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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC vs.
Revision 1.218 by root, Fri Jul 27 17:54:40 2012 UTC

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

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