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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.195 by root, Mon Sep 26 20:19:08 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
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14
15	#include <unistd.h>	16	#include <limits.h>
16	#include <fcntl.h>	17	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	18	#include <sched.h>
19		19
20	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
21	# if __linux
22	# include <sys/sendfile.h>
23	# elif __freebsd
24	# include <sys/socket.h>
25	# include <sys/uio.h>	21	# include <sys/mman.h>
26	# 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
		69	#include <sys/time.h>
27	# include <sys/socket.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
28	# else	295	# else
29	# error sendfile support requested but not available	296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
30	# endif	297	# endif
31	#endif	298	#endif
		299	#ifndef MAP_HUGETLB
		300	# define MAP_HUGETLB 0
		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
32		314
33	#if __ia64	315	#ifndef makedev
34	# define STACKSIZE 65536	316	# define makedev(maj,min) (((maj) << 8) | (min))
35	#else	317	#endif
36	# define STACKSIZE 4096	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)
37	#endif	327	#endif
38		328
39	enum {	329	enum {
40	REQ_QUIT,	330	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
41	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,
43	REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
45	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,
47	REQ_SYMLINK,
48	};	331	};
49		332
50	typedef struct aio_cb {
51	struct aio_cb *volatile next;
52
53	int type;
54
55	int fd, fd2;
56	off_t offset;
57	size_t length;
58	ssize_t result;
59	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65
66	Stat_t *statdata;
67	} aio_cb;
68
69	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
		334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd *aio_wd;
70		336
71	static int started, wanted;	337	static SV *on_next_submit;
72	static volatile int nreqs;	338	static int next_pri = EIO_PRI_DEFAULT;
73	static int max_outstanding = 1<<30;	339	static int max_outstanding;
74	static int respipe [2];
75		340
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	341	static s_epipe respipe;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79		342
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	343	static void req_destroy (aio_req req);
81	static volatile aio_req ress, rese; /* queue start, queue end */
82
83	static void free_req (aio_req req)	344	static void req_cancel (aio_req req);
84	{
85	if (req->data)
86	SvREFCNT_dec (req->data);
87		345
		346	static void want_poll (void)
		347	{
		348	/* write a dummy byte to the pipe so fh becomes ready */
		349	s_epipe_signal (&respipe);
		350	}
		351
		352	static void done_poll (void)
		353	{
		354	/* read any signals sent by the worker threads */
		355	s_epipe_drain (&respipe);
		356	}
		357
		358	/* must be called at most once */
		359	static SV *req_sv (aio_req req, HV *stash)
		360	{
88	if (req->fh)	361	if (!req->self)
89	SvREFCNT_dec (req->fh);
90
91	if (req->fh2)
92	SvREFCNT_dec (req->fh2);
93
94	if (req->statdata)
95	Safefree (req->statdata);
96
97	if (req->callback)
98	SvREFCNT_dec (req->callback);
99
100	Safefree (req);
101	}
102
103	static void
104	poll_wait ()
105	{
106	if (nreqs && !ress)
107	{	362	{
108	fd_set rfd;	363	req->self = (SV *)newHV ();
109	FD_ZERO(&rfd);	364	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
110	FD_SET(respipe [0], &rfd);
111
112	select (respipe [0] + 1, &rfd, 0, 0, 0);
113	}	365	}
114	}
115		366
116	static int	367	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
117	poll_cb ()	368	}
118	{
119	dSP;
120	int count = 0;
121	int do_croak = 0;
122	aio_req req;
123		369
124	for (;;)	370	static aio_req SvAIO_REQ (SV *sv)
		371	{
		372	MAGIC *mg;
		373
		374	if (!SvROK (sv)
		375	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		376	&& SvSTASH (SvRV (sv)) != aio_req_stash
		377	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		378	croak ("object of class IO::AIO::REQ expected");
		379
		380	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		381
		382	return mg ? (aio_req)mg->mg_ptr : 0;
		383	}
		384
		385	static aio_wd SvAIO_WD (SV *sv)
		386	{
		387	if (!SvROK (sv)
		388	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		389	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		390	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		391
		392	return (aio_wd)(long)SvIVX (SvRV (sv));
		393	}
		394
		395	static void aio_grp_feed (aio_req grp)
		396	{
		397	if (grp->sv2 && SvOK (grp->sv2))
125	{	398	{
126	pthread_mutex_lock (&reslock);	399	dSP;
127	req = ress;
128		400
129	if (req)	401	ENTER;
		402	SAVETMPS;
		403	PUSHMARK (SP);
		404	XPUSHs (req_sv (grp, aio_grp_stash));
		405	PUTBACK;
		406	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		407	SPAGAIN;
		408	FREETMPS;
		409	LEAVE;
		410	}
		411	}
		412
		413	static void req_submit (eio_req *req)
		414	{
		415	eio_submit (req);
		416
		417	if (expect_false (on_next_submit))
		418	{
		419	dSP;
		420	SV *cb = sv_2mortal (on_next_submit);
		421
		422	on_next_submit = 0;
		423
		424	PUSHMARK (SP);
		425	PUTBACK;
		426	call_sv (cb, G_DISCARD | G_EVAL);
		427	}
		428	}
		429
		430	static int req_invoke (eio_req *req)
		431	{
		432	if (req->flags & FLAG_SV2_RO_OFF)
		433	SvREADONLY_off (req->sv2);
		434
		435	if (!EIO_CANCELLED (req) && req->callback)
		436	{
		437	dSP;
		438	static SV *sv_result_cache; /* caches the result integer SV */
		439	SV *sv_result;
		440
		441	ENTER;
		442	SAVETMPS;
		443	PUSHMARK (SP);
		444	EXTEND (SP, 1);
		445
		446	/* do not recreate the result IV from scratch each time */
		447	if (expect_true (sv_result_cache))
130	{	448	{
131	ress = req->next;	449	sv_result = sv_result_cache; sv_result_cache = 0;
132		450	SvIV_set (sv_result, req->result);
133	if (!ress)	451	SvIOK_only (sv_result);
134	{
135	/* read any signals sent by the worker threads */
136	char buf [32];
137	while (read (respipe [0], buf, 32) == 32)
138	;
139
140	rese = 0;
141	}
142	}
143
144	pthread_mutex_unlock (&reslock);
145
146	if (!req)
147	break;
148
149	nreqs--;
150
