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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.29 by root, Wed Aug 17 06:12:10 2005 UTC vs.
Revision 1.153 by root, Wed Jul 15 01:36:04 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
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12
13	#include <unistd.h>	16	#include <limits.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	18	#include <sched.h>
17		19
18	#include <pthread.h>	20	/* perl namespace pollution */
		21	#undef VERSION
19		22
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	23	#ifdef _WIN32
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		24
24	#if __ia64	25	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	26	# undef malloc
		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
26	#else	61	#else
27	# define STACKSIZE 4096	62
		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
28	#endif	70	#endif
29		71
		72	/* perl stupidly overrides readdir and maybe others */
		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
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
		89	#endif
		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
30	enum {	152	enum {
31	REQ_QUIT,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	154	};
39		155
40	typedef struct aio_cb {	156	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		157
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
		159	typedef eio_req *aio_req_ornot;
59		160
60	static int started;	161	static SV *on_next_submit;
61	static volatile int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	163	static int max_outstanding;
		164
63	static int respipe [2];	165	static int respipe_osf [2];
		166	static s_epipe respipe;
64		167
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	168	static void req_destroy (aio_req req);
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68
69	static volatile aio_req reqs, reqe; /* queue start, queue end */
70	static volatile aio_req ress, rese; /* queue start, queue end */
71
72	static void free_req (aio_req req)	169	static void req_cancel (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		170
		171	static void want_poll (void)
		172	{
		173	/* write a dummy byte to the pipe so fh becomes ready */
		174	s_epipe_signal (&respipe);
		175	}
		176
		177	static void done_poll (void)
		178	{
		179	/* read any signals sent by the worker threads */
		180	s_epipe_drain (&respipe);
		181	}
		182
		183	/* must be called at most once */
		184	static SV *req_sv (aio_req req, const char *klass)
		185	{
		186	if (!req->self)
		187	{
		188	req->self = (SV *)newHV ();
		189	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		190	}
		191
		192	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		193	}
		194
		195	static aio_req SvAIO_REQ (SV *sv)
		196	{
		197	MAGIC *mg;
		198
		199	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		200	croak ("object of class " AIO_REQ_KLASS " expected");
		201
		202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		203
		204	return mg ? (aio_req)mg->mg_ptr : 0;
		205	}
		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_KLASS));
		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, 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
		417	static void req_destroy (aio_req req)
		418	{
77	if (req->fh)	419	if (req->self)
		420	{
		421	sv_unmagic (req->self, PERL_MAGIC_ext);
78	SvREFCNT_dec (req->fh);	422	SvREFCNT_dec (req->self);
		423	}
79		424
80	if (req->statdata)	425	SvREFCNT_dec (req->sv1);
81	Safefree (req->statdata);	426	SvREFCNT_dec (req->sv2);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
85		428
86	Safefree (req);	429	Safefree (req);
87	}	430	}
88		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
89	static void	445	static void
90	poll_wait ()	446	create_respipe (void)
91	{	447	{
92	if (nreqs && !ress)	448	if (s_epipe_renew (&respipe))
		449	croak ("unable to initialize result pipe");
		450
		451	respipe_osf [0] = S_TO_SOCKET (respipe.fd [0]);
		452	respipe_osf [1] = S_TO_SOCKET (respipe.fd [1]);
		453	}
		454
		455	static void poll_wait (void)
		456	{
		457	while (eio_nreqs ())
93	{	458	{
94	fd_set rfd;	459	int size;
95	FD_ZERO(&rfd);
96	FD_SET(respipe [0], &rfd);
97		460
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	461	X_LOCK (reslock);
		462	size = res_queue.size;
		463	X_UNLOCK (reslock);
		464
		465	if (size)
		466	return;
