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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.64 by root, Mon Oct 23 23:54:41 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	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */	413	SAVETMPS;
213	pthread_mutex_lock (&reslock);	414	PUSHMARK (SP);
214	#endif	415	EXTEND (SP, 1);
215	req = ress;
216	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
217	pthread_mutex_unlock (&reslock);
218	#endif
219		416
220	if (req)	417	switch (req->type)
221	return;	418	{
		419	case REQ_READDIR:
		420	{
		421	SV *rv = &PL_sv_undef;
222		422
223	FD_ZERO(&rfd);	423	if (req->result >= 0)
224	FD_SET(respipe [0], &rfd);	424	{
		425	int i;
		426	char *buf = req->ptr2;
		427	AV *av = newAV ();
225		428
226	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;
227	}	517	}
228	}
229		518
230	static void req_invoke (aio_req req)
231	{
232	dSP;
233	int errorno = errno;
234
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
236	return;
237
238	errno = req->errorno;
239
240	ENTER;
241	SAVETMPS;
242	PUSHMARK (SP);
243	EXTEND (SP, 1);
244
245	switch (req->type)
246	{
247	case REQ_READDIR:
248	{
249	SV *rv = &PL_sv_undef;
250
251	if (req->result >= 0)
252	{
253	char *buf = req->data2ptr;
254	AV *av = newAV ();
255
256	while (req->result)
257	{
258	SV *sv = newSVpv (buf, 0);
259
260	av_push (av, sv);
261	buf += SvCUR (sv) + 1;
262	req->result--;
263	}
264
265	rv = sv_2mortal (newRV_noinc ((SV *)av));
266	}
267
268	PUSHs (rv);
269	}
270	break;
271
272	case REQ_OPEN:
273	{
274	/* convert fd to fh */
275	SV *fh;
276
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;
279	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
280	SPAGAIN;
281
282	fh = SvREFCNT_inc (POPs);
283
284	PUSHMARK (SP);
285	XPUSHs (sv_2mortal (fh));
286	}
287	break;
288
289	case REQ_GROUP:
290	req->fd = 2; /* mark group as finished */
291
292	if (req->data)
293	{
294	int i;
295	AV *av = (AV *)req->data;
296
297	EXTEND (SP, AvFILL (av) + 1);
298	for (i = 0; i <= AvFILL (av); ++i)
299	PUSHs (*av_fetch (av, i, 0));
300	}
301	break;
302
303	case REQ_NOP:
304	case REQ_SLEEP:
305	break;
306
307	default:
308	PUSHs (sv_2mortal (newSViv (req->result)));
309	break;
310	}
311
312
313	PUTBACK;
314	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;
316
317	FREETMPS;
318	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{
324	req_free (req);
325	croak (0);
326	}
327	}
328
329	static void req_free (aio_req req)
330	{
331	if (req->grp)	519	if (req->grp)
332	{	520	{
333	aio_req grp = req->grp;	521	aio_req grp = req->grp;
334		522
335	/* unlink request */	523	/* unlink request */
…		…
340	grp->grp_first = req->grp_next;	528	grp->grp_first = req->grp_next;
341		529
342	aio_grp_dec (grp);	530	aio_grp_dec (grp);
343	}	531	}
344		532
		533	return !SvTRUE (ERRSV);
		534	}
		535
		536	static void req_free (aio_req req)
		537	{
345	if (req->self)	538	if (req->self)
346	{	539	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
349	}	542	}
350		543
351	SvREFCNT_dec (req->data);
352	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
		545	SvREFCNT_dec (req->sv1);
353	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
354	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);
356		548
357	if (req->type == REQ_READDIR && req->result >= 0)	549	if (req->flags & FLAG_PTR2_FREE)
358	free (req->data2ptr);	550	free (req->ptr2);
359		551
360	Safefree (req);	552	Safefree (req);
361	}	553	}
362		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
363	static void req_cancel (aio_req req)	569	static void req_cancel (aio_req req)
364	{	570	{
365	req->flags |= FLAG_CANCELLED;	571	req->flags |= FLAG_CANCELLED;
366		572
367	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))
368	{	588	{
369	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);
370		597
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	598	UNLOCK (wrklock);
372	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);
373	}	691	}
