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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.19 by root, Sun Jul 31 19:04:45 2005 UTC vs.
Revision 1.94 by root, Sun Nov 26 18:28:37 2006 UTC

1	#ifndef _REENTRANT	1	/* solaris */
2	# define _REENTRANT 1	2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
3	#endif	6	#endif
		7
		8	/* just in case */
		9	#define _REENTRANT 1
		10
4	#include <errno.h>	11	#include <errno.h>
5		12
6	#include "EXTERN.h"	13	#include "EXTERN.h"
7	#include "perl.h"	14	#include "perl.h"
8	#include "XSUB.h"	15	#include "XSUB.h"
9		16
10	#include "autoconf/config.h"	17	#include "autoconf/config.h"
11		18
		19	#include <pthread.h>
		20
		21	#include <stddef.h>
		22	#include <stdlib.h>
		23	#include <errno.h>
		24	#include <sys/time.h>
		25	#include <sys/select.h>
12	#include <sys/types.h>	26	#include <sys/types.h>
13	#include <sys/stat.h>	27	#include <sys/stat.h>
14		28	#include <limits.h>
15	#include <unistd.h>	29	#include <unistd.h>
16	#include <fcntl.h>	30	#include <fcntl.h>
17	#include <signal.h>	31	#include <signal.h>
18	#include <sched.h>	32	#include <sched.h>
19		33
20	#include <pthread.h>	34	#if HAVE_SENDFILE
		35	# if __linux
		36	# include <sys/sendfile.h>
		37	# elif __freebsd
		38	# include <sys/socket.h>
		39	# include <sys/uio.h>
		40	# elif __hpux
		41	# include <sys/socket.h>
		42	# elif __solaris /* not yet */
		43	# include <sys/sendfile.h>
		44	# else
		45	# error sendfile support requested but not available
		46	# endif
		47	#endif
21		48
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	/* number of seconds after which idle threads exit */
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	50	#define IDLE_TIMEOUT 10
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	51
		52	/* used for struct dirent, AIX doesn't provide it */
		53	#ifndef NAME_MAX
		54	# define NAME_MAX 4096
		55	#endif
		56
		57	#ifndef PTHREAD_STACK_MIN
		58	/* care for broken platforms, e.g. windows */
		59	# define PTHREAD_STACK_MIN 16384
		60	#endif
25		61
26	#if __ia64	62	#if __ia64
27	# define STACKSIZE 65536	63	# define STACKSIZE 65536
		64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		65	# define STACKSIZE PTHREAD_STACK_MIN
28	#else	66	#else
29	# define STACKSIZE 4096	67	# define STACKSIZE 16384
30	#endif	68	#endif
		69
		70	/* wether word reads are potentially non-atomic.
		71	* this is conservatice, likely most arches this runs
		72	* on have atomic word read/writes.
		73	*/
		74	#ifndef WORDACCESS_UNSAFE
		75	# if __i386 || __x86_64
		76	# define WORDACCESS_UNSAFE 0
		77	# else
		78	# define WORDACCESS_UNSAFE 1
		79	# endif
		80	#endif
		81
		82	/* buffer size for various temporary buffers */
		83	#define AIO_BUFSIZE 65536
		84
		85	#define dBUF \
		86	char *aio_buf; \
		87	LOCK (wrklock); \
		88	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		89	UNLOCK (wrklock); \
		90	if (!aio_buf) \
		91	return -1;
		92
		93	typedef SV SV8; /* byte-sv, used for argument-checking */
31		94
32	enum {	95	enum {
33	REQ_QUIT,	96	REQ_QUIT,
34	REQ_OPEN, REQ_CLOSE,	97	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,	98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		99	REQ_SENDFILE,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
37	REQ_FSYNC, REQ_FDATASYNC,	101	REQ_FSYNC, REQ_FDATASYNC,
		102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		103	REQ_MKNOD, REQ_READDIR,
		104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		105	REQ_GROUP, REQ_NOP,
		106	REQ_BUSY,
38	};	107	};
39		108
		109	#define AIO_REQ_KLASS "IO::AIO::REQ"
		110	#define AIO_GRP_KLASS "IO::AIO::GRP"
		111
40	typedef struct aio_cb {	112	typedef struct aio_cb
		113	{
41	struct aio_cb *volatile next;	114	struct aio_cb *volatile next;
42		115
		116	SV *callback, *fh;
		117	SV *sv1, *sv2;
		118	void *ptr1, *ptr2;
		119	off_t offs;
		120	size_t size;
		121	ssize_t result;
		122
		123	STRLEN stroffset;
43	int type;	124	int type;
44		125	int int1, int2;
45	int fd;	126	int errorno;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */	127	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr;
53	STRLEN dataoffset;
54		128
55	Stat_t *statdata;	129	unsigned char flags;
		130	unsigned char pri;
		131
		132	SV *self; /* the perl counterpart of this request, if any */
		133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56	} aio_cb;	134	} aio_cb;
57		135
		136	enum {
		137	FLAG_CANCELLED = 0x01, /* request was cancelled */
		138	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		139	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		140	};
		141
58	typedef aio_cb *aio_req;	142	typedef aio_cb *aio_req;
		143	typedef aio_cb *aio_req_ornot;
59		144
60	static int started;	145	enum {
61	static volatile int nreqs;	146	PRI_MIN = -4,
62	static int max_outstanding = 1<<30;	147	PRI_MAX = 4,
		148
		149	DEFAULT_PRI = 0,
		150	PRI_BIAS = -PRI_MIN,
		151	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		152	};
		153
		154	#define AIO_TICKS ((1000000 + 1023) >> 10)
		155
		156	static unsigned int max_poll_time = 0;
		157	static unsigned int max_poll_reqs = 0;
		158
		159	/* calculcate time difference in ~1/AIO_TICKS of a second */
		160	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		161	{
		162	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		163	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		164	}
		165
		166	static pthread_t main_tid;
		167	static int main_sig;
		168	static int block_sig_level;
		169
		170	void block_sig ()
		171	{
		172	sigset_t ss;
		173
		174	if (block_sig_level++)
		175	return;
		176
		177	if (!main_sig)
		178	return;
		179
		180	sigemptyset (&ss);
		181	sigaddset (&ss, main_sig);
		182	pthread_sigmask (SIG_BLOCK, &ss, 0);
		183	}
		184
		185	void unblock_sig ()
		186	{
		187	sigset_t ss;
		188
		189	if (--block_sig_level)
		190	return;
		191
		192	if (!main_sig)
		193	return;
		194
		195	sigemptyset (&ss);
		196	sigaddset (&ss, main_sig);
		197	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		198	}
		199
		200	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		201
		202	static unsigned int started, idle, wanted;
		203
		204	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		205	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		206	#else
		207	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		208	#endif
		209
		210	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		211	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		212
		213	/* worker threads management */
		214	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		215
		216	typedef struct worker {
		217	/* locked by wrklock */
		218	struct worker *prev, *next;
		219
		220	pthread_t tid;
		221
		222	/* locked by reslock, reqlock or wrklock */
		223	aio_req req; /* currently processed request */
		224	void *dbuf;
		225	DIR *dirp;
		226	} worker;
		227
		228	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		229
		230	static void worker_clear (worker *wrk)
		231	{
		232	if (wrk->dirp)
		233	{
		234	closedir (wrk->dirp);
		235	wrk->dirp = 0;
		236	}
		237
		238	if (wrk->dbuf)
		239	{
		240	free (wrk->dbuf);
		241	wrk->dbuf = 0;
		242	}
		243	}
		244
		245	static void worker_free (worker *wrk)
		246	{
		247	wrk->next->prev = wrk->prev;
		248	wrk->prev->next = wrk->next;
		249
		250	free (wrk);
		251	}
		252
		253	static volatile unsigned int nreqs, nready, npending;
		254	static volatile unsigned int max_idle = 4;
		255	static volatile unsigned int max_outstanding = 0xffffffff;
63	static int respipe [2];	256	static int respipe [2];
64		257
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		261
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	262	#if WORDACCESS_UNSAFE
70	static volatile aio_req ress, rese; /* queue start, queue end */
71		263
72	static void	264	static unsigned int get_nready ()
73	poll_wait ()
74	{	265	{
75	if (nreqs && !ress)	266	unsigned int retval;
		267
		268	LOCK (reqlock);
		269	retval = nready;
		270	UNLOCK (reqlock);
		271
		272	return retval;
		273	}
		274
		275	static unsigned int get_npending ()
		276	{
		277	unsigned int retval;
		278
		279	LOCK (reslock);
		280	retval = npending;
		281	UNLOCK (reslock);
		282
		283	return retval;
		284	}
		285
		286	static unsigned int get_nthreads ()
		287	{
		288	unsigned int retval;
		289
		290	LOCK (wrklock);
		291	retval = started;
		292	UNLOCK (wrklock);
		293
		294	return retval;
		295	}
		296
		297	#else
		298
		299	# define get_nready() nready
		300	# define get_npending() npending
		301	# define get_nthreads() started
		302
		303	#endif
		304
		305	/*
		306	* a somewhat faster data structure might be nice, but
		307	* with 8 priorities this actually needs <20 insns
		308	* per shift, the most expensive operation.
		309	*/
		310	typedef struct {
		311	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		312	int size;
		313	} reqq;
		314
		315	static reqq req_queue;
		316	static reqq res_queue;
		317
		318	int reqq_push (reqq *q, aio_req req)
		319	{
		320	int pri = req->pri;
		321	req->next = 0;
		322
		323	if (q->qe[pri])
76	{	324	{
77	fd_set rfd;	325	q->qe[pri]->next = req;
78	FD_ZERO(&rfd);	326	q->qe[pri] = req;
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	327	}
83	}	328	else
		329	q->qe[pri] = q->qs[pri] = req;
84		330
85	static int	331	return q->size++;
86	poll_cb ()	332	}
		333
		334	aio_req reqq_shift (reqq *q)
		335	{
		336	int pri;
		337
		338	if (!q->size)
		339	return 0;
		340
		341	--q->size;
		342
		343	for (pri = NUM_PRI; pri--; )
		344	{
		345	aio_req req = q->qs[pri];
		346
		347	if (req)
		348	{
		349	if (!(q->qs[pri] = req->next))
		350	q->qe[pri] = 0;
		351
		352	return req;
		353	}
		354	}
		355
		356	abort ();
		357	}
		358
		359	static int poll_cb ();
		360	static int req_invoke (aio_req req);
		361	static void req_free (aio_req req);
		362	static void req_cancel (aio_req req);
		363
		364	/* must be called at most once */
		365	static SV *req_sv (aio_req req, const char *klass)
		366	{
		367	if (!req->self)
		368	{
		369	req->self = (SV *)newHV ();
		370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		371	}
		372
		373	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		374	}
		375
		376	static aio_req SvAIO_REQ (SV *sv)
		377	{
		378	MAGIC *mg;
		379
		380	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		381	croak ("object of class " AIO_REQ_KLASS " expected");
		382
		383	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		384
		385	return mg ? (aio_req)mg->mg_ptr : 0;
		386	}
		387
		388	static void aio_grp_feed (aio_req grp)
		389	{
		390	block_sig ();
		391
		392	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		393	{
		394	int old_len = grp->size;
		395
		396	if (grp->sv2 && SvOK (grp->sv2))
		397	{
		398	dSP;
		399
		400	ENTER;
		401	SAVETMPS;
		402	PUSHMARK (SP);
		403	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		404	PUTBACK;
		405	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		406	SPAGAIN;
		407	FREETMPS;
		408	LEAVE;
		409	}
		410
		411	/* stop if no progress has been made */
		412	if (old_len == grp->size)
		413	{
		414	SvREFCNT_dec (grp->sv2);
		415	grp->sv2 = 0;
		416	break;
		417	}
		418	}
		419
		420	unblock_sig ();
		421	}
		422
		423	static void aio_grp_dec (aio_req grp)
		424	{
		425	--grp->size;
		426
		427	/* call feeder, if applicable */
		428	aio_grp_feed (grp);
		429
		430	/* finish, if done */
		431	if (!grp->size && grp->int1)
		432	{
		433	block_sig ();
		434
		435	if (!req_invoke (grp))
		436	{
		437	req_free (grp);
		438	unblock_sig ();
		439	croak (0);
		440	}
		441
		442	req_free (grp);
		443	unblock_sig ();
		444	}
		445	}
		446
		447	static int req_invoke (aio_req req)
87	{	448	{
88	dSP;	449	dSP;
89	int count = 0;
90	aio_req req, prv;
91		450
92	pthread_mutex_lock (&reslock);	451	if (req->flags & FLAG_SV1_RO_OFF)
		452	SvREADONLY_off (req->sv1);
93		453
94	{	454	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
95	/* read any signals sent by the worker threads */
96	char buf [32];
97	while (read (respipe [0], buf, 32) > 0)
98	;
99	}
100
101	req = ress;
102	ress = rese = 0;
103
104	pthread_mutex_unlock (&reslock);
105
106	while (req)
107	{	455	{
108	nreqs--;	456	ENTER;
		457	SAVETMPS;
		458	PUSHMARK (SP);
		459	EXTEND (SP, 1);
109		460
110	if (req->type == REQ_QUIT)	461	switch (req->type)
111	started--;
112	else
113	{	462	{
114	int errorno = errno;	463	case REQ_READDIR:
115	errno = req->errorno;
116
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{	464	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	465	SV *rv = &PL_sv_undef;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132		466
133	Safefree (req->statdata);	467	if (req->result >= 0)
		468	{
		469	int i;
		470	char *buf = req->ptr2;
		471	AV *av = newAV ();
		472
		473	av_extend (av, req->result - 1);
		474
		475	for (i = 0; i < req->result; ++i)
		476	{
		477	SV *sv = newSVpv (buf, 0);
