ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.101 by root, Fri Jun 1 13:25:51 2007 UTC

1	#define _REENTRANT 1	1	#include "xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "autoconf/config.h"
9		10
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
12	#include <sys/types.h>	16	#include <sys/types.h>
13	#include <sys/stat.h>	17	#include <sys/stat.h>
14		18	#include <limits.h>
15	#include <unistd.h>	19	#include <unistd.h>
16	#include <fcntl.h>	20	#include <fcntl.h>
17	#include <signal.h>	21	#include <signal.h>
18	#include <sched.h>	22	#include <sched.h>
		23	#include <utime.h>
19		24
20	#if HAVE_SENDFILE	25	#if HAVE_SENDFILE
21	# if __linux	26	# if __linux
22	# include <sys/sendfile.h>	27	# include <sys/sendfile.h>
23	# elif __freebsd	28	# elif __freebsd
24	# include <sys/socket.h>	29	# include <sys/socket.h>
25	# include <sys/uio.h>	30	# include <sys/uio.h>
26	# elif __hpux	31	# elif __hpux
27	# include <sys/socket.h>	32	# include <sys/socket.h>
		33	# elif __solaris /* not yet */
		34	# include <sys/sendfile.h>
28	# else	35	# else
29	# error sendfile support requested but not available	36	# error sendfile support requested but not available
30	# endif	37	# endif
31	#endif	38	#endif
32		39
33	#if __ia64	40	/* number of seconds after which idle threads exit */
		41	#define IDLE_TIMEOUT 10
		42
		43	/* used for struct dirent, AIX doesn't provide it */
		44	#ifndef NAME_MAX
		45	# define NAME_MAX 4096
		46	#endif
		47
		48	/* buffer size for various temporary buffers */
34	# define STACKSIZE 65536	49	#define AIO_BUFSIZE 65536
		50
		51	/* use NV for 32 bit perls as it allows larger offsets */
		52	#if IVSIZE >= 8
		53	# define SvVAL64 SvIV
35	#else	54	#else
36	# define STACKSIZE 4096	55	# define SvVAL64 SvNV
37	#endif	56	#endif
		57
		58	#define dBUF \
		59	char *aio_buf; \
		60	LOCK (wrklock); \
		61	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		62	UNLOCK (wrklock); \
		63	if (!aio_buf) \
		64	return -1;
		65
		66	typedef SV SV8; /* byte-sv, used for argument-checking */
38		67
39	enum {	68	enum {
40	REQ_QUIT,	69	REQ_QUIT,
41	REQ_OPEN, REQ_CLOSE,	70	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,	71	REQ_READ, REQ_WRITE,
43	REQ_SENDFILE,	72	REQ_READAHEAD, REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	73	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		74	REQ_UTIME, REQ_FUTIME,
		75	REQ_CHMOD, REQ_FCHMOD,
		76	REQ_CHOWN, REQ_FCHOWN,
45	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
47	REQ_SYMLINK,	79	REQ_MKNOD, REQ_READDIR,
		80	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
48	};	83	};
49		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
50	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
51	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
52		91
		92	SV *callback;
		93	SV *sv1, *sv2;
		94	void *ptr1, *ptr2;
		95	off_t offs;
		96	size_t size;
		97	ssize_t result;
		98	double nv1, nv2;
		99
		100	STRLEN stroffset;
53	int type;	101	int type;
54		102	int int1, int2, int3;
55	int fd, fd2;	103	int errorno;
56	off_t offset;
57	size_t length;
58	ssize_t result;
59	mode_t mode; /* open */	104	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65		105
66	Stat_t *statdata;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV *self; /* the perl counterpart of this request, if any */
		110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
67	} aio_cb;	111	} aio_cb;
68		112
		113	enum {
		114	FLAG_CANCELLED = 0x01, /* request was cancelled */
		115	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		116	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		117	};
		118
69	typedef aio_cb *aio_req;	119	typedef aio_cb *aio_req;
		120	typedef aio_cb *aio_req_ornot;
70		121
		122	enum {
		123	PRI_MIN = -4,
		124	PRI_MAX = 4,
		125
		126	DEFAULT_PRI = 0,
		127	PRI_BIAS = -PRI_MIN,
		128	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		129	};
		130
		131	#define AIO_TICKS ((1000000 + 1023) >> 10)
		132
		133	static unsigned int max_poll_time = 0;
		134	static unsigned int max_poll_reqs = 0;
		135
		136	/* calculcate time difference in ~1/AIO_TICKS of a second */
		137	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		138	{
		139	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		140	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		141	}
		142
		143	static thread_t main_tid;
		144	static int main_sig;
		145	static int block_sig_level;
		146
		147	void block_sig ()
		148	{
		149	sigset_t ss;
		150
		151	if (block_sig_level++)
		152	return;
		153
		154	if (!main_sig)
		155	return;
		156
		157	sigemptyset (&ss);
		158	sigaddset (&ss, main_sig);
		159	pthread_sigmask (SIG_BLOCK, &ss, 0);
		160	}
		161
		162	void unblock_sig ()
		163	{
		164	sigset_t ss;
		165
		166	if (--block_sig_level)
		167	return;
		168
		169	if (!main_sig)
		170	return;
		171
		172	sigemptyset (&ss);
		173	sigaddset (&ss, main_sig);
		174	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		175	}
		176
		177	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		178
71	static int started, wanted;	179	static unsigned int started, idle, wanted;
72	static volatile int nreqs;	180
73	static int max_outstanding = 1<<30;	181	/* worker threads management */
		182	static mutex_t wrklock = MUTEX_INIT;
		183
		184	typedef struct worker {
		185	/* locked by wrklock */
		186	struct worker *prev, *next;
		187
		188	thread_t tid;
		189
		190	/* locked by reslock, reqlock or wrklock */
		191	aio_req req; /* currently processed request */
		192	void *dbuf;
		193	DIR *dirp;
		194	} worker;
		195
		196	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		197
		198	static void worker_clear (worker *wrk)
		199	{
		200	if (wrk->dirp)
		201	{
		202	closedir (wrk->dirp);
		203	wrk->dirp = 0;
		204	}
		205
		206	if (wrk->dbuf)
		207	{
		208	free (wrk->dbuf);
		209	wrk->dbuf = 0;
		210	}
		211	}
		212
		213	static void worker_free (worker *wrk)
		214	{
		215	wrk->next->prev = wrk->prev;
		216	wrk->prev->next = wrk->next;
		217
		218	free (wrk);
		219	}
		220
		221	static volatile unsigned int nreqs, nready, npending;
		222	static volatile unsigned int max_idle = 4;
		223	static volatile unsigned int max_outstanding = 0xffffffff;
74	static int respipe [2];	224	static int respipe [2];
75		225
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	226	static mutex_t reslock = MUTEX_INIT;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	227	static mutex_t reqlock = MUTEX_INIT;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	228	static cond_t reqwait = COND_INIT;
79		229
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	#if WORDACCESS_UNSAFE
81	static volatile aio_req ress, rese; /* queue start, queue end */
82		231
83	static void free_req (aio_req req)	232	static unsigned int get_nready ()
84	{	233	{
85	if (req->data)	234	unsigned int retval;
86	SvREFCNT_dec (req->data);
87		235
88	if (req->fh)	236	LOCK (reqlock);
89	SvREFCNT_dec (req->fh);	237	retval = nready;
		238	UNLOCK (reqlock);
90		239
91	if (req->fh2)	240	return retval;
92	SvREFCNT_dec (req->fh2);
93
94	if (req->statdata)
95	Safefree (req->statdata);
96
97	if (req->callback)
98	SvREFCNT_dec (req->callback);
99
100	Safefree (req);
101	}	241	}
102		242
103	static void	243	static unsigned int get_npending ()
104	poll_wait ()
105	{	244	{
106	if (nreqs && !ress)	245	unsigned int retval;
		246
		247	LOCK (reslock);
		248	retval = npending;
		249	UNLOCK (reslock);
		250
		251	return retval;
		252	}
		253
		254	static unsigned int get_nthreads ()
		255	{
		256	unsigned int retval;
		257
		258	LOCK (wrklock);
		259	retval = started;
		260	UNLOCK (wrklock);
		261
		262	return retval;
		263	}
		264
		265	#else
		266
		267	# define get_nready() nready
		268	# define get_npending() npending
		269	# define get_nthreads() started
		270
		271	#endif
		272
		273	/*
		274	* a somewhat faster data structure might be nice, but
		275	* with 8 priorities this actually needs <20 insns
		276	* per shift, the most expensive operation.
