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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.99 by root, Fri Jun 1 05:51:21 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
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
13	#include <sys/types.h>	16	#include <sys/types.h>
14	#include <sys/stat.h>	17	#include <sys/stat.h>
15	#include <limits.h>	18	#include <limits.h>
16	#include <unistd.h>	19	#include <unistd.h>
17	#include <fcntl.h>	20	#include <fcntl.h>
18	#include <signal.h>	21	#include <signal.h>
19	#include <sched.h>	22	#include <sched.h>
		23	#include <utime.h>
20		24
21	#if HAVE_SENDFILE	25	#if HAVE_SENDFILE
22	# if __linux	26	# if __linux
23	# include <sys/sendfile.h>	27	# include <sys/sendfile.h>
24	# elif __freebsd	28	# elif __freebsd
…		…
31	# else	35	# else
32	# error sendfile support requested but not available	36	# error sendfile support requested but not available
33	# endif	37	# endif
34	#endif	38	#endif
35		39
36	#if __ia64	40	/* number of seconds after which idle threads exit */
37	# define STACKSIZE 65536	41	#define IDLE_TIMEOUT 10
38	#else	42
39	# define STACKSIZE 8192	43	/* used for struct dirent, AIX doesn't provide it */
		44	#ifndef NAME_MAX
		45	# define NAME_MAX 4096
40	#endif	46	#endif
		47
		48	/* buffer size for various temporary buffers */
		49	#define AIO_BUFSIZE 65536
		50
		51	#define dBUF \
		52	char *aio_buf; \
		53	LOCK (wrklock); \
		54	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		55	UNLOCK (wrklock); \
		56	if (!aio_buf) \
		57	return -1;
		58
		59	typedef SV SV8; /* byte-sv, used for argument-checking */
41		60
42	enum {	61	enum {
43	REQ_QUIT,	62	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	63	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	64	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,	65	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	66	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		67	REQ_UTIME, REQ_FUTIME, /* must be consecutive */
		68	REQ_CHMOD, REQ_FCHMOD, /* must be consecutive */
		69	REQ_CHOWN, REQ_FCHOWN, /* must be consecutive */
48	REQ_FSYNC, REQ_FDATASYNC,	70	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	71	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
50	REQ_READDIR,	72	REQ_MKNOD, REQ_READDIR,
51	REQ_SYMLINK,	73	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		74	REQ_GROUP, REQ_NOP,
		75	REQ_BUSY,
52	};	76	};
53		77
		78	#define AIO_REQ_KLASS "IO::AIO::REQ"
		79	#define AIO_GRP_KLASS "IO::AIO::GRP"
		80
54	typedef struct aio_cb {	81	typedef struct aio_cb
		82	{
55	struct aio_cb *volatile next;	83	struct aio_cb *volatile next;
56		84
		85	SV *callback;
		86	SV *sv1, *sv2;
		87	void *ptr1, *ptr2;
		88	off_t offs;
		89	size_t size;
		90	ssize_t result;
		91	double nv1, nv2;
		92
		93	STRLEN stroffset;
57	int type;	94	int type;
58		95	int int1, int2, int3;
59	/* should receive a cleanup, with unions */	96	int errorno;
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */	97	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		98
71	Stat_t *statdata;	99	unsigned char flags;
		100	unsigned char pri;
		101
		102	SV *self; /* the perl counterpart of this request, if any */
		103	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72	} aio_cb;	104	} aio_cb;
73		105
		106	enum {
		107	FLAG_CANCELLED = 0x01, /* request was cancelled */
		108	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		109	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		110	};
		111
74	typedef aio_cb *aio_req;	112	typedef aio_cb *aio_req;
		113	typedef aio_cb *aio_req_ornot;
75		114
		115	enum {
		116	PRI_MIN = -4,
		117	PRI_MAX = 4,
		118
		119	DEFAULT_PRI = 0,
		120	PRI_BIAS = -PRI_MIN,
		121	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		122	};
		123
		124	#define AIO_TICKS ((1000000 + 1023) >> 10)
		125
		126	static unsigned int max_poll_time = 0;
		127	static unsigned int max_poll_reqs = 0;
		128
		129	/* calculcate time difference in ~1/AIO_TICKS of a second */
		130	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		131	{
		132	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		133	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		134	}
		135
		136	static thread_t main_tid;
		137	static int main_sig;
		138	static int block_sig_level;
		139
		140	void block_sig ()
		141	{
		142	sigset_t ss;
		143
		144	if (block_sig_level++)
		145	return;
		146
		147	if (!main_sig)
		148	return;
		149
		150	sigemptyset (&ss);
		151	sigaddset (&ss, main_sig);
		152	pthread_sigmask (SIG_BLOCK, &ss, 0);
		153	}
		154
		155	void unblock_sig ()
		156	{
		157	sigset_t ss;
		158
		159	if (--block_sig_level)
		160	return;
		161
		162	if (!main_sig)
		163	return;
		164
		165	sigemptyset (&ss);
		166	sigaddset (&ss, main_sig);
		167	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		168	}
		169
		170	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		171
76	static int started, wanted;	172	static unsigned int started, idle, wanted;
77	static volatile int nreqs;	173
78	static int max_outstanding = 1<<30;	174	/* worker threads management */
		175	static mutex_t wrklock = MUTEX_INIT;
		176
		177	typedef struct worker {
		178	/* locked by wrklock */
		179	struct worker *prev, *next;
		180
		181	thread_t tid;
		182
		183	/* locked by reslock, reqlock or wrklock */
		184	aio_req req; /* currently processed request */
		185	void *dbuf;
		186	DIR *dirp;
		187	} worker;
		188
		189	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		190
		191	static void worker_clear (worker *wrk)
		192	{
		193	if (wrk->dirp)
		194	{
		195	closedir (wrk->dirp);
		196	wrk->dirp = 0;
		197	}
		198
		199	if (wrk->dbuf)
		200	{
		201	free (wrk->dbuf);
		202	wrk->dbuf = 0;
		203	}
		204	}
		205
		206	static void worker_free (worker *wrk)
		207	{
		208	wrk->next->prev = wrk->prev;
		209	wrk->prev->next = wrk->next;
		210
		211	free (wrk);
		212	}
		213
		214	static volatile unsigned int nreqs, nready, npending;
		215	static volatile unsigned int max_idle = 4;
		216	static volatile unsigned int max_outstanding = 0xffffffff;
79	static int respipe [2];	217	static int respipe [2];
80		218
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	219	static mutex_t reslock = MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	220	static mutex_t reqlock = MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	221	static cond_t reqwait = COND_INIT;
84		222
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	223	#if WORDACCESS_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		224
		225	static unsigned int get_nready ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reqlock);
		230	retval = nready;
		231	UNLOCK (reqlock);
		232
		233	return retval;
		234	}
		235
		236	static unsigned int get_npending ()
		237	{
		238	unsigned int retval;
		239
		240	LOCK (reslock);
		241	retval = npending;
		242	UNLOCK (reslock);
		243
		244	return retval;
		245	}
		246
		247	static unsigned int get_nthreads ()
		248	{
		249	unsigned int retval;
		250
		251	LOCK (wrklock);
		252	retval = started;
		253	UNLOCK (wrklock);
		254
		255	return retval;
		256	}
		257
		258	#else
		259
		260	# define get_nready() nready
		261	# define get_npending() npending
		262	# define get_nthreads() started
		263
		264	#endif
		265
		266	/*
		267	* a somewhat faster data structure might be nice, but
		268	* with 8 priorities this actually needs <20 insns
		269	* per shift, the most expensive operation.
		270	*/
		271	typedef struct {
		272	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		273	int size;
		274	} reqq;
		275
		276	static reqq req_queue;
		277	static reqq res_queue;
		278
		279	int reqq_push (reqq *q, aio_req req)
		280	{
		281	int pri = req->pri;
		282	req->next = 0;
		283
		284	if (q->qe[pri])
		285	{
		286	q->qe[pri]->next = req;
		287	q->qe[pri] = req;
		288	}
		289	else
		290	q->qe[pri] = q->qs[pri] = req;
		291
		292	return q->size++;
		293	}
		294
		295	aio_req reqq_shift (reqq *q)
		296	{
		297	int pri;
		298
		299	if (!q->size)
		300	return 0;
		301
		302	--q->size;
		303
		304	for (pri = NUM_PRI; pri--; )
		305	{
		306	aio_req req = q->qs[pri];
		307
		308	if (req)
		309	{
		310	if (!(q->qs[pri] = req->next))
		311	q->qe[pri] = 0;
		312
		313	return req;
		314	}
		315	}
		316
		317	abort ();
		318	}
		319
		320	static int poll_cb ();
		321	static int req_invoke (aio_req req);
		322	static void req_free (aio_req req);
		323	static void req_cancel (aio_req req);
		324
		325	/* must be called at most once */
		326	static SV *req_sv (aio_req req, const char *klass)
		327	{
		328	if (!req->self)
		329	{
		330	req->self = (SV *)newHV ();
		331	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		332	}
		333
		334	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		335	}
		336
		337	static aio_req SvAIO_REQ (SV *sv)
		338	{
		339	MAGIC *mg;
		340
		341	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		342	croak ("object of class " AIO_REQ_KLASS " expected");
		343
		344	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		345
		346	return mg ? (aio_req)mg->mg_ptr : 0;
		347	}
		348
		349	static void aio_grp_feed (aio_req grp)
		350	{
		351	block_sig ();
		352
		353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		354	{
		355	int old_len = grp->size;
		356
		357	if (grp->sv2 && SvOK (grp->sv2))
		358	{
		359	dSP;
		360
		361	ENTER;
		362	SAVETMPS;
		363	PUSHMARK (SP);
		364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		365	PUTBACK;
		366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		367	SPAGAIN;
		368	FREETMPS;
		369	LEAVE;
		370	}
		371
		372	/* stop if no progress has been made */
		373	if (old_len == grp->size)
		374	{
		375	SvREFCNT_dec (grp->sv2);
		376	grp->sv2 = 0;
		377	break;
		378	}
		379	}
		380
		381	unblock_sig ();
		382	}
		383
		384	static void aio_grp_dec (aio_req grp)
		385	{
		386	--grp->size;
		387
		388	/* call feeder, if applicable */
		389	aio_grp_feed (grp);
		390
		391	/* finish, if done */
		392	if (!grp->size && grp->int1)
		393	{
		394	block_sig ();
		395
		396	if (!req_invoke (grp))
		397	{
		398	req_free (grp);
		399	unblock_sig ();
		400	croak (0);
		401	}
		402
		403	req_free (grp);
		404	unblock_sig ();
		405	}
		406	}
		407
		408	static int req_invoke (aio_req req)
		409	{
		410	dSP;
		411
		412	if (req->flags & FLAG_SV1_RO_OFF)
		413	SvREADONLY_off (req->sv1);
		414
		415	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		416	{
		417	ENTER;
		418	SAVETMPS;
		419	PUSHMARK (SP);
		420	EXTEND (SP, 1);
		421
		422	switch (req->type)
		423	{
		424	case REQ_READDIR:
		425	{
		426	SV *rv = &PL_sv_undef;
		427
		428	if (req->result >= 0)
		429	{
		430	int i;
		431	char *buf = req->ptr2;
		432	AV *av = newAV ();
		433
		434	av_extend (av, req->result - 1);
		435
		436	for (i = 0; i < req->result; ++i)
		437	{
		438	SV *sv = newSVpv (buf, 0);
		439
		440	av_store (av, i, sv);
		441	buf += SvCUR (sv) + 1;
		442	}
		443
		444	rv = sv_2mortal (newRV_noinc ((SV *)av));
		445	}
		446
		447	PUSHs (rv);
		448	}
		449	break;
		450
		451	case REQ_OPEN:
		452	{
		453	/* convert fd to fh */
		454	SV *fh;
		455
		456	PUSHs (sv_2mortal (newSViv (req->result)));
		457	PUTBACK;
		458	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		459	SPAGAIN;
		460
		461	fh = POPs;
		462	PUSHMARK (SP);
		463	XPUSHs (fh);
		464	}
		465	break;
		466
		467	case REQ_GROUP:
		468	req->int1 = 2; /* mark group as finished */
		469
		470	if (req->sv1)
		471	{
		472	int i;
		473	AV *av = (AV *)req->sv1;
		474
		475	EXTEND (SP, AvFILL (av) + 1);
		476	for (i = 0; i <= AvFILL (av); ++i)
		477	PUSHs (*av_fetch (av, i, 0));
		478	}
		479	break;
		480
		481	case REQ_NOP:
		482	case REQ_BUSY:
		483	break;
		484
		485	case REQ_READLINK:
		486	if (req->result > 0)
		487	{
		488	SvCUR_set (req->sv2, req->result);
		489	*SvEND (req->sv2) = 0;
		490	PUSHs (req->sv2);
		491	}
		492	break;
		493
		494	case REQ_STAT:
		495	case REQ_LSTAT:
		496	case REQ_FSTAT:
		497	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		498	PL_laststatval = req->result;
		499	PL_statcache = *(Stat_t *)(req->ptr2);
		500	PUSHs (sv_2mortal (newSViv (req->result)));
		501	break;
		502
		503	case REQ_READ:
		504	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		505	*SvEND (req->sv2) = 0;
		506	PUSHs (sv_2mortal (newSViv (req->result)));
		507	break;
		508
		509	default:
		510	PUSHs (sv_2mortal (newSViv (req->result)));
		511	break;
		512	}
		513
		514	errno = req->errorno;
		515
		516	PUTBACK;
		517	call_sv (req->callback, G_VOID | G_EVAL);
		518	SPAGAIN;
		519
		520	FREETMPS;
		521	LEAVE;
		522	}
		523
		524	if (req->grp)
		525	{
		526	aio_req grp = req->grp;
		527
		528	/* unlink request */
		529	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		530	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		531
		532	if (grp->grp_first == req)
		533	grp->grp_first = req->grp_next;
		534
		535	aio_grp_dec (grp);
		536	}
		537
		538	return !SvTRUE (ERRSV);
		539	}
		540
88	static void free_req (aio_req req)	541	static void req_free (aio_req req)
89	{	542	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92
93	if (req->fh)	543	if (req->self)
		544	{
		545	sv_unmagic (req->self, PERL_MAGIC_ext);
94	SvREFCNT_dec (req->fh);	546	SvREFCNT_dec (req->self);
		547	}
95		548
96	if (req->fh2)	549	SvREFCNT_dec (req->sv1);
97	SvREFCNT_dec (req->fh2);	550	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	551	SvREFCNT_dec (req->callback);
104		552
105	if (req->type == REQ_READDIR && req->result >= 0)	553	if (req->flags & FLAG_PTR2_FREE)
