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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.71 by root, Tue Oct 24 16:35:04 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);
		318	static void req_cancel (aio_req req);
245		319
246	/* must be called at most once */	320	/* must be called at most once */
247	static SV *req_sv (aio_req req, const char *klass)	321	static SV *req_sv (aio_req req, const char *klass)
248	{	322	{
249	if (!req->self)	323	if (!req->self)
…		…
267	return mg ? (aio_req)mg->mg_ptr : 0;	341	return mg ? (aio_req)mg->mg_ptr : 0;
268	}	342	}
269		343
270	static void aio_grp_feed (aio_req grp)	344	static void aio_grp_feed (aio_req grp)
271	{	345	{
		346	block_sig ();
		347
272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
273	{	349	{
274	int old_len = grp->length;	350	int old_len = grp->size;
275		351
276	if (grp->fh2 && SvOK (grp->fh2))	352	if (grp->sv2 && SvOK (grp->sv2))
277	{	353	{
278	dSP;	354	dSP;
279		355
280	ENTER;	356	ENTER;
281	SAVETMPS;	357	SAVETMPS;
282	PUSHMARK (SP);	358	PUSHMARK (SP);
283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
284	PUTBACK;	360	PUTBACK;
285	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
286	SPAGAIN;	362	SPAGAIN;
287	FREETMPS;	363	FREETMPS;
288	LEAVE;	364	LEAVE;
289	}	365	}
290		366
291	/* stop if no progress has been made */	367	/* stop if no progress has been made */
292	if (old_len == grp->length)	368	if (old_len == grp->size)
293	{	369	{
294	SvREFCNT_dec (grp->fh2);	370	SvREFCNT_dec (grp->sv2);
295	grp->fh2 = 0;	371	grp->sv2 = 0;
296	break;	372	break;
297	}	373	}
298	}	374	}
		375
		376	unblock_sig ();
299	}	377	}
300		378
301	static void aio_grp_dec (aio_req grp)	379	static void aio_grp_dec (aio_req grp)
302	{	380	{
303	--grp->length;	381	--grp->size;
304		382
305	/* call feeder, if applicable */	383	/* call feeder, if applicable */
306	aio_grp_feed (grp);	384	aio_grp_feed (grp);
307		385
308	/* finish, if done */	386	/* finish, if done */
309	if (!grp->length && grp->fd)	387	if (!grp->size && grp->int1)
310	{	388	{
		389	block_sig ();
		390
311	req_invoke (grp);	391	if (!req_invoke (grp))
		392	{
		393	req_free (grp);
		394	unblock_sig ();
		395	croak (0);
		396	}
		397
312	req_free (grp);	398	req_free (grp);
		399	unblock_sig ();
313	}	400	}
314	}	401	}
315		402
316	static void poll_wait ()
317	{
318	fd_set rfd;
319
320	while (nreqs)
321	{
322	int size;
323	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324	LOCK (reslock);
325	#endif
326	size = res_queue.size;
327	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328	UNLOCK (reslock);
329	#endif
330
331	if (size)
332	return;
333
334	FD_ZERO(&rfd);
335	FD_SET(respipe [0], &rfd);
336
337	select (respipe [0] + 1, &rfd, 0, 0, 0);
338	}
339	}
340
341	static void req_invoke (aio_req req)	403	static int req_invoke (aio_req req)
342	{	404	{
343	dSP;	405	dSP;
		406
		407	if (req->flags & FLAG_SV1_RO_OFF)
		408	SvREADONLY_off (req->sv1);
344		409
345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
346	{	411	{
347	errno = req->errorno;
348
349	ENTER;	412	ENTER;
350	SAVETMPS;	413	SAVETMPS;
351	PUSHMARK (SP);	414	PUSHMARK (SP);
352	EXTEND (SP, 1);	415	EXTEND (SP, 1);
353		416
…		…
358	SV *rv = &PL_sv_undef;	421	SV *rv = &PL_sv_undef;
359		422
360	if (req->result >= 0)	423	if (req->result >= 0)
361	{	424	{
362	int i;	425	int i;
363	char *buf = req->data2ptr;	426	char *buf = req->ptr2;
364	AV *av = newAV ();	427	AV *av = newAV ();
365		428
366	av_extend (av, req->result - 1);	429	av_extend (av, req->result - 1);
367		430
368	for (i = 0; i < req->result; ++i)	431	for (i = 0; i < req->result; ++i)
…		…
388	PUSHs (sv_2mortal (newSViv (req->result)));	451	PUSHs (sv_2mortal (newSViv (req->result)));
389	PUTBACK;	452	PUTBACK;
390	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
391	SPAGAIN;	454	SPAGAIN;
392		455
393	fh = SvREFCNT_inc (POPs);	456	fh = POPs;
394
395	PUSHMARK (SP);	457	PUSHMARK (SP);