374	}	692	}
375		693
376	static int poll_cb ()	694	static int poll_cb ()
377	{	695	{
378	dSP;	696	dSP;
379	int count = 0;	697	int count = 0;
		698	int maxreqs = max_poll_reqs;
380	int do_croak = 0;	699	int do_croak = 0;
		700	struct timeval tv_start, tv_now;
381	aio_req req;	701	aio_req req;
		702
		703	if (max_poll_time)
		704	gettimeofday (&tv_start, 0);
		705
		706	block_sig ();
382		707
383	for (;;)	708	for (;;)
384	{	709	{
385	pthread_mutex_lock (&reslock);	710	for (;;)
386	req = ress;
387
388	if (req)
389	{	711	{
390	ress = req->next;	712	maybe_start_thread ();
391		713
		714	LOCK (reslock);
		715	req = reqq_shift (&res_queue);
		716
392	if (!ress)	717	if (req)
393	{	718	{
		719	--npending;
		720
		721	if (!res_queue.size)
		722	{
394	/* read any signals sent by the worker threads */	723	/* read any signals sent by the worker threads */
395	char buf [32];	724	char buf [4];
396	while (read (respipe [0], buf, 32) == 32)	725	while (read (respipe [0], buf, 4) == 4)
		726	;
397	;	727	}
		728	}
398		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)
399	rese = 0;	764	break;
400	}	765	}
401	}	766	}
402		767
403	pthread_mutex_unlock (&reslock);	768	if (nreqs <= max_outstanding)
404
405	if (!req)
406	break;	769	break;
407		770
408	--nreqs;	771	poll_wait ();
409		772
410	if (req->type == REQ_QUIT)	773	++maxreqs;
411	started--;
412	else if (req->type == REQ_GROUP && req->length)
413	{
414	req->fd = 1; /* mark request as delayed */
415	continue;
416	}
417	else
418	{
419	if (req->type == REQ_READ)
420	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
421
422	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
423	SvREADONLY_off (req->data);
424
425	if (req->statdata)
426	{
427	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
428	PL_laststatval = req->result;
429	PL_statcache = *(req->statdata);
430	}
431
432	req_invoke (req);
433
434	count++;
435	}
436
437	req_free (req);
438	}	774	}
439		775
		776	unblock_sig ();
440	return count;	777	return count;
441	}
442
443	static void *aio_proc(void *arg);
444
445	static void start_thread (void)
446	{
447	sigset_t fullsigset, oldsigset;
448	pthread_t tid;
449	pthread_attr_t attr;
450
451	pthread_attr_init (&attr);
452	pthread_attr_setstacksize (&attr, STACKSIZE);
453	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
454
455	sigfillset (&fullsigset);
456	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
457
458	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
459	started++;
460
461	sigprocmask (SIG_SETMASK, &oldsigset, 0);
462	}
463
464	static void req_send (aio_req req)
465	{
466	while (started < wanted && nreqs >= started)
467	start_thread ();
468
469	++nreqs;
470
471	pthread_mutex_lock (&reqlock);
472
473	req->next = 0;
474
475	if (reqe)
476	{
477	reqe->next = req;
478	reqe = req;
479	}
480	else
481	reqe = reqs = req;
482
483	pthread_cond_signal (&reqwait);
484	pthread_mutex_unlock (&reqlock);
485
486	if (nreqs > max_outstanding)
487	for (;;)
488	{
489	poll_cb ();
490
491	if (nreqs <= max_outstanding)
492	break;
493
494	poll_wait ();
495	}
496	}
497
498	static void end_thread (void)
499	{
500	aio_req req;
501	Newz (0, req, 1, aio_cb);
502	req->type = REQ_QUIT;
503
504	req_send (req);
505	}
506
507	static void min_parallel (int nthreads)
508	{
509	if (wanted < nthreads)
510	wanted = nthreads;
511	}
512
513	static void max_parallel (int nthreads)
514	{
515	int cur = started;
516
517	if (wanted > nthreads)
518	wanted = nthreads;
519
520	while (cur > wanted)
521	{
522	end_thread ();
523	cur--;
524	}
525
526	while (started > wanted)
527	{
528	poll_wait ();
529	poll_cb ();
530	}
531	}	778	}
532		779
533	static void create_pipe ()	780	static void create_pipe ()
534	{	781	{
535	if (pipe (respipe))	782	if (pipe (respipe))
…		…
552	/*	799	/*
553	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
554	* 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,
555	* but that's your problem, not mine.	802	* but that's your problem, not mine.
