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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.67 by root, Tue Oct 24 03:17:39 2006 UTC vs.
Revision 1.236 by root, Thu Jun 25 17:40:24 2015 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "schmorp.h"
14
15	#include <pthread.h>
16		10
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	14	#include <sys/types.h>
22	#include <sys/stat.h>	15	#include <sys/stat.h>
23	#include <limits.h>	16	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	17	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	18	#include <sched.h>
28		19
29	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
30	# if __linux
31	# include <sys/sendfile.h>
32	# elif __freebsd
33	# include <sys/socket.h>
34	# include <sys/uio.h>	21	# include <sys/mman.h>
35	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. on't complain if this fails for you.
		27	*/
		28	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		29	# include <linux/fs.h>
		30	# ifdef FS_IOC_FIEMAP
		31	# include <linux/types.h>
		32	# include <linux/fiemap.h>
		33	# define HAVE_FIEMAP 1
		34	# endif
		35	#endif
		36
		37	/* perl namespace pollution */
		38	#undef VERSION
		39
		40	/* perl stupidly overrides readdir and maybe others */
		41	/* with thread-unsafe versions, imagine that :( */
		42	#undef readdir
		43	#undef opendir
		44	#undef closedir
		45
		46	#ifdef _WIN32
		47
		48	// perl overrides all those nice libc functions
		49
		50	#undef malloc
		51	#undef free
		52	#undef open
		53	#undef read
		54	#undef write
		55	#undef send
		56	#undef recv
		57	#undef stat
		58	#undef lstat
		59	#undef fstat
		60	#undef truncate
		61	#undef ftruncate
		62	#undef open
		63	#undef link
		64	#undef close
		65	#undef unlink
		66	#undef mkdir
		67	#undef rmdir
		68	#undef rename
		69	#undef lseek
		70	#undef opendir
		71	#undef readdir
		72	#undef closedir
		73	#undef chmod
		74	#undef fchmod
		75	#undef dup
		76	#undef dup2
		77	#undef abort
		78	#undef pipe
		79
		80	#define EIO_STRUCT_STAT struct _stati64
		81	#define EIO_STRUCT_STATI64
		82
		83	#else
		84
36	# include <sys/socket.h>	85	#include <sys/time.h>
37	# elif __solaris /* not yet */
38	# include <sys/sendfile.h>	86	#include <sys/select.h>
		87	#include <unistd.h>
		88	#include <utime.h>
		89	#include <signal.h>
		90
		91	#define EIO_STRUCT_STAT Stat_t
		92
		93	#endif
		94
		95	/*****************************************************************************/
		96
		97	#if __GNUC__ >= 3
		98	# define expect(expr,value) __builtin_expect ((expr),(value))
		99	#else
		100	# define expect(expr,value) (expr)
		101	#endif
		102
		103	#define expect_false(expr) expect ((expr) != 0, 0)
		104	#define expect_true(expr) expect ((expr) != 0, 1)
		105
		106	/*****************************************************************************/
		107
		108	typedef SV SV8; /* byte-sv, used for argument-checking */
		109	typedef int aio_rfd; /* read file desriptor */
		110	typedef int aio_wfd; /* write file descriptor */
		111
		112	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		113
		114	#define EIO_REQ_MEMBERS \
		115	SV *callback; \
		116	SV *sv1, *sv2; \
		117	SV *sv3, *sv4; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	static int req_invoke (eio_req *req);
		127	#define EIO_FINISH(req) req_invoke (req)
		128	static void req_destroy (eio_req *grp);
		129	#define EIO_DESTROY(req) req_destroy (req)
		130
		131	#include "libeio/eio.c"
		132
		133	#if !HAVE_POSIX_FADVISE
		134	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#if !HAVE_POSIX_MADVISE
		138	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		139	#endif
		140
		141	#ifndef MAP_ANONYMOUS
		142	# ifdef MAP_ANON
		143	# define MAP_ANONYMOUS MAP_ANON
39	# else	144	# else
40	# error sendfile support requested but not available	145	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
41	# endif	146	# endif
42	#endif	147	#endif
43		148
44	/* used for struct dirent, AIX doesn't provide it */	149	/* defines all sorts of constants to 0 unless they are already defined */
45	#ifndef NAME_MAX	150	/* also provides const_iv_ and const_niv_ macros for them */
46	# define NAME_MAX 4096	151	#include "def0.h"
47	#endif
48		152
49	#if __ia64	153	#ifndef makedev
50	# define STACKSIZE 65536	154	# define makedev(maj,min) (((maj) << 8) | (min))
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN
53	#else
54	# define STACKSIZE 16384
55	#endif	155	#endif
		156	#ifndef major
		157	# define major(dev) ((dev) >> 8)
		158	#endif
		159	#ifndef minor
		160	# define minor(dev) ((dev) & 0xff)
		161	#endif
56		162
57	/* buffer size for various temporary buffers */	163	#if PAGESIZE <= 0
58	#define AIO_BUFSIZE 65536	164	# define PAGESIZE sysconf (_SC_PAGESIZE)
		165	#endif
59		166
60	#define dBUF \	167	/*****************************************************************************/
61	char *aio_buf = malloc (AIO_BUFSIZE); \	168
62	if (!aio_buf) \	169	static void
		170	fiemap (eio_req *req)
		171	{
		172	req->result = -1;
		173
		174	#if HAVE_FIEMAP
		175	/* assume some c99 */
		176	struct fiemap *fiemap = 0;
		177	size_t end_offset;
		178	int count = req->int3;
		179
		180	req->flags |= EIO_FLAG_PTR1_FREE;
		181
		182	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		183	/* increase in 3.5kb steps */
		184	if (count < 0)
		185	count = 8;
		186
		187	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		188	errno = ENOMEM;
		189	if (!fiemap)
63	return -1;	190	return;
64		191
65	#define fBUF free (aio_buf)	192	req->ptr1 = fiemap;
66		193
67	enum {	194	fiemap->fm_start = req->offs;
68	REQ_QUIT,	195	fiemap->fm_length = req->size;
69	REQ_OPEN, REQ_CLOSE,	196	fiemap->fm_flags = req->int2;
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,	197	fiemap->fm_extent_count = count;
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,
79	};
80		198
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	199	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	200	return;
83		201
84	typedef struct aio_cb	202	if (req->int3 >= 0 /* not autosizing */
85	{	203	|| !fiemap->fm_mapped_extents /* no more extents */
86	struct aio_cb *volatile next;	204	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		205	goto done;
87		206
88	SV *data, *callback;	207	/* else we have to loop -
89	SV *fh, *fh2;	208	* it would be tempting (actually I tried that first) to just query the
90	void *dataptr, *data2ptr;	209	* number of extents needed, but linux often feels like not returning all
91	Stat_t *statdata;	210	* extents, without telling us it left any out. this complicates
92	off_t offset;	211	* this quite a bit.
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;
97	int type;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101
102	unsigned char flags;
103	unsigned char pri;
104
105	SV *self; /* the perl counterpart of this request, if any */
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
107	} aio_cb;
108
109	enum {
110	FLAG_CANCELLED = 0x01,
111	};
112
113	typedef aio_cb *aio_req;
114	typedef aio_cb *aio_req_ornot;
115
116	enum {
117	PRI_MIN = -4,
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};
124
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126
127	static int started, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;
130	static int respipe [2];
131
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif
137
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
141
142	/*
143	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.