		277	*/
		278	typedef struct {
		279	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		280	int size;
		281	} reqq;
		282
		283	static reqq req_queue;
		284	static reqq res_queue;
		285
		286	int reqq_push (reqq *q, aio_req req)
		287	{
		288	int pri = req->pri;
		289	req->next = 0;
		290
		291	if (q->qe[pri])
107	{	292	{
108	fd_set rfd;	293	q->qe[pri]->next = req;
109	FD_ZERO(&rfd);	294	q->qe[pri] = req;
110	FD_SET(respipe [0], &rfd);
111
112	select (respipe [0] + 1, &rfd, 0, 0, 0);
113	}	295	}
114	}	296	else
		297	q->qe[pri] = q->qs[pri] = req;
115		298
116	static int	299	return q->size++;
117	poll_cb ()	300	}
118	{
119	dSP;
120	int count = 0;
121	int do_croak = 0;
122	aio_req req;
123		301
124	for (;;)	302	aio_req reqq_shift (reqq *q)
		303	{
		304	int pri;
		305
		306	if (!q->size)
		307	return 0;
		308
		309	--q->size;
		310
		311	for (pri = NUM_PRI; pri--; )
125	{	312	{
126	pthread_mutex_lock (&reslock);	313	aio_req req = q->qs[pri];
127	req = ress;
128		314
129	if (req)	315	if (req)
130	{	316	{
131	ress = req->next;	317	if (!(q->qs[pri] = req->next))
		318	q->qe[pri] = 0;
132		319
133	if (!ress)	320	return req;
		321	}
		322	}
		323
		324	abort ();
		325	}
		326
		327	static int poll_cb ();
		328	static int req_invoke (aio_req req);
		329	static void req_destroy (aio_req req);
		330	static void req_cancel (aio_req req);
		331
		332	/* must be called at most once */
		333	static SV *req_sv (aio_req req, const char *klass)
		334	{
		335	if (!req->self)
		336	{
		337	req->self = (SV *)newHV ();
		338	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		339	}
		340
		341	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		342	}
		343
		344	static aio_req SvAIO_REQ (SV *sv)
		345	{
		346	MAGIC *mg;
		347
		348	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		349	croak ("object of class " AIO_REQ_KLASS " expected");
		350
		351	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		352
		353	return mg ? (aio_req)mg->mg_ptr : 0;
		354	}
		355
		356	static void aio_grp_feed (aio_req grp)
		357	{
		358	block_sig ();
		359
		360	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		361	{
		362	int old_len = grp->size;
		363
		364	if (grp->sv2 && SvOK (grp->sv2))
		365	{
		366	dSP;
		367
		368	ENTER;
		369	SAVETMPS;
		370	PUSHMARK (SP);
		371	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		372	PUTBACK;
		373	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		374	SPAGAIN;
		375	FREETMPS;
		376	LEAVE;
		377	}
		378
		379	/* stop if no progress has been made */
		380	if (old_len == grp->size)
		381	{
		382	SvREFCNT_dec (grp->sv2);
		383	grp->sv2 = 0;
		384	break;
		385	}
		386	}
		387
		388	unblock_sig ();
		389	}
		390
		391	static void aio_grp_dec (aio_req grp)
		392	{
		393	--grp->size;
		394
		395	/* call feeder, if applicable */
		396	aio_grp_feed (grp);
		397
		398	/* finish, if done */
		399	if (!grp->size && grp->int1)
		400	{
		401	block_sig ();
		402
		403	if (!req_invoke (grp))
		404	{
		405	req_destroy (grp);
		406	unblock_sig ();
		407	croak (0);
		408	}
		409
		410	req_destroy (grp);
		411	unblock_sig ();
		412	}
		413	}
		414
		415	static int req_invoke (aio_req req)
		416	{
		417	dSP;
		418
		419	if (req->flags & FLAG_SV2_RO_OFF)
		420	SvREADONLY_off (req->sv2);
		421
		422	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		423	{
		424	ENTER;
		425	SAVETMPS;
		426	PUSHMARK (SP);
		427	EXTEND (SP, 1);
		428
		429	switch (req->type)
		430	{
		431	case REQ_READDIR:
134	{	432	{
135	/* read any signals sent by the worker threads */	433	SV *rv = &PL_sv_undef;
136	char buf [32];	434
137	while (read (respipe [0], buf, 32) == 32)	435	if (req->result >= 0)
138	;	436	{
		437	int i;
		438	char *buf = req->ptr2;
		439	AV *av = newAV ();
139		440
140	rese = 0;	441	av_extend (av, req->result - 1);
		442
		443	for (i = 0; i < req->result; ++i)
		444	{
		445	SV *sv = newSVpv (buf, 0);
		446
		447	av_store (av, i, sv);
		448	buf += SvCUR (sv) + 1;
		449	}
		450
		451	rv = sv_2mortal (newRV_noinc ((SV *)av));
		452	}
		453
		454	PUSHs (rv);
141	}	455	}
142	}
143
144	pthread_mutex_unlock (&reslock);
145
146	if (!req)
147	break;	456	break;
148		457
149	nreqs--;	458	case REQ_OPEN:
150
151	if (req->type == REQ_QUIT)
152	started--;
153	else
154	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);
163
164	if (req->statdata)
165	{
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);
169	}
170
171	ENTER;
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174
175	if (req->type == REQ_OPEN)
176	{	459	{
177	/* convert fd to fh */	460	/* convert fd to fh */
178	SV *fh;	461	SV *fh;
179		462
		463	PUSHs (sv_2mortal (newSViv (req->result)));
180	PUTBACK;	464	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	465	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
182	SPAGAIN;	466	SPAGAIN;
183		467
184	fh = SvREFCNT_inc (POPs);	468	fh = POPs;
185
186	PUSHMARK (SP);	469	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));	470	XPUSHs (fh);
188	}	471	}
		472	break;
189		473
190	if (SvOK (req->callback))	474	case REQ_GROUP:
		475	req->int1 = 2; /* mark group as finished */
		476
		477	if (req->sv1)
		478	{
		479	int i;
		480	AV *av = (AV *)req->sv1;
		481
		482	EXTEND (SP, AvFILL (av) + 1);
		483	for (i = 0; i <= AvFILL (av); ++i)
		484	PUSHs (*av_fetch (av, i, 0));
		485	}
		486	break;
		487
		488	case REQ_NOP:
		489	case REQ_BUSY:
		490	break;
		491
		492	case REQ_READLINK:
		493	if (req->result > 0)
		494	{
		495	SvCUR_set (req->sv2, req->result);
		496	*SvEND (req->sv2) = 0;
		497	PUSHs (req->sv2);
		498	}
		499	break;
		500
		501	case REQ_STAT:
		502	case REQ_LSTAT:
		503	case REQ_FSTAT:
		504	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		505	PL_laststatval = req->result;
		506	PL_statcache = *(Stat_t *)(req->ptr2);
		507	PUSHs (sv_2mortal (newSViv (req->result)));
		508	break;
		509
		510	case REQ_READ:
		511	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		512	*SvEND (req->sv2) = 0;
		513	PUSHs (sv_2mortal (newSViv (req->result)));
		514	break;
		515
		516	default:
		517	PUSHs (sv_2mortal (newSViv (req->result)));
		518	break;
		519	}
		520
		521	errno = req->errorno;
		522
		523	PUTBACK;
		524	call_sv (req->callback, G_VOID | G_EVAL);
		525	SPAGAIN;
		526
		527	FREETMPS;
		528	LEAVE;
		529	}
		530
		531	if (req->grp)
		532	{
		533	aio_req grp = req->grp;
		534
		535	/* unlink request */
		536	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		537	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		538
		539	if (grp->grp_first == req)
		540	grp->grp_first = req->grp_next;
		541
		542	aio_grp_dec (grp);
		543	}
		544
		545	return !SvTRUE (ERRSV);
		546	}
		547
		548	static void req_destroy (aio_req req)
		549	{
		550	if (req->self)
		551	{
		552	sv_unmagic (req->self, PERL_MAGIC_ext);
		553	SvREFCNT_dec (req->self);
		554	}
		555
		556	SvREFCNT_dec (req->sv1);
		557	SvREFCNT_dec (req->sv2);
		558	SvREFCNT_dec (req->callback);
		559
		560	if (req->flags & FLAG_PTR2_FREE)
		561	free (req->ptr2);
		562
		563	Safefree (req);
		564	}
		565
		566	static void req_cancel_subs (aio_req grp)
		567	{
		568	aio_req sub;
		569
		570	if (grp->type != REQ_GROUP)
		571	return;
		572
		573	SvREFCNT_dec (grp->sv2);
