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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 1.97 by root, Sun Jan 7 22:59:57 2007 UTC

1	#if __linux	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
2	# define _GNU_SOURCE	5	# define _GNU_SOURCE
3	#endif	6	#endif
4		7
		8	/* just in case */
5	#define _REENTRANT 1	9	#define _REENTRANT 1
6		10
7	#include <errno.h>	11	#include <errno.h>
8		12
9	#include "EXTERN.h"	13	#include "EXTERN.h"
…		…
13	#include "autoconf/config.h"	17	#include "autoconf/config.h"
14		18
15	#include <pthread.h>	19	#include <pthread.h>
16		20
17	#include <stddef.h>	21	#include <stddef.h>
		22	#include <stdlib.h>
18	#include <errno.h>	23	#include <errno.h>
19	#include <sys/time.h>	24	#include <sys/time.h>
20	#include <sys/select.h>	25	#include <sys/select.h>
21	#include <sys/types.h>	26	#include <sys/types.h>
22	#include <sys/stat.h>	27	#include <sys/stat.h>
…		…
39	# else	44	# else
40	# error sendfile support requested but not available	45	# error sendfile support requested but not available
41	# endif	46	# endif
42	#endif	47	#endif
43		48
		49	/* number of seconds after which idle threads exit */
		50	#define IDLE_TIMEOUT 10
		51
44	/* used for struct dirent, AIX doesn't provide it */	52	/* used for struct dirent, AIX doesn't provide it */
45	#ifndef NAME_MAX	53	#ifndef NAME_MAX
46	# define NAME_MAX 4096	54	# define NAME_MAX 4096
47	#endif	55	#endif
48		56
		57	#ifndef PTHREAD_STACK_MIN
		58	/* care for broken platforms, e.g. windows */
		59	# define PTHREAD_STACK_MIN 16384
		60	#endif
		61
49	#if __ia64	62	#if __ia64
50	# define STACKSIZE 65536	63	# define STACKSIZE 65536
		64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		65	# define STACKSIZE PTHREAD_STACK_MIN
51	#else	66	#else
52	# define STACKSIZE 8192	67	# define STACKSIZE 16384
53	#endif	68	#endif
		69
		70	/* wether word reads are potentially non-atomic.
		71	* this is conservatice, likely most arches this runs
		72	* on have atomic word read/writes.
		73	*/
		74	#ifndef WORDACCESS_UNSAFE
		75	# if __i386 || __x86_64
		76	# define WORDACCESS_UNSAFE 0
		77	# else
		78	# define WORDACCESS_UNSAFE 1
		79	# endif
		80	#endif
		81
		82	/* buffer size for various temporary buffers */
		83	#define AIO_BUFSIZE 65536
		84
		85	#define dBUF \
		86	char *aio_buf; \
		87	LOCK (wrklock); \
		88	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		89	UNLOCK (wrklock); \
		90	if (!aio_buf) \
		91	return -1;
		92
		93	typedef SV SV8; /* byte-sv, used for argument-checking */
54		94
55	enum {	95	enum {
56	REQ_QUIT,	96	REQ_QUIT,
57	REQ_OPEN, REQ_CLOSE,	97	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,	99	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,	101	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	102	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
63	REQ_READDIR,	103	REQ_MKNOD, REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,	104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
65	REQ_GROUP, REQ_NOP,	105	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,	106	REQ_BUSY,
67	};	107	};
68		108
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		111
72	typedef struct aio_cb	112	typedef struct aio_cb
73	{	113	{
74	struct aio_cb *volatile next;	114	struct aio_cb *volatile next;
75		115
76	SV *data, *callback;	116	SV *callback, *fh;
77	SV *fh, *fh2;	117	SV *sv1, *sv2;
78	void *dataptr, *data2ptr;	118	void *ptr1, *ptr2;
79	Stat_t *statdata;
80	off_t offset;	119	off_t offs;
81	size_t length;	120	size_t size;
82	ssize_t result;	121	ssize_t result;
83		122
84	STRLEN dataoffset;	123	STRLEN stroffset;
85	int type;	124	int type;
86	int fd, fd2;	125	int int1, int2;
87	int errorno;	126	int errorno;
88	mode_t mode; /* open */	127	mode_t mode; /* open */
89		128
90	unsigned char flags;	129	unsigned char flags;
91	unsigned char pri;	130	unsigned char pri;
…		…
93	SV *self; /* the perl counterpart of this request, if any */	132	SV *self; /* the perl counterpart of this request, if any */
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
95	} aio_cb;	134	} aio_cb;
96		135
97	enum {	136	enum {
98	FLAG_CANCELLED = 0x01,	137	FLAG_CANCELLED = 0x01, /* request was cancelled */
		138	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		139	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
99	};	140	};
100		141
101	typedef aio_cb *aio_req;	142	typedef aio_cb *aio_req;
102	typedef aio_cb *aio_req_ornot;	143	typedef aio_cb *aio_req_ornot;
103		144
…		…
105	PRI_MIN = -4,	146	PRI_MIN = -4,
106	PRI_MAX = 4,	147	PRI_MAX = 4,
107		148
108	DEFAULT_PRI = 0,	149	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,	150	PRI_BIAS = -PRI_MIN,
		151	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
110	};	152	};
111		153
		154	#define AIO_TICKS ((1000000 + 1023) >> 10)
		155
		156	static unsigned int max_poll_time = 0;
		157	static unsigned int max_poll_reqs = 0;
		158
		159	/* calculcate time difference in ~1/AIO_TICKS of a second */
		160	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		161	{
		162	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		163	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		164	}
		165
		166	static pthread_t main_tid;
		167	static int main_sig;
		168	static int block_sig_level;
		169
		170	void block_sig ()
		171	{
		172	sigset_t ss;
		173
		174	if (block_sig_level++)
		175	return;
		176
		177	if (!main_sig)
		178	return;
		179
		180	sigemptyset (&ss);
		181	sigaddset (&ss, main_sig);
		182	pthread_sigmask (SIG_BLOCK, &ss, 0);
		183	}
		184
		185	void unblock_sig ()
		186	{
		187	sigset_t ss;
		188
		189	if (--block_sig_level)
		190	return;
		191
		192	if (!main_sig)
		193	return;
		194
		195	sigemptyset (&ss);
		196	sigaddset (&ss, main_sig);
		197	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		198	}
		199
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;	200	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113		201
114	static int started, wanted;	202	static unsigned int started, idle, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;
117	static int respipe [2];
118		203
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	204	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP	205	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else	206	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER	207	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif	208	#endif
124		209
		210	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		211	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		212
		213	/* worker threads management */
		214	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		215
		216	typedef struct worker {
		217	/* locked by wrklock */
		218	struct worker *prev, *next;
		219
		220	pthread_t tid;
		221
		222	/* locked by reslock, reqlock or wrklock */
		223	aio_req req; /* currently processed request */
		224	void *dbuf;
		225	DIR *dirp;
		226	} worker;
		227
		228	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		229
		230	static void worker_clear (worker *wrk)
		231	{
		232	if (wrk->dirp)
		233	{
		234	closedir (wrk->dirp);
		235	wrk->dirp = 0;
		236	}
		237
		238	if (wrk->dbuf)
		239	{
		240	free (wrk->dbuf);
		241	wrk->dbuf = 0;
		242	}
		243	}
		244
		245	static void worker_free (worker *wrk)
		246	{
		247	wrk->next->prev = wrk->prev;
		248	wrk->prev->next = wrk->next;
		249
		250	free (wrk);
		251	}
		252
		253	static volatile unsigned int nreqs, nready, npending;
		254	static volatile unsigned int max_idle = 4;
		255	static volatile unsigned int max_outstanding = 0xffffffff;
		256	static int respipe [2];
		257
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128		261
129	static volatile aio_req reqs, reqe; /* queue start, queue end */	262	#if WORDACCESS_UNSAFE
130	static volatile aio_req ress, rese; /* queue start, queue end */
131		263
		264	static unsigned int get_nready ()
		265	{
		266	unsigned int retval;
		267
		268	LOCK (reqlock);
		269	retval = nready;
		270	UNLOCK (reqlock);
		271
		272	return retval;
		273	}
		274
		275	static unsigned int get_npending ()
		276	{
		277	unsigned int retval;
		278
		279	LOCK (reslock);
		280	retval = npending;
		281	UNLOCK (reslock);
		282
		283	return retval;
		284	}
		285
		286	static unsigned int get_nthreads ()
		287	{
		288	unsigned int retval;
		289
		290	LOCK (wrklock);
		291	retval = started;
		292	UNLOCK (wrklock);
		293
		294	return retval;
		295	}
		296
		297	#else
		298
		299	# define get_nready() nready
		300	# define get_npending() npending
		301	# define get_nthreads() started
		302
		303	#endif
		304
		305	/*
		306	* a somewhat faster data structure might be nice, but
		307	* with 8 priorities this actually needs <20 insns
		308	* per shift, the most expensive operation.
