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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC vs.
Revision 1.157 by root, Sat Jan 2 12:58:37 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
26	#include <limits.h>	16	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	17	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	18	#include <sched.h>
31		19
32	#if HAVE_SENDFILE	20	/* perl namespace pollution */
33	# if __linux	21	#undef VERSION
34	# include <sys/sendfile.h>	22
35	# elif __freebsd	23	#ifdef _WIN32
36	# include <sys/socket.h>	24
37	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
38	# elif __hpux	26	# undef malloc
39	# include <sys/socket.h>	27	# undef free
40	# elif __solaris /* not yet */	28
41	# include <sys/sendfile.h>	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
42	# else	61	#else
43	# error sendfile support requested but not available	62
44	# endif	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
45	#endif	70	#endif
46		71
47	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
48	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
49	# define NAME_MAX 4096	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
50	#endif	89	#endif
51		90
52	#ifndef PTHREAD_STACK_MIN	91	/*****************************************************************************/
53	/* care for broken platforms, e.g. windows */	92
54	# define PTHREAD_STACK_MIN 16384	93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
55	#endif	97	#endif
56		98
57	#if __ia64	99	#define expect_false(expr) expect ((expr) != 0, 0)
58	# define STACKSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	101
60	# define STACKSIZE PTHREAD_STACK_MIN	102	/*****************************************************************************/
61	#else	103
62	# define STACKSIZE 16384	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
63	#endif	123	#endif
64		124
65	/* buffer size for various temporary buffers */	125	#ifndef POSIX_FADV_SEQUENTIAL
66	#define AIO_BUFSIZE 65536	126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
67		128
68	#define dBUF \	129	#ifndef POSIX_FADV_RANDOM
69	char *aio_buf; \	130	# define POSIX_FADV_RANDOM 0
70	LOCK (wrklock); \	131	#endif
71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	132
72	UNLOCK (wrklock); \	133	#ifndef POSIX_FADV_NOREUSE
73	if (!aio_buf) \	134	# define POSIX_FADV_NOREUSE 0
74	return -1;	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)
75		149
76	enum {	150	enum {
77	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
78	REQ_OPEN, REQ_CLOSE,
79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
80	REQ_SENDFILE,
81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
82	REQ_FSYNC, REQ_FDATASYNC,
83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
84	REQ_READDIR,
85	REQ_LINK, REQ_SYMLINK,
86	REQ_GROUP, REQ_NOP,
87	REQ_BUSY,
88	};	152	};
89		153
90	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
91	#define AIO_GRP_KLASS "IO::AIO::GRP"
92		155
93	typedef struct aio_cb
94	{
95	struct aio_cb *volatile next;
96
97	SV *data, *callback;
98	SV *fh, *fh2;
99	void *dataptr, *data2ptr;
100	Stat_t *statdata;
101	off_t offset;
102	size_t length;
103	ssize_t result;
104
105	STRLEN dataoffset;
106	int type;
107	int fd, fd2;
108	int errorno;
109	mode_t mode; /* open */
110
111	unsigned char flags;
112	unsigned char pri;
113
114	SV *self; /* the perl counterpart of this request, if any */
115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
116	} aio_cb;
117
118	enum {
119	FLAG_CANCELLED = 0x01,
120	};
121
122	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
123	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
124		158
125	enum {	159	static SV *on_next_submit;
126	PRI_MIN = -4,	160	static int next_pri = EIO_PRI_DEFAULT;
127	PRI_MAX = 4,	161	static int max_outstanding;
128		162
129	DEFAULT_PRI = 0,	163	static s_epipe respipe;
130	PRI_BIAS = -PRI_MIN,
131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
132	};
133		164
134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
135
136	static int started, wanted;
137	static volatile int nreqs;
138	static int respipe [2];
139
140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
142	#else
143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
144	#endif
145
146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
148
149	/* worker threasd management */
150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
151
152	typedef struct worker {
153	/* locked by wrklock */
154	struct worker *prev, *next;
155
156	pthread_t tid;
157
158	/* locked by reslock, reqlock or wrklock */
159	aio_req req; /* currently processed request */
160	void *dbuf;
161	DIR *dirp;
162	} worker;
163
164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
165
166	static void worker_clear (worker *wrk)
167	{
168	if (wrk->dirp)
169	{
170	closedir (wrk->dirp);
171	wrk->dirp = 0;
172	}
173
174	if (wrk->dbuf)
175	{
176	free (wrk->dbuf);
177	wrk->dbuf = 0;
178	}
179	}
180
181	static void worker_free (worker *wrk)
182	{
183	wrk->next->prev = wrk->prev;
184	wrk->prev->next = wrk->next;
185
186	free (wrk);
187	}
188
189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
192
193	/*
194	* a somewhat faster data structure might be nice, but
195	* with 8 priorities this actually needs <20 insns
196	* per shift, the most expensive operation.
197	*/
198	typedef struct {
199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
200	int size;
201	} reqq;
202
203	static reqq req_queue;
204	static reqq res_queue;
205
206	int reqq_push (reqq *q, aio_req req)
207	{
208	int pri = req->pri;
209	req->next = 0;
210
211	if (q->qe[pri])
212	{
213	q->qe[pri]->next = req;
214	q->qe[pri] = req;
215	}
216	else
217	q->qe[pri] = q->qs[pri] = req;
218
219	return q->size++;
220	}
221
222	aio_req reqq_shift (reqq *q)
223	{
224	int pri;
225
226	if (!q->size)
227	return 0;
228
229	--q->size;
230
231	for (pri = NUM_PRI; pri--; )
232	{
233	aio_req req = q->qs[pri];
234
235	if (req)
236	{
237	if (!(q->qs[pri] = req->next))
238	q->qe[pri] = 0;
239
240	return req;
241	}
242	}
243
244	abort ();
245	}
246
247	static int poll_cb ();
248	static void req_invoke (aio_req req);
249	static void req_free (aio_req req);	165	static void req_destroy (aio_req req);
250	static void req_cancel (aio_req req);	166	static void req_cancel (aio_req req);
251		167
		168	static void want_poll (void)
		169	{
		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
252	/* must be called at most once */	180	/* must be called at most once */
253	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
254	{	182	{
255	if (!req->self)	183	if (!req->self)
256	{	184	{
257	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
258	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
259	}	187	}
260		188
261	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
262	}	190	}
263		191
264	static aio_req SvAIO_REQ (SV *sv)	192	static aio_req SvAIO_REQ (SV *sv)
265	{	193	{
266	MAGIC *mg;	194	MAGIC *mg;
267		195
268	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	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")))
269	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class IO::AIO::REQ expected");
270		201
271	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
272		203
273	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
274	}	205	}
275		206
276	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
277	{	208	{
278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	209	if (grp->sv2 && SvOK (grp->sv2))
279	{	210	{
280	int old_len = grp->length;
281
282	if (grp->fh2 && SvOK (grp->fh2))
283	{
284	dSP;	211	dSP;
285		212
286	ENTER;	213	ENTER;
287	SAVETMPS;	214	SAVETMPS;
288	PUSHMARK (SP);	215	PUSHMARK (SP);
289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	XPUSHs (req_sv (grp, aio_grp_stash));
290	PUTBACK;	217	PUTBACK;
291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
292	SPAGAIN;	219	SPAGAIN;
293	FREETMPS;	220	FREETMPS;
294	LEAVE;	221	LEAVE;
295	}
296
297	/* stop if no progress has been made */
298	if (old_len == grp->length)
299	{
300	SvREFCNT_dec (grp->fh2);
301	grp->fh2 = 0;
302	break;
303	}
304	}	222	}
305	}	223	}
306		224
307	static void aio_grp_dec (aio_req grp)	225	static void req_submit (eio_req *req)
308	{	226	{
309	--grp->length;	227	eio_submit (req);
310		228
311	/* call feeder, if applicable */	229	if (expect_false (on_next_submit))
312	aio_grp_feed (grp);
313
314	/* finish, if done */
315	if (!grp->length && grp->fd)
316	{	230	{
317	req_invoke (grp);	231	dSP;
318	req_free (grp);	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);
319	}	239	}
320	}	240	}
321		241
322	static void poll_wait ()	242	static int req_invoke (eio_req *req)
323	{	243	{
324	fd_set rfd;	244	dSP;
325		245
326	while (nreqs)	246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
327	{	250	{
328	int size;
329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
330	LOCK (reslock);
331	#endif
332	size = res_queue.size;
333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
334	UNLOCK (reslock);
335	#endif
336
337	if (size)
338	return;
339
340	FD_ZERO(&rfd);
341	FD_SET(respipe [0], &rfd);
342
343	select (respipe [0] + 1, &rfd, 0, 0, 0);
344	}
345	}
346
347	static void req_invoke (aio_req req)
348	{
349	dSP;
350
351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
352	{
353	errno = req->errorno;
354
355	ENTER;	251	ENTER;
356	SAVETMPS;	252	SAVETMPS;
357	PUSHMARK (SP);	253	PUSHMARK (SP);
358	EXTEND (SP, 1);	254	EXTEND (SP, 1);
359		255
360	switch (req->type)	256	switch (req->type)
361	{	257	{
362	case REQ_READDIR:	258	case EIO_READDIR:
363	{	259	{
364	SV *rv = &PL_sv_undef;	260	SV *rv = &PL_sv_undef;
365		261
366	if (req->result >= 0)	262	if (req->result >= 0)
367	{	263	{
368	int i;	264	int i;
369	char *buf = req->data2ptr;	265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
370	AV *av = newAV ();	267	AV *av = newAV ();
371		268
372	av_extend (av, req->result - 1);	269	av_extend (av, req->result - 1);
373		270
374	for (i = 0; i < req->result; ++i)	271	for (i = 0; i < req->result; ++i)
375	{	272	{
376	SV *sv = newSVpv (buf, 0);	273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
377		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
378	av_store (av, i, sv);	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);
379	buf += SvCUR (sv) + 1;	305	names += SvCUR (name) + 1;
		306	}
380	}	307	}
381		308
382	rv = sv_2mortal (newRV_noinc ((SV *)av));	309	rv = sv_2mortal (newRV_noinc ((SV *)av));
383	}	310	}
384		311
385	PUSHs (rv);	312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
386	}	316	}
387	break;	317	break;
388		318
389	case REQ_OPEN:	319	case EIO_OPEN:
390	{	320	{
391	/* convert fd to fh */	321	/* convert fd to fh */
392	SV *fh;	322	SV *fh = &PL_sv_undef;
393		323
394	PUSHs (sv_2mortal (newSViv (req->result)));	324	if (req->result >= 0)
395	PUTBACK;	325	{
396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	326	GV *gv = (GV *)sv_newmortal ();
397	SPAGAIN;	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);
398		333
399	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	);
400		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
401	PUSHMARK (SP);	346	PUSHs (fh);
402	XPUSHs (sv_2mortal (fh));
403	}	347	}
404	break;	348	break;
405		349
406	case REQ_GROUP:	350	case EIO_GROUP:
407	req->fd = 2; /* mark group as finished */	351	req->int1 = 2; /* mark group as finished */
408		352
409	if (req->data)	353	if (req->sv1)
410	{	354	{
411	int i;	355	int i;
412	AV *av = (AV *)req->data;	356	AV *av = (AV *)req->sv1;
413		357
414	EXTEND (SP, AvFILL (av) + 1);	358	EXTEND (SP, AvFILL (av) + 1);
