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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.40 by root, Sat Jun 24 16:27:02 2006 UTC vs.
Revision 1.183 by root, Tue Jul 5 09:24:11 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	/* used for struct dirent, AIX doesn't provide it */	292	# define MAP_HUGETLB 0
37	#ifndef NAME_MAX
38	# define NAME_MAX 4096
39	#endif	293	#endif
40		294	#ifndef MAP_LOCKED
41	#if __ia64	295	# define MAP_LOCKED 0
42	# define STACKSIZE 65536
43	#else
44	# define STACKSIZE 8192
45	#endif	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)
46		325
47	enum {	326	enum {
48	REQ_QUIT,	327	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
49	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55	REQ_READDIR,
56	REQ_LINK, REQ_SYMLINK,
57	};	328	};
58		329
59	typedef struct aio_cb {	330	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		331
62	int type;
63
64	/* should receive a cleanup, with unions */
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75
76	Stat_t *statdata;
77	} aio_cb;
78
79	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
		333	typedef eio_req *aio_req_ornot;
80		334
81	static int started, wanted;	335	static SV *on_next_submit;
82	static volatile int nreqs;	336	static int next_pri = EIO_PRI_DEFAULT;
83	static int max_outstanding = 1<<30;	337	static int max_outstanding;
84	static int respipe [2];
85		338
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	339	static s_epipe respipe;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		340
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	341	static void req_destroy (aio_req req);
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)	342	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		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	{
98	if (req->fh)	359	if (!req->self)
99	SvREFCNT_dec (req->fh);
100
101	if (req->fh2)
102	SvREFCNT_dec (req->fh2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112
113	Safefree (req);
114	}
115
116	static void
117	poll_wait ()
118	{
119	if (nreqs && !ress)
120	{	360	{
121	fd_set rfd;	361	req->self = (SV *)newHV ();
122	FD_ZERO(&rfd);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
123	FD_SET(respipe [0], &rfd);
124
125	select (respipe [0] + 1, &rfd, 0, 0, 0);
126	}	363	}
127	}
128		364
129	static int	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
130	poll_cb ()	366	}
131	{
132	dSP;
133	int count = 0;
134	int do_croak = 0;
135	aio_req req;
136		367
137	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))
138	{	386	{
139	pthread_mutex_lock (&reslock);	387	dSP;
140	req = ress;
141		388
142	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))
143	{	436	{
144	ress = req->next;	437	sv_result = sv_result_cache; sv_result_cache = 0;
145		438	SvIV_set (sv_result, req->result);
146	if (!ress)	439	SvIOK_only (sv_result);
147	{
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152
153	rese = 0;
154	}
155	}
156
157	pthread_mutex_unlock (&reslock);
158
159	if (!req)
160	break;
161
162	nreqs--;
163
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);
240	}
241	}
242
243	LEAVE;
244
245	errno = errorno;
246	count++;
247	}
248
249	free_req (req);
250	}
251
252	return count;
253	}
254
255	static void *aio_proc(void *arg);
256
257	static void
258	start_thread (void)
259	{
260	sigset_t fullsigset, oldsigset;
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}
276
277	static void
278	send_req (aio_req req)
279	{
280	while (started < wanted && nreqs >= started)
281	start_thread ();
282
283	nreqs++;
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}
347
348	static void create_pipe ()
349	{
350	if (pipe (respipe))
351	croak ("unable to initialize result pipe");
352
353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
354	croak ("cannot set result pipe to nonblocking mode");
355
356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
357	croak ("cannot set result pipe to nonblocking mode");
358	}
359
360	/*****************************************************************************/
361	/* work around various missing functions */
362
363	#if !HAVE_PREADWRITE
364	# define pread aio_pread
365	# define pwrite aio_pwrite
366
367	/*
368	* make our pread/pwrite safe against themselves, but not against
369	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.
371	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374	static ssize_t
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{
377	ssize_t res;
378	off_t ooffset;
379
380	pthread_mutex_lock (&preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386
387	return res;
388	}
389
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395
396	pthread_mutex_lock (&preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);
402
403	return res;
404	}
405	#endif
406
407	#if !HAVE_FDATASYNC
408	# define fdatasync fsync
409	#endif
410
411	#if !HAVE_READAHEAD
412	# define readahead aio_readahead
413
414	static ssize_t
415	readahead (int fd, off_t offset, size_t count)
416	{
417	char readahead_buf[4096];
418
419	while (count > 0)
420	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
422
423	pread (fd, readahead_buf, len, offset);
424	offset += len;
425	count -= len;
426	}
427
428	errno = 0;
429	}
430	#endif
431
432	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r
434
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{
440	struct dirent *e;
441	int errorno;
442
443	pthread_mutex_lock (&readdirlock);
444
445	e = readdir (dirp);
446	errorno = errno;
447
448	if (e)
449	{
450	*res = ent;
451	strcpy (ent->d_name, e->d_name);
452	}
453	else
454	*res = 0;
455
456	pthread_mutex_unlock (&readdirlock);
457
458	errno = errorno;
459	return e ? 0 : -1;
460	}
461	#endif
462
463	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466	{
467	ssize_t res;
468
469	if (!count)
470	return 0;
471
472	#if HAVE_SENDFILE
473	# if __linux
474	res = sendfile (ofd, ifd, &offset, count);
475
476	# elif __freebsd
477	/*
478	* Of course, the freebsd sendfile is a dire hack with no thoughts
479	* wasted on making it similar to other I/O functions.
