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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.49 by root, Sun Oct 22 13:33:28 2006 UTC vs.
Revision 1.163 by root, Sun Jan 10 23:44:02 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 *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
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	{
111	if (!req->self)	248	if (!req->self)
112	{	249	{
113	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
114	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
115	}	252	}
116		253
117	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
118	}	255	}
119		256
120	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
121	{	258	{
122	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")))
123	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
124		266
125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
126		268
127	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
128	}	270	}
129		271
130	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
131	{	273	{
132	while (grp->length < grp->fd2)	274	if (grp->sv2 && SvOK (grp->sv2))
133	{	275	{
134	int old_len = grp->length;	276	dSP;
135		277
136	if (grp->fh2 && SvOK (grp->fh2))	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;
		287	}
		288	}
		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
		307	static int req_invoke (eio_req *req)
		308	{
		309	dSP;
		310
		311	if (req->flags & FLAG_SV2_RO_OFF)
		312	SvREADONLY_off (req->sv2);
		313
		314	if (!EIO_CANCELLED (req) && req->callback)
		315	{
		316	ENTER;
		317	SAVETMPS;
		318	PUSHMARK (SP);
		319	EXTEND (SP, 1);
		320
		321	switch (req->type)
137	{	322	{
138	dSP;	323	case EIO_READDIR:
		324	{
		325	SV *rv = &PL_sv_undef;
139		326
140	ENTER;	327	if (req->result >= 0)
141	SAVETMPS;	328	{
142	PUSHMARK (SP);	329	int i;
143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	330	char *names = (char *)req->ptr2;
144	PUTBACK;	331	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
145	call_sv (grp->fh2, G_VOID | G_EVAL);	332	AV *av = newAV ();
146	SPAGAIN;	333
147	FREETMPS;	334	av_extend (av, req->result - 1);
148	LEAVE;	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);
		370	names += SvCUR (name) + 1;
		371	}
		372	}
		373
		374	rv = sv_2mortal (newRV_noinc ((SV *)av));
		375	}
		376
		377	PUSHs (rv);
		378
		379	if (req->int1 & EIO_READDIR_CUSTOM1)
		380	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		381	}
		382	break;
		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
		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;
149	}	495	}
150		496
151	/* stop if no progress has been made */	497	errno = req->errorno;
152	if (old_len == grp->length)	498
153	{	499	PUTBACK;
154	SvREFCNT_dec (grp->fh2);	500	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
155	grp->fh2 = 0;	501	SPAGAIN;
156	break;	502
157	}	503	FREETMPS;
		504	LEAVE;
		505
		506	PUTBACK;
158	}	507	}
159	}
160		508
161	static void poll_wait ()	509	return !!SvTRUE (ERRSV);
162	{
163	if (nreqs && !ress)
164	{
165	fd_set rfd;
166	FD_ZERO(&rfd);
167	FD_SET(respipe [0], &rfd);
168
169	select (respipe [0] + 1, &rfd, 0, 0, 0);
170	}
171	}	510	}
172		511
173	static void req_invoke (aio_req req)
174	{
175	dSP;
176	int errorno = errno;
177
178	if (req->cancelled || !SvOK (req->callback))
179	return;
180
181	errno = req->errorno;
182
183	ENTER;
184	SAVETMPS;
185	PUSHMARK (SP);
186	EXTEND (SP, 1);
187
188	switch (req->type)
189	{
190	case REQ_READDIR:
191	{
192	SV *rv = &PL_sv_undef;
193
194	if (req->result >= 0)
195	{
196	char *buf = req->data2ptr;
197	AV *av = newAV ();
198
199	while (req->result)
200	{
201	SV *sv = newSVpv (buf, 0);
202
203	av_push (av, sv);
204	buf += SvCUR (sv) + 1;
205	req->result--;
206	}
207
208	rv = sv_2mortal (newRV_noinc ((SV *)av));
209	}
210
211	PUSHs (rv);
212	}
213	break;
214
215	case REQ_OPEN:
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUSHs (sv_2mortal (newSViv (req->result)));
221	PUTBACK;
222	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
223	SPAGAIN;
224
225	fh = SvREFCNT_inc (POPs);
226
227	PUSHMARK (SP);
228	XPUSHs (sv_2mortal (fh));
229	}
230	break;
231
232	case REQ_GROUP:
233	req->fd = 2; /* mark group as finished */
234
235	if (req->data)
236	{
237	int i;
238	AV *av = (AV *)req->data;
239
240	EXTEND (SP, AvFILL (av) + 1);
241	for (i = 0; i <= AvFILL (av); ++i)
242	PUSHs (*av_fetch (av, i, 0));
243	}
244	break;
245
246	case REQ_SLEEP:
247	break;
248
249	default:
250	PUSHs (sv_2mortal (newSViv (req->result)));
251	break;
252	}
253
254
255	PUTBACK;
256	call_sv (req->callback, G_VOID | G_EVAL);
257	SPAGAIN;
258
259	if (SvTRUE (ERRSV))
260	{
261	req_free (req);
262	croak (0);
263	}
264
265	FREETMPS;
266	LEAVE;
267
268	errno = errorno;
269	}
270
271	static void req_free (aio_req req)	512	static void req_destroy (aio_req req)
272	{	513	{
273	if (req->grp)
274	{
275	aio_req grp = req->grp;
276
277	/* unlink request */
278	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
280
281	if (grp->grp_first == req)
282	grp->grp_first = req->grp_next;
283
284	--grp->length;
285
286	/* call feeder, if applicable */
287	aio_grp_feed (grp);
288
289	/* finish, if done */
290	if (!grp->length && grp->fd)
291	{
292	req_invoke (grp);
293	req_free (grp);
294	}
295	}
296
297	if (req->self)	514	if (req->self)
298	{	515	{
299	sv_unmagic (req->self, PERL_MAGIC_ext);	516	sv_unmagic (req->self, PERL_MAGIC_ext);
300	SvREFCNT_dec (req->self);	517	SvREFCNT_dec (req->self);
301	}	518	}
302		519
303	SvREFCNT_dec (req->data);
304	SvREFCNT_dec (req->fh);	520	SvREFCNT_dec (req->sv1);
305	SvREFCNT_dec (req->fh2);	521	SvREFCNT_dec (req->sv2);
306	SvREFCNT_dec (req->callback);	522	SvREFCNT_dec (req->callback);
307	Safefree (req->statdata);
308
309	if (req->type == REQ_READDIR && req->result >= 0)
310	free (req->data2ptr);
311		523
312	Safefree (req);	524	Safefree (req);
313	}	525	}
314		526
315	static void req_cancel (aio_req req)	527	static void req_cancel_subs (aio_req grp)
316	{	528	{
317	req->cancelled = 1;	529	aio_req sub;
318		530
319	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 ())
320	{	550	{
321	aio_req sub;	551	int size;
322		552
323	for (sub = req->grp_first; sub; sub = sub->grp_next)	553	X_LOCK (reslock);
324	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);
325	}	563	}
326	}	564	}
