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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.91 by root, Wed Nov 8 01:57:43 2006 UTC vs.
Revision 1.136 by root, Sun Apr 19 13:15:55 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"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
22	#include <errno.h>	11	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	12	#include <sys/types.h>
26	#include <sys/stat.h>	13	#include <sys/stat.h>
27	#include <limits.h>	14	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	15	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	16	#include <sched.h>
32		17
33	#if HAVE_SENDFILE	18	/* perl namespace pollution */
34	# if __linux	19	#undef VERSION
35	# include <sys/sendfile.h>	20
36	# elif __freebsd	21	#ifdef _WIN32
37	# include <sys/socket.h>	22
38	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	24	# undef malloc
40	# include <sys/socket.h>	25	# undef free
41	# elif __solaris /* not yet */	26
42	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
43	# else	59	#else
44	# error sendfile support requested but not available	60
45	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
46	#endif	68	#endif
47		69
48	/* number of seconds after which idle threads exit */	70	/* perl stupidly overrides readdir and maybe others */
49	#define IDLE_TIMEOUT 10	71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
50		75
51	/* used for struct dirent, AIX doesn't provide it */	76	#define EIO_STRUCT_STAT Stat_t
52	#ifndef NAME_MAX	77
53	# define NAME_MAX 4096	78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
54	#endif	83	#endif
55		84
56	#ifndef PTHREAD_STACK_MIN	85	/*****************************************************************************/
57	/* care for broken platforms, e.g. windows */	86
58	# define PTHREAD_STACK_MIN 16384	87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
59	#endif	91	#endif
60		92
61	#if __ia64	93	#define expect_false(expr) expect ((expr) != 0, 0)
62	# define STACKSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68		95
69	/* wether word reads are potentially non-atomic.	96	/*****************************************************************************/
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDACCESS_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDACCESS_UNSAFE 0
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif
79	#endif
80		97
81	/* buffer size for various temporary buffers */	98	static HV *stash;
82	#define AIO_BUFSIZE 65536
83
84	#define dBUF \
85	char *aio_buf; \
86	LOCK (wrklock); \
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91
92	typedef SV SV8; /* byte-sv, used for argument-checking */	99	typedef SV SV8; /* byte-sv, used for argument-checking */
93
94	enum {
95	REQ_QUIT,
96	REQ_OPEN, REQ_CLOSE,
97	REQ_READ, REQ_WRITE, REQ_READAHEAD,
98	REQ_SENDFILE,
99	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
100	REQ_FSYNC, REQ_FDATASYNC,
101	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
102	REQ_MKNOD, REQ_READDIR,
103	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104	REQ_GROUP, REQ_NOP,
105	REQ_BUSY,
106	};
107		100
108	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
109	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
110		103
111	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
112	{
113	struct aio_cb *volatile next;
114
115	SV *callback, *fh;	105	SV *callback; \
116	SV *sv1, *sv2;	106	SV *sv1, *sv2; \
117	void *ptr1, *ptr2;
118	off_t offs;
119	size_t size;
120	ssize_t result;
121
122	STRLEN stroffset;	107	STRLEN stroffset; \
123	int type;	108	SV *self;
124	int int1, int2;
125	int errorno;
126	mode_t mode; /* open */
127		109
128	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
129	unsigned char pri;
130		111
131	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
133	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
134		118
135	enum {	119	enum {
136	FLAG_CANCELLED = 0x01, /* request was cancelled */
137	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
138	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139	};	121	};
140		122
		123	#include "libeio/eio.c"
		124
141	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
142	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
143		127
144	enum {	128	static SV *on_next_submit;
145	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
146	PRI_MAX = 4,	130	static int max_outstanding;
147		131
148	DEFAULT_PRI = 0,	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
149	PRI_BIAS = -PRI_MIN,
150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151	};
152		133
153	#define AIO_TICKS ((1000000 + 1023) >> 10)
154
155	static unsigned int max_poll_time = 0;
156	static unsigned int max_poll_reqs = 0;
157
158	/* calculcate time difference in ~1/AIO_TICKS of a second */
159	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
160	{
161	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171	#else
172	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173	#endif
174
175	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178	/* worker threads management */
179	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
180
181	typedef struct worker {
182	/* locked by wrklock */
183	struct worker *prev, *next;
184
185	pthread_t tid;
186
187	/* locked by reslock, reqlock or wrklock */
188	aio_req req; /* currently processed request */
189	void *dbuf;
190	DIR *dirp;
191	} worker;
192
193	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
194
195	static void worker_clear (worker *wrk)
196	{
197	if (wrk->dirp)
198	{
199	closedir (wrk->dirp);
200	wrk->dirp = 0;
201	}
202
203	if (wrk->dbuf)
204	{
205	free (wrk->dbuf);
206	wrk->dbuf = 0;
207	}
208	}
209
210	static void worker_free (worker *wrk)
211	{
212	wrk->next->prev = wrk->prev;
213	wrk->prev->next = wrk->next;
214
215	free (wrk);
216	}
217
218	static volatile unsigned int nreqs, nready, npending;
219	static volatile unsigned int max_idle = 4;
220	static volatile unsigned int max_outstanding = 0xffffffff;
221	static int respipe [2];
222
223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
226
227	#if WORDACCESS_UNSAFE
228
229	static unsigned int get_nready ()
230	{
231	unsigned int retval;
232
233	LOCK (reqlock);
234	retval = nready;
235	UNLOCK (reqlock);
236
237	return retval;
238	}
239
240	static unsigned int get_npending ()
241	{
242	unsigned int retval;
243
244	LOCK (reslock);
245	retval = npending;
246	UNLOCK (reslock);
247
248	return retval;
249	}
250
251	static unsigned int get_nthreads ()
252	{
253	unsigned int retval;
254
255	LOCK (wrklock);
256	retval = started;
257	UNLOCK (wrklock);
258
259	return retval;
260	}
261
262	#else
263
264	# define get_nready() nready
265	# define get_npending() npending
266	# define get_nthreads() started
267
268	#endif
269
270	/*
271	* a somewhat faster data structure might be nice, but
272	* with 8 priorities this actually needs <20 insns
273	* per shift, the most expensive operation.
