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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.195 by root, Mon Sep 26 20:19:08 2011 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9	#include <unistd.h>	16	#include <limits.h>
10	#include <fcntl.h>	17	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	18	#include <sched.h>
13	#include <endian.h>
14		19
15	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
16	#include <sys/syscall.h>	21	# include <sys/mman.h>
		22	#endif
17		23
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* perl namespace pollution */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	#undef VERSION
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		26
22	#if __i386 || __amd64	27	/* perl stupidly overrides readdir and maybe others */
23	# define STACKSIZE ( 256 * sizeof (long))	28	/* with thread-unsafe versions, imagine that :( */
24	#elif __ia64	29	#undef readdir
25	# define STACKSIZE (8192 * sizeof (long))	30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
26	#else	67	#else
27	# define STACKSIZE ( 512 * sizeof (long))	68
		69	#include <sys/time.h>
		70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
		295	# else
		296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		297	# endif
		298	#endif
		299	#ifndef MAP_HUGETLB
		300	# define MAP_HUGETLB 0
		301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
		304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
		314
		315	#ifndef makedev
		316	# define makedev(maj,min) (((maj) << 8) | (min))
		317	#endif
		318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
		324
		325	#ifndef PAGESIZE
		326	# define PAGESIZE sysconf (_SC_PAGESIZE)
28	#endif	327	#endif
29		328
30	enum {	329	enum {
31	REQ_QUIT,	330	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35	REQ_FSYNC, REQ_FDATASYNC,
36	};	331	};
37		332
38	typedef struct aio_cb {
39	struct aio_cb *next;
40
41	int type;
42
43	int fd;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;
55
56	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
		334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd *aio_wd;
57		336
58	static int started;	337	static SV *on_next_submit;
59	static int nreqs;	338	static int next_pri = EIO_PRI_DEFAULT;
60	static int reqpipe[2], respipe[2];	339	static int max_outstanding;
61		340
62	static aio_req qs, qe; /* queue start, queue end */	341	static s_epipe respipe;
63		342
64	static void *aio_proc(void *arg);	343	static void req_destroy (aio_req req);
		344	static void req_cancel (aio_req req);
65		345
66	static void	346	static void want_poll (void)
67	start_thread (void)
68	{	347	{
69	sigset_t fullsigset, oldsigset;	348	/* write a dummy byte to the pipe so fh becomes ready */
70	pthread_t tid;	349	s_epipe_signal (&respipe);
71	pthread_attr_t attr;
72
73	pthread_attr_init (&attr);
74	pthread_attr_setstacksize (&attr, STACKSIZE);
75	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76
77	sigfillset (&fullsigset);
78	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81	started++;
82
83	sigprocmask (SIG_SETMASK, &oldsigset, 0);
84	}	350	}
85		351
86	static void	352	static void done_poll (void)
87	send_reqs (void)
88	{	353	{
89	/* this write is atomic */	354	/* read any signals sent by the worker threads */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)	355	s_epipe_drain (&respipe);
91	{
92	qs = qs->next;
93	if (!qs) qe = 0;
94	}
95	}	356	}
96		357
97	static void	358	/* must be called at most once */
98	send_req (aio_req req)	359	static SV *req_sv (aio_req req, HV *stash)
99	{	360	{
100	nreqs++;	361	if (!req->self)
101	req->next = 0;
102
103	if (qe)
104	{	362	{
105	qe->next = req;	363	req->self = (SV *)newHV ();
106	qe = req;	364	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
107	}	365	}
108	else
109	qe = qs = req;
110		366
111	send_reqs ();	367	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
112	}	368	}
113		369
114	static void	370	static aio_req SvAIO_REQ (SV *sv)
115	end_thread (void)
116	{	371	{
117	aio_req req;	372	MAGIC *mg;
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120		373
121	send_req (req);	374	if (!SvROK (sv)
122	}	375	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		376	&& SvSTASH (SvRV (sv)) != aio_req_stash
		377	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		378	croak ("object of class IO::AIO::REQ expected");
123		379
124	static void	380	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
125	read_write (pTHX_
126	int dowrite, int fd, off_t offset, size_t length,
127	SV *data, STRLEN dataoffset, SV *callback)
128	{
129	aio_req req;
130	STRLEN svlen;
131	char *svptr = SvPV (data, svlen);
132		381
133	SvUPGRADE (data, SVt_PV);	382	return mg ? (aio_req)mg->mg_ptr : 0;
134	SvPOK_on (data);	383	}
135		384
136	if (dataoffset < 0)	385	static aio_wd SvAIO_WD (SV *sv)
137	dataoffset += svlen;	386	{
		387	if (!SvROK (sv)
		388	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		389	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		390	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
138		391
139	if (dataoffset < 0 || dataoffset > svlen)	392	return (aio_wd)(long)SvIVX (SvRV (sv));
140	croak ("data offset outside of string");	393	}
141		394
142	if (dowrite)	395	static void aio_grp_feed (aio_req grp)
		396	{
		397	if (grp->sv2 && SvOK (grp->sv2))
143	{	398	{
144	/* write: check length and adjust. */	399	dSP;
145	if (length < 0 || length + dataoffset > svlen)	400
146	length = svlen - dataoffset;	401	ENTER;
		402	SAVETMPS;
		403	PUSHMARK (SP);
		404	XPUSHs (req_sv (grp, aio_grp_stash));
		405	PUTBACK;
		406	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		407	SPAGAIN;
		408	FREETMPS;
