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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.84 by root, Sat Oct 28 01:24:19 2006 UTC vs.
Revision 1.214 by root, Mon May 28 17:00:19 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	/* number of seconds after which idle threads exit */	145	/* defines all sorts of constants to 0 unless they are already defined */
49	#define IDLE_TIMEOUT 10	146	#include "def0.h"
50		147
51	/* used for struct dirent, AIX doesn't provide it */	148	#ifndef makedev
52	#ifndef NAME_MAX	149	# define makedev(maj,min) (((maj) << 8) | (min))
53	# define NAME_MAX 4096
54	#endif	150	#endif
55		151	#ifndef major
56	#ifndef PTHREAD_STACK_MIN	152	# define major(dev) ((dev) >> 8)
57	/* care for broken platforms, e.g. windows */
58	# define PTHREAD_STACK_MIN 16384
59	#endif	153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
60		157
61	#if __ia64	158	#ifndef PAGESIZE
62	# define STACKSIZE 65536	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	160	#endif
64	# define STACKSIZE PTHREAD_STACK_MIN	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 64 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 maybe 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_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST)
		200	break; /* autosizing successful, we are done */
		201
		202	fiemap->fm_flags = req->int2;
		203	fiemap->fm_extent_count = 0;
		204
		205	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		206	return;
		207
		208	count = fiemap->fm_mapped_extents;
		209
		210	free (fiemap);
		211	}
		212
		213	req->result = 0;
		214
65	#else	215	#else
66	# define STACKSIZE 16384	216	errno = ENOSYS;
67	#endif
68
69	/* wether word reads are potentially non-atomic.
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDREAD_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDREAD_UNSAFE 0
76	# else
77	# define WORDREAD_UNSAFE 1
78	# endif	217	#endif
79	#endif	218	}
80		219
81	/* buffer size for various temporary buffers */	220	/*****************************************************************************/
82	#define AIO_BUFSIZE 65536
83
84	#define dBUF \
85	char *aio_buf; \
86	LOCK (wrklock); \
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		221
92	enum {	222	enum {
93	REQ_QUIT,	223	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	224	};
105		225
106	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;
114	SV *fh, *fh2;
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;
122	int type;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	};
137
138	typedef aio_cb *aio_req;	226	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	227	typedef eio_req *aio_req_ornot;
		228	typedef eio_wd aio_wd;
140		229
141	enum {	230	static SV *on_next_submit;
142	PRI_MIN = -4,	231	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	232	static int max_outstanding;
144		233
145	DEFAULT_PRI = 0,	234	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		235
150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
151
152	static unsigned int started, idle, wanted;
153
154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156	#else
157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158	#endif
159
160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163	/* worker threads management */
164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166	typedef struct worker {
167	/* locked by wrklock */
168	struct worker *prev, *next;
169
170	pthread_t tid;
171
172	/* locked by reslock, reqlock or wrklock */
173	aio_req req; /* currently processed request */
174	void *dbuf;
175	DIR *dirp;
176	} worker;
177
178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180	static void worker_clear (worker *wrk)
181	{
182	if (wrk->dirp)
183	{
184	closedir (wrk->dirp);
185	wrk->dirp = 0;
186	}
187
188	if (wrk->dbuf)
189	{
190	free (wrk->dbuf);
191	wrk->dbuf = 0;
192	}
193	}
194
195	static void worker_free (worker *wrk)
196	{
197	wrk->next->prev = wrk->prev;
198	wrk->prev->next = wrk->next;
199
200	free (wrk);
201	}
202
203	static volatile unsigned int nreqs, nready, npending;
204	static volatile unsigned int max_idle = 4;
205	static volatile unsigned int max_outstanding = 0xffffffff;
206	static int respipe [2];
207
208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
211
212	#if WORDREAD_UNSAFE
213
214	static unsigned int get_nready ()
215	{
216	unsigned int retval;
217
218	LOCK (reqlock);
219	retval = nready;
220	UNLOCK (reqlock);
221
222	return retval;
223	}
224
225	static unsigned int get_npending ()
226	{
227	unsigned int retval;
228
229	LOCK (reslock);
230	retval = npending;
231	UNLOCK (reslock);
232
233	return retval;
234	}
235
236	#else
237
238	# define get_nready() nready
239	# define get_npending() npending
240
241	#endif
242
243	/*
244	* a somewhat faster data structure might be nice, but
245	* with 8 priorities this actually needs <20 insns
246	* per shift, the most expensive operation.
247	*/
248	typedef struct {
249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
250	int size;
251	} reqq;
252
253	static reqq req_queue;
254	static reqq res_queue;
255
256	int reqq_push (reqq *q, aio_req req)
257	{
258	int pri = req->pri;
259	req->next = 0;
260
261	if (q->qe[pri])
262	{
263	q->qe[pri]->next = req;
264	q->qe[pri] = req;
265	}
266	else
267	q->qe[pri] = q->qs[pri] = req;
268
269	return q->size++;
270	}
271
272	aio_req reqq_shift (reqq *q)
273	{
274	int pri;
275
276	if (!q->size)
277	return 0;
278
279	--q->size;
280
281	for (pri = NUM_PRI; pri--; )
282	{
283	aio_req req = q->qs[pri];
284
285	if (req)
286	{
287	if (!(q->qs[pri] = req->next))
288	q->qe[pri] = 0;
289
290	return req;
291	}
292	}
293
294	abort ();
295	}
296
297	static int poll_cb (int max);
298	static void req_invoke (aio_req req);
299	static void req_free (aio_req req);	236	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	237	static void req_cancel (aio_req req);
301		238
		239	static void
		240	want_poll (void)
		241	{
		242	/* write a dummy byte to the pipe so fh becomes ready */
		243	s_epipe_signal (&respipe);
		244	}
		245
		246	static void
		247	done_poll (void)
		248	{
		249	/* read any signals sent by the worker threads */
		250	s_epipe_drain (&respipe);
		251	}
		252
302	/* must be called at most once */	253	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	254	static SV *
		255	req_sv (aio_req req, HV *stash)
304	{	256	{
305	if (!req->self)	257	if (!req->self)
306	{	258	{
307	req->self = (SV *)newHV ();	259	req->self = (SV *)newHV ();
308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309	}	261	}
310		262
311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	263	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
312	}	264	}
313		265
314	static aio_req SvAIO_REQ (SV *sv)	266	static SV *
		267	newSVaio_wd (aio_wd wd)
		268	{
		269	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		270	}
		271
		272	static aio_req
		273	SvAIO_REQ (SV *sv)
315	{	274	{
316	MAGIC *mg;	275	MAGIC *mg;
317		276
318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	277	if (!SvROK (sv)
		278	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		279	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		280	&& SvSTASH (SvRV (sv)) != aio_req_stash
		281	&& !sv_derived_from (sv, "IO::AIO::REQ")))
319	croak ("object of class " AIO_REQ_KLASS " expected");	282	croak ("object of class IO::AIO::REQ expected");
320		283
321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	284	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322		285
323	return mg ? (aio_req)mg->mg_ptr : 0;	286	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	287	}
325		288
		289	static aio_wd
		290	SvAIO_WD (SV *sv)
		291	{
		292	if (!SvROK (sv)
		293	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		294	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		295	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		296
		297	return (aio_wd)(long)SvIVX (SvRV (sv));
		298	}
		299
		300	static void
326	static void aio_grp_feed (aio_req grp)	301	aio_grp_feed (aio_req grp)
327	{	302	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	303	if (grp->sv2 && SvOK (grp->sv2))
329	{	304	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	305	dSP;
335		306
336	ENTER;	307	ENTER;
337	SAVETMPS;	308	SAVETMPS;
338	PUSHMARK (SP);	309	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	310	XPUSHs (req_sv (grp, aio_grp_stash));
340	PUTBACK;	311	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	312	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	313	SPAGAIN;
343	FREETMPS;	314	FREETMPS;
344	LEAVE;	315	LEAVE;
345	}
346
347	/* stop if no progress has been made */
348	if (old_len == grp->length)
349	{
350	SvREFCNT_dec (grp->fh2);
351	grp->fh2 = 0;
352	break;
353	}
354	}	316	}
355	}	317	}
356		318
357	static void aio_grp_dec (aio_req grp)	319	static void
		320	req_submit (eio_req *req)
358	{	321	{
359	--grp->length;	322	eio_submit (req);
360		323
361	/* call feeder, if applicable */	324	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	325	{
367	req_invoke (grp);	326	dSP;
368	req_free (grp);	327	SV *cb = sv_2mortal (on_next_submit);
		328
		329	on_next_submit = 0;
		330
		331	PUSHMARK (SP);
		332	PUTBACK;
		333	call_sv (cb, G_DISCARD | G_EVAL);
369	}	334	}
370	}	335	}
371		336
		337	static int
