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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.84 by root, Sat Oct 28 01:24:19 2006 UTC vs.
Revision 1.156 by root, Thu Nov 12 00:01:52 2009 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	/* perl namespace pollution */
34	# if __linux	21	#undef VERSION
35	# include <sys/sendfile.h>	22
36	# elif __freebsd	23	#ifdef _WIN32
37	# include <sys/socket.h>	24
38	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	26	# undef malloc
40	# include <sys/socket.h>	27	# undef free
41	# elif __solaris /* not yet */	28
42	# 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
43	# else	61	#else
44	# error sendfile support requested but not available	62
45	# 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
46	#endif	70	#endif
47		71
48	/* number of seconds after which idle threads exit */	72	/* perl stupidly overrides readdir and maybe others */
49	#define IDLE_TIMEOUT 10	73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
50		77
51	/* used for struct dirent, AIX doesn't provide it */	78	#define EIO_STRUCT_STAT Stat_t
52	#ifndef NAME_MAX	79
53	# define NAME_MAX 4096	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
54	#endif	89	#endif
55		90
56	#ifndef PTHREAD_STACK_MIN	91	/*****************************************************************************/
57	/* care for broken platforms, e.g. windows */	92
58	# 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)
59	#endif	97	#endif
60		98
61	#if __ia64	99	#define expect_false(expr) expect ((expr) != 0, 0)
62	# define STACKSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	101
64	# define STACKSIZE PTHREAD_STACK_MIN	102	/*****************************************************************************/
65	#else	103
66	# 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
67	#endif	123	#endif
68		124
69	/* wether word reads are potentially non-atomic.	125	#ifndef POSIX_FADV_SEQUENTIAL
70	* this is conservatice, likely most arches this runs	126	# define POSIX_FADV_SEQUENTIAL 0
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDREAD_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDREAD_UNSAFE 0
76	# else
77	# define WORDREAD_UNSAFE 1
78	# endif
79	#endif	127	#endif
80		128
81	/* buffer size for various temporary buffers */	129	#ifndef POSIX_FADV_RANDOM
82	#define AIO_BUFSIZE 65536	130	# define POSIX_FADV_RANDOM 0
		131	#endif
83		132
84	#define dBUF \	133	#ifndef POSIX_FADV_NOREUSE
85	char *aio_buf; \	134	# define POSIX_FADV_NOREUSE 0
86	LOCK (wrklock); \	135	#endif
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	136
88	UNLOCK (wrklock); \	137	#ifndef POSIX_FADV_WILLNEED
89	if (!aio_buf) \	138	# define POSIX_FADV_WILLNEED 0
90	return -1;	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)
91		149
92	enum {	150	enum {
93	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	152	};
105		153
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		155
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;
114	SV *fh, *fh2;
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;
122	int type;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	};
137
138	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
140		158
141	enum {	159	static SV *on_next_submit;
142	PRI_MIN = -4,	160	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	161	static int max_outstanding;
144		162
145	DEFAULT_PRI = 0,	163	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		164
150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
151
152	static unsigned int started, idle, wanted;
153
154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156	#else
157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158	#endif
159
160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163	/* worker threads management */
164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166	typedef struct worker {
167	/* locked by wrklock */
168	struct worker *prev, *next;
169
170	pthread_t tid;
171
172	/* locked by reslock, reqlock or wrklock */
173	aio_req req; /* currently processed request */
174	void *dbuf;
175	DIR *dirp;
176	} worker;
177
178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180	static void worker_clear (worker *wrk)
181	{
182	if (wrk->dirp)
183	{
184	closedir (wrk->dirp);
185	wrk->dirp = 0;
186	}
187
188	if (wrk->dbuf)
189	{
190	free (wrk->dbuf);
191	wrk->dbuf = 0;
192	}
193	}
194
195	static void worker_free (worker *wrk)
196	{
197	wrk->next->prev = wrk->prev;
198	wrk->prev->next = wrk->next;
199
200	free (wrk);
201	}
202
203	static volatile unsigned int nreqs, nready, npending;
204	static volatile unsigned int max_idle = 4;
205	static volatile unsigned int max_outstanding = 0xffffffff;
206	static int respipe [2];
207
208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
211
212	#if WORDREAD_UNSAFE
213
214	static unsigned int get_nready ()
215	{
216	unsigned int retval;
217
218	LOCK (reqlock);
219	retval = nready;
220	UNLOCK (reqlock);
221
222	return retval;
223	}
224
225	static unsigned int get_npending ()
226	{
227	unsigned int retval;
228
229	LOCK (reslock);
230	retval = npending;
231	UNLOCK (reslock);
232
233	return retval;
234	}
235
236	#else
237
238	# define get_nready() nready
239	# define get_npending() npending
240
241	#endif
242
243	/*
244	* a somewhat faster data structure might be nice, but
245	* with 8 priorities this actually needs <20 insns
246	* per shift, the most expensive operation.
