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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.171 by root, Wed Aug 4 17:16:19 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 <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
15	#include <limits.h>	17	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	18	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	19	#include <sched.h>
20		20
21	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
22	# if __linux
23	# include <sys/sendfile.h>	22	# include <sys/mman.h>
24	# elif __freebsd	23	#endif
25	# 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
26	# include <sys/uio.h>	68	# include <sys/time.h>
27	# elif __hpux
28	# include <sys/socket.h>
29	# elif __solaris /* not yet */
30	# 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	#if _XOPEN_SOURCE < 600 || NO_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	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef PROT_NONE
		171	# define PROT_NONE 0
		172	#endif
		173	#ifndef PROT_READ
		174	# define PROT_READ 0
		175	#endif
		176	#ifndef PROT_WRITE
		177	# define PROT_READ 0
		178	#endif
		179	#ifndef PROT_EXEC
		180	# define PROT_EXEC 0
		181	#endif
		182
		183	#ifndef ST_NODEV
		184	# define ST_NODEV 0
		185	#endif
		186	#ifndef ST_NOEXEC
		187	# define ST_NOEXEC 0
		188	#endif
		189	#ifndef ST_SYNCHRONOUS
		190	# define ST_SYNCHRONOUS 0
		191	#endif
		192	#ifndef ST_MANDLOCK
		193	# define ST_MANDLOCK 0
		194	#endif
		195	#ifndef ST_WRITE
		196	# define ST_WRITE 0
		197	#endif
		198	#ifndef ST_APPEND
		199	# define ST_APPEND 0
		200	#endif
		201	#ifndef ST_IMMUTABLE
		202	# define ST_IMMUTABLE 0
		203	#endif
		204	#ifndef ST_NOATIME
		205	# define ST_NOATIME 0
		206	#endif
		207	#ifndef ST_NODIRATIME
		208	# define ST_NODIRATIME 0
		209	#endif
		210	#ifndef ST_RELATIME
		211	# define ST_RELATIME 0
		212	#endif
		213
		214	#ifndef MCL_CURRENT
		215	# define MCL_CURRENT 0
		216	#endif
		217	#ifndef MCL_FUTURE
		218	# define MCL_FUTURE 0
		219	#endif
		220
		221	#ifndef MAP_ANONYMOUS
		222	# ifdef MAP_ANON
		223	# define MAP_ANONYMOUS MAP_ANON
31	# else	224	# else
32	# error sendfile support requested but not available	225	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	226	# endif
34	#endif	227	#endif
35		228	#ifndef MAP_HUGETLB
36	#if __ia64	229	# define MAP_HUGETLB 0
37	# define STACKSIZE 65536
38	#else
39	# define STACKSIZE 8192
40	#endif	230	#endif
		231	#ifndef MAP_LOCKED
		232	# define MAP_LOCKED 0
		233	#endif
		234	#ifndef MAP_NORESERVE
		235	# define MAP_NORESERVE 0
		236	#endif
		237	#ifndef MAP_POPULATE
		238	# define MAP_POPULATE 0
		239	#endif
		240	#ifndef MAP_NONBLOCK
		241	# define MAP_NONBLOCK 0
		242	#endif
		243
		244	#ifndef PAGESIZE
		245	# define PAGESIZE sysconf (_SC_PAGESIZE)
		246	#endif
		247
		248	static int req_invoke (eio_req *req);
		249	#define EIO_FINISH(req) req_invoke (req)
		250	static void req_destroy (eio_req *grp);
		251	#define EIO_DESTROY(req) req_destroy (req)
41		252
42	enum {	253	enum {
43	REQ_QUIT,	254	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
44	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,
50	REQ_READDIR,
51	REQ_SYMLINK,
52	};	255	};
53		256
54	typedef struct aio_cb {	257	#include "libeio/eio.c"
55	struct aio_cb *volatile next;
56		258
57	int type;
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;	259	typedef eio_req *aio_req;
		260	typedef eio_req *aio_req_ornot;
75		261
76	static int started, wanted;	262	static SV *on_next_submit;
77	static volatile int nreqs;	263	static int next_pri = EIO_PRI_DEFAULT;
78	static int max_outstanding = 1<<30;	264	static int max_outstanding;
79	static int respipe [2];
80		265
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	266	static s_epipe respipe;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		267
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	268	static void req_destroy (aio_req req);
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)	269	static void req_cancel (aio_req req);
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92		270
		271	static void want_poll (void)
		272	{
		273	/* write a dummy byte to the pipe so fh becomes ready */
		274	s_epipe_signal (&respipe);
		275	}
		276
		277	static void done_poll (void)
		278	{
		279	/* read any signals sent by the worker threads */
		280	s_epipe_drain (&respipe);
		281	}
		282
		283	/* must be called at most once */
		284	static SV *req_sv (aio_req req, HV *stash)
		285	{
93	if (req->fh)	286	if (!req->self)
94	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107
108	Safefree (req);
109	}
110
111	static void
112	poll_wait ()
113	{
114	if (nreqs && !ress)
115	{	287	{
116	fd_set rfd;	288	req->self = (SV *)newHV ();
117	FD_ZERO(&rfd);	289	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
118	FD_SET(respipe [0], &rfd);
119
120	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	290	}
122	}
123		291
124	static int	292	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
125	poll_cb ()	293	}
126	{
127	dSP;
128	int count = 0;
129	int do_croak = 0;
130	aio_req req;
131		294
132	for (;;)	295	static aio_req SvAIO_REQ (SV *sv)
		296	{
		297	MAGIC *mg;
		298
		299	if (!SvROK (sv)
		300	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		301	&& SvSTASH (SvRV (sv)) != aio_req_stash
		302	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		303	croak ("object of class IO::AIO::REQ expected");
		304
		305	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		306
