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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 UTC vs.
Revision 1.169 by root, Wed Aug 4 16:06:54 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
16	#include <limits.h>	17	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	18	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	19	#include <sched.h>
21		20
22	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
23	# if __linux
24	# include <sys/sendfile.h>	22	# include <sys/mman.h>
25	# elif __freebsd	23	#endif
26	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
27	# include <sys/uio.h>	68	# include <sys/time.h>
28	# elif __hpux
29	# include <sys/socket.h>
30	# elif __solaris /* not yet */
31	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef POSIX_MADV_NORMAL
		146	# define POSIX_MADV_NORMAL 0
		147	# define NO_MADVISE 1
		148	#endif
		149	#ifndef POSIX_MADV_SEQUENTIAL
		150	# define POSIX_MADV_SEQUENTIAL 0
		151	#endif
		152	#ifndef POSIX_MADV_RANDOM
		153	# define POSIX_MADV_RANDOM 0
		154	#endif
		155	#ifndef POSIX_MADV_WILLNEED
		156	# define POSIX_MADV_WILLNEED 0
		157	#endif
		158	#ifndef POSIX_MADV_DONTNEED
		159	# define POSIX_MADV_DONTNEED 0
		160	#endif
		161
		162	#ifndef ST_NODEV
		163	# define ST_NODEV 0
		164	#endif
		165	#ifndef ST_NOEXEC
		166	# define ST_NOEXEC 0
		167	#endif
		168	#ifndef ST_SYNCHRONOUS
		169	# define ST_SYNCHRONOUS 0
		170	#endif
		171	#ifndef ST_MANDLOCK
		172	# define ST_MANDLOCK 0
		173	#endif
		174	#ifndef ST_WRITE
		175	# define ST_WRITE 0
		176	#endif
		177	#ifndef ST_APPEND
		178	# define ST_APPEND 0
		179	#endif
		180	#ifndef ST_IMMUTABLE
		181	# define ST_IMMUTABLE 0
		182	#endif
		183	#ifndef ST_NOATIME
		184	# define ST_NOATIME 0
		185	#endif
		186	#ifndef ST_NODIRATIME
		187	# define ST_NODIRATIME 0
		188	#endif
		189	#ifndef ST_RELATIME
		190	# define ST_RELATIME 0
		191	#endif
		192
		193	#ifndef MCL_CURRENT
		194	# define MCL_CURRENT 0
		195	#endif
		196	#ifndef MCL_FUTURE
		197	# define MCL_FUTURE 0
		198	#endif
		199
		200	#ifndef MAP_ANONYMOUS
		201	# ifdef MAP_ANON
		202	# define MAP_ANONYMOUS MAP_ANON
32	# else	203	# else
33	# error sendfile support requested but not available	204	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	205	# endif
35	#endif	206	#endif
36		207	#ifndef MAP_HUGETLB
37	/* used for struct dirent, AIX doesn't provide it */	208	# define MAP_HUGETLB 0
38	#ifndef NAME_MAX
39	# define NAME_MAX 4096
40	#endif	209	#endif
41		210	#ifndef MAP_LOCKED
42	#if __ia64	211	# define MAP_LOCKED 0
43	# define STACKSIZE 65536
44	#else
45	# define STACKSIZE 8192
46	#endif	212	#endif
		213	#ifndef MAP_NORESERVE
		214	# define MAP_NORESERVE 0
		215	#endif
		216	#ifndef MAP_POPULATE
		217	# define MAP_POPULATE 0
		218	#endif
		219	#ifndef MAP_NONBLOCK
		220	# define MAP_NONBLOCK 0
		221	#endif
		222
		223	#ifndef PAGESIZE
		224	# define PAGESIZE sysconf (_SC_PAGESIZE)
		225	#endif
		226
		227	static int req_invoke (eio_req *req);
		228	#define EIO_FINISH(req) req_invoke (req)
		229	static void req_destroy (eio_req *grp);
		230	#define EIO_DESTROY(req) req_destroy (req)
47		231
48	enum {	232	enum {
49	REQ_QUIT,	233	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};	234	};
59		235
60	typedef struct aio_cb {	236	#include "libeio/eio.c"
61	struct aio_cb *volatile next;
62		237
63	int type;
64
65	/* should receive a cleanup, with unions */
66	int fd, fd2;
67	off_t offset;
68	size_t length;
69	ssize_t result;
70	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76
77	Stat_t *statdata;
78	} aio_cb;
79
80	typedef aio_cb *aio_req;	238	typedef eio_req *aio_req;
		239	typedef eio_req *aio_req_ornot;
81		240
82	static int started, wanted;	241	static SV *on_next_submit;
83	static volatile int nreqs;	242	static int next_pri = EIO_PRI_DEFAULT;
84	static int max_outstanding = 1<<30;	243	static int max_outstanding;
85	static int respipe [2];
86		244
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	245	static s_epipe respipe;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		246
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	247	static void req_destroy (aio_req req);
92	static volatile aio_req ress, rese; /* queue start, queue end */
93
94	static void free_req (aio_req req)	248	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		249
		250	static void want_poll (void)
		251	{
		252	/* write a dummy byte to the pipe so fh becomes ready */
		253	s_epipe_signal (&respipe);
		254	}
		255
		256	static void done_poll (void)
		257	{
		258	/* read any signals sent by the worker threads */
		259	s_epipe_drain (&respipe);
		260	}
		261
		262	/* must be called at most once */
		263	static SV *req_sv (aio_req req, HV *stash)
		264	{
99	if (req->fh)	265	if (!req->self)
100	SvREFCNT_dec (req->fh);
101
102	if (req->fh2)
103	SvREFCNT_dec (req->fh2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113
