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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 1.209 by root, Sun Apr 1 17:46:02 2012 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
		67	#define EIO_STRUCT_STAT struct _stati64
		68	#define EIO_STRUCT_STATI64
		69
26	#else	70	#else
27	# define STACKSIZE ( 512 * sizeof (long))	71
		72	#include <sys/time.h>
		73	#include <sys/select.h>
		74	#include <unistd.h>
		75	#include <utime.h>
		76	#include <signal.h>
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	#endif
		81
		82	/* use NV for 32 bit perls as it allows larger offsets */
		83	#if IVSIZE >= 8
		84	# define VAL64 IV
		85	# define SvVAL64 SvIV
		86	# define newSVval64 newSViv
		87	#else
		88	# define VAL64 NV
		89	# define SvVAL64 SvNV
		90	# define newSVval64 newSVnv
		91	#endif
		92
		93	/*****************************************************************************/
		94
		95	#if __GNUC__ >= 3
		96	# define expect(expr,value) __builtin_expect ((expr),(value))
		97	#else
		98	# define expect(expr,value) (expr)
		99	#endif
		100
		101	#define expect_false(expr) expect ((expr) != 0, 0)
		102	#define expect_true(expr) expect ((expr) != 0, 1)
		103
		104	/*****************************************************************************/
		105
		106	typedef SV SV8; /* byte-sv, used for argument-checking */
		107	typedef int aio_rfd; /* read file desriptor */
		108	typedef int aio_wfd; /* write file descriptor */
		109
		110	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	SV *sv3, *sv4; \
		116	STRLEN stroffset; \
		117	SV *self;
		118
		119	#define EIO_NO_WRAPPERS 1
		120
		121	#include "libeio/config.h"
		122	#include "libeio/eio.h"
		123
		124	static int req_invoke (eio_req *req);
		125	#define EIO_FINISH(req) req_invoke (req)
		126	static void req_destroy (eio_req *grp);
		127	#define EIO_DESTROY(req) req_destroy (req)
		128
		129	#include "libeio/eio.c"
		130
		131	/* Linux/others */
		132	#ifndef O_ASYNC
		133	# define O_ASYNC 0
		134	#endif
		135	#ifndef O_DIRECT
		136	# define O_DIRECT 0
		137	#endif
		138	#ifndef O_NOATIME
		139	# define O_NOATIME 0
		140	#endif
		141
		142	/* POSIX */
		143	#ifndef O_CLOEXEC
		144	# define O_CLOEXEC 0
		145	#endif
		146	#ifndef O_NOFOLLOW
		147	# define O_NOFOLLOW 0
		148	#endif
		149	#ifndef O_NOCTTY
		150	# define O_NOCTTY 0
		151	#endif
		152	#ifndef O_NONBLOCK
		153	# define O_NONBLOCK 0
		154	#endif
		155	#ifndef O_EXEC
		156	# define O_EXEC 0
		157	#endif
		158	#ifndef O_SEARCH
		159	# define O_SEARCH 0
		160	#endif
		161	#ifndef O_DIRECTORY
		162	# define O_DIRECTORY 0
		163	#endif
		164	#ifndef O_DSYNC
		165	# define O_DSYNC 0
		166	#endif
		167	#ifndef O_RSYNC
		168	# define O_RSYNC 0
		169	#endif
		170	#ifndef O_SYNC
		171	# define O_SYNC 0
		172	#endif
		173	#ifndef O_TTY_INIT
		174	# define O_TTY_INIT 0
		175	#endif
		176
		177	#ifndef POSIX_FADV_NORMAL
		178	# define POSIX_FADV_NORMAL 0
		179	#endif
		180	#ifndef POSIX_FADV_SEQUENTIAL
		181	# define POSIX_FADV_SEQUENTIAL 0
		182	#endif
		183	#ifndef POSIX_FADV_RANDOM
		184	# define POSIX_FADV_RANDOM 0
		185	#endif
		186	#ifndef POSIX_FADV_NOREUSE
		187	# define POSIX_FADV_NOREUSE 0
		188	#endif
		189	#ifndef POSIX_FADV_WILLNEED
		190	# define POSIX_FADV_WILLNEED 0
		191	#endif
		192	#ifndef POSIX_FADV_DONTNEED
		193	# define POSIX_FADV_DONTNEED 0
		194	#endif
		195
		196	#if !HAVE_POSIX_FADVISE
		197	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#ifndef POSIX_MADV_NORMAL
		201	# define POSIX_MADV_NORMAL 0
		202	#endif
		203	#ifndef POSIX_MADV_SEQUENTIAL
		204	# define POSIX_MADV_SEQUENTIAL 0
		205	#endif
		206	#ifndef POSIX_MADV_RANDOM
		207	# define POSIX_MADV_RANDOM 0
		208	#endif
		209	#ifndef POSIX_MADV_WILLNEED
		210	# define POSIX_MADV_WILLNEED 0
		211	#endif
		212	#ifndef POSIX_MADV_DONTNEED
		213	# define POSIX_MADV_DONTNEED 0
		214	#endif
		215
		216	#if !HAVE_POSIX_MADVISE
		217	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		218	#endif
		219
		220	#ifndef PROT_NONE
		221	# define PROT_NONE 0
		222	#endif
		223	#ifndef PROT_READ
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_WRITE
		227	# define PROT_READ 0
		228	#endif
		229	#ifndef PROT_EXEC
		230	# define PROT_EXEC 0
		231	#endif
		232
		233	#ifndef ST_RDONLY
		234	# define ST_RDONLY 0
		235	#endif
		236	#ifndef ST_NOSUID
		237	# define ST_NOSUID 0
		238	#endif
		239	#ifndef ST_NODEV
		240	# define ST_NODEV 0
		241	#endif
		242	#ifndef ST_NOEXEC
		243	# define ST_NOEXEC 0
		244	#endif
		245	#ifndef ST_SYNCHRONOUS
		246	# define ST_SYNCHRONOUS 0
		247	#endif
		248	#ifndef ST_MANDLOCK
		249	# define ST_MANDLOCK 0
		250	#endif
		251	#ifndef ST_WRITE
		252	# define ST_WRITE 0
		253	#endif
		254	#ifndef ST_APPEND
		255	# define ST_APPEND 0
		256	#endif
		257	#ifndef ST_IMMUTABLE
		258	# define ST_IMMUTABLE 0
		259	#endif
		260	#ifndef ST_NOATIME
		261	# define ST_NOATIME 0
		262	#endif
		263	#ifndef ST_NODIRATIME
		264	# define ST_NODIRATIME 0
		265	#endif
		266	#ifndef ST_RELATIME
		267	# define ST_RELATIME 0
		268	#endif
		269
		270	#ifndef S_IFIFO
		271	# define S_IFIFO 0
		272	#endif
		273	#ifndef S_IFCHR
		274	# define S_IFCHR 0
		275	#endif
		276	#ifndef S_IFBLK
		277	# define S_IFBLK 0
		278	#endif
		279	#ifndef S_IFLNK
		280	# define S_IFLNK 0
		281	#endif
		282	#ifndef S_IFREG
		283	# define S_IFREG 0
		284	#endif
		285	#ifndef S_IFDIR
		286	# define S_IFDIR 0
		287	#endif
		288	#ifndef S_IFWHT
		289	# define S_IFWHT 0
		290	#endif
		291	#ifndef S_IFSOCK
		292	# define S_IFSOCK 0
		293	#endif
		294
		295	#ifndef MAP_ANONYMOUS
		296	# ifdef MAP_ANON
		297	# define MAP_ANONYMOUS MAP_ANON
		298	# else
		299	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		300	# endif
		301	#endif
		302	#ifndef MAP_HUGETLB
		303	# define MAP_HUGETLB 0
		304	#endif
		305	#ifndef MAP_LOCKED
		306	# define MAP_LOCKED 0
		307	#endif
		308	#ifndef MAP_NORESERVE
		309	# define MAP_NORESERVE 0
		310	#endif
