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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 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	#if __ia64	148	#ifndef makedev
53	# define STACKSIZE 65536	149	# define makedev(maj,min) (((maj) << 8) | (min))
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	150	#endif
		151	#ifndef major
		152	# define major(dev) ((dev) >> 8)
		153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
59		157
60	/* buffer size for various temporary buffers */	158	#if PAGESIZE <= 0
61	#define AIO_BUFSIZE 65536	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
62		161
63	#define dBUF \	162	/*****************************************************************************/
64	char *aio_buf; \	163
65	LOCK (wrklock); \	164	static void
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	165	fiemap (eio_req *req)
67	UNLOCK (wrklock); \	166	{
68	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)
69	return -1;	185	return;
70		186
71	enum {	187	req->ptr1 = fiemap;
72	REQ_QUIT,
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};
84		188
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	189	fiemap->fm_start = req->offs;
86	#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;
87		193
88	typedef struct aio_cb	194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
89	{	195	return;
90	struct aio_cb *volatile next;
91		196
92	SV *data, *callback;	197	if (req->int3 >= 0 /* not autosizing */
93	SV *fh, *fh2;	198	|| !fiemap->fm_mapped_extents /* no more extents */
94	void *dataptr, *data2ptr;	199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
95	Stat_t *statdata;	200	goto done;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99		201
100	STRLEN dataoffset;	202	/* else we have to loop -
101	int type;	203	* it would be tempting (actually I tried that first) to just query the
102	int fd, fd2;	204	* number of extents needed, but linux often feels like not returning all
103	int errorno;	205	* extents, without telling us it left any out. this complicates
104	mode_t mode; /* open */	206	* this quite a bit.
		207	*/
105		208
106	unsigned char flags;	209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
107	unsigned char pri;
108		210
109	SV *self; /* the perl counterpart of this request, if any */	211	for (;;)
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
111	} aio_cb;
112
113	enum {
114	FLAG_CANCELLED = 0x01,
115	};
116
117	typedef aio_cb *aio_req;
118	typedef aio_cb *aio_req_ornot;
119
120	enum {
121	PRI_MIN = -4,
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{	212	{
165	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) */
166	wrk->dirp = 0;	214	char scratch[3072];
167	}	215	struct fiemap *incmap = (struct fiemap *)scratch;
168		216
169	if (wrk->dbuf)	217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
170	{	218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
171	free (wrk->dbuf);	219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
172	wrk->dbuf = 0;	220	incmap->fm_flags = fiemap->fm_flags;
173	}	221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
174	}
175		222
176	static void worker_free (worker *wrk)	223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;	224	return;
223		225
224	--q->size;	226	if (!incmap->fm_mapped_extents)
		227	goto done;
225		228
226	for (pri = NUM_PRI; pri--; )	229	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
227	{	230	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
228	aio_req req = q->qs[pri];	231	errno = ENOMEM;
229
230	if (req)	232	if (!fiemap)
		233	return;
		234
		235	req->ptr1 = fiemap;
		236
		237	for (count = 0; count < incmap->fm_mapped_extents; ++count)
231	{	238	{
232	if (!(q->qs[pri] = req->next))	239	struct fiemap_extent *e = incmap->fm_extents + count;
233	q->qe[pri] = 0;
234		240
235	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
236	}	249	}
237	}	250	}
238		251
239	abort ();	252	done:
240	}	253	req->result = 0;
241		254
242	static int poll_cb ();	255	#else
243	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
244	static void req_free (aio_req req);	276	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	277	static void req_cancel (aio_req req);
246		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
247	/* must be called at most once */	293	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	294	static SV *
		295	req_sv (aio_req req, HV *stash)
249	{	296	{
250	if (!req->self)	297	if (!req->self)
251	{	298	{
252	req->self = (SV *)newHV ();	299	req->self = (SV *)newHV ();
253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	300	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254	}	301	}
255		302
256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	303	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
257	}	304	}
258		305
259	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)
260	{	314	{
261	MAGIC *mg;	315	MAGIC *mg;
262		316
263	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")))
264	croak ("object of class " AIO_REQ_KLASS " expected");	322	croak ("object of class IO::AIO::REQ expected");
265		323
266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	324	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267		325
268	return mg ? (aio_req)mg->mg_ptr : 0;	326	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	327	}
270		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
271	static void aio_grp_feed (aio_req grp)	341	aio_grp_feed (aio_req grp)
272	{	342	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	343	if (grp->sv2 && SvOK (grp->sv2))
274	{	344	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	345	dSP;
280		346
281	ENTER;	347	ENTER;
282	SAVETMPS;	348	SAVETMPS;
283	PUSHMARK (SP);	349	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	350	XPUSHs (req_sv (grp, aio_grp_stash));
285	PUTBACK;	351	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	352	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	353	SPAGAIN;
288	FREETMPS;	354	FREETMPS;
289	LEAVE;	355	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	356	}
300	}	357	}
301		358
302	static void aio_grp_dec (aio_req grp)	359	static void
		360	req_submit (eio_req *req)
303	{	361	{
304	--grp->length;	362	eio_submit (req);
305		363
306	/* call feeder, if applicable */	364	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	365	{
312	req_invoke (grp);	366	dSP;
313	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);
314	}	374	}
315	}	375	}
316		376
317	static void poll_wait ()	377	static int
		378	req_invoke (eio_req *req)
318	{	379	{
319	fd_set rfd;	380	if (req->flags & FLAG_SV2_RO_OFF)
		381	SvREADONLY_off (req->sv2);
320		382
321	while (nreqs)	383	if (!EIO_CANCELLED (req) && req->callback)
322	{	384	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;	385	dSP;
345		386	static SV *sv_result_cache; /* caches the result integer SV */
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	387	SV *sv_result;
347	{
348	errno = req->errorno;
349		388
350	ENTER;	389	ENTER;
351	SAVETMPS;	390	SAVETMPS;
352	PUSHMARK (SP);	391	PUSHMARK (SP);
353	EXTEND (SP, 1);	392	EXTEND (SP, 1);
354		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
355	switch (req->type)	407	switch (req->type)
356	{	408	{
		409	case EIO_WD_OPEN:
		410	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		411	break;
		412
357	case REQ_READDIR:	413	case EIO_READDIR:
358	{	414	{
359	SV *rv = &PL_sv_undef;	415	SV *rv = &PL_sv_undef;
360		416
361	if (req->result >= 0)	417	if (req->result >= 0)
362	{	418	{
363	int i;	419	int i;
364	char *buf = req->data2ptr;	420	char *names = (char *)req->ptr2;
		421	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
365	AV *av = newAV ();	422	AV *av = newAV ();
366		423
367	av_extend (av, req->result - 1);	424	av_extend (av, req->result - 1);
368		425
369	for (i = 0; i < req->result; ++i)	426	for (i = 0; i < req->result; ++i)
370	{	427	{
371	SV *sv = newSVpv (buf, 0);	428	if (req->int1 & EIO_READDIR_DENTS)
		429	{
		430	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
372		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
373	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);
374	buf += SvCUR (sv) + 1;	460	names += SvCUR (name) + 1;
		461	}
375	}	462	}
376		463
377	rv = sv_2mortal (newRV_noinc ((SV *)av));	464	rv = sv_2mortal (newRV_noinc ((SV *)av));
378	}	465	}
379		466
380	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))));
381	}	471	}
382	break;	472	break;
383		473
384	case REQ_OPEN:	474	case EIO_OPEN:
385	{	475	{
386	/* convert fd to fh */	476	/* convert fd to fh */
387	SV *fh;	477	SV *fh = &PL_sv_undef;
388		478
389	PUSHs (sv_2mortal (newSViv (req->result)));	479	if (req->result >= 0)
390	PUTBACK;	480	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	481	GV *gv = (GV *)sv_newmortal ();
392	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);
393		488
394	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	);
395		496
		497	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		498	fh = (SV *)gv;
		499	}
		500
396	PUSHMARK (SP);	501	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	502	}
399	break;	503	break;
400		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
401	case REQ_GROUP:	542	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	543	req->int1 = 2; /* mark group as finished */
403		544
404	if (req->data)	545	if (req->sv1)
405	{	546	{
406	int i;	547	int i;
