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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.58 by root, Mon Oct 23 18:48:08 2006 UTC vs.
Revision 1.166 by root, Sun May 9 20:43:28 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_GROUP, REQ_NOP,
61	REQ_SLEEP,
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 pri;
89	unsigned char flags;
90	} aio_cb;
91
92	enum {
93	FLAG_CANCELLED = 0x01,
94	};
95
96	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
98		223
99	static int started, wanted;	224	static SV *on_next_submit;
100	static volatile int nreqs;	225	static int next_pri = EIO_PRI_DEFAULT;
101	static int max_outstanding = 1<<30;	226	static int max_outstanding;
102	static int respipe [2];
103		227
104	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
105	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
106	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
107		229
108	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	static void req_destroy (aio_req req);
109	static volatile aio_req ress, rese; /* queue start, queue end */
110
111	static void req_invoke (aio_req req);	231	static void req_cancel (aio_req req);
112	static void req_free (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	}
113		244
114	/* must be called at most once */	245	/* must be called at most once */
115	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
116	{	247	{
117	if (!req->self)	248	if (!req->self)
118	{	249	{
119	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
120	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
121	}	252	}
122		253
123	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
124	}	255	}
125		256
126	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
127	{	258	{
128	MAGIC *mg;	259	MAGIC *mg;
129		260
130	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	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")))
131	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
132		266
133	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
134		268
135	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
136	}	270	}
137		271
138	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
139	{	273	{
140	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
141	{	275	{
142	int old_len = grp->length;	276	dSP;
143		277
144	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	if (req->flags & FLAG_SV2_RO_OFF)
		310	SvREADONLY_off (req->sv2);
		311
		312	if (!EIO_CANCELLED (req) && req->callback)
		313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
		318	ENTER;
		319	SAVETMPS;
		320	PUSHMARK (SP);
		321	EXTEND (SP, 1);
		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
145	{	325	{
146	dSP;	326	sv_result = sv_result_cache; sv_result_cache = 0;
147		327	SvIV_set (sv_result, req->result);
148	ENTER;
149	SAVETMPS;
150	PUSHMARK (SP);
151	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
152	PUTBACK;
153	call_sv (grp->fh2, G_VOID | G_EVAL);
154	SPAGAIN;
155	FREETMPS;
156	LEAVE;
157	}	328	}
158		329	else
159	/* stop if no progress has been made */
160	if (old_len == grp->length)
161	{	330	{
162	SvREFCNT_dec (grp->fh2);	331	sv_result = newSViv (req->result);
163	grp->fh2 = 0;	332	SvREADONLY_on (sv_result);
164	break;
165	}	333	}
		334
		335	switch (req->type)
		336	{
		337	case EIO_READDIR:
		338	{
		339	SV *rv = &PL_sv_undef;
		340
		341	if (req->result >= 0)
		342	{
		343	int i;
		344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		346	AV *av = newAV ();
		347
		348	av_extend (av, req->result - 1);
		349
		350	for (i = 0; i < req->result; ++i)
		351	{
		352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
		376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
		384	names += SvCUR (name) + 1;
		385	}
		386	}
		387
		388	rv = sv_2mortal (newRV_noinc ((SV *)av));
		389	}
		390
		391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		395	}
		396	break;
		397
		398	case EIO_OPEN:
		399	{
		400	/* convert fd to fh */
		401	SV *fh = &PL_sv_undef;
		402
		403	if (req->result >= 0)
		404	{
		405	GV *gv = (GV *)sv_newmortal ();
		406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
		412
		413	symlen = snprintf (
		414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
		425	PUSHs (fh);
		426	}
		427	break;
		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
		459	case EIO_GROUP:
		460	req->int1 = 2; /* mark group as finished */
		461
		462	if (req->sv1)
		463	{
		464	int i;
		465	AV *av = (AV *)req->sv1;
		466
		467	EXTEND (SP, AvFILL (av) + 1);
		468	for (i = 0; i <= AvFILL (av); ++i)
		469	PUSHs (*av_fetch (av, i, 0));
		470	}
		471	break;
		472
		473	case EIO_NOP:
		474	case EIO_BUSY:
		475	break;
		476
		477	case EIO_READLINK:
		478	if (req->result > 0)
		479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		480	break;
		481
		482	case EIO_STAT:
		483	case EIO_LSTAT:
		484	case EIO_FSTAT:
		485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		486	PL_laststatval = req->result;
		487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		488	PUSHs (sv_result);
		489	break;
		490
		491	case EIO_READ:
		492	{
		493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		494	*SvEND (req->sv2) = 0;
		495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
		499	break;
		500
		501	case EIO_DUP2:
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
		506	default:
		507	PUSHs (sv_result);
		508	break;
		509	}
		510
		511	errno = req->errorno;
		512
		513	PUTBACK;
		514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
		521
		522	FREETMPS;
		523	LEAVE;
		524
		525	PUTBACK;
166	}	526	}
167	}
168		527
169	static void aio_grp_dec (aio_req grp)	528	return !!SvTRUE (ERRSV);
170	{
171	--grp->length;
172
173	/* call feeder, if applicable */
174	aio_grp_feed (grp);
175
176	/* finish, if done */
177	if (!grp->length && grp->fd)
178	{
179	req_invoke (grp);
180	req_free (grp);
181	}
182	}	529	}
183		530
184	static void poll_wait ()
185	{
186	if (nreqs && !ress)
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191
192	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}
194	}
195
196	static void req_invoke (aio_req req)
197	{
198	dSP;
199	int errorno = errno;
200
201	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
202	return;
203
204	errno = req->errorno;
205
206	ENTER;
207	SAVETMPS;
208	PUSHMARK (SP);
209	EXTEND (SP, 1);
210
211	switch (req->type)
212	{
213	case REQ_READDIR:
214	{
215	SV *rv = &PL_sv_undef;
216
217	if (req->result >= 0)
218	{
219	char *buf = req->data2ptr;
220	AV *av = newAV ();
221
222	while (req->result)
223	{
224	SV *sv = newSVpv (buf, 0);
225
226	av_push (av, sv);
227	buf += SvCUR (sv) + 1;
228	req->result--;
229	}
230
231	rv = sv_2mortal (newRV_noinc ((SV *)av));
232	}
233
234	PUSHs (rv);
235	}
236	break;
237
238	case REQ_OPEN:
239	{
240	/* convert fd to fh */
241	SV *fh;
242
243	PUSHs (sv_2mortal (newSViv (req->result)));
244	PUTBACK;
245	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
246	SPAGAIN;
247
248	fh = SvREFCNT_inc (POPs);
249
250	PUSHMARK (SP);
251	XPUSHs (sv_2mortal (fh));
252	}
253	break;
254
255	case REQ_GROUP:
256	req->fd = 2; /* mark group as finished */
257
258	if (req->data)
259	{
260	int i;
261	AV *av = (AV *)req->data;
262
263	EXTEND (SP, AvFILL (av) + 1);
264	for (i = 0; i <= AvFILL (av); ++i)
265	PUSHs (*av_fetch (av, i, 0));
266	}
267	break;
268
269	case REQ_NOP:
270	case REQ_SLEEP:
271	break;
272
273	default:
274	PUSHs (sv_2mortal (newSViv (req->result)));
275	break;
276	}
277
278
279	PUTBACK;
280	call_sv (req->callback, G_VOID | G_EVAL);
281	SPAGAIN;
282
283	FREETMPS;
284	LEAVE;
285
286	errno = errorno;
287
288	if (SvTRUE (ERRSV))
289	{
290	req_free (req);
291	croak (0);
292	}
293	}
294
295	static void req_free (aio_req req)	531	static void req_destroy (aio_req req)
296	{	532	{
297	if (req->grp)
298	{
299	aio_req grp = req->grp;
300
301	/* unlink request */
302	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
303	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
304
305	if (grp->grp_first == req)
306	grp->grp_first = req->grp_next;
307
308	aio_grp_dec (grp);
309	}
310
311	if (req->self)	533	if (req->self)
312	{	534	{
313	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
314	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
315	}	537	}
316		538
317	SvREFCNT_dec (req->data);
318	SvREFCNT_dec (req->fh);	539	SvREFCNT_dec (req->sv1);
319	SvREFCNT_dec (req->fh2);	540	SvREFCNT_dec (req->sv2);
320	SvREFCNT_dec (req->callback);	541	SvREFCNT_dec (req->callback);
321	Safefree (req->statdata);
322
323	if (req->type == REQ_READDIR && req->result >= 0)
324	free (req->data2ptr);
325		542
326	Safefree (req);	543	Safefree (req);
327	}	544	}
328		545
329	static void req_cancel (aio_req req)	546	static void req_cancel_subs (aio_req grp)
330	{	547	{
331	req->flags |= FLAG_CANCELLED;	548	aio_req sub;
332		549
333	if (req->type == REQ_GROUP)	550	if (grp->type != EIO_GROUP)
		551	return;
		552
		553	SvREFCNT_dec (grp->sv2);
		554	grp->sv2 = 0;
		555
		556	eio_grp_cancel (grp);
		557	}
		558
		559	static void
		560	create_respipe (void)
		561	{
		562	if (s_epipe_renew (&respipe))
		563	croak ("IO::AIO: unable to initialize result pipe");
		564	}
		565
		566	static void poll_wait (void)
		567	{
		568	while (eio_nreqs ())
334	{	569	{
335	aio_req sub;	570	int size;
336		571
337	for (sub = req->grp_first; sub; sub = sub->grp_next)	572	X_LOCK (reslock);
338	req_cancel (sub);	573	size = res_queue.size;
		574	X_UNLOCK (reslock);
		575
		576	if (size)
		577	return;
		578
		579	etp_maybe_start_thread ();
		580
		581	s_epipe_wait (&respipe);
339	}	582	}
340	}	583	}
341		584
342	static int poll_cb ()	585	static int poll_cb (void)
343	{	586	{
344	dSP;
345	int count = 0;
346	int do_croak = 0;
347	aio_req req;
348
349	for (;;)	587	for (;;)
350	{	588	{
351	pthread_mutex_lock (&reslock);	589	int res = eio_poll ();
352	req = ress;
353		590
354	if (req)	591	if (res > 0)
355	{
356	ress = req->next;
357
358	if (!ress)
359	{
360	/* read any signals sent by the worker threads */
361	char buf [32];
362	while (read (respipe [0], buf, 32) == 32)
363	;
364
365	rese = 0;
366	}
367	}
368
369	pthread_mutex_unlock (&reslock);
370
371	if (!req)
372	break;	592	croak (0);
373		593
374	--nreqs;	594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
375		596
376	if (req->type == REQ_QUIT)	597	poll_wait ();
377	started--;
378	else if (req->type == REQ_GROUP && req->length)
379	{
380	req->fd = 1; /* mark request as delayed */
381	continue;
382	}
383	else
384	{
385	if (req->type == REQ_READ)
386	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
387
388	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
389	SvREADONLY_off (req->data);
390
391	if (req->statdata)
392	{
393	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
394	PL_laststatval = req->result;
395	PL_statcache = *(req->statdata);
396	}
397
398	req_invoke (req);
399
400	count++;
401	}
402
403	req_free (req);
404	}	598	}
405
406	return count;
407	}	599	}
408		600
409	static void *aio_proc(void *arg);
410
411	static void start_thread (void)	601	static void atfork_child (void)
412	{	602	{
413	sigset_t fullsigset, oldsigset;	603	create_respipe ();
414	pthread_t tid;
415	pthread_attr_t attr;
416
417	pthread_attr_init (&attr);
418	pthread_attr_setstacksize (&attr, STACKSIZE);
419	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
420
421	sigfillset (&fullsigset);
422	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
423
424	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
425	started++;
426
427	sigprocmask (SIG_SETMASK, &oldsigset, 0);
428	}
429
430	static void req_send (aio_req req)
431	{
432	while (started < wanted && nreqs >= started)
433	start_thread ();
434
435	++nreqs;
436
437	pthread_mutex_lock (&reqlock);
438
439	req->next = 0;
440
441	if (reqe)
442	{
443	reqe->next = req;
444	reqe = req;
445	}
446	else
447	reqe = reqs = req;
448
449	pthread_cond_signal (&reqwait);
450	pthread_mutex_unlock (&reqlock);
451
452	if (nreqs > max_outstanding)
453	for (;;)
454	{
455	poll_cb ();
456
457	if (nreqs <= max_outstanding)
458	break;
459
460	poll_wait ();
461	}
462	}
463
464	static void end_thread (void)
465	{
466	aio_req req;
467	Newz (0, req, 1, aio_cb);
468	req->type = REQ_QUIT;
469
470	req_send (req);
471	}
472
473	static void min_parallel (int nthreads)
474	{
475	if (wanted < nthreads)
476	wanted = nthreads;
477	}
478
479	static void max_parallel (int nthreads)
480	{
481	int cur = started;
482
483	if (wanted > nthreads)
484	wanted = nthreads;
485
486	while (cur > wanted)
487	{
488	end_thread ();
489	cur--;
490	}
491
492	while (started > wanted)
493	{
494	poll_wait ();
495	poll_cb ();
496	}
497	}
498
499	static void create_pipe ()
500	{
501	if (pipe (respipe))
502	croak ("unable to initialize result pipe");
503
504	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
505	croak ("cannot set result pipe to nonblocking mode");
506
507	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
508	croak ("cannot set result pipe to nonblocking mode");
509	}	604	}
510		605
511	/*****************************************************************************/	606	/*****************************************************************************/
512	/* work around various missing functions */
513		607
514	#if !HAVE_PREADWRITE	608	#if !_POSIX_MAPPED_FILES
515	# define pread aio_pread	609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
516	# define pwrite aio_pwrite	610	# define munmap(addr,length) (errno = ENOSYS, -1)
517
518	/*
519	* make our pread/pwrite safe against themselves, but not against
520	* normal read/write by using a mutex. slows down execution a lot,
521	* but that's your problem, not mine.