151	if (req->type == REQ_QUIT)
152	started--;
153	else
154	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);
163
164	if (req->statdata)
165	{
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);
169	}
170
171	ENTER;
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174
175	if (req->type == REQ_OPEN)
176	{
177	/* convert fd to fh */
178	SV *fh;
179
180	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
182	SPAGAIN;
183
184	fh = SvREFCNT_inc (POPs);
185
186	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));
188	}
189
190	if (SvOK (req->callback))
191	{
192	PUTBACK;
193	call_sv (req->callback, G_VOID | G_EVAL);
194	SPAGAIN;
195
196	if (SvTRUE (ERRSV))
197	{
198	free_req (req);
199	croak (0);
200	}
201	}
202
203	LEAVE;
204
205	errno = errorno;
206	count++;
207	}
208
209	free_req (req);
210	}
211
212	return count;
213	}
214
215	static void *aio_proc(void *arg);
216
217	static void
218	start_thread (void)
219	{
220	sigset_t fullsigset, oldsigset;
221	pthread_t tid;
222	pthread_attr_t attr;
223
224	pthread_attr_init (&attr);
225	pthread_attr_setstacksize (&attr, STACKSIZE);
226	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227
228	sigfillset (&fullsigset);
229	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230
231	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
232	started++;
233
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}
236
237	static void
238	send_req (aio_req req)
239	{
240	while (started < wanted && nreqs >= started)
241	start_thread ();
242
243	nreqs++;
244
245	pthread_mutex_lock (&reqlock);
246
247	req->next = 0;
248
249	if (reqe)
250	{
251	reqe->next = req;
252	reqe = req;
253	}
254	else
255	reqe = reqs = req;
256
257	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);
259
260	if (nreqs > max_outstanding)
261	for (;;)
262	{
263	poll_cb ();
264
265	if (nreqs <= max_outstanding)
266	break;
267
268	poll_wait ();
269	}
270	}
271
272	static void
273	end_thread (void)
274	{
275	aio_req req;
276	Newz (0, req, 1, aio_cb);
277	req->type = REQ_QUIT;
278
279	send_req (req);
280	}
281
282	static void min_parallel (int nthreads)
283	{
284	if (wanted < nthreads)
285	wanted = nthreads;
286	}
287
288	static void max_parallel (int nthreads)
289	{
290	int cur = started;
291
292	if (wanted > nthreads)
293	wanted = nthreads;
294
295	while (cur > wanted)
296	{
297	end_thread ();
298	cur--;
299	}
300
301	while (started > wanted)
302	{
303	poll_wait ();
304	poll_cb ();
305	}
306	}
307
308	static void create_pipe ()
309	{
310	if (pipe (respipe))
311	croak ("unable to initialize result pipe");
312
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");
315
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}
331
332	static void atfork_child (void)
333	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();
359
360	atfork_parent ();
361	}
362
363	/*****************************************************************************/
364	/* work around various missing functions */
365
366	#if !HAVE_PREADWRITE
367	# define pread aio_pread
368	# define pwrite aio_pwrite
369
370	/*
371	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.
374	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
376
377	static ssize_t
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{
380	ssize_t res;
381	off_t ooffset;
382
383	pthread_mutex_lock (&iolock);
384	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);
389
390	return res;
391	}
392
393	static ssize_t
394	pwrite (int fd, void *buf, size_t count, off_t offset)
395	{
396	ssize_t res;
397	off_t ooffset;
398
399	pthread_mutex_lock (&iolock);
400	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);
405
406	return res;
407	}
408	#endif
409
410	#if !HAVE_FDATASYNC
411	# define fdatasync fsync
412	#endif
413
414	#if !HAVE_READAHEAD
415	# define readahead aio_readahead
416
417	static char readahead_buf[4096];
418
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)
421	{
422	while (count > 0)
423	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
425
426	pread (fd, readahead_buf, len, offset);
427	offset += len;
428	count -= len;
429	}
430
431	errno = 0;
432	}
433	#endif
434
435	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
438	{
439	ssize_t res;
440
441	if (!count)
442	return 0;
443
444	#if __linux
445	res = sendfile (ofd, ifd, &offset, count);
446
447	#elif __freebsd
448	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.
451	*/
452	{
453	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455
456	if (!res && errno == EAGAIN)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */
458	res = sbytes;
459	}
460
461	#elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);
463
464	#else
465	res = -1;
466	errno = ENOSYS;
467	#endif
468
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
470	{
471	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);
473	res = 0;
474
475	for (;;)
476	{
477	ssize_t cnt;
478
479	cnt = pread (ifd, buf, 4096, offset);
480
481	if (cnt <= 0)
482	{
483	if (cnt && !res) res = -1;
484	break;
485	}
486
487	cnt = write (ofd, buf, cnt);
488
489	if (cnt <= 0)
490	{
491	if (cnt && !res) res = -1;
492	break;
493	}
494
495	offset += cnt;
496	res += cnt;
497	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}
505
506	return res;
507	}
508
509	/*****************************************************************************/
510
511	static void *
512	aio_proc (void *thr_arg)
513	{
514	aio_req req;
515	int type;
516
517	do
518	{
519	pthread_mutex_lock (&reqlock);
520
521	for (;;)
522	{
523	req = reqs;
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530
531	if (req)
532	break;
533
534	pthread_cond_wait (&reqwait, &reqlock);
535	}
536
537	pthread_mutex_unlock (&reqlock);
538
539	errno = 0; /* strictly unnecessary */
540
541	type = req->type;
542
543	switch (type)
544	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
546	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
549	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
550
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;
563
564	case REQ_QUIT:
565	break;
566
567	default:
568	req->result = ENOSYS;
569	break;
570	}
571
572	req->errorno = errno;
573
574	pthread_mutex_lock (&reslock);
575
576	req->next = 0;
577
578	if (rese)
579	{
580	rese->next = req;
581	rese = req;
