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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC vs.
Revision 1.164 by root, Tue May 4 21:14:01 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
18	#include <limits.h>	17	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	18	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	19	#include <sched.h>
23		20
24	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
25	# if __linux
26	# include <sys/sendfile.h>	22	# include <sys/mman.h>
27	# elif __freebsd	23	#endif
28	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		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
		66	#else
		67
29	# include <sys/uio.h>	68	# include <sys/time.h>
30	# elif __hpux
31	# include <sys/socket.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.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/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		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	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
34	# else	186	# else
35	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	188	# endif
37	#endif	189	#endif
38		190	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	191	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	192	#endif
43		193	#ifndef MAP_LOCKED
44	#if __ia64	194	# define MAP_LOCKED 0
45	# define STACKSIZE 65536
46	#else
47	# define STACKSIZE 8192
48	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
		205
		206	#ifndef PAGESIZE
		207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
		209
		210	static int req_invoke (eio_req *req);
		211	#define EIO_FINISH(req) req_invoke (req)
		212	static void req_destroy (eio_req *grp);
		213	#define EIO_DESTROY(req) req_destroy (req)
49		214
50	enum {	215	enum {
51	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};	217	};
63		218
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		220
67	typedef struct aio_cb
68	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;
90
91	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
93		223
94	static int started, wanted;	224	static SV *on_next_submit;
95	static volatile int nreqs;	225	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	226	static int max_outstanding;
97	static int respipe [2];
98		227
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		229
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	231	static void req_cancel (aio_req req);
		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
107		244
108	/* must be called at most once */	245	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
110	{	247	{
		248	if (!req->self)
		249	{
111	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		252	}
113		253
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
115	}	255	}
116		256
117	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
118	{	258	{
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	259	MAGIC *mg;
		260
		261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
120	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
121		266
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		268
124	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	270	}
126		271
127	static void poll_wait ()	272	static void aio_grp_feed (aio_req grp)
128	{	273	{
129	if (nreqs && !ress)	274	if (grp->sv2 && SvOK (grp->sv2))
130	{	275	{
131	fd_set rfd;	276	dSP;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		277
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	278	ENTER;
		279	SAVETMPS;
		280	PUSHMARK (SP);
		281	XPUSHs (req_sv (grp, aio_grp_stash));
		282	PUTBACK;
		283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		284	SPAGAIN;
		285	FREETMPS;
		286	LEAVE;
136	}	287	}
137	}	288	}
138		289
		290	static void req_submit (eio_req *req)
		291	{
		292	eio_submit (req);
		293
		294	if (expect_false (on_next_submit))
		295	{
		296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
		304	}
		305	}
		306
139	static void req_invoke (aio_req req)	307	static int req_invoke (eio_req *req)
140	{	308	{
141	dSP;	309	dSP;
142	int errorno = errno;
143		310
144	if (req->cancelled || !SvOK (req->callback))	311	if (req->flags & FLAG_SV2_RO_OFF)
145	return;	312	SvREADONLY_off (req->sv2);
146		313
147	errno = req->errorno;	314	if (!EIO_CANCELLED (req) && req->callback)
148
149	ENTER;
150	PUSHMARK (SP);
151	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	315	{
155	case REQ_READDIR:	316	ENTER;
		317	SAVETMPS;
		318	PUSHMARK (SP);
		319	EXTEND (SP, 1);
		320
		321	switch (req->type)
156	{	322	{
157	SV *rv = &PL_sv_undef;	323	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	324	{
161	char *buf = req->data2ptr;	325	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		326
164	while (req->result)	327	if (req->result >= 0)
165	{	328	{
		329	int i;
		330	char *names = (char *)req->ptr2;
		331	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
166	SV *sv = newSVpv (buf, 0);	332	AV *av = newAV ();
167		333
168	av_push (av, sv);	334	av_extend (av, req->result - 1);
		335
		336	for (i = 0; i < req->result; ++i)
		337	{
		338	if (req->int1 & EIO_READDIR_DENTS)
		339	{
		340	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		341
		342	if (req->int1 & EIO_READDIR_CUSTOM2)
		343	{
		344	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		345	AV *avent = newAV ();
		346
		347	av_extend (avent, 2);
		348
		349	if (!sv_type [ent->type])
		350	{
		351	sv_type [ent->type] = newSViv (ent->type);
		352	SvREADONLY_on (sv_type [ent->type]);
		353	}
		354
		355	av_store (avent, 0, namesv);
		356	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		357	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		358
		359	av_store (av, i, newRV_noinc ((SV *)avent));
		360	}
		361	else
		362	av_store (av, i, namesv);
		363
		364	++ent;
		365	}
		366	else
		367	{
		368	SV *name = newSVpv (names, 0);
		369	av_store (av, i, name);
169	buf += SvCUR (sv) + 1;	370	names += SvCUR (name) + 1;
170	req->result--;	371	}
		372	}
		373
		374	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	375	}
172		376
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	377	PUSHs (rv);
		378
		379	if (req->int1 & EIO_READDIR_CUSTOM1)
		380	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
174	}	381	}
		382	break;
175		383
		384	case EIO_OPEN:
		385	{
		386	/* convert fd to fh */
		387	SV *fh = &PL_sv_undef;
		388
		389	if (req->result >= 0)
		390	{
		391	GV *gv = (GV *)sv_newmortal ();
		392	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		393	char sym [64];
		394	int symlen;
		395
		396	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		397	gv_init (gv, aio_stash, sym, symlen, 0);
		398
		399	symlen = snprintf (
		400	sym,
		401	sizeof (sym),
		402	"%s&=%d",
		403	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		404	(int)req->result
		405	);
		406
		407	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		408	fh = (SV *)gv;
		409	}
		410
		411	PUSHs (fh);
		412	}
		413	break;
		414
		415	case EIO_STATVFS:
		416	case EIO_FSTATVFS:
		417	{
		418	SV *rv = &PL_sv_undef;
		419
		420	if (req->result >= 0)
		421	{
		422	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		423	HV *hv = newHV ();
		424
		425	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		426
		427	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		428	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		429	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		430	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		431	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		432	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		433	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		434	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		435	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		436	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		437	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		438	}
		439
176	PUSHs (rv);	440	PUSHs (rv);
		441	}
		442
		443	break;
		444
		445	case EIO_GROUP:
		446	req->int1 = 2; /* mark group as finished */
		447
		448	if (req->sv1)
		449	{
		450	int i;
