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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.149 by root, Tue Jun 30 07:33:58 2009 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
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/types.h>	12	#include <sys/types.h>
15	#include <sys/stat.h>	13	#include <sys/stat.h>
16	#include <limits.h>	14	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	15	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	16	#include <sched.h>
21		17
22	#if HAVE_SENDFILE	18	/* perl namespace pollution */
23	# if __linux	19	#undef VERSION
24	# include <sys/sendfile.h>	20
25	# elif __freebsd	21	#ifdef _WIN32
26	# include <sys/socket.h>	22
27	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
28	# elif __hpux	24	# undef malloc
29	# include <sys/socket.h>	25	# undef free
30	# elif __solaris /* not yet */	26
31	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
32	# else	59	#else
33	# error sendfile support requested but not available	60
34	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
35	#endif	68	#endif
36		69
37	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
38	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
39	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define VAL64 IV
		81	# define SvVAL64 SvIV
		82	# define newSVval64 newSViv
		83	#else
		84	# define VAL64 NV
		85	# define SvVAL64 SvNV
		86	# define newSVval64 newSVnv
40	#endif	87	#endif
41		88
42	#if __ia64	89	/*****************************************************************************/
43	# define STACKSIZE 65536	90
		91	#if __GNUC__ >= 3
		92	# define expect(expr,value) __builtin_expect ((expr),(value))
44	#else	93	#else
45	# define STACKSIZE 8192	94	# define expect(expr,value) (expr)
46	#endif	95	#endif
47		96
48	enum {	97	#define expect_false(expr) expect ((expr) != 0, 0)
49	REQ_QUIT,	98	#define expect_true(expr) expect ((expr) != 0, 1)
50	REQ_OPEN, REQ_CLOSE,	99
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	100	/*****************************************************************************/
52	REQ_SENDFILE,	101
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	102	static HV *stash;
54	REQ_FSYNC, REQ_FDATASYNC,	103	typedef SV SV8; /* byte-sv, used for argument-checking */
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	104	typedef int aio_rfd; /* read file desriptor */
56	REQ_READDIR,	105	typedef int aio_wfd; /* write file descriptor */
57	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,
59	};
60		106
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	107	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	108	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		109
64	typedef struct aio_cb	110	#define EIO_REQ_MEMBERS \
65	{
66	struct aio_cb *grp, *grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;
69
70	SV *self; /* the perl counterpart of this request, if any */
71
72	SV *data, *callback;	111	SV *callback; \
73	SV *fh, *fh2;	112	SV *sv1, *sv2; \
74	void *dataptr, *data2ptr;
75	Stat_t *statdata;
76	off_t offset;
77	size_t length;
78	ssize_t result;
79
80	int type;
81	int fd, fd2;
82	int errorno;
83	STRLEN dataoffset;	113	STRLEN stroffset; \
84	mode_t mode; /* open */	114	SV *self;
85	unsigned char cancelled;
86	} aio_cb;
87		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
		150	enum {
		151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		152	};
		153
		154	#include "libeio/eio.c"
		155
88	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
89	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
90	typedef aio_cb *aio_group;
91		158
92	static int started, wanted;	159	static SV *on_next_submit;
93	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
94	static int max_outstanding = 1<<30;	161	static int max_outstanding;
95	static int respipe [2];
96		162
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static int respipe_osf [2], respipe [2] = { -1, -1 };
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		164
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
102	static volatile aio_req ress, rese; /* queue start, queue end */	166	static void req_cancel (aio_req req);
		167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	char buf [4];
		178	while (respipe_read (respipe [0], buf, 4) == 4)
		179	;
		180	}
103		181
104	/* must be called at most once */	182	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	183	static SV *req_sv (aio_req req, const char *klass)
106	{	184	{
		185	if (!req->self)
		186	{
107	req->self = (SV *)newHV ();	187	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	188	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		189	}
109		190
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	191	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	192	}
112		193
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	194	static aio_req SvAIO_REQ (SV *sv)
114	{	195	{
		196	MAGIC *mg;
		197
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	198	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
116	croak ("object of class %s expected", klass);	199	croak ("object of class " AIO_REQ_KLASS " expected");
117		200
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	201	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		202
120	return mg ? (aio_req)mg->mg_ptr : 0;	203	return mg ? (aio_req)mg->mg_ptr : 0;
121	}	204	}
122		205
		206	static void aio_grp_feed (aio_req grp)
		207	{
		208	if (grp->sv2 && SvOK (grp->sv2))
		209	{
		210	dSP;
		211
		212	ENTER;
		213	SAVETMPS;
		214	PUSHMARK (SP);
		215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		216	PUTBACK;
		217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		218	SPAGAIN;
		219	FREETMPS;
		220	LEAVE;
		221	}
		222	}
		223
		224	static void req_submit (eio_req *req)
		225	{
		226	eio_submit (req);
		227
		228	if (expect_false (on_next_submit))
		229	{
		230	dSP;
		231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
		238	}
		239	}
		240
		241	static int req_invoke (eio_req *req)
		242	{
		243	dSP;
		244
		245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
		247
		248	if (!EIO_CANCELLED (req) && req->callback)
		249	{
		250	ENTER;
		251	SAVETMPS;
		252	PUSHMARK (SP);
		253	EXTEND (SP, 1);
		254
		255	switch (req->type)
		256	{
		257	case EIO_READDIR:
		258	{
		259	SV *rv = &PL_sv_undef;
		260
		261	if (req->result >= 0)
		262	{
		263	int i;
		264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		266	AV *av = newAV ();
		267
		268	av_extend (av, req->result - 1);
		269
		270	for (i = 0; i < req->result; ++i)
		271	{
		272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
		296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
		304	names += SvCUR (name) + 1;
		305	}
		306	}
		307
		308	rv = sv_2mortal (newRV_noinc ((SV *)av));
		309	}
		310
		311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		315	}
		316	break;
		317
		318	case EIO_OPEN:
		319	{
		320	/* convert fd to fh */
		321	SV *fh = &PL_sv_undef;
		322
		323	if (req->result >= 0)
		324	{
		325	GV *gv = (GV *)sv_newmortal ();
		326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
		332
		333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
		345	PUSHs (fh);
		346	}
		347	break;
		348
		349	case EIO_GROUP:
		350	req->int1 = 2; /* mark group as finished */
		351
		352	if (req->sv1)
		353	{
		354	int i;
		355	AV *av = (AV *)req->sv1;
		356
		357	EXTEND (SP, AvFILL (av) + 1);
		358	for (i = 0; i <= AvFILL (av); ++i)
		359	PUSHs (*av_fetch (av, i, 0));
		360	}
		361	break;
		362
		363	case EIO_NOP:
		364	case EIO_BUSY:
		365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
		382	{
		383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		384	*SvEND (req->sv2) = 0;
		385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
		395
		396	default:
		397	PUSHs (sv_2mortal (newSViv (req->result)));
		398	break;
		399	}
		400
		401	errno = req->errorno;
		402
		403	PUTBACK;
		404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		405	SPAGAIN;
		406
		407	FREETMPS;
		408	LEAVE;
		409
		410	PUTBACK;
		411	}
		412
		413	return !!SvTRUE (ERRSV);
		414	}
		415
123	static void req_free (aio_req req)	416	static void req_destroy (aio_req req)
124	{	417	{
125	if (req->self)	418	if (req->self)
126	{	419	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	420	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	421	SvREFCNT_dec (req->self);
129	}	422	}
130		423
131	if (req->data)
132	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	424	SvREFCNT_dec (req->sv1);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	425	SvREFCNT_dec (req->sv2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
145
146	if (req->type == REQ_READDIR && req->result >= 0)
147	free (req->data2ptr);
148		427
149	Safefree (req);	428	Safefree (req);
150	}	429	}
151		430
		431	static void req_cancel_subs (aio_req grp)
		432	{
		433	aio_req sub;
		434
		435	if (grp->type != EIO_GROUP)
		436	return;
		437
		438	SvREFCNT_dec (grp->sv2);
		439	grp->sv2 = 0;
		440
		441	eio_grp_cancel (grp);
		442	}
		443
		444	#ifdef USE_SOCKETS_AS_HANDLES
		445	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		446	#else
		447	# define TO_SOCKET(x) (x)
		448	#endif
		449
152	static void	450	static void
153	poll_wait ()	451	create_respipe (void)
154	{	452	{
155	if (nreqs && !ress)	453	int old_readfd = respipe [0];
		454
		455	if (respipe [1] >= 0)
		456	respipe_close (TO_SOCKET (respipe [1]));
		457
		458	#ifdef _WIN32
		459	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		460	#else
		461	if (pipe (respipe))
		462	#endif
		463	croak ("unable to initialize result pipe");
		464
		465	if (old_readfd >= 0)
156	{	466	{
157	fd_set rfd;	467	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
158	FD_ZERO(&rfd);	468	croak ("unable to initialize result pipe(2)");
159	FD_SET(respipe [0], &rfd);
160		469
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	470	respipe_close (respipe [0]);
		471	respipe [0] = old_readfd;
162	}	472	}
163	}
164		473
165	static int	474	#ifdef _WIN32
166	poll_cb ()	475	int arg = 1;
167	{	476	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
168	dSP;	477	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
169	int count = 0;	478	#else
170	int do_croak = 0;	479	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
171	aio_req req;	480	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		481	#endif
		482	croak ("unable to initialize result pipe(3)");
172		483
		484	respipe_osf [0] = TO_SOCKET (respipe [0]);
		485	respipe_osf [1] = TO_SOCKET (respipe [1]);
		486	}
		487
		488	static void poll_wait (void)
		489	{
		490	fd_set rfd;
		491
		492	while (eio_nreqs ())
		493	{
		494	int size;
		495
		496	X_LOCK (reslock);
		497	size = res_queue.size;
		498	X_UNLOCK (reslock);
		499
		500	if (size)
		501	return;
		502
		503	etp_maybe_start_thread ();
		504
		505	FD_ZERO (&rfd);
		506	FD_SET (respipe [0], &rfd);
		507
		508	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		509	}
		510	}
		511
		512	static int poll_cb (void)
		513	{
173	for (;;)	514	for (;;)
174	{	515	{
175	pthread_mutex_lock (&reslock);	516	int res = eio_poll ();
176	req = ress;
177		517
178	if (req)	518	if (res > 0)
179	{
180	ress = req->next;
181
182	if (!ress)
183	{
184	/* read any signals sent by the worker threads */
185	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)
187	;
188
189	rese = 0;
190	}
191	}
192
193	pthread_mutex_unlock (&reslock);
194
195	if (!req)
196	break;
197
198	nreqs--;
199
200	if (req->type == REQ_QUIT)
201	started--;
202	else
203	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209
210	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);
212
213	if (req->statdata)
214	{
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
216	PL_laststatval = req->result;
217	PL_statcache = *(req->statdata);
218	}
219
220	ENTER;
221	PUSHMARK (SP);
222
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}
246	else
247	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)
251	{
252	/* convert fd to fh */
253	SV *fh;
254
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}
264	}
265
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID | G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{
274	req_free (req);
275	croak (0);	519	croak (0);
276	}
277	}
278		520
279	LEAVE;	521	if (!max_outstanding || max_outstanding > eio_nreqs ())
		522	return res;
280		523
281	errno = errorno;	524	poll_wait ();
282	count++;
283	}
284
285	req_free (req);
286	}	525	}
287
288	return count;
289	}	526	}
290		527
291	static void *aio_proc(void *arg);	528	static void atfork_child (void)
292
293	static void
294	start_thread (void)
295	{	529	{
296	sigset_t fullsigset, oldsigset;	530	create_respipe ();
297	pthread_t tid;
298	pthread_attr_t attr;
299
300	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303
304	sigfillset (&fullsigset);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
308	started++;
309
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);
311	}	531	}
312		532
313	static void	533	static SV *
314	req_send (aio_req req)	534	get_cb (SV *cb_sv)
315	{	535	{
316	while (started < wanted && nreqs >= started)	536	HV *st;
317	start_thread ();	537	GV *gvp;
		538	CV *cv;
318		539
319	nreqs++;	540	if (!SvOK (cb_sv))
320
321	pthread_mutex_lock (&reqlock);
322
323	req->next = 0;
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);
335
336	if (nreqs > max_outstanding)
337	for (;;)
338	{
339	poll_cb ();
340
341	if (nreqs <= max_outstanding)
342	break;
343
344	poll_wait ();
345	}
346	}
347
348	static void
349	end_thread (void)
350	{
351	aio_req req;
352	Newz (0, req, 1, aio_cb);
353	req->type = REQ_QUIT;
354
355	req_send (req);
356	}
357
358	static void min_parallel (int nthreads)
359	{
360	if (wanted < nthreads)
361	wanted = nthreads;
362	}
363
364	static void max_parallel (int nthreads)
365	{
366	int cur = started;
367
368	if (wanted > nthreads)
369	wanted = nthreads;
370
371	while (cur > wanted)
372	{
373	end_thread ();
374	cur--;
375	}
376
377	while (started > wanted)
378	{
379	poll_wait ();
380	poll_cb ();
381	}
382	}
383
384	static void create_pipe ()
385	{
386	if (pipe (respipe))
387	croak ("unable to initialize result pipe");
388
389	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
390	croak ("cannot set result pipe to nonblocking mode");
391
392	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
393	croak ("cannot set result pipe to nonblocking mode");
394	}
395
396	/*****************************************************************************/
397	/* work around various missing functions */
398
399	#if !HAVE_PREADWRITE
400	# define pread aio_pread
401	# define pwrite aio_pwrite
402
403	/*
404	* make our pread/pwrite safe against themselves, but not against
405	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.
407	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409
410	static ssize_t
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{
413	ssize_t res;
414	off_t ooffset;
415
416	pthread_mutex_lock (&preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);
422
423	return res;
424	}
425
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)
428	{
429	ssize_t res;
430	off_t ooffset;
431
432	pthread_mutex_lock (&preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);
438
439	return res;
440	}
441	#endif
442
443	#if !HAVE_FDATASYNC
444	# define fdatasync fsync
445	#endif
446
447	#if !HAVE_READAHEAD
448	# define readahead aio_readahead
449
450	static ssize_t
451	readahead (int fd, off_t offset, size_t count)
452	{
453	char readahead_buf[4096];
454
455	while (count > 0)
456	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
458
459	pread (fd, readahead_buf, len, offset);
460	offset += len;
461	count -= len;
462	}
463
464	errno = 0;
465	}
466	#endif
467
468	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r
470
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472
473	static int
474	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475	{
476	struct dirent *e;
477	int errorno;
478
479	pthread_mutex_lock (&readdirlock);
480
481	e = readdir (dirp);
482	errorno = errno;
483
484	if (e)
485	{
486	*res = ent;
487	strcpy (ent->d_name, e->d_name);
488	}
489	else
490	*res = 0;
491
492	pthread_mutex_unlock (&readdirlock);
493
494	errno = errorno;
495	return e ? 0 : -1;
496	}
497	#endif
498
499	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
502	{
503	ssize_t res;
504
505	if (!count)
506	return 0;	541	return 0;
507		542
508	#if HAVE_SENDFILE	543	cv = sv_2cv (cb_sv, &st, &gvp, 0);
509	# if __linux
510	res = sendfile (ofd, ifd, &offset, count);
511		544
512	# elif __freebsd	545	if (!cv)
513	/*	546	croak ("IO::AIO callback must be undef or a CODE reference");
514	* Of course, the freebsd sendfile is a dire hack with no thoughts
515	* wasted on making it similar to other I/O functions.
516	*/
517	{
518	off_t sbytes;
519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520		547
521	if (res < 0 && sbytes)	548	return (SV *)cv;
522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
523	res = sbytes;
524	}
525
526	# elif __hpux
527	res = sendfile (ofd, ifd, offset, count, 0, 0);
528
529	# elif __solaris
530	{
531	struct sendfilevec vec;
532	size_t sbytes;
533
534	vec.sfv_fd = ifd;
535	vec.sfv_flag = 0;
536	vec.sfv_off = offset;
537	vec.sfv_len = count;
538
539	res = sendfilev (ofd, &vec, 1, &sbytes);
540
541	if (res < 0 && sbytes)
542	res = sbytes;
543	}
544
545	# endif
546	#else
547	res = -1;
548	errno = ENOSYS;
549	#endif
550
551	if (res < 0
552	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
553	#if __solaris
554	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
555	#endif
556	)
557	)
558	{
559	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];
561	res = 0;
562
563	while (count)
564	{
565	ssize_t cnt;
566
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
568
569	if (cnt <= 0)
570	{
571	if (cnt && !res) res = -1;
572	break;
573	}
574
575	cnt = write (ofd, buf, cnt);
576
577	if (cnt <= 0)
578	{
579	if (cnt && !res) res = -1;
580	break;
581	}
582
583	offset += cnt;
584	res += cnt;
585	count -= cnt;
586	}
587	}
588
589	return res;
590	}
591
592	/* read a full directory */
593	static int
594	scandir_ (const char *path, void **namesp)
595	{
596	DIR *dirp = opendir (path);
597	union
598	{
599	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;
602	struct dirent *entp;
603	char *name, *names;
604	int memlen = 4096;
605	int memofs = 0;
606	int res = 0;
607	int errorno;
608
609	if (!dirp)
610	return -1;
611
612	names = malloc (memlen);
613
614	for (;;)
615	{
616	errno = 0, readdir_r (dirp, &u.d, &entp);
617
618	if (!entp)
619	break;
620
621	name = entp->d_name;
622
623	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624	{
625	int len = strlen (name) + 1;
626
627	res++;
628
629	while (memofs + len > memlen)
630	{
631	memlen *= 2;
632	names = realloc (names, memlen);
633	if (!names)
634	break;
635	}
636
637	memcpy (names + memofs, name, len);
638	memofs += len;
639	}
640	}
641
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;
650	}
651
652	*namesp = (void *)names;
653	return res;
654	}
655
656	/*****************************************************************************/
657
658	static void *
659	aio_proc (void *thr_arg)
660	{
661	aio_req req;
662	int type;
663
664	do
665	{
666	pthread_mutex_lock (&reqlock);
667
668	for (;;)
669	{
670	req = reqs;
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677
678	if (req)
679	break;
680
681	pthread_cond_wait (&reqwait, &reqlock);
682	}
683
684	pthread_mutex_unlock (&reqlock);
685
686	errno = 0; /* strictly unnecessary */
687
688	if (!req->cancelled)
689	switch (req->type)
690	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
695	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
696
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
700
701	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
702	case REQ_CLOSE: req->result = close (req->fd); break;
703	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
704	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
705	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
708
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
712
713	case REQ_QUIT:
714	break;
715
716	default:
717	req->result = ENOSYS;
718	break;
719	}
720
721	req->errorno = errno;
722
723	pthread_mutex_lock (&reslock);
724
725	req->next = 0;
726
727	if (rese)
728	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);
738	}
739
740	pthread_mutex_unlock (&reslock);
741	}
742	while (type != REQ_QUIT);
743
744	return 0;
745	}
746
747	/*****************************************************************************/
748
749	static void atfork_prepare (void)
750	{
751	pthread_mutex_lock (&reqlock);
752	pthread_mutex_lock (&reslock);
753	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);
755	#endif
756	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);
758	#endif
759	}
760
761	static void atfork_parent (void)
762	{
763	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);
765	#endif
766	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);
768	#endif
769	pthread_mutex_unlock (&reslock);
770	pthread_mutex_unlock (&reqlock);
771	}
772
773	static void atfork_child (void)
774	{
775	aio_req prv;
776
777	started = 0;
778
779	while (reqs)
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);
784	}
785
786	reqs = reqe = 0;
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);
793	}
794
795	ress = rese = 0;
796
797	close (respipe [0]);
798	close (respipe [1]);
799	create_pipe ();
800
801	atfork_parent ();
802	}	549	}
803		550
804	#define dREQ \	551	#define dREQ \
		552	SV *cb_cv; \
805	aio_req req; \	553	aio_req req; \
		554	int req_pri = next_pri; \
		555	next_pri = EIO_PRI_DEFAULT; \
806	\	556	\
807	if (SvOK (callback) && !SvROK (callback)) \	557	cb_cv = get_cb (callback); \
808	croak ("callback must be undef or of reference type"); \
809	\	558	\
810	Newz (0, req, 1, aio_cb); \	559	Newz (0, req, 1, eio_req); \
811	if (!req) \	560	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	561	croak ("out of memory during eio_req allocation"); \
813	\	562	\
814	req->callback = newSVsv (callback)	563	req->callback = SvREFCNT_inc (cb_cv); \
		564	req->pri = req_pri
815		565
816	#define REQ_SEND \	566	#define REQ_SEND \
		567	PUTBACK; \
817	req_send (req); \	568	req_submit (req); \
		569	SPAGAIN; \
818	\	570	\
819	if (GIMME_V != G_VOID) \	571	if (GIMME_V != G_VOID) \
820	XPUSHs (req_sv (req, AIO_REQ_KLASS));	572	XPUSHs (req_sv (req, AIO_REQ_KLASS));
821		573
		574	static int
		575	extract_fd (SV *fh, int wr)
		576	{
		577	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		578
		579	if (fd < 0)
		580	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		581
		582	return fd;
		583	}
		584
822	MODULE = IO::AIO PACKAGE = IO::AIO	585	MODULE = IO::AIO PACKAGE = IO::AIO
823		586
824	PROTOTYPES: ENABLE	587	PROTOTYPES: ENABLE
825		588
826	BOOT:	589	BOOT:
827	{	590	{
		591	static const struct {
		592	const char *name;
		593	IV iv;
		594	} *civ, const_iv[] = {
		595	# define const_iv(name, value) { # name, (IV) value },
		596	# define const_eio(name) { # name, (IV) EIO_ ## name },
		597	const_iv (EXDEV , EXDEV)
		598	const_iv (ENOSYS , ENOSYS)
		599	const_iv (O_RDONLY, O_RDONLY)
		600	const_iv (O_WRONLY, O_WRONLY)
		601	const_iv (O_CREAT , O_CREAT)
		602	const_iv (O_TRUNC , O_TRUNC)
		603	#ifndef _WIN32
		604	const_iv (S_IFIFO , S_IFIFO)
		605	#endif
		606	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		607	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		608	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		609	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		610	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		611	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		612
		613	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		614	const_eio (SYNC_FILE_RANGE_WRITE)
		615	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		616
		617	const_eio (READDIR_DENTS)
		618	const_eio (READDIR_DIRS_FIRST)
		619	const_eio (READDIR_STAT_ORDER)
		620	const_eio (READDIR_FOUND_UNKNOWN)
		621
		622	const_eio (DT_UNKNOWN)
		623	const_eio (DT_FIFO)
		624	const_eio (DT_CHR)
		625	const_eio (DT_DIR)
		626	const_eio (DT_BLK)
		627	const_eio (DT_REG)
		628	const_eio (DT_LNK)
		629	const_eio (DT_SOCK)
		630	const_eio (DT_WHT)
		631	};
		632
828	HV *stash = gv_stashpv ("IO::AIO", 1);	633	stash = gv_stashpv ("IO::AIO", 1);
829	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
830	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
831	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
832		634
		635	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		636	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		637
833	create_pipe ();	638	create_respipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}
836		639
		640	if (eio_init (want_poll, done_poll) < 0)
		641	croak ("IO::AIO: unable to initialise eio library");
		642
		643	/* atfork child called in fifo order, so before eio's handler */
		644	X_THREAD_ATFORK (0, 0, atfork_child);
		645	}
		646
837	void	647	void
838	min_parallel (nthreads)	648	max_poll_reqs (int nreqs)
839	int nthreads
840	PROTOTYPE: $	649	PROTOTYPE: $
		650	CODE:
		651	eio_set_max_poll_reqs (nreqs);
841		652
842	void	653	void
843	max_parallel (nthreads)	654	max_poll_time (double nseconds)
844	int nthreads
845	PROTOTYPE: $	655	PROTOTYPE: $
846
847	int
848	max_outstanding (nreqs)
849	int nreqs
850	PROTOTYPE: $
851	CODE:	656	CODE:
852	RETVAL = max_outstanding;	657	eio_set_max_poll_time (nseconds);
		658
		659	void
		660	min_parallel (int nthreads)
		661	PROTOTYPE: $
		662	CODE:
		663	eio_set_min_parallel (nthreads);
		664
		665	void
		666	max_parallel (int nthreads)
		667	PROTOTYPE: $
		668	CODE:
		669	eio_set_max_parallel (nthreads);
		670
		671	void
		672	max_idle (int nthreads)
		673	PROTOTYPE: $
		674	CODE:
		675	eio_set_max_idle (nthreads);
		676
		677	void
		678	max_outstanding (int maxreqs)
		679	PROTOTYPE: $
		680	CODE:
853	max_outstanding = nreqs;	681	max_outstanding = maxreqs;
854		682
855	void	683	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	684	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
857	SV * pathname
858	int flags
859	int mode
860	SV * callback
861	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
862	PPCODE:	686	PPCODE:
863	{	687	{
864	dREQ;	688	dREQ;
865		689
866	req->type = REQ_OPEN;	690	req->type = EIO_OPEN;
867	req->data = newSVsv (pathname);	691	req->sv1 = newSVsv (pathname);
868	req->dataptr = SvPVbyte_nolen (req->data);	692	req->ptr1 = SvPVbyte_nolen (req->sv1);
869	req->fd = flags;	693	req->int1 = flags;
870	req->mode = mode;	694	req->int2 = mode;
871		695
872	REQ_SEND;	696	REQ_SEND;
873	}	697	}
874		698
875	void	699	void
876	aio_close (fh,callback=&PL_sv_undef)	700	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
877	SV * fh
878	SV * callback
879	PROTOTYPE: $;$	701	PROTOTYPE: $;$
880	ALIAS:	702	ALIAS:
881	aio_close = REQ_CLOSE
882	aio_fsync = REQ_FSYNC	703	aio_fsync = EIO_FSYNC
883	aio_fdatasync = REQ_FDATASYNC	704	aio_fdatasync = EIO_FDATASYNC
884	PPCODE:	705	PPCODE:
885	{	706	{
		707	int fd = extract_fd (fh, 0);
886	dREQ;	708	dREQ;
887		709
888	req->type = ix;	710	req->type = ix;
889	req->fh = newSVsv (fh);	711	req->sv1 = newSVsv (fh);
890	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	712	req->int1 = fd;
891		713
892	REQ_SEND (req);	714	REQ_SEND (req);
893	}	715	}
894		716
895	void	717	void
		718	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$$$;$
		720	PPCODE:
		721	{
		722	int fd = extract_fd (fh, 0);
		723	dREQ;
		724
		725	req->type = EIO_SYNC_FILE_RANGE;
		726	req->sv1 = newSVsv (fh);
		727	req->int1 = fd;
		728	req->offs = offset;
		729	req->size = nbytes;
		730	req->int2 = flags;
		731
		732	REQ_SEND (req);
		733	}
		734
		735	void
		736	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		737	PROTOTYPE: $;$
		738	PPCODE:
		739	{
		740	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		741	int fd = extract_fd (fh, 0);
		742	dREQ;
		743
		744	if (close_pipe < 0)
		745	{
		746	int pipefd [2];
		747
		748	if (pipe (pipefd) < 0
		749	|| close (pipefd [1]) < 0
		750	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		751	abort (); /*D*/
		752
		753	close_pipe = pipefd [0];
		754	}
		755
		756	req->type = EIO_DUP2;
		757	req->int1 = close_pipe;
		758	req->sv2 = newSVsv (fh);
		759	req->int2 = fd;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
896	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	765	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
897	SV * fh
898	UV offset
899	UV length
900	SV * data
901	UV dataoffset
902	SV * callback
903	ALIAS:	766	ALIAS:
904	aio_read = REQ_READ	767	aio_read = EIO_READ
905	aio_write = REQ_WRITE	768	aio_write = EIO_WRITE
906	PROTOTYPE: $$$$$;$	769	PROTOTYPE: $$$$$;$
907	PPCODE:	770	PPCODE:
908	{	771	{
909	aio_req req;
910	STRLEN svlen;	772	STRLEN svlen;
		773	int fd = extract_fd (fh, ix == EIO_WRITE);
911	char *svptr = SvPVbyte (data, svlen);	774	char *svptr = SvPVbyte (data, svlen);
912		775	UV len = SvUV (length);
913	SvUPGRADE (data, SVt_PV);
914	SvPOK_on (data);
915		776
916	if (dataoffset < 0)	777	if (dataoffset < 0)
917	dataoffset += svlen;	778	dataoffset += svlen;
918		779
919	if (dataoffset < 0 || dataoffset > svlen)	780	if (dataoffset < 0 || dataoffset > svlen)
920	croak ("data offset outside of string");	781	croak ("dataoffset outside of data scalar");
921		782
922	if (ix == REQ_WRITE)	783	if (ix == EIO_WRITE)
923	{	784	{
924	/* write: check length and adjust. */	785	/* write: check length and adjust. */
925	if (length < 0 || length + dataoffset > svlen)	786	if (!SvOK (length) || len + dataoffset > svlen)
926	length = svlen - dataoffset;	787	len = svlen - dataoffset;
927	}	788	}
928	else	789	else
929	{	790	{
930	/* read: grow scalar as necessary */	791	/* read: check type and grow scalar as necessary */
		792	SvUPGRADE (data, SVt_PV);
931	svptr = SvGROW (data, length + dataoffset);	793	svptr = SvGROW (data, len + dataoffset + 1);
932	}	794	}
933
934	if (length < 0)
935	croak ("length must not be negative");
936		795
937	{	796	{
938	dREQ;	797	dREQ;
939		798
940	req->type = ix;	799	req->type = ix;
941	req->fh = newSVsv (fh);	800	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	801	req->int1 = fd;
943	: IoOFP (sv_2io (fh)));	802	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
944	req->offset = offset;	803	req->size = len;
945	req->length = length;
946	req->data = SvREFCNT_inc (data);	804	req->sv2 = SvREFCNT_inc (data);
947	req->dataptr = (char *)svptr + dataoffset;	805	req->ptr2 = (char *)svptr + dataoffset;
		806	req->stroffset = dataoffset;
948		807
949	if (!SvREADONLY (data))	808	if (!SvREADONLY (data))
950	{	809	{
951	SvREADONLY_on (data);	810	SvREADONLY_on (data);
952	req->data2ptr = (void *)data;	811	req->flags |= FLAG_SV2_RO_OFF;
953	}	812	}
954		813
955	REQ_SEND;	814	REQ_SEND;
956	}	815	}
957	}	816	}
958		817
959	void	818	void
		819	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		820	PROTOTYPE: $$;$
		821	PPCODE:
		822	{
		823	SV *data;
		824	dREQ;
		825
		826	req->type = EIO_READLINK;
		827	req->sv1 = newSVsv (path);
		828	req->ptr1 = SvPVbyte_nolen (req->sv1);
		829
		830	REQ_SEND;
		831	}
		832
		833	void
960	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	834	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
961	SV * out_fh
962	SV * in_fh
963	UV in_offset
964	UV length
965	SV * callback
966	PROTOTYPE: $$$$;$	835	PROTOTYPE: $$$$;$
967	PPCODE:	836	PPCODE:
968	{	837	{
		838	int ifd = extract_fd (in_fh , 0);
		839	int ofd = extract_fd (out_fh, 0);
969	dREQ;	840	dREQ;
970		841
971	req->type = REQ_SENDFILE;	842	req->type = EIO_SENDFILE;
972	req->fh = newSVsv (out_fh);	843	req->sv1 = newSVsv (out_fh);
973	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	844	req->int1 = ofd;
974	req->fh2 = newSVsv (in_fh);	845	req->sv2 = newSVsv (in_fh);
975	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	846	req->int2 = ifd;
976	req->offset = in_offset;	847	req->offs = in_offset;
977	req->length = length;	848	req->size = length;
978		849
979	REQ_SEND;	850	REQ_SEND;
980	}	851	}
981		852
982	void	853	void
983	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	854	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
984	SV * fh
985	UV offset
986	IV length
987	SV * callback
988	PROTOTYPE: $$$;$	855	PROTOTYPE: $$$;$
989	PPCODE:	856	PPCODE:
990	{	857	{
		858	int fd = extract_fd (fh, 0);
991	dREQ;	859	dREQ;
992		860
993	req->type = REQ_READAHEAD;	861	req->type = EIO_READAHEAD;
994	req->fh = newSVsv (fh);	862	req->sv1 = newSVsv (fh);
995	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	863	req->int1 = fd;
996	req->offset = offset;	864	req->offs = offset;
997	req->length = length;	865	req->size = length;
998		866
999	REQ_SEND;	867	REQ_SEND;
1000	}	868	}
1001		869
1002	void	870	void
1003	aio_stat (fh_or_path,callback=&PL_sv_undef)	871	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1004	SV * fh_or_path
1005	SV * callback
1006	ALIAS:	872	ALIAS:
1007	aio_stat = REQ_STAT	873	aio_stat = EIO_STAT
1008	aio_lstat = REQ_LSTAT	874	aio_lstat = EIO_LSTAT
1009	PPCODE:	875	PPCODE:
1010	{	876	{
1011	dREQ;	877	dREQ;
1012		878
1013	New (0, req->statdata, 1, Stat_t);	879	req->sv1 = newSVsv (fh_or_path);
1014	if (!req->statdata)
1015	{
1016	req_free (req);
1017	croak ("out of memory during aio_req->statdata allocation");
1018	}
1019		880
1020	if (SvPOK (fh_or_path))	881	if (SvPOK (req->sv1))
1021	{	882	{
1022	req->type = ix;	883	req->type = ix;
1023	req->data = newSVsv (fh_or_path);
1024	req->dataptr = SvPVbyte_nolen (req->data);	884	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	}	885	}
1026	else	886	else
1027	{	887	{
1028	req->type = REQ_FSTAT;	888	req->type = EIO_FSTAT;
1029	req->fh = newSVsv (fh_or_path);
1030	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1031	}	890	}
1032		891
1033	REQ_SEND;	892	REQ_SEND;
1034	}	893	}
1035		894
1036	void	895	void
		896	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		897	PPCODE:
		898	{
		899	dREQ;
		900
		901	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		902	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		903	req->sv1 = newSVsv (fh_or_path);
		904
		905	if (SvPOK (req->sv1))
		906	{
		907	req->type = EIO_UTIME;
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	}
		910	else
		911	{
		912	req->type = EIO_FUTIME;
		913	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		914	}
		915
		916	REQ_SEND;
		917	}
		918
		919	void
		920	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->sv1 = newSVsv (fh_or_path);
		926	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		927
		928	if (SvPOK (req->sv1))
		929	{
		930	req->type = EIO_TRUNCATE;
		931	req->ptr1 = SvPVbyte_nolen (req->sv1);
		932	}
		933	else
		934	{
		935	req->type = EIO_FTRUNCATE;
		936	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		937	}
		938
		939	REQ_SEND;
		940	}
		941
		942	void
		943	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		944	ALIAS:
		945	aio_chmod = EIO_CHMOD
		946	aio_mkdir = EIO_MKDIR
		947	PPCODE:
		948	{
		949	dREQ;
		950
		951	req->int2 = mode;
		952	req->sv1 = newSVsv (fh_or_path);
		953
		954	if (SvPOK (req->sv1))
		955	{
		956	req->type = ix;
		957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958	}
		959	else
		960	{
		961	req->type = EIO_FCHMOD;
		962	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		963	}
		964
		965	REQ_SEND;
		966	}
		967
		968	void
		969	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		970	PPCODE:
		971	{
		972	dREQ;
		973
		974	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		975	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		976	req->sv1 = newSVsv (fh_or_path);
		977
		978	if (SvPOK (req->sv1))
		979	{
		980	req->type = EIO_CHOWN;
		981	req->ptr1 = SvPVbyte_nolen (req->sv1);
		982	}
		983	else
		984	{
		985	req->type = EIO_FCHOWN;
		986	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		987	}
		988
		989	REQ_SEND;
		990	}
		991
		992	void
		993	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = EIO_READDIR;
		999	req->sv1 = newSVsv (pathname);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1002
		1003	if (flags & EIO_READDIR_DENTS)
		1004	req->int1 |= EIO_READDIR_CUSTOM2;
		1005
		1006	REQ_SEND;
		1007	}
		1008
		1009	void
1037	aio_unlink (pathname,callback=&PL_sv_undef)	1010	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1038	SV * pathname
1039	SV * callback
1040	ALIAS:	1011	ALIAS:
1041	aio_unlink = REQ_UNLINK	1012	aio_unlink = EIO_UNLINK
1042	aio_rmdir = REQ_RMDIR	1013	aio_rmdir = EIO_RMDIR
1043	aio_readdir = REQ_READDIR	1014	aio_readdir = EIO_READDIR
1044	PPCODE:	1015	PPCODE:
1045	{	1016	{
1046	dREQ;	1017	dREQ;
1047		1018
1048	req->type = ix;	1019	req->type = ix;
1049	req->data = newSVsv (pathname);	1020	req->sv1 = newSVsv (pathname);
1050	req->dataptr = SvPVbyte_nolen (req->data);	1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
1051		1022
1052	REQ_SEND;	1023	REQ_SEND;
1053	}	1024	}
1054		1025
1055	void	1026	void
1056	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1027	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1057	SV * oldpath
1058	SV * newpath
1059	SV * callback
1060	ALIAS:	1028	ALIAS:
1061	aio_link = REQ_LINK	1029	aio_link = EIO_LINK
1062	aio_symlink = REQ_SYMLINK	1030	aio_symlink = EIO_SYMLINK
1063	aio_rename = REQ_RENAME	1031	aio_rename = EIO_RENAME
1064	PPCODE:	1032	PPCODE:
1065	{	1033	{
1066	dREQ;	1034	dREQ;
1067		1035
1068	req->type = ix;	1036	req->type = ix;
1069	req->fh = newSVsv (oldpath);	1037	req->sv1 = newSVsv (oldpath);
1070	req->data2ptr = SvPVbyte_nolen (req->fh);	1038	req->ptr1 = SvPVbyte_nolen (req->sv1);
1071	req->data = newSVsv (newpath);	1039	req->sv2 = newSVsv (newpath);
1072	req->dataptr = SvPVbyte_nolen (req->data);	1040	req->ptr2 = SvPVbyte_nolen (req->sv2);
1073		1041
1074	REQ_SEND;	1042	REQ_SEND;
1075	}	1043	}
1076		1044
1077	void	1045	void
		1046	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1047	PPCODE:
		1048	{
		1049	dREQ;
		1050
		1051	req->type = EIO_MKNOD;
		1052	req->sv1 = newSVsv (pathname);
		1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1054	req->int2 = (mode_t)mode;
		1055	req->offs = dev;
		1056
		1057	REQ_SEND;
		1058	}
		1059
		1060	void
		1061	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1062	PPCODE:
		1063	{
		1064	dREQ;
		1065
		1066	req->type = EIO_BUSY;
		1067	req->nv1 = delay < 0. ? 0. : delay;
		1068
		1069	REQ_SEND;
		1070	}
		1071
		1072	void
1078	aio_group (callback=&PL_sv_undef)	1073	aio_group (SV *callback=&PL_sv_undef)
1079	SV * callback
1080	PROTOTYPE: ;&	1074	PROTOTYPE: ;$
1081	PPCODE:	1075	PPCODE:
1082	{	1076	{
1083	dREQ;	1077	dREQ;
		1078
1084	req->type = REQ_GROUP;	1079	req->type = EIO_GROUP;
		1080
		1081	req_submit (req);
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1082	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1083	}
		1084
		1085	void
		1086	aio_nop (SV *callback=&PL_sv_undef)
		1087	ALIAS:
		1088	aio_nop = EIO_NOP
		1089	aio_sync = EIO_SYNC
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->type = ix;
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	int
		1100	aioreq_pri (int pri = 0)
		1101	PROTOTYPE: ;$
		1102	CODE:
		1103	RETVAL = next_pri;
		1104	if (items > 0)
		1105	{
		1106	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1107	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1108	next_pri = pri;
		1109	}
		1110	OUTPUT:
		1111	RETVAL
		1112
		1113	void
		1114	aioreq_nice (int nice = 0)
		1115	CODE:
		1116	nice = next_pri - nice;
		1117	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1118	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1119	next_pri = nice;
1087		1120
1088	void	1121	void
1089	flush ()	1122	flush ()
1090	PROTOTYPE:	1123	PROTOTYPE:
1091	CODE:	1124	CODE:
1092	while (nreqs)	1125	while (eio_nreqs ())
1093	{	1126	{
1094	poll_wait ();	1127	poll_wait ();
1095	poll_cb ();	1128	poll_cb ();
1096	}	1129	}
1097		1130
1098	void	1131	int
1099	poll()	1132	poll()
1100	PROTOTYPE:	1133	PROTOTYPE:
1101	CODE:	1134	CODE:
1102	if (nreqs)
1103	{
1104	poll_wait ();	1135	poll_wait ();
1105	poll_cb ();	1136	RETVAL = poll_cb ();
1106	}	1137	OUTPUT:
		1138	RETVAL
1107		1139
1108	int	1140	int
1109	poll_fileno()	1141	poll_fileno()
1110	PROTOTYPE:	1142	PROTOTYPE:
1111	CODE:	1143	CODE:
…		…
1123		1155
1124	void	1156	void
1125	poll_wait()	1157	poll_wait()
1126	PROTOTYPE:	1158	PROTOTYPE:
1127	CODE:	1159	CODE:
1128	if (nreqs)
1129	poll_wait ();	1160	poll_wait ();
1130		1161
1131	int	1162	int
1132	nreqs()	1163	nreqs()
1133	PROTOTYPE:	1164	PROTOTYPE:
1134	CODE:	1165	CODE:
1135	RETVAL = nreqs;	1166	RETVAL = eio_nreqs ();
1136	OUTPUT:	1167	OUTPUT:
1137	RETVAL	1168	RETVAL
1138		1169
		1170	int
		1171	nready()
		1172	PROTOTYPE:
		1173	CODE:
		1174	RETVAL = eio_nready ();
		1175	OUTPUT:
		1176	RETVAL
		1177
		1178	int
		1179	npending()
		1180	PROTOTYPE:
		1181	CODE:
		1182	RETVAL = eio_npending ();
		1183	OUTPUT:
		1184	RETVAL
		1185
		1186	int
		1187	nthreads()
		1188	PROTOTYPE:
		1189	CODE:
		1190	RETVAL = eio_nthreads ();
		1191	OUTPUT:
		1192	RETVAL
		1193
		1194	int
		1195	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1196	PROTOTYPE: $$$$
		1197	CODE:
		1198	{
		1199	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1200	RETVAL = posix_fadvise (fh, offset, length, advice);
		1201	#else
		1202	RETVAL = errno = ENOSYS;
		1203	#endif
		1204	}
		1205	OUTPUT:
		1206	RETVAL
		1207
		1208	ssize_t
		1209	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1210	PROTOTYPE: $$$$
		1211	CODE:
		1212	eio_sendfile_sync (ofh, ifh, offset, count);
		1213
		1214	void _on_next_submit (SV *cb)
		1215	CODE:
		1216	SvREFCNT_dec (on_next_submit);
		1217	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1218
		1219	PROTOTYPES: DISABLE
		1220
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1221	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1222
1141	void	1223	void
1142	cancel (aio_req_ornot req)	1224	cancel (aio_req_ornot req)
1143	PROTOTYPE:	1225	CODE:
		1226	eio_cancel (req);
		1227
		1228	void
		1229	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1144	CODE:	1230	PPCODE:
1145	req->cancelled = 1;	1231	{
		1232	if (GIMME_V != G_VOID)
		1233	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
1146		1234
		1235	if (items > 1)
		1236	{
		1237	SV *cb_cv = get_cb (callback);
		1238
		1239	SvREFCNT_dec (req->callback);
		1240	req->callback = SvREFCNT_inc (cb_cv);
		1241	}
		1242	}
		1243
		1244	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1245
		1246	void
		1247	add (aio_req grp, ...)
		1248	PPCODE:
		1249	{
		1250	int i;
		1251
		1252	if (grp->int1 == 2)
		1253	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1254
		1255	for (i = 1; i < items; ++i )
		1256	{
		1257	aio_req req;
		1258
		1259	if (GIMME_V != G_VOID)
		1260	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1261
		1262	req = SvAIO_REQ (ST (i));
		1263
		1264	if (req)
		1265	eio_grp_add (grp, req);
		1266	}
		1267	}
		1268
		1269	void
		1270	cancel_subs (aio_req_ornot req)
		1271	CODE:
		1272	req_cancel_subs (req);
		1273
		1274	void
		1275	result (aio_req grp, ...)
		1276	CODE:
		1277	{
		1278	int i;
		1279	AV *av;
		1280
		1281	grp->errorno = errno;
		1282
		1283	av = newAV ();
		1284	av_extend (av, items - 1);
		1285
		1286	for (i = 1; i < items; ++i )
		1287	av_push (av, newSVsv (ST (i)));
		1288
		1289	SvREFCNT_dec (grp->sv1);
		1290	grp->sv1 = (SV *)av;
		1291	}
		1292
		1293	void
		1294	errno (aio_req grp, int errorno = errno)
		1295	CODE:
		1296	grp->errorno = errorno;
		1297
		1298	void
		1299	limit (aio_req grp, int limit)
		1300	CODE:
		1301	eio_grp_limit (grp, limit);
		1302
		1303	void
		1304	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1305	CODE:
		1306	{
		1307	SvREFCNT_dec (grp->sv2);
		1308	grp->sv2 = newSVsv (callback);
		1309	grp->feed = aio_grp_feed;
		1310
		1311	if (grp->int2 <= 0)
		1312	grp->int2 = 2;
		1313
		1314	eio_grp_limit (grp, grp->int2);
		1315	}
		1316

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