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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC vs.
Revision 1.208 by root, Sat Jan 7 18:42:43 2012 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
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12
13	#include <unistd.h>	16	#include <limits.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	18	#include <sched.h>
17		19
18	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
19		23
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* perl namespace pollution */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	#undef VERSION
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		26
24	#if __ia64	27	/* perl stupidly overrides readdir and maybe others */
25	# define STACKSIZE 65536	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	#define EIO_STRUCT_STAT struct _stati64
		68	#define EIO_STRUCT_STATI64
		69
26	#else	70	#else
27	# define STACKSIZE 4096	71
		72	#include <sys/time.h>
		73	#include <sys/select.h>
		74	#include <unistd.h>
		75	#include <utime.h>
		76	#include <signal.h>
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	#endif
		81
		82	/* use NV for 32 bit perls as it allows larger offsets */
		83	#if IVSIZE >= 8
		84	# define VAL64 IV
		85	# define SvVAL64 SvIV
		86	# define newSVval64 newSViv
		87	#else
		88	# define VAL64 NV
		89	# define SvVAL64 SvNV
		90	# define newSVval64 newSVnv
		91	#endif
		92
		93	/*****************************************************************************/
		94
		95	#if __GNUC__ >= 3
		96	# define expect(expr,value) __builtin_expect ((expr),(value))
		97	#else
		98	# define expect(expr,value) (expr)
		99	#endif
		100
		101	#define expect_false(expr) expect ((expr) != 0, 0)
		102	#define expect_true(expr) expect ((expr) != 0, 1)
		103
		104	/*****************************************************************************/
		105
		106	typedef SV SV8; /* byte-sv, used for argument-checking */
		107	typedef int aio_rfd; /* read file desriptor */
		108	typedef int aio_wfd; /* write file descriptor */
		109
		110	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	SV *sv3, *sv4; \
		116	STRLEN stroffset; \
		117	SV *self;
		118
		119	#define EIO_NO_WRAPPERS 1
		120
		121	#include "libeio/config.h"
		122	#include "libeio/eio.h"
		123
		124	static int req_invoke (eio_req *req);
		125	#define EIO_FINISH(req) req_invoke (req)
		126	static void req_destroy (eio_req *grp);
		127	#define EIO_DESTROY(req) req_destroy (req)
		128
		129	#include "libeio/eio.c"
		130
		131	/* Linux/others */
		132	#ifndef O_ASYNC
		133	# define O_ASYNC 0
		134	#endif
		135	#ifndef O_DIRECT
		136	# define O_DIRECT 0
		137	#endif
		138	#ifndef O_NOATIME
		139	# define O_NOATIME 0
		140	#endif
		141
		142	/* POSIX */
		143	#ifndef O_CLOEXEC
		144	# define O_CLOEXEC 0
		145	#endif
		146	#ifndef O_NOFOLLOW
		147	# define O_NOFOLLOW 0
		148	#endif
		149	#ifndef O_NOCTTY
		150	# define O_NOCTTY 0
		151	#endif
		152	#ifndef O_NONBLOCK
		153	# define O_NONBLOCK 0
		154	#endif
		155	#ifndef O_EXEC
		156	# define O_EXEC 0
		157	#endif
		158	#ifndef O_SEARCH
		159	# define O_SEARCH 0
		160	#endif
		161	#ifndef O_DIRECTORY
		162	# define O_DIRECTORY 0
		163	#endif
		164	#ifndef O_DSYNC
		165	# define O_DSYNC 0
		166	#endif
		167	#ifndef O_RSYNC
		168	# define O_RSYNC 0
		169	#endif
		170	#ifndef O_SYNC
		171	# define O_SYNC 0
		172	#endif
		173	#ifndef O_TTY_INIT
		174	# define O_TTY_INIT 0
		175	#endif
		176
		177	#ifndef POSIX_FADV_NORMAL
		178	# define POSIX_FADV_NORMAL 0
		179	#endif
		180	#ifndef POSIX_FADV_SEQUENTIAL
		181	# define POSIX_FADV_SEQUENTIAL 0
		182	#endif
		183	#ifndef POSIX_FADV_RANDOM
		184	# define POSIX_FADV_RANDOM 0
		185	#endif
		186	#ifndef POSIX_FADV_NOREUSE
		187	# define POSIX_FADV_NOREUSE 0
		188	#endif
		189	#ifndef POSIX_FADV_WILLNEED
		190	# define POSIX_FADV_WILLNEED 0
		191	#endif
		192	#ifndef POSIX_FADV_DONTNEED
		193	# define POSIX_FADV_DONTNEED 0
		194	#endif
		195
		196	#if !HAVE_POSIX_FADVISE
		197	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#ifndef POSIX_MADV_NORMAL
		201	# define POSIX_MADV_NORMAL 0
		202	#endif
		203	#ifndef POSIX_MADV_SEQUENTIAL
		204	# define POSIX_MADV_SEQUENTIAL 0
		205	#endif
		206	#ifndef POSIX_MADV_RANDOM
		207	# define POSIX_MADV_RANDOM 0
		208	#endif
		209	#ifndef POSIX_MADV_WILLNEED
		210	# define POSIX_MADV_WILLNEED 0
		211	#endif
		212	#ifndef POSIX_MADV_DONTNEED
		213	# define POSIX_MADV_DONTNEED 0
		214	#endif
		215
		216	#if !HAVE_POSIX_MADVISE
		217	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		218	#endif
		219
		220	#ifndef PROT_NONE
		221	# define PROT_NONE 0
		222	#endif
		223	#ifndef PROT_READ
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_WRITE
		227	# define PROT_READ 0
		228	#endif
		229	#ifndef PROT_EXEC
		230	# define PROT_EXEC 0
		231	#endif
		232
		233	#ifndef ST_RDONLY
		234	# define ST_RDONLY 0
		235	#endif
		236	#ifndef ST_NOSUID
		237	# define ST_NOSUID 0
		238	#endif
		239	#ifndef ST_NODEV
		240	# define ST_NODEV 0
		241	#endif
		242	#ifndef ST_NOEXEC
		243	# define ST_NOEXEC 0
		244	#endif
		245	#ifndef ST_SYNCHRONOUS
		246	# define ST_SYNCHRONOUS 0
		247	#endif
		248	#ifndef ST_MANDLOCK
		249	# define ST_MANDLOCK 0
		250	#endif
		251	#ifndef ST_WRITE
		252	# define ST_WRITE 0
		253	#endif
		254	#ifndef ST_APPEND
		255	# define ST_APPEND 0
		256	#endif
		257	#ifndef ST_IMMUTABLE
		258	# define ST_IMMUTABLE 0
		259	#endif
		260	#ifndef ST_NOATIME
		261	# define ST_NOATIME 0
		262	#endif
		263	#ifndef ST_NODIRATIME
		264	# define ST_NODIRATIME 0
		265	#endif
		266	#ifndef ST_RELATIME
		267	# define ST_RELATIME 0
		268	#endif
		269
		270	#ifndef S_IFIFO
		271	# define S_IFIFO 0
		272	#endif
		273	#ifndef S_IFCHR
		274	# define S_IFCHR 0
		275	#endif
		276	#ifndef S_IFBLK
		277	# define S_IFBLK 0
		278	#endif
		279	#ifndef S_IFLNK
		280	# define S_IFLNK 0
		281	#endif
		282	#ifndef S_IFREG
		283	# define S_IFREG 0
		284	#endif
		285	#ifndef S_IFDIR
		286	# define S_IFDIR 0
		287	#endif
		288	#ifndef S_IFWHT
		289	# define S_IFWHT 0
		290	#endif
		291	#ifndef S_IFSOCK
		292	# define S_IFSOCK 0
		293	#endif
		294
		295	#ifndef MAP_ANONYMOUS
		296	# ifdef MAP_ANON
		297	# define MAP_ANONYMOUS MAP_ANON
		298	# else
		299	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		300	# endif
		301	#endif
		302	#ifndef MAP_HUGETLB
		303	# define MAP_HUGETLB 0
		304	#endif
		305	#ifndef MAP_LOCKED
		306	# define MAP_LOCKED 0
		307	#endif
		308	#ifndef MAP_NORESERVE
		309	# define MAP_NORESERVE 0
		310	#endif
		311	#ifndef MAP_POPULATE
		312	# define MAP_POPULATE 0
		313	#endif
		314	#ifndef MAP_NONBLOCK
		315	# define MAP_NONBLOCK 0
		316	#endif
		317
		318	#ifndef makedev
		319	# define makedev(maj,min) (((maj) << 8) | (min))
		320	#endif
		321	#ifndef major
		322	# define major(dev) ((dev) >> 8)
		323	#endif
		324	#ifndef minor