		574	grp->sv2 = 0;
		575
		576	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		577	req_cancel (sub);
		578	}
		579
		580	static void req_cancel (aio_req req)
		581	{
		582	req->flags |= FLAG_CANCELLED;
		583
		584	req_cancel_subs (req);
		585	}
		586
		587	static void *aio_proc (void *arg);
		588
		589	static void start_thread (void)
		590	{
		591	worker *wrk = calloc (1, sizeof (worker));
		592
		593	if (!wrk)
		594	croak ("unable to allocate worker thread data");
		595
		596	LOCK (wrklock);
		597
		598	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
		599	{
		600	wrk->prev = &wrk_first;
		601	wrk->next = wrk_first.next;
		602	wrk_first.next->prev = wrk;
		603	wrk_first.next = wrk;
		604	++started;
		605	}
		606	else
		607	free (wrk);
		608
		609	UNLOCK (wrklock);
		610	}
		611
		612	static void maybe_start_thread ()
		613	{
		614	if (get_nthreads () >= wanted)
		615	return;
		616
		617	/* todo: maybe use idle here, but might be less exact */
		618	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		619	return;
		620
		621	start_thread ();
		622	}
		623
		624	static void req_send (aio_req req)
		625	{
		626	block_sig ();
		627
		628	++nreqs;
		629
		630	LOCK (reqlock);
		631	++nready;
		632	reqq_push (&req_queue, req);
		633	COND_SIGNAL (reqwait);
		634	UNLOCK (reqlock);
		635
		636	unblock_sig ();
		637
		638	maybe_start_thread ();
		639	}
		640
		641	static void end_thread (void)
		642	{
		643	aio_req req;
		644
		645	Newz (0, req, 1, aio_cb);
		646
		647	req->type = REQ_QUIT;
		648	req->pri = PRI_MAX + PRI_BIAS;
		649
		650	LOCK (reqlock);
		651	reqq_push (&req_queue, req);
		652	COND_SIGNAL (reqwait);
		653	UNLOCK (reqlock);
		654
		655	LOCK (wrklock);
		656	--started;
		657	UNLOCK (wrklock);
		658	}
		659
		660	static void set_max_idle (int nthreads)
		661	{
		662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		663	max_idle = nthreads <= 0 ? 1 : nthreads;
		664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		665	}
		666
		667	static void min_parallel (int nthreads)
		668	{
		669	if (wanted < nthreads)
		670	wanted = nthreads;
		671	}
		672
		673	static void max_parallel (int nthreads)
		674	{
		675	if (wanted > nthreads)
		676	wanted = nthreads;
		677
		678	while (started > wanted)
		679	end_thread ();
		680	}
		681
		682	static void poll_wait ()
		683	{
		684	fd_set rfd;
		685
		686	while (nreqs)
		687	{
		688	int size;
		689	if (WORDACCESS_UNSAFE) LOCK (reslock);
		690	size = res_queue.size;
		691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		692
		693	if (size)
		694	return;
		695
		696	maybe_start_thread ();
		697
		698	FD_ZERO(&rfd);
		699	FD_SET(respipe [0], &rfd);
		700
		701	select (respipe [0] + 1, &rfd, 0, 0, 0);
		702	}
		703	}
		704
		705	static int poll_cb ()
		706	{
		707	dSP;
		708	int count = 0;
		709	int maxreqs = max_poll_reqs;
		710	int do_croak = 0;
		711	struct timeval tv_start, tv_now;
		712	aio_req req;
		713
		714	if (max_poll_time)
		715	gettimeofday (&tv_start, 0);
		716
		717	block_sig ();
		718
		719	for (;;)
		720	{
		721	for (;;)
		722	{
		723	maybe_start_thread ();
		724
		725	LOCK (reslock);
		726	req = reqq_shift (&res_queue);
		727
		728	if (req)
191	{	729	{
192	PUTBACK;	730	--npending;
193	call_sv (req->callback, G_VOID | G_EVAL);
194	SPAGAIN;
195		731
196	if (SvTRUE (ERRSV))	732	if (!res_queue.size)
197	{	733	{
		734	/* read any signals sent by the worker threads */
		735	char buf [4];
		736	while (read (respipe [0], buf, 4) == 4)
		737	;
		738	}
		739	}
		740
		741	UNLOCK (reslock);
		742
		743	if (!req)
		744	break;
		745
		746	--nreqs;
		747
		748	if (req->type == REQ_GROUP && req->size)
		749	{
		750	req->int1 = 1; /* mark request as delayed */
		751	continue;
		752	}
		753	else
		754	{
		755	if (!req_invoke (req))
		756	{
198	free_req (req);	757	req_destroy (req);
		758	unblock_sig ();
199	croak (0);	759	croak (0);
200	}	760	}
		761
		762	count++;
201	}	763	}
202		764
203	LEAVE;	765	req_destroy (req);
204		766
205	errno = errorno;	767	if (maxreqs && !--maxreqs)
206	count++;	768	break;
		769
		770	if (max_poll_time)
		771	{
		772	gettimeofday (&tv_now, 0);
		773
		774	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		775	break;
		776	}
207	}	777	}
208		778
209	free_req (req);	779	if (nreqs <= max_outstanding)
		780	break;
		781
		782	poll_wait ();
		783
		784	++maxreqs;
210	}	785	}
211		786
		787	unblock_sig ();
212	return count;	788	return count;
213	}
214
215	static void *aio_proc(void *arg);
216
217	static void
218	start_thread (void)
219	{
220	sigset_t fullsigset, oldsigset;
221	pthread_t tid;
222	pthread_attr_t attr;
223
224	pthread_attr_init (&attr);
225	pthread_attr_setstacksize (&attr, STACKSIZE);
226	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227
228	sigfillset (&fullsigset);
229	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230
231	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
232	started++;
233
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}
236
237	static void
238	send_req (aio_req req)
239	{
240	while (started < wanted && nreqs >= started)
241	start_thread ();
242
243	nreqs++;
244
245	pthread_mutex_lock (&reqlock);
246
247	req->next = 0;
248
249	if (reqe)
250	{
251	reqe->next = req;
252	reqe = req;
253	}
254	else
255	reqe = reqs = req;
256
257	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);
259
260	if (nreqs > max_outstanding)
261	for (;;)
262	{
263	poll_cb ();
264
265	if (nreqs <= max_outstanding)
266	break;
267
268	poll_wait ();
269	}
270	}
271
272	static void
273	end_thread (void)
274	{
275	aio_req req;
276	Newz (0, req, 1, aio_cb);
277	req->type = REQ_QUIT;
278
279	send_req (req);
280	}
281
282	static void min_parallel (int nthreads)
283	{
284	if (wanted < nthreads)
285	wanted = nthreads;
286	}
287
288	static void max_parallel (int nthreads)
289	{
290	int cur = started;
291
292	if (wanted > nthreads)
293	wanted = nthreads;
294
295	while (cur > wanted)
296	{
297	end_thread ();
298	cur--;
299	}
300
301	while (started > wanted)
302	{
303	poll_wait ();
304	poll_cb ();
305	}
306	}	789	}
307		790
308	static void create_pipe ()	791	static void create_pipe ()
309	{	792	{
310	if (pipe (respipe))	793	if (pipe (respipe))
…		…
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	796	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");	797	croak ("cannot set result pipe to nonblocking mode");
315		798
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	799	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");	800	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}
331
332	static void atfork_child (void)
333	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();
359
360	atfork_parent ();
361	}	801	}
362		802
363	/*****************************************************************************/	803	/*****************************************************************************/
364	/* work around various missing functions */	804	/* work around various missing functions */
365		805
…		…
370	/*	810	/*
371	* make our pread/pwrite safe against themselves, but not against	811	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,	812	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.	813	* but that's your problem, not mine.
