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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 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->statdata)
148	{
149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150	PL_laststatval = req->result;
151	PL_statcache = *(req->statdata);
152	}
153
154	ENTER;
155	PUSHMARK (SP);
156	XPUSHs (sv_2mortal (newSViv (req->result)));
157
158	if (req->type == REQ_OPEN)
159	{
160	/* convert fd to fh */
161	SV *fh;
162
163	PUTBACK;
164	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
165	SPAGAIN;
166
167	fh = SvREFCNT_inc (POPs);
168
169	PUSHMARK (SP);
170	XPUSHs (sv_2mortal (fh));
171	}
172
173	if (SvOK (req->callback))
174	{
175	PUTBACK;
176	call_sv (req->callback, G_VOID | G_EVAL);
177	SPAGAIN;
178
179	if (SvTRUE (ERRSV))
180	{
181	free_req (req);
182	croak (0);	481	croak (0);
183	}
184	}
185		482
186	LEAVE;	483	if (!max_outstanding || max_outstanding > eio_nreqs ())
		484	return res;
187		485
188	errno = errorno;	486	poll_wait ();
189	count++;
190	}
191
192	free_req (req);
193	}	487	}
194
195	return count;
196	}
197
198	static void *aio_proc(void *arg);
199
200	static void
201	start_thread (void)
202	{
203	sigset_t fullsigset, oldsigset;
204	pthread_t tid;
205	pthread_attr_t attr;
206
207	pthread_attr_init (&attr);
208	pthread_attr_setstacksize (&attr, STACKSIZE);
209	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
210
211	sigfillset (&fullsigset);
212	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
213
214	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
215	started++;
216
217	sigprocmask (SIG_SETMASK, &oldsigset, 0);
218	}
219
220	static void
221	send_req (aio_req req)
222	{
223	nreqs++;
224
225	pthread_mutex_lock (&reqlock);
226
227	req->next = 0;
228
229	if (reqe)
230	{
231	reqe->next = req;
232	reqe = req;
233	}
234	else
235	reqe = reqs = req;
236
237	pthread_cond_signal (&reqwait);
238	pthread_mutex_unlock (&reqlock);
239
240	if (nreqs > max_outstanding)
241	for (;;)
242	{
243	poll_cb ();
244
245	if (nreqs <= max_outstanding)
246	break;
247
248	poll_wait ();
249	}
250	}
251
252	static void
253	end_thread (void)
254	{
255	aio_req req;
256	Newz (0, req, 1, aio_cb);
257	req->type = REQ_QUIT;
258
259	send_req (req);
260	}
261
262	static void min_parallel (int nthreads)
263	{
264	while (nthreads > started)
265	start_thread ();
266	}
267
268	static void max_parallel (int nthreads)
269	{
270	int cur = started;
271
272	while (cur > nthreads)
273	{
274	end_thread ();
275	cur--;
276	}
277
278	while (started > nthreads)
279	{
280	poll_wait ();
281	poll_cb ();
282	}
283	}
284
285	static void create_pipe ()
286	{
287	if (pipe (respipe))
288	croak ("unable to initialize result pipe");
289
290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
291	croak ("cannot set result pipe to nonblocking mode");
292
293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295	}
296
297	static void atfork_prepare (void)
298	{
299	for (;;) {
300
301	for (;;)
302	{
303	poll_cb ();
304
305	if (!nreqs)
306	break;
307
308	poll_wait ();
309	}
310
311	pthread_mutex_lock (&reqlock);
312
313	if (!nreqs)
314	break;
315
316	pthread_mutex_unlock (&reqlock);
317	}
318
319	pthread_mutex_lock (&reslock);
320
321	assert (!nreqs && !reqs && !ress);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	488	}
329		489
330	static void atfork_child (void)	490	static void atfork_child (void)
331	{	491	{
332	int restart = started;	492	create_respipe ();
333	started = 0;
334
335	atfork_parent ();
336
337	min_parallel (restart);
338	}	493	}
339		494
340	/*****************************************************************************/	495	static SV *
341	/* work around various missing functions */	496	get_cb (SV *cb_sv)
342
343	#if !HAVE_PREADWRITE
344	# define pread aio_pread
345	# define pwrite aio_pwrite
346
347	/*
348	* make our pread/pwrite safe against themselves, but not against
349	* normal read/write by using a mutex. slows down execution a lot,
350	* but that's your problem, not mine.