		325	# define minor(dev) ((dev) & 0xff)
		326	#endif
		327
		328	#ifndef PAGESIZE
		329	# define PAGESIZE sysconf (_SC_PAGESIZE)
28	#endif	330	#endif
29		331
30	enum {	332	enum {
31	REQ_QUIT,	333	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	334	};
39		335
40	typedef struct aio_cb {
41	struct aio_cb *volatile next;
42
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	336	typedef eio_req *aio_req;
		337	typedef eio_req *aio_req_ornot;
		338	typedef eio_wd aio_wd;
59		339
60	static int started;	340	static SV *on_next_submit;
61	static volatile int nreqs;	341	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	342	static int max_outstanding;
63	static int respipe [2];
64		343
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	344	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		345
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	346	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	347	static void req_cancel (aio_req req);
72		348
73	static void	349	static void
74	poll_wait ()	350	want_poll (void)
75	{	351	{
76	if (nreqs && !ress)	352	/* write a dummy byte to the pipe so fh becomes ready */
		353	s_epipe_signal (&respipe);
		354	}
		355
		356	static void
		357	done_poll (void)
		358	{
		359	/* read any signals sent by the worker threads */
		360	s_epipe_drain (&respipe);
		361	}
		362
		363	/* must be called at most once */
		364	static SV *
		365	req_sv (aio_req req, HV *stash)
		366	{
		367	if (!req->self)
77	{	368	{
78	fd_set rfd;	369	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	371	}
		372
		373	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		374	}
		375
		376	static SV *
		377	newSVaio_wd (aio_wd wd)
		378	{
		379	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		380	}
		381
		382	static aio_req
		383	SvAIO_REQ (SV *sv)
		384	{
		385	MAGIC *mg;
		386
		387	if (!SvROK (sv)
		388	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		389	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		390	&& SvSTASH (SvRV (sv)) != aio_req_stash
		391	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		392	croak ("object of class IO::AIO::REQ expected");
		393
		394	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		395
		396	return mg ? (aio_req)mg->mg_ptr : 0;
		397	}
		398
		399	static aio_wd
		400	SvAIO_WD (SV *sv)
		401	{
		402	if (!SvROK (sv)
		403	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		404	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		405	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		406
		407	return (aio_wd)(long)SvIVX (SvRV (sv));
		408	}
		409
		410	static void
		411	aio_grp_feed (aio_req grp)
		412	{
		413	if (grp->sv2 && SvOK (grp->sv2))
		414	{
		415	dSP;
		416
		417	ENTER;
		418	SAVETMPS;
		419	PUSHMARK (SP);
		420	XPUSHs (req_sv (grp, aio_grp_stash));
		421	PUTBACK;
		422	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		423	SPAGAIN;
		424	FREETMPS;
		425	LEAVE;
		426	}
		427	}
		428
		429	static void
		430	req_submit (eio_req *req)
		431	{
		432	eio_submit (req);
		433
		434	if (expect_false (on_next_submit))
		435	{
		436	dSP;
		437	SV *cb = sv_2mortal (on_next_submit);
		438
		439	on_next_submit = 0;
		440
		441	PUSHMARK (SP);
		442	PUTBACK;
		443	call_sv (cb, G_DISCARD | G_EVAL);
		444	}
84	}	445	}
85		446
86	static int	447	static int
87	poll_cb ()	448	req_invoke (eio_req *req)
88	{	449	{
89	dSP;	450	if (req->flags & FLAG_SV2_RO_OFF)
90	int count = 0;	451	SvREADONLY_off (req->sv2);
91	aio_req req, prv;
92		452
93	pthread_mutex_lock (&reslock);	453	if (!EIO_CANCELLED (req) && req->callback)
94
95	{
96	/* read any signals sent by the worker threads */
97	char buf [32];
98	while (read (respipe [0], buf, 32) == 32)
99	;
100	}
101
102	req = ress;
103	ress = rese = 0;
104
105	pthread_mutex_unlock (&reslock);
106
107	while (req)
108	{	454	{
109	nreqs--;	455	dSP;
		456	static SV *sv_result_cache; /* caches the result integer SV */
		457	SV *sv_result;
110		458
111	if (req->type == REQ_QUIT)	459	ENTER;
112	started--;	460	SAVETMPS;
113	else	461	PUSHMARK (SP);
		462	EXTEND (SP, 1);
		463
		464	/* do not recreate the result IV from scratch each time */
		465	if (expect_true (sv_result_cache))
114	{	466	{
115	int errorno = errno;	467	sv_result = sv_result_cache; sv_result_cache = 0;
116	errno = req->errorno;	468	SvIV_set (sv_result, req->result);
117		469	SvIOK_only (sv_result);
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}
136
137	ENTER;
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140
141	if (req->type == REQ_OPEN)
142	{
143	/* convert fd to fh */
144	SV *fh;
145
146	PUTBACK;
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148	SPAGAIN;
149
150	fh = SvREFCNT_inc (POPs);
151
152	PUSHMARK (SP);
153	XPUSHs (sv_2mortal (fh));
154	}
155
156	if (SvOK (req->callback))
157	{
158	PUTBACK;
159	call_sv (req->callback, G_VOID | G_EVAL);
160	SPAGAIN;
161	}
162
163	LEAVE;
164
165	if (req->callback)
166	SvREFCNT_dec (req->callback);
167
168	errno = errorno;
169	count++;
170	}
171
172	prv = req;
173	req = req->next;
174	Safefree (prv);
175
176	/* TODO: croak on errors? */
177	}
178
179	return count;
180	}
181
182	static void *aio_proc(void *arg);
183
184	static void
185	start_thread (void)
186	{
187	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	pthread_attr_t attr;
190
191	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
194
195	sigfillset (&fullsigset);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197
198	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
199	started++;
200
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);
202	}
203
204	static void
205	send_req (aio_req req)
206	{
207	nreqs++;
208
209	pthread_mutex_lock (&reqlock);
210
211	req->next = 0;
212
213	if (reqe)
214	{
215	reqe->next = req;
216	reqe = req;
217	}
218	else
219	reqe = reqs = req;
220
221	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);
223
224	while (nreqs > max_outstanding)
225	{
226	poll_wait ();
227	poll_cb ();
228	}
229	}
230
231	static void
232	end_thread (void)
233	{
234	aio_req req;
235	New (0, req, 1, aio_cb);
236	req->type = REQ_QUIT;
237
238	send_req (req);
239	}
240
241
242	static void min_parallel (int nthreads)
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}
278
279	max_parallel (0);
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}
298
299	static void atfork_parent (void)
300	{
301	pthread_mutex_unlock (&reslock);
302	min_parallel (fork_started);
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306
307	static void atfork_child (void)
308	{
309	reqs = reqe = 0;
310
311	atfork_parent ();
312	}
313
314	/*****************************************************************************/
315	/* work around various missing functions */
316
317	#if !HAVE_PREADWRITE
318	# define pread aio_pread
319	# define pwrite aio_pwrite
320
321	/*
322	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.
