1332	poll_cb ();	1672	poll_cb ();
1333	}	1673	}
1334		1674
1335	void	1675	int
1336	poll()	1676	poll ()
1337	PROTOTYPE:
1338	CODE:	1677	CODE:
1339	if (nreqs)
1340	{
1341	poll_wait ();	1678	poll_wait ();
1342	poll_cb ();	1679	RETVAL = poll_cb ();
1343	}
1344
1345	int
1346	poll_fileno()
1347	PROTOTYPE:
1348	CODE:
1349	RETVAL = respipe [0];
1350	OUTPUT:	1680	OUTPUT:
1351	RETVAL	1681	RETVAL
1352		1682
1353	int	1683	int
		1684	poll_fileno ()
		1685	CODE:
		1686	RETVAL = s_epipe_fd (&respipe);
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	int
1354	poll_cb(...)	1691	poll_cb (...)
1355	PROTOTYPE:	1692	PROTOTYPE:
1356	CODE:	1693	CODE:
1357	RETVAL = poll_cb ();	1694	RETVAL = poll_cb ();
1358	OUTPUT:	1695	OUTPUT:
1359	RETVAL	1696	RETVAL
1360		1697
1361	void	1698	void
1362	poll_wait()	1699	poll_wait ()
1363	PROTOTYPE:
1364	CODE:	1700	CODE:
1365	if (nreqs)
1366	poll_wait ();	1701	poll_wait ();
1367		1702
1368	int	1703	int
1369	nreqs()	1704	nreqs ()
1370	PROTOTYPE:
1371	CODE:	1705	CODE:
1372	RETVAL = nreqs;	1706	RETVAL = eio_nreqs ();
1373	OUTPUT:	1707	OUTPUT:
1374	RETVAL	1708	RETVAL
1375		1709
		1710	int
		1711	nready ()
		1712	CODE:
		1713	RETVAL = eio_nready ();
		1714	OUTPUT:
		1715	RETVAL
		1716
		1717	int
		1718	npending ()
		1719	CODE:
		1720	RETVAL = eio_npending ();
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	nthreads ()
		1726	CODE:
		1727	RETVAL = eio_nthreads ();
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	int
		1732	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1733	CODE:
		1734	RETVAL = posix_fadvise (fh, offset, length, advice);
		1735	OUTPUT:
		1736	RETVAL
		1737
		1738	IV
		1739	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1740	CODE:
		1741	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1747	PPCODE:
		1748	sv_unmagic (scalar, MMAP_MAGIC);
		1749	{
		1750	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1751	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1752	if (addr == (void *)-1)
		1753	XSRETURN_NO;
		1754
		1755	sv_force_normal (scalar);
		1756
		1757	/* we store the length in mg_obj, as namlen is I32 :/ */
		1758	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1759	->mg_obj = (SV *)length;
		1760
		1761	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1762
		1763	if (!(prot & PROT_WRITE))
		1764	SvREADONLY_on (scalar);
		1765
		1766	if (SvLEN (scalar))
		1767	Safefree (SvPVX (scalar));
		1768
		1769	SvPVX (scalar) = (char *)addr;
		1770	SvCUR_set (scalar, length);
		1771	SvLEN_set (scalar, 0);
		1772	SvPOK_only (scalar);
		1773
		1774	XSRETURN_YES;
		1775	}
		1776
		1777	void
		1778	munmap (SV *scalar)
		1779	CODE:
		1780	sv_unmagic (scalar, MMAP_MAGIC);
		1781
		1782	int
		1783	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1784	ALIAS:
		1785	mprotect = 1
		1786	CODE:
		1787	{
		1788	STRLEN svlen;
		1789	void *addr = SvPVbyte (scalar, svlen);
		1790	STRLEN len = SvUV (length);
		1791
		1792	if (offset < 0)
		1793	offset += svlen;
		1794
		1795	if (offset < 0 || offset > svlen)
		1796	croak ("offset outside of scalar");
		1797
		1798	if (!SvOK (length) || len + offset > svlen)
		1799	len = svlen - offset;
		1800
		1801	addr = (void *)(((intptr_t)addr) + offset);
		1802	eio_page_align (&addr, &len);
		1803
		1804	switch (ix)
		1805	{
		1806	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1807	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1808	}
		1809	}
		1810	OUTPUT:
		1811	RETVAL
		1812
		1813	int
		1814	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1815	CODE:
		1816	{
		1817	STRLEN svlen;
		1818	void *addr = SvPVbyte (scalar, svlen);
		1819	size_t len = SvUV (length);
		1820
		1821	if (offset < 0)
