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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC vs.
Revision 1.233 by root, Thu Jun 25 13:34:28 2015 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
26	#include <limits.h>	16	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	17	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	18	#include <sched.h>
31		19
32	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>
35	# elif __freebsd
36	# include <sys/socket.h>
37	# include <sys/uio.h>	21	# include <sys/mman.h>
38	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. on't complain if this fails for you.
		27	*/
		28	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		29	# include <linux/fs.h>
		30	# ifdef FS_IOC_FIEMAP
		31	# include <linux/types.h>
		32	# include <linux/fiemap.h>
		33	# define HAVE_FIEMAP 1
		34	# endif
		35	#endif
		36
		37	/* perl namespace pollution */
		38	#undef VERSION
		39
		40	/* perl stupidly overrides readdir and maybe others */
		41	/* with thread-unsafe versions, imagine that :( */
		42	#undef readdir
		43	#undef opendir
		44	#undef closedir
		45
		46	#ifdef _WIN32
		47
		48	// perl overrides all those nice libc functions
		49
		50	#undef malloc
		51	#undef free
		52	#undef open
		53	#undef read
		54	#undef write
		55	#undef send
		56	#undef recv
		57	#undef stat
		58	#undef lstat
		59	#undef fstat
		60	#undef truncate
		61	#undef ftruncate
		62	#undef open
		63	#undef link
		64	#undef close
		65	#undef unlink
		66	#undef mkdir
		67	#undef rmdir
		68	#undef rename
		69	#undef lseek
		70	#undef opendir
		71	#undef readdir
		72	#undef closedir
		73	#undef chmod
		74	#undef fchmod
		75	#undef dup
		76	#undef dup2
		77	#undef abort
		78	#undef pipe
		79
		80	#define EIO_STRUCT_STAT struct _stati64
		81	#define EIO_STRUCT_STATI64
		82
		83	#else
		84
39	# include <sys/socket.h>	85	#include <sys/time.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	86	#include <sys/select.h>
		87	#include <unistd.h>
		88	#include <utime.h>
		89	#include <signal.h>
		90
		91	#define EIO_STRUCT_STAT Stat_t
		92
		93	#endif
		94
		95	/*****************************************************************************/
		96
		97	#if __GNUC__ >= 3
		98	# define expect(expr,value) __builtin_expect ((expr),(value))
		99	#else
		100	# define expect(expr,value) (expr)
		101	#endif
		102
		103	#define expect_false(expr) expect ((expr) != 0, 0)
		104	#define expect_true(expr) expect ((expr) != 0, 1)
		105
		106	/*****************************************************************************/
		107
		108	typedef SV SV8; /* byte-sv, used for argument-checking */
		109	typedef int aio_rfd; /* read file desriptor */
		110	typedef int aio_wfd; /* write file descriptor */
		111
		112	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		113
		114	#define EIO_REQ_MEMBERS \
		115	SV *callback; \
		116	SV *sv1, *sv2; \
		117	SV *sv3, *sv4; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	static int req_invoke (eio_req *req);
		127	#define EIO_FINISH(req) req_invoke (req)
		128	static void req_destroy (eio_req *grp);
		129	#define EIO_DESTROY(req) req_destroy (req)
		130
		131	#include "libeio/eio.c"
		132
		133	#if !HAVE_POSIX_FADVISE
		134	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#if !HAVE_POSIX_MADVISE
		138	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		139	#endif
		140
		141	#ifndef MAP_ANONYMOUS
		142	# ifdef MAP_ANON
		143	# define MAP_ANONYMOUS MAP_ANON
42	# else	144	# else
43	# error sendfile support requested but not available	145	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	146	# endif
45	#endif	147	#endif
46		148
47	/* used for struct dirent, AIX doesn't provide it */	149	/* defines all sorts of constants to 0 unless they are already defined */
48	#ifndef NAME_MAX	150	#include "def0.h"
49	# define NAME_MAX 4096
50	#endif
51		151
52	#if __ia64	152	#ifndef makedev
53	# define STACKSIZE 65536	153	# define makedev(maj,min) (((maj) << 8) | (min))
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	154	#endif
		155	#ifndef major
		156	# define major(dev) ((dev) >> 8)
		157	#endif
		158	#ifndef minor
		159	# define minor(dev) ((dev) & 0xff)
		160	#endif
59		161
60	/* buffer size for various temporary buffers */	162	#if PAGESIZE <= 0
61	#define AIO_BUFSIZE 65536	163	# define PAGESIZE sysconf (_SC_PAGESIZE)
		164	#endif
62		165
63	#define dBUF \	166	/*****************************************************************************/
64	char *aio_buf; \	167
65	LOCK (wrklock); \	168	static void
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	169	fiemap (eio_req *req)
67	UNLOCK (wrklock); \	170	{
68	if (!aio_buf) \	171	req->result = -1;
		172
		173	#if HAVE_FIEMAP
		174	/* assume some c99 */
		175	struct fiemap *fiemap = 0;
		176	size_t end_offset;
		177	int count = req->int3;
		178
		179	req->flags |= EIO_FLAG_PTR1_FREE;
		180
		181	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		182	/* increase in 3.5kb steps */
		183	if (count < 0)
		184	count = 8;
		185
		186	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		187	errno = ENOMEM;
		188	if (!fiemap)
69	return -1;	189	return;
70		190
71	enum {	191	req->ptr1 = fiemap;
72	REQ_QUIT,
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};
84		192
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	193	fiemap->fm_start = req->offs;
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	194	fiemap->fm_length = req->size;
		195	fiemap->fm_flags = req->int2;
		196	fiemap->fm_extent_count = count;
87		197
88	typedef struct aio_cb	198	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
89	{	199	return;
90	struct aio_cb *volatile next;
91		200
92	SV *data, *callback;	201	if (req->int3 >= 0 /* not autosizing */
93	SV *fh, *fh2;	202	|| !fiemap->fm_mapped_extents /* no more extents */
94	void *dataptr, *data2ptr;	203	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
95	Stat_t *statdata;	204	goto done;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99		205
100	STRLEN dataoffset;	206	/* else we have to loop -
101	int type;	207	* it would be tempting (actually I tried that first) to just query the
102	int fd, fd2;	208	* number of extents needed, but linux often feels like not returning all
103	int errorno;	209	* extents, without telling us it left any out. this complicates
104	mode_t mode; /* open */	210	* this quite a bit.
		211	*/
105		212
106	unsigned char flags;	213	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
107	unsigned char pri;
108		214
109	SV *self; /* the perl counterpart of this request, if any */	215	for (;;)
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
111	} aio_cb;
112
113	enum {
114	FLAG_CANCELLED = 0x01,
115	};
116
117	typedef aio_cb *aio_req;
118	typedef aio_cb *aio_req_ornot;
119
120	enum {
121	PRI_MIN = -4,
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{	216	{
165	closedir (wrk->dirp);	217	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
166	wrk->dirp = 0;	218	char scratch[3072];
167	}	219	struct fiemap *incmap = (struct fiemap *)scratch;
168		220
169	if (wrk->dbuf)	221	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
170	{	222	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
171	free (wrk->dbuf);	223	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
172	wrk->dbuf = 0;	224	incmap->fm_flags = fiemap->fm_flags;
173	}	225	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
174	}
175		226
176	static void worker_free (worker *wrk)	227	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;	228	return;
223		229
224	--q->size;	230	if (!incmap->fm_mapped_extents)
		231	goto done;
225		232
226	for (pri = NUM_PRI; pri--; )	233	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
227	{	234	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
228	aio_req req = q->qs[pri];	235	errno = ENOMEM;
229
230	if (req)	236	if (!fiemap)
		237	return;
		238
		239	req->ptr1 = fiemap;
		240
		241	for (count = 0; count < incmap->fm_mapped_extents; ++count)
231	{	242	{
232	if (!(q->qs[pri] = req->next))	243	struct fiemap_extent *e = incmap->fm_extents + count;
233	q->qe[pri] = 0;
234		244
235	return req;	245	if (e->fe_logical + e->fe_length >= end_offset)
		246	goto done;
		247
		248	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		249
		250	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		251	goto done;
		252
236	}	253	}
237	}	254	}
238		255
239	abort ();	256	done:
240	}	257	req->result = 0;
241		258
242	static int poll_cb ();	259	#else
243	static void req_invoke (aio_req req);	260	errno = ENOSYS;
		261	#endif
		262	}
		263
		264	/*****************************************************************************/
		265
		266	enum {
		267	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		268	};
		269
		270	typedef eio_req *aio_req;
		271	typedef eio_req *aio_req_ornot;
		272	typedef eio_wd aio_wd;
		273
		274	static SV *on_next_submit;
		275	static int next_pri = EIO_PRI_DEFAULT;
		276	static int max_outstanding;
		277
		278	static s_epipe respipe;
		279
244	static void req_free (aio_req req);	280	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	281	static void req_cancel (aio_req req);
246		282
		283	static void
		284	want_poll (void)
		285	{
		286	/* write a dummy byte to the pipe so fh becomes ready */
		287	s_epipe_signal (&respipe);
		288	}
		289
		290	static void
		291	done_poll (void)
		292	{
		293	/* read any signals sent by the worker threads */
		294	s_epipe_drain (&respipe);
		295	}
		296
247	/* must be called at most once */	297	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	298	static SV *
		299	req_sv (aio_req req, HV *stash)
249	{	300	{
250	if (!req->self)	301	if (!req->self)
251	{	302	{
252	req->self = (SV *)newHV ();	303	req->self = (SV *)newHV ();
253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254	}	305	}
255		306
256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	307	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
257	}	308	}
258		309
259	static aio_req SvAIO_REQ (SV *sv)	310	static SV *
		311	newSVaio_wd (aio_wd wd)
		312	{
		313	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		314	}
		315
		316	static aio_req
		317	SvAIO_REQ (SV *sv)
260	{	318	{
261	MAGIC *mg;	319	MAGIC *mg;
262		320
263	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	321	if (!SvROK (sv)
		322	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		323	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		324	&& SvSTASH (SvRV (sv)) != aio_req_stash
		325	&& !sv_derived_from (sv, "IO::AIO::REQ")))
264	croak ("object of class " AIO_REQ_KLASS " expected");	326	croak ("object of class IO::AIO::REQ expected");
265		327
266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	328	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267		329
268	return mg ? (aio_req)mg->mg_ptr : 0;	330	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	331	}
270		332
		333	static aio_wd
		334	SvAIO_WD (SV *sv)
		335	{
		336	if (!SvROK (sv)
		337	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		338	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		339	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		340
		341	return (aio_wd)(long)SvIVX (SvRV (sv));
		342	}
		343
		344	static SV *
		345	newmortalFH (int fd, int flags)
		346	{
		347	if (fd < 0)
		348	return &PL_sv_undef;
		349
		350	GV *gv = (GV *)sv_newmortal ();
		351	char sym[64];
		352	int symlen;
		353
		354	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		355	gv_init (gv, aio_stash, sym, symlen, 0);
		356
		357	symlen = snprintf (
		358	sym,
		359	sizeof (sym),
		360	"%s&=%d",
		361	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		362	fd
		363	);
		364
		365	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		366	? (SV *)gv : &PL_sv_undef;
		367	}
		368
		369	static void
271	static void aio_grp_feed (aio_req grp)	370	aio_grp_feed (aio_req grp)
272	{	371	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	372	if (grp->sv2 && SvOK (grp->sv2))
274	{	373	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	374	dSP;
280		375
281	ENTER;	376	ENTER;
282	SAVETMPS;	377	SAVETMPS;
283	PUSHMARK (SP);	378	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	379	XPUSHs (req_sv (grp, aio_grp_stash));
285	PUTBACK;	380	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	381	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	382	SPAGAIN;
288	FREETMPS;	383	FREETMPS;
289	LEAVE;	384	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	385	}
300	}	386	}
301		387
302	static void aio_grp_dec (aio_req grp)	388	static void
		389	req_submit (eio_req *req)
303	{	390	{
304	--grp->length;	391	eio_submit (req);
305		392
306	/* call feeder, if applicable */	393	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	394	{
312	req_invoke (grp);	395	dSP;
313	req_free (grp);	396	SV *cb = sv_2mortal (on_next_submit);
		397
		398	on_next_submit = 0;
		399
		400	PUSHMARK (SP);
		401	PUTBACK;
		402	call_sv (cb, G_DISCARD | G_EVAL);
314	}	403	}
315	}	404	}
316		405
317	static void poll_wait ()	406	static int
		407	req_invoke (eio_req *req)
318	{	408	{
319	fd_set rfd;	409	if (req->flags & FLAG_SV2_RO_OFF)
		410	SvREADONLY_off (req->sv2);
320		411
321	while (nreqs)	412	if (!EIO_CANCELLED (req) && req->callback)
322	{	413	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;	414	dSP;
345		415	static SV *sv_result_cache; /* caches the result integer SV */
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	416	SV *sv_result;
347	{
348	errno = req->errorno;
349		417
350	ENTER;	418	ENTER;
351	SAVETMPS;	419	SAVETMPS;
352	PUSHMARK (SP);	420	PUSHMARK (SP);
353	EXTEND (SP, 1);	421	EXTEND (SP, 1);
354		422
		423	/* do not recreate the result IV from scratch each time */
		424	if (expect_true (sv_result_cache))
		425	{
		426	sv_result = sv_result_cache; sv_result_cache = 0;
		427	SvIV_set (sv_result, req->result);
		428	SvIOK_only (sv_result);
		429	}
		430	else
		431	{
		432	sv_result = newSViv (req->result);
		433	SvREADONLY_on (sv_result);
		434	}
		435
355	switch (req->type)	436	switch (req->type)
356	{	437	{
		438	case EIO_WD_OPEN:
		439	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		440	break;
		441
357	case REQ_READDIR:	442	case EIO_READDIR:
358	{	443	{
359	SV *rv = &PL_sv_undef;	444	SV *rv = &PL_sv_undef;
360		445
361	if (req->result >= 0)	446	if (req->result >= 0)
362	{	447	{
363	int i;	448	int i;
364	char *buf = req->data2ptr;	449	char *names = (char *)req->ptr2;
		450	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
365	AV *av = newAV ();	451	AV *av = newAV ();
366		452
367	av_extend (av, req->result - 1);	453	av_extend (av, req->result - 1);
368		454
369	for (i = 0; i < req->result; ++i)	455	for (i = 0; i < req->result; ++i)
370	{	456	{
371	SV *sv = newSVpv (buf, 0);	457	if (req->int1 & EIO_READDIR_DENTS)
		458	{
		459	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
372		460
		461	if (req->int1 & EIO_READDIR_CUSTOM2)
		462	{
		463	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		464	AV *avent = newAV ();
		465
		466	av_extend (avent, 2);
		467
		468	if (!sv_type [ent->type])
		469	{
		470	sv_type [ent->type] = newSViv (ent->type);
		471	SvREADONLY_on (sv_type [ent->type]);
		472	}
		473
		474	av_store (avent, 0, namesv);
		475	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		476	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		477
		478	av_store (av, i, newRV_noinc ((SV *)avent));
		479	}
		480	else
373	av_store (av, i, sv);	481	av_store (av, i, namesv);
		482
		483	++ent;
		484	}
		485	else
		486	{
		487	SV *name = newSVpv (names, 0);
		488	av_store (av, i, name);
374	buf += SvCUR (sv) + 1;	489	names += SvCUR (name) + 1;
		490	}
375	}	491	}
376		492
377	rv = sv_2mortal (newRV_noinc ((SV *)av));	493	rv = sv_2mortal (newRV_noinc ((SV *)av));
378	}	494	}
379		495
380	PUSHs (rv);	496	PUSHs (rv);
		497
		498	if (req->int1 & EIO_READDIR_CUSTOM1)
		499	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
381	}	500	}
382	break;	501	break;
383		502
384	case REQ_OPEN:	503	case EIO_OPEN:
		504	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		505	break;
		506
		507	case EIO_STATVFS:
		508	case EIO_FSTATVFS:
385	{	509	{
386	/* convert fd to fh */	510	SV *rv = &PL_sv_undef;
387	SV *fh;	511
		512	#ifndef _WIN32
		513	if (req->result >= 0)
		514	{
		515	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		516	HV *hv = newHV ();
		517	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		518	* chooses to make it a struct.
		519	*/
		520	unsigned long fsid = 0;
		521	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
388		522
389	PUSHs (sv_2mortal (newSViv (req->result)));	523	rv = sv_2mortal (newRV_noinc ((SV *)hv));
390	PUTBACK;
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
392	SPAGAIN;
393		524
394	fh = SvREFCNT_inc (POPs);	525	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		526	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		527	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		528	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		529	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		530	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		531	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		532	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		533	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		534	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		535	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		536	}
		537	#endif
395		538
396	PUSHMARK (SP);	539	PUSHs (rv);
397	XPUSHs (sv_2mortal (fh));
398	}	540	}
		541
399	break;	542	break;
400		543
401	case REQ_GROUP:	544	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	545	req->int1 = 2; /* mark group as finished */
403		546
404	if (req->data)	547	if (req->sv1)
405	{	548	{
406	int i;	549	int i;
407	AV *av = (AV *)req->data;	550	AV *av = (AV *)req->sv1;
408		551
409	EXTEND (SP, AvFILL (av) + 1);	552	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	553	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	554	PUSHs (*av_fetch (av, i, 0));
412	}	555	}
413	break;	556	break;
414		557
415	case REQ_NOP:	558	case EIO_NOP:
416	case REQ_BUSY:	559	case EIO_BUSY:
417	break;	560	break;
418		561
		562	case EIO_READLINK:
		563	case EIO_REALPATH:
		564	if (req->result > 0)
		565	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		566	break;
		567
		568	case EIO_STAT:
		569	case EIO_LSTAT:
		570	case EIO_FSTAT:
		571	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		572
		573	if (!(PL_laststatval = req->result))
		574	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		575	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		576
		577	PUSHs (sv_result);
		578	break;
		579
		580	case EIO_SEEK:
		581	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		582	break;
		583
		584	case EIO_READ:
		585	{
		586	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		587	*SvEND (req->sv2) = 0;
		588	SvPOK_only (req->sv2);
		589	SvSETMAGIC (req->sv2);
		590	PUSHs (sv_result);
		591	}
		592	break;
		593
		594	case EIO_CUSTOM:
		595	if (req->feed == fiemap)
		596	{
		597	#if HAVE_FIEMAP
		598	if (!req->result)
		599	{
		600	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		601
		602	if (fiemap->fm_extent_count)
		603	{
		604	AV *av = newAV ();
		605	int i;
		606
		607	while (fiemap->fm_mapped_extents)
		608	{
		609	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		610	AV *ext_av = newAV ();
		611
		612	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		613	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		614	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		615	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		616
		617	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		618	}
		619
		620	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		621	}
		622	else
		623	{
		624	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		625	PUSHs (sv_result);
		626	}
		627	}
		628	#endif
		629	}
		630	else
		631	PUSHs (sv_result);
		632	break;
		633
		634	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		635	if (req->result > 0)
		636	SvIV_set (sv_result, 0);
		637	/* FALLTHROUGH */
		638
419	default:	639	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	640	PUSHs (sv_result);
421	break;	641	break;
422	}	642	}
423		643
		644	errno = req->errorno;
424		645
425	PUTBACK;	646	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	647	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	648	SPAGAIN;
		649
		650	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		651	SvREFCNT_dec (sv_result);
		652	else
		653	sv_result_cache = sv_result;
428		654
429	FREETMPS;	655	FREETMPS;
430	LEAVE;	656	LEAVE;
		657
		658	PUTBACK;
431	}	659	}
432		660
433	if (req->grp)	661	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	662	}
453		663
454	static void req_free (aio_req req)	664	static void
		665	req_destroy (aio_req req)
455	{	666	{
456	if (req->self)	667	if (req->self)
457	{	668	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	669	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	670	SvREFCNT_dec (req->self);
460	}	671	}
461		672
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	673	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	674	SvREFCNT_dec (req->sv2);
		675	SvREFCNT_dec (req->sv3);
		676	SvREFCNT_dec (req->sv4);
465	SvREFCNT_dec (req->callback);	677	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467		678
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470
471	Safefree (req);	679	free (req);
472	}	680	}
473		681
		682	static void
474	static void req_cancel_subs (aio_req grp)	683	req_cancel_subs (aio_req grp)
475	{	684	{
476	aio_req sub;
477
478	if (grp->type != REQ_GROUP)	685	if (grp->type != EIO_GROUP)
479	return;	686	return;
480		687
481	SvREFCNT_dec (grp->fh2);	688	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	689	grp->sv2 = 0;
483		690
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	691	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	692	}
487		693
488	static void req_cancel (aio_req req)	694	static void ecb_cold
		695	create_respipe (void)
489	{	696	{
490	req->flags |= FLAG_CANCELLED;	697	if (s_epipe_renew (&respipe))
491		698	croak ("IO::AIO: unable to initialize result pipe");
492	req_cancel_subs (req);
493	}	699	}
494		700
495	static int poll_cb ()	701	static void
		702	poll_wait (void)
496	{	703	{
497	dSP;	704	while (eio_nreqs ())
498	int count = 0;	705	{
499	int do_croak = 0;	706	int size;
500	aio_req req;
501		707
		708	X_LOCK (reslock);
		709	size = res_queue.size;
		710	X_UNLOCK (reslock);
		711
		712	if (size)
		713	return;
		714
		715	etp_maybe_start_thread ();
		716
		717	s_epipe_wait (&respipe);
		718	}
		719	}
		720
		721	static int
		722	poll_cb (void)
		723	{
502	for (;;)	724	for (;;)
503	{	725	{
504	LOCK (reslock);	726	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		727
507	if (req)	728	if (res > 0)
		729	croak (0);
		730
		731	if (!max_outstanding || max_outstanding > eio_nreqs ())
		732	return res;
		733
		734	poll_wait ();
		735	}
		736	}
		737
		738	static void ecb_cold
		739	reinit (void)
		740	{
		741	create_respipe ();
		742
		743	if (eio_init (want_poll, done_poll) < 0)
		744	croak ("IO::AIO: unable to initialise eio library");
		745	}
		746
		747	/*****************************************************************************/
		748
		749	#if !_POSIX_MAPPED_FILES
		750	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		751	# define munmap(addr,length) EIO_ENOSYS ()
		752	#endif
		753
		754	#if !_POSIX_MEMORY_PROTECTION
		755	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		756	# define PROT_NONE 0
		757	# define PROT_WRITE 0
		758	# define MAP_PRIVATE 0
		759	# define MAP_SHARED 0
		760	# define MAP_FIXED 0
		761	#endif
		762
		763	#define MMAP_MAGIC PERL_MAGIC_ext
		764
		765	static int ecb_cold
		766	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		767	{
		768	int old_errno = errno;
		769	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		770	errno = old_errno;
		771
		772	mg->mg_obj = 0; /* just in case */
		773
		774	SvREADONLY_off (sv);
		775
		776	if (SvPVX (sv) != mg->mg_ptr)
		777	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		778
		779	SvCUR_set (sv, 0);
		780	SvPVX (sv) = 0;
		781	SvOK_off (sv);
		782
		783	return 0;
		784	}
		785
		786	static MGVTBL mmap_vtbl = {
		787	0, 0, 0, 0, mmap_free
		788	};
		789
		790	/*****************************************************************************/
		791
		792	static SV *
		793	get_cb (SV *cb_sv)
		794	{
		795	SvGETMAGIC (cb_sv);
		796	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		797	}
		798
		799	static aio_req ecb_noinline
		800	dreq (SV *callback)
		801	{
		802	SV *cb_cv;
		803	aio_req req;
		804	int req_pri = next_pri;
		805	next_pri = EIO_PRI_DEFAULT;
		806
		807	cb_cv = get_cb (callback);
		808
		809	req = calloc (sizeof (*req), 1);
		810	if (!req)
		811	croak ("out of memory during eio_req allocation");
		812
		813	req->callback = SvREFCNT_inc (cb_cv);
		814	req->pri = req_pri;
		815
		816	return req;
		817	}
		818
		819	#define dREQ \
		820	aio_req req = dreq (callback); \
		821
		822	#define REQ_SEND \
		823	PUTBACK; \
		824	req_submit (req); \
		825	SPAGAIN; \
		826	\
		827	if (GIMME_V != G_VOID) \
		828	XPUSHs (req_sv (req, aio_req_stash));
		829
		830	ecb_inline void
		831	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		832	{
		833	if (expect_false (SvROK (path)))
		834	{
		835	SV *rv = SvRV (path);
		836	SV *wdob;
		837
		838	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
508	{	839	{
509	if (!res_queue.size)	840	path = AvARRAY (rv)[1];
		841	wdob = AvARRAY (rv)[0];
		842
		843	if (SvOK (wdob))
510	{	844	{
511	/* read any signals sent by the worker threads */	845	*wd = SvAIO_WD (wdob);
512	char buf [32];	846	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}	847	}
		848	else
		849	*wd = EIO_INVALID_WD;
516	}	850	}
517		851	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
518	UNLOCK (reslock);
519
520	if (!req)
521	break;
522
523	--nreqs;
524
525	if (req->type == REQ_QUIT)
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{	852	{
529	req->fd = 1; /* mark request as delayed */	853	*wd = (aio_wd)(long)SvIVX (rv);
530	continue;	854	*wdsv = SvREFCNT_inc_NN (rv);
		855	*ptr = ".";
		856	return; /* path set to "." */
531	}	857	}
532	else	858	else
533	{	859	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	860	}
554		861
555	return count;	862	*pathsv = newSVsv (path);
		863	*ptr = SvPVbyte_nolen (*pathsv);
556	}	864	}
557		865
558	static void *aio_proc(void *arg);	866	static void ecb_noinline
559		867	req_set_path1 (aio_req req, SV *path)
560	static void start_thread (void)
561	{	868	{
562	sigset_t fullsigset, oldsigset;	869	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
563	pthread_attr_t attr;	870	}
564		871
565	worker *wrk = calloc (1, sizeof (worker));	872	static void ecb_noinline
		873	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		874	{
		875	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
566		876
567	if (!wrk)	877	switch (SvTYPE (rv))
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{	878	{
581	wrk->prev = &wrk_first;	879	case SVt_PVIO:
582	wrk->next = wrk_first.next;	880	case SVt_PVLV:
583	wrk_first.next->prev = wrk;	881	case SVt_PVGV:
584	wrk_first.next = wrk;	882	req->type = type_fh;
585	started++;	883	req->sv1 = newSVsv (fh_or_path);
		884	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		885	break;
		886
		887	default:
		888	req->type = type_path;
		889	req_set_path1 (req, fh_or_path);
		890	break;
586	}	891	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}	892	}
593		893
594	static void req_send (aio_req req)	894	XS(boot_IO__AIO) ecb_cold;
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598		895
599	++nreqs;	896	MODULE = IO::AIO PACKAGE = IO::AIO
600		897
601	LOCK (reqlock);	898	PROTOTYPES: ENABLE
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606		899
607	static void end_thread (void)	900	BOOT:
608	{	901	{
609	aio_req req;	902	static const struct {
		903	const char *name;
		904	IV iv;
		905	} *civ, const_iv[] = {
		906	# define const_niv(name, value) { # name, (IV) value },
		907	# define const_iv(name) { # name, (IV) name },
		908	# define const_eio(name) { # name, (IV) EIO_ ## name },
610		909
611	Newz (0, req, 1, aio_cb);	910	/* you have to re-run ./gendef0 after adding/Removing any constants here */
612		911
613	req->type = REQ_QUIT;	912	const_iv (ENOSYS)
614	req->pri = PRI_MAX + PRI_BIAS;	913	const_iv (EXDEV)
		914	const_iv (EBADR)
615		915
616	req_send (req);	916	const_iv (O_RDONLY)
617	}	917	const_iv (O_WRONLY)
		918	const_iv (O_RDWR)
		919	const_iv (O_CREAT)
		920	const_iv (O_TRUNC)
		921	const_iv (O_EXCL)
		922	const_iv (O_APPEND)
618		923
619	static void min_parallel (int nthreads)	924	const_iv (O_ASYNC)
620	{	925	const_iv (O_DIRECT)
621	if (wanted < nthreads)	926	const_iv (O_NOATIME)
622	wanted = nthreads;
623	}
624		927
625	static void max_parallel (int nthreads)	928	const_iv (O_CLOEXEC)
626	{	929	const_iv (O_NOCTTY)
627	int cur = started;	930	const_iv (O_NOFOLLOW)
		931	const_iv (O_NONBLOCK)
		932	const_iv (O_EXEC)
		933	const_iv (O_SEARCH)
		934	const_iv (O_DIRECTORY)
		935	const_iv (O_DSYNC)
		936	const_iv (O_RSYNC)
		937	const_iv (O_SYNC)
		938	const_iv (O_TTY_INIT)
628		939
629	if (wanted > nthreads)	940	const_iv (S_IFIFO)
630	wanted = nthreads;	941	const_iv (S_IFCHR)
		942	const_iv (S_IFBLK)
		943	const_iv (S_IFLNK)
		944	const_iv (S_IFREG)
		945	const_iv (S_IFDIR)
		946	const_iv (S_IFWHT)
		947	const_iv (S_IFSOCK)
		948	const_iv (S_IFMT)
631		949
632	while (cur > wanted)	950	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
633	{	951	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
634	end_thread ();	952	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
635	cur--;	953	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
636	}	954	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		955	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
637		956
638	while (started > wanted)	957	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
639	{	958	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
640	poll_wait ();	959	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
641	poll_cb ();	960	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
642	}	961	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
643	}
644		962
645	static void create_pipe ()	963	const_iv (ST_RDONLY)
646	{	964	const_iv (ST_NOSUID)
647	if (pipe (respipe))	965	const_iv (ST_NODEV)
648	croak ("unable to initialize result pipe");	966	const_iv (ST_NOEXEC)
		967	const_iv (ST_SYNCHRONOUS)
		968	const_iv (ST_MANDLOCK)
		969	const_iv (ST_WRITE)
		970	const_iv (ST_APPEND)
		971	const_iv (ST_IMMUTABLE)
		972	const_iv (ST_NOATIME)
		973	const_iv (ST_NODIRATIME)
		974	const_iv (ST_RELATIME)
649		975
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	976	const_iv (PROT_NONE)
651	croak ("cannot set result pipe to nonblocking mode");	977	const_iv (PROT_EXEC)
		978	const_iv (PROT_READ)
		979	const_iv (PROT_WRITE)
652		980
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	981	/*const_iv (MAP_FIXED)*/
654	croak ("cannot set result pipe to nonblocking mode");	982	const_iv (MAP_PRIVATE)
655	}	983	const_iv (MAP_SHARED)
		984	const_iv (MAP_ANONYMOUS)
656		985
657	/*****************************************************************************/	986	/* linuxish */
658	/* work around various missing functions */	987	const_iv (MAP_HUGETLB)
		988	const_iv (MAP_LOCKED)
		989	const_iv (MAP_NORESERVE)
		990	const_iv (MAP_POPULATE)
		991	const_iv (MAP_NONBLOCK)
659		992
660	#if !HAVE_PREADWRITE	993	const_iv (FIEMAP_FLAG_SYNC)
661	# define pread aio_pread	994	const_iv (FIEMAP_FLAG_XATTR)
662	# define pwrite aio_pwrite	995	const_iv (FIEMAP_FLAGS_COMPAT)
		996	const_iv (FIEMAP_EXTENT_LAST)
		997	const_iv (FIEMAP_EXTENT_UNKNOWN)
		998	const_iv (FIEMAP_EXTENT_DELALLOC)
		999	const_iv (FIEMAP_EXTENT_ENCODED)
		1000	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1001	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1002	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1003	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1004	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1005	const_iv (FIEMAP_EXTENT_MERGED)
		1006	const_iv (FIEMAP_EXTENT_SHARED)
663		1007
664	/*	1008	const_iv (SPLICE_F_MOVE)
665	* make our pread/pwrite safe against themselves, but not against	1009	const_iv (SPLICE_F_NONBLOCK)
666	* normal read/write by using a mutex. slows down execution a lot,	1010	const_iv (SPLICE_F_MORE)
667	* but that's your problem, not mine.	1011	const_iv (SPLICE_F_GIFT)
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670		1012
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1013	const_iv (SEEK_DATA)
672	{	1014	const_iv (SEEK_HOLE)
673	ssize_t res;
674	off_t ooffset;
675		1015
676	LOCK (preadwritelock);	1016	/* libeio constants */
677	ooffset = lseek (fd, 0, SEEK_CUR);	1017	const_eio (SEEK_SET)
678	lseek (fd, offset, SEEK_SET);	1018	const_eio (SEEK_CUR)
679	res = read (fd, buf, count);	1019	const_eio (SEEK_END)
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682		1020
683	return res;	1021	const_eio (MCL_FUTURE)
684	}	1022	const_eio (MCL_CURRENT)
685		1023
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1024	const_eio (MS_ASYNC)
687	{	1025	const_eio (MS_INVALIDATE)
688	ssize_t res;	1026	const_eio (MS_SYNC)
689	off_t ooffset;
690		1027
691	LOCK (preadwritelock);	1028	const_eio (MT_MODIFY)
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697		1029
698	return res;	1030	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
699	}	1031	const_eio (SYNC_FILE_RANGE_WRITE)
700	#endif	1032	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
701		1033
702	#if !HAVE_FDATASYNC	1034	const_eio (FALLOC_FL_KEEP_SIZE)
703	# define fdatasync fsync	1035	const_eio (FALLOC_FL_PUNCH_HOLE)
704	#endif	1036	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1037	const_eio (FALLOC_FL_ZERO_RANGE)
705		1038
706	#if !HAVE_READAHEAD	1039	const_eio (READDIR_DENTS)
707	# define readahead aio_readahead	1040	const_eio (READDIR_DIRS_FIRST)
		1041	const_eio (READDIR_STAT_ORDER)
		1042	const_eio (READDIR_FOUND_UNKNOWN)
708		1043
709	static ssize_t readahead (int fd, off_t offset, size_t count)	1044	const_eio (DT_UNKNOWN)
710	{	1045	const_eio (DT_FIFO)
711	dBUF;	1046	const_eio (DT_CHR)
712		1047	const_eio (DT_DIR)
713	while (count > 0)	1048	const_eio (DT_BLK)
714	{	1049	const_eio (DT_REG)
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	1050	const_eio (DT_LNK)
716		1051	const_eio (DT_SOCK)
717	pread (fd, aio_buf, len, offset);	1052	const_eio (DT_WHT)
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}	1053	};
781		1054
782	# elif __hpux	1055	aio_stash = gv_stashpv ("IO::AIO" , 1);
783	res = sendfile (ofd, ifd, offset, count, 0, 0);	1056	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1057	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1058	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
784		1059
785	# elif __solaris	1060	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
786	{	1061	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
787	struct sendfilevec vec;
788	size_t sbytes;
789		1062
790	vec.sfv_fd = ifd;	1063	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794		1064
795	res = sendfilev (ofd, &vec, 1, &sbytes);	1065	reinit ();
		1066	}
796		1067
797	if (res < 0 && sbytes)	1068	void
		1069	reinit ()
		1070	PROTOTYPE:
		1071
		1072	void
		1073	max_poll_reqs (unsigned int nreqs)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_max_poll_reqs (nreqs);
		1077
		1078	void
		1079	max_poll_time (double nseconds)
		1080	PROTOTYPE: $
		1081	CODE:
		1082	eio_set_max_poll_time (nseconds);
		1083
		1084	void
		1085	min_parallel (unsigned int nthreads)
		1086	PROTOTYPE: $
		1087	CODE:
		1088	eio_set_min_parallel (nthreads);
		1089
		1090	void
		1091	max_parallel (unsigned int nthreads)
		1092	PROTOTYPE: $
		1093	CODE:
		1094	eio_set_max_parallel (nthreads);
		1095
		1096	void
		1097	max_idle (unsigned int nthreads)
		1098	PROTOTYPE: $
		1099	CODE:
		1100	eio_set_max_idle (nthreads);
		1101
		1102	void
		1103	idle_timeout (unsigned int seconds)
		1104	PROTOTYPE: $
		1105	CODE:
		1106	eio_set_idle_timeout (seconds);
		1107
		1108	void
		1109	max_outstanding (unsigned int maxreqs)
		1110	PROTOTYPE: $
		1111	CODE:
		1112	max_outstanding = maxreqs;
		1113
		1114	void
		1115	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->type = EIO_WD_OPEN;
		1121	req_set_path1 (req, pathname);
		1122
		1123	REQ_SEND;
		1124	}
		1125
		1126	void
		1127	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1128	PPCODE:
		1129	{
		1130	dREQ;
		1131
		1132	req->type = EIO_OPEN;
		1133	req_set_path1 (req, pathname);
		1134	req->int1 = flags;
		1135	req->int2 = mode;
		1136
		1137	REQ_SEND;
		1138	}
		1139
		1140	void
		1141	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1142	ALIAS:
		1143	aio_fsync = EIO_FSYNC
		1144	aio_fdatasync = EIO_FDATASYNC
		1145	aio_syncfs = EIO_SYNCFS
		1146	PPCODE:
		1147	{
		1148	int fd = s_fileno_croak (fh, 0);
		1149	dREQ;
		1150
		1151	req->type = ix;
		1152	req->sv1 = newSVsv (fh);
		1153	req->int1 = fd;
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	int fd = s_fileno_croak (fh, 0);
		1163	dREQ;
		1164
		1165	req->type = EIO_SYNC_FILE_RANGE;
		1166	req->sv1 = newSVsv (fh);
		1167	req->int1 = fd;
		1168	req->offs = offset;
798	res = sbytes;	1169	req->size = nbytes;
799	}	1170	req->int2 = flags;
800		1171
801	# endif	1172	REQ_SEND;
		1173	}
		1174
		1175	void
		1176	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1177	PPCODE:
		1178	{
		1179	int fd = s_fileno_croak (fh, 0);
		1180	dREQ;
		1181
		1182	req->type = EIO_FALLOCATE;
		1183	req->sv1 = newSVsv (fh);
		1184	req->int1 = fd;
		1185	req->int2 = mode;
		1186	req->offs = offset;
		1187	req->size = len;
		1188
		1189	REQ_SEND;
		1190	}
		1191
		1192	void
		1193	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1194	PPCODE:
		1195	{
		1196	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1197	int fd = s_fileno_croak (fh, 0);
		1198	dREQ;
		1199
		1200	if (expect_false (close_fd < 0))
		1201	{
		1202	int pipefd [2];
		1203
		1204	if (
		1205	#ifdef _WIN32
		1206	_pipe (pipefd, 1, _O_BINARY) < 0
802	#else	1207	#else
803	res = -1;	1208	pipe (pipefd) < 0
804	errno = ENOSYS;	1209	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
805	#endif	1210	#endif
806		1211	|| close (pipefd [1]) < 0
807	if (res < 0
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817
818	res = 0;
819
820	while (count)
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826	if (cnt <= 0)
827	{	1212	)
828	if (cnt && !res) res = -1;	1213	abort (); /*D*/
829	break;
830	}
831		1214
832	cnt = write (ofd, aio_buf, cnt);	1215	close_fd = pipefd [0];
833
834	if (cnt <= 0)
835	{
836	if (cnt && !res) res = -1;
837	break;
838	}
839
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;
847	}
848
849	/* read a full directory */
850	static void scandir_ (aio_req req, worker *self)
851	{
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}	1216	}
903	}
904		1217
905	if (errno)	1218	req->type = EIO_DUP2;
906	res = -1;	1219	req->int1 = close_fd;
907		1220	req->sv2 = newSVsv (fh);
908	req->result = res;	1221	req->int2 = fd;
909	}
910		1222
911	/*****************************************************************************/	1223	REQ_SEND;
912
913	static void *aio_proc (void *thr_arg)
914	{
915	aio_req req;
916	int type;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}	1224	}
1004		1225
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)
1034	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();
1060
1061	atfork_parent ();
1062	}
1063
1064	#define dREQ \
1065	aio_req req; \
1066	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
1068	\
1069	if (SvOK (callback) && !SvROK (callback)) \
1070	croak ("callback must be undef or of reference type"); \
1071	\
1072	Newz (0, req, 1, aio_cb); \
1073	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \
1075	\
1076	req->callback = newSVsv (callback); \
1077	req->pri = req_pri
1078
1079	#define REQ_SEND \
1080	req_send (req); \
1081	\
1082	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084
1085	MODULE = IO::AIO PACKAGE = IO::AIO
1086
1087	PROTOTYPES: ENABLE
1088
1089	BOOT:
1090	{
1091	HV *stash = gv_stashpv ("IO::AIO", 1);
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1095
1096	create_pipe ();
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1098	}
1099
1100	void	1226	void
1101	min_parallel (nthreads)	1227	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1102	int nthreads	1228	PPCODE:
1103	PROTOTYPE: $
1104
1105	void
1106	max_parallel (nthreads)
1107	int nthreads
1108	PROTOTYPE: $
1109
1110	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$
1117	PPCODE:
1118	{	1229	{
		1230	int fd = s_fileno_croak (fh, 0);
1119	dREQ;	1231	dREQ;
1120		1232
1121	req->type = REQ_OPEN;	1233	req->type = EIO_SEEK;
1122	req->data = newSVsv (pathname);	1234	req->sv1 = newSVsv (fh);
1123	req->dataptr = SvPVbyte_nolen (req->data);	1235	req->int1 = fd;
1124	req->fd = flags;	1236	req->offs = SvVAL64 (offset);
1125	req->mode = mode;	1237	req->int2 = whence;
1126		1238
1127	REQ_SEND;	1239	REQ_SEND;
1128	}	1240	}
1129		1241
1130	void	1242	void
1131	aio_close (fh,callback=&PL_sv_undef)	1243	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$
1135	ALIAS:	1244	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC
1139	PPCODE:
1140	{
1141	dREQ;
1142
1143	req->type = ix;
1144	req->fh = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146
1147	REQ_SEND (req);
1148	}
1149
1150	void
1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:
1159	aio_read = REQ_READ	1245	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	1246	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$
1162	PPCODE:	1247	PPCODE:
1163	{	1248	{
1164	aio_req req;
1165	STRLEN svlen;	1249	STRLEN svlen;
		1250	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1166	char *svptr = SvPVbyte (data, svlen);	1251	char *svptr = SvPVbyte (data, svlen);
1167		1252	UV len = SvUV (length);
1168	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);
1170		1253
1171	if (dataoffset < 0)	1254	if (dataoffset < 0)
1172	dataoffset += svlen;	1255	dataoffset += svlen;
1173		1256
1174	if (dataoffset < 0 || dataoffset > svlen)	1257	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	1258	croak ("dataoffset outside of data scalar");
1176		1259
1177	if (ix == REQ_WRITE)	1260	if (ix == EIO_WRITE)
1178	{	1261	{
1179	/* write: check length and adjust. */	1262	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	1263	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	1264	len = svlen - dataoffset;
1182	}	1265	}
1183	else	1266	else
1184	{	1267	{
1185	/* read: grow scalar as necessary */	1268	/* read: check type and grow scalar as necessary */
		1269	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1186	svptr = SvGROW (data, length + dataoffset);	1270	svptr = sv_grow (data, len + dataoffset + 1);
		1271	else if (SvCUR (data) < len + dataoffset)
		1272	croak ("length + dataoffset outside of scalar, and cannot grow");
1187	}	1273	}
1188
1189	if (length < 0)
1190	croak ("length must not be negative");
1191		1274
1192	{	1275	{
1193	dREQ;	1276	dREQ;
1194		1277
1195	req->type = ix;	1278	req->type = ix;
1196	req->fh = newSVsv (fh);	1279	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1280	req->int1 = fd;
1198	: IoOFP (sv_2io (fh)));	1281	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	1282	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	1283	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	1284	req->ptr2 = (char *)svptr + dataoffset;
		1285	req->stroffset = dataoffset;
1203		1286
1204	if (!SvREADONLY (data))	1287	if (!SvREADONLY (data))
1205	{	1288	{
1206	SvREADONLY_on (data);	1289	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	1290	req->flags |= FLAG_SV2_RO_OFF;
1208	}	1291	}
1209		1292
1210	REQ_SEND;	1293	REQ_SEND;
1211	}	1294	}
1212	}	1295	}
1213		1296
1214	void	1297	void
1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1298	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1216	SV * out_fh	1299	ALIAS:
1217	SV * in_fh	1300	aio_readlink = EIO_READLINK
1218	UV in_offset	1301	aio_realpath = EIO_REALPATH
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$
1222	PPCODE:	1302	PPCODE:
1223	{	1303	{
		1304	dREQ;
		1305
		1306	req->type = ix;
		1307	req_set_path1 (req, pathname);
		1308
		1309	REQ_SEND;
		1310	}
		1311
		1312	void
		1313	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1314	PPCODE:
		1315	{
		1316	int ifd = s_fileno_croak (in_fh , 0);
		1317	int ofd = s_fileno_croak (out_fh, 1);
1224	dREQ;	1318	dREQ;
1225		1319
1226	req->type = REQ_SENDFILE;	1320	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	1321	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1322	req->int1 = ofd;
1229	req->fh2 = newSVsv (in_fh);	1323	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1324	req->int2 = ifd;
1231	req->offset = in_offset;	1325	req->offs = in_offset;
1232	req->length = length;	1326	req->size = length;
1233		1327
1234	REQ_SEND;	1328	REQ_SEND;
1235	}	1329	}
1236		1330
1237	void	1331	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1332	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$
1244	PPCODE:	1333	PPCODE:
1245	{	1334	{
		1335	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	1336	dREQ;
1247		1337
1248	req->type = REQ_READAHEAD;	1338	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	1339	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1340	req->int1 = fd;
1251	req->offset = offset;	1341	req->offs = offset;
1252	req->length = length;	1342	req->size = length;
1253		1343
1254	REQ_SEND;	1344	REQ_SEND;
1255	}	1345	}
1256		1346
1257	void	1347	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	1348	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	1349	ALIAS:
1262	aio_stat = REQ_STAT	1350	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	1351	aio_lstat = EIO_LSTAT
		1352	aio_statvfs = EIO_STATVFS
1264	PPCODE:	1353	PPCODE:
1265	{	1354	{
1266	dREQ;	1355	dREQ;
1267		1356
1268	New (0, req->statdata, 1, Stat_t);	1357	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1269	if (!req->statdata)
1270	{
1271	req_free (req);
1272	croak ("out of memory during aio_req->statdata allocation");
1273	}
1274
1275	if (SvPOK (fh_or_path))
1276	{
1277	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);
1280	}
1281	else
1282	{
1283	req->type = REQ_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}
1287		1358
1288	REQ_SEND;	1359	REQ_SEND;
1289	}	1360	}
1290		1361
		1362	UV
		1363	major (UV dev)
		1364	ALIAS:
		1365	minor = 1
		1366	CODE:
		1367	RETVAL = ix ? major (dev) : minor (dev);
		1368	OUTPUT:
		1369	RETVAL
		1370
		1371	UV
		1372	makedev (UV maj, UV min)
		1373	CODE:
		1374	RETVAL = makedev (maj, min);
		1375	OUTPUT:
		1376	RETVAL
		1377
1291	void	1378	void
		1379	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1380	PPCODE:
		1381	{
		1382	dREQ;
		1383
		1384	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1385	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1386	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1387
		1388	REQ_SEND;
		1389	}
		1390
		1391	void
		1392	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1393	PPCODE:
		1394	{
		1395	dREQ;
		1396
		1397	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1398	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1399
		1400	REQ_SEND;
		1401	}
		1402
		1403	void
		1404	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1405	PPCODE:
		1406	{
		1407	dREQ;
		1408
		1409	req->int2 = mode;
		1410	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1411
		1412	REQ_SEND;
		1413	}
		1414
		1415	void
		1416	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1417	PPCODE:
		1418	{
		1419	dREQ;
		1420
		1421	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1422	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1423	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1424
		1425	REQ_SEND;
		1426	}
		1427
		1428	void
		1429	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1430	PPCODE:
		1431	{
		1432	dREQ;
		1433
		1434	req->type = EIO_READDIR;
		1435	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1436
		1437	if (flags & EIO_READDIR_DENTS)
		1438	req->int1 |= EIO_READDIR_CUSTOM2;
		1439
		1440	req_set_path1 (req, pathname);
		1441
		1442	REQ_SEND;
		1443	}
		1444
		1445	void
		1446	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1447	PPCODE:
		1448	{
		1449	dREQ;
		1450
		1451	req->type = EIO_MKDIR;
		1452	req->int2 = mode;
		1453	req_set_path1 (req, pathname);
		1454
		1455	REQ_SEND;
		1456	}
		1457
		1458	void
1292	aio_unlink (pathname,callback=&PL_sv_undef)	1459	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	1460	ALIAS:
1296	aio_unlink = REQ_UNLINK	1461	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	1462	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	1463	aio_readdir = EIO_READDIR
1299	PPCODE:	1464	PPCODE:
1300	{	1465	{
1301	dREQ;	1466	dREQ;
1302		1467
1303	req->type = ix;	1468	req->type = ix;
1304	req->data = newSVsv (pathname);	1469	req_set_path1 (req, pathname);
1305	req->dataptr = SvPVbyte_nolen (req->data);	1470
1306
1307	REQ_SEND;	1471	REQ_SEND;
1308	}	1472	}
1309		1473
1310	void	1474	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1475	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:	1476	ALIAS:
1316	aio_link = REQ_LINK	1477	aio_link = EIO_LINK
1317	aio_symlink = REQ_SYMLINK	1478	aio_symlink = EIO_SYMLINK
1318	aio_rename = REQ_RENAME	1479	aio_rename = EIO_RENAME
1319	PPCODE:	1480	PPCODE:
1320	{	1481	{
		1482	eio_wd wd2 = 0;
1321	dREQ;	1483	dREQ;
1322		1484
1323	req->type = ix;	1485	req->type = ix;
1324	req->fh = newSVsv (oldpath);	1486	req_set_path1 (req, oldpath);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	1487	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1326	req->data = newSVsv (newpath);	1488	req->int3 = (long)wd2;
1327	req->dataptr = SvPVbyte_nolen (req->data);
1328		1489
1329	REQ_SEND;	1490	REQ_SEND;
1330	}	1491	}
1331		1492
1332	void	1493	void
1333	aio_busy (delay,callback=&PL_sv_undef)	1494	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	1495	PPCODE:
1337	{	1496	{
1338	dREQ;	1497	dREQ;
1339		1498
1340	req->type = REQ_BUSY;	1499	req->type = EIO_MKNOD;
1341	req->fd = delay < 0. ? 0 : delay;	1500	req->int2 = (mode_t)mode;
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1501	req->offs = dev;
1343		1502	req_set_path1 (req, pathname);
		1503
1344	REQ_SEND;	1504	REQ_SEND;
1345	}	1505	}
1346		1506
1347	void	1507	void
1348	aio_group (callback=&PL_sv_undef)	1508	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback = &PL_sv_undef)
1349	SV * callback	1509	ALIAS:
1350	PROTOTYPE: ;$	1510	aio_mtouch = EIO_MTOUCH
		1511	aio_msync = EIO_MSYNC
1351	PPCODE:	1512	PPCODE:
1352	{	1513	{
		1514	STRLEN svlen;
		1515	char *svptr = SvPVbyte (data, svlen);
		1516	UV len = SvUV (length);
		1517
		1518	if (offset < 0)
		1519	offset += svlen;
		1520
		1521	if (offset < 0 || offset > svlen)
		1522	croak ("offset outside of scalar");
		1523
		1524	if (!SvOK (length) || len + offset > svlen)
		1525	len = svlen - offset;
		1526
		1527	{
		1528	dREQ;
		1529
		1530	req->type = ix;
		1531	req->sv2 = SvREFCNT_inc (data);
		1532	req->ptr2 = (char *)svptr + offset;
		1533	req->size = len;
		1534	req->int1 = flags;
		1535
		1536	REQ_SEND;
		1537	}
		1538	}
		1539
		1540	void
		1541	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1542	PPCODE:
		1543	{
		1544	STRLEN svlen;
		1545	char *svptr = SvPVbyte (data, svlen);
		1546	UV len = SvUV (length);
		1547
		1548	if (offset < 0)
		1549	offset += svlen;
		1550
		1551	if (offset < 0 || offset > svlen)
		1552	croak ("offset outside of scalar");
		1553
		1554	if (!SvOK (length) || len + offset > svlen)
		1555	len = svlen - offset;
		1556
		1557	{
		1558	dREQ;
		1559
		1560	req->type = EIO_MLOCK;
		1561	req->sv2 = SvREFCNT_inc (data);
		1562	req->ptr2 = (char *)svptr + offset;
		1563	req->size = len;
		1564
		1565	REQ_SEND;
		1566	}
		1567	}
		1568
		1569	void
		1570	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1571	PPCODE:
		1572	{
		1573	dREQ;
		1574
		1575	req->type = EIO_MLOCKALL;
		1576	req->int1 = flags;
		1577
		1578	REQ_SEND;
		1579	}
		1580
		1581	void
		1582	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1583	PPCODE:
		1584	{
		1585	int fd = s_fileno_croak (fh, 0);
1353	dREQ;	1586	dREQ;
1354		1587
1355	req->type = REQ_GROUP;	1588	req->type = EIO_CUSTOM;
1356	req_send (req);	1589	req->sv1 = newSVsv (fh);
		1590	req->int1 = fd;
1357		1591
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1592	req->feed = fiemap;
1359	}	1593	#if HAVE_FIEMAP
		1594	/* keep our fingers crossed that the next two types are 64 bit */
		1595	req->offs = start;
		1596	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1597	req->int2 = flags;
		1598	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1599	#endif
1360		1600
		1601	REQ_SEND;
		1602	}
		1603
1361	void	1604	void
1362	aio_nop (callback=&PL_sv_undef)	1605	aio_busy (double delay, SV *callback = &PL_sv_undef)
1363	SV * callback
1364	PPCODE:	1606	PPCODE:
1365	{	1607	{
1366	dREQ;	1608	dREQ;
1367		1609
1368	req->type = REQ_NOP;	1610	req->type = EIO_BUSY;
		1611	req->nv1 = delay < 0. ? 0. : delay;
1369		1612
1370	REQ_SEND;	1613	REQ_SEND;
1371	}	1614	}
1372		1615
1373	void	1616	void
1374	aioreq_pri (int pri = DEFAULT_PRI)	1617	aio_group (SV *callback = &PL_sv_undef)
1375	CODE:	1618	PPCODE:
		1619	{
		1620	dREQ;
		1621
		1622	req->type = EIO_GROUP;
		1623
		1624	PUTBACK;
		1625	req_submit (req);
		1626	SPAGAIN;
		1627
		1628	XPUSHs (req_sv (req, aio_grp_stash));
		1629	}
		1630
		1631	void
		1632	aio_nop (SV *callback = &PL_sv_undef)
		1633	ALIAS:
		1634	aio_nop = EIO_NOP
		1635	aio_sync = EIO_SYNC
		1636	PPCODE:
		1637	{
		1638	dREQ;
		1639
		1640	req->type = ix;
		1641
		1642	REQ_SEND;
		1643	}
		1644
		1645	int
		1646	aioreq_pri (int pri = NO_INIT)
		1647	CODE:
		1648	RETVAL = next_pri;
		1649	if (items > 0)
		1650	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	1651	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	1652	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	1653	next_pri = pri;
		1654	}
		1655	OUTPUT:
		1656	RETVAL
1379		1657
1380	void	1658	void
1381	aioreq_nice (int nice = 0)	1659	aioreq_nice (int nice = 0)
1382	CODE:	1660	CODE:
1383	nice = next_pri - nice;	1661	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	1662	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	1663	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	1664	next_pri = nice;
1387		1665
1388	void	1666	void
1389	flush ()	1667	flush ()
1390	PROTOTYPE:
1391	CODE:	1668	CODE:
1392	while (nreqs)	1669	while (eio_nreqs ())
1393	{	1670	{
1394	poll_wait ();	1671	poll_wait ();
1395	poll_cb ();	1672	poll_cb ();
1396	}	1673	}
1397		1674
1398	void	1675	int
1399	poll()	1676	poll ()
1400	PROTOTYPE:
1401	CODE:	1677	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	1678	poll_wait ();
1405	poll_cb ();	1679	RETVAL = poll_cb ();
1406	}
1407
1408	int
1409	poll_fileno()
1410	PROTOTYPE:
1411	CODE:
1412	RETVAL = respipe [0];
1413	OUTPUT:	1680	OUTPUT:
1414	RETVAL	1681	RETVAL
1415		1682
1416	int	1683	int
		1684	poll_fileno ()
		1685	CODE:
		1686	RETVAL = s_epipe_fd (&respipe);
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	int
1417	poll_cb(...)	1691	poll_cb (...)
1418	PROTOTYPE:	1692	PROTOTYPE:
1419	CODE:	1693	CODE:
1420	RETVAL = poll_cb ();	1694	RETVAL = poll_cb ();
1421	OUTPUT:	1695	OUTPUT:
1422	RETVAL	1696	RETVAL
1423		1697
1424	void	1698	void
1425	poll_wait()	1699	poll_wait ()
1426	PROTOTYPE:
1427	CODE:	1700	CODE:
1428	if (nreqs)
1429	poll_wait ();	1701	poll_wait ();
1430		1702
1431	int	1703	int
1432	nreqs()	1704	nreqs ()
1433	PROTOTYPE:
1434	CODE:	1705	CODE:
1435	RETVAL = nreqs;	1706	RETVAL = eio_nreqs ();
1436	OUTPUT:	1707	OUTPUT:
1437	RETVAL	1708	RETVAL
1438		1709
		1710	int
		1711	nready ()
		1712	CODE:
		1713	RETVAL = eio_nready ();
		1714	OUTPUT:
		1715	RETVAL
		1716
		1717	int
		1718	npending ()
		1719	CODE:
		1720	RETVAL = eio_npending ();
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	nthreads ()
		1726	CODE:
		1727	RETVAL = eio_nthreads ();
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	int
		1732	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1733	CODE:
		1734	RETVAL = posix_fadvise (fh, offset, length, advice);
		1735	OUTPUT:
		1736	RETVAL
		1737
		1738	IV
		1739	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1740	CODE:
		1741	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1747	PPCODE:
		1748	sv_unmagic (scalar, MMAP_MAGIC);
		1749	{
		1750	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1751	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1752	if (addr == (void *)-1)
		1753	XSRETURN_NO;
		1754
		1755	sv_force_normal (scalar);
		1756
		1757	/* we store the length in mg_obj, as namlen is I32 :/ */
		1758	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1759	->mg_obj = (SV *)length;
		1760
		1761	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1762
		1763	if (!(prot & PROT_WRITE))
		1764	SvREADONLY_on (scalar);
		1765
		1766	if (SvLEN (scalar))
		1767	Safefree (SvPVX (scalar));
		1768
		1769	SvPVX (scalar) = (char *)addr;
		1770	SvCUR_set (scalar, length);
		1771	SvLEN_set (scalar, 0);
		1772	SvPOK_only (scalar);
		1773
		1774	XSRETURN_YES;
		1775	}
		1776
		1777	void
		1778	munmap (SV *scalar)
		1779	CODE:
		1780	sv_unmagic (scalar, MMAP_MAGIC);
		1781
		1782	int
		1783	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1784	ALIAS:
		1785	mprotect = 1
		1786	CODE:
		1787	{
		1788	STRLEN svlen;
		1789	void *addr = SvPVbyte (scalar, svlen);
		1790	STRLEN len = SvUV (length);
		1791
		1792	if (offset < 0)
		1793	offset += svlen;
		1794
		1795	if (offset < 0 || offset > svlen)
		1796	croak ("offset outside of scalar");
		1797
		1798	if (!SvOK (length) || len + offset > svlen)
		1799	len = svlen - offset;
		1800
		1801	addr = (void *)(((intptr_t)addr) + offset);
		1802	eio_page_align (&addr, &len);
		1803
		1804	switch (ix)
		1805	{
		1806	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1807	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1808	}
		1809	}
		1810	OUTPUT:
		1811	RETVAL
		1812
		1813	int
		1814	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1815	CODE:
		1816	{
		1817	STRLEN svlen;
		1818	void *addr = SvPVbyte (scalar, svlen);
		1819	size_t len = SvUV (length);
		1820
		1821	if (offset < 0)
		1822	offset += svlen;
		1823
		1824	if (offset < 0 || offset > svlen)
		1825	croak ("offset outside of scalar");
		1826
		1827	if (!SvOK (length) || len + offset > svlen)
		1828	len = svlen - offset;
		1829
		1830	addr = (void *)(((intptr_t)addr) + offset);
		1831	eio_page_align (&addr, &len);
		1832	#if _POSIX_MEMLOCK_RANGE
		1833	RETVAL = munlock (addr, len);
		1834	#else
		1835	RETVAL = EIO_ENOSYS ();
		1836	#endif
		1837	}
		1838	OUTPUT:
		1839	RETVAL
		1840
		1841	int
		1842	munlockall ()
		1843	CODE:
		1844	#if _POSIX_MEMLOCK
		1845	munlockall ();
		1846	#else
		1847	RETVAL = EIO_ENOSYS ();
		1848	#endif
		1849	OUTPUT:
		1850	RETVAL
		1851
		1852	int
		1853	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1854	CODE:
		1855	{
		1856	#if HAVE_LINUX_SPLICE
		1857	loff_t off_in_, off_out_;
		1858	RETVAL = splice (
		1859	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1860	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1861	length, flags
		1862	);
		1863	#else
		1864	RETVAL = EIO_ENOSYS ();
		1865	#endif
		1866	}
		1867	OUTPUT:
		1868	RETVAL
		1869
		1870	int
		1871	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1872	CODE:
		1873	#if HAVE_LINUX_SPLICE
		1874	RETVAL = tee (rfh, wfh, length, flags);
		1875	#else
		1876	RETVAL = EIO_ENOSYS ();
		1877	#endif
		1878	OUTPUT:
		1879	RETVAL
		1880
		1881	int
		1882	pipesize (aio_rfd rfh, int new_size = -1)
		1883	PROTOTYPE: $;$
		1884	CODE:
		1885	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1886	if (new_size >= 0)
		1887	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1888	else
		1889	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1890	#else
		1891	errno = ENOSYS;
		1892	RETVAL = -1;
		1893	#endif
		1894	OUTPUT:
		1895	RETVAL
		1896
		1897	void
		1898	pipe2 (int flags = 0)
		1899	PROTOTYPE: ;$
		1900	PPCODE:
		1901	{
		1902	int fd[2];
		1903	int res;
		1904
		1905	if (flags)
		1906	#if HAVE_PIPE2
		1907	res = pipe2 (fd, flags);
		1908	#else
		1909	res = (errno = ENOSYS, -1);
		1910	#endif
		1911	else
		1912	res = pipe (fd);
		1913
		1914	if (!res)
		1915	{
		1916	EXTEND (SP, 2);
		1917	PUSHs (newmortalFH (fd[0], O_RDONLY));
		1918	PUSHs (newmortalFH (fd[1], O_WRONLY));
		1919	}
		1920	}
		1921
		1922	void _on_next_submit (SV *cb)
		1923	CODE:
		1924	SvREFCNT_dec (on_next_submit);
		1925	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1926
1439	PROTOTYPES: DISABLE	1927	PROTOTYPES: DISABLE
		1928
		1929	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1930
		1931	BOOT:
		1932	{
		1933	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1934	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1935	}
		1936
		1937	void
		1938	DESTROY (SV *self)
		1939	CODE:
		1940	{
		1941	aio_wd wd = SvAIO_WD (self);
		1942	#if HAVE_AT
		1943	{
		1944	SV *callback = &PL_sv_undef;
		1945	dREQ; /* clobbers next_pri :/ */
		1946	next_pri = req->pri; /* restore next_pri */
		1947	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1948	req->type = EIO_WD_CLOSE;
		1949	req->wd = wd;
		1950	REQ_SEND;
		1951	}
		1952	#else
		1953	eio_wd_close_sync (wd);
		1954	#endif
		1955	}
1440		1956
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1957	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1958
1443	void	1959	void
1444	cancel (aio_req_ornot req)	1960	cancel (aio_req_ornot req)
1445	CODE:	1961	CODE:
1446	req_cancel (req);	1962	eio_cancel (req);
1447		1963
1448	void	1964	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1965	cb (aio_req_ornot req, SV *callback = NO_INIT)
1450	CODE:	1966	PPCODE:
		1967	{
		1968	if (GIMME_V != G_VOID)
		1969	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1970
		1971	if (items > 1)
		1972	{
		1973	SV *cb_cv = get_cb (callback);
		1974
1451	SvREFCNT_dec (req->callback);	1975	SvREFCNT_dec (req->callback);
1452	req->callback = newSVsv (callback);	1976	req->callback = SvREFCNT_inc (cb_cv);
		1977	}
		1978	}
1453		1979
1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1980	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455		1981
1456	void	1982	void
1457	add (aio_req grp, ...)	1983	add (aio_req grp, ...)
1458	PPCODE:	1984	PPCODE:
1459	{	1985	{
1460	int i;	1986	int i;
1461	aio_req req;
1462		1987
1463	if (grp->fd == 2)	1988	if (grp->int1 == 2)
1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1989	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1465		1990
1466	for (i = 1; i < items; ++i )	1991	for (i = 1; i < items; ++i )
1467	{	1992	{
		1993	aio_req req;
		1994
1468	if (GIMME_V != G_VOID)	1995	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1996	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1997
1471	req = SvAIO_REQ (ST (i));	1998	req = SvAIO_REQ (ST (i));
1472		1999
1473	if (req)	2000	if (req)
1474	{	2001	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	2002	}
1487	}	2003	}
1488		2004
1489	void	2005	void
1490	cancel_subs (aio_req_ornot req)	2006	cancel_subs (aio_req_ornot req)
…		…
1494	void	2010	void
1495	result (aio_req grp, ...)	2011	result (aio_req grp, ...)
1496	CODE:	2012	CODE:
1497	{	2013	{
1498	int i;	2014	int i;
		2015	AV *av;
		2016
		2017	grp->errorno = errno;
		2018
1499	AV *av = newAV ();	2019	av = newAV ();
		2020	av_extend (av, items - 1);
1500		2021
1501	for (i = 1; i < items; ++i )	2022	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	2023	av_push (av, newSVsv (ST (i)));
1503		2024
1504	SvREFCNT_dec (grp->data);	2025	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	2026	grp->sv1 = (SV *)av;
1506	}	2027	}
		2028
		2029	void
		2030	errno (aio_req grp, int errorno = errno)
		2031	CODE:
		2032	grp->errorno = errorno;
1507		2033
1508	void	2034	void
1509	limit (aio_req grp, int limit)	2035	limit (aio_req grp, int limit)
1510	CODE:	2036	CODE:
1511	grp->fd2 = limit;	2037	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		2038
1514	void	2039	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	2040	feed (aio_req grp, SV *callback = &PL_sv_undef)
1516	CODE:	2041	CODE:
1517	{	2042	{
1518	SvREFCNT_dec (grp->fh2);	2043	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	2044	grp->sv2 = newSVsv (callback);
		2045	grp->feed = aio_grp_feed;
1520		2046
1521	if (grp->fd2 <= 0)	2047	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	2048	grp->int2 = 2;
1523		2049
1524	aio_grp_feed (grp);	2050	eio_grp_limit (grp, grp->int2);
1525	}	2051	}
1526		2052

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