480	*/
481	{
482	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484
485	if (res < 0 && sbytes)
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487	res = sbytes;
488	}
489
490	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492
493	# elif __solaris
494	{
495	struct sendfilevec vec;
496	size_t sbytes;
497
498	vec.sfv_fd = ifd;
499	vec.sfv_flag = 0;
500	vec.sfv_off = offset;
501	vec.sfv_len = count;
502
503	res = sendfilev (ofd, &vec, 1, &sbytes);
504
505	if (res < 0 && sbytes)
506	res = sbytes;
507	}
508
509	# endif
510	#else
511	res = -1;
512	errno = ENOSYS;
513	#endif
514
515	if (res < 0
516	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517	#if __solaris
518	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
519	#endif
520	)
521	)
522	{
523	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];
525	res = 0;
526
527	while (count)
528	{
529	ssize_t cnt;
530
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
532
533	if (cnt <= 0)
534	{
535	if (cnt && !res) res = -1;
536	break;
537	}
538
539	cnt = write (ofd, buf, cnt);
540
541	if (cnt <= 0)
542	{
543	if (cnt && !res) res = -1;
544	break;
545	}
546
547	offset += cnt;
548	res += cnt;
549	count -= cnt;
550	}
551	}
552
553	return res;
554	}
555
556	/* read a full directory */
557	static int
558	scandir_ (const char *path, void **namesp)
559	{
560	DIR *dirp = opendir (path);
561	union
562	{
563	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;
566	struct dirent *entp;
567	char *name, *names;
568	int memlen = 4096;
569	int memofs = 0;
570	int res = 0;
571	int errorno;
572
573	if (!dirp)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
671	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
672	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
673
674	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
675	case REQ_FSYNC: req->result = fsync (req->fd); break;
676	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
677
678	case REQ_QUIT:
679	break;
680
681	default:
682	req->result = ENOSYS;
683	break;
684	}
685
686	req->errorno = errno;
687
688	pthread_mutex_lock (&reslock);
689
690	req->next = 0;
691
692	if (rese)
693	{
694	rese->next = req;
695	rese = req;
696	}	440	}
697	else	441	else
698	{	442	{
699	rese = ress = req;	443	sv_result = newSViv (req->result);
700		444	SvREADONLY_on (sv_result);
701	/* write a dummy byte to the pipe so fh becomes ready */
702	write (respipe [1], &respipe, 1);
703	}	445	}
704		446
705	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	case EIO_REALPATH:
		591	if (req->result > 0)
		592	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		593	break;
		594
		595	case EIO_STAT:
		596	case EIO_LSTAT:
		597	case EIO_FSTAT:
		598	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		599	PL_laststatval = req->result;
		600	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		601	PUSHs (sv_result);
		602	break;
		603
		604	case EIO_READ:
		605	{
		606	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		607	*SvEND (req->sv2) = 0;
		608	SvPOK_only (req->sv2);
		609	SvSETMAGIC (req->sv2);
		610	PUSHs (sv_result);
		611	}
		612	break;
		613
		614	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		615	if (req->result > 0)
		616	SvIV_set (sv_result, 0);
		617	/* FALLTHROUGH */
		618
		619	default:
		620	PUSHs (sv_result);
		621	break;
		622	}
		623
		624	errno = req->errorno;
		625
		626	PUTBACK;
		627	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		628	SPAGAIN;
		629
		630	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		631	SvREFCNT_dec (sv_result);
		632	else
		633	sv_result_cache = sv_result;
		634
		635	FREETMPS;
		636	LEAVE;
		637
		638	PUTBACK;
706	}	639	}
707	while (type != REQ_QUIT);	640
		641	return !!SvTRUE (ERRSV);
		642	}
		643
		644	static void req_destroy (aio_req req)
		645	{
		646	if (req->self)
		647	{
		648	sv_unmagic (req->self, PERL_MAGIC_ext);
		649	SvREFCNT_dec (req->self);
		650	}
		651
		652	SvREFCNT_dec (req->sv1);
		653	SvREFCNT_dec (req->sv2);
		654	SvREFCNT_dec (req->callback);
		655
		656	Safefree (req);
		657	}
		658
		659	static void req_cancel_subs (aio_req grp)
		660	{
		661	aio_req sub;
		662
		663	if (grp->type != EIO_GROUP)
		664	return;
		665
		666	SvREFCNT_dec (grp->sv2);
		667	grp->sv2 = 0;
		668
		669	eio_grp_cancel (grp);
		670	}
		671
		672	static void
		673	create_respipe (void)
		674	{
		675	if (s_epipe_renew (&respipe))
		676	croak ("IO::AIO: unable to initialize result pipe");
		677	}
		678
		679	static void poll_wait (void)
		680	{
		681	while (eio_nreqs ())
		682	{
		683	int size;
		684
		685	X_LOCK (reslock);
		686	size = res_queue.size;
		687	X_UNLOCK (reslock);
		688
		689	if (size)
		690	return;
		691
		692	etp_maybe_start_thread ();
		693
		694	s_epipe_wait (&respipe);
		695	}
		696	}
		697
		698	static int poll_cb (void)
		699	{
		700	for (;;)
		701	{
		702	int res = eio_poll ();
		703
		704	if (res > 0)
		705	croak (0);
		706
		707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
		709
		710	poll_wait ();
		711	}
		712	}
		713
		714	static void atfork_child (void)
		715	{
