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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.69 by root, Tue Oct 24 11:57:30 2006 UTC vs.
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC

1	#if __linux	1	#include "xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "autoconf/config.h"
14		10
15	#include <pthread.h>
16
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>	14	#include <sys/time.h>
20	#include <sys/select.h>	15	#include <sys/select.h>
21	#include <sys/types.h>	16	#include <sys/types.h>
22	#include <sys/stat.h>	17	#include <sys/stat.h>
…		…
39	# else	34	# else
40	# error sendfile support requested but not available	35	# error sendfile support requested but not available
41	# endif	36	# endif
42	#endif	37	#endif
43		38
		39	/* number of seconds after which idle threads exit */
		40	#define IDLE_TIMEOUT 10
		41
44	/* used for struct dirent, AIX doesn't provide it */	42	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	43	#ifndef NAME_MAX
46	# define NAME_MAX 4096	44	# define NAME_MAX 4096
47	#endif	45	#endif
48		46
49	#if __ia64
50	# define STACKSIZE 65536
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN
53	#else
54	# define STACKSIZE 16384
55	#endif
56
57	/* buffer size for various temporary buffers */	47	/* buffer size for various temporary buffers */
58	#define AIO_BUFSIZE 65536	48	#define AIO_BUFSIZE 65536
59		49
60	#define dBUF \	50	#define dBUF \
		51	char *aio_buf; \
		52	LOCK (wrklock); \
61	char *aio_buf = malloc (AIO_BUFSIZE); \	53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		54	UNLOCK (wrklock); \
62	if (!aio_buf) \	55	if (!aio_buf) \
63	return -1;	56	return -1;
64		57
65	#define fBUF free (aio_buf)	58	typedef SV SV8; /* byte-sv, used for argument-checking */
66		59
67	enum {	60	enum {
68	REQ_QUIT,	61	REQ_QUIT,
69	REQ_OPEN, REQ_CLOSE,	62	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,	63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,	64	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,	66	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
75	REQ_READDIR,	68	REQ_MKNOD, REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,	69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
77	REQ_GROUP, REQ_NOP,	70	REQ_GROUP, REQ_NOP,
78	REQ_BUSY,	71	REQ_BUSY,
79	};	72	};
80		73
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	74	#define AIO_REQ_KLASS "IO::AIO::REQ"
…		…
83		76
84	typedef struct aio_cb	77	typedef struct aio_cb
85	{	78	{
86	struct aio_cb *volatile next;	79	struct aio_cb *volatile next;
87		80
88	SV *data, *callback;	81	SV *callback, *fh;
89	SV *fh, *fh2;	82	SV *sv1, *sv2;
90	void *dataptr, *data2ptr;	83	void *ptr1, *ptr2;
91	Stat_t *statdata;
92	off_t offset;	84	off_t offs;
93	size_t length;	85	size_t size;
94	ssize_t result;	86	ssize_t result;
95		87
96	STRLEN dataoffset;	88	STRLEN stroffset;
97	int type;	89	int type;
98	int fd, fd2;	90	int int1, int2;
99	int errorno;	91	int errorno;
100	mode_t mode; /* open */	92	mode_t mode; /* open */
101		93
102	unsigned char flags;	94	unsigned char flags;
103	unsigned char pri;	95	unsigned char pri;
…		…
105	SV *self; /* the perl counterpart of this request, if any */	97	SV *self; /* the perl counterpart of this request, if any */
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
107	} aio_cb;	99	} aio_cb;
108		100
109	enum {	101	enum {
110	FLAG_CANCELLED = 0x01,	102	FLAG_CANCELLED = 0x01, /* request was cancelled */
		103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
111	};	105	};
112		106
113	typedef aio_cb *aio_req;	107	typedef aio_cb *aio_req;
114	typedef aio_cb *aio_req_ornot;	108	typedef aio_cb *aio_req_ornot;
115		109
…		…
120	DEFAULT_PRI = 0,	114	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,	115	PRI_BIAS = -PRI_MIN,
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,	116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};	117	};
124		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
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;	165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126		166
127	static int started, wanted;	167	static unsigned int started, idle, wanted;
128	static volatile int nreqs;	168
129	static int max_outstanding = 1<<30;	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;
130	static int respipe [2];	212	static int respipe [2];
131		213
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	214	static mutex_t reslock = MUTEX_INIT;
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	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
134	#else	253	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	254
		255	# define get_nready() nready
		256	# define get_npending() npending
		257	# define get_nthreads() started
		258
136	#endif	259	#endif
137
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
141		260
142	/*	261	/*
143	* a somewhat faster data structure might be nice, but	262	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns	263	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.	264	* per shift, the most expensive operation.
…		…
191	}	310	}
192		311
193	abort ();	312	abort ();
194	}	313	}
195		314
		315	static int poll_cb ();
196	static void req_invoke (aio_req req);	316	static int req_invoke (aio_req req);
197	static void req_free (aio_req req);	317	static void req_free (aio_req req);
		318	static void req_cancel (aio_req req);
198		319
199	/* must be called at most once */	320	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	321	static SV *req_sv (aio_req req, const char *klass)
201	{	322	{
202	if (!req->self)	323	if (!req->self)
…		…
220	return mg ? (aio_req)mg->mg_ptr : 0;	341	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	342	}
222		343
223	static void aio_grp_feed (aio_req grp)	344	static void aio_grp_feed (aio_req grp)
224	{	345	{
		346	block_sig ();
		347
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
226	{	349	{
227	int old_len = grp->length;	350	int old_len = grp->size;
228		351
229	if (grp->fh2 && SvOK (grp->fh2))	352	if (grp->sv2 && SvOK (grp->sv2))
230	{	353	{
231	dSP;	354	dSP;
232		355
233	ENTER;	356	ENTER;
234	SAVETMPS;	357	SAVETMPS;
235	PUSHMARK (SP);	358	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
237	PUTBACK;	360	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	362	SPAGAIN;
240	FREETMPS;	363	FREETMPS;
241	LEAVE;	364	LEAVE;
242	}	365	}
243		366
244	/* stop if no progress has been made */	367	/* stop if no progress has been made */
245	if (old_len == grp->length)	368	if (old_len == grp->size)
246	{	369	{
247	SvREFCNT_dec (grp->fh2);	370	SvREFCNT_dec (grp->sv2);
248	grp->fh2 = 0;	371	grp->sv2 = 0;
249	break;	372	break;
250	}	373	}
251	}	374	}
		375
		376	unblock_sig ();
252	}	377	}
253		378
254	static void aio_grp_dec (aio_req grp)	379	static void aio_grp_dec (aio_req grp)
255	{	380	{
256	--grp->length;	381	--grp->size;
257		382
258	/* call feeder, if applicable */	383	/* call feeder, if applicable */
259	aio_grp_feed (grp);	384	aio_grp_feed (grp);
260		385
261	/* finish, if done */	386	/* finish, if done */
262	if (!grp->length && grp->fd)	387	if (!grp->size && grp->int1)
263	{	388	{
		389	block_sig ();
		390
264	req_invoke (grp);	391	if (!req_invoke (grp))
		392	{
		393	req_free (grp);
		394	unblock_sig ();
		395	croak (0);
		396	}
		397
265	req_free (grp);	398	req_free (grp);
		399	unblock_sig ();
266	}	400	}
267	}	401	}
268		402
269	static void poll_wait ()
270	{
271	fd_set rfd;
272
273	while (nreqs)
274	{
275	int size;
276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)	403	static int req_invoke (aio_req req)
295	{	404	{
296	dSP;	405	dSP;
		406
		407	if (req->flags & FLAG_SV1_RO_OFF)
		408	SvREADONLY_off (req->sv1);
297		409
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299	{	411	{
300	errno = req->errorno;
301
302	ENTER;	412	ENTER;
303	SAVETMPS;	413	SAVETMPS;
304	PUSHMARK (SP);	414	PUSHMARK (SP);
305	EXTEND (SP, 1);	415	EXTEND (SP, 1);
306		416
…		…
310	{	420	{
311	SV *rv = &PL_sv_undef;	421	SV *rv = &PL_sv_undef;
312		422
313	if (req->result >= 0)	423	if (req->result >= 0)
314	{	424	{
		425	int i;
315	char *buf = req->data2ptr;	426	char *buf = req->ptr2;
316	AV *av = newAV ();	427	AV *av = newAV ();
317		428
318	while (req->result)	429	av_extend (av, req->result - 1);
		430
		431	for (i = 0; i < req->result; ++i)
319	{	432	{
320	SV *sv = newSVpv (buf, 0);	433	SV *sv = newSVpv (buf, 0);
321		434
322	av_push (av, sv);	435	av_store (av, i, sv);
323	buf += SvCUR (sv) + 1;	436	buf += SvCUR (sv) + 1;
324	req->result--;
325	}	437	}
326		438
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	439	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	440	}
329		441
…		…
339	PUSHs (sv_2mortal (newSViv (req->result)));	451	PUSHs (sv_2mortal (newSViv (req->result)));
340	PUTBACK;	452	PUTBACK;
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
342	SPAGAIN;	454	SPAGAIN;
343		455
344	fh = SvREFCNT_inc (POPs);	456	fh = POPs;
345
346	PUSHMARK (SP);	457	PUSHMARK (SP);
347	XPUSHs (sv_2mortal (fh));	458	XPUSHs (fh);
348	}	459	}
349	break;	460	break;
350		461
351	case REQ_GROUP:	462	case REQ_GROUP:
352	req->fd = 2; /* mark group as finished */	463	req->int1 = 2; /* mark group as finished */
353		464
354	if (req->data)	465	if (req->sv1)
355	{	466	{
356	int i;	467	int i;
357	AV *av = (AV *)req->data;	468	AV *av = (AV *)req->sv1;
358		469
359	EXTEND (SP, AvFILL (av) + 1);	470	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	471	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	472	PUSHs (*av_fetch (av, i, 0));
362	}	473	}
…		…
364		475
365	case REQ_NOP:	476	case REQ_NOP:
366	case REQ_BUSY:	477	case REQ_BUSY:
367	break;	478	break;
368		479
		480	case REQ_READLINK:
		481	if (req->result > 0)
		482	{
		483	SvCUR_set (req->sv1, req->result);
		484	*SvEND (req->sv1) = 0;
		485	PUSHs (req->sv1);
		486	}
		487	break;
		488
		489	case REQ_STAT:
		490	case REQ_LSTAT:
		491	case REQ_FSTAT:
		492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		493	PL_laststatval = req->result;
		494	PL_statcache = *(Stat_t *)(req->ptr2);
		495	PUSHs (sv_2mortal (newSViv (req->result)));
		496	break;
		497
		498	case REQ_READ:
		499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		500	*SvEND (req->sv1) = 0;
		501	PUSHs (sv_2mortal (newSViv (req->result)));
		502	break;
		503
369	default:	504	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	505	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	506	break;
