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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.201 by root, Thu Sep 29 09:57:12 2011 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 <limits.h>	16	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	17	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	18	#include <sched.h>
21		19
22	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
23	# if __linux
24	# include <sys/sendfile.h>
25	# elif __freebsd
26	# include <sys/socket.h>
27	# include <sys/uio.h>	21	# include <sys/mman.h>
28	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#else
		68
29	# include <sys/socket.h>	69	#include <sys/time.h>
30	# elif __solaris /* not yet */
31	# include <sys/sendfile.h>	70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
32	# else	295	# else
33	# error sendfile support requested but not available	296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	297	# endif
35	#endif	298	#endif
36		299	#ifndef MAP_HUGETLB
37	/* used for struct dirent, AIX doesn't provide it */	300	# define MAP_HUGETLB 0
38	#ifndef NAME_MAX
39	# define NAME_MAX 4096
40	#endif	301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
		304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
41		314
42	#if __ia64	315	#ifndef makedev
43	# define STACKSIZE 65536	316	# define makedev(maj,min) (((maj) << 8) | (min))
44	#else	317	#endif
45	# define STACKSIZE 8192	318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
		324
		325	#ifndef PAGESIZE
		326	# define PAGESIZE sysconf (_SC_PAGESIZE)
46	#endif	327	#endif
47		328
48	enum {	329	enum {
49	REQ_QUIT,	330	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	};	331	};
59		332
60	typedef struct aio_cb {
61	struct aio_cb *volatile next;
62
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;	333	typedef eio_req *aio_req;
		334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd aio_wd;
81		336
82	static int started, wanted;	337	static SV *on_next_submit;
83	static volatile int nreqs;	338	static int next_pri = EIO_PRI_DEFAULT;
84	static int max_outstanding = 1<<30;	339	static int max_outstanding;
85	static int respipe [2];
86		340
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	341	static s_epipe respipe;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		342
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	343	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)	344	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98
99	if (req->fh)
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		345
117	static void	346	static void
118	poll_wait ()	347	want_poll (void)
119	{	348	{
120	if (nreqs && !ress)	349	/* write a dummy byte to the pipe so fh becomes ready */
		350	s_epipe_signal (&respipe);
		351	}
		352
		353	static void
		354	done_poll (void)
		355	{
		356	/* read any signals sent by the worker threads */
		357	s_epipe_drain (&respipe);
		358	}
		359
		360	/* must be called at most once */
		361	static SV *
		362	req_sv (aio_req req, HV *stash)
		363	{
		364	if (!req->self)
121	{	365	{
122	fd_set rfd;	366	req->self = (SV *)newHV ();
123	FD_ZERO(&rfd);	367	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	}	368	}
		369
		370	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		371	}
		372
		373	static SV *
		374	newSVaio_wd (aio_wd wd)
		375	{
		376	return sv_bless (newRV_noinc (newSViv ((long)wd)), aio_wd_stash);
		377	}
		378
		379	static aio_req
		380	SvAIO_REQ (SV *sv)
		381	{
		382	MAGIC *mg;
		383
		384	if (!SvROK (sv)
		385	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		386	&& SvSTASH (SvRV (sv)) != aio_req_stash
		387	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		388	croak ("object of class IO::AIO::REQ expected");
		389
		390	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		391
		392	return mg ? (aio_req)mg->mg_ptr : 0;
		393	}
		394
		395	static aio_wd
		396	SvAIO_WD (SV *sv)
		397	{
		398	if (!SvROK (sv)
		399	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		400	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		401	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		402
		403	return (aio_wd)(long)SvIVX (SvRV (sv));
		404	}
		405
		406	static void
		407	aio_grp_feed (aio_req grp)
		408	{
		409	if (grp->sv2 && SvOK (grp->sv2))
		410	{
		411	dSP;
		412
		413	ENTER;
		414	SAVETMPS;
		415	PUSHMARK (SP);
		416	XPUSHs (req_sv (grp, aio_grp_stash));
		417	PUTBACK;
		418	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		419	SPAGAIN;
		420	FREETMPS;
		421	LEAVE;
		422	}
		423	}
		424
		425	static void
		426	req_submit (eio_req *req)
		427	{
		428	eio_submit (req);
		429
		430	if (expect_false (on_next_submit))
		431	{
		432	dSP;
		433	SV *cb = sv_2mortal (on_next_submit);
		434
		435	on_next_submit = 0;
		436
		437	PUSHMARK (SP);
		438	PUTBACK;
		439	call_sv (cb, G_DISCARD | G_EVAL);
		440	}
128	}	441	}
129		442
130	static int	443	static int
131	poll_cb ()	444	req_invoke (eio_req *req)
132	{	445	{
133	dSP;	446	if (req->flags & FLAG_SV2_RO_OFF)
134	int count = 0;	447	SvREADONLY_off (req->sv2);
135	int do_croak = 0;
136	aio_req req;
137		448
138	for (;;)	449	if (!EIO_CANCELLED (req) && req->callback)
139	{	450	{
140	pthread_mutex_lock (&reslock);	451	dSP;
141	req = ress;	452	static SV *sv_result_cache; /* caches the result integer SV */
		453	SV *sv_result;
142		454
143	if (req)	455	ENTER;
		456	SAVETMPS;
		457	PUSHMARK (SP);
		458	EXTEND (SP, 1);
		459