325	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
327
328	static ssize_t
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{
331	ssize_t res;
332	off_t ooffset;
333
334	pthread_mutex_lock (&iolock);
335	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);
340
341	return res;
342	}
343
344	static ssize_t
345	pwrite (int fd, void *buf, size_t count, off_t offset)
346	{
347	ssize_t res;
348	off_t ooffset;
349
350	pthread_mutex_lock (&iolock);
351	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);
356
357	return res;
358	}
359	#endif
360
361	#if !HAVE_FDATASYNC
362	# define fdatasync fsync
363	#endif
364
365	#if !HAVE_READAHEAD
366	# define readahead aio_readahead
367
368	static char readahead_buf[4096];
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)
372	{
373	while (count > 0)
374	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376
377	pread (fd, readahead_buf, len, offset);
378	offset += len;
379	count -= len;
380	}
381
382	errno = 0;
383	}
384	#endif
385
386	/*****************************************************************************/
387
388	static void *
389	aio_proc (void *thr_arg)
390	{
391	aio_req req;
392	int type;
393
394	do
395	{
396	pthread_mutex_lock (&reqlock);
397
398	for (;;)
399	{
400	req = reqs;
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407
408	if (req)
409	break;
410
411	pthread_cond_wait (&reqwait, &reqlock);
412	}
413
414	pthread_mutex_unlock (&reqlock);
415
416	errno = 0; /* strictly unnecessary */
417
418	type = req->type;
419
420	switch (type)
421	{
422	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
423	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424
425	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
426
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430
431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	case REQ_FSYNC: req->result = fsync (req->fd); break;
439
440	case REQ_QUIT:
441	break;
442
443	default:
444	req->result = ENOSYS;
445	break;
446	}
447
448	req->errorno = errno;
449
450	pthread_mutex_lock (&reslock);
451
452	req->next = 0;
453
454	if (rese)
455	{
456	rese->next = req;
457	rese = req;
458	}	470	}
459	else	471	else
460	{	472	{
461	rese = ress = req;	473	sv_result = newSViv (req->result);
462		474	SvREADONLY_on (sv_result);
463	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);
465	}	475	}
466		476
467	pthread_mutex_unlock (&reslock);	477	switch (req->type)
		478	{
		479	case EIO_WD_OPEN:
		480	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		481	break;
		482
		483	case EIO_READDIR:
		484	{
		485	SV *rv = &PL_sv_undef;
		486
		487	if (req->result >= 0)
		488	{
		489	int i;
		490	char *names = (char *)req->ptr2;
		491	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		492	AV *av = newAV ();
		493
		494	av_extend (av, req->result - 1);
		495
		496	for (i = 0; i < req->result; ++i)
		497	{
		498	if (req->int1 & EIO_READDIR_DENTS)
		499	{
		500	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		501
		502	if (req->int1 & EIO_READDIR_CUSTOM2)
		503	{
		504	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		505	AV *avent = newAV ();
		506
		507	av_extend (avent, 2);
		508
		509	if (!sv_type [ent->type])
		510	{
		511	sv_type [ent->type] = newSViv (ent->type);
		512	SvREADONLY_on (sv_type [ent->type]);
		513	}
		514
		515	av_store (avent, 0, namesv);
		516	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		517	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		518
		519	av_store (av, i, newRV_noinc ((SV *)avent));
		520	}
		521	else
		522	av_store (av, i, namesv);
		523
		524	++ent;
		525	}
		526	else
		527	{
		528	SV *name = newSVpv (names, 0);
		529	av_store (av, i, name);
		530	names += SvCUR (name) + 1;
		531	}
		532	}
		533
		534	rv = sv_2mortal (newRV_noinc ((SV *)av));
		535	}
		536
		537	PUSHs (rv);
		538
		539	if (req->int1 & EIO_READDIR_CUSTOM1)
		540	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		541	}
		542	break;
		543
		544	case EIO_OPEN:
		545	{
		546	/* convert fd to fh */
		547	SV *fh = &PL_sv_undef;
		548
		549	if (req->result >= 0)
		550	{
		551	GV *gv = (GV *)sv_newmortal ();
		552	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		553	char sym [64];
		554	int symlen;
		555
		556	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		557	gv_init (gv, aio_stash, sym, symlen, 0);
		558
		559	symlen = snprintf (
		560	sym,
		561	sizeof (sym),
		562	"%s&=%d",
		563	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		564	(int)req->result
		565	);
		566
		567	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		568	fh = (SV *)gv;
		569	}
		570
		571	PUSHs (fh);
		572	}
		573	break;
		574
		575	case EIO_STATVFS:
		576	case EIO_FSTATVFS:
		577	{
		578	SV *rv = &PL_sv_undef;
		579
		580	#ifndef _WIN32
		581	if (req->result >= 0)
		582	{
		583	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		584	HV *hv = newHV ();
		585
		586	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		587
		588	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		589	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		590	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		591	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		592	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		593	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		594	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		595	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		596	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		597	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		598	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		599	}
		600	#endif
		601
		602	PUSHs (rv);
		603	}
		604
		605	break;
		606
		607	case EIO_GROUP:
		608	req->int1 = 2; /* mark group as finished */
		609
		610	if (req->sv1)
		611	{
		612	int i;
		613	AV *av = (AV *)req->sv1;
		614
		615	EXTEND (SP, AvFILL (av) + 1);
		616	for (i = 0; i <= AvFILL (av); ++i)
		617	PUSHs (*av_fetch (av, i, 0));
		618	}
		619	break;
		620
		621	case EIO_NOP:
		622	case EIO_BUSY:
		623	break;
		624
		625	case EIO_READLINK:
		626	case EIO_REALPATH:
		627	if (req->result > 0)
		628	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		629	break;
		630
		631	case EIO_STAT:
		632	case EIO_LSTAT:
		633	case EIO_FSTAT:
		634	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		635
		636	if (!(PL_laststatval = req->result))
		637	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		638	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		639
		640	PUSHs (sv_result);
		641	break;
		642
		643	case EIO_READ:
		644	{
		645	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		646	*SvEND (req->sv2) = 0;