327		565
328	static int poll_cb ()	566	static int poll_cb (void)
329	{	567	{
330	dSP;
331	int count = 0;
332	int do_croak = 0;
333	aio_req req;
334
335	for (;;)	568	for (;;)
336	{	569	{
337	pthread_mutex_lock (&reslock);	570	int res = eio_poll ();
338	req = ress;
339		571
340	if (req)	572	if (res > 0)
341	{
342	ress = req->next;
343
344	if (!ress)
345	{
346	/* read any signals sent by the worker threads */
347	char buf [32];
348	while (read (respipe [0], buf, 32) == 32)
349	;
350
351	rese = 0;
352	}
353	}
354
355	pthread_mutex_unlock (&reslock);
356
357	if (!req)
358	break;	573	croak (0);
359		574
360	nreqs--;	575	if (!max_outstanding || max_outstanding > eio_nreqs ())
		576	return res;
361		577
362	if (req->type == REQ_QUIT)	578	poll_wait ();
363	started--;
364	else if (req->type == REQ_GROUP && req->length)
365	{
366	req->fd = 1; /* mark request as delayed */
367	continue;
368	}
369	else
370	{
371	if (req->type == REQ_READ)
372	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
373
374	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
375	SvREADONLY_off (req->data);
376
377	if (req->statdata)
378	{
379	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
380	PL_laststatval = req->result;
381	PL_statcache = *(req->statdata);
382	}
383
384	req_invoke (req);
385
386	count++;
387	}
388
389	req_free (req);
390	}	579	}
391
392	return count;
393	}	580	}
394		581
395	static void *aio_proc(void *arg);
396
397	static void start_thread (void)	582	static void atfork_child (void)
398	{	583	{
399	sigset_t fullsigset, oldsigset;	584	create_respipe ();
400	pthread_t tid;
401	pthread_attr_t attr;
402
403	pthread_attr_init (&attr);
404	pthread_attr_setstacksize (&attr, STACKSIZE);
405	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
406
407	sigfillset (&fullsigset);
408	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
409
410	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
411	started++;
412
413	sigprocmask (SIG_SETMASK, &oldsigset, 0);
414	}
415
416	static void req_send (aio_req req)
417	{
418	while (started < wanted && nreqs >= started)
419	start_thread ();
420
421	nreqs++;
422
423	pthread_mutex_lock (&reqlock);
424
425	req->next = 0;
426
427	if (reqe)
428	{
429	reqe->next = req;
430	reqe = req;
431	}
432	else
433	reqe = reqs = req;
434
435	pthread_cond_signal (&reqwait);
436	pthread_mutex_unlock (&reqlock);
437
438	if (nreqs > max_outstanding)
439	for (;;)
440	{
441	poll_cb ();
442
443	if (nreqs <= max_outstanding)
444	break;
445
446	poll_wait ();
447	}
448	}
449
450	static void end_thread (void)
451	{
452	aio_req req;
453	Newz (0, req, 1, aio_cb);
454	req->type = REQ_QUIT;
455
456	req_send (req);
457	}
458
459	static void min_parallel (int nthreads)
460	{
461	if (wanted < nthreads)
462	wanted = nthreads;
463	}
464
465	static void max_parallel (int nthreads)
466	{
467	int cur = started;
468
469	if (wanted > nthreads)
470	wanted = nthreads;
471
472	while (cur > wanted)
473	{
474	end_thread ();
475	cur--;
476	}
477
478	while (started > wanted)
479	{
480	poll_wait ();
481	poll_cb ();
482	}
483	}
484
485	static void create_pipe ()
486	{
487	if (pipe (respipe))
488	croak ("unable to initialize result pipe");
489
490	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
491	croak ("cannot set result pipe to nonblocking mode");
492
493	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
494	croak ("cannot set result pipe to nonblocking mode");
495	}	585	}
496		586
497	/*****************************************************************************/	587	/*****************************************************************************/
498	/* work around various missing functions */
499		588
500	#if !HAVE_PREADWRITE	589	#if !_POSIX_MAPPED_FILES
501	# define pread aio_pread	590	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
502	# define pwrite aio_pwrite	591	# define munmap(addr,length) (errno = ENOSYS, -1)
503
504	/*
505	* make our pread/pwrite safe against themselves, but not against
506	* normal read/write by using a mutex. slows down execution a lot,
507	* but that's your problem, not mine.
508	*/
509	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
510
511	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
512	{
513	ssize_t res;
514	off_t ooffset;
515
516	pthread_mutex_lock (&preadwritelock);
517	ooffset = lseek (fd, 0, SEEK_CUR);
518	lseek (fd, offset, SEEK_SET);
519	res = read (fd, buf, count);
520	lseek (fd, ooffset, SEEK_SET);
521	pthread_mutex_unlock (&preadwritelock);
522
523	return res;
524	}
525
526	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
527	{
528	ssize_t res;
529	off_t ooffset;
530
531	pthread_mutex_lock (&preadwritelock);
532	ooffset = lseek (fd, 0, SEEK_CUR);
533	lseek (fd, offset, SEEK_SET);
534	res = write (fd, buf, count);
535	lseek (fd, offset, SEEK_SET);
536	pthread_mutex_unlock (&preadwritelock);
537
538	return res;
539	}
540	#endif
541
542	#if !HAVE_FDATASYNC
543	# define fdatasync fsync
544	#endif
545
546	#if !HAVE_READAHEAD
547	# define readahead aio_readahead
548
549	static ssize_t readahead (int fd, off_t offset, size_t count)
550	{
551	char readahead_buf[4096];
552
553	while (count > 0)
554	{
555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
556
557	pread (fd, readahead_buf, len, offset);
558	offset += len;
559	count -= len;
560	}
561
562	errno = 0;
563	}
564	#endif
565
566	#if !HAVE_READDIR_R
567	# define readdir_r aio_readdir_r
568
569	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
570
571	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
572	{
573	struct dirent *e;
574	int errorno;
575
576	pthread_mutex_lock (&readdirlock);
577
578	e = readdir (dirp);
579	errorno = errno;
580
581	if (e)
582	{
583	*res = ent;
584	strcpy (ent->d_name, e->d_name);
585	}
586	else
587	*res = 0;
588
589	pthread_mutex_unlock (&readdirlock);
590
591	errno = errorno;
592	return e ? 0 : -1;
593	}
594	#endif
595
596	/* sendfile always needs emulation */
597	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
598	{
599	ssize_t res;
600
601	if (!count)
602	return 0;
603
604	#if HAVE_SENDFILE
605	# if __linux
606	res = sendfile (ofd, ifd, &offset, count);
607
608	# elif __freebsd
609	/*
610	* Of course, the freebsd sendfile is a dire hack with no thoughts
611	* wasted on making it similar to other I/O functions.
612	*/
613	{
614	off_t sbytes;
615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
616
617	if (res < 0 && sbytes)
618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
619	res = sbytes;
620	}
621
622	# elif __hpux
623	res = sendfile (ofd, ifd, offset, count, 0, 0);
624
625	# elif __solaris
626	{
627	struct sendfilevec vec;
628	size_t sbytes;
629
630	vec.sfv_fd = ifd;
631	vec.sfv_flag = 0;
632	vec.sfv_off = offset;
633	vec.sfv_len = count;
634
635	res = sendfilev (ofd, &vec, 1, &sbytes);
636
637	if (res < 0 && sbytes)
638	res = sbytes;
639	}
640
641	# endif	592	#endif
642	#else
643	res = -1;
644	errno = ENOSYS;
645	#endif
646		593
647	if (res < 0	594	#define MMAP_MAGIC PERL_MAGIC_ext
648	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
649	#if __solaris
650	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
651	#endif
652	)
653	)
654	{
655	/* emulate sendfile. this is a major pain in the ass */
656	char buf[4096];
657	res = 0;
658		595
659	while (count)	596	static int
660	{	597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
661	ssize_t cnt;
662
663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
664
665	if (cnt <= 0)
666	{
667	if (cnt && !res) res = -1;
668	break;
669	}
670
671	cnt = write (ofd, buf, cnt);
672
673	if (cnt <= 0)
674	{
675	if (cnt && !res) res = -1;
676	break;
677	}
678
679	offset += cnt;
680	res += cnt;
681	count -= cnt;
682	}
683	}
684
685	return res;
686	}
687
688	/* read a full directory */
689	static int scandir_ (const char *path, void **namesp)
690	{	598	{
691	DIR *dirp = opendir (path);	599	int old_errno = errno;
692	union	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
693	{
694	struct dirent d;
695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
696	} u;
697	struct dirent *entp;
698	char *name, *names;
699	int memlen = 4096;
700	int memofs = 0;
701	int res = 0;
702	int errorno;
703
704	if (!dirp)
705	return -1;
706
707	names = malloc (memlen);
708
709	for (;;)
710	{
711	errno = 0, readdir_r (dirp, &u.d, &entp);
712
713	if (!entp)
714	break;
715
716	name = entp->d_name;
717
718	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
719	{
720	int len = strlen (name) + 1;
721
722	res++;
723
724	while (memofs + len > memlen)
725	{
726	memlen *= 2;
727	names = realloc (names, memlen);
728	if (!names)
729	break;
730	}
731
732	memcpy (names + memofs, name, len);
733	memofs += len;
734	}
735	}
736
737	errorno = errno;	601	errno = old_errno;
738	closedir (dirp);
739		602
740	if (errorno)	603	mg->mg_obj = 0; /* just in case */
741	{
742	free (names);
743	errno = errorno;
744	res = -1;
745	}
746		604
747	*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
748	return res;	611	return 0;
749	}	612	}
		613
		614	static MGVTBL mmap_vtbl = {
		615	0, 0, 0, 0, mmap_free
		616	};
750		617
751	/*****************************************************************************/	618	/*****************************************************************************/
752		619
753	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
754	{	622	{
755	aio_req req;	623	SvGETMAGIC (cb_sv);
756	int type;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
757
758	do
759	{
760	pthread_mutex_lock (&reqlock);
761
762	for (;;)
763	{
764	req = reqs;
765
766	if (reqs)
767	{
768	reqs = reqs->next;
769	if (!reqs) reqe = 0;
770	}
771
772	if (req)
773	break;
774
775	pthread_cond_wait (&reqwait, &reqlock);
776	}
777
778	pthread_mutex_unlock (&reqlock);
779
780	errno = 0; /* strictly unnecessary */
781
782	if (!req->cancelled)
783	switch (req->type)
784	{
785	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
786	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
787
788	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
789	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
790
791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
794
795	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
796	case REQ_CLOSE: req->result = close (req->fd); break;
797	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
798	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
799	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
802
803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
804	case REQ_FSYNC: req->result = fsync (req->fd); break;
805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
806
807	case REQ_SLEEP:
808	{
809	struct timeval tv;
810
811	tv.tv_sec = req->fd;
812	tv.tv_usec = req->fd2;
813
814	req->result = select (0, 0, 0, 0, &tv);
815	}
816
817	case REQ_QUIT:
818	break;
819
820	default:
821	req->result = ENOSYS;
822	break;
823	}
824
825	req->errorno = errno;
826
827	pthread_mutex_lock (&reslock);
828
829	req->next = 0;
830
831	if (rese)
832	{
833	rese->next = req;
834	rese = req;
835	}
836	else
837	{
838	rese = ress = req;
839
840	/* write a dummy byte to the pipe so fh becomes ready */
841	write (respipe [1], &respipe, 1);
842	}
843
844	pthread_mutex_unlock (&reslock);
845	}
846	while (type != REQ_QUIT);
847
848	return 0;
849	}
850
851	/*****************************************************************************/
852
853	static void atfork_prepare (void)
854	{
855	pthread_mutex_lock (&reqlock);
856	pthread_mutex_lock (&reslock);
857	#if !HAVE_PREADWRITE
858	pthread_mutex_lock (&preadwritelock);
859	#endif
860	#if !HAVE_READDIR_R
861	pthread_mutex_lock (&readdirlock);
862	#endif
863	}
864
865	static void atfork_parent (void)
