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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.78 by root, Thu Oct 26 14:35:34 2006 UTC vs.
Revision 1.224 by root, Thu Oct 11 03:20:52 2012 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
34	# if __linux	24	#if __linux__
		25	# include <linux/fs.h>
		26	# ifdef FS_IOC_FIEMAP
		27	# include <linux/types.h>
		28	# include <linux/fiemap.h>
		29	# define HAVE_FIEMAP 1
		30	# endif
		31	#endif
		32
		33	/* perl namespace pollution */
		34	#undef VERSION
		35
		36	/* perl stupidly overrides readdir and maybe others */
		37	/* with thread-unsafe versions, imagine that :( */
		38	#undef readdir
		39	#undef opendir
		40	#undef closedir
		41
		42	#ifdef _WIN32
		43
		44	// perl overrides all those nice libc functions
		45
		46	#undef malloc
		47	#undef free
		48	#undef open
		49	#undef read
		50	#undef write
		51	#undef send
		52	#undef recv
		53	#undef stat
		54	#undef lstat
		55	#undef fstat
		56	#undef truncate
		57	#undef ftruncate
		58	#undef open
		59	#undef link
		60	#undef close
		61	#undef unlink
		62	#undef mkdir
		63	#undef rmdir
		64	#undef rename
		65	#undef lseek
		66	#undef opendir
		67	#undef readdir
		68	#undef closedir
		69	#undef chmod
		70	#undef fchmod
		71	#undef dup
		72	#undef dup2
		73	#undef abort
		74	#undef pipe
		75
		76	#define EIO_STRUCT_STAT struct _stati64
		77	#define EIO_STRUCT_STATI64
		78
		79	#else
		80
		81	#include <sys/time.h>
35	# include <sys/sendfile.h>	82	#include <sys/select.h>
36	# elif __freebsd	83	#include <unistd.h>
37	# include <sys/socket.h>	84	#include <utime.h>
38	# include <sys/uio.h>	85	#include <signal.h>
39	# elif __hpux	86
40	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
41	# elif __solaris /* not yet */	88
42	# include <sys/sendfile.h>	89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	SV *sv3, *sv4; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/config.h"
		120	#include "libeio/eio.h"
		121
		122	static int req_invoke (eio_req *req);
		123	#define EIO_FINISH(req) req_invoke (req)
		124	static void req_destroy (eio_req *grp);
		125	#define EIO_DESTROY(req) req_destroy (req)
		126
		127	#include "libeio/eio.c"
		128
		129	#if !HAVE_POSIX_FADVISE
		130	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		131	#endif
		132
		133	#if !HAVE_POSIX_MADVISE
		134	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#ifndef MAP_ANONYMOUS
		138	# ifdef MAP_ANON
		139	# define MAP_ANONYMOUS MAP_ANON
43	# else	140	# else
44	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	142	# endif
46	#endif	143	#endif
47		144
48	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
49	#ifndef NAME_MAX	146	#include "def0.h"
50	# define NAME_MAX 4096
51	#endif
52		147
53	#ifndef PTHREAD_STACK_MIN	148	#ifndef makedev
54	/* care for broken platforms, e.g. windows */	149	# define makedev(maj,min) (((maj) << 8) | (min))
55	# define PTHREAD_STACK_MIN 16384
56	#endif	150	#endif
57		151	#ifndef major
58	#if __ia64	152	# define major(dev) ((dev) >> 8)
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif	153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
65		157
66	/* buffer size for various temporary buffers */	158	#ifndef PAGESIZE
67	#define AIO_BUFSIZE 65536	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
68		161
69	#define dBUF \	162	/*****************************************************************************/
70	char *aio_buf; \	163
71	LOCK (wrklock); \	164	static void
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	165	fiemap (eio_req *req)
73	UNLOCK (wrklock); \	166	{
74	if (!aio_buf) \	167	req->result = -1;
		168
		169	#if HAVE_FIEMAP
		170	/* assume some c99 */
		171	struct fiemap *fiemap = 0;
		172	size_t end_offset;
		173	int count = req->int3;
		174
		175	req->flags |= EIO_FLAG_PTR1_FREE;
		176
		177	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		178	/* increase in 3.5kb steps */
		179	if (count < 0)
		180	count = 8;
		181
		182	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		183	errno = ENOMEM;
		184	if (!fiemap)
75	return -1;	185	return;
76		186
77	enum {	187	req->ptr1 = fiemap;
78	REQ_QUIT,
79	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
83	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85	REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,
87	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,
89	};
90		188
91	#define AIO_REQ_KLASS "IO::AIO::REQ"	189	fiemap->fm_start = req->offs;
92	#define AIO_GRP_KLASS "IO::AIO::GRP"	190	fiemap->fm_length = req->size;
		191	fiemap->fm_flags = req->int2;
		192	fiemap->fm_extent_count = count;
93		193
94	typedef struct aio_cb	194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
95	{	195	return;
96	struct aio_cb *volatile next;
97		196
98	SV *data, *callback;	197	if (req->int3 >= 0 /* not autosizing */
99	SV *fh, *fh2;	198	|| !fiemap->fm_mapped_extents /* no more extents */
100	void *dataptr, *data2ptr;	199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
101	Stat_t *statdata;	200	goto done;
102	off_t offset;
103	size_t length;
104	ssize_t result;
105		201
106	STRLEN dataoffset;	202	/* else we have to loop -
107	int type;	203	* it would be tempting (atcually I tried that first) to just query the
108	int fd, fd2;	204	* number of extents needed, but linux often feels like not returning all
109	int errorno;	205	* extents, without telling us it left any out. this complicates
110	mode_t mode; /* open */	206	* this quite a bit.
		207	*/
111		208
112	unsigned char flags;	209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
113	unsigned char pri;
114		210
115	SV *self; /* the perl counterpart of this request, if any */	211	for (;;)
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
117	} aio_cb;
118
119	enum {
120	FLAG_CANCELLED = 0x01,
121	};
122
123	typedef aio_cb *aio_req;
124	typedef aio_cb *aio_req_ornot;
125
126	enum {
127	PRI_MIN = -4,
128	PRI_MAX = 4,
129
130	DEFAULT_PRI = 0,
131	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};
134
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
137	static unsigned int started, wanted;
138	static volatile unsigned int nreqs;
139	static volatile unsigned int max_outstanding = 0xffffffff;
140	static int respipe [2];
141
142	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
143	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
144	#else
145	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
146	#endif
147
148	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
149	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
150
151	/* worker threads management */
152	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
153
154	typedef struct worker {
155	/* locked by wrklock */
156	struct worker *prev, *next;
157
158	pthread_t tid;
159
160	/* locked by reslock, reqlock or wrklock */
161	aio_req req; /* currently processed request */
162	void *dbuf;
163	DIR *dirp;
164	} worker;
165
166	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
167
168	static void worker_clear (worker *wrk)
169	{
170	if (wrk->dirp)
171	{	212	{
172	closedir (wrk->dirp);	213	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
173	wrk->dirp = 0;	214	char scratch[3072];
174	}	215	struct fiemap *incmap = (struct fiemap *)scratch;
175		216
176	if (wrk->dbuf)	217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
177	{	218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
178	free (wrk->dbuf);	219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
179	wrk->dbuf = 0;	220	incmap->fm_flags = fiemap->fm_flags;
180	}	221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
181	}
182		222
183	static void worker_free (worker *wrk)	223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
184	{
185	wrk->next->prev = wrk->prev;
186	wrk->prev->next = wrk->next;
187
188	free (wrk);
189	}
190
191	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
192	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
193	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
194
195	/*
196	* a somewhat faster data structure might be nice, but
197	* with 8 priorities this actually needs <20 insns
198	* per shift, the most expensive operation.
