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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.82 by root, Fri Oct 27 20:11:58 2006 UTC vs.
Revision 1.223 by root, Tue Aug 28 03:13:33 2012 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
34	# if __linux	24	#if __linux__
		25	# include <linux/fs.h>
		26	# ifdef FS_IOC_FIEMAP
		27	# include <linux/types.h>
		28	# include <linux/fiemap.h>
		29	# define HAVE_FIEMAP 1
		30	# endif
		31	#endif
		32
		33	/* perl namespace pollution */
		34	#undef VERSION
		35
		36	/* perl stupidly overrides readdir and maybe others */
		37	/* with thread-unsafe versions, imagine that :( */
		38	#undef readdir
		39	#undef opendir
		40	#undef closedir
		41
		42	#ifdef _WIN32
		43
		44	// perl overrides all those nice libc functions
		45
		46	#undef malloc
		47	#undef free
		48	#undef open
		49	#undef read
		50	#undef write
		51	#undef send
		52	#undef recv
		53	#undef stat
		54	#undef lstat
		55	#undef fstat
		56	#undef truncate
		57	#undef ftruncate
		58	#undef open
		59	#undef link
		60	#undef close
		61	#undef unlink
		62	#undef mkdir
		63	#undef rmdir
		64	#undef rename
		65	#undef lseek
		66	#undef opendir
		67	#undef readdir
		68	#undef closedir
		69	#undef chmod
		70	#undef fchmod
		71	#undef dup
		72	#undef dup2
		73	#undef abort
		74	#undef pipe
		75
		76	#define EIO_STRUCT_STAT struct _stati64
		77	#define EIO_STRUCT_STATI64
		78
		79	#else
		80
		81	#include <sys/time.h>
35	# include <sys/sendfile.h>	82	#include <sys/select.h>
36	# elif __freebsd	83	#include <unistd.h>
37	# include <sys/socket.h>	84	#include <utime.h>
38	# include <sys/uio.h>	85	#include <signal.h>
39	# elif __hpux	86
40	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
41	# elif __solaris /* not yet */	88
42	# include <sys/sendfile.h>	89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	SV *sv3, *sv4; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/config.h"
		120	#include "libeio/eio.h"
		121
		122	static int req_invoke (eio_req *req);
		123	#define EIO_FINISH(req) req_invoke (req)
		124	static void req_destroy (eio_req *grp);
		125	#define EIO_DESTROY(req) req_destroy (req)
		126
		127	#include "libeio/eio.c"
		128
		129	#if !HAVE_POSIX_FADVISE
		130	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		131	#endif
		132
		133	#if !HAVE_POSIX_MADVISE
		134	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#ifndef MAP_ANONYMOUS
		138	# ifdef MAP_ANON
		139	# define MAP_ANONYMOUS MAP_ANON
43	# else	140	# else
44	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	142	# endif
46	#endif	143	#endif
47		144
48	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
49	#ifndef NAME_MAX	146	#include "def0.h"
50	# define NAME_MAX 4096
51	#endif
52		147
53	#ifndef PTHREAD_STACK_MIN	148	#ifndef makedev
54	/* care for broken platforms, e.g. windows */	149	# define makedev(maj,min) (((maj) << 8) | (min))
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif
65
66	/* wether word reads are potentially non-atomic.
67	* this is conservatice, likely most arches this runs
68	* on have atomic word read/writes.
69	*/
70	#ifndef WORDREAD_UNSAFE
71	# if __i386 || __x86_64
72	# define WORDREAD_UNSAFE 0
73	# else
74	# define WORDREAD_UNSAFE 1
75	# endif	150	#endif
		151	#ifndef major
		152	# define major(dev) ((dev) >> 8)
76	#endif	153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
77		157
78	/* buffer size for various temporary buffers */	158	#ifndef PAGESIZE
79	#define AIO_BUFSIZE 65536	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
80		161
81	#define dBUF \	162	/*****************************************************************************/
82	char *aio_buf; \	163
83	LOCK (wrklock); \	164	static void
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	165	fiemap (eio_req *req)
85	UNLOCK (wrklock); \	166	{
86	if (!aio_buf) \	167	req->result = -1;
		168
		169	#if HAVE_FIEMAP
		170	/* assume some c99 */
		171	struct fiemap *fiemap = 0;
		172	size_t end_offset;
		173	int count = req->int3;
		174
		175	req->flags |= EIO_FLAG_PTR1_FREE;
		176
		177	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		178	/* increase in 3.5kb steps */
		179	if (count < 0)
		180	count = 8;
		181
		182	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		183	errno = ENOMEM;
		184	if (!fiemap)
87	return -1;	185	return;
88		186
89	enum {	187	req->ptr1 = fiemap;
90	REQ_QUIT,
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_MKNOD, REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};
102		188
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	189	fiemap->fm_start = req->offs;
104	#define AIO_GRP_KLASS "IO::AIO::GRP"	190	fiemap->fm_length = req->size;
		191	fiemap->fm_flags = req->int2;
		192	fiemap->fm_extent_count = count;
105		193
106	typedef struct aio_cb	194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
107	{	195	return;
108	struct aio_cb *volatile next;
109		196
110	SV *data, *callback;	197	if (req->int3 >= 0 /* not autosizing */
111	SV *fh, *fh2;	198	|| !fiemap->fm_mapped_extents /* no more extents */
112	void *dataptr, *data2ptr;	199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
113	Stat_t *statdata;	200	goto done;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117		201
118	STRLEN dataoffset;	202	/* else we have to loop -
119	int type;	203	* it would be tempting (atcually I tried that first) to just query the
120	int fd, fd2;	204	* number of extents needed, but linux often feels like not returning all
121	int errorno;	205	* extents, without telling us it left any out. this complicates
122	mode_t mode; /* open */	206	* this quite a bit.
		207	*/
123		208
124	unsigned char flags;	209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
125	unsigned char pri;
126		210
127	SV *self; /* the perl counterpart of this request, if any */	211	for (;;)
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
129	} aio_cb;
130
131	enum {
132	FLAG_CANCELLED = 0x01,
133	};
134
135	typedef aio_cb *aio_req;
136	typedef aio_cb *aio_req_ornot;
137
138	enum {
139	PRI_MIN = -4,
140	PRI_MAX = 4,
141
142	DEFAULT_PRI = 0,
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150
151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153	#else
154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155	#endif
156
157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160	/* worker threads management */
161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163	typedef struct worker {
164	/* locked by wrklock */
165	struct worker *prev, *next;
166
167	pthread_t tid;
168
169	/* locked by reslock, reqlock or wrklock */
170	aio_req req; /* currently processed request */
171	void *dbuf;
172	DIR *dirp;
173	} worker;
174
175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177	static void worker_clear (worker *wrk)
178	{
179	if (wrk->dirp)
180	{	212	{
181	closedir (wrk->dirp);	213	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
182	wrk->dirp = 0;	214	char scratch[3072];
183	}	215	struct fiemap *incmap = (struct fiemap *)scratch;
184		216
185	if (wrk->dbuf)	217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
186	{	218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
187	free (wrk->dbuf);	219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
188	wrk->dbuf = 0;	220	incmap->fm_flags = fiemap->fm_flags;
189	}	221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
190	}
191		222
192	static void worker_free (worker *wrk)	223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
193	{
194	wrk->next->prev = wrk->prev;
195	wrk->prev->next = wrk->next;
196
197	free (wrk);
198	}
199
200	static volatile unsigned int nreqs, nready, npending;
201	static volatile unsigned int max_outstanding = 0xffffffff;
202	static int respipe [2];
203
204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
207
208	#if WORDREAD_UNSAFE
209
210	static unsigned int get_nready ()
211	{
212	unsigned int retval;
213
214	LOCK (reqlock);
215	retval = nready;
216	UNLOCK (reqlock);
217
218	return retval;
219	}
220
221	static unsigned int get_npending ()
222	{
223	unsigned int retval;
224
225	LOCK (reslock);
226	retval = npending;
227	UNLOCK (reslock);
228
229	return retval;
230	}
231
232	#else
233
234	# define get_nready() nready
235	# define get_npending() npending
236
237	#endif
238
239	/*
240	* a somewhat faster data structure might be nice, but
241	* with 8 priorities this actually needs <20 insns
242	* per shift, the most expensive operation.
