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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.63 by root, Mon Oct 23 23:48:31 2006 UTC vs.
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC

1	#if __linux	1	#include "xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "autoconf/config.h"
14		10
15	#include <pthread.h>
16
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>	14	#include <sys/time.h>
20	#include <sys/select.h>	15	#include <sys/select.h>
21	#include <sys/types.h>	16	#include <sys/types.h>
22	#include <sys/stat.h>	17	#include <sys/stat.h>
…		…
39	# else	34	# else
40	# error sendfile support requested but not available	35	# error sendfile support requested but not available
41	# endif	36	# endif
42	#endif	37	#endif
43		38
		39	/* number of seconds after which idle threads exit */
		40	#define IDLE_TIMEOUT 10
		41
44	/* used for struct dirent, AIX doesn't provide it */	42	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	43	#ifndef NAME_MAX
46	# define NAME_MAX 4096	44	# define NAME_MAX 4096
47	#endif	45	#endif
48		46
49	#if __ia64	47	/* buffer size for various temporary buffers */
50	# define STACKSIZE 65536	48	#define AIO_BUFSIZE 65536
51	#else	49
52	# define STACKSIZE 8192	50	#define dBUF \
53	#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 */
54		59
55	enum {	60	enum {
56	REQ_QUIT,	61	REQ_QUIT,
57	REQ_OPEN, REQ_CLOSE,	62	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,	64	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,	66	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
63	REQ_READDIR,	68	REQ_MKNOD, REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,	69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
65	REQ_GROUP, REQ_NOP,	70	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,	71	REQ_BUSY,
67	};	72	};
68		73
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	74	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	75	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		76
72	typedef struct aio_cb	77	typedef struct aio_cb
73	{	78	{
74	struct aio_cb *volatile next;	79	struct aio_cb *volatile next;
75		80
76	SV *data, *callback;	81	SV *callback, *fh;
77	SV *fh, *fh2;	82	SV *sv1, *sv2;
78	void *dataptr, *data2ptr;	83	void *ptr1, *ptr2;
79	Stat_t *statdata;
80	off_t offset;	84	off_t offs;
81	size_t length;	85	size_t size;
82	ssize_t result;	86	ssize_t result;
83		87
84	STRLEN dataoffset;	88	STRLEN stroffset;
85	int type;	89	int type;
86	int fd, fd2;	90	int int1, int2;
87	int errorno;	91	int errorno;
88	mode_t mode; /* open */	92	mode_t mode; /* open */
89		93
90	unsigned char flags;	94	unsigned char flags;
91	unsigned char pri;	95	unsigned char pri;
…		…
93	SV *self; /* the perl counterpart of this request, if any */	97	SV *self; /* the perl counterpart of this request, if any */
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
95	} aio_cb;	99	} aio_cb;
96		100
97	enum {	101	enum {
98	FLAG_CANCELLED = 0x01,	102	FLAG_CANCELLED = 0x01, /* request was cancelled */
		103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
99	};	105	};
100		106
101	typedef aio_cb *aio_req;	107	typedef aio_cb *aio_req;
102	typedef aio_cb *aio_req_ornot;	108	typedef aio_cb *aio_req_ornot;
103		109
…		…
105	PRI_MIN = -4,	111	PRI_MIN = -4,
106	PRI_MAX = 4,	112	PRI_MAX = 4,
107		113
108	DEFAULT_PRI = 0,	114	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,	115	PRI_BIAS = -PRI_MIN,
		116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
110	};	117	};
111		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
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;	165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113		166
114	static int started, wanted;	167	static unsigned int started, idle, wanted;
115	static volatile int nreqs;	168
116	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;
117	static int respipe [2];	212	static int respipe [2];
118		213
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	214	static mutex_t reslock = MUTEX_INIT;
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	215	static mutex_t reqlock = MUTEX_INIT;
		216	static cond_t reqwait = COND_INIT;
		217
		218	#if WORDACCESS_UNSAFE
		219
		220	static unsigned int get_nready ()
		221	{
		222	unsigned int retval;
		223
		224	LOCK (reqlock);
		225	retval = nready;
		226	UNLOCK (reqlock);
		227
		228	return retval;
		229	}
		230
		231	static unsigned int get_npending ()
		232	{
		233	unsigned int retval;
		234
		235	LOCK (reslock);
		236	retval = npending;
		237	UNLOCK (reslock);
		238
		239	return retval;
		240	}
		241
		242	static unsigned int get_nthreads ()
		243	{
		244	unsigned int retval;
		245
		246	LOCK (wrklock);
		247	retval = started;
		248	UNLOCK (wrklock);
		249
		250	return retval;
		251	}
		252
121	#else	253	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	254
		255	# define get_nready() nready
		256	# define get_npending() npending
		257	# define get_nthreads() started
		258
123	#endif	259	#endif
124		260
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	261	/*
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	262	* a somewhat faster data structure might be nice, but
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	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;
128		270
129	static volatile aio_req reqs, reqe; /* queue start, queue end */	271	static reqq req_queue;
130	static volatile aio_req ress, rese; /* queue start, queue end */	272	static reqq res_queue;