		307	return mg ? (aio_req)mg->mg_ptr : 0;
		308	}
		309
		310	static void aio_grp_feed (aio_req grp)
		311	{
		312	if (grp->sv2 && SvOK (grp->sv2))
133	{	313	{
134	pthread_mutex_lock (&reslock);	314	dSP;
135	req = ress;
136		315
137	if (req)	316	ENTER;
		317	SAVETMPS;
		318	PUSHMARK (SP);
		319	XPUSHs (req_sv (grp, aio_grp_stash));
		320	PUTBACK;
		321	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		322	SPAGAIN;
		323	FREETMPS;
		324	LEAVE;
		325	}
		326	}
		327
		328	static void req_submit (eio_req *req)
		329	{
		330	eio_submit (req);
		331
		332	if (expect_false (on_next_submit))
		333	{
		334	dSP;
		335	SV *cb = sv_2mortal (on_next_submit);
		336
		337	on_next_submit = 0;
		338
		339	PUSHMARK (SP);
		340	PUTBACK;
		341	call_sv (cb, G_DISCARD | G_EVAL);
		342	}
		343	}
		344
		345	static int req_invoke (eio_req *req)
		346	{
		347	if (req->flags & FLAG_SV2_RO_OFF)
		348	SvREADONLY_off (req->sv2);
		349
		350	if (!EIO_CANCELLED (req) && req->callback)
		351	{
		352	dSP;
		353	static SV *sv_result_cache; /* caches the result integer SV */
		354	SV *sv_result;
		355
		356	ENTER;
		357	SAVETMPS;
		358	PUSHMARK (SP);
		359	EXTEND (SP, 1);
		360
		361	/* do not recreate the result IV from scratch each time */
		362	if (expect_true (sv_result_cache))
138	{	363	{
139	ress = req->next;	364	sv_result = sv_result_cache; sv_result_cache = 0;
140		365	SvIV_set (sv_result, req->result);
141	if (!ress)
142	{
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147
148	rese = 0;
149	}
150	}
151
152	pthread_mutex_unlock (&reslock);
153
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);
235	}
236	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}
243
244	free_req (req);
245	}
246
247	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{
372	ssize_t res;
373	off_t ooffset;
374
375	pthread_mutex_lock (&preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381
382	return res;
383	}
384
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390
391	pthread_mutex_lock (&preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397
398	return res;
399	}
400	#endif
401
402	#if !HAVE_FDATASYNC
403	# define fdatasync fsync
404	#endif
405
406	#if !HAVE_READAHEAD
407	# define readahead aio_readahead
408
409	static ssize_t
410	readahead (int fd, off_t offset, size_t count)
411	{
412	char readahead_buf[4096];
413
414	while (count > 0)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}
484
485	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# endif
505	#else
506	res = -1;
507	errno = ENOSYS;
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	while (count)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	count -= cnt;
545	}
546	}
547
548	return res;
549	}
550
551	/* read a full directory */
552	static int
553	scandir_ (const char *path, void **namesp)
554	{
555	DIR *dirp = opendir (path);
556	union
557	{
558	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;
561	struct dirent *entp;
562	char *name, *names;
563	int memlen = 4096;
564	int memofs = 0;
565	int res = 0;
566	int errorno;
567
568	if (!dirp)
569	return -1;
570
571	names = malloc (memlen);
572
573	for (;;)
574	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);
576
577	if (!entp)
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626
627	for (;;)
628	{
629	req = reqs;
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636
637	if (req)
638	break;
639
640	pthread_cond_wait (&reqwait, &reqlock);
641	}
642
643	pthread_mutex_unlock (&reqlock);
644
645	errno = 0; /* strictly unnecessary */
646
647	type = req->type;
648
649	switch (type)
650	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}	366	}
690	else	367	else
691	{	368	{
692	rese = ress = req;	369	sv_result = newSViv (req->result);
693		370	SvREADONLY_on (sv_result);
694	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);
696	}	371	}
697		372
698	pthread_mutex_unlock (&reslock);	373	switch (req->type)
		374	{
		375	case EIO_READDIR:
		376	{
		377	SV *rv = &PL_sv_undef;
		378
		379	if (req->result >= 0)
		380	{
		381	int i;
		382	char *names = (char *)req->ptr2;
		383	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		384	AV *av = newAV ();
		385
		386	av_extend (av, req->result - 1);
		387
		388	for (i = 0; i < req->result; ++i)
		389	{
		390	if (req->int1 & EIO_READDIR_DENTS)
		391	{
		392	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		393
		394	if (req->int1 & EIO_READDIR_CUSTOM2)
		395	{
		396	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		397	AV *avent = newAV ();
		398
		399	av_extend (avent, 2);
		400
		401	if (!sv_type [ent->type])
		402	{
		403	sv_type [ent->type] = newSViv (ent->type);
		404	SvREADONLY_on (sv_type [ent->type]);
		405	}
		406
		407	av_store (avent, 0, namesv);
		408	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		409	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		410
		411	av_store (av, i, newRV_noinc ((SV *)avent));
		412	}
		413	else
		414	av_store (av, i, namesv);
		415
		416	++ent;
		417	}
		418	else
		419	{
		420	SV *name = newSVpv (names, 0);
		421	av_store (av, i, name);
		422	names += SvCUR (name) + 1;
		423	}
		424	}
		425
		426	rv = sv_2mortal (newRV_noinc ((SV *)av));
		427	}
		428
		429	PUSHs (rv);
		430
		431	if (req->int1 & EIO_READDIR_CUSTOM1)
		432	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		433	}
		434	break;
		435
		436	case EIO_OPEN:
		437	{
		438	/* convert fd to fh */
		439	SV *fh = &PL_sv_undef;
		440
		441	if (req->result >= 0)
