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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.85 by root, Sat Oct 28 23:32:29 2006 UTC vs.
Revision 1.138 by root, Tue Apr 21 20:06:05 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	99	typedef SV SV8; /* byte-sv, used for argument-checking */
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	enum {
93	REQ_QUIT,
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	};
105		100
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		103
109	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;	105	SV *callback; \
114	SV *fh, *fh2;	106	SV *sv1, *sv2; \
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;	107	STRLEN stroffset; \
122	int type;	108	SV *self;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126		109
127	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
128	unsigned char pri;
129		111
130	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
132	} 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)
133		118
134	enum {	119	enum {
135	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
136	};	121	};
137		122
		123	#include "libeio/eio.c"
		124
138	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
140		127
141	enum {	128	static SV *on_next_submit;
142	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	130	static int max_outstanding;
144		131
145	DEFAULT_PRI = 0,	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		133
150	#define AIO_TICKS ((1000000 + 1023) >> 10)
151
152	static unsigned int max_poll_time = 0;
153	static unsigned int max_poll_reqs = 0;
154
155	/* calculcate time difference in ~1/AIO_TICKS of a second */
156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
157	{
158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
160	}
161
162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
163
164	static unsigned int started, idle, wanted;
165
166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
168	#else
169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
170	#endif
171
172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
174
175	/* worker threads management */
176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
177
178	typedef struct worker {
179	/* locked by wrklock */
180	struct worker *prev, *next;
181
182	pthread_t tid;
183
184	/* locked by reslock, reqlock or wrklock */
185	aio_req req; /* currently processed request */
186	void *dbuf;
187	DIR *dirp;
188	} worker;
189
190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
191
192	static void worker_clear (worker *wrk)
193	{
194	if (wrk->dirp)
195	{
196	closedir (wrk->dirp);
197	wrk->dirp = 0;
198	}
199
200	if (wrk->dbuf)
201	{
202	free (wrk->dbuf);
203	wrk->dbuf = 0;
204	}
205	}
206
207	static void worker_free (worker *wrk)
208	{
209	wrk->next->prev = wrk->prev;
210	wrk->prev->next = wrk->next;
211
212	free (wrk);
213	}
214
215	static volatile unsigned int nreqs, nready, npending;
216	static volatile unsigned int max_idle = 4;
217	static volatile unsigned int max_outstanding = 0xffffffff;
218	static int respipe [2];
219
220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
221	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
223
224	#if WORDACCESS_UNSAFE
225
226	static unsigned int get_nready ()
227	{
228	unsigned int retval;
229
230	LOCK (reqlock);
231	retval = nready;
232	UNLOCK (reqlock);
233
234	return retval;
235	}
236
237	static unsigned int get_npending ()
238	{
239	unsigned int retval;
240
241	LOCK (reslock);
242	retval = npending;
243	UNLOCK (reslock);
244
245	return retval;
246	}
247
248	static unsigned int get_nthreads ()
249	{
250	unsigned int retval;
251
252	LOCK (wrklock);
253	retval = started;
254	UNLOCK (wrklock);
255
256	return retval;
257	}
258
259	#else
260
261	# define get_nready() nready
262	# define get_npending() npending
263	# define get_nthreads() started
264
265	#endif
266
267	/*
268	* a somewhat faster data structure might be nice, but
269	* with 8 priorities this actually needs <20 insns
270	* per shift, the most expensive operation.
271	*/
272	typedef struct {
273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
274	int size;
275	} reqq;
276
277	static reqq req_queue;
278	static reqq res_queue;
279
280	int reqq_push (reqq *q, aio_req req)
281	{
282	int pri = req->pri;
283	req->next = 0;
284
285	if (q->qe[pri])
286	{
287	q->qe[pri]->next = req;
288	q->qe[pri] = req;
289	}
290	else
291	q->qe[pri] = q->qs[pri] = req;
292
293	return q->size++;
294	}
295
296	aio_req reqq_shift (reqq *q)
297	{
298	int pri;
299
300	if (!q->size)
301	return 0;
302
303	--q->size;
304
305	for (pri = NUM_PRI; pri--; )
306	{
307	aio_req req = q->qs[pri];
308
309	if (req)
310	{
311	if (!(q->qs[pri] = req->next))
312	q->qe[pri] = 0;
313
314	return req;
315	}
316	}
317
318	abort ();
319	}
320
321	static int poll_cb ();
322	static void req_invoke (aio_req req);
323	static void req_free (aio_req req);	134	static void req_destroy (aio_req req);
324	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	}
325		150
326	/* must be called at most once */	151	/* must be called at most once */
327	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
328	{	153	{
329	if (!req->self)	154	if (!req->self)
…		…
347	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
348	}	173	}
349		174
350	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
351	{	176	{
352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
353	{	178	{
354	int old_len = grp->length;
355
356	if (grp->fh2 && SvOK (grp->fh2))
357	{
358	dSP;	179	dSP;
359		180
360	ENTER;	181	ENTER;
361	SAVETMPS;	182	SAVETMPS;
362	PUSHMARK (SP);	183	PUSHMARK (SP);
363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
364	PUTBACK;	185	PUTBACK;
365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
366	SPAGAIN;	187	SPAGAIN;
367	FREETMPS;	188	FREETMPS;
368	LEAVE;	189	LEAVE;
369	}
370
371	/* stop if no progress has been made */
372	if (old_len == grp->length)
373	{
374	SvREFCNT_dec (grp->fh2);
375	grp->fh2 = 0;
376	break;
377	}
378	}	190	}
379	}	191	}
380		192
381	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
382	{	194	{
383	--grp->length;	195	eio_submit (req);
384		196
385	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
386	aio_grp_feed (grp);
387
388	/* finish, if done */
389	if (!grp->length && grp->fd)
390	{	198	{
391	req_invoke (grp);	199	dSP;
392	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);
393	}	207	}
394	}	208	}
395		209