247	*/
248	typedef struct {
249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
250	int size;
251	} reqq;
252
253	static reqq req_queue;
254	static reqq res_queue;
255
256	int reqq_push (reqq *q, aio_req req)
257	{
258	int pri = req->pri;
259	req->next = 0;
260
261	if (q->qe[pri])
262	{
263	q->qe[pri]->next = req;
264	q->qe[pri] = req;
265	}
266	else
267	q->qe[pri] = q->qs[pri] = req;
268
269	return q->size++;
270	}
271
272	aio_req reqq_shift (reqq *q)
273	{
274	int pri;
275
276	if (!q->size)
277	return 0;
278
279	--q->size;
280
281	for (pri = NUM_PRI; pri--; )
282	{
283	aio_req req = q->qs[pri];
284
285	if (req)
286	{
287	if (!(q->qs[pri] = req->next))
288	q->qe[pri] = 0;
289
290	return req;
291	}
292	}
293
294	abort ();
295	}
296
297	static int poll_cb (int max);
298	static void req_invoke (aio_req req);
299	static void req_free (aio_req req);	165	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	166	static void req_cancel (aio_req req);
301		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
302	/* must be called at most once */	180	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
304	{	182	{
305	if (!req->self)	183	if (!req->self)
306	{	184	{
307	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309	}	187	}
310		188
311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
312	}	190	}
313		191
314	static aio_req SvAIO_REQ (SV *sv)	192	static aio_req SvAIO_REQ (SV *sv)
315	{	193	{
316	MAGIC *mg;	194	MAGIC *mg;
317		195
318	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")))
319	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class IO::AIO::REQ expected");
320		201
321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322		203
323	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	205	}
325		206
326	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
327	{	208	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	209	if (grp->sv2 && SvOK (grp->sv2))
329	{	210	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	211	dSP;
335		212
336	ENTER;	213	ENTER;
337	SAVETMPS;	214	SAVETMPS;
338	PUSHMARK (SP);	215	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	XPUSHs (req_sv (grp, aio_grp_stash));
340	PUTBACK;	217	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	219	SPAGAIN;
343	FREETMPS;	220	FREETMPS;
344	LEAVE;	221	LEAVE;
345	}
346
347	/* stop if no progress has been made */
348	if (old_len == grp->length)
349	{
350	SvREFCNT_dec (grp->fh2);
351	grp->fh2 = 0;
352	break;
353	}
354	}	222	}
355	}	223	}
356		224
357	static void aio_grp_dec (aio_req grp)	225	static void req_submit (eio_req *req)
358	{	226	{
359	--grp->length;	227	eio_submit (req);
360		228
361	/* call feeder, if applicable */	229	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	230	{
367	req_invoke (grp);	231	dSP;
368	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);
369	}	239	}
370	}	240	}
371		241
372	static void req_invoke (aio_req req)	242	static int req_invoke (eio_req *req)
373	{	243	{
374	dSP;	244	dSP;
375		245
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
377	{	250	{
378	ENTER;	251	ENTER;
379	SAVETMPS;	252	SAVETMPS;
380	PUSHMARK (SP);	253	PUSHMARK (SP);
381	EXTEND (SP, 1);	254	EXTEND (SP, 1);
382		255
383	switch (req->type)	256	switch (req->type)
384	{	257	{
385	case REQ_READDIR:	258	case EIO_READDIR:
386	{	259	{
387	SV *rv = &PL_sv_undef;	260	SV *rv = &PL_sv_undef;
388		261
389	if (req->result >= 0)	262	if (req->result >= 0)
390	{	263	{
391	int i;	264	int i;
392	char *buf = req->data2ptr;	265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	267	AV *av = newAV ();
394		268
395	av_extend (av, req->result - 1);	269	av_extend (av, req->result - 1);
396		270
397	for (i = 0; i < req->result; ++i)	271	for (i = 0; i < req->result; ++i)
398	{	272	{
399	SV *sv = newSVpv (buf, 0);	273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		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
401	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);
402	buf += SvCUR (sv) + 1;	305	names += SvCUR (name) + 1;
		306	}
403	}	307	}
404		308
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	309	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	310	}
407		311
408	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))));
409	}	316	}
410	break;	317	break;
411		318
412	case REQ_OPEN:	319	case EIO_OPEN:
413	{	320	{
414	/* convert fd to fh */	321	/* convert fd to fh */
415	SV *fh;	322	SV *fh = &PL_sv_undef;
416		323
417	PUSHs (sv_2mortal (newSViv (req->result)));	324	if (req->result >= 0)
418	PUTBACK;	325	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	326	GV *gv = (GV *)sv_newmortal ();
420	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);
421		333
422	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	);
423		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
424	PUSHMARK (SP);	346	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	347	}
427	break;	348	break;
428		349
429	case REQ_GROUP:	350	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	351	req->int1 = 2; /* mark group as finished */
431		352
432	if (req->data)	353	if (req->sv1)
433	{	354	{
434	int i;	355	int i;
435	AV *av = (AV *)req->data;	356	AV *av = (AV *)req->sv1;
436		357
437	EXTEND (SP, AvFILL (av) + 1);	358	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	359	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	360	PUSHs (*av_fetch (av, i, 0));
440	}	361	}
441	break;	362	break;
442		363
443	case REQ_NOP:	364	case EIO_NOP:
444	case REQ_BUSY:	365	case EIO_BUSY:
445	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 */
446		396
447	default:	397	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	398	PUSHs (sv_2mortal (newSViv (req->result)));
449	break;	399	break;
450	}	400	}
451		401
452	errno = req->errorno;	402	errno = req->errorno;
453		403
454	PUTBACK;	404	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	406	SPAGAIN;
457		407
458	FREETMPS;	408	FREETMPS;
459	LEAVE;	409	LEAVE;
		410
		411	PUTBACK;
460	}	412	}
461		413
462	if (req->grp)	414	return !!SvTRUE (ERRSV);
463	{
464	aio_req grp = req->grp;
465
466	/* unlink request */
467	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
469