		478
		479	av_store (av, i, sv);
		480	buf += SvCUR (sv) + 1;
		481	}
		482
		483	rv = sv_2mortal (newRV_noinc ((SV *)av));
		484	}
		485
		486	PUSHs (rv);
134	}	487	}
		488	break;
135		489
136	ENTER;	490	case REQ_OPEN:
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{	491	{
142	/* convert fd to fh */	492	/* convert fd to fh */
143	SV *fh;	493	SV *fh;
144		494
		495	PUSHs (sv_2mortal (newSViv (req->result)));
145	PUTBACK;	496	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	497	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147	SPAGAIN;	498	SPAGAIN;
148		499
149	fh = SvREFCNT_inc (POPs);	500	fh = POPs;
150
151	PUSHMARK (SP);	501	PUSHMARK (SP);
152	XPUSHs (sv_2mortal (fh));	502	XPUSHs (fh);
153	}	503	}
		504	break;
154		505
155	if (SvOK (req->callback))	506	case REQ_GROUP:
		507	req->int1 = 2; /* mark group as finished */
		508
		509	if (req->sv1)
156	{	510	{
157	PUTBACK;	511	int i;
158	call_sv (req->callback, G_VOID | G_EVAL);	512	AV *av = (AV *)req->sv1;
159	SPAGAIN;	513
		514	EXTEND (SP, AvFILL (av) + 1);
		515	for (i = 0; i <= AvFILL (av); ++i)
		516	PUSHs (*av_fetch (av, i, 0));
160	}	517	}
		518	break;
161		519
162	LEAVE;	520	case REQ_NOP:
		521	case REQ_BUSY:
		522	break;
		523
		524	case REQ_READLINK:
		525	if (req->result > 0)
163		526	{
164	if (req->callback)	527	SvCUR_set (req->sv1, req->result);
165	SvREFCNT_dec (req->callback);	528	*SvEND (req->sv1) = 0;
		529	PUSHs (req->sv1);
		530	}
		531	break;
166		532
167	errno = errorno;	533	case REQ_STAT:
168	count++;	534	case REQ_LSTAT:
		535	case REQ_FSTAT:
		536	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		537	PL_laststatval = req->result;
		538	PL_statcache = *(Stat_t *)(req->ptr2);
		539	PUSHs (sv_2mortal (newSViv (req->result)));
		540	break;
		541
		542	case REQ_READ:
		543	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		544	*SvEND (req->sv1) = 0;
		545	PUSHs (sv_2mortal (newSViv (req->result)));
		546	break;
		547
		548	default:
		549	PUSHs (sv_2mortal (newSViv (req->result)));
		550	break;
169	}	551	}
170		552
171	prv = req;	553	errno = req->errorno;
172	req = req->next;
173	Safefree (prv);
174		554
175	/* TODO: croak on errors? */	555	PUTBACK;
		556	call_sv (req->callback, G_VOID | G_EVAL);
		557	SPAGAIN;
		558
		559	FREETMPS;
		560	LEAVE;
176	}	561	}
177		562
178	return count;	563	if (req->grp)
		564	{
		565	aio_req grp = req->grp;
		566
		567	/* unlink request */
		568	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		569	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		570
		571	if (grp->grp_first == req)
		572	grp->grp_first = req->grp_next;
		573
		574	aio_grp_dec (grp);
		575	}
		576
		577	return !SvTRUE (ERRSV);
		578	}
		579
		580	static void req_free (aio_req req)
		581	{
		582	if (req->self)
		583	{
		584	sv_unmagic (req->self, PERL_MAGIC_ext);
		585	SvREFCNT_dec (req->self);
		586	}
		587
		588	SvREFCNT_dec (req->fh);
		589	SvREFCNT_dec (req->sv1);
		590	SvREFCNT_dec (req->sv2);
		591	SvREFCNT_dec (req->callback);
		592
		593	if (req->flags & FLAG_PTR2_FREE)
		594	free (req->ptr2);
		595
		596	Safefree (req);
		597	}
		598
		599	static void req_cancel_subs (aio_req grp)
		600	{
		601	aio_req sub;
		602
		603	if (grp->type != REQ_GROUP)
		604	return;
		605
		606	SvREFCNT_dec (grp->sv2);
		607	grp->sv2 = 0;
		608
		609	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		610	req_cancel (sub);
		611	}
		612
		613	static void req_cancel (aio_req req)
		614	{
		615	req->flags |= FLAG_CANCELLED;
		616
		617	req_cancel_subs (req);
179	}	618	}
180		619
181	static void *aio_proc(void *arg);	620	static void *aio_proc(void *arg);
182		621
183	static void
184	start_thread (void)	622	static void start_thread (void)
185	{	623	{
186	sigset_t fullsigset, oldsigset;	624	sigset_t fullsigset, oldsigset;
187	pthread_t tid;
188	pthread_attr_t attr;	625	pthread_attr_t attr;
		626
		627	worker *wrk = calloc (1, sizeof (worker));
		628
		629	if (!wrk)
		630	croak ("unable to allocate worker thread data");
189		631
190	pthread_attr_init (&attr);	632	pthread_attr_init (&attr);
191	pthread_attr_setstacksize (&attr, STACKSIZE);	633	pthread_attr_setstacksize (&attr, STACKSIZE);
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	634	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		635	#ifdef PTHREAD_SCOPE_PROCESS
		636	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		637	#endif
193		638
194	sigfillset (&fullsigset);	639	sigfillset (&fullsigset);
		640
		641	LOCK (wrklock);
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	642	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
196		643
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	644	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{	645	{
214	reqe->next = req;	646	wrk->prev = &wrk_first;
215	reqe = req;	647	wrk->next = wrk_first.next;
		648	wrk_first.next->prev = wrk;
		649	wrk_first.next = wrk;
		650	++started;
216	}	651	}
217	else	652	else
218	reqe = reqs = req;	653	free (wrk);
219		654
		655	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
		656	UNLOCK (wrklock);
		657	}
		658
		659	static void maybe_start_thread ()
		660	{
		661	if (get_nthreads () >= wanted)
		662	return;
		663
		664	/* todo: maybe use idle here, but might be less exact */
		665	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		666	return;
		667
		668	start_thread ();
		669	}
		670
		671	static void req_send (aio_req req)
		672	{
		673	block_sig ();
		674
		675	++nreqs;
		676
		677	LOCK (reqlock);
		678	++nready;
		679	reqq_push (&req_queue, req);
220	pthread_cond_signal (&reqwait);	680	pthread_cond_signal (&reqwait);
221	pthread_mutex_unlock (&reqlock);	681	UNLOCK (reqlock);
222		682
223	while (nreqs > max_outstanding)	683	unblock_sig ();
		684
		685	maybe_start_thread ();
		686	}
		687
		688	static void end_thread (void)
		689	{
		690	aio_req req;
		691
		692	Newz (0, req, 1, aio_cb);
		693
		694	req->type = REQ_QUIT;
		695	req->pri = PRI_MAX + PRI_BIAS;
		696
		697	LOCK (reqlock);
		698	reqq_push (&req_queue, req);
		699	pthread_cond_signal (&reqwait);
		700	UNLOCK (reqlock);
		701
		702	LOCK (wrklock);
		703	--started;
		704	UNLOCK (wrklock);
		705	}
		706
		707	static void set_max_idle (int nthreads)
		708	{
		709	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		710	max_idle = nthreads <= 0 ? 1 : nthreads;
		711	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		712	}
		713
		714	static void min_parallel (int nthreads)
		715	{
		716	if (wanted < nthreads)
		717	wanted = nthreads;
		718	}
		719
		720	static void max_parallel (int nthreads)
		721	{
		722	if (wanted > nthreads)
		723	wanted = nthreads;
		724
		725	while (started > wanted)
		726	end_thread ();
		727	}
		728
		729	static void poll_wait ()
		730	{
		731	fd_set rfd;
		732
		733	while (nreqs)
224	{	734	{
		735	int size;
		736	if (WORDACCESS_UNSAFE) LOCK (reslock);
		737	size = res_queue.size;
		738	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		739
		740	if (size)
		741	return;
		742
		743	maybe_start_thread ();
		744
		745	FD_ZERO(&rfd);
		746	FD_SET(respipe [0], &rfd);
		747
		748	select (respipe [0] + 1, &rfd, 0, 0, 0);
		749	}
		750	}
		751
		752	static int poll_cb ()
		753	{
		754	dSP;
		755	int count = 0;
		756	int maxreqs = max_poll_reqs;
		757	int do_croak = 0;
		758	struct timeval tv_start, tv_now;
		759	aio_req req;
		760
		761	if (max_poll_time)
		762	gettimeofday (&tv_start, 0);
		763
		764	block_sig ();
		765
		766	for (;;)
		767	{
		768	for (;;)
		769	{
		770	maybe_start_thread ();
		771
		772	LOCK (reslock);
		773	req = reqq_shift (&res_queue);
		774
		775	if (req)
		776	{
		777	--npending;
		778
		779	if (!res_queue.size)
		780	{
		781	/* read any signals sent by the worker threads */
		782	char buf [32];
		783	while (read (respipe [0], buf, 32) == 32)
		784	;
		785	}
		786	}
		787
		788	UNLOCK (reslock);
		789
		790	if (!req)
		791	break;
		792
		793	--nreqs;
		794
		795	if (req->type == REQ_GROUP && req->size)
		796	{
		797	req->int1 = 1; /* mark request as delayed */
		798	continue;
		799	}
		800	else
		801	{
		802	if (!req_invoke (req))
		803	{
		804	req_free (req);
		805	unblock_sig ();
		806	croak (0);
		807	}
		808
		809	count++;
		810	}
		811
		812	req_free (req);
		813
		814	if (maxreqs && !--maxreqs)
		815	break;
		816
		817	if (max_poll_time)
		818	{
		819	gettimeofday (&tv_now, 0);
		820
		821	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		822	break;
		823	}
		824	}
		825
		826	if (nreqs <= max_outstanding)
		827	break;
		828
225	poll_wait ();	829	poll_wait ();
226	poll_cb ();	830
		831	++maxreqs;
227	}	832	}
228	}
229		833
230	static void	834	unblock_sig ();
231	end_thread (void)	835	return count;
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}	836	}
239		837
		838	static void create_pipe ()
		839	{
		840	if (pipe (respipe))
		841	croak ("unable to initialize result pipe");
		842
		843	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
		844	croak ("cannot set result pipe to nonblocking mode");
		845
		846	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		847	croak ("cannot set result pipe to nonblocking mode");
		848	}
		849
		850	/*****************************************************************************/
240	/* work around various missing functions */	851	/* work around various missing functions */
241		852
242	#if !HAVE_PREADWRITE	853	#if !HAVE_PREADWRITE
243	# define pread aio_pread	854	# define pread aio_pread
244	# define pwrite aio_pwrite	855	# define pwrite aio_pwrite
…		…
246	/*	857	/*
247	* make our pread/pwrite safe against themselves, but not against	858	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,	859	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.	860	* but that's your problem, not mine.
250	*/	861	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	862	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
252		863
253	static ssize_t	864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{	865	{
256	ssize_t res;	866	ssize_t res;
257	off_t ooffset;	867	off_t ooffset;
258		868
259	pthread_mutex_lock (&iolock);	869	LOCK (preadwritelock);
260	ooffset = lseek (fd, 0, SEEK_CUR);	870	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);	871	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);	872	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);	873	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);	874	UNLOCK (preadwritelock);
265		875
266	return res;	876	return res;
267	}	877	}
268		878
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)	879	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
271	{	880	{
272	ssize_t res;	881	ssize_t res;
273	off_t ooffset;	882	off_t ooffset;
274		883
275	pthread_mutex_lock (&iolock);	884	LOCK (preadwritelock);
276	ooffset = lseek (fd, 0, SEEK_CUR);	885	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);	886	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);	887	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);	889	UNLOCK (preadwritelock);
281		890
282	return res;	891	return res;
283	}	892	}
284	#endif	893	#endif
285		894
286	#if !HAVE_FDATASYNC	895	#if !HAVE_FDATASYNC
287	# define fdatasync fsync	896	# define fdatasync fsync
288	#endif	897	#endif
289		898
290	#if !HAVE_READAHEAD	899	#if !HAVE_READAHEAD
291	# define readahead aio_readahead	900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
292		901
293	static char readahead_buf[4096];	902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{	903	{
		904	dBUF;
		905
298	while (count > 0)	906	while (count > 0)
299	{	907	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
301		909
302	pread (fd, readahead_buf, len, offset);	910	pread (fd, aio_buf, len, offset);
303	offset += len;	911	offset += len;
304	count -= len;	912	count -= len;
305	}	913	}
306		914
307	errno = 0;	915	errno = 0;
308	}	916	}
		917
309	#endif	918	#endif
310		919
311	static void *	920	#if !HAVE_READDIR_R
		921	# define readdir_r aio_readdir_r
		922
		923	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		924
		925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		926	{
		927	struct dirent *e;
		928	int errorno;
		929
		930	LOCK (readdirlock);
		931
		932	e = readdir (dirp);
		933	errorno = errno;
		934
		935	if (e)
		936	{
		937	*res = ent;
		938	strcpy (ent->d_name, e->d_name);
		939	}
		940	else
		941	*res = 0;
		942
		943	UNLOCK (readdirlock);
		944
		945	errno = errorno;
		946	return e ? 0 : -1;
		947	}
		948	#endif
		949
		950	/* sendfile always needs emulation */
		951	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		952	{
		953	ssize_t res;
		954
		955	if (!count)
		956	return 0;
		957
		958	#if HAVE_SENDFILE
		959	# if __linux
		960	res = sendfile (ofd, ifd, &offset, count);
		961
		962	# elif __freebsd
		963	/*
		964	* Of course, the freebsd sendfile is a dire hack with no thoughts
		965	* wasted on making it similar to other I/O functions.
		966	*/
		967	{
		968	off_t sbytes;
		969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		970
		971	if (res < 0 && sbytes)
		972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		973	res = sbytes;
		974	}
		975
		976	# elif __hpux
		977	res = sendfile (ofd, ifd, offset, count, 0, 0);
		978
		979	# elif __solaris
		980	{
		981	struct sendfilevec vec;
		982	size_t sbytes;
		983
		984	vec.sfv_fd = ifd;
		985	vec.sfv_flag = 0;
		986	vec.sfv_off = offset;
		987	vec.sfv_len = count;
		988
		989	res = sendfilev (ofd, &vec, 1, &sbytes);
		990
		991	if (res < 0 && sbytes)
		992	res = sbytes;
		993	}
		994
		995	# endif
		996	#else
		997	res = -1;
		998	errno = ENOSYS;
		999	#endif
		1000
		1001	if (res < 0
		1002	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1003	#if __solaris
		1004	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		1005	#endif
		1006	)
		1007	)
		1008	{
		1009	/* emulate sendfile. this is a major pain in the ass */
		1010	dBUF;
		1011
		1012	res = 0;
		1013
		1014	while (count)
		1015	{
		1016	ssize_t cnt;
		1017
		1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		1019
		1020	if (cnt <= 0)
		1021	{
		1022	if (cnt && !res) res = -1;
		1023	break;
		1024	}
		1025
		1026	cnt = write (ofd, aio_buf, cnt);
		1027
		1028	if (cnt <= 0)
		1029	{
		1030	if (cnt && !res) res = -1;
		1031	break;
		1032	}
		1033
		1034	offset += cnt;
		1035	res += cnt;
		1036	count -= cnt;
		1037	}
		1038	}
		1039
		1040	return res;
		1041	}
		1042
		1043	/* read a full directory */
		1044	static void scandir_ (aio_req req, worker *self)
		1045	{
		1046	DIR *dirp;
		1047	union
		1048	{
		1049	struct dirent d;
		1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		1051	} *u;
		1052	struct dirent *entp;
		1053	char *name, *names;
		1054	int memlen = 4096;
		1055	int memofs = 0;
		1056	int res = 0;
		1057	int errorno;
		1058
		1059	LOCK (wrklock);
		1060	self->dirp = dirp = opendir (req->ptr1);
		1061	self->dbuf = u = malloc (sizeof (*u));
		1062	req->flags |= FLAG_PTR2_FREE;
		1063	req->ptr2 = names = malloc (memlen);
		1064	UNLOCK (wrklock);
		1065
		1066	if (dirp && u && names)
		1067	for (;;)
		1068	{
		1069	errno = 0;
		1070	readdir_r (dirp, &u->d, &entp);
		1071
		1072	if (!entp)
		1073	break;
		1074
		1075	name = entp->d_name;
		1076
		1077	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1078	{
		1079	int len = strlen (name) + 1;
		1080
		1081	res++;
		1082
		1083	while (memofs + len > memlen)
		1084	{
		1085	memlen *= 2;
		1086	LOCK (wrklock);
		1087	req->ptr2 = names = realloc (names, memlen);
		1088	UNLOCK (wrklock);
		1089
		1090	if (!names)
		1091	break;
		1092	}
		1093
		1094	memcpy (names + memofs, name, len);
		1095	memofs += len;
		1096	}
		1097	}
		1098
		1099	if (errno)
		1100	res = -1;
		1101
		1102	req->result = res;
		1103	}
		1104
		1105	/*****************************************************************************/
		1106
312	aio_proc (void *thr_arg)	1107	static void *aio_proc (void *thr_arg)
313	{	1108	{
314	aio_req req;	1109	aio_req req;
315	int type;	1110	struct timespec ts;
		1111	worker *self = (worker *)thr_arg;
316		1112
317	do	1113	/* try to distribute timeouts somewhat evenly */
		1114	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1115	* (1000000000UL / 1024UL);
		1116
		1117	for (;;)
318	{	1118	{
319	pthread_mutex_lock (&reqlock);	1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1120
		1121	LOCK (reqlock);
320		1122
321	for (;;)	1123	for (;;)
322	{	1124	{
323	req = reqs;	1125	self->req = req = reqq_shift (&req_queue);
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330		1126
331	if (req)	1127	if (req)
332	break;	1128	break;
333		1129
		1130	++idle;
		1131
		1132	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1133	== ETIMEDOUT)
		1134	{
		1135	if (idle > max_idle)
		1136	{
		1137	--idle;
		1138	UNLOCK (reqlock);
		1139	LOCK (wrklock);
		1140	--started;
		1141	UNLOCK (wrklock);
		1142	goto quit;
		1143	}
		1144
		1145	/* we are allowed to idle, so do so without any timeout */
334	pthread_cond_wait (&reqwait, &reqlock);	1146	pthread_cond_wait (&reqwait, &reqlock);
		1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1148	}
		1149
		1150	--idle;
335	}	1151	}
336		1152
337	pthread_mutex_unlock (&reqlock);	1153	--nready;
		1154
		1155	UNLOCK (reqlock);
338		1156
339	errno = 0; /* strictly unnecessary */	1157	errno = 0; /* strictly unnecessary */
340		1158
341	type = req->type;	1159	if (!(req->flags & FLAG_CANCELLED))
342
343	switch (type)	1160	switch (req->type)
		1161	{
		1162	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
		1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
		1164
		1165	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1167
		1168	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1169	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1171
		1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1173	case REQ_CLOSE: req->result = close (req->int1); break;
		1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1176	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1177	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1178	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1179	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1180	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1181
		1182	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1183	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1184	case REQ_READDIR: scandir_ (req, self); break;
		1185
		1186	case REQ_BUSY:
		1187	{
		1188	struct timeval tv;
		1189
		1190	tv.tv_sec = req->int1;
		1191	tv.tv_usec = req->int2;
		1192
		1193	req->result = select (0, 0, 0, 0, &tv);
		1194	}
		1195
		1196	case REQ_GROUP:
		1197	case REQ_NOP:
		1198	break;
		1199
		1200	case REQ_QUIT:
		1201	goto quit;
		1202
		1203	default:
		1204	req->result = ENOSYS;
		1205	break;
		1206	}
		1207
		1208	req->errorno = errno;
		1209
		1210	LOCK (reslock);
		1211
		1212	++npending;
		1213
		1214	if (!reqq_push (&res_queue, req))
344	{	1215	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
347
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
349
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:
362	break;
363
364	default:
365	req->result = ENOSYS;
366	break;
367	}
368
369	req->errorno = errno;
370
371	pthread_mutex_lock (&reslock);
372
373	req->next = 0;
374
375	if (rese)
376	{
377	rese->next = req;
378	rese = req;
379	}
380	else
381	{
382	rese = ress = req;
383
384	/* write a dummy byte to the pipe so fh becomes ready */	1216	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);	1217	write (respipe [1], &respipe, 1);
		1218
		1219	/* optionally signal the main thread asynchronously */
		1220	if (main_sig)
		1221	pthread_kill (main_tid, main_sig);
386	}	1222	}
387		1223
388	pthread_mutex_unlock (&reslock);	1224	self->req = 0;
		1225	worker_clear (self);
		1226
		1227	UNLOCK (reslock);
389	}	1228	}
390	while (type != REQ_QUIT);	1229
		1230	quit:
		1231	LOCK (wrklock);
		1232	worker_free (self);
		1233	UNLOCK (wrklock);
391		1234
392	return 0;	1235	return 0;
393	}	1236	}
394		1237
		1238	/*****************************************************************************/
		1239
		1240	static void atfork_prepare (void)
		1241	{
		1242	LOCK (wrklock);
		1243	LOCK (reqlock);
		1244	LOCK (reslock);
		1245	#if !HAVE_PREADWRITE
		1246	LOCK (preadwritelock);
		1247	#endif
		1248	#if !HAVE_READDIR_R
		1249	LOCK (readdirlock);
		1250	#endif
		1251	}
		1252
		1253	static void atfork_parent (void)
		1254	{
		1255	#if !HAVE_READDIR_R
		1256	UNLOCK (readdirlock);
		1257	#endif
		1258	#if !HAVE_PREADWRITE
		1259	UNLOCK (preadwritelock);
		1260	#endif
		1261	UNLOCK (reslock);
		1262	UNLOCK (reqlock);
		1263	UNLOCK (wrklock);
		1264	}
		1265
		1266	static void atfork_child (void)
		1267	{
		1268	aio_req prv;
		1269
		1270	while (prv = reqq_shift (&req_queue))
		1271	req_free (prv);
		1272
		1273	while (prv = reqq_shift (&res_queue))
		1274	req_free (prv);
		1275
		1276	while (wrk_first.next != &wrk_first)
		1277	{
		1278	worker *wrk = wrk_first.next;
		1279
		1280	if (wrk->req)
		1281	req_free (wrk->req);
		1282
		1283	worker_clear (wrk);
		1284	worker_free (wrk);
		1285	}
		1286
		1287	started = 0;
		1288	idle = 0;
		1289	nreqs = 0;
		1290	nready = 0;
		1291	npending = 0;
		1292
		1293	close (respipe [0]);
		1294	close (respipe [1]);
		1295	create_pipe ();
		1296
		1297	atfork_parent ();
		1298	}
		1299
		1300	#define dREQ \
		1301	aio_req req; \
		1302	int req_pri = next_pri; \
		1303	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1304	\
		1305	if (SvOK (callback) && !SvROK (callback)) \
		1306	croak ("callback must be undef or of reference type"); \
		1307	\
		1308	Newz (0, req, 1, aio_cb); \
		1309	if (!req) \
		1310	croak ("out of memory during aio_req allocation"); \
		1311	\
		1312	req->callback = newSVsv (callback); \
		1313	req->pri = req_pri
		1314
		1315	#define REQ_SEND \
		1316	req_send (req); \
		1317	\
		1318	if (GIMME_V != G_VOID) \
		1319	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1320
395	MODULE = IO::AIO PACKAGE = IO::AIO	1321	MODULE = IO::AIO PACKAGE = IO::AIO
396		1322
397	PROTOTYPES: ENABLE	1323	PROTOTYPES: ENABLE
398		1324
399	BOOT:	1325	BOOT:
400	{	1326	{
401	if (pipe (respipe))	1327	HV *stash = gv_stashpv ("IO::AIO", 1);
402	croak ("unable to initialize result pipe");
403		1328
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1329	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
405	croak ("cannot set result pipe to nonblocking mode");	1330	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1331	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1332	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1333	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1334	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1335	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
406		1336
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1337	create_pipe ();
408	croak ("cannot set result pipe to nonblocking mode");	1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
409	}	1339	}
410		1340
411	void	1341	void
412	min_parallel(nthreads)	1342	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	1343	PROTOTYPE: $
415	CODE:	1344	CODE:
416	while (nthreads > started)	1345	max_poll_reqs = nreqs;
417	start_thread ();
418		1346
419	void	1347	void
420	max_parallel(nthreads)	1348	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	1349	PROTOTYPE: $
423	CODE:	1350	CODE:
424	{	1351	max_poll_time = nseconds * AIO_TICKS;
425	int cur = started;
426	while (cur > nthreads)
427	{
428	end_thread ();
429	cur--;
430	}
431		1352
432	while (started > nthreads)	1353	void
433	{	1354	min_parallel (int nthreads)
434	poll_wait ();	1355	PROTOTYPE: $
435	poll_cb ();	1356
436	}	1357	void
437	}	1358	max_parallel (int nthreads)
		1359	PROTOTYPE: $
		1360
		1361	void
		1362	max_idle (int nthreads)
		1363	PROTOTYPE: $
		1364	CODE:
		1365	set_max_idle (nthreads);
438		1366
439	int	1367	int
440	max_outstanding(nreqs)	1368	max_outstanding (int maxreqs)
441	int nreqs	1369	PROTOTYPE: $
442	PROTOTYPE: $
443	CODE:	1370	CODE:
444	RETVAL = max_outstanding;	1371	RETVAL = max_outstanding;
445	max_outstanding = nreqs;	1372	max_outstanding = maxreqs;
		1373	OUTPUT:
		1374	RETVAL
446		1375
447	void	1376	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
449	SV * pathname	1378	SV8 * pathname
450	int flags	1379	int flags
451	int mode	1380	int mode
452	SV * callback	1381	SV * callback
453	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
454	CODE:	1383	PPCODE:
455	{	1384	{
456	aio_req req;	1385	dREQ;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462		1386
463	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
466	req->fd = flags;	1390	req->int1 = flags;
467	req->mode = mode;	1391	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469		1392
470	send_req (req);	1393	REQ_SEND;
471	}	1394	}
472		1395
473	void	1396	void
474	aio_close(fh,callback=&PL_sv_undef)	1397	aio_close (fh,callback=&PL_sv_undef)
475	SV * fh	1398	SV * fh
476	SV * callback	1399	SV * callback
477	PROTOTYPE: $;$	1400	PROTOTYPE: $;$
478	ALIAS:	1401	ALIAS:
479	aio_close = REQ_CLOSE	1402	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC	1403	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC	1404	aio_fdatasync = REQ_FDATASYNC
482	CODE:	1405	PPCODE:
483	{	1406	{
484	aio_req req;	1407	dREQ;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490		1408
491	req->type = ix;	1409	req->type = ix;
492	req->fh = newSVsv (fh);	1410	req->fh = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495		1412
496	send_req (req);	1413	REQ_SEND (req);
497	}	1414	}
498		1415
499	void	1416	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501	SV * fh	1418	SV * fh
502	UV offset	1419	UV offset
503	IV length	1420	UV length
504	SV * data	1421	SV8 * data
505	IV dataoffset	1422	UV dataoffset
506	SV * callback	1423	SV * callback
507	ALIAS:	1424	ALIAS:
508	aio_read = REQ_READ	1425	aio_read = REQ_READ
509	aio_write = REQ_WRITE	1426	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$	1427	PROTOTYPE: $$$$$;$
511	CODE:	1428	PPCODE:
512	{	1429	{
513	aio_req req;
514	STRLEN svlen;	1430	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);	1431	char *svptr = SvPVbyte (data, svlen);
516		1432
517	SvUPGRADE (data, SVt_PV);	1433	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);	1434	SvPOK_on (data);
519		1435
520	if (dataoffset < 0)	1436	if (dataoffset < 0)
…		…
536	}	1452	}
537		1453
538	if (length < 0)	1454	if (length < 0)
539	croak ("length must not be negative");	1455	croak ("length must not be negative");
540		1456
541	Newz (0, req, 1, aio_cb);	1457	{
		1458	dREQ;
542		1459
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;	1460	req->type = ix;
547	req->fh = newSVsv (fh);	1461	req->fh = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));	1463	: IoOFP (sv_2io (fh)));
550	req->offset = offset;	1464	req->offs = offset;
551	req->length = length;	1465	req->size = length;
552	req->data = SvREFCNT_inc (data);	1466	req->sv1 = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;	1467	req->ptr1 = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);	1468	req->stroffset = dataoffset;
555		1469
556	send_req (req);	1470	if (!SvREADONLY (data))
557	}	1471	{
		1472	SvREADONLY_on (data);
		1473	req->flags |= FLAG_SV1_RO_OFF;
		1474	}
558		1475
		1476	REQ_SEND;
		1477	}
		1478	}
		1479
559	void	1480	void
		1481	aio_readlink (path,callback=&PL_sv_undef)
		1482	SV8 * path
		1483	SV * callback
		1484	PROTOTYPE: $$;$
		1485	PPCODE:
		1486	{
		1487	SV *data;
		1488	dREQ;
		1489
		1490	data = newSV (NAME_MAX);
		1491	SvPOK_on (data);
		1492
		1493	req->type = REQ_READLINK;
		1494	req->fh = newSVsv (path);
		1495	req->ptr2 = SvPVbyte_nolen (req->fh);
		1496	req->sv1 = data;
		1497	req->ptr1 = SvPVbyte_nolen (data);
		1498
		1499	REQ_SEND;
		1500	}
		1501
		1502	void
		1503	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1504	SV * out_fh
		1505	SV * in_fh
		1506	UV in_offset
		1507	UV length
		1508	SV * callback
		1509	PROTOTYPE: $$$$;$
		1510	PPCODE:
		1511	{
		1512	dREQ;
		1513
		1514	req->type = REQ_SENDFILE;
		1515	req->fh = newSVsv (out_fh);
		1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1517	req->sv2 = newSVsv (in_fh);
		1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1519	req->offs = in_offset;
		1520	req->size = length;
		1521
		1522	REQ_SEND;
		1523	}
		1524
		1525	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1526	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
561	SV * fh	1527	SV * fh
562	UV offset	1528	UV offset
563	IV length	1529	IV length
564	SV * callback	1530	SV * callback
565	PROTOTYPE: $$$;$	1531	PROTOTYPE: $$$;$
566	CODE:	1532	PPCODE:
567	{	1533	{
568	aio_req req;	1534	dREQ;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577		1535
578	req->type = REQ_READAHEAD;	1536	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);	1537	req->fh = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;	1539	req->offs = offset;
582	req->length = length;	1540	req->size = length;
583	req->callback = SvREFCNT_inc (callback);
584		1541
585	send_req (req);	1542	REQ_SEND;
586	}	1543	}
587		1544
588	void	1545	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)	1546	aio_stat (fh_or_path,callback=&PL_sv_undef)
590	SV * fh_or_path	1547	SV8 * fh_or_path
591	SV * callback	1548	SV * callback
592	ALIAS:	1549	ALIAS:
593	aio_stat = REQ_STAT	1550	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT	1551	aio_lstat = REQ_LSTAT
595	CODE:	1552	PPCODE:
596	{	1553	{
597	aio_req req;	1554	dREQ;
598		1555
599	Newz (0, req, 1, aio_cb);	1556	req->ptr2 = malloc (sizeof (Stat_t));
600
601	if (!req)	1557	if (!req->ptr2)
602	croak ("out of memory during aio_req allocation");	1558	{
603		1559	req_free (req);
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");	1560	croak ("out of memory during aio_stat statdata allocation");
		1561	}
		1562
		1563	req->flags |= FLAG_PTR2_FREE;
608		1564
609	if (SvPOK (fh_or_path))	1565	if (SvPOK (fh_or_path))
610	{	1566	{
611	req->type = ix;	1567	req->type = ix;
612	req->data = newSVsv (fh_or_path);	1568	req->sv1 = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);	1569	req->ptr1 = SvPVbyte_nolen (req->sv1);
614	}	1570	}
615	else	1571	else
616	{	1572	{
617	req->type = REQ_FSTAT;	1573	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);	1574	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}	1576	}
621		1577
622	req->callback = SvREFCNT_inc (callback);	1578	REQ_SEND;
623
624	send_req (req);
625	}	1579	}
626		1580
627	void	1581	void
628	aio_unlink(pathname,callback=&PL_sv_undef)	1582	aio_unlink (pathname,callback=&PL_sv_undef)
629	SV * pathname	1583	SV8 * pathname
630	SV * callback	1584	SV * callback
		1585	ALIAS:
		1586	aio_unlink = REQ_UNLINK
		1587	aio_rmdir = REQ_RMDIR
		1588	aio_readdir = REQ_READDIR
		1589	PPCODE:
		1590	{
		1591	dREQ;
		1592
		1593	req->type = ix;
		1594	req->sv1 = newSVsv (pathname);
		1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1596
		1597	REQ_SEND;
		1598	}
		1599
		1600	void
		1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1602	SV8 * oldpath
		1603	SV8 * newpath
		1604	SV * callback
		1605	ALIAS:
		1606	aio_link = REQ_LINK
		1607	aio_symlink = REQ_SYMLINK
		1608	aio_rename = REQ_RENAME
		1609	PPCODE:
		1610	{
		1611	dREQ;
		1612
		1613	req->type = ix;
		1614	req->fh = newSVsv (oldpath);
		1615	req->ptr2 = SvPVbyte_nolen (req->fh);
		1616	req->sv1 = newSVsv (newpath);
		1617	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1618
		1619	REQ_SEND;
		1620	}
		1621
		1622	void
		1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1624	SV8 * pathname
		1625	SV * callback
		1626	UV mode
		1627	UV dev
		1628	PPCODE:
		1629	{
		1630	dREQ;
		1631
		1632	req->type = REQ_MKNOD;
		1633	req->sv1 = newSVsv (pathname);
		1634	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1635	req->mode = (mode_t)mode;
		1636	req->offs = dev;
		1637
		1638	REQ_SEND;
		1639	}
		1640
		1641	void
		1642	aio_busy (delay,callback=&PL_sv_undef)
		1643	double delay
		1644	SV * callback
		1645	PPCODE:
		1646	{
		1647	dREQ;
		1648
		1649	req->type = REQ_BUSY;
		1650	req->int1 = delay < 0. ? 0 : delay;
		1651	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
		1652
		1653	REQ_SEND;
		1654	}
		1655
		1656	void
		1657	aio_group (callback=&PL_sv_undef)
		1658	SV * callback
		1659	PROTOTYPE: ;$
		1660	PPCODE:
		1661	{
		1662	dREQ;
		1663
		1664	req->type = REQ_GROUP;
		1665
		1666	req_send (req);
		1667	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1668	}
		1669
		1670	void
		1671	aio_nop (callback=&PL_sv_undef)
		1672	SV * callback
		1673	PPCODE:
		1674	{
		1675	dREQ;
		1676
		1677	req->type = REQ_NOP;
		1678
		1679	REQ_SEND;
		1680	}
		1681
		1682	int
		1683	aioreq_pri (int pri = 0)
		1684	PROTOTYPE: ;$
631	CODE:	1685	CODE:
632	{	1686	RETVAL = next_pri - PRI_BIAS;
633	aio_req req;	1687	if (items > 0)
634		1688	{
635	Newz (0, req, 1, aio_cb);	1689	if (pri < PRI_MIN) pri = PRI_MIN;
636		1690	if (pri > PRI_MAX) pri = PRI_MAX;
637	if (!req)	1691	next_pri = pri + PRI_BIAS;
638	croak ("out of memory during aio_req allocation");	1692	}
639		1693	OUTPUT:
640	req->type = REQ_UNLINK;	1694	RETVAL
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647		1695
648	void	1696	void
		1697	aioreq_nice (int nice = 0)
		1698	CODE:
		1699	nice = next_pri - nice;
		1700	if (nice < PRI_MIN) nice = PRI_MIN;
		1701	if (nice > PRI_MAX) nice = PRI_MAX;
		1702	next_pri = nice + PRI_BIAS;
		1703
		1704	void
649	flush()	1705	flush ()
650	PROTOTYPE:	1706	PROTOTYPE:
651	CODE:	1707	CODE:
652	while (nreqs)	1708	while (nreqs)
653	{	1709	{
654	poll_wait ();	1710	poll_wait ();
655	poll_cb ();	1711	poll_cb ();
656	}	1712	}
657		1713
658	void	1714	int
659	poll()	1715	poll()
660	PROTOTYPE:	1716	PROTOTYPE:
661	CODE:	1717	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	1718	poll_wait ();
665	poll_cb ();	1719	RETVAL = poll_cb ();
666	}	1720	OUTPUT:
		1721	RETVAL
667		1722
668	int	1723	int
669	poll_fileno()	1724	poll_fileno()
670	PROTOTYPE:	1725	PROTOTYPE:
671	CODE:	1726	CODE:
…		…
683		1738
684	void	1739	void
685	poll_wait()	1740	poll_wait()
686	PROTOTYPE:	1741	PROTOTYPE:
687	CODE:	1742	CODE:
688	if (nreqs)
689	poll_wait ();	1743	poll_wait ();
		1744
		1745	void
		1746	setsig (int signum = SIGIO)
		1747	PROTOTYPE: ;$
		1748	CODE:
		1749	{
		1750	if (block_sig_level)
		1751	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1752
		1753	LOCK (reslock);
		1754	main_tid = pthread_self ();
		1755	main_sig = signum;
		1756	UNLOCK (reslock);
		1757
		1758	if (main_sig && npending)
		1759	pthread_kill (main_tid, main_sig);
		1760	}
		1761
		1762	void
		1763	aio_block (SV *cb)
		1764	PROTOTYPE: &
		1765	PPCODE:
		1766	{
		1767	int count;
		1768
		1769	block_sig ();
		1770	PUSHMARK (SP);
		1771	PUTBACK;
		1772	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1773	SPAGAIN;
		1774	unblock_sig ();
		1775
		1776	if (SvTRUE (ERRSV))
		1777	croak (0);
		1778
		1779	XSRETURN (count);
		1780	}
690		1781
691	int	1782	int
692	nreqs()	1783	nreqs()
693	PROTOTYPE:	1784	PROTOTYPE:
694	CODE:	1785	CODE:
695	RETVAL = nreqs;	1786	RETVAL = nreqs;
696	OUTPUT:	1787	OUTPUT:
697	RETVAL	1788	RETVAL
698		1789
		1790	int
		1791	nready()
		1792	PROTOTYPE:
		1793	CODE:
		1794	RETVAL = get_nready ();
		1795	OUTPUT:
		1796	RETVAL
		1797
		1798	int
		1799	npending()
		1800	PROTOTYPE:
		1801	CODE:
		1802	RETVAL = get_npending ();
		1803	OUTPUT:
		1804	RETVAL
		1805
		1806	int
		1807	nthreads()
		1808	PROTOTYPE:
		1809	CODE:
		1810	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1811	RETVAL = started;
		1812	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1813	OUTPUT:
		1814	RETVAL
		1815
		1816	PROTOTYPES: DISABLE
		1817
		1818	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1819
		1820	void
		1821	cancel (aio_req_ornot req)
		1822	CODE:
		1823	req_cancel (req);
		1824
		1825	void
		1826	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1827	CODE:
		1828	SvREFCNT_dec (req->callback);
		1829	req->callback = newSVsv (callback);
		1830
		1831	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1832
		1833	void
		1834	add (aio_req grp, ...)
		1835	PPCODE:
		1836	{
		1837	int i;
		1838	aio_req req;
		1839
		1840	if (main_sig && !block_sig_level)
		1841	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1842
		1843	if (grp->int1 == 2)
		1844	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1845
		1846	for (i = 1; i < items; ++i )
		1847	{
		1848	if (GIMME_V != G_VOID)
		1849	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1850
		1851	req = SvAIO_REQ (ST (i));
		1852
		1853	if (req)
		1854	{
		1855	++grp->size;
		1856	req->grp = grp;
		1857
		1858	req->grp_prev = 0;
		1859	req->grp_next = grp->grp_first;
		1860
		1861	if (grp->grp_first)
		1862	grp->grp_first->grp_prev = req;
		1863
		1864	grp->grp_first = req;
		1865	}
		1866	}
		1867	}
		1868
		1869	void
		1870	cancel_subs (aio_req_ornot req)
		1871	CODE:
		1872	req_cancel_subs (req);
		1873
		1874	void
		1875	result (aio_req grp, ...)
		1876	CODE:
		1877	{
		1878	int i;
		1879	AV *av;
		1880
		1881	grp->errorno = errno;
		1882
		1883	av = newAV ();
		1884
		1885	for (i = 1; i < items; ++i )
		1886	av_push (av, newSVsv (ST (i)));
		1887
		1888	SvREFCNT_dec (grp->sv1);
		1889	grp->sv1 = (SV *)av;
		1890	}
		1891
		1892	void
		1893	errno (aio_req grp, int errorno = errno)
		1894	CODE:
		1895	grp->errorno = errorno;
		1896
		1897	void
		1898	limit (aio_req grp, int limit)
		1899	CODE:
		1900	grp->int2 = limit;
		1901	aio_grp_feed (grp);
		1902
		1903	void
		1904	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1905	CODE:
		1906	{
		1907	SvREFCNT_dec (grp->sv2);
		1908	grp->sv2 = newSVsv (callback);
		1909
		1910	if (grp->int2 <= 0)
		1911	grp->int2 = 2;
		1912
		1913	aio_grp_feed (grp);
		1914	}
		1915

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