522	*/
523	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
524
525	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
526	{
527	ssize_t res;
528	off_t ooffset;
529
530	pthread_mutex_lock (&preadwritelock);
531	ooffset = lseek (fd, 0, SEEK_CUR);
532	lseek (fd, offset, SEEK_SET);
533	res = read (fd, buf, count);
534	lseek (fd, ooffset, SEEK_SET);
535	pthread_mutex_unlock (&preadwritelock);
536
537	return res;
538	}
539
540	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
541	{
542	ssize_t res;
543	off_t ooffset;
544
545	pthread_mutex_lock (&preadwritelock);
546	ooffset = lseek (fd, 0, SEEK_CUR);
547	lseek (fd, offset, SEEK_SET);
548	res = write (fd, buf, count);
549	lseek (fd, offset, SEEK_SET);
550	pthread_mutex_unlock (&preadwritelock);
551
552	return res;
553	}
554	#endif
555
556	#if !HAVE_FDATASYNC
557	# define fdatasync fsync
558	#endif
559
560	#if !HAVE_READAHEAD
561	# define readahead aio_readahead
562
563	static ssize_t readahead (int fd, off_t offset, size_t count)
564	{
565	char readahead_buf[4096];
566
567	while (count > 0)
568	{
569	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
570
571	pread (fd, readahead_buf, len, offset);
572	offset += len;
573	count -= len;
574	}
575
576	errno = 0;
577	}
578	#endif
579
580	#if !HAVE_READDIR_R
581	# define readdir_r aio_readdir_r
582
583	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
584
585	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
586	{
587	struct dirent *e;
588	int errorno;
589
590	pthread_mutex_lock (&readdirlock);
591
592	e = readdir (dirp);
593	errorno = errno;
594
595	if (e)
596	{
597	*res = ent;
598	strcpy (ent->d_name, e->d_name);
599	}
600	else
601	*res = 0;
602
603	pthread_mutex_unlock (&readdirlock);
604
605	errno = errorno;
606	return e ? 0 : -1;
607	}
608	#endif
609
610	/* sendfile always needs emulation */
611	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
612	{
613	ssize_t res;
614
615	if (!count)
616	return 0;
617
618	#if HAVE_SENDFILE
619	# if __linux
620	res = sendfile (ofd, ifd, &offset, count);
621
622	# elif __freebsd
623	/*
624	* Of course, the freebsd sendfile is a dire hack with no thoughts
625	* wasted on making it similar to other I/O functions.
626	*/
627	{
628	off_t sbytes;
629	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
630
631	if (res < 0 && sbytes)
632	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
633	res = sbytes;
634	}
635
636	# elif __hpux
637	res = sendfile (ofd, ifd, offset, count, 0, 0);
638
639	# elif __solaris
640	{
641	struct sendfilevec vec;
642	size_t sbytes;
643
644	vec.sfv_fd = ifd;
645	vec.sfv_flag = 0;
646	vec.sfv_off = offset;
647	vec.sfv_len = count;
648
649	res = sendfilev (ofd, &vec, 1, &sbytes);
650
651	if (res < 0 && sbytes)
652	res = sbytes;
653	}
654
655	# endif	611	#endif
656	#else
657	res = -1;
658	errno = ENOSYS;
659	#endif
660		612
661	if (res < 0	613	#define MMAP_MAGIC PERL_MAGIC_ext
662	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
663	#if __solaris
664	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
665	#endif
666	)
667	)
668	{
669	/* emulate sendfile. this is a major pain in the ass */
670	char buf[4096];
671	res = 0;
672		614
673	while (count)	615	static int
674	{	616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
675	ssize_t cnt;
676
677	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	cnt = write (ofd, buf, cnt);
686
687	if (cnt <= 0)
688	{
689	if (cnt && !res) res = -1;
690	break;
691	}
692
693	offset += cnt;
694	res += cnt;
695	count -= cnt;
696	}
697	}
698
699	return res;
700	}
701
702	/* read a full directory */
703	static int scandir_ (const char *path, void **namesp)
704	{	617	{
705	DIR *dirp = opendir (path);	618	int old_errno = errno;
706	union	619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
707	{
708	struct dirent d;
709	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
710	} u;
711	struct dirent *entp;
712	char *name, *names;
713	int memlen = 4096;
714	int memofs = 0;
715	int res = 0;
716	int errorno;
717
718	if (!dirp)
719	return -1;
720
721	names = malloc (memlen);
722
723	for (;;)
724	{
725	errno = 0, readdir_r (dirp, &u.d, &entp);
726
727	if (!entp)
728	break;
729
730	name = entp->d_name;
731
732	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
733	{
734	int len = strlen (name) + 1;
735
736	res++;
737
738	while (memofs + len > memlen)
739	{
740	memlen *= 2;
741	names = realloc (names, memlen);
742	if (!names)
743	break;
744	}
745
746	memcpy (names + memofs, name, len);
747	memofs += len;
748	}
749	}
750
751	errorno = errno;	620	errno = old_errno;
752	closedir (dirp);
753		621
754	if (errorno)	622	mg->mg_obj = 0; /* just in case */
755	{
756	free (names);
757	errno = errorno;
758	res = -1;
759	}
760		623
761	*namesp = (void *)names;	624	SvREADONLY_off (sv);
		625	SvCUR_set (sv, 0);
		626	SvLEN_set (sv, 0);
		627	SvPVX (sv) = 0;
		628	SvOK_off (sv);
		629
762	return res;	630	return 0;
763	}	631	}
		632
		633	static MGVTBL mmap_vtbl = {
		634	0, 0, 0, 0, mmap_free
		635	};
764		636
765	/*****************************************************************************/	637	/*****************************************************************************/
766		638
767	static void *aio_proc (void *thr_arg)	639	static SV *
		640	get_cb (SV *cb_sv)
768	{	641	{
769	aio_req req;	642	SvGETMAGIC (cb_sv);
770	int type;	643	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
771
772	do
773	{
774	pthread_mutex_lock (&reqlock);
775
776	for (;;)
777	{
778	req = reqs;
779
780	if (reqs)
781	{
782	reqs = reqs->next;
783	if (!reqs) reqe = 0;
784	}
785
786	if (req)
787	break;
788
789	pthread_cond_wait (&reqwait, &reqlock);
790	}
791
792	pthread_mutex_unlock (&reqlock);
793
794	errno = 0; /* strictly unnecessary */
795
796	if (!(req->flags & FLAG_CANCELLED))
797	switch (type = req->type) /* remember type for QUIT check */
798	{
799	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
800	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
