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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.67 by root, Tue Oct 24 03:17:39 2006 UTC vs.
Revision 1.96 by root, Sat Dec 23 04:49:37 2006 UTC

1	#if __linux	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
2	# define _GNU_SOURCE	5	# define _GNU_SOURCE
3	#endif	6	#endif
4		7
		8	/* just in case */
5	#define _REENTRANT 1	9	#define _REENTRANT 1
6		10
7	#include <errno.h>	11	#include <errno.h>
8		12
9	#include "EXTERN.h"	13	#include "EXTERN.h"
…		…
13	#include "autoconf/config.h"	17	#include "autoconf/config.h"
14		18
15	#include <pthread.h>	19	#include <pthread.h>
16		20
17	#include <stddef.h>	21	#include <stddef.h>
		22	#include <stdlib.h>
18	#include <errno.h>	23	#include <errno.h>
19	#include <sys/time.h>	24	#include <sys/time.h>
20	#include <sys/select.h>	25	#include <sys/select.h>
21	#include <sys/types.h>	26	#include <sys/types.h>
22	#include <sys/stat.h>	27	#include <sys/stat.h>
…		…
39	# else	44	# else
40	# error sendfile support requested but not available	45	# error sendfile support requested but not available
41	# endif	46	# endif
42	#endif	47	#endif
43		48
		49	/* number of seconds after which idle threads exit */
		50	#define IDLE_TIMEOUT 10
		51
44	/* used for struct dirent, AIX doesn't provide it */	52	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	53	#ifndef NAME_MAX
46	# define NAME_MAX 4096	54	# define NAME_MAX 4096
		55	#endif
		56
		57	#ifndef PTHREAD_STACK_MIN
		58	/* care for broken platforms, e.g. windows */
		59	# define PTHREAD_STACK_MIN 16384
47	#endif	60	#endif
48		61
49	#if __ia64	62	#if __ia64
50	# define STACKSIZE 65536	63	# define STACKSIZE 65536
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN	65	# define STACKSIZE PTHREAD_STACK_MIN
53	#else	66	#else
54	# define STACKSIZE 16384	67	# define STACKSIZE 16384
55	#endif	68	#endif
56		69
		70	/* wether word reads are potentially non-atomic.
		71	* this is conservatice, likely most arches this runs
		72	* on have atomic word read/writes.
		73	*/
		74	#ifndef WORDACCESS_UNSAFE
		75	# if __i386 || __x86_64
		76	# define WORDACCESS_UNSAFE 0
		77	# else
		78	# define WORDACCESS_UNSAFE 1
		79	# endif
		80	#endif
		81
57	/* buffer size for various temporary buffers */	82	/* buffer size for various temporary buffers */
58	#define AIO_BUFSIZE 65536	83	#define AIO_BUFSIZE 65536
59		84
60	#define dBUF \	85	#define dBUF \
		86	char *aio_buf; \
		87	LOCK (wrklock); \
61	char *aio_buf = malloc (AIO_BUFSIZE); \	88	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		89	UNLOCK (wrklock); \
62	if (!aio_buf) \	90	if (!aio_buf) \
63	return -1;	91	return -1;
64		92
65	#define fBUF free (aio_buf)	93	typedef SV SV8; /* byte-sv, used for argument-checking */
66		94
67	enum {	95	enum {
68	REQ_QUIT,	96	REQ_QUIT,
69	REQ_OPEN, REQ_CLOSE,	97	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,	98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,	99	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,	101	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,	103	REQ_MKNOD, REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,	104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
77	REQ_GROUP, REQ_NOP,	105	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,	106	REQ_BUSY,
79	};	107	};
80		108
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		111
84	typedef struct aio_cb	112	typedef struct aio_cb
85	{	113	{
86	struct aio_cb *volatile next;	114	struct aio_cb *volatile next;
87		115
88	SV *data, *callback;	116	SV *callback, *fh;
89	SV *fh, *fh2;	117	SV *sv1, *sv2;
90	void *dataptr, *data2ptr;	118	void *ptr1, *ptr2;
91	Stat_t *statdata;
92	off_t offset;	119	off_t offs;
93	size_t length;	120	size_t size;
94	ssize_t result;	121	ssize_t result;
95		122
96	STRLEN dataoffset;	123	STRLEN stroffset;
97	int type;	124	int type;
98	int fd, fd2;	125	int int1, int2;
99	int errorno;	126	int errorno;
100	mode_t mode; /* open */	127	mode_t mode; /* open */
101		128
102	unsigned char flags;	129	unsigned char flags;
103	unsigned char pri;	130	unsigned char pri;
…		…
105	SV *self; /* the perl counterpart of this request, if any */	132	SV *self; /* the perl counterpart of this request, if any */
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
107	} aio_cb;	134	} aio_cb;
108		135
109	enum {	136	enum {
110	FLAG_CANCELLED = 0x01,	137	FLAG_CANCELLED = 0x01, /* request was cancelled */
		138	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		139	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
111	};	140	};
112		141
113	typedef aio_cb *aio_req;	142	typedef aio_cb *aio_req;
114	typedef aio_cb *aio_req_ornot;	143	typedef aio_cb *aio_req_ornot;
115		144
…		…
120	DEFAULT_PRI = 0,	149	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,	150	PRI_BIAS = -PRI_MIN,
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,	151	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};	152	};
124		153
		154	#define AIO_TICKS ((1000000 + 1023) >> 10)
		155
		156	static unsigned int max_poll_time = 0;
		157	static unsigned int max_poll_reqs = 0;
		158
		159	/* calculcate time difference in ~1/AIO_TICKS of a second */
		160	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		161	{
		162	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		163	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		164	}
		165
		166	static pthread_t main_tid;
		167	static int main_sig;
		168	static int block_sig_level;
		169
		170	void block_sig ()
		171	{
		172	sigset_t ss;
		173
		174	if (block_sig_level++)
		175	return;
		176
		177	if (!main_sig)
		178	return;
		179
		180	sigemptyset (&ss);
		181	sigaddset (&ss, main_sig);
		182	pthread_sigmask (SIG_BLOCK, &ss, 0);
		183	}
		184
		185	void unblock_sig ()
		186	{
		187	sigset_t ss;
		188
		189	if (--block_sig_level)
		190	return;
		191
		192	if (!main_sig)
		193	return;
		194
		195	sigemptyset (&ss);
		196	sigaddset (&ss, main_sig);
		197	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		198	}
		199
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;	200	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126		201
127	static int started, wanted;	202	static unsigned int started, idle, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;
130	static int respipe [2];
131		203
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	204	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	205	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else	206	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	207	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif	208	#endif
137		209
		210	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		211	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		212
		213	/* worker threads management */
		214	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		215
		216	typedef struct worker {
		217	/* locked by wrklock */
		218	struct worker *prev, *next;
		219
		220	pthread_t tid;
		221
		222	/* locked by reslock, reqlock or wrklock */
		223	aio_req req; /* currently processed request */
		224	void *dbuf;
		225	DIR *dirp;
		226	} worker;
		227
		228	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		229
		230	static void worker_clear (worker *wrk)
		231	{
		232	if (wrk->dirp)
		233	{
		234	closedir (wrk->dirp);
		235	wrk->dirp = 0;
		236	}
		237
		238	if (wrk->dbuf)
		239	{
		240	free (wrk->dbuf);
		241	wrk->dbuf = 0;
		242	}
		243	}
		244
		245	static void worker_free (worker *wrk)
		246	{
		247	wrk->next->prev = wrk->prev;
		248	wrk->prev->next = wrk->next;
		249
		250	free (wrk);
		251	}
		252
		253	static volatile unsigned int nreqs, nready, npending;
		254	static volatile unsigned int max_idle = 4;
		255	static volatile unsigned int max_outstanding = 0xffffffff;
		256	static int respipe [2];
		257
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
		261
		262	#if WORDACCESS_UNSAFE
		263
		264	static unsigned int get_nready ()
		265	{
		266	unsigned int retval;
		267
		268	LOCK (reqlock);
		269	retval = nready;
		270	UNLOCK (reqlock);
		271
		272	return retval;
		273	}
		274
		275	static unsigned int get_npending ()
		276	{
		277	unsigned int retval;
		278
		279	LOCK (reslock);
		280	retval = npending;
		281	UNLOCK (reslock);
		282
		283	return retval;
		284	}
		285
		286	static unsigned int get_nthreads ()
		287	{
		288	unsigned int retval;
		289
		290	LOCK (wrklock);
		291	retval = started;
		292	UNLOCK (wrklock);
		293
		294	return retval;
		295	}
		296
		297	#else
		298
		299	# define get_nready() nready
		300	# define get_npending() npending
		301	# define get_nthreads() started
		302
		303	#endif
141		304
142	/*	305	/*
143	* a somewhat faster data structure might be nice, but	306	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns	307	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.	308	* per shift, the most expensive operation.
