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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs.
Revision 1.84 by root, Sat Oct 28 01:24:19 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
34	# else	43	# else
35	# error sendfile support requested but not available	44	# error sendfile support requested but not available
36	# endif	45	# endif
37	#endif	46	#endif
38		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
39	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	52	#ifndef NAME_MAX
41	# define NAME_MAX 4096	53	# define NAME_MAX 4096
42	#endif	54	#endif
43		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
44	#if __ia64	61	#if __ia64
45	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	65	#else
47	# define STACKSIZE 8192	66	# define STACKSIZE 16384
		67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDREAD_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDREAD_UNSAFE 0
		76	# else
		77	# define WORDREAD_UNSAFE 1
48	#endif	78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
49		91
50	enum {	92	enum {
51	REQ_QUIT,	93	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	96	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	102	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	103	REQ_BUSY,
62	};	104	};
63		105
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		108
67	typedef struct aio_cb	109	typedef struct aio_cb
68	{	110	{
69	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74		112
75	SV *data, *callback;	113	SV *data, *callback;
76	SV *fh, *fh2;	114	SV *fh, *fh2;
77	void *dataptr, *data2ptr;	115	void *dataptr, *data2ptr;
78	Stat_t *statdata;	116	Stat_t *statdata;
79	off_t offset;	117	off_t offset;
80	size_t length;	118	size_t length;
81	ssize_t result;	119	ssize_t result;
82		120
		121	STRLEN dataoffset;
83	int type;	122	int type;
84	int fd, fd2;	123	int fd, fd2;
85	int errorno;	124	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	125	mode_t mode; /* open */
		126
88	unsigned char cancelled;	127	unsigned char flags;
		128	unsigned char pri;
		129
		130	SV *self; /* the perl counterpart of this request, if any */
		131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
89	} aio_cb;	132	} aio_cb;
		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	};
90		137
91	typedef aio_cb *aio_req;	138	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	139	typedef aio_cb *aio_req_ornot;
93		140
		141	enum {
		142	PRI_MIN = -4,
		143	PRI_MAX = 4,
		144
		145	DEFAULT_PRI = 0,
		146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		148	};
		149
		150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		151
94	static int started, wanted;	152	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	153
96	static int max_outstanding = 1<<30;	154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		156	#else
		157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		158	#endif
		159
		160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		162
		163	/* worker threads management */
		164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		165
		166	typedef struct worker {
		167	/* locked by wrklock */
		168	struct worker *prev, *next;
		169
		170	pthread_t tid;
		171
		172	/* locked by reslock, reqlock or wrklock */
		173	aio_req req; /* currently processed request */
		174	void *dbuf;
		175	DIR *dirp;
		176	} worker;
		177
		178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		179
		180	static void worker_clear (worker *wrk)
		181	{
		182	if (wrk->dirp)
		183	{
		184	closedir (wrk->dirp);
		185	wrk->dirp = 0;
		186	}
		187
		188	if (wrk->dbuf)
		189	{
		190	free (wrk->dbuf);
		191	wrk->dbuf = 0;
		192	}
		193	}
		194
		195	static void worker_free (worker *wrk)
		196	{
		197	wrk->next->prev = wrk->prev;
		198	wrk->prev->next = wrk->next;
		199
		200	free (wrk);
		201	}
		202
		203	static volatile unsigned int nreqs, nready, npending;
		204	static volatile unsigned int max_idle = 4;
		205	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	206	static int respipe [2];
98		207
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		211
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		213
		214	static unsigned int get_nready ()
		215	{
		216	unsigned int retval;
		217
		218	LOCK (reqlock);
		219	retval = nready;
		220	UNLOCK (reqlock);
		221
		222	return retval;
		223	}
		224
		225	static unsigned int get_npending ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reslock);
		230	retval = npending;
		231	UNLOCK (reslock);
		232
		233	return retval;
		234	}
		235
		236	#else
		237
		238	# define get_nready() nready
		239	# define get_npending() npending
		240
		241	#endif
		242
		243	/*
		244	* a somewhat faster data structure might be nice, but
		245	* with 8 priorities this actually needs <20 insns
		246	* per shift, the most expensive operation.