372	}	507	}
373		508
		509	errno = req->errorno;
374		510
375	PUTBACK;	511	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	512	call_sv (req->callback, G_VOID | G_EVAL);
377	SPAGAIN;	513	SPAGAIN;
378		514
…		…
392	grp->grp_first = req->grp_next;	528	grp->grp_first = req->grp_next;
393		529
394	aio_grp_dec (grp);	530	aio_grp_dec (grp);
395	}	531	}
396		532
397	if (SvTRUE (ERRSV))	533	return !SvTRUE (ERRSV);
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	534	}
403		535
404	static void req_free (aio_req req)	536	static void req_free (aio_req req)
405	{	537	{
406	if (req->self)	538	if (req->self)
407	{	539	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
410	}	542	}
411		543
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
		545	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417		548
418	if (req->type == REQ_READDIR && req->result >= 0)	549	if (req->flags & FLAG_PTR2_FREE)
419	free (req->data2ptr);	550	free (req->ptr2);
420		551
421	Safefree (req);	552	Safefree (req);
422	}	553	}
423		554
		555	static void req_cancel_subs (aio_req grp)
		556	{
		557	aio_req sub;
		558
		559	if (grp->type != REQ_GROUP)
		560	return;
		561
		562	SvREFCNT_dec (grp->sv2);
		563	grp->sv2 = 0;
		564
		565	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		566	req_cancel (sub);
		567	}
		568
424	static void req_cancel (aio_req req)	569	static void req_cancel (aio_req req)
425	{	570	{
426	req->flags |= FLAG_CANCELLED;	571	req->flags |= FLAG_CANCELLED;
427		572
428	if (req->type == REQ_GROUP)	573	req_cancel_subs (req);
		574	}
		575
		576	static void *aio_proc(void *arg);
		577
		578	static void start_thread (void)
		579	{
		580	worker *wrk = calloc (1, sizeof (worker));
		581
		582	if (!wrk)
		583	croak ("unable to allocate worker thread data");
		584
		585	LOCK (wrklock);
		586
		587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
429	{	588	{
430	aio_req sub;	589	wrk->prev = &wrk_first;
		590	wrk->next = wrk_first.next;
		591	wrk_first.next->prev = wrk;
		592	wrk_first.next = wrk;
		593	++started;
		594	}
		595	else
		596	free (wrk);
431		597
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	598	UNLOCK (wrklock);
433	req_cancel (sub);	599	}
		600
		601	static void maybe_start_thread ()
		602	{
		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	}
		612
		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 ()
		672	{
		673	fd_set rfd;
		674
		675	while (nreqs)
		676	{
		677	int size;
		678	if (WORDACCESS_UNSAFE) LOCK (reslock);
		679	size = res_queue.size;
		680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		681
		682	if (size)
		683	return;
		684
		685	maybe_start_thread ();
		686
		687	FD_ZERO(&rfd);
		688	FD_SET(respipe [0], &rfd);
		689
		690	select (respipe [0] + 1, &rfd, 0, 0, 0);
434	}	691	}
435	}	692	}
436		693
437	static int poll_cb ()	694	static int poll_cb ()
438	{	695	{
439	dSP;	696	dSP;
440	int count = 0;	697	int count = 0;
		698	int maxreqs = max_poll_reqs;
441	int do_croak = 0;	699	int do_croak = 0;
		700	struct timeval tv_start, tv_now;
442	aio_req req;	701	aio_req req;
		702
		703	if (max_poll_time)
		704	gettimeofday (&tv_start, 0);
		705
		706	block_sig ();
443		707
444	for (;;)	708	for (;;)
445	{	709	{
446	pthread_mutex_lock (&reslock);	710	for (;;)
447	req = reqq_shift (&res_queue);
448
449	if (req)
450	{	711	{
		712	maybe_start_thread ();
		713
		714	LOCK (reslock);
		715	req = reqq_shift (&res_queue);
		716
451	if (!res_queue.size)	717	if (req)
452	{	718	{
		719	--npending;
		720
		721	if (!res_queue.size)
		722	{
453	/* read any signals sent by the worker threads */	723	/* read any signals sent by the worker threads */
454	char buf [32];	724	char buf [4];
455	while (read (respipe [0], buf, 32) == 32)	725	while (read (respipe [0], buf, 4) == 4)
		726	;
456	;	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);
		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;
457	}	765	}
458	}	766	}
459		767
460	pthread_mutex_unlock (&reslock);	768	if (nreqs <= max_outstanding)
461
462	if (!req)
463	break;	769	break;
464		770
465	--nreqs;	771	poll_wait ();
466		772
467	if (req->type == REQ_QUIT)	773	++maxreqs;
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{
471	req->fd = 1; /* mark request as delayed */
472	continue;
473	}
474	else
475	{
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	774	}
496		775
		776	unblock_sig ();
497	return count;	777	return count;
498	}
499
500	static void *aio_proc(void *arg);
501
502	static void start_thread (void)
503	{
504	sigset_t fullsigset, oldsigset;
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}
520
521	static void req_send (aio_req req)
522	{
523	while (started < wanted && nreqs >= started)
524	start_thread ();
525
526	++nreqs;
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{
572	end_thread ();
573	cur--;
574	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}	778	}
582		779
583	static void create_pipe ()	780	static void create_pipe ()
584	{	781	{
585	if (pipe (respipe))	782	if (pipe (respipe))
…		…
602	/*	799	/*
603	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
604	* normal read/write by using a mutex. slows down execution a lot,	801	* normal read/write by using a mutex. slows down execution a lot,
605	* but that's your problem, not mine.	802	* but that's your problem, not mine.
606	*/	803	*/
607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
608		805
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{	807	{
611	ssize_t res;	808	ssize_t res;
612	off_t ooffset;	809	off_t ooffset;
613		810
614	pthread_mutex_lock (&preadwritelock);	811	LOCK (preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);	812	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);	813	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);	814	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);	815	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);	816	UNLOCK (preadwritelock);
620		817
621	return res;	818	return res;
622	}	819	}
623		820
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{	822	{
626	ssize_t res;	823	ssize_t res;
627	off_t ooffset;	824	off_t ooffset;
628		825
629	pthread_mutex_lock (&preadwritelock);	826	LOCK (preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);	827	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);	829	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);	830	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);	831	UNLOCK (preadwritelock);
635		832
636	return res;	833	return res;
637	}	834	}
638	#endif	835	#endif
639		836
640	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
641	# define fdatasync fsync	838	# define fdatasync fsync
642	#endif	839	#endif
643		840
644	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
645	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
646		843
647	static ssize_t readahead (int fd, off_t offset, size_t count)	844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
648	{	845	{
649	dBUF;	846	dBUF;
650		847
651	while (count > 0)	848	while (count > 0)
652	{	849	{
…		…
655	pread (fd, aio_buf, len, offset);	852	pread (fd, aio_buf, len, offset);
656	offset += len;	853	offset += len;
657	count -= len;	854	count -= len;
658	}	855	}
659		856
660	fBUF;
661
662	errno = 0;	857	errno = 0;
663	}	858	}
		859
664	#endif	860	#endif
665		861
666	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
668		864
669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
670		866
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672	{	868	{
673	struct dirent *e;	869	struct dirent *e;
674	int errorno;	870	int errorno;
675		871
676	pthread_mutex_lock (&readdirlock);	872	LOCK (readdirlock);
677		873
678	e = readdir (dirp);	874	e = readdir (dirp);
679	errorno = errno;	875	errorno = errno;
680		876
681	if (e)	877	if (e)
…		…
684	strcpy (ent->d_name, e->d_name);	880	strcpy (ent->d_name, e->d_name);
685	}	881	}
686	else	882	else
687	*res = 0;	883	*res = 0;
688		884
689	pthread_mutex_unlock (&readdirlock);	885	UNLOCK (readdirlock);
690		886
691	errno = errorno;	887	errno = errorno;
692	return e ? 0 : -1;	888	return e ? 0 : -1;
693	}	889	}
694	#endif	890	#endif
695		891
696	/* sendfile always needs emulation */	892	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
698	{	894	{
699	ssize_t res;	895	ssize_t res;
700		896
701	if (!count)	897	if (!count)
702	return 0;	898	return 0;
…		…
713	{	909	{
714	off_t sbytes;	910	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716		912
717	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
719	res = sbytes;	915	res = sbytes;
720	}	916	}
721		917
722	# elif __hpux	918	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
779		975
780	offset += cnt;	976	offset += cnt;
781	res += cnt;	977	res += cnt;
782	count -= cnt;	978	count -= cnt;
783	}	979	}
784
785	fBUF;
786	}	980	}
787		981
788	return res;	982	return res;
789	}	983	}
790		984
791	/* read a full directory */	985	/* read a full directory */
792	static int scandir_ (const char *path, void **namesp)	986	static void scandir_ (aio_req req, worker *self)
793	{	987	{
794	DIR *dirp;	988	DIR *dirp;
795	union	989	union
796	{	990	{
797	struct dirent d;	991	struct dirent d;
…		…
802	int memlen = 4096;	996	int memlen = 4096;
803	int memofs = 0;	997	int memofs = 0;
804	int res = 0;	998	int res = 0;
805	int errorno;	999	int errorno;
806		1000
807	dirp = opendir (path);	1001	LOCK (wrklock);
808	if (!dirp)	1002	self->dirp = dirp = opendir (req->ptr1);
809	return -1;
810
811	u = malloc (sizeof (*u));	1003	self->dbuf = u = malloc (sizeof (*u));
		1004	req->flags |= FLAG_PTR2_FREE;
812	names = malloc (memlen);	1005	req->ptr2 = names = malloc (memlen);
		1006	UNLOCK (wrklock);
813		1007
814	if (u && names)	1008	if (dirp && u && names)
815	for (;;)	1009	for (;;)
816	{	1010	{
817	errno = 0;	1011	errno = 0;
818	readdir_r (dirp, &u->d, &entp);	1012	readdir_r (dirp, &u->d, &entp);
819		1013
…		…
829	res++;	1023	res++;
830		1024
831	while (memofs + len > memlen)	1025	while (memofs + len > memlen)
832	{	1026	{
833	memlen *= 2;	1027	memlen *= 2;
		1028	LOCK (wrklock);
834	names = realloc (names, memlen);	1029	req->ptr2 = names = realloc (names, memlen);
		1030	UNLOCK (wrklock);
		1031
835	if (!names)	1032	if (!names)
836	break;	1033	break;
837	}	1034	}
838		1035
839	memcpy (names + memofs, name, len);	1036	memcpy (names + memofs, name, len);
840	memofs += len;	1037	memofs += len;
841	}	1038	}
842	}	1039	}
843		1040
844	errorno = errno;
845	free (u);
846	closedir (dirp);
847
848	if (errorno)	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 (;;)
849	{	1060	{
850	free (names);	1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
851	errno = errorno;
852	res = -1;
853	}
854		1062
855	*namesp = (void *)names;	1063	LOCK (reqlock);
856	return res;
857	}
858
859	/*****************************************************************************/
860
861	static void *aio_proc (void *thr_arg)
862	{
863	aio_req req;
864	int type;
865
866	do
867	{
868	pthread_mutex_lock (&reqlock);
869		1064
870	for (;;)	1065	for (;;)
871	{	1066	{
872	req = reqq_shift (&req_queue);	1067	self->req = req = reqq_shift (&req_queue);
873		1068
874	if (req)	1069	if (req)
875	break;	1070	break;
876		1071
877	pthread_cond_wait (&reqwait, &reqlock);	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;
878	}	1093	}
879		1094
880	pthread_mutex_unlock (&reqlock);	1095	--nready;
		1096
		1097	UNLOCK (reqlock);
881		1098
882	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884		1100
885	if (!(req->flags & FLAG_CANCELLED))	1101	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)	1102	switch (req->type)
887	{	1103	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
890		1106
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
893		1109
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
897		1113
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;	1115	case REQ_CLOSE: req->result = close (req->int1); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); 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;
905		1124
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
909		1128
910	case REQ_BUSY:	1129	case REQ_BUSY:
911	{	1130	{
912	struct timeval tv;	1131	struct timeval tv;
913		1132
914	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
915	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
916		1135
917	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
918	}	1137	}
919		1138
920	case REQ_GROUP:	1139	case REQ_GROUP:
921	case REQ_NOP:	1140	case REQ_NOP:
		1141	break;
		1142
922	case REQ_QUIT:	1143	case REQ_QUIT:
923	break;	1144	goto quit;
924		1145
925	default:	1146	default:
926	req->result = ENOSYS;	1147	req->result = ENOSYS;
927	break;	1148	break;
928	}	1149	}
929		1150
930	req->errorno = errno;	1151	req->errorno = errno;
931		1152
932	pthread_mutex_lock (&reslock);	1153	LOCK (reslock);
		1154
		1155	++npending;
933		1156
934	if (!reqq_push (&res_queue, req))	1157	if (!reqq_push (&res_queue, req))
		1158	{
935	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);	1160	write (respipe [1], &respipe, 1);
937		1161
938	pthread_mutex_unlock (&reslock);	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);
939	}	1171	}
940	while (type != REQ_QUIT);	1172
		1173	quit:
		1174	LOCK (wrklock);
		1175	worker_free (self);
		1176	UNLOCK (wrklock);
941		1177
942	return 0;	1178	return 0;
943	}	1179	}
944		1180
945	/*****************************************************************************/	1181	/*****************************************************************************/
946		1182
947	static void atfork_prepare (void)	1183	static void atfork_prepare (void)
948	{	1184	{
949	pthread_mutex_lock (&reqlock);	1185	LOCK (wrklock);
950	pthread_mutex_lock (&reslock);	1186	LOCK (reqlock);
		1187	LOCK (reslock);
951	#if !HAVE_PREADWRITE	1188	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);	1189	LOCK (preadwritelock);
953	#endif	1190	#endif
954	#if !HAVE_READDIR_R	1191	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);	1192	LOCK (readdirlock);
956	#endif	1193	#endif
957	}	1194	}
958		1195
959	static void atfork_parent (void)	1196	static void atfork_parent (void)
960	{	1197	{
961	#if !HAVE_READDIR_R	1198	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);	1199	UNLOCK (readdirlock);
963	#endif	1200	#endif
964	#if !HAVE_PREADWRITE	1201	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);	1202	UNLOCK (preadwritelock);
966	#endif	1203	#endif
967	pthread_mutex_unlock (&reslock);	1204	UNLOCK (reslock);
968	pthread_mutex_unlock (&reqlock);	1205	UNLOCK (reqlock);
		1206	UNLOCK (wrklock);
969	}	1207	}
970		1208
971	static void atfork_child (void)	1209	static void atfork_child (void)
972	{	1210	{
973	aio_req prv;	1211	aio_req prv;
974
975	started = 0;
976		1212
977	while (prv = reqq_shift (&req_queue))	1213	while (prv = reqq_shift (&req_queue))