470	if (grp->grp_first == req)
471	grp->grp_first = req->grp_next;
472
473	aio_grp_dec (grp);
474	}
475
476	if (SvTRUE (ERRSV))
477	{
478	req_free (req);
479	croak (0);
480	}
481	}	415	}
482		416
483	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
484	{	418	{
485	if (req->self)	419	if (req->self)
486	{	420	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
489	}	423	}
490		424
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
494	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499		428
500	Safefree (req);	429	Safefree (req);
501	}	430	}
502		431
503	static void req_cancel_subs (aio_req grp)	432	static void req_cancel_subs (aio_req grp)
504	{	433	{
505	aio_req sub;	434	aio_req sub;
506		435
507	if (grp->type != REQ_GROUP)	436	if (grp->type != EIO_GROUP)
508	return;	437	return;
509		438
510	SvREFCNT_dec (grp->fh2);	439	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	440	grp->sv2 = 0;
512		441
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	442	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	443	}
516		444
517	static void req_cancel (aio_req req)	445	static void
		446	create_respipe (void)
518	{	447	{
519	req->flags |= FLAG_CANCELLED;	448	if (s_epipe_renew (&respipe))
520		449	croak ("IO::AIO: unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	450	}
523		451
524	static void *aio_proc(void *arg);
525
526	static void start_thread (void)
527	{
528	sigset_t fullsigset, oldsigset;
529	pthread_attr_t attr;
530
531	worker *wrk = calloc (1, sizeof (worker));
532
533	if (!wrk)
534	croak ("unable to allocate worker thread data");
535
536	pthread_attr_init (&attr);
537	pthread_attr_setstacksize (&attr, STACKSIZE);
538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
539	#ifdef PTHREAD_SCOPE_PROCESS
540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
541	#endif
542
543	sigfillset (&fullsigset);
544
545	LOCK (wrklock);
546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
547
548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
549	{
550	wrk->prev = &wrk_first;
551	wrk->next = wrk_first.next;
552	wrk_first.next->prev = wrk;
553	wrk_first.next = wrk;
554	++started;
555	}
556	else
557	free (wrk);
558
559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
560	UNLOCK (wrklock);
561	}
562
563	static void maybe_start_thread ()
564	{
565	if (started >= wanted)
566	return;
567
568	/* todo: maybe use idle here, but might be less exact */
569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
570	return;
571
572	start_thread ();
573	}
574
575	static void req_send (aio_req req)
576	{
577	++nreqs;
578
579	LOCK (reqlock);
580	++nready;
581	reqq_push (&req_queue, req);
582	pthread_cond_signal (&reqwait);
583	UNLOCK (reqlock);
584
585	maybe_start_thread ();
586	}
587
588	static void end_thread (void)
589	{
590	aio_req req;
591
592	Newz (0, req, 1, aio_cb);
593
594	req->type = REQ_QUIT;
595	req->pri = PRI_MAX + PRI_BIAS;
596
597	LOCK (reqlock);
598	reqq_push (&req_queue, req);
599	pthread_cond_signal (&reqwait);
600	UNLOCK (reqlock);
601
602	LOCK (wrklock);
603	--started;
604	UNLOCK (wrklock);
605	}
606
607	static void min_parallel (int nthreads)
608	{
609	if (wanted < nthreads)
610	wanted = nthreads;
611	}
612
613	static void max_parallel (int nthreads)
614	{
615	if (wanted > nthreads)
616	wanted = nthreads;
617
618	while (started > wanted)
619	end_thread ();
620	}
621
622	static void poll_wait ()	452	static void poll_wait (void)
623	{	453	{
624	fd_set rfd;
625
626	while (nreqs)	454	while (eio_nreqs ())
627	{	455	{
628	int size;	456	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	457
		458	X_LOCK (reslock);
630	size = res_queue.size;	459	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	460	X_UNLOCK (reslock);
632		461
633	if (size)	462	if (size)
634	return;	463	return;
635		464
636	maybe_start_thread ();	465	etp_maybe_start_thread ();
637		466
638	FD_ZERO(&rfd);	467	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	468	}
643	}	469	}
644		470
645	static int poll_cb (int max)	471	static int poll_cb (void)
646	{	472	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	473	for (;;)
653	{	474	{
654	while (max <= 0 || count < max)	475	int res = eio_poll ();
655	{
656	maybe_start_thread ();
657		476
658	LOCK (reslock);	477	if (res > 0)
659	req = reqq_shift (&res_queue);
660
661	if (req)
662	{
663	--npending;
664
665	if (!res_queue.size)
666	{
667	/* read any signals sent by the worker threads */
668	char buf [32];
669	while (read (respipe [0], buf, 32) == 32)
670	;
671	}
672	}
673
674	UNLOCK (reslock);
675
676	if (!req)
677	break;
678
679	--nreqs;
680
681	if (req->type == REQ_GROUP && req->length)
682	{
683	req->fd = 1; /* mark request as delayed */
684	continue;
685	}
686	else
687	{
688	if (req->type == REQ_READ)
689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
690
691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
692	SvREADONLY_off (req->data);
693
694	if (req->statdata)
695	{
696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
697	PL_laststatval = req->result;
698	PL_statcache = *(req->statdata);
699	}
700
701	req_invoke (req);
702
703	count++;
704	}
705
706	req_free (req);
707	}
708
709	if (nreqs <= max_outstanding)
710	break;	478	croak (0);
		479
		480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
711		482
712	poll_wait ();	483	poll_wait ();
713
714	max = 0;
715	}	484	}
716
717	return count;
718	}
719
720	static void create_pipe ()
721	{
722	if (pipe (respipe))
723	croak ("unable to initialize result pipe");
724
725	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
726	croak ("cannot set result pipe to nonblocking mode");
727
728	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
729	croak ("cannot set result pipe to nonblocking mode");
730	}
731
732	/*****************************************************************************/
733	/* work around various missing functions */
734
735	#if !HAVE_PREADWRITE
736	# define pread aio_pread
737	# define pwrite aio_pwrite
738
739	/*
740	* make our pread/pwrite safe against themselves, but not against
741	* normal read/write by using a mutex. slows down execution a lot,
742	* but that's your problem, not mine.
