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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC vs.
Revision 1.219 by root, Fri Jul 27 18:43:25 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 < count)
		200	/* either autosizing succeeded,
		201	* or the file had no extents
		202	* or we luckily had enough space */
		203	break;
		204
		205	/* some kernels overwrite fm_length, so just reset everything */
		206	fiemap->fm_start = req->offs;
		207	fiemap->fm_length = req->size;
		208	fiemap->fm_flags = req->int2;
		209	fiemap->fm_extent_count = 0;
		210
		211	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		212	return;
		213
		214	/* to work around a kernel bug, we allocate one more */
		215	count = fiemap->fm_mapped_extents + 1;
		216
		217	free (fiemap);
		218	}
		219
		220	req->result = 0;
		221
56	#else	222	#else
57	# define STACKSIZE 16384	223	errno = ENOSYS;
58	#endif	224	#endif
		225	}
59		226
60	/* buffer size for various temporary buffers */	227	/*****************************************************************************/
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		228
71	enum {	229	enum {
72	REQ_QUIT,	230	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	};	231	};
84		232
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;	233	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	234	typedef eio_req *aio_req_ornot;
		235	typedef eio_wd aio_wd;
119		236
120	enum {	237	static SV *on_next_submit;
121	PRI_MIN = -4,	238	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;	239	static int max_outstanding;
134	static int respipe [2];
135		240
136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	241	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		242
142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))	243	static void req_destroy (aio_req req);
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_cancel (aio_req req);
244	static void req_free (aio_req req);	245
		246	static void
		247	want_poll (void)
		248	{
		249	/* write a dummy byte to the pipe so fh becomes ready */
		250	s_epipe_signal (&respipe);
		251	}
		252
		253	static void
		254	done_poll (void)
		255	{
		256	/* read any signals sent by the worker threads */
		257	s_epipe_drain (&respipe);
		258	}
245		259
246	/* must be called at most once */	260	/* must be called at most once */
247	static SV *req_sv (aio_req req, const char *klass)	261	static SV *
		262	req_sv (aio_req req, HV *stash)
248	{	263	{
249	if (!req->self)	264	if (!req->self)
250	{	265	{
251	req->self = (SV *)newHV ();	266	req->self = (SV *)newHV ();
252	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	267	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
253	}	268	}
254		269
255	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	270	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
256	}	271	}
257		272
258	static aio_req SvAIO_REQ (SV *sv)	273	static SV *
		274	newSVaio_wd (aio_wd wd)
		275	{
		276	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		277	}
		278
		279	static aio_req
		280	SvAIO_REQ (SV *sv)
259	{	281	{
260	MAGIC *mg;	282	MAGIC *mg;
261		283
262	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	284	if (!SvROK (sv)
		285	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		286	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		287	&& SvSTASH (SvRV (sv)) != aio_req_stash
		288	&& !sv_derived_from (sv, "IO::AIO::REQ")))
263	croak ("object of class " AIO_REQ_KLASS " expected");	289	croak ("object of class IO::AIO::REQ expected");
264		290
265	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	291	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
266		292
267	return mg ? (aio_req)mg->mg_ptr : 0;	293	return mg ? (aio_req)mg->mg_ptr : 0;
268	}	294	}
269		295
		296	static aio_wd
		297	SvAIO_WD (SV *sv)
		298	{
		299	if (!SvROK (sv)
		300	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		301	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		302	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		303
		304	return (aio_wd)(long)SvIVX (SvRV (sv));
		305	}
		306
		307	static void
270	static void aio_grp_feed (aio_req grp)	308	aio_grp_feed (aio_req grp)
271	{	309	{
272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	310	if (grp->sv2 && SvOK (grp->sv2))
273	{	311	{
274	int old_len = grp->length;
275
276	if (grp->fh2 && SvOK (grp->fh2))
277	{
278	dSP;	312	dSP;
279		313
280	ENTER;	314	ENTER;
281	SAVETMPS;	315	SAVETMPS;
282	PUSHMARK (SP);	316	PUSHMARK (SP);
283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	317	XPUSHs (req_sv (grp, aio_grp_stash));
284	PUTBACK;	318	PUTBACK;
285	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	319	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
286	SPAGAIN;	320	SPAGAIN;
287	FREETMPS;	321	FREETMPS;
288	LEAVE;	322	LEAVE;
289	}
290
291	/* stop if no progress has been made */
292	if (old_len == grp->length)
293	{
294	SvREFCNT_dec (grp->fh2);
295	grp->fh2 = 0;
296	break;
297	}
298	}	323	}
299	}	324	}
300		325
301	static void aio_grp_dec (aio_req grp)	326	static void
		327	req_submit (eio_req *req)
302	{	328	{
303	--grp->length;	329	eio_submit (req);
304		330
305	/* call feeder, if applicable */	331	if (expect_false (on_next_submit))
306	aio_grp_feed (grp);
307
308	/* finish, if done */
309	if (!grp->length && grp->fd)
310	{	332	{
311	req_invoke (grp);	333	dSP;
312	req_free (grp);	334	SV *cb = sv_2mortal (on_next_submit);
		335
		336	on_next_submit = 0;
		337
		338	PUSHMARK (SP);
		339	PUTBACK;
		340	call_sv (cb, G_DISCARD | G_EVAL);
313	}	341	}
314	}	342	}
315		343
316	static void poll_wait ()	344	static int
		345	req_invoke (eio_req *req)
317	{	346	{
318	fd_set rfd;	347	if (req->flags & FLAG_SV2_RO_OFF)
		348	SvREADONLY_off (req->sv2);
319		349
320	while (nreqs)	350	if (!EIO_CANCELLED (req) && req->callback)
321	{	351	{
322	int size;
323	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324	LOCK (reslock);
325	#endif
326	size = res_queue.size;
327	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328	UNLOCK (reslock);
329	#endif
330
331	if (size)
332	return;
333
334	FD_ZERO(&rfd);
335	FD_SET(respipe [0], &rfd);
336
337	select (respipe [0] + 1, &rfd, 0, 0, 0);
338	}
339	}
340
341	static void req_invoke (aio_req req)
342	{
343	dSP;	352	dSP;
344		353	static SV *sv_result_cache; /* caches the result integer SV */
345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	354	SV *sv_result;
346	{
347	errno = req->errorno;
348		355
349	ENTER;	356	ENTER;
350	SAVETMPS;	357	SAVETMPS;
351	PUSHMARK (SP);	358	PUSHMARK (SP);
352	EXTEND (SP, 1);	359	EXTEND (SP, 1);
353		360
		361	/* do not recreate the result IV from scratch each time */
		362	if (expect_true (sv_result_cache))
		363	{
		364	sv_result = sv_result_cache; sv_result_cache = 0;
		365	SvIV_set (sv_result, req->result);
		366	SvIOK_only (sv_result);
		367	}
		368	else
		369	{
		370	sv_result = newSViv (req->result);
		371	SvREADONLY_on (sv_result);
		372	}
		373
354	switch (req->type)	374	switch (req->type)
355	{	375	{
		376	case EIO_WD_OPEN:
		377	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		378	break;
		379
356	case REQ_READDIR:	380	case EIO_READDIR:
357	{	381	{
358	SV *rv = &PL_sv_undef;	382	SV *rv = &PL_sv_undef;
359		383
360	if (req->result >= 0)	384	if (req->result >= 0)
361	{	385	{
362	int i;	386	int i;
363	char *buf = req->data2ptr;	387	char *names = (char *)req->ptr2;
		388	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
364	AV *av = newAV ();	389	AV *av = newAV ();
365		390
366	av_extend (av, req->result - 1);	391	av_extend (av, req->result - 1);
367		392
368	for (i = 0; i < req->result; ++i)	393	for (i = 0; i < req->result; ++i)
369	{	394	{
370	SV *sv = newSVpv (buf, 0);	395	if (req->int1 & EIO_READDIR_DENTS)
		396	{
		397	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
371		398
		399	if (req->int1 & EIO_READDIR_CUSTOM2)
		400	{
		401	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		402	AV *avent = newAV ();
		403
		404	av_extend (avent, 2);
		405
		406	if (!sv_type [ent->type])
		407	{
		408	sv_type [ent->type] = newSViv (ent->type);
		409	SvREADONLY_on (sv_type [ent->type]);
		410	}