556	*/	803	*/
557	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
558		805
559	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)
560	{	807	{
561	ssize_t res;	808	ssize_t res;
562	off_t ooffset;	809	off_t ooffset;
563		810
564	pthread_mutex_lock (&preadwritelock);	811	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	812	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	813	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);	814	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);	815	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	816	UNLOCK (preadwritelock);
570		817
571	return res;	818	return res;
572	}	819	}
573		820
574	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)
575	{	822	{
576	ssize_t res;	823	ssize_t res;
577	off_t ooffset;	824	off_t ooffset;
578		825
579	pthread_mutex_lock (&preadwritelock);	826	LOCK (preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);	827	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);	829	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);	830	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);	831	UNLOCK (preadwritelock);
585		832
586	return res;	833	return res;
587	}	834	}
588	#endif	835	#endif
589		836
590	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
591	# define fdatasync fsync	838	# define fdatasync fsync
592	#endif	839	#endif
593		840
594	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
595	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
596		843
597	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)
598	{	845	{
599	char readahead_buf[4096];	846	dBUF;
600		847
601	while (count > 0)	848	while (count > 0)
602	{	849	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
604		851
605	pread (fd, readahead_buf, len, offset);	852	pread (fd, aio_buf, len, offset);
606	offset += len;	853	offset += len;
607	count -= len;	854	count -= len;
608	}	855	}
609		856
610	errno = 0;	857	errno = 0;
611	}	858	}
		859
612	#endif	860	#endif
613		861
614	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
616		864
617	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
618		866
619	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)
620	{	868	{
621	struct dirent *e;	869	struct dirent *e;
622	int errorno;	870	int errorno;
623		871
624	pthread_mutex_lock (&readdirlock);	872	LOCK (readdirlock);
625		873
626	e = readdir (dirp);	874	e = readdir (dirp);
627	errorno = errno;	875	errorno = errno;
628		876
629	if (e)	877	if (e)
…		…
632	strcpy (ent->d_name, e->d_name);	880	strcpy (ent->d_name, e->d_name);
633	}	881	}
634	else	882	else
635	*res = 0;	883	*res = 0;
636		884
637	pthread_mutex_unlock (&readdirlock);	885	UNLOCK (readdirlock);
638		886
639	errno = errorno;	887	errno = errorno;
640	return e ? 0 : -1;	888	return e ? 0 : -1;
641	}	889	}
642	#endif	890	#endif
643		891
644	/* sendfile always needs emulation */	892	/* sendfile always needs emulation */
645	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)
646	{	894	{
647	ssize_t res;	895	ssize_t res;
648		896
649	if (!count)	897	if (!count)
650	return 0;	898	return 0;
…		…
661	{	909	{
662	off_t sbytes;	910	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		912
665	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
667	res = sbytes;	915	res = sbytes;
668	}	916	}
669		917
670	# elif __hpux	918	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
699	#endif	947	#endif
700	)	948	)
701	)	949	)
702	{	950	{
703	/* emulate sendfile. this is a major pain in the ass */	951	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];	952	dBUF;
		953
705	res = 0;	954	res = 0;
706		955
707	while (count)	956	while (count)
708	{	957	{
709	ssize_t cnt;	958	ssize_t cnt;
710		959
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
712		961
713	if (cnt <= 0)	962	if (cnt <= 0)
714	{	963	{
715	if (cnt && !res) res = -1;	964	if (cnt && !res) res = -1;
716	break;	965	break;
717	}	966	}
718		967
719	cnt = write (ofd, buf, cnt);	968	cnt = write (ofd, aio_buf, cnt);
720		969
721	if (cnt <= 0)	970	if (cnt <= 0)
722	{	971	{
723	if (cnt && !res) res = -1;	972	if (cnt && !res) res = -1;
