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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.73 by root, Tue Oct 24 21:26:30 2006 UTC vs.
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC

1	/* solaris */	1	#include "xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "autoconf/config.h"
17		10
18	#include <pthread.h>
19
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>	14	#include <sys/time.h>
23	#include <sys/select.h>	15	#include <sys/select.h>
24	#include <sys/types.h>	16	#include <sys/types.h>
25	#include <sys/stat.h>	17	#include <sys/stat.h>
…		…
42	# else	34	# else
43	# error sendfile support requested but not available	35	# error sendfile support requested but not available
44	# endif	36	# endif
45	#endif	37	#endif
46		38
		39	/* number of seconds after which idle threads exit */
		40	#define IDLE_TIMEOUT 10
		41
47	/* used for struct dirent, AIX doesn't provide it */	42	/* used for struct dirent, AIX doesn't provide it */
48	#ifndef NAME_MAX	43	#ifndef NAME_MAX
49	# define NAME_MAX 4096	44	# define NAME_MAX 4096
50	#endif
51
52	#if __ia64
53	# define STACKSIZE 65536
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	45	#endif
59		46
60	/* buffer size for various temporary buffers */	47	/* buffer size for various temporary buffers */
61	#define AIO_BUFSIZE 65536	48	#define AIO_BUFSIZE 65536
62		49
…		…
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67	UNLOCK (wrklock); \	54	UNLOCK (wrklock); \
68	if (!aio_buf) \	55	if (!aio_buf) \
69	return -1;	56	return -1;
70		57
		58	typedef SV SV8; /* byte-sv, used for argument-checking */
		59
71	enum {	60	enum {
72	REQ_QUIT,	61	REQ_QUIT,
73	REQ_OPEN, REQ_CLOSE,	62	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,	63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,	64	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,	66	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
79	REQ_READDIR,	68	REQ_MKNOD, REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,	69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
81	REQ_GROUP, REQ_NOP,	70	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,	71	REQ_BUSY,
83	};	72	};
84		73
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	74	#define AIO_REQ_KLASS "IO::AIO::REQ"
…		…
87		76
88	typedef struct aio_cb	77	typedef struct aio_cb
89	{	78	{
90	struct aio_cb *volatile next;	79	struct aio_cb *volatile next;
91		80
92	SV *data, *callback;	81	SV *callback, *fh;
93	SV *fh, *fh2;	82	SV *sv1, *sv2;
94	void *dataptr, *data2ptr;	83	void *ptr1, *ptr2;
95	Stat_t *statdata;
96	off_t offset;	84	off_t offs;
97	size_t length;	85	size_t size;
98	ssize_t result;	86	ssize_t result;
99		87
100	STRLEN dataoffset;	88	STRLEN stroffset;
101	int type;	89	int type;
102	int fd, fd2;	90	int int1, int2;
103	int errorno;	91	int errorno;
104	mode_t mode; /* open */	92	mode_t mode; /* open */
105		93
106	unsigned char flags;	94	unsigned char flags;
107	unsigned char pri;	95	unsigned char pri;
…		…
109	SV *self; /* the perl counterpart of this request, if any */	97	SV *self; /* the perl counterpart of this request, if any */
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
111	} aio_cb;	99	} aio_cb;
112		100
113	enum {	101	enum {
114	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) */
115	};	105	};
116		106
117	typedef aio_cb *aio_req;	107	typedef aio_cb *aio_req;
118	typedef aio_cb *aio_req_ornot;	108	typedef aio_cb *aio_req_ornot;
119		109
…		…
124	DEFAULT_PRI = 0,	114	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,	115	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,	116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};	117	};
128		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
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;	165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130		166
131	static int started, wanted;	167	static unsigned int started, idle, wanted;
132	static volatile int nreqs;
133	static int max_outstanding = 1<<30;
134	static int respipe [2];
135		168
136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138	#else
139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140	#endif
141
142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145	/* worker threasd management */	169	/* worker threads management */
146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;	170	static mutex_t wrklock = MUTEX_INIT;
147		171
148	typedef struct worker {	172	typedef struct worker {
149	/* locked by wrklock */	173	/* locked by wrklock */
150	struct worker *prev, *next;	174	struct worker *prev, *next;
151		175
152	pthread_t tid;	176	thread_t tid;
153		177
154	/* locked by reslock, reqlock or wrklock */	178	/* locked by reslock, reqlock or wrklock */
155	aio_req req; /* currently processed request */	179	aio_req req; /* currently processed request */
156	void *dbuf;	180	void *dbuf;
157	DIR *dirp;	181	DIR *dirp;
…		…
180	wrk->prev->next = wrk->next;	204	wrk->prev->next = wrk->next;
181		205
182	free (wrk);	206	free (wrk);
183	}	207	}
184		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;
		212	static int respipe [2];
		213
185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	214	static mutex_t reslock = MUTEX_INIT;
186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	215	static mutex_t reqlock = MUTEX_INIT;
187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	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
		253	#else
		254
		255	# define get_nready() nready
		256	# define get_npending() npending
		257	# define get_nthreads() started
		258
		259	#endif
188		260
189	/*	261	/*
190	* a somewhat faster data structure might be nice, but	262	* a somewhat faster data structure might be nice, but
191	* with 8 priorities this actually needs <20 insns	263	* with 8 priorities this actually needs <20 insns
192	* per shift, the most expensive operation.	264	* per shift, the most expensive operation.