582	}	452	}
583	else	453	else
584	{	454	{
585	rese = ress = req;	455	sv_result = newSViv (req->result);
586		456	SvREADONLY_on (sv_result);
587	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);
589	}	457	}
590		458
591	pthread_mutex_unlock (&reslock);	459	switch (req->type)
		460	{
		461	case EIO_WD_OPEN:
		462	PUSHs (sv_2mortal (sv_bless (newRV_noinc (newSViv (((long)req->wd))), aio_wd_stash)));
		463	break;
		464
		465	case EIO_READDIR:
		466	{
		467	SV *rv = &PL_sv_undef;
		468
		469	if (req->result >= 0)
		470	{
		471	int i;
		472	char *names = (char *)req->ptr2;
		473	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		474	AV *av = newAV ();
		475
		476	av_extend (av, req->result - 1);
		477
		478	for (i = 0; i < req->result; ++i)
		479	{
		480	if (req->int1 & EIO_READDIR_DENTS)
		481	{
		482	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		483
		484	if (req->int1 & EIO_READDIR_CUSTOM2)
		485	{
		486	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		487	AV *avent = newAV ();
		488
		489	av_extend (avent, 2);
		490
		491	if (!sv_type [ent->type])
		492	{
		493	sv_type [ent->type] = newSViv (ent->type);
		494	SvREADONLY_on (sv_type [ent->type]);
		495	}
		496
		497	av_store (avent, 0, namesv);
		498	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		499	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		500
		501	av_store (av, i, newRV_noinc ((SV *)avent));
		502	}
		503	else
		504	av_store (av, i, namesv);
		505
		506	++ent;
		507	}
		508	else
		509	{
		510	SV *name = newSVpv (names, 0);
		511	av_store (av, i, name);
		512	names += SvCUR (name) + 1;
		513	}
		514	}
		515
		516	rv = sv_2mortal (newRV_noinc ((SV *)av));
		517	}
		518
		519	PUSHs (rv);
		520
		521	if (req->int1 & EIO_READDIR_CUSTOM1)
		522	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		523	}
		524	break;
		525
		526	case EIO_OPEN:
		527	{
		528	/* convert fd to fh */
		529	SV *fh = &PL_sv_undef;
		530
		531	if (req->result >= 0)
		532	{
		533	GV *gv = (GV *)sv_newmortal ();
		534	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		535	char sym [64];
		536	int symlen;
		537
		538	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		539	gv_init (gv, aio_stash, sym, symlen, 0);
		540
		541	symlen = snprintf (
		542	sym,
		543	sizeof (sym),
		544	"%s&=%d",
		545	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		546	(int)req->result
		547	);
		548
		549	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		550	fh = (SV *)gv;
		551	}
		552
		553	PUSHs (fh);
		554	}
		555	break;
		556
		557	case EIO_STATVFS:
		558	case EIO_FSTATVFS:
		559	{
		560	SV *rv = &PL_sv_undef;
		561
		562	#ifndef _WIN32
		563	if (req->result >= 0)
		564	{
		565	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		566	HV *hv = newHV ();
		567
		568	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		569
		570	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		571	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		572	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		573	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		574	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		575	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		576	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		577	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		578	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		579	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		580	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		581	}
		582	#endif
		583
		584	PUSHs (rv);
		585	}
		586
		587	break;
		588
		589	case EIO_GROUP:
		590	req->int1 = 2; /* mark group as finished */
		591
		592	if (req->sv1)
		593	{
		594	int i;
		595	AV *av = (AV *)req->sv1;
		596
		597	EXTEND (SP, AvFILL (av) + 1);
		598	for (i = 0; i <= AvFILL (av); ++i)
		599	PUSHs (*av_fetch (av, i, 0));
		600	}
		601	break;
		602
		603	case EIO_NOP:
		604	case EIO_BUSY:
		605	break;
		606
		607	case EIO_READLINK:
		608	case EIO_REALPATH:
		609	if (req->result > 0)
		610	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		611	break;
		612
		613	case EIO_STAT:
		614	case EIO_LSTAT:
		615	case EIO_FSTAT:
		616	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		617	PL_laststatval = req->result;
		618	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		619	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		620	PUSHs (sv_result);
		621	break;
		622
		623	case EIO_READ:
		624	{
		625	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		626	*SvEND (req->sv2) = 0;
		627	SvPOK_only (req->sv2);
		628	SvSETMAGIC (req->sv2);
		629	PUSHs (sv_result);
		630	}
		631	break;
		632
		633	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		634	if (req->result > 0)
		635	SvIV_set (sv_result, 0);
		636	/* FALLTHROUGH */
		637
		638	default:
		639	PUSHs (sv_result);
		640	break;
		641	}
		642
		643	errno = req->errorno;
		644
		645	PUTBACK;
		646	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		647	SPAGAIN;
		648
		649	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		650	SvREFCNT_dec (sv_result);
		651	else
		652	sv_result_cache = sv_result;
		653
		654	FREETMPS;
		655	LEAVE;
		656
		657	PUTBACK;
592	}	658	}
593	while (type != REQ_QUIT);	659
		660	return !!SvTRUE (ERRSV);
		661	}
		662
		663	static void req_destroy (aio_req req)
		664	{
		665	if (req->self)
		666	{
		667	sv_unmagic (req->self, PERL_MAGIC_ext);
		668	SvREFCNT_dec (req->self);
		669	}
		670
		671	SvREFCNT_dec (req->sv1);
		672	SvREFCNT_dec (req->sv2);
		673	SvREFCNT_dec (req->sv3);
		674	SvREFCNT_dec (req->sv4);
		675	SvREFCNT_dec (req->callback);
		676
		677	Safefree (req);
		678	}
		679
		680	static void req_cancel_subs (aio_req grp)
		681	{
		682	if (grp->type != EIO_GROUP)
		683	return;
		684
		685	SvREFCNT_dec (grp->sv2);
		686	grp->sv2 = 0;
		687
		688	eio_grp_cancel (grp);
		689	}
		690
		691	static void create_respipe (void)
		692	{
		693	if (s_epipe_renew (&respipe))
		694	croak ("IO::AIO: unable to initialize result pipe");
		695	}
		696
		697	static void poll_wait (void)
		698	{
		699	while (eio_nreqs ())
		700	{
		701	int size;
		702
		703	X_LOCK (reslock);
		704	size = res_queue.size;
		705	X_UNLOCK (reslock);
		706
		707	if (size)
		708	return;
		709
		710	etp_maybe_start_thread ();