		647	SvPOK_only (req->sv2);
		648	SvSETMAGIC (req->sv2);
		649	PUSHs (sv_result);
		650	}
		651	break;
		652
		653	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		654	if (req->result > 0)
		655	SvIV_set (sv_result, 0);
		656	/* FALLTHROUGH */
		657
		658	default:
		659	PUSHs (sv_result);
		660	break;
		661	}
		662
		663	errno = req->errorno;
		664
		665	PUTBACK;
		666	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		667	SPAGAIN;
		668
		669	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		670	SvREFCNT_dec (sv_result);
		671	else
		672	sv_result_cache = sv_result;
		673
		674	FREETMPS;
		675	LEAVE;
		676
		677	PUTBACK;
468	}	678	}
469	while (type != REQ_QUIT);	679
		680	return !!SvTRUE (ERRSV);
		681	}
		682
		683	static void
		684	req_destroy (aio_req req)
		685	{
		686	if (req->self)
		687	{
		688	sv_unmagic (req->self, PERL_MAGIC_ext);
		689	SvREFCNT_dec (req->self);
		690	}
		691
		692	SvREFCNT_dec (req->sv1);
		693	SvREFCNT_dec (req->sv2);
		694	SvREFCNT_dec (req->sv3);
		695	SvREFCNT_dec (req->sv4);
		696	SvREFCNT_dec (req->callback);
		697
		698	free (req);
		699	}
		700
		701	static void
		702	req_cancel_subs (aio_req grp)
		703	{
		704	if (grp->type != EIO_GROUP)
		705	return;
		706
		707	SvREFCNT_dec (grp->sv2);
		708	grp->sv2 = 0;
		709
		710	eio_grp_cancel (grp);
		711	}
		712
		713	static void ecb_cold
		714	create_respipe (void)
		715	{
		716	if (s_epipe_renew (&respipe))
		717	croak ("IO::AIO: unable to initialize result pipe");
		718	}
		719
		720	static void
		721	poll_wait (void)
		722	{
		723	while (eio_nreqs ())
		724	{
		725	int size;
		726
		727	X_LOCK (reslock);
		728	size = res_queue.size;
		729	X_UNLOCK (reslock);
		730
		731	if (size)
		732	return;
		733
		734	etp_maybe_start_thread ();
		735
		736	s_epipe_wait (&respipe);
		737	}
		738	}
		739
		740	static int
		741	poll_cb (void)
		742	{
		743	for (;;)
		744	{
		745	int res = eio_poll ();
		746
		747	if (res > 0)
		748	croak (0);
		749
		750	if (!max_outstanding || max_outstanding > eio_nreqs ())
		751	return res;
		752
		753	poll_wait ();
		754	}
		755	}
		756
		757	static void ecb_cold
		758	reinit (void)
		759	{
		760	create_respipe ();
		761
		762	if (eio_init (want_poll, done_poll) < 0)
		763	croak ("IO::AIO: unable to initialise eio library");
		764	}
		765
		766	/*****************************************************************************/
		767
		768	#if !_POSIX_MAPPED_FILES
		769	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		770	# define munmap(addr,length) (errno = ENOSYS, -1)
		771	#endif
		772
		773	#if !_POSIX_MEMORY_PROTECTION
		774	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		775	# define PROT_NONE 0
		776	# define PROT_WRITE 0
		777	# define MAP_PRIVATE 0
		778	# define MAP_SHARED 0
		779	# define MAP_FIXED 0
		780	#endif
		781
		782	#define MMAP_MAGIC PERL_MAGIC_ext
		783
		784	static int ecb_cold
		785	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		786	{
		787	int old_errno = errno;
		788	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		789	errno = old_errno;
		790
		791	mg->mg_obj = 0; /* just in case */
		792
		793	SvREADONLY_off (sv);
		794
		795	if (SvPVX (sv) != mg->mg_ptr)
		796	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		797
		798	SvCUR_set (sv, 0);
		799	SvPVX (sv) = 0;
		800	SvOK_off (sv);
470		801
471	return 0;	802	return 0;
472	}	803	}
473		804
		805	static MGVTBL mmap_vtbl = {
		806	0, 0, 0, 0, mmap_free
		807	};
		808
		809	/*****************************************************************************/
		810
		811	static SV *
		812	get_cb (SV *cb_sv)
		813	{
		814	SvGETMAGIC (cb_sv);
		815	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		816	}
		817
		818	static aio_req ecb_noinline
		819	dreq (SV *callback)
		820	{
		821	SV *cb_cv;
		822	aio_req req;
		823	int req_pri = next_pri;
		824	next_pri = EIO_PRI_DEFAULT;
		825
		826	cb_cv = get_cb (callback);
		827
		828	req = calloc (sizeof (*req), 1);
		829	if (!req)
		830	croak ("out of memory during eio_req allocation");
		831
		832	req->callback = SvREFCNT_inc (cb_cv);
		833	req->pri = req_pri;
		834
		835	return req;
		836	}
		837
474	#define dREQ \	838	#define dREQ \
475	aio_req req; \	839	aio_req req = dreq (callback); \
		840
		841	#define REQ_SEND \
		842	PUTBACK; \
		843	req_submit (req); \
		844	SPAGAIN; \
476	\	845	\
477	if (SvOK (callback) && !SvROK (callback)) \	846	if (GIMME_V != G_VOID) \
478	croak ("clalback must be undef or of reference type"); \	847	XPUSHs (req_sv (req, aio_req_stash));
479	\	848
480	Newz (0, req, 1, aio_cb); \	849	ecb_inline void
481	if (!req) \	850	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
482	croak ("out of memory during aio_req allocation"); \	851	{
483	\	852	if (expect_false (SvROK (path)))
484	req->callback = SvREFCNT_inc (callback);	853	{
485		854	SV *rv = SvRV (path);
		855	SV *wdob;
		856
		857	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		858	{
		859	path = AvARRAY (rv)[1];
		860	wdob = AvARRAY (rv)[0];
		861
		862	if (SvOK (wdob))
		863	{
		864	*wd = SvAIO_WD (wdob);
		865	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		866	}
		867	else
		868	*wd = EIO_INVALID_WD;
		869	}
		870	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		871	{
		872	*wd = (aio_wd)(long)SvIVX (rv);
		873	*wdsv = SvREFCNT_inc_NN (rv);
		874	*ptr = ".";
		875	return; /* path set to "." */
		876	}
		877	else
		878	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		879	}
		880
		881	*pathsv = newSVsv (path);
		882	*ptr = SvPVbyte_nolen (*pathsv);
		883	}
		884
		885	static void ecb_noinline
		886	req_set_path1 (aio_req req, SV *path)
		887	{
		888	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		889	}
		890
		891	static void ecb_noinline
		892	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		893	{
		894	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		895
		896	switch (SvTYPE (rv))
		897	{
		898	case SVt_PVIO:
		899	case SVt_PVLV:
		900	case SVt_PVGV:
		901	req->type = type_fh;
		902	req->sv1 = newSVsv (fh_or_path);
		903	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		904	break;
		905
		906	default:
		907	req->type = type_path;
		908	req_set_path1 (req, fh_or_path);
		909	break;
		910	}
		911	}
		912
		913	XS(boot_IO__AIO) ecb_cold;
		914
486	MODULE = IO::AIO PACKAGE = IO::AIO	915	MODULE = IO::AIO PACKAGE = IO::AIO
487		916
488	PROTOTYPES: ENABLE	917	PROTOTYPES: ENABLE
489		918
490	BOOT:	919	BOOT:
491	{	920	{
492	if (pipe (respipe))	921	static const struct {
493	croak ("unable to initialize result pipe");	922	const char *name;
		923	IV iv;
		924	} *civ, const_iv[] = {