…		…
238	}	310	}
239		311
240	abort ();	312	abort ();
241	}	313	}
242		314
		315	static int poll_cb ();
243	static void req_invoke (aio_req req);	316	static int req_invoke (aio_req req);
244	static void req_free (aio_req req);	317	static void req_free (aio_req req);
245	static void req_cancel (aio_req req);	318	static void req_cancel (aio_req req);
246		319
247	/* must be called at most once */	320	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	321	static SV *req_sv (aio_req req, const char *klass)
…		…
268	return mg ? (aio_req)mg->mg_ptr : 0;	341	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	342	}
270		343
271	static void aio_grp_feed (aio_req grp)	344	static void aio_grp_feed (aio_req grp)
272	{	345	{
		346	block_sig ();
		347
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
274	{	349	{
275	int old_len = grp->length;	350	int old_len = grp->size;
276		351
277	if (grp->fh2 && SvOK (grp->fh2))	352	if (grp->sv2 && SvOK (grp->sv2))
278	{	353	{
279	dSP;	354	dSP;
280		355
281	ENTER;	356	ENTER;
282	SAVETMPS;	357	SAVETMPS;
283	PUSHMARK (SP);	358	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285	PUTBACK;	360	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	362	SPAGAIN;
288	FREETMPS;	363	FREETMPS;
289	LEAVE;	364	LEAVE;
290	}	365	}
291		366
292	/* stop if no progress has been made */	367	/* stop if no progress has been made */
293	if (old_len == grp->length)	368	if (old_len == grp->size)
294	{	369	{
295	SvREFCNT_dec (grp->fh2);	370	SvREFCNT_dec (grp->sv2);
296	grp->fh2 = 0;	371	grp->sv2 = 0;
297	break;	372	break;
298	}	373	}
299	}	374	}
		375
		376	unblock_sig ();
300	}	377	}
301		378
302	static void aio_grp_dec (aio_req grp)	379	static void aio_grp_dec (aio_req grp)
303	{	380	{
304	--grp->length;	381	--grp->size;
305		382
306	/* call feeder, if applicable */	383	/* call feeder, if applicable */
307	aio_grp_feed (grp);	384	aio_grp_feed (grp);
308		385
309	/* finish, if done */	386	/* finish, if done */
310	if (!grp->length && grp->fd)	387	if (!grp->size && grp->int1)
311	{	388	{
		389	block_sig ();
		390
312	req_invoke (grp);	391	if (!req_invoke (grp))
		392	{
		393	req_free (grp);
		394	unblock_sig ();
		395	croak (0);
		396	}
		397
313	req_free (grp);	398	req_free (grp);
		399	unblock_sig ();
314	}	400	}
315	}	401	}
316		402
317	static void poll_wait ()
318	{
319	fd_set rfd;
320
321	while (nreqs)
322	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)	403	static int req_invoke (aio_req req)
343	{	404	{
344	dSP;	405	dSP;
		406
		407	if (req->flags & FLAG_SV1_RO_OFF)
		408	SvREADONLY_off (req->sv1);
345		409
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347	{	411	{
348	errno = req->errorno;
349
350	ENTER;	412	ENTER;
351	SAVETMPS;	413	SAVETMPS;
352	PUSHMARK (SP);	414	PUSHMARK (SP);
353	EXTEND (SP, 1);	415	EXTEND (SP, 1);
354		416
…		…
359	SV *rv = &PL_sv_undef;	421	SV *rv = &PL_sv_undef;
360		422
361	if (req->result >= 0)	423	if (req->result >= 0)
362	{	424	{
363	int i;	425	int i;
364	char *buf = req->data2ptr;	426	char *buf = req->ptr2;
365	AV *av = newAV ();	427	AV *av = newAV ();
366		428
367	av_extend (av, req->result - 1);	429	av_extend (av, req->result - 1);
368		430
369	for (i = 0; i < req->result; ++i)	431	for (i = 0; i < req->result; ++i)
…		…
389	PUSHs (sv_2mortal (newSViv (req->result)));	451	PUSHs (sv_2mortal (newSViv (req->result)));
390	PUTBACK;	452	PUTBACK;
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
392	SPAGAIN;	454	SPAGAIN;
393		455
394	fh = SvREFCNT_inc (POPs);	456	fh = POPs;
395
396	PUSHMARK (SP);	457	PUSHMARK (SP);
397	XPUSHs (sv_2mortal (fh));	458	XPUSHs (fh);
398	}	459	}
399	break;	460	break;
400		461
401	case REQ_GROUP:	462	case REQ_GROUP:
402	req->fd = 2; /* mark group as finished */	463	req->int1 = 2; /* mark group as finished */
403		464
404	if (req->data)	465	if (req->sv1)
405	{	466	{
406	int i;	467	int i;
407	AV *av = (AV *)req->data;	468	AV *av = (AV *)req->sv1;
408		469
409	EXTEND (SP, AvFILL (av) + 1);	470	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	471	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	472	PUSHs (*av_fetch (av, i, 0));
412	}	473	}
…		…
414		475
415	case REQ_NOP:	476	case REQ_NOP:
416	case REQ_BUSY:	477	case REQ_BUSY:
417	break;	478	break;
418		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
419	default:	504	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	505	PUSHs (sv_2mortal (newSViv (req->result)));
421	break;	506	break;
422	}	507	}
423		508
		509	errno = req->errorno;
424		510