		247	*/
		248	typedef struct {
		249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		250	int size;
		251	} reqq;
		252
		253	static reqq req_queue;
		254	static reqq res_queue;
		255
		256	int reqq_push (reqq *q, aio_req req)
		257	{
		258	int pri = req->pri;
		259	req->next = 0;
		260
		261	if (q->qe[pri])
		262	{
		263	q->qe[pri]->next = req;
		264	q->qe[pri] = req;
		265	}
		266	else
		267	q->qe[pri] = q->qs[pri] = req;
		268
		269	return q->size++;
		270	}
		271
		272	aio_req reqq_shift (reqq *q)
		273	{
		274	int pri;
		275
		276	if (!q->size)
		277	return 0;
		278
		279	--q->size;
		280
		281	for (pri = NUM_PRI; pri--; )
		282	{
		283	aio_req req = q->qs[pri];
		284
		285	if (req)
		286	{
		287	if (!(q->qs[pri] = req->next))
		288	q->qe[pri] = 0;
		289
		290	return req;
		291	}
		292	}
		293
		294	abort ();
		295	}
		296
		297	static int poll_cb (int max);
106	static void req_invoke (aio_req req);	298	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
108		301
109	/* must be called at most once */	302	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	303	static SV *req_sv (aio_req req, const char *klass)
111	{	304	{
112	if (!req->self)	305	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	324	}
132		325
133	static void aio_grp_feed (aio_req grp)	326	static void aio_grp_feed (aio_req grp)
134	{	327	{
135	while (grp->length < grp->fd2)	328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
136	{	329	{
137	int old_len = grp->length;	330	int old_len = grp->length;
138		331
139	if (grp->fh2 && SvOK (grp->fh2))	332	if (grp->fh2 && SvOK (grp->fh2))
140	{	333	{
…		…
143	ENTER;	336	ENTER;
144	SAVETMPS;	337	SAVETMPS;
145	PUSHMARK (SP);	338	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;	340	PUTBACK;
148	call_sv (grp->fh2, G_VOID | G_EVAL);	341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
149	SPAGAIN;	342	SPAGAIN;
150	FREETMPS;	343	FREETMPS;
151	LEAVE;	344	LEAVE;
152	}	345	}
153		346
…		…
174	req_invoke (grp);	367	req_invoke (grp);
175	req_free (grp);	368	req_free (grp);
176	}	369	}
177	}	370	}
178		371
179	static void poll_wait ()
180	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)	372	static void req_invoke (aio_req req)
192	{	373	{
193	dSP;	374	dSP;
194	int errorno = errno;
195		375
196	if (req->cancelled || !SvOK (req->callback))	376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
197	return;	377	{
198
199	errno = req->errorno;
200
201	ENTER;	378	ENTER;
202	SAVETMPS;	379	SAVETMPS;
203	PUSHMARK (SP);	380	PUSHMARK (SP);
204	EXTEND (SP, 1);	381	EXTEND (SP, 1);
205		382
206	switch (req->type)	383	switch (req->type)
207	{
208	case REQ_READDIR:
209	{	384	{
210	SV *rv = &PL_sv_undef;	385	case REQ_READDIR:
211
212	if (req->result >= 0)
213	{	386	{
214	char *buf = req->data2ptr;	387	SV *rv = &PL_sv_undef;
215	AV *av = newAV ();
216		388
217	while (req->result)	389	if (req->result >= 0)
218	{	390	{
		391	int i;
		392	char *buf = req->data2ptr;
		393	AV *av = newAV ();
		394
		395	av_extend (av, req->result - 1);
		396
		397	for (i = 0; i < req->result; ++i)
		398	{
219	SV *sv = newSVpv (buf, 0);	399	SV *sv = newSVpv (buf, 0);
220		400
221	av_push (av, sv);	401	av_store (av, i, sv);
222	buf += SvCUR (sv) + 1;	402	buf += SvCUR (sv) + 1;
223	req->result--;	403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
224	}	406	}
225		407
226	rv = sv_2mortal (newRV_noinc ((SV *)av));	408	PUSHs (rv);
227	}	409	}
		410	break;
228		411
229	PUSHs (rv);	412	case REQ_OPEN:
		413	{
		414	/* convert fd to fh */
		415	SV *fh;
		416
		417	PUSHs (sv_2mortal (newSViv (req->result)));
		418	PUTBACK;
		419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		420	SPAGAIN;
		421
		422	fh = SvREFCNT_inc (POPs);
		423
		424	PUSHMARK (SP);
		425	XPUSHs (sv_2mortal (fh));
		426	}
		427	break;
		428
		429	case REQ_GROUP:
		430	req->fd = 2; /* mark group as finished */
		431
		432	if (req->data)
		433	{
		434	int i;
		435	AV *av = (AV *)req->data;
		436
		437	EXTEND (SP, AvFILL (av) + 1);
		438	for (i = 0; i <= AvFILL (av); ++i)
		439	PUSHs (*av_fetch (av, i, 0));
		440	}
		441	break;
		442
		443	case REQ_NOP:
		444	case REQ_BUSY:
		445	break;
		446
		447	default:
		448	PUSHs (sv_2mortal (newSViv (req->result)));
		449	break;
230	}	450	}
231	break;
232		451
233	case REQ_OPEN:	452	errno = req->errorno;
234	{
235	/* convert fd to fh */
236	SV *fh;
237		453
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;	454	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_SLEEP:
265	break;
266
267	default:
268	PUSHs (sv_2mortal (newSViv (req->result)));
269	break;
270	}
271
272
273	PUTBACK;
274	call_sv (req->callback, G_VOID | G_EVAL);	455	call_sv (req->callback, G_VOID | G_EVAL);
275	SPAGAIN;	456	SPAGAIN;
276		457
277	FREETMPS;	458	FREETMPS;
278	LEAVE;	459	LEAVE;
279
280	errno = errorno;