396	XPUSHs (sv_2mortal (fh));	458	XPUSHs (fh);
397	}	459	}
398	break;	460	break;
399		461
400	case REQ_GROUP:	462	case REQ_GROUP:
401	req->fd = 2; /* mark group as finished */	463	req->int1 = 2; /* mark group as finished */
402		464
403	if (req->data)	465	if (req->sv1)
404	{	466	{
405	int i;	467	int i;
406	AV *av = (AV *)req->data;	468	AV *av = (AV *)req->sv1;
407		469
408	EXTEND (SP, AvFILL (av) + 1);	470	EXTEND (SP, AvFILL (av) + 1);
409	for (i = 0; i <= AvFILL (av); ++i)	471	for (i = 0; i <= AvFILL (av); ++i)
410	PUSHs (*av_fetch (av, i, 0));	472	PUSHs (*av_fetch (av, i, 0));
411	}	473	}
…		…
413		475
414	case REQ_NOP:	476	case REQ_NOP:
415	case REQ_BUSY:	477	case REQ_BUSY:
416	break;	478	break;
417		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
418	default:	504	default:
419	PUSHs (sv_2mortal (newSViv (req->result)));	505	PUSHs (sv_2mortal (newSViv (req->result)));
420	break;	506	break;
421	}	507	}
422		508
		509	errno = req->errorno;
423		510
424	PUTBACK;	511	PUTBACK;
425	call_sv (req->callback, G_VOID | G_EVAL);	512	call_sv (req->callback, G_VOID | G_EVAL);
426	SPAGAIN;	513	SPAGAIN;
427		514
…		…
441	grp->grp_first = req->grp_next;	528	grp->grp_first = req->grp_next;
442		529
443	aio_grp_dec (grp);	530	aio_grp_dec (grp);
444	}	531	}
445		532
446	if (SvTRUE (ERRSV))	533	return !SvTRUE (ERRSV);
447	{
448	req_free (req);
449	croak (0);
450	}
451	}	534	}
452		535
453	static void req_free (aio_req req)	536	static void req_free (aio_req req)
454	{	537	{
455	if (req->self)	538	if (req->self)
456	{	539	{
457	sv_unmagic (req->self, PERL_MAGIC_ext);	540	sv_unmagic (req->self, PERL_MAGIC_ext);
458	SvREFCNT_dec (req->self);	541	SvREFCNT_dec (req->self);
459	}	542	}
460		543
461	SvREFCNT_dec (req->data);
462	SvREFCNT_dec (req->fh);	544	SvREFCNT_dec (req->fh);
		545	SvREFCNT_dec (req->sv1);
463	SvREFCNT_dec (req->fh2);	546	SvREFCNT_dec (req->sv2);
464	SvREFCNT_dec (req->callback);	547	SvREFCNT_dec (req->callback);
465	Safefree (req->statdata);
466		548
467	if (req->type == REQ_READDIR)	549	if (req->flags & FLAG_PTR2_FREE)
468	free (req->data2ptr);	550	free (req->ptr2);
469		551
470	Safefree (req);	552	Safefree (req);
471	}	553	}
472		554
		555	static void req_cancel_subs (aio_req grp)
		556	{
		557	aio_req sub;
		558
		559	if (grp->type != REQ_GROUP)
		560	return;
		561
		562	SvREFCNT_dec (grp->sv2);
		563	grp->sv2 = 0;
		564
		565	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		566	req_cancel (sub);
		567	}
		568
473	static void req_cancel (aio_req req)	569	static void req_cancel (aio_req req)
474	{	570	{
475	req->flags |= FLAG_CANCELLED;	571	req->flags |= FLAG_CANCELLED;
476		572
477	if (req->type == REQ_GROUP)	573	req_cancel_subs (req);
478	{
479	aio_req sub;
480
481	for (sub = req->grp_first; sub; sub = sub->grp_next)
482	req_cancel (sub);
483	}
484	}
485
486	static int poll_cb ()
487	{
488	dSP;
489	int count = 0;
490	int do_croak = 0;
491	aio_req req;
492
493	for (;;)
494	{
495	LOCK (reslock);
496	req = reqq_shift (&res_queue);
497
498	if (req)
499	{
500	if (!res_queue.size)
501	{
502	/* read any signals sent by the worker threads */
503	char buf [32];
504	while (read (respipe [0], buf, 32) == 32)
505	;
506	}
507	}
508
509	UNLOCK (reslock);
510
511	if (!req)
512	break;
513
514	--nreqs;
515
516	if (req->type == REQ_QUIT)
517	started--;
518	else if (req->type == REQ_GROUP && req->length)
519	{
520	req->fd = 1; /* mark request as delayed */
521	continue;
522	}
523	else
524	{
525	if (req->type == REQ_READ)
526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
527
528	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529	SvREADONLY_off (req->data);
530
531	if (req->statdata)
532	{
533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
534	PL_laststatval = req->result;
535	PL_statcache = *(req->statdata);
536	}
537
538	req_invoke (req);
539
540	count++;
541	}
542
543	req_free (req);
544	}
545
546	return count;
547	}	574	}
548		575