743	*/
744	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
745
746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
747	{
748	ssize_t res;
749	off_t ooffset;
750
751	LOCK (preadwritelock);
752	ooffset = lseek (fd, 0, SEEK_CUR);
753	lseek (fd, offset, SEEK_SET);
754	res = read (fd, buf, count);
755	lseek (fd, ooffset, SEEK_SET);
756	UNLOCK (preadwritelock);
757
758	return res;
759	}
760
761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = write (fd, buf, count);
770	lseek (fd, offset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775	#endif
776
777	#if !HAVE_FDATASYNC
778	# define fdatasync fsync
779	#endif
780
781	#if !HAVE_READAHEAD
782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
783
784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
785	{
786	dBUF;
787
788	while (count > 0)
789	{
790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
791
792	pread (fd, aio_buf, len, offset);
793	offset += len;
794	count -= len;
795	}
796
797	errno = 0;
798	}
799
800	#endif
801
802	#if !HAVE_READDIR_R
803	# define readdir_r aio_readdir_r
804
805	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
806
807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
808	{
809	struct dirent *e;
810	int errorno;
811
812	LOCK (readdirlock);
813
814	e = readdir (dirp);
815	errorno = errno;
816
817	if (e)
818	{
819	*res = ent;
820	strcpy (ent->d_name, e->d_name);
821	}
822	else
823	*res = 0;
824
825	UNLOCK (readdirlock);
826
827	errno = errorno;
828	return e ? 0 : -1;
829	}
830	#endif
831
832	/* sendfile always needs emulation */
833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
834	{
835	ssize_t res;
836
837	if (!count)
838	return 0;
839
840	#if HAVE_SENDFILE
841	# if __linux
842	res = sendfile (ofd, ifd, &offset, count);
843
844	# elif __freebsd
845	/*
846	* Of course, the freebsd sendfile is a dire hack with no thoughts
847	* wasted on making it similar to other I/O functions.
848	*/
849	{
850	off_t sbytes;
851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853	if (res < 0 && sbytes)
854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855	res = sbytes;
856	}
857
858	# elif __hpux
859	res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861	# elif __solaris
862	{
863	struct sendfilevec vec;
864	size_t sbytes;
865
866	vec.sfv_fd = ifd;
867	vec.sfv_flag = 0;
868	vec.sfv_off = offset;
869	vec.sfv_len = count;
870
871	res = sendfilev (ofd, &vec, 1, &sbytes);
872
873	if (res < 0 && sbytes)
874	res = sbytes;
875	}
876
877	# endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882
883	if (res < 0
884	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885	#if __solaris
886	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
887	#endif
888	)
889	)
890	{
891	/* emulate sendfile. this is a major pain in the ass */
892	dBUF;
893
894	res = 0;
895
896	while (count)
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901
902	if (cnt <= 0)
903	{
904	if (cnt && !res) res = -1;
905	break;
906	}
907
908	cnt = write (ofd, aio_buf, cnt);
909
910	if (cnt <= 0)
911	{
912	if (cnt && !res) res = -1;
913	break;
914	}
915
916	offset += cnt;
917	res += cnt;
918	count -= cnt;
919	}
920	}
921
922	return res;
923	}
924
925	/* read a full directory */
926	static void scandir_ (aio_req req, worker *self)
927	{
928	DIR *dirp;
929	union
930	{
931	struct dirent d;
932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
933	} *u;
934	struct dirent *entp;
935	char *name, *names;
936	int memlen = 4096;
937	int memofs = 0;
938	int res = 0;
939	int errorno;
940
941	LOCK (wrklock);
942	self->dirp = dirp = opendir (req->dataptr);
943	self->dbuf = u = malloc (sizeof (*u));
944	req->data2ptr = names = malloc (memlen);
945	UNLOCK (wrklock);
946
947	if (dirp && u && names)
948	for (;;)
949	{
950	errno = 0;
951	readdir_r (dirp, &u->d, &entp);
952
953	if (!entp)
954	break;
955
956	name = entp->d_name;
957
958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
959	{
960	int len = strlen (name) + 1;
961
962	res++;
963
964	while (memofs + len > memlen)
965	{
966	memlen *= 2;
967	LOCK (wrklock);
968	req->data2ptr = names = realloc (names, memlen);
969	UNLOCK (wrklock);
970
971	if (!names)
972	break;
973	}
974
975	memcpy (names + memofs, name, len);
976	memofs += len;
977	}
978	}
979
980	if (errno)
981	res = -1;
982
983	req->result = res;
984	}
985
986	/*****************************************************************************/
987
988	static void *aio_proc (void *thr_arg)
989	{
990	aio_req req;
991	struct timespec ts;
992	worker *self = (worker *)thr_arg;
993
994	/* try to distribute timeouts somewhat evenly */
995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
996	* (1000000000UL / 1024UL);
997
998	for (;;)
999	{
1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1001
1002	LOCK (reqlock);
1003
1004	for (;;)
1005	{
1006	self->req = req = reqq_shift (&req_queue);
1007
1008	if (req)
1009	break;
1010
1011	++idle;
1012
1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1014	== ETIMEDOUT)
1015	{
1016	if (idle > max_idle)
1017	{
1018	--idle;
1019	UNLOCK (reqlock);
1020	LOCK (wrklock);
1021	--started;
1022	UNLOCK (wrklock);
1023	goto quit;
1024	}
1025
1026	/* we are allowed to idle, so do so without any timeout */
1027	pthread_cond_wait (&reqwait, &reqlock);
1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1029	}
1030
1031	--idle;
1032	}
1033
1034	--nready;
1035
1036	UNLOCK (reqlock);
1037
1038	errno = 0; /* strictly unnecessary */
1039
1040	if (!(req->flags & FLAG_CANCELLED))
1041	switch (req->type)
1042	{
1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1045
