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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 UTC vs.
Revision 1.182 by root, Thu May 19 22:57:04 2011 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
13	#include <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
15	#include <limits.h>	17	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	18	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	19	#include <sched.h>
20		20
21	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
22	# if __linux
23	# include <sys/sendfile.h>	22	# include <sys/mman.h>
24	# elif __freebsd	23	#endif
25	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
26	# include <sys/uio.h>	68	# include <sys/time.h>
27	# elif __hpux
28	# include <sys/socket.h>
29	# elif __solaris /* not yet */
30	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	/* Linux/others */
		127	#ifndef O_ASYNC
		128	# define O_ASYNC 0
		129	#endif
		130	#ifndef O_DIRECT
		131	# define O_DIRECT 0
		132	#endif
		133	#ifndef O_NOATIME
		134	# define O_NOATIME 0
		135	#endif
		136
		137	/* POSIX */
		138	#ifndef O_CLOEXEC
		139	# define O_CLOEXEC 0
		140	#endif
		141	#ifndef O_NOFOLLOW
		142	# define O_NOFOLLOW 0
		143	#endif
		144	#ifndef O_NOCTTY
		145	# define O_NOCTTY 0
		146	#endif
		147	#ifndef O_NONBLOCK
		148	# define O_NONBLOCK 0
		149	#endif
		150	#ifndef O_EXEC
		151	# define O_EXEC 0
		152	#endif
		153	#ifndef O_SEARCH
		154	# define O_SEARCH 0
		155	#endif
		156	#ifndef O_DIRECTORY
		157	# define O_DIRECTORY 0
		158	#endif
		159	#ifndef O_DSYNC
		160	# define O_DSYNC 0
		161	#endif
		162	#ifndef O_RSYNC
		163	# define O_RSYNC 0
		164	#endif
		165	#ifndef O_SYNC
		166	# define O_SYNC 0
		167	#endif
		168	#ifndef O_TTY_INIT
		169	# define O_TTY_INIT 0
		170	#endif
		171
		172	#ifndef POSIX_FADV_NORMAL
		173	# define POSIX_FADV_NORMAL 0
		174	#endif
		175	#ifndef POSIX_FADV_SEQUENTIAL
		176	# define POSIX_FADV_SEQUENTIAL 0
		177	#endif
		178	#ifndef POSIX_FADV_RANDOM
		179	# define POSIX_FADV_RANDOM 0
		180	#endif
		181	#ifndef POSIX_FADV_NOREUSE
		182	# define POSIX_FADV_NOREUSE 0
		183	#endif
		184	#ifndef POSIX_FADV_WILLNEED
		185	# define POSIX_FADV_WILLNEED 0
		186	#endif
		187	#ifndef POSIX_FADV_DONTNEED
		188	# define POSIX_FADV_DONTNEED 0
		189	#endif
		190
		191	#if !HAVE_POSIX_FADVISE
		192	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		193	#endif
		194
		195	#ifndef POSIX_MADV_NORMAL
		196	# define POSIX_MADV_NORMAL 0
		197	#endif
		198	#ifndef POSIX_MADV_SEQUENTIAL
		199	# define POSIX_MADV_SEQUENTIAL 0
		200	#endif
		201	#ifndef POSIX_MADV_RANDOM
		202	# define POSIX_MADV_RANDOM 0
		203	#endif
		204	#ifndef POSIX_MADV_WILLNEED
		205	# define POSIX_MADV_WILLNEED 0
		206	#endif
		207	#ifndef POSIX_MADV_DONTNEED
		208	# define POSIX_MADV_DONTNEED 0
		209	#endif
		210
		211	#if !HAVE_POSIX_MADVISE
		212	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		213	#endif
		214
		215	#ifndef PROT_NONE
		216	# define PROT_NONE 0
		217	#endif
		218	#ifndef PROT_READ
		219	# define PROT_READ 0
		220	#endif
		221	#ifndef PROT_WRITE
		222	# define PROT_READ 0
		223	#endif
		224	#ifndef PROT_EXEC
		225	# define PROT_EXEC 0
		226	#endif
		227
		228	#ifndef ST_NODEV
		229	# define ST_NODEV 0
		230	#endif
		231	#ifndef ST_NOEXEC
		232	# define ST_NOEXEC 0
		233	#endif
		234	#ifndef ST_SYNCHRONOUS
		235	# define ST_SYNCHRONOUS 0
		236	#endif
		237	#ifndef ST_MANDLOCK
		238	# define ST_MANDLOCK 0
		239	#endif
		240	#ifndef ST_WRITE
		241	# define ST_WRITE 0
		242	#endif
		243	#ifndef ST_APPEND
		244	# define ST_APPEND 0
		245	#endif
		246	#ifndef ST_IMMUTABLE
		247	# define ST_IMMUTABLE 0
		248	#endif
		249	#ifndef ST_NOATIME
		250	# define ST_NOATIME 0
		251	#endif
		252	#ifndef ST_NODIRATIME
		253	# define ST_NODIRATIME 0
		254	#endif
		255	#ifndef ST_RELATIME
		256	# define ST_RELATIME 0
		257	#endif
		258
		259	#ifndef S_IFIFO
		260	# define S_IFIFO 0
		261	#endif
		262	#ifndef S_IFCHR
		263	# define S_IFCHR 0
		264	#endif
		265	#ifndef S_IFBLK
		266	# define S_IFBLK 0
		267	#endif
		268	#ifndef S_IFLNK
		269	# define S_IFLNK 0
		270	#endif
		271	#ifndef S_IFREG
		272	# define S_IFREG 0
		273	#endif
		274	#ifndef S_IFDIR
		275	# define S_IFDIR 0
		276	#endif
		277	#ifndef S_IFWHT
		278	# define S_IFWHT 0
		279	#endif
		280	#ifndef S_IFSOCK
		281	# define S_IFSOCK 0
		282	#endif
		283
		284	#ifndef MAP_ANONYMOUS
		285	# ifdef MAP_ANON
		286	# define MAP_ANONYMOUS MAP_ANON
31	# else	287	# else
32	# error sendfile support requested but not available	288	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	289	# endif
34	#endif	290	#endif
35		291	#ifndef MAP_HUGETLB
36	#if __ia64	292	# define MAP_HUGETLB 0
37	# define STACKSIZE 65536
38	#else
39	# define STACKSIZE 8192
40	#endif	293	#endif
		294	#ifndef MAP_LOCKED
		295	# define MAP_LOCKED 0
		296	#endif
		297	#ifndef MAP_NORESERVE
		298	# define MAP_NORESERVE 0
		299	#endif
		300	#ifndef MAP_POPULATE
		301	# define MAP_POPULATE 0
		302	#endif
		303	#ifndef MAP_NONBLOCK
		304	# define MAP_NONBLOCK 0
		305	#endif
		306
		307	#ifndef makedev
		308	# define makedev(maj,min) (((maj) << 8) | (min))
		309	#endif
		310	#ifndef major
		311	# define major(dev) ((dev) >> 8)
		312	#endif
		313	#ifndef minor
		314	# define minor(dev) ((dev) & 0xff)
		315	#endif
		316
		317	#ifndef PAGESIZE
		318	# define PAGESIZE sysconf (_SC_PAGESIZE)
		319	#endif
		320
		321	static int req_invoke (eio_req *req);
		322	#define EIO_FINISH(req) req_invoke (req)
		323	static void req_destroy (eio_req *grp);
		324	#define EIO_DESTROY(req) req_destroy (req)
41		325
42	enum {	326	enum {
43	REQ_QUIT,	327	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
44	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,
50	REQ_READDIR,
51	REQ_SYMLINK,
52	};	328	};
53		329
54	typedef struct aio_cb {	330	#include "libeio/eio.c"
55	struct aio_cb *volatile next;
56		331
57	int type;
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
		333	typedef eio_req *aio_req_ornot;
75		334
76	static int started, wanted;	335	static SV *on_next_submit;
77	static volatile int nreqs;	336	static int next_pri = EIO_PRI_DEFAULT;
78	static int max_outstanding = 1<<30;	337	static int max_outstanding;
79	static int respipe [2];
80		338
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	339	static s_epipe respipe;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		340