106	free (req->data2ptr);	554	free (req->ptr2);
107		555
108	Safefree (req);	556	Safefree (req);
109	}	557	}
110		558
111	static void	559	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	560	{
114	if (nreqs && !ress)	561	aio_req sub;
		562
		563	if (grp->type != REQ_GROUP)
		564	return;
		565
		566	SvREFCNT_dec (grp->sv2);
		567	grp->sv2 = 0;
		568
		569	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		570	req_cancel (sub);
		571	}
		572
		573	static void req_cancel (aio_req req)
		574	{
		575	req->flags |= FLAG_CANCELLED;
		576
		577	req_cancel_subs (req);
		578	}
		579
		580	static void *aio_proc(void *arg);
		581
		582	static void start_thread (void)
		583	{
		584	worker *wrk = calloc (1, sizeof (worker));
		585
		586	if (!wrk)
		587	croak ("unable to allocate worker thread data");
		588
		589	LOCK (wrklock);
		590
		591	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
115	{	592	{
		593	wrk->prev = &wrk_first;
		594	wrk->next = wrk_first.next;
		595	wrk_first.next->prev = wrk;
		596	wrk_first.next = wrk;
		597	++started;
		598	}
		599	else
		600	free (wrk);
		601
		602	UNLOCK (wrklock);
		603	}
		604
		605	static void maybe_start_thread ()
		606	{
		607	if (get_nthreads () >= wanted)
		608	return;
		609
		610	/* todo: maybe use idle here, but might be less exact */
		611	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		612	return;
		613
		614	start_thread ();
		615	}
		616
		617	static void req_send (aio_req req)
		618	{
		619	block_sig ();
		620
		621	++nreqs;
		622
		623	LOCK (reqlock);
		624	++nready;
		625	reqq_push (&req_queue, req);
		626	COND_SIGNAL (reqwait);
		627	UNLOCK (reqlock);
		628
		629	unblock_sig ();
		630
		631	maybe_start_thread ();
		632	}
		633
		634	static void end_thread (void)
		635	{
		636	aio_req req;
		637
		638	Newz (0, req, 1, aio_cb);
		639
		640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
		642
		643	LOCK (reqlock);
		644	reqq_push (&req_queue, req);
		645	COND_SIGNAL (reqwait);
		646	UNLOCK (reqlock);
		647
		648	LOCK (wrklock);
		649	--started;
		650	UNLOCK (wrklock);
		651	}
		652
		653	static void set_max_idle (int nthreads)
		654	{
		655	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		656	max_idle = nthreads <= 0 ? 1 : nthreads;
		657	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		658	}
		659
		660	static void min_parallel (int nthreads)
		661	{
		662	if (wanted < nthreads)
		663	wanted = nthreads;
		664	}
		665
		666	static void max_parallel (int nthreads)
		667	{
		668	if (wanted > nthreads)
		669	wanted = nthreads;
		670
		671	while (started > wanted)
		672	end_thread ();
		673	}
		674
		675	static void poll_wait ()
		676	{
116	fd_set rfd;	677	fd_set rfd;
		678
		679	while (nreqs)
		680	{
		681	int size;
		682	if (WORDACCESS_UNSAFE) LOCK (reslock);
		683	size = res_queue.size;
		684	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		685
		686	if (size)
		687	return;
		688
		689	maybe_start_thread ();
		690
117	FD_ZERO(&rfd);	691	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	692	FD_SET(respipe [0], &rfd);
119		693
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	694	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	695	}
122	}	696	}
123		697
124	static int	698	static int poll_cb ()
125	poll_cb ()
126	{	699	{
127	dSP;	700	dSP;
128	int count = 0;	701	int count = 0;
		702	int maxreqs = max_poll_reqs;
129	int do_croak = 0;	703	int do_croak = 0;
		704	struct timeval tv_start, tv_now;
130	aio_req req;	705	aio_req req;
		706
		707	if (max_poll_time)
		708	gettimeofday (&tv_start, 0);
		709
		710	block_sig ();
131		711
132	for (;;)	712	for (;;)
133	{	713	{
134	pthread_mutex_lock (&reslock);	714	for (;;)
135	req = ress;
136
137	if (req)
138	{	715	{
139	ress = req->next;	716	maybe_start_thread ();
140		717
		718	LOCK (reslock);
		719	req = reqq_shift (&res_queue);
		720
141	if (!ress)	721	if (req)
142	{	722	{
		723	--npending;
		724
		725	if (!res_queue.size)
		726	{
143	/* read any signals sent by the worker threads */	727	/* read any signals sent by the worker threads */
144	char buf [32];	728	char buf [4];
145	while (read (respipe [0], buf, 32) == 32)	729	while (read (respipe [0], buf, 4) == 4)
		730	;
146	;	731	}
147
148	rese = 0;
149	}	732	}
150	}
151		733
152	pthread_mutex_unlock (&reslock);	734	UNLOCK (reslock);
153		735
154	if (!req)	736	if (!req)
155	break;	737	break;
156		738
157	nreqs--;	739	--nreqs;
158		740
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)	741	if (req->type == REQ_GROUP && req->size)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{	742	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	743	req->int1 = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	744	continue;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}	745	}
205	else	746	else
206	{	747	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));	748	if (!req_invoke (req))
208
209	if (req->type == REQ_OPEN)
210	{	749	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);	750	req_free (req);
		751	unblock_sig ();
234	croak (0);	752	croak (0);
235	}	753	}
		754
		755	count++;
236	}	756	}
237		757
238	LEAVE;	758	req_free (req);
239		759
240	errno = errorno;	760	if (maxreqs && !--maxreqs)
241	count++;	761	break;
		762
		763	if (max_poll_time)
		764	{
		765	gettimeofday (&tv_now, 0);
		766
		767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		768	break;
		769	}
242	}	770	}
243		771
244	free_req (req);	772	if (nreqs <= max_outstanding)
		773	break;
		774
		775	poll_wait ();
		776
		777	++maxreqs;
245	}	778	}
246		779
		780	unblock_sig ();
247	return count;	781	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}	782	}
342		783
343	static void create_pipe ()	784	static void create_pipe ()
344	{	785	{
345	if (pipe (respipe))	786	if (pipe (respipe))
…		…
362	/*	803	/*
363	* make our pread/pwrite safe against themselves, but not against	804	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,	805	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.	806	* but that's your problem, not mine.
366	*/	807	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	808	static mutex_t preadwritelock = MUTEX_INIT;
368		809
369	static ssize_t	810	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{	811	{
372	ssize_t res;	812	ssize_t res;
373	off_t ooffset;	813	off_t ooffset;
374		814
375	pthread_mutex_lock (&preadwritelock);	815	LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	816	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	817	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	818	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	819	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	820	UNLOCK (preadwritelock);
381		821
382	return res;	822	return res;
383	}	823	}
384		824
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)	825	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
387	{	826	{
388	ssize_t res;	827	ssize_t res;
389	off_t ooffset;	828	off_t ooffset;
390		829
391	pthread_mutex_lock (&preadwritelock);	830	LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	831	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	832	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	833	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	834	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	835	UNLOCK (preadwritelock);
397		836
398	return res;	837	return res;
399	}	838	}
		839	#endif
		840
		841	#ifndef HAVE_FUTIMES
		842
		843	# define utimes(path,times) aio_utimes (path, times)
		844	# define futimes(fd,times) aio_futimes (fd, times)
		845
		846	int aio_utimes (const char *filename, const struct timeval times[2])
		847	{
		848	if (times)
		849	{
		850	struct utimbuf buf;
		851
		852	buf.actime = times[0].tv_sec;
		853	buf.modtime = times[1].tv_sec;
		854
		855	return utime (filename, &buf);
		856	}
		857	else
		858	return utime (filename, 0);
		859	}
		860
		861	int aio_futimes (int fd, const struct timeval tv[2])
		862	{
		863	errno = ENOSYS;
		864	return -1;
		865	}
		866
400	#endif	867	#endif
401		868
402	#if !HAVE_FDATASYNC	869	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	870	# define fdatasync fsync
404	#endif	871	#endif
405		872
406	#if !HAVE_READAHEAD	873	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	874	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		875
409	static ssize_t	876	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
410	readahead (int fd, off_t offset, size_t count)
411	{	877	{
412	char readahead_buf[4096];	878	dBUF;
413		879
414	while (count > 0)	880	while (count > 0)
415	{	881	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	882	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
417		883
418	pread (fd, readahead_buf, len, offset);	884	pread (fd, aio_buf, len, offset);
419	offset += len;	885	offset += len;
420	count -= len;	886	count -= len;
421	}	887	}
422		888
423	errno = 0;	889	errno = 0;
424	}	890	}
		891
425	#endif	892	#endif
426		893
427	#if !HAVE_READDIR_R	894	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	895	# define readdir_r aio_readdir_r
429		896
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	897	static mutex_t readdirlock = MUTEX_INIT;
431		898
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	899	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	900	{
435	struct dirent *e;	901	struct dirent *e;
436	int errorno;	902	int errorno;
437		903
438	pthread_mutex_lock (&readdirlock);	904	LOCK (readdirlock);
439		905
440	e = readdir (dirp);	906	e = readdir (dirp);
441	errorno = errno;	907	errorno = errno;
442		908
443	if (e)	909	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	912	strcpy (ent->d_name, e->d_name);
447	}	913	}
448	else	914	else
449	*res = 0;	915	*res = 0;
450		916
451	pthread_mutex_unlock (&readdirlock);	917	UNLOCK (readdirlock);
452		918
453	errno = errorno;	919	errno = errorno;
454	return e ? 0 : -1;	920	return e ? 0 : -1;
455	}	921	}
456	#endif	922	#endif
457		923
458	/* sendfile always needs emulation */	924	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	925	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
461	{	926	{
462	ssize_t res;	927	ssize_t res;
463		928
464	if (!count)	929	if (!count)
465	return 0;	930	return 0;
…		…
476	{	941	{
477	off_t sbytes;	942	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	943	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		944
480	if (res < 0 && sbytes)	945	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	946	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	947	res = sbytes;
483	}	948	}
484		949
485	# elif __hpux	950	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	951	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
514	#endif	979	#endif
515	)	980	)
516	)	981	)
517	{	982	{
518	/* emulate sendfile. this is a major pain in the ass */	983	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	984	dBUF;
		985
520	res = 0;	986	res = 0;
521		987
522	while (count)	988	while (count)
523	{	989	{
524	ssize_t cnt;	990	ssize_t cnt;
525		991
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	992	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		993
528	if (cnt <= 0)	994	if (cnt <= 0)
529	{	995	{
530	if (cnt && !res) res = -1;	996	if (cnt && !res) res = -1;
531	break;	997	break;
532	}	998	}
533		999
534	cnt = write (ofd, buf, cnt);	1000	cnt = write (ofd, aio_buf, cnt);
535		1001
536	if (cnt <= 0)	1002	if (cnt <= 0)
537	{	1003	{
538	if (cnt && !res) res = -1;	1004	if (cnt && !res) res = -1;
539	break;	1005	break;
…		…
547		1013
548	return res;	1014	return res;
549	}	1015	}
550		1016
551	/* read a full directory */	1017	/* read a full directory */
552	static int	1018	static void scandir_ (aio_req req, worker *self)
553	scandir_ (const char *path, void **namesp)
554	{	1019	{
555	DIR *dirp = opendir (path);	1020	DIR *dirp;
556	union	1021	union
557	{	1022	{
558	struct dirent d;	1023	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1024	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;	1025	} *u;
561	struct dirent *entp;	1026	struct dirent *entp;
562	char *name, *names;	1027	char *name, *names;
563	int memlen = 4096;	1028	int memlen = 4096;
564	int memofs = 0;	1029	int memofs = 0;
565	int res = 0;	1030	int res = 0;
566	int errorno;	1031	int errorno;
567		1032
568	if (!dirp)	1033	LOCK (wrklock);
569	return -1;	1034	self->dirp = dirp = opendir (req->ptr1);
570		1035	self->dbuf = u = malloc (sizeof (*u));
		1036	req->flags |= FLAG_PTR2_FREE;
571	names = malloc (memlen);	1037	req->ptr2 = names = malloc (memlen);
		1038	UNLOCK (wrklock);
		1039
		1040	if (dirp && u && names)
		1041	for (;;)
		1042	{
		1043	errno = 0;
		1044	readdir_r (dirp, &u->d, &entp);
		1045
		1046	if (!entp)
		1047	break;
		1048
		1049	name = entp->d_name;
