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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.77 by root, Thu Oct 26 13:25:40 2006 UTC vs.
Revision 1.220 by root, Mon Jul 30 16:44:12 2012 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
34	# if __linux	24	#if __linux__
		25	# include <linux/fs.h>
		26	# ifdef FS_IOC_FIEMAP
		27	# include <linux/types.h>
		28	# include <linux/fiemap.h>
		29	# define HAVE_FIEMAP 1
		30	# endif
		31	#endif
		32
		33	/* perl namespace pollution */
		34	#undef VERSION
		35
		36	/* perl stupidly overrides readdir and maybe others */
		37	/* with thread-unsafe versions, imagine that :( */
		38	#undef readdir
		39	#undef opendir
		40	#undef closedir
		41
		42	#ifdef _WIN32
		43
		44	// perl overrides all those nice libc functions
		45
		46	#undef malloc
		47	#undef free
		48	#undef open
		49	#undef read
		50	#undef write
		51	#undef send
		52	#undef recv
		53	#undef stat
		54	#undef lstat
		55	#undef fstat
		56	#undef truncate
		57	#undef ftruncate
		58	#undef open
		59	#undef link
		60	#undef close
		61	#undef unlink
		62	#undef mkdir
		63	#undef rmdir
		64	#undef rename
		65	#undef lseek
		66	#undef opendir
		67	#undef readdir
		68	#undef closedir
		69	#undef chmod
		70	#undef fchmod
		71	#undef dup
		72	#undef dup2
		73	#undef abort
		74	#undef pipe
		75
		76	#define EIO_STRUCT_STAT struct _stati64
		77	#define EIO_STRUCT_STATI64
		78
		79	#else
		80
		81	#include <sys/time.h>
35	# include <sys/sendfile.h>	82	#include <sys/select.h>
36	# elif __freebsd	83	#include <unistd.h>
37	# include <sys/socket.h>	84	#include <utime.h>
38	# include <sys/uio.h>	85	#include <signal.h>
39	# elif __hpux	86
40	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
41	# elif __solaris /* not yet */	88
42	# include <sys/sendfile.h>	89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	SV *sv3, *sv4; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/config.h"
		120	#include "libeio/eio.h"
		121
		122	static int req_invoke (eio_req *req);
		123	#define EIO_FINISH(req) req_invoke (req)
		124	static void req_destroy (eio_req *grp);
		125	#define EIO_DESTROY(req) req_destroy (req)
		126
		127	#include "libeio/eio.c"
		128
		129	#if !HAVE_POSIX_FADVISE
		130	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		131	#endif
		132
		133	#if !HAVE_POSIX_MADVISE
		134	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#ifndef MAP_ANONYMOUS
		138	# ifdef MAP_ANON
		139	# define MAP_ANONYMOUS MAP_ANON
43	# else	140	# else
44	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	142	# endif
46	#endif	143	#endif
47		144
48	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
49	#ifndef NAME_MAX	146	#include "def0.h"
50	# define NAME_MAX 4096
51	#endif
52		147
53	#ifndef PTHREAD_STACK_MIN	148	#ifndef makedev
54	/* care for broken platforms, e.g. windows */	149	# define makedev(maj,min) (((maj) << 8) | (min))
55	# define PTHREAD_STACK_MIN 16384
56	#endif	150	#endif
57		151	#ifndef major
58	#if __ia64	152	# define major(dev) ((dev) >> 8)
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif	153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
65		157
66	/* buffer size for various temporary buffers */	158	#ifndef PAGESIZE
67	#define AIO_BUFSIZE 65536	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
68		161
69	#define dBUF \	162	/*****************************************************************************/
70	char *aio_buf; \	163
71	LOCK (wrklock); \	164	static void
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	165	fiemap (eio_req *req)
73	UNLOCK (wrklock); \	166	{
74	if (!aio_buf) \	167	req->result = -1;
		168
		169	#if HAVE_FIEMAP
		170	/* assume some c99 */
		171	struct fiemap *fiemap = 0;
		172	size_t end_offset;
		173	int count = req->int3;
		174
		175	req->flags |= EIO_FLAG_PTR1_FREE;
		176
		177	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		178	/* increase in 3.5kb steps */
		179	if (count < 0)
		180	count = 8;
		181
		182	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		183	errno = ENOMEM;
		184	if (!fiemap)
75	return -1;	185	return;
76		186
77	enum {	187	req->ptr1 = fiemap;
78	REQ_QUIT,
79	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
83	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85	REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,
87	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,
89	};
90		188
91	#define AIO_REQ_KLASS "IO::AIO::REQ"	189	fiemap->fm_start = req->offs;
92	#define AIO_GRP_KLASS "IO::AIO::GRP"	190	fiemap->fm_length = req->size;
		191	fiemap->fm_flags = req->int2;
		192	fiemap->fm_extent_count = count;
93		193
94	typedef struct aio_cb	194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
95	{	195	return;
96	struct aio_cb *volatile next;
97		196
98	SV *data, *callback;	197	if (req->int3 >= 0 /* not autosizing */
99	SV *fh, *fh2;	198	|| !fiemap->fm_mapped_extents /* no more extents */
100	void *dataptr, *data2ptr;	199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
101	Stat_t *statdata;	200	goto done;
102	off_t offset;
103	size_t length;
104	ssize_t result;
105		201
106	STRLEN dataoffset;	202	/* else we have to loop -
107	int type;	203	* it would be tempting (atcually I tried that first) to just query the
108	int fd, fd2;	204	* number of extents needed, but linux often feels like not returning all
109	int errorno;	205	* extents, without telling us it left any out. this complicates
110	mode_t mode; /* open */	206	* this quite a bit.
		207	*/
111		208
112	unsigned char flags;	209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
113	unsigned char pri;
114		210
115	SV *self; /* the perl counterpart of this request, if any */	211	for (;;)
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
117	} aio_cb;
118
119	enum {
120	FLAG_CANCELLED = 0x01,
121	};
122
123	typedef aio_cb *aio_req;
124	typedef aio_cb *aio_req_ornot;
125
126	enum {
127	PRI_MIN = -4,
128	PRI_MAX = 4,
129
130	DEFAULT_PRI = 0,
131	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};
134
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
137	static int started, wanted;
138	static volatile int nreqs;
139	static int respipe [2];
140
141	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
142	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
143	#else
144	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
145	#endif
146
147	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
148	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
149
150	/* worker threads management */
151	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
152
153	typedef struct worker {
154	/* locked by wrklock */
155	struct worker *prev, *next;
156
157	pthread_t tid;
158
159	/* locked by reslock, reqlock or wrklock */
160	aio_req req; /* currently processed request */
161	void *dbuf;
162	DIR *dirp;
163	} worker;
164
165	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
166
167	static void worker_clear (worker *wrk)
168	{
169	if (wrk->dirp)
170	{	212	{
171	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) */
172	wrk->dirp = 0;	214	char scratch[3072];
173	}	215	struct fiemap *incmap = (struct fiemap *)scratch;
174		216
175	if (wrk->dbuf)	217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
176	{	218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
177	free (wrk->dbuf);	219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
178	wrk->dbuf = 0;	220	incmap->fm_flags = fiemap->fm_flags;
179	}	221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
180	}
181		222
182	static void worker_free (worker *wrk)	223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap))
183	{
184	wrk->next->prev = wrk->prev;
185	wrk->prev->next = wrk->next;
186
187	free (wrk);
188	}
189
190	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
191	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
192	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
193
194	/*
195	* a somewhat faster data structure might be nice, but
196	* with 8 priorities this actually needs <20 insns
197	* per shift, the most expensive operation.