281
282	if (SvTRUE (ERRSV))
283	{	460	}
284	req_free (req);
285	croak (0);
286	}
287	}
288		461
289	static void req_free (aio_req req)
290	{
291	if (req->grp)	462	if (req->grp)
292	{	463	{
293	aio_req grp = req->grp;	464	aio_req grp = req->grp;
294		465
295	/* unlink request */	466	/* unlink request */
…		…
300	grp->grp_first = req->grp_next;	471	grp->grp_first = req->grp_next;
301		472
302	aio_grp_dec (grp);	473	aio_grp_dec (grp);
303	}	474	}
304		475
		476	if (SvTRUE (ERRSV))
		477	{
		478	req_free (req);
		479	croak (0);
		480	}
		481	}
		482
		483	static void req_free (aio_req req)
		484	{
305	if (req->self)	485	if (req->self)
306	{	486	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	487	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	488	SvREFCNT_dec (req->self);
309	}	489	}
…		…
312	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
313	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
314	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);	495	Safefree (req->statdata);
316		496
317	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
318	free (req->data2ptr);	498	free (req->data2ptr);
319		499
320	Safefree (req);	500	Safefree (req);
321	}	501	}
322		502
		503	static void req_cancel_subs (aio_req grp)
		504	{
		505	aio_req sub;
		506
		507	if (grp->type != REQ_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->fh2);
		511	grp->fh2 = 0;
		512
		513	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		514	req_cancel (sub);
		515	}
		516
323	static void req_cancel (aio_req req)	517	static void req_cancel (aio_req req)
324	{	518	{
325	req->cancelled = 1;	519	req->flags |= FLAG_CANCELLED;
326		520
327	if (req->type == REQ_GROUP)	521	req_cancel_subs (req);
328	{	522	}
329	aio_req sub;
330		523
331	for (sub = req->grp_first; sub; sub = sub->grp_next)	524	static void *aio_proc(void *arg);
332	req_cancel (sub);	525
		526	static void start_thread (void)
		527	{
		528	sigset_t fullsigset, oldsigset;
		529	pthread_attr_t attr;
		530
		531	worker *wrk = calloc (1, sizeof (worker));
		532
		533	if (!wrk)
		534	croak ("unable to allocate worker thread data");
		535
		536	pthread_attr_init (&attr);
		537	pthread_attr_setstacksize (&attr, STACKSIZE);
		538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		539	#ifdef PTHREAD_SCOPE_PROCESS
		540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		541	#endif
		542
		543	sigfillset (&fullsigset);
		544
		545	LOCK (wrklock);
		546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		547
		548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
333	}	549	{
334	}	550	wrk->prev = &wrk_first;
		551	wrk->next = wrk_first.next;
		552	wrk_first.next->prev = wrk;
		553	wrk_first.next = wrk;
		554	++started;
		555	}
		556	else
		557	free (wrk);
335		558
		559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		560	UNLOCK (wrklock);
		561	}
		562
		563	static void maybe_start_thread ()
		564	{
		565	if (started >= wanted)
		566	return;
		567
		568	/* todo: maybe use idle here, but might be less exact */
		569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
		570	return;
		571
		572	start_thread ();
		573	}
		574
		575	static void req_send (aio_req req)
		576	{
		577	++nreqs;
		578
		579	LOCK (reqlock);
		580	++nready;
		581	reqq_push (&req_queue, req);
		582	pthread_cond_signal (&reqwait);
		583	UNLOCK (reqlock);
		584
		585	maybe_start_thread ();
		586	}
		587
		588	static void end_thread (void)
		589	{
		590	aio_req req;
		591
		592	Newz (0, req, 1, aio_cb);
		593
		594	req->type = REQ_QUIT;
		595	req->pri = PRI_MAX + PRI_BIAS;
		596
		597	LOCK (reqlock);
		598	reqq_push (&req_queue, req);
		599	pthread_cond_signal (&reqwait);
		600	UNLOCK (reqlock);
		601
		602	LOCK (wrklock);
		603	--started;
		604	UNLOCK (wrklock);
		605	}
		606
		607	static void min_parallel (int nthreads)
		608	{
		609	if (wanted < nthreads)
		610	wanted = nthreads;
		611	}
		612
		613	static void max_parallel (int nthreads)
		614	{
		615	if (wanted > nthreads)
		616	wanted = nthreads;
		617
		618	while (started > wanted)
		619	end_thread ();
		620	}
		621
		622	static void poll_wait ()
		623	{
		624	fd_set rfd;
		625
		626	while (nreqs)
		627	{
		628	int size;
		629	if (WORDREAD_UNSAFE) LOCK (reslock);
		630	size = res_queue.size;
		631	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		632
		633	if (size)
		634	return;
		635
		636	maybe_start_thread ();
		637
		638	FD_ZERO(&rfd);
		639	FD_SET(respipe [0], &rfd);
		640
		641	select (respipe [0] + 1, &rfd, 0, 0, 0);
		642	}
		643	}
		644
336	static int poll_cb ()	645	static int poll_cb (int max)
337	{	646	{
338	dSP;	647	dSP;
339	int count = 0;	648	int count = 0;
340	int do_croak = 0;	649	int do_croak = 0;
341	aio_req req;	650	aio_req req;
342		651
343	for (;;)	652	for (;;)
344	{	653	{
345	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
346	req = ress;
347
348	if (req)
349	{	655	{
350	ress = req->next;	656	maybe_start_thread ();
351		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
352	if (!ress)	661	if (req)
353	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
354	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
355	char buf [32];	668	char buf [32];
356	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
357	;	671	}
358
359	rese = 0;
360	}	672	}
		673
		674	UNLOCK (reslock);
		675
		676	if (!req)
		677	break;
		678
		679	--nreqs;
		680
		681	if (req->type == REQ_GROUP && req->length)
		682	{
		683	req->fd = 1; /* mark request as delayed */
		684	continue;
		685	}
		686	else
		687	{
		688	if (req->type == REQ_READ)
		689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		690
		691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		692	SvREADONLY_off (req->data);
		693
		694	if (req->statdata)
		695	{
		696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		697	PL_laststatval = req->result;
		698	PL_statcache = *(req->statdata);
		699	}
		700
		701	req_invoke (req);
		702
		703	count++;
		704	}
		705
		706	req_free (req);
361	}	707	}
362		708
363	pthread_mutex_unlock (&reslock);	709	if (nreqs <= max_outstanding)
364
365	if (!req)
366	break;	710	break;
367		711
368	--nreqs;	712	poll_wait ();
369		713
370	if (req->type == REQ_QUIT)	714	max = 0;
371	started--;
372	else if (req->type == REQ_GROUP && req->length)
373	{
374	req->fd = 1; /* mark request as delayed */
375	continue;
376	}
377	else
378	{
379	if (req->type == REQ_READ)
380	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
381
382	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
383	SvREADONLY_off (req->data);
384
385	if (req->statdata)
386	{
387	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
388	PL_laststatval = req->result;
389	PL_statcache = *(req->statdata);
390	}
391
392	req_invoke (req);
393
394	count++;
395	}
396
397	req_free (req);
398	}	715	}
399		716
400	return count;	717	return count;
401	}
402
403	static void *aio_proc(void *arg);
404
405	static void start_thread (void)
406	{
407	sigset_t fullsigset, oldsigset;
408	pthread_t tid;
409	pthread_attr_t attr;
410
411	pthread_attr_init (&attr);
412	pthread_attr_setstacksize (&attr, STACKSIZE);
413	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
414
415	sigfillset (&fullsigset);
416	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
417
418	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
419	started++;
420
421	sigprocmask (SIG_SETMASK, &oldsigset, 0);
422	}
423
424	static void req_send (aio_req req)
425	{
426	while (started < wanted && nreqs >= started)
427	start_thread ();
428
429	++nreqs;
430
431	pthread_mutex_lock (&reqlock);
432
433	req->next = 0;
434
435	if (reqe)
436	{
437	reqe->next = req;
438	reqe = req;
439	}
440	else
441	reqe = reqs = req;
442
443	pthread_cond_signal (&reqwait);
444	pthread_mutex_unlock (&reqlock);
445
446	if (nreqs > max_outstanding)
447	for (;;)
448	{
449	poll_cb ();
450
451	if (nreqs <= max_outstanding)
452	break;
453
454	poll_wait ();
455	}
456	}
457
458	static void end_thread (void)
459	{
460	aio_req req;
461	Newz (0, req, 1, aio_cb);
462	req->type = REQ_QUIT;
463
464	req_send (req);
465	}
466
467	static void min_parallel (int nthreads)
468	{
469	if (wanted < nthreads)
470	wanted = nthreads;
471	}
472
473	static void max_parallel (int nthreads)
474	{
475	int cur = started;
476
477	if (wanted > nthreads)
478	wanted = nthreads;
479
480	while (cur > wanted)
481	{
482	end_thread ();
483	cur--;
484	}
485
486	while (started > wanted)
487	{
488	poll_wait ();
489	poll_cb ();
490	}
491	}	718	}
492		719
493	static void create_pipe ()	720	static void create_pipe ()
494	{	721	{
495	if (pipe (respipe))	722	if (pipe (respipe))
…		…
519	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
520	{	747	{
521	ssize_t res;	748	ssize_t res;
522	off_t ooffset;	749	off_t ooffset;
523		750
524	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
525	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
526	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
527	res = read (fd, buf, count);	754	res = read (fd, buf, count);
528	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
529	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
530		757
531	return res;	758	return res;
532	}	759	}
533		760
534	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
535	{	762	{
536	ssize_t res;	763	ssize_t res;
537	off_t ooffset;	764	off_t ooffset;
538		765
539	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
540	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
541	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
542	res = write (fd, buf, count);	769	res = write (fd, buf, count);
543	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
544	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
545		772
546	return res;	773	return res;
547	}	774	}
548	#endif	775	#endif
549		776
550	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
551	# define fdatasync fsync	778	# define fdatasync fsync
552	#endif	779	#endif
553		780
554	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
555	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
556		783
557	static ssize_t readahead (int fd, off_t offset, size_t count)	784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
558	{	785	{
559	char readahead_buf[4096];	786	dBUF;
560		787
561	while (count > 0)	788	while (count > 0)
562	{	789	{
563	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
564		791
565	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
566	offset += len;	793	offset += len;
567	count -= len;	794	count -= len;
568	}	795	}
569		796
570	errno = 0;	797	errno = 0;
571	}	798	}
		799
572	#endif	800	#endif
573		801
574	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
575	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
576		804
…		…
579	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
580	{	808	{
581	struct dirent *e;	809	struct dirent *e;
582	int errorno;	810	int errorno;
583		811
584	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
585		813
586	e = readdir (dirp);	814	e = readdir (dirp);
587	errorno = errno;	815	errorno = errno;
588		816
589	if (e)	817	if (e)
…		…
592	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
593	}	821	}
594	else	822	else
595	*res = 0;	823	*res = 0;
596		824
597	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
598		826
599	errno = errorno;	827	errno = errorno;
600	return e ? 0 : -1;	828	return e ? 0 : -1;
601	}	829	}
602	#endif	830	#endif
603		831
604	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
605	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
606	{	834	{
607	ssize_t res;	835	ssize_t res;
608		836
609	if (!count)	837	if (!count)
610	return 0;	838	return 0;
…		…
621	{	849	{
622	off_t sbytes;	850	off_t sbytes;
623	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
624		852
625	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
626	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
627	res = sbytes;	855	res = sbytes;
628	}	856	}
629		857
630	# elif __hpux	858	# elif __hpux
631	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
659	#endif	887	#endif
660	)	888	)
661	)	889	)
662	{	890	{
663	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
664	char buf[4096];	892	dBUF;
		893
665	res = 0;	894	res = 0;
666		895
667	while (count)	896	while (count)
668	{	897	{
669	ssize_t cnt;	898	ssize_t cnt;
670		899
671	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
672		901
673	if (cnt <= 0)	902	if (cnt <= 0)
674	{	903	{
675	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
676	break;	905	break;
677	}	906	}
678		907
679	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
680		909
681	if (cnt <= 0)	910	if (cnt <= 0)
682	{	911	{
683	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
684	break;	913	break;
…		…
692		921
693	return res;	922	return res;
694	}	923	}
695		924
696	/* read a full directory */	925	/* read a full directory */
697	static int scandir_ (const char *path, void **namesp)	926	static void scandir_ (aio_req req, worker *self)
698	{	927	{
699	DIR *dirp = opendir (path);	928	DIR *dirp;
700	union	929	union
701	{	930	{
702	struct dirent d;	931	struct dirent d;
703	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
704	} u;	933	} *u;
705	struct dirent *entp;	934	struct dirent *entp;
706	char *name, *names;	935	char *name, *names;
707	int memlen = 4096;	936	int memlen = 4096;
708	int memofs = 0;	937	int memofs = 0;
709	int res = 0;	938	int res = 0;
710	int errorno;	939	int errorno;
711		940
712	if (!dirp)	941	LOCK (wrklock);
713	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
714		943	self->dbuf = u = malloc (sizeof (*u));
715	names = malloc (memlen);	944	req->data2ptr = names = malloc (memlen);
		945	UNLOCK (wrklock);
		946
		947	if (dirp && u && names)
		948	for (;;)
		949	{
		950	errno = 0;
		951	readdir_r (dirp, &u->d, &entp);
		952
		953	if (!entp)
		954	break;
		955
		956	name = entp->d_name;
		957
		958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		959	{
		960	int len = strlen (name) + 1;
		961
		962	res++;
		963
		964	while (memofs + len > memlen)
		965	{
		966	memlen *= 2;
		967	LOCK (wrklock);
		968	req->data2ptr = names = realloc (names, memlen);
		969	UNLOCK (wrklock);
		970
		971	if (!names)
		972	break;
		973	}
		974
		975	memcpy (names + memofs, name, len);
		976	memofs += len;
		977	}
		978	}
		979
		980	if (errno)
		981	res = -1;
		982
		983	req->result = res;
		984	}
		985