		409	LEAVE;
147	}	410	}
148	else	411	}
		412
		413	static void req_submit (eio_req *req)
		414	{
		415	eio_submit (req);
		416
		417	if (expect_false (on_next_submit))
149	{	418	{
150	/* read: grow scalar as necessary */	419	dSP;
151	svptr = SvGROW (data, length + dataoffset);	420	SV *cb = sv_2mortal (on_next_submit);
		421
		422	on_next_submit = 0;
		423
		424	PUSHMARK (SP);
		425	PUTBACK;
		426	call_sv (cb, G_DISCARD | G_EVAL);
152	}	427	}
153
154	if (length < 0)
155	croak ("length must not be negative");
156
157	Newz (0, req, 1, aio_cb);
158
159	if (!req)
160	croak ("out of memory during aio_req allocation");
161
162	req->type = dowrite ? REQ_WRITE : REQ_READ;
163	req->fd = fd;
164	req->offset = offset;
165	req->length = length;
166	req->data = SvREFCNT_inc (data);
167	req->dataptr = (char *)svptr + dataoffset;
168	req->callback = SvREFCNT_inc (callback);
169
170	send_req (req);
171	}	428	}
172		429
173	static void	430	static int req_invoke (eio_req *req)
174	poll_wait ()
175	{	431	{
176	fd_set rfd;	432	if (req->flags & FLAG_SV2_RO_OFF)
177	FD_ZERO(&rfd);	433	SvREADONLY_off (req->sv2);
178	FD_SET(respipe[0], &rfd);
179		434
180	select (respipe[0] + 1, &rfd, 0, 0, 0);	435	if (!EIO_CANCELLED (req) && req->callback)
181	}
182
183	static int
184	poll_cb (pTHX)
185	{
186	dSP;
187	int count = 0;
188	aio_req req;
189
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
191	{	436	{
192	nreqs--;	437	dSP;
		438	static SV *sv_result_cache; /* caches the result integer SV */
		439	SV *sv_result;
193		440
194	if (req->type == REQ_QUIT)	441	ENTER;
195	started--;	442	SAVETMPS;
		443	PUSHMARK (SP);
		444	EXTEND (SP, 1);
		445
		446	/* do not recreate the result IV from scratch each time */
		447	if (expect_true (sv_result_cache))
		448	{
		449	sv_result = sv_result_cache; sv_result_cache = 0;
		450	SvIV_set (sv_result, req->result);
		451	SvIOK_only (sv_result);
		452	}
196	else	453	else
197	{	454	{
198	int errorno = errno;	455	sv_result = newSViv (req->result);
199	errno = req->errorno;	456	SvREADONLY_on (sv_result);
		457	}
200		458
201	if (req->type == REQ_READ)	459	switch (req->type)
202	SvCUR_set (req->data, req->dataoffset	460	{
203	+ req->result > 0 ? req->result : 0);	461	case EIO_WD_OPEN:
		462	PUSHs (sv_2mortal (sv_bless (newRV_noinc (newSViv (((long)req->wd))), aio_wd_stash)));
		463	break;
204		464
205	if (req->data)	465	case EIO_READDIR:
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209	{	466	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	467	SV *rv = &PL_sv_undef;
211	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);
213		468
214	Safefree (req->statdata);	469	if (req->result >= 0)
		470	{
		471	int i;
		472	char *names = (char *)req->ptr2;
		473	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		474	AV *av = newAV ();
		475
		476	av_extend (av, req->result - 1);
		477
		478	for (i = 0; i < req->result; ++i)
		479	{
		480	if (req->int1 & EIO_READDIR_DENTS)
		481	{
		482	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		483
		484	if (req->int1 & EIO_READDIR_CUSTOM2)
		485	{
		486	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		487	AV *avent = newAV ();
		488
		489	av_extend (avent, 2);
		490
		491	if (!sv_type [ent->type])
		492	{
		493	sv_type [ent->type] = newSViv (ent->type);
		494	SvREADONLY_on (sv_type [ent->type]);
		495	}
		496
		497	av_store (avent, 0, namesv);
		498	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		499	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		500
		501	av_store (av, i, newRV_noinc ((SV *)avent));
		502	}
		503	else
		504	av_store (av, i, namesv);
		505
		506	++ent;
		507	}
		508	else
		509	{
		510	SV *name = newSVpv (names, 0);
		511	av_store (av, i, name);
		512	names += SvCUR (name) + 1;
		513	}
		514	}
		515
		516	rv = sv_2mortal (newRV_noinc ((SV *)av));
		517	}
		518
		519	PUSHs (rv);
		520
		521	if (req->int1 & EIO_READDIR_CUSTOM1)
		522	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
215	}	523	}
		524	break;
216		525
217	PUSHMARK (SP);	526	case EIO_OPEN:
218	XPUSHs (sv_2mortal (newSViv (req->result)));
219
220	if (req->type == REQ_OPEN)
221	{	527	{
222	/* convert fd to fh */	528	/* convert fd to fh */
223	SV *fh;	529	SV *fh = &PL_sv_undef;
224		530
225	PUTBACK;	531	if (req->result >= 0)
226	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	532	{
227	SPAGAIN;	533	GV *gv = (GV *)sv_newmortal ();
		534	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		535	char sym [64];
		536	int symlen;
		537
		538	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		539	gv_init (gv, aio_stash, sym, symlen, 0);
228		540
229	fh = POPs;	541	symlen = snprintf (
		542	sym,
		543	sizeof (sym),
		544	"%s&=%d",
		545	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		546	(int)req->result
		547	);
230		548
231	PUSHMARK (SP);	549	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		550	fh = (SV *)gv;
		551	}
		552
232	XPUSHs (fh);	553	PUSHs (fh);
233	}	554	}
		555	break;
234		556
235	PUTBACK;	557	case EIO_STATVFS:
236	call_sv (req->callback, G_VOID | G_EVAL);	558	case EIO_FSTATVFS:
237	SPAGAIN;
238		559	{
239	if (req->callback)	560	SV *rv = &PL_sv_undef;
240	SvREFCNT_dec (req->callback);	561
		562	#ifndef _WIN32
		563	if (req->result >= 0)
		564	{
		565	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		566	HV *hv = newHV ();
241		567
242	errno = errorno;	568	rv = sv_2mortal (newRV_noinc ((SV *)hv));
243	count++;	569