		411
		412	av_store (avent, 0, namesv);
		413	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		414	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		415
		416	av_store (av, i, newRV_noinc ((SV *)avent));
		417	}
		418	else
372	av_store (av, i, sv);	419	av_store (av, i, namesv);
		420
		421	++ent;
		422	}
		423	else
		424	{
		425	SV *name = newSVpv (names, 0);
		426	av_store (av, i, name);
373	buf += SvCUR (sv) + 1;	427	names += SvCUR (name) + 1;
		428	}
374	}	429	}
375		430
376	rv = sv_2mortal (newRV_noinc ((SV *)av));	431	rv = sv_2mortal (newRV_noinc ((SV *)av));
377	}	432	}
378		433
379	PUSHs (rv);	434	PUSHs (rv);
		435
		436	if (req->int1 & EIO_READDIR_CUSTOM1)
		437	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
380	}	438	}
381	break;	439	break;
382		440
383	case REQ_OPEN:	441	case EIO_OPEN:
384	{	442	{
385	/* convert fd to fh */	443	/* convert fd to fh */
386	SV *fh;	444	SV *fh = &PL_sv_undef;
387		445
388	PUSHs (sv_2mortal (newSViv (req->result)));	446	if (req->result >= 0)
389	PUTBACK;	447	{
390	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	448	GV *gv = (GV *)sv_newmortal ();
391	SPAGAIN;	449	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		450	char sym [64];
		451	int symlen;
		452
		453	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		454	gv_init (gv, aio_stash, sym, symlen, 0);
392		455
393	fh = SvREFCNT_inc (POPs);	456	symlen = snprintf (
		457	sym,
		458	sizeof (sym),
		459	"%s&=%d",
		460	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		461	(int)req->result
		462	);
394		463
		464	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		465	fh = (SV *)gv;
		466	}
		467
395	PUSHMARK (SP);	468	PUSHs (fh);
396	XPUSHs (sv_2mortal (fh));
397	}	469	}
398	break;	470	break;
399		471
		472	case EIO_STATVFS:
		473	case EIO_FSTATVFS:
		474	{
		475	SV *rv = &PL_sv_undef;
		476
		477	#ifndef _WIN32
		478	if (req->result >= 0)
		479	{
		480	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		481	HV *hv = newHV ();
		482
		483	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		484
		485	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		486	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		487	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		488	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		489	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		490	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		491	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		492	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		493	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		494	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		495	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		496	}
		497	#endif
		498
		499	PUSHs (rv);
		500	}
		501
		502	break;
		503
400	case REQ_GROUP:	504	case EIO_GROUP:
401	req->fd = 2; /* mark group as finished */	505	req->int1 = 2; /* mark group as finished */
402		506
403	if (req->data)	507	if (req->sv1)
404	{	508	{
405	int i;	509	int i;
406	AV *av = (AV *)req->data;	510	AV *av = (AV *)req->sv1;
407		511
408	EXTEND (SP, AvFILL (av) + 1);	512	EXTEND (SP, AvFILL (av) + 1);
409	for (i = 0; i <= AvFILL (av); ++i)	513	for (i = 0; i <= AvFILL (av); ++i)
410	PUSHs (*av_fetch (av, i, 0));	514	PUSHs (*av_fetch (av, i, 0));
411	}	515	}
412	break;	516	break;
413		517
414	case REQ_NOP:	518	case EIO_NOP:
415	case REQ_BUSY:	519	case EIO_BUSY:
416	break;	520	break;
417		521
		522	case EIO_READLINK:
		523	case EIO_REALPATH:
		524	if (req->result > 0)
		525	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		526	break;
		527
		528	case EIO_STAT:
		529	case EIO_LSTAT:
		530	case EIO_FSTAT:
		531	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		532
		533	if (!(PL_laststatval = req->result))
		534	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		535	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		536
		537	PUSHs (sv_result);
		538	break;
		539
		540	case EIO_SEEK:
		541	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		542	break;
		543
		544	case EIO_READ:
		545	{
		546	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		547	*SvEND (req->sv2) = 0;
		548	SvPOK_only (req->sv2);
		549	SvSETMAGIC (req->sv2);
		550	PUSHs (sv_result);
		551	}
		552	break;
		553
		554	case EIO_CUSTOM:
		555	if (req->feed == fiemap)
		556	{
		557	#if HAVE_FIEMAP
		558	if (!req->result)
		559	{
		560	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		561
		562	if (fiemap->fm_extent_count)
		563	{
		564	AV *av = newAV ();
		565	int i;
		566
		567	while (fiemap->fm_mapped_extents)
		568	{
		569	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		570	AV *ext_av = newAV ();
		571
		572	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		573	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		574	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		575	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		576
		577	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		578	}
		579
		580	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		581	}
		582	else
		583	{
		584	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		585	PUSHs (sv_result);
		586	}
		587	}
		588	#endif
		589	}
		590	else
		591	PUSHs (sv_result);
		592	break;
		593
		594	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		595	if (req->result > 0)
		596	SvIV_set (sv_result, 0);
		597	/* FALLTHROUGH */
		598
418	default:	599	default:
419	PUSHs (sv_2mortal (newSViv (req->result)));	600	PUSHs (sv_result);
420	break;	601	break;
421	}	602	}
422		603
		604	errno = req->errorno;
423		605
424	PUTBACK;	606	PUTBACK;
425	call_sv (req->callback, G_VOID | G_EVAL);	607	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
426	SPAGAIN;	608	SPAGAIN;
		609
		610	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		611	SvREFCNT_dec (sv_result);
		612	else
		613	sv_result_cache = sv_result;
427		614
428	FREETMPS;	615	FREETMPS;
429	LEAVE;	616	LEAVE;
		617
		618	PUTBACK;
430	}	619	}
431		620
432	if (req->grp)	621	return !!SvTRUE (ERRSV);
433	{
434	aio_req grp = req->grp;
435
436	/* unlink request */
437	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
438	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
439
440	if (grp->grp_first == req)
441	grp->grp_first = req->grp_next;
442
443	aio_grp_dec (grp);
444	}
445
446	if (SvTRUE (ERRSV))
447	{
448	req_free (req);
449	croak (0);
450	}
451	}	622	}
452		623
453	static void req_free (aio_req req)	624	static void
		625	req_destroy (aio_req req)
454	{	626	{
455	if (req->self)	627	if (req->self)
456	{	628	{
457	sv_unmagic (req->self, PERL_MAGIC_ext);	629	sv_unmagic (req->self, PERL_MAGIC_ext);
458	SvREFCNT_dec (req->self);	630	SvREFCNT_dec (req->self);
459	}	631	}
460		632
461	SvREFCNT_dec (req->data);
462	SvREFCNT_dec (req->fh);	633	SvREFCNT_dec (req->sv1);
463	SvREFCNT_dec (req->fh2);	634	SvREFCNT_dec (req->sv2);
		635	SvREFCNT_dec (req->sv3);
		636	SvREFCNT_dec (req->sv4);
464	SvREFCNT_dec (req->callback);	637	SvREFCNT_dec (req->callback);
465	Safefree (req->statdata);
466		638
467	if (req->type == REQ_READDIR)
468	free (req->data2ptr);
469
470	Safefree (req);	639	free (req);
471	}	640	}
472		641
473	static void req_cancel (aio_req req)	642	static void
		643	req_cancel_subs (aio_req grp)
474	{	644	{
475	req->flags |= FLAG_CANCELLED;
476
477	if (req->type == REQ_GROUP)	645	if (grp->type != EIO_GROUP)
		646	return;
		647
		648	SvREFCNT_dec (grp->sv2);
		649	grp->sv2 = 0;
		650
		651	eio_grp_cancel (grp);
		652	}
		653
		654	static void ecb_cold
		655	create_respipe (void)
		656	{
		657	if (s_epipe_renew (&respipe))
		658	croak ("IO::AIO: unable to initialize result pipe");
		659	}
		660
		661	static void
		662	poll_wait (void)
		663	{
		664	while (eio_nreqs ())
478	{	665	{
479	aio_req sub;	666	int size;
480		667
481	for (sub = req->grp_first; sub; sub = sub->grp_next)	668	X_LOCK (reslock);
482	req_cancel (sub);	669	size = res_queue.size;
		670	X_UNLOCK (reslock);
		671
		672	if (size)
		673	return;
		674
		675	etp_maybe_start_thread ();
		676
		677	s_epipe_wait (&respipe);
483	}	678	}
484	}	679	}
485		680
486	static int poll_cb ()	681	static int