146	*/	212	*/
147	typedef struct {
148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
149	int size;
150	} reqq;
151		213
152	static reqq req_queue;	214	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
153	static reqq res_queue;
154		215
155	int reqq_push (reqq *q, aio_req req)	216	for (;;)
156	{
157	int pri = req->pri;
158	req->next = 0;
159
160	if (q->qe[pri])
161	{	217	{
162	q->qe[pri]->next = req;	218	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
163	q->qe[pri] = req;	219	char scratch[3072];
164	}	220	struct fiemap *incmap = (struct fiemap *)scratch;
165	else
166	q->qe[pri] = q->qs[pri] = req;
167		221
168	return q->size++;	222	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
169	}	223	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		224	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		225	incmap->fm_flags = fiemap->fm_flags;
		226	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
170		227
171	aio_req reqq_shift (reqq *q)	228	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
172	{
173	int pri;
174
175	if (!q->size)
176	return 0;	229	return;
177		230
178	--q->size;	231	if (!incmap->fm_mapped_extents)
		232	goto done;
179		233
180	for (pri = NUM_PRI; pri--; )	234	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
181	{	235	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
182	aio_req req = q->qs[pri];	236	errno = ENOMEM;
183
184	if (req)	237	if (!fiemap)
		238	return;
		239
		240	req->ptr1 = fiemap;
		241
		242	for (count = 0; count < incmap->fm_mapped_extents; ++count)
185	{	243	{
186	if (!(q->qs[pri] = req->next))	244	struct fiemap_extent *e = incmap->fm_extents + count;
187	q->qe[pri] = 0;
188		245
189	return req;	246	if (e->fe_logical + e->fe_length >= end_offset)
		247	goto done;
		248
		249	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		250
		251	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		252	goto done;
		253
190	}	254	}
191	}	255	}
192		256
193	abort ();	257	done:
194	}	258	req->result = 0;
195		259
		260	#else
		261	errno = ENOSYS;
		262	#endif
		263	}
		264
		265	/*****************************************************************************/
		266
		267	enum {
		268	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		269	};
		270
		271	typedef eio_req *aio_req;
		272	typedef eio_req *aio_req_ornot;
		273	typedef eio_wd aio_wd;
		274
		275	static SV *on_next_submit;
		276	static int next_pri = EIO_PRI_DEFAULT;
		277	static int max_outstanding;
		278
		279	static s_epipe respipe;
		280
		281	static void req_destroy (aio_req req);
196	static void req_invoke (aio_req req);	282	static void req_cancel (aio_req req);
197	static void req_free (aio_req req);	283
		284	static void
		285	want_poll (void)
		286	{
		287	/* write a dummy byte to the pipe so fh becomes ready */
		288	s_epipe_signal (&respipe);
		289	}
		290
		291	static void
		292	done_poll (void)
		293	{
		294	/* read any signals sent by the worker threads */
		295	s_epipe_drain (&respipe);
		296	}
198		297
199	/* must be called at most once */	298	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	299	static SV *
		300	req_sv (aio_req req, HV *stash)
201	{	301	{
202	if (!req->self)	302	if (!req->self)
203	{	303	{
204	req->self = (SV *)newHV ();	304	req->self = (SV *)newHV ();
205	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	305	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
206	}	306	}
207		307
208	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	308	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
209	}	309	}
210		310
211	static aio_req SvAIO_REQ (SV *sv)	311	static SV *
		312	newSVaio_wd (aio_wd wd)
		313	{
		314	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		315	}
		316
		317	static aio_req
		318	SvAIO_REQ (SV *sv)
212	{	319	{
213	MAGIC *mg;	320	MAGIC *mg;
214		321
215	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	322	if (!SvROK (sv)
		323	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		324	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		325	&& SvSTASH (SvRV (sv)) != aio_req_stash
		326	&& !sv_derived_from (sv, "IO::AIO::REQ")))
216	croak ("object of class " AIO_REQ_KLASS " expected");	327	croak ("object of class IO::AIO::REQ expected");
217		328
218	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	329	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
219		330
220	return mg ? (aio_req)mg->mg_ptr : 0;	331	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	332	}
222		333
		334	static aio_wd
		335	SvAIO_WD (SV *sv)
		336	{
		337	if (!SvROK (sv)
		338	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		339	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		340	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		341
		342	return (aio_wd)(long)SvIVX (SvRV (sv));
		343	}
		344
		345	static SV *
		346	newmortalFH (int fd, int flags)
		347	{
		348	if (fd < 0)
		349	return &PL_sv_undef;
		350
		351	GV *gv = (GV *)sv_newmortal ();
		352	char sym[64];
		353	int symlen;
		354
		355	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		356	gv_init (gv, aio_stash, sym, symlen, 0);
		357
		358	symlen = snprintf (
		359	sym,
		360	sizeof (sym),
		361	"%s&=%d",
		362	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		363	fd
		364	);
		365
		366	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		367	? (SV *)gv : &PL_sv_undef;
		368	}
		369
		370	static void
223	static void aio_grp_feed (aio_req grp)	371	aio_grp_feed (aio_req grp)
224	{	372	{
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	373	if (grp->sv2 && SvOK (grp->sv2))
226	{	374	{
227	int old_len = grp->length;
228
229	if (grp->fh2 && SvOK (grp->fh2))
230	{
231	dSP;	375	dSP;
232		376
233	ENTER;	377	ENTER;
234	SAVETMPS;	378	SAVETMPS;
235	PUSHMARK (SP);	379	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	380	XPUSHs (req_sv (grp, aio_grp_stash));
237	PUTBACK;	381	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	382	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	383	SPAGAIN;
240	FREETMPS;	384	FREETMPS;
241	LEAVE;	385	LEAVE;
242	}
243
244	/* stop if no progress has been made */
245	if (old_len == grp->length)
246	{
247	SvREFCNT_dec (grp->fh2);
248	grp->fh2 = 0;
249	break;
250	}
251	}	386	}
252	}	387	}
253		388
254	static void aio_grp_dec (aio_req grp)	389	static void
		390	req_submit (eio_req *req)
255	{	391	{
256	--grp->length;	392	eio_submit (req);
257		393
258	/* call feeder, if applicable */	394	if (expect_false (on_next_submit))
259	aio_grp_feed (grp);
260
261	/* finish, if done */
262	if (!grp->length && grp->fd)
263	{	395	{
264	req_invoke (grp);	396	dSP;
265	req_free (grp);	397	SV *cb = sv_2mortal (on_next_submit);
		398
		399	on_next_submit = 0;
		400
		401	PUSHMARK (SP);
		402	PUTBACK;
		403	call_sv (cb, G_DISCARD | G_EVAL);
266	}	404	}
267	}	405	}
268		406
269	static void poll_wait ()	407	static int
		408	req_invoke (eio_req *req)
270	{	409	{
271	fd_set rfd;	410	if (req->flags & FLAG_SV2_RO_OFF)
		411	SvREADONLY_off (req->sv2);
272		412
273	while (nreqs)	413	if (!EIO_CANCELLED (req) && req->callback)
274	{	414	{
275	int size;
276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)
295	{
296	dSP;	415	dSP;
297		416	static SV *sv_result_cache; /* caches the result integer SV */
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	417	SV *sv_result;
299	{
300	errno = req->errorno;
301		418
302	ENTER;	419	ENTER;
303	SAVETMPS;	420	SAVETMPS;
304	PUSHMARK (SP);	421	PUSHMARK (SP);
305	EXTEND (SP, 1);	422	EXTEND (SP, 1);
306		423
		424	/* do not recreate the result IV from scratch each time */
		425	if (expect_true (sv_result_cache))
		426	{
		427	sv_result = sv_result_cache; sv_result_cache = 0;
		428	SvIV_set (sv_result, req->result);
		429	SvIOK_only (sv_result);
		430	}
		431	else
		432	{
		433	sv_result = newSViv (req->result);
		434	SvREADONLY_on (sv_result);
		435	}
		436
307	switch (req->type)	437	switch (req->type)
308	{	438	{
		439	case EIO_WD_OPEN:
		440	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		441	break;
		442
309	case REQ_READDIR:	443	case EIO_READDIR:
310	{	444	{
311	SV *rv = &PL_sv_undef;	445	SV *rv = &PL_sv_undef;
312		446
313	if (req->result >= 0)	447	if (req->result >= 0)
314	{	448	{
		449	int i;
315	char *buf = req->data2ptr;	450	char *names = (char *)req->ptr2;
		451	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
316	AV *av = newAV ();	452	AV *av = newAV ();
317		453
318	while (req->result)	454	av_extend (av, req->result - 1);
		455
		456	for (i = 0; i < req->result; ++i)
319	{	457	{
		458	if (req->int1 & EIO_READDIR_DENTS)
		459	{
		460	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		461
		462	if (req->int1 & EIO_READDIR_CUSTOM2)
		463	{
		464	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		465	AV *avent = newAV ();
		466
		467	av_extend (avent, 2);
		468
		469	if (!sv_type [ent->type])
		470	{
		471	sv_type [ent->type] = newSViv (ent->type);
		472	SvREADONLY_on (sv_type [ent->type]);
		473	}
		474
		475	av_store (avent, 0, namesv);
		476	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		477	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		478
		479	av_store (av, i, newRV_noinc ((SV *)avent));
		480	}
		481	else
		482	av_store (av, i, namesv);
		483
		484	++ent;
		485	}
		486	else
		487	{
320	SV *sv = newSVpv (buf, 0);	488	SV *name = newSVpv (names, 0);
321
322	av_push (av, sv);	489	av_store (av, i, name);
323	buf += SvCUR (sv) + 1;	490	names += SvCUR (name) + 1;
324	req->result--;	491	}
325	}	492	}
326		493
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	494	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	495	}
329		496
330	PUSHs (rv);	497	PUSHs (rv);
		498
		499	if (req->int1 & EIO_READDIR_CUSTOM1)
		500	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
331	}	501	}
332	break;	502	break;
333		503
334	case REQ_OPEN:	504	case EIO_OPEN:
		505	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		506	break;
		507
		508	case EIO_STATVFS:
		509	case EIO_FSTATVFS:
335	{	510	{
336	/* convert fd to fh */	511	SV *rv = &PL_sv_undef;
337	SV *fh;	512
		513	#ifndef _WIN32
		514	if (req->result >= 0)
		515	{
		516	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		517	HV *hv = newHV ();
		518	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		519	* chooses to make it a struct.