		570	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		571	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		572	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		573	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		574	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		575	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		576	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		577	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		578	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		579	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		580	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		581	}
		582	#endif
		583
		584	PUSHs (rv);
244	}	585	}
245		586
246	Safefree (req);	587	break;
247	}
248		588
249	if (qs)	589	case EIO_GROUP:
250	send_reqs ();	590	req->int1 = 2; /* mark group as finished */
251		591
252	return count;	592	if (req->sv1)
253	}	593	{
		594	int i;
		595	AV *av = (AV *)req->sv1;
254		596
255	static void *	597	EXTEND (SP, AvFILL (av) + 1);
256	aio_proc (void *thr_arg)	598	for (i = 0; i <= AvFILL (av); ++i)
257	{	599	PUSHs (*av_fetch (av, i, 0));
258	aio_req req;	600	}
		601	break;
259		602
260	/* then loop */	603	case EIO_NOP:
261	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	604	case EIO_BUSY:
262	{	605	break;
263	errno = 0; /* strictly unnecessary */
264		606
265	switch (req->type)	607	case EIO_READLINK:
		608	case EIO_REALPATH:
		609	if (req->result > 0)
		610	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		611	break;
		612
		613	case EIO_STAT:
		614	case EIO_LSTAT:
		615	case EIO_FSTAT:
		616	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		617	PL_laststatval = req->result;
		618	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		619	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		620	PUSHs (sv_result);
		621	break;
		622
		623	case EIO_READ:
266	{	624	{
267	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	625	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
268	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	626	*SvEND (req->sv2) = 0;
269	#if SYS_readahead	627	SvPOK_only (req->sv2);
270	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	628	SvSETMAGIC (req->sv2);
271	#else	629	PUSHs (sv_result);
272	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;	630	}
273	#endif	631	break;
274		632
275	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	633	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
276	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	634	if (req->result > 0)
277	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	635	SvIV_set (sv_result, 0);
278		636	/* FALLTHROUGH */
279	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280	case REQ_CLOSE: req->result = close (req->fd); break;
281	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283	case REQ_FSYNC: req->result = fsync (req->fd); break;
284	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
285
286	case REQ_QUIT:
287	write (respipe[1], (void *)&req, sizeof (req));
288	return 0;
289		637
290	default:	638	default:
291	req->result = ENOSYS;	639	PUSHs (sv_result);
292	break;	640	break;
293	}	641	}
294		642
295	req->errorno = errno;	643	errno = req->errorno;
296	write (respipe[1], (void *)&req, sizeof (req));	644
		645	PUTBACK;
		646	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		647	SPAGAIN;
		648
		649	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		650	SvREFCNT_dec (sv_result);
		651	else
		652	sv_result_cache = sv_result;
		653
		654	FREETMPS;
		655	LEAVE;
		656
		657	PUTBACK;
297	}	658	}
298		659
		660	return !!SvTRUE (ERRSV);
		661	}
		662
		663	static void req_destroy (aio_req req)
		664	{
		665	if (req->self)
		666	{
		667	sv_unmagic (req->self, PERL_MAGIC_ext);
		668	SvREFCNT_dec (req->self);
		669	}
		670
		671	SvREFCNT_dec (req->sv1);
		672	SvREFCNT_dec (req->sv2);
		673	SvREFCNT_dec (req->sv3);
		674	SvREFCNT_dec (req->sv4);
		675	SvREFCNT_dec (req->callback);
		676
		677	Safefree (req);
		678	}
		679
		680	static void req_cancel_subs (aio_req grp)
		681	{
		682	if (grp->type != EIO_GROUP)
		683	return;
		684
		685	SvREFCNT_dec (grp->sv2);
		686	grp->sv2 = 0;
		687
		688	eio_grp_cancel (grp);
		689	}
		690
		691	static void create_respipe (void)
		692	{
		693	if (s_epipe_renew (&respipe))
		694	croak ("IO::AIO: unable to initialize result pipe");
		695	}
		696
		697	static void poll_wait (void)
		698	{
		699	while (eio_nreqs ())
		700	{
		701	int size;
		702
		703	X_LOCK (reslock);
		704	size = res_queue.size;
		705	X_UNLOCK (reslock);
		706
		707	if (size)
		708	return;
		709
		710	etp_maybe_start_thread ();
		711
		712	s_epipe_wait (&respipe);
		713	}
		714	}
		715
		716	static int poll_cb (void)
		717	{
		718	for (;;)
		719	{
		720	int res = eio_poll ();
		721
		722	if (res > 0)
		723	croak (0);
		724
		725	if (!max_outstanding || max_outstanding > eio_nreqs ())
		726	return res;
		727
		728	poll_wait ();
		729	}
		730	}
		731
		732	static void ecb_cold
		733	reinit (void)
		734	{
		735	create_respipe ();
		736
		737	if (eio_init (want_poll, done_poll) < 0)
		738	croak ("IO::AIO: unable to initialise eio library");
		739	}
		740
		741	/*****************************************************************************/
		742
		743	#if !_POSIX_MAPPED_FILES
		744	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		745	# define munmap(addr,length) (errno = ENOSYS, -1)
		746	#endif
		747
		748	#if !_POSIX_MEMORY_PROTECTION
		749	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		750	# define PROT_NONE 0
		751	# define PROT_WRITE 0
		752	# define MAP_PRIVATE 0
		753	# define MAP_SHARED 0
		754	# define MAP_FIXED 0
		755	#endif
		756
		757	#define MMAP_MAGIC PERL_MAGIC_ext
		758
		759	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		760	{
		761	int old_errno = errno;
		762	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		763	errno = old_errno;