372	static void req_invoke (aio_req req)	338	req_invoke (eio_req *req)
373	{	339	{
374	dSP;	340	if (req->flags & FLAG_SV2_RO_OFF)
		341	SvREADONLY_off (req->sv2);
375		342
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	343	if (!EIO_CANCELLED (req) && req->callback)
377	{	344	{
		345	dSP;
		346	static SV *sv_result_cache; /* caches the result integer SV */
		347	SV *sv_result;
		348
378	ENTER;	349	ENTER;
379	SAVETMPS;	350	SAVETMPS;
380	PUSHMARK (SP);	351	PUSHMARK (SP);
381	EXTEND (SP, 1);	352	EXTEND (SP, 1);
382		353
		354	/* do not recreate the result IV from scratch each time */
		355	if (expect_true (sv_result_cache))
		356	{
		357	sv_result = sv_result_cache; sv_result_cache = 0;
		358	SvIV_set (sv_result, req->result);
		359	SvIOK_only (sv_result);
		360	}
		361	else
		362	{
		363	sv_result = newSViv (req->result);
		364	SvREADONLY_on (sv_result);
		365	}
		366
383	switch (req->type)	367	switch (req->type)
384	{	368	{
		369	case EIO_WD_OPEN:
		370	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		371	break;
		372
385	case REQ_READDIR:	373	case EIO_READDIR:
386	{	374	{
387	SV *rv = &PL_sv_undef;	375	SV *rv = &PL_sv_undef;
388		376
389	if (req->result >= 0)	377	if (req->result >= 0)
390	{	378	{
391	int i;	379	int i;
392	char *buf = req->data2ptr;	380	char *names = (char *)req->ptr2;
		381	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	382	AV *av = newAV ();
394		383
395	av_extend (av, req->result - 1);	384	av_extend (av, req->result - 1);
396		385
397	for (i = 0; i < req->result; ++i)	386	for (i = 0; i < req->result; ++i)
398	{	387	{
399	SV *sv = newSVpv (buf, 0);	388	if (req->int1 & EIO_READDIR_DENTS)
		389	{
		390	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		391
		392	if (req->int1 & EIO_READDIR_CUSTOM2)
		393	{
		394	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		395	AV *avent = newAV ();
		396
		397	av_extend (avent, 2);
		398
		399	if (!sv_type [ent->type])
		400	{
		401	sv_type [ent->type] = newSViv (ent->type);
		402	SvREADONLY_on (sv_type [ent->type]);
		403	}
		404
		405	av_store (avent, 0, namesv);
		406	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		407	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		408
		409	av_store (av, i, newRV_noinc ((SV *)avent));
		410	}
		411	else
401	av_store (av, i, sv);	412	av_store (av, i, namesv);
		413
		414	++ent;
		415	}
		416	else
		417	{
		418	SV *name = newSVpv (names, 0);
		419	av_store (av, i, name);
402	buf += SvCUR (sv) + 1;	420	names += SvCUR (name) + 1;
		421	}
403	}	422	}
404		423
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	424	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	425	}
407		426
408	PUSHs (rv);	427	PUSHs (rv);
		428
		429	if (req->int1 & EIO_READDIR_CUSTOM1)
		430	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
409	}	431	}
410	break;	432	break;
411		433
412	case REQ_OPEN:	434	case EIO_OPEN:
413	{	435	{
414	/* convert fd to fh */	436	/* convert fd to fh */
415	SV *fh;	437	SV *fh = &PL_sv_undef;
416		438
417	PUSHs (sv_2mortal (newSViv (req->result)));	439	if (req->result >= 0)
418	PUTBACK;	440	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	441	GV *gv = (GV *)sv_newmortal ();
420	SPAGAIN;	442	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		443	char sym [64];
		444	int symlen;
		445
		446	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		447	gv_init (gv, aio_stash, sym, symlen, 0);
421		448
422	fh = SvREFCNT_inc (POPs);	449	symlen = snprintf (
		450	sym,
		451	sizeof (sym),
		452	"%s&=%d",
		453	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		454	(int)req->result
		455	);
423		456
		457	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		458	fh = (SV *)gv;
		459	}
		460
424	PUSHMARK (SP);	461	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	462	}
427	break;	463	break;
428		464
		465	case EIO_STATVFS:
		466	case EIO_FSTATVFS:
		467	{
		468	SV *rv = &PL_sv_undef;
		469
		470	#ifndef _WIN32
		471	if (req->result >= 0)
		472	{
		473	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		474	HV *hv = newHV ();
		475
		476	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		477
		478	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		479	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		480	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		481	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		482	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		483	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		484	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		485	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		486	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		487	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		488	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		489	}
		490	#endif
		491
		492	PUSHs (rv);
		493	}
		494
		495	break;
		496
429	case REQ_GROUP:	497	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	498	req->int1 = 2; /* mark group as finished */
431		499
432	if (req->data)	500	if (req->sv1)
433	{	501	{
434	int i;	502	int i;
435	AV *av = (AV *)req->data;	503	AV *av = (AV *)req->sv1;
436		504
437	EXTEND (SP, AvFILL (av) + 1);	505	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	506	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	507	PUSHs (*av_fetch (av, i, 0));
440	}	508	}
441	break;	509	break;
442		510
443	case REQ_NOP:	511	case EIO_NOP:
444	case REQ_BUSY:	512	case EIO_BUSY:
445	break;	513	break;
446		514
		515	case EIO_READLINK:
		516	case EIO_REALPATH:
		517	if (req->result > 0)
		518	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		519	break;
		520
		521	case EIO_STAT:
		522	case EIO_LSTAT:
		523	case EIO_FSTAT:
		524	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		525
		526	if (!(PL_laststatval = req->result))
		527	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		528	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		529
		530	PUSHs (sv_result);
		531	break;
		532
		533	case EIO_SEEK:
		534	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		535	break;
		536
		537	case EIO_READ:
		538	{
		539	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		540	*SvEND (req->sv2) = 0;
		541	SvPOK_only (req->sv2);
		542	SvSETMAGIC (req->sv2);
		543	PUSHs (sv_result);
		544	}
		545	break;
		546
		547	case EIO_CUSTOM:
		548	if (req->feed == fiemap)
		549	{
		550	#if HAVE_FIEMAP
		551	if (!req->result)
		552	{
		553	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		554
		555	if (fiemap->fm_extent_count)
		556	{
		557	AV *av = newAV ();
		558	int i;
		559
		560	while (fiemap->fm_mapped_extents)
		561	{
		562	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		563	AV *ext_av = newAV ();
		564
		565	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		566	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		567	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		568	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		569
		570	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		571	}
		572
		573	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		574	}
		575	else
		576	{
		577	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		578	PUSHs (sv_result);
		579	}
		580	}
		581	#endif
		582	}
		583	else
		584	PUSHs (sv_result);
		585	break;
		586
		587	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		588	if (req->result > 0)
		589	SvIV_set (sv_result, 0);
		590	/* FALLTHROUGH */
		591
447	default:	592	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	593	PUSHs (sv_result);
449	break;	594	break;
450	}	595	}
451		596
452	errno = req->errorno;	597	errno = req->errorno;
453		598
454	PUTBACK;	599	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	600	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	601	SPAGAIN;
		602
		603	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		604	SvREFCNT_dec (sv_result);
		605	else
		606	sv_result_cache = sv_result;
457		607
458	FREETMPS;	608	FREETMPS;
459	LEAVE;	609	LEAVE;
		610
		611	PUTBACK;
460	}	612	}
461		613
462	if (req->grp)	614	return !!SvTRUE (ERRSV);
463	{
464	aio_req grp = req->grp;
465
466	/* unlink request */
467	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
469
470	if (grp->grp_first == req)
471	grp->grp_first = req->grp_next;
472
473	aio_grp_dec (grp);
474	}
475
476	if (SvTRUE (ERRSV))
477	{
478	req_free (req);
479	croak (0);
480	}
481	}	615	}
482		616
483	static void req_free (aio_req req)	617	static void
		618	req_destroy (aio_req req)
484	{	619	{
485	if (req->self)	620	if (req->self)
486	{	621	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	622	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	623	SvREFCNT_dec (req->self);
489	}	624	}
490		625
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	626	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	627	SvREFCNT_dec (req->sv2);
		628	SvREFCNT_dec (req->sv3);
		629	SvREFCNT_dec (req->sv4);
494	SvREFCNT_dec (req->callback);	630	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496		631
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499
500	Safefree (req);	632	free (req);
501	}	633	}
502		634
		635	static void
503	static void req_cancel_subs (aio_req grp)	636	req_cancel_subs (aio_req grp)
504	{	637	{
505	aio_req sub;
506
507	if (grp->type != REQ_GROUP)	638	if (grp->type != EIO_GROUP)