…		…
191	}	354	}
192		355
193	abort ();	356	abort ();
194	}	357	}
195		358
		359	static int poll_cb ();
196	static void req_invoke (aio_req req);	360	static int req_invoke (aio_req req);
197	static void req_free (aio_req req);	361	static void req_free (aio_req req);
		362	static void req_cancel (aio_req req);
198		363
199	/* must be called at most once */	364	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	365	static SV *req_sv (aio_req req, const char *klass)
201	{	366	{
202	if (!req->self)	367	if (!req->self)
…		…
220	return mg ? (aio_req)mg->mg_ptr : 0;	385	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	386	}
222		387
223	static void aio_grp_feed (aio_req grp)	388	static void aio_grp_feed (aio_req grp)
224	{	389	{
		390	block_sig ();
		391
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	392	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
226	{	393	{
227	int old_len = grp->length;	394	int old_len = grp->size;
228		395
229	if (grp->fh2 && SvOK (grp->fh2))	396	if (grp->sv2 && SvOK (grp->sv2))
230	{	397	{
231	dSP;	398	dSP;
232		399
233	ENTER;	400	ENTER;
234	SAVETMPS;	401	SAVETMPS;
235	PUSHMARK (SP);	402	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	403	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
237	PUTBACK;	404	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	405	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	406	SPAGAIN;
240	FREETMPS;	407	FREETMPS;
241	LEAVE;	408	LEAVE;
242	}	409	}
243		410
244	/* stop if no progress has been made */	411	/* stop if no progress has been made */
245	if (old_len == grp->length)	412	if (old_len == grp->size)
246	{	413	{
247	SvREFCNT_dec (grp->fh2);	414	SvREFCNT_dec (grp->sv2);
248	grp->fh2 = 0;	415	grp->sv2 = 0;
249	break;	416	break;
250	}	417	}
251	}	418	}
		419
		420	unblock_sig ();
252	}	421	}
253		422
254	static void aio_grp_dec (aio_req grp)	423	static void aio_grp_dec (aio_req grp)
255	{	424	{
256	--grp->length;	425	--grp->size;
257		426
258	/* call feeder, if applicable */	427	/* call feeder, if applicable */
259	aio_grp_feed (grp);	428	aio_grp_feed (grp);
260		429
261	/* finish, if done */	430	/* finish, if done */
262	if (!grp->length && grp->fd)	431	if (!grp->size && grp->int1)
263	{	432	{
		433	block_sig ();
		434
264	req_invoke (grp);	435	if (!req_invoke (grp))
		436	{
		437	req_free (grp);
		438	unblock_sig ();
		439	croak (0);
		440	}
		441
265	req_free (grp);	442	req_free (grp);
		443	unblock_sig ();
266	}	444	}
267	}	445	}
268		446
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)	447	static int req_invoke (aio_req req)
295	{	448	{
296	dSP;	449	dSP;
		450
		451	if (req->flags & FLAG_SV1_RO_OFF)
		452	SvREADONLY_off (req->sv1);
297		453
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	454	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299	{	455	{
300	errno = req->errorno;
301
302	ENTER;	456	ENTER;
303	SAVETMPS;	457	SAVETMPS;
304	PUSHMARK (SP);	458	PUSHMARK (SP);
305	EXTEND (SP, 1);	459	EXTEND (SP, 1);
306		460
…		…
310	{	464	{
311	SV *rv = &PL_sv_undef;	465	SV *rv = &PL_sv_undef;
312		466
313	if (req->result >= 0)	467	if (req->result >= 0)
314	{	468	{
		469	int i;
315	char *buf = req->data2ptr;	470	char *buf = req->ptr2;
316	AV *av = newAV ();	471	AV *av = newAV ();
317		472
318	while (req->result)	473	av_extend (av, req->result - 1);
		474
		475	for (i = 0; i < req->result; ++i)
319	{	476	{
320	SV *sv = newSVpv (buf, 0);	477	SV *sv = newSVpv (buf, 0);
321		478
322	av_push (av, sv);	479	av_store (av, i, sv);
323	buf += SvCUR (sv) + 1;	480	buf += SvCUR (sv) + 1;
324	req->result--;
325	}	481	}
326		482
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	483	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	484	}
329		485
…		…
339	PUSHs (sv_2mortal (newSViv (req->result)));	495	PUSHs (sv_2mortal (newSViv (req->result)));
340	PUTBACK;	496	PUTBACK;
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	497	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
342	SPAGAIN;	498	SPAGAIN;
343		499
344	fh = SvREFCNT_inc (POPs);	500	fh = POPs;
345
346	PUSHMARK (SP);	501	PUSHMARK (SP);
347	XPUSHs (sv_2mortal (fh));	502	XPUSHs (fh);
348	}	503	}
349	break;	504	break;
350		505
351	case REQ_GROUP:	506	case REQ_GROUP:
352	req->fd = 2; /* mark group as finished */	507	req->int1 = 2; /* mark group as finished */
353		508
354	if (req->data)	509	if (req->sv1)
355	{	510	{
356	int i;	511	int i;
357	AV *av = (AV *)req->data;	512	AV *av = (AV *)req->sv1;
358		513
359	EXTEND (SP, AvFILL (av) + 1);	514	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	515	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	516	PUSHs (*av_fetch (av, i, 0));
362	}	517	}
363	break;	518	break;
364		519
365	case REQ_NOP:	520	case REQ_NOP:
366	case REQ_SLEEP:	521	case REQ_BUSY:
		522	break;
		523
		524	case REQ_READLINK:
		525	if (req->result > 0)
		526	{
		527	SvCUR_set (req->sv1, req->result);
		528	*SvEND (req->sv1) = 0;
		529	PUSHs (req->sv1);
		530	}
		531	break;
		532
		533	case REQ_STAT:
		534	case REQ_LSTAT:
		535	case REQ_FSTAT:
		536	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		537	PL_laststatval = req->result;
		538	PL_statcache = *(Stat_t *)(req->ptr2);
		539	PUSHs (sv_2mortal (newSViv (req->result)));
		540	break;
		541
		542	case REQ_READ:
		543	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		544	*SvEND (req->sv1) = 0;
		545	PUSHs (sv_2mortal (newSViv (req->result)));
367	break;	546	break;
368		547
369	default:	548	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	549	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	550	break;
372	}	551	}
373		552
		553	errno = req->errorno;
374		554
375	PUTBACK;	555	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	556	call_sv (req->callback, G_VOID | G_EVAL);
377	SPAGAIN;	557	SPAGAIN;
378		558
…		…
392	grp->grp_first = req->grp_next;	572	grp->grp_first = req->grp_next;
393		573
394	aio_grp_dec (grp);	574	aio_grp_dec (grp);
395	}	575	}
396		576
397	if (SvTRUE (ERRSV))	577	return !SvTRUE (ERRSV);
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	578	}
403		579
