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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC vs.
Revision 1.228 by root, Fri Jan 24 23:46:16 2014 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
		21	# include <sys/mman.h>
		22	#endif
		23
33	# 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>
34	# include <sys/sendfile.h>	82	#include <sys/select.h>
35	# elif __freebsd	83	#include <unistd.h>
36	# include <sys/socket.h>	84	#include <utime.h>
37	# include <sys/uio.h>	85	#include <signal.h>
38	# elif __hpux	86
39	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
40	# elif __solaris /* not yet */	88
41	# 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
42	# else	140	# else
43	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	142	# endif
45	#endif	143	#endif
46		144
47	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
48	#ifndef NAME_MAX	146	#include "def0.h"
49	# define NAME_MAX 4096
50	#endif
51		147
52	#ifndef PTHREAD_STACK_MIN	148	#ifndef makedev
53	/* care for broken platforms, e.g. windows */	149	# define makedev(maj,min) (((maj) << 8) | (min))
54	# define PTHREAD_STACK_MIN 16384
55	#endif	150	#endif
56		151	#ifndef major
57	#if __ia64	152	# define major(dev) ((dev) >> 8)
58	# define STACKSIZE 65536
59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
60	# define STACKSIZE PTHREAD_STACK_MIN
61	#else
62	# define STACKSIZE 16384
63	#endif	153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
64		157
65	/* buffer size for various temporary buffers */	158	#if PAGESIZE <= 0
66	#define AIO_BUFSIZE 65536	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
67		161
68	#define dBUF \	162	/*****************************************************************************/
69	char *aio_buf; \	163
70	LOCK (wrklock); \	164	static void
71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	165	fiemap (eio_req *req)
72	UNLOCK (wrklock); \	166	{
73	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)
74	return -1;	185	return;
75		186
76	enum {	187	req->ptr1 = fiemap;
77	REQ_QUIT,
78	REQ_OPEN, REQ_CLOSE,
79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
80	REQ_SENDFILE,
81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
82	REQ_FSYNC, REQ_FDATASYNC,
83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
84	REQ_READDIR,
85	REQ_LINK, REQ_SYMLINK,
86	REQ_GROUP, REQ_NOP,
87	REQ_BUSY,
88	};
89		188
90	#define AIO_REQ_KLASS "IO::AIO::REQ"	189	fiemap->fm_start = req->offs;
91	#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;
92		193
93	typedef struct aio_cb	194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
94	{	195	return;
95	struct aio_cb *volatile next;
96		196
97	SV *data, *callback;	197	if (req->int3 >= 0 /* not autosizing */
98	SV *fh, *fh2;	198	|| !fiemap->fm_mapped_extents /* no more extents */
99	void *dataptr, *data2ptr;	199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
100	Stat_t *statdata;	200	goto done;
101	off_t offset;
102	size_t length;
103	ssize_t result;
104		201
105	STRLEN dataoffset;	202	/* else we have to loop -
106	int type;	203	* it would be tempting (actually I tried that first) to just query the
107	int fd, fd2;	204	* number of extents needed, but linux often feels like not returning all
108	int errorno;	205	* extents, without telling us it left any out. this complicates
109	mode_t mode; /* open */	206	* this quite a bit.
		207	*/
110		208
111	unsigned char flags;	209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
112	unsigned char pri;
113		210
114	SV *self; /* the perl counterpart of this request, if any */	211	for (;;)
115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
116	} aio_cb;
117
118	enum {
119	FLAG_CANCELLED = 0x01,
120	};
121
122	typedef aio_cb *aio_req;
123	typedef aio_cb *aio_req_ornot;
124
125	enum {
126	PRI_MIN = -4,
127	PRI_MAX = 4,
128
129	DEFAULT_PRI = 0,
130	PRI_BIAS = -PRI_MIN,
131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
132	};
133
134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
135
136	static int started, wanted;
137	static volatile int nreqs;
138	static int respipe [2];
139
140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
142	#else
143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
144	#endif
145
146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
148
149	/* worker threasd management */
150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
151
152	typedef struct worker {
153	/* locked by wrklock */
154	struct worker *prev, *next;
155
156	pthread_t tid;
157
158	/* locked by reslock, reqlock or wrklock */
159	aio_req req; /* currently processed request */
160	void *dbuf;
161	DIR *dirp;
162	} worker;
163
164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
165
166	static void worker_clear (worker *wrk)
167	{
168	if (wrk->dirp)
169	{	212	{
170	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) */
171	wrk->dirp = 0;	214	char scratch[3072];
172	}	215	struct fiemap *incmap = (struct fiemap *)scratch;
173		216
174	if (wrk->dbuf)	217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
175	{	218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
176	free (wrk->dbuf);	219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
177	wrk->dbuf = 0;	220	incmap->fm_flags = fiemap->fm_flags;
178	}	221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
179	}
180		222
181	static void worker_free (worker *wrk)	223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
182	{
183	wrk->next->prev = wrk->prev;
184	wrk->prev->next = wrk->next;
185
186	free (wrk);
187	}
188
189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
192
193	/*
194	* a somewhat faster data structure might be nice, but
195	* with 8 priorities this actually needs <20 insns
196	* per shift, the most expensive operation.
197	*/
198	typedef struct {
199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
200	int size;
201	} reqq;
202
203	static reqq req_queue;
204	static reqq res_queue;
205
206	int reqq_push (reqq *q, aio_req req)
207	{
208	int pri = req->pri;
209	req->next = 0;
210
211	if (q->qe[pri])
212	{
213	q->qe[pri]->next = req;
214	q->qe[pri] = req;
215	}
216	else
217	q->qe[pri] = q->qs[pri] = req;
218
219	return q->size++;
220	}
221
222	aio_req reqq_shift (reqq *q)
223	{
224	int pri;
225
226	if (!q->size)
227	return 0;	224	return;
228		225
229	--q->size;	226	if (!incmap->fm_mapped_extents)
		227	goto done;
230		228
231	for (pri = NUM_PRI; pri--; )	229	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
232	{	230	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
233	aio_req req = q->qs[pri];	231	errno = ENOMEM;
234
235	if (req)	232	if (!fiemap)
		233	return;
		234
		235	req->ptr1 = fiemap;
		236
		237	for (count = 0; count < incmap->fm_mapped_extents; ++count)
236	{	238	{
237	if (!(q->qs[pri] = req->next))	239	struct fiemap_extent *e = incmap->fm_extents + count;
238	q->qe[pri] = 0;
239		240
240	return req;	241	if (e->fe_logical + e->fe_length >= end_offset)
		242	goto done;
		243
		244	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		245
		246	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		247	goto done;
		248
241	}	249	}
242	}	250	}
243		251
244	abort ();	252	done:
245	}	253	req->result = 0;
246		254
247	static int poll_cb ();	255	#else
248	static void req_invoke (aio_req req);	256	errno = ENOSYS;
		257	#endif
		258	}
		259
		260	/*****************************************************************************/
		261
		262	enum {
		263	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		264	};
		265
		266	typedef eio_req *aio_req;
		267	typedef eio_req *aio_req_ornot;
		268	typedef eio_wd aio_wd;
		269
		270	static SV *on_next_submit;
		271	static int next_pri = EIO_PRI_DEFAULT;
		272	static int max_outstanding;
		273
		274	static s_epipe respipe;
		275
249	static void req_free (aio_req req);	276	static void req_destroy (aio_req req);
250	static void req_cancel (aio_req req);	277	static void req_cancel (aio_req req);
251		278
		279	static void
		280	want_poll (void)
		281	{
		282	/* write a dummy byte to the pipe so fh becomes ready */
		283	s_epipe_signal (&respipe);
		284	}
		285