		451	AV *av = (AV *)req->sv1;
		452
		453	EXTEND (SP, AvFILL (av) + 1);
		454	for (i = 0; i <= AvFILL (av); ++i)
		455	PUSHs (*av_fetch (av, i, 0));
		456	}
		457	break;
		458
		459	case EIO_NOP:
		460	case EIO_BUSY:
		461	break;
		462
		463	case EIO_READLINK:
		464	if (req->result > 0)
		465	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		466	break;
		467
		468	case EIO_STAT:
		469	case EIO_LSTAT:
		470	case EIO_FSTAT:
		471	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		472	PL_laststatval = req->result;
		473	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		474	PUSHs (sv_2mortal (newSViv (req->result)));
		475	break;
		476
		477	case EIO_READ:
		478	{
		479	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		480	*SvEND (req->sv2) = 0;
		481	SvPOK_only (req->sv2);
		482	SvSETMAGIC (req->sv2);
		483	PUSHs (sv_2mortal (newSViv (req->result)));
		484	}
		485	break;
		486
		487	case EIO_DUP2:
		488	if (req->result > 0)
		489	req->result = 0;
		490	/* FALLTHROUGH */
		491
		492	default:
		493	PUSHs (sv_2mortal (newSViv (req->result)));
		494	break;
177	}	495	}
178	break;
179		496
180	case REQ_OPEN:	497	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		498
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	499	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	500	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	501	SPAGAIN;
189		502
190	fh = SvREFCNT_inc (POPs);	503	FREETMPS;
		504	LEAVE;
191		505
192	PUSHMARK (SP);	506	PUTBACK;
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_GROUP:
198	if (req->data)
199	{
200	int i;
201	AV *av = (AV *)req->data;
202
203	EXTEND (SP, AvFILL (av) + 1);
204	for (i = 0; i <= AvFILL (av); ++i)
205	PUSHs (*av_fetch (av, i, 0));
206	}
207	break;
208
209	case REQ_SLEEP:
210	break;
211
212	default:
213	PUSHs (sv_2mortal (newSViv (req->result)));
214	break;
215	}	507	}
216		508
217		509	return !!SvTRUE (ERRSV);
218	PUTBACK;
219	call_sv (req->callback, G_VOID | G_EVAL);
220	SPAGAIN;
221
222	if (SvTRUE (ERRSV))
223	{
224	req_free (req);
225	croak (0);
226	}
227
228	LEAVE;
229
230	errno = errorno;
231	}	510	}
232		511
233	static void req_free (aio_req req)	512	static void req_destroy (aio_req req)
234	{	513	{
235	if (req->grp)
236	{
237	aio_req grp = req->grp;
238
239	/* unlink request */
240	req->grp_next->grp_prev = req->grp_prev;
241	req->grp_prev->grp_next = req->grp_next;
242
243	if (grp->grp_next == grp && grp->fd)
244	{
245	req_invoke (grp);
246	req_free (grp);
247	}
248	}
249
250	if (req->self)	514	if (req->self)
251	{	515	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	516	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	517	SvREFCNT_dec (req->self);
254	}	518	}
255		519
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	520	SvREFCNT_dec (req->sv1);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	521	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	522	SvREFCNT_dec (req->callback);
270
271	if (req->type == REQ_READDIR && req->result >= 0)
272	free (req->data2ptr);
273		523
274	Safefree (req);	524	Safefree (req);
275	}	525	}
276		526
277	static void req_cancel (aio_req req)	527	static void req_cancel_subs (aio_req grp)
278	{	528	{
279	req->cancelled = 1;	529	aio_req sub;
280		530
281	if (req->type == REQ_GROUP)	531	if (grp->type != EIO_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->sv2);
		535	grp->sv2 = 0;
		536
		537	eio_grp_cancel (grp);
		538	}
		539
		540	static void
		541	create_respipe (void)
		542	{
		543	if (s_epipe_renew (&respipe))
		544	croak ("IO::AIO: unable to initialize result pipe");
		545	}
		546
		547	static void poll_wait (void)
		548	{
		549	while (eio_nreqs ())
282	{	550	{
283	aio_req sub;	551	int size;
284		552
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	553	X_LOCK (reslock);
286	req_cancel (sub);	554	size = res_queue.size;
		555	X_UNLOCK (reslock);
		556
		557	if (size)
		558	return;
		559
		560	etp_maybe_start_thread ();
		561
		562	s_epipe_wait (&respipe);
287	}	563	}
288	}	564	}
289		565
290	static int poll_cb ()	566	static int poll_cb (void)
291	{	567	{
292	dSP;
293	int count = 0;
294	int do_croak = 0;
295	aio_req req;
296
297	for (;;)	568	for (;;)
298	{	569	{
299	pthread_mutex_lock (&reslock);	570	int res = eio_poll ();
300	req = ress;
301		571
302	if (req)	572	if (res > 0)
303	{
304	ress = req->next;
305
306	if (!ress)
307	{
308	/* read any signals sent by the worker threads */
309	char buf [32];
310	while (read (respipe [0], buf, 32) == 32)
311	;
312
313	rese = 0;
314	}
315	}
316
317	pthread_mutex_unlock (&reslock);
318
319	if (!req)
320	break;	573	croak (0);
321		574
322	nreqs--;	575	if (!max_outstanding || max_outstanding > eio_nreqs ())
		576	return res;
323		577
324	if (req->type == REQ_QUIT)	578	poll_wait ();
325	started--;
326	else if (req->type == REQ_GROUP && req->grp_next != req)
327	{
328	req->fd = 1; /* mark request as delayed */
329	continue;
330	}
331	else
332	{
333	if (req->type == REQ_READ)
334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
335
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
337	SvREADONLY_off (req->data);
338
339	if (req->statdata)
340	{
341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
342	PL_laststatval = req->result;
343	PL_statcache = *(req->statdata);
344	}
345
346	req_invoke (req);
347
348	count++;
349	}
350
351	req_free (req);
352	}	579	}
353
354	return count;
355	}	580	}
356		581
357	static void *aio_proc(void *arg);
358
359	static void start_thread (void)	582	static void atfork_child (void)
360	{	583	{
361	sigset_t fullsigset, oldsigset;	584	create_respipe ();
362	pthread_t tid;
363	pthread_attr_t attr;
364
365	pthread_attr_init (&attr);
366	pthread_attr_setstacksize (&attr, STACKSIZE);
367	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
368
369	sigfillset (&fullsigset);
370	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
371
372	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
373	started++;
374
375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
376	}
377
378	static void req_send (aio_req req)
379	{
380	while (started < wanted && nreqs >= started)
381	start_thread ();
382
383	nreqs++;
384
385	pthread_mutex_lock (&reqlock);
386
387	req->next = 0;
388
389	if (reqe)
390	{
391	reqe->next = req;
392	reqe = req;
393	}
394	else
395	reqe = reqs = req;
396
397	pthread_cond_signal (&reqwait);
398	pthread_mutex_unlock (&reqlock);
399
400	if (nreqs > max_outstanding)
401	for (;;)
402	{
403	poll_cb ();
404
405	if (nreqs <= max_outstanding)
406	break;
407
408	poll_wait ();
409	}
410	}
411
412	static void end_thread (void)
413	{
414	aio_req req;
415	Newz (0, req, 1, aio_cb);
416	req->type = REQ_QUIT;
417
418	req_send (req);
419	}
420
421	static void min_parallel (int nthreads)
422	{
423	if (wanted < nthreads)
424	wanted = nthreads;
425	}
426
427	static void max_parallel (int nthreads)
428	{
429	int cur = started;
430
431	if (wanted > nthreads)
432	wanted = nthreads;
433
434	while (cur > wanted)
435	{
436	end_thread ();
437	cur--;
438	}
439
440	while (started > wanted)
441	{
442	poll_wait ();
443	poll_cb ();
444	}
445	}
446
447	static void create_pipe ()
448	{
449	if (pipe (respipe))
450	croak ("unable to initialize result pipe");
451
452	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
453	croak ("cannot set result pipe to nonblocking mode");
454
455	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
456	croak ("cannot set result pipe to nonblocking mode");
457	}	585	}
458		586
459	/*****************************************************************************/	587	/*****************************************************************************/
460	/* work around various missing functions */
461		588
462	#if !HAVE_PREADWRITE	589	#if !_POSIX_MAPPED_FILES
463	# define pread aio_pread	590	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
464	# define pwrite aio_pwrite	591	# define munmap(addr,length) (errno = ENOSYS, -1)
465
466	/*
467	* make our pread/pwrite safe against themselves, but not against
468	* normal read/write by using a mutex. slows down execution a lot,
469	* but that's your problem, not mine.
470	*/
471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
472
473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
474	{
475	ssize_t res;
476	off_t ooffset;
477
478	pthread_mutex_lock (&preadwritelock);
479	ooffset = lseek (fd, 0, SEEK_CUR);
480	lseek (fd, offset, SEEK_SET);
481	res = read (fd, buf, count);
482	lseek (fd, ooffset, SEEK_SET);
483	pthread_mutex_unlock (&preadwritelock);
484
485	return res;
486	}
487
488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
489	{
490	ssize_t res;
491	off_t ooffset;
492
493	pthread_mutex_lock (&preadwritelock);
494	ooffset = lseek (fd, 0, SEEK_CUR);
495	lseek (fd, offset, SEEK_SET);
496	res = write (fd, buf, count);
497	lseek (fd, offset, SEEK_SET);
498	pthread_mutex_unlock (&preadwritelock);
499
500	return res;
501	}
502	#endif
503
504	#if !HAVE_FDATASYNC
505	# define fdatasync fsync
506	#endif
507
508	#if !HAVE_READAHEAD
509	# define readahead aio_readahead
510
511	static ssize_t readahead (int fd, off_t offset, size_t count)
512	{
513	char readahead_buf[4096];
514
515	while (count > 0)
516	{
517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
518
519	pread (fd, readahead_buf, len, offset);
520	offset += len;
521	count -= len;
522	}
523
524	errno = 0;
525	}
526	#endif
527
528	#if !HAVE_READDIR_R
529	# define readdir_r aio_readdir_r
530
531	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
532
533	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
534	{
535	struct dirent *e;
536	int errorno;
537
538	pthread_mutex_lock (&readdirlock);
539
540	e = readdir (dirp);
541	errorno = errno;
542
543	if (e)
544	{
545	*res = ent;
546	strcpy (ent->d_name, e->d_name);
547	}
548	else
549	*res = 0;
550
551	pthread_mutex_unlock (&readdirlock);
552
553	errno = errorno;
554	return e ? 0 : -1;
555	}
556	#endif
557
558	/* sendfile always needs emulation */
559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
560	{
561	ssize_t res;
562
563	if (!count)
564	return 0;
565
566	#if HAVE_SENDFILE
567	# if __linux
568	res = sendfile (ofd, ifd, &offset, count);
569
570	# elif __freebsd
571	/*
572	* Of course, the freebsd sendfile is a dire hack with no thoughts
573	* wasted on making it similar to other I/O functions.
574	*/
575	{
576	off_t sbytes;
577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
578
579	if (res < 0 && sbytes)
580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
581	res = sbytes;
582	}
583
584	# elif __hpux
585	res = sendfile (ofd, ifd, offset, count, 0, 0);
586
587	# elif __solaris
588	{
589	struct sendfilevec vec;
590	size_t sbytes;
591
592	vec.sfv_fd = ifd;
593	vec.sfv_flag = 0;
594	vec.sfv_off = offset;
595	vec.sfv_len = count;
596
597	res = sendfilev (ofd, &vec, 1, &sbytes);
598
599	if (res < 0 && sbytes)
600	res = sbytes;
601	}
602
603	# endif	592	#endif
604	#else
605	res = -1;
606	errno = ENOSYS;
607	#endif
608		593
609	if (res < 0	594	#define MMAP_MAGIC PERL_MAGIC_ext
610	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
611	#if __solaris
612	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
613	#endif
614	)
615	)
616	{
617	/* emulate sendfile. this is a major pain in the ass */
618	char buf[4096];
619	res = 0;
620		595
621	while (count)	596	static int
622	{	597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
623	ssize_t cnt;
624
625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
626
627	if (cnt <= 0)
628	{
629	if (cnt && !res) res = -1;
630	break;
631	}
632
633	cnt = write (ofd, buf, cnt);
634
635	if (cnt <= 0)
636	{
637	if (cnt && !res) res = -1;
638	break;
639	}
640
641	offset += cnt;
642	res += cnt;
643	count -= cnt;
644	}
645	}
646
647	return res;
648	}
649
650	/* read a full directory */
651	static int scandir_ (const char *path, void **namesp)
652	{	598	{
653	DIR *dirp = opendir (path);	599	int old_errno = errno;
654	union	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
655	{
656	struct dirent d;
657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
658	} u;
659	struct dirent *entp;
660	char *name, *names;
661	int memlen = 4096;
662	int memofs = 0;
663	int res = 0;
664	int errorno;
665
666	if (!dirp)
667	return -1;
668
669	names = malloc (memlen);
670
671	for (;;)
672	{
673	errno = 0, readdir_r (dirp, &u.d, &entp);
674
675	if (!entp)
676	break;
677
678	name = entp->d_name;
679
680	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
681	{
682	int len = strlen (name) + 1;
683
684	res++;
685
686	while (memofs + len > memlen)
687	{
688	memlen *= 2;
689	names = realloc (names, memlen);
690	if (!names)
691	break;
692	}
693
694	memcpy (names + memofs, name, len);
695	memofs += len;
696	}
697	}
698
699	errorno = errno;	601	errno = old_errno;
700	closedir (dirp);
701		602
702	if (errorno)	603	mg->mg_obj = 0; /* just in case */
703	{
704	free (names);
705	errno = errorno;
706	res = -1;
707	}
708		604
709	*namesp = (void *)names;	605	SvREADONLY_off (sv);
		606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
		610
710	return res;	611	return 0;
711	}	612	}
		613
		614	static MGVTBL mmap_vtbl = {
		615	0, 0, 0, 0, mmap_free
		616	};
712		617
713	/*****************************************************************************/	618	/*****************************************************************************/
714		619
715	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
716	{	622	{
717	aio_req req;	623	SvGETMAGIC (cb_sv);
718	int type;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
719
720	do
721	{
722	pthread_mutex_lock (&reqlock);
723
724	for (;;)
725	{
726	req = reqs;
727
728	if (reqs)
729	{
730	reqs = reqs->next;
731	if (!reqs) reqe = 0;
732	}
733
734	if (req)
735	break;
736
737	pthread_cond_wait (&reqwait, &reqlock);
738	}
739
740	pthread_mutex_unlock (&reqlock);
741
742	errno = 0; /* strictly unnecessary */
743
744	if (!req->cancelled)