		1050
		1051	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1052	{
		1053	int len = strlen (name) + 1;
		1054
		1055	res++;
		1056
		1057	while (memofs + len > memlen)
		1058	{
		1059	memlen *= 2;
		1060	LOCK (wrklock);
		1061	req->ptr2 = names = realloc (names, memlen);
		1062	UNLOCK (wrklock);
		1063
		1064	if (!names)
		1065	break;
		1066	}
		1067
		1068	memcpy (names + memofs, name, len);
		1069	memofs += len;
		1070	}
		1071	}
		1072
		1073	if (errno)
		1074	res = -1;
		1075
		1076	req->result = res;
		1077	}
		1078
		1079	/*****************************************************************************/
		1080
		1081	static void *aio_proc (void *thr_arg)
		1082	{
		1083	aio_req req;
		1084	struct timespec ts;
		1085	worker *self = (worker *)thr_arg;
		1086
		1087	/* try to distribute timeouts somewhat evenly */
		1088	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1089	* (1000000000UL / 1024UL);
572		1090
573	for (;;)	1091	for (;;)
574	{	1092	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);	1093	ts.tv_sec = time (0) + IDLE_TIMEOUT;
576		1094
577	if (!entp)	1095	LOCK (reqlock);
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626		1096
627	for (;;)	1097	for (;;)
628	{	1098	{
629	req = reqs;	1099	self->req = req = reqq_shift (&req_queue);
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636		1100
637	if (req)	1101	if (req)
638	break;	1102	break;
639		1103
640	pthread_cond_wait (&reqwait, &reqlock);	1104	++idle;
		1105
		1106	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1107	== ETIMEDOUT)
		1108	{
		1109	if (idle > max_idle)
		1110	{
		1111	--idle;
		1112	UNLOCK (reqlock);
		1113	LOCK (wrklock);
		1114	--started;
		1115	UNLOCK (wrklock);
		1116	goto quit;
		1117	}
		1118
		1119	/* we are allowed to idle, so do so without any timeout */
		1120	COND_WAIT (reqwait, reqlock);
		1121	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1122	}
		1123
		1124	--idle;
641	}	1125	}
642		1126
643	pthread_mutex_unlock (&reqlock);	1127	--nready;
		1128
		1129	UNLOCK (reqlock);
644		1130
645	errno = 0; /* strictly unnecessary */	1131	errno = 0; /* strictly unnecessary */
646		1132
647	type = req->type;	1133	if (!(req->flags & FLAG_CANCELLED))
648
649	switch (type)	1134	switch (req->type)
		1135	{
		1136	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
		1137	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
		1138
		1139	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1140	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1141
		1142	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1143	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1144	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1145
		1146	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1147	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1148	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1149	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1150
		1151	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1152	case REQ_CLOSE: req->result = close (req->int1); break;
		1153	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1154	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1155	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
		1156	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1157	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1158	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1159	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1160	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1161
		1162	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1163	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1164	case REQ_READDIR: scandir_ (req, self); break;
		1165
		1166	case REQ_BUSY:
		1167	{
		1168	struct timeval tv;
		1169
		1170	tv.tv_sec = req->nv1;
		1171	tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
		1172
		1173	req->result = select (0, 0, 0, 0, &tv);
		1174	}
		1175
		1176	case REQ_UTIME:
		1177	case REQ_FUTIME:
		1178	{
		1179	struct timeval tv[2];
		1180	struct timeval *times;
		1181
		1182	if (req->nv1 != -1. || req->nv2 != -1.)
		1183	{
		1184	tv[0].tv_sec = req->nv1;
		1185	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1186	tv[1].tv_sec = req->nv2;
		1187	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1188
		1189	times = tv;
		1190	}
		1191	else
		1192	times = 0;
		1193
		1194
		1195	req->result = req->type == REQ_FUTIME
		1196	? futimes (req->int1, times)
		1197	: utimes (req->ptr1, times);
		1198	}
		1199
		1200	case REQ_GROUP:
		1201	case REQ_NOP:
		1202	break;
		1203
		1204	case REQ_QUIT:
		1205	goto quit;
		1206
		1207	default:
		1208	req->result = -1;
		1209	break;
		1210	}
		1211
		1212	req->errorno = errno;
		1213
		1214	LOCK (reslock);
		1215
		1216	++npending;
		1217
		1218	if (!reqq_push (&res_queue, req))
650	{	1219	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}
690	else
691	{
692	rese = ress = req;
693
694	/* write a dummy byte to the pipe so fh becomes ready */	1220	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);	1221	write (respipe [1], &respipe, 1);
		1222
		1223	/* optionally signal the main thread asynchronously */
		1224	if (main_sig)
		1225	pthread_kill (main_tid, main_sig);
696	}	1226	}
697		1227
698	pthread_mutex_unlock (&reslock);	1228	self->req = 0;
		1229	worker_clear (self);
		1230
		1231	UNLOCK (reslock);
699	}	1232	}
700	while (type != REQ_QUIT);	1233
		1234	quit:
		1235	LOCK (wrklock);
		1236	worker_free (self);
		1237	UNLOCK (wrklock);
701		1238
702	return 0;	1239	return 0;
703	}	1240	}
704		1241
705	/*****************************************************************************/	1242	/*****************************************************************************/
706		1243
707	static void atfork_prepare (void)	1244	static void atfork_prepare (void)
708	{	1245	{
709	pthread_mutex_lock (&reqlock);	1246	LOCK (wrklock);
710	pthread_mutex_lock (&reslock);	1247	LOCK (reqlock);
		1248	LOCK (reslock);
711	#if !HAVE_PREADWRITE	1249	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);	1250	LOCK (preadwritelock);
713	#endif	1251	#endif
714	#if !HAVE_READDIR_R	1252	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);	1253	LOCK (readdirlock);
716	#endif	1254	#endif
717	}	1255	}
718		1256
719	static void atfork_parent (void)	1257	static void atfork_parent (void)
720	{	1258	{
721	#if !HAVE_READDIR_R	1259	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);	1260	UNLOCK (readdirlock);
723	#endif	1261	#endif
724	#if !HAVE_PREADWRITE	1262	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);	1263	UNLOCK (preadwritelock);
726	#endif	1264	#endif
727	pthread_mutex_unlock (&reslock);	1265	UNLOCK (reslock);