198	*/
199	typedef struct {
200	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
201	int size;
202	} reqq;
203
204	static reqq req_queue;
205	static reqq res_queue;
206
207	int reqq_push (reqq *q, aio_req req)
208	{
209	int pri = req->pri;
210	req->next = 0;
211
212	if (q->qe[pri])
213	{
214	q->qe[pri]->next = req;
215	q->qe[pri] = req;
216	}
217	else
218	q->qe[pri] = q->qs[pri] = req;
219
220	return q->size++;
221	}
222
223	aio_req reqq_shift (reqq *q)
224	{
225	int pri;
226
227	if (!q->size)
228	return 0;	224	return;
229		225
230	--q->size;	226	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
231		227	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
232	for (pri = NUM_PRI; pri--; )	228	errno = ENOMEM;
233	{
234	aio_req req = q->qs[pri];
235
236	if (req)	229	if (!fiemap)
		230	return;
		231
		232	req->ptr1 = fiemap;
		233
		234	for (count = 0; count < incmap->fm_mapped_extents; ++count)
237	{	235	{
238	if (!(q->qs[pri] = req->next))	236	struct fiemap_extent *e = incmap->fm_extents + count;
239	q->qe[pri] = 0;
240		237
241	return req;	238	if (e->fe_logical + e->fe_length >= end_offset)
		239	goto done;
		240
		241	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		242
		243	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		244	goto done;
		245
242	}	246	}
243	}	247	}
244		248
245	abort ();	249	done:
246	}	250	req->result = 0;
247		251
248	static int poll_cb (int max);	252	#else
249	static void req_invoke (aio_req req);	253	errno = ENOSYS;
		254	#endif
		255	}
		256
		257	/*****************************************************************************/
		258
		259	enum {
		260	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		261	};
		262
		263	typedef eio_req *aio_req;
		264	typedef eio_req *aio_req_ornot;
		265	typedef eio_wd aio_wd;
		266
		267	static SV *on_next_submit;
		268	static int next_pri = EIO_PRI_DEFAULT;
		269	static int max_outstanding;
		270
		271	static s_epipe respipe;
		272
250	static void req_free (aio_req req);	273	static void req_destroy (aio_req req);
251	static void req_cancel (aio_req req);	274	static void req_cancel (aio_req req);
252		275
		276	static void
		277	want_poll (void)
		278	{
		279	/* write a dummy byte to the pipe so fh becomes ready */
		280	s_epipe_signal (&respipe);
		281	}
		282
		283	static void
		284	done_poll (void)
		285	{
		286	/* read any signals sent by the worker threads */
		287	s_epipe_drain (&respipe);
		288	}
		289
253	/* must be called at most once */	290	/* must be called at most once */
254	static SV *req_sv (aio_req req, const char *klass)	291	static SV *
		292	req_sv (aio_req req, HV *stash)
255	{	293	{
256	if (!req->self)	294	if (!req->self)
257	{	295	{
258	req->self = (SV *)newHV ();	296	req->self = (SV *)newHV ();
259	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	297	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
260	}	298	}
261		299
262	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	300	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
263	}	301	}
264		302
265	static aio_req SvAIO_REQ (SV *sv)	303	static SV *
		304	newSVaio_wd (aio_wd wd)
		305	{
		306	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		307	}
		308
		309	static aio_req
		310	SvAIO_REQ (SV *sv)
266	{	311	{
267	MAGIC *mg;	312	MAGIC *mg;
268		313
269	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	314	if (!SvROK (sv)
		315	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		316	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		317	&& SvSTASH (SvRV (sv)) != aio_req_stash
		318	&& !sv_derived_from (sv, "IO::AIO::REQ")))
270	croak ("object of class " AIO_REQ_KLASS " expected");	319	croak ("object of class IO::AIO::REQ expected");
271		320
272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
273		322
274	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
275	}	324	}
276		325
		326	static aio_wd
		327	SvAIO_WD (SV *sv)
		328	{
		329	if (!SvROK (sv)
		330	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		331	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		332	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		333
		334	return (aio_wd)(long)SvIVX (SvRV (sv));
		335	}
		336
		337	static void
277	static void aio_grp_feed (aio_req grp)	338	aio_grp_feed (aio_req grp)
278	{	339	{
279	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	340	if (grp->sv2 && SvOK (grp->sv2))
280	{	341	{
281	int old_len = grp->length;
282
283	if (grp->fh2 && SvOK (grp->fh2))
284	{
285	dSP;	342	dSP;
286		343
287	ENTER;	344	ENTER;
288	SAVETMPS;	345	SAVETMPS;
289	PUSHMARK (SP);	346	PUSHMARK (SP);
290	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	347	XPUSHs (req_sv (grp, aio_grp_stash));
291	PUTBACK;	348	PUTBACK;
292	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	349	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
293	SPAGAIN;	350	SPAGAIN;
294	FREETMPS;	351	FREETMPS;
295	LEAVE;	352	LEAVE;
296	}
297
298	/* stop if no progress has been made */
299	if (old_len == grp->length)
300	{
301	SvREFCNT_dec (grp->fh2);
302	grp->fh2 = 0;
303	break;
304	}
305	}	353	}
306	}	354	}
307		355
308	static void aio_grp_dec (aio_req grp)	356	static void
		357	req_submit (eio_req *req)
309	{	358	{
310	--grp->length;	359	eio_submit (req);
311		360
312	/* call feeder, if applicable */	361	if (expect_false (on_next_submit))
313	aio_grp_feed (grp);
314
315	/* finish, if done */
316	if (!grp->length && grp->fd)
317	{	362	{
318	req_invoke (grp);	363	dSP;
319	req_free (grp);	364	SV *cb = sv_2mortal (on_next_submit);
		365
		366	on_next_submit = 0;
		367
		368	PUSHMARK (SP);
		369	PUTBACK;
		370	call_sv (cb, G_DISCARD | G_EVAL);
320	}	371	}
321	}	372	}
322		373
323	static void poll_wait ()	374	static int
		375	req_invoke (eio_req *req)
324	{	376	{
325	fd_set rfd;	377	if (req->flags & FLAG_SV2_RO_OFF)
		378	SvREADONLY_off (req->sv2);
326		379
327	while (nreqs)	380	if (!EIO_CANCELLED (req) && req->callback)
328	{	381	{
329	int size;
330	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
331	LOCK (reslock);
332	#endif
333	size = res_queue.size;
334	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
335	UNLOCK (reslock);
336	#endif
337
338	if (size)
339	return;
340
341	FD_ZERO(&rfd);
342	FD_SET(respipe [0], &rfd);
343
344	select (respipe [0] + 1, &rfd, 0, 0, 0);
345	}
346	}
347
348	static void req_invoke (aio_req req)
349	{
350	dSP;	382	dSP;
351		383	static SV *sv_result_cache; /* caches the result integer SV */
352	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	384	SV *sv_result;
353	{
354	errno = req->errorno;
355		385
356	ENTER;	386	ENTER;
357	SAVETMPS;	387	SAVETMPS;
358	PUSHMARK (SP);	388	PUSHMARK (SP);
359	EXTEND (SP, 1);	389	EXTEND (SP, 1);
360		390
		391	/* do not recreate the result IV from scratch each time */
		392	if (expect_true (sv_result_cache))
		393	{
		394	sv_result = sv_result_cache; sv_result_cache = 0;
		395	SvIV_set (sv_result, req->result);
		396	SvIOK_only (sv_result);
		397	}
		398	else
		399	{
		400	sv_result = newSViv (req->result);
		401	SvREADONLY_on (sv_result);
		402	}
		403
361	switch (req->type)	404	switch (req->type)
362	{	405	{
		406	case EIO_WD_OPEN:
		407	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		408	break;
		409
363	case REQ_READDIR:	410	case EIO_READDIR:
364	{	411	{
365	SV *rv = &PL_sv_undef;	412	SV *rv = &PL_sv_undef;
366		413
367	if (req->result >= 0)	414	if (req->result >= 0)
368	{	415	{
369	int i;	416	int i;
370	char *buf = req->data2ptr;	417	char *names = (char *)req->ptr2;
		418	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
371	AV *av = newAV ();	419	AV *av = newAV ();
372		420
373	av_extend (av, req->result - 1);	421	av_extend (av, req->result - 1);
374		422
375	for (i = 0; i < req->result; ++i)	423	for (i = 0; i < req->result; ++i)
376	{	424	{
377	SV *sv = newSVpv (buf, 0);	425	if (req->int1 & EIO_READDIR_DENTS)
		426	{
		427	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
378		428
		429	if (req->int1 & EIO_READDIR_CUSTOM2)
		430	{
		431	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		432	AV *avent = newAV ();
		433
		434	av_extend (avent, 2);
		435
		436	if (!sv_type [ent->type])
		437	{
		438	sv_type [ent->type] = newSViv (ent->type);
		439	SvREADONLY_on (sv_type [ent->type]);
		440	}
		441
		442	av_store (avent, 0, namesv);
		443	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		444	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		445