		286	static void
		287	done_poll (void)
		288	{
		289	/* read any signals sent by the worker threads */
		290	s_epipe_drain (&respipe);
		291	}
		292
252	/* must be called at most once */	293	/* must be called at most once */
253	static SV *req_sv (aio_req req, const char *klass)	294	static SV *
		295	req_sv (aio_req req, HV *stash)
254	{	296	{
255	if (!req->self)	297	if (!req->self)
256	{	298	{
257	req->self = (SV *)newHV ();	299	req->self = (SV *)newHV ();
258	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	300	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
259	}	301	}
260		302
261	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	303	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
262	}	304	}
263		305
264	static aio_req SvAIO_REQ (SV *sv)	306	static SV *
		307	newSVaio_wd (aio_wd wd)
		308	{
		309	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		310	}
		311
		312	static aio_req
		313	SvAIO_REQ (SV *sv)
265	{	314	{
266	MAGIC *mg;	315	MAGIC *mg;
267		316
268	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	317	if (!SvROK (sv)
		318	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		319	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		320	&& SvSTASH (SvRV (sv)) != aio_req_stash
		321	&& !sv_derived_from (sv, "IO::AIO::REQ")))
269	croak ("object of class " AIO_REQ_KLASS " expected");	322	croak ("object of class IO::AIO::REQ expected");
270		323
271	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	324	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
272		325
273	return mg ? (aio_req)mg->mg_ptr : 0;	326	return mg ? (aio_req)mg->mg_ptr : 0;
274	}	327	}
275		328
		329	static aio_wd
		330	SvAIO_WD (SV *sv)
		331	{
		332	if (!SvROK (sv)
		333	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		334	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		335	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		336
		337	return (aio_wd)(long)SvIVX (SvRV (sv));
		338	}
		339
		340	static void
276	static void aio_grp_feed (aio_req grp)	341	aio_grp_feed (aio_req grp)
277	{	342	{
278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	343	if (grp->sv2 && SvOK (grp->sv2))
279	{	344	{
280	int old_len = grp->length;
281
282	if (grp->fh2 && SvOK (grp->fh2))
283	{
284	dSP;	345	dSP;
285		346
286	ENTER;	347	ENTER;
287	SAVETMPS;	348	SAVETMPS;
288	PUSHMARK (SP);	349	PUSHMARK (SP);
289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	350	XPUSHs (req_sv (grp, aio_grp_stash));
290	PUTBACK;	351	PUTBACK;
291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	352	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
292	SPAGAIN;	353	SPAGAIN;
293	FREETMPS;	354	FREETMPS;
294	LEAVE;	355	LEAVE;
295	}
296
297	/* stop if no progress has been made */
298	if (old_len == grp->length)
299	{
300	SvREFCNT_dec (grp->fh2);
301	grp->fh2 = 0;
302	break;
303	}
304	}	356	}
305	}	357	}
306		358
307	static void aio_grp_dec (aio_req grp)	359	static void
		360	req_submit (eio_req *req)
308	{	361	{
309	--grp->length;	362	eio_submit (req);
310		363
311	/* call feeder, if applicable */	364	if (expect_false (on_next_submit))
312	aio_grp_feed (grp);
313
314	/* finish, if done */
315	if (!grp->length && grp->fd)
316	{	365	{
317	req_invoke (grp);	366	dSP;
318	req_free (grp);	367	SV *cb = sv_2mortal (on_next_submit);
		368
		369	on_next_submit = 0;
		370
		371	PUSHMARK (SP);
		372	PUTBACK;
		373	call_sv (cb, G_DISCARD | G_EVAL);
319	}	374	}
320	}	375	}
321		376
322	static void poll_wait ()	377	static int
		378	req_invoke (eio_req *req)
323	{	379	{
324	fd_set rfd;	380	if (req->flags & FLAG_SV2_RO_OFF)
		381	SvREADONLY_off (req->sv2);
325		382
326	while (nreqs)	383	if (!EIO_CANCELLED (req) && req->callback)
327	{	384	{
328	int size;
329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
330	LOCK (reslock);
331	#endif
332	size = res_queue.size;
333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
334	UNLOCK (reslock);
335	#endif
336
337	if (size)
338	return;
339
340	FD_ZERO(&rfd);
341	FD_SET(respipe [0], &rfd);
342
343	select (respipe [0] + 1, &rfd, 0, 0, 0);
344	}
345	}
346
347	static void req_invoke (aio_req req)
348	{
349	dSP;	385	dSP;
350		386	static SV *sv_result_cache; /* caches the result integer SV */
351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	387	SV *sv_result;
352	{
353	errno = req->errorno;
354		388
355	ENTER;	389	ENTER;
356	SAVETMPS;	390	SAVETMPS;
357	PUSHMARK (SP);	391	PUSHMARK (SP);
358	EXTEND (SP, 1);	392	EXTEND (SP, 1);
359		393
		394	/* do not recreate the result IV from scratch each time */
		395	if (expect_true (sv_result_cache))
		396	{
		397	sv_result = sv_result_cache; sv_result_cache = 0;
		398	SvIV_set (sv_result, req->result);
		399	SvIOK_only (sv_result);
		400	}
		401	else
		402	{
		403	sv_result = newSViv (req->result);
		404	SvREADONLY_on (sv_result);
		405	}
		406
360	switch (req->type)	407	switch (req->type)
361	{	408	{
		409	case EIO_WD_OPEN:
		410	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		411	break;
		412
362	case REQ_READDIR:	413	case EIO_READDIR:
363	{	414	{
364	SV *rv = &PL_sv_undef;	415	SV *rv = &PL_sv_undef;
365		416
366	if (req->result >= 0)	417	if (req->result >= 0)
367	{	418	{
368	int i;	419	int i;
369	char *buf = req->data2ptr;	420	char *names = (char *)req->ptr2;
		421	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
370	AV *av = newAV ();	422	AV *av = newAV ();
371		423
372	av_extend (av, req->result - 1);	424	av_extend (av, req->result - 1);
373		425
374	for (i = 0; i < req->result; ++i)	426	for (i = 0; i < req->result; ++i)
375	{	427	{
376	SV *sv = newSVpv (buf, 0);	428	if (req->int1 & EIO_READDIR_DENTS)
		429	{
		430	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
377		431
		432	if (req->int1 & EIO_READDIR_CUSTOM2)
		433	{
		434	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		435	AV *avent = newAV ();
		436
		437	av_extend (avent, 2);
		438
		439	if (!sv_type [ent->type])
		440	{
		441	sv_type [ent->type] = newSViv (ent->type);
		442	SvREADONLY_on (sv_type [ent->type]);
		443	}
		444
		445	av_store (avent, 0, namesv);
		446	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		447	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		448
		449	av_store (av, i, newRV_noinc ((SV *)avent));
		450	}
		451	else
378	av_store (av, i, sv);	452	av_store (av, i, namesv);
		453
		454	++ent;
		455	}
		456	else
		457	{
		458	SV *name = newSVpv (names, 0);
		459	av_store (av, i, name);
379	buf += SvCUR (sv) + 1;	460	names += SvCUR (name) + 1;
		461	}
380	}	462	}
381		463
382	rv = sv_2mortal (newRV_noinc ((SV *)av));	464	rv = sv_2mortal (newRV_noinc ((SV *)av));
383	}	465	}
384		466
385	PUSHs (rv);	467	PUSHs (rv);
		468
		469	if (req->int1 & EIO_READDIR_CUSTOM1)
		470	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
386	}	471	}
387	break;	472	break;
388		473
389	case REQ_OPEN:	474	case EIO_OPEN:
390	{	475	{
391	/* convert fd to fh */	476	/* convert fd to fh */
392	SV *fh;	477	SV *fh = &PL_sv_undef;
393		478
394	PUSHs (sv_2mortal (newSViv (req->result)));	479	if (req->result >= 0)
395	PUTBACK;	480	{
396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	481	GV *gv = (GV *)sv_newmortal ();
397	SPAGAIN;	482	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		483	char sym [64];
		484	int symlen;
		485
		486	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		487	gv_init (gv, aio_stash, sym, symlen, 0);
398		488
399	fh = SvREFCNT_inc (POPs);	489	symlen = snprintf (
		490	sym,
		491	sizeof (sym),
		492	"%s&=%d",
		493	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		494	(int)req->result
		495	);
400		496
		497	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		498	fh = (SV *)gv;
		499	}
		500
401	PUSHMARK (SP);	501	PUSHs (fh);
402	XPUSHs (sv_2mortal (fh));
403	}	502	}
404	break;	503	break;
405		504
		505	case EIO_STATVFS:
		506	case EIO_FSTATVFS:
		507	{
		508	SV *rv = &PL_sv_undef;
		509
		510	#ifndef _WIN32
		511	if (req->result >= 0)
		512	{
		513	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		514	HV *hv = newHV ();
		515	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		516	* chooses to make it a struct.