		682	poll_cb (void)
487	{	683	{
488	dSP;
489	int count = 0;
490	int do_croak = 0;
491	aio_req req;
492
493	for (;;)	684	for (;;)
494	{	685	{
495	LOCK (reslock);	686	int res = eio_poll ();
496	req = reqq_shift (&res_queue);
497		687
498	if (req)	688	if (res > 0)
		689	croak (0);
		690
		691	if (!max_outstanding || max_outstanding > eio_nreqs ())
		692	return res;
		693
		694	poll_wait ();
		695	}
		696	}
		697
		698	static void ecb_cold
		699	reinit (void)
		700	{
		701	create_respipe ();
		702
		703	if (eio_init (want_poll, done_poll) < 0)
		704	croak ("IO::AIO: unable to initialise eio library");
		705	}
		706
		707	/*****************************************************************************/
		708
		709	#if !_POSIX_MAPPED_FILES
		710	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		711	# define munmap(addr,length) EIO_ENOSYS ()
		712	#endif
		713
		714	#if !_POSIX_MEMORY_PROTECTION
		715	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		716	# define PROT_NONE 0
		717	# define PROT_WRITE 0
		718	# define MAP_PRIVATE 0
		719	# define MAP_SHARED 0
		720	# define MAP_FIXED 0
		721	#endif
		722
		723	#define MMAP_MAGIC PERL_MAGIC_ext
		724
		725	static int ecb_cold
		726	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		727	{
		728	int old_errno = errno;
		729	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		730	errno = old_errno;
		731
		732	mg->mg_obj = 0; /* just in case */
		733
		734	SvREADONLY_off (sv);
		735
		736	if (SvPVX (sv) != mg->mg_ptr)
		737	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		738
		739	SvCUR_set (sv, 0);
		740	SvPVX (sv) = 0;
		741	SvOK_off (sv);
		742
		743	return 0;
		744	}
		745
		746	static MGVTBL mmap_vtbl = {
		747	0, 0, 0, 0, mmap_free
		748	};
		749
		750	/*****************************************************************************/
		751
		752	static SV *
		753	get_cb (SV *cb_sv)
		754	{
		755	SvGETMAGIC (cb_sv);
		756	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		757	}
		758
		759	static aio_req ecb_noinline
		760	dreq (SV *callback)
		761	{
		762	SV *cb_cv;
		763	aio_req req;
		764	int req_pri = next_pri;
		765	next_pri = EIO_PRI_DEFAULT;
		766
		767	cb_cv = get_cb (callback);
		768
		769	req = calloc (sizeof (*req), 1);
		770	if (!req)
		771	croak ("out of memory during eio_req allocation");
		772
		773	req->callback = SvREFCNT_inc (cb_cv);
		774	req->pri = req_pri;
		775
		776	return req;
		777	}
		778
		779	#define dREQ \
		780	aio_req req = dreq (callback); \
		781
		782	#define REQ_SEND \
		783	PUTBACK; \
		784	req_submit (req); \
		785	SPAGAIN; \
		786	\
		787	if (GIMME_V != G_VOID) \
		788	XPUSHs (req_sv (req, aio_req_stash));
		789
		790	ecb_inline void
		791	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		792	{
		793	if (expect_false (SvROK (path)))
		794	{
		795	SV *rv = SvRV (path);
		796	SV *wdob;
		797
		798	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
499	{	799	{
500	if (!res_queue.size)	800	path = AvARRAY (rv)[1];
		801	wdob = AvARRAY (rv)[0];
		802
		803	if (SvOK (wdob))
501	{	804	{
502	/* read any signals sent by the worker threads */	805	*wd = SvAIO_WD (wdob);
503	char buf [32];	806	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
504	while (read (respipe [0], buf, 32) == 32)
505	;
506	}	807	}
		808	else
		809	*wd = EIO_INVALID_WD;
507	}	810	}
508		811	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
509	UNLOCK (reslock);
510
511	if (!req)
512	break;
513
514	--nreqs;
515
516	if (req->type == REQ_QUIT)
517	started--;
518	else if (req->type == REQ_GROUP && req->length)
519	{	812	{
520	req->fd = 1; /* mark request as delayed */	813	*wd = (aio_wd)(long)SvIVX (rv);
521	continue;	814	*wdsv = SvREFCNT_inc_NN (rv);
		815	*ptr = ".";
		816	return; /* path set to "." */
522	}	817	}
523	else	818	else
524	{	819	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
525	if (req->type == REQ_READ)
526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
527
528	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529	SvREADONLY_off (req->data);
530
531	if (req->statdata)
532	{
533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
534	PL_laststatval = req->result;
535	PL_statcache = *(req->statdata);
536	}
537
538	req_invoke (req);
539
540	count++;
541	}
542
543	req_free (req);
544	}	820	}
545		821
546	return count;	822	*pathsv = newSVsv (path);
		823	*ptr = SvPVbyte_nolen (*pathsv);
547	}	824	}
548		825
549	static void *aio_proc(void *arg);	826	static void ecb_noinline
550		827	req_set_path1 (aio_req req, SV *path)
551	static void start_thread (void)
552	{	828	{
553	worker *wrk = calloc (1, sizeof (worker));	829	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		830	}
554		831
555	if (!wrk)	832	static void ecb_noinline
556	croak ("unable to allocate worker thread data");	833	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		834	{
		835	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
557		836
558	sigset_t fullsigset, oldsigset;	837	switch (SvTYPE (rv))
559	pthread_attr_t attr;
560
561	pthread_attr_init (&attr);
562	pthread_attr_setstacksize (&attr, STACKSIZE);
563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
564
565	sigfillset (&fullsigset);
566
567	LOCK (wrklock);
568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
569
570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
571	{	838	{
572	wrk->prev = &wrk_first;	839	case SVt_PVIO:
573	wrk->next = wrk_first.next;	840	case SVt_PVLV:
574	wrk_first.next->prev = wrk;	841	case SVt_PVGV:
575	wrk_first.next = wrk;	842	req->type = type_fh;
576	started++;	843	req->sv1 = newSVsv (fh_or_path);
		844	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		845	break;
		846
		847	default:
		848	req->type = type_path;
		849	req_set_path1 (req, fh_or_path);
		850	break;
577	}	851	}
578	else
579	free (wrk);
580
581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
582	UNLOCK (wrklock);
583	}	852	}
584		853
585	static void req_send (aio_req req)	854	XS(boot_IO__AIO) ecb_cold;
586	{
587	while (started < wanted && nreqs >= started)
588	start_thread ();
589		855
590	++nreqs;	856	MODULE = IO::AIO PACKAGE = IO::AIO
591		857
592	LOCK (reqlock);	858	PROTOTYPES: ENABLE
593	reqq_push (&req_queue, req);
594	pthread_cond_signal (&reqwait);
595	UNLOCK (reqlock);
596		859
597	if (nreqs > max_outstanding)	860	BOOT:
598	for (;;)
599	{
600	poll_cb ();
601
602	if (nreqs <= max_outstanding)
603	break;
604
605	poll_wait ();
606	}
607	}
608
609	static void end_thread (void)
610	{	861	{
611	aio_req req;	862	static const struct {
		863	const char *name;
		864	IV iv;
		865	} *civ, const_iv[] = {
		866	# define const_niv(name, value) { # name, (IV) value },
		867	# define const_iv(name) { # name, (IV) name },
		868	# define const_eio(name) { # name, (IV) EIO_ ## name },
612		869
613	Newz (0, req, 1, aio_cb);	870	/* you have to re-run ./gendef0 after adding/Removing any constants here */
614		871
615	req->type = REQ_QUIT;	872	const_iv (ENOSYS)
616	req->pri = PRI_MAX + PRI_BIAS;	873	const_iv (EXDEV)
		874	const_iv (EBADR)
617		875
618	req_send (req);	876	const_iv (O_RDONLY)
619	}	877	const_iv (O_WRONLY)
		878	const_iv (O_RDWR)
		879	const_iv (O_CREAT)
		880	const_iv (O_TRUNC)
		881	const_iv (O_EXCL)
		882	const_iv (O_APPEND)
620		883
621	static void min_parallel (int nthreads)	884	const_iv (O_ASYNC)
622	{	885	const_iv (O_DIRECT)
623	if (wanted < nthreads)	886	const_iv (O_NOATIME)
624	wanted = nthreads;
625	}
626		887
627	static void max_parallel (int nthreads)	888	const_iv (O_CLOEXEC)
628	{	889	const_iv (O_NOCTTY)
629	int cur = started;	890	const_iv (O_NOFOLLOW)
		891	const_iv (O_NONBLOCK)
		892	const_iv (O_EXEC)
		893	const_iv (O_SEARCH)
		894	const_iv (O_DIRECTORY)
		895	const_iv (O_DSYNC)
		896	const_iv (O_RSYNC)
		897	const_iv (O_SYNC)
		898	const_iv (O_TTY_INIT)
630		899
631	if (wanted > nthreads)	900	const_iv (S_IFIFO)
632	wanted = nthreads;	901	const_iv (S_IFCHR)
		902	const_iv (S_IFBLK)
		903	const_iv (S_IFLNK)
		904	const_iv (S_IFREG)
		905	const_iv (S_IFDIR)
		906	const_iv (S_IFWHT)
		907	const_iv (S_IFSOCK)
		908	const_iv (S_IFMT)
633		909
634	while (cur > wanted)	910	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
635	{	911	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
636	end_thread ();	912	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
637	cur--;	913	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
638	}	914	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		915	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
639		916
640	while (started > wanted)	917	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
641	{	918	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
642	poll_wait ();	919	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
643	poll_cb ();	920	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
644	}	921	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
645	}
646		922
647	static void create_pipe ()	923	const_iv (ST_RDONLY)
648	{	924	const_iv (ST_NOSUID)
649	if (pipe (respipe))	925	const_iv (ST_NODEV)
650	croak ("unable to initialize result pipe");	926	const_iv (ST_NOEXEC)
		927	const_iv (ST_SYNCHRONOUS)
		928	const_iv (ST_MANDLOCK)
		929	const_iv (ST_WRITE)
		930	const_iv (ST_APPEND)
		931	const_iv (ST_IMMUTABLE)
		932	const_iv (ST_NOATIME)
		933	const_iv (ST_NODIRATIME)
		934	const_iv (ST_RELATIME)
651		935
652	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	936	const_iv (PROT_NONE)
653	croak ("cannot set result pipe to nonblocking mode");	937	const_iv (PROT_EXEC)
		938	const_iv (PROT_READ)
		939	const_iv (PROT_WRITE)
654		940
655	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	941	/*const_iv (MAP_FIXED)*/
656	croak ("cannot set result pipe to nonblocking mode");	942	const_iv (MAP_PRIVATE)
657	}	943	const_iv (MAP_SHARED)
		944	const_iv (MAP_ANONYMOUS)
658		945
659	/*****************************************************************************/	946	/* linuxish */
660	/* work around various missing functions */	947	const_iv (MAP_HUGETLB)
		948	const_iv (MAP_LOCKED)
		949	const_iv (MAP_NORESERVE)
		950	const_iv (MAP_POPULATE)
		951	const_iv (MAP_NONBLOCK)
661		952
662	#if !HAVE_PREADWRITE	953	const_iv (FIEMAP_FLAG_SYNC)
663	# define pread aio_pread	954	const_iv (FIEMAP_FLAG_XATTR)
664	# define pwrite aio_pwrite	955	const_iv (FIEMAP_FLAGS_COMPAT)
		956	const_iv (FIEMAP_EXTENT_LAST)
		957	const_iv (FIEMAP_EXTENT_UNKNOWN)
		958	const_iv (FIEMAP_EXTENT_DELALLOC)
		959	const_iv (FIEMAP_EXTENT_ENCODED)
		960	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		961	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		962	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		963	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		964	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		965	const_iv (FIEMAP_EXTENT_MERGED)
		966	const_iv (FIEMAP_EXTENT_SHARED)
665		967
666	/*	968	const_iv (SPLICE_F_MOVE)
667	* make our pread/pwrite safe against themselves, but not against	969	const_iv (SPLICE_F_NONBLOCK)
668	* normal read/write by using a mutex. slows down execution a lot,	970	const_iv (SPLICE_F_MORE)
669	* but that's your problem, not mine.	971	const_iv (SPLICE_F_GIFT)
670	*/
671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
672		972
673	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	973	const_iv (SEEK_DATA)
674	{	974	const_iv (SEEK_HOLE)
675	ssize_t res;
676	off_t ooffset;
677		975
678	LOCK (preadwritelock);	976	/* libeio constants */
679	ooffset = lseek (fd, 0, SEEK_CUR);	977	const_eio (SEEK_SET)
680	lseek (fd, offset, SEEK_SET);	978	const_eio (SEEK_CUR)
681	res = read (fd, buf, count);	979	const_eio (SEEK_END)
682	lseek (fd, ooffset, SEEK_SET);
683	UNLOCK (preadwritelock);
684		980
685	return res;	981	const_eio (MCL_FUTURE)
686	}	982	const_eio (MCL_CURRENT)
687		983
688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	984	const_eio (MS_ASYNC)
689	{	985	const_eio (MS_INVALIDATE)
690	ssize_t res;	986	const_eio (MS_SYNC)
691	off_t ooffset;
692		987
693	LOCK (preadwritelock);	988	const_eio (MT_MODIFY)
694	ooffset = lseek (fd, 0, SEEK_CUR);
695	lseek (fd, offset, SEEK_SET);
696	res = write (fd, buf, count);
697	lseek (fd, offset, SEEK_SET);
698	UNLOCK (preadwritelock);
699		989
700	return res;	990	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
701	}	991	const_eio (SYNC_FILE_RANGE_WRITE)
702	#endif	992	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
703		993
704	#if !HAVE_FDATASYNC	994	const_eio (FALLOC_FL_KEEP_SIZE)
705	# define fdatasync fsync	995	const_eio (FALLOC_FL_PUNCH_HOLE)
706	#endif
707		996
708	#if !HAVE_READAHEAD	997	const_eio (READDIR_DENTS)
709	# define readahead aio_readahead	998	const_eio (READDIR_DIRS_FIRST)
		999	const_eio (READDIR_STAT_ORDER)
		1000	const_eio (READDIR_FOUND_UNKNOWN)
710		1001
711	static ssize_t readahead (int fd, off_t offset, size_t count)	1002	const_eio (DT_UNKNOWN)
712	{	1003	const_eio (DT_FIFO)
713	dBUF;	1004	const_eio (DT_CHR)
714		1005	const_eio (DT_DIR)
715	while (count > 0)	1006	const_eio (DT_BLK)
716	{	1007	const_eio (DT_REG)
717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	1008	const_eio (DT_LNK)
718		1009	const_eio (DT_SOCK)
719	pread (fd, aio_buf, len, offset);	1010	const_eio (DT_WHT)
720	offset += len;
721	count -= len;
722	}
723
724	errno = 0;
725	}
726	#endif
727
728	#if !HAVE_READDIR_R
729	# define readdir_r aio_readdir_r
730
731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
732
733	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
734	{
735	struct dirent *e;
736	int errorno;
737
738	LOCK (readdirlock);
739
740	e = readdir (dirp);
741	errorno = errno;
742
743	if (e)
744	{
745	*res = ent;
746	strcpy (ent->d_name, e->d_name);
747	}
748	else
749	*res = 0;
750
751	UNLOCK (readdirlock);
752
753	errno = errorno;
754	return e ? 0 : -1;
755	}
756	#endif
757
758	/* sendfile always needs emulation */
759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
760	{
761	ssize_t res;
762
763	if (!count)
764	return 0;
765
766	#if HAVE_SENDFILE
767	# if __linux
768	res = sendfile (ofd, ifd, &offset, count);
769
770	# elif __freebsd
771	/*
772	* Of course, the freebsd sendfile is a dire hack with no thoughts
773	* wasted on making it similar to other I/O functions.
774	*/
775	{
776	off_t sbytes;
777	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778
779	if (res < 0 && sbytes)
780	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
781	res = sbytes;
782	}	1011	};
783		1012
784	# elif __hpux	1013	aio_stash = gv_stashpv ("IO::AIO" , 1);
785	res = sendfile (ofd, ifd, offset, count, 0, 0);	1014	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1015	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1016	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
786		1017
787	# elif __solaris	1018	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
788	{	1019	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
789	struct sendfilevec vec;
790	size_t sbytes;
791		1020
792	vec.sfv_fd = ifd;	1021	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
793	vec.sfv_flag = 0;
794	vec.sfv_off = offset;
795	vec.sfv_len = count;
796		1022
797	res = sendfilev (ofd, &vec, 1, &sbytes);	1023	reinit ();
		1024	}
798		1025
799	if (res < 0 && sbytes)	1026	void
		1027	reinit ()
		1028	PROTOTYPE:
		1029
		1030	void
		1031	max_poll_reqs (unsigned int nreqs)
		1032	PROTOTYPE: $
		1033	CODE:
		1034	eio_set_max_poll_reqs (nreqs);
		1035
		1036	void
		1037	max_poll_time (double nseconds)
		1038	PROTOTYPE: $
		1039	CODE:
		1040	eio_set_max_poll_time (nseconds);
		1041
		1042	void
		1043	min_parallel (unsigned int nthreads)
		1044	PROTOTYPE: $
		1045	CODE:
		1046	eio_set_min_parallel (nthreads);
		1047
		1048	void
		1049	max_parallel (unsigned int nthreads)
		1050	PROTOTYPE: $
		1051	CODE:
		1052	eio_set_max_parallel (nthreads);
		1053
		1054	void
		1055	max_idle (unsigned int nthreads)
		1056	PROTOTYPE: $
		1057	CODE:
		1058	eio_set_max_idle (nthreads);
		1059
		1060	void
		1061	idle_timeout (unsigned int seconds)
		1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_idle_timeout (seconds);
		1065
		1066	void
		1067	max_outstanding (unsigned int maxreqs)
		1068	PROTOTYPE: $
		1069	CODE:
		1070	max_outstanding = maxreqs;
		1071
		1072	void
		1073	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1074	PPCODE:
		1075	{
		1076	dREQ;
		1077
		1078	req->type = EIO_WD_OPEN;
		1079	req_set_path1 (req, pathname);
		1080
		1081	REQ_SEND;
		1082	}
		1083
		1084	void
		1085	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1086	PPCODE:
		1087	{
		1088	dREQ;
		1089
		1090	req->type = EIO_OPEN;
		1091	req_set_path1 (req, pathname);
		1092	req->int1 = flags;
		1093	req->int2 = mode;
		1094
		1095	REQ_SEND;
		1096	}
		1097
		1098	void
		1099	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1100	ALIAS:
		1101	aio_fsync = EIO_FSYNC
		1102	aio_fdatasync = EIO_FDATASYNC
		1103	aio_syncfs = EIO_SYNCFS
		1104	PPCODE:
		1105	{
		1106	int fd = s_fileno_croak (fh, 0);
		1107	dREQ;
		1108
		1109	req->type = ix;
		1110	req->sv1 = newSVsv (fh);
		1111	req->int1 = fd;
		1112
		1113	REQ_SEND;
		1114	}
		1115
		1116	void
		1117	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1118	PPCODE:
		1119	{
		1120	int fd = s_fileno_croak (fh, 0);
		1121	dREQ;
		1122
		1123	req->type = EIO_SYNC_FILE_RANGE;
		1124	req->sv1 = newSVsv (fh);
		1125	req->int1 = fd;
		1126	req->offs = offset;
800	res = sbytes;	1127	req->size = nbytes;
801	}	1128	req->int2 = flags;
802		1129
803	# endif	1130	REQ_SEND;
		1131	}
		1132
		1133	void
		1134	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1135	PPCODE:
		1136	{
		1137	int fd = s_fileno_croak (fh, 0);
		1138	dREQ;
		1139
		1140	req->type = EIO_FALLOCATE;
		1141	req->sv1 = newSVsv (fh);
		1142	req->int1 = fd;
		1143	req->int2 = mode;
		1144	req->offs = offset;
		1145	req->size = len;
		1146
		1147	REQ_SEND;
		1148	}
		1149
		1150	void
		1151	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1152	PPCODE:
		1153	{
		1154	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1155	int fd = s_fileno_croak (fh, 0);
		1156	dREQ;
		1157
		1158	if (expect_false (close_fd < 0))
		1159	{
		1160	int pipefd [2];
		1161
		1162	if (
		1163	#ifdef _WIN32
		1164	_pipe (pipefd, 1, _O_BINARY) < 0
804	#else	1165	#else
805	res = -1;	1166	pipe (pipefd) < 0
806	errno = ENOSYS;	1167	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
807	#endif	1168	#endif
808		1169	|| close (pipefd [1]) < 0
809	if (res < 0
810	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
811	#if __solaris
812	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
813	#endif
814	)
815	)
816	{
817	/* emulate sendfile. this is a major pain in the ass */
818	dBUF;
819
820	res = 0;
821
822	while (count)
823	{
824	ssize_t cnt;
825
826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
827
828	if (cnt <= 0)
829	{	1170	)
830	if (cnt && !res) res = -1;	1171	abort (); /*D*/
831	break;
832	}
833		1172
834	cnt = write (ofd, aio_buf, cnt);	1173	close_fd = pipefd [0];
835
836	if (cnt <= 0)
837	{
838	if (cnt && !res) res = -1;
839	break;
840	}
841
842	offset += cnt;
843	res += cnt;
844	count -= cnt;
845	}
846	}
847
848	return res;
849	}
850
851	/* read a full directory */
852	static void scandir_ (aio_req req, worker *self)
853	{
854	DIR *dirp;
855	union
856	{
857	struct dirent d;
858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
859	} *u;
860	struct dirent *entp;
861	char *name, *names;
862	int memlen = 4096;
863	int memofs = 0;
864	int res = 0;
865	int errorno;
866
867	LOCK (wrklock);
868	self->dirp = dirp = opendir (req->dataptr);
869	self->dbuf = u = malloc (sizeof (*u));
870	UNLOCK (wrklock);
871
872	req->data2ptr = names = malloc (memlen);
873
874	if (dirp && u && names)
875	for (;;)
876	{
877	errno = 0;
878	readdir_r (dirp, &u->d, &entp);
879
880	if (!entp)
881	break;
882
883	name = entp->d_name;
884
885	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
886	{
887	int len = strlen (name) + 1;
888
889	res++;
890
891	while (memofs + len > memlen)
892	{
893	memlen *= 2;
894	LOCK (wrklock);
895	req->data2ptr = names = realloc (names, memlen);
896	UNLOCK (wrklock);
897
898	if (!names)
899	break;
900	}
901
902	memcpy (names + memofs, name, len);
903	memofs += len;
904	}	1174	}
905	}
906		1175
907	if (errno)	1176	req->type = EIO_DUP2;
908	res = -1;	1177	req->int1 = close_fd;
909		1178	req->sv2 = newSVsv (fh);
910	req->result = res;	1179	req->int2 = fd;
911	}
912		1180
913	/*****************************************************************************/	1181	REQ_SEND;
914
915	static void *aio_proc (void *thr_arg)
916	{
917	aio_req req;
918	int type;
919	worker *self = (worker *)thr_arg;
920
921	do
922	{
923	LOCK (reqlock);
924
925	for (;;)
926	{
927	self->req = req = reqq_shift (&req_queue);
928
929	if (req)
930	break;
931
932	pthread_cond_wait (&reqwait, &reqlock);
933	}
934
935	UNLOCK (reqlock);
936
937	errno = 0; /* strictly unnecessary */
938	type = req->type; /* remember type for QUIT check */
939
940	if (!(req->flags & FLAG_CANCELLED))
941	switch (type)
942	{
943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
945
946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
948
949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
952
953	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
954	case REQ_CLOSE: req->result = close (req->fd); break;
955	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
956	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
957	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
960
961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
962	case REQ_FSYNC: req->result = fsync (req->fd); break;
963	case REQ_READDIR: scandir_ (req, self); break;
964
965	case REQ_BUSY:
966	{
967	struct timeval tv;
968
969	tv.tv_sec = req->fd;
970	tv.tv_usec = req->fd2;
971
972	req->result = select (0, 0, 0, 0, &tv);
973	}
974
975	case REQ_GROUP:
976	case REQ_NOP:
977	case REQ_QUIT:
978	break;
979
980	default:
981	req->result = ENOSYS;
982	break;
983	}
984
985	req->errorno = errno;
986
987	LOCK (reslock);
988
989	if (!reqq_push (&res_queue, req))
990	/* write a dummy byte to the pipe so fh becomes ready */
991	write (respipe [1], &respipe, 1);
992
993	self->req = 0;
994	worker_clear (self);
995
996	UNLOCK (reslock);
997	}
998	while (type != REQ_QUIT);
999
1000	LOCK (wrklock);
1001	worker_free (self);
1002	UNLOCK (wrklock);
1003
1004	return 0;
1005	}	1182	}
1006		1183
1007	/*****************************************************************************/
1008
1009	static void atfork_prepare (void)
1010	{
1011	LOCK (wrklock);
1012	LOCK (reqlock);
1013	LOCK (reslock);
1014	#if !HAVE_PREADWRITE
1015	LOCK (preadwritelock);
1016	#endif
1017	#if !HAVE_READDIR_R
1018	LOCK (readdirlock);
1019	#endif
1020	}
1021
1022	static void atfork_parent (void)
1023	{
1024	#if !HAVE_READDIR_R
1025	UNLOCK (readdirlock);
1026	#endif
1027	#if !HAVE_PREADWRITE
1028	UNLOCK (preadwritelock);
1029	#endif
1030	UNLOCK (reslock);
1031	UNLOCK (reqlock);
1032	UNLOCK (wrklock);
1033	}
1034
1035	static void atfork_child (void)
1036	{
1037	aio_req prv;
1038
1039	while (prv = reqq_shift (&req_queue))
1040	req_free (prv);
1041
1042	while (prv = reqq_shift (&res_queue))
1043	req_free (prv);
1044
1045	while (wrk_first.next != &wrk_first)
1046	{
1047	worker *wrk = wrk_first.next;
1048
1049	if (wrk->req)
1050	req_free (wrk->req);
1051
1052	worker_clear (wrk);
1053	worker_free (wrk);
1054	}
1055
1056	started = 0;
1057	nreqs = 0;
1058
1059	close (respipe [0]);
1060	close (respipe [1]);
1061	create_pipe ();
1062
1063	atfork_parent ();
1064	}
1065
1066	#define dREQ \
1067	aio_req req; \
1068	int req_pri = next_pri; \
1069	next_pri = DEFAULT_PRI + PRI_BIAS; \
1070	\
1071	if (SvOK (callback) && !SvROK (callback)) \
1072	croak ("callback must be undef or of reference type"); \
1073	\
1074	Newz (0, req, 1, aio_cb); \
1075	if (!req) \
1076	croak ("out of memory during aio_req allocation"); \
1077	\
1078	req->callback = newSVsv (callback); \
1079	req->pri = req_pri
1080
1081	#define REQ_SEND \
1082	req_send (req); \
1083	\
1084	if (GIMME_V != G_VOID) \
1085	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1086
1087	MODULE = IO::AIO PACKAGE = IO::AIO
1088
1089	PROTOTYPES: ENABLE
1090
1091	BOOT:
1092	{
1093	HV *stash = gv_stashpv ("IO::AIO", 1);
1094	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1095	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1096	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1097
1098	create_pipe ();
1099	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1100	}
1101
1102	void	1184	void
1103	min_parallel (nthreads)	1185	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1104	int nthreads
1105	PROTOTYPE: $
1106
1107	void
1108	max_parallel (nthreads)
1109	int nthreads
1110	PROTOTYPE: $
1111
1112	int
1113	max_outstanding (nreqs)
1114	int nreqs
1115	PROTOTYPE: $
1116	CODE:	1186	PPCODE:
1117	RETVAL = max_outstanding;
1118	max_outstanding = nreqs;
1119
1120	void
1121	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1122	SV * pathname
1123	int flags
1124	int mode
1125	SV * callback
1126	PROTOTYPE: $$$;$
1127	PPCODE:
1128	{	1187	{
		1188	int fd = s_fileno_croak (fh, 0);
1129	dREQ;	1189	dREQ;
1130		1190
1131	req->type = REQ_OPEN;	1191	req->type = EIO_SEEK;
1132	req->data = newSVsv (pathname);	1192	req->sv1 = newSVsv (fh);
1133	req->dataptr = SvPVbyte_nolen (req->data);	1193	req->int1 = fd;
1134	req->fd = flags;	1194	req->offs = SvVAL64 (offset);
1135	req->mode = mode;	1195	req->int2 = whence;
1136		1196
1137	REQ_SEND;	1197	REQ_SEND;
1138	}	1198	}
1139		1199
1140	void	1200	void
1141	aio_close (fh,callback=&PL_sv_undef)	1201	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1142	SV * fh
1143	SV * callback
1144	PROTOTYPE: $;$
1145	ALIAS:	1202	ALIAS:
1146	aio_close = REQ_CLOSE
1147	aio_fsync = REQ_FSYNC
1148	aio_fdatasync = REQ_FDATASYNC
1149	PPCODE:
1150	{
1151	dREQ;
1152
1153	req->type = ix;
1154	req->fh = newSVsv (fh);
1155	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1156
1157	REQ_SEND (req);
1158	}
1159
1160	void
1161	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1162	SV * fh
1163	UV offset
1164	UV length
1165	SV * data
1166	UV dataoffset
1167	SV * callback
1168	ALIAS:
1169	aio_read = REQ_READ	1203	aio_read = EIO_READ
1170	aio_write = REQ_WRITE	1204	aio_write = EIO_WRITE
1171	PROTOTYPE: $$$$$;$
1172	PPCODE:	1205	PPCODE:
1173	{	1206	{
1174	aio_req req;
1175	STRLEN svlen;	1207	STRLEN svlen;
		1208	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1176	char *svptr = SvPVbyte (data, svlen);	1209	char *svptr = SvPVbyte (data, svlen);
1177		1210	UV len = SvUV (length);
1178	SvUPGRADE (data, SVt_PV);
1179	SvPOK_on (data);
1180		1211
1181	if (dataoffset < 0)	1212	if (dataoffset < 0)
1182	dataoffset += svlen;	1213	dataoffset += svlen;
1183		1214
1184	if (dataoffset < 0 || dataoffset > svlen)	1215	if (dataoffset < 0 || dataoffset > svlen)
1185	croak ("data offset outside of string");	1216	croak ("dataoffset outside of data scalar");
1186		1217
1187	if (ix == REQ_WRITE)	1218	if (ix == EIO_WRITE)
1188	{	1219	{
1189	/* write: check length and adjust. */	1220	/* write: check length and adjust. */
1190	if (length < 0 || length + dataoffset > svlen)	1221	if (!SvOK (length) || len + dataoffset > svlen)
1191	length = svlen - dataoffset;	1222	len = svlen - dataoffset;
1192	}	1223	}
1193	else	1224	else
1194	{	1225	{
1195	/* read: grow scalar as necessary */	1226	/* read: check type and grow scalar as necessary */
		1227	SvUPGRADE (data, SVt_PV);
		1228	if (SvLEN (data) >= SvCUR (data))
1196	svptr = SvGROW (data, length + dataoffset);	1229	svptr = SvGROW (data, len + dataoffset + 1);
		1230	else if (SvCUR (data) < len + dataoffset)
		1231	croak ("length + dataoffset outside of scalar, and cannot grow");
1197	}	1232	}
1198
1199	if (length < 0)
1200	croak ("length must not be negative");
1201		1233
1202	{	1234	{
1203	dREQ;	1235	dREQ;
1204		1236
1205	req->type = ix;	1237	req->type = ix;
1206	req->fh = newSVsv (fh);	1238	req->sv1 = newSVsv (fh);
1207	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1239	req->int1 = fd;
1208	: IoOFP (sv_2io (fh)));	1240	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1209	req->offset = offset;	1241	req->size = len;
1210	req->length = length;
1211	req->data = SvREFCNT_inc (data);	1242	req->sv2 = SvREFCNT_inc (data);
1212	req->dataptr = (char *)svptr + dataoffset;	1243	req->ptr2 = (char *)svptr + dataoffset;
		1244	req->stroffset = dataoffset;
1213		1245
1214	if (!SvREADONLY (data))	1246	if (!SvREADONLY (data))
1215	{	1247	{
1216	SvREADONLY_on (data);	1248	SvREADONLY_on (data);
1217	req->data2ptr = (void *)data;	1249	req->flags |= FLAG_SV2_RO_OFF;
1218	}	1250	}
1219		1251
1220	REQ_SEND;	1252	REQ_SEND;
1221	}	1253	}
1222	}	1254	}
1223		1255
1224	void	1256	void
1225	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1257	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1226	SV * out_fh	1258	ALIAS:
1227	SV * in_fh	1259	aio_readlink = EIO_READLINK
1228	UV in_offset	1260	aio_realpath = EIO_REALPATH
1229	UV length
1230	SV * callback
1231	PROTOTYPE: $$$$;$
1232	PPCODE:	1261	PPCODE:
1233	{	1262	{
		1263	dREQ;
		1264
		1265	req->type = ix;
		1266	req_set_path1 (req, pathname);
		1267
		1268	REQ_SEND;
		1269	}
		1270
		1271	void
		1272	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1273	PPCODE:
		1274	{
		1275	int ifd = s_fileno_croak (in_fh , 0);
		1276	int ofd = s_fileno_croak (out_fh, 1);
1234	dREQ;	1277	dREQ;
1235		1278
1236	req->type = REQ_SENDFILE;	1279	req->type = EIO_SENDFILE;
1237	req->fh = newSVsv (out_fh);	1280	req->sv1 = newSVsv (out_fh);
1238	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1281	req->int1 = ofd;
1239	req->fh2 = newSVsv (in_fh);	1282	req->sv2 = newSVsv (in_fh);
1240	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1283	req->int2 = ifd;
1241	req->offset = in_offset;	1284	req->offs = in_offset;
1242	req->length = length;	1285	req->size = length;
1243		1286
1244	REQ_SEND;	1287	REQ_SEND;
1245	}	1288	}
1246		1289
1247	void	1290	void
1248	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1291	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1249	SV * fh
1250	UV offset
1251	IV length
1252	SV * callback
1253	PROTOTYPE: $$$;$
1254	PPCODE:	1292	PPCODE:
1255	{	1293	{
		1294	int fd = s_fileno_croak (fh, 0);
1256	dREQ;	1295	dREQ;
1257		1296
1258	req->type = REQ_READAHEAD;	1297	req->type = EIO_READAHEAD;
1259	req->fh = newSVsv (fh);	1298	req->sv1 = newSVsv (fh);
1260	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1299	req->int1 = fd;
1261	req->offset = offset;	1300	req->offs = offset;
1262	req->length = length;	1301	req->size = length;
1263		1302
1264	REQ_SEND;	1303	REQ_SEND;
1265	}	1304	}
1266		1305
1267	void	1306	void
1268	aio_stat (fh_or_path,callback=&PL_sv_undef)	1307	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1269	SV * fh_or_path
1270	SV * callback
1271	ALIAS:	1308	ALIAS:
1272	aio_stat = REQ_STAT	1309	aio_stat = EIO_STAT
1273	aio_lstat = REQ_LSTAT	1310	aio_lstat = EIO_LSTAT
		1311	aio_statvfs = EIO_STATVFS
1274	PPCODE:	1312	PPCODE:
1275	{	1313	{
1276	dREQ;	1314	dREQ;
1277		1315
1278	New (0, req->statdata, 1, Stat_t);	1316	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1279	if (!req->statdata)
1280	{
1281	req_free (req);
1282	croak ("out of memory during aio_req->statdata allocation");
1283	}
1284
1285	if (SvPOK (fh_or_path))
1286	{
1287	req->type = ix;
1288	req->data = newSVsv (fh_or_path);
1289	req->dataptr = SvPVbyte_nolen (req->data);
1290	}
1291	else
1292	{
1293	req->type = REQ_FSTAT;
1294	req->fh = newSVsv (fh_or_path);
1295	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1296	}
1297		1317
1298	REQ_SEND;	1318	REQ_SEND;
1299	}	1319	}
1300		1320
		1321	UV
		1322	major (UV dev)
		1323	ALIAS:
		1324	minor = 1
		1325	CODE:
		1326	RETVAL = ix ? major (dev) : minor (dev);
		1327	OUTPUT:
		1328	RETVAL
		1329
		1330	UV
		1331	makedev (UV maj, UV min)
		1332	CODE:
		1333	RETVAL = makedev (maj, min);
		1334	OUTPUT:
		1335	RETVAL
		1336
1301	void	1337	void
		1338	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1339	PPCODE:
		1340	{
		1341	dREQ;
		1342
		1343	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1344	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1345	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1346
		1347	REQ_SEND;
		1348	}
		1349
		1350	void
		1351	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1352	PPCODE:
		1353	{
		1354	dREQ;
		1355
		1356	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1357	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1358
		1359	REQ_SEND;
		1360	}
		1361
		1362	void