374	*/	814	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	815	static mutex_t preadwritelock = MUTEX_INIT;
376		816
377	static ssize_t	817	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{	818	{
380	ssize_t res;	819	ssize_t res;
381	off_t ooffset;	820	off_t ooffset;
382		821
383	pthread_mutex_lock (&iolock);	822	LOCK (preadwritelock);
384	ooffset = lseek (fd, 0, SEEK_CUR);	823	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);	824	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);	825	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);	826	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);	827	UNLOCK (preadwritelock);
389		828
390	return res;	829	return res;
391	}	830	}
392		831
393	static ssize_t
394	pwrite (int fd, void *buf, size_t count, off_t offset)	832	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
395	{	833	{
396	ssize_t res;	834	ssize_t res;
397	off_t ooffset;	835	off_t ooffset;
398		836
399	pthread_mutex_lock (&iolock);	837	LOCK (preadwritelock);
400	ooffset = lseek (fd, 0, SEEK_CUR);	838	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);	839	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);	840	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);	841	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);	842	UNLOCK (preadwritelock);
405		843
406	return res;	844	return res;
407	}	845	}
		846	#endif
		847
		848	#ifndef HAVE_FUTIMES
		849
		850	# define utimes(path,times) aio_utimes (path, times)
		851	# define futimes(fd,times) aio_futimes (fd, times)
		852
		853	int aio_utimes (const char *filename, const struct timeval times[2])
		854	{
		855	if (times)
		856	{
		857	struct utimbuf buf;
		858
		859	buf.actime = times[0].tv_sec;
		860	buf.modtime = times[1].tv_sec;
		861
		862	return utime (filename, &buf);
		863	}
		864	else
		865	return utime (filename, 0);
		866	}
		867
		868	int aio_futimes (int fd, const struct timeval tv[2])
		869	{
		870	errno = ENOSYS;
		871	return -1;
		872	}
		873
408	#endif	874	#endif
409		875
410	#if !HAVE_FDATASYNC	876	#if !HAVE_FDATASYNC
411	# define fdatasync fsync	877	# define fdatasync fsync
412	#endif	878	#endif
413		879
414	#if !HAVE_READAHEAD	880	#if !HAVE_READAHEAD
415	# define readahead aio_readahead	881	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
416		882
417	static char readahead_buf[4096];	883	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
418
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)
421	{	884	{
		885	dBUF;
		886
422	while (count > 0)	887	while (count > 0)
423	{	888	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	889	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
425		890
426	pread (fd, readahead_buf, len, offset);	891	pread (fd, aio_buf, len, offset);
427	offset += len;	892	offset += len;
428	count -= len;	893	count -= len;
429	}	894	}
430		895
431	errno = 0;	896	errno = 0;
432	}	897	}
		898
433	#endif	899	#endif
434		900
		901	#if !HAVE_READDIR_R
		902	# define readdir_r aio_readdir_r
		903
		904	static mutex_t readdirlock = MUTEX_INIT;
		905
		906	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		907	{
		908	struct dirent *e;
		909	int errorno;
		910
		911	LOCK (readdirlock);
		912
		913	e = readdir (dirp);
		914	errorno = errno;
		915
		916	if (e)
		917	{
		918	*res = ent;
		919	strcpy (ent->d_name, e->d_name);
		920	}
		921	else
		922	*res = 0;
		923
		924	UNLOCK (readdirlock);
		925
		926	errno = errorno;
		927	return e ? 0 : -1;
		928	}
		929	#endif
		930
435	/* sendfile always needs emulation */	931	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	932	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
438	{	933	{
439	ssize_t res;	934	ssize_t res;
440		935
441	if (!count)	936	if (!count)
442	return 0;	937	return 0;
443		938
		939	#if HAVE_SENDFILE
444	#if __linux	940	# if __linux
445	res = sendfile (ofd, ifd, &offset, count);	941	res = sendfile (ofd, ifd, &offset, count);
446		942
447	#elif __freebsd	943	# elif __freebsd
448	/*	944	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts	945	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.	946	* wasted on making it similar to other I/O functions.