		517	*/
		518	unsigned long fsid = 0;
		519	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		520
		521	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		522
		523	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		524	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		525	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		526	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		527	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		528	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		529	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		530	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		531	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		532	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		533	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		534	}
		535	#endif
		536
		537	PUSHs (rv);
		538	}
		539
		540	break;
		541
406	case REQ_GROUP:	542	case EIO_GROUP:
407	req->fd = 2; /* mark group as finished */	543	req->int1 = 2; /* mark group as finished */
408		544
409	if (req->data)	545	if (req->sv1)
410	{	546	{
411	int i;	547	int i;
412	AV *av = (AV *)req->data;	548	AV *av = (AV *)req->sv1;
413		549
414	EXTEND (SP, AvFILL (av) + 1);	550	EXTEND (SP, AvFILL (av) + 1);
415	for (i = 0; i <= AvFILL (av); ++i)	551	for (i = 0; i <= AvFILL (av); ++i)
416	PUSHs (*av_fetch (av, i, 0));	552	PUSHs (*av_fetch (av, i, 0));
417	}	553	}
418	break;	554	break;
419		555
420	case REQ_NOP:	556	case EIO_NOP:
421	case REQ_BUSY:	557	case EIO_BUSY:
422	break;	558	break;
423		559
		560	case EIO_READLINK:
		561	case EIO_REALPATH:
		562	if (req->result > 0)
		563	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		564	break;
		565
		566	case EIO_STAT:
		567	case EIO_LSTAT:
		568	case EIO_FSTAT:
		569	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		570
		571	if (!(PL_laststatval = req->result))
		572	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		573	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		574
		575	PUSHs (sv_result);
		576	break;
		577
		578	case EIO_SEEK:
		579	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		580	break;
		581
		582	case EIO_READ:
		583	{
		584	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		585	*SvEND (req->sv2) = 0;
		586	SvPOK_only (req->sv2);
		587	SvSETMAGIC (req->sv2);
		588	PUSHs (sv_result);
		589	}
		590	break;
		591
		592	case EIO_CUSTOM:
		593	if (req->feed == fiemap)
		594	{
		595	#if HAVE_FIEMAP
		596	if (!req->result)
		597	{
		598	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		599
		600	if (fiemap->fm_extent_count)
		601	{
		602	AV *av = newAV ();
		603	int i;
		604
		605	while (fiemap->fm_mapped_extents)
		606	{
		607	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		608	AV *ext_av = newAV ();
		609
		610	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		611	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		612	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		613	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		614
		615	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		616	}
		617
		618	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		619	}
		620	else
		621	{
		622	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		623	PUSHs (sv_result);
		624	}
		625	}
		626	#endif
		627	}
		628	else
		629	PUSHs (sv_result);
		630	break;
		631
		632	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		633	if (req->result > 0)
		634	SvIV_set (sv_result, 0);
		635	/* FALLTHROUGH */
		636
424	default:	637	default:
425	PUSHs (sv_2mortal (newSViv (req->result)));	638	PUSHs (sv_result);
426	break;	639	break;
427	}	640	}
428		641
		642	errno = req->errorno;
429		643
430	PUTBACK;	644	PUTBACK;
431	call_sv (req->callback, G_VOID | G_EVAL);	645	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
432	SPAGAIN;	646	SPAGAIN;
		647
		648	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		649	SvREFCNT_dec (sv_result);
		650	else
		651	sv_result_cache = sv_result;
433		652
434	FREETMPS;	653	FREETMPS;
435	LEAVE;	654	LEAVE;
		655
		656	PUTBACK;
436	}	657	}
437		658
438	if (req->grp)	659	return !!SvTRUE (ERRSV);
439	{
440	aio_req grp = req->grp;
441
442	/* unlink request */
443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
445
446	if (grp->grp_first == req)
447	grp->grp_first = req->grp_next;
448
449	aio_grp_dec (grp);
450	}
451
452	if (SvTRUE (ERRSV))
453	{
454	req_free (req);
455	croak (0);
456	}
457	}	660	}
458		661
459	static void req_free (aio_req req)	662	static void
		663	req_destroy (aio_req req)
460	{	664	{
461	if (req->self)	665	if (req->self)
462	{	666	{
463	sv_unmagic (req->self, PERL_MAGIC_ext);	667	sv_unmagic (req->self, PERL_MAGIC_ext);
464	SvREFCNT_dec (req->self);	668	SvREFCNT_dec (req->self);
465	}	669	}
466		670
467	SvREFCNT_dec (req->data);
468	SvREFCNT_dec (req->fh);	671	SvREFCNT_dec (req->sv1);
469	SvREFCNT_dec (req->fh2);	672	SvREFCNT_dec (req->sv2);
		673	SvREFCNT_dec (req->sv3);
		674	SvREFCNT_dec (req->sv4);
470	SvREFCNT_dec (req->callback);	675	SvREFCNT_dec (req->callback);
471	Safefree (req->statdata);
472		676
473	if (req->type == REQ_READDIR)
474	free (req->data2ptr);
475
476	Safefree (req);	677	free (req);
477	}	678	}
478		679
		680	static void
479	static void req_cancel_subs (aio_req grp)	681	req_cancel_subs (aio_req grp)
480	{	682	{
481	aio_req sub;
482
483	if (grp->type != REQ_GROUP)	683	if (grp->type != EIO_GROUP)
484	return;	684	return;
485		685
486	SvREFCNT_dec (grp->fh2);	686	SvREFCNT_dec (grp->sv2);
487	grp->fh2 = 0;	687	grp->sv2 = 0;
488		688
489	for (sub = grp->grp_first; sub; sub = sub->grp_next)	689	eio_grp_cancel (grp);
490	req_cancel (sub);
491	}	690	}
492		691
493	static void req_cancel (aio_req req)	692	static void ecb_cold
		693	create_respipe (void)
494	{	694	{
495	req->flags |= FLAG_CANCELLED;	695	if (s_epipe_renew (&respipe))
496		696	croak ("IO::AIO: unable to initialize result pipe");
497	req_cancel_subs (req);
498	}	697	}
499		698
500	static int poll_cb ()	699	static void
		700	poll_wait (void)
501	{	701	{
502	dSP;	702	while (eio_nreqs ())
503	int count = 0;	703	{
504	int do_croak = 0;	704	int size;
505	aio_req req;
506		705
		706	X_LOCK (reslock);
		707	size = res_queue.size;
		708	X_UNLOCK (reslock);
		709
		710	if (size)
		711	return;
		712
		713	etp_maybe_start_thread ();
		714
		715	s_epipe_wait (&respipe);
		716	}
		717	}
		718
		719	static int
		720	poll_cb (void)
		721	{
507	for (;;)	722	for (;;)
508	{	723	{
509	LOCK (reslock);	724	int res = eio_poll ();
510	req = reqq_shift (&res_queue);
511		725
512	if (req)	726	if (res > 0)
		727	croak (0);
		728
		729	if (!max_outstanding || max_outstanding > eio_nreqs ())
		730	return res;
		731
		732	poll_wait ();
		733	}
		734	}
		735
		736	static void ecb_cold
		737	reinit (void)
		738	{
		739	create_respipe ();
		740
		741	if (eio_init (want_poll, done_poll) < 0)
		742	croak ("IO::AIO: unable to initialise eio library");
		743	}
		744
		745	/*****************************************************************************/
		746
		747	#if !_POSIX_MAPPED_FILES
		748	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		749	# define munmap(addr,length) EIO_ENOSYS ()
		750	#endif
		751
		752	#if !_POSIX_MEMORY_PROTECTION
		753	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		754	# define PROT_NONE 0
		755	# define PROT_WRITE 0
		756	# define MAP_PRIVATE 0
		757	# define MAP_SHARED 0
		758	# define MAP_FIXED 0
		759	#endif
		760
		761	#define MMAP_MAGIC PERL_MAGIC_ext
		762
		763	static int ecb_cold
		764	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		765	{
		766	int old_errno = errno;
		767	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		768	errno = old_errno;
		769
		770	mg->mg_obj = 0; /* just in case */
		771
		772	SvREADONLY_off (sv);
		773
		774	if (SvPVX (sv) != mg->mg_ptr)
		775	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		776
		777	SvCUR_set (sv, 0);
		778	SvPVX (sv) = 0;
		779	SvOK_off (sv);
		780
		781	return 0;
		782	}
		783
		784	static MGVTBL mmap_vtbl = {
		785	0, 0, 0, 0, mmap_free
		786	};
		787
		788	/*****************************************************************************/
		789
		790	static SV *
		791	get_cb (SV *cb_sv)
		792	{
		793	SvGETMAGIC (cb_sv);
		794	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		795	}
		796
		797	static aio_req ecb_noinline
		798	dreq (SV *callback)
		799	{
		800	SV *cb_cv;
		801	aio_req req;
		802	int req_pri = next_pri;
		803	next_pri = EIO_PRI_DEFAULT;
		804
		805	cb_cv = get_cb (callback);
		806
		807	req = calloc (sizeof (*req), 1);
		808	if (!req)
		809	croak ("out of memory during eio_req allocation");
		810
		811	req->callback = SvREFCNT_inc (cb_cv);
		812	req->pri = req_pri;
		813
		814	return req;
		815	}
		816
		817	#define dREQ \
		818	aio_req req = dreq (callback); \
		819
		820	#define REQ_SEND \
		821	PUTBACK; \
		822	req_submit (req); \
		823	SPAGAIN; \
		824	\
		825	if (GIMME_V != G_VOID) \
		826	XPUSHs (req_sv (req, aio_req_stash));
		827
		828	ecb_inline void
		829	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		830	{
		831	if (expect_false (SvROK (path)))
		832	{
		833	SV *rv = SvRV (path);
		834	SV *wdob;
		835
		836	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
513	{	837	{
514	if (!res_queue.size)	838	path = AvARRAY (rv)[1];
		839	wdob = AvARRAY (rv)[0];
		840
		841	if (SvOK (wdob))
515	{	842	{
516	/* read any signals sent by the worker threads */	843	*wd = SvAIO_WD (wdob);
517	char buf [32];	844	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
518	while (read (respipe [0], buf, 32) == 32)
519	;
520	}	845	}
		846	else
		847	*wd = EIO_INVALID_WD;
521	}	848	}
522		849	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
523	UNLOCK (reslock);
524
525	if (!req)
526	break;
527
528	--nreqs;
529
530	if (req->type == REQ_QUIT)
531	started--;
532	else if (req->type == REQ_GROUP && req->length)
533	{	850	{
534	req->fd = 1; /* mark request as delayed */	851	*wd = (aio_wd)(long)SvIVX (rv);
535	continue;	852	*wdsv = SvREFCNT_inc_NN (rv);
		853	*ptr = ".";
		854	return; /* path set to "." */
536	}	855	}
537	else	856	else
538	{	857	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
539	if (req->type == REQ_READ)