		442	{
		443	GV *gv = (GV *)sv_newmortal ();
		444	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		445	char sym [64];
		446	int symlen;
		447
		448	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		449	gv_init (gv, aio_stash, sym, symlen, 0);
		450
		451	symlen = snprintf (
		452	sym,
		453	sizeof (sym),
		454	"%s&=%d",
		455	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		456	(int)req->result
		457	);
		458
		459	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		460	fh = (SV *)gv;
		461	}
		462
		463	PUSHs (fh);
		464	}
		465	break;
		466
		467	case EIO_STATVFS:
		468	case EIO_FSTATVFS:
		469	{
		470	SV *rv = &PL_sv_undef;
		471
		472	if (req->result >= 0)
		473	{
		474	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		475	HV *hv = newHV ();
		476
		477	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		478
		479	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		480	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		481	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		482	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		483	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		484	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		485	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		486	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		487	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		488	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		489	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		490	}
		491
		492	PUSHs (rv);
		493	}
		494
		495	break;
		496
		497	case EIO_GROUP:
		498	req->int1 = 2; /* mark group as finished */
		499
		500	if (req->sv1)
		501	{
		502	int i;
		503	AV *av = (AV *)req->sv1;
		504
		505	EXTEND (SP, AvFILL (av) + 1);
		506	for (i = 0; i <= AvFILL (av); ++i)
		507	PUSHs (*av_fetch (av, i, 0));
		508	}
		509	break;
		510
		511	case EIO_NOP:
		512	case EIO_BUSY:
		513	break;
		514
		515	case EIO_READLINK:
		516	if (req->result > 0)
		517	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		518	break;
		519
		520	case EIO_STAT:
		521	case EIO_LSTAT:
		522	case EIO_FSTAT:
		523	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		524	PL_laststatval = req->result;
		525	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		526	PUSHs (sv_result);
		527	break;
		528
		529	case EIO_READ:
		530	{
		531	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		532	*SvEND (req->sv2) = 0;
		533	SvPOK_only (req->sv2);
		534	SvSETMAGIC (req->sv2);
		535	PUSHs (sv_result);
		536	}
		537	break;
		538
		539	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		540	if (req->result > 0)
		541	SvIV_set (sv_result, 0);
		542	/* FALLTHROUGH */
		543
		544	default:
		545	PUSHs (sv_result);
		546	break;
		547	}
		548
		549	errno = req->errorno;
		550
		551	PUTBACK;
		552	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		553	SPAGAIN;
		554
		555	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		556	SvREFCNT_dec (sv_result);
		557	else
		558	sv_result_cache = sv_result;
		559
		560	FREETMPS;
		561	LEAVE;
		562
		563	PUTBACK;
699	}	564	}
700	while (type != REQ_QUIT);	565
		566	return !!SvTRUE (ERRSV);
		567	}
		568
		569	static void req_destroy (aio_req req)
		570	{
		571	if (req->self)
		572	{
		573	sv_unmagic (req->self, PERL_MAGIC_ext);
		574	SvREFCNT_dec (req->self);
		575	}
		576
		577	SvREFCNT_dec (req->sv1);
		578	SvREFCNT_dec (req->sv2);
		579	SvREFCNT_dec (req->callback);
		580
		581	Safefree (req);
		582	}
		583
		584	static void req_cancel_subs (aio_req grp)
		585	{
		586	aio_req sub;
		587
		588	if (grp->type != EIO_GROUP)
		589	return;
		590
		591	SvREFCNT_dec (grp->sv2);
		592	grp->sv2 = 0;
		593
		594	eio_grp_cancel (grp);
		595	}
		596
		597	static void
		598	create_respipe (void)
		599	{
		600	if (s_epipe_renew (&respipe))
		601	croak ("IO::AIO: unable to initialize result pipe");
		602	}
		603
		604	static void poll_wait (void)
		605	{
		606	while (eio_nreqs ())
		607	{
		608	int size;
		609
		610	X_LOCK (reslock);
		611	size = res_queue.size;
		612	X_UNLOCK (reslock);
		613
		614	if (size)
		615	return;
		616
		617	etp_maybe_start_thread ();
		618
		619	s_epipe_wait (&respipe);
		620	}
		621	}
		622
		623	static int poll_cb (void)
		624	{
		625	for (;;)
		626	{
		627	int res = eio_poll ();
		628
		629	if (res > 0)
		630	croak (0);
		631
		632	if (!max_outstanding || max_outstanding > eio_nreqs ())
		633	return res;
		634
		635	poll_wait ();
		636	}
		637	}
		638
		639	static void atfork_child (void)
		640	{
		641	create_respipe ();
		642	}
		643
		644	/*****************************************************************************/
		645
		646	#if !_POSIX_MAPPED_FILES
		647	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		648	# define munmap(addr,length) (errno = ENOSYS, -1)
		649	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		650	#endif
		651
		652	#define MMAP_MAGIC PERL_MAGIC_ext
		653
		654	static int
		655	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		656	{
		657	int old_errno = errno;
		658	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		659	errno = old_errno;
		660
		661	mg->mg_obj = 0; /* just in case */
		662
		663	SvREADONLY_off (sv);
		664
		665	if (SvPVX (sv) != mg->mg_ptr)
		666	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		667
		668	SvCUR_set (sv, 0);
		669	SvPVX (sv) = 0;
		670	SvOK_off (sv);
701		671
702	return 0;	672	return 0;
703	}	673	}
704		674
		675	static MGVTBL mmap_vtbl = {
		676	0, 0, 0, 0, mmap_free
		677	};
		678
705	/*****************************************************************************/	679	/*****************************************************************************/
706		680
707	static void atfork_prepare (void)	681	static SV *
		682	get_cb (SV *cb_sv)
708	{	683	{
709	pthread_mutex_lock (&reqlock);	684	SvGETMAGIC (cb_sv);
710	pthread_mutex_lock (&reslock);	685	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
711	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);
713	#endif
714	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);
716	#endif
717	}
718
719	static void atfork_parent (void)
720	{
721	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);
723	#endif
724	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);
726	#endif
727	pthread_mutex_unlock (&reslock);
728	pthread_mutex_unlock (&reqlock);
729	}
730
731	static void atfork_child (void)
732	{
733	aio_req prv;
734
735	started = 0;
736
737	while (reqs)
738	{
739	prv = reqs;
740	reqs = prv->next;
741	free_req (prv);
742	}
743
744	reqs = reqe = 0;
745
746	while (ress)
747	{
748	prv = ress;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754
755	close (respipe [0]);
756	close (respipe [1]);
757	create_pipe ();
758
759	atfork_parent ();
760	}	686	}
761		687
762	#define dREQ \	688	#define dREQ \
		689	SV *cb_cv; \
763	aio_req req; \	690	aio_req req; \
		691	int req_pri = next_pri; \
		692	next_pri = EIO_PRI_DEFAULT; \
764	\	693	\
765	if (SvOK (callback) && !SvROK (callback)) \	694	cb_cv = get_cb (callback); \
766	croak ("clalback must be undef or of reference type"); \
767	\	695	\
768	Newz (0, req, 1, aio_cb); \	696	Newz (0, req, 1, eio_req); \
769	if (!req) \	697	if (!req) \
770	croak ("out of memory during aio_req allocation"); \	698	croak ("out of memory during eio_req allocation"); \
771	\	699	\
772	req->callback = newSVsv (callback);	700	req->callback = SvREFCNT_inc (cb_cv); \
773		701	req->pri = req_pri
		702
		703	#define REQ_SEND \
		704	PUTBACK; \
		705	req_submit (req); \
		706	SPAGAIN; \
		707	\
		708	if (GIMME_V != G_VOID) \
		709	XPUSHs (req_sv (req, aio_req_stash));
		710
774	MODULE = IO::AIO PACKAGE = IO::AIO	711	MODULE = IO::AIO PACKAGE = IO::AIO
775		712
776	PROTOTYPES: ENABLE	713	PROTOTYPES: ENABLE
777		714
778	BOOT:	715	BOOT:
779	{	716	{
		717	static const struct {
		718	const char *name;
		719	IV iv;
		720	} *civ, const_iv[] = {
		721	# define const_niv(name, value) { # name, (IV) value },
		722	# define const_iv(name) { # name, (IV) name },
		723	# define const_eio(name) { # name, (IV) EIO_ ## name },
		724	const_iv (EXDEV)
		725	const_iv (ENOSYS)
		726	const_iv (O_RDONLY)
		727	const_iv (O_WRONLY)
		728	const_iv (O_RDWR)
		729	const_iv (O_CREAT)
		730	const_iv (O_TRUNC)
		731	const_iv (O_EXCL)
		732	const_iv (O_APPEND)
		733	#ifndef _WIN32
		734	const_iv (S_IFIFO)
		735	#endif
		736	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		737	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		738	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		739	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		740	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		741	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		742
		743	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		744	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		745	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		746	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		747	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		748
		749	const_iv (ST_RDONLY)
		750	const_iv (ST_NOSUID)
		751	const_iv (ST_NODEV)
		752	const_iv (ST_NOEXEC)
		753	const_iv (ST_SYNCHRONOUS)
		754	const_iv (ST_MANDLOCK)
		755	const_iv (ST_WRITE)
		756	const_iv (ST_APPEND)
		757	const_iv (ST_IMMUTABLE)
		758	const_iv (ST_NOATIME)
		759	const_iv (ST_NODIRATIME)
		760	const_iv (ST_RELATIME)
		761
		762	const_iv (PROT_NONE)
		763	const_iv (PROT_EXEC)
		764	const_iv (PROT_READ)
		765	const_iv (PROT_WRITE)
		766
		767	/*const_iv (MAP_FIXED)*/
		768	const_iv (MAP_PRIVATE)
		769	const_iv (MAP_SHARED)
		770	const_iv (MAP_ANONYMOUS)
		771
		772	/* linuxish */
		773	const_iv (MAP_HUGETLB)
		774	const_iv (MAP_LOCKED)
		775	const_iv (MAP_NORESERVE)
		776	const_iv (MAP_POPULATE)
		777	const_iv (MAP_NONBLOCK)
		778
		779	const_iv (MCL_FUTURE)
		780	const_iv (MCL_CURRENT)
		781
		782	const_eio (MS_ASYNC)
		783	const_eio (MS_INVALIDATE)
		784	const_eio (MS_SYNC)
		785
		786	const_eio (MT_MODIFY)
		787
		788	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		789	const_eio (SYNC_FILE_RANGE_WRITE)
		790	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		791
		792	const_eio (READDIR_DENTS)
		793	const_eio (READDIR_DIRS_FIRST)
		794	const_eio (READDIR_STAT_ORDER)
		795	const_eio (READDIR_FOUND_UNKNOWN)
		796
		797	const_eio (DT_UNKNOWN)
		798	const_eio (DT_FIFO)
		799	const_eio (DT_CHR)
		800	const_eio (DT_DIR)
		801	const_eio (DT_BLK)
		802	const_eio (DT_REG)
		803	const_eio (DT_LNK)
		804	const_eio (DT_SOCK)
		805	const_eio (DT_WHT)
		806	};
		807
		808	aio_stash = gv_stashpv ("IO::AIO" , 1);
		809	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		810	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		811
		812	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		813	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		814
		815	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		816
780	create_pipe ();	817	create_respipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
782	}