396	static void req_invoke (aio_req req)	210	static int req_invoke (eio_req *req)
397	{	211	{
398	dSP;	212	dSP;
399		213
400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
401	{	218	{
402	ENTER;	219	ENTER;
403	SAVETMPS;	220	SAVETMPS;
404	PUSHMARK (SP);	221	PUSHMARK (SP);
405	EXTEND (SP, 1);	222	EXTEND (SP, 1);
406		223
407	switch (req->type)	224	switch (req->type)
408	{	225	{
409	case REQ_READDIR:	226	case EIO_READDIR:
410	{	227	{
411	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
412		229
413	if (req->result >= 0)	230	if (req->result >= 0)
414	{	231	{
415	int i;	232	int i;
416	char *buf = req->data2ptr;	233	char *buf = req->ptr2;
417	AV *av = newAV ();	234	AV *av = newAV ();
418		235
419	av_extend (av, req->result - 1);	236	av_extend (av, req->result - 1);
420		237
421	for (i = 0; i < req->result; ++i)	238	for (i = 0; i < req->result; ++i)
…		…
431		248
432	PUSHs (rv);	249	PUSHs (rv);
433	}	250	}
434	break;	251	break;
435		252
436	case REQ_OPEN:	253	case EIO_OPEN:
437	{	254	{
438	/* convert fd to fh */	255	/* convert fd to fh */
439	SV *fh;	256	SV *fh = &PL_sv_undef;
440		257
441	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
442	PUTBACK;	259	{
443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
444	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);
445		267
446	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	);
447		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
448	PUSHMARK (SP);	280	PUSHs (fh);
449	XPUSHs (sv_2mortal (fh));
450	}	281	}
451	break;	282	break;
452		283
453	case REQ_GROUP:	284	case EIO_GROUP:
454	req->fd = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
455		286
456	if (req->data)	287	if (req->sv1)
457	{	288	{
458	int i;	289	int i;
459	AV *av = (AV *)req->data;	290	AV *av = (AV *)req->sv1;
460		291
461	EXTEND (SP, AvFILL (av) + 1);	292	EXTEND (SP, AvFILL (av) + 1);
462	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
463	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
464	}	295	}
465	break;	296	break;
466		297
467	case REQ_NOP:	298	case EIO_NOP:
468	case REQ_BUSY:	299	case EIO_BUSY:
469	break;	300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
470		330
471	default:	331	default:
472	PUSHs (sv_2mortal (newSViv (req->result)));	332	PUSHs (sv_2mortal (newSViv (req->result)));
473	break;	333	break;
474	}	334	}
475		335
476	errno = req->errorno;	336	errno = req->errorno;
477		337
478	PUTBACK;	338	PUTBACK;
479	call_sv (req->callback, G_VOID | G_EVAL);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
480	SPAGAIN;	340	SPAGAIN;
481		341
482	FREETMPS;	342	FREETMPS;
483	LEAVE;	343	LEAVE;
		344
		345	PUTBACK;
484	}	346	}
485		347
486	if (req->grp)	348	return !!SvTRUE (ERRSV);
487	{
488	aio_req grp = req->grp;
489
490	/* unlink request */
491	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
492	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
493
494	if (grp->grp_first == req)
495	grp->grp_first = req->grp_next;
496
497	aio_grp_dec (grp);
498	}
499
500	if (SvTRUE (ERRSV))
501	{
502	req_free (req);
503	croak (0);
504	}
505	}	349	}
506		350
507	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
508	{	352	{
509	if (req->self)	353	if (req->self)
510	{	354	{
511	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
512	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
513	}	357	}
514		358
515	SvREFCNT_dec (req->data);
516	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
517	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
518	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
519	Safefree (req->statdata);
520
521	if (req->type == REQ_READDIR)
522	free (req->data2ptr);
523		362
524	Safefree (req);	363	Safefree (req);
525	}	364	}
526		365
527	static void req_cancel_subs (aio_req grp)	366	static void req_cancel_subs (aio_req grp)
528	{	367	{
529	aio_req sub;	368	aio_req sub;
530		369
531	if (grp->type != REQ_GROUP)	370	if (grp->type != EIO_GROUP)
532	return;	371	return;
533		372
534	SvREFCNT_dec (grp->fh2);	373	SvREFCNT_dec (grp->sv2);
535	grp->fh2 = 0;	374	grp->sv2 = 0;
536		375
537	for (sub = grp->grp_first; sub; sub = sub->grp_next)	376	eio_grp_cancel (grp);
538	req_cancel (sub);
539	}	377	}
540		378
541	static void req_cancel (aio_req req)	379	#ifdef USE_SOCKETS_AS_HANDLES
542	{	380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
543	req->flags |= FLAG_CANCELLED;	381	#else
544		382	# define TO_SOCKET(x) (x)
545	req_cancel_subs (req);
546	}
547
548	static void *aio_proc(void *arg);
549
550	static void start_thread (void)
551	{
552	sigset_t fullsigset, oldsigset;
553	pthread_attr_t attr;
554
555	worker *wrk = calloc (1, sizeof (worker));
556
557	if (!wrk)
558	croak ("unable to allocate worker thread data");
559
560	pthread_attr_init (&attr);
561	pthread_attr_setstacksize (&attr, STACKSIZE);
562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
563	#ifdef PTHREAD_SCOPE_PROCESS
564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
565	#endif	383	#endif
566		384
567	sigfillset (&fullsigset);	385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
568		389
569	LOCK (wrklock);	390	if (respipe [1] >= 0)
570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	391	respipe_close (TO_SOCKET (respipe [1]));
571		392
572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
573	{	401	{
574	wrk->prev = &wrk_first;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
575	wrk->next = wrk_first.next;	403	croak ("unable to initialize result pipe(2)");
576	wrk_first.next->prev = wrk;	404
577	wrk_first.next = wrk;	405	respipe_close (respipe [0]);
578	++started;	406	respipe [0] = old_readfd;
579	}	407	}
580	else
581	free (wrk);
582		408
583	sigprocmask (SIG_SETMASK, &oldsigset, 0);	409	#ifdef _WIN32
584	UNLOCK (wrklock);	410	int arg = 1;
585	}	411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
586		418
587	static void maybe_start_thread ()	419	respipe_osf [0] = TO_SOCKET (respipe [0]);
588	{	420	respipe_osf [1] = TO_SOCKET (respipe [1]);
589	if (get_nthreads () >= wanted)
590	return;
591
592	/* todo: maybe use idle here, but might be less exact */
593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
594	return;
595
596	start_thread ();
597	}	421	}
598		422
599	static void req_send (aio_req req)
600	{
601	++nreqs;
602
603	LOCK (reqlock);
604	++nready;
605	reqq_push (&req_queue, req);
606	pthread_cond_signal (&reqwait);
607	UNLOCK (reqlock);
608
609	maybe_start_thread ();
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	LOCK (reqlock);
622	reqq_push (&req_queue, req);
623	pthread_cond_signal (&reqwait);
624	UNLOCK (reqlock);
625
626	LOCK (wrklock);
627	--started;
628	UNLOCK (wrklock);
629	}
630
631	static void set_max_idle (int nthreads)
632	{
633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
634	max_idle = nthreads <= 0 ? 1 : nthreads;
635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
636	}
637
638	static void min_parallel (int nthreads)
639	{
640	if (wanted < nthreads)
641	wanted = nthreads;
642	}
643
644	static void max_parallel (int nthreads)
645	{
646	if (wanted > nthreads)
647	wanted = nthreads;
648
649	while (started > wanted)
650	end_thread ();
651	}
652
653	static void poll_wait ()	423	static void poll_wait (void)
654	{	424	{
655	fd_set rfd;	425	fd_set rfd;
656		426
657	while (nreqs)	427	while (eio_nreqs ())
658	{	428	{
659	int size;	429	int size;
660	if (WORDACCESS_UNSAFE) LOCK (reslock);	430
		431	X_LOCK (reslock);
661	size = res_queue.size;	432	size = res_queue.size;
662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	433	X_UNLOCK (reslock);
663		434
664	if (size)	435	if (size)
665	return;	436	return;
666		437
667	maybe_start_thread ();	438	etp_maybe_start_thread ();
668		439
669	FD_ZERO(&rfd);	440	FD_ZERO (&rfd);
670	FD_SET(respipe [0], &rfd);	441	FD_SET (respipe [0], &rfd);
671		442
672	select (respipe [0] + 1, &rfd, 0, 0, 0);	443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
673	}	444	}
674	}	445	}
675		446
676	static int poll_cb ()	447	static int poll_cb (void)
677	{	448	{
678	dSP;
679	int count = 0;
680	int maxreqs = max_poll_reqs;
681	int do_croak = 0;
682	struct timeval tv_start, tv_now;
683	aio_req req;
684
685	if (max_poll_time)
686	gettimeofday (&tv_start, 0);
687
688	for (;;)	449	for (;;)
689	{	450	{
690	for (;;)	451	int res = eio_poll ();
691	{
692	maybe_start_thread ();
693		452
694	LOCK (reslock);	453	if (res > 0)
695	req = reqq_shift (&res_queue);
696
697	if (req)
698	{
699	--npending;
700
701	if (!res_queue.size)
702	{
703	/* read any signals sent by the worker threads */
704	char buf [32];
705	while (read (respipe [0], buf, 32) == 32)
706	;
707	}
708	}
709
710	UNLOCK (reslock);
711
712	if (!req)
713	break;
714
715	--nreqs;
716
717	if (req->type == REQ_GROUP && req->length)
718	{
719	req->fd = 1; /* mark request as delayed */
720	continue;
721	}
722	else
723	{
724	if (req->type == REQ_READ)
725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
726
727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
728	SvREADONLY_off (req->data);
729
730	if (req->statdata)
731	{
732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
733	PL_laststatval = req->result;
734	PL_statcache = *(req->statdata);
735	}
736
737	req_invoke (req);
738
739	count++;
740	}
741
742	req_free (req);
743
744	if (maxreqs && !--maxreqs)
745	break;
746
747	if (max_poll_time)
748	{
749	gettimeofday (&tv_now, 0);
750
751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
752	break;
753	}
754	}
755
756	if (nreqs <= max_outstanding)
757	break;	454	croak (0);
		455
		456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
758		458
759	poll_wait ();	459	poll_wait ();
760
761	++maxreqs;
762	}	460	}
763
764	return count;
765	}	461	}
766		462
767	static void create_pipe ()	463	static void atfork_child (void)
768	{	464	{
769	if (pipe (respipe))	465	create_respipe ();
770	croak ("unable to initialize result pipe");
771
772	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
773	croak ("cannot set result pipe to nonblocking mode");
774
775	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
776	croak ("cannot set result pipe to nonblocking mode");
777	}	466	}
778		467
779	/*****************************************************************************/	468	static SV *
780	/* work around various missing functions */	469	get_cb (SV *cb_sv)
781
782	#if !HAVE_PREADWRITE
783	# define pread aio_pread
784	# define pwrite aio_pwrite
785
786	/*
787	* make our pread/pwrite safe against themselves, but not against
788	* normal read/write by using a mutex. slows down execution a lot,
789	* but that's your problem, not mine.
790	*/
791	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
792
793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
794	{	470	{
795	ssize_t res;	471	HV *st;
796	off_t ooffset;	472	GV *gvp;
		473	CV *cv;
797		474
798	LOCK (preadwritelock);	475	if (!SvOK (cb_sv))
799	ooffset = lseek (fd, 0, SEEK_CUR);
800	lseek (fd, offset, SEEK_SET);
801	res = read (fd, buf, count);
802	lseek (fd, ooffset, SEEK_SET);
803	UNLOCK (preadwritelock);
804
805	return res;
806	}
807
808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
809	{
810	ssize_t res;
811	off_t ooffset;
812
813	LOCK (preadwritelock);
814	ooffset = lseek (fd, 0, SEEK_CUR);
815	lseek (fd, offset, SEEK_SET);
816	res = write (fd, buf, count);
817	lseek (fd, offset, SEEK_SET);
818	UNLOCK (preadwritelock);
819
820	return res;
821	}
822	#endif
823
824	#if !HAVE_FDATASYNC
825	# define fdatasync fsync
826	#endif
827
828	#if !HAVE_READAHEAD
829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
830
831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
832	{
833	dBUF;
834
835	while (count > 0)
836	{
837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
838
839	pread (fd, aio_buf, len, offset);
840	offset += len;
841	count -= len;
842	}
843
844	errno = 0;
845	}
846
847	#endif
848
849	#if !HAVE_READDIR_R
850	# define readdir_r aio_readdir_r
851
852	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
853
854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
855	{
856	struct dirent *e;
857	int errorno;
858
859	LOCK (readdirlock);
860
861	e = readdir (dirp);
862	errorno = errno;
863
864	if (e)
865	{
866	*res = ent;
867	strcpy (ent->d_name, e->d_name);
868	}
869	else
870	*res = 0;
871
872	UNLOCK (readdirlock);
873
874	errno = errorno;
875	return e ? 0 : -1;
876	}
877	#endif
878
879	/* sendfile always needs emulation */
880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
881	{
882	ssize_t res;
883
884	if (!count)
885	return 0;	476	return 0;
886		477
887	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
888	# if __linux
889	res = sendfile (ofd, ifd, &offset, count);
890		479
891	# elif __freebsd	480	if (!cv)
892	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
893	* Of course, the freebsd sendfile is a dire hack with no thoughts
894	* wasted on making it similar to other I/O functions.
895	*/
896	{
897	off_t sbytes;
898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
899		482
900	if (res < 0 && sbytes)	483	return (SV *)cv;
901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
902	res = sbytes;
903	}
904
905	# elif __hpux
906	res = sendfile (ofd, ifd, offset, count, 0, 0);
907
908	# elif __solaris
909	{
910	struct sendfilevec vec;
911	size_t sbytes;
912
913	vec.sfv_fd = ifd;
914	vec.sfv_flag = 0;
915	vec.sfv_off = offset;
916	vec.sfv_len = count;
917
918	res = sendfilev (ofd, &vec, 1, &sbytes);
919
920	if (res < 0 && sbytes)
921	res = sbytes;
922	}
923
924	# endif
925	#else
926	res = -1;
927	errno = ENOSYS;
928	#endif
929
930	if (res < 0
931	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
932	#if __solaris
933	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
934	#endif
935	)
936	)
937	{
938	/* emulate sendfile. this is a major pain in the ass */
939	dBUF;
940
941	res = 0;
942
943	while (count)
944	{
945	ssize_t cnt;
946
947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
948
949	if (cnt <= 0)
950	{
951	if (cnt && !res) res = -1;
952	break;
953	}
954
955	cnt = write (ofd, aio_buf, cnt);
956
957	if (cnt <= 0)
958	{
959	if (cnt && !res) res = -1;
960	break;
961	}
962
963	offset += cnt;
964	res += cnt;
965	count -= cnt;
966	}
967	}
968
969	return res;
970	}
971
972	/* read a full directory */
973	static void scandir_ (aio_req req, worker *self)
974	{
975	DIR *dirp;
976	union
977	{
978	struct dirent d;
979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
980	} *u;
981	struct dirent *entp;
982	char *name, *names;
983	int memlen = 4096;
984	int memofs = 0;
985	int res = 0;
986	int errorno;
987
988	LOCK (wrklock);
989	self->dirp = dirp = opendir (req->dataptr);
990	self->dbuf = u = malloc (sizeof (*u));
991	req->data2ptr = names = malloc (memlen);
992	UNLOCK (wrklock);
993
994	if (dirp && u && names)
995	for (;;)
996	{
997	errno = 0;
998	readdir_r (dirp, &u->d, &entp);
999
1000	if (!entp)
1001	break;
1002
1003	name = entp->d_name;
1004
1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1006	{
1007	int len = strlen (name) + 1;
1008
1009	res++;
1010
1011	while (memofs + len > memlen)
1012	{
1013	memlen *= 2;
1014	LOCK (wrklock);
1015	req->data2ptr = names = realloc (names, memlen);
1016	UNLOCK (wrklock);
1017
1018	if (!names)
1019	break;
1020	}
1021
1022	memcpy (names + memofs, name, len);
1023	memofs += len;
1024	}
1025	}
1026
1027	if (errno)
1028	res = -1;
1029
1030	req->result = res;
1031	}
1032
1033	/*****************************************************************************/
1034
1035	static void *aio_proc (void *thr_arg)
1036	{
1037	aio_req req;
1038	struct timespec ts;
1039	worker *self = (worker *)thr_arg;
1040
1041	/* try to distribute timeouts somewhat evenly */
1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1043	* (1000000000UL / 1024UL);
1044
1045	for (;;)
1046	{
1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1048
1049	LOCK (reqlock);
1050
1051	for (;;)
1052	{
1053	self->req = req = reqq_shift (&req_queue);
1054
1055	if (req)
1056	break;
1057
1058	++idle;
1059
1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1061	== ETIMEDOUT)
1062	{
1063	if (idle > max_idle)
1064	{
1065	--idle;
1066	UNLOCK (reqlock);
1067	LOCK (wrklock);
1068	--started;
1069	UNLOCK (wrklock);
1070	goto quit;
1071	}
1072
1073	/* we are allowed to idle, so do so without any timeout */
1074	pthread_cond_wait (&reqwait, &reqlock);
1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1076	}
1077
1078	--idle;
1079	}
1080
1081	--nready;
1082
1083	UNLOCK (reqlock);
1084
1085	errno = 0; /* strictly unnecessary */
1086
1087	if (!(req->flags & FLAG_CANCELLED))
1088	switch (req->type)
1089	{
1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1092
1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1095
1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1099
1100	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1101	case REQ_CLOSE: req->result = close (req->fd); break;
1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1108
1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
1111	case REQ_READDIR: scandir_ (req, self); break;
1112
1113	case REQ_BUSY:
1114	{
1115	struct timeval tv;
1116
1117	tv.tv_sec = req->fd;
1118	tv.tv_usec = req->fd2;
1119
1120	req->result = select (0, 0, 0, 0, &tv);
1121	}
1122
1123	case REQ_GROUP:
1124	case REQ_NOP:
1125	break;
1126
1127	case REQ_QUIT:
1128	goto quit;
1129
1130	default:
1131	req->result = ENOSYS;
1132	break;
1133	}
1134
1135	req->errorno = errno;
1136
1137	LOCK (reslock);
1138
1139	++npending;
1140
1141	if (!reqq_push (&res_queue, req))
1142	/* write a dummy byte to the pipe so fh becomes ready */
1143	write (respipe [1], &respipe, 1);
1144
1145	self->req = 0;
1146	worker_clear (self);
1147
1148	UNLOCK (reslock);
1149	}
1150
1151	quit:
1152	LOCK (wrklock);
1153	worker_free (self);
1154	UNLOCK (wrklock);
1155
1156	return 0;
1157	}
1158
1159	/*****************************************************************************/
1160
1161	static void atfork_prepare (void)
1162	{
1163	LOCK (wrklock);
1164	LOCK (reqlock);
1165	LOCK (reslock);
1166	#if !HAVE_PREADWRITE
1167	LOCK (preadwritelock);
1168	#endif
1169	#if !HAVE_READDIR_R
1170	LOCK (readdirlock);
1171	#endif
1172	}
1173
1174	static void atfork_parent (void)
1175	{
1176	#if !HAVE_READDIR_R
1177	UNLOCK (readdirlock);
1178	#endif
1179	#if !HAVE_PREADWRITE
1180	UNLOCK (preadwritelock);
1181	#endif
1182	UNLOCK (reslock);
1183	UNLOCK (reqlock);
1184	UNLOCK (wrklock);
1185	}
1186
1187	static void atfork_child (void)
1188	{
1189	aio_req prv;
1190
1191	while (prv = reqq_shift (&req_queue))
1192	req_free (prv);
1193
1194	while (prv = reqq_shift (&res_queue))
1195	req_free (prv);
1196
1197	while (wrk_first.next != &wrk_first)
1198	{
1199	worker *wrk = wrk_first.next;
1200
1201	if (wrk->req)
1202	req_free (wrk->req);
1203
1204	worker_clear (wrk);
1205	worker_free (wrk);
1206	}
1207
1208	started = 0;
1209	idle = 0;
1210	nreqs = 0;
1211	nready = 0;
1212	npending = 0;
1213
1214	close (respipe [0]);
1215	close (respipe [1]);
1216	create_pipe ();
1217
1218	atfork_parent ();
1219	}	484	}
1220		485
1221	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
1222	aio_req req; \	488	aio_req req; \
1223	int req_pri = next_pri; \	489	int req_pri = next_pri; \
1224	next_pri = DEFAULT_PRI + PRI_BIAS; \	490	next_pri = EIO_PRI_DEFAULT; \
1225	\	491	\
1226	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
1227	croak ("callback must be undef or of reference type"); \
1228	\	493	\
1229	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
1230	if (!req) \	495	if (!req) \
1231	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
1232	\	497	\
1233	req->callback = newSVsv (callback); \	498	req->callback = SvREFCNT_inc (cb_cv); \
1234	req->pri = req_pri	499	req->pri = req_pri
1235		500
1236	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
1237	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
1238	\	505	\
1239	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
1240	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1241		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
		518	}
		519
1242	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
1243		521
1244	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
1245		523
1246	BOOT:	524	BOOT:
1247	{	525	{
1248	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
1249		527
1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1256		540
1257	create_pipe ();	541	create_respipe ();
1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	542
		543	if (eio_init (want_poll, done_poll) < 0)
		544	croak ("IO::AIO: unable to initialise eio library");
		545
		546	/* atfork child called in fifo order, so before eio's handler */
		547	X_THREAD_ATFORK (0, 0, atfork_child);
1259	}	548	}
1260		549
1261	void	550	void
1262	max_poll_reqs (int nreqs)	551	max_poll_reqs (int nreqs)
1263	PROTOTYPE: $	552	PROTOTYPE: $
1264	CODE:	553	CODE:
1265	max_poll_reqs = nreqs;	554	eio_set_max_poll_reqs (nreqs);
1266		555
1267	void	556	void
1268	max_poll_time (double nseconds)	557	max_poll_time (double nseconds)
1269	PROTOTYPE: $	558	PROTOTYPE: $
1270	CODE:	559	CODE:
1271	max_poll_time = nseconds * AIO_TICKS;	560	eio_set_max_poll_time (nseconds);
1272		561
1273	void	562	void
1274	min_parallel (int nthreads)	563	min_parallel (int nthreads)
1275	PROTOTYPE: $	564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
1276		567
1277	void	568	void
1278	max_parallel (int nthreads)	569	max_parallel (int nthreads)
1279	PROTOTYPE: $	570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
1280		573
1281	void	574	void
1282	max_idle (int nthreads)	575	max_idle (int nthreads)
1283	PROTOTYPE: $	576	PROTOTYPE: $
1284	CODE:	577	CODE:
1285	set_max_idle (nthreads);	578	eio_set_max_idle (nthreads);
1286		579
1287	int	580	void
1288	max_outstanding (int maxreqs)	581	max_outstanding (int maxreqs)
1289	PROTOTYPE: $	582	PROTOTYPE: $
1290	CODE:	583	CODE:
1291	RETVAL = max_outstanding;
1292	max_outstanding = maxreqs;	584	max_outstanding = maxreqs;
1293	OUTPUT:
1294	RETVAL
1295		585
1296	void	586	void
1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1298	SV * pathname
1299	int flags
1300	int mode
1301	SV * callback
1302	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
1303	PPCODE:	589	PPCODE:
1304	{	590	{
1305	dREQ;	591	dREQ;
1306		592
1307	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
1308	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
1309	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1310	req->fd = flags;	596	req->int1 = flags;
1311	req->mode = mode;	597	req->int2 = mode;
1312		598
1313	REQ_SEND;	599	REQ_SEND;
1314	}	600	}
1315		601
1316	void	602	void
1317	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1318	SV * fh
1319	SV * callback
1320	PROTOTYPE: $;$	604	PROTOTYPE: $;$
1321	ALIAS:	605	ALIAS:
1322	aio_close = REQ_CLOSE
1323	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
1324	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
1325	PPCODE:	608	PPCODE:
1326	{	609	{
		610	int fd = extract_fd (fh, 0);
1327	dREQ;	611	dREQ;
1328		612
1329	req->type = ix;	613	req->type = ix;
1330	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
1332		616
1333	REQ_SEND (req);	617	REQ_SEND (req);
1334	}	618	}
1335		619
1336	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
1337	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1338	SV * fh
1339	UV offset
1340	UV length
1341	SV * data
1342	UV dataoffset
1343	SV * callback
1344	ALIAS:	669	ALIAS:
1345	aio_read = REQ_READ	670	aio_read = EIO_READ
1346	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
1347	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
1348	PPCODE:	673	PPCODE:
1349	{	674	{
1350	aio_req req;
1351	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
1352	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
1353		678	UV len = SvUV (length);
1354	SvUPGRADE (data, SVt_PV);
1355	SvPOK_on (data);
1356		679
1357	if (dataoffset < 0)	680	if (dataoffset < 0)
1358	dataoffset += svlen;	681	dataoffset += svlen;
1359		682
1360	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
1361	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
1362		685
1363	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
1364	{	687	{
1365	/* write: check length and adjust. */	688	/* write: check length and adjust. */
1366	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
1367	length = svlen - dataoffset;	690	len = svlen - dataoffset;
1368	}	691	}
1369	else	692	else
1370	{	693	{
1371	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
1372	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
1373	}	697	}
1374		698
1375	if (length < 0)	699	if (len < 0)
1376	croak ("length must not be negative");	700	croak ("length must not be negative");
1377		701
1378	{	702	{
1379	dREQ;	703	dREQ;
1380		704
1381	req->type = ix;	705	req->type = ix;
1382	req->fh = newSVsv (fh);	706	req->sv1 = newSVsv (fh);
1383	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	707	req->int1 = fd;
1384	: IoOFP (sv_2io (fh)));	708	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1385	req->offset = offset;	709	req->size = len;
1386	req->length = length;
1387	req->data = SvREFCNT_inc (data);	710	req->sv2 = SvREFCNT_inc (data);
1388	req->dataptr = (char *)svptr + dataoffset;	711	req->ptr2 = (char *)svptr + dataoffset;
		712	req->stroffset = dataoffset;
1389		713
1390	if (!SvREADONLY (data))	714	if (!SvREADONLY (data))
1391	{	715	{
1392	SvREADONLY_on (data);	716	SvREADONLY_on (data);
1393	req->data2ptr = (void *)data;	717	req->flags |= FLAG_SV2_RO_OFF;
1394	}	718	}
1395		719
1396	REQ_SEND;	720	REQ_SEND;
1397	}	721	}
1398	}	722	}
1399		723
1400	void	724	void
		725	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		726	PROTOTYPE: $$;$
		727	PPCODE:
		728	{
		729	SV *data;
		730	dREQ;
		731
		732	req->type = EIO_READLINK;
		733	req->sv1 = newSVsv (path);
		734	req->ptr1 = SvPVbyte_nolen (req->sv1);
		735
		736	REQ_SEND;
		737	}
		738
		739	void
1401	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	740	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1402	SV * out_fh
1403	SV * in_fh
1404	UV in_offset
1405	UV length
1406	SV * callback
1407	PROTOTYPE: $$$$;$	741	PROTOTYPE: $$$$;$
1408	PPCODE:	742	PPCODE:
1409	{	743	{
		744	int ifd = extract_fd (in_fh , 0);
		745	int ofd = extract_fd (out_fh, 0);
1410	dREQ;	746	dREQ;
1411		747
1412	req->type = REQ_SENDFILE;	748	req->type = EIO_SENDFILE;
1413	req->fh = newSVsv (out_fh);	749	req->sv1 = newSVsv (out_fh);
1414	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	750	req->int1 = ofd;
1415	req->fh2 = newSVsv (in_fh);	751	req->sv2 = newSVsv (in_fh);
1416	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	752	req->int2 = ifd;
1417	req->offset = in_offset;	753	req->offs = SvVAL64 (in_offset);
1418	req->length = length;	754	req->size = length;
1419		755
1420	REQ_SEND;	756	REQ_SEND;
1421	}	757	}
1422		758
1423	void	759	void
1424	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	760	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1425	SV * fh
1426	UV offset
1427	IV length
1428	SV * callback
1429	PROTOTYPE: $$$;$	761	PROTOTYPE: $$$;$
1430	PPCODE:	762	PPCODE:
1431	{	763	{
		764	int fd = extract_fd (fh, 0);
1432	dREQ;	765	dREQ;
1433		766
1434	req->type = REQ_READAHEAD;	767	req->type = EIO_READAHEAD;
1435	req->fh = newSVsv (fh);	768	req->sv1 = newSVsv (fh);
1436	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	769	req->int1 = fd;
1437	req->offset = offset;	770	req->offs = SvVAL64 (offset);
1438	req->length = length;	771	req->size = length;
1439		772
1440	REQ_SEND;	773	REQ_SEND;
1441	}	774	}
1442		775
1443	void	776	void
1444	aio_stat (fh_or_path,callback=&PL_sv_undef)	777	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1445	SV * fh_or_path
1446	SV * callback
1447	ALIAS:	778	ALIAS:
1448	aio_stat = REQ_STAT	779	aio_stat = EIO_STAT
1449	aio_lstat = REQ_LSTAT	780	aio_lstat = EIO_LSTAT
1450	PPCODE:	781	PPCODE:
1451	{	782	{
1452	dREQ;	783	dREQ;
1453		784
1454	New (0, req->statdata, 1, Stat_t);	785	req->sv1 = newSVsv (fh_or_path);
1455	if (!req->statdata)
1456	{
1457	req_free (req);
1458	croak ("out of memory during aio_req->statdata allocation");
1459	}
1460		786
1461	if (SvPOK (fh_or_path))	787	if (SvPOK (req->sv1))
1462	{	788	{
1463	req->type = ix;	789	req->type = ix;
1464	req->data = newSVsv (fh_or_path);
1465	req->dataptr = SvPVbyte_nolen (req->data);	790	req->ptr1 = SvPVbyte_nolen (req->sv1);
1466	}	791	}
1467	else	792	else
1468	{	793	{
1469	req->type = REQ_FSTAT;	794	req->type = EIO_FSTAT;
1470	req->fh = newSVsv (fh_or_path);
1471	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	795	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1472	}	796	}
1473		797
1474	REQ_SEND;	798	REQ_SEND;
1475	}	799	}
1476		800
1477	void	801	void
		802	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		803	PPCODE:
		804	{
		805	dREQ;
		806
		807	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		808	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		809	req->sv1 = newSVsv (fh_or_path);
		810
		811	if (SvPOK (req->sv1))
		812	{
		813	req->type = EIO_UTIME;
		814	req->ptr1 = SvPVbyte_nolen (req->sv1);
		815	}
		816	else
		817	{
		818	req->type = EIO_FUTIME;
		819	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		820	}
		821
		822	REQ_SEND;
		823	}
		824
		825	void
		826	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		827	PPCODE:
		828	{
		829	dREQ;
		830
		831	req->sv1 = newSVsv (fh_or_path);
		832	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		833
		834	if (SvPOK (req->sv1))
		835	{
		836	req->type = EIO_TRUNCATE;
		837	req->ptr1 = SvPVbyte_nolen (req->sv1);
		838	}
		839	else
		840	{
		841	req->type = EIO_FTRUNCATE;
		842	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		843	}
		844
		845	REQ_SEND;
		846	}
		847
		848	void
		849	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		850	ALIAS:
		851	aio_chmod = EIO_CHMOD
		852	aio_mkdir = EIO_MKDIR
		853	PPCODE:
		854	{
		855	dREQ;
		856
		857	req->int2 = mode;
		858	req->sv1 = newSVsv (fh_or_path);
		859
		860	if (SvPOK (req->sv1))
		861	{
		862	req->type = ix;
		863	req->ptr1 = SvPVbyte_nolen (req->sv1);
		864	}
		865	else
		866	{
		867	req->type = EIO_FCHMOD;
		868	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		869	}
		870
		871	REQ_SEND;
		872	}
		873
		874	void
		875	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
		879
		880	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		881	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		882	req->sv1 = newSVsv (fh_or_path);
		883
		884	if (SvPOK (req->sv1))
		885	{
		886	req->type = EIO_CHOWN;
		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
		888	}
		889	else
		890	{
		891	req->type = EIO_FCHOWN;
		892	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		893	}
		894
		895	REQ_SEND;
		896	}
		897
		898	void
1478	aio_unlink (pathname,callback=&PL_sv_undef)	899	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1479	SV * pathname
1480	SV * callback
1481	ALIAS:	900	ALIAS:
1482	aio_unlink = REQ_UNLINK	901	aio_unlink = EIO_UNLINK
1483	aio_rmdir = REQ_RMDIR	902	aio_rmdir = EIO_RMDIR
1484	aio_readdir = REQ_READDIR	903	aio_readdir = EIO_READDIR
1485	PPCODE:	904	PPCODE:
1486	{	905	{
1487	dREQ;	906	dREQ;
1488		907
1489	req->type = ix;	908	req->type = ix;
1490	req->data = newSVsv (pathname);	909	req->sv1 = newSVsv (pathname);
1491	req->dataptr = SvPVbyte_nolen (req->data);	910	req->ptr1 = SvPVbyte_nolen (req->sv1);
		911
		912	REQ_SEND;
		913	}
		914
		915	void
		916	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		917	ALIAS:
		918	aio_link = EIO_LINK
		919	aio_symlink = EIO_SYMLINK
		920	aio_rename = EIO_RENAME
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->type = ix;
		926	req->sv1 = newSVsv (oldpath);
		927	req->ptr1 = SvPVbyte_nolen (req->sv1);
		928	req->sv2 = newSVsv (newpath);
		929	req->ptr2 = SvPVbyte_nolen (req->sv2);
1492		930
1493	REQ_SEND;	931	REQ_SEND;
1494	}	932	}
1495		933
1496	void	934	void
1497	aio_link (oldpath,newpath,callback=&PL_sv_undef)	935	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1498	SV * oldpath
1499	SV * newpath
1500	SV * callback
1501	ALIAS:
1502	aio_link = REQ_LINK
1503	aio_symlink = REQ_SYMLINK
1504	aio_rename = REQ_RENAME
1505	PPCODE:	936	PPCODE:
1506	{	937	{
1507	dREQ;	938	dREQ;
1508		939
1509	req->type = ix;	940	req->type = EIO_MKNOD;
1510	req->fh = newSVsv (oldpath);	941	req->sv1 = newSVsv (pathname);
1511	req->data2ptr = SvPVbyte_nolen (req->fh);	942	req->ptr1 = SvPVbyte_nolen (req->sv1);
1512	req->data = newSVsv (newpath);	943	req->int2 = (mode_t)mode;
1513	req->dataptr = SvPVbyte_nolen (req->data);	944	req->offs = dev;
1514		945
1515	REQ_SEND;	946	REQ_SEND;
1516	}	947	}
1517		948
1518	void	949	void
1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	950	aio_busy (double delay, SV *callback=&PL_sv_undef)
1520	SV * pathname
1521	SV * callback
1522	UV mode
1523	UV dev
1524	PPCODE:	951	PPCODE:
1525	{	952	{
1526	dREQ;	953	dREQ;
1527		954
1528	req->type = REQ_MKNOD;	955	req->type = EIO_BUSY;
1529	req->data = newSVsv (pathname);	956	req->nv1 = delay < 0. ? 0. : delay;
1530	req->dataptr = SvPVbyte_nolen (req->data);	957
1531	req->mode = (mode_t)mode;
1532	req->offset = dev;
1533
1534	REQ_SEND;	958	REQ_SEND;
1535	}	959	}
1536		960
1537	void	961	void
1538	aio_busy (delay,callback=&PL_sv_undef)
1539	double delay
1540	SV * callback
1541	PPCODE:
1542	{
1543	dREQ;
1544
1545	req->type = REQ_BUSY;
1546	req->fd = delay < 0. ? 0 : delay;
1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1548
1549	REQ_SEND;
1550	}
1551
1552	void
1553	aio_group (callback=&PL_sv_undef)	962	aio_group (SV *callback=&PL_sv_undef)
1554	SV * callback
1555	PROTOTYPE: ;$	963	PROTOTYPE: ;$
1556	PPCODE:	964	PPCODE:
1557	{	965	{
1558	dREQ;	966	dREQ;
1559		967
1560	req->type = REQ_GROUP;	968	req->type = EIO_GROUP;
		969
1561	req_send (req);	970	req_submit (req);
1562
1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));	971	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1564	}	972	}
1565		973
1566	void	974	void
1567	aio_nop (callback=&PL_sv_undef)	975	aio_nop (SV *callback=&PL_sv_undef)
1568	SV * callback	976	ALIAS:
		977	aio_nop = EIO_NOP
		978	aio_sync = EIO_SYNC
1569	PPCODE:	979	PPCODE:
1570	{	980	{
1571	dREQ;	981	dREQ;
1572		982
1573	req->type = REQ_NOP;	983	req->type = ix;
1574		984
1575	REQ_SEND;	985	REQ_SEND;
1576	}	986	}
1577		987
1578	int	988	int
1579	aioreq_pri (int pri = 0)	989	aioreq_pri (int pri = 0)
1580	PROTOTYPE: ;$	990	PROTOTYPE: ;$
1581	CODE:	991	CODE:
1582	RETVAL = next_pri - PRI_BIAS;	992	RETVAL = next_pri;
1583	if (items > 0)	993	if (items > 0)
1584	{	994	{
1585	if (pri < PRI_MIN) pri = PRI_MIN;	995	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1586	if (pri > PRI_MAX) pri = PRI_MAX;	996	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1587	next_pri = pri + PRI_BIAS;	997	next_pri = pri;
1588	}	998	}
1589	OUTPUT:	999	OUTPUT:
1590	RETVAL	1000	RETVAL
1591		1001
1592	void	1002	void
1593	aioreq_nice (int nice = 0)	1003	aioreq_nice (int nice = 0)
1594	CODE:	1004	CODE:
1595	nice = next_pri - nice;	1005	nice = next_pri - nice;
1596	if (nice < PRI_MIN) nice = PRI_MIN;	1006	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1597	if (nice > PRI_MAX) nice = PRI_MAX;	1007	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1598	next_pri = nice + PRI_BIAS;	1008	next_pri = nice;
1599		1009
1600	void	1010	void
1601	flush ()	1011	flush ()
1602	PROTOTYPE:	1012	PROTOTYPE:
1603	CODE:	1013	CODE:
1604	while (nreqs)	1014	while (eio_nreqs ())
1605	{	1015	{
1606	poll_wait ();	1016	poll_wait ();
1607	poll_cb (0);	1017	poll_cb ();
1608	}	1018	}
1609		1019
1610	void	1020	int
1611	poll()	1021	poll()
1612	PROTOTYPE:	1022	PROTOTYPE:
1613	CODE:	1023	CODE:
1614	if (nreqs)
1615	{
1616	poll_wait ();	1024	poll_wait ();
1617	poll_cb (0);	1025	RETVAL = poll_cb ();
1618	}	1026	OUTPUT:
		1027	RETVAL
1619		1028
1620	int	1029	int
1621	poll_fileno()	1030	poll_fileno()
1622	PROTOTYPE:	1031	PROTOTYPE:
1623	CODE:	1032	CODE:
…		…
1635		1044
1636	void	1045	void
1637	poll_wait()	1046	poll_wait()
1638	PROTOTYPE:	1047	PROTOTYPE:
1639	CODE:	1048	CODE:
1640	if (nreqs)
1641	poll_wait ();	1049	poll_wait ();
1642		1050
1643	int	1051	int
1644	nreqs()	1052	nreqs()
1645	PROTOTYPE:	1053	PROTOTYPE:
1646	CODE:	1054	CODE:
1647	RETVAL = nreqs;	1055	RETVAL = eio_nreqs ();
1648	OUTPUT:	1056	OUTPUT:
1649	RETVAL	1057	RETVAL
1650		1058
1651	int	1059	int
1652	nready()	1060	nready()
1653	PROTOTYPE:	1061	PROTOTYPE:
1654	CODE:	1062	CODE:
1655	RETVAL = get_nready ();	1063	RETVAL = eio_nready ();
1656	OUTPUT:	1064	OUTPUT:
1657	RETVAL	1065	RETVAL
1658		1066
1659	int	1067	int
1660	npending()	1068	npending()
1661	PROTOTYPE:	1069	PROTOTYPE:
1662	CODE:	1070	CODE:
1663	RETVAL = get_npending ();	1071	RETVAL = eio_npending ();
1664	OUTPUT:	1072	OUTPUT:
1665	RETVAL	1073	RETVAL
1666		1074
1667	int	1075	int
1668	nthreads()	1076	nthreads()
1669	PROTOTYPE:	1077	PROTOTYPE:
1670	CODE:	1078	CODE:
1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1079	RETVAL = eio_nthreads ();
1672	RETVAL = started;
1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1674	OUTPUT:	1080	OUTPUT:
1675	RETVAL	1081	RETVAL
1676		1082
		1083	void _on_next_submit (SV *cb)
		1084	CODE:
		1085	SvREFCNT_dec (on_next_submit);
		1086	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1087
1677	PROTOTYPES: DISABLE	1088	PROTOTYPES: DISABLE
1678		1089
1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1090	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1680		1091
1681	void	1092	void
1682	cancel (aio_req_ornot req)	1093	cancel (aio_req_ornot req)
1683	CODE:	1094	CODE:
1684	req_cancel (req);	1095	eio_cancel (req);
1685		1096
1686	void	1097	void
1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1098	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1688	CODE:	1099	PPCODE:
		1100	{
		1101	if (GIMME_V != G_VOID)
		1102	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1103
		1104	if (items > 1)
		1105	{
		1106	SV *cb_cv = get_cb (callback);
		1107
1689	SvREFCNT_dec (req->callback);	1108	SvREFCNT_dec (req->callback);
1690	req->callback = newSVsv (callback);	1109	req->callback = SvREFCNT_inc (cb_cv);
		1110	}
		1111	}
1691		1112
1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1113	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1693		1114
1694	void	1115	void
1695	add (aio_req grp, ...)	1116	add (aio_req grp, ...)
1696	PPCODE:	1117	PPCODE:
1697	{	1118	{
1698	int i;	1119	int i;
1699	aio_req req;
1700		1120
1701	if (grp->fd == 2)	1121	if (grp->int1 == 2)
1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1122	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1703		1123
1704	for (i = 1; i < items; ++i )	1124	for (i = 1; i < items; ++i )
1705	{	1125	{
		1126	aio_req req;
		1127
1706	if (GIMME_V != G_VOID)	1128	if (GIMME_V != G_VOID)
1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1129	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1708		1130
1709	req = SvAIO_REQ (ST (i));	1131	req = SvAIO_REQ (ST (i));
1710		1132
1711	if (req)	1133	if (req)
1712	{	1134	eio_grp_add (grp, req);
1713	++grp->length;
1714	req->grp = grp;
1715
1716	req->grp_prev = 0;
1717	req->grp_next = grp->grp_first;
1718
1719	if (grp->grp_first)
1720	grp->grp_first->grp_prev = req;
1721
1722	grp->grp_first = req;
1723	}
1724	}	1135	}
1725	}	1136	}
1726		1137
1727	void	1138	void
1728	cancel_subs (aio_req_ornot req)	1139	cancel_subs (aio_req_ornot req)
…		…
1741	av = newAV ();	1152	av = newAV ();
1742		1153
1743	for (i = 1; i < items; ++i )	1154	for (i = 1; i < items; ++i )
1744	av_push (av, newSVsv (ST (i)));	1155	av_push (av, newSVsv (ST (i)));
1745		1156
1746	SvREFCNT_dec (grp->data);	1157	SvREFCNT_dec (grp->sv1);
1747	grp->data = (SV *)av;	1158	grp->sv1 = (SV *)av;
1748	}	1159	}
1749		1160
1750	void	1161	void
1751	errno (aio_req grp, int errorno = errno)	1162	errno (aio_req grp, int errorno = errno)
1752	CODE:	1163	CODE:
1753	grp->errorno = errorno;	1164	grp->errorno = errorno;
1754		1165
1755	void	1166	void
1756	limit (aio_req grp, int limit)	1167	limit (aio_req grp, int limit)
1757	CODE:	1168	CODE:
1758	grp->fd2 = limit;	1169	eio_grp_limit (grp, limit);
1759	aio_grp_feed (grp);
1760		1170
1761	void	1171	void
1762	feed (aio_req grp, SV *callback=&PL_sv_undef)	1172	feed (aio_req grp, SV *callback=&PL_sv_undef)
1763	CODE:	1173	CODE:
1764	{	1174	{
1765	SvREFCNT_dec (grp->fh2);	1175	SvREFCNT_dec (grp->sv2);
1766	grp->fh2 = newSVsv (callback);	1176	grp->sv2 = newSVsv (callback);
		1177	grp->feed = aio_grp_feed;
1767		1178
1768	if (grp->fd2 <= 0)	1179	if (grp->int2 <= 0)
1769	grp->fd2 = 2;	1180	grp->int2 = 2;
1770		1181
1771	aio_grp_feed (grp);	1182	eio_grp_limit (grp, grp->int2);
1772	}	1183	}
1773		1184

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