978	req_free (prv);	1214	req_free (prv);
979		1215
980	while (prv = reqq_shift (&res_queue))	1216	while (prv = reqq_shift (&res_queue))
981	req_free (prv);	1217	req_free (prv);
982		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
983	close (respipe [0]);	1236	close (respipe [0]);
984	close (respipe [1]);	1237	close (respipe [1]);
985	create_pipe ();	1238	create_pipe ();
986		1239
987	atfork_parent ();	1240	atfork_parent ();
…		…
1013	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
1014		1267
1015	BOOT:	1268	BOOT:
1016	{	1269	{
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1021		1279
1022	create_pipe ();	1280	create_pipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
1024	}	1282	}
1025		1283
1026	void	1284	void
1027	min_parallel (nthreads)	1285	max_poll_reqs (int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
1030		1289
1031	void	1290	void
1032	max_parallel (nthreads)	1291	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	1292	PROTOTYPE: $
		1293	CODE:
		1294	max_poll_time = nseconds * AIO_TICKS;
		1295
		1296	void
		1297	min_parallel (int nthreads)
		1298	PROTOTYPE: $
		1299
		1300	void
		1301	max_parallel (int nthreads)
		1302	PROTOTYPE: $
		1303
		1304	void
		1305	max_idle (int nthreads)
		1306	PROTOTYPE: $
		1307	CODE:
		1308	set_max_idle (nthreads);
1035		1309
1036	int	1310	int
1037	max_outstanding (nreqs)	1311	max_outstanding (int maxreqs)
1038	int nreqs	1312	PROTOTYPE: $
1039	PROTOTYPE: $
1040	CODE:	1313	CODE:
1041	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
1042	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
1043		1318
1044	void	1319	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1046	SV * pathname	1321	SV8 * pathname
1047	int flags	1322	int flags
1048	int mode	1323	int mode
1049	SV * callback	1324	SV * callback
1050	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
1051	PPCODE:	1326	PPCODE:
1052	{	1327	{
1053	dREQ;	1328	dREQ;
1054		1329
1055	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
1056	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	1333	req->int1 = flags;
1059	req->mode = mode;	1334	req->mode = mode;
1060		1335
1061	REQ_SEND;	1336	REQ_SEND;
1062	}	1337	}
1063		1338
…		…
1073	PPCODE:	1348	PPCODE:
1074	{	1349	{
1075	dREQ;	1350	dREQ;
1076		1351
1077	req->type = ix;	1352	req->type = ix;
1078	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1080		1355
1081	REQ_SEND (req);	1356	REQ_SEND (req);
1082	}	1357	}
1083		1358
1084	void	1359	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1086	SV * fh	1361	SV * fh
1087	UV offset	1362	UV offset
1088	UV length	1363	UV length
1089	SV * data	1364	SV8 * data
1090	UV dataoffset	1365	UV dataoffset
1091	SV * callback	1366	SV * callback
1092	ALIAS:	1367	ALIAS:
1093	aio_read = REQ_READ	1368	aio_read = REQ_READ
1094	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
1095	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
1096	PPCODE:	1371	PPCODE:
1097	{	1372	{
1098	aio_req req;
1099	STRLEN svlen;	1373	STRLEN svlen;
1100	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
1101		1375
1102	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
1115	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
1116	}	1390	}
1117	else	1391	else
1118	{	1392	{
1119	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
1121	}	1395	}
1122		1396
1123	if (length < 0)	1397	if (length < 0)
1124	croak ("length must not be negative");	1398	croak ("length must not be negative");
1125		1399
1126	{	1400	{
1127	dREQ;	1401	dREQ;
1128		1402
1129	req->type = ix;	1403	req->type = ix;
1130	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
1133	req->offset = offset;	1407	req->offs = offset;
1134	req->length = length;	1408	req->size = length;
1135	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
1137		1412
1138	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
1139	{	1414	{
1140	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
1142	}	1417	}
1143		1418
1144	REQ_SEND;	1419	REQ_SEND;
1145	}	1420	}
		1421	}
		1422
		1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		1428	PPCODE:
		1429	{
		1430	SV *data;
		1431	dREQ;
		1432
		1433	data = newSV (NAME_MAX);
		1434	SvPOK_on (data);
		1435
		1436	req->type = REQ_READLINK;
		1437	req->fh = newSVsv (path);
		1438	req->ptr2 = SvPVbyte_nolen (req->fh);
		1439	req->sv1 = data;
		1440	req->ptr1 = SvPVbyte_nolen (data);
		1441
		1442	REQ_SEND;
1146	}	1443	}
1147		1444
1148	void	1445	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1150	SV * out_fh	1447	SV * out_fh
…		…
1156	PPCODE:	1453	PPCODE:
1157	{	1454	{
1158	dREQ;	1455	dREQ;
1159		1456
1160	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
1161	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1163	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1165	req->offset = in_offset;	1462	req->offs = in_offset;
1166	req->length = length;	1463	req->size = length;
1167		1464
1168	REQ_SEND;	1465	REQ_SEND;
1169	}	1466	}
1170		1467
1171	void	1468	void
…		…
1178	PPCODE:	1475	PPCODE:
1179	{	1476	{
1180	dREQ;	1477	dREQ;
1181		1478
1182	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
1183	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1185	req->offset = offset;	1482	req->offs = offset;
1186	req->length = length;	1483	req->size = length;
1187		1484
1188	REQ_SEND;	1485	REQ_SEND;
1189	}	1486	}
1190		1487
1191	void	1488	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
1193	SV * fh_or_path	1490	SV8 * fh_or_path
1194	SV * callback	1491	SV * callback
1195	ALIAS:	1492	ALIAS:
1196	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
1197	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
1198	PPCODE:	1495	PPCODE:
1199	{	1496	{
1200	dREQ;	1497	dREQ;
1201		1498
1202	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
1203	if (!req->statdata)	1500	if (!req->ptr2)
1204	{	1501	{
1205	req_free (req);	1502	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
1207	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
1208		1507
1209	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
1210	{	1509	{
1211	req->type = ix;	1510	req->type = ix;
1212	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	1513	}
1215	else	1514	else
1216	{	1515	{
1217	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
1218	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	1519	}
1221		1520
1222	REQ_SEND;	1521	REQ_SEND;
1223	}	1522	}
1224		1523
1225	void	1524	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
1227	SV * pathname	1526	SV8 * pathname
1228	SV * callback	1527	SV * callback
1229	ALIAS:	1528	ALIAS:
1230	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
1231	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
1232	aio_readdir = REQ_READDIR	1531	aio_readdir = REQ_READDIR
1233	PPCODE:	1532	PPCODE:
1234	{	1533	{
1235	dREQ;	1534	dREQ;
1236		1535
1237	req->type = ix;	1536	req->type = ix;
1238	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	1538	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1539
		1540	REQ_SEND;
		1541	}
		1542
		1543	void
		1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
		1545	SV8 * pathname
		1546	UV mode
		1547	SV * callback
		1548	PPCODE:
		1549	{
		1550	dREQ;
1240		1551
		1552	req->type = REQ_MKDIR;
		1553	req->sv1 = newSVsv (pathname);
		1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1555	req->mode = mode;
		1556
1241	REQ_SEND;	1557	REQ_SEND;
1242	}	1558	}
1243		1559
1244	void	1560	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1246	SV * oldpath	1562	SV8 * oldpath
1247	SV * newpath	1563	SV8 * newpath
1248	SV * callback	1564	SV * callback
1249	ALIAS:	1565	ALIAS:
1250	aio_link = REQ_LINK	1566	aio_link = REQ_LINK
1251	aio_symlink = REQ_SYMLINK	1567	aio_symlink = REQ_SYMLINK
1252	aio_rename = REQ_RENAME	1568	aio_rename = REQ_RENAME
1253	PPCODE:	1569	PPCODE:
1254	{	1570	{
1255	dREQ;	1571	dREQ;
1256		1572
1257	req->type = ix;	1573	req->type = ix;
1258	req->fh = newSVsv (oldpath);	1574	req->fh = newSVsv (oldpath);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1260	req->data = newSVsv (newpath);	1576	req->sv1 = newSVsv (newpath);
1261	req->dataptr = SvPVbyte_nolen (req->data);	1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1262		1578
1263	REQ_SEND;	1579	REQ_SEND;
1264	}	1580	}
1265		1581
1266	void	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;
		1596	req->offs = dev;
		1597
		1598	REQ_SEND;
		1599	}
		1600
		1601	void
1267	aio_busy (delay,callback=&PL_sv_undef)	1602	aio_busy (delay,callback=&PL_sv_undef)
1268	double delay	1603	double delay
1269	SV * callback	1604	SV * callback
1270	PPCODE:	1605	PPCODE:
1271	{	1606	{
1272	dREQ;	1607	dREQ;
1273		1608
1274	req->type = REQ_BUSY;	1609	req->type = REQ_BUSY;
1275	req->fd = delay < 0. ? 0 : delay;	1610	req->int1 = delay < 0. ? 0 : delay;
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1277		1612
1278	REQ_SEND;	1613	REQ_SEND;
1279	}	1614	}
1280		1615
1281	void	1616	void
…		…
1285	PPCODE:	1620	PPCODE:
1286	{	1621	{
1287	dREQ;	1622	dREQ;
1288		1623
1289	req->type = REQ_GROUP;	1624	req->type = REQ_GROUP;
		1625
1290	req_send (req);	1626	req_send (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1293	}	1628	}
1294		1629
1295	void	1630	void
1296	aio_nop (callback=&PL_sv_undef)	1631	aio_nop (callback=&PL_sv_undef)
1297	SV * callback	1632	SV * callback
1298	PPCODE:	1633	PPCODE:
1299	{	1634	{
1300	dREQ;	1635	dREQ;
1301		1636
1302	req->type = REQ_NOP;	1637	req->type = REQ_NOP;
1303		1638
1304	REQ_SEND;	1639	REQ_SEND;
1305	}	1640	}
