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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC vs.
Revision 1.117 by root, Sat May 10 20:02:09 2008 UTC

1	#include "xthread.h"	1	#include "libeio/xthread.h"
2		2
3	#include <errno.h>	3	#include <errno.h>
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "autoconf/config.h"
10
11	#include <stddef.h>	9	#include <stddef.h>
12	#include <stdlib.h>	10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	#ifdef _WIN32
25	# if __linux	19
26	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __freebsd	21	# undef malloc
28	# include <sys/socket.h>	22	# undef free
29	# include <sys/uio.h>	23
30	# elif __hpux	24	// perl overrides all those nice win32 functions
31	# include <sys/socket.h>	25	# undef open
32	# elif __solaris /* not yet */	26	# undef read
33	# include <sys/sendfile.h>	27	# undef write
		28	# undef send
		29	# undef recv
		30	# undef stat
		31	# undef fstat
		32	# define lstat stat
		33	# undef truncate
		34	# undef ftruncate
		35	# undef open
		36	# undef close
		37	# undef unlink
		38	# undef rmdir
		39	# undef rename
		40	# undef lseek
		41
		42	# define chown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchmod(a,b) (errno = ENOSYS, -1)
		45	# define symlink(a,b) (errno = ENOSYS, -1)
		46	# define readlink(a,b,c) (errno = ENOSYS, -1)
		47	# define mknod(a,b,c) (errno = ENOSYS, -1)
		48	# define truncate(a,b) (errno = ENOSYS, -1)
		49	# define ftruncate(fd,o) chsize ((fd), (o))
		50	# define fsync(fd) _commit (fd)
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54	# define mkdir(a,b) mkdir (a)
		55
34	# else	56	#else
35	# error sendfile support requested but not available	57
36	# endif	58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	# define EIO_STRUCT_DIRENT struct dirent
		64
37	#endif	65	#endif
38		66
39	/* number of seconds after which idle threads exit */	67	#define EIO_STRUCT_STAT Stat_t
40	#define IDLE_TIMEOUT 10
41		68
42	/* used for struct dirent, AIX doesn't provide it */	69	/* use NV for 32 bit perls as it allows larger offsets */
43	#ifndef NAME_MAX	70	#if IVSIZE >= 8
44	# define NAME_MAX 4096	71	# define SvVAL64 SvIV
		72	#else
		73	# define SvVAL64 SvNV
45	#endif	74	#endif
46		75
47	/* buffer size for various temporary buffers */	76	static HV *stash;
48	#define AIO_BUFSIZE 65536
49
50	#define dBUF \
51	char *aio_buf; \
52	LOCK (wrklock); \
53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
54	UNLOCK (wrklock); \
55	if (!aio_buf) \
56	return -1;
57
58	typedef SV SV8; /* byte-sv, used for argument-checking */	77	typedef SV SV8; /* byte-sv, used for argument-checking */
59
60	enum {
61	REQ_QUIT,
62	REQ_OPEN, REQ_CLOSE,
63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
64	REQ_SENDFILE,
65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
66	REQ_FSYNC, REQ_FDATASYNC,
67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
68	REQ_MKNOD, REQ_READDIR,
69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
70	REQ_GROUP, REQ_NOP,
71	REQ_BUSY,
72	};
73		78
74	#define AIO_REQ_KLASS "IO::AIO::REQ"	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
75	#define AIO_GRP_KLASS "IO::AIO::GRP"	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
76		81
77	typedef struct aio_cb	82	#define EIO_COMMON \
78	{
79	struct aio_cb *volatile next;
80
81	SV *callback, *fh;	83	SV *callback; \
82	SV *sv1, *sv2;	84	SV *sv1, *sv2; \
83	void *ptr1, *ptr2;
84	off_t offs;
85	size_t size;
86	ssize_t result;
87
88	STRLEN stroffset;	85	STRLEN stroffset; \
89	int type;	86	SV *self
90	int int1, int2;
91	int errorno;
92	mode_t mode; /* open */
93		87
94	unsigned char flags;	88	#include "libeio/eio.h"
95	unsigned char pri;
96		89
97	SV *self; /* the perl counterpart of this request, if any */	90	static int req_invoke (eio_req *req);
98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	91	#define EIO_FINISH(req) req_invoke (req)
99	} aio_cb;	92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
100		96
101	enum {	97	enum {
102	FLAG_CANCELLED = 0x01, /* request was cancelled */
103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
105	};	99	};
106		100
		101	#include "libeio/eio.c"
		102
107	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
108	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
109		105
110	enum {	106	static SV *on_next_submit;
111	PRI_MIN = -4,
112	PRI_MAX = 4,
113
114	DEFAULT_PRI = 0,
115	PRI_BIAS = -PRI_MIN,
116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
117	};
118
119	#define AIO_TICKS ((1000000 + 1023) >> 10)
120
121	static unsigned int max_poll_time = 0;
122	static unsigned int max_poll_reqs = 0;
123
124	/* calculcate time difference in ~1/AIO_TICKS of a second */
125	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
126	{
127	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
128	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
129	}
130
131	static thread_t main_tid;
132	static int main_sig;
133	static int block_sig_level;
134
135	void block_sig ()
136	{
137	sigset_t ss;
138
139	if (block_sig_level++)
140	return;
141
142	if (!main_sig)
143	return;
144
145	sigemptyset (&ss);
146	sigaddset (&ss, main_sig);
147	pthread_sigmask (SIG_BLOCK, &ss, 0);
148	}
149
150	void unblock_sig ()
151	{
152	sigset_t ss;
153
154	if (--block_sig_level)
155	return;
156
157	if (!main_sig)
158	return;
159
160	sigemptyset (&ss);
161	sigaddset (&ss, main_sig);
162	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
		108	static int max_outstanding;
166		109
167	static unsigned int started, idle, wanted;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
168		111
169	/* worker threads management */
170	static mutex_t wrklock = MUTEX_INIT;
171
172	typedef struct worker {
173	/* locked by wrklock */
174	struct worker *prev, *next;
175
176	thread_t tid;
177
178	/* locked by reslock, reqlock or wrklock */
179	aio_req req; /* currently processed request */
180	void *dbuf;
181	DIR *dirp;
182	} worker;
183
184	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
185
186	static void worker_clear (worker *wrk)
187	{
188	if (wrk->dirp)
189	{
190	closedir (wrk->dirp);
191	wrk->dirp = 0;
192	}
193
194	if (wrk->dbuf)
195	{
196	free (wrk->dbuf);
197	wrk->dbuf = 0;
198	}
199	}
200
201	static void worker_free (worker *wrk)
202	{
203	wrk->next->prev = wrk->prev;
204	wrk->prev->next = wrk->next;
205
206	free (wrk);
207	}
208
209	static volatile unsigned int nreqs, nready, npending;
210	static volatile unsigned int max_idle = 4;
211	static volatile unsigned int max_outstanding = 0xffffffff;
212	static int respipe [2];
213
214	static mutex_t reslock = MUTEX_INIT;
215	static mutex_t reqlock = MUTEX_INIT;
216	static cond_t reqwait = COND_INIT;
217
218	#if WORDACCESS_UNSAFE
219
220	static unsigned int get_nready ()
221	{
222	unsigned int retval;
223
224	LOCK (reqlock);
225	retval = nready;
226	UNLOCK (reqlock);
227
228	return retval;
229	}
230
231	static unsigned int get_npending ()
232	{
233	unsigned int retval;
234
235	LOCK (reslock);
236	retval = npending;
237	UNLOCK (reslock);
238
239	return retval;
240	}
241
242	static unsigned int get_nthreads ()
243	{
244	unsigned int retval;
245
246	LOCK (wrklock);
247	retval = started;
248	UNLOCK (wrklock);
249
250	return retval;
251	}
252
253	#else
254
255	# define get_nready() nready
256	# define get_npending() npending
257	# define get_nthreads() started
258
259	#endif
260
261	/*
262	* a somewhat faster data structure might be nice, but
263	* with 8 priorities this actually needs <20 insns
264	* per shift, the most expensive operation.
