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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC vs.
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC

1	#define _REENTRANT 1	1	#include "xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "autoconf/config.h"
9		10
10	#include <pthread.h>
11
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>	14	#include <sys/time.h>
15	#include <sys/select.h>	15	#include <sys/select.h>
16	#include <sys/types.h>	16	#include <sys/types.h>
17	#include <sys/stat.h>	17	#include <sys/stat.h>
…		…
34	# else	34	# else
35	# error sendfile support requested but not available	35	# error sendfile support requested but not available
36	# endif	36	# endif
37	#endif	37	#endif
38		38
		39	/* number of seconds after which idle threads exit */
		40	#define IDLE_TIMEOUT 10
		41
39	/* used for struct dirent, AIX doesn't provide it */	42	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	43	#ifndef NAME_MAX
41	# define NAME_MAX 4096	44	# define NAME_MAX 4096
42	#endif	45	#endif
43		46
44	#if __ia64	47	/* buffer size for various temporary buffers */
45	# define STACKSIZE 65536	48	#define AIO_BUFSIZE 65536
46	#else	49
47	# define STACKSIZE 8192	50	#define dBUF \
48	#endif	51	char *aio_buf; \
		52	LOCK (wrklock); \
		53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		54	UNLOCK (wrklock); \
		55	if (!aio_buf) \
		56	return -1;
		57
		58	typedef SV SV8; /* byte-sv, used for argument-checking */
49		59
50	enum {	60	enum {
51	REQ_QUIT,	61	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	62	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	64	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	66	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
58	REQ_READDIR,	68	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
60	REQ_SLEEP,	70	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	71	REQ_BUSY,
62	};	72	};
63		73
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	74	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	75	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		76
67	typedef struct aio_cb	77	typedef struct aio_cb
68	{	78	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	79	struct aio_cb *volatile next;
72		80
		81	SV *callback, *fh;
		82	SV *sv1, *sv2;
		83	void *ptr1, *ptr2;
		84	off_t offs;
		85	size_t size;
		86	ssize_t result;
		87
		88	STRLEN stroffset;
		89	int type;
		90	int int1, int2;
		91	int errorno;
		92	mode_t mode; /* open */
		93
		94	unsigned char flags;
		95	unsigned char pri;
		96
73	SV *self; /* the perl counterpart of this request, if any */	97	SV *self; /* the perl counterpart of this request, if any */
74		98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;	99	} aio_cb;
		100
		101	enum {
		102	FLAG_CANCELLED = 0x01, /* request was cancelled */
		103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		105	};
90		106
91	typedef aio_cb *aio_req;	107	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	108	typedef aio_cb *aio_req_ornot;
93		109
		110	enum {
		111	PRI_MIN = -4,
		112	PRI_MAX = 4,
		113
		114	DEFAULT_PRI = 0,
		115	PRI_BIAS = -PRI_MIN,
		116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		117	};
		118
		119	#define AIO_TICKS ((1000000 + 1023) >> 10)
		120
		121	static unsigned int max_poll_time = 0;
		122	static unsigned int max_poll_reqs = 0;
		123
		124	/* calculcate time difference in ~1/AIO_TICKS of a second */
		125	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		126	{
		127	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		128	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		129	}
		130
		131	static thread_t main_tid;
		132	static int main_sig;
		133	static int block_sig_level;
		134
		135	void block_sig ()
		136	{
		137	sigset_t ss;
		138
		139	if (block_sig_level++)
		140	return;
		141
		142	if (!main_sig)
		143	return;
		144
		145	sigemptyset (&ss);
		146	sigaddset (&ss, main_sig);
		147	pthread_sigmask (SIG_BLOCK, &ss, 0);
		148	}
		149
		150	void unblock_sig ()
		151	{
		152	sigset_t ss;
		153
		154	if (--block_sig_level)
		155	return;
		156
		157	if (!main_sig)
		158	return;
		159
		160	sigemptyset (&ss);
		161	sigaddset (&ss, main_sig);
		162	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		163	}
		164
		165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		166
94	static int started, wanted;	167	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	168
96	static int max_outstanding = 1<<30;	169	/* worker threads management */
		170	static mutex_t wrklock = MUTEX_INIT;
		171
		172	typedef struct worker {
		173	/* locked by wrklock */
		174	struct worker *prev, *next;
		175
		176	thread_t tid;
		177
		178	/* locked by reslock, reqlock or wrklock */
		179	aio_req req; /* currently processed request */
		180	void *dbuf;
		181	DIR *dirp;
		182	} worker;
		183
		184	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		185
		186	static void worker_clear (worker *wrk)
		187	{
		188	if (wrk->dirp)
		189	{
		190	closedir (wrk->dirp);
		191	wrk->dirp = 0;
		192	}
		193
		194	if (wrk->dbuf)
		195	{
		196	free (wrk->dbuf);
		197	wrk->dbuf = 0;
		198	}
		199	}
		200
		201	static void worker_free (worker *wrk)
		202	{
		203	wrk->next->prev = wrk->prev;
		204	wrk->prev->next = wrk->next;
		205
		206	free (wrk);
		207	}
		208
		209	static volatile unsigned int nreqs, nready, npending;
		210	static volatile unsigned int max_idle = 4;
		211	static volatile unsigned int max_outstanding = 0xffffffff;
97	static int respipe [2];	212	static int respipe [2];
98		213
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	214	static mutex_t reslock = MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	215	static mutex_t reqlock = MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	216	static cond_t reqwait = COND_INIT;
102		217
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	218	#if WORDACCESS_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		219
		220	static unsigned int get_nready ()
		221	{
		222	unsigned int retval;
		223
		224	LOCK (reqlock);
		225	retval = nready;
		226	UNLOCK (reqlock);
		227
		228	return retval;
		229	}
		230
		231	static unsigned int get_npending ()
		232	{
		233	unsigned int retval;
		234
		235	LOCK (reslock);
		236	retval = npending;
		237	UNLOCK (reslock);
		238
		239	return retval;
		240	}
		241
		242	static unsigned int get_nthreads ()
		243	{
		244	unsigned int retval;
		245
		246	LOCK (wrklock);
		247	retval = started;
		248	UNLOCK (wrklock);
		249
		250	return retval;
		251	}
		252
		253	#else
		254
		255	# define get_nready() nready
		256	# define get_npending() npending
		257	# define get_nthreads() started
		258
		259	#endif
		260
		261	/*
		262	* a somewhat faster data structure might be nice, but
		263	* with 8 priorities this actually needs <20 insns
		264	* per shift, the most expensive operation.