		925	# define const_niv(name, value) { # name, (IV) value },
		926	# define const_iv(name) { # name, (IV) name },
		927	# define const_eio(name) { # name, (IV) EIO_ ## name },
		928	const_iv (EXDEV)
		929	const_iv (ENOSYS)
		930	const_iv (O_RDONLY)
		931	const_iv (O_WRONLY)
		932	const_iv (O_RDWR)
		933	const_iv (O_CREAT)
		934	const_iv (O_TRUNC)
		935	const_iv (O_EXCL)
		936	const_iv (O_APPEND)
494		937
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	938	const_iv (O_ASYNC)
496	croak ("cannot set result pipe to nonblocking mode");	939	const_iv (O_DIRECT)
		940	const_iv (O_NOATIME)
497		941
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	942	const_iv (O_CLOEXEC)
499	croak ("cannot set result pipe to nonblocking mode");	943	const_iv (O_NOCTTY)
		944	const_iv (O_NOFOLLOW)
		945	const_iv (O_NONBLOCK)
		946	const_iv (O_EXEC)
		947	const_iv (O_SEARCH)
		948	const_iv (O_DIRECTORY)
		949	const_iv (O_DSYNC)
		950	const_iv (O_RSYNC)
		951	const_iv (O_SYNC)
		952	const_iv (O_TTY_INIT)
500		953
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	954	const_iv (S_IFIFO)
502	}	955	const_iv (S_IFCHR)
		956	const_iv (S_IFBLK)
		957	const_iv (S_IFLNK)
		958	const_iv (S_IFREG)
		959	const_iv (S_IFDIR)
		960	const_iv (S_IFWHT)
		961	const_iv (S_IFSOCK)
		962	const_iv (S_IFMT)
503		963
		964	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		965	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		966	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		967	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		968	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		969	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		970
		971	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		972	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		973	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		974	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		975	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		976
		977	const_iv (ST_RDONLY)
		978	const_iv (ST_NOSUID)
		979	const_iv (ST_NODEV)
		980	const_iv (ST_NOEXEC)
		981	const_iv (ST_SYNCHRONOUS)
		982	const_iv (ST_MANDLOCK)
		983	const_iv (ST_WRITE)
		984	const_iv (ST_APPEND)
		985	const_iv (ST_IMMUTABLE)
		986	const_iv (ST_NOATIME)
		987	const_iv (ST_NODIRATIME)
		988	const_iv (ST_RELATIME)
		989
		990	const_iv (PROT_NONE)
		991	const_iv (PROT_EXEC)
		992	const_iv (PROT_READ)
		993	const_iv (PROT_WRITE)
		994
		995	/*const_iv (MAP_FIXED)*/
		996	const_iv (MAP_PRIVATE)
		997	const_iv (MAP_SHARED)
		998	const_iv (MAP_ANONYMOUS)
		999
		1000	/* linuxish */
		1001	const_iv (MAP_HUGETLB)
		1002	const_iv (MAP_LOCKED)
		1003	const_iv (MAP_NORESERVE)
		1004	const_iv (MAP_POPULATE)
		1005	const_iv (MAP_NONBLOCK)
		1006
		1007	const_eio (MCL_FUTURE)
		1008	const_eio (MCL_CURRENT)
		1009
		1010	const_eio (MS_ASYNC)
		1011	const_eio (MS_INVALIDATE)
		1012	const_eio (MS_SYNC)
		1013
		1014	const_eio (MT_MODIFY)
		1015
		1016	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1017	const_eio (SYNC_FILE_RANGE_WRITE)
		1018	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1019
		1020	const_eio (FALLOC_FL_KEEP_SIZE)
		1021
		1022	const_eio (READDIR_DENTS)
		1023	const_eio (READDIR_DIRS_FIRST)
		1024	const_eio (READDIR_STAT_ORDER)
		1025	const_eio (READDIR_FOUND_UNKNOWN)
		1026
		1027	const_eio (DT_UNKNOWN)
		1028	const_eio (DT_FIFO)
		1029	const_eio (DT_CHR)
		1030	const_eio (DT_DIR)
		1031	const_eio (DT_BLK)
		1032	const_eio (DT_REG)
		1033	const_eio (DT_LNK)
		1034	const_eio (DT_SOCK)
		1035	const_eio (DT_WHT)
		1036	};
		1037
		1038	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1039	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1040	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1041	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1042
		1043	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1044	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1045
		1046	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1047
		1048	reinit ();
		1049	}
		1050
504	void	1051	void
505	min_parallel(nthreads)	1052	reinit ()
506	int nthreads	1053	PROTOTYPE:
		1054
		1055	void
		1056	max_poll_reqs (unsigned int nreqs)
507	PROTOTYPE: $	1057	PROTOTYPE: $
		1058	CODE:
		1059	eio_set_max_poll_reqs (nreqs);
508		1060
509	void	1061	void
510	max_parallel(nthreads)	1062	max_poll_time (double nseconds)
511	int nthreads
512	PROTOTYPE: $	1063	PROTOTYPE: $
513
514	int
515	max_outstanding(nreqs)
516	int nreqs
517	PROTOTYPE: $
518	CODE:	1064	CODE:
519	RETVAL = max_outstanding;	1065	eio_set_max_poll_time (nseconds);
		1066
		1067	void
		1068	min_parallel (unsigned int nthreads)
		1069	PROTOTYPE: $
		1070	CODE:
		1071	eio_set_min_parallel (nthreads);
		1072
		1073	void
		1074	max_parallel (unsigned int nthreads)
		1075	PROTOTYPE: $
		1076	CODE:
		1077	eio_set_max_parallel (nthreads);
		1078
		1079	void
		1080	max_idle (unsigned int nthreads)
		1081	PROTOTYPE: $
		1082	CODE:
		1083	eio_set_max_idle (nthreads);
		1084
		1085	void
		1086	idle_timeout (unsigned int seconds)
		1087	PROTOTYPE: $
		1088	CODE:
		1089	eio_set_idle_timeout (seconds);
		1090
		1091	void
		1092	max_outstanding (unsigned int maxreqs)
		1093	PROTOTYPE: $
		1094	CODE:
520	max_outstanding = nreqs;	1095	max_outstanding = maxreqs;
521		1096
522	void	1097	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1098	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
524	SV * pathname
525	int flags
526	int mode
527	SV * callback
528	PROTOTYPE: $$$;$
529	CODE:	1099	PPCODE:
530	{	1100	{
531	dREQ;	1101	dREQ;
532		1102
		1103	req->type = EIO_WD_OPEN;
		1104	req_set_path1 (req, pathname);
		1105
		1106	REQ_SEND;
		1107	}
		1108
		1109	void
		1110	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1111	PPCODE:
		1112	{
		1113	dREQ;
		1114
533	req->type = REQ_OPEN;	1115	req->type = EIO_OPEN;
534	req->data = newSVsv (pathname);	1116	req_set_path1 (req, pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);
536	req->fd = flags;	1117	req->int1 = flags;
537	req->mode = mode;	1118	req->int2 = mode;
538		1119
539	send_req (req);	1120	REQ_SEND;
540	}	1121	}
541		1122
542	void	1123	void
543	aio_close(fh,callback=&PL_sv_undef)	1124	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
544	SV * fh
545	SV * callback
546	PROTOTYPE: $;$
547	ALIAS:	1125	ALIAS:
548	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	1126	aio_fsync = EIO_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	1127	aio_fdatasync = EIO_FDATASYNC
		1128	aio_syncfs = EIO_SYNCFS
551	CODE:	1129	PPCODE:
552	{	1130	{
		1131	int fd = s_fileno_croak (fh, 0);
553	dREQ;	1132	dREQ;
554		1133
555	req->type = ix;	1134	req->type = ix;