265	*/
266	typedef struct {
267	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
268	int size;
269	} reqq;
270
271	static reqq req_queue;
272	static reqq res_queue;
273
274	int reqq_push (reqq *q, aio_req req)
275	{
276	int pri = req->pri;
277	req->next = 0;
278
279	if (q->qe[pri])
280	{
281	q->qe[pri]->next = req;
282	q->qe[pri] = req;
283	}
284	else
285	q->qe[pri] = q->qs[pri] = req;
286
287	return q->size++;
288	}
289
290	aio_req reqq_shift (reqq *q)
291	{
292	int pri;
293
294	if (!q->size)
295	return 0;
296
297	--q->size;
298
299	for (pri = NUM_PRI; pri--; )
300	{
301	aio_req req = q->qs[pri];
302
303	if (req)
304	{
305	if (!(q->qs[pri] = req->next))
306	q->qe[pri] = 0;
307
308	return req;
309	}
310	}
311
312	abort ();
313	}
314
315	static int poll_cb ();
316	static int req_invoke (aio_req req);
317	static void req_free (aio_req req);	112	static void req_destroy (aio_req req);
318	static void req_cancel (aio_req req);	113	static void req_cancel (aio_req req);
		114
		115	static void want_poll (void)
		116	{
		117	/* write a dummy byte to the pipe so fh becomes ready */
		118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		119	}
		120
		121	static void done_poll (void)
		122	{
		123	/* read any signals sent by the worker threads */
		124	char buf [4];
		125	while (respipe_read (respipe [0], buf, 4) == 4)
		126	;
		127	}
319		128
320	/* must be called at most once */	129	/* must be called at most once */
321	static SV *req_sv (aio_req req, const char *klass)	130	static SV *req_sv (aio_req req, const char *klass)
322	{	131	{
323	if (!req->self)	132	if (!req->self)
…		…
341	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
342	}	151	}
343		152
344	static void aio_grp_feed (aio_req grp)	153	static void aio_grp_feed (aio_req grp)
345	{	154	{
346	block_sig ();	155	if (grp->sv2 && SvOK (grp->sv2))
347
348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
349	{	156	{
350	int old_len = grp->size;
351
352	if (grp->sv2 && SvOK (grp->sv2))
353	{
354	dSP;	157	dSP;
355		158
356	ENTER;	159	ENTER;
357	SAVETMPS;	160	SAVETMPS;
358	PUSHMARK (SP);	161	PUSHMARK (SP);
359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
360	PUTBACK;	163	PUTBACK;
361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
362	SPAGAIN;	165	SPAGAIN;
363	FREETMPS;	166	FREETMPS;
364	LEAVE;	167	LEAVE;
365	}
366
367	/* stop if no progress has been made */
368	if (old_len == grp->size)
369	{
370	SvREFCNT_dec (grp->sv2);
371	grp->sv2 = 0;
372	break;
373	}
374	}	168	}
375
376	unblock_sig ();
377	}	169	}
378		170
379	static void aio_grp_dec (aio_req grp)	171	static void req_submit (eio_req *req)
380	{	172	{
381	--grp->size;	173	eio_submit (req);
382		174
383	/* call feeder, if applicable */	175	if (on_next_submit)
384	aio_grp_feed (grp);
385
386	/* finish, if done */
387	if (!grp->size && grp->int1)
388	{	176	{
389	block_sig ();	177	dSP;
		178	SV *cb = sv_2mortal (on_next_submit);
390		179
391	if (!req_invoke (grp))	180	on_next_submit = 0;
392	{
393	req_free (grp);
394	unblock_sig ();
395	croak (0);
396	}
397		181
398	req_free (grp);	182	PUSHMARK (SP);
399	unblock_sig ();	183	PUTBACK;
		184	call_sv (cb, G_DISCARD | G_EVAL);
400	}	185	}
401	}	186	}
402		187
403	static int req_invoke (aio_req req)	188	static int req_invoke (eio_req *req)
404	{	189	{
405	dSP;	190	dSP;
406		191
407	if (req->flags & FLAG_SV1_RO_OFF)	192	if (req->flags & FLAG_SV2_RO_OFF)
408	SvREADONLY_off (req->sv1);	193	SvREADONLY_off (req->sv2);
409		194
410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
411	{	196	{
412	ENTER;	197	ENTER;
413	SAVETMPS;	198	SAVETMPS;
414	PUSHMARK (SP);	199	PUSHMARK (SP);
415	EXTEND (SP, 1);	200	EXTEND (SP, 1);
416		201
417	switch (req->type)	202	switch (req->type)
418	{	203	{
419	case REQ_READDIR:	204	case EIO_READDIR:
420	{	205	{
421	SV *rv = &PL_sv_undef;	206	SV *rv = &PL_sv_undef;
422		207
423	if (req->result >= 0)	208	if (req->result >= 0)
424	{	209	{
…		…
441		226
442	PUSHs (rv);	227	PUSHs (rv);
443	}	228	}
444	break;	229	break;
445		230
446	case REQ_OPEN:	231	case EIO_OPEN:
447	{	232	{
448	/* convert fd to fh */	233	/* convert fd to fh */
449	SV *fh;	234	SV *fh = &PL_sv_undef;
450		235
451	PUSHs (sv_2mortal (newSViv (req->result)));	236	if (req->result >= 0)
452	PUTBACK;	237	{
453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	238	GV *gv = (GV *)sv_newmortal ();
454	SPAGAIN;	239	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		240	char sym [64];
		241	int symlen;
		242
		243	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		244	gv_init (gv, stash, sym, symlen, 0);
455		245
456	fh = POPs;	246	symlen = snprintf (
457	PUSHMARK (SP);	247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
		252	);
		253
		254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
458	XPUSHs (fh);	258	PUSHs (fh);
459	}	259	}
460	break;	260	break;
461		261
462	case REQ_GROUP:	262	case EIO_GROUP:
463	req->int1 = 2; /* mark group as finished */	263	req->int1 = 2; /* mark group as finished */
464		264
465	if (req->sv1)	265	if (req->sv1)
466	{	266	{
467	int i;	267	int i;
…		…
471	for (i = 0; i <= AvFILL (av); ++i)	271	for (i = 0; i <= AvFILL (av); ++i)
472	PUSHs (*av_fetch (av, i, 0));	272	PUSHs (*av_fetch (av, i, 0));
473	}	273	}
474	break;	274	break;
475		275
476	case REQ_NOP:	276	case EIO_NOP:
477	case REQ_BUSY:	277	case EIO_BUSY:
478	break;	278	break;
479		279
480	case REQ_READLINK:	280	case EIO_READLINK:
481	if (req->result > 0)	281	if (req->result > 0)
482	{	282	{
483	SvCUR_set (req->sv1, req->result);	283	SvCUR_set (req->sv2, req->result);
484	*SvEND (req->sv1) = 0;	284	*SvEND (req->sv2) = 0;
485	PUSHs (req->sv1);	285	PUSHs (req->sv2);