243	*/
244	typedef struct {
245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246	int size;
247	} reqq;
248
249	static reqq req_queue;
250	static reqq res_queue;
251
252	int reqq_push (reqq *q, aio_req req)
253	{
254	int pri = req->pri;
255	req->next = 0;
256
257	if (q->qe[pri])
258	{
259	q->qe[pri]->next = req;
260	q->qe[pri] = req;
261	}
262	else
263	q->qe[pri] = q->qs[pri] = req;
264
265	return q->size++;
266	}
267
268	aio_req reqq_shift (reqq *q)
269	{
270	int pri;
271
272	if (!q->size)
273	return 0;	224	return;
274		225
275	--q->size;	226	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
276		227	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
277	for (pri = NUM_PRI; pri--; )	228	errno = ENOMEM;
278	{
279	aio_req req = q->qs[pri];
280
281	if (req)	229	if (!fiemap)
		230	return;
		231
		232	req->ptr1 = fiemap;
		233
		234	for (count = 0; count < incmap->fm_mapped_extents; ++count)
282	{	235	{
283	if (!(q->qs[pri] = req->next))	236	struct fiemap_extent *e = incmap->fm_extents + count;
284	q->qe[pri] = 0;
285		237
286	return req;	238	if (e->fe_logical + e->fe_length >= end_offset)
		239	goto done;
		240
		241	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		242
		243	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		244	goto done;
		245
287	}	246	}
288	}	247	}
289		248
290	abort ();	249	done:
291	}	250	req->result = 0;
292		251
293	static int poll_cb (int max);	252	#else
294	static void req_invoke (aio_req req);	253	errno = ENOSYS;
		254	#endif
		255	}
		256
		257	/*****************************************************************************/
		258
		259	enum {
		260	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		261	};
		262
		263	typedef eio_req *aio_req;
		264	typedef eio_req *aio_req_ornot;
		265	typedef eio_wd aio_wd;
		266
		267	static SV *on_next_submit;
		268	static int next_pri = EIO_PRI_DEFAULT;
		269	static int max_outstanding;
		270
		271	static s_epipe respipe;
		272
295	static void req_free (aio_req req);	273	static void req_destroy (aio_req req);
296	static void req_cancel (aio_req req);	274	static void req_cancel (aio_req req);
297		275
		276	static void
		277	want_poll (void)
		278	{
		279	/* write a dummy byte to the pipe so fh becomes ready */
		280	s_epipe_signal (&respipe);
		281	}
		282
		283	static void
		284	done_poll (void)
		285	{
		286	/* read any signals sent by the worker threads */
		287	s_epipe_drain (&respipe);
		288	}
		289
298	/* must be called at most once */	290	/* must be called at most once */
299	static SV *req_sv (aio_req req, const char *klass)	291	static SV *
		292	req_sv (aio_req req, HV *stash)
300	{	293	{
301	if (!req->self)	294	if (!req->self)
302	{	295	{
303	req->self = (SV *)newHV ();	296	req->self = (SV *)newHV ();
304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	297	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305	}	298	}
306		299
307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	300	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
308	}	301	}
309		302
310	static aio_req SvAIO_REQ (SV *sv)	303	static SV *
		304	newSVaio_wd (aio_wd wd)
		305	{
		306	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		307	}
		308
		309	static aio_req
		310	SvAIO_REQ (SV *sv)
311	{	311	{
312	MAGIC *mg;	312	MAGIC *mg;
313		313
314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	314	if (!SvROK (sv)
		315	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		316	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		317	&& SvSTASH (SvRV (sv)) != aio_req_stash
		318	&& !sv_derived_from (sv, "IO::AIO::REQ")))
315	croak ("object of class " AIO_REQ_KLASS " expected");	319	croak ("object of class IO::AIO::REQ expected");
316		320
317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318		322
319	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	324	}
321		325
		326	static aio_wd
		327	SvAIO_WD (SV *sv)
		328	{
		329	if (!SvROK (sv)
		330	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		331	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		332	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		333
		334	return (aio_wd)(long)SvIVX (SvRV (sv));
		335	}
		336
		337	static void
322	static void aio_grp_feed (aio_req grp)	338	aio_grp_feed (aio_req grp)
323	{	339	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	340	if (grp->sv2 && SvOK (grp->sv2))
325	{	341	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	342	dSP;
331		343
332	ENTER;	344	ENTER;
333	SAVETMPS;	345	SAVETMPS;
334	PUSHMARK (SP);	346	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	347	XPUSHs (req_sv (grp, aio_grp_stash));
336	PUTBACK;	348	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	349	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	350	SPAGAIN;
339	FREETMPS;	351	FREETMPS;
340	LEAVE;	352	LEAVE;
341	}
342
343	/* stop if no progress has been made */
344	if (old_len == grp->length)
345	{
346	SvREFCNT_dec (grp->fh2);
347	grp->fh2 = 0;
348	break;
349	}
350	}	353	}
351	}	354	}
352		355
353	static void aio_grp_dec (aio_req grp)	356	static void
		357	req_submit (eio_req *req)
354	{	358	{
355	--grp->length;	359	eio_submit (req);
356		360
357	/* call feeder, if applicable */	361	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	362	{
363	req_invoke (grp);	363	dSP;
364	req_free (grp);	364	SV *cb = sv_2mortal (on_next_submit);
		365
		366	on_next_submit = 0;
		367
		368	PUSHMARK (SP);
		369	PUTBACK;
		370	call_sv (cb, G_DISCARD | G_EVAL);
365	}	371	}
366	}	372	}
367		373
		374	static int
368	static void req_invoke (aio_req req)	375	req_invoke (eio_req *req)
369	{	376	{
370	dSP;	377	if (req->flags & FLAG_SV2_RO_OFF)
		378	SvREADONLY_off (req->sv2);
371		379
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	380	if (!EIO_CANCELLED (req) && req->callback)
373	{	381	{
		382	dSP;
		383	static SV *sv_result_cache; /* caches the result integer SV */
		384	SV *sv_result;
		385
374	ENTER;	386	ENTER;
375	SAVETMPS;	387	SAVETMPS;
376	PUSHMARK (SP);	388	PUSHMARK (SP);
377	EXTEND (SP, 1);	389	EXTEND (SP, 1);
378		390
		391	/* do not recreate the result IV from scratch each time */
		392	if (expect_true (sv_result_cache))
		393	{
		394	sv_result = sv_result_cache; sv_result_cache = 0;
		395	SvIV_set (sv_result, req->result);
		396	SvIOK_only (sv_result);
		397	}
		398	else
		399	{
		400	sv_result = newSViv (req->result);
		401	SvREADONLY_on (sv_result);
		402	}
		403
379	switch (req->type)	404	switch (req->type)
380	{	405	{
		406	case EIO_WD_OPEN:
		407	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		408	break;
		409
381	case REQ_READDIR:	410	case EIO_READDIR:
382	{	411	{
383	SV *rv = &PL_sv_undef;	412	SV *rv = &PL_sv_undef;
384		413
385	if (req->result >= 0)	414	if (req->result >= 0)
386	{	415	{
387	int i;	416	int i;
388	char *buf = req->data2ptr;	417	char *names = (char *)req->ptr2;
		418	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	419	AV *av = newAV ();
390		420
391	av_extend (av, req->result - 1);	421	av_extend (av, req->result - 1);
392		422
393	for (i = 0; i < req->result; ++i)	423	for (i = 0; i < req->result; ++i)
394	{	424	{
395	SV *sv = newSVpv (buf, 0);	425	if (req->int1 & EIO_READDIR_DENTS)
		426	{
		427	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		428
		429	if (req->int1 & EIO_READDIR_CUSTOM2)
		430	{
		431	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		432	AV *avent = newAV ();
		433
		434	av_extend (avent, 2);
		435
		436	if (!sv_type [ent->type])
		437	{
		438	sv_type [ent->type] = newSViv (ent->type);
		439	SvREADONLY_on (sv_type [ent->type]);
		440	}
		441
		442	av_store (avent, 0, namesv);
		443	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		444	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		445
		446	av_store (av, i, newRV_noinc ((SV *)avent));
		447	}
		448	else
397	av_store (av, i, sv);	449	av_store (av, i, namesv);
		450
		451	++ent;
		452	}
		453	else
		454	{
		455	SV *name = newSVpv (names, 0);
		456	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	457	names += SvCUR (name) + 1;
		458	}
399	}	459	}
400		460
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	461	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	462	}
403		463
404	PUSHs (rv);	464	PUSHs (rv);
		465
		466	if (req->int1 & EIO_READDIR_CUSTOM1)
		467	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	468	}
406	break;	469	break;
407		470
408	case REQ_OPEN:	471	case EIO_OPEN:
409	{	472	{
410	/* convert fd to fh */	473	/* convert fd to fh */
411	SV *fh;	474	SV *fh = &PL_sv_undef;
412		475
413	PUSHs (sv_2mortal (newSViv (req->result)));	476	if (req->result >= 0)
414	PUTBACK;	477	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	478	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	479	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		480	char sym [64];
		481	int symlen;
		482
		483	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		484	gv_init (gv, aio_stash, sym, symlen, 0);
417		485
418	fh = SvREFCNT_inc (POPs);	486	symlen = snprintf (
		487	sym,
		488	sizeof (sym),
		489	"%s&=%d",
		490	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		491	(int)req->result
		492	);
419		493
		494	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		495	fh = (SV *)gv;
		496	}
		497
420	PUSHMARK (SP);	498	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	499	}
423	break;	500	break;
424		501
		502	case EIO_STATVFS:
		503	case EIO_FSTATVFS:
		504	{
		505	SV *rv = &PL_sv_undef;
		506
		507	#ifndef _WIN32
		508	if (req->result >= 0)
		509	{
		510	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		511	HV *hv = newHV ();
		512
		513	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		514
		515	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		516	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		517	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		518	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		519	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		520	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		521	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		522	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		523	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		524	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		525	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		526	}
		527	#endif
		528
		529	PUSHs (rv);
		530	}
		531
		532	break;
		533
425	case REQ_GROUP:	534	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	535	req->int1 = 2; /* mark group as finished */
427		536
428	if (req->data)	537	if (req->sv1)
429	{	538	{
430	int i;	539	int i;
431	AV *av = (AV *)req->data;	540	AV *av = (AV *)req->sv1;
432		541
433	EXTEND (SP, AvFILL (av) + 1);	542	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	543	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	544	PUSHs (*av_fetch (av, i, 0));
436	}	545	}
437	break;	546	break;
438		547
439	case REQ_NOP:	548	case EIO_NOP:
440	case REQ_BUSY:	549	case EIO_BUSY:
441	break;	550	break;
442		551
		552	case EIO_READLINK:
		553	case EIO_REALPATH:
		554	if (req->result > 0)
		555	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		556	break;
		557
		558	case EIO_STAT:
		559	case EIO_LSTAT:
		560	case EIO_FSTAT:
		561	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		562
		563	if (!(PL_laststatval = req->result))
		564	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		565	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		566
		567	PUSHs (sv_result);
		568	break;
		569
		570	case EIO_SEEK:
		571	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		572	break;
		573
		574	case EIO_READ:
		575	{
		576	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		577	*SvEND (req->sv2) = 0;
		578	SvPOK_only (req->sv2);
		579	SvSETMAGIC (req->sv2);
		580	PUSHs (sv_result);
		581	}
		582	break;
		583
		584	case EIO_CUSTOM:
		585	if (req->feed == fiemap)
		586	{
		587	#if HAVE_FIEMAP
		588	if (!req->result)
		589	{
		590	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		591
		592	if (fiemap->fm_extent_count)
		593	{
		594	AV *av = newAV ();
		595	int i;
		596
		597	while (fiemap->fm_mapped_extents)
		598	{
		599	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		600	AV *ext_av = newAV ();
		601