		764
		765	mg->mg_obj = 0; /* just in case */
		766
		767	SvREADONLY_off (sv);
		768
		769	if (SvPVX (sv) != mg->mg_ptr)
		770	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		771
		772	SvCUR_set (sv, 0);
		773	SvPVX (sv) = 0;
		774	SvOK_off (sv);
		775
299	return 0;	776	return 0;
300	}	777	}
301		778
		779	static MGVTBL mmap_vtbl = {
		780	0, 0, 0, 0, mmap_free
		781	};
		782
		783	/*****************************************************************************/
		784
		785	static SV * get_cb (SV *cb_sv)
		786	{
		787	SvGETMAGIC (cb_sv);
		788	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		789	}
		790
		791	#define dREQ \
		792	SV *cb_cv; \
		793	aio_req req; \
		794	int req_pri = next_pri; \
		795	next_pri = EIO_PRI_DEFAULT; \
		796	\
		797	cb_cv = get_cb (callback); \
		798	\
		799	Newz (0, req, 1, eio_req); \
		800	if (!req) \
		801	croak ("out of memory during eio_req allocation"); \
		802	\
		803	req->callback = SvREFCNT_inc (cb_cv); \
		804	req->pri = req_pri
		805
		806	#define REQ_SEND \
		807	PUTBACK; \
		808	req_submit (req); \
		809	SPAGAIN; \
		810	\
		811	if (GIMME_V != G_VOID) \
		812	XPUSHs (req_sv (req, aio_req_stash));
		813
		814	static void
		815	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		816	{
		817	if (SvROK (path))
		818	{
		819	AV *av = (AV *)SvRV (path);
		820	SV *wdob;
		821
		822	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		823	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		824
		825	path = AvARRAY (av)[1];
		826	wdob = AvARRAY (av)[0];
		827
		828	*wd = SvAIO_WD (wdob);
		829	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		830	}
		831
		832	*pathsv = newSVsv (path);
		833	*ptr = SvPVbyte_nolen (*pathsv);
		834	}
		835
		836	static void
		837	req_set_path1 (aio_req req, SV *path)
		838	{
		839	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		840	}
		841
		842	static void
		843	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		844	{
		845	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		846
		847	switch (SvTYPE (rv))
		848	{
		849	case SVt_PVIO:
		850	case SVt_PVLV:
		851	case SVt_PVGV:
		852	req->type = type_fh;
		853	req->sv1 = newSVsv (fh_or_path);
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	break;
		856
		857	default:
		858	req->type = type_path;
		859	req_set_path1 (req, fh_or_path);
		860	break;
		861	}
		862
		863	}
		864
302	MODULE = IO::AIO PACKAGE = IO::AIO	865	MODULE = IO::AIO PACKAGE = IO::AIO
303		866
		867	PROTOTYPES: ENABLE
		868
304	BOOT:	869	BOOT:
305	{	870	{
306	if (pipe (reqpipe) || pipe (respipe))	871	static const struct {
307	croak ("unable to initialize request or result pipe");	872	const char *name;
		873	IV iv;
		874	} *civ, const_iv[] = {
		875	# define const_niv(name, value) { # name, (IV) value },
		876	# define const_iv(name) { # name, (IV) name },
		877	# define const_eio(name) { # name, (IV) EIO_ ## name },
		878	const_iv (EXDEV)
		879	const_iv (ENOSYS)
		880	const_iv (O_RDONLY)
		881	const_iv (O_WRONLY)
		882	const_iv (O_RDWR)
		883	const_iv (O_CREAT)
		884	const_iv (O_TRUNC)
		885	const_iv (O_EXCL)
		886	const_iv (O_APPEND)
308		887
309	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))	888	const_iv (O_ASYNC)
310	croak ("cannot set result pipe to nonblocking mode");	889	const_iv (O_DIRECT)
		890	const_iv (O_NOATIME)
311		891
312	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	892	const_iv (O_CLOEXEC)
313	croak ("cannot set result pipe to nonblocking mode");	893	const_iv (O_NOCTTY)
314	}	894	const_iv (O_NOFOLLOW)
		895	const_iv (O_NONBLOCK)
		896	const_iv (O_EXEC)
		897	const_iv (O_SEARCH)
		898	const_iv (O_DIRECTORY)
		899	const_iv (O_DSYNC)
		900	const_iv (O_RSYNC)
		901	const_iv (O_SYNC)
		902	const_iv (O_TTY_INIT)
315		903
		904	const_iv (S_IFIFO)
		905	const_iv (S_IFCHR)
		906	const_iv (S_IFBLK)
		907	const_iv (S_IFLNK)
		908	const_iv (S_IFREG)
		909	const_iv (S_IFDIR)
		910	const_iv (S_IFWHT)
		911	const_iv (S_IFSOCK)
		912	const_iv (S_IFMT)
		913
		914	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		915	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		916	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		917	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		918	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		919	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		920
		921	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		922	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		923	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		924	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		925	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		926
		927	const_iv (ST_RDONLY)
		928	const_iv (ST_NOSUID)
		929	const_iv (ST_NODEV)
		930	const_iv (ST_NOEXEC)
		931	const_iv (ST_SYNCHRONOUS)
		932	const_iv (ST_MANDLOCK)
		933	const_iv (ST_WRITE)
		934	const_iv (ST_APPEND)
		935	const_iv (ST_IMMUTABLE)
		936	const_iv (ST_NOATIME)
		937	const_iv (ST_NODIRATIME)
		938	const_iv (ST_RELATIME)
		939
		940	const_iv (PROT_NONE)
		941	const_iv (PROT_EXEC)
		942	const_iv (PROT_READ)
		943	const_iv (PROT_WRITE)
		944
		945	/*const_iv (MAP_FIXED)*/
		946	const_iv (MAP_PRIVATE)
		947	const_iv (MAP_SHARED)
		948	const_iv (MAP_ANONYMOUS)
		949
		950	/* linuxish */
		951	const_iv (MAP_HUGETLB)
		952	const_iv (MAP_LOCKED)
		953	const_iv (MAP_NORESERVE)
		954	const_iv (MAP_POPULATE)
		955	const_iv (MAP_NONBLOCK)
		956
		957	const_eio (MCL_FUTURE)
		958	const_eio (MCL_CURRENT)
		959
		960	const_eio (MS_ASYNC)
		961	const_eio (MS_INVALIDATE)
		962	const_eio (MS_SYNC)
		963
		964	const_eio (MT_MODIFY)
		965
		966	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		967	const_eio (SYNC_FILE_RANGE_WRITE)
		968	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		969
		970	const_eio (FALLOC_FL_KEEP_SIZE)
		971
		972	const_eio (READDIR_DENTS)
		973	const_eio (READDIR_DIRS_FIRST)
		974	const_eio (READDIR_STAT_ORDER)
		975	const_eio (READDIR_FOUND_UNKNOWN)
		976
		977	const_eio (DT_UNKNOWN)
		978	const_eio (DT_FIFO)
		979	const_eio (DT_CHR)
		980	const_eio (DT_DIR)
		981	const_eio (DT_BLK)
		982	const_eio (DT_REG)
		983	const_eio (DT_LNK)
		984	const_eio (DT_SOCK)
		985	const_eio (DT_WHT)
		986	};
		987
		988	aio_stash = gv_stashpv ("IO::AIO" , 1);
		989	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		990	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		991	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		992
		993	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		994	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		995
		996	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		997
		998	reinit ();
		999	}
		1000
316	void	1001	void
317	min_parallel(nthreads)	1002	reinit ()
318	int nthreads	1003	PROTOTYPE:
		1004
		1005	void
		1006	max_poll_reqs (unsigned int nreqs)
319	PROTOTYPE: $	1007	PROTOTYPE: $
320	CODE:	1008	CODE:
321	while (nthreads > started)	1009	eio_set_max_poll_reqs (nreqs);
322	start_thread ();
323		1010
324	void	1011	void
325	max_parallel(nthreads)	1012	max_poll_time (double nseconds)
326	int nthreads
327	PROTOTYPE: $	1013	PROTOTYPE: $
328	CODE:	1014	CODE:
		1015	eio_set_max_poll_time (nseconds);
		1016
		1017	void
		1018	min_parallel (unsigned int nthreads)
		1019	PROTOTYPE: $
		1020	CODE:
		1021	eio_set_min_parallel (nthreads);
		1022
		1023	void
		1024	max_parallel (unsigned int nthreads)
		1025	PROTOTYPE: $
		1026	CODE:
		1027	eio_set_max_parallel (nthreads);
		1028
		1029	void
		1030	max_idle (unsigned int nthreads)
		1031	PROTOTYPE: $
		1032	CODE:
		1033	eio_set_max_idle (nthreads);
		1034
		1035	void
		1036	idle_timeout (unsigned int seconds)
		1037	PROTOTYPE: $
		1038	CODE:
		1039	eio_set_idle_timeout (seconds);
		1040
		1041	void
		1042	max_outstanding (unsigned int maxreqs)
		1043	PROTOTYPE: $
		1044	CODE:
		1045	max_outstanding = maxreqs;
		1046
		1047	void
		1048	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1049	PPCODE:
329	{	1050	{
330	int cur = started;	1051	dREQ;
331	while (cur > nthreads)	1052
332	{	1053	req->type = EIO_WD_OPEN;
333	end_thread ();	1054	req_set_path1 (req, pathname);
		1055
		1056	REQ_SEND;
		1057	}
		1058
		1059	void
		1060	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	dREQ;
		1064
		1065	req->type = EIO_OPEN;
		1066	req_set_path1 (req, pathname);
		1067	req->int1 = flags;
		1068	req->int2 = mode;
		1069
		1070	REQ_SEND;
		1071	}
		1072
		1073	void
		1074	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1075	ALIAS:
		1076	aio_fsync = EIO_FSYNC
		1077	aio_fdatasync = EIO_FDATASYNC
		1078	aio_syncfs = EIO_SYNCFS
		1079	PPCODE:
		1080	{
		1081	int fd = s_fileno_croak (fh, 0);
		1082	dREQ;
		1083
		1084	req->type = ix;
		1085	req->sv1 = newSVsv (fh);
		1086	req->int1 = fd;
		1087
		1088	REQ_SEND (req);
		1089	}
		1090
		1091	void
		1092	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1093	PPCODE:
		1094	{
		1095	int fd = s_fileno_croak (fh, 0);
		1096	dREQ;
		1097
		1098	req->type = EIO_SYNC_FILE_RANGE;
		1099	req->sv1 = newSVsv (fh);
		1100	req->int1 = fd;
		1101	req->offs = offset;
		1102	req->size = nbytes;
		1103	req->int2 = flags;
		1104
		1105	REQ_SEND (req);
		1106	}
		1107
		1108	void
		1109	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1110	PPCODE:
		1111	{
		1112	int fd = s_fileno_croak (fh, 0);
		1113	dREQ;
		1114
		1115	req->type = EIO_FALLOCATE;
		1116	req->sv1 = newSVsv (fh);
		1117	req->int1 = fd;
		1118	req->int2 = mode;
		1119	req->offs = offset;
		1120	req->size = len;
		1121
		1122	REQ_SEND (req);
		1123	}
		1124
		1125	void
		1126	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1127	PPCODE:
		1128	{
		1129	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1130	int fd = s_fileno_croak (fh, 0);
		1131	dREQ;
		1132
		1133	if (expect_false (close_fd < 0))
		1134	{
		1135	int pipefd [2];
		1136
		1137	if (
		1138	#ifdef _WIN32
		1139	_pipe (pipefd, 1, _O_BINARY) < 0
		1140	#else
		1141	pipe (pipefd) < 0
		1142	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1143	#endif
		1144	|| close (pipefd [1]) < 0
334	cur--;	1145	)
		1146	abort (); /*D*/
		1147
		1148	close_fd = pipefd [0];
335	}	1149	}
336		1150
337	while (started > nthreads)	1151	req->type = EIO_DUP2;
		1152	req->int1 = close_fd;
		1153	req->sv2 = newSVsv (fh);
		1154	req->int2 = fd;
		1155
		1156	REQ_SEND (req);
		1157	}
		1158
		1159	void
		1160	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1161	ALIAS:
		1162	aio_read = EIO_READ
		1163	aio_write = EIO_WRITE
		1164	PPCODE:
		1165	{
		1166	STRLEN svlen;
		1167	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1168	char *svptr = SvPVbyte (data, svlen);
		1169	UV len = SvUV (length);
		1170
		1171	if (dataoffset < 0)
		1172	dataoffset += svlen;
		1173
		1174	if (dataoffset < 0 || dataoffset > svlen)
		1175	croak ("dataoffset outside of data scalar");
		1176
		1177	if (ix == EIO_WRITE)
338	{	1178	{
339	poll_wait ();	1179	/* write: check length and adjust. */
340	poll_cb (aTHX);	1180	if (!SvOK (length) || len + dataoffset > svlen)
341	}	1181	len = svlen - dataoffset;
342	}
343
344	void
345	aio_open(pathname,flags,mode,callback)
346	SV * pathname
347	int flags
348	int mode
349	SV * callback
350	PROTOTYPE: $$$$
351	CODE:
352	{
353	aio_req req;
354
355	Newz (0, req, 1, aio_cb);
356
357	if (!req)
358	croak ("out of memory during aio_req allocation");
359
360	req->type = REQ_OPEN;
