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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.158 by root, Sat Jan 2 14:11:32 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12
13	#include <unistd.h>	16	#include <limits.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	18	#include <sched.h>
17		19
18	#include <pthread.h>	20	/* perl namespace pollution */
		21	#undef VERSION
19		22
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	23	#ifdef _WIN32
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		24
24	#if __ia64	25	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	26	# undef malloc
		27	# undef free
		28
		29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
26	#else	61	#else
27	# define STACKSIZE 4096	62
		63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
28	#endif	70	#endif
29		71
		72	/* perl stupidly overrides readdir and maybe others */
		73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
		89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
30	enum {	150	enum {
31	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	152	};
39		153
40	typedef struct aio_cb {	154	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		155
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
		157	typedef eio_req *aio_req_ornot;
59		158
60	static int started;	159	static SV *on_next_submit;
61	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	161	static int max_outstanding;
63	static int respipe [2];
64		162
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		164
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	166	static void req_cancel (aio_req req);
72		167
73	static void	168	static void want_poll (void)
74	poll_wait ()
75	{	169	{
76	if (nreqs && !ress)	170	/* write a dummy byte to the pipe so fh becomes ready */
		171	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
		179
		180	/* must be called at most once */
		181	static SV *req_sv (aio_req req, HV *stash)
		182	{
		183	if (!req->self)
77	{	184	{
78	fd_set rfd;	185	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	187	}
84	}
85		188
86	static int	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
87	poll_cb ()	190	}
		191
		192	static aio_req SvAIO_REQ (SV *sv)
		193	{
		194	MAGIC *mg;
		195
		196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		200	croak ("object of class IO::AIO::REQ expected");
		201
		202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		203
		204	return mg ? (aio_req)mg->mg_ptr : 0;
		205	}
		206
		207	static void aio_grp_feed (aio_req grp)
		208	{
		209	if (grp->sv2 && SvOK (grp->sv2))
		210	{
		211	dSP;
		212
		213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, aio_grp_stash));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
		222	}
		223	}
		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
		242	static int req_invoke (eio_req *req)
88	{	243	{
89	dSP;	244	dSP;
90	int count = 0;
91	int do_croak = 0;
92	aio_req req, prv;
93		245
94	pthread_mutex_lock (&reslock);	246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
95		248
96	{	249	if (!EIO_CANCELLED (req) && req->callback)
97	/* read any signals sent by the worker threads */
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{	250	{
110	nreqs--;	251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
111		255
112	if (req->type == REQ_QUIT)	256	switch (req->type)
113	started--;
114	else
115	{	257	{
116	int errorno = errno;	258	case EIO_READDIR:
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	259	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	260	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		261
135	Safefree (req->statdata);	262	if (req->result >= 0)
		263	{
		264	int i;
		265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		267	AV *av = newAV ();
		268
		269	av_extend (av, req->result - 1);
		270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
		305	names += SvCUR (name) + 1;
		306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
		310	}
		311
		312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
136	}	316	}
		317	break;
137		318
138	ENTER;	319	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	320	{
144	/* convert fd to fh */	321	/* convert fd to fh */
145	SV *fh;	322	SV *fh = &PL_sv_undef;
146		323
147	PUTBACK;	324	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	325	{
149	SPAGAIN;	326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, aio_stash, sym, symlen, 0);
150		333
151	fh = SvREFCNT_inc (POPs);	334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
152		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
153	PUSHMARK (SP);	346	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	347	}
		348	break;
156		349
157	if (SvOK (req->callback))	350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
158	{	383	{
159	PUTBACK;	384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
160	call_sv (req->callback, G_VOID | G_EVAL);	385	*SvEND (req->sv2) = 0;
161	SPAGAIN;	386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
162	}	389	}
163
164	do_croak = SvTRUE (ERRSV);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}
174
175	prv = req;
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);
181	}
182
183	return count;
184	}
185
186	static void *aio_proc(void *arg);
187
188	static void
189	start_thread (void)
190	{
191	sigset_t fullsigset, oldsigset;
192	pthread_t tid;
193	pthread_attr_t attr;
194
195	pthread_attr_init (&attr);
196	pthread_attr_setstacksize (&attr, STACKSIZE);
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199	sigfillset (&fullsigset);
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	pthread_mutex_lock (&frklock);
273
274	fork_started = started;
275
276	for (;;) {
277	while (nreqs)
278	{
279	poll_wait ();
280	poll_cb ();
281	}
282
283	max_parallel (0);
284
285	pthread_mutex_lock (&reqlock);
286
287	if (!nreqs && !started)
288	break;
289
290	pthread_mutex_unlock (&reqlock);
291
292	min_parallel (fork_started);
293	}
294
295	pthread_mutex_lock (&reslock);
296
297	assert (!started);
298	assert (!nreqs);
299	assert (!reqs && !reqe);
300	assert (!ress && !rese);
301	}
302
303	static void atfork_parent (void)
304	{
305	pthread_mutex_unlock (&reslock);
306	min_parallel (fork_started);
307	pthread_mutex_unlock (&reqlock);
308	pthread_mutex_unlock (&frklock);
309	}
310
311	static void atfork_child (void)
312	{
313	reqs = reqe = 0;
314
315	atfork_parent ();
316	}
317
318	/*****************************************************************************/
319	/* work around various missing functions */
320
321	#if !HAVE_PREADWRITE
322	# define pread aio_pread
323	# define pwrite aio_pwrite
324
325	/*
326	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.
329	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
331
332	static ssize_t
333	pread (int fd, void *buf, size_t count, off_t offset)
334	{
335	ssize_t res;
336	off_t ooffset;
337
338	pthread_mutex_lock (&iolock);
339	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);
344
345	return res;
346	}
347
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)
350	{
351	ssize_t res;
352	off_t ooffset;
353
354	pthread_mutex_lock (&iolock);
355	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);
360
361	return res;
362	}
363	#endif
364
365	#if !HAVE_FDATASYNC
366	# define fdatasync fsync
367	#endif
368
369	#if !HAVE_READAHEAD
370	# define readahead aio_readahead
371
372	static char readahead_buf[4096];
373
374	static ssize_t
375	readahead (int fd, off_t offset, size_t count)
376	{
377	while (count > 0)
378	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380
381	pread (fd, readahead_buf, len, offset);
382	offset += len;
383	count -= len;
384	}
385
386	errno = 0;
387	}
388	#endif
389
390	/*****************************************************************************/
391
392	static void *
393	aio_proc (void *thr_arg)
394	{
395	aio_req req;
396	int type;
397
398	do
399	{
400	pthread_mutex_lock (&reqlock);
401
402	for (;;)
403	{
404	req = reqs;
405
406	if (reqs)
407	{
408	reqs = reqs->next;
409	if (!reqs) reqe = 0;
410	}
411
412	if (req)
413	break;	390	break;
414		391
415	pthread_cond_wait (&reqwait, &reqlock);
416	}
417
418	pthread_mutex_unlock (&reqlock);
419
420	errno = 0; /* strictly unnecessary */
421
422	type = req->type;
423
424	switch (type)
425	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
430
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;
443
444	case REQ_QUIT:	392	case EIO_DUP2:
445	break;	393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
446		396
447	default:	397	default:
448	req->result = ENOSYS;	398	PUSHs (sv_2mortal (newSViv (req->result)));
449	break;	399	break;
450	}	400	}
451		401
452	req->errorno = errno;	402	errno = req->errorno;
453		403
454	pthread_mutex_lock (&reslock);	404	PUTBACK;
		405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		406	SPAGAIN;
455		407
456	req->next = 0;	408	FREETMPS;
		409	LEAVE;
457		410
458	if (rese)	411	PUTBACK;
459	{
460	rese->next = req;
461	rese = req;
462	}
463	else
464	{
465	rese = ress = req;
466
467	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);
469	}
470
471	pthread_mutex_unlock (&reslock);
472	}	412	}
473	while (type != REQ_QUIT);
474		413
		414	return !!SvTRUE (ERRSV);
		415	}
		416
		417	static void req_destroy (aio_req req)
		418	{
		419	if (req->self)
		420	{
		421	sv_unmagic (req->self, PERL_MAGIC_ext);
		422	SvREFCNT_dec (req->self);
		423	}
		424
		425	SvREFCNT_dec (req->sv1);
		426	SvREFCNT_dec (req->sv2);
		427	SvREFCNT_dec (req->callback);
		428
		429	Safefree (req);
		430	}
		431
		432	static void req_cancel_subs (aio_req grp)
		433	{
		434	aio_req sub;
		435
		436	if (grp->type != EIO_GROUP)
475	return 0;	437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
		443	}
		444
		445	static void
		446	create_respipe (void)
		447	{
		448	if (s_epipe_renew (&respipe))
		449	croak ("IO::AIO: unable to initialize result pipe");
		450	}
		451
		452	static void poll_wait (void)
		453	{
		454	while (eio_nreqs ())
		455	{
		456	int size;
		457
		458	X_LOCK (reslock);
		459	size = res_queue.size;
		460	X_UNLOCK (reslock);
		461
		462	if (size)
		463	return;
		464
		465	etp_maybe_start_thread ();
		466
		467	s_epipe_wait (&respipe);
		468	}
		469	}
		470
		471	static int poll_cb (void)
		472	{
		473	for (;;)
		474	{
		475	int res = eio_poll ();