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	341	static void req_destroy (aio_req req);
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)	342	static void req_cancel (aio_req req);
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92		343
		344	static void want_poll (void)
		345	{
		346	/* write a dummy byte to the pipe so fh becomes ready */
		347	s_epipe_signal (&respipe);
		348	}
		349
		350	static void done_poll (void)
		351	{
		352	/* read any signals sent by the worker threads */
		353	s_epipe_drain (&respipe);
		354	}
		355
		356	/* must be called at most once */
		357	static SV *req_sv (aio_req req, HV *stash)
		358	{
93	if (req->fh)	359	if (!req->self)
94	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107
108	Safefree (req);
109	}
110
111	static void
112	poll_wait ()
113	{
114	if (nreqs && !ress)
115	{	360	{
116	fd_set rfd;	361	req->self = (SV *)newHV ();
117	FD_ZERO(&rfd);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
118	FD_SET(respipe [0], &rfd);
119
120	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	363	}
122	}
123		364
124	static int	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
125	poll_cb ()	366	}
126	{
127	dSP;
128	int count = 0;
129	int do_croak = 0;
130	aio_req req;
131		367
132	for (;;)	368	static aio_req SvAIO_REQ (SV *sv)
		369	{
		370	MAGIC *mg;
		371
		372	if (!SvROK (sv)
		373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		374	&& SvSTASH (SvRV (sv)) != aio_req_stash
		375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		376	croak ("object of class IO::AIO::REQ expected");
		377
		378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		379
		380	return mg ? (aio_req)mg->mg_ptr : 0;
		381	}
		382
		383	static void aio_grp_feed (aio_req grp)
		384	{
		385	if (grp->sv2 && SvOK (grp->sv2))
133	{	386	{
134	pthread_mutex_lock (&reslock);	387	dSP;
135	req = ress;
136		388
137	if (req)	389	ENTER;
		390	SAVETMPS;
		391	PUSHMARK (SP);
		392	XPUSHs (req_sv (grp, aio_grp_stash));
		393	PUTBACK;
		394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		395	SPAGAIN;
		396	FREETMPS;
		397	LEAVE;
		398	}
		399	}
		400
		401	static void req_submit (eio_req *req)
		402	{
		403	eio_submit (req);
		404
		405	if (expect_false (on_next_submit))
		406	{
		407	dSP;
		408	SV *cb = sv_2mortal (on_next_submit);
		409
		410	on_next_submit = 0;
		411
		412	PUSHMARK (SP);
		413	PUTBACK;
		414	call_sv (cb, G_DISCARD | G_EVAL);
		415	}
		416	}
		417
		418	static int req_invoke (eio_req *req)
		419	{
		420	if (req->flags & FLAG_SV2_RO_OFF)
		421	SvREADONLY_off (req->sv2);
		422
		423	if (!EIO_CANCELLED (req) && req->callback)
		424	{
		425	dSP;
		426	static SV *sv_result_cache; /* caches the result integer SV */
		427	SV *sv_result;
		428
		429	ENTER;
		430	SAVETMPS;
		431	PUSHMARK (SP);
		432	EXTEND (SP, 1);
		433
		434	/* do not recreate the result IV from scratch each time */
		435	if (expect_true (sv_result_cache))
138	{	436	{
139	ress = req->next;	437	sv_result = sv_result_cache; sv_result_cache = 0;
140		438	SvIV_set (sv_result, req->result);
141	if (!ress)	439	SvIOK_only (sv_result);
142	{
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147
148	rese = 0;
149	}
150	}
151
152	pthread_mutex_unlock (&reslock);
153
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);
235	}
236	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}
243
244	free_req (req);
245	}
246
247	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{
372	ssize_t res;
373	off_t ooffset;
374
375	pthread_mutex_lock (&preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381
382	return res;
383	}
384
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390
391	pthread_mutex_lock (&preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397
398	return res;
399	}
400	#endif
401
402	#if !HAVE_FDATASYNC
403	# define fdatasync fsync
404	#endif
405
406	#if !HAVE_READAHEAD
407	# define readahead aio_readahead
408
409	static ssize_t
410	readahead (int fd, off_t offset, size_t count)
411	{
412	char readahead_buf[4096];
413
414	while (count > 0)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}
484
485	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# else
505	res = -1;
506	errno = ENOSYS;
507	# endif
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	for (;;)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, 4096, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	}
545	}
546
547	return res;
548	}
549
550	/* read a full directory */
551	static int
552	scandir_ (const char *path, void **namesp)
553	{
554	DIR *dirp = opendir (path);
555	union
556	{
557	struct dirent d;
558	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
559	} u;
560	struct dirent *entp;
561	char *name, *names;
562	int memlen = 4096;
563	int memofs = 0;
564	int res = 0;
565	int errorno;
566
567	if (!dirp)
568	return -1;
569
570	names = malloc (memlen);
571
572	for (;;)
573	{
574	errno = 0, readdir_r (dirp, &u.d, &entp);
575
576	if (!entp)
577	break;
578
579	name = entp->d_name;
580
581	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
582	{
583	int len = strlen (name) + 1;
584
585	res++;
586
587	while (memofs + len > memlen)
588	{
589	memlen *= 2;
590	names = realloc (names, memlen);
591	if (!names)
592	break;
593	}
594
595	memcpy (names + memofs, name, len);
596	memofs += len;
597	}
598	}
599
600	errorno = errno;
601	closedir (dirp);
602
603	if (errorno)
604	{
605	free (names);
606	errno = errorno;
607	res = -1;
608	}
609
610	*namesp = (void *)names;
611	return res;
612	}
613
614	/*****************************************************************************/
615
616	static void *
617	aio_proc (void *thr_arg)
618	{
619	aio_req req;
620	int type;
621
622	do
623	{
624	pthread_mutex_lock (&reqlock);
625
626	for (;;)
627	{
628	req = reqs;
629
630	if (reqs)
631	{
632	reqs = reqs->next;
633	if (!reqs) reqe = 0;
634	}
635
636	if (req)
637	break;
638
639	pthread_cond_wait (&reqwait, &reqlock);
640	}
641
642	pthread_mutex_unlock (&reqlock);
643
644	errno = 0; /* strictly unnecessary */
645
646	type = req->type;
647
648	switch (type)
649	{
650	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
651	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
652
653	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
654	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
655
656	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
657	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