801
802	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
803	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
804
805	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
806	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
807	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
808
809	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
810	case REQ_CLOSE: req->result = close (req->fd); break;
811	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
812	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
813	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
814	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
815	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
816
817	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
818	case REQ_FSYNC: req->result = fsync (req->fd); break;
819	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
820
821	case REQ_SLEEP:
822	{
823	struct timeval tv;
824
825	tv.tv_sec = req->fd;
826	tv.tv_usec = req->fd2;
827
828	req->result = select (0, 0, 0, 0, &tv);
829	}
830
831	case REQ_GROUP:
832	case REQ_NOP:
833	case REQ_QUIT:
834	break;
835
836	default:
837	req->result = ENOSYS;
838	break;
839	}
840
841	req->errorno = errno;
842
843	pthread_mutex_lock (&reslock);
844
845	req->next = 0;
846
847	if (rese)
848	{
849	rese->next = req;
850	rese = req;
851	}
852	else
853	{
854	rese = ress = req;
855
856	/* write a dummy byte to the pipe so fh becomes ready */
857	write (respipe [1], &respipe, 1);
858	}
859
860	pthread_mutex_unlock (&reslock);
861	}
862	while (type != REQ_QUIT);
863
864	return 0;
865	}
866
867	/*****************************************************************************/
868
869	static void atfork_prepare (void)
870	{
871	pthread_mutex_lock (&reqlock);
872	pthread_mutex_lock (&reslock);
873	#if !HAVE_PREADWRITE
874	pthread_mutex_lock (&preadwritelock);
875	#endif
876	#if !HAVE_READDIR_R
877	pthread_mutex_lock (&readdirlock);
878	#endif
879	}
880
881	static void atfork_parent (void)
882	{
883	#if !HAVE_READDIR_R
884	pthread_mutex_unlock (&readdirlock);
885	#endif
886	#if !HAVE_PREADWRITE
887	pthread_mutex_unlock (&preadwritelock);
888	#endif
889	pthread_mutex_unlock (&reslock);
890	pthread_mutex_unlock (&reqlock);
891	}
892
893	static void atfork_child (void)
894	{
895	aio_req prv;
896
897	started = 0;
898
899	while (reqs)
900	{
901	prv = reqs;
902	reqs = prv->next;
903	req_free (prv);
904	}
905
906	reqs = reqe = 0;
907
908	while (ress)
909	{
910	prv = ress;
911	ress = prv->next;
912	req_free (prv);
913	}
914
915	ress = rese = 0;
916
917	close (respipe [0]);
918	close (respipe [1]);
919	create_pipe ();
920
921	atfork_parent ();
922	}	644	}
923		645
924	#define dREQ \	646	#define dREQ \
		647	SV *cb_cv; \
925	aio_req req; \	648	aio_req req; \
		649	int req_pri = next_pri; \
		650	next_pri = EIO_PRI_DEFAULT; \
926	\	651	\
927	if (SvOK (callback) && !SvROK (callback)) \	652	cb_cv = get_cb (callback); \
928	croak ("callback must be undef or of reference type"); \
929	\	653	\
930	Newz (0, req, 1, aio_cb); \	654	Newz (0, req, 1, eio_req); \
931	if (!req) \	655	if (!req) \
932	croak ("out of memory during aio_req allocation"); \	656	croak ("out of memory during eio_req allocation"); \
933	\	657	\
934	req->callback = newSVsv (callback)	658	req->callback = SvREFCNT_inc (cb_cv); \
		659	req->pri = req_pri
935		660
936	#define REQ_SEND \	661	#define REQ_SEND \
		662	PUTBACK; \
937	req_send (req); \	663	req_submit (req); \
		664	SPAGAIN; \
938	\	665	\
939	if (GIMME_V != G_VOID) \	666	if (GIMME_V != G_VOID) \
940	XPUSHs (req_sv (req, AIO_REQ_KLASS));	667	XPUSHs (req_sv (req, aio_req_stash));
941		668
942	MODULE = IO::AIO PACKAGE = IO::AIO	669	MODULE = IO::AIO PACKAGE = IO::AIO
943		670
944	PROTOTYPES: ENABLE	671	PROTOTYPES: ENABLE
945		672
946	BOOT:	673	BOOT:
947	{	674	{
		675	static const struct {
		676	const char *name;
		677	IV iv;
		678	} *civ, const_iv[] = {
		679	# define const_niv(name, value) { # name, (IV) value },
		680	# define const_iv(name) { # name, (IV) name },
		681	# define const_eio(name) { # name, (IV) EIO_ ## name },
		682	const_iv (EXDEV)
		683	const_iv (ENOSYS)
		684	const_iv (O_RDONLY)
		685	const_iv (O_WRONLY)
		686	const_iv (O_RDWR)
		687	const_iv (O_CREAT)
		688	const_iv (O_TRUNC)
		689	const_iv (O_EXCL)
		690	const_iv (O_APPEND)
		691	#ifndef _WIN32
		692	const_iv (S_IFIFO)
		693	#endif
		694	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		695	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		696	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		697	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		698	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		699	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		700
		701	const_iv (ST_RDONLY)
		702	const_iv (ST_NOSUID)
		703	const_iv (ST_NODEV)
		704	const_iv (ST_NOEXEC)
		705	const_iv (ST_SYNCHRONOUS)
		706	const_iv (ST_MANDLOCK)
		707	const_iv (ST_WRITE)
		708	const_iv (ST_APPEND)
		709	const_iv (ST_IMMUTABLE)
		710	const_iv (ST_NOATIME)
		711	const_iv (ST_NODIRATIME)
		712	const_iv (ST_RELATIME)
		713
		714	const_iv (PROT_EXEC)
		715	const_iv (PROT_NONE)
		716	const_iv (PROT_READ)
		717	const_iv (PROT_WRITE)
		718
		719	/*const_iv (MAP_FIXED)*/
		720	const_iv (MAP_PRIVATE)
		721	const_iv (MAP_SHARED)
		722	const_iv (MAP_ANONYMOUS)
		723
		724	/* linuxish */
		725	const_iv (MAP_HUGETLB)
		726	const_iv (MAP_LOCKED)
		727	const_iv (MAP_NORESERVE)
		728	const_iv (MAP_POPULATE)
		729	const_iv (MAP_NONBLOCK)
		730
		731	const_iv (MCL_FUTURE)
		732	const_iv (MCL_CURRENT)
		733
		734	const_eio (MS_ASYNC)
		735	const_eio (MS_INVALIDATE)
		736	const_eio (MS_SYNC)
		737
		738	const_eio (MT_MODIFY)
		739
		740	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		741	const_eio (SYNC_FILE_RANGE_WRITE)
		742	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		743
		744	const_eio (READDIR_DENTS)
		745	const_eio (READDIR_DIRS_FIRST)
		746	const_eio (READDIR_STAT_ORDER)