		476
		477	if (res > 0)
		478	croak (0);
		479
		480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
		482
		483	poll_wait ();
		484	}
		485	}
		486
		487	static void atfork_child (void)
		488	{
		489	create_respipe ();
		490	}
		491
		492	static SV *
		493	get_cb (SV *cb_sv)
		494	{
		495	SvGETMAGIC (cb_sv);
		496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
476	}	497	}
477		498
478	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
479	aio_req req; \	501	aio_req req; \
		502	int req_pri = next_pri; \
		503	next_pri = EIO_PRI_DEFAULT; \
480	\	504	\
481	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
482	croak ("clalback must be undef or of reference type"); \
483	\	506	\
484	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
485	if (!req) \	508	if (!req) \
486	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
487	\	510	\
488	req->callback = SvREFCNT_inc (callback);	511	req->callback = SvREFCNT_inc (cb_cv); \
489		512	req->pri = req_pri
		513
		514	#define REQ_SEND \
		515	PUTBACK; \
		516	req_submit (req); \
		517	SPAGAIN; \
		518	\
		519	if (GIMME_V != G_VOID) \
		520	XPUSHs (req_sv (req, aio_req_stash));
		521
490	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
491		523
492	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
493		525
494	BOOT:	526	BOOT:
495	{	527	{
496	if (pipe (respipe))	528	static const struct {
497	croak ("unable to initialize result pipe");	529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
		542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
498		549
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	550	const_eio (MS_ASYNC)
500	croak ("cannot set result pipe to nonblocking mode");	551	const_eio (MS_INVALIDATE)
		552	const_eio (MS_SYNC)
501		553
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	554	const_eio (MT_MODIFY)
503	croak ("cannot set result pipe to nonblocking mode");
504		555
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	556	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
506	}	557	const_eio (SYNC_FILE_RANGE_WRITE)
		558	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
507		559
		560	const_eio (READDIR_DENTS)
		561	const_eio (READDIR_DIRS_FIRST)
		562	const_eio (READDIR_STAT_ORDER)
		563	const_eio (READDIR_FOUND_UNKNOWN)
		564
		565	const_eio (DT_UNKNOWN)
		566	const_eio (DT_FIFO)
		567	const_eio (DT_CHR)
		568	const_eio (DT_DIR)
		569	const_eio (DT_BLK)
		570	const_eio (DT_REG)
		571	const_eio (DT_LNK)
		572	const_eio (DT_SOCK)
		573	const_eio (DT_WHT)
		574	};
		575
		576	aio_stash = gv_stashpv ("IO::AIO" , 1);
		577	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		578	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		579
		580	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		581	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		582
		583	create_respipe ();
		584
		585	if (eio_init (want_poll, done_poll) < 0)
		586	croak ("IO::AIO: unable to initialise eio library");
		587
		588	/* atfork child called in fifo order, so before eio's handler */
		589	X_THREAD_ATFORK (0, 0, atfork_child);
		590	}
		591
508	void	592	void
509	min_parallel(nthreads)	593	max_poll_reqs (int nreqs)
510	int nthreads
511	PROTOTYPE: $	594	PROTOTYPE: $
		595	CODE:
		596	eio_set_max_poll_reqs (nreqs);
512		597
513	void	598	void
514	max_parallel(nthreads)	599	max_poll_time (double nseconds)
515	int nthreads
516	PROTOTYPE: $	600	PROTOTYPE: $
517
518	int
519	max_outstanding(nreqs)
520	int nreqs
521	PROTOTYPE: $
522	CODE:	601	CODE:
523	RETVAL = max_outstanding;	602	eio_set_max_poll_time (nseconds);
		603
		604	void
		605	min_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_min_parallel (nthreads);
		609
		610	void
		611	max_parallel (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_parallel (nthreads);
		615
		616	void
		617	max_idle (int nthreads)
		618	PROTOTYPE: $
		619	CODE:
		620	eio_set_max_idle (nthreads);
		621
		622	void
		623	max_outstanding (int maxreqs)
		624	PROTOTYPE: $
		625	CODE:
524	max_outstanding = nreqs;	626	max_outstanding = maxreqs;
525		627
526	void	628	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	629	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
528	SV * pathname
529	int flags
530	int mode
531	SV * callback
532	PROTOTYPE: $$$;$	630	PROTOTYPE: $$$;$
533	CODE:	631	PPCODE:
534	{	632	{
535	dREQ;	633	dREQ;
536		634
537	req->type = REQ_OPEN;	635	req->type = EIO_OPEN;
538	req->data = newSVsv (pathname);	636	req->sv1 = newSVsv (pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);	637	req->ptr1 = SvPVbyte_nolen (req->sv1);
540	req->fd = flags;	638	req->int1 = flags;
541	req->mode = mode;	639	req->int2 = mode;
542		640
543	send_req (req);	641	REQ_SEND;
544	}	642	}
545		643
546	void	644	void
547	aio_close(fh,callback=&PL_sv_undef)	645	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
548	SV * fh
549	SV * callback
550	PROTOTYPE: $;$	646	PROTOTYPE: $;$
551	ALIAS:	647	ALIAS:
552	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	648	aio_fsync = EIO_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	649	aio_fdatasync = EIO_FDATASYNC
555	CODE:	650	PPCODE:
556	{	651	{
		652	int fd = s_fileno_croak (fh, 0);
557	dREQ;	653	dREQ;
558		654
559	req->type = ix;	655	req->type = ix;
560	req->fh = newSVsv (fh);	656	req->sv1 = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	657	req->int1 = fd;
562		658
563	send_req (req);	659	REQ_SEND (req);
564	}	660	}
565		661
566	void	662	void
		663	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		664	PROTOTYPE: $$$$;$
		665	PPCODE:
		666	{
		667	int fd = s_fileno_croak (fh, 0);
		668	dREQ;
		669
		670	req->type = EIO_SYNC_FILE_RANGE;
		671	req->sv1 = newSVsv (fh);
		672	req->int1 = fd;
		673	req->offs = offset;
		674	req->size = nbytes;
		675	req->int2 = flags;
		676
		677	REQ_SEND (req);
		678	}
		679
		680	void
		681	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		682	PROTOTYPE: $;$
		683	PPCODE:
		684	{
		685	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		686	int fd = s_fileno_croak (fh, 0);
		687	dREQ;
		688
		689	if (close_pipe < 0)
		690	{
		691	int pipefd [2];
		692
		693	if (pipe (pipefd) < 0
		694	|| close (pipefd [1]) < 0
		695	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		696	abort (); /*D*/
		697
		698	close_pipe = pipefd [0];
		699	}
		700
		701	req->type = EIO_DUP2;
		702	req->int1 = close_pipe;
		703	req->sv2 = newSVsv (fh);
		704	req->int2 = fd;
		705
		706	REQ_SEND (req);
		707	}
		708
		709	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	710	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
568	SV * fh
569	UV offset
570	IV length
571	SV * data
572	IV dataoffset
573	SV * callback
574	ALIAS:	711	ALIAS:
575	aio_read = REQ_READ	712	aio_read = EIO_READ
576	aio_write = REQ_WRITE	713	aio_write = EIO_WRITE
577	PROTOTYPE: $$$$$;$	714	PROTOTYPE: $$$$$;$
578	CODE:	715	PPCODE:
579	{	716	{
580	aio_req req;
581	STRLEN svlen;	717	STRLEN svlen;
		718	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
582	char *svptr = SvPVbyte (data, svlen);	719	char *svptr = SvPVbyte (data, svlen);
583		720	UV len = SvUV (length);
584	SvUPGRADE (data, SVt_PV);
585	SvPOK_on (data);
586		721
587	if (dataoffset < 0)	722	if (dataoffset < 0)
588	dataoffset += svlen;	723	dataoffset += svlen;
589		724
590	if (dataoffset < 0 || dataoffset > svlen)	725	if (dataoffset < 0 || dataoffset > svlen)
591	croak ("data offset outside of string");	726	croak ("dataoffset outside of data scalar");
592		727
593	if (ix == REQ_WRITE)	728	if (ix == EIO_WRITE)
594	{	729	{
595	/* write: check length and adjust. */	730	/* write: check length and adjust. */
596	if (length < 0 || length + dataoffset > svlen)	731	if (!SvOK (length) || len + dataoffset > svlen)
597	length = svlen - dataoffset;	732	len = svlen - dataoffset;
598	}	733	}
599	else	734	else
600	{	735	{
601	/* read: grow scalar as necessary */	736	/* read: check type and grow scalar as necessary */
		737	SvUPGRADE (data, SVt_PV);
602	svptr = SvGROW (data, length + dataoffset);	738	svptr = SvGROW (data, len + dataoffset + 1);
603	}	739	}
604
605	if (length < 0)
606	croak ("length must not be negative");
607		740
608	{	741	{
609	dREQ;	742	dREQ;
610		743
611	req->type = ix;	744	req->type = ix;
612	req->fh = newSVsv (fh);	745	req->sv1 = newSVsv (fh);
613	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	746	req->int1 = fd;
614	: IoOFP (sv_2io (fh)));	747	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
615	req->offset = offset;	748	req->size = len;
616	req->length = length;
617	req->data = SvREFCNT_inc (data);	749	req->sv2 = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	750	req->ptr2 = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);	751	req->stroffset = dataoffset;
620		752
621	send_req (req);	753	if (!SvREADONLY (data))
		754	{
		755	SvREADONLY_on (data);
		756	req->flags |= FLAG_SV2_RO_OFF;
		757	}
		758
		759	REQ_SEND;
622	}	760	}
623	}	761	}
624		762
625	void	763	void
		764	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		765	PROTOTYPE: $$;$
		766	PPCODE:
		767	{
		768	SV *data;
		769	dREQ;
		770
		771	req->type = EIO_READLINK;
		772	req->sv1 = newSVsv (path);
		773	req->ptr1 = SvPVbyte_nolen (req->sv1);
		774
		775	REQ_SEND;
		776	}
		777
		778	void
		779	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		780	PROTOTYPE: $$$$;$
		781	PPCODE:
		782	{
		783	int ifd = s_fileno_croak (in_fh , 0);
		784	int ofd = s_fileno_croak (out_fh, 1);
		785	dREQ;
		786
		787	req->type = EIO_SENDFILE;
		788	req->sv1 = newSVsv (out_fh);
		789	req->int1 = ofd;
		790	req->sv2 = newSVsv (in_fh);
		791	req->int2 = ifd;
		792	req->offs = in_offset;
		793	req->size = length;
		794
		795	REQ_SEND;
		796	}
		797
		798	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	799	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
627	SV * fh
628	UV offset
629	IV length
630	SV * callback
631	PROTOTYPE: $$$;$	800	PROTOTYPE: $$$;$
632	CODE:	801	PPCODE:
633	{	802	{
		803	int fd = s_fileno_croak (fh, 0);
634	dREQ;	804	dREQ;
635		805
636	req->type = REQ_READAHEAD;	806	req->type = EIO_READAHEAD;
637	req->fh = newSVsv (fh);	807	req->sv1 = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	808	req->int1 = fd;
639	req->offset = offset;	809	req->offs = offset;
640	req->length = length;	810	req->size = length;
641		811
642	send_req (req);	812	REQ_SEND;
643	}	813	}
644		814
645	void	815	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)	816	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
647	SV * fh_or_path
648	SV * callback
649	ALIAS:	817	ALIAS:
650	aio_stat = REQ_STAT	818	aio_stat = EIO_STAT
651	aio_lstat = REQ_LSTAT	819	aio_lstat = EIO_LSTAT
652	CODE:	820	PPCODE:
653	{	821	{
654	dREQ;	822	dREQ;
655		823
656	New (0, req->statdata, 1, Stat_t);	824	req->sv1 = newSVsv (fh_or_path);
657	if (!req->statdata)
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
659		825
660	if (SvPOK (fh_or_path))	826	if (SvPOK (req->sv1))
661	{	827	{
662	req->type = ix;	828	req->type = ix;
663	req->data = newSVsv (fh_or_path);
664	req->dataptr = SvPVbyte_nolen (req->data);	829	req->ptr1 = SvPVbyte_nolen (req->sv1);
665	}	830	}
666	else	831	else
667	{	832	{
668	req->type = REQ_FSTAT;	833	req->type = EIO_FSTAT;
669	req->fh = newSVsv (fh_or_path);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	834	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		835	}
		836
		837	REQ_SEND;
		838	}
		839
		840	void
		841	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		842	PPCODE:
		843	{
		844	dREQ;
		845
		846	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		847	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
671	}	851	{
		852	req->type = EIO_UTIME;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FUTIME;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
672		860
673	send_req (req);	861	REQ_SEND;
674	}	862	}
675		863
676	void	864	void
		865	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->sv1 = newSVsv (fh_or_path);
		871	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		872
		873	if (SvPOK (req->sv1))
		874	{
		875	req->type = EIO_TRUNCATE;
		876	req->ptr1 = SvPVbyte_nolen (req->sv1);
		877	}
		878	else
		879	{
		880	req->type = EIO_FTRUNCATE;
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	}
		883
		884	REQ_SEND;
		885	}
		886
		887	void
		888	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		889	ALIAS:
		890	aio_chmod = EIO_CHMOD
		891	aio_mkdir = EIO_MKDIR
		892	PPCODE:
		893	{
		894	dREQ;
		895
		896	req->int2 = mode;
		897	req->sv1 = newSVsv (fh_or_path);
		898
		899	if (SvPOK (req->sv1))
		900	{
		901	req->type = ix;
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	}
		904	else
		905	{
		906	req->type = EIO_FCHMOD;
		907	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		908	}
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		915	PPCODE:
		916	{
		917	dREQ;
		918
		919	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		920	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		921	req->sv1 = newSVsv (fh_or_path);
		922
		923	if (SvPOK (req->sv1))
		924	{
		925	req->type = EIO_CHOWN;
		926	req->ptr1 = SvPVbyte_nolen (req->sv1);
		927	}
		928	else
		929	{
		930	req->type = EIO_FCHOWN;
		931	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		932	}
		933
		934	REQ_SEND;
		935	}
		936
		937	void
		938	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = EIO_READDIR;
		944	req->sv1 = newSVsv (pathname);
		945	req->ptr1 = SvPVbyte_nolen (req->sv1);
		946	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		947
		948	if (flags & EIO_READDIR_DENTS)
		949	req->int1 |= EIO_READDIR_CUSTOM2;
		950
		951	REQ_SEND;
		952	}
		953
		954	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	955	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
678	SV * pathname
679	SV * callback
680	ALIAS:	956	ALIAS:
681	aio_unlink = REQ_UNLINK	957	aio_unlink = EIO_UNLINK
682	aio_rmdir = REQ_RMDIR	958	aio_rmdir = EIO_RMDIR
		959	aio_readdir = EIO_READDIR
683	CODE:	960	PPCODE:
684	{	961	{
685	dREQ;	962	dREQ;
686		963
687	req->type = ix;	964	req->type = ix;
688	req->data = newSVsv (pathname);	965	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	966	req->ptr1 = SvPVbyte_nolen (req->sv1);
		967
		968	REQ_SEND;
		969	}
		970
		971	void
		972	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		973	ALIAS:
		974	aio_link = EIO_LINK
		975	aio_symlink = EIO_SYMLINK
		976	aio_rename = EIO_RENAME
		977	PPCODE:
		978	{
		979	dREQ;
690		980
691	send_req (req);	981	req->type = ix;
692	}	982	req->sv1 = newSVsv (oldpath);
693		983	req->ptr1 = SvPVbyte_nolen (req->sv1);
694	void	984	req->sv2 = newSVsv (newpath);
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	985	req->ptr2 = SvPVbyte_nolen (req->sv2);
696	SV * oldpath
697	SV * newpath
698	SV * callback
699	CODE:
700	{
701	dREQ;
702		986
703	req->type = REQ_SYMLINK;	987	REQ_SEND;
704	req->fh = newSVsv (oldpath);	988	}
705	req->data2ptr = SvPVbyte_nolen (req->fh);	989
706	req->data = newSVsv (newpath);	990	void
707	req->dataptr = SvPVbyte_nolen (req->data);	991	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		992	PPCODE:
		993	{
		994	dREQ;
708		995
709	send_req (req);	996	req->type = EIO_MKNOD;
		997	req->sv1 = newSVsv (pathname);
		998	req->ptr1 = SvPVbyte_nolen (req->sv1);
		999	req->int2 = (mode_t)mode;
		1000	req->offs = dev;
		1001
		1002	REQ_SEND;
710	}	1003	}
711		1004
712	void	1005	void
		1006	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1007	ALIAS:
		1008	aio_mtouch = EIO_MTOUCH
		1009	aio_msync = EIO_MSYNC
		1010	PROTOTYPE: $$$$;$
		1011	PPCODE:
		1012	{
		1013	STRLEN svlen;
		1014	UV len = SvUV (length);
		1015	char *svptr = SvPVbyte (data, svlen);
		1016
		1017	if (offset < 0)
		1018	offset += svlen;
		1019
		1020	if (offset < 0 || offset > svlen)
		1021	croak ("offset outside of scalar");
		1022
		1023	if (!SvOK (length) || len + offset > svlen)
		1024	len = svlen - offset;
		1025
		1026	{
		1027	dREQ;
		1028
		1029	req->type = ix;
		1030	req->size = len;
		1031	req->sv2 = SvREFCNT_inc (data);
		1032	req->ptr2 = (char *)svptr + offset;
		1033	req->int1 = flags;
		1034
		1035	REQ_SEND;
		1036	}
		1037	}
		1038
		1039	void
		1040	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1041	PPCODE:
		1042	{
		1043	dREQ;
		1044
		1045	req->type = EIO_BUSY;
		1046	req->nv1 = delay < 0. ? 0. : delay;
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_group (SV *callback=&PL_sv_undef)
		1053	PROTOTYPE: ;$
		1054	PPCODE:
		1055	{
		1056	dREQ;
		1057
		1058	req->type = EIO_GROUP;
		1059
		1060	req_submit (req);
		1061	XPUSHs (req_sv (req, aio_grp_stash));
		1062	}
		1063
		1064	void
		1065	aio_nop (SV *callback=&PL_sv_undef)
		1066	ALIAS:
		1067	aio_nop = EIO_NOP
		1068	aio_sync = EIO_SYNC
		1069	PPCODE:
		1070	{
		1071	dREQ;
		1072
		1073	req->type = ix;
		1074
		1075	REQ_SEND;
		1076	}
		1077
		1078	int
		1079	aioreq_pri (int pri = 0)
		1080	PROTOTYPE: ;$
		1081	CODE:
		1082	RETVAL = next_pri;
		1083	if (items > 0)
		1084	{
		1085	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1086	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1087	next_pri = pri;
		1088	}
		1089	OUTPUT:
		1090	RETVAL
		1091
		1092	void
		1093	aioreq_nice (int nice = 0)
		1094	CODE:
		1095	nice = next_pri - nice;
		1096	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1097	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1098	next_pri = nice;
		1099
		1100	void
713	flush()	1101	flush ()
714	PROTOTYPE:	1102	PROTOTYPE:
715	CODE:	1103	CODE:
716	while (nreqs)	1104	while (eio_nreqs ())
717	{	1105	{
718	poll_wait ();	1106	poll_wait ();
719	poll_cb ();	1107	poll_cb ();
720	}	1108	}
721		1109
722	void	1110	int
723	poll()	1111	poll()
724	PROTOTYPE:	1112	PROTOTYPE:
725	CODE:	1113	CODE:
726	if (nreqs)
727	{
728	poll_wait ();	1114	poll_wait ();
729	poll_cb ();	1115	RETVAL = poll_cb ();
730	}	1116	OUTPUT:
		1117	RETVAL
731		1118
732	int	1119	int
733	poll_fileno()	1120	poll_fileno()
734	PROTOTYPE:	1121	PROTOTYPE:
735	CODE:	1122	CODE:
736	RETVAL = respipe [0];	1123	RETVAL = s_epipe_fd (&respipe);
737	OUTPUT:	1124	OUTPUT:
738	RETVAL	1125	RETVAL
739		1126
740	int	1127	int
741	poll_cb(...)	1128	poll_cb(...)
…		…
747		1134
748	void	1135	void
749	poll_wait()	1136	poll_wait()
750	PROTOTYPE:	1137	PROTOTYPE:
751	CODE:	1138	CODE:
752	if (nreqs)
753	poll_wait ();	1139	poll_wait ();
754		1140
755	int	1141	int
756	nreqs()	1142	nreqs()
757	PROTOTYPE:	1143	PROTOTYPE:
758	CODE:	1144	CODE:
759	RETVAL = nreqs;	1145	RETVAL = eio_nreqs ();
760	OUTPUT:	1146	OUTPUT:
761	RETVAL	1147	RETVAL
762		1148
		1149	int
		1150	nready()
		1151	PROTOTYPE:
		1152	CODE:
		1153	RETVAL = eio_nready ();
		1154	OUTPUT:
		1155	RETVAL
		1156
		1157	int
		1158	npending()
		1159	PROTOTYPE:
		1160	CODE:
		1161	RETVAL = eio_npending ();
		1162	OUTPUT:
		1163	RETVAL
		1164
		1165	int
		1166	nthreads()
		1167	PROTOTYPE:
		1168	CODE:
		1169	RETVAL = eio_nthreads ();
		1170	OUTPUT:
		1171	RETVAL
		1172
		1173	int
		1174	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1175	PROTOTYPE: $$$$
		1176	CODE:
		1177	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1178	RETVAL = posix_fadvise (fh, offset, length, advice);
		1179	#else
		1180	RETVAL = errno = ENOSYS;
		1181	#endif
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	ssize_t
		1186	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1187	PROTOTYPE: $$$$
		1188	CODE:
		1189	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1190	OUTPUT:
		1191	RETVAL
		1192
		1193	void _on_next_submit (SV *cb)
		1194	CODE:
		1195	SvREFCNT_dec (on_next_submit);
		1196	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1197
		1198	PROTOTYPES: DISABLE
		1199
		1200	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1201
		1202	void
		1203	cancel (aio_req_ornot req)
		1204	CODE:
		1205	eio_cancel (req);
		1206
		1207	void
		1208	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1209	PPCODE:
		1210	{
		1211	if (GIMME_V != G_VOID)
		1212	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1213
		1214	if (items > 1)
		1215	{
		1216	SV *cb_cv =get_cb (callback);
		1217
		1218	SvREFCNT_dec (req->callback);
		1219	req->callback = SvREFCNT_inc (cb_cv);
		1220	}
		1221	}
		1222
		1223	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1224
		1225	void
		1226	add (aio_req grp, ...)
		1227	PPCODE:
		1228	{
		1229	int i;
		1230
		1231	if (grp->int1 == 2)
		1232	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1233
		1234	for (i = 1; i < items; ++i )
		1235	{
		1236	aio_req req;
		1237
		1238	if (GIMME_V != G_VOID)
		1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1240
		1241	req = SvAIO_REQ (ST (i));
		1242
		1243	if (req)
		1244	eio_grp_add (grp, req);
		1245	}
		1246	}
		1247
		1248	void
		1249	cancel_subs (aio_req_ornot req)
		1250	CODE:
		1251	req_cancel_subs (req);
		1252
		1253	void
		1254	result (aio_req grp, ...)
		1255	CODE:
		1256	{
		1257	int i;
		1258	AV *av;
		1259
		1260	grp->errorno = errno;
		1261
		1262	av = newAV ();
		1263	av_extend (av, items - 1);
		1264
		1265	for (i = 1; i < items; ++i )
		1266	av_push (av, newSVsv (ST (i)));
		1267
		1268	SvREFCNT_dec (grp->sv1);
		1269	grp->sv1 = (SV *)av;
		1270	}
		1271
		1272	void
		1273	errno (aio_req grp, int errorno = errno)
		1274	CODE:
		1275	grp->errorno = errorno;
		1276
		1277	void
		1278	limit (aio_req grp, int limit)
		1279	CODE:
		1280	eio_grp_limit (grp, limit);
		1281
		1282	void
		1283	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1284	CODE:
		1285	{
		1286	SvREFCNT_dec (grp->sv2);
		1287	grp->sv2 = newSVsv (callback);
		1288	grp->feed = aio_grp_feed;
		1289
		1290	if (grp->int2 <= 0)
		1291	grp->int2 = 2;
		1292
		1293	eio_grp_limit (grp, grp->int2);
		1294	}
		1295

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