549	static void *aio_proc(void *arg);	576	static void *aio_proc(void *arg);
550		577
551	static void start_thread (void)	578	static void start_thread (void)
…		…
553	worker *wrk = calloc (1, sizeof (worker));	580	worker *wrk = calloc (1, sizeof (worker));
554		581
555	if (!wrk)	582	if (!wrk)
556	croak ("unable to allocate worker thread data");	583	croak ("unable to allocate worker thread data");
557		584
558	sigset_t fullsigset, oldsigset;
559	pthread_attr_t attr;
560
561	pthread_attr_init (&attr);
562	pthread_attr_setstacksize (&attr, STACKSIZE);
563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
564
565	sigfillset (&fullsigset);
566
567	LOCK (wrklock);	585	LOCK (wrklock);
568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
569		586
570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
571	{	588	{
572	wrk->prev = &wrk_first;	589	wrk->prev = &wrk_first;
573	wrk->next = wrk_first.next;	590	wrk->next = wrk_first.next;
574	wrk_first.next->prev = wrk;	591	wrk_first.next->prev = wrk;
575	wrk_first.next = wrk;	592	wrk_first.next = wrk;
576	started++;	593	++started;
577	}	594	}
578	else	595	else
579	free (wrk);	596	free (wrk);
580		597
581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
582	UNLOCK (wrklock);	598	UNLOCK (wrklock);
583	}	599	}
584		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
585	static void req_send (aio_req req)	613	static void req_send (aio_req req)
586	{	614	{
587	while (started < wanted && nreqs >= started)	615	block_sig ();
588	start_thread ();
589		616
590	++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;
591		638
592	LOCK (reqlock);	639	LOCK (reqlock);
593	reqq_push (&req_queue, req);	640	reqq_push (&req_queue, req);
594	pthread_cond_signal (&reqwait);	641	COND_SIGNAL (reqwait);
595	UNLOCK (reqlock);	642	UNLOCK (reqlock);
596		643
597	if (nreqs > max_outstanding)	644	LOCK (wrklock);
598	for (;;)	645	--started;
599	{	646	UNLOCK (wrklock);
600	poll_cb ();
601
602	if (nreqs <= max_outstanding)
603	break;
604
605	poll_wait ();
606	}
607	}	647	}
608		648
609	static void end_thread (void)	649	static void set_max_idle (int nthreads)
610	{	650	{
611	aio_req req;	651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
612		652	max_idle = nthreads <= 0 ? 1 : nthreads;
613	Newz (0, req, 1, aio_cb);	653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
614
615	req->type = REQ_QUIT;
616	req->pri = PRI_MAX + PRI_BIAS;
617
618	req_send (req);
619	}	654	}
620		655
621	static void min_parallel (int nthreads)	656	static void min_parallel (int nthreads)
622	{	657	{
623	if (wanted < nthreads)	658	if (wanted < nthreads)
624	wanted = nthreads;	659	wanted = nthreads;
625	}	660	}
626		661
627	static void max_parallel (int nthreads)	662	static void max_parallel (int nthreads)
628	{	663	{
629	int cur = started;
630
631	if (wanted > nthreads)	664	if (wanted > nthreads)
632	wanted = nthreads;	665	wanted = nthreads;
633		666
634	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)
635	{	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
636	end_thread ();	685	maybe_start_thread ();
637	cur--;	686
		687	FD_ZERO(&rfd);
		688	FD_SET(respipe [0], &rfd);
		689
		690	select (respipe [0] + 1, &rfd, 0, 0, 0);
638	}	691	}
		692	}
639		693
640	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 (;;)
641	{	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
642	poll_wait ();	771	poll_wait ();
643	poll_cb ();	772
		773	++maxreqs;
644	}	774	}
		775
		776	unblock_sig ();
		777	return count;
645	}	778	}
646		779
647	static void create_pipe ()	780	static void create_pipe ()
648	{	781	{
649	if (pipe (respipe))	782	if (pipe (respipe))
…		…
666	/*	799	/*
667	* make our pread/pwrite safe against themselves, but not against	800	* make our pread/pwrite safe against themselves, but not against
668	* 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,
669	* but that's your problem, not mine.	802	* but that's your problem, not mine.