658	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
659
660	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
661	case REQ_CLOSE: req->result = close (req->fd); break;
662	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
663	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
664	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
665
666	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
667	case REQ_FSYNC: req->result = fsync (req->fd); break;
668	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
669
670	case REQ_QUIT:
671	break;
672
673	default:
674	req->result = ENOSYS;
675	break;
676	}
677
678	req->errorno = errno;
679
680	pthread_mutex_lock (&reslock);
681
682	req->next = 0;
683
684	if (rese)
685	{
686	rese->next = req;
687	rese = req;
688	}	440	}
689	else	441	else
690	{	442	{
691	rese = ress = req;	443	sv_result = newSViv (req->result);
692		444	SvREADONLY_on (sv_result);
693	/* write a dummy byte to the pipe so fh becomes ready */
694	write (respipe [1], &respipe, 1);
695	}	445	}
696		446
697	pthread_mutex_unlock (&reslock);	447	switch (req->type)
		448	{
		449	case EIO_READDIR:
		450	{
		451	SV *rv = &PL_sv_undef;
		452
		453	if (req->result >= 0)
		454	{
		455	int i;
		456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		458	AV *av = newAV ();
		459
		460	av_extend (av, req->result - 1);
		461
		462	for (i = 0; i < req->result; ++i)
		463	{
		464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		467
		468	if (req->int1 & EIO_READDIR_CUSTOM2)
		469	{
		470	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		471	AV *avent = newAV ();
		472
		473	av_extend (avent, 2);
		474
		475	if (!sv_type [ent->type])
		476	{
		477	sv_type [ent->type] = newSViv (ent->type);
		478	SvREADONLY_on (sv_type [ent->type]);
		479	}
		480
		481	av_store (avent, 0, namesv);
		482	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		483	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		484
		485	av_store (av, i, newRV_noinc ((SV *)avent));
		486	}
		487	else
		488	av_store (av, i, namesv);
		489
		490	++ent;
		491	}
		492	else
		493	{
		494	SV *name = newSVpv (names, 0);
		495	av_store (av, i, name);
		496	names += SvCUR (name) + 1;
		497	}
		498	}
		499
		500	rv = sv_2mortal (newRV_noinc ((SV *)av));
		501	}
		502
		503	PUSHs (rv);
		504
		505	if (req->int1 & EIO_READDIR_CUSTOM1)
		506	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		507	}
		508	break;
		509
		510	case EIO_OPEN:
		511	{
		512	/* convert fd to fh */
		513	SV *fh = &PL_sv_undef;
		514
		515	if (req->result >= 0)
		516	{
		517	GV *gv = (GV *)sv_newmortal ();
		518	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		519	char sym [64];
		520	int symlen;
		521
		522	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		523	gv_init (gv, aio_stash, sym, symlen, 0);
		524
		525	symlen = snprintf (
		526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
		537	PUSHs (fh);
		538	}
		539	break;
		540
		541	case EIO_STATVFS:
		542	case EIO_FSTATVFS:
		543	{
		544	SV *rv = &PL_sv_undef;
		545
		546	if (req->result >= 0)
		547	{
		548	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		549	HV *hv = newHV ();
		550
		551	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		552
		553	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		554	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		555	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		556	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		557	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		558	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		559	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		560	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		561	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		562	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		563	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		564	}
		565
		566	PUSHs (rv);
		567	}
		568
		569	break;
		570
		571	case EIO_GROUP:
		572	req->int1 = 2; /* mark group as finished */
		573
		574	if (req->sv1)
		575	{
		576	int i;
		577	AV *av = (AV *)req->sv1;
		578
		579	EXTEND (SP, AvFILL (av) + 1);
		580	for (i = 0; i <= AvFILL (av); ++i)
		581	PUSHs (*av_fetch (av, i, 0));
		582	}
		583	break;
		584
		585	case EIO_NOP:
		586	case EIO_BUSY:
		587	break;
		588
		589	case EIO_READLINK:
		590	if (req->result > 0)
		591	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		592	break;
		593
		594	case EIO_STAT:
		595	case EIO_LSTAT:
		596	case EIO_FSTAT:
		597	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		598	PL_laststatval = req->result;
		599	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		600	PUSHs (sv_result);
		601	break;
		602
		603	case EIO_READ:
		604	{
		605	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		606	*SvEND (req->sv2) = 0;
		607	SvPOK_only (req->sv2);
		608	SvSETMAGIC (req->sv2);
		609	PUSHs (sv_result);
		610	}
		611	break;
		612
		613	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		614	if (req->result > 0)
		615	SvIV_set (sv_result, 0);
		616	/* FALLTHROUGH */
		617
		618	default:
		619	PUSHs (sv_result);
		620	break;
		621	}
		622
		623	errno = req->errorno;
		624
		625	PUTBACK;
		626	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		627	SPAGAIN;
		628
		629	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		630	SvREFCNT_dec (sv_result);
		631	else
		632	sv_result_cache = sv_result;
		633
		634	FREETMPS;
		635	LEAVE;
		636
		637	PUTBACK;
698	}	638	}
699	while (type != REQ_QUIT);	639
		640	return !!SvTRUE (ERRSV);
		641	}
		642
		643	static void req_destroy (aio_req req)
		644	{
		645	if (req->self)
		646	{
		647	sv_unmagic (req->self, PERL_MAGIC_ext);
		648	SvREFCNT_dec (req->self);
		649	}
		650
		651	SvREFCNT_dec (req->sv1);
		652	SvREFCNT_dec (req->sv2);
		653	SvREFCNT_dec (req->callback);
		654
		655	Safefree (req);
		656	}
		657
		658	static void req_cancel_subs (aio_req grp)
		659	{
		660	aio_req sub;
		661
		662	if (grp->type != EIO_GROUP)
		663	return;
		664
		665	SvREFCNT_dec (grp->sv2);
		666	grp->sv2 = 0;
		667
		668	eio_grp_cancel (grp);
		669	}
		670
		671	static void
		672	create_respipe (void)
		673	{
		674	if (s_epipe_renew (&respipe))
		675	croak ("IO::AIO: unable to initialize result pipe");
		676	}
		677
		678	static void poll_wait (void)
		679	{
		680	while (eio_nreqs ())
		681	{
		682	int size;
		683
		684	X_LOCK (reslock);
		685	size = res_queue.size;
		686	X_UNLOCK (reslock);
		687
		688	if (size)
		689	return;
		690
		691	etp_maybe_start_thread ();
		692
		693	s_epipe_wait (&respipe);
		694	}
		695	}
		696
		697	static int poll_cb (void)
		698	{
		699	for (;;)
		700	{
		701	int res = eio_poll ();
		702
		703	if (res > 0)
		704	croak (0);
		705
		706	if (!max_outstanding || max_outstanding > eio_nreqs ())
		707	return res;
		708
		709	poll_wait ();
		710	}
		711	}
		712
		713	static void atfork_child (void)
		714	{
		715	create_respipe ();
		716	}
		717
		718	/*****************************************************************************/
		719
		720	#if !_POSIX_MAPPED_FILES
		721	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		722	# define munmap(addr,length) (errno = ENOSYS, -1)
		723	#endif
		724
		725	#if !_POSIX_MEMORY_PROTECTION
		726	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		727	# define PROT_NONE 0
		728	# define PROT_WRITE 0
		729	# define MAP_PRIVATE 0
		730	# define MAP_SHARED 0
		731	# define MAP_FIXED 0
		732	#endif
		733
		734	#define MMAP_MAGIC PERL_MAGIC_ext
		735
		736	static int
		737	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		738	{
		739	int old_errno = errno;
		740	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		741	errno = old_errno;
		742
		743	mg->mg_obj = 0; /* just in case */
		744
		745	SvREADONLY_off (sv);
		746
		747	if (SvPVX (sv) != mg->mg_ptr)
		748	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		749
		750	SvCUR_set (sv, 0);
		751	SvPVX (sv) = 0;
		752	SvOK_off (sv);
700		753
701	return 0;	754	return 0;
702	}	755	}
703		756
		757	static MGVTBL mmap_vtbl = {
		758	0, 0, 0, 0, mmap_free
		759	};
		760
704	/*****************************************************************************/	761	/*****************************************************************************/
705		762
706	static void atfork_prepare (void)	763	static SV *
		764	get_cb (SV *cb_sv)
707	{	765	{
708	pthread_mutex_lock (&reqlock);	766	SvGETMAGIC (cb_sv);
709	pthread_mutex_lock (&reslock);	767	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
710	#if !HAVE_PREADWRITE
711	pthread_mutex_lock (&preadwritelock);
712	#endif
713	#if !HAVE_READDIR_R
714	pthread_mutex_lock (&readdirlock);
715	#endif
716	}
717
718	static void atfork_parent (void)
719	{
720	#if !HAVE_READDIR_R
721	pthread_mutex_unlock (&readdirlock);
722	#endif
723	#if !HAVE_PREADWRITE
724	pthread_mutex_unlock (&preadwritelock);
725	#endif
726	pthread_mutex_unlock (&reslock);
727	pthread_mutex_unlock (&reqlock);
728	}
729
730	static void atfork_child (void)
731	{
732	aio_req prv;
733
734	started = 0;
735
736	while (reqs)
737	{
738	prv = reqs;
739	reqs = prv->next;
740	free_req (prv);
741	}
742
743	reqs = reqe = 0;
744
745	while (ress)
746	{
747	prv = ress;
748	ress = prv->next;
749	free_req (prv);
750	}
751
752	ress = rese = 0;
753
754	close (respipe [0]);
755	close (respipe [1]);
756	create_pipe ();
757
758	atfork_parent ();
759	}	768	}
760		769
761	#define dREQ \	770	#define dREQ \
		771	SV *cb_cv; \
762	aio_req req; \	772	aio_req req; \
		773	int req_pri = next_pri; \
		774	next_pri = EIO_PRI_DEFAULT; \
763	\	775	\
764	if (SvOK (callback) && !SvROK (callback)) \	776	cb_cv = get_cb (callback); \
765	croak ("clalback must be undef or of reference type"); \
766	\	777	\
767	Newz (0, req, 1, aio_cb); \	778	Newz (0, req, 1, eio_req); \
768	if (!req) \	779	if (!req) \
769	croak ("out of memory during aio_req allocation"); \	780	croak ("out of memory during eio_req allocation"); \
770	\	781	\
771	req->callback = newSVsv (callback);	782	req->callback = SvREFCNT_inc (cb_cv); \
772		783	req->pri = req_pri
		784
		785	#define REQ_SEND \
		786	PUTBACK; \
		787	req_submit (req); \
		788	SPAGAIN; \
		789	\
		790	if (GIMME_V != G_VOID) \
		791	XPUSHs (req_sv (req, aio_req_stash));
		792
773	MODULE = IO::AIO PACKAGE = IO::AIO	793	MODULE = IO::AIO PACKAGE = IO::AIO
774		794
775	PROTOTYPES: ENABLE	795	PROTOTYPES: ENABLE
776		796
777	BOOT:	797	BOOT:
778	{	798	{
		799	static const struct {
		800	const char *name;
		801	IV iv;
		802	} *civ, const_iv[] = {
		803	# define const_niv(name, value) { # name, (IV) value },
		804	# define const_iv(name) { # name, (IV) name },
		805	# define const_eio(name) { # name, (IV) EIO_ ## name },
		806	const_iv (EXDEV)
		807	const_iv (ENOSYS)
		808	const_iv (O_RDONLY)
		809	const_iv (O_WRONLY)
		810	const_iv (O_RDWR)
		811	const_iv (O_CREAT)
		812	const_iv (O_TRUNC)
		813	const_iv (O_EXCL)
		814	const_iv (O_APPEND)
		815
		816	const_iv (O_ASYNC)
		817	const_iv (O_DIRECT)
		818	const_iv (O_NOATIME)
		819
		820	const_iv (O_CLOEXEC)
		821	const_iv (O_NOCTTY)
		822	const_iv (O_NOFOLLOW)
		823	const_iv (O_NONBLOCK)
		824	const_iv (O_EXEC)
		825	const_iv (O_SEARCH)
		826	const_iv (O_DIRECTORY)
		827	const_iv (O_DSYNC)
		828	const_iv (O_RSYNC)
		829	const_iv (O_SYNC)
		830	const_iv (O_TTY_INIT)
		831
		832	const_iv (S_IFIFO)
		833	const_iv (S_IFCHR)
		834	const_iv (S_IFBLK)
		835	const_iv (S_IFLNK)
		836	const_iv (S_IFREG)
		837	const_iv (S_IFDIR)
		838	const_iv (S_IFWHT)
		839	const_iv (S_IFSOCK)
		840	const_iv (S_IFMT)
		841
		842	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		843	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		844	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		845	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		846	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		847	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		848
		849	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		850	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		851	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		852	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		853	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		854
		855	const_iv (ST_RDONLY)
		856	const_iv (ST_NOSUID)
		857	const_iv (ST_NODEV)
		858	const_iv (ST_NOEXEC)
		859	const_iv (ST_SYNCHRONOUS)
		860	const_iv (ST_MANDLOCK)
		861	const_iv (ST_WRITE)
		862	const_iv (ST_APPEND)
		863	const_iv (ST_IMMUTABLE)
		864	const_iv (ST_NOATIME)
		865	const_iv (ST_NODIRATIME)
		866	const_iv (ST_RELATIME)
		867
		868	const_iv (PROT_NONE)
		869	const_iv (PROT_EXEC)
		870	const_iv (PROT_READ)
		871	const_iv (PROT_WRITE)
		872
		873	/*const_iv (MAP_FIXED)*/
		874	const_iv (MAP_PRIVATE)
		875	const_iv (MAP_SHARED)
		876	const_iv (MAP_ANONYMOUS)