486	}	286	}
487	break;	287	break;
488		288
489	case REQ_STAT:	289	case EIO_STAT:
490	case REQ_LSTAT:	290	case EIO_LSTAT:
491	case REQ_FSTAT:	291	case EIO_FSTAT:
492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	292	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
493	PL_laststatval = req->result;	293	PL_laststatval = req->result;
494	PL_statcache = *(Stat_t *)(req->ptr2);	294	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
495	PUSHs (sv_2mortal (newSViv (req->result)));	295	PUSHs (sv_2mortal (newSViv (req->result)));
496	break;	296	break;
497		297
498	case REQ_READ:	298	case EIO_READ:
499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	299	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
500	*SvEND (req->sv1) = 0;	300	*SvEND (req->sv2) = 0;
501	PUSHs (sv_2mortal (newSViv (req->result)));	301	PUSHs (sv_2mortal (newSViv (req->result)));
502	break;	302	break;
		303
		304	case EIO_DUP2:
		305	if (req->result > 0)
		306	req->result = 0;
		307	/* FALLTHROUGH */
503		308
504	default:	309	default:
505	PUSHs (sv_2mortal (newSViv (req->result)));	310	PUSHs (sv_2mortal (newSViv (req->result)));
506	break;	311	break;
507	}	312	}
508		313
509	errno = req->errorno;	314	errno = req->errorno;
510		315
511	PUTBACK;	316	PUTBACK;
512	call_sv (req->callback, G_VOID | G_EVAL);	317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
513	SPAGAIN;	318	SPAGAIN;
514		319
515	FREETMPS;	320	FREETMPS;
516	LEAVE;	321	LEAVE;
		322
		323	PUTBACK;
517	}	324	}
518		325
519	if (req->grp)
520	{
521	aio_req grp = req->grp;
522
523	/* unlink request */
524	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
525	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
526
527	if (grp->grp_first == req)
528	grp->grp_first = req->grp_next;
529
530	aio_grp_dec (grp);
531	}
532
533	return !SvTRUE (ERRSV);	326	return !!SvTRUE (ERRSV);
534	}	327	}
535		328
536	static void req_free (aio_req req)	329	static void req_destroy (aio_req req)
537	{	330	{
538	if (req->self)	331	if (req->self)
539	{	332	{
540	sv_unmagic (req->self, PERL_MAGIC_ext);	333	sv_unmagic (req->self, PERL_MAGIC_ext);
541	SvREFCNT_dec (req->self);	334	SvREFCNT_dec (req->self);
542	}	335	}
543		336
544	SvREFCNT_dec (req->fh);
545	SvREFCNT_dec (req->sv1);	337	SvREFCNT_dec (req->sv1);
546	SvREFCNT_dec (req->sv2);	338	SvREFCNT_dec (req->sv2);
547	SvREFCNT_dec (req->callback);	339	SvREFCNT_dec (req->callback);
548		340
549	if (req->flags & FLAG_PTR2_FREE)
550	free (req->ptr2);
551
552	Safefree (req);	341	Safefree (req);
553	}	342	}
554		343
555	static void req_cancel_subs (aio_req grp)	344	static void req_cancel_subs (aio_req grp)
556	{	345	{
557	aio_req sub;	346	aio_req sub;
558		347
559	if (grp->type != REQ_GROUP)	348	if (grp->type != EIO_GROUP)
560	return;	349	return;
561		350
562	SvREFCNT_dec (grp->sv2);	351	SvREFCNT_dec (grp->sv2);
563	grp->sv2 = 0;	352	grp->sv2 = 0;
564		353
565	for (sub = grp->grp_first; sub; sub = sub->grp_next)	354	eio_grp_cancel (grp);
566	req_cancel (sub);
567	}	355	}
568		356
569	static void req_cancel (aio_req req)	357	#ifdef USE_SOCKETS_AS_HANDLES
570	{	358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
571	req->flags |= FLAG_CANCELLED;	359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
572		362
573	req_cancel_subs (req);	363	static void
574	}	364	create_respipe (void)
575
576	static void *aio_proc(void *arg);
577
578	static void start_thread (void)
579	{	365	{
580	worker *wrk = calloc (1, sizeof (worker));	366	int old_readfd = respipe [0];
581		367
582	if (!wrk)	368	if (respipe [1] >= 0)
583	croak ("unable to allocate worker thread data");	369	respipe_close (TO_SOCKET (respipe [1]));
584		370
585	LOCK (wrklock);	371	#ifdef _WIN32
		372	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		373	#else
		374	if (pipe (respipe))
		375	#endif
		376	croak ("unable to initialize result pipe");
586		377
587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))	378	if (old_readfd >= 0)
588	{	379	{
589	wrk->prev = &wrk_first;	380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
590	wrk->next = wrk_first.next;	381	croak ("unable to initialize result pipe(2)");
591	wrk_first.next->prev = wrk;	382
592	wrk_first.next = wrk;	383	respipe_close (respipe [0]);
593	++started;	384	respipe [0] = old_readfd;
594	}	385	}
595	else
596	free (wrk);
597		386
598	UNLOCK (wrklock);	387	#ifdef _WIN32
599	}	388	int arg = 1;
		389	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		390	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		391	#else
		392	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		393	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		394	#endif
		395	croak ("unable to initialize result pipe(3)");
600		396
601	static void maybe_start_thread ()	397	respipe_osf [0] = TO_SOCKET (respipe [0]);
602	{	398	respipe_osf [1] = TO_SOCKET (respipe [1]);
603	if (get_nthreads () >= wanted)
604	return;
605
606	/* todo: maybe use idle here, but might be less exact */
607	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
608	return;
609
610	start_thread ();
611	}	399	}
612		400
613	static void req_send (aio_req req)
614	{
615	block_sig ();
616
617	++nreqs;
618
619	LOCK (reqlock);
620	++nready;
621	reqq_push (&req_queue, req);
622	COND_SIGNAL (reqwait);
623	UNLOCK (reqlock);
624
625	unblock_sig ();
626
627	maybe_start_thread ();
628	}
629
630	static void end_thread (void)
631	{
632	aio_req req;
633
634	Newz (0, req, 1, aio_cb);
635
636	req->type = REQ_QUIT;
637	req->pri = PRI_MAX + PRI_BIAS;
638
639	LOCK (reqlock);
640	reqq_push (&req_queue, req);
641	COND_SIGNAL (reqwait);
642	UNLOCK (reqlock);
643
644	LOCK (wrklock);