		265	*/
		266	typedef struct {
		267	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		268	int size;
		269	} reqq;
		270
		271	static reqq req_queue;
		272	static reqq res_queue;
		273
		274	int reqq_push (reqq *q, aio_req req)
		275	{
		276	int pri = req->pri;
		277	req->next = 0;
		278
		279	if (q->qe[pri])
		280	{
		281	q->qe[pri]->next = req;
		282	q->qe[pri] = req;
		283	}
		284	else
		285	q->qe[pri] = q->qs[pri] = req;
		286
		287	return q->size++;
		288	}
		289
		290	aio_req reqq_shift (reqq *q)
		291	{
		292	int pri;
		293
		294	if (!q->size)
		295	return 0;
		296
		297	--q->size;
		298
		299	for (pri = NUM_PRI; pri--; )
		300	{
		301	aio_req req = q->qs[pri];
		302
		303	if (req)
		304	{
		305	if (!(q->qs[pri] = req->next))
		306	q->qe[pri] = 0;
		307
		308	return req;
		309	}
		310	}
		311
		312	abort ();
		313	}
		314
		315	static int poll_cb ();
		316	static int req_invoke (aio_req req);
106	static void req_free (aio_req req);	317	static void req_free (aio_req req);
		318	static void req_cancel (aio_req req);
107		319
108	/* must be called at most once */	320	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	321	static SV *req_sv (aio_req req, const char *klass)
110	{	322	{
		323	if (!req->self)
		324	{
111	req->self = (SV *)newHV ();	325	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	326	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		327	}
113		328
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	329	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	330	}
116		331
117	static aio_req SvAIO_REQ (SV *sv)	332	static aio_req SvAIO_REQ (SV *sv)
118	{	333	{
		334	MAGIC *mg;
		335
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	336	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	337	croak ("object of class " AIO_REQ_KLASS " expected");
121		338
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	339	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		340
124	return mg ? (aio_req)mg->mg_ptr : 0;	341	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	342	}
126		343
127	static void poll_wait ()	344	static void aio_grp_feed (aio_req grp)
128	{	345	{
129	if (nreqs && !ress)	346	block_sig ();
		347
		348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
130	{	349	{
131	fd_set rfd;	350	int old_len = grp->size;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		351
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	352	if (grp->sv2 && SvOK (grp->sv2))
		353	{
		354	dSP;
		355
		356	ENTER;
		357	SAVETMPS;
		358	PUSHMARK (SP);
		359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		360	PUTBACK;
		361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		362	SPAGAIN;
		363	FREETMPS;
		364	LEAVE;
		365	}
		366
		367	/* stop if no progress has been made */
		368	if (old_len == grp->size)
		369	{
		370	SvREFCNT_dec (grp->sv2);
		371	grp->sv2 = 0;
		372	break;
		373	}
136	}	374	}
137	}
138		375
		376	unblock_sig ();
		377	}
		378
		379	static void aio_grp_dec (aio_req grp)
		380	{
		381	--grp->size;
		382
		383	/* call feeder, if applicable */
		384	aio_grp_feed (grp);
		385
		386	/* finish, if done */
		387	if (!grp->size && grp->int1)
		388	{
		389	block_sig ();
		390
		391	if (!req_invoke (grp))
		392	{
		393	req_free (grp);
		394	unblock_sig ();
		395	croak (0);
		396	}
		397
		398	req_free (grp);
		399	unblock_sig ();
		400	}
		401	}
		402
139	static void req_invoke (aio_req req)	403	static int req_invoke (aio_req req)
140	{	404	{
141	dSP;	405	dSP;
142	int errorno = errno;
143		406
144	if (req->cancelled || !SvOK (req->callback))	407	if (req->flags & FLAG_SV1_RO_OFF)
145	return;	408	SvREADONLY_off (req->sv1);
146		409
147	errno = req->errorno;	410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
148
149	ENTER;
150	PUSHMARK (SP);
151	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	411	{
155	case REQ_READDIR:	412	ENTER;
		413	SAVETMPS;
		414	PUSHMARK (SP);
		415	EXTEND (SP, 1);
		416
		417	switch (req->type)
156	{	418	{
157	SV *rv = &PL_sv_undef;	419	case REQ_READDIR:
158
159	if (req->result >= 0)
160	{	420	{
161	char *buf = req->data2ptr;	421	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		422
164	while (req->result)	423	if (req->result >= 0)
165	{	424	{
		425	int i;
		426	char *buf = req->ptr2;
		427	AV *av = newAV ();
		428
		429	av_extend (av, req->result - 1);
		430
		431	for (i = 0; i < req->result; ++i)
		432	{
166	SV *sv = newSVpv (buf, 0);	433	SV *sv = newSVpv (buf, 0);
167		434
168	av_push (av, sv);	435	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	436	buf += SvCUR (sv) + 1;
170	req->result--;	437	}
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	440	}
172		441
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	442	PUSHs (rv);
174	}	443	}
		444	break;
175		445
		446	case REQ_OPEN:
		447	{
		448	/* convert fd to fh */
		449	SV *fh;
		450
		451	PUSHs (sv_2mortal (newSViv (req->result)));
		452	PUTBACK;
		453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		454	SPAGAIN;
		455
		456	fh = POPs;
		457	PUSHMARK (SP);
176	PUSHs (rv);	458	XPUSHs (fh);
		459	}
		460	break;
		461
		462	case REQ_GROUP:
		463	req->int1 = 2; /* mark group as finished */
		464
		465	if (req->sv1)
		466	{
		467	int i;
		468	AV *av = (AV *)req->sv1;
		469
		470	EXTEND (SP, AvFILL (av) + 1);
		471	for (i = 0; i <= AvFILL (av); ++i)
		472	PUSHs (*av_fetch (av, i, 0));
		473	}
		474	break;
		475
		476	case REQ_NOP:
		477	case REQ_BUSY:
		478	break;
		479
		480	case REQ_READLINK:
		481	if (req->result > 0)
		482	{
		483	SvCUR_set (req->sv1, req->result);
		484	*SvEND (req->sv1) = 0;
		485	PUSHs (req->sv1);
		486	}
		487	break;
		488
		489	case REQ_STAT:
		490	case REQ_LSTAT:
		491	case REQ_FSTAT:
		492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		493	PL_laststatval = req->result;
		494	PL_statcache = *(Stat_t *)(req->ptr2);
		495	PUSHs (sv_2mortal (newSViv (req->result)));
		496	break;
		497
		498	case REQ_READ:
		499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		500	*SvEND (req->sv1) = 0;
		501	PUSHs (sv_2mortal (newSViv (req->result)));
		502	break;
		503
		504	default:
		505	PUSHs (sv_2mortal (newSViv (req->result)));
		506	break;
177	}	507	}
178	break;
179		508
180	case REQ_OPEN:	509	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		510
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	511	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	512	call_sv (req->callback, G_VOID | G_EVAL);
188	SPAGAIN;	513	SPAGAIN;
189		514
190	fh = SvREFCNT_inc (POPs);	515	FREETMPS;
191		516	LEAVE;
192	PUSHMARK (SP);
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_GROUP:
198	if (req->data)
199	{
200	int i;
201	AV *av = (AV *)req->data;
202
203	EXTEND (SP, AvFILL (av) + 1);
204	for (i = 0; i <= AvFILL (av); ++i)
205	PUSHs (*av_fetch (av, i, 0));
206	}
207	break;
208
209	case REQ_SLEEP:
210	break;
211
212	default:
213	PUSHs (sv_2mortal (newSViv (req->result)));
214	break;
215	}	517	}
216		518
217
218	PUTBACK;
219	call_sv (req->callback, G_VOID | G_EVAL);
220	SPAGAIN;
221
222	if (SvTRUE (ERRSV))
223	{
224	req_free (req);
225	croak (0);
226	}
227
228	LEAVE;
229
230	errno = errorno;
231	}
232
233	static void req_free (aio_req req)
234	{
235	if (req->grp)	519	if (req->grp)
236	{	520	{
237	aio_req grp = req->grp;	521	aio_req grp = req->grp;
238		522
239	/* unlink request */	523	/* unlink request */
240	req->grp_next->grp_prev = req->grp_prev;	524	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
241	req->grp_prev->grp_next = req->grp_next;	525	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
242		526
243	if (grp->grp_next == grp && grp->fd)	527	if (grp->grp_first == req)
244	{	528	grp->grp_first = req->grp_next;
245	req_invoke (grp);	529
246	req_free (grp);	530	aio_grp_dec (grp);
247	}
248	}	531	}
249		532
		533	return !SvTRUE (ERRSV);
		534	}
		535
		536	static void req_free (aio_req req)
		537	{
250	if (req->self)	538	if (req->self)
251	{	539	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
254	}	542	}
255		543
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
261		545	SvREFCNT_dec (req->sv1);
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
270		548
271	if (req->type == REQ_READDIR && req->result >= 0)	549	if (req->flags & FLAG_PTR2_FREE)
272	free (req->data2ptr);	550	free (req->ptr2);
273		551
274	Safefree (req);	552	Safefree (req);
275	}	553	}
276		554
		555	static void req_cancel_subs (aio_req grp)
		556	{
		557	aio_req sub;
		558
		559	if (grp->type != REQ_GROUP)
		560	return;
		561
		562	SvREFCNT_dec (grp->sv2);
		563	grp->sv2 = 0;
		564
		565	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		566	req_cancel (sub);
		567	}
		568
277	static void req_cancel (aio_req req)	569	static void req_cancel (aio_req req)
278	{	570	{
279	req->cancelled = 1;	571	req->flags |= FLAG_CANCELLED;
280		572
281	if (req->type == REQ_GROUP)	573	req_cancel_subs (req);
		574	}
		575
		576	static void *aio_proc(void *arg);
		577
		578	static void start_thread (void)
		579	{
		580	worker *wrk = calloc (1, sizeof (worker));
		581
		582	if (!wrk)
		583	croak ("unable to allocate worker thread data");
		584
		585	LOCK (wrklock);
		586
		587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
282	{	588	{
283	aio_req sub;	589	wrk->prev = &wrk_first;
		590	wrk->next = wrk_first.next;
		591	wrk_first.next->prev = wrk;
		592	wrk_first.next = wrk;
		593	++started;
		594	}
		595	else
		596	free (wrk);
284		597
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	598	UNLOCK (wrklock);
286	req_cancel (sub);	599	}
		600
		601	static void maybe_start_thread ()
		602	{
		603	if (get_nthreads () >= wanted)
		604	return;
		605
		606	/* todo: maybe use idle here, but might be less exact */
		607	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		608	return;
		609
		610	start_thread ();
		611	}
		612
		613	static void req_send (aio_req req)
		614	{
		615	block_sig ();
		616
		617	++nreqs;
		618
		619	LOCK (reqlock);
		620	++nready;
		621	reqq_push (&req_queue, req);
		622	COND_SIGNAL (reqwait);
		623	UNLOCK (reqlock);
		624
		625	unblock_sig ();
		626
		627	maybe_start_thread ();
		628	}
		629
		630	static void end_thread (void)
		631	{
		632	aio_req req;
		633
		634	Newz (0, req, 1, aio_cb);
		635
		636	req->type = REQ_QUIT;
		637	req->pri = PRI_MAX + PRI_BIAS;
		638
		639	LOCK (reqlock);
		640	reqq_push (&req_queue, req);
		641	COND_SIGNAL (reqwait);
		642	UNLOCK (reqlock);
		643
		644	LOCK (wrklock);
		645	--started;
		646	UNLOCK (wrklock);
		647	}
		648
		649	static void set_max_idle (int nthreads)
		650	{
		651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		652	max_idle = nthreads <= 0 ? 1 : nthreads;
		653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		654	}
		655
		656	static void min_parallel (int nthreads)
		657	{
		658	if (wanted < nthreads)
		659	wanted = nthreads;
		660	}
		661
		662	static void max_parallel (int nthreads)
		663	{
		664	if (wanted > nthreads)
		665	wanted = nthreads;
		666
		667	while (started > wanted)
		668	end_thread ();
		669	}
		670
		671	static void poll_wait ()
		672	{
		673	fd_set rfd;
		674
		675	while (nreqs)
		676	{
		677	int size;
		678	if (WORDACCESS_UNSAFE) LOCK (reslock);
		679	size = res_queue.size;
		680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		681
		682	if (size)
		683	return;
		684
		685	maybe_start_thread ();
		686
		687	FD_ZERO(&rfd);
		688	FD_SET(respipe [0], &rfd);
		689
		690	select (respipe [0] + 1, &rfd, 0, 0, 0);
287	}	691	}
288	}	692	}
289		693
290	static int poll_cb ()	694	static int poll_cb ()
291	{	695	{
292	dSP;	696	dSP;
293	int count = 0;	697	int count = 0;
		698	int maxreqs = max_poll_reqs;
294	int do_croak = 0;	699	int do_croak = 0;
		700	struct timeval tv_start, tv_now;
295	aio_req req;	701	aio_req req;
		702
		703	if (max_poll_time)
		704	gettimeofday (&tv_start, 0);
		705
		706	block_sig ();
296		707
297	for (;;)	708	for (;;)
298	{	709	{
299	pthread_mutex_lock (&reslock);	710	for (;;)
300	req = ress;
301
302	if (req)
303	{	711	{
304	ress = req->next;	712	maybe_start_thread ();
305		713
		714	LOCK (reslock);
		715	req = reqq_shift (&res_queue);
		716
306	if (!ress)	717	if (req)
307	{	718	{
		719	--npending;
		720
		721	if (!res_queue.size)
		722	{
308	/* read any signals sent by the worker threads */	723	/* read any signals sent by the worker threads */
309	char buf [32];	724	char buf [4];
310	while (read (respipe [0], buf, 32) == 32)	725	while (read (respipe [0], buf, 4) == 4)
		726	;
311	;	727	}
		728	}
312		729
		730	UNLOCK (reslock);
		731
		732	if (!req)
		733	break;
		734
		735	--nreqs;
		736
		737	if (req->type == REQ_GROUP && req->size)
		738	{
		739	req->int1 = 1; /* mark request as delayed */
		740	continue;
		741	}
		742	else
		743	{
		744	if (!req_invoke (req))
		745	{
		746	req_free (req);
		747	unblock_sig ();
		748	croak (0);
		749	}
		750
		751	count++;
		752	}
		753
		754	req_free (req);
		755