1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1048
1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1052
1053	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1054	case REQ_CLOSE: req->result = close (req->fd); break;
1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1061
1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
1064	case REQ_READDIR: scandir_ (req, self); break;
1065
1066	case REQ_BUSY:
1067	{
1068	struct timeval tv;
1069
1070	tv.tv_sec = req->fd;
1071	tv.tv_usec = req->fd2;
1072
1073	req->result = select (0, 0, 0, 0, &tv);
1074	}
1075
1076	case REQ_GROUP:
1077	case REQ_NOP:
1078	break;
1079
1080	case REQ_QUIT:
1081	goto quit;
1082
1083	default:
1084	req->result = ENOSYS;
1085	break;
1086	}
1087
1088	req->errorno = errno;
1089
1090	LOCK (reslock);
1091
1092	++npending;
1093
1094	if (!reqq_push (&res_queue, req))
1095	/* write a dummy byte to the pipe so fh becomes ready */
1096	write (respipe [1], &respipe, 1);
1097
1098	self->req = 0;
1099	worker_clear (self);
1100
1101	UNLOCK (reslock);
1102	}
1103
1104	quit:
1105	LOCK (wrklock);
1106	worker_free (self);
1107	UNLOCK (wrklock);
1108
1109	return 0;
1110	}
1111
1112	/*****************************************************************************/
1113
1114	static void atfork_prepare (void)
1115	{
1116	LOCK (wrklock);
1117	LOCK (reqlock);
1118	LOCK (reslock);
1119	#if !HAVE_PREADWRITE
1120	LOCK (preadwritelock);
1121	#endif
1122	#if !HAVE_READDIR_R
1123	LOCK (readdirlock);
1124	#endif
1125	}
1126
1127	static void atfork_parent (void)
1128	{
1129	#if !HAVE_READDIR_R
1130	UNLOCK (readdirlock);
1131	#endif
1132	#if !HAVE_PREADWRITE
1133	UNLOCK (preadwritelock);
1134	#endif
1135	UNLOCK (reslock);
1136	UNLOCK (reqlock);
1137	UNLOCK (wrklock);
1138	}	485	}
1139		486
1140	static void atfork_child (void)	487	static void atfork_child (void)
1141	{	488	{
1142	aio_req prv;
1143
1144	while (prv = reqq_shift (&req_queue))
1145	req_free (prv);
1146
1147	while (prv = reqq_shift (&res_queue))
1148	req_free (prv);
1149
1150	while (wrk_first.next != &wrk_first)
1151	{
1152	worker *wrk = wrk_first.next;
1153
1154	if (wrk->req)
1155	req_free (wrk->req);
1156
1157	worker_clear (wrk);
1158	worker_free (wrk);
1159	}
1160
1161	started = 0;
1162	idle = 0;
1163	nreqs = 0;
1164	nready = 0;
1165	npending = 0;
1166
1167	close (respipe [0]);
1168	close (respipe [1]);
1169	create_pipe ();	489	create_respipe ();
		490	}
1170		491
1171	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;
1172	}	497	}
1173		498
1174	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
1175	aio_req req; \	501	aio_req req; \
1176	int req_pri = next_pri; \	502	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \	503	next_pri = EIO_PRI_DEFAULT; \
1178	\	504	\
1179	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
1180	croak ("callback must be undef or of reference type"); \
1181	\	506	\
1182	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
1183	if (!req) \	508	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
1185	\	510	\
1186	req->callback = newSVsv (callback); \	511	req->callback = SvREFCNT_inc (cb_cv); \
1187	req->pri = req_pri	512	req->pri = req_pri
1188		513
1189	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
1190	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
1191	\	518	\
1192	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
1194		521
1195	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
1196		523
1197	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
1198		525
1199	BOOT:	526	BOOT:
1200	{	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
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	570	aio_stash = gv_stashpv ("IO::AIO" , 1);
		571	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		572	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1202		573
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	574	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	575	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1209		576
1210	create_pipe ();	577	create_respipe ();
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	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);
1212	}	584	}
		585
		586	void
		587	max_poll_reqs (int nreqs)
		588	PROTOTYPE: $
		589	CODE:
		590	eio_set_max_poll_reqs (nreqs);
		591
		592	void
		593	max_poll_time (double nseconds)
		594	PROTOTYPE: $
		595	CODE:
		596	eio_set_max_poll_time (nseconds);
1213		597
1214	void	598	void
1215	min_parallel (int nthreads)	599	min_parallel (int nthreads)
1216	PROTOTYPE: $	600	PROTOTYPE: $
		601	CODE:
		602	eio_set_min_parallel (nthreads);
1217		603
1218	void	604	void
1219	max_parallel (int nthreads)	605	max_parallel (int nthreads)
1220	PROTOTYPE: $	606	PROTOTYPE: $
		607	CODE:
		608	eio_set_max_parallel (nthreads);
1221		609
1222	int	610	void
		611	max_idle (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_idle (nthreads);
		615
		616	void
1223	max_outstanding (int maxreqs)	617	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	618	PROTOTYPE: $
1225	CODE:	619	CODE:
1226	RETVAL = max_outstanding;
1227	max_outstanding = maxreqs;	620	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		621
1231	void	622	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	623	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1233	SV * pathname
1234	int flags
1235	int mode
1236	SV * callback
1237	PROTOTYPE: $$$;$	624	PROTOTYPE: $$$;$
1238	PPCODE:	625	PPCODE:
1239	{	626	{
1240	dREQ;	627	dREQ;
1241		628
1242	req->type = REQ_OPEN;	629	req->type = EIO_OPEN;