		311	#ifndef MAP_POPULATE
		312	# define MAP_POPULATE 0
		313	#endif
		314	#ifndef MAP_NONBLOCK
		315	# define MAP_NONBLOCK 0
		316	#endif
		317
		318	#ifndef makedev
		319	# define makedev(maj,min) (((maj) << 8) | (min))
		320	#endif
		321	#ifndef major
		322	# define major(dev) ((dev) >> 8)
		323	#endif
		324	#ifndef minor
		325	# define minor(dev) ((dev) & 0xff)
		326	#endif
		327
		328	#ifndef PAGESIZE
		329	# define PAGESIZE sysconf (_SC_PAGESIZE)
28	#endif	330	#endif
29		331
30	enum {	332	enum {
31	REQ_QUIT,	333	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	};	334	};
37		335
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;	336	typedef eio_req *aio_req;
		337	typedef eio_req *aio_req_ornot;
		338	typedef eio_wd aio_wd;
57		339
58	static int started;	340	static SV *on_next_submit;
59	static int nreqs;	341	static int next_pri = EIO_PRI_DEFAULT;
60	static int reqpipe[2], respipe[2];	342	static int max_outstanding;
61		343
62	static aio_req qs, qe; /* queue start, queue end */	344	static s_epipe respipe;
63		345
64	static void *aio_proc(void *arg);	346	static void req_destroy (aio_req req);
		347	static void req_cancel (aio_req req);
65		348
66	static void	349	static void
67	start_thread (void)	350	want_poll (void)
68	{	351	{
69	sigset_t fullsigset, oldsigset;	352	/* write a dummy byte to the pipe so fh becomes ready */
70	pthread_t tid;	353	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	}	354	}
85		355
86	static void	356	static void
87	send_reqs (void)	357	done_poll (void)
88	{	358	{
89	/* this write is atomic */	359	/* read any signals sent by the worker threads */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)	360	s_epipe_drain (&respipe);
		361	}
		362
		363	/* must be called at most once */
		364	static SV *
		365	req_sv (aio_req req, HV *stash)
		366	{
		367	if (!req->self)
91	{	368	{
92	qs = qs->next;	369	req->self = (SV *)newHV ();
93	if (!qs) qe = 0;	370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
94	}	371	}
		372
		373	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		374	}
		375
		376	static SV *
		377	newSVaio_wd (aio_wd wd)
		378	{
		379	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		380	}
		381
		382	static aio_req
		383	SvAIO_REQ (SV *sv)
		384	{
		385	MAGIC *mg;
		386
		387	if (!SvROK (sv)
		388	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		389	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		390	&& SvSTASH (SvRV (sv)) != aio_req_stash
		391	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		392	croak ("object of class IO::AIO::REQ expected");
		393
		394	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		395
		396	return mg ? (aio_req)mg->mg_ptr : 0;
		397	}
		398
		399	static aio_wd
		400	SvAIO_WD (SV *sv)
		401	{
		402	if (!SvROK (sv)
		403	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		404	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		405	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		406
		407	return (aio_wd)(long)SvIVX (SvRV (sv));
95	}	408	}
96		409
97	static void	410	static void
98	send_req (aio_req req)	411	aio_grp_feed (aio_req grp)
99	{	412	{
100	nreqs++;	413	if (grp->sv2 && SvOK (grp->sv2))
101	req->next = 0;
102
103	if (qe)
104	{	414	{
105	qe->next = req;	415	dSP;
106	qe = req;	416
		417	ENTER;
		418	SAVETMPS;
		419	PUSHMARK (SP);
		420	XPUSHs (req_sv (grp, aio_grp_stash));
		421	PUTBACK;
		422	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		423	SPAGAIN;
		424	FREETMPS;
		425	LEAVE;
107	}	426	}
108	else
109	qe = qs = req;
110
111	send_reqs ();
112	}	427	}
113		428
114	static void	429	static void
115	end_thread (void)	430	req_submit (eio_req *req)
116	{	431	{
117	aio_req req;	432	eio_submit (req);
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120		433
121	send_req (req);	434	if (expect_false (on_next_submit))
122	}
123
124	static void
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
133	SvUPGRADE (data, SVt_PV);
134	SvPOK_on (data);
135
136	if (dataoffset < 0)
137	dataoffset += svlen;
138
139	if (dataoffset < 0 || dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{	435	{
144	/* write: check length and adjust. */	436	dSP;
145	if (length < 0 || length + dataoffset > svlen)	437	SV *cb = sv_2mortal (on_next_submit);
146	length = svlen - dataoffset;	438
		439	on_next_submit = 0;
		440
		441	PUSHMARK (SP);
		442	PUTBACK;
		443	call_sv (cb, G_DISCARD | G_EVAL);
147	}	444	}
148	else	445	}
		446
		447	static int
		448	req_invoke (eio_req *req)
		449	{
		450	if (req->flags & FLAG_SV2_RO_OFF)
		451	SvREADONLY_off (req->sv2);
		452
		453	if (!EIO_CANCELLED (req) && req->callback)
149	{	454	{
150	/* read: grow scalar as necessary */
151	svptr = SvGROW (data, length + dataoffset);
152	}
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	}
172
173	static void
174	poll_wait ()
175	{
176	fd_set rfd;
177	FD_ZERO(&rfd);
178	FD_SET(respipe[0], &rfd);
179
180	select (respipe[0] + 1, &rfd, 0, 0, 0);
181	}
182
183	static int
184	poll_cb (pTHX)
185	{
186	dSP;	455	dSP;
187	int count = 0;	456	static SV *sv_result_cache; /* caches the result integer SV */
188	aio_req req;	457	SV *sv_result;
189		458
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	459	ENTER;
191	{	460	SAVETMPS;
192	nreqs--;	461	PUSHMARK (SP);
		462	EXTEND (SP, 1);
193		463
194	if (req->type == REQ_QUIT)	464	/* do not recreate the result IV from scratch each time */
195	started--;	465	if (expect_true (sv_result_cache))
		466	{
		467	sv_result = sv_result_cache; sv_result_cache = 0;
		468	SvIV_set (sv_result, req->result);
		469	SvIOK_only (sv_result);
		470	}
196	else	471	else
197	{	472	{
198	int errorno = errno;	473	sv_result = newSViv (req->result);
199	errno = req->errorno;	474	SvREADONLY_on (sv_result);
		475	}
200		476
201	if (req->type == REQ_READ)	477	switch (req->type)
202	SvCUR_set (req->data, req->dataoffset	478	{
203	+ req->result > 0 ? req->result : 0);	479	case EIO_WD_OPEN:
		480	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		481	break;
204		482
205	if (req->data)	483	case EIO_READDIR:
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209	{	484	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	485	SV *rv = &PL_sv_undef;
211	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);
213		486
214	Safefree (req->statdata);	487	if (req->result >= 0)
		488	{
		489	int i;
		490	char *names = (char *)req->ptr2;
		491	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		492	AV *av = newAV ();
		493
		494	av_extend (av, req->result - 1);
		495
		496	for (i = 0; i < req->result; ++i)
		497	{
		498	if (req->int1 & EIO_READDIR_DENTS)
		499	{
		500	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		501
		502	if (req->int1 & EIO_READDIR_CUSTOM2)
		503	{
		504	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		505	AV *avent = newAV ();
		506
		507	av_extend (avent, 2);
		508
		509	if (!sv_type [ent->type])
		510	{
		511	sv_type [ent->type] = newSViv (ent->type);
		512	SvREADONLY_on (sv_type [ent->type]);
		513	}
		514
		515	av_store (avent, 0, namesv);
		516	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		517	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		518
		519	av_store (av, i, newRV_noinc ((SV *)avent));
		520	}
		521	else
		522	av_store (av, i, namesv);
		523
		524	++ent;
		525	}
		526	else
		527	{
		528	SV *name = newSVpv (names, 0);
		529	av_store (av, i, name);
		530	names += SvCUR (name) + 1;
		531	}
		532	}
		533
		534	rv = sv_2mortal (newRV_noinc ((SV *)av));
		535	}
		536
		537	PUSHs (rv);
		538
		539	if (req->int1 & EIO_READDIR_CUSTOM1)
		540	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
215	}	541	}
		542	break;
216		543
217	PUSHMARK (SP);	544	case EIO_OPEN:
218	XPUSHs (sv_2mortal (newSViv (req->result)));
219
220	if (req->type == REQ_OPEN)
221	{	545	{
222	/* convert fd to fh */	546	/* convert fd to fh */
223	SV *fh;	547	SV *fh = &PL_sv_undef;
224		548
225	PUTBACK;	549	if (req->result >= 0)
226	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	550	{
227	SPAGAIN;	551	GV *gv = (GV *)sv_newmortal ();
		552	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		553	char sym [64];
		554	int symlen;
		555
		556	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		557	gv_init (gv, aio_stash, sym, symlen, 0);
228		558
229	fh = POPs;	559	symlen = snprintf (
		560	sym,
		561	sizeof (sym),
		562	"%s&=%d",
		563	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		564	(int)req->result
		565	);
230		566
231	PUSHMARK (SP);	567	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		568	fh = (SV *)gv;
		569	}
		570
232	XPUSHs (fh);	571	PUSHs (fh);
233	}	572	}
		573	break;
234		574
235	PUTBACK;	575	case EIO_STATVFS:
236	call_sv (req->callback, G_VOID | G_EVAL);	576	case EIO_FSTATVFS:
237	SPAGAIN;
238		577	{
239	if (req->callback)	578	SV *rv = &PL_sv_undef;
240	SvREFCNT_dec (req->callback);	579
		580	#ifndef _WIN32
		581	if (req->result >= 0)
		582	{
		583	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		584	HV *hv = newHV ();
241		585
242	errno = errorno;	586	rv = sv_2mortal (newRV_noinc ((SV *)hv));
243	count++;	587
		588	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		589	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		590	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		591	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		592	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		593	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		594	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		595	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		596	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		597	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		598	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		599	}
		600	#endif
		601
		602	PUSHs (rv);
244	}	603	}
245		604
246	Safefree (req);	605	break;
247	}
248		606
249	if (qs)	607	case EIO_GROUP:
250	send_reqs ();	608	req->int1 = 2; /* mark group as finished */
251		609
252	return count;	610	if (req->sv1)
253	}	611	{
		612	int i;
		613	AV *av = (AV *)req->sv1;
254		614
255	static void *	615	EXTEND (SP, AvFILL (av) + 1);
256	aio_proc (void *thr_arg)	616	for (i = 0; i <= AvFILL (av); ++i)
257	{	617	PUSHs (*av_fetch (av, i, 0));
258	aio_req req;	618	}
		619	break;
259		620
260	/* then loop */	621	case EIO_NOP:
261	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	622	case EIO_BUSY:
262	{	623	break;
263	errno = 0; /* strictly unnecessary */
264		624
265	switch (req->type)	625	case EIO_READLINK:
		626	case EIO_REALPATH:
		627	if (req->result > 0)
		628	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		629	break;
		630
		631	case EIO_STAT:
		632	case EIO_LSTAT:
		633	case EIO_FSTAT:
		634	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		635
		636	if (!(PL_laststatval = req->result))
		637	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		638	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		639
		640	PUSHs (sv_result);
		641	break;
		642
		643	case EIO_SEEK:
		644	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		645	break;
		646
		647	case EIO_READ:
266	{	648	{
267	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	649	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;	650	*SvEND (req->sv2) = 0;
269	#if SYS_readahead	651	SvPOK_only (req->sv2);
270	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	652	SvSETMAGIC (req->sv2);
271	#else	653	PUSHs (sv_result);
272	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;	654	}
273	#endif	655	break;
274		656
275	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	657	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;	658	if (req->result > 0)
277	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	659	SvIV_set (sv_result, 0);
278		660	/* 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		661
290	default:	662	default:
291	req->result = ENOSYS;	663	PUSHs (sv_result);
292	break;	664	break;