		877
		878	/* linuxish */
		879	const_iv (MAP_HUGETLB)
		880	const_iv (MAP_LOCKED)
		881	const_iv (MAP_NORESERVE)
		882	const_iv (MAP_POPULATE)
		883	const_iv (MAP_NONBLOCK)
		884
		885	const_eio (MCL_FUTURE)
		886	const_eio (MCL_CURRENT)
		887
		888	const_eio (MS_ASYNC)
		889	const_eio (MS_INVALIDATE)
		890	const_eio (MS_SYNC)
		891
		892	const_eio (MT_MODIFY)
		893
		894	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		895	const_eio (SYNC_FILE_RANGE_WRITE)
		896	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		897
		898	const_eio (READDIR_DENTS)
		899	const_eio (READDIR_DIRS_FIRST)
		900	const_eio (READDIR_STAT_ORDER)
		901	const_eio (READDIR_FOUND_UNKNOWN)
		902
		903	const_eio (DT_UNKNOWN)
		904	const_eio (DT_FIFO)
		905	const_eio (DT_CHR)
		906	const_eio (DT_DIR)
		907	const_eio (DT_BLK)
		908	const_eio (DT_REG)
		909	const_eio (DT_LNK)
		910	const_eio (DT_SOCK)
		911	const_eio (DT_WHT)
		912	};
		913
		914	aio_stash = gv_stashpv ("IO::AIO" , 1);
		915	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		916	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		917
		918	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		919	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		920
		921	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		922
779	create_pipe ();	923	create_respipe ();
780	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
781	}
782		924
		925	if (eio_init (want_poll, done_poll) < 0)
		926	croak ("IO::AIO: unable to initialise eio library");
		927
		928	/* atfork child called in fifo order, so before eio's handler */
		929	X_THREAD_ATFORK (0, 0, atfork_child);
		930	}
		931
783	void	932	void
784	min_parallel(nthreads)	933	max_poll_reqs (unsigned int nreqs)
785	int nthreads
786	PROTOTYPE: $	934	PROTOTYPE: $
		935	CODE:
		936	eio_set_max_poll_reqs (nreqs);
787		937
788	void	938	void
789	max_parallel(nthreads)	939	max_poll_time (double nseconds)
790	int nthreads
791	PROTOTYPE: $	940	PROTOTYPE: $
792
793	int
794	max_outstanding(nreqs)
795	int nreqs
796	PROTOTYPE: $
797	CODE:	941	CODE:
798	RETVAL = max_outstanding;	942	eio_set_max_poll_time (nseconds);
		943
		944	void
		945	min_parallel (unsigned int nthreads)
		946	PROTOTYPE: $
		947	CODE:
		948	eio_set_min_parallel (nthreads);
		949
		950	void
		951	max_parallel (unsigned int nthreads)
		952	PROTOTYPE: $
		953	CODE:
		954	eio_set_max_parallel (nthreads);
		955
		956	void
		957	max_idle (unsigned int nthreads)
		958	PROTOTYPE: $
		959	CODE:
		960	eio_set_max_idle (nthreads);
		961
		962	void
		963	idle_timeout (unsigned int seconds)
		964	PROTOTYPE: $
		965	CODE:
		966	eio_set_idle_timeout (seconds);
		967
		968	void
		969	max_outstanding (unsigned int maxreqs)
		970	PROTOTYPE: $
		971	CODE:
799	max_outstanding = nreqs;	972	max_outstanding = maxreqs;
800		973
801	void	974	void
802	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	975	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
803	SV * pathname
804	int flags
805	int mode
806	SV * callback
807	PROTOTYPE: $$$;$
808	CODE:	976	PPCODE:
809	{	977	{
810	dREQ;	978	dREQ;
811		979
812	req->type = REQ_OPEN;	980	req->type = EIO_OPEN;
813	req->data = newSVsv (pathname);	981	req->sv1 = newSVsv (pathname);
814	req->dataptr = SvPVbyte_nolen (req->data);	982	req->ptr1 = SvPVbyte_nolen (req->sv1);
815	req->fd = flags;	983	req->int1 = flags;
816	req->mode = mode;	984	req->int2 = mode;
817		985
818	send_req (req);	986	REQ_SEND;
819	}	987	}
820		988
821	void	989	void
822	aio_close(fh,callback=&PL_sv_undef)	990	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
823	SV * fh
824	SV * callback
825	PROTOTYPE: $;$
826	ALIAS:	991	ALIAS:
827	aio_close = REQ_CLOSE
828	aio_fsync = REQ_FSYNC	992	aio_fsync = EIO_FSYNC
829	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = EIO_FDATASYNC
830	CODE:	994	PPCODE:
831	{	995	{
		996	int fd = s_fileno_croak (fh, 0);
832	dREQ;	997	dREQ;
833		998
834	req->type = ix;	999	req->type = ix;
835	req->fh = newSVsv (fh);	1000	req->sv1 = newSVsv (fh);
836	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1001	req->int1 = fd;
837		1002
838	send_req (req);	1003	REQ_SEND (req);
839	}	1004	}
840		1005
841	void	1006	void
		1007	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1008	PPCODE:
		1009	{
		1010	int fd = s_fileno_croak (fh, 0);
		1011	dREQ;
		1012
		1013	req->type = EIO_SYNC_FILE_RANGE;
		1014	req->sv1 = newSVsv (fh);
		1015	req->int1 = fd;
		1016	req->offs = offset;
		1017	req->size = nbytes;
		1018	req->int2 = flags;
		1019
		1020	REQ_SEND (req);
		1021	}
		1022
		1023	void
		1024	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1025	PPCODE:
		1026	{
		1027	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		1028	int fd = s_fileno_croak (fh, 0);
		1029	dREQ;
		1030
		1031	if (close_pipe < 0)
		1032	{
		1033	int pipefd [2];
		1034
		1035	if (pipe (pipefd) < 0
		1036	|| close (pipefd [1]) < 0
		1037	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1038	abort (); /*D*/
		1039
		1040	close_pipe = pipefd [0];
		1041	}
		1042
		1043	req->type = EIO_DUP2;
		1044	req->int1 = close_pipe;
		1045	req->sv2 = newSVsv (fh);
		1046	req->int2 = fd;
		1047
		1048	REQ_SEND (req);
		1049	}
		1050
		1051	void
842	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1052	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
843	SV * fh
844	UV offset
845	UV length
846	SV * data
847	UV dataoffset
848	SV * callback
849	ALIAS:	1053	ALIAS:
850	aio_read = REQ_READ	1054	aio_read = EIO_READ
851	aio_write = REQ_WRITE	1055	aio_write = EIO_WRITE
852	PROTOTYPE: $$$$$;$
853	CODE:	1056	PPCODE:
854	{	1057	{
855	aio_req req;
856	STRLEN svlen;	1058	STRLEN svlen;
		1059	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
857	char *svptr = SvPVbyte (data, svlen);	1060	char *svptr = SvPVbyte (data, svlen);
858		1061	UV len = SvUV (length);
859	SvUPGRADE (data, SVt_PV);
860	SvPOK_on (data);
861		1062
862	if (dataoffset < 0)	1063	if (dataoffset < 0)
863	dataoffset += svlen;	1064	dataoffset += svlen;
864		1065
865	if (dataoffset < 0 || dataoffset > svlen)	1066	if (dataoffset < 0 || dataoffset > svlen)
866	croak ("data offset outside of string");	1067	croak ("dataoffset outside of data scalar");
867		1068
868	if (ix == REQ_WRITE)	1069	if (ix == EIO_WRITE)
869	{	1070	{
870	/* write: check length and adjust. */	1071	/* write: check length and adjust. */
