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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 1.234 by root, Thu Jun 25 15:20:11 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 SV *
		345	newmortalFH (int fd, int flags)
		346	{
		347	if (fd < 0)
		348	return &PL_sv_undef;
		349
		350	GV *gv = (GV *)sv_newmortal ();
		351	char sym[64];
		352	int symlen;
		353
		354	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		355	gv_init (gv, aio_stash, sym, symlen, 0);
		356
		357	symlen = snprintf (
		358	sym,
		359	sizeof (sym),
		360	"%s&=%d",
		361	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		362	fd
		363	);
		364
		365	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		366	? (SV *)gv : &PL_sv_undef;
		367	}
		368
		369	static void
226	static void aio_grp_feed (aio_req grp)	370	aio_grp_feed (aio_req grp)
227	{	371	{
228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	372	if (grp->sv2 && SvOK (grp->sv2))
229	{	373	{
230	int old_len = grp->length;
231
232	if (grp->fh2 && SvOK (grp->fh2))
233	{
234	dSP;	374	dSP;
235		375
236	ENTER;	376	ENTER;
237	SAVETMPS;	377	SAVETMPS;
238	PUSHMARK (SP);	378	PUSHMARK (SP);
239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	379	XPUSHs (req_sv (grp, aio_grp_stash));
240	PUTBACK;	380	PUTBACK;
241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	381	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
242	SPAGAIN;	382	SPAGAIN;
243	FREETMPS;	383	FREETMPS;
244	LEAVE;	384	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	}	385	}
255	}	386	}
256		387
257	static void aio_grp_dec (aio_req grp)	388	static void
		389	req_submit (eio_req *req)
258	{	390	{
259	--grp->length;	391	eio_submit (req);
260		392
261	/* call feeder, if applicable */	393	if (expect_false (on_next_submit))
262	aio_grp_feed (grp);
263
264	/* finish, if done */
265	if (!grp->length && grp->fd)
266	{	394	{
267	req_invoke (grp);	395	dSP;
268	req_free (grp);	396	SV *cb = sv_2mortal (on_next_submit);
		397
		398	on_next_submit = 0;
		399
		400	PUSHMARK (SP);
		401	PUTBACK;
		402	call_sv (cb, G_DISCARD | G_EVAL);
269	}	403	}
270	}	404	}
271		405
272	static void poll_wait ()	406	static int
		407	req_invoke (eio_req *req)
273	{	408	{
274	fd_set rfd;	409	if (req->flags & FLAG_SV2_RO_OFF)
		410	SvREADONLY_off (req->sv2);
275		411
276	while (nreqs)	412	if (!EIO_CANCELLED (req) && req->callback)
277	{	413	{
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;	414	dSP;
300		415	static SV *sv_result_cache; /* caches the result integer SV */
301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	416	SV *sv_result;
302	{
303	errno = req->errorno;
304		417
305	ENTER;	418	ENTER;
306	SAVETMPS;	419	SAVETMPS;
307	PUSHMARK (SP);	420	PUSHMARK (SP);
308	EXTEND (SP, 1);	421	EXTEND (SP, 1);
309		422
		423	/* do not recreate the result IV from scratch each time */
		424	if (expect_true (sv_result_cache))
		425	{
		426	sv_result = sv_result_cache; sv_result_cache = 0;
		427	SvIV_set (sv_result, req->result);
		428	SvIOK_only (sv_result);
		429	}
		430	else
		431	{
		432	sv_result = newSViv (req->result);
		433	SvREADONLY_on (sv_result);
		434	}
		435
310	switch (req->type)	436	switch (req->type)
311	{	437	{
		438	case EIO_WD_OPEN:
		439	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		440	break;
		441
312	case REQ_READDIR:	442	case EIO_READDIR:
313	{	443	{
314	SV *rv = &PL_sv_undef;	444	SV *rv = &PL_sv_undef;
315		445
316	if (req->result >= 0)	446	if (req->result >= 0)
317	{	447	{
		448	int i;
318	char *buf = req->data2ptr;	449	char *names = (char *)req->ptr2;
		450	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
319	AV *av = newAV ();	451	AV *av = newAV ();
320		452
321	while (req->result)	453	av_extend (av, req->result - 1);
		454
		455	for (i = 0; i < req->result; ++i)
322	{	456	{
		457	if (req->int1 & EIO_READDIR_DENTS)
		458	{
		459	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		460
		461	if (req->int1 & EIO_READDIR_CUSTOM2)
		462	{
		463	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		464	AV *avent = newAV ();
		465
		466	av_extend (avent, 2);
		467
		468	if (!sv_type [ent->type])
		469	{
		470	sv_type [ent->type] = newSViv (ent->type);
		471	SvREADONLY_on (sv_type [ent->type]);
		472	}
		473
		474	av_store (avent, 0, namesv);
		475	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		476	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		477
		478	av_store (av, i, newRV_noinc ((SV *)avent));
		479	}
		480	else
		481	av_store (av, i, namesv);
		482
		483	++ent;
		484	}
		485	else
		486	{
323	SV *sv = newSVpv (buf, 0);	487	SV *name = newSVpv (names, 0);
324
325	av_push (av, sv);	488	av_store (av, i, name);
326	buf += SvCUR (sv) + 1;	489	names += SvCUR (name) + 1;
327	req->result--;	490	}
328	}	491	}
329		492
330	rv = sv_2mortal (newRV_noinc ((SV *)av));	493	rv = sv_2mortal (newRV_noinc ((SV *)av));
331	}	494	}
332		495
333	PUSHs (rv);	496	PUSHs (rv);
		497
		498	if (req->int1 & EIO_READDIR_CUSTOM1)
		499	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
334	}	500	}
335	break;	501	break;
336		502
337	case REQ_OPEN:	503	case EIO_OPEN:
		504	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		505	break;
		506
		507	case EIO_STATVFS:
		508	case EIO_FSTATVFS:
338	{	509	{
339	/* convert fd to fh */	510	SV *rv = &PL_sv_undef;
340	SV *fh;	511
		512	#ifndef _WIN32
		513	if (req->result >= 0)
		514	{
		515	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		516	HV *hv = newHV ();
		517	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		518	* chooses to make it a struct.
		519	*/
		520	unsigned long fsid = 0;
		521	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
341		522
342	PUSHs (sv_2mortal (newSViv (req->result)));	523	rv = sv_2mortal (newRV_noinc ((SV *)hv));
343	PUTBACK;
344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
345	SPAGAIN;
346		524
347	fh = SvREFCNT_inc (POPs);	525	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		526	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		527	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		528	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		529	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		530	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		531	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		532	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		533	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		534	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		535	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		536	}
		537	#endif
348		538
349	PUSHMARK (SP);	539	PUSHs (rv);
350	XPUSHs (sv_2mortal (fh));
351	}	540	}
		541
352	break;	542	break;
353		543
354	case REQ_GROUP:	544	case EIO_GROUP:
355	req->fd = 2; /* mark group as finished */	545	req->int1 = 2; /* mark group as finished */
356		546
357	if (req->data)	547	if (req->sv1)
358	{	548	{
359	int i;	549	int i;
360	AV *av = (AV *)req->data;	550	AV *av = (AV *)req->sv1;
361		551
362	EXTEND (SP, AvFILL (av) + 1);	552	EXTEND (SP, AvFILL (av) + 1);
363	for (i = 0; i <= AvFILL (av); ++i)	553	for (i = 0; i <= AvFILL (av); ++i)
364	PUSHs (*av_fetch (av, i, 0));	554	PUSHs (*av_fetch (av, i, 0));
365	}	555	}
366	break;	556	break;
367		557
368	case REQ_NOP:	558	case EIO_NOP:
369	case REQ_BUSY:	559	case EIO_BUSY:
370	break;	560	break;
371		561
		562	case EIO_READLINK:
		563	case EIO_REALPATH:
		564	if (req->result > 0)
		565	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		566	break;
		567
		568	case EIO_STAT:
		569	case EIO_LSTAT:
		570	case EIO_FSTAT:
		571	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		572
		573	if (!(PL_laststatval = req->result))
		574	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		575	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		576
		577	PUSHs (sv_result);
		578	break;
		579
		580	case EIO_SEEK:
		581	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		582	break;
		583
		584	case EIO_READ:
		585	{
		586	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		587	*SvEND (req->sv2) = 0;
		588	SvPOK_only (req->sv2);
		589	SvSETMAGIC (req->sv2);
		590	PUSHs (sv_result);
		591	}
		592	break;
		593
		594	case EIO_CUSTOM:
		595	if (req->feed == fiemap)
		596	{
		597	#if HAVE_FIEMAP
		598	if (!req->result)
		599	{
		600	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		601
		602	if (fiemap->fm_extent_count)
		603	{
		604	AV *av = newAV ();
		605	int i;
		606
		607	while (fiemap->fm_mapped_extents)
		608	{
		609	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		610	AV *ext_av = newAV ();
		611
		612	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		613	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		614	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		615	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		616
		617	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		618	}
		619
		620	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		621	}
		622	else
		623	{
		624	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		625	PUSHs (sv_result);
		626	}
		627	}
		628	#endif
		629	}
		630	else
		631	PUSHs (sv_result);
		632	break;
		633
		634	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		635	if (req->result > 0)
		636	SvIV_set (sv_result, 0);
		637	/* FALLTHROUGH */
		638
372	default:	639	default:
373	PUSHs (sv_2mortal (newSViv (req->result)));	640	PUSHs (sv_result);
374	break;	641	break;
375	}	642	}
376		643
		644	errno = req->errorno;
377		645
378	PUTBACK;	646	PUTBACK;
379	call_sv (req->callback, G_VOID | G_EVAL);	647	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
380	SPAGAIN;	648	SPAGAIN;
		649
		650	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		651	SvREFCNT_dec (sv_result);
		652	else
		653	sv_result_cache = sv_result;
381		654
382	FREETMPS;	655	FREETMPS;
383	LEAVE;	656	LEAVE;
		657
		658	PUTBACK;
384	}	659	}
385		660
386	if (req->grp)	661	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	}	662	}
406		663
407	static void req_free (aio_req req)	664	static void
		665	req_destroy (aio_req req)
408	{	666	{
409	if (req->self)	667	if (req->self)
410	{	668	{
411	sv_unmagic (req->self, PERL_MAGIC_ext);	669	sv_unmagic (req->self, PERL_MAGIC_ext);
412	SvREFCNT_dec (req->self);	670	SvREFCNT_dec (req->self);
413	}	671	}
414		672
415	SvREFCNT_dec (req->data);
416	SvREFCNT_dec (req->fh);	673	SvREFCNT_dec (req->sv1);
417	SvREFCNT_dec (req->fh2);	674	SvREFCNT_dec (req->sv2);
		675	SvREFCNT_dec (req->sv3);
		676	SvREFCNT_dec (req->sv4);
418	SvREFCNT_dec (req->callback);	677	SvREFCNT_dec (req->callback);
419	Safefree (req->statdata);
420		678
421	if (req->type == REQ_READDIR && req->result >= 0)
422	free (req->data2ptr);
423
424	Safefree (req);	679	free (req);
425	}	680	}
426		681
427	static void req_cancel (aio_req req)	682	static void
		683	req_cancel_subs (aio_req grp)
428	{	684	{
429	req->flags |= FLAG_CANCELLED;
430
431	if (req->type == REQ_GROUP)	685	if (grp->type != EIO_GROUP)
		686	return;
		687
		688	SvREFCNT_dec (grp->sv2);
		689	grp->sv2 = 0;
		690
		691	eio_grp_cancel (grp);
		692	}
		693
		694	static void ecb_cold
		695	create_respipe (void)
		696	{
		697	if (s_epipe_renew (&respipe))
		698	croak ("IO::AIO: unable to initialize result pipe");
		699	}
		700
		701	static void
		702	poll_wait (void)
		703	{
		704	while (eio_nreqs ())
432	{	705	{
433	aio_req sub;	706	int size;
434		707
435	for (sub = req->grp_first; sub; sub = sub->grp_next)	708	X_LOCK (reslock);
436	req_cancel (sub);	709	size = res_queue.size;
		710	X_UNLOCK (reslock);
		711
		712	if (size)
		713	return;
		714
		715	etp_maybe_start_thread ();
		716
		717	s_epipe_wait (&respipe);
437	}	718	}
438	}	719	}
439		720
440	static int poll_cb ()	721	static int
		722	poll_cb (void)
441	{	723	{
442	dSP;
443	int count = 0;
444	int do_croak = 0;
445	aio_req req;
446
447	for (;;)	724	for (;;)
448	{	725	{
449	pthread_mutex_lock (&reslock);	726	int res = eio_poll ();
450	req = reqq_shift (&res_queue);
451		727
452	if (req)	728	if (res > 0)
		729	croak (0);
		730
		731	if (!max_outstanding || max_outstanding > eio_nreqs ())
		732	return res;
		733
		734	poll_wait ();
		735	}
		736	}
		737
		738	static void ecb_cold
		739	reinit (void)
		740	{
		741	create_respipe ();
		742
		743	if (eio_init (want_poll, done_poll) < 0)
		744	croak ("IO::AIO: unable to initialise eio library");
		745	}
		746
		747	/*****************************************************************************/
		748
		749	#if !_POSIX_MAPPED_FILES
		750	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		751	# define munmap(addr,length) EIO_ENOSYS ()
		752	#endif
		753
		754	#if !_POSIX_MEMORY_PROTECTION
		755	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		756	# define PROT_NONE 0
		757	# define PROT_WRITE 0
		758	# define MAP_PRIVATE 0
		759	# define MAP_SHARED 0
		760	# define MAP_FIXED 0
		761	#endif
		762
		763	#define MMAP_MAGIC PERL_MAGIC_ext
		764
		765	static int ecb_cold
		766	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		767	{
		768	int old_errno = errno;
		769	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		770	errno = old_errno;
		771
		772	mg->mg_obj = 0; /* just in case */
		773
		774	SvREADONLY_off (sv);
		775
		776	if (SvPVX (sv) != mg->mg_ptr)
		777	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		778
		779	SvCUR_set (sv, 0);
		780	SvPVX (sv) = 0;
		781	SvOK_off (sv);
		782
		783	return 0;
		784	}
		785
		786	static MGVTBL mmap_vtbl = {
		787	0, 0, 0, 0, mmap_free
		788	};
		789
		790	/*****************************************************************************/
		791
		792	static SV *
		793	get_cb (SV *cb_sv)
		794	{
		795	SvGETMAGIC (cb_sv);
		796	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		797	}
		798
		799	static aio_req ecb_noinline
		800	dreq (SV *callback)
		801	{
		802	SV *cb_cv;
		803	aio_req req;
		804	int req_pri = next_pri;
		805	next_pri = EIO_PRI_DEFAULT;
		806
		807	cb_cv = get_cb (callback);
		808
		809	req = calloc (sizeof (*req), 1);
		810	if (!req)
		811	croak ("out of memory during eio_req allocation");
		812
		813	req->callback = SvREFCNT_inc (cb_cv);
		814	req->pri = req_pri;
		815
		816	return req;
		817	}
		818
		819	#define dREQ \
		820	aio_req req = dreq (callback); \
		821
		822	#define REQ_SEND \
		823	PUTBACK; \
		824	req_submit (req); \
		825	SPAGAIN; \
		826	\
		827	if (GIMME_V != G_VOID) \
		828	XPUSHs (req_sv (req, aio_req_stash));
		829
		830	ecb_inline void
		831	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		832	{
		833	if (expect_false (SvROK (path)))
		834	{
		835	SV *rv = SvRV (path);
		836	SV *wdob;
		837
		838	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
453	{	839	{
454	if (!res_queue.size)	840	path = AvARRAY (rv)[1];
		841	wdob = AvARRAY (rv)[0];
		842
		843	if (SvOK (wdob))
455	{	844	{
456	/* read any signals sent by the worker threads */	845	*wd = SvAIO_WD (wdob);
457	char buf [32];	846	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
458	while (read (respipe [0], buf, 32) == 32)
459	;
460	}	847	}
		848	else
		849	*wd = EIO_INVALID_WD;
461	}	850	}
462		851	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	{	852	{
474	req->fd = 1; /* mark request as delayed */	853	*wd = (aio_wd)(long)SvIVX (rv);
475	continue;	854	*wdsv = SvREFCNT_inc_NN (rv);
		855	*ptr = ".";
		856	return; /* path set to "." */
476	}	857	}
477	else	858	else
478	{	859	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	}	860	}
499		861
500	return count;	862	*pathsv = newSVsv (path);
		863	*ptr = SvPVbyte_nolen (*pathsv);
501	}	864	}
502		865
503	static void *aio_proc(void *arg);	866	static void ecb_noinline
504		867	req_set_path1 (aio_req req, SV *path)
505	static void start_thread (void)
506	{	868	{
507	sigset_t fullsigset, oldsigset;	869	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	}	870	}
523		871
524	static void req_send (aio_req req)	872	static void ecb_noinline
		873	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
525	{	874	{
526	while (started < wanted && nreqs >= started)	875	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
527	start_thread ();
528		876
529	++nreqs;	877	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	{	878	{
575	end_thread ();	879	case SVt_PVIO:
576	cur--;	880	case SVt_PVLV:
		881	case SVt_PVGV:
		882	req->type = type_fh;
		883	req->sv1 = newSVsv (fh_or_path);
		884	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		885	break;
		886
		887	default:
		888	req->type = type_path;
		889	req_set_path1 (req, fh_or_path);
		890	break;
577	}	891	}
578
579	while (started > wanted)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584	}	892	}
585		893
586	static void create_pipe ()	894	XS(boot_IO__AIO) ecb_cold;
587	{
588	if (pipe (respipe))
589	croak ("unable to initialize result pipe");
590		895
591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	896	MODULE = IO::AIO PACKAGE = IO::AIO
592	croak ("cannot set result pipe to nonblocking mode");
593		897
594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	898	PROTOTYPES: ENABLE
595	croak ("cannot set result pipe to nonblocking mode");
596	}
597		899
598	/*****************************************************************************/	900	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	{	901	{
614	ssize_t res;	902	static const struct {
615	off_t ooffset;	903	const char *name;
		904	IV iv;
		905	} *civ, const_iv[] = {
		906	# define const_niv(name, value) { # name, (IV) value },
		907	# define const_iv(name) { # name, (IV) name },
		908	# define const_eio(name) { # name, (IV) EIO_ ## name },
616		909
617	pthread_mutex_lock (&preadwritelock);	910	/* 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		911
624	return res;	912	const_iv (ENOSYS)
625	}	913	const_iv (EXDEV)
		914	const_iv (EBADR)
626		915
627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	916	const_iv (O_RDONLY)
628	{	917	const_iv (O_WRONLY)
629	ssize_t res;	918	const_iv (O_RDWR)
630	off_t ooffset;	919	const_iv (O_CREAT)