866	{
867	#if !HAVE_READDIR_R
868	pthread_mutex_unlock (&readdirlock);
869	#endif
870	#if !HAVE_PREADWRITE
871	pthread_mutex_unlock (&preadwritelock);
872	#endif
873	pthread_mutex_unlock (&reslock);
874	pthread_mutex_unlock (&reqlock);
875	}
876
877	static void atfork_child (void)
878	{
879	aio_req prv;
880
881	started = 0;
882
883	while (reqs)
884	{
885	prv = reqs;
886	reqs = prv->next;
887	req_free (prv);
888	}
889
890	reqs = reqe = 0;
891
892	while (ress)
893	{
894	prv = ress;
895	ress = prv->next;
896	req_free (prv);
897	}
898
899	ress = rese = 0;
900
901	close (respipe [0]);
902	close (respipe [1]);
903	create_pipe ();
904
905	atfork_parent ();
906	}	625	}
907		626
908	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
909	aio_req req; \	629	aio_req req; \
		630	int req_pri = next_pri; \
		631	next_pri = EIO_PRI_DEFAULT; \
910	\	632	\
911	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
912	croak ("callback must be undef or of reference type"); \
913	\	634	\
914	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
915	if (!req) \	636	if (!req) \
916	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
917	\	638	\
918	req->callback = newSVsv (callback)	639	req->callback = SvREFCNT_inc (cb_cv); \
		640	req->pri = req_pri
919		641
920	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
921	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
922	\	646	\
923	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
924	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
925		649
926	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
927		651
928	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
929		653
930	BOOT:	654	BOOT:
931	{	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_CREAT)
		668	const_iv (O_TRUNC)
		669	#ifndef _WIN32
		670	const_iv (S_IFIFO)
		671	#endif
		672	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		673	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		674	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		675	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		676	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		677	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		678
		679	const_iv (ST_RDONLY)
		680	const_iv (ST_NOSUID)
		681	const_iv (ST_NODEV)
		682	const_iv (ST_NOEXEC)
		683	const_iv (ST_SYNCHRONOUS)
		684	const_iv (ST_MANDLOCK)
		685	const_iv (ST_WRITE)
		686	const_iv (ST_APPEND)
		687	const_iv (ST_IMMUTABLE)
		688	const_iv (ST_NOATIME)
		689	const_iv (ST_NODIRATIME)
		690	const_iv (ST_RELATIME)
		691
		692	const_iv (PROT_EXEC)
		693	const_iv (PROT_NONE)
		694	const_iv (PROT_READ)
		695	const_iv (PROT_WRITE)
		696
		697	/*const_iv (MAP_FIXED)*/
		698	const_iv (MAP_PRIVATE)
		699	const_iv (MAP_SHARED)
		700	const_iv (MAP_ANONYMOUS)
		701
		702	/* linuxish */
		703	const_iv (MAP_HUGETLB)
		704	const_iv (MAP_LOCKED)
		705	const_iv (MAP_NORESERVE)
		706	const_iv (MAP_POPULATE)
		707	const_iv (MAP_NONBLOCK)
		708
		709	const_iv (MCL_FUTURE)
		710	const_iv (MCL_CURRENT)
		711
		712	const_eio (MS_ASYNC)
		713	const_eio (MS_INVALIDATE)
		714	const_eio (MS_SYNC)
		715
		716	const_eio (MT_MODIFY)
		717
		718	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		719	const_eio (SYNC_FILE_RANGE_WRITE)
		720	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		721
		722	const_eio (READDIR_DENTS)
		723	const_eio (READDIR_DIRS_FIRST)
		724	const_eio (READDIR_STAT_ORDER)
		725	const_eio (READDIR_FOUND_UNKNOWN)
		726
		727	const_eio (DT_UNKNOWN)
		728	const_eio (DT_FIFO)
		729	const_eio (DT_CHR)
		730	const_eio (DT_DIR)
		731	const_eio (DT_BLK)
		732	const_eio (DT_REG)
		733	const_eio (DT_LNK)
		734	const_eio (DT_SOCK)
		735	const_eio (DT_WHT)
		736	};
		737
932	HV *stash = gv_stashpv ("IO::AIO", 1);	738	aio_stash = gv_stashpv ("IO::AIO" , 1);
933	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	739	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
934	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	740	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
935	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
936		741
		742	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		743	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		744
		745	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		746
937	create_pipe ();	747	create_respipe ();
938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
939	}
940		748
		749	if (eio_init (want_poll, done_poll) < 0)
		750	croak ("IO::AIO: unable to initialise eio library");
		751
		752	/* atfork child called in fifo order, so before eio's handler */
		753	X_THREAD_ATFORK (0, 0, atfork_child);
		754	}
		755
941	void	756	void
942	min_parallel (nthreads)	757	max_poll_reqs (int nreqs)
943	int nthreads
944	PROTOTYPE: $	758	PROTOTYPE: $
		759	CODE:
		760	eio_set_max_poll_reqs (nreqs);
945		761
946	void	762	void
947	max_parallel (nthreads)	763	max_poll_time (double nseconds)
948	int nthreads
949	PROTOTYPE: $	764	PROTOTYPE: $
950
951	int
952	max_outstanding (nreqs)
953	int nreqs
954	PROTOTYPE: $
955	CODE:	765	CODE:
956	RETVAL = max_outstanding;	766	eio_set_max_poll_time (nseconds);
		767
		768	void
		769	min_parallel (int nthreads)
		770	PROTOTYPE: $
		771	CODE:
		772	eio_set_min_parallel (nthreads);
		773
		774	void
		775	max_parallel (int nthreads)
		776	PROTOTYPE: $
		777	CODE:
		778	eio_set_max_parallel (nthreads);
		779
		780	void
