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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 1.157 by root, Sat Jan 2 12:58:37 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
16	#include <limits.h>	16	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	17	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	18	#include <sched.h>
21		19
22	#if HAVE_SENDFILE	20	/* perl namespace pollution */
23	# if __linux	21	#undef VERSION
24	# include <sys/sendfile.h>	22
25	# elif __freebsd	23	#ifdef _WIN32
26	# include <sys/socket.h>	24
27	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
28	# elif __hpux	26	# undef malloc
29	# include <sys/socket.h>	27	# undef free
30	# elif __solaris /* not yet */	28
31	# 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
32	# else	61	#else
33	# error sendfile support requested but not available	62
34	# 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
35	#endif	70	#endif
36		71
37	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
38	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
39	# 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
40	#endif	89	#endif
41		90
42	#if __ia64	91	/*****************************************************************************/
43	# define STACKSIZE 65536	92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
44	#else	95	#else
45	# define STACKSIZE 8192	96	# define expect(expr,value) (expr)
46	#endif	97	#endif
47		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		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
48	enum {	150	enum {
49	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,
59	};	152	};
60		153
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		155
64	typedef struct aio_cb
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;
73	SV *fh, *fh2;
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;
84	mode_t mode; /* open */
85	unsigned char cancelled;
86	} aio_cb;
87
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 s_epipe respipe;
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	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
103		179
104	/* must be called at most once */	180	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
106	{	182	{
		183	if (!req->self)
		184	{
107	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		187	}
109		188
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
111	}	190	}
112		191
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	192	static aio_req SvAIO_REQ (SV *sv)
114	{	193	{
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	194	MAGIC *mg;
		195
		196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
116	croak ("object of class %s expected", klass);	200	croak ("object of class IO::AIO::REQ expected");
117		201
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		203
120	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
121	}	205	}
122		206
		207	static void aio_grp_feed (aio_req grp)
		208	{
		209	if (grp->sv2 && SvOK (grp->sv2))
		210	{
		211	dSP;
		212
		213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, aio_grp_stash));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
		222	}
		223	}
		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
		242	static int req_invoke (eio_req *req)
		243	{
		244	dSP;
		245
		246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
		250	{
		251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
		255
		256	switch (req->type)
		257	{
		258	case EIO_READDIR:
		259	{
		260	SV *rv = &PL_sv_undef;
		261
		262	if (req->result >= 0)
		263	{
		264	int i;
		265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		267	AV *av = newAV ();
		268
		269	av_extend (av, req->result - 1);
		270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
		305	names += SvCUR (name) + 1;
		306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
		310	}
		311
		312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		316	}
		317	break;
		318
		319	case EIO_OPEN:
		320	{
		321	/* convert fd to fh */
		322	SV *fh = &PL_sv_undef;
		323
		324	if (req->result >= 0)
		325	{