		747	const_eio (READDIR_FOUND_UNKNOWN)
		748
		749	const_eio (DT_UNKNOWN)
		750	const_eio (DT_FIFO)
		751	const_eio (DT_CHR)
		752	const_eio (DT_DIR)
		753	const_eio (DT_BLK)
		754	const_eio (DT_REG)
		755	const_eio (DT_LNK)
		756	const_eio (DT_SOCK)
		757	const_eio (DT_WHT)
		758	};
		759
948	HV *stash = gv_stashpv ("IO::AIO", 1);	760	aio_stash = gv_stashpv ("IO::AIO" , 1);
949	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	761	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
950	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	762	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
951	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
952		763
		764	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		765	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		766
		767	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		768
953	create_pipe ();	769	create_respipe ();
954	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
955	}
956		770
		771	if (eio_init (want_poll, done_poll) < 0)
		772	croak ("IO::AIO: unable to initialise eio library");
		773
		774	/* atfork child called in fifo order, so before eio's handler */
		775	X_THREAD_ATFORK (0, 0, atfork_child);
		776	}
		777
957	void	778	void
958	min_parallel (nthreads)	779	max_poll_reqs (int nreqs)
959	int nthreads
960	PROTOTYPE: $	780	PROTOTYPE: $
		781	CODE:
		782	eio_set_max_poll_reqs (nreqs);
961		783
962	void	784	void
963	max_parallel (nthreads)	785	max_poll_time (double nseconds)
964	int nthreads
965	PROTOTYPE: $	786	PROTOTYPE: $
966
967	int
968	max_outstanding (nreqs)
969	int nreqs
970	PROTOTYPE: $
971	CODE:	787	CODE:
972	RETVAL = max_outstanding;	788	eio_set_max_poll_time (nseconds);
		789
		790	void
		791	min_parallel (int nthreads)
		792	PROTOTYPE: $
		793	CODE:
		794	eio_set_min_parallel (nthreads);
		795
		796	void
		797	max_parallel (int nthreads)
		798	PROTOTYPE: $
		799	CODE:
		800	eio_set_max_parallel (nthreads);
		801
		802	void
		803	max_idle (int nthreads)
		804	PROTOTYPE: $
		805	CODE:
		806	eio_set_max_idle (nthreads);
		807
		808	void
		809	max_outstanding (int maxreqs)
		810	PROTOTYPE: $
		811	CODE:
973	max_outstanding = nreqs;	812	max_outstanding = maxreqs;
974		813
975	void	814	void
976	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	815	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
977	SV * pathname
978	int flags
979	int mode
980	SV * callback
981	PROTOTYPE: $$$;$	816	PROTOTYPE: $$$;$
982	PPCODE:	817	PPCODE:
983	{	818	{
984	dREQ;	819	dREQ;
985		820
986	req->type = REQ_OPEN;	821	req->type = EIO_OPEN;
987	req->data = newSVsv (pathname);	822	req->sv1 = newSVsv (pathname);
988	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
989	req->fd = flags;	824	req->int1 = flags;
990	req->mode = mode;	825	req->int2 = mode;
991		826
992	REQ_SEND;	827	REQ_SEND;
993	}	828	}
994		829
995	void	830	void
996	aio_close (fh,callback=&PL_sv_undef)	831	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
997	SV * fh
998	SV * callback
999	PROTOTYPE: $;$	832	PROTOTYPE: $;$
1000	ALIAS:	833	ALIAS:
1001	aio_close = REQ_CLOSE
1002	aio_fsync = REQ_FSYNC	834	aio_fsync = EIO_FSYNC
1003	aio_fdatasync = REQ_FDATASYNC	835	aio_fdatasync = EIO_FDATASYNC
1004	PPCODE:	836	PPCODE:
1005	{	837	{
		838	int fd = s_fileno_croak (fh, 0);
1006	dREQ;	839	dREQ;
1007		840
1008	req->type = ix;	841	req->type = ix;
1009	req->fh = newSVsv (fh);	842	req->sv1 = newSVsv (fh);
1010	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	843	req->int1 = fd;
1011		844
1012	REQ_SEND (req);	845	REQ_SEND (req);
1013	}	846	}
1014		847
1015	void	848	void
		849	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		850	PROTOTYPE: $$$$;$
		851	PPCODE:
		852	{
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	req->type = EIO_SYNC_FILE_RANGE;
		857	req->sv1 = newSVsv (fh);
		858	req->int1 = fd;
		859	req->offs = offset;
		860	req->size = nbytes;
		861	req->int2 = flags;
		862
		863	REQ_SEND (req);
		864	}
		865
		866	void
		867	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		868	PROTOTYPE: $;$
		869	PPCODE:
		870	{
		871	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		872	int fd = s_fileno_croak (fh, 0);
		873	dREQ;
		874
		875	if (close_pipe < 0)
		876	{
		877	int pipefd [2];
		878
		879	if (pipe (pipefd) < 0
		880	|| close (pipefd [1]) < 0
		881	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		882	abort (); /*D*/
		883
		884	close_pipe = pipefd [0];
		885	}
		886
		887	req->type = EIO_DUP2;
		888	req->int1 = close_pipe;
		889	req->sv2 = newSVsv (fh);
		890	req->int2 = fd;
		891
		892	REQ_SEND (req);
		893	}
		894
		895	void
1016	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	896	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1017	SV * fh
1018	UV offset
1019	UV length
1020	SV * data
1021	UV dataoffset
1022	SV * callback
1023	ALIAS:	897	ALIAS:
1024	aio_read = REQ_READ	898	aio_read = EIO_READ
1025	aio_write = REQ_WRITE	899	aio_write = EIO_WRITE
1026	PROTOTYPE: $$$$$;$	900	PROTOTYPE: $$$$$;$
1027	PPCODE:	901	PPCODE:
1028	{	902	{
1029	aio_req req;
1030	STRLEN svlen;	903	STRLEN svlen;
		904	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1031	char *svptr = SvPVbyte (data, svlen);	905	char *svptr = SvPVbyte (data, svlen);
1032		906	UV len = SvUV (length);
1033	SvUPGRADE (data, SVt_PV);
1034	SvPOK_on (data);
1035		907
1036	if (dataoffset < 0)	908	if (dataoffset < 0)
1037	dataoffset += svlen;	909	dataoffset += svlen;
1038		910
1039	if (dataoffset < 0 || dataoffset > svlen)	911	if (dataoffset < 0 || dataoffset > svlen)
1040	croak ("data offset outside of string");	912	croak ("dataoffset outside of data scalar");
1041		913
1042	if (ix == REQ_WRITE)	914	if (ix == EIO_WRITE)
1043	{	915	{
1044	/* write: check length and adjust. */	916	/* write: check length and adjust. */
1045	if (length < 0 || length + dataoffset > svlen)	917	if (!SvOK (length) || len + dataoffset > svlen)
1046	length = svlen - dataoffset;	918	len = svlen - dataoffset;