451	*/	947	*/
452	{	948	{
453	off_t sbytes;	949	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	950	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455		951
456	if (!res && errno == EAGAIN)	952	if (res < 0 && sbytes)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */	953	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
458	res = sbytes;	954	res = sbytes;
459	}	955	}
460		956
461	#elif __hpux	957	# elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);	958	res = sendfile (ofd, ifd, offset, count, 0, 0);
463		959
		960	# elif __solaris
		961	{
		962	struct sendfilevec vec;
		963	size_t sbytes;
		964
		965	vec.sfv_fd = ifd;
		966	vec.sfv_flag = 0;
		967	vec.sfv_off = offset;
		968	vec.sfv_len = count;
		969
		970	res = sendfilev (ofd, &vec, 1, &sbytes);
		971
		972	if (res < 0 && sbytes)
		973	res = sbytes;
		974	}
		975
		976	# endif
464	#else	977	#else
465	res = -1;	978	res = -1;
466	errno = ENOSYS;	979	errno = ENOSYS;
467	#endif	980	#endif
468		981
		982	if (res < 0
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	983	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		984	#if __solaris
		985	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		986	#endif
		987	)
		988	)
470	{	989	{
471	/* emulate sendfile. this is a major pain in the ass */	990	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);	991	dBUF;
		992
473	res = 0;	993	res = 0;
474		994
475	for (;;)	995	while (count)
476	{	996	{
477	ssize_t cnt;	997	ssize_t cnt;
478		998
479	cnt = pread (ifd, buf, 4096, offset);	999	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
480		1000
481	if (cnt <= 0)	1001	if (cnt <= 0)
482	{	1002	{
483	if (cnt && !res) res = -1;	1003	if (cnt && !res) res = -1;
484	break;	1004	break;
485	}	1005	}
486		1006
487	cnt = write (ofd, buf, cnt);	1007	cnt = write (ofd, aio_buf, cnt);
488		1008
489	if (cnt <= 0)	1009	if (cnt <= 0)
490	{	1010	{
491	if (cnt && !res) res = -1;	1011	if (cnt && !res) res = -1;
492	break;	1012	break;
493	}	1013	}
494		1014
495	offset += cnt;	1015	offset += cnt;
496	res += cnt;	1016	res += cnt;
		1017	count -= cnt;
497	}	1018	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}	1019	}
505		1020
506	return res;	1021	return res;
		1022	}
		1023
		1024	/* read a full directory */
		1025	static void scandir_ (aio_req req, worker *self)
		1026	{
		1027	DIR *dirp;
		1028	union
		1029	{
		1030	struct dirent d;
		1031	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		1032	} *u;
		1033	struct dirent *entp;
		1034	char *name, *names;
		1035	int memlen = 4096;
		1036	int memofs = 0;
		1037	int res = 0;
		1038	int errorno;
		1039
		1040	LOCK (wrklock);
		1041	self->dirp = dirp = opendir (req->ptr1);
		1042	self->dbuf = u = malloc (sizeof (*u));
		1043	req->flags |= FLAG_PTR2_FREE;
		1044	req->ptr2 = names = malloc (memlen);
		1045	UNLOCK (wrklock);
		1046
		1047	if (dirp && u && names)
		1048	for (;;)
		1049	{
		1050	errno = 0;
		1051	readdir_r (dirp, &u->d, &entp);
		1052
		1053	if (!entp)
		1054	break;
		1055
		1056	name = entp->d_name;
		1057
		1058	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1059	{
		1060	int len = strlen (name) + 1;
		1061
		1062	res++;
		1063
		1064	while (memofs + len > memlen)
		1065	{
		1066	memlen *= 2;
		1067	LOCK (wrklock);
		1068	req->ptr2 = names = realloc (names, memlen);
		1069	UNLOCK (wrklock);
		1070
		1071	if (!names)
		1072	break;
		1073	}
		1074
		1075	memcpy (names + memofs, name, len);
		1076	memofs += len;
		1077	}
		1078	}
		1079
		1080	if (errno)
		1081	res = -1;
		1082
		1083	req->result = res;
507	}	1084	}
508		1085
509	/*****************************************************************************/	1086	/*****************************************************************************/
510		1087
511	static void *
512	aio_proc (void *thr_arg)	1088	static void *aio_proc (void *thr_arg)
513	{	1089	{
514	aio_req req;	1090	aio_req req;
515	int type;	1091	struct timespec ts;
		1092	worker *self = (worker *)thr_arg;
516		1093
517	do	1094	/* try to distribute timeouts somewhat evenly */
		1095	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1096	* (1000000000UL / 1024UL);
		1097
		1098	for (;;)
518	{	1099	{
519	pthread_mutex_lock (&reqlock);	1100	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1101
		1102	LOCK (reqlock);
520		1103
521	for (;;)	1104	for (;;)
522	{	1105	{
523	req = reqs;	1106	self->req = req = reqq_shift (&req_queue);
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530		1107
531	if (req)	1108	if (req)
532	break;	1109	break;
533		1110
534	pthread_cond_wait (&reqwait, &reqlock);	1111	++idle;
		1112
		1113	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1114	== ETIMEDOUT)
		1115	{
		1116	if (idle > max_idle)
		1117	{
		1118	--idle;
		1119	UNLOCK (reqlock);
		1120	LOCK (wrklock);
		1121	--started;
		1122	UNLOCK (wrklock);
		1123	goto quit;
		1124	}
		1125
		1126	/* we are allowed to idle, so do so without any timeout */
		1127	COND_WAIT (reqwait, reqlock);
		1128	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1129	}
		1130
		1131	--idle;
535	}	1132	}
536		1133
537	pthread_mutex_unlock (&reqlock);	1134	--nready;
		1135
		1136	UNLOCK (reqlock);
538		1137
539	errno = 0; /* strictly unnecessary */	1138	errno = 0; /* strictly unnecessary */
540		1139
541	type = req->type;	1140	if (!(req->flags & FLAG_CANCELLED))
542
543	switch (type)	1141	switch (req->type)
		1142	{
		1143	case REQ_READ: req->result = req->offs >= 0
		1144	? pread (req->int1, req->ptr1, req->size, req->offs)
		1145	: read (req->int1, req->ptr1, req->size); break;
		1146	case REQ_WRITE: req->result = req->offs >= 0
		1147	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1148	: write (req->int1, req->ptr1, req->size); break;
		1149
		1150	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1151	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1152
		1153	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1154	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1155	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1156
		1157	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1158	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1159	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1160	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1161
		1162	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1163	case REQ_CLOSE: req->result = close (req->int1); break;
		1164	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1165	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1166	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1167	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1168	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1169	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1170	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1171	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1172
		1173	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1174	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1175	case REQ_READDIR: scandir_ (req, self); break;
		1176
		1177	case REQ_BUSY:
		1178	{
		1179	struct timeval tv;
		1180
		1181	tv.tv_sec = req->nv1;
		1182	tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
		1183
		1184	req->result = select (0, 0, 0, 0, &tv);
		1185	}
		1186
		1187	case REQ_UTIME:
		1188	case REQ_FUTIME:
		1189	{
		1190	struct timeval tv[2];
		1191	struct timeval *times;