407	AV *av = (AV *)req->data;	548	AV *av = (AV *)req->sv1;
408		549
409	EXTEND (SP, AvFILL (av) + 1);	550	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	551	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	552	PUSHs (*av_fetch (av, i, 0));
412	}	553	}
413	break;	554	break;
414		555
415	case REQ_NOP:	556	case EIO_NOP:
416	case REQ_BUSY:	557	case EIO_BUSY:
417	break;	558	break;
418		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
419	default:	637	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	638	PUSHs (sv_result);
421	break;	639	break;
422	}	640	}
423		641
		642	errno = req->errorno;
424		643
425	PUTBACK;	644	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	645	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	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;
428		652
429	FREETMPS;	653	FREETMPS;
430	LEAVE;	654	LEAVE;
		655
		656	PUTBACK;
431	}	657	}
432		658
433	if (req->grp)	659	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	660	}
453		661
454	static void req_free (aio_req req)	662	static void
		663	req_destroy (aio_req req)
455	{	664	{
456	if (req->self)	665	if (req->self)
457	{	666	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	667	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	668	SvREFCNT_dec (req->self);
460	}	669	}
461		670
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	671	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	672	SvREFCNT_dec (req->sv2);
		673	SvREFCNT_dec (req->sv3);
		674	SvREFCNT_dec (req->sv4);
465	SvREFCNT_dec (req->callback);	675	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467		676
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470
471	Safefree (req);	677	free (req);
472	}	678	}
473		679
		680	static void
474	static void req_cancel_subs (aio_req grp)	681	req_cancel_subs (aio_req grp)
475	{	682	{
476	aio_req sub;
477
478	if (grp->type != REQ_GROUP)	683	if (grp->type != EIO_GROUP)
479	return;	684	return;
480		685
481	SvREFCNT_dec (grp->fh2);	686	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	687	grp->sv2 = 0;
483		688
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	689	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	690	}
487		691
488	static void req_cancel (aio_req req)	692	static void ecb_cold
		693	create_respipe (void)
489	{	694	{
490	req->flags |= FLAG_CANCELLED;	695	if (s_epipe_renew (&respipe))
491		696	croak ("IO::AIO: unable to initialize result pipe");
492	req_cancel_subs (req);
493	}	697	}
494		698
495	static int poll_cb ()	699	static void
		700	poll_wait (void)
496	{	701	{
497	dSP;	702	while (eio_nreqs ())
498	int count = 0;	703	{
499	int do_croak = 0;	704	int size;
500	aio_req req;
501		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	{
502	for (;;)	722	for (;;)
503	{	723	{
504	LOCK (reslock);	724	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		725
507	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)
508	{	837	{
509	if (!res_queue.size)	838	path = AvARRAY (rv)[1];
		839	wdob = AvARRAY (rv)[0];
		840
		841	if (SvOK (wdob))
510	{	842	{
511	/* read any signals sent by the worker threads */	843	*wd = SvAIO_WD (wdob);
512	char buf [32];	844	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}	845	}
		846	else
		847	*wd = EIO_INVALID_WD;
516	}	848	}
517		849	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
518	UNLOCK (reslock);
519
520	if (!req)
521	break;
522
523	--nreqs;
524
525	if (req->type == REQ_QUIT)
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{	850	{
529	req->fd = 1; /* mark request as delayed */	851	*wd = (aio_wd)(long)SvIVX (rv);
530	continue;	852	*wdsv = SvREFCNT_inc_NN (rv);
		853	*ptr = ".";
		854	return; /* path set to "." */
531	}	855	}
532	else	856	else
533	{	857	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	858	}
554		859
555	return count;	860	*pathsv = newSVsv (path);
		861	*ptr = SvPVbyte_nolen (*pathsv);
556	}	862	}
557		863
558	static void *aio_proc(void *arg);	864	static void ecb_noinline
559		865	req_set_path1 (aio_req req, SV *path)
560	static void start_thread (void)
561	{	866	{
562	sigset_t fullsigset, oldsigset;	867	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
563	pthread_attr_t attr;	868	}
564		869
565	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;
566		874
567	if (!wrk)	875	switch (SvTYPE (rv))
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{	876	{
581	wrk->prev = &wrk_first;	877	case SVt_PVIO:
582	wrk->next = wrk_first.next;	878	case SVt_PVLV:
583	wrk_first.next->prev = wrk;	879	case SVt_PVGV:
584	wrk_first.next = wrk;	880	req->type = type_fh;
585	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;
586	}	889	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}	890	}
593		891
594	static void req_send (aio_req req)	892	XS(boot_IO__AIO) ecb_cold;
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598		893
599	++nreqs;	894	MODULE = IO::AIO PACKAGE = IO::AIO
600		895
601	LOCK (reqlock);	896	PROTOTYPES: ENABLE
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606		897
607	static void end_thread (void)	898	BOOT:
608	{	899	{
609	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 },
610		907
611	Newz (0, req, 1, aio_cb);	908	/* you have to re-run ./gendef0 after adding/Removing any constants here */
612		909
613	req->type = REQ_QUIT;	910	const_iv (ENOSYS)
614	req->pri = PRI_MAX + PRI_BIAS;	911	const_iv (EXDEV)
		912	const_iv (EBADR)
615		913
616	req_send (req);	914	const_iv (O_RDONLY)
617	}	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)
618		921
619	static void min_parallel (int nthreads)	922	const_iv (O_ASYNC)
620	{	923	const_iv (O_DIRECT)
621	if (wanted < nthreads)	924	const_iv (O_NOATIME)
622	wanted = nthreads;
623	}
624		925
625	static void max_parallel (int nthreads)	926	const_iv (O_CLOEXEC)
626	{	927	const_iv (O_NOCTTY)
627	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)
628		937
629	if (wanted > nthreads)	938	const_iv (S_IFIFO)
630	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)
631		947
632	while (cur > wanted)	948	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
633	{	949	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
634	end_thread ();	950	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
635	cur--;	951	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
636	}	952	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		953	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
637		954
638	while (started > wanted)	955	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
639	{	956	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
640	poll_wait ();	957	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
641	poll_cb ();	958	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
642	}	959	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
643	}
644		960
645	static void create_pipe ()	961	const_iv (ST_RDONLY)
646	{	962	const_iv (ST_NOSUID)
647	if (pipe (respipe))	963	const_iv (ST_NODEV)
648	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)
649		973
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	974	const_iv (PROT_NONE)
651	croak ("cannot set result pipe to nonblocking mode");	975	const_iv (PROT_EXEC)
		976	const_iv (PROT_READ)
		977	const_iv (PROT_WRITE)
652		978
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	979	/*const_iv (MAP_FIXED)*/
654	croak ("cannot set result pipe to nonblocking mode");	980	const_iv (MAP_PRIVATE)
655	}	981	const_iv (MAP_SHARED)
		982	const_iv (MAP_ANONYMOUS)
656		983
657	/*****************************************************************************/	984	/* linuxish */
658	/* 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)
659		990
660	#if !HAVE_PREADWRITE	991	const_iv (FIEMAP_FLAG_SYNC)
661	# define pread aio_pread	992	const_iv (FIEMAP_FLAG_XATTR)
662	# 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)
663		1005
664	/*	1006	const_iv (SPLICE_F_MOVE)
665	* make our pread/pwrite safe against themselves, but not against	1007	const_iv (SPLICE_F_NONBLOCK)
666	* normal read/write by using a mutex. slows down execution a lot,	1008	const_iv (SPLICE_F_MORE)
667	* but that's your problem, not mine.	1009	const_iv (SPLICE_F_GIFT)
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670		1010
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1011	const_iv (SEEK_DATA)
672	{	1012	const_iv (SEEK_HOLE)
673	ssize_t res;
674	off_t ooffset;
675		1013
676	LOCK (preadwritelock);	1014	/* libeio constants */
677	ooffset = lseek (fd, 0, SEEK_CUR);	1015	const_eio (SEEK_SET)
678	lseek (fd, offset, SEEK_SET);	1016	const_eio (SEEK_CUR)
679	res = read (fd, buf, count);	1017	const_eio (SEEK_END)
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682		1018
683	return res;	1019	const_eio (MCL_FUTURE)
684	}	1020	const_eio (MCL_CURRENT)
685		1021
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1022	const_eio (MS_ASYNC)
687	{	1023	const_eio (MS_INVALIDATE)
688	ssize_t res;	1024	const_eio (MS_SYNC)
689	off_t ooffset;
690		1025
691	LOCK (preadwritelock);	1026	const_eio (MT_MODIFY)
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697		1027
698	return res;	1028	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
699	}	1029	const_eio (SYNC_FILE_RANGE_WRITE)
700	#endif	1030	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
701		1031
702	#if !HAVE_FDATASYNC	1032	const_eio (FALLOC_FL_KEEP_SIZE)
703	# define fdatasync fsync	1033	const_eio (FALLOC_FL_PUNCH_HOLE)