1306		1641
1307	void	1642	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1643	aioreq_pri (int pri = 0)
1309	CODE:	1644	PROTOTYPE: ;$
		1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1649	if (pri < PRI_MIN) pri = PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1650	if (pri > PRI_MAX) pri = PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
1313		1655
1314	void	1656	void
1315	aioreq_nice (int nice = 0)	1657	aioreq_nice (int nice = 0)
1316	CODE:	1658	CODE:
1317	nice = next_pri - nice;	1659	nice = next_pri - nice;
1318	if (nice < PRI_MIN) nice = PRI_MIN;	1660	if (nice < PRI_MIN) nice = PRI_MIN;
1319	if (nice > PRI_MAX) nice = PRI_MAX;	1661	if (nice > PRI_MAX) nice = PRI_MAX;
1320	next_pri = nice + PRI_BIAS;	1662	next_pri = nice + PRI_BIAS;
1321		1663
1322	void	1664	void
1323	flush ()	1665	flush ()
1324	PROTOTYPE:	1666	PROTOTYPE:
1325	CODE:	1667	CODE:
…		…
1327	{	1669	{
1328	poll_wait ();	1670	poll_wait ();
1329	poll_cb ();	1671	poll_cb ();
1330	}	1672	}
1331		1673
1332	void	1674	int
1333	poll()	1675	poll()
1334	PROTOTYPE:	1676	PROTOTYPE:
1335	CODE:	1677	CODE:
1336	if (nreqs)
1337	{
1338	poll_wait ();	1678	poll_wait ();
1339	poll_cb ();	1679	RETVAL = poll_cb ();
1340	}	1680	OUTPUT:
		1681	RETVAL
1341		1682
1342	int	1683	int
1343	poll_fileno()	1684	poll_fileno()
1344	PROTOTYPE:	1685	PROTOTYPE:
1345	CODE:	1686	CODE:
…		…
1357		1698
1358	void	1699	void
1359	poll_wait()	1700	poll_wait()
1360	PROTOTYPE:	1701	PROTOTYPE:
1361	CODE:	1702	CODE:
1362	if (nreqs)
1363	poll_wait ();	1703	poll_wait ();
		1704
		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	}
1364		1741
1365	int	1742	int
1366	nreqs()	1743	nreqs()
1367	PROTOTYPE:	1744	PROTOTYPE:
1368	CODE:	1745	CODE:
1369	RETVAL = nreqs;	1746	RETVAL = nreqs;
1370	OUTPUT:	1747	OUTPUT:
1371	RETVAL	1748	RETVAL
1372		1749
		1750	int
		1751	nready()
		1752	PROTOTYPE:
		1753	CODE:
		1754	RETVAL = get_nready ();
		1755	OUTPUT:
		1756	RETVAL
		1757
		1758	int
		1759	npending()
		1760	PROTOTYPE:
		1761	CODE:
		1762	RETVAL = get_npending ();
		1763	OUTPUT:
		1764	RETVAL
		1765
		1766	int
		1767	nthreads()
		1768	PROTOTYPE:
		1769	CODE:
		1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1771	RETVAL = started;
		1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1773	OUTPUT:
		1774	RETVAL
		1775
1373	PROTOTYPES: DISABLE	1776	PROTOTYPES: DISABLE
1374		1777
1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1376		1779
1377	void	1780	void
…		…
1392	PPCODE:	1795	PPCODE:
1393	{	1796	{
1394	int i;	1797	int i;
1395	aio_req req;	1798	aio_req req;
1396		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
1397	if (grp->fd == 2)	1803	if (grp->int1 == 2)
1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1399		1805
1400	for (i = 1; i < items; ++i )	1806	for (i = 1; i < items; ++i )
1401	{	1807	{
1402	if (GIMME_V != G_VOID)	1808	if (GIMME_V != G_VOID)
…		…
1404		1810
1405	req = SvAIO_REQ (ST (i));	1811	req = SvAIO_REQ (ST (i));
1406		1812
1407	if (req)	1813	if (req)
1408	{	1814	{
1409	++grp->length;	1815	++grp->size;
1410	req->grp = grp;	1816	req->grp = grp;
1411		1817
1412	req->grp_prev = 0;	1818	req->grp_prev = 0;
1413	req->grp_next = grp->grp_first;	1819	req->grp_next = grp->grp_first;
1414		1820
…		…
1419	}	1825	}
1420	}	1826	}
1421	}	1827	}
1422		1828
1423	void	1829	void
		1830	cancel_subs (aio_req_ornot req)
		1831	CODE:
		1832	req_cancel_subs (req);
		1833
		1834	void
1424	result (aio_req grp, ...)	1835	result (aio_req grp, ...)
1425	CODE:	1836	CODE:
1426	{	1837	{
1427	int i;	1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
1428	AV *av = newAV ();	1843	av = newAV ();
1429		1844
1430	for (i = 1; i < items; ++i )	1845	for (i = 1; i < items; ++i )
1431	av_push (av, newSVsv (ST (i)));	1846	av_push (av, newSVsv (ST (i)));
1432		1847
1433	SvREFCNT_dec (grp->data);	1848	SvREFCNT_dec (grp->sv1);
1434	grp->data = (SV *)av;	1849	grp->sv1 = (SV *)av;
1435	}	1850	}
		1851
		1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
1436		1856
1437	void	1857	void
1438	limit (aio_req grp, int limit)	1858	limit (aio_req grp, int limit)
1439	CODE:	1859	CODE:
1440	grp->fd2 = limit;	1860	grp->int2 = limit;
1441	aio_grp_feed (grp);	1861	aio_grp_feed (grp);
1442		1862
1443	void	1863	void
1444	feed (aio_req grp, SV *callback=&PL_sv_undef)	1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
1445	CODE:	1865	CODE:
1446	{	1866	{
1447	SvREFCNT_dec (grp->fh2);	1867	SvREFCNT_dec (grp->sv2);
1448	grp->fh2 = newSVsv (callback);	1868	grp->sv2 = newSVsv (callback);
1449		1869
1450	if (grp->fd2 <= 0)	1870	if (grp->int2 <= 0)
1451	grp->fd2 = 2;	1871	grp->int2 = 2;
1452		1872
1453	aio_grp_feed (grp);	1873	aio_grp_feed (grp);
1454	}	1874	}
1455		1875

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