728	pthread_mutex_unlock (&reqlock);	1266	UNLOCK (reqlock);
		1267	UNLOCK (wrklock);
729	}	1268	}
730		1269
731	static void atfork_child (void)	1270	static void atfork_child (void)
732	{	1271	{
733	aio_req prv;	1272	aio_req prv;
734		1273
735	started = 0;	1274	while (prv = reqq_shift (&req_queue))
		1275	req_free (prv);
736		1276
737	while (reqs)	1277	while (prv = reqq_shift (&res_queue))
		1278	req_free (prv);
		1279
		1280	while (wrk_first.next != &wrk_first)
738	{	1281	{
739	prv = reqs;	1282	worker *wrk = wrk_first.next;
740	reqs = prv->next;	1283
741	free_req (prv);	1284	if (wrk->req)
		1285	req_free (wrk->req);
		1286
		1287	worker_clear (wrk);
		1288	worker_free (wrk);
742	}	1289	}
743		1290
744	reqs = reqe = 0;	1291	started = 0;
745		1292	idle = 0;
746	while (ress)	1293	nreqs = 0;
747	{	1294	nready = 0;
748	prv = ress;	1295	npending = 0;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754		1296
755	close (respipe [0]);	1297	close (respipe [0]);
756	close (respipe [1]);	1298	close (respipe [1]);
757	create_pipe ();	1299	create_pipe ();
758		1300
759	atfork_parent ();	1301	atfork_parent ();
760	}	1302	}
761		1303
762	#define dREQ \	1304	#define dREQ \
763	aio_req req; \	1305	aio_req req; \
		1306	int req_pri = next_pri; \
		1307	next_pri = DEFAULT_PRI + PRI_BIAS; \
764	\	1308	\
765	if (SvOK (callback) && !SvROK (callback)) \	1309	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \	1310	croak ("callback must be undef or of reference type"); \
767	\	1311	\
768	Newz (0, req, 1, aio_cb); \	1312	Newz (0, req, 1, aio_cb); \
769	if (!req) \	1313	if (!req) \
770	croak ("out of memory during aio_req allocation"); \	1314	croak ("out of memory during aio_req allocation"); \
771	\	1315	\
772	req->callback = newSVsv (callback);	1316	req->callback = newSVsv (callback); \
		1317	req->pri = req_pri
		1318
		1319	#define REQ_SEND \
		1320	req_send (req); \
		1321	\
		1322	if (GIMME_V != G_VOID) \
		1323	XPUSHs (req_sv (req, AIO_REQ_KLASS));
773		1324
774	MODULE = IO::AIO PACKAGE = IO::AIO	1325	MODULE = IO::AIO PACKAGE = IO::AIO
775		1326
776	PROTOTYPES: ENABLE	1327	PROTOTYPES: ENABLE
777		1328
778	BOOT:	1329	BOOT:
779	{	1330	{
		1331	HV *stash = gv_stashpv ("IO::AIO", 1);
		1332
		1333	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1334	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1335	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1336	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1337	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1338	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1339	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1340
780	create_pipe ();	1341	create_pipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1342	ATFORK (atfork_prepare, atfork_parent, atfork_child);
782	}	1343	}
783		1344
784	void	1345	void
785	min_parallel(nthreads)	1346	max_poll_reqs (int nreqs)
786	int nthreads
787	PROTOTYPE: $	1347	PROTOTYPE: $
		1348	CODE:
		1349	max_poll_reqs = nreqs;
788		1350
789	void	1351	void
790	max_parallel(nthreads)	1352	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	1353	PROTOTYPE: $
		1354	CODE:
		1355	max_poll_time = nseconds * AIO_TICKS;
		1356
		1357	void
		1358	min_parallel (int nthreads)
		1359	PROTOTYPE: $
		1360
		1361	void
		1362	max_parallel (int nthreads)
		1363	PROTOTYPE: $
		1364
		1365	void
		1366	max_idle (int nthreads)
		1367	PROTOTYPE: $
		1368	CODE:
		1369	set_max_idle (nthreads);
793		1370
794	int	1371	int
795	max_outstanding(nreqs)	1372	max_outstanding (int maxreqs)
796	int nreqs	1373	PROTOTYPE: $
797	PROTOTYPE: $
798	CODE:	1374	CODE:
799	RETVAL = max_outstanding;	1375	RETVAL = max_outstanding;
800	max_outstanding = nreqs;	1376	max_outstanding = maxreqs;
		1377	OUTPUT:
		1378	RETVAL
801		1379
802	void	1380	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1381	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
804	SV * pathname
805	int flags
806	int mode
807	SV * callback
808	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
809	CODE:	1383	PPCODE:
810	{	1384	{
811	dREQ;	1385	dREQ;
812		1386
813	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
814	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
816	req->fd = flags;	1390	req->int1 = flags;
817	req->mode = mode;	1391	req->mode = mode;
818		1392
819	send_req (req);	1393	REQ_SEND;
820	}	1394	}
821		1395
822	void	1396	void
823	aio_close(fh,callback=&PL_sv_undef)	1397	aio_close (SV *fh, SV *callback=&PL_sv_undef)
824	SV * fh
825	SV * callback
826	PROTOTYPE: $;$	1398	PROTOTYPE: $;$
827	ALIAS:	1399	ALIAS:
828	aio_close = REQ_CLOSE	1400	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1401	aio_fsync = REQ_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1402	aio_fdatasync = REQ_FDATASYNC
831	CODE:	1403	PPCODE:
832	{	1404	{
833	dREQ;	1405	dREQ;
834		1406
835	req->type = ix;	1407	req->type = ix;
836	req->fh = newSVsv (fh);	1408	req->sv1 = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
838		1410
839	send_req (req);	1411	REQ_SEND (req);
840	}	1412	}
841		1413
842	void	1414	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1415	aio_read (SV *fh, UV offset, UV length, SV8 *data, UV dataoffset, SV *callback=&PL_sv_undef)
844	SV * fh
845	UV offset
846	UV length
847	SV * data
848	UV dataoffset
849	SV * callback
850	ALIAS:	1416	ALIAS:
851	aio_read = REQ_READ	1417	aio_read = REQ_READ
852	aio_write = REQ_WRITE	1418	aio_write = REQ_WRITE
853	PROTOTYPE: $$$$$;$	1419	PROTOTYPE: $$$$$;$
854	CODE:	1420	PPCODE:
855	{	1421	{
856	aio_req req;
857	STRLEN svlen;	1422	STRLEN svlen;
858	char *svptr = SvPVbyte (data, svlen);	1423	char *svptr = SvPVbyte (data, svlen);
859		1424
860	SvUPGRADE (data, SVt_PV);	1425	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);	1426	SvPOK_on (data);
…		…
873	length = svlen - dataoffset;	1438	length = svlen - dataoffset;
874	}	1439	}
875	else	1440	else
876	{	1441	{
877	/* read: grow scalar as necessary */	1442	/* read: grow scalar as necessary */
878	svptr = SvGROW (data, length + dataoffset);	1443	svptr = SvGROW (data, length + dataoffset + 1);
879	}	1444	}
880		1445
881	if (length < 0)	1446	if (length < 0)
882	croak ("length must not be negative");	1447	croak ("length must not be negative");
883		1448
884	{	1449	{
885	dREQ;	1450	dREQ;
886		1451
887	req->type = ix;	1452	req->type = ix;
888	req->fh = newSVsv (fh);	1453	req->sv1 = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1454	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
890	: IoOFP (sv_2io (fh)));	1455	: IoOFP (sv_2io (fh)));
891	req->offset = offset;	1456	req->offs = offset;
892	req->length = length;	1457	req->size = length;
