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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 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
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14
15	#include <unistd.h>	16	#include <limits.h>
16	#include <fcntl.h>	17	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	18	#include <sched.h>
19		19
20	#if HAVE_SENDFILE	20	/* perl namespace pollution */
21	# if __linux	21	#undef VERSION
22	# include <sys/sendfile.h>	22
23	# elif __freebsd	23	#ifdef _WIN32
24	# include <sys/socket.h>	24
25	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
26	# elif __hpux	26	# undef malloc
27	# include <sys/socket.h>	27	# undef free
		28
		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
28	# else	61	#else
29	# error sendfile support requested but not available	62
30	# 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
31	#endif	70	#endif
32		71
33	#if __ia64	72	/* perl stupidly overrides readdir and maybe others */
34	# define STACKSIZE 65536	73	/* with thread-unsafe versions, imagine that :( */
		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
35	#else	85	#else
36	# define STACKSIZE 4096	86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
37	#endif	89	#endif
38		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		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
39	enum {	152	enum {
40	REQ_QUIT,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
41	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,
43	REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
45	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,
47	REQ_SYMLINK,
48	};	154	};
49		155
50	typedef struct aio_cb {	156	#include "libeio/eio.c"
51	struct aio_cb *volatile next;
52		157
53	int type;
54
55	int fd, fd2;
56	off_t offset;
57	size_t length;
58	ssize_t result;
59	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65
66	Stat_t *statdata;
67	} aio_cb;
68
69	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
		159	typedef eio_req *aio_req_ornot;
70		160
71	static int started, wanted;	161	static SV *on_next_submit;
72	static volatile int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
73	static int max_outstanding = 1<<30;	163	static int max_outstanding;
74	static int respipe [2];
75		164
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	165	static s_epipe respipe;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79		166
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	167	static void req_destroy (aio_req req);
81	static volatile aio_req ress, rese; /* queue start, queue end */
82
83	static void free_req (aio_req req)	168	static void req_cancel (aio_req req);
84	{
85	if (req->data)
86	SvREFCNT_dec (req->data);
87		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	{
88	if (req->fh)	418	if (req->self)
		419	{
		420	sv_unmagic (req->self, PERL_MAGIC_ext);
89	SvREFCNT_dec (req->fh);	421	SvREFCNT_dec (req->self);
		422	}
90		423
91	if (req->fh2)	424	SvREFCNT_dec (req->sv1);
92	SvREFCNT_dec (req->fh2);	425	SvREFCNT_dec (req->sv2);
93
94	if (req->statdata)
95	Safefree (req->statdata);
96
97	if (req->callback)
98	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
99		427
100	Safefree (req);	428	Safefree (req);
101	}	429	}
102		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
103	static void	444	static void
104	poll_wait ()	445	create_respipe (void)
105	{	446	{
106	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 ())
107	{	454	{
108	fd_set rfd;	455	int size;
109	FD_ZERO(&rfd);
110	FD_SET(respipe [0], &rfd);
111		456
112	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);
113	}	467	}
114	}	468	}
115		469
116	static int	470	static int poll_cb (void)
117	poll_cb ()
118	{	471	{
119	dSP;
120	int count = 0;
121	int do_croak = 0;
122	aio_req req;
123
124	for (;;)	472	for (;;)