		602	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		603	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		604	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		605	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		606
		607	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		608	}
		609
		610	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		611	}
		612	else
		613	{
		614	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		615	PUSHs (sv_result);
		616	}
		617	}
		618	#endif
		619	}
		620	else
		621	PUSHs (sv_result);
		622	break;
		623
		624	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		625	if (req->result > 0)
		626	SvIV_set (sv_result, 0);
		627	/* FALLTHROUGH */
		628
443	default:	629	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	630	PUSHs (sv_result);
445	break;	631	break;
446	}	632	}
447		633
448	errno = req->errorno;	634	errno = req->errorno;
449		635
450	PUTBACK;	636	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	637	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	638	SPAGAIN;
		639
		640	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		641	SvREFCNT_dec (sv_result);
		642	else
		643	sv_result_cache = sv_result;
453		644
454	FREETMPS;	645	FREETMPS;
455	LEAVE;	646	LEAVE;
		647
		648	PUTBACK;
456	}	649	}
457		650
458	if (req->grp)	651	return !!SvTRUE (ERRSV);
459	{
460	aio_req grp = req->grp;
461
462	/* unlink request */
463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466	if (grp->grp_first == req)
467	grp->grp_first = req->grp_next;
468
469	aio_grp_dec (grp);
470	}
471
472	if (SvTRUE (ERRSV))
473	{
474	req_free (req);
475	croak (0);
476	}
477	}	652	}
478		653
479	static void req_free (aio_req req)	654	static void
		655	req_destroy (aio_req req)
480	{	656	{
481	if (req->self)	657	if (req->self)
482	{	658	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	659	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	660	SvREFCNT_dec (req->self);
485	}	661	}
486		662
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	663	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	664	SvREFCNT_dec (req->sv2);
		665	SvREFCNT_dec (req->sv3);
		666	SvREFCNT_dec (req->sv4);
490	SvREFCNT_dec (req->callback);	667	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492		668
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495
496	Safefree (req);	669	free (req);
497	}	670	}
498		671
		672	static void
499	static void req_cancel_subs (aio_req grp)	673	req_cancel_subs (aio_req grp)
500	{	674	{
501	aio_req sub;
502
503	if (grp->type != REQ_GROUP)	675	if (grp->type != EIO_GROUP)
504	return;	676	return;
505		677
506	SvREFCNT_dec (grp->fh2);	678	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	679	grp->sv2 = 0;
508		680
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	681	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	682	}
512		683
513	static void req_cancel (aio_req req)	684	static void ecb_cold
		685	create_respipe (void)
514	{	686	{
515	req->flags |= FLAG_CANCELLED;	687	if (s_epipe_renew (&respipe))
516		688	croak ("IO::AIO: unable to initialize result pipe");
517	req_cancel_subs (req);
518	}	689	}
519		690
520	static void *aio_proc(void *arg);	691	static void
521		692	poll_wait (void)
522	static void start_thread (void)
523	{	693	{
524	sigset_t fullsigset, oldsigset;
525	pthread_attr_t attr;
526
527	worker *wrk = calloc (1, sizeof (worker));
528
529	if (!wrk)
530	croak ("unable to allocate worker thread data");
531
532	pthread_attr_init (&attr);
533	pthread_attr_setstacksize (&attr, STACKSIZE);
534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535	#ifdef PTHREAD_SCOPE_PROCESS
536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537	#endif
538
539	sigfillset (&fullsigset);
540
541	LOCK (wrklock);
542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
543
544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545	{
546	wrk->prev = &wrk_first;
547	wrk->next = wrk_first.next;
548	wrk_first.next->prev = wrk;
549	wrk_first.next = wrk;
550	++started;
551	}
552	else
553	free (wrk);
554
555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
556	UNLOCK (wrklock);
557	}
558
559	static void maybe_start_thread ()
560	{
561	#if 0
562	static struct timeval last;
563	struct timeval diff, now;
564	#endif
565
566	if (started >= wanted)
567	return;
568
569	if (nready <= nreqs - get_nready () - get_npending ())
570	return;
571
572	#if 0
573	gettimeofday (&now, 0);
574
575	diff.tv_sec = now.tv_sec - last.tv_sec;
576	diff.tv_usec = now.tv_usec - last.tv_usec;
577
578	if (diff.tv_usec < 0)
579	{
580	--diff.tv_sec;
581	diff.tv_usec += 1000000;
582	}
583
584	if (!diff.tv_sec && diff.tv_usec < 10000)
585	return;
586
587	last = now;
588	#endif
589
590	start_thread ();
591	}
592
593	static void req_send (aio_req req)
594	{
595	++nreqs;
596
597	LOCK (reqlock);
598	++nready;
599	reqq_push (&req_queue, req);
600	pthread_cond_signal (&reqwait);
601	UNLOCK (reqlock);
602
603	maybe_start_thread ();
604	}
605
606	static void end_thread (void)
607	{
608	aio_req req;
609
610	Newz (0, req, 1, aio_cb);
611
612	req->type = REQ_QUIT;
613	req->pri = PRI_MAX + PRI_BIAS;
614
615	req_send (req);
616
617	LOCK (wrklock);
618	--started;
619	UNLOCK (wrklock);
620	}
621
622	static void min_parallel (int nthreads)
623	{
624	if (wanted < nthreads)
625	wanted = nthreads;
626	}
627
628	static void max_parallel (int nthreads)
629	{
630	if (wanted > nthreads)
631	wanted = nthreads;
632
633	while (started > wanted)
634	end_thread ();
635	}
636
637	static void poll_wait ()
638	{
639	fd_set rfd;
640
641	while (nreqs)	694	while (eio_nreqs ())
642	{	695	{
643	int size;	696	int size;
644	if (WORDREAD_UNSAFE) LOCK (reslock);	697
		698	X_LOCK (reslock);
645	size = res_queue.size;	699	size = res_queue.size;
646	if (WORDREAD_UNSAFE) UNLOCK (reslock);	700	X_UNLOCK (reslock);
647		701
648	if (size)	702	if (size)
649	return;	703	return;
650		704
651	maybe_start_thread ();	705	etp_maybe_start_thread ();
652		706
653	FD_ZERO(&rfd);	707	s_epipe_wait (&respipe);
654	FD_SET(respipe [0], &rfd);
655
656	select (respipe [0] + 1, &rfd, 0, 0, 0);
657	}	708	}
658	}	709	}
659		710
660	static int poll_cb (int max)	711	static int
		712	poll_cb (void)
661	{	713	{
662	dSP;
663	int count = 0;
664	int do_croak = 0;
665	aio_req req;
666
667	for (;;)	714	for (;;)
668	{	715	{
669	while (max <= 0 || count < max)	716	int res = eio_poll ();
		717
		718	if (res > 0)
		719	croak (0);
		720
		721	if (!max_outstanding || max_outstanding > eio_nreqs ())
		722	return res;
		723
		724	poll_wait ();
		725	}
		726	}
		727
		728	static void ecb_cold
		729	reinit (void)
		730	{
		731	create_respipe ();
		732
		733	if (eio_init (want_poll, done_poll) < 0)
		734	croak ("IO::AIO: unable to initialise eio library");
		735	}
		736
		737	/*****************************************************************************/
		738
		739	#if !_POSIX_MAPPED_FILES
		740	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		741	# define munmap(addr,length) EIO_ENOSYS ()
		742	#endif
		743
		744	#if !_POSIX_MEMORY_PROTECTION
		745	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		746	# define PROT_NONE 0
		747	# define PROT_WRITE 0
		748	# define MAP_PRIVATE 0
		749	# define MAP_SHARED 0
		750	# define MAP_FIXED 0
		751	#endif
		752
		753	#define MMAP_MAGIC PERL_MAGIC_ext
		754
		755	static int ecb_cold
		756	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		757	{
		758	int old_errno = errno;
		759	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		760	errno = old_errno;
		761
		762	mg->mg_obj = 0; /* just in case */
		763
		764	SvREADONLY_off (sv);
		765
		766	if (SvPVX (sv) != mg->mg_ptr)
		767	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		768
		769	SvCUR_set (sv, 0);
		770	SvPVX (sv) = 0;
		771	SvOK_off (sv);
		772
		773	return 0;
		774	}
		775
		776	static MGVTBL mmap_vtbl = {
		777	0, 0, 0, 0, mmap_free
		778	};
		779
		780	/*****************************************************************************/
		781
		782	static SV *
		783	get_cb (SV *cb_sv)
		784	{
		785	SvGETMAGIC (cb_sv);
		786	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		787	}
		788
		789	static aio_req ecb_noinline
		790	dreq (SV *callback)
		791	{
		792	SV *cb_cv;
		793	aio_req req;
		794	int req_pri = next_pri;
		795	next_pri = EIO_PRI_DEFAULT;
		796
		797	cb_cv = get_cb (callback);
		798
		799	req = calloc (sizeof (*req), 1);
		800	if (!req)
		801	croak ("out of memory during eio_req allocation");
		802
		803	req->callback = SvREFCNT_inc (cb_cv);
		804	req->pri = req_pri;
		805
		806	return req;
		807	}
		808
		809	#define dREQ \
		810	aio_req req = dreq (callback); \
		811
		812	#define REQ_SEND \
		813	PUTBACK; \
		814	req_submit (req); \
		815	SPAGAIN; \
		816	\
		817	if (GIMME_V != G_VOID) \
		818	XPUSHs (req_sv (req, aio_req_stash));
		819
		820	ecb_inline void
		821	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		822	{
		823	if (expect_false (SvROK (path)))
		824	{
		825	SV *rv = SvRV (path);
		826	SV *wdob;
		827
		828	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
670	{	829	{
671	maybe_start_thread ();	830	path = AvARRAY (rv)[1];
		831	wdob = AvARRAY (rv)[0];
672		832
673	LOCK (reslock);	833	if (SvOK (wdob))
674	req = reqq_shift (&res_queue);
675
676	if (req)
677	{	834	{
678	--npending;	835	*wd = SvAIO_WD (wdob);
679		836	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
680	if (!res_queue.size)
681	{
682	/* read any signals sent by the worker threads */
683	char buf [32];
684	while (read (respipe [0], buf, 32) == 32)
685	;
686	}
687	}
688
689	UNLOCK (reslock);
690
691	if (!req)
692	break;
693
694	--nreqs;
695
696	if (req->type == REQ_GROUP && req->length)
697	{
698	req->fd = 1; /* mark request as delayed */
699	continue;
700	}	837	}
701	else	838	else
702	{	839	*wd = EIO_INVALID_WD;
703	if (req->type == REQ_READ)
704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
705
706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
707	SvREADONLY_off (req->data);
708
709	if (req->statdata)
710	{
711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
712	PL_laststatval = req->result;
713	PL_statcache = *(req->statdata);
714	}
715
716	req_invoke (req);
717
718	count++;
719	}
720
721	req_free (req);
722	}	840	}
		841	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		842	{
		843	*wd = (aio_wd)(long)SvIVX (rv);
		844	*wdsv = SvREFCNT_inc_NN (rv);
		845	*ptr = ".";
		846	return; /* path set to "." */
		847	}
		848	else
		849	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		850	}
723		851
724	if (nreqs <= max_outstanding)	852	*pathsv = newSVsv (path);
		853	*ptr = SvPVbyte_nolen (*pathsv);
		854	}
		855
		856	static void ecb_noinline
		857	req_set_path1 (aio_req req, SV *path)
		858	{
		859	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		860	}
		861
		862	static void ecb_noinline
		863	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		864	{
		865	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		866
		867	switch (SvTYPE (rv))
		868	{
		869	case SVt_PVIO:
		870	case SVt_PVLV:
		871	case SVt_PVGV:
		872	req->type = type_fh;
		873	req->sv1 = newSVsv (fh_or_path);
		874	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
725	break;	875	break;
726		876
727	poll_wait ();	877	default:
728		878	req->type = type_path;
729	max = 0;	879	req_set_path1 (req, fh_or_path);
		880	break;
730	}	881	}
731
732	return count;
733	}	882	}
734		883
735	static void create_pipe ()	884	XS(boot_IO__AIO) ecb_cold;
736	{
737	if (pipe (respipe))
738	croak ("unable to initialize result pipe");
739		885
740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
741	croak ("cannot set result pipe to nonblocking mode");
742
743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
744	croak ("cannot set result pipe to nonblocking mode");
745	}
746
747	/*****************************************************************************/
748	/* work around various missing functions */
749
750	#if !HAVE_PREADWRITE
751	# define pread aio_pread
752	# define pwrite aio_pwrite
753
754	/*
755	* make our pread/pwrite safe against themselves, but not against
756	* normal read/write by using a mutex. slows down execution a lot,
757	* but that's your problem, not mine.
758	*/
759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
760
761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = read (fd, buf, count);
770	lseek (fd, ooffset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775
776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
777	{
778	ssize_t res;
779	off_t ooffset;
780
781	LOCK (preadwritelock);
782	ooffset = lseek (fd, 0, SEEK_CUR);
783	lseek (fd, offset, SEEK_SET);
784	res = write (fd, buf, count);
785	lseek (fd, offset, SEEK_SET);
786	UNLOCK (preadwritelock);
787
788	return res;
789	}
790	#endif
791
792	#if !HAVE_FDATASYNC
793	# define fdatasync fsync
794	#endif
795
796	#if !HAVE_READAHEAD
797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
798
799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
800	{
801	dBUF;
802
803	while (count > 0)
804	{
805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
806
807	pread (fd, aio_buf, len, offset);
808	offset += len;
809	count -= len;
810	}
811
812	errno = 0;
813	}
814
815	#endif
816
817	#if !HAVE_READDIR_R
818	# define readdir_r aio_readdir_r
819
820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
821
822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
823	{
824	struct dirent *e;
825	int errorno;
826
827	LOCK (readdirlock);
828
829	e = readdir (dirp);
830	errorno = errno;
831
832	if (e)
833	{
834	*res = ent;
835	strcpy (ent->d_name, e->d_name);
836	}
837	else
838	*res = 0;
839
840	UNLOCK (readdirlock);
841
842	errno = errorno;
843	return e ? 0 : -1;
844	}
845	#endif
846
847	/* sendfile always needs emulation */
848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
849	{
850	ssize_t res;
851
852	if (!count)
853	return 0;
854
855	#if HAVE_SENDFILE
856	# if __linux
857	res = sendfile (ofd, ifd, &offset, count);
858
859	# elif __freebsd
860	/*
861	* Of course, the freebsd sendfile is a dire hack with no thoughts
862	* wasted on making it similar to other I/O functions.
863	*/
864	{
865	off_t sbytes;
866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
867
868	if (res < 0 && sbytes)
869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870	res = sbytes;
871	}
872
873	# elif __hpux
874	res = sendfile (ofd, ifd, offset, count, 0, 0);
875
876	# elif __solaris
877	{
878	struct sendfilevec vec;
879	size_t sbytes;
880
881	vec.sfv_fd = ifd;
882	vec.sfv_flag = 0;
883	vec.sfv_off = offset;
884	vec.sfv_len = count;
885
886	res = sendfilev (ofd, &vec, 1, &sbytes);
887
888	if (res < 0 && sbytes)
889	res = sbytes;
890	}
891
892	# endif
893	#else
894	res = -1;
895	errno = ENOSYS;
896	#endif
897
898	if (res < 0
899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
900	#if __solaris
901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
902	#endif
903	)
904	)
905	{
906	/* emulate sendfile. this is a major pain in the ass */
907	dBUF;
908
909	res = 0;
910
911	while (count)
912	{
913	ssize_t cnt;
914
915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
916
917	if (cnt <= 0)
918	{
919	if (cnt && !res) res = -1;
920	break;
921	}
922
923	cnt = write (ofd, aio_buf, cnt);
924
925	if (cnt <= 0)
926	{
927	if (cnt && !res) res = -1;
928	break;
929	}
930
931	offset += cnt;
932	res += cnt;
933	count -= cnt;
934	}
935	}
936
937	return res;
938	}
939
940	/* read a full directory */
941	static void scandir_ (aio_req req, worker *self)
942	{
943	DIR *dirp;
944	union
945	{
946	struct dirent d;
947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
948	} *u;
949	struct dirent *entp;
950	char *name, *names;
951	int memlen = 4096;
952	int memofs = 0;
953	int res = 0;
954	int errorno;
955
956	LOCK (wrklock);
957	self->dirp = dirp = opendir (req->dataptr);
958	self->dbuf = u = malloc (sizeof (*u));
959	req->data2ptr = names = malloc (memlen);
960	UNLOCK (wrklock);
961
962	if (dirp && u && names)
963	for (;;)
964	{
965	errno = 0;
966	readdir_r (dirp, &u->d, &entp);
967
968	if (!entp)
969	break;
970
971	name = entp->d_name;
972
973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
974	{
975	int len = strlen (name) + 1;
976
977	res++;
978
979	while (memofs + len > memlen)
980	{
981	memlen *= 2;
982	LOCK (wrklock);
983	req->data2ptr = names = realloc (names, memlen);
984	UNLOCK (wrklock);
985
986	if (!names)
987	break;
988	}
989
990	memcpy (names + memofs, name, len);
991	memofs += len;
992	}
993	}
994
995	if (errno)
996	res = -1;
997
998	req->result = res;
999	}
1000
1001	/*****************************************************************************/
1002
1003	static void *aio_proc (void *thr_arg)
1004	{
1005	aio_req req;
1006	worker *self = (worker *)thr_arg;
1007
1008	for (;;)
1009	{
1010	LOCK (reqlock);
1011
1012	for (;;)
1013	{
1014	self->req = req = reqq_shift (&req_queue);
1015
1016	if (req)
1017	break;
1018
1019	pthread_cond_wait (&reqwait, &reqlock);
1020	}
1021
1022	--nready;
1023
1024	UNLOCK (reqlock);
1025
1026	errno = 0; /* strictly unnecessary */
1027
1028	if (!(req->flags & FLAG_CANCELLED))
1029	switch (req->type)
1030	{
1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1033
1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1036
1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1040
1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1042	case REQ_CLOSE: req->result = close (req->fd); break;
1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1049
1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
1052	case REQ_READDIR: scandir_ (req, self); break;
1053
1054	case REQ_BUSY:
1055	{
1056	struct timeval tv;
1057
1058	tv.tv_sec = req->fd;
1059	tv.tv_usec = req->fd2;
1060
1061	req->result = select (0, 0, 0, 0, &tv);
1062	}
1063
1064	case REQ_GROUP:
1065	case REQ_NOP:
1066	break;
1067
1068	case REQ_QUIT:
1069	LOCK (wrklock);
1070	worker_free (self);
1071	--started;
1072	UNLOCK (wrklock);
1073	return 0;
1074
1075	default:
1076	req->result = ENOSYS;
1077	break;
1078	}
1079
1080	req->errorno = errno;
1081
1082	LOCK (reslock);
1083
1084	++npending;
1085
1086	if (!reqq_push (&res_queue, req))
1087	/* write a dummy byte to the pipe so fh becomes ready */
1088	write (respipe [1], &respipe, 1);
1089
1090	self->req = 0;
1091	worker_clear (self);
1092
1093	UNLOCK (reslock);
1094	}
1095	}
1096
1097	/*****************************************************************************/
1098
1099	static void atfork_prepare (void)
1100	{
1101	LOCK (wrklock);
1102	LOCK (reqlock);
1103	LOCK (reslock);
1104	#if !HAVE_PREADWRITE
1105	LOCK (preadwritelock);
1106	#endif
1107	#if !HAVE_READDIR_R
1108	LOCK (readdirlock);
1109	#endif
1110	}
1111
1112	static void atfork_parent (void)
1113	{
1114	#if !HAVE_READDIR_R
1115	UNLOCK (readdirlock);
1116	#endif
1117	#if !HAVE_PREADWRITE
1118	UNLOCK (preadwritelock);
1119	#endif
1120	UNLOCK (reslock);
1121	UNLOCK (reqlock);
1122	UNLOCK (wrklock);
1123	}
1124
1125	static void atfork_child (void)
1126	{
1127	aio_req prv;
1128
1129	while (prv = reqq_shift (&req_queue))
1130	req_free (prv);
1131
1132	while (prv = reqq_shift (&res_queue))
1133	req_free (prv);
1134
1135	while (wrk_first.next != &wrk_first)
1136	{
1137	worker *wrk = wrk_first.next;
1138
1139	if (wrk->req)
1140	req_free (wrk->req);
1141
1142	worker_clear (wrk);
1143	worker_free (wrk);
1144	}
1145
1146	started = 0;
1147	nreqs = 0;
1148
1149	close (respipe [0]);
1150	close (respipe [1]);
1151	create_pipe ();
1152
1153	atfork_parent ();
1154	}
1155
1156	#define dREQ \
1157	aio_req req; \
1158	int req_pri = next_pri; \
1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
1160	\
1161	if (SvOK (callback) && !SvROK (callback)) \
1162	croak ("callback must be undef or of reference type"); \
1163	\
1164	Newz (0, req, 1, aio_cb); \
1165	if (!req) \
1166	croak ("out of memory during aio_req allocation"); \
1167	\
1168	req->callback = newSVsv (callback); \
1169	req->pri = req_pri
1170
1171	#define REQ_SEND \
1172	req_send (req); \
1173	\
1174	if (GIMME_V != G_VOID) \
1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1176
1177	MODULE = IO::AIO PACKAGE = IO::AIO	886	MODULE = IO::AIO PACKAGE = IO::AIO
1178		887
1179	PROTOTYPES: ENABLE	888	PROTOTYPES: ENABLE
1180		889
1181	BOOT:	890	BOOT:
1182	{	891	{
		892	static const struct {
		893	const char *name;
		894	IV iv;
		895	} *civ, const_iv[] = {
		896	# define const_niv(name, value) { # name, (IV) value },
		897	# define const_iv(name) { # name, (IV) name },
		898	# define const_eio(name) { # name, (IV) EIO_ ## name },
		899
		900	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		901
		902	const_iv (ENOSYS)
		903	const_iv (EXDEV)
		904	const_iv (EBADR)
		905
		906	const_iv (O_RDONLY)
		907	const_iv (O_WRONLY)
		908	const_iv (O_RDWR)
		909	const_iv (O_CREAT)
		910	const_iv (O_TRUNC)
		911	const_iv (O_EXCL)
		912	const_iv (O_APPEND)
		913
		914	const_iv (O_ASYNC)
		915	const_iv (O_DIRECT)
		916	const_iv (O_NOATIME)
		917
		918	const_iv (O_CLOEXEC)
		919	const_iv (O_NOCTTY)
		920	const_iv (O_NOFOLLOW)
		921	const_iv (O_NONBLOCK)
		922	const_iv (O_EXEC)
		923	const_iv (O_SEARCH)
		924	const_iv (O_DIRECTORY)
		925	const_iv (O_DSYNC)
		926	const_iv (O_RSYNC)
		927	const_iv (O_SYNC)
		928	const_iv (O_TTY_INIT)
		929
		930	const_iv (S_IFIFO)
		931	const_iv (S_IFCHR)
		932	const_iv (S_IFBLK)
		933	const_iv (S_IFLNK)
		934	const_iv (S_IFREG)
		935	const_iv (S_IFDIR)
		936	const_iv (S_IFWHT)
		937	const_iv (S_IFSOCK)
		938	const_iv (S_IFMT)
		939
		940	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		941	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		942	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		943	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		944	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		945	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		946
		947	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		948	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		949	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		950	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		951	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		952
		953	const_iv (ST_RDONLY)
		954	const_iv (ST_NOSUID)
		955	const_iv (ST_NODEV)
		956	const_iv (ST_NOEXEC)
		957	const_iv (ST_SYNCHRONOUS)
		958	const_iv (ST_MANDLOCK)
		959	const_iv (ST_WRITE)
		960	const_iv (ST_APPEND)
		961	const_iv (ST_IMMUTABLE)
		962	const_iv (ST_NOATIME)
		963	const_iv (ST_NODIRATIME)
		964	const_iv (ST_RELATIME)
		965
		966	const_iv (PROT_NONE)
		967	const_iv (PROT_EXEC)
		968	const_iv (PROT_READ)
		969	const_iv (PROT_WRITE)
		970
		971	/*const_iv (MAP_FIXED)*/
		972	const_iv (MAP_PRIVATE)
		973	const_iv (MAP_SHARED)
		974	const_iv (MAP_ANONYMOUS)
		975
		976	/* linuxish */
		977	const_iv (MAP_HUGETLB)
		978	const_iv (MAP_LOCKED)
		979	const_iv (MAP_NORESERVE)
		980	const_iv (MAP_POPULATE)
		981	const_iv (MAP_NONBLOCK)
		982
		983	const_iv (FIEMAP_FLAG_SYNC)
		984	const_iv (FIEMAP_FLAG_XATTR)
		985	const_iv (FIEMAP_FLAGS_COMPAT)
		986	const_iv (FIEMAP_EXTENT_LAST)
		987	const_iv (FIEMAP_EXTENT_UNKNOWN)
		988	const_iv (FIEMAP_EXTENT_DELALLOC)
		989	const_iv (FIEMAP_EXTENT_ENCODED)
		990	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		991	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		992	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		993	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		994	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		995	const_iv (FIEMAP_EXTENT_MERGED)
		996	const_iv (FIEMAP_EXTENT_SHARED)
		997
		998	const_iv (SPLICE_F_MOVE)
		999	const_iv (SPLICE_F_NONBLOCK)
		1000	const_iv (SPLICE_F_MORE)
		1001	const_iv (SPLICE_F_GIFT)
		1002
		1003	const_iv (SEEK_DATA)
		1004	const_iv (SEEK_HOLE)
		1005
		1006	/* libeio constants */
		1007	const_eio (SEEK_SET)
		1008	const_eio (SEEK_CUR)
		1009	const_eio (SEEK_END)
		1010
		1011	const_eio (MCL_FUTURE)
		1012	const_eio (MCL_CURRENT)
		1013
		1014	const_eio (MS_ASYNC)
		1015	const_eio (MS_INVALIDATE)
		1016	const_eio (MS_SYNC)
		1017
		1018	const_eio (MT_MODIFY)
		1019
		1020	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1021	const_eio (SYNC_FILE_RANGE_WRITE)
		1022	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1023
		1024	const_eio (FALLOC_FL_KEEP_SIZE)
		1025	const_eio (FALLOC_FL_PUNCH_HOLE)
		1026
		1027	const_eio (READDIR_DENTS)
		1028	const_eio (READDIR_DIRS_FIRST)
		1029	const_eio (READDIR_STAT_ORDER)
		1030	const_eio (READDIR_FOUND_UNKNOWN)
		1031
		1032	const_eio (DT_UNKNOWN)
		1033	const_eio (DT_FIFO)
		1034	const_eio (DT_CHR)
		1035	const_eio (DT_DIR)
		1036	const_eio (DT_BLK)
		1037	const_eio (DT_REG)
		1038	const_eio (DT_LNK)
		1039	const_eio (DT_SOCK)
		1040	const_eio (DT_WHT)
		1041	};
		1042
1183	HV *stash = gv_stashpv ("IO::AIO", 1);	1043	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1044	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1045	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1046	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1184		1047
1185	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1048	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1186	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1049	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1187	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1188	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1189	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1190	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1191		1050
1192	create_pipe ();	1051	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1193	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1194		1052
1195	start_thread ();	1053	reinit ();
1196	}	1054	}
1197		1055
1198	void	1056	void
1199	min_parallel (int nthreads)	1057	reinit ()
1200	PROTOTYPE: $	1058	PROTOTYPE:
1201		1059
1202	void	1060	void
1203	max_parallel (int nthreads)	1061	max_poll_reqs (unsigned int nreqs)
1204	PROTOTYPE: $
1205
1206	int
1207	max_outstanding (int maxreqs)
1208	PROTOTYPE: $	1062	PROTOTYPE: $
1209	CODE:	1063	CODE:
1210	RETVAL = max_outstanding;	1064	eio_set_max_poll_reqs (nreqs);
		1065
		1066	void
		1067	max_poll_time (double nseconds)
		1068	PROTOTYPE: $
		1069	CODE:
		1070	eio_set_max_poll_time (nseconds);
		1071
		1072	void
		1073	min_parallel (unsigned int nthreads)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_min_parallel (nthreads);
		1077
		1078	void
		1079	max_parallel (unsigned int nthreads)
		1080	PROTOTYPE: $
		1081	CODE:
		1082	eio_set_max_parallel (nthreads);
		1083
		1084	void
		1085	max_idle (unsigned int nthreads)
		1086	PROTOTYPE: $
		1087	CODE:
		1088	eio_set_max_idle (nthreads);
		1089
		1090	void
		1091	idle_timeout (unsigned int seconds)
		1092	PROTOTYPE: $
		1093	CODE:
		1094	eio_set_idle_timeout (seconds);
		1095
		1096	void
		1097	max_outstanding (unsigned int maxreqs)
		1098	PROTOTYPE: $
		1099	CODE:
1211	max_outstanding = maxreqs;	1100	max_outstanding = maxreqs;
1212	OUTPUT:
1213	RETVAL
1214		1101
1215	void	1102	void
1216	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1103	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1217	SV * pathname
1218	int flags
1219	int mode
1220	SV * callback
1221	PROTOTYPE: $$$;$
1222	PPCODE:	1104	PPCODE:
1223	{	1105	{
1224	dREQ;	1106	dREQ;
1225		1107
1226	req->type = REQ_OPEN;	1108	req->type = EIO_WD_OPEN;
1227	req->data = newSVsv (pathname);	1109	req_set_path1 (req, pathname);
1228	req->dataptr = SvPVbyte_nolen (req->data);
1229	req->fd = flags;
1230	req->mode = mode;
1231		1110
1232	REQ_SEND;	1111	REQ_SEND;
1233	}	1112	}
1234		1113
1235	void	1114	void
		1115	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->type = EIO_OPEN;
		1121	req_set_path1 (req, pathname);
		1122	req->int1 = flags;
		1123	req->int2 = mode;
		1124
		1125	REQ_SEND;
		1126	}
		1127
		1128	void
1236	aio_close (fh,callback=&PL_sv_undef)	1129	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1237	SV * fh
1238	SV * callback
1239	PROTOTYPE: $;$
1240	ALIAS:	1130	ALIAS:
1241	aio_close = REQ_CLOSE
1242	aio_fsync = REQ_FSYNC	1131	aio_fsync = EIO_FSYNC
1243	aio_fdatasync = REQ_FDATASYNC	1132	aio_fdatasync = EIO_FDATASYNC
		1133	aio_syncfs = EIO_SYNCFS
1244	PPCODE:	1134	PPCODE:
1245	{	1135	{
		1136	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	1137	dREQ;
1247		1138
1248	req->type = ix;	1139	req->type = ix;