893	req->data = SvREFCNT_inc (data);	1458	req->sv2 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	1459	req->ptr1 = (char *)svptr + dataoffset;
		1460	req->stroffset = dataoffset;
895		1461
896	if (!SvREADONLY (data))	1462	if (!SvREADONLY (data))
897	{	1463	{
898	SvREADONLY_on (data);	1464	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1465	req->flags |= FLAG_SV1_RO_OFF;
900	}	1466	}
901		1467
902	send_req (req);	1468	REQ_SEND;
903	}	1469	}
904	}	1470	}
905		1471
906	void	1472	void
		1473	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1474	PROTOTYPE: $$;$
		1475	PPCODE:
		1476	{
		1477	SV *data;
		1478	dREQ;
		1479
		1480	data = newSV (NAME_MAX);
		1481	SvPOK_on (data);
		1482
		1483	req->type = REQ_READLINK;
		1484	req->sv1 = newSVsv (path);
		1485	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1486	req->sv2 = data;
		1487	req->ptr1 = SvPVbyte_nolen (data);
		1488
		1489	REQ_SEND;
		1490	}
		1491
		1492	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1493	aio_sendfile (SV *out_fh, SV *in_fh, UV in_offset, UV length, SV *callback=&PL_sv_undef)
908	SV * out_fh
909	SV * in_fh
910	UV in_offset
911	UV length
912	SV * callback
913	PROTOTYPE: $$$$;$	1494	PROTOTYPE: $$$$;$
914	CODE:	1495	PPCODE:
915	{	1496	{
916	dREQ;	1497	dREQ;
917		1498
918	req->type = REQ_SENDFILE;	1499	req->type = REQ_SENDFILE;
919	req->fh = newSVsv (out_fh);	1500	req->sv1 = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1501	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
921	req->fh2 = newSVsv (in_fh);	1502	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1503	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
923	req->offset = in_offset;	1504	req->offs = in_offset;
924	req->length = length;	1505	req->size = length;
925		1506
926	send_req (req);	1507	REQ_SEND;
927	}	1508	}
928		1509
929	void	1510	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1511	aio_readahead (SV *fh, UV offset, IV length, SV *callback=&PL_sv_undef)
931	SV * fh
932	UV offset
933	IV length
934	SV * callback
935	PROTOTYPE: $$$;$	1512	PROTOTYPE: $$$;$
936	CODE:	1513	PPCODE:
937	{	1514	{
938	dREQ;	1515	dREQ;
939		1516
940	req->type = REQ_READAHEAD;	1517	req->type = REQ_READAHEAD;
941	req->fh = newSVsv (fh);	1518	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1519	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
943	req->offset = offset;	1520	req->offs = offset;
944	req->length = length;	1521	req->size = length;
945		1522
946	send_req (req);	1523	REQ_SEND;
947	}	1524	}
948		1525
949	void	1526	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1527	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
951	SV * fh_or_path
952	SV * callback
953	ALIAS:	1528	ALIAS:
954	aio_stat = REQ_STAT	1529	aio_stat = REQ_STAT
955	aio_lstat = REQ_LSTAT	1530	aio_lstat = REQ_LSTAT
956	CODE:	1531	PPCODE:
957	{	1532	{
958	dREQ;	1533	dREQ;
959		1534
960	New (0, req->statdata, 1, Stat_t);	1535	req->ptr2 = malloc (sizeof (Stat_t));
961	if (!req->statdata)	1536	if (!req->ptr2)
962	{	1537	{
963	free_req (req);	1538	req_free (req);
964	croak ("out of memory during aio_req->statdata allocation");	1539	croak ("out of memory during aio_stat statdata allocation");
965	}	1540	}
		1541
		1542	req->flags |= FLAG_PTR2_FREE;
		1543	req->sv1 = newSVsv (fh_or_path);
966		1544
967	if (SvPOK (fh_or_path))	1545	if (SvPOK (fh_or_path))
968	{	1546	{
969	req->type = ix;	1547	req->type = ix;
970	req->data = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);	1548	req->ptr1 = SvPVbyte_nolen (req->sv1);
972	}	1549	}
973	else	1550	else
974	{	1551	{
975	req->type = REQ_FSTAT;	1552	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1553	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}	1554	}
979		1555
980	send_req (req);	1556	REQ_SEND;
981	}	1557	}
982		1558
983	void	1559	void
		1560	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1561	PPCODE:
		1562	{
		1563	dREQ;
		1564
		1565	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1566	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1567	req->sv1 = newSVsv (fh_or_path);
		1568
		1569	if (SvPOK (fh_or_path))
		1570	{
		1571	req->type = REQ_UTIME;
		1572	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1573	}
		1574	else
		1575	{
		1576	req->type = REQ_FUTIME;
		1577	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1578	}
		1579
		1580	REQ_SEND;
		1581	}
		1582
		1583	void
		1584	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1585	PPCODE:
		1586	{
		1587	dREQ;
		1588
		1589	req->mode = mode;
		1590	req->sv1 = newSVsv (fh_or_path);
		1591
		1592	if (SvPOK (fh_or_path))
		1593	{
		1594	req->type = REQ_CHMOD;
		1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1596	}
		1597	else
		1598	{
		1599	req->type = REQ_FCHMOD;
		1600	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1601	}
		1602
		1603	REQ_SEND;
		1604	}
		1605
		1606	void
		1607	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1608	PPCODE:
		1609	{
		1610	dREQ;
		1611
		1612	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1613	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1614	req->sv1 = newSVsv (fh_or_path);
		1615
		1616	if (SvPOK (fh_or_path))
		1617	{
		1618	req->type = REQ_CHOWN;
		1619	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1620	}
		1621	else
		1622	{
		1623	req->type = REQ_FCHOWN;
		1624	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1625	}
		1626
		1627	REQ_SEND;
		1628	}
		1629
		1630	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1631	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
985	SV * pathname
986	SV * callback
987	ALIAS:	1632	ALIAS:
988	aio_unlink = REQ_UNLINK	1633	aio_unlink = REQ_UNLINK
989	aio_rmdir = REQ_RMDIR	1634	aio_rmdir = REQ_RMDIR
		1635	aio_readdir = REQ_READDIR
990	CODE:	1636	PPCODE:
991	{	1637	{
992	dREQ;	1638	dREQ;
993		1639
994	req->type = ix;	1640	req->type = ix;
995	req->data = newSVsv (pathname);	1641	req->sv1 = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	1642	req->ptr1 = SvPVbyte_nolen (req->sv1);
997
998	send_req (req);
999	}
1000		1643
		1644	REQ_SEND;
		1645	}
		1646
1001	void	1647	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1648	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
1003	SV * oldpath
1004	SV * newpath
1005	SV * callback
1006	CODE:	1649	PPCODE:
1007	{	1650	{
1008	dREQ;	1651	dREQ;
1009		1652
1010	req->type = REQ_SYMLINK;	1653	req->type = REQ_MKDIR;
1011	req->fh = newSVsv (oldpath);	1654	req->sv1 = newSVsv (pathname);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1655	req->ptr1 = SvPVbyte_nolen (req->sv1);
1013	req->data = newSVsv (newpath);	1656	req->mode = mode;
1014	req->dataptr = SvPVbyte_nolen (req->data);
1015
1016	send_req (req);
1017	}
1018		1657
		1658	REQ_SEND;