		756	if (maxreqs && !--maxreqs)
		757	break;
		758
		759	if (max_poll_time)
		760	{
		761	gettimeofday (&tv_now, 0);
		762
		763	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
313	rese = 0;	764	break;
314	}	765	}
315	}	766	}
316		767
317	pthread_mutex_unlock (&reslock);	768	if (nreqs <= max_outstanding)
318
319	if (!req)
320	break;	769	break;
321		770
322	nreqs--;	771	poll_wait ();
323		772
324	if (req->type == REQ_QUIT)	773	++maxreqs;
325	started--;
326	else if (req->type == REQ_GROUP && req->grp_next != req)
327	{
328	req->fd = 1; /* mark request as delayed */
329	continue;
330	}
331	else
332	{
333	if (req->type == REQ_READ)
334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
335
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
337	SvREADONLY_off (req->data);
338
339	if (req->statdata)
340	{
341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
342	PL_laststatval = req->result;
343	PL_statcache = *(req->statdata);
344	}
345
346	req_invoke (req);
347
348	count++;
349	}
350
351	req_free (req);
352	}	774	}
353		775
		776	unblock_sig ();
354	return count;	777	return count;
355	}
356
357	static void *aio_proc(void *arg);
358
359	static void start_thread (void)
360	{
361	sigset_t fullsigset, oldsigset;
362	pthread_t tid;
363	pthread_attr_t attr;
364
365	pthread_attr_init (&attr);
366	pthread_attr_setstacksize (&attr, STACKSIZE);
367	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
368
369	sigfillset (&fullsigset);
370	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
371
372	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
373	started++;
374
375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
376	}
377
378	static void req_send (aio_req req)
379	{
380	while (started < wanted && nreqs >= started)
381	start_thread ();
382
383	nreqs++;
384
385	pthread_mutex_lock (&reqlock);
386
387	req->next = 0;
388
389	if (reqe)
390	{
391	reqe->next = req;
392	reqe = req;
393	}
394	else
395	reqe = reqs = req;
396
397	pthread_cond_signal (&reqwait);
398	pthread_mutex_unlock (&reqlock);
399
400	if (nreqs > max_outstanding)
401	for (;;)
402	{
403	poll_cb ();
404
405	if (nreqs <= max_outstanding)
406	break;
407
408	poll_wait ();
409	}
410	}
411
412	static void end_thread (void)
413	{
414	aio_req req;
415	Newz (0, req, 1, aio_cb);
416	req->type = REQ_QUIT;
417
418	req_send (req);
419	}
420
421	static void min_parallel (int nthreads)
422	{
423	if (wanted < nthreads)
424	wanted = nthreads;
425	}
426
427	static void max_parallel (int nthreads)
428	{
429	int cur = started;
430
431	if (wanted > nthreads)
432	wanted = nthreads;
433
434	while (cur > wanted)
435	{
436	end_thread ();
437	cur--;
438	}
439
440	while (started > wanted)
441	{
442	poll_wait ();
443	poll_cb ();
444	}
445	}	778	}
446		779
447	static void create_pipe ()	780	static void create_pipe ()
448	{	781	{
449	if (pipe (respipe))	782	if (pipe (respipe))
…		…
466	/*	799	/*
467	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
468	* normal read/write by using a mutex. slows down execution a lot,	801	* normal read/write by using a mutex. slows down execution a lot,
469	* but that's your problem, not mine.	802	* but that's your problem, not mine.
470	*/	803	*/
471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
472		805
473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
474	{	807	{
475	ssize_t res;	808	ssize_t res;
476	off_t ooffset;	809	off_t ooffset;
477		810
478	pthread_mutex_lock (&preadwritelock);	811	LOCK (preadwritelock);
479	ooffset = lseek (fd, 0, SEEK_CUR);	812	ooffset = lseek (fd, 0, SEEK_CUR);
480	lseek (fd, offset, SEEK_SET);	813	lseek (fd, offset, SEEK_SET);
481	res = read (fd, buf, count);	814	res = read (fd, buf, count);
482	lseek (fd, ooffset, SEEK_SET);	815	lseek (fd, ooffset, SEEK_SET);
483	pthread_mutex_unlock (&preadwritelock);	816	UNLOCK (preadwritelock);
484		817
485	return res;	818	return res;
486	}	819	}
487		820
488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
489	{	822	{
490	ssize_t res;	823	ssize_t res;
491	off_t ooffset;	824	off_t ooffset;
492		825
493	pthread_mutex_lock (&preadwritelock);	826	LOCK (preadwritelock);
494	ooffset = lseek (fd, 0, SEEK_CUR);	827	ooffset = lseek (fd, 0, SEEK_CUR);
495	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
496	res = write (fd, buf, count);	829	res = write (fd, buf, count);
497	lseek (fd, offset, SEEK_SET);	830	lseek (fd, offset, SEEK_SET);
498	pthread_mutex_unlock (&preadwritelock);	831	UNLOCK (preadwritelock);
499		832
500	return res;	833	return res;
501	}	834	}
502	#endif	835	#endif
503		836
504	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
505	# define fdatasync fsync	838	# define fdatasync fsync
506	#endif	839	#endif
507		840
508	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
509	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
510		843
511	static ssize_t readahead (int fd, off_t offset, size_t count)	844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
512	{	845	{
513	char readahead_buf[4096];	846	dBUF;
514		847
515	while (count > 0)	848	while (count > 0)
516	{	849	{
517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
518		851
519	pread (fd, readahead_buf, len, offset);	852	pread (fd, aio_buf, len, offset);
520	offset += len;	853	offset += len;
521	count -= len;	854	count -= len;
522	}	855	}
523		856
524	errno = 0;	857	errno = 0;
525	}	858	}
		859
526	#endif	860	#endif
527		861
528	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
529	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
530		864
531	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
532		866
533	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
534	{	868	{
535	struct dirent *e;	869	struct dirent *e;
536	int errorno;	870	int errorno;
537		871
538	pthread_mutex_lock (&readdirlock);	872	LOCK (readdirlock);
539		873
540	e = readdir (dirp);	874	e = readdir (dirp);
541	errorno = errno;	875	errorno = errno;
542		876
543	if (e)	877	if (e)
…		…
546	strcpy (ent->d_name, e->d_name);	880	strcpy (ent->d_name, e->d_name);
547	}	881	}
548	else	882	else
549	*res = 0;	883	*res = 0;
550		884
551	pthread_mutex_unlock (&readdirlock);	885	UNLOCK (readdirlock);
552		886
553	errno = errorno;	887	errno = errorno;
554	return e ? 0 : -1;	888	return e ? 0 : -1;
555	}	889	}
556	#endif	890	#endif
557		891
558	/* sendfile always needs emulation */	892	/* sendfile always needs emulation */
559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
560	{	894	{