131		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 ();
132	static void req_invoke (aio_req req);	316	static int req_invoke (aio_req req);
133	static void req_free (aio_req req);	317	static void req_free (aio_req req);
		318	static void req_cancel (aio_req req);
134		319
135	/* must be called at most once */	320	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	321	static SV *req_sv (aio_req req, const char *klass)
137	{	322	{
138	if (!req->self)	323	if (!req->self)
…		…
156	return mg ? (aio_req)mg->mg_ptr : 0;	341	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	342	}
158		343
159	static void aio_grp_feed (aio_req grp)	344	static void aio_grp_feed (aio_req grp)
160	{	345	{
		346	block_sig ();
		347
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
162	{	349	{
163	int old_len = grp->length;	350	int old_len = grp->size;
164		351
165	if (grp->fh2 && SvOK (grp->fh2))	352	if (grp->sv2 && SvOK (grp->sv2))
166	{	353	{
167	dSP;	354	dSP;
168		355
169	ENTER;	356	ENTER;
170	SAVETMPS;	357	SAVETMPS;
171	PUSHMARK (SP);	358	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;	360	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);	361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
175	SPAGAIN;	362	SPAGAIN;
176	FREETMPS;	363	FREETMPS;
177	LEAVE;	364	LEAVE;
178	}	365	}
179		366
180	/* stop if no progress has been made */	367	/* stop if no progress has been made */
181	if (old_len == grp->length)	368	if (old_len == grp->size)
182	{	369	{
183	SvREFCNT_dec (grp->fh2);	370	SvREFCNT_dec (grp->sv2);
184	grp->fh2 = 0;	371	grp->sv2 = 0;
185	break;	372	break;
186	}	373	}
187	}	374	}
		375
		376	unblock_sig ();
188	}	377	}
189		378
190	static void aio_grp_dec (aio_req grp)	379	static void aio_grp_dec (aio_req grp)
191	{	380	{
192	--grp->length;	381	--grp->size;
193		382
194	/* call feeder, if applicable */	383	/* call feeder, if applicable */
195	aio_grp_feed (grp);	384	aio_grp_feed (grp);
196		385
197	/* finish, if done */	386	/* finish, if done */
198	if (!grp->length && grp->fd)	387	if (!grp->size && grp->int1)
199	{	388	{
		389	block_sig ();
		390
200	req_invoke (grp);	391	if (!req_invoke (grp))
		392	{
		393	req_free (grp);
		394	unblock_sig ();
		395	croak (0);
		396	}
		397
201	req_free (grp);	398	req_free (grp);
		399	unblock_sig ();
202	}	400	}
203	}	401	}
204		402
205	static void poll_wait ()	403	static int req_invoke (aio_req req)
206	{	404	{
207	fd_set rfd;	405	dSP;
208		406
209	while (nreqs)	407	if (req->flags & FLAG_SV1_RO_OFF)
		408	SvREADONLY_off (req->sv1);
		409
		410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
210	{	411	{
211	aio_req req;	412	ENTER;
212	pthread_mutex_lock (&reslock);	413	SAVETMPS;
213	req = ress;	414	PUSHMARK (SP);
214	pthread_mutex_unlock (&reslock);	415	EXTEND (SP, 1);
215		416
216	if (req)	417	switch (req->type)
217	return;	418	{
		419	case REQ_READDIR:
		420	{
		421	SV *rv = &PL_sv_undef;
218		422
219	FD_ZERO(&rfd);	423	if (req->result >= 0)
220	FD_SET(respipe [0], &rfd);	424	{
		425	int i;
		426	char *buf = req->ptr2;
		427	AV *av = newAV ();
221		428
222	select (respipe [0] + 1, &rfd, 0, 0, 0);	429	av_extend (av, req->result - 1);
		430
		431	for (i = 0; i < req->result; ++i)
		432	{
		433	SV *sv = newSVpv (buf, 0);
		434
		435	av_store (av, i, sv);
		436	buf += SvCUR (sv) + 1;
		437	}
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)av));
		440	}
		441
		442	PUSHs (rv);
		443	}
		444	break;
		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);
		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;
		507	}
		508
		509	errno = req->errorno;
		510
		511	PUTBACK;
		512	call_sv (req->callback, G_VOID | G_EVAL);
		513	SPAGAIN;
		514
		515	FREETMPS;
		516	LEAVE;
223	}	517	}
224	}
225		518
226	static void req_invoke (aio_req req)
227	{
228	dSP;
229	int errorno = errno;
230
231	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
232	return;
233
234	errno = req->errorno;
235
236	ENTER;
237	SAVETMPS;
238	PUSHMARK (SP);
239	EXTEND (SP, 1);
240
241	switch (req->type)
242	{
243	case REQ_READDIR:
244	{
245	SV *rv = &PL_sv_undef;
246
247	if (req->result >= 0)
248	{
249	char *buf = req->data2ptr;
250	AV *av = newAV ();
251
252	while (req->result)
253	{
254	SV *sv = newSVpv (buf, 0);
255
256	av_push (av, sv);
257	buf += SvCUR (sv) + 1;
258	req->result--;
259	}
260
261	rv = sv_2mortal (newRV_noinc ((SV *)av));
262	}
263
264	PUSHs (rv);
265	}
266	break;
267
268	case REQ_OPEN:
269	{
270	/* convert fd to fh */
271	SV *fh;
272
273	PUSHs (sv_2mortal (newSViv (req->result)));
274	PUTBACK;
275	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
276	SPAGAIN;
277
278	fh = SvREFCNT_inc (POPs);
279
280	PUSHMARK (SP);
281	XPUSHs (sv_2mortal (fh));
282	}
283	break;
284
285	case REQ_GROUP:
286	req->fd = 2; /* mark group as finished */
287
288	if (req->data)
289	{
290	int i;
291	AV *av = (AV *)req->data;
292
293	EXTEND (SP, AvFILL (av) + 1);
294	for (i = 0; i <= AvFILL (av); ++i)
295	PUSHs (*av_fetch (av, i, 0));
296	}
297	break;
298
299	case REQ_NOP:
300	case REQ_SLEEP:
301	break;
302
303	default:
304	PUSHs (sv_2mortal (newSViv (req->result)));
305	break;
306	}
307
308
309	PUTBACK;
310	call_sv (req->callback, G_VOID | G_EVAL);
311	SPAGAIN;
312
313	FREETMPS;
314	LEAVE;
315
316	errno = errorno;
317
318	if (SvTRUE (ERRSV))
319	{
320	req_free (req);
321	croak (0);
322	}
323	}
324
325	static void req_free (aio_req req)
326	{
327	if (req->grp)	519	if (req->grp)
328	{	520	{
329	aio_req grp = req->grp;	521	aio_req grp = req->grp;
330		522
331	/* unlink request */	523	/* unlink request */
…		…
336	grp->grp_first = req->grp_next;	528	grp->grp_first = req->grp_next;
337		529
338	aio_grp_dec (grp);	530	aio_grp_dec (grp);
339	}	531	}
340		532
		533	return !SvTRUE (ERRSV);
		534	}
		535
		536	static void req_free (aio_req req)
		537	{
341	if (req->self)	538	if (req->self)
342	{	539	{
343	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
344	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
345	}	542	}
346		543
347	SvREFCNT_dec (req->data);
348	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
		545	SvREFCNT_dec (req->sv1);
349	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
350	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
351	Safefree (req->statdata);
352		548
353	if (req->type == REQ_READDIR && req->result >= 0)	549	if (req->flags & FLAG_PTR2_FREE)
354	free (req->data2ptr);	550	free (req->ptr2);
355		551
356	Safefree (req);	552	Safefree (req);
357	}	553	}
358		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
359	static void req_cancel (aio_req req)	569	static void req_cancel (aio_req req)
360	{	570	{
361	req->flags |= FLAG_CANCELLED;	571	req->flags |= FLAG_CANCELLED;
362		572
363	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))
364	{	588	{
365	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);
366		597
367	for (sub = req->grp_first; sub; sub = sub->grp_next)	598	UNLOCK (wrklock);
368	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);
369	}	691	}
370	}	692	}
371		693
372	static int poll_cb ()	694	static int poll_cb ()
373	{	695	{
374	dSP;	696	dSP;
375	int count = 0;	697	int count = 0;
		698	int maxreqs = max_poll_reqs;
376	int do_croak = 0;	699	int do_croak = 0;
		700	struct timeval tv_start, tv_now;
377	aio_req req;	701	aio_req req;
		702
		703	if (max_poll_time)
		704	gettimeofday (&tv_start, 0);
		705
		706	block_sig ();
378		707
379	for (;;)	708	for (;;)
380	{	709	{
381	pthread_mutex_lock (&reslock);	710	for (;;)
382	req = ress;
383
384	if (req)
385	{	711	{
386	ress = req->next;	712	maybe_start_thread ();
387		713
		714	LOCK (reslock);
		715	req = reqq_shift (&res_queue);
		716
388	if (!ress)	717	if (req)
389	{	718	{
		719	--npending;
		720
		721	if (!res_queue.size)
		722	{
390	/* read any signals sent by the worker threads */	723	/* read any signals sent by the worker threads */
391	char buf [32];	724	char buf [4];
392	while (read (respipe [0], buf, 32) == 32)	725	while (read (respipe [0], buf, 4) == 4)
		726	;
393	;	727	}
		728	}
394		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)
395	rese = 0;	764	break;
396	}	765	}
397	}	766	}
398		767
399	pthread_mutex_unlock (&reslock);	768	if (nreqs <= max_outstanding)
400
401	if (!req)
402	break;	769	break;
403		770
404	--nreqs;	771	poll_wait ();
405		772
406	if (req->type == REQ_QUIT)	773	++maxreqs;
407	started--;
408	else if (req->type == REQ_GROUP && req->length)
409	{
410	req->fd = 1; /* mark request as delayed */
411	continue;
412	}
413	else
414	{
415	if (req->type == REQ_READ)
416	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
417
418	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
419	SvREADONLY_off (req->data);
420
421	if (req->statdata)
422	{
423	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
424	PL_laststatval = req->result;
425	PL_statcache = *(req->statdata);
426	}
427
428	req_invoke (req);
429
430	count++;
431	}
432
433	req_free (req);
434	}	774	}
435		775
		776	unblock_sig ();
436	return count;	777	return count;
437	}
438
439	static void *aio_proc(void *arg);
440
441	static void start_thread (void)
442	{
443	sigset_t fullsigset, oldsigset;
444	pthread_t tid;
445	pthread_attr_t attr;
446
447	pthread_attr_init (&attr);
448	pthread_attr_setstacksize (&attr, STACKSIZE);
449	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
450
451	sigfillset (&fullsigset);
452	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
453
454	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
455	started++;
456
457	sigprocmask (SIG_SETMASK, &oldsigset, 0);
458	}
459
460	static void req_send (aio_req req)
461	{
462	while (started < wanted && nreqs >= started)
463	start_thread ();
464
465	++nreqs;
466
467	pthread_mutex_lock (&reqlock);
468
469	req->next = 0;
470
471	if (reqe)
472	{
473	reqe->next = req;
474	reqe = req;
475	}
476	else
477	reqe = reqs = req;
478
479	pthread_cond_signal (&reqwait);
480	pthread_mutex_unlock (&reqlock);
481
482	if (nreqs > max_outstanding)
483	for (;;)
484	{
485	poll_cb ();
486
487	if (nreqs <= max_outstanding)
488	break;
489
490	poll_wait ();
491	}
492	}
493
494	static void end_thread (void)
495	{
496	aio_req req;
497	Newz (0, req, 1, aio_cb);
498	req->type = REQ_QUIT;
499
500	req_send (req);
501	}
502
503	static void min_parallel (int nthreads)
504	{
505	if (wanted < nthreads)
506	wanted = nthreads;
507	}
508
509	static void max_parallel (int nthreads)
510	{
511	int cur = started;
512
513	if (wanted > nthreads)
514	wanted = nthreads;
515
516	while (cur > wanted)
517	{
518	end_thread ();
519	cur--;
520	}
521
522	while (started > wanted)
523	{
524	poll_wait ();
525	poll_cb ();
526	}
527	}	778	}
528		779
529	static void create_pipe ()	780	static void create_pipe ()
530	{	781	{
531	if (pipe (respipe))	782	if (pipe (respipe))
…		…
548	/*	799	/*
549	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
550	* 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,
551	* but that's your problem, not mine.	802	* but that's your problem, not mine.