361	req->data = newSVsv (pathname);
362	req->dataptr = SvPV_nolen (req->data);
363	req->fd = flags;
364	req->mode = mode;
365	req->callback = SvREFCNT_inc (callback);
366
367	send_req (req);
368	}
369
370	void
371	aio_close(fh,callback)
372	InputStream fh
373	SV * callback
374	PROTOTYPE: $$
375	ALIAS:
376	aio_close = REQ_CLOSE
377	aio_fsync = REQ_FSYNC
378	aio_fdatasync = REQ_FDATASYNC
379	CODE:
380	{
381	aio_req req;
382
383	Newz (0, req, 1, aio_cb);
384
385	if (!req)
386	croak ("out of memory during aio_req allocation");
387
388	req->type = ix;
389	req->fd = PerlIO_fileno (fh);
390	req->callback = SvREFCNT_inc (callback);
391
392	send_req (req);
393	}
394
395	void
396	aio_read(fh,offset,length,data,dataoffset,callback)
397	InputStream fh
398	UV offset
399	IV length
400	SV * data
401	IV dataoffset
402	SV * callback
403	PROTOTYPE: $$$$$$
404	CODE:
405	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407	void
408	aio_write(fh,offset,length,data,dataoffset,callback)
409	OutputStream fh
410	UV offset
411	IV length
412	SV * data
413	IV dataoffset
414	SV * callback
415	PROTOTYPE: $$$$$$
416	CODE:
417	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419	void
420	aio_readahead(fh,offset,length,callback)
421	InputStream fh
422	UV offset
423	IV length
424	SV * callback
425	PROTOTYPE: $$$$
426	CODE:
427	{
428	aio_req req;
429
430	if (length < 0)
431	croak ("length must not be negative");
432
433	Newz (0, req, 1, aio_cb);
434
435	if (!req)
436	croak ("out of memory during aio_req allocation");
437
438	req->type = REQ_READAHEAD;
439	req->fd = PerlIO_fileno (fh);
440	req->offset = offset;
441	req->length = length;
442	req->callback = SvREFCNT_inc (callback);
443
444	send_req (req);
445	}
446
447	void
448	aio_stat(fh_or_path,callback)
449	SV * fh_or_path
450	SV * callback
451	PROTOTYPE: $$
452	ALIAS:
453	aio_lstat = 1
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	New (0, req->statdata, 1, Stat_t);
464
465	if (!req->statdata)
466	croak ("out of memory during aio_req->statdata allocation");
467
468	if (SvPOK (fh_or_path))
469	{
470	req->type = ix ? REQ_LSTAT : REQ_STAT;
471	req->data = newSVsv (fh_or_path);
472	req->dataptr = SvPV_nolen (req->data);
473	}	1182	}
474	else	1183	else
475	{	1184	{
476	req->type = REQ_FSTAT;	1185	/* read: check type and grow scalar as necessary */
477	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1186	SvUPGRADE (data, SVt_PV);
		1187	svptr = SvGROW (data, len + dataoffset + 1);
478	}	1188	}
479		1189
		1190	{
		1191	dREQ;
		1192
		1193	req->type = ix;
		1194	req->sv1 = newSVsv (fh);
		1195	req->int1 = fd;
		1196	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1197	req->size = len;
480	req->callback = SvREFCNT_inc (callback);	1198	req->sv2 = SvREFCNT_inc (data);
		1199	req->ptr2 = (char *)svptr + dataoffset;
		1200	req->stroffset = dataoffset;
481		1201
482	send_req (req);	1202	if (!SvREADONLY (data))
483	}	1203	{
		1204	SvREADONLY_on (data);
		1205	req->flags |= FLAG_SV2_RO_OFF;
		1206	}
484		1207
		1208	REQ_SEND;
		1209	}
		1210	}
		1211
485	void	1212	void
486	aio_unlink(pathname,callback)	1213	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
487	SV * pathname	1214	ALIAS:
488	SV * callback	1215	aio_readlink = EIO_READLINK
489	PROTOTYPE: $$	1216	aio_realpath = EIO_REALPATH
		1217	PPCODE:
		1218	{
		1219	dREQ;
		1220
		1221	req->type = ix;
		1222	req_set_path1 (req, pathname);
		1223
		1224	REQ_SEND;
		1225	}
		1226
		1227	void
		1228	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1229	PPCODE:
		1230	{
		1231	int ifd = s_fileno_croak (in_fh , 0);
		1232	int ofd = s_fileno_croak (out_fh, 1);
		1233	dREQ;
		1234
		1235	req->type = EIO_SENDFILE;
		1236	req->sv1 = newSVsv (out_fh);
		1237	req->int1 = ofd;
		1238	req->sv2 = newSVsv (in_fh);
		1239	req->int2 = ifd;
		1240	req->offs = in_offset;
		1241	req->size = length;
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	void
		1247	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1248	PPCODE:
		1249	{
		1250	int fd = s_fileno_croak (fh, 0);
		1251	dREQ;
		1252
		1253	req->type = EIO_READAHEAD;
		1254	req->sv1 = newSVsv (fh);
		1255	req->int1 = fd;
		1256	req->offs = offset;
		1257	req->size = length;
		1258
		1259	REQ_SEND;
		1260	}
		1261
		1262	void
		1263	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1264	ALIAS:
		1265	aio_stat = EIO_STAT
		1266	aio_lstat = EIO_LSTAT
		1267	aio_statvfs = EIO_STATVFS
490	CODE:	1268	PPCODE:
491	{	1269	{
492	aio_req req;	1270	dREQ;
		1271
		1272	req->sv1 = newSVsv (fh_or_path);
		1273	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1274	REQ_SEND;
		1275	}
		1276
		1277	UV
		1278	major (UV dev)
		1279	ALIAS:
		1280	minor = 1
		1281	CODE:
		1282	RETVAL = ix ? major (dev) : minor (dev);
		1283	OUTPUT:
		1284	RETVAL
		1285
		1286	UV
		1287	makedev (UV maj, UV min)
		1288	CODE:
		1289	RETVAL = makedev (maj, min);
		1290	OUTPUT:
		1291	RETVAL
		1292
		1293	void
		1294	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1300	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1301	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1302
		1303	REQ_SEND;
		1304	}
		1305
		1306	void
		1307	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1308	PPCODE:
		1309	{
		1310	dREQ;
		1311
		1312	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1313	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1314
		1315	REQ_SEND;
		1316	}
		1317
		1318	void
		1319	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1320	ALIAS:
		1321	aio_chmod = EIO_CHMOD
		1322	aio_mkdir = EIO_MKDIR
		1323	PPCODE:
		1324	{
		1325	dREQ;
		1326
		1327	req->int2 = mode;
		1328	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1329