1249	req->fh = newSVsv (fh);	1140	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1141	req->int1 = fd;
1251		1142
1252	REQ_SEND (req);	1143	REQ_SEND;
1253	}	1144	}
1254		1145
1255	void	1146	void
		1147	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1148	PPCODE:
		1149	{
		1150	int fd = s_fileno_croak (fh, 0);
		1151	dREQ;
		1152
		1153	req->type = EIO_SYNC_FILE_RANGE;
		1154	req->sv1 = newSVsv (fh);
		1155	req->int1 = fd;
		1156	req->offs = offset;
		1157	req->size = nbytes;
		1158	req->int2 = flags;
		1159
		1160	REQ_SEND;
		1161	}
		1162
		1163	void
		1164	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1165	PPCODE:
		1166	{
		1167	int fd = s_fileno_croak (fh, 0);
		1168	dREQ;
		1169
		1170	req->type = EIO_FALLOCATE;
		1171	req->sv1 = newSVsv (fh);
		1172	req->int1 = fd;
		1173	req->int2 = mode;
		1174	req->offs = offset;
		1175	req->size = len;
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1185	int fd = s_fileno_croak (fh, 0);
		1186	dREQ;
		1187
		1188	if (expect_false (close_fd < 0))
		1189	{
		1190	int pipefd [2];
		1191
		1192	if (
		1193	#ifdef _WIN32
		1194	_pipe (pipefd, 1, _O_BINARY) < 0
		1195	#else
		1196	pipe (pipefd) < 0
		1197	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1198	#endif
		1199	|| close (pipefd [1]) < 0
		1200	)
		1201	abort (); /*D*/
		1202
		1203	close_fd = pipefd [0];
		1204	}
		1205
		1206	req->type = EIO_DUP2;
		1207	req->int1 = close_fd;
		1208	req->sv2 = newSVsv (fh);
		1209	req->int2 = fd;
		1210
		1211	REQ_SEND;
		1212	}
		1213
		1214	void
		1215	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1216	PPCODE:
		1217	{
		1218	int fd = s_fileno_croak (fh, 0);
		1219	dREQ;
		1220
		1221	req->type = EIO_SEEK;
		1222	req->sv1 = newSVsv (fh);
		1223	req->int1 = fd;
		1224	req->offs = SvVAL64 (offset);
		1225	req->int2 = whence;
		1226
		1227	REQ_SEND;
		1228	}
		1229
		1230	void
1256	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1231	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1257	SV * fh
1258	UV offset
1259	UV length
1260	SV * data
1261	UV dataoffset
1262	SV * callback
1263	ALIAS:	1232	ALIAS:
1264	aio_read = REQ_READ	1233	aio_read = EIO_READ
1265	aio_write = REQ_WRITE	1234	aio_write = EIO_WRITE
1266	PROTOTYPE: $$$$$;$
1267	PPCODE:	1235	PPCODE:
1268	{	1236	{
1269	aio_req req;
1270	STRLEN svlen;	1237	STRLEN svlen;
		1238	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1271	char *svptr = SvPVbyte (data, svlen);	1239	char *svptr = SvPVbyte (data, svlen);
1272		1240	UV len = SvUV (length);
1273	SvUPGRADE (data, SVt_PV);
1274	SvPOK_on (data);
1275		1241
1276	if (dataoffset < 0)	1242	if (dataoffset < 0)
1277	dataoffset += svlen;	1243	dataoffset += svlen;
1278		1244
1279	if (dataoffset < 0 || dataoffset > svlen)	1245	if (dataoffset < 0 || dataoffset > svlen)
1280	croak ("data offset outside of string");	1246	croak ("dataoffset outside of data scalar");
1281		1247
1282	if (ix == REQ_WRITE)	1248	if (ix == EIO_WRITE)
1283	{	1249	{
1284	/* write: check length and adjust. */	1250	/* write: check length and adjust. */
1285	if (length < 0 || length + dataoffset > svlen)	1251	if (!SvOK (length) || len + dataoffset > svlen)
1286	length = svlen - dataoffset;	1252	len = svlen - dataoffset;
1287	}	1253	}
1288	else	1254	else
1289	{	1255	{
1290	/* read: grow scalar as necessary */	1256	/* read: check type and grow scalar as necessary */
		1257	SvUPGRADE (data, SVt_PV);
		1258	if (SvLEN (data) >= SvCUR (data))
1291	svptr = SvGROW (data, length + dataoffset);	1259	svptr = SvGROW (data, len + dataoffset + 1);
		1260	else if (SvCUR (data) < len + dataoffset)
		1261	croak ("length + dataoffset outside of scalar, and cannot grow");
1292	}	1262	}
1293
1294	if (length < 0)
1295	croak ("length must not be negative");
1296		1263
1297	{	1264	{
1298	dREQ;	1265	dREQ;
1299		1266
1300	req->type = ix;	1267	req->type = ix;
1301	req->fh = newSVsv (fh);	1268	req->sv1 = newSVsv (fh);
1302	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1269	req->int1 = fd;
1303	: IoOFP (sv_2io (fh)));	1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1304	req->offset = offset;	1271	req->size = len;
1305	req->length = length;
1306	req->data = SvREFCNT_inc (data);	1272	req->sv2 = SvREFCNT_inc (data);
1307	req->dataptr = (char *)svptr + dataoffset;	1273	req->ptr2 = (char *)svptr + dataoffset;
		1274	req->stroffset = dataoffset;
1308		1275
1309	if (!SvREADONLY (data))	1276	if (!SvREADONLY (data))
1310	{	1277	{
1311	SvREADONLY_on (data);	1278	SvREADONLY_on (data);
1312	req->data2ptr = (void *)data;	1279	req->flags |= FLAG_SV2_RO_OFF;
1313	}	1280	}
1314		1281
1315	REQ_SEND;	1282	REQ_SEND;
1316	}	1283	}
1317	}	1284	}
1318		1285
1319	void	1286	void
1320	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1287	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1321	SV * out_fh	1288	ALIAS:
1322	SV * in_fh	1289	aio_readlink = EIO_READLINK
1323	UV in_offset	1290	aio_realpath = EIO_REALPATH
1324	UV length
1325	SV * callback
1326	PROTOTYPE: $$$$;$
1327	PPCODE:	1291	PPCODE:
1328	{	1292	{
		1293	dREQ;
		1294
		1295	req->type = ix;
		1296	req_set_path1 (req, pathname);
		1297
		1298	REQ_SEND;
		1299	}
		1300
		1301	void
		1302	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1303	PPCODE:
		1304	{
		1305	int ifd = s_fileno_croak (in_fh , 0);
		1306	int ofd = s_fileno_croak (out_fh, 1);
1329	dREQ;	1307	dREQ;
1330		1308
1331	req->type = REQ_SENDFILE;	1309	req->type = EIO_SENDFILE;
1332	req->fh = newSVsv (out_fh);	1310	req->sv1 = newSVsv (out_fh);
1333	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1311	req->int1 = ofd;
1334	req->fh2 = newSVsv (in_fh);	1312	req->sv2 = newSVsv (in_fh);
1335	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1313	req->int2 = ifd;
1336	req->offset = in_offset;	1314	req->offs = in_offset;
1337	req->length = length;	1315	req->size = length;
1338		1316
1339	REQ_SEND;	1317	REQ_SEND;
1340	}	1318	}
1341		1319
1342	void	1320	void
1343	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1321	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1344	SV * fh
1345	UV offset
1346	IV length
1347	SV * callback
1348	PROTOTYPE: $$$;$
1349	PPCODE:	1322	PPCODE:
1350	{	1323	{
		1324	int fd = s_fileno_croak (fh, 0);
1351	dREQ;	1325	dREQ;
1352		1326
1353	req->type = REQ_READAHEAD;	1327	req->type = EIO_READAHEAD;
1354	req->fh = newSVsv (fh);	1328	req->sv1 = newSVsv (fh);
1355	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1329	req->int1 = fd;
1356	req->offset = offset;	1330	req->offs = offset;
1357	req->length = length;	1331	req->size = length;
1358		1332
1359	REQ_SEND;	1333	REQ_SEND;
1360	}	1334	}
1361		1335
1362	void	1336	void
1363	aio_stat (fh_or_path,callback=&PL_sv_undef)	1337	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1364	SV * fh_or_path
1365	SV * callback
1366	ALIAS:	1338	ALIAS:
1367	aio_stat = REQ_STAT	1339	aio_stat = EIO_STAT
1368	aio_lstat = REQ_LSTAT	1340	aio_lstat = EIO_LSTAT
		1341	aio_statvfs = EIO_STATVFS
1369	PPCODE:	1342	PPCODE:
1370	{	1343	{
1371	dREQ;	1344	dREQ;
1372		1345
1373	New (0, req->statdata, 1, Stat_t);	1346	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1374	if (!req->statdata)
1375	{
1376	req_free (req);
1377	croak ("out of memory during aio_req->statdata allocation");
1378	}
1379
1380	if (SvPOK (fh_or_path))
1381	{
1382	req->type = ix;
1383	req->data = newSVsv (fh_or_path);
1384	req->dataptr = SvPVbyte_nolen (req->data);
1385	}
1386	else
1387	{
1388	req->type = REQ_FSTAT;
1389	req->fh = newSVsv (fh_or_path);
1390	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1391	}
1392		1347
1393	REQ_SEND;	1348	REQ_SEND;
1394	}	1349	}
1395		1350
		1351	UV
		1352	major (UV dev)
		1353	ALIAS:
		1354	minor = 1
		1355	CODE:
		1356	RETVAL = ix ? major (dev) : minor (dev);
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	UV
		1361	makedev (UV maj, UV min)
		1362	CODE:
		1363	RETVAL = makedev (maj, min);
		1364	OUTPUT:
		1365	RETVAL
		1366
1396	void	1367	void
		1368	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1369	PPCODE:
		1370	{
		1371	dREQ;
		1372