552	*/	803	*/
553	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
554		805
555	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)
556	{	807	{
557	ssize_t res;	808	ssize_t res;
558	off_t ooffset;	809	off_t ooffset;
559		810
560	pthread_mutex_lock (&preadwritelock);	811	LOCK (preadwritelock);
561	ooffset = lseek (fd, 0, SEEK_CUR);	812	ooffset = lseek (fd, 0, SEEK_CUR);
562	lseek (fd, offset, SEEK_SET);	813	lseek (fd, offset, SEEK_SET);
563	res = read (fd, buf, count);	814	res = read (fd, buf, count);
564	lseek (fd, ooffset, SEEK_SET);	815	lseek (fd, ooffset, SEEK_SET);
565	pthread_mutex_unlock (&preadwritelock);	816	UNLOCK (preadwritelock);
566		817
567	return res;	818	return res;
568	}	819	}
569		820
570	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)
571	{	822	{
572	ssize_t res;	823	ssize_t res;
573	off_t ooffset;	824	off_t ooffset;
574		825
575	pthread_mutex_lock (&preadwritelock);	826	LOCK (preadwritelock);
576	ooffset = lseek (fd, 0, SEEK_CUR);	827	ooffset = lseek (fd, 0, SEEK_CUR);
577	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
578	res = write (fd, buf, count);	829	res = write (fd, buf, count);
579	lseek (fd, offset, SEEK_SET);	830	lseek (fd, offset, SEEK_SET);
580	pthread_mutex_unlock (&preadwritelock);	831	UNLOCK (preadwritelock);
581		832
582	return res;	833	return res;
583	}	834	}
584	#endif	835	#endif
585		836
586	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
587	# define fdatasync fsync	838	# define fdatasync fsync
588	#endif	839	#endif
589		840
590	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
591	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
592		843
593	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)
594	{	845	{
595	char readahead_buf[4096];	846	dBUF;
596		847
597	while (count > 0)	848	while (count > 0)
598	{	849	{
599	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
600		851
601	pread (fd, readahead_buf, len, offset);	852	pread (fd, aio_buf, len, offset);
602	offset += len;	853	offset += len;
603	count -= len;	854	count -= len;
604	}	855	}
605		856
606	errno = 0;	857	errno = 0;
607	}	858	}
		859
608	#endif	860	#endif
609		861
610	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
611	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
612		864
613	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
614		866
615	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)
616	{	868	{
617	struct dirent *e;	869	struct dirent *e;
618	int errorno;	870	int errorno;
619		871
620	pthread_mutex_lock (&readdirlock);	872	LOCK (readdirlock);
621		873
622	e = readdir (dirp);	874	e = readdir (dirp);
623	errorno = errno;	875	errorno = errno;
624		876
625	if (e)	877	if (e)
…		…
628	strcpy (ent->d_name, e->d_name);	880	strcpy (ent->d_name, e->d_name);
629	}	881	}
630	else	882	else
631	*res = 0;	883	*res = 0;
632		884
633	pthread_mutex_unlock (&readdirlock);	885	UNLOCK (readdirlock);
634		886
635	errno = errorno;	887	errno = errorno;
636	return e ? 0 : -1;	888	return e ? 0 : -1;
637	}	889	}
638	#endif	890	#endif
639		891
640	/* sendfile always needs emulation */	892	/* sendfile always needs emulation */
641	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)
642	{	894	{
643	ssize_t res;	895	ssize_t res;
644		896
645	if (!count)	897	if (!count)
646	return 0;	898	return 0;
…		…
657	{	909	{
658	off_t sbytes;	910	off_t sbytes;
659	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
660		912
661	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
662	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
663	res = sbytes;	915	res = sbytes;
664	}	916	}
665		917
666	# elif __hpux	918	# elif __hpux
667	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
695	#endif	947	#endif
696	)	948	)
697	)	949	)
698	{	950	{
699	/* emulate sendfile. this is a major pain in the ass */	951	/* emulate sendfile. this is a major pain in the ass */
700	char buf[4096];	952	dBUF;
		953
701	res = 0;	954	res = 0;
702		955
703	while (count)	956	while (count)
704	{	957	{
705	ssize_t cnt;	958	ssize_t cnt;
706		959
707	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
708		961
709	if (cnt <= 0)	962	if (cnt <= 0)
710	{	963	{
711	if (cnt && !res) res = -1;	964	if (cnt && !res) res = -1;
712	break;	965	break;
713	}	966	}
714		967
715	cnt = write (ofd, buf, cnt);	968	cnt = write (ofd, aio_buf, cnt);
716		969
717	if (cnt <= 0)	970	if (cnt <= 0)
718	{	971	{
719	if (cnt && !res) res = -1;	972	if (cnt && !res) res = -1;
720	break;	973	break;
…		…
728		981
729	return res;	982	return res;
730	}	983	}
731		984
732	/* read a full directory */	985	/* read a full directory */
733	static int scandir_ (const char *path, void **namesp)	986	static void scandir_ (aio_req req, worker *self)
734	{	987	{
735	DIR *dirp = opendir (path);	988	DIR *dirp;
736	union	989	union
737	{	990	{
738	struct dirent d;	991	struct dirent d;
739	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
740	} u;	993	} *u;
741	struct dirent *entp;	994	struct dirent *entp;
742	char *name, *names;	995	char *name, *names;
743	int memlen = 4096;	996	int memlen = 4096;
744	int memofs = 0;	997	int memofs = 0;
745	int res = 0;	998	int res = 0;
746	int errorno;	999	int errorno;
747		1000
748	if (!dirp)	1001	LOCK (wrklock);