		920	const_iv (O_TRUNC)
		921	const_iv (O_EXCL)
		922	const_iv (O_APPEND)
631		923
632	pthread_mutex_lock (&preadwritelock);	924	const_iv (O_ASYNC)
633	ooffset = lseek (fd, 0, SEEK_CUR);	925	const_iv (O_DIRECT)
634	lseek (fd, offset, SEEK_SET);	926	const_iv (O_NOATIME)
635	res = write (fd, buf, count);
636	lseek (fd, offset, SEEK_SET);
637	pthread_mutex_unlock (&preadwritelock);
638		927
639	return res;	928	const_iv (O_CLOEXEC)
640	}	929	const_iv (O_NOCTTY)
641	#endif	930	const_iv (O_NOFOLLOW)
		931	const_iv (O_NONBLOCK)
		932	const_iv (O_EXEC)
		933	const_iv (O_SEARCH)
		934	const_iv (O_DIRECTORY)
		935	const_iv (O_DSYNC)
		936	const_iv (O_RSYNC)
		937	const_iv (O_SYNC)
		938	const_iv (O_PATH)
		939	const_iv (O_TMPFILE)
		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)
		1038	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1039	const_eio (FALLOC_FL_ZERO_RANGE)
706		1040
707	#if HAVE_SENDFILE	1041	const_eio (READDIR_DENTS)
708	# if __linux	1042	const_eio (READDIR_DIRS_FIRST)
709	res = sendfile (ofd, ifd, &offset, count);	1043	const_eio (READDIR_STAT_ORDER)
		1044	const_eio (READDIR_FOUND_UNKNOWN)
710		1045
711	# elif __freebsd	1046	const_eio (DT_UNKNOWN)
712	/*	1047	const_eio (DT_FIFO)
713	* Of course, the freebsd sendfile is a dire hack with no thoughts	1048	const_eio (DT_CHR)
714	* wasted on making it similar to other I/O functions.	1049	const_eio (DT_DIR)
715	*/	1050	const_eio (DT_BLK)
716	{	1051	const_eio (DT_REG)
717	off_t sbytes;	1052	const_eio (DT_LNK)
718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1053	const_eio (DT_SOCK)
719		1054	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	}	1055	};
724		1056
725	# elif __hpux	1057	aio_stash = gv_stashpv ("IO::AIO" , 1);
726	res = sendfile (ofd, ifd, offset, count, 0, 0);	1058	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1059	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1060	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
727		1061
728	# elif __solaris	1062	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
729	{	1063	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
730	struct sendfilevec vec;
731	size_t sbytes;
732		1064
733	vec.sfv_fd = ifd;	1065	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
734	vec.sfv_flag = 0;
735	vec.sfv_off = offset;
736	vec.sfv_len = count;
737		1066
738	res = sendfilev (ofd, &vec, 1, &sbytes);	1067	reinit ();
		1068	}
739		1069
740	if (res < 0 && sbytes)	1070	void
		1071	reinit ()
		1072	PROTOTYPE:
		1073
		1074	void
		1075	max_poll_reqs (unsigned int nreqs)
		1076	PROTOTYPE: $
		1077	CODE:
		1078	eio_set_max_poll_reqs (nreqs);
		1079
		1080	void
		1081	max_poll_time (double nseconds)
		1082	PROTOTYPE: $
		1083	CODE:
		1084	eio_set_max_poll_time (nseconds);
		1085
		1086	void
		1087	min_parallel (unsigned int nthreads)
		1088	PROTOTYPE: $
		1089	CODE:
		1090	eio_set_min_parallel (nthreads);
		1091
		1092	void
		1093	max_parallel (unsigned int nthreads)
		1094	PROTOTYPE: $
		1095	CODE:
		1096	eio_set_max_parallel (nthreads);
		1097
		1098	void
		1099	max_idle (unsigned int nthreads)
		1100	PROTOTYPE: $
		1101	CODE:
		1102	eio_set_max_idle (nthreads);
		1103
		1104	void
		1105	idle_timeout (unsigned int seconds)
		1106	PROTOTYPE: $
		1107	CODE:
		1108	eio_set_idle_timeout (seconds);
		1109
		1110	void
		1111	max_outstanding (unsigned int maxreqs)
		1112	PROTOTYPE: $
		1113	CODE:
		1114	max_outstanding = maxreqs;
		1115
		1116	void
		1117	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1118	PPCODE:
		1119	{
		1120	dREQ;
		1121
		1122	req->type = EIO_WD_OPEN;
		1123	req_set_path1 (req, pathname);
		1124
		1125	REQ_SEND;
		1126	}
		1127
		1128	void
		1129	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1130	PPCODE:
		1131	{
		1132	dREQ;
		1133
		1134	req->type = EIO_OPEN;
		1135	req_set_path1 (req, pathname);
		1136	req->int1 = flags;
		1137	req->int2 = mode;
		1138
		1139	REQ_SEND;
		1140	}
		1141
		1142	void
		1143	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1144	ALIAS:
		1145	aio_fsync = EIO_FSYNC
		1146	aio_fdatasync = EIO_FDATASYNC
		1147	aio_syncfs = EIO_SYNCFS
		1148	PPCODE:
		1149	{
		1150	int fd = s_fileno_croak (fh, 0);
		1151	dREQ;
		1152
		1153	req->type = ix;
		1154	req->sv1 = newSVsv (fh);
		1155	req->int1 = fd;
		1156
		1157	REQ_SEND;
		1158	}
		1159
		1160	void
		1161	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1162	PPCODE:
		1163	{
		1164	int fd = s_fileno_croak (fh, 0);
		1165	dREQ;
		1166
		1167	req->type = EIO_SYNC_FILE_RANGE;
		1168	req->sv1 = newSVsv (fh);
		1169	req->int1 = fd;
		1170	req->offs = offset;
741	res = sbytes;	1171	req->size = nbytes;
742	}	1172	req->int2 = flags;
743		1173
744	# endif	1174	REQ_SEND;
		1175	}
		1176
		1177	void
		1178	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1179	PPCODE:
		1180	{
		1181	int fd = s_fileno_croak (fh, 0);
		1182	dREQ;
		1183
		1184	req->type = EIO_FALLOCATE;
		1185	req->sv1 = newSVsv (fh);
		1186	req->int1 = fd;
		1187	req->int2 = mode;
		1188	req->offs = offset;
		1189	req->size = len;
		1190
		1191	REQ_SEND;
		1192	}
		1193
		1194	void
		1195	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1196	PPCODE:
		1197	{
		1198	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1199	int fd = s_fileno_croak (fh, 0);
		1200	dREQ;
		1201
		1202	if (expect_false (close_fd < 0))
		1203	{
		1204	int pipefd [2];
		1205
		1206	if (
		1207	#ifdef _WIN32
		1208	_pipe (pipefd, 1, _O_BINARY) < 0
745	#else	1209	#else
746	res = -1;	1210	pipe (pipefd) < 0
747	errno = ENOSYS;	1211	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
748	#endif	1212	#endif
749		1213	|| 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	{	1214	)
771	if (cnt && !res) res = -1;	1215	abort (); /*D*/
772	break;
773	}
774		1216
775	cnt = write (ofd, aio_buf, cnt);	1217	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	}	1218	}
845	}
846		1219
847	errorno = errno;	1220	req->type = EIO_DUP2;
848	free (u);	1221	req->int1 = close_fd;
849	closedir (dirp);	1222	req->sv2 = newSVsv (fh);
		1223	req->int2 = fd;
850		1224
851	if (errorno)	1225	REQ_SEND;
852	{
853	free (names);
854	errno = errorno;
855	res = -1;
856	}
857
858	*namesp = (void *)names;
859	return res;
860	}	1226	}
861		1227
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	1228	void
1030	min_parallel (nthreads)	1229	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:	1230	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: $$$;$
1054	PPCODE:
1055	{	1231	{
		1232	int fd = s_fileno_croak (fh, 0);
1056	dREQ;	1233	dREQ;
1057		1234
1058	req->type = REQ_OPEN;	1235	req->type = EIO_SEEK;
1059	req->data = newSVsv (pathname);	1236	req->sv1 = newSVsv (fh);
1060	req->dataptr = SvPVbyte_nolen (req->data);	1237	req->int1 = fd;
1061	req->fd = flags;	1238	req->offs = SvVAL64 (offset);
1062	req->mode = mode;	1239	req->int2 = whence;
1063		1240
1064	REQ_SEND;	1241	REQ_SEND;
1065	}	1242	}
1066		1243
1067	void	1244	void
1068	aio_close (fh,callback=&PL_sv_undef)	1245	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1069	SV * fh
1070	SV * callback
1071	PROTOTYPE: $;$
1072	ALIAS:	1246	ALIAS:
1073	aio_close = REQ_CLOSE
1074	aio_fsync = REQ_FSYNC
1075	aio_fdatasync = REQ_FDATASYNC
1076	PPCODE:
1077	{
1078	dREQ;
1079
1080	req->type = ix;
1081	req->fh = newSVsv (fh);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1083
1084	REQ_SEND (req);
1085	}
1086
1087	void
1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1089	SV * fh
1090	UV offset
1091	UV length
1092	SV * data
1093	UV dataoffset
1094	SV * callback
1095	ALIAS:
1096	aio_read = REQ_READ	1247	aio_read = EIO_READ
1097	aio_write = REQ_WRITE	1248	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:	1249	PPCODE:
1100	{	1250	{
1101	aio_req req;
1102	STRLEN svlen;	1251	STRLEN svlen;
		1252	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1103	char *svptr = SvPVbyte (data, svlen);	1253	char *svptr = SvPVbyte (data, svlen);
1104		1254	UV len = SvUV (length);
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107		1255
1108	if (dataoffset < 0)	1256	if (dataoffset < 0)
1109	dataoffset += svlen;	1257	dataoffset += svlen;
1110		1258
1111	if (dataoffset < 0 || dataoffset > svlen)	1259	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("data offset outside of string");	1260	croak ("dataoffset outside of data scalar");
1113		1261
1114	if (ix == REQ_WRITE)	1262	if (ix == EIO_WRITE)
1115	{	1263	{
1116	/* write: check length and adjust. */	1264	/* write: check length and adjust. */
1117	if (length < 0 || length + dataoffset > svlen)	1265	if (!SvOK (length) || len + dataoffset > svlen)
1118	length = svlen - dataoffset;	1266	len = svlen - dataoffset;
1119	}	1267	}
1120	else	1268	else
1121	{	1269	{
1122	/* read: grow scalar as necessary */	1270	/* read: check type and grow scalar as necessary */
		1271	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1123	svptr = SvGROW (data, length + dataoffset);	1272	svptr = sv_grow (data, len + dataoffset + 1);
		1273	else if (SvCUR (data) < len + dataoffset)
		1274	croak ("length + dataoffset outside of scalar, and cannot grow");
1124	}	1275	}
1125
1126	if (length < 0)
1127	croak ("length must not be negative");
1128		1276
1129	{	1277	{
1130	dREQ;	1278	dREQ;
1131		1279
1132	req->type = ix;	1280	req->type = ix;
1133	req->fh = newSVsv (fh);	1281	req->sv1 = newSVsv (fh);
1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1282	req->int1 = fd;
1135	: IoOFP (sv_2io (fh)));	1283	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1136	req->offset = offset;	1284	req->size = len;
1137	req->length = length;
1138	req->data = SvREFCNT_inc (data);	1285	req->sv2 = SvREFCNT_inc (data);
1139	req->dataptr = (char *)svptr + dataoffset;	1286	req->ptr2 = (char *)svptr + dataoffset;
		1287	req->stroffset = dataoffset;
1140		1288
1141	if (!SvREADONLY (data))	1289	if (!SvREADONLY (data))
1142	{	1290	{
1143	SvREADONLY_on (data);	1291	SvREADONLY_on (data);
1144	req->data2ptr = (void *)data;	1292	req->flags |= FLAG_SV2_RO_OFF;
1145	}	1293	}
1146		1294
1147	REQ_SEND;	1295	REQ_SEND;
1148	}	1296	}
1149	}	1297	}
1150		1298
1151	void	1299	void
1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1300	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1153	SV * out_fh	1301	ALIAS:
1154	SV * in_fh	1302	aio_readlink = EIO_READLINK
1155	UV in_offset	1303	aio_realpath = EIO_REALPATH
1156	UV length
1157	SV * callback
1158	PROTOTYPE: $$$$;$
1159	PPCODE:	1304	PPCODE:
1160	{	1305	{
		1306	dREQ;
		1307
		1308	req->type = ix;
		1309	req_set_path1 (req, pathname);
		1310
		1311	REQ_SEND;
		1312	}
		1313
		1314	void
		1315	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1316	PPCODE:
		1317	{
		1318	int ifd = s_fileno_croak (in_fh , 0);
		1319	int ofd = s_fileno_croak (out_fh, 1);
1161	dREQ;	1320	dREQ;
1162		1321
1163	req->type = REQ_SENDFILE;	1322	req->type = EIO_SENDFILE;
1164	req->fh = newSVsv (out_fh);	1323	req->sv1 = newSVsv (out_fh);
1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1324	req->int1 = ofd;
1166	req->fh2 = newSVsv (in_fh);	1325	req->sv2 = newSVsv (in_fh);
1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1326	req->int2 = ifd;
1168	req->offset = in_offset;	1327	req->offs = in_offset;
1169	req->length = length;	1328	req->size = length;
1170		1329
1171	REQ_SEND;	1330	REQ_SEND;
1172	}	1331	}
1173		1332
1174	void	1333	void
1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1334	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	IV length
1179	SV * callback
1180	PROTOTYPE: $$$;$
1181	PPCODE:	1335	PPCODE:
1182	{	1336	{
		1337	int fd = s_fileno_croak (fh, 0);
1183	dREQ;	1338	dREQ;
1184		1339
1185	req->type = REQ_READAHEAD;	1340	req->type = EIO_READAHEAD;
1186	req->fh = newSVsv (fh);	1341	req->sv1 = newSVsv (fh);
1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1342	req->int1 = fd;
1188	req->offset = offset;	1343	req->offs = offset;
1189	req->length = length;	1344	req->size = length;
1190		1345
1191	REQ_SEND;	1346	REQ_SEND;
1192	}	1347	}
1193		1348
1194	void	1349	void
1195	aio_stat (fh_or_path,callback=&PL_sv_undef)	1350	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1196	SV * fh_or_path
1197	SV * callback
1198	ALIAS:	1351	ALIAS:
1199	aio_stat = REQ_STAT	1352	aio_stat = EIO_STAT
1200	aio_lstat = REQ_LSTAT	1353	aio_lstat = EIO_LSTAT
		1354	aio_statvfs = EIO_STATVFS
1201	PPCODE:	1355	PPCODE:
1202	{	1356	{
1203	dREQ;	1357	dREQ;
1204		1358
1205	New (0, req->statdata, 1, Stat_t);	1359	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		1360
1225	REQ_SEND;	1361	REQ_SEND;
1226	}	1362	}
1227		1363
		1364	UV
		1365	major (UV dev)
		1366	ALIAS:
		1367	minor = 1
		1368	CODE:
		1369	RETVAL = ix ? major (dev) : minor (dev);
		1370	OUTPUT:
		1371	RETVAL
		1372
		1373	UV
		1374	makedev (UV maj, UV min)
		1375	CODE:
		1376	RETVAL = makedev (maj, min);
		1377	OUTPUT:
		1378	RETVAL
		1379
1228	void	1380	void
		1381	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1387	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1388	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1400	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1401
		1402	REQ_SEND;
		1403	}
		1404
		1405	void
		1406	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1407	PPCODE:
		1408	{
		1409	dREQ;
		1410
		1411	req->int2 = mode;
		1412	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1413
		1414	REQ_SEND;
		1415	}
		1416
		1417	void
		1418	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1419	PPCODE:
		1420	{
		1421	dREQ;
		1422
		1423	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1424	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1425	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1426
		1427	REQ_SEND;
		1428	}
		1429
		1430	void
		1431	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1432	PPCODE:
		1433	{
		1434	dREQ;
		1435
		1436	req->type = EIO_READDIR;
		1437	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1438
		1439	if (flags & EIO_READDIR_DENTS)
		1440	req->int1 |= EIO_READDIR_CUSTOM2;
		1441
		1442	req_set_path1 (req, pathname);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
		1448	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1449	PPCODE:
		1450	{
		1451	dREQ;
		1452
		1453	req->type = EIO_MKDIR;
		1454	req->int2 = mode;
		1455	req_set_path1 (req, pathname);
		1456
		1457	REQ_SEND;
		1458	}
		1459
		1460	void
1229	aio_unlink (pathname,callback=&PL_sv_undef)	1461	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1230	SV * pathname
1231	SV * callback
1232	ALIAS:	1462	ALIAS:
1233	aio_unlink = REQ_UNLINK	1463	aio_unlink = EIO_UNLINK
1234	aio_rmdir = REQ_RMDIR	1464	aio_rmdir = EIO_RMDIR
1235	aio_readdir = REQ_READDIR	1465	aio_readdir = EIO_READDIR
1236	PPCODE:	1466	PPCODE:
1237	{	1467	{
1238	dREQ;	1468	dREQ;
1239		1469
1240	req->type = ix;	1470	req->type = ix;
1241	req->data = newSVsv (pathname);	1471	req_set_path1 (req, pathname);
1242	req->dataptr = SvPVbyte_nolen (req->data);	1472
1243
1244	REQ_SEND;	1473	REQ_SEND;
1245	}	1474	}
1246		1475
1247	void	1476	void
1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1477	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1249	SV * oldpath
1250	SV * newpath
1251	SV * callback
1252	ALIAS:	1478	ALIAS:
1253	aio_link = REQ_LINK	1479	aio_link = EIO_LINK
1254	aio_symlink = REQ_SYMLINK	1480	aio_symlink = EIO_SYMLINK
1255	aio_rename = REQ_RENAME	1481	aio_rename = EIO_RENAME
1256	PPCODE:	1482	PPCODE:
1257	{	1483	{
		1484	eio_wd wd2 = 0;
1258	dREQ;	1485	dREQ;
1259		1486
1260	req->type = ix;	1487	req->type = ix;
1261	req->fh = newSVsv (oldpath);	1488	req_set_path1 (req, oldpath);
1262	req->data2ptr = SvPVbyte_nolen (req->fh);	1489	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1263	req->data = newSVsv (newpath);	1490	req->int3 = (long)wd2;
1264	req->dataptr = SvPVbyte_nolen (req->data);
1265		1491
1266	REQ_SEND;	1492	REQ_SEND;
1267	}	1493	}
1268		1494
1269	void	1495	void
1270	aio_busy (delay,callback=&PL_sv_undef)	1496	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1271	double delay
1272	SV * callback
1273	PPCODE:	1497	PPCODE:
1274	{	1498	{
1275	dREQ;	1499	dREQ;
1276		1500
1277	req->type = REQ_BUSY;	1501	req->type = EIO_MKNOD;
1278	req->fd = delay < 0. ? 0 : delay;	1502	req->int2 = (mode_t)mode;
1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1503	req->offs = dev;
1280		1504	req_set_path1 (req, pathname);
		1505
1281	REQ_SEND;	1506	REQ_SEND;
1282	}	1507	}
1283		1508
1284	void	1509	void
1285	aio_group (callback=&PL_sv_undef)	1510	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback = &PL_sv_undef)
1286	SV * callback	1511	ALIAS:
1287	PROTOTYPE: ;$	1512	aio_mtouch = EIO_MTOUCH
		1513	aio_msync = EIO_MSYNC
1288	PPCODE:	1514	PPCODE:
1289	{	1515	{
		1516	STRLEN svlen;
		1517	char *svptr = SvPVbyte (data, svlen);
		1518	UV len = SvUV (length);
		1519
		1520	if (offset < 0)
		1521	offset += svlen;
		1522
		1523	if (offset < 0 || offset > svlen)
		1524	croak ("offset outside of scalar");
		1525
		1526	if (!SvOK (length) || len + offset > svlen)
		1527	len = svlen - offset;
		1528
		1529	{
		1530	dREQ;
		1531
		1532	req->type = ix;
		1533	req->sv2 = SvREFCNT_inc (data);
		1534	req->ptr2 = (char *)svptr + offset;
		1535	req->size = len;
		1536	req->int1 = flags;
		1537
		1538	REQ_SEND;
		1539	}
		1540	}
		1541
		1542	void
		1543	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1544	PPCODE:
		1545	{
		1546	STRLEN svlen;
		1547	char *svptr = SvPVbyte (data, svlen);
		1548	UV len = SvUV (length);
		1549
		1550	if (offset < 0)
		1551	offset += svlen;
		1552
		1553	if (offset < 0 || offset > svlen)
		1554	croak ("offset outside of scalar");
		1555
		1556	if (!SvOK (length) || len + offset > svlen)
		1557	len = svlen - offset;
		1558
		1559	{
		1560	dREQ;
		1561
		1562	req->type = EIO_MLOCK;
		1563	req->sv2 = SvREFCNT_inc (data);
		1564	req->ptr2 = (char *)svptr + offset;
		1565	req->size = len;
		1566
		1567	REQ_SEND;
		1568	}
		1569	}
		1570
		1571	void
		1572	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1573	PPCODE:
		1574	{
		1575	dREQ;
		1576
		1577	req->type = EIO_MLOCKALL;
		1578	req->int1 = flags;
		1579
		1580	REQ_SEND;
		1581	}
		1582
		1583	void
		1584	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1585	PPCODE:
		1586	{
		1587	int fd = s_fileno_croak (fh, 0);
1290	dREQ;	1588	dREQ;
1291		1589
1292	req->type = REQ_GROUP;	1590	req->type = EIO_CUSTOM;
1293	req_send (req);	1591	req->sv1 = newSVsv (fh);
		1592	req->int1 = fd;
1294		1593
1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1594	req->feed = fiemap;
1296	}	1595	#if HAVE_FIEMAP
		1596	/* keep our fingers crossed that the next two types are 64 bit */
		1597	req->offs = start;
		1598	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1599	req->int2 = flags;
		1600	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1601	#endif
1297		1602
		1603	REQ_SEND;
		1604	}
		1605
1298	void	1606	void
1299	aio_nop (callback=&PL_sv_undef)	1607	aio_busy (double delay, SV *callback = &PL_sv_undef)
1300	SV * callback
1301	PPCODE:	1608	PPCODE:
1302	{	1609	{
1303	dREQ;	1610	dREQ;
1304		1611
1305	req->type = REQ_NOP;	1612	req->type = EIO_BUSY;
		1613	req->nv1 = delay < 0. ? 0. : delay;
1306		1614
1307	REQ_SEND;	1615	REQ_SEND;
1308	}	1616	}
1309		1617
1310	void	1618	void
1311	aioreq_pri (int pri = DEFAULT_PRI)	1619	aio_group (SV *callback = &PL_sv_undef)
1312	CODE:	1620	PPCODE:
		1621	{
		1622	dREQ;
		1623
		1624	req->type = EIO_GROUP;
		1625
		1626	PUTBACK;
		1627	req_submit (req);
		1628	SPAGAIN;
		1629
		1630	XPUSHs (req_sv (req, aio_grp_stash));
		1631	}
		1632
		1633	void
		1634	aio_nop (SV *callback = &PL_sv_undef)
		1635	ALIAS:
		1636	aio_nop = EIO_NOP
		1637	aio_sync = EIO_SYNC
		1638	PPCODE:
		1639	{
		1640	dREQ;
		1641
		1642	req->type = ix;
		1643
		1644	REQ_SEND;
		1645	}
		1646
		1647	int
		1648	aioreq_pri (int pri = NO_INIT)
		1649	CODE:
		1650	RETVAL = next_pri;
		1651	if (items > 0)
		1652	{
1313	if (pri < PRI_MIN) pri = PRI_MIN;	1653	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1314	if (pri > PRI_MAX) pri = PRI_MAX;	1654	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1315	next_pri = pri + PRI_BIAS;	1655	next_pri = pri;
		1656	}
		1657	OUTPUT:
		1658	RETVAL
1316		1659
1317	void	1660	void
1318	aioreq_nice (int nice = 0)	1661	aioreq_nice (int nice = 0)
1319	CODE:	1662	CODE:
1320	nice = next_pri - nice;	1663	nice = next_pri - nice;
1321	if (nice < PRI_MIN) nice = PRI_MIN;	1664	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1322	if (nice > PRI_MAX) nice = PRI_MAX;	1665	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1323	next_pri = nice + PRI_BIAS;	1666	next_pri = nice;
1324		1667
1325	void	1668	void
1326	flush ()	1669	flush ()
1327	PROTOTYPE:
1328	CODE:	1670	CODE:
1329	while (nreqs)	1671	while (eio_nreqs ())
1330	{	1672	{
1331	poll_wait ();	1673	poll_wait ();
1332	poll_cb ();	1674	poll_cb ();
1333	}	1675	}
1334		1676
1335	void	1677	int
1336	poll()	1678	poll ()
1337	PROTOTYPE:
1338	CODE:	1679	CODE:
1339	if (nreqs)
1340	{
1341	poll_wait ();	1680	poll_wait ();
1342	poll_cb ();	1681	RETVAL = poll_cb ();
1343	}
1344
1345	int
1346	poll_fileno()
1347	PROTOTYPE:
1348	CODE:
1349	RETVAL = respipe [0];
1350	OUTPUT:	1682	OUTPUT:
1351	RETVAL	1683	RETVAL
1352		1684
1353	int	1685	int
		1686	poll_fileno ()
		1687	CODE:
		1688	RETVAL = s_epipe_fd (&respipe);
		1689	OUTPUT:
		1690	RETVAL
		1691
		1692	int
1354	poll_cb(...)	1693	poll_cb (...)
1355	PROTOTYPE:	1694	PROTOTYPE:
1356	CODE:	1695	CODE:
1357	RETVAL = poll_cb ();	1696	RETVAL = poll_cb ();
1358	OUTPUT:	1697	OUTPUT:
1359	RETVAL	1698	RETVAL
1360		1699
1361	void	1700	void
1362	poll_wait()	1701	poll_wait ()
1363	PROTOTYPE:
1364	CODE:	1702	CODE:
1365	if (nreqs)
1366	poll_wait ();	1703	poll_wait ();
1367		1704
1368	int	1705	int
1369	nreqs()	1706	nreqs ()
1370	PROTOTYPE:
1371	CODE:	1707	CODE:
1372	RETVAL = nreqs;	1708	RETVAL = eio_nreqs ();
1373	OUTPUT:	1709	OUTPUT:
1374	RETVAL	1710	RETVAL
1375		1711
		1712	int
		1713	nready ()
		1714	CODE:
		1715	RETVAL = eio_nready ();
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	int
		1720	npending ()
		1721	CODE:
		1722	RETVAL = eio_npending ();
		1723	OUTPUT:
		1724	RETVAL
		1725
		1726	int
		1727	nthreads ()
		1728	CODE:
		1729	RETVAL = eio_nthreads ();
		1730	OUTPUT:
		1731	RETVAL
		1732
		1733	int
		1734	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1735	CODE:
		1736	RETVAL = posix_fadvise (fh, offset, length, advice);
		1737	OUTPUT:
		1738	RETVAL
		1739
		1740	IV
		1741	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1742	CODE:
		1743	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1744	OUTPUT:
		1745	RETVAL
		1746
		1747	void
		1748	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1749	PPCODE:
		1750	sv_unmagic (scalar, MMAP_MAGIC);
		1751	{
		1752	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1753	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1754	if (addr == (void *)-1)
		1755	XSRETURN_NO;
		1756
		1757	sv_force_normal (scalar);
		1758
		1759	/* we store the length in mg_obj, as namlen is I32 :/ */
		1760	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1761	->mg_obj = (SV *)length;
		1762
		1763	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1764
		1765	if (!(prot & PROT_WRITE))
		1766	SvREADONLY_on (scalar);
		1767
		1768	if (SvLEN (scalar))
		1769	Safefree (SvPVX (scalar));
		1770
		1771	SvPVX (scalar) = (char *)addr;
		1772	SvCUR_set (scalar, length);
		1773	SvLEN_set (scalar, 0);
		1774	SvPOK_only (scalar);
		1775
		1776	XSRETURN_YES;
		1777	}
		1778
		1779	void
		1780	munmap (SV *scalar)
		1781	CODE:
		1782	sv_unmagic (scalar, MMAP_MAGIC);
		1783
		1784	int
		1785	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1786	ALIAS:
		1787	mprotect = 1
		1788	CODE:
		1789	{
		1790	STRLEN svlen;
		1791	void *addr = SvPVbyte (scalar, svlen);
		1792	STRLEN len = SvUV (length);
		1793
		1794	if (offset < 0)
		1795	offset += svlen;
		1796
		1797	if (offset < 0 || offset > svlen)
		1798	croak ("offset outside of scalar");
		1799
		1800	if (!SvOK (length) || len + offset > svlen)
		1801	len = svlen - offset;
		1802
		1803	addr = (void *)(((intptr_t)addr) + offset);
		1804	eio_page_align (&addr, &len);
		1805
		1806	switch (ix)
		1807	{
		1808	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1809	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1810	}
		1811	}
		1812	OUTPUT:
		1813	RETVAL
		1814
		1815	int
		1816	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1817	CODE:
		1818	{
		1819	STRLEN svlen;
		1820	void *addr = SvPVbyte (scalar, svlen);
		1821	size_t len = SvUV (length);
		1822
		1823	if (offset < 0)
		1824	offset += svlen;
		1825
		1826	if (offset < 0 || offset > svlen)
		1827	croak ("offset outside of scalar");
		1828
		1829	if (!SvOK (length) || len + offset > svlen)
		1830	len = svlen - offset;
		1831
		1832	addr = (void *)(((intptr_t)addr) + offset);