724	break;	973	break;
…		…
732		981
733	return res;	982	return res;
734	}	983	}
735		984
736	/* read a full directory */	985	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)	986	static void scandir_ (aio_req req, worker *self)
738	{	987	{
739	DIR *dirp = opendir (path);	988	DIR *dirp;
740	union	989	union
741	{	990	{
742	struct dirent d;	991	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;	993	} *u;
745	struct dirent *entp;	994	struct dirent *entp;
746	char *name, *names;	995	char *name, *names;
747	int memlen = 4096;	996	int memlen = 4096;
748	int memofs = 0;	997	int memofs = 0;
749	int res = 0;	998	int res = 0;
750	int errorno;	999	int errorno;
751		1000
752	if (!dirp)	1001	LOCK (wrklock);
753	return -1;	1002	self->dirp = dirp = opendir (req->ptr1);
754		1003	self->dbuf = u = malloc (sizeof (*u));
		1004	req->flags |= FLAG_PTR2_FREE;
755	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);
756		1058
757	for (;;)	1059	for (;;)
758	{	1060	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);	1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
760		1062
761	if (!entp)	1063	LOCK (reqlock);
762	break;
763
764	name = entp->d_name;
765
766	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
767	{
768	int len = strlen (name) + 1;
769
770	res++;
771
772	while (memofs + len > memlen)
773	{
774	memlen *= 2;
775	names = realloc (names, memlen);
776	if (!names)
777	break;
778	}
779
780	memcpy (names + memofs, name, len);
781	memofs += len;
782	}
783	}
784
785	errorno = errno;
786	closedir (dirp);
787
788	if (errorno)
789	{
790	free (names);
791	errno = errorno;
792	res = -1;
793	}
794
795	*namesp = (void *)names;
796	return res;
797	}
798
799	/*****************************************************************************/
800
801	static void *aio_proc (void *thr_arg)
802	{
803	aio_req req;
804	int type;
805
806	do
807	{
808	pthread_mutex_lock (&reqlock);
809		1064
810	for (;;)	1065	for (;;)
811	{	1066	{
812	req = reqs;	1067	self->req = req = reqq_shift (&req_queue);
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819		1068
820	if (req)	1069	if (req)
821	break;	1070	break;
822		1071
823	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;
824	}	1093	}
825		1094
826	pthread_mutex_unlock (&reqlock);	1095	--nready;
		1096
		1097	UNLOCK (reqlock);
827		1098
828	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830		1100
831	if (!(req->flags & FLAG_CANCELLED))	1101	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)	1102	switch (req->type)
833	{	1103	{
834	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;
835	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;
836		1106
837	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;
838	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;
839		1109
840	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;
841	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;
842	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;
843		1113
844	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;
845	case REQ_CLOSE: req->result = close (req->fd); break;	1115	case REQ_CLOSE: req->result = close (req->int1); break;
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
847	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;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
850	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;
851		1124
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
855		1128
856	case REQ_SLEEP:	1129	case REQ_BUSY:
857	{	1130	{
858	struct timeval tv;	1131	struct timeval tv;
859		1132
860	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
861	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
862		1135
863	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
864	}	1137	}
865		1138
866	case REQ_GROUP:	1139	case REQ_GROUP:
867	case REQ_NOP:	1140	case REQ_NOP:
		1141	break;
		1142
868	case REQ_QUIT:	1143	case REQ_QUIT:
869	break;	1144	goto quit;
870		1145
871	default:	1146	default:
872	req->result = ENOSYS;	1147	req->result = ENOSYS;
873	break;	1148	break;
874	}	1149	}
875		1150