		986	/*****************************************************************************/
		987
		988	static void *aio_proc (void *thr_arg)
		989	{
		990	aio_req req;
		991	struct timespec ts;
		992	worker *self = (worker *)thr_arg;
		993
		994	/* try to distribute timeouts somewhat evenly */
		995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		996	* (1000000000UL / 1024UL);
716		997
717	for (;;)	998	for (;;)
718	{	999	{
719	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
720		1001
721	if (!entp)	1002	LOCK (reqlock);
722	break;
723
724	name = entp->d_name;
725
726	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
727	{
728	int len = strlen (name) + 1;
729
730	res++;
731
732	while (memofs + len > memlen)
733	{
734	memlen *= 2;
735	names = realloc (names, memlen);
736	if (!names)
737	break;
738	}
739
740	memcpy (names + memofs, name, len);
741	memofs += len;
742	}
743	}
744
745	errorno = errno;
746	closedir (dirp);
747
748	if (errorno)
749	{
750	free (names);
751	errno = errorno;
752	res = -1;
753	}
754
755	*namesp = (void *)names;
756	return res;
757	}
758
759	/*****************************************************************************/
760
761	static void *aio_proc (void *thr_arg)
762	{
763	aio_req req;
764	int type;
765
766	do
767	{
768	pthread_mutex_lock (&reqlock);
769		1003
770	for (;;)	1004	for (;;)
771	{	1005	{
772	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
773
774	if (reqs)
775	{
776	reqs = reqs->next;
777	if (!reqs) reqe = 0;
778	}
779		1007
780	if (req)	1008	if (req)
781	break;	1009	break;
782		1010
		1011	++idle;
		1012
		1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1014	== ETIMEDOUT)
		1015	{
		1016	if (idle > max_idle)
		1017	{
		1018	--idle;
		1019	UNLOCK (reqlock);
		1020	LOCK (wrklock);
		1021	--started;
		1022	UNLOCK (wrklock);
		1023	goto quit;
		1024	}
		1025
		1026	/* we are allowed to idle, so do so without any timeout */
783	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
784	}	1032	}
785		1033
786	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
787		1037
788	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
789		1039
790	if (!req->cancelled)	1040	if (!(req->flags & FLAG_CANCELLED))
791	switch (type = req->type) /* remember type for QUIT check */	1041	switch (req->type)
792	{	1042	{
793	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
794	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
795		1045
796	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
797	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
798		1048
799	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
800	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
801	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
802		1052
…		…
805	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
806	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
807	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
808	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
809	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
810		1061
811	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
812	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
813	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
814		1065
815	case REQ_SLEEP:	1066	case REQ_BUSY:
816	{	1067	{
817	struct timeval tv;	1068	struct timeval tv;
818		1069
819	tv.tv_sec = req->fd;	1070	tv.tv_sec = req->fd;
820	tv.tv_usec = req->fd2;	1071	tv.tv_usec = req->fd2;
821		1072
822	req->result = select (0, 0, 0, 0, &tv);	1073	req->result = select (0, 0, 0, 0, &tv);
823	}	1074	}
824		1075
		1076	case REQ_GROUP:
		1077	case REQ_NOP:
		1078	break;
		1079
825	case REQ_QUIT:	1080	case REQ_QUIT:
826	break;	1081	goto quit;
827		1082
828	default:	1083	default:
829	req->result = ENOSYS;	1084	req->result = ENOSYS;
830	break;	1085	break;
831	}	1086	}
832		1087
833	req->errorno = errno;	1088	req->errorno = errno;
834		1089
835	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
836		1091
837	req->next = 0;	1092	++npending;
838		1093
839	if (rese)	1094	if (!reqq_push (&res_queue, req))
840	{
841	rese->next = req;
842	rese = req;
843	}
844	else
845	{
846	rese = ress = req;
847
848	/* write a dummy byte to the pipe so fh becomes ready */	1095	/* write a dummy byte to the pipe so fh becomes ready */
849	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
850	}
851		1097
852	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
853	}	1102	}
854	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
855		1108
856	return 0;	1109	return 0;
857	}	1110	}
858		1111
859	/*****************************************************************************/	1112	/*****************************************************************************/
860		1113
861	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