871	if (length < 0 || length + dataoffset > svlen)	1072	if (!SvOK (length) || len + dataoffset > svlen)
872	length = svlen - dataoffset;	1073	len = svlen - dataoffset;
873	}	1074	}
874	else	1075	else
875	{	1076	{
876	/* read: grow scalar as necessary */	1077	/* read: check type and grow scalar as necessary */
		1078	SvUPGRADE (data, SVt_PV);
877	svptr = SvGROW (data, length + dataoffset);	1079	svptr = SvGROW (data, len + dataoffset + 1);
878	}	1080	}
879
880	if (length < 0)
881	croak ("length must not be negative");
882		1081
883	{	1082	{
884	dREQ;	1083	dREQ;
885		1084
886	req->type = ix;	1085	req->type = ix;
887	req->fh = newSVsv (fh);	1086	req->sv1 = newSVsv (fh);
888	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1087	req->int1 = fd;
889	: IoOFP (sv_2io (fh)));	1088	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
890	req->offset = offset;	1089	req->size = len;
891	req->length = length;
892	req->data = SvREFCNT_inc (data);	1090	req->sv2 = SvREFCNT_inc (data);
893	req->dataptr = (char *)svptr + dataoffset;	1091	req->ptr2 = (char *)svptr + dataoffset;
		1092	req->stroffset = dataoffset;
894		1093
895	if (!SvREADONLY (data))	1094	if (!SvREADONLY (data))
896	{	1095	{
897	SvREADONLY_on (data);	1096	SvREADONLY_on (data);
898	req->data2ptr = (void *)data;	1097	req->flags |= FLAG_SV2_RO_OFF;
899	}	1098	}
900		1099
901	send_req (req);	1100	REQ_SEND;
902	}	1101	}
903	}	1102	}
904		1103
905	void	1104	void
906	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1105	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
907	SV * out_fh
908	SV * in_fh
909	UV in_offset
910	UV length
911	SV * callback
912	PROTOTYPE: $$$$;$
913	CODE:	1106	PPCODE:
914	{	1107	{
		1108	SV *data;
		1109	dREQ;
		1110
		1111	req->type = EIO_READLINK;
		1112	req->sv1 = newSVsv (path);
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114
		1115	REQ_SEND;
		1116	}
		1117
		1118	void
		1119	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1120	PPCODE:
		1121	{
		1122	int ifd = s_fileno_croak (in_fh , 0);
		1123	int ofd = s_fileno_croak (out_fh, 1);
915	dREQ;	1124	dREQ;
916		1125
917	req->type = REQ_SENDFILE;	1126	req->type = EIO_SENDFILE;
918	req->fh = newSVsv (out_fh);	1127	req->sv1 = newSVsv (out_fh);
919	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1128	req->int1 = ofd;
920	req->fh2 = newSVsv (in_fh);	1129	req->sv2 = newSVsv (in_fh);
921	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1130	req->int2 = ifd;
922	req->offset = in_offset;	1131	req->offs = in_offset;
923	req->length = length;	1132	req->size = length;
924		1133
925	send_req (req);	1134	REQ_SEND;
926	}	1135	}
927		1136
928	void	1137	void
929	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1138	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
930	SV * fh
931	UV offset
932	IV length
933	SV * callback
934	PROTOTYPE: $$$;$
935	CODE:	1139	PPCODE:
936	{	1140	{
		1141	int fd = s_fileno_croak (fh, 0);
937	dREQ;	1142	dREQ;
938		1143
939	req->type = REQ_READAHEAD;	1144	req->type = EIO_READAHEAD;
940	req->fh = newSVsv (fh);	1145	req->sv1 = newSVsv (fh);
941	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1146	req->int1 = fd;
942	req->offset = offset;	1147	req->offs = offset;
943	req->length = length;	1148	req->size = length;
944		1149
945	send_req (req);	1150	REQ_SEND;
946	}	1151	}
947		1152
948	void	1153	void
949	aio_stat(fh_or_path,callback=&PL_sv_undef)	1154	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
950	SV * fh_or_path
951	SV * callback
952	ALIAS:	1155	ALIAS:
953	aio_stat = REQ_STAT	1156	aio_stat = EIO_STAT
954	aio_lstat = REQ_LSTAT	1157	aio_lstat = EIO_LSTAT
		1158	aio_statvfs = EIO_STATVFS
955	CODE:	1159	PPCODE:
956	{	1160	{
957	dREQ;	1161	dREQ;
958		1162
959	New (0, req->statdata, 1, Stat_t);	1163	req->sv1 = newSVsv (fh_or_path);
960	if (!req->statdata)
961	{
962	free_req (req);
963	croak ("out of memory during aio_req->statdata allocation");
964	}
965		1164
966	if (SvPOK (fh_or_path))	1165	if (SvPOK (req->sv1))
967	{	1166	{
968	req->type = ix;	1167	req->type = ix;
969	req->data = newSVsv (fh_or_path);
970	req->dataptr = SvPVbyte_nolen (req->data);	1168	req->ptr1 = SvPVbyte_nolen (req->sv1);
971	}	1169	}
972	else	1170	else
973	{	1171	{
974	req->type = REQ_FSTAT;	1172	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
975	req->fh = newSVsv (fh_or_path);
976	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1173	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
977	}	1174	}
978		1175
979	send_req (req);	1176	REQ_SEND;
980	}	1177	}
981		1178
		1179	UV
		1180	major (UV dev)
		1181	ALIAS:
		1182	minor = 1
		1183	CODE:
		1184	RETVAL = ix ? major (dev) : minor (dev);
		1185	OUTPUT:
		1186	RETVAL
		1187
		1188	UV
		1189	makedev (UV maj, UV min)
		1190	CODE:
		1191	RETVAL = makedev (maj, min);
		1192	OUTPUT:
		1193	RETVAL
		1194
982	void	1195	void
		1196	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1197	PPCODE:
		1198	{
		1199	dREQ;
		1200
		1201	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1202	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1203	req->sv1 = newSVsv (fh_or_path);
		1204
		1205	if (SvPOK (req->sv1))
		1206	{
		1207	req->type = EIO_UTIME;
		1208	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1209	}
		1210	else
		1211	{
		1212	req->type = EIO_FUTIME;
		1213	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1214	}
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
		1220	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1221	PPCODE:
		1222	{
		1223	dREQ;
		1224
		1225	req->sv1 = newSVsv (fh_or_path);
		1226	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1227
		1228	if (SvPOK (req->sv1))
		1229	{
		1230	req->type = EIO_TRUNCATE;
		1231	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1232	}
		1233	else
		1234	{
		1235	req->type = EIO_FTRUNCATE;
		1236	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1237	}
		1238
		1239	REQ_SEND;
		1240	}
		1241
		1242	void
		1243	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1244	ALIAS:
		1245	aio_chmod = EIO_CHMOD
		1246	aio_mkdir = EIO_MKDIR
		1247	PPCODE:
		1248	{
		1249	dREQ;
		1250
		1251	req->int2 = mode;
		1252	req->sv1 = newSVsv (fh_or_path);
		1253
		1254	if (SvPOK (req->sv1))
		1255	{
		1256	req->type = ix;
		1257	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1258	}
		1259	else
		1260	{
		1261	req->type = EIO_FCHMOD;
		1262	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1263	}
		1264
		1265	REQ_SEND;
		1266	}
		1267
		1268	void
		1269	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1270	PPCODE:
		1271	{
		1272	dREQ;
		1273
		1274	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1275	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1276	req->sv1 = newSVsv (fh_or_path);
		1277
		1278	if (SvPOK (req->sv1))
		1279	{
		1280	req->type = EIO_CHOWN;
		1281	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1282	}
		1283	else
		1284	{
		1285	req->type = EIO_FCHOWN;
		1286	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1287	}
		1288
		1289	REQ_SEND;
		1290	}
		1291
		1292	void
		1293	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1294	PPCODE:
		1295	{
		1296	dREQ;
		1297
		1298	req->type = EIO_READDIR;
		1299	req->sv1 = newSVsv (pathname);
		1300	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1301	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1302
		1303	if (flags & EIO_READDIR_DENTS)
		1304	req->int1 |= EIO_READDIR_CUSTOM2;
		1305
		1306	REQ_SEND;
		1307	}
		1308
		1309	void
983	aio_unlink(pathname,callback=&PL_sv_undef)	1310	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
984	SV * pathname
985	SV * callback
986	ALIAS:	1311	ALIAS:
987	aio_unlink = REQ_UNLINK	1312	aio_unlink = EIO_UNLINK
988	aio_rmdir = REQ_RMDIR	1313	aio_rmdir = EIO_RMDIR
		1314	aio_readdir = EIO_READDIR
989	CODE:	1315	PPCODE:
990	{	1316	{
991	dREQ;	1317	dREQ;
992		1318
993	req->type = ix;	1319	req->type = ix;
994	req->data = newSVsv (pathname);	1320	req->sv1 = newSVsv (pathname);
995	req->dataptr = SvPVbyte_nolen (req->data);	1321	req->ptr1 = SvPVbyte_nolen (req->sv1);
996
997	send_req (req);
998	}
999		1322
		1323	REQ_SEND;
		1324	}
		1325
1000	void	1326	void
1001	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1327	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1002	SV * oldpath	1328	ALIAS:
1003	SV * newpath	1329	aio_link = EIO_LINK
1004	SV * callback	1330	aio_symlink = EIO_SYMLINK
		1331	aio_rename = EIO_RENAME
1005	CODE:	1332	PPCODE:
1006	{	1333	{
1007	dREQ;	1334	dREQ;
1008		1335
1009	req->type = REQ_SYMLINK;	1336	req->type = ix;
1010	req->fh = newSVsv (oldpath);	1337	req->sv1 = newSVsv (oldpath);
1011	req->data2ptr = SvPVbyte_nolen (req->fh);	1338	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->data = newSVsv (newpath);	1339	req->sv2 = newSVsv (newpath);
1013	req->dataptr = SvPVbyte_nolen (req->data);	1340	req->ptr2 = SvPVbyte_nolen (req->sv2);
1014		1341
1015	send_req (req);	1342	REQ_SEND;
1016	}	1343	}
1017		1344
1018	void	1345	void
1019	aio_readdir(pathname,callback=&PL_sv_undef)	1346	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1020	SV * pathname
1021	SV * callback
1022	CODE:	1347	PPCODE:
1023	{	1348	{
1024	dREQ;	1349	dREQ;
1025		1350
1026	req->type = REQ_READDIR;	1351	req->type = EIO_MKNOD;
1027	req->data = newSVsv (pathname);	1352	req->sv1 = newSVsv (pathname);
1028	req->dataptr = SvPVbyte_nolen (req->data);	1353	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1354	req->int2 = (mode_t)mode;
		1355	req->offs = dev;
1029		1356
1030	send_req (req);	1357	REQ_SEND;
1031	}	1358	}
1032		1359
1033	void	1360	void
		1361	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1362	ALIAS:
		1363	aio_mtouch = EIO_MTOUCH
		1364	aio_msync = EIO_MSYNC
		1365	PPCODE:
		1366	{
		1367	STRLEN svlen;
		1368	char *svptr = SvPVbyte (data, svlen);
		1369	UV len = SvUV (length);
		1370
		1371	if (offset < 0)
		1372	offset += svlen;
		1373
		1374	if (offset < 0 || offset > svlen)
		1375	croak ("offset outside of scalar");
		1376
		1377	if (!SvOK (length) || len + offset > svlen)
		1378	len = svlen - offset;
		1379
		1380	{
		1381	dREQ;
		1382
		1383	req->type = ix;
		1384	req->sv2 = SvREFCNT_inc (data);
		1385	req->ptr2 = (char *)svptr + offset;
		1386	req->size = len;
		1387	req->int1 = flags;
		1388
		1389	REQ_SEND;
		1390	}
		1391	}
		1392
		1393	void
		1394	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	STRLEN svlen;
		1398	char *svptr = SvPVbyte (data, svlen);
		1399	UV len = SvUV (length);
		1400
		1401	if (offset < 0)
		1402	offset += svlen;
		1403
		1404	if (offset < 0 || offset > svlen)
		1405	croak ("offset outside of scalar");
		1406
		1407	if (!SvOK (length) || len + offset > svlen)
		1408	len = svlen - offset;
		1409
		1410	{
		1411	dREQ;
		1412
		1413	req->type = EIO_MLOCK;
		1414	req->sv2 = SvREFCNT_inc (data);
		1415	req->ptr2 = (char *)svptr + offset;
		1416	req->size = len;
		1417
		1418	REQ_SEND;
		1419	}
		1420	}
		1421
		1422	void
		1423	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1424	PPCODE:
		1425	{
		1426	dREQ;
		1427
		1428	req->type = EIO_MLOCKALL;
		1429	req->int1 = flags;
		1430
		1431	REQ_SEND;
		1432	}
		1433
		1434	void
		1435	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = EIO_BUSY;
		1441	req->nv1 = delay < 0. ? 0. : delay;
		1442
		1443	REQ_SEND;
		1444	}
		1445
		1446	void
		1447	aio_group (SV *callback=&PL_sv_undef)
		1448	PPCODE:
		1449	{
		1450	dREQ;
		1451
		1452	req->type = EIO_GROUP;
		1453
		1454	req_submit (req);
		1455	XPUSHs (req_sv (req, aio_grp_stash));
		1456	}
		1457
		1458	void
		1459	aio_nop (SV *callback=&PL_sv_undef)
		1460	ALIAS:
		1461	aio_nop = EIO_NOP
		1462	aio_sync = EIO_SYNC
		1463	PPCODE:
		1464	{
		1465	dREQ;
		1466
		1467	req->type = ix;
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	int
		1473	aioreq_pri (int pri = 0)
		1474	CODE:
		1475	RETVAL = next_pri;
		1476	if (items > 0)
		1477	{
		1478	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1479	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1480	next_pri = pri;
		1481	}
		1482	OUTPUT:
		1483	RETVAL
		1484
		1485	void
		1486	aioreq_nice (int nice = 0)
		1487	CODE:
		1488	nice = next_pri - nice;
		1489	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1490	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1491	next_pri = nice;
		1492
		1493	void
1034	flush()	1494	flush ()
1035	PROTOTYPE:
1036	CODE:	1495	CODE:
1037	while (nreqs)	1496	while (eio_nreqs ())
1038	{	1497	{
1039	poll_wait ();	1498	poll_wait ();
1040	poll_cb ();	1499	poll_cb ();
1041	}	1500	}
1042		1501
1043	void
1044	poll()
1045	PROTOTYPE:
1046	CODE:
1047	if (nreqs)
1048	{
1049	poll_wait ();
1050	poll_cb ();
1051	}
1052
1053	int	1502	int
1054	poll_fileno()	1503	poll ()
1055	PROTOTYPE:
1056	CODE:	1504	CODE:
1057	RETVAL = respipe [0];	1505	poll_wait ();
1058	OUTPUT:
1059	RETVAL
1060
1061	int
1062	poll_cb(...)