749	return -1;	1002	self->dirp = dirp = opendir (req->ptr1);
750		1003	self->dbuf = u = malloc (sizeof (*u));
		1004	req->flags |= FLAG_PTR2_FREE;
751	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);
752		1058
753	for (;;)	1059	for (;;)
754	{	1060	{
755	errno = 0, readdir_r (dirp, &u.d, &entp);	1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
756		1062
757	if (!entp)	1063	LOCK (reqlock);
758	break;
759
760	name = entp->d_name;
761
762	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
763	{
764	int len = strlen (name) + 1;
765
766	res++;
767
768	while (memofs + len > memlen)
769	{
770	memlen *= 2;
771	names = realloc (names, memlen);
772	if (!names)
773	break;
774	}
775
776	memcpy (names + memofs, name, len);
777	memofs += len;
778	}
779	}
780
781	errorno = errno;
782	closedir (dirp);
783
784	if (errorno)
785	{
786	free (names);
787	errno = errorno;
788	res = -1;
789	}
790
791	*namesp = (void *)names;
792	return res;
793	}
794
795	/*****************************************************************************/
796
797	static void *aio_proc (void *thr_arg)
798	{
799	aio_req req;
800	int type;
801
802	do
803	{
804	pthread_mutex_lock (&reqlock);
805		1064
806	for (;;)	1065	for (;;)
807	{	1066	{
808	req = reqs;	1067	self->req = req = reqq_shift (&req_queue);
809
810	if (reqs)
811	{
812	reqs = reqs->next;
813	if (!reqs) reqe = 0;
814	}
815		1068
816	if (req)	1069	if (req)
817	break;	1070	break;
818		1071
819	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;
820	}	1093	}
821		1094
822	pthread_mutex_unlock (&reqlock);	1095	--nready;
		1096
		1097	UNLOCK (reqlock);
823		1098
824	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
825	type = req->type; /* remember type for QUIT check */
826		1100
827	if (!(req->flags & FLAG_CANCELLED))	1101	if (!(req->flags & FLAG_CANCELLED))
828	switch (type)	1102	switch (req->type)
829	{	1103	{
830	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;
831	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;
832		1106
833	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;
834	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;
835		1109
836	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;
837	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;
838	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;
839		1113
840	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;
841	case REQ_CLOSE: req->result = close (req->fd); break;	1115	case REQ_CLOSE: req->result = close (req->int1); break;
842	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
843	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;
844	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
845	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
846	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;
847		1124
848	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
849	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
850	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
851		1128
852	case REQ_SLEEP:	1129	case REQ_BUSY:
853	{	1130	{
854	struct timeval tv;	1131	struct timeval tv;
855		1132
856	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
857	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
858		1135
859	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
860	}	1137	}
861		1138
862	case REQ_GROUP:	1139	case REQ_GROUP:
863	case REQ_NOP:	1140	case REQ_NOP:
		1141	break;
		1142
864	case REQ_QUIT:	1143	case REQ_QUIT:
865	break;	1144	goto quit;
866		1145
867	default:	1146	default:
868	req->result = ENOSYS;	1147	req->result = ENOSYS;
869	break;	1148	break;
870	}	1149	}
871		1150
872	req->errorno = errno;	1151	req->errorno = errno;
873		1152
874	pthread_mutex_lock (&reslock);	1153	LOCK (reslock);
875		1154
876	req->next = 0;	1155	++npending;
877		1156
878	if (rese)	1157	if (!reqq_push (&res_queue, req))
879	{	1158	{
880	rese->next = req;
881	rese = req;
882	}
883	else
884	{
885	rese = ress = req;
886
887	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
888	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);
889	}	1165	}
890		1166
891	pthread_mutex_unlock (&reslock);	1167	self->req = 0;
		1168	worker_clear (self);
		1169
		1170	UNLOCK (reslock);
892	}	1171	}
893	while (type != REQ_QUIT);	1172
		1173	quit:
		1174	LOCK (wrklock);
		1175	worker_free (self);
		1176	UNLOCK (wrklock);
894		1177
895	return 0;	1178	return 0;
896	}	1179	}
897		1180
898	/*****************************************************************************/	1181	/*****************************************************************************/
899		1182
900	static void atfork_prepare (void)	1183	static void atfork_prepare (void)
901	{	1184	{
902	pthread_mutex_lock (&reqlock);	1185	LOCK (wrklock);
903	pthread_mutex_lock (&reslock);	1186	LOCK (reqlock);
		1187	LOCK (reslock);
904	#if !HAVE_PREADWRITE	1188	#if !HAVE_PREADWRITE
905	pthread_mutex_lock (&preadwritelock);	1189	LOCK (preadwritelock);
906	#endif	1190	#endif
907	#if !HAVE_READDIR_R	1191	#if !HAVE_READDIR_R
908	pthread_mutex_lock (&readdirlock);	1192	LOCK (readdirlock);
909	#endif	1193	#endif
910	}	1194	}
911		1195
912	static void atfork_parent (void)	1196	static void atfork_parent (void)
913	{	1197	{