876	req->errorno = errno;	1151	req->errorno = errno;
877		1152
878	pthread_mutex_lock (&reslock);	1153	LOCK (reslock);
879		1154
880	req->next = 0;	1155	++npending;
881		1156
882	if (rese)	1157	if (!reqq_push (&res_queue, req))
883	{	1158	{
884	rese->next = req;
885	rese = req;
886	}
887	else
888	{
889	rese = ress = req;
890
891	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
892	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);
893	}	1165	}
894		1166
895	pthread_mutex_unlock (&reslock);	1167	self->req = 0;
		1168	worker_clear (self);
		1169
		1170	UNLOCK (reslock);
896	}	1171	}
897	while (type != REQ_QUIT);	1172
		1173	quit:
		1174	LOCK (wrklock);
		1175	worker_free (self);
		1176	UNLOCK (wrklock);
898		1177
899	return 0;	1178	return 0;
900	}	1179	}
901		1180
902	/*****************************************************************************/	1181	/*****************************************************************************/
903		1182
904	static void atfork_prepare (void)	1183	static void atfork_prepare (void)
905	{	1184	{
906	pthread_mutex_lock (&reqlock);	1185	LOCK (wrklock);
907	pthread_mutex_lock (&reslock);	1186	LOCK (reqlock);
		1187	LOCK (reslock);
908	#if !HAVE_PREADWRITE	1188	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);	1189	LOCK (preadwritelock);
910	#endif	1190	#endif
911	#if !HAVE_READDIR_R	1191	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);	1192	LOCK (readdirlock);
913	#endif	1193	#endif
914	}	1194	}
915		1195
916	static void atfork_parent (void)	1196	static void atfork_parent (void)
917	{	1197	{
918	#if !HAVE_READDIR_R	1198	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);	1199	UNLOCK (readdirlock);
920	#endif	1200	#endif
921	#if !HAVE_PREADWRITE	1201	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);	1202	UNLOCK (preadwritelock);
923	#endif	1203	#endif
924	pthread_mutex_unlock (&reslock);	1204	UNLOCK (reslock);
925	pthread_mutex_unlock (&reqlock);	1205	UNLOCK (reqlock);
		1206	UNLOCK (wrklock);
926	}	1207	}
927		1208
928	static void atfork_child (void)	1209	static void atfork_child (void)
929	{	1210	{
930	aio_req prv;	1211	aio_req prv;
931		1212
932	started = 0;	1213	while (prv = reqq_shift (&req_queue))
		1214	req_free (prv);
933		1215
934	while (reqs)	1216	while (prv = reqq_shift (&res_queue))
		1217	req_free (prv);
		1218
		1219	while (wrk_first.next != &wrk_first)
935	{	1220	{
936	prv = reqs;	1221	worker *wrk = wrk_first.next;
937	reqs = prv->next;	1222
		1223	if (wrk->req)
		1224	req_free (wrk->req);
		1225
		1226	worker_clear (wrk);
938	req_free (prv);	1227	worker_free (wrk);
939	}	1228	}
940		1229
941	reqs = reqe = 0;	1230	started = 0;
942		1231	idle = 0;
943	while (ress)	1232	nreqs = 0;
944	{	1233	nready = 0;
945	prv = ress;	1234	npending = 0;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951		1235
952	close (respipe [0]);	1236	close (respipe [0]);
953	close (respipe [1]);	1237	close (respipe [1]);
954	create_pipe ();	1238	create_pipe ();
955		1239
…		…
982	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
983		1267
984	BOOT:	1268	BOOT:
985	{	1269	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	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));
990		1279
991	create_pipe ();	1280	create_pipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
993	}	1282	}
994		1283
995	void	1284	void
996	min_parallel (nthreads)	1285	max_poll_reqs (int nreqs)
997	int nthreads
998	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
999		1289
1000	void	1290	void
1001	max_parallel (nthreads)	1291	max_poll_time (double nseconds)
1002	int nthreads
1003	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);
1004		1309
1005	int	1310	int
1006	max_outstanding (nreqs)	1311	max_outstanding (int maxreqs)
1007	int nreqs	1312	PROTOTYPE: $
1008	PROTOTYPE: $
1009	CODE:	1313	CODE:
1010	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
1011	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
1012		1318
1013	void	1319	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1015	SV * pathname	1321	SV8 * pathname
1016	int flags	1322	int flags