274	*/
275	typedef struct {
276	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
277	int size;
278	} reqq;
279
280	static reqq req_queue;
281	static reqq res_queue;
282
283	int reqq_push (reqq *q, aio_req req)
284	{
285	int pri = req->pri;
286	req->next = 0;
287
288	if (q->qe[pri])
289	{
290	q->qe[pri]->next = req;
291	q->qe[pri] = req;
292	}
293	else
294	q->qe[pri] = q->qs[pri] = req;
295
296	return q->size++;
297	}
298
299	aio_req reqq_shift (reqq *q)
300	{
301	int pri;
302
303	if (!q->size)
304	return 0;
305
306	--q->size;
307
308	for (pri = NUM_PRI; pri--; )
309	{
310	aio_req req = q->qs[pri];
311
312	if (req)
313	{
314	if (!(q->qs[pri] = req->next))
315	q->qe[pri] = 0;
316
317	return req;
318	}
319	}
320
321	abort ();
322	}
323
324	static int poll_cb ();
325	static void req_invoke (aio_req req);
326	static void req_free (aio_req req);	134	static void req_destroy (aio_req req);
327	static void req_cancel (aio_req req);	135	static void req_cancel (aio_req req);
		136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
328		150
329	/* must be called at most once */	151	/* must be called at most once */
330	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
331	{	153	{
332	if (!req->self)	154	if (!req->self)
…		…
350	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
351	}	173	}
352		174
353	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
354	{	176	{
355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
356	{	178	{
357	int old_len = grp->size;
358
359	if (grp->sv2 && SvOK (grp->sv2))
360	{
361	dSP;	179	dSP;
362		180
363	ENTER;	181	ENTER;
364	SAVETMPS;	182	SAVETMPS;
365	PUSHMARK (SP);	183	PUSHMARK (SP);
366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
367	PUTBACK;	185	PUTBACK;
368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369	SPAGAIN;	187	SPAGAIN;
370	FREETMPS;	188	FREETMPS;
371	LEAVE;	189	LEAVE;
372	}
373
374	/* stop if no progress has been made */
375	if (old_len == grp->size)
376	{
377	SvREFCNT_dec (grp->sv2);
378	grp->sv2 = 0;
379	break;
380	}
381	}	190	}
382	}	191	}
383		192
384	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
385	{	194	{
386	--grp->size;	195	eio_submit (req);
387		196
388	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
389	aio_grp_feed (grp);
390
391	/* finish, if done */
392	if (!grp->size && grp->int1)
393	{	198	{
394	req_invoke (grp);	199	dSP;
395	req_free (grp);	200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
396	}	207	}
397	}	208	}
398		209
399	static void req_invoke (aio_req req)	210	static int req_invoke (eio_req *req)
400	{	211	{
401	dSP;	212	dSP;
402		213
403	if (req->flags & FLAG_SV1_RO_OFF)	214	if (req->flags & FLAG_SV2_RO_OFF)
404	SvREADONLY_off (req->sv1);	215	SvREADONLY_off (req->sv2);
405		216
406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	217	if (!EIO_CANCELLED (req) && req->callback)
407	{	218	{
408	ENTER;	219	ENTER;
409	SAVETMPS;	220	SAVETMPS;
410	PUSHMARK (SP);	221	PUSHMARK (SP);
411	EXTEND (SP, 1);	222	EXTEND (SP, 1);
412		223
413	switch (req->type)	224	switch (req->type)
414	{	225	{
415	case REQ_READDIR:	226	case EIO_READDIR:
416	{	227	{
417	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
418		229
419	if (req->result >= 0)	230	if (req->result >= 0)
420	{	231	{
…		…
437		248
438	PUSHs (rv);	249	PUSHs (rv);
439	}	250	}
440	break;	251	break;
441		252
442	case REQ_OPEN:	253	case EIO_OPEN:
443	{	254	{
444	/* convert fd to fh */	255	/* convert fd to fh */
445	SV *fh;	256	SV *fh = &PL_sv_undef;
446		257
447	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
448	PUTBACK;	259	{
449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
450	SPAGAIN;	261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
451		267
452	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
453		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
454	PUSHMARK (SP);	280	PUSHs (fh);
455	XPUSHs (sv_2mortal (fh));
456	}	281	}
457	break;	282	break;
458		283
459	case REQ_GROUP:	284	case EIO_GROUP:
460	req->int1 = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
461		286
462	if (req->sv1)	287	if (req->sv1)
463	{	288	{
464	int i;	289	int i;
…		…
468	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
469	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
470	}	295	}
471	break;	296	break;
472		297
473	case REQ_NOP:	298	case EIO_NOP:
474	case REQ_BUSY:	299	case EIO_BUSY:
475	break;	300	break;
476		301
477	case REQ_READLINK:	302	case EIO_READLINK:
478	if (req->result > 0)	303	if (req->result > 0)
479	{	304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
480	SvCUR_set (req->sv1, req->result);
481	*SvEND (req->sv1) = 0;
482	PUSHs (req->sv1);
483	}
484	break;	305	break;
485		306
486	case REQ_STAT:	307	case EIO_STAT:
487	case REQ_LSTAT:	308	case EIO_LSTAT:
488	case REQ_FSTAT:	309	case EIO_FSTAT:
489	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
490	PL_laststatval = req->result;	311	PL_laststatval = req->result;
491	PL_statcache = *(Stat_t *)(req->ptr2);	312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
492	PUSHs (sv_2mortal (newSViv (req->result)));	313	PUSHs (sv_2mortal (newSViv (req->result)));
493	break;	314	break;
494		315
495	case REQ_READ:	316	case EIO_READ:
496	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
497	*SvEND (req->sv1) = 0;	318	*SvEND (req->sv2) = 0;
498	PUSHs (sv_2mortal (newSViv (req->result)));	319	PUSHs (sv_2mortal (newSViv (req->result)));
499	break;	320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
500		326
501	default:	327	default:
502	PUSHs (sv_2mortal (newSViv (req->result)));	328	PUSHs (sv_2mortal (newSViv (req->result)));
503	break;	329	break;
504	}	330	}
505		331
506	errno = req->errorno;	332	errno = req->errorno;
507		333
508	PUTBACK;	334	PUTBACK;
509	call_sv (req->callback, G_VOID | G_EVAL);	335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
510	SPAGAIN;	336	SPAGAIN;
511		337
512	FREETMPS;	338	FREETMPS;
513	LEAVE;	339	LEAVE;
		340
		341	PUTBACK;
514	}	342	}
515		343
516	if (req->grp)	344	return !!SvTRUE (ERRSV);
517	{
518	aio_req grp = req->grp;
519
520	/* unlink request */
521	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
522	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
523
524	if (grp->grp_first == req)
525	grp->grp_first = req->grp_next;
526
527	aio_grp_dec (grp);
528	}
529
530	if (SvTRUE (ERRSV))
531	{
532	req_free (req);
533	croak (0);
534	}
535	}	345	}
536		346
537	static void req_free (aio_req req)	347	static void req_destroy (aio_req req)
538	{	348	{
539	if (req->self)	349	if (req->self)
540	{	350	{
541	sv_unmagic (req->self, PERL_MAGIC_ext);	351	sv_unmagic (req->self, PERL_MAGIC_ext);
542	SvREFCNT_dec (req->self);	352	SvREFCNT_dec (req->self);
543	}	353	}
544		354
545	SvREFCNT_dec (req->fh);
546	SvREFCNT_dec (req->sv1);	355	SvREFCNT_dec (req->sv1);
547	SvREFCNT_dec (req->sv2);	356	SvREFCNT_dec (req->sv2);
548	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
549		358
550	if (req->flags & FLAG_PTR2_FREE)
551	free (req->ptr2);
552
553	Safefree (req);	359	Safefree (req);
554	}	360	}
555		361
556	static void req_cancel_subs (aio_req grp)	362	static void req_cancel_subs (aio_req grp)
557	{	363	{
558	aio_req sub;	364	aio_req sub;
559		365
560	if (grp->type != REQ_GROUP)	366	if (grp->type != EIO_GROUP)
561	return;	367	return;
562		368
563	SvREFCNT_dec (grp->sv2);	369	SvREFCNT_dec (grp->sv2);
564	grp->sv2 = 0;	370	grp->sv2 = 0;
565		371
566	for (sub = grp->grp_first; sub; sub = sub->grp_next)	372	eio_grp_cancel (grp);
567	req_cancel (sub);
568	}	373	}
569		374
570	static void req_cancel (aio_req req)	375	#ifdef USE_SOCKETS_AS_HANDLES
571	{	376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
572	req->flags |= FLAG_CANCELLED;	377	#else
573		378	# define TO_SOCKET(x) (x)
574	req_cancel_subs (req);
575	}
576
577	static void *aio_proc(void *arg);
578
579	static void start_thread (void)
580	{
581	sigset_t fullsigset, oldsigset;
582	pthread_attr_t attr;
583
584	worker *wrk = calloc (1, sizeof (worker));
585
586	if (!wrk)
587	croak ("unable to allocate worker thread data");
588
589	pthread_attr_init (&attr);
590	pthread_attr_setstacksize (&attr, STACKSIZE);
591	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
592	#ifdef PTHREAD_SCOPE_PROCESS
593	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
594	#endif	379	#endif
595		380
596	sigfillset (&fullsigset);	381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
597		385
598	LOCK (wrklock);	386	if (respipe [1] >= 0)
599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	387	respipe_close (TO_SOCKET (respipe [1]));
600		388
601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
602	{	397	{
603	wrk->prev = &wrk_first;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
604	wrk->next = wrk_first.next;	399	croak ("unable to initialize result pipe(2)");
605	wrk_first.next->prev = wrk;	400
606	wrk_first.next = wrk;	401	respipe_close (respipe [0]);
607	++started;	402	respipe [0] = old_readfd;
608	}	403	}
609	else
610	free (wrk);
611		404
612	sigprocmask (SIG_SETMASK, &oldsigset, 0);	405	#ifdef _WIN32
613	UNLOCK (wrklock);	406	int arg = 1;
614	}	407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
615		414
616	static void maybe_start_thread ()	415	respipe_osf [0] = TO_SOCKET (respipe [0]);
617	{	416	respipe_osf [1] = TO_SOCKET (respipe [1]);
618	if (get_nthreads () >= wanted)
619	return;
620
621	/* todo: maybe use idle here, but might be less exact */
622	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
623	return;
624
625	start_thread ();
626	}	417	}
627		418
628	static void req_send (aio_req req)
629	{
630	++nreqs;
631
632	LOCK (reqlock);
633	++nready;
634	reqq_push (&req_queue, req);
635	pthread_cond_signal (&reqwait);
636	UNLOCK (reqlock);
637
638	maybe_start_thread ();
639	}
640
641	static void end_thread (void)
642	{
643	aio_req req;
644
645	Newz (0, req, 1, aio_cb);
646
647	req->type = REQ_QUIT;
648	req->pri = PRI_MAX + PRI_BIAS;
649
650	LOCK (reqlock);
651	reqq_push (&req_queue, req);
652	pthread_cond_signal (&reqwait);
653	UNLOCK (reqlock);
654
655	LOCK (wrklock);
656	--started;
657	UNLOCK (wrklock);
658	}
659
660	static void set_max_idle (int nthreads)
661	{
662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
663	max_idle = nthreads <= 0 ? 1 : nthreads;
664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
665	}
666
667	static void min_parallel (int nthreads)
668	{
669	if (wanted < nthreads)
670	wanted = nthreads;
671	}
672
673	static void max_parallel (int nthreads)
674	{
675	if (wanted > nthreads)
676	wanted = nthreads;
677
678	while (started > wanted)
679	end_thread ();
680	}
681
682	static void poll_wait ()	419	static void poll_wait (void)
683	{	420	{
684	fd_set rfd;	421	fd_set rfd;
685		422
686	while (nreqs)	423	while (eio_nreqs ())
687	{	424	{
688	int size;	425	int size;
689	if (WORDACCESS_UNSAFE) LOCK (reslock);	426
		427	X_LOCK (reslock);
690	size = res_queue.size;	428	size = res_queue.size;
691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	429	X_UNLOCK (reslock);
692		430
693	if (size)	431	if (size)
694	return;	432	return;
695		433
696	maybe_start_thread ();	434	etp_maybe_start_thread ();
697		435
698	FD_ZERO(&rfd);	436	FD_ZERO (&rfd);
699	FD_SET(respipe [0], &rfd);	437	FD_SET (respipe [0], &rfd);
700		438
701	select (respipe [0] + 1, &rfd, 0, 0, 0);	439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
702	}	440	}
703	}	441	}
704		442
705	static int poll_cb ()	443	static int poll_cb (void)
706	{	444	{
707	dSP;
708	int count = 0;
709	int maxreqs = max_poll_reqs;
710	int do_croak = 0;
711	struct timeval tv_start, tv_now;
712	aio_req req;
713
714	if (max_poll_time)
715	gettimeofday (&tv_start, 0);
716
717	for (;;)	445	for (;;)
718	{	446	{
719	for (;;)	447	int res = eio_poll ();
720	{
721	maybe_start_thread ();
722		448
723	LOCK (reslock);	449	if (res > 0)
724	req = reqq_shift (&res_queue);
725
726	if (req)
727	{
728	--npending;
729
730	if (!res_queue.size)
731	{
732	/* read any signals sent by the worker threads */
733	char buf [32];
734	while (read (respipe [0], buf, 32) == 32)
735	;
736	}
737	}
738
739	UNLOCK (reslock);
740
741	if (!req)
742	break;
743
744	--nreqs;
745
746	if (req->type == REQ_GROUP && req->size)
747	{
748	req->int1 = 1; /* mark request as delayed */
749	continue;
750	}
751	else
752	{
753	req_invoke (req);
754
755	count++;
756	}
757
758	req_free (req);
759
760	if (maxreqs && !--maxreqs)
761	break;
762
763	if (max_poll_time)
764	{
765	gettimeofday (&tv_now, 0);
766
767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
768	break;
769	}
770	}
771
772	if (nreqs <= max_outstanding)
773	break;	450	croak (0);
		451
		452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
774		454
775	poll_wait ();	455	poll_wait ();
776
777	++maxreqs;
778	}	456	}
779
780	return count;
781	}	457	}
782		458
783	static void create_pipe ()	459	static void atfork_child (void)
784	{	460	{
785	if (pipe (respipe))	461	create_respipe ();
786	croak ("unable to initialize result pipe");
787
788	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790
791	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
792	croak ("cannot set result pipe to nonblocking mode");
793	}	462	}
794		463
795	/*****************************************************************************/	464	static SV *
796	/* work around various missing functions */	465	get_cb (SV *cb_sv)
797
798	#if !HAVE_PREADWRITE
799	# define pread aio_pread
800	# define pwrite aio_pwrite
801
802	/*
803	* make our pread/pwrite safe against themselves, but not against
804	* normal read/write by using a mutex. slows down execution a lot,
805	* but that's your problem, not mine.
806	*/
807	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
808
809	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
810	{	466	{
811	ssize_t res;	467	HV *st;
812	off_t ooffset;	468	GV *gvp;
		469	CV *cv;
813		470
814	LOCK (preadwritelock);	471	if (!SvOK (cb_sv))
815	ooffset = lseek (fd, 0, SEEK_CUR);
816	lseek (fd, offset, SEEK_SET);
817	res = read (fd, buf, count);
818	lseek (fd, ooffset, SEEK_SET);
819	UNLOCK (preadwritelock);
820
821	return res;
822	}
823
824	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
825	{
826	ssize_t res;
827	off_t ooffset;
828
829	LOCK (preadwritelock);
830	ooffset = lseek (fd, 0, SEEK_CUR);
831	lseek (fd, offset, SEEK_SET);
832	res = write (fd, buf, count);
833	lseek (fd, offset, SEEK_SET);
834	UNLOCK (preadwritelock);
835
836	return res;
837	}
838	#endif
839
840	#if !HAVE_FDATASYNC
841	# define fdatasync fsync
842	#endif
843
844	#if !HAVE_READAHEAD
845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
846
847	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
848	{
849	dBUF;
850
851	while (count > 0)
852	{
853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
854
855	pread (fd, aio_buf, len, offset);
856	offset += len;
857	count -= len;
858	}
859
860	errno = 0;
861	}
862
863	#endif
864
865	#if !HAVE_READDIR_R
866	# define readdir_r aio_readdir_r
867
868	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
869
870	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
871	{
872	struct dirent *e;
873	int errorno;
874
875	LOCK (readdirlock);
876
877	e = readdir (dirp);
878	errorno = errno;
879
880	if (e)
881	{
882	*res = ent;
883	strcpy (ent->d_name, e->d_name);
884	}
885	else
886	*res = 0;
887
888	UNLOCK (readdirlock);
889
890	errno = errorno;
891	return e ? 0 : -1;
892	}
893	#endif
894
895	/* sendfile always needs emulation */
896	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
897	{
898	ssize_t res;
899
900	if (!count)
901	return 0;	472	return 0;
902		473
903	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
904	# if __linux
905	res = sendfile (ofd, ifd, &offset, count);
906		475
907	# elif __freebsd	476	if (!cv)
908	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
909	* Of course, the freebsd sendfile is a dire hack with no thoughts
910	* wasted on making it similar to other I/O functions.
911	*/
912	{
913	off_t sbytes;
914	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
915		478
916	if (res < 0 && sbytes)	479	return (SV *)cv;
917	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
918	res = sbytes;
919	}
920
921	# elif __hpux
922	res = sendfile (ofd, ifd, offset, count, 0, 0);
923
924	# elif __solaris
925	{
926	struct sendfilevec vec;
927	size_t sbytes;
928
929	vec.sfv_fd = ifd;
930	vec.sfv_flag = 0;
931	vec.sfv_off = offset;
932	vec.sfv_len = count;
933
934	res = sendfilev (ofd, &vec, 1, &sbytes);
935
936	if (res < 0 && sbytes)
937	res = sbytes;
938	}
939
940	# endif
941	#else
942	res = -1;
943	errno = ENOSYS;
944	#endif
945
946	if (res < 0
947	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
948	#if __solaris
949	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
950	#endif
951	)
952	)
953	{
954	/* emulate sendfile. this is a major pain in the ass */
955	dBUF;
956
957	res = 0;
958
959	while (count)
960	{
961	ssize_t cnt;
962
963	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
964
965	if (cnt <= 0)
966	{
967	if (cnt && !res) res = -1;
968	break;
969	}
970
971	cnt = write (ofd, aio_buf, cnt);
972
973	if (cnt <= 0)
974	{
975	if (cnt && !res) res = -1;
976	break;
977	}
978
979	offset += cnt;
980	res += cnt;
981	count -= cnt;
982	}
983	}
984
985	return res;
986	}
987
988	/* read a full directory */
989	static void scandir_ (aio_req req, worker *self)
990	{
991	DIR *dirp;
992	union
993	{
994	struct dirent d;
995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
996	} *u;
997	struct dirent *entp;
998	char *name, *names;
999	int memlen = 4096;
1000	int memofs = 0;
1001	int res = 0;
1002	int errorno;
1003
1004	LOCK (wrklock);
1005	self->dirp = dirp = opendir (req->ptr1);
1006	self->dbuf = u = malloc (sizeof (*u));
1007	req->flags |= FLAG_PTR2_FREE;
1008	req->ptr2 = names = malloc (memlen);
1009	UNLOCK (wrklock);
1010
1011	if (dirp && u && names)
1012	for (;;)
1013	{
1014	errno = 0;
1015	readdir_r (dirp, &u->d, &entp);
1016
1017	if (!entp)
1018	break;
1019
1020	name = entp->d_name;
1021
1022	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1023	{
1024	int len = strlen (name) + 1;
1025
1026	res++;
1027
1028	while (memofs + len > memlen)
1029	{
1030	memlen *= 2;
1031	LOCK (wrklock);
1032	req->ptr2 = names = realloc (names, memlen);
1033	UNLOCK (wrklock);
1034
1035	if (!names)
1036	break;
1037	}
1038
1039	memcpy (names + memofs, name, len);
1040	memofs += len;
1041	}
1042	}
1043
1044	if (errno)
1045	res = -1;
1046
1047	req->result = res;
1048	}
1049
1050	/*****************************************************************************/
1051
1052	static void *aio_proc (void *thr_arg)
1053	{
1054	aio_req req;
1055	struct timespec ts;
1056	worker *self = (worker *)thr_arg;
1057
1058	/* try to distribute timeouts somewhat evenly */
1059	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1060	* (1000000000UL / 1024UL);
1061
1062	for (;;)
1063	{
1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1065
1066	LOCK (reqlock);
1067
1068	for (;;)
1069	{
1070	self->req = req = reqq_shift (&req_queue);
1071
1072	if (req)
1073	break;
1074
1075	++idle;
1076
1077	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1078	== ETIMEDOUT)
1079	{
1080	if (idle > max_idle)
1081	{
1082	--idle;
1083	UNLOCK (reqlock);
1084	LOCK (wrklock);
1085	--started;
1086	UNLOCK (wrklock);
1087	goto quit;
1088	}
1089
1090	/* we are allowed to idle, so do so without any timeout */
1091	pthread_cond_wait (&reqwait, &reqlock);
1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1093	}
1094
1095	--idle;
1096	}
1097
1098	--nready;
1099
1100	UNLOCK (reqlock);
1101
1102	errno = 0; /* strictly unnecessary */
1103
1104	if (!(req->flags & FLAG_CANCELLED))
1105	switch (req->type)
1106	{
1107	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1108	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1109
1110	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1111	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1112
1113	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1114	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1115	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1116
1117	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1118	case REQ_CLOSE: req->result = close (req->int1); break;
1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1123	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1124	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1125	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1126
1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1128	case REQ_FSYNC: req->result = fsync (req->int1); break;
1129	case REQ_READDIR: scandir_ (req, self); break;
1130
1131	case REQ_BUSY:
1132	{
1133	struct timeval tv;
1134
1135	tv.tv_sec = req->int1;
1136	tv.tv_usec = req->int2;
1137
1138	req->result = select (0, 0, 0, 0, &tv);
1139	}
1140
1141	case REQ_GROUP:
1142	case REQ_NOP:
1143	break;
1144
1145	case REQ_QUIT:
1146	goto quit;
1147
1148	default:
1149	req->result = ENOSYS;
1150	break;
1151	}
1152
1153	req->errorno = errno;
1154
1155	LOCK (reslock);
1156
1157	++npending;
1158
1159	if (!reqq_push (&res_queue, req))
1160	/* write a dummy byte to the pipe so fh becomes ready */
1161	write (respipe [1], &respipe, 1);
1162
1163	self->req = 0;
1164	worker_clear (self);
1165
1166	UNLOCK (reslock);
1167	}
1168
1169	quit:
1170	LOCK (wrklock);
1171	worker_free (self);
1172	UNLOCK (wrklock);
1173
1174	return 0;
1175	}
1176
1177	/*****************************************************************************/
1178
1179	static void atfork_prepare (void)
1180	{
1181	LOCK (wrklock);
1182	LOCK (reqlock);
1183	LOCK (reslock);
1184	#if !HAVE_PREADWRITE
1185	LOCK (preadwritelock);
1186	#endif
1187	#if !HAVE_READDIR_R
1188	LOCK (readdirlock);
1189	#endif
1190	}
1191
1192	static void atfork_parent (void)
1193	{
1194	#if !HAVE_READDIR_R
1195	UNLOCK (readdirlock);
1196	#endif
1197	#if !HAVE_PREADWRITE
1198	UNLOCK (preadwritelock);
1199	#endif
1200	UNLOCK (reslock);
1201	UNLOCK (reqlock);
1202	UNLOCK (wrklock);
1203	}
1204
1205	static void atfork_child (void)
1206	{
1207	aio_req prv;
1208
1209	while (prv = reqq_shift (&req_queue))
1210	req_free (prv);
1211
1212	while (prv = reqq_shift (&res_queue))
1213	req_free (prv);
1214
1215	while (wrk_first.next != &wrk_first)
1216	{
1217	worker *wrk = wrk_first.next;
1218
1219	if (wrk->req)
1220	req_free (wrk->req);
1221
1222	worker_clear (wrk);
1223	worker_free (wrk);
1224	}
1225
1226	started = 0;
1227	idle = 0;
1228	nreqs = 0;
1229	nready = 0;
1230	npending = 0;
1231
1232	close (respipe [0]);
1233	close (respipe [1]);
1234	create_pipe ();
1235
1236	atfork_parent ();
1237	}	480	}
1238		481
1239	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
1240	aio_req req; \	484	aio_req req; \
1241	int req_pri = next_pri; \	485	int req_pri = next_pri; \
1242	next_pri = DEFAULT_PRI + PRI_BIAS; \	486	next_pri = EIO_PRI_DEFAULT; \
1243	\	487	\
1244	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
1245	croak ("callback must be undef or of reference type"); \
1246	\	489	\
1247	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
1248	if (!req) \	491	if (!req) \
1249	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
1250	\	493	\
1251	req->callback = newSVsv (callback); \	494	req->callback = SvREFCNT_inc (cb_cv); \
1252	req->pri = req_pri	495	req->pri = req_pri
1253		496
1254	#define REQ_SEND \	497	#define REQ_SEND \
		498	PUTBACK; \
1255	req_send (req); \	499	req_submit (req); \
		500	SPAGAIN; \
1256	\	501	\
1257	if (GIMME_V != G_VOID) \	502	if (GIMME_V != G_VOID) \
1258	XPUSHs (req_sv (req, AIO_REQ_KLASS));	503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1259		504
		505	static int
		506	extract_fd (SV *fh, int wr)
		507	{
		508	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		509
		510	if (fd < 0)
		511	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		512
		513	return fd;
		514	}
		515
1260	MODULE = IO::AIO PACKAGE = IO::AIO	516	MODULE = IO::AIO PACKAGE = IO::AIO
1261		517
1262	PROTOTYPES: ENABLE	518	PROTOTYPES: ENABLE
1263		519
1264	BOOT:	520	BOOT:
1265	{	521	{
1266	HV *stash = gv_stashpv ("IO::AIO", 1);	522	stash = gv_stashpv ("IO::AIO", 1);
1267		523
1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	524	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	525	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1270	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	526	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1271	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	527	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1272	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	528	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		529	#ifndef _WIN32
1273	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	530	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		531	#endif
		532	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		533	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		534	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		535	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1274		536
1275	create_pipe ();	537	create_respipe ();
1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	538
		539	if (eio_init (want_poll, done_poll) < 0)
		540	croak ("IO::AIO: unable to initialise eio library");
		541
		542	/* atfork child called in fifo order, so before eio's handler */
		543	X_THREAD_ATFORK (0, 0, atfork_child);
1277	}	544	}
1278		545
1279	void	546	void
1280	max_poll_reqs (int nreqs)	547	max_poll_reqs (int nreqs)
1281	PROTOTYPE: $	548	PROTOTYPE: $
1282	CODE:	549	CODE:
1283	max_poll_reqs = nreqs;	550	eio_set_max_poll_reqs (nreqs);
1284		551
1285	void	552	void
1286	max_poll_time (double nseconds)	553	max_poll_time (double nseconds)
1287	PROTOTYPE: $	554	PROTOTYPE: $
1288	CODE:	555	CODE:
1289	max_poll_time = nseconds * AIO_TICKS;	556	eio_set_max_poll_time (nseconds);
1290		557
1291	void	558	void
1292	min_parallel (int nthreads)	559	min_parallel (int nthreads)
1293	PROTOTYPE: $	560	PROTOTYPE: $
		561	CODE:
		562	eio_set_min_parallel (nthreads);
1294		563
1295	void	564	void
1296	max_parallel (int nthreads)	565	max_parallel (int nthreads)
1297	PROTOTYPE: $	566	PROTOTYPE: $
		567	CODE:
		568	eio_set_max_parallel (nthreads);
1298		569
1299	void	570	void
1300	max_idle (int nthreads)	571	max_idle (int nthreads)
1301	PROTOTYPE: $	572	PROTOTYPE: $
1302	CODE:	573	CODE:
1303	set_max_idle (nthreads);	574	eio_set_max_idle (nthreads);
1304		575
1305	int	576	void
1306	max_outstanding (int maxreqs)	577	max_outstanding (int maxreqs)
1307	PROTOTYPE: $	578	PROTOTYPE: $
1308	CODE:	579	CODE:
1309	RETVAL = max_outstanding;
1310	max_outstanding = maxreqs;	580	max_outstanding = maxreqs;
1311	OUTPUT:
1312	RETVAL
1313		581
1314	void	582	void
1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	583	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1316	SV8 * pathname
1317	int flags
1318	int mode
1319	SV * callback
1320	PROTOTYPE: $$$;$	584	PROTOTYPE: $$$;$
1321	PPCODE:	585	PPCODE:
1322	{	586	{
1323	dREQ;	587	dREQ;
1324		588
1325	req->type = REQ_OPEN;	589	req->type = EIO_OPEN;
1326	req->sv1 = newSVsv (pathname);	590	req->sv1 = newSVsv (pathname);
1327	req->ptr1 = SvPVbyte_nolen (req->sv1);	591	req->ptr1 = SvPVbyte_nolen (req->sv1);
1328	req->int1 = flags;	592	req->int1 = flags;
1329	req->mode = mode;	593	req->int2 = mode;
1330		594
1331	REQ_SEND;	595	REQ_SEND;
1332	}	596	}
1333		597
1334	void	598	void
1335	aio_close (fh,callback=&PL_sv_undef)	599	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1336	SV * fh
1337	SV * callback
1338	PROTOTYPE: $;$	600	PROTOTYPE: $;$
1339	ALIAS:	601	ALIAS:
1340	aio_close = REQ_CLOSE
1341	aio_fsync = REQ_FSYNC	602	aio_fsync = EIO_FSYNC
1342	aio_fdatasync = REQ_FDATASYNC	603	aio_fdatasync = EIO_FDATASYNC
1343	PPCODE:	604	PPCODE:
1344	{	605	{
		606	int fd = extract_fd (fh, 0);
1345	dREQ;	607	dREQ;
1346		608
1347	req->type = ix;	609	req->type = ix;
1348	req->fh = newSVsv (fh);	610	req->sv1 = newSVsv (fh);
1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	611	req->int1 = fd;
1350		612
1351	REQ_SEND (req);	613	REQ_SEND (req);
1352	}	614	}
1353		615
1354	void	616	void
		617	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		618	PROTOTYPE: $$$$;$
		619	PPCODE:
		620	{
		621	int fd = extract_fd (fh, 0);
		622	dREQ;
		623
		624	req->type = EIO_SYNC_FILE_RANGE;
		625	req->sv1 = newSVsv (fh);
		626	req->int1 = fd;
		627	req->offs = SvVAL64 (offset);
		628	req->size = SvVAL64 (nbytes);
		629	req->int2 = flags;
		630
		631	REQ_SEND (req);
		632	}
		633
		634	void
		635	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		636	PROTOTYPE: $;$
		637	PPCODE:
		638	{
		639	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		640	int fd = extract_fd (fh, 0);
		641	dREQ;
		642
		643	if (close_pipe < 0)
		644	{
		645	int pipefd [2];
		646
		647	if (pipe (pipefd) < 0
		648	|| close (pipefd [1]) < 0
		649	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		650	abort (); /*D*/
		651
		652	close_pipe = pipefd [0];
		653	}
		654
		655	req->type = EIO_DUP2;
		656	req->int1 = close_pipe;
		657	req->sv2 = newSVsv (fh);
		658	req->int2 = fd;
		659
		660	REQ_SEND (req);
		661	}
		662
		663	void
1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	664	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1356	SV * fh
1357	UV offset
1358	UV length
1359	SV8 * data
1360	UV dataoffset
1361	SV * callback
1362	ALIAS:	665	ALIAS:
1363	aio_read = REQ_READ	666	aio_read = EIO_READ
1364	aio_write = REQ_WRITE	667	aio_write = EIO_WRITE
1365	PROTOTYPE: $$$$$;$	668	PROTOTYPE: $$$$$;$
1366	PPCODE:	669	PPCODE:
1367	{	670	{
1368	STRLEN svlen;	671	STRLEN svlen;
1369	char *svptr = SvPVbyte (data, svlen);	672	char *svptr = SvPVbyte (data, svlen);
		673	UV len = SvUV (length);
		674	int fd;
		675
		676	if (SvTYPE (data) > SVt_PVMG)
		677	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
1370		678
1371	SvUPGRADE (data, SVt_PV);	679	SvUPGRADE (data, SVt_PV);
1372	SvPOK_on (data);	680	SvPOK_only (data);
1373		681
1374	if (dataoffset < 0)	682	if (dataoffset < 0)
1375	dataoffset += svlen;	683	dataoffset += svlen;
1376		684
1377	if (dataoffset < 0 || dataoffset > svlen)	685	if (dataoffset < 0 || dataoffset > svlen)
1378	croak ("data offset outside of string");	686	croak ("dataoffset outside of data scalar");
1379		687
1380	if (ix == REQ_WRITE)	688	if (ix == EIO_WRITE)
1381	{	689	{
1382	/* write: check length and adjust. */	690	/* write: check length and adjust. */
1383	if (length < 0 || length + dataoffset > svlen)	691	if (!SvOK (length) || len + dataoffset > svlen)
1384	length = svlen - dataoffset;	692	len = svlen - dataoffset;
1385	}	693	}
1386	else	694	else
1387	{	695	{
1388	/* read: grow scalar as necessary */	696	/* read: grow scalar as necessary */
1389	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
1390	}	698	}
1391		699
1392	if (length < 0)	700	if (len < 0)
1393	croak ("length must not be negative");	701	croak ("length must not be negative");
		702
		703	fd = extract_fd (fh, ix == EIO_WRITE);
1394		704
1395	{	705	{
1396	dREQ;	706	dREQ;
1397		707
1398	req->type = ix;	708	req->type = ix;
1399	req->fh = newSVsv (fh);	709	req->sv1 = newSVsv (fh);
1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	710	req->int1 = fd;
1401	: IoOFP (sv_2io (fh)));	711	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1402	req->offs = offset;
1403	req->size = length;	712	req->size = len;
1404	req->sv1 = SvREFCNT_inc (data);	713	req->sv2 = SvREFCNT_inc (data);
1405	req->ptr1 = (char *)svptr + dataoffset;	714	req->ptr2 = (char *)svptr + dataoffset;
1406	req->stroffset = dataoffset;	715	req->stroffset = dataoffset;
1407		716
1408	if (!SvREADONLY (data))	717	if (!SvREADONLY (data))
1409	{	718	{
1410	SvREADONLY_on (data);	719	SvREADONLY_on (data);
1411	req->flags |= FLAG_SV1_RO_OFF;	720	req->flags |= FLAG_SV2_RO_OFF;
1412	}	721	}
1413		722
1414	REQ_SEND;	723	REQ_SEND;
1415	}	724	}
1416	}	725	}
1417		726
1418	void	727	void
1419	aio_readlink (path,callback=&PL_sv_undef)	728	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1420	SV8 * path
1421	SV * callback
1422	PROTOTYPE: $$;$	729	PROTOTYPE: $$;$
1423	PPCODE:	730	PPCODE:
1424	{	731	{
1425	SV *data;	732	SV *data;
1426	dREQ;	733	dREQ;
1427		734
1428	data = newSV (NAME_MAX);
1429	SvPOK_on (data);
1430
1431	req->type = REQ_READLINK;	735	req->type = EIO_READLINK;
1432	req->fh = newSVsv (path);	736	req->sv1 = newSVsv (path);
1433	req->ptr2 = SvPVbyte_nolen (req->fh);	737	req->ptr1 = SvPVbyte_nolen (req->sv1);
1434	req->sv1 = data;
1435	req->ptr1 = SvPVbyte_nolen (data);
1436		738
1437	REQ_SEND;	739	REQ_SEND;
1438	}	740	}
1439		741
1440	void	742	void
1441	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	743	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1442	SV * out_fh
1443	SV * in_fh
1444	UV in_offset
1445	UV length
1446	SV * callback
1447	PROTOTYPE: $$$$;$	744	PROTOTYPE: $$$$;$
1448	PPCODE:	745	PPCODE:
1449	{	746	{
		747	int ifd = extract_fd (in_fh , 0);
		748	int ofd = extract_fd (out_fh, 0);
1450	dREQ;	749	dREQ;
1451		750
1452	req->type = REQ_SENDFILE;	751	req->type = EIO_SENDFILE;
1453	req->fh = newSVsv (out_fh);	752	req->sv1 = newSVsv (out_fh);
1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	753	req->int1 = ofd;
1455	req->sv2 = newSVsv (in_fh);	754	req->sv2 = newSVsv (in_fh);
1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	755	req->int2 = ifd;
1457	req->offs = in_offset;	756	req->offs = SvVAL64 (in_offset);
1458	req->size = length;	757	req->size = length;
1459		758
1460	REQ_SEND;	759	REQ_SEND;
1461	}	760	}
1462		761
1463	void	762	void
1464	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	763	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1465	SV * fh
1466	UV offset
1467	IV length
1468	SV * callback
1469	PROTOTYPE: $$$;$	764	PROTOTYPE: $$$;$
1470	PPCODE:	765	PPCODE:
1471	{	766	{
		767	int fd = extract_fd (fh, 0);
1472	dREQ;	768	dREQ;
1473		769
1474	req->type = REQ_READAHEAD;	770	req->type = EIO_READAHEAD;
1475	req->fh = newSVsv (fh);	771	req->sv1 = newSVsv (fh);
1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	772	req->int1 = fd;
1477	req->offs = offset;	773	req->offs = SvVAL64 (offset);
1478	req->size = length;	774	req->size = length;
1479		775
1480	REQ_SEND;	776	REQ_SEND;
1481	}	777	}
1482		778
1483	void	779	void
1484	aio_stat (fh_or_path,callback=&PL_sv_undef)	780	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1485	SV8 * fh_or_path
1486	SV * callback
1487	ALIAS:	781	ALIAS:
1488	aio_stat = REQ_STAT	782	aio_stat = EIO_STAT
1489	aio_lstat = REQ_LSTAT	783	aio_lstat = EIO_LSTAT
1490	PPCODE:	784	PPCODE:
1491	{	785	{
1492	dREQ;	786	dREQ;
1493		787
1494	req->ptr2 = malloc (sizeof (Stat_t));	788	req->sv1 = newSVsv (fh_or_path);
1495	if (!req->ptr2)
1496	{
1497	req_free (req);
1498	croak ("out of memory during aio_stat statdata allocation");
1499	}
1500		789
1501	req->flags |= FLAG_PTR2_FREE;	790	if (SvPOK (req->sv1))
1502
1503	if (SvPOK (fh_or_path))
1504	{	791	{
1505	req->type = ix;	792	req->type = ix;
1506	req->sv1 = newSVsv (fh_or_path);
1507	req->ptr1 = SvPVbyte_nolen (req->sv1);	793	req->ptr1 = SvPVbyte_nolen (req->sv1);
1508	}	794	}
1509	else	795	else
1510	{	796	{
1511	req->type = REQ_FSTAT;	797	req->type = EIO_FSTAT;
1512	req->fh = newSVsv (fh_or_path);
1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1514	}	799	}
1515		800
1516	REQ_SEND;	801	REQ_SEND;
1517	}	802	}
1518		803
1519	void	804	void
		805	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		811	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
		815	{
		816	req->type = EIO_UTIME;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FUTIME;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
		824
		825	REQ_SEND;
		826	}
		827
		828	void
		829	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		830	PPCODE:
		831	{
		832	dREQ;
		833
		834	req->sv1 = newSVsv (fh_or_path);
		835	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		836
		837	if (SvPOK (req->sv1))
		838	{
		839	req->type = EIO_TRUNCATE;
		840	req->ptr1 = SvPVbyte_nolen (req->sv1);
		841	}
		842	else
		843	{
		844	req->type = EIO_FTRUNCATE;
		845	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		846	}
		847
		848	REQ_SEND;
		849	}
		850
		851	void
		852	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		853	ALIAS:
		854	aio_chmod = EIO_CHMOD
		855	aio_mkdir = EIO_MKDIR
		856	PPCODE:
		857	{
		858	dREQ;
		859
		860	req->int2 = mode;
		861	req->sv1 = newSVsv (fh_or_path);
		862
		863	if (SvPOK (req->sv1))
		864	{
		865	req->type = ix;
		866	req->ptr1 = SvPVbyte_nolen (req->sv1);
		867	}
		868	else
		869	{
		870	req->type = EIO_FCHMOD;
		871	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		872	}
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		879	PPCODE:
		880	{
		881	dREQ;
		882
		883	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		884	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		885	req->sv1 = newSVsv (fh_or_path);
		886
		887	if (SvPOK (req->sv1))
		888	{
		889	req->type = EIO_CHOWN;
		890	req->ptr1 = SvPVbyte_nolen (req->sv1);
		891	}
		892	else
		893	{
		894	req->type = EIO_FCHOWN;
		895	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		896	}
		897
		898	REQ_SEND;
		899	}
		900
		901	void
1520	aio_unlink (pathname,callback=&PL_sv_undef)	902	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1521	SV8 * pathname
1522	SV * callback
1523	ALIAS:	903	ALIAS:
1524	aio_unlink = REQ_UNLINK	904	aio_unlink = EIO_UNLINK
1525	aio_rmdir = REQ_RMDIR	905	aio_rmdir = EIO_RMDIR
1526	aio_readdir = REQ_READDIR	906	aio_readdir = EIO_READDIR
1527	PPCODE:	907	PPCODE:
1528	{	908	{
1529	dREQ;	909	dREQ;
1530		910
1531	req->type = ix;	911	req->type = ix;
…		…
1534		914
1535	REQ_SEND;	915	REQ_SEND;
1536	}	916	}
1537		917
1538	void	918	void
1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)	919	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1540	SV8 * oldpath
1541	SV8 * newpath
1542	SV * callback
1543	ALIAS:	920	ALIAS:
1544	aio_link = REQ_LINK	921	aio_link = EIO_LINK
1545	aio_symlink = REQ_SYMLINK	922	aio_symlink = EIO_SYMLINK
1546	aio_rename = REQ_RENAME	923	aio_rename = EIO_RENAME
1547	PPCODE:	924	PPCODE:
1548	{	925	{
1549	dREQ;	926	dREQ;
1550		927
1551	req->type = ix;	928	req->type = ix;
1552	req->fh = newSVsv (oldpath);	929	req->sv1 = newSVsv (oldpath);
1553	req->ptr2 = SvPVbyte_nolen (req->fh);
1554	req->sv1 = newSVsv (newpath);
1555	req->ptr1 = SvPVbyte_nolen (req->sv1);	930	req->ptr1 = SvPVbyte_nolen (req->sv1);
		931	req->sv2 = newSVsv (newpath);
		932	req->ptr2 = SvPVbyte_nolen (req->sv2);
1556		933
1557	REQ_SEND;	934	REQ_SEND;
1558	}	935	}
1559		936
1560	void	937	void
1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	938	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1562	SV8 * pathname
1563	SV * callback
1564	UV mode
1565	UV dev
1566	PPCODE:	939	PPCODE:
1567	{	940	{
1568	dREQ;	941	dREQ;
1569		942
1570	req->type = REQ_MKNOD;	943	req->type = EIO_MKNOD;
1571	req->sv1 = newSVsv (pathname);	944	req->sv1 = newSVsv (pathname);
1572	req->ptr1 = SvPVbyte_nolen (req->sv1);	945	req->ptr1 = SvPVbyte_nolen (req->sv1);
1573	req->mode = (mode_t)mode;	946	req->int2 = (mode_t)mode;
1574	req->offs = dev;	947	req->offs = dev;
1575		948
1576	REQ_SEND;	949	REQ_SEND;
1577	}	950	}
1578		951
1579	void	952	void
1580	aio_busy (delay,callback=&PL_sv_undef)	953	aio_busy (double delay, SV *callback=&PL_sv_undef)
1581	double delay
1582	SV * callback
1583	PPCODE:	954	PPCODE:
1584	{	955	{
1585	dREQ;	956	dREQ;
1586		957
1587	req->type = REQ_BUSY;	958	req->type = EIO_BUSY;
1588	req->int1 = delay < 0. ? 0 : delay;	959	req->nv1 = delay < 0. ? 0. : delay;
1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1590		960
1591	REQ_SEND;	961	REQ_SEND;
1592	}	962	}
1593		963
1594	void	964	void
1595	aio_group (callback=&PL_sv_undef)	965	aio_group (SV *callback=&PL_sv_undef)
1596	SV * callback
1597	PROTOTYPE: ;$	966	PROTOTYPE: ;$
1598	PPCODE:	967	PPCODE:
1599	{	968	{
1600	dREQ;	969	dREQ;
1601		970
1602	req->type = REQ_GROUP;	971	req->type = EIO_GROUP;
1603		972
1604	req_send (req);	973	req_submit (req);
1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));	974	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1606	}	975	}
1607		976
1608	void	977	void
1609	aio_nop (callback=&PL_sv_undef)	978	aio_nop (SV *callback=&PL_sv_undef)
1610	SV * callback	979	ALIAS:
		980	aio_nop = EIO_NOP
		981	aio_sync = EIO_SYNC
1611	PPCODE:	982	PPCODE:
1612	{	983	{
1613	dREQ;	984	dREQ;
1614		985
1615	req->type = REQ_NOP;	986	req->type = ix;
1616		987
1617	REQ_SEND;	988	REQ_SEND;
1618	}	989	}
1619		990
1620	int	991	int
1621	aioreq_pri (int pri = 0)	992	aioreq_pri (int pri = 0)
1622	PROTOTYPE: ;$	993	PROTOTYPE: ;$
1623	CODE:	994	CODE:
1624	RETVAL = next_pri - PRI_BIAS;	995	RETVAL = next_pri;
1625	if (items > 0)	996	if (items > 0)
1626	{	997	{
1627	if (pri < PRI_MIN) pri = PRI_MIN;	998	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1628	if (pri > PRI_MAX) pri = PRI_MAX;	999	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1629	next_pri = pri + PRI_BIAS;	1000	next_pri = pri;
1630	}	1001	}
1631	OUTPUT:	1002	OUTPUT:
1632	RETVAL	1003	RETVAL
1633		1004
1634	void	1005	void
1635	aioreq_nice (int nice = 0)	1006	aioreq_nice (int nice = 0)
1636	CODE:	1007	CODE:
1637	nice = next_pri - nice;	1008	nice = next_pri - nice;
1638	if (nice < PRI_MIN) nice = PRI_MIN;	1009	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1639	if (nice > PRI_MAX) nice = PRI_MAX;	1010	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1640	next_pri = nice + PRI_BIAS;	1011	next_pri = nice;
1641		1012
1642	void	1013	void
1643	flush ()	1014	flush ()
1644	PROTOTYPE:	1015	PROTOTYPE:
1645	CODE:	1016	CODE:
1646	while (nreqs)	1017	while (eio_nreqs ())
1647	{	1018	{
1648	poll_wait ();	1019	poll_wait ();
1649	poll_cb ();	1020	poll_cb ();
1650	}	1021	}
1651		1022
1652	int	1023	int
1653	poll()	1024	poll()
1654	PROTOTYPE:	1025	PROTOTYPE:
1655	CODE:	1026	CODE:
1656	if (nreqs)
1657	{
1658	poll_wait ();	1027	poll_wait ();
1659	RETVAL = poll_cb ();	1028	RETVAL = poll_cb ();
1660	}
1661	else
1662	RETVAL = 0;
1663	OUTPUT:	1029	OUTPUT:
1664	RETVAL	1030	RETVAL
1665		1031
1666	int	1032	int
1667	poll_fileno()	1033	poll_fileno()
…		…
1681		1047
1682	void	1048	void
1683	poll_wait()	1049	poll_wait()
1684	PROTOTYPE:	1050	PROTOTYPE:
1685	CODE:	1051	CODE:
1686	if (nreqs)
1687	poll_wait ();	1052	poll_wait ();
1688		1053
1689	int	1054	int
1690	nreqs()	1055	nreqs()
1691	PROTOTYPE:	1056	PROTOTYPE:
1692	CODE:	1057	CODE:
1693	RETVAL = nreqs;	1058	RETVAL = eio_nreqs ();
1694	OUTPUT:	1059	OUTPUT:
1695	RETVAL	1060	RETVAL
1696		1061
1697	int	1062	int
1698	nready()	1063	nready()
1699	PROTOTYPE:	1064	PROTOTYPE:
1700	CODE:	1065	CODE:
1701	RETVAL = get_nready ();	1066	RETVAL = eio_nready ();
1702	OUTPUT:	1067	OUTPUT:
1703	RETVAL	1068	RETVAL
1704		1069
1705	int	1070	int
1706	npending()	1071	npending()
1707	PROTOTYPE:	1072	PROTOTYPE:
1708	CODE:	1073	CODE:
1709	RETVAL = get_npending ();	1074	RETVAL = eio_npending ();
1710	OUTPUT:	1075	OUTPUT:
1711	RETVAL	1076	RETVAL
1712		1077
1713	int	1078	int
1714	nthreads()	1079	nthreads()
1715	PROTOTYPE:	1080	PROTOTYPE:
1716	CODE:	1081	CODE:
1717	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1082	RETVAL = eio_nthreads ();
1718	RETVAL = started;
1719	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1720	OUTPUT:	1083	OUTPUT:
1721	RETVAL	1084	RETVAL
1722		1085
		1086	void _on_next_submit (SV *cb)
		1087	CODE:
		1088	SvREFCNT_dec (on_next_submit);
		1089	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1090
1723	PROTOTYPES: DISABLE	1091	PROTOTYPES: DISABLE
1724		1092
1725	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1093	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1726		1094
1727	void	1095	void
1728	cancel (aio_req_ornot req)	1096	cancel (aio_req_ornot req)
1729	CODE:	1097	CODE:
1730	req_cancel (req);	1098	eio_cancel (req);
1731		1099
1732	void	1100	void
1733	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1101	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1734	CODE:	1102	PPCODE:
		1103	{
		1104	if (GIMME_V != G_VOID)
		1105	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1106
		1107	if (items > 1)
		1108	{
		1109	SV *cb_cv = get_cb (callback);
		1110
1735	SvREFCNT_dec (req->callback);	1111	SvREFCNT_dec (req->callback);
1736	req->callback = newSVsv (callback);	1112	req->callback = SvREFCNT_inc (cb_cv);
		1113	}
		1114	}
1737		1115
1738	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1116	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1739		1117
1740	void	1118	void
1741	add (aio_req grp, ...)	1119	add (aio_req grp, ...)
1742	PPCODE:	1120	PPCODE:
1743	{	1121	{
1744	int i;	1122	int i;
1745	aio_req req;
1746		1123
1747	if (grp->int1 == 2)	1124	if (grp->int1 == 2)
1748	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1125	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1749		1126
1750	for (i = 1; i < items; ++i )	1127	for (i = 1; i < items; ++i )
1751	{	1128	{
		1129	aio_req req;
		1130
1752	if (GIMME_V != G_VOID)	1131	if (GIMME_V != G_VOID)
1753	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1132	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1754		1133
1755	req = SvAIO_REQ (ST (i));	1134	req = SvAIO_REQ (ST (i));
1756		1135
1757	if (req)	1136	if (req)
1758	{	1137	eio_grp_add (grp, req);
1759	++grp->size;
1760	req->grp = grp;
1761
1762	req->grp_prev = 0;
1763	req->grp_next = grp->grp_first;
1764
1765	if (grp->grp_first)
1766	grp->grp_first->grp_prev = req;
1767
1768	grp->grp_first = req;
1769	}
1770	}	1138	}
1771	}	1139	}
1772		1140
1773	void	1141	void
1774	cancel_subs (aio_req_ornot req)	1142	cancel_subs (aio_req_ornot req)
…		…
1799	grp->errorno = errorno;	1167	grp->errorno = errorno;
1800		1168
1801	void	1169	void
1802	limit (aio_req grp, int limit)	1170	limit (aio_req grp, int limit)
1803	CODE:	1171	CODE:
1804	grp->int2 = limit;	1172	eio_grp_limit (grp, limit);
1805	aio_grp_feed (grp);
1806		1173
1807	void	1174	void
1808	feed (aio_req grp, SV *callback=&PL_sv_undef)	1175	feed (aio_req grp, SV *callback=&PL_sv_undef)
1809	CODE:	1176	CODE:
1810	{	1177	{
1811	SvREFCNT_dec (grp->sv2);	1178	SvREFCNT_dec (grp->sv2);
1812	grp->sv2 = newSVsv (callback);	1179	grp->sv2 = newSVsv (callback);
		1180	grp->feed = aio_grp_feed;
1813		1181
1814	if (grp->int2 <= 0)	1182	if (grp->int2 <= 0)
1815	grp->int2 = 2;	1183	grp->int2 = 2;
1816		1184
1817	aio_grp_feed (grp);	1185	eio_grp_limit (grp, grp->int2);
1818	}	1186	}
1819		1187

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