561	ssize_t res;	895	ssize_t res;
562		896
563	if (!count)	897	if (!count)
564	return 0;	898	return 0;
…		…
575	{	909	{
576	off_t sbytes;	910	off_t sbytes;
577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
578		912
579	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
581	res = sbytes;	915	res = sbytes;
582	}	916	}
583		917
584	# elif __hpux	918	# elif __hpux
585	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
613	#endif	947	#endif
614	)	948	)
615	)	949	)
616	{	950	{
617	/* emulate sendfile. this is a major pain in the ass */	951	/* emulate sendfile. this is a major pain in the ass */
618	char buf[4096];	952	dBUF;
		953
619	res = 0;	954	res = 0;
620		955
621	while (count)	956	while (count)
622	{	957	{
623	ssize_t cnt;	958	ssize_t cnt;
624		959
625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
626		961
627	if (cnt <= 0)	962	if (cnt <= 0)
628	{	963	{
629	if (cnt && !res) res = -1;	964	if (cnt && !res) res = -1;
630	break;	965	break;
631	}	966	}
632		967
633	cnt = write (ofd, buf, cnt);	968	cnt = write (ofd, aio_buf, cnt);
634		969
635	if (cnt <= 0)	970	if (cnt <= 0)
636	{	971	{
637	if (cnt && !res) res = -1;	972	if (cnt && !res) res = -1;
638	break;	973	break;
…		…
646		981
647	return res;	982	return res;
648	}	983	}
649		984
650	/* read a full directory */	985	/* read a full directory */
651	static int scandir_ (const char *path, void **namesp)	986	static void scandir_ (aio_req req, worker *self)
652	{	987	{
653	DIR *dirp = opendir (path);	988	DIR *dirp;
654	union	989	union
655	{	990	{
656	struct dirent d;	991	struct dirent d;
657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
658	} u;	993	} *u;
659	struct dirent *entp;	994	struct dirent *entp;
660	char *name, *names;	995	char *name, *names;
661	int memlen = 4096;	996	int memlen = 4096;
662	int memofs = 0;	997	int memofs = 0;
663	int res = 0;	998	int res = 0;
664	int errorno;	999	int errorno;
665		1000
666	if (!dirp)	1001	LOCK (wrklock);
667	return -1;	1002	self->dirp = dirp = opendir (req->ptr1);
668		1003	self->dbuf = u = malloc (sizeof (*u));
		1004	req->flags |= FLAG_PTR2_FREE;
669	names = malloc (memlen);	1005	req->ptr2 = names = malloc (memlen);
		1006	UNLOCK (wrklock);
		1007
		1008	if (dirp && u && names)
		1009	for (;;)
		1010	{
		1011	errno = 0;
		1012	readdir_r (dirp, &u->d, &entp);
		1013
		1014	if (!entp)
		1015	break;
		1016
		1017	name = entp->d_name;
		1018
		1019	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1020	{
		1021	int len = strlen (name) + 1;
		1022
		1023	res++;
		1024
		1025	while (memofs + len > memlen)
		1026	{
		1027	memlen *= 2;
		1028	LOCK (wrklock);
		1029	req->ptr2 = names = realloc (names, memlen);
		1030	UNLOCK (wrklock);
		1031
		1032	if (!names)
		1033	break;
		1034	}
		1035
		1036	memcpy (names + memofs, name, len);
		1037	memofs += len;
		1038	}
		1039	}
		1040
		1041	if (errno)
		1042	res = -1;
		1043
		1044	req->result = res;
		1045	}
		1046
		1047	/*****************************************************************************/
		1048
		1049	static void *aio_proc (void *thr_arg)
		1050	{
		1051	aio_req req;
		1052	struct timespec ts;
		1053	worker *self = (worker *)thr_arg;
		1054
		1055	/* try to distribute timeouts somewhat evenly */
		1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1057	* (1000000000UL / 1024UL);
670		1058
671	for (;;)	1059	for (;;)
672	{	1060	{
673	errno = 0, readdir_r (dirp, &u.d, &entp);	1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
674		1062
675	if (!entp)	1063	LOCK (reqlock);
676	break;
677
678	name = entp->d_name;
679
680	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
681	{
682	int len = strlen (name) + 1;
683
684	res++;
685
686	while (memofs + len > memlen)
687	{
688	memlen *= 2;
689	names = realloc (names, memlen);
690	if (!names)
691	break;
692	}
693
694	memcpy (names + memofs, name, len);
695	memofs += len;
696	}
697	}
698
699	errorno = errno;
700	closedir (dirp);
701
702	if (errorno)
703	{
704	free (names);
705	errno = errorno;
706	res = -1;
707	}
708
709	*namesp = (void *)names;
710	return res;
711	}
712
713	/*****************************************************************************/
714
715	static void *aio_proc (void *thr_arg)
716	{
717	aio_req req;
718	int type;
719
720	do
721	{
722	pthread_mutex_lock (&reqlock);
723		1064
724	for (;;)	1065	for (;;)
725	{	1066	{
726	req = reqs;	1067	self->req = req = reqq_shift (&req_queue);
727
728	if (reqs)
729	{
730	reqs = reqs->next;
731	if (!reqs) reqe = 0;
732	}
733		1068
734	if (req)	1069	if (req)
735	break;	1070	break;
736		1071
737	pthread_cond_wait (&reqwait, &reqlock);	1072	++idle;
		1073
		1074	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1075	== ETIMEDOUT)
		1076	{
		1077	if (idle > max_idle)
		1078	{
		1079	--idle;
		1080	UNLOCK (reqlock);
		1081	LOCK (wrklock);
		1082	--started;
		1083	UNLOCK (wrklock);
		1084	goto quit;
		1085	}
		1086
		1087	/* we are allowed to idle, so do so without any timeout */
		1088	COND_WAIT (reqwait, reqlock);
		1089	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1090	}
		1091
		1092	--idle;
738	}	1093	}
739		1094
740	pthread_mutex_unlock (&reqlock);	1095	--nready;
		1096
		1097	UNLOCK (reqlock);
741		1098
742	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
743		1100
744	if (!req->cancelled)	1101	if (!(req->flags & FLAG_CANCELLED))
745	switch (req->type)	1102	switch (req->type)
746	{	1103	{
747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
749		1106
750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
751	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
752		1109
753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
756		1113
757	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
758	case REQ_CLOSE: req->result = close (req->fd); break;	1115	case REQ_CLOSE: req->result = close (req->int1); break;
759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
764		1124
765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
766	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
768		1128
769	case REQ_SLEEP:	1129	case REQ_BUSY:
770	{	1130	{
771	struct timeval tv;	1131	struct timeval tv;
772		1132
773	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
774	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
775		1135
776	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
777	}	1137	}
778		1138
		1139	case REQ_GROUP:
		1140	case REQ_NOP:
		1141	break;
		1142
779	case REQ_QUIT:	1143	case REQ_QUIT:
780	break;	1144	goto quit;
781		1145
782	default:	1146	default:
783	req->result = ENOSYS;	1147	req->result = ENOSYS;
784	break;	1148	break;
785	}	1149	}
786		1150
787	req->errorno = errno;	1151	req->errorno = errno;
788		1152
789	pthread_mutex_lock (&reslock);	1153	LOCK (reslock);
790		1154
791	req->next = 0;	1155	++npending;
792		1156
793	if (rese)	1157	if (!reqq_push (&res_queue, req))
794	{	1158	{
795	rese->next = req;
796	rese = req;
797	}
798	else
799	{
800	rese = ress = req;
801
802	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
803	write (respipe [1], &respipe, 1);	1160	write (respipe [1], &respipe, 1);
		1161
		1162	/* optionally signal the main thread asynchronously */
		1163	if (main_sig)
		1164	pthread_kill (main_tid, main_sig);
804	}	1165	}
805		1166
806	pthread_mutex_unlock (&reslock);	1167	self->req = 0;
		1168	worker_clear (self);
		1169
		1170	UNLOCK (reslock);
807	}	1171	}
808	while (type != REQ_QUIT);	1172
		1173	quit:
		1174	LOCK (wrklock);
		1175	worker_free (self);
		1176	UNLOCK (wrklock);
809		1177
810	return 0;	1178	return 0;
811	}	1179	}
812		1180
813	/*****************************************************************************/	1181	/*****************************************************************************/
814		1182
815	static void atfork_prepare (void)	1183	static void atfork_prepare (void)
816	{	1184	{
817	pthread_mutex_lock (&reqlock);	1185	LOCK (wrklock);
818	pthread_mutex_lock (&reslock);	1186	LOCK (reqlock);
		1187	LOCK (reslock);
819	#if !HAVE_PREADWRITE	1188	#if !HAVE_PREADWRITE
820	pthread_mutex_lock (&preadwritelock);	1189	LOCK (preadwritelock);
821	#endif	1190	#endif
822	#if !HAVE_READDIR_R	1191	#if !HAVE_READDIR_R
823	pthread_mutex_lock (&readdirlock);	1192	LOCK (readdirlock);
824	#endif	1193	#endif
825	}	1194	}
826		1195
827	static void atfork_parent (void)	1196	static void atfork_parent (void)
828	{	1197	{
829	#if !HAVE_READDIR_R	1198	#if !HAVE_READDIR_R
830	pthread_mutex_unlock (&readdirlock);	1199	UNLOCK (readdirlock);
831	#endif	1200	#endif
832	#if !HAVE_PREADWRITE	1201	#if !HAVE_PREADWRITE
833	pthread_mutex_unlock (&preadwritelock);	1202	UNLOCK (preadwritelock);
834	#endif	1203	#endif
835	pthread_mutex_unlock (&reslock);	1204	UNLOCK (reslock);
836	pthread_mutex_unlock (&reqlock);	1205	UNLOCK (reqlock);
		1206	UNLOCK (wrklock);
837	}	1207	}
838		1208
839	static void atfork_child (void)	1209	static void atfork_child (void)
840	{	1210	{
841	aio_req prv;	1211	aio_req prv;
842		1212
843	started = 0;	1213	while (prv = reqq_shift (&req_queue))
		1214	req_free (prv);
844		1215
845	while (reqs)	1216	while (prv = reqq_shift (&res_queue))
		1217	req_free (prv);
		1218
		1219	while (wrk_first.next != &wrk_first)
846	{	1220	{
847	prv = reqs;	1221	worker *wrk = wrk_first.next;
848	reqs = prv->next;	1222
		1223	if (wrk->req)
		1224	req_free (wrk->req);
		1225
		1226	worker_clear (wrk);
849	req_free (prv);	1227	worker_free (wrk);
850	}	1228	}
851		1229
852	reqs = reqe = 0;	1230	started = 0;
853		1231	idle = 0;
854	while (ress)	1232	nreqs = 0;
855	{	1233	nready = 0;
856	prv = ress;	1234	npending = 0;
857	ress = prv->next;
858	req_free (prv);
859	}
860
861	ress = rese = 0;
862		1235
863	close (respipe [0]);	1236	close (respipe [0]);
864	close (respipe [1]);	1237	close (respipe [1]);
865	create_pipe ();	1238	create_pipe ();
866		1239
867	atfork_parent ();	1240	atfork_parent ();
868	}	1241	}
869		1242
870	#define dREQ \	1243	#define dREQ \
871	aio_req req; \	1244	aio_req req; \
		1245	int req_pri = next_pri; \
		1246	next_pri = DEFAULT_PRI + PRI_BIAS; \
872	\	1247	\
873	if (SvOK (callback) && !SvROK (callback)) \	1248	if (SvOK (callback) && !SvROK (callback)) \
874	croak ("callback must be undef or of reference type"); \	1249	croak ("callback must be undef or of reference type"); \
875	\	1250	\
876	Newz (0, req, 1, aio_cb); \	1251	Newz (0, req, 1, aio_cb); \
877	if (!req) \	1252	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	1253	croak ("out of memory during aio_req allocation"); \
879	\	1254	\
880	req->callback = newSVsv (callback)	1255	req->callback = newSVsv (callback); \
		1256	req->pri = req_pri
881		1257
882	#define REQ_SEND \	1258	#define REQ_SEND \
883	req_send (req); \	1259	req_send (req); \
884	\	1260	\
885	if (GIMME_V != G_VOID) \	1261	if (GIMME_V != G_VOID) \
…		…
890	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
891		1267
892	BOOT:	1268	BOOT:
893	{	1269	{
894	HV *stash = gv_stashpv ("IO::AIO", 1);	1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
898		1279
899	create_pipe ();	1280	create_pipe ();
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
901	}	1282	}
902		1283
903	void	1284	void
904	min_parallel (nthreads)	1285	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
907		1289
908	void	1290	void
909	max_parallel (nthreads)	1291	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	1292	PROTOTYPE: $
		1293	CODE:
		1294	max_poll_time = nseconds * AIO_TICKS;
		1295
		1296	void
		1297	min_parallel (int nthreads)
		1298	PROTOTYPE: $
		1299
		1300	void
		1301	max_parallel (int nthreads)
		1302	PROTOTYPE: $
		1303
		1304	void
		1305	max_idle (int nthreads)
		1306	PROTOTYPE: $
		1307	CODE:
		1308	set_max_idle (nthreads);
912		1309
913	int	1310	int
914	max_outstanding (nreqs)	1311	max_outstanding (int maxreqs)
915	int nreqs	1312	PROTOTYPE: $
916	PROTOTYPE: $
917	CODE:	1313	CODE:
918	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
919	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
920		1318
921	void	1319	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
923	SV * pathname	1321	SV8 * pathname
924	int flags	1322	int flags
925	int mode	1323	int mode
926	SV * callback	1324	SV * callback
927	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
928	PPCODE:	1326	PPCODE:
929	{	1327	{
930	dREQ;	1328	dREQ;
931		1329
932	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
933	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	1333	req->int1 = flags;
936	req->mode = mode;	1334	req->mode = mode;
937		1335
938	REQ_SEND;	1336	REQ_SEND;
939	}	1337	}
940		1338
…		…
950	PPCODE:	1348	PPCODE:
951	{	1349	{
952	dREQ;	1350	dREQ;
953		1351
954	req->type = ix;	1352	req->type = ix;
955	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
957		1355
958	REQ_SEND (req);	1356	REQ_SEND (req);
959	}	1357	}
960		1358
961	void	1359	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
963	SV * fh	1361	SV * fh
964	UV offset	1362	UV offset