1063	PROTOTYPE:
1064	CODE:
1065	RETVAL = poll_cb ();	1506	RETVAL = poll_cb ();
1066	OUTPUT:	1507	OUTPUT:
1067	RETVAL	1508	RETVAL
1068		1509
1069	void
1070	poll_wait()
1071	PROTOTYPE:
1072	CODE:
1073	if (nreqs)
1074	poll_wait ();
1075
1076	int	1510	int
1077	nreqs()	1511	poll_fileno ()
1078	PROTOTYPE:
1079	CODE:	1512	CODE:
1080	RETVAL = nreqs;	1513	RETVAL = s_epipe_fd (&respipe);
1081	OUTPUT:	1514	OUTPUT:
1082	RETVAL	1515	RETVAL
1083		1516
		1517	int
		1518	poll_cb (...)
		1519	PROTOTYPE:
		1520	CODE:
		1521	RETVAL = poll_cb ();
		1522	OUTPUT:
		1523	RETVAL
		1524
		1525	void
		1526	poll_wait ()
		1527	CODE:
		1528	poll_wait ();
		1529
		1530	int
		1531	nreqs ()
		1532	CODE:
		1533	RETVAL = eio_nreqs ();
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
		1538	nready ()
		1539	CODE:
		1540	RETVAL = eio_nready ();
		1541	OUTPUT:
		1542	RETVAL
		1543
		1544	int
		1545	npending ()
		1546	CODE:
		1547	RETVAL = eio_npending ();
		1548	OUTPUT:
		1549	RETVAL
		1550
		1551	int
		1552	nthreads ()
		1553	CODE:
		1554	RETVAL = eio_nthreads ();
		1555	OUTPUT:
		1556	RETVAL
		1557
		1558	int
		1559	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1560	CODE:
		1561	RETVAL = posix_fadvise (fh, offset, length, advice);
		1562	OUTPUT:
		1563	RETVAL
		1564
		1565	ssize_t
		1566	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1567	CODE:
		1568	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1569	OUTPUT:
		1570	RETVAL
		1571
		1572	void
		1573	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1574	PPCODE:
		1575	sv_unmagic (scalar, MMAP_MAGIC);
		1576	{
		1577	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1578	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1579	if (addr == (void *)-1)
		1580	XSRETURN_NO;
		1581
		1582	sv_force_normal (scalar);
		1583
		1584	/* we store the length in mg_obj, as namlen is I32 :/ */
		1585	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1586	->mg_obj = (SV *)length;
		1587
		1588	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1589
		1590	if (!(prot & PROT_WRITE))
		1591	SvREADONLY_on (scalar);
		1592
		1593	if (SvLEN (scalar))
		1594	Safefree (SvPVX (scalar));
		1595
		1596	SvPVX (scalar) = (char *)addr;
		1597	SvCUR_set (scalar, length);
		1598	SvLEN_set (scalar, 0);
		1599	SvPOK_only (scalar);
		1600
		1601	XSRETURN_YES;
		1602	}
		1603
		1604	void
		1605	munmap (SV *scalar)
		1606	CODE:
		1607	sv_unmagic (scalar, MMAP_MAGIC);
		1608
		1609	int
		1610	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1611	ALIAS:
		1612	mprotect = 1
		1613	CODE:
		1614	{
		1615	STRLEN svlen;
		1616	void *addr = SvPVbyte (scalar, svlen);
		1617	size_t len = SvUV (length);
		1618
		1619	if (offset < 0)
		1620	offset += svlen;
		1621
		1622	if (offset < 0 || offset > svlen)
		1623	croak ("offset outside of scalar");
		1624
		1625	if (!SvOK (length) || len + offset > svlen)
		1626	len = svlen - offset;
		1627
		1628	addr = (void *)(((intptr_t)addr) + offset);
		1629	eio_page_align (&addr, &len);
		1630
		1631	switch (ix)
		1632	{
		1633	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1634	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1635	}
		1636	}
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	int
		1641	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1642	CODE:
		1643	{
		1644	STRLEN svlen;
		1645	void *addr = SvPVbyte (scalar, svlen);
		1646	size_t len = SvUV (length);
		1647
		1648	if (offset < 0)
		1649	offset += svlen;
		1650
		1651	if (offset < 0 || offset > svlen)
		1652	croak ("offset outside of scalar");
		1653
		1654	if (!SvOK (length) || len + offset > svlen)
		1655	len = svlen - offset;
		1656
		1657	addr = (void *)(((intptr_t)addr) + offset);
		1658	eio_page_align (&addr, &len);
		1659	#if _POSIX_MEMLOCK_RANGE
		1660	RETVAL = munlock (addr, len);
		1661	#else
		1662	RETVAL = ((errno = ENOSYS), -1);
		1663	#endif
		1664	}
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	int
		1669	munlockall ()
		1670	CODE:
		1671	#if _POSIX_MEMLOCK
		1672	munlockall ();
		1673	#else
		1674	RETVAL = -1;
		1675	errno = ENOSYS;
		1676	#endif
		1677	OUTPUT:
		1678	RETVAL
		1679
		1680	void _on_next_submit (SV *cb)
		1681	CODE:
		1682	SvREFCNT_dec (on_next_submit);
		1683	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1684
		1685	PROTOTYPES: DISABLE
		1686
		1687	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1688
		1689	void
		1690	cancel (aio_req_ornot req)
		1691	CODE:
		1692	eio_cancel (req);
		1693
		1694	void
		1695	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1696	PPCODE:
		1697	{
		1698	if (GIMME_V != G_VOID)
		1699	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1700
		1701	if (items > 1)
		1702	{
		1703	SV *cb_cv =get_cb (callback);
		1704
		1705	SvREFCNT_dec (req->callback);
		1706	req->callback = SvREFCNT_inc (cb_cv);
		1707	}
		1708	}
		1709
		1710	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1711
		1712	void
		1713	add (aio_req grp, ...)
		1714	PPCODE:
		1715	{
		1716	int i;
		1717
		1718	if (grp->int1 == 2)
		1719	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1720
		1721	for (i = 1; i < items; ++i )
		1722	{
		1723	aio_req req;
		1724
		1725	if (GIMME_V != G_VOID)
		1726	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1727
		1728	req = SvAIO_REQ (ST (i));
		1729
		1730	if (req)
		1731	eio_grp_add (grp, req);
		1732	}
		1733	}
		1734
		1735	void
		1736	cancel_subs (aio_req_ornot req)
		1737	CODE:
		1738	req_cancel_subs (req);
		1739
		1740	void
		1741	result (aio_req grp, ...)
		1742	CODE:
		1743	{
		1744	int i;
		1745	AV *av;
		1746
		1747	grp->errorno = errno;
		1748
		1749	av = newAV ();
		1750	av_extend (av, items - 1);
		1751
		1752	for (i = 1; i < items; ++i )
		1753	av_push (av, newSVsv (ST (i)));
		1754
		1755	SvREFCNT_dec (grp->sv1);
		1756	grp->sv1 = (SV *)av;
		1757	}
		1758
		1759	void
		1760	errno (aio_req grp, int errorno = errno)
		1761	CODE:
		1762	grp->errorno = errorno;
		1763
		1764	void
		1765	limit (aio_req grp, int limit)
		1766	CODE:
		1767	eio_grp_limit (grp, limit);
		1768
		1769	void
		1770	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1771	CODE:
		1772	{
		1773	SvREFCNT_dec (grp->sv2);
		1774	grp->sv2 = newSVsv (callback);
		1775	grp->feed = aio_grp_feed;
		1776
		1777	if (grp->int2 <= 0)
		1778	grp->int2 = 2;
		1779
		1780	eio_grp_limit (grp, grp->int2);
		1781	}
		1782

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