125	{	473	{
126	pthread_mutex_lock (&reslock);	474	int res = eio_poll ();
127	req = ress;
128		475
129	if (req)	476	if (res > 0)
130	{
131	ress = req->next;
132
133	if (!ress)
134	{
135	/* read any signals sent by the worker threads */
136	char buf [32];
137	while (read (respipe [0], buf, 32) == 32)
138	;
139
140	rese = 0;
141	}
142	}
143
144	pthread_mutex_unlock (&reslock);
145
146	if (!req)
147	break;
148
149	nreqs--;
150
151	if (req->type == REQ_QUIT)
152	started--;
153	else
154	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);
163
164	if (req->statdata)
165	{
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);
169	}
170
171	ENTER;
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174
175	if (req->type == REQ_OPEN)
176	{
177	/* convert fd to fh */
178	SV *fh;
179
180	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
182	SPAGAIN;
183
184	fh = SvREFCNT_inc (POPs);
185
186	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));
188	}
189
190	if (SvOK (req->callback))
191	{
192	PUTBACK;
193	call_sv (req->callback, G_VOID | G_EVAL);
194	SPAGAIN;
195
196	if (SvTRUE (ERRSV))
197	{
198	free_req (req);
199	croak (0);	477	croak (0);
200	}
201	}
202		478
203	LEAVE;	479	if (!max_outstanding || max_outstanding > eio_nreqs ())
		480	return res;
204		481
205	errno = errorno;	482	poll_wait ();
206	count++;
207	}
208
209	free_req (req);
210	}	483	}
211
212	return count;
213	}
214
215	static void *aio_proc(void *arg);
216
217	static void
218	start_thread (void)
219	{
220	sigset_t fullsigset, oldsigset;
221	pthread_t tid;
222	pthread_attr_t attr;
223
224	pthread_attr_init (&attr);
225	pthread_attr_setstacksize (&attr, STACKSIZE);
226	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227
228	sigfillset (&fullsigset);
229	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230
231	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
232	started++;
233
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}
236
237	static void
238	send_req (aio_req req)
239	{
240	while (started < wanted && nreqs >= started)
241	start_thread ();
242
243	nreqs++;
244
245	pthread_mutex_lock (&reqlock);
246
247	req->next = 0;
248
249	if (reqe)
250	{
251	reqe->next = req;
252	reqe = req;
253	}
254	else
255	reqe = reqs = req;
256
257	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);
259
260	if (nreqs > max_outstanding)
261	for (;;)
262	{
263	poll_cb ();
264
265	if (nreqs <= max_outstanding)
266	break;
267
268	poll_wait ();
269	}
270	}
271
272	static void
273	end_thread (void)
274	{
275	aio_req req;
276	Newz (0, req, 1, aio_cb);
277	req->type = REQ_QUIT;
278
279	send_req (req);
280	}
281
282	static void min_parallel (int nthreads)
283	{
284	if (wanted < nthreads)
285	wanted = nthreads;
286	}
287
288	static void max_parallel (int nthreads)
289	{
290	int cur = started;
291
292	if (wanted > nthreads)
293	wanted = nthreads;
294
295	while (cur > wanted)
296	{
297	end_thread ();
298	cur--;
299	}
300
301	while (started > wanted)
302	{
303	poll_wait ();
304	poll_cb ();
305	}
306	}
307
308	static void create_pipe ()
309	{
310	if (pipe (respipe))
311	croak ("unable to initialize result pipe");
312
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");
315
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}	484	}
331		485
332	static void atfork_child (void)	486	static void atfork_child (void)
333	{	487	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();	488	create_respipe ();
359
360	atfork_parent ();
361	}	489	}
362		490
363	/*****************************************************************************/	491	static SV *
364	/* work around various missing functions */	492	get_cb (SV *cb_sv)
365
366	#if !HAVE_PREADWRITE
367	# define pread aio_pread
368	# define pwrite aio_pwrite
369
370	/*
371	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.
374	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
376
377	static ssize_t
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{	493	{
380	ssize_t res;	494	SvGETMAGIC (cb_sv);
381	off_t ooffset;	495	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
382
383	pthread_mutex_lock (&iolock);
384	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);
389
390	return res;
391	}	496	}
392		497
393	static ssize_t	498	#define dREQ \
394	pwrite (int fd, void *buf, size_t count, off_t offset)	499	SV *cb_cv; \
395	{	500	aio_req req; \
396	ssize_t res;	501	int req_pri = next_pri; \
397	off_t ooffset;	502	next_pri = EIO_PRI_DEFAULT; \
		503	\
		504	cb_cv = get_cb (callback); \
		505	\
		506	Newz (0, req, 1, eio_req); \
		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
398		512
399	pthread_mutex_lock (&iolock);	513	#define REQ_SEND \
400	ooffset = lseek (fd, 0, SEEK_CUR);	514	PUTBACK; \
401	lseek (fd, offset, SEEK_SET);	515	req_submit (req); \
402	res = write (fd, buf, count);	516	SPAGAIN; \
403	lseek (fd, offset, SEEK_SET);	517	\
404	pthread_mutex_unlock (&iolock);	518	if (GIMME_V != G_VOID) \
		519	XPUSHs (req_sv (req, AIO_REQ_KLASS));
405		520
406	return res;	521	MODULE = IO::AIO PACKAGE = IO::AIO
407	}	522
		523	PROTOTYPES: ENABLE
		524
		525	BOOT:
		526	{
		527	static const struct {
		528	const char *name;
		529	IV iv;
		530	} *civ, const_iv[] = {
		531	# define const_iv(name, value) { # name, (IV) value },
		532	# define const_eio(name) { # name, (IV) EIO_ ## name },
		533	const_iv (EXDEV , EXDEV)
		534	const_iv (ENOSYS , ENOSYS)
		535	const_iv (O_RDONLY, O_RDONLY)
		536	const_iv (O_WRONLY, O_WRONLY)
		537	const_iv (O_CREAT , O_CREAT)
		538	const_iv (O_TRUNC , O_TRUNC)
		539	#ifndef _WIN32
		540	const_iv (S_IFIFO , S_IFIFO)
408	#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)
409		548
410	#if !HAVE_FDATASYNC	549	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
411	# define fdatasync fsync	550	const_eio (SYNC_FILE_RANGE_WRITE)
412	#endif	551	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
413		552
414	#if !HAVE_READAHEAD	553	const_eio (READDIR_DENTS)
415	# define readahead aio_readahead	554	const_eio (READDIR_DIRS_FIRST)
		555	const_eio (READDIR_STAT_ORDER)
		556	const_eio (READDIR_FOUND_UNKNOWN)
416		557
417	static char readahead_buf[4096];	558	const_eio (DT_UNKNOWN)
418		559	const_eio (DT_FIFO)
419	static ssize_t	560	const_eio (DT_CHR)
420	readahead (int fd, off_t offset, size_t count)	561	const_eio (DT_DIR)
421	{	562	const_eio (DT_BLK)
422	while (count > 0)	563	const_eio (DT_REG)
423	{	564	const_eio (DT_LNK)
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	565	const_eio (DT_SOCK)
425		566	const_eio (DT_WHT)
426	pread (fd, readahead_buf, len, offset);
427	offset += len;
428	count -= len;
429	}
430
431	errno = 0;
432	}
433	#endif
434
435	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
438	{
439	ssize_t res;
440
441	if (!count)
442	return 0;
443
444	#if __linux
445	res = sendfile (ofd, ifd, &offset, count);
446
447	#elif __freebsd
448	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.
451	*/
452	{
453	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455
456	if (!res && errno == EAGAIN)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */
458	res = sbytes;
459	}	567	};
460		568
461	#elif __hpux	569	stash = gv_stashpv ("IO::AIO", 1);
462	res = sendfile (ofd, ifd, offset, count, 0, 0);
463		570
464	#else	571	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
465	res = -1;	572	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
466	errno = ENOSYS;
467	#endif
468		573
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
470	{
471	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);
473	res = 0;
474
475	for (;;)
476	{
477	ssize_t cnt;
478
479	cnt = pread (ifd, buf, 4096, offset);
480
481	if (cnt <= 0)
482	{
483	if (cnt && !res) res = -1;
484	break;
485	}
486
487	cnt = write (ofd, buf, cnt);
488
489	if (cnt <= 0)
490	{
491	if (cnt && !res) res = -1;
492	break;
493	}
494
495	offset += cnt;
496	res += cnt;
497	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}
505
506	return res;
507	}
508
509	/*****************************************************************************/
510
511	static void *
512	aio_proc (void *thr_arg)
513	{
514	aio_req req;
515	int type;
516
517	do
518	{
519	pthread_mutex_lock (&reqlock);
520
521	for (;;)
522	{
523	req = reqs;
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530
531	if (req)
532	break;
533
534	pthread_cond_wait (&reqwait, &reqlock);
535	}
536
537	pthread_mutex_unlock (&reqlock);
538
539	errno = 0; /* strictly unnecessary */
540
541	type = req->type;
542
543	switch (type)
544	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
546	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
549	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
550
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;
563
564	case REQ_QUIT:
565	break;
566
567	default:
568	req->result = ENOSYS;
569	break;
570	}
571
572	req->errorno = errno;
573
574	pthread_mutex_lock (&reslock);
575
576	req->next = 0;
577
578	if (rese)
579	{
580	rese->next = req;
581	rese = req;
582	}
583	else
584	{
585	rese = ress = req;
586
587	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);
589	}
590
591	pthread_mutex_unlock (&reslock);
592	}
593	while (type != REQ_QUIT);
594
595	return 0;
596	}
597
598	#define dREQ \
599	aio_req req; \
600	\
601	if (SvOK (callback) && !SvROK (callback)) \
602	croak ("clalback must be undef or of reference type"); \
603	\
604	Newz (0, req, 1, aio_cb); \
605	if (!req) \
606	croak ("out of memory during aio_req allocation"); \
607	\
608	req->callback = newSVsv (callback);
609
610	MODULE = IO::AIO PACKAGE = IO::AIO
611
612	PROTOTYPES: ENABLE
613
614	BOOT:
615	{
616	create_pipe ();	574	create_respipe ();
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
618	}
619		575
		576	if (eio_init (want_poll, done_poll) < 0)
		577	croak ("IO::AIO: unable to initialise eio library");
		578
		579	/* atfork child called in fifo order, so before eio's handler */
		580	X_THREAD_ATFORK (0, 0, atfork_child);
		581	}
		582
620	void	583	void
621	min_parallel(nthreads)	584	max_poll_reqs (int nreqs)
622	int nthreads
623	PROTOTYPE: $	585	PROTOTYPE: $
		586	CODE:
		587	eio_set_max_poll_reqs (nreqs);
624		588
625	void	589	void
626	max_parallel(nthreads)	590	max_poll_time (double nseconds)
627	int nthreads
628	PROTOTYPE: $	591	PROTOTYPE: $
629
630	int
631	max_outstanding(nreqs)
632	int nreqs
633	PROTOTYPE: $
634	CODE:	592	CODE:
635	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:
636	max_outstanding = nreqs;	617	max_outstanding = maxreqs;
637		618
638	void	619	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	620	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
640	SV * pathname
641	int flags
642	int mode
643	SV * callback
644	PROTOTYPE: $$$;$	621	PROTOTYPE: $$$;$
645	CODE:	622	PPCODE:
646	{	623	{
647	dREQ;	624	dREQ;
648		625
649	req->type = REQ_OPEN;	626	req->type = EIO_OPEN;
650	req->data = newSVsv (pathname);	627	req->sv1 = newSVsv (pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);	628	req->ptr1 = SvPVbyte_nolen (req->sv1);
652	req->fd = flags;	629	req->int1 = flags;
653	req->mode = mode;	630	req->int2 = mode;
654		631
655	send_req (req);	632	REQ_SEND;
656	}	633	}
657		634
658	void	635	void
659	aio_close(fh,callback=&PL_sv_undef)	636	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
660	SV * fh
661	SV * callback
662	PROTOTYPE: $;$	637	PROTOTYPE: $;$
663	ALIAS:	638	ALIAS:
664	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	639	aio_fsync = EIO_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	640	aio_fdatasync = EIO_FDATASYNC
667	CODE:	641	PPCODE:
668	{	642	{
		643	int fd = s_fileno_croak (fh, 0);
669	dREQ;	644	dREQ;
670		645
671	req->type = ix;	646	req->type = ix;
672	req->fh = newSVsv (fh);	647	req->sv1 = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	648	req->int1 = fd;
674		649
675	send_req (req);	650	REQ_SEND (req);
676	}	651	}
677		652
678	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: $$$$;$
		656	PPCODE:
		657	{
		658	int fd = s_fileno_croak (fh, 0);
		659	dREQ;
		660
		661	req->type = EIO_SYNC_FILE_RANGE;
		662	req->sv1 = newSVsv (fh);
		663	req->int1 = fd;
		664	req->offs = offset;
		665	req->size = nbytes;
		666	req->int2 = flags;
		667
		668	REQ_SEND (req);
		669	}
		670
		671	void
		672	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $;$
		674	PPCODE:
		675	{
		676	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		677	int fd = s_fileno_croak (fh, 0);
		678	dREQ;
		679
		680	if (close_pipe < 0)
		681	{
		682	int pipefd [2];
		683
		684	if (pipe (pipefd) < 0
		685	|| close (pipefd [1]) < 0
		686	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		687	abort (); /*D*/
		688
		689	close_pipe = pipefd [0];
		690	}
		691
		692	req->type = EIO_DUP2;
		693	req->int1 = close_pipe;
		694	req->sv2 = newSVsv (fh);
		695	req->int2 = fd;
		696
		697	REQ_SEND (req);
		698	}
		699
		700	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	701	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
680	SV * fh
681	UV offset
682	UV length
683	SV * data
684	UV dataoffset
685	SV * callback
686	ALIAS:	702	ALIAS:
687	aio_read = REQ_READ	703	aio_read = EIO_READ
688	aio_write = REQ_WRITE	704	aio_write = EIO_WRITE
689	PROTOTYPE: $$$$$;$	705	PROTOTYPE: $$$$$;$
690	CODE:	706	PPCODE:
691	{	707	{
692	aio_req req;
693	STRLEN svlen;	708	STRLEN svlen;
		709	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
694	char *svptr = SvPVbyte (data, svlen);	710	char *svptr = SvPVbyte (data, svlen);
695		711	UV len = SvUV (length);
696	SvUPGRADE (data, SVt_PV);
697	SvPOK_on (data);
698		712
699	if (dataoffset < 0)	713	if (dataoffset < 0)
700	dataoffset += svlen;	714	dataoffset += svlen;
701		715
702	if (dataoffset < 0 || dataoffset > svlen)	716	if (dataoffset < 0 || dataoffset > svlen)
703	croak ("data offset outside of string");	717	croak ("dataoffset outside of data scalar");
704		718
705	if (ix == REQ_WRITE)	719	if (ix == EIO_WRITE)
706	{	720	{
707	/* write: check length and adjust. */	721	/* write: check length and adjust. */
708	if (length < 0 || length + dataoffset > svlen)	722	if (!SvOK (length) || len + dataoffset > svlen)
709	length = svlen - dataoffset;	723	len = svlen - dataoffset;
710	}	724	}
711	else	725	else
712	{	726	{
713	/* read: grow scalar as necessary */	727	/* read: check type and grow scalar as necessary */
		728	SvUPGRADE (data, SVt_PV);
714	svptr = SvGROW (data, length + dataoffset);	729	svptr = SvGROW (data, len + dataoffset + 1);
715	}	730	}
716
717	if (length < 0)
718	croak ("length must not be negative");
719		731
720	{	732	{
721	dREQ;	733	dREQ;
722		734
723	req->type = ix;	735	req->type = ix;
724	req->fh = newSVsv (fh);	736	req->sv1 = newSVsv (fh);
725	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	737	req->int1 = fd;
726	: IoOFP (sv_2io (fh)));	738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
727	req->offset = offset;	739	req->size = len;
728	req->length = length;
729	req->data = SvREFCNT_inc (data);	740	req->sv2 = SvREFCNT_inc (data);
730	req->dataptr = (char *)svptr + dataoffset;	741	req->ptr2 = (char *)svptr + dataoffset;
		742	req->stroffset = dataoffset;
731		743
732	if (!SvREADONLY (data))	744	if (!SvREADONLY (data))
733	{	745	{
734	SvREADONLY_on (data);	746	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	747	req->flags |= FLAG_SV2_RO_OFF;
736	}	748	}
737		749
738	send_req (req);	750	REQ_SEND;
739	}	751	}
740	}	752	}
741		753
742	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
743	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)
744	SV * out_fh
745	SV * in_fh
746	UV in_offset
747	UV length
748	SV * callback
749	PROTOTYPE: $$$$;$	771	PROTOTYPE: $$$$;$
750	CODE:	772	PPCODE:
751	{	773	{
		774	int ifd = s_fileno_croak (in_fh , 0);
		775	int ofd = s_fileno_croak (out_fh, 1);
752	dREQ;	776	dREQ;
753		777
754	req->type = REQ_SENDFILE;	778	req->type = EIO_SENDFILE;
755	req->fh = newSVsv (out_fh);	779	req->sv1 = newSVsv (out_fh);
756	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	780	req->int1 = ofd;
757	req->fh2 = newSVsv (in_fh);	781	req->sv2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	782	req->int2 = ifd;
759	req->offset = in_offset;	783	req->offs = in_offset;
760	req->length = length;	784	req->size = length;
761		785
762	send_req (req);	786	REQ_SEND;
763	}	787	}
764		788
765	void	789	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	790	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
767	SV * fh
768	UV offset
769	IV length
770	SV * callback
771	PROTOTYPE: $$$;$	791	PROTOTYPE: $$$;$
772	CODE:	792	PPCODE:
773	{	793	{
		794	int fd = s_fileno_croak (fh, 0);
774	dREQ;	795	dREQ;
775		796
776	req->type = REQ_READAHEAD;	797	req->type = EIO_READAHEAD;
777	req->fh = newSVsv (fh);	798	req->sv1 = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	799	req->int1 = fd;
779	req->offset = offset;	800	req->offs = offset;
780	req->length = length;	801	req->size = length;
781		802
782	send_req (req);	803	REQ_SEND;
783	}	804	}
784		805
785	void	806	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	807	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
787	SV * fh_or_path
788	SV * callback
789	ALIAS:	808	ALIAS:
790	aio_stat = REQ_STAT	809	aio_stat = EIO_STAT
791	aio_lstat = REQ_LSTAT	810	aio_lstat = EIO_LSTAT
792	CODE:	811	PPCODE:
793	{	812	{
794	dREQ;	813	dREQ;
795		814
796	New (0, req->statdata, 1, Stat_t);	815	req->sv1 = newSVsv (fh_or_path);
797	if (!req->statdata)
798	{
799	free_req (req);
800	croak ("out of memory during aio_req->statdata allocation");
801	}
802		816
803	if (SvPOK (fh_or_path))	817	if (SvPOK (req->sv1))
804	{	818	{
805	req->type = ix;	819	req->type = ix;
806	req->data = newSVsv (fh_or_path);
807	req->dataptr = SvPVbyte_nolen (req->data);	820	req->ptr1 = SvPVbyte_nolen (req->sv1);
808	}	821	}
809	else	822	else
810	{	823	{
811	req->type = REQ_FSTAT;	824	req->type = EIO_FSTAT;
812	req->fh = newSVsv (fh_or_path);
813	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))
814	}	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	}
815		851
816	send_req (req);	852	REQ_SEND;
817	}	853	}
818		854
819	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
820	aio_unlink(pathname,callback=&PL_sv_undef)	946	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
821	SV * pathname
822	SV * callback
823	ALIAS:	947	ALIAS:
824	aio_unlink = REQ_UNLINK	948	aio_unlink = EIO_UNLINK
825	aio_rmdir = REQ_RMDIR	949	aio_rmdir = EIO_RMDIR
		950	aio_readdir = EIO_READDIR
826	CODE:	951	PPCODE:
827	{	952	{
828	dREQ;	953	dREQ;
829		954
830	req->type = ix;	955	req->type = ix;
831	req->data = newSVsv (pathname);	956	req->sv1 = newSVsv (pathname);
832	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;
833		971
834	send_req (req);	972	req->type = ix;
835	}	973	req->sv1 = newSVsv (oldpath);
836		974	req->ptr1 = SvPVbyte_nolen (req->sv1);
837	void	975	req->sv2 = newSVsv (newpath);
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	976	req->ptr2 = SvPVbyte_nolen (req->sv2);
839	SV * oldpath
840	SV * newpath
841	SV * callback
842	CODE:
843	{
844	dREQ;
845		977
846	req->type = REQ_SYMLINK;	978	REQ_SEND;
847	req->fh = newSVsv (oldpath);	979	}
848	req->data2ptr = SvPVbyte_nolen (req->fh);	980
849	req->data = newSVsv (newpath);	981	void
850	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;
851		986
852	send_req (req);	987	req->type = EIO_MKNOD;
		988	req->sv1 = newSVsv (pathname);
		989	req->ptr1 = SvPVbyte_nolen (req->sv1);
		990	req->int2 = (mode_t)mode;
		991	req->offs = dev;
		992
		993	REQ_SEND;
853	}	994	}
854		995
855	void	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
		1030	req->type = ix;
		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
		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
856	flush()	1058	flush ()
857	PROTOTYPE:	1059	PROTOTYPE:
858	CODE:	1060	CODE:
859	while (nreqs)	1061	while (eio_nreqs ())
860	{	1062	{
861	poll_wait ();	1063	poll_wait ();
862	poll_cb ();	1064	poll_cb ();
863	}	1065	}
864		1066
865	void	1067	int
866	poll()	1068	poll()
867	PROTOTYPE:	1069	PROTOTYPE:
868	CODE:	1070	CODE:
869	if (nreqs)
870	{
871	poll_wait ();	1071	poll_wait ();
872	poll_cb ();	1072	RETVAL = poll_cb ();
873	}	1073	OUTPUT:
		1074	RETVAL
874		1075
875	int	1076	int
876	poll_fileno()	1077	poll_fileno()
877	PROTOTYPE:	1078	PROTOTYPE:
878	CODE:	1079	CODE:
879	RETVAL = respipe [0];	1080	RETVAL = s_epipe_fd (&respipe);
880	OUTPUT:	1081	OUTPUT:
881	RETVAL	1082	RETVAL
882		1083
883	int	1084	int
884	poll_cb(...)	1085	poll_cb(...)
…		…
890		1091
891	void	1092	void
892	poll_wait()	1093	poll_wait()
893	PROTOTYPE:	1094	PROTOTYPE:
894	CODE:	1095	CODE:
895	if (nreqs)
896	poll_wait ();	1096	poll_wait ();
897		1097
898	int	1098	int
899	nreqs()	1099	nreqs()
900	PROTOTYPE:	1100	PROTOTYPE:
901	CODE:	1101	CODE:
902	RETVAL = nreqs;	1102	RETVAL = eio_nreqs ();
903	OUTPUT:	1103	OUTPUT:
904	RETVAL	1104	RETVAL
905		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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