965	UV length	1363	UV length
966	SV * data	1364	SV8 * data
967	UV dataoffset	1365	UV dataoffset
968	SV * callback	1366	SV * callback
969	ALIAS:	1367	ALIAS:
970	aio_read = REQ_READ	1368	aio_read = REQ_READ
971	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
972	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
973	PPCODE:	1371	PPCODE:
974	{	1372	{
975	aio_req req;
976	STRLEN svlen;	1373	STRLEN svlen;
977	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
978		1375
979	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
992	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
993	}	1390	}
994	else	1391	else
995	{	1392	{
996	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
997	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
998	}	1395	}
999		1396
1000	if (length < 0)	1397	if (length < 0)
1001	croak ("length must not be negative");	1398	croak ("length must not be negative");
1002		1399
1003	{	1400	{
1004	dREQ;	1401	dREQ;
1005		1402
1006	req->type = ix;	1403	req->type = ix;
1007	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1009	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
1010	req->offset = offset;	1407	req->offs = offset;
1011	req->length = length;	1408	req->size = length;
1012	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
1014		1412
1015	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
1016	{	1414	{
1017	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
1019	}	1417	}
1020		1418
1021	REQ_SEND;	1419	REQ_SEND;
1022	}	1420	}
		1421	}
		1422
		1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		1428	PPCODE:
		1429	{
		1430	SV *data;
		1431	dREQ;
		1432
		1433	data = newSV (NAME_MAX);
		1434	SvPOK_on (data);
		1435
		1436	req->type = REQ_READLINK;
		1437	req->fh = newSVsv (path);
		1438	req->ptr2 = SvPVbyte_nolen (req->fh);
		1439	req->sv1 = data;
		1440	req->ptr1 = SvPVbyte_nolen (data);
		1441
		1442	REQ_SEND;
1023	}	1443	}
1024		1444
1025	void	1445	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1027	SV * out_fh	1447	SV * out_fh
…		…
1033	PPCODE:	1453	PPCODE:
1034	{	1454	{
1035	dREQ;	1455	dREQ;
1036		1456
1037	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
1038	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1040	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1042	req->offset = in_offset;	1462	req->offs = in_offset;
1043	req->length = length;	1463	req->size = length;
1044		1464
1045	REQ_SEND;	1465	REQ_SEND;
1046	}	1466	}
1047		1467
1048	void	1468	void
…		…
1055	PPCODE:	1475	PPCODE:
1056	{	1476	{
1057	dREQ;	1477	dREQ;
1058		1478
1059	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
1060	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1062	req->offset = offset;	1482	req->offs = offset;
1063	req->length = length;	1483	req->size = length;
1064		1484
1065	REQ_SEND;	1485	REQ_SEND;
1066	}	1486	}
1067		1487
1068	void	1488	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
1070	SV * fh_or_path	1490	SV8 * fh_or_path
1071	SV * callback	1491	SV * callback
1072	ALIAS:	1492	ALIAS:
1073	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
1074	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
1075	PPCODE:	1495	PPCODE:
1076	{	1496	{
1077	dREQ;	1497	dREQ;
1078		1498
1079	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
1080	if (!req->statdata)	1500	if (!req->ptr2)
1081	{	1501	{
1082	req_free (req);	1502	req_free (req);
1083	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
1084	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
1085		1507
1086	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
1087	{	1509	{
1088	req->type = ix;	1510	req->type = ix;
1089	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	1513	}
1092	else	1514	else
1093	{	1515	{
1094	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
1095	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	1519	}
1098		1520
1099	REQ_SEND;	1521	REQ_SEND;
1100	}	1522	}
1101		1523
1102	void	1524	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
1104	SV * pathname	1526	SV8 * pathname
1105	SV * callback	1527	SV * callback
1106	ALIAS:	1528	ALIAS:
1107	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
1108	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
1109	aio_readdir = REQ_READDIR	1531	aio_readdir = REQ_READDIR
1110	PPCODE:	1532	PPCODE:
1111	{	1533	{
1112	dREQ;	1534	dREQ;
1113		1535
1114	req->type = ix;	1536	req->type = ix;
1115	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	1538	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1539
		1540	REQ_SEND;
		1541	}
		1542
		1543	void
		1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
		1545	SV8 * pathname
		1546	UV mode
		1547	SV * callback
		1548	PPCODE:
		1549	{
		1550	dREQ;
1117		1551
		1552	req->type = REQ_MKDIR;
		1553	req->sv1 = newSVsv (pathname);
		1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1555	req->mode = mode;
		1556
1118	REQ_SEND;	1557	REQ_SEND;
1119	}	1558	}
1120		1559
1121	void	1560	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1123	SV * oldpath	1562	SV8 * oldpath
1124	SV * newpath	1563	SV8 * newpath
1125	SV * callback	1564	SV * callback
1126	ALIAS:	1565	ALIAS:
1127	aio_link = REQ_LINK	1566	aio_link = REQ_LINK
1128	aio_symlink = REQ_SYMLINK	1567	aio_symlink = REQ_SYMLINK
1129	aio_rename = REQ_RENAME	1568	aio_rename = REQ_RENAME
1130	PPCODE:	1569	PPCODE:
1131	{	1570	{
1132	dREQ;	1571	dREQ;
1133		1572
1134	req->type = ix;	1573	req->type = ix;
1135	req->fh = newSVsv (oldpath);	1574	req->fh = newSVsv (oldpath);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1137	req->data = newSVsv (newpath);	1576	req->sv1 = newSVsv (newpath);
1138	req->dataptr = SvPVbyte_nolen (req->data);	1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1139		1578
1140	REQ_SEND;	1579	REQ_SEND;
1141	}	1580	}
1142		1581
1143	void	1582	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1145	double delay	1584	SV8 * pathname
		1585	UV mode
		1586	UV dev
1146	SV * callback	1587	SV * callback
1147	PPCODE:	1588	PPCODE:
1148	{	1589	{
1149	dREQ;	1590	dREQ;
		1591
		1592	req->type = REQ_MKNOD;
		1593	req->sv1 = newSVsv (pathname);
		1594	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1595	req->mode = (mode_t)mode;
		1596	req->offs = dev;
		1597
		1598	REQ_SEND;
		1599	}
1150		1600
		1601	void
		1602	aio_busy (delay,callback=&PL_sv_undef)
		1603	double delay
		1604	SV * callback
		1605	PPCODE:
		1606	{
		1607	dREQ;
		1608