		309	*/
		310	typedef struct {
		311	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		312	int size;
		313	} reqq;
		314
		315	static reqq req_queue;
		316	static reqq res_queue;
		317
		318	int reqq_push (reqq *q, aio_req req)
		319	{
		320	int pri = req->pri;
		321	req->next = 0;
		322
		323	if (q->qe[pri])
		324	{
		325	q->qe[pri]->next = req;
		326	q->qe[pri] = req;
		327	}
		328	else
		329	q->qe[pri] = q->qs[pri] = req;
		330
		331	return q->size++;
		332	}
		333
		334	aio_req reqq_shift (reqq *q)
		335	{
		336	int pri;
		337
		338	if (!q->size)
		339	return 0;
		340
		341	--q->size;
		342
		343	for (pri = NUM_PRI; pri--; )
		344	{
		345	aio_req req = q->qs[pri];
		346
		347	if (req)
		348	{
		349	if (!(q->qs[pri] = req->next))
		350	q->qe[pri] = 0;
		351
		352	return req;
		353	}
		354	}
		355
		356	abort ();
		357	}
		358
		359	static int poll_cb ();
132	static void req_invoke (aio_req req);	360	static int req_invoke (aio_req req);
133	static void req_free (aio_req req);	361	static void req_free (aio_req req);
		362	static void req_cancel (aio_req req);
134		363
135	/* must be called at most once */	364	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	365	static SV *req_sv (aio_req req, const char *klass)
137	{	366	{
138	if (!req->self)	367	if (!req->self)
…		…
156	return mg ? (aio_req)mg->mg_ptr : 0;	385	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	386	}
158		387
159	static void aio_grp_feed (aio_req grp)	388	static void aio_grp_feed (aio_req grp)
160	{	389	{
		390	block_sig ();
		391
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	392	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
162	{	393	{
163	int old_len = grp->length;	394	int old_len = grp->size;
164		395
165	if (grp->fh2 && SvOK (grp->fh2))	396	if (grp->sv2 && SvOK (grp->sv2))
166	{	397	{
167	dSP;	398	dSP;
168		399
169	ENTER;	400	ENTER;
170	SAVETMPS;	401	SAVETMPS;
171	PUSHMARK (SP);	402	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	403	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;	404	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);	405	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
175	SPAGAIN;	406	SPAGAIN;
176	FREETMPS;	407	FREETMPS;
177	LEAVE;	408	LEAVE;
178	}	409	}
179		410
180	/* stop if no progress has been made */	411	/* stop if no progress has been made */
181	if (old_len == grp->length)	412	if (old_len == grp->size)
182	{	413	{
183	SvREFCNT_dec (grp->fh2);	414	SvREFCNT_dec (grp->sv2);
184	grp->fh2 = 0;	415	grp->sv2 = 0;
185	break;	416	break;
186	}	417	}
187	}	418	}
		419
		420	unblock_sig ();
188	}	421	}
189		422
190	static void aio_grp_dec (aio_req grp)	423	static void aio_grp_dec (aio_req grp)
191	{	424	{
192	--grp->length;	425	--grp->size;
193		426
194	/* call feeder, if applicable */	427	/* call feeder, if applicable */
195	aio_grp_feed (grp);	428	aio_grp_feed (grp);
196		429
197	/* finish, if done */	430	/* finish, if done */
198	if (!grp->length && grp->fd)	431	if (!grp->size && grp->int1)
199	{	432	{
		433	block_sig ();
		434
200	req_invoke (grp);	435	if (!req_invoke (grp))
		436	{
		437	req_free (grp);
		438	unblock_sig ();
		439	croak (0);
		440	}
		441
201	req_free (grp);	442	req_free (grp);
		443	unblock_sig ();
202	}	444	}
203	}	445	}
204		446
205	static void poll_wait ()	447	static int req_invoke (aio_req req)
206	{	448	{
207	fd_set rfd;	449	dSP;
208		450
209	while (nreqs)	451	if (req->flags & FLAG_SV1_RO_OFF)
		452	SvREADONLY_off (req->sv1);
		453
		454	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
210	{	455	{
211	aio_req req;	456	ENTER;
212	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */	457	SAVETMPS;
213	pthread_mutex_lock (&reslock);	458	PUSHMARK (SP);
214	#endif	459	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		460
220	if (req)	461	switch (req->type)
221	return;	462	{
		463	case REQ_READDIR:
		464	{
		465	SV *rv = &PL_sv_undef;
222		466
223	FD_ZERO(&rfd);	467	if (req->result >= 0)
224	FD_SET(respipe [0], &rfd);	468	{
		469	int i;
		470	char *buf = req->ptr2;
		471	AV *av = newAV ();
225		472
226	select (respipe [0] + 1, &rfd, 0, 0, 0);	473	av_extend (av, req->result - 1);
		474
		475	for (i = 0; i < req->result; ++i)
		476	{
		477	SV *sv = newSVpv (buf, 0);
		478
		479	av_store (av, i, sv);
		480	buf += SvCUR (sv) + 1;
		481	}
		482
		483	rv = sv_2mortal (newRV_noinc ((SV *)av));
		484	}
		485
		486	PUSHs (rv);
		487	}
		488	break;
		489
		490	case REQ_OPEN:
		491	{
		492	/* convert fd to fh */
		493	SV *fh;
		494
		495	PUSHs (sv_2mortal (newSViv (req->result)));
		496	PUTBACK;
		497	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		498	SPAGAIN;
		499
		500	fh = POPs;
		501	PUSHMARK (SP);
		502	XPUSHs (fh);
		503	}
		504	break;
		505
		506	case REQ_GROUP:
		507	req->int1 = 2; /* mark group as finished */
		508
		509	if (req->sv1)
		510	{
		511	int i;
		512	AV *av = (AV *)req->sv1;
		513
		514	EXTEND (SP, AvFILL (av) + 1);
		515	for (i = 0; i <= AvFILL (av); ++i)
		516	PUSHs (*av_fetch (av, i, 0));
		517	}
		518	break;
		519
		520	case REQ_NOP:
		521	case REQ_BUSY:
		522	break;
		523
		524	case REQ_READLINK:
		525	if (req->result > 0)
		526	{
		527	SvCUR_set (req->sv1, req->result);
		528	*SvEND (req->sv1) = 0;
		529	PUSHs (req->sv1);
		530	}
		531	break;
		532
		533	case REQ_STAT:
		534	case REQ_LSTAT:
		535	case REQ_FSTAT:
		536	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		537	PL_laststatval = req->result;
		538	PL_statcache = *(Stat_t *)(req->ptr2);
		539	PUSHs (sv_2mortal (newSViv (req->result)));
		540	break;
		541
		542	case REQ_READ:
		543	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		544	*SvEND (req->sv1) = 0;
		545	PUSHs (sv_2mortal (newSViv (req->result)));
		546	break;
		547
		548	default:
		549	PUSHs (sv_2mortal (newSViv (req->result)));
		550	break;
		551	}
		552
		553	errno = req->errorno;
		554
		555	PUTBACK;
		556	call_sv (req->callback, G_VOID | G_EVAL);
		557	SPAGAIN;
		558
		559	FREETMPS;
		560	LEAVE;
227	}	561	}
228	}
229		562
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)	563	if (req->grp)
332	{	564	{
333	aio_req grp = req->grp;	565	aio_req grp = req->grp;
334		566
335	/* unlink request */	567	/* unlink request */
…		…
340	grp->grp_first = req->grp_next;	572	grp->grp_first = req->grp_next;
341		573
342	aio_grp_dec (grp);	574	aio_grp_dec (grp);
343	}	575	}
344		576
		577	return !SvTRUE (ERRSV);
		578	}
		579
		580	static void req_free (aio_req req)
		581	{
345	if (req->self)	582	if (req->self)
346	{	583	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	584	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	585	SvREFCNT_dec (req->self);
349	}	586	}
350		587
351	SvREFCNT_dec (req->data);
352	SvREFCNT_dec (req->fh);	588	SvREFCNT_dec (req->fh);
		589	SvREFCNT_dec (req->sv1);
353	SvREFCNT_dec (req->fh2);	590	SvREFCNT_dec (req->sv2);
354	SvREFCNT_dec (req->callback);	591	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);
356		592
357	if (req->type == REQ_READDIR && req->result >= 0)	593	if (req->flags & FLAG_PTR2_FREE)
358	free (req->data2ptr);	594	free (req->ptr2);
359		595
360	Safefree (req);	596	Safefree (req);
361	}	597	}
362		598
		599	static void req_cancel_subs (aio_req grp)
		600	{
		601	aio_req sub;
		602
		603	if (grp->type != REQ_GROUP)
		604	return;
		605
		606	SvREFCNT_dec (grp->sv2);
		607	grp->sv2 = 0;
		608
		609	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		610	req_cancel (sub);
		611	}
		612
363	static void req_cancel (aio_req req)	613	static void req_cancel (aio_req req)
364	{	614	{
365	req->flags |= FLAG_CANCELLED;	615	req->flags |= FLAG_CANCELLED;
366		616
367	if (req->type == REQ_GROUP)	617	req_cancel_subs (req);
368	{
369	aio_req sub;
370
371	for (sub = req->grp_first; sub; sub = sub->grp_next)
372	req_cancel (sub);
373	}
374	}
375
376	static int poll_cb ()
377	{
378	dSP;
379	int count = 0;
380	int do_croak = 0;
381	aio_req req;
382
383	for (;;)
384	{
385	pthread_mutex_lock (&reslock);
386	req = ress;
387
388	if (req)
389	{
390	ress = req->next;
391
392	if (!ress)
393	{
394	/* read any signals sent by the worker threads */
395	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)
397	;
398
399	rese = 0;
400	}
401	}
402
403	pthread_mutex_unlock (&reslock);
404
405	if (!req)
406	break;
407
408	--nreqs;
409
410	if (req->type == REQ_QUIT)
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	}
439
440	return count;
441	}	618	}
442		619
443	static void *aio_proc(void *arg);	620	static void *aio_proc(void *arg);
444		621
445	static void start_thread (void)	622	static void start_thread (void)
446	{	623	{
447	sigset_t fullsigset, oldsigset;	624	sigset_t fullsigset, oldsigset;
448	pthread_t tid;
449	pthread_attr_t attr;	625	pthread_attr_t attr;
		626
		627	worker *wrk = calloc (1, sizeof (worker));
		628
		629	if (!wrk)
		630	croak ("unable to allocate worker thread data");
450		631
451	pthread_attr_init (&attr);	632	pthread_attr_init (&attr);
452	pthread_attr_setstacksize (&attr, STACKSIZE);	633	pthread_attr_setstacksize (&attr, STACKSIZE);
453	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	634	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		635	#ifdef PTHREAD_SCOPE_PROCESS
		636	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		637	#endif
454		638
455	sigfillset (&fullsigset);	639	sigfillset (&fullsigset);
		640
		641	LOCK (wrklock);
456	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	642	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
457		643
458	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	644	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 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	{	645	{
477	reqe->next = req;	646	wrk->prev = &wrk_first;
478	reqe = req;	647	wrk->next = wrk_first.next;
		648	wrk_first.next->prev = wrk;
		649	wrk_first.next = wrk;
		650	++started;
479	}	651	}
480	else	652	else
481	reqe = reqs = req;	653	free (wrk);
482		654
		655	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
		656	UNLOCK (wrklock);
		657	}
		658
		659	static void maybe_start_thread ()
		660	{
		661	if (get_nthreads () >= wanted)
		662	return;
		663
		664	/* todo: maybe use idle here, but might be less exact */
		665	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		666	return;
		667
		668	start_thread ();
		669	}
		670
		671	static void req_send (aio_req req)
		672	{
		673	block_sig ();
		674
		675	++nreqs;
		676
		677	LOCK (reqlock);
		678	++nready;
		679	reqq_push (&req_queue, req);
483	pthread_cond_signal (&reqwait);	680	pthread_cond_signal (&reqwait);
484	pthread_mutex_unlock (&reqlock);	681	UNLOCK (reqlock);
485		682
486	if (nreqs > max_outstanding)	683	unblock_sig ();
487	for (;;)
488	{
489	poll_cb ();
490		684
491	if (nreqs <= max_outstanding)	685	maybe_start_thread ();
492	break;
493
494	poll_wait ();
495	}
496	}	686	}
497		687
498	static void end_thread (void)	688	static void end_thread (void)
499	{	689	{
500	aio_req req;	690	aio_req req;
		691
501	Newz (0, req, 1, aio_cb);	692	Newz (0, req, 1, aio_cb);
		693
502	req->type = REQ_QUIT;	694	req->type = REQ_QUIT;
		695	req->pri = PRI_MAX + PRI_BIAS;
503		696
504	req_send (req);	697	LOCK (reqlock);
		698	reqq_push (&req_queue, req);
		699	pthread_cond_signal (&reqwait);
		700	UNLOCK (reqlock);
		701
		702	LOCK (wrklock);
		703	--started;
		704	UNLOCK (wrklock);
		705	}
		706
		707	static void set_max_idle (int nthreads)
		708	{
		709	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		710	max_idle = nthreads <= 0 ? 1 : nthreads;
		711	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
505	}	712	}
506		713
507	static void min_parallel (int nthreads)	714	static void min_parallel (int nthreads)
508	{	715	{
509	if (wanted < nthreads)	716	if (wanted < nthreads)
510	wanted = nthreads;	717	wanted = nthreads;
511	}	718	}
512		719
513	static void max_parallel (int nthreads)	720	static void max_parallel (int nthreads)
514	{	721	{
515	int cur = started;
516
517	if (wanted > nthreads)	722	if (wanted > nthreads)
518	wanted = nthreads;	723	wanted = nthreads;
519		724
520	while (cur > wanted)	725	while (started > wanted)
		726	end_thread ();
		727	}
		728
		729	static void poll_wait ()
		730	{
		731	fd_set rfd;
		732
		733	while (nreqs)
521	{	734	{
		735	int size;
		736	if (WORDACCESS_UNSAFE) LOCK (reslock);
		737	size = res_queue.size;
		738	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		739
		740	if (size)
		741	return;
		742
522	end_thread ();	743	maybe_start_thread ();
523	cur--;	744
		745	FD_ZERO(&rfd);
		746	FD_SET(respipe [0], &rfd);
		747
		748	select (respipe [0] + 1, &rfd, 0, 0, 0);
524	}	749	}
		750	}
525		751
526	while (started > wanted)	752	static int poll_cb ()
		753	{
		754	dSP;
		755	int count = 0;
		756	int maxreqs = max_poll_reqs;
		757	int do_croak = 0;
		758	struct timeval tv_start, tv_now;
		759	aio_req req;
		760
		761	if (max_poll_time)
		762	gettimeofday (&tv_start, 0);
		763
		764	block_sig ();
		765
		766	for (;;)
527	{	767	{
		768	for (;;)
		769	{
		770	maybe_start_thread ();
		771
		772	LOCK (reslock);
		773	req = reqq_shift (&res_queue);
		774
		775	if (req)
		776	{
		777	--npending;
		778
		779	if (!res_queue.size)
		780	{
		781	/* read any signals sent by the worker threads */
		782	char buf [4];
		783	while (read (respipe [0], buf, 4) == 4)
		784	;
		785	}
		786	}
		787
		788	UNLOCK (reslock);
		789
		790	if (!req)
		791	break;
		792
		793	--nreqs;
		794
		795	if (req->type == REQ_GROUP && req->size)
		796	{
		797	req->int1 = 1; /* mark request as delayed */
		798	continue;
		799	}
		800	else
		801	{
		802	if (!req_invoke (req))
		803	{
		804	req_free (req);
		805	unblock_sig ();
		806	croak (0);
		807	}
		808
		809	count++;
		810	}
		811
		812	req_free (req);
		813
		814	if (maxreqs && !--maxreqs)
		815	break;
		816
		817	if (max_poll_time)
		818	{
		819	gettimeofday (&tv_now, 0);
		820
		821	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		822	break;
		823	}
		824	}
		825
		826	if (nreqs <= max_outstanding)
		827	break;
		828
528	poll_wait ();	829	poll_wait ();
529	poll_cb ();	830
		831	++maxreqs;
530	}	832	}
		833
		834	unblock_sig ();
		835	return count;
531	}	836	}
532		837
533	static void create_pipe ()	838	static void create_pipe ()
534	{	839	{
535	if (pipe (respipe))	840	if (pipe (respipe))
…		…
559	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
560	{	865	{
561	ssize_t res;	866	ssize_t res;
562	off_t ooffset;	867	off_t ooffset;
563		868
564	pthread_mutex_lock (&preadwritelock);	869	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	870	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	871	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);	872	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);	873	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	874	UNLOCK (preadwritelock);
570		875
571	return res;	876	return res;
572	}	877	}
573		878
574	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	879	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
575	{	880	{
576	ssize_t res;	881	ssize_t res;
577	off_t ooffset;	882	off_t ooffset;
578		883
579	pthread_mutex_lock (&preadwritelock);	884	LOCK (preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);	885	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);	886	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);	887	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);	889	UNLOCK (preadwritelock);
585		890
586	return res;	891	return res;
587	}	892	}
588	#endif	893	#endif
589		894
590	#if !HAVE_FDATASYNC	895	#if !HAVE_FDATASYNC
591	# define fdatasync fsync	896	# define fdatasync fsync
592	#endif	897	#endif
593		898
594	#if !HAVE_READAHEAD	899	#if !HAVE_READAHEAD
595	# define readahead aio_readahead	900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
596		901
597	static ssize_t readahead (int fd, off_t offset, size_t count)	902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
598	{	903	{
599	char readahead_buf[4096];	904	dBUF;
600		905
601	while (count > 0)	906	while (count > 0)
602	{	907	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
604		909
605	pread (fd, readahead_buf, len, offset);	910	pread (fd, aio_buf, len, offset);
606	offset += len;	911	offset += len;
607	count -= len;	912	count -= len;
608	}	913	}
609		914
610	errno = 0;	915	errno = 0;
611	}	916	}
		917
612	#endif	918	#endif
613		919
614	#if !HAVE_READDIR_R	920	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r	921	# define readdir_r aio_readdir_r
616		922
…		…
619	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
620	{	926	{
621	struct dirent *e;	927	struct dirent *e;
622	int errorno;	928	int errorno;
623		929
624	pthread_mutex_lock (&readdirlock);	930	LOCK (readdirlock);
625		931
626	e = readdir (dirp);	932	e = readdir (dirp);
627	errorno = errno;	933	errorno = errno;
628		934
629	if (e)	935	if (e)
…		…
632	strcpy (ent->d_name, e->d_name);	938	strcpy (ent->d_name, e->d_name);
633	}	939	}
634	else	940	else
635	*res = 0;	941	*res = 0;
636		942
637	pthread_mutex_unlock (&readdirlock);	943	UNLOCK (readdirlock);
638		944
639	errno = errorno;	945	errno = errorno;
640	return e ? 0 : -1;	946	return e ? 0 : -1;
641	}	947	}
642	#endif	948	#endif
643		949
644	/* sendfile always needs emulation */	950	/* sendfile always needs emulation */
645	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	951	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
646	{	952	{
647	ssize_t res;	953	ssize_t res;
648		954
649	if (!count)	955	if (!count)
650	return 0;	956	return 0;
…		…
661	{	967	{
662	off_t sbytes;	968	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		970
665	if (res < 0 && sbytes)	971	if (res < 0 && sbytes)
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
667	res = sbytes;	973	res = sbytes;
668	}	974	}
669		975
670	# elif __hpux	976	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);	977	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
699	#endif	1005	#endif
700	)	1006	)
701	)	1007	)
702	{	1008	{
703	/* emulate sendfile. this is a major pain in the ass */	1009	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];	1010	dBUF;
		1011
705	res = 0;	1012	res = 0;
706		1013
707	while (count)	1014	while (count)
708	{	1015	{
709	ssize_t cnt;	1016	ssize_t cnt;
710		1017
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
712		1019
713	if (cnt <= 0)	1020	if (cnt <= 0)
714	{	1021	{
715	if (cnt && !res) res = -1;	1022	if (cnt && !res) res = -1;
716	break;	1023	break;
717	}	1024	}
718		1025
719	cnt = write (ofd, buf, cnt);	1026	cnt = write (ofd, aio_buf, cnt);
720		1027
721	if (cnt <= 0)	1028	if (cnt <= 0)
722	{	1029	{
723	if (cnt && !res) res = -1;	1030	if (cnt && !res) res = -1;
724	break;	1031	break;
…		…
732		1039
733	return res;	1040	return res;
734	}	1041	}
735		1042
736	/* read a full directory */	1043	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)	1044	static void scandir_ (aio_req req, worker *self)
738	{	1045	{
739	DIR *dirp = opendir (path);	1046	DIR *dirp;
740	union	1047	union
741	{	1048	{
742	struct dirent d;	1049	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;	1051	} *u;
745	struct dirent *entp;	1052	struct dirent *entp;
746	char *name, *names;	1053	char *name, *names;
747	int memlen = 4096;	1054	int memlen = 4096;
748	int memofs = 0;	1055	int memofs = 0;
749	int res = 0;	1056	int res = 0;
750	int errorno;	1057	int errorno;
751		1058
752	if (!dirp)	1059	LOCK (wrklock);
753	return -1;	1060	self->dirp = dirp = opendir (req->ptr1);
754		1061	self->dbuf = u = malloc (sizeof (*u));
		1062	req->flags |= FLAG_PTR2_FREE;
755	names = malloc (memlen);	1063	req->ptr2 = names = malloc (memlen);
		1064	UNLOCK (wrklock);
		1065
		1066	if (dirp && u && names)
		1067	for (;;)
		1068	{
		1069	errno = 0;
		1070	readdir_r (dirp, &u->d, &entp);
		1071
		1072	if (!entp)
		1073	break;
		1074
		1075	name = entp->d_name;
		1076
		1077	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1078	{
		1079	int len = strlen (name) + 1;
		1080
		1081	res++;
		1082
		1083	while (memofs + len > memlen)
		1084	{
		1085	memlen *= 2;
		1086	LOCK (wrklock);
		1087	req->ptr2 = names = realloc (names, memlen);
		1088	UNLOCK (wrklock);
		1089
		1090	if (!names)
		1091	break;
		1092	}
		1093
		1094	memcpy (names + memofs, name, len);
		1095	memofs += len;
		1096	}
		1097	}
		1098
		1099	if (errno)
		1100	res = -1;
		1101
		1102	req->result = res;
		1103	}
		1104
		1105	/*****************************************************************************/
		1106
		1107	static void *aio_proc (void *thr_arg)
		1108	{
		1109	aio_req req;
		1110	struct timespec ts;
		1111	worker *self = (worker *)thr_arg;
		1112
		1113	/* try to distribute timeouts somewhat evenly */
		1114	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1115	* (1000000000UL / 1024UL);
756		1116
757	for (;;)	1117	for (;;)
758	{	1118	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);	1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
760		1120
761	if (!entp)	1121	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		1122
810	for (;;)	1123	for (;;)
811	{	1124	{
812	req = reqs;	1125	self->req = req = reqq_shift (&req_queue);
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819		1126
820	if (req)	1127	if (req)
821	break;	1128	break;
822		1129
		1130	++idle;
		1131
		1132	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1133	== ETIMEDOUT)
		1134	{
		1135	if (idle > max_idle)
		1136	{
		1137	--idle;
		1138	UNLOCK (reqlock);
		1139	LOCK (wrklock);
		1140	--started;
		1141	UNLOCK (wrklock);
		1142	goto quit;
		1143	}
		1144
		1145	/* we are allowed to idle, so do so without any timeout */
823	pthread_cond_wait (&reqwait, &reqlock);	1146	pthread_cond_wait (&reqwait, &reqlock);
		1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1148	}
		1149
		1150	--idle;
824	}	1151	}
825		1152
826	pthread_mutex_unlock (&reqlock);	1153	--nready;
		1154
		1155	UNLOCK (reqlock);
827		1156
828	errno = 0; /* strictly unnecessary */	1157	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830		1158
831	if (!(req->flags & FLAG_CANCELLED))	1159	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)	1160	switch (req->type)
833	{	1161	{
834	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1162	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
835	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
836		1164
837	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1165	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
838	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
839		1167
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1168	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1169	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
843		1171
844	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
845	case REQ_CLOSE: req->result = close (req->fd); break;	1173	case REQ_CLOSE: req->result = close (req->int1); break;
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1176	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1177	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1178	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1179	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1180	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1181	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
851		1182
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1183	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;	1184	case REQ_FSYNC: req->result = fsync (req->int1); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1185	case REQ_READDIR: scandir_ (req, self); break;
855		1186
856	case REQ_SLEEP:	1187	case REQ_BUSY:
857	{	1188	{
858	struct timeval tv;	1189	struct timeval tv;
859		1190
860	tv.tv_sec = req->fd;	1191	tv.tv_sec = req->int1;
861	tv.tv_usec = req->fd2;	1192	tv.tv_usec = req->int2;
862		1193
863	req->result = select (0, 0, 0, 0, &tv);	1194	req->result = select (0, 0, 0, 0, &tv);
864	}	1195	}
865		1196
866	case REQ_GROUP:	1197	case REQ_GROUP:
867	case REQ_NOP:	1198	case REQ_NOP:
		1199	break;
		1200
868	case REQ_QUIT:	1201	case REQ_QUIT:
869	break;	1202	goto quit;
870		1203
871	default:	1204	default:
872	req->result = ENOSYS;	1205	req->result = ENOSYS;
873	break;	1206	break;
874	}	1207	}
875		1208
876	req->errorno = errno;	1209	req->errorno = errno;
877		1210
878	pthread_mutex_lock (&reslock);	1211	LOCK (reslock);
879		1212
880	req->next = 0;	1213	++npending;
881		1214
882	if (rese)	1215	if (!reqq_push (&res_queue, req))
883	{	1216	{
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 */	1217	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);	1218	write (respipe [1], &respipe, 1);
		1219
		1220	/* optionally signal the main thread asynchronously */
		1221	if (main_sig)
		1222	pthread_kill (main_tid, main_sig);
893	}	1223	}
894		1224
895	pthread_mutex_unlock (&reslock);	1225	self->req = 0;
		1226	worker_clear (self);
		1227
		1228	UNLOCK (reslock);
896	}	1229	}
897	while (type != REQ_QUIT);	1230
		1231	quit:
		1232	LOCK (wrklock);
		1233	worker_free (self);
		1234	UNLOCK (wrklock);
898		1235
899	return 0;	1236	return 0;
900	}	1237	}
901		1238
902	/*****************************************************************************/	1239	/*****************************************************************************/
903		1240
904	static void atfork_prepare (void)	1241	static void atfork_prepare (void)
905	{	1242	{
906	pthread_mutex_lock (&reqlock);	1243	LOCK (wrklock);
907	pthread_mutex_lock (&reslock);	1244	LOCK (reqlock);
		1245	LOCK (reslock);
908	#if !HAVE_PREADWRITE	1246	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);	1247	LOCK (preadwritelock);
910	#endif	1248	#endif
911	#if !HAVE_READDIR_R	1249	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);	1250	LOCK (readdirlock);
913	#endif	1251	#endif
914	}	1252	}
915		1253
916	static void atfork_parent (void)	1254	static void atfork_parent (void)
917	{	1255	{
918	#if !HAVE_READDIR_R	1256	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);	1257	UNLOCK (readdirlock);
920	#endif	1258	#endif
921	#if !HAVE_PREADWRITE	1259	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);	1260	UNLOCK (preadwritelock);
923	#endif	1261	#endif
924	pthread_mutex_unlock (&reslock);	1262	UNLOCK (reslock);
925	pthread_mutex_unlock (&reqlock);	1263	UNLOCK (reqlock);
		1264	UNLOCK (wrklock);
926	}	1265	}
927		1266
928	static void atfork_child (void)	1267	static void atfork_child (void)
929	{	1268	{
930	aio_req prv;	1269	aio_req prv;
931		1270
932	started = 0;	1271	while (prv = reqq_shift (&req_queue))
		1272	req_free (prv);
933		1273
934	while (reqs)	1274	while (prv = reqq_shift (&res_queue))
		1275	req_free (prv);
		1276
		1277	while (wrk_first.next != &wrk_first)
935	{	1278	{
936	prv = reqs;	1279	worker *wrk = wrk_first.next;
937	reqs = prv->next;	1280
		1281	if (wrk->req)
		1282	req_free (wrk->req);
		1283
		1284	worker_clear (wrk);
938	req_free (prv);	1285	worker_free (wrk);
939	}	1286	}
940		1287
941	reqs = reqe = 0;	1288	started = 0;
942		1289	idle = 0;
943	while (ress)	1290	nreqs = 0;
944	{	1291	nready = 0;
945	prv = ress;	1292	npending = 0;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951		1293
952	close (respipe [0]);	1294	close (respipe [0]);
953	close (respipe [1]);	1295	close (respipe [1]);
954	create_pipe ();	1296	create_pipe ();
955		1297
…		…
982	PROTOTYPES: ENABLE	1324	PROTOTYPES: ENABLE
983		1325
984	BOOT:	1326	BOOT:
985	{	1327	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	1328	HV *stash = gv_stashpv ("IO::AIO", 1);
		1329
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1330	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1331	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1332	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1333	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1334	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1335	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1336	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
990		1337
991	create_pipe ();	1338	create_pipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1339	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}	1340	}
994		1341
995	void	1342	void
996	min_parallel (nthreads)	1343	max_poll_reqs (int nreqs)
997	int nthreads
998	PROTOTYPE: $	1344	PROTOTYPE: $
		1345	CODE:
		1346	max_poll_reqs = nreqs;
999		1347
1000	void	1348	void
1001	max_parallel (nthreads)	1349	max_poll_time (double nseconds)
1002	int nthreads
1003	PROTOTYPE: $	1350	PROTOTYPE: $
		1351	CODE:
		1352	max_poll_time = nseconds * AIO_TICKS;
		1353
		1354	void
		1355	min_parallel (int nthreads)
		1356	PROTOTYPE: $
		1357
		1358	void
		1359	max_parallel (int nthreads)
		1360	PROTOTYPE: $
		1361
		1362	void
		1363	max_idle (int nthreads)
		1364	PROTOTYPE: $
		1365	CODE:
		1366	set_max_idle (nthreads);
1004		1367
1005	int	1368	int
1006	max_outstanding (nreqs)	1369	max_outstanding (int maxreqs)
1007	int nreqs	1370	PROTOTYPE: $
1008	PROTOTYPE: $
1009	CODE:	1371	CODE:
1010	RETVAL = max_outstanding;	1372	RETVAL = max_outstanding;
1011	max_outstanding = nreqs;	1373	max_outstanding = maxreqs;
		1374	OUTPUT:
		1375	RETVAL
1012		1376
1013	void	1377	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1378	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1015	SV * pathname	1379	SV8 * pathname
1016	int flags	1380	int flags
1017	int mode	1381	int mode
1018	SV * callback	1382	SV * callback
1019	PROTOTYPE: $$$;$	1383	PROTOTYPE: $$$;$
1020	PPCODE:	1384	PPCODE:
1021	{	1385	{
1022	dREQ;	1386	dREQ;
1023		1387
1024	req->type = REQ_OPEN;	1388	req->type = REQ_OPEN;
1025	req->data = newSVsv (pathname);	1389	req->sv1 = newSVsv (pathname);
1026	req->dataptr = SvPVbyte_nolen (req->data);	1390	req->ptr1 = SvPVbyte_nolen (req->sv1);
1027	req->fd = flags;	1391	req->int1 = flags;
1028	req->mode = mode;	1392	req->mode = mode;
1029		1393
1030	REQ_SEND;	1394	REQ_SEND;
1031	}	1395	}
1032		1396
…		…
1042	PPCODE:	1406	PPCODE:
1043	{	1407	{
1044	dREQ;	1408	dREQ;
1045		1409
1046	req->type = ix;	1410	req->type = ix;
1047	req->fh = newSVsv (fh);	1411	req->fh = newSVsv (fh);
1048	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1412	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1049		1413
1050	REQ_SEND (req);	1414	REQ_SEND (req);
1051	}	1415	}
1052		1416
1053	void	1417	void
1054	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1418	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1055	SV * fh	1419	SV * fh
1056	UV offset	1420	UV offset
1057	UV length	1421	UV length
1058	SV * data	1422	SV8 * data
1059	UV dataoffset	1423	UV dataoffset
1060	SV * callback	1424	SV * callback
1061	ALIAS:	1425	ALIAS:
1062	aio_read = REQ_READ	1426	aio_read = REQ_READ
1063	aio_write = REQ_WRITE	1427	aio_write = REQ_WRITE
1064	PROTOTYPE: $$$$$;$	1428	PROTOTYPE: $$$$$;$
1065	PPCODE:	1429	PPCODE:
1066	{	1430	{
1067	aio_req req;
1068	STRLEN svlen;	1431	STRLEN svlen;
1069	char *svptr = SvPVbyte (data, svlen);	1432	char *svptr = SvPVbyte (data, svlen);
1070		1433
1071	SvUPGRADE (data, SVt_PV);	1434	SvUPGRADE (data, SVt_PV);
1072	SvPOK_on (data);	1435	SvPOK_on (data);
…		…
1084	length = svlen - dataoffset;	1447	length = svlen - dataoffset;
1085	}	1448	}
1086	else	1449	else
1087	{	1450	{
1088	/* read: grow scalar as necessary */	1451	/* read: grow scalar as necessary */
1089	svptr = SvGROW (data, length + dataoffset);	1452	svptr = SvGROW (data, length + dataoffset + 1);
1090	}	1453	}
1091		1454
1092	if (length < 0)	1455	if (length < 0)
1093	croak ("length must not be negative");	1456	croak ("length must not be negative");
1094		1457
1095	{	1458	{
1096	dREQ;	1459	dREQ;
1097		1460
1098	req->type = ix;	1461	req->type = ix;
1099	req->fh = newSVsv (fh);	1462	req->fh = newSVsv (fh);
1100	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1463	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1101	: IoOFP (sv_2io (fh)));	1464	: IoOFP (sv_2io (fh)));
1102	req->offset = offset;	1465	req->offs = offset;
1103	req->length = length;	1466	req->size = length;
1104	req->data = SvREFCNT_inc (data);	1467	req->sv1 = SvREFCNT_inc (data);
1105	req->dataptr = (char *)svptr + dataoffset;	1468	req->ptr1 = (char *)svptr + dataoffset;
		1469	req->stroffset = dataoffset;
1106		1470
1107	if (!SvREADONLY (data))	1471	if (!SvREADONLY (data))
1108	{	1472	{
1109	SvREADONLY_on (data);	1473	SvREADONLY_on (data);
1110	req->data2ptr = (void *)data;	1474	req->flags |= FLAG_SV1_RO_OFF;
1111	}	1475	}
1112		1476
1113	REQ_SEND;	1477	REQ_SEND;
1114	}	1478	}
		1479	}
		1480
		1481	void
		1482	aio_readlink (path,callback=&PL_sv_undef)
		1483	SV8 * path
		1484	SV * callback
		1485	PROTOTYPE: $$;$
		1486	PPCODE:
		1487	{
		1488	SV *data;
		1489	dREQ;
		1490
		1491	data = newSV (NAME_MAX);
		1492	SvPOK_on (data);
		1493
		1494	req->type = REQ_READLINK;
		1495	req->fh = newSVsv (path);
		1496	req->ptr2 = SvPVbyte_nolen (req->fh);
		1497	req->sv1 = data;
		1498	req->ptr1 = SvPVbyte_nolen (data);
		1499
		1500	REQ_SEND;
1115	}	1501	}
1116		1502
1117	void	1503	void
1118	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1504	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1119	SV * out_fh	1505	SV * out_fh
…		…
1125	PPCODE:	1511	PPCODE:
1126	{	1512	{
1127	dREQ;	1513	dREQ;
1128		1514
1129	req->type = REQ_SENDFILE;	1515	req->type = REQ_SENDFILE;
1130	req->fh = newSVsv (out_fh);	1516	req->fh = newSVsv (out_fh);
1131	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1517	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1132	req->fh2 = newSVsv (in_fh);	1518	req->sv2 = newSVsv (in_fh);
1133	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1519	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1134	req->offset = in_offset;	1520	req->offs = in_offset;
1135	req->length = length;	1521	req->size = length;
1136		1522
1137	REQ_SEND;	1523	REQ_SEND;
1138	}	1524	}
1139		1525
1140	void	1526	void
…		…
1147	PPCODE:	1533	PPCODE:
1148	{	1534	{
1149	dREQ;	1535	dREQ;
1150		1536
1151	req->type = REQ_READAHEAD;	1537	req->type = REQ_READAHEAD;
1152	req->fh = newSVsv (fh);	1538	req->fh = newSVsv (fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1539	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1154	req->offset = offset;	1540	req->offs = offset;
1155	req->length = length;	1541	req->size = length;
1156		1542
1157	REQ_SEND;	1543	REQ_SEND;
1158	}	1544	}
1159		1545
1160	void	1546	void
1161	aio_stat (fh_or_path,callback=&PL_sv_undef)	1547	aio_stat (fh_or_path,callback=&PL_sv_undef)
1162	SV * fh_or_path	1548	SV8 * fh_or_path
1163	SV * callback	1549	SV * callback
1164	ALIAS:	1550	ALIAS:
1165	aio_stat = REQ_STAT	1551	aio_stat = REQ_STAT
1166	aio_lstat = REQ_LSTAT	1552	aio_lstat = REQ_LSTAT
1167	PPCODE:	1553	PPCODE:
1168	{	1554	{
1169	dREQ;	1555	dREQ;
1170		1556
1171	New (0, req->statdata, 1, Stat_t);	1557	req->ptr2 = malloc (sizeof (Stat_t));
1172	if (!req->statdata)	1558	if (!req->ptr2)
1173	{	1559	{
1174	req_free (req);	1560	req_free (req);
1175	croak ("out of memory during aio_req->statdata allocation");	1561	croak ("out of memory during aio_stat statdata allocation");
1176	}	1562	}
		1563
		1564	req->flags |= FLAG_PTR2_FREE;
1177		1565
1178	if (SvPOK (fh_or_path))	1566	if (SvPOK (fh_or_path))
1179	{	1567	{
1180	req->type = ix;	1568	req->type = ix;
1181	req->data = newSVsv (fh_or_path);	1569	req->sv1 = newSVsv (fh_or_path);
1182	req->dataptr = SvPVbyte_nolen (req->data);	1570	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	}	1571	}
1184	else	1572	else
1185	{	1573	{
1186	req->type = REQ_FSTAT;	1574	req->type = REQ_FSTAT;
1187	req->fh = newSVsv (fh_or_path);	1575	req->fh = newSVsv (fh_or_path);
1188	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1576	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1189	}	1577	}
1190		1578
1191	REQ_SEND;	1579	REQ_SEND;
1192	}	1580	}
1193		1581
1194	void	1582	void
1195	aio_unlink (pathname,callback=&PL_sv_undef)	1583	aio_unlink (pathname,callback=&PL_sv_undef)
1196	SV * pathname	1584	SV8 * pathname
1197	SV * callback	1585	SV * callback
1198	ALIAS:	1586	ALIAS:
1199	aio_unlink = REQ_UNLINK	1587	aio_unlink = REQ_UNLINK
1200	aio_rmdir = REQ_RMDIR	1588	aio_rmdir = REQ_RMDIR
1201	aio_readdir = REQ_READDIR	1589	aio_readdir = REQ_READDIR
1202	PPCODE:	1590	PPCODE:
1203	{	1591	{
1204	dREQ;	1592	dREQ;
1205		1593
1206	req->type = ix;	1594	req->type = ix;
1207	req->data = newSVsv (pathname);	1595	req->sv1 = newSVsv (pathname);
1208	req->dataptr = SvPVbyte_nolen (req->data);	1596	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1597
		1598	REQ_SEND;
		1599	}
		1600
		1601	void
		1602	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
		1603	SV8 * pathname
		1604	UV mode
		1605	SV * callback
		1606	PPCODE:
		1607	{
		1608	dREQ;
1209		1609
		1610	req->type = REQ_MKDIR;
		1611	req->sv1 = newSVsv (pathname);
		1612	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1613	req->mode = mode;
		1614
1210	REQ_SEND;	1615	REQ_SEND;
1211	}	1616	}
1212		1617
1213	void	1618	void
1214	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1619	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1215	SV * oldpath	1620	SV8 * oldpath
1216	SV * newpath	1621	SV8 * newpath
1217	SV * callback	1622	SV * callback
1218	ALIAS:	1623	ALIAS:
1219	aio_link = REQ_LINK	1624	aio_link = REQ_LINK
1220	aio_symlink = REQ_SYMLINK	1625	aio_symlink = REQ_SYMLINK
1221	aio_rename = REQ_RENAME	1626	aio_rename = REQ_RENAME
1222	PPCODE:	1627	PPCODE:
1223	{	1628	{
1224	dREQ;	1629	dREQ;
1225		1630
1226	req->type = ix;	1631	req->type = ix;
1227	req->fh = newSVsv (oldpath);	1632	req->fh = newSVsv (oldpath);
1228	req->data2ptr = SvPVbyte_nolen (req->fh);	1633	req->ptr2 = SvPVbyte_nolen (req->fh);
1229	req->data = newSVsv (newpath);	1634	req->sv1 = newSVsv (newpath);
1230	req->dataptr = SvPVbyte_nolen (req->data);	1635	req->ptr1 = SvPVbyte_nolen (req->sv1);
1231		1636
1232	REQ_SEND;	1637	REQ_SEND;
1233	}	1638	}
1234		1639
1235	void	1640	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1641	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1237	double delay	1642	SV8 * pathname
		1643	UV mode
		1644	UV dev
1238	SV * callback	1645	SV * callback
1239	PPCODE:	1646	PPCODE:
1240	{	1647	{
1241	dREQ;	1648	dREQ;
		1649
		1650	req->type = REQ_MKNOD;
		1651	req->sv1 = newSVsv (pathname);
		1652	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1653	req->mode = (mode_t)mode;
		1654	req->offs = dev;
		1655
		1656	REQ_SEND;
		1657	}
1242		1658
		1659	void
		1660	aio_busy (delay,callback=&PL_sv_undef)
		1661	double delay
		1662	SV * callback
		1663	PPCODE:
		1664	{
		1665	dREQ;
		1666
1243	req->type = REQ_SLEEP;	1667	req->type = REQ_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1668	req->int1 = delay < 0. ? 0 : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1669	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1246		1670
1247	REQ_SEND;	1671	REQ_SEND;
1248	}	1672	}
1249		1673
1250	void	1674	void
…		…
1254	PPCODE:	1678	PPCODE:
1255	{	1679	{
1256	dREQ;	1680	dREQ;
1257		1681
1258	req->type = REQ_GROUP;	1682	req->type = REQ_GROUP;
		1683
1259	req_send (req);	1684	req_send (req);
1260
1261	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1685	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1262	}	1686	}
1263		1687
1264	void	1688	void
1265	aio_nop (callback=&PL_sv_undef)	1689	aio_nop (callback=&PL_sv_undef)
1266	SV * callback	1690	SV * callback
1267	PPCODE:	1691	PPCODE:
1268	{	1692	{
1269	dREQ;	1693	dREQ;
1270		1694
1271	req->type = REQ_NOP;	1695	req->type = REQ_NOP;
1272		1696
1273	REQ_SEND;	1697	REQ_SEND;
1274	}	1698	}
1275		1699
1276	#if 0	1700	int
1277		1701	aioreq_pri (int pri = 0)
1278	void	1702	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1703	CODE:
		1704	RETVAL = next_pri - PRI_BIAS;
		1705	if (items > 0)
		1706	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1707	if (pri < PRI_MIN) pri = PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1708	if (pri > PRI_MAX) pri = PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1709	next_pri = pri + PRI_BIAS;
		1710	}
		1711	OUTPUT:
		1712	RETVAL
1284		1713
1285	#endif	1714	void
		1715	aioreq_nice (int nice = 0)
		1716	CODE:
		1717	nice = next_pri - nice;
		1718	if (nice < PRI_MIN) nice = PRI_MIN;
		1719	if (nice > PRI_MAX) nice = PRI_MAX;
		1720	next_pri = nice + PRI_BIAS;
1286		1721
1287	void	1722	void
1288	flush ()	1723	flush ()
1289	PROTOTYPE:	1724	PROTOTYPE:
1290	CODE:	1725	CODE:
…		…
1292	{	1727	{
1293	poll_wait ();	1728	poll_wait ();
1294	poll_cb ();	1729	poll_cb ();
1295	}	1730	}
1296		1731
1297	void	1732	int
1298	poll()	1733	poll()
1299	PROTOTYPE:	1734	PROTOTYPE:
1300	CODE:	1735	CODE:
1301	if (nreqs)
1302	{
1303	poll_wait ();	1736	poll_wait ();
1304	poll_cb ();	1737	RETVAL = poll_cb ();
1305	}	1738	OUTPUT:
		1739	RETVAL
1306		1740
1307	int	1741	int
1308	poll_fileno()	1742	poll_fileno()
1309	PROTOTYPE:	1743	PROTOTYPE:
1310	CODE:	1744	CODE:
…		…
1322		1756
1323	void	1757	void
1324	poll_wait()	1758	poll_wait()
1325	PROTOTYPE:	1759	PROTOTYPE:
1326	CODE:	1760	CODE:
1327	if (nreqs)
1328	poll_wait ();	1761	poll_wait ();
		1762
		1763	void
		1764	setsig (int signum = SIGIO)
		1765	PROTOTYPE: ;$
		1766	CODE:
		1767	{
		1768	if (block_sig_level)
		1769	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1770
		1771	LOCK (reslock);
		1772	main_tid = pthread_self ();
		1773	main_sig = signum;
		1774	UNLOCK (reslock);
		1775
		1776	if (main_sig && npending)
		1777	pthread_kill (main_tid, main_sig);
		1778	}
		1779
		1780	void
		1781	aio_block (SV *cb)
		1782	PROTOTYPE: &
		1783	PPCODE:
		1784	{
		1785	int count;
		1786
		1787	block_sig ();
		1788	PUSHMARK (SP);
		1789	PUTBACK;
		1790	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1791	SPAGAIN;
		1792	unblock_sig ();
		1793
		1794	if (SvTRUE (ERRSV))
		1795	croak (0);
		1796
		1797	XSRETURN (count);
		1798	}
1329		1799
1330	int	1800	int
1331	nreqs()	1801	nreqs()
1332	PROTOTYPE:	1802	PROTOTYPE:
1333	CODE:	1803	CODE:
1334	RETVAL = nreqs;	1804	RETVAL = nreqs;
1335	OUTPUT:	1805	OUTPUT:
1336	RETVAL	1806	RETVAL
1337		1807
		1808	int
		1809	nready()
		1810	PROTOTYPE:
		1811	CODE:
		1812	RETVAL = get_nready ();
		1813	OUTPUT:
		1814	RETVAL
		1815
		1816	int
		1817	npending()
		1818	PROTOTYPE:
		1819	CODE:
		1820	RETVAL = get_npending ();
		1821	OUTPUT:
		1822	RETVAL
		1823
		1824	int
		1825	nthreads()
		1826	PROTOTYPE:
		1827	CODE:
		1828	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1829	RETVAL = started;
		1830	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1831	OUTPUT:
		1832	RETVAL
		1833
1338	PROTOTYPES: DISABLE	1834	PROTOTYPES: DISABLE
1339		1835
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1836	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1837
1342	void	1838	void
1343	cancel (aio_req_ornot req)	1839	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1840	CODE:
1346	req_cancel (req);	1841	req_cancel (req);
1347		1842
1348	void	1843	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1844	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1358	PPCODE:	1853	PPCODE:
1359	{	1854	{
1360	int i;	1855	int i;
1361	aio_req req;	1856	aio_req req;
1362		1857
		1858	if (main_sig && !block_sig_level)
		1859	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1860
1363	if (grp->fd == 2)	1861	if (grp->int1 == 2)
1364	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1862	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1365		1863
1366	for (i = 1; i < items; ++i )	1864	for (i = 1; i < items; ++i )
1367	{	1865	{
1368	if (GIMME_V != G_VOID)	1866	if (GIMME_V != G_VOID)
…		…
1370		1868
1371	req = SvAIO_REQ (ST (i));	1869	req = SvAIO_REQ (ST (i));
1372		1870
1373	if (req)	1871	if (req)
1374	{	1872	{
1375	++grp->length;	1873	++grp->size;
1376	req->grp = grp;	1874	req->grp = grp;
1377		1875
1378	req->grp_prev = 0;	1876	req->grp_prev = 0;
1379	req->grp_next = grp->grp_first;	1877	req->grp_next = grp->grp_first;
1380		1878
…		…
1385	}	1883	}
1386	}	1884	}
1387	}	1885	}
1388		1886
1389	void	1887	void
		1888	cancel_subs (aio_req_ornot req)
		1889	CODE:
		1890	req_cancel_subs (req);
		1891
		1892	void
1390	result (aio_req grp, ...)	1893	result (aio_req grp, ...)
1391	CODE:	1894	CODE:
1392	{	1895	{
1393	int i;	1896	int i;
		1897	AV *av;
		1898
		1899	grp->errorno = errno;
		1900
1394	AV *av = newAV ();	1901	av = newAV ();
1395		1902
1396	for (i = 1; i < items; ++i )	1903	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1904	av_push (av, newSVsv (ST (i)));
1398		1905
1399	SvREFCNT_dec (grp->data);	1906	SvREFCNT_dec (grp->sv1);
1400	grp->data = (SV *)av;	1907	grp->sv1 = (SV *)av;
1401	}	1908	}
1402		1909
1403	void	1910	void
		1911	errno (aio_req grp, int errorno = errno)
		1912	CODE:
		1913	grp->errorno = errorno;
		1914
		1915	void
1404	feed_limit (aio_req grp, int limit)	1916	limit (aio_req grp, int limit)
1405	CODE:	1917	CODE:
1406	grp->fd2 = limit;	1918	grp->int2 = limit;
1407	aio_grp_feed (grp);	1919	aio_grp_feed (grp);
1408		1920
1409	void	1921	void
1410	feed (aio_req grp, SV *callback=&PL_sv_undef)	1922	feed (aio_req grp, SV *callback=&PL_sv_undef)
1411	CODE:	1923	CODE:
1412	{	1924	{
1413	SvREFCNT_dec (grp->fh2);	1925	SvREFCNT_dec (grp->sv2);
1414	grp->fh2 = newSVsv (callback);	1926	grp->sv2 = newSVsv (callback);
1415		1927
1416	if (grp->fd2 <= 0)	1928	if (grp->int2 <= 0)
1417	grp->fd2 = 2;	1929	grp->int2 = 2;
1418		1930
1419	aio_grp_feed (grp);	1931	aio_grp_feed (grp);
1420	}	1932	}
1421		1933

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