		1833	eio_page_align (&addr, &len);
		1834	#if _POSIX_MEMLOCK_RANGE
		1835	RETVAL = munlock (addr, len);
		1836	#else
		1837	RETVAL = EIO_ENOSYS ();
		1838	#endif
		1839	}
		1840	OUTPUT:
		1841	RETVAL
		1842
		1843	int
		1844	munlockall ()
		1845	CODE:
		1846	#if _POSIX_MEMLOCK
		1847	munlockall ();
		1848	#else
		1849	RETVAL = EIO_ENOSYS ();
		1850	#endif
		1851	OUTPUT:
		1852	RETVAL
		1853
		1854	int
		1855	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1856	CODE:
		1857	{
		1858	#if HAVE_LINUX_SPLICE
		1859	loff_t off_in_, off_out_;
		1860	RETVAL = splice (
		1861	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1862	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1863	length, flags
		1864	);
		1865	#else
		1866	RETVAL = EIO_ENOSYS ();
		1867	#endif
		1868	}
		1869	OUTPUT:
		1870	RETVAL
		1871
		1872	int
		1873	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1874	CODE:
		1875	#if HAVE_LINUX_SPLICE
		1876	RETVAL = tee (rfh, wfh, length, flags);
		1877	#else
		1878	RETVAL = EIO_ENOSYS ();
		1879	#endif
		1880	OUTPUT:
		1881	RETVAL
		1882
		1883	int
		1884	pipesize (aio_rfd rfh, int new_size = -1)
		1885	PROTOTYPE: $;$
		1886	CODE:
		1887	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1888	if (new_size >= 0)
		1889	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1890	else
		1891	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1892	#else
		1893	errno = ENOSYS;
		1894	RETVAL = -1;
		1895	#endif
		1896	OUTPUT:
		1897	RETVAL
		1898
		1899	void
		1900	pipe2 (int flags = 0)
		1901	PROTOTYPE: ;$
		1902	PPCODE:
		1903	{
		1904	int fd[2];
		1905	int res;
		1906
		1907	if (flags)
		1908	#if HAVE_PIPE2
		1909	res = pipe2 (fd, flags);
		1910	#else
		1911	res = (errno = ENOSYS, -1);
		1912	#endif
		1913	else
		1914	res = pipe (fd);
		1915
		1916	if (!res)
		1917	{
		1918	EXTEND (SP, 2);
		1919	PUSHs (newmortalFH (fd[0], O_RDONLY));
		1920	PUSHs (newmortalFH (fd[1], O_WRONLY));
		1921	}
		1922	}
		1923
		1924	void _on_next_submit (SV *cb)
		1925	CODE:
		1926	SvREFCNT_dec (on_next_submit);
		1927	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1928
1376	PROTOTYPES: DISABLE	1929	PROTOTYPES: DISABLE
		1930
		1931	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1932
		1933	BOOT:
		1934	{
		1935	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1936	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1937	}
		1938
		1939	void
		1940	DESTROY (SV *self)
		1941	CODE:
		1942	{
		1943	aio_wd wd = SvAIO_WD (self);
		1944	#if HAVE_AT
		1945	{
		1946	SV *callback = &PL_sv_undef;
		1947	dREQ; /* clobbers next_pri :/ */
		1948	next_pri = req->pri; /* restore next_pri */
		1949	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1950	req->type = EIO_WD_CLOSE;
		1951	req->wd = wd;
		1952	REQ_SEND;
		1953	}
		1954	#else
		1955	eio_wd_close_sync (wd);
		1956	#endif
		1957	}
1377		1958
1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1959	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1379		1960
1380	void	1961	void
1381	cancel (aio_req_ornot req)	1962	cancel (aio_req_ornot req)
1382	CODE:	1963	CODE:
1383	req_cancel (req);	1964	eio_cancel (req);
1384		1965
1385	void	1966	void
1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1967	cb (aio_req_ornot req, SV *callback = NO_INIT)
1387	CODE:	1968	PPCODE:
		1969	{
		1970	if (GIMME_V != G_VOID)
		1971	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1972
		1973	if (items > 1)
		1974	{
		1975	SV *cb_cv = get_cb (callback);
		1976
1388	SvREFCNT_dec (req->callback);	1977	SvREFCNT_dec (req->callback);
1389	req->callback = newSVsv (callback);	1978	req->callback = SvREFCNT_inc (cb_cv);
		1979	}
		1980	}
1390		1981
1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1982	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1392		1983
1393	void	1984	void
1394	add (aio_req grp, ...)	1985	add (aio_req grp, ...)
1395	PPCODE:	1986	PPCODE:
1396	{	1987	{
1397	int i;	1988	int i;
1398	aio_req req;
1399		1989
1400	if (grp->fd == 2)	1990	if (grp->int1 == 2)
1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1991	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1402		1992
1403	for (i = 1; i < items; ++i )	1993	for (i = 1; i < items; ++i )
1404	{	1994	{
		1995	aio_req req;
		1996
1405	if (GIMME_V != G_VOID)	1997	if (GIMME_V != G_VOID)
1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1998	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1407		1999
1408	req = SvAIO_REQ (ST (i));	2000	req = SvAIO_REQ (ST (i));
1409		2001
1410	if (req)	2002	if (req)
1411	{	2003	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	}	2004	}
1424	}	2005	}
		2006
		2007	void
		2008	cancel_subs (aio_req_ornot req)
		2009	CODE:
		2010	req_cancel_subs (req);
1425		2011
1426	void	2012	void
1427	result (aio_req grp, ...)	2013	result (aio_req grp, ...)
1428	CODE:	2014	CODE:
1429	{	2015	{
1430	int i;	2016	int i;
		2017	AV *av;
		2018
		2019	grp->errorno = errno;
		2020
1431	AV *av = newAV ();	2021	av = newAV ();
		2022	av_extend (av, items - 1);
1432		2023
1433	for (i = 1; i < items; ++i )	2024	for (i = 1; i < items; ++i )
1434	av_push (av, newSVsv (ST (i)));	2025	av_push (av, newSVsv (ST (i)));
1435		2026
1436	SvREFCNT_dec (grp->data);	2027	SvREFCNT_dec (grp->sv1);
1437	grp->data = (SV *)av;	2028	grp->sv1 = (SV *)av;
1438	}	2029	}
		2030
		2031	void
		2032	errno (aio_req grp, int errorno = errno)
		2033	CODE:
		2034	grp->errorno = errorno;
1439		2035
1440	void	2036	void
1441	limit (aio_req grp, int limit)	2037	limit (aio_req grp, int limit)
1442	CODE:	2038	CODE:
1443	grp->fd2 = limit;	2039	eio_grp_limit (grp, limit);
1444	aio_grp_feed (grp);
1445		2040
1446	void	2041	void
1447	feed (aio_req grp, SV *callback=&PL_sv_undef)	2042	feed (aio_req grp, SV *callback = &PL_sv_undef)
1448	CODE:	2043	CODE:
1449	{	2044	{
1450	SvREFCNT_dec (grp->fh2);	2045	SvREFCNT_dec (grp->sv2);
1451	grp->fh2 = newSVsv (callback);	2046	grp->sv2 = newSVsv (callback);
		2047	grp->feed = aio_grp_feed;
1452		2048
1453	if (grp->fd2 <= 0)	2049	if (grp->int2 <= 0)
1454	grp->fd2 = 2;	2050	grp->int2 = 2;
1455		2051
1456	aio_grp_feed (grp);	2052	eio_grp_limit (grp, grp->int2);
1457	}	2053	}
1458		2054

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