1047	}	919	}
1048	else	920	else
1049	{	921	{
1050	/* read: grow scalar as necessary */	922	/* read: check type and grow scalar as necessary */
		923	SvUPGRADE (data, SVt_PV);
1051	svptr = SvGROW (data, length + dataoffset);	924	svptr = SvGROW (data, len + dataoffset + 1);
1052	}	925	}
1053
1054	if (length < 0)
1055	croak ("length must not be negative");
1056		926
1057	{	927	{
1058	dREQ;	928	dREQ;
1059		929
1060	req->type = ix;	930	req->type = ix;
1061	req->fh = newSVsv (fh);	931	req->sv1 = newSVsv (fh);
1062	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	932	req->int1 = fd;
1063	: IoOFP (sv_2io (fh)));	933	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1064	req->offset = offset;	934	req->size = len;
1065	req->length = length;
1066	req->data = SvREFCNT_inc (data);	935	req->sv2 = SvREFCNT_inc (data);
1067	req->dataptr = (char *)svptr + dataoffset;	936	req->ptr2 = (char *)svptr + dataoffset;
		937	req->stroffset = dataoffset;
1068		938
1069	if (!SvREADONLY (data))	939	if (!SvREADONLY (data))
1070	{	940	{
1071	SvREADONLY_on (data);	941	SvREADONLY_on (data);
1072	req->data2ptr = (void *)data;	942	req->flags |= FLAG_SV2_RO_OFF;
1073	}	943	}
1074		944
1075	REQ_SEND;	945	REQ_SEND;
1076	}	946	}
1077	}	947	}
1078		948
1079	void	949	void
		950	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		951	PROTOTYPE: $$;$
		952	PPCODE:
		953	{
		954	SV *data;
		955	dREQ;
		956
		957	req->type = EIO_READLINK;
		958	req->sv1 = newSVsv (path);
		959	req->ptr1 = SvPVbyte_nolen (req->sv1);
		960
		961	REQ_SEND;
		962	}
		963
		964	void
1080	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	965	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1081	SV * out_fh
1082	SV * in_fh
1083	UV in_offset
1084	UV length
1085	SV * callback
1086	PROTOTYPE: $$$$;$	966	PROTOTYPE: $$$$;$
1087	PPCODE:	967	PPCODE:
1088	{	968	{
		969	int ifd = s_fileno_croak (in_fh , 0);
		970	int ofd = s_fileno_croak (out_fh, 1);
1089	dREQ;	971	dREQ;
1090		972
1091	req->type = REQ_SENDFILE;	973	req->type = EIO_SENDFILE;
1092	req->fh = newSVsv (out_fh);	974	req->sv1 = newSVsv (out_fh);
1093	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	975	req->int1 = ofd;
1094	req->fh2 = newSVsv (in_fh);	976	req->sv2 = newSVsv (in_fh);
1095	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	977	req->int2 = ifd;
1096	req->offset = in_offset;	978	req->offs = in_offset;
1097	req->length = length;	979	req->size = length;
1098		980
1099	REQ_SEND;	981	REQ_SEND;
1100	}	982	}
1101		983
1102	void	984	void
1103	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	985	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1104	SV * fh
1105	UV offset
1106	IV length
1107	SV * callback
1108	PROTOTYPE: $$$;$	986	PROTOTYPE: $$$;$
1109	PPCODE:	987	PPCODE:
1110	{	988	{
		989	int fd = s_fileno_croak (fh, 0);
1111	dREQ;	990	dREQ;
1112		991
1113	req->type = REQ_READAHEAD;	992	req->type = EIO_READAHEAD;
1114	req->fh = newSVsv (fh);	993	req->sv1 = newSVsv (fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	994	req->int1 = fd;
1116	req->offset = offset;	995	req->offs = offset;
1117	req->length = length;	996	req->size = length;
1118		997
1119	REQ_SEND;	998	REQ_SEND;
1120	}	999	}
1121		1000
1122	void	1001	void
1123	aio_stat (fh_or_path,callback=&PL_sv_undef)	1002	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1124	SV * fh_or_path
1125	SV * callback
1126	ALIAS:	1003	ALIAS:
1127	aio_stat = REQ_STAT	1004	aio_stat = EIO_STAT
1128	aio_lstat = REQ_LSTAT	1005	aio_lstat = EIO_LSTAT
		1006	aio_statvfs = EIO_STATVFS
1129	PPCODE:	1007	PPCODE:
1130	{	1008	{
1131	dREQ;	1009	dREQ;
1132		1010
1133	New (0, req->statdata, 1, Stat_t);	1011	req->sv1 = newSVsv (fh_or_path);
1134	if (!req->statdata)
1135	{
1136	req_free (req);
1137	croak ("out of memory during aio_req->statdata allocation");
1138	}
1139		1012
1140	if (SvPOK (fh_or_path))	1013	if (SvPOK (req->sv1))
1141	{	1014	{
1142	req->type = ix;	1015	req->type = ix;
1143	req->data = newSVsv (fh_or_path);
1144	req->dataptr = SvPVbyte_nolen (req->data);	1016	req->ptr1 = SvPVbyte_nolen (req->sv1);
1145	}	1017	}
1146	else	1018	else
1147	{	1019	{
1148	req->type = REQ_FSTAT;	1020	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1149	req->fh = newSVsv (fh_or_path);
1150	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1021	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1151	}	1022	}
1152		1023
1153	REQ_SEND;	1024	REQ_SEND;
1154	}	1025	}
1155		1026
1156	void	1027	void
		1028	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1034	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1035	req->sv1 = newSVsv (fh_or_path);
		1036
		1037	if (SvPOK (req->sv1))
		1038	{
		1039	req->type = EIO_UTIME;
		1040	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1041	}
		1042	else
		1043	{
		1044	req->type = EIO_FUTIME;
		1045	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1046	}
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1053	PPCODE:
		1054	{
		1055	dREQ;
		1056
		1057	req->sv1 = newSVsv (fh_or_path);
		1058	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1059
		1060	if (SvPOK (req->sv1))
		1061	{
		1062	req->type = EIO_TRUNCATE;
		1063	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1064	}
		1065	else
		1066	{
		1067	req->type = EIO_FTRUNCATE;
		1068	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1069	}
		1070
		1071	REQ_SEND;
		1072	}
		1073
		1074	void
		1075	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1076	ALIAS:
		1077	aio_chmod = EIO_CHMOD
		1078	aio_mkdir = EIO_MKDIR
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->int2 = mode;
		1084	req->sv1 = newSVsv (fh_or_path);
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = ix;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FCHMOD;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	dREQ;
		1105
		1106	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1107	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1108	req->sv1 = newSVsv (fh_or_path);