404	static void req_free (aio_req req)	580	static void req_free (aio_req req)
405	{	581	{
406	if (req->self)	582	if (req->self)
407	{	583	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	584	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	585	SvREFCNT_dec (req->self);
410	}	586	}
411		587
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	588	SvREFCNT_dec (req->fh);
		589	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	590	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	591	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417		592
418	if (req->type == REQ_READDIR && req->result >= 0)	593	if (req->flags & FLAG_PTR2_FREE)
419	free (req->data2ptr);	594	free (req->ptr2);
420		595
421	Safefree (req);	596	Safefree (req);
422	}	597	}
423		598
		599	static void req_cancel_subs (aio_req grp)
		600	{
		601	aio_req sub;
		602
		603	if (grp->type != REQ_GROUP)
		604	return;
		605
		606	SvREFCNT_dec (grp->sv2);
		607	grp->sv2 = 0;
		608
		609	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		610	req_cancel (sub);
		611	}
		612
424	static void req_cancel (aio_req req)	613	static void req_cancel (aio_req req)
425	{	614	{
426	req->flags |= FLAG_CANCELLED;	615	req->flags |= FLAG_CANCELLED;
427		616
428	if (req->type == REQ_GROUP)	617	req_cancel_subs (req);
429	{
430	aio_req sub;
431
432	for (sub = req->grp_first; sub; sub = sub->grp_next)
433	req_cancel (sub);
434	}
435	}
436
437	static int poll_cb ()
438	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)
445	{
446	pthread_mutex_lock (&reslock);
447	req = reqq_shift (&res_queue);
448
449	if (req)
450	{
451	if (!res_queue.size)
452	{
453	/* read any signals sent by the worker threads */
454	char buf [32];
455	while (read (respipe [0], buf, 32) == 32)
456	;
457	}
458	}
459
460	pthread_mutex_unlock (&reslock);
461
462	if (!req)
463	break;
464
465	--nreqs;
466
467	if (req->type == REQ_QUIT)
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	}
496
497	return count;
498	}	618	}
499		619
500	static void *aio_proc(void *arg);	620	static void *aio_proc(void *arg);
501		621
502	static void start_thread (void)	622	static void start_thread (void)
503	{	623	{
504	sigset_t fullsigset, oldsigset;	624	sigset_t fullsigset, oldsigset;
505	pthread_t tid;
506	pthread_attr_t attr;	625	pthread_attr_t attr;
		626
		627	worker *wrk = calloc (1, sizeof (worker));
		628
		629	if (!wrk)
		630	croak ("unable to allocate worker thread data");
507		631
508	pthread_attr_init (&attr);	632	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);	633	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	634	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		635	#ifdef PTHREAD_SCOPE_PROCESS
		636	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		637	#endif
511		638
512	sigfillset (&fullsigset);	639	sigfillset (&fullsigset);
		640
		641	LOCK (wrklock);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	642	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
514		643
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	644	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		645	{
		646	wrk->prev = &wrk_first;
		647	wrk->next = wrk_first.next;
		648	wrk_first.next->prev = wrk;
		649	wrk_first.next = wrk;
516	started++;	650	++started;
		651	}
		652	else
		653	free (wrk);
517		654
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);	655	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
		656	UNLOCK (wrklock);
		657	}
		658
		659	static void maybe_start_thread ()
		660	{
		661	if (get_nthreads () >= wanted)
		662	return;
		663
		664	/* todo: maybe use idle here, but might be less exact */
		665	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		666	return;
		667
		668	start_thread ();
519	}	669	}
520		670
521	static void req_send (aio_req req)	671	static void req_send (aio_req req)
522	{	672	{
523	while (started < wanted && nreqs >= started)	673	block_sig ();
524	start_thread ();
525		674
526	++nreqs;	675	++nreqs;
527		676
528	pthread_mutex_lock (&reqlock);	677	LOCK (reqlock);
		678	++nready;
529	reqq_push (&req_queue, req);	679	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);	680	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);	681	UNLOCK (reqlock);
532		682
533	if (nreqs > max_outstanding)	683	unblock_sig ();
534	for (;;)
535	{
536	poll_cb ();
537		684
538	if (nreqs <= max_outstanding)	685	maybe_start_thread ();
539	break;
540
541	poll_wait ();
542	}
543	}	686	}
544		687
545	static void end_thread (void)	688	static void end_thread (void)
546	{	689	{
547	aio_req req;	690	aio_req req;
…		…
549	Newz (0, req, 1, aio_cb);	692	Newz (0, req, 1, aio_cb);
550		693
551	req->type = REQ_QUIT;	694	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;	695	req->pri = PRI_MAX + PRI_BIAS;
553		696
554	req_send (req);	697	LOCK (reqlock);
		698	reqq_push (&req_queue, req);
		699	pthread_cond_signal (&reqwait);
		700	UNLOCK (reqlock);
		701
		702	LOCK (wrklock);
		703	--started;
		704	UNLOCK (wrklock);
		705	}
		706
		707	static void set_max_idle (int nthreads)
		708	{
		709	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		710	max_idle = nthreads <= 0 ? 1 : nthreads;
		711	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
555	}	712	}
556		713
557	static void min_parallel (int nthreads)	714	static void min_parallel (int nthreads)
558	{	715	{
559	if (wanted < nthreads)	716	if (wanted < nthreads)
560	wanted = nthreads;	717	wanted = nthreads;
561	}	718	}
562		719
563	static void max_parallel (int nthreads)	720	static void max_parallel (int nthreads)
564	{	721	{
565	int cur = started;
566
567	if (wanted > nthreads)	722	if (wanted > nthreads)
568	wanted = nthreads;	723	wanted = nthreads;
569		724
570	while (cur > wanted)	725	while (started > wanted)
		726	end_thread ();
		727	}
		728
		729	static void poll_wait ()
		730	{
		731	fd_set rfd;
		732
		733	while (nreqs)
571	{	734	{
		735	int size;
		736	if (WORDACCESS_UNSAFE) LOCK (reslock);
		737	size = res_queue.size;
		738	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		739
		740	if (size)
		741	return;
		742
572	end_thread ();	743	maybe_start_thread ();