		1363	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1364	PPCODE:
		1365	{
		1366	dREQ;
		1367
		1368	req->int2 = mode;
		1369	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1370
		1371	REQ_SEND;
		1372	}
		1373
		1374	void
		1375	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1376	PPCODE:
		1377	{
		1378	dREQ;
		1379
		1380	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1381	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1382	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1383
		1384	REQ_SEND;
		1385	}
		1386
		1387	void
		1388	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1389	PPCODE:
		1390	{
		1391	dREQ;
		1392
		1393	req->type = EIO_READDIR;
		1394	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1395
		1396	if (flags & EIO_READDIR_DENTS)
		1397	req->int1 |= EIO_READDIR_CUSTOM2;
		1398
		1399	req_set_path1 (req, pathname);
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	void
		1405	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1406	PPCODE:
		1407	{
		1408	dREQ;
		1409
		1410	req->type = EIO_MKDIR;
		1411	req->int2 = mode;
		1412	req_set_path1 (req, pathname);
		1413
		1414	REQ_SEND;
		1415	}
		1416
		1417	void
1302	aio_unlink (pathname,callback=&PL_sv_undef)	1418	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1303	SV * pathname
1304	SV * callback
1305	ALIAS:	1419	ALIAS:
1306	aio_unlink = REQ_UNLINK	1420	aio_unlink = EIO_UNLINK
1307	aio_rmdir = REQ_RMDIR	1421	aio_rmdir = EIO_RMDIR
1308	aio_readdir = REQ_READDIR	1422	aio_readdir = EIO_READDIR
1309	PPCODE:	1423	PPCODE:
1310	{	1424	{
1311	dREQ;	1425	dREQ;
1312		1426
1313	req->type = ix;	1427	req->type = ix;
1314	req->data = newSVsv (pathname);	1428	req_set_path1 (req, pathname);
1315	req->dataptr = SvPVbyte_nolen (req->data);	1429
1316
1317	REQ_SEND;	1430	REQ_SEND;
1318	}	1431	}
1319		1432
1320	void	1433	void
1321	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1434	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1322	SV * oldpath
1323	SV * newpath
1324	SV * callback
1325	ALIAS:	1435	ALIAS:
1326	aio_link = REQ_LINK	1436	aio_link = EIO_LINK
1327	aio_symlink = REQ_SYMLINK	1437	aio_symlink = EIO_SYMLINK
1328	aio_rename = REQ_RENAME	1438	aio_rename = EIO_RENAME
1329	PPCODE:	1439	PPCODE:
1330	{	1440	{
		1441	eio_wd wd2 = 0;
1331	dREQ;	1442	dREQ;
1332		1443
1333	req->type = ix;	1444	req->type = ix;
1334	req->fh = newSVsv (oldpath);	1445	req_set_path1 (req, oldpath);
1335	req->data2ptr = SvPVbyte_nolen (req->fh);	1446	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1336	req->data = newSVsv (newpath);	1447	req->int3 = (long)wd2;
1337	req->dataptr = SvPVbyte_nolen (req->data);
1338		1448
1339	REQ_SEND;	1449	REQ_SEND;
1340	}	1450	}
1341		1451
1342	void	1452	void
1343	aio_busy (delay,callback=&PL_sv_undef)	1453	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1344	double delay
1345	SV * callback
1346	PPCODE:	1454	PPCODE:
1347	{	1455	{
1348	dREQ;	1456	dREQ;
1349		1457
1350	req->type = REQ_BUSY;	1458	req->type = EIO_MKNOD;
1351	req->fd = delay < 0. ? 0 : delay;	1459	req->int2 = (mode_t)mode;
1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1460	req->offs = dev;
1353		1461	req_set_path1 (req, pathname);
		1462
1354	REQ_SEND;	1463	REQ_SEND;
1355	}	1464	}
1356		1465
1357	void	1466	void
1358	aio_group (callback=&PL_sv_undef)	1467	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1359	SV * callback	1468	ALIAS:
1360	PROTOTYPE: ;$	1469	aio_mtouch = EIO_MTOUCH
		1470	aio_msync = EIO_MSYNC
1361	PPCODE:	1471	PPCODE:
1362	{	1472	{
		1473	STRLEN svlen;
		1474	char *svptr = SvPVbyte (data, svlen);
		1475	UV len = SvUV (length);
		1476
		1477	if (offset < 0)
		1478	offset += svlen;
		1479
		1480	if (offset < 0 || offset > svlen)
		1481	croak ("offset outside of scalar");
		1482
		1483	if (!SvOK (length) || len + offset > svlen)
		1484	len = svlen - offset;
		1485
		1486	{
		1487	dREQ;
		1488
		1489	req->type = ix;
		1490	req->sv2 = SvREFCNT_inc (data);
		1491	req->ptr2 = (char *)svptr + offset;
		1492	req->size = len;
		1493	req->int1 = flags;
		1494
		1495	REQ_SEND;
		1496	}
		1497	}
		1498
		1499	void
		1500	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1501	PPCODE:
		1502	{
		1503	STRLEN svlen;
		1504	char *svptr = SvPVbyte (data, svlen);
		1505	UV len = SvUV (length);
		1506
		1507	if (offset < 0)
		1508	offset += svlen;
		1509
		1510	if (offset < 0 || offset > svlen)
		1511	croak ("offset outside of scalar");
		1512
		1513	if (!SvOK (length) || len + offset > svlen)
		1514	len = svlen - offset;
		1515
		1516	{
		1517	dREQ;
		1518
		1519	req->type = EIO_MLOCK;
		1520	req->sv2 = SvREFCNT_inc (data);
		1521	req->ptr2 = (char *)svptr + offset;
		1522	req->size = len;
		1523
		1524	REQ_SEND;
		1525	}
		1526	}
		1527
		1528	void
		1529	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1530	PPCODE:
		1531	{
		1532	dREQ;
		1533
		1534	req->type = EIO_MLOCKALL;
		1535	req->int1 = flags;
		1536
		1537	REQ_SEND;
		1538	}
		1539
		1540	void
		1541	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1542	PPCODE:
		1543	{
		1544	int fd = s_fileno_croak (fh, 0);
1363	dREQ;	1545	dREQ;
1364		1546
1365	req->type = REQ_GROUP;	1547	req->type = EIO_CUSTOM;
1366	req_send (req);	1548	req->sv1 = newSVsv (fh);
		1549	req->int1 = fd;
1367		1550
1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1551	req->feed = fiemap;
1369	}	1552	#if HAVE_FIEMAP
		1553	/* keep our fingers crossed that the next two types are 64 bit */
		1554	req->offs = start;
		1555	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1556	req->int2 = flags;
		1557	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1558	#endif
1370		1559
		1560	REQ_SEND;
		1561	}
		1562
1371	void	1563	void
1372	aio_nop (callback=&PL_sv_undef)	1564	aio_busy (double delay, SV *callback=&PL_sv_undef)
1373	SV * callback
1374	PPCODE:	1565	PPCODE:
1375	{	1566	{
1376	dREQ;	1567	dREQ;
1377		1568
1378	req->type = REQ_NOP;	1569	req->type = EIO_BUSY;
		1570	req->nv1 = delay < 0. ? 0. : delay;
1379		1571
1380	REQ_SEND;	1572	REQ_SEND;
1381	}	1573	}
1382		1574
1383	void	1575	void
1384	aioreq_pri (int pri = DEFAULT_PRI)	1576	aio_group (SV *callback=&PL_sv_undef)
1385	CODE:	1577	PPCODE:
		1578	{
		1579	dREQ;
		1580
		1581	req->type = EIO_GROUP;
		1582
		1583	req_submit (req);
		1584	XPUSHs (req_sv (req, aio_grp_stash));
		1585	}
		1586
		1587	void
		1588	aio_nop (SV *callback=&PL_sv_undef)
		1589	ALIAS:
		1590	aio_nop = EIO_NOP
		1591	aio_sync = EIO_SYNC
		1592	PPCODE:
		1593	{
		1594	dREQ;
		1595
		1596	req->type = ix;
		1597
		1598	REQ_SEND;
		1599	}
		1600
		1601	int
		1602	aioreq_pri (int pri = 0)
		1603	CODE:
		1604	RETVAL = next_pri;
		1605	if (items > 0)
		1606	{
1386	if (pri < PRI_MIN) pri = PRI_MIN;	1607	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1387	if (pri > PRI_MAX) pri = PRI_MAX;	1608	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1388	next_pri = pri + PRI_BIAS;	1609	next_pri = pri;
		1610	}
		1611	OUTPUT:
		1612	RETVAL
1389		1613
1390	void	1614	void
1391	aioreq_nice (int nice = 0)	1615	aioreq_nice (int nice = 0)
1392	CODE:	1616	CODE:
1393	nice = next_pri - nice;	1617	nice = next_pri - nice;
1394	if (nice < PRI_MIN) nice = PRI_MIN;	1618	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1395	if (nice > PRI_MAX) nice = PRI_MAX;	1619	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1396	next_pri = nice + PRI_BIAS;	1620	next_pri = nice;
1397		1621
1398	void	1622	void
1399	flush ()	1623	flush ()
1400	PROTOTYPE:
1401	CODE:	1624	CODE:
1402	while (nreqs)	1625	while (eio_nreqs ())
1403	{	1626	{
1404	poll_wait ();	1627	poll_wait ();
1405	poll_cb ();	1628	poll_cb ();
1406	}	1629	}
1407		1630
1408	void	1631	int
1409	poll()	1632	poll ()
1410	PROTOTYPE:
1411	CODE:	1633	CODE:
1412	if (nreqs)
1413	{
1414	poll_wait ();	1634	poll_wait ();
1415	poll_cb ();	1635	RETVAL = poll_cb ();
1416	}
1417
1418	int
1419	poll_fileno()
1420	PROTOTYPE:
1421	CODE:
1422	RETVAL = respipe [0];
1423	OUTPUT:	1636	OUTPUT:
1424	RETVAL	1637	RETVAL
1425		1638
1426	int	1639	int
		1640	poll_fileno ()
		1641	CODE:
		1642	RETVAL = s_epipe_fd (&respipe);
		1643	OUTPUT:
		1644	RETVAL
		1645
		1646	int
1427	poll_cb(...)	1647	poll_cb (...)