508	return;	639	return;
509		640
510	SvREFCNT_dec (grp->fh2);	641	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	642	grp->sv2 = 0;
512		643
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	644	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	645	}
516		646
517	static void req_cancel (aio_req req)	647	static void ecb_cold
		648	create_respipe (void)
518	{	649	{
519	req->flags |= FLAG_CANCELLED;	650	if (s_epipe_renew (&respipe))
520		651	croak ("IO::AIO: unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	652	}
523		653
524	static void *aio_proc(void *arg);	654	static void
525		655	poll_wait (void)
526	static void start_thread (void)
527	{	656	{
528	sigset_t fullsigset, oldsigset;
529	pthread_attr_t attr;
530
531	worker *wrk = calloc (1, sizeof (worker));
532
533	if (!wrk)
534	croak ("unable to allocate worker thread data");
535
536	pthread_attr_init (&attr);
537	pthread_attr_setstacksize (&attr, STACKSIZE);
538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
539	#ifdef PTHREAD_SCOPE_PROCESS
540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
541	#endif
542
543	sigfillset (&fullsigset);
544
545	LOCK (wrklock);
546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
547
548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
549	{
550	wrk->prev = &wrk_first;
551	wrk->next = wrk_first.next;
552	wrk_first.next->prev = wrk;
553	wrk_first.next = wrk;
554	++started;
555	}
556	else
557	free (wrk);
558
559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
560	UNLOCK (wrklock);
561	}
562
563	static void maybe_start_thread ()
564	{
565	if (started >= wanted)
566	return;
567
568	/* todo: maybe use idle here, but might be less exact */
569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
570	return;
571
572	start_thread ();
573	}
574
575	static void req_send (aio_req req)
576	{
577	++nreqs;
578
579	LOCK (reqlock);
580	++nready;
581	reqq_push (&req_queue, req);
582	pthread_cond_signal (&reqwait);
583	UNLOCK (reqlock);
584
585	maybe_start_thread ();
586	}
587
588	static void end_thread (void)
589	{
590	aio_req req;
591
592	Newz (0, req, 1, aio_cb);
593
594	req->type = REQ_QUIT;
595	req->pri = PRI_MAX + PRI_BIAS;
596
597	LOCK (reqlock);
598	reqq_push (&req_queue, req);
599	pthread_cond_signal (&reqwait);
600	UNLOCK (reqlock);
601
602	LOCK (wrklock);
603	--started;
604	UNLOCK (wrklock);
605	}
606
607	static void min_parallel (int nthreads)
608	{
609	if (wanted < nthreads)
610	wanted = nthreads;
611	}
612
613	static void max_parallel (int nthreads)
614	{
615	if (wanted > nthreads)
616	wanted = nthreads;
617
618	while (started > wanted)
619	end_thread ();
620	}
621
622	static void poll_wait ()
623	{
624	fd_set rfd;
625
626	while (nreqs)	657	while (eio_nreqs ())
627	{	658	{
628	int size;	659	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	660
		661	X_LOCK (reslock);
630	size = res_queue.size;	662	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	663	X_UNLOCK (reslock);
632		664
633	if (size)	665	if (size)
634	return;	666	return;
635		667
636	maybe_start_thread ();	668	etp_maybe_start_thread ();
637		669
638	FD_ZERO(&rfd);	670	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	671	}
643	}	672	}
644		673
645	static int poll_cb (int max)	674	static int
		675	poll_cb (void)
646	{	676	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	677	for (;;)
653	{	678	{
654	while (max <= 0 || count < max)	679	int res = eio_poll ();
		680
		681	if (res > 0)
		682	croak (0);
		683
		684	if (!max_outstanding || max_outstanding > eio_nreqs ())
		685	return res;
		686
		687	poll_wait ();
		688	}
		689	}
		690
		691	static void ecb_cold
		692	reinit (void)
		693	{
		694	create_respipe ();
		695
		696	if (eio_init (want_poll, done_poll) < 0)
		697	croak ("IO::AIO: unable to initialise eio library");
		698	}
		699
		700	/*****************************************************************************/
		701
		702	#if !_POSIX_MAPPED_FILES
		703	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		704	# define munmap(addr,length) EIO_ENOSYS ()
		705	#endif
		706
		707	#if !_POSIX_MEMORY_PROTECTION
		708	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		709	# define PROT_NONE 0
		710	# define PROT_WRITE 0
		711	# define MAP_PRIVATE 0
		712	# define MAP_SHARED 0
		713	# define MAP_FIXED 0
		714	#endif
		715
		716	#define MMAP_MAGIC PERL_MAGIC_ext
		717
		718	static int ecb_cold
		719	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		720	{
		721	int old_errno = errno;
		722	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		723	errno = old_errno;
		724
		725	mg->mg_obj = 0; /* just in case */
		726
		727	SvREADONLY_off (sv);
		728
		729	if (SvPVX (sv) != mg->mg_ptr)
		730	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		731
		732	SvCUR_set (sv, 0);
		733	SvPVX (sv) = 0;
		734	SvOK_off (sv);
		735
		736	return 0;
		737	}
		738
		739	static MGVTBL mmap_vtbl = {
		740	0, 0, 0, 0, mmap_free
		741	};
		742
		743	/*****************************************************************************/
		744
		745	static SV *
		746	get_cb (SV *cb_sv)
		747	{
		748	SvGETMAGIC (cb_sv);
		749	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		750	}
		751
		752	static aio_req ecb_noinline
		753	dreq (SV *callback)
		754	{
		755	SV *cb_cv;
		756	aio_req req;
		757	int req_pri = next_pri;
		758	next_pri = EIO_PRI_DEFAULT;
		759
		760	cb_cv = get_cb (callback);
		761
		762	req = calloc (sizeof (*req), 1);
		763	if (!req)
		764	croak ("out of memory during eio_req allocation");
		765
		766	req->callback = SvREFCNT_inc (cb_cv);
		767	req->pri = req_pri;
		768
		769	return req;
		770	}
		771
		772	#define dREQ \
		773	aio_req req = dreq (callback); \
		774
		775	#define REQ_SEND \
		776	PUTBACK; \
		777	req_submit (req); \
		778	SPAGAIN; \
		779	\
		780	if (GIMME_V != G_VOID) \
		781	XPUSHs (req_sv (req, aio_req_stash));
		782
		783	ecb_inline void
		784	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		785	{
		786	if (expect_false (SvROK (path)))
		787	{
		788	SV *rv = SvRV (path);
		789	SV *wdob;
		790
		791	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
655	{	792	{
656	maybe_start_thread ();	793	path = AvARRAY (rv)[1];
		794	wdob = AvARRAY (rv)[0];
657		795
658	LOCK (reslock);	796	if (SvOK (wdob))
659	req = reqq_shift (&res_queue);
660
661	if (req)
662	{	797	{
663	--npending;	798	*wd = SvAIO_WD (wdob);
664		799	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
665	if (!res_queue.size)
666	{
667	/* read any signals sent by the worker threads */
668	char buf [32];
669	while (read (respipe [0], buf, 32) == 32)
670	;
671	}
672	}
673
674	UNLOCK (reslock);
675
676	if (!req)
677	break;
678
679	--nreqs;
680
681	if (req->type == REQ_GROUP && req->length)
682	{
683	req->fd = 1; /* mark request as delayed */
684	continue;
685	}	800	}
686	else	801	else
687	{	802	*wd = EIO_INVALID_WD;
688	if (req->type == REQ_READ)
689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
690
691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
692	SvREADONLY_off (req->data);
693
694	if (req->statdata)
695	{
696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
697	PL_laststatval = req->result;
698	PL_statcache = *(req->statdata);
699	}
700
701	req_invoke (req);
702
703	count++;
704	}
705
706	req_free (req);
707	}	803	}
		804	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		805	{
		806	*wd = (aio_wd)(long)SvIVX (rv);
		807	*wdsv = SvREFCNT_inc_NN (rv);
		808	*ptr = ".";
		809	return; /* path set to "." */
		810	}
		811	else
		812	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		813	}
708		814
709	if (nreqs <= max_outstanding)	815	*pathsv = newSVsv (path);
		816	*ptr = SvPVbyte_nolen (*pathsv);
		817	}
		818
		819	static void ecb_noinline
		820	req_set_path1 (aio_req req, SV *path)
		821	{
		822	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		823	}
		824
		825	static void ecb_noinline
		826	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		827	{
		828	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		829
		830	switch (SvTYPE (rv))
		831	{
		832	case SVt_PVIO:
		833	case SVt_PVLV:
		834	case SVt_PVGV:
		835	req->type = type_fh;
		836	req->sv1 = newSVsv (fh_or_path);
		837	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
710	break;	838	break;
711		839
712	poll_wait ();	840	default:
713		841	req->type = type_path;
714	max = 0;	842	req_set_path1 (req, fh_or_path);
		843	break;
715	}	844	}
716
717	return count;
718	}	845	}
719		846
720	static void create_pipe ()	847	XS(boot_IO__AIO) ecb_cold;
721	{
722	if (pipe (respipe))
723	croak ("unable to initialize result pipe");
724		848
725	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
726	croak ("cannot set result pipe to nonblocking mode");
727
728	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
729	croak ("cannot set result pipe to nonblocking mode");
730	}
731
732	/*****************************************************************************/
733	/* work around various missing functions */
734
735	#if !HAVE_PREADWRITE
736	# define pread aio_pread
737	# define pwrite aio_pwrite
738
739	/*
740	* make our pread/pwrite safe against themselves, but not against
741	* normal read/write by using a mutex. slows down execution a lot,
742	* but that's your problem, not mine.