556	req->fh = newSVsv (fh);	1135	req->sv1 = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1136	req->int1 = fd;
558		1137
559	send_req (req);	1138	REQ_SEND (req);
560	}	1139	}
561		1140
562	void	1141	void
		1142	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1143	PPCODE:
		1144	{
		1145	int fd = s_fileno_croak (fh, 0);
		1146	dREQ;
		1147
		1148	req->type = EIO_SYNC_FILE_RANGE;
		1149	req->sv1 = newSVsv (fh);
		1150	req->int1 = fd;
		1151	req->offs = offset;
		1152	req->size = nbytes;
		1153	req->int2 = flags;
		1154
		1155	REQ_SEND (req);
		1156	}
		1157
		1158	void
		1159	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	int fd = s_fileno_croak (fh, 0);
		1163	dREQ;
		1164
		1165	req->type = EIO_FALLOCATE;
		1166	req->sv1 = newSVsv (fh);
		1167	req->int1 = fd;
		1168	req->int2 = mode;
		1169	req->offs = offset;
		1170	req->size = len;
		1171
		1172	REQ_SEND (req);
		1173	}
		1174
		1175	void
		1176	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1177	PPCODE:
		1178	{
		1179	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1180	int fd = s_fileno_croak (fh, 0);
		1181	dREQ;
		1182
		1183	if (expect_false (close_fd < 0))
		1184	{
		1185	int pipefd [2];
		1186
		1187	if (
		1188	#ifdef _WIN32
		1189	_pipe (pipefd, 1, _O_BINARY) < 0
		1190	#else
		1191	pipe (pipefd) < 0
		1192	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1193	#endif
		1194	|| close (pipefd [1]) < 0
		1195	)
		1196	abort (); /*D*/
		1197
		1198	close_fd = pipefd [0];
		1199	}
		1200
		1201	req->type = EIO_DUP2;
		1202	req->int1 = close_fd;
		1203	req->sv2 = newSVsv (fh);
		1204	req->int2 = fd;
		1205
		1206	REQ_SEND (req);
		1207	}
		1208
		1209	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1210	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
564	SV * fh
565	UV offset
566	IV length
567	SV * data
568	IV dataoffset
569	SV * callback
570	ALIAS:	1211	ALIAS:
571	aio_read = REQ_READ	1212	aio_read = EIO_READ
572	aio_write = REQ_WRITE	1213	aio_write = EIO_WRITE
573	PROTOTYPE: $$$$$;$
574	CODE:	1214	PPCODE:
575	{	1215	{
576	aio_req req;
577	STRLEN svlen;	1216	STRLEN svlen;
		1217	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
578	char *svptr = SvPVbyte (data, svlen);	1218	char *svptr = SvPVbyte (data, svlen);
579		1219	UV len = SvUV (length);
580	SvUPGRADE (data, SVt_PV);
581	SvPOK_on (data);
582		1220
583	if (dataoffset < 0)	1221	if (dataoffset < 0)
584	dataoffset += svlen;	1222	dataoffset += svlen;
585		1223
586	if (dataoffset < 0 || dataoffset > svlen)	1224	if (dataoffset < 0 || dataoffset > svlen)
587	croak ("data offset outside of string");	1225	croak ("dataoffset outside of data scalar");
588		1226
589	if (ix == REQ_WRITE)	1227	if (ix == EIO_WRITE)
590	{	1228	{
591	/* write: check length and adjust. */	1229	/* write: check length and adjust. */
592	if (length < 0 || length + dataoffset > svlen)	1230	if (!SvOK (length) || len + dataoffset > svlen)
593	length = svlen - dataoffset;	1231	len = svlen - dataoffset;
594	}	1232	}
595	else	1233	else
596	{	1234	{
597	/* read: grow scalar as necessary */	1235	/* read: check type and grow scalar as necessary */
		1236	SvUPGRADE (data, SVt_PV);
598	svptr = SvGROW (data, length + dataoffset);	1237	svptr = SvGROW (data, len + dataoffset + 1);
599	}	1238	}
600
601	if (length < 0)
602	croak ("length must not be negative");
603		1239
604	{	1240	{
605	dREQ;	1241	dREQ;
606		1242
607	req->type = ix;	1243	req->type = ix;
608	req->fh = newSVsv (fh);	1244	req->sv1 = newSVsv (fh);
609	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1245	req->int1 = fd;
610	: IoOFP (sv_2io (fh)));	1246	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
611	req->offset = offset;	1247	req->size = len;
612	req->length = length;
613	req->data = SvREFCNT_inc (data);	1248	req->sv2 = SvREFCNT_inc (data);
614	req->dataptr = (char *)svptr + dataoffset;	1249	req->ptr2 = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);	1250	req->stroffset = dataoffset;
616		1251
617	send_req (req);	1252	if (!SvREADONLY (data))
		1253	{
		1254	SvREADONLY_on (data);
		1255	req->flags |= FLAG_SV2_RO_OFF;
		1256	}
		1257
		1258	REQ_SEND;
618	}	1259	}
619	}	1260	}
620		1261
621	void	1262	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1263	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
623	SV * fh	1264	ALIAS:
624	UV offset	1265	aio_readlink = EIO_READLINK
625	IV length	1266	aio_realpath = EIO_REALPATH
626	SV * callback
627	PROTOTYPE: $$$;$
628	CODE:	1267	PPCODE:
629	{	1268	{
		1269	dREQ;
		1270
		1271	req->type = ix;
		1272	req_set_path1 (req, pathname);
		1273
		1274	REQ_SEND;
		1275	}
		1276
		1277	void
		1278	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1279	PPCODE:
		1280	{
		1281	int ifd = s_fileno_croak (in_fh , 0);
		1282	int ofd = s_fileno_croak (out_fh, 1);
630	dREQ;	1283	dREQ;
631		1284
		1285	req->type = EIO_SENDFILE;
		1286	req->sv1 = newSVsv (out_fh);
		1287	req->int1 = ofd;
		1288	req->sv2 = newSVsv (in_fh);
		1289	req->int2 = ifd;
		1290	req->offs = in_offset;
		1291	req->size = length;
		1292
		1293	REQ_SEND;
		1294	}
		1295
		1296	void
		1297	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1298	PPCODE:
		1299	{
		1300	int fd = s_fileno_croak (fh, 0);
		1301	dREQ;
		1302
632	req->type = REQ_READAHEAD;	1303	req->type = EIO_READAHEAD;
633	req->fh = newSVsv (fh);	1304	req->sv1 = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1305	req->int1 = fd;
635	req->offset = offset;	1306	req->offs = offset;
636	req->length = length;	1307	req->size = length;
637		1308
638	send_req (req);	1309	REQ_SEND;
639	}	1310	}
640		1311
641	void	1312	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)	1313	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
643	SV * fh_or_path
644	SV * callback
645	ALIAS:	1314	ALIAS:
646	aio_stat = REQ_STAT	1315	aio_stat = EIO_STAT
647	aio_lstat = REQ_LSTAT	1316	aio_lstat = EIO_LSTAT
		1317	aio_statvfs = EIO_STATVFS
		1318	PPCODE:
		1319	{
		1320	dREQ;
		1321
		1322	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1323
		1324	REQ_SEND;
		1325	}
		1326
		1327	UV
		1328	major (UV dev)
		1329	ALIAS:
		1330	minor = 1
648	CODE:	1331	CODE:
		1332	RETVAL = ix ? major (dev) : minor (dev);
		1333	OUTPUT:
		1334	RETVAL
		1335
		1336	UV
		1337	makedev (UV maj, UV min)
		1338	CODE:
		1339	RETVAL = makedev (maj, min);
		1340	OUTPUT:
		1341	RETVAL
		1342
		1343	void
		1344	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1345	PPCODE:
649	{	1346	{
650	dREQ;	1347	dREQ;
651		1348
652	New (0, req->statdata, 1, Stat_t);	1349	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
653	if (!req->statdata)	1350	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1351	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
655		1352
656	if (SvPOK (fh_or_path))	1353	REQ_SEND;
657	{
658	req->type = ix;
659	req->data = newSVsv (fh_or_path);
660	req->dataptr = SvPVbyte_nolen (req->data);
661	}
662	else
663	{
664	req->type = REQ_FSTAT;
665	req->fh = newSVsv (fh_or_path);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667	}
668
669	send_req (req);
670	}	1354	}
671		1355
672	void	1356	void
		1357	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1358	PPCODE:
		1359	{
		1360	dREQ;
		1361
		1362	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1363	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1364
		1365	REQ_SEND;
		1366	}
		1367
		1368	void
		1369	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->int2 = mode;
		1375	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1387	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1388	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->type = EIO_READDIR;
		1400	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1401
		1402	if (flags & EIO_READDIR_DENTS)
		1403	req->int1 |= EIO_READDIR_CUSTOM2;
		1404
		1405	req_set_path1 (req, pathname);
		1406
		1407	REQ_SEND;
		1408	}
		1409
		1410	void
		1411	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1412	PPCODE:
		1413	{
		1414	dREQ;
		1415
		1416	req->type = EIO_MKDIR;
		1417	req->int2 = mode;
		1418	req_set_path1 (req, pathname);
		1419
		1420	REQ_SEND;
		1421	}
		1422
		1423	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	1424	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
674	SV * pathname
675	SV * callback
676	ALIAS:	1425	ALIAS:
677	aio_unlink = REQ_UNLINK	1426	aio_unlink = EIO_UNLINK
678	aio_rmdir = REQ_RMDIR	1427	aio_rmdir = EIO_RMDIR
		1428	aio_readdir = EIO_READDIR
679	CODE:	1429	PPCODE:
680	{	1430	{
681	dREQ;	1431	dREQ;
682		1432
683	req->type = ix;	1433	req->type = ix;
684	req->data = newSVsv (pathname);	1434	req_set_path1 (req, pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);
686
687	send_req (req);
688	}
689		1435
		1436	REQ_SEND;
		1437	}
		1438
690	void	1439	void
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1440	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
692	SV * oldpath	1441	ALIAS:
693	SV * newpath	1442	aio_link = EIO_LINK
694	SV * callback	1443	aio_symlink = EIO_SYMLINK
		1444	aio_rename = EIO_RENAME
695	CODE:	1445	PPCODE:
696	{	1446	{
		1447	eio_wd wd2 = 0;
697	dREQ;	1448	dREQ;
698		1449
699	req->type = REQ_SYMLINK;	1450	req->type = ix;
700	req->fh = newSVsv (oldpath);	1451	req_set_path1 (req, oldpath);
701	req->data2ptr = SvPVbyte_nolen (req->fh);	1452	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
702	req->data = newSVsv (newpath);	1453	req->int3 = (long)wd2;
703	req->dataptr = SvPVbyte_nolen (req->data);
704		1454
705	send_req (req);	1455	REQ_SEND;
706	}	1456	}
707		1457
708	void	1458	void
709	flush()	1459	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
710	PROTOTYPE:	1460	PPCODE:
		1461	{
		1462	dREQ;
		1463
		1464	req->type = EIO_MKNOD;
		1465	req->int2 = (mode_t)mode;
		1466	req->offs = dev;
		1467	req_set_path1 (req, pathname);
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	void
		1473	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1474	ALIAS:
		1475	aio_mtouch = EIO_MTOUCH
		1476	aio_msync = EIO_MSYNC
		1477	PPCODE:
		1478	{
		1479	STRLEN svlen;
		1480	char *svptr = SvPVbyte (data, svlen);
		1481	UV len = SvUV (length);
		1482
		1483	if (offset < 0)
		1484	offset += svlen;
		1485
		1486	if (offset < 0 || offset > svlen)
		1487	croak ("offset outside of scalar");
		1488
		1489	if (!SvOK (length) || len + offset > svlen)
		1490	len = svlen - offset;
		1491
		1492	{
		1493	dREQ;
		1494
		1495	req->type = ix;
		1496	req->sv2 = SvREFCNT_inc (data);
		1497	req->ptr2 = (char *)svptr + offset;
		1498	req->size = len;
		1499	req->int1 = flags;
		1500
		1501	REQ_SEND;
		1502	}
		1503	}
		1504
		1505	void
		1506	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1507	PPCODE:
		1508	{
		1509	STRLEN svlen;
		1510	char *svptr = SvPVbyte (data, svlen);
		1511	UV len = SvUV (length);
		1512
		1513	if (offset < 0)
		1514	offset += svlen;
		1515
		1516	if (offset < 0 || offset > svlen)
		1517	croak ("offset outside of scalar");
		1518
		1519	if (!SvOK (length) || len + offset > svlen)
		1520	len = svlen - offset;
		1521
		1522	{
		1523	dREQ;
		1524
		1525	req->type = EIO_MLOCK;
		1526	req->sv2 = SvREFCNT_inc (data);
		1527	req->ptr2 = (char *)svptr + offset;
		1528	req->size = len;
		1529
		1530	REQ_SEND;
		1531	}
		1532	}
		1533
		1534	void
		1535	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	dREQ;
		1539
		1540	req->type = EIO_MLOCKALL;
		1541	req->int1 = flags;
		1542
		1543	REQ_SEND;
		1544	}
		1545
		1546	void
		1547	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1548	PPCODE:
		1549	{
		1550	dREQ;
		1551
		1552	req->type = EIO_BUSY;
		1553	req->nv1 = delay < 0. ? 0. : delay;
		1554
		1555	REQ_SEND;
		1556	}
		1557
		1558	void
		1559	aio_group (SV *callback=&PL_sv_undef)
		1560	PPCODE:
		1561	{
		1562	dREQ;
		1563
		1564	req->type = EIO_GROUP;
		1565
		1566	req_submit (req);
		1567	XPUSHs (req_sv (req, aio_grp_stash));
		1568	}
		1569
		1570	void
		1571	aio_nop (SV *callback=&PL_sv_undef)
		1572	ALIAS:
		1573	aio_nop = EIO_NOP
		1574	aio_sync = EIO_SYNC
		1575	PPCODE:
		1576	{
		1577	dREQ;
		1578
		1579	req->type = ix;
		1580
		1581	REQ_SEND;
		1582	}
		1583
		1584	int
		1585	aioreq_pri (int pri = 0)
711	CODE:	1586	CODE:
		1587	RETVAL = next_pri;
		1588	if (items > 0)
		1589	{
		1590	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1591	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1592	next_pri = pri;
		1593	}
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	void
		1598	aioreq_nice (int nice = 0)
		1599	CODE:
		1600	nice = next_pri - nice;
		1601	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1602	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1603	next_pri = nice;
		1604
		1605	void
		1606	flush ()
		1607	CODE:
712	while (nreqs)	1608	while (eio_nreqs ())
713	{	1609	{
714	poll_wait ();	1610	poll_wait ();
715	poll_cb ();	1611	poll_cb ();
716	}	1612	}
717		1613
718	void	1614	int
719	poll()	1615	poll ()
720	PROTOTYPE:
721	CODE:	1616	CODE:
722	if (nreqs)
723	{
724	poll_wait ();	1617	poll_wait ();
725	poll_cb ();	1618	RETVAL = poll_cb ();
726	}
727
728	int
729	poll_fileno()
730	PROTOTYPE:
731	CODE:
732	RETVAL = respipe [0];
733	OUTPUT:	1619	OUTPUT:
734	RETVAL	1620	RETVAL
735		1621
736	int	1622	int
		1623	poll_fileno ()
		1624	CODE:
		1625	RETVAL = s_epipe_fd (&respipe);
		1626	OUTPUT:
		1627	RETVAL
		1628
		1629	int
737	poll_cb(...)	1630	poll_cb (...)