		446	av_store (av, i, newRV_noinc ((SV *)avent));
		447	}
		448	else
379	av_store (av, i, sv);	449	av_store (av, i, namesv);
		450
		451	++ent;
		452	}
		453	else
		454	{
		455	SV *name = newSVpv (names, 0);
		456	av_store (av, i, name);
380	buf += SvCUR (sv) + 1;	457	names += SvCUR (name) + 1;
		458	}
381	}	459	}
382		460
383	rv = sv_2mortal (newRV_noinc ((SV *)av));	461	rv = sv_2mortal (newRV_noinc ((SV *)av));
384	}	462	}
385		463
386	PUSHs (rv);	464	PUSHs (rv);
		465
		466	if (req->int1 & EIO_READDIR_CUSTOM1)
		467	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
387	}	468	}
388	break;	469	break;
389		470
390	case REQ_OPEN:	471	case EIO_OPEN:
391	{	472	{
392	/* convert fd to fh */	473	/* convert fd to fh */
393	SV *fh;	474	SV *fh = &PL_sv_undef;
394		475
395	PUSHs (sv_2mortal (newSViv (req->result)));	476	if (req->result >= 0)
396	PUTBACK;	477	{
397	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	478	GV *gv = (GV *)sv_newmortal ();
398	SPAGAIN;	479	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		480	char sym [64];
		481	int symlen;
		482
		483	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		484	gv_init (gv, aio_stash, sym, symlen, 0);
399		485
400	fh = SvREFCNT_inc (POPs);	486	symlen = snprintf (
		487	sym,
		488	sizeof (sym),
		489	"%s&=%d",
		490	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		491	(int)req->result
		492	);
401		493
		494	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		495	fh = (SV *)gv;
		496	}
		497
402	PUSHMARK (SP);	498	PUSHs (fh);
403	XPUSHs (sv_2mortal (fh));
404	}	499	}
405	break;	500	break;
406		501
		502	case EIO_STATVFS:
		503	case EIO_FSTATVFS:
		504	{
		505	SV *rv = &PL_sv_undef;
		506
		507	#ifndef _WIN32
		508	if (req->result >= 0)
		509	{
		510	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		511	HV *hv = newHV ();
		512
		513	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		514
		515	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		516	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		517	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		518	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		519	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		520	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		521	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		522	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		523	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		524	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		525	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		526	}
		527	#endif
		528
		529	PUSHs (rv);
		530	}
		531
		532	break;
		533
407	case REQ_GROUP:	534	case EIO_GROUP:
408	req->fd = 2; /* mark group as finished */	535	req->int1 = 2; /* mark group as finished */
409		536
410	if (req->data)	537	if (req->sv1)
411	{	538	{
412	int i;	539	int i;
413	AV *av = (AV *)req->data;	540	AV *av = (AV *)req->sv1;
414		541
415	EXTEND (SP, AvFILL (av) + 1);	542	EXTEND (SP, AvFILL (av) + 1);
416	for (i = 0; i <= AvFILL (av); ++i)	543	for (i = 0; i <= AvFILL (av); ++i)
417	PUSHs (*av_fetch (av, i, 0));	544	PUSHs (*av_fetch (av, i, 0));
418	}	545	}
419	break;	546	break;
420		547
421	case REQ_NOP:	548	case EIO_NOP:
422	case REQ_BUSY:	549	case EIO_BUSY:
423	break;	550	break;
424		551
		552	case EIO_READLINK:
		553	case EIO_REALPATH:
		554	if (req->result > 0)
		555	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		556	break;
		557
		558	case EIO_STAT:
		559	case EIO_LSTAT:
		560	case EIO_FSTAT:
		561	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		562
		563	if (!(PL_laststatval = req->result))
		564	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		565	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		566
		567	PUSHs (sv_result);
		568	break;
		569
		570	case EIO_SEEK:
		571	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		572	break;
		573
		574	case EIO_READ:
		575	{
		576	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		577	*SvEND (req->sv2) = 0;
		578	SvPOK_only (req->sv2);
		579	SvSETMAGIC (req->sv2);
		580	PUSHs (sv_result);
		581	}
		582	break;
		583
		584	case EIO_CUSTOM:
		585	if (req->feed == fiemap)
		586	{
		587	#if HAVE_FIEMAP
		588	if (!req->result)
		589	{
		590	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		591
		592	if (fiemap->fm_extent_count)
		593	{
		594	AV *av = newAV ();
		595	int i;
		596
		597	while (fiemap->fm_mapped_extents)
		598	{
		599	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		600	AV *ext_av = newAV ();
		601
		602	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		603	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		604	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		605	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		606
		607	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		608	}
		609
		610	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		611	}
		612	else
		613	{
		614	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		615	PUSHs (sv_result);
		616	}
		617	}
		618	#endif
		619	}
		620	else
		621	PUSHs (sv_result);
		622	break;
		623
		624	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		625	if (req->result > 0)
		626	SvIV_set (sv_result, 0);
		627	/* FALLTHROUGH */
		628
425	default:	629	default:
426	PUSHs (sv_2mortal (newSViv (req->result)));	630	PUSHs (sv_result);
427	break;	631	break;
428	}	632	}
429		633
		634	errno = req->errorno;
430		635
431	PUTBACK;	636	PUTBACK;
432	call_sv (req->callback, G_VOID | G_EVAL);	637	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
433	SPAGAIN;	638	SPAGAIN;
		639
		640	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		641	SvREFCNT_dec (sv_result);
		642	else
		643	sv_result_cache = sv_result;
434		644
435	FREETMPS;	645	FREETMPS;
436	LEAVE;	646	LEAVE;
		647
		648	PUTBACK;
437	}	649	}
438		650
439	if (req->grp)	651	return !!SvTRUE (ERRSV);
440	{
441	aio_req grp = req->grp;
442
443	/* unlink request */
444	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
445	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
446
447	if (grp->grp_first == req)
448	grp->grp_first = req->grp_next;
449
450	aio_grp_dec (grp);
451	}
452
453	if (SvTRUE (ERRSV))
454	{
455	req_free (req);
456	croak (0);
457	}
458	}	652	}
459		653
460	static void req_free (aio_req req)	654	static void
		655	req_destroy (aio_req req)
461	{	656	{
462	if (req->self)	657	if (req->self)
463	{	658	{
464	sv_unmagic (req->self, PERL_MAGIC_ext);	659	sv_unmagic (req->self, PERL_MAGIC_ext);
465	SvREFCNT_dec (req->self);	660	SvREFCNT_dec (req->self);
466	}	661	}
467		662
468	SvREFCNT_dec (req->data);
469	SvREFCNT_dec (req->fh);	663	SvREFCNT_dec (req->sv1);
470	SvREFCNT_dec (req->fh2);	664	SvREFCNT_dec (req->sv2);
		665	SvREFCNT_dec (req->sv3);
		666	SvREFCNT_dec (req->sv4);
471	SvREFCNT_dec (req->callback);	667	SvREFCNT_dec (req->callback);
472	Safefree (req->statdata);
473		668
474	if (req->type == REQ_READDIR)
475	free (req->data2ptr);
476
477	Safefree (req);	669	free (req);
478	}	670	}
479		671
		672	static void
480	static void req_cancel_subs (aio_req grp)	673	req_cancel_subs (aio_req grp)
481	{	674	{
482	aio_req sub;
483
484	if (grp->type != REQ_GROUP)	675	if (grp->type != EIO_GROUP)
485	return;	676	return;
486		677
487	SvREFCNT_dec (grp->fh2);	678	SvREFCNT_dec (grp->sv2);
488	grp->fh2 = 0;	679	grp->sv2 = 0;
489		680
490	for (sub = grp->grp_first; sub; sub = sub->grp_next)	681	eio_grp_cancel (grp);
491	req_cancel (sub);
492	}	682	}
493		683
494	static void req_cancel (aio_req req)	684	static void ecb_cold
		685	create_respipe (void)
495	{	686	{
496	req->flags |= FLAG_CANCELLED;	687	if (s_epipe_renew (&respipe))
497		688	croak ("IO::AIO: unable to initialize result pipe");
498	req_cancel_subs (req);
499	}	689	}
500		690
501	static int poll_cb (int max)	691	static void
		692	poll_wait (void)
502	{	693	{
503	dSP;	694	while (eio_nreqs ())
504	int count = 0;	695	{
505	int do_croak = 0;	696	int size;
		697
		698	X_LOCK (reslock);
		699	size = res_queue.size;
		700	X_UNLOCK (reslock);
		701
		702	if (size)
		703	return;
		704
		705	etp_maybe_start_thread ();
		706
		707	s_epipe_wait (&respipe);
		708	}
		709	}
		710
		711	static int
		712	poll_cb (void)
		713	{
		714	for (;;)
		715	{
		716	int res = eio_poll ();
		717
		718	if (res > 0)
		719	croak (0);