540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
541
542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
543	SvREADONLY_off (req->data);
544
545	if (req->statdata)
546	{
547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
548	PL_laststatval = req->result;
549	PL_statcache = *(req->statdata);
550	}
551
552	req_invoke (req);
553
554	count++;
555	}
556
557	req_free (req);
558	}	858	}
559		859
560	return count;	860	*pathsv = newSVsv (path);
		861	*ptr = SvPVbyte_nolen (*pathsv);
561	}	862	}
562		863
563	static void *aio_proc(void *arg);	864	static void ecb_noinline
564		865	req_set_path1 (aio_req req, SV *path)
565	static void start_thread (void)
566	{	866	{
567	sigset_t fullsigset, oldsigset;	867	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
568	pthread_attr_t attr;	868	}
569		869
570	worker *wrk = calloc (1, sizeof (worker));	870	static void ecb_noinline
		871	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		872	{
		873	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
571		874
572	if (!wrk)	875	switch (SvTYPE (rv))
573	croak ("unable to allocate worker thread data");
574
575	pthread_attr_init (&attr);
576	pthread_attr_setstacksize (&attr, STACKSIZE);
577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
578
579	sigfillset (&fullsigset);
580
581	LOCK (wrklock);
582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
583
584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
585	{	876	{
586	wrk->prev = &wrk_first;	877	case SVt_PVIO:
587	wrk->next = wrk_first.next;	878	case SVt_PVLV:
588	wrk_first.next->prev = wrk;	879	case SVt_PVGV:
589	wrk_first.next = wrk;	880	req->type = type_fh;
590	started++;	881	req->sv1 = newSVsv (fh_or_path);
		882	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		883	break;
		884
		885	default:
		886	req->type = type_path;
		887	req_set_path1 (req, fh_or_path);
		888	break;
591	}	889	}
592	else
593	free (wrk);
594
595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
596	UNLOCK (wrklock);
597	}	890	}
598		891
599	static void req_send (aio_req req)	892	XS(boot_IO__AIO) ecb_cold;
600	{
601	while (started < wanted && nreqs >= started)
602	start_thread ();
603		893
604	++nreqs;	894	MODULE = IO::AIO PACKAGE = IO::AIO
605		895
606	LOCK (reqlock);	896	PROTOTYPES: ENABLE
607	reqq_push (&req_queue, req);
608	pthread_cond_signal (&reqwait);
609	UNLOCK (reqlock);
610	}
611		897
612	static void end_thread (void)	898	BOOT:
613	{	899	{
614	aio_req req;	900	static const struct {
		901	const char *name;
		902	IV iv;
		903	} *civ, const_iv[] = {
		904	# define const_niv(name, value) { # name, (IV) value },
		905	# define const_iv(name) { # name, (IV) name },
		906	# define const_eio(name) { # name, (IV) EIO_ ## name },
615		907
616	Newz (0, req, 1, aio_cb);	908	/* you have to re-run ./gendef0 after adding/Removing any constants here */
617		909
618	req->type = REQ_QUIT;	910	const_iv (ENOSYS)
619	req->pri = PRI_MAX + PRI_BIAS;	911	const_iv (EXDEV)
		912	const_iv (EBADR)
620		913
621	req_send (req);	914	const_iv (O_RDONLY)
622	}	915	const_iv (O_WRONLY)
		916	const_iv (O_RDWR)
		917	const_iv (O_CREAT)
		918	const_iv (O_TRUNC)
		919	const_iv (O_EXCL)
		920	const_iv (O_APPEND)
623		921
624	static void min_parallel (int nthreads)	922	const_iv (O_ASYNC)
625	{	923	const_iv (O_DIRECT)
626	if (wanted < nthreads)	924	const_iv (O_NOATIME)
627	wanted = nthreads;
628	}
629		925
630	static void max_parallel (int nthreads)	926	const_iv (O_CLOEXEC)
631	{	927	const_iv (O_NOCTTY)
632	int cur = started;	928	const_iv (O_NOFOLLOW)
		929	const_iv (O_NONBLOCK)
		930	const_iv (O_EXEC)
		931	const_iv (O_SEARCH)
		932	const_iv (O_DIRECTORY)
		933	const_iv (O_DSYNC)
		934	const_iv (O_RSYNC)
		935	const_iv (O_SYNC)
		936	const_iv (O_TTY_INIT)
633		937
634	if (wanted > nthreads)	938	const_iv (S_IFIFO)
635	wanted = nthreads;	939	const_iv (S_IFCHR)
		940	const_iv (S_IFBLK)
		941	const_iv (S_IFLNK)
		942	const_iv (S_IFREG)
		943	const_iv (S_IFDIR)
		944	const_iv (S_IFWHT)
		945	const_iv (S_IFSOCK)
		946	const_iv (S_IFMT)
636		947
637	while (cur > wanted)	948	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
638	{	949	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
639	end_thread ();	950	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
640	cur--;	951	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
641	}	952	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		953	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
642		954
643	while (started > wanted)	955	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
644	{	956	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
645	poll_wait ();	957	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
646	poll_cb ();	958	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
647	}	959	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
648	}
649		960
650	static void create_pipe ()	961	const_iv (ST_RDONLY)
651	{	962	const_iv (ST_NOSUID)
652	if (pipe (respipe))	963	const_iv (ST_NODEV)
653	croak ("unable to initialize result pipe");	964	const_iv (ST_NOEXEC)
		965	const_iv (ST_SYNCHRONOUS)
		966	const_iv (ST_MANDLOCK)
		967	const_iv (ST_WRITE)
		968	const_iv (ST_APPEND)
		969	const_iv (ST_IMMUTABLE)
		970	const_iv (ST_NOATIME)
		971	const_iv (ST_NODIRATIME)
		972	const_iv (ST_RELATIME)
654		973
655	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	974	const_iv (PROT_NONE)
656	croak ("cannot set result pipe to nonblocking mode");	975	const_iv (PROT_EXEC)
		976	const_iv (PROT_READ)
		977	const_iv (PROT_WRITE)
657		978
658	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	979	/*const_iv (MAP_FIXED)*/
659	croak ("cannot set result pipe to nonblocking mode");	980	const_iv (MAP_PRIVATE)
660	}	981	const_iv (MAP_SHARED)
		982	const_iv (MAP_ANONYMOUS)
661		983
662	/*****************************************************************************/	984	/* linuxish */
663	/* work around various missing functions */	985	const_iv (MAP_HUGETLB)
		986	const_iv (MAP_LOCKED)
		987	const_iv (MAP_NORESERVE)
		988	const_iv (MAP_POPULATE)
		989	const_iv (MAP_NONBLOCK)
664		990
665	#if !HAVE_PREADWRITE	991	const_iv (FIEMAP_FLAG_SYNC)
666	# define pread aio_pread	992	const_iv (FIEMAP_FLAG_XATTR)
667	# define pwrite aio_pwrite	993	const_iv (FIEMAP_FLAGS_COMPAT)
		994	const_iv (FIEMAP_EXTENT_LAST)
		995	const_iv (FIEMAP_EXTENT_UNKNOWN)
		996	const_iv (FIEMAP_EXTENT_DELALLOC)
		997	const_iv (FIEMAP_EXTENT_ENCODED)
		998	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		999	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1000	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1001	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1002	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1003	const_iv (FIEMAP_EXTENT_MERGED)
		1004	const_iv (FIEMAP_EXTENT_SHARED)
668		1005
669	/*	1006	const_iv (SPLICE_F_MOVE)
670	* make our pread/pwrite safe against themselves, but not against	1007	const_iv (SPLICE_F_NONBLOCK)
671	* normal read/write by using a mutex. slows down execution a lot,	1008	const_iv (SPLICE_F_MORE)
672	* but that's your problem, not mine.	1009	const_iv (SPLICE_F_GIFT)
673	*/
674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
675		1010
676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1011	const_iv (SEEK_DATA)
677	{	1012	const_iv (SEEK_HOLE)
678	ssize_t res;
679	off_t ooffset;
680		1013
681	LOCK (preadwritelock);	1014	/* libeio constants */
682	ooffset = lseek (fd, 0, SEEK_CUR);	1015	const_eio (SEEK_SET)
683	lseek (fd, offset, SEEK_SET);	1016	const_eio (SEEK_CUR)
684	res = read (fd, buf, count);	1017	const_eio (SEEK_END)
685	lseek (fd, ooffset, SEEK_SET);
686	UNLOCK (preadwritelock);
687		1018
688	return res;	1019	const_eio (MCL_FUTURE)
689	}	1020	const_eio (MCL_CURRENT)
690		1021
691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1022	const_eio (MS_ASYNC)
692	{	1023	const_eio (MS_INVALIDATE)
693	ssize_t res;	1024	const_eio (MS_SYNC)
694	off_t ooffset;
695		1025
696	LOCK (preadwritelock);	1026	const_eio (MT_MODIFY)
697	ooffset = lseek (fd, 0, SEEK_CUR);
698	lseek (fd, offset, SEEK_SET);
699	res = write (fd, buf, count);
700	lseek (fd, offset, SEEK_SET);
701	UNLOCK (preadwritelock);
702		1027
703	return res;	1028	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
704	}	1029	const_eio (SYNC_FILE_RANGE_WRITE)
705	#endif	1030	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
706		1031
707	#if !HAVE_FDATASYNC	1032	const_eio (FALLOC_FL_KEEP_SIZE)
708	# define fdatasync fsync	1033	const_eio (FALLOC_FL_PUNCH_HOLE)
709	#endif
710		1034
711	#if !HAVE_READAHEAD	1035	const_eio (READDIR_DENTS)
712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	1036	const_eio (READDIR_DIRS_FIRST)
		1037	const_eio (READDIR_STAT_ORDER)
		1038	const_eio (READDIR_FOUND_UNKNOWN)
713		1039
714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1040	const_eio (DT_UNKNOWN)
715	{	1041	const_eio (DT_FIFO)
716	dBUF;	1042	const_eio (DT_CHR)
717		1043	const_eio (DT_DIR)
718	while (count > 0)	1044	const_eio (DT_BLK)
719	{	1045	const_eio (DT_REG)
720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	1046	const_eio (DT_LNK)
721		1047	const_eio (DT_SOCK)
722	pread (fd, aio_buf, len, offset);	1048	const_eio (DT_WHT)
723	offset += len;
724	count -= len;
725	}
726
727	errno = 0;
728	}
729
730	#endif
731
732	#if !HAVE_READDIR_R
733	# define readdir_r aio_readdir_r
734
735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
736
737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
738	{
739	struct dirent *e;
740	int errorno;
741
742	LOCK (readdirlock);
743
744	e = readdir (dirp);
745	errorno = errno;
746
747	if (e)
748	{
749	*res = ent;
750	strcpy (ent->d_name, e->d_name);
751	}
752	else
753	*res = 0;
754
755	UNLOCK (readdirlock);
756
757	errno = errorno;
758	return e ? 0 : -1;
759	}
760	#endif
761
762	/* sendfile always needs emulation */
763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
764	{
765	ssize_t res;
766
767	if (!count)
768	return 0;
769
770	#if HAVE_SENDFILE
771	# if __linux
772	res = sendfile (ofd, ifd, &offset, count);
773
774	# elif __freebsd
775	/*
776	* Of course, the freebsd sendfile is a dire hack with no thoughts
777	* wasted on making it similar to other I/O functions.