743	*/
744	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
745
746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
747	{
748	ssize_t res;
749	off_t ooffset;
750
751	LOCK (preadwritelock);
752	ooffset = lseek (fd, 0, SEEK_CUR);
753	lseek (fd, offset, SEEK_SET);
754	res = read (fd, buf, count);
755	lseek (fd, ooffset, SEEK_SET);
756	UNLOCK (preadwritelock);
757
758	return res;
759	}
760
761	static ssize_t pwrite (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 = write (fd, buf, count);
770	lseek (fd, offset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775	#endif
776
777	#if !HAVE_FDATASYNC
778	# define fdatasync fsync
779	#endif
780
781	#if !HAVE_READAHEAD
782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
783
784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
785	{
786	dBUF;
787
788	while (count > 0)
789	{
790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
791
792	pread (fd, aio_buf, len, offset);
793	offset += len;
794	count -= len;
795	}
796
797	errno = 0;
798	}
799
800	#endif
801
802	#if !HAVE_READDIR_R
803	# define readdir_r aio_readdir_r
804
805	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
806
807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
808	{
809	struct dirent *e;
810	int errorno;
811
812	LOCK (readdirlock);
813
814	e = readdir (dirp);
815	errorno = errno;
816
817	if (e)
818	{
819	*res = ent;
820	strcpy (ent->d_name, e->d_name);
821	}
822	else
823	*res = 0;
824
825	UNLOCK (readdirlock);
826
827	errno = errorno;
828	return e ? 0 : -1;
829	}
830	#endif
831
832	/* sendfile always needs emulation */
833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
834	{
835	ssize_t res;
836
837	if (!count)
838	return 0;
839
840	#if HAVE_SENDFILE
841	# if __linux
842	res = sendfile (ofd, ifd, &offset, count);
843
844	# elif __freebsd
845	/*
846	* Of course, the freebsd sendfile is a dire hack with no thoughts
847	* wasted on making it similar to other I/O functions.
848	*/
849	{
850	off_t sbytes;
851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853	if (res < 0 && sbytes)
854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855	res = sbytes;
856	}
857
858	# elif __hpux
859	res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861	# elif __solaris
862	{
863	struct sendfilevec vec;
864	size_t sbytes;
865
866	vec.sfv_fd = ifd;
867	vec.sfv_flag = 0;
868	vec.sfv_off = offset;
869	vec.sfv_len = count;
870
871	res = sendfilev (ofd, &vec, 1, &sbytes);
872
873	if (res < 0 && sbytes)
874	res = sbytes;
875	}
876
877	# endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882
883	if (res < 0
884	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885	#if __solaris
886	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
887	#endif
888	)
889	)
890	{
891	/* emulate sendfile. this is a major pain in the ass */
892	dBUF;
893
894	res = 0;
895
896	while (count)
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901
902	if (cnt <= 0)
903	{
904	if (cnt && !res) res = -1;
905	break;
906	}
907
908	cnt = write (ofd, aio_buf, cnt);
909
910	if (cnt <= 0)
911	{
912	if (cnt && !res) res = -1;
913	break;
914	}
915
916	offset += cnt;
917	res += cnt;
918	count -= cnt;
919	}
920	}
921
922	return res;
923	}
924
925	/* read a full directory */
926	static void scandir_ (aio_req req, worker *self)
927	{
928	DIR *dirp;
929	union
930	{
931	struct dirent d;
932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
933	} *u;
934	struct dirent *entp;
935	char *name, *names;
936	int memlen = 4096;
937	int memofs = 0;
938	int res = 0;
939	int errorno;
940
941	LOCK (wrklock);
942	self->dirp = dirp = opendir (req->dataptr);
943	self->dbuf = u = malloc (sizeof (*u));
944	req->data2ptr = names = malloc (memlen);
945	UNLOCK (wrklock);
946
947	if (dirp && u && names)
948	for (;;)
949	{
950	errno = 0;
951	readdir_r (dirp, &u->d, &entp);
952
953	if (!entp)
954	break;
955
956	name = entp->d_name;
957
958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
959	{
960	int len = strlen (name) + 1;
961
962	res++;
963
964	while (memofs + len > memlen)
965	{
966	memlen *= 2;
967	LOCK (wrklock);
968	req->data2ptr = names = realloc (names, memlen);
969	UNLOCK (wrklock);
970
971	if (!names)
972	break;
973	}
974
975	memcpy (names + memofs, name, len);
976	memofs += len;
977	}
978	}
979
980	if (errno)
981	res = -1;
982
983	req->result = res;
984	}
985
986	/*****************************************************************************/
987
988	static void *aio_proc (void *thr_arg)
989	{
990	aio_req req;
991	struct timespec ts;
992	worker *self = (worker *)thr_arg;
993
994	/* try to distribute timeouts somewhat evenly */
995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
996	* (1000000000UL / 1024UL);
997
998	for (;;)
999	{
1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1001
1002	LOCK (reqlock);
1003
1004	for (;;)
1005	{
1006	self->req = req = reqq_shift (&req_queue);
1007
1008	if (req)
1009	break;
1010
1011	++idle;
1012
1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1014	== ETIMEDOUT)
1015	{
1016	if (idle > max_idle)
1017	{
1018	--idle;
1019	UNLOCK (reqlock);
1020	LOCK (wrklock);
1021	--started;
1022	UNLOCK (wrklock);
1023	goto quit;
1024	}
1025
1026	/* we are allowed to idle, so do so without any timeout */
1027	pthread_cond_wait (&reqwait, &reqlock);
1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1029	}
1030
1031	--idle;
1032	}
1033
1034	--nready;
1035
1036	UNLOCK (reqlock);
1037
1038	errno = 0; /* strictly unnecessary */
1039
1040	if (!(req->flags & FLAG_CANCELLED))
1041	switch (req->type)
1042	{
1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1045
1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1048
1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1052
1053	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1054	case REQ_CLOSE: req->result = close (req->fd); break;
1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1061
1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
1064	case REQ_READDIR: scandir_ (req, self); break;
1065
1066	case REQ_BUSY:
1067	{
1068	struct timeval tv;
1069
1070	tv.tv_sec = req->fd;
1071	tv.tv_usec = req->fd2;
1072
1073	req->result = select (0, 0, 0, 0, &tv);
1074	}
1075
1076	case REQ_GROUP:
1077	case REQ_NOP:
1078	break;
1079
1080	case REQ_QUIT:
1081	goto quit;
1082
1083	default:
1084	req->result = ENOSYS;
1085	break;
1086	}
1087
1088	req->errorno = errno;
1089
1090	LOCK (reslock);
1091
1092	++npending;
1093
1094	if (!reqq_push (&res_queue, req))
1095	/* write a dummy byte to the pipe so fh becomes ready */
1096	write (respipe [1], &respipe, 1);
1097
1098	self->req = 0;
1099	worker_clear (self);
1100
1101	UNLOCK (reslock);
1102	}
1103
1104	quit:
1105	LOCK (wrklock);
1106	worker_free (self);
1107	UNLOCK (wrklock);
1108
1109	return 0;
1110	}
1111
1112	/*****************************************************************************/
1113
1114	static void atfork_prepare (void)
1115	{
1116	LOCK (wrklock);
1117	LOCK (reqlock);
1118	LOCK (reslock);
1119	#if !HAVE_PREADWRITE
1120	LOCK (preadwritelock);
1121	#endif
1122	#if !HAVE_READDIR_R
1123	LOCK (readdirlock);
1124	#endif
1125	}
1126
1127	static void atfork_parent (void)
1128	{
1129	#if !HAVE_READDIR_R
1130	UNLOCK (readdirlock);
1131	#endif
1132	#if !HAVE_PREADWRITE
1133	UNLOCK (preadwritelock);
1134	#endif
1135	UNLOCK (reslock);
1136	UNLOCK (reqlock);
1137	UNLOCK (wrklock);
1138	}
1139
1140	static void atfork_child (void)
1141	{
1142	aio_req prv;
1143
1144	while (prv = reqq_shift (&req_queue))
1145	req_free (prv);
1146
1147	while (prv = reqq_shift (&res_queue))
1148	req_free (prv);
1149
1150	while (wrk_first.next != &wrk_first)
1151	{
1152	worker *wrk = wrk_first.next;
1153
1154	if (wrk->req)
1155	req_free (wrk->req);
1156
1157	worker_clear (wrk);
1158	worker_free (wrk);
1159	}
1160
1161	started = 0;
1162	idle = 0;
1163	nreqs = 0;
1164	nready = 0;
1165	npending = 0;
1166
1167	close (respipe [0]);
1168	close (respipe [1]);
1169	create_pipe ();
1170
1171	atfork_parent ();
1172	}
1173
1174	#define dREQ \
1175	aio_req req; \
1176	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
1178	\
1179	if (SvOK (callback) && !SvROK (callback)) \
1180	croak ("callback must be undef or of reference type"); \
1181	\
1182	Newz (0, req, 1, aio_cb); \
1183	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \
1185	\
1186	req->callback = newSVsv (callback); \
1187	req->pri = req_pri
1188
1189	#define REQ_SEND \
1190	req_send (req); \
1191	\
1192	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1194
1195	MODULE = IO::AIO PACKAGE = IO::AIO	849	MODULE = IO::AIO PACKAGE = IO::AIO
1196		850
1197	PROTOTYPES: ENABLE	851	PROTOTYPES: ENABLE
1198		852
1199	BOOT:	853	BOOT:
1200	{	854	{
		855	static const struct {
		856	const char *name;
		857	IV iv;
		858	} *civ, const_iv[] = {
		859	# define const_niv(name, value) { # name, (IV) value },
		860	# define const_iv(name) { # name, (IV) name },
		861	# define const_eio(name) { # name, (IV) EIO_ ## name },
		862
		863	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		864
		865	const_iv (ENOSYS)
		866	const_iv (EXDEV)
		867	const_iv (EBADR)
		868
		869	const_iv (O_RDONLY)
		870	const_iv (O_WRONLY)
		871	const_iv (O_RDWR)
		872	const_iv (O_CREAT)
		873	const_iv (O_TRUNC)
		874	const_iv (O_EXCL)
		875	const_iv (O_APPEND)
		876
		877	const_iv (O_ASYNC)
		878	const_iv (O_DIRECT)
		879	const_iv (O_NOATIME)
		880
		881	const_iv (O_CLOEXEC)
		882	const_iv (O_NOCTTY)
		883	const_iv (O_NOFOLLOW)
		884	const_iv (O_NONBLOCK)
		885	const_iv (O_EXEC)
		886	const_iv (O_SEARCH)
		887	const_iv (O_DIRECTORY)
		888	const_iv (O_DSYNC)
		889	const_iv (O_RSYNC)
		890	const_iv (O_SYNC)
		891	const_iv (O_TTY_INIT)
		892
		893	const_iv (S_IFIFO)
		894	const_iv (S_IFCHR)
		895	const_iv (S_IFBLK)
		896	const_iv (S_IFLNK)
		897	const_iv (S_IFREG)
		898	const_iv (S_IFDIR)
		899	const_iv (S_IFWHT)
		900	const_iv (S_IFSOCK)
		901	const_iv (S_IFMT)
		902
		903	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		904	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		905	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		906	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		907	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		908	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		909
		910	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		911	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		912	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		913	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		914	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		915
		916	const_iv (ST_RDONLY)
		917	const_iv (ST_NOSUID)
		918	const_iv (ST_NODEV)
		919	const_iv (ST_NOEXEC)
		920	const_iv (ST_SYNCHRONOUS)
		921	const_iv (ST_MANDLOCK)
		922	const_iv (ST_WRITE)
		923	const_iv (ST_APPEND)
		924	const_iv (ST_IMMUTABLE)
		925	const_iv (ST_NOATIME)
		926	const_iv (ST_NODIRATIME)
		927	const_iv (ST_RELATIME)
		928
		929	const_iv (PROT_NONE)
		930	const_iv (PROT_EXEC)
		931	const_iv (PROT_READ)
		932	const_iv (PROT_WRITE)
		933
		934	/*const_iv (MAP_FIXED)*/
		935	const_iv (MAP_PRIVATE)
		936	const_iv (MAP_SHARED)
		937	const_iv (MAP_ANONYMOUS)
		938
		939	/* linuxish */
		940	const_iv (MAP_HUGETLB)
		941	const_iv (MAP_LOCKED)
		942	const_iv (MAP_NORESERVE)
		943	const_iv (MAP_POPULATE)
		944	const_iv (MAP_NONBLOCK)
		945
		946	const_iv (FIEMAP_FLAG_SYNC)
		947	const_iv (FIEMAP_FLAG_XATTR)
		948	const_iv (FIEMAP_FLAGS_COMPAT)
		949	const_iv (FIEMAP_EXTENT_LAST)
		950	const_iv (FIEMAP_EXTENT_UNKNOWN)
		951	const_iv (FIEMAP_EXTENT_DELALLOC)
		952	const_iv (FIEMAP_EXTENT_ENCODED)
		953	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		954	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		955	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		956	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		957	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		958	const_iv (FIEMAP_EXTENT_MERGED)
		959	const_iv (FIEMAP_EXTENT_SHARED)
		960
		961	const_iv (SPLICE_F_MOVE)
		962	const_iv (SPLICE_F_NONBLOCK)
		963	const_iv (SPLICE_F_MORE)
		964	const_iv (SPLICE_F_GIFT)
		965
		966	const_iv (SEEK_DATA)
		967	const_iv (SEEK_HOLE)
		968
		969	/* libeio constants */
		970	const_eio (SEEK_SET)
		971	const_eio (SEEK_CUR)
		972	const_eio (SEEK_END)
		973
		974	const_eio (MCL_FUTURE)
		975	const_eio (MCL_CURRENT)
		976
		977	const_eio (MS_ASYNC)
		978	const_eio (MS_INVALIDATE)
		979	const_eio (MS_SYNC)
		980
		981	const_eio (MT_MODIFY)
		982
		983	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		984	const_eio (SYNC_FILE_RANGE_WRITE)
		985	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		986
		987	const_eio (FALLOC_FL_KEEP_SIZE)
		988
		989	const_eio (READDIR_DENTS)
		990	const_eio (READDIR_DIRS_FIRST)
		991	const_eio (READDIR_STAT_ORDER)
		992	const_eio (READDIR_FOUND_UNKNOWN)
		993
		994	const_eio (DT_UNKNOWN)
		995	const_eio (DT_FIFO)
		996	const_eio (DT_CHR)
		997	const_eio (DT_DIR)
		998	const_eio (DT_BLK)
		999	const_eio (DT_REG)
		1000	const_eio (DT_LNK)
		1001	const_eio (DT_SOCK)
		1002	const_eio (DT_WHT)
		1003	};
		1004
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	1005	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1006	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1007	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1008	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1202		1009
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1010	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1011	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1209		1012
1210	create_pipe ();	1013	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1212	}
1213		1014
		1015	reinit ();
		1016	}
		1017
1214	void	1018	void
1215	min_parallel (int nthreads)	1019	reinit ()
1216	PROTOTYPE: $	1020	PROTOTYPE:
1217		1021
1218	void	1022	void
1219	max_parallel (int nthreads)	1023	max_poll_reqs (unsigned int nreqs)
1220	PROTOTYPE: $
1221
1222	int
1223	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	1024	PROTOTYPE: $
1225	CODE:	1025	CODE:
1226	RETVAL = max_outstanding;	1026	eio_set_max_poll_reqs (nreqs);
		1027
		1028	void
		1029	max_poll_time (double nseconds)
		1030	PROTOTYPE: $
		1031	CODE:
		1032	eio_set_max_poll_time (nseconds);
		1033
		1034	void
		1035	min_parallel (unsigned int nthreads)
		1036	PROTOTYPE: $
		1037	CODE:
		1038	eio_set_min_parallel (nthreads);
		1039
		1040	void
		1041	max_parallel (unsigned int nthreads)
		1042	PROTOTYPE: $
		1043	CODE:
		1044	eio_set_max_parallel (nthreads);
		1045
		1046	void
		1047	max_idle (unsigned int nthreads)
		1048	PROTOTYPE: $
		1049	CODE:
		1050	eio_set_max_idle (nthreads);
		1051
		1052	void
		1053	idle_timeout (unsigned int seconds)
		1054	PROTOTYPE: $
		1055	CODE:
		1056	eio_set_idle_timeout (seconds);
		1057
		1058	void
		1059	max_outstanding (unsigned int maxreqs)
		1060	PROTOTYPE: $
		1061	CODE:
1227	max_outstanding = maxreqs;	1062	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		1063
1231	void	1064	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1065	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1233	SV * pathname
1234	int flags
1235	int mode
1236	SV * callback
1237	PROTOTYPE: $$$;$
1238	PPCODE:	1066	PPCODE:
1239	{	1067	{
1240	dREQ;	1068	dREQ;
1241		1069
1242	req->type = REQ_OPEN;	1070	req->type = EIO_WD_OPEN;
1243	req->data = newSVsv (pathname);	1071	req_set_path1 (req, pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);
1245	req->fd = flags;
1246	req->mode = mode;
1247		1072
1248	REQ_SEND;	1073	REQ_SEND;
1249	}	1074	}
1250		1075
1251	void	1076	void
		1077	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1078	PPCODE:
		1079	{
		1080	dREQ;
		1081
		1082	req->type = EIO_OPEN;
		1083	req_set_path1 (req, pathname);
		1084	req->int1 = flags;
		1085	req->int2 = mode;
		1086
		1087	REQ_SEND;
		1088	}
		1089
		1090	void
1252	aio_close (fh,callback=&PL_sv_undef)	1091	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$