		520	*/
		521	unsigned long fsid = 0;
		522	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
338		523
339	PUSHs (sv_2mortal (newSViv (req->result)));	524	rv = sv_2mortal (newRV_noinc ((SV *)hv));
340	PUTBACK;
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
342	SPAGAIN;
343		525
344	fh = SvREFCNT_inc (POPs);	526	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		527	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		528	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		529	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		530	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		531	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		532	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		533	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		534	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		535	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		536	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		537	}
		538	#endif
345		539
346	PUSHMARK (SP);	540	PUSHs (rv);
347	XPUSHs (sv_2mortal (fh));
348	}	541	}
		542
349	break;	543	break;
350		544
351	case REQ_GROUP:	545	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	546	req->int1 = 2; /* mark group as finished */
353		547
354	if (req->data)	548	if (req->sv1)
355	{	549	{
356	int i;	550	int i;
357	AV *av = (AV *)req->data;	551	AV *av = (AV *)req->sv1;
358		552
359	EXTEND (SP, AvFILL (av) + 1);	553	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	554	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	555	PUSHs (*av_fetch (av, i, 0));
362	}	556	}
363	break;	557	break;
364		558
365	case REQ_NOP:	559	case EIO_NOP:
366	case REQ_SLEEP:	560	case EIO_BUSY:
367	break;	561	break;
368		562
		563	case EIO_READLINK:
		564	case EIO_REALPATH:
		565	if (req->result > 0)
		566	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		567	break;
		568
		569	case EIO_STAT:
		570	case EIO_LSTAT:
		571	case EIO_FSTAT:
		572	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		573
		574	if (!(PL_laststatval = req->result))
		575	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		576	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		577
		578	PUSHs (sv_result);
		579	break;
		580
		581	case EIO_SEEK:
		582	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		583	break;
		584
		585	case EIO_READ:
		586	{
		587	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		588	*SvEND (req->sv2) = 0;
		589	SvPOK_only (req->sv2);
		590	SvSETMAGIC (req->sv2);
		591	PUSHs (sv_result);
		592	}
		593	break;
		594
		595	case EIO_CUSTOM:
		596	if (req->feed == fiemap)
		597	{
		598	#if HAVE_FIEMAP
		599	if (!req->result)
		600	{
		601	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		602
		603	if (fiemap->fm_extent_count)
		604	{
		605	AV *av = newAV ();
		606	int i;
		607
		608	while (fiemap->fm_mapped_extents)
		609	{
		610	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		611	AV *ext_av = newAV ();
		612
		613	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		614	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		615	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		616	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		617
		618	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		619	}
		620
		621	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		622	}
		623	else
		624	{
		625	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		626	PUSHs (sv_result);
		627	}
		628	}
		629	#endif
		630	}
		631	else
		632	PUSHs (sv_result);
		633	break;
		634
		635	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		636	if (req->result > 0)
		637	SvIV_set (sv_result, 0);
		638	/* FALLTHROUGH */
		639
369	default:	640	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	641	PUSHs (sv_result);
371	break;	642	break;
372	}	643	}
373		644
		645	errno = req->errorno;
374		646
375	PUTBACK;	647	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	648	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	649	SPAGAIN;
		650
		651	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		652	SvREFCNT_dec (sv_result);
		653	else
		654	sv_result_cache = sv_result;
378		655
379	FREETMPS;	656	FREETMPS;
380	LEAVE;	657	LEAVE;
		658
		659	PUTBACK;
381	}	660	}
382		661
383	if (req->grp)	662	return !!SvTRUE (ERRSV);
384	{
385	aio_req grp = req->grp;
386
387	/* unlink request */
388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
390
391	if (grp->grp_first == req)
392	grp->grp_first = req->grp_next;
393
394	aio_grp_dec (grp);
395	}
396
397	if (SvTRUE (ERRSV))
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	663	}
403		664
404	static void req_free (aio_req req)	665	static void
		666	req_destroy (aio_req req)
405	{	667	{
406	if (req->self)	668	if (req->self)
407	{	669	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	670	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	671	SvREFCNT_dec (req->self);
410	}	672	}
411		673
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	674	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	675	SvREFCNT_dec (req->sv2);
		676	SvREFCNT_dec (req->sv3);
		677	SvREFCNT_dec (req->sv4);
415	SvREFCNT_dec (req->callback);	678	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417		679
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420
421	Safefree (req);	680	free (req);
422	}	681	}
423		682
424	static void req_cancel (aio_req req)	683	static void
		684	req_cancel_subs (aio_req grp)
425	{	685	{
426	req->flags |= FLAG_CANCELLED;
427
428	if (req->type == REQ_GROUP)	686	if (grp->type != EIO_GROUP)
		687	return;
		688
		689	SvREFCNT_dec (grp->sv2);
		690	grp->sv2 = 0;
		691
		692	eio_grp_cancel (grp);
		693	}
		694
		695	static void ecb_cold
		696	create_respipe (void)
		697	{
		698	if (s_epipe_renew (&respipe))
		699	croak ("IO::AIO: unable to initialize result pipe");
		700	}
		701
		702	static void
		703	poll_wait (void)
		704	{
		705	while (eio_nreqs ())
429	{	706	{
430	aio_req sub;	707	int size;
431		708
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	709	X_LOCK (reslock);
433	req_cancel (sub);	710	size = EIO_POOL->res_queue.size;
		711	X_UNLOCK (reslock);
		712
		713	if (size)
		714	return;
		715
		716	etp_maybe_start_thread (EIO_POOL);
		717
		718	s_epipe_wait (&respipe);
434	}	719	}
435	}	720	}
436		721
437	static int poll_cb ()	722	static int
		723	poll_cb (void)
438	{	724	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	725	for (;;)
445	{	726	{
446	pthread_mutex_lock (&reslock);	727	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		728
449	if (req)	729	if (res > 0)
		730	croak (0);
		731
		732	if (!max_outstanding || max_outstanding > eio_nreqs ())
		733	return res;
		734
		735	poll_wait ();
		736	}
		737	}
		738
		739	static void ecb_cold
		740	reinit (void)
		741	{
		742	create_respipe ();
		743
		744	if (eio_init (want_poll, done_poll) < 0)
		745	croak ("IO::AIO: unable to initialise eio library");
		746	}
		747
		748	/*****************************************************************************/
		749
		750	#if !_POSIX_MAPPED_FILES
		751	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		752	# define munmap(addr,length) EIO_ENOSYS ()
		753	#endif
		754
		755	#if !_POSIX_MEMORY_PROTECTION
		756	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		757	#endif
		758
		759	#define MMAP_MAGIC PERL_MAGIC_ext
		760
		761	static int ecb_cold
		762	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		763	{
		764	int old_errno = errno;
		765	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		766	errno = old_errno;
		767
		768	mg->mg_obj = 0; /* just in case */
		769
		770	SvREADONLY_off (sv);
		771
		772	if (SvPVX (sv) != mg->mg_ptr)
		773	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		774
		775	SvCUR_set (sv, 0);
		776	SvPVX (sv) = 0;
		777	SvOK_off (sv);
		778
		779	return 0;
		780	}
		781
		782	static MGVTBL mmap_vtbl = {
		783	0, 0, 0, 0, mmap_free
		784	};
		785
		786	/*****************************************************************************/
		787
		788	static SV *
		789	get_cb (SV *cb_sv)
		790	{
		791	SvGETMAGIC (cb_sv);
		792	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		793	}
		794
		795	static aio_req ecb_noinline
		796	dreq (SV *callback)
		797	{
		798	SV *cb_cv;
		799	aio_req req;
		800	int req_pri = next_pri;
		801	next_pri = EIO_PRI_DEFAULT;
		802
		803	cb_cv = get_cb (callback);
		804
		805	req = calloc (sizeof (*req), 1);
		806	if (!req)
		807	croak ("out of memory during eio_req allocation");
		808
		809	req->callback = SvREFCNT_inc (cb_cv);
		810	req->pri = req_pri;
		811
		812	return req;
		813	}
		814
		815	#define dREQ \
		816	aio_req req = dreq (callback); \
		817
		818	#define REQ_SEND \
		819	PUTBACK; \
		820	req_submit (req); \
		821	SPAGAIN; \
		822	\
		823	if (GIMME_V != G_VOID) \
		824	XPUSHs (req_sv (req, aio_req_stash));
		825
		826	ecb_inline void
		827	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		828	{
		829	if (expect_false (SvROK (path)))
		830	{
		831	SV *rv = SvRV (path);
		832	SV *wdob;
		833
		834	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
450	{	835	{
451	if (!res_queue.size)	836	path = AvARRAY (rv)[1];
		837	wdob = AvARRAY (rv)[0];
		838
		839	if (SvOK (wdob))
452	{	840	{
453	/* read any signals sent by the worker threads */	841	*wd = SvAIO_WD (wdob);
454	char buf [32];	842	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
455	while (read (respipe [0], buf, 32) == 32)
456	;
457	}	843	}
		844	else
		845	*wd = EIO_INVALID_WD;
458	}	846	}
459		847	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
460	pthread_mutex_unlock (&reslock);
461
462	if (!req)
463	break;
464
465	--nreqs;
466
467	if (req->type == REQ_QUIT)
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{	848	{
471	req->fd = 1; /* mark request as delayed */	849	*wd = (aio_wd)(long)SvIVX (rv);
472	continue;	850	*wdsv = SvREFCNT_inc_NN (rv);
		851	*ptr = ".";
		852	return; /* path set to "." */
473	}	853	}
474	else	854	else
475	{	855	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	856	}
496		857
497	return count;	858	*pathsv = newSVsv (path);
		859	*ptr = SvPVbyte_nolen (*pathsv);
498	}	860	}
499		861
500	static void *aio_proc(void *arg);	862	static void ecb_noinline
501		863	req_set_path1 (aio_req req, SV *path)
502	static void start_thread (void)
503	{	864	{
504	sigset_t fullsigset, oldsigset;	865	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}	866	}
520		867
521	static void req_send (aio_req req)	868	static void ecb_noinline
		869	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
522	{	870	{
523	while (started < wanted && nreqs >= started)	871	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
524	start_thread ();
525		872
526	++nreqs;	873	switch (SvTYPE (rv))
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{	874	{
572	end_thread ();	875	case SVt_PVIO:
573	cur--;	876	case SVt_PVLV:
		877	case SVt_PVGV:
		878	req->type = type_fh;
		879	req->sv1 = newSVsv (fh_or_path);
		880	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		881	break;
		882
		883	default:
		884	req->type = type_path;
		885	req_set_path1 (req, fh_or_path);
		886	break;
574	}	887	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}	888	}
582		889
583	static void create_pipe ()	890	XS(boot_IO__AIO) ecb_cold;
584	{
585	if (pipe (respipe))
586	croak ("unable to initialize result pipe");
587		891
588	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	892	MODULE = IO::AIO PACKAGE = IO::AIO
589	croak ("cannot set result pipe to nonblocking mode");
590		893
591	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	894	PROTOTYPES: ENABLE
592	croak ("cannot set result pipe to nonblocking mode");
593	}
594		895
595	/*****************************************************************************/	896	BOOT:
596	/* work around various missing functions */
597
598	#if !HAVE_PREADWRITE
599	# define pread aio_pread
600	# define pwrite aio_pwrite
601
602	/*
603	* make our pread/pwrite safe against themselves, but not against
604	* normal read/write by using a mutex. slows down execution a lot,
605	* but that's your problem, not mine.
606	*/
607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
608
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{	897	{
611	ssize_t res;	898	static const struct {
612	off_t ooffset;	899	const char *name;
		900	IV iv;
		901	} *civ, const_iv[] = {
		902	# define const_niv(name, value) { # name, (IV) value },
		903	# define const_iv(name) { # name, (IV) name },
		904	# define const_eio(name) { # name, (IV) EIO_ ## name },
613		905
614	pthread_mutex_lock (&preadwritelock);	906	/* you have to re-run ./gendef0 after adding/removing any constants here */
615	ooffset = lseek (fd, 0, SEEK_CUR);	907	/* the first block can be undef if missing */
616	lseek (fd, offset, SEEK_SET);	908	const_iv (ENOSYS)
617	res = read (fd, buf, count);	909	const_iv (EXDEV)
618	lseek (fd, ooffset, SEEK_SET);	910	const_iv (EBADR)
619	pthread_mutex_unlock (&preadwritelock);
620		911
621	return res;	912	/* for lseek */
622	}	913	const_iv (SEEK_DATA)
		914	const_iv (SEEK_HOLE)
623		915
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	916	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
625	{	917	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
626	ssize_t res;	918	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
627	off_t ooffset;	919	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		920	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		921	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
628		922
629	pthread_mutex_lock (&preadwritelock);	923	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
630	ooffset = lseek (fd, 0, SEEK_CUR);	924	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
631	lseek (fd, offset, SEEK_SET);	925	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
632	res = write (fd, buf, count);	926	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
633	lseek (fd, offset, SEEK_SET);	927	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
634	pthread_mutex_unlock (&preadwritelock);
635		928
636	return res;	929	/* the second block will be 0 when missing */
637	}	930	const_iv (O_RDONLY)
638	#endif	931	const_iv (O_WRONLY)
		932	const_iv (O_RDWR)
		933	const_iv (O_CREAT)
		934	const_iv (O_TRUNC)
		935	const_iv (O_EXCL)
		936	const_iv (O_APPEND)
639		937
640	#if !HAVE_FDATASYNC	938	const_iv (O_ASYNC)
641	# define fdatasync fsync	939	const_iv (O_DIRECT)
642	#endif	940	const_iv (O_NOATIME)
643		941
644	#if !HAVE_READAHEAD	942	const_iv (O_CLOEXEC)
645	# define readahead aio_readahead	943	const_iv (O_NOCTTY)
		944	const_iv (O_NOFOLLOW)
		945	const_iv (O_NONBLOCK)
		946	const_iv (O_EXEC)
		947	const_iv (O_SEARCH)
		948	const_iv (O_DIRECTORY)
		949	const_iv (O_DSYNC)
		950	const_iv (O_RSYNC)
		951	const_iv (O_SYNC)
		952	const_iv (O_PATH)
		953	const_iv (O_TMPFILE)
		954	const_iv (O_TTY_INIT)
646		955
647	static ssize_t readahead (int fd, off_t offset, size_t count)	956	const_iv (S_IFIFO)
648	{	957	const_iv (S_IFCHR)
649	dBUF;	958	const_iv (S_IFBLK)
		959	const_iv (S_IFLNK)
		960	const_iv (S_IFREG)
		961	const_iv (S_IFDIR)
		962	const_iv (S_IFWHT)
		963	const_iv (S_IFSOCK)
		964	const_iv (S_IFMT)
650		965
651	while (count > 0)	966	const_iv (ST_RDONLY)
652	{	967	const_iv (ST_NOSUID)
653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	968	const_iv (ST_NODEV)
		969	const_iv (ST_NOEXEC)
		970	const_iv (ST_SYNCHRONOUS)
		971	const_iv (ST_MANDLOCK)
		972	const_iv (ST_WRITE)
		973	const_iv (ST_APPEND)
		974	const_iv (ST_IMMUTABLE)
		975	const_iv (ST_NOATIME)
		976	const_iv (ST_NODIRATIME)
		977	const_iv (ST_RELATIME)
654		978
655	pread (fd, aio_buf, len, offset);	979	const_iv (PROT_NONE)
656	offset += len;	980	const_iv (PROT_EXEC)
657	count -= len;	981	const_iv (PROT_READ)
658	}	982	const_iv (PROT_WRITE)
659		983
660	fBUF;	984	const_iv (MAP_PRIVATE)
		985	const_iv (MAP_SHARED)
		986	const_iv (MAP_FIXED)
		987	const_iv (MAP_ANONYMOUS)
661		988
662	errno = 0;	989	/* linuxish */
663	}	990	const_iv (MAP_HUGETLB)
664	#endif	991	const_iv (MAP_LOCKED)
		992	const_iv (MAP_NORESERVE)
		993	const_iv (MAP_POPULATE)
		994	const_iv (MAP_NONBLOCK)
		995	const_iv (MAP_GROWSDOWN)
		996	const_iv (MAP_32BIT)
		997	const_iv (MAP_HUGETLB)
		998	const_iv (MAP_STACK)
665		999
666	#if !HAVE_READDIR_R	1000	const_iv (FIEMAP_FLAG_SYNC)
667	# define readdir_r aio_readdir_r	1001	const_iv (FIEMAP_FLAG_XATTR)
		1002	const_iv (FIEMAP_FLAGS_COMPAT)
		1003	const_iv (FIEMAP_EXTENT_LAST)
		1004	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1005	const_iv (FIEMAP_EXTENT_DELALLOC)
		1006	const_iv (FIEMAP_EXTENT_ENCODED)
		1007	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1008	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1009	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1010	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1011	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1012	const_iv (FIEMAP_EXTENT_MERGED)
		1013	const_iv (FIEMAP_EXTENT_SHARED)
668		1014
669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1015	const_iv (SPLICE_F_MOVE)
670		1016	const_iv (SPLICE_F_NONBLOCK)
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	1017	const_iv (SPLICE_F_MORE)
672	{	1018	const_iv (SPLICE_F_GIFT)
673	struct dirent *e;
674	int errorno;
675		1019
676	pthread_mutex_lock (&readdirlock);	1020	/* these are libeio constants, and are independent of gendef0 */
		1021	const_eio (SEEK_SET)
		1022	const_eio (SEEK_CUR)
		1023	const_eio (SEEK_END)
677		1024
678	e = readdir (dirp);	1025	const_eio (MCL_FUTURE)
679	errorno = errno;	1026	const_eio (MCL_CURRENT)
680		1027
681	if (e)	1028	const_eio (MS_ASYNC)
682	{	1029	const_eio (MS_INVALIDATE)
683	*res = ent;	1030	const_eio (MS_SYNC)
684	strcpy (ent->d_name, e->d_name);
685	}
686	else
687	*res = 0;
688		1031
689	pthread_mutex_unlock (&readdirlock);	1032	const_eio (MT_MODIFY)
690		1033
691	errno = errorno;	1034	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
692	return e ? 0 : -1;	1035	const_eio (SYNC_FILE_RANGE_WRITE)
693	}	1036	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
694	#endif
695		1037
696	/* sendfile always needs emulation */	1038	const_eio (FALLOC_FL_KEEP_SIZE)
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	1039	const_eio (FALLOC_FL_PUNCH_HOLE)
698	{	1040	const_eio (FALLOC_FL_COLLAPSE_RANGE)
699	ssize_t res;	1041	const_eio (FALLOC_FL_ZERO_RANGE)
700		1042
701	if (!count)	1043	const_eio (READDIR_DENTS)
702	return 0;	1044	const_eio (READDIR_DIRS_FIRST)
		1045	const_eio (READDIR_STAT_ORDER)
		1046	const_eio (READDIR_FOUND_UNKNOWN)
703		1047
704	#if HAVE_SENDFILE	1048	const_eio (DT_UNKNOWN)
705	# if __linux	1049	const_eio (DT_FIFO)
706	res = sendfile (ofd, ifd, &offset, count);	1050	const_eio (DT_CHR)
707		1051	const_eio (DT_DIR)
708	# elif __freebsd	1052	const_eio (DT_BLK)
709	/*	1053	const_eio (DT_REG)
710	* Of course, the freebsd sendfile is a dire hack with no thoughts	1054	const_eio (DT_LNK)
711	* wasted on making it similar to other I/O functions.	1055	const_eio (DT_SOCK)
712	*/	1056	const_eio (DT_WHT)
713	{
714	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716
717	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
719	res = sbytes;
720	}	1057	};
721		1058
722	# elif __hpux	1059	aio_stash = gv_stashpv ("IO::AIO" , 1);
723	res = sendfile (ofd, ifd, offset, count, 0, 0);	1060	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1061	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1062	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
724		1063
725	# elif __solaris	1064	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
726	{	1065	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
727	struct sendfilevec vec;
728	size_t sbytes;
729		1066
730	vec.sfv_fd = ifd;	1067	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
731	vec.sfv_flag = 0;
732	vec.sfv_off = offset;
733	vec.sfv_len = count;
734		1068
735	res = sendfilev (ofd, &vec, 1, &sbytes);	1069	reinit ();