		1192
		1193	if (req->nv1 != -1. || req->nv2 != -1.)
		1194	{
		1195	tv[0].tv_sec = req->nv1;
		1196	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1197	tv[1].tv_sec = req->nv2;
		1198	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1199
		1200	times = tv;
		1201	}
		1202	else
		1203	times = 0;
		1204
		1205
		1206	req->result = req->type == REQ_FUTIME
		1207	? futimes (req->int1, times)
		1208	: utimes (req->ptr1, times);
		1209	}
		1210
		1211	case REQ_GROUP:
		1212	case REQ_NOP:
		1213	break;
		1214
		1215	case REQ_QUIT:
		1216	goto quit;
		1217
		1218	default:
		1219	req->result = -1;
		1220	break;
		1221	}
		1222
		1223	req->errorno = errno;
		1224
		1225	LOCK (reslock);
		1226
		1227	++npending;
		1228
		1229	if (!reqq_push (&res_queue, req))
544	{	1230	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
546	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
549	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
550
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;
563
564	case REQ_QUIT:
565	break;
566
567	default:
568	req->result = ENOSYS;
569	break;
570	}
571
572	req->errorno = errno;
573
574	pthread_mutex_lock (&reslock);
575
576	req->next = 0;
577
578	if (rese)
579	{
580	rese->next = req;
581	rese = req;
582	}
583	else
584	{
585	rese = ress = req;
586
587	/* write a dummy byte to the pipe so fh becomes ready */	1231	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);	1232	write (respipe [1], &respipe, 1);
		1233
		1234	/* optionally signal the main thread asynchronously */
		1235	if (main_sig)
		1236	pthread_kill (main_tid, main_sig);
589	}	1237	}
590		1238
591	pthread_mutex_unlock (&reslock);	1239	self->req = 0;
		1240	worker_clear (self);
		1241
		1242	UNLOCK (reslock);
592	}	1243	}
593	while (type != REQ_QUIT);	1244
		1245	quit:
		1246	LOCK (wrklock);
		1247	worker_free (self);
		1248	UNLOCK (wrklock);
594		1249
595	return 0;	1250	return 0;
		1251	}
		1252
		1253	/*****************************************************************************/
		1254
		1255	static void atfork_prepare (void)
		1256	{
		1257	LOCK (wrklock);
		1258	LOCK (reqlock);
		1259	LOCK (reslock);
		1260	#if !HAVE_PREADWRITE
		1261	LOCK (preadwritelock);
		1262	#endif
		1263	#if !HAVE_READDIR_R
		1264	LOCK (readdirlock);
		1265	#endif
		1266	}
		1267
		1268	static void atfork_parent (void)
		1269	{
		1270	#if !HAVE_READDIR_R
		1271	UNLOCK (readdirlock);
		1272	#endif
		1273	#if !HAVE_PREADWRITE
		1274	UNLOCK (preadwritelock);
		1275	#endif
		1276	UNLOCK (reslock);
		1277	UNLOCK (reqlock);
		1278	UNLOCK (wrklock);
		1279	}
		1280
		1281	static void atfork_child (void)
		1282	{
		1283	aio_req prv;
		1284
		1285	while (prv = reqq_shift (&req_queue))
		1286	req_destroy (prv);
		1287
		1288	while (prv = reqq_shift (&res_queue))
		1289	req_destroy (prv);
		1290
		1291	while (wrk_first.next != &wrk_first)
		1292	{
		1293	worker *wrk = wrk_first.next;
		1294
		1295	if (wrk->req)
		1296	req_destroy (wrk->req);
		1297
		1298	worker_clear (wrk);
		1299	worker_free (wrk);
		1300	}
		1301
		1302	started = 0;
		1303	idle = 0;
		1304	nreqs = 0;
		1305	nready = 0;
		1306	npending = 0;
		1307
		1308	close (respipe [0]);
		1309	close (respipe [1]);
		1310	create_pipe ();
		1311
		1312	atfork_parent ();
596	}	1313	}
597		1314
598	#define dREQ \	1315	#define dREQ \
599	aio_req req; \	1316	aio_req req; \
		1317	int req_pri = next_pri; \
		1318	next_pri = DEFAULT_PRI + PRI_BIAS; \
600	\	1319	\
601	if (SvOK (callback) && !SvROK (callback)) \	1320	if (SvOK (callback) && !SvROK (callback)) \
602	croak ("clalback must be undef or of reference type"); \	1321	croak ("callback must be undef or of reference type"); \
603	\	1322	\
604	Newz (0, req, 1, aio_cb); \	1323	Newz (0, req, 1, aio_cb); \
605	if (!req) \	1324	if (!req) \
606	croak ("out of memory during aio_req allocation"); \	1325	croak ("out of memory during aio_req allocation"); \
607	\	1326	\
608	req->callback = newSVsv (callback);	1327	req->callback = newSVsv (callback); \
		1328	req->pri = req_pri
		1329
		1330	#define REQ_SEND \
		1331	req_send (req); \
		1332	\
		1333	if (GIMME_V != G_VOID) \
		1334	XPUSHs (req_sv (req, AIO_REQ_KLASS));
609		1335
610	MODULE = IO::AIO PACKAGE = IO::AIO	1336	MODULE = IO::AIO PACKAGE = IO::AIO
611		1337
612	PROTOTYPES: ENABLE	1338	PROTOTYPES: ENABLE
613		1339
614	BOOT:	1340	BOOT:
615	{	1341	{
		1342	HV *stash = gv_stashpv ("IO::AIO", 1);
		1343
		1344	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1345	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1346	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1347	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1348	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1349	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1350	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1351
616	create_pipe ();	1352	create_pipe ();
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1353	ATFORK (atfork_prepare, atfork_parent, atfork_child);
618	}	1354	}
619		1355
620	void	1356	void
621	min_parallel(nthreads)	1357	max_poll_reqs (int nreqs)
622	int nthreads
623	PROTOTYPE: $	1358	PROTOTYPE: $
		1359	CODE:
		1360	max_poll_reqs = nreqs;
624		1361
625	void	1362	void
626	max_parallel(nthreads)	1363	max_poll_time (double nseconds)
627	int nthreads
628	PROTOTYPE: $	1364	PROTOTYPE: $
		1365	CODE:
		1366	max_poll_time = nseconds * AIO_TICKS;
		1367
		1368	void
		1369	min_parallel (int nthreads)
		1370	PROTOTYPE: $
		1371
		1372	void
		1373	max_parallel (int nthreads)
		1374	PROTOTYPE: $
		1375
		1376	void
		1377	max_idle (int nthreads)
		1378	PROTOTYPE: $
		1379	CODE:
		1380	set_max_idle (nthreads);
629		1381
630	int	1382	int
631	max_outstanding(nreqs)	1383	max_outstanding (int maxreqs)
632	int nreqs	1384	PROTOTYPE: $
633	PROTOTYPE: $
634	CODE:	1385	CODE:
635	RETVAL = max_outstanding;	1386	RETVAL = max_outstanding;
636	max_outstanding = nreqs;	1387	max_outstanding = maxreqs;
		1388	OUTPUT:
		1389	RETVAL
637		1390
638	void	1391	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1392	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
640	SV * pathname
641	int flags
642	int mode
643	SV * callback
644	PROTOTYPE: $$$;$	1393	PROTOTYPE: $$$;$
645	CODE:	1394	PPCODE:
646	{	1395	{
647	dREQ;	1396	dREQ;
648		1397
649	req->type = REQ_OPEN;	1398	req->type = REQ_OPEN;
650	req->data = newSVsv (pathname);	1399	req->sv1 = newSVsv (pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);	1400	req->ptr1 = SvPVbyte_nolen (req->sv1);
652	req->fd = flags;	1401	req->int1 = flags;
653	req->mode = mode;	1402	req->mode = mode;
654		1403
655	send_req (req);	1404	REQ_SEND;
656	}	1405	}
657		1406
658	void	1407	void
659	aio_close(fh,callback=&PL_sv_undef)	1408	aio_close (SV *fh, SV *callback=&PL_sv_undef)
660	SV * fh
661	SV * callback
662	PROTOTYPE: $;$	1409	PROTOTYPE: $;$
663	ALIAS:	1410	ALIAS:
664	aio_close = REQ_CLOSE	1411	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	1412	aio_fsync = REQ_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	1413	aio_fdatasync = REQ_FDATASYNC
667	CODE:	1414	PPCODE:
668	{	1415	{
669	dREQ;	1416	dREQ;
670		1417
671	req->type = ix;	1418	req->type = ix;
672	req->fh = newSVsv (fh);	1419	req->sv1 = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1420	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
674		1421
675	send_req (req);	1422	REQ_SEND (req);
676	}	1423	}
677		1424