1256	ALIAS:	1092	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	1093	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	1094	aio_fdatasync = EIO_FDATASYNC
		1095	aio_syncfs = EIO_SYNCFS
1260	PPCODE:	1096	PPCODE:
1261	{	1097	{
		1098	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	1099	dREQ;
1263		1100
1264	req->type = ix;	1101	req->type = ix;
1265	req->fh = newSVsv (fh);	1102	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1103	req->int1 = fd;
1267		1104
1268	REQ_SEND (req);	1105	REQ_SEND;
1269	}	1106	}
1270		1107
1271	void	1108	void
		1109	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1110	PPCODE:
		1111	{
		1112	int fd = s_fileno_croak (fh, 0);
		1113	dREQ;
		1114
		1115	req->type = EIO_SYNC_FILE_RANGE;
		1116	req->sv1 = newSVsv (fh);
		1117	req->int1 = fd;
		1118	req->offs = offset;
		1119	req->size = nbytes;
		1120	req->int2 = flags;
		1121
		1122	REQ_SEND;
		1123	}
		1124
		1125	void
		1126	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1127	PPCODE:
		1128	{
		1129	int fd = s_fileno_croak (fh, 0);
		1130	dREQ;
		1131
		1132	req->type = EIO_FALLOCATE;
		1133	req->sv1 = newSVsv (fh);
		1134	req->int1 = fd;
		1135	req->int2 = mode;
		1136	req->offs = offset;
		1137	req->size = len;
		1138
		1139	REQ_SEND;
		1140	}
		1141
		1142	void
		1143	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1144	PPCODE:
		1145	{
		1146	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1147	int fd = s_fileno_croak (fh, 0);
		1148	dREQ;
		1149
		1150	if (expect_false (close_fd < 0))
		1151	{
		1152	int pipefd [2];
		1153
		1154	if (
		1155	#ifdef _WIN32
		1156	_pipe (pipefd, 1, _O_BINARY) < 0
		1157	#else
		1158	pipe (pipefd) < 0
		1159	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1160	#endif
		1161	|| close (pipefd [1]) < 0
		1162	)
		1163	abort (); /*D*/
		1164
		1165	close_fd = pipefd [0];
		1166	}
		1167
		1168	req->type = EIO_DUP2;
		1169	req->int1 = close_fd;
		1170	req->sv2 = newSVsv (fh);
		1171	req->int2 = fd;
		1172
		1173	REQ_SEND;
		1174	}
		1175
		1176	void
		1177	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1178	PPCODE:
		1179	{
		1180	int fd = s_fileno_croak (fh, 0);
		1181	dREQ;
		1182
		1183	req->type = EIO_SEEK;
		1184	req->sv1 = newSVsv (fh);
		1185	req->int1 = fd;
		1186	req->offs = SvVAL64 (offset);
		1187	req->int2 = whence;
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1193	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1273	SV * fh
1274	UV offset
1275	UV length
1276	SV * data
1277	UV dataoffset
1278	SV * callback
1279	ALIAS:	1194	ALIAS:
1280	aio_read = REQ_READ	1195	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	1196	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$
1283	PPCODE:	1197	PPCODE:
1284	{	1198	{
1285	aio_req req;
1286	STRLEN svlen;	1199	STRLEN svlen;
		1200	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	1201	char *svptr = SvPVbyte (data, svlen);
1288		1202	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		1203
1292	if (dataoffset < 0)	1204	if (dataoffset < 0)
1293	dataoffset += svlen;	1205	dataoffset += svlen;
1294		1206
1295	if (dataoffset < 0 || dataoffset > svlen)	1207	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	1208	croak ("dataoffset outside of data scalar");
1297		1209
1298	if (ix == REQ_WRITE)	1210	if (ix == EIO_WRITE)
1299	{	1211	{
1300	/* write: check length and adjust. */	1212	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	1213	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	1214	len = svlen - dataoffset;
1303	}	1215	}
1304	else	1216	else
1305	{	1217	{
1306	/* read: grow scalar as necessary */	1218	/* read: check type and grow scalar as necessary */
		1219	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	1220	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	1221	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		1222
1313	{	1223	{
1314	dREQ;	1224	dREQ;
1315		1225
1316	req->type = ix;	1226	req->type = ix;
1317	req->fh = newSVsv (fh);	1227	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1228	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	1229	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	1230	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	1231	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	1232	req->ptr2 = (char *)svptr + dataoffset;
		1233	req->stroffset = dataoffset;
1324		1234
1325	if (!SvREADONLY (data))	1235	if (!SvREADONLY (data))
1326	{	1236	{
1327	SvREADONLY_on (data);	1237	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	1238	req->flags |= FLAG_SV2_RO_OFF;
1329	}	1239	}
1330		1240
1331	REQ_SEND;	1241	REQ_SEND;
1332	}	1242	}
1333	}	1243	}
1334		1244
1335	void	1245	void
1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1246	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1337	SV * out_fh	1247	ALIAS:
1338	SV * in_fh	1248	aio_readlink = EIO_READLINK
1339	UV in_offset	1249	aio_realpath = EIO_REALPATH
1340	UV length
1341	SV * callback
1342	PROTOTYPE: $$$$;$
1343	PPCODE:	1250	PPCODE:
1344	{	1251	{
		1252	dREQ;
		1253
		1254	req->type = ix;
		1255	req_set_path1 (req, pathname);
		1256
		1257	REQ_SEND;
		1258	}
		1259
		1260	void
		1261	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1262	PPCODE:
		1263	{
		1264	int ifd = s_fileno_croak (in_fh , 0);
		1265	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	1266	dREQ;
1346		1267
1347	req->type = REQ_SENDFILE;	1268	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	1269	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1270	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	1271	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1272	req->int2 = ifd;
1352	req->offset = in_offset;	1273	req->offs = in_offset;
1353	req->length = length;	1274	req->size = length;
1354		1275
1355	REQ_SEND;	1276	REQ_SEND;
1356	}	1277	}
1357		1278
1358	void	1279	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1280	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$
1365	PPCODE:	1281	PPCODE:
1366	{	1282	{
		1283	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	1284	dREQ;
1368		1285
1369	req->type = REQ_READAHEAD;	1286	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	1287	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1288	req->int1 = fd;
1372	req->offset = offset;	1289	req->offs = offset;
1373	req->length = length;	1290	req->size = length;
1374		1291
1375	REQ_SEND;	1292	REQ_SEND;
1376	}	1293	}
1377		1294
1378	void	1295	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	1296	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	1297	ALIAS:
1383	aio_stat = REQ_STAT	1298	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	1299	aio_lstat = EIO_LSTAT
		1300	aio_statvfs = EIO_STATVFS
1385	PPCODE:	1301	PPCODE:
1386	{	1302	{
1387	dREQ;	1303	dREQ;
1388		1304
1389	New (0, req->statdata, 1, Stat_t);	1305	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1390	if (!req->statdata)
1391	{
1392	req_free (req);
1393	croak ("out of memory during aio_req->statdata allocation");
1394	}
1395
1396	if (SvPOK (fh_or_path))
1397	{
1398	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);
1401	}
1402	else
1403	{
1404	req->type = REQ_FSTAT;
1405	req->fh = newSVsv (fh_or_path);
1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}
1408		1306
1409	REQ_SEND;	1307	REQ_SEND;
1410	}	1308	}
1411		1309
		1310	UV
		1311	major (UV dev)
		1312	ALIAS:
		1313	minor = 1
		1314	CODE:
		1315	RETVAL = ix ? major (dev) : minor (dev);
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	UV
		1320	makedev (UV maj, UV min)
		1321	CODE:
		1322	RETVAL = makedev (maj, min);
		1323	OUTPUT:
		1324	RETVAL
		1325
1412	void	1326	void
		1327	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1328	PPCODE:
		1329	{
		1330	dREQ;
		1331
		1332	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1333	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1334	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1335
		1336	REQ_SEND;
		1337	}
		1338
		1339	void
		1340	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1341	PPCODE:
		1342	{
		1343	dREQ;
		1344