914	#if !HAVE_READDIR_R	1198	#if !HAVE_READDIR_R
915	pthread_mutex_unlock (&readdirlock);	1199	UNLOCK (readdirlock);
916	#endif	1200	#endif
917	#if !HAVE_PREADWRITE	1201	#if !HAVE_PREADWRITE
918	pthread_mutex_unlock (&preadwritelock);	1202	UNLOCK (preadwritelock);
919	#endif	1203	#endif
920	pthread_mutex_unlock (&reslock);	1204	UNLOCK (reslock);
921	pthread_mutex_unlock (&reqlock);	1205	UNLOCK (reqlock);
		1206	UNLOCK (wrklock);
922	}	1207	}
923		1208
924	static void atfork_child (void)	1209	static void atfork_child (void)
925	{	1210	{
926	aio_req prv;	1211	aio_req prv;
927		1212
928	started = 0;	1213	while (prv = reqq_shift (&req_queue))
		1214	req_free (prv);
929		1215
930	while (reqs)	1216	while (prv = reqq_shift (&res_queue))
		1217	req_free (prv);
		1218
		1219	while (wrk_first.next != &wrk_first)
931	{	1220	{
932	prv = reqs;	1221	worker *wrk = wrk_first.next;
933	reqs = prv->next;	1222
		1223	if (wrk->req)
		1224	req_free (wrk->req);
		1225
		1226	worker_clear (wrk);
934	req_free (prv);	1227	worker_free (wrk);
935	}	1228	}
936		1229
937	reqs = reqe = 0;	1230	started = 0;
938		1231	idle = 0;
939	while (ress)	1232	nreqs = 0;
940	{	1233	nready = 0;
941	prv = ress;	1234	npending = 0;
942	ress = prv->next;
943	req_free (prv);
944	}
945
946	ress = rese = 0;
947		1235
948	close (respipe [0]);	1236	close (respipe [0]);
949	close (respipe [1]);	1237	close (respipe [1]);
950	create_pipe ();	1238	create_pipe ();
951		1239
…		…
978	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
979		1267
980	BOOT:	1268	BOOT:
981	{	1269	{
982	HV *stash = gv_stashpv ("IO::AIO", 1);	1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
983	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
984	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
985	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));
986		1279
987	create_pipe ();	1280	create_pipe ();
988	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
989	}	1282	}
990		1283
991	void	1284	void
992	min_parallel (nthreads)	1285	max_poll_reqs (int nreqs)
993	int nthreads
994	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
995		1289
996	void	1290	void
997	max_parallel (nthreads)	1291	max_poll_time (double nseconds)
998	int nthreads
999	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);
1000		1309
1001	int	1310	int
1002	max_outstanding (nreqs)	1311	max_outstanding (int maxreqs)
1003	int nreqs	1312	PROTOTYPE: $
1004	PROTOTYPE: $
1005	CODE:	1313	CODE:
1006	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
1007	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
1008		1318
1009	void	1319	void
1010	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1011	SV * pathname	1321	SV8 * pathname
1012	int flags	1322	int flags
1013	int mode	1323	int mode
1014	SV * callback	1324	SV * callback
1015	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
1016	PPCODE:	1326	PPCODE:
1017	{	1327	{
1018	dREQ;	1328	dREQ;
1019		1329
1020	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
1021	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
1022	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
1023	req->fd = flags;	1333	req->int1 = flags;
1024	req->mode = mode;	1334	req->mode = mode;
1025		1335
1026	REQ_SEND;	1336	REQ_SEND;
1027	}	1337	}
1028		1338
…		…
1038	PPCODE:	1348	PPCODE:
1039	{	1349	{
1040	dREQ;	1350	dREQ;
1041		1351
1042	req->type = ix;	1352	req->type = ix;
1043	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
1044	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1045		1355
1046	REQ_SEND (req);	1356	REQ_SEND (req);
1047	}	1357	}
1048		1358
1049	void	1359	void
1050	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1051	SV * fh	1361	SV * fh
1052	UV offset	1362	UV offset
1053	UV length	1363	UV length
1054	SV * data	1364	SV8 * data
1055	UV dataoffset	1365	UV dataoffset
1056	SV * callback	1366	SV * callback
1057	ALIAS:	1367	ALIAS:
1058	aio_read = REQ_READ	1368	aio_read = REQ_READ
1059	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
1060	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
1061	PPCODE:	1371	PPCODE:
1062	{	1372	{
1063	aio_req req;
1064	STRLEN svlen;	1373	STRLEN svlen;
1065	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
1066		1375
1067	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
1068	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
1080	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
1081	}	1390	}
1082	else	1391	else
1083	{	1392	{
1084	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
1085	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
1086	}	1395	}
1087		1396
1088	if (length < 0)	1397	if (length < 0)
1089	croak ("length must not be negative");	1398	croak ("length must not be negative");
1090		1399
1091	{	1400	{
1092	dREQ;	1401	dREQ;
1093		1402
1094	req->type = ix;	1403	req->type = ix;
1095	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
1096	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1097	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
1098	req->offset = offset;	1407	req->offs = offset;
1099	req->length = length;	1408	req->size = length;
1100	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
1101	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
1102		1412