351	*/
352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
353
354	static ssize_t
355	pread (int fd, void *buf, size_t count, off_t offset)
356	{	497	{
357	ssize_t res;	498	SvGETMAGIC (cb_sv);
358	off_t ooffset;	499	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
359
360	pthread_mutex_lock (&iolock);
361	ooffset = lseek (fd, 0, SEEK_CUR);
362	lseek (fd, offset, SEEK_SET);
363	res = read (fd, buf, count);
364	lseek (fd, ooffset, SEEK_SET);
365	pthread_mutex_unlock (&iolock);
366
367	return res;
368	}	500	}
369		501
370	static ssize_t	502	#define dREQ \
371	pwrite (int fd, void *buf, size_t count, off_t offset)	503	SV *cb_cv; \
372	{	504	aio_req req; \
373	ssize_t res;	505	int req_pri = next_pri; \
374	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
375		516
376	pthread_mutex_lock (&iolock);	517	#define REQ_SEND \
377	ooffset = lseek (fd, 0, SEEK_CUR);	518	PUTBACK; \
378	lseek (fd, offset, SEEK_SET);	519	req_submit (req); \
379	res = write (fd, buf, count);	520	SPAGAIN; \
380	lseek (fd, offset, SEEK_SET);	521	\
381	pthread_mutex_unlock (&iolock);	522	if (GIMME_V != G_VOID) \
		523	XPUSHs (req_sv (req, AIO_REQ_KLASS));
382		524
383	return res;	525	MODULE = IO::AIO PACKAGE = IO::AIO
384	}	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)
385	#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)
386		552
387	#if !HAVE_FDATASYNC	553	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
388	# define fdatasync fsync	554	const_eio (SYNC_FILE_RANGE_WRITE)
389	#endif	555	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
390		556
391	#if !HAVE_READAHEAD	557	const_eio (READDIR_DENTS)
392	# define readahead aio_readahead	558	const_eio (READDIR_DIRS_FIRST)
		559	const_eio (READDIR_STAT_ORDER)
		560	const_eio (READDIR_FOUND_UNKNOWN)
393		561
394	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	};
395		572
396	static ssize_t	573	stash = gv_stashpv ("IO::AIO", 1);
397	readahead (int fd, off_t offset, size_t count)
398	{
399	while (count > 0)
400	{
401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
402		574
403	pread (fd, readahead_buf, len, offset);	575	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
404	offset += len;	576	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
405	count -= len;
406	}
407		577
408	errno = 0;
409	}
410	#endif
411
412	/*****************************************************************************/
413
414	static void *
415	aio_proc (void *thr_arg)
416	{
417	aio_req req;
418	int type;
419
420	do
421	{
422	pthread_mutex_lock (&reqlock);
423
424	for (;;)
425	{
426	req = reqs;
427
428	if (reqs)
429	{
430	reqs = reqs->next;
431	if (!reqs) reqe = 0;
432	}
433
434	if (req)
435	break;
436
437	pthread_cond_wait (&reqwait, &reqlock);
438	}
439
440	pthread_mutex_unlock (&reqlock);
441
442	errno = 0; /* strictly unnecessary */
443
444	type = req->type;
445
446	switch (type)
447	{
448	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
449	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450
451	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
452
453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456
457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
458	case REQ_CLOSE: req->result = close (req->fd); break;
459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
462
463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
464	case REQ_FSYNC: req->result = fsync (req->fd); break;
465
466	case REQ_QUIT:
467	break;
468
469	default:
470	req->result = