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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.73 by root, Tue Oct 24 21:26:30 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	#if __ia64	91	/*****************************************************************************/
53	# define STACKSIZE 65536	92
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	93	#if __GNUC__ >= 3
55	# define STACKSIZE PTHREAD_STACK_MIN	94	# define expect(expr,value) __builtin_expect ((expr),(value))
56	#else	95	#else
57	# define STACKSIZE 16384	96	# define expect(expr,value) (expr)
58	#endif	97	#endif
59		98
60	/* buffer size for various temporary buffers */	99	#define expect_false(expr) expect ((expr) != 0, 0)
61	#define AIO_BUFSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
62		101
63	#define dBUF \	102	/*****************************************************************************/
64	char *aio_buf; \	103
65	LOCK (wrklock); \	104	typedef SV SV8; /* byte-sv, used for argument-checking */
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	105	typedef int aio_rfd; /* read file desriptor */
67	UNLOCK (wrklock); \	106	typedef int aio_wfd; /* write file descriptor */
68	if (!aio_buf) \	107
69	return -1;	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)
70		149
71	enum {	150	enum {
72	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};	152	};
84		153
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		155
88	typedef struct aio_cb
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;
93	SV *fh, *fh2;
94	void *dataptr, *data2ptr;
95	Stat_t *statdata;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99
100	STRLEN dataoffset;
101	int type;
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105
106	unsigned char flags;
107	unsigned char pri;
108
109	SV *self; /* the perl counterpart of this request, if any */
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
111	} aio_cb;
112
113	enum {
114	FLAG_CANCELLED = 0x01,
115	};
116
117	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
119		158
120	enum {	159	static SV *on_next_submit;
121	PRI_MIN = -4,	160	static int next_pri = EIO_PRI_DEFAULT;
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int max_outstanding = 1<<30;	161	static int max_outstanding;
134	static int respipe [2];
135		162
136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	163	static s_epipe respipe;
137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138	#else
139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140	#endif
141		164
142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145	/* worker threasd management */
146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148	typedef struct worker {
149	/* locked by wrklock */
150	struct worker *prev, *next;
151
152	pthread_t tid;
153
154	/* locked by reslock, reqlock or wrklock */
155	aio_req req; /* currently processed request */
156	void *dbuf;
157	DIR *dirp;
158	} worker;
159
160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162	static void worker_clear (worker *wrk)
163	{
164	if (wrk->dirp)
165	{
166	closedir (wrk->dirp);
167	wrk->dirp = 0;
168	}
169
170	if (wrk->dbuf)
171	{
172	free (wrk->dbuf);
173	wrk->dbuf = 0;
174	}
175	}
176
177	static void worker_free (worker *wrk)
178	{
179	wrk->next->prev = wrk->prev;
180	wrk->prev->next = wrk->next;
181
182	free (wrk);
183	}
184
185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
188
189	/*
190	* a somewhat faster data structure might be nice, but
191	* with 8 priorities this actually needs <20 insns
192	* per shift, the most expensive operation.
193	*/
194	typedef struct {
195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196	int size;
197	} reqq;
198
199	static reqq req_queue;
200	static reqq res_queue;
201
202	int reqq_push (reqq *q, aio_req req)
203	{
204	int pri = req->pri;
205	req->next = 0;
206
207	if (q->qe[pri])
208	{
209	q->qe[pri]->next = req;
210	q->qe[pri] = req;
211	}
212	else
213	q->qe[pri] = q->qs[pri] = req;
214
215	return q->size++;
216	}
217
218	aio_req reqq_shift (reqq *q)
219	{
220	int pri;
221
222	if (!q->size)
223	return 0;
224
225	--q->size;
226
227	for (pri = NUM_PRI; pri--; )
228	{
229	aio_req req = q->qs[pri];
230
231	if (req)
232	{
233	if (!(q->qs[pri] = req->next))
234	q->qe[pri] = 0;
235
236	return req;
237	}
238	}
239
240	abort ();
241	}
242
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	165	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	166	static void req_cancel (aio_req req);
246		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
247	/* must be called at most once */	180	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
249	{	182	{
250	if (!req->self)	183	if (!req->self)
251	{	184	{
252	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254	}	187	}
255		188
256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
257	}	190	}
258		191
259	static aio_req SvAIO_REQ (SV *sv)	192	static aio_req SvAIO_REQ (SV *sv)
260	{	193	{
261	MAGIC *mg;	194	MAGIC *mg;
262		195
263	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")))
264	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class IO::AIO::REQ expected");
265		201
266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267		203
268	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	205	}
270		206
271	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
272	{	208	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	209	if (grp->sv2 && SvOK (grp->sv2))
274	{	210	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	211	dSP;
280		212
281	ENTER;	213	ENTER;
282	SAVETMPS;	214	SAVETMPS;
283	PUSHMARK (SP);	215	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	XPUSHs (req_sv (grp, aio_grp_stash));
285	PUTBACK;	217	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	219	SPAGAIN;
288	FREETMPS;	220	FREETMPS;
289	LEAVE;	221	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	222	}
300	}	223	}
301		224
302	static void aio_grp_dec (aio_req grp)	225	static void req_submit (eio_req *req)
303	{	226	{
304	--grp->length;	227	eio_submit (req);
305		228
306	/* call feeder, if applicable */	229	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	230	{
312	req_invoke (grp);	231	dSP;
313	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);
314	}	239	}
315	}	240	}
316		241
317	static void poll_wait ()	242	static int req_invoke (eio_req *req)
318	{	243	{
319	fd_set rfd;	244	dSP;
320		245
321	while (nreqs)	246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
322	{	250	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;
345
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347	{
348	errno = req->errorno;
349
350	ENTER;	251	ENTER;
351	SAVETMPS;	252	SAVETMPS;
352	PUSHMARK (SP);	253	PUSHMARK (SP);
353	EXTEND (SP, 1);	254	EXTEND (SP, 1);
354		255
355	switch (req->type)	256	switch (req->type)
356	{	257	{
357	case REQ_READDIR:	258	case EIO_READDIR:
358	{	259	{
359	SV *rv = &PL_sv_undef;	260	SV *rv = &PL_sv_undef;
360		261
361	if (req->result >= 0)	262	if (req->result >= 0)
362	{	263	{
363	int i;	264	int i;
364	char *buf = req->data2ptr;	265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
365	AV *av = newAV ();	267	AV *av = newAV ();
366		268
367	av_extend (av, req->result - 1);	269	av_extend (av, req->result - 1);
368		270
369	for (i = 0; i < req->result; ++i)	271	for (i = 0; i < req->result; ++i)
370	{	272	{
371	SV *sv = newSVpv (buf, 0);	273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
372		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
373	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);
374	buf += SvCUR (sv) + 1;	305	names += SvCUR (name) + 1;
		306	}
375	}	307	}
376		308
377	rv = sv_2mortal (newRV_noinc ((SV *)av));	309	rv = sv_2mortal (newRV_noinc ((SV *)av));
378	}	310	}
379		311
380	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))));
381	}	316	}
382	break;	317	break;
383		318
384	case REQ_OPEN:	319	case EIO_OPEN:
385	{	320	{
386	/* convert fd to fh */	321	/* convert fd to fh */
387	SV *fh;	322	SV *fh = &PL_sv_undef;
388		323
389	PUSHs (sv_2mortal (newSViv (req->result)));	324	if (req->result >= 0)
390	PUTBACK;	325	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	326	GV *gv = (GV *)sv_newmortal ();
392	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);
393		333
394	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	);
395		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
396	PUSHMARK (SP);	346	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	347	}
399	break;	348	break;
400		349
401	case REQ_GROUP:	350	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	351	req->int1 = 2; /* mark group as finished */
403		352
404	if (req->data)	353	if (req->sv1)
405	{	354	{
406	int i;	355	int i;
407	AV *av = (AV *)req->data;	356	AV *av = (AV *)req->sv1;
408		357
409	EXTEND (SP, AvFILL (av) + 1);	358	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	359	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	360	PUSHs (*av_fetch (av, i, 0));
412	}	361	}
413	break;	362	break;
414		363
415	case REQ_NOP:	364	case EIO_NOP:
416	case REQ_BUSY:	365	case EIO_BUSY:
417	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 */
418		396
419	default:	397	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	398	PUSHs (sv_2mortal (newSViv (req->result)));
421	break;	399	break;
422	}	400	}
423		401
		402	errno = req->errorno;
424		403
425	PUTBACK;	404	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	406	SPAGAIN;
428		407
429	FREETMPS;	408	FREETMPS;
430	LEAVE;	409	LEAVE;
		410
		411	PUTBACK;
431	}	412	}
432		413
433	if (req->grp)	414	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	415	}
453		416
454	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
455	{	418	{
456	if (req->self)	419	if (req->self)
457	{	420	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
460	}	423	}
461		424
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		428
471	Safefree (req);	429	Safefree (req);
472	}	430	}
473		431
474	static void req_cancel_subs (aio_req grp)	432	static void req_cancel_subs (aio_req grp)
475	{	433	{
476	aio_req sub;	434	aio_req sub;
477		435
478	if (grp->type != REQ_GROUP)	436	if (grp->type != EIO_GROUP)
479	return;	437	return;
480		438
481	SvREFCNT_dec (grp->fh2);	439	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	440	grp->sv2 = 0;
483		441
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	442	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	443	}
487		444
488	static void req_cancel (aio_req req)	445	static void
		446	create_respipe (void)
489	{	447	{
490	req->flags |= FLAG_CANCELLED;	448	if (s_epipe_renew (&respipe))
491		449	croak ("IO::AIO: unable to initialize result pipe");
492	req_cancel_subs (req);
493	}	450	}
494		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
495	static int poll_cb ()	471	static int poll_cb (void)
496	{	472	{
497	dSP;
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501
502	for (;;)	473	for (;;)
503	{	474	{
504	LOCK (reslock);	475	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		476
507	if (req)	477	if (res > 0)
508	{
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;	478	croak (0);
522		479
523	--nreqs;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
524		482
525	if (req->type == REQ_QUIT)	483	poll_wait ();
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	484	}
554
555	return count;
556	}
557
558	static void *aio_proc(void *arg);
559
560	static void start_thread (void)
561	{
562	sigset_t fullsigset, oldsigset;
563	pthread_attr_t attr;
564
565	worker *wrk = calloc (1, sizeof (worker));
566
567	if (!wrk)
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{
581	wrk->prev = &wrk_first;
582	wrk->next = wrk_first.next;
583	wrk_first.next->prev = wrk;
584	wrk_first.next = wrk;
585	started++;
586	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}
593
594	static void req_send (aio_req req)
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598
599	++nreqs;
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605
606	if (nreqs > max_outstanding)
607	for (;;)
608	{
609	poll_cb ();
610
611	if (nreqs <= max_outstanding)
612	break;
613
614	poll_wait ();
615	}
616	}
617
618	static void end_thread (void)
619	{
620	aio_req req;
621
622	Newz (0, req, 1, aio_cb);
623
624	req->type = REQ_QUIT;
625	req->pri = PRI_MAX + PRI_BIAS;
626
627	req_send (req);
628	}
629
630	static void min_parallel (int nthreads)
631	{
632	if (wanted < nthreads)
633	wanted = nthreads;
634	}
635
636	static void max_parallel (int nthreads)
637	{
638	int cur = started;
639
640	if (wanted > nthreads)
641	wanted = nthreads;
642
643	while (cur > wanted)
644	{
645	end_thread ();
646	cur--;
647	}
648
649	while (started > wanted)
650	{
651	poll_wait ();
652	poll_cb ();
653	}
654	}
655
656	static void create_pipe ()
657	{
658	if (pipe (respipe))
659	croak ("unable to initialize result pipe");
660
661	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
662	croak ("cannot set result pipe to nonblocking mode");
663
664	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
665	croak ("cannot set result pipe to nonblocking mode");
666	}
667
668	/*****************************************************************************/
669	/* work around various missing functions */
670
671	#if !HAVE_PREADWRITE
672	# define pread aio_pread
673	# define pwrite aio_pwrite
674
675	/*
676	* make our pread/pwrite safe against themselves, but not against
677	* normal read/write by using a mutex. slows down execution a lot,
678	* but that's your problem, not mine.
679	*/
680	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
681
682	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
683	{
684	ssize_t res;
685	off_t ooffset;
686
687	LOCK (preadwritelock);
688	ooffset = lseek (fd, 0, SEEK_CUR);
689	lseek (fd, offset, SEEK_SET);
690	res = read (fd, buf, count);
691	lseek (fd, ooffset, SEEK_SET);
692	UNLOCK (preadwritelock);
693
694	return res;
695	}
696
697	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
698	{
699	ssize_t res;
700	off_t ooffset;
701
702	LOCK (preadwritelock);
703	ooffset = lseek (fd, 0, SEEK_CUR);
704	lseek (fd, offset, SEEK_SET);
705	res = write (fd, buf, count);
706	lseek (fd, offset, SEEK_SET);
707	UNLOCK (preadwritelock);
708
709	return res;
710	}
711	#endif
712
713	#if !HAVE_FDATASYNC
714	# define fdatasync fsync
715	#endif
716
717	#if !HAVE_READAHEAD
718	# define readahead aio_readahead
719
720	static ssize_t readahead (int fd, off_t offset, size_t count)
721	{
722	dBUF;
723
724	while (count > 0)
725	{
726	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
727
728	pread (fd, aio_buf, len, offset);
729	offset += len;
730	count -= len;
731	}
732
733	errno = 0;
734	}
735	#endif
736
737	#if !HAVE_READDIR_R
738	# define readdir_r aio_readdir_r
739
740	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
741
742	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
743	{
744	struct dirent *e;
745	int errorno;
746
747	LOCK (readdirlock);
748
749	e = readdir (dirp);
750	errorno = errno;
751
752	if (e)
753	{
754	*res = ent;
755	strcpy (ent->d_name, e->d_name);
756	}
757	else
758	*res = 0;
759
760	UNLOCK (readdirlock);
761
762	errno = errorno;
763	return e ? 0 : -1;
764	}
765	#endif
766
767	/* sendfile always needs emulation */
768	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
769	{
770	ssize_t res;
771
772	if (!count)
773	return 0;
774
775	#if HAVE_SENDFILE
776	# if __linux
777	res = sendfile (ofd, ifd, &offset, count);
778
779	# elif __freebsd
780	/*
781	* Of course, the freebsd sendfile is a dire hack with no thoughts
782	* wasted on making it similar to other I/O functions.
783	*/
784	{
785	off_t sbytes;
786	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
787
788	if (res < 0 && sbytes)
789	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
790	res = sbytes;
791	}
792
793	# elif __hpux
794	res = sendfile (ofd, ifd, offset, count, 0, 0);
795
796	# elif __solaris
797	{
798	struct sendfilevec vec;
799	size_t sbytes;
800
801	vec.sfv_fd = ifd;
802	vec.sfv_flag = 0;
803	vec.sfv_off = offset;
804	vec.sfv_len = count;
805
806	res = sendfilev (ofd, &vec, 1, &sbytes);
807
808	if (res < 0 && sbytes)
809	res = sbytes;
810	}
811
812	# endif
813	#else
814	res = -1;
815	errno = ENOSYS;
816	#endif
817
818	if (res < 0
819	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
820	#if __solaris
821	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
822	#endif
823	)
824	)
825	{
826	/* emulate sendfile. this is a major pain in the ass */
827	dBUF;
828
829	res = 0;
830
831	while (count)
832	{
833	ssize_t cnt;
834
835	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
836
837	if (cnt <= 0)
838	{
839	if (cnt && !res) res = -1;
840	break;
841	}
842
843	cnt = write (ofd, aio_buf, cnt);
844
845	if (cnt <= 0)
846	{
847	if (cnt && !res) res = -1;
848	break;
849	}
850
851	offset += cnt;
852	res += cnt;
853	count -= cnt;
854	}
855	}
856
857	return res;
858	}
859
860	/* read a full directory */
861	static void scandir_ (aio_req req, worker *self)
862	{
863	DIR *dirp;
864	union
865	{
866	struct dirent d;
867	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
868	} *u;
869	struct dirent *entp;
870	char *name, *names;
871	int memlen = 4096;
872	int memofs = 0;
873	int res = 0;
874	int errorno;
875
876	LOCK (wrklock);
877	self->dirp = dirp = opendir (req->dataptr);
878	self->dbuf = u = malloc (sizeof (*u));
879	UNLOCK (wrklock);
880
881	req->data2ptr = names = malloc (memlen);
882
883	if (dirp && u && names)
884	for (;;)
885	{
886	errno = 0;
887	readdir_r (dirp, &u->d, &entp);
888
889	if (!entp)
890	break;
891
892	name = entp->d_name;
893
894	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
895	{
896	int len = strlen (name) + 1;
897
898	res++;
899
900	while (memofs + len > memlen)
901	{
902	memlen *= 2;
903	LOCK (wrklock);
904	req->data2ptr = names = realloc (names, memlen);
905	UNLOCK (wrklock);
906
907	if (!names)
908	break;
909	}
910
911	memcpy (names + memofs, name, len);
912	memofs += len;
913	}
914	}
915
916	if (errno)
917	res = -1;
918
919	req->result = res;
920	}
921
922	/*****************************************************************************/
923
924	static void *aio_proc (void *thr_arg)
925	{
926	aio_req req;
927	int type;
928	worker *self = (worker *)thr_arg;
929
930	do
931	{
932	LOCK (reqlock);
933
934	for (;;)
935	{
936	self->req = req = reqq_shift (&req_queue);
937
938	if (req)
939	break;
940
941	pthread_cond_wait (&reqwait, &reqlock);
942	}
943
944	UNLOCK (reqlock);
945
946	errno = 0; /* strictly unnecessary */
947	type = req->type; /* remember type for QUIT check */
948
949	if (!(req->flags & FLAG_CANCELLED))
950	switch (type)
951	{
952	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
953	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
954
955	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
956	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
957
958	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
959	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
960	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
961
962	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
963	case REQ_CLOSE: req->result = close (req->fd); break;
964	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
965	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
966	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
967	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
968	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
969
970	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
971	case REQ_FSYNC: req->result = fsync (req->fd); break;
972	case REQ_READDIR: scandir_ (req, self); break;
973
974	case REQ_BUSY:
975	{
976	struct timeval tv;
977
978	tv.tv_sec = req->fd;
979	tv.tv_usec = req->fd2;
980
981	req->result = select (0, 0, 0, 0, &tv);
982	}
983
984	case REQ_GROUP:
985	case REQ_NOP:
986	case REQ_QUIT:
987	break;
988
989	default:
990	req->result = ENOSYS;
991	break;
992	}
993
994	req->errorno = errno;
995
996	LOCK (reslock);
997
998	if (!reqq_push (&res_queue, req))
999	/* write a dummy byte to the pipe so fh becomes ready */
1000	write (respipe [1], &respipe, 1);
1001
1002	self->req = 0;
1003	worker_clear (self);
1004
1005	UNLOCK (reslock);
1006	}
1007	while (type != REQ_QUIT);
1008
1009	LOCK (wrklock);
1010	worker_free (self);
1011	UNLOCK (wrklock);
1012
1013	return 0;
1014	}
1015
1016	/*****************************************************************************/
1017
1018	static void atfork_prepare (void)
1019	{
1020	LOCK (wrklock);
1021	LOCK (reqlock);
1022	LOCK (reslock);
1023	#if !HAVE_PREADWRITE
1024	LOCK (preadwritelock);
1025	#endif
1026	#if !HAVE_READDIR_R
1027	LOCK (readdirlock);
1028	#endif
1029	}
1030
1031	static void atfork_parent (void)
1032	{
1033	#if !HAVE_READDIR_R
1034	UNLOCK (readdirlock);
1035	#endif
1036	#if !HAVE_PREADWRITE
1037	UNLOCK (preadwritelock);
1038	#endif
1039	UNLOCK (reslock);
1040	UNLOCK (reqlock);
1041	UNLOCK (wrklock);
1042	}	485	}
1043		486
1044	static void atfork_child (void)	487	static void atfork_child (void)
1045	{	488	{
1046	aio_req prv;
1047
1048	while (prv = reqq_shift (&req_queue))
1049	req_free (prv);
1050
1051	while (prv = reqq_shift (&res_queue))
1052	req_free (prv);
1053
1054	while (wrk_first.next != &wrk_first)
1055	{
1056	worker *wrk = wrk_first.next;
1057
1058	if (wrk->req)
1059	req_free (wrk->req);
1060
1061	worker_clear (wrk);
1062	worker_free (wrk);
1063	}
1064
1065	started = 0;
1066	nreqs = 0;
1067
1068	close (respipe [0]);
1069	close (respipe [1]);
1070	create_pipe ();	489	create_respipe ();
		490	}
1071		491
1072	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;
1073	}	497	}
1074		498
1075	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
1076	aio_req req; \	501	aio_req req; \
1077	int req_pri = next_pri; \	502	int req_pri = next_pri; \
1078	next_pri = DEFAULT_PRI + PRI_BIAS; \	503	next_pri = EIO_PRI_DEFAULT; \
1079	\	504	\
1080	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
1081	croak ("callback must be undef or of reference type"); \
1082	\	506	\
1083	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
1084	if (!req) \	508	if (!req) \
1085	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
1086	\	510	\
1087	req->callback = newSVsv (callback); \	511	req->callback = SvREFCNT_inc (cb_cv); \
1088	req->pri = req_pri	512	req->pri = req_pri
1089		513
1090	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
1091	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
1092	\	518	\
1093	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
1094	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
1095		521
1096	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
1097		523
1098	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
1099		525
1100	BOOT:	526	BOOT:
1101	{	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
1102	HV *stash = gv_stashpv ("IO::AIO", 1);	570	aio_stash = gv_stashpv ("IO::AIO" , 1);
1103	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	571	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1104	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	572	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1105	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1106		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
1107	create_pipe ();	577	create_respipe ();
1108	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1109	}
1110		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
1111	void	586	void
1112	min_parallel (nthreads)	587	max_poll_reqs (int nreqs)
1113	int nthreads
1114	PROTOTYPE: $	588	PROTOTYPE: $
		589	CODE:
		590	eio_set_max_poll_reqs (nreqs);
1115		591
1116	void	592	void
1117	max_parallel (nthreads)	593	max_poll_time (double nseconds)
1118	int nthreads
1119	PROTOTYPE: $	594	PROTOTYPE: $
1120
1121	int
1122	max_outstanding (nreqs)
1123	int nreqs
1124	PROTOTYPE: $
1125	CODE:	595	CODE:
1126	RETVAL = max_outstanding;	596	eio_set_max_poll_time (nseconds);
		597
		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:
1127	max_outstanding = nreqs;	620	max_outstanding = maxreqs;
1128		621
1129	void	622	void
1130	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	623	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1131	SV * pathname
1132	int flags
1133	int mode
1134	SV * callback
1135	PROTOTYPE: $$$;$	624	PROTOTYPE: $$$;$
1136	PPCODE:	625	PPCODE:
1137	{	626	{
1138	dREQ;	627	dREQ;
1139		628
1140	req->type = REQ_OPEN;	629	req->type = EIO_OPEN;
1141	req->data = newSVsv (pathname);	630	req->sv1 = newSVsv (pathname);
1142	req->dataptr = SvPVbyte_nolen (req->data);	631	req->ptr1 = SvPVbyte_nolen (req->sv1);
1143	req->fd = flags;	632	req->int1 = flags;
1144	req->mode = mode;	633	req->int2 = mode;
1145		634
1146	REQ_SEND;	635	REQ_SEND;
1147	}	636	}
1148		637
1149	void	638	void
1150	aio_close (fh,callback=&PL_sv_undef)	639	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1151	SV * fh
1152	SV * callback
1153	PROTOTYPE: $;$	640	PROTOTYPE: $;$
1154	ALIAS:	641	ALIAS:
1155	aio_close = REQ_CLOSE
1156	aio_fsync = REQ_FSYNC	642	aio_fsync = EIO_FSYNC
1157	aio_fdatasync = REQ_FDATASYNC	643	aio_fdatasync = EIO_FDATASYNC
1158	PPCODE:	644	PPCODE:
1159	{	645	{
		646	int fd = s_fileno_croak (fh, 0);
1160	dREQ;	647	dREQ;
1161		648
1162	req->type = ix;	649	req->type = ix;
1163	req->fh = newSVsv (fh);	650	req->sv1 = newSVsv (fh);
1164	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	651	req->int1 = fd;
1165		652
1166	REQ_SEND (req);	653	REQ_SEND (req);
1167	}	654	}
1168		655
1169	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: $$$$;$
		659	PPCODE:
		660	{
		661	int fd = s_fileno_croak (fh, 0);
		662	dREQ;
		663
		664	req->type = EIO_SYNC_FILE_RANGE;
		665	req->sv1 = newSVsv (fh);
		666	req->int1 = fd;
		667	req->offs = offset;
		668	req->size = nbytes;
		669	req->int2 = flags;
		670
		671	REQ_SEND (req);
		672	}
		673
		674	void
		675	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		676	PROTOTYPE: $;$
		677	PPCODE:
		678	{
		679	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		680	int fd = s_fileno_croak (fh, 0);
		681	dREQ;
		682
		683	if (close_pipe < 0)
		684	{
		685	int pipefd [2];
		686
		687	if (pipe (pipefd) < 0
		688	|| close (pipefd [1]) < 0
		689	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		690	abort (); /*D*/
		691
		692	close_pipe = pipefd [0];
		693	}
		694
		695	req->type = EIO_DUP2;
		696	req->int1 = close_pipe;
		697	req->sv2 = newSVsv (fh);
		698	req->int2 = fd;
		699
		700	REQ_SEND (req);
		701	}
		702
		703	void
1170	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	704	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1171	SV * fh
1172	UV offset
1173	UV length
1174	SV * data
1175	UV dataoffset
1176	SV * callback
1177	ALIAS:	705	ALIAS:
1178	aio_read = REQ_READ	706	aio_read = EIO_READ
1179	aio_write = REQ_WRITE	707	aio_write = EIO_WRITE
1180	PROTOTYPE: $$$$$;$	708	PROTOTYPE: $$$$$;$
1181	PPCODE:	709	PPCODE:
1182	{	710	{
1183	aio_req req;
1184	STRLEN svlen;	711	STRLEN svlen;
		712	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1185	char *svptr = SvPVbyte (data, svlen);	713	char *svptr = SvPVbyte (data, svlen);
1186		714	UV len = SvUV (length);
1187	SvUPGRADE (data, SVt_PV);
1188	SvPOK_on (data);
1189		715
1190	if (dataoffset < 0)	716	if (dataoffset < 0)
1191	dataoffset += svlen;	717	dataoffset += svlen;
1192		718
1193	if (dataoffset < 0 || dataoffset > svlen)	719	if (dataoffset < 0 || dataoffset > svlen)
1194	croak ("data offset outside of string");	720	croak ("dataoffset outside of data scalar");
1195		721
1196	if (ix == REQ_WRITE)	722	if (ix == EIO_WRITE)
1197	{	723	{
1198	/* write: check length and adjust. */	724	/* write: check length and adjust. */
1199	if (length < 0 || length + dataoffset > svlen)	725	if (!SvOK (length) || len + dataoffset > svlen)
1200	length = svlen - dataoffset;	726	len = svlen - dataoffset;
1201	}	727	}
1202	else	728	else
1203	{	729	{
1204	/* read: grow scalar as necessary */	730	/* read: check type and grow scalar as necessary */
		731	SvUPGRADE (data, SVt_PV);
1205	svptr = SvGROW (data, length + dataoffset);	732	svptr = SvGROW (data, len + dataoffset + 1);
1206	}	733	}
1207
1208	if (length < 0)
1209	croak ("length must not be negative");
1210		734
1211	{	735	{
1212	dREQ;	736	dREQ;
1213		737
1214	req->type = ix;	738	req->type = ix;
1215	req->fh = newSVsv (fh);	739	req->sv1 = newSVsv (fh);
1216	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	740	req->int1 = fd;
1217	: IoOFP (sv_2io (fh)));	741	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1218	req->offset = offset;	742	req->size = len;
1219	req->length = length;
1220	req->data = SvREFCNT_inc (data);	743	req->sv2 = SvREFCNT_inc (data);
1221	req->dataptr = (char *)svptr + dataoffset;	744	req->ptr2 = (char *)svptr + dataoffset;
		745	req->stroffset = dataoffset;
1222		746
1223	if (!SvREADONLY (data))	747	if (!SvREADONLY (data))
1224	{	748	{
1225	SvREADONLY_on (data);	749	SvREADONLY_on (data);
1226	req->data2ptr = (void *)data;	750	req->flags |= FLAG_SV2_RO_OFF;
1227	}	751	}
1228		752
1229	REQ_SEND;	753	REQ_SEND;
1230	}	754	}
1231	}	755	}
1232		756
1233	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
1234	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)
1235	SV * out_fh
1236	SV * in_fh
1237	UV in_offset
1238	UV length
1239	SV * callback
1240	PROTOTYPE: $$$$;$	774	PROTOTYPE: $$$$;$
1241	PPCODE:	775	PPCODE:
1242	{	776	{
		777	int ifd = s_fileno_croak (in_fh , 0);
		778	int ofd = s_fileno_croak (out_fh, 1);
1243	dREQ;	779	dREQ;
1244		780
1245	req->type = REQ_SENDFILE;	781	req->type = EIO_SENDFILE;
1246	req->fh = newSVsv (out_fh);	782	req->sv1 = newSVsv (out_fh);
1247	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	783	req->int1 = ofd;
1248	req->fh2 = newSVsv (in_fh);	784	req->sv2 = newSVsv (in_fh);
1249	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	785	req->int2 = ifd;
1250	req->offset = in_offset;	786	req->offs = in_offset;
1251	req->length = length;	787	req->size = length;
1252		788
1253	REQ_SEND;	789	REQ_SEND;
1254	}	790	}
1255		791
1256	void	792	void
1257	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	793	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1258	SV * fh
1259	UV offset
1260	IV length
1261	SV * callback
1262	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
1263	PPCODE:	795	PPCODE:
1264	{	796	{
		797	int fd = s_fileno_croak (fh, 0);
1265	dREQ;	798	dREQ;
1266		799
1267	req->type = REQ_READAHEAD;	800	req->type = EIO_READAHEAD;
1268	req->fh = newSVsv (fh);	801	req->sv1 = newSVsv (fh);
1269	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	802	req->int1 = fd;
1270	req->offset = offset;	803	req->offs = offset;
1271	req->length = length;	804	req->size = length;
1272		805
1273	REQ_SEND;	806	REQ_SEND;
1274	}	807	}
1275		808
1276	void	809	void
1277	aio_stat (fh_or_path,callback=&PL_sv_undef)	810	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1278	SV * fh_or_path
1279	SV * callback
1280	ALIAS:	811	ALIAS:
1281	aio_stat = REQ_STAT	812	aio_stat = EIO_STAT
1282	aio_lstat = REQ_LSTAT	813	aio_lstat = EIO_LSTAT
1283	PPCODE:	814	PPCODE:
1284	{	815	{
1285	dREQ;	816	dREQ;
1286		817
1287	New (0, req->statdata, 1, Stat_t);	818	req->sv1 = newSVsv (fh_or_path);
1288	if (!req->statdata)
1289	{
1290	req_free (req);
1291	croak ("out of memory during aio_req->statdata allocation");
1292	}
1293		819
1294	if (SvPOK (fh_or_path))	820	if (SvPOK (req->sv1))
1295	{	821	{
1296	req->type = ix;	822	req->type = ix;
1297	req->data = newSVsv (fh_or_path);
1298	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1299	}	824	}
1300	else	825	else
1301	{	826	{
1302	req->type = REQ_FSTAT;	827	req->type = EIO_FSTAT;
1303	req->fh = newSVsv (fh_or_path);
1304	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1305	}	829	}
1306		830
1307	REQ_SEND;	831	REQ_SEND;
1308	}	832	}
1309		833
1310	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
1311	aio_unlink (pathname,callback=&PL_sv_undef)	949	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1312	SV * pathname
1313	SV * callback
1314	ALIAS:	950	ALIAS:
1315	aio_unlink = REQ_UNLINK	951	aio_unlink = EIO_UNLINK
1316	aio_rmdir = REQ_RMDIR	952	aio_rmdir = EIO_RMDIR
1317	aio_readdir = REQ_READDIR	953	aio_readdir = EIO_READDIR
1318	PPCODE:	954	PPCODE:
1319	{	955	{
1320	dREQ;	956	dREQ;
1321		957
1322	req->type = ix;	958	req->type = ix;
1323	req->data = newSVsv (pathname);	959	req->sv1 = newSVsv (pathname);
1324	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);
1325		980
1326	REQ_SEND;	981	REQ_SEND;
1327	}	982	}
1328		983
1329	void	984	void
1330	aio_link (oldpath,newpath,callback=&PL_sv_undef)	985	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1331	SV * oldpath
1332	SV * newpath
1333	SV * callback
1334	ALIAS:
1335	aio_link = REQ_LINK
1336	aio_symlink = REQ_SYMLINK
1337	aio_rename = REQ_RENAME
1338	PPCODE:	986	PPCODE:
1339	{	987	{
1340	dREQ;	988	dREQ;
1341		989
1342	req->type = ix;	990	req->type = EIO_MKNOD;
1343	req->fh = newSVsv (oldpath);	991	req->sv1 = newSVsv (pathname);
1344	req->data2ptr = SvPVbyte_nolen (req->fh);	992	req->ptr1 = SvPVbyte_nolen (req->sv1);
1345	req->data = newSVsv (newpath);	993	req->int2 = (mode_t)mode;
1346	req->dataptr = SvPVbyte_nolen (req->data);	994	req->offs = dev;
1347		995
1348	REQ_SEND;	996	REQ_SEND;
1349	}	997	}
1350		998
1351	void	999	void
1352	aio_busy (delay,callback=&PL_sv_undef)	1000	aio_busy (double delay, SV *callback=&PL_sv_undef)
1353	double delay
1354	SV * callback
1355	PPCODE:	1001	PPCODE:
1356	{	1002	{
1357	dREQ;	1003	dREQ;
1358		1004
1359	req->type = REQ_BUSY;	1005	req->type = EIO_BUSY;
1360	req->fd = delay < 0. ? 0 : delay;	1006	req->nv1 = delay < 0. ? 0. : delay;
1361	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1362		1007
1363	REQ_SEND;	1008	REQ_SEND;
1364	}	1009	}
1365		1010
1366	void	1011	void
1367	aio_group (callback=&PL_sv_undef)	1012	aio_group (SV *callback=&PL_sv_undef)
1368	SV * callback
1369	PROTOTYPE: ;$	1013	PROTOTYPE: ;$
1370	PPCODE:	1014	PPCODE:
1371	{	1015	{
1372	dREQ;	1016	dREQ;
1373		1017
1374	req->type = REQ_GROUP;	1018	req->type = EIO_GROUP;
		1019
1375	req_send (req);	1020	req_submit (req);
1376
1377	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1021	XPUSHs (req_sv (req, aio_grp_stash));
1378	}	1022	}
1379		1023
1380	void	1024	void
1381	aio_nop (callback=&PL_sv_undef)	1025	aio_nop (SV *callback=&PL_sv_undef)
1382	SV * callback	1026	ALIAS:
		1027	aio_nop = EIO_NOP
		1028	aio_sync = EIO_SYNC
1383	PPCODE:	1029	PPCODE:
1384	{	1030	{
1385	dREQ;	1031	dREQ;
1386		1032
1387	req->type = REQ_NOP;	1033	req->type = ix;
1388		1034
1389	REQ_SEND;	1035	REQ_SEND;
1390	}	1036	}
1391		1037
1392	void	1038	int
1393	aioreq_pri (int pri = DEFAULT_PRI)	1039	aioreq_pri (int pri = 0)
1394	CODE:	1040	PROTOTYPE: ;$
		1041	CODE:
		1042	RETVAL = next_pri;
		1043	if (items > 0)
		1044	{
1395	if (pri < PRI_MIN) pri = PRI_MIN;	1045	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1396	if (pri > PRI_MAX) pri = PRI_MAX;	1046	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1397	next_pri = pri + PRI_BIAS;	1047	next_pri = pri;
		1048	}
		1049	OUTPUT:
		1050	RETVAL
1398		1051
1399	void	1052	void
1400	aioreq_nice (int nice = 0)	1053	aioreq_nice (int nice = 0)
1401	CODE:	1054	CODE:
1402	nice = next_pri - nice;	1055	nice = next_pri - nice;
1403	if (nice < PRI_MIN) nice = PRI_MIN;	1056	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1404	if (nice > PRI_MAX) nice = PRI_MAX;	1057	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1405	next_pri = nice + PRI_BIAS;	1058	next_pri = nice;
1406		1059
1407	void	1060	void
1408	flush ()	1061	flush ()
1409	PROTOTYPE:	1062	PROTOTYPE:
1410	CODE:	1063	CODE:
1411	while (nreqs)	1064	while (eio_nreqs ())
1412	{	1065	{
1413	poll_wait ();	1066	poll_wait ();
1414	poll_cb ();	1067	poll_cb ();
1415	}	1068	}
1416		1069
1417	void	1070	int
1418	poll()	1071	poll()
1419	PROTOTYPE:	1072	PROTOTYPE:
1420	CODE:	1073	CODE:
1421	if (nreqs)
1422	{
1423	poll_wait ();	1074	poll_wait ();
1424	poll_cb ();	1075	RETVAL = poll_cb ();
1425	}	1076	OUTPUT:
		1077	RETVAL
1426		1078
1427	int	1079	int
1428	poll_fileno()	1080	poll_fileno()
1429	PROTOTYPE:	1081	PROTOTYPE:
1430	CODE:	1082	CODE:
1431	RETVAL = respipe [0];	1083	RETVAL = s_epipe_fd (&respipe);
1432	OUTPUT:	1084	OUTPUT:
1433	RETVAL	1085	RETVAL
1434		1086
1435	int	1087	int
1436	poll_cb(...)	1088	poll_cb(...)
…		…
1442		1094
1443	void	1095	void
1444	poll_wait()	1096	poll_wait()
1445	PROTOTYPE:	1097	PROTOTYPE:
1446	CODE:	1098	CODE:
1447	if (nreqs)
1448	poll_wait ();	1099	poll_wait ();
1449		1100
1450	int	1101	int
1451	nreqs()	1102	nreqs()
1452	PROTOTYPE:	1103	PROTOTYPE:
1453	CODE:	1104	CODE:
1454	RETVAL = nreqs;	1105	RETVAL = eio_nreqs ();
1455	OUTPUT:	1106	OUTPUT:
1456	RETVAL	1107	RETVAL
1457		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
1458	PROTOTYPES: DISABLE	1158	PROTOTYPES: DISABLE
1459		1159
1460	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1160	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1461		1161
1462	void	1162	void
1463	cancel (aio_req_ornot req)	1163	cancel (aio_req_ornot req)
1464	CODE:	1164	CODE:
1465	req_cancel (req);	1165	eio_cancel (req);
1466		1166
1467	void	1167	void
1468	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1168	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1469	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
1470	SvREFCNT_dec (req->callback);	1178	SvREFCNT_dec (req->callback);
1471	req->callback = newSVsv (callback);	1179	req->callback = SvREFCNT_inc (cb_cv);
		1180	}
		1181	}
1472		1182
1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1183	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1474		1184
1475	void	1185	void
1476	add (aio_req grp, ...)	1186	add (aio_req grp, ...)
1477	PPCODE:	1187	PPCODE:
1478	{	1188	{
1479	int i;	1189	int i;
1480	aio_req req;
1481		1190
1482	if (grp->fd == 2)	1191	if (grp->int1 == 2)
1483	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");
1484		1193
1485	for (i = 1; i < items; ++i )	1194	for (i = 1; i < items; ++i )
1486	{	1195	{
		1196	aio_req req;
		1197
1487	if (GIMME_V != G_VOID)	1198	if (GIMME_V != G_VOID)
1488	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1199	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1489		1200
1490	req = SvAIO_REQ (ST (i));	1201	req = SvAIO_REQ (ST (i));
1491		1202
1492	if (req)	1203	if (req)
1493	{	1204	eio_grp_add (grp, req);
1494	++grp->length;
1495	req->grp = grp;
1496
1497	req->grp_prev = 0;
1498	req->grp_next = grp->grp_first;
1499
1500	if (grp->grp_first)
1501	grp->grp_first->grp_prev = req;
1502
1503	grp->grp_first = req;
1504	}
1505	}	1205	}
1506	}	1206	}
1507		1207
1508	void	1208	void
1509	cancel_subs (aio_req_ornot req)	1209	cancel_subs (aio_req_ornot req)
…		…
1513	void	1213	void
1514	result (aio_req grp, ...)	1214	result (aio_req grp, ...)
1515	CODE:	1215	CODE:
1516	{	1216	{
1517	int i;	1217	int i;
		1218	AV *av;
		1219
		1220	grp->errorno = errno;
		1221
1518	AV *av = newAV ();	1222	av = newAV ();
		1223	av_extend (av, items - 1);
1519		1224
1520	for (i = 1; i < items; ++i )	1225	for (i = 1; i < items; ++i )
1521	av_push (av, newSVsv (ST (i)));	1226	av_push (av, newSVsv (ST (i)));
1522		1227
1523	SvREFCNT_dec (grp->data);	1228	SvREFCNT_dec (grp->sv1);
1524	grp->data = (SV *)av;	1229	grp->sv1 = (SV *)av;
1525	}	1230	}
		1231
		1232	void
		1233	errno (aio_req grp, int errorno = errno)
		1234	CODE:
		1235	grp->errorno = errorno;
1526		1236
1527	void	1237	void
1528	limit (aio_req grp, int limit)	1238	limit (aio_req grp, int limit)
1529	CODE:	1239	CODE:
1530	grp->fd2 = limit;	1240	eio_grp_limit (grp, limit);
1531	aio_grp_feed (grp);
1532		1241
1533	void	1242	void
1534	feed (aio_req grp, SV *callback=&PL_sv_undef)	1243	feed (aio_req grp, SV *callback=&PL_sv_undef)
1535	CODE:	1244	CODE:
1536	{	1245	{
1537	SvREFCNT_dec (grp->fh2);	1246	SvREFCNT_dec (grp->sv2);
1538	grp->fh2 = newSVsv (callback);	1247	grp->sv2 = newSVsv (callback);
		1248	grp->feed = aio_grp_feed;
1539		1249
1540	if (grp->fd2 <= 0)	1250	if (grp->int2 <= 0)
1541	grp->fd2 = 2;	1251	grp->int2 = 2;
1542		1252
1543	aio_grp_feed (grp);	1253	eio_grp_limit (grp, grp->int2);
1544	}	1254	}
1545		1255

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