		716	create_respipe ();
		717	}
		718
		719	/*****************************************************************************/
		720
		721	#if !_POSIX_MAPPED_FILES
		722	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		723	# define munmap(addr,length) (errno = ENOSYS, -1)
		724	#endif
		725
		726	#if !_POSIX_MEMORY_PROTECTION
		727	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		728	# define PROT_NONE 0
		729	# define PROT_WRITE 0
		730	# define MAP_PRIVATE 0
		731	# define MAP_SHARED 0
		732	# define MAP_FIXED 0
		733	#endif
		734
		735	#define MMAP_MAGIC PERL_MAGIC_ext
		736
		737	static int
		738	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		739	{
		740	int old_errno = errno;
		741	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		742	errno = old_errno;
		743
		744	mg->mg_obj = 0; /* just in case */
		745
		746	SvREADONLY_off (sv);
		747
		748	if (SvPVX (sv) != mg->mg_ptr)
		749	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		750
		751	SvCUR_set (sv, 0);
		752	SvPVX (sv) = 0;
		753	SvOK_off (sv);
708		754
709	return 0;	755	return 0;
710	}	756	}
711		757
		758	static MGVTBL mmap_vtbl = {
		759	0, 0, 0, 0, mmap_free
		760	};
		761
712	/*****************************************************************************/	762	/*****************************************************************************/
713		763
714	static void atfork_prepare (void)	764	static SV *
		765	get_cb (SV *cb_sv)
715	{	766	{
716	pthread_mutex_lock (&reqlock);	767	SvGETMAGIC (cb_sv);
717	pthread_mutex_lock (&reslock);	768	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
718	#if !HAVE_PREADWRITE
719	pthread_mutex_lock (&preadwritelock);
720	#endif
721	#if !HAVE_READDIR_R
722	pthread_mutex_lock (&readdirlock);
723	#endif
724	}
725
726	static void atfork_parent (void)
727	{
728	#if !HAVE_READDIR_R
729	pthread_mutex_unlock (&readdirlock);
730	#endif
731	#if !HAVE_PREADWRITE
732	pthread_mutex_unlock (&preadwritelock);
733	#endif
734	pthread_mutex_unlock (&reslock);
735	pthread_mutex_unlock (&reqlock);
736	}
737
738	static void atfork_child (void)
739	{
740	aio_req prv;
741
742	started = 0;
743
744	while (reqs)
745	{
746	prv = reqs;
747	reqs = prv->next;
748	free_req (prv);
749	}
750
751	reqs = reqe = 0;
752
753	while (ress)
754	{
755	prv = ress;
756	ress = prv->next;
757	free_req (prv);
758	}
759
760	ress = rese = 0;
761
762	close (respipe [0]);
763	close (respipe [1]);
764	create_pipe ();
765
766	atfork_parent ();
767	}	769	}
768		770
769	#define dREQ \	771	#define dREQ \
		772	SV *cb_cv; \
770	aio_req req; \	773	aio_req req; \
		774	int req_pri = next_pri; \
		775	next_pri = EIO_PRI_DEFAULT; \
771	\	776	\
772	if (SvOK (callback) && !SvROK (callback)) \	777	cb_cv = get_cb (callback); \
773	croak ("clalback must be undef or of reference type"); \
774	\	778	\
775	Newz (0, req, 1, aio_cb); \	779	Newz (0, req, 1, eio_req); \
776	if (!req) \	780	if (!req) \
777	croak ("out of memory during aio_req allocation"); \	781	croak ("out of memory during eio_req allocation"); \
778	\	782	\
779	req->callback = newSVsv (callback);	783	req->callback = SvREFCNT_inc (cb_cv); \
780		784	req->pri = req_pri
		785
		786	#define REQ_SEND \
		787	PUTBACK; \
		788	req_submit (req); \
		789	SPAGAIN; \
		790	\
		791	if (GIMME_V != G_VOID) \
		792	XPUSHs (req_sv (req, aio_req_stash));
		793
781	MODULE = IO::AIO PACKAGE = IO::AIO	794	MODULE = IO::AIO PACKAGE = IO::AIO
782		795
783	PROTOTYPES: ENABLE	796	PROTOTYPES: ENABLE
784		797
785	BOOT:	798	BOOT:
786	{	799	{
		800	static const struct {
		801	const char *name;
		802	IV iv;
		803	} *civ, const_iv[] = {
		804	# define const_niv(name, value) { # name, (IV) value },
		805	# define const_iv(name) { # name, (IV) name },
		806	# define const_eio(name) { # name, (IV) EIO_ ## name },
		807	const_iv (EXDEV)
		808	const_iv (ENOSYS)
		809	const_iv (O_RDONLY)
		810	const_iv (O_WRONLY)
		811	const_iv (O_RDWR)
		812	const_iv (O_CREAT)
		813	const_iv (O_TRUNC)
		814	const_iv (O_EXCL)
		815	const_iv (O_APPEND)
		816
		817	const_iv (O_ASYNC)
		818	const_iv (O_DIRECT)
		819	const_iv (O_NOATIME)
		820
		821	const_iv (O_CLOEXEC)
		822	const_iv (O_NOCTTY)
		823	const_iv (O_NOFOLLOW)
		824	const_iv (O_NONBLOCK)
		825	const_iv (O_EXEC)
		826	const_iv (O_SEARCH)
		827	const_iv (O_DIRECTORY)
		828	const_iv (O_DSYNC)
		829	const_iv (O_RSYNC)
		830	const_iv (O_SYNC)
		831	const_iv (O_TTY_INIT)
		832
		833	const_iv (S_IFIFO)
		834	const_iv (S_IFCHR)
		835	const_iv (S_IFBLK)
		836	const_iv (S_IFLNK)
		837	const_iv (S_IFREG)
		838	const_iv (S_IFDIR)
		839	const_iv (S_IFWHT)
		840	const_iv (S_IFSOCK)
		841	const_iv (S_IFMT)
		842
		843	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		844	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		845	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		846	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		847	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		848	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		849
		850	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		851	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		852	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		853	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		854	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		855
		856	const_iv (ST_RDONLY)
		857	const_iv (ST_NOSUID)
		858	const_iv (ST_NODEV)
		859	const_iv (ST_NOEXEC)
		860	const_iv (ST_SYNCHRONOUS)
		861	const_iv (ST_MANDLOCK)
		862	const_iv (ST_WRITE)
		863	const_iv (ST_APPEND)
		864	const_iv (ST_IMMUTABLE)
		865	const_iv (ST_NOATIME)
		866	const_iv (ST_NODIRATIME)
		867	const_iv (ST_RELATIME)
		868
		869	const_iv (PROT_NONE)
		870	const_iv (PROT_EXEC)
		871	const_iv (PROT_READ)
		872	const_iv (PROT_WRITE)
		873
		874	/*const_iv (MAP_FIXED)*/
		875	const_iv (MAP_PRIVATE)
		876	const_iv (MAP_SHARED)
		877	const_iv (MAP_ANONYMOUS)
		878
		879	/* linuxish */
		880	const_iv (MAP_HUGETLB)
		881	const_iv (MAP_LOCKED)
		882	const_iv (MAP_NORESERVE)
		883	const_iv (MAP_POPULATE)
		884	const_iv (MAP_NONBLOCK)
		885
		886	const_eio (MCL_FUTURE)
		887	const_eio (MCL_CURRENT)
		888
		889	const_eio (MS_ASYNC)
		890	const_eio (MS_INVALIDATE)
		891	const_eio (MS_SYNC)
		892
		893	const_eio (MT_MODIFY)
		894
		895	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		896	const_eio (SYNC_FILE_RANGE_WRITE)
		897	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		898
		899	const_eio (READDIR_DENTS)
		900	const_eio (READDIR_DIRS_FIRST)
		901	const_eio (READDIR_STAT_ORDER)
		902	const_eio (READDIR_FOUND_UNKNOWN)
		903
		904	const_eio (DT_UNKNOWN)
		905	const_eio (DT_FIFO)
		906	const_eio (DT_CHR)
		907	const_eio (DT_DIR)
		908	const_eio (DT_BLK)
		909	const_eio (DT_REG)
		910	const_eio (DT_LNK)
		911	const_eio (DT_SOCK)
		912	const_eio (DT_WHT)
		913	};
		914
		915	aio_stash = gv_stashpv ("IO::AIO" , 1);
		916	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		917	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		918
		919	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		920	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		921
		922	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		923
787	create_pipe ();	924	create_respipe ();
788	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
789	}
790		925
		926	if (eio_init (want_poll, done_poll) < 0)
		927	croak ("IO::AIO: unable to initialise eio library");
		928
		929	/* atfork child called in fifo order, so before eio's handler */
		930	X_THREAD_ATFORK (0, 0, atfork_child);
		931	}
		932
791	void	933	void
792	min_parallel (nthreads)	934	max_poll_reqs (unsigned int nreqs)
793	int nthreads
794	PROTOTYPE: $	935	PROTOTYPE: $
		936	CODE:
		937	eio_set_max_poll_reqs (nreqs);
795		938
796	void	939	void
797	max_parallel (nthreads)	940	max_poll_time (double nseconds)
798	int nthreads
799	PROTOTYPE: $	941	PROTOTYPE: $
800
801	int
802	max_outstanding (nreqs)
803	int nreqs
804	PROTOTYPE: $
805	CODE:	942	CODE:
806	RETVAL = max_outstanding;	943	eio_set_max_poll_time (nseconds);
		944
		945	void
		946	min_parallel (unsigned int nthreads)
		947	PROTOTYPE: $
		948	CODE:
		949	eio_set_min_parallel (nthreads);
		950
		951	void
		952	max_parallel (unsigned int nthreads)
		953	PROTOTYPE: $
		954	CODE:
		955	eio_set_max_parallel (nthreads);
		956
		957	void
		958	max_idle (unsigned int nthreads)
		959	PROTOTYPE: $
		960	CODE:
		961	eio_set_max_idle (nthreads);
		962
		963	void
		964	idle_timeout (unsigned int seconds)
		965	PROTOTYPE: $
		966	CODE:
		967	eio_set_idle_timeout (seconds);
		968
		969	void
		970	max_outstanding (unsigned int maxreqs)
		971	PROTOTYPE: $
		972	CODE:
807	max_outstanding = nreqs;	973	max_outstanding = maxreqs;
808		974
809	void	975	void
810	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	976	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
811	SV * pathname
812	int flags
813	int mode
814	SV * callback
815	PROTOTYPE: $$$;$
816	CODE:	977	PPCODE:
817	{	978	{
818	dREQ;	979	dREQ;
819		980
820	req->type = REQ_OPEN;	981	req->type = EIO_OPEN;
821	req->data = newSVsv (pathname);	982	req->sv1 = newSVsv (pathname);
822	req->dataptr = SvPVbyte_nolen (req->data);	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
823	req->fd = flags;	984	req->int1 = flags;
824	req->mode = mode;	985	req->int2 = mode;
825		986
826	send_req (req);	987	REQ_SEND;
827	}	988	}
828		989
829	void	990	void
830	aio_close (fh,callback=&PL_sv_undef)	991	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
831	SV * fh
832	SV * callback
833	PROTOTYPE: $;$
834	ALIAS:	992	ALIAS:
835	aio_close = REQ_CLOSE
836	aio_fsync = REQ_FSYNC	993	aio_fsync = EIO_FSYNC
837	aio_fdatasync = REQ_FDATASYNC	994	aio_fdatasync = EIO_FDATASYNC
838	CODE:	995	PPCODE:
839	{	996	{
		997	int fd = s_fileno_croak (fh, 0);
840	dREQ;	998	dREQ;
841		999
842	req->type = ix;	1000	req->type = ix;
843	req->fh = newSVsv (fh);	1001	req->sv1 = newSVsv (fh);
844	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1002	req->int1 = fd;
845		1003
846	send_req (req);	1004	REQ_SEND (req);
847	}	1005	}
848		1006
849	void	1007	void
		1008	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1009	PPCODE:
		1010	{
		1011	int fd = s_fileno_croak (fh, 0);
		1012	dREQ;
		1013
		1014	req->type = EIO_SYNC_FILE_RANGE;
		1015	req->sv1 = newSVsv (fh);
		1016	req->int1 = fd;
		1017	req->offs = offset;
		1018	req->size = nbytes;
		1019	req->int2 = flags;
		1020
		1021	REQ_SEND (req);
		1022	}
		1023
		1024	void
		1025	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1026	PPCODE:
		1027	{
		1028	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		1029	int fd = s_fileno_croak (fh, 0);
		1030	dREQ;
		1031
		1032	if (close_pipe < 0)
		1033	{
		1034	int pipefd [2];
		1035
		1036	if (pipe (pipefd) < 0
		1037	|| close (pipefd [1]) < 0
		1038	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1039	abort (); /*D*/
		1040
		1041	close_pipe = pipefd [0];
		1042	}
		1043
		1044	req->type = EIO_DUP2;
		1045	req->int1 = close_pipe;
		1046	req->sv2 = newSVsv (fh);
		1047	req->int2 = fd;
		1048
		1049	REQ_SEND (req);
		1050	}
		1051
		1052	void
850	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1053	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
851	SV * fh
852	UV offset
853	UV length
854	SV * data
855	UV dataoffset
856	SV * callback
857	ALIAS:	1054	ALIAS:
858	aio_read = REQ_READ	1055	aio_read = EIO_READ
859	aio_write = REQ_WRITE	1056	aio_write = EIO_WRITE
860	PROTOTYPE: $$$$$;$
861	CODE:	1057	PPCODE:
862	{	1058	{
863	aio_req req;
864	STRLEN svlen;	1059	STRLEN svlen;
		1060	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
865	char *svptr = SvPVbyte (data, svlen);	1061	char *svptr = SvPVbyte (data, svlen);
866		1062	UV len = SvUV (length);
867	SvUPGRADE (data, SVt_PV);
868	SvPOK_on (data);
869		1063
870	if (dataoffset < 0)	1064	if (dataoffset < 0)
871	dataoffset += svlen;	1065	dataoffset += svlen;
872		1066
873	if (dataoffset < 0 || dataoffset > svlen)	1067	if (dataoffset < 0 || dataoffset > svlen)
874	croak ("data offset outside of string");	1068	croak ("dataoffset outside of data scalar");
875		1069
876	if (ix == REQ_WRITE)	1070	if (ix == EIO_WRITE)
877	{	1071	{
878	/* write: check length and adjust. */	1072	/* write: check length and adjust. */
879	if (length < 0 || length + dataoffset > svlen)	1073	if (!SvOK (length) || len + dataoffset > svlen)
880	length = svlen - dataoffset;	1074	len = svlen - dataoffset;
881	}	1075	}
882	else	1076	else
883	{	1077	{
884	/* read: grow scalar as necessary */	1078	/* read: check type and grow scalar as necessary */
		1079	SvUPGRADE (data, SVt_PV);
885	svptr = SvGROW (data, length + dataoffset);	1080	svptr = SvGROW (data, len + dataoffset + 1);
886	}	1081	}
887
888	if (length < 0)
889	croak ("length must not be negative");
890		1082
891	{	1083	{
892	dREQ;	1084	dREQ;
893		1085
894	req->type = ix;	1086	req->type = ix;
895	req->fh = newSVsv (fh);	1087	req->sv1 = newSVsv (fh);
896	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1088	req->int1 = fd;
897	: IoOFP (sv_2io (fh)));	1089	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
898	req->offset = offset;	1090	req->size = len;
899	req->length = length;
900	req->data = SvREFCNT_inc (data);	1091	req->sv2 = SvREFCNT_inc (data);
901	req->dataptr = (char *)svptr + dataoffset;	1092	req->ptr2 = (char *)svptr + dataoffset;
		1093	req->stroffset = dataoffset;
902		1094
903	if (!SvREADONLY (data))	1095	if (!SvREADONLY (data))
904	{	1096	{
905	SvREADONLY_on (data);	1097	SvREADONLY_on (data);
906	req->data2ptr = (void *)data;	1098	req->flags |= FLAG_SV2_RO_OFF;
907	}	1099	}
908		1100
909	send_req (req);	1101	REQ_SEND;
910	}	1102	}
911	}	1103	}
912		1104
913	void	1105	void
914	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1106	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
915	SV * out_fh	1107	ALIAS:
916	SV * in_fh	1108	aio_readlink = EIO_READLINK
917	UV in_offset	1109	aio_realpath = EIO_REALPATH
918	UV length
919	SV * callback
920	PROTOTYPE: $$$$;$
921	CODE:	1110	PPCODE:
922	{	1111	{
		1112	SV *data;
		1113	dREQ;
		1114
		1115	req->type = ix;
		1116	req->sv1 = newSVsv (path);
		1117	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1124	PPCODE:
		1125	{
		1126	int ifd = s_fileno_croak (in_fh , 0);
		1127	int ofd = s_fileno_croak (out_fh, 1);
923	dREQ;	1128	dREQ;
924		1129
925	req->type = REQ_SENDFILE;	1130	req->type = EIO_SENDFILE;
926	req->fh = newSVsv (out_fh);	1131	req->sv1 = newSVsv (out_fh);
927	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1132	req->int1 = ofd;
928	req->fh2 = newSVsv (in_fh);	1133	req->sv2 = newSVsv (in_fh);
929	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1134	req->int2 = ifd;
930	req->offset = in_offset;	1135	req->offs = in_offset;
931	req->length = length;	1136	req->size = length;
932		1137
933	send_req (req);	1138	REQ_SEND;
934	}	1139	}
935		1140
936	void	1141	void
937	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1142	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
938	SV * fh
939	UV offset
940	IV length
941	SV * callback
942	PROTOTYPE: $$$;$
943	CODE:	1143	PPCODE:
944	{	1144	{
		1145	int fd = s_fileno_croak (fh, 0);
945	dREQ;	1146	dREQ;
946		1147
947	req->type = REQ_READAHEAD;	1148	req->type = EIO_READAHEAD;
948	req->fh = newSVsv (fh);	1149	req->sv1 = newSVsv (fh);
949	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1150	req->int1 = fd;
950	req->offset = offset;	1151	req->offs = offset;
951	req->length = length;	1152	req->size = length;
952		1153
953	send_req (req);	1154	REQ_SEND;
954	}	1155	}
955		1156
956	void	1157	void
957	aio_stat (fh_or_path,callback=&PL_sv_undef)	1158	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
958	SV * fh_or_path
959	SV * callback
960	ALIAS:	1159	ALIAS:
961	aio_stat = REQ_STAT	1160	aio_stat = EIO_STAT
962	aio_lstat = REQ_LSTAT	1161	aio_lstat = EIO_LSTAT
		1162	aio_statvfs = EIO_STATVFS
963	CODE:	1163	PPCODE:
964	{	1164	{
965	dREQ;	1165	dREQ;
966		1166
967	New (0, req->statdata, 1, Stat_t);	1167	req->sv1 = newSVsv (fh_or_path);
968	if (!req->statdata)
969	{
970	free_req (req);
971	croak ("out of memory during aio_req->statdata allocation");
972	}
973		1168
974	if (SvPOK (fh_or_path))	1169	if (SvPOK (req->sv1))
975	{	1170	{
976	req->type = ix;	1171	req->type = ix;
977	req->data = newSVsv (fh_or_path);
978	req->dataptr = SvPVbyte_nolen (req->data);	1172	req->ptr1 = SvPVbyte_nolen (req->sv1);
979	}	1173	}
980	else	1174	else
981	{	1175	{
982	req->type = REQ_FSTAT;	1176	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
983	req->fh = newSVsv (fh_or_path);
984	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1177	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
985	}	1178	}
986		1179
987	send_req (req);	1180	REQ_SEND;
988	}	1181	}
989		1182
		1183	UV
		1184	major (UV dev)
		1185	ALIAS:
		1186	minor = 1
		1187	CODE:
		1188	RETVAL = ix ? major (dev) : minor (dev);
		1189	OUTPUT:
		1190	RETVAL
		1191
		1192	UV
		1193	makedev (UV maj, UV min)
		1194	CODE:
		1195	RETVAL = makedev (maj, min);
		1196	OUTPUT:
		1197	RETVAL
		1198
990	void	1199	void
		1200	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1201	PPCODE:
		1202	{
		1203	dREQ;
		1204
		1205	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1206	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1207	req->sv1 = newSVsv (fh_or_path);
		1208
		1209	if (SvPOK (req->sv1))
		1210	{
		1211	req->type = EIO_UTIME;
		1212	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1213	}
		1214	else
		1215	{
		1216	req->type = EIO_FUTIME;
		1217	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1218	}
		1219
		1220	REQ_SEND;
		1221	}
		1222
		1223	void
		1224	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1225	PPCODE:
		1226	{
		1227	dREQ;
		1228
		1229	req->sv1 = newSVsv (fh_or_path);
		1230	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1231
		1232	if (SvPOK (req->sv1))
		1233	{
		1234	req->type = EIO_TRUNCATE;
		1235	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1236	}
		1237	else
		1238	{
		1239	req->type = EIO_FTRUNCATE;
		1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1241	}
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	void
		1247	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1248	ALIAS:
		1249	aio_chmod = EIO_CHMOD
		1250	aio_mkdir = EIO_MKDIR
		1251	PPCODE:
		1252	{
		1253	dREQ;
		1254
		1255	req->int2 = mode;
		1256	req->sv1 = newSVsv (fh_or_path);
		1257
		1258	if (SvPOK (req->sv1))
		1259	{
		1260	req->type = ix;
		1261	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1262	}
		1263	else
		1264	{
		1265	req->type = EIO_FCHMOD;
		1266	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1267	}
		1268
		1269	REQ_SEND;
		1270	}
		1271
		1272	void
		1273	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1274	PPCODE:
		1275	{
		1276	dREQ;
		1277
		1278	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1279	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1280	req->sv1 = newSVsv (fh_or_path);
		1281
		1282	if (SvPOK (req->sv1))
		1283	{
		1284	req->type = EIO_CHOWN;
		1285	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1286	}
		1287	else
		1288	{
		1289	req->type = EIO_FCHOWN;
		1290	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1291	}
		1292
		1293	REQ_SEND;
		1294	}
		1295
		1296	void
		1297	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1298	PPCODE:
		1299	{
		1300	dREQ;
		1301
		1302	req->type = EIO_READDIR;
		1303	req->sv1 = newSVsv (pathname);
		1304	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1305	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1306
		1307	if (flags & EIO_READDIR_DENTS)
		1308	req->int1 |= EIO_READDIR_CUSTOM2;
		1309
		1310	REQ_SEND;
		1311	}
		1312
		1313	void
991	aio_unlink (pathname,callback=&PL_sv_undef)	1314	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
992	SV * pathname
993	SV * callback
994	ALIAS:	1315	ALIAS:
995	aio_unlink = REQ_UNLINK	1316	aio_unlink = EIO_UNLINK
996	aio_rmdir = REQ_RMDIR	1317	aio_rmdir = EIO_RMDIR
997	aio_readdir = REQ_READDIR	1318	aio_readdir = EIO_READDIR
998	CODE:	1319	PPCODE:
999	{	1320	{
1000	dREQ;	1321	dREQ;
1001		1322
1002	req->type = ix;	1323	req->type = ix;
1003	req->data = newSVsv (pathname);	1324	req->sv1 = newSVsv (pathname);
1004	req->dataptr = SvPVbyte_nolen (req->data);	1325	req->ptr1 = SvPVbyte_nolen (req->sv1);
1005
1006	send_req (req);
1007	}
1008		1326
		1327	REQ_SEND;
		1328	}
		1329
1009	void	1330	void
1010	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1331	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1011	SV * oldpath
1012	SV * newpath
1013	SV * callback
1014	ALIAS:	1332	ALIAS:
1015	aio_link = REQ_LINK	1333	aio_link = EIO_LINK
1016	aio_symlink = REQ_SYMLINK	1334	aio_symlink = EIO_SYMLINK
1017	aio_rename = REQ_RENAME	1335	aio_rename = EIO_RENAME
1018	CODE:	1336	PPCODE:
1019	{	1337	{
1020	dREQ;	1338	dREQ;
1021		1339
1022	req->type = ix;	1340	req->type = ix;
1023	req->fh = newSVsv (oldpath);	1341	req->sv1 = newSVsv (oldpath);
1024	req->data2ptr = SvPVbyte_nolen (req->fh);	1342	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	req->data = newSVsv (newpath);	1343	req->sv2 = newSVsv (newpath);
1026	req->dataptr = SvPVbyte_nolen (req->data);	1344	req->ptr2 = SvPVbyte_nolen (req->sv2);
1027		1345
1028	send_req (req);	1346	REQ_SEND;
1029	}	1347	}
		1348
		1349	void
		1350	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1351	PPCODE:
		1352	{
		1353	dREQ;
		1354
		1355	req->type = EIO_MKNOD;
		1356	req->sv1 = newSVsv (pathname);
		1357	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1358	req->int2 = (mode_t)mode;
		1359	req->offs = dev;
		1360
		1361	REQ_SEND;
		1362	}
		1363
		1364	void
		1365	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1366	ALIAS:
		1367	aio_mtouch = EIO_MTOUCH
		1368	aio_msync = EIO_MSYNC
		1369	PPCODE:
		1370	{
		1371	STRLEN svlen;
		1372	char *svptr = SvPVbyte (data, svlen);
		1373	UV len = SvUV (length);
		1374
		1375	if (offset < 0)
		1376	offset += svlen;
		1377
		1378	if (offset < 0 || offset > svlen)
		1379	croak ("offset outside of scalar");
		1380
		1381	if (!SvOK (length) || len + offset > svlen)
		1382	len = svlen - offset;
		1383
		1384	{
		1385	dREQ;
		1386
		1387	req->type = ix;
		1388	req->sv2 = SvREFCNT_inc (data);
		1389	req->ptr2 = (char *)svptr + offset;
		1390	req->size = len;
		1391	req->int1 = flags;
		1392
		1393	REQ_SEND;
		1394	}
		1395	}
		1396
		1397	void
		1398	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1399	PPCODE:
		1400	{
		1401	STRLEN svlen;
		1402	char *svptr = SvPVbyte (data, svlen);
		1403	UV len = SvUV (length);
		1404
		1405	if (offset < 0)
		1406	offset += svlen;
		1407
		1408	if (offset < 0 || offset > svlen)
		1409	croak ("offset outside of scalar");
		1410
		1411	if (!SvOK (length) || len + offset > svlen)
		1412	len = svlen - offset;
		1413
		1414	{
		1415	dREQ;
		1416
		1417	req->type = EIO_MLOCK;
		1418	req->sv2 = SvREFCNT_inc (data);
		1419	req->ptr2 = (char *)svptr + offset;
		1420	req->size = len;
		1421
		1422	REQ_SEND;
		1423	}
		1424	}
		1425
		1426	void
		1427	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1428	PPCODE:
		1429	{
		1430	dREQ;
		1431
		1432	req->type = EIO_MLOCKALL;
		1433	req->int1 = flags;
		1434
		1435	REQ_SEND;
		1436	}
		1437
		1438	void
		1439	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1440	PPCODE:
		1441	{
		1442	dREQ;
		1443
		1444	req->type = EIO_BUSY;
		1445	req->nv1 = delay < 0. ? 0. : delay;
		1446
		1447	REQ_SEND;
		1448	}
		1449
		1450	void
		1451	aio_group (SV *callback=&PL_sv_undef)
		1452	PPCODE:
		1453	{
		1454	dREQ;
		1455
		1456	req->type = EIO_GROUP;
		1457
		1458	req_submit (req);
		1459	XPUSHs (req_sv (req, aio_grp_stash));
		1460	}
		1461
		1462	void
		1463	aio_nop (SV *callback=&PL_sv_undef)
		1464	ALIAS:
		1465	aio_nop = EIO_NOP
		1466	aio_sync = EIO_SYNC
		1467	PPCODE:
		1468	{
		1469	dREQ;
		1470
		1471	req->type = ix;
		1472
		1473	REQ_SEND;
		1474	}
		1475
		1476	int
		1477	aioreq_pri (int pri = 0)
		1478	CODE:
		1479	RETVAL = next_pri;
		1480	if (items > 0)
		1481	{
		1482	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1483	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1484	next_pri = pri;
		1485	}
		1486	OUTPUT:
		1487	RETVAL
		1488
		1489	void
		1490	aioreq_nice (int nice = 0)
		1491	CODE:
		1492	nice = next_pri - nice;
		1493	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1494	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1495	next_pri = nice;
1030		1496
1031	void	1497	void
1032	flush ()	1498	flush ()
1033	PROTOTYPE:
1034	CODE:	1499	CODE:
1035	while (nreqs)	1500	while (eio_nreqs ())
1036	{	1501	{
1037	poll_wait ();	1502	poll_wait ();
1038	poll_cb ();	1503	poll_cb ();
1039	}	1504	}
1040		1505
1041	void
1042	poll()
1043	PROTOTYPE:
1044	CODE:
1045	if (nreqs)
1046	{
1047	poll_wait ();
1048	poll_cb ();
1049	}
1050
1051	int	1506	int
1052	poll_fileno()	1507	poll ()
1053	PROTOTYPE:
1054	CODE:	1508	CODE:
1055	RETVAL = respipe [0];	1509	poll_wait ();
1056	OUTPUT:
1057	RETVAL
1058
1059	int
1060	poll_cb(...)
1061	PROTOTYPE:
1062	CODE:
1063	RETVAL = poll_cb ();	1510	RETVAL = poll_cb ();
1064	OUTPUT:	1511	OUTPUT:
1065	RETVAL	1512	RETVAL
1066		1513
1067	void
1068	poll_wait()
1069	PROTOTYPE:
1070	CODE:
1071	if (nreqs)
1072	poll_wait ();
1073
1074	int	1514	int
1075	nreqs()	1515	poll_fileno ()
1076	PROTOTYPE:
1077	CODE:	1516	CODE:
1078	RETVAL = nreqs;	1517	RETVAL = s_epipe_fd (&respipe);
1079	OUTPUT:	1518	OUTPUT:
1080	RETVAL	1519	RETVAL
1081		1520
		1521	int
		1522	poll_cb (...)