645	--started;
646	UNLOCK (wrklock);
647	}
648
649	static void set_max_idle (int nthreads)
650	{
651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
652	max_idle = nthreads <= 0 ? 1 : nthreads;
653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
654	}
655
656	static void min_parallel (int nthreads)
657	{
658	if (wanted < nthreads)
659	wanted = nthreads;
660	}
661
662	static void max_parallel (int nthreads)
663	{
664	if (wanted > nthreads)
665	wanted = nthreads;
666
667	while (started > wanted)
668	end_thread ();
669	}
670
671	static void poll_wait ()	401	static void poll_wait (void)
672	{	402	{
673	fd_set rfd;	403	fd_set rfd;
674		404
675	while (nreqs)	405	while (eio_nreqs ())
676	{	406	{
677	int size;	407	int size;
678	if (WORDACCESS_UNSAFE) LOCK (reslock);	408
		409	X_LOCK (reslock);
679	size = res_queue.size;	410	size = res_queue.size;
680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	411	X_UNLOCK (reslock);
681		412
682	if (size)	413	if (size)
683	return;	414	return;
684		415
685	maybe_start_thread ();	416	maybe_start_thread ();
686		417
687	FD_ZERO(&rfd);	418	FD_ZERO (&rfd);
688	FD_SET(respipe [0], &rfd);	419	FD_SET (respipe [0], &rfd);
689		420
690	select (respipe [0] + 1, &rfd, 0, 0, 0);	421	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
691	}	422	}
692	}	423	}
693		424
694	static int poll_cb ()	425	static int poll_cb (void)
695	{	426	{
696	dSP;	427	int res;
697	int count = 0;
698	int maxreqs = max_poll_reqs;
699	int do_croak = 0;
700	struct timeval tv_start, tv_now;
701	aio_req req;
702		428
703	if (max_poll_time)	429	do
704	gettimeofday (&tv_start, 0);
705
706	block_sig ();
707
708	for (;;)
709	{	430	{
710	for (;;)	431	res = eio_poll ();
711	{
712	maybe_start_thread ();
713		432
714	LOCK (reslock);	433	if (res > 0)
715	req = reqq_shift (&res_queue);
716
717	if (req)
718	{
719	--npending;
720
721	if (!res_queue.size)
722	{
723	/* read any signals sent by the worker threads */
724	char buf [4];
725	while (read (respipe [0], buf, 4) == 4)
726	;
727	}
728	}
729
730	UNLOCK (reslock);
731
732	if (!req)
733	break;
734
735	--nreqs;
736
737	if (req->type == REQ_GROUP && req->size)
738	{
739	req->int1 = 1; /* mark request as delayed */
740	continue;
741	}
742	else
743	{
744	if (!req_invoke (req))
745	{
746	req_free (req);
747	unblock_sig ();
748	croak (0);	434	croak (0);
749	}
750
751	count++;
752	}
753
754	req_free (req);
755
756	if (maxreqs && !--maxreqs)
757	break;
758
759	if (max_poll_time)
760	{
761	gettimeofday (&tv_now, 0);
762
763	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
764	break;
765	}
766	}
767
768	if (nreqs <= max_outstanding)
769	break;
770
771	poll_wait ();
772
773	++maxreqs;
774	}	435	}
775		436	while (max_outstanding && max_outstanding <= eio_nreqs ());
776	unblock_sig ();
777	return count;
778	}
779
780	static void create_pipe ()
781	{
782	if (pipe (respipe))
783	croak ("unable to initialize result pipe");
784
785	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
786	croak ("cannot set result pipe to nonblocking mode");
787
788	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790	}
791
792	/*****************************************************************************/
793	/* work around various missing functions */
794
795	#if !HAVE_PREADWRITE
796	# define pread aio_pread
797	# define pwrite aio_pwrite
798
799	/*
800	* make our pread/pwrite safe against themselves, but not against
801	* normal read/write by using a mutex. slows down execution a lot,
802	* but that's your problem, not mine.
803	*/
804	static mutex_t preadwritelock = MUTEX_INIT;
805
806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
807	{
808	ssize_t res;
809	off_t ooffset;
810
811	LOCK (preadwritelock);
812	ooffset = lseek (fd, 0, SEEK_CUR);
813	lseek (fd, offset, SEEK_SET);
814	res = read (fd, buf, count);
815	lseek (fd, ooffset, SEEK_SET);
816	UNLOCK (preadwritelock);
817		437
818	return res;	438	return res;
819	}	439	}
820		440
821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
822	{
823	ssize_t res;
824	off_t ooffset;
825
826	LOCK (preadwritelock);
827	ooffset = lseek (fd, 0, SEEK_CUR);
828	lseek (fd, offset, SEEK_SET);
829	res = write (fd, buf, count);
830	lseek (fd, offset, SEEK_SET);
831	UNLOCK (preadwritelock);
832
833	return res;
834	}
835	#endif
836
837	#if !HAVE_FDATASYNC
838	# define fdatasync fsync
839	#endif
840
841	#if !HAVE_READAHEAD
842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
843
844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
845	{
846	dBUF;
847
848	while (count > 0)
849	{
850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
851
852	pread (fd, aio_buf, len, offset);
853	offset += len;
854	count -= len;
855	}
856
857	errno = 0;
858	}
859
860	#endif
861
862	#if !HAVE_READDIR_R
863	# define readdir_r aio_readdir_r
864
865	static mutex_t readdirlock = MUTEX_INIT;
866
867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
868	{
869	struct dirent *e;
870	int errorno;
871
872	LOCK (readdirlock);
873
874	e = readdir (dirp);
875	errorno = errno;
876
877	if (e)
878	{
879	*res = ent;
880	strcpy (ent->d_name, e->d_name);
881	}
882	else
883	*res = 0;
884
885	UNLOCK (readdirlock);
886
887	errno = errorno;
888	return e ? 0 : -1;
889	}
890	#endif
891
892	/* sendfile always needs emulation */
893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
894	{
895	ssize_t res;
896
897	if (!count)
898	return 0;
899
900	#if HAVE_SENDFILE
901	# if __linux
902	res = sendfile (ofd, ifd, &offset, count);
903
904	# elif __freebsd
905	/*
906	* Of course, the freebsd sendfile is a dire hack with no thoughts
907	* wasted on making it similar to other I/O functions.
908	*/
909	{
910	off_t sbytes;
911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
912
913	if (res < 0 && sbytes)
914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
915	res = sbytes;
916	}
917
918	# elif __hpux
919	res = sendfile (ofd, ifd, offset, count, 0, 0);
920
921	# elif __solaris
922	{
923	struct sendfilevec vec;
924	size_t sbytes;
925
926	vec.sfv_fd = ifd;
927	vec.sfv_flag = 0;
928	vec.sfv_off = offset;
929	vec.sfv_len = count;
930
931	res = sendfilev (ofd, &vec, 1, &sbytes);
932
933	if (res < 0 && sbytes)
934	res = sbytes;
935	}
936
937	# endif
938	#else
939	res = -1;
940	errno = ENOSYS;
941	#endif
942
943	if (res < 0
944	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
945	#if __solaris
946	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
947	#endif
948	)
949	)
950	{
951	/* emulate sendfile. this is a major pain in the ass */
952	dBUF;
953
954	res = 0;
955
956	while (count)
957	{
958	ssize_t cnt;
959
960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
961
962	if (cnt <= 0)
963	{
964	if (cnt && !res) res = -1;
965	break;
966	}
967
968	cnt = write (ofd, aio_buf, cnt);
969
970	if (cnt <= 0)
971	{
972	if (cnt && !res) res = -1;
973	break;
974	}
975
976	offset += cnt;
977	res += cnt;
978	count -= cnt;
979	}
980	}
981
982	return res;
983	}
984
985	/* read a full directory */
986	static void scandir_ (aio_req req, worker *self)
987	{
988	DIR *dirp;
989	union
990	{
991	struct dirent d;
992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
993	} *u;
994	struct dirent *entp;
995	char *name, *names;
996	int memlen = 4096;
997	int memofs = 0;
998	int res = 0;
999	int errorno;
1000
1001	LOCK (wrklock);
1002	self->dirp = dirp = opendir (req->ptr1);
1003	self->dbuf = u = malloc (sizeof (*u));
1004	req->flags |= FLAG_PTR2_FREE;
1005	req->ptr2 = names = malloc (memlen);
1006	UNLOCK (wrklock);
1007
1008	if (dirp && u && names)
1009	for (;;)
1010	{
1011	errno = 0;
1012	readdir_r (dirp, &u->d, &entp);
1013
1014	if (!entp)
1015	break;
1016
1017	name = entp->d_name;
1018
1019	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1020	{
1021	int len = strlen (name) + 1;
1022
1023	res++;
1024
1025	while (memofs + len > memlen)
1026	{
1027	memlen *= 2;
1028	LOCK (wrklock);
1029	req->ptr2 = names = realloc (names, memlen);
1030	UNLOCK (wrklock);
1031
1032	if (!names)
1033	break;
1034	}
1035
1036	memcpy (names + memofs, name, len);
1037	memofs += len;
1038	}
1039	}
1040
1041	if (errno)
1042	res = -1;
1043
1044	req->result = res;
1045	}
1046
1047	/*****************************************************************************/
1048
1049	static void *aio_proc (void *thr_arg)
1050	{
1051	aio_req req;
1052	struct timespec ts;
1053	worker *self = (worker *)thr_arg;
1054
1055	/* try to distribute timeouts somewhat evenly */
1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1057	* (1000000000UL / 1024UL);
1058
1059	for (;;)
1060	{
1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1062
1063	LOCK (reqlock);
1064
1065	for (;;)
1066	{
1067	self->req = req = reqq_shift (&req_queue);
1068
1069	if (req)
1070	break;
1071
1072	++idle;
1073
1074	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1075	== ETIMEDOUT)
1076	{
1077	if (idle > max_idle)
1078	{
1079	--idle;
1080	UNLOCK (reqlock);
1081	LOCK (wrklock);
1082	--started;
1083	UNLOCK (wrklock);
1084	goto quit;
1085	}
1086
1087	/* we are allowed to idle, so do so without any timeout */
1088	COND_WAIT (reqwait, reqlock);
1089	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1090	}
1091
1092	--idle;
1093	}
1094
1095	--nready;
1096
1097	UNLOCK (reqlock);
1098
1099	errno = 0; /* strictly unnecessary */
1100
1101	if (!(req->flags & FLAG_CANCELLED))
1102	switch (req->type)
1103	{
1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1106
1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1109
1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1113
1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1115	case REQ_CLOSE: req->result = close (req->int1); break;
1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
1127	case REQ_READDIR: scandir_ (req, self); break;
1128
1129	case REQ_BUSY:
1130	{
1131	struct timeval tv;
1132
1133	tv.tv_sec = req->int1;
1134	tv.tv_usec = req->int2;
1135
1136	req->result = select (0, 0, 0, 0, &tv);
1137	}
1138
1139	case REQ_GROUP:
1140	case REQ_NOP:
1141	break;
1142
1143	case REQ_QUIT:
1144	goto quit;
1145
1146	default:
1147	req->result = ENOSYS;
1148	break;
1149	}
1150
1151	req->errorno = errno;
1152
1153	LOCK (reslock);
1154
1155	++npending;
1156
1157	if (!reqq_push (&res_queue, req))
1158	{
1159	/* write a dummy byte to the pipe so fh becomes ready */
1160	write (respipe [1], &respipe, 1);
1161
1162	/* optionally signal the main thread asynchronously */
1163	if (main_sig)
1164	pthread_kill (main_tid, main_sig);
1165	}
1166
1167	self->req = 0;
1168	worker_clear (self);
1169
1170	UNLOCK (reslock);
1171	}
1172
1173	quit:
1174	LOCK (wrklock);
1175	worker_free (self);
1176	UNLOCK (wrklock);
1177
1178	return 0;
1179	}
1180
1181	/*****************************************************************************/
1182
1183	static void atfork_prepare (void)
1184	{
1185	LOCK (wrklock);
1186	LOCK (reqlock);
1187	LOCK (reslock);
1188	#if !HAVE_PREADWRITE
1189	LOCK (preadwritelock);
1190	#endif
1191	#if !HAVE_READDIR_R
1192	LOCK (readdirlock);
1193	#endif
1194	}
1195
1196	static void atfork_parent (void)
1197	{
1198	#if !HAVE_READDIR_R
1199	UNLOCK (readdirlock);
1200	#endif
1201	#if !HAVE_PREADWRITE
1202	UNLOCK (preadwritelock);
1203	#endif
1204	UNLOCK (reslock);
1205	UNLOCK (reqlock);
1206	UNLOCK (wrklock);
1207	}
1208
1209	static void atfork_child (void)	441	static void atfork_child (void)
1210	{	442	{
1211	aio_req prv;
1212
1213	while (prv = reqq_shift (&req_queue))
1214	req_free (prv);
1215
1216	while (prv = reqq_shift (&res_queue))
1217	req_free (prv);
1218
1219	while (wrk_first.next != &wrk_first)
1220	{
1221	worker *wrk = wrk_first.next;
1222
1223	if (wrk->req)
1224	req_free (wrk->req);
1225
1226	worker_clear (wrk);
1227	worker_free (wrk);
1228	}
1229
1230	started = 0;
1231	idle = 0;
1232	nreqs = 0;
1233	nready = 0;
1234	npending = 0;
1235
1236	close (respipe [0]);
1237	close (respipe [1]);
1238	create_pipe ();	443	create_respipe ();
1239
1240	atfork_parent ();
1241	}	444	}
1242		445
1243	#define dREQ \	446	#define dREQ \
1244	aio_req req; \	447	aio_req req; \
1245	int req_pri = next_pri; \	448	int req_pri = next_pri; \
1246	next_pri = DEFAULT_PRI + PRI_BIAS; \	449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1247	\	450	\
1248	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
1249	croak ("callback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
1250	\	453	\
1251	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