778	*/
779	{
780	off_t sbytes;
781	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
782
783	if (res < 0 && sbytes)
784	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
785	res = sbytes;
786	}	1049	};
787		1050
788	# elif __hpux	1051	aio_stash = gv_stashpv ("IO::AIO" , 1);
789	res = sendfile (ofd, ifd, offset, count, 0, 0);	1052	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1053	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1054	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
790		1055
791	# elif __solaris	1056	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
792	{	1057	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
793	struct sendfilevec vec;
794	size_t sbytes;
795		1058
796	vec.sfv_fd = ifd;	1059	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
797	vec.sfv_flag = 0;
798	vec.sfv_off = offset;
799	vec.sfv_len = count;
800		1060
801	res = sendfilev (ofd, &vec, 1, &sbytes);	1061	reinit ();
		1062	}
802		1063
803	if (res < 0 && sbytes)	1064	void
		1065	reinit ()
		1066	PROTOTYPE:
		1067
		1068	void
		1069	max_poll_reqs (unsigned int nreqs)
		1070	PROTOTYPE: $
		1071	CODE:
		1072	eio_set_max_poll_reqs (nreqs);
		1073
		1074	void
		1075	max_poll_time (double nseconds)
		1076	PROTOTYPE: $
		1077	CODE:
		1078	eio_set_max_poll_time (nseconds);
		1079
		1080	void
		1081	min_parallel (unsigned int nthreads)
		1082	PROTOTYPE: $
		1083	CODE:
		1084	eio_set_min_parallel (nthreads);
		1085
		1086	void
		1087	max_parallel (unsigned int nthreads)
		1088	PROTOTYPE: $
		1089	CODE:
		1090	eio_set_max_parallel (nthreads);
		1091
		1092	void
		1093	max_idle (unsigned int nthreads)
		1094	PROTOTYPE: $
		1095	CODE:
		1096	eio_set_max_idle (nthreads);
		1097
		1098	void
		1099	idle_timeout (unsigned int seconds)
		1100	PROTOTYPE: $
		1101	CODE:
		1102	eio_set_idle_timeout (seconds);
		1103
		1104	void
		1105	max_outstanding (unsigned int maxreqs)
		1106	PROTOTYPE: $
		1107	CODE:
		1108	max_outstanding = maxreqs;
		1109
		1110	void
		1111	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1112	PPCODE:
		1113	{
		1114	dREQ;
		1115
		1116	req->type = EIO_WD_OPEN;
		1117	req_set_path1 (req, pathname);
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1124	PPCODE:
		1125	{
		1126	dREQ;
		1127
		1128	req->type = EIO_OPEN;
		1129	req_set_path1 (req, pathname);
		1130	req->int1 = flags;
		1131	req->int2 = mode;
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
		1137	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1138	ALIAS:
		1139	aio_fsync = EIO_FSYNC
		1140	aio_fdatasync = EIO_FDATASYNC
		1141	aio_syncfs = EIO_SYNCFS
		1142	PPCODE:
		1143	{
		1144	int fd = s_fileno_croak (fh, 0);
		1145	dREQ;
		1146
		1147	req->type = ix;
		1148	req->sv1 = newSVsv (fh);
		1149	req->int1 = fd;
		1150
		1151	REQ_SEND;
		1152	}
		1153
		1154	void
		1155	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1156	PPCODE:
		1157	{
		1158	int fd = s_fileno_croak (fh, 0);
		1159	dREQ;
		1160
		1161	req->type = EIO_SYNC_FILE_RANGE;
		1162	req->sv1 = newSVsv (fh);
		1163	req->int1 = fd;
		1164	req->offs = offset;
804	res = sbytes;	1165	req->size = nbytes;
805	}	1166	req->int2 = flags;
806		1167
807	# endif	1168	REQ_SEND;
		1169	}
		1170
		1171	void
		1172	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1173	PPCODE:
		1174	{
		1175	int fd = s_fileno_croak (fh, 0);
		1176	dREQ;
		1177
		1178	req->type = EIO_FALLOCATE;
		1179	req->sv1 = newSVsv (fh);
		1180	req->int1 = fd;
		1181	req->int2 = mode;
		1182	req->offs = offset;
		1183	req->size = len;
		1184
		1185	REQ_SEND;
		1186	}
		1187
		1188	void
		1189	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1190	PPCODE:
		1191	{
		1192	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1193	int fd = s_fileno_croak (fh, 0);
		1194	dREQ;
		1195
		1196	if (expect_false (close_fd < 0))
		1197	{
		1198	int pipefd [2];
		1199
		1200	if (
		1201	#ifdef _WIN32
		1202	_pipe (pipefd, 1, _O_BINARY) < 0
808	#else	1203	#else
809	res = -1;	1204	pipe (pipefd) < 0
810	errno = ENOSYS;	1205	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
811	#endif	1206	#endif
812		1207	|| close (pipefd [1]) < 0
813	if (res < 0
814	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
815	#if __solaris
816	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
817	#endif
818	)
819	)
820	{
821	/* emulate sendfile. this is a major pain in the ass */
822	dBUF;
823
824	res = 0;
825
826	while (count)
827	{
828	ssize_t cnt;
829
830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
831
832	if (cnt <= 0)
833	{	1208	)
834	if (cnt && !res) res = -1;	1209	abort (); /*D*/
835	break;
836	}
837		1210
838	cnt = write (ofd, aio_buf, cnt);	1211	close_fd = pipefd [0];
839
840	if (cnt <= 0)
841	{
842	if (cnt && !res) res = -1;
843	break;
844	}
845
846	offset += cnt;
847	res += cnt;
848	count -= cnt;
849	}
850	}
851
852	return res;
853	}
854
855	/* read a full directory */
856	static void scandir_ (aio_req req, worker *self)
857	{
858	DIR *dirp;
859	union
860	{
861	struct dirent d;
862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
863	} *u;
864	struct dirent *entp;
865	char *name, *names;
866	int memlen = 4096;
867	int memofs = 0;
868	int res = 0;
869	int errorno;
870
871	LOCK (wrklock);
872	self->dirp = dirp = opendir (req->dataptr);
873	self->dbuf = u = malloc (sizeof (*u));
874	UNLOCK (wrklock);
875
876	req->data2ptr = names = malloc (memlen);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}	1212	}
909	}
910		1213
911	if (errno)	1214	req->type = EIO_DUP2;
912	res = -1;	1215	req->int1 = close_fd;
913		1216	req->sv2 = newSVsv (fh);
914	req->result = res;	1217	req->int2 = fd;
915	}
916		1218
917	/*****************************************************************************/	1219	REQ_SEND;
918
919	static void *aio_proc (void *thr_arg)
920	{
921	aio_req req;
922	int type;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}	1220	}
1010		1221
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}
1038
1039	static void atfork_child (void)
1040	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();
1066
1067	atfork_parent ();
1068	}
1069
1070	#define dREQ \
1071	aio_req req; \
1072	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
1074	\
1075	if (SvOK (callback) && !SvROK (callback)) \
1076	croak ("callback must be undef or of reference type"); \
1077	\
1078	Newz (0, req, 1, aio_cb); \
1079	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \
1081	\
1082	req->callback = newSVsv (callback); \
1083	req->pri = req_pri
1084
1085	#define REQ_SEND \
1086	req_send (req); \
1087	\
1088	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090
1091	MODULE = IO::AIO PACKAGE = IO::AIO
1092
1093	PROTOTYPES: ENABLE
1094
1095	BOOT:
1096	{
1097	HV *stash = gv_stashpv ("IO::AIO", 1);
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1101
1102	create_pipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1104	}
1105
1106	void	1222	void
1107	min_parallel (nthreads)	1223	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1108	int nthreads	1224	PPCODE:
1109	PROTOTYPE: $
1110
1111	void
1112	max_parallel (nthreads)
1113	int nthreads
1114	PROTOTYPE: $
1115
1116	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$
1123	PPCODE:
1124	{	1225	{
		1226	int fd = s_fileno_croak (fh, 0);
1125	dREQ;	1227	dREQ;
1126		1228
1127	req->type = REQ_OPEN;	1229	req->type = EIO_SEEK;
1128	req->data = newSVsv (pathname);	1230	req->sv1 = newSVsv (fh);
1129	req->dataptr = SvPVbyte_nolen (req->data);	1231	req->int1 = fd;
1130	req->fd = flags;	1232	req->offs = SvVAL64 (offset);
1131	req->mode = mode;	1233	req->int2 = whence;
1132		1234
1133	REQ_SEND;	1235	REQ_SEND;
1134	}	1236	}
1135		1237
1136	void	1238	void
1137	aio_close (fh,callback=&PL_sv_undef)	1239	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$
1141	ALIAS:	1240	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC
1145	PPCODE:
1146	{
1147	dREQ;
1148
1149	req->type = ix;
1150	req->fh = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152
1153	REQ_SEND (req);
1154	}
1155
1156	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:
1165	aio_read = REQ_READ	1241	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	1242	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$
1168	PPCODE:	1243	PPCODE:
1169	{	1244	{
1170	aio_req req;
1171	STRLEN svlen;	1245	STRLEN svlen;
		1246	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1172	char *svptr = SvPVbyte (data, svlen);	1247	char *svptr = SvPVbyte (data, svlen);
1173		1248	UV len = SvUV (length);
1174	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);
1176		1249
1177	if (dataoffset < 0)	1250	if (dataoffset < 0)
1178	dataoffset += svlen;	1251	dataoffset += svlen;
1179		1252
1180	if (dataoffset < 0 || dataoffset > svlen)	1253	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	1254	croak ("dataoffset outside of data scalar");
1182		1255
1183	if (ix == REQ_WRITE)	1256	if (ix == EIO_WRITE)
1184	{	1257	{
1185	/* write: check length and adjust. */	1258	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	1259	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	1260	len = svlen - dataoffset;
1188	}	1261	}
1189	else	1262	else
1190	{	1263	{
1191	/* read: grow scalar as necessary */	1264	/* read: check type and grow scalar as necessary */
		1265	SvUPGRADE (data, SVt_PV);
		1266	if (SvLEN (data) >= SvCUR (data))
1192	svptr = SvGROW (data, length + dataoffset);	1267	svptr = SvGROW (data, len + dataoffset + 1);
		1268	else if (SvCUR (data) < len + dataoffset)
		1269	croak ("length + dataoffset outside of scalar, and cannot grow");
1193	}	1270	}
1194
1195	if (length < 0)
1196	croak ("length must not be negative");
1197		1271
1198	{	1272	{
1199	dREQ;	1273	dREQ;
1200		1274
1201	req->type = ix;	1275	req->type = ix;
1202	req->fh = newSVsv (fh);	1276	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1277	req->int1 = fd;
1204	: IoOFP (sv_2io (fh)));	1278	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	1279	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	1280	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	1281	req->ptr2 = (char *)svptr + dataoffset;
		1282	req->stroffset = dataoffset;
1209		1283
1210	if (!SvREADONLY (data))	1284	if (!SvREADONLY (data))
1211	{	1285	{
1212	SvREADONLY_on (data);	1286	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	1287	req->flags |= FLAG_SV2_RO_OFF;
1214	}	1288	}
1215		1289
1216	REQ_SEND;	1290	REQ_SEND;
1217	}	1291	}
1218	}	1292	}
1219		1293
1220	void	1294	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1295	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1222	SV * out_fh	1296	ALIAS:
1223	SV * in_fh	1297	aio_readlink = EIO_READLINK
1224	UV in_offset	1298	aio_realpath = EIO_REALPATH
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$
1228	PPCODE:	1299	PPCODE:
1229	{	1300	{
		1301	dREQ;
		1302
		1303	req->type = ix;
		1304	req_set_path1 (req, pathname);
		1305
		1306	REQ_SEND;
		1307	}
		1308
		1309	void
		1310	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1311	PPCODE:
		1312	{
		1313	int ifd = s_fileno_croak (in_fh , 0);
		1314	int ofd = s_fileno_croak (out_fh, 1);
1230	dREQ;	1315	dREQ;
1231		1316
1232	req->type = REQ_SENDFILE;	1317	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	1318	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1319	req->int1 = ofd;
1235	req->fh2 = newSVsv (in_fh);	1320	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1321	req->int2 = ifd;
1237	req->offset = in_offset;	1322	req->offs = in_offset;
1238	req->length = length;	1323	req->size = length;
1239		1324
1240	REQ_SEND;	1325	REQ_SEND;
1241	}	1326	}
1242		1327
1243	void	1328	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1329	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$
1250	PPCODE:	1330	PPCODE:
1251	{	1331	{
		1332	int fd = s_fileno_croak (fh, 0);
1252	dREQ;	1333	dREQ;
1253		1334
1254	req->type = REQ_READAHEAD;	1335	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	1336	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1337	req->int1 = fd;
1257	req->offset = offset;	1338	req->offs = offset;
1258	req->length = length;	1339	req->size = length;
1259		1340
1260	REQ_SEND;	1341	REQ_SEND;
1261	}	1342	}
1262		1343
1263	void	1344	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	1345	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	1346	ALIAS:
1268	aio_stat = REQ_STAT	1347	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	1348	aio_lstat = EIO_LSTAT
		1349	aio_statvfs = EIO_STATVFS
1270	PPCODE:	1350	PPCODE:
1271	{	1351	{
1272	dREQ;	1352	dREQ;
1273		1353
1274	New (0, req->statdata, 1, Stat_t);	1354	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1275	if (!req->statdata)
1276	{
1277	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");
1279	}
1280
1281	if (SvPOK (fh_or_path))
1282	{
1283	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);
1286	}
1287	else
1288	{
1289	req->type = REQ_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}
1293		1355
1294	REQ_SEND;	1356	REQ_SEND;
1295	}	1357	}
1296		1358
		1359	UV
		1360	major (UV dev)
		1361	ALIAS:
		1362	minor = 1
		1363	CODE:
		1364	RETVAL = ix ? major (dev) : minor (dev);
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	UV
		1369	makedev (UV maj, UV min)
		1370	CODE:
		1371	RETVAL = makedev (maj, min);
		1372	OUTPUT:
		1373	RETVAL
		1374
1297	void	1375	void
		1376	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1377	PPCODE:
		1378	{
		1379	dREQ;
		1380
		1381	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1382	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1383	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1384
		1385	REQ_SEND;
		1386	}
		1387
		1388	void
		1389	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1390	PPCODE:
		1391	{
		1392	dREQ;
		1393
		1394	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1395	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1396
		1397	REQ_SEND;
		1398	}
		1399
		1400	void
		1401	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1402	PPCODE:
		1403	{
		1404	dREQ;
		1405
		1406	req->int2 = mode;
		1407	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1408
		1409	REQ_SEND;
		1410	}
		1411
		1412	void
		1413	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1414	PPCODE:
		1415	{
		1416	dREQ;
		1417
		1418	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1419	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1420	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1421
		1422	REQ_SEND;
		1423	}
		1424
		1425	void
		1426	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1427	PPCODE:
		1428	{
		1429	dREQ;
		1430
		1431	req->type = EIO_READDIR;
		1432	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1433
		1434	if (flags & EIO_READDIR_DENTS)
		1435	req->int1 |= EIO_READDIR_CUSTOM2;
		1436
		1437	req_set_path1 (req, pathname);
		1438
		1439	REQ_SEND;
		1440	}
		1441
		1442	void
		1443	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1444	PPCODE:
		1445	{
		1446	dREQ;
		1447
		1448	req->type = EIO_MKDIR;
		1449	req->int2 = mode;
		1450	req_set_path1 (req, pathname);
		1451
		1452	REQ_SEND;
		1453	}
		1454
		1455	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	1456	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	1457	ALIAS:
1302	aio_unlink = REQ_UNLINK	1458	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	1459	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	1460	aio_readdir = EIO_READDIR
1305	PPCODE:	1461	PPCODE:
1306	{	1462	{
1307	dREQ;	1463	dREQ;
1308		1464
1309	req->type = ix;	1465	req->type = ix;
1310	req->data = newSVsv (pathname);	1466	req_set_path1 (req, pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	1467
1312
1313	REQ_SEND;	1468	REQ_SEND;
1314	}	1469	}
1315		1470
1316	void	1471	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1472	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:	1473	ALIAS:
1322	aio_link = REQ_LINK	1474	aio_link = EIO_LINK
1323	aio_symlink = REQ_SYMLINK	1475	aio_symlink = EIO_SYMLINK
1324	aio_rename = REQ_RENAME	1476	aio_rename = EIO_RENAME
1325	PPCODE:	1477	PPCODE:
1326	{	1478	{
		1479	eio_wd wd2 = 0;
1327	dREQ;	1480	dREQ;
1328		1481
1329	req->type = ix;	1482	req->type = ix;
1330	req->fh = newSVsv (oldpath);	1483	req_set_path1 (req, oldpath);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	1484	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1332	req->data = newSVsv (newpath);	1485	req->int3 = (long)wd2;
1333	req->dataptr = SvPVbyte_nolen (req->data);
1334		1486
1335	REQ_SEND;	1487	REQ_SEND;
1336	}	1488	}
1337		1489
1338	void	1490	void
1339	aio_busy (delay,callback=&PL_sv_undef)	1491	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	1492	PPCODE:
1343	{	1493	{
1344	dREQ;	1494	dREQ;
1345		1495
1346	req->type = REQ_BUSY;	1496	req->type = EIO_MKNOD;
1347	req->fd = delay < 0. ? 0 : delay;	1497	req->int2 = (mode_t)mode;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1498	req->offs = dev;
1349		1499	req_set_path1 (req, pathname);
		1500
1350	REQ_SEND;	1501	REQ_SEND;
1351	}	1502	}
1352		1503
1353	void	1504	void
1354	aio_group (callback=&PL_sv_undef)	1505	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1355	SV * callback	1506	ALIAS:
1356	PROTOTYPE: ;$	1507	aio_mtouch = EIO_MTOUCH
		1508	aio_msync = EIO_MSYNC
1357	PPCODE:	1509	PPCODE:
1358	{	1510	{
		1511	STRLEN svlen;
		1512	char *svptr = SvPVbyte (data, svlen);
		1513	UV len = SvUV (length);
		1514
		1515	if (offset < 0)
		1516	offset += svlen;
		1517
		1518	if (offset < 0 || offset > svlen)
		1519	croak ("offset outside of scalar");
		1520
		1521	if (!SvOK (length) || len + offset > svlen)
		1522	len = svlen - offset;
		1523
		1524	{
		1525	dREQ;
		1526
		1527	req->type = ix;
		1528	req->sv2 = SvREFCNT_inc (data);
		1529	req->ptr2 = (char *)svptr + offset;
		1530	req->size = len;
		1531	req->int1 = flags;
		1532
		1533	REQ_SEND;
		1534	}
		1535	}
		1536
		1537	void
		1538	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1539	PPCODE:
		1540	{
		1541	STRLEN svlen;
		1542	char *svptr = SvPVbyte (data, svlen);
		1543	UV len = SvUV (length);
		1544
		1545	if (offset < 0)
		1546	offset += svlen;
		1547
		1548	if (offset < 0 || offset > svlen)
		1549	croak ("offset outside of scalar");
		1550
		1551	if (!SvOK (length) || len + offset > svlen)
		1552	len = svlen - offset;
		1553
		1554	{
		1555	dREQ;
		1556
		1557	req->type = EIO_MLOCK;
		1558	req->sv2 = SvREFCNT_inc (data);
		1559	req->ptr2 = (char *)svptr + offset;
		1560	req->size = len;
		1561
		1562	REQ_SEND;
		1563	}
		1564	}
		1565
		1566	void
		1567	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1568	PPCODE:
		1569	{
		1570	dREQ;
		1571
		1572	req->type = EIO_MLOCKALL;
		1573	req->int1 = flags;
		1574
		1575	REQ_SEND;
		1576	}
		1577
		1578	void
		1579	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1580	PPCODE:
		1581	{
		1582	int fd = s_fileno_croak (fh, 0);
1359	dREQ;	1583	dREQ;
1360		1584
1361	req->type = REQ_GROUP;	1585	req->type = EIO_CUSTOM;
1362	req_send (req);	1586	req->sv1 = newSVsv (fh);
		1587	req->int1 = fd;
1363		1588
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1589	req->feed = fiemap;
1365	}	1590	#if HAVE_FIEMAP
		1591	/* keep our fingers crossed that the next two types are 64 bit */
		1592	req->offs = start;
		1593	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1594	req->int2 = flags;
		1595	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1596	#endif
1366		1597
		1598	REQ_SEND;
		1599	}
		1600
1367	void	1601	void
1368	aio_nop (callback=&PL_sv_undef)	1602	aio_busy (double delay, SV *callback=&PL_sv_undef)
1369	SV * callback
1370	PPCODE:	1603	PPCODE:
1371	{	1604	{
1372	dREQ;	1605	dREQ;
1373		1606
1374	req->type = REQ_NOP;	1607	req->type = EIO_BUSY;
		1608	req->nv1 = delay < 0. ? 0. : delay;
1375		1609
1376	REQ_SEND;	1610	REQ_SEND;
1377	}	1611	}
1378		1612
1379	void	1613	void
1380	aioreq_pri (int pri = DEFAULT_PRI)	1614	aio_group (SV *callback=&PL_sv_undef)
1381	CODE:	1615	PPCODE:
		1616	{
		1617	dREQ;
		1618
		1619	req->type = EIO_GROUP;
		1620
		1621	PUTBACK;
		1622	req_submit (req);
		1623	SPAGAIN;
		1624
		1625	XPUSHs (req_sv (req, aio_grp_stash));
		1626	}
		1627
		1628	void
		1629	aio_nop (SV *callback=&PL_sv_undef)
		1630	ALIAS:
		1631	aio_nop = EIO_NOP
		1632	aio_sync = EIO_SYNC
		1633	PPCODE:
		1634	{
		1635	dREQ;
		1636
		1637	req->type = ix;
		1638
		1639	REQ_SEND;
		1640	}
		1641
		1642	int
		1643	aioreq_pri (int pri = 0)
		1644	CODE:
		1645	RETVAL = next_pri;
		1646	if (items > 0)
		1647	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	1648	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	1649	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	1650	next_pri = pri;
		1651	}
		1652	OUTPUT:
		1653	RETVAL
1385		1654
1386	void	1655	void
1387	aioreq_nice (int nice = 0)	1656	aioreq_nice (int nice = 0)
1388	CODE:	1657	CODE:
1389	nice = next_pri - nice;	1658	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	1659	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	1660	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	1661	next_pri = nice;
1393		1662
1394	void	1663	void
1395	flush ()	1664	flush ()
1396	PROTOTYPE:
1397	CODE:	1665	CODE:
1398	while (nreqs)	1666	while (eio_nreqs ())
1399	{	1667	{
1400	poll_wait ();	1668	poll_wait ();
1401	poll_cb ();	1669	poll_cb ();
1402	}	1670	}
1403		1671
1404	void	1672	int
1405	poll()	1673	poll ()
1406	PROTOTYPE:
1407	CODE:	1674	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	1675	poll_wait ();
1411	poll_cb ();	1676	RETVAL = poll_cb ();
1412	}
1413
1414	int
1415	poll_fileno()
1416	PROTOTYPE:
1417	CODE:
1418	RETVAL = respipe [0];
1419	OUTPUT:	1677	OUTPUT:
1420	RETVAL	1678	RETVAL
1421		1679
1422	int	1680	int
		1681	poll_fileno ()
		1682	CODE:
		1683	RETVAL = s_epipe_fd (&respipe);
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	int
1423	poll_cb(...)	1688	poll_cb (...)
1424	PROTOTYPE:	1689	PROTOTYPE:
1425	CODE:	1690	CODE:
1426	RETVAL = poll_cb ();	1691	RETVAL = poll_cb ();
1427	OUTPUT:	1692	OUTPUT:
1428	RETVAL	1693	RETVAL
1429		1694
1430	void	1695	void
1431	poll_wait()	1696	poll_wait ()
1432	PROTOTYPE:
1433	CODE:	1697	CODE:
1434	if (nreqs)
1435	poll_wait ();	1698	poll_wait ();
1436		1699
1437	int	1700	int
1438	nreqs()	1701	nreqs ()
1439	PROTOTYPE:
1440	CODE:	1702	CODE:
1441	RETVAL = nreqs;	1703	RETVAL = eio_nreqs ();
1442	OUTPUT:	1704	OUTPUT:
1443	RETVAL	1705	RETVAL
1444		1706
		1707	int
		1708	nready ()
		1709	CODE:
		1710	RETVAL = eio_nready ();
		1711	OUTPUT:
		1712	RETVAL
		1713
		1714	int
		1715	npending ()
		1716	CODE:
		1717	RETVAL = eio_npending ();
		1718	OUTPUT:
		1719	RETVAL
		1720
		1721	int
		1722	nthreads ()
		1723	CODE:
		1724	RETVAL = eio_nthreads ();
		1725	OUTPUT:
		1726	RETVAL
		1727
		1728	int
		1729	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1730	CODE:
		1731	RETVAL = posix_fadvise (fh, offset, length, advice);
		1732	OUTPUT:
		1733	RETVAL
		1734
		1735	IV
		1736	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1737	CODE:
		1738	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1739	OUTPUT:
		1740	RETVAL
		1741
		1742	void
		1743	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1744	PPCODE:
		1745	sv_unmagic (scalar, MMAP_MAGIC);
		1746	{
		1747	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1748	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1749	if (addr == (void *)-1)
		1750	XSRETURN_NO;
		1751
		1752	sv_force_normal (scalar);
		1753
		1754	/* we store the length in mg_obj, as namlen is I32 :/ */
		1755	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1756	->mg_obj = (SV *)length;
		1757
		1758	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1759
		1760	if (!(prot & PROT_WRITE))
		1761	SvREADONLY_on (scalar);
		1762
		1763	if (SvLEN (scalar))
		1764	Safefree (SvPVX (scalar));
		1765
		1766	SvPVX (scalar) = (char *)addr;
		1767	SvCUR_set (scalar, length);
		1768	SvLEN_set (scalar, 0);
		1769	SvPOK_only (scalar);
		1770
		1771	XSRETURN_YES;
		1772	}
		1773
		1774	void
		1775	munmap (SV *scalar)
		1776	CODE:
		1777	sv_unmagic (scalar, MMAP_MAGIC);
		1778
		1779	int
		1780	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1781	ALIAS:
		1782	mprotect = 1
		1783	CODE:
		1784	{
		1785	STRLEN svlen;
		1786	void *addr = SvPVbyte (scalar, svlen);
		1787	size_t len = SvUV (length);
		1788
		1789	if (offset < 0)
		1790	offset += svlen;
		1791
		1792	if (offset < 0 || offset > svlen)
		1793	croak ("offset outside of scalar");
		1794
		1795	if (!SvOK (length) || len + offset > svlen)
		1796	len = svlen - offset;
		1797
		1798	addr = (void *)(((intptr_t)addr) + offset);
		1799	eio_page_align (&addr, &len);
		1800
		1801	switch (ix)
		1802	{
		1803	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1804	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1805	}
		1806	}
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810	int
		1811	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1812	CODE:
		1813	{
		1814	STRLEN svlen;
		1815	void *addr = SvPVbyte (scalar, svlen);
		1816	size_t len = SvUV (length);
		1817
		1818	if (offset < 0)
		1819	offset += svlen;
		1820
		1821	if (offset < 0 || offset > svlen)
		1822	croak ("offset outside of scalar");
		1823
		1824	if (!SvOK (length) || len + offset > svlen)
		1825	len = svlen - offset;
		1826
		1827	addr = (void *)(((intptr_t)addr) + offset);
		1828	eio_page_align (&addr, &len);
		1829	#if _POSIX_MEMLOCK_RANGE
		1830	RETVAL = munlock (addr, len);
		1831	#else
		1832	RETVAL = EIO_ENOSYS ();
		1833	#endif
		1834	}
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	int
		1839	munlockall ()
		1840	CODE:
		1841	#if _POSIX_MEMLOCK
		1842	munlockall ();
		1843	#else
		1844	RETVAL = EIO_ENOSYS ();
		1845	#endif
		1846	OUTPUT:
		1847	RETVAL
		1848
		1849	int
		1850	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1851	CODE:
		1852	{
		1853	#if HAVE_LINUX_SPLICE
		1854	loff_t off_in_, off_out_;
		1855	RETVAL = splice (
		1856	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1857	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1858	length, flags
		1859	);
		1860	#else
		1861	RETVAL = EIO_ENOSYS ();
		1862	#endif
		1863	}
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	int
		1868	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1869	CODE:
		1870	#if HAVE_LINUX_SPLICE
		1871	RETVAL = tee (rfh, wfh, length, flags);
		1872	#else
		1873	RETVAL = EIO_ENOSYS ();
		1874	#endif
		1875	OUTPUT:
		1876	RETVAL
		1877
		1878	int
		1879	pipesize (aio_rfd rfh, int new_size = -1)
		1880	PROTOTYPE: $;$
		1881	CODE:
		1882	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1883	if (new_size >= 0)
		1884	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1885	else
		1886	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1887	#else
		1888	errno = ENOSYS;
		1889	RETVAL = -1;
		1890	#endif
		1891	OUTPUT:
		1892	RETVAL
		1893
		1894	void _on_next_submit (SV *cb)
		1895	CODE:
		1896	SvREFCNT_dec (on_next_submit);
		1897	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1898
1445	PROTOTYPES: DISABLE	1899	PROTOTYPES: DISABLE
		1900
		1901	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1902
		1903	BOOT:
		1904	{
		1905	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1906	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1907	}
		1908
		1909	void
		1910	DESTROY (SV *self)
		1911	CODE:
		1912	{
		1913	aio_wd wd = SvAIO_WD (self);
		1914	#if HAVE_AT
		1915	{
		1916	SV *callback = &PL_sv_undef;
		1917	dREQ; /* clobbers next_pri :/ */
		1918	next_pri = req->pri; /* restore next_pri */
		1919	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1920	req->type = EIO_WD_CLOSE;
		1921	req->wd = wd;
		1922	REQ_SEND;
		1923	}
		1924	#else
		1925	eio_wd_close_sync (wd);
		1926	#endif
		1927	}
1446		1928
1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1929	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1448		1930
1449	void	1931	void
1450	cancel (aio_req_ornot req)	1932	cancel (aio_req_ornot req)
1451	CODE:	1933	CODE:
1452	req_cancel (req);	1934	eio_cancel (req);
1453		1935
1454	void	1936	void
1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1937	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1456	CODE:	1938	PPCODE:
		1939	{
		1940	if (GIMME_V != G_VOID)
		1941	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1942
		1943	if (items > 1)
		1944	{
		1945	SV *cb_cv =get_cb (callback);
		1946
1457	SvREFCNT_dec (req->callback);	1947	SvREFCNT_dec (req->callback);
1458	req->callback = newSVsv (callback);	1948	req->callback = SvREFCNT_inc (cb_cv);
		1949	}
		1950	}
1459		1951
1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1952	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1461		1953
1462	void	1954	void
1463	add (aio_req grp, ...)	1955	add (aio_req grp, ...)
1464	PPCODE:	1956	PPCODE:
1465	{	1957	{
1466	int i;	1958	int i;
1467	aio_req req;
1468		1959
1469	if (grp->fd == 2)	1960	if (grp->int1 == 2)
1470	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1961	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1471		1962
1472	for (i = 1; i < items; ++i )	1963	for (i = 1; i < items; ++i )
1473	{	1964	{
		1965	aio_req req;
		1966
1474	if (GIMME_V != G_VOID)	1967	if (GIMME_V != G_VOID)
1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1968	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1476		1969
1477	req = SvAIO_REQ (ST (i));	1970	req = SvAIO_REQ (ST (i));
1478		1971
1479	if (req)	1972	if (req)
1480	{	1973	eio_grp_add (grp, req);
1481	++grp->length;
1482	req->grp = grp;
1483
1484	req->grp_prev = 0;
1485	req->grp_next = grp->grp_first;
1486
1487	if (grp->grp_first)
1488	grp->grp_first->grp_prev = req;
1489
1490	grp->grp_first = req;
1491	}
1492	}	1974	}
1493	}	1975	}
1494		1976
1495	void	1977	void
1496	cancel_subs (aio_req_ornot req)	1978	cancel_subs (aio_req_ornot req)
…		…
1500	void	1982	void
1501	result (aio_req grp, ...)	1983	result (aio_req grp, ...)
1502	CODE:	1984	CODE:
1503	{	1985	{
1504	int i;	1986	int i;
		1987	AV *av;
		1988
		1989	grp->errorno = errno;
		1990
1505	AV *av = newAV ();	1991	av = newAV ();
		1992	av_extend (av, items - 1);
1506		1993
1507	for (i = 1; i < items; ++i )	1994	for (i = 1; i < items; ++i )
1508	av_push (av, newSVsv (ST (i)));	1995	av_push (av, newSVsv (ST (i)));
1509		1996
1510	SvREFCNT_dec (grp->data);	1997	SvREFCNT_dec (grp->sv1);
1511	grp->data = (SV *)av;	1998	grp->sv1 = (SV *)av;
1512	}	1999	}
		2000
		2001	void
		2002	errno (aio_req grp, int errorno = errno)
		2003	CODE:
		2004	grp->errorno = errorno;
1513		2005
1514	void	2006	void
1515	limit (aio_req grp, int limit)	2007	limit (aio_req grp, int limit)
1516	CODE:	2008	CODE:
1517	grp->fd2 = limit;	2009	eio_grp_limit (grp, limit);
1518	aio_grp_feed (grp);
1519		2010
1520	void	2011	void
1521	feed (aio_req grp, SV *callback=&PL_sv_undef)	2012	feed (aio_req grp, SV *callback=&PL_sv_undef)
1522	CODE:	2013	CODE:
1523	{	2014	{
1524	SvREFCNT_dec (grp->fh2);	2015	SvREFCNT_dec (grp->sv2);
1525	grp->fh2 = newSVsv (callback);	2016	grp->sv2 = newSVsv (callback);
		2017	grp->feed = aio_grp_feed;
1526		2018
1527	if (grp->fd2 <= 0)	2019	if (grp->int2 <= 0)
1528	grp->fd2 = 2;	2020	grp->int2 = 2;
1529		2021
1530	aio_grp_feed (grp);	2022	eio_grp_limit (grp, grp->int2);
1531	}	2023	}
1532		2024

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