		1345	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1346	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1347
		1348	REQ_SEND;
		1349	}
		1350
		1351	void
		1352	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1353	PPCODE:
		1354	{
		1355	dREQ;
		1356
		1357	req->int2 = mode;
		1358	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1359
		1360	REQ_SEND;
		1361	}
		1362
		1363	void
		1364	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1365	PPCODE:
		1366	{
		1367	dREQ;
		1368
		1369	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1370	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1371	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1372
		1373	REQ_SEND;
		1374	}
		1375
		1376	void
		1377	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1378	PPCODE:
		1379	{
		1380	dREQ;
		1381
		1382	req->type = EIO_READDIR;
		1383	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1384
		1385	if (flags & EIO_READDIR_DENTS)
		1386	req->int1 |= EIO_READDIR_CUSTOM2;
		1387
		1388	req_set_path1 (req, pathname);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->type = EIO_MKDIR;
		1400	req->int2 = mode;
		1401	req_set_path1 (req, pathname);
		1402
		1403	REQ_SEND;
		1404	}
		1405
		1406	void
1413	aio_unlink (pathname,callback=&PL_sv_undef)	1407	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	1408	ALIAS:
1417	aio_unlink = REQ_UNLINK	1409	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	1410	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	1411	aio_readdir = EIO_READDIR
1420	PPCODE:	1412	PPCODE:
1421	{	1413	{
1422	dREQ;	1414	dREQ;
1423		1415
1424	req->type = ix;	1416	req->type = ix;
1425	req->data = newSVsv (pathname);	1417	req_set_path1 (req, pathname);
1426	req->dataptr = SvPVbyte_nolen (req->data);	1418
1427
1428	REQ_SEND;	1419	REQ_SEND;
1429	}	1420	}
1430		1421
1431	void	1422	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1423	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:	1424	ALIAS:
1437	aio_link = REQ_LINK	1425	aio_link = EIO_LINK
1438	aio_symlink = REQ_SYMLINK	1426	aio_symlink = EIO_SYMLINK
1439	aio_rename = REQ_RENAME	1427	aio_rename = EIO_RENAME
1440	PPCODE:	1428	PPCODE:
1441	{	1429	{
		1430	eio_wd wd2 = 0;
1442	dREQ;	1431	dREQ;
1443		1432
1444	req->type = ix;	1433	req->type = ix;
1445	req->fh = newSVsv (oldpath);	1434	req_set_path1 (req, oldpath);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	1435	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1447	req->data = newSVsv (newpath);	1436	req->int3 = (long)wd2;
1448	req->dataptr = SvPVbyte_nolen (req->data);
1449		1437
1450	REQ_SEND;	1438	REQ_SEND;
1451	}	1439	}
1452		1440
1453	void	1441	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1442	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1455	SV * pathname
1456	SV * callback
1457	UV mode
1458	UV dev
1459	PPCODE:	1443	PPCODE:
1460	{	1444	{
1461	dREQ;	1445	dREQ;
1462		1446
1463	req->type = REQ_MKNOD;	1447	req->type = EIO_MKNOD;
1464	req->data = newSVsv (pathname);
1465	req->dataptr = SvPVbyte_nolen (req->data);
1466	req->mode = (mode_t)mode;	1448	req->int2 = (mode_t)mode;
1467	req->offset = dev;	1449	req->offs = dev;
		1450	req_set_path1 (req, pathname);
1468		1451
1469	REQ_SEND;	1452	REQ_SEND;
1470	}	1453	}
1471		1454
1472	void	1455	void
		1456	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1457	ALIAS:
		1458	aio_mtouch = EIO_MTOUCH
		1459	aio_msync = EIO_MSYNC
		1460	PPCODE:
		1461	{
		1462	STRLEN svlen;
		1463	char *svptr = SvPVbyte (data, svlen);
		1464	UV len = SvUV (length);
		1465
		1466	if (offset < 0)
		1467	offset += svlen;
		1468
		1469	if (offset < 0 || offset > svlen)
		1470	croak ("offset outside of scalar");
		1471
		1472	if (!SvOK (length) || len + offset > svlen)
		1473	len = svlen - offset;
		1474
		1475	{
		1476	dREQ;
		1477
		1478	req->type = ix;
		1479	req->sv2 = SvREFCNT_inc (data);
		1480	req->ptr2 = (char *)svptr + offset;
		1481	req->size = len;
		1482	req->int1 = flags;
		1483
		1484	REQ_SEND;
		1485	}
		1486	}
		1487
		1488	void
		1489	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1490	PPCODE:
		1491	{
		1492	STRLEN svlen;
		1493	char *svptr = SvPVbyte (data, svlen);
		1494	UV len = SvUV (length);
		1495
		1496	if (offset < 0)
		1497	offset += svlen;
		1498
		1499	if (offset < 0 || offset > svlen)
		1500	croak ("offset outside of scalar");
		1501
		1502	if (!SvOK (length) || len + offset > svlen)
		1503	len = svlen - offset;
		1504
		1505	{
		1506	dREQ;
		1507
		1508	req->type = EIO_MLOCK;
		1509	req->sv2 = SvREFCNT_inc (data);
		1510	req->ptr2 = (char *)svptr + offset;
		1511	req->size = len;
		1512
		1513	REQ_SEND;
		1514	}
		1515	}
		1516
		1517	void
		1518	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1519	PPCODE:
		1520	{
		1521	dREQ;
		1522
		1523	req->type = EIO_MLOCKALL;
		1524	req->int1 = flags;
		1525
		1526	REQ_SEND;
		1527	}
		1528
		1529	void
		1530	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1531	PPCODE:
		1532	{
		1533	int fd = s_fileno_croak (fh, 0);
		1534	dREQ;
		1535
		1536	req->type = EIO_CUSTOM;
		1537	req->sv1 = newSVsv (fh);
		1538	req->int1 = fd;
		1539
		1540	req->feed = fiemap;
		1541	#if HAVE_FIEMAP
		1542	/* keep our fingers crossed that the next two types are 64 bit */
		1543	req->offs = start;
		1544	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1545	req->int2 = flags;
		1546	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1547	#endif
		1548
		1549	REQ_SEND;
		1550	}
		1551
		1552	void
1473	aio_busy (delay,callback=&PL_sv_undef)	1553	aio_busy (double delay, SV *callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:	1554	PPCODE:
1477	{	1555	{
1478	dREQ;	1556	dREQ;
1479		1557
1480	req->type = REQ_BUSY;	1558	req->type = EIO_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;	1559	req->nv1 = delay < 0. ? 0. : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483		1560
1484	REQ_SEND;	1561	REQ_SEND;
1485	}	1562	}
1486		1563
1487	void	1564	void
1488	aio_group (callback=&PL_sv_undef)	1565	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$
1491	PPCODE:	1566	PPCODE:
1492	{	1567	{
1493	dREQ;	1568	dREQ;
1494		1569
1495	req->type = REQ_GROUP;	1570	req->type = EIO_GROUP;
		1571
1496	req_send (req);	1572	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1573	XPUSHs (req_sv (req, aio_grp_stash));
1499	}	1574	}
1500		1575
1501	void	1576	void
1502	aio_nop (callback=&PL_sv_undef)	1577	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1578	ALIAS:
		1579	aio_nop = EIO_NOP
		1580	aio_sync = EIO_SYNC
1504	PPCODE:	1581	PPCODE:
1505	{	1582	{
1506	dREQ;	1583	dREQ;
1507		1584
1508	req->type = REQ_NOP;	1585	req->type = ix;
1509		1586
1510	REQ_SEND;	1587	REQ_SEND;
1511	}	1588	}
1512		1589
1513	int	1590	int
1514	aioreq_pri (int pri = 0)	1591	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$
1516	CODE:	1592	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1593	RETVAL = next_pri;
1518	if (items > 0)	1594	if (items > 0)
1519	{	1595	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1596	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1597	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1598	next_pri = pri;
1523	}	1599	}
1524	OUTPUT:	1600	OUTPUT:
1525	RETVAL	1601	RETVAL
1526		1602
1527	void	1603	void
1528	aioreq_nice (int nice = 0)	1604	aioreq_nice (int nice = 0)
1529	CODE:	1605	CODE:
1530	nice = next_pri - nice;	1606	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1607	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1608	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1609	next_pri = nice;
1534		1610
1535	void	1611	void
1536	flush ()	1612	flush ()
		1613	CODE:
		1614	while (eio_nreqs ())
		1615	{
		1616	poll_wait ();
		1617	poll_cb ();
		1618	}
		1619
		1620	int
		1621	poll ()
		1622	CODE:
		1623	poll_wait ();
		1624	RETVAL = poll_cb ();
		1625	OUTPUT:
		1626	RETVAL
		1627
		1628	int
		1629	poll_fileno ()
		1630	CODE:
		1631	RETVAL = s_epipe_fd (&respipe);
		1632	OUTPUT:
		1633	RETVAL
		1634
		1635	int
		1636	poll_cb (...)