704	#endif
705		1034
706	#if !HAVE_READAHEAD	1035	const_eio (READDIR_DENTS)
707	# define readahead aio_readahead	1036	const_eio (READDIR_DIRS_FIRST)
		1037	const_eio (READDIR_STAT_ORDER)
		1038	const_eio (READDIR_FOUND_UNKNOWN)
708		1039
709	static ssize_t readahead (int fd, off_t offset, size_t count)	1040	const_eio (DT_UNKNOWN)
710	{	1041	const_eio (DT_FIFO)
711	dBUF;	1042	const_eio (DT_CHR)
712		1043	const_eio (DT_DIR)
713	while (count > 0)	1044	const_eio (DT_BLK)
714	{	1045	const_eio (DT_REG)
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	1046	const_eio (DT_LNK)
716		1047	const_eio (DT_SOCK)
717	pread (fd, aio_buf, len, offset);	1048	const_eio (DT_WHT)
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}	1049	};
781		1050
782	# elif __hpux	1051	aio_stash = gv_stashpv ("IO::AIO" , 1);
783	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);
784		1055
785	# elif __solaris	1056	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
786	{	1057	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
787	struct sendfilevec vec;
788	size_t sbytes;
789		1058
790	vec.sfv_fd = ifd;	1059	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794		1060
795	res = sendfilev (ofd, &vec, 1, &sbytes);	1061	reinit ();
		1062	}
796		1063
797	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;
798	res = sbytes;	1165	req->size = nbytes;
799	}	1166	req->int2 = flags;
800		1167
801	# 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
802	#else	1203	#else
803	res = -1;	1204	pipe (pipefd) < 0
804	errno = ENOSYS;	1205	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
805	#endif	1206	#endif
806		1207	|| close (pipefd [1]) < 0
807	if (res < 0
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817
818	res = 0;
819
820	while (count)
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826	if (cnt <= 0)
827	{	1208	)
828	if (cnt && !res) res = -1;	1209	abort (); /*D*/
829	break;
830	}
831		1210
832	cnt = write (ofd, aio_buf, cnt);	1211	close_fd = pipefd [0];
833
834	if (cnt <= 0)
835	{
836	if (cnt && !res) res = -1;
837	break;
838	}
839
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;
847	}
848
849	/* read a full directory */
850	static void scandir_ (aio_req req, worker *self)
851	{
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}	1212	}
903	}
904		1213
905	if (errno)	1214	req->type = EIO_DUP2;
906	res = -1;	1215	req->int1 = close_fd;
907		1216	req->sv2 = newSVsv (fh);
908	req->result = res;	1217	req->int2 = fd;
909	}
910		1218
911	/*****************************************************************************/	1219	REQ_SEND;
912
913	static void *aio_proc (void *thr_arg)
914	{
915	aio_req req;
916	int type;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}	1220	}
1004		1221
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)
1034	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();
1060
1061	atfork_parent ();
1062	}
1063
1064	#define dREQ \
1065	aio_req req; \
1066	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
1068	\
1069	if (SvOK (callback) && !SvROK (callback)) \
1070	croak ("callback must be undef or of reference type"); \
1071	\
1072	Newz (0, req, 1, aio_cb); \
1073	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \
1075	\
1076	req->callback = newSVsv (callback); \
1077	req->pri = req_pri
1078
1079	#define REQ_SEND \
1080	req_send (req); \
1081	\
1082	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084
1085	MODULE = IO::AIO PACKAGE = IO::AIO
1086
1087	PROTOTYPES: ENABLE
1088
1089	BOOT:
1090	{
1091	HV *stash = gv_stashpv ("IO::AIO", 1);
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1095
1096	create_pipe ();
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1098	}
1099
1100	void	1222	void
1101	min_parallel (nthreads)	1223	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1102	int nthreads	1224	PPCODE:
1103	PROTOTYPE: $
1104
1105	void
1106	max_parallel (nthreads)
1107	int nthreads
1108	PROTOTYPE: $
1109
1110	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$
1117	PPCODE:
1118	{	1225	{
		1226	int fd = s_fileno_croak (fh, 0);
1119	dREQ;	1227	dREQ;
1120		1228
1121	req->type = REQ_OPEN;	1229	req->type = EIO_SEEK;
1122	req->data = newSVsv (pathname);	1230	req->sv1 = newSVsv (fh);
1123	req->dataptr = SvPVbyte_nolen (req->data);	1231	req->int1 = fd;
1124	req->fd = flags;	1232	req->offs = SvVAL64 (offset);
1125	req->mode = mode;	1233	req->int2 = whence;
1126		1234
1127	REQ_SEND;	1235	REQ_SEND;
1128	}	1236	}
1129		1237
1130	void	1238	void
1131	aio_close (fh,callback=&PL_sv_undef)	1239	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$
1135	ALIAS:	1240	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC
1139	PPCODE:
1140	{
1141	dREQ;
1142
1143	req->type = ix;
1144	req->fh = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146
1147	REQ_SEND (req);
1148	}
1149
1150	void
1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:
1159	aio_read = REQ_READ	1241	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	1242	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$
1162	PPCODE:	1243	PPCODE:
1163	{	1244	{
1164	aio_req req;
1165	STRLEN svlen;	1245	STRLEN svlen;
		1246	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1166	char *svptr = SvPVbyte (data, svlen);	1247	char *svptr = SvPVbyte (data, svlen);
1167		1248	UV len = SvUV (length);
1168	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);
1170		1249
1171	if (dataoffset < 0)	1250	if (dataoffset < 0)
1172	dataoffset += svlen;	1251	dataoffset += svlen;
1173		1252
1174	if (dataoffset < 0 || dataoffset > svlen)	1253	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	1254	croak ("dataoffset outside of data scalar");
1176		1255
1177	if (ix == REQ_WRITE)	1256	if (ix == EIO_WRITE)
1178	{	1257	{
1179	/* write: check length and adjust. */	1258	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	1259	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	1260	len = svlen - dataoffset;
1182	}	1261	}
1183	else	1262	else
1184	{	1263	{
1185	/* 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))
1186	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");
1187	}	1270	}
1188
1189	if (length < 0)
1190	croak ("length must not be negative");
1191		1271
1192	{	1272	{
1193	dREQ;	1273	dREQ;
1194		1274
1195	req->type = ix;	1275	req->type = ix;
1196	req->fh = newSVsv (fh);	1276	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1277	req->int1 = fd;
1198	: IoOFP (sv_2io (fh)));	1278	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	1279	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	1280	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	1281	req->ptr2 = (char *)svptr + dataoffset;
		1282	req->stroffset = dataoffset;
1203		1283
1204	if (!SvREADONLY (data))	1284	if (!SvREADONLY (data))
1205	{	1285	{
1206	SvREADONLY_on (data);	1286	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	1287	req->flags |= FLAG_SV2_RO_OFF;
1208	}	1288	}
1209		1289
1210	REQ_SEND;	1290	REQ_SEND;
1211	}	1291	}
1212	}	1292	}
1213		1293
1214	void	1294	void
1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1295	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1216	SV * out_fh	1296	ALIAS:
1217	SV * in_fh	1297	aio_readlink = EIO_READLINK
1218	UV in_offset	1298	aio_realpath = EIO_REALPATH
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$
1222	PPCODE:	1299	PPCODE:
1223	{	1300	{
		1301	dREQ;
		1302
		1303	req->type = ix;
		1304	req_set_path1 (req, pathname);
		1305
		1306	REQ_SEND;
		1307	}
		1308
		1309	void
		1310	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1311	PPCODE:
		1312	{
		1313	int ifd = s_fileno_croak (in_fh , 0);
		1314	int ofd = s_fileno_croak (out_fh, 1);
1224	dREQ;	1315	dREQ;
1225		1316
1226	req->type = REQ_SENDFILE;	1317	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	1318	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1319	req->int1 = ofd;
1229	req->fh2 = newSVsv (in_fh);	1320	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1321	req->int2 = ifd;
1231	req->offset = in_offset;	1322	req->offs = in_offset;
1232	req->length = length;	1323	req->size = length;
1233		1324
1234	REQ_SEND;	1325	REQ_SEND;
1235	}	1326	}
1236		1327
1237	void	1328	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1329	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$
1244	PPCODE:	1330	PPCODE:
1245	{	1331	{
		1332	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	1333	dREQ;
1247		1334
1248	req->type = REQ_READAHEAD;	1335	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	1336	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1337	req->int1 = fd;
1251	req->offset = offset;	1338	req->offs = offset;
1252	req->length = length;	1339	req->size = length;
1253		1340
1254	REQ_SEND;	1341	REQ_SEND;
1255	}	1342	}
1256		1343
1257	void	1344	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	1345	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	1346	ALIAS:
1262	aio_stat = REQ_STAT	1347	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	1348	aio_lstat = EIO_LSTAT
		1349	aio_statvfs = EIO_STATVFS
1264	PPCODE:	1350	PPCODE:
1265	{	1351	{
1266	dREQ;	1352	dREQ;
1267		1353
1268	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);
1269	if (!req->statdata)
1270	{
1271	req_free (req);
1272	croak ("out of memory during aio_req->statdata allocation");
1273	}
1274
1275	if (SvPOK (fh_or_path))
1276	{
1277	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);
1280	}
1281	else