		1070	}
736		1071
737	if (res < 0 && sbytes)	1072	void
		1073	reinit ()
		1074	PROTOTYPE:
		1075
		1076	void
		1077	max_poll_reqs (unsigned int nreqs)
		1078	PROTOTYPE: $
		1079	CODE:
		1080	eio_set_max_poll_reqs (nreqs);
		1081
		1082	void
		1083	max_poll_time (double nseconds)
		1084	PROTOTYPE: $
		1085	CODE:
		1086	eio_set_max_poll_time (nseconds);
		1087
		1088	void
		1089	min_parallel (unsigned int nthreads)
		1090	PROTOTYPE: $
		1091	CODE:
		1092	eio_set_min_parallel (nthreads);
		1093
		1094	void
		1095	max_parallel (unsigned int nthreads)
		1096	PROTOTYPE: $
		1097	CODE:
		1098	eio_set_max_parallel (nthreads);
		1099
		1100	void
		1101	max_idle (unsigned int nthreads)
		1102	PROTOTYPE: $
		1103	CODE:
		1104	eio_set_max_idle (nthreads);
		1105
		1106	void
		1107	idle_timeout (unsigned int seconds)
		1108	PROTOTYPE: $
		1109	CODE:
		1110	eio_set_idle_timeout (seconds);
		1111
		1112	void
		1113	max_outstanding (unsigned int maxreqs)
		1114	PROTOTYPE: $
		1115	CODE:
		1116	max_outstanding = maxreqs;
		1117
		1118	void
		1119	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1120	PPCODE:
		1121	{
		1122	dREQ;
		1123
		1124	req->type = EIO_WD_OPEN;
		1125	req_set_path1 (req, pathname);
		1126
		1127	REQ_SEND;
		1128	}
		1129
		1130	void
		1131	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1132	PPCODE:
		1133	{
		1134	dREQ;
		1135
		1136	req->type = EIO_OPEN;
		1137	req_set_path1 (req, pathname);
		1138	req->int1 = flags;
		1139	req->int2 = mode;
		1140
		1141	REQ_SEND;
		1142	}
		1143
		1144	void
		1145	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1146	ALIAS:
		1147	aio_fsync = EIO_FSYNC
		1148	aio_fdatasync = EIO_FDATASYNC
		1149	aio_syncfs = EIO_SYNCFS
		1150	PPCODE:
		1151	{
		1152	int fd = s_fileno_croak (fh, 0);
		1153	dREQ;
		1154
		1155	req->type = ix;
		1156	req->sv1 = newSVsv (fh);
		1157	req->int1 = fd;
		1158
		1159	REQ_SEND;
		1160	}
		1161
		1162	void
		1163	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	int fd = s_fileno_croak (fh, 0);
		1167	dREQ;
		1168
		1169	req->type = EIO_SYNC_FILE_RANGE;
		1170	req->sv1 = newSVsv (fh);
		1171	req->int1 = fd;
		1172	req->offs = offset;
738	res = sbytes;	1173	req->size = nbytes;
739	}	1174	req->int2 = flags;
740		1175
741	# endif	1176	REQ_SEND;
		1177	}
		1178
		1179	void
		1180	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1181	PPCODE:
		1182	{
		1183	int fd = s_fileno_croak (fh, 0);
		1184	dREQ;
		1185
		1186	req->type = EIO_FALLOCATE;
		1187	req->sv1 = newSVsv (fh);
		1188	req->int1 = fd;
		1189	req->int2 = mode;
		1190	req->offs = offset;
		1191	req->size = len;
		1192
		1193	REQ_SEND;
		1194	}
		1195
		1196	void
		1197	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1198	PPCODE:
		1199	{
		1200	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1201	int fd = s_fileno_croak (fh, 0);
		1202	dREQ;
		1203
		1204	if (expect_false (close_fd < 0))
		1205	{
		1206	int pipefd [2];
		1207
		1208	if (
		1209	#ifdef _WIN32
		1210	_pipe (pipefd, 1, _O_BINARY) < 0
742	#else	1211	#else
743	res = -1;	1212	pipe (pipefd) < 0
744	errno = ENOSYS;	1213	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
745	#endif	1214	#endif
746		1215	|| close (pipefd [1]) < 0
747	if (res < 0
748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
749	#if __solaris
750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
751	#endif
752	)
753	)
754	{
755	/* emulate sendfile. this is a major pain in the ass */
756	dBUF;
757
758	res = 0;
759
760	while (count)
761	{
762	ssize_t cnt;
763
764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
765
766	if (cnt <= 0)
767	{	1216	)
768	if (cnt && !res) res = -1;	1217	abort (); /*D*/
769	break;
770	}
771		1218
772	cnt = write (ofd, aio_buf, cnt);	1219	close_fd = pipefd [0];
773
774	if (cnt <= 0)
775	{
776	if (cnt && !res) res = -1;
777	break;
778	}
779
780	offset += cnt;
781	res += cnt;
782	count -= cnt;
783	}
784
785	fBUF;
786	}
787
788	return res;
789	}
790
791	/* read a full directory */
792	static int scandir_ (const char *path, void **namesp)
793	{
794	DIR *dirp;
795	union
796	{
797	struct dirent d;
798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
799	} *u;
800	struct dirent *entp;
801	char *name, *names;
802	int memlen = 4096;
803	int memofs = 0;
804	int res = 0;
805	int errorno;
806
807	dirp = opendir (path);
808	if (!dirp)
809	return -1;
810
811	u = malloc (sizeof (*u));
812	names = malloc (memlen);
813
814	if (u && names)
815	for (;;)
816	{
817	errno = 0;
818	readdir_r (dirp, &u->d, &entp);
819
820	if (!entp)
821	break;
822
823	name = entp->d_name;
824
825	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
826	{
827	int len = strlen (name) + 1;
828
829	res++;
830
831	while (memofs + len > memlen)
832	{
833	memlen *= 2;
834	names = realloc (names, memlen);
835	if (!names)
836	break;
837	}
838
839	memcpy (names + memofs, name, len);
840	memofs += len;
841	}	1220	}
842	}
843		1221
844	errorno = errno;	1222	req->type = EIO_DUP2;
845	free (u);	1223	req->int1 = close_fd;
846	closedir (dirp);	1224	req->sv2 = newSVsv (fh);
		1225	req->int2 = fd;
847		1226
848	if (errorno)	1227	REQ_SEND;
849	{
850	free (names);
851	errno = errorno;
852	res = -1;
853	}
854
855	*namesp = (void *)names;
856	return res;
857	}	1228	}
858		1229
859	/*****************************************************************************/
860
861	static void *aio_proc (void *thr_arg)
862	{
863	aio_req req;
864	int type;
865
866	do
867	{
868	pthread_mutex_lock (&reqlock);
869
870	for (;;)
871	{
872	req = reqq_shift (&req_queue);
873
874	if (req)
875	break;
876
877	pthread_cond_wait (&reqwait, &reqlock);
878	}
879
880	pthread_mutex_unlock (&reqlock);
881
882	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884
885	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)
887	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
890
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
893
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
897
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
905
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
909
910	case REQ_SLEEP:
911	{
912	struct timeval tv;
913
914	tv.tv_sec = req->fd;
915	tv.tv_usec = req->fd2;
916
917	req->result = select (0, 0, 0, 0, &tv);
918	}
919
920	case REQ_GROUP:
921	case REQ_NOP:
922	case REQ_QUIT:
923	break;
924
925	default:
926	req->result = ENOSYS;
927	break;
928	}
929
930	req->errorno = errno;
931
932	pthread_mutex_lock (&reslock);
933
934	if (!reqq_push (&res_queue, req))
935	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);
937
938	pthread_mutex_unlock (&reslock);
939	}
940	while (type != REQ_QUIT);
941
942	return 0;
943	}
944
945	/*****************************************************************************/
946
947	static void atfork_prepare (void)
948	{
949	pthread_mutex_lock (&reqlock);
950	pthread_mutex_lock (&reslock);
951	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);
953	#endif
954	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);
956	#endif
957	}
958
959	static void atfork_parent (void)
960	{
961	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);
963	#endif
964	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);
966	#endif
967	pthread_mutex_unlock (&reslock);
968	pthread_mutex_unlock (&reqlock);
969	}
970
971	static void atfork_child (void)
972	{
973	aio_req prv;
974
975	started = 0;
976
977	while (prv = reqq_shift (&req_queue))
978	req_free (prv);
979
980	while (prv = reqq_shift (&res_queue))
981	req_free (prv);
982
983	close (respipe [0]);
984	close (respipe [1]);
985	create_pipe ();
986
987	atfork_parent ();
988	}
989
990	#define dREQ \
991	aio_req req; \
992	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \
994	\
995	if (SvOK (callback) && !SvROK (callback)) \
996	croak ("callback must be undef or of reference type"); \
997	\
998	Newz (0, req, 1, aio_cb); \