		781	max_idle (int nthreads)
		782	PROTOTYPE: $
		783	CODE:
		784	eio_set_max_idle (nthreads);
		785
		786	void
		787	max_outstanding (int maxreqs)
		788	PROTOTYPE: $
		789	CODE:
957	max_outstanding = nreqs;	790	max_outstanding = maxreqs;
958		791
959	void	792	void
960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	793	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
961	SV * pathname
962	int flags
963	int mode
964	SV * callback
965	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
966	PPCODE:	795	PPCODE:
967	{	796	{
968	dREQ;	797	dREQ;
969		798
970	req->type = REQ_OPEN;	799	req->type = EIO_OPEN;
971	req->data = newSVsv (pathname);	800	req->sv1 = newSVsv (pathname);
972	req->dataptr = SvPVbyte_nolen (req->data);	801	req->ptr1 = SvPVbyte_nolen (req->sv1);
973	req->fd = flags;	802	req->int1 = flags;
974	req->mode = mode;	803	req->int2 = mode;
975		804
976	REQ_SEND;	805	REQ_SEND;
977	}	806	}
978		807
979	void	808	void
980	aio_close (fh,callback=&PL_sv_undef)	809	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
981	SV * fh
982	SV * callback
983	PROTOTYPE: $;$	810	PROTOTYPE: $;$
984	ALIAS:	811	ALIAS:
985	aio_close = REQ_CLOSE
986	aio_fsync = REQ_FSYNC	812	aio_fsync = EIO_FSYNC
987	aio_fdatasync = REQ_FDATASYNC	813	aio_fdatasync = EIO_FDATASYNC
988	PPCODE:	814	PPCODE:
989	{	815	{
		816	int fd = s_fileno_croak (fh, 0);
990	dREQ;	817	dREQ;
991		818
992	req->type = ix;	819	req->type = ix;
993	req->fh = newSVsv (fh);	820	req->sv1 = newSVsv (fh);
994	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	821	req->int1 = fd;
995		822
996	REQ_SEND (req);	823	REQ_SEND (req);
997	}	824	}
998		825
999	void	826	void
		827	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		828	PROTOTYPE: $$$$;$
		829	PPCODE:
		830	{
		831	int fd = s_fileno_croak (fh, 0);
		832	dREQ;
		833
		834	req->type = EIO_SYNC_FILE_RANGE;
		835	req->sv1 = newSVsv (fh);
		836	req->int1 = fd;
		837	req->offs = offset;
		838	req->size = nbytes;
		839	req->int2 = flags;
		840
		841	REQ_SEND (req);
		842	}
		843
		844	void
		845	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		846	PROTOTYPE: $;$
		847	PPCODE:
		848	{
		849	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		850	int fd = s_fileno_croak (fh, 0);
		851	dREQ;
		852
		853	if (close_pipe < 0)
		854	{
		855	int pipefd [2];
		856
		857	if (pipe (pipefd) < 0
		858	|| close (pipefd [1]) < 0
		859	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		860	abort (); /*D*/
		861
		862	close_pipe = pipefd [0];
		863	}
		864
		865	req->type = EIO_DUP2;
		866	req->int1 = close_pipe;
		867	req->sv2 = newSVsv (fh);
		868	req->int2 = fd;
		869
		870	REQ_SEND (req);
		871	}
		872
		873	void
1000	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	874	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1001	SV * fh
1002	UV offset
1003	UV length
1004	SV * data
1005	UV dataoffset
1006	SV * callback
1007	ALIAS:	875	ALIAS:
1008	aio_read = REQ_READ	876	aio_read = EIO_READ
1009	aio_write = REQ_WRITE	877	aio_write = EIO_WRITE
1010	PROTOTYPE: $$$$$;$	878	PROTOTYPE: $$$$$;$
1011	PPCODE:	879	PPCODE:
1012	{	880	{
1013	aio_req req;
1014	STRLEN svlen;	881	STRLEN svlen;
		882	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1015	char *svptr = SvPVbyte (data, svlen);	883	char *svptr = SvPVbyte (data, svlen);
1016		884	UV len = SvUV (length);
1017	SvUPGRADE (data, SVt_PV);
1018	SvPOK_on (data);
1019		885
1020	if (dataoffset < 0)	886	if (dataoffset < 0)
1021	dataoffset += svlen;	887	dataoffset += svlen;
1022		888
1023	if (dataoffset < 0 || dataoffset > svlen)	889	if (dataoffset < 0 || dataoffset > svlen)
1024	croak ("data offset outside of string");	890	croak ("dataoffset outside of data scalar");
1025		891
1026	if (ix == REQ_WRITE)	892	if (ix == EIO_WRITE)
1027	{	893	{
1028	/* write: check length and adjust. */	894	/* write: check length and adjust. */
1029	if (length < 0 || length + dataoffset > svlen)	895	if (!SvOK (length) || len + dataoffset > svlen)
1030	length = svlen - dataoffset;	896	len = svlen - dataoffset;
1031	}	897	}
1032	else	898	else
1033	{	899	{
1034	/* read: grow scalar as necessary */	900	/* read: check type and grow scalar as necessary */
		901	SvUPGRADE (data, SVt_PV);
1035	svptr = SvGROW (data, length + dataoffset);	902	svptr = SvGROW (data, len + dataoffset + 1);
1036	}	903	}
1037
1038	if (length < 0)
1039	croak ("length must not be negative");
1040		904
1041	{	905	{
1042	dREQ;	906	dREQ;
1043		907
1044	req->type = ix;	908	req->type = ix;
1045	req->fh = newSVsv (fh);	909	req->sv1 = newSVsv (fh);
1046	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	910	req->int1 = fd;
1047	: IoOFP (sv_2io (fh)));	911	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1048	req->offset = offset;	912	req->size = len;
1049	req->length = length;
1050	req->data = SvREFCNT_inc (data);	913	req->sv2 = SvREFCNT_inc (data);
1051	req->dataptr = (char *)svptr + dataoffset;	914	req->ptr2 = (char *)svptr + dataoffset;
		915	req->stroffset = dataoffset;
1052		916
1053	if (!SvREADONLY (data))	917	if (!SvREADONLY (data))
1054	{	918	{
1055	SvREADONLY_on (data);	919	SvREADONLY_on (data);
1056	req->data2ptr = (void *)data;	920	req->flags |= FLAG_SV2_RO_OFF;
1057	}	921	}
1058		922
1059	REQ_SEND;	923	REQ_SEND;
1060	}	924	}
1061	}	925	}
1062		926
1063	void	927	void
		928	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		929	PROTOTYPE: $$;$
		930	PPCODE:
		931	{
		932	SV *data;
		933	dREQ;
		934
		935	req->type = EIO_READLINK;
		936	req->sv1 = newSVsv (path);
		937	req->ptr1 = SvPVbyte_nolen (req->sv1);
		938
		939	REQ_SEND;
		940	}
		941
		942	void
1064	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	943	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1065	SV * out_fh
1066	SV * in_fh
1067	UV in_offset
1068	UV length
1069	SV * callback
1070	PROTOTYPE: $$$$;$	944	PROTOTYPE: $$$$;$
1071	PPCODE:	945	PPCODE:
1072	{	946	{
		947	int ifd = s_fileno_croak (in_fh , 0);
		948	int ofd = s_fileno_croak (out_fh, 1);
1073	dREQ;	949	dREQ;
1074		950
1075	req->type = REQ_SENDFILE;	951	req->type = EIO_SENDFILE;
1076	req->fh = newSVsv (out_fh);	952	req->sv1 = newSVsv (out_fh);
1077	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	953	req->int1 = ofd;
1078	req->fh2 = newSVsv (in_fh);	954	req->sv2 = newSVsv (in_fh);
1079	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	955	req->int2 = ifd;
1080	req->offset = in_offset;	956	req->offs = in_offset;
1081	req->length = length;	957	req->size = length;
1082		958
1083	REQ_SEND;	959	REQ_SEND;
1084	}	960	}
1085		961
1086	void	962	void
1087	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	963	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1088	SV * fh
1089	UV offset
1090	IV length
1091	SV * callback
1092	PROTOTYPE: $$$;$	964	PROTOTYPE: $$$;$
1093	PPCODE:	965	PPCODE:
1094	{	966	{
		967	int fd = s_fileno_croak (fh, 0);
1095	dREQ;	968	dREQ;
1096		969
1097	req->type = REQ_READAHEAD;	970	req->type = EIO_READAHEAD;
1098	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
1099	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	972	req->int1 = fd;
1100	req->offset = offset;	973	req->offs = offset;
1101	req->length = length;	974	req->size = length;
1102		975
1103	REQ_SEND;	976	REQ_SEND;
1104	}	977	}
1105		978
1106	void	979	void
1107	aio_stat (fh_or_path,callback=&PL_sv_undef)	980	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1108	SV * fh_or_path
1109	SV * callback
1110	ALIAS:	981	ALIAS:
1111	aio_stat = REQ_STAT	982	aio_stat = EIO_STAT
1112	aio_lstat = REQ_LSTAT	983	aio_lstat = EIO_LSTAT
		984	aio_statvfs = EIO_STATVFS
1113	PPCODE:	985	PPCODE:
1114	{	986	{
1115	dREQ;	987	dREQ;
1116		988
1117	New (0, req->statdata, 1, Stat_t);	989	req->sv1 = newSVsv (fh_or_path);
1118	if (!req->statdata)
1119	{
1120	req_free (req);
1121	croak ("out of memory during aio_req->statdata allocation");
1122	}
1123		990
1124	if (SvPOK (fh_or_path))	991	if (SvPOK (req->sv1))
1125	{	992	{
1126	req->type = ix;	993	req->type = ix;
1127	req->data = newSVsv (fh_or_path);
1128	req->dataptr = SvPVbyte_nolen (req->data);	994	req->ptr1 = SvPVbyte_nolen (req->sv1);
1129	}	995	}
1130	else	996	else
1131	{	997	{
1132	req->type = REQ_FSTAT;	998	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1133	req->fh = newSVsv (fh_or_path);
1134	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	999	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1135	}	1000	}
1136		1001
1137	REQ_SEND;	1002	REQ_SEND;
1138	}	1003	}
1139		1004
1140	void	1005	void
		1006	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1007	PPCODE:
		1008	{
		1009	dREQ;
		1010
		1011	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1012	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1013	req->sv1 = newSVsv (fh_or_path);
		1014
		1015	if (SvPOK (req->sv1))
		1016	{
		1017	req->type = EIO_UTIME;
		1018	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1019	}
		1020	else
		1021	{
		1022	req->type = EIO_FUTIME;
		1023	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1024	}
		1025
		1026	REQ_SEND;
		1027	}
		1028
		1029	void
		1030	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1031	PPCODE:
		1032	{
		1033	dREQ;
		1034
		1035	req->sv1 = newSVsv (fh_or_path);
		1036	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1037
		1038	if (SvPOK (req->sv1))
		1039	{
		1040	req->type = EIO_TRUNCATE;
		1041	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1042	}
		1043	else
		1044	{
		1045	req->type = EIO_FTRUNCATE;
		1046	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1047	}
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1054	ALIAS:
		1055	aio_chmod = EIO_CHMOD
		1056	aio_mkdir = EIO_MKDIR
		1057	PPCODE:
		1058	{
		1059	dREQ;
		1060
		1061	req->int2 = mode;
		1062	req->sv1 = newSVsv (fh_or_path);
		1063
		1064	if (SvPOK (req->sv1))
		1065	{
		1066	req->type = ix;
		1067	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1068	}
		1069	else
		1070	{
		1071	req->type = EIO_FCHMOD;
		1072	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1073	}
		1074
		1075	REQ_SEND;
		1076	}
		1077
		1078	void
		1079	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1080	PPCODE:
		1081	{
		1082	dREQ;
		1083
		1084	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1085	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1086	req->sv1 = newSVsv (fh_or_path);
		1087
		1088	if (SvPOK (req->sv1))
		1089	{
		1090	req->type = EIO_CHOWN;
		1091	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1092	}
		1093	else
		1094	{
		1095	req->type = EIO_FCHOWN;
		1096	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1097	}
		1098
		1099	REQ_SEND;
		1100	}
		1101
		1102	void
		1103	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	dREQ;
		1107
		1108	req->type = EIO_READDIR;
		1109	req->sv1 = newSVsv (pathname);
		1110	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1111	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1112
		1113	if (flags & EIO_READDIR_DENTS)
		1114	req->int1 |= EIO_READDIR_CUSTOM2;
		1115
		1116	REQ_SEND;
		1117	}
		1118
		1119	void
1141	aio_unlink (pathname,callback=&PL_sv_undef)	1120	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1142	SV * pathname
1143	SV * callback
1144	ALIAS:	1121	ALIAS:
1145	aio_unlink = REQ_UNLINK	1122	aio_unlink = EIO_UNLINK
1146	aio_rmdir = REQ_RMDIR	1123	aio_rmdir = EIO_RMDIR
1147	aio_readdir = REQ_READDIR	1124	aio_readdir = EIO_READDIR
1148	PPCODE:	1125	PPCODE:
1149	{	1126	{
1150	dREQ;	1127	dREQ;
1151		1128
1152	req->type = ix;	1129	req->type = ix;
1153	req->data = newSVsv (pathname);	1130	req->sv1 = newSVsv (pathname);
1154	req->dataptr = SvPVbyte_nolen (req->data);	1131	req->ptr1 = SvPVbyte_nolen (req->sv1);
1155		1132
1156	REQ_SEND;	1133	REQ_SEND;
1157	}	1134	}
1158		1135
1159	void	1136	void
1160	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1137	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1161	SV * oldpath
1162	SV * newpath
1163	SV * callback
1164	ALIAS:	1138	ALIAS:
1165	aio_link = REQ_LINK	1139	aio_link = EIO_LINK
1166	aio_symlink = REQ_SYMLINK	1140	aio_symlink = EIO_SYMLINK
1167	aio_rename = REQ_RENAME	1141	aio_rename = EIO_RENAME
1168	PPCODE:	1142	PPCODE:
1169	{	1143	{
1170	dREQ;	1144	dREQ;
1171		1145
1172	req->type = ix;	1146	req->type = ix;
1173	req->fh = newSVsv (oldpath);	1147	req->sv1 = newSVsv (oldpath);
1174	req->data2ptr = SvPVbyte_nolen (req->fh);	1148	req->ptr1 = SvPVbyte_nolen (req->sv1);
1175	req->data = newSVsv (newpath);	1149	req->sv2 = newSVsv (newpath);
1176	req->dataptr = SvPVbyte_nolen (req->data);	1150	req->ptr2 = SvPVbyte_nolen (req->sv2);
1177		1151
1178	REQ_SEND;	1152	REQ_SEND;
1179	}	1153	}
1180		1154
1181	void	1155	void
1182	aio_sleep (delay,callback=&PL_sv_undef)	1156	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1183	double delay
1184	SV * callback
1185	PPCODE:	1157	PPCODE:
1186	{	1158	{
1187	dREQ;	1159	dREQ;
1188		1160
1189	req->type = REQ_SLEEP;	1161	req->type = EIO_MKNOD;
1190	req->fd = delay < 0. ? 0 : delay;	1162	req->sv1 = newSVsv (pathname);
1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
1192		1164	req->int2 = (mode_t)mode;
		1165	req->offs = dev;
		1166
1193	REQ_SEND;	1167	REQ_SEND;
1194	}	1168	}
1195		1169
1196	void	1170	void
		1171	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1172	ALIAS:
		1173	aio_mtouch = EIO_MTOUCH
		1174	aio_msync = EIO_MSYNC
		1175	PROTOTYPE: $$$$;$
		1176	PPCODE:
		1177	{
		1178	STRLEN svlen;
		1179	UV len = SvUV (length);
		1180	char *svptr = SvPVbyte (data, svlen);
		1181
		1182	if (offset < 0)
		1183	offset += svlen;
		1184
		1185	if (offset < 0 || offset > svlen)
		1186	croak ("offset outside of scalar");
		1187
		1188	if (!SvOK (length) || len + offset > svlen)
		1189	len = svlen - offset;
		1190
		1191	{
		1192	dREQ;
		1193
		1194	req->type = ix;
		1195	req->size = len;
		1196	req->sv2 = SvREFCNT_inc (data);
		1197	req->ptr2 = (char *)svptr + offset;
		1198	req->int1 = flags;
		1199
		1200	REQ_SEND;
		1201	}
		1202	}
		1203
		1204	void
		1205	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1206	PPCODE:
		1207	{
		1208	dREQ;
		1209
		1210	req->type = EIO_BUSY;
		1211	req->nv1 = delay < 0. ? 0. : delay;
		1212
		1213	REQ_SEND;
		1214	}
		1215
		1216	void
1197	aio_group (callback=&PL_sv_undef)	1217	aio_group (SV *callback=&PL_sv_undef)
1198	SV * callback
1199	PROTOTYPE: ;$	1218	PROTOTYPE: ;$
1200	PPCODE:	1219	PPCODE:
1201	{	1220	{
1202	dREQ;	1221	dREQ;
		1222
1203	req->type = REQ_GROUP;	1223	req->type = EIO_GROUP;
		1224
1204	req_send (req);	1225	req_submit (req);
1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1226	XPUSHs (req_sv (req, aio_grp_stash));
1206	}	1227	}
		1228
		1229	void
		1230	aio_nop (SV *callback=&PL_sv_undef)
		1231	ALIAS:
		1232	aio_nop = EIO_NOP
		1233	aio_sync = EIO_SYNC
		1234	PPCODE:
		1235	{
		1236	dREQ;
		1237
		1238	req->type = ix;
		1239
		1240	REQ_SEND;
		1241	}
		1242
		1243	int
		1244	aioreq_pri (int pri = 0)
		1245	PROTOTYPE: ;$
		1246	CODE:
		1247	RETVAL = next_pri;
		1248	if (items > 0)
		1249	{
		1250	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1251	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1252	next_pri = pri;
		1253	}
		1254	OUTPUT:
		1255	RETVAL
		1256
		1257	void
		1258	aioreq_nice (int nice = 0)
		1259	CODE:
		1260	nice = next_pri - nice;
		1261	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1262	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1263	next_pri = nice;
1207		1264
1208	void	1265	void
1209	flush ()	1266	flush ()
1210	PROTOTYPE:	1267	PROTOTYPE:
1211	CODE:	1268	CODE:
1212	while (nreqs)	1269	while (eio_nreqs ())
1213	{	1270	{
1214	poll_wait ();	1271	poll_wait ();
1215	poll_cb ();	1272	poll_cb ();
1216	}	1273	}
1217		1274
1218	void	1275	int
1219	poll()	1276	poll()
1220	PROTOTYPE:	1277	PROTOTYPE:
1221	CODE:	1278	CODE:
1222	if (nreqs)
1223	{
1224	poll_wait ();	1279	poll_wait ();
1225	poll_cb ();	1280	RETVAL = poll_cb ();
1226	}	1281	OUTPUT:
		1282	RETVAL
1227		1283
1228	int	1284	int
1229	poll_fileno()	1285	poll_fileno()
1230	PROTOTYPE:	1286	PROTOTYPE:
1231	CODE:	1287	CODE:
1232	RETVAL = respipe [0];	1288	RETVAL = s_epipe_fd (&respipe);
1233	OUTPUT:	1289	OUTPUT:
1234	RETVAL	1290	RETVAL
1235		1291
1236	int	1292	int
1237	poll_cb(...)	1293	poll_cb(...)
…		…
1243		1299
1244	void	1300	void
1245	poll_wait()	1301	poll_wait()
1246	PROTOTYPE:	1302	PROTOTYPE:
1247	CODE:	1303	CODE:
1248	if (nreqs)
1249	poll_wait ();	1304	poll_wait ();
1250		1305
1251	int	1306	int
1252	nreqs()	1307	nreqs()
1253	PROTOTYPE:	1308	PROTOTYPE:
1254	CODE:	1309	CODE:
1255	RETVAL = nreqs;	1310	RETVAL = eio_nreqs ();
1256	OUTPUT:	1311	OUTPUT:
1257	RETVAL	1312	RETVAL
1258		1313
		1314	int
		1315	nready()
		1316	PROTOTYPE:
		1317	CODE:
		1318	RETVAL = eio_nready ();
		1319	OUTPUT:
		1320	RETVAL
		1321
		1322	int
		1323	npending()
		1324	PROTOTYPE:
		1325	CODE:
		1326	RETVAL = eio_npending ();
		1327	OUTPUT:
		1328	RETVAL
		1329
		1330	int
		1331	nthreads()
		1332	PROTOTYPE:
		1333	CODE:
		1334	RETVAL = eio_nthreads ();
		1335	OUTPUT:
		1336	RETVAL
		1337
		1338	int
		1339	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1340	PROTOTYPE: $$$$
		1341	CODE:
		1342	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1343	RETVAL = posix_fadvise (fh, offset, length, advice);
		1344	#else
		1345	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1346	#endif
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	ssize_t
		1351	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1352	PROTOTYPE: $$$$
		1353	CODE:
		1354	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1355	OUTPUT:
		1356	RETVAL
		1357
		1358	void
		1359	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1360	PROTOTYPE: $$$$$;$
		1361	PPCODE:
		1362	sv_unmagic (scalar, MMAP_MAGIC);
		1363	{
		1364	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1365	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1366	if (addr == (void *)-1)
		1367	XSRETURN_NO;
		1368
		1369	/* we store the length in mg_obj, as namlen is I32 :/ */
		1370	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1371	->mg_obj = (SV *)length;
		1372
		1373	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1374	if (!(prot & PROT_WRITE))
		1375	SvREADONLY_on (scalar);
		1376
		1377	SvPVX (scalar) = (char *)addr;
		1378	SvCUR_set (scalar, length);
		1379	SvLEN_set (scalar, 0);
		1380	SvPOK_only (scalar);
		1381
		1382	XSRETURN_YES;
		1383	}
		1384
		1385	void
		1386	munmap (SV *scalar)
		1387	PROTOTYPE: $
		1388	CODE:
		1389	sv_unmagic (scalar, MMAP_MAGIC);
		1390
		1391	int
		1392	mlockall (int flags)
		1393	PROTOTYPE: $
		1394	CODE:
		1395	#if _POSIX_MEMLOCK
		1396	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1397	extern int mallopt (int, int);
		1398	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1399	#endif
		1400	mlockall (flags);
		1401	#else
		1402	RETVAL = -1;
		1403	errno = ENOSYS;
		1404	#endif
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	munlockall ()
		1410	PROTOTYPE:
		1411	CODE:
		1412	#if _POSIX_MEMLOCK
		1413	munlockall ();
		1414	#else
		1415	RETVAL = -1;
		1416	errno = ENOSYS;
		1417	#endif
		1418	OUTPUT:
		1419	RETVAL
		1420
		1421	void _on_next_submit (SV *cb)
		1422	CODE:
		1423	SvREFCNT_dec (on_next_submit);
		1424	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1425
1259	PROTOTYPES: DISABLE	1426	PROTOTYPES: DISABLE
1260		1427
1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1428	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1262		1429
1263	void	1430	void
1264	cancel (aio_req_ornot req)	1431	cancel (aio_req_ornot req)
1265	PROTOTYPE:
1266	CODE:	1432	CODE:
1267	req_cancel (req);	1433	eio_cancel (req);
		1434
		1435	void
		1436	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1437	PPCODE:
		1438	{
		1439	if (GIMME_V != G_VOID)
		1440	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1441
		1442	if (items > 1)
		1443	{
		1444	SV *cb_cv =get_cb (callback);
		1445
		1446	SvREFCNT_dec (req->callback);
		1447	req->callback = SvREFCNT_inc (cb_cv);
		1448	}
		1449	}
1268		1450
1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1451	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1270		1452
1271	void	1453	void
1272	add (aio_req grp, ...)	1454	add (aio_req grp, ...)
1273	PPCODE:	1455	PPCODE:
1274	{	1456	{
1275	int i;	1457	int i;
1276		1458
1277	if (grp->fd == 2)	1459	if (grp->int1 == 2)
1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1460	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1279		1461
1280	for (i = 1; i < items; ++i )	1462	for (i = 1; i < items; ++i )
1281	{	1463	{
		1464	aio_req req;
		1465
1282	if (GIMME_V != G_VOID)	1466	if (GIMME_V != G_VOID)
1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1467	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1284		1468
1285	aio_req req = SvAIO_REQ (ST (i));	1469	req = SvAIO_REQ (ST (i));
1286		1470
1287	if (req)	1471	if (req)
1288	{	1472	eio_grp_add (grp, req);
1289	++grp->length;
1290	req->grp = grp;
1291
1292	req->grp_prev = 0;
1293	req->grp_next = grp->grp_first;
1294
1295	if (grp->grp_first)
1296	grp->grp_first->grp_prev = req;
1297
1298	grp->grp_first = req;
1299	}
1300	}	1473	}
1301	}	1474	}
1302		1475
1303	void	1476	void
		1477	cancel_subs (aio_req_ornot req)
		1478	CODE:
		1479	req_cancel_subs (req);
		1480
		1481	void
1304	result (aio_req grp, ...)	1482	result (aio_req grp, ...)
1305	CODE:	1483	CODE:
1306	{	1484	{
1307	int i;	1485	int i;
1308	AV *av = newAV ();	1486	AV *av;
1309		1487
		1488	grp->errorno = errno;
		1489
		1490	av = newAV ();
		1491	av_extend (av, items - 1);
		1492
1310	for (i = 1; i < items; ++i )	1493	for (i = 1; i < items; ++i )
1311	av_push (av, newSVsv (ST (i)));	1494	av_push (av, newSVsv (ST (i)));
1312		1495
1313	SvREFCNT_dec (grp->data);	1496	SvREFCNT_dec (grp->sv1);
1314	grp->data = (SV *)av;	1497	grp->sv1 = (SV *)av;
1315	}	1498	}
1316		1499
1317	void	1500	void
		1501	errno (aio_req grp, int errorno = errno)
		1502	CODE:
		1503	grp->errorno = errorno;
		1504
		1505	void
1318	feeder_limit (aio_req grp, int limit)	1506	limit (aio_req grp, int limit)
1319	CODE:	1507	CODE:
1320	grp->fd2 = limit;	1508	eio_grp_limit (grp, limit);
1321	aio_grp_feed (grp);
1322		1509
1323	void	1510	void
1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1511	feed (aio_req grp, SV *callback=&PL_sv_undef)
1325	CODE:	1512	CODE:
1326	{	1513	{
1327	SvREFCNT_dec (grp->fh2);	1514	SvREFCNT_dec (grp->sv2);
1328	grp->fh2 = newSVsv (callback);	1515	grp->sv2 = newSVsv (callback);
		1516	grp->feed = aio_grp_feed;
1329		1517
1330	if (grp->fd2 <= 0)	1518	if (grp->int2 <= 0)
1331	grp->fd2 = 2;	1519	grp->int2 = 2;
1332		1520
1333	aio_grp_feed (grp);	1521	eio_grp_limit (grp, grp->int2);
1334	}	1522	}
1335		1523

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