573	cur--;	744
		745	FD_ZERO(&rfd);
		746	FD_SET(respipe [0], &rfd);
		747
		748	select (respipe [0] + 1, &rfd, 0, 0, 0);
574	}	749	}
		750	}
575		751
576	while (started > wanted)	752	static int poll_cb ()
		753	{
		754	dSP;
		755	int count = 0;
		756	int maxreqs = max_poll_reqs;
		757	int do_croak = 0;
		758	struct timeval tv_start, tv_now;
		759	aio_req req;
		760
		761	if (max_poll_time)
		762	gettimeofday (&tv_start, 0);
		763
		764	block_sig ();
		765
		766	for (;;)
577	{	767	{
		768	for (;;)
		769	{
		770	maybe_start_thread ();
		771
		772	LOCK (reslock);
		773	req = reqq_shift (&res_queue);
		774
		775	if (req)
		776	{
		777	--npending;
		778
		779	if (!res_queue.size)
		780	{
		781	/* read any signals sent by the worker threads */
		782	char buf [4];
		783	while (read (respipe [0], buf, 4) == 4)
		784	;
		785	}
		786	}
		787
		788	UNLOCK (reslock);
		789
		790	if (!req)
		791	break;
		792
		793	--nreqs;
		794
		795	if (req->type == REQ_GROUP && req->size)
		796	{
		797	req->int1 = 1; /* mark request as delayed */
		798	continue;
		799	}
		800	else
		801	{
		802	if (!req_invoke (req))
		803	{
		804	req_free (req);
		805	unblock_sig ();
		806	croak (0);
		807	}
		808
		809	count++;
		810	}
		811
		812	req_free (req);
		813
		814	if (maxreqs && !--maxreqs)
		815	break;
		816
		817	if (max_poll_time)
		818	{
		819	gettimeofday (&tv_now, 0);
		820
		821	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		822	break;
		823	}
		824	}
		825
		826	if (nreqs <= max_outstanding)
		827	break;
		828
578	poll_wait ();	829	poll_wait ();
579	poll_cb ();	830
		831	++maxreqs;
580	}	832	}
		833
		834	unblock_sig ();
		835	return count;
581	}	836	}
582		837
583	static void create_pipe ()	838	static void create_pipe ()
584	{	839	{
585	if (pipe (respipe))	840	if (pipe (respipe))
…		…
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{	865	{
611	ssize_t res;	866	ssize_t res;
612	off_t ooffset;	867	off_t ooffset;
613		868
614	pthread_mutex_lock (&preadwritelock);	869	LOCK (preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);	870	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);	871	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);	872	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);	873	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);	874	UNLOCK (preadwritelock);
620		875
621	return res;	876	return res;
622	}	877	}
623		878
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	879	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{	880	{
626	ssize_t res;	881	ssize_t res;
627	off_t ooffset;	882	off_t ooffset;
628		883
629	pthread_mutex_lock (&preadwritelock);	884	LOCK (preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);	885	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);	886	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);	887	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);	889	UNLOCK (preadwritelock);
635		890
636	return res;	891	return res;
637	}	892	}
638	#endif	893	#endif
639		894
640	#if !HAVE_FDATASYNC	895	#if !HAVE_FDATASYNC
641	# define fdatasync fsync	896	# define fdatasync fsync
642	#endif	897	#endif
643		898
644	#if !HAVE_READAHEAD	899	#if !HAVE_READAHEAD
645	# define readahead aio_readahead	900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
646		901
647	static ssize_t readahead (int fd, off_t offset, size_t count)	902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
648	{	903	{
649	dBUF;	904	dBUF;
650		905
651	while (count > 0)	906	while (count > 0)
652	{	907	{
…		…
655	pread (fd, aio_buf, len, offset);	910	pread (fd, aio_buf, len, offset);
656	offset += len;	911	offset += len;
657	count -= len;	912	count -= len;
658	}	913	}
659		914
660	fBUF;
661
662	errno = 0;	915	errno = 0;
663	}	916	}
		917
664	#endif	918	#endif
665		919
666	#if !HAVE_READDIR_R	920	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r	921	# define readdir_r aio_readdir_r
668		922
…		…
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672	{	926	{
673	struct dirent *e;	927	struct dirent *e;
674	int errorno;	928	int errorno;
675		929
676	pthread_mutex_lock (&readdirlock);	930	LOCK (readdirlock);
677		931
678	e = readdir (dirp);	932	e = readdir (dirp);
679	errorno = errno;	933	errorno = errno;
680		934
681	if (e)	935	if (e)
…		…
684	strcpy (ent->d_name, e->d_name);	938	strcpy (ent->d_name, e->d_name);
685	}	939	}
686	else	940	else
687	*res = 0;	941	*res = 0;
688		942
689	pthread_mutex_unlock (&readdirlock);	943	UNLOCK (readdirlock);
690		944
691	errno = errorno;	945	errno = errorno;
692	return e ? 0 : -1;	946	return e ? 0 : -1;
693	}	947	}
694	#endif	948	#endif
695		949
696	/* sendfile always needs emulation */	950	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	951	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
698	{	952	{
699	ssize_t res;	953	ssize_t res;
700		954
701	if (!count)	955	if (!count)
702	return 0;	956	return 0;
…		…
713	{	967	{
714	off_t sbytes;	968	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716		970
717	if (res < 0 && sbytes)	971	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
719	res = sbytes;	973	res = sbytes;
720	}	974	}
721		975
722	# elif __hpux	976	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);	977	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
779		1033
780	offset += cnt;	1034	offset += cnt;
781	res += cnt;	1035	res += cnt;
782	count -= cnt;	1036	count -= cnt;
783	}	1037	}
784
785	fBUF;
786	}	1038	}
787		1039
788	return res;	1040	return res;
789	}	1041	}
790		1042
791	/* read a full directory */	1043	/* read a full directory */
792	static int scandir_ (const char *path, void **namesp)	1044	static void scandir_ (aio_req req, worker *self)
793	{	1045	{
794	DIR *dirp;	1046	DIR *dirp;
795	union	1047	union
796	{	1048	{
797	struct dirent d;	1049	struct dirent d;
…		…
802	int memlen = 4096;	1054	int memlen = 4096;
803	int memofs = 0;	1055	int memofs = 0;
804	int res = 0;	1056	int res = 0;
805	int errorno;	1057	int errorno;
806		1058
807	dirp = opendir (path);	1059	LOCK (wrklock);
808	if (!dirp)	1060	self->dirp = dirp = opendir (req->ptr1);
