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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 1.218 by root, Fri Jul 27 17:54:40 2012 UTC

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

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