425	PUTBACK;	511	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	512	call_sv (req->callback, G_VOID | G_EVAL);
427	SPAGAIN;	513	SPAGAIN;
428		514
…		…
442	grp->grp_first = req->grp_next;	528	grp->grp_first = req->grp_next;
443		529
444	aio_grp_dec (grp);	530	aio_grp_dec (grp);
445	}	531	}
446		532
447	if (SvTRUE (ERRSV))	533	return !SvTRUE (ERRSV);
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	534	}
453		535
454	static void req_free (aio_req req)	536	static void req_free (aio_req req)
455	{	537	{
456	if (req->self)	538	if (req->self)
457	{	539	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
460	}	542	}
461		543
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
		545	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467		548
468	if (req->type == REQ_READDIR)	549	if (req->flags & FLAG_PTR2_FREE)
469	free (req->data2ptr);	550	free (req->ptr2);
470		551
471	Safefree (req);	552	Safefree (req);
472	}	553	}
473		554
474	static void req_cancel_subs (aio_req grp)	555	static void req_cancel_subs (aio_req grp)
…		…
476	aio_req sub;	557	aio_req sub;
477		558
478	if (grp->type != REQ_GROUP)	559	if (grp->type != REQ_GROUP)
479	return;	560	return;
480		561
481	SvREFCNT_dec (grp->fh2);	562	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	563	grp->sv2 = 0;
483		564
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	565	for (sub = grp->grp_first; sub; sub = sub->grp_next)
485	req_cancel (sub);	566	req_cancel (sub);
486	}	567	}
487		568
…		…
490	req->flags |= FLAG_CANCELLED;	571	req->flags |= FLAG_CANCELLED;
491		572
492	req_cancel_subs (req);	573	req_cancel_subs (req);
493	}	574	}
494		575
495	static int poll_cb ()
496	{
497	dSP;
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501
502	for (;;)
503	{
504	LOCK (reslock);
505	req = reqq_shift (&res_queue);
506
507	if (req)
508	{
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;
522
523	--nreqs;
524
525	if (req->type == REQ_QUIT)
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}
554
555	return count;
556	}
557
558	static void *aio_proc(void *arg);	576	static void *aio_proc(void *arg);
559		577
560	static void start_thread (void)	578	static void start_thread (void)
561	{	579	{
562	sigset_t fullsigset, oldsigset;
563	pthread_attr_t attr;
564
565	worker *wrk = calloc (1, sizeof (worker));	580	worker *wrk = calloc (1, sizeof (worker));
566		581
567	if (!wrk)	582	if (!wrk)
568	croak ("unable to allocate worker thread data");	583	croak ("unable to allocate worker thread data");
569		584
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);	585	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578		586
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
580	{	588	{
581	wrk->prev = &wrk_first;	589	wrk->prev = &wrk_first;
582	wrk->next = wrk_first.next;	590	wrk->next = wrk_first.next;
583	wrk_first.next->prev = wrk;	591	wrk_first.next->prev = wrk;
584	wrk_first.next = wrk;	592	wrk_first.next = wrk;
585	started++;	593	++started;
586	}	594	}
587	else	595	else
588	free (wrk);	596	free (wrk);
589		597
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);	598	UNLOCK (wrklock);
592	}	599	}
593		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
594	static void req_send (aio_req req)	613	static void req_send (aio_req req)
595	{	614	{
596	while (started < wanted && nreqs >= started)	615	block_sig ();
597	start_thread ();
598		616
599	++nreqs;	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;
600		638
601	LOCK (reqlock);	639	LOCK (reqlock);
602	reqq_push (&req_queue, req);	640	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);	641	COND_SIGNAL (reqwait);
604	UNLOCK (reqlock);	642	UNLOCK (reqlock);
605		643
606	if (nreqs > max_outstanding)	644	LOCK (wrklock);
607	for (;;)	645	--started;
608	{	646	UNLOCK (wrklock);
609	poll_cb ();
610
611	if (nreqs <= max_outstanding)
612	break;
613
614	poll_wait ();
615	}
616	}	647	}
617		648
618	static void end_thread (void)	649	static void set_max_idle (int nthreads)
619	{	650	{
620	aio_req req;	651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
621		652	max_idle = nthreads <= 0 ? 1 : nthreads;
622	Newz (0, req, 1, aio_cb);	653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
623
624	req->type = REQ_QUIT;
625	req->pri = PRI_MAX + PRI_BIAS;
626
627	req_send (req);
628	}	654	}
629		655
630	static void min_parallel (int nthreads)	656	static void min_parallel (int nthreads)
631	{	657	{
632	if (wanted < nthreads)	658	if (wanted < nthreads)
633	wanted = nthreads;	659	wanted = nthreads;
634	}	660	}
635		661
636	static void max_parallel (int nthreads)	662	static void max_parallel (int nthreads)