1282	{
1283	req->type = REQ_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}
1287		1355
1288	REQ_SEND;	1356	REQ_SEND;
1289	}	1357	}
1290		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
1291	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
1292	aio_unlink (pathname,callback=&PL_sv_undef)	1456	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	1457	ALIAS:
1296	aio_unlink = REQ_UNLINK	1458	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	1459	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	1460	aio_readdir = EIO_READDIR
1299	PPCODE:	1461	PPCODE:
1300	{	1462	{
1301	dREQ;	1463	dREQ;
1302		1464
1303	req->type = ix;	1465	req->type = ix;
1304	req->data = newSVsv (pathname);	1466	req_set_path1 (req, pathname);
1305	req->dataptr = SvPVbyte_nolen (req->data);	1467
1306
1307	REQ_SEND;	1468	REQ_SEND;
1308	}	1469	}
1309		1470
1310	void	1471	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1472	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:	1473	ALIAS:
1316	aio_link = REQ_LINK	1474	aio_link = EIO_LINK
1317	aio_symlink = REQ_SYMLINK	1475	aio_symlink = EIO_SYMLINK
1318	aio_rename = REQ_RENAME	1476	aio_rename = EIO_RENAME
1319	PPCODE:	1477	PPCODE:
1320	{	1478	{
		1479	eio_wd wd2 = 0;
1321	dREQ;	1480	dREQ;
1322		1481
1323	req->type = ix;	1482	req->type = ix;
1324	req->fh = newSVsv (oldpath);	1483	req_set_path1 (req, oldpath);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	1484	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1326	req->data = newSVsv (newpath);	1485	req->int3 = (long)wd2;
1327	req->dataptr = SvPVbyte_nolen (req->data);
1328		1486
1329	REQ_SEND;	1487	REQ_SEND;
1330	}	1488	}
1331		1489
1332	void	1490	void
1333	aio_busy (delay,callback=&PL_sv_undef)	1491	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	1492	PPCODE:
1337	{	1493	{
1338	dREQ;	1494	dREQ;
1339		1495
1340	req->type = REQ_BUSY;	1496	req->type = EIO_MKNOD;
1341	req->fd = delay < 0. ? 0 : delay;	1497	req->int2 = (mode_t)mode;
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1498	req->offs = dev;
1343		1499	req_set_path1 (req, pathname);
		1500
1344	REQ_SEND;	1501	REQ_SEND;
1345	}	1502	}
1346		1503
1347	void	1504	void
1348	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)
1349	SV * callback	1506	ALIAS:
1350	PROTOTYPE: ;$	1507	aio_mtouch = EIO_MTOUCH
		1508	aio_msync = EIO_MSYNC
1351	PPCODE:	1509	PPCODE:
1352	{	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);
1353	dREQ;	1583	dREQ;
1354		1584
1355	req->type = REQ_GROUP;	1585	req->type = EIO_CUSTOM;
1356	req_send (req);	1586	req->sv1 = newSVsv (fh);
		1587	req->int1 = fd;
1357		1588
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1589	req->feed = fiemap;
1359	}	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
1360		1597
		1598	REQ_SEND;
		1599	}
		1600
1361	void	1601	void
1362	aio_nop (callback=&PL_sv_undef)	1602	aio_busy (double delay, SV *callback=&PL_sv_undef)
1363	SV * callback
1364	PPCODE:	1603	PPCODE:
1365	{	1604	{
1366	dREQ;	1605	dREQ;
1367		1606
1368	req->type = REQ_NOP;	1607	req->type = EIO_BUSY;
		1608	req->nv1 = delay < 0. ? 0. : delay;
1369		1609
1370	REQ_SEND;	1610	REQ_SEND;
1371	}	1611	}
1372		1612
1373	void	1613	void
1374	aioreq_pri (int pri = DEFAULT_PRI)	1614	aio_group (SV *callback=&PL_sv_undef)
1375	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	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	1648	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	1649	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	1650	next_pri = pri;
		1651	}
		1652	OUTPUT:
		1653	RETVAL
1379		1654
1380	void	1655	void
1381	aioreq_nice (int nice = 0)	1656	aioreq_nice (int nice = 0)
1382	CODE:	1657	CODE:
1383	nice = next_pri - nice;	1658	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	1659	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	1660	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	1661	next_pri = nice;
1387		1662
1388	void	1663	void
1389	flush ()	1664	flush ()
1390	PROTOTYPE:
1391	CODE:	1665	CODE:
1392	while (nreqs)	1666	while (eio_nreqs ())
1393	{	1667	{
1394	poll_wait ();	1668	poll_wait ();
1395	poll_cb ();	1669	poll_cb ();
1396	}	1670	}
1397		1671
1398	void	1672	int
1399	poll()	1673	poll ()
1400	PROTOTYPE:
1401	CODE:	1674	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	1675	poll_wait ();
1405	poll_cb ();	1676	RETVAL = poll_cb ();
1406	}
1407
1408	int
1409	poll_fileno()
1410	PROTOTYPE:
1411	CODE:
1412	RETVAL = respipe [0];
1413	OUTPUT:	1677	OUTPUT:
1414	RETVAL	1678	RETVAL
1415		1679
1416	int	1680	int
		1681	poll_fileno ()
		1682	CODE:
		1683	RETVAL = s_epipe_fd (&respipe);
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	int
1417	poll_cb(...)	1688	poll_cb (...)
1418	PROTOTYPE:	1689	PROTOTYPE:
1419	CODE:	1690	CODE:
1420	RETVAL = poll_cb ();	1691	RETVAL = poll_cb ();
1421	OUTPUT:	1692	OUTPUT:
1422	RETVAL	1693	RETVAL
1423		1694
1424	void	1695	void
1425	poll_wait()	1696	poll_wait ()
1426	PROTOTYPE:
1427	CODE:	1697	CODE:
1428	if (nreqs)
1429	poll_wait ();	1698	poll_wait ();
1430		1699
1431	int	1700	int
1432	nreqs()	1701	nreqs ()
1433	PROTOTYPE:
1434	CODE:	1702	CODE:
1435	RETVAL = nreqs;	1703	RETVAL = eio_nreqs ();
1436	OUTPUT:	1704	OUTPUT:
1437	RETVAL	1705	RETVAL
1438		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
1439	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	}
1440		1928
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1929	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1930
1443	void	1931	void
1444	cancel (aio_req_ornot req)	1932	cancel (aio_req_ornot req)
1445	CODE:	1933	CODE:
1446	req_cancel (req);	1934	eio_cancel (req);
1447		1935
1448	void	1936	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1937	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450	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
1451	SvREFCNT_dec (req->callback);	1947	SvREFCNT_dec (req->callback);
1452	req->callback = newSVsv (callback);	1948	req->callback = SvREFCNT_inc (cb_cv);
		1949	}
		1950	}
1453		1951
1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1952	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455		1953
1456	void	1954	void
1457	add (aio_req grp, ...)	1955	add (aio_req grp, ...)
1458	PPCODE:	1956	PPCODE:
1459	{	1957	{
1460	int i;	1958	int i;
1461	aio_req req;
1462		1959
1463	if (grp->fd == 2)	1960	if (grp->int1 == 2)
1464	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");
1465		1962
1466	for (i = 1; i < items; ++i )	1963	for (i = 1; i < items; ++i )
1467	{	1964	{
		1965	aio_req req;
		1966
1468	if (GIMME_V != G_VOID)	1967	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1968	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1969
1471	req = SvAIO_REQ (ST (i));	1970	req = SvAIO_REQ (ST (i));
1472		1971
1473	if (req)	1972	if (req)
1474	{	1973	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	1974	}
1487	}	1975	}
1488		1976
1489	void	1977	void
1490	cancel_subs (aio_req_ornot req)	1978	cancel_subs (aio_req_ornot req)
…		…
1494	void	1982	void
1495	result (aio_req grp, ...)	1983	result (aio_req grp, ...)
1496	CODE:	1984	CODE:
1497	{	1985	{
1498	int i;	1986	int i;
		1987	AV *av;
		1988
		1989	grp->errorno = errno;
		1990
1499	AV *av = newAV ();	1991	av = newAV ();
		1992	av_extend (av, items - 1);
1500		1993
1501	for (i = 1; i < items; ++i )	1994	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	1995	av_push (av, newSVsv (ST (i)));
1503		1996
1504	SvREFCNT_dec (grp->data);	1997	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	1998	grp->sv1 = (SV *)av;
1506	}	1999	}
		2000
		2001	void
		2002	errno (aio_req grp, int errorno = errno)
		2003	CODE:
		2004	grp->errorno = errorno;
1507		2005
1508	void	2006	void
1509	limit (aio_req grp, int limit)	2007	limit (aio_req grp, int limit)
1510	CODE:	2008	CODE:
1511	grp->fd2 = limit;	2009	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		2010
1514	void	2011	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	2012	feed (aio_req grp, SV *callback=&PL_sv_undef)
1516	CODE:	2013	CODE:
1517	{	2014	{
1518	SvREFCNT_dec (grp->fh2);	2015	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	2016	grp->sv2 = newSVsv (callback);
		2017	grp->feed = aio_grp_feed;
1520		2018
1521	if (grp->fd2 <= 0)	2019	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	2020	grp->int2 = 2;
1523		2021
1524	aio_grp_feed (grp);	2022	eio_grp_limit (grp, grp->int2);
1525	}	2023	}
1526		2024

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