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

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