1017	int mode	1323	int mode
1018	SV * callback	1324	SV * callback
1019	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
1020	PPCODE:	1326	PPCODE:
1021	{	1327	{
1022	dREQ;	1328	dREQ;
1023		1329
1024	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
1025	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
1026	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
1027	req->fd = flags;	1333	req->int1 = flags;
1028	req->mode = mode;	1334	req->mode = mode;
1029		1335
1030	REQ_SEND;	1336	REQ_SEND;
1031	}	1337	}
1032		1338
…		…
1042	PPCODE:	1348	PPCODE:
1043	{	1349	{
1044	dREQ;	1350	dREQ;
1045		1351
1046	req->type = ix;	1352	req->type = ix;
1047	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
1048	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1049		1355
1050	REQ_SEND (req);	1356	REQ_SEND (req);
1051	}	1357	}
1052		1358
1053	void	1359	void
1054	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1055	SV * fh	1361	SV * fh
1056	UV offset	1362	UV offset
1057	UV length	1363	UV length
1058	SV * data	1364	SV8 * data
1059	UV dataoffset	1365	UV dataoffset
1060	SV * callback	1366	SV * callback
1061	ALIAS:	1367	ALIAS:
1062	aio_read = REQ_READ	1368	aio_read = REQ_READ
1063	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
1064	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
1065	PPCODE:	1371	PPCODE:
1066	{	1372	{
1067	aio_req req;
1068	STRLEN svlen;	1373	STRLEN svlen;
1069	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
1070		1375
1071	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
1072	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
1084	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
1085	}	1390	}
1086	else	1391	else
1087	{	1392	{
1088	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
1089	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
1090	}	1395	}
1091		1396
1092	if (length < 0)	1397	if (length < 0)
1093	croak ("length must not be negative");	1398	croak ("length must not be negative");
1094		1399
1095	{	1400	{
1096	dREQ;	1401	dREQ;
1097		1402
1098	req->type = ix;	1403	req->type = ix;
1099	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
1100	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1101	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
1102	req->offset = offset;	1407	req->offs = offset;
1103	req->length = length;	1408	req->size = length;
1104	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
1105	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
1106		1412
1107	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
1108	{	1414	{
1109	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
1110	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
1111	}	1417	}
1112		1418
1113	REQ_SEND;	1419	REQ_SEND;
1114	}	1420	}
		1421	}
		1422
		1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		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;
1115	}	1443	}
1116		1444
1117	void	1445	void
1118	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)
1119	SV * out_fh	1447	SV * out_fh
…		…
1125	PPCODE:	1453	PPCODE:
1126	{	1454	{
1127	dREQ;	1455	dREQ;
1128		1456
1129	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
1130	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
1131	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1132	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
1133	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1134	req->offset = in_offset;	1462	req->offs = in_offset;
1135	req->length = length;	1463	req->size = length;
1136		1464
1137	REQ_SEND;	1465	REQ_SEND;
1138	}	1466	}
1139		1467
1140	void	1468	void
…		…
1147	PPCODE:	1475	PPCODE:
1148	{	1476	{
1149	dREQ;	1477	dREQ;
1150		1478
1151	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
1152	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1154	req->offset = offset;	1482	req->offs = offset;
1155	req->length = length;	1483	req->size = length;
1156		1484
1157	REQ_SEND;	1485	REQ_SEND;
1158	}	1486	}
1159		1487
1160	void	1488	void
1161	aio_stat (fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
1162	SV * fh_or_path	1490	SV8 * fh_or_path