783		818
		819	if (eio_init (want_poll, done_poll) < 0)
		820	croak ("IO::AIO: unable to initialise eio library");
		821
		822	/* atfork child called in fifo order, so before eio's handler */
		823	X_THREAD_ATFORK (0, 0, atfork_child);
		824	}
		825
784	void	826	void
785	min_parallel(nthreads)	827	max_poll_reqs (int nreqs)
786	int nthreads
787	PROTOTYPE: $	828	PROTOTYPE: $
		829	CODE:
		830	eio_set_max_poll_reqs (nreqs);
788		831
789	void	832	void
790	max_parallel(nthreads)	833	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	834	PROTOTYPE: $
793
794	int
795	max_outstanding(nreqs)
796	int nreqs
797	PROTOTYPE: $
798	CODE:	835	CODE:
799	RETVAL = max_outstanding;	836	eio_set_max_poll_time (nseconds);
		837
		838	void
		839	min_parallel (int nthreads)
		840	PROTOTYPE: $
		841	CODE:
		842	eio_set_min_parallel (nthreads);
		843
		844	void
		845	max_parallel (int nthreads)
		846	PROTOTYPE: $
		847	CODE:
		848	eio_set_max_parallel (nthreads);
		849
		850	void
		851	max_idle (int nthreads)
		852	PROTOTYPE: $
		853	CODE:
		854	eio_set_max_idle (nthreads);
		855
		856	void
		857	max_outstanding (int maxreqs)
		858	PROTOTYPE: $
		859	CODE:
800	max_outstanding = nreqs;	860	max_outstanding = maxreqs;
801		861
802	void	862	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	863	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
804	SV * pathname
805	int flags
806	int mode
807	SV * callback
808	PROTOTYPE: $$$;$	864	PROTOTYPE: $$$;$
809	CODE:	865	PPCODE:
810	{	866	{
811	dREQ;	867	dREQ;
812		868
813	req->type = REQ_OPEN;	869	req->type = EIO_OPEN;
814	req->data = newSVsv (pathname);	870	req->sv1 = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
816	req->fd = flags;	872	req->int1 = flags;
817	req->mode = mode;	873	req->int2 = mode;
818		874
819	send_req (req);	875	REQ_SEND;
820	}	876	}
821		877
822	void	878	void
823	aio_close(fh,callback=&PL_sv_undef)	879	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
824	SV * fh
825	SV * callback
826	PROTOTYPE: $;$	880	PROTOTYPE: $;$
827	ALIAS:	881	ALIAS:
828	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	882	aio_fsync = EIO_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	883	aio_fdatasync = EIO_FDATASYNC
831	CODE:	884	PPCODE:
832	{	885	{
		886	int fd = s_fileno_croak (fh, 0);
833	dREQ;	887	dREQ;
834		888
835	req->type = ix;	889	req->type = ix;
836	req->fh = newSVsv (fh);	890	req->sv1 = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	891	req->int1 = fd;
838		892
839	send_req (req);	893	REQ_SEND (req);
840	}	894	}
841		895
842	void	896	void
		897	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		898	PROTOTYPE: $$$$;$
		899	PPCODE:
		900	{
		901	int fd = s_fileno_croak (fh, 0);
		902	dREQ;
		903
		904	req->type = EIO_SYNC_FILE_RANGE;
		905	req->sv1 = newSVsv (fh);
		906	req->int1 = fd;
		907	req->offs = offset;
		908	req->size = nbytes;
		909	req->int2 = flags;
		910
		911	REQ_SEND (req);
		912	}
		913
		914	void
		915	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		916	PROTOTYPE: $;$
		917	PPCODE:
		918	{
		919	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		920	int fd = s_fileno_croak (fh, 0);
		921	dREQ;
		922
		923	if (close_pipe < 0)
		924	{
		925	int pipefd [2];
		926
		927	if (pipe (pipefd) < 0
		928	|| close (pipefd [1]) < 0
		929	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		930	abort (); /*D*/
		931
		932	close_pipe = pipefd [0];
		933	}
		934
		935	req->type = EIO_DUP2;
		936	req->int1 = close_pipe;
		937	req->sv2 = newSVsv (fh);
		938	req->int2 = fd;
		939
		940	REQ_SEND (req);
		941	}
		942
		943	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	944	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
844	SV * fh
845	UV offset
846	UV length
847	SV * data
848	UV dataoffset
849	SV * callback
850	ALIAS:	945	ALIAS:
851	aio_read = REQ_READ	946	aio_read = EIO_READ
852	aio_write = REQ_WRITE	947	aio_write = EIO_WRITE
853	PROTOTYPE: $$$$$;$	948	PROTOTYPE: $$$$$;$
854	CODE:	949	PPCODE:
855	{	950	{
856	aio_req req;
857	STRLEN svlen;	951	STRLEN svlen;
		952	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
858	char *svptr = SvPVbyte (data, svlen);	953	char *svptr = SvPVbyte (data, svlen);
859		954	UV len = SvUV (length);
860	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);
862		955
863	if (dataoffset < 0)	956	if (dataoffset < 0)
864	dataoffset += svlen;	957	dataoffset += svlen;
865		958
866	if (dataoffset < 0 || dataoffset > svlen)	959	if (dataoffset < 0 || dataoffset > svlen)
867	croak ("data offset outside of string");	960	croak ("dataoffset outside of data scalar");
868		961
869	if (ix == REQ_WRITE)	962	if (ix == EIO_WRITE)
870	{	963	{
871	/* write: check length and adjust. */	964	/* write: check length and adjust. */
872	if (length < 0 || length + dataoffset > svlen)	965	if (!SvOK (length) || len + dataoffset > svlen)
873	length = svlen - dataoffset;	966	len = svlen - dataoffset;
874	}	967	}
875	else	968	else
876	{	969	{
877	/* read: grow scalar as necessary */	970	/* read: check type and grow scalar as necessary */
		971	SvUPGRADE (data, SVt_PV);
878	svptr = SvGROW (data, length + dataoffset);	972	svptr = SvGROW (data, len + dataoffset + 1);
879	}	973	}
880
881	if (length < 0)
882	croak ("length must not be negative");
883		974
884	{	975	{
885	dREQ;	976	dREQ;
886		977
887	req->type = ix;	978	req->type = ix;
888	req->fh = newSVsv (fh);	979	req->sv1 = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	980	req->int1 = fd;
890	: IoOFP (sv_2io (fh)));	981	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
891	req->offset = offset;	982	req->size = len;
892	req->length = length;
893	req->data = SvREFCNT_inc (data);	983	req->sv2 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	984	req->ptr2 = (char *)svptr + dataoffset;
		985	req->stroffset = dataoffset;
895		986
896	if (!SvREADONLY (data))	987	if (!SvREADONLY (data))
897	{	988	{
898	SvREADONLY_on (data);	989	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	990	req->flags |= FLAG_SV2_RO_OFF;
900	}	991	}
901		992
902	send_req (req);	993	REQ_SEND;
903	}	994	}
904	}	995	}
905		996
906	void	997	void
		998	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		999	PROTOTYPE: $$;$
		1000	PPCODE:
		1001	{
		1002	SV *data;
		1003	dREQ;
		1004
		1005	req->type = EIO_READLINK;
		1006	req->sv1 = newSVsv (path);
		1007	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1008
		1009	REQ_SEND;
		1010	}
		1011
		1012	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1013	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
908	SV * out_fh
909	SV * in_fh
910	UV in_offset
911	UV length
912	SV * callback
913	PROTOTYPE: $$$$;$	1014	PROTOTYPE: $$$$;$
914	CODE:	1015	PPCODE:
915	{	1016	{
		1017	int ifd = s_fileno_croak (in_fh , 0);
		1018	int ofd = s_fileno_croak (out_fh, 1);
916	dREQ;	1019	dREQ;
917		1020
918	req->type = REQ_SENDFILE;	1021	req->type = EIO_SENDFILE;
919	req->fh = newSVsv (out_fh);	1022	req->sv1 = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1023	req->int1 = ofd;
921	req->fh2 = newSVsv (in_fh);	1024	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1025	req->int2 = ifd;
923	req->offset = in_offset;	1026	req->offs = in_offset;
924	req->length = length;	1027	req->size = length;
925		1028
926	send_req (req);	1029	REQ_SEND;
927	}	1030	}
928		1031
929	void	1032	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1033	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
931	SV * fh
932	UV offset
933	IV length
934	SV * callback
935	PROTOTYPE: $$$;$	1034	PROTOTYPE: $$$;$
936	CODE:	1035	PPCODE:
937	{	1036	{
		1037	int fd = s_fileno_croak (fh, 0);
938	dREQ;	1038	dREQ;
939		1039
940	req->type = REQ_READAHEAD;	1040	req->type = EIO_READAHEAD;
941	req->fh = newSVsv (fh);	1041	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1042	req->int1 = fd;
943	req->offset = offset;	1043	req->offs = offset;
944	req->length = length;	1044	req->size = length;
945		1045
946	send_req (req);	1046	REQ_SEND;
947	}	1047	}
948		1048
949	void	1049	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1050	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
951	SV * fh_or_path
952	SV * callback
953	ALIAS:	1051	ALIAS:
954	aio_stat = REQ_STAT	1052	aio_stat = EIO_STAT
955	aio_lstat = REQ_LSTAT	1053	aio_lstat = EIO_LSTAT
		1054	aio_statvfs = EIO_STATVFS
956	CODE:	1055	PPCODE:
957	{	1056	{
958	dREQ;	1057	dREQ;
959		1058
960	New (0, req->statdata, 1, Stat_t);	1059	req->sv1 = newSVsv (fh_or_path);
961	if (!req->statdata)
962	{
963	free_req (req);
964	croak ("out of memory during aio_req->statdata allocation");
965	}
966		1060
967	if (SvPOK (fh_or_path))	1061	if (SvPOK (req->sv1))
968	{	1062	{
969	req->type = ix;	1063	req->type = ix;
970	req->data = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);	1064	req->ptr1 = SvPVbyte_nolen (req->sv1);
972	}	1065	}
973	else	1066	else
974	{	1067	{
975	req->type = REQ_FSTAT;	1068	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
976	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1069	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}	1070	}
979		1071
980	send_req (req);	1072	REQ_SEND;
981	}	1073	}
982		1074
983	void	1075	void
		1076	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1082	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1083	req->sv1 = newSVsv (fh_or_path);
		1084
		1085	if (SvPOK (req->sv1))
		1086	{
		1087	req->type = EIO_UTIME;
		1088	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1089	}
		1090	else
		1091	{
		1092	req->type = EIO_FUTIME;
		1093	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1094	}
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	void
		1100	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1101	PPCODE:
		1102	{
		1103	dREQ;
		1104
		1105	req->sv1 = newSVsv (fh_or_path);
		1106	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1107
		1108	if (SvPOK (req->sv1))
		1109	{
		1110	req->type = EIO_TRUNCATE;
		1111	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1112	}
		1113	else
		1114	{
		1115	req->type = EIO_FTRUNCATE;
		1116	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1117	}
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1124	ALIAS:
		1125	aio_chmod = EIO_CHMOD
		1126	aio_mkdir = EIO_MKDIR
		1127	PPCODE:
		1128	{
		1129	dREQ;
		1130
		1131	req->int2 = mode;
		1132	req->sv1 = newSVsv (fh_or_path);
		1133
		1134	if (SvPOK (req->sv1))
		1135	{
		1136	req->type = ix;
		1137	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1138	}
		1139	else
		1140	{
		1141	req->type = EIO_FCHMOD;
		1142	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1143	}
		1144
		1145	REQ_SEND;
		1146	}
		1147
		1148	void
		1149	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1150	PPCODE:
		1151	{
		1152	dREQ;
		1153
		1154	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1155	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1156	req->sv1 = newSVsv (fh_or_path);
		1157
		1158	if (SvPOK (req->sv1))
		1159	{
		1160	req->type = EIO_CHOWN;
		1161	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1162	}
		1163	else
		1164	{
		1165	req->type = EIO_FCHOWN;
		1166	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1167	}
		1168
		1169	REQ_SEND;
		1170	}
		1171
		1172	void
		1173	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1174	PPCODE:
		1175	{
		1176	dREQ;
		1177
		1178	req->type = EIO_READDIR;
		1179	req->sv1 = newSVsv (pathname);
		1180	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1181	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1182
		1183	if (flags & EIO_READDIR_DENTS)
		1184	req->int1 |= EIO_READDIR_CUSTOM2;
		1185
		1186	REQ_SEND;
		1187	}
		1188
		1189	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1190	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
985	SV * pathname
986	SV * callback
987	ALIAS:	1191	ALIAS:
988	aio_unlink = REQ_UNLINK	1192	aio_unlink = EIO_UNLINK
989	aio_rmdir = REQ_RMDIR	1193	aio_rmdir = EIO_RMDIR
		1194	aio_readdir = EIO_READDIR
990	CODE:	1195	PPCODE:
991	{	1196	{
992	dREQ;	1197	dREQ;
993		1198
994	req->type = ix;	1199	req->type = ix;
995	req->data = newSVsv (pathname);	1200	req->sv1 = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	1201	req->ptr1 = SvPVbyte_nolen (req->sv1);
997
998	send_req (req);
999	}
1000		1202
		1203	REQ_SEND;
		1204	}
		1205
1001	void	1206	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1207	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1003	SV * oldpath	1208	ALIAS:
1004	SV * newpath	1209	aio_link = EIO_LINK
1005	SV * callback	1210	aio_symlink = EIO_SYMLINK
		1211	aio_rename = EIO_RENAME
1006	CODE:	1212	PPCODE:
1007	{	1213	{
1008	dREQ;	1214	dREQ;
1009		1215
1010	req->type = REQ_SYMLINK;	1216	req->type = ix;
1011	req->fh = newSVsv (oldpath);	1217	req->sv1 = newSVsv (oldpath);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1218	req->ptr1 = SvPVbyte_nolen (req->sv1);
1013	req->data = newSVsv (newpath);	1219	req->sv2 = newSVsv (newpath);
1014	req->dataptr = SvPVbyte_nolen (req->data);	1220	req->ptr2 = SvPVbyte_nolen (req->sv2);
1015		1221
1016	send_req (req);	1222	REQ_SEND;
1017	}	1223	}
1018		1224
1019	void	1225	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1226	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1021	SV * pathname
1022	SV * callback
1023	CODE:	1227	PPCODE:
1024	{	1228	{
1025	dREQ;	1229	dREQ;
1026		1230
1027	req->type = REQ_READDIR;	1231	req->type = EIO_MKNOD;
1028	req->data = newSVsv (pathname);	1232	req->sv1 = newSVsv (pathname);
1029	req->dataptr = SvPVbyte_nolen (req->data);	1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1234	req->int2 = (mode_t)mode;
		1235	req->offs = dev;
1030		1236
1031	send_req (req);	1237	REQ_SEND;
1032	}	1238	}
1033		1239
1034	void	1240	void
		1241	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1242	ALIAS:
		1243	aio_mtouch = EIO_MTOUCH
		1244	aio_msync = EIO_MSYNC
		1245	PROTOTYPE: $$$$;$
		1246	PPCODE:
		1247	{
		1248	STRLEN svlen;
		1249	UV len = SvUV (length);
		1250	char *svptr = SvPVbyte (data, svlen);
		1251
		1252	if (offset < 0)
		1253	offset += svlen;
		1254
		1255	if (offset < 0 || offset > svlen)
		1256	croak ("offset outside of scalar");
		1257
		1258	if (!SvOK (length) || len + offset > svlen)
		1259	len = svlen - offset;
		1260
		1261	{
		1262	dREQ;
		1263
		1264	req->type = ix;
		1265	req->size = len;
		1266	req->sv2 = SvREFCNT_inc (data);
		1267	req->ptr2 = (char *)svptr + offset;
		1268	req->int1 = flags;
		1269
		1270	REQ_SEND;
		1271	}
		1272	}
		1273
		1274	void
		1275	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1276	PPCODE:
		1277	{
		1278	dREQ;
		1279
		1280	req->type = EIO_BUSY;
		1281	req->nv1 = delay < 0. ? 0. : delay;
		1282
		1283	REQ_SEND;
		1284	}
		1285
		1286	void
		1287	aio_group (SV *callback=&PL_sv_undef)
		1288	PROTOTYPE: ;$
		1289	PPCODE:
		1290	{
		1291	dREQ;
		1292
		1293	req->type = EIO_GROUP;
		1294
		1295	req_submit (req);
		1296	XPUSHs (req_sv (req, aio_grp_stash));
		1297	}
		1298
		1299	void
		1300	aio_nop (SV *callback=&PL_sv_undef)
		1301	ALIAS:
		1302	aio_nop = EIO_NOP
		1303	aio_sync = EIO_SYNC
		1304	PPCODE:
		1305	{
		1306	dREQ;
		1307
		1308	req->type = ix;
		1309
		1310	REQ_SEND;
		1311	}
		1312
		1313	int
		1314	aioreq_pri (int pri = 0)
		1315	PROTOTYPE: ;$
		1316	CODE:
		1317	RETVAL = next_pri;
		1318	if (items > 0)
		1319	{
		1320	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1321	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1322	next_pri = pri;
		1323	}
		1324	OUTPUT:
		1325	RETVAL
		1326
		1327	void
		1328	aioreq_nice (int nice = 0)
		1329	CODE:
		1330	nice = next_pri - nice;
		1331	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1332	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1333	next_pri = nice;
		1334
		1335	void
1035	flush()	1336	flush ()
1036	PROTOTYPE:	1337	PROTOTYPE:
1037	CODE:	1338	CODE:
1038	while (nreqs)	1339	while (eio_nreqs ())
1039	{	1340	{
1040	poll_wait ();	1341	poll_wait ();
1041	poll_cb ();	1342	poll_cb ();
1042	}	1343	}
1043		1344
1044	void	1345	int
1045	poll()	1346	poll()
1046	PROTOTYPE:	1347	PROTOTYPE:
1047	CODE:	1348	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1349	poll_wait ();
1051	poll_cb ();	1350	RETVAL = poll_cb ();
1052	}	1351	OUTPUT:
		1352	RETVAL
1053		1353
1054	int	1354	int
1055	poll_fileno()	1355	poll_fileno()
1056	PROTOTYPE:	1356	PROTOTYPE:
1057	CODE:	1357	CODE:
1058	RETVAL = respipe [0];	1358	RETVAL = s_epipe_fd (&respipe);
1059	OUTPUT:	1359	OUTPUT:
1060	RETVAL	1360	RETVAL
1061		1361
1062	int	1362	int
1063	poll_cb(...)	1363	poll_cb(...)