809	return -1;
810
811	u = malloc (sizeof (*u));	1061	self->dbuf = u = malloc (sizeof (*u));
		1062	req->flags |= FLAG_PTR2_FREE;
812	names = malloc (memlen);	1063	req->ptr2 = names = malloc (memlen);
		1064	UNLOCK (wrklock);
813		1065
814	if (u && names)	1066	if (dirp && u && names)
815	for (;;)	1067	for (;;)
816	{	1068	{
817	errno = 0;	1069	errno = 0;
818	readdir_r (dirp, &u->d, &entp);	1070	readdir_r (dirp, &u->d, &entp);
819		1071
…		…
829	res++;	1081	res++;
830		1082
831	while (memofs + len > memlen)	1083	while (memofs + len > memlen)
832	{	1084	{
833	memlen *= 2;	1085	memlen *= 2;
		1086	LOCK (wrklock);
834	names = realloc (names, memlen);	1087	req->ptr2 = names = realloc (names, memlen);
		1088	UNLOCK (wrklock);
		1089
835	if (!names)	1090	if (!names)
836	break;	1091	break;
837	}	1092	}
838		1093
839	memcpy (names + memofs, name, len);	1094	memcpy (names + memofs, name, len);
840	memofs += len;	1095	memofs += len;
841	}	1096	}
842	}	1097	}
843		1098
844	errorno = errno;
845	free (u);
846	closedir (dirp);
847
848	if (errorno)	1099	if (errno)
		1100	res = -1;
		1101
		1102	req->result = res;
		1103	}
		1104
		1105	/*****************************************************************************/
		1106
		1107	static void *aio_proc (void *thr_arg)
		1108	{
		1109	aio_req req;
		1110	struct timespec ts;
		1111	worker *self = (worker *)thr_arg;
		1112
		1113	/* try to distribute timeouts somewhat evenly */
		1114	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1115	* (1000000000UL / 1024UL);
		1116
		1117	for (;;)
849	{	1118	{
850	free (names);	1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
851	errno = errorno;
852	res = -1;
853	}
854		1120
855	*namesp = (void *)names;	1121	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		1122
870	for (;;)	1123	for (;;)
871	{	1124	{
872	req = reqq_shift (&req_queue);	1125	self->req = req = reqq_shift (&req_queue);
873		1126
874	if (req)	1127	if (req)
875	break;	1128	break;
876		1129
		1130	++idle;
		1131
		1132	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1133	== ETIMEDOUT)
		1134	{
		1135	if (idle > max_idle)
		1136	{
		1137	--idle;
		1138	UNLOCK (reqlock);
		1139	LOCK (wrklock);
		1140	--started;
		1141	UNLOCK (wrklock);
		1142	goto quit;
		1143	}
		1144
		1145	/* we are allowed to idle, so do so without any timeout */
877	pthread_cond_wait (&reqwait, &reqlock);	1146	pthread_cond_wait (&reqwait, &reqlock);
		1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1148	}
		1149
		1150	--idle;
878	}	1151	}
879		1152
880	pthread_mutex_unlock (&reqlock);	1153	--nready;
		1154
		1155	UNLOCK (reqlock);
881		1156
882	errno = 0; /* strictly unnecessary */	1157	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884		1158
885	if (!(req->flags & FLAG_CANCELLED))	1159	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)	1160	switch (req->type)
887	{	1161	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1162	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;	1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
890		1164
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1165	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;	1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
893		1167
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1168	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;	1169	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;	1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
897		1171
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;	1173	case REQ_CLOSE: req->result = close (req->int1); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1176	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1177	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1178	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1179	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1180	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
905		1181
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1182	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;	1183	case REQ_FSYNC: req->result = fsync (req->int1); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1184	case REQ_READDIR: scandir_ (req, self); break;
909		1185
910	case REQ_SLEEP:	1186	case REQ_BUSY:
911	{	1187	{
912	struct timeval tv;	1188	struct timeval tv;
913		1189
914	tv.tv_sec = req->fd;	1190	tv.tv_sec = req->int1;
915	tv.tv_usec = req->fd2;	1191	tv.tv_usec = req->int2;
916		1192
917	req->result = select (0, 0, 0, 0, &tv);	1193	req->result = select (0, 0, 0, 0, &tv);
918	}	1194	}
919		1195
920	case REQ_GROUP:	1196	case REQ_GROUP:
921	case REQ_NOP:	1197	case REQ_NOP:
		1198	break;
		1199
922	case REQ_QUIT:	1200	case REQ_QUIT:
923	break;	1201	goto quit;
924		1202
925	default:	1203	default:
926	req->result = ENOSYS;	1204	req->result = ENOSYS;
927	break;	1205	break;
928	}	1206	}
929		1207
930	req->errorno = errno;	1208	req->errorno = errno;
931		1209
932	pthread_mutex_lock (&reslock);	1210	LOCK (reslock);
		1211
		1212	++npending;
933		1213
934	if (!reqq_push (&res_queue, req))	1214	if (!reqq_push (&res_queue, req))
		1215	{
935	/* write a dummy byte to the pipe so fh becomes ready */	1216	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);	1217	write (respipe [1], &respipe, 1);
937		1218
938	pthread_mutex_unlock (&reslock);	1219	/* optionally signal the main thread asynchronously */
		1220	if (main_sig)
		1221	pthread_kill (main_tid, main_sig);
		1222	}
		1223
		1224	self->req = 0;
		1225	worker_clear (self);
		1226
		1227	UNLOCK (reslock);
939	}	1228	}
940	while (type != REQ_QUIT);	1229
		1230	quit:
		1231	LOCK (wrklock);
		1232	worker_free (self);
		1233	UNLOCK (wrklock);
941		1234
942	return 0;	1235	return 0;
943	}	1236	}
944		1237
945	/*****************************************************************************/	1238	/*****************************************************************************/
946		1239
947	static void atfork_prepare (void)	1240	static void atfork_prepare (void)
948	{	1241	{
949	pthread_mutex_lock (&reqlock);	1242	LOCK (wrklock);
950	pthread_mutex_lock (&reslock);	1243	LOCK (reqlock);
		1244	LOCK (reslock);
951	#if !HAVE_PREADWRITE	1245	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);	1246	LOCK (preadwritelock);
953	#endif	1247	#endif
954	#if !HAVE_READDIR_R	1248	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);	1249	LOCK (readdirlock);
956	#endif	1250	#endif
957	}	1251	}
958		1252
959	static void atfork_parent (void)	1253	static void atfork_parent (void)
960	{	1254	{
961	#if !HAVE_READDIR_R	1255	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);	1256	UNLOCK (readdirlock);
963	#endif	1257	#endif
964	#if !HAVE_PREADWRITE	1258	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);	1259	UNLOCK (preadwritelock);
966	#endif	1260	#endif
967	pthread_mutex_unlock (&reslock);	1261	UNLOCK (reslock);
968	pthread_mutex_unlock (&reqlock);	1262	UNLOCK (reqlock);
		1263	UNLOCK (wrklock);
969	}	1264	}
970		1265
971	static void atfork_child (void)	1266	static void atfork_child (void)
972	{	1267	{
973	aio_req prv;	1268	aio_req prv;
974
975	started = 0;
976		1269
977	while (prv = reqq_shift (&req_queue))	1270	while (prv = reqq_shift (&req_queue))
978	req_free (prv);	1271	req_free (prv);
979		1272
980	while (prv = reqq_shift (&res_queue))	1273	while (prv = reqq_shift (&res_queue))
981	req_free (prv);	1274	req_free (prv);
982		1275
		1276	while (wrk_first.next != &wrk_first)
		1277	{
		1278	worker *wrk = wrk_first.next;
		1279
		1280	if (wrk->req)
		1281	req_free (wrk->req);
		1282
		1283	worker_clear (wrk);
		1284	worker_free (wrk);
		1285	}
		1286
		1287	started = 0;
		1288	idle = 0;
		1289	nreqs = 0;
		1290	nready = 0;
		1291	npending = 0;
		1292
983	close (respipe [0]);	1293	close (respipe [0]);
984	close (respipe [1]);	1294	close (respipe [1]);
985	create_pipe ();	1295	create_pipe ();
986		1296
987	atfork_parent ();	1297	atfork_parent ();
…		…
1013	PROTOTYPES: ENABLE	1323	PROTOTYPES: ENABLE
1014		1324
1015	BOOT:	1325	BOOT:
1016	{	1326	{
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	1327	HV *stash = gv_stashpv ("IO::AIO", 1);
		1328
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1329	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1330	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1331	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1332	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1333	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1334	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1335	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1021		1336
1022	create_pipe ();	1337	create_pipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}	1339	}
1025		1340
1026	void	1341	void
1027	min_parallel (nthreads)	1342	max_poll_reqs (int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	1343	PROTOTYPE: $
		1344	CODE:
		1345	max_poll_reqs = nreqs;
1030		1346
1031	void	1347	void
1032	max_parallel (nthreads)	1348	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	1349	PROTOTYPE: $
		1350	CODE:
		1351	max_poll_time = nseconds * AIO_TICKS;
		1352
		1353	void
		1354	min_parallel (int nthreads)
		1355	PROTOTYPE: $
		1356
		1357	void
		1358	max_parallel (int nthreads)
		1359	PROTOTYPE: $
		1360
		1361	void
		1362	max_idle (int nthreads)
		1363	PROTOTYPE: $
		1364	CODE:
		1365	set_max_idle (nthreads);
1035		1366
1036	int	1367	int
1037	max_outstanding (nreqs)	1368	max_outstanding (int maxreqs)
1038	int nreqs	1369	PROTOTYPE: $
1039	PROTOTYPE: $
1040	CODE:	1370	CODE:
1041	RETVAL = max_outstanding;	1371	RETVAL = max_outstanding;
1042	max_outstanding = nreqs;	1372	max_outstanding = maxreqs;
		1373	OUTPUT:
		1374	RETVAL
1043		1375
1044	void	1376	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1046	SV * pathname	1378	SV8 * pathname
1047	int flags	1379	int flags
1048	int mode	1380	int mode
1049	SV * callback	1381	SV * callback
1050	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
1051	PPCODE:	1383	PPCODE:
1052	{	1384	{
1053	dREQ;	1385	dREQ;
1054		1386
1055	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
1056	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	1390	req->int1 = flags;
1059	req->mode = mode;	1391	req->mode = mode;
1060		1392
1061	REQ_SEND;	1393	REQ_SEND;
1062	}	1394	}
1063		1395
…		…
1073	PPCODE:	1405	PPCODE:
1074	{	1406	{
1075	dREQ;	1407	dREQ;
1076		1408
1077	req->type = ix;	1409	req->type = ix;
1078	req->fh = newSVsv (fh);	1410	req->fh = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1080		1412
1081	REQ_SEND (req);	1413	REQ_SEND (req);
1082	}	1414	}
1083		1415
1084	void	1416	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1086	SV * fh	1418	SV * fh
1087	UV offset	1419	UV offset
1088	UV length	1420	UV length
1089	SV * data	1421	SV8 * data
1090	UV dataoffset	1422	UV dataoffset
1091	SV * callback	1423	SV * callback
1092	ALIAS:	1424	ALIAS:
1093	aio_read = REQ_READ	1425	aio_read = REQ_READ
1094	aio_write = REQ_WRITE	1426	aio_write = REQ_WRITE
1095	PROTOTYPE: $$$$$;$	1427	PROTOTYPE: $$$$$;$
1096	PPCODE:	1428	PPCODE:
1097	{	1429	{
1098	aio_req req;
1099	STRLEN svlen;	1430	STRLEN svlen;
1100	char *svptr = SvPVbyte (data, svlen);	1431	char *svptr = SvPVbyte (data, svlen);
1101		1432
1102	SvUPGRADE (data, SVt_PV);	1433	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);	1434	SvPOK_on (data);
…		…
1115	length = svlen - dataoffset;	1446	length = svlen - dataoffset;
1116	}	1447	}
1117	else	1448	else
1118	{	1449	{
1119	/* read: grow scalar as necessary */	1450	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, length + dataoffset);	1451	svptr = SvGROW (data, length + dataoffset + 1);
1121	}	1452	}
1122		1453
1123	if (length < 0)	1454	if (length < 0)
1124	croak ("length must not be negative");	1455	croak ("length must not be negative");
1125		1456
1126	{	1457	{
1127	dREQ;	1458	dREQ;
1128		1459
1129	req->type = ix;	1460	req->type = ix;
1130	req->fh = newSVsv (fh);	1461	req->fh = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));	1463	: IoOFP (sv_2io (fh)));
1133	req->offset = offset;	1464	req->offs = offset;
1134	req->length = length;	1465	req->size = length;
1135	req->data = SvREFCNT_inc (data);	1466	req->sv1 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	1467	req->ptr1 = (char *)svptr + dataoffset;
		1468	req->stroffset = dataoffset;
1137		1469
1138	if (!SvREADONLY (data))	1470	if (!SvREADONLY (data))
1139	{	1471	{
1140	SvREADONLY_on (data);	1472	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	1473	req->flags |= FLAG_SV1_RO_OFF;
1142	}	1474	}
1143		1475
1144	REQ_SEND;	1476	REQ_SEND;
1145	}	1477	}
		1478	}
		1479
		1480	void
		1481	aio_readlink (path,callback=&PL_sv_undef)
		1482	SV8 * path
		1483	SV * callback
		1484	PROTOTYPE: $$;$
		1485	PPCODE:
		1486	{
		1487	SV *data;
		1488	dREQ;
		1489
		1490	data = newSV (NAME_MAX);
		1491	SvPOK_on (data);
		1492
		1493	req->type = REQ_READLINK;
		1494	req->fh = newSVsv (path);
		1495	req->ptr2 = SvPVbyte_nolen (req->fh);
		1496	req->sv1 = data;
		1497	req->ptr1 = SvPVbyte_nolen (data);
		1498
		1499	REQ_SEND;
1146	}	1500	}
1147		1501
1148	void	1502	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1503	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1150	SV * out_fh	1504	SV * out_fh
…		…
1156	PPCODE:	1510	PPCODE:
1157	{	1511	{
1158	dREQ;	1512	dREQ;
1159		1513
1160	req->type = REQ_SENDFILE;	1514	req->type = REQ_SENDFILE;
1161	req->fh = newSVsv (out_fh);	1515	req->fh = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1163	req->fh2 = newSVsv (in_fh);	1517	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1165	req->offset = in_offset;	1519	req->offs = in_offset;
1166	req->length = length;	1520	req->size = length;
1167		1521
1168	REQ_SEND;	1522	REQ_SEND;
1169	}	1523	}
1170		1524
1171	void	1525	void
…		…
1178	PPCODE:	1532	PPCODE:
1179	{	1533	{
1180	dREQ;	1534	dREQ;
1181		1535
1182	req->type = REQ_READAHEAD;	1536	req->type = REQ_READAHEAD;
1183	req->fh = newSVsv (fh);	1537	req->fh = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1185	req->offset = offset;	1539	req->offs = offset;
1186	req->length = length;	1540	req->size = length;
1187		1541
1188	REQ_SEND;	1542	REQ_SEND;
1189	}	1543	}
1190		1544
1191	void	1545	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	1546	aio_stat (fh_or_path,callback=&PL_sv_undef)
1193	SV * fh_or_path	1547	SV8 * fh_or_path
1194	SV * callback	1548	SV * callback
1195	ALIAS:	1549	ALIAS:
1196	aio_stat = REQ_STAT	1550	aio_stat = REQ_STAT
1197	aio_lstat = REQ_LSTAT	1551	aio_lstat = REQ_LSTAT
1198	PPCODE:	1552	PPCODE:
1199	{	1553	{
1200	dREQ;	1554	dREQ;
1201		1555
1202	New (0, req->statdata, 1, Stat_t);	1556	req->ptr2 = malloc (sizeof (Stat_t));
1203	if (!req->statdata)	1557	if (!req->ptr2)
1204	{	1558	{
1205	req_free (req);	1559	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");	1560	croak ("out of memory during aio_stat statdata allocation");
1207	}	1561	}
		1562
		1563	req->flags |= FLAG_PTR2_FREE;
1208		1564
1209	if (SvPOK (fh_or_path))	1565	if (SvPOK (fh_or_path))
1210	{	1566	{
1211	req->type = ix;	1567	req->type = ix;
1212	req->data = newSVsv (fh_or_path);	1568	req->sv1 = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	1569	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	1570	}
1215	else	1571	else
1216	{	1572	{
1217	req->type = REQ_FSTAT;	1573	req->type = REQ_FSTAT;
1218	req->fh = newSVsv (fh_or_path);	1574	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	1576	}
1221		1577
1222	REQ_SEND;	1578	REQ_SEND;
1223	}	1579	}
1224		1580
1225	void	1581	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	1582	aio_unlink (pathname,callback=&PL_sv_undef)
1227	SV * pathname	1583	SV8 * pathname
1228	SV * callback	1584	SV * callback
1229	ALIAS:	1585	ALIAS:
1230	aio_unlink = REQ_UNLINK	1586	aio_unlink = REQ_UNLINK
1231	aio_rmdir = REQ_RMDIR	1587	aio_rmdir = REQ_RMDIR
1232	aio_readdir = REQ_READDIR	1588	aio_readdir = REQ_READDIR
1233	PPCODE:	1589	PPCODE:
1234	{	1590	{
1235	dREQ;	1591	dREQ;
1236		1592
1237	req->type = ix;	1593	req->type = ix;
1238	req->data = newSVsv (pathname);	1594	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1240		1596
1241	REQ_SEND;	1597	REQ_SEND;
1242	}	1598	}
1243		1599
1244	void	1600	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1246	SV * oldpath	1602	SV8 * oldpath
1247	SV * newpath	1603	SV8 * newpath
1248	SV * callback	1604	SV * callback
1249	ALIAS:	1605	ALIAS:
1250	aio_link = REQ_LINK	1606	aio_link = REQ_LINK
1251	aio_symlink = REQ_SYMLINK	1607	aio_symlink = REQ_SYMLINK
1252	aio_rename = REQ_RENAME	1608	aio_rename = REQ_RENAME
1253	PPCODE:	1609	PPCODE:
1254	{	1610	{
1255	dREQ;	1611	dREQ;
1256		1612
1257	req->type = ix;	1613	req->type = ix;
1258	req->fh = newSVsv (oldpath);	1614	req->fh = newSVsv (oldpath);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	1615	req->ptr2 = SvPVbyte_nolen (req->fh);
1260	req->data = newSVsv (newpath);	1616	req->sv1 = newSVsv (newpath);
1261	req->dataptr = SvPVbyte_nolen (req->data);	1617	req->ptr1 = SvPVbyte_nolen (req->sv1);
1262		1618
1263	REQ_SEND;	1619	REQ_SEND;
1264	}	1620	}
1265		1621
1266	void	1622	void
1267	aio_sleep (delay,callback=&PL_sv_undef)	1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1268	double delay	1624	SV8 * pathname
1269	SV * callback	1625	SV * callback
		1626	UV mode
		1627	UV dev
1270	PPCODE:	1628	PPCODE:
1271	{	1629	{
1272	dREQ;	1630	dREQ;
		1631
		1632	req->type = REQ_MKNOD;
		1633	req->sv1 = newSVsv (pathname);
		1634	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1635	req->mode = (mode_t)mode;
		1636	req->offs = dev;
		1637
		1638	REQ_SEND;
		1639	}
1273		1640
		1641	void
		1642	aio_busy (delay,callback=&PL_sv_undef)
		1643	double delay
		1644	SV * callback
		1645	PPCODE:
		1646	{
		1647	dREQ;
		1648
1274	req->type = REQ_SLEEP;	1649	req->type = REQ_BUSY;
1275	req->fd = delay < 0. ? 0 : delay;	1650	req->int1 = delay < 0. ? 0 : delay;
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1651	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1277		1652
1278	REQ_SEND;	1653	REQ_SEND;
1279	}	1654	}
1280		1655
1281	void	1656	void
…		…
1285	PPCODE:	1660	PPCODE:
1286	{	1661	{
1287	dREQ;	1662	dREQ;
1288		1663
1289	req->type = REQ_GROUP;	1664	req->type = REQ_GROUP;
		1665