1151	req->type = REQ_SLEEP;	1609	req->type = REQ_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	1610	req->int1 = delay < 0. ? 0 : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1154		1612
1155	REQ_SEND;	1613	REQ_SEND;
1156	}	1614	}
1157		1615
1158	void	1616	void
…		…
1160	SV * callback	1618	SV * callback
1161	PROTOTYPE: ;$	1619	PROTOTYPE: ;$
1162	PPCODE:	1620	PPCODE:
1163	{	1621	{
1164	dREQ;	1622	dREQ;
		1623
1165	req->type = REQ_GROUP;	1624	req->type = REQ_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		1625
1169	req_send (req);	1626	req_send (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	1628	}
		1629
		1630	void
		1631	aio_nop (callback=&PL_sv_undef)
		1632	SV * callback
		1633	PPCODE:
		1634	{
		1635	dREQ;
		1636
		1637	req->type = REQ_NOP;
		1638
		1639	REQ_SEND;
		1640	}
		1641
		1642	int
		1643	aioreq_pri (int pri = 0)
		1644	PROTOTYPE: ;$
		1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
		1649	if (pri < PRI_MIN) pri = PRI_MIN;
		1650	if (pri > PRI_MAX) pri = PRI_MAX;
		1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	void
		1657	aioreq_nice (int nice = 0)
		1658	CODE:
		1659	nice = next_pri - nice;
		1660	if (nice < PRI_MIN) nice = PRI_MIN;
		1661	if (nice > PRI_MAX) nice = PRI_MAX;
		1662	next_pri = nice + PRI_BIAS;
1172		1663
1173	void	1664	void
1174	flush ()	1665	flush ()
1175	PROTOTYPE:	1666	PROTOTYPE:
1176	CODE:	1667	CODE:
…		…
1178	{	1669	{
1179	poll_wait ();	1670	poll_wait ();
1180	poll_cb ();	1671	poll_cb ();
1181	}	1672	}
1182		1673
1183	void	1674	int
1184	poll()	1675	poll()
1185	PROTOTYPE:	1676	PROTOTYPE:
1186	CODE:	1677	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	1678	poll_wait ();
1190	poll_cb ();	1679	RETVAL = poll_cb ();
1191	}	1680	OUTPUT:
		1681	RETVAL
1192		1682
1193	int	1683	int
1194	poll_fileno()	1684	poll_fileno()
1195	PROTOTYPE:	1685	PROTOTYPE:
1196	CODE:	1686	CODE:
…		…
1208		1698
1209	void	1699	void
1210	poll_wait()	1700	poll_wait()
1211	PROTOTYPE:	1701	PROTOTYPE:
1212	CODE:	1702	CODE:
1213	if (nreqs)
1214	poll_wait ();	1703	poll_wait ();
		1704
		1705	void
		1706	setsig (int signum = SIGIO)
		1707	PROTOTYPE: ;$
		1708	CODE:
		1709	{
		1710	if (block_sig_level)
		1711	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1712
		1713	LOCK (reslock);
		1714	main_tid = pthread_self ();
		1715	main_sig = signum;
		1716	UNLOCK (reslock);
		1717
		1718	if (main_sig && npending)
		1719	pthread_kill (main_tid, main_sig);
		1720	}
		1721
		1722	void
		1723	aio_block (SV *cb)
		1724	PROTOTYPE: &
		1725	PPCODE:
		1726	{
		1727	int count;
		1728
		1729	block_sig ();
		1730	PUSHMARK (SP);
		1731	PUTBACK;
		1732	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1733	SPAGAIN;
		1734	unblock_sig ();
		1735
		1736	if (SvTRUE (ERRSV))
		1737	croak (0);
		1738
		1739	XSRETURN (count);
		1740	}
1215		1741
1216	int	1742	int
1217	nreqs()	1743	nreqs()
1218	PROTOTYPE:	1744	PROTOTYPE:
1219	CODE:	1745	CODE:
1220	RETVAL = nreqs;	1746	RETVAL = nreqs;
1221	OUTPUT:	1747	OUTPUT:
1222	RETVAL	1748	RETVAL
1223		1749
1224	PROTOTYPES: DISABLE	1750	int
1225		1751	nready()
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227
1228	void
1229	cancel (aio_req_ornot req)
1230	PROTOTYPE:	1752	PROTOTYPE:
1231	CODE:	1753	CODE:
		1754	RETVAL = get_nready ();
		1755	OUTPUT:
		1756	RETVAL
		1757
		1758	int
		1759	npending()
		1760	PROTOTYPE:
		1761	CODE:
		1762	RETVAL = get_npending ();
		1763	OUTPUT:
		1764	RETVAL
		1765
		1766	int
		1767	nthreads()
		1768	PROTOTYPE:
		1769	CODE:
		1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1771	RETVAL = started;
		1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1773	OUTPUT:
		1774	RETVAL
		1775
		1776	PROTOTYPES: DISABLE
		1777
		1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1779
		1780	void
		1781	cancel (aio_req_ornot req)
		1782	CODE:
1232	req_cancel (req);	1783	req_cancel (req);
		1784
		1785	void
		1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1787	CODE:
		1788	SvREFCNT_dec (req->callback);
		1789	req->callback = newSVsv (callback);
1233		1790
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1791	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1792
1236	void	1793	void
1237	add (aio_req grp, ...)	1794	add (aio_req grp, ...)
1238	PPCODE:	1795	PPCODE:
1239	{	1796	{
1240	int i;	1797	int i;
		1798	aio_req req;
		1799
		1800	if (main_sig && !block_sig_level)
		1801	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1802
		1803	if (grp->int1 == 2)
		1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1241		1805
1242	for (i = 1; i < items; ++i )	1806	for (i = 1; i < items; ++i )
1243	{	1807	{
1244	if (GIMME_V != G_VOID)	1808	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1809	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1810
1247	aio_req req = SvAIO_REQ (ST (i));	1811	req = SvAIO_REQ (ST (i));
1248		1812
1249	if (req)	1813	if (req)
1250	{	1814	{
1251	req->grp_prev = grp;	1815	++grp->size;
1252	req->grp_next = grp->grp_next;
1253	grp->grp_next->grp_prev = req;
1254	grp->grp_next = req;
1255
1256	req->grp = grp;	1816	req->grp = grp;
		1817
		1818	req->grp_prev = 0;
		1819	req->grp_next = grp->grp_first;
		1820
		1821	if (grp->grp_first)
		1822	grp->grp_first->grp_prev = req;
		1823
		1824	grp->grp_first = req;
1257	}	1825	}
1258	}	1826	}
1259	}	1827	}
1260		1828
1261	void	1829	void
		1830	cancel_subs (aio_req_ornot req)
		1831	CODE:
		1832	req_cancel_subs (req);
		1833
		1834	void
1262	result (aio_req grp, ...)	1835	result (aio_req grp, ...)
		1836	CODE:
		1837	{
		1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
		1843	av = newAV ();
		1844
		1845	for (i = 1; i < items; ++i )
		1846	av_push (av, newSVsv (ST (i)));
		1847
		1848	SvREFCNT_dec (grp->sv1);
		1849	grp->sv1 = (SV *)av;
		1850	}
		1851
		1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
		1856
		1857	void
		1858	limit (aio_req grp, int limit)
1263	CODE:	1859	CODE:
1264	{	1860	grp->int2 = limit;
1265	int i;	1861	aio_grp_feed (grp);
1266	AV *av = newAV ();
1267		1862
1268	if (grp->data)	1863	void
		1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1865	CODE:
		1866	{
1269	SvREFCNT_dec (grp->data);	1867	SvREFCNT_dec (grp->sv2);
		1868	grp->sv2 = newSVsv (callback);
1270		1869
1271	for (i = 1; i < items; ++i )	1870	if (grp->int2 <= 0)
1272	av_push (av, newSVsv (ST (i)));	1871	grp->int2 = 2;
1273		1872
1274	grp->data = (SV *)av;	1873	aio_grp_feed (grp);
1275	}	1874	}
1276		1875

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