637	{	663	{
638	int cur = started;
639
640	if (wanted > nthreads)	664	if (wanted > nthreads)
641	wanted = nthreads;	665	wanted = nthreads;
642		666
643	while (cur > wanted)	667	while (started > wanted)
		668	end_thread ();
		669	}
		670
		671	static void poll_wait ()
		672	{
		673	fd_set rfd;
		674
		675	while (nreqs)
644	{	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
645	end_thread ();	685	maybe_start_thread ();
646	cur--;	686
		687	FD_ZERO(&rfd);
		688	FD_SET(respipe [0], &rfd);
		689
		690	select (respipe [0] + 1, &rfd, 0, 0, 0);
647	}	691	}
		692	}
648		693
649	while (started > wanted)	694	static int poll_cb ()
		695	{
		696	dSP;
		697	int count = 0;
		698	int maxreqs = max_poll_reqs;
		699	int do_croak = 0;
		700	struct timeval tv_start, tv_now;
		701	aio_req req;
		702
		703	if (max_poll_time)
		704	gettimeofday (&tv_start, 0);
		705
		706	block_sig ();
		707
		708	for (;;)
650	{	709	{
		710	for (;;)
		711	{
		712	maybe_start_thread ();
		713
		714	LOCK (reslock);
		715	req = reqq_shift (&res_queue);
		716
		717	if (req)
		718	{
		719	--npending;
		720
		721	if (!res_queue.size)
		722	{
		723	/* read any signals sent by the worker threads */
		724	char buf [4];
		725	while (read (respipe [0], buf, 4) == 4)
		726	;
		727	}
		728	}
		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)
		764	break;
		765	}
		766	}
		767
		768	if (nreqs <= max_outstanding)
		769	break;
		770
651	poll_wait ();	771	poll_wait ();
652	poll_cb ();	772
		773	++maxreqs;
653	}	774	}
		775
		776	unblock_sig ();
		777	return count;
654	}	778	}
655		779
656	static void create_pipe ()	780	static void create_pipe ()
657	{	781	{
658	if (pipe (respipe))	782	if (pipe (respipe))
…		…
675	/*	799	/*
676	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
677	* 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,
678	* but that's your problem, not mine.	802	* but that's your problem, not mine.
679	*/	803	*/
680	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
681		805
682	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)
683	{	807	{
684	ssize_t res;	808	ssize_t res;
685	off_t ooffset;	809	off_t ooffset;
…		…
713	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
714	# define fdatasync fsync	838	# define fdatasync fsync
715	#endif	839	#endif
716		840
717	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
718	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
719		843
720	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)
721	{	845	{
722	dBUF;	846	dBUF;
723		847
724	while (count > 0)	848	while (count > 0)
725	{	849	{
…		…
730	count -= len;	854	count -= len;
731	}	855	}
732		856
733	errno = 0;	857	errno = 0;
734	}	858	}
		859
735	#endif	860	#endif
736		861
737	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
738	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
739		864
740	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
741		866
742	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)
743	{	868	{
744	struct dirent *e;	869	struct dirent *e;
745	int errorno;	870	int errorno;
…		…
784	{	909	{
785	off_t sbytes;	910	off_t sbytes;
786	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
787		912
788	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
789	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
790	res = sbytes;	915	res = sbytes;
791	}	916	}
792		917
793	# elif __hpux	918	# elif __hpux
794	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
872	int memofs = 0;	997	int memofs = 0;
873	int res = 0;	998	int res = 0;
874	int errorno;	999	int errorno;
875		1000
876	LOCK (wrklock);	1001	LOCK (wrklock);
877	self->dirp = dirp = opendir (req->dataptr);	1002	self->dirp = dirp = opendir (req->ptr1);
878	self->dbuf = u = malloc (sizeof (*u));	1003	self->dbuf = u = malloc (sizeof (*u));
		1004	req->flags |= FLAG_PTR2_FREE;
		1005	req->ptr2 = names = malloc (memlen);
879	UNLOCK (wrklock);	1006	UNLOCK (wrklock);
880
881	req->data2ptr = names = malloc (memlen);
882		1007
883	if (dirp && u && names)	1008	if (dirp && u && names)
884	for (;;)	1009	for (;;)
885	{	1010	{
886	errno = 0;	1011	errno = 0;
…		…
899		1024
900	while (memofs + len > memlen)	1025	while (memofs + len > memlen)
901	{	1026	{
902	memlen *= 2;	1027	memlen *= 2;
903	LOCK (wrklock);	1028	LOCK (wrklock);
904	req->data2ptr = names = realloc (names, memlen);	1029	req->ptr2 = names = realloc (names, memlen);
905	UNLOCK (wrklock);	1030	UNLOCK (wrklock);
906		1031
907	if (!names)	1032	if (!names)
908	break;	1033	break;
909	}	1034	}
…		…