1537	PROTOTYPE:	1637	PROTOTYPE:
1538	CODE:	1638	CODE:
1539	while (nreqs)
1540	{
1541	poll_wait ();
1542	poll_cb (0);	1639	RETVAL = poll_cb ();
1543	}
1544
1545	void
1546	poll()
1547	PROTOTYPE:
1548	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();
1552	poll_cb (0);
1553	}
1554
1555	int
1556	poll_fileno()
1557	PROTOTYPE:
1558	CODE:
1559	RETVAL = respipe [0];
1560	OUTPUT:	1640	OUTPUT:
1561	RETVAL	1641	RETVAL
1562		1642
		1643	void
		1644	poll_wait ()
		1645	CODE:
		1646	poll_wait ();
		1647
1563	int	1648	int
1564	poll_cb(...)	1649	nreqs ()
1565	PROTOTYPE:
1566	CODE:	1650	CODE:
1567	RETVAL = poll_cb (0);	1651	RETVAL = eio_nreqs ();
1568	OUTPUT:	1652	OUTPUT:
1569	RETVAL	1653	RETVAL
1570		1654
1571	int	1655	int
1572	poll_some(int max = 0)	1656	nready ()
1573	PROTOTYPE: $
1574	CODE:	1657	CODE:
1575	RETVAL = poll_cb (max);	1658	RETVAL = eio_nready ();
1576	OUTPUT:	1659	OUTPUT:
1577	RETVAL	1660	RETVAL
1578		1661
1579	void	1662	int
1580	poll_wait()	1663	npending ()
1581	PROTOTYPE:
1582	CODE:	1664	CODE:
1583	if (nreqs)	1665	RETVAL = eio_npending ();
1584	poll_wait ();
1585
1586	int
1587	nreqs()
1588	PROTOTYPE:
1589	CODE:
1590	RETVAL = nreqs;
1591	OUTPUT:	1666	OUTPUT:
1592	RETVAL	1667	RETVAL
1593		1668
1594	int	1669	int
1595	nready()	1670	nthreads ()
1596	PROTOTYPE:
1597	CODE:	1671	CODE:
1598	RETVAL = get_nready ();	1672	RETVAL = eio_nthreads ();
1599	OUTPUT:	1673	OUTPUT:
1600	RETVAL	1674	RETVAL
1601		1675
1602	int	1676	int
1603	npending()	1677	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1604	PROTOTYPE:	1678	CODE:
		1679	RETVAL = posix_fadvise (fh, offset, length, advice);
		1680	OUTPUT:
		1681	RETVAL
		1682
		1683	IV
		1684	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1685	CODE:
		1686	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	void
		1691	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1692	PPCODE:
		1693	sv_unmagic (scalar, MMAP_MAGIC);
		1694	{
		1695	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1696	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1697	if (addr == (void *)-1)
		1698	XSRETURN_NO;
		1699
		1700	sv_force_normal (scalar);
		1701
		1702	/* we store the length in mg_obj, as namlen is I32 :/ */
		1703	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1704	->mg_obj = (SV *)length;
		1705
		1706	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1707
		1708	if (!(prot & PROT_WRITE))
		1709	SvREADONLY_on (scalar);
		1710
		1711	if (SvLEN (scalar))
		1712	Safefree (SvPVX (scalar));
		1713
		1714	SvPVX (scalar) = (char *)addr;
		1715	SvCUR_set (scalar, length);
		1716	SvLEN_set (scalar, 0);
		1717	SvPOK_only (scalar);
		1718
		1719	XSRETURN_YES;
		1720	}
		1721
		1722	void
		1723	munmap (SV *scalar)
1605	CODE:	1724	CODE:
1606	RETVAL = get_npending ();	1725	sv_unmagic (scalar, MMAP_MAGIC);
		1726
		1727	int
		1728	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1729	ALIAS:
		1730	mprotect = 1
		1731	CODE:
		1732	{
		1733	STRLEN svlen;
		1734	void *addr = SvPVbyte (scalar, svlen);
		1735	size_t len = SvUV (length);
		1736
		1737	if (offset < 0)
		1738	offset += svlen;
		1739
		1740	if (offset < 0 || offset > svlen)
		1741	croak ("offset outside of scalar");
		1742
		1743	if (!SvOK (length) || len + offset > svlen)
		1744	len = svlen - offset;
		1745
		1746	addr = (void *)(((intptr_t)addr) + offset);
		1747	eio_page_align (&addr, &len);
		1748
		1749	switch (ix)
		1750	{
		1751	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1752	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1753	}
		1754	}
1607	OUTPUT:	1755	OUTPUT:
1608	RETVAL	1756	RETVAL
		1757
		1758	int
		1759	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1760	CODE:
		1761	{
		1762	STRLEN svlen;
		1763	void *addr = SvPVbyte (scalar, svlen);
		1764	size_t len = SvUV (length);
		1765
		1766	if (offset < 0)
		1767	offset += svlen;
		1768
		1769	if (offset < 0 || offset > svlen)
		1770	croak ("offset outside of scalar");
		1771
		1772	if (!SvOK (length) || len + offset > svlen)
		1773	len = svlen - offset;
		1774
		1775	addr = (void *)(((intptr_t)addr) + offset);
		1776	eio_page_align (&addr, &len);
		1777	#if _POSIX_MEMLOCK_RANGE
		1778	RETVAL = munlock (addr, len);
		1779	#else
		1780	RETVAL = EIO_ENOSYS ();
		1781	#endif
		1782	}
		1783	OUTPUT:
		1784	RETVAL
		1785
		1786	int
		1787	munlockall ()
		1788	CODE:
		1789	#if _POSIX_MEMLOCK
		1790	munlockall ();
		1791	#else
		1792	RETVAL = EIO_ENOSYS ();
		1793	#endif
		1794	OUTPUT:
		1795	RETVAL
		1796
		1797	int
		1798	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1799	CODE:
		1800	{
		1801	#if HAVE_LINUX_SPLICE
		1802	loff_t off_in_, off_out_;
		1803	RETVAL = splice (
		1804	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1805	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1806	length, flags
		1807	);
		1808	#else
		1809	RETVAL = EIO_ENOSYS ();
		1810	#endif
		1811	}
		1812	OUTPUT:
		1813	RETVAL
		1814
		1815	int
		1816	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1817	CODE:
		1818	#if HAVE_LINUX_SPLICE
		1819	RETVAL = tee (rfh, wfh, length, flags);
		1820	#else
		1821	RETVAL = EIO_ENOSYS ();
		1822	#endif
		1823	OUTPUT:
		1824	RETVAL
		1825
		1826	void _on_next_submit (SV *cb)
		1827	CODE:
		1828	SvREFCNT_dec (on_next_submit);
		1829	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1609		1830
1610	PROTOTYPES: DISABLE	1831	PROTOTYPES: DISABLE
		1832
		1833	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1834
		1835	BOOT:
		1836	{
		1837	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1838	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1839	}
		1840
		1841	void
		1842	DESTROY (SV *self)
		1843	CODE:
		1844	{
		1845	aio_wd wd = SvAIO_WD (self);
		1846	#if HAVE_AT
		1847	{
		1848	SV *callback = &PL_sv_undef;
		1849	dREQ; /* clobbers next_pri :/ */
		1850	next_pri = req->pri; /* restore next_pri */
		1851	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1852	req->type = EIO_WD_CLOSE;
		1853	req->wd = wd;
		1854	REQ_SEND;
		1855	}
		1856	#else
		1857	eio_wd_close_sync (wd);
		1858	#endif
		1859	}
1611		1860
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1861	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1862
1614	void	1863	void
1615	cancel (aio_req_ornot req)	1864	cancel (aio_req_ornot req)
1616	CODE:	1865	CODE:
1617	req_cancel (req);	1866	eio_cancel (req);
1618		1867
1619	void	1868	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1869	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1870	PPCODE:
		1871	{
		1872	if (GIMME_V != G_VOID)
		1873	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1874
		1875	if (items > 1)
		1876	{
		1877	SV *cb_cv =get_cb (callback);
		1878
1622	SvREFCNT_dec (req->callback);	1879	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1880	req->callback = SvREFCNT_inc (cb_cv);
		1881	}
		1882	}
1624		1883
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1884	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1885
1627	void	1886	void
1628	add (aio_req grp, ...)	1887	add (aio_req grp, ...)
1629	PPCODE:	1888	PPCODE:
1630	{	1889	{
1631	int i;	1890	int i;
1632	aio_req req;
1633		1891
1634	if (grp->fd == 2)	1892	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1893	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1894
1637	for (i = 1; i < items; ++i )	1895	for (i = 1; i < items; ++i )
1638	{	1896	{
		1897	aio_req req;
		1898
1639	if (GIMME_V != G_VOID)	1899	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1900	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1901
1642	req = SvAIO_REQ (ST (i));	1902	req = SvAIO_REQ (ST (i));
1643		1903
1644	if (req)	1904	if (req)
1645	{	1905	eio_grp_add (grp, req);
1646	++grp->length;
1647	req->grp = grp;
1648
1649	req->grp_prev = 0;
1650	req->grp_next = grp->grp_first;
1651
1652	if (grp->grp_first)
1653	grp->grp_first->grp_prev = req;
1654
1655	grp->grp_first = req;
1656	}
1657	}	1906	}
1658	}	1907	}
1659		1908
1660	void	1909	void
1661	cancel_subs (aio_req_ornot req)	1910	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1919	AV *av;
1671		1920
1672	grp->errorno = errno;	1921	grp->errorno = errno;
1673		1922
1674	av = newAV ();	1923	av = newAV ();
		1924	av_extend (av, items - 1);
1675		1925
1676	for (i = 1; i < items; ++i )	1926	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1927	av_push (av, newSVsv (ST (i)));
1678		1928
1679	SvREFCNT_dec (grp->data);	1929	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1930	grp->sv1 = (SV *)av;
1681	}	1931	}
1682		1932
1683	void	1933	void
1684	errno (aio_req grp, int errorno = errno)	1934	errno (aio_req grp, int errorno = errno)
1685	CODE:	1935	CODE:
1686	grp->errorno = errorno;	1936	grp->errorno = errorno;
1687		1937
1688	void	1938	void
1689	limit (aio_req grp, int limit)	1939	limit (aio_req grp, int limit)
1690	CODE:	1940	CODE:
1691	grp->fd2 = limit;	1941	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1942
1694	void	1943	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1944	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1945	CODE:
1697	{	1946	{
1698	SvREFCNT_dec (grp->fh2);	1947	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1948	grp->sv2 = newSVsv (callback);
		1949	grp->feed = aio_grp_feed;
1700		1950
1701	if (grp->fd2 <= 0)	1951	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1952	grp->int2 = 2;
1703		1953
1704	aio_grp_feed (grp);	1954	eio_grp_limit (grp, grp->int2);
1705	}	1955	}
1706		1956

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