		1109
		1110	if (SvPOK (req->sv1))
		1111	{
		1112	req->type = EIO_CHOWN;
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	}
		1115	else
		1116	{
		1117	req->type = EIO_FCHOWN;
		1118	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1119	}
		1120
		1121	REQ_SEND;
		1122	}
		1123
		1124	void
		1125	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_READDIR;
		1131	req->sv1 = newSVsv (pathname);
		1132	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1133	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1134
		1135	if (flags & EIO_READDIR_DENTS)
		1136	req->int1 |= EIO_READDIR_CUSTOM2;
		1137
		1138	REQ_SEND;
		1139	}
		1140
		1141	void
1157	aio_unlink (pathname,callback=&PL_sv_undef)	1142	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1158	SV * pathname
1159	SV * callback
1160	ALIAS:	1143	ALIAS:
1161	aio_unlink = REQ_UNLINK	1144	aio_unlink = EIO_UNLINK
1162	aio_rmdir = REQ_RMDIR	1145	aio_rmdir = EIO_RMDIR
1163	aio_readdir = REQ_READDIR	1146	aio_readdir = EIO_READDIR
1164	PPCODE:	1147	PPCODE:
1165	{	1148	{
1166	dREQ;	1149	dREQ;
1167		1150
1168	req->type = ix;	1151	req->type = ix;
1169	req->data = newSVsv (pathname);	1152	req->sv1 = newSVsv (pathname);
1170	req->dataptr = SvPVbyte_nolen (req->data);	1153	req->ptr1 = SvPVbyte_nolen (req->sv1);
1171		1154
1172	REQ_SEND;	1155	REQ_SEND;
1173	}	1156	}
1174		1157
1175	void	1158	void
1176	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1159	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1177	SV * oldpath
1178	SV * newpath
1179	SV * callback
1180	ALIAS:	1160	ALIAS:
1181	aio_link = REQ_LINK	1161	aio_link = EIO_LINK
1182	aio_symlink = REQ_SYMLINK	1162	aio_symlink = EIO_SYMLINK
1183	aio_rename = REQ_RENAME	1163	aio_rename = EIO_RENAME
1184	PPCODE:	1164	PPCODE:
1185	{	1165	{
1186	dREQ;	1166	dREQ;
1187		1167
1188	req->type = ix;	1168	req->type = ix;
1189	req->fh = newSVsv (oldpath);	1169	req->sv1 = newSVsv (oldpath);
1190	req->data2ptr = SvPVbyte_nolen (req->fh);	1170	req->ptr1 = SvPVbyte_nolen (req->sv1);
1191	req->data = newSVsv (newpath);	1171	req->sv2 = newSVsv (newpath);
1192	req->dataptr = SvPVbyte_nolen (req->data);	1172	req->ptr2 = SvPVbyte_nolen (req->sv2);
1193		1173
1194	REQ_SEND;	1174	REQ_SEND;
1195	}	1175	}
1196		1176
1197	void	1177	void
1198	aio_sleep (delay,callback=&PL_sv_undef)	1178	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1199	double delay
1200	SV * callback
1201	PPCODE:	1179	PPCODE:
1202	{	1180	{
1203	dREQ;	1181	dREQ;
1204		1182
1205	req->type = REQ_SLEEP;	1183	req->type = EIO_MKNOD;
1206	req->fd = delay < 0. ? 0 : delay;	1184	req->sv1 = newSVsv (pathname);
1207	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1185	req->ptr1 = SvPVbyte_nolen (req->sv1);
1208		1186	req->int2 = (mode_t)mode;
		1187	req->offs = dev;
		1188
1209	REQ_SEND;	1189	REQ_SEND;
1210	}	1190	}
1211		1191
1212	void	1192	void
		1193	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1194	ALIAS:
		1195	aio_mtouch = EIO_MTOUCH
		1196	aio_msync = EIO_MSYNC
		1197	PROTOTYPE: $$$$;$
		1198	PPCODE:
		1199	{
		1200	STRLEN svlen;
		1201	UV len = SvUV (length);
		1202	char *svptr = SvPVbyte (data, svlen);
		1203
		1204	if (offset < 0)
		1205	offset += svlen;
		1206
		1207	if (offset < 0 || offset > svlen)
		1208	croak ("offset outside of scalar");
		1209
		1210	if (!SvOK (length) || len + offset > svlen)
		1211	len = svlen - offset;
		1212
		1213	{
		1214	dREQ;
		1215
		1216	req->type = ix;
		1217	req->size = len;
		1218	req->sv2 = SvREFCNT_inc (data);
		1219	req->ptr2 = (char *)svptr + offset;
		1220	req->int1 = flags;
		1221
		1222	REQ_SEND;
		1223	}
		1224	}
		1225
		1226	void
		1227	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->type = EIO_BUSY;
		1233	req->nv1 = delay < 0. ? 0. : delay;
		1234
		1235	REQ_SEND;
		1236	}
		1237
		1238	void
1213	aio_group (callback=&PL_sv_undef)	1239	aio_group (SV *callback=&PL_sv_undef)
1214	SV * callback
1215	PROTOTYPE: ;$	1240	PROTOTYPE: ;$
1216	PPCODE:	1241	PPCODE:
1217	{	1242	{
1218	dREQ;	1243	dREQ;
		1244
1219	req->type = REQ_GROUP;	1245	req->type = EIO_GROUP;
		1246
1220	req_send (req);	1247	req_submit (req);
1221	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1248	XPUSHs (req_sv (req, aio_grp_stash));
1222	}	1249	}
1223		1250
1224	void	1251	void
1225	aio_nop (callback=&PL_sv_undef)	1252	aio_nop (SV *callback=&PL_sv_undef)
1226	SV * callback	1253	ALIAS:
		1254	aio_nop = EIO_NOP
		1255	aio_sync = EIO_SYNC
1227	PPCODE:	1256	PPCODE:
1228	{	1257	{
1229	dREQ;	1258	dREQ;
1230		1259
1231	req->type = REQ_NOP;	1260	req->type = ix;
1232		1261
1233	REQ_SEND;	1262	REQ_SEND;
1234	}	1263	}
		1264
		1265	int
		1266	aioreq_pri (int pri = 0)
		1267	PROTOTYPE: ;$
		1268	CODE:
		1269	RETVAL = next_pri;
		1270	if (items > 0)
		1271	{
		1272	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1273	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1274	next_pri = pri;
		1275	}
		1276	OUTPUT:
		1277	RETVAL
		1278
		1279	void
		1280	aioreq_nice (int nice = 0)
		1281	CODE:
		1282	nice = next_pri - nice;
		1283	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1284	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1285	next_pri = nice;
1235		1286
1236	void	1287	void
1237	flush ()	1288	flush ()
1238	PROTOTYPE:	1289	PROTOTYPE:
1239	CODE:	1290	CODE:
1240	while (nreqs)	1291	while (eio_nreqs ())
1241	{	1292	{
1242	poll_wait ();	1293	poll_wait ();
1243	poll_cb ();	1294	poll_cb ();
1244	}	1295	}
1245		1296
1246	void	1297	int
1247	poll()	1298	poll()
1248	PROTOTYPE:	1299	PROTOTYPE:
1249	CODE:	1300	CODE:
1250	if (nreqs)
1251	{
1252	poll_wait ();	1301	poll_wait ();
1253	poll_cb ();	1302	RETVAL = poll_cb ();
1254	}	1303	OUTPUT:
		1304	RETVAL
1255		1305
1256	int	1306	int
1257	poll_fileno()	1307	poll_fileno()
1258	PROTOTYPE:	1308	PROTOTYPE:
1259	CODE:	1309	CODE:
1260	RETVAL = respipe [0];	1310	RETVAL = s_epipe_fd (&respipe);
1261	OUTPUT:	1311	OUTPUT:
1262	RETVAL	1312	RETVAL
1263		1313
1264	int	1314	int
1265	poll_cb(...)	1315	poll_cb(...)