922	/*****************************************************************************/	1047	/*****************************************************************************/
923		1048
924	static void *aio_proc (void *thr_arg)	1049	static void *aio_proc (void *thr_arg)
925	{	1050	{
926	aio_req req;	1051	aio_req req;
927	int type;	1052	struct timespec ts;
928	worker *self = (worker *)thr_arg;	1053	worker *self = (worker *)thr_arg;
929		1054
930	do	1055	/* try to distribute timeouts somewhat evenly */
		1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1057	* (1000000000UL / 1024UL);
		1058
		1059	for (;;)
931	{	1060	{
		1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1062
932	LOCK (reqlock);	1063	LOCK (reqlock);
933		1064
934	for (;;)	1065	for (;;)
935	{	1066	{
936	self->req = req = reqq_shift (&req_queue);	1067	self->req = req = reqq_shift (&req_queue);
937		1068
938	if (req)	1069	if (req)
939	break;	1070	break;
940		1071
941	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;
942	}	1093	}
		1094
		1095	--nready;
943		1096
944	UNLOCK (reqlock);	1097	UNLOCK (reqlock);
945		1098
946	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
947	type = req->type; /* remember type for QUIT check */
948		1100
949	if (!(req->flags & FLAG_CANCELLED))	1101	if (!(req->flags & FLAG_CANCELLED))
950	switch (type)	1102	switch (req->type)
951	{	1103	{
952	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;
953	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;
954		1106
955	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;
956	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;	1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
957		1109
958	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;
959	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;
960	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;
961		1113
962	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;
963	case REQ_CLOSE: req->result = close (req->fd); break;	1115	case REQ_CLOSE: req->result = close (req->int1); break;
964	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
965	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;
966	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
967	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
968	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;
969		1124
970	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
971	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
972	case REQ_READDIR: scandir_ (req, self); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
973		1128
974	case REQ_BUSY:	1129	case REQ_BUSY:
975	{	1130	{
976	struct timeval tv;	1131	struct timeval tv;
977		1132
978	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
979	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
980		1135
981	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
982	}	1137	}
983		1138
984	case REQ_GROUP:	1139	case REQ_GROUP:
985	case REQ_NOP:	1140	case REQ_NOP:
		1141	break;
		1142
986	case REQ_QUIT:	1143	case REQ_QUIT:
987	break;	1144	goto quit;
988		1145
989	default:	1146	default:
990	req->result = ENOSYS;	1147	req->result = ENOSYS;
991	break;	1148	break;
992	}	1149	}
993		1150
994	req->errorno = errno;	1151	req->errorno = errno;
995		1152
996	LOCK (reslock);	1153	LOCK (reslock);
997		1154
		1155	++npending;
		1156
998	if (!reqq_push (&res_queue, req))	1157	if (!reqq_push (&res_queue, req))
		1158	{
999	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
1000	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);
		1165	}
1001		1166
1002	self->req = 0;	1167	self->req = 0;
1003	worker_clear (self);	1168	worker_clear (self);
1004		1169
1005	UNLOCK (reslock);	1170	UNLOCK (reslock);
1006	}	1171	}
1007	while (type != REQ_QUIT);
1008		1172
		1173	quit:
1009	LOCK (wrklock);	1174	LOCK (wrklock);
1010	worker_free (self);	1175	worker_free (self);
1011	UNLOCK (wrklock);	1176	UNLOCK (wrklock);
1012		1177
1013	return 0;	1178	return 0;
…		…
1060		1225
1061	worker_clear (wrk);	1226	worker_clear (wrk);
1062	worker_free (wrk);	1227	worker_free (wrk);
1063	}	1228	}
1064		1229
1065	started = 0;	1230	started = 0;
		1231	idle = 0;
1066	nreqs = 0;	1232	nreqs = 0;
		1233	nready = 0;
		1234	npending = 0;
1067		1235
1068	close (respipe [0]);	1236	close (respipe [0]);
1069	close (respipe [1]);	1237	close (respipe [1]);
1070	create_pipe ();	1238	create_pipe ();
1071		1239
…		…
1098	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
1099		1267
1100	BOOT:	1268	BOOT:
1101	{	1269	{
1102	HV *stash = gv_stashpv ("IO::AIO", 1);	1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
1103	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1104	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1105	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));
1106		1279
1107	create_pipe ();	1280	create_pipe ();
1108	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
1109	}	1282	}
1110		1283
1111	void	1284	void
1112	min_parallel (nthreads)	1285	max_poll_reqs (int nreqs)
1113	int nthreads
1114	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
1115		1289
1116	void	1290	void
1117	max_parallel (nthreads)	1291	max_poll_time (double nseconds)
1118	int nthreads
1119	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);
1120		1309
1121	int	1310	int
1122	max_outstanding (nreqs)	1311	max_outstanding (int maxreqs)
1123	int nreqs	1312	PROTOTYPE: $
1124	PROTOTYPE: $
1125	CODE:	1313	CODE:
1126	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
1127	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
1128		1318
1129	void	1319	void
1130	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1131	SV * pathname	1321	SV8 * pathname
1132	int flags	1322	int flags
1133	int mode	1323	int mode
1134	SV * callback	1324	SV * callback
1135	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
1136	PPCODE:	1326	PPCODE:
1137	{	1327	{
1138	dREQ;	1328	dREQ;
1139		1329
1140	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
1141	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
1142	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
1143	req->fd = flags;	1333	req->int1 = flags;
1144	req->mode = mode;	1334	req->mode = mode;
1145		1335
1146	REQ_SEND;	1336	REQ_SEND;
1147	}	1337	}
1148		1338
…		…
1158	PPCODE:	1348	PPCODE:
1159	{	1349	{
1160	dREQ;	1350	dREQ;
1161		1351
1162	req->type = ix;	1352	req->type = ix;
1163	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
1164	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1165		1355
1166	REQ_SEND (req);	1356	REQ_SEND (req);
1167	}	1357	}
1168		1358
1169	void	1359	void
1170	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1171	SV * fh	1361	SV * fh
1172	UV offset	1362	UV offset
1173	UV length	1363	UV length
1174	SV * data	1364	SV8 * data
1175	UV dataoffset	1365	UV dataoffset
1176	SV * callback	1366	SV * callback
1177	ALIAS:	1367	ALIAS:
1178	aio_read = REQ_READ	1368	aio_read = REQ_READ
1179	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
1180	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
1181	PPCODE:	1371	PPCODE:
1182	{	1372	{
1183	aio_req req;
1184	STRLEN svlen;	1373	STRLEN svlen;
1185	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
1186		1375
1187	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
1188	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
1200	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
1201	}	1390	}
1202	else	1391	else
1203	{	1392	{
1204	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
1205	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
1206	}	1395	}
1207		1396
1208	if (length < 0)	1397	if (length < 0)
1209	croak ("length must not be negative");	1398	croak ("length must not be negative");
1210		1399
1211	{	1400	{
1212	dREQ;	1401	dREQ;
1213		1402
1214	req->type = ix;	1403	req->type = ix;
1215	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
1216	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1217	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
1218	req->offset = offset;	1407	req->offs = offset;
1219	req->length = length;	1408	req->size = length;
1220	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
1221	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
1222		1412
1223	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
1224	{	1414	{
1225	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
1226	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
1227	}	1417	}
1228		1418
1229	REQ_SEND;	1419	REQ_SEND;
1230	}	1420	}
		1421	}
		1422
		1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		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;
1231	}	1443	}
1232		1444
1233	void	1445	void
1234	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)
1235	SV * out_fh	1447	SV * out_fh
…		…
1241	PPCODE:	1453	PPCODE:
1242	{	1454	{
1243	dREQ;	1455	dREQ;
1244		1456
1245	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
1246	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
1247	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1248	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
1249	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1250	req->offset = in_offset;	1462	req->offs = in_offset;