		711
		712	s_epipe_wait (&respipe);
		713	}
		714	}
		715
		716	static int poll_cb (void)
		717	{
		718	for (;;)
		719	{
		720	int res = eio_poll ();
		721
		722	if (res > 0)
		723	croak (0);
		724
		725	if (!max_outstanding || max_outstanding > eio_nreqs ())
		726	return res;
		727
		728	poll_wait ();
		729	}
		730	}
		731
		732	static void ecb_cold
		733	reinit (void)
		734	{
		735	create_respipe ();
		736
		737	if (eio_init (want_poll, done_poll) < 0)
		738	croak ("IO::AIO: unable to initialise eio library");
		739	}
		740
		741	/*****************************************************************************/
		742
		743	#if !_POSIX_MAPPED_FILES
		744	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		745	# define munmap(addr,length) (errno = ENOSYS, -1)
		746	#endif
		747
		748	#if !_POSIX_MEMORY_PROTECTION
		749	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		750	# define PROT_NONE 0
		751	# define PROT_WRITE 0
		752	# define MAP_PRIVATE 0
		753	# define MAP_SHARED 0
		754	# define MAP_FIXED 0
		755	#endif
		756
		757	#define MMAP_MAGIC PERL_MAGIC_ext
		758
		759	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		760	{
		761	int old_errno = errno;
		762	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		763	errno = old_errno;
		764
		765	mg->mg_obj = 0; /* just in case */
		766
		767	SvREADONLY_off (sv);
		768
		769	if (SvPVX (sv) != mg->mg_ptr)
		770	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		771
		772	SvCUR_set (sv, 0);
		773	SvPVX (sv) = 0;
		774	SvOK_off (sv);
594		775
595	return 0;	776	return 0;
596	}	777	}
597		778
		779	static MGVTBL mmap_vtbl = {
		780	0, 0, 0, 0, mmap_free
		781	};
		782
		783	/*****************************************************************************/
		784
		785	static SV * get_cb (SV *cb_sv)
		786	{
		787	SvGETMAGIC (cb_sv);
		788	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		789	}
		790
598	#define dREQ \	791	#define dREQ \
		792	SV *cb_cv; \
599	aio_req req; \	793	aio_req req; \
		794	int req_pri = next_pri; \
		795	next_pri = EIO_PRI_DEFAULT; \
600	\	796	\
601	if (SvOK (callback) && !SvROK (callback)) \	797	cb_cv = get_cb (callback); \
602	croak ("clalback must be undef or of reference type"); \
603	\	798	\
604	Newz (0, req, 1, aio_cb); \	799	Newz (0, req, 1, eio_req); \
605	if (!req) \	800	if (!req) \
606	croak ("out of memory during aio_req allocation"); \	801	croak ("out of memory during eio_req allocation"); \
607	\	802	\
608	req->callback = newSVsv (callback);	803	req->callback = SvREFCNT_inc (cb_cv); \
609		804	req->pri = req_pri
		805
		806	#define REQ_SEND \
		807	PUTBACK; \
		808	req_submit (req); \
		809	SPAGAIN; \
		810	\
		811	if (GIMME_V != G_VOID) \
		812	XPUSHs (req_sv (req, aio_req_stash));
		813
		814	static void
		815	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		816	{
		817	if (SvROK (path))
		818	{
		819	AV *av = (AV *)SvRV (path);
		820	SV *wdob;
		821
		822	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		823	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		824
		825	path = AvARRAY (av)[1];
		826	wdob = AvARRAY (av)[0];
		827
		828	*wd = SvAIO_WD (wdob);
		829	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		830	}
		831
		832	*pathsv = newSVsv (path);
		833	*ptr = SvPVbyte_nolen (*pathsv);
		834	}
		835
		836	static void
		837	req_set_path1 (aio_req req, SV *path)
		838	{
		839	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		840	}
		841
		842	static void
		843	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		844	{
		845	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		846
		847	switch (SvTYPE (rv))
		848	{
		849	case SVt_PVIO:
		850	case SVt_PVLV:
		851	case SVt_PVGV:
		852	req->type = type_fh;
		853	req->sv1 = newSVsv (fh_or_path);
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	break;
		856
		857	default:
		858	req->type = type_path;
		859	req_set_path1 (req, fh_or_path);
		860	break;
		861	}
		862
		863	}
		864
610	MODULE = IO::AIO PACKAGE = IO::AIO	865	MODULE = IO::AIO PACKAGE = IO::AIO
611		866
612	PROTOTYPES: ENABLE	867	PROTOTYPES: ENABLE
613		868
614	BOOT:	869	BOOT:
615	{	870	{
616	create_pipe ();	871	static const struct {
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	872	const char *name;
618	}	873	IV iv;
		874	} *civ, const_iv[] = {
		875	# define const_niv(name, value) { # name, (IV) value },
		876	# define const_iv(name) { # name, (IV) name },
		877	# define const_eio(name) { # name, (IV) EIO_ ## name },
		878	const_iv (EXDEV)
		879	const_iv (ENOSYS)
		880	const_iv (O_RDONLY)
		881	const_iv (O_WRONLY)
		882	const_iv (O_RDWR)
		883	const_iv (O_CREAT)
		884	const_iv (O_TRUNC)
		885	const_iv (O_EXCL)
		886	const_iv (O_APPEND)
619		887
		888	const_iv (O_ASYNC)
		889	const_iv (O_DIRECT)
		890	const_iv (O_NOATIME)
		891
		892	const_iv (O_CLOEXEC)
		893	const_iv (O_NOCTTY)
		894	const_iv (O_NOFOLLOW)
		895	const_iv (O_NONBLOCK)
		896	const_iv (O_EXEC)
		897	const_iv (O_SEARCH)
		898	const_iv (O_DIRECTORY)
		899	const_iv (O_DSYNC)
		900	const_iv (O_RSYNC)
		901	const_iv (O_SYNC)
		902	const_iv (O_TTY_INIT)
		903
		904	const_iv (S_IFIFO)
		905	const_iv (S_IFCHR)
		906	const_iv (S_IFBLK)
		907	const_iv (S_IFLNK)
		908	const_iv (S_IFREG)
		909	const_iv (S_IFDIR)
		910	const_iv (S_IFWHT)
		911	const_iv (S_IFSOCK)
		912	const_iv (S_IFMT)
		913
		914	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		915	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		916	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		917	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		918	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		919	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		920
		921	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		922	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		923	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		924	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		925	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		926
		927	const_iv (ST_RDONLY)
		928	const_iv (ST_NOSUID)
		929	const_iv (ST_NODEV)
		930	const_iv (ST_NOEXEC)
		931	const_iv (ST_SYNCHRONOUS)
		932	const_iv (ST_MANDLOCK)
		933	const_iv (ST_WRITE)
		934	const_iv (ST_APPEND)
		935	const_iv (ST_IMMUTABLE)
		936	const_iv (ST_NOATIME)
		937	const_iv (ST_NODIRATIME)
		938	const_iv (ST_RELATIME)
		939
		940	const_iv (PROT_NONE)
		941	const_iv (PROT_EXEC)
		942	const_iv (PROT_READ)
		943	const_iv (PROT_WRITE)
		944
		945	/*const_iv (MAP_FIXED)*/
		946	const_iv (MAP_PRIVATE)
		947	const_iv (MAP_SHARED)
		948	const_iv (MAP_ANONYMOUS)
		949
		950	/* linuxish */
		951	const_iv (MAP_HUGETLB)
		952	const_iv (MAP_LOCKED)
		953	const_iv (MAP_NORESERVE)
		954	const_iv (MAP_POPULATE)
		955	const_iv (MAP_NONBLOCK)
		956
		957	const_eio (MCL_FUTURE)
		958	const_eio (MCL_CURRENT)
		959
		960	const_eio (MS_ASYNC)
		961	const_eio (MS_INVALIDATE)
		962	const_eio (MS_SYNC)
		963
		964	const_eio (MT_MODIFY)
		965
		966	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		967	const_eio (SYNC_FILE_RANGE_WRITE)
		968	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		969
		970	const_eio (FALLOC_FL_KEEP_SIZE)
		971
		972	const_eio (READDIR_DENTS)
		973	const_eio (READDIR_DIRS_FIRST)
		974	const_eio (READDIR_STAT_ORDER)
		975	const_eio (READDIR_FOUND_UNKNOWN)
		976
		977	const_eio (DT_UNKNOWN)
		978	const_eio (DT_FIFO)
		979	const_eio (DT_CHR)
		980	const_eio (DT_DIR)
		981	const_eio (DT_BLK)
		982	const_eio (DT_REG)
		983	const_eio (DT_LNK)
		984	const_eio (DT_SOCK)
		985	const_eio (DT_WHT)
		986	};
		987
		988	aio_stash = gv_stashpv ("IO::AIO" , 1);
		989	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		990	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		991	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		992
		993	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		994	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		995
		996	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		997
		998	reinit ();
		999	}
		1000
620	void	1001	void
621	min_parallel(nthreads)	1002	reinit ()
622	int nthreads	1003	PROTOTYPE:
		1004
		1005	void
		1006	max_poll_reqs (unsigned int nreqs)
623	PROTOTYPE: $	1007	PROTOTYPE: $
		1008	CODE:
		1009	eio_set_max_poll_reqs (nreqs);
624		1010
625	void	1011	void
626	max_parallel(nthreads)	1012	max_poll_time (double nseconds)
627	int nthreads
628	PROTOTYPE: $	1013	PROTOTYPE: $
629
630	int
631	max_outstanding(nreqs)
632	int nreqs
633	PROTOTYPE: $
634	CODE:	1014	CODE:
635	RETVAL = max_outstanding;	1015	eio_set_max_poll_time (nseconds);
		1016
		1017	void
		1018	min_parallel (unsigned int nthreads)
		1019	PROTOTYPE: $
		1020	CODE:
		1021	eio_set_min_parallel (nthreads);
		1022
		1023	void
		1024	max_parallel (unsigned int nthreads)
		1025	PROTOTYPE: $
		1026	CODE:
		1027	eio_set_max_parallel (nthreads);
		1028
		1029	void
		1030	max_idle (unsigned int nthreads)
		1031	PROTOTYPE: $
		1032	CODE:
		1033	eio_set_max_idle (nthreads);
		1034
		1035	void
		1036	idle_timeout (unsigned int seconds)
		1037	PROTOTYPE: $
		1038	CODE:
		1039	eio_set_idle_timeout (seconds);
		1040
		1041	void
		1042	max_outstanding (unsigned int maxreqs)
		1043	PROTOTYPE: $
		1044	CODE:
636	max_outstanding = nreqs;	1045	max_outstanding = maxreqs;
637		1046
638	void	1047	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1048	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
640	SV * pathname
641	int flags
642	int mode
643	SV * callback
644	PROTOTYPE: $$$;$
645	CODE:	1049	PPCODE:
646	{	1050	{
647	dREQ;	1051	dREQ;
648		1052
		1053	req->type = EIO_WD_OPEN;
		1054	req_set_path1 (req, pathname);
		1055
		1056	REQ_SEND;
		1057	}
		1058
		1059	void
		1060	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	dREQ;
		1064
649	req->type = REQ_OPEN;	1065	req->type = EIO_OPEN;
650	req->data = newSVsv (pathname);	1066	req_set_path1 (req, pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);
652	req->fd = flags;	1067	req->int1 = flags;
653	req->mode = mode;	1068	req->int2 = mode;
654		1069
655	send_req (req);	1070	REQ_SEND;
656	}	1071	}
657		1072
658	void	1073	void
659	aio_close(fh,callback=&PL_sv_undef)	1074	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
660	SV * fh
661	SV * callback
662	PROTOTYPE: $;$
663	ALIAS:	1075	ALIAS:
664	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	1076	aio_fsync = EIO_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	1077	aio_fdatasync = EIO_FDATASYNC
		1078	aio_syncfs = EIO_SYNCFS
667	CODE:	1079	PPCODE:
668	{	1080	{
		1081	int fd = s_fileno_croak (fh, 0);
669	dREQ;	1082	dREQ;
670		1083
671	req->type = ix;	1084	req->type = ix;
672	req->fh = newSVsv (fh);	1085	req->sv1 = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1086	req->int1 = fd;
674		1087
675	send_req (req);	1088	REQ_SEND (req);
676	}	1089	}
677		1090
678	void	1091	void
		1092	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1093	PPCODE:
		1094	{
		1095	int fd = s_fileno_croak (fh, 0);
		1096	dREQ;
		1097
		1098	req->type = EIO_SYNC_FILE_RANGE;
		1099	req->sv1 = newSVsv (fh);
		1100	req->int1 = fd;
		1101	req->offs = offset;
		1102	req->size = nbytes;
		1103	req->int2 = flags;
		1104
		1105	REQ_SEND (req);
		1106	}
		1107
		1108	void
		1109	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1110	PPCODE:
		1111	{
		1112	int fd = s_fileno_croak (fh, 0);
		1113	dREQ;
		1114
		1115	req->type = EIO_FALLOCATE;
		1116	req->sv1 = newSVsv (fh);
		1117	req->int1 = fd;
		1118	req->int2 = mode;
		1119	req->offs = offset;
		1120	req->size = len;
		1121
		1122	REQ_SEND (req);
		1123	}
		1124
		1125	void
		1126	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1127	PPCODE:
		1128	{
		1129	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1130	int fd = s_fileno_croak (fh, 0);
		1131	dREQ;
		1132
		1133	if (expect_false (close_fd < 0))
		1134	{
		1135	int pipefd [2];
		1136
		1137	if (
		1138	#ifdef _WIN32
		1139	_pipe (pipefd, 1, _O_BINARY) < 0
		1140	#else
		1141	pipe (pipefd) < 0
		1142	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1143	#endif
		1144	|| close (pipefd [1]) < 0
		1145	)
		1146	abort (); /*D*/
		1147
		1148	close_fd = pipefd [0];
		1149	}
		1150
		1151	req->type = EIO_DUP2;
		1152	req->int1 = close_fd;
		1153	req->sv2 = newSVsv (fh);
		1154	req->int2 = fd;
		1155
		1156	REQ_SEND (req);
		1157	}
		1158
		1159	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1160	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
680	SV * fh
681	UV offset
682	UV length
683	SV * data
684	UV dataoffset
685	SV * callback
686	ALIAS:	1161	ALIAS:
687	aio_read = REQ_READ	1162	aio_read = EIO_READ
688	aio_write = REQ_WRITE	1163	aio_write = EIO_WRITE
689	PROTOTYPE: $$$$$;$
690	CODE:	1164	PPCODE:
691	{	1165	{
692	aio_req req;
693	STRLEN svlen;	1166	STRLEN svlen;
		1167	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
694	char *svptr = SvPVbyte (data, svlen);	1168	char *svptr = SvPVbyte (data, svlen);
695		1169	UV len = SvUV (length);
696	SvUPGRADE (data, SVt_PV);
697	SvPOK_on (data);
698		1170
699	if (dataoffset < 0)	1171	if (dataoffset < 0)
700	dataoffset += svlen;	1172	dataoffset += svlen;
701		1173
702	if (dataoffset < 0 || dataoffset > svlen)	1174	if (dataoffset < 0 || dataoffset > svlen)
703	croak ("data offset outside of string");	1175	croak ("dataoffset outside of data scalar");
704		1176
705	if (ix == REQ_WRITE)	1177	if (ix == EIO_WRITE)
706	{	1178	{
707	/* write: check length and adjust. */	1179	/* write: check length and adjust. */
708	if (length < 0 || length + dataoffset > svlen)	1180	if (!SvOK (length) || len + dataoffset > svlen)
709	length = svlen - dataoffset;	1181	len = svlen - dataoffset;
710	}	1182	}
711	else	1183	else
712	{	1184	{
713	/* read: grow scalar as necessary */	1185	/* read: check type and grow scalar as necessary */
		1186	SvUPGRADE (data, SVt_PV);
714	svptr = SvGROW (data, length + dataoffset);	1187	svptr = SvGROW (data, len + dataoffset + 1);
715	}	1188	}
716
717	if (length < 0)
718	croak ("length must not be negative");
719		1189
720	{	1190	{
721	dREQ;	1191	dREQ;
722		1192
723	req->type = ix;	1193	req->type = ix;
724	req->fh = newSVsv (fh);	1194	req->sv1 = newSVsv (fh);
725	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1195	req->int1 = fd;
726	: IoOFP (sv_2io (fh)));	1196	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
727	req->offset = offset;	1197	req->size = len;
728	req->length = length;
729	req->data = SvREFCNT_inc (data);	1198	req->sv2 = SvREFCNT_inc (data);
730	req->dataptr = (char *)svptr + dataoffset;	1199	req->ptr2 = (char *)svptr + dataoffset;
		1200	req->stroffset = dataoffset;
731		1201
732	if (!SvREADONLY (data))	1202	if (!SvREADONLY (data))
733	{	1203	{
734	SvREADONLY_on (data);	1204	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1205	req->flags |= FLAG_SV2_RO_OFF;
736	}	1206	}
737		1207
738	send_req (req);	1208	REQ_SEND;
739	}	1209	}
740	}	1210	}
741		1211
742	void	1212	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1213	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
744	SV * out_fh	1214	ALIAS:
745	SV * in_fh	1215	aio_readlink = EIO_READLINK
746	UV in_offset	1216	aio_realpath = EIO_REALPATH
747	UV length
748	SV * callback
749	PROTOTYPE: $$$$;$
750	CODE:	1217	PPCODE:
751	{	1218	{
		1219	dREQ;
		1220
		1221	req->type = ix;
		1222	req_set_path1 (req, pathname);
		1223
		1224	REQ_SEND;
		1225	}
		1226
		1227	void
		1228	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1229	PPCODE:
		1230	{
		1231	int ifd = s_fileno_croak (in_fh , 0);
		1232	int ofd = s_fileno_croak (out_fh, 1);
752	dREQ;	1233	dREQ;
753		1234
754	req->type = REQ_SENDFILE;	1235	req->type = EIO_SENDFILE;
755	req->fh = newSVsv (out_fh);	1236	req->sv1 = newSVsv (out_fh);
756	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1237	req->int1 = ofd;
757	req->fh2 = newSVsv (in_fh);	1238	req->sv2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1239	req->int2 = ifd;
759	req->offset = in_offset;	1240	req->offs = in_offset;
760	req->length = length;	1241	req->size = length;
761		1242
762	send_req (req);	1243	REQ_SEND;
763	}	1244	}
764		1245
765	void	1246	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1247	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
767	SV * fh
768	UV offset
769	IV length
770	SV * callback
771	PROTOTYPE: $$$;$
772	CODE:	1248	PPCODE:
773	{	1249	{
		1250	int fd = s_fileno_croak (fh, 0);
774	dREQ;	1251	dREQ;
775		1252
776	req->type = REQ_READAHEAD;	1253	req->type = EIO_READAHEAD;
777	req->fh = newSVsv (fh);	1254	req->sv1 = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1255	req->int1 = fd;
779	req->offset = offset;	1256	req->offs = offset;
780	req->length = length;	1257	req->size = length;
781		1258
782	send_req (req);	1259	REQ_SEND;
783	}	1260	}
784		1261
785	void	1262	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	1263	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
787	SV * fh_or_path
788	SV * callback
789	ALIAS:	1264	ALIAS:
790	aio_stat = REQ_STAT	1265	aio_stat = EIO_STAT
791	aio_lstat = REQ_LSTAT	1266	aio_lstat = EIO_LSTAT
		1267	aio_statvfs = EIO_STATVFS
792	CODE:	1268	PPCODE:
793	{	1269	{
794	dREQ;	1270	dREQ;
795		1271
796	New (0, req->statdata, 1, Stat_t);
797	if (!req->statdata)
798	{
799	free_req (req);
800	croak ("out of memory during aio_req->statdata allocation");
801	}
802
803	if (SvPOK (fh_or_path))
804	{
805	req->type = ix;
806	req->data = newSVsv (fh_or_path);
807	req->dataptr = SvPVbyte_nolen (req->data);
808	}
809	else
810	{
811	req->type = REQ_FSTAT;
812	req->fh = newSVsv (fh_or_path);	1272	req->sv1 = newSVsv (fh_or_path);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1273	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
814	}	1274	REQ_SEND;
815
816	send_req (req);
817	}	1275	}
818		1276
		1277	UV
		1278	major (UV dev)
		1279	ALIAS:
		1280	minor = 1
		1281	CODE:
		1282	RETVAL = ix ? major (dev) : minor (dev);
		1283	OUTPUT:
		1284	RETVAL
		1285
		1286	UV
		1287	makedev (UV maj, UV min)
		1288	CODE:
		1289	RETVAL = makedev (maj, min);
		1290	OUTPUT:
		1291	RETVAL
		1292
819	void	1293	void
		1294	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1300	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1301	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1302
		1303	REQ_SEND;
		1304	}
		1305
		1306	void
		1307	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1308	PPCODE:
		1309	{
		1310	dREQ;
		1311
		1312	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1313	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1314
		1315	REQ_SEND;
		1316	}
		1317
		1318	void
		1319	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1320	ALIAS:
		1321	aio_chmod = EIO_CHMOD
		1322	aio_mkdir = EIO_MKDIR
		1323	PPCODE:
		1324	{
		1325	dREQ;
		1326
		1327	req->int2 = mode;
		1328	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1329
		1330	REQ_SEND;
		1331	}
		1332
		1333	void
		1334	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1335	PPCODE:
		1336	{
		1337	dREQ;
		1338
		1339	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1340	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1341	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1342
		1343	REQ_SEND;
		1344	}
		1345
		1346	void
		1347	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1348	PPCODE:
		1349	{
		1350	dREQ;
		1351
		1352	req->type = EIO_READDIR;
		1353	req->sv1 = newSVsv (pathname);
		1354	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1355	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1356
		1357	if (flags & EIO_READDIR_DENTS)
		1358	req->int1 |= EIO_READDIR_CUSTOM2;
		1359
		1360	REQ_SEND;
		1361	}
		1362
		1363	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1364	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
821	SV * pathname
822	SV * callback
823	ALIAS:	1365	ALIAS:
824	aio_unlink = REQ_UNLINK	1366	aio_unlink = EIO_UNLINK
825	aio_rmdir = REQ_RMDIR	1367	aio_rmdir = EIO_RMDIR
		1368	aio_readdir = EIO_READDIR
826	CODE:	1369	PPCODE:
827	{	1370	{
828	dREQ;	1371	dREQ;
829		1372
830	req->type = ix;	1373	req->type = ix;
831	req->data = newSVsv (pathname);	1374	req_set_path1 (req, pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);	1375
		1376	REQ_SEND;
		1377	}
		1378
		1379	void
		1380	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1381	ALIAS:
		1382	aio_link = EIO_LINK
		1383	aio_symlink = EIO_SYMLINK
		1384	aio_rename = EIO_RENAME
		1385	PPCODE:
		1386	{
		1387	dREQ;
		1388	eio_wd wd2;
833		1389
834	send_req (req);	1390	req->type = ix;
		1391	req_set_path1 (req, oldpath);
		1392	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1393	req->int3 = (long)wd2;
		1394
		1395	REQ_SEND;
835	}	1396	}
836		1397
837	void	1398	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1399	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
839	SV * oldpath
840	SV * newpath
841	SV * callback
842	CODE:	1400	PPCODE:
843	{	1401	{
844	dREQ;	1402	dREQ;
845		1403
846	req->type = REQ_SYMLINK;	1404	req->type = EIO_MKNOD;
847	req->fh = newSVsv (oldpath);	1405	req->int2 = (mode_t)mode;
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1406	req->offs = dev;
849	req->data = newSVsv (newpath);	1407	req_set_path1 (req, pathname);
850	req->dataptr = SvPVbyte_nolen (req->data);
851		1408
852	send_req (req);	1409	REQ_SEND;
853	}	1410	}
854		1411
855	void	1412	void
		1413	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1414	ALIAS:
		1415	aio_mtouch = EIO_MTOUCH
		1416	aio_msync = EIO_MSYNC
		1417	PPCODE:
		1418	{
		1419	STRLEN svlen;
		1420	char *svptr = SvPVbyte (data, svlen);
		1421	UV len = SvUV (length);
		1422
		1423	if (offset < 0)
		1424	offset += svlen;
		1425
		1426	if (offset < 0 || offset > svlen)
		1427	croak ("offset outside of scalar");
		1428
		1429	if (!SvOK (length) || len + offset > svlen)
		1430	len = svlen - offset;
		1431
		1432	{
		1433	dREQ;
		1434
		1435	req->type = ix;
		1436	req->sv2 = SvREFCNT_inc (data);
		1437	req->ptr2 = (char *)svptr + offset;
		1438	req->size = len;
		1439	req->int1 = flags;
		1440
		1441	REQ_SEND;
		1442	}
		1443	}
		1444
		1445	void
		1446	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1447	PPCODE:
		1448	{
		1449	STRLEN svlen;
		1450	char *svptr = SvPVbyte (data, svlen);
		1451	UV len = SvUV (length);
		1452
		1453	if (offset < 0)
		1454	offset += svlen;
		1455
		1456	if (offset < 0 || offset > svlen)
		1457	croak ("offset outside of scalar");
		1458
		1459	if (!SvOK (length) || len + offset > svlen)
		1460	len = svlen - offset;
		1461
		1462	{
		1463	dREQ;
		1464
		1465	req->type = EIO_MLOCK;
		1466	req->sv2 = SvREFCNT_inc (data);
		1467	req->ptr2 = (char *)svptr + offset;
		1468	req->size = len;
		1469
		1470	REQ_SEND;
		1471	}
		1472	}
		1473
		1474	void
		1475	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1476	PPCODE:
		1477	{
		1478	dREQ;
		1479
		1480	req->type = EIO_MLOCKALL;
		1481	req->int1 = flags;
		1482
		1483	REQ_SEND;
		1484	}
		1485
		1486	void
		1487	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1488	PPCODE:
		1489	{
		1490	dREQ;
		1491
		1492	req->type = EIO_BUSY;
		1493	req->nv1 = delay < 0. ? 0. : delay;
		1494
		1495	REQ_SEND;
		1496	}
		1497
		1498	void
		1499	aio_group (SV *callback=&PL_sv_undef)
		1500	PPCODE:
		1501	{
		1502	dREQ;
		1503
		1504	req->type = EIO_GROUP;
		1505
		1506	req_submit (req);
		1507	XPUSHs (req_sv (req, aio_grp_stash));
		1508	}
		1509
		1510	void
		1511	aio_nop (SV *callback=&PL_sv_undef)
		1512	ALIAS:
		1513	aio_nop = EIO_NOP
		1514	aio_sync = EIO_SYNC
		1515	PPCODE:
		1516	{
		1517	dREQ;
		1518
		1519	req->type = ix;
		1520
		1521	REQ_SEND;
		1522	}
		1523
		1524	int
		1525	aioreq_pri (int pri = 0)
		1526	CODE:
		1527	RETVAL = next_pri;
		1528	if (items > 0)
		1529	{
		1530	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1531	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1532	next_pri = pri;
		1533	}
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	void
		1538	aioreq_nice (int nice = 0)
		1539	CODE:
		1540	nice = next_pri - nice;
		1541	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1542	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1543	next_pri = nice;
		1544
		1545	void
856	flush()	1546	flush ()
857	PROTOTYPE:
858	CODE:	1547	CODE:
859	while (nreqs)	1548	while (eio_nreqs ())
860	{	1549	{
861	poll_wait ();	1550	poll_wait ();
862	poll_cb ();	1551	poll_cb ();
863	}	1552	}
864		1553
865	void
866	poll()
867	PROTOTYPE:
868	CODE:
869	if (nreqs)
870	{
871	poll_wait ();
872	poll_cb ();
873	}
874
875	int	1554	int
876	poll_fileno()	1555	poll ()
877	PROTOTYPE:
878	CODE:	1556	CODE:
879	RETVAL = respipe [0];	1557	poll_wait ();
880	OUTPUT:
881	RETVAL
882
883	int
884	poll_cb(...)
885	PROTOTYPE:
886	CODE:
887	RETVAL = poll_cb ();	1558	RETVAL = poll_cb ();
888	OUTPUT:	1559	OUTPUT:
889	RETVAL	1560	RETVAL
890		1561
891	void
892	poll_wait()
893	PROTOTYPE:
894	CODE:
895	if (nreqs)
896	poll_wait ();
897
898	int	1562	int
899	nreqs()	1563	poll_fileno ()
900	PROTOTYPE:
901	CODE:	1564	CODE:
902	RETVAL = nreqs;	1565	RETVAL = s_epipe_fd (&respipe);
903	OUTPUT:	1566	OUTPUT:
904	RETVAL	1567	RETVAL
905		1568
		1569	int
		1570	poll_cb (...)
		1571	PROTOTYPE:
		1572	CODE:
		1573	RETVAL = poll_cb ();
		1574	OUTPUT:
		1575	RETVAL
		1576
		1577	void
		1578	poll_wait ()
		1579	CODE:
		1580	poll_wait ();
		1581
		1582	int
		1583	nreqs ()
		1584	CODE:
		1585	RETVAL = eio_nreqs ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	nready ()
		1591	CODE:
		1592	RETVAL = eio_nready ();
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	npending ()
		1598	CODE:
		1599	RETVAL = eio_npending ();
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	nthreads ()
		1605	CODE:
		1606	RETVAL = eio_nthreads ();
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	int
		1611	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1612	CODE:
		1613	RETVAL = posix_fadvise (fh, offset, length, advice);
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	IV
		1618	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1619	CODE:
		1620	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	void
		1625	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1626	PPCODE:
		1627	sv_unmagic (scalar, MMAP_MAGIC);
		1628	{
		1629	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1630	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1631	if (addr == (void *)-1)
		1632	XSRETURN_NO;
		1633
		1634	sv_force_normal (scalar);
		1635
		1636	/* we store the length in mg_obj, as namlen is I32 :/ */
		1637	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1638	->mg_obj = (SV *)length;
		1639
		1640	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1641
		1642	if (!(prot & PROT_WRITE))
		1643	SvREADONLY_on (scalar);
		1644
		1645	if (SvLEN (scalar))
		1646	Safefree (SvPVX (scalar));
		1647
		1648	SvPVX (scalar) = (char *)addr;
		1649	SvCUR_set (scalar, length);
		1650	SvLEN_set (scalar, 0);
		1651	SvPOK_only (scalar);
		1652
		1653	XSRETURN_YES;
		1654	}
		1655
		1656	void
		1657	munmap (SV *scalar)
		1658	CODE:
		1659	sv_unmagic (scalar, MMAP_MAGIC);
		1660
		1661	int
		1662	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1663	ALIAS:
		1664	mprotect = 1
		1665	CODE:
		1666	{
		1667	STRLEN svlen;
		1668	void *addr = SvPVbyte (scalar, svlen);
		1669	size_t len = SvUV (length);
		1670
		1671	if (offset < 0)
		1672	offset += svlen;
		1673
		1674	if (offset < 0 || offset > svlen)
		1675	croak ("offset outside of scalar");
		1676
		1677	if (!SvOK (length) || len + offset > svlen)
		1678	len = svlen - offset;
		1679
		1680	addr = (void *)(((intptr_t)addr) + offset);
		1681	eio_page_align (&addr, &len);
		1682
		1683	switch (ix)
		1684	{
		1685	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1686	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1687	}
		1688	}
		1689	OUTPUT:
		1690	RETVAL
		1691
		1692	int
		1693	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1694	CODE:
		1695	{
		1696	STRLEN svlen;
		1697	void *addr = SvPVbyte (scalar, svlen);
		1698	size_t len = SvUV (length);
		1699
		1700	if (offset < 0)
		1701	offset += svlen;
		1702
		1703	if (offset < 0 || offset > svlen)
		1704	croak ("offset outside of scalar");
		1705
		1706	if (!SvOK (length) || len + offset > svlen)
		1707	len = svlen - offset;
		1708
		1709	addr = (void *)(((intptr_t)addr) + offset);
		1710	eio_page_align (&addr, &len);
		1711	#if _POSIX_MEMLOCK_RANGE
		1712	RETVAL = munlock (addr, len);
		1713	#else
		1714	RETVAL = ((errno = ENOSYS), -1);
		1715	#endif
		1716	}
		1717	OUTPUT:
		1718	RETVAL
		1719
		1720	int
		1721	munlockall ()
		1722	CODE:
		1723	#if _POSIX_MEMLOCK
		1724	munlockall ();
		1725	#else
		1726	RETVAL = -1;
		1727	errno = ENOSYS;
		1728	#endif
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	void _on_next_submit (SV *cb)
		1733	CODE:
		1734	SvREFCNT_dec (on_next_submit);
		1735	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1736
		1737	PROTOTYPES: DISABLE
		1738
		1739	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1740
		1741	void
		1742	DESTROY (SV *self)
		1743	CODE:
		1744	{
		1745	aio_wd wd = SvAIO_WD (self);
		1746	#if HAVE_AT
		1747	SV *callback = &PL_sv_undef;
		1748	dREQ; /* clobbers next_pri :/ */
		1749	req->type = EIO_WD_CLOSE;
		1750	req->wd = wd;
		1751	REQ_SEND;
		1752	#else
		1753	eio_wd_close_sync (wd);
		1754	#endif
		1755	}
		1756
		1757	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1758
		1759	void
		1760	cancel (aio_req_ornot req)
		1761	CODE:
		1762	eio_cancel (req);
		1763
		1764	void
		1765	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1766	PPCODE:
		1767	{
		1768	if (GIMME_V != G_VOID)
		1769	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1770
		1771	if (items > 1)
		1772	{
		1773	SV *cb_cv =get_cb (callback);
		1774
		1775	SvREFCNT_dec (req->callback);
		1776	req->callback = SvREFCNT_inc (cb_cv);
		1777	}
		1778	}
		1779
		1780	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1781
		1782	void
		1783	add (aio_req grp, ...)
		1784	PPCODE:
		1785	{
		1786	int i;
		1787
		1788	if (grp->int1 == 2)
		1789	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1790
		1791	for (i = 1; i < items; ++i )
		1792	{
		1793	aio_req req;
		1794
		1795	if (GIMME_V != G_VOID)
		1796	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1797
		1798	req = SvAIO_REQ (ST (i));
		1799
		1800	if (req)
		1801	eio_grp_add (grp, req);
		1802	}
		1803	}
		1804
		1805	void
		1806	cancel_subs (aio_req_ornot req)
		1807	CODE:
		1808	req_cancel_subs (req);
		1809
		1810	void
		1811	result (aio_req grp, ...)
		1812	CODE:
		1813	{
		1814	int i;
		1815	AV *av;
		1816
		1817	grp->errorno = errno;
		1818
		1819	av = newAV ();
		1820	av_extend (av, items - 1);
		1821
		1822	for (i = 1; i < items; ++i )
		1823	av_push (av, newSVsv (ST (i)));
		1824
		1825	SvREFCNT_dec (grp->sv1);
		1826	grp->sv1 = (SV *)av;
		1827	}
		1828
		1829	void
		1830	errno (aio_req grp, int errorno = errno)
		1831	CODE:
		1832	grp->errorno = errorno;
		1833
		1834	void
		1835	limit (aio_req grp, int limit)
		1836	CODE:
		1837	eio_grp_limit (grp, limit);
		1838
		1839	void
		1840	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1841	CODE:
		1842	{
		1843	SvREFCNT_dec (grp->sv2);
		1844	grp->sv2 = newSVsv (callback);
		1845	grp->feed = aio_grp_feed;
		1846
		1847	if (grp->int2 <= 0)
		1848	grp->int2 = 2;
		1849
		1850	eio_grp_limit (grp, grp->int2);
		1851	}
		1852

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