199	*/
200	typedef struct {
201	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
202	int size;
203	} reqq;
204
205	static reqq req_queue;
206	static reqq res_queue;
207
208	int reqq_push (reqq *q, aio_req req)
209	{
210	int pri = req->pri;
211	req->next = 0;
212
213	if (q->qe[pri])
214	{
215	q->qe[pri]->next = req;
216	q->qe[pri] = req;
217	}
218	else
219	q->qe[pri] = q->qs[pri] = req;
220
221	return q->size++;
222	}
223
224	aio_req reqq_shift (reqq *q)
225	{
226	int pri;
227
228	if (!q->size)
229	return 0;	224	return;
230		225
231	--q->size;	226	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
232		227	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
233	for (pri = NUM_PRI; pri--; )	228	errno = ENOMEM;
234	{
235	aio_req req = q->qs[pri];
236
237	if (req)	229	if (!fiemap)
		230	return;
		231
		232	req->ptr1 = fiemap;
		233
		234	for (count = 0; count < incmap->fm_mapped_extents; ++count)
238	{	235	{
239	if (!(q->qs[pri] = req->next))	236	struct fiemap_extent *e = incmap->fm_extents + count;
240	q->qe[pri] = 0;
241		237
242	return req;	238	if (e->fe_logical + e->fe_length >= end_offset)
		239	goto done;
		240
		241	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		242
		243	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		244	goto done;
		245
243	}	246	}
244	}	247	}
245		248
246	abort ();	249	done:
247	}	250	req->result = 0;
248		251
249	static int poll_cb (int max);	252	#else
250	static void req_invoke (aio_req req);	253	errno = ENOSYS;
		254	#endif
		255	}
		256
		257	/*****************************************************************************/
		258
		259	enum {
		260	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		261	};
		262
		263	typedef eio_req *aio_req;
		264	typedef eio_req *aio_req_ornot;
		265	typedef eio_wd aio_wd;
		266
		267	static SV *on_next_submit;
		268	static int next_pri = EIO_PRI_DEFAULT;
		269	static int max_outstanding;
		270
		271	static s_epipe respipe;
		272
251	static void req_free (aio_req req);	273	static void req_destroy (aio_req req);
252	static void req_cancel (aio_req req);	274	static void req_cancel (aio_req req);
253		275
		276	static void
		277	want_poll (void)
		278	{
		279	/* write a dummy byte to the pipe so fh becomes ready */
		280	s_epipe_signal (&respipe);
		281	}
		282
		283	static void
		284	done_poll (void)
		285	{
		286	/* read any signals sent by the worker threads */
		287	s_epipe_drain (&respipe);
		288	}
		289
254	/* must be called at most once */	290	/* must be called at most once */
255	static SV *req_sv (aio_req req, const char *klass)	291	static SV *
		292	req_sv (aio_req req, HV *stash)
256	{	293	{
257	if (!req->self)	294	if (!req->self)
258	{	295	{
259	req->self = (SV *)newHV ();	296	req->self = (SV *)newHV ();
260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	297	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
261	}	298	}
262		299
263	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	300	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
264	}	301	}
265		302
266	static aio_req SvAIO_REQ (SV *sv)	303	static SV *
		304	newSVaio_wd (aio_wd wd)
		305	{
		306	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		307	}
		308
		309	static aio_req
		310	SvAIO_REQ (SV *sv)
267	{	311	{
268	MAGIC *mg;	312	MAGIC *mg;
269		313
270	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	314	if (!SvROK (sv)
		315	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		316	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		317	&& SvSTASH (SvRV (sv)) != aio_req_stash
		318	&& !sv_derived_from (sv, "IO::AIO::REQ")))
271	croak ("object of class " AIO_REQ_KLASS " expected");	319	croak ("object of class IO::AIO::REQ expected");
272		320
273	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
274		322
275	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
276	}	324	}
277		325
		326	static aio_wd
		327	SvAIO_WD (SV *sv)
		328	{
		329	if (!SvROK (sv)
		330	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		331	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		332	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		333
		334	return (aio_wd)(long)SvIVX (SvRV (sv));
		335	}
		336
		337	static void
278	static void aio_grp_feed (aio_req grp)	338	aio_grp_feed (aio_req grp)
279	{	339	{
280	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	340	if (grp->sv2 && SvOK (grp->sv2))
281	{	341	{
282	int old_len = grp->length;
283
284	if (grp->fh2 && SvOK (grp->fh2))
285	{
286	dSP;	342	dSP;
287		343
288	ENTER;	344	ENTER;
289	SAVETMPS;	345	SAVETMPS;
290	PUSHMARK (SP);	346	PUSHMARK (SP);
291	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	347	XPUSHs (req_sv (grp, aio_grp_stash));
292	PUTBACK;	348	PUTBACK;
293	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	349	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
294	SPAGAIN;	350	SPAGAIN;
295	FREETMPS;	351	FREETMPS;
296	LEAVE;	352	LEAVE;
297	}
298
299	/* stop if no progress has been made */
300	if (old_len == grp->length)
301	{
302	SvREFCNT_dec (grp->fh2);
303	grp->fh2 = 0;
304	break;
305	}
306	}	353	}
307	}	354	}
308		355
309	static void aio_grp_dec (aio_req grp)	356	static void
		357	req_submit (eio_req *req)
310	{	358	{
311	--grp->length;	359	eio_submit (req);
312		360
313	/* call feeder, if applicable */	361	if (expect_false (on_next_submit))
314	aio_grp_feed (grp);
315
316	/* finish, if done */
317	if (!grp->length && grp->fd)
318	{	362	{
319	req_invoke (grp);	363	dSP;
320	req_free (grp);	364	SV *cb = sv_2mortal (on_next_submit);
		365
		366	on_next_submit = 0;
		367
		368	PUSHMARK (SP);
		369	PUTBACK;
		370	call_sv (cb, G_DISCARD | G_EVAL);
321	}	371	}
322	}	372	}
323		373
324	static void poll_wait ()	374	static int
		375	req_invoke (eio_req *req)
325	{	376	{
326	fd_set rfd;	377	if (req->flags & FLAG_SV2_RO_OFF)
		378	SvREADONLY_off (req->sv2);
327		379
328	while (nreqs)	380	if (!EIO_CANCELLED (req) && req->callback)
329	{	381	{
330	int size;
331	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
332	LOCK (reslock);
333	#endif
334	size = res_queue.size;
335	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
336	UNLOCK (reslock);
337	#endif
338
339	if (size)
340	return;
341
342	FD_ZERO(&rfd);
343	FD_SET(respipe [0], &rfd);
344
345	select (respipe [0] + 1, &rfd, 0, 0, 0);
346	}
347	}
348
349	static void req_invoke (aio_req req)
350	{
351	dSP;	382	dSP;
352		383	static SV *sv_result_cache; /* caches the result integer SV */
353	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	384	SV *sv_result;
354	{
355	errno = req->errorno;
356		385
357	ENTER;	386	ENTER;
358	SAVETMPS;	387	SAVETMPS;
359	PUSHMARK (SP);	388	PUSHMARK (SP);
360	EXTEND (SP, 1);	389	EXTEND (SP, 1);
361		390
		391	/* do not recreate the result IV from scratch each time */
		392	if (expect_true (sv_result_cache))
		393	{
		394	sv_result = sv_result_cache; sv_result_cache = 0;
		395	SvIV_set (sv_result, req->result);
		396	SvIOK_only (sv_result);
		397	}
		398	else
		399	{
		400	sv_result = newSViv (req->result);
		401	SvREADONLY_on (sv_result);
		402	}
		403
362	switch (req->type)	404	switch (req->type)
363	{	405	{
		406	case EIO_WD_OPEN:
		407	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		408	break;
		409
364	case REQ_READDIR:	410	case EIO_READDIR:
365	{	411	{
366	SV *rv = &PL_sv_undef;	412	SV *rv = &PL_sv_undef;
367		413
368	if (req->result >= 0)	414	if (req->result >= 0)
369	{	415	{
370	int i;	416	int i;
371	char *buf = req->data2ptr;	417	char *names = (char *)req->ptr2;
		418	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
372	AV *av = newAV ();	419	AV *av = newAV ();
373		420
374	av_extend (av, req->result - 1);	421	av_extend (av, req->result - 1);
375		422
376	for (i = 0; i < req->result; ++i)	423	for (i = 0; i < req->result; ++i)
377	{	424	{
378	SV *sv = newSVpv (buf, 0);	425	if (req->int1 & EIO_READDIR_DENTS)
		426	{
		427	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
379		428
		429	if (req->int1 & EIO_READDIR_CUSTOM2)
		430	{
		431	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		432	AV *avent = newAV ();
		433
		434	av_extend (avent, 2);
		435
		436	if (!sv_type [ent->type])
		437	{
		438	sv_type [ent->type] = newSViv (ent->type);
		439	SvREADONLY_on (sv_type [ent->type]);
		440	}
		441
		442	av_store (avent, 0, namesv);
		443	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		444	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		445
		446	av_store (av, i, newRV_noinc ((SV *)avent));
		447	}
		448	else
380	av_store (av, i, sv);	449	av_store (av, i, namesv);
		450
		451	++ent;
		452	}
		453	else
		454	{
		455	SV *name = newSVpv (names, 0);
		456	av_store (av, i, name);
381	buf += SvCUR (sv) + 1;	457	names += SvCUR (name) + 1;
		458	}
382	}	459	}
383		460
384	rv = sv_2mortal (newRV_noinc ((SV *)av));	461	rv = sv_2mortal (newRV_noinc ((SV *)av));
385	}	462	}
386		463
387	PUSHs (rv);	464	PUSHs (rv);
		465
		466	if (req->int1 & EIO_READDIR_CUSTOM1)
		467	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
388	}	468	}
389	break;	469	break;
390		470
391	case REQ_OPEN:	471	case EIO_OPEN:
392	{	472	{
393	/* convert fd to fh */	473	/* convert fd to fh */
394	SV *fh;	474	SV *fh = &PL_sv_undef;
395		475
396	PUSHs (sv_2mortal (newSViv (req->result)));	476	if (req->result >= 0)
397	PUTBACK;	477	{
398	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	478	GV *gv = (GV *)sv_newmortal ();
399	SPAGAIN;	479	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		480	char sym [64];
		481	int symlen;
		482
		483	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		484	gv_init (gv, aio_stash, sym, symlen, 0);
400		485
401	fh = SvREFCNT_inc (POPs);	486	symlen = snprintf (
		487	sym,
		488	sizeof (sym),
		489	"%s&=%d",
		490	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		491	(int)req->result
		492	);
402		493
		494	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		495	fh = (SV *)gv;
		496	}
		497
403	PUSHMARK (SP);	498	PUSHs (fh);
404	XPUSHs (sv_2mortal (fh));
405	}	499	}
406	break;	500	break;
407		501
		502	case EIO_STATVFS:
		503	case EIO_FSTATVFS:
		504	{
		505	SV *rv = &PL_sv_undef;
		506
		507	#ifndef _WIN32
		508	if (req->result >= 0)
		509	{
		510	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		511	HV *hv = newHV ();
		512	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		513	* chooses to make it a struct.
		514	*/
		515	unsigned long fsid = 0;
		516	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		517
		518	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		519
		520	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		521	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		522	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		523	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		524	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		525	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		526	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		527	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		528	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		529	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		530	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		531	}
		532	#endif
		533
		534	PUSHs (rv);
		535	}
		536
		537	break;
		538
408	case REQ_GROUP:	539	case EIO_GROUP:
409	req->fd = 2; /* mark group as finished */	540	req->int1 = 2; /* mark group as finished */
410		541
411	if (req->data)	542	if (req->sv1)
412	{	543	{
413	int i;	544	int i;
414	AV *av = (AV *)req->data;	545	AV *av = (AV *)req->sv1;
415		546
416	EXTEND (SP, AvFILL (av) + 1);	547	EXTEND (SP, AvFILL (av) + 1);
417	for (i = 0; i <= AvFILL (av); ++i)	548	for (i = 0; i <= AvFILL (av); ++i)
418	PUSHs (*av_fetch (av, i, 0));	549	PUSHs (*av_fetch (av, i, 0));
419	}	550	}
420	break;	551	break;
421		552
422	case REQ_NOP:	553	case EIO_NOP:
423	case REQ_BUSY:	554	case EIO_BUSY:
424	break;	555	break;
425		556
		557	case EIO_READLINK:
		558	case EIO_REALPATH:
		559	if (req->result > 0)
		560	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		561	break;
		562
		563	case EIO_STAT:
		564	case EIO_LSTAT:
		565	case EIO_FSTAT:
		566	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		567
		568	if (!(PL_laststatval = req->result))
		569	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		570	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		571
		572	PUSHs (sv_result);
		573	break;
		574
		575	case EIO_SEEK:
		576	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		577	break;
		578
		579	case EIO_READ:
		580	{
		581	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		582	*SvEND (req->sv2) = 0;
		583	SvPOK_only (req->sv2);
		584	SvSETMAGIC (req->sv2);
		585	PUSHs (sv_result);
		586	}
		587	break;
		588
		589	case EIO_CUSTOM:
		590	if (req->feed == fiemap)
		591	{
		592	#if HAVE_FIEMAP
		593	if (!req->result)
		594	{
		595	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		596
		597	if (fiemap->fm_extent_count)
		598	{
		599	AV *av = newAV ();
		600	int i;
		601
		602	while (fiemap->fm_mapped_extents)
		603	{
		604	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		605	AV *ext_av = newAV ();
		606
		607	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		608	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		609	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		610	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		611
		612	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		613	}
		614
		615	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		616	}
		617	else
		618	{
		619	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		620	PUSHs (sv_result);
		621	}
		622	}
		623	#endif
		624	}
		625	else
		626	PUSHs (sv_result);
		627	break;
		628
		629	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		630	if (req->result > 0)
		631	SvIV_set (sv_result, 0);
		632	/* FALLTHROUGH */
		633
426	default:	634	default:
427	PUSHs (sv_2mortal (newSViv (req->result)));	635	PUSHs (sv_result);
428	break;	636	break;
429	}	637	}
430		638
		639	errno = req->errorno;
431		640
432	PUTBACK;	641	PUTBACK;
433	call_sv (req->callback, G_VOID | G_EVAL);	642	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
434	SPAGAIN;	643	SPAGAIN;
		644
		645	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		646	SvREFCNT_dec (sv_result);
		647	else
		648	sv_result_cache = sv_result;
435		649
436	FREETMPS;	650	FREETMPS;
437	LEAVE;	651	LEAVE;
		652
		653	PUTBACK;
438	}	654	}
439		655
440	if (req->grp)	656	return !!SvTRUE (ERRSV);
441	{
442	aio_req grp = req->grp;
443
444	/* unlink request */
445	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
446	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
447
448	if (grp->grp_first == req)
449	grp->grp_first = req->grp_next;
450
451	aio_grp_dec (grp);
452	}
453
454	if (SvTRUE (ERRSV))
455	{
456	req_free (req);
457	croak (0);
458	}
459	}	657	}
460		658
461	static void req_free (aio_req req)	659	static void
		660	req_destroy (aio_req req)
462	{	661	{
463	if (req->self)	662	if (req->self)
464	{	663	{
465	sv_unmagic (req->self, PERL_MAGIC_ext);	664	sv_unmagic (req->self, PERL_MAGIC_ext);
466	SvREFCNT_dec (req->self);	665	SvREFCNT_dec (req->self);
467	}	666	}
468		667
469	SvREFCNT_dec (req->data);
470	SvREFCNT_dec (req->fh);	668	SvREFCNT_dec (req->sv1);
471	SvREFCNT_dec (req->fh2);	669	SvREFCNT_dec (req->sv2);
		670	SvREFCNT_dec (req->sv3);
		671	SvREFCNT_dec (req->sv4);
472	SvREFCNT_dec (req->callback);	672	SvREFCNT_dec (req->callback);
473	Safefree (req->statdata);
474		673
475	if (req->type == REQ_READDIR)
476	free (req->data2ptr);
477
478	Safefree (req);	674	free (req);
479	}	675	}
480		676
		677	static void
481	static void req_cancel_subs (aio_req grp)	678	req_cancel_subs (aio_req grp)
482	{	679	{
483	aio_req sub;
484
485	if (grp->type != REQ_GROUP)	680	if (grp->type != EIO_GROUP)
486	return;	681	return;
487		682
488	SvREFCNT_dec (grp->fh2);	683	SvREFCNT_dec (grp->sv2);
489	grp->fh2 = 0;	684	grp->sv2 = 0;
490		685
491	for (sub = grp->grp_first; sub; sub = sub->grp_next)	686	eio_grp_cancel (grp);
492	req_cancel (sub);
493	}	687	}
494		688
495	static void req_cancel (aio_req req)	689	static void ecb_cold
		690	create_respipe (void)
496	{	691	{
497	req->flags |= FLAG_CANCELLED;	692	if (s_epipe_renew (&respipe))
498		693	croak ("IO::AIO: unable to initialize result pipe");
499	req_cancel_subs (req);
500	}	694	}
501		695
502	static int poll_cb (int max)	696	static void
		697	poll_wait (void)
503	{	698	{
504	dSP;	699	while (eio_nreqs ())
505	int count = 0;	700	{
506	int do_croak = 0;	701	int size;
507	aio_req req;
508		702
		703	X_LOCK (reslock);
		704	size = res_queue.size;
		705	X_UNLOCK (reslock);
		706
		707	if (size)
		708	return;
		709
		710	etp_maybe_start_thread ();
		711
		712	s_epipe_wait (&respipe);
		713	}
		714	}
		715
		716	static int
		717	poll_cb (void)
		718	{
509	for (;;)	719	for (;;)
510	{	720	{
511	while (max <= 0 || count < max)	721	int res = eio_poll ();
		722
		723	if (res > 0)
		724	croak (0);
		725
		726	if (!max_outstanding || max_outstanding > eio_nreqs ())
		727	return res;
		728
		729	poll_wait ();
		730	}
		731	}
		732
		733	static void ecb_cold
		734	reinit (void)
		735	{
		736	create_respipe ();
		737
		738	if (eio_init (want_poll, done_poll) < 0)
		739	croak ("IO::AIO: unable to initialise eio library");
		740	}
		741
		742	/*****************************************************************************/
		743
		744	#if !_POSIX_MAPPED_FILES
		745	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		746	# define munmap(addr,length) EIO_ENOSYS ()
		747	#endif
		748
		749	#if !_POSIX_MEMORY_PROTECTION
		750	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		751	# define PROT_NONE 0
		752	# define PROT_WRITE 0
		753	# define MAP_PRIVATE 0
		754	# define MAP_SHARED 0
		755	# define MAP_FIXED 0
		756	#endif
		757
		758	#define MMAP_MAGIC PERL_MAGIC_ext
		759
		760	static int ecb_cold
		761	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		762	{
		763	int old_errno = errno;
		764	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		765	errno = old_errno;
		766
		767	mg->mg_obj = 0; /* just in case */
		768
		769	SvREADONLY_off (sv);
		770
		771	if (SvPVX (sv) != mg->mg_ptr)
		772	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		773
		774	SvCUR_set (sv, 0);
		775	SvPVX (sv) = 0;
		776	SvOK_off (sv);
		777
		778	return 0;
		779	}
		780
		781	static MGVTBL mmap_vtbl = {
		782	0, 0, 0, 0, mmap_free
		783	};
		784
		785	/*****************************************************************************/
		786
		787	static SV *
		788	get_cb (SV *cb_sv)
		789	{
		790	SvGETMAGIC (cb_sv);
		791	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		792	}
		793
		794	static aio_req ecb_noinline
		795	dreq (SV *callback)
		796	{
		797	SV *cb_cv;
		798	aio_req req;
		799	int req_pri = next_pri;
		800	next_pri = EIO_PRI_DEFAULT;
		801
		802	cb_cv = get_cb (callback);
		803
		804	req = calloc (sizeof (*req), 1);
		805	if (!req)
		806	croak ("out of memory during eio_req allocation");
		807
		808	req->callback = SvREFCNT_inc (cb_cv);
		809	req->pri = req_pri;
		810
		811	return req;
		812	}
		813
		814	#define dREQ \
		815	aio_req req = dreq (callback); \
		816
		817	#define REQ_SEND \
		818	PUTBACK; \
		819	req_submit (req); \
		820	SPAGAIN; \
		821	\
		822	if (GIMME_V != G_VOID) \
		823	XPUSHs (req_sv (req, aio_req_stash));
		824
		825	ecb_inline void
		826	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		827	{
		828	if (expect_false (SvROK (path)))
		829	{
		830	SV *rv = SvRV (path);
		831	SV *wdob;
		832
		833	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
512	{	834	{
513	LOCK (reslock);	835	path = AvARRAY (rv)[1];
514	req = reqq_shift (&res_queue);	836	wdob = AvARRAY (rv)[0];
515		837
516	if (req)	838	if (SvOK (wdob))
517	{	839	{
518	if (!res_queue.size)	840	*wd = SvAIO_WD (wdob);
519	{	841	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
520	/* read any signals sent by the worker threads */
521	char buf [32];
522	while (read (respipe [0], buf, 32) == 32)
523	;
524	}
525	}
526
527	UNLOCK (reslock);
528
529	if (!req)
530	break;
531
532	--nreqs;
533
534	if (req->type == REQ_QUIT)
535	--started;
536	else if (req->type == REQ_GROUP && req->length)
537	{
538	req->fd = 1; /* mark request as delayed */
539	continue;
540	}	842	}
541	else	843	else
542	{	844	*wd = EIO_INVALID_WD;
543	if (req->type == REQ_READ)
544	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
545
546	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
547	SvREADONLY_off (req->data);
548
549	if (req->statdata)
550	{
551	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
552	PL_laststatval = req->result;
553	PL_statcache = *(req->statdata);
554	}
555
556	req_invoke (req);
557
558	count++;
559	}
560
561	req_free (req);
562	}	845	}
		846	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		847	{
		848	*wd = (aio_wd)(long)SvIVX (rv);
		849	*wdsv = SvREFCNT_inc_NN (rv);
		850	*ptr = ".";
		851	return; /* path set to "." */
		852	}
		853	else
		854	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		855	}
563		856
564	if (nreqs <= max_outstanding)	857	*pathsv = newSVsv (path);
		858	*ptr = SvPVbyte_nolen (*pathsv);
		859	}
		860
		861	static void ecb_noinline
		862	req_set_path1 (aio_req req, SV *path)
		863	{
		864	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		865	}
		866
		867	static void ecb_noinline
		868	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		869	{
		870	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		871
		872	switch (SvTYPE (rv))
		873	{
		874	case SVt_PVIO:
		875	case SVt_PVLV:
		876	case SVt_PVGV:
		877	req->type = type_fh;
		878	req->sv1 = newSVsv (fh_or_path);
		879	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
565	break;	880	break;
566		881
567	poll_wait ();	882	default:
568		883	req->type = type_path;
569	max = 0;	884	req_set_path1 (req, fh_or_path);
		885	break;
570	}	886	}
571
572	return count;
573	}	887	}
574		888
575	static void *aio_proc(void *arg);	889	XS(boot_IO__AIO) ecb_cold;
576		890
577	static void start_thread (void)
578	{
579	sigset_t fullsigset, oldsigset;
580	pthread_attr_t attr;
581
582	worker *wrk = calloc (1, sizeof (worker));
583
584	if (!wrk)
585	croak ("unable to allocate worker thread data");
586
587	pthread_attr_init (&attr);
588	pthread_attr_setstacksize (&attr, STACKSIZE);
589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
590
591	sigfillset (&fullsigset);
592
593	LOCK (wrklock);
594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
595
596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597	{
598	wrk->prev = &wrk_first;
599	wrk->next = wrk_first.next;
600	wrk_first.next->prev = wrk;
601	wrk_first.next = wrk;
602	++started;
603	}
604	else
605	free (wrk);
606
607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
608	UNLOCK (wrklock);
609	}
610
611	static void req_send (aio_req req)
612	{
613	while (started < wanted && nreqs >= started)
614	start_thread ();
615
616	++nreqs;
617
618	LOCK (reqlock);
619	reqq_push (&req_queue, req);
620	pthread_cond_signal (&reqwait);
621	UNLOCK (reqlock);
622	}
623
624	static void end_thread (void)
625	{
626	aio_req req;
627
628	Newz (0, req, 1, aio_cb);
629
630	req->type = REQ_QUIT;
631	req->pri = PRI_MAX + PRI_BIAS;
632
633	req_send (req);
634	}
635
636	static void min_parallel (int nthreads)
637	{
638	if (wanted < nthreads)
639	wanted = nthreads;
640	}
641
642	static void max_parallel (int nthreads)
643	{
644	int cur = started;
645
646	if (wanted > nthreads)
647	wanted = nthreads;
648
649	while (cur > wanted)
650	{
651	end_thread ();
652	cur--;
653	}
654
655	while (started > wanted)
656	{
657	poll_wait ();
658	poll_cb (0);
659	}
660	}
661
662	static void create_pipe ()
663	{
664	if (pipe (respipe))
665	croak ("unable to initialize result pipe");
666
667	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
668	croak ("cannot set result pipe to nonblocking mode");
669
670	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
671	croak ("cannot set result pipe to nonblocking mode");
672	}
673
674	/*****************************************************************************/
675	/* work around various missing functions */
676
677	#if !HAVE_PREADWRITE
678	# define pread aio_pread
679	# define pwrite aio_pwrite
680
681	/*
682	* make our pread/pwrite safe against themselves, but not against
683	* normal read/write by using a mutex. slows down execution a lot,
684	* but that's your problem, not mine.
685	*/
686	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
687
688	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
689	{
690	ssize_t res;
691	off_t ooffset;
692
693	LOCK (preadwritelock);
694	ooffset = lseek (fd, 0, SEEK_CUR);
695	lseek (fd, offset, SEEK_SET);
696	res = read (fd, buf, count);
697	lseek (fd, ooffset, SEEK_SET);
698	UNLOCK (preadwritelock);
699
700	return res;
701	}
702
703	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
704	{
705	ssize_t res;
706	off_t ooffset;
707
708	LOCK (preadwritelock);
709	ooffset = lseek (fd, 0, SEEK_CUR);
710	lseek (fd, offset, SEEK_SET);
711	res = write (fd, buf, count);
712	lseek (fd, offset, SEEK_SET);
713	UNLOCK (preadwritelock);
714
715	return res;
716	}
717	#endif
718
719	#if !HAVE_FDATASYNC
720	# define fdatasync fsync
721	#endif
722
723	#if !HAVE_READAHEAD
724	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
725
726	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
727	{
728	dBUF;
729
730	while (count > 0)
731	{
732	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
733
734	pread (fd, aio_buf, len, offset);
735	offset += len;
736	count -= len;
737	}
738
739	errno = 0;
740	}
741
742	#endif
743
744	#if !HAVE_READDIR_R
745	# define readdir_r aio_readdir_r
746
747	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
748
749	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
750	{
751	struct dirent *e;
752	int errorno;
753
754	LOCK (readdirlock);
755
756	e = readdir (dirp);
757	errorno = errno;
758
759	if (e)
760	{
761	*res = ent;
762	strcpy (ent->d_name, e->d_name);
763	}
764	else
765	*res = 0;
766
767	UNLOCK (readdirlock);
768
769	errno = errorno;
770	return e ? 0 : -1;
771	}
772	#endif
773
774	/* sendfile always needs emulation */
775	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
776	{
777	ssize_t res;
778
779	if (!count)
780	return 0;
781
782	#if HAVE_SENDFILE
783	# if __linux
784	res = sendfile (ofd, ifd, &offset, count);
785
786	# elif __freebsd
787	/*
788	* Of course, the freebsd sendfile is a dire hack with no thoughts
789	* wasted on making it similar to other I/O functions.
790	*/
791	{
792	off_t sbytes;
793	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
794
795	if (res < 0 && sbytes)
796	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
797	res = sbytes;
798	}
799
800	# elif __hpux
801	res = sendfile (ofd, ifd, offset, count, 0, 0);
802
803	# elif __solaris
804	{
805	struct sendfilevec vec;
806	size_t sbytes;
807
808	vec.sfv_fd = ifd;
809	vec.sfv_flag = 0;
810	vec.sfv_off = offset;
811	vec.sfv_len = count;
812
813	res = sendfilev (ofd, &vec, 1, &sbytes);
814
815	if (res < 0 && sbytes)
816	res = sbytes;
817	}
818
819	# endif
820	#else
821	res = -1;
822	errno = ENOSYS;
823	#endif
824
825	if (res < 0
826	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
827	#if __solaris
828	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
829	#endif
830	)
831	)
832	{
833	/* emulate sendfile. this is a major pain in the ass */
834	dBUF;
835
836	res = 0;
837
838	while (count)
839	{
840	ssize_t cnt;
841
842	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
843
844	if (cnt <= 0)
845	{
846	if (cnt && !res) res = -1;
847	break;
848	}
849
850	cnt = write (ofd, aio_buf, cnt);
851
852	if (cnt <= 0)
853	{
854	if (cnt && !res) res = -1;
855	break;
856	}
857
858	offset += cnt;
859	res += cnt;
860	count -= cnt;
861	}
862	}
863
864	return res;
865	}
866
867	/* read a full directory */
868	static void scandir_ (aio_req req, worker *self)
869	{
870	DIR *dirp;
871	union
872	{
873	struct dirent d;
874	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
875	} *u;
876	struct dirent *entp;
877	char *name, *names;
878	int memlen = 4096;
879	int memofs = 0;
880	int res = 0;
881	int errorno;
882
883	LOCK (wrklock);
884	self->dirp = dirp = opendir (req->dataptr);
885	self->dbuf = u = malloc (sizeof (*u));
886	req->data2ptr = names = malloc (memlen);
887	UNLOCK (wrklock);
888
889	if (dirp && u && names)
890	for (;;)
891	{
892	errno = 0;
893	readdir_r (dirp, &u->d, &entp);
894
895	if (!entp)
896	break;
897
898	name = entp->d_name;
899
900	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
901	{
902	int len = strlen (name) + 1;
903
904	res++;
905
906	while (memofs + len > memlen)
907	{
908	memlen *= 2;
909	LOCK (wrklock);
910	req->data2ptr = names = realloc (names, memlen);
911	UNLOCK (wrklock);
912
913	if (!names)
914	break;
915	}
916
917	memcpy (names + memofs, name, len);
918	memofs += len;
919	}
920	}
921
922	if (errno)
923	res = -1;
924
925	req->result = res;
926	}
927
928	/*****************************************************************************/
929
930	static void *aio_proc (void *thr_arg)
931	{
932	aio_req req;
933	int type;
934	worker *self = (worker *)thr_arg;
935
936	do
937	{
938	LOCK (reqlock);
939
940	for (;;)
941	{
942	self->req = req = reqq_shift (&req_queue);
943
944	if (req)
945	break;
946
947	pthread_cond_wait (&reqwait, &reqlock);
948	}
949
950	UNLOCK (reqlock);
951
952	errno = 0; /* strictly unnecessary */
953	type = req->type; /* remember type for QUIT check */
954
955	if (!(req->flags & FLAG_CANCELLED))
956	switch (type)
957	{
958	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
959	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
960
961	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
962	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
963
964	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
965	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
966	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
967
968	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
969	case REQ_CLOSE: req->result = close (req->fd); break;
970	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
971	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
972	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
973	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
974	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
975
976	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
977	case REQ_FSYNC: req->result = fsync (req->fd); break;
978	case REQ_READDIR: scandir_ (req, self); break;
979
980	case REQ_BUSY:
981	{
982	struct timeval tv;
983
984	tv.tv_sec = req->fd;
985	tv.tv_usec = req->fd2;
986
987	req->result = select (0, 0, 0, 0, &tv);
988	}
989
990	case REQ_GROUP:
991	case REQ_NOP:
992	case REQ_QUIT:
993	break;
994
995	default:
996	req->result = ENOSYS;
997	break;
998	}
999
1000	req->errorno = errno;
1001
1002	LOCK (reslock);
1003
1004	if (!reqq_push (&res_queue, req))
1005	/* write a dummy byte to the pipe so fh becomes ready */
1006	write (respipe [1], &respipe, 1);
1007
1008	self->req = 0;
1009	worker_clear (self);
1010
1011	UNLOCK (reslock);
1012	}
1013	while (type != REQ_QUIT);
1014
1015	LOCK (wrklock);
1016	worker_free (self);
1017	UNLOCK (wrklock);
1018
1019	return 0;
1020	}
1021
1022	/*****************************************************************************/
1023
1024	static void atfork_prepare (void)
1025	{
1026	LOCK (wrklock);
1027	LOCK (reqlock);
1028	LOCK (reslock);
1029	#if !HAVE_PREADWRITE
1030	LOCK (preadwritelock);
1031	#endif
1032	#if !HAVE_READDIR_R
1033	LOCK (readdirlock);
1034	#endif
1035	}
1036
1037	static void atfork_parent (void)
1038	{
1039	#if !HAVE_READDIR_R
1040	UNLOCK (readdirlock);
1041	#endif
1042	#if !HAVE_PREADWRITE
1043	UNLOCK (preadwritelock);
1044	#endif
1045	UNLOCK (reslock);
1046	UNLOCK (reqlock);
1047	UNLOCK (wrklock);
1048	}
1049
1050	static void atfork_child (void)
1051	{
1052	aio_req prv;
1053
1054	while (prv = reqq_shift (&req_queue))
1055	req_free (prv);
1056
1057	while (prv = reqq_shift (&res_queue))
1058	req_free (prv);
1059
1060	while (wrk_first.next != &wrk_first)
1061	{
1062	worker *wrk = wrk_first.next;
1063
1064	if (wrk->req)
1065	req_free (wrk->req);
1066
1067	worker_clear (wrk);
1068	worker_free (wrk);
1069	}
1070
1071	started = 0;
1072	nreqs = 0;
1073
1074	close (respipe [0]);
1075	close (respipe [1]);
1076	create_pipe ();
1077
1078	atfork_parent ();
1079	}
1080
1081	#define dREQ \
1082	aio_req req; \
1083	int req_pri = next_pri; \
1084	next_pri = DEFAULT_PRI + PRI_BIAS; \
1085	\
1086	if (SvOK (callback) && !SvROK (callback)) \
1087	croak ("callback must be undef or of reference type"); \
1088	\
1089	Newz (0, req, 1, aio_cb); \
1090	if (!req) \
1091	croak ("out of memory during aio_req allocation"); \
1092	\
1093	req->callback = newSVsv (callback); \
1094	req->pri = req_pri
1095
1096	#define REQ_SEND \
1097	req_send (req); \
1098	\
1099	if (GIMME_V != G_VOID) \
1100	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1101
1102	MODULE = IO::AIO PACKAGE = IO::AIO	891	MODULE = IO::AIO PACKAGE = IO::AIO
1103		892
1104	PROTOTYPES: ENABLE	893	PROTOTYPES: ENABLE
1105		894
1106	BOOT:	895	BOOT:
1107	{	896	{
		897	static const struct {
		898	const char *name;
		899	IV iv;
		900	} *civ, const_iv[] = {
		901	# define const_niv(name, value) { # name, (IV) value },
		902	# define const_iv(name) { # name, (IV) name },
		903	# define const_eio(name) { # name, (IV) EIO_ ## name },
		904
		905	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		906
		907	const_iv (ENOSYS)
		908	const_iv (EXDEV)
		909	const_iv (EBADR)
		910
		911	const_iv (O_RDONLY)
		912	const_iv (O_WRONLY)
		913	const_iv (O_RDWR)
		914	const_iv (O_CREAT)
		915	const_iv (O_TRUNC)
		916	const_iv (O_EXCL)
		917	const_iv (O_APPEND)
		918
		919	const_iv (O_ASYNC)
		920	const_iv (O_DIRECT)
		921	const_iv (O_NOATIME)
		922
		923	const_iv (O_CLOEXEC)
		924	const_iv (O_NOCTTY)
		925	const_iv (O_NOFOLLOW)
		926	const_iv (O_NONBLOCK)
		927	const_iv (O_EXEC)
		928	const_iv (O_SEARCH)
		929	const_iv (O_DIRECTORY)
		930	const_iv (O_DSYNC)
		931	const_iv (O_RSYNC)
		932	const_iv (O_SYNC)
		933	const_iv (O_TTY_INIT)
		934
		935	const_iv (S_IFIFO)
		936	const_iv (S_IFCHR)
		937	const_iv (S_IFBLK)
		938	const_iv (S_IFLNK)
		939	const_iv (S_IFREG)
		940	const_iv (S_IFDIR)
		941	const_iv (S_IFWHT)
		942	const_iv (S_IFSOCK)
		943	const_iv (S_IFMT)
		944
		945	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		946	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		947	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		948	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		949	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		950	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		951
		952	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		953	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		954	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		955	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		956	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		957
		958	const_iv (ST_RDONLY)
		959	const_iv (ST_NOSUID)
		960	const_iv (ST_NODEV)
		961	const_iv (ST_NOEXEC)
		962	const_iv (ST_SYNCHRONOUS)
		963	const_iv (ST_MANDLOCK)
		964	const_iv (ST_WRITE)
		965	const_iv (ST_APPEND)
		966	const_iv (ST_IMMUTABLE)
		967	const_iv (ST_NOATIME)
		968	const_iv (ST_NODIRATIME)
		969	const_iv (ST_RELATIME)
		970
		971	const_iv (PROT_NONE)
		972	const_iv (PROT_EXEC)
		973	const_iv (PROT_READ)
		974	const_iv (PROT_WRITE)
		975
		976	/*const_iv (MAP_FIXED)*/
		977	const_iv (MAP_PRIVATE)
		978	const_iv (MAP_SHARED)
		979	const_iv (MAP_ANONYMOUS)
		980
		981	/* linuxish */
		982	const_iv (MAP_HUGETLB)
		983	const_iv (MAP_LOCKED)
		984	const_iv (MAP_NORESERVE)
		985	const_iv (MAP_POPULATE)
		986	const_iv (MAP_NONBLOCK)
		987
		988	const_iv (FIEMAP_FLAG_SYNC)
		989	const_iv (FIEMAP_FLAG_XATTR)
		990	const_iv (FIEMAP_FLAGS_COMPAT)
		991	const_iv (FIEMAP_EXTENT_LAST)
		992	const_iv (FIEMAP_EXTENT_UNKNOWN)
		993	const_iv (FIEMAP_EXTENT_DELALLOC)
		994	const_iv (FIEMAP_EXTENT_ENCODED)
		995	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		996	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		997	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		998	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		999	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1000	const_iv (FIEMAP_EXTENT_MERGED)
		1001	const_iv (FIEMAP_EXTENT_SHARED)
		1002
		1003	const_iv (SPLICE_F_MOVE)
		1004	const_iv (SPLICE_F_NONBLOCK)
		1005	const_iv (SPLICE_F_MORE)
		1006	const_iv (SPLICE_F_GIFT)
		1007
		1008	const_iv (SEEK_DATA)
		1009	const_iv (SEEK_HOLE)
		1010
		1011	/* libeio constants */
		1012	const_eio (SEEK_SET)
		1013	const_eio (SEEK_CUR)
		1014	const_eio (SEEK_END)
		1015
		1016	const_eio (MCL_FUTURE)
		1017	const_eio (MCL_CURRENT)
		1018
		1019	const_eio (MS_ASYNC)
		1020	const_eio (MS_INVALIDATE)
		1021	const_eio (MS_SYNC)
		1022
		1023	const_eio (MT_MODIFY)
		1024
		1025	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1026	const_eio (SYNC_FILE_RANGE_WRITE)
		1027	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1028
		1029	const_eio (FALLOC_FL_KEEP_SIZE)
		1030	const_eio (FALLOC_FL_PUNCH_HOLE)
		1031
		1032	const_eio (READDIR_DENTS)
		1033	const_eio (READDIR_DIRS_FIRST)
		1034	const_eio (READDIR_STAT_ORDER)
		1035	const_eio (READDIR_FOUND_UNKNOWN)
		1036
		1037	const_eio (DT_UNKNOWN)
		1038	const_eio (DT_FIFO)
		1039	const_eio (DT_CHR)
		1040	const_eio (DT_DIR)
		1041	const_eio (DT_BLK)
		1042	const_eio (DT_REG)
		1043	const_eio (DT_LNK)
		1044	const_eio (DT_SOCK)
		1045	const_eio (DT_WHT)
		1046	};
		1047
1108	HV *stash = gv_stashpv ("IO::AIO", 1);	1048	aio_stash = gv_stashpv ("IO::AIO" , 1);
1109	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1049	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1110	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1050	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1111	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1051	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1112		1052
1113	create_pipe ();	1053	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1114	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1054	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1115	}
1116		1055
		1056	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1057
		1058	reinit ();
		1059	}
		1060
1117	void	1061	void
1118	min_parallel (int nthreads)	1062	reinit ()
1119	PROTOTYPE: $	1063	PROTOTYPE:
1120		1064
1121	void	1065	void
1122	max_parallel (int nthreads)	1066	max_poll_reqs (unsigned int nreqs)
1123	PROTOTYPE: $
1124
1125	int
1126	max_outstanding (int maxreqs)
1127	PROTOTYPE: $	1067	PROTOTYPE: $
1128	CODE:	1068	CODE:
1129	RETVAL = max_outstanding;	1069	eio_set_max_poll_reqs (nreqs);
		1070
		1071	void
		1072	max_poll_time (double nseconds)
		1073	PROTOTYPE: $
		1074	CODE:
		1075	eio_set_max_poll_time (nseconds);
		1076
		1077	void
		1078	min_parallel (unsigned int nthreads)
		1079	PROTOTYPE: $
		1080	CODE:
		1081	eio_set_min_parallel (nthreads);
		1082
		1083	void
		1084	max_parallel (unsigned int nthreads)
		1085	PROTOTYPE: $
		1086	CODE:
		1087	eio_set_max_parallel (nthreads);
		1088
		1089	void
		1090	max_idle (unsigned int nthreads)
		1091	PROTOTYPE: $
		1092	CODE:
		1093	eio_set_max_idle (nthreads);
		1094
		1095	void
		1096	idle_timeout (unsigned int seconds)
		1097	PROTOTYPE: $
		1098	CODE:
		1099	eio_set_idle_timeout (seconds);
		1100
		1101	void
		1102	max_outstanding (unsigned int maxreqs)
		1103	PROTOTYPE: $
		1104	CODE:
1130	max_outstanding = maxreqs;	1105	max_outstanding = maxreqs;
1131	OUTPUT:
1132	RETVAL
1133		1106
1134	void	1107	void
1135	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1108	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1136	SV * pathname
1137	int flags
1138	int mode
1139	SV * callback
1140	PROTOTYPE: $$$;$
1141	PPCODE:	1109	PPCODE:
1142	{	1110	{
1143	dREQ;	1111	dREQ;
1144		1112
1145	req->type = REQ_OPEN;	1113	req->type = EIO_WD_OPEN;
1146	req->data = newSVsv (pathname);	1114	req_set_path1 (req, pathname);
1147	req->dataptr = SvPVbyte_nolen (req->data);
1148	req->fd = flags;
1149	req->mode = mode;
1150		1115
1151	REQ_SEND;	1116	REQ_SEND;
1152	}	1117	}
1153		1118
1154	void	1119	void
		1120	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1121	PPCODE:
		1122	{
		1123	dREQ;
		1124
		1125	req->type = EIO_OPEN;
		1126	req_set_path1 (req, pathname);
		1127	req->int1 = flags;
		1128	req->int2 = mode;
		1129
		1130	REQ_SEND;
		1131	}
		1132
		1133	void
1155	aio_close (fh,callback=&PL_sv_undef)	1134	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1156	SV * fh
1157	SV * callback
1158	PROTOTYPE: $;$
1159	ALIAS:	1135	ALIAS:
1160	aio_close = REQ_CLOSE
1161	aio_fsync = REQ_FSYNC	1136	aio_fsync = EIO_FSYNC
1162	aio_fdatasync = REQ_FDATASYNC	1137	aio_fdatasync = EIO_FDATASYNC
		1138	aio_syncfs = EIO_SYNCFS
1163	PPCODE:	1139	PPCODE:
1164	{	1140	{
		1141	int fd = s_fileno_croak (fh, 0);
1165	dREQ;	1142	dREQ;
1166		1143
1167	req->type = ix;	1144	req->type = ix;
1168	req->fh = newSVsv (fh);	1145	req->sv1 = newSVsv (fh);
1169	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1146	req->int1 = fd;
1170		1147
1171	REQ_SEND (req);	1148	REQ_SEND;
1172	}	1149	}
1173		1150
1174	void	1151	void
		1152	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1153	PPCODE:
		1154	{
		1155	int fd = s_fileno_croak (fh, 0);
		1156	dREQ;
		1157
		1158	req->type = EIO_SYNC_FILE_RANGE;
		1159	req->sv1 = newSVsv (fh);
		1160	req->int1 = fd;
		1161	req->offs = offset;
		1162	req->size = nbytes;
		1163	req->int2 = flags;
		1164
		1165	REQ_SEND;
		1166	}
		1167
		1168	void
		1169	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1170	PPCODE:
		1171	{
		1172	int fd = s_fileno_croak (fh, 0);
		1173	dREQ;
		1174
		1175	req->type = EIO_FALLOCATE;
		1176	req->sv1 = newSVsv (fh);
		1177	req->int1 = fd;
		1178	req->int2 = mode;
		1179	req->offs = offset;
		1180	req->size = len;
		1181
		1182	REQ_SEND;
		1183	}
		1184
		1185	void
		1186	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1187	PPCODE:
		1188	{
		1189	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1190	int fd = s_fileno_croak (fh, 0);
		1191	dREQ;
		1192
		1193	if (expect_false (close_fd < 0))
		1194	{
		1195	int pipefd [2];
		1196
		1197	if (
		1198	#ifdef _WIN32
		1199	_pipe (pipefd, 1, _O_BINARY) < 0
		1200	#else
		1201	pipe (pipefd) < 0
		1202	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1203	#endif
		1204	|| close (pipefd [1]) < 0
		1205	)
		1206	abort (); /*D*/
		1207
		1208	close_fd = pipefd [0];
		1209	}
		1210
		1211	req->type = EIO_DUP2;
		1212	req->int1 = close_fd;
		1213	req->sv2 = newSVsv (fh);
		1214	req->int2 = fd;
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
		1220	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1221	PPCODE:
		1222	{
		1223	int fd = s_fileno_croak (fh, 0);
		1224	dREQ;
		1225
		1226	req->type = EIO_SEEK;
		1227	req->sv1 = newSVsv (fh);
		1228	req->int1 = fd;
		1229	req->offs = SvVAL64 (offset);
		1230	req->int2 = whence;
		1231
		1232	REQ_SEND;
		1233	}
		1234
		1235	void
1175	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1236	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	UV length
1179	SV * data
1180	UV dataoffset
1181	SV * callback
1182	ALIAS:	1237	ALIAS:
1183	aio_read = REQ_READ	1238	aio_read = EIO_READ
1184	aio_write = REQ_WRITE	1239	aio_write = EIO_WRITE
1185	PROTOTYPE: $$$$$;$
1186	PPCODE:	1240	PPCODE:
1187	{	1241	{
1188	aio_req req;
1189	STRLEN svlen;	1242	STRLEN svlen;
		1243	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1190	char *svptr = SvPVbyte (data, svlen);	1244	char *svptr = SvPVbyte (data, svlen);
1191		1245	UV len = SvUV (length);
1192	SvUPGRADE (data, SVt_PV);
1193	SvPOK_on (data);
1194		1246
1195	if (dataoffset < 0)	1247	if (dataoffset < 0)
1196	dataoffset += svlen;	1248	dataoffset += svlen;
1197		1249
1198	if (dataoffset < 0 || dataoffset > svlen)	1250	if (dataoffset < 0 || dataoffset > svlen)
1199	croak ("data offset outside of string");	1251	croak ("dataoffset outside of data scalar");
1200		1252
1201	if (ix == REQ_WRITE)	1253	if (ix == EIO_WRITE)
1202	{	1254	{
1203	/* write: check length and adjust. */	1255	/* write: check length and adjust. */
1204	if (length < 0 || length + dataoffset > svlen)	1256	if (!SvOK (length) || len + dataoffset > svlen)
1205	length = svlen - dataoffset;	1257	len = svlen - dataoffset;
1206	}	1258	}
1207	else	1259	else
1208	{	1260	{
1209	/* read: grow scalar as necessary */	1261	/* read: check type and grow scalar as necessary */
		1262	SvUPGRADE (data, SVt_PV);
		1263	if (SvLEN (data) >= SvCUR (data))
1210	svptr = SvGROW (data, length + dataoffset);	1264	svptr = SvGROW (data, len + dataoffset + 1);
		1265	else if (SvCUR (data) < len + dataoffset)
		1266	croak ("length + dataoffset outside of scalar, and cannot grow");
1211	}	1267	}
1212
1213	if (length < 0)
1214	croak ("length must not be negative");
1215		1268
1216	{	1269	{
1217	dREQ;	1270	dREQ;
1218		1271
1219	req->type = ix;	1272	req->type = ix;
1220	req->fh = newSVsv (fh);	1273	req->sv1 = newSVsv (fh);
1221	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1274	req->int1 = fd;
1222	: IoOFP (sv_2io (fh)));	1275	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1223	req->offset = offset;	1276	req->size = len;
1224	req->length = length;
1225	req->data = SvREFCNT_inc (data);	1277	req->sv2 = SvREFCNT_inc (data);
1226	req->dataptr = (char *)svptr + dataoffset;	1278	req->ptr2 = (char *)svptr + dataoffset;
		1279	req->stroffset = dataoffset;
1227		1280
1228	if (!SvREADONLY (data))	1281	if (!SvREADONLY (data))
1229	{	1282	{
1230	SvREADONLY_on (data);	1283	SvREADONLY_on (data);
1231	req->data2ptr = (void *)data;	1284	req->flags |= FLAG_SV2_RO_OFF;
1232	}	1285	}
1233		1286
1234	REQ_SEND;	1287	REQ_SEND;
1235	}	1288	}
1236	}	1289	}
1237		1290
1238	void	1291	void
1239	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1292	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1240	SV * out_fh	1293	ALIAS:
1241	SV * in_fh	1294	aio_readlink = EIO_READLINK
1242	UV in_offset	1295	aio_realpath = EIO_REALPATH
1243	UV length
1244	SV * callback
1245	PROTOTYPE: $$$$;$
1246	PPCODE:	1296	PPCODE:
1247	{	1297	{
		1298	dREQ;
		1299
		1300	req->type = ix;
		1301	req_set_path1 (req, pathname);
		1302
		1303	REQ_SEND;
		1304	}
		1305
		1306	void
		1307	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1308	PPCODE:
		1309	{
		1310	int ifd = s_fileno_croak (in_fh , 0);
		1311	int ofd = s_fileno_croak (out_fh, 1);
1248	dREQ;	1312	dREQ;
1249		1313
1250	req->type = REQ_SENDFILE;	1314	req->type = EIO_SENDFILE;
1251	req->fh = newSVsv (out_fh);	1315	req->sv1 = newSVsv (out_fh);
1252	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1316	req->int1 = ofd;
1253	req->fh2 = newSVsv (in_fh);	1317	req->sv2 = newSVsv (in_fh);
1254	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1318	req->int2 = ifd;
1255	req->offset = in_offset;	1319	req->offs = in_offset;
1256	req->length = length;	1320	req->size = length;
1257		1321
1258	REQ_SEND;	1322	REQ_SEND;
1259	}	1323	}
1260		1324
1261	void	1325	void
1262	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1326	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1263	SV * fh
1264	UV offset
1265	IV length
1266	SV * callback
1267	PROTOTYPE: $$$;$
1268	PPCODE:	1327	PPCODE:
1269	{	1328	{
		1329	int fd = s_fileno_croak (fh, 0);
1270	dREQ;	1330	dREQ;
1271		1331
1272	req->type = REQ_READAHEAD;	1332	req->type = EIO_READAHEAD;
1273	req->fh = newSVsv (fh);	1333	req->sv1 = newSVsv (fh);
1274	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1334	req->int1 = fd;
1275	req->offset = offset;	1335	req->offs = offset;
1276	req->length = length;	1336	req->size = length;
1277		1337
1278	REQ_SEND;	1338	REQ_SEND;
1279	}	1339	}
1280		1340
1281	void	1341	void
1282	aio_stat (fh_or_path,callback=&PL_sv_undef)	1342	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1283	SV * fh_or_path
1284	SV * callback
1285	ALIAS:	1343	ALIAS:
1286	aio_stat = REQ_STAT	1344	aio_stat = EIO_STAT
1287	aio_lstat = REQ_LSTAT	1345	aio_lstat = EIO_LSTAT
		1346	aio_statvfs = EIO_STATVFS
1288	PPCODE:	1347	PPCODE:
1289	{	1348	{
1290	dREQ;	1349	dREQ;
1291		1350
1292	New (0, req->statdata, 1, Stat_t);	1351	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1293	if (!req->statdata)
1294	{
1295	req_free (req);
1296	croak ("out of memory during aio_req->statdata allocation");
1297	}
1298
1299	if (SvPOK (fh_or_path))
1300	{
1301	req->type = ix;
1302	req->data = newSVsv (fh_or_path);
1303	req->dataptr = SvPVbyte_nolen (req->data);
1304	}
1305	else
1306	{
1307	req->type = REQ_FSTAT;
1308	req->fh = newSVsv (fh_or_path);
1309	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1310	}
1311		1352
1312	REQ_SEND;	1353	REQ_SEND;
1313	}	1354	}
1314		1355
		1356	UV
		1357	major (UV dev)
		1358	ALIAS:
		1359	minor = 1
		1360	CODE:
		1361	RETVAL = ix ? major (dev) : minor (dev);
		1362	OUTPUT:
		1363	RETVAL
		1364
		1365	UV
		1366	makedev (UV maj, UV min)
		1367	CODE:
		1368	RETVAL = makedev (maj, min);
		1369	OUTPUT:
		1370	RETVAL
		1371
1315	void	1372	void
		1373	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1379	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1380	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1381
		1382	REQ_SEND;
		1383	}
		1384
		1385	void
		1386	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1387	PPCODE:
		1388	{
		1389	dREQ;
		1390
		1391	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1392	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1399	PPCODE:
		1400	{
		1401	dREQ;
		1402
		1403	req->int2 = mode;
		1404	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1405
		1406	REQ_SEND;
		1407	}
		1408
		1409	void
		1410	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1411	PPCODE:
		1412	{
		1413	dREQ;
		1414
		1415	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1416	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1417	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1418
		1419	REQ_SEND;
		1420	}
		1421
		1422	void
		1423	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1424	PPCODE:
		1425	{
		1426	dREQ;
		1427
		1428	req->type = EIO_READDIR;
		1429	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1430
		1431	if (flags & EIO_READDIR_DENTS)
		1432	req->int1 |= EIO_READDIR_CUSTOM2;
		1433
		1434	req_set_path1 (req, pathname);
		1435
		1436	REQ_SEND;
		1437	}
		1438
		1439	void
		1440	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = EIO_MKDIR;
		1446	req->int2 = mode;
		1447	req_set_path1 (req, pathname);
		1448
		1449	REQ_SEND;
		1450	}
		1451
		1452	void
1316	aio_unlink (pathname,callback=&PL_sv_undef)	1453	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1317	SV * pathname
1318	SV * callback
1319	ALIAS:	1454	ALIAS:
1320	aio_unlink = REQ_UNLINK	1455	aio_unlink = EIO_UNLINK
1321	aio_rmdir = REQ_RMDIR	1456	aio_rmdir = EIO_RMDIR
1322	aio_readdir = REQ_READDIR	1457	aio_readdir = EIO_READDIR
1323	PPCODE:	1458	PPCODE:
1324	{	1459	{
1325	dREQ;	1460	dREQ;
1326		1461
1327	req->type = ix;	1462	req->type = ix;
1328	req->data = newSVsv (pathname);	1463	req_set_path1 (req, pathname);
1329	req->dataptr = SvPVbyte_nolen (req->data);	1464
1330
1331	REQ_SEND;	1465	REQ_SEND;
1332	}	1466	}
1333		1467
1334	void	1468	void
1335	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1469	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1336	SV * oldpath
1337	SV * newpath
1338	SV * callback
1339	ALIAS:	1470	ALIAS:
1340	aio_link = REQ_LINK	1471	aio_link = EIO_LINK
1341	aio_symlink = REQ_SYMLINK	1472	aio_symlink = EIO_SYMLINK
1342	aio_rename = REQ_RENAME	1473	aio_rename = EIO_RENAME
1343	PPCODE:	1474	PPCODE:
1344	{	1475	{
		1476	eio_wd wd2 = 0;
1345	dREQ;	1477	dREQ;
1346		1478
1347	req->type = ix;	1479	req->type = ix;
1348	req->fh = newSVsv (oldpath);	1480	req_set_path1 (req, oldpath);
1349	req->data2ptr = SvPVbyte_nolen (req->fh);	1481	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1350	req->data = newSVsv (newpath);	1482	req->int3 = (long)wd2;
1351	req->dataptr = SvPVbyte_nolen (req->data);
1352		1483
1353	REQ_SEND;	1484	REQ_SEND;
1354	}	1485	}
1355		1486
1356	void	1487	void
1357	aio_busy (delay,callback=&PL_sv_undef)	1488	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1358	double delay
1359	SV * callback
1360	PPCODE:	1489	PPCODE:
1361	{	1490	{
1362	dREQ;	1491	dREQ;
1363		1492
1364	req->type = REQ_BUSY;	1493	req->type = EIO_MKNOD;
1365	req->fd = delay < 0. ? 0 : delay;	1494	req->int2 = (mode_t)mode;
1366	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1495	req->offs = dev;
1367		1496	req_set_path1 (req, pathname);
		1497
1368	REQ_SEND;	1498	REQ_SEND;
1369	}	1499	}
1370		1500
1371	void	1501	void
1372	aio_group (callback=&PL_sv_undef)	1502	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1373	SV * callback	1503	ALIAS:
1374	PROTOTYPE: ;$	1504	aio_mtouch = EIO_MTOUCH
		1505	aio_msync = EIO_MSYNC
1375	PPCODE:	1506	PPCODE:
1376	{	1507	{
		1508	STRLEN svlen;
		1509	char *svptr = SvPVbyte (data, svlen);
		1510	UV len = SvUV (length);
		1511
		1512	if (offset < 0)
		1513	offset += svlen;
		1514
		1515	if (offset < 0 || offset > svlen)
		1516	croak ("offset outside of scalar");
		1517
		1518	if (!SvOK (length) || len + offset > svlen)
		1519	len = svlen - offset;
		1520
		1521	{
		1522	dREQ;
		1523
		1524	req->type = ix;
		1525	req->sv2 = SvREFCNT_inc (data);
		1526	req->ptr2 = (char *)svptr + offset;
		1527	req->size = len;
		1528	req->int1 = flags;
		1529
		1530	REQ_SEND;
		1531	}
		1532	}
		1533
		1534	void
		1535	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	STRLEN svlen;
		1539	char *svptr = SvPVbyte (data, svlen);
		1540	UV len = SvUV (length);
		1541
		1542	if (offset < 0)
		1543	offset += svlen;
		1544
		1545	if (offset < 0 || offset > svlen)
		1546	croak ("offset outside of scalar");
		1547
		1548	if (!SvOK (length) || len + offset > svlen)
		1549	len = svlen - offset;
		1550
		1551	{
		1552	dREQ;
		1553
		1554	req->type = EIO_MLOCK;
		1555	req->sv2 = SvREFCNT_inc (data);
		1556	req->ptr2 = (char *)svptr + offset;
		1557	req->size = len;
		1558
		1559	REQ_SEND;
		1560	}
		1561	}
		1562
		1563	void
		1564	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1565	PPCODE:
		1566	{
		1567	dREQ;
		1568
		1569	req->type = EIO_MLOCKALL;
		1570	req->int1 = flags;
		1571
		1572	REQ_SEND;
		1573	}
		1574
		1575	void
		1576	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1577	PPCODE:
		1578	{
		1579	int fd = s_fileno_croak (fh, 0);
1377	dREQ;	1580	dREQ;
1378		1581
1379	req->type = REQ_GROUP;	1582	req->type = EIO_CUSTOM;
1380	req_send (req);	1583	req->sv1 = newSVsv (fh);
		1584	req->int1 = fd;
1381		1585
1382	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1586	req->feed = fiemap;
1383	}	1587	#if HAVE_FIEMAP
		1588	/* keep our fingers crossed that the next two types are 64 bit */
		1589	req->offs = start;
		1590	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1591	req->int2 = flags;
		1592	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1593	#endif
1384		1594
		1595	REQ_SEND;
		1596	}
		1597
1385	void	1598	void
1386	aio_nop (callback=&PL_sv_undef)	1599	aio_busy (double delay, SV *callback=&PL_sv_undef)
1387	SV * callback
1388	PPCODE:	1600	PPCODE:
1389	{	1601	{
1390	dREQ;	1602	dREQ;
1391		1603
1392	req->type = REQ_NOP;	1604	req->type = EIO_BUSY;
		1605	req->nv1 = delay < 0. ? 0. : delay;
1393		1606
1394	REQ_SEND;	1607	REQ_SEND;
1395	}	1608	}
1396		1609
1397	void	1610	void
1398	aioreq_pri (int pri = DEFAULT_PRI)	1611	aio_group (SV *callback=&PL_sv_undef)
1399	CODE:	1612	PPCODE:
		1613	{
		1614	dREQ;
		1615
		1616	req->type = EIO_GROUP;
		1617
		1618	req_submit (req);
		1619	XPUSHs (req_sv (req, aio_grp_stash));
		1620	}
		1621
		1622	void
		1623	aio_nop (SV *callback=&PL_sv_undef)
		1624	ALIAS:
		1625	aio_nop = EIO_NOP
		1626	aio_sync = EIO_SYNC
		1627	PPCODE:
		1628	{
		1629	dREQ;
		1630
		1631	req->type = ix;
		1632
		1633	REQ_SEND;
		1634	}
		1635
		1636	int
		1637	aioreq_pri (int pri = 0)
		1638	CODE:
		1639	RETVAL = next_pri;
		1640	if (items > 0)
		1641	{
1400	if (pri < PRI_MIN) pri = PRI_MIN;	1642	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1401	if (pri > PRI_MAX) pri = PRI_MAX;	1643	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1402	next_pri = pri + PRI_BIAS;	1644	next_pri = pri;
		1645	}
		1646	OUTPUT:
		1647	RETVAL
1403		1648
1404	void	1649	void
1405	aioreq_nice (int nice = 0)	1650	aioreq_nice (int nice = 0)
1406	CODE:	1651	CODE:
1407	nice = next_pri - nice;	1652	nice = next_pri - nice;
1408	if (nice < PRI_MIN) nice = PRI_MIN;	1653	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1409	if (nice > PRI_MAX) nice = PRI_MAX;	1654	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1410	next_pri = nice + PRI_BIAS;	1655	next_pri = nice;
1411		1656
1412	void	1657	void
1413	flush ()	1658	flush ()
		1659	CODE:
		1660	while (eio_nreqs ())
		1661	{
		1662	poll_wait ();
		1663	poll_cb ();
		1664	}
		1665
		1666	int
		1667	poll ()
		1668	CODE:
		1669	poll_wait ();
		1670	RETVAL = poll_cb ();
		1671	OUTPUT:
		1672	RETVAL
		1673
		1674	int
		1675	poll_fileno ()
		1676	CODE:
		1677	RETVAL = s_epipe_fd (&respipe);
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	int
		1682	poll_cb (...)
1414	PROTOTYPE:	1683	PROTOTYPE:
1415	CODE:	1684	CODE:
1416	while (nreqs)
1417	{
1418	poll_wait ();
1419	poll_cb (0);	1685	RETVAL = poll_cb ();
1420	}
1421
1422	void
1423	poll()
1424	PROTOTYPE:
1425	CODE:
1426	if (nreqs)
1427	{
1428	poll_wait ();
1429	poll_cb (0);
1430	}
1431
1432	int
1433	poll_fileno()
1434	PROTOTYPE:
1435	CODE:
1436	RETVAL = respipe [0];
1437	OUTPUT:	1686	OUTPUT:
1438	RETVAL	1687	RETVAL
1439		1688
		1689	void
		1690	poll_wait ()
		1691	CODE:
		1692	poll_wait ();
		1693
1440	int	1694	int
1441	poll_cb(...)	1695	nreqs ()
1442	PROTOTYPE:
1443	CODE:	1696	CODE:
1444	RETVAL = poll_cb (0);	1697	RETVAL = eio_nreqs ();
1445	OUTPUT:	1698	OUTPUT:
1446	RETVAL	1699	RETVAL
1447		1700
1448	int	1701	int
1449	poll_some(int max = 0)	1702	nready ()
1450	PROTOTYPE: $
1451	CODE:	1703	CODE:
1452	RETVAL = poll_cb (max);	1704	RETVAL = eio_nready ();
1453	OUTPUT:	1705	OUTPUT:
1454	RETVAL	1706	RETVAL
1455		1707
1456	void	1708	int
1457	poll_wait()	1709	npending ()
1458	PROTOTYPE:
1459	CODE:	1710	CODE:
1460	if (nreqs)	1711	RETVAL = eio_npending ();
1461	poll_wait ();
1462
1463	int
1464	nreqs()
1465	PROTOTYPE:
1466	CODE:
1467	RETVAL = nreqs;
1468	OUTPUT:	1712	OUTPUT:
1469	RETVAL	1713	RETVAL
1470		1714
		1715	int
		1716	nthreads ()
		1717	CODE:
		1718	RETVAL = eio_nthreads ();
		1719	OUTPUT:
		1720	RETVAL
		1721
		1722	int
		1723	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1724	CODE:
		1725	RETVAL = posix_fadvise (fh, offset, length, advice);
		1726	OUTPUT:
		1727	RETVAL
		1728
		1729	IV
		1730	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1731	CODE:
		1732	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void
		1737	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1738	PPCODE:
		1739	sv_unmagic (scalar, MMAP_MAGIC);
		1740	{
		1741	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1742	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1743	if (addr == (void *)-1)
		1744	XSRETURN_NO;
		1745
		1746	sv_force_normal (scalar);
		1747
		1748	/* we store the length in mg_obj, as namlen is I32 :/ */
		1749	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1750	->mg_obj = (SV *)length;
		1751
		1752	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1753
		1754	if (!(prot & PROT_WRITE))
		1755	SvREADONLY_on (scalar);
		1756
		1757	if (SvLEN (scalar))
		1758	Safefree (SvPVX (scalar));
		1759
		1760	SvPVX (scalar) = (char *)addr;
		1761	SvCUR_set (scalar, length);
		1762	SvLEN_set (scalar, 0);
		1763	SvPOK_only (scalar);
		1764
		1765	XSRETURN_YES;
		1766	}
		1767
		1768	void
		1769	munmap (SV *scalar)
		1770	CODE:
		1771	sv_unmagic (scalar, MMAP_MAGIC);
		1772
		1773	int
		1774	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1775	ALIAS:
		1776	mprotect = 1
		1777	CODE:
		1778	{
		1779	STRLEN svlen;
		1780	void *addr = SvPVbyte (scalar, svlen);
		1781	size_t len = SvUV (length);
		1782
		1783	if (offset < 0)
		1784	offset += svlen;
		1785
		1786	if (offset < 0 || offset > svlen)
		1787	croak ("offset outside of scalar");
		1788
		1789	if (!SvOK (length) || len + offset > svlen)
		1790	len = svlen - offset;
		1791
		1792	addr = (void *)(((intptr_t)addr) + offset);
		1793	eio_page_align (&addr, &len);
		1794
		1795	switch (ix)
		1796	{
		1797	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1798	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1799	}
		1800	}
		1801	OUTPUT:
		1802	RETVAL
		1803
		1804	int
		1805	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1806	CODE:
		1807	{
		1808	STRLEN svlen;
		1809	void *addr = SvPVbyte (scalar, svlen);
		1810	size_t len = SvUV (length);
		1811
		1812	if (offset < 0)
		1813	offset += svlen;
		1814
		1815	if (offset < 0 || offset > svlen)
		1816	croak ("offset outside of scalar");
		1817
		1818	if (!SvOK (length) || len + offset > svlen)
		1819	len = svlen - offset;
		1820
		1821	addr = (void *)(((intptr_t)addr) + offset);
		1822	eio_page_align (&addr, &len);
		1823	#if _POSIX_MEMLOCK_RANGE
		1824	RETVAL = munlock (addr, len);
		1825	#else
		1826	RETVAL = EIO_ENOSYS ();
		1827	#endif
		1828	}
		1829	OUTPUT:
		1830	RETVAL
		1831
		1832	int
		1833	munlockall ()
		1834	CODE:
		1835	#if _POSIX_MEMLOCK
		1836	munlockall ();
		1837	#else
		1838	RETVAL = EIO_ENOSYS ();
		1839	#endif
		1840	OUTPUT:
		1841	RETVAL
		1842
		1843	int
		1844	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1845	CODE:
		1846	{
		1847	#if HAVE_LINUX_SPLICE
		1848	loff_t off_in_, off_out_;
		1849	RETVAL = splice (
		1850	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1851	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1852	length, flags
		1853	);
		1854	#else
		1855	RETVAL = EIO_ENOSYS ();
		1856	#endif
		1857	}
		1858	OUTPUT:
		1859	RETVAL
		1860
		1861	int
		1862	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1863	CODE:
		1864	#if HAVE_LINUX_SPLICE
		1865	RETVAL = tee (rfh, wfh, length, flags);
		1866	#else
		1867	RETVAL = EIO_ENOSYS ();
		1868	#endif
		1869	OUTPUT:
		1870	RETVAL
		1871
		1872	void _on_next_submit (SV *cb)
		1873	CODE:
		1874	SvREFCNT_dec (on_next_submit);
		1875	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1876
1471	PROTOTYPES: DISABLE	1877	PROTOTYPES: DISABLE
		1878
		1879	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1880
		1881	BOOT:
		1882	{
		1883	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1884	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1885	}
		1886
		1887	void
		1888	DESTROY (SV *self)
		1889	CODE:
		1890	{
		1891	aio_wd wd = SvAIO_WD (self);
		1892	#if HAVE_AT
		1893	{
		1894	SV *callback = &PL_sv_undef;
		1895	dREQ; /* clobbers next_pri :/ */
		1896	next_pri = req->pri; /* restore next_pri */
		1897	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1898	req->type = EIO_WD_CLOSE;
		1899	req->wd = wd;
		1900	REQ_SEND;
		1901	}
		1902	#else
		1903	eio_wd_close_sync (wd);
		1904	#endif
		1905	}
1472		1906
1473	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1907	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1474		1908
1475	void	1909	void
1476	cancel (aio_req_ornot req)	1910	cancel (aio_req_ornot req)
1477	CODE:	1911	CODE:
1478	req_cancel (req);	1912	eio_cancel (req);
1479		1913
1480	void	1914	void
1481	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1915	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1482	CODE:	1916	PPCODE:
		1917	{
		1918	if (GIMME_V != G_VOID)
		1919	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1920
		1921	if (items > 1)
		1922	{
		1923	SV *cb_cv =get_cb (callback);
		1924
1483	SvREFCNT_dec (req->callback);	1925	SvREFCNT_dec (req->callback);
1484	req->callback = newSVsv (callback);	1926	req->callback = SvREFCNT_inc (cb_cv);
		1927	}
		1928	}
1485		1929
1486	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1930	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1487		1931
1488	void	1932	void
1489	add (aio_req grp, ...)	1933	add (aio_req grp, ...)
1490	PPCODE:	1934	PPCODE:
1491	{	1935	{
1492	int i;	1936	int i;
1493	aio_req req;
1494		1937
1495	if (grp->fd == 2)	1938	if (grp->int1 == 2)
1496	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1939	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1497		1940
1498	for (i = 1; i < items; ++i )	1941	for (i = 1; i < items; ++i )
1499	{	1942	{
		1943	aio_req req;
		1944
1500	if (GIMME_V != G_VOID)	1945	if (GIMME_V != G_VOID)
1501	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1946	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1502		1947
1503	req = SvAIO_REQ (ST (i));	1948	req = SvAIO_REQ (ST (i));
1504		1949
1505	if (req)	1950	if (req)
1506	{	1951	eio_grp_add (grp, req);
1507	++grp->length;
1508	req->grp = grp;
1509
1510	req->grp_prev = 0;
1511	req->grp_next = grp->grp_first;
1512
1513	if (grp->grp_first)
1514	grp->grp_first->grp_prev = req;
1515
1516	grp->grp_first = req;
1517	}
1518	}	1952	}
1519	}	1953	}
1520		1954
1521	void	1955	void
1522	cancel_subs (aio_req_ornot req)	1956	cancel_subs (aio_req_ornot req)
…		…
1526	void	1960	void
1527	result (aio_req grp, ...)	1961	result (aio_req grp, ...)
1528	CODE:	1962	CODE:
1529	{	1963	{
1530	int i;	1964	int i;
		1965	AV *av;
		1966
		1967	grp->errorno = errno;
		1968
1531	AV *av = newAV ();	1969	av = newAV ();
		1970	av_extend (av, items - 1);
1532		1971
1533	for (i = 1; i < items; ++i )	1972	for (i = 1; i < items; ++i )
1534	av_push (av, newSVsv (ST (i)));	1973	av_push (av, newSVsv (ST (i)));
1535		1974
1536	SvREFCNT_dec (grp->data);	1975	SvREFCNT_dec (grp->sv1);
1537	grp->data = (SV *)av;	1976	grp->sv1 = (SV *)av;
1538	}	1977	}
		1978
		1979	void
		1980	errno (aio_req grp, int errorno = errno)
		1981	CODE:
		1982	grp->errorno = errorno;
1539		1983
1540	void	1984	void
1541	limit (aio_req grp, int limit)	1985	limit (aio_req grp, int limit)
1542	CODE:	1986	CODE:
1543	grp->fd2 = limit;	1987	eio_grp_limit (grp, limit);
1544	aio_grp_feed (grp);
1545		1988
1546	void	1989	void
1547	feed (aio_req grp, SV *callback=&PL_sv_undef)	1990	feed (aio_req grp, SV *callback=&PL_sv_undef)
1548	CODE:	1991	CODE:
1549	{	1992	{
1550	SvREFCNT_dec (grp->fh2);	1993	SvREFCNT_dec (grp->sv2);
1551	grp->fh2 = newSVsv (callback);	1994	grp->sv2 = newSVsv (callback);
		1995	grp->feed = aio_grp_feed;
1552		1996
1553	if (grp->fd2 <= 0)	1997	if (grp->int2 <= 0)
1554	grp->fd2 = 2;	1998	grp->int2 = 2;
1555		1999
1556	aio_grp_feed (grp);	2000	eio_grp_limit (grp, grp->int2);
1557	}	2001	}
1558		2002

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