999	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \
1001	\
1002	req->callback = newSVsv (callback); \
1003	req->pri = req_pri
1004
1005	#define REQ_SEND \
1006	req_send (req); \
1007	\
1008	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1010
1011	MODULE = IO::AIO PACKAGE = IO::AIO
1012
1013	PROTOTYPES: ENABLE
1014
1015	BOOT:
1016	{
1017	HV *stash = gv_stashpv ("IO::AIO", 1);
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1021
1022	create_pipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025
1026	void	1230	void
1027	min_parallel (nthreads)	1231	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1028	int nthreads
1029	PROTOTYPE: $
1030
1031	void
1032	max_parallel (nthreads)
1033	int nthreads
1034	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	1232	PPCODE:
1041	RETVAL = max_outstanding;
1042	max_outstanding = nreqs;
1043
1044	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1046	SV * pathname
1047	int flags
1048	int mode
1049	SV * callback
1050	PROTOTYPE: $$$;$
1051	PPCODE:
1052	{	1233	{
		1234	int fd = s_fileno_croak (fh, 0);
1053	dREQ;	1235	dREQ;
1054		1236
1055	req->type = REQ_OPEN;	1237	req->type = EIO_SEEK;
1056	req->data = newSVsv (pathname);	1238	req->sv1 = newSVsv (fh);
1057	req->dataptr = SvPVbyte_nolen (req->data);	1239	req->int1 = fd;
1058	req->fd = flags;	1240	req->offs = SvVAL64 (offset);
1059	req->mode = mode;	1241	req->int2 = whence;
1060		1242
1061	REQ_SEND;	1243	REQ_SEND;
1062	}	1244	}
1063		1245
1064	void	1246	void
1065	aio_close (fh,callback=&PL_sv_undef)	1247	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$
1069	ALIAS:	1248	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC
1073	PPCODE:
1074	{
1075	dREQ;
1076
1077	req->type = ix;
1078	req->fh = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1080
1081	REQ_SEND (req);
1082	}
1083
1084	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1086	SV * fh
1087	UV offset
1088	UV length
1089	SV * data
1090	UV dataoffset
1091	SV * callback
1092	ALIAS:
1093	aio_read = REQ_READ	1249	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	1250	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:	1251	PPCODE:
1097	{	1252	{
1098	aio_req req;
1099	STRLEN svlen;	1253	STRLEN svlen;
		1254	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1100	char *svptr = SvPVbyte (data, svlen);	1255	char *svptr = SvPVbyte (data, svlen);
1101		1256	UV len = SvUV (length);
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104		1257
1105	if (dataoffset < 0)	1258	if (dataoffset < 0)
1106	dataoffset += svlen;	1259	dataoffset += svlen;
1107		1260
1108	if (dataoffset < 0 || dataoffset > svlen)	1261	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	1262	croak ("dataoffset outside of data scalar");
1110		1263
1111	if (ix == REQ_WRITE)	1264	if (ix == EIO_WRITE)
1112	{	1265	{
1113	/* write: check length and adjust. */	1266	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	1267	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	1268	len = svlen - dataoffset;
1116	}	1269	}
1117	else	1270	else
1118	{	1271	{
1119	/* read: grow scalar as necessary */	1272	/* read: check type and grow scalar as necessary */
		1273	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1120	svptr = SvGROW (data, length + dataoffset);	1274	svptr = sv_grow (data, len + dataoffset + 1);
		1275	else if (SvCUR (data) < len + dataoffset)
		1276	croak ("length + dataoffset outside of scalar, and cannot grow");
1121	}	1277	}
1122
1123	if (length < 0)
1124	croak ("length must not be negative");
1125		1278
1126	{	1279	{
1127	dREQ;	1280	dREQ;
1128		1281
1129	req->type = ix;	1282	req->type = ix;
1130	req->fh = newSVsv (fh);	1283	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1284	req->int1 = fd;
1132	: IoOFP (sv_2io (fh)));	1285	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	1286	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	1287	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	1288	req->ptr2 = (char *)svptr + dataoffset;
		1289	req->stroffset = dataoffset;
1137		1290
1138	if (!SvREADONLY (data))	1291	if (!SvREADONLY (data))
1139	{	1292	{
1140	SvREADONLY_on (data);	1293	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	1294	req->flags |= FLAG_SV2_RO_OFF;
1142	}	1295	}
1143		1296
1144	REQ_SEND;	1297	REQ_SEND;
1145	}	1298	}
1146	}	1299	}
1147		1300
1148	void	1301	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1302	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1150	SV * out_fh	1303	ALIAS:
1151	SV * in_fh	1304	aio_readlink = EIO_READLINK
1152	UV in_offset	1305	aio_realpath = EIO_REALPATH
1153	UV length
1154	SV * callback
1155	PROTOTYPE: $$$$;$
1156	PPCODE:	1306	PPCODE:
1157	{	1307	{
		1308	dREQ;
		1309
		1310	req->type = ix;
		1311	req_set_path1 (req, pathname);
		1312
		1313	REQ_SEND;
		1314	}
		1315
		1316	void
		1317	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1318	PPCODE:
		1319	{
		1320	int ifd = s_fileno_croak (in_fh , 0);
		1321	int ofd = s_fileno_croak (out_fh, 1);
1158	dREQ;	1322	dREQ;
1159		1323
1160	req->type = REQ_SENDFILE;	1324	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	1325	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1326	req->int1 = ofd;
1163	req->fh2 = newSVsv (in_fh);	1327	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1328	req->int2 = ifd;
1165	req->offset = in_offset;	1329	req->offs = in_offset;
1166	req->length = length;	1330	req->size = length;
1167		1331
1168	REQ_SEND;	1332	REQ_SEND;
1169	}	1333	}
1170		1334
1171	void	1335	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1336	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$
1178	PPCODE:	1337	PPCODE:
1179	{	1338	{
		1339	int fd = s_fileno_croak (fh, 0);
1180	dREQ;	1340	dREQ;
1181		1341
1182	req->type = REQ_READAHEAD;	1342	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	1343	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1344	req->int1 = fd;
1185	req->offset = offset;	1345	req->offs = offset;
1186	req->length = length;	1346	req->size = length;
1187		1347
1188	REQ_SEND;	1348	REQ_SEND;
1189	}	1349	}
1190		1350
1191	void	1351	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	1352	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	1353	ALIAS:
1196	aio_stat = REQ_STAT	1354	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	1355	aio_lstat = EIO_LSTAT
		1356	aio_statvfs = EIO_STATVFS
1198	PPCODE:	1357	PPCODE:
1199	{	1358	{
1200	dREQ;	1359	dREQ;
1201		1360
1202	New (0, req->statdata, 1, Stat_t);	1361	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1203	if (!req->statdata)
1204	{
1205	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");
1207	}
1208
1209	if (SvPOK (fh_or_path))
1210	{
1211	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);
1214	}
1215	else
1216	{
1217	req->type = REQ_FSTAT;
1218	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}
1221		1362
1222	REQ_SEND;	1363	REQ_SEND;
1223	}	1364	}
1224		1365
		1366	UV
		1367	major (UV dev)
		1368	ALIAS:
		1369	minor = 1
		1370	CODE:
		1371	RETVAL = ix ? major (dev) : minor (dev);
		1372	OUTPUT:
		1373	RETVAL
		1374
		1375	UV
		1376	makedev (UV maj, UV min)
		1377	CODE:
		1378	RETVAL = makedev (maj, min);
		1379	OUTPUT:
		1380	RETVAL
		1381
1225	void	1382	void
		1383	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1384	PPCODE:
		1385	{
		1386	dREQ;
		1387
		1388	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1389	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1390	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1391
		1392	REQ_SEND;
		1393	}
		1394
		1395	void
		1396	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1397	PPCODE:
		1398	{
		1399	dREQ;
		1400
		1401	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1402	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1403
		1404	REQ_SEND;
		1405	}
		1406
		1407	void
		1408	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1409	PPCODE:
		1410	{
		1411	dREQ;
		1412
		1413	req->int2 = mode;
		1414	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1415
		1416	REQ_SEND;
		1417	}
		1418
		1419	void
		1420	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1421	PPCODE:
		1422	{
		1423	dREQ;
		1424
		1425	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1426	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1427	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1428
		1429	REQ_SEND;
		1430	}
		1431
		1432	void
		1433	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1434	PPCODE:
		1435	{
		1436	dREQ;
		1437
		1438	req->type = EIO_READDIR;
		1439	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1440
		1441	if (flags & EIO_READDIR_DENTS)
		1442	req->int1 |= EIO_READDIR_CUSTOM2;
		1443
		1444	req_set_path1 (req, pathname);
		1445
		1446	REQ_SEND;
		1447	}
		1448
		1449	void
		1450	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1451	PPCODE:
		1452	{
		1453	dREQ;
		1454
		1455	req->type = EIO_MKDIR;
		1456	req->int2 = mode;
		1457	req_set_path1 (req, pathname);
		1458
		1459	REQ_SEND;
		1460	}
		1461
		1462	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	1463	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	1464	ALIAS:
1230	aio_unlink = REQ_UNLINK	1465	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	1466	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	1467	aio_readdir = EIO_READDIR
1233	PPCODE:	1468	PPCODE:
1234	{	1469	{
1235	dREQ;	1470	dREQ;
1236		1471
1237	req->type = ix;	1472	req->type = ix;
1238	req->data = newSVsv (pathname);	1473	req_set_path1 (req, pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	1474
1240
1241	REQ_SEND;	1475	REQ_SEND;
1242	}	1476	}
1243		1477
1244	void	1478	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1479	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1246	SV * oldpath
1247	SV * newpath
1248	SV * callback
1249	ALIAS:	1480	ALIAS:
1250	aio_link = REQ_LINK	1481	aio_link = EIO_LINK
1251	aio_symlink = REQ_SYMLINK	1482	aio_symlink = EIO_SYMLINK
1252	aio_rename = REQ_RENAME	1483	aio_rename = EIO_RENAME
1253	PPCODE:	1484	PPCODE:
1254	{	1485	{
		1486	eio_wd wd2 = 0;
1255	dREQ;	1487	dREQ;
1256		1488
1257	req->type = ix;	1489	req->type = ix;
1258	req->fh = newSVsv (oldpath);	1490	req_set_path1 (req, oldpath);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	1491	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1260	req->data = newSVsv (newpath);	1492	req->int3 = (long)wd2;
1261	req->dataptr = SvPVbyte_nolen (req->data);
1262		1493
1263	REQ_SEND;	1494	REQ_SEND;
1264	}	1495	}
1265		1496
1266	void	1497	void
1267	aio_sleep (delay,callback=&PL_sv_undef)	1498	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	1499	PPCODE:
1271	{	1500	{
1272	dREQ;	1501	dREQ;
1273		1502
1274	req->type = REQ_SLEEP;	1503	req->type = EIO_MKNOD;
1275	req->fd = delay < 0. ? 0 : delay;	1504	req->int2 = (mode_t)mode;
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1505	req->offs = dev;
1277		1506	req_set_path1 (req, pathname);
		1507
1278	REQ_SEND;	1508	REQ_SEND;
1279	}	1509	}
1280		1510
1281	void	1511	void
1282	aio_group (callback=&PL_sv_undef)	1512	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback = &PL_sv_undef)
1283	SV * callback	1513	ALIAS:
1284	PROTOTYPE: ;$	1514	aio_mtouch = EIO_MTOUCH
		1515	aio_msync = EIO_MSYNC
1285	PPCODE:	1516	PPCODE:
1286	{	1517	{
		1518	STRLEN svlen;
		1519	char *svptr = SvPVbyte (data, svlen);
		1520	UV len = SvUV (length);
		1521
		1522	if (offset < 0)
		1523	offset += svlen;
		1524
		1525	if (offset < 0 || offset > svlen)
		1526	croak ("offset outside of scalar");
		1527
		1528	if (!SvOK (length) || len + offset > svlen)
		1529	len = svlen - offset;
		1530
		1531	{
		1532	dREQ;
		1533
		1534	req->type = ix;
		1535	req->sv2 = SvREFCNT_inc (data);
		1536	req->ptr2 = (char *)svptr + offset;
		1537	req->size = len;
		1538	req->int1 = flags;
		1539
		1540	REQ_SEND;
		1541	}
		1542	}
		1543
		1544	void
		1545	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1546	PPCODE:
		1547	{
		1548	STRLEN svlen;
		1549	char *svptr = SvPVbyte (data, svlen);
		1550	UV len = SvUV (length);
		1551
		1552	if (offset < 0)
		1553	offset += svlen;
		1554
		1555	if (offset < 0 || offset > svlen)
		1556	croak ("offset outside of scalar");
		1557
		1558	if (!SvOK (length) || len + offset > svlen)
		1559	len = svlen - offset;
		1560
		1561	{
		1562	dREQ;
		1563
		1564	req->type = EIO_MLOCK;
		1565	req->sv2 = SvREFCNT_inc (data);
		1566	req->ptr2 = (char *)svptr + offset;
		1567	req->size = len;
		1568
		1569	REQ_SEND;
		1570	}
		1571	}
		1572
		1573	void
		1574	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1575	PPCODE:
		1576	{
		1577	dREQ;
		1578
		1579	req->type = EIO_MLOCKALL;
		1580	req->int1 = flags;
		1581
		1582	REQ_SEND;
		1583	}
		1584
		1585	void
		1586	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1587	PPCODE:
		1588	{
		1589	int fd = s_fileno_croak (fh, 0);
1287	dREQ;	1590	dREQ;
1288		1591
1289	req->type = REQ_GROUP;	1592	req->type = EIO_CUSTOM;
1290	req_send (req);	1593	req->sv1 = newSVsv (fh);
		1594	req->int1 = fd;
1291		1595
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1596	req->feed = fiemap;
1293	}	1597	#if HAVE_FIEMAP
		1598	/* keep our fingers crossed that the next two types are 64 bit */
		1599	req->offs = start;
		1600	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1601	req->int2 = flags;
		1602	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1603	#endif
1294		1604
		1605	REQ_SEND;
		1606	}
		1607
1295	void	1608	void
1296	aio_nop (callback=&PL_sv_undef)	1609	aio_busy (double delay, SV *callback = &PL_sv_undef)
1297	SV * callback
1298	PPCODE:	1610	PPCODE:
1299	{	1611	{
1300	dREQ;	1612	dREQ;
1301		1613
1302	req->type = REQ_NOP;	1614	req->type = EIO_BUSY;
		1615	req->nv1 = delay < 0. ? 0. : delay;
1303		1616
1304	REQ_SEND;	1617	REQ_SEND;
1305	}	1618	}
1306		1619
1307	void	1620	void
		1621	aio_group (SV *callback = &PL_sv_undef)
		1622	PPCODE:
		1623	{
		1624	dREQ;
		1625
		1626	req->type = EIO_GROUP;
		1627
		1628	PUTBACK;
		1629	req_submit (req);
		1630	SPAGAIN;
		1631
		1632	XPUSHs (req_sv (req, aio_grp_stash));
		1633	}
		1634
		1635	void
		1636	aio_nop (SV *callback = &PL_sv_undef)
		1637	ALIAS:
		1638	aio_nop = EIO_NOP
		1639	aio_sync = EIO_SYNC
		1640	PPCODE:
		1641	{
		1642	dREQ;
		1643
		1644	req->type = ix;
		1645
		1646	REQ_SEND;
		1647	}
		1648
		1649	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1650	aioreq_pri (int pri = NO_INIT)
1309	CODE:	1651	CODE:
		1652	RETVAL = next_pri;
		1653	if (items > 0)
		1654	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1655	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1656	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1657	next_pri = pri;
		1658	}
		1659	OUTPUT:
		1660	RETVAL
		1661
		1662	void
		1663	aioreq_nice (int nice = 0)
		1664	CODE:
		1665	nice = next_pri - nice;
		1666	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1667	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1668	next_pri = nice;
1313		1669
1314	void	1670	void
1315	flush ()	1671	flush ()
1316	PROTOTYPE:
1317	CODE:	1672	CODE:
1318	while (nreqs)	1673	while (eio_nreqs ())
1319	{	1674	{
1320	poll_wait ();	1675	poll_wait ();
1321	poll_cb ();	1676	poll_cb ();
1322	}	1677	}
1323		1678
1324	void	1679	int
1325	poll()	1680	poll ()
1326	PROTOTYPE:
1327	CODE:	1681	CODE:
1328	if (nreqs)
1329	{
1330	poll_wait ();	1682	poll_wait ();
1331	poll_cb ();	1683	RETVAL = poll_cb ();
1332	}
1333
1334	int
1335	poll_fileno()
1336	PROTOTYPE:
1337	CODE:
1338	RETVAL = respipe [0];
1339	OUTPUT:	1684	OUTPUT:
1340	RETVAL	1685	RETVAL
1341		1686
1342	int	1687	int
		1688	poll_fileno ()
		1689	CODE:
		1690	RETVAL = s_epipe_fd (&respipe);
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
1343	poll_cb(...)	1695	poll_cb (...)