		1373	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1374	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1375	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1387	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1388
		1389	REQ_SEND;
		1390	}
		1391
		1392	void
		1393	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1394	PPCODE:
		1395	{
		1396	dREQ;
		1397
		1398	req->int2 = mode;
		1399	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	void
		1405	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1406	PPCODE:
		1407	{
		1408	dREQ;
		1409
		1410	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1411	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1412	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1413
		1414	REQ_SEND;
		1415	}
		1416
		1417	void
		1418	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1419	PPCODE:
		1420	{
		1421	dREQ;
		1422
		1423	req->type = EIO_READDIR;
		1424	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1425
		1426	if (flags & EIO_READDIR_DENTS)
		1427	req->int1 |= EIO_READDIR_CUSTOM2;
		1428
		1429	req_set_path1 (req, pathname);
		1430
		1431	REQ_SEND;
		1432	}
		1433
		1434	void
		1435	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = EIO_MKDIR;
		1441	req->int2 = mode;
		1442	req_set_path1 (req, pathname);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
1397	aio_unlink (pathname,callback=&PL_sv_undef)	1448	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1398	SV * pathname
1399	SV * callback
1400	ALIAS:	1449	ALIAS:
1401	aio_unlink = REQ_UNLINK	1450	aio_unlink = EIO_UNLINK
1402	aio_rmdir = REQ_RMDIR	1451	aio_rmdir = EIO_RMDIR
1403	aio_readdir = REQ_READDIR	1452	aio_readdir = EIO_READDIR
1404	PPCODE:	1453	PPCODE:
1405	{	1454	{
1406	dREQ;	1455	dREQ;
1407		1456
1408	req->type = ix;	1457	req->type = ix;
1409	req->data = newSVsv (pathname);	1458	req_set_path1 (req, pathname);
1410	req->dataptr = SvPVbyte_nolen (req->data);	1459
1411
1412	REQ_SEND;	1460	REQ_SEND;
1413	}	1461	}
1414		1462
1415	void	1463	void
1416	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1464	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1417	SV * oldpath
1418	SV * newpath
1419	SV * callback
1420	ALIAS:	1465	ALIAS:
1421	aio_link = REQ_LINK	1466	aio_link = EIO_LINK
1422	aio_symlink = REQ_SYMLINK	1467	aio_symlink = EIO_SYMLINK
1423	aio_rename = REQ_RENAME	1468	aio_rename = EIO_RENAME
1424	PPCODE:	1469	PPCODE:
1425	{	1470	{
		1471	eio_wd wd2 = 0;
1426	dREQ;	1472	dREQ;
1427		1473
1428	req->type = ix;	1474	req->type = ix;
1429	req->fh = newSVsv (oldpath);	1475	req_set_path1 (req, oldpath);
1430	req->data2ptr = SvPVbyte_nolen (req->fh);	1476	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1431	req->data = newSVsv (newpath);	1477	req->int3 = (long)wd2;
1432	req->dataptr = SvPVbyte_nolen (req->data);
1433		1478
1434	REQ_SEND;	1479	REQ_SEND;
1435	}	1480	}
1436		1481
1437	void	1482	void
1438	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1483	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1439	SV * pathname
1440	SV * callback
1441	UV mode
1442	UV dev
1443	PPCODE:	1484	PPCODE:
1444	{	1485	{
1445	dREQ;	1486	dREQ;
1446		1487
1447	req->type = REQ_MKNOD;	1488	req->type = EIO_MKNOD;
1448	req->data = newSVsv (pathname);
1449	req->dataptr = SvPVbyte_nolen (req->data);
1450	req->mode = (mode_t)mode;	1489	req->int2 = (mode_t)mode;
1451	req->offset = dev;	1490	req->offs = dev;
		1491	req_set_path1 (req, pathname);
1452		1492
1453	REQ_SEND;	1493	REQ_SEND;
1454	}	1494	}
1455		1495
1456	void	1496	void
		1497	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1498	ALIAS:
		1499	aio_mtouch = EIO_MTOUCH
		1500	aio_msync = EIO_MSYNC
		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 = ix;
		1520	req->sv2 = SvREFCNT_inc (data);
		1521	req->ptr2 = (char *)svptr + offset;
		1522	req->size = len;
		1523	req->int1 = flags;
		1524
		1525	REQ_SEND;
		1526	}
		1527	}
		1528
		1529	void
		1530	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1531	PPCODE:
		1532	{
		1533	STRLEN svlen;
		1534	char *svptr = SvPVbyte (data, svlen);
		1535	UV len = SvUV (length);
		1536
		1537	if (offset < 0)
		1538	offset += svlen;
		1539
		1540	if (offset < 0 || offset > svlen)
		1541	croak ("offset outside of scalar");
		1542
		1543	if (!SvOK (length) || len + offset > svlen)
		1544	len = svlen - offset;
		1545
		1546	{
		1547	dREQ;
		1548
		1549	req->type = EIO_MLOCK;
		1550	req->sv2 = SvREFCNT_inc (data);
		1551	req->ptr2 = (char *)svptr + offset;
		1552	req->size = len;
		1553
		1554	REQ_SEND;
		1555	}
		1556	}
		1557
		1558	void
		1559	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1560	PPCODE:
		1561	{
		1562	dREQ;
		1563
		1564	req->type = EIO_MLOCKALL;
		1565	req->int1 = flags;
		1566
		1567	REQ_SEND;
		1568	}
		1569
		1570	void
		1571	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1572	PPCODE:
		1573	{
		1574	int fd = s_fileno_croak (fh, 0);
		1575	dREQ;
		1576
		1577	req->type = EIO_CUSTOM;
		1578	req->sv1 = newSVsv (fh);
		1579	req->int1 = fd;
		1580
		1581	req->feed = fiemap;
		1582	#if HAVE_FIEMAP
		1583	/* keep our fingers crossed that the next two types are 64 bit */
		1584	req->offs = start;
		1585	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1586	req->int2 = flags;
		1587	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1588	#endif
		1589
		1590	REQ_SEND;
		1591	}
		1592
		1593	void
1457	aio_busy (delay,callback=&PL_sv_undef)	1594	aio_busy (double delay, SV *callback=&PL_sv_undef)
1458	double delay
1459	SV * callback
1460	PPCODE:	1595	PPCODE:
1461	{	1596	{
1462	dREQ;	1597	dREQ;
1463		1598
1464	req->type = REQ_BUSY;	1599	req->type = EIO_BUSY;
1465	req->fd = delay < 0. ? 0 : delay;	1600	req->nv1 = delay < 0. ? 0. : delay;
1466	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1467		1601
1468	REQ_SEND;	1602	REQ_SEND;
1469	}	1603	}
1470		1604
1471	void	1605	void
1472	aio_group (callback=&PL_sv_undef)	1606	aio_group (SV *callback=&PL_sv_undef)
1473	SV * callback
1474	PROTOTYPE: ;$
1475	PPCODE:	1607	PPCODE:
1476	{	1608	{
1477	dREQ;	1609	dREQ;
1478		1610
1479	req->type = REQ_GROUP;	1611	req->type = EIO_GROUP;
		1612
1480	req_send (req);	1613	req_submit (req);
1481
1482	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1614	XPUSHs (req_sv (req, aio_grp_stash));
1483	}	1615	}
1484		1616
1485	void	1617	void
1486	aio_nop (callback=&PL_sv_undef)	1618	aio_nop (SV *callback=&PL_sv_undef)
1487	SV * callback	1619	ALIAS:
		1620	aio_nop = EIO_NOP
		1621	aio_sync = EIO_SYNC
1488	PPCODE:	1622	PPCODE:
1489	{	1623	{
1490	dREQ;	1624	dREQ;
1491		1625
1492	req->type = REQ_NOP;	1626	req->type = ix;
1493		1627
1494	REQ_SEND;	1628	REQ_SEND;
1495	}	1629	}
1496		1630
1497	int	1631	int
1498	aioreq_pri (int pri = 0)	1632	aioreq_pri (int pri = 0)
1499	PROTOTYPE: ;$
1500	CODE:	1633	CODE:
1501	RETVAL = next_pri - PRI_BIAS;	1634	RETVAL = next_pri;
1502	if (items > 0)	1635	if (items > 0)
1503	{	1636	{
1504	if (pri < PRI_MIN) pri = PRI_MIN;	1637	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1505	if (pri > PRI_MAX) pri = PRI_MAX;	1638	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1506	next_pri = pri + PRI_BIAS;	1639	next_pri = pri;
1507	}	1640	}
1508	OUTPUT:	1641	OUTPUT:
1509	RETVAL	1642	RETVAL
1510		1643
1511	void	1644	void
1512	aioreq_nice (int nice = 0)	1645	aioreq_nice (int nice = 0)
1513	CODE:	1646	CODE:
1514	nice = next_pri - nice;	1647	nice = next_pri - nice;
1515	if (nice < PRI_MIN) nice = PRI_MIN;	1648	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1516	if (nice > PRI_MAX) nice = PRI_MAX;	1649	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1517	next_pri = nice + PRI_BIAS;	1650	next_pri = nice;
1518		1651
1519	void	1652	void
1520	flush ()	1653	flush ()
		1654	CODE:
		1655	while (eio_nreqs ())
		1656	{
		1657	poll_wait ();
		1658	poll_cb ();
		1659	}
		1660
		1661	int
		1662	poll ()
		1663	CODE:
		1664	poll_wait ();
		1665	RETVAL = poll_cb ();
		1666	OUTPUT:
		1667	RETVAL
		1668
		1669	int
		1670	poll_fileno ()
		1671	CODE:
		1672	RETVAL = s_epipe_fd (&respipe);
		1673	OUTPUT:
		1674	RETVAL
		1675
		1676	int
		1677	poll_cb (...)
1521	PROTOTYPE:	1678	PROTOTYPE:
1522	CODE:	1679	CODE:
1523	while (nreqs)
1524	{
1525	poll_wait ();
1526	poll_cb (0);	1680	RETVAL = poll_cb ();
1527	}
1528
1529	void
1530	poll()
1531	PROTOTYPE:
1532	CODE:
1533	if (nreqs)
1534	{
1535	poll_wait ();
1536	poll_cb (0);
1537	}
1538
1539	int
1540	poll_fileno()
1541	PROTOTYPE:
1542	CODE:
1543	RETVAL = respipe [0];
1544	OUTPUT:	1681	OUTPUT:
1545	RETVAL	1682	RETVAL
1546		1683
		1684	void
		1685	poll_wait ()
		1686	CODE:
		1687	poll_wait ();
		1688
1547	int	1689	int
1548	poll_cb(...)	1690	nreqs ()
1549	PROTOTYPE:
1550	CODE:	1691	CODE:
1551	RETVAL = poll_cb (0);	1692	RETVAL = eio_nreqs ();
1552	OUTPUT:	1693	OUTPUT:
1553	RETVAL	1694	RETVAL
1554		1695
1555	int	1696	int
1556	poll_some(int max = 0)	1697	nready ()
1557	PROTOTYPE: $
1558	CODE:	1698	CODE:
1559	RETVAL = poll_cb (max);	1699	RETVAL = eio_nready ();
1560	OUTPUT:	1700	OUTPUT:
1561	RETVAL	1701	RETVAL
1562		1702
1563	void	1703	int
1564	poll_wait()	1704	npending ()
1565	PROTOTYPE:
1566	CODE:	1705	CODE:
1567	if (nreqs)	1706	RETVAL = eio_npending ();
1568	poll_wait ();
1569
1570	int
1571	nreqs()
1572	PROTOTYPE:
1573	CODE:
1574	RETVAL = nreqs;
1575	OUTPUT:	1707	OUTPUT:
1576	RETVAL	1708	RETVAL
1577		1709
1578	int	1710	int
1579	nready()	1711	nthreads ()
1580	PROTOTYPE:
1581	CODE:	1712	CODE:
1582	RETVAL = get_nready ();	1713	RETVAL = eio_nthreads ();
1583	OUTPUT:	1714	OUTPUT:
1584	RETVAL	1715	RETVAL
1585		1716
1586	int	1717	int
1587	npending()	1718	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1588	PROTOTYPE:	1719	CODE:
		1720	RETVAL = posix_fadvise (fh, offset, length, advice);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	IV
		1725	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1726	CODE:
		1727	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	void
		1732	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1733	PPCODE:
		1734	sv_unmagic (scalar, MMAP_MAGIC);
		1735	{
		1736	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1737	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1738	if (addr == (void *)-1)
		1739	XSRETURN_NO;
		1740
		1741	sv_force_normal (scalar);
		1742
		1743	/* we store the length in mg_obj, as namlen is I32 :/ */
		1744	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1745	->mg_obj = (SV *)length;
		1746
		1747	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1748
		1749	if (!(prot & PROT_WRITE))
		1750	SvREADONLY_on (scalar);
		1751
		1752	if (SvLEN (scalar))
		1753	Safefree (SvPVX (scalar));
		1754
		1755	SvPVX (scalar) = (char *)addr;
		1756	SvCUR_set (scalar, length);
		1757	SvLEN_set (scalar, 0);
		1758	SvPOK_only (scalar);
		1759
		1760	XSRETURN_YES;
		1761	}
		1762
		1763	void
		1764	munmap (SV *scalar)
1589	CODE:	1765	CODE:
1590	RETVAL = get_npending ();	1766	sv_unmagic (scalar, MMAP_MAGIC);
		1767
		1768	int
		1769	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1770	ALIAS:
		1771	mprotect = 1
		1772	CODE:
		1773	{
		1774	STRLEN svlen;
		1775	void *addr = SvPVbyte (scalar, svlen);
		1776	size_t len = SvUV (length);
		1777
		1778	if (offset < 0)
		1779	offset += svlen;
		1780
		1781	if (offset < 0 || offset > svlen)
		1782	croak ("offset outside of scalar");
		1783
		1784	if (!SvOK (length) || len + offset > svlen)
		1785	len = svlen - offset;
		1786
		1787	addr = (void *)(((intptr_t)addr) + offset);
		1788	eio_page_align (&addr, &len);
		1789
		1790	switch (ix)
		1791	{
		1792	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1793	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1794	}
		1795	}
1591	OUTPUT:	1796	OUTPUT:
1592	RETVAL	1797	RETVAL
		1798
		1799	int
		1800	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1801	CODE:
		1802	{
		1803	STRLEN svlen;
		1804	void *addr = SvPVbyte (scalar, svlen);
		1805	size_t len = SvUV (length);
		1806
		1807	if (offset < 0)
		1808	offset += svlen;
		1809
		1810	if (offset < 0 || offset > svlen)
		1811	croak ("offset outside of scalar");
		1812
		1813	if (!SvOK (length) || len + offset > svlen)
		1814	len = svlen - offset;
		1815
		1816	addr = (void *)(((intptr_t)addr) + offset);
		1817	eio_page_align (&addr, &len);
		1818	#if _POSIX_MEMLOCK_RANGE
		1819	RETVAL = munlock (addr, len);
		1820	#else
		1821	RETVAL = EIO_ENOSYS ();
		1822	#endif
		1823	}
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
		1828	munlockall ()
		1829	CODE:
		1830	#if _POSIX_MEMLOCK
		1831	munlockall ();
		1832	#else
		1833	RETVAL = EIO_ENOSYS ();
		1834	#endif
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	int
		1839	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1840	CODE:
		1841	{
		1842	#if HAVE_LINUX_SPLICE
		1843	loff_t off_in_, off_out_;
		1844	RETVAL = splice (
		1845	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1846	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1847	length, flags
		1848	);
		1849	#else
		1850	RETVAL = EIO_ENOSYS ();
		1851	#endif
		1852	}
		1853	OUTPUT:
		1854	RETVAL
		1855
		1856	int
		1857	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1858	CODE:
		1859	#if HAVE_LINUX_SPLICE
		1860	RETVAL = tee (rfh, wfh, length, flags);
		1861	#else
		1862	RETVAL = EIO_ENOSYS ();
		1863	#endif
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	void _on_next_submit (SV *cb)
		1868	CODE:
		1869	SvREFCNT_dec (on_next_submit);
		1870	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1593		1871
1594	PROTOTYPES: DISABLE	1872	PROTOTYPES: DISABLE
		1873
		1874	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1875
		1876	BOOT:
		1877	{
		1878	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1879	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1880	}
		1881
		1882	void
		1883	DESTROY (SV *self)
		1884	CODE:
		1885	{
		1886	aio_wd wd = SvAIO_WD (self);
		1887	#if HAVE_AT
		1888	{
		1889	SV *callback = &PL_sv_undef;
		1890	dREQ; /* clobbers next_pri :/ */
		1891	next_pri = req->pri; /* restore next_pri */
		1892	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1893	req->type = EIO_WD_CLOSE;
		1894	req->wd = wd;
		1895	REQ_SEND;
		1896	}
		1897	#else
		1898	eio_wd_close_sync (wd);
		1899	#endif
		1900	}
1595		1901
1596	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1902	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1597		1903
1598	void	1904	void
1599	cancel (aio_req_ornot req)	1905	cancel (aio_req_ornot req)
1600	CODE:	1906	CODE:
1601	req_cancel (req);	1907	eio_cancel (req);
1602		1908
1603	void	1909	void
1604	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1910	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1605	CODE:	1911	PPCODE:
		1912	{
		1913	if (GIMME_V != G_VOID)
		1914	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1915
		1916	if (items > 1)
		1917	{
		1918	SV *cb_cv =get_cb (callback);
		1919
1606	SvREFCNT_dec (req->callback);	1920	SvREFCNT_dec (req->callback);
1607	req->callback = newSVsv (callback);	1921	req->callback = SvREFCNT_inc (cb_cv);
		1922	}
		1923	}
1608		1924
1609	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1925	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1610		1926
1611	void	1927	void
1612	add (aio_req grp, ...)	1928	add (aio_req grp, ...)
1613	PPCODE:	1929	PPCODE:
1614	{	1930	{
1615	int i;	1931	int i;
1616	aio_req req;
1617		1932
1618	if (grp->fd == 2)	1933	if (grp->int1 == 2)
1619	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1934	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1620		1935
1621	for (i = 1; i < items; ++i )	1936	for (i = 1; i < items; ++i )
1622	{	1937	{
		1938	aio_req req;
		1939
1623	if (GIMME_V != G_VOID)	1940	if (GIMME_V != G_VOID)
1624	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1941	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1625		1942
1626	req = SvAIO_REQ (ST (i));	1943	req = SvAIO_REQ (ST (i));
1627		1944
1628	if (req)	1945	if (req)
1629	{	1946	eio_grp_add (grp, req);
1630	++grp->length;
1631	req->grp = grp;
1632
1633	req->grp_prev = 0;
1634	req->grp_next = grp->grp_first;
1635
1636	if (grp->grp_first)
1637	grp->grp_first->grp_prev = req;
1638
1639	grp->grp_first = req;
1640	}
1641	}	1947	}
1642	}	1948	}
1643		1949
1644	void	1950	void
1645	cancel_subs (aio_req_ornot req)	1951	cancel_subs (aio_req_ornot req)
…		…
1654	AV *av;	1960	AV *av;
1655		1961
1656	grp->errorno = errno;	1962	grp->errorno = errno;
1657		1963
1658	av = newAV ();	1964	av = newAV ();
		1965	av_extend (av, items - 1);
1659		1966
1660	for (i = 1; i < items; ++i )	1967	for (i = 1; i < items; ++i )
1661	av_push (av, newSVsv (ST (i)));	1968	av_push (av, newSVsv (ST (i)));
1662		1969
1663	SvREFCNT_dec (grp->data);	1970	SvREFCNT_dec (grp->sv1);
1664	grp->data = (SV *)av;	1971	grp->sv1 = (SV *)av;
1665	}	1972	}
1666		1973
1667	void	1974	void
1668	errno (aio_req grp, int errorno = errno)	1975	errno (aio_req grp, int errorno = errno)
1669	CODE:	1976	CODE:
1670	grp->errorno = errorno;	1977	grp->errorno = errorno;
1671		1978
1672	void	1979	void
1673	limit (aio_req grp, int limit)	1980	limit (aio_req grp, int limit)
1674	CODE:	1981	CODE:
1675	grp->fd2 = limit;	1982	eio_grp_limit (grp, limit);
1676	aio_grp_feed (grp);
1677		1983
1678	void	1984	void
1679	feed (aio_req grp, SV *callback=&PL_sv_undef)	1985	feed (aio_req grp, SV *callback=&PL_sv_undef)
1680	CODE:	1986	CODE:
1681	{	1987	{
1682	SvREFCNT_dec (grp->fh2);	1988	SvREFCNT_dec (grp->sv2);
1683	grp->fh2 = newSVsv (callback);	1989	grp->sv2 = newSVsv (callback);
		1990	grp->feed = aio_grp_feed;
1684		1991
1685	if (grp->fd2 <= 0)	1992	if (grp->int2 <= 0)
1686	grp->fd2 = 2;	1993	grp->int2 = 2;
1687		1994
1688	aio_grp_feed (grp);	1995	eio_grp_limit (grp, grp->int2);
1689	}	1996	}
1690		1997

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