1103	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
1104	{	1414	{
1105	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
1106	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
1107	}	1417	}
1108		1418
1109	REQ_SEND;	1419	REQ_SEND;
1110	}	1420	}
		1421	}
		1422
		1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		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;
1111	}	1443	}
1112		1444
1113	void	1445	void
1114	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)
1115	SV * out_fh	1447	SV * out_fh
…		…
1121	PPCODE:	1453	PPCODE:
1122	{	1454	{
1123	dREQ;	1455	dREQ;
1124		1456
1125	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
1126	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
1127	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1128	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
1129	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1130	req->offset = in_offset;	1462	req->offs = in_offset;
1131	req->length = length;	1463	req->size = length;
1132		1464
1133	REQ_SEND;	1465	REQ_SEND;
1134	}	1466	}
1135		1467
1136	void	1468	void
…		…
1143	PPCODE:	1475	PPCODE:
1144	{	1476	{
1145	dREQ;	1477	dREQ;
1146		1478
1147	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
1148	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
1149	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1150	req->offset = offset;	1482	req->offs = offset;
1151	req->length = length;	1483	req->size = length;
1152		1484
1153	REQ_SEND;	1485	REQ_SEND;
1154	}	1486	}
1155		1487
1156	void	1488	void
1157	aio_stat (fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
1158	SV * fh_or_path	1490	SV8 * fh_or_path
1159	SV * callback	1491	SV * callback
1160	ALIAS:	1492	ALIAS:
1161	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
1162	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
1163	PPCODE:	1495	PPCODE:
1164	{	1496	{
1165	dREQ;	1497	dREQ;
1166		1498
1167	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
1168	if (!req->statdata)	1500	if (!req->ptr2)
1169	{	1501	{
1170	req_free (req);	1502	req_free (req);
1171	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
1172	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
1173		1507
1174	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
1175	{	1509	{
1176	req->type = ix;	1510	req->type = ix;
1177	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
1178	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1179	}	1513	}
1180	else	1514	else
1181	{	1515	{
1182	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
1183	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1185	}	1519	}
1186		1520
1187	REQ_SEND;	1521	REQ_SEND;
1188	}	1522	}
1189		1523
1190	void	1524	void
1191	aio_unlink (pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
1192	SV * pathname	1526	SV8 * pathname
1193	SV * callback	1527	SV * callback
1194	ALIAS:	1528	ALIAS:
1195	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
1196	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
1197	aio_readdir = REQ_READDIR	1531	aio_readdir = REQ_READDIR
1198	PPCODE:	1532	PPCODE:
1199	{	1533	{
1200	dREQ;	1534	dREQ;
1201		1535
1202	req->type = ix;	1536	req->type = ix;
1203	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
1204	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;
1205		1551
		1552	req->type = REQ_MKDIR;
		1553	req->sv1 = newSVsv (pathname);
		1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1555	req->mode = mode;
		1556
1206	REQ_SEND;	1557	REQ_SEND;
1207	}	1558	}
1208		1559
1209	void	1560	void
1210	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1211	SV * oldpath	1562	SV8 * oldpath
1212	SV * newpath	1563	SV8 * newpath
1213	SV * callback	1564	SV * callback
1214	ALIAS:	1565	ALIAS:
1215	aio_link = REQ_LINK	1566	aio_link = REQ_LINK
1216	aio_symlink = REQ_SYMLINK	1567	aio_symlink = REQ_SYMLINK
1217	aio_rename = REQ_RENAME	1568	aio_rename = REQ_RENAME
1218	PPCODE:	1569	PPCODE:
1219	{	1570	{
1220	dREQ;	1571	dREQ;
1221		1572
1222	req->type = ix;	1573	req->type = ix;
1223	req->fh = newSVsv (oldpath);	1574	req->fh = newSVsv (oldpath);
1224	req->data2ptr = SvPVbyte_nolen (req->fh);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1225	req->data = newSVsv (newpath);	1576	req->sv1 = newSVsv (newpath);
1226	req->dataptr = SvPVbyte_nolen (req->data);	1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1227		1578
1228	REQ_SEND;	1579	REQ_SEND;
1229	}	1580	}
1230		1581
1231	void	1582	void
1232	aio_sleep (delay,callback=&PL_sv_undef)	1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1233	double delay	1584	SV8 * pathname
		1585	UV mode
		1586	UV dev
1234	SV * callback	1587	SV * callback
1235	PPCODE:	1588	PPCODE:
1236	{	1589	{
1237	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	}
1238		1600
		1601	void
		1602	aio_busy (delay,callback=&PL_sv_undef)
		1603	double delay
		1604	SV * callback
		1605	PPCODE:
		1606	{
		1607	dREQ;
		1608
1239	req->type = REQ_SLEEP;	1609	req->type = REQ_BUSY;
1240	req->fd = delay < 0. ? 0 : delay;	1610	req->int1 = delay < 0. ? 0 : delay;
1241	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1242		1612
1243	REQ_SEND;	1613	REQ_SEND;
1244	}	1614	}
1245		1615
1246	void	1616	void
…		…
1250	PPCODE:	1620	PPCODE:
1251	{	1621	{