1251	req->length = length;	1463	req->size = length;
1252		1464
1253	REQ_SEND;	1465	REQ_SEND;
1254	}	1466	}
1255		1467
1256	void	1468	void
…		…
1263	PPCODE:	1475	PPCODE:
1264	{	1476	{
1265	dREQ;	1477	dREQ;
1266		1478
1267	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
1268	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
1269	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1270	req->offset = offset;	1482	req->offs = offset;
1271	req->length = length;	1483	req->size = length;
1272		1484
1273	REQ_SEND;	1485	REQ_SEND;
1274	}	1486	}
1275		1487
1276	void	1488	void
1277	aio_stat (fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
1278	SV * fh_or_path	1490	SV8 * fh_or_path
1279	SV * callback	1491	SV * callback
1280	ALIAS:	1492	ALIAS:
1281	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
1282	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
1283	PPCODE:	1495	PPCODE:
1284	{	1496	{
1285	dREQ;	1497	dREQ;
1286		1498
1287	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
1288	if (!req->statdata)	1500	if (!req->ptr2)
1289	{	1501	{
1290	req_free (req);	1502	req_free (req);
1291	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
1292	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
1293		1507
1294	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
1295	{	1509	{
1296	req->type = ix;	1510	req->type = ix;
1297	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
1298	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1299	}	1513	}
1300	else	1514	else
1301	{	1515	{
1302	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
1303	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
1304	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1305	}	1519	}
1306		1520
1307	REQ_SEND;	1521	REQ_SEND;
1308	}	1522	}
1309		1523
1310	void	1524	void
1311	aio_unlink (pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
1312	SV * pathname	1526	SV8 * pathname
1313	SV * callback	1527	SV * callback
1314	ALIAS:	1528	ALIAS:
1315	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
1316	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
1317	aio_readdir = REQ_READDIR	1531	aio_readdir = REQ_READDIR
1318	PPCODE:	1532	PPCODE:
1319	{	1533	{
1320	dREQ;	1534	dREQ;
1321		1535
1322	req->type = ix;	1536	req->type = ix;
1323	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
1324	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;
1325		1551
		1552	req->type = REQ_MKDIR;
		1553	req->sv1 = newSVsv (pathname);
		1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1555	req->mode = mode;
		1556
1326	REQ_SEND;	1557	REQ_SEND;
1327	}	1558	}
1328		1559
1329	void	1560	void
1330	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1331	SV * oldpath	1562	SV8 * oldpath
1332	SV * newpath	1563	SV8 * newpath
1333	SV * callback	1564	SV * callback
1334	ALIAS:	1565	ALIAS:
1335	aio_link = REQ_LINK	1566	aio_link = REQ_LINK
1336	aio_symlink = REQ_SYMLINK	1567	aio_symlink = REQ_SYMLINK
1337	aio_rename = REQ_RENAME	1568	aio_rename = REQ_RENAME
1338	PPCODE:	1569	PPCODE:
1339	{	1570	{
1340	dREQ;	1571	dREQ;
1341		1572
1342	req->type = ix;	1573	req->type = ix;
1343	req->fh = newSVsv (oldpath);	1574	req->fh = newSVsv (oldpath);
1344	req->data2ptr = SvPVbyte_nolen (req->fh);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1345	req->data = newSVsv (newpath);	1576	req->sv1 = newSVsv (newpath);
1346	req->dataptr = SvPVbyte_nolen (req->data);	1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1347		1578
1348	REQ_SEND;	1579	REQ_SEND;
1349	}	1580	}
1350		1581
1351	void	1582	void
		1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1584	SV8 * pathname
		1585	UV mode
		1586	UV dev
		1587	SV * callback
		1588	PPCODE:
		1589	{
		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	}
		1600
		1601	void
1352	aio_busy (delay,callback=&PL_sv_undef)	1602	aio_busy (delay,callback=&PL_sv_undef)
1353	double delay	1603	double delay
1354	SV * callback	1604	SV * callback
1355	PPCODE:	1605	PPCODE:
1356	{	1606	{
1357	dREQ;	1607	dREQ;
1358		1608
1359	req->type = REQ_BUSY;	1609	req->type = REQ_BUSY;
1360	req->fd = delay < 0. ? 0 : delay;	1610	req->int1 = delay < 0. ? 0 : delay;
1361	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1362		1612
1363	REQ_SEND;	1613	REQ_SEND;
1364	}	1614	}
1365		1615
1366	void	1616	void
…		…
1370	PPCODE:	1620	PPCODE:
1371	{	1621	{
1372	dREQ;	1622	dREQ;
1373		1623
1374	req->type = REQ_GROUP;	1624	req->type = REQ_GROUP;
		1625
1375	req_send (req);	1626	req_send (req);
1376
