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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.181 by root, Tue Feb 15 03:21:41 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>
		16	#include <sys/statvfs.h>
9	#include <unistd.h>	17	#include <limits.h>
10	#include <fcntl.h>	18	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	19	#include <sched.h>
13	#include <endian.h>
14		20
15	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
16	#include <sys/syscall.h>	22	# include <sys/mman.h>
		23	#endif
17		24
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		27
22	#if __i386 || __amd64	28	#ifdef _WIN32
23	# define STACKSIZE ( 256 * sizeof (long))	29
24	#elif __ia64	30	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE (8192 * sizeof (long))	31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
26	#else	66	#else
27	# define STACKSIZE ( 512 * sizeof (long))	67
		68	# include <sys/time.h>
		69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	#ifndef POSIX_FADV_NORMAL
		127	# define POSIX_FADV_NORMAL 0
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if !HAVE_POSIX_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	#endif
		152	#ifndef POSIX_MADV_SEQUENTIAL
		153	# define POSIX_MADV_SEQUENTIAL 0
		154	#endif
		155	#ifndef POSIX_MADV_RANDOM
		156	# define POSIX_MADV_RANDOM 0
		157	#endif
		158	#ifndef POSIX_MADV_WILLNEED
		159	# define POSIX_MADV_WILLNEED 0
		160	#endif
		161	#ifndef POSIX_MADV_DONTNEED
		162	# define POSIX_MADV_DONTNEED 0
		163	#endif
		164
		165	#if !HAVE_POSIX_MADVISE
		166	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		167	#endif
		168
		169	#ifndef PROT_NONE
		170	# define PROT_NONE 0
		171	#endif
		172	#ifndef PROT_READ
		173	# define PROT_READ 0
		174	#endif
		175	#ifndef PROT_WRITE
		176	# define PROT_READ 0
		177	#endif
		178	#ifndef PROT_EXEC
		179	# define PROT_EXEC 0
		180	#endif
		181
		182	#ifndef ST_NODEV
		183	# define ST_NODEV 0
		184	#endif
		185	#ifndef ST_NOEXEC
		186	# define ST_NOEXEC 0
		187	#endif
		188	#ifndef ST_SYNCHRONOUS
		189	# define ST_SYNCHRONOUS 0
		190	#endif
		191	#ifndef ST_MANDLOCK
		192	# define ST_MANDLOCK 0
		193	#endif
		194	#ifndef ST_WRITE
		195	# define ST_WRITE 0
		196	#endif
		197	#ifndef ST_APPEND
		198	# define ST_APPEND 0
		199	#endif
		200	#ifndef ST_IMMUTABLE
		201	# define ST_IMMUTABLE 0
		202	#endif
		203	#ifndef ST_NOATIME
		204	# define ST_NOATIME 0
		205	#endif
		206	#ifndef ST_NODIRATIME
		207	# define ST_NODIRATIME 0
		208	#endif
		209	#ifndef ST_RELATIME
		210	# define ST_RELATIME 0
		211	#endif
		212
		213	#ifndef S_IFIFO
		214	# define S_IFIFO 0
		215	#endif
		216	#ifndef S_IFCHR
		217	# define S_IFCHR 0
		218	#endif
		219	#ifndef S_IFBLK
		220	# define S_IFBLK 0
		221	#endif
		222	#ifndef S_IFLNK
		223	# define S_IFLNK 0
		224	#endif
		225	#ifndef S_IFREG
		226	# define S_IFREG 0
		227	#endif
		228	#ifndef S_IFDIR
		229	# define S_IFDIR 0
		230	#endif
		231	#ifndef S_IFWHT
		232	# define S_IFWHT 0
		233	#endif
		234	#ifndef S_IFSOCK
		235	# define S_IFSOCK 0
		236	#endif
		237
		238	#ifndef MAP_ANONYMOUS
		239	# ifdef MAP_ANON
		240	# define MAP_ANONYMOUS MAP_ANON
		241	# else
		242	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	243	# endif
		244	#endif
		245	#ifndef MAP_HUGETLB
		246	# define MAP_HUGETLB 0
		247	#endif
		248	#ifndef MAP_LOCKED
		249	# define MAP_LOCKED 0
		250	#endif
		251	#ifndef MAP_NORESERVE
		252	# define MAP_NORESERVE 0
		253	#endif
		254	#ifndef MAP_POPULATE
		255	# define MAP_POPULATE 0
		256	#endif
		257	#ifndef MAP_NONBLOCK
		258	# define MAP_NONBLOCK 0
		259	#endif
		260
		261	#ifndef makedev
		262	# define makedev(maj,min) (((maj) << 8) | (min))
		263	#endif
		264	#ifndef major
		265	# define major(dev) ((dev) >> 8)
		266	#endif
		267	#ifndef minor
		268	# define minor(dev) ((dev) & 0xff)
		269	#endif
		270
		271	#ifndef PAGESIZE
		272	# define PAGESIZE sysconf (_SC_PAGESIZE)
		273	#endif
		274
		275	static int req_invoke (eio_req *req);
		276	#define EIO_FINISH(req) req_invoke (req)
		277	static void req_destroy (eio_req *grp);
		278	#define EIO_DESTROY(req) req_destroy (req)
29		279
30	enum {	280	enum {
31	REQ_QUIT,	281	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	};	282	};
37		283
38	typedef struct aio_cb {	284	#include "libeio/eio.c"
39	struct aio_cb *next;
40		285
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;	286	typedef eio_req *aio_req;
		287	typedef eio_req *aio_req_ornot;
57		288
58	static int started;	289	static SV *on_next_submit;
59	static int nreqs;	290	static int next_pri = EIO_PRI_DEFAULT;
60	static int reqpipe[2], respipe[2];	291	static int max_outstanding;
61		292
62	static aio_req qs, qe; /* queue start, queue end */	293	static s_epipe respipe;
63		294
64	static void *aio_proc(void *arg);	295	static void req_destroy (aio_req req);
		296	static void req_cancel (aio_req req);
65		297
66	static void	298	static void want_poll (void)
67	start_thread (void)
68	{	299	{
69	sigset_t fullsigset, oldsigset;	300	/* write a dummy byte to the pipe so fh becomes ready */
70	pthread_t tid;	301	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	}	302	}
85		303
86	static void	304	static void done_poll (void)
87	send_reqs (void)
88	{	305	{
89	/* this write is atomic */	306	/* read any signals sent by the worker threads */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)	307	s_epipe_drain (&respipe);
91	{
92	qs = qs->next;
93	if (!qs) qe = 0;
94	}
95	}	308	}
96		309
97	static void	310	/* must be called at most once */
98	send_req (aio_req req)	311	static SV *req_sv (aio_req req, HV *stash)
99	{	312	{
100	nreqs++;	313	if (!req->self)
101	req->next = 0;
102
103	if (qe)
104	{	314	{
105	qe->next = req;	315	req->self = (SV *)newHV ();
106	qe = req;	316	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
107	}	317	}
108	else
109	qe = qs = req;
110		318
111	send_reqs ();	319	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
112	}	320	}
113		321
114	static void	322	static aio_req SvAIO_REQ (SV *sv)
115	end_thread (void)
116	{	323	{
117	aio_req req;	324	MAGIC *mg;
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120		325
121	send_req (req);	326	if (!SvROK (sv)
122	}	327	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		328	&& SvSTASH (SvRV (sv)) != aio_req_stash
		329	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		330	croak ("object of class IO::AIO::REQ expected");
123		331
124	static void	332	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		333
133	SvUPGRADE (data, SVt_PV);	334	return mg ? (aio_req)mg->mg_ptr : 0;
134	SvPOK_on (data);	335	}
135		336
136	if (dataoffset < 0)	337	static void aio_grp_feed (aio_req grp)
137	dataoffset += svlen;	338	{
138		339	if (grp->sv2 && SvOK (grp->sv2))
139	if (dataoffset < 0 || dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{	340	{
144	/* write: check length and adjust. */	341	dSP;
145	if (length < 0 || length + dataoffset > svlen)	342
146	length = svlen - dataoffset;	343	ENTER;
		344	SAVETMPS;
		345	PUSHMARK (SP);
		346	XPUSHs (req_sv (grp, aio_grp_stash));
		347	PUTBACK;
		348	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		349	SPAGAIN;
		350	FREETMPS;
		351	LEAVE;
147	}	352	}
148	else	353	}
		354
		355	static void req_submit (eio_req *req)
		356	{
		357	eio_submit (req);
		358
		359	if (expect_false (on_next_submit))
149	{	360	{
150	/* read: grow scalar as necessary */	361	dSP;
151	svptr = SvGROW (data, length + dataoffset);	362	SV *cb = sv_2mortal (on_next_submit);
		363
		364	on_next_submit = 0;
		365
		366	PUSHMARK (SP);
		367	PUTBACK;
		368	call_sv (cb, G_DISCARD | G_EVAL);
152	}	369	}
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	}	370	}
172		371
173	static void	372	static int req_invoke (eio_req *req)
174	poll_wait ()
175	{	373	{
176	fd_set rfd;	374	if (req->flags & FLAG_SV2_RO_OFF)
177	FD_ZERO(&rfd);	375	SvREADONLY_off (req->sv2);
178	FD_SET(respipe[0], &rfd);
179		376
180	select (respipe[0] + 1, &rfd, 0, 0, 0);	377	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	{	378	{
192	nreqs--;	379	dSP;
		380	static SV *sv_result_cache; /* caches the result integer SV */
		381	SV *sv_result;
193		382
194	if (req->type == REQ_QUIT)	383	ENTER;
195	started--;	384	SAVETMPS;
		385	PUSHMARK (SP);
		386	EXTEND (SP, 1);
		387
		388	/* do not recreate the result IV from scratch each time */
		389	if (expect_true (sv_result_cache))
		390	{
		391	sv_result = sv_result_cache; sv_result_cache = 0;
		392	SvIV_set (sv_result, req->result);
		393	SvIOK_only (sv_result);
		394	}
196	else	395	else
197	{	396	{
198	int errorno = errno;	397	sv_result = newSViv (req->result);
199	errno = req->errorno;	398	SvREADONLY_on (sv_result);
		399	}
200		400
201	if (req->type == REQ_READ)	401	switch (req->type)
202	SvCUR_set (req->data, req->dataoffset	402	{
203	+ req->result > 0 ? req->result : 0);	403	case EIO_READDIR:
204
205	if (req->data)
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209	{	404	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	405	SV *rv = &PL_sv_undef;
211	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);
213		406
214	Safefree (req->statdata);	407	if (req->result >= 0)
		408	{
		409	int i;
		410	char *names = (char *)req->ptr2;
		411	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		412	AV *av = newAV ();
		413
		414	av_extend (av, req->result - 1);
		415
		416	for (i = 0; i < req->result; ++i)
		417	{
		418	if (req->int1 & EIO_READDIR_DENTS)
		419	{
		420	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		421
		422	if (req->int1 & EIO_READDIR_CUSTOM2)
		423	{
		424	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		425	AV *avent = newAV ();
		426
		427	av_extend (avent, 2);
		428
		429	if (!sv_type [ent->type])
		430	{
		431	sv_type [ent->type] = newSViv (ent->type);
		432	SvREADONLY_on (sv_type [ent->type]);
		433	}
		434
		435	av_store (avent, 0, namesv);
		436	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		437	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		438
		439	av_store (av, i, newRV_noinc ((SV *)avent));
		440	}
		441	else
		442	av_store (av, i, namesv);
		443
		444	++ent;
		445	}
		446	else
		447	{
		448	SV *name = newSVpv (names, 0);
		449	av_store (av, i, name);
		450	names += SvCUR (name) + 1;
		451	}
		452	}
		453
		454	rv = sv_2mortal (newRV_noinc ((SV *)av));
		455	}
		456
		457	PUSHs (rv);
		458
		459	if (req->int1 & EIO_READDIR_CUSTOM1)
		460	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
215	}	461	}
		462	break;
216		463
217	PUSHMARK (SP);	464	case EIO_OPEN:
218	XPUSHs (sv_2mortal (newSViv (req->result)));
219
220	if (req->type == REQ_OPEN)
221	{	465	{
222	/* convert fd to fh */	466	/* convert fd to fh */
223	SV *fh;	467	SV *fh = &PL_sv_undef;
224		468
225	PUTBACK;	469	if (req->result >= 0)
226	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	470	{
227	SPAGAIN;	471	GV *gv = (GV *)sv_newmortal ();
		472	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		473	char sym [64];
		474	int symlen;
		475
		476	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		477	gv_init (gv, aio_stash, sym, symlen, 0);
228		478
229	fh = POPs;	479	symlen = snprintf (
		480	sym,
		481	sizeof (sym),
		482	"%s&=%d",
		483	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		484	(int)req->result
		485	);
230		486
231	PUSHMARK (SP);	487	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		488	fh = (SV *)gv;
		489	}
		490
232	XPUSHs (fh);	491	PUSHs (fh);
233	}	492	}
		493	break;
234		494
235	PUTBACK;	495	case EIO_STATVFS:
236	call_sv (req->callback, G_VOID | G_EVAL);	496	case EIO_FSTATVFS:
237	SPAGAIN;
238		497	{
239	if (req->callback)	498	SV *rv = &PL_sv_undef;
240	SvREFCNT_dec (req->callback);	499
		500	if (req->result >= 0)
		501	{
		502	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		503	HV *hv = newHV ();
241		504
242	errno = errorno;	505	rv = sv_2mortal (newRV_noinc ((SV *)hv));
243	count++;	506
		507	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		508	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		509	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		510	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		511	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		512	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		513	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		514	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		515	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		516	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		517	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		518	}
		519
		520	PUSHs (rv);
244	}	521	}
245		522
246	Safefree (req);	523	break;
247	}
248		524
249	if (qs)	525	case EIO_GROUP:
250	send_reqs ();	526	req->int1 = 2; /* mark group as finished */
251		527
252	return count;	528	if (req->sv1)
253	}	529	{
		530	int i;
		531	AV *av = (AV *)req->sv1;
254		532
255	static void *	533	EXTEND (SP, AvFILL (av) + 1);
256	aio_proc (void *thr_arg)	534	for (i = 0; i <= AvFILL (av); ++i)
257	{	535	PUSHs (*av_fetch (av, i, 0));
258	aio_req req;	536	}
		537	break;
259		538
260	/* then loop */	539	case EIO_NOP:
261	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	540	case EIO_BUSY:
262	{	541	break;
263	errno = 0; /* strictly unnecessary */
264		542
265	switch (req->type)	543	case EIO_READLINK:
		544	if (req->result > 0)
		545	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		546	break;
		547
		548	case EIO_STAT:
		549	case EIO_LSTAT:
		550	case EIO_FSTAT:
		551	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		552	PL_laststatval = req->result;
		553	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		554	PUSHs (sv_result);
		555	break;
		556
		557	case EIO_READ:
266	{	558	{
267	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	559	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;	560	*SvEND (req->sv2) = 0;
269	#if SYS_readahead	561	SvPOK_only (req->sv2);
270	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	562	SvSETMAGIC (req->sv2);
271	#else	563	PUSHs (sv_result);
272	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;	564	}
273	#endif	565	break;
274		566
275	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	567	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;	568	if (req->result > 0)
277	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	569	SvIV_set (sv_result, 0);
278		570	/* 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		571
290	default:	572	default:
291	req->result = ENOSYS;	573	PUSHs (sv_result);
292	break;	574	break;
293	}	575	}
294		576
295	req->errorno = errno;	577	errno = req->errorno;
296	write (respipe[1], (void *)&req, sizeof (req));	578
		579	PUTBACK;
		580	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		581	SPAGAIN;
		582
		583	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		584	SvREFCNT_dec (sv_result);
		585	else
		586	sv_result_cache = sv_result;
		587
		588	FREETMPS;
		589	LEAVE;
		590
		591	PUTBACK;
297	}	592	}
298		593
		594	return !!SvTRUE (ERRSV);
		595	}
		596
		597	static void req_destroy (aio_req req)
		598	{
		599	if (req->self)
		600	{
		601	sv_unmagic (req->self, PERL_MAGIC_ext);
		602	SvREFCNT_dec (req->self);
		603	}
		604
		605	SvREFCNT_dec (req->sv1);
		606	SvREFCNT_dec (req->sv2);
		607	SvREFCNT_dec (req->callback);
		608
		609	Safefree (req);
		610	}
		611
		612	static void req_cancel_subs (aio_req grp)
		613	{
		614	aio_req sub;
		615
		616	if (grp->type != EIO_GROUP)
		617	return;
		618
		619	SvREFCNT_dec (grp->sv2);
		620	grp->sv2 = 0;
		621
		622	eio_grp_cancel (grp);
		623	}
		624
		625	static void
		626	create_respipe (void)
		627	{
		628	if (s_epipe_renew (&respipe))
		629	croak ("IO::AIO: unable to initialize result pipe");
		630	}
		631
		632	static void poll_wait (void)
		633	{
		634	while (eio_nreqs ())
		635	{
		636	int size;
		637
		638	X_LOCK (reslock);
		639	size = res_queue.size;
		640	X_UNLOCK (reslock);
		641
		642	if (size)
		643	return;
		644
		645	etp_maybe_start_thread ();
		646
		647	s_epipe_wait (&respipe);
		648	}
		649	}
		650
		651	static int poll_cb (void)
		652	{
		653	for (;;)
		654	{
		655	int res = eio_poll ();
		656
		657	if (res > 0)
		658	croak (0);
		659
		660	if (!max_outstanding || max_outstanding > eio_nreqs ())
		661	return res;
		662
		663	poll_wait ();
		664	}
		665	}
		666
		667	static void atfork_child (void)
		668	{
		669	create_respipe ();
		670	}
		671
		672	/*****************************************************************************/
		673
		674	#if !_POSIX_MAPPED_FILES
		675	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		676	# define munmap(addr,length) (errno = ENOSYS, -1)
		677	#endif
		678
		679	#if !_POSIX_MEMORY_PROTECTION
		680	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		681	# define PROT_NONE 0
		682	# define PROT_WRITE 0
		683	# define MAP_PRIVATE 0
		684	# define MAP_SHARED 0
		685	# define MAP_FIXED 0
		686	#endif
		687
		688	#define MMAP_MAGIC PERL_MAGIC_ext
		689
		690	static int
		691	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		692	{
		693	int old_errno = errno;
		694	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		695	errno = old_errno;
		696
		697	mg->mg_obj = 0; /* just in case */
		698
		699	SvREADONLY_off (sv);
		700
		701	if (SvPVX (sv) != mg->mg_ptr)
		702	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		703
		704	SvCUR_set (sv, 0);
		705	SvPVX (sv) = 0;
		706	SvOK_off (sv);
		707
299	return 0;	708	return 0;
300	}	709	}
301		710
		711	static MGVTBL mmap_vtbl = {
		712	0, 0, 0, 0, mmap_free
		713	};
		714
		715	/*****************************************************************************/
		716
		717	static SV *
		718	get_cb (SV *cb_sv)
		719	{
		720	SvGETMAGIC (cb_sv);
		721	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		722	}
		723
		724	#define dREQ \
		725	SV *cb_cv; \
		726	aio_req req; \
		727	int req_pri = next_pri; \
		728	next_pri = EIO_PRI_DEFAULT; \
		729	\
		730	cb_cv = get_cb (callback); \
		731	\
		732	Newz (0, req, 1, eio_req); \
		733	if (!req) \
		734	croak ("out of memory during eio_req allocation"); \
		735	\
		736	req->callback = SvREFCNT_inc (cb_cv); \
		737	req->pri = req_pri
		738
		739	#define REQ_SEND \
		740	PUTBACK; \
		741	req_submit (req); \
		742	SPAGAIN; \
		743	\
		744	if (GIMME_V != G_VOID) \
		745	XPUSHs (req_sv (req, aio_req_stash));
		746
302	MODULE = IO::AIO PACKAGE = IO::AIO	747	MODULE = IO::AIO PACKAGE = IO::AIO
303		748
		749	PROTOTYPES: ENABLE
		750
304	BOOT:	751	BOOT:
305	{	752	{
306	if (pipe (reqpipe) || pipe (respipe))	753	static const struct {
307	croak ("unable to initialize request or result pipe");	754	const char *name;
		755	IV iv;
		756	} *civ, const_iv[] = {
		757	# define const_niv(name, value) { # name, (IV) value },
		758	# define const_iv(name) { # name, (IV) name },
		759	# define const_eio(name) { # name, (IV) EIO_ ## name },
		760	const_iv (EXDEV)
		761	const_iv (ENOSYS)
		762	const_iv (O_RDONLY)
		763	const_iv (O_WRONLY)
		764	const_iv (O_RDWR)
		765	const_iv (O_CREAT)
		766	const_iv (O_TRUNC)
		767	const_iv (O_EXCL)
		768	const_iv (O_APPEND)
308		769
309	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))	770	const_iv (S_IFIFO)
310	croak ("cannot set result pipe to nonblocking mode");	771	const_iv (S_IFCHR)
		772	const_iv (S_IFBLK)
		773	const_iv (S_IFLNK)
		774	const_iv (S_IFREG)
		775	const_iv (S_IFDIR)
		776	const_iv (S_IFWHT)
		777	const_iv (S_IFSOCK)
		778	const_iv (S_IFMT)
311		779
312	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	780	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
313	croak ("cannot set result pipe to nonblocking mode");	781	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
314	}	782	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		783	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		784	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		785	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
315		786
		787	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		788	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		789	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		790	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		791	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		792
		793	const_iv (ST_RDONLY)
		794	const_iv (ST_NOSUID)
		795	const_iv (ST_NODEV)
		796	const_iv (ST_NOEXEC)
		797	const_iv (ST_SYNCHRONOUS)
		798	const_iv (ST_MANDLOCK)
		799	const_iv (ST_WRITE)
		800	const_iv (ST_APPEND)
		801	const_iv (ST_IMMUTABLE)
		802	const_iv (ST_NOATIME)
		803	const_iv (ST_NODIRATIME)
		804	const_iv (ST_RELATIME)
		805
		806	const_iv (PROT_NONE)
		807	const_iv (PROT_EXEC)
		808	const_iv (PROT_READ)
		809	const_iv (PROT_WRITE)
		810
		811	/*const_iv (MAP_FIXED)*/
		812	const_iv (MAP_PRIVATE)
		813	const_iv (MAP_SHARED)
		814	const_iv (MAP_ANONYMOUS)
		815
		816	/* linuxish */
		817	const_iv (MAP_HUGETLB)
		818	const_iv (MAP_LOCKED)
		819	const_iv (MAP_NORESERVE)
		820	const_iv (MAP_POPULATE)
		821	const_iv (MAP_NONBLOCK)
		822
		823	const_eio (MCL_FUTURE)
		824	const_eio (MCL_CURRENT)
		825
		826	const_eio (MS_ASYNC)
		827	const_eio (MS_INVALIDATE)
		828	const_eio (MS_SYNC)
		829
		830	const_eio (MT_MODIFY)
		831
		832	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		833	const_eio (SYNC_FILE_RANGE_WRITE)
		834	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		835
		836	const_eio (READDIR_DENTS)
		837	const_eio (READDIR_DIRS_FIRST)
		838	const_eio (READDIR_STAT_ORDER)
		839	const_eio (READDIR_FOUND_UNKNOWN)
		840
		841	const_eio (DT_UNKNOWN)
		842	const_eio (DT_FIFO)
		843	const_eio (DT_CHR)
		844	const_eio (DT_DIR)
		845	const_eio (DT_BLK)
		846	const_eio (DT_REG)
		847	const_eio (DT_LNK)
		848	const_eio (DT_SOCK)
		849	const_eio (DT_WHT)
		850	};
		851
		852	aio_stash = gv_stashpv ("IO::AIO" , 1);
		853	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		854	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		855
		856	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		857	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		858
		859	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		860
		861	create_respipe ();
		862
		863	if (eio_init (want_poll, done_poll) < 0)
		864	croak ("IO::AIO: unable to initialise eio library");
		865
		866	/* atfork child called in fifo order, so before eio's handler */
		867	X_THREAD_ATFORK (0, 0, atfork_child);
		868	}
		869
316	void	870	void
317	min_parallel(nthreads)	871	max_poll_reqs (unsigned int nreqs)
318	int nthreads
319	PROTOTYPE: $	872	PROTOTYPE: $
320	CODE:	873	CODE:
321	while (nthreads > started)	874	eio_set_max_poll_reqs (nreqs);
322	start_thread ();
323		875
324	void	876	void
325	max_parallel(nthreads)	877	max_poll_time (double nseconds)
326	int nthreads
327	PROTOTYPE: $	878	PROTOTYPE: $
328	CODE:	879	CODE:
		880	eio_set_max_poll_time (nseconds);
		881
		882	void
		883	min_parallel (unsigned int nthreads)
		884	PROTOTYPE: $
		885	CODE:
		886	eio_set_min_parallel (nthreads);
		887
		888	void
		889	max_parallel (unsigned int nthreads)
		890	PROTOTYPE: $
		891	CODE:
		892	eio_set_max_parallel (nthreads);
		893
		894	void
		895	max_idle (unsigned int nthreads)
		896	PROTOTYPE: $
		897	CODE:
		898	eio_set_max_idle (nthreads);
		899
		900	void
		901	idle_timeout (unsigned int seconds)
		902	PROTOTYPE: $
		903	CODE:
		904	eio_set_idle_timeout (seconds);
		905
		906	void
		907	max_outstanding (unsigned int maxreqs)
		908	PROTOTYPE: $
		909	CODE:
		910	max_outstanding = maxreqs;
		911
		912	void
		913	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		914	PPCODE:
329	{	915	{
330	int cur = started;	916	dREQ;
331	while (cur > nthreads)	917
332	{	918	req->type = EIO_OPEN;
333	end_thread ();	919	req->sv1 = newSVsv (pathname);
334	cur--;	920	req->ptr1 = SvPVbyte_nolen (req->sv1);
		921	req->int1 = flags;
		922	req->int2 = mode;
		923
		924	REQ_SEND;
		925	}
		926
		927	void
		928	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		929	ALIAS:
		930	aio_fsync = EIO_FSYNC
		931	aio_fdatasync = EIO_FDATASYNC
		932	PPCODE:
		933	{
		934	int fd = s_fileno_croak (fh, 0);
		935	dREQ;
		936
		937	req->type = ix;
		938	req->sv1 = newSVsv (fh);
		939	req->int1 = fd;
		940
		941	REQ_SEND (req);
		942	}
		943
		944	void
		945	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		946	PPCODE:
		947	{
		948	int fd = s_fileno_croak (fh, 0);
		949	dREQ;
		950
		951	req->type = EIO_SYNC_FILE_RANGE;
		952	req->sv1 = newSVsv (fh);
		953	req->int1 = fd;
		954	req->offs = offset;
		955	req->size = nbytes;
		956	req->int2 = flags;
		957
		958	REQ_SEND (req);
		959	}
		960
		961	void
		962	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		963	PPCODE:
		964	{
		965	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		966	int fd = s_fileno_croak (fh, 0);
		967	dREQ;
		968
		969	if (close_pipe < 0)
		970	{
		971	int pipefd [2];
		972
		973	if (pipe (pipefd) < 0
		974	|| close (pipefd [1]) < 0
		975	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		976	abort (); /*D*/
		977
		978	close_pipe = pipefd [0];
335	}	979	}
336		980
337	while (started > nthreads)	981	req->type = EIO_DUP2;
		982	req->int1 = close_pipe;
		983	req->sv2 = newSVsv (fh);
		984	req->int2 = fd;
		985
		986	REQ_SEND (req);
		987	}
		988
		989	void
		990	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		991	ALIAS:
		992	aio_read = EIO_READ
		993	aio_write = EIO_WRITE
		994	PPCODE:
		995	{
		996	STRLEN svlen;
		997	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		998	char *svptr = SvPVbyte (data, svlen);
		999	UV len = SvUV (length);
		1000
		1001	if (dataoffset < 0)
		1002	dataoffset += svlen;
		1003
		1004	if (dataoffset < 0 || dataoffset > svlen)
		1005	croak ("dataoffset outside of data scalar");
		1006
		1007	if (ix == EIO_WRITE)
338	{	1008	{
339	poll_wait ();	1009	/* write: check length and adjust. */
340	poll_cb (aTHX);	1010	if (!SvOK (length) || len + dataoffset > svlen)
341	}	1011	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	}	1012	}
474	else	1013	else
475	{	1014	{
476	req->type = REQ_FSTAT;	1015	/* read: check type and grow scalar as necessary */
477	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1016	SvUPGRADE (data, SVt_PV);
		1017	svptr = SvGROW (data, len + dataoffset + 1);
478	}	1018	}
479		1019
		1020	{
		1021	dREQ;
		1022
		1023	req->type = ix;
		1024	req->sv1 = newSVsv (fh);
		1025	req->int1 = fd;
		1026	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1027	req->size = len;
480	req->callback = SvREFCNT_inc (callback);	1028	req->sv2 = SvREFCNT_inc (data);
		1029	req->ptr2 = (char *)svptr + dataoffset;
		1030	req->stroffset = dataoffset;
481		1031
482	send_req (req);	1032	if (!SvREADONLY (data))
483	}	1033	{
		1034	SvREADONLY_on (data);
		1035	req->flags |= FLAG_SV2_RO_OFF;
		1036	}
484		1037
		1038	REQ_SEND;
		1039	}
		1040	}
		1041
485	void	1042	void
486	aio_unlink(pathname,callback)	1043	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
487	SV * pathname	1044	PPCODE:
488	SV * callback	1045	{
489	PROTOTYPE: $$	1046	SV *data;
		1047	dREQ;
		1048
		1049	req->type = EIO_READLINK;
		1050	req->sv1 = newSVsv (path);
		1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1052
		1053	REQ_SEND;
		1054	}
		1055
		1056	void
		1057	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1058	PPCODE:
		1059	{
		1060	int ifd = s_fileno_croak (in_fh , 0);
		1061	int ofd = s_fileno_croak (out_fh, 1);
		1062	dREQ;
		1063
		1064	req->type = EIO_SENDFILE;
		1065	req->sv1 = newSVsv (out_fh);
		1066	req->int1 = ofd;
		1067	req->sv2 = newSVsv (in_fh);
		1068	req->int2 = ifd;
		1069	req->offs = in_offset;
		1070	req->size = length;
		1071
		1072	REQ_SEND;
		1073	}
		1074
		1075	void
		1076	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1077	PPCODE:
		1078	{
		1079	int fd = s_fileno_croak (fh, 0);
		1080	dREQ;
		1081
		1082	req->type = EIO_READAHEAD;
		1083	req->sv1 = newSVsv (fh);
		1084	req->int1 = fd;
		1085	req->offs = offset;
		1086	req->size = length;
		1087
		1088	REQ_SEND;
		1089	}
		1090
		1091	void
		1092	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1093	ALIAS:
		1094	aio_stat = EIO_STAT
		1095	aio_lstat = EIO_LSTAT
		1096	aio_statvfs = EIO_STATVFS
490	CODE:	1097	PPCODE:
491	{	1098	{
492	aio_req req;	1099	dREQ;
		1100
		1101	req->sv1 = newSVsv (fh_or_path);
		1102
		1103	if (SvPOK (req->sv1))
		1104	{
		1105	req->type = ix;
		1106	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1107	}
		1108	else
		1109	{
		1110	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1111	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1112	}
		1113
		1114	REQ_SEND;
		1115	}
		1116
		1117	UV
		1118	major (UV dev)
		1119	ALIAS:
		1120	minor = 1
		1121	CODE:
		1122	RETVAL = ix ? major (dev) : minor (dev);
		1123	OUTPUT:
		1124	RETVAL
		1125
		1126	UV
		1127	makedev (UV maj, UV min)
		1128	CODE:
		1129	RETVAL = makedev (maj, min);
		1130	OUTPUT:
		1131	RETVAL
		1132
		1133	void
		1134	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1135	PPCODE:
		1136	{
		1137	dREQ;
		1138
		1139	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1140	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1141	req->sv1 = newSVsv (fh_or_path);
		1142
		1143	if (SvPOK (req->sv1))
		1144	{
		1145	req->type = EIO_UTIME;
		1146	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1147	}
		1148	else
		1149	{
		1150	req->type = EIO_FUTIME;
		1151	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1152	}
		1153
		1154	REQ_SEND;
		1155	}
		1156
		1157	void
		1158	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1159	PPCODE:
		1160	{
		1161	dREQ;
		1162
		1163	req->sv1 = newSVsv (fh_or_path);
		1164	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1165
		1166	if (SvPOK (req->sv1))
		1167	{
		1168	req->type = EIO_TRUNCATE;
		1169	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1170	}
		1171	else
		1172	{
		1173	req->type = EIO_FTRUNCATE;
		1174	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1175	}
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1182	ALIAS:
		1183	aio_chmod = EIO_CHMOD
		1184	aio_mkdir = EIO_MKDIR
		1185	PPCODE:
		1186	{
		1187	dREQ;
		1188
		1189	req->int2 = mode;
		1190	req->sv1 = newSVsv (fh_or_path);
		1191
		1192	if (SvPOK (req->sv1))
		1193	{
		1194	req->type = ix;
		1195	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1196	}
		1197	else
		1198	{
		1199	req->type = EIO_FCHMOD;
		1200	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1201	}
		1202
		1203	REQ_SEND;
		1204	}
		1205
		1206	void
		1207	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1208	PPCODE:
		1209	{
		1210	dREQ;
		1211
		1212	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1213	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1214	req->sv1 = newSVsv (fh_or_path);
		1215
		1216	if (SvPOK (req->sv1))
		1217	{
		1218	req->type = EIO_CHOWN;
		1219	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1220	}
		1221	else
		1222	{
		1223	req->type = EIO_FCHOWN;
		1224	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1225	}
		1226
		1227	REQ_SEND;
		1228	}
		1229
		1230	void
		1231	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1232	PPCODE:
		1233	{
		1234	dREQ;
493		1235
494	Newz (0, req, 1, aio_cb);	1236	req->type = EIO_READDIR;
		1237	req->sv1 = newSVsv (pathname);
		1238	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1239	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1240
		1241	if (flags & EIO_READDIR_DENTS)
		1242	req->int1 |= EIO_READDIR_CUSTOM2;
		1243
		1244	REQ_SEND;
		1245	}
		1246
		1247	void
		1248	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1249	ALIAS:
		1250	aio_unlink = EIO_UNLINK
		1251	aio_rmdir = EIO_RMDIR
		1252	aio_readdir = EIO_READDIR
		1253	PPCODE:
		1254	{
		1255	dREQ;
495		1256
496	if (!req)	1257	req->type = ix;
497	croak ("out of memory during aio_req allocation");	1258	req->sv1 = newSVsv (pathname);
		1259	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1260
		1261	REQ_SEND;
		1262	}
		1263
		1264	void
		1265	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1266	ALIAS:
		1267	aio_link = EIO_LINK
		1268	aio_symlink = EIO_SYMLINK
		1269	aio_rename = EIO_RENAME
		1270	PPCODE:
		1271	{
		1272	dREQ;
498		1273
499	req->type = REQ_UNLINK;	1274	req->type = ix;
500	req->data = newSVsv (pathname);	1275	req->sv1 = newSVsv (oldpath);
501	req->dataptr = SvPV_nolen (req->data);	1276	req->ptr1 = SvPVbyte_nolen (req->sv1);
502	req->callback = SvREFCNT_inc (callback);	1277	req->sv2 = newSVsv (newpath);
		1278	req->ptr2 = SvPVbyte_nolen (req->sv2);
503		1279
504	send_req (req);	1280	REQ_SEND;
		1281	}
		1282
		1283	void
		1284	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1285	PPCODE:
		1286	{
		1287	dREQ;
		1288
		1289	req->type = EIO_MKNOD;
		1290	req->sv1 = newSVsv (pathname);
		1291	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1292	req->int2 = (mode_t)mode;
		1293	req->offs = dev;
		1294
		1295	REQ_SEND;
		1296	}
		1297
		1298	void
		1299	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1300	ALIAS:
		1301	aio_mtouch = EIO_MTOUCH
		1302	aio_msync = EIO_MSYNC
		1303	PPCODE:
		1304	{
		1305	STRLEN svlen;
		1306	char *svptr = SvPVbyte (data, svlen);
		1307	UV len = SvUV (length);
		1308
		1309	if (offset < 0)
		1310	offset += svlen;
		1311
		1312	if (offset < 0 || offset > svlen)
		1313	croak ("offset outside of scalar");
		1314
		1315	if (!SvOK (length) || len + offset > svlen)
		1316	len = svlen - offset;
		1317
		1318	{
		1319	dREQ;
		1320
		1321	req->type = ix;
		1322	req->sv2 = SvREFCNT_inc (data);
		1323	req->ptr2 = (char *)svptr + offset;
		1324	req->size = len;
		1325	req->int1 = flags;
		1326
		1327	REQ_SEND;
		1328	}
		1329	}
		1330
		1331	void
		1332	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1333	PPCODE:
		1334	{
		1335	STRLEN svlen;
		1336	char *svptr = SvPVbyte (data, svlen);
		1337	UV len = SvUV (length);
		1338
		1339	if (offset < 0)
		1340	offset += svlen;
		1341
		1342	if (offset < 0 || offset > svlen)
		1343	croak ("offset outside of scalar");
		1344
		1345	if (!SvOK (length) || len + offset > svlen)
		1346	len = svlen - offset;
		1347
		1348	{
		1349	dREQ;
		1350
		1351	req->type = EIO_MLOCK;
		1352	req->sv2 = SvREFCNT_inc (data);
		1353	req->ptr2 = (char *)svptr + offset;
		1354	req->size = len;
		1355
		1356	REQ_SEND;
		1357	}
		1358	}
		1359
		1360	void
		1361	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1362	PPCODE:
		1363	{
		1364	dREQ;
		1365
		1366	req->type = EIO_MLOCKALL;
		1367	req->int1 = flags;
		1368
		1369	REQ_SEND;
		1370	}
		1371
		1372	void
		1373	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = EIO_BUSY;
		1379	req->nv1 = delay < 0. ? 0. : delay;
		1380
		1381	REQ_SEND;
		1382	}
		1383
		1384	void
		1385	aio_group (SV *callback=&PL_sv_undef)
		1386	PPCODE:
		1387	{
		1388	dREQ;
		1389
		1390	req->type = EIO_GROUP;
		1391
		1392	req_submit (req);
		1393	XPUSHs (req_sv (req, aio_grp_stash));
		1394	}
		1395
		1396	void
		1397	aio_nop (SV *callback=&PL_sv_undef)
		1398	ALIAS:
		1399	aio_nop = EIO_NOP
		1400	aio_sync = EIO_SYNC
		1401	PPCODE:
		1402	{
		1403	dREQ;
		1404
		1405	req->type = ix;
		1406
		1407	REQ_SEND;
505	}	1408	}
506		1409
507	int	1410	int
508	poll_fileno()	1411	aioreq_pri (int pri = 0)
509	PROTOTYPE:
510	CODE:	1412	CODE:
511	RETVAL = respipe[0];	1413	RETVAL = next_pri;
		1414	if (items > 0)
		1415	{
		1416	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1417	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1418	next_pri = pri;
		1419	}
512	OUTPUT:	1420	OUTPUT:
513	RETVAL	1421	RETVAL
514		1422
		1423	void
		1424	aioreq_nice (int nice = 0)
		1425	CODE:
		1426	nice = next_pri - nice;
		1427	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1428	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1429	next_pri = nice;
		1430
		1431	void
		1432	flush ()
		1433	CODE:
		1434	while (eio_nreqs ())
		1435	{
		1436	poll_wait ();
		1437	poll_cb ();
		1438	}
		1439
515	int	1440	int
516	poll_cb(...)	1441	poll ()
517	PROTOTYPE:
518	CODE:	1442	CODE:
		1443	poll_wait ();
519	RETVAL = poll_cb (aTHX);	1444	RETVAL = poll_cb ();
520	OUTPUT:	1445	OUTPUT:
521	RETVAL	1446	RETVAL
522		1447
523	void
524	poll_wait()
525	PROTOTYPE:
526	CODE:
527	poll_wait ();
528
529	int	1448	int
530	nreqs()	1449	poll_fileno ()
531	PROTOTYPE:
532	CODE:	1450	CODE:
533	RETVAL = nreqs;	1451	RETVAL = s_epipe_fd (&respipe);
534	OUTPUT:	1452	OUTPUT:
535	RETVAL	1453	RETVAL
536		1454
		1455	int
		1456	poll_cb (...)
		1457	PROTOTYPE:
		1458	CODE:
		1459	RETVAL = poll_cb ();
		1460	OUTPUT:
		1461	RETVAL
		1462
		1463	void
		1464	poll_wait ()
		1465	CODE:
		1466	poll_wait ();
		1467
		1468	int
		1469	nreqs ()
		1470	CODE:
		1471	RETVAL = eio_nreqs ();
		1472	OUTPUT:
		1473	RETVAL
		1474
		1475	int
		1476	nready ()
		1477	CODE:
		1478	RETVAL = eio_nready ();
		1479	OUTPUT:
		1480	RETVAL
		1481
		1482	int
		1483	npending ()
		1484	CODE:
		1485	RETVAL = eio_npending ();
		1486	OUTPUT:
		1487	RETVAL
		1488
		1489	int
		1490	nthreads ()
		1491	CODE:
		1492	RETVAL = eio_nthreads ();
		1493	OUTPUT:
		1494	RETVAL
		1495
		1496	int
		1497	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1498	CODE:
		1499	RETVAL = posix_fadvise (fh, offset, length, advice);
		1500	OUTPUT:
		1501	RETVAL
		1502
		1503	ssize_t
		1504	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1505	CODE:
		1506	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	void
		1511	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1512	PPCODE:
		1513	sv_unmagic (scalar, MMAP_MAGIC);
		1514	{
		1515	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1516	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1517	if (addr == (void *)-1)
		1518	XSRETURN_NO;
		1519
		1520	sv_force_normal (scalar);
		1521
		1522	/* we store the length in mg_obj, as namlen is I32 :/ */
		1523	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1524	->mg_obj = (SV *)length;
		1525
		1526	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1527
		1528	if (!(prot & PROT_WRITE))
		1529	SvREADONLY_on (scalar);
		1530
		1531	if (SvLEN (scalar))
		1532	Safefree (SvPVX (scalar));
		1533
		1534	SvPVX (scalar) = (char *)addr;
		1535	SvCUR_set (scalar, length);
		1536	SvLEN_set (scalar, 0);
		1537	SvPOK_only (scalar);
		1538
		1539	XSRETURN_YES;
		1540	}
		1541
		1542	void
		1543	munmap (SV *scalar)
		1544	CODE:
		1545	sv_unmagic (scalar, MMAP_MAGIC);
		1546
		1547	int
		1548	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1549	ALIAS:
		1550	mprotect = 1
		1551	CODE:
		1552	{
		1553	STRLEN svlen;
		1554	void *addr = SvPVbyte (scalar, svlen);
		1555	size_t len = SvUV (length);
		1556
		1557	if (offset < 0)
		1558	offset += svlen;
		1559
		1560	if (offset < 0 || offset > svlen)
		1561	croak ("offset outside of scalar");
		1562
		1563	if (!SvOK (length) || len + offset > svlen)
		1564	len = svlen - offset;
		1565
		1566	addr = (void *)(((intptr_t)addr) + offset);
		1567	eio_page_align (&addr, &len);
		1568
		1569	switch (ix)
		1570	{
		1571	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1572	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1573	}
		1574	}
		1575	OUTPUT:
		1576	RETVAL
		1577
		1578	int
		1579	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1580	CODE:
		1581	{
		1582	STRLEN svlen;
		1583	void *addr = SvPVbyte (scalar, svlen);
		1584	size_t len = SvUV (length);
		1585
		1586	if (offset < 0)
		1587	offset += svlen;
		1588
		1589	if (offset < 0 || offset > svlen)
		1590	croak ("offset outside of scalar");
		1591
		1592	if (!SvOK (length) || len + offset > svlen)
		1593	len = svlen - offset;
		1594
		1595	addr = (void *)(((intptr_t)addr) + offset);
		1596	eio_page_align (&addr, &len);
		1597	#if _POSIX_MEMLOCK_RANGE
		1598	RETVAL = munlock (addr, len);
		1599	#else
		1600	RETVAL = ((errno = ENOSYS), -1);
		1601	#endif
		1602	}
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	int
		1607	munlockall ()
		1608	CODE:
		1609	#if _POSIX_MEMLOCK
		1610	munlockall ();
		1611	#else
		1612	RETVAL = -1;
		1613	errno = ENOSYS;
		1614	#endif
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	void _on_next_submit (SV *cb)
		1619	CODE:
		1620	SvREFCNT_dec (on_next_submit);
		1621	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1622
		1623	PROTOTYPES: DISABLE
		1624
		1625	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1626
		1627	void
		1628	cancel (aio_req_ornot req)
		1629	CODE:
		1630	eio_cancel (req);
		1631
		1632	void
		1633	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1634	PPCODE:
		1635	{
		1636	if (GIMME_V != G_VOID)
		1637	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1638
		1639	if (items > 1)
		1640	{
		1641	SV *cb_cv =get_cb (callback);
		1642
		1643	SvREFCNT_dec (req->callback);
		1644	req->callback = SvREFCNT_inc (cb_cv);
		1645	}
		1646	}
		1647
		1648	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1649
		1650	void
		1651	add (aio_req grp, ...)
		1652	PPCODE:
		1653	{
		1654	int i;
		1655
		1656	if (grp->int1 == 2)
		1657	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1658
		1659	for (i = 1; i < items; ++i )
		1660	{
		1661	aio_req req;
		1662
		1663	if (GIMME_V != G_VOID)
		1664	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1665
		1666	req = SvAIO_REQ (ST (i));
		1667
		1668	if (req)
		1669	eio_grp_add (grp, req);
		1670	}
		1671	}
		1672
		1673	void
		1674	cancel_subs (aio_req_ornot req)
		1675	CODE:
		1676	req_cancel_subs (req);
		1677
		1678	void
		1679	result (aio_req grp, ...)
		1680	CODE:
		1681	{
		1682	int i;
		1683	AV *av;
		1684
		1685	grp->errorno = errno;
		1686
		1687	av = newAV ();
		1688	av_extend (av, items - 1);
		1689
		1690	for (i = 1; i < items; ++i )
		1691	av_push (av, newSVsv (ST (i)));
		1692
		1693	SvREFCNT_dec (grp->sv1);
		1694	grp->sv1 = (SV *)av;
		1695	}
		1696
		1697	void
		1698	errno (aio_req grp, int errorno = errno)
		1699	CODE:
		1700	grp->errorno = errorno;
		1701
		1702	void
		1703	limit (aio_req grp, int limit)
		1704	CODE:
		1705	eio_grp_limit (grp, limit);
		1706
		1707	void
		1708	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1709	CODE:
		1710	{
		1711	SvREFCNT_dec (grp->sv2);
		1712	grp->sv2 = newSVsv (callback);
		1713	grp->feed = aio_grp_feed;
		1714
		1715	if (grp->int2 <= 0)
		1716	grp->int2 = 2;
		1717
		1718	eio_grp_limit (grp, grp->int2);
		1719	}
		1720

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