1428	PROTOTYPE:	1648	PROTOTYPE:
1429	CODE:	1649	CODE:
1430	RETVAL = poll_cb ();	1650	RETVAL = poll_cb ();
1431	OUTPUT:	1651	OUTPUT:
1432	RETVAL	1652	RETVAL
1433		1653
1434	void	1654	void
1435	poll_wait()	1655	poll_wait ()
1436	PROTOTYPE:
1437	CODE:	1656	CODE:
1438	if (nreqs)
1439	poll_wait ();	1657	poll_wait ();
1440		1658
1441	int	1659	int
1442	nreqs()	1660	nreqs ()
1443	PROTOTYPE:
1444	CODE:	1661	CODE:
1445	RETVAL = nreqs;	1662	RETVAL = eio_nreqs ();
1446	OUTPUT:	1663	OUTPUT:
1447	RETVAL	1664	RETVAL
1448		1665
		1666	int
		1667	nready ()
		1668	CODE:
		1669	RETVAL = eio_nready ();
		1670	OUTPUT:
		1671	RETVAL
		1672
		1673	int
		1674	npending ()
		1675	CODE:
		1676	RETVAL = eio_npending ();
		1677	OUTPUT:
		1678	RETVAL
		1679
		1680	int
		1681	nthreads ()
		1682	CODE:
		1683	RETVAL = eio_nthreads ();
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	int
		1688	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1689	CODE:
		1690	RETVAL = posix_fadvise (fh, offset, length, advice);
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	IV
		1695	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1696	CODE:
		1697	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	void
		1702	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1703	PPCODE:
		1704	sv_unmagic (scalar, MMAP_MAGIC);
		1705	{
		1706	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1707	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1708	if (addr == (void *)-1)
		1709	XSRETURN_NO;
		1710
		1711	sv_force_normal (scalar);
		1712
		1713	/* we store the length in mg_obj, as namlen is I32 :/ */
		1714	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1715	->mg_obj = (SV *)length;
		1716
		1717	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1718
		1719	if (!(prot & PROT_WRITE))
		1720	SvREADONLY_on (scalar);
		1721
		1722	if (SvLEN (scalar))
		1723	Safefree (SvPVX (scalar));
		1724
		1725	SvPVX (scalar) = (char *)addr;
		1726	SvCUR_set (scalar, length);
		1727	SvLEN_set (scalar, 0);
		1728	SvPOK_only (scalar);
		1729
		1730	XSRETURN_YES;
		1731	}
		1732
		1733	void
		1734	munmap (SV *scalar)
		1735	CODE:
		1736	sv_unmagic (scalar, MMAP_MAGIC);
		1737
		1738	int
		1739	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1740	ALIAS:
		1741	mprotect = 1
		1742	CODE:
		1743	{
		1744	STRLEN svlen;
		1745	void *addr = SvPVbyte (scalar, svlen);
		1746	size_t len = SvUV (length);
		1747
		1748	if (offset < 0)
		1749	offset += svlen;
		1750
		1751	if (offset < 0 || offset > svlen)
		1752	croak ("offset outside of scalar");
		1753
		1754	if (!SvOK (length) || len + offset > svlen)
		1755	len = svlen - offset;
		1756
		1757	addr = (void *)(((intptr_t)addr) + offset);
		1758	eio_page_align (&addr, &len);
		1759
		1760	switch (ix)
		1761	{
		1762	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1763	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1764	}
		1765	}
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769	int
		1770	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1771	CODE:
		1772	{
		1773	STRLEN svlen;
		1774	void *addr = SvPVbyte (scalar, svlen);
		1775	size_t len = SvUV (length);
		1776
		1777	if (offset < 0)
		1778	offset += svlen;
		1779
		1780	if (offset < 0 || offset > svlen)
		1781	croak ("offset outside of scalar");
		1782
		1783	if (!SvOK (length) || len + offset > svlen)
		1784	len = svlen - offset;
		1785
		1786	addr = (void *)(((intptr_t)addr) + offset);
		1787	eio_page_align (&addr, &len);
		1788	#if _POSIX_MEMLOCK_RANGE
		1789	RETVAL = munlock (addr, len);
		1790	#else
		1791	RETVAL = EIO_ENOSYS ();
		1792	#endif
		1793	}
		1794	OUTPUT:
		1795	RETVAL
		1796
		1797	int
		1798	munlockall ()
		1799	CODE:
		1800	#if _POSIX_MEMLOCK
		1801	munlockall ();
		1802	#else
		1803	RETVAL = EIO_ENOSYS ();
		1804	#endif
		1805	OUTPUT:
		1806	RETVAL
		1807
		1808	int
		1809	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1810	CODE:
		1811	{
		1812	#if HAVE_LINUX_SPLICE
		1813	loff_t off_in_, off_out_;
		1814	RETVAL = splice (
		1815	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1816	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1817	length, flags
		1818	);
		1819	#else
		1820	RETVAL = EIO_ENOSYS ();
		1821	#endif
		1822	}
		1823	OUTPUT:
		1824	RETVAL
		1825
		1826	int
		1827	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1828	CODE:
		1829	#if HAVE_LINUX_SPLICE
		1830	RETVAL = tee (rfh, wfh, length, flags);
		1831	#else
		1832	RETVAL = EIO_ENOSYS ();
		1833	#endif
		1834	OUTPUT:
		1835	RETVAL
		1836
		1837	void _on_next_submit (SV *cb)
		1838	CODE:
		1839	SvREFCNT_dec (on_next_submit);
		1840	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1841
1449	PROTOTYPES: DISABLE	1842	PROTOTYPES: DISABLE
		1843
		1844	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1845
		1846	BOOT:
		1847	{
		1848	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1849	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1850	}
		1851
		1852	void
		1853	DESTROY (SV *self)
		1854	CODE:
		1855	{
		1856	aio_wd wd = SvAIO_WD (self);
		1857	#if HAVE_AT
		1858	{
		1859	SV *callback = &PL_sv_undef;
		1860	dREQ; /* clobbers next_pri :/ */
		1861	next_pri = req->pri; /* restore next_pri */
		1862	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1863	req->type = EIO_WD_CLOSE;
		1864	req->wd = wd;
		1865	REQ_SEND;
		1866	}
		1867	#else
		1868	eio_wd_close_sync (wd);
		1869	#endif
		1870	}
1450		1871
1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1872	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452		1873
1453	void	1874	void
1454	cancel (aio_req_ornot req)	1875	cancel (aio_req_ornot req)
1455	CODE:	1876	CODE:
1456	req_cancel (req);	1877	eio_cancel (req);
1457		1878
1458	void	1879	void
1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1880	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1460	CODE:	1881	PPCODE:
		1882	{
		1883	if (GIMME_V != G_VOID)
		1884	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1885
		1886	if (items > 1)
		1887	{
		1888	SV *cb_cv =get_cb (callback);
		1889
1461	SvREFCNT_dec (req->callback);	1890	SvREFCNT_dec (req->callback);
1462	req->callback = newSVsv (callback);	1891	req->callback = SvREFCNT_inc (cb_cv);
		1892	}
		1893	}
1463		1894
1464	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1895	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1465		1896
1466	void	1897	void
1467	add (aio_req grp, ...)	1898	add (aio_req grp, ...)
1468	PPCODE:	1899	PPCODE:
1469	{	1900	{
1470	int i;	1901	int i;
1471	aio_req req;
1472		1902
1473	if (grp->fd == 2)	1903	if (grp->int1 == 2)
1474	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1904	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1475		1905
1476	for (i = 1; i < items; ++i )	1906	for (i = 1; i < items; ++i )
1477	{	1907	{
		1908	aio_req req;
		1909
1478	if (GIMME_V != G_VOID)	1910	if (GIMME_V != G_VOID)
1479	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1911	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1480		1912
1481	req = SvAIO_REQ (ST (i));	1913	req = SvAIO_REQ (ST (i));
1482		1914
1483	if (req)	1915	if (req)
1484	{	1916	eio_grp_add (grp, req);
1485	++grp->length;
1486	req->grp = grp;
1487
1488	req->grp_prev = 0;
1489	req->grp_next = grp->grp_first;
1490
1491	if (grp->grp_first)
1492	grp->grp_first->grp_prev = req;
1493
1494	grp->grp_first = req;
1495	}
1496	}	1917	}
1497	}	1918	}
		1919
		1920	void
		1921	cancel_subs (aio_req_ornot req)
		1922	CODE:
		1923	req_cancel_subs (req);
1498		1924
1499	void	1925	void
1500	result (aio_req grp, ...)	1926	result (aio_req grp, ...)
1501	CODE:	1927	CODE:
1502	{	1928	{
1503	int i;	1929	int i;
		1930	AV *av;
		1931
		1932	grp->errorno = errno;
		1933
1504	AV *av = newAV ();	1934	av = newAV ();
		1935	av_extend (av, items - 1);
1505		1936
1506	for (i = 1; i < items; ++i )	1937	for (i = 1; i < items; ++i )
1507	av_push (av, newSVsv (ST (i)));	1938	av_push (av, newSVsv (ST (i)));
1508		1939
1509	SvREFCNT_dec (grp->data);	1940	SvREFCNT_dec (grp->sv1);
1510	grp->data = (SV *)av;	1941	grp->sv1 = (SV *)av;
1511	}	1942	}
		1943
		1944	void
		1945	errno (aio_req grp, int errorno = errno)
		1946	CODE:
		1947	grp->errorno = errorno;
1512		1948
1513	void	1949	void
1514	limit (aio_req grp, int limit)	1950	limit (aio_req grp, int limit)
1515	CODE:	1951	CODE:
1516	grp->fd2 = limit;	1952	eio_grp_limit (grp, limit);
1517	aio_grp_feed (grp);
1518		1953
1519	void	1954	void
1520	feed (aio_req grp, SV *callback=&PL_sv_undef)	1955	feed (aio_req grp, SV *callback=&PL_sv_undef)
1521	CODE:	1956	CODE:
1522	{	1957	{
1523	SvREFCNT_dec (grp->fh2);	1958	SvREFCNT_dec (grp->sv2);
1524	grp->fh2 = newSVsv (callback);	1959	grp->sv2 = newSVsv (callback);
		1960	grp->feed = aio_grp_feed;
1525		1961
1526	if (grp->fd2 <= 0)	1962	if (grp->int2 <= 0)
1527	grp->fd2 = 2;	1963	grp->int2 = 2;
1528		1964
1529	aio_grp_feed (grp);	1965	eio_grp_limit (grp, grp->int2);
1530	}	1966	}
1531		1967

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