415	for (i = 0; i <= AvFILL (av); ++i)	359	for (i = 0; i <= AvFILL (av); ++i)
416	PUSHs (*av_fetch (av, i, 0));	360	PUSHs (*av_fetch (av, i, 0));
417	}	361	}
418	break;	362	break;
419		363
420	case REQ_NOP:	364	case EIO_NOP:
421	case REQ_BUSY:	365	case EIO_BUSY:
422	break;	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:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
423		396
424	default:	397	default:
425	PUSHs (sv_2mortal (newSViv (req->result)));	398	PUSHs (sv_2mortal (newSViv (req->result)));
426	break;	399	break;
427	}	400	}
428		401
		402	errno = req->errorno;
429		403
430	PUTBACK;	404	PUTBACK;
431	call_sv (req->callback, G_VOID | G_EVAL);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
432	SPAGAIN;	406	SPAGAIN;
433		407
434	FREETMPS;	408	FREETMPS;
435	LEAVE;	409	LEAVE;
		410
		411	PUTBACK;
436	}	412	}
437		413
438	if (req->grp)	414	return !!SvTRUE (ERRSV);
439	{
440	aio_req grp = req->grp;
441
442	/* unlink request */
443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
445
446	if (grp->grp_first == req)
447	grp->grp_first = req->grp_next;
448
449	aio_grp_dec (grp);
450	}
451
452	if (SvTRUE (ERRSV))
453	{
454	req_free (req);
455	croak (0);
456	}
457	}	415	}
458		416
459	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
460	{	418	{
461	if (req->self)	419	if (req->self)
462	{	420	{
463	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
464	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
465	}	423	}
466		424
467	SvREFCNT_dec (req->data);
468	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
469	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
470	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
471	Safefree (req->statdata);
472
473	if (req->type == REQ_READDIR)
474	free (req->data2ptr);
475		428
476	Safefree (req);	429	Safefree (req);
477	}	430	}
478		431
479	static void req_cancel_subs (aio_req grp)	432	static void req_cancel_subs (aio_req grp)
480	{	433	{
481	aio_req sub;	434	aio_req sub;
482		435
483	if (grp->type != REQ_GROUP)	436	if (grp->type != EIO_GROUP)
484	return;	437	return;
485		438
486	SvREFCNT_dec (grp->fh2);	439	SvREFCNT_dec (grp->sv2);
487	grp->fh2 = 0;	440	grp->sv2 = 0;
488		441
489	for (sub = grp->grp_first; sub; sub = sub->grp_next)	442	eio_grp_cancel (grp);
490	req_cancel (sub);
491	}	443	}
492		444
493	static void req_cancel (aio_req req)	445	static void
		446	create_respipe (void)
494	{	447	{
495	req->flags |= FLAG_CANCELLED;	448	if (s_epipe_renew (&respipe))
496		449	croak ("IO::AIO: unable to initialize result pipe");
497	req_cancel_subs (req);
498	}	450	}
499		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
500	static int poll_cb ()	471	static int poll_cb (void)
501	{	472	{
502	dSP;
503	int count = 0;
504	int do_croak = 0;
505	aio_req req;
506
507	for (;;)	473	for (;;)
508	{	474	{
509	LOCK (reslock);	475	int res = eio_poll ();
510	req = reqq_shift (&res_queue);
511		476
512	if (req)	477	if (res > 0)
513	{
514	if (!res_queue.size)
515	{
516	/* read any signals sent by the worker threads */
517	char buf [32];
518	while (read (respipe [0], buf, 32) == 32)
519	;
520	}
521	}
522
523	UNLOCK (reslock);
524
525	if (!req)
526	break;	478	croak (0);
527		479
528	--nreqs;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
529		482
530	if (req->type == REQ_QUIT)	483	poll_wait ();
531	started--;
532	else if (req->type == REQ_GROUP && req->length)
533	{
534	req->fd = 1; /* mark request as delayed */
535	continue;
536	}
537	else
538	{
539	if (req->type == REQ_READ)
540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
541
542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
543	SvREADONLY_off (req->data);
544
545	if (req->statdata)
546	{
547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
548	PL_laststatval = req->result;
549	PL_statcache = *(req->statdata);
550	}
551
552	req_invoke (req);
553
554	count++;
555	}
556
557	req_free (req);
558	}	484	}
559
560	return count;
561	}
562
563	static void *aio_proc(void *arg);
564
565	static void start_thread (void)
566	{
567	sigset_t fullsigset, oldsigset;
568	pthread_attr_t attr;
569
570	worker *wrk = calloc (1, sizeof (worker));
571
572	if (!wrk)
573	croak ("unable to allocate worker thread data");
574
575	pthread_attr_init (&attr);
576	pthread_attr_setstacksize (&attr, STACKSIZE);
577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
578
579	sigfillset (&fullsigset);
580
581	LOCK (wrklock);
582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
583
584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
585	{
586	wrk->prev = &wrk_first;
587	wrk->next = wrk_first.next;
588	wrk_first.next->prev = wrk;
589	wrk_first.next = wrk;
590	started++;
591	}
592	else
593	free (wrk);
594
595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
596	UNLOCK (wrklock);
597	}
598
599	static void req_send (aio_req req)
600	{
601	while (started < wanted && nreqs >= started)
602	start_thread ();
603
604	++nreqs;
605
606	LOCK (reqlock);
607	reqq_push (&req_queue, req);
608	pthread_cond_signal (&reqwait);
609	UNLOCK (reqlock);
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	req_send (req);
622	}
623
624	static void min_parallel (int nthreads)
625	{
626	if (wanted < nthreads)
627	wanted = nthreads;
628	}
629
630	static void max_parallel (int nthreads)
631	{
632	int cur = started;
633
634	if (wanted > nthreads)
635	wanted = nthreads;
636
637	while (cur > wanted)
638	{
639	end_thread ();
640	cur--;
641	}
642
643	while (started > wanted)
644	{
645	poll_wait ();
646	poll_cb ();
647	}
648	}
649
650	static void create_pipe ()
651	{
652	if (pipe (respipe))
653	croak ("unable to initialize result pipe");
654
655	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
656	croak ("cannot set result pipe to nonblocking mode");
657
658	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
659	croak ("cannot set result pipe to nonblocking mode");
660	}
661
662	/*****************************************************************************/
663	/* work around various missing functions */
664
665	#if !HAVE_PREADWRITE
666	# define pread aio_pread
667	# define pwrite aio_pwrite
668
669	/*
670	* make our pread/pwrite safe against themselves, but not against
671	* normal read/write by using a mutex. slows down execution a lot,
672	* but that's your problem, not mine.
673	*/
674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
675
676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
677	{
678	ssize_t res;
679	off_t ooffset;
680
681	LOCK (preadwritelock);
682	ooffset = lseek (fd, 0, SEEK_CUR);
683	lseek (fd, offset, SEEK_SET);
684	res = read (fd, buf, count);
685	lseek (fd, ooffset, SEEK_SET);
686	UNLOCK (preadwritelock);
687
688	return res;
689	}
690
691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
692	{
693	ssize_t res;
694	off_t ooffset;
695
696	LOCK (preadwritelock);
697	ooffset = lseek (fd, 0, SEEK_CUR);
698	lseek (fd, offset, SEEK_SET);
699	res = write (fd, buf, count);
700	lseek (fd, offset, SEEK_SET);
701	UNLOCK (preadwritelock);
702
703	return res;
704	}
705	#endif
706
707	#if !HAVE_FDATASYNC
708	# define fdatasync fsync
709	#endif
710
711	#if !HAVE_READAHEAD
712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
713
714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
715	{
716	dBUF;
717
718	while (count > 0)
719	{
720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
721
722	pread (fd, aio_buf, len, offset);
723	offset += len;
724	count -= len;
725	}
726
727	errno = 0;
728	}
729
730	#endif
731
732	#if !HAVE_READDIR_R
733	# define readdir_r aio_readdir_r
734
735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
736
737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
738	{
739	struct dirent *e;
740	int errorno;
741
742	LOCK (readdirlock);
743
744	e = readdir (dirp);
745	errorno = errno;
746
747	if (e)
748	{
749	*res = ent;
750	strcpy (ent->d_name, e->d_name);
751	}
752	else
753	*res = 0;
754
755	UNLOCK (readdirlock);
756
757	errno = errorno;
758	return e ? 0 : -1;
759	}
760	#endif
761
762	/* sendfile always needs emulation */
763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
764	{
765	ssize_t res;
766
767	if (!count)
768	return 0;
769
770	#if HAVE_SENDFILE
771	# if __linux
772	res = sendfile (ofd, ifd, &offset, count);
773
774	# elif __freebsd
775	/*
776	* Of course, the freebsd sendfile is a dire hack with no thoughts
777	* wasted on making it similar to other I/O functions.
778	*/
779	{
780	off_t sbytes;
781	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
782
783	if (res < 0 && sbytes)
784	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
785	res = sbytes;
786	}
787
788	# elif __hpux
789	res = sendfile (ofd, ifd, offset, count, 0, 0);
790
791	# elif __solaris
792	{
793	struct sendfilevec vec;
794	size_t sbytes;
795
796	vec.sfv_fd = ifd;
797	vec.sfv_flag = 0;
798	vec.sfv_off = offset;
799	vec.sfv_len = count;
800
801	res = sendfilev (ofd, &vec, 1, &sbytes);
802
803	if (res < 0 && sbytes)
804	res = sbytes;
805	}
806
807	# endif
808	#else
809	res = -1;
810	errno = ENOSYS;
811	#endif
812
813	if (res < 0
814	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
815	#if __solaris
816	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
817	#endif
818	)
819	)
820	{
821	/* emulate sendfile. this is a major pain in the ass */
822	dBUF;
823
824	res = 0;
825
826	while (count)
827	{
828	ssize_t cnt;
829
830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
831
832	if (cnt <= 0)
833	{
834	if (cnt && !res) res = -1;
835	break;
836	}
837
838	cnt = write (ofd, aio_buf, cnt);
839
840	if (cnt <= 0)
841	{
842	if (cnt && !res) res = -1;
843	break;
844	}
845
846	offset += cnt;
847	res += cnt;
848	count -= cnt;
849	}
850	}
851
852	return res;
853	}
854
855	/* read a full directory */
856	static void scandir_ (aio_req req, worker *self)
857	{
858	DIR *dirp;
859	union
860	{
861	struct dirent d;
862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
863	} *u;
864	struct dirent *entp;
865	char *name, *names;
866	int memlen = 4096;
867	int memofs = 0;
868	int res = 0;
869	int errorno;
870
871	LOCK (wrklock);
872	self->dirp = dirp = opendir (req->dataptr);
873	self->dbuf = u = malloc (sizeof (*u));
874	UNLOCK (wrklock);
875
876	req->data2ptr = names = malloc (memlen);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}
909	}
910
911	if (errno)
912	res = -1;
913
914	req->result = res;
915	}
916
917	/*****************************************************************************/
918
919	static void *aio_proc (void *thr_arg)
920	{
921	aio_req req;
922	int type;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}
1010
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}	485	}
1038		486
1039	static void atfork_child (void)	487	static void atfork_child (void)
1040	{	488	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();	489	create_respipe ();
		490	}
1066		491
1067	atfork_parent ();	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;
1068	}	497	}
1069		498
1070	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
1071	aio_req req; \	501	aio_req req; \
1072	int req_pri = next_pri; \	502	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \	503	next_pri = EIO_PRI_DEFAULT; \
1074	\	504	\
1075	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
1076	croak ("callback must be undef or of reference type"); \
1077	\	506	\
1078	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
1079	if (!req) \	508	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
1081	\	510	\
1082	req->callback = newSVsv (callback); \	511	req->callback = SvREFCNT_inc (cb_cv); \
1083	req->pri = req_pri	512	req->pri = req_pri
1084		513
1085	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
1086	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
1087	\	518	\
1088	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
1090		521
1091	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
1092		523
1093	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
1094		525
1095	BOOT:	526	BOOT:
1096	{	527	{
		528	static const struct {
		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)
		549
		550	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		551	const_eio (SYNC_FILE_RANGE_WRITE)
		552	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		553
		554	const_eio (READDIR_DENTS)
		555	const_eio (READDIR_DIRS_FIRST)
		556	const_eio (READDIR_STAT_ORDER)
		557	const_eio (READDIR_FOUND_UNKNOWN)
		558
		559	const_eio (DT_UNKNOWN)
		560	const_eio (DT_FIFO)
		561	const_eio (DT_CHR)
		562	const_eio (DT_DIR)
		563	const_eio (DT_BLK)
		564	const_eio (DT_REG)
		565	const_eio (DT_LNK)
		566	const_eio (DT_SOCK)
		567	const_eio (DT_WHT)
		568	};
		569
1097	HV *stash = gv_stashpv ("IO::AIO", 1);	570	aio_stash = gv_stashpv ("IO::AIO" , 1);
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	571	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	572	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1101		573
		574	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		575	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		576
1102	create_pipe ();	577	create_respipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1104	}
1105		578
		579	if (eio_init (want_poll, done_poll) < 0)
		580	croak ("IO::AIO: unable to initialise eio library");
		581
		582	/* atfork child called in fifo order, so before eio's handler */
		583	X_THREAD_ATFORK (0, 0, atfork_child);
		584	}
		585
1106	void	586	void
1107	min_parallel (nthreads)	587	max_poll_reqs (int nreqs)
1108	int nthreads
1109	PROTOTYPE: $	588	PROTOTYPE: $
		589	CODE:
		590	eio_set_max_poll_reqs (nreqs);
1110		591
1111	void	592	void
1112	max_parallel (nthreads)	593	max_poll_time (double nseconds)
1113	int nthreads
1114	PROTOTYPE: $	594	PROTOTYPE: $
		595	CODE:
		596	eio_set_max_poll_time (nseconds);
1115		597
1116	void	598	void
		599	min_parallel (int nthreads)
		600	PROTOTYPE: $
		601	CODE:
		602	eio_set_min_parallel (nthreads);
		603
		604	void
		605	max_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_max_parallel (nthreads);
		609
		610	void
		611	max_idle (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_idle (nthreads);
		615
		616	void
		617	max_outstanding (int maxreqs)
		618	PROTOTYPE: $
		619	CODE:
		620	max_outstanding = maxreqs;
		621
		622	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	623	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$	624	PROTOTYPE: $$$;$
1123	PPCODE:	625	PPCODE:
1124	{	626	{
1125	dREQ;	627	dREQ;
1126		628
1127	req->type = REQ_OPEN;	629	req->type = EIO_OPEN;
1128	req->data = newSVsv (pathname);	630	req->sv1 = newSVsv (pathname);
1129	req->dataptr = SvPVbyte_nolen (req->data);	631	req->ptr1 = SvPVbyte_nolen (req->sv1);
1130	req->fd = flags;	632	req->int1 = flags;
1131	req->mode = mode;	633	req->int2 = mode;
1132		634
1133	REQ_SEND;	635	REQ_SEND;
1134	}	636	}
1135		637
1136	void	638	void
1137	aio_close (fh,callback=&PL_sv_undef)	639	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$	640	PROTOTYPE: $;$
1141	ALIAS:	641	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC	642	aio_fsync = EIO_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC	643	aio_fdatasync = EIO_FDATASYNC
1145	PPCODE:	644	PPCODE:
1146	{	645	{
		646	int fd = s_fileno_croak (fh, 0);
1147	dREQ;	647	dREQ;
1148		648
1149	req->type = ix;	649	req->type = ix;
1150	req->fh = newSVsv (fh);	650	req->sv1 = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	651	req->int1 = fd;
1152		652
1153	REQ_SEND (req);	653	REQ_SEND (req);
1154	}	654	}
1155		655
1156	void	656	void
		657	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$$$;$
		659	PPCODE:
		660	{
		661	int fd = s_fileno_croak (fh, 0);
		662	dREQ;
		663
		664	req->type = EIO_SYNC_FILE_RANGE;
		665	req->sv1 = newSVsv (fh);
		666	req->int1 = fd;
		667	req->offs = offset;
		668	req->size = nbytes;
		669	req->int2 = flags;
		670
		671	REQ_SEND (req);
		672	}
		673
		674	void
		675	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		676	PROTOTYPE: $;$
		677	PPCODE:
		678	{
		679	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		680	int fd = s_fileno_croak (fh, 0);
		681	dREQ;
		682
		683	if (close_pipe < 0)
		684	{
		685	int pipefd [2];
		686
		687	if (pipe (pipefd) < 0
		688	|| close (pipefd [1]) < 0
		689	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		690	abort (); /*D*/
		691
		692	close_pipe = pipefd [0];
		693	}
		694
		695	req->type = EIO_DUP2;
		696	req->int1 = close_pipe;
		697	req->sv2 = newSVsv (fh);
		698	req->int2 = fd;
		699
		700	REQ_SEND (req);
		701	}
		702
		703	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	704	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:	705	ALIAS:
1165	aio_read = REQ_READ	706	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	707	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$	708	PROTOTYPE: $$$$$;$
1168	PPCODE:	709	PPCODE:
1169	{	710	{
1170	aio_req req;
1171	STRLEN svlen;	711	STRLEN svlen;
		712	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1172	char *svptr = SvPVbyte (data, svlen);	713	char *svptr = SvPVbyte (data, svlen);
1173		714	UV len = SvUV (length);
1174	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);
1176		715
1177	if (dataoffset < 0)	716	if (dataoffset < 0)
1178	dataoffset += svlen;	717	dataoffset += svlen;
1179		718
1180	if (dataoffset < 0 || dataoffset > svlen)	719	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	720	croak ("dataoffset outside of data scalar");
1182		721
1183	if (ix == REQ_WRITE)	722	if (ix == EIO_WRITE)
1184	{	723	{
1185	/* write: check length and adjust. */	724	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	725	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	726	len = svlen - dataoffset;
1188	}	727	}
1189	else	728	else
1190	{	729	{
1191	/* read: grow scalar as necessary */	730	/* read: check type and grow scalar as necessary */
		731	SvUPGRADE (data, SVt_PV);
1192	svptr = SvGROW (data, length + dataoffset);	732	svptr = SvGROW (data, len + dataoffset + 1);
1193	}	733	}
1194
1195	if (length < 0)
1196	croak ("length must not be negative");
1197		734
1198	{	735	{
1199	dREQ;	736	dREQ;
1200		737
1201	req->type = ix;	738	req->type = ix;
1202	req->fh = newSVsv (fh);	739	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	740	req->int1 = fd;
1204	: IoOFP (sv_2io (fh)));	741	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	742	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	743	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	744	req->ptr2 = (char *)svptr + dataoffset;
		745	req->stroffset = dataoffset;
1209		746
1210	if (!SvREADONLY (data))	747	if (!SvREADONLY (data))
1211	{	748	{
1212	SvREADONLY_on (data);	749	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	750	req->flags |= FLAG_SV2_RO_OFF;
1214	}	751	}
1215		752
1216	REQ_SEND;	753	REQ_SEND;
1217	}	754	}
1218	}	755	}
1219		756
1220	void	757	void
		758	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		759	PROTOTYPE: $$;$
		760	PPCODE:
		761	{
		762	SV *data;
		763	dREQ;
		764
		765	req->type = EIO_READLINK;
		766	req->sv1 = newSVsv (path);
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768
		769	REQ_SEND;
		770	}
		771
		772	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	773	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1222	SV * out_fh
1223	SV * in_fh
1224	UV in_offset
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$	774	PROTOTYPE: $$$$;$
1228	PPCODE:	775	PPCODE:
1229	{	776	{
		777	int ifd = s_fileno_croak (in_fh , 0);
		778	int ofd = s_fileno_croak (out_fh, 1);
1230	dREQ;	779	dREQ;
1231		780
1232	req->type = REQ_SENDFILE;	781	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	782	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	783	req->int1 = ofd;
1235	req->fh2 = newSVsv (in_fh);	784	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	785	req->int2 = ifd;
1237	req->offset = in_offset;	786	req->offs = in_offset;
1238	req->length = length;	787	req->size = length;
1239		788
1240	REQ_SEND;	789	REQ_SEND;
1241	}	790	}
1242		791
1243	void	792	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	793	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
1250	PPCODE:	795	PPCODE:
1251	{	796	{
		797	int fd = s_fileno_croak (fh, 0);
1252	dREQ;	798	dREQ;
1253		799
1254	req->type = REQ_READAHEAD;	800	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	801	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	802	req->int1 = fd;
1257	req->offset = offset;	803	req->offs = offset;
1258	req->length = length;	804	req->size = length;
1259		805
1260	REQ_SEND;	806	REQ_SEND;
1261	}	807	}
1262		808
1263	void	809	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	810	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	811	ALIAS:
1268	aio_stat = REQ_STAT	812	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	813	aio_lstat = EIO_LSTAT
1270	PPCODE:	814	PPCODE:
1271	{	815	{
1272	dREQ;	816	dREQ;
1273		817
1274	New (0, req->statdata, 1, Stat_t);	818	req->sv1 = newSVsv (fh_or_path);
1275	if (!req->statdata)
1276	{
1277	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");
1279	}
1280		819
1281	if (SvPOK (fh_or_path))	820	if (SvPOK (req->sv1))
1282	{	821	{
1283	req->type = ix;	822	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1286	}	824	}
1287	else	825	else
1288	{	826	{
1289	req->type = REQ_FSTAT;	827	req->type = EIO_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}	829	}
1293		830
1294	REQ_SEND;	831	REQ_SEND;
1295	}	832	}
1296		833
1297	void	834	void
		835	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		841	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_UTIME;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FUTIME;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		860	PPCODE:
		861	{
		862	dREQ;
		863
		864	req->sv1 = newSVsv (fh_or_path);
		865	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_TRUNCATE;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FTRUNCATE;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		883	ALIAS:
		884	aio_chmod = EIO_CHMOD
		885	aio_mkdir = EIO_MKDIR
		886	PPCODE:
		887	{
		888	dREQ;
		889
		890	req->int2 = mode;
		891	req->sv1 = newSVsv (fh_or_path);
		892
		893	if (SvPOK (req->sv1))
		894	{
		895	req->type = ix;
		896	req->ptr1 = SvPVbyte_nolen (req->sv1);
		897	}
		898	else
		899	{
		900	req->type = EIO_FCHMOD;
		901	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		902	}
		903
		904	REQ_SEND;
		905	}
		906
		907	void
		908	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		914	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		915	req->sv1 = newSVsv (fh_or_path);
		916
		917	if (SvPOK (req->sv1))
		918	{
		919	req->type = EIO_CHOWN;
		920	req->ptr1 = SvPVbyte_nolen (req->sv1);
		921	}
		922	else
		923	{
		924	req->type = EIO_FCHOWN;
		925	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		926	}
		927
		928	REQ_SEND;
		929	}
		930
		931	void
		932	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		933	PPCODE:
		934	{
		935	dREQ;
		936
		937	req->type = EIO_READDIR;
		938	req->sv1 = newSVsv (pathname);
		939	req->ptr1 = SvPVbyte_nolen (req->sv1);
		940	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		941
		942	if (flags & EIO_READDIR_DENTS)
		943	req->int1 |= EIO_READDIR_CUSTOM2;
		944
		945	REQ_SEND;
		946	}
		947
		948	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	949	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	950	ALIAS:
1302	aio_unlink = REQ_UNLINK	951	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	952	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	953	aio_readdir = EIO_READDIR
1305	PPCODE:	954	PPCODE:
1306	{	955	{
1307	dREQ;	956	dREQ;
1308		957
1309	req->type = ix;	958	req->type = ix;
1310	req->data = newSVsv (pathname);	959	req->sv1 = newSVsv (pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	960	req->ptr1 = SvPVbyte_nolen (req->sv1);
		961
		962	REQ_SEND;
		963	}
		964
		965	void
		966	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		967	ALIAS:
		968	aio_link = EIO_LINK
		969	aio_symlink = EIO_SYMLINK
		970	aio_rename = EIO_RENAME
		971	PPCODE:
		972	{
		973	dREQ;
		974
		975	req->type = ix;
		976	req->sv1 = newSVsv (oldpath);
		977	req->ptr1 = SvPVbyte_nolen (req->sv1);
		978	req->sv2 = newSVsv (newpath);
		979	req->ptr2 = SvPVbyte_nolen (req->sv2);
1312		980
1313	REQ_SEND;	981	REQ_SEND;
1314	}	982	}
1315		983
1316	void	984	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	985	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:
1322	aio_link = REQ_LINK
1323	aio_symlink = REQ_SYMLINK
1324	aio_rename = REQ_RENAME
1325	PPCODE:	986	PPCODE:
1326	{	987	{
1327	dREQ;	988	dREQ;
1328		989
1329	req->type = ix;	990	req->type = EIO_MKNOD;
1330	req->fh = newSVsv (oldpath);	991	req->sv1 = newSVsv (pathname);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	992	req->ptr1 = SvPVbyte_nolen (req->sv1);
1332	req->data = newSVsv (newpath);	993	req->int2 = (mode_t)mode;
1333	req->dataptr = SvPVbyte_nolen (req->data);	994	req->offs = dev;
1334		995
1335	REQ_SEND;	996	REQ_SEND;
1336	}	997	}
1337		998
1338	void	999	void
1339	aio_busy (delay,callback=&PL_sv_undef)	1000	aio_busy (double delay, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	1001	PPCODE:
1343	{	1002	{
1344	dREQ;	1003	dREQ;
1345		1004
1346	req->type = REQ_BUSY;	1005	req->type = EIO_BUSY;
1347	req->fd = delay < 0. ? 0 : delay;	1006	req->nv1 = delay < 0. ? 0. : delay;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349		1007
1350	REQ_SEND;	1008	REQ_SEND;
1351	}	1009	}
1352		1010
1353	void	1011	void
1354	aio_group (callback=&PL_sv_undef)	1012	aio_group (SV *callback=&PL_sv_undef)
1355	SV * callback
1356	PROTOTYPE: ;$	1013	PROTOTYPE: ;$
1357	PPCODE:	1014	PPCODE:
1358	{	1015	{
1359	dREQ;	1016	dREQ;
1360		1017
1361	req->type = REQ_GROUP;	1018	req->type = EIO_GROUP;
		1019
1362	req_send (req);	1020	req_submit (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1021	XPUSHs (req_sv (req, aio_grp_stash));
1365	}	1022	}
1366		1023
1367	void	1024	void
1368	aio_nop (callback=&PL_sv_undef)	1025	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback	1026	ALIAS:
		1027	aio_nop = EIO_NOP
		1028	aio_sync = EIO_SYNC
1370	PPCODE:	1029	PPCODE:
1371	{	1030	{
1372	dREQ;	1031	dREQ;
1373		1032
1374	req->type = REQ_NOP;	1033	req->type = ix;
1375		1034
1376	REQ_SEND;	1035	REQ_SEND;
1377	}	1036	}
1378		1037
1379	void	1038	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	1039	aioreq_pri (int pri = 0)
1381	CODE:	1040	PROTOTYPE: ;$
		1041	CODE:
		1042	RETVAL = next_pri;
		1043	if (items > 0)
		1044	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	1045	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	1046	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	1047	next_pri = pri;
		1048	}
		1049	OUTPUT:
		1050	RETVAL
1385		1051
1386	void	1052	void
1387	aioreq_nice (int nice = 0)	1053	aioreq_nice (int nice = 0)
1388	CODE:	1054	CODE:
1389	nice = next_pri - nice;	1055	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	1056	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	1057	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	1058	next_pri = nice;
1393		1059
1394	void	1060	void
1395	flush ()	1061	flush ()
1396	PROTOTYPE:	1062	PROTOTYPE:
1397	CODE:	1063	CODE:
1398	while (nreqs)	1064	while (eio_nreqs ())
1399	{	1065	{
1400	poll_wait ();	1066	poll_wait ();
1401	poll_cb ();	1067	poll_cb ();
1402	}	1068	}
1403		1069
1404	void	1070	int
1405	poll()	1071	poll()
1406	PROTOTYPE:	1072	PROTOTYPE:
1407	CODE:	1073	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	1074	poll_wait ();
1411	poll_cb ();	1075	RETVAL = poll_cb ();
1412	}	1076	OUTPUT:
		1077	RETVAL
1413		1078
1414	int	1079	int
1415	poll_fileno()	1080	poll_fileno()
1416	PROTOTYPE:	1081	PROTOTYPE:
1417	CODE:	1082	CODE:
1418	RETVAL = respipe [0];	1083	RETVAL = s_epipe_fd (&respipe);
1419	OUTPUT:	1084	OUTPUT:
1420	RETVAL	1085	RETVAL
1421		1086
1422	int	1087	int
1423	poll_cb(...)	1088	poll_cb(...)
…		…
1429		1094
1430	void	1095	void
1431	poll_wait()	1096	poll_wait()
1432	PROTOTYPE:	1097	PROTOTYPE:
1433	CODE:	1098	CODE:
1434	if (nreqs)
1435	poll_wait ();	1099	poll_wait ();
1436		1100
1437	int	1101	int
1438	nreqs()	1102	nreqs()
1439	PROTOTYPE:	1103	PROTOTYPE:
1440	CODE:	1104	CODE:
1441	RETVAL = nreqs;	1105	RETVAL = eio_nreqs ();
1442	OUTPUT:	1106	OUTPUT:
1443	RETVAL	1107	RETVAL
1444		1108
		1109	int
		1110	nready()
		1111	PROTOTYPE:
		1112	CODE:
		1113	RETVAL = eio_nready ();
		1114	OUTPUT:
		1115	RETVAL
		1116
		1117	int
		1118	npending()
		1119	PROTOTYPE:
		1120	CODE:
		1121	RETVAL = eio_npending ();
		1122	OUTPUT:
		1123	RETVAL
		1124
		1125	int
		1126	nthreads()
		1127	PROTOTYPE:
		1128	CODE:
		1129	RETVAL = eio_nthreads ();
		1130	OUTPUT:
		1131	RETVAL
		1132
		1133	int
		1134	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1135	PROTOTYPE: $$$$
		1136	CODE:
		1137	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1138	RETVAL = posix_fadvise (fh, offset, length, advice);
		1139	#else
		1140	RETVAL = errno = ENOSYS;
		1141	#endif
		1142	OUTPUT:
		1143	RETVAL
		1144
		1145	ssize_t
		1146	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1147	PROTOTYPE: $$$$
		1148	CODE:
		1149	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1150	OUTPUT:
		1151	RETVAL
		1152
		1153	void _on_next_submit (SV *cb)
		1154	CODE:
		1155	SvREFCNT_dec (on_next_submit);
		1156	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1157
1445	PROTOTYPES: DISABLE	1158	PROTOTYPES: DISABLE
1446		1159
1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1160	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1448		1161
1449	void	1162	void
1450	cancel (aio_req_ornot req)	1163	cancel (aio_req_ornot req)
1451	CODE:	1164	CODE:
1452	req_cancel (req);	1165	eio_cancel (req);
1453		1166
1454	void	1167	void
1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1168	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1456	CODE:	1169	PPCODE:
		1170	{
		1171	if (GIMME_V != G_VOID)
		1172	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1173
		1174	if (items > 1)
		1175	{
		1176	SV *cb_cv =get_cb (callback);
		1177
1457	SvREFCNT_dec (req->callback);	1178	SvREFCNT_dec (req->callback);
1458	req->callback = newSVsv (callback);	1179	req->callback = SvREFCNT_inc (cb_cv);
		1180	}
		1181	}
1459		1182
1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1183	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1461		1184
1462	void	1185	void
1463	add (aio_req grp, ...)	1186	add (aio_req grp, ...)
1464	PPCODE:	1187	PPCODE:
1465	{	1188	{
1466	int i;	1189	int i;
1467	aio_req req;
1468		1190
1469	if (grp->fd == 2)	1191	if (grp->int1 == 2)
1470	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1192	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1471		1193
1472	for (i = 1; i < items; ++i )	1194	for (i = 1; i < items; ++i )
1473	{	1195	{
		1196	aio_req req;
		1197
1474	if (GIMME_V != G_VOID)	1198	if (GIMME_V != G_VOID)
1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1199	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1476		1200
1477	req = SvAIO_REQ (ST (i));	1201	req = SvAIO_REQ (ST (i));
1478		1202
1479	if (req)	1203	if (req)
1480	{	1204	eio_grp_add (grp, req);
1481	++grp->length;
1482	req->grp = grp;
1483
1484	req->grp_prev = 0;
1485	req->grp_next = grp->grp_first;
1486
1487	if (grp->grp_first)
1488	grp->grp_first->grp_prev = req;
1489
1490	grp->grp_first = req;
1491	}
1492	}	1205	}
1493	}	1206	}
1494		1207
1495	void	1208	void
1496	cancel_subs (aio_req_ornot req)	1209	cancel_subs (aio_req_ornot req)
…		…
1500	void	1213	void
1501	result (aio_req grp, ...)	1214	result (aio_req grp, ...)
1502	CODE:	1215	CODE:
1503	{	1216	{
1504	int i;	1217	int i;
		1218	AV *av;
		1219
		1220	grp->errorno = errno;
		1221
1505	AV *av = newAV ();	1222	av = newAV ();
		1223	av_extend (av, items - 1);
1506		1224
1507	for (i = 1; i < items; ++i )	1225	for (i = 1; i < items; ++i )
1508	av_push (av, newSVsv (ST (i)));	1226	av_push (av, newSVsv (ST (i)));
1509		1227
1510	SvREFCNT_dec (grp->data);	1228	SvREFCNT_dec (grp->sv1);
1511	grp->data = (SV *)av;	1229	grp->sv1 = (SV *)av;
1512	}	1230	}
		1231
		1232	void
		1233	errno (aio_req grp, int errorno = errno)
		1234	CODE:
		1235	grp->errorno = errorno;
1513		1236
1514	void	1237	void
1515	limit (aio_req grp, int limit)	1238	limit (aio_req grp, int limit)
1516	CODE:	1239	CODE:
1517	grp->fd2 = limit;	1240	eio_grp_limit (grp, limit);
1518	aio_grp_feed (grp);
1519		1241
1520	void	1242	void
1521	feed (aio_req grp, SV *callback=&PL_sv_undef)	1243	feed (aio_req grp, SV *callback=&PL_sv_undef)
1522	CODE:	1244	CODE:
1523	{	1245	{
1524	SvREFCNT_dec (grp->fh2);	1246	SvREFCNT_dec (grp->sv2);
1525	grp->fh2 = newSVsv (callback);	1247	grp->sv2 = newSVsv (callback);
		1248	grp->feed = aio_grp_feed;
1526		1249
1527	if (grp->fd2 <= 0)	1250	if (grp->int2 <= 0)
1528	grp->fd2 = 2;	1251	grp->int2 = 2;
1529		1252
1530	aio_grp_feed (grp);	1253	eio_grp_limit (grp, grp->int2);
1531	}	1254	}
1532		1255

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