1377	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1378	}	1628	}
1379		1629
1380	void	1630	void
1381	aio_nop (callback=&PL_sv_undef)	1631	aio_nop (callback=&PL_sv_undef)
1382	SV * callback	1632	SV * callback
1383	PPCODE:	1633	PPCODE:
1384	{	1634	{
1385	dREQ;	1635	dREQ;
1386		1636
1387	req->type = REQ_NOP;	1637	req->type = REQ_NOP;
1388		1638
1389	REQ_SEND;	1639	REQ_SEND;
1390	}	1640	}
1391		1641
1392	void	1642	int
1393	aioreq_pri (int pri = DEFAULT_PRI)	1643	aioreq_pri (int pri = 0)
1394	CODE:	1644	PROTOTYPE: ;$
		1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
1395	if (pri < PRI_MIN) pri = PRI_MIN;	1649	if (pri < PRI_MIN) pri = PRI_MIN;
1396	if (pri > PRI_MAX) pri = PRI_MAX;	1650	if (pri > PRI_MAX) pri = PRI_MAX;
1397	next_pri = pri + PRI_BIAS;	1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
1398		1655
1399	void	1656	void
1400	aioreq_nice (int nice = 0)	1657	aioreq_nice (int nice = 0)
1401	CODE:	1658	CODE:
1402	nice = next_pri - nice;	1659	nice = next_pri - nice;
1403	if (nice < PRI_MIN) nice = PRI_MIN;	1660	if (nice < PRI_MIN) nice = PRI_MIN;
1404	if (nice > PRI_MAX) nice = PRI_MAX;	1661	if (nice > PRI_MAX) nice = PRI_MAX;
1405	next_pri = nice + PRI_BIAS;	1662	next_pri = nice + PRI_BIAS;
1406		1663
1407	void	1664	void
1408	flush ()	1665	flush ()
1409	PROTOTYPE:	1666	PROTOTYPE:
1410	CODE:	1667	CODE:
…		…
1412	{	1669	{
1413	poll_wait ();	1670	poll_wait ();
1414	poll_cb ();	1671	poll_cb ();
1415	}	1672	}
1416		1673
1417	void	1674	int
1418	poll()	1675	poll()
1419	PROTOTYPE:	1676	PROTOTYPE:
1420	CODE:	1677	CODE:
1421	if (nreqs)
1422	{
1423	poll_wait ();	1678	poll_wait ();
1424	poll_cb ();	1679	RETVAL = poll_cb ();
1425	}	1680	OUTPUT:
		1681	RETVAL
1426		1682
1427	int	1683	int
1428	poll_fileno()	1684	poll_fileno()
1429	PROTOTYPE:	1685	PROTOTYPE:
1430	CODE:	1686	CODE:
…		…
1442		1698
1443	void	1699	void
1444	poll_wait()	1700	poll_wait()
1445	PROTOTYPE:	1701	PROTOTYPE:
1446	CODE:	1702	CODE:
1447	if (nreqs)
1448	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	}
1449		1741
1450	int	1742	int
1451	nreqs()	1743	nreqs()
1452	PROTOTYPE:	1744	PROTOTYPE:
1453	CODE:	1745	CODE:
1454	RETVAL = nreqs;	1746	RETVAL = nreqs;
1455	OUTPUT:	1747	OUTPUT:
1456	RETVAL	1748	RETVAL
1457		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
1458	PROTOTYPES: DISABLE	1776	PROTOTYPES: DISABLE
1459		1777
1460	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1461		1779
1462	void	1780	void
…		…
1477	PPCODE:	1795	PPCODE:
1478	{	1796	{
1479	int i;	1797	int i;
1480	aio_req req;	1798	aio_req req;
1481		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
1482	if (grp->fd == 2)	1803	if (grp->int1 == 2)
1483	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");
1484		1805
1485	for (i = 1; i < items; ++i )	1806	for (i = 1; i < items; ++i )
1486	{	1807	{
1487	if (GIMME_V != G_VOID)	1808	if (GIMME_V != G_VOID)
…		…
1489		1810
1490	req = SvAIO_REQ (ST (i));	1811	req = SvAIO_REQ (ST (i));
1491		1812
1492	if (req)	1813	if (req)
1493	{	1814	{
1494	++grp->length;	1815	++grp->size;
1495	req->grp = grp;	1816	req->grp = grp;
1496		1817
1497	req->grp_prev = 0;	1818	req->grp_prev = 0;
1498	req->grp_next = grp->grp_first;	1819	req->grp_next = grp->grp_first;
1499		1820
…		…
1513	void	1834	void
1514	result (aio_req grp, ...)	1835	result (aio_req grp, ...)
1515	CODE:	1836	CODE:
1516	{	1837	{
1517	int i;	1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
1518	AV *av = newAV ();	1843	av = newAV ();
1519		1844
1520	for (i = 1; i < items; ++i )	1845	for (i = 1; i < items; ++i )
1521	av_push (av, newSVsv (ST (i)));	1846	av_push (av, newSVsv (ST (i)));
1522		1847
1523	SvREFCNT_dec (grp->data);	1848	SvREFCNT_dec (grp->sv1);
1524	grp->data = (SV *)av;	1849	grp->sv1 = (SV *)av;
1525	}	1850	}
		1851
		1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
1526		1856
1527	void	1857	void
1528	limit (aio_req grp, int limit)	1858	limit (aio_req grp, int limit)
1529	CODE:	1859	CODE:
1530	grp->fd2 = limit;	1860	grp->int2 = limit;
1531	aio_grp_feed (grp);	1861	aio_grp_feed (grp);
1532		1862
1533	void	1863	void
1534	feed (aio_req grp, SV *callback=&PL_sv_undef)	1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
1535	CODE:	1865	CODE:
1536	{	1866	{
1537	SvREFCNT_dec (grp->fh2);	1867	SvREFCNT_dec (grp->sv2);
1538	grp->fh2 = newSVsv (callback);	1868	grp->sv2 = newSVsv (callback);
1539		1869
1540	if (grp->fd2 <= 0)	1870	if (grp->int2 <= 0)
1541	grp->fd2 = 2;	1871	grp->int2 = 2;
1542		1872
1543	aio_grp_feed (grp);	1873	aio_grp_feed (grp);
1544	}	1874	}
1545		1875

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