1252	dREQ;	1622	dREQ;
1253		1623
1254	req->type = REQ_GROUP;	1624	req->type = REQ_GROUP;
		1625
1255	req_send (req);	1626	req_send (req);
1256
1257	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1258	}	1628	}
1259		1629
1260	void	1630	void
1261	aio_nop (callback=&PL_sv_undef)	1631	aio_nop (callback=&PL_sv_undef)
1262	SV * callback	1632	SV * callback
1263	PPCODE:	1633	PPCODE:
1264	{	1634	{
1265	dREQ;	1635	dREQ;
1266		1636
1267	req->type = REQ_NOP;	1637	req->type = REQ_NOP;
1268		1638
1269	REQ_SEND;	1639	REQ_SEND;
1270	}	1640	}
1271		1641
1272	#if 0	1642	int
1273		1643	aioreq_pri (int pri = 0)
1274	void	1644	PROTOTYPE: ;$
1275	aio_pri (int pri = DEFAULT_PRI)
1276	CODE:	1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
1277	if (pri < PRI_MIN) pri = PRI_MIN;	1649	if (pri < PRI_MIN) pri = PRI_MIN;
1278	if (pri > PRI_MAX) pri = PRI_MAX;	1650	if (pri > PRI_MAX) pri = PRI_MAX;
1279	next_pri = pri + PRI_BIAS;	1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
1280		1655
1281	#endif	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;
1282		1663
1283	void	1664	void
1284	flush ()	1665	flush ()
1285	PROTOTYPE:	1666	PROTOTYPE:
1286	CODE:	1667	CODE:
…		…
1288	{	1669	{
1289	poll_wait ();	1670	poll_wait ();
1290	poll_cb ();	1671	poll_cb ();
1291	}	1672	}
1292		1673
1293	void	1674	int
1294	poll()	1675	poll()
1295	PROTOTYPE:	1676	PROTOTYPE:
1296	CODE:	1677	CODE:
1297	if (nreqs)
1298	{
1299	poll_wait ();	1678	poll_wait ();
1300	poll_cb ();	1679	RETVAL = poll_cb ();
1301	}	1680	OUTPUT:
		1681	RETVAL
1302		1682
1303	int	1683	int
1304	poll_fileno()	1684	poll_fileno()
1305	PROTOTYPE:	1685	PROTOTYPE:
1306	CODE:	1686	CODE:
…		…
1318		1698
1319	void	1699	void
1320	poll_wait()	1700	poll_wait()
1321	PROTOTYPE:	1701	PROTOTYPE:
1322	CODE:	1702	CODE:
1323	if (nreqs)
1324	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	}
1325		1741
1326	int	1742	int
1327	nreqs()	1743	nreqs()
1328	PROTOTYPE:	1744	PROTOTYPE:
1329	CODE:	1745	CODE:
1330	RETVAL = nreqs;	1746	RETVAL = nreqs;
1331	OUTPUT:	1747	OUTPUT:
1332	RETVAL	1748	RETVAL
1333		1749
		1750	int
		1751	nready()
		1752	PROTOTYPE:
		1753	CODE:
		1754	RETVAL = get_nready ();
		1755	OUTPUT:
		1756	RETVAL
		1757
		1758	int
		1759	npending()
		1760	PROTOTYPE:
		1761	CODE:
		1762	RETVAL = get_npending ();
		1763	OUTPUT:
		1764	RETVAL
		1765
		1766	int
		1767	nthreads()
		1768	PROTOTYPE:
		1769	CODE:
		1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1771	RETVAL = started;
		1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1773	OUTPUT:
		1774	RETVAL
		1775
1334	PROTOTYPES: DISABLE	1776	PROTOTYPES: DISABLE
1335		1777
1336	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1337		1779
1338	void	1780	void
1339	cancel (aio_req_ornot req)	1781	cancel (aio_req_ornot req)
1340	PROTOTYPE:
1341	CODE:	1782	CODE:
1342	req_cancel (req);	1783	req_cancel (req);
1343		1784
1344	void	1785	void
1345	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1354	PPCODE:	1795	PPCODE:
1355	{	1796	{
1356	int i;	1797	int i;
1357	aio_req req;	1798	aio_req req;
1358		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
1359	if (grp->fd == 2)	1803	if (grp->int1 == 2)
1360	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1361		1805
1362	for (i = 1; i < items; ++i )	1806	for (i = 1; i < items; ++i )
1363	{	1807	{
1364	if (GIMME_V != G_VOID)	1808	if (GIMME_V != G_VOID)
…		…
1366		1810
1367	req = SvAIO_REQ (ST (i));	1811	req = SvAIO_REQ (ST (i));
1368		1812
1369	if (req)	1813	if (req)
1370	{	1814	{
1371	++grp->length;	1815	++grp->size;
1372	req->grp = grp;	1816	req->grp = grp;
1373		1817
1374	req->grp_prev = 0;	1818	req->grp_prev = 0;
1375	req->grp_next = grp->grp_first;	1819	req->grp_next = grp->grp_first;
1376		1820
…		…
1381	}	1825	}
1382	}	1826	}
1383	}	1827	}
1384		1828
1385	void	1829	void
		1830	cancel_subs (aio_req_ornot req)
		1831	CODE:
		1832	req_cancel_subs (req);
		1833
		1834	void
1386	result (aio_req grp, ...)	1835	result (aio_req grp, ...)
1387	CODE:	1836	CODE:
1388	{	1837	{
1389	int i;	1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
1390	AV *av = newAV ();	1843	av = newAV ();
1391		1844
1392	for (i = 1; i < items; ++i )	1845	for (i = 1; i < items; ++i )
1393	av_push (av, newSVsv (ST (i)));	1846	av_push (av, newSVsv (ST (i)));
1394		1847
1395	SvREFCNT_dec (grp->data);	1848	SvREFCNT_dec (grp->sv1);
1396	grp->data = (SV *)av;	1849	grp->sv1 = (SV *)av;
1397	}	1850	}
1398		1851
1399	void	1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
		1856
		1857	void
1400	feed_limit (aio_req grp, int limit)	1858	limit (aio_req grp, int limit)
1401	CODE:	1859	CODE:
1402	grp->fd2 = limit;	1860	grp->int2 = limit;
1403	aio_grp_feed (grp);	1861	aio_grp_feed (grp);
1404		1862
1405	void	1863	void
1406	feed (aio_req grp, SV *callback=&PL_sv_undef)	1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
1407	CODE:	1865	CODE:
1408	{	1866	{
1409	SvREFCNT_dec (grp->fh2);	1867	SvREFCNT_dec (grp->sv2);
1410	grp->fh2 = newSVsv (callback);	1868	grp->sv2 = newSVsv (callback);
1411		1869
1412	if (grp->fd2 <= 0)	1870	if (grp->int2 <= 0)
1413	grp->fd2 = 2;	1871	grp->int2 = 2;
1414		1872
1415	aio_grp_feed (grp);	1873	aio_grp_feed (grp);
1416	}	1874	}
1417		1875

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