114	Safefree (req);
115	}
116
117	static void
118	poll_wait ()
119	{
120	if (nreqs && !ress)
121	{	266	{
122	fd_set rfd;	267	req->self = (SV *)newHV ();
123	FD_ZERO(&rfd);	268	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
124	FD_SET(respipe [0], &rfd);
125
126	select (respipe [0] + 1, &rfd, 0, 0, 0);
127	}	269	}
128	}
129		270
130	static int	271	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
131	poll_cb ()	272	}
132	{
133	dSP;
134	int count = 0;
135	int do_croak = 0;
136	aio_req req;
137		273
138	for (;;)	274	static aio_req SvAIO_REQ (SV *sv)
		275	{
		276	MAGIC *mg;
		277
		278	if (!SvROK (sv)
		279	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		280	&& SvSTASH (SvRV (sv)) != aio_req_stash
		281	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		282	croak ("object of class IO::AIO::REQ expected");
		283
		284	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		285
		286	return mg ? (aio_req)mg->mg_ptr : 0;
		287	}
		288
		289	static void aio_grp_feed (aio_req grp)
		290	{
		291	if (grp->sv2 && SvOK (grp->sv2))
139	{	292	{
140	pthread_mutex_lock (&reslock);	293	dSP;
141	req = ress;
142		294
143	if (req)	295	ENTER;
		296	SAVETMPS;
		297	PUSHMARK (SP);
		298	XPUSHs (req_sv (grp, aio_grp_stash));
		299	PUTBACK;
		300	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		301	SPAGAIN;
		302	FREETMPS;
		303	LEAVE;
		304	}
		305	}
		306
		307	static void req_submit (eio_req *req)
		308	{
		309	eio_submit (req);
		310
		311	if (expect_false (on_next_submit))
		312	{
		313	dSP;
		314	SV *cb = sv_2mortal (on_next_submit);
		315
		316	on_next_submit = 0;
		317
		318	PUSHMARK (SP);
		319	PUTBACK;
		320	call_sv (cb, G_DISCARD | G_EVAL);
		321	}
		322	}
		323
		324	static int req_invoke (eio_req *req)
		325	{
		326	if (req->flags & FLAG_SV2_RO_OFF)
		327	SvREADONLY_off (req->sv2);
		328
		329	if (!EIO_CANCELLED (req) && req->callback)
		330	{
		331	dSP;
		332	static SV *sv_result_cache; /* caches the result integer SV */
		333	SV *sv_result;
		334
		335	ENTER;
		336	SAVETMPS;
		337	PUSHMARK (SP);
		338	EXTEND (SP, 1);
		339
		340	/* do not recreate the result IV from scratch each time */
		341	if (expect_true (sv_result_cache))
144	{	342	{
145	ress = req->next;	343	sv_result = sv_result_cache; sv_result_cache = 0;
146		344	SvIV_set (sv_result, req->result);
147	if (!ress)
148	{
149	/* read any signals sent by the worker threads */
150	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)
152	;
153
154	rese = 0;
155	}
156	}
157
158	pthread_mutex_unlock (&reslock);
159
160	if (!req)
161	break;
162
163	nreqs--;
164
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
181	PL_laststatval = req->result;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}
211	else
212	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}
229	}
230
231	if (SvOK (req->callback))
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}
249
250	free_req (req);
251	}
252
253	return count;
254	}
255
256	static void *aio_proc(void *arg);
257
258	static void
259	start_thread (void)
260	{
261	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}
277
278	static void
279	send_req (aio_req req)
280	{
281	while (started < wanted && nreqs >= started)
282	start_thread ();
283
284	nreqs++;
285
286	pthread_mutex_lock (&reqlock);
287
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}
312
313	static void
314	end_thread (void)
315	{
316	aio_req req;
317	Newz (0, req, 1, aio_cb);
318	req->type = REQ_QUIT;
319
320	send_req (req);
321	}
322
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}
348
349	static void create_pipe ()
350	{
351	if (pipe (respipe))
352	croak ("unable to initialize result pipe");
353
354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
355	croak ("cannot set result pipe to nonblocking mode");
356
357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
358	croak ("cannot set result pipe to nonblocking mode");
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static ssize_t
416	readahead (int fd, off_t offset, size_t count)
417	{
418	char readahead_buf[4096];
419
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r
435
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{
441	struct dirent *e;
442	int errorno;
443
444	pthread_mutex_lock (&readdirlock);
445
446	e = readdir (dirp);
447	errorno = errno;
448
449	if (e)
450	{
451	*res = ent;
452	strcpy (ent->d_name, e->d_name);
453	}
454	else
455	*res = 0;
456
457	pthread_mutex_unlock (&readdirlock);
458
459	errno = errorno;
460	return e ? 0 : -1;
461	}
462	#endif
463
464	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
467	{
468	ssize_t res;
469
470	if (!count)
471	return 0;
472
473	#if HAVE_SENDFILE
474	# if __linux
475	res = sendfile (ofd, ifd, &offset, count);
476
477	# elif __freebsd
478	/*
479	* Of course, the freebsd sendfile is a dire hack with no thoughts
480	* wasted on making it similar to other I/O functions.
481	*/
482	{
483	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485
486	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
488	res = sbytes;
489	}
490
491	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);
493
494	# elif __solaris
495	{
496	struct sendfilevec vec;
497	size_t sbytes;
498
499	vec.sfv_fd = ifd;
500	vec.sfv_flag = 0;
501	vec.sfv_off = offset;
502	vec.sfv_len = count;
503
504	res = sendfilev (ofd, &vec, 1, &sbytes);
505
506	if (res < 0 && sbytes)
507	res = sbytes;
508	}
509
510	# endif
511	#else
512	res = -1;
513	errno = ENOSYS;
514	#endif
515
516	if (res < 0
517	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
518	#if __solaris
519	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
520	#endif
521	)
522	)
523	{
524	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];
526	res = 0;
527
528	while (count)
529	{
530	ssize_t cnt;
531
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534	if (cnt <= 0)
535	{
536	if (cnt && !res) res = -1;
537	break;
538	}
539
540	cnt = write (ofd, buf, cnt);
541
542	if (cnt <= 0)
543	{
544	if (cnt && !res) res = -1;
545	break;
546	}
547
548	offset += cnt;
549	res += cnt;
550	count -= cnt;
551	}
552	}
553
554	return res;
555	}
556
557	/* read a full directory */
558	static int
559	scandir_ (const char *path, void **namesp)
560	{
561	DIR *dirp = opendir (path);
562	union
563	{
564	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;
567	struct dirent *entp;
568	char *name, *names;
569	int memlen = 4096;
570	int memofs = 0;
571	int res = 0;
572	int errorno;
573
574	if (!dirp)
575	return -1;
576
577	names = malloc (memlen);
578
579	for (;;)
580	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);
582
583	if (!entp)
584	break;
585
586	name = entp->d_name;
587
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{
590	int len = strlen (name) + 1;
591
592	res++;
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632
633	for (;;)
634	{
635	req = reqs;
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642
643	if (req)
644	break;
645
646	pthread_cond_wait (&reqwait, &reqlock);
647	}
648
649	pthread_mutex_unlock (&reqlock);
650
651	errno = 0; /* strictly unnecessary */
652
653	type = req->type;
654
655	switch (type)
656	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
662
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
678
679	case REQ_QUIT:
680	break;
681
682	default:
683	req->result = ENOSYS;
684	break;
685	}
686
687	req->errorno = errno;
688
689	pthread_mutex_lock (&reslock);
690
691	req->next = 0;
692
693	if (rese)
694	{
695	rese->next = req;
696	rese = req;
697	}	345	}
698	else	346	else
699	{	347	{
700	rese = ress = req;	348	sv_result = newSViv (req->result);
701		349	SvREADONLY_on (sv_result);
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}	350	}
705		351
706	pthread_mutex_unlock (&reslock);	352	switch (req->type)
		353	{
		354	case EIO_READDIR:
		355	{
		356	SV *rv = &PL_sv_undef;
		357
		358	if (req->result >= 0)
		359	{
		360	int i;
		361	char *names = (char *)req->ptr2;
		362	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		363	AV *av = newAV ();
		364
		365	av_extend (av, req->result - 1);
		366
		367	for (i = 0; i < req->result; ++i)
		368	{
		369	if (req->int1 & EIO_READDIR_DENTS)
		370	{
		371	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		372
		373	if (req->int1 & EIO_READDIR_CUSTOM2)
		374	{
		375	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		376	AV *avent = newAV ();
		377
		378	av_extend (avent, 2);
		379
		380	if (!sv_type [ent->type])
		381	{
		382	sv_type [ent->type] = newSViv (ent->type);
		383	SvREADONLY_on (sv_type [ent->type]);
		384	}
		385
		386	av_store (avent, 0, namesv);
		387	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		388	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		389
		390	av_store (av, i, newRV_noinc ((SV *)avent));
		391	}
		392	else
		393	av_store (av, i, namesv);
		394
		395	++ent;
		396	}
		397	else
		398	{
		399	SV *name = newSVpv (names, 0);
		400	av_store (av, i, name);
		401	names += SvCUR (name) + 1;
		402	}
		403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
		406	}
		407
		408	PUSHs (rv);
		409
		410	if (req->int1 & EIO_READDIR_CUSTOM1)
		411	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		412	}
		413	break;
		414
		415	case EIO_OPEN:
		416	{
		417	/* convert fd to fh */
		418	SV *fh = &PL_sv_undef;
		419
		420	if (req->result >= 0)
		421	{
		422	GV *gv = (GV *)sv_newmortal ();
		423	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		424	char sym [64];
		425	int symlen;
		426
		427	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		428	gv_init (gv, aio_stash, sym, symlen, 0);
		429
		430	symlen = snprintf (
		431	sym,
		432	sizeof (sym),
		433	"%s&=%d",
		434	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		435	(int)req->result
		436	);
		437
		438	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		439	fh = (SV *)gv;
		440	}
		441
		442	PUSHs (fh);
		443	}
		444	break;
		445
		446	case EIO_STATVFS:
		447	case EIO_FSTATVFS:
		448	{
		449	SV *rv = &PL_sv_undef;
		450
		451	if (req->result >= 0)
		452	{
		453	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		454	HV *hv = newHV ();
		455
		456	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		457
		458	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		459	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		460	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		461	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		462	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		463	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		464	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		465	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		466	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		467	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		468	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		469	}
		470
		471	PUSHs (rv);
		472	}
		473
		474	break;
		475
		476	case EIO_GROUP:
		477	req->int1 = 2; /* mark group as finished */
		478
		479	if (req->sv1)
		480	{
		481	int i;
		482	AV *av = (AV *)req->sv1;
		483
		484	EXTEND (SP, AvFILL (av) + 1);
		485	for (i = 0; i <= AvFILL (av); ++i)
		486	PUSHs (*av_fetch (av, i, 0));
		487	}
		488	break;
		489
		490	case EIO_NOP:
		491	case EIO_BUSY:
		492	break;
		493
		494	case EIO_READLINK:
		495	if (req->result > 0)
		496	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		497	break;
		498
		499	case EIO_STAT:
		500	case EIO_LSTAT:
		501	case EIO_FSTAT:
		502	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		503	PL_laststatval = req->result;
		504	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		505	PUSHs (sv_result);
		506	break;
		507
		508	case EIO_READ:
		509	{
		510	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		511	*SvEND (req->sv2) = 0;
		512	SvPOK_only (req->sv2);
		513	SvSETMAGIC (req->sv2);
		514	PUSHs (sv_result);
		515	}
		516	break;
		517
		518	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		519	if (req->result > 0)
		520	SvIV_set (sv_result, 0);
		521	/* FALLTHROUGH */
		522
		523	default:
		524	PUSHs (sv_result);
		525	break;
		526	}
		527
		528	errno = req->errorno;
		529
		530	PUTBACK;
		531	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		532	SPAGAIN;
		533
		534	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		535	SvREFCNT_dec (sv_result);
		536	else
		537	sv_result_cache = sv_result;
		538
		539	FREETMPS;
		540	LEAVE;
		541
		542	PUTBACK;
707	}	543	}
708	while (type != REQ_QUIT);	544
		545	return !!SvTRUE (ERRSV);
		546	}
		547
		548	static void req_destroy (aio_req req)
		549	{
		550	if (req->self)
		551	{
		552	sv_unmagic (req->self, PERL_MAGIC_ext);
		553	SvREFCNT_dec (req->self);
		554	}
		555
		556	SvREFCNT_dec (req->sv1);
		557	SvREFCNT_dec (req->sv2);
		558	SvREFCNT_dec (req->callback);
		559
		560	Safefree (req);
		561	}
		562
		563	static void req_cancel_subs (aio_req grp)
		564	{
		565	aio_req sub;
		566
		567	if (grp->type != EIO_GROUP)
		568	return;
		569
		570	SvREFCNT_dec (grp->sv2);
		571	grp->sv2 = 0;
		572
		573	eio_grp_cancel (grp);
		574	}
		575
		576	static void
		577	create_respipe (void)
		578	{
		579	if (s_epipe_renew (&respipe))
		580	croak ("IO::AIO: unable to initialize result pipe");
		581	}
		582
		583	static void poll_wait (void)
		584	{
		585	while (eio_nreqs ())
		586	{
		587	int size;
		588
		589	X_LOCK (reslock);
		590	size = res_queue.size;
		591	X_UNLOCK (reslock);
		592
		593	if (size)
		594	return;
		595
		596	etp_maybe_start_thread ();
		597
		598	s_epipe_wait (&respipe);
		599	}
		600	}
		601
		602	static int poll_cb (void)
		603	{
		604	for (;;)
		605	{
		606	int res = eio_poll ();
		607
		608	if (res > 0)
		609	croak (0);
		610
		611	if (!max_outstanding || max_outstanding > eio_nreqs ())
		612	return res;
		613
		614	poll_wait ();
		615	}
		616	}
		617
		618	static void atfork_child (void)
		619	{
		620	create_respipe ();
		621	}
		622
		623	/*****************************************************************************/
		624
		625	#if !_POSIX_MAPPED_FILES
		626	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		627	# define munmap(addr,length) (errno = ENOSYS, -1)
		628	#endif
		629
		630	#define MMAP_MAGIC PERL_MAGIC_ext
		631
		632	static int
		633	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		634	{
		635	int old_errno = errno;
		636	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		637	errno = old_errno;
		638
		639	mg->mg_obj = 0; /* just in case */
		640
		641	SvREADONLY_off (sv);
		642
		643	if (SvPVX (sv) != mg->mg_ptr)
		644	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		645
		646	SvCUR_set (sv, 0);
		647	SvPVX (sv) = 0;
		648	SvOK_off (sv);
709		649
710	return 0;	650	return 0;
711	}	651	}
712		652
		653	static MGVTBL mmap_vtbl = {
		654	0, 0, 0, 0, mmap_free
		655	};
		656
713	/*****************************************************************************/	657	/*****************************************************************************/
714		658
715	static void atfork_prepare (void)	659	static SV *
		660	get_cb (SV *cb_sv)
716	{	661	{
717	pthread_mutex_lock (&reqlock);	662	SvGETMAGIC (cb_sv);
718	pthread_mutex_lock (&reslock);	663	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
719	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);
721	#endif
722	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);
724	#endif
725	}
726
727	static void atfork_parent (void)
728	{
729	#if !HAVE_READDIR_R
730	pthread_mutex_unlock (&readdirlock);
731	#endif
732	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);
734	#endif
735	pthread_mutex_unlock (&reslock);
736	pthread_mutex_unlock (&reqlock);
737	}
738
739	static void atfork_child (void)
740	{
741	aio_req prv;
742
743	started = 0;
744
745	while (reqs)
746	{
747	prv = reqs;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762
763	close (respipe [0]);
764	close (respipe [1]);
765	create_pipe ();
766
767	atfork_parent ();
768	}	664	}
769		665
770	#define dREQ \	666	#define dREQ \
		667	SV *cb_cv; \
771	aio_req req; \	668	aio_req req; \
		669	int req_pri = next_pri; \
		670	next_pri = EIO_PRI_DEFAULT; \
772	\	671	\
773	if (SvOK (callback) && !SvROK (callback)) \	672	cb_cv = get_cb (callback); \
774	croak ("clalback must be undef or of reference type"); \
775	\	673	\
776	Newz (0, req, 1, aio_cb); \	674	Newz (0, req, 1, eio_req); \
777	if (!req) \	675	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	676	croak ("out of memory during eio_req allocation"); \
779	\	677	\
780	req->callback = newSVsv (callback);	678	req->callback = SvREFCNT_inc (cb_cv); \
781		679	req->pri = req_pri
		680
		681	#define REQ_SEND \
		682	PUTBACK; \
		683	req_submit (req); \
		684	SPAGAIN; \
		685	\
		686	if (GIMME_V != G_VOID) \
		687	XPUSHs (req_sv (req, aio_req_stash));
		688
782	MODULE = IO::AIO PACKAGE = IO::AIO	689	MODULE = IO::AIO PACKAGE = IO::AIO
783		690
784	PROTOTYPES: ENABLE	691	PROTOTYPES: ENABLE
785		692
786	BOOT:	693	BOOT:
787	{	694	{
		695	static const struct {
		696	const char *name;
		697	IV iv;
		698	} *civ, const_iv[] = {
		699	# define const_niv(name, value) { # name, (IV) value },
		700	# define const_iv(name) { # name, (IV) name },
		701	# define const_eio(name) { # name, (IV) EIO_ ## name },
		702	const_iv (EXDEV)
		703	const_iv (ENOSYS)
		704	const_iv (O_RDONLY)
		705	const_iv (O_WRONLY)
		706	const_iv (O_RDWR)
		707	const_iv (O_CREAT)
		708	const_iv (O_TRUNC)
		709	const_iv (O_EXCL)
		710	const_iv (O_APPEND)
		711	#ifndef _WIN32
		712	const_iv (S_IFIFO)
		713	#endif
		714	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		715	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		716	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		717	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		718	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		719	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		720
		721	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		722	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		723	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		724	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		725	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		726
		727	const_iv (ST_RDONLY)
		728	const_iv (ST_NOSUID)
		729	const_iv (ST_NODEV)
		730	const_iv (ST_NOEXEC)
		731	const_iv (ST_SYNCHRONOUS)
		732	const_iv (ST_MANDLOCK)
		733	const_iv (ST_WRITE)
		734	const_iv (ST_APPEND)
		735	const_iv (ST_IMMUTABLE)
		736	const_iv (ST_NOATIME)
		737	const_iv (ST_NODIRATIME)
		738	const_iv (ST_RELATIME)
		739
		740	const_iv (PROT_EXEC)
		741	const_iv (PROT_NONE)
		742	const_iv (PROT_READ)
		743	const_iv (PROT_WRITE)
		744
		745	/*const_iv (MAP_FIXED)*/
		746	const_iv (MAP_PRIVATE)
		747	const_iv (MAP_SHARED)
		748	const_iv (MAP_ANONYMOUS)
		749
		750	/* linuxish */
		751	const_iv (MAP_HUGETLB)
		752	const_iv (MAP_LOCKED)
		753	const_iv (MAP_NORESERVE)
		754	const_iv (MAP_POPULATE)
		755	const_iv (MAP_NONBLOCK)
		756
		757	const_iv (MCL_FUTURE)
		758	const_iv (MCL_CURRENT)
		759
		760	const_eio (MS_ASYNC)
		761	const_eio (MS_INVALIDATE)
		762	const_eio (MS_SYNC)
		763
		764	const_eio (MT_MODIFY)
		765
		766	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		767	const_eio (SYNC_FILE_RANGE_WRITE)
		768	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		769
		770	const_eio (READDIR_DENTS)
		771	const_eio (READDIR_DIRS_FIRST)
		772	const_eio (READDIR_STAT_ORDER)
		773	const_eio (READDIR_FOUND_UNKNOWN)
		774
		775	const_eio (DT_UNKNOWN)
		776	const_eio (DT_FIFO)
		777	const_eio (DT_CHR)
		778	const_eio (DT_DIR)
		779	const_eio (DT_BLK)
		780	const_eio (DT_REG)
		781	const_eio (DT_LNK)
		782	const_eio (DT_SOCK)
		783	const_eio (DT_WHT)
		784	};
		785
788	HV *stash = gv_stashpv ("IO::AIO", 1);	786	aio_stash = gv_stashpv ("IO::AIO" , 1);
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	787	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	788	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
792		789
		790	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		791	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		792
		793	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		794
793	create_pipe ();	795	create_respipe ();
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
795	}
796		796
		797	if (eio_init (want_poll, done_poll) < 0)
		798	croak ("IO::AIO: unable to initialise eio library");
		799
		800	/* atfork child called in fifo order, so before eio's handler */
		801	X_THREAD_ATFORK (0, 0, atfork_child);
		802	}
		803
797	void	804	void
798	min_parallel (nthreads)	805	max_poll_reqs (int nreqs)
799	int nthreads
800	PROTOTYPE: $	806	PROTOTYPE: $
		807	CODE:
		808	eio_set_max_poll_reqs (nreqs);
801		809
802	void	810	void
803	max_parallel (nthreads)	811	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	812	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	813	CODE:
812	RETVAL = max_outstanding;	814	eio_set_max_poll_time (nseconds);
		815
		816	void
		817	min_parallel (int nthreads)
		818	PROTOTYPE: $
		819	CODE:
		820	eio_set_min_parallel (nthreads);
		821
		822	void
		823	max_parallel (int nthreads)
		824	PROTOTYPE: $
		825	CODE:
		826	eio_set_max_parallel (nthreads);
		827
		828	void
		829	max_idle (int nthreads)
		830	PROTOTYPE: $
		831	CODE:
		832	eio_set_max_idle (nthreads);
		833
		834	void
		835	max_outstanding (int maxreqs)
		836	PROTOTYPE: $
		837	CODE:
813	max_outstanding = nreqs;	838	max_outstanding = maxreqs;
814		839
815	void	840	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	841	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
817	SV * pathname
818	int flags
819	int mode
820	SV * callback
821	PROTOTYPE: $$$;$	842	PROTOTYPE: $$$;$
822	CODE:	843	PPCODE:
823	{	844	{
824	dREQ;	845	dREQ;
825		846
826	req->type = REQ_OPEN;	847	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	848	req->sv1 = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	849	req->ptr1 = SvPVbyte_nolen (req->sv1);
829	req->fd = flags;	850	req->int1 = flags;
830	req->mode = mode;	851	req->int2 = mode;
831		852
832	send_req (req);	853	REQ_SEND;
833	}	854	}
834		855
835	void	856	void
836	aio_close (fh,callback=&PL_sv_undef)	857	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$	858	PROTOTYPE: $;$
840	ALIAS:	859	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	860	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	861	aio_fdatasync = EIO_FDATASYNC
844	CODE:	862	PPCODE:
845	{	863	{
		864	int fd = s_fileno_croak (fh, 0);
846	dREQ;	865	dREQ;
847		866
848	req->type = ix;	867	req->type = ix;
849	req->fh = newSVsv (fh);	868	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	869	req->int1 = fd;
851		870
852	send_req (req);	871	REQ_SEND (req);
853	}	872	}
854		873
855	void	874	void
		875	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		876	PROTOTYPE: $$$$;$
		877	PPCODE:
		878	{
		879	int fd = s_fileno_croak (fh, 0);
		880	dREQ;
		881
		882	req->type = EIO_SYNC_FILE_RANGE;
		883	req->sv1 = newSVsv (fh);
		884	req->int1 = fd;
		885	req->offs = offset;
		886	req->size = nbytes;
		887	req->int2 = flags;
		888
		889	REQ_SEND (req);
		890	}
		891
		892	void
		893	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		894	PROTOTYPE: $;$
		895	PPCODE:
		896	{
		897	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		898	int fd = s_fileno_croak (fh, 0);
		899	dREQ;
		900
		901	if (close_pipe < 0)
		902	{
		903	int pipefd [2];
		904
		905	if (pipe (pipefd) < 0
		906	|| close (pipefd [1]) < 0
		907	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		908	abort (); /*D*/
		909
		910	close_pipe = pipefd [0];
		911	}
		912
		913	req->type = EIO_DUP2;
		914	req->int1 = close_pipe;
		915	req->sv2 = newSVsv (fh);
		916	req->int2 = fd;
		917
		918	REQ_SEND (req);
		919	}
		920
		921	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	922	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
857	SV * fh
858	UV offset
859	UV length
860	SV * data
861	UV dataoffset
862	SV * callback
863	ALIAS:	923	ALIAS:
864	aio_read = REQ_READ	924	aio_read = EIO_READ
865	aio_write = REQ_WRITE	925	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$	926	PROTOTYPE: $$$$$;$
867	CODE:	927	PPCODE:
868	{	928	{
869	aio_req req;
870	STRLEN svlen;	929	STRLEN svlen;
		930	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	931	char *svptr = SvPVbyte (data, svlen);
872		932	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		933
876	if (dataoffset < 0)	934	if (dataoffset < 0)
877	dataoffset += svlen;	935	dataoffset += svlen;
878		936
879	if (dataoffset < 0 || dataoffset > svlen)	937	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	938	croak ("dataoffset outside of data scalar");
881		939
882	if (ix == REQ_WRITE)	940	if (ix == EIO_WRITE)
883	{	941	{
884	/* write: check length and adjust. */	942	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	943	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	944	len = svlen - dataoffset;
887	}	945	}
888	else	946	else
889	{	947	{
890	/* read: grow scalar as necessary */	948	/* read: check type and grow scalar as necessary */
		949	SvUPGRADE (data, SVt_PV);
891	svptr = SvGROW (data, length + dataoffset);	950	svptr = SvGROW (data, len + dataoffset + 1);
892	}	951	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		952
897	{	953	{
898	dREQ;	954	dREQ;
899		955
900	req->type = ix;	956	req->type = ix;
901	req->fh = newSVsv (fh);	957	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	958	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	959	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	960	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	961	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	962	req->ptr2 = (char *)svptr + dataoffset;
		963	req->stroffset = dataoffset;
908		964
909	if (!SvREADONLY (data))	965	if (!SvREADONLY (data))
910	{	966	{
911	SvREADONLY_on (data);	967	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	968	req->flags |= FLAG_SV2_RO_OFF;
913	}	969	}
914		970
915	send_req (req);	971	REQ_SEND;
916	}	972	}
917	}	973	}
918		974
919	void	975	void
		976	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		977	PROTOTYPE: $$;$
		978	PPCODE:
		979	{
		980	SV *data;
		981	dREQ;
		982
		983	req->type = EIO_READLINK;
		984	req->sv1 = newSVsv (path);
		985	req->ptr1 = SvPVbyte_nolen (req->sv1);
		986
		987	REQ_SEND;
		988	}
		989
		990	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	991	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
921	SV * out_fh
922	SV * in_fh
923	UV in_offset
924	UV length
925	SV * callback
926	PROTOTYPE: $$$$;$	992	PROTOTYPE: $$$$;$
927	CODE:	993	PPCODE:
928	{	994	{
		995	int ifd = s_fileno_croak (in_fh , 0);
		996	int ofd = s_fileno_croak (out_fh, 1);
929	dREQ;	997	dREQ;
930		998
931	req->type = REQ_SENDFILE;	999	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	1000	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1001	req->int1 = ofd;
934	req->fh2 = newSVsv (in_fh);	1002	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1003	req->int2 = ifd;
936	req->offset = in_offset;	1004	req->offs = in_offset;
937	req->length = length;	1005	req->size = length;
938		1006
939	send_req (req);	1007	REQ_SEND;
940	}	1008	}
941		1009
942	void	1010	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1011	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$	1012	PROTOTYPE: $$$;$
949	CODE:	1013	PPCODE:
950	{	1014	{
		1015	int fd = s_fileno_croak (fh, 0);
951	dREQ;	1016	dREQ;
952		1017
953	req->type = REQ_READAHEAD;	1018	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	1019	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1020	req->int1 = fd;
956	req->offset = offset;	1021	req->offs = offset;
957	req->length = length;	1022	req->size = length;
958		1023
959	send_req (req);	1024	REQ_SEND;
960	}	1025	}
961		1026
962	void	1027	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1028	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	1029	ALIAS:
967	aio_stat = REQ_STAT	1030	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	1031	aio_lstat = EIO_LSTAT
		1032	aio_statvfs = EIO_STATVFS
969	CODE:	1033	PPCODE:
970	{	1034	{
971	dREQ;	1035	dREQ;
972		1036
973	New (0, req->statdata, 1, Stat_t);	1037	req->sv1 = newSVsv (fh_or_path);
974	if (!req->statdata)
975	{
976	free_req (req);
977	croak ("out of memory during aio_req->statdata allocation");
978	}
979		1038
980	if (SvPOK (fh_or_path))	1039	if (SvPOK (req->sv1))
981	{	1040	{
982	req->type = ix;	1041	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);	1042	req->ptr1 = SvPVbyte_nolen (req->sv1);
985	}	1043	}
986	else	1044	else
987	{	1045	{
988	req->type = REQ_FSTAT;	1046	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
989	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1047	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}	1048	}
992		1049
993	send_req (req);	1050	REQ_SEND;
994	}	1051	}
995		1052
996	void	1053	void
		1054	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1055	PPCODE:
		1056	{
		1057	dREQ;
		1058
		1059	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1060	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1061	req->sv1 = newSVsv (fh_or_path);
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_UTIME;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FUTIME;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->sv1 = newSVsv (fh_or_path);
		1084	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = EIO_TRUNCATE;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FTRUNCATE;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1102	ALIAS:
		1103	aio_chmod = EIO_CHMOD
		1104	aio_mkdir = EIO_MKDIR
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = mode;
		1110	req->sv1 = newSVsv (fh_or_path);
		1111
		1112	if (SvPOK (req->sv1))
		1113	{
		1114	req->type = ix;
		1115	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1116	}
		1117	else
		1118	{
		1119	req->type = EIO_FCHMOD;
		1120	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1121	}
		1122
		1123	REQ_SEND;
		1124	}
		1125
		1126	void
		1127	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1128	PPCODE:
		1129	{
		1130	dREQ;
		1131
		1132	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1133	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1134	req->sv1 = newSVsv (fh_or_path);
		1135
		1136	if (SvPOK (req->sv1))
		1137	{
		1138	req->type = EIO_CHOWN;
		1139	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1140	}
		1141	else
		1142	{
		1143	req->type = EIO_FCHOWN;
		1144	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1145	}
		1146
		1147	REQ_SEND;
		1148	}
		1149
		1150	void
		1151	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1152	PPCODE:
		1153	{
		1154	dREQ;
		1155
		1156	req->type = EIO_READDIR;
		1157	req->sv1 = newSVsv (pathname);
		1158	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1159	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1160
		1161	if (flags & EIO_READDIR_DENTS)
		1162	req->int1 |= EIO_READDIR_CUSTOM2;
		1163
		1164	REQ_SEND;
		1165	}
		1166
		1167	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1168	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1169	ALIAS:
1001	aio_unlink = REQ_UNLINK	1170	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	1171	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	1172	aio_readdir = EIO_READDIR
1004	CODE:	1173	PPCODE:
1005	{	1174	{
1006	dREQ;	1175	dREQ;
1007		1176
1008	req->type = ix;	1177	req->type = ix;
1009	req->data = newSVsv (pathname);	1178	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1179	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011
1012	send_req (req);
1013	}
1014		1180
		1181	REQ_SEND;
		1182	}
		1183
1015	void	1184	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1185	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	1186	ALIAS:
1021	aio_link = REQ_LINK	1187	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	1188	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	1189	aio_rename = EIO_RENAME
1024	CODE:	1190	PPCODE:
1025	{	1191	{
1026	dREQ;	1192	dREQ;
1027		1193
1028	req->type = ix;	1194	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1195	req->sv1 = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1196	req->ptr1 = SvPVbyte_nolen (req->sv1);
1031	req->data = newSVsv (newpath);	1197	req->sv2 = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1198	req->ptr2 = SvPVbyte_nolen (req->sv2);
1033		1199
1034	send_req (req);	1200	REQ_SEND;
1035	}	1201	}
		1202
		1203	void
		1204	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1205	PPCODE:
		1206	{
		1207	dREQ;
		1208
		1209	req->type = EIO_MKNOD;
		1210	req->sv1 = newSVsv (pathname);
		1211	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1212	req->int2 = (mode_t)mode;
		1213	req->offs = dev;
		1214
		1215	REQ_SEND;
		1216	}
		1217
		1218	void
		1219	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1220	ALIAS:
		1221	aio_mtouch = EIO_MTOUCH
		1222	aio_msync = EIO_MSYNC
		1223	PROTOTYPE: $$$$;$
		1224	PPCODE:
		1225	{
		1226	STRLEN svlen;
		1227	UV len = SvUV (length);
		1228	char *svptr = SvPVbyte (data, svlen);
		1229
		1230	if (offset < 0)
		1231	offset += svlen;
		1232
		1233	if (offset < 0 || offset > svlen)
		1234	croak ("offset outside of scalar");
		1235
		1236	if (!SvOK (length) || len + offset > svlen)
		1237	len = svlen - offset;
		1238
		1239	{
		1240	dREQ;
		1241
		1242	req->type = ix;
		1243	req->size = len;
		1244	req->sv2 = SvREFCNT_inc (data);
		1245	req->ptr2 = (char *)svptr + offset;
		1246	req->int1 = flags;
		1247
		1248	REQ_SEND;
		1249	}
		1250	}
		1251
		1252	void
		1253	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1254	PPCODE:
		1255	{
		1256	dREQ;
		1257
		1258	req->type = EIO_BUSY;
		1259	req->nv1 = delay < 0. ? 0. : delay;
		1260
		1261	REQ_SEND;
		1262	}
		1263
		1264	void
		1265	aio_group (SV *callback=&PL_sv_undef)
		1266	PROTOTYPE: ;$
		1267	PPCODE:
		1268	{
		1269	dREQ;
		1270
		1271	req->type = EIO_GROUP;
		1272
		1273	req_submit (req);
		1274	XPUSHs (req_sv (req, aio_grp_stash));
		1275	}
		1276
		1277	void
		1278	aio_nop (SV *callback=&PL_sv_undef)
		1279	ALIAS:
		1280	aio_nop = EIO_NOP
		1281	aio_sync = EIO_SYNC
		1282	PPCODE:
		1283	{
		1284	dREQ;
		1285
		1286	req->type = ix;
		1287
		1288	REQ_SEND;
		1289	}
		1290
		1291	int
		1292	aioreq_pri (int pri = 0)
		1293	PROTOTYPE: ;$
		1294	CODE:
		1295	RETVAL = next_pri;
		1296	if (items > 0)
		1297	{
		1298	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1299	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1300	next_pri = pri;
		1301	}
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	void
		1306	aioreq_nice (int nice = 0)
		1307	CODE:
		1308	nice = next_pri - nice;
		1309	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1310	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1311	next_pri = nice;
1036		1312
1037	void	1313	void
1038	flush ()	1314	flush ()
1039	PROTOTYPE:	1315	PROTOTYPE:
1040	CODE:	1316	CODE:
1041	while (nreqs)	1317	while (eio_nreqs ())
1042	{	1318	{
1043	poll_wait ();	1319	poll_wait ();
1044	poll_cb ();	1320	poll_cb ();
1045	}	1321	}
1046		1322
1047	void	1323	int
1048	poll()	1324	poll()
1049	PROTOTYPE:	1325	PROTOTYPE:
1050	CODE:	1326	CODE:
1051	if (nreqs)
1052	{
1053	poll_wait ();	1327	poll_wait ();
1054	poll_cb ();	1328	RETVAL = poll_cb ();
1055	}	1329	OUTPUT:
		1330	RETVAL
1056		1331
1057	int	1332	int
1058	poll_fileno()	1333	poll_fileno()
1059	PROTOTYPE:	1334	PROTOTYPE:
1060	CODE:	1335	CODE:
1061	RETVAL = respipe [0];	1336	RETVAL = s_epipe_fd (&respipe);
1062	OUTPUT:	1337	OUTPUT:
1063	RETVAL	1338	RETVAL
1064		1339
1065	int	1340	int
1066	poll_cb(...)	1341	poll_cb(...)
…		…
1072		1347
1073	void	1348	void
1074	poll_wait()	1349	poll_wait()
1075	PROTOTYPE:	1350	PROTOTYPE:
1076	CODE:	1351	CODE:
1077	if (nreqs)
1078	poll_wait ();	1352	poll_wait ();
1079		1353
1080	int	1354	int
1081	nreqs()	1355	nreqs()
1082	PROTOTYPE:	1356	PROTOTYPE:
1083	CODE:	1357	CODE:
1084	RETVAL = nreqs;	1358	RETVAL = eio_nreqs ();
1085	OUTPUT:	1359	OUTPUT:
1086	RETVAL	1360	RETVAL
1087		1361
		1362	int
		1363	nready()
		1364	PROTOTYPE:
		1365	CODE:
		1366	RETVAL = eio_nready ();
		1367	OUTPUT:
		1368	RETVAL
		1369
		1370	int
		1371	npending()
		1372	PROTOTYPE:
		1373	CODE:
		1374	RETVAL = eio_npending ();
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	int
		1379	nthreads()
		1380	PROTOTYPE:
		1381	CODE:
		1382	RETVAL = eio_nthreads ();
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
		1387	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1388	PROTOTYPE: $$$$
		1389	CODE:
		1390	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1391	RETVAL = posix_fadvise (fh, offset, length, advice);
		1392	#else
		1393	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1394	#endif
		1395	OUTPUT:
		1396	RETVAL
		1397
		1398	ssize_t
		1399	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1400	PROTOTYPE: $$$$
		1401	CODE:
		1402	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1403	OUTPUT:
		1404	RETVAL
		1405
		1406	void
		1407	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1408	PROTOTYPE: $$$$$;$
		1409	PPCODE:
		1410	sv_unmagic (scalar, MMAP_MAGIC);
		1411	{
		1412	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1413	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1414	if (addr == (void *)-1)
		1415	XSRETURN_NO;
		1416
		1417	sv_force_normal (scalar);
		1418
		1419	/* we store the length in mg_obj, as namlen is I32 :/ */
		1420	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1421	->mg_obj = (SV *)length;
		1422
		1423	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1424
		1425	if (!(prot & PROT_WRITE))
		1426	SvREADONLY_on (scalar);
		1427
		1428	if (SvLEN (scalar))
		1429	Safefree (SvPVX (scalar));
		1430
		1431	SvPVX (scalar) = (char *)addr;
		1432	SvCUR_set (scalar, length);
		1433	SvLEN_set (scalar, 0);
		1434	SvPOK_only (scalar);
		1435
		1436	XSRETURN_YES;
		1437	}
		1438
		1439	void
		1440	munmap (SV *scalar)
		1441	PROTOTYPE: $
		1442	CODE:
		1443	sv_unmagic (scalar, MMAP_MAGIC);
		1444
		1445	int
		1446	madvise (SV *scalar, off_t offset, off_t length, IV advice)
		1447	PROTOTYPE: $$$$
		1448	CODE:
		1449	{
		1450	char *addr = SvPV_nolen (scalar) + offset;
		1451
		1452	if (!SvOK (ST (2)))
		1453	length = SvCUR (scalar) - offset;
		1454
		1455	if (addr >= SvEND (scalar) || length <= 0)
		1456	XSRETURN_EMPTY;
		1457
		1458	#if _XOPEN_SOURCE >= 600 && !NO_MADVISE
		1459	RETVAL = posix_madvise (addr, length, advice);
		1460	#else
		1461	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1462	#endif
		1463	}
		1464	OUTPUT:
		1465	RETVAL
		1466
		1467	int
		1468	mlockall (int flags)
		1469	PROTOTYPE: $
		1470	CODE:
		1471	#if _POSIX_MEMLOCK
		1472	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1473	extern int mallopt (int, int);
		1474	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1475	#endif
		1476	mlockall (flags);
		1477	#else
		1478	RETVAL = -1;
		1479	errno = ENOSYS;
		1480	#endif
		1481	OUTPUT:
		1482	RETVAL
		1483
		1484	int
		1485	munlockall ()
		1486	PROTOTYPE:
		1487	CODE:
		1488	#if _POSIX_MEMLOCK
		1489	munlockall ();
		1490	#else
		1491	RETVAL = -1;
		1492	errno = ENOSYS;
		1493	#endif
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	void _on_next_submit (SV *cb)
		1498	CODE:
		1499	SvREFCNT_dec (on_next_submit);
		1500	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1501
		1502	PROTOTYPES: DISABLE
		1503
		1504	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1505
		1506	void
		1507	cancel (aio_req_ornot req)
		1508	CODE:
		1509	eio_cancel (req);
		1510
		1511	void
		1512	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1513	PPCODE:
		1514	{
		1515	if (GIMME_V != G_VOID)
		1516	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1517
		1518	if (items > 1)
		1519	{
		1520	SV *cb_cv =get_cb (callback);
		1521
		1522	SvREFCNT_dec (req->callback);
		1523	req->callback = SvREFCNT_inc (cb_cv);
		1524	}
		1525	}
		1526
		1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1528
		1529	void
		1530	add (aio_req grp, ...)
		1531	PPCODE:
		1532	{
		1533	int i;
		1534
		1535	if (grp->int1 == 2)
		1536	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1537
		1538	for (i = 1; i < items; ++i )
		1539	{
		1540	aio_req req;
		1541
		1542	if (GIMME_V != G_VOID)
		1543	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1544
		1545	req = SvAIO_REQ (ST (i));
		1546
		1547	if (req)
		1548	eio_grp_add (grp, req);
		1549	}
		1550	}
		1551
		1552	void
		1553	cancel_subs (aio_req_ornot req)
		1554	CODE:
		1555	req_cancel_subs (req);
		1556
		1557	void
		1558	result (aio_req grp, ...)
		1559	CODE:
		1560	{
		1561	int i;
		1562	AV *av;
		1563
		1564	grp->errorno = errno;
		1565
		1566	av = newAV ();
		1567	av_extend (av, items - 1);
		1568
		1569	for (i = 1; i < items; ++i )
		1570	av_push (av, newSVsv (ST (i)));
		1571
		1572	SvREFCNT_dec (grp->sv1);
		1573	grp->sv1 = (SV *)av;
		1574	}
		1575
		1576	void
		1577	errno (aio_req grp, int errorno = errno)
		1578	CODE:
		1579	grp->errorno = errorno;
		1580
		1581	void
		1582	limit (aio_req grp, int limit)
		1583	CODE:
		1584	eio_grp_limit (grp, limit);
		1585
		1586	void
		1587	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1588	CODE:
		1589	{
		1590	SvREFCNT_dec (grp->sv2);
		1591	grp->sv2 = newSVsv (callback);
		1592	grp->feed = aio_grp_feed;
		1593
		1594	if (grp->int2 <= 0)
		1595	grp->int2 = 2;
		1596
		1597	eio_grp_limit (grp, grp->int2);
		1598	}
		1599

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