		1822	offset += svlen;
		1823
		1824	if (offset < 0 || offset > svlen)
		1825	croak ("offset outside of scalar");
		1826
		1827	if (!SvOK (length) || len + offset > svlen)
		1828	len = svlen - offset;
		1829
		1830	addr = (void *)(((intptr_t)addr) + offset);
		1831	eio_page_align (&addr, &len);
		1832	#if _POSIX_MEMLOCK_RANGE
		1833	RETVAL = munlock (addr, len);
		1834	#else
		1835	RETVAL = EIO_ENOSYS ();
		1836	#endif
		1837	}
		1838	OUTPUT:
		1839	RETVAL
		1840
		1841	int
		1842	munlockall ()
		1843	CODE:
		1844	#if _POSIX_MEMLOCK
		1845	munlockall ();
		1846	#else
		1847	RETVAL = EIO_ENOSYS ();
		1848	#endif
		1849	OUTPUT:
		1850	RETVAL
		1851
		1852	int
		1853	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1854	CODE:
		1855	{
		1856	#if HAVE_LINUX_SPLICE
		1857	loff_t off_in_, off_out_;
		1858	RETVAL = splice (
		1859	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1860	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1861	length, flags
		1862	);
		1863	#else
		1864	RETVAL = EIO_ENOSYS ();
		1865	#endif
		1866	}
		1867	OUTPUT:
		1868	RETVAL
		1869
		1870	int
		1871	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1872	CODE:
		1873	#if HAVE_LINUX_SPLICE
		1874	RETVAL = tee (rfh, wfh, length, flags);
		1875	#else
		1876	RETVAL = EIO_ENOSYS ();
		1877	#endif
		1878	OUTPUT:
		1879	RETVAL
		1880
		1881	int
		1882	pipesize (aio_rfd rfh, int new_size = -1)
		1883	PROTOTYPE: $;$
		1884	CODE:
		1885	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1886	if (new_size >= 0)
		1887	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1888	else
		1889	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1890	#else
		1891	errno = ENOSYS;
		1892	RETVAL = -1;
		1893	#endif
		1894	OUTPUT:
		1895	RETVAL
		1896
		1897	void _on_next_submit (SV *cb)
		1898	CODE:
		1899	SvREFCNT_dec (on_next_submit);
		1900	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1901
1376	PROTOTYPES: DISABLE	1902	PROTOTYPES: DISABLE
		1903
		1904	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1905
		1906	BOOT:
		1907	{
		1908	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1909	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1910	}
		1911
		1912	void
		1913	DESTROY (SV *self)
		1914	CODE:
		1915	{
		1916	aio_wd wd = SvAIO_WD (self);
		1917	#if HAVE_AT
		1918	{
		1919	SV *callback = &PL_sv_undef;
		1920	dREQ; /* clobbers next_pri :/ */
		1921	next_pri = req->pri; /* restore next_pri */
		1922	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1923	req->type = EIO_WD_CLOSE;
		1924	req->wd = wd;
		1925	REQ_SEND;
		1926	}
		1927	#else
		1928	eio_wd_close_sync (wd);
		1929	#endif
		1930	}
1377		1931
1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1932	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1379		1933
1380	void	1934	void
1381	cancel (aio_req_ornot req)	1935	cancel (aio_req_ornot req)
1382	CODE:	1936	CODE:
1383	req_cancel (req);	1937	eio_cancel (req);
1384		1938
1385	void	1939	void
1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1940	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1387	CODE:	1941	PPCODE:
		1942	{
		1943	if (GIMME_V != G_VOID)
		1944	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1945
		1946	if (items > 1)
		1947	{
		1948	SV *cb_cv =get_cb (callback);
		1949
1388	SvREFCNT_dec (req->callback);	1950	SvREFCNT_dec (req->callback);
1389	req->callback = newSVsv (callback);	1951	req->callback = SvREFCNT_inc (cb_cv);
		1952	}
		1953	}
1390		1954
1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1955	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1392		1956
1393	void	1957	void
1394	add (aio_req grp, ...)	1958	add (aio_req grp, ...)
1395	PPCODE:	1959	PPCODE:
1396	{	1960	{
1397	int i;	1961	int i;
1398	aio_req req;
1399		1962
1400	if (grp->fd == 2)	1963	if (grp->int1 == 2)
1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1964	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1402		1965
1403	for (i = 1; i < items; ++i )	1966	for (i = 1; i < items; ++i )
1404	{	1967	{
		1968	aio_req req;
		1969
1405	if (GIMME_V != G_VOID)	1970	if (GIMME_V != G_VOID)
1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1971	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1407		1972
1408	req = SvAIO_REQ (ST (i));	1973	req = SvAIO_REQ (ST (i));
1409		1974
1410	if (req)	1975	if (req)
1411	{	1976	eio_grp_add (grp, req);
1412	++grp->length;
1413	req->grp = grp;
1414
1415	req->grp_prev = 0;
1416	req->grp_next = grp->grp_first;
1417
1418	if (grp->grp_first)
1419	grp->grp_first->grp_prev = req;
1420
1421	grp->grp_first = req;
1422	}
1423	}	1977	}
1424	}	1978	}
		1979
		1980	void
		1981	cancel_subs (aio_req_ornot req)
		1982	CODE:
		1983	req_cancel_subs (req);
1425		1984
1426	void	1985	void
1427	result (aio_req grp, ...)	1986	result (aio_req grp, ...)
1428	CODE:	1987	CODE:
1429	{	1988	{
1430	int i;	1989	int i;
		1990	AV *av;
		1991
		1992	grp->errorno = errno;
		1993
1431	AV *av = newAV ();	1994	av = newAV ();
		1995	av_extend (av, items - 1);
1432		1996
1433	for (i = 1; i < items; ++i )	1997	for (i = 1; i < items; ++i )
1434	av_push (av, newSVsv (ST (i)));	1998	av_push (av, newSVsv (ST (i)));
1435		1999
1436	SvREFCNT_dec (grp->data);	2000	SvREFCNT_dec (grp->sv1);
1437	grp->data = (SV *)av;	2001	grp->sv1 = (SV *)av;
1438	}	2002	}
		2003
		2004	void
		2005	errno (aio_req grp, int errorno = errno)
		2006	CODE:
		2007	grp->errorno = errorno;
1439		2008
1440	void	2009	void
1441	limit (aio_req grp, int limit)	2010	limit (aio_req grp, int limit)
1442	CODE:	2011	CODE:
1443	grp->fd2 = limit;	2012	eio_grp_limit (grp, limit);
1444	aio_grp_feed (grp);
1445		2013
1446	void	2014	void
1447	feed (aio_req grp, SV *callback=&PL_sv_undef)	2015	feed (aio_req grp, SV *callback=&PL_sv_undef)
1448	CODE:	2016	CODE:
1449	{	2017	{
1450	SvREFCNT_dec (grp->fh2);	2018	SvREFCNT_dec (grp->sv2);
1451	grp->fh2 = newSVsv (callback);	2019	grp->sv2 = newSVsv (callback);
		2020	grp->feed = aio_grp_feed;
1452		2021
1453	if (grp->fd2 <= 0)	2022	if (grp->int2 <= 0)
1454	grp->fd2 = 2;	2023	grp->int2 = 2;
1455		2024
1456	aio_grp_feed (grp);	2025	eio_grp_limit (grp, grp->int2);
1457	}	2026	}
1458		2027

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