		326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, aio_stash, sym, symlen, 0);
		333
		334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
		346	PUSHs (fh);
		347	}
		348	break;
		349
		350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
		396
		397	default:
		398	PUSHs (sv_2mortal (newSViv (req->result)));
		399	break;
		400	}
		401
		402	errno = req->errorno;
		403
		404	PUTBACK;
		405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		406	SPAGAIN;
		407
		408	FREETMPS;
		409	LEAVE;
		410
		411	PUTBACK;
		412	}
		413
		414	return !!SvTRUE (ERRSV);
		415	}
		416
123	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
124	{	418	{
125	if (req->self)	419	if (req->self)
126	{	420	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
129	}	423	}
130		424
131	if (req->data)
132	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
145
146	if (req->type == REQ_READDIR && req->result >= 0)
147	free (req->data2ptr);
148		428
149	Safefree (req);	429	Safefree (req);
150	}	430	}
151		431
		432	static void req_cancel_subs (aio_req grp)
		433	{
		434	aio_req sub;
		435
		436	if (grp->type != EIO_GROUP)
		437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
		443	}
		444
152	static void	445	static void
153	poll_wait ()	446	create_respipe (void)
154	{	447	{
155	if (nreqs && !ress)	448	if (s_epipe_renew (&respipe))
		449	croak ("IO::AIO: unable to initialize result pipe");
		450	}
		451
		452	static void poll_wait (void)
		453	{
		454	while (eio_nreqs ())
156	{	455	{
157	fd_set rfd;	456	int size;
158	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);
160		457
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	458	X_LOCK (reslock);
		459	size = res_queue.size;
		460	X_UNLOCK (reslock);
		461
		462	if (size)
		463	return;
		464
		465	etp_maybe_start_thread ();
		466
		467	s_epipe_wait (&respipe);
162	}	468	}
163	}	469	}
164		470
165	static int	471	static int poll_cb (void)
166	poll_cb ()
167	{	472	{
168	dSP;
169	int count = 0;
170	int do_croak = 0;
171	aio_req req;
172
173	for (;;)	473	for (;;)
174	{	474	{
175	pthread_mutex_lock (&reslock);	475	int res = eio_poll ();
176	req = ress;
177		476
178	if (req)	477	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);	478	croak (0);
276	}
277	}
278		479
279	LEAVE;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
280		482
281	errno = errorno;	483	poll_wait ();
282	count++;
283	}
284
285	req_free (req);
286	}	484	}
287
288	return count;
289	}
290
291	static void *aio_proc(void *arg);
292
293	static void
294	start_thread (void)
295	{
296	sigset_t fullsigset, oldsigset;
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	}
312
313	static void
314	req_send (aio_req req)
315	{
316	while (started < wanted && nreqs >= started)
317	start_thread ();
318
319	nreqs++;
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;
507
508	#if HAVE_SENDFILE
509	# if __linux
510	res = sendfile (ofd, ifd, &offset, count);
511
512	# elif __freebsd
513	/*
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
521	if (res < 0 && sbytes)
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	}	485	}
772		486
773	static void atfork_child (void)	487	static void atfork_child (void)
774	{	488	{
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 ();	489	create_respipe ();
		490	}
800		491
801	atfork_parent ();	492	static SV *
		493	get_cb (SV *cb_sv)
		494	{
		495	SvGETMAGIC (cb_sv);
		496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
802	}	497	}
803		498
804	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
805	aio_req req; \	501	aio_req req; \
		502	int req_pri = next_pri; \
		503	next_pri = EIO_PRI_DEFAULT; \
806	\	504	\
807	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
808	croak ("callback must be undef or of reference type"); \
809	\	506	\
810	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
811	if (!req) \	508	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
813	\	510	\
814	req->callback = newSVsv (callback)	511	req->callback = SvREFCNT_inc (cb_cv); \
		512	req->pri = req_pri
815		513
816	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