293	}	665	}
294		666
295	req->errorno = errno;	667	errno = req->errorno;
296	write (respipe[1], (void *)&req, sizeof (req));	668
		669	PUTBACK;
		670	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		671	SPAGAIN;
		672
		673	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		674	SvREFCNT_dec (sv_result);
		675	else
		676	sv_result_cache = sv_result;
		677
		678	FREETMPS;
		679	LEAVE;
		680
		681	PUTBACK;
297	}	682	}
298		683
		684	return !!SvTRUE (ERRSV);
		685	}
		686
		687	static void
		688	req_destroy (aio_req req)
		689	{
		690	if (req->self)
		691	{
		692	sv_unmagic (req->self, PERL_MAGIC_ext);
		693	SvREFCNT_dec (req->self);
		694	}
		695
		696	SvREFCNT_dec (req->sv1);
		697	SvREFCNT_dec (req->sv2);
		698	SvREFCNT_dec (req->sv3);
		699	SvREFCNT_dec (req->sv4);
		700	SvREFCNT_dec (req->callback);
		701
		702	free (req);
		703	}
		704
		705	static void
		706	req_cancel_subs (aio_req grp)
		707	{
		708	if (grp->type != EIO_GROUP)
		709	return;
		710
		711	SvREFCNT_dec (grp->sv2);
		712	grp->sv2 = 0;
		713
		714	eio_grp_cancel (grp);
		715	}
		716
		717	static void ecb_cold
		718	create_respipe (void)
		719	{
		720	if (s_epipe_renew (&respipe))
		721	croak ("IO::AIO: unable to initialize result pipe");
		722	}
		723
		724	static void
		725	poll_wait (void)
		726	{
		727	while (eio_nreqs ())
		728	{
		729	int size;
		730
		731	X_LOCK (reslock);
		732	size = res_queue.size;
		733	X_UNLOCK (reslock);
		734
		735	if (size)
		736	return;
		737
		738	etp_maybe_start_thread ();
		739
		740	s_epipe_wait (&respipe);
		741	}
		742	}
		743
		744	static int
		745	poll_cb (void)
		746	{
		747	for (;;)
		748	{
		749	int res = eio_poll ();
		750
		751	if (res > 0)
		752	croak (0);
		753
		754	if (!max_outstanding || max_outstanding > eio_nreqs ())
		755	return res;
		756
		757	poll_wait ();
		758	}
		759	}
		760
		761	static void ecb_cold
		762	reinit (void)
		763	{
		764	create_respipe ();
		765
		766	if (eio_init (want_poll, done_poll) < 0)
		767	croak ("IO::AIO: unable to initialise eio library");
		768	}
		769
		770	/*****************************************************************************/
		771
		772	#if !_POSIX_MAPPED_FILES
		773	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		774	# define munmap(addr,length) (errno = ENOSYS, -1)
		775	#endif
		776
		777	#if !_POSIX_MEMORY_PROTECTION
		778	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		779	# define PROT_NONE 0
		780	# define PROT_WRITE 0
		781	# define MAP_PRIVATE 0
		782	# define MAP_SHARED 0
		783	# define MAP_FIXED 0
		784	#endif
		785
		786	#define MMAP_MAGIC PERL_MAGIC_ext
		787
		788	static int ecb_cold
		789	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		790	{
		791	int old_errno = errno;
		792	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		793	errno = old_errno;
		794
		795	mg->mg_obj = 0; /* just in case */
		796
		797	SvREADONLY_off (sv);
		798
		799	if (SvPVX (sv) != mg->mg_ptr)
		800	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		801
		802	SvCUR_set (sv, 0);
		803	SvPVX (sv) = 0;
		804	SvOK_off (sv);
		805
299	return 0;	806	return 0;
300	}	807	}
301		808
		809	static MGVTBL mmap_vtbl = {
		810	0, 0, 0, 0, mmap_free
		811	};
		812
		813	/*****************************************************************************/
		814
		815	static SV *
		816	get_cb (SV *cb_sv)
		817	{
		818	SvGETMAGIC (cb_sv);
		819	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		820	}
		821
		822	static aio_req ecb_noinline
		823	dreq (SV *callback)
		824	{
		825	SV *cb_cv;
		826	aio_req req;
		827	int req_pri = next_pri;
		828	next_pri = EIO_PRI_DEFAULT;
		829
		830	cb_cv = get_cb (callback);
		831
		832	req = calloc (sizeof (*req), 1);
		833	if (!req)
		834	croak ("out of memory during eio_req allocation");
		835
		836	req->callback = SvREFCNT_inc (cb_cv);
		837	req->pri = req_pri;
		838
		839	return req;
		840	}
		841
		842	#define dREQ \
		843	aio_req req = dreq (callback); \
		844
		845	#define REQ_SEND \
		846	PUTBACK; \
		847	req_submit (req); \
		848	SPAGAIN; \
		849	\
		850	if (GIMME_V != G_VOID) \
		851	XPUSHs (req_sv (req, aio_req_stash));
		852
		853	ecb_inline void
		854	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		855	{
		856	if (expect_false (SvROK (path)))
		857	{
		858	SV *rv = SvRV (path);
		859	SV *wdob;
		860
		861	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		862	{
		863	path = AvARRAY (rv)[1];
		864	wdob = AvARRAY (rv)[0];
		865
		866	if (SvOK (wdob))
		867	{
		868	*wd = SvAIO_WD (wdob);
		869	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		870	}
		871	else
		872	*wd = EIO_INVALID_WD;
		873	}
		874	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		875	{
		876	*wd = (aio_wd)(long)SvIVX (rv);
		877	*wdsv = SvREFCNT_inc_NN (rv);
		878	*ptr = ".";
		879	return; /* path set to "." */
		880	}
		881	else
		882	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		883	}
		884
		885	*pathsv = newSVsv (path);
		886	*ptr = SvPVbyte_nolen (*pathsv);
		887	}
		888
		889	static void ecb_noinline
		890	req_set_path1 (aio_req req, SV *path)
		891	{
		892	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		893	}
		894
		895	static void ecb_noinline
		896	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		897	{
		898	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		899
		900	switch (SvTYPE (rv))
		901	{
		902	case SVt_PVIO:
		903	case SVt_PVLV:
		904	case SVt_PVGV:
		905	req->type = type_fh;
		906	req->sv1 = newSVsv (fh_or_path);
		907	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		908	break;
		909
		910	default:
		911	req->type = type_path;
		912	req_set_path1 (req, fh_or_path);
		913	break;
		914	}
		915	}
		916
		917	XS(boot_IO__AIO) ecb_cold;
		918
302	MODULE = IO::AIO PACKAGE = IO::AIO	919	MODULE = IO::AIO PACKAGE = IO::AIO
303		920
		921	PROTOTYPES: ENABLE
		922
304	BOOT:	923	BOOT:
305	{	924	{
306	if (pipe (reqpipe) || pipe (respipe))	925	static const struct {
307	croak ("unable to initialize request or result pipe");	926	const char *name;
		927	IV iv;
		928	} *civ, const_iv[] = {
		929	# define const_niv(name, value) { # name, (IV) value },
		930	# define const_iv(name) { # name, (IV) name },
		931	# define const_eio(name) { # name, (IV) EIO_ ## name },
		932	const_iv (EXDEV)
		933	const_iv (ENOSYS)
		934	const_iv (O_RDONLY)
		935	const_iv (O_WRONLY)
		936	const_iv (O_RDWR)
		937	const_iv (O_CREAT)
		938	const_iv (O_TRUNC)
		939	const_iv (O_EXCL)
		940	const_iv (O_APPEND)
308		941
309	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))	942	const_iv (O_ASYNC)
310	croak ("cannot set result pipe to nonblocking mode");	943	const_iv (O_DIRECT)
		944	const_iv (O_NOATIME)
311		945
312	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	946	const_iv (O_CLOEXEC)
313	croak ("cannot set result pipe to nonblocking mode");	947	const_iv (O_NOCTTY)
314	}	948	const_iv (O_NOFOLLOW)
		949	const_iv (O_NONBLOCK)
		950	const_iv (O_EXEC)
		951	const_iv (O_SEARCH)
		952	const_iv (O_DIRECTORY)
		953	const_iv (O_DSYNC)
		954	const_iv (O_RSYNC)
		955	const_iv (O_SYNC)
		956	const_iv (O_TTY_INIT)
315		957
		958	const_iv (S_IFIFO)
		959	const_iv (S_IFCHR)
		960	const_iv (S_IFBLK)
		961	const_iv (S_IFLNK)
		962	const_iv (S_IFREG)
		963	const_iv (S_IFDIR)
		964	const_iv (S_IFWHT)
		965	const_iv (S_IFSOCK)
		966	const_iv (S_IFMT)
		967
		968	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		969	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		970	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		971	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		972	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		973	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		974
		975	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		976	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		977	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		978	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		979	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		980
		981	const_iv (ST_RDONLY)
		982	const_iv (ST_NOSUID)
		983	const_iv (ST_NODEV)
		984	const_iv (ST_NOEXEC)
		985	const_iv (ST_SYNCHRONOUS)
		986	const_iv (ST_MANDLOCK)
		987	const_iv (ST_WRITE)
		988	const_iv (ST_APPEND)
		989	const_iv (ST_IMMUTABLE)
		990	const_iv (ST_NOATIME)
		991	const_iv (ST_NODIRATIME)
		992	const_iv (ST_RELATIME)
		993
		994	const_iv (PROT_NONE)
		995	const_iv (PROT_EXEC)
		996	const_iv (PROT_READ)
		997	const_iv (PROT_WRITE)
		998
		999	/*const_iv (MAP_FIXED)*/
		1000	const_iv (MAP_PRIVATE)
		1001	const_iv (MAP_SHARED)
		1002	const_iv (MAP_ANONYMOUS)
		1003
		1004	/* linuxish */
		1005	const_iv (MAP_HUGETLB)
		1006	const_iv (MAP_LOCKED)
		1007	const_iv (MAP_NORESERVE)
		1008	const_iv (MAP_POPULATE)
		1009	const_iv (MAP_NONBLOCK)
		1010
		1011	const_eio (SEEK_SET)
		1012	const_eio (SEEK_CUR)
		1013	const_eio (SEEK_END)
		1014
		1015	const_eio (MCL_FUTURE)
		1016	const_eio (MCL_CURRENT)
		1017
		1018	const_eio (MS_ASYNC)
		1019	const_eio (MS_INVALIDATE)
		1020	const_eio (MS_SYNC)
		1021
		1022	const_eio (MT_MODIFY)
		1023
		1024	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1025	const_eio (SYNC_FILE_RANGE_WRITE)
		1026	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1027
		1028	const_eio (FALLOC_FL_KEEP_SIZE)
		1029
		1030	const_eio (READDIR_DENTS)
		1031	const_eio (READDIR_DIRS_FIRST)
		1032	const_eio (READDIR_STAT_ORDER)
		1033	const_eio (READDIR_FOUND_UNKNOWN)
		1034
		1035	const_eio (DT_UNKNOWN)
		1036	const_eio (DT_FIFO)
		1037	const_eio (DT_CHR)
		1038	const_eio (DT_DIR)
		1039	const_eio (DT_BLK)
		1040	const_eio (DT_REG)
		1041	const_eio (DT_LNK)
		1042	const_eio (DT_SOCK)
		1043	const_eio (DT_WHT)
		1044	};
		1045
		1046	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1047	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1048	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1049	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1050
		1051	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1052	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1053
		1054	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1055
		1056	reinit ();
		1057	}
		1058
316	void	1059	void
317	min_parallel(nthreads)	1060	reinit ()
318	int nthreads	1061	PROTOTYPE:
		1062
		1063	void
		1064	max_poll_reqs (unsigned int nreqs)
319	PROTOTYPE: $	1065	PROTOTYPE: $
320	CODE:	1066	CODE:
321	while (nthreads > started)	1067	eio_set_max_poll_reqs (nreqs);
322	start_thread ();
323		1068
324	void	1069	void
325	max_parallel(nthreads)	1070	max_poll_time (double nseconds)
326	int nthreads
327	PROTOTYPE: $	1071	PROTOTYPE: $
328	CODE:	1072	CODE:
		1073	eio_set_max_poll_time (nseconds);
		1074
		1075	void
		1076	min_parallel (unsigned int nthreads)
		1077	PROTOTYPE: $
		1078	CODE:
		1079	eio_set_min_parallel (nthreads);
		1080
		1081	void
		1082	max_parallel (unsigned int nthreads)
		1083	PROTOTYPE: $
		1084	CODE:
		1085	eio_set_max_parallel (nthreads);
		1086
		1087	void
		1088	max_idle (unsigned int nthreads)
		1089	PROTOTYPE: $
		1090	CODE:
		1091	eio_set_max_idle (nthreads);
		1092
		1093	void
		1094	idle_timeout (unsigned int seconds)
		1095	PROTOTYPE: $
		1096	CODE:
		1097	eio_set_idle_timeout (seconds);
		1098
		1099	void
		1100	max_outstanding (unsigned int maxreqs)
		1101	PROTOTYPE: $
		1102	CODE:
		1103	max_outstanding = maxreqs;
		1104
		1105	void
		1106	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1107	PPCODE:
329	{	1108	{
330	int cur = started;	1109	dREQ;
331	while (cur > nthreads)	1110
332	{	1111	req->type = EIO_WD_OPEN;
333	end_thread ();	1112	req_set_path1 (req, pathname);
		1113
		1114	REQ_SEND;
		1115	}
		1116
		1117	void
		1118	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1119	PPCODE:
		1120	{
		1121	dREQ;
		1122
		1123	req->type = EIO_OPEN;
		1124	req_set_path1 (req, pathname);
		1125	req->int1 = flags;
		1126	req->int2 = mode;
		1127
		1128	REQ_SEND;
		1129	}
		1130
		1131	void
		1132	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1133	ALIAS:
		1134	aio_fsync = EIO_FSYNC
		1135	aio_fdatasync = EIO_FDATASYNC
		1136	aio_syncfs = EIO_SYNCFS
		1137	PPCODE:
		1138	{
		1139	int fd = s_fileno_croak (fh, 0);
		1140	dREQ;
		1141
		1142	req->type = ix;
		1143	req->sv1 = newSVsv (fh);
		1144	req->int1 = fd;
		1145
		1146	REQ_SEND;
		1147	}
		1148
		1149	void
		1150	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1151	PPCODE:
		1152	{
		1153	int fd = s_fileno_croak (fh, 0);
		1154	dREQ;
		1155
		1156	req->type = EIO_SYNC_FILE_RANGE;
		1157	req->sv1 = newSVsv (fh);
		1158	req->int1 = fd;
		1159	req->offs = offset;
		1160	req->size = nbytes;
		1161	req->int2 = flags;
		1162
		1163	REQ_SEND;
		1164	}
		1165
		1166	void
		1167	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1168	PPCODE:
		1169	{
		1170	int fd = s_fileno_croak (fh, 0);
		1171	dREQ;
		1172
		1173	req->type = EIO_FALLOCATE;
		1174	req->sv1 = newSVsv (fh);
		1175	req->int1 = fd;
		1176	req->int2 = mode;
		1177	req->offs = offset;
		1178	req->size = len;
		1179
		1180	REQ_SEND;
		1181	}
		1182
		1183	void
		1184	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1185	PPCODE:
		1186	{
		1187	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1188	int fd = s_fileno_croak (fh, 0);
		1189	dREQ;
		1190
		1191	if (expect_false (close_fd < 0))
		1192	{
		1193	int pipefd [2];
		1194
		1195	if (
		1196	#ifdef _WIN32
		1197	_pipe (pipefd, 1, _O_BINARY) < 0
		1198	#else
		1199	pipe (pipefd) < 0
		1200	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1201	#endif
		1202	|| close (pipefd [1]) < 0
334	cur--;	1203	)
		1204	abort (); /*D*/
		1205
		1206	close_fd = pipefd [0];
335	}	1207	}
336		1208
337	while (started > nthreads)	1209	req->type = EIO_DUP2;
		1210	req->int1 = close_fd;
		1211	req->sv2 = newSVsv (fh);
		1212	req->int2 = fd;
		1213
		1214	REQ_SEND;
		1215	}
		1216
		1217	void
		1218	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1219	PPCODE:
		1220	{
		1221	STRLEN svlen;
		1222	int fd = s_fileno_croak (fh, 0);
		1223	dREQ;
		1224
		1225	req->type = EIO_SEEK;
		1226	req->sv1 = newSVsv (fh);
		1227	req->int1 = fd;
		1228	req->offs = SvVAL64 (offset);
		1229	req->int2 = whence;
		1230
		1231	REQ_SEND;
		1232	}
		1233
		1234	void
		1235	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1236	ALIAS:
		1237	aio_read = EIO_READ
		1238	aio_write = EIO_WRITE
		1239	PPCODE:
		1240	{
		1241	STRLEN svlen;
		1242	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1243	char *svptr = SvPVbyte (data, svlen);
		1244	UV len = SvUV (length);
		1245
		1246	if (dataoffset < 0)
		1247	dataoffset += svlen;
		1248
		1249	if (dataoffset < 0 || dataoffset > svlen)
		1250	croak ("dataoffset outside of data scalar");
		1251
		1252	if (ix == EIO_WRITE)
338	{	1253	{
339	poll_wait ();	1254	/* write: check length and adjust. */
340	poll_cb (aTHX);	1255	if (!SvOK (length) || len + dataoffset > svlen)
341	}	1256	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	}	1257	}
474	else	1258	else
475	{	1259	{
476	req->type = REQ_FSTAT;	1260	/* read: check type and grow scalar as necessary */
477	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1261	SvUPGRADE (data, SVt_PV);
		1262	svptr = SvGROW (data, len + dataoffset + 1);
478	}	1263	}
479		1264
		1265	{
		1266	dREQ;
		1267
		1268	req->type = ix;
		1269	req->sv1 = newSVsv (fh);
		1270	req->int1 = fd;
		1271	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1272	req->size = len;
480	req->callback = SvREFCNT_inc (callback);	1273	req->sv2 = SvREFCNT_inc (data);
		1274	req->ptr2 = (char *)svptr + dataoffset;
		1275	req->stroffset = dataoffset;
481		1276
482	send_req (req);	1277	if (!SvREADONLY (data))
483	}	1278	{
		1279	SvREADONLY_on (data);
		1280	req->flags |= FLAG_SV2_RO_OFF;
		1281	}
484		1282
		1283	REQ_SEND;
		1284	}
		1285	}
		1286
485	void	1287	void
486	aio_unlink(pathname,callback)	1288	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
487	SV * pathname	1289	ALIAS:
488	SV * callback	1290	aio_readlink = EIO_READLINK
489	PROTOTYPE: $$	1291	aio_realpath = EIO_REALPATH
		1292	PPCODE:
		1293	{
		1294	dREQ;
		1295
		1296	req->type = ix;
		1297	req_set_path1 (req, pathname);
		1298
		1299	REQ_SEND;
		1300	}
		1301
		1302	void
		1303	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1304	PPCODE:
		1305	{
		1306	int ifd = s_fileno_croak (in_fh , 0);
		1307	int ofd = s_fileno_croak (out_fh, 1);
		1308	dREQ;
		1309
		1310	req->type = EIO_SENDFILE;
		1311	req->sv1 = newSVsv (out_fh);
		1312	req->int1 = ofd;
		1313	req->sv2 = newSVsv (in_fh);
		1314	req->int2 = ifd;
		1315	req->offs = in_offset;
		1316	req->size = length;
		1317
		1318	REQ_SEND;
		1319	}
		1320
		1321	void
		1322	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1323	PPCODE:
		1324	{
		1325	int fd = s_fileno_croak (fh, 0);
		1326	dREQ;
		1327
		1328	req->type = EIO_READAHEAD;
		1329	req->sv1 = newSVsv (fh);
		1330	req->int1 = fd;
		1331	req->offs = offset;
		1332	req->size = length;
		1333
		1334	REQ_SEND;
		1335	}
		1336
		1337	void
		1338	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1339	ALIAS:
		1340	aio_stat = EIO_STAT
		1341	aio_lstat = EIO_LSTAT
		1342	aio_statvfs = EIO_STATVFS
		1343	PPCODE:
		1344	{
		1345	dREQ;
		1346
		1347	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1348
		1349	REQ_SEND;
		1350	}
		1351
		1352	UV
		1353	major (UV dev)
		1354	ALIAS:
		1355	minor = 1
490	CODE:	1356	CODE:
		1357	RETVAL = ix ? major (dev) : minor (dev);
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	UV
		1362	makedev (UV maj, UV min)
		1363	CODE:
		1364	RETVAL = makedev (maj, min);
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	void
		1369	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1370	PPCODE:
491	{	1371	{
492	aio_req req;	1372	dREQ;
		1373
		1374	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1375	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1376	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1377
		1378	REQ_SEND;
		1379	}
		1380
		1381	void
		1382	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1383	PPCODE:
		1384	{
		1385	dREQ;
		1386
		1387	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1388	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->int2 = mode;
		1400	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1401
		1402	REQ_SEND;
		1403	}
		1404
		1405	void
		1406	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1407	PPCODE:
		1408	{
		1409	dREQ;
		1410
		1411	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1412	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1413	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1414
		1415	REQ_SEND;
		1416	}
		1417
		1418	void
		1419	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	dREQ;
493		1423
494	Newz (0, req, 1, aio_cb);	1424	req->type = EIO_READDIR;
		1425	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1426
		1427	if (flags & EIO_READDIR_DENTS)
		1428	req->int1 |= EIO_READDIR_CUSTOM2;
		1429
		1430	req_set_path1 (req, pathname);
		1431
		1432	REQ_SEND;
		1433	}
		1434
		1435	void
		1436	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1437	PPCODE:
		1438	{
		1439	dREQ;
		1440
		1441	req->type = EIO_MKDIR;
		1442	req->int2 = mode;
		1443	req_set_path1 (req, pathname);
		1444
		1445	REQ_SEND;
		1446	}
		1447
		1448	void
		1449	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1450	ALIAS:
		1451	aio_unlink = EIO_UNLINK
		1452	aio_rmdir = EIO_RMDIR
		1453	aio_readdir = EIO_READDIR
		1454	PPCODE:
		1455	{
		1456	dREQ;
495		1457
496	if (!req)	1458	req->type = ix;
497	croak ("out of memory during aio_req allocation");	1459	req_set_path1 (req, pathname);
		1460
		1461	REQ_SEND;
		1462	}
		1463
		1464	void
		1465	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1466	ALIAS:
		1467	aio_link = EIO_LINK
		1468	aio_symlink = EIO_SYMLINK
		1469	aio_rename = EIO_RENAME
		1470	PPCODE:
		1471	{
		1472	eio_wd wd2 = 0;
		1473	dREQ;
498		1474
499	req->type = REQ_UNLINK;	1475	req->type = ix;
500	req->data = newSVsv (pathname);	1476	req_set_path1 (req, oldpath);
501	req->dataptr = SvPV_nolen (req->data);	1477	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
502	req->callback = SvREFCNT_inc (callback);	1478	req->int3 = (long)wd2;
503		1479
504	send_req (req);	1480	REQ_SEND;
		1481	}
		1482
		1483	void
		1484	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1485	PPCODE:
		1486	{
		1487	dREQ;
		1488
		1489	req->type = EIO_MKNOD;
		1490	req->int2 = (mode_t)mode;
		1491	req->offs = dev;
		1492	req_set_path1 (req, pathname);
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	void
		1498	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1499	ALIAS:
		1500	aio_mtouch = EIO_MTOUCH
		1501	aio_msync = EIO_MSYNC
		1502	PPCODE:
		1503	{
		1504	STRLEN svlen;
		1505	char *svptr = SvPVbyte (data, svlen);
		1506	UV len = SvUV (length);
		1507
		1508	if (offset < 0)
		1509	offset += svlen;
		1510
		1511	if (offset < 0 || offset > svlen)
		1512	croak ("offset outside of scalar");
		1513
		1514	if (!SvOK (length) || len + offset > svlen)
		1515	len = svlen - offset;
		1516
		1517	{
		1518	dREQ;
		1519
		1520	req->type = ix;
		1521	req->sv2 = SvREFCNT_inc (data);
		1522	req->ptr2 = (char *)svptr + offset;
		1523	req->size = len;
		1524	req->int1 = flags;
		1525
		1526	REQ_SEND;
		1527	}
		1528	}
		1529
		1530	void
		1531	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1532	PPCODE:
		1533	{
		1534	STRLEN svlen;
		1535	char *svptr = SvPVbyte (data, svlen);
		1536	UV len = SvUV (length);
		1537
		1538	if (offset < 0)
		1539	offset += svlen;
		1540
		1541	if (offset < 0 || offset > svlen)
		1542	croak ("offset outside of scalar");
		1543
		1544	if (!SvOK (length) || len + offset > svlen)
		1545	len = svlen - offset;
		1546
		1547	{
		1548	dREQ;
		1549
		1550	req->type = EIO_MLOCK;
		1551	req->sv2 = SvREFCNT_inc (data);
		1552	req->ptr2 = (char *)svptr + offset;
		1553	req->size = len;
		1554
		1555	REQ_SEND;
		1556	}
		1557	}
		1558
		1559	void
		1560	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1561	PPCODE:
		1562	{
		1563	dREQ;
		1564
		1565	req->type = EIO_MLOCKALL;
		1566	req->int1 = flags;
		1567
		1568	REQ_SEND;
		1569	}
		1570
		1571	void
		1572	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1573	PPCODE:
		1574	{
		1575	dREQ;
		1576
		1577	req->type = EIO_BUSY;
		1578	req->nv1 = delay < 0. ? 0. : delay;
		1579
		1580	REQ_SEND;
		1581	}
		1582
		1583	void
		1584	aio_group (SV *callback=&PL_sv_undef)
		1585	PPCODE:
		1586	{
		1587	dREQ;
		1588
		1589	req->type = EIO_GROUP;
		1590
		1591	req_submit (req);
		1592	XPUSHs (req_sv (req, aio_grp_stash));
		1593	}
		1594
		1595	void
		1596	aio_nop (SV *callback=&PL_sv_undef)
		1597	ALIAS:
		1598	aio_nop = EIO_NOP
		1599	aio_sync = EIO_SYNC
		1600	PPCODE:
		1601	{
		1602	dREQ;
		1603
		1604	req->type = ix;
		1605
		1606	REQ_SEND;
505	}	1607	}
506		1608
507	int	1609	int
		1610	aioreq_pri (int pri = 0)
		1611	CODE:
		1612	RETVAL = next_pri;
		1613	if (items > 0)
		1614	{
		1615	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1616	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1617	next_pri = pri;
		1618	}
		1619	OUTPUT:
		1620	RETVAL
		1621
		1622	void
		1623	aioreq_nice (int nice = 0)
		1624	CODE:
		1625	nice = next_pri - nice;
		1626	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1627	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1628	next_pri = nice;
		1629
		1630	void
		1631	flush ()
		1632	CODE:
		1633	while (eio_nreqs ())
		1634	{
		1635	poll_wait ();
		1636	poll_cb ();
		1637	}
		1638
		1639	int
		1640	poll ()
		1641	CODE:
		1642	poll_wait ();
		1643	RETVAL = poll_cb ();
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	int
508	poll_fileno()	1648	poll_fileno ()
		1649	CODE:
		1650	RETVAL = s_epipe_fd (&respipe);
		1651	OUTPUT:
		1652	RETVAL
		1653
		1654	int
		1655	poll_cb (...)
509	PROTOTYPE:	1656	PROTOTYPE:
510	CODE:	1657	CODE:
511	RETVAL = respipe[0];	1658	RETVAL = poll_cb ();
512	OUTPUT:	1659	OUTPUT:
513	RETVAL	1660	RETVAL
514		1661
		1662	void
		1663	poll_wait ()
		1664	CODE:
		1665	poll_wait ();
		1666
515	int	1667	int
516	poll_cb(...)	1668	nreqs ()
517	PROTOTYPE:
518	CODE:	1669	CODE:
519	RETVAL = poll_cb (aTHX);	1670	RETVAL = eio_nreqs ();
520	OUTPUT:	1671	OUTPUT:
521	RETVAL	1672	RETVAL
522		1673
523	void	1674	int
524	poll_wait()	1675	nready ()
525	PROTOTYPE:
526	CODE:	1676	CODE:
527	poll_wait ();
528
529	int
530	nreqs()
531	PROTOTYPE:
532	CODE:
533	RETVAL = nreqs;	1677	RETVAL = eio_nready ();
534	OUTPUT:	1678	OUTPUT:
535	RETVAL	1679	RETVAL
536		1680
		1681	int
		1682	npending ()
		1683	CODE:
		1684	RETVAL = eio_npending ();
		1685	OUTPUT:
		1686	RETVAL
		1687
		1688	int
		1689	nthreads ()
		1690	CODE:
		1691	RETVAL = eio_nthreads ();
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	int
		1696	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1697	CODE:
		1698	RETVAL = posix_fadvise (fh, offset, length, advice);
		1699	OUTPUT:
		1700	RETVAL
		1701
		1702	IV
		1703	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1704	CODE:
		1705	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1706	OUTPUT:
		1707	RETVAL
		1708
		1709	void
		1710	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1711	PPCODE:
		1712	sv_unmagic (scalar, MMAP_MAGIC);
		1713	{
		1714	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1715	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1716	if (addr == (void *)-1)
		1717	XSRETURN_NO;
		1718
		1719	sv_force_normal (scalar);
		1720
		1721	/* we store the length in mg_obj, as namlen is I32 :/ */
		1722	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1723	->mg_obj = (SV *)length;
		1724
		1725	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1726
		1727	if (!(prot & PROT_WRITE))
		1728	SvREADONLY_on (scalar);
		1729
		1730	if (SvLEN (scalar))
		1731	Safefree (SvPVX (scalar));
		1732
		1733	SvPVX (scalar) = (char *)addr;
		1734	SvCUR_set (scalar, length);
		1735	SvLEN_set (scalar, 0);
		1736	SvPOK_only (scalar);
		1737
		1738	XSRETURN_YES;
		1739	}
		1740
		1741	void
		1742	munmap (SV *scalar)
		1743	CODE:
		1744	sv_unmagic (scalar, MMAP_MAGIC);
		1745
		1746	int
		1747	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1748	ALIAS:
		1749	mprotect = 1
		1750	CODE:
		1751	{
		1752	STRLEN svlen;
		1753	void *addr = SvPVbyte (scalar, svlen);
		1754	size_t len = SvUV (length);
		1755
		1756	if (offset < 0)
		1757	offset += svlen;
		1758
		1759	if (offset < 0 || offset > svlen)
		1760	croak ("offset outside of scalar");
		1761
		1762	if (!SvOK (length) || len + offset > svlen)
		1763	len = svlen - offset;
		1764
		1765	addr = (void *)(((intptr_t)addr) + offset);
		1766	eio_page_align (&addr, &len);
		1767
		1768	switch (ix)
		1769	{
		1770	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1771	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1772	}
		1773	}
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	int
		1778	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1779	CODE:
		1780	{
		1781	STRLEN svlen;
		1782	void *addr = SvPVbyte (scalar, svlen);
		1783	size_t len = SvUV (length);
		1784
		1785	if (offset < 0)
		1786	offset += svlen;
		1787
		1788	if (offset < 0 || offset > svlen)
		1789	croak ("offset outside of scalar");
		1790
		1791	if (!SvOK (length) || len + offset > svlen)
		1792	len = svlen - offset;
		1793
		1794	addr = (void *)(((intptr_t)addr) + offset);
		1795	eio_page_align (&addr, &len);
		1796	#if _POSIX_MEMLOCK_RANGE
		1797	RETVAL = munlock (addr, len);
		1798	#else
		1799	RETVAL = ((errno = ENOSYS), -1);
		1800	#endif
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805	int
		1806	munlockall ()
		1807	CODE:
		1808	#if _POSIX_MEMLOCK
		1809	munlockall ();
		1810	#else
		1811	RETVAL = -1;
		1812	errno = ENOSYS;
		1813	#endif
		1814	OUTPUT:
		1815	RETVAL
		1816
		1817	void _on_next_submit (SV *cb)
		1818	CODE:
		1819	SvREFCNT_dec (on_next_submit);
		1820	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1821
		1822	PROTOTYPES: DISABLE
		1823
		1824	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1825
		1826	BOOT:
		1827	{
		1828	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1829	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1830	}
		1831
		1832	void
		1833	DESTROY (SV *self)
		1834	CODE:
		1835	{
		1836	aio_wd wd = SvAIO_WD (self);
		1837	#if HAVE_AT
		1838	{
		1839	SV *callback = &PL_sv_undef;
		1840	dREQ; /* clobbers next_pri :/ */
		1841	next_pri = req->pri; /* restore next_pri */
		1842	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1843	req->type = EIO_WD_CLOSE;
		1844	req->wd = wd;
		1845	REQ_SEND;
		1846	}
		1847	#else
		1848	eio_wd_close_sync (wd);
		1849	#endif
		1850	}
		1851
		1852	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1853
		1854	void
		1855	cancel (aio_req_ornot req)
		1856	CODE:
		1857	eio_cancel (req);
		1858
		1859	void
		1860	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1861	PPCODE:
		1862	{
		1863	if (GIMME_V != G_VOID)
		1864	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1865
		1866	if (items > 1)
		1867	{
		1868	SV *cb_cv =get_cb (callback);
		1869
		1870	SvREFCNT_dec (req->callback);
		1871	req->callback = SvREFCNT_inc (cb_cv);
		1872	}
		1873	}
		1874
		1875	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1876
		1877	void
		1878	add (aio_req grp, ...)
		1879	PPCODE:
		1880	{
		1881	int i;
		1882
		1883	if (grp->int1 == 2)
		1884	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1885
		1886	for (i = 1; i < items; ++i )
		1887	{
		1888	aio_req req;
		1889
		1890	if (GIMME_V != G_VOID)
		1891	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1892
		1893	req = SvAIO_REQ (ST (i));
		1894
		1895	if (req)
		1896	eio_grp_add (grp, req);
		1897	}
		1898	}
		1899
		1900	void
		1901	cancel_subs (aio_req_ornot req)
		1902	CODE:
		1903	req_cancel_subs (req);
		1904
		1905	void
		1906	result (aio_req grp, ...)
		1907	CODE:
		1908	{
		1909	int i;
		1910	AV *av;
		1911
		1912	grp->errorno = errno;
		1913
		1914	av = newAV ();
		1915	av_extend (av, items - 1);
		1916
		1917	for (i = 1; i < items; ++i )
		1918	av_push (av, newSVsv (ST (i)));
		1919
		1920	SvREFCNT_dec (grp->sv1);
		1921	grp->sv1 = (SV *)av;
		1922	}
		1923
		1924	void
		1925	errno (aio_req grp, int errorno = errno)
		1926	CODE:
		1927	grp->errorno = errorno;
		1928
		1929	void
		1930	limit (aio_req grp, int limit)
		1931	CODE:
		1932	eio_grp_limit (grp, limit);
		1933
		1934	void
		1935	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1936	CODE:
		1937	{
		1938	SvREFCNT_dec (grp->sv2);
		1939	grp->sv2 = newSVsv (callback);
		1940	grp->feed = aio_grp_feed;
		1941
		1942	if (grp->int2 <= 0)
		1943	grp->int2 = 2;
		1944
		1945	eio_grp_limit (grp, grp->int2);
		1946	}
		1947

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