		1659	}
		1660
1019	void	1661	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1662	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1021	SV * pathname	1663	ALIAS:
1022	SV * callback	1664	aio_link = REQ_LINK
		1665	aio_symlink = REQ_SYMLINK
		1666	aio_rename = REQ_RENAME
1023	CODE:	1667	PPCODE:
1024	{	1668	{
1025	dREQ;	1669	dREQ;
1026		1670
1027	req->type = REQ_READDIR;	1671	req->type = ix;
1028	req->data = newSVsv (pathname);	1672	req->sv2 = newSVsv (oldpath);
1029	req->dataptr = SvPVbyte_nolen (req->data);	1673	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1674	req->sv1 = newSVsv (newpath);
		1675	req->ptr1 = SvPVbyte_nolen (req->sv1);
1030		1676
1031	send_req (req);	1677	REQ_SEND;
1032	}	1678	}
1033		1679
1034	void	1680	void
		1681	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1682	PPCODE:
		1683	{
		1684	dREQ;
		1685
		1686	req->type = REQ_MKNOD;
		1687	req->sv1 = newSVsv (pathname);
		1688	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1689	req->mode = (mode_t)mode;
		1690	req->offs = dev;
		1691
		1692	REQ_SEND;
		1693	}
		1694
		1695	void
		1696	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1697	PPCODE:
		1698	{
		1699	dREQ;
		1700
		1701	req->type = REQ_BUSY;
		1702	req->nv1 = delay < 0. ? 0. : delay;
		1703
		1704	REQ_SEND;
		1705	}
		1706
		1707	void
		1708	aio_group (SV *callback=&PL_sv_undef)
		1709	PROTOTYPE: ;$
		1710	PPCODE:
		1711	{
		1712	dREQ;
		1713
		1714	req->type = REQ_GROUP;
		1715
		1716	req_send (req);
		1717	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1718	}
		1719
		1720	void
		1721	aio_nop (SV *callback=&PL_sv_undef)
		1722	PPCODE:
		1723	{
		1724	dREQ;
		1725
		1726	req->type = REQ_NOP;
		1727
		1728	REQ_SEND;
		1729	}
		1730
		1731	int
		1732	aioreq_pri (int pri = 0)
		1733	PROTOTYPE: ;$
		1734	CODE:
		1735	RETVAL = next_pri - PRI_BIAS;
		1736	if (items > 0)
		1737	{
		1738	if (pri < PRI_MIN) pri = PRI_MIN;
		1739	if (pri > PRI_MAX) pri = PRI_MAX;
		1740	next_pri = pri + PRI_BIAS;
		1741	}
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	aioreq_nice (int nice = 0)
		1747	CODE:
		1748	nice = next_pri - nice;
		1749	if (nice < PRI_MIN) nice = PRI_MIN;
		1750	if (nice > PRI_MAX) nice = PRI_MAX;
		1751	next_pri = nice + PRI_BIAS;
		1752
		1753	void
1035	flush()	1754	flush ()
1036	PROTOTYPE:	1755	PROTOTYPE:
1037	CODE:	1756	CODE:
1038	while (nreqs)	1757	while (nreqs)
1039	{	1758	{
1040	poll_wait ();	1759	poll_wait ();
1041	poll_cb ();	1760	poll_cb ();
1042	}	1761	}
1043		1762
1044	void	1763	int
1045	poll()	1764	poll()
1046	PROTOTYPE:	1765	PROTOTYPE:
1047	CODE:	1766	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1767	poll_wait ();
1051	poll_cb ();	1768	RETVAL = poll_cb ();
1052	}	1769	OUTPUT:
		1770	RETVAL
1053		1771
1054	int	1772	int
1055	poll_fileno()	1773	poll_fileno()
1056	PROTOTYPE:	1774	PROTOTYPE:
1057	CODE:	1775	CODE:
…		…
1069		1787
1070	void	1788	void
1071	poll_wait()	1789	poll_wait()
1072	PROTOTYPE:	1790	PROTOTYPE:
1073	CODE:	1791	CODE:
1074	if (nreqs)
1075	poll_wait ();	1792	poll_wait ();
		1793
		1794	void
		1795	setsig (int signum = SIGIO)
		1796	PROTOTYPE: ;$
		1797	CODE:
		1798	{
		1799	if (block_sig_level)
		1800	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1801
		1802	LOCK (reslock);
		1803	main_tid = pthread_self ();
		1804	main_sig = signum;
		1805	UNLOCK (reslock);
		1806
		1807	if (main_sig && npending)
		1808	pthread_kill (main_tid, main_sig);
		1809	}
		1810
		1811	void
		1812	aio_block (SV *cb)
		1813	PROTOTYPE: &
		1814	PPCODE:
		1815	{
		1816	int count;
		1817
		1818	block_sig ();
		1819	PUSHMARK (SP);
		1820	PUTBACK;
		1821	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1822	SPAGAIN;
		1823	unblock_sig ();
		1824
		1825	if (SvTRUE (ERRSV))
		1826	croak (0);
		1827
		1828	XSRETURN (count);
		1829	}
1076		1830
1077	int	1831	int
1078	nreqs()	1832	nreqs()
1079	PROTOTYPE:	1833	PROTOTYPE:
1080	CODE:	1834	CODE:
1081	RETVAL = nreqs;	1835	RETVAL = nreqs;
1082	OUTPUT:	1836	OUTPUT:
1083	RETVAL	1837	RETVAL
1084		1838
		1839	int
		1840	nready()
		1841	PROTOTYPE:
		1842	CODE:
		1843	RETVAL = get_nready ();
		1844	OUTPUT:
		1845	RETVAL
		1846
		1847	int
		1848	npending()
		1849	PROTOTYPE:
		1850	CODE:
		1851	RETVAL = get_npending ();
		1852	OUTPUT:
		1853	RETVAL
		1854
		1855	int
		1856	nthreads()
		1857	PROTOTYPE:
		1858	CODE:
		1859	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1860	RETVAL = started;
		1861	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1862	OUTPUT:
		1863	RETVAL
		1864
		1865	PROTOTYPES: DISABLE
		1866
		1867	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1868
		1869	void
		1870	cancel (aio_req_ornot req)
		1871	CODE:
		1872	req_cancel (req);
		1873
		1874	void
		1875	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1876	CODE:
		1877	SvREFCNT_dec (req->callback);
		1878	req->callback = newSVsv (callback);
		1879
		1880	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1881
		1882	void
		1883	add (aio_req grp, ...)
		1884	PPCODE:
		1885	{
		1886	int i;
		1887	aio_req req;
		1888
		1889	if (main_sig && !block_sig_level)
		1890	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1891
		1892	if (grp->int1 == 2)
		1893	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1894
		1895	for (i = 1; i < items; ++i )
		1896	{
		1897	if (GIMME_V != G_VOID)
		1898	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1899
		1900	req = SvAIO_REQ (ST (i));
		1901
		1902	if (req)
		1903	{
		1904	++grp->size;
		1905	req->grp = grp;
		1906
		1907	req->grp_prev = 0;
		1908	req->grp_next = grp->grp_first;
		1909
		1910	if (grp->grp_first)
		1911	grp->grp_first->grp_prev = req;
		1912
		1913	grp->grp_first = req;
		1914	}
		1915	}
		1916	}
		1917
		1918	void
		1919	cancel_subs (aio_req_ornot req)
		1920	CODE:
		1921	req_cancel_subs (req);
		1922
		1923	void
		1924	result (aio_req grp, ...)
		1925	CODE:
		1926	{
		1927	int i;
		1928	AV *av;
		1929
		1930	grp->errorno = errno;
		1931
		1932	av = newAV ();
		1933
		1934	for (i = 1; i < items; ++i )
		1935	av_push (av, newSVsv (ST (i)));
		1936
		1937	SvREFCNT_dec (grp->sv1);
		1938	grp->sv1 = (SV *)av;
		1939	}
		1940
		1941	void
		1942	errno (aio_req grp, int errorno = errno)
		1943	CODE:
		1944	grp->errorno = errorno;
		1945
		1946	void
		1947	limit (aio_req grp, int limit)
		1948	CODE:
		1949	grp->int2 = limit;
		1950	aio_grp_feed (grp);
		1951
		1952	void
		1953	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1954	CODE:
		1955	{
		1956	SvREFCNT_dec (grp->sv2);
		1957	grp->sv2 = newSVsv (callback);
		1958
		1959	if (grp->int2 <= 0)
		1960	grp->int2 = 2;
		1961
		1962	aio_grp_feed (grp);
		1963	}
		1964

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