745	switch (req->type)
746	{
747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
749
750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
751	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
752
753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
756
757	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
758	case REQ_CLOSE: req->result = close (req->fd); break;
759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
764
765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
766	case REQ_FSYNC: req->result = fsync (req->fd); break;
767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
768
769	case REQ_SLEEP:
770	{
771	struct timeval tv;
772
773	tv.tv_sec = req->fd;
774	tv.tv_usec = req->fd2;
775
776	req->result = select (0, 0, 0, 0, &tv);
777	}
778
779	case REQ_QUIT:
780	break;
781
782	default:
783	req->result = ENOSYS;
784	break;
785	}
786
787	req->errorno = errno;
788
789	pthread_mutex_lock (&reslock);
790
791	req->next = 0;
792
793	if (rese)
794	{
795	rese->next = req;
796	rese = req;
797	}
798	else
799	{
800	rese = ress = req;
801
802	/* write a dummy byte to the pipe so fh becomes ready */
803	write (respipe [1], &respipe, 1);
804	}
805
806	pthread_mutex_unlock (&reslock);
807	}
808	while (type != REQ_QUIT);
809
810	return 0;
811	}
812
813	/*****************************************************************************/
814
815	static void atfork_prepare (void)
816	{
817	pthread_mutex_lock (&reqlock);
818	pthread_mutex_lock (&reslock);
819	#if !HAVE_PREADWRITE
820	pthread_mutex_lock (&preadwritelock);
821	#endif
822	#if !HAVE_READDIR_R
823	pthread_mutex_lock (&readdirlock);
824	#endif
825	}
826
827	static void atfork_parent (void)
828	{
829	#if !HAVE_READDIR_R
830	pthread_mutex_unlock (&readdirlock);
831	#endif
832	#if !HAVE_PREADWRITE
833	pthread_mutex_unlock (&preadwritelock);
834	#endif
835	pthread_mutex_unlock (&reslock);
836	pthread_mutex_unlock (&reqlock);
837	}
838
839	static void atfork_child (void)
840	{
841	aio_req prv;
842
843	started = 0;
844
845	while (reqs)
846	{
847	prv = reqs;
848	reqs = prv->next;
849	req_free (prv);
850	}
851
852	reqs = reqe = 0;
853
854	while (ress)
855	{
856	prv = ress;
857	ress = prv->next;
858	req_free (prv);
859	}
860
861	ress = rese = 0;
862
863	close (respipe [0]);
864	close (respipe [1]);
865	create_pipe ();
866
867	atfork_parent ();
868	}	625	}
869		626
870	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
871	aio_req req; \	629	aio_req req; \
		630	int req_pri = next_pri; \
		631	next_pri = EIO_PRI_DEFAULT; \
872	\	632	\
873	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
874	croak ("callback must be undef or of reference type"); \
875	\	634	\
876	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
877	if (!req) \	636	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
879	\	638	\
880	req->callback = newSVsv (callback)	639	req->callback = SvREFCNT_inc (cb_cv); \
		640	req->pri = req_pri
881		641
882	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
883	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
884	\	646	\
885	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
886	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
887		649
888	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
889		651
890	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
891		653
892	BOOT:	654	BOOT:
893	{	655	{
		656	static const struct {
		657	const char *name;
		658	IV iv;
		659	} *civ, const_iv[] = {
		660	# define const_niv(name, value) { # name, (IV) value },
		661	# define const_iv(name) { # name, (IV) name },
		662	# define const_eio(name) { # name, (IV) EIO_ ## name },
		663	const_iv (EXDEV)
		664	const_iv (ENOSYS)
		665	const_iv (O_RDONLY)
		666	const_iv (O_WRONLY)
		667	const_iv (O_RDWR)
		668	const_iv (O_CREAT)
		669	const_iv (O_TRUNC)
		670	const_iv (O_EXCL)
		671	const_iv (O_APPEND)
		672	#ifndef _WIN32
		673	const_iv (S_IFIFO)
		674	#endif
		675	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		676	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		677	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		678	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		679	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		680	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		681
		682	const_iv (ST_RDONLY)
		683	const_iv (ST_NOSUID)
		684	const_iv (ST_NODEV)
		685	const_iv (ST_NOEXEC)
		686	const_iv (ST_SYNCHRONOUS)
		687	const_iv (ST_MANDLOCK)
		688	const_iv (ST_WRITE)
		689	const_iv (ST_APPEND)
		690	const_iv (ST_IMMUTABLE)
		691	const_iv (ST_NOATIME)
		692	const_iv (ST_NODIRATIME)
		693	const_iv (ST_RELATIME)
		694
		695	const_iv (PROT_EXEC)
		696	const_iv (PROT_NONE)
		697	const_iv (PROT_READ)
		698	const_iv (PROT_WRITE)
		699
		700	/*const_iv (MAP_FIXED)*/
		701	const_iv (MAP_PRIVATE)
		702	const_iv (MAP_SHARED)
		703	const_iv (MAP_ANONYMOUS)
		704
		705	/* linuxish */
		706	const_iv (MAP_HUGETLB)
		707	const_iv (MAP_LOCKED)
		708	const_iv (MAP_NORESERVE)
		709	const_iv (MAP_POPULATE)
		710	const_iv (MAP_NONBLOCK)
		711
		712	const_iv (MCL_FUTURE)
		713	const_iv (MCL_CURRENT)
		714
		715	const_eio (MS_ASYNC)
		716	const_eio (MS_INVALIDATE)
		717	const_eio (MS_SYNC)
		718
		719	const_eio (MT_MODIFY)
		720
		721	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		722	const_eio (SYNC_FILE_RANGE_WRITE)
		723	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		724
		725	const_eio (READDIR_DENTS)
		726	const_eio (READDIR_DIRS_FIRST)
		727	const_eio (READDIR_STAT_ORDER)
		728	const_eio (READDIR_FOUND_UNKNOWN)
		729
		730	const_eio (DT_UNKNOWN)
		731	const_eio (DT_FIFO)
		732	const_eio (DT_CHR)
		733	const_eio (DT_DIR)
		734	const_eio (DT_BLK)
		735	const_eio (DT_REG)
		736	const_eio (DT_LNK)
		737	const_eio (DT_SOCK)
		738	const_eio (DT_WHT)
		739	};
		740
894	HV *stash = gv_stashpv ("IO::AIO", 1);	741	aio_stash = gv_stashpv ("IO::AIO" , 1);
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	742	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	743	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
898		744
		745	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		746	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		747
		748	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		749
899	create_pipe ();	750	create_respipe ();
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
901	}
902		751
		752	if (eio_init (want_poll, done_poll) < 0)
		753	croak ("IO::AIO: unable to initialise eio library");
		754
		755	/* atfork child called in fifo order, so before eio's handler */
		756	X_THREAD_ATFORK (0, 0, atfork_child);
		757	}
		758
903	void	759	void
904	min_parallel (nthreads)	760	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	761	PROTOTYPE: $
		762	CODE:
		763	eio_set_max_poll_reqs (nreqs);
907		764
908	void	765	void
909	max_parallel (nthreads)	766	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	767	PROTOTYPE: $
912
913	int
914	max_outstanding (nreqs)
915	int nreqs
916	PROTOTYPE: $
917	CODE:	768	CODE:
918	RETVAL = max_outstanding;	769	eio_set_max_poll_time (nseconds);
		770
		771	void
		772	min_parallel (int nthreads)
		773	PROTOTYPE: $
		774	CODE:
		775	eio_set_min_parallel (nthreads);
		776
		777	void
		778	max_parallel (int nthreads)
		779	PROTOTYPE: $
		780	CODE:
		781	eio_set_max_parallel (nthreads);
		782
		783	void
		784	max_idle (int nthreads)
		785	PROTOTYPE: $
		786	CODE:
		787	eio_set_max_idle (nthreads);
		788
		789	void
		790	max_outstanding (int maxreqs)
		791	PROTOTYPE: $
		792	CODE:
919	max_outstanding = nreqs;	793	max_outstanding = maxreqs;
920		794
921	void	795	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	796	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
923	SV * pathname
924	int flags
925	int mode
926	SV * callback
927	PROTOTYPE: $$$;$	797	PROTOTYPE: $$$;$
928	PPCODE:	798	PPCODE:
929	{	799	{
930	dREQ;	800	dREQ;
931		801
932	req->type = REQ_OPEN;	802	req->type = EIO_OPEN;
933	req->data = newSVsv (pathname);	803	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	804	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	805	req->int1 = flags;
936	req->mode = mode;	806	req->int2 = mode;
937		807
938	REQ_SEND;	808	REQ_SEND;
939	}	809	}
940		810
941	void	811	void
942	aio_close (fh,callback=&PL_sv_undef)	812	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
943	SV * fh
944	SV * callback
945	PROTOTYPE: $;$	813	PROTOTYPE: $;$
946	ALIAS:	814	ALIAS:
947	aio_close = REQ_CLOSE
948	aio_fsync = REQ_FSYNC	815	aio_fsync = EIO_FSYNC
949	aio_fdatasync = REQ_FDATASYNC	816	aio_fdatasync = EIO_FDATASYNC
950	PPCODE:	817	PPCODE:
951	{	818	{
		819	int fd = s_fileno_croak (fh, 0);
952	dREQ;	820	dREQ;
953		821
954	req->type = ix;	822	req->type = ix;
955	req->fh = newSVsv (fh);	823	req->sv1 = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	824	req->int1 = fd;
957		825
958	REQ_SEND (req);	826	REQ_SEND (req);
959	}	827	}
960		828
961	void	829	void
		830	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		831	PROTOTYPE: $$$$;$
		832	PPCODE:
		833	{
		834	int fd = s_fileno_croak (fh, 0);
		835	dREQ;
		836
		837	req->type = EIO_SYNC_FILE_RANGE;
		838	req->sv1 = newSVsv (fh);
		839	req->int1 = fd;
		840	req->offs = offset;
		841	req->size = nbytes;
		842	req->int2 = flags;
		843
		844	REQ_SEND (req);
		845	}
		846
		847	void
		848	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $;$
		850	PPCODE:
		851	{
		852	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	if (close_pipe < 0)
		857	{
		858	int pipefd [2];
		859
		860	if (pipe (pipefd) < 0
		861	|| close (pipefd [1]) < 0
		862	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		863	abort (); /*D*/
		864
		865	close_pipe = pipefd [0];
		866	}
		867
		868	req->type = EIO_DUP2;
		869	req->int1 = close_pipe;
		870	req->sv2 = newSVsv (fh);
		871	req->int2 = fd;
		872
		873	REQ_SEND (req);
		874	}
		875
		876	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	877	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
963	SV * fh
964	UV offset
965	UV length
966	SV * data
967	UV dataoffset
968	SV * callback
969	ALIAS:	878	ALIAS:
970	aio_read = REQ_READ	879	aio_read = EIO_READ
971	aio_write = REQ_WRITE	880	aio_write = EIO_WRITE
972	PROTOTYPE: $$$$$;$	881	PROTOTYPE: $$$$$;$
973	PPCODE:	882	PPCODE:
974	{	883	{
975	aio_req req;
976	STRLEN svlen;	884	STRLEN svlen;
		885	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
977	char *svptr = SvPVbyte (data, svlen);	886	char *svptr = SvPVbyte (data, svlen);
978		887	UV len = SvUV (length);
979	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);
981		888
982	if (dataoffset < 0)	889	if (dataoffset < 0)
983	dataoffset += svlen;	890	dataoffset += svlen;
984		891
985	if (dataoffset < 0 || dataoffset > svlen)	892	if (dataoffset < 0 || dataoffset > svlen)
986	croak ("data offset outside of string");	893	croak ("dataoffset outside of data scalar");
987		894
988	if (ix == REQ_WRITE)	895	if (ix == EIO_WRITE)
989	{	896	{
990	/* write: check length and adjust. */	897	/* write: check length and adjust. */
991	if (length < 0 || length + dataoffset > svlen)	898	if (!SvOK (length) || len + dataoffset > svlen)
992	length = svlen - dataoffset;	899	len = svlen - dataoffset;
993	}	900	}
994	else	901	else
995	{	902	{
996	/* read: grow scalar as necessary */	903	/* read: check type and grow scalar as necessary */
		904	SvUPGRADE (data, SVt_PV);
997	svptr = SvGROW (data, length + dataoffset);	905	svptr = SvGROW (data, len + dataoffset + 1);
998	}	906	}
999
1000	if (length < 0)
1001	croak ("length must not be negative");
1002		907
1003	{	908	{
1004	dREQ;	909	dREQ;
1005		910
1006	req->type = ix;	911	req->type = ix;
1007	req->fh = newSVsv (fh);	912	req->sv1 = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	913	req->int1 = fd;
1009	: IoOFP (sv_2io (fh)));	914	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1010	req->offset = offset;	915	req->size = len;
1011	req->length = length;
1012	req->data = SvREFCNT_inc (data);	916	req->sv2 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	917	req->ptr2 = (char *)svptr + dataoffset;
		918	req->stroffset = dataoffset;
1014		919
1015	if (!SvREADONLY (data))	920	if (!SvREADONLY (data))
1016	{	921	{
1017	SvREADONLY_on (data);	922	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	923	req->flags |= FLAG_SV2_RO_OFF;
1019	}	924	}
1020		925
1021	REQ_SEND;	926	REQ_SEND;
1022	}	927	}
1023	}	928	}
1024		929
1025	void	930	void
		931	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		932	PROTOTYPE: $$;$
		933	PPCODE:
		934	{
		935	SV *data;
		936	dREQ;
		937
		938	req->type = EIO_READLINK;
		939	req->sv1 = newSVsv (path);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941
		942	REQ_SEND;
		943	}
		944
		945	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	946	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1027	SV * out_fh
1028	SV * in_fh
1029	UV in_offset
1030	UV length
1031	SV * callback
1032	PROTOTYPE: $$$$;$	947	PROTOTYPE: $$$$;$
1033	PPCODE:	948	PPCODE:
1034	{	949	{
		950	int ifd = s_fileno_croak (in_fh , 0);
		951	int ofd = s_fileno_croak (out_fh, 1);
1035	dREQ;	952	dREQ;
1036		953
1037	req->type = REQ_SENDFILE;	954	req->type = EIO_SENDFILE;
1038	req->fh = newSVsv (out_fh);	955	req->sv1 = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	956	req->int1 = ofd;
1040	req->fh2 = newSVsv (in_fh);	957	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	958	req->int2 = ifd;
1042	req->offset = in_offset;	959	req->offs = in_offset;
1043	req->length = length;	960	req->size = length;
1044		961
1045	REQ_SEND;	962	REQ_SEND;
1046	}	963	}
1047		964
1048	void	965	void
1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	966	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1050	SV * fh
1051	UV offset
1052	IV length
1053	SV * callback
1054	PROTOTYPE: $$$;$	967	PROTOTYPE: $$$;$
1055	PPCODE:	968	PPCODE:
1056	{	969	{
		970	int fd = s_fileno_croak (fh, 0);
1057	dREQ;	971	dREQ;
1058		972
1059	req->type = REQ_READAHEAD;	973	req->type = EIO_READAHEAD;
1060	req->fh = newSVsv (fh);	974	req->sv1 = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	975	req->int1 = fd;
1062	req->offset = offset;	976	req->offs = offset;
1063	req->length = length;	977	req->size = length;
1064		978
1065	REQ_SEND;	979	REQ_SEND;
1066	}	980	}
1067		981
1068	void	982	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	983	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1070	SV * fh_or_path
1071	SV * callback
1072	ALIAS:	984	ALIAS:
1073	aio_stat = REQ_STAT	985	aio_stat = EIO_STAT
1074	aio_lstat = REQ_LSTAT	986	aio_lstat = EIO_LSTAT
		987	aio_statvfs = EIO_STATVFS
1075	PPCODE:	988	PPCODE:
1076	{	989	{
1077	dREQ;	990	dREQ;
1078		991
1079	New (0, req->statdata, 1, Stat_t);	992	req->sv1 = newSVsv (fh_or_path);
1080	if (!req->statdata)
1081	{
1082	req_free (req);
1083	croak ("out of memory during aio_req->statdata allocation");
1084	}
1085		993
1086	if (SvPOK (fh_or_path))	994	if (SvPOK (req->sv1))
1087	{	995	{
1088	req->type = ix;	996	req->type = ix;
1089	req->data = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	997	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	998	}
1092	else	999	else
1093	{	1000	{
1094	req->type = REQ_FSTAT;	1001	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1095	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1002	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	1003	}
1098		1004
1099	REQ_SEND;	1005	REQ_SEND;
1100	}	1006	}
1101		1007
1102	void	1008	void
		1009	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1010	PPCODE:
		1011	{
		1012	dREQ;
		1013
		1014	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1015	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1016	req->sv1 = newSVsv (fh_or_path);
		1017
		1018	if (SvPOK (req->sv1))
		1019	{
		1020	req->type = EIO_UTIME;
		1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1022	}
		1023	else
		1024	{
		1025	req->type = EIO_FUTIME;
		1026	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1027	}
		1028
		1029	REQ_SEND;
		1030	}
		1031
		1032	void
		1033	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1034	PPCODE:
		1035	{
		1036	dREQ;
		1037
		1038	req->sv1 = newSVsv (fh_or_path);
		1039	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1040
		1041	if (SvPOK (req->sv1))
		1042	{
		1043	req->type = EIO_TRUNCATE;
		1044	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1045	}
		1046	else
		1047	{
		1048	req->type = EIO_FTRUNCATE;
		1049	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1050	}
		1051
		1052	REQ_SEND;
		1053	}
		1054
		1055	void
		1056	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1057	ALIAS:
		1058	aio_chmod = EIO_CHMOD
		1059	aio_mkdir = EIO_MKDIR
		1060	PPCODE:
		1061	{
		1062	dREQ;
		1063
		1064	req->int2 = mode;
		1065	req->sv1 = newSVsv (fh_or_path);
		1066
		1067	if (SvPOK (req->sv1))
		1068	{
		1069	req->type = ix;
		1070	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1071	}
		1072	else
		1073	{
		1074	req->type = EIO_FCHMOD;
		1075	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1076	}
		1077
		1078	REQ_SEND;
		1079	}
		1080
		1081	void
		1082	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1083	PPCODE:
		1084	{
		1085	dREQ;
		1086
		1087	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1088	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1089	req->sv1 = newSVsv (fh_or_path);
		1090
		1091	if (SvPOK (req->sv1))
		1092	{
		1093	req->type = EIO_CHOWN;
		1094	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1095	}
		1096	else
		1097	{
		1098	req->type = EIO_FCHOWN;
		1099	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1100	}
		1101
		1102	REQ_SEND;
		1103	}
		1104
		1105	void
		1106	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1107	PPCODE:
		1108	{
		1109	dREQ;
		1110
		1111	req->type = EIO_READDIR;
		1112	req->sv1 = newSVsv (pathname);
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1115
		1116	if (flags & EIO_READDIR_DENTS)
		1117	req->int1 |= EIO_READDIR_CUSTOM2;
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	1123	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1104	SV * pathname
1105	SV * callback
1106	ALIAS:	1124	ALIAS:
1107	aio_unlink = REQ_UNLINK	1125	aio_unlink = EIO_UNLINK
1108	aio_rmdir = REQ_RMDIR	1126	aio_rmdir = EIO_RMDIR
1109	aio_readdir = REQ_READDIR	1127	aio_readdir = EIO_READDIR
1110	PPCODE:	1128	PPCODE:
1111	{	1129	{
1112	dREQ;	1130	dREQ;
1113		1131
1114	req->type = ix;	1132	req->type = ix;
1115	req->data = newSVsv (pathname);	1133	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	1134	req->ptr1 = SvPVbyte_nolen (req->sv1);
1117		1135
1118	REQ_SEND;	1136	REQ_SEND;
1119	}	1137	}
1120		1138
1121	void	1139	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1140	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1123	SV * oldpath
1124	SV * newpath
1125	SV * callback
1126	ALIAS:	1141	ALIAS:
1127	aio_link = REQ_LINK	1142	aio_link = EIO_LINK
1128	aio_symlink = REQ_SYMLINK	1143	aio_symlink = EIO_SYMLINK
1129	aio_rename = REQ_RENAME	1144	aio_rename = EIO_RENAME
1130	PPCODE:	1145	PPCODE:
1131	{	1146	{
1132	dREQ;	1147	dREQ;
1133		1148
1134	req->type = ix;	1149	req->type = ix;
1135	req->fh = newSVsv (oldpath);	1150	req->sv1 = newSVsv (oldpath);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	1151	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	req->data = newSVsv (newpath);	1152	req->sv2 = newSVsv (newpath);
1138	req->dataptr = SvPVbyte_nolen (req->data);	1153	req->ptr2 = SvPVbyte_nolen (req->sv2);
1139		1154
1140	REQ_SEND;	1155	REQ_SEND;
1141	}	1156	}
1142		1157
1143	void	1158	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	1159	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1145	double delay
1146	SV * callback
1147	PPCODE:	1160	PPCODE:
1148	{	1161	{
1149	dREQ;	1162	dREQ;
1150		1163
1151	req->type = REQ_SLEEP;	1164	req->type = EIO_MKNOD;
1152	req->fd = delay < 0. ? 0 : delay;	1165	req->sv1 = newSVsv (pathname);
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
1154		1167	req->int2 = (mode_t)mode;
		1168	req->offs = dev;
		1169
1155	REQ_SEND;	1170	REQ_SEND;
1156	}	1171	}
1157		1172
1158	void	1173	void
		1174	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1175	ALIAS:
		1176	aio_mtouch = EIO_MTOUCH
		1177	aio_msync = EIO_MSYNC
		1178	PROTOTYPE: $$$$;$
		1179	PPCODE:
		1180	{
		1181	STRLEN svlen;
		1182	UV len = SvUV (length);
		1183	char *svptr = SvPVbyte (data, svlen);
		1184
		1185	if (offset < 0)
		1186	offset += svlen;
		1187
		1188	if (offset < 0 || offset > svlen)
		1189	croak ("offset outside of scalar");
		1190
		1191	if (!SvOK (length) || len + offset > svlen)
		1192	len = svlen - offset;
		1193
		1194	{
		1195	dREQ;
		1196
		1197	req->type = ix;
		1198	req->size = len;
		1199	req->sv2 = SvREFCNT_inc (data);
		1200	req->ptr2 = (char *)svptr + offset;
		1201	req->int1 = flags;
		1202
		1203	REQ_SEND;
		1204	}
		1205	}
		1206
		1207	void
		1208	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1209	PPCODE:
		1210	{
		1211	dREQ;
		1212
		1213	req->type = EIO_BUSY;
		1214	req->nv1 = delay < 0. ? 0. : delay;
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
1159	aio_group (callback=&PL_sv_undef)	1220	aio_group (SV *callback=&PL_sv_undef)
1160	SV * callback
1161	PROTOTYPE: ;$	1221	PROTOTYPE: ;$
1162	PPCODE:	1222	PPCODE:
1163	{	1223	{
1164	dREQ;	1224	dREQ;
		1225
1165	req->type = REQ_GROUP;	1226	req->type = EIO_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		1227
1169	req_send (req);	1228	req_submit (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1229	XPUSHs (req_sv (req, aio_grp_stash));
1171	}	1230	}
		1231
		1232	void
		1233	aio_nop (SV *callback=&PL_sv_undef)
		1234	ALIAS:
		1235	aio_nop = EIO_NOP
		1236	aio_sync = EIO_SYNC
		1237	PPCODE:
		1238	{
		1239	dREQ;
		1240
		1241	req->type = ix;
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	int
		1247	aioreq_pri (int pri = 0)
		1248	PROTOTYPE: ;$
		1249	CODE:
		1250	RETVAL = next_pri;
		1251	if (items > 0)
		1252	{
		1253	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1254	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1255	next_pri = pri;
		1256	}
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	void
		1261	aioreq_nice (int nice = 0)
		1262	CODE:
		1263	nice = next_pri - nice;
		1264	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1265	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1266	next_pri = nice;
1172		1267
1173	void	1268	void
1174	flush ()	1269	flush ()
1175	PROTOTYPE:	1270	PROTOTYPE:
1176	CODE:	1271	CODE:
1177	while (nreqs)	1272	while (eio_nreqs ())
1178	{	1273	{
1179	poll_wait ();	1274	poll_wait ();
1180	poll_cb ();	1275	poll_cb ();
1181	}	1276	}
1182		1277
1183	void	1278	int
1184	poll()	1279	poll()
1185	PROTOTYPE:	1280	PROTOTYPE:
1186	CODE:	1281	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	1282	poll_wait ();
1190	poll_cb ();	1283	RETVAL = poll_cb ();
1191	}	1284	OUTPUT:
		1285	RETVAL
1192		1286
1193	int	1287	int
1194	poll_fileno()	1288	poll_fileno()
1195	PROTOTYPE:	1289	PROTOTYPE:
1196	CODE:	1290	CODE:
1197	RETVAL = respipe [0];	1291	RETVAL = s_epipe_fd (&respipe);
1198	OUTPUT:	1292	OUTPUT:
1199	RETVAL	1293	RETVAL
1200		1294
1201	int	1295	int
1202	poll_cb(...)	1296	poll_cb(...)
…		…
1208		1302
1209	void	1303	void
1210	poll_wait()	1304	poll_wait()
1211	PROTOTYPE:	1305	PROTOTYPE:
1212	CODE:	1306	CODE:
1213	if (nreqs)
1214	poll_wait ();	1307	poll_wait ();
1215		1308
1216	int	1309	int
1217	nreqs()	1310	nreqs()
1218	PROTOTYPE:	1311	PROTOTYPE:
1219	CODE:	1312	CODE:
1220	RETVAL = nreqs;	1313	RETVAL = eio_nreqs ();
1221	OUTPUT:	1314	OUTPUT:
1222	RETVAL	1315	RETVAL
1223		1316
		1317	int
		1318	nready()
		1319	PROTOTYPE:
		1320	CODE:
		1321	RETVAL = eio_nready ();
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
		1326	npending()
		1327	PROTOTYPE:
		1328	CODE:
		1329	RETVAL = eio_npending ();
		1330	OUTPUT:
		1331	RETVAL
		1332
		1333	int
		1334	nthreads()
		1335	PROTOTYPE:
		1336	CODE:
		1337	RETVAL = eio_nthreads ();
		1338	OUTPUT:
		1339	RETVAL
		1340
		1341	int
		1342	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1343	PROTOTYPE: $$$$
		1344	CODE:
		1345	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1346	RETVAL = posix_fadvise (fh, offset, length, advice);
		1347	#else
		1348	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1349	#endif
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	ssize_t
		1354	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1355	PROTOTYPE: $$$$
		1356	CODE:
		1357	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	void
		1362	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1363	PROTOTYPE: $$$$$;$
		1364	PPCODE:
		1365	sv_unmagic (scalar, MMAP_MAGIC);
		1366	{
		1367	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1368	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1369	if (addr == (void *)-1)
		1370	XSRETURN_NO;
		1371
		1372	/* we store the length in mg_obj, as namlen is I32 :/ */
		1373	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1374	->mg_obj = (SV *)length;
		1375
		1376	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1377	if (!(prot & PROT_WRITE))
		1378	SvREADONLY_on (scalar);
		1379
		1380	SvPVX (scalar) = (char *)addr;
		1381	SvCUR_set (scalar, length);
		1382	SvLEN_set (scalar, 0);
		1383	SvPOK_only (scalar);
		1384
		1385	XSRETURN_YES;
		1386	}
		1387
		1388	void
		1389	munmap (SV *scalar)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	sv_unmagic (scalar, MMAP_MAGIC);
		1393
		1394	int
		1395	mlockall (int flags)
		1396	PROTOTYPE: $
		1397	CODE:
		1398	#if _POSIX_MEMLOCK
		1399	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1400	extern int mallopt (int, int);
		1401	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1402	#endif
		1403	mlockall (flags);
		1404	#else
		1405	RETVAL = -1;
		1406	errno = ENOSYS;
		1407	#endif
		1408	OUTPUT:
		1409	RETVAL
		1410
		1411	int
		1412	munlockall ()
		1413	PROTOTYPE:
		1414	CODE:
		1415	#if _POSIX_MEMLOCK
		1416	munlockall ();
		1417	#else
		1418	RETVAL = -1;
		1419	errno = ENOSYS;
		1420	#endif
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void _on_next_submit (SV *cb)
		1425	CODE:
		1426	SvREFCNT_dec (on_next_submit);
		1427	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1428
1224	PROTOTYPES: DISABLE	1429	PROTOTYPES: DISABLE
1225		1430
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1431	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227		1432
1228	void	1433	void
1229	cancel (aio_req_ornot req)	1434	cancel (aio_req_ornot req)
1230	PROTOTYPE:
1231	CODE:	1435	CODE:
1232	req_cancel (req);	1436	eio_cancel (req);
		1437
		1438	void
		1439	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1440	PPCODE:
		1441	{
		1442	if (GIMME_V != G_VOID)
		1443	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1444
		1445	if (items > 1)
		1446	{
		1447	SV *cb_cv =get_cb (callback);
		1448
		1449	SvREFCNT_dec (req->callback);
		1450	req->callback = SvREFCNT_inc (cb_cv);
		1451	}
		1452	}
1233		1453
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1455
1236	void	1456	void
1237	add (aio_req grp, ...)	1457	add (aio_req grp, ...)
1238	PPCODE:	1458	PPCODE:
1239	{	1459	{
1240	int i;	1460	int i;
1241		1461
		1462	if (grp->int1 == 2)
		1463	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1464
1242	for (i = 1; i < items; ++i )	1465	for (i = 1; i < items; ++i )
1243	{	1466	{
		1467	aio_req req;
		1468
1244	if (GIMME_V != G_VOID)	1469	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1470	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1471
1247	aio_req req = SvAIO_REQ (ST (i));	1472	req = SvAIO_REQ (ST (i));
1248		1473
1249	if (req)	1474	if (req)
1250	{	1475	eio_grp_add (grp, req);
1251	req->grp_prev = grp;
1252	req->grp_next = grp->grp_next;
1253	grp->grp_next->grp_prev = req;
1254	grp->grp_next = req;
1255
1256	req->grp = grp;
1257	}
1258	}	1476	}
1259	}	1477	}
1260		1478
1261	void	1479	void
		1480	cancel_subs (aio_req_ornot req)
		1481	CODE:
		1482	req_cancel_subs (req);
		1483
		1484	void
1262	result (aio_req grp, ...)	1485	result (aio_req grp, ...)
1263	CODE:	1486	CODE:
1264	{	1487	{
1265	int i;	1488	int i;
1266	AV *av = newAV ();	1489	AV *av;
1267		1490
1268	if (grp->data)	1491	grp->errorno = errno;
1269	SvREFCNT_dec (grp->data);
1270		1492
		1493	av = newAV ();
		1494	av_extend (av, items - 1);
		1495
1271	for (i = 1; i < items; ++i )	1496	for (i = 1; i < items; ++i )
1272	av_push (av, newSVsv (ST (i)));	1497	av_push (av, newSVsv (ST (i)));
1273		1498
		1499	SvREFCNT_dec (grp->sv1);
1274	grp->data = (SV *)av;	1500	grp->sv1 = (SV *)av;
1275	}	1501	}
1276		1502
		1503	void
		1504	errno (aio_req grp, int errorno = errno)
		1505	CODE:
		1506	grp->errorno = errorno;
		1507
		1508	void
		1509	limit (aio_req grp, int limit)
		1510	CODE:
		1511	eio_grp_limit (grp, limit);
		1512
		1513	void
		1514	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1515	CODE:
		1516	{
		1517	SvREFCNT_dec (grp->sv2);
		1518	grp->sv2 = newSVsv (callback);
		1519	grp->feed = aio_grp_feed;
		1520
		1521	if (grp->int2 <= 0)
		1522	grp->int2 = 2;
		1523
		1524	eio_grp_limit (grp, grp->int2);
		1525	}
		1526

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