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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.176 by root, Thu Dec 2 10:04:47 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/config.h"
		124	#include "libeio/eio.h"
		125
		126	#ifndef POSIX_FADV_NORMAL
		127	# define POSIX_FADV_NORMAL 0
		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	#if !HAVE_POSIX_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	#endif
		152	#ifndef POSIX_MADV_SEQUENTIAL
		153	# define POSIX_MADV_SEQUENTIAL 0
		154	#endif
		155	#ifndef POSIX_MADV_RANDOM
		156	# define POSIX_MADV_RANDOM 0
		157	#endif
		158	#ifndef POSIX_MADV_WILLNEED
		159	# define POSIX_MADV_WILLNEED 0
		160	#endif
		161	#ifndef POSIX_MADV_DONTNEED
		162	# define POSIX_MADV_DONTNEED 0
		163	#endif
		164
		165	#if !HAVE_POSIX_MADVISE
		166	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		167	#endif
		168
		169	#ifndef PROT_NONE
		170	# define PROT_NONE 0
		171	#endif
		172	#ifndef PROT_READ
		173	# define PROT_READ 0
		174	#endif
		175	#ifndef PROT_WRITE
		176	# define PROT_READ 0
		177	#endif
		178	#ifndef PROT_EXEC
		179	# define PROT_EXEC 0
		180	#endif
		181
		182	#ifndef ST_NODEV
		183	# define ST_NODEV 0
		184	#endif
		185	#ifndef ST_NOEXEC
		186	# define ST_NOEXEC 0
		187	#endif
		188	#ifndef ST_SYNCHRONOUS
		189	# define ST_SYNCHRONOUS 0
		190	#endif
		191	#ifndef ST_MANDLOCK
		192	# define ST_MANDLOCK 0
		193	#endif
		194	#ifndef ST_WRITE
		195	# define ST_WRITE 0
		196	#endif
		197	#ifndef ST_APPEND
		198	# define ST_APPEND 0
		199	#endif
		200	#ifndef ST_IMMUTABLE
		201	# define ST_IMMUTABLE 0
		202	#endif
		203	#ifndef ST_NOATIME
		204	# define ST_NOATIME 0
		205	#endif
		206	#ifndef ST_NODIRATIME
		207	# define ST_NODIRATIME 0
		208	#endif
		209	#ifndef ST_RELATIME
		210	# define ST_RELATIME 0
		211	#endif
		212
		213	#ifndef MAP_ANONYMOUS
		214	# ifdef MAP_ANON
		215	# define MAP_ANONYMOUS MAP_ANON
32	# else	216	# else
33	# error sendfile support requested but not available	217	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	218	# endif
35	#endif	219	#endif
36		220	#ifndef MAP_HUGETLB
37	/* used for struct dirent, AIX doesn't provide it */	221	# define MAP_HUGETLB 0
38	#ifndef NAME_MAX
39	# define NAME_MAX 4096
40	#endif	222	#endif
41		223	#ifndef MAP_LOCKED
42	#if __ia64	224	# define MAP_LOCKED 0
43	# define STACKSIZE 65536
44	#else
45	# define STACKSIZE 8192
46	#endif	225	#endif
		226	#ifndef MAP_NORESERVE
		227	# define MAP_NORESERVE 0
		228	#endif
		229	#ifndef MAP_POPULATE
		230	# define MAP_POPULATE 0
		231	#endif
		232	#ifndef MAP_NONBLOCK
		233	# define MAP_NONBLOCK 0
		234	#endif
		235
		236	#ifndef PAGESIZE
		237	# define PAGESIZE sysconf (_SC_PAGESIZE)
		238	#endif
		239
		240	static int req_invoke (eio_req *req);
		241	#define EIO_FINISH(req) req_invoke (req)
		242	static void req_destroy (eio_req *grp);
		243	#define EIO_DESTROY(req) req_destroy (req)
47		244
48	enum {	245	enum {
49	REQ_QUIT,	246	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	};	247	};
59		248
60	typedef struct aio_cb {	249	#include "libeio/eio.c"
61	struct aio_cb *volatile next;
62		250
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;	251	typedef eio_req *aio_req;
		252	typedef eio_req *aio_req_ornot;
81		253
82	static int started, wanted;	254	static SV *on_next_submit;
83	static volatile int nreqs;	255	static int next_pri = EIO_PRI_DEFAULT;
84	static int max_outstanding = 1<<30;	256	static int max_outstanding;
85	static int respipe [2];
86		257
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static s_epipe respipe;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		259
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	260	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)	261	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		262
		263	static void want_poll (void)
		264	{
		265	/* write a dummy byte to the pipe so fh becomes ready */
		266	s_epipe_signal (&respipe);
		267	}
		268
		269	static void done_poll (void)
		270	{
		271	/* read any signals sent by the worker threads */
		272	s_epipe_drain (&respipe);
		273	}
		274
		275	/* must be called at most once */
		276	static SV *req_sv (aio_req req, HV *stash)
		277	{
99	if (req->fh)	278	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	{	279	{
122	fd_set rfd;	280	req->self = (SV *)newHV ();
123	FD_ZERO(&rfd);	281	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	}	282	}
128	}
129		283
130	static int	284	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
131	poll_cb ()	285	}
132	{
133	dSP;
134	int count = 0;
135	int do_croak = 0;
136	aio_req req;
137		286
138	for (;;)	287	static aio_req SvAIO_REQ (SV *sv)
		288	{
		289	MAGIC *mg;
		290
		291	if (!SvROK (sv)
		292	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		293	&& SvSTASH (SvRV (sv)) != aio_req_stash
		294	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		295	croak ("object of class IO::AIO::REQ expected");
		296
		297	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		298
		299	return mg ? (aio_req)mg->mg_ptr : 0;
		300	}
		301
		302	static void aio_grp_feed (aio_req grp)
		303	{
		304	if (grp->sv2 && SvOK (grp->sv2))
139	{	305	{
140	pthread_mutex_lock (&reslock);	306	dSP;
141	req = ress;
142		307
143	if (req)	308	ENTER;
		309	SAVETMPS;
		310	PUSHMARK (SP);
		311	XPUSHs (req_sv (grp, aio_grp_stash));
		312	PUTBACK;
		313	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		314	SPAGAIN;
		315	FREETMPS;
		316	LEAVE;
		317	}
		318	}
		319
		320	static void req_submit (eio_req *req)
		321	{
		322	eio_submit (req);
		323
		324	if (expect_false (on_next_submit))
		325	{
		326	dSP;
		327	SV *cb = sv_2mortal (on_next_submit);
		328
		329	on_next_submit = 0;
		330
		331	PUSHMARK (SP);
		332	PUTBACK;
		333	call_sv (cb, G_DISCARD | G_EVAL);
		334	}
		335	}
		336
		337	static int req_invoke (eio_req *req)
		338	{
		339	if (req->flags & FLAG_SV2_RO_OFF)
		340	SvREADONLY_off (req->sv2);
		341
		342	if (!EIO_CANCELLED (req) && req->callback)
		343	{
		344	dSP;
		345	static SV *sv_result_cache; /* caches the result integer SV */
		346	SV *sv_result;
		347
		348	ENTER;
		349	SAVETMPS;
		350	PUSHMARK (SP);
		351	EXTEND (SP, 1);
		352
		353	/* do not recreate the result IV from scratch each time */
		354	if (expect_true (sv_result_cache))
144	{	355	{
145	ress = req->next;	356	sv_result = sv_result_cache; sv_result_cache = 0;
146		357	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	}	358	}
698	else	359	else
699	{	360	{
700	rese = ress = req;	361	sv_result = newSViv (req->result);
701		362	SvREADONLY_on (sv_result);
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}	363	}
705		364
706	pthread_mutex_unlock (&reslock);	365	switch (req->type)
		366	{
		367	case EIO_READDIR:
		368	{
		369	SV *rv = &PL_sv_undef;
		370
		371	if (req->result >= 0)
		372	{
		373	int i;
		374	char *names = (char *)req->ptr2;
		375	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		376	AV *av = newAV ();
		377
		378	av_extend (av, req->result - 1);
		379
		380	for (i = 0; i < req->result; ++i)
		381	{
		382	if (req->int1 & EIO_READDIR_DENTS)
		383	{
		384	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		385
		386	if (req->int1 & EIO_READDIR_CUSTOM2)
		387	{
		388	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		389	AV *avent = newAV ();
		390
		391	av_extend (avent, 2);
		392
		393	if (!sv_type [ent->type])
		394	{
		395	sv_type [ent->type] = newSViv (ent->type);
		396	SvREADONLY_on (sv_type [ent->type]);
		397	}
		398
		399	av_store (avent, 0, namesv);
		400	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		401	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		402
		403	av_store (av, i, newRV_noinc ((SV *)avent));
		404	}
		405	else
		406	av_store (av, i, namesv);
		407
		408	++ent;
		409	}
		410	else
		411	{
		412	SV *name = newSVpv (names, 0);
		413	av_store (av, i, name);
		414	names += SvCUR (name) + 1;
		415	}
		416	}
		417
		418	rv = sv_2mortal (newRV_noinc ((SV *)av));
		419	}
		420
		421	PUSHs (rv);
		422
		423	if (req->int1 & EIO_READDIR_CUSTOM1)
		424	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		425	}
		426	break;
		427
		428	case EIO_OPEN:
		429	{
		430	/* convert fd to fh */
		431	SV *fh = &PL_sv_undef;
		432
		433	if (req->result >= 0)
		434	{
		435	GV *gv = (GV *)sv_newmortal ();
		436	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		437	char sym [64];
		438	int symlen;
		439
		440	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		441	gv_init (gv, aio_stash, sym, symlen, 0);
		442
		443	symlen = snprintf (
		444	sym,
		445	sizeof (sym),
		446	"%s&=%d",
		447	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		448	(int)req->result
		449	);
		450
		451	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		452	fh = (SV *)gv;
		453	}
		454
		455	PUSHs (fh);
		456	}
		457	break;
		458
		459	case EIO_STATVFS:
		460	case EIO_FSTATVFS:
		461	{
		462	SV *rv = &PL_sv_undef;
		463
		464	if (req->result >= 0)
		465	{
		466	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		467	HV *hv = newHV ();
		468
		469	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		470
		471	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		472	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		473	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		474	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		475	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		476	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		477	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		478	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		479	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		480	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		481	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		482	}
		483
		484	PUSHs (rv);
		485	}
		486
		487	break;
		488
		489	case EIO_GROUP:
		490	req->int1 = 2; /* mark group as finished */
		491
		492	if (req->sv1)
		493	{
		494	int i;
		495	AV *av = (AV *)req->sv1;
		496
		497	EXTEND (SP, AvFILL (av) + 1);
		498	for (i = 0; i <= AvFILL (av); ++i)
		499	PUSHs (*av_fetch (av, i, 0));
		500	}
		501	break;
		502
		503	case EIO_NOP:
		504	case EIO_BUSY:
		505	break;
		506
		507	case EIO_READLINK:
		508	if (req->result > 0)
		509	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		510	break;
		511
		512	case EIO_STAT:
		513	case EIO_LSTAT:
		514	case EIO_FSTAT:
		515	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		516	PL_laststatval = req->result;
		517	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		518	PUSHs (sv_result);
		519	break;
		520
		521	case EIO_READ:
		522	{
		523	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		524	*SvEND (req->sv2) = 0;
		525	SvPOK_only (req->sv2);
		526	SvSETMAGIC (req->sv2);
		527	PUSHs (sv_result);
		528	}
		529	break;
		530
		531	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		532	if (req->result > 0)
		533	SvIV_set (sv_result, 0);
		534	/* FALLTHROUGH */
		535
		536	default:
		537	PUSHs (sv_result);
		538	break;
		539	}
		540
		541	errno = req->errorno;
		542
		543	PUTBACK;
		544	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		545	SPAGAIN;
		546
		547	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		548	SvREFCNT_dec (sv_result);
		549	else
		550	sv_result_cache = sv_result;
		551
		552	FREETMPS;
		553	LEAVE;
		554
		555	PUTBACK;
707	}	556	}
708	while (type != REQ_QUIT);	557
		558	return !!SvTRUE (ERRSV);
		559	}
		560
		561	static void req_destroy (aio_req req)
		562	{
		563	if (req->self)
		564	{
		565	sv_unmagic (req->self, PERL_MAGIC_ext);
		566	SvREFCNT_dec (req->self);
		567	}
		568
		569	SvREFCNT_dec (req->sv1);
		570	SvREFCNT_dec (req->sv2);
		571	SvREFCNT_dec (req->callback);
		572
		573	Safefree (req);
		574	}
		575
		576	static void req_cancel_subs (aio_req grp)
		577	{
		578	aio_req sub;
		579
		580	if (grp->type != EIO_GROUP)
		581	return;
		582
		583	SvREFCNT_dec (grp->sv2);
		584	grp->sv2 = 0;
		585
		586	eio_grp_cancel (grp);
		587	}
		588
		589	static void
		590	create_respipe (void)
		591	{
		592	if (s_epipe_renew (&respipe))
		593	croak ("IO::AIO: unable to initialize result pipe");
		594	}
		595
		596	static void poll_wait (void)
		597	{
		598	while (eio_nreqs ())
		599	{
		600	int size;
		601
		602	X_LOCK (reslock);
		603	size = res_queue.size;
		604	X_UNLOCK (reslock);
		605
		606	if (size)
		607	return;
		608
		609	etp_maybe_start_thread ();
		610
		611	s_epipe_wait (&respipe);
		612	}
		613	}
		614
		615	static int poll_cb (void)
		616	{
		617	for (;;)
		618	{
		619	int res = eio_poll ();
		620
		621	if (res > 0)
		622	croak (0);
		623
		624	if (!max_outstanding || max_outstanding > eio_nreqs ())
		625	return res;
		626
		627	poll_wait ();
		628	}
		629	}
		630
		631	static void atfork_child (void)
		632	{
		633	create_respipe ();
		634	}
		635
		636	/*****************************************************************************/
		637
		638	#if !_POSIX_MAPPED_FILES
		639	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		640	# define munmap(addr,length) (errno = ENOSYS, -1)
		641	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		642	# define PROT_NONE 0
		643	# define PROT_WRITE 0
		644	# define MAP_PRIVATE 0
		645	# define MAP_SHARED 0
		646	# define MAP_FIXED 0
		647	#endif
		648
		649	#define MMAP_MAGIC PERL_MAGIC_ext
		650
		651	static int
		652	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		653	{
		654	int old_errno = errno;
		655	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		656	errno = old_errno;
		657
		658	mg->mg_obj = 0; /* just in case */
		659
		660	SvREADONLY_off (sv);
		661
		662	if (SvPVX (sv) != mg->mg_ptr)
		663	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		664
		665	SvCUR_set (sv, 0);
		666	SvPVX (sv) = 0;
		667	SvOK_off (sv);
709		668
710	return 0;	669	return 0;
711	}	670	}
712		671
		672	static MGVTBL mmap_vtbl = {
		673	0, 0, 0, 0, mmap_free
		674	};
		675
713	/*****************************************************************************/	676	/*****************************************************************************/
714		677
715	static void atfork_prepare (void)	678	static SV *
		679	get_cb (SV *cb_sv)
716	{	680	{
717	pthread_mutex_lock (&reqlock);	681	SvGETMAGIC (cb_sv);
718	pthread_mutex_lock (&reslock);	682	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	}	683	}
769		684
770	#define dREQ \	685	#define dREQ \
		686	SV *cb_cv; \
771	aio_req req; \	687	aio_req req; \
		688	int req_pri = next_pri; \
		689	next_pri = EIO_PRI_DEFAULT; \
772	\	690	\
773	if (SvOK (callback) && !SvROK (callback)) \	691	cb_cv = get_cb (callback); \
774	croak ("clalback must be undef or of reference type"); \
775	\	692	\
776	Newz (0, req, 1, aio_cb); \	693	Newz (0, req, 1, eio_req); \
777	if (!req) \	694	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	695	croak ("out of memory during eio_req allocation"); \
779	\	696	\
780	req->callback = newSVsv (callback);	697	req->callback = SvREFCNT_inc (cb_cv); \
781		698	req->pri = req_pri
		699
		700	#define REQ_SEND \
		701	PUTBACK; \
		702	req_submit (req); \
		703	SPAGAIN; \
		704	\
		705	if (GIMME_V != G_VOID) \
		706	XPUSHs (req_sv (req, aio_req_stash));
		707
782	MODULE = IO::AIO PACKAGE = IO::AIO	708	MODULE = IO::AIO PACKAGE = IO::AIO
783		709
784	PROTOTYPES: ENABLE	710	PROTOTYPES: ENABLE
785		711
786	BOOT:	712	BOOT:
787	{	713	{
		714	static const struct {
		715	const char *name;
		716	IV iv;
		717	} *civ, const_iv[] = {
		718	# define const_niv(name, value) { # name, (IV) value },
		719	# define const_iv(name) { # name, (IV) name },
		720	# define const_eio(name) { # name, (IV) EIO_ ## name },
		721	const_iv (EXDEV)
		722	const_iv (ENOSYS)
		723	const_iv (O_RDONLY)
		724	const_iv (O_WRONLY)
		725	const_iv (O_RDWR)
		726	const_iv (O_CREAT)
		727	const_iv (O_TRUNC)
		728	const_iv (O_EXCL)
		729	const_iv (O_APPEND)
		730	#ifndef _WIN32
		731	const_iv (S_IFIFO)
		732	#endif
		733	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		734	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		735	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		736	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		737	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		738	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		739
		740	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		741	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		742	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		743	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		744	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		745
		746	const_iv (ST_RDONLY)
		747	const_iv (ST_NOSUID)
		748	const_iv (ST_NODEV)
		749	const_iv (ST_NOEXEC)
		750	const_iv (ST_SYNCHRONOUS)
		751	const_iv (ST_MANDLOCK)
		752	const_iv (ST_WRITE)
		753	const_iv (ST_APPEND)
		754	const_iv (ST_IMMUTABLE)
		755	const_iv (ST_NOATIME)
		756	const_iv (ST_NODIRATIME)
		757	const_iv (ST_RELATIME)
		758
		759	const_iv (PROT_NONE)
		760	const_iv (PROT_EXEC)
		761	const_iv (PROT_READ)
		762	const_iv (PROT_WRITE)
		763
		764	/*const_iv (MAP_FIXED)*/
		765	const_iv (MAP_PRIVATE)
		766	const_iv (MAP_SHARED)
		767	const_iv (MAP_ANONYMOUS)
		768
		769	/* linuxish */
		770	const_iv (MAP_HUGETLB)
		771	const_iv (MAP_LOCKED)
		772	const_iv (MAP_NORESERVE)
		773	const_iv (MAP_POPULATE)
		774	const_iv (MAP_NONBLOCK)
		775
		776	const_eio (MCL_FUTURE)
		777	const_eio (MCL_CURRENT)
		778
		779	const_eio (MS_ASYNC)
		780	const_eio (MS_INVALIDATE)
		781	const_eio (MS_SYNC)
		782
		783	const_eio (MT_MODIFY)
		784
		785	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		786	const_eio (SYNC_FILE_RANGE_WRITE)
		787	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		788
		789	const_eio (READDIR_DENTS)
		790	const_eio (READDIR_DIRS_FIRST)
		791	const_eio (READDIR_STAT_ORDER)
		792	const_eio (READDIR_FOUND_UNKNOWN)
		793
		794	const_eio (DT_UNKNOWN)
		795	const_eio (DT_FIFO)
		796	const_eio (DT_CHR)
		797	const_eio (DT_DIR)
		798	const_eio (DT_BLK)
		799	const_eio (DT_REG)
		800	const_eio (DT_LNK)
		801	const_eio (DT_SOCK)
		802	const_eio (DT_WHT)
		803	};
		804
788	HV *stash = gv_stashpv ("IO::AIO", 1);	805	aio_stash = gv_stashpv ("IO::AIO" , 1);
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	806	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	807	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
792		808
		809	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		810	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		811
		812	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		813
793	create_pipe ();	814	create_respipe ();
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
795	}
796		815
		816	if (eio_init (want_poll, done_poll) < 0)
		817	croak ("IO::AIO: unable to initialise eio library");
		818
		819	/* atfork child called in fifo order, so before eio's handler */
		820	X_THREAD_ATFORK (0, 0, atfork_child);
		821	}
		822
797	void	823	void
798	min_parallel (nthreads)	824	max_poll_reqs (int nreqs)
799	int nthreads
800	PROTOTYPE: $	825	PROTOTYPE: $
		826	CODE:
		827	eio_set_max_poll_reqs (nreqs);
801		828
802	void	829	void
803	max_parallel (nthreads)	830	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	831	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	832	CODE:
812	RETVAL = max_outstanding;	833	eio_set_max_poll_time (nseconds);
		834
		835	void
		836	min_parallel (int nthreads)
		837	PROTOTYPE: $
		838	CODE:
		839	eio_set_min_parallel (nthreads);
		840
		841	void
		842	max_parallel (int nthreads)
		843	PROTOTYPE: $
		844	CODE:
		845	eio_set_max_parallel (nthreads);
		846
		847	void
		848	max_idle (int nthreads)
		849	PROTOTYPE: $
		850	CODE:
		851	eio_set_max_idle (nthreads);
		852
		853	void
		854	max_outstanding (int maxreqs)
		855	PROTOTYPE: $
		856	CODE:
813	max_outstanding = nreqs;	857	max_outstanding = maxreqs;
814		858
815	void	859	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	860	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: $$$;$
822	CODE:	861	PPCODE:
823	{	862	{
824	dREQ;	863	dREQ;
825		864
826	req->type = REQ_OPEN;	865	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	866	req->sv1 = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	867	req->ptr1 = SvPVbyte_nolen (req->sv1);
829	req->fd = flags;	868	req->int1 = flags;
830	req->mode = mode;	869	req->int2 = mode;
831		870
832	send_req (req);	871	REQ_SEND;
833	}	872	}
834		873
835	void	874	void
836	aio_close (fh,callback=&PL_sv_undef)	875	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$
840	ALIAS:	876	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	877	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	878	aio_fdatasync = EIO_FDATASYNC
844	CODE:	879	PPCODE:
845	{	880	{
		881	int fd = s_fileno_croak (fh, 0);
846	dREQ;	882	dREQ;
847		883
848	req->type = ix;	884	req->type = ix;
849	req->fh = newSVsv (fh);	885	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	886	req->int1 = fd;
851		887
852	send_req (req);	888	REQ_SEND (req);
853	}	889	}
854		890
855	void	891	void
		892	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		893	PPCODE:
		894	{
		895	int fd = s_fileno_croak (fh, 0);
		896	dREQ;
		897
		898	req->type = EIO_SYNC_FILE_RANGE;
		899	req->sv1 = newSVsv (fh);
		900	req->int1 = fd;
		901	req->offs = offset;
		902	req->size = nbytes;
		903	req->int2 = flags;
		904
		905	REQ_SEND (req);
		906	}
		907
		908	void
		909	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		910	PPCODE:
		911	{
		912	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		913	int fd = s_fileno_croak (fh, 0);
		914	dREQ;
		915
		916	if (close_pipe < 0)
		917	{
		918	int pipefd [2];
		919
		920	if (pipe (pipefd) < 0
		921	|| close (pipefd [1]) < 0
		922	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		923	abort (); /*D*/
		924
		925	close_pipe = pipefd [0];
		926	}
		927
		928	req->type = EIO_DUP2;
		929	req->int1 = close_pipe;
		930	req->sv2 = newSVsv (fh);
		931	req->int2 = fd;
		932
		933	REQ_SEND (req);
		934	}
		935
		936	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	937	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:	938	ALIAS:
864	aio_read = REQ_READ	939	aio_read = EIO_READ
865	aio_write = REQ_WRITE	940	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$
867	CODE:	941	PPCODE:
868	{	942	{
869	aio_req req;
870	STRLEN svlen;	943	STRLEN svlen;
		944	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	945	char *svptr = SvPVbyte (data, svlen);
872		946	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		947
876	if (dataoffset < 0)	948	if (dataoffset < 0)
877	dataoffset += svlen;	949	dataoffset += svlen;
878		950
879	if (dataoffset < 0 || dataoffset > svlen)	951	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	952	croak ("dataoffset outside of data scalar");
881		953
882	if (ix == REQ_WRITE)	954	if (ix == EIO_WRITE)
883	{	955	{
884	/* write: check length and adjust. */	956	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	957	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	958	len = svlen - dataoffset;
887	}	959	}
888	else	960	else
889	{	961	{
890	/* read: grow scalar as necessary */	962	/* read: check type and grow scalar as necessary */
		963	SvUPGRADE (data, SVt_PV);
891	svptr = SvGROW (data, length + dataoffset);	964	svptr = SvGROW (data, len + dataoffset + 1);
892	}	965	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		966
897	{	967	{
898	dREQ;	968	dREQ;
899		969
900	req->type = ix;	970	req->type = ix;
901	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	972	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	973	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	974	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	975	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	976	req->ptr2 = (char *)svptr + dataoffset;
		977	req->stroffset = dataoffset;
908		978
909	if (!SvREADONLY (data))	979	if (!SvREADONLY (data))
910	{	980	{
911	SvREADONLY_on (data);	981	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	982	req->flags |= FLAG_SV2_RO_OFF;
913	}	983	}
914		984
915	send_req (req);	985	REQ_SEND;
916	}	986	}
917	}	987	}
918		988
919	void	989	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	990	aio_readlink (SV8 *path, 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: $$$$;$
927	CODE:	991	PPCODE:
928	{	992	{
		993	SV *data;
		994	dREQ;
		995
		996	req->type = EIO_READLINK;
		997	req->sv1 = newSVsv (path);
		998	req->ptr1 = SvPVbyte_nolen (req->sv1);
		999
		1000	REQ_SEND;
		1001	}
		1002
		1003	void
		1004	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1005	PPCODE:
		1006	{
		1007	int ifd = s_fileno_croak (in_fh , 0);
		1008	int ofd = s_fileno_croak (out_fh, 1);
929	dREQ;	1009	dREQ;
930		1010
931	req->type = REQ_SENDFILE;	1011	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	1012	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1013	req->int1 = ofd;
934	req->fh2 = newSVsv (in_fh);	1014	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1015	req->int2 = ifd;
936	req->offset = in_offset;	1016	req->offs = in_offset;
937	req->length = length;	1017	req->size = length;
938		1018
939	send_req (req);	1019	REQ_SEND;
940	}	1020	}
941		1021
942	void	1022	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1023	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$
949	CODE:	1024	PPCODE:
950	{	1025	{
		1026	int fd = s_fileno_croak (fh, 0);
951	dREQ;	1027	dREQ;
952		1028
953	req->type = REQ_READAHEAD;	1029	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	1030	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1031	req->int1 = fd;
956	req->offset = offset;	1032	req->offs = offset;
957	req->length = length;	1033	req->size = length;
958		1034
959	send_req (req);	1035	REQ_SEND;
960	}	1036	}
961		1037
962	void	1038	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1039	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	1040	ALIAS:
967	aio_stat = REQ_STAT	1041	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	1042	aio_lstat = EIO_LSTAT
		1043	aio_statvfs = EIO_STATVFS
969	CODE:	1044	PPCODE:
970	{	1045	{
971	dREQ;	1046	dREQ;
972		1047
973	New (0, req->statdata, 1, Stat_t);	1048	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		1049
980	if (SvPOK (fh_or_path))	1050	if (SvPOK (req->sv1))
981	{	1051	{
982	req->type = ix;	1052	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);	1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
985	}	1054	}
986	else	1055	else
987	{	1056	{
988	req->type = REQ_FSTAT;	1057	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)));	1058	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}	1059	}
992		1060
993	send_req (req);	1061	REQ_SEND;
994	}	1062	}
995		1063
996	void	1064	void
		1065	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1066	PPCODE:
		1067	{
		1068	dREQ;
		1069
		1070	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1071	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1072	req->sv1 = newSVsv (fh_or_path);
		1073
		1074	if (SvPOK (req->sv1))
		1075	{
		1076	req->type = EIO_UTIME;
		1077	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1078	}
		1079	else
		1080	{
		1081	req->type = EIO_FUTIME;
		1082	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1083	}
		1084
		1085	REQ_SEND;
		1086	}
		1087
		1088	void
		1089	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->sv1 = newSVsv (fh_or_path);
		1095	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1096
		1097	if (SvPOK (req->sv1))
		1098	{
		1099	req->type = EIO_TRUNCATE;
		1100	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1101	}
		1102	else
		1103	{
		1104	req->type = EIO_FTRUNCATE;
		1105	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1106	}
		1107
		1108	REQ_SEND;
		1109	}
		1110
		1111	void
		1112	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1113	ALIAS:
		1114	aio_chmod = EIO_CHMOD
		1115	aio_mkdir = EIO_MKDIR
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->int2 = mode;
		1121	req->sv1 = newSVsv (fh_or_path);
		1122
		1123	if (SvPOK (req->sv1))
		1124	{
		1125	req->type = ix;
		1126	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1127	}
		1128	else
		1129	{
		1130	req->type = EIO_FCHMOD;
		1131	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1132	}
		1133
		1134	REQ_SEND;
		1135	}
		1136
		1137	void
		1138	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1139	PPCODE:
		1140	{
		1141	dREQ;
		1142
		1143	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1144	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1145	req->sv1 = newSVsv (fh_or_path);
		1146
		1147	if (SvPOK (req->sv1))
		1148	{
		1149	req->type = EIO_CHOWN;
		1150	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1151	}
		1152	else
		1153	{
		1154	req->type = EIO_FCHOWN;
		1155	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1156	}
		1157
		1158	REQ_SEND;
		1159	}
		1160
		1161	void
		1162	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1163	PPCODE:
		1164	{
		1165	dREQ;
		1166
		1167	req->type = EIO_READDIR;
		1168	req->sv1 = newSVsv (pathname);
		1169	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1170	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1171
		1172	if (flags & EIO_READDIR_DENTS)
		1173	req->int1 |= EIO_READDIR_CUSTOM2;
		1174
		1175	REQ_SEND;
		1176	}
		1177
		1178	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1179	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1180	ALIAS:
1001	aio_unlink = REQ_UNLINK	1181	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	1182	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	1183	aio_readdir = EIO_READDIR
1004	CODE:	1184	PPCODE:
1005	{	1185	{
1006	dREQ;	1186	dREQ;
1007		1187
1008	req->type = ix;	1188	req->type = ix;
1009	req->data = newSVsv (pathname);	1189	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1190	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011
1012	send_req (req);
1013	}
1014		1191
		1192	REQ_SEND;
		1193	}
		1194
1015	void	1195	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1196	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	1197	ALIAS:
1021	aio_link = REQ_LINK	1198	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	1199	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	1200	aio_rename = EIO_RENAME
1024	CODE:	1201	PPCODE:
1025	{	1202	{
1026	dREQ;	1203	dREQ;
1027		1204
1028	req->type = ix;	1205	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1206	req->sv1 = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1031	req->data = newSVsv (newpath);	1208	req->sv2 = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1209	req->ptr2 = SvPVbyte_nolen (req->sv2);
1033		1210
1034	send_req (req);	1211	REQ_SEND;
1035	}	1212	}
1036		1213
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	1214	void
1041	cancel_most_requests ()	1215	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1042	PROTOTYPE:	1216	PPCODE:
		1217	{
		1218	dREQ;
		1219
		1220	req->type = EIO_MKNOD;
		1221	req->sv1 = newSVsv (pathname);
		1222	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1223	req->int2 = (mode_t)mode;
		1224	req->offs = dev;
		1225
		1226	REQ_SEND;
		1227	}
		1228
		1229	void
		1230	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1231	ALIAS:
		1232	aio_mtouch = EIO_MTOUCH
		1233	aio_msync = EIO_MSYNC
1043	CODE:	1234	PPCODE:
1044	{	1235	{
1045	aio_req *req;	1236	STRLEN svlen;
		1237	char *svptr = SvPVbyte (data, svlen);
		1238	UV len = SvUV (length);
1046		1239
1047	pthread_mutex_lock (&reqlock);	1240	if (offset < 0)
1048	for (req = reqs; req; req = req->next)	1241	offset += svlen;
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		1242
1052	pthread_mutex_lock (&reslock);	1243	if (offset < 0 || offset > svlen)
1053	for (req = ress; req; req = req->next)	1244	croak ("offset outside of scalar");
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}
1057		1245
1058	#endif	1246	if (!SvOK (length) || len + offset > svlen)
		1247	len = svlen - offset;
		1248
		1249	{
		1250	dREQ;
		1251
		1252	req->type = ix;
		1253	req->sv2 = SvREFCNT_inc (data);
		1254	req->ptr2 = (char *)svptr + offset;
		1255	req->size = len;
		1256	req->int1 = flags;
		1257
		1258	REQ_SEND;
		1259	}
		1260	}
		1261
		1262	void
		1263	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1264	PPCODE:
		1265	{
		1266	STRLEN svlen;
		1267	char *svptr = SvPVbyte (data, svlen);
		1268	UV len = SvUV (length);
		1269
		1270	if (offset < 0)
		1271	offset += svlen;
		1272
		1273	if (offset < 0 || offset > svlen)
		1274	croak ("offset outside of scalar");
		1275
		1276	if (!SvOK (length) || len + offset > svlen)
		1277	len = svlen - offset;
		1278
		1279	{
		1280	dREQ;
		1281
		1282	req->type = EIO_MLOCK;
		1283	req->sv2 = SvREFCNT_inc (data);
		1284	req->ptr2 = (char *)svptr + offset;
		1285	req->size = len;
		1286
		1287	REQ_SEND;
		1288	}
		1289	}
		1290
		1291	void
		1292	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1293	PPCODE:
		1294	{
		1295	dREQ;
		1296
		1297	req->type = EIO_MLOCKALL;
		1298	req->int1 = flags;
		1299
		1300	REQ_SEND;
		1301	}
		1302
		1303	void
		1304	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1305	PPCODE:
		1306	{
		1307	dREQ;
		1308
		1309	req->type = EIO_BUSY;
		1310	req->nv1 = delay < 0. ? 0. : delay;
		1311
		1312	REQ_SEND;
		1313	}
		1314
		1315	void
		1316	aio_group (SV *callback=&PL_sv_undef)
		1317	PPCODE:
		1318	{
		1319	dREQ;
		1320
		1321	req->type = EIO_GROUP;
		1322
		1323	req_submit (req);
		1324	XPUSHs (req_sv (req, aio_grp_stash));
		1325	}
		1326
		1327	void
		1328	aio_nop (SV *callback=&PL_sv_undef)
		1329	ALIAS:
		1330	aio_nop = EIO_NOP
		1331	aio_sync = EIO_SYNC
		1332	PPCODE:
		1333	{
		1334	dREQ;
		1335
		1336	req->type = ix;
		1337
		1338	REQ_SEND;
		1339	}
		1340
		1341	int
		1342	aioreq_pri (int pri = 0)
		1343	CODE:
		1344	RETVAL = next_pri;
		1345	if (items > 0)
		1346	{
		1347	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1348	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1349	next_pri = pri;
		1350	}
		1351	OUTPUT:
		1352	RETVAL
		1353
		1354	void
		1355	aioreq_nice (int nice = 0)
		1356	CODE:
		1357	nice = next_pri - nice;
		1358	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1359	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1360	next_pri = nice;
1059		1361
1060	void	1362	void
1061	flush ()	1363	flush ()
1062	PROTOTYPE:
1063	CODE:	1364	CODE:
1064	while (nreqs)	1365	while (eio_nreqs ())
1065	{	1366	{
1066	poll_wait ();	1367	poll_wait ();
1067	poll_cb ();	1368	poll_cb ();
1068	}	1369	}
1069		1370
1070	void	1371	int
1071	poll()	1372	poll ()
1072	PROTOTYPE:
1073	CODE:	1373	CODE:
1074	if (nreqs)
1075	{
1076	poll_wait ();	1374	poll_wait ();
1077	poll_cb ();	1375	RETVAL = poll_cb ();
1078	}
1079
1080	int
1081	poll_fileno()
1082	PROTOTYPE:
1083	CODE:
1084	RETVAL = respipe [0];
1085	OUTPUT:	1376	OUTPUT:
1086	RETVAL	1377	RETVAL
1087		1378
1088	int	1379	int
		1380	poll_fileno ()
		1381	CODE:
		1382	RETVAL = s_epipe_fd (&respipe);
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
1089	poll_cb(...)	1387	poll_cb (...)
1090	PROTOTYPE:	1388	PROTOTYPE:
1091	CODE:	1389	CODE:
1092	RETVAL = poll_cb ();	1390	RETVAL = poll_cb ();
1093	OUTPUT:	1391	OUTPUT:
1094	RETVAL	1392	RETVAL
1095		1393
1096	void	1394	void
1097	poll_wait()	1395	poll_wait ()
1098	PROTOTYPE:
1099	CODE:	1396	CODE:
1100	if (nreqs)
1101	poll_wait ();	1397	poll_wait ();
1102		1398
1103	int	1399	int
1104	nreqs()	1400	nreqs ()
1105	PROTOTYPE:
1106	CODE:	1401	CODE:
1107	RETVAL = nreqs;	1402	RETVAL = eio_nreqs ();
1108	OUTPUT:	1403	OUTPUT:
1109	RETVAL	1404	RETVAL
1110		1405
		1406	int
		1407	nready ()
		1408	CODE:
		1409	RETVAL = eio_nready ();
		1410	OUTPUT:
		1411	RETVAL
		1412
		1413	int
		1414	npending ()
		1415	CODE:
		1416	RETVAL = eio_npending ();
		1417	OUTPUT:
		1418	RETVAL
		1419
		1420	int
		1421	nthreads ()
		1422	CODE:
		1423	RETVAL = eio_nthreads ();
		1424	OUTPUT:
		1425	RETVAL
		1426
		1427	int
		1428	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1429	CODE:
		1430	RETVAL = posix_fadvise (fh, offset, length, advice);
		1431	OUTPUT:
		1432	RETVAL
		1433
		1434	ssize_t
		1435	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1436	CODE:
		1437	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1438	OUTPUT:
		1439	RETVAL
		1440
		1441	void
		1442	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1443	PPCODE:
		1444	sv_unmagic (scalar, MMAP_MAGIC);
		1445	{
		1446	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1447	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1448	if (addr == (void *)-1)
		1449	XSRETURN_NO;
		1450
		1451	sv_force_normal (scalar);
		1452
		1453	/* we store the length in mg_obj, as namlen is I32 :/ */
		1454	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1455	->mg_obj = (SV *)length;
		1456
		1457	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1458
		1459	if (!(prot & PROT_WRITE))
		1460	SvREADONLY_on (scalar);
		1461
		1462	if (SvLEN (scalar))
		1463	Safefree (SvPVX (scalar));
		1464
		1465	SvPVX (scalar) = (char *)addr;
		1466	SvCUR_set (scalar, length);
		1467	SvLEN_set (scalar, 0);
		1468	SvPOK_only (scalar);
		1469
		1470	XSRETURN_YES;
		1471	}
		1472
		1473	void
		1474	munmap (SV *scalar)
		1475	CODE:
		1476	sv_unmagic (scalar, MMAP_MAGIC);
		1477
		1478	int
		1479	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1480	ALIAS:
		1481	mprotect = 1
		1482	CODE:
		1483	{
		1484	STRLEN svlen;
		1485	void *addr = SvPVbyte (scalar, svlen);
		1486	size_t len = SvUV (length);
		1487
		1488	if (offset < 0)
		1489	offset += svlen;
		1490
		1491	if (offset < 0 || offset > svlen)
		1492	croak ("offset outside of scalar");
		1493
		1494	if (!SvOK (length) || len + offset > svlen)
		1495	len = svlen - offset;
		1496
		1497	addr = (void *)(((intptr_t)addr) + offset);
		1498	eio_page_align (&addr, &len);
		1499
		1500	switch (ix)
		1501	{
		1502	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1503	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1504	}
		1505	}
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	int
		1510	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1511	CODE:
		1512	{
		1513	STRLEN svlen;
		1514	void *addr = SvPVbyte (scalar, svlen);
		1515	size_t len = SvUV (length);
		1516
		1517	if (offset < 0)
		1518	offset += svlen;
		1519
		1520	if (offset < 0 || offset > svlen)
		1521	croak ("offset outside of scalar");
		1522
		1523	if (!SvOK (length) || len + offset > svlen)
		1524	len = svlen - offset;
		1525
		1526	addr = (void *)(((intptr_t)addr) + offset);
		1527	eio_page_align (&addr, &len);
		1528	#if _POSIX_MEMLOCK
		1529	RETVAL = munlock (addr, len);
		1530	#else
		1531	RETVAL = ((errno = ENOSYS), -1);
		1532	#endif
		1533	}
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
		1538	munlockall ()
		1539	CODE:
		1540	#if _POSIX_MEMLOCK
		1541	munlockall ();
		1542	#else
		1543	RETVAL = -1;
		1544	errno = ENOSYS;
		1545	#endif
		1546	OUTPUT:
		1547	RETVAL
		1548
		1549	void _on_next_submit (SV *cb)
		1550	CODE:
		1551	SvREFCNT_dec (on_next_submit);
		1552	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1553
		1554	PROTOTYPES: DISABLE
		1555
		1556	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1557
		1558	void
		1559	cancel (aio_req_ornot req)
		1560	CODE:
		1561	eio_cancel (req);
		1562
		1563	void
		1564	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1565	PPCODE:
		1566	{
		1567	if (GIMME_V != G_VOID)
		1568	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1569
		1570	if (items > 1)
		1571	{
		1572	SV *cb_cv =get_cb (callback);
		1573
		1574	SvREFCNT_dec (req->callback);
		1575	req->callback = SvREFCNT_inc (cb_cv);
		1576	}
		1577	}
		1578
		1579	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1580
		1581	void
		1582	add (aio_req grp, ...)
		1583	PPCODE:
		1584	{
		1585	int i;
		1586
		1587	if (grp->int1 == 2)
		1588	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1589
		1590	for (i = 1; i < items; ++i )
		1591	{
		1592	aio_req req;
		1593
		1594	if (GIMME_V != G_VOID)
		1595	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1596
		1597	req = SvAIO_REQ (ST (i));
		1598
		1599	if (req)
		1600	eio_grp_add (grp, req);
		1601	}
		1602	}
		1603
		1604	void
		1605	cancel_subs (aio_req_ornot req)
		1606	CODE:
		1607	req_cancel_subs (req);
		1608
		1609	void
		1610	result (aio_req grp, ...)
		1611	CODE:
		1612	{
		1613	int i;
		1614	AV *av;
		1615
		1616	grp->errorno = errno;
		1617
		1618	av = newAV ();
		1619	av_extend (av, items - 1);
		1620
		1621	for (i = 1; i < items; ++i )
		1622	av_push (av, newSVsv (ST (i)));
		1623
		1624	SvREFCNT_dec (grp->sv1);
		1625	grp->sv1 = (SV *)av;
		1626	}
		1627
		1628	void
		1629	errno (aio_req grp, int errorno = errno)
		1630	CODE:
		1631	grp->errorno = errorno;
		1632
		1633	void
		1634	limit (aio_req grp, int limit)
		1635	CODE:
		1636	eio_grp_limit (grp, limit);
		1637
		1638	void
		1639	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1640	CODE:
		1641	{
		1642	SvREFCNT_dec (grp->sv2);
		1643	grp->sv2 = newSVsv (callback);
		1644	grp->feed = aio_grp_feed;
		1645
		1646	if (grp->int2 <= 0)
		1647	grp->int2 = 2;
		1648
		1649	eio_grp_limit (grp, grp->int2);
		1650	}
		1651

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