		460	/* do not recreate the result IV from scratch each time */
		461	if (expect_true (sv_result_cache))
144	{	462	{
145	ress = req->next;	463	sv_result = sv_result_cache; sv_result_cache = 0;
146		464	SvIV_set (sv_result, req->result);
147	if (!ress)	465	SvIOK_only (sv_result);
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	}	466	}
698	else	467	else
699	{	468	{
700	rese = ress = req;	469	sv_result = newSViv (req->result);
701		470	SvREADONLY_on (sv_result);
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}	471	}
705		472
706	pthread_mutex_unlock (&reslock);	473	switch (req->type)
		474	{
		475	case EIO_WD_OPEN:
		476	PUSHs (sv_2mortal (newSVaio_wd (req->wd)));
		477	break;
		478
		479	case EIO_READDIR:
		480	{
		481	SV *rv = &PL_sv_undef;
		482
		483	if (req->result >= 0)
		484	{
		485	int i;
		486	char *names = (char *)req->ptr2;
		487	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		488	AV *av = newAV ();
		489
		490	av_extend (av, req->result - 1);
		491
		492	for (i = 0; i < req->result; ++i)
		493	{
		494	if (req->int1 & EIO_READDIR_DENTS)
		495	{
		496	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		497
		498	if (req->int1 & EIO_READDIR_CUSTOM2)
		499	{
		500	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		501	AV *avent = newAV ();
		502
		503	av_extend (avent, 2);
		504
		505	if (!sv_type [ent->type])
		506	{
		507	sv_type [ent->type] = newSViv (ent->type);
		508	SvREADONLY_on (sv_type [ent->type]);
		509	}
		510
		511	av_store (avent, 0, namesv);
		512	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		513	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		514
		515	av_store (av, i, newRV_noinc ((SV *)avent));
		516	}
		517	else
		518	av_store (av, i, namesv);
		519
		520	++ent;
		521	}
		522	else
		523	{
		524	SV *name = newSVpv (names, 0);
		525	av_store (av, i, name);
		526	names += SvCUR (name) + 1;
		527	}
		528	}
		529
		530	rv = sv_2mortal (newRV_noinc ((SV *)av));
		531	}
		532
		533	PUSHs (rv);
		534
		535	if (req->int1 & EIO_READDIR_CUSTOM1)
		536	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		537	}
		538	break;
		539
		540	case EIO_OPEN:
		541	{
		542	/* convert fd to fh */
		543	SV *fh = &PL_sv_undef;
		544
		545	if (req->result >= 0)
		546	{
		547	GV *gv = (GV *)sv_newmortal ();
		548	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		549	char sym [64];
		550	int symlen;
		551
		552	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		553	gv_init (gv, aio_stash, sym, symlen, 0);
		554
		555	symlen = snprintf (
		556	sym,
		557	sizeof (sym),
		558	"%s&=%d",
		559	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		560	(int)req->result
		561	);
		562
		563	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		564	fh = (SV *)gv;
		565	}
		566
		567	PUSHs (fh);
		568	}
		569	break;
		570
		571	case EIO_STATVFS:
		572	case EIO_FSTATVFS:
		573	{
		574	SV *rv = &PL_sv_undef;
		575
		576	#ifndef _WIN32
		577	if (req->result >= 0)
		578	{
		579	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		580	HV *hv = newHV ();
		581
		582	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		583
		584	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		585	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		586	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		587	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		588	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		589	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		590	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		591	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		592	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		593	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		594	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		595	}
		596	#endif
		597
		598	PUSHs (rv);
		599	}
		600
		601	break;
		602
		603	case EIO_GROUP:
		604	req->int1 = 2; /* mark group as finished */
		605
		606	if (req->sv1)
		607	{
		608	int i;
		609	AV *av = (AV *)req->sv1;
		610
		611	EXTEND (SP, AvFILL (av) + 1);
		612	for (i = 0; i <= AvFILL (av); ++i)
		613	PUSHs (*av_fetch (av, i, 0));
		614	}
		615	break;
		616
		617	case EIO_NOP:
		618	case EIO_BUSY:
		619	break;
		620
		621	case EIO_READLINK:
		622	case EIO_REALPATH:
		623	if (req->result > 0)
		624	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		625	break;
		626
		627	case EIO_STAT:
		628	case EIO_LSTAT:
		629	case EIO_FSTAT:
		630	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		631
		632	if (!(PL_laststatval = req->result))
		633	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		634	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		635
		636	PUSHs (sv_result);
		637	break;
		638
		639	case EIO_READ:
		640	{
		641	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		642	*SvEND (req->sv2) = 0;
		643	SvPOK_only (req->sv2);
		644	SvSETMAGIC (req->sv2);
		645	PUSHs (sv_result);
		646	}
		647	break;
		648
		649	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		650	if (req->result > 0)
		651	SvIV_set (sv_result, 0);
		652	/* FALLTHROUGH */
		653
		654	default:
		655	PUSHs (sv_result);
		656	break;
		657	}
		658
		659	errno = req->errorno;
		660
		661	PUTBACK;
		662	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		663	SPAGAIN;
		664
		665	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		666	SvREFCNT_dec (sv_result);
		667	else
		668	sv_result_cache = sv_result;
		669
		670	FREETMPS;
		671	LEAVE;
		672
		673	PUTBACK;
707	}	674	}
708	while (type != REQ_QUIT);	675
		676	return !!SvTRUE (ERRSV);
		677	}
		678
		679	static void
		680	req_destroy (aio_req req)
		681	{
		682	if (req->self)
		683	{
		684	sv_unmagic (req->self, PERL_MAGIC_ext);
		685	SvREFCNT_dec (req->self);
		686	}
		687
		688	SvREFCNT_dec (req->sv1);
		689	SvREFCNT_dec (req->sv2);
		690	SvREFCNT_dec (req->sv3);
		691	SvREFCNT_dec (req->sv4);
		692	SvREFCNT_dec (req->callback);
		693
		694	Safefree (req);
		695	}
		696
		697	static void
		698	req_cancel_subs (aio_req grp)
		699	{
		700	if (grp->type != EIO_GROUP)
		701	return;
		702
		703	SvREFCNT_dec (grp->sv2);
		704	grp->sv2 = 0;
		705
		706	eio_grp_cancel (grp);
		707	}
		708
		709	static void ecb_cold
		710	create_respipe (void)
		711	{
		712	if (s_epipe_renew (&respipe))
		713	croak ("IO::AIO: unable to initialize result pipe");
		714	}
		715
		716	static void
		717	poll_wait (void)
		718	{
		719	while (eio_nreqs ())
		720	{
		721	int size;
		722
		723	X_LOCK (reslock);
		724	size = res_queue.size;
		725	X_UNLOCK (reslock);
		726
		727	if (size)
		728	return;
		729
		730	etp_maybe_start_thread ();
		731
		732	s_epipe_wait (&respipe);
		733	}
		734	}
		735
		736	static int
		737	poll_cb (void)
		738	{
		739	for (;;)
		740	{
		741	int res = eio_poll ();
		742
		743	if (res > 0)
		744	croak (0);
		745
		746	if (!max_outstanding || max_outstanding > eio_nreqs ())
		747	return res;
		748
		749	poll_wait ();
		750	}
		751	}
		752
		753	static void ecb_cold
		754	reinit (void)
		755	{
		756	create_respipe ();
		757
		758	if (eio_init (want_poll, done_poll) < 0)
		759	croak ("IO::AIO: unable to initialise eio library");
		760	}
		761
		762	/*****************************************************************************/
		763
		764	#if !_POSIX_MAPPED_FILES
		765	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		766	# define munmap(addr,length) (errno = ENOSYS, -1)
		767	#endif
		768
		769	#if !_POSIX_MEMORY_PROTECTION
		770	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		771	# define PROT_NONE 0
		772	# define PROT_WRITE 0
		773	# define MAP_PRIVATE 0
		774	# define MAP_SHARED 0
		775	# define MAP_FIXED 0
		776	#endif
		777
		778	#define MMAP_MAGIC PERL_MAGIC_ext
		779
		780	static int ecb_cold
		781	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		782	{
		783	int old_errno = errno;
		784	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		785	errno = old_errno;
		786
		787	mg->mg_obj = 0; /* just in case */
		788
		789	SvREADONLY_off (sv);
		790
		791	if (SvPVX (sv) != mg->mg_ptr)
		792	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		793
		794	SvCUR_set (sv, 0);
		795	SvPVX (sv) = 0;
		796	SvOK_off (sv);
709		797
710	return 0;	798	return 0;
711	}	799	}
712		800
		801	static MGVTBL mmap_vtbl = {
		802	0, 0, 0, 0, mmap_free
		803	};
		804
713	/*****************************************************************************/	805	/*****************************************************************************/
714		806
715	static void atfork_prepare (void)	807	static SV *
		808	get_cb (SV *cb_sv)
716	{	809	{
717	pthread_mutex_lock (&reqlock);	810	SvGETMAGIC (cb_sv);
718	pthread_mutex_lock (&reslock);	811	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	}	812	}
726		813
727	static void atfork_parent (void)	814	#define dREQ \
728	{	815	SV *cb_cv; \
729	#if !HAVE_READDIR_R	816	aio_req req; \
730	pthread_mutex_unlock (&readdirlock);	817	int req_pri = next_pri; \
731	#endif	818	next_pri = EIO_PRI_DEFAULT; \
732	#if !HAVE_PREADWRITE	819	\
733	pthread_mutex_unlock (&preadwritelock);	820	cb_cv = get_cb (callback); \
734	#endif	821	\
735	pthread_mutex_unlock (&reslock);	822	Newz (0, req, 1, eio_req); \
736	pthread_mutex_unlock (&reqlock);	823	if (!req) \
737	}	824	croak ("out of memory during eio_req allocation"); \
		825	\
		826	req->callback = SvREFCNT_inc (cb_cv); \
		827	req->pri = req_pri
738		828
739	static void atfork_child (void)	829	#define REQ_SEND \
740	{	830	PUTBACK; \
741	aio_req prv;	831	req_submit (req); \
		832	SPAGAIN; \
		833	\
		834	if (GIMME_V != G_VOID) \
		835	XPUSHs (req_sv (req, aio_req_stash));
742		836
743	started = 0;	837	ecb_inline void
744		838	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
745	while (reqs)	839	{
		840	if (expect_false (SvROK (path)))
746	{	841	{
747	prv = reqs;	842	AV *av = (AV *)SvRV (path);
748	reqs = prv->next;	843	SV *wdob;
749	free_req (prv);	844
		845	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		846	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		847
		848	path = AvARRAY (av)[1];
		849	wdob = AvARRAY (av)[0];
		850
		851	if (SvOK (wdob))
		852	{
		853	*wd = SvAIO_WD (wdob);
		854	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		855	}
		856	else
		857	*wd = EIO_INVALID_WD;
750	}	858	}
751		859
752	reqs = reqe = 0;	860	*pathsv = newSVsv (path);
753		861	*ptr = SvPVbyte_nolen (*pathsv);
754	while (ress)	862	}
		863
		864	static void ecb_noinline
		865	req_set_path1 (aio_req req, SV *path)
		866	{
		867	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		868	}
		869
		870	static void ecb_noinline
		871	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		872	{
		873	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		874
		875	switch (SvTYPE (rv))
755	{	876	{
756	prv = ress;	877	case SVt_PVIO:
757	ress = prv->next;	878	case SVt_PVLV:
758	free_req (prv);	879	case SVt_PVGV:
		880	req->type = type_fh;
		881	req->sv1 = newSVsv (fh_or_path);
		882	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		883	break;
		884
		885	default:
		886	req->type = type_path;
		887	req_set_path1 (req, fh_or_path);
		888	break;
759	}	889	}
760
761	ress = rese = 0;
762
763	close (respipe [0]);
764	close (respipe [1]);
765	create_pipe ();
766
767	atfork_parent ();
768	}	890	}
769		891
770	#define dREQ \
771	aio_req req; \
772	\
773	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \
775	\
776	Newz (0, req, 1, aio_cb); \
777	if (!req) \
778	croak ("out of memory during aio_req allocation"); \
779	\
780	req->callback = newSVsv (callback);
781
782	MODULE = IO::AIO PACKAGE = IO::AIO	892	MODULE = IO::AIO PACKAGE = IO::AIO
783		893
784	PROTOTYPES: ENABLE	894	PROTOTYPES: ENABLE
785		895
786	BOOT:	896	BOOT:
787	{	897	{
		898	static const struct {
		899	const char *name;
		900	IV iv;
		901	} *civ, const_iv[] = {
		902	# define const_niv(name, value) { # name, (IV) value },
		903	# define const_iv(name) { # name, (IV) name },
		904	# define const_eio(name) { # name, (IV) EIO_ ## name },
		905	const_iv (EXDEV)
		906	const_iv (ENOSYS)
		907	const_iv (O_RDONLY)
		908	const_iv (O_WRONLY)
		909	const_iv (O_RDWR)
		910	const_iv (O_CREAT)
		911	const_iv (O_TRUNC)
		912	const_iv (O_EXCL)
		913	const_iv (O_APPEND)
		914
		915	const_iv (O_ASYNC)
		916	const_iv (O_DIRECT)
		917	const_iv (O_NOATIME)
		918
		919	const_iv (O_CLOEXEC)
		920	const_iv (O_NOCTTY)
		921	const_iv (O_NOFOLLOW)
		922	const_iv (O_NONBLOCK)
		923	const_iv (O_EXEC)
		924	const_iv (O_SEARCH)
		925	const_iv (O_DIRECTORY)
		926	const_iv (O_DSYNC)
		927	const_iv (O_RSYNC)
		928	const_iv (O_SYNC)
		929	const_iv (O_TTY_INIT)
		930
		931	const_iv (S_IFIFO)
		932	const_iv (S_IFCHR)
		933	const_iv (S_IFBLK)
		934	const_iv (S_IFLNK)
		935	const_iv (S_IFREG)
		936	const_iv (S_IFDIR)
		937	const_iv (S_IFWHT)
		938	const_iv (S_IFSOCK)
		939	const_iv (S_IFMT)
		940
		941	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		942	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		943	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		944	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		945	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		946	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		947
		948	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		949	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		950	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		951	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		952	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		953
		954	const_iv (ST_RDONLY)
		955	const_iv (ST_NOSUID)
		956	const_iv (ST_NODEV)
		957	const_iv (ST_NOEXEC)
		958	const_iv (ST_SYNCHRONOUS)
		959	const_iv (ST_MANDLOCK)
		960	const_iv (ST_WRITE)
		961	const_iv (ST_APPEND)
		962	const_iv (ST_IMMUTABLE)
		963	const_iv (ST_NOATIME)
		964	const_iv (ST_NODIRATIME)
		965	const_iv (ST_RELATIME)
		966
		967	const_iv (PROT_NONE)
		968	const_iv (PROT_EXEC)
		969	const_iv (PROT_READ)
		970	const_iv (PROT_WRITE)
		971
		972	/*const_iv (MAP_FIXED)*/
		973	const_iv (MAP_PRIVATE)
		974	const_iv (MAP_SHARED)
		975	const_iv (MAP_ANONYMOUS)
		976
		977	/* linuxish */
		978	const_iv (MAP_HUGETLB)
		979	const_iv (MAP_LOCKED)
		980	const_iv (MAP_NORESERVE)
		981	const_iv (MAP_POPULATE)
		982	const_iv (MAP_NONBLOCK)
		983
		984	const_eio (MCL_FUTURE)
		985	const_eio (MCL_CURRENT)
		986
		987	const_eio (MS_ASYNC)
		988	const_eio (MS_INVALIDATE)
		989	const_eio (MS_SYNC)
		990
		991	const_eio (MT_MODIFY)
		992
		993	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		994	const_eio (SYNC_FILE_RANGE_WRITE)
		995	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		996
		997	const_eio (FALLOC_FL_KEEP_SIZE)
		998
		999	const_eio (READDIR_DENTS)
		1000	const_eio (READDIR_DIRS_FIRST)
		1001	const_eio (READDIR_STAT_ORDER)
		1002	const_eio (READDIR_FOUND_UNKNOWN)
		1003
		1004	const_eio (DT_UNKNOWN)
		1005	const_eio (DT_FIFO)
		1006	const_eio (DT_CHR)
		1007	const_eio (DT_DIR)
		1008	const_eio (DT_BLK)
		1009	const_eio (DT_REG)
		1010	const_eio (DT_LNK)
		1011	const_eio (DT_SOCK)
		1012	const_eio (DT_WHT)
		1013	};
		1014
788	HV *stash = gv_stashpv ("IO::AIO", 1);	1015	aio_stash = gv_stashpv ("IO::AIO" , 1);
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1016	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1017	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1018	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
792		1019
793	create_pipe ();	1020	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1021	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
795	}
796		1022
		1023	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1024
		1025	reinit ();
		1026	}
		1027
797	void	1028	void
798	min_parallel (nthreads)	1029	reinit ()
799	int nthreads	1030	PROTOTYPE:
		1031
		1032	void
		1033	max_poll_reqs (unsigned int nreqs)
800	PROTOTYPE: $	1034	PROTOTYPE: $
		1035	CODE:
		1036	eio_set_max_poll_reqs (nreqs);
801		1037
802	void	1038	void
803	max_parallel (nthreads)	1039	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	1040	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	1041	CODE:
812	RETVAL = max_outstanding;	1042	eio_set_max_poll_time (nseconds);
		1043
		1044	void
		1045	min_parallel (unsigned int nthreads)
		1046	PROTOTYPE: $
		1047	CODE:
		1048	eio_set_min_parallel (nthreads);
		1049
		1050	void
		1051	max_parallel (unsigned int nthreads)
		1052	PROTOTYPE: $
		1053	CODE:
		1054	eio_set_max_parallel (nthreads);
		1055
		1056	void
		1057	max_idle (unsigned int nthreads)
		1058	PROTOTYPE: $
		1059	CODE:
		1060	eio_set_max_idle (nthreads);
		1061
		1062	void
		1063	idle_timeout (unsigned int seconds)
		1064	PROTOTYPE: $
		1065	CODE:
		1066	eio_set_idle_timeout (seconds);
		1067
		1068	void
		1069	max_outstanding (unsigned int maxreqs)
		1070	PROTOTYPE: $
		1071	CODE:
813	max_outstanding = nreqs;	1072	max_outstanding = maxreqs;
814		1073
815	void	1074	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1075	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
817	SV * pathname
818	int flags
819	int mode
820	SV * callback
821	PROTOTYPE: $$$;$
822	CODE:	1076	PPCODE:
823	{	1077	{
824	dREQ;	1078	dREQ;
825		1079
		1080	req->type = EIO_WD_OPEN;
		1081	req_set_path1 (req, pathname);
		1082
		1083	REQ_SEND;
		1084	}
		1085
		1086	void
		1087	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1088	PPCODE:
		1089	{
		1090	dREQ;
		1091
826	req->type = REQ_OPEN;	1092	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	1093	req_set_path1 (req, pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1094	req->int1 = flags;
830	req->mode = mode;	1095	req->int2 = mode;
831		1096
832	send_req (req);	1097	REQ_SEND;
833	}	1098	}
834		1099
835	void	1100	void
836	aio_close (fh,callback=&PL_sv_undef)	1101	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$
840	ALIAS:	1102	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1103	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1104	aio_fdatasync = EIO_FDATASYNC
		1105	aio_syncfs = EIO_SYNCFS
844	CODE:	1106	PPCODE:
845	{	1107	{
		1108	int fd = s_fileno_croak (fh, 0);
846	dREQ;	1109	dREQ;
847		1110
848	req->type = ix;	1111	req->type = ix;
849	req->fh = newSVsv (fh);	1112	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1113	req->int1 = fd;
851		1114
852	send_req (req);	1115	REQ_SEND (req);
853	}	1116	}
854		1117
855	void	1118	void
		1119	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1120	PPCODE:
		1121	{
		1122	int fd = s_fileno_croak (fh, 0);
		1123	dREQ;
		1124
		1125	req->type = EIO_SYNC_FILE_RANGE;
		1126	req->sv1 = newSVsv (fh);
		1127	req->int1 = fd;
		1128	req->offs = offset;
		1129	req->size = nbytes;
		1130	req->int2 = flags;
		1131
		1132	REQ_SEND (req);
		1133	}
		1134
		1135	void
		1136	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1137	PPCODE:
		1138	{
		1139	int fd = s_fileno_croak (fh, 0);
		1140	dREQ;
		1141
		1142	req->type = EIO_FALLOCATE;
		1143	req->sv1 = newSVsv (fh);
		1144	req->int1 = fd;
		1145	req->int2 = mode;
		1146	req->offs = offset;
		1147	req->size = len;
		1148
		1149	REQ_SEND (req);
		1150	}
		1151
		1152	void
		1153	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1154	PPCODE:
		1155	{
		1156	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1157	int fd = s_fileno_croak (fh, 0);
		1158	dREQ;
		1159
		1160	if (expect_false (close_fd < 0))
		1161	{
		1162	int pipefd [2];
		1163
		1164	if (
		1165	#ifdef _WIN32
		1166	_pipe (pipefd, 1, _O_BINARY) < 0
		1167	#else
		1168	pipe (pipefd) < 0
		1169	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1170	#endif
		1171	|| close (pipefd [1]) < 0
		1172	)
		1173	abort (); /*D*/
		1174
		1175	close_fd = pipefd [0];
		1176	}
		1177
		1178	req->type = EIO_DUP2;
		1179	req->int1 = close_fd;
		1180	req->sv2 = newSVsv (fh);
		1181	req->int2 = fd;
		1182
		1183	REQ_SEND (req);
		1184	}
		1185
		1186	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1187	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:	1188	ALIAS:
864	aio_read = REQ_READ	1189	aio_read = EIO_READ
865	aio_write = REQ_WRITE	1190	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$
867	CODE:	1191	PPCODE:
868	{	1192	{
869	aio_req req;
870	STRLEN svlen;	1193	STRLEN svlen;
		1194	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	1195	char *svptr = SvPVbyte (data, svlen);
872		1196	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		1197
876	if (dataoffset < 0)	1198	if (dataoffset < 0)
877	dataoffset += svlen;	1199	dataoffset += svlen;
878		1200
879	if (dataoffset < 0 || dataoffset > svlen)	1201	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	1202	croak ("dataoffset outside of data scalar");
881		1203
882	if (ix == REQ_WRITE)	1204	if (ix == EIO_WRITE)
883	{	1205	{
884	/* write: check length and adjust. */	1206	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	1207	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	1208	len = svlen - dataoffset;
887	}	1209	}
888	else	1210	else
889	{	1211	{
890	/* read: grow scalar as necessary */	1212	/* read: check type and grow scalar as necessary */
		1213	SvUPGRADE (data, SVt_PV);
891	svptr = SvGROW (data, length + dataoffset);	1214	svptr = SvGROW (data, len + dataoffset + 1);
892	}	1215	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		1216
897	{	1217	{
898	dREQ;	1218	dREQ;
899		1219
900	req->type = ix;	1220	req->type = ix;
901	req->fh = newSVsv (fh);	1221	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1222	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	1223	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	1224	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	1225	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	1226	req->ptr2 = (char *)svptr + dataoffset;
		1227	req->stroffset = dataoffset;
908		1228
909	if (!SvREADONLY (data))	1229	if (!SvREADONLY (data))
910	{	1230	{
911	SvREADONLY_on (data);	1231	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1232	req->flags |= FLAG_SV2_RO_OFF;
913	}	1233	}
914		1234
915	send_req (req);	1235	REQ_SEND;
916	}	1236	}
917	}	1237	}
918		1238
919	void	1239	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1240	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
921	SV * out_fh	1241	ALIAS:
922	SV * in_fh	1242	aio_readlink = EIO_READLINK
923	UV in_offset	1243	aio_realpath = EIO_REALPATH
924	UV length
925	SV * callback
926	PROTOTYPE: $$$$;$
927	CODE:	1244	PPCODE:
928	{	1245	{
		1246	dREQ;
		1247
		1248	req->type = ix;
		1249	req_set_path1 (req, pathname);
		1250
		1251	REQ_SEND;
		1252	}
		1253
		1254	void
		1255	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1256	PPCODE:
		1257	{
		1258	int ifd = s_fileno_croak (in_fh , 0);
		1259	int ofd = s_fileno_croak (out_fh, 1);
929	dREQ;	1260	dREQ;
930		1261
931	req->type = REQ_SENDFILE;	1262	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	1263	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1264	req->int1 = ofd;
934	req->fh2 = newSVsv (in_fh);	1265	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1266	req->int2 = ifd;
936	req->offset = in_offset;	1267	req->offs = in_offset;
937	req->length = length;	1268	req->size = length;
938		1269
939	send_req (req);	1270	REQ_SEND;
940	}	1271	}
941		1272
942	void	1273	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1274	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$
949	CODE:	1275	PPCODE:
950	{	1276	{
		1277	int fd = s_fileno_croak (fh, 0);
951	dREQ;	1278	dREQ;
952		1279
953	req->type = REQ_READAHEAD;	1280	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	1281	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1282	req->int1 = fd;
956	req->offset = offset;	1283	req->offs = offset;
957	req->length = length;	1284	req->size = length;
958		1285
959	send_req (req);	1286	REQ_SEND;
960	}	1287	}
961		1288
962	void	1289	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1290	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	1291	ALIAS:
967	aio_stat = REQ_STAT	1292	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	1293	aio_lstat = EIO_LSTAT
		1294	aio_statvfs = EIO_STATVFS
969	CODE:	1295	PPCODE:
970	{	1296	{
971	dREQ;	1297	dREQ;
972		1298
973	New (0, req->statdata, 1, Stat_t);
974	if (!req->statdata)
975	{
976	free_req (req);
977	croak ("out of memory during aio_req->statdata allocation");
978	}
979
980	if (SvPOK (fh_or_path))
981	{
982	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);
985	}
986	else
987	{
988	req->type = REQ_FSTAT;
989	req->fh = newSVsv (fh_or_path);	1299	req->sv1 = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1300	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
991	}	1301	REQ_SEND;
992
993	send_req (req);
994	}	1302	}
995		1303
		1304	UV
		1305	major (UV dev)
		1306	ALIAS:
		1307	minor = 1
		1308	CODE:
		1309	RETVAL = ix ? major (dev) : minor (dev);
		1310	OUTPUT:
		1311	RETVAL
		1312
		1313	UV
		1314	makedev (UV maj, UV min)
		1315	CODE:
		1316	RETVAL = makedev (maj, min);
		1317	OUTPUT:
		1318	RETVAL
		1319
996	void	1320	void
		1321	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1322	PPCODE:
		1323	{
		1324	dREQ;
		1325
		1326	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1327	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1328	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1329
		1330	REQ_SEND;
		1331	}
		1332
		1333	void
		1334	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1335	PPCODE:
		1336	{
		1337	dREQ;
		1338
		1339	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1340	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1341
		1342	REQ_SEND;
		1343	}
		1344
		1345	void
		1346	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1347	PPCODE:
		1348	{
		1349	dREQ;
		1350
		1351	req->int2 = mode;
		1352	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1353
		1354	REQ_SEND;
		1355	}
		1356
		1357	void
		1358	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1359	PPCODE:
		1360	{
		1361	dREQ;
		1362
		1363	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1364	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1365	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1366
		1367	REQ_SEND;
		1368	}
		1369
		1370	void
		1371	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1372	PPCODE:
		1373	{
		1374	dREQ;
		1375
		1376	req->type = EIO_READDIR;
		1377	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1378
		1379	if (flags & EIO_READDIR_DENTS)
		1380	req->int1 |= EIO_READDIR_CUSTOM2;
		1381
		1382	req_set_path1 (req, pathname);
		1383
		1384	REQ_SEND;
		1385	}
		1386
		1387	void
		1388	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1389	PPCODE:
		1390	{
		1391	dREQ;
		1392
		1393	req->type = EIO_MKDIR;
		1394	req->int2 = mode;
		1395	req_set_path1 (req, pathname);
		1396
		1397	REQ_SEND;
		1398	}
		1399
		1400	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1401	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1402	ALIAS:
1001	aio_unlink = REQ_UNLINK	1403	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	1404	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	1405	aio_readdir = EIO_READDIR
1004	CODE:	1406	PPCODE:
1005	{	1407	{
1006	dREQ;	1408	dREQ;
1007		1409
1008	req->type = ix;	1410	req->type = ix;
1009	req->data = newSVsv (pathname);	1411	req_set_path1 (req, pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1412
		1413	REQ_SEND;
		1414	}
		1415
		1416	void
		1417	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1418	ALIAS:
		1419	aio_link = EIO_LINK
		1420	aio_symlink = EIO_SYMLINK
		1421	aio_rename = EIO_RENAME
		1422	PPCODE:
		1423	{
		1424	dREQ;
		1425	eio_wd wd2 = 0;
1011		1426
1012	send_req (req);	1427	req->type = ix;
		1428	req_set_path1 (req, oldpath);
		1429	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1430	req->int3 = (long)wd2;
		1431
		1432	REQ_SEND;
1013	}	1433	}
1014		1434
1015	void	1435	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1436	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:
1021	aio_link = REQ_LINK
1022	aio_symlink = REQ_SYMLINK
1023	aio_rename = REQ_RENAME
1024	CODE:	1437	PPCODE:
1025	{	1438	{
1026	dREQ;	1439	dREQ;
1027		1440
		1441	req->type = EIO_MKNOD;
		1442	req->int2 = (mode_t)mode;
		1443	req->offs = dev;
		1444	req_set_path1 (req, pathname);
		1445
		1446	REQ_SEND;
		1447	}
		1448
		1449	void
		1450	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1451	ALIAS:
		1452	aio_mtouch = EIO_MTOUCH
		1453	aio_msync = EIO_MSYNC
		1454	PPCODE:
		1455	{
		1456	STRLEN svlen;
		1457	char *svptr = SvPVbyte (data, svlen);
		1458	UV len = SvUV (length);
		1459
		1460	if (offset < 0)
		1461	offset += svlen;
		1462
		1463	if (offset < 0 || offset > svlen)
		1464	croak ("offset outside of scalar");
		1465
		1466	if (!SvOK (length) || len + offset > svlen)
		1467	len = svlen - offset;
		1468
		1469	{
		1470	dREQ;
		1471
		1472	req->type = ix;
		1473	req->sv2 = SvREFCNT_inc (data);
		1474	req->ptr2 = (char *)svptr + offset;
		1475	req->size = len;
		1476	req->int1 = flags;
		1477
		1478	REQ_SEND;
		1479	}
		1480	}
		1481
		1482	void
		1483	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1484	PPCODE:
		1485	{
		1486	STRLEN svlen;
		1487	char *svptr = SvPVbyte (data, svlen);
		1488	UV len = SvUV (length);
		1489
		1490	if (offset < 0)
		1491	offset += svlen;
		1492
		1493	if (offset < 0 || offset > svlen)
		1494	croak ("offset outside of scalar");
		1495
		1496	if (!SvOK (length) || len + offset > svlen)
		1497	len = svlen - offset;
		1498
		1499	{
		1500	dREQ;
		1501
		1502	req->type = EIO_MLOCK;
		1503	req->sv2 = SvREFCNT_inc (data);
		1504	req->ptr2 = (char *)svptr + offset;
		1505	req->size = len;
		1506
		1507	REQ_SEND;
		1508	}
		1509	}
		1510
		1511	void
		1512	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1513	PPCODE:
		1514	{
		1515	dREQ;
		1516
		1517	req->type = EIO_MLOCKALL;
		1518	req->int1 = flags;
		1519
		1520	REQ_SEND;
		1521	}
		1522
		1523	void
		1524	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1525	PPCODE:
		1526	{
		1527	dREQ;
		1528
		1529	req->type = EIO_BUSY;
		1530	req->nv1 = delay < 0. ? 0. : delay;
		1531
		1532	REQ_SEND;
		1533	}
		1534
		1535	void
		1536	aio_group (SV *callback=&PL_sv_undef)
		1537	PPCODE:
		1538	{
		1539	dREQ;
		1540
		1541	req->type = EIO_GROUP;
		1542
		1543	req_submit (req);
		1544	XPUSHs (req_sv (req, aio_grp_stash));
		1545	}
		1546
		1547	void
		1548	aio_nop (SV *callback=&PL_sv_undef)
		1549	ALIAS:
		1550	aio_nop = EIO_NOP
		1551	aio_sync = EIO_SYNC
		1552	PPCODE:
		1553	{
		1554	dREQ;
		1555
1028	req->type = ix;	1556	req->type = ix;
1029	req->fh = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);
1031	req->data = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);
1033
1034	send_req (req);
1035	}
1036		1557
1037	#if 0	1558	REQ_SEND;
1038
1039	# undocumented, because it does not cancel active requests
1040	void
1041	cancel_most_requests ()
1042	PROTOTYPE:
1043	CODE:
1044	{
1045	aio_req *req;
1046
1047	pthread_mutex_lock (&reqlock);
1048	for (req = reqs; req; req = req->next)
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051
1052	pthread_mutex_lock (&reslock);
1053	for (req = ress; req; req = req->next)
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}	1559	}
1057		1560
1058	#endif	1561	int
		1562	aioreq_pri (int pri = 0)
		1563	CODE:
		1564	RETVAL = next_pri;
		1565	if (items > 0)
		1566	{
		1567	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1568	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1569	next_pri = pri;
		1570	}
		1571	OUTPUT:
		1572	RETVAL
		1573
		1574	void
		1575	aioreq_nice (int nice = 0)
		1576	CODE:
		1577	nice = next_pri - nice;
		1578	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1579	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1580	next_pri = nice;
1059		1581
1060	void	1582	void
1061	flush ()	1583	flush ()
1062	PROTOTYPE:
1063	CODE:	1584	CODE:
1064	while (nreqs)	1585	while (eio_nreqs ())
1065	{	1586	{
1066	poll_wait ();	1587	poll_wait ();
1067	poll_cb ();	1588	poll_cb ();
1068	}	1589	}
1069		1590
1070	void
1071	poll()
1072	PROTOTYPE:
1073	CODE:
1074	if (nreqs)
1075	{
1076	poll_wait ();
1077	poll_cb ();
1078	}
1079
1080	int	1591	int
1081	poll_fileno()	1592	poll ()
1082	PROTOTYPE:
1083	CODE:	1593	CODE:
1084	RETVAL = respipe [0];	1594	poll_wait ();
1085	OUTPUT:
1086	RETVAL
1087
1088	int
1089	poll_cb(...)
1090	PROTOTYPE:
1091	CODE:
1092	RETVAL = poll_cb ();	1595	RETVAL = poll_cb ();
1093	OUTPUT:	1596	OUTPUT:
1094	RETVAL	1597	RETVAL
1095		1598
1096	void
1097	poll_wait()
1098	PROTOTYPE:
1099	CODE:
1100	if (nreqs)
1101	poll_wait ();
1102
1103	int	1599	int
1104	nreqs()	1600	poll_fileno ()
1105	PROTOTYPE:
1106	CODE:	1601	CODE:
1107	RETVAL = nreqs;	1602	RETVAL = s_epipe_fd (&respipe);
1108	OUTPUT:	1603	OUTPUT:
1109	RETVAL	1604	RETVAL
1110		1605
		1606	int
		1607	poll_cb (...)
		1608	PROTOTYPE:
		1609	CODE:
		1610	RETVAL = poll_cb ();
		1611	OUTPUT:
		1612	RETVAL
		1613
		1614	void
		1615	poll_wait ()
		1616	CODE:
		1617	poll_wait ();
		1618
		1619	int
		1620	nreqs ()
		1621	CODE:
		1622	RETVAL = eio_nreqs ();
		1623	OUTPUT:
		1624	RETVAL
		1625
		1626	int
		1627	nready ()
		1628	CODE:
		1629	RETVAL = eio_nready ();
		1630	OUTPUT:
		1631	RETVAL
		1632
		1633	int
		1634	npending ()
		1635	CODE:
		1636	RETVAL = eio_npending ();
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	int
		1641	nthreads ()
		1642	CODE:
		1643	RETVAL = eio_nthreads ();
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	int
		1648	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1649	CODE:
		1650	RETVAL = posix_fadvise (fh, offset, length, advice);
		1651	OUTPUT:
		1652	RETVAL
		1653
		1654	IV
		1655	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1656	CODE:
		1657	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1658	OUTPUT:
		1659	RETVAL
		1660
		1661	void
		1662	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1663	PPCODE:
		1664	sv_unmagic (scalar, MMAP_MAGIC);
		1665	{
		1666	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1667	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1668	if (addr == (void *)-1)
		1669	XSRETURN_NO;
		1670
		1671	sv_force_normal (scalar);
		1672
		1673	/* we store the length in mg_obj, as namlen is I32 :/ */
		1674	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1675	->mg_obj = (SV *)length;
		1676
		1677	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1678
		1679	if (!(prot & PROT_WRITE))
		1680	SvREADONLY_on (scalar);
		1681
		1682	if (SvLEN (scalar))
		1683	Safefree (SvPVX (scalar));
		1684
		1685	SvPVX (scalar) = (char *)addr;
		1686	SvCUR_set (scalar, length);
		1687	SvLEN_set (scalar, 0);
		1688	SvPOK_only (scalar);
		1689
		1690	XSRETURN_YES;
		1691	}
		1692
		1693	void
		1694	munmap (SV *scalar)
		1695	CODE:
		1696	sv_unmagic (scalar, MMAP_MAGIC);
		1697
		1698	int
		1699	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1700	ALIAS:
		1701	mprotect = 1
		1702	CODE:
		1703	{
		1704	STRLEN svlen;
		1705	void *addr = SvPVbyte (scalar, svlen);
		1706	size_t len = SvUV (length);
		1707
		1708	if (offset < 0)
		1709	offset += svlen;
		1710
		1711	if (offset < 0 || offset > svlen)
		1712	croak ("offset outside of scalar");
		1713
		1714	if (!SvOK (length) || len + offset > svlen)
		1715	len = svlen - offset;
		1716
		1717	addr = (void *)(((intptr_t)addr) + offset);
		1718	eio_page_align (&addr, &len);
		1719
		1720	switch (ix)
		1721	{
		1722	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1723	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1724	}
		1725	}
		1726	OUTPUT:
		1727	RETVAL
		1728
		1729	int
		1730	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1731	CODE:
		1732	{
		1733	STRLEN svlen;
		1734	void *addr = SvPVbyte (scalar, svlen);
		1735	size_t len = SvUV (length);
		1736
		1737	if (offset < 0)
		1738	offset += svlen;
		1739
		1740	if (offset < 0 || offset > svlen)
		1741	croak ("offset outside of scalar");
		1742
		1743	if (!SvOK (length) || len + offset > svlen)
		1744	len = svlen - offset;
		1745
		1746	addr = (void *)(((intptr_t)addr) + offset);
		1747	eio_page_align (&addr, &len);
		1748	#if _POSIX_MEMLOCK_RANGE
		1749	RETVAL = munlock (addr, len);
		1750	#else
		1751	RETVAL = ((errno = ENOSYS), -1);
		1752	#endif
		1753	}
		1754	OUTPUT:
		1755	RETVAL
		1756
		1757	int
		1758	munlockall ()
		1759	CODE:
		1760	#if _POSIX_MEMLOCK
		1761	munlockall ();
		1762	#else
		1763	RETVAL = -1;
		1764	errno = ENOSYS;
		1765	#endif
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769	void _on_next_submit (SV *cb)
		1770	CODE:
		1771	SvREFCNT_dec (on_next_submit);
		1772	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1773
		1774	PROTOTYPES: DISABLE
		1775
		1776	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1777
		1778	BOOT:
		1779	{
		1780	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1781	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1782	}
		1783
		1784	void
		1785	DESTROY (SV *self)
		1786	CODE:
		1787	{
		1788	aio_wd wd = SvAIO_WD (self);
		1789	#if HAVE_AT
		1790	SV *callback = &PL_sv_undef;
		1791	dREQ; /* clobbers next_pri :/ */
		1792	req->type = EIO_WD_CLOSE;
		1793	req->wd = wd;
		1794	REQ_SEND;
		1795	#else
		1796	eio_wd_close_sync (wd);
		1797	#endif
		1798	}
		1799
		1800	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1801
		1802	void
		1803	cancel (aio_req_ornot req)
		1804	CODE:
		1805	eio_cancel (req);
		1806
		1807	void
		1808	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1809	PPCODE:
		1810	{
		1811	if (GIMME_V != G_VOID)
		1812	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1813
		1814	if (items > 1)
		1815	{
		1816	SV *cb_cv =get_cb (callback);
		1817
		1818	SvREFCNT_dec (req->callback);
		1819	req->callback = SvREFCNT_inc (cb_cv);
		1820	}
		1821	}
		1822
		1823	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1824
		1825	void
		1826	add (aio_req grp, ...)
		1827	PPCODE:
		1828	{
		1829	int i;
		1830
		1831	if (grp->int1 == 2)
		1832	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1833
		1834	for (i = 1; i < items; ++i )
		1835	{
		1836	aio_req req;
		1837
		1838	if (GIMME_V != G_VOID)
		1839	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1840
		1841	req = SvAIO_REQ (ST (i));
		1842
		1843	if (req)
		1844	eio_grp_add (grp, req);
		1845	}
		1846	}
		1847
		1848	void
		1849	cancel_subs (aio_req_ornot req)
		1850	CODE:
		1851	req_cancel_subs (req);
		1852
		1853	void
		1854	result (aio_req grp, ...)
		1855	CODE:
		1856	{
		1857	int i;
		1858	AV *av;
		1859
		1860	grp->errorno = errno;
		1861
		1862	av = newAV ();
		1863	av_extend (av, items - 1);
		1864
		1865	for (i = 1; i < items; ++i )
		1866	av_push (av, newSVsv (ST (i)));
		1867
		1868	SvREFCNT_dec (grp->sv1);
		1869	grp->sv1 = (SV *)av;
		1870	}
		1871
		1872	void
		1873	errno (aio_req grp, int errorno = errno)
		1874	CODE:
		1875	grp->errorno = errorno;
		1876
		1877	void
		1878	limit (aio_req grp, int limit)
		1879	CODE:
		1880	eio_grp_limit (grp, limit);
		1881
		1882	void
		1883	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1884	CODE:
		1885	{
		1886	SvREFCNT_dec (grp->sv2);
		1887	grp->sv2 = newSVsv (callback);
		1888	grp->feed = aio_grp_feed;
		1889
		1890	if (grp->int2 <= 0)
		1891	grp->int2 = 2;
		1892
		1893	eio_grp_limit (grp, grp->int2);
		1894	}
		1895

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