		720
		721	if (!max_outstanding || max_outstanding > eio_nreqs ())
		722	return res;
		723
		724	poll_wait ();
		725	}
		726	}
		727
		728	static void ecb_cold
		729	reinit (void)
		730	{
		731	create_respipe ();
		732
		733	if (eio_init (want_poll, done_poll) < 0)
		734	croak ("IO::AIO: unable to initialise eio library");
		735	}
		736
		737	/*****************************************************************************/
		738
		739	#if !_POSIX_MAPPED_FILES
		740	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		741	# define munmap(addr,length) EIO_ENOSYS ()
		742	#endif
		743
		744	#if !_POSIX_MEMORY_PROTECTION
		745	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		746	# define PROT_NONE 0
		747	# define PROT_WRITE 0
		748	# define MAP_PRIVATE 0
		749	# define MAP_SHARED 0
		750	# define MAP_FIXED 0
		751	#endif
		752
		753	#define MMAP_MAGIC PERL_MAGIC_ext
		754
		755	static int ecb_cold
		756	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		757	{
		758	int old_errno = errno;
		759	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		760	errno = old_errno;
		761
		762	mg->mg_obj = 0; /* just in case */
		763
		764	SvREADONLY_off (sv);
		765
		766	if (SvPVX (sv) != mg->mg_ptr)
		767	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		768
		769	SvCUR_set (sv, 0);
		770	SvPVX (sv) = 0;
		771	SvOK_off (sv);
		772
		773	return 0;
		774	}
		775
		776	static MGVTBL mmap_vtbl = {
		777	0, 0, 0, 0, mmap_free
		778	};
		779
		780	/*****************************************************************************/
		781
		782	static SV *
		783	get_cb (SV *cb_sv)
		784	{
		785	SvGETMAGIC (cb_sv);
		786	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		787	}
		788
		789	static aio_req ecb_noinline
		790	dreq (SV *callback)
		791	{
		792	SV *cb_cv;
506	aio_req req;	793	aio_req req;
		794	int req_pri = next_pri;
		795	next_pri = EIO_PRI_DEFAULT;
507		796
508	while (max <= 0 || count < max)	797	cb_cv = get_cb (callback);
		798
		799	req = calloc (sizeof (*req), 1);
		800	if (!req)
		801	croak ("out of memory during eio_req allocation");
		802
		803	req->callback = SvREFCNT_inc (cb_cv);
		804	req->pri = req_pri;
		805
		806	return req;
		807	}
		808
		809	#define dREQ \
		810	aio_req req = dreq (callback); \
		811
		812	#define REQ_SEND \
		813	PUTBACK; \
		814	req_submit (req); \
		815	SPAGAIN; \
		816	\
		817	if (GIMME_V != G_VOID) \
		818	XPUSHs (req_sv (req, aio_req_stash));
		819
		820	ecb_inline void
		821	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		822	{
		823	if (expect_false (SvROK (path)))
509	{	824	{
510	LOCK (reslock);	825	SV *rv = SvRV (path);
511	req = reqq_shift (&res_queue);	826	SV *wdob;
512		827
513	if (req)	828	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
514	{	829	{
515	if (!res_queue.size)	830	path = AvARRAY (rv)[1];
		831	wdob = AvARRAY (rv)[0];
		832
		833	if (SvOK (wdob))
516	{	834	{
517	/* read any signals sent by the worker threads */	835	*wd = SvAIO_WD (wdob);
518	char buf [32];	836	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
519	while (read (respipe [0], buf, 32) == 32)
520	;
521	}	837	}
		838	else
		839	*wd = EIO_INVALID_WD;
522	}	840	}
523		841	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
524	UNLOCK (reslock);
525
526	if (!req)
527	break;
528
529	--nreqs;
530
531	if (req->type == REQ_QUIT)
532	started--;
533	else if (req->type == REQ_GROUP && req->length)
534	{	842	{
535	req->fd = 1; /* mark request as delayed */	843	*wd = (aio_wd)(long)SvIVX (rv);
536	continue;	844	*wdsv = SvREFCNT_inc_NN (rv);
		845	*ptr = ".";
		846	return; /* path set to "." */
537	}	847	}
538	else	848	else
539	{	849	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
540	if (req->type == REQ_READ)
541	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
542
543	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
544	SvREADONLY_off (req->data);
545
546	if (req->statdata)
547	{
548	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
549	PL_laststatval = req->result;
550	PL_statcache = *(req->statdata);
551	}
552
553	req_invoke (req);
554
555	count++;
556	}
557
558	req_free (req);
559	}	850	}
560		851
561	return count;	852	*pathsv = newSVsv (path);
		853	*ptr = SvPVbyte_nolen (*pathsv);
562	}	854	}
563		855
564	static void *aio_proc(void *arg);	856	static void ecb_noinline
565		857	req_set_path1 (aio_req req, SV *path)
566	static void start_thread (void)
567	{	858	{
568	sigset_t fullsigset, oldsigset;	859	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
569	pthread_attr_t attr;	860	}
570		861
571	worker *wrk = calloc (1, sizeof (worker));	862	static void ecb_noinline
		863	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		864	{
		865	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
572		866
573	if (!wrk)	867	switch (SvTYPE (rv))
574	croak ("unable to allocate worker thread data");
575
576	pthread_attr_init (&attr);
577	pthread_attr_setstacksize (&attr, STACKSIZE);
578	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
579
580	sigfillset (&fullsigset);
581
582	LOCK (wrklock);
583	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
584
585	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
586	{	868	{
587	wrk->prev = &wrk_first;	869	case SVt_PVIO:
588	wrk->next = wrk_first.next;	870	case SVt_PVLV:
589	wrk_first.next->prev = wrk;	871	case SVt_PVGV:
590	wrk_first.next = wrk;	872	req->type = type_fh;
591	started++;	873	req->sv1 = newSVsv (fh_or_path);
		874	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		875	break;
		876
		877	default:
		878	req->type = type_path;
		879	req_set_path1 (req, fh_or_path);
		880	break;
592	}	881	}
593	else
594	free (wrk);
595
596	sigprocmask (SIG_SETMASK, &oldsigset, 0);
597	UNLOCK (wrklock);
598	}	882	}
599		883
600	static void req_send (aio_req req)	884	XS(boot_IO__AIO) ecb_cold;
601	{
602	while (started < wanted && nreqs >= started)
603	start_thread ();
604		885
605	++nreqs;	886	MODULE = IO::AIO PACKAGE = IO::AIO
606		887
607	LOCK (reqlock);	888	PROTOTYPES: ENABLE
608	reqq_push (&req_queue, req);
609	pthread_cond_signal (&reqwait);
610	UNLOCK (reqlock);
611	}
612		889
613	static void end_thread (void)	890	BOOT:
614	{	891	{
615	aio_req req;	892	static const struct {
		893	const char *name;
		894	IV iv;
		895	} *civ, const_iv[] = {
		896	# define const_niv(name, value) { # name, (IV) value },
		897	# define const_iv(name) { # name, (IV) name },
		898	# define const_eio(name) { # name, (IV) EIO_ ## name },
616		899
617	Newz (0, req, 1, aio_cb);	900	/* you have to re-run ./gendef0 after adding/Removing any constants here */
618		901
619	req->type = REQ_QUIT;	902	const_iv (ENOSYS)
620	req->pri = PRI_MAX + PRI_BIAS;	903	const_iv (EXDEV)
		904	const_iv (EBADR)
621		905
622	req_send (req);	906	const_iv (O_RDONLY)
623	}	907	const_iv (O_WRONLY)
		908	const_iv (O_RDWR)
		909	const_iv (O_CREAT)
		910	const_iv (O_TRUNC)
		911	const_iv (O_EXCL)
		912	const_iv (O_APPEND)
624		913
625	static void min_parallel (int nthreads)	914	const_iv (O_ASYNC)
626	{	915	const_iv (O_DIRECT)
627	if (wanted < nthreads)	916	const_iv (O_NOATIME)
628	wanted = nthreads;
629	}
630		917
631	static void max_parallel (int nthreads)	918	const_iv (O_CLOEXEC)
632	{	919	const_iv (O_NOCTTY)
633	int cur = started;	920	const_iv (O_NOFOLLOW)
		921	const_iv (O_NONBLOCK)
		922	const_iv (O_EXEC)
		923	const_iv (O_SEARCH)
		924	const_iv (O_DIRECTORY)
		925	const_iv (O_DSYNC)
		926	const_iv (O_RSYNC)
		927	const_iv (O_SYNC)
		928	const_iv (O_TTY_INIT)
634		929
635	if (wanted > nthreads)	930	const_iv (S_IFIFO)
636	wanted = nthreads;	931	const_iv (S_IFCHR)
		932	const_iv (S_IFBLK)
		933	const_iv (S_IFLNK)
		934	const_iv (S_IFREG)
		935	const_iv (S_IFDIR)
		936	const_iv (S_IFWHT)
		937	const_iv (S_IFSOCK)
		938	const_iv (S_IFMT)
637		939
638	while (cur > wanted)	940	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
639	{	941	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
640	end_thread ();	942	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
641	cur--;	943	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
642	}	944	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		945	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
643		946
644	while (started > wanted)	947	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
645	{	948	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
646	poll_wait ();	949	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
647	poll_cb (0);	950	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
648	}	951	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
649	}
650		952
651	static void create_pipe ()	953	const_iv (ST_RDONLY)
652	{	954	const_iv (ST_NOSUID)
653	if (pipe (respipe))	955	const_iv (ST_NODEV)
654	croak ("unable to initialize result pipe");	956	const_iv (ST_NOEXEC)
		957	const_iv (ST_SYNCHRONOUS)
		958	const_iv (ST_MANDLOCK)
		959	const_iv (ST_WRITE)
		960	const_iv (ST_APPEND)
		961	const_iv (ST_IMMUTABLE)
		962	const_iv (ST_NOATIME)
		963	const_iv (ST_NODIRATIME)
		964	const_iv (ST_RELATIME)
655		965
656	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	966	const_iv (PROT_NONE)
657	croak ("cannot set result pipe to nonblocking mode");	967	const_iv (PROT_EXEC)
		968	const_iv (PROT_READ)
		969	const_iv (PROT_WRITE)
658		970
659	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	971	/*const_iv (MAP_FIXED)*/
660	croak ("cannot set result pipe to nonblocking mode");	972	const_iv (MAP_PRIVATE)
661	}	973	const_iv (MAP_SHARED)
		974	const_iv (MAP_ANONYMOUS)
662		975
663	/*****************************************************************************/	976	/* linuxish */
664	/* work around various missing functions */	977	const_iv (MAP_HUGETLB)
		978	const_iv (MAP_LOCKED)
		979	const_iv (MAP_NORESERVE)
		980	const_iv (MAP_POPULATE)
		981	const_iv (MAP_NONBLOCK)
665		982
666	#if !HAVE_PREADWRITE	983	const_iv (FIEMAP_FLAG_SYNC)
667	# define pread aio_pread	984	const_iv (FIEMAP_FLAG_XATTR)
668	# define pwrite aio_pwrite	985	const_iv (FIEMAP_FLAGS_COMPAT)
		986	const_iv (FIEMAP_EXTENT_LAST)
		987	const_iv (FIEMAP_EXTENT_UNKNOWN)
		988	const_iv (FIEMAP_EXTENT_DELALLOC)
		989	const_iv (FIEMAP_EXTENT_ENCODED)
		990	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		991	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		992	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		993	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		994	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		995	const_iv (FIEMAP_EXTENT_MERGED)
		996	const_iv (FIEMAP_EXTENT_SHARED)
669		997
670	/*	998	const_iv (SPLICE_F_MOVE)
671	* make our pread/pwrite safe against themselves, but not against	999	const_iv (SPLICE_F_NONBLOCK)
672	* normal read/write by using a mutex. slows down execution a lot,	1000	const_iv (SPLICE_F_MORE)
673	* but that's your problem, not mine.	1001	const_iv (SPLICE_F_GIFT)
674	*/
675	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
676		1002
677	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1003	const_iv (SEEK_DATA)
678	{	1004	const_iv (SEEK_HOLE)
679	ssize_t res;
680	off_t ooffset;
681		1005
682	LOCK (preadwritelock);	1006	/* libeio constants */
683	ooffset = lseek (fd, 0, SEEK_CUR);	1007	const_eio (SEEK_SET)
684	lseek (fd, offset, SEEK_SET);	1008	const_eio (SEEK_CUR)
685	res = read (fd, buf, count);	1009	const_eio (SEEK_END)
686	lseek (fd, ooffset, SEEK_SET);
687	UNLOCK (preadwritelock);
688		1010
689	return res;	1011	const_eio (MCL_FUTURE)
690	}	1012	const_eio (MCL_CURRENT)
691		1013
692	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1014	const_eio (MS_ASYNC)
693	{	1015	const_eio (MS_INVALIDATE)
694	ssize_t res;	1016	const_eio (MS_SYNC)
695	off_t ooffset;
696		1017
697	LOCK (preadwritelock);	1018	const_eio (MT_MODIFY)
698	ooffset = lseek (fd, 0, SEEK_CUR);
699	lseek (fd, offset, SEEK_SET);
700	res = write (fd, buf, count);
701	lseek (fd, offset, SEEK_SET);
702	UNLOCK (preadwritelock);
703		1019
704	return res;	1020	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
705	}	1021	const_eio (SYNC_FILE_RANGE_WRITE)
706	#endif	1022	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
707		1023
708	#if !HAVE_FDATASYNC	1024	const_eio (FALLOC_FL_KEEP_SIZE)
709	# define fdatasync fsync	1025	const_eio (FALLOC_FL_PUNCH_HOLE)
710	#endif
711		1026
712	#if !HAVE_READAHEAD	1027	const_eio (READDIR_DENTS)
713	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	1028	const_eio (READDIR_DIRS_FIRST)
		1029	const_eio (READDIR_STAT_ORDER)
		1030	const_eio (READDIR_FOUND_UNKNOWN)
714		1031
715	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1032	const_eio (DT_UNKNOWN)
716	{	1033	const_eio (DT_FIFO)
717	dBUF;	1034	const_eio (DT_CHR)
718		1035	const_eio (DT_DIR)
719	while (count > 0)	1036	const_eio (DT_BLK)
720	{	1037	const_eio (DT_REG)
721	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	1038	const_eio (DT_LNK)
722		1039	const_eio (DT_SOCK)
723	pread (fd, aio_buf, len, offset);	1040	const_eio (DT_WHT)
724	offset += len;
725	count -= len;
726	}
727
728	errno = 0;
729	}
730
731	#endif
732
733	#if !HAVE_READDIR_R
734	# define readdir_r aio_readdir_r
735
736	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
737
738	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
739	{
740	struct dirent *e;
741	int errorno;
742
743	LOCK (readdirlock);
744
745	e = readdir (dirp);
746	errorno = errno;
747
748	if (e)
749	{
750	*res = ent;
751	strcpy (ent->d_name, e->d_name);
752	}
753	else
754	*res = 0;
755
756	UNLOCK (readdirlock);
757
758	errno = errorno;
759	return e ? 0 : -1;
760	}
761	#endif
762
763	/* sendfile always needs emulation */
764	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
765	{
766	ssize_t res;
767
768	if (!count)
769	return 0;
770
771	#if HAVE_SENDFILE
772	# if __linux
773	res = sendfile (ofd, ifd, &offset, count);
774
775	# elif __freebsd
776	/*
777	* Of course, the freebsd sendfile is a dire hack with no thoughts
778	* wasted on making it similar to other I/O functions.
779	*/
780	{
781	off_t sbytes;
782	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
783
784	if (res < 0 && sbytes)
785	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
786	res = sbytes;
787	}	1041	};
788		1042
789	# elif __hpux	1043	aio_stash = gv_stashpv ("IO::AIO" , 1);
790	res = sendfile (ofd, ifd, offset, count, 0, 0);	1044	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1045	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1046	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
791		1047
792	# elif __solaris	1048	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
793	{	1049	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
794	struct sendfilevec vec;
795	size_t sbytes;
796		1050
797	vec.sfv_fd = ifd;	1051	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
798	vec.sfv_flag = 0;
799	vec.sfv_off = offset;
800	vec.sfv_len = count;
801		1052
802	res = sendfilev (ofd, &vec, 1, &sbytes);	1053	reinit ();
		1054	}
803		1055
804	if (res < 0 && sbytes)	1056	void
		1057	reinit ()
		1058	PROTOTYPE:
		1059
		1060	void
		1061	max_poll_reqs (unsigned int nreqs)
		1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_max_poll_reqs (nreqs);
		1065
		1066	void
		1067	max_poll_time (double nseconds)
		1068	PROTOTYPE: $
		1069	CODE:
		1070	eio_set_max_poll_time (nseconds);
		1071
		1072	void
		1073	min_parallel (unsigned int nthreads)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_min_parallel (nthreads);
		1077
		1078	void
		1079	max_parallel (unsigned int nthreads)
		1080	PROTOTYPE: $
		1081	CODE:
		1082	eio_set_max_parallel (nthreads);
		1083
		1084	void
		1085	max_idle (unsigned int nthreads)
		1086	PROTOTYPE: $
		1087	CODE:
		1088	eio_set_max_idle (nthreads);
		1089
		1090	void
		1091	idle_timeout (unsigned int seconds)
		1092	PROTOTYPE: $
		1093	CODE:
		1094	eio_set_idle_timeout (seconds);
		1095
		1096	void
		1097	max_outstanding (unsigned int maxreqs)
		1098	PROTOTYPE: $
		1099	CODE:
		1100	max_outstanding = maxreqs;
		1101
		1102	void
		1103	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	dREQ;
		1107
		1108	req->type = EIO_WD_OPEN;
		1109	req_set_path1 (req, pathname);
		1110
		1111	REQ_SEND;
		1112	}
		1113
		1114	void
		1115	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->type = EIO_OPEN;
		1121	req_set_path1 (req, pathname);
		1122	req->int1 = flags;
		1123	req->int2 = mode;
		1124
		1125	REQ_SEND;
		1126	}
		1127
		1128	void
		1129	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1130	ALIAS:
		1131	aio_fsync = EIO_FSYNC
		1132	aio_fdatasync = EIO_FDATASYNC
		1133	aio_syncfs = EIO_SYNCFS
		1134	PPCODE:
		1135	{
		1136	int fd = s_fileno_croak (fh, 0);
		1137	dREQ;
		1138
		1139	req->type = ix;
		1140	req->sv1 = newSVsv (fh);
		1141	req->int1 = fd;