862	{	1115	{
863	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
864	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
865	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
866	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
867	#endif	1121	#endif
868	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
869	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
870	#endif	1124	#endif
871	}	1125	}
872		1126
873	static void atfork_parent (void)	1127	static void atfork_parent (void)
874	{	1128	{
875	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
876	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
877	#endif	1131	#endif
878	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
879	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
880	#endif	1134	#endif
881	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
882	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
883	}	1138	}
884		1139
885	static void atfork_child (void)	1140	static void atfork_child (void)
886	{	1141	{
887	aio_req prv;	1142	aio_req prv;
888		1143
		1144	while (prv = reqq_shift (&req_queue))
		1145	req_free (prv);
		1146
		1147	while (prv = reqq_shift (&res_queue))
		1148	req_free (prv);
		1149
		1150	while (wrk_first.next != &wrk_first)
		1151	{
		1152	worker *wrk = wrk_first.next;
		1153
		1154	if (wrk->req)
		1155	req_free (wrk->req);
		1156
		1157	worker_clear (wrk);
		1158	worker_free (wrk);
		1159	}
		1160
889	started = 0;	1161	started = 0;
890		1162	idle = 0;
891	while (reqs)	1163	nreqs = 0;
892	{	1164	nready = 0;
893	prv = reqs;	1165	npending = 0;
894	reqs = prv->next;
895	req_free (prv);
896	}
897
898	reqs = reqe = 0;
899
900	while (ress)
901	{
902	prv = ress;
903	ress = prv->next;
904	req_free (prv);
905	}
906
907	ress = rese = 0;
908		1166
909	close (respipe [0]);	1167	close (respipe [0]);
910	close (respipe [1]);	1168	close (respipe [1]);
911	create_pipe ();	1169	create_pipe ();
912		1170
913	atfork_parent ();	1171	atfork_parent ();
914	}	1172	}
915		1173
916	#define dREQ \	1174	#define dREQ \
917	aio_req req; \	1175	aio_req req; \
		1176	int req_pri = next_pri; \
		1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
918	\	1178	\
919	if (SvOK (callback) && !SvROK (callback)) \	1179	if (SvOK (callback) && !SvROK (callback)) \
920	croak ("callback must be undef or of reference type"); \	1180	croak ("callback must be undef or of reference type"); \
921	\	1181	\
922	Newz (0, req, 1, aio_cb); \	1182	Newz (0, req, 1, aio_cb); \
923	if (!req) \	1183	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	1184	croak ("out of memory during aio_req allocation"); \
925	\	1185	\
926	req->callback = newSVsv (callback)	1186	req->callback = newSVsv (callback); \
		1187	req->pri = req_pri
927		1188
928	#define REQ_SEND \	1189	#define REQ_SEND \
929	req_send (req); \	1190	req_send (req); \
930	\	1191	\
931	if (GIMME_V != G_VOID) \	1192	if (GIMME_V != G_VOID) \
…		…
936	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
937		1198
938	BOOT:	1199	BOOT:
939	{	1200	{
940	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
941	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
942	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
943	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
944		1209
945	create_pipe ();	1210	create_pipe ();
946	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
947	}	1212	}
948		1213
949	void	1214	void
950	min_parallel (nthreads)	1215	min_parallel (int nthreads)
951	int nthreads
952	PROTOTYPE: $	1216	PROTOTYPE: $
953		1217
954	void	1218	void
955	max_parallel (nthreads)	1219	max_parallel (int nthreads)
956	int nthreads
957	PROTOTYPE: $	1220	PROTOTYPE: $
958		1221
959	int	1222	int
960	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
961	int nreqs	1224	PROTOTYPE: $
962	PROTOTYPE: $
963	CODE:	1225	CODE:
964	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
965	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
966		1230
967	void	1231	void
968	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
969	SV * pathname	1233	SV * pathname
970	int flags	1234	int flags
…		…
1185		1449
1186	REQ_SEND;	1450	REQ_SEND;
1187	}	1451	}
1188		1452
1189	void	1453	void
		1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1455	SV * pathname
		1456	SV * callback
		1457	UV mode
		1458	UV dev
		1459	PPCODE:
		1460	{
		1461	dREQ;
		1462
		1463	req->type = REQ_MKNOD;
		1464	req->data = newSVsv (pathname);
		1465	req->dataptr = SvPVbyte_nolen (req->data);
		1466	req->mode = (mode_t)mode;
		1467	req->offset = dev;
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	1473	aio_busy (delay,callback=&PL_sv_undef)
1191	double delay	1474	double delay
1192	SV * callback	1475	SV * callback
1193	PPCODE:	1476	PPCODE:
1194	{	1477	{
1195	dREQ;	1478	dREQ;
1196		1479