		1523	PROTOTYPE:
		1524	CODE:
		1525	RETVAL = poll_cb ();
		1526	OUTPUT:
		1527	RETVAL
		1528
		1529	void
		1530	poll_wait ()
		1531	CODE:
		1532	poll_wait ();
		1533
		1534	int
		1535	nreqs ()
		1536	CODE:
		1537	RETVAL = eio_nreqs ();
		1538	OUTPUT:
		1539	RETVAL
		1540
		1541	int
		1542	nready ()
		1543	CODE:
		1544	RETVAL = eio_nready ();
		1545	OUTPUT:
		1546	RETVAL
		1547
		1548	int
		1549	npending ()
		1550	CODE:
		1551	RETVAL = eio_npending ();
		1552	OUTPUT:
		1553	RETVAL
		1554
		1555	int
		1556	nthreads ()
		1557	CODE:
		1558	RETVAL = eio_nthreads ();
		1559	OUTPUT:
		1560	RETVAL
		1561
		1562	int
		1563	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1564	CODE:
		1565	RETVAL = posix_fadvise (fh, offset, length, advice);
		1566	OUTPUT:
		1567	RETVAL
		1568
		1569	ssize_t
		1570	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1571	CODE:
		1572	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1573	OUTPUT:
		1574	RETVAL
		1575
		1576	void
		1577	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1578	PPCODE:
		1579	sv_unmagic (scalar, MMAP_MAGIC);
		1580	{
		1581	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1582	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1583	if (addr == (void *)-1)
		1584	XSRETURN_NO;
		1585
		1586	sv_force_normal (scalar);
		1587
		1588	/* we store the length in mg_obj, as namlen is I32 :/ */
		1589	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1590	->mg_obj = (SV *)length;
		1591
		1592	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1593
		1594	if (!(prot & PROT_WRITE))
		1595	SvREADONLY_on (scalar);
		1596
		1597	if (SvLEN (scalar))
		1598	Safefree (SvPVX (scalar));
		1599
		1600	SvPVX (scalar) = (char *)addr;
		1601	SvCUR_set (scalar, length);
		1602	SvLEN_set (scalar, 0);
		1603	SvPOK_only (scalar);
		1604
		1605	XSRETURN_YES;
		1606	}
		1607
		1608	void
		1609	munmap (SV *scalar)
		1610	CODE:
		1611	sv_unmagic (scalar, MMAP_MAGIC);
		1612
		1613	int
		1614	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1615	ALIAS:
		1616	mprotect = 1
		1617	CODE:
		1618	{
		1619	STRLEN svlen;
		1620	void *addr = SvPVbyte (scalar, svlen);
		1621	size_t len = SvUV (length);
		1622
		1623	if (offset < 0)
		1624	offset += svlen;
		1625
		1626	if (offset < 0 || offset > svlen)
		1627	croak ("offset outside of scalar");
		1628
		1629	if (!SvOK (length) || len + offset > svlen)
		1630	len = svlen - offset;
		1631
		1632	addr = (void *)(((intptr_t)addr) + offset);
		1633	eio_page_align (&addr, &len);
		1634
		1635	switch (ix)
		1636	{
		1637	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1638	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1639	}
		1640	}
		1641	OUTPUT:
		1642	RETVAL
		1643
		1644	int
		1645	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1646	CODE:
		1647	{
		1648	STRLEN svlen;
		1649	void *addr = SvPVbyte (scalar, svlen);
		1650	size_t len = SvUV (length);
		1651
		1652	if (offset < 0)
		1653	offset += svlen;
		1654
		1655	if (offset < 0 || offset > svlen)
		1656	croak ("offset outside of scalar");
		1657
		1658	if (!SvOK (length) || len + offset > svlen)
		1659	len = svlen - offset;
		1660
		1661	addr = (void *)(((intptr_t)addr) + offset);
		1662	eio_page_align (&addr, &len);
		1663	#if _POSIX_MEMLOCK_RANGE
		1664	RETVAL = munlock (addr, len);
		1665	#else
		1666	RETVAL = ((errno = ENOSYS), -1);
		1667	#endif
		1668	}
		1669	OUTPUT:
		1670	RETVAL
		1671
		1672	int
		1673	munlockall ()
		1674	CODE:
		1675	#if _POSIX_MEMLOCK
		1676	munlockall ();
		1677	#else
		1678	RETVAL = -1;
		1679	errno = ENOSYS;
		1680	#endif
		1681	OUTPUT:
		1682	RETVAL
		1683
		1684	void _on_next_submit (SV *cb)
		1685	CODE:
		1686	SvREFCNT_dec (on_next_submit);
		1687	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1688
		1689	PROTOTYPES: DISABLE
		1690
		1691	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1692
		1693	void
		1694	cancel (aio_req_ornot req)
		1695	CODE:
		1696	eio_cancel (req);
		1697
		1698	void
		1699	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1700	PPCODE:
		1701	{
		1702	if (GIMME_V != G_VOID)
		1703	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1704
		1705	if (items > 1)
		1706	{
		1707	SV *cb_cv =get_cb (callback);
		1708
		1709	SvREFCNT_dec (req->callback);
		1710	req->callback = SvREFCNT_inc (cb_cv);
		1711	}
		1712	}
		1713
		1714	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1715
		1716	void
		1717	add (aio_req grp, ...)
		1718	PPCODE:
		1719	{
		1720	int i;
		1721
		1722	if (grp->int1 == 2)
		1723	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1724
		1725	for (i = 1; i < items; ++i )
		1726	{
		1727	aio_req req;
		1728
		1729	if (GIMME_V != G_VOID)
		1730	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1731
		1732	req = SvAIO_REQ (ST (i));
		1733
		1734	if (req)
		1735	eio_grp_add (grp, req);
		1736	}
		1737	}
		1738
		1739	void
		1740	cancel_subs (aio_req_ornot req)
		1741	CODE:
		1742	req_cancel_subs (req);
		1743
		1744	void
		1745	result (aio_req grp, ...)
		1746	CODE:
		1747	{
		1748	int i;
		1749	AV *av;
		1750
		1751	grp->errorno = errno;
		1752
		1753	av = newAV ();
		1754	av_extend (av, items - 1);
		1755
		1756	for (i = 1; i < items; ++i )
		1757	av_push (av, newSVsv (ST (i)));
		1758
		1759	SvREFCNT_dec (grp->sv1);
		1760	grp->sv1 = (SV *)av;
		1761	}
		1762
		1763	void
		1764	errno (aio_req grp, int errorno = errno)
		1765	CODE:
		1766	grp->errorno = errorno;
		1767
		1768	void
		1769	limit (aio_req grp, int limit)
		1770	CODE:
		1771	eio_grp_limit (grp, limit);
		1772
		1773	void
		1774	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1775	CODE:
		1776	{
		1777	SvREFCNT_dec (grp->sv2);
		1778	grp->sv2 = newSVsv (callback);
		1779	grp->feed = aio_grp_feed;
		1780
		1781	if (grp->int2 <= 0)
		1782	grp->int2 = 2;
		1783
		1784	eio_grp_limit (grp, grp->int2);
		1785	}
		1786

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