		1142
		1143	REQ_SEND;
		1144	}
		1145
		1146	void
		1147	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1148	PPCODE:
		1149	{
		1150	int fd = s_fileno_croak (fh, 0);
		1151	dREQ;
		1152
		1153	req->type = EIO_SYNC_FILE_RANGE;
		1154	req->sv1 = newSVsv (fh);
		1155	req->int1 = fd;
		1156	req->offs = offset;
805	res = sbytes;	1157	req->size = nbytes;
806	}	1158	req->int2 = flags;
807		1159
808	# endif	1160	REQ_SEND;
		1161	}
		1162
		1163	void
		1164	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1165	PPCODE:
		1166	{
		1167	int fd = s_fileno_croak (fh, 0);
		1168	dREQ;
		1169
		1170	req->type = EIO_FALLOCATE;
		1171	req->sv1 = newSVsv (fh);
		1172	req->int1 = fd;
		1173	req->int2 = mode;
		1174	req->offs = offset;
		1175	req->size = len;
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1185	int fd = s_fileno_croak (fh, 0);
		1186	dREQ;
		1187
		1188	if (expect_false (close_fd < 0))
		1189	{
		1190	int pipefd [2];
		1191
		1192	if (
		1193	#ifdef _WIN32
		1194	_pipe (pipefd, 1, _O_BINARY) < 0
809	#else	1195	#else
810	res = -1;	1196	pipe (pipefd) < 0
811	errno = ENOSYS;	1197	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
812	#endif	1198	#endif
813		1199	|| close (pipefd [1]) < 0
814	if (res < 0
815	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
816	#if __solaris
817	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
818	#endif
819	)
820	)
821	{
822	/* emulate sendfile. this is a major pain in the ass */
823	dBUF;
824
825	res = 0;
826
827	while (count)
828	{
829	ssize_t cnt;
830
831	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
832
833	if (cnt <= 0)
834	{	1200	)
835	if (cnt && !res) res = -1;	1201	abort (); /*D*/
836	break;
837	}
838		1202
839	cnt = write (ofd, aio_buf, cnt);	1203	close_fd = pipefd [0];
840
841	if (cnt <= 0)
842	{
843	if (cnt && !res) res = -1;
844	break;
845	}
846
847	offset += cnt;
848	res += cnt;
849	count -= cnt;
850	}
851	}
852
853	return res;
854	}
855
856	/* read a full directory */
857	static void scandir_ (aio_req req, worker *self)
858	{
859	DIR *dirp;
860	union
861	{
862	struct dirent d;
863	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
864	} *u;
865	struct dirent *entp;
866	char *name, *names;
867	int memlen = 4096;
868	int memofs = 0;
869	int res = 0;
870	int errorno;
871
872	LOCK (wrklock);
873	self->dirp = dirp = opendir (req->dataptr);
874	self->dbuf = u = malloc (sizeof (*u));
875	req->data2ptr = names = malloc (memlen);
876	UNLOCK (wrklock);
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	}	1204	}
909	}
910		1205
911	if (errno)	1206	req->type = EIO_DUP2;
912	res = -1;	1207	req->int1 = close_fd;
913		1208	req->sv2 = newSVsv (fh);
914	req->result = res;	1209	req->int2 = fd;
915	}
916		1210
917	/*****************************************************************************/	1211	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	}	1212	}
1010		1213
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	1214	void
1107	min_parallel (nthreads)	1215	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1108	int nthreads	1216	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: $$$;$
1123	PPCODE:
1124	{	1217	{
		1218	int fd = s_fileno_croak (fh, 0);
1125	dREQ;	1219	dREQ;
1126		1220
1127	req->type = REQ_OPEN;	1221	req->type = EIO_SEEK;
1128	req->data = newSVsv (pathname);	1222	req->sv1 = newSVsv (fh);
1129	req->dataptr = SvPVbyte_nolen (req->data);	1223	req->int1 = fd;
1130	req->fd = flags;	1224	req->offs = SvVAL64 (offset);
1131	req->mode = mode;	1225	req->int2 = whence;
1132		1226
1133	REQ_SEND;	1227	REQ_SEND;
1134	}	1228	}
1135		1229
1136	void	1230	void
1137	aio_close (fh,callback=&PL_sv_undef)	1231	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$
1141	ALIAS:	1232	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC
1145	PPCODE:
1146	{
1147	dREQ;
1148
1149	req->type = ix;
1150	req->fh = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152
1153	REQ_SEND (req);
1154	}
1155
1156	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:
1165	aio_read = REQ_READ	1233	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	1234	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$
1168	PPCODE:	1235	PPCODE:
1169	{	1236	{
1170	aio_req req;
1171	STRLEN svlen;	1237	STRLEN svlen;
		1238	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1172	char *svptr = SvPVbyte (data, svlen);	1239	char *svptr = SvPVbyte (data, svlen);
1173		1240	UV len = SvUV (length);
1174	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);
1176		1241
1177	if (dataoffset < 0)	1242	if (dataoffset < 0)
1178	dataoffset += svlen;	1243	dataoffset += svlen;
1179		1244
1180	if (dataoffset < 0 || dataoffset > svlen)	1245	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	1246	croak ("dataoffset outside of data scalar");
1182		1247
1183	if (ix == REQ_WRITE)	1248	if (ix == EIO_WRITE)
1184	{	1249	{
1185	/* write: check length and adjust. */	1250	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	1251	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	1252	len = svlen - dataoffset;
1188	}	1253	}
1189	else	1254	else
1190	{	1255	{
1191	/* read: grow scalar as necessary */	1256	/* read: check type and grow scalar as necessary */
		1257	SvUPGRADE (data, SVt_PV);
		1258	if (SvLEN (data) >= SvCUR (data))
1192	svptr = SvGROW (data, length + dataoffset);	1259	svptr = SvGROW (data, len + dataoffset + 1);
		1260	else if (SvCUR (data) < len + dataoffset)
		1261	croak ("length + dataoffset outside of scalar, and cannot grow");
1193	}	1262	}
1194
1195	if (length < 0)
1196	croak ("length must not be negative");
1197		1263
1198	{	1264	{
1199	dREQ;	1265	dREQ;
1200		1266
1201	req->type = ix;	1267	req->type = ix;
1202	req->fh = newSVsv (fh);	1268	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1269	req->int1 = fd;
1204	: IoOFP (sv_2io (fh)));	1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	1271	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	1272	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	1273	req->ptr2 = (char *)svptr + dataoffset;
		1274	req->stroffset = dataoffset;
1209		1275
1210	if (!SvREADONLY (data))	1276	if (!SvREADONLY (data))
1211	{	1277	{
1212	SvREADONLY_on (data);	1278	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	1279	req->flags |= FLAG_SV2_RO_OFF;
1214	}	1280	}
1215		1281
1216	REQ_SEND;	1282	REQ_SEND;
1217	}	1283	}
1218	}	1284	}
1219		1285
1220	void	1286	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1287	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1222	SV * out_fh	1288	ALIAS:
1223	SV * in_fh	1289	aio_readlink = EIO_READLINK
1224	UV in_offset	1290	aio_realpath = EIO_REALPATH
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$
1228	PPCODE:	1291	PPCODE:
1229	{	1292	{
		1293	dREQ;
		1294
		1295	req->type = ix;
		1296	req_set_path1 (req, pathname);
		1297
		1298	REQ_SEND;
		1299	}
		1300
		1301	void
		1302	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1303	PPCODE:
		1304	{
		1305	int ifd = s_fileno_croak (in_fh , 0);
		1306	int ofd = s_fileno_croak (out_fh, 1);
1230	dREQ;	1307	dREQ;
1231		1308
1232	req->type = REQ_SENDFILE;	1309	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	1310	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1311	req->int1 = ofd;
1235	req->fh2 = newSVsv (in_fh);	1312	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1313	req->int2 = ifd;
1237	req->offset = in_offset;	1314	req->offs = in_offset;
1238	req->length = length;	1315	req->size = length;
1239		1316
1240	REQ_SEND;	1317	REQ_SEND;
1241	}	1318	}
1242		1319
1243	void	1320	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1321	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$
1250	PPCODE:	1322	PPCODE:
1251	{	1323	{
		1324	int fd = s_fileno_croak (fh, 0);
1252	dREQ;	1325	dREQ;
1253		1326
1254	req->type = REQ_READAHEAD;	1327	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	1328	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1329	req->int1 = fd;
1257	req->offset = offset;	1330	req->offs = offset;
1258	req->length = length;	1331	req->size = length;
1259		1332
1260	REQ_SEND;	1333	REQ_SEND;
1261	}	1334	}
1262		1335
1263	void	1336	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	1337	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	1338	ALIAS:
1268	aio_stat = REQ_STAT	1339	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	1340	aio_lstat = EIO_LSTAT
		1341	aio_statvfs = EIO_STATVFS
1270	PPCODE:	1342	PPCODE:
1271	{	1343	{
1272	dREQ;	1344	dREQ;
1273		1345
1274	New (0, req->statdata, 1, Stat_t);	1346	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		1347
1294	REQ_SEND;	1348	REQ_SEND;
1295	}	1349	}
1296		1350
		1351	UV
		1352	major (UV dev)
		1353	ALIAS:
		1354	minor = 1
		1355	CODE:
		1356	RETVAL = ix ? major (dev) : minor (dev);
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	UV
		1361	makedev (UV maj, UV min)
		1362	CODE:
		1363	RETVAL = makedev (maj, min);
		1364	OUTPUT:
		1365	RETVAL
		1366
1297	void	1367	void
		1368	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1369	PPCODE:
		1370	{
		1371	dREQ;
		1372
		1373	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1374	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1375	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1387	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1388
		1389	REQ_SEND;
		1390	}
		1391
		1392	void
		1393	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1394	PPCODE:
		1395	{
		1396	dREQ;
		1397
		1398	req->int2 = mode;
		1399	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	void
		1405	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1406	PPCODE:
		1407	{
		1408	dREQ;
		1409
		1410	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1411	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1412	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1413
		1414	REQ_SEND;
		1415	}
		1416
		1417	void
		1418	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1419	PPCODE:
		1420	{
		1421	dREQ;
		1422
		1423	req->type = EIO_READDIR;
		1424	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1425
		1426	if (flags & EIO_READDIR_DENTS)
		1427	req->int1 |= EIO_READDIR_CUSTOM2;
		1428
		1429	req_set_path1 (req, pathname);
		1430
		1431	REQ_SEND;
		1432	}
		1433
		1434	void
		1435	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = EIO_MKDIR;
		1441	req->int2 = mode;
		1442	req_set_path1 (req, pathname);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	1448	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	1449	ALIAS:
1302	aio_unlink = REQ_UNLINK	1450	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	1451	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	1452	aio_readdir = EIO_READDIR
1305	PPCODE:	1453	PPCODE:
1306	{	1454	{
1307	dREQ;	1455	dREQ;
1308		1456
1309	req->type = ix;	1457	req->type = ix;
1310	req->data = newSVsv (pathname);	1458	req_set_path1 (req, pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	1459
1312
1313	REQ_SEND;	1460	REQ_SEND;
1314	}	1461	}
1315		1462
1316	void	1463	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1464	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:	1465	ALIAS:
1322	aio_link = REQ_LINK	1466	aio_link = EIO_LINK
1323	aio_symlink = REQ_SYMLINK	1467	aio_symlink = EIO_SYMLINK
1324	aio_rename = REQ_RENAME	1468	aio_rename = EIO_RENAME
1325	PPCODE:	1469	PPCODE:
1326	{	1470	{
		1471	eio_wd wd2 = 0;
1327	dREQ;	1472	dREQ;
1328		1473
1329	req->type = ix;	1474	req->type = ix;
1330	req->fh = newSVsv (oldpath);	1475	req_set_path1 (req, oldpath);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	1476	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1332	req->data = newSVsv (newpath);	1477	req->int3 = (long)wd2;
1333	req->dataptr = SvPVbyte_nolen (req->data);
1334		1478
1335	REQ_SEND;	1479	REQ_SEND;
1336	}	1480	}
1337		1481
1338	void	1482	void
1339	aio_busy (delay,callback=&PL_sv_undef)	1483	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	1484	PPCODE:
1343	{	1485	{
1344	dREQ;	1486	dREQ;
1345		1487
1346	req->type = REQ_BUSY;	1488	req->type = EIO_MKNOD;
1347	req->fd = delay < 0. ? 0 : delay;	1489	req->int2 = (mode_t)mode;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1490	req->offs = dev;
1349		1491	req_set_path1 (req, pathname);
		1492
1350	REQ_SEND;	1493	REQ_SEND;
1351	}	1494	}
1352		1495
1353	void	1496	void
1354	aio_group (callback=&PL_sv_undef)	1497	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1355	SV * callback	1498	ALIAS:
1356	PROTOTYPE: ;$	1499	aio_mtouch = EIO_MTOUCH
		1500	aio_msync = EIO_MSYNC
1357	PPCODE:	1501	PPCODE:
1358	{	1502	{
		1503	STRLEN svlen;
		1504	char *svptr = SvPVbyte (data, svlen);
		1505	UV len = SvUV (length);
		1506
		1507	if (offset < 0)
		1508	offset += svlen;
		1509
		1510	if (offset < 0 || offset > svlen)
		1511	croak ("offset outside of scalar");
		1512
		1513	if (!SvOK (length) || len + offset > svlen)
		1514	len = svlen - offset;
		1515
		1516	{
		1517	dREQ;
		1518
		1519	req->type = ix;
		1520	req->sv2 = SvREFCNT_inc (data);
		1521	req->ptr2 = (char *)svptr + offset;
		1522	req->size = len;
		1523	req->int1 = flags;
		1524
		1525	REQ_SEND;
		1526	}
		1527	}
		1528
		1529	void
		1530	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1531	PPCODE:
		1532	{
		1533	STRLEN svlen;
		1534	char *svptr = SvPVbyte (data, svlen);
		1535	UV len = SvUV (length);
		1536
		1537	if (offset < 0)
		1538	offset += svlen;
		1539
		1540	if (offset < 0 || offset > svlen)
		1541	croak ("offset outside of scalar");
		1542
		1543	if (!SvOK (length) || len + offset > svlen)
		1544	len = svlen - offset;
		1545
		1546	{
		1547	dREQ;
		1548
		1549	req->type = EIO_MLOCK;
		1550	req->sv2 = SvREFCNT_inc (data);
		1551	req->ptr2 = (char *)svptr + offset;
		1552	req->size = len;
		1553
		1554	REQ_SEND;
		1555	}
		1556	}
		1557
		1558	void
		1559	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1560	PPCODE:
		1561	{
		1562	dREQ;
		1563
		1564	req->type = EIO_MLOCKALL;
		1565	req->int1 = flags;
		1566
		1567	REQ_SEND;
		1568	}
		1569
		1570	void
		1571	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1572	PPCODE:
		1573	{
		1574	int fd = s_fileno_croak (fh, 0);
1359	dREQ;	1575	dREQ;
1360		1576
1361	req->type = REQ_GROUP;	1577	req->type = EIO_CUSTOM;
1362	req_send (req);	1578	req->sv1 = newSVsv (fh);
		1579	req->int1 = fd;
1363		1580
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1581	req->feed = fiemap;
1365	}	1582	#if HAVE_FIEMAP
		1583	/* keep our fingers crossed that the next two types are 64 bit */
		1584	req->offs = start;
		1585	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1586	req->int2 = flags;
		1587	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1588	#endif
1366		1589
		1590	REQ_SEND;
		1591	}
		1592
1367	void	1593	void
1368	aio_nop (callback=&PL_sv_undef)	1594	aio_busy (double delay, SV *callback=&PL_sv_undef)
1369	SV * callback
1370	PPCODE:	1595	PPCODE:
1371	{	1596	{
1372	dREQ;	1597	dREQ;
1373		1598
1374	req->type = REQ_NOP;	1599	req->type = EIO_BUSY;
		1600	req->nv1 = delay < 0. ? 0. : delay;
1375		1601
1376	REQ_SEND;	1602	REQ_SEND;
1377	}	1603	}
1378		1604
1379	void	1605	void
1380	aioreq_pri (int pri = DEFAULT_PRI)	1606	aio_group (SV *callback=&PL_sv_undef)
1381	CODE:	1607	PPCODE:
		1608	{
		1609	dREQ;
		1610
		1611	req->type = EIO_GROUP;
		1612
		1613	req_submit (req);
		1614	XPUSHs (req_sv (req, aio_grp_stash));
		1615	}
		1616
		1617	void
		1618	aio_nop (SV *callback=&PL_sv_undef)
		1619	ALIAS:
		1620	aio_nop = EIO_NOP
		1621	aio_sync = EIO_SYNC
		1622	PPCODE:
		1623	{
		1624	dREQ;
		1625
		1626	req->type = ix;
		1627
		1628	REQ_SEND;
		1629	}
		1630
		1631	int
		1632	aioreq_pri (int pri = 0)
		1633	CODE:
		1634	RETVAL = next_pri;
		1635	if (items > 0)
		1636	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	1637	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	1638	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	1639	next_pri = pri;
		1640	}
		1641	OUTPUT:
		1642	RETVAL
1385		1643
1386	void	1644	void
1387	aioreq_nice (int nice = 0)	1645	aioreq_nice (int nice = 0)
1388	CODE:	1646	CODE:
1389	nice = next_pri - nice;	1647	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	1648	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	1649	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	1650	next_pri = nice;
1393		1651
1394	void	1652	void
1395	flush ()	1653	flush ()
		1654	CODE:
		1655	while (eio_nreqs ())
		1656	{
		1657	poll_wait ();
		1658	poll_cb ();
		1659	}
		1660
		1661	int
		1662	poll ()
		1663	CODE:
		1664	poll_wait ();
		1665	RETVAL = poll_cb ();
		1666	OUTPUT:
		1667	RETVAL
		1668
		1669	int
		1670	poll_fileno ()
		1671	CODE:
		1672	RETVAL = s_epipe_fd (&respipe);
		1673	OUTPUT:
		1674	RETVAL
		1675
		1676	int
		1677	poll_cb (...)
1396	PROTOTYPE:	1678	PROTOTYPE:
1397	CODE:	1679	CODE:
1398	while (nreqs)
1399	{
1400	poll_wait ();
1401	poll_cb (0);	1680	RETVAL = poll_cb ();
1402	}
1403
1404	void
1405	poll()
1406	PROTOTYPE:
1407	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();
1411	poll_cb (0);
1412	}
1413
1414	int
1415	poll_fileno()
1416	PROTOTYPE:
1417	CODE:
1418	RETVAL = respipe [0];
1419	OUTPUT:	1681	OUTPUT:
1420	RETVAL	1682	RETVAL
1421		1683
		1684	void
		1685	poll_wait ()
		1686	CODE:
		1687	poll_wait ();
		1688
1422	int	1689	int
1423	poll_cb(...)	1690	nreqs ()
1424	PROTOTYPE:
1425	CODE:	1691	CODE:
1426	RETVAL = poll_cb (0);	1692	RETVAL = eio_nreqs ();
1427	OUTPUT:	1693	OUTPUT:
1428	RETVAL	1694	RETVAL
1429		1695
1430	int	1696	int
1431	poll_some(int max = 0)	1697	nready ()
1432	PROTOTYPE: $
1433	CODE:	1698	CODE:
1434	RETVAL = poll_cb (max);	1699	RETVAL = eio_nready ();
1435	OUTPUT:	1700	OUTPUT:
1436	RETVAL	1701	RETVAL
1437		1702
1438	void	1703	int
1439	poll_wait()	1704	npending ()
1440	PROTOTYPE:
1441	CODE:	1705	CODE:
1442	if (nreqs)	1706	RETVAL = eio_npending ();
1443	poll_wait ();
1444
1445	int
1446	nreqs()
1447	PROTOTYPE:
1448	CODE:
1449	RETVAL = nreqs;
1450	OUTPUT:	1707	OUTPUT:
1451	RETVAL	1708	RETVAL
1452		1709
		1710	int
		1711	nthreads ()
		1712	CODE:
		1713	RETVAL = eio_nthreads ();
		1714	OUTPUT:
		1715	RETVAL
		1716
		1717	int
		1718	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1719	CODE:
		1720	RETVAL = posix_fadvise (fh, offset, length, advice);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	IV
		1725	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1726	CODE:
		1727	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	void
		1732	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1733	PPCODE:
		1734	sv_unmagic (scalar, MMAP_MAGIC);
		1735	{
		1736	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1737	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1738	if (addr == (void *)-1)
		1739	XSRETURN_NO;
		1740
		1741	sv_force_normal (scalar);
		1742
		1743	/* we store the length in mg_obj, as namlen is I32 :/ */
		1744	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1745	->mg_obj = (SV *)length;
		1746
		1747	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1748
		1749	if (!(prot & PROT_WRITE))
		1750	SvREADONLY_on (scalar);
		1751
		1752	if (SvLEN (scalar))
		1753	Safefree (SvPVX (scalar));
		1754
		1755	SvPVX (scalar) = (char *)addr;
		1756	SvCUR_set (scalar, length);
		1757	SvLEN_set (scalar, 0);
		1758	SvPOK_only (scalar);
		1759
		1760	XSRETURN_YES;
		1761	}
		1762
		1763	void
		1764	munmap (SV *scalar)
		1765	CODE:
		1766	sv_unmagic (scalar, MMAP_MAGIC);
		1767
		1768	int
		1769	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1770	ALIAS:
		1771	mprotect = 1
		1772	CODE:
		1773	{
		1774	STRLEN svlen;
		1775	void *addr = SvPVbyte (scalar, svlen);
		1776	size_t len = SvUV (length);
		1777
		1778	if (offset < 0)
		1779	offset += svlen;
		1780
		1781	if (offset < 0 || offset > svlen)
		1782	croak ("offset outside of scalar");
		1783
		1784	if (!SvOK (length) || len + offset > svlen)
		1785	len = svlen - offset;
		1786
		1787	addr = (void *)(((intptr_t)addr) + offset);
		1788	eio_page_align (&addr, &len);
		1789
		1790	switch (ix)
		1791	{
		1792	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1793	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1794	}
		1795	}
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	int
		1800	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1801	CODE:
		1802	{
		1803	STRLEN svlen;
		1804	void *addr = SvPVbyte (scalar, svlen);
		1805	size_t len = SvUV (length);
		1806
		1807	if (offset < 0)
		1808	offset += svlen;
		1809
		1810	if (offset < 0 || offset > svlen)
		1811	croak ("offset outside of scalar");
		1812
		1813	if (!SvOK (length) || len + offset > svlen)
		1814	len = svlen - offset;
		1815
		1816	addr = (void *)(((intptr_t)addr) + offset);
		1817	eio_page_align (&addr, &len);
		1818	#if _POSIX_MEMLOCK_RANGE
		1819	RETVAL = munlock (addr, len);
		1820	#else
		1821	RETVAL = EIO_ENOSYS ();
		1822	#endif
		1823	}
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
		1828	munlockall ()
		1829	CODE:
		1830	#if _POSIX_MEMLOCK
		1831	munlockall ();
		1832	#else
		1833	RETVAL = EIO_ENOSYS ();
		1834	#endif
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	int
		1839	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1840	CODE:
		1841	{
		1842	#if HAVE_LINUX_SPLICE
		1843	loff_t off_in_, off_out_;
		1844	RETVAL = splice (
		1845	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1846	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1847	length, flags
		1848	);
		1849	#else
		1850	RETVAL = EIO_ENOSYS ();
		1851	#endif
		1852	}
		1853	OUTPUT:
		1854	RETVAL
		1855
		1856	int
		1857	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1858	CODE:
		1859	#if HAVE_LINUX_SPLICE
		1860	RETVAL = tee (rfh, wfh, length, flags);
		1861	#else
		1862	RETVAL = EIO_ENOSYS ();
		1863	#endif
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	void _on_next_submit (SV *cb)
		1868	CODE:
		1869	SvREFCNT_dec (on_next_submit);
		1870	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1871
1453	PROTOTYPES: DISABLE	1872	PROTOTYPES: DISABLE
		1873
		1874	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1875
		1876	BOOT:
		1877	{
		1878	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1879	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1880	}
		1881
		1882	void
		1883	DESTROY (SV *self)
		1884	CODE:
		1885	{
		1886	aio_wd wd = SvAIO_WD (self);
		1887	#if HAVE_AT
		1888	{
		1889	SV *callback = &PL_sv_undef;
		1890	dREQ; /* clobbers next_pri :/ */
		1891	next_pri = req->pri; /* restore next_pri */
		1892	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1893	req->type = EIO_WD_CLOSE;
		1894	req->wd = wd;
		1895	REQ_SEND;
		1896	}
		1897	#else
		1898	eio_wd_close_sync (wd);
		1899	#endif
		1900	}
1454		1901
1455	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1902	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1456		1903
1457	void	1904	void
1458	cancel (aio_req_ornot req)	1905	cancel (aio_req_ornot req)
1459	CODE:	1906	CODE:
1460	req_cancel (req);	1907	eio_cancel (req);
1461		1908
1462	void	1909	void
1463	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1910	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1464	CODE:	1911	PPCODE:
		1912	{
		1913	if (GIMME_V != G_VOID)
		1914	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1915
		1916	if (items > 1)
		1917	{
		1918	SV *cb_cv =get_cb (callback);
		1919
1465	SvREFCNT_dec (req->callback);	1920	SvREFCNT_dec (req->callback);
1466	req->callback = newSVsv (callback);	1921	req->callback = SvREFCNT_inc (cb_cv);
		1922	}
		1923	}
1467		1924
1468	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1925	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1469		1926
1470	void	1927	void
1471	add (aio_req grp, ...)	1928	add (aio_req grp, ...)
1472	PPCODE:	1929	PPCODE:
1473	{	1930	{
1474	int i;	1931	int i;
1475	aio_req req;
1476		1932
1477	if (grp->fd == 2)	1933	if (grp->int1 == 2)
1478	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1934	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1479		1935
1480	for (i = 1; i < items; ++i )	1936	for (i = 1; i < items; ++i )
1481	{	1937	{
		1938	aio_req req;
		1939
1482	if (GIMME_V != G_VOID)	1940	if (GIMME_V != G_VOID)
1483	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1941	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1484		1942
1485	req = SvAIO_REQ (ST (i));	1943	req = SvAIO_REQ (ST (i));
1486		1944
1487	if (req)	1945	if (req)
1488	{	1946	eio_grp_add (grp, req);
1489	++grp->length;
1490	req->grp = grp;
1491
1492	req->grp_prev = 0;
1493	req->grp_next = grp->grp_first;
1494
1495	if (grp->grp_first)
1496	grp->grp_first->grp_prev = req;
1497
1498	grp->grp_first = req;
1499	}
1500	}	1947	}
1501	}	1948	}
1502		1949
1503	void	1950	void
1504	cancel_subs (aio_req_ornot req)	1951	cancel_subs (aio_req_ornot req)
…		…
1508	void	1955	void
1509	result (aio_req grp, ...)	1956	result (aio_req grp, ...)
1510	CODE:	1957	CODE:
1511	{	1958	{
1512	int i;	1959	int i;
		1960	AV *av;
		1961
		1962	grp->errorno = errno;
		1963
1513	AV *av = newAV ();	1964	av = newAV ();
		1965	av_extend (av, items - 1);
1514		1966
1515	for (i = 1; i < items; ++i )	1967	for (i = 1; i < items; ++i )
1516	av_push (av, newSVsv (ST (i)));	1968	av_push (av, newSVsv (ST (i)));
1517		1969
1518	SvREFCNT_dec (grp->data);	1970	SvREFCNT_dec (grp->sv1);
1519	grp->data = (SV *)av;	1971	grp->sv1 = (SV *)av;
1520	}	1972	}
		1973
		1974	void
		1975	errno (aio_req grp, int errorno = errno)
		1976	CODE:
		1977	grp->errorno = errorno;
1521		1978
1522	void	1979	void
1523	limit (aio_req grp, int limit)	1980	limit (aio_req grp, int limit)
1524	CODE:	1981	CODE:
1525	grp->fd2 = limit;	1982	eio_grp_limit (grp, limit);
1526	aio_grp_feed (grp);
1527		1983
1528	void	1984	void
1529	feed (aio_req grp, SV *callback=&PL_sv_undef)	1985	feed (aio_req grp, SV *callback=&PL_sv_undef)
1530	CODE:	1986	CODE:
1531	{	1987	{
1532	SvREFCNT_dec (grp->fh2);	1988	SvREFCNT_dec (grp->sv2);
1533	grp->fh2 = newSVsv (callback);	1989	grp->sv2 = newSVsv (callback);
		1990	grp->feed = aio_grp_feed;
1534		1991
1535	if (grp->fd2 <= 0)	1992	if (grp->int2 <= 0)
1536	grp->fd2 = 2;	1993	grp->int2 = 2;
1537		1994
1538	aio_grp_feed (grp);	1995	eio_grp_limit (grp, grp->int2);
1539	}	1996	}
1540		1997

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