1197	req->type = REQ_SLEEP;	1480	req->type = REQ_BUSY;
1198	req->fd = delay < 0. ? 0 : delay;	1481	req->fd = delay < 0. ? 0 : delay;
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1200		1483
1201	REQ_SEND;	1484	REQ_SEND;
1202	}	1485	}
…		…
1206	SV * callback	1489	SV * callback
1207	PROTOTYPE: ;$	1490	PROTOTYPE: ;$
1208	PPCODE:	1491	PPCODE:
1209	{	1492	{
1210	dREQ;	1493	dREQ;
		1494
1211	req->type = REQ_GROUP;	1495	req->type = REQ_GROUP;
1212	req_send (req);	1496	req_send (req);
		1497
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1214	}	1499	}
		1500
		1501	void
		1502	aio_nop (callback=&PL_sv_undef)
		1503	SV * callback
		1504	PPCODE:
		1505	{
		1506	dREQ;
		1507
		1508	req->type = REQ_NOP;
		1509
		1510	REQ_SEND;
		1511	}
		1512
		1513	int
		1514	aioreq_pri (int pri = 0)
		1515	PROTOTYPE: ;$
		1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
		1520	if (pri < PRI_MIN) pri = PRI_MIN;
		1521	if (pri > PRI_MAX) pri = PRI_MAX;
		1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	void
		1528	aioreq_nice (int nice = 0)
		1529	CODE:
		1530	nice = next_pri - nice;
		1531	if (nice < PRI_MIN) nice = PRI_MIN;
		1532	if (nice > PRI_MAX) nice = PRI_MAX;
		1533	next_pri = nice + PRI_BIAS;
1215		1534
1216	void	1535	void
1217	flush ()	1536	flush ()
1218	PROTOTYPE:	1537	PROTOTYPE:
1219	CODE:	1538	CODE:
1220	while (nreqs)	1539	while (nreqs)
1221	{	1540	{
1222	poll_wait ();	1541	poll_wait ();
1223	poll_cb ();	1542	poll_cb (0);
1224	}	1543	}
1225		1544
1226	void	1545	void
1227	poll()	1546	poll()
1228	PROTOTYPE:	1547	PROTOTYPE:
1229	CODE:	1548	CODE:
1230	if (nreqs)	1549	if (nreqs)
1231	{	1550	{
1232	poll_wait ();	1551	poll_wait ();
1233	poll_cb ();	1552	poll_cb (0);
1234	}	1553	}
1235		1554
1236	int	1555	int
1237	poll_fileno()	1556	poll_fileno()
1238	PROTOTYPE:	1557	PROTOTYPE:
…		…
1243		1562
1244	int	1563	int
1245	poll_cb(...)	1564	poll_cb(...)
1246	PROTOTYPE:	1565	PROTOTYPE:
1247	CODE:	1566	CODE:
1248	RETVAL = poll_cb ();	1567	RETVAL = poll_cb (0);
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	poll_some(int max = 0)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = poll_cb (max);
1249	OUTPUT:	1576	OUTPUT:
1250	RETVAL	1577	RETVAL
1251		1578
1252	void	1579	void
1253	poll_wait()	1580	poll_wait()
…		…
1262	CODE:	1589	CODE:
1263	RETVAL = nreqs;	1590	RETVAL = nreqs;
1264	OUTPUT:	1591	OUTPUT:
1265	RETVAL	1592	RETVAL
1266		1593
1267	PROTOTYPES: DISABLE	1594	int
1268		1595	nready()
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270
1271	void
1272	cancel (aio_req_ornot req)
1273	PROTOTYPE:	1596	PROTOTYPE:
1274	CODE:	1597	CODE:
		1598	RETVAL = get_nready ();
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	int
		1603	npending()
		1604	PROTOTYPE:
		1605	CODE:
		1606	RETVAL = get_npending ();
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	PROTOTYPES: DISABLE
		1611
		1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1613
		1614	void
		1615	cancel (aio_req_ornot req)
		1616	CODE:
1275	req_cancel (req);	1617	req_cancel (req);
		1618
		1619	void
		1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1621	CODE:
		1622	SvREFCNT_dec (req->callback);
		1623	req->callback = newSVsv (callback);
1276		1624
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1626
1279	void	1627	void
1280	add (aio_req grp, ...)	1628	add (aio_req grp, ...)
…		…
1308	}	1656	}
1309	}	1657	}
1310	}	1658	}
1311		1659
1312	void	1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
1313	result (aio_req grp, ...)	1666	result (aio_req grp, ...)
1314	CODE:	1667	CODE:
1315	{	1668	{
1316	int i;	1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
1317	AV *av = newAV ();	1674	av = newAV ();
1318		1675
1319	for (i = 1; i < items; ++i )	1676	for (i = 1; i < items; ++i )
1320	av_push (av, newSVsv (ST (i)));	1677	av_push (av, newSVsv (ST (i)));
1321		1678
1322	SvREFCNT_dec (grp->data);	1679	SvREFCNT_dec (grp->data);
1323	grp->data = (SV *)av;	1680	grp->data = (SV *)av;
1324	}	1681	}
1325		1682
1326	void	1683	void
1327	lock (aio_req grp)	1684	errno (aio_req grp, int errorno = errno)
1328	CODE:	1685	CODE:
1329	++grp->length;	1686	grp->errorno = errorno;
1330		1687
1331	void	1688	void
1332	unlock (aio_req grp)
1333	CODE:
1334	aio_grp_dec (grp);
1335
1336	void
1337	feeder_limit (aio_req grp, int limit)	1689	limit (aio_req grp, int limit)
1338	CODE:	1690	CODE:
1339	grp->fd2 = limit;	1691	grp->fd2 = limit;
1340	aio_grp_feed (grp);	1692	aio_grp_feed (grp);
1341		1693
1342	void	1694	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1695	feed (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:	1696	CODE:
1345	{	1697	{
1346	SvREFCNT_dec (grp->fh2);	1698	SvREFCNT_dec (grp->fh2);
1347	grp->fh2 = newSVsv (callback);	1699	grp->fh2 = newSVsv (callback);
1348		1700

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