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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.32 by root, Mon Aug 22 23:20:37 2005 UTC vs.
Revision 1.162 by root, Sun Jan 10 23:05:12 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
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14		16	#include <sys/statvfs.h>
15	#include <unistd.h>	17	#include <limits.h>
16	#include <fcntl.h>	18	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	19	#include <sched.h>
19		20
20	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
21	# if __linux
22	# include <sys/sendfile.h>	22	# include <sys/mman.h>
23	# elif __freebsd	23	#endif
24	# include <sys/socket.h>	24
		25	#if !_POSIX_MAPPED_FILES
		26	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		27	# define munmap(addr,length) (errno = ENOSYS, -1)
		28	#endif
		29
		30	/* perl namespace pollution */
		31	#undef VERSION
		32
		33	#ifdef _WIN32
		34
		35	# define EIO_STRUCT_DIRENT Direntry_t
		36	# undef malloc
		37	# undef free
		38
		39	// perl overrides all those nice win32 functions
		40	# undef open
		41	# undef read
		42	# undef write
		43	# undef send
		44	# undef recv
		45	# undef stat
		46	# undef fstat
		47	# define lstat stat
		48	# undef truncate
		49	# undef ftruncate
		50	# undef open
		51	# undef close
		52	# undef unlink
		53	# undef rmdir
		54	# undef rename
		55	# undef lseek
		56
		57	# define chown(a,b,c) (errno = ENOSYS, -1)
		58	# define fchown(a,b,c) (errno = ENOSYS, -1)
		59	# define fchmod(a,b) (errno = ENOSYS, -1)
		60	# define symlink(a,b) (errno = ENOSYS, -1)
		61	# define readlink(a,b,c) (errno = ENOSYS, -1)
		62	# define mknod(a,b,c) (errno = ENOSYS, -1)
		63	# define truncate(a,b) (errno = ENOSYS, -1)
		64	# define ftruncate(fd,o) chsize ((fd), (o))
		65	# define fsync(fd) _commit (fd)
		66	# define opendir(fd) (errno = ENOSYS, 0)
		67	# define readdir(fd) (errno = ENOSYS, -1)
		68	# define closedir(fd) (errno = ENOSYS, -1)
		69	# define mkdir(a,b) mkdir (a)
		70
		71	#else
		72
25	# include <sys/uio.h>	73	# include <sys/time.h>
26	# elif __hpux
27	# include <sys/socket.h>	74	# include <sys/select.h>
		75	# include <unistd.h>
		76	# include <utime.h>
		77	# include <signal.h>
		78	# define EIO_STRUCT_DIRENT struct dirent
		79
		80	#endif
		81
		82	/* perl stupidly overrides readdir and maybe others */
		83	/* with thread-unsafe versions, imagine that :( */
		84	#undef readdir
		85	#undef opendir
		86	#undef closedir
		87
		88	#define EIO_STRUCT_STAT Stat_t
		89
		90	/* use NV for 32 bit perls as it allows larger offsets */
		91	#if IVSIZE >= 8
		92	# define VAL64 IV
		93	# define SvVAL64 SvIV
		94	# define newSVval64 newSViv
		95	#else
		96	# define VAL64 NV
		97	# define SvVAL64 SvNV
		98	# define newSVval64 newSVnv
		99	#endif
		100
		101	/*****************************************************************************/
		102
		103	#if __GNUC__ >= 3
		104	# define expect(expr,value) __builtin_expect ((expr),(value))
		105	#else
		106	# define expect(expr,value) (expr)
		107	#endif
		108
		109	#define expect_false(expr) expect ((expr) != 0, 0)
		110	#define expect_true(expr) expect ((expr) != 0, 1)
		111
		112	/*****************************************************************************/
		113
		114	typedef SV SV8; /* byte-sv, used for argument-checking */
		115	typedef int aio_rfd; /* read file desriptor */
		116	typedef int aio_wfd; /* write file descriptor */
		117
		118	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		119
		120	#define EIO_REQ_MEMBERS \
		121	SV *callback; \
		122	SV *sv1, *sv2; \
		123	STRLEN stroffset; \
		124	SV *self;
		125
		126	#define EIO_NO_WRAPPERS 1
		127
		128	#include "libeio/eio.h"
		129
		130	#ifndef POSIX_FADV_NORMAL
		131	# define POSIX_FADV_NORMAL 0
		132	# define NO_FADVISE 1
		133	#endif
		134	#ifndef POSIX_FADV_SEQUENTIAL
		135	# define POSIX_FADV_SEQUENTIAL 0
		136	#endif
		137	#ifndef POSIX_FADV_RANDOM
		138	# define POSIX_FADV_RANDOM 0
		139	#endif
		140	#ifndef POSIX_FADV_NOREUSE
		141	# define POSIX_FADV_NOREUSE 0
		142	#endif
		143	#ifndef POSIX_FADV_WILLNEED
		144	# define POSIX_FADV_WILLNEED 0
		145	#endif
		146	#ifndef POSIX_FADV_DONTNEED
		147	# define POSIX_FADV_DONTNEED 0
		148	#endif
		149
		150	#ifndef ST_NODEV
		151	# define ST_NODEV 0
		152	#endif
		153	#ifndef ST_NOEXEC
		154	# define ST_NOEXEC 0
		155	#endif
		156	#ifndef ST_SYNCHRONOUS
		157	# define ST_SYNCHRONOUS 0
		158	#endif
		159	#ifndef ST_MANDLOCK
		160	# define ST_MANDLOCK 0
		161	#endif
		162	#ifndef ST_WRITE
		163	# define ST_WRITE 0
		164	#endif
		165	#ifndef ST_APPEND
		166	# define ST_APPEND 0
		167	#endif
		168	#ifndef ST_IMMUTABLE
		169	# define ST_IMMUTABLE 0
		170	#endif
		171	#ifndef ST_NOATIME
		172	# define ST_NOATIME 0
		173	#endif
		174	#ifndef ST_NODIRATIME
		175	# define ST_NODIRATIME 0
		176	#endif
		177	#ifndef ST_RELATIME
		178	# define ST_RELATIME 0
		179	#endif
		180
		181	#ifndef MCL_CURRENT
		182	# define MCL_CURRENT 0
		183	#endif
		184	#ifndef MCL_FUTURE
		185	# define MCL_FUTURE 0
		186	#endif
		187
		188	#ifndef MAP_ANONYMOUS
		189	# ifdef MAP_ANON
		190	# define MAP_ANONYMOUS MAP_ANON
		191	# else
		192	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	# endif	193	# endif
29	#endif	194	#endif
30		195	#ifndef MAP_HUGETLB
31	#if __ia64	196	# define MAP_HUGETLB 0
32	# define STACKSIZE 65536
33	#else
34	# define STACKSIZE 4096
35	#endif	197	#endif
		198	#ifndef MAP_LOCKED
		199	# define MAP_LOCKED 0
		200	#endif
		201	#ifndef MAP_NORESERVE
		202	# define MAP_NORESERVE 0
		203	#endif
		204	#ifndef MAP_POPULATE
		205	# define MAP_POPULATE 0
		206	#endif
		207	#ifndef MAP_NONBLOCK
		208	# define MAP_NONBLOCK 0
		209	#endif
		210
		211	#ifndef PAGESIZE
		212	# define PAGESIZE sysconf (_SC_PAGESIZE)
		213	#endif
		214
		215	static int req_invoke (eio_req *req);
		216	#define EIO_FINISH(req) req_invoke (req)
		217	static void req_destroy (eio_req *grp);
		218	#define EIO_DESTROY(req) req_destroy (req)
36		219
37	enum {	220	enum {
38	REQ_QUIT,	221	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	222	};
47		223
48	typedef struct aio_cb {	224	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		225
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	226	typedef eio_req *aio_req;
		227	typedef eio_req *aio_req_ornot;
68		228
69	static int started, wanted;	229	static SV *on_next_submit;
70	static volatile int nreqs;	230	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	231	static int max_outstanding;
72	static int respipe [2];
73		232
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	233	static s_epipe respipe;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		234
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	235	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	236	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		237
		238	static void want_poll (void)
		239	{
		240	/* write a dummy byte to the pipe so fh becomes ready */
		241	s_epipe_signal (&respipe);
		242	}
		243
		244	static void done_poll (void)
		245	{
		246	/* read any signals sent by the worker threads */
		247	s_epipe_drain (&respipe);
		248	}
		249
		250	/* must be called at most once */
		251	static SV *req_sv (aio_req req, HV *stash)
		252	{
		253	if (!req->self)
		254	{
		255	req->self = (SV *)newHV ();
		256	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		257	}
		258
		259	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		260	}
		261
		262	static aio_req SvAIO_REQ (SV *sv)
		263	{
		264	MAGIC *mg;
		265
		266	if (!SvROK (sv)
		267	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		268	&& SvSTASH (SvRV (sv)) != aio_req_stash
		269	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		270	croak ("object of class IO::AIO::REQ expected");
		271
		272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		273
		274	return mg ? (aio_req)mg->mg_ptr : 0;
		275	}
		276
		277	static void aio_grp_feed (aio_req grp)
		278	{
		279	if (grp->sv2 && SvOK (grp->sv2))
		280	{
		281	dSP;
		282
		283	ENTER;
		284	SAVETMPS;
		285	PUSHMARK (SP);
		286	XPUSHs (req_sv (grp, aio_grp_stash));
		287	PUTBACK;
		288	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		289	SPAGAIN;
		290	FREETMPS;
		291	LEAVE;
		292	}
		293	}
		294
		295	static void req_submit (eio_req *req)
		296	{
		297	eio_submit (req);
		298
		299	if (expect_false (on_next_submit))
		300	{
		301	dSP;
		302	SV *cb = sv_2mortal (on_next_submit);
		303
		304	on_next_submit = 0;
		305
		306	PUSHMARK (SP);
		307	PUTBACK;
		308	call_sv (cb, G_DISCARD | G_EVAL);
		309	}
		310	}
		311
		312	static int req_invoke (eio_req *req)
		313	{
		314	dSP;
		315
		316	if (req->flags & FLAG_SV2_RO_OFF)
		317	SvREADONLY_off (req->sv2);
		318
		319	if (!EIO_CANCELLED (req) && req->callback)
		320	{
		321	ENTER;
		322	SAVETMPS;
		323	PUSHMARK (SP);
		324	EXTEND (SP, 1);
		325
		326	switch (req->type)
		327	{
		328	case EIO_READDIR:
		329	{
		330	SV *rv = &PL_sv_undef;
		331
		332	if (req->result >= 0)
		333	{
		334	int i;
		335	char *names = (char *)req->ptr2;
		336	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		337	AV *av = newAV ();
		338
		339	av_extend (av, req->result - 1);
		340
		341	for (i = 0; i < req->result; ++i)
		342	{
		343	if (req->int1 & EIO_READDIR_DENTS)
		344	{
		345	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		346
		347	if (req->int1 & EIO_READDIR_CUSTOM2)
		348	{
		349	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		350	AV *avent = newAV ();
		351
		352	av_extend (avent, 2);
		353
		354	if (!sv_type [ent->type])
		355	{
		356	sv_type [ent->type] = newSViv (ent->type);
		357	SvREADONLY_on (sv_type [ent->type]);
		358	}
		359
		360	av_store (avent, 0, namesv);
		361	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		362	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		363
		364	av_store (av, i, newRV_noinc ((SV *)avent));
		365	}
		366	else
		367	av_store (av, i, namesv);
		368
		369	++ent;
		370	}
		371	else
		372	{
		373	SV *name = newSVpv (names, 0);
		374	av_store (av, i, name);
		375	names += SvCUR (name) + 1;
		376	}
		377	}
		378
		379	rv = sv_2mortal (newRV_noinc ((SV *)av));
		380	}
		381
		382	PUSHs (rv);
		383
		384	if (req->int1 & EIO_READDIR_CUSTOM1)
		385	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		386	}
		387	break;
		388
		389	case EIO_OPEN:
		390	{
		391	/* convert fd to fh */
		392	SV *fh = &PL_sv_undef;
		393
		394	if (req->result >= 0)
		395	{
		396	GV *gv = (GV *)sv_newmortal ();
		397	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		398	char sym [64];
		399	int symlen;
		400
		401	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		402	gv_init (gv, aio_stash, sym, symlen, 0);
		403
		404	symlen = snprintf (
		405	sym,
		406	sizeof (sym),
		407	"%s&=%d",
		408	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		409	(int)req->result
		410	);
		411
		412	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		413	fh = (SV *)gv;
		414	}
		415
		416	PUSHs (fh);
		417	}
		418	break;
		419
		420	case EIO_STATVFS:
		421	case EIO_FSTATVFS:
		422	{
		423	SV *rv = &PL_sv_undef;
		424
		425	if (req->result >= 0)
		426	{
		427	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		428	HV *hv = newHV ();
		429
		430	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		431
		432	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		433	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		434	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		435	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		436	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		437	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		438	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		439	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		440	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		441	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		442	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		443	}
		444
		445	PUSHs (rv);
		446	}
		447
		448	break;
		449
		450	case EIO_GROUP:
		451	req->int1 = 2; /* mark group as finished */
		452
		453	if (req->sv1)
		454	{
		455	int i;
		456	AV *av = (AV *)req->sv1;
		457
		458	EXTEND (SP, AvFILL (av) + 1);
		459	for (i = 0; i <= AvFILL (av); ++i)
		460	PUSHs (*av_fetch (av, i, 0));
		461	}
		462	break;
		463
		464	case EIO_NOP:
		465	case EIO_BUSY:
		466	break;
		467
		468	case EIO_READLINK:
		469	if (req->result > 0)
		470	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		471	break;
		472
		473	case EIO_STAT:
		474	case EIO_LSTAT:
		475	case EIO_FSTAT:
		476	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		477	PL_laststatval = req->result;
		478	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		479	PUSHs (sv_2mortal (newSViv (req->result)));
		480	break;
		481
		482	case EIO_READ:
		483	{
		484	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		485	*SvEND (req->sv2) = 0;
		486	SvPOK_only (req->sv2);
		487	SvSETMAGIC (req->sv2);
		488	PUSHs (sv_2mortal (newSViv (req->result)));
		489	}
		490	break;
		491
		492	case EIO_DUP2:
		493	if (req->result > 0)
		494	req->result = 0;
		495	/* FALLTHROUGH */
		496
		497	default:
		498	PUSHs (sv_2mortal (newSViv (req->result)));
		499	break;
		500	}
		501
		502	errno = req->errorno;
		503
		504	PUTBACK;
		505	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		506	SPAGAIN;
		507
		508	FREETMPS;
		509	LEAVE;
		510
		511	PUTBACK;
		512	}
		513
		514	return !!SvTRUE (ERRSV);
		515	}
		516
		517	static void req_destroy (aio_req req)
		518	{
86	if (req->fh)	519	if (req->self)
		520	{
		521	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	522	SvREFCNT_dec (req->self);
		523	}
88		524
89	if (req->fh2)	525	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	526	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	527	SvREFCNT_dec (req->callback);
97		528
98	Safefree (req);	529	Safefree (req);
99	}	530	}
100		531
		532	static void req_cancel_subs (aio_req grp)
		533	{
		534	aio_req sub;
		535
		536	if (grp->type != EIO_GROUP)
		537	return;
		538
		539	SvREFCNT_dec (grp->sv2);
		540	grp->sv2 = 0;
		541
		542	eio_grp_cancel (grp);
		543	}
		544
101	static void	545	static void
102	poll_wait ()	546	create_respipe (void)
103	{	547	{
104	if (nreqs && !ress)	548	if (s_epipe_renew (&respipe))
		549	croak ("IO::AIO: unable to initialize result pipe");
		550	}
		551
		552	static void poll_wait (void)
		553	{
		554	while (eio_nreqs ())
105	{	555	{
106	fd_set rfd;	556	int size;
107	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);
109		557
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	558	X_LOCK (reslock);
		559	size = res_queue.size;
		560	X_UNLOCK (reslock);
		561
		562	if (size)
		563	return;
		564
		565	etp_maybe_start_thread ();
		566
		567	s_epipe_wait (&respipe);
111	}	568	}
112	}	569	}
113		570
114	static int	571	static int poll_cb (void)
115	poll_cb ()
116	{	572	{
117	dSP;
118	int count = 0;
119	int do_croak = 0;
120	aio_req req;
121
122	for (;;)	573	for (;;)
123	{	574	{
124	pthread_mutex_lock (&reslock);	575	int res = eio_poll ();
125	req = ress;
126		576
127	if (req)	577	if (res > 0)
128	{
129	ress = req->next;
130
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);	578	croak (0);
198	}
199	}
200		579
201	LEAVE;	580	if (!max_outstanding || max_outstanding > eio_nreqs ())
		581	return res;
202		582
203	errno = errorno;	583	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	584	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	585	}
329		586
330	static void atfork_child (void)	587	static void atfork_child (void)
331	{	588	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();	589	create_respipe ();
357
358	atfork_parent ();
359	}	590	}
360		591
361	/*****************************************************************************/	592	/*****************************************************************************/
362	/* work around various missing functions */
363		593
364	#if !HAVE_PREADWRITE	594	#define MMAP_MAGIC PERL_MAGIC_ext
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367		595
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t	596	static int
376	pread (int fd, void *buf, size_t count, off_t offset)	597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
377	{	598	{
378	ssize_t res;	599	int old_errno = errno;
379	off_t ooffset;	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		601	errno = old_errno;
380		602
381	pthread_mutex_lock (&iolock);	603	mg->mg_obj = 0; /* just in case */
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387		604
388	return res;	605	SvREADONLY_off (sv);
389	}	606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
390		610
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&iolock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;	611	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	res = sbytes;
456	}
457
458	#elif __hpux
459	res = sendfile (ofd, ifd, offset, count, 0, 0);
460
461	#else
462	res = -1;
463	errno = ENOSYS;
464	#endif
465
466	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
467	{
468	/* emulate sendfile. this is a major pain in the ass */
469	char *buf = malloc (4096);
470	res = 0;
471
472	for (;;)
473	{
474	ssize_t cnt;
475
476	cnt = pread (ifd, buf, 4096, offset);
477
478	if (cnt <= 0)
479	{
480	if (cnt && !res) res = -1;
481	break;
482	}
483
484	cnt = write (ofd, buf, cnt);
485
486	if (cnt <= 0)
487	{
488	if (cnt && !res) res = -1;
489	break;
490	}
491
492	offset += cnt;
493	res += cnt;
494	}
495
496	{
497	int errorno = errno;
498	free (buf);
499	errno = errorno;
500	}
501	}
502
503	return res;
504	}	612	}
		613
		614	static MGVTBL mmap_vtbl = {
		615	0, 0, 0, 0, mmap_free
		616	};
505		617
506	/*****************************************************************************/	618	/*****************************************************************************/
507		619
508	static void *	620	static SV *
509	aio_proc (void *thr_arg)	621	get_cb (SV *cb_sv)
510	{	622	{
511	aio_req req;	623	SvGETMAGIC (cb_sv);
512	int type;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
513
514	do
515	{
516	pthread_mutex_lock (&reqlock);
517
518	for (;;)
519	{
520	req = reqs;
521
522	if (reqs)
523	{
524	reqs = reqs->next;
525	if (!reqs) reqe = 0;
526	}
527
528	if (req)
529	break;
530
531	pthread_cond_wait (&reqwait, &reqlock);
532	}
533
534	pthread_mutex_unlock (&reqlock);
535
536	errno = 0; /* strictly unnecessary */
537
538	type = req->type;
539
540	switch (type)
541	{
542	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
543	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
544
545	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
546	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
547
548	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
549	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
550	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
551
552	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
553	case REQ_CLOSE: req->result = close (req->fd); break;
554	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
556	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
557
558	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
559	case REQ_FSYNC: req->result = fsync (req->fd); break;
560
561	case REQ_QUIT:
562	break;
563
564	default:
565	req->result = ENOSYS;
566	break;
567	}
568
569	req->errorno = errno;
570
571	pthread_mutex_lock (&reslock);
572
573	req->next = 0;
574
575	if (rese)
576	{
577	rese->next = req;
578	rese = req;
579	}
580	else
581	{
582	rese = ress = req;
583
584	/* write a dummy byte to the pipe so fh becomes ready */
585	write (respipe [1], &respipe, 1);
586	}
587
588	pthread_mutex_unlock (&reslock);
589	}
590	while (type != REQ_QUIT);
591
592	return 0;
593	}	625	}
594		626
595	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
596	aio_req req; \	629	aio_req req; \
		630	int req_pri = next_pri; \
		631	next_pri = EIO_PRI_DEFAULT; \
597	\	632	\
598	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
599	croak ("clalback must be undef or of reference type"); \
600	\	634	\
601	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
602	if (!req) \	636	if (!req) \
603	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
604	\	638	\
605	req->callback = newSVsv (callback);	639	req->callback = SvREFCNT_inc (cb_cv); \
606		640	req->pri = req_pri
		641
		642	#define REQ_SEND \
		643	PUTBACK; \
		644	req_submit (req); \
		645	SPAGAIN; \
		646	\
		647	if (GIMME_V != G_VOID) \
		648	XPUSHs (req_sv (req, aio_req_stash));
		649
607	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
608		651
609	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
610		653
611	BOOT:	654	BOOT:
612	{	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
		738	aio_stash = gv_stashpv ("IO::AIO" , 1);
		739	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		740	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		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
613	create_pipe ();	747	create_respipe ();
614	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
615	}
616		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
617	void	756	void
618	min_parallel(nthreads)	757	max_poll_reqs (int nreqs)
619	int nthreads
620	PROTOTYPE: $	758	PROTOTYPE: $
		759	CODE:
		760	eio_set_max_poll_reqs (nreqs);
621		761
622	void	762	void
623	max_parallel(nthreads)	763	max_poll_time (double nseconds)
624	int nthreads
625	PROTOTYPE: $	764	PROTOTYPE: $
626
627	int
628	max_outstanding(nreqs)
629	int nreqs
630	PROTOTYPE: $
631	CODE:	765	CODE:
632	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:
633	max_outstanding = nreqs;	790	max_outstanding = maxreqs;
634		791
635	void	792	void
636	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	793	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
637	SV * pathname
638	int flags
639	int mode
640	SV * callback
641	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
642	CODE:	795	PPCODE:
643	{	796	{
644	dREQ;	797	dREQ;
645		798
646	req->type = REQ_OPEN;	799	req->type = EIO_OPEN;
647	req->data = newSVsv (pathname);	800	req->sv1 = newSVsv (pathname);
648	req->dataptr = SvPVbyte_nolen (req->data);	801	req->ptr1 = SvPVbyte_nolen (req->sv1);
649	req->fd = flags;	802	req->int1 = flags;
650	req->mode = mode;	803	req->int2 = mode;
651		804
652	send_req (req);	805	REQ_SEND;
653	}	806	}
654		807
655	void	808	void
656	aio_close(fh,callback=&PL_sv_undef)	809	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
657	SV * fh
658	SV * callback
659	PROTOTYPE: $;$	810	PROTOTYPE: $;$
660	ALIAS:	811	ALIAS:
661	aio_close = REQ_CLOSE
662	aio_fsync = REQ_FSYNC	812	aio_fsync = EIO_FSYNC
663	aio_fdatasync = REQ_FDATASYNC	813	aio_fdatasync = EIO_FDATASYNC
664	CODE:	814	PPCODE:
665	{	815	{
		816	int fd = s_fileno_croak (fh, 0);
666	dREQ;	817	dREQ;
667		818
668	req->type = ix;	819	req->type = ix;
669	req->fh = newSVsv (fh);	820	req->sv1 = newSVsv (fh);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	821	req->int1 = fd;
671		822
672	send_req (req);	823	REQ_SEND (req);
673	}	824	}
674		825
675	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: $$$$;$
		829	PPCODE:
		830	{
		831	int fd = s_fileno_croak (fh, 0);
		832	dREQ;
		833
		834	req->type = EIO_SYNC_FILE_RANGE;
		835	req->sv1 = newSVsv (fh);
		836	req->int1 = fd;
		837	req->offs = offset;
		838	req->size = nbytes;
		839	req->int2 = flags;
		840
		841	REQ_SEND (req);
		842	}
		843
		844	void
		845	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		846	PROTOTYPE: $;$
		847	PPCODE:
		848	{
		849	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		850	int fd = s_fileno_croak (fh, 0);
		851	dREQ;
		852
		853	if (close_pipe < 0)
		854	{
		855	int pipefd [2];
		856
		857	if (pipe (pipefd) < 0
		858	|| close (pipefd [1]) < 0
		859	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		860	abort (); /*D*/
		861
		862	close_pipe = pipefd [0];
		863	}
		864
		865	req->type = EIO_DUP2;
		866	req->int1 = close_pipe;
		867	req->sv2 = newSVsv (fh);
		868	req->int2 = fd;
		869
		870	REQ_SEND (req);
		871	}
		872
		873	void
676	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	874	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
677	SV * fh
678	UV offset
679	UV length
680	SV * data
681	UV dataoffset
682	SV * callback
683	ALIAS:	875	ALIAS:
684	aio_read = REQ_READ	876	aio_read = EIO_READ
685	aio_write = REQ_WRITE	877	aio_write = EIO_WRITE
686	PROTOTYPE: $$$$$;$	878	PROTOTYPE: $$$$$;$
687	CODE:	879	PPCODE:
688	{	880	{
689	aio_req req;
690	STRLEN svlen;	881	STRLEN svlen;
		882	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
691	char *svptr = SvPVbyte (data, svlen);	883	char *svptr = SvPVbyte (data, svlen);
692		884	UV len = SvUV (length);
693	SvUPGRADE (data, SVt_PV);
694	SvPOK_on (data);
695		885
696	if (dataoffset < 0)	886	if (dataoffset < 0)
697	dataoffset += svlen;	887	dataoffset += svlen;
698		888
699	if (dataoffset < 0 || dataoffset > svlen)	889	if (dataoffset < 0 || dataoffset > svlen)
700	croak ("data offset outside of string");	890	croak ("dataoffset outside of data scalar");
701		891
702	if (ix == REQ_WRITE)	892	if (ix == EIO_WRITE)
703	{	893	{
704	/* write: check length and adjust. */	894	/* write: check length and adjust. */
705	if (length < 0 || length + dataoffset > svlen)	895	if (!SvOK (length) || len + dataoffset > svlen)
706	length = svlen - dataoffset;	896	len = svlen - dataoffset;
707	}	897	}
708	else	898	else
709	{	899	{
710	/* read: grow scalar as necessary */	900	/* read: check type and grow scalar as necessary */
		901	SvUPGRADE (data, SVt_PV);
711	svptr = SvGROW (data, length + dataoffset);	902	svptr = SvGROW (data, len + dataoffset + 1);
712	}	903	}
713
714	if (length < 0)
715	croak ("length must not be negative");
716		904
717	{	905	{
718	dREQ;	906	dREQ;
719		907
720	req->type = ix;	908	req->type = ix;
721	req->fh = newSVsv (fh);	909	req->sv1 = newSVsv (fh);
722	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	910	req->int1 = fd;
723	: IoOFP (sv_2io (fh)));	911	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
724	req->offset = offset;	912	req->size = len;
725	req->length = length;
726	req->data = SvREFCNT_inc (data);	913	req->sv2 = SvREFCNT_inc (data);
727	req->dataptr = (char *)svptr + dataoffset;	914	req->ptr2 = (char *)svptr + dataoffset;
		915	req->stroffset = dataoffset;
728		916
729	if (!SvREADONLY (data))	917	if (!SvREADONLY (data))
730	{	918	{
731	SvREADONLY_on (data);	919	SvREADONLY_on (data);
732	req->data2ptr = (void *)data;	920	req->flags |= FLAG_SV2_RO_OFF;
733	}	921	}
734		922
735	send_req (req);	923	REQ_SEND;
736	}	924	}
737	}	925	}
738		926
739	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
740	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)
741	SV * out_fh
742	SV * in_fh
743	UV in_offset
744	UV length
745	SV * callback
746	PROTOTYPE: $$$$;$	944	PROTOTYPE: $$$$;$
747	CODE:	945	PPCODE:
748	{	946	{
		947	int ifd = s_fileno_croak (in_fh , 0);
		948	int ofd = s_fileno_croak (out_fh, 1);
749	dREQ;	949	dREQ;
750		950
751	req->type = REQ_SENDFILE;	951	req->type = EIO_SENDFILE;
752	req->fh = newSVsv (out_fh);	952	req->sv1 = newSVsv (out_fh);
753	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	953	req->int1 = ofd;
754	req->fh2 = newSVsv (in_fh);	954	req->sv2 = newSVsv (in_fh);
755	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	955	req->int2 = ifd;
756	req->offset = in_offset;	956	req->offs = in_offset;
757	req->length = length;	957	req->size = length;
758		958
759	send_req (req);	959	REQ_SEND;
760	}	960	}
761		961
762	void	962	void
763	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	963	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
764	SV * fh
765	UV offset
766	IV length
767	SV * callback
768	PROTOTYPE: $$$;$	964	PROTOTYPE: $$$;$
769	CODE:	965	PPCODE:
770	{	966	{
		967	int fd = s_fileno_croak (fh, 0);
771	dREQ;	968	dREQ;
772		969
773	req->type = REQ_READAHEAD;	970	req->type = EIO_READAHEAD;
774	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
775	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	972	req->int1 = fd;
776	req->offset = offset;	973	req->offs = offset;
777	req->length = length;	974	req->size = length;
778		975
779	send_req (req);	976	REQ_SEND;
780	}	977	}
781		978
782	void	979	void
783	aio_stat(fh_or_path,callback=&PL_sv_undef)	980	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
784	SV * fh_or_path
785	SV * callback
786	ALIAS:	981	ALIAS:
787	aio_stat = REQ_STAT	982	aio_stat = EIO_STAT
788	aio_lstat = REQ_LSTAT	983	aio_lstat = EIO_LSTAT
		984	aio_statvfs = EIO_STATVFS
789	CODE:	985	PPCODE:
790	{	986	{
791	dREQ;	987	dREQ;
792		988
793	New (0, req->statdata, 1, Stat_t);	989	req->sv1 = newSVsv (fh_or_path);
794	if (!req->statdata)
795	{
796	free_req (req);
797	croak ("out of memory during aio_req->statdata allocation");
798	}
799		990
800	if (SvPOK (fh_or_path))	991	if (SvPOK (req->sv1))
801	{	992	{
802	req->type = ix;	993	req->type = ix;
803	req->data = newSVsv (fh_or_path);
804	req->dataptr = SvPVbyte_nolen (req->data);	994	req->ptr1 = SvPVbyte_nolen (req->sv1);
805	}	995	}
806	else	996	else
807	{	997	{
808	req->type = REQ_FSTAT;	998	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
809	req->fh = newSVsv (fh_or_path);
810	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	999	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
811	}	1000	}
812		1001
813	send_req (req);	1002	REQ_SEND;
814	}	1003	}
815		1004
816	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
817	aio_unlink(pathname,callback=&PL_sv_undef)	1120	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
818	SV * pathname
819	SV * callback
820	ALIAS:	1121	ALIAS:
821	aio_unlink = REQ_UNLINK	1122	aio_unlink = EIO_UNLINK
822	aio_rmdir = REQ_RMDIR	1123	aio_rmdir = EIO_RMDIR
		1124	aio_readdir = EIO_READDIR
823	CODE:	1125	PPCODE:
824	{	1126	{
825	dREQ;	1127	dREQ;
826		1128
827	req->type = ix;	1129	req->type = ix;
828	req->data = newSVsv (pathname);	1130	req->sv1 = newSVsv (pathname);
829	req->dataptr = SvPVbyte_nolen (req->data);	1131	req->ptr1 = SvPVbyte_nolen (req->sv1);
830
831	send_req (req);
832	}
833		1132
		1133	REQ_SEND;
		1134	}
		1135
834	void	1136	void
835	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1137	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
836	SV * oldpath	1138	ALIAS:
837	SV * newpath	1139	aio_link = EIO_LINK
838	SV * callback	1140	aio_symlink = EIO_SYMLINK
		1141	aio_rename = EIO_RENAME
839	CODE:	1142	PPCODE:
840	{	1143	{
841	dREQ;	1144	dREQ;
842		1145
843	req->type = REQ_SYMLINK;	1146	req->type = ix;
844	req->fh = newSVsv (oldpath);	1147	req->sv1 = newSVsv (oldpath);
845	req->data2ptr = SvPVbyte_nolen (req->fh);	1148	req->ptr1 = SvPVbyte_nolen (req->sv1);
846	req->data = newSVsv (newpath);	1149	req->sv2 = newSVsv (newpath);
847	req->dataptr = SvPVbyte_nolen (req->data);	1150	req->ptr2 = SvPVbyte_nolen (req->sv2);
848		1151
849	send_req (req);	1152	REQ_SEND;
850	}	1153	}
851		1154
852	void	1155	void
		1156	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1157	PPCODE:
		1158	{
		1159	dREQ;
		1160
		1161	req->type = EIO_MKNOD;
		1162	req->sv1 = newSVsv (pathname);
		1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1164	req->int2 = (mode_t)mode;
		1165	req->offs = dev;
		1166
		1167	REQ_SEND;
		1168	}
		1169
		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
		1217	aio_group (SV *callback=&PL_sv_undef)
		1218	PROTOTYPE: ;$
		1219	PPCODE:
		1220	{
		1221	dREQ;
		1222
		1223	req->type = EIO_GROUP;
		1224
		1225	req_submit (req);
		1226	XPUSHs (req_sv (req, aio_grp_stash));
		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;
		1264
		1265	void
853	flush()	1266	flush ()
854	PROTOTYPE:	1267	PROTOTYPE:
855	CODE:	1268	CODE:
856	while (nreqs)	1269	while (eio_nreqs ())
857	{	1270	{
858	poll_wait ();	1271	poll_wait ();
859	poll_cb ();	1272	poll_cb ();
860	}	1273	}
861		1274
862	void	1275	int
863	poll()	1276	poll()
864	PROTOTYPE:	1277	PROTOTYPE:
865	CODE:	1278	CODE:
866	if (nreqs)
867	{
868	poll_wait ();	1279	poll_wait ();
869	poll_cb ();	1280	RETVAL = poll_cb ();
870	}	1281	OUTPUT:
		1282	RETVAL
871		1283
872	int	1284	int
873	poll_fileno()	1285	poll_fileno()
874	PROTOTYPE:	1286	PROTOTYPE:
875	CODE:	1287	CODE:
876	RETVAL = respipe [0];	1288	RETVAL = s_epipe_fd (&respipe);
877	OUTPUT:	1289	OUTPUT:
878	RETVAL	1290	RETVAL
879		1291
880	int	1292	int
881	poll_cb(...)	1293	poll_cb(...)
…		…
887		1299
888	void	1300	void
889	poll_wait()	1301	poll_wait()
890	PROTOTYPE:	1302	PROTOTYPE:
891	CODE:	1303	CODE:
892	if (nreqs)
893	poll_wait ();	1304	poll_wait ();
894		1305
895	int	1306	int
896	nreqs()	1307	nreqs()
897	PROTOTYPE:	1308	PROTOTYPE:
898	CODE:	1309	CODE:
899	RETVAL = nreqs;	1310	RETVAL = eio_nreqs ();
900	OUTPUT:	1311	OUTPUT:
901	RETVAL	1312	RETVAL
902		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
		1426	PROTOTYPES: DISABLE
		1427
		1428	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1429
		1430	void
		1431	cancel (aio_req_ornot req)
		1432	CODE:
		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	}
		1450
		1451	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1452
		1453	void
		1454	add (aio_req grp, ...)
		1455	PPCODE:
		1456	{
		1457	int i;
		1458
		1459	if (grp->int1 == 2)
		1460	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1461
		1462	for (i = 1; i < items; ++i )
		1463	{
		1464	aio_req req;
		1465
		1466	if (GIMME_V != G_VOID)
		1467	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1468
		1469	req = SvAIO_REQ (ST (i));
		1470
		1471	if (req)
		1472	eio_grp_add (grp, req);
		1473	}
		1474	}
		1475
		1476	void
		1477	cancel_subs (aio_req_ornot req)
		1478	CODE:
		1479	req_cancel_subs (req);
		1480
		1481	void
		1482	result (aio_req grp, ...)
		1483	CODE:
		1484	{
		1485	int i;
		1486	AV *av;
		1487
		1488	grp->errorno = errno;
		1489
		1490	av = newAV ();
		1491	av_extend (av, items - 1);
		1492
		1493	for (i = 1; i < items; ++i )
		1494	av_push (av, newSVsv (ST (i)));
		1495
		1496	SvREFCNT_dec (grp->sv1);
		1497	grp->sv1 = (SV *)av;
		1498	}
		1499
		1500	void
		1501	errno (aio_req grp, int errorno = errno)
		1502	CODE:
		1503	grp->errorno = errorno;
		1504
		1505	void
		1506	limit (aio_req grp, int limit)
		1507	CODE:
		1508	eio_grp_limit (grp, limit);
		1509
		1510	void
		1511	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1512	CODE:
		1513	{
		1514	SvREFCNT_dec (grp->sv2);
		1515	grp->sv2 = newSVsv (callback);
		1516	grp->feed = aio_grp_feed;
		1517
		1518	if (grp->int2 <= 0)
		1519	grp->int2 = 2;
		1520
		1521	eio_grp_limit (grp, grp->int2);
		1522	}
		1523

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