1290	req_send (req);	1666	req_send (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1667	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1293	}	1668	}
1294		1669
1295	void	1670	void
1296	aio_nop (callback=&PL_sv_undef)	1671	aio_nop (callback=&PL_sv_undef)
1297	SV * callback	1672	SV * callback
1298	PPCODE:	1673	PPCODE:
1299	{	1674	{
1300	dREQ;	1675	dREQ;
1301		1676
1302	req->type = REQ_NOP;	1677	req->type = REQ_NOP;
1303		1678
1304	REQ_SEND;	1679	REQ_SEND;
1305	}	1680	}
1306		1681
1307	void	1682	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1683	aioreq_pri (int pri = 0)
		1684	PROTOTYPE: ;$
1309	CODE:	1685	CODE:
		1686	RETVAL = next_pri - PRI_BIAS;
		1687	if (items > 0)
		1688	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1689	if (pri < PRI_MIN) pri = PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1690	if (pri > PRI_MAX) pri = PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1691	next_pri = pri + PRI_BIAS;
		1692	}
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	aioreq_nice (int nice = 0)
		1698	CODE:
		1699	nice = next_pri - nice;
		1700	if (nice < PRI_MIN) nice = PRI_MIN;
		1701	if (nice > PRI_MAX) nice = PRI_MAX;
		1702	next_pri = nice + PRI_BIAS;
1313		1703
1314	void	1704	void
1315	flush ()	1705	flush ()
1316	PROTOTYPE:	1706	PROTOTYPE:
1317	CODE:	1707	CODE:
…		…
1319	{	1709	{
1320	poll_wait ();	1710	poll_wait ();
1321	poll_cb ();	1711	poll_cb ();
1322	}	1712	}
1323		1713
1324	void	1714	int
1325	poll()	1715	poll()
1326	PROTOTYPE:	1716	PROTOTYPE:
1327	CODE:	1717	CODE:
1328	if (nreqs)
1329	{
1330	poll_wait ();	1718	poll_wait ();
1331	poll_cb ();	1719	RETVAL = poll_cb ();
1332	}	1720	OUTPUT:
		1721	RETVAL
1333		1722
1334	int	1723	int
1335	poll_fileno()	1724	poll_fileno()
1336	PROTOTYPE:	1725	PROTOTYPE:
1337	CODE:	1726	CODE:
…		…
1349		1738
1350	void	1739	void
1351	poll_wait()	1740	poll_wait()
1352	PROTOTYPE:	1741	PROTOTYPE:
1353	CODE:	1742	CODE:
1354	if (nreqs)
1355	poll_wait ();	1743	poll_wait ();
		1744
		1745	void
		1746	setsig (int signum = SIGIO)
		1747	PROTOTYPE: ;$
		1748	CODE:
		1749	{
		1750	if (block_sig_level)
		1751	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1752
		1753	LOCK (reslock);
		1754	main_tid = pthread_self ();
		1755	main_sig = signum;
		1756	UNLOCK (reslock);
		1757
		1758	if (main_sig && npending)
		1759	pthread_kill (main_tid, main_sig);
		1760	}
		1761
		1762	void
		1763	aio_block (SV *cb)
		1764	PROTOTYPE: &
		1765	PPCODE:
		1766	{
		1767	int count;
		1768
		1769	block_sig ();
		1770	PUSHMARK (SP);
		1771	PUTBACK;
		1772	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1773	SPAGAIN;
		1774	unblock_sig ();
		1775
		1776	if (SvTRUE (ERRSV))
		1777	croak (0);
		1778
		1779	XSRETURN (count);
		1780	}
1356		1781
1357	int	1782	int
1358	nreqs()	1783	nreqs()
1359	PROTOTYPE:	1784	PROTOTYPE:
1360	CODE:	1785	CODE:
1361	RETVAL = nreqs;	1786	RETVAL = nreqs;
1362	OUTPUT:	1787	OUTPUT:
1363	RETVAL	1788	RETVAL
1364		1789
		1790	int
		1791	nready()
		1792	PROTOTYPE:
		1793	CODE:
		1794	RETVAL = get_nready ();
		1795	OUTPUT:
		1796	RETVAL
		1797
		1798	int
		1799	npending()
		1800	PROTOTYPE:
		1801	CODE:
		1802	RETVAL = get_npending ();
		1803	OUTPUT:
		1804	RETVAL
		1805
		1806	int
		1807	nthreads()
		1808	PROTOTYPE:
		1809	CODE:
		1810	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1811	RETVAL = started;
		1812	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1813	OUTPUT:
		1814	RETVAL
		1815
1365	PROTOTYPES: DISABLE	1816	PROTOTYPES: DISABLE
1366		1817
1367	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1818	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1368		1819
1369	void	1820	void
…		…
1384	PPCODE:	1835	PPCODE:
1385	{	1836	{
1386	int i;	1837	int i;
1387	aio_req req;	1838	aio_req req;
1388		1839
		1840	if (main_sig && !block_sig_level)
		1841	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1842
1389	if (grp->fd == 2)	1843	if (grp->int1 == 2)
1390	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1844	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1391		1845
1392	for (i = 1; i < items; ++i )	1846	for (i = 1; i < items; ++i )
1393	{	1847	{
1394	if (GIMME_V != G_VOID)	1848	if (GIMME_V != G_VOID)
…		…
1396		1850
1397	req = SvAIO_REQ (ST (i));	1851	req = SvAIO_REQ (ST (i));
1398		1852
1399	if (req)	1853	if (req)
1400	{	1854	{
1401	++grp->length;	1855	++grp->size;
1402	req->grp = grp;	1856	req->grp = grp;
1403		1857
1404	req->grp_prev = 0;	1858	req->grp_prev = 0;
1405	req->grp_next = grp->grp_first;	1859	req->grp_next = grp->grp_first;
1406		1860
…		…
1411	}	1865	}
1412	}	1866	}
1413	}	1867	}
1414		1868
1415	void	1869	void
		1870	cancel_subs (aio_req_ornot req)
		1871	CODE:
		1872	req_cancel_subs (req);
		1873
		1874	void
1416	result (aio_req grp, ...)	1875	result (aio_req grp, ...)
1417	CODE:	1876	CODE:
1418	{	1877	{
1419	int i;	1878	int i;
		1879	AV *av;
		1880
		1881	grp->errorno = errno;
		1882
1420	AV *av = newAV ();	1883	av = newAV ();
1421		1884
1422	for (i = 1; i < items; ++i )	1885	for (i = 1; i < items; ++i )
1423	av_push (av, newSVsv (ST (i)));	1886	av_push (av, newSVsv (ST (i)));
1424		1887
1425	SvREFCNT_dec (grp->data);	1888	SvREFCNT_dec (grp->sv1);
1426	grp->data = (SV *)av;	1889	grp->sv1 = (SV *)av;
1427	}	1890	}
		1891
		1892	void
		1893	errno (aio_req grp, int errorno = errno)
		1894	CODE:
		1895	grp->errorno = errorno;
1428		1896
1429	void	1897	void
1430	limit (aio_req grp, int limit)	1898	limit (aio_req grp, int limit)
1431	CODE:	1899	CODE:
1432	grp->fd2 = limit;	1900	grp->int2 = limit;
1433	aio_grp_feed (grp);	1901	aio_grp_feed (grp);
1434		1902
1435	void	1903	void
1436	feed (aio_req grp, SV *callback=&PL_sv_undef)	1904	feed (aio_req grp, SV *callback=&PL_sv_undef)
1437	CODE:	1905	CODE:
1438	{	1906	{
1439	SvREFCNT_dec (grp->fh2);	1907	SvREFCNT_dec (grp->sv2);
1440	grp->fh2 = newSVsv (callback);	1908	grp->sv2 = newSVsv (callback);
1441		1909
1442	if (grp->fd2 <= 0)	1910	if (grp->int2 <= 0)
1443	grp->fd2 = 2;	1911	grp->int2 = 2;
1444		1912
1445	aio_grp_feed (grp);	1913	aio_grp_feed (grp);
1446	}	1914	}
1447		1915

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