678	void	1425	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1426	aio_read (SV *fh, SV *offset, UV length, SV8 *data, UV dataoffset, SV *callback=&PL_sv_undef)
680	SV * fh
681	UV offset
682	UV length
683	SV * data
684	UV dataoffset
685	SV * callback
686	ALIAS:	1427	ALIAS:
687	aio_read = REQ_READ	1428	aio_read = REQ_READ
688	aio_write = REQ_WRITE	1429	aio_write = REQ_WRITE
689	PROTOTYPE: $$$$$;$	1430	PROTOTYPE: $$$$$;$
690	CODE:	1431	PPCODE:
691	{	1432	{
692	aio_req req;
693	STRLEN svlen;	1433	STRLEN svlen;
694	char *svptr = SvPVbyte (data, svlen);	1434	char *svptr = SvPVbyte (data, svlen);
695		1435
696	SvUPGRADE (data, SVt_PV);	1436	SvUPGRADE (data, SVt_PV);
697	SvPOK_on (data);	1437	SvPOK_on (data);
…		…
709	length = svlen - dataoffset;	1449	length = svlen - dataoffset;
710	}	1450	}
711	else	1451	else
712	{	1452	{
713	/* read: grow scalar as necessary */	1453	/* read: grow scalar as necessary */
714	svptr = SvGROW (data, length + dataoffset);	1454	svptr = SvGROW (data, length + dataoffset + 1);
715	}	1455	}
716		1456
717	if (length < 0)	1457	if (length < 0)
718	croak ("length must not be negative");	1458	croak ("length must not be negative");
719		1459
720	{	1460	{
721	dREQ;	1461	dREQ;
722		1462
723	req->type = ix;	1463	req->type = ix;
724	req->fh = newSVsv (fh);	1464	req->sv1 = newSVsv (fh);
725	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1465	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
726	: IoOFP (sv_2io (fh)));	1466	: IoOFP (sv_2io (fh)));
727	req->offset = offset;	1467	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
728	req->length = length;	1468	req->size = length;
729	req->data = SvREFCNT_inc (data);	1469	req->sv2 = SvREFCNT_inc (data);
730	req->dataptr = (char *)svptr + dataoffset;	1470	req->ptr1 = (char *)svptr + dataoffset;
		1471	req->stroffset = dataoffset;
731		1472
732	if (!SvREADONLY (data))	1473	if (!SvREADONLY (data))
733	{	1474	{
734	SvREADONLY_on (data);	1475	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1476	req->flags |= FLAG_SV2_RO_OFF;
736	}	1477	}
737		1478
738	send_req (req);	1479	REQ_SEND;
739	}	1480	}
740	}	1481	}
741		1482
742	void	1483	void
		1484	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1485	PROTOTYPE: $$;$
		1486	PPCODE:
		1487	{
		1488	SV *data;
		1489	dREQ;
		1490
		1491	data = newSV (NAME_MAX);
		1492	SvPOK_on (data);
		1493
		1494	req->type = REQ_READLINK;
		1495	req->sv1 = newSVsv (path);
		1496	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1497	req->sv2 = data;
		1498	req->ptr1 = SvPVbyte_nolen (data);
		1499
		1500	REQ_SEND;
		1501	}
		1502
		1503	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1504	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
744	SV * out_fh
745	SV * in_fh
746	UV in_offset
747	UV length
748	SV * callback
749	PROTOTYPE: $$$$;$	1505	PROTOTYPE: $$$$;$
750	CODE:	1506	PPCODE:
751	{	1507	{
752	dREQ;	1508	dREQ;
753		1509
754	req->type = REQ_SENDFILE;	1510	req->type = REQ_SENDFILE;
755	req->fh = newSVsv (out_fh);	1511	req->sv1 = newSVsv (out_fh);
756	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1512	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
757	req->fh2 = newSVsv (in_fh);	1513	req->sv2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1514	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759	req->offset = in_offset;	1515	req->offs = SvVAL64 (in_offset);
760	req->length = length;	1516	req->size = length;
761		1517
762	send_req (req);	1518	REQ_SEND;
763	}	1519	}
764		1520
765	void	1521	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1522	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
767	SV * fh
768	UV offset
769	IV length
770	SV * callback
771	PROTOTYPE: $$$;$	1523	PROTOTYPE: $$$;$
772	CODE:	1524	PPCODE:
773	{	1525	{
774	dREQ;	1526	dREQ;
775		1527
776	req->type = REQ_READAHEAD;	1528	req->type = REQ_READAHEAD;
777	req->fh = newSVsv (fh);	1529	req->sv1 = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1530	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
779	req->offset = offset;	1531	req->offs = SvVAL64 (offset);
780	req->length = length;	1532	req->size = length;
781		1533
782	send_req (req);	1534	REQ_SEND;
783	}	1535	}
784		1536
785	void	1537	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	1538	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
787	SV * fh_or_path
788	SV * callback
789	ALIAS:	1539	ALIAS:
790	aio_stat = REQ_STAT	1540	aio_stat = REQ_STAT
791	aio_lstat = REQ_LSTAT	1541	aio_lstat = REQ_LSTAT
792	CODE:	1542	PPCODE:
793	{	1543	{
794	dREQ;	1544	dREQ;
795		1545
796	New (0, req->statdata, 1, Stat_t);	1546	req->ptr2 = malloc (sizeof (Stat_t));
797	if (!req->statdata)	1547	if (!req->ptr2)
798	{	1548	{
799	free_req (req);	1549	req_destroy (req);
800	croak ("out of memory during aio_req->statdata allocation");	1550	croak ("out of memory during aio_stat statdata allocation");
801	}	1551	}
		1552
		1553	req->flags |= FLAG_PTR2_FREE;
		1554	req->sv1 = newSVsv (fh_or_path);
802		1555
803	if (SvPOK (fh_or_path))	1556	if (SvPOK (fh_or_path))
804	{	1557	{
805	req->type = ix;	1558	req->type = ix;
806	req->data = newSVsv (fh_or_path);
807	req->dataptr = SvPVbyte_nolen (req->data);	1559	req->ptr1 = SvPVbyte_nolen (req->sv1);
808	}	1560	}
809	else	1561	else
810	{	1562	{
811	req->type = REQ_FSTAT;	1563	req->type = REQ_FSTAT;
812	req->fh = newSVsv (fh_or_path);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
814	}	1565	}
815		1566
816	send_req (req);	1567	REQ_SEND;
817	}	1568	}
818		1569
819	void	1570	void
		1571	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1572	PPCODE:
		1573	{
		1574	dREQ;
		1575
		1576	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1577	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1578	req->sv1 = newSVsv (fh_or_path);
		1579
		1580	if (SvPOK (fh_or_path))
		1581	{
		1582	req->type = REQ_UTIME;
		1583	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1584	}
		1585	else
		1586	{
		1587	req->type = REQ_FUTIME;
		1588	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1589	}
		1590
		1591	REQ_SEND;
		1592	}
		1593
		1594	void
		1595	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1596	PPCODE:
		1597	{
		1598	dREQ;
		1599
		1600	req->mode = mode;
		1601	req->sv1 = newSVsv (fh_or_path);
		1602
		1603	if (SvPOK (fh_or_path))
		1604	{
		1605	req->type = REQ_CHMOD;
		1606	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1607	}
		1608	else
		1609	{
		1610	req->type = REQ_FCHMOD;
		1611	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1612	}
		1613
		1614	REQ_SEND;
		1615	}
		1616
		1617	void
		1618	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1619	PPCODE:
		1620	{
		1621	dREQ;
		1622
		1623	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1624	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1625	req->sv1 = newSVsv (fh_or_path);
		1626
		1627	if (SvPOK (fh_or_path))
		1628	{
		1629	req->type = REQ_CHOWN;
		1630	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1631	}
		1632	else
		1633	{
		1634	req->type = REQ_FCHOWN;
		1635	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1636	}
		1637
		1638	REQ_SEND;
		1639	}
		1640
		1641	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1642	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
821	SV * pathname
822	SV * callback
823	ALIAS:	1643	ALIAS:
824	aio_unlink = REQ_UNLINK	1644	aio_unlink = REQ_UNLINK
825	aio_rmdir = REQ_RMDIR	1645	aio_rmdir = REQ_RMDIR