738	PROTOTYPE:	1631	PROTOTYPE:
739	CODE:	1632	CODE:
740	RETVAL = poll_cb ();	1633	RETVAL = poll_cb ();
741	OUTPUT:	1634	OUTPUT:
742	RETVAL	1635	RETVAL
743		1636
744	void	1637	void
745	poll_wait()	1638	poll_wait ()
746	PROTOTYPE:
747	CODE:	1639	CODE:
748	if (nreqs)
749	poll_wait ();	1640	poll_wait ();
750		1641
751	int	1642	int
752	nreqs()	1643	nreqs ()
753	PROTOTYPE:
754	CODE:	1644	CODE:
755	RETVAL = nreqs;	1645	RETVAL = eio_nreqs ();
756	OUTPUT:	1646	OUTPUT:
757	RETVAL	1647	RETVAL
758		1648
		1649	int
		1650	nready ()
		1651	CODE:
		1652	RETVAL = eio_nready ();
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	int
		1657	npending ()
		1658	CODE:
		1659	RETVAL = eio_npending ();
		1660	OUTPUT:
		1661	RETVAL
		1662
		1663	int
		1664	nthreads ()
		1665	CODE:
		1666	RETVAL = eio_nthreads ();
		1667	OUTPUT:
		1668	RETVAL
		1669
		1670	int
		1671	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1672	CODE:
		1673	RETVAL = posix_fadvise (fh, offset, length, advice);
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	IV
		1678	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1679	CODE:
		1680	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1681	OUTPUT:
		1682	RETVAL
		1683
		1684	void
		1685	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1686	PPCODE:
		1687	sv_unmagic (scalar, MMAP_MAGIC);
		1688	{
		1689	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1690	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1691	if (addr == (void *)-1)
		1692	XSRETURN_NO;
		1693
		1694	sv_force_normal (scalar);
		1695
		1696	/* we store the length in mg_obj, as namlen is I32 :/ */
		1697	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1698	->mg_obj = (SV *)length;
		1699
		1700	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1701
		1702	if (!(prot & PROT_WRITE))
		1703	SvREADONLY_on (scalar);
		1704
		1705	if (SvLEN (scalar))
		1706	Safefree (SvPVX (scalar));
		1707
		1708	SvPVX (scalar) = (char *)addr;
		1709	SvCUR_set (scalar, length);
		1710	SvLEN_set (scalar, 0);
		1711	SvPOK_only (scalar);
		1712
		1713	XSRETURN_YES;
		1714	}
		1715
		1716	void
		1717	munmap (SV *scalar)
		1718	CODE:
		1719	sv_unmagic (scalar, MMAP_MAGIC);
		1720
		1721	int
		1722	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1723	ALIAS:
		1724	mprotect = 1
		1725	CODE:
		1726	{
		1727	STRLEN svlen;
		1728	void *addr = SvPVbyte (scalar, svlen);
		1729	size_t len = SvUV (length);
		1730
		1731	if (offset < 0)
		1732	offset += svlen;
		1733
		1734	if (offset < 0 || offset > svlen)
		1735	croak ("offset outside of scalar");
		1736
		1737	if (!SvOK (length) || len + offset > svlen)
		1738	len = svlen - offset;
		1739
		1740	addr = (void *)(((intptr_t)addr) + offset);
		1741	eio_page_align (&addr, &len);
		1742
		1743	switch (ix)
		1744	{
		1745	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1746	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1747	}
		1748	}
		1749	OUTPUT:
		1750	RETVAL
		1751
		1752	int
		1753	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1754	CODE:
		1755	{
		1756	STRLEN svlen;
		1757	void *addr = SvPVbyte (scalar, svlen);
		1758	size_t len = SvUV (length);
		1759
		1760	if (offset < 0)
		1761	offset += svlen;
		1762
		1763	if (offset < 0 || offset > svlen)
		1764	croak ("offset outside of scalar");
		1765
		1766	if (!SvOK (length) || len + offset > svlen)
		1767	len = svlen - offset;
		1768
		1769	addr = (void *)(((intptr_t)addr) + offset);
		1770	eio_page_align (&addr, &len);
		1771	#if _POSIX_MEMLOCK_RANGE
		1772	RETVAL = munlock (addr, len);
		1773	#else
		1774	RETVAL = ((errno = ENOSYS), -1);
		1775	#endif
		1776	}
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	int
		1781	munlockall ()
		1782	CODE:
		1783	#if _POSIX_MEMLOCK
		1784	munlockall ();
		1785	#else
		1786	RETVAL = -1;
		1787	errno = ENOSYS;
		1788	#endif
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	void _on_next_submit (SV *cb)
		1793	CODE:
		1794	SvREFCNT_dec (on_next_submit);
		1795	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1796
		1797	PROTOTYPES: DISABLE
		1798
		1799	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1800
		1801	BOOT:
		1802	{
		1803	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1804	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1805	}
		1806
		1807	void
		1808	DESTROY (SV *self)
		1809	CODE:
		1810	{
		1811	aio_wd wd = SvAIO_WD (self);
		1812	#if HAVE_AT
		1813	{
		1814	SV *callback = &PL_sv_undef;
		1815	dREQ; /* clobbers next_pri :/ */
		1816	next_pri = req->pri; /* restore next_pri */
		1817	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1818	req->type = EIO_WD_CLOSE;
		1819	req->wd = wd;
		1820	REQ_SEND;
		1821	}
		1822	#else
		1823	eio_wd_close_sync (wd);
		1824	#endif
		1825	}
		1826
		1827	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1828
		1829	void
		1830	cancel (aio_req_ornot req)
		1831	CODE:
		1832	eio_cancel (req);
		1833
		1834	void
		1835	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1836	PPCODE:
		1837	{
		1838	if (GIMME_V != G_VOID)
		1839	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1840
		1841	if (items > 1)
		1842	{
		1843	SV *cb_cv =get_cb (callback);
		1844
		1845	SvREFCNT_dec (req->callback);
		1846	req->callback = SvREFCNT_inc (cb_cv);
		1847	}
		1848	}
		1849
		1850	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1851
		1852	void
		1853	add (aio_req grp, ...)
		1854	PPCODE:
		1855	{
		1856	int i;
		1857
		1858	if (grp->int1 == 2)
		1859	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1860
		1861	for (i = 1; i < items; ++i )
		1862	{
		1863	aio_req req;
		1864
		1865	if (GIMME_V != G_VOID)
		1866	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1867
		1868	req = SvAIO_REQ (ST (i));
		1869
		1870	if (req)
		1871	eio_grp_add (grp, req);
		1872	}
		1873	}
		1874
		1875	void
		1876	cancel_subs (aio_req_ornot req)
		1877	CODE:
		1878	req_cancel_subs (req);
		1879
		1880	void
		1881	result (aio_req grp, ...)
		1882	CODE:
		1883	{
		1884	int i;
		1885	AV *av;
		1886
		1887	grp->errorno = errno;
		1888
		1889	av = newAV ();
		1890	av_extend (av, items - 1);
		1891
		1892	for (i = 1; i < items; ++i )
		1893	av_push (av, newSVsv (ST (i)));
		1894
		1895	SvREFCNT_dec (grp->sv1);
		1896	grp->sv1 = (SV *)av;
		1897	}
		1898
		1899	void
		1900	errno (aio_req grp, int errorno = errno)
		1901	CODE:
		1902	grp->errorno = errorno;
		1903
		1904	void
		1905	limit (aio_req grp, int limit)
		1906	CODE:
		1907	eio_grp_limit (grp, limit);
		1908
		1909	void
		1910	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1911	CODE:
		1912	{
		1913	SvREFCNT_dec (grp->sv2);
		1914	grp->sv2 = newSVsv (callback);
		1915	grp->feed = aio_grp_feed;
		1916
		1917	if (grp->int2 <= 0)
		1918	grp->int2 = 2;
		1919
		1920	eio_grp_limit (grp, grp->int2);
		1921	}
		1922

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