817	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
818	\	518	\
819	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
820	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
821		521
822	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
823		523
824	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
825		525
826	BOOT:	526	BOOT:
827	{	527	{
		528	static const struct {
		529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
		542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		549
		550	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		551	const_eio (SYNC_FILE_RANGE_WRITE)
		552	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		553
		554	const_eio (READDIR_DENTS)
		555	const_eio (READDIR_DIRS_FIRST)
		556	const_eio (READDIR_STAT_ORDER)
		557	const_eio (READDIR_FOUND_UNKNOWN)
		558
		559	const_eio (DT_UNKNOWN)
		560	const_eio (DT_FIFO)
		561	const_eio (DT_CHR)
		562	const_eio (DT_DIR)
		563	const_eio (DT_BLK)
		564	const_eio (DT_REG)
		565	const_eio (DT_LNK)
		566	const_eio (DT_SOCK)
		567	const_eio (DT_WHT)
		568	};
		569
828	HV *stash = gv_stashpv ("IO::AIO", 1);	570	aio_stash = gv_stashpv ("IO::AIO" , 1);
829	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	571	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
830	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	572	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
831	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
832		573
		574	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		575	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		576
833	create_pipe ();	577	create_respipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}
836		578
		579	if (eio_init (want_poll, done_poll) < 0)
		580	croak ("IO::AIO: unable to initialise eio library");
		581
		582	/* atfork child called in fifo order, so before eio's handler */
		583	X_THREAD_ATFORK (0, 0, atfork_child);
		584	}
		585
837	void	586	void
838	min_parallel (nthreads)	587	max_poll_reqs (int nreqs)
839	int nthreads
840	PROTOTYPE: $	588	PROTOTYPE: $
		589	CODE:
		590	eio_set_max_poll_reqs (nreqs);
841		591
842	void	592	void
843	max_parallel (nthreads)	593	max_poll_time (double nseconds)
844	int nthreads
845	PROTOTYPE: $	594	PROTOTYPE: $
846
847	int
848	max_outstanding (nreqs)
849	int nreqs
850	PROTOTYPE: $
851	CODE:	595	CODE:
852	RETVAL = max_outstanding;	596	eio_set_max_poll_time (nseconds);
		597
		598	void
		599	min_parallel (int nthreads)
		600	PROTOTYPE: $
		601	CODE:
		602	eio_set_min_parallel (nthreads);
		603
		604	void
		605	max_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_max_parallel (nthreads);
		609
		610	void
		611	max_idle (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_idle (nthreads);
		615
		616	void
		617	max_outstanding (int maxreqs)
		618	PROTOTYPE: $
		619	CODE:
853	max_outstanding = nreqs;	620	max_outstanding = maxreqs;
854		621
855	void	622	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	623	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: $$$;$	624	PROTOTYPE: $$$;$
862	PPCODE:	625	PPCODE:
863	{	626	{
864	dREQ;	627	dREQ;
865		628
866	req->type = REQ_OPEN;	629	req->type = EIO_OPEN;
867	req->data = newSVsv (pathname);	630	req->sv1 = newSVsv (pathname);
868	req->dataptr = SvPVbyte_nolen (req->data);	631	req->ptr1 = SvPVbyte_nolen (req->sv1);
869	req->fd = flags;	632	req->int1 = flags;
870	req->mode = mode;	633	req->int2 = mode;
871		634
872	REQ_SEND;	635	REQ_SEND;
873	}	636	}
874		637
875	void	638	void
876	aio_close (fh,callback=&PL_sv_undef)	639	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
877	SV * fh
878	SV * callback
879	PROTOTYPE: $;$	640	PROTOTYPE: $;$
880	ALIAS:	641	ALIAS:
881	aio_close = REQ_CLOSE
882	aio_fsync = REQ_FSYNC	642	aio_fsync = EIO_FSYNC
883	aio_fdatasync = REQ_FDATASYNC	643	aio_fdatasync = EIO_FDATASYNC
884	PPCODE:	644	PPCODE:
885	{	645	{
		646	int fd = s_fileno_croak (fh, 0);
886	dREQ;	647	dREQ;
887		648
888	req->type = ix;	649	req->type = ix;
889	req->fh = newSVsv (fh);	650	req->sv1 = newSVsv (fh);
890	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	651	req->int1 = fd;
891		652
892	REQ_SEND (req);	653	REQ_SEND (req);
893	}	654	}
894		655
895	void	656	void
		657	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$$$;$
		659	PPCODE:
		660	{
		661	int fd = s_fileno_croak (fh, 0);
		662	dREQ;
		663
		664	req->type = EIO_SYNC_FILE_RANGE;
		665	req->sv1 = newSVsv (fh);
		666	req->int1 = fd;
		667	req->offs = offset;
		668	req->size = nbytes;
		669	req->int2 = flags;
		670
		671	REQ_SEND (req);
		672	}
		673
		674	void
		675	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		676	PROTOTYPE: $;$
		677	PPCODE:
		678	{
		679	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		680	int fd = s_fileno_croak (fh, 0);
		681	dREQ;
		682
		683	if (close_pipe < 0)
		684	{
		685	int pipefd [2];
		686
		687	if (pipe (pipefd) < 0
		688	|| close (pipefd [1]) < 0
		689	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		690	abort (); /*D*/
		691
		692	close_pipe = pipefd [0];
		693	}
		694
		695	req->type = EIO_DUP2;
		696	req->int1 = close_pipe;
		697	req->sv2 = newSVsv (fh);
		698	req->int2 = fd;
		699
		700	REQ_SEND (req);
		701	}
		702
		703	void
896	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	704	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
897	SV * fh
898	UV offset
899	UV length
900	SV * data
901	UV dataoffset
902	SV * callback
903	ALIAS:	705	ALIAS:
904	aio_read = REQ_READ	706	aio_read = EIO_READ
905	aio_write = REQ_WRITE	707	aio_write = EIO_WRITE
906	PROTOTYPE: $$$$$;$	708	PROTOTYPE: $$$$$;$
907	PPCODE:	709	PPCODE:
908	{	710	{
909	aio_req req;
910	STRLEN svlen;	711	STRLEN svlen;
		712	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
911	char *svptr = SvPVbyte (data, svlen);	713	char *svptr = SvPVbyte (data, svlen);
912		714	UV len = SvUV (length);
913	SvUPGRADE (data, SVt_PV);
914	SvPOK_on (data);
915		715
916	if (dataoffset < 0)	716	if (dataoffset < 0)
917	dataoffset += svlen;	717	dataoffset += svlen;
918		718
919	if (dataoffset < 0 || dataoffset > svlen)	719	if (dataoffset < 0 || dataoffset > svlen)
920	croak ("data offset outside of string");	720	croak ("dataoffset outside of data scalar");
921		721
922	if (ix == REQ_WRITE)	722	if (ix == EIO_WRITE)
923	{	723	{
924	/* write: check length and adjust. */	724	/* write: check length and adjust. */
925	if (length < 0 || length + dataoffset > svlen)	725	if (!SvOK (length) || len + dataoffset > svlen)
926	length = svlen - dataoffset;	726	len = svlen - dataoffset;
927	}	727	}
928	else	728	else
929	{	729	{
930	/* read: grow scalar as necessary */	730	/* read: check type and grow scalar as necessary */
		731	SvUPGRADE (data, SVt_PV);
931	svptr = SvGROW (data, length + dataoffset);	732	svptr = SvGROW (data, len + dataoffset + 1);
932	}	733	}
933
934	if (length < 0)
935	croak ("length must not be negative");
936		734
937	{	735	{
938	dREQ;	736	dREQ;
939		737
940	req->type = ix;	738	req->type = ix;
941	req->fh = newSVsv (fh);	739	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	740	req->int1 = fd;
943	: IoOFP (sv_2io (fh)));	741	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
944	req->offset = offset;	742	req->size = len;
945	req->length = length;
946	req->data = SvREFCNT_inc (data);	743	req->sv2 = SvREFCNT_inc (data);
947	req->dataptr = (char *)svptr + dataoffset;	744	req->ptr2 = (char *)svptr + dataoffset;
		745	req->stroffset = dataoffset;
948		746
949	if (!SvREADONLY (data))	747	if (!SvREADONLY (data))
950	{	748	{
951	SvREADONLY_on (data);	749	SvREADONLY_on (data);
952	req->data2ptr = (void *)data;	750	req->flags |= FLAG_SV2_RO_OFF;
953	}	751	}
954		752
955	REQ_SEND;	753	REQ_SEND;
956	}	754	}
957	}	755	}
958		756
959	void	757	void
		758	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		759	PROTOTYPE: $$;$
		760	PPCODE:
		761	{
		762	SV *data;
		763	dREQ;
		764
		765	req->type = EIO_READLINK;
		766	req->sv1 = newSVsv (path);
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768
		769	REQ_SEND;
		770	}
		771
		772	void
960	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	773	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: $$$$;$	774	PROTOTYPE: $$$$;$
967	PPCODE:	775	PPCODE:
968	{	776	{
		777	int ifd = s_fileno_croak (in_fh , 0);
		778	int ofd = s_fileno_croak (out_fh, 1);
969	dREQ;	779	dREQ;
970		780
971	req->type = REQ_SENDFILE;	781	req->type = EIO_SENDFILE;
972	req->fh = newSVsv (out_fh);	782	req->sv1 = newSVsv (out_fh);
973	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	783	req->int1 = ofd;
974	req->fh2 = newSVsv (in_fh);	784	req->sv2 = newSVsv (in_fh);
975	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	785	req->int2 = ifd;
976	req->offset = in_offset;	786	req->offs = in_offset;
977	req->length = length;	787	req->size = length;
978		788
979	REQ_SEND;	789	REQ_SEND;
980	}	790	}
981		791
982	void	792	void
983	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	793	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
984	SV * fh
985	UV offset
986	IV length
987	SV * callback
988	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
989	PPCODE:	795	PPCODE:
990	{	796	{
		797	int fd = s_fileno_croak (fh, 0);
991	dREQ;	798	dREQ;
992		799
993	req->type = REQ_READAHEAD;	800	req->type = EIO_READAHEAD;
994	req->fh = newSVsv (fh);	801	req->sv1 = newSVsv (fh);
995	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	802	req->int1 = fd;
996	req->offset = offset;	803	req->offs = offset;
997	req->length = length;	804	req->size = length;
998		805
999	REQ_SEND;	806	REQ_SEND;
1000	}	807	}
1001		808
1002	void	809	void
1003	aio_stat (fh_or_path,callback=&PL_sv_undef)	810	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1004	SV * fh_or_path
1005	SV * callback
1006	ALIAS:	811	ALIAS:
1007	aio_stat = REQ_STAT	812	aio_stat = EIO_STAT
1008	aio_lstat = REQ_LSTAT	813	aio_lstat = EIO_LSTAT
1009	PPCODE:	814	PPCODE:
1010	{	815	{
1011	dREQ;	816	dREQ;
1012		817
1013	New (0, req->statdata, 1, Stat_t);	818	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		819
1020	if (SvPOK (fh_or_path))	820	if (SvPOK (req->sv1))
1021	{	821	{
1022	req->type = ix;	822	req->type = ix;
1023	req->data = newSVsv (fh_or_path);
1024	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	}	824	}
1026	else	825	else
1027	{	826	{
1028	req->type = REQ_FSTAT;	827	req->type = EIO_FSTAT;
1029	req->fh = newSVsv (fh_or_path);
1030	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1031	}	829	}
1032		830
1033	REQ_SEND;	831	REQ_SEND;
1034	}	832	}
1035		833
1036	void	834	void
		835	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		841	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_UTIME;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FUTIME;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		860	PPCODE:
		861	{
		862	dREQ;
		863
		864	req->sv1 = newSVsv (fh_or_path);
		865	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_TRUNCATE;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FTRUNCATE;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		883	ALIAS:
		884	aio_chmod = EIO_CHMOD
		885	aio_mkdir = EIO_MKDIR
		886	PPCODE:
		887	{
		888	dREQ;
		889
		890	req->int2 = mode;
		891	req->sv1 = newSVsv (fh_or_path);
		892
		893	if (SvPOK (req->sv1))
		894	{
		895	req->type = ix;
		896	req->ptr1 = SvPVbyte_nolen (req->sv1);
		897	}
		898	else
		899	{
		900	req->type = EIO_FCHMOD;
		901	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		902	}
		903
		904	REQ_SEND;
		905	}
		906
		907	void
		908	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		914	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		915	req->sv1 = newSVsv (fh_or_path);
		916
		917	if (SvPOK (req->sv1))
		918	{
		919	req->type = EIO_CHOWN;
		920	req->ptr1 = SvPVbyte_nolen (req->sv1);
		921	}
		922	else
		923	{
		924	req->type = EIO_FCHOWN;
		925	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		926	}
		927
		928	REQ_SEND;
		929	}
		930
		931	void
		932	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		933	PPCODE:
		934	{
		935	dREQ;
		936
		937	req->type = EIO_READDIR;
		938	req->sv1 = newSVsv (pathname);
		939	req->ptr1 = SvPVbyte_nolen (req->sv1);
		940	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		941
		942	if (flags & EIO_READDIR_DENTS)
		943	req->int1 |= EIO_READDIR_CUSTOM2;
		944
		945	REQ_SEND;
		946	}
		947
		948	void
1037	aio_unlink (pathname,callback=&PL_sv_undef)	949	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1038	SV * pathname
1039	SV * callback
1040	ALIAS:	950	ALIAS:
1041	aio_unlink = REQ_UNLINK	951	aio_unlink = EIO_UNLINK
1042	aio_rmdir = REQ_RMDIR	952	aio_rmdir = EIO_RMDIR
1043	aio_readdir = REQ_READDIR	953	aio_readdir = EIO_READDIR
1044	PPCODE:	954	PPCODE:
1045	{	955	{
1046	dREQ;	956	dREQ;
1047		957
1048	req->type = ix;	958	req->type = ix;
1049	req->data = newSVsv (pathname);	959	req->sv1 = newSVsv (pathname);
1050	req->dataptr = SvPVbyte_nolen (req->data);	960	req->ptr1 = SvPVbyte_nolen (req->sv1);
		961
		962	REQ_SEND;
		963	}
		964
		965	void
		966	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		967	ALIAS:
		968	aio_link = EIO_LINK
		969	aio_symlink = EIO_SYMLINK
		970	aio_rename = EIO_RENAME
		971	PPCODE:
		972	{
		973	dREQ;
		974
		975	req->type = ix;
		976	req->sv1 = newSVsv (oldpath);
		977	req->ptr1 = SvPVbyte_nolen (req->sv1);
		978	req->sv2 = newSVsv (newpath);
		979	req->ptr2 = SvPVbyte_nolen (req->sv2);
1051		980
1052	REQ_SEND;	981	REQ_SEND;
1053	}	982	}
1054		983
1055	void	984	void
1056	aio_link (oldpath,newpath,callback=&PL_sv_undef)	985	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1057	SV * oldpath
1058	SV * newpath
1059	SV * callback
1060	ALIAS:
1061	aio_link = REQ_LINK
1062	aio_symlink = REQ_SYMLINK
1063	aio_rename = REQ_RENAME
1064	PPCODE:	986	PPCODE:
1065	{	987	{
1066	dREQ;	988	dREQ;
1067		989
1068	req->type = ix;	990	req->type = EIO_MKNOD;
1069	req->fh = newSVsv (oldpath);	991	req->sv1 = newSVsv (pathname);
1070	req->data2ptr = SvPVbyte_nolen (req->fh);	992	req->ptr1 = SvPVbyte_nolen (req->sv1);
1071	req->data = newSVsv (newpath);	993	req->int2 = (mode_t)mode;
1072	req->dataptr = SvPVbyte_nolen (req->data);	994	req->offs = dev;
1073		995
1074	REQ_SEND;	996	REQ_SEND;
1075	}	997	}
1076		998
1077	void	999	void
		1000	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1001	PPCODE:
		1002	{
		1003	dREQ;
		1004
		1005	req->type = EIO_BUSY;
		1006	req->nv1 = delay < 0. ? 0. : delay;
		1007
		1008	REQ_SEND;
		1009	}
		1010
		1011	void
1078	aio_group (callback=&PL_sv_undef)	1012	aio_group (SV *callback=&PL_sv_undef)
1079	SV * callback
1080	PROTOTYPE: ;&	1013	PROTOTYPE: ;$
1081	PPCODE:	1014	PPCODE:
1082	{	1015	{
1083	dREQ;	1016	dREQ;
		1017
1084	req->type = REQ_GROUP;	1018	req->type = EIO_GROUP;
		1019
		1020	req_submit (req);
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1021	XPUSHs (req_sv (req, aio_grp_stash));
1086	}	1022	}
		1023
		1024	void
		1025	aio_nop (SV *callback=&PL_sv_undef)
		1026	ALIAS:
		1027	aio_nop = EIO_NOP
		1028	aio_sync = EIO_SYNC
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->type = ix;
		1034
		1035	REQ_SEND;
		1036	}
		1037
		1038	int
		1039	aioreq_pri (int pri = 0)
		1040	PROTOTYPE: ;$
		1041	CODE:
		1042	RETVAL = next_pri;
		1043	if (items > 0)
		1044	{
		1045	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1046	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1047	next_pri = pri;
		1048	}
		1049	OUTPUT:
		1050	RETVAL
		1051
		1052	void
		1053	aioreq_nice (int nice = 0)
		1054	CODE:
		1055	nice = next_pri - nice;
		1056	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1057	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1058	next_pri = nice;
1087		1059
1088	void	1060	void
1089	flush ()	1061	flush ()
1090	PROTOTYPE:	1062	PROTOTYPE:
1091	CODE:	1063	CODE:
1092	while (nreqs)	1064	while (eio_nreqs ())
1093	{	1065	{
1094	poll_wait ();	1066	poll_wait ();
1095	poll_cb ();	1067	poll_cb ();
1096	}	1068	}
1097		1069
1098	void	1070	int
1099	poll()	1071	poll()
1100	PROTOTYPE:	1072	PROTOTYPE:
1101	CODE:	1073	CODE:
1102	if (nreqs)
1103	{
1104	poll_wait ();	1074	poll_wait ();
1105	poll_cb ();	1075	RETVAL = poll_cb ();
1106	}	1076	OUTPUT:
		1077	RETVAL
1107		1078
1108	int	1079	int
1109	poll_fileno()	1080	poll_fileno()
1110	PROTOTYPE:	1081	PROTOTYPE:
1111	CODE:	1082	CODE:
1112	RETVAL = respipe [0];	1083	RETVAL = s_epipe_fd (&respipe);
1113	OUTPUT:	1084	OUTPUT:
1114	RETVAL	1085	RETVAL
1115		1086
1116	int	1087	int
1117	poll_cb(...)	1088	poll_cb(...)
…		…
1123		1094
1124	void	1095	void
1125	poll_wait()	1096	poll_wait()
1126	PROTOTYPE:	1097	PROTOTYPE:
1127	CODE:	1098	CODE:
1128	if (nreqs)
1129	poll_wait ();	1099	poll_wait ();
1130		1100
1131	int	1101	int
1132	nreqs()	1102	nreqs()
1133	PROTOTYPE:	1103	PROTOTYPE:
1134	CODE:	1104	CODE:
1135	RETVAL = nreqs;	1105	RETVAL = eio_nreqs ();
1136	OUTPUT:	1106	OUTPUT:
1137	RETVAL	1107	RETVAL
1138		1108
		1109	int
		1110	nready()
		1111	PROTOTYPE:
		1112	CODE:
		1113	RETVAL = eio_nready ();
		1114	OUTPUT:
		1115	RETVAL
		1116
		1117	int
		1118	npending()
		1119	PROTOTYPE:
		1120	CODE:
		1121	RETVAL = eio_npending ();
		1122	OUTPUT:
		1123	RETVAL
		1124
		1125	int
		1126	nthreads()
		1127	PROTOTYPE:
		1128	CODE:
		1129	RETVAL = eio_nthreads ();
		1130	OUTPUT:
		1131	RETVAL
		1132
		1133	int
		1134	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1135	PROTOTYPE: $$$$
		1136	CODE:
		1137	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1138	RETVAL = posix_fadvise (fh, offset, length, advice);
		1139	#else
		1140	RETVAL = errno = ENOSYS;
		1141	#endif
		1142	OUTPUT:
		1143	RETVAL
		1144
		1145	ssize_t
		1146	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1147	PROTOTYPE: $$$$
		1148	CODE:
		1149	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1150	OUTPUT:
		1151	RETVAL
		1152
		1153	void _on_next_submit (SV *cb)
		1154	CODE:
		1155	SvREFCNT_dec (on_next_submit);
		1156	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1157
		1158	PROTOTYPES: DISABLE
		1159
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1160	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1161
1141	void	1162	void
1142	cancel (aio_req_ornot req)	1163	cancel (aio_req_ornot req)
1143	PROTOTYPE:	1164	CODE:
		1165	eio_cancel (req);
		1166
		1167	void
		1168	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1144	CODE:	1169	PPCODE:
1145	req->cancelled = 1;	1170	{
		1171	if (GIMME_V != G_VOID)
		1172	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
1146		1173
		1174	if (items > 1)
		1175	{
		1176	SV *cb_cv =get_cb (callback);
		1177
		1178	SvREFCNT_dec (req->callback);
		1179	req->callback = SvREFCNT_inc (cb_cv);
		1180	}
		1181	}
		1182
		1183	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1184
		1185	void
		1186	add (aio_req grp, ...)
		1187	PPCODE:
		1188	{
		1189	int i;
		1190
		1191	if (grp->int1 == 2)
		1192	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1193
		1194	for (i = 1; i < items; ++i )
		1195	{
		1196	aio_req req;
		1197
		1198	if (GIMME_V != G_VOID)
		1199	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1200
		1201	req = SvAIO_REQ (ST (i));
		1202
		1203	if (req)
		1204	eio_grp_add (grp, req);
		1205	}
		1206	}
		1207
		1208	void
		1209	cancel_subs (aio_req_ornot req)
		1210	CODE:
		1211	req_cancel_subs (req);
		1212
		1213	void
		1214	result (aio_req grp, ...)
		1215	CODE:
		1216	{
		1217	int i;
		1218	AV *av;
		1219
		1220	grp->errorno = errno;
		1221
		1222	av = newAV ();
		1223	av_extend (av, items - 1);
		1224
		1225	for (i = 1; i < items; ++i )
		1226	av_push (av, newSVsv (ST (i)));
		1227
		1228	SvREFCNT_dec (grp->sv1);
		1229	grp->sv1 = (SV *)av;
		1230	}
		1231
		1232	void
		1233	errno (aio_req grp, int errorno = errno)
		1234	CODE:
		1235	grp->errorno = errorno;
		1236
		1237	void
		1238	limit (aio_req grp, int limit)
		1239	CODE:
		1240	eio_grp_limit (grp, limit);
		1241
		1242	void
		1243	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1244	CODE:
		1245	{
		1246	SvREFCNT_dec (grp->sv2);
		1247	grp->sv2 = newSVsv (callback);
		1248	grp->feed = aio_grp_feed;
		1249
		1250	if (grp->int2 <= 0)
		1251	grp->int2 = 2;
		1252
		1253	eio_grp_limit (grp, grp->int2);
		1254	}
		1255

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