		467
		468	etp_maybe_start_thread ();
		469
		470	s_epipe_wait (&respipe);
99	}	471	}
100	}	472	}
101		473
102	static int	474	static int poll_cb (void)
103	poll_cb ()
104	{	475	{
105	dSP;
106	int count = 0;
107	int do_croak = 0;
108	aio_req req;
109
110	for (;;)	476	for (;;)
111	{	477	{
112	pthread_mutex_lock (&reslock);	478	int res = eio_poll ();
113	req = ress;
114		479
115	if (req)	480	if (res > 0)
116	{
117	ress = req->next;
118
119	if (!ress)
120	{
121	rese = 0;
122
123	/* read any signals sent by the worker threads */
124	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)
126	;
127	}
128	}
129
130	pthread_mutex_unlock (&reslock);
131
132	if (!req)
133	break;
134
135	nreqs--;
136
137	if (req->type == REQ_QUIT)
138	started--;
139	else
140	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);
149
150	if (req->statdata)
151	{
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);
155	}
156
157	ENTER;
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID | G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);	481	croak (0);
186	}
187	}
188		482
189	LEAVE;	483	if (!max_outstanding || max_outstanding > eio_nreqs ())
		484	return res;
190		485
191	errno = errorno;	486	poll_wait ();
192	count++;
193	}
194
195	free_req (req);
196	}	487	}
197
198	return count;
199	}
200
201	static void *aio_proc(void *arg);
202
203	static void
204	start_thread (void)
205	{
206	sigset_t fullsigset, oldsigset;
207	pthread_t tid;
208	pthread_attr_t attr;
209
210	pthread_attr_init (&attr);
211	pthread_attr_setstacksize (&attr, STACKSIZE);
212	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
213
214	sigfillset (&fullsigset);
215	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
216
217	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
218	started++;
219
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);
221	}
222
223	static void
224	send_req (aio_req req)
225	{
226	nreqs++;
227
228	pthread_mutex_lock (&reqlock);
229
230	req->next = 0;
231
232	if (reqe)
233	{
234	reqe->next = req;
235	reqe = req;
236	}
237	else
238	reqe = reqs = req;
239
240	pthread_cond_signal (&reqwait);
241	pthread_mutex_unlock (&reqlock);
242
243	if (nreqs > max_outstanding)
244	for (;;)
245	{
246	poll_cb ();
247
248	if (nreqs <= max_outstanding)
249	break;
250
251	poll_wait ();
252	}
253	}
254
255	static void
256	end_thread (void)
257	{
258	aio_req req;
259	Newz (0, req, 1, aio_cb);
260	req->type = REQ_QUIT;
261
262	send_req (req);
263	}
264
265	static void min_parallel (int nthreads)
266	{
267	while (nthreads > started)
268	start_thread ();
269	}
270
271	static void max_parallel (int nthreads)
272	{
273	int cur = started;
274
275	while (cur > nthreads)
276	{
277	end_thread ();
278	cur--;
279	}
280
281	while (started > nthreads)
282	{
283	poll_wait ();
284	poll_cb ();
285	}
286	}
287
288	static void create_pipe ()
289	{
290	if (pipe (respipe))
291	croak ("unable to initialize result pipe");
292
293	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295
296	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
297	croak ("cannot set result pipe to nonblocking mode");
298	}
299
300	static void atfork_prepare (void)
301	{
302	pthread_mutex_lock (&reqlock);
303	pthread_mutex_lock (&reslock);
304	}
305
306	static void atfork_parent (void)
307	{
308	pthread_mutex_unlock (&reslock);
309	pthread_mutex_unlock (&reqlock);
310	}	488	}
311		489
312	static void atfork_child (void)	490	static void atfork_child (void)
313	{	491	{
314	aio_req prv;
315
316	int restart = started;
317	started = 0;
318
319	while (reqs)
320	{
321	prv = reqs;
322	reqs = prv->next;
323	free_req (prv);
324	}
325
326	reqs = reqe = 0;
327
328	while (ress)
329	{
330	prv = ress;
331	ress = prv->next;
332	free_req (prv);
333	}
334
335	ress = rese = 0;
336
337	close (respipe [0]);
338	close (respipe [1]);
339	create_pipe ();	492	create_respipe ();
340
341	atfork_parent ();
342
343	min_parallel (restart);
344	}	493	}
345		494
346	/*****************************************************************************/	495	static SV *
347	/* work around various missing functions */	496	get_cb (SV *cb_sv)
348
349	#if !HAVE_PREADWRITE
350	# define pread aio_pread
351	# define pwrite aio_pwrite
352
353	/*
354	* make our pread/pwrite safe against themselves, but not against
355	* normal read/write by using a mutex. slows down execution a lot,
356	* but that's your problem, not mine.