1344	PROTOTYPE:	1696	PROTOTYPE:
1345	CODE:	1697	CODE:
1346	RETVAL = poll_cb ();	1698	RETVAL = poll_cb ();
1347	OUTPUT:	1699	OUTPUT:
1348	RETVAL	1700	RETVAL
1349		1701
1350	void	1702	void
1351	poll_wait()	1703	poll_wait ()
1352	PROTOTYPE:
1353	CODE:	1704	CODE:
1354	if (nreqs)
1355	poll_wait ();	1705	poll_wait ();
1356		1706
1357	int	1707	int
1358	nreqs()	1708	nreqs ()
1359	PROTOTYPE:
1360	CODE:	1709	CODE:
1361	RETVAL = nreqs;	1710	RETVAL = eio_nreqs ();
1362	OUTPUT:	1711	OUTPUT:
1363	RETVAL	1712	RETVAL
1364		1713
		1714	int
		1715	nready ()
		1716	CODE:
		1717	RETVAL = eio_nready ();
		1718	OUTPUT:
		1719	RETVAL
		1720
		1721	int
		1722	npending ()
		1723	CODE:
		1724	RETVAL = eio_npending ();
		1725	OUTPUT:
		1726	RETVAL
		1727
		1728	int
		1729	nthreads ()
		1730	CODE:
		1731	RETVAL = eio_nthreads ();
		1732	OUTPUT:
		1733	RETVAL
		1734
		1735	int
		1736	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1737	CODE:
		1738	RETVAL = posix_fadvise (fh, offset, length, advice);
		1739	OUTPUT:
		1740	RETVAL
		1741
		1742	IV
		1743	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1744	CODE:
		1745	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1746	OUTPUT:
		1747	RETVAL
		1748
		1749	void
		1750	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1751	PPCODE:
		1752	sv_unmagic (scalar, MMAP_MAGIC);
		1753	{
		1754	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1755	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1756	if (addr == (void *)-1)
		1757	XSRETURN_NO;
		1758
		1759	sv_force_normal (scalar);
		1760
		1761	/* we store the length in mg_obj, as namlen is I32 :/ */
		1762	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1763	->mg_obj = (SV *)length;
		1764
		1765	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1766
		1767	if (!(prot & PROT_WRITE))
		1768	SvREADONLY_on (scalar);
		1769
		1770	if (SvLEN (scalar))
		1771	Safefree (SvPVX (scalar));
		1772
		1773	SvPVX (scalar) = (char *)addr;
		1774	SvCUR_set (scalar, length);
		1775	SvLEN_set (scalar, 0);
		1776	SvPOK_only (scalar);
		1777
		1778	XSRETURN_YES;
		1779	}
		1780
		1781	void
		1782	munmap (SV *scalar)
		1783	CODE:
		1784	sv_unmagic (scalar, MMAP_MAGIC);
		1785
		1786	int
		1787	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1788	ALIAS:
		1789	mprotect = 1
		1790	CODE:
		1791	{
		1792	STRLEN svlen;
		1793	void *addr = SvPVbyte (scalar, svlen);
		1794	STRLEN len = SvUV (length);
		1795
		1796	if (offset < 0)
		1797	offset += svlen;
		1798
		1799	if (offset < 0 || offset > svlen)
		1800	croak ("offset outside of scalar");
		1801
		1802	if (!SvOK (length) || len + offset > svlen)
		1803	len = svlen - offset;
		1804
		1805	addr = (void *)(((intptr_t)addr) + offset);
		1806	eio_page_align (&addr, &len);
		1807
		1808	switch (ix)
		1809	{
		1810	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1811	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1812	}
		1813	}
		1814	OUTPUT:
		1815	RETVAL
		1816
		1817	int
		1818	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1819	CODE:
		1820	{
		1821	STRLEN svlen;
		1822	void *addr = SvPVbyte (scalar, svlen);
		1823	size_t len = SvUV (length);
		1824
		1825	if (offset < 0)
		1826	offset += svlen;
		1827
		1828	if (offset < 0 || offset > svlen)
		1829	croak ("offset outside of scalar");
		1830
		1831	if (!SvOK (length) || len + offset > svlen)
		1832	len = svlen - offset;
		1833
		1834	addr = (void *)(((intptr_t)addr) + offset);
		1835	eio_page_align (&addr, &len);
		1836	#if _POSIX_MEMLOCK_RANGE
		1837	RETVAL = munlock (addr, len);
		1838	#else
		1839	RETVAL = EIO_ENOSYS ();
		1840	#endif
		1841	}
		1842	OUTPUT:
		1843	RETVAL
		1844
		1845	int
		1846	munlockall ()
		1847	CODE:
		1848	#if _POSIX_MEMLOCK
		1849	munlockall ();
		1850	#else
		1851	RETVAL = EIO_ENOSYS ();
		1852	#endif
		1853	OUTPUT:
		1854	RETVAL
		1855
		1856	int
		1857	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1858	CODE:
		1859	{
		1860	#if HAVE_LINUX_SPLICE
		1861	loff_t off_in_, off_out_;
		1862	RETVAL = splice (
		1863	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1864	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1865	length, flags
		1866	);
		1867	#else
		1868	RETVAL = EIO_ENOSYS ();
		1869	#endif
		1870	}
		1871	OUTPUT:
		1872	RETVAL
		1873
		1874	int
		1875	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1876	CODE:
		1877	#if HAVE_LINUX_SPLICE
		1878	RETVAL = tee (rfh, wfh, length, flags);
		1879	#else
		1880	RETVAL = EIO_ENOSYS ();
		1881	#endif
		1882	OUTPUT:
		1883	RETVAL
		1884
		1885	int
		1886	pipesize (aio_rfd rfh, int new_size = -1)
		1887	PROTOTYPE: $;$
		1888	CODE:
		1889	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1890	if (new_size >= 0)
		1891	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1892	else
		1893	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1894	#else
		1895	errno = ENOSYS;
		1896	RETVAL = -1;
		1897	#endif
		1898	OUTPUT:
		1899	RETVAL
		1900
		1901	void
		1902	pipe2 (int flags = 0)
		1903	PROTOTYPE: ;$
		1904	PPCODE:
		1905	{
		1906	int fd[2];
		1907	int res;
		1908
		1909	if (flags)
		1910	#if HAVE_PIPE2
		1911	res = pipe2 (fd, flags);
		1912	#else
		1913	res = (errno = ENOSYS, -1);
		1914	#endif
		1915	else
		1916	res = pipe (fd);
		1917
		1918	if (!res)
		1919	{
		1920	EXTEND (SP, 2);
		1921	PUSHs (newmortalFH (fd[0], O_RDONLY));
		1922	PUSHs (newmortalFH (fd[1], O_WRONLY));
		1923	}
		1924	}
		1925
		1926	void _on_next_submit (SV *cb)
		1927	CODE:
		1928	SvREFCNT_dec (on_next_submit);
		1929	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1930
1365	PROTOTYPES: DISABLE	1931	PROTOTYPES: DISABLE
		1932
		1933	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1934
		1935	BOOT:
		1936	{
		1937	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1938	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1939	}
		1940
		1941	void
		1942	DESTROY (SV *self)
		1943	CODE:
		1944	{
		1945	aio_wd wd = SvAIO_WD (self);
		1946	#if HAVE_AT
		1947	{
		1948	SV *callback = &PL_sv_undef;
		1949	dREQ; /* clobbers next_pri :/ */
		1950	next_pri = req->pri; /* restore next_pri */
		1951	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1952	req->type = EIO_WD_CLOSE;
		1953	req->wd = wd;
		1954	REQ_SEND;
		1955	}
		1956	#else
		1957	eio_wd_close_sync (wd);
		1958	#endif
		1959	}
1366		1960
1367	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1961	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1368		1962
1369	void	1963	void
1370	cancel (aio_req_ornot req)	1964	cancel (aio_req_ornot req)
1371	CODE:	1965	CODE:
1372	req_cancel (req);	1966	eio_cancel (req);
1373		1967
1374	void	1968	void
1375	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1969	cb (aio_req_ornot req, SV *callback = NO_INIT)
1376	CODE:	1970	PPCODE:
		1971	{
		1972	if (GIMME_V != G_VOID)
		1973	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1974
		1975	if (items > 1)
		1976	{
		1977	SV *cb_cv = get_cb (callback);
		1978
1377	SvREFCNT_dec (req->callback);	1979	SvREFCNT_dec (req->callback);
1378	req->callback = newSVsv (callback);	1980	req->callback = SvREFCNT_inc (cb_cv);
		1981	}
		1982	}
1379		1983
1380	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1984	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1381		1985
1382	void	1986	void
1383	add (aio_req grp, ...)	1987	add (aio_req grp, ...)
1384	PPCODE:	1988	PPCODE:
1385	{	1989	{
1386	int i;	1990	int i;
1387	aio_req req;
1388		1991
1389	if (grp->fd == 2)	1992	if (grp->int1 == 2)
1390	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1993	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1391		1994
1392	for (i = 1; i < items; ++i )	1995	for (i = 1; i < items; ++i )
1393	{	1996	{
		1997	aio_req req;
		1998
1394	if (GIMME_V != G_VOID)	1999	if (GIMME_V != G_VOID)
1395	XPUSHs (sv_2mortal (newSVsv (ST (i))));	2000	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1396		2001
1397	req = SvAIO_REQ (ST (i));	2002	req = SvAIO_REQ (ST (i));
1398		2003
1399	if (req)	2004	if (req)
1400	{	2005	eio_grp_add (grp, req);
1401	++grp->length;
1402	req->grp = grp;
1403
1404	req->grp_prev = 0;
1405	req->grp_next = grp->grp_first;
1406
1407	if (grp->grp_first)
1408	grp->grp_first->grp_prev = req;
1409
1410	grp->grp_first = req;
1411	}
1412	}	2006	}
1413	}	2007	}
		2008
		2009	void
		2010	cancel_subs (aio_req_ornot req)
		2011	CODE:
		2012	req_cancel_subs (req);
1414		2013
1415	void	2014	void
1416	result (aio_req grp, ...)	2015	result (aio_req grp, ...)
1417	CODE:	2016	CODE:
1418	{	2017	{
1419	int i;	2018	int i;
		2019	AV *av;
		2020
		2021	grp->errorno = errno;
		2022
1420	AV *av = newAV ();	2023	av = newAV ();
		2024	av_extend (av, items - 1);
1421		2025
1422	for (i = 1; i < items; ++i )	2026	for (i = 1; i < items; ++i )
1423	av_push (av, newSVsv (ST (i)));	2027	av_push (av, newSVsv (ST (i)));
1424		2028
1425	SvREFCNT_dec (grp->data);	2029	SvREFCNT_dec (grp->sv1);
1426	grp->data = (SV *)av;	2030	grp->sv1 = (SV *)av;
1427	}	2031	}
		2032
		2033	void
		2034	errno (aio_req grp, int errorno = errno)
		2035	CODE:
		2036	grp->errorno = errorno;
1428		2037
1429	void	2038	void
1430	limit (aio_req grp, int limit)	2039	limit (aio_req grp, int limit)
1431	CODE:	2040	CODE:
1432	grp->fd2 = limit;	2041	eio_grp_limit (grp, limit);
1433	aio_grp_feed (grp);
1434		2042
1435	void	2043	void
1436	feed (aio_req grp, SV *callback=&PL_sv_undef)	2044	feed (aio_req grp, SV *callback = &PL_sv_undef)
1437	CODE:	2045	CODE:
1438	{	2046	{
1439	SvREFCNT_dec (grp->fh2);	2047	SvREFCNT_dec (grp->sv2);
1440	grp->fh2 = newSVsv (callback);	2048	grp->sv2 = newSVsv (callback);
		2049	grp->feed = aio_grp_feed;
1441		2050
1442	if (grp->fd2 <= 0)	2051	if (grp->int2 <= 0)
1443	grp->fd2 = 2;	2052	grp->int2 = 2;
1444		2053
1445	aio_grp_feed (grp);	2054	eio_grp_limit (grp, grp->int2);
1446	}	2055	}
1447		2056

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