…		…
1271		1321
1272	void	1322	void
1273	poll_wait()	1323	poll_wait()
1274	PROTOTYPE:	1324	PROTOTYPE:
1275	CODE:	1325	CODE:
1276	if (nreqs)
1277	poll_wait ();	1326	poll_wait ();
1278		1327
1279	int	1328	int
1280	nreqs()	1329	nreqs()
1281	PROTOTYPE:	1330	PROTOTYPE:
1282	CODE:	1331	CODE:
1283	RETVAL = nreqs;	1332	RETVAL = eio_nreqs ();
1284	OUTPUT:	1333	OUTPUT:
1285	RETVAL	1334	RETVAL
1286		1335
		1336	int
		1337	nready()
		1338	PROTOTYPE:
		1339	CODE:
		1340	RETVAL = eio_nready ();
		1341	OUTPUT:
		1342	RETVAL
		1343
		1344	int
		1345	npending()
		1346	PROTOTYPE:
		1347	CODE:
		1348	RETVAL = eio_npending ();
		1349	OUTPUT:
		1350	RETVAL
		1351
		1352	int
		1353	nthreads()
		1354	PROTOTYPE:
		1355	CODE:
		1356	RETVAL = eio_nthreads ();
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	int
		1361	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1362	PROTOTYPE: $$$$
		1363	CODE:
		1364	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1365	RETVAL = posix_fadvise (fh, offset, length, advice);
		1366	#else
		1367	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1368	#endif
		1369	OUTPUT:
		1370	RETVAL
		1371
		1372	ssize_t
		1373	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1374	PROTOTYPE: $$$$
		1375	CODE:
		1376	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	void
		1381	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1382	PROTOTYPE: $$$$$;$
		1383	PPCODE:
		1384	sv_unmagic (scalar, MMAP_MAGIC);
		1385	{
		1386	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1387	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1388	if (addr == (void *)-1)
		1389	XSRETURN_NO;
		1390
		1391	/* we store the length in mg_obj, as namlen is I32 :/ */
		1392	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1393	->mg_obj = (SV *)length;
		1394
		1395	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1396	if (!(prot & PROT_WRITE))
		1397	SvREADONLY_on (scalar);
		1398
		1399	SvPVX (scalar) = (char *)addr;
		1400	SvCUR_set (scalar, length);
		1401	SvLEN_set (scalar, 0);
		1402	SvPOK_only (scalar);
		1403
		1404	XSRETURN_YES;
		1405	}
		1406
		1407	void
		1408	munmap (SV *scalar)
		1409	PROTOTYPE: $
		1410	CODE:
		1411	sv_unmagic (scalar, MMAP_MAGIC);
		1412
		1413	int
		1414	mlockall (int flags)
		1415	PROTOTYPE: $
		1416	CODE:
		1417	#if _POSIX_MEMLOCK
		1418	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1419	extern int mallopt (int, int);
		1420	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1421	#endif
		1422	mlockall (flags);
		1423	#else
		1424	RETVAL = -1;
		1425	errno = ENOSYS;
		1426	#endif
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	int
		1431	munlockall ()
		1432	PROTOTYPE:
		1433	CODE:
		1434	#if _POSIX_MEMLOCK
		1435	munlockall ();
		1436	#else
		1437	RETVAL = -1;
		1438	errno = ENOSYS;
		1439	#endif
		1440	OUTPUT:
		1441	RETVAL
		1442
		1443	void _on_next_submit (SV *cb)
		1444	CODE:
		1445	SvREFCNT_dec (on_next_submit);
		1446	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1447
1287	PROTOTYPES: DISABLE	1448	PROTOTYPES: DISABLE
1288		1449
1289	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1450	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1290		1451
1291	void	1452	void
1292	cancel (aio_req_ornot req)	1453	cancel (aio_req_ornot req)
1293	PROTOTYPE:
1294	CODE:	1454	CODE:
1295	req_cancel (req);	1455	eio_cancel (req);
1296		1456
1297	void	1457	void
1298	cb (aio_req req, SV *callback=&PL_sv_undef)	1458	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1299	CODE:	1459	PPCODE:
		1460	{
		1461	if (GIMME_V != G_VOID)
		1462	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1463
		1464	if (items > 1)
		1465	{
		1466	SV *cb_cv =get_cb (callback);
		1467
1300	SvREFCNT_dec (req->callback);	1468	SvREFCNT_dec (req->callback);
1301	req->callback = newSVsv (callback);	1469	req->callback = SvREFCNT_inc (cb_cv);
		1470	}
		1471	}
1302		1472
1303	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1304		1474
1305	void	1475	void
1306	add (aio_req grp, ...)	1476	add (aio_req grp, ...)
1307	PPCODE:	1477	PPCODE:
1308	{	1478	{
1309	int i;	1479	int i;
1310	aio_req req;
1311		1480
1312	if (grp->fd == 2)	1481	if (grp->int1 == 2)
1313	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1482	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1314		1483
1315	for (i = 1; i < items; ++i )	1484	for (i = 1; i < items; ++i )
1316	{	1485	{
		1486	aio_req req;
		1487
1317	if (GIMME_V != G_VOID)	1488	if (GIMME_V != G_VOID)
1318	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1489	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1319		1490
1320	req = SvAIO_REQ (ST (i));	1491	req = SvAIO_REQ (ST (i));
1321		1492
1322	if (req)	1493	if (req)
1323	{	1494	eio_grp_add (grp, req);
1324	++grp->length;
1325	req->grp = grp;
1326
1327	req->grp_prev = 0;
1328	req->grp_next = grp->grp_first;
1329
1330	if (grp->grp_first)
1331	grp->grp_first->grp_prev = req;
1332
1333	grp->grp_first = req;
1334	}
1335	}	1495	}
1336	}	1496	}
		1497
		1498	void
		1499	cancel_subs (aio_req_ornot req)
		1500	CODE:
		1501	req_cancel_subs (req);
1337		1502
1338	void	1503	void
1339	result (aio_req grp, ...)	1504	result (aio_req grp, ...)
1340	CODE:	1505	CODE:
1341	{	1506	{
1342	int i;	1507	int i;
		1508	AV *av;
		1509
		1510	grp->errorno = errno;
		1511
1343	AV *av = newAV ();	1512	av = newAV ();
		1513	av_extend (av, items - 1);
1344		1514
1345	for (i = 1; i < items; ++i )	1515	for (i = 1; i < items; ++i )
1346	av_push (av, newSVsv (ST (i)));	1516	av_push (av, newSVsv (ST (i)));
1347		1517
1348	SvREFCNT_dec (grp->data);	1518	SvREFCNT_dec (grp->sv1);
1349	grp->data = (SV *)av;	1519	grp->sv1 = (SV *)av;
1350	}	1520	}
1351		1521
1352	void	1522	void
		1523	errno (aio_req grp, int errorno = errno)
		1524	CODE:
		1525	grp->errorno = errorno;
		1526
		1527	void
1353	feed_limit (aio_req grp, int limit)	1528	limit (aio_req grp, int limit)
1354	CODE:	1529	CODE:
1355	grp->fd2 = limit;	1530	eio_grp_limit (grp, limit);
1356	aio_grp_feed (grp);
1357		1531
1358	void	1532	void
1359	feed (aio_req grp, SV *callback=&PL_sv_undef)	1533	feed (aio_req grp, SV *callback=&PL_sv_undef)
1360	CODE:	1534	CODE:
1361	{	1535	{
1362	SvREFCNT_dec (grp->fh2);	1536	SvREFCNT_dec (grp->sv2);
1363	grp->fh2 = newSVsv (callback);	1537	grp->sv2 = newSVsv (callback);
		1538	grp->feed = aio_grp_feed;
1364		1539
1365	if (grp->fd2 <= 0)	1540	if (grp->int2 <= 0)
1366	grp->fd2 = 2;	1541	grp->int2 = 2;
1367		1542
1368	aio_grp_feed (grp);	1543	eio_grp_limit (grp, grp->int2);
1369	}	1544	}
1370		1545

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