357	*/
358	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
359
360	static ssize_t
361	pread (int fd, void *buf, size_t count, off_t offset)
362	{	497	{
363	ssize_t res;	498	SvGETMAGIC (cb_sv);
364	off_t ooffset;	499	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
365
366	pthread_mutex_lock (&iolock);
367	ooffset = lseek (fd, 0, SEEK_CUR);
368	lseek (fd, offset, SEEK_SET);
369	res = read (fd, buf, count);
370	lseek (fd, ooffset, SEEK_SET);
371	pthread_mutex_unlock (&iolock);
372
373	return res;
374	}	500	}
375		501
376	static ssize_t	502	#define dREQ \
377	pwrite (int fd, void *buf, size_t count, off_t offset)	503	SV *cb_cv; \
378	{	504	aio_req req; \
379	ssize_t res;	505	int req_pri = next_pri; \
380	off_t ooffset;	506	next_pri = EIO_PRI_DEFAULT; \
		507	\
		508	cb_cv = get_cb (callback); \
		509	\
		510	Newz (0, req, 1, eio_req); \
		511	if (!req) \
		512	croak ("out of memory during eio_req allocation"); \
		513	\
		514	req->callback = SvREFCNT_inc (cb_cv); \
		515	req->pri = req_pri
381		516
382	pthread_mutex_lock (&iolock);	517	#define REQ_SEND \
383	ooffset = lseek (fd, 0, SEEK_CUR);	518	PUTBACK; \
384	lseek (fd, offset, SEEK_SET);	519	req_submit (req); \
385	res = write (fd, buf, count);	520	SPAGAIN; \
386	lseek (fd, offset, SEEK_SET);	521	\
387	pthread_mutex_unlock (&iolock);	522	if (GIMME_V != G_VOID) \
		523	XPUSHs (req_sv (req, AIO_REQ_KLASS));
388		524
389	return res;	525	MODULE = IO::AIO PACKAGE = IO::AIO
390	}	526
		527	PROTOTYPES: ENABLE
		528
		529	BOOT:
		530	{
		531	static const struct {
		532	const char *name;
		533	IV iv;
		534	} *civ, const_iv[] = {
		535	# define const_iv(name, value) { # name, (IV) value },
		536	# define const_eio(name) { # name, (IV) EIO_ ## name },
		537	const_iv (EXDEV , EXDEV)
		538	const_iv (ENOSYS , ENOSYS)
		539	const_iv (O_RDONLY, O_RDONLY)
		540	const_iv (O_WRONLY, O_WRONLY)
		541	const_iv (O_CREAT , O_CREAT)
		542	const_iv (O_TRUNC , O_TRUNC)
		543	#ifndef _WIN32
		544	const_iv (S_IFIFO , S_IFIFO)
391	#endif	545	#endif
		546	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		547	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		548	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		549	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		550	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		551	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
392		552
393	#if !HAVE_FDATASYNC	553	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
394	# define fdatasync fsync	554	const_eio (SYNC_FILE_RANGE_WRITE)
395	#endif	555	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
396		556
397	#if !HAVE_READAHEAD	557	const_eio (READDIR_DENTS)
398	# define readahead aio_readahead	558	const_eio (READDIR_DIRS_FIRST)
		559	const_eio (READDIR_STAT_ORDER)
		560	const_eio (READDIR_FOUND_UNKNOWN)
399		561
400	static char readahead_buf[4096];	562	const_eio (DT_UNKNOWN)
		563	const_eio (DT_FIFO)
		564	const_eio (DT_CHR)
		565	const_eio (DT_DIR)
		566	const_eio (DT_BLK)
		567	const_eio (DT_REG)
		568	const_eio (DT_LNK)
		569	const_eio (DT_SOCK)
		570	const_eio (DT_WHT)
		571	};
401		572
402	static ssize_t	573	stash = gv_stashpv ("IO::AIO", 1);
403	readahead (int fd, off_t offset, size_t count)
404	{
405	while (count > 0)
406	{
407	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
408		574
409	pread (fd, readahead_buf, len, offset);	575	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
410	offset += len;	576	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
411	count -= len;
412	}
413		577
414	errno = 0;
415	}
416	#endif
417
418	/*****************************************************************************/
419
420	static void *
421	aio_proc (void *thr_arg)
422	{
423	aio_req req;
424	int type;
425
426	do
427	{
428	pthread_mutex_lock (&reqlock);
429
430	for (;;)
431	{
432	req = reqs;
433
434	if (reqs)
435	{
436	reqs = reqs->next;
437	if (!reqs) reqe = 0;
438	}
439
440	if (req)
441	break;
442
443	pthread_cond_wait (&reqwait, &reqlock);
444	}
445
446	pthread_mutex_unlock (&reqlock);
447
448	errno = 0; /* strictly unnecessary */
449
450	type = req->type;
451
452	switch (type)
453	{
454	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
455	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
456
457	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
458
459	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
460	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
461	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
462
463	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
464	case REQ_CLOSE: req->result = close (req->fd); break;
465	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
466	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
467	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
468
469	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
470	case REQ_FSYNC: req->result = fsync (req->fd); break;
471
472	case REQ_QUIT:
473	break;
474
475	default:
476	req->result = ENOSYS;
477	break;
478	}
479
480	req->errorno = errno;
481
482	pthread_mutex_lock (&reslock);
483
484	req->next = 0;
485
486	if (rese)
487	{
488	rese->next = req;
489	rese = req;
490	}
491	else
492	{
493	rese = ress = req;
494
495	/* write a dummy byte to the pipe so fh becomes ready */
496	write (respipe [1], &respipe, 1);
497	}
498
499	pthread_mutex_unlock (&reslock);
500	}
501	while (type != REQ_QUIT);
502
503	return 0;
504	}
505
506	#define dREQ \
507	aio_req req; \
508	\
509	if (SvOK (callback) && !SvROK (callback)) \
510	croak ("clalback must be undef or of reference type"); \
511	\
512	Newz (0, req, 1, aio_cb); \
513	if (!req) \
514	croak ("out of memory during aio_req allocation"); \
515	\
516	req->callback = newSVsv (callback);
517
518	MODULE = IO::AIO PACKAGE = IO::AIO
519
520	PROTOTYPES: ENABLE
521
522	BOOT:
523	{
524	create_pipe ();	578	create_respipe ();
525	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
526	}
527		579
		580	if (eio_init (want_poll, done_poll) < 0)
		581	croak ("IO::AIO: unable to initialise eio library");
		582
		583	/* atfork child called in fifo order, so before eio's handler */
		584	X_THREAD_ATFORK (0, 0, atfork_child);
		585	}
		586
528	void	587	void
529	min_parallel(nthreads)	588	max_poll_reqs (int nreqs)
530	int nthreads
531	PROTOTYPE: $	589	PROTOTYPE: $
		590	CODE:
		591	eio_set_max_poll_reqs (nreqs);
532		592
533	void	593	void
534	max_parallel(nthreads)	594	max_poll_time (double nseconds)
535	int nthreads
536	PROTOTYPE: $	595	PROTOTYPE: $
537
538	int
539	max_outstanding(nreqs)
540	int nreqs
541	PROTOTYPE: $
542	CODE:	596	CODE:
543	RETVAL = max_outstanding;	597	eio_set_max_poll_time (nseconds);
		598
		599	void
		600	min_parallel (int nthreads)
		601	PROTOTYPE: $
		602	CODE:
		603	eio_set_min_parallel (nthreads);
		604
		605	void
		606	max_parallel (int nthreads)
		607	PROTOTYPE: $
		608	CODE:
		609	eio_set_max_parallel (nthreads);
		610
		611	void
		612	max_idle (int nthreads)
		613	PROTOTYPE: $
		614	CODE:
		615	eio_set_max_idle (nthreads);
		616
		617	void
		618	max_outstanding (int maxreqs)
		619	PROTOTYPE: $
		620	CODE:
544	max_outstanding = nreqs;	621	max_outstanding = maxreqs;
545		622
546	void	623	void
547	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	624	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
548	SV * pathname
549	int flags
550	int mode
551	SV * callback
552	PROTOTYPE: $$$;$	625	PROTOTYPE: $$$;$
553	CODE:	626	PPCODE:
554	{	627	{
555	dREQ;	628	dREQ;
556		629
557	req->type = REQ_OPEN;	630	req->type = EIO_OPEN;
558	req->data = newSVsv (pathname);	631	req->sv1 = newSVsv (pathname);
559	req->dataptr = SvPVbyte_nolen (req->data);	632	req->ptr1 = SvPVbyte_nolen (req->sv1);
560	req->fd = flags;	633	req->int1 = flags;
561	req->mode = mode;	634	req->int2 = mode;
562		635
563	send_req (req);	636	REQ_SEND;
564	}	637	}
565		638
566	void	639	void
567	aio_close(fh,callback=&PL_sv_undef)	640	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
568	SV * fh
569	SV * callback
570	PROTOTYPE: $;$	641	PROTOTYPE: $;$
571	ALIAS:	642	ALIAS:
572	aio_close = REQ_CLOSE
573	aio_fsync = REQ_FSYNC	643	aio_fsync = EIO_FSYNC
574	aio_fdatasync = REQ_FDATASYNC	644	aio_fdatasync = EIO_FDATASYNC
575	CODE:	645	PPCODE:
576	{	646	{
		647	int fd = s_fileno_croak (fh, 0);
577	dREQ;	648	dREQ;
578		649
579	req->type = ix;	650	req->type = ix;
580	req->fh = newSVsv (fh);	651	req->sv1 = newSVsv (fh);
581	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	652	req->int1 = fd;
582		653
583	send_req (req);	654	REQ_SEND (req);
584	}	655	}
585		656
586	void	657	void
		658	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		659	PROTOTYPE: $$$$;$
		660	PPCODE:
		661	{
		662	int fd = s_fileno_croak (fh, 0);
		663	dREQ;
		664
		665	req->type = EIO_SYNC_FILE_RANGE;
		666	req->sv1 = newSVsv (fh);
		667	req->int1 = fd;
		668	req->offs = offset;
		669	req->size = nbytes;
		670	req->int2 = flags;
		671
		672	REQ_SEND (req);
		673	}
		674
		675	void
		676	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		677	PROTOTYPE: $;$
		678	PPCODE:
		679	{
		680	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		681	int fd = s_fileno_croak (fh, 0);
		682	dREQ;
		683
		684	if (close_pipe < 0)
		685	{
		686	int pipefd [2];
		687
		688	if (pipe (pipefd) < 0
		689	|| close (pipefd [1]) < 0
		690	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		691	abort (); /*D*/
		692
		693	close_pipe = pipefd [0];
		694	}
		695
		696	req->type = EIO_DUP2;
		697	req->int1 = close_pipe;
		698	req->sv2 = newSVsv (fh);
		699	req->int2 = fd;
		700
		701	REQ_SEND (req);
		702	}
		703
		704	void
587	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	705	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
588	SV * fh
589	UV offset
590	IV length
591	SV * data
592	IV dataoffset
593	SV * callback
594	ALIAS:	706	ALIAS:
595	aio_read = REQ_READ	707	aio_read = EIO_READ
596	aio_write = REQ_WRITE	708	aio_write = EIO_WRITE
597	PROTOTYPE: $$$$$;$	709	PROTOTYPE: $$$$$;$
598	CODE:	710	PPCODE:
599	{	711	{
600	aio_req req;
601	STRLEN svlen;	712	STRLEN svlen;
		713	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
602	char *svptr = SvPVbyte (data, svlen);	714	char *svptr = SvPVbyte (data, svlen);
603		715	UV len = SvUV (length);
604	SvUPGRADE (data, SVt_PV);
605	SvPOK_on (data);
606		716
607	if (dataoffset < 0)	717	if (dataoffset < 0)
608	dataoffset += svlen;	718	dataoffset += svlen;
609		719
610	if (dataoffset < 0 || dataoffset > svlen)	720	if (dataoffset < 0 || dataoffset > svlen)
611	croak ("data offset outside of string");	721	croak ("dataoffset outside of data scalar");
612		722
613	if (ix == REQ_WRITE)	723	if (ix == EIO_WRITE)
614	{	724	{
615	/* write: check length and adjust. */	725	/* write: check length and adjust. */
616	if (length < 0 || length + dataoffset > svlen)	726	if (!SvOK (length) || len + dataoffset > svlen)
617	length = svlen - dataoffset;	727	len = svlen - dataoffset;
618	}	728	}
619	else	729	else
620	{	730	{
621	/* read: grow scalar as necessary */	731	/* read: check type and grow scalar as necessary */
		732	SvUPGRADE (data, SVt_PV);
622	svptr = SvGROW (data, length + dataoffset);	733	svptr = SvGROW (data, len + dataoffset + 1);
623	}	734	}
624
625	if (length < 0)
626	croak ("length must not be negative");
627		735
628	{	736	{
629	dREQ;	737	dREQ;
630		738
631	req->type = ix;	739	req->type = ix;
632	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
633	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	741	req->int1 = fd;
634	: IoOFP (sv_2io (fh)));	742	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
635	req->offset = offset;	743	req->size = len;
636	req->length = length;
637	req->data = SvREFCNT_inc (data);	744	req->sv2 = SvREFCNT_inc (data);
638	req->dataptr = (char *)svptr + dataoffset;	745	req->ptr2 = (char *)svptr + dataoffset;
		746	req->stroffset = dataoffset;
639		747
640	if (!SvREADONLY (data))	748	if (!SvREADONLY (data))
641	{	749	{
642	SvREADONLY_on (data);	750	SvREADONLY_on (data);
643	req->data2ptr = (void *)data;	751	req->flags |= FLAG_SV2_RO_OFF;
644	}	752	}
645		753
646	send_req (req);	754	REQ_SEND;
647	}	755	}
648	}	756	}
649		757
650	void	758	void
		759	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		760	PROTOTYPE: $$;$
		761	PPCODE:
		762	{
		763	SV *data;
		764	dREQ;
		765
		766	req->type = EIO_READLINK;
		767	req->sv1 = newSVsv (path);
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769
		770	REQ_SEND;
		771	}
		772
		773	void
		774	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		775	PROTOTYPE: $$$$;$
		776	PPCODE:
		777	{
		778	int ifd = s_fileno_croak (in_fh , 0);
		779	int ofd = s_fileno_croak (out_fh, 1);
		780	dREQ;
		781
		782	req->type = EIO_SENDFILE;
		783	req->sv1 = newSVsv (out_fh);
		784	req->int1 = ofd;
		785	req->sv2 = newSVsv (in_fh);
		786	req->int2 = ifd;
		787	req->offs = in_offset;
		788	req->size = length;
		789
		790	REQ_SEND;
		791	}
		792
		793	void
651	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	794	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
652	SV * fh
653	UV offset
654	IV length
655	SV * callback
656	PROTOTYPE: $$$;$	795	PROTOTYPE: $$$;$
657	CODE:	796	PPCODE:
658	{	797	{
		798	int fd = s_fileno_croak (fh, 0);
659	dREQ;	799	dREQ;
660		800
661	req->type = REQ_READAHEAD;	801	req->type = EIO_READAHEAD;
662	req->fh = newSVsv (fh);	802	req->sv1 = newSVsv (fh);
663	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	803	req->int1 = fd;
664	req->offset = offset;	804	req->offs = offset;
665	req->length = length;	805	req->size = length;
666		806
667	send_req (req);	807	REQ_SEND;
668	}	808	}
669		809
670	void	810	void
671	aio_stat(fh_or_path,callback=&PL_sv_undef)	811	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
672	SV * fh_or_path
673	SV * callback
674	ALIAS:	812	ALIAS:
675	aio_stat = REQ_STAT	813	aio_stat = EIO_STAT
676	aio_lstat = REQ_LSTAT	814	aio_lstat = EIO_LSTAT
677	CODE:	815	PPCODE:
678	{	816	{
679	dREQ;	817	dREQ;
680		818
681	New (0, req->statdata, 1, Stat_t);	819	req->sv1 = newSVsv (fh_or_path);
682	if (!req->statdata)
683	{
684	free_req (req);
685	croak ("out of memory during aio_req->statdata allocation");
686	}
687		820
688	if (SvPOK (fh_or_path))	821	if (SvPOK (req->sv1))
689	{	822	{
690	req->type = ix;	823	req->type = ix;
691	req->data = newSVsv (fh_or_path);
692	req->dataptr = SvPVbyte_nolen (req->data);	824	req->ptr1 = SvPVbyte_nolen (req->sv1);
693	}	825	}
694	else	826	else
695	{	827	{
696	req->type = REQ_FSTAT;	828	req->type = EIO_FSTAT;
697	req->fh = newSVsv (fh_or_path);
698	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	829	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		830	}
		831
		832	REQ_SEND;
		833	}
		834
		835	void
		836	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		837	PPCODE:
		838	{
		839	dREQ;
		840
		841	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		842	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		843	req->sv1 = newSVsv (fh_or_path);
		844
		845	if (SvPOK (req->sv1))
699	}	846	{
		847	req->type = EIO_UTIME;
		848	req->ptr1 = SvPVbyte_nolen (req->sv1);
		849	}
		850	else
		851	{
		852	req->type = EIO_FUTIME;
		853	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		854	}
700		855
701	send_req (req);	856	REQ_SEND;
702	}	857	}
703		858
704	void	859	void
		860	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->sv1 = newSVsv (fh_or_path);
		866	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		867
		868	if (SvPOK (req->sv1))
		869	{
		870	req->type = EIO_TRUNCATE;
		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
		872	}
		873	else
		874	{
		875	req->type = EIO_FTRUNCATE;
		876	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		877	}
		878
		879	REQ_SEND;
		880	}
		881
		882	void
		883	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		884	ALIAS:
		885	aio_chmod = EIO_CHMOD
		886	aio_mkdir = EIO_MKDIR
		887	PPCODE:
		888	{
		889	dREQ;
		890
		891	req->int2 = mode;
		892	req->sv1 = newSVsv (fh_or_path);
		893
		894	if (SvPOK (req->sv1))
		895	{
		896	req->type = ix;
		897	req->ptr1 = SvPVbyte_nolen (req->sv1);
		898	}
		899	else
		900	{
		901	req->type = EIO_FCHMOD;
		902	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		903	}
		904
		905	REQ_SEND;
		906	}
		907
		908	void
		909	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		910	PPCODE:
		911	{
		912	dREQ;
		913
		914	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		915	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		916	req->sv1 = newSVsv (fh_or_path);
		917
		918	if (SvPOK (req->sv1))
		919	{
		920	req->type = EIO_CHOWN;
		921	req->ptr1 = SvPVbyte_nolen (req->sv1);
		922	}
		923	else
		924	{
		925	req->type = EIO_FCHOWN;
		926	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		927	}
		928
		929	REQ_SEND;
		930	}
		931
		932	void
		933	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		934	PPCODE:
		935	{
		936	dREQ;
		937
		938	req->type = EIO_READDIR;
		939	req->sv1 = newSVsv (pathname);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		942
		943	if (flags & EIO_READDIR_DENTS)
		944	req->int1 |= EIO_READDIR_CUSTOM2;
		945
		946	REQ_SEND;
		947	}
		948
		949	void
705	aio_unlink(pathname,callback=&PL_sv_undef)	950	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
706	SV * pathname
707	SV * callback
708	ALIAS:	951	ALIAS:
709	aio_unlink = REQ_UNLINK	952	aio_unlink = EIO_UNLINK
710	aio_rmdir = REQ_RMDIR	953	aio_rmdir = EIO_RMDIR
		954	aio_readdir = EIO_READDIR
711	CODE:	955	PPCODE:
712	{	956	{
713	dREQ;	957	dREQ;
714		958
715	req->type = ix;	959	req->type = ix;
716	req->data = newSVsv (pathname);	960	req->sv1 = newSVsv (pathname);
717	req->dataptr = SvPVbyte_nolen (req->data);	961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962
		963	REQ_SEND;
		964	}
		965
		966	void
		967	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		968	ALIAS:
		969	aio_link = EIO_LINK
		970	aio_symlink = EIO_SYMLINK
		971	aio_rename = EIO_RENAME
		972	PPCODE:
		973	{
		974	dREQ;
718		975
719	send_req (req);	976	req->type = ix;
720	}	977	req->sv1 = newSVsv (oldpath);
721		978	req->ptr1 = SvPVbyte_nolen (req->sv1);
722	void	979	req->sv2 = newSVsv (newpath);
723	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	980	req->ptr2 = SvPVbyte_nolen (req->sv2);
724	SV * oldpath
725	SV * newpath
726	SV * callback
727	CODE:
728	{
729	dREQ;
730		981
731	req->type = REQ_SYMLINK;	982	REQ_SEND;
732	req->fh = newSVsv (oldpath);	983	}
733	req->data2ptr = SvPVbyte_nolen (req->fh);	984
734	req->data = newSVsv (newpath);	985	void
735	req->dataptr = SvPVbyte_nolen (req->data);	986	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		987	PPCODE:
		988	{
		989	dREQ;
736		990
737	send_req (req);	991	req->type = EIO_MKNOD;
		992	req->sv1 = newSVsv (pathname);
		993	req->ptr1 = SvPVbyte_nolen (req->sv1);
		994	req->int2 = (mode_t)mode;
		995	req->offs = dev;
		996
		997	REQ_SEND;
738	}	998	}
739		999
740	void	1000	void
		1001	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1002	PPCODE:
		1003	{
		1004	dREQ;
		1005
		1006	req->type = EIO_BUSY;
		1007	req->nv1 = delay < 0. ? 0. : delay;
		1008
		1009	REQ_SEND;
		1010	}
		1011
		1012	void
		1013	aio_group (SV *callback=&PL_sv_undef)
		1014	PROTOTYPE: ;$
		1015	PPCODE:
		1016	{
		1017	dREQ;
		1018
		1019	req->type = EIO_GROUP;
		1020
		1021	req_submit (req);
		1022	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1023	}
		1024
		1025	void
		1026	aio_nop (SV *callback=&PL_sv_undef)
		1027	ALIAS:
		1028	aio_nop = EIO_NOP
		1029	aio_sync = EIO_SYNC
		1030	PPCODE:
		1031	{
		1032	dREQ;
		1033
		1034	req->type = ix;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	int
		1040	aioreq_pri (int pri = 0)
		1041	PROTOTYPE: ;$
		1042	CODE:
		1043	RETVAL = next_pri;
		1044	if (items > 0)
		1045	{
		1046	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1047	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1048	next_pri = pri;
		1049	}
		1050	OUTPUT:
		1051	RETVAL
		1052
		1053	void
		1054	aioreq_nice (int nice = 0)
		1055	CODE:
		1056	nice = next_pri - nice;
		1057	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1058	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1059	next_pri = nice;
		1060
		1061	void
741	flush()	1062	flush ()
742	PROTOTYPE:	1063	PROTOTYPE:
743	CODE:	1064	CODE:
744	while (nreqs)	1065	while (eio_nreqs ())
745	{	1066	{
746	poll_wait ();	1067	poll_wait ();
747	poll_cb ();	1068	poll_cb ();
748	}	1069	}
749		1070
750	void	1071	int
751	poll()	1072	poll()
752	PROTOTYPE:	1073	PROTOTYPE:
753	CODE:	1074	CODE:
754	if (nreqs)
755	{
756	poll_wait ();	1075	poll_wait ();
757	poll_cb ();	1076	RETVAL = poll_cb ();
758	}	1077	OUTPUT:
		1078	RETVAL
759		1079
760	int	1080	int
761	poll_fileno()	1081	poll_fileno()
762	PROTOTYPE:	1082	PROTOTYPE:
763	CODE:	1083	CODE:
764	RETVAL = respipe [0];	1084	RETVAL = s_epipe_fd (&respipe);
765	OUTPUT:	1085	OUTPUT:
766	RETVAL	1086	RETVAL
767		1087
768	int	1088	int
769	poll_cb(...)	1089	poll_cb(...)
…		…
775		1095
776	void	1096	void
777	poll_wait()	1097	poll_wait()
778	PROTOTYPE:	1098	PROTOTYPE:
779	CODE:	1099	CODE:
780	if (nreqs)
781	poll_wait ();	1100	poll_wait ();
782		1101
783	int	1102	int
784	nreqs()	1103	nreqs()
785	PROTOTYPE:	1104	PROTOTYPE:
786	CODE:	1105	CODE:
787	RETVAL = nreqs;	1106	RETVAL = eio_nreqs ();
788	OUTPUT:	1107	OUTPUT:
789	RETVAL	1108	RETVAL
790		1109
		1110	int
		1111	nready()
		1112	PROTOTYPE:
		1113	CODE:
		1114	RETVAL = eio_nready ();
		1115	OUTPUT:
		1116	RETVAL
		1117
		1118	int
		1119	npending()
		1120	PROTOTYPE:
		1121	CODE:
		1122	RETVAL = eio_npending ();
		1123	OUTPUT:
		1124	RETVAL
		1125
		1126	int
		1127	nthreads()
		1128	PROTOTYPE:
		1129	CODE:
		1130	RETVAL = eio_nthreads ();
		1131	OUTPUT:
		1132	RETVAL
		1133
		1134	int
		1135	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1136	PROTOTYPE: $$$$
		1137	CODE:
		1138	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1139	RETVAL = posix_fadvise (fh, offset, length, advice);
		1140	#else
		1141	RETVAL = errno = ENOSYS;
		1142	#endif
		1143	OUTPUT:
		1144	RETVAL
		1145
		1146	ssize_t
		1147	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1148	PROTOTYPE: $$$$
		1149	CODE:
		1150	eio_sendfile_sync (ofh, ifh, offset, count);
		1151
		1152	void _on_next_submit (SV *cb)
		1153	CODE:
		1154	SvREFCNT_dec (on_next_submit);
		1155	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1156
		1157	PROTOTYPES: DISABLE
		1158
		1159	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1160
		1161	void
		1162	cancel (aio_req_ornot req)
		1163	CODE:
		1164	eio_cancel (req);
		1165
		1166	void
		1167	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1168	PPCODE:
		1169	{
		1170	if (GIMME_V != G_VOID)
		1171	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1172
		1173	if (items > 1)
		1174	{
		1175	SV *cb_cv =get_cb (callback);
		1176
		1177	SvREFCNT_dec (req->callback);
		1178	req->callback = SvREFCNT_inc (cb_cv);
		1179	}
		1180	}
		1181
		1182	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1183
		1184	void
		1185	add (aio_req grp, ...)
		1186	PPCODE:
		1187	{
		1188	int i;
		1189
		1190	if (grp->int1 == 2)
		1191	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1192
		1193	for (i = 1; i < items; ++i )
		1194	{
		1195	aio_req req;
		1196
		1197	if (GIMME_V != G_VOID)
		1198	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1199
		1200	req = SvAIO_REQ (ST (i));
		1201
		1202	if (req)
		1203	eio_grp_add (grp, req);
		1204	}
		1205	}
		1206
		1207	void
		1208	cancel_subs (aio_req_ornot req)
		1209	CODE:
		1210	req_cancel_subs (req);
		1211
		1212	void
		1213	result (aio_req grp, ...)
		1214	CODE:
		1215	{
		1216	int i;
		1217	AV *av;
		1218
		1219	grp->errorno = errno;
		1220
		1221	av = newAV ();
		1222	av_extend (av, items - 1);
		1223
		1224	for (i = 1; i < items; ++i )
		1225	av_push (av, newSVsv (ST (i)));
		1226
		1227	SvREFCNT_dec (grp->sv1);
		1228	grp->sv1 = (SV *)av;
		1229	}
		1230
		1231	void
		1232	errno (aio_req grp, int errorno = errno)
		1233	CODE:
		1234	grp->errorno = errorno;
		1235
		1236	void
		1237	limit (aio_req grp, int limit)
		1238	CODE:
		1239	eio_grp_limit (grp, limit);
		1240
		1241	void
		1242	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1243	CODE:
		1244	{
		1245	SvREFCNT_dec (grp->sv2);
		1246	grp->sv2 = newSVsv (callback);
		1247	grp->feed = aio_grp_feed;
		1248
		1249	if (grp->int2 <= 0)
		1250	grp->int2 = 2;
		1251
		1252	eio_grp_limit (grp, grp->int2);
		1253	}
		1254

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