1243	req->data = newSVsv (pathname);	630	req->sv1 = newSVsv (pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);	631	req->ptr1 = SvPVbyte_nolen (req->sv1);
1245	req->fd = flags;	632	req->int1 = flags;
1246	req->mode = mode;	633	req->int2 = mode;
1247		634
1248	REQ_SEND;	635	REQ_SEND;
1249	}	636	}
1250		637
1251	void	638	void
1252	aio_close (fh,callback=&PL_sv_undef)	639	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$	640	PROTOTYPE: $;$
1256	ALIAS:	641	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	642	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	643	aio_fdatasync = EIO_FDATASYNC
1260	PPCODE:	644	PPCODE:
1261	{	645	{
		646	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	647	dREQ;
1263		648
1264	req->type = ix;	649	req->type = ix;
1265	req->fh = newSVsv (fh);	650	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	651	req->int1 = fd;
1267		652
1268	REQ_SEND (req);	653	REQ_SEND (req);
1269	}	654	}
1270		655
1271	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: $$$$;$
		659	PPCODE:
		660	{
		661	int fd = s_fileno_croak (fh, 0);
		662	dREQ;
		663
		664	req->type = EIO_SYNC_FILE_RANGE;
		665	req->sv1 = newSVsv (fh);
		666	req->int1 = fd;
		667	req->offs = offset;
		668	req->size = nbytes;
		669	req->int2 = flags;
		670
		671	REQ_SEND (req);
		672	}
		673
		674	void
		675	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		676	PROTOTYPE: $;$
		677	PPCODE:
		678	{
		679	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		680	int fd = s_fileno_croak (fh, 0);
		681	dREQ;
		682
		683	if (close_pipe < 0)
		684	{
		685	int pipefd [2];
		686
		687	if (pipe (pipefd) < 0
		688	|| close (pipefd [1]) < 0
		689	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		690	abort (); /*D*/
		691
		692	close_pipe = pipefd [0];
		693	}
		694
		695	req->type = EIO_DUP2;
		696	req->int1 = close_pipe;
		697	req->sv2 = newSVsv (fh);
		698	req->int2 = fd;
		699
		700	REQ_SEND (req);
		701	}
		702
		703	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	704	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1273	SV * fh
1274	UV offset
1275	UV length
1276	SV * data
1277	UV dataoffset
1278	SV * callback
1279	ALIAS:	705	ALIAS:
1280	aio_read = REQ_READ	706	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	707	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$	708	PROTOTYPE: $$$$$;$
1283	PPCODE:	709	PPCODE:
1284	{	710	{
1285	aio_req req;
1286	STRLEN svlen;	711	STRLEN svlen;
		712	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	713	char *svptr = SvPVbyte (data, svlen);
1288		714	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		715
1292	if (dataoffset < 0)	716	if (dataoffset < 0)
1293	dataoffset += svlen;	717	dataoffset += svlen;
1294		718
1295	if (dataoffset < 0 || dataoffset > svlen)	719	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	720	croak ("dataoffset outside of data scalar");
1297		721
1298	if (ix == REQ_WRITE)	722	if (ix == EIO_WRITE)
1299	{	723	{
1300	/* write: check length and adjust. */	724	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	725	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	726	len = svlen - dataoffset;
1303	}	727	}
1304	else	728	else
1305	{	729	{
1306	/* read: grow scalar as necessary */	730	/* read: check type and grow scalar as necessary */
		731	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	732	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	733	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		734
1313	{	735	{
1314	dREQ;	736	dREQ;
1315		737
1316	req->type = ix;	738	req->type = ix;
1317	req->fh = newSVsv (fh);	739	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	740	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	741	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	742	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	743	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	744	req->ptr2 = (char *)svptr + dataoffset;
		745	req->stroffset = dataoffset;
1324		746
1325	if (!SvREADONLY (data))	747	if (!SvREADONLY (data))
1326	{	748	{
1327	SvREADONLY_on (data);	749	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	750	req->flags |= FLAG_SV2_RO_OFF;
1329	}	751	}
1330		752
1331	REQ_SEND;	753	REQ_SEND;
1332	}	754	}
1333	}	755	}
1334		756
1335	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
1336	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)
1337	SV * out_fh
1338	SV * in_fh
1339	UV in_offset
1340	UV length
1341	SV * callback
1342	PROTOTYPE: $$$$;$	774	PROTOTYPE: $$$$;$
1343	PPCODE:	775	PPCODE:
1344	{	776	{
		777	int ifd = s_fileno_croak (in_fh , 0);
		778	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	779	dREQ;
1346		780
1347	req->type = REQ_SENDFILE;	781	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	782	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	783	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	784	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	785	req->int2 = ifd;
1352	req->offset = in_offset;	786	req->offs = in_offset;
1353	req->length = length;	787	req->size = length;
1354		788
1355	REQ_SEND;	789	REQ_SEND;
1356	}	790	}
1357		791
1358	void	792	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	793	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
1365	PPCODE:	795	PPCODE:
1366	{	796	{
		797	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	798	dREQ;
1368		799
1369	req->type = REQ_READAHEAD;	800	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	801	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	802	req->int1 = fd;
1372	req->offset = offset;	803	req->offs = offset;
1373	req->length = length;	804	req->size = length;
1374		805
1375	REQ_SEND;	806	REQ_SEND;
1376	}	807	}
1377		808
1378	void	809	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	810	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	811	ALIAS:
1383	aio_stat = REQ_STAT	812	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	813	aio_lstat = EIO_LSTAT
1385	PPCODE:	814	PPCODE:
1386	{	815	{
1387	dREQ;	816	dREQ;
1388		817
1389	New (0, req->statdata, 1, Stat_t);	818	req->sv1 = newSVsv (fh_or_path);
1390	if (!req->statdata)
1391	{
1392	req_free (req);
1393	croak ("out of memory during aio_req->statdata allocation");
1394	}
1395		819
1396	if (SvPOK (fh_or_path))	820	if (SvPOK (req->sv1))
1397	{	821	{
1398	req->type = ix;	822	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1401	}	824	}
1402	else	825	else
1403	{	826	{
1404	req->type = REQ_FSTAT;	827	req->type = EIO_FSTAT;
1405	req->fh = newSVsv (fh_or_path);
1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}	829	}
1408		830
1409	REQ_SEND;	831	REQ_SEND;
1410	}	832	}
1411		833
1412	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
1413	aio_unlink (pathname,callback=&PL_sv_undef)	949	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	950	ALIAS:
1417	aio_unlink = REQ_UNLINK	951	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	952	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	953	aio_readdir = EIO_READDIR
1420	PPCODE:	954	PPCODE:
1421	{	955	{
1422	dREQ;	956	dREQ;
1423		957
1424	req->type = ix;	958	req->type = ix;
1425	req->data = newSVsv (pathname);	959	req->sv1 = newSVsv (pathname);
1426	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);
1427		980
1428	REQ_SEND;	981	REQ_SEND;
1429	}	982	}
1430		983
1431	void	984	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	985	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:
1437	aio_link = REQ_LINK
1438	aio_symlink = REQ_SYMLINK
1439	aio_rename = REQ_RENAME
1440	PPCODE:	986	PPCODE:
1441	{	987	{
1442	dREQ;	988	dREQ;
1443		989
1444	req->type = ix;	990	req->type = EIO_MKNOD;
1445	req->fh = newSVsv (oldpath);	991	req->sv1 = newSVsv (pathname);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	992	req->ptr1 = SvPVbyte_nolen (req->sv1);
1447	req->data = newSVsv (newpath);	993	req->int2 = (mode_t)mode;
1448	req->dataptr = SvPVbyte_nolen (req->data);	994	req->offs = dev;
1449		995
1450	REQ_SEND;	996	REQ_SEND;
1451	}	997	}
1452		998
1453	void	999	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1000	aio_busy (double delay, SV *callback=&PL_sv_undef)
1455	SV * pathname
1456	SV * callback
1457	UV mode
1458	UV dev
1459	PPCODE:	1001	PPCODE:
1460	{	1002	{
1461	dREQ;	1003	dREQ;
1462		1004
1463	req->type = REQ_MKNOD;	1005	req->type = EIO_BUSY;
1464	req->data = newSVsv (pathname);	1006	req->nv1 = delay < 0. ? 0. : delay;
1465	req->dataptr = SvPVbyte_nolen (req->data);	1007
1466	req->mode = (mode_t)mode;
1467	req->offset = dev;
1468
1469	REQ_SEND;	1008	REQ_SEND;
1470	}	1009	}
1471		1010
1472	void	1011	void
1473	aio_busy (delay,callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:
1477	{
1478	dREQ;
1479
1480	req->type = REQ_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483
1484	REQ_SEND;
1485	}
1486
1487	void
1488	aio_group (callback=&PL_sv_undef)	1012	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$	1013	PROTOTYPE: ;$
1491	PPCODE:	1014	PPCODE:
1492	{	1015	{
1493	dREQ;	1016	dREQ;
1494		1017
1495	req->type = REQ_GROUP;	1018	req->type = EIO_GROUP;
		1019
1496	req_send (req);	1020	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1021	XPUSHs (req_sv (req, aio_grp_stash));
1499	}	1022	}
1500		1023
1501	void	1024	void
1502	aio_nop (callback=&PL_sv_undef)	1025	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1026	ALIAS:
		1027	aio_nop = EIO_NOP
		1028	aio_sync = EIO_SYNC
1504	PPCODE:	1029	PPCODE:
1505	{	1030	{
1506	dREQ;	1031	dREQ;
1507		1032
1508	req->type = REQ_NOP;	1033	req->type = ix;
1509		1034
1510	REQ_SEND;	1035	REQ_SEND;
1511	}	1036	}
1512		1037
1513	int	1038	int
1514	aioreq_pri (int pri = 0)	1039	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$	1040	PROTOTYPE: ;$
1516	CODE:	1041	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1042	RETVAL = next_pri;
1518	if (items > 0)	1043	if (items > 0)
1519	{	1044	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1045	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1046	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1047	next_pri = pri;
1523	}	1048	}
1524	OUTPUT:	1049	OUTPUT:
1525	RETVAL	1050	RETVAL
1526		1051
1527	void	1052	void
1528	aioreq_nice (int nice = 0)	1053	aioreq_nice (int nice = 0)
1529	CODE:	1054	CODE:
1530	nice = next_pri - nice;	1055	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1056	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1057	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1058	next_pri = nice;
1534		1059
1535	void	1060	void
1536	flush ()	1061	flush ()
1537	PROTOTYPE:	1062	PROTOTYPE:
1538	CODE:	1063	CODE:
1539	while (nreqs)	1064	while (eio_nreqs ())
1540	{	1065	{
1541	poll_wait ();	1066	poll_wait ();
1542	poll_cb (0);	1067	poll_cb ();
1543	}	1068	}
1544		1069
1545	void	1070	int
1546	poll()	1071	poll()
1547	PROTOTYPE:	1072	PROTOTYPE:
1548	CODE:	1073	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();	1074	poll_wait ();
1552	poll_cb (0);	1075	RETVAL = poll_cb ();
1553	}	1076	OUTPUT:
		1077	RETVAL
1554		1078
1555	int	1079	int
1556	poll_fileno()	1080	poll_fileno()
1557	PROTOTYPE:	1081	PROTOTYPE:
1558	CODE:	1082	CODE:
1559	RETVAL = respipe [0];	1083	RETVAL = s_epipe_fd (&respipe);
1560	OUTPUT:	1084	OUTPUT:
1561	RETVAL	1085	RETVAL
1562		1086
1563	int	1087	int
1564	poll_cb(...)	1088	poll_cb(...)
1565	PROTOTYPE:	1089	PROTOTYPE:
1566	CODE:	1090	CODE:
1567	RETVAL = poll_cb (0);	1091	RETVAL = poll_cb ();
1568	OUTPUT:	1092	OUTPUT:
1569	RETVAL	1093	RETVAL
1570		1094
1571	int
1572	poll_some(int max = 0)
1573	PROTOTYPE: $
1574	CODE:
1575	RETVAL = poll_cb (max);
1576	OUTPUT:
1577	RETVAL
1578
1579	void	1095	void
1580	poll_wait()	1096	poll_wait()
1581	PROTOTYPE:	1097	PROTOTYPE:
1582	CODE:	1098	CODE:
1583	if (nreqs)
1584	poll_wait ();	1099	poll_wait ();
1585		1100
1586	int	1101	int
1587	nreqs()	1102	nreqs()
1588	PROTOTYPE:	1103	PROTOTYPE:
1589	CODE:	1104	CODE:
1590	RETVAL = nreqs;	1105	RETVAL = eio_nreqs ();
1591	OUTPUT:	1106	OUTPUT:
1592	RETVAL	1107	RETVAL
1593		1108
1594	int	1109	int
1595	nready()	1110	nready()
1596	PROTOTYPE:	1111	PROTOTYPE:
1597	CODE:	1112	CODE:
1598	RETVAL = get_nready ();	1113	RETVAL = eio_nready ();
1599	OUTPUT:	1114	OUTPUT:
1600	RETVAL	1115	RETVAL
1601		1116
1602	int	1117	int
1603	npending()	1118	npending()
1604	PROTOTYPE:	1119	PROTOTYPE:
1605	CODE:	1120	CODE:
1606	RETVAL = get_npending ();	1121	RETVAL = eio_npending ();
1607	OUTPUT:	1122	OUTPUT:
1608	RETVAL	1123	RETVAL
1609		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	eio_sendfile_sync (ofh, ifh, offset, count);
		1150
		1151	void _on_next_submit (SV *cb)
		1152	CODE:
		1153	SvREFCNT_dec (on_next_submit);
		1154	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1155
1610	PROTOTYPES: DISABLE	1156	PROTOTYPES: DISABLE
1611		1157
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1158	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1159
1614	void	1160	void
1615	cancel (aio_req_ornot req)	1161	cancel (aio_req_ornot req)
1616	CODE:	1162	CODE:
1617	req_cancel (req);	1163	eio_cancel (req);
1618		1164
1619	void	1165	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1166	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1167	PPCODE:
		1168	{
		1169	if (GIMME_V != G_VOID)
		1170	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1171
		1172	if (items > 1)
		1173	{
		1174	SV *cb_cv =get_cb (callback);
		1175
1622	SvREFCNT_dec (req->callback);	1176	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1177	req->callback = SvREFCNT_inc (cb_cv);
		1178	}
		1179	}
1624		1180
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1181	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1182
1627	void	1183	void
1628	add (aio_req grp, ...)	1184	add (aio_req grp, ...)
1629	PPCODE:	1185	PPCODE:
1630	{	1186	{
1631	int i;	1187	int i;
1632	aio_req req;
1633		1188
1634	if (grp->fd == 2)	1189	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1190	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1191
1637	for (i = 1; i < items; ++i )	1192	for (i = 1; i < items; ++i )
1638	{	1193	{
		1194	aio_req req;
		1195
1639	if (GIMME_V != G_VOID)	1196	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1197	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1198
1642	req = SvAIO_REQ (ST (i));	1199	req = SvAIO_REQ (ST (i));
1643		1200
1644	if (req)	1201	if (req)
1645	{	1202	eio_grp_add (grp, req);
1646	++grp->length;
1647	req->grp = grp;
1648
1649	req->grp_prev = 0;
1650	req->grp_next = grp->grp_first;
1651
1652	if (grp->grp_first)
1653	grp->grp_first->grp_prev = req;
1654
1655	grp->grp_first = req;
1656	}
1657	}	1203	}
1658	}	1204	}
1659		1205
1660	void	1206	void
1661	cancel_subs (aio_req_ornot req)	1207	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1216	AV *av;
1671		1217
1672	grp->errorno = errno;	1218	grp->errorno = errno;
1673		1219
1674	av = newAV ();	1220	av = newAV ();
		1221	av_extend (av, items - 1);
1675		1222
1676	for (i = 1; i < items; ++i )	1223	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1224	av_push (av, newSVsv (ST (i)));
1678		1225
1679	SvREFCNT_dec (grp->data);	1226	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1227	grp->sv1 = (SV *)av;
1681	}	1228	}
1682		1229
1683	void	1230	void
1684	errno (aio_req grp, int errorno = errno)	1231	errno (aio_req grp, int errorno = errno)
1685	CODE:	1232	CODE:
1686	grp->errorno = errorno;	1233	grp->errorno = errorno;
1687		1234
1688	void	1235	void
1689	limit (aio_req grp, int limit)	1236	limit (aio_req grp, int limit)
1690	CODE:	1237	CODE:
1691	grp->fd2 = limit;	1238	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1239
1694	void	1240	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1241	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1242	CODE:
1697	{	1243	{
1698	SvREFCNT_dec (grp->fh2);	1244	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1245	grp->sv2 = newSVsv (callback);
		1246	grp->feed = aio_grp_feed;
1700		1247
1701	if (grp->fd2 <= 0)	1248	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1249	grp->int2 = 2;
1703		1250
1704	aio_grp_feed (grp);	1251	eio_grp_limit (grp, grp->int2);
1705	}	1252	}
1706		1253

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