		1646	aio_readdir = REQ_READDIR
826	CODE:	1647	PPCODE:
827	{	1648	{
828	dREQ;	1649	dREQ;
829		1650
830	req->type = ix;	1651	req->type = ix;
831	req->data = newSVsv (pathname);	1652	req->sv1 = newSVsv (pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);	1653	req->ptr1 = SvPVbyte_nolen (req->sv1);
833
834	send_req (req);
835	}
836		1654
		1655	REQ_SEND;
		1656	}
		1657
837	void	1658	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1659	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
839	SV * oldpath
840	SV * newpath
841	SV * callback
842	CODE:	1660	PPCODE:
843	{	1661	{
844	dREQ;	1662	dREQ;
845		1663
846	req->type = REQ_SYMLINK;	1664	req->type = REQ_MKDIR;
847	req->fh = newSVsv (oldpath);	1665	req->sv1 = newSVsv (pathname);
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1666	req->ptr1 = SvPVbyte_nolen (req->sv1);
849	req->data = newSVsv (newpath);	1667	req->mode = mode;
850	req->dataptr = SvPVbyte_nolen (req->data);	1668
		1669	REQ_SEND;
		1670	}
		1671
		1672	void
		1673	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1674	ALIAS:
		1675	aio_link = REQ_LINK
		1676	aio_symlink = REQ_SYMLINK
		1677	aio_rename = REQ_RENAME
		1678	PPCODE:
		1679	{
		1680	dREQ;
851		1681
852	send_req (req);	1682	req->type = ix;
		1683	req->sv2 = newSVsv (oldpath);
		1684	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1685	req->sv1 = newSVsv (newpath);
		1686	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1687
		1688	REQ_SEND;
853	}	1689	}
854		1690
855	void	1691	void
		1692	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1693	PPCODE:
		1694	{
		1695	dREQ;
		1696
		1697	req->type = REQ_MKNOD;
		1698	req->sv1 = newSVsv (pathname);
		1699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1700	req->mode = (mode_t)mode;
		1701	req->offs = dev;
		1702
		1703	REQ_SEND;
		1704	}
		1705
		1706	void
		1707	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1708	PPCODE:
		1709	{
		1710	dREQ;
		1711
		1712	req->type = REQ_BUSY;
		1713	req->nv1 = delay < 0. ? 0. : delay;
		1714
		1715	REQ_SEND;
		1716	}
		1717
		1718	void
		1719	aio_group (SV *callback=&PL_sv_undef)
		1720	PROTOTYPE: ;$
		1721	PPCODE:
		1722	{
		1723	dREQ;
		1724
		1725	req->type = REQ_GROUP;
		1726
		1727	req_send (req);
		1728	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1729	}
		1730
		1731	void
		1732	aio_nop (SV *callback=&PL_sv_undef)
		1733	PPCODE:
		1734	{
		1735	dREQ;
		1736
		1737	req->type = REQ_NOP;
		1738
		1739	REQ_SEND;
		1740	}
		1741
		1742	int
		1743	aioreq_pri (int pri = 0)
		1744	PROTOTYPE: ;$
		1745	CODE:
		1746	RETVAL = next_pri - PRI_BIAS;
		1747	if (items > 0)
		1748	{
		1749	if (pri < PRI_MIN) pri = PRI_MIN;
		1750	if (pri > PRI_MAX) pri = PRI_MAX;
		1751	next_pri = pri + PRI_BIAS;
		1752	}
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	void
		1757	aioreq_nice (int nice = 0)
		1758	CODE:
		1759	nice = next_pri - nice;
		1760	if (nice < PRI_MIN) nice = PRI_MIN;
		1761	if (nice > PRI_MAX) nice = PRI_MAX;
		1762	next_pri = nice + PRI_BIAS;
		1763
		1764	void
856	flush()	1765	flush ()
857	PROTOTYPE:	1766	PROTOTYPE:
858	CODE:	1767	CODE:
859	while (nreqs)	1768	while (nreqs)
860	{	1769	{
861	poll_wait ();	1770	poll_wait ();
862	poll_cb ();	1771	poll_cb ();
863	}	1772	}
864		1773
865	void	1774	int
866	poll()	1775	poll()
867	PROTOTYPE:	1776	PROTOTYPE:
868	CODE:	1777	CODE:
869	if (nreqs)
870	{
871	poll_wait ();	1778	poll_wait ();
872	poll_cb ();	1779	RETVAL = poll_cb ();
873	}	1780	OUTPUT:
		1781	RETVAL
874		1782
875	int	1783	int
876	poll_fileno()	1784	poll_fileno()
877	PROTOTYPE:	1785	PROTOTYPE:
878	CODE:	1786	CODE:
…		…
890		1798
891	void	1799	void
892	poll_wait()	1800	poll_wait()
893	PROTOTYPE:	1801	PROTOTYPE:
894	CODE:	1802	CODE:
895	if (nreqs)
896	poll_wait ();	1803	poll_wait ();
		1804
		1805	void
		1806	setsig (int signum = SIGIO)
		1807	PROTOTYPE: ;$
		1808	CODE:
		1809	{
		1810	if (block_sig_level)
		1811	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1812
		1813	LOCK (reslock);
		1814	main_tid = pthread_self ();
		1815	main_sig = signum;
		1816	UNLOCK (reslock);
		1817
		1818	if (main_sig && npending)
		1819	pthread_kill (main_tid, main_sig);
		1820	}
		1821
		1822	void
		1823	aio_block (SV *cb)
		1824	PROTOTYPE: &
		1825	PPCODE:
		1826	{
		1827	int count;
		1828
		1829	block_sig ();
		1830	PUSHMARK (SP);
		1831	PUTBACK;
		1832	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1833	SPAGAIN;
		1834	unblock_sig ();
		1835
		1836	if (SvTRUE (ERRSV))
		1837	croak (0);
		1838
		1839	XSRETURN (count);
		1840	}
897		1841
898	int	1842	int
899	nreqs()	1843	nreqs()
900	PROTOTYPE:	1844	PROTOTYPE:
901	CODE:	1845	CODE:
902	RETVAL = nreqs;	1846	RETVAL = nreqs;
903	OUTPUT:	1847	OUTPUT:
904	RETVAL	1848	RETVAL
905		1849
		1850	int
		1851	nready()
		1852	PROTOTYPE:
		1853	CODE:
		1854	RETVAL = get_nready ();
		1855	OUTPUT:
		1856	RETVAL
		1857
		1858	int
		1859	npending()
		1860	PROTOTYPE:
		1861	CODE:
		1862	RETVAL = get_npending ();
		1863	OUTPUT:
		1864	RETVAL
		1865
		1866	int
		1867	nthreads()
		1868	PROTOTYPE:
		1869	CODE:
		1870	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1871	RETVAL = started;
		1872	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1873	OUTPUT:
		1874	RETVAL
		1875
		1876	PROTOTYPES: DISABLE
		1877
		1878	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1879
		1880	void
		1881	cancel (aio_req_ornot req)
		1882	CODE:
		1883	req_cancel (req);
		1884
		1885	void
		1886	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1887	CODE:
		1888	SvREFCNT_dec (req->callback);
		1889	req->callback = newSVsv (callback);
		1890
		1891	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1892
		1893	void
		1894	add (aio_req grp, ...)
		1895	PPCODE:
		1896	{
		1897	int i;
		1898	aio_req req;
		1899
		1900	if (main_sig && !block_sig_level)
		1901	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1902
		1903	if (grp->int1 == 2)
		1904	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1905
		1906	for (i = 1; i < items; ++i )
		1907	{
		1908	if (GIMME_V != G_VOID)
		1909	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1910
		1911	req = SvAIO_REQ (ST (i));
		1912
		1913	if (req)
		1914	{
		1915	++grp->size;
		1916	req->grp = grp;
		1917
		1918	req->grp_prev = 0;
		1919	req->grp_next = grp->grp_first;
		1920
		1921	if (grp->grp_first)
		1922	grp->grp_first->grp_prev = req;
		1923
		1924	grp->grp_first = req;
		1925	}
		1926	}
		1927	}
		1928
		1929	void
		1930	cancel_subs (aio_req_ornot req)
		1931	CODE:
		1932	req_cancel_subs (req);
		1933
		1934	void
		1935	result (aio_req grp, ...)
		1936	CODE:
		1937	{
		1938	int i;
		1939	AV *av;
		1940
		1941	grp->errorno = errno;
		1942
		1943	av = newAV ();
		1944
		1945	for (i = 1; i < items; ++i )
		1946	av_push (av, newSVsv (ST (i)));
		1947
		1948	SvREFCNT_dec (grp->sv1);
		1949	grp->sv1 = (SV *)av;
		1950	}
		1951
		1952	void
		1953	errno (aio_req grp, int errorno = errno)
		1954	CODE:
		1955	grp->errorno = errorno;
		1956
		1957	void
		1958	limit (aio_req grp, int limit)
		1959	CODE:
		1960	grp->int2 = limit;
		1961	aio_grp_feed (grp);
		1962
		1963	void
		1964	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1965	CODE:
		1966	{
		1967	SvREFCNT_dec (grp->sv2);
		1968	grp->sv2 = newSVsv (callback);
		1969
		1970	if (grp->int2 <= 0)
		1971	grp->int2 = 2;
		1972
		1973	aio_grp_feed (grp);
		1974	}
		1975

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines