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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.154 by root, Wed Jul 15 01:39:15 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	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
13	#include <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
15	#include <limits.h>	16	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	17	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	18	#include <sched.h>
20		19
21	#if HAVE_SENDFILE	20	/* perl namespace pollution */
22	# if __linux	21	#undef VERSION
23	# include <sys/sendfile.h>	22
24	# elif __freebsd	23	#ifdef _WIN32
25	# include <sys/socket.h>	24
26	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __hpux	26	# undef malloc
28	# include <sys/socket.h>	27	# undef free
29	# elif __solaris /* not yet */	28
30	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
31	# else	61	#else
32	# error sendfile support requested but not available	62
33	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
34	#endif	70	#endif
35		71
36	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
37	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
38	# define NAME_MAX 4096	74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
39	#endif	89	#endif
40		90
41	#if __ia64	91	/*****************************************************************************/
42	# define STACKSIZE 65536	92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
43	#else	95	#else
44	# define STACKSIZE 8192	96	# define expect(expr,value) (expr)
45	#endif	97	#endif
46		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	static HV *stash;
		105	typedef SV SV8; /* byte-sv, used for argument-checking */
		106	typedef int aio_rfd; /* read file desriptor */
		107	typedef int aio_wfd; /* write file descriptor */
		108
		109	#define AIO_REQ_KLASS "IO::AIO::REQ"
		110	#define AIO_GRP_KLASS "IO::AIO::GRP"
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	STRLEN stroffset; \
		116	SV *self;
		117
		118	#define EIO_NO_WRAPPERS 1
		119
		120	#include "libeio/eio.h"
		121
		122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
		151
47	enum {	152	enum {
48	REQ_QUIT,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
49	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,
55	REQ_READDIR,
56	REQ_SYMLINK,
57	};	154	};
58		155
59	typedef struct aio_cb {	156	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		157
62	int type;
63
64	/* should receive a cleanup, with unions */
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75
76	Stat_t *statdata;
77	} aio_cb;
78
79	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
		159	typedef eio_req *aio_req_ornot;
80		160
81	static int started, wanted;	161	static SV *on_next_submit;
82	static volatile int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
83	static int max_outstanding = 1<<30;	163	static int max_outstanding;
84	static int respipe [2];
85		164
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	165	static s_epipe respipe;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		166
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	167	static void req_destroy (aio_req req);
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)	168	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	s_epipe_signal (&respipe);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	s_epipe_drain (&respipe);
		180	}
		181
		182	/* must be called at most once */
		183	static SV *req_sv (aio_req req, const char *klass)
		184	{
		185	if (!req->self)
		186	{
		187	req->self = (SV *)newHV ();
		188	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		189	}
		190
		191	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		192	}
		193
		194	static aio_req SvAIO_REQ (SV *sv)
		195	{
		196	MAGIC *mg;
		197
		198	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		199	croak ("object of class " AIO_REQ_KLASS " expected");
		200
		201	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		202
		203	return mg ? (aio_req)mg->mg_ptr : 0;
		204	}
		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
		416	static void req_destroy (aio_req req)
		417	{
98	if (req->fh)	418	if (req->self)
		419	{
		420	sv_unmagic (req->self, PERL_MAGIC_ext);
99	SvREFCNT_dec (req->fh);	421	SvREFCNT_dec (req->self);
		422	}
100		423
101	if (req->fh2)	424	SvREFCNT_dec (req->sv1);
102	SvREFCNT_dec (req->fh2);	425	SvREFCNT_dec (req->sv2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112		427
113	Safefree (req);	428	Safefree (req);
114	}	429	}
115		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
116	static void	444	static void
117	poll_wait ()	445	create_respipe (void)
118	{	446	{
119	if (nreqs && !ress)	447	if (s_epipe_renew (&respipe))
		448	croak ("unable to initialize result pipe");
		449	}
		450
		451	static void poll_wait (void)
		452	{
		453	while (eio_nreqs ())
120	{	454	{
121	fd_set rfd;	455	int size;
122	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);
124		456
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	457	X_LOCK (reslock);
		458	size = res_queue.size;
		459	X_UNLOCK (reslock);
		460
		461	if (size)
		462	return;
		463
		464	etp_maybe_start_thread ();
		465
		466	s_epipe_wait (&respipe);
126	}	467	}
127	}	468	}
128		469
129	static int	470	static int poll_cb (void)
130	poll_cb ()
131	{	471	{
132	dSP;
133	int count = 0;
134	int do_croak = 0;
135	aio_req req;
136
137	for (;;)	472	for (;;)
138	{	473	{
139	pthread_mutex_lock (&reslock);	474	int res = eio_poll ();
140	req = ress;
141		475
142	if (req)	476	if (res > 0)
143	{
144	ress = req->next;
145
146	if (!ress)
147	{
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152
153	rese = 0;
154	}
155	}
156
157	pthread_mutex_unlock (&reslock);
158
159	if (!req)
160	break;
161
162	nreqs--;
163
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);	477	croak (0);
240	}
241	}
242		478
243	LEAVE;	479	if (!max_outstanding || max_outstanding > eio_nreqs ())
		480	return res;
244		481
245	errno = errorno;	482	poll_wait ();
246	count++;
247	}
248
249	free_req (req);
250	}	483	}
251
252	return count;
253	}	484	}
254		485
255	static void *aio_proc(void *arg);	486	static void atfork_child (void)
256
257	static void
258	start_thread (void)
259	{	487	{
260	sigset_t fullsigset, oldsigset;	488	create_respipe ();
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}	489	}
276		490
277	static void	491	static SV *
278	send_req (aio_req req)	492	get_cb (SV *cb_sv)
279	{	493	{
280	while (started < wanted && nreqs >= started)	494	SvGETMAGIC (cb_sv);
281	start_thread ();	495	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
282
283	nreqs++;
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}	496	}
311		497
312	static void	498	#define dREQ \
313	end_thread (void)	499	SV *cb_cv; \
314	{
315	aio_req req;	500	aio_req req; \
		501	int req_pri = next_pri; \
		502	next_pri = EIO_PRI_DEFAULT; \
		503	\
		504	cb_cv = get_cb (callback); \
		505	\
316	Newz (0, req, 1, aio_cb);	506	Newz (0, req, 1, eio_req); \
317	req->type = REQ_QUIT;	507	if (!req) \
		508	croak ("out of memory during eio_req allocation"); \
		509	\
		510	req->callback = SvREFCNT_inc (cb_cv); \
		511	req->pri = req_pri
318		512
319	send_req (req);	513	#define REQ_SEND \
320	}	514	PUTBACK; \
		515	req_submit (req); \
		516	SPAGAIN; \
		517	\
		518	if (GIMME_V != G_VOID) \
		519	XPUSHs (req_sv (req, AIO_REQ_KLASS));
321		520
322	static void min_parallel (int nthreads)	521	MODULE = IO::AIO PACKAGE = IO::AIO
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327		522
328	static void max_parallel (int nthreads)	523	PROTOTYPES: ENABLE
329	{
330	int cur = started;
331		524
332	if (wanted > nthreads)	525	BOOT:
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}
347
348	static void create_pipe ()
349	{	526	{
350	if (pipe (respipe))	527	static const struct {
351	croak ("unable to initialize result pipe");	528	const char *name;
352		529	IV iv;
353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	530	} *civ, const_iv[] = {
354	croak ("cannot set result pipe to nonblocking mode");	531	# define const_iv(name, value) { # name, (IV) value },
355		532	# define const_eio(name) { # name, (IV) EIO_ ## name },
356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	533	const_iv (EXDEV , EXDEV)
357	croak ("cannot set result pipe to nonblocking mode");	534	const_iv (ENOSYS , ENOSYS)
358	}	535	const_iv (O_RDONLY, O_RDONLY)
359		536	const_iv (O_WRONLY, O_WRONLY)
360	/*****************************************************************************/	537	const_iv (O_CREAT , O_CREAT)
361	/* work around various missing functions */	538	const_iv (O_TRUNC , O_TRUNC)
362		539	#ifndef _WIN32
363	#if !HAVE_PREADWRITE	540	const_iv (S_IFIFO , S_IFIFO)
364	# define pread aio_pread
365	# define pwrite aio_pwrite
366
367	/*
368	* make our pread/pwrite safe against themselves, but not against
369	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.
371	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374	static ssize_t
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{
377	ssize_t res;
378	off_t ooffset;
379
380	pthread_mutex_lock (&preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386
387	return res;
388	}
389
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395
396	pthread_mutex_lock (&preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);
402
403	return res;
404	}
405	#endif	541	#endif
		542	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		543	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		544	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		545	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		546	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		547	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
406		548
407	#if !HAVE_FDATASYNC	549	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
408	# define fdatasync fsync	550	const_eio (SYNC_FILE_RANGE_WRITE)
409	#endif	551	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
410		552
411	#if !HAVE_READAHEAD	553	const_eio (READDIR_DENTS)
412	# define readahead aio_readahead	554	const_eio (READDIR_DIRS_FIRST)
		555	const_eio (READDIR_STAT_ORDER)
		556	const_eio (READDIR_FOUND_UNKNOWN)
413		557
414	static ssize_t	558	const_eio (DT_UNKNOWN)
415	readahead (int fd, off_t offset, size_t count)	559	const_eio (DT_FIFO)
416	{	560	const_eio (DT_CHR)
417	char readahead_buf[4096];	561	const_eio (DT_DIR)
418		562	const_eio (DT_BLK)
419	while (count > 0)	563	const_eio (DT_REG)
420	{	564	const_eio (DT_LNK)
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	565	const_eio (DT_SOCK)
422		566	const_eio (DT_WHT)
423	pread (fd, readahead_buf, len, offset);
424	offset += len;
425	count -= len;
426	}
427
428	errno = 0;
429	}
430	#endif
431
432	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r
434
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{
440	struct dirent *e;
441	int errorno;
442
443	pthread_mutex_lock (&readdirlock);
444
445	e = readdir (dirp);
446	errorno = errno;
447
448	if (e)
449	{
450	*res = ent;
451	strcpy (ent->d_name, e->d_name);
452	}
453	else
454	*res = 0;
455
456	pthread_mutex_unlock (&readdirlock);
457
458	errno = errorno;
459	return e ? 0 : -1;
460	}
461	#endif
462
463	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466	{
467	ssize_t res;
468
469	if (!count)
470	return 0;
471
472	#if HAVE_SENDFILE
473	# if __linux
474	res = sendfile (ofd, ifd, &offset, count);
475
476	# elif __freebsd
477	/*
478	* Of course, the freebsd sendfile is a dire hack with no thoughts
479	* wasted on making it similar to other I/O functions.
480	*/
481	{
482	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484
485	if (res < 0 && sbytes)
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487	res = sbytes;
488	}	567	};
489		568
490	# elif __hpux	569	stash = gv_stashpv ("IO::AIO", 1);
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492		570
493	# elif __solaris	571	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
494	{	572	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
495	struct sendfilevec vec;
496	size_t sbytes;
497		573
498	vec.sfv_fd = ifd;
499	vec.sfv_flag = 0;
500	vec.sfv_off = offset;
501	vec.sfv_len = count;
502
503	res = sendfilev (ofd, &vec, 1, &sbytes);
504
505	if (res < 0 && sbytes)
506	res = sbytes;
507	}
508
509	# endif
510	#else
511	res = -1;
512	errno = ENOSYS;
513	#endif
514
515	if (res < 0
516	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517	#if __solaris
518	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
519	#endif
520	)
521	)
522	{
523	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];
525	res = 0;
526
527	while (count)
528	{
529	ssize_t cnt;
530
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
532
533	if (cnt <= 0)
534	{
535	if (cnt && !res) res = -1;
536	break;
537	}
538
539	cnt = write (ofd, buf, cnt);
540
541	if (cnt <= 0)
542	{
543	if (cnt && !res) res = -1;
544	break;
545	}
546
547	offset += cnt;
548	res += cnt;
549	count -= cnt;
550	}
551	}
552
553	return res;
554	}
555
556	/* read a full directory */
557	static int
558	scandir_ (const char *path, void **namesp)
559	{
560	DIR *dirp = opendir (path);
561	union
562	{
563	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;
566	struct dirent *entp;
567	char *name, *names;
568	int memlen = 4096;
569	int memofs = 0;
570	int res = 0;
571	int errorno;
572
573	if (!dirp)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
675
676	case REQ_QUIT:
677	break;
678
679	default:
680	req->result = ENOSYS;
681	break;
682	}
683
684	req->errorno = errno;
685
686	pthread_mutex_lock (&reslock);
687
688	req->next = 0;
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);
701	}
702
703	pthread_mutex_unlock (&reslock);
704	}
705	while (type != REQ_QUIT);
706
707	return 0;
708	}
709
710	/*****************************************************************************/
711
712	static void atfork_prepare (void)
713	{
714	pthread_mutex_lock (&reqlock);
715	pthread_mutex_lock (&reslock);
716	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);
718	#endif
719	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);
721	#endif
722	}
723
724	static void atfork_parent (void)
725	{
726	#if !HAVE_READDIR_R
727	pthread_mutex_unlock (&readdirlock);
728	#endif
729	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);
731	#endif
732	pthread_mutex_unlock (&reslock);
733	pthread_mutex_unlock (&reqlock);
734	}
735
736	static void atfork_child (void)
737	{
738	aio_req prv;
739
740	started = 0;
741
742	while (reqs)
743	{
744	prv = reqs;
745	reqs = prv->next;
746	free_req (prv);
747	}
748
749	reqs = reqe = 0;
750
751	while (ress)
752	{
753	prv = ress;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759
760	close (respipe [0]);
761	close (respipe [1]);
762	create_pipe ();	574	create_respipe ();
763		575
764	atfork_parent ();	576	if (eio_init (want_poll, done_poll) < 0)
765	}	577	croak ("IO::AIO: unable to initialise eio library");
766		578
767	#define dREQ \	579	/* atfork child called in fifo order, so before eio's handler */
768	aio_req req; \	580	X_THREAD_ATFORK (0, 0, atfork_child);
769	\
770	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \
772	\
773	Newz (0, req, 1, aio_cb); \
774	if (!req) \
775	croak ("out of memory during aio_req allocation"); \
776	\
777	req->callback = newSVsv (callback);
778
779	MODULE = IO::AIO PACKAGE = IO::AIO
780
781	PROTOTYPES: ENABLE
782
783	BOOT:
784	{
785	create_pipe ();
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}	581	}
788		582
789	void	583	void
790	min_parallel(nthreads)	584	max_poll_reqs (int nreqs)
791	int nthreads
792	PROTOTYPE: $	585	PROTOTYPE: $
		586	CODE:
		587	eio_set_max_poll_reqs (nreqs);
793		588
794	void	589	void
795	max_parallel(nthreads)	590	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	591	PROTOTYPE: $
798
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:	592	CODE:
804	RETVAL = max_outstanding;	593	eio_set_max_poll_time (nseconds);
		594
		595	void
		596	min_parallel (int nthreads)
		597	PROTOTYPE: $
		598	CODE:
		599	eio_set_min_parallel (nthreads);
		600
		601	void
		602	max_parallel (int nthreads)
		603	PROTOTYPE: $
		604	CODE:
		605	eio_set_max_parallel (nthreads);
		606
		607	void
		608	max_idle (int nthreads)
		609	PROTOTYPE: $
		610	CODE:
		611	eio_set_max_idle (nthreads);
		612
		613	void
		614	max_outstanding (int maxreqs)
		615	PROTOTYPE: $
		616	CODE:
805	max_outstanding = nreqs;	617	max_outstanding = maxreqs;
806		618
807	void	619	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	620	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
809	SV * pathname
810	int flags
811	int mode
812	SV * callback
813	PROTOTYPE: $$$;$	621	PROTOTYPE: $$$;$
814	CODE:	622	PPCODE:
815	{	623	{
816	dREQ;	624	dREQ;
817		625
818	req->type = REQ_OPEN;	626	req->type = EIO_OPEN;
819	req->data = newSVsv (pathname);	627	req->sv1 = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	628	req->ptr1 = SvPVbyte_nolen (req->sv1);
821	req->fd = flags;	629	req->int1 = flags;
822	req->mode = mode;	630	req->int2 = mode;
823		631
824	send_req (req);	632	REQ_SEND;
825	}	633	}
826		634
827	void	635	void
828	aio_close(fh,callback=&PL_sv_undef)	636	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
829	SV * fh
830	SV * callback
831	PROTOTYPE: $;$	637	PROTOTYPE: $;$
832	ALIAS:	638	ALIAS:
833	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	639	aio_fsync = EIO_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	640	aio_fdatasync = EIO_FDATASYNC
836	CODE:	641	PPCODE:
837	{	642	{
		643	int fd = s_fileno_croak (fh, 0);
838	dREQ;	644	dREQ;
839		645
840	req->type = ix;	646	req->type = ix;
841	req->fh = newSVsv (fh);	647	req->sv1 = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	648	req->int1 = fd;
843		649
844	send_req (req);	650	REQ_SEND (req);
845	}	651	}
846		652
847	void	653	void
		654	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		655	PROTOTYPE: $$$$;$
		656	PPCODE:
		657	{
		658	int fd = s_fileno_croak (fh, 0);
		659	dREQ;
		660
		661	req->type = EIO_SYNC_FILE_RANGE;
		662	req->sv1 = newSVsv (fh);
		663	req->int1 = fd;
		664	req->offs = offset;
		665	req->size = nbytes;
		666	req->int2 = flags;
		667
		668	REQ_SEND (req);
		669	}
		670
		671	void
		672	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $;$
		674	PPCODE:
		675	{
		676	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		677	int fd = s_fileno_croak (fh, 0);
		678	dREQ;
		679
		680	if (close_pipe < 0)
		681	{
		682	int pipefd [2];
		683
		684	if (pipe (pipefd) < 0
		685	|| close (pipefd [1]) < 0
		686	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		687	abort (); /*D*/
		688
		689	close_pipe = pipefd [0];
		690	}
		691
		692	req->type = EIO_DUP2;
		693	req->int1 = close_pipe;
		694	req->sv2 = newSVsv (fh);
		695	req->int2 = fd;
		696
		697	REQ_SEND (req);
		698	}
		699
		700	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	701	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
849	SV * fh
850	UV offset
851	UV length
852	SV * data
853	UV dataoffset
854	SV * callback
855	ALIAS:	702	ALIAS:
856	aio_read = REQ_READ	703	aio_read = EIO_READ
857	aio_write = REQ_WRITE	704	aio_write = EIO_WRITE
858	PROTOTYPE: $$$$$;$	705	PROTOTYPE: $$$$$;$
859	CODE:	706	PPCODE:
860	{	707	{
861	aio_req req;
862	STRLEN svlen;	708	STRLEN svlen;
		709	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
863	char *svptr = SvPVbyte (data, svlen);	710	char *svptr = SvPVbyte (data, svlen);
864		711	UV len = SvUV (length);
865	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);
867		712
868	if (dataoffset < 0)	713	if (dataoffset < 0)
869	dataoffset += svlen;	714	dataoffset += svlen;
870		715
871	if (dataoffset < 0 || dataoffset > svlen)	716	if (dataoffset < 0 || dataoffset > svlen)
872	croak ("data offset outside of string");	717	croak ("dataoffset outside of data scalar");
873		718
874	if (ix == REQ_WRITE)	719	if (ix == EIO_WRITE)
875	{	720	{
876	/* write: check length and adjust. */	721	/* write: check length and adjust. */
877	if (length < 0 || length + dataoffset > svlen)	722	if (!SvOK (length) || len + dataoffset > svlen)
878	length = svlen - dataoffset;	723	len = svlen - dataoffset;
879	}	724	}
880	else	725	else
881	{	726	{
882	/* read: grow scalar as necessary */	727	/* read: check type and grow scalar as necessary */
		728	SvUPGRADE (data, SVt_PV);
883	svptr = SvGROW (data, length + dataoffset);	729	svptr = SvGROW (data, len + dataoffset + 1);
884	}	730	}
885
886	if (length < 0)
887	croak ("length must not be negative");
888		731
889	{	732	{
890	dREQ;	733	dREQ;
891		734
892	req->type = ix;	735	req->type = ix;
893	req->fh = newSVsv (fh);	736	req->sv1 = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	737	req->int1 = fd;
895	: IoOFP (sv_2io (fh)));	738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
896	req->offset = offset;	739	req->size = len;
897	req->length = length;
898	req->data = SvREFCNT_inc (data);	740	req->sv2 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	741	req->ptr2 = (char *)svptr + dataoffset;
		742	req->stroffset = dataoffset;
900		743
901	if (!SvREADONLY (data))	744	if (!SvREADONLY (data))
902	{	745	{
903	SvREADONLY_on (data);	746	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	747	req->flags |= FLAG_SV2_RO_OFF;
905	}	748	}
906		749
907	send_req (req);	750	REQ_SEND;
908	}	751	}
909	}	752	}
910		753
911	void	754	void
		755	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		756	PROTOTYPE: $$;$
		757	PPCODE:
		758	{
		759	SV *data;
		760	dREQ;
		761
		762	req->type = EIO_READLINK;
		763	req->sv1 = newSVsv (path);
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765
		766	REQ_SEND;
		767	}
		768
		769	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	770	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
913	SV * out_fh
914	SV * in_fh
915	UV in_offset
916	UV length
917	SV * callback
918	PROTOTYPE: $$$$;$	771	PROTOTYPE: $$$$;$
919	CODE:	772	PPCODE:
920	{	773	{
		774	int ifd = s_fileno_croak (in_fh , 0);
		775	int ofd = s_fileno_croak (out_fh, 1);
921	dREQ;	776	dREQ;
922		777
923	req->type = REQ_SENDFILE;	778	req->type = EIO_SENDFILE;
924	req->fh = newSVsv (out_fh);	779	req->sv1 = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	780	req->int1 = ofd;
926	req->fh2 = newSVsv (in_fh);	781	req->sv2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	782	req->int2 = ifd;
928	req->offset = in_offset;	783	req->offs = in_offset;
929	req->length = length;	784	req->size = length;
930		785
931	send_req (req);	786	REQ_SEND;
932	}	787	}
933		788
934	void	789	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	790	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
936	SV * fh
937	UV offset
938	IV length
939	SV * callback
940	PROTOTYPE: $$$;$	791	PROTOTYPE: $$$;$
941	CODE:	792	PPCODE:
942	{	793	{
		794	int fd = s_fileno_croak (fh, 0);
943	dREQ;	795	dREQ;
944		796
945	req->type = REQ_READAHEAD;	797	req->type = EIO_READAHEAD;
946	req->fh = newSVsv (fh);	798	req->sv1 = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	799	req->int1 = fd;
948	req->offset = offset;	800	req->offs = offset;
949	req->length = length;	801	req->size = length;
950		802
951	send_req (req);	803	REQ_SEND;
952	}	804	}
953		805
954	void	806	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	807	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
956	SV * fh_or_path
957	SV * callback
958	ALIAS:	808	ALIAS:
959	aio_stat = REQ_STAT	809	aio_stat = EIO_STAT
960	aio_lstat = REQ_LSTAT	810	aio_lstat = EIO_LSTAT
961	CODE:	811	PPCODE:
962	{	812	{
963	dREQ;	813	dREQ;
964		814
965	New (0, req->statdata, 1, Stat_t);	815	req->sv1 = newSVsv (fh_or_path);
966	if (!req->statdata)
967	{
968	free_req (req);
969	croak ("out of memory during aio_req->statdata allocation");
970	}
971		816
972	if (SvPOK (fh_or_path))	817	if (SvPOK (req->sv1))
973	{	818	{
974	req->type = ix;	819	req->type = ix;
975	req->data = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);	820	req->ptr1 = SvPVbyte_nolen (req->sv1);
977	}	821	}
978	else	822	else
979	{	823	{
980	req->type = REQ_FSTAT;	824	req->type = EIO_FSTAT;
981	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	825	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		826	}
		827
		828	REQ_SEND;
		829	}
		830
		831	void
		832	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		833	PPCODE:
		834	{
		835	dREQ;
		836
		837	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		838	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
983	}	842	{
		843	req->type = EIO_UTIME;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FUTIME;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
984		851
985	send_req (req);	852	REQ_SEND;
986	}	853	}
987		854
988	void	855	void
		856	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->sv1 = newSVsv (fh_or_path);
		862	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		863
		864	if (SvPOK (req->sv1))
		865	{
		866	req->type = EIO_TRUNCATE;
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	}
		869	else
		870	{
		871	req->type = EIO_FTRUNCATE;
		872	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		873	}
		874
		875	REQ_SEND;
		876	}
		877
		878	void
		879	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		880	ALIAS:
		881	aio_chmod = EIO_CHMOD
		882	aio_mkdir = EIO_MKDIR
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->int2 = mode;
		888	req->sv1 = newSVsv (fh_or_path);
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = ix;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FCHMOD;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		906	PPCODE:
		907	{
		908	dREQ;
		909
		910	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		911	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		912	req->sv1 = newSVsv (fh_or_path);
		913
		914	if (SvPOK (req->sv1))
		915	{
		916	req->type = EIO_CHOWN;
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	}
		919	else
		920	{
		921	req->type = EIO_FCHOWN;
		922	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		923	}
		924
		925	REQ_SEND;
		926	}
		927
		928	void
		929	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		930	PPCODE:
		931	{
		932	dREQ;
		933
		934	req->type = EIO_READDIR;
		935	req->sv1 = newSVsv (pathname);
		936	req->ptr1 = SvPVbyte_nolen (req->sv1);
		937	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		938
		939	if (flags & EIO_READDIR_DENTS)
		940	req->int1 |= EIO_READDIR_CUSTOM2;
		941
		942	REQ_SEND;
		943	}
		944
		945	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	946	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
990	SV * pathname
991	SV * callback
992	ALIAS:	947	ALIAS:
993	aio_unlink = REQ_UNLINK	948	aio_unlink = EIO_UNLINK
994	aio_rmdir = REQ_RMDIR	949	aio_rmdir = EIO_RMDIR
		950	aio_readdir = EIO_READDIR
995	CODE:	951	PPCODE:
996	{	952	{
997	dREQ;	953	dREQ;
998		954
999	req->type = ix;	955	req->type = ix;
1000	req->data = newSVsv (pathname);	956	req->sv1 = newSVsv (pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);	957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958
		959	REQ_SEND;
		960	}
		961
		962	void
		963	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		964	ALIAS:
		965	aio_link = EIO_LINK
		966	aio_symlink = EIO_SYMLINK
		967	aio_rename = EIO_RENAME
		968	PPCODE:
		969	{
		970	dREQ;
1002		971
1003	send_req (req);	972	req->type = ix;
1004	}	973	req->sv1 = newSVsv (oldpath);
1005		974	req->ptr1 = SvPVbyte_nolen (req->sv1);
1006	void	975	req->sv2 = newSVsv (newpath);
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	976	req->ptr2 = SvPVbyte_nolen (req->sv2);
1008	SV * oldpath
1009	SV * newpath
1010	SV * callback
1011	CODE:
1012	{
1013	dREQ;
1014		977
1015	req->type = REQ_SYMLINK;	978	REQ_SEND;
1016	req->fh = newSVsv (oldpath);	979	}
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	980
1018	req->data = newSVsv (newpath);	981	void
1019	req->dataptr = SvPVbyte_nolen (req->data);	982	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		983	PPCODE:
		984	{
		985	dREQ;
1020		986
1021	send_req (req);	987	req->type = EIO_MKNOD;
1022	}	988	req->sv1 = newSVsv (pathname);
1023		989	req->ptr1 = SvPVbyte_nolen (req->sv1);
1024	void	990	req->int2 = (mode_t)mode;
1025	aio_readdir(pathname,callback=&PL_sv_undef)	991	req->offs = dev;
1026	SV * pathname
1027	SV * callback
1028	CODE:
1029	{
1030	dREQ;
1031		992
		993	REQ_SEND;
		994	}
		995
		996	void
		997	aio_busy (double delay, SV *callback=&PL_sv_undef)
		998	PPCODE:
		999	{
		1000	dREQ;
		1001
		1002	req->type = EIO_BUSY;
		1003	req->nv1 = delay < 0. ? 0. : delay;
		1004
		1005	REQ_SEND;
		1006	}
		1007
		1008	void
		1009	aio_group (SV *callback=&PL_sv_undef)
		1010	PROTOTYPE: ;$
		1011	PPCODE:
		1012	{
		1013	dREQ;
		1014
		1015	req->type = EIO_GROUP;
		1016
		1017	req_submit (req);
		1018	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1019	}
		1020
		1021	void
		1022	aio_nop (SV *callback=&PL_sv_undef)
		1023	ALIAS:
		1024	aio_nop = EIO_NOP
		1025	aio_sync = EIO_SYNC
		1026	PPCODE:
		1027	{
		1028	dREQ;
		1029
1032	req->type = REQ_READDIR;	1030	req->type = ix;
1033	req->data = newSVsv (pathname);
1034	req->dataptr = SvPVbyte_nolen (req->data);
1035
1036	send_req (req);
1037	}
1038		1031
		1032	REQ_SEND;
		1033	}
		1034
		1035	int
		1036	aioreq_pri (int pri = 0)
		1037	PROTOTYPE: ;$
		1038	CODE:
		1039	RETVAL = next_pri;
		1040	if (items > 0)
		1041	{
		1042	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1043	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1044	next_pri = pri;
		1045	}
		1046	OUTPUT:
		1047	RETVAL
		1048
1039	void	1049	void
		1050	aioreq_nice (int nice = 0)
		1051	CODE:
		1052	nice = next_pri - nice;
		1053	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1054	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1055	next_pri = nice;
		1056
		1057	void
1040	flush()	1058	flush ()
1041	PROTOTYPE:	1059	PROTOTYPE:
1042	CODE:	1060	CODE:
1043	while (nreqs)	1061	while (eio_nreqs ())
1044	{	1062	{
1045	poll_wait ();	1063	poll_wait ();
1046	poll_cb ();	1064	poll_cb ();
1047	}	1065	}
1048		1066
1049	void	1067	int
1050	poll()	1068	poll()
1051	PROTOTYPE:	1069	PROTOTYPE:
1052	CODE:	1070	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	1071	poll_wait ();
1056	poll_cb ();	1072	RETVAL = poll_cb ();
1057	}	1073	OUTPUT:
		1074	RETVAL
1058		1075
1059	int	1076	int
1060	poll_fileno()	1077	poll_fileno()
1061	PROTOTYPE:	1078	PROTOTYPE:
1062	CODE:	1079	CODE:
1063	RETVAL = respipe [0];	1080	RETVAL = s_epipe_fd (&respipe);
1064	OUTPUT:	1081	OUTPUT:
1065	RETVAL	1082	RETVAL
1066		1083
1067	int	1084	int
1068	poll_cb(...)	1085	poll_cb(...)
…		…
1074		1091
1075	void	1092	void
1076	poll_wait()	1093	poll_wait()
1077	PROTOTYPE:	1094	PROTOTYPE:
1078	CODE:	1095	CODE:
1079	if (nreqs)
1080	poll_wait ();	1096	poll_wait ();
1081		1097
1082	int	1098	int
1083	nreqs()	1099	nreqs()
1084	PROTOTYPE:	1100	PROTOTYPE:
1085	CODE:	1101	CODE:
1086	RETVAL = nreqs;	1102	RETVAL = eio_nreqs ();
1087	OUTPUT:	1103	OUTPUT:
1088	RETVAL	1104	RETVAL
1089		1105
		1106	int
		1107	nready()
		1108	PROTOTYPE:
		1109	CODE:
		1110	RETVAL = eio_nready ();
		1111	OUTPUT:
		1112	RETVAL
		1113
		1114	int
		1115	npending()
		1116	PROTOTYPE:
		1117	CODE:
		1118	RETVAL = eio_npending ();
		1119	OUTPUT:
		1120	RETVAL
		1121
		1122	int
		1123	nthreads()
		1124	PROTOTYPE:
		1125	CODE:
		1126	RETVAL = eio_nthreads ();
		1127	OUTPUT:
		1128	RETVAL
		1129
		1130	int
		1131	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1132	PROTOTYPE: $$$$
		1133	CODE:
		1134	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1135	RETVAL = posix_fadvise (fh, offset, length, advice);
		1136	#else
		1137	RETVAL = errno = ENOSYS;
		1138	#endif
		1139	OUTPUT:
		1140	RETVAL
		1141
		1142	ssize_t
		1143	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1144	PROTOTYPE: $$$$
		1145	CODE:
		1146	eio_sendfile_sync (ofh, ifh, offset, count);
		1147
		1148	void _on_next_submit (SV *cb)
		1149	CODE:
		1150	SvREFCNT_dec (on_next_submit);
		1151	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1152
		1153	PROTOTYPES: DISABLE
		1154
		1155	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1156
		1157	void
		1158	cancel (aio_req_ornot req)
		1159	CODE:
		1160	eio_cancel (req);
		1161
		1162	void
		1163	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	if (GIMME_V != G_VOID)
		1167	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1168
		1169	if (items > 1)
		1170	{
		1171	SV *cb_cv =get_cb (callback);
		1172
		1173	SvREFCNT_dec (req->callback);
		1174	req->callback = SvREFCNT_inc (cb_cv);
		1175	}
		1176	}
		1177
		1178	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1179
		1180	void
		1181	add (aio_req grp, ...)
		1182	PPCODE:
		1183	{
		1184	int i;
		1185
		1186	if (grp->int1 == 2)
		1187	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1188
		1189	for (i = 1; i < items; ++i )
		1190	{
		1191	aio_req req;
		1192
		1193	if (GIMME_V != G_VOID)
		1194	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1195
		1196	req = SvAIO_REQ (ST (i));
		1197
		1198	if (req)
		1199	eio_grp_add (grp, req);
		1200	}
		1201	}
		1202
		1203	void
		1204	cancel_subs (aio_req_ornot req)
		1205	CODE:
		1206	req_cancel_subs (req);
		1207
		1208	void
		1209	result (aio_req grp, ...)
		1210	CODE:
		1211	{
		1212	int i;
		1213	AV *av;
		1214
		1215	grp->errorno = errno;
		1216
		1217	av = newAV ();
		1218	av_extend (av, items - 1);
		1219
		1220	for (i = 1; i < items; ++i )
		1221	av_push (av, newSVsv (ST (i)));
		1222
		1223	SvREFCNT_dec (grp->sv1);
		1224	grp->sv1 = (SV *)av;
		1225	}
		1226
		1227	void
		1228	errno (aio_req grp, int errorno = errno)
		1229	CODE:
		1230	grp->errorno = errorno;
		1231
		1232	void
		1233	limit (aio_req grp, int limit)
		1234	CODE:
		1235	eio_grp_limit (grp, limit);
		1236
		1237	void
		1238	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1239	CODE:
		1240	{
		1241	SvREFCNT_dec (grp->sv2);
		1242	grp->sv2 = newSVsv (callback);
		1243	grp->feed = aio_grp_feed;
		1244
		1245	if (grp->int2 <= 0)
		1246	grp->int2 = 2;
		1247
		1248	eio_grp_limit (grp, grp->int2);
		1249	}
		1250

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