…		…
1069		1369
1070	void	1370	void
1071	poll_wait()	1371	poll_wait()
1072	PROTOTYPE:	1372	PROTOTYPE:
1073	CODE:	1373	CODE:
1074	if (nreqs)
1075	poll_wait ();	1374	poll_wait ();
1076		1375
1077	int	1376	int
1078	nreqs()	1377	nreqs()
1079	PROTOTYPE:	1378	PROTOTYPE:
1080	CODE:	1379	CODE:
1081	RETVAL = nreqs;	1380	RETVAL = eio_nreqs ();
1082	OUTPUT:	1381	OUTPUT:
1083	RETVAL	1382	RETVAL
1084		1383
		1384	int
		1385	nready()
		1386	PROTOTYPE:
		1387	CODE:
		1388	RETVAL = eio_nready ();
		1389	OUTPUT:
		1390	RETVAL
		1391
		1392	int
		1393	npending()
		1394	PROTOTYPE:
		1395	CODE:
		1396	RETVAL = eio_npending ();
		1397	OUTPUT:
		1398	RETVAL
		1399
		1400	int
		1401	nthreads()
		1402	PROTOTYPE:
		1403	CODE:
		1404	RETVAL = eio_nthreads ();
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1410	PROTOTYPE: $$$$
		1411	CODE:
		1412	RETVAL = posix_fadvise (fh, offset, length, advice);
		1413	OUTPUT:
		1414	RETVAL
		1415
		1416	ssize_t
		1417	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1418	PROTOTYPE: $$$$
		1419	CODE:
		1420	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void
		1425	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1426	PROTOTYPE: $$$$$;$
		1427	PPCODE:
		1428	sv_unmagic (scalar, MMAP_MAGIC);
		1429	{
		1430	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1431	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1432	if (addr == (void *)-1)
		1433	XSRETURN_NO;
		1434
		1435	sv_force_normal (scalar);
		1436
		1437	/* we store the length in mg_obj, as namlen is I32 :/ */
		1438	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1439	->mg_obj = (SV *)length;
		1440
		1441	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1442
		1443	if (!(prot & PROT_WRITE))
		1444	SvREADONLY_on (scalar);
		1445
		1446	if (SvLEN (scalar))
		1447	Safefree (SvPVX (scalar));
		1448
		1449	SvPVX (scalar) = (char *)addr;
		1450	SvCUR_set (scalar, length);
		1451	SvLEN_set (scalar, 0);
		1452	SvPOK_only (scalar);
		1453
		1454	XSRETURN_YES;
		1455	}
		1456
		1457	void
		1458	munmap (SV *scalar)
		1459	PROTOTYPE: $
		1460	CODE:
		1461	sv_unmagic (scalar, MMAP_MAGIC);
		1462
		1463	int
		1464	madvise (SV *scalar, off_t offset, off_t length, IV advice_or_prot)
		1465	ALIAS:
		1466	mprotect = 1
		1467	PROTOTYPE: $$$$
		1468	CODE:
		1469	{
		1470	STRLEN cur;
		1471	char *addr = SvPVbyte (scalar, cur);
		1472
		1473	if (offset > cur)
		1474	RETVAL = errno = EFAULT;
		1475	else
		1476	{
		1477	if (!SvOK (ST (2)))
		1478	length = cur - offset;
		1479
		1480	if (offset + length > cur)
		1481	RETVAL = errno = EFAULT;
		1482	else
		1483	switch (ix)
		1484	{
		1485	case 0: RETVAL = posix_madvise (addr + offset, length, advice_or_prot); break;
		1486	case 1: RETVAL = mprotect (addr + offset, length, advice_or_prot); break;
		1487	}
		1488	}
		1489	}
		1490	OUTPUT:
		1491	RETVAL
		1492
		1493	int
		1494	mlockall (int flags)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	#if _POSIX_MEMLOCK
		1498	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1499	extern int mallopt (int, int);
		1500	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1501	#endif
		1502	mlockall (flags);
		1503	#else
		1504	RETVAL = -1;
		1505	errno = ENOSYS;
		1506	#endif
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	munlockall ()
		1512	PROTOTYPE:
		1513	CODE:
		1514	#if _POSIX_MEMLOCK
		1515	munlockall ();
		1516	#else
		1517	RETVAL = -1;
		1518	errno = ENOSYS;
		1519	#endif
		1520	OUTPUT:
		1521	RETVAL
		1522
		1523	void _on_next_submit (SV *cb)
		1524	CODE:
		1525	SvREFCNT_dec (on_next_submit);
		1526	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1527
		1528	PROTOTYPES: DISABLE
		1529
		1530	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1531
		1532	void
		1533	cancel (aio_req_ornot req)
		1534	CODE:
		1535	eio_cancel (req);
		1536
		1537	void
		1538	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1539	PPCODE:
		1540	{
		1541	if (GIMME_V != G_VOID)
		1542	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1543
		1544	if (items > 1)
		1545	{
		1546	SV *cb_cv =get_cb (callback);
		1547
		1548	SvREFCNT_dec (req->callback);
		1549	req->callback = SvREFCNT_inc (cb_cv);
		1550	}
		1551	}
		1552
		1553	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1554
		1555	void
		1556	add (aio_req grp, ...)
		1557	PPCODE:
		1558	{
		1559	int i;
		1560
		1561	if (grp->int1 == 2)
		1562	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1563
		1564	for (i = 1; i < items; ++i )
		1565	{
		1566	aio_req req;
		1567
		1568	if (GIMME_V != G_VOID)
		1569	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1570
		1571	req = SvAIO_REQ (ST (i));
		1572
		1573	if (req)
		1574	eio_grp_add (grp, req);
		1575	}
		1576	}
		1577
		1578	void
		1579	cancel_subs (aio_req_ornot req)
		1580	CODE:
		1581	req_cancel_subs (req);
		1582
		1583	void
		1584	result (aio_req grp, ...)
		1585	CODE:
		1586	{
		1587	int i;
		1588	AV *av;
		1589
		1590	grp->errorno = errno;
		1591
		1592	av = newAV ();
		1593	av_extend (av, items - 1);
		1594
		1595	for (i = 1; i < items; ++i )
		1596	av_push (av, newSVsv (ST (i)));
		1597
		1598	SvREFCNT_dec (grp->sv1);
		1599	grp->sv1 = (SV *)av;
		1600	}
		1601
		1602	void
		1603	errno (aio_req grp, int errorno = errno)
		1604	CODE:
		1605	grp->errorno = errorno;
		1606
		1607	void
		1608	limit (aio_req grp, int limit)
		1609	CODE:
		1610	eio_grp_limit (grp, limit);
		1611
		1612	void
		1613	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1614	CODE:
		1615	{
		1616	SvREFCNT_dec (grp->sv2);
		1617	grp->sv2 = newSVsv (callback);
		1618	grp->feed = aio_grp_feed;
		1619
		1620	if (grp->int2 <= 0)
		1621	grp->int2 = 2;
		1622
		1623	eio_grp_limit (grp, grp->int2);
		1624	}
		1625

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