		1330	REQ_SEND;
		1331	}
		1332
		1333	void
		1334	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1335	PPCODE:
		1336	{
		1337	dREQ;
		1338
		1339	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1340	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1341	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1342
		1343	REQ_SEND;
		1344	}
		1345
		1346	void
		1347	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1348	PPCODE:
		1349	{
		1350	dREQ;
493		1351
494	Newz (0, req, 1, aio_cb);	1352	req->type = EIO_READDIR;
		1353	req->sv1 = newSVsv (pathname);
		1354	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1355	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1356
		1357	if (flags & EIO_READDIR_DENTS)
		1358	req->int1 |= EIO_READDIR_CUSTOM2;
		1359
		1360	REQ_SEND;
		1361	}
		1362
		1363	void
		1364	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1365	ALIAS:
		1366	aio_unlink = EIO_UNLINK
		1367	aio_rmdir = EIO_RMDIR
		1368	aio_readdir = EIO_READDIR
		1369	PPCODE:
		1370	{
		1371	dREQ;
495		1372
496	if (!req)	1373	req->type = ix;
497	croak ("out of memory during aio_req allocation");	1374	req_set_path1 (req, pathname);
		1375
		1376	REQ_SEND;
		1377	}
		1378
		1379	void
		1380	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1381	ALIAS:
		1382	aio_link = EIO_LINK
		1383	aio_symlink = EIO_SYMLINK
		1384	aio_rename = EIO_RENAME
		1385	PPCODE:
		1386	{
		1387	dREQ;
		1388	eio_wd wd2;
498		1389
499	req->type = REQ_UNLINK;	1390	req->type = ix;
500	req->data = newSVsv (pathname);	1391	req_set_path1 (req, oldpath);
501	req->dataptr = SvPV_nolen (req->data);	1392	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
502	req->callback = SvREFCNT_inc (callback);	1393	req->int3 = (long)wd2;
503		1394
504	send_req (req);	1395	REQ_SEND;
		1396	}
		1397
		1398	void
		1399	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1400	PPCODE:
		1401	{
		1402	dREQ;
		1403
		1404	req->type = EIO_MKNOD;
		1405	req->int2 = (mode_t)mode;
		1406	req->offs = dev;
		1407	req_set_path1 (req, pathname);
		1408
		1409	REQ_SEND;
		1410	}
		1411
		1412	void
		1413	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1414	ALIAS:
		1415	aio_mtouch = EIO_MTOUCH
		1416	aio_msync = EIO_MSYNC
		1417	PPCODE:
		1418	{
		1419	STRLEN svlen;
		1420	char *svptr = SvPVbyte (data, svlen);
		1421	UV len = SvUV (length);
		1422
		1423	if (offset < 0)
		1424	offset += svlen;
		1425
		1426	if (offset < 0 || offset > svlen)
		1427	croak ("offset outside of scalar");
		1428
		1429	if (!SvOK (length) || len + offset > svlen)
		1430	len = svlen - offset;
		1431
		1432	{
		1433	dREQ;
		1434
		1435	req->type = ix;
		1436	req->sv2 = SvREFCNT_inc (data);
		1437	req->ptr2 = (char *)svptr + offset;
		1438	req->size = len;
		1439	req->int1 = flags;
		1440
		1441	REQ_SEND;
		1442	}
		1443	}
		1444
		1445	void
		1446	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1447	PPCODE:
		1448	{
		1449	STRLEN svlen;
		1450	char *svptr = SvPVbyte (data, svlen);
		1451	UV len = SvUV (length);
		1452
		1453	if (offset < 0)
		1454	offset += svlen;
		1455
		1456	if (offset < 0 || offset > svlen)
		1457	croak ("offset outside of scalar");
		1458
		1459	if (!SvOK (length) || len + offset > svlen)
		1460	len = svlen - offset;
		1461
		1462	{
		1463	dREQ;
		1464
		1465	req->type = EIO_MLOCK;
		1466	req->sv2 = SvREFCNT_inc (data);
		1467	req->ptr2 = (char *)svptr + offset;
		1468	req->size = len;
		1469
		1470	REQ_SEND;
		1471	}
		1472	}
		1473
		1474	void
		1475	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1476	PPCODE:
		1477	{
		1478	dREQ;
		1479
		1480	req->type = EIO_MLOCKALL;
		1481	req->int1 = flags;
		1482
		1483	REQ_SEND;
		1484	}
		1485
		1486	void
		1487	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1488	PPCODE:
		1489	{
		1490	dREQ;
		1491
		1492	req->type = EIO_BUSY;
		1493	req->nv1 = delay < 0. ? 0. : delay;
		1494
		1495	REQ_SEND;
		1496	}
		1497
		1498	void
		1499	aio_group (SV *callback=&PL_sv_undef)
		1500	PPCODE:
		1501	{
		1502	dREQ;
		1503
		1504	req->type = EIO_GROUP;
		1505
		1506	req_submit (req);
		1507	XPUSHs (req_sv (req, aio_grp_stash));
		1508	}
		1509
		1510	void
		1511	aio_nop (SV *callback=&PL_sv_undef)
		1512	ALIAS:
		1513	aio_nop = EIO_NOP
		1514	aio_sync = EIO_SYNC
		1515	PPCODE:
		1516	{
		1517	dREQ;
		1518
		1519	req->type = ix;
		1520
		1521	REQ_SEND;
505	}	1522	}
506		1523
507	int	1524	int
508	poll_fileno()	1525	aioreq_pri (int pri = 0)
509	PROTOTYPE:
510	CODE:	1526	CODE:
511	RETVAL = respipe[0];	1527	RETVAL = next_pri;
		1528	if (items > 0)
		1529	{
		1530	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1531	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1532	next_pri = pri;
		1533	}
512	OUTPUT:	1534	OUTPUT:
513	RETVAL	1535	RETVAL
514		1536
		1537	void
		1538	aioreq_nice (int nice = 0)
		1539	CODE:
		1540	nice = next_pri - nice;
		1541	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1542	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1543	next_pri = nice;
		1544
		1545	void
		1546	flush ()
		1547	CODE:
		1548	while (eio_nreqs ())
		1549	{
		1550	poll_wait ();
		1551	poll_cb ();
		1552	}
		1553
515	int	1554	int
516	poll_cb(...)	1555	poll ()
517	PROTOTYPE:
518	CODE:	1556	CODE:
		1557	poll_wait ();
519	RETVAL = poll_cb (aTHX);	1558	RETVAL = poll_cb ();
520	OUTPUT:	1559	OUTPUT:
521	RETVAL	1560	RETVAL
522		1561
523	void
524	poll_wait()
525	PROTOTYPE:
526	CODE:
527	poll_wait ();
528
529	int	1562	int
530	nreqs()	1563	poll_fileno ()
531	PROTOTYPE:
532	CODE:	1564	CODE:
533	RETVAL = nreqs;	1565	RETVAL = s_epipe_fd (&respipe);
534	OUTPUT:	1566	OUTPUT:
535	RETVAL	1567	RETVAL
536		1568
		1569	int
		1570	poll_cb (...)