1252	if (!req) \	455	if (!req) \
1253	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
1254	\	457	\
1255	req->callback = newSVsv (callback); \	458	req->callback = newSVsv (callback); \
1256	req->pri = req_pri	459	req->pri = req_pri
1257		460
1258	#define REQ_SEND \	461	#define REQ_SEND \
1259	req_send (req); \	462	req_submit (req); \
1260	\	463	\
1261	if (GIMME_V != G_VOID) \	464	if (GIMME_V != G_VOID) \
1262	XPUSHs (req_sv (req, AIO_REQ_KLASS));	465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1263		466
1264	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
1265		468
1266	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
1267		470
1268	BOOT:	471	BOOT:
1269	{	472	{
1270	HV *stash = gv_stashpv ("IO::AIO", 1);	473	stash = gv_stashpv ("IO::AIO", 1);
1271		474
1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	477	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	478	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	479	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		480	#ifdef _WIN32
		481	X_MUTEX_CHECK (wrklock);
		482	X_MUTEX_CHECK (reslock);
		483	X_MUTEX_CHECK (reqlock);
		484	X_MUTEX_CHECK (reqwait);
		485	X_MUTEX_CHECK (preadwritelock);
		486	X_MUTEX_CHECK (readdirlock);
		487
		488	X_COND_CHECK (reqwait);
		489	#else
1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));	491	#endif
1279		492
1280	create_pipe ();	493	create_respipe ();
1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);	494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
1282	}	500	}
1283		501
1284	void	502	void
1285	max_poll_reqs (int nreqs)	503	max_poll_reqs (int nreqs)
1286	PROTOTYPE: $	504	PROTOTYPE: $
1287	CODE:	505	CODE:
1288	max_poll_reqs = nreqs;	506	eio_set_max_poll_reqs (nreqs);
1289		507
1290	void	508	void
1291	max_poll_time (double nseconds)	509	max_poll_time (double nseconds)
1292	PROTOTYPE: $	510	PROTOTYPE: $
1293	CODE:	511	CODE:
1294	max_poll_time = nseconds * AIO_TICKS;	512	eio_set_max_poll_time (nseconds);
1295		513
1296	void	514	void
1297	min_parallel (int nthreads)	515	min_parallel (int nthreads)
1298	PROTOTYPE: $	516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
1299		519
1300	void	520	void
1301	max_parallel (int nthreads)	521	max_parallel (int nthreads)
1302	PROTOTYPE: $	522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
1303		525
1304	void	526	void
1305	max_idle (int nthreads)	527	max_idle (int nthreads)
1306	PROTOTYPE: $	528	PROTOTYPE: $
1307	CODE:	529	CODE:
1308	set_max_idle (nthreads);	530	eio_set_max_idle (nthreads);
1309		531
1310	int	532	void
1311	max_outstanding (int maxreqs)	533	max_outstanding (int maxreqs)
1312	PROTOTYPE: $	534	PROTOTYPE: $
1313	CODE:	535	CODE:
1314	RETVAL = max_outstanding;
1315	max_outstanding = maxreqs;	536	max_outstanding = maxreqs;
1316	OUTPUT:
1317	RETVAL
1318		537
1319	void	538	void
1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1321	SV8 * pathname
1322	int flags
1323	int mode
1324	SV * callback
1325	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
1326	PPCODE:	541	PPCODE:
1327	{	542	{
1328	dREQ;	543	dREQ;
1329		544
1330	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
1331	req->sv1 = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
1332	req->ptr1 = SvPVbyte_nolen (req->sv1);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
1333	req->int1 = flags;	548	req->int1 = flags;
1334	req->mode = mode;	549	req->int2 = mode;
1335		550
1336	REQ_SEND;	551	REQ_SEND;
1337	}	552	}
1338		553
1339	void	554	void
1340	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1341	SV * fh
1342	SV * callback
1343	PROTOTYPE: $;$	556	PROTOTYPE: $;$
1344	ALIAS:	557	ALIAS:
1345	aio_close = REQ_CLOSE
1346	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
1347	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
1348	PPCODE:	560	PPCODE:
1349	{	561	{
1350	dREQ;	562	dREQ;
1351		563
1352	req->type = ix;	564	req->type = ix;
1353	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1355		567
1356	REQ_SEND (req);	568	REQ_SEND (req);
1357	}	569	}
1358		570
1359	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1361	SV * fh
1362	UV offset
1363	UV length
1364	SV8 * data
1365	UV dataoffset
1366	SV * callback
1367	ALIAS:	601	ALIAS:
1368	aio_read = REQ_READ	602	aio_read = EIO_READ
1369	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
1370	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
1371	PPCODE:	605	PPCODE:
1372	{	606	{
1373	STRLEN svlen;	607	STRLEN svlen;
1374	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
1375		610
1376	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
1377	SvPOK_on (data);	612	SvPOK_on (data);
1378		613
1379	if (dataoffset < 0)	614	if (dataoffset < 0)
1380	dataoffset += svlen;	615	dataoffset += svlen;
1381		616
1382	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
1383	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
1384		619
1385	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
1386	{	621	{
1387	/* write: check length and adjust. */	622	/* write: check length and adjust. */
1388	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
1389	length = svlen - dataoffset;	624	len = svlen - dataoffset;
1390	}	625	}
1391	else	626	else
1392	{	627	{
1393	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
1394	svptr = SvGROW (data, length + dataoffset + 1);	629	svptr = SvGROW (data, len + dataoffset + 1);
1395	}	630	}
1396		631
1397	if (length < 0)	632	if (len < 0)
1398	croak ("length must not be negative");	633	croak ("length must not be negative");
1399		634
1400	{	635	{
1401	dREQ;	636	dREQ;
1402		637
1403	req->type = ix;	638	req->type = ix;
1404	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1406	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
1407	req->offs = offset;	642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1408	req->size = length;	643	req->size = len;
1409	req->sv1 = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
1410	req->ptr1 = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
1411	req->stroffset = dataoffset;	646	req->stroffset = dataoffset;
1412		647
1413	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1414	{	649	{
1415	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1416	req->flags |= FLAG_SV1_RO_OFF;	651	req->flags |= FLAG_SV2_RO_OFF;
1417	}	652	}
1418		653
1419	REQ_SEND;	654	REQ_SEND;
1420	}	655	}
1421	}	656	}
1422		657
1423	void	658	void
1424	aio_readlink (path,callback=&PL_sv_undef)	659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1425	SV8 * path
1426	SV * callback
1427	PROTOTYPE: $$;$	660	PROTOTYPE: $$;$
1428	PPCODE:	661	PPCODE:
1429	{	662	{
1430	SV *data;	663	SV *data;
1431	dREQ;	664	dREQ;
1432		665
1433	data = newSV (NAME_MAX);	666	data = newSV (NAME_MAX);
1434	SvPOK_on (data);	667	SvPOK_on (data);
1435		668
1436	req->type = REQ_READLINK;	669	req->type = EIO_READLINK;
1437	req->fh = newSVsv (path);	670	req->sv1 = newSVsv (path);
1438	req->ptr2 = SvPVbyte_nolen (req->fh);	671	req->ptr1 = SvPVbyte_nolen (req->sv1);
1439	req->sv1 = data;	672	req->sv2 = data;
1440	req->ptr1 = SvPVbyte_nolen (data);	673	req->ptr2 = SvPVbyte_nolen (data);
1441		674
1442	REQ_SEND;	675	REQ_SEND;
1443	}	676	}
1444		677
1445	void	678	void
1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	679	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1447	SV * out_fh
1448	SV * in_fh
1449	UV in_offset
1450	UV length
1451	SV * callback
1452	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
1453	PPCODE:	681	PPCODE:
1454	{	682	{
1455	dREQ;	683	dREQ;
1456		684
1457	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
1458	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1460	req->sv2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1462	req->offs = in_offset;	690	req->offs = SvVAL64 (in_offset);
1463	req->size = length;	691	req->size = length;
1464		692
1465	REQ_SEND;	693	REQ_SEND;
1466	}	694	}
1467		695
1468	void	696	void
1469	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1470	SV * fh
1471	UV offset
1472	IV length
1473	SV * callback
1474	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
1475	PPCODE:	699	PPCODE:
1476	{	700	{
1477	dREQ;	701	dREQ;
1478		702
1479	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
1480	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1482	req->offs = offset;	706	req->offs = SvVAL64 (offset);
1483	req->size = length;	707	req->size = length;
1484		708
1485	REQ_SEND;	709	REQ_SEND;
1486	}	710	}
1487		711
1488	void	712	void
1489	aio_stat (fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1490	SV8 * fh_or_path
1491	SV * callback
1492	ALIAS:	714	ALIAS:
1493	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
1494	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
1495	PPCODE:	717	PPCODE:
1496	{	718	{
1497	dREQ;	719	dREQ;
1498		720
1499	req->ptr2 = malloc (sizeof (Stat_t));	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1500	if (!req->ptr2)	722	if (!req->ptr2)
1501	{	723	{
1502	req_free (req);	724	req_destroy (req);
1503	croak ("out of memory during aio_stat statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
1504	}	726	}
1505		727
1506	req->flags |= FLAG_PTR2_FREE;	728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
1507		730
1508	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
1509	{	732	{
1510	req->type = ix;	733	req->type = ix;
1511	req->sv1 = newSVsv (fh_or_path);
1512	req->ptr1 = SvPVbyte_nolen (req->sv1);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
1513	}	735	}
1514	else	736	else
1515	{	737	{
1516	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
1517	req->fh = newSVsv (fh_or_path);
1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1519	}	740	}
1520		741
1521	REQ_SEND;	742	REQ_SEND;
1522	}	743	}
1523		744
1524	void	745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (fh_or_path))
		756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
		765
		766	REQ_SEND;
		767	}
		768
		769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (fh_or_path))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_fchmod = EIO_FCHMOD
		797	aio_mkdir = EIO_MKDIR
		798	PPCODE:
		799	{
		800	dREQ;
		801
		802	req->type = ix;
		803	req->int2 = mode;
		804	req->sv1 = newSVsv (fh_or_path);
		805
		806	if (ix == EIO_FCHMOD)
		807	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		808	else
		809	req->ptr1 = SvPVbyte_nolen (req->sv1);
		810
		811	REQ_SEND;
		812	}
		813
		814	void
		815	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		816	PPCODE:
		817	{
		818	dREQ;
		819
		820	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		821	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		822	req->sv1 = newSVsv (fh_or_path);
		823
		824	if (SvPOK (fh_or_path))
		825	{
		826	req->type = EIO_CHOWN;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FCHOWN;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
1525	aio_unlink (pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1526	SV8 * pathname
1527	SV * callback
1528	ALIAS:	840	ALIAS:
1529	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
1530	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
1531	aio_readdir = REQ_READDIR	843	aio_readdir = EIO_READDIR
1532	PPCODE:	844	PPCODE:
1533	{	845	{
1534	dREQ;	846	dREQ;
1535		847
1536	req->type = ix;	848	req->type = ix;
…		…
1539		851
1540	REQ_SEND;	852	REQ_SEND;
1541	}	853	}
1542		854
1543	void	855	void
1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)	856	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1545	SV8 * pathname	857	ALIAS:
1546	UV mode	858	aio_link = EIO_LINK
1547	SV * callback	859	aio_symlink = EIO_SYMLINK
		860	aio_rename = EIO_RENAME
1548	PPCODE:	861	PPCODE:
1549	{	862	{
1550	dREQ;	863	dREQ;
1551		864
		865	req->type = ix;
		866	req->sv1 = newSVsv (oldpath);
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	req->sv2 = newSVsv (newpath);
		869	req->ptr2 = SvPVbyte_nolen (req->sv2);
		870
		871	REQ_SEND;
		872	}
		873
		874	void
		875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
		879
1552	req->type = REQ_MKDIR;	880	req->type = EIO_MKNOD;
1553	req->sv1 = newSVsv (pathname);	881	req->sv1 = newSVsv (pathname);
1554	req->ptr1 = SvPVbyte_nolen (req->sv1);	882	req->ptr1 = SvPVbyte_nolen (req->sv1);
1555	req->mode = mode;
1556
1557	REQ_SEND;
1558	}
1559
1560	void
1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1562	SV8 * oldpath
1563	SV8 * newpath
1564	SV * callback
1565	ALIAS:
1566	aio_link = REQ_LINK
1567	aio_symlink = REQ_SYMLINK
1568	aio_rename = REQ_RENAME
1569	PPCODE:
1570	{
1571	dREQ;
1572
1573	req->type = ix;
1574	req->fh = newSVsv (oldpath);
1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1576	req->sv1 = newSVsv (newpath);
1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1578
1579	REQ_SEND;
1580	}
1581
1582	void
1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1584	SV8 * pathname
1585	UV mode
1586	UV dev
1587	SV * callback
1588	PPCODE:
1589	{
1590	dREQ;
1591
1592	req->type = REQ_MKNOD;
1593	req->sv1 = newSVsv (pathname);
1594	req->ptr1 = SvPVbyte_nolen (req->sv1);
1595	req->mode = (mode_t)mode;	883	req->int2 = (mode_t)mode;
1596	req->offs = dev;	884	req->offs = dev;
1597		885
1598	REQ_SEND;	886	REQ_SEND;
1599	}	887	}
1600		888
1601	void	889	void
1602	aio_busy (delay,callback=&PL_sv_undef)	890	aio_busy (double delay, SV *callback=&PL_sv_undef)
1603	double delay
1604	SV * callback
1605	PPCODE:	891	PPCODE:
1606	{	892	{
1607	dREQ;	893	dREQ;
1608		894
1609	req->type = REQ_BUSY;	895	req->type = EIO_BUSY;
1610	req->int1 = delay < 0. ? 0 : delay;	896	req->nv1 = delay < 0. ? 0. : delay;
1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1612		897
1613	REQ_SEND;	898	REQ_SEND;
1614	}	899	}
1615		900
1616	void	901	void
1617	aio_group (callback=&PL_sv_undef)	902	aio_group (SV *callback=&PL_sv_undef)
1618	SV * callback
1619	PROTOTYPE: ;$	903	PROTOTYPE: ;$
1620	PPCODE:	904	PPCODE:
1621	{	905	{
1622	dREQ;	906	dREQ;
1623		907
1624	req->type = REQ_GROUP;	908	req->type = EIO_GROUP;
1625		909
1626	req_send (req);	910	eio_submit (req);
1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));	911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1628	}	912	}
1629		913
1630	void	914	void
1631	aio_nop (callback=&PL_sv_undef)	915	aio_nop (SV *callback=&PL_sv_undef)
1632	SV * callback	916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
1633	PPCODE:	919	PPCODE:
1634	{	920	{
1635	dREQ;	921	dREQ;
1636		922
1637	req->type = REQ_NOP;	923	req->type = ix;
1638		924
1639	REQ_SEND;	925	REQ_SEND;
1640	}	926	}
1641		927
1642	int	928	int
1643	aioreq_pri (int pri = 0)	929	aioreq_pri (int pri = 0)
1644	PROTOTYPE: ;$	930	PROTOTYPE: ;$
1645	CODE:	931	CODE:
1646	RETVAL = next_pri - PRI_BIAS;	932	RETVAL = next_pri - EIO_PRI_BIAS;
1647	if (items > 0)	933	if (items > 0)
1648	{	934	{
1649	if (pri < PRI_MIN) pri = PRI_MIN;	935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1650	if (pri > PRI_MAX) pri = PRI_MAX;	936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1651	next_pri = pri + PRI_BIAS;	937	next_pri = pri + EIO_PRI_BIAS;
1652	}	938	}
1653	OUTPUT:	939	OUTPUT:
1654	RETVAL	940	RETVAL
1655		941
1656	void	942	void
1657	aioreq_nice (int nice = 0)	943	aioreq_nice (int nice = 0)
1658	CODE:	944	CODE:
1659	nice = next_pri - nice;	945	nice = next_pri - nice;
1660	if (nice < PRI_MIN) nice = PRI_MIN;	946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1661	if (nice > PRI_MAX) nice = PRI_MAX;	947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1662	next_pri = nice + PRI_BIAS;	948	next_pri = nice + EIO_PRI_BIAS;
1663		949
1664	void	950	void
1665	flush ()	951	flush ()
1666	PROTOTYPE:	952	PROTOTYPE:
1667	CODE:	953	CODE:
1668	while (nreqs)	954	while (eio_nreqs ())
1669	{	955	{
1670	poll_wait ();	956	poll_wait ();
1671	poll_cb ();	957	poll_cb ();
1672	}	958	}
1673		959
…		…
1700	poll_wait()	986	poll_wait()
1701	PROTOTYPE:	987	PROTOTYPE:
1702	CODE:	988	CODE:
1703	poll_wait ();	989	poll_wait ();
1704		990
1705	void
1706	setsig (int signum = SIGIO)
1707	PROTOTYPE: ;$
1708	CODE:
1709	{
1710	if (block_sig_level)
1711	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1712
1713	LOCK (reslock);
1714	main_tid = pthread_self ();
1715	main_sig = signum;
1716	UNLOCK (reslock);
1717
1718	if (main_sig && npending)
1719	pthread_kill (main_tid, main_sig);
1720	}
1721
1722	void
1723	aio_block (SV *cb)
1724	PROTOTYPE: &
1725	PPCODE:
1726	{
1727	int count;
1728
1729	block_sig ();
1730	PUSHMARK (SP);
1731	PUTBACK;
1732	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1733	SPAGAIN;
1734	unblock_sig ();
1735
1736	if (SvTRUE (ERRSV))
1737	croak (0);
1738
1739	XSRETURN (count);
1740	}
1741
1742	int	991	int
1743	nreqs()	992	nreqs()
1744	PROTOTYPE:	993	PROTOTYPE:
1745	CODE:	994	CODE:
1746	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
1747	OUTPUT:	996	OUTPUT:
1748	RETVAL	997	RETVAL
1749		998
1750	int	999	int
1751	nready()	1000	nready()
1752	PROTOTYPE:	1001	PROTOTYPE:
1753	CODE:	1002	CODE:
1754	RETVAL = get_nready ();	1003	RETVAL = eio_nready ();
1755	OUTPUT:	1004	OUTPUT:
1756	RETVAL	1005	RETVAL
1757		1006
1758	int	1007	int
1759	npending()	1008	npending()
1760	PROTOTYPE:	1009	PROTOTYPE:
1761	CODE:	1010	CODE:
1762	RETVAL = get_npending ();	1011	RETVAL = eio_npending ();
1763	OUTPUT:	1012	OUTPUT:
1764	RETVAL	1013	RETVAL
1765		1014
1766	int	1015	int
1767	nthreads()	1016	nthreads()
1768	PROTOTYPE:	1017	PROTOTYPE:
1769	CODE:	1018	CODE:
1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1019	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
1771	RETVAL = started;	1020	RETVAL = started;
1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);	1021	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
1773	OUTPUT:	1022	OUTPUT:
1774	RETVAL	1023	RETVAL
1775		1024
		1025	void _on_next_submit (SV *cb)
		1026	CODE:
		1027	SvREFCNT_dec (on_next_submit);
		1028	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1029
1776	PROTOTYPES: DISABLE	1030	PROTOTYPES: DISABLE
1777		1031
1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1779		1033
1780	void	1034	void
1781	cancel (aio_req_ornot req)	1035	cancel (aio_req_ornot req)
1782	CODE:	1036	CODE:
1783	req_cancel (req);	1037	eio_cancel (req);
1784		1038
1785	void	1039	void
1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1787	CODE:	1041	CODE:
1788	SvREFCNT_dec (req->callback);	1042	SvREFCNT_dec (req->callback);
…		…
1793	void	1047	void
1794	add (aio_req grp, ...)	1048	add (aio_req grp, ...)
1795	PPCODE:	1049	PPCODE:
1796	{	1050	{
1797	int i;	1051	int i;
1798	aio_req req;
1799
1800	if (main_sig && !block_sig_level)
1801	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1802		1052
1803	if (grp->int1 == 2)	1053	if (grp->int1 == 2)
1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1054	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1805		1055
1806	for (i = 1; i < items; ++i )	1056	for (i = 1; i < items; ++i )
1807	{	1057	{
		1058	aio_req req;
		1059
1808	if (GIMME_V != G_VOID)	1060	if (GIMME_V != G_VOID)
1809	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1810		1062
1811	req = SvAIO_REQ (ST (i));	1063	req = SvAIO_REQ (ST (i));
1812		1064
1813	if (req)	1065	if (req)
1814	{	1066	eio_grp_add (grp, req);
1815	++grp->size;
1816	req->grp = grp;
1817
1818	req->grp_prev = 0;
1819	req->grp_next = grp->grp_first;
1820
1821	if (grp->grp_first)
1822	grp->grp_first->grp_prev = req;
1823
1824	grp->grp_first = req;
1825	}
1826	}	1067	}
1827	}	1068	}
1828		1069
1829	void	1070	void
1830	cancel_subs (aio_req_ornot req)	1071	cancel_subs (aio_req_ornot req)
…		…
1855	grp->errorno = errorno;	1096	grp->errorno = errorno;
1856		1097
1857	void	1098	void
1858	limit (aio_req grp, int limit)	1099	limit (aio_req grp, int limit)
1859	CODE:	1100	CODE:
1860	grp->int2 = limit;	1101	eio_grp_limit (grp, limit);
1861	aio_grp_feed (grp);
1862		1102
1863	void	1103	void
1864	feed (aio_req grp, SV *callback=&PL_sv_undef)	1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
1865	CODE:	1105	CODE:
1866	{	1106	{
…		…
1868	grp->sv2 = newSVsv (callback);	1108	grp->sv2 = newSVsv (callback);
1869		1109
1870	if (grp->int2 <= 0)	1110	if (grp->int2 <= 0)
1871	grp->int2 = 2;	1111	grp->int2 = 2;
1872		1112
1873	aio_grp_feed (grp);	1113	eio_grp_limit (grp, grp->int2);
1874	}	1114	}
1875		1115

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