1163	SV * callback	1491	SV * callback
1164	ALIAS:	1492	ALIAS:
1165	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
1166	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
1167	PPCODE:	1495	PPCODE:
1168	{	1496	{
1169	dREQ;	1497	dREQ;
1170		1498
1171	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
1172	if (!req->statdata)	1500	if (!req->ptr2)
1173	{	1501	{
1174	req_free (req);	1502	req_free (req);
1175	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
1176	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
1177		1507
1178	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
1179	{	1509	{
1180	req->type = ix;	1510	req->type = ix;
1181	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
1182	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	}	1513	}
1184	else	1514	else
1185	{	1515	{
1186	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
1187	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
1188	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1189	}	1519	}
1190		1520
1191	REQ_SEND;	1521	REQ_SEND;
1192	}	1522	}
1193		1523
1194	void	1524	void
1195	aio_unlink (pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
1196	SV * pathname	1526	SV8 * pathname
1197	SV * callback	1527	SV * callback
1198	ALIAS:	1528	ALIAS:
1199	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
1200	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
1201	aio_readdir = REQ_READDIR	1531	aio_readdir = REQ_READDIR
1202	PPCODE:	1532	PPCODE:
1203	{	1533	{
1204	dREQ;	1534	dREQ;
1205		1535
1206	req->type = ix;	1536	req->type = ix;
1207	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
1208	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;
1209		1551
		1552	req->type = REQ_MKDIR;
		1553	req->sv1 = newSVsv (pathname);
		1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1555	req->mode = mode;
		1556
1210	REQ_SEND;	1557	REQ_SEND;
1211	}	1558	}
1212		1559
1213	void	1560	void
1214	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1215	SV * oldpath	1562	SV8 * oldpath
1216	SV * newpath	1563	SV8 * newpath
1217	SV * callback	1564	SV * callback
1218	ALIAS:	1565	ALIAS:
1219	aio_link = REQ_LINK	1566	aio_link = REQ_LINK
1220	aio_symlink = REQ_SYMLINK	1567	aio_symlink = REQ_SYMLINK
1221	aio_rename = REQ_RENAME	1568	aio_rename = REQ_RENAME
1222	PPCODE:	1569	PPCODE:
1223	{	1570	{
1224	dREQ;	1571	dREQ;
1225		1572
1226	req->type = ix;	1573	req->type = ix;
1227	req->fh = newSVsv (oldpath);	1574	req->fh = newSVsv (oldpath);
1228	req->data2ptr = SvPVbyte_nolen (req->fh);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1229	req->data = newSVsv (newpath);	1576	req->sv1 = newSVsv (newpath);
1230	req->dataptr = SvPVbyte_nolen (req->data);	1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1231		1578
1232	REQ_SEND;	1579	REQ_SEND;
1233	}	1580	}
1234		1581
1235	void	1582	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1237	double delay	1584	SV8 * pathname
		1585	UV mode
		1586	UV dev
1238	SV * callback	1587	SV * callback
1239	PPCODE:	1588	PPCODE:
1240	{	1589	{
1241	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	}
1242		1600
		1601	void
		1602	aio_busy (delay,callback=&PL_sv_undef)
		1603	double delay
		1604	SV * callback
		1605	PPCODE:
		1606	{
		1607	dREQ;
		1608
1243	req->type = REQ_SLEEP;	1609	req->type = REQ_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1610	req->int1 = delay < 0. ? 0 : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1246		1612
1247	REQ_SEND;	1613	REQ_SEND;
1248	}	1614	}
1249		1615
1250	void	1616	void
…		…
1254	PPCODE:	1620	PPCODE:
1255	{	1621	{
1256	dREQ;	1622	dREQ;
1257		1623
1258	req->type = REQ_GROUP;	1624	req->type = REQ_GROUP;
		1625
1259	req_send (req);	1626	req_send (req);
1260
1261	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1262	}	1628	}
1263		1629
1264	void	1630	void
1265	aio_nop (callback=&PL_sv_undef)	1631	aio_nop (callback=&PL_sv_undef)
1266	SV * callback	1632	SV * callback
1267	PPCODE:	1633	PPCODE:
1268	{	1634	{
1269	dREQ;	1635	dREQ;
1270		1636
1271	req->type = REQ_NOP;	1637	req->type = REQ_NOP;
1272		1638
1273	REQ_SEND;	1639	REQ_SEND;
1274	}	1640	}
1275		1641
1276	#if 0	1642	int
1277		1643	aioreq_pri (int pri = 0)
1278	void	1644	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1649	if (pri < PRI_MIN) pri = PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1650	if (pri > PRI_MAX) pri = PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
1284		1655
1285	#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;
1286		1663
1287	void	1664	void
1288	flush ()	1665	flush ()
1289	PROTOTYPE:	1666	PROTOTYPE:
1290	CODE:	1667	CODE:
…		…
1292	{	1669	{
1293	poll_wait ();	1670	poll_wait ();
1294	poll_cb ();	1671	poll_cb ();
1295	}	1672	}
1296		1673
1297	void	1674	int
1298	poll()	1675	poll()
1299	PROTOTYPE:	1676	PROTOTYPE:
1300	CODE:	1677	CODE:
1301	if (nreqs)
1302	{
1303	poll_wait ();	1678	poll_wait ();
1304	poll_cb ();	1679	RETVAL = poll_cb ();
1305	}	1680	OUTPUT:
		1681	RETVAL
1306		1682
1307	int	1683	int
1308	poll_fileno()	1684	poll_fileno()
1309	PROTOTYPE:	1685	PROTOTYPE:
1310	CODE:	1686	CODE:
…		…
1322		1698
1323	void	1699	void
1324	poll_wait()	1700	poll_wait()
1325	PROTOTYPE:	1701	PROTOTYPE:
1326	CODE:	1702	CODE:
1327	if (nreqs)
1328	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	}
1329		1741
1330	int	1742	int
1331	nreqs()	1743	nreqs()
1332	PROTOTYPE:	1744	PROTOTYPE:
1333	CODE:	1745	CODE:
1334	RETVAL = nreqs;	1746	RETVAL = nreqs;
1335	OUTPUT:	1747	OUTPUT:
1336	RETVAL	1748	RETVAL
1337		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
1338	PROTOTYPES: DISABLE	1776	PROTOTYPES: DISABLE
1339		1777
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1779
1342	void	1780	void
1343	cancel (aio_req_ornot req)	1781	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1782	CODE:
1346	req_cancel (req);	1783	req_cancel (req);
1347		1784
1348	void	1785	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1358	PPCODE:	1795	PPCODE:
1359	{	1796	{
1360	int i;	1797	int i;
1361	aio_req req;	1798	aio_req req;
1362		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
1363	if (grp->fd == 2)	1803	if (grp->int1 == 2)
1364	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");
1365		1805
1366	for (i = 1; i < items; ++i )	1806	for (i = 1; i < items; ++i )
1367	{	1807	{
1368	if (GIMME_V != G_VOID)	1808	if (GIMME_V != G_VOID)
…		…
1370		1810
1371	req = SvAIO_REQ (ST (i));	1811	req = SvAIO_REQ (ST (i));
1372		1812
1373	if (req)	1813	if (req)
1374	{	1814	{
1375	++grp->length;	1815	++grp->size;
1376	req->grp = grp;	1816	req->grp = grp;
1377		1817
1378	req->grp_prev = 0;	1818	req->grp_prev = 0;
1379	req->grp_next = grp->grp_first;	1819	req->grp_next = grp->grp_first;
1380		1820
…		…
1385	}	1825	}
1386	}	1826	}
1387	}	1827	}
1388		1828
1389	void	1829	void
		1830	cancel_subs (aio_req_ornot req)
		1831	CODE:
		1832	req_cancel_subs (req);
		1833
		1834	void
1390	result (aio_req grp, ...)	1835	result (aio_req grp, ...)
1391	CODE:	1836	CODE:
1392	{	1837	{
1393	int i;	1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
1394	AV *av = newAV ();	1843	av = newAV ();
1395		1844
1396	for (i = 1; i < items; ++i )	1845	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1846	av_push (av, newSVsv (ST (i)));
1398		1847
1399	SvREFCNT_dec (grp->data);	1848	SvREFCNT_dec (grp->sv1);
1400	grp->data = (SV *)av;	1849	grp->sv1 = (SV *)av;
1401	}	1850	}
1402		1851
1403	void	1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
		1856
		1857	void
1404	feed_limit (aio_req grp, int limit)	1858	limit (aio_req grp, int limit)
1405	CODE:	1859	CODE:
1406	grp->fd2 = limit;	1860	grp->int2 = limit;
1407	aio_grp_feed (grp);	1861	aio_grp_feed (grp);
1408		1862
1409	void	1863	void
1410	feed (aio_req grp, SV *callback=&PL_sv_undef)	1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
1411	CODE:	1865	CODE:
1412	{	1866	{
1413	SvREFCNT_dec (grp->fh2);	1867	SvREFCNT_dec (grp->sv2);
1414	grp->fh2 = newSVsv (callback);	1868	grp->sv2 = newSVsv (callback);
1415		1869
1416	if (grp->fd2 <= 0)	1870	if (grp->int2 <= 0)
1417	grp->fd2 = 2;	1871	grp->int2 = 2;
1418		1872
1419	aio_grp_feed (grp);	1873	aio_grp_feed (grp);
1420	}	1874	}
1421		1875

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