		1571	PROTOTYPE:
		1572	CODE:
		1573	RETVAL = poll_cb ();
		1574	OUTPUT:
		1575	RETVAL
		1576
		1577	void
		1578	poll_wait ()
		1579	CODE:
		1580	poll_wait ();
		1581
		1582	int
		1583	nreqs ()
		1584	CODE:
		1585	RETVAL = eio_nreqs ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	nready ()
		1591	CODE:
		1592	RETVAL = eio_nready ();
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	npending ()
		1598	CODE:
		1599	RETVAL = eio_npending ();
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	nthreads ()
		1605	CODE:
		1606	RETVAL = eio_nthreads ();
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	int
		1611	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1612	CODE:
		1613	RETVAL = posix_fadvise (fh, offset, length, advice);
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	IV
		1618	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1619	CODE:
		1620	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	void
		1625	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1626	PPCODE:
		1627	sv_unmagic (scalar, MMAP_MAGIC);
		1628	{
		1629	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1630	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1631	if (addr == (void *)-1)
		1632	XSRETURN_NO;
		1633
		1634	sv_force_normal (scalar);
		1635
		1636	/* we store the length in mg_obj, as namlen is I32 :/ */
		1637	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1638	->mg_obj = (SV *)length;
		1639
		1640	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1641
		1642	if (!(prot & PROT_WRITE))
		1643	SvREADONLY_on (scalar);
		1644
		1645	if (SvLEN (scalar))
		1646	Safefree (SvPVX (scalar));
		1647
		1648	SvPVX (scalar) = (char *)addr;
		1649	SvCUR_set (scalar, length);
		1650	SvLEN_set (scalar, 0);
		1651	SvPOK_only (scalar);
		1652
		1653	XSRETURN_YES;
		1654	}
		1655
		1656	void
		1657	munmap (SV *scalar)
		1658	CODE:
		1659	sv_unmagic (scalar, MMAP_MAGIC);
		1660
		1661	int
		1662	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1663	ALIAS:
		1664	mprotect = 1
		1665	CODE:
		1666	{
		1667	STRLEN svlen;
		1668	void *addr = SvPVbyte (scalar, svlen);
		1669	size_t len = SvUV (length);
		1670
		1671	if (offset < 0)
		1672	offset += svlen;
		1673
		1674	if (offset < 0 || offset > svlen)
		1675	croak ("offset outside of scalar");
		1676
		1677	if (!SvOK (length) || len + offset > svlen)
		1678	len = svlen - offset;
		1679
		1680	addr = (void *)(((intptr_t)addr) + offset);
		1681	eio_page_align (&addr, &len);
		1682
		1683	switch (ix)
		1684	{
		1685	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1686	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1687	}
		1688	}
		1689	OUTPUT:
		1690	RETVAL
		1691
		1692	int
		1693	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1694	CODE:
		1695	{
		1696	STRLEN svlen;
		1697	void *addr = SvPVbyte (scalar, svlen);
		1698	size_t len = SvUV (length);
		1699
		1700	if (offset < 0)
		1701	offset += svlen;
		1702
		1703	if (offset < 0 || offset > svlen)
		1704	croak ("offset outside of scalar");
		1705
		1706	if (!SvOK (length) || len + offset > svlen)
		1707	len = svlen - offset;
		1708
		1709	addr = (void *)(((intptr_t)addr) + offset);
		1710	eio_page_align (&addr, &len);
		1711	#if _POSIX_MEMLOCK_RANGE
		1712	RETVAL = munlock (addr, len);
		1713	#else
		1714	RETVAL = ((errno = ENOSYS), -1);
		1715	#endif
		1716	}
		1717	OUTPUT:
		1718	RETVAL
		1719
		1720	int
		1721	munlockall ()
		1722	CODE:
		1723	#if _POSIX_MEMLOCK
		1724	munlockall ();
		1725	#else
		1726	RETVAL = -1;
		1727	errno = ENOSYS;
		1728	#endif
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	void _on_next_submit (SV *cb)
		1733	CODE:
		1734	SvREFCNT_dec (on_next_submit);
		1735	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1736
		1737	PROTOTYPES: DISABLE
		1738
		1739	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1740
		1741	void
		1742	DESTROY (SV *self)
		1743	CODE:
		1744	{
		1745	aio_wd wd = SvAIO_WD (self);
		1746	#if HAVE_AT
		1747	SV *callback = &PL_sv_undef;
		1748	dREQ; /* clobbers next_pri :/ */
		1749	req->type = EIO_WD_CLOSE;
		1750	req->wd = wd;
		1751	REQ_SEND;
		1752	#else
		1753	eio_wd_close_sync (wd);
		1754	#endif
		1755	}
		1756
		1757	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1758
		1759	void
		1760	cancel (aio_req_ornot req)
		1761	CODE:
		1762	eio_cancel (req);
		1763
		1764	void
		1765	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1766	PPCODE:
		1767	{
		1768	if (GIMME_V != G_VOID)
		1769	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1770
		1771	if (items > 1)
		1772	{
		1773	SV *cb_cv =get_cb (callback);
		1774
		1775	SvREFCNT_dec (req->callback);
		1776	req->callback = SvREFCNT_inc (cb_cv);
		1777	}
		1778	}
		1779
		1780	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1781
		1782	void
		1783	add (aio_req grp, ...)
		1784	PPCODE:
		1785	{
		1786	int i;
		1787
		1788	if (grp->int1 == 2)
		1789	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1790
		1791	for (i = 1; i < items; ++i )
		1792	{
		1793	aio_req req;
		1794
		1795	if (GIMME_V != G_VOID)
		1796	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1797
		1798	req = SvAIO_REQ (ST (i));
		1799
		1800	if (req)
		1801	eio_grp_add (grp, req);
		1802	}
		1803	}
		1804
		1805	void
		1806	cancel_subs (aio_req_ornot req)
		1807	CODE:
		1808	req_cancel_subs (req);
		1809
		1810	void
		1811	result (aio_req grp, ...)
		1812	CODE:
		1813	{
		1814	int i;
		1815	AV *av;
		1816
		1817	grp->errorno = errno;
		1818
		1819	av = newAV ();
		1820	av_extend (av, items - 1);
		1821
		1822	for (i = 1; i < items; ++i )
		1823	av_push (av, newSVsv (ST (i)));
		1824
		1825	SvREFCNT_dec (grp->sv1);
		1826	grp->sv1 = (SV *)av;
		1827	}
		1828
		1829	void
		1830	errno (aio_req grp, int errorno = errno)
		1831	CODE:
		1832	grp->errorno = errorno;
		1833
		1834	void
		1835	limit (aio_req grp, int limit)
		1836	CODE:
		1837	eio_grp_limit (grp, limit);
		1838
		1839	void
		1840	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1841	CODE:
		1842	{
		1843	SvREFCNT_dec (grp->sv2);
		1844	grp->sv2 = newSVsv (callback);
		1845	grp->feed = aio_grp_feed;
		1846
		1847	if (grp->int2 <= 0)
		1848	grp->int2 = 2;
		1849
		1850	eio_grp_limit (grp, grp->int2);
		1851	}
		1852

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