670	*/	803	*/
671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	804	static mutex_t preadwritelock = MUTEX_INIT;
672		805
673	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)
674	{	807	{
675	ssize_t res;	808	ssize_t res;
676	off_t ooffset;	809	off_t ooffset;
…		…
704	#if !HAVE_FDATASYNC	837	#if !HAVE_FDATASYNC
705	# define fdatasync fsync	838	# define fdatasync fsync
706	#endif	839	#endif
707		840
708	#if !HAVE_READAHEAD	841	#if !HAVE_READAHEAD
709	# define readahead aio_readahead	842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
710		843
711	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)
712	{	845	{
713	dBUF;	846	dBUF;
714		847
715	while (count > 0)	848	while (count > 0)
716	{	849	{
…		…
721	count -= len;	854	count -= len;
722	}	855	}
723		856
724	errno = 0;	857	errno = 0;
725	}	858	}
		859
726	#endif	860	#endif
727		861
728	#if !HAVE_READDIR_R	862	#if !HAVE_READDIR_R
729	# define readdir_r aio_readdir_r	863	# define readdir_r aio_readdir_r
730		864
731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	865	static mutex_t readdirlock = MUTEX_INIT;
732		866
733	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)
734	{	868	{
735	struct dirent *e;	869	struct dirent *e;
736	int errorno;	870	int errorno;
…		…
775	{	909	{
776	off_t sbytes;	910	off_t sbytes;
777	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778		912
779	if (res < 0 && sbytes)	913	if (res < 0 && sbytes)
780	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
781	res = sbytes;	915	res = sbytes;
782	}	916	}
783		917
784	# elif __hpux	918	# elif __hpux
785	res = sendfile (ofd, ifd, offset, count, 0, 0);	919	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
863	int memofs = 0;	997	int memofs = 0;
864	int res = 0;	998	int res = 0;
865	int errorno;	999	int errorno;
866		1000
867	LOCK (wrklock);	1001	LOCK (wrklock);
868	self->dirp = dirp = opendir (req->dataptr);	1002	self->dirp = dirp = opendir (req->ptr1);
869	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);
870	UNLOCK (wrklock);	1006	UNLOCK (wrklock);
871
872	req->data2ptr = names = malloc (memlen);
873		1007
874	if (dirp && u && names)	1008	if (dirp && u && names)
875	for (;;)	1009	for (;;)
876	{	1010	{
877	errno = 0;	1011	errno = 0;
…		…
890		1024
891	while (memofs + len > memlen)	1025	while (memofs + len > memlen)
892	{	1026	{
893	memlen *= 2;	1027	memlen *= 2;
894	LOCK (wrklock);	1028	LOCK (wrklock);
895	req->data2ptr = names = realloc (names, memlen);	1029	req->ptr2 = names = realloc (names, memlen);
896	UNLOCK (wrklock);	1030	UNLOCK (wrklock);
897		1031
898	if (!names)	1032	if (!names)
899	break;	1033	break;
900	}	1034	}
…		…
913	/*****************************************************************************/	1047	/*****************************************************************************/
914		1048
915	static void *aio_proc (void *thr_arg)	1049	static void *aio_proc (void *thr_arg)
916	{	1050	{
917	aio_req req;	1051	aio_req req;
918	int type;	1052	struct timespec ts;
919	worker *self = (worker *)thr_arg;	1053	worker *self = (worker *)thr_arg;
920		1054
921	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 (;;)
922	{	1060	{
		1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1062
923	LOCK (reqlock);	1063	LOCK (reqlock);
924		1064
925	for (;;)	1065	for (;;)
926	{	1066	{
927	self->req = req = reqq_shift (&req_queue);	1067	self->req = req = reqq_shift (&req_queue);
928		1068
929	if (req)	1069	if (req)
930	break;	1070	break;
931		1071
932	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;
933	}	1093	}
		1094
		1095	--nready;
934		1096
935	UNLOCK (reqlock);	1097	UNLOCK (reqlock);
936		1098
937	errno = 0; /* strictly unnecessary */	1099	errno = 0; /* strictly unnecessary */
938	type = req->type; /* remember type for QUIT check */
939		1100
940	if (!(req->flags & FLAG_CANCELLED))	1101	if (!(req->flags & FLAG_CANCELLED))
941	switch (type)	1102	switch (req->type)
942	{	1103	{
943	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;
944	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;
945		1106
946	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;
947	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;
948		1109
949	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;
950	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;
951	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;
952		1113
953	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;
954	case REQ_CLOSE: req->result = close (req->fd); break;	1115	case REQ_CLOSE: req->result = close (req->int1); break;
955	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
956	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;
957	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
959	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;
960		1124
961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
962	case REQ_FSYNC: req->result = fsync (req->fd); break;	1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
963	case REQ_READDIR: scandir_ (req, self); break;	1127	case REQ_READDIR: scandir_ (req, self); break;
964		1128
965	case REQ_BUSY:	1129	case REQ_BUSY:
966	{	1130	{
967	struct timeval tv;	1131	struct timeval tv;
968		1132
969	tv.tv_sec = req->fd;	1133	tv.tv_sec = req->int1;
970	tv.tv_usec = req->fd2;	1134	tv.tv_usec = req->int2;
971		1135
972	req->result = select (0, 0, 0, 0, &tv);	1136	req->result = select (0, 0, 0, 0, &tv);
973	}	1137	}
974		1138
975	case REQ_GROUP:	1139	case REQ_GROUP:
976	case REQ_NOP:	1140	case REQ_NOP:
		1141	break;
		1142
977	case REQ_QUIT:	1143	case REQ_QUIT:
978	break;	1144	goto quit;
979		1145
980	default:	1146	default:
981	req->result = ENOSYS;	1147	req->result = ENOSYS;
982	break;	1148	break;
983	}	1149	}
984		1150
985	req->errorno = errno;	1151	req->errorno = errno;
986		1152
987	LOCK (reslock);	1153	LOCK (reslock);
988		1154
		1155	++npending;
		1156
989	if (!reqq_push (&res_queue, req))	1157	if (!reqq_push (&res_queue, req))
		1158	{
990	/* write a dummy byte to the pipe so fh becomes ready */	1159	/* write a dummy byte to the pipe so fh becomes ready */
991	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	}
992		1166
993	self->req = 0;	1167	self->req = 0;
994	worker_clear (self);	1168	worker_clear (self);
995		1169
996	UNLOCK (reslock);	1170	UNLOCK (reslock);
997	}	1171	}
998	while (type != REQ_QUIT);
999		1172
		1173	quit:
1000	LOCK (wrklock);	1174	LOCK (wrklock);
1001	worker_free (self);	1175	worker_free (self);
1002	UNLOCK (wrklock);	1176	UNLOCK (wrklock);
1003		1177
1004	return 0;	1178	return 0;
…		…
1051		1225
1052	worker_clear (wrk);	1226	worker_clear (wrk);
1053	worker_free (wrk);	1227	worker_free (wrk);
1054	}	1228	}
1055		1229
1056	started = 0;	1230	started = 0;
		1231	idle = 0;
1057	nreqs = 0;	1232	nreqs = 0;
		1233	nready = 0;
		1234	npending = 0;
1058		1235
1059	close (respipe [0]);	1236	close (respipe [0]);
1060	close (respipe [1]);	1237	close (respipe [1]);
1061	create_pipe ();	1238	create_pipe ();
1062		1239
…		…
1089	PROTOTYPES: ENABLE	1266	PROTOTYPES: ENABLE
1090		1267
1091	BOOT:	1268	BOOT:
1092	{	1269	{
1093	HV *stash = gv_stashpv ("IO::AIO", 1);	1270	HV *stash = gv_stashpv ("IO::AIO", 1);
		1271
1094	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1095	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1096	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));
1097		1279
1098	create_pipe ();	1280	create_pipe ();
1099	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
1100	}	1282	}
1101		1283
1102	void	1284	void
1103	min_parallel (nthreads)	1285	max_poll_reqs (int nreqs)
1104	int nthreads
1105	PROTOTYPE: $	1286	PROTOTYPE: $
		1287	CODE:
		1288	max_poll_reqs = nreqs;
1106		1289
1107	void	1290	void
1108	max_parallel (nthreads)	1291	max_poll_time (double nseconds)
1109	int nthreads
1110	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);
1111		1309
1112	int	1310	int
1113	max_outstanding (nreqs)	1311	max_outstanding (int maxreqs)
1114	int nreqs	1312	PROTOTYPE: $
1115	PROTOTYPE: $
1116	CODE:	1313	CODE:
1117	RETVAL = max_outstanding;	1314	RETVAL = max_outstanding;
1118	max_outstanding = nreqs;	1315	max_outstanding = maxreqs;
		1316	OUTPUT:
		1317	RETVAL
1119		1318
1120	void	1319	void
1121	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1122	SV * pathname	1321	SV8 * pathname
1123	int flags	1322	int flags
1124	int mode	1323	int mode
1125	SV * callback	1324	SV * callback
1126	PROTOTYPE: $$$;$	1325	PROTOTYPE: $$$;$
1127	PPCODE:	1326	PPCODE:
1128	{	1327	{
1129	dREQ;	1328	dREQ;
1130		1329
1131	req->type = REQ_OPEN;	1330	req->type = REQ_OPEN;
1132	req->data = newSVsv (pathname);	1331	req->sv1 = newSVsv (pathname);
1133	req->dataptr = SvPVbyte_nolen (req->data);	1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
1134	req->fd = flags;	1333	req->int1 = flags;
1135	req->mode = mode;	1334	req->mode = mode;
1136		1335
1137	REQ_SEND;	1336	REQ_SEND;
1138	}	1337	}
1139		1338
…		…
1149	PPCODE:	1348	PPCODE:
1150	{	1349	{
1151	dREQ;	1350	dREQ;
1152		1351
1153	req->type = ix;	1352	req->type = ix;
1154	req->fh = newSVsv (fh);	1353	req->fh = newSVsv (fh);
1155	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1156		1355
1157	REQ_SEND (req);	1356	REQ_SEND (req);
1158	}	1357	}
1159		1358
1160	void	1359	void
1161	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1162	SV * fh	1361	SV * fh
1163	UV offset	1362	UV offset
1164	UV length	1363	UV length
1165	SV * data	1364	SV8 * data
1166	UV dataoffset	1365	UV dataoffset
1167	SV * callback	1366	SV * callback
1168	ALIAS:	1367	ALIAS:
1169	aio_read = REQ_READ	1368	aio_read = REQ_READ
1170	aio_write = REQ_WRITE	1369	aio_write = REQ_WRITE
1171	PROTOTYPE: $$$$$;$	1370	PROTOTYPE: $$$$$;$
1172	PPCODE:	1371	PPCODE:
1173	{	1372	{
1174	aio_req req;
1175	STRLEN svlen;	1373	STRLEN svlen;
1176	char *svptr = SvPVbyte (data, svlen);	1374	char *svptr = SvPVbyte (data, svlen);
1177		1375
1178	SvUPGRADE (data, SVt_PV);	1376	SvUPGRADE (data, SVt_PV);
1179	SvPOK_on (data);	1377	SvPOK_on (data);
…		…
1191	length = svlen - dataoffset;	1389	length = svlen - dataoffset;
1192	}	1390	}
1193	else	1391	else
1194	{	1392	{
1195	/* read: grow scalar as necessary */	1393	/* read: grow scalar as necessary */
1196	svptr = SvGROW (data, length + dataoffset);	1394	svptr = SvGROW (data, length + dataoffset + 1);
1197	}	1395	}
1198		1396
1199	if (length < 0)	1397	if (length < 0)
1200	croak ("length must not be negative");	1398	croak ("length must not be negative");
1201		1399
1202	{	1400	{
1203	dREQ;	1401	dREQ;
1204		1402
1205	req->type = ix;	1403	req->type = ix;
1206	req->fh = newSVsv (fh);	1404	req->fh = newSVsv (fh);
1207	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1208	: IoOFP (sv_2io (fh)));	1406	: IoOFP (sv_2io (fh)));
1209	req->offset = offset;	1407	req->offs = offset;
1210	req->length = length;	1408	req->size = length;
1211	req->data = SvREFCNT_inc (data);	1409	req->sv1 = SvREFCNT_inc (data);
1212	req->dataptr = (char *)svptr + dataoffset;	1410	req->ptr1 = (char *)svptr + dataoffset;
		1411	req->stroffset = dataoffset;
1213		1412
1214	if (!SvREADONLY (data))	1413	if (!SvREADONLY (data))
1215	{	1414	{
1216	SvREADONLY_on (data);	1415	SvREADONLY_on (data);
1217	req->data2ptr = (void *)data;	1416	req->flags |= FLAG_SV1_RO_OFF;
1218	}	1417	}
1219		1418
1220	REQ_SEND;	1419	REQ_SEND;
1221	}	1420	}
		1421	}
		1422
		1423	void
		1424	aio_readlink (path,callback=&PL_sv_undef)
		1425	SV8 * path
		1426	SV * callback
		1427	PROTOTYPE: $$;$
		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;
1222	}	1443	}
1223		1444
1224	void	1445	void
1225	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)
1226	SV * out_fh	1447	SV * out_fh
…		…
1232	PPCODE:	1453	PPCODE:
1233	{	1454	{
1234	dREQ;	1455	dREQ;
1235		1456
1236	req->type = REQ_SENDFILE;	1457	req->type = REQ_SENDFILE;
1237	req->fh = newSVsv (out_fh);	1458	req->fh = newSVsv (out_fh);
1238	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1239	req->fh2 = newSVsv (in_fh);	1460	req->sv2 = newSVsv (in_fh);
1240	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1241	req->offset = in_offset;	1462	req->offs = in_offset;
1242	req->length = length;	1463	req->size = length;
1243		1464
1244	REQ_SEND;	1465	REQ_SEND;
1245	}	1466	}
1246		1467
1247	void	1468	void
…		…
1254	PPCODE:	1475	PPCODE:
1255	{	1476	{
1256	dREQ;	1477	dREQ;
1257		1478
1258	req->type = REQ_READAHEAD;	1479	req->type = REQ_READAHEAD;
1259	req->fh = newSVsv (fh);	1480	req->fh = newSVsv (fh);
1260	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1261	req->offset = offset;	1482	req->offs = offset;
1262	req->length = length;	1483	req->size = length;
1263		1484
1264	REQ_SEND;	1485	REQ_SEND;
1265	}	1486	}
1266		1487
1267	void	1488	void
1268	aio_stat (fh_or_path,callback=&PL_sv_undef)	1489	aio_stat (fh_or_path,callback=&PL_sv_undef)
1269	SV * fh_or_path	1490	SV8 * fh_or_path
1270	SV * callback	1491	SV * callback
1271	ALIAS:	1492	ALIAS:
1272	aio_stat = REQ_STAT	1493	aio_stat = REQ_STAT
1273	aio_lstat = REQ_LSTAT	1494	aio_lstat = REQ_LSTAT
1274	PPCODE:	1495	PPCODE:
1275	{	1496	{
1276	dREQ;	1497	dREQ;
1277		1498
1278	New (0, req->statdata, 1, Stat_t);	1499	req->ptr2 = malloc (sizeof (Stat_t));
1279	if (!req->statdata)	1500	if (!req->ptr2)
1280	{	1501	{
1281	req_free (req);	1502	req_free (req);
1282	croak ("out of memory during aio_req->statdata allocation");	1503	croak ("out of memory during aio_stat statdata allocation");
1283	}	1504	}
		1505
		1506	req->flags |= FLAG_PTR2_FREE;
1284		1507
1285	if (SvPOK (fh_or_path))	1508	if (SvPOK (fh_or_path))
1286	{	1509	{
1287	req->type = ix;	1510	req->type = ix;
1288	req->data = newSVsv (fh_or_path);	1511	req->sv1 = newSVsv (fh_or_path);
1289	req->dataptr = SvPVbyte_nolen (req->data);	1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1290	}	1513	}
1291	else	1514	else
1292	{	1515	{
1293	req->type = REQ_FSTAT;	1516	req->type = REQ_FSTAT;
1294	req->fh = newSVsv (fh_or_path);	1517	req->fh = newSVsv (fh_or_path);
1295	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1296	}	1519	}
1297		1520
1298	REQ_SEND;	1521	REQ_SEND;
1299	}	1522	}
1300		1523
1301	void	1524	void
1302	aio_unlink (pathname,callback=&PL_sv_undef)	1525	aio_unlink (pathname,callback=&PL_sv_undef)
1303	SV * pathname	1526	SV8 * pathname
1304	SV * callback	1527	SV * callback
1305	ALIAS:	1528	ALIAS:
1306	aio_unlink = REQ_UNLINK	1529	aio_unlink = REQ_UNLINK
1307	aio_rmdir = REQ_RMDIR	1530	aio_rmdir = REQ_RMDIR
1308	aio_readdir = REQ_READDIR	1531	aio_readdir = REQ_READDIR
1309	PPCODE:	1532	PPCODE:
1310	{	1533	{
1311	dREQ;	1534	dREQ;
1312		1535
1313	req->type = ix;	1536	req->type = ix;
1314	req->data = newSVsv (pathname);	1537	req->sv1 = newSVsv (pathname);
1315	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;
1316		1551
		1552	req->type = REQ_MKDIR;
		1553	req->sv1 = newSVsv (pathname);
		1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1555	req->mode = mode;
		1556
1317	REQ_SEND;	1557	REQ_SEND;
1318	}	1558	}
1319		1559
1320	void	1560	void
1321	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1322	SV * oldpath	1562	SV8 * oldpath
1323	SV * newpath	1563	SV8 * newpath
1324	SV * callback	1564	SV * callback
1325	ALIAS:	1565	ALIAS:
1326	aio_link = REQ_LINK	1566	aio_link = REQ_LINK
1327	aio_symlink = REQ_SYMLINK	1567	aio_symlink = REQ_SYMLINK
1328	aio_rename = REQ_RENAME	1568	aio_rename = REQ_RENAME
1329	PPCODE:	1569	PPCODE:
1330	{	1570	{
1331	dREQ;	1571	dREQ;
1332		1572
1333	req->type = ix;	1573	req->type = ix;
1334	req->fh = newSVsv (oldpath);	1574	req->fh = newSVsv (oldpath);
1335	req->data2ptr = SvPVbyte_nolen (req->fh);	1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1336	req->data = newSVsv (newpath);	1576	req->sv1 = newSVsv (newpath);
1337	req->dataptr = SvPVbyte_nolen (req->data);	1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1338		1578
1339	REQ_SEND;	1579	REQ_SEND;
1340	}	1580	}
1341		1581
1342	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
1343	aio_busy (delay,callback=&PL_sv_undef)	1602	aio_busy (delay,callback=&PL_sv_undef)
1344	double delay	1603	double delay
1345	SV * callback	1604	SV * callback
1346	PPCODE:	1605	PPCODE:
1347	{	1606	{
1348	dREQ;	1607	dREQ;
1349		1608
1350	req->type = REQ_BUSY;	1609	req->type = REQ_BUSY;
1351	req->fd = delay < 0. ? 0 : delay;	1610	req->int1 = delay < 0. ? 0 : delay;
1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1353		1612
1354	REQ_SEND;	1613	REQ_SEND;
1355	}	1614	}
1356		1615
1357	void	1616	void
…		…
1361	PPCODE:	1620	PPCODE:
1362	{	1621	{
1363	dREQ;	1622	dREQ;
1364		1623
1365	req->type = REQ_GROUP;	1624	req->type = REQ_GROUP;
		1625
1366	req_send (req);	1626	req_send (req);
1367
1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1369	}	1628	}
1370		1629
1371	void	1630	void
1372	aio_nop (callback=&PL_sv_undef)	1631	aio_nop (callback=&PL_sv_undef)
1373	SV * callback	1632	SV * callback
1374	PPCODE:	1633	PPCODE:
1375	{	1634	{
1376	dREQ;	1635	dREQ;
1377		1636
1378	req->type = REQ_NOP;	1637	req->type = REQ_NOP;
1379		1638
1380	REQ_SEND;	1639	REQ_SEND;
1381	}	1640	}
1382		1641
1383	void	1642	int
1384	aioreq_pri (int pri = DEFAULT_PRI)	1643	aioreq_pri (int pri = 0)
1385	CODE:	1644	PROTOTYPE: ;$
		1645	CODE:
		1646	RETVAL = next_pri - PRI_BIAS;
		1647	if (items > 0)
		1648	{
1386	if (pri < PRI_MIN) pri = PRI_MIN;	1649	if (pri < PRI_MIN) pri = PRI_MIN;
1387	if (pri > PRI_MAX) pri = PRI_MAX;	1650	if (pri > PRI_MAX) pri = PRI_MAX;
1388	next_pri = pri + PRI_BIAS;	1651	next_pri = pri + PRI_BIAS;
		1652	}
		1653	OUTPUT:
		1654	RETVAL
1389		1655
1390	void	1656	void
1391	aioreq_nice (int nice = 0)	1657	aioreq_nice (int nice = 0)
1392	CODE:	1658	CODE:
1393	nice = next_pri - nice;	1659	nice = next_pri - nice;
1394	if (nice < PRI_MIN) nice = PRI_MIN;	1660	if (nice < PRI_MIN) nice = PRI_MIN;
1395	if (nice > PRI_MAX) nice = PRI_MAX;	1661	if (nice > PRI_MAX) nice = PRI_MAX;
1396	next_pri = nice + PRI_BIAS;	1662	next_pri = nice + PRI_BIAS;
1397		1663
1398	void	1664	void
1399	flush ()	1665	flush ()
1400	PROTOTYPE:	1666	PROTOTYPE:
1401	CODE:	1667	CODE:
…		…
1403	{	1669	{
1404	poll_wait ();	1670	poll_wait ();
1405	poll_cb ();	1671	poll_cb ();
1406	}	1672	}
1407		1673
1408	void	1674	int
1409	poll()	1675	poll()
1410	PROTOTYPE:	1676	PROTOTYPE:
1411	CODE:	1677	CODE:
1412	if (nreqs)
1413	{
1414	poll_wait ();	1678	poll_wait ();
1415	poll_cb ();	1679	RETVAL = poll_cb ();
1416	}	1680	OUTPUT:
		1681	RETVAL
1417		1682
1418	int	1683	int
1419	poll_fileno()	1684	poll_fileno()
1420	PROTOTYPE:	1685	PROTOTYPE:
1421	CODE:	1686	CODE:
…		…
1433		1698
1434	void	1699	void
1435	poll_wait()	1700	poll_wait()
1436	PROTOTYPE:	1701	PROTOTYPE:
1437	CODE:	1702	CODE:
1438	if (nreqs)
1439	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	}
1440		1741
1441	int	1742	int
1442	nreqs()	1743	nreqs()
1443	PROTOTYPE:	1744	PROTOTYPE:
1444	CODE:	1745	CODE:
1445	RETVAL = nreqs;	1746	RETVAL = nreqs;
1446	OUTPUT:	1747	OUTPUT:
1447	RETVAL	1748	RETVAL
1448		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
1449	PROTOTYPES: DISABLE	1776	PROTOTYPES: DISABLE
1450		1777
1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452		1779
1453	void	1780	void
…		…
1468	PPCODE:	1795	PPCODE:
1469	{	1796	{
1470	int i;	1797	int i;
1471	aio_req req;	1798	aio_req req;
1472		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
1473	if (grp->fd == 2)	1803	if (grp->int1 == 2)
1474	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");
1475		1805
1476	for (i = 1; i < items; ++i )	1806	for (i = 1; i < items; ++i )
1477	{	1807	{
1478	if (GIMME_V != G_VOID)	1808	if (GIMME_V != G_VOID)
…		…
1480		1810
1481	req = SvAIO_REQ (ST (i));	1811	req = SvAIO_REQ (ST (i));
1482		1812
1483	if (req)	1813	if (req)
1484	{	1814	{
1485	++grp->length;	1815	++grp->size;
1486	req->grp = grp;	1816	req->grp = grp;
1487		1817
1488	req->grp_prev = 0;	1818	req->grp_prev = 0;
1489	req->grp_next = grp->grp_first;	1819	req->grp_next = grp->grp_first;
1490		1820
…		…
1495	}	1825	}
1496	}	1826	}
1497	}	1827	}
1498		1828
1499	void	1829	void
		1830	cancel_subs (aio_req_ornot req)
		1831	CODE:
		1832	req_cancel_subs (req);
		1833
		1834	void
1500	result (aio_req grp, ...)	1835	result (aio_req grp, ...)
1501	CODE:	1836	CODE:
1502	{	1837	{
1503	int i;	1838	int i;
		1839	AV *av;
		1840
		1841	grp->errorno = errno;
		1842
1504	AV *av = newAV ();	1843	av = newAV ();
1505		1844
1506	for (i = 1; i < items; ++i )	1845	for (i = 1; i < items; ++i )
1507	av_push (av, newSVsv (ST (i)));	1846	av_push (av, newSVsv (ST (i)));
1508		1847
1509	SvREFCNT_dec (grp->data);	1848	SvREFCNT_dec (grp->sv1);
1510	grp->data = (SV *)av;	1849	grp->sv1 = (SV *)av;
1511	}	1850	}
		1851
		1852	void
		1853	errno (aio_req grp, int errorno = errno)
		1854	CODE:
		1855	grp->errorno = errorno;
1512		1856
1513	void	1857	void
1514	limit (aio_req grp, int limit)	1858	limit (aio_req grp, int limit)
1515	CODE:	1859	CODE:
1516	grp->fd2 = limit;	1860	grp->int2 = limit;
1517	aio_grp_feed (grp);	1861	aio_grp_feed (grp);
1518		1862
1519	void	1863	void
1520	feed (aio_req grp, SV *callback=&PL_sv_undef)	1864	feed (aio_req grp, SV *callback=&PL_sv_undef)
1521	CODE:	1865	CODE:
1522	{	1866	{
1523	SvREFCNT_dec (grp->fh2);	1867	SvREFCNT_dec (grp->sv2);
1524	grp->fh2 = newSVsv (callback);	1868	grp->sv2 = newSVsv (callback);
1525		1869
1526	if (grp->fd2 <= 0)	1870	if (grp->int2 <= 0)
1527	grp->fd2 = 2;	1871	grp->int2 = 2;
1528		1872
1529	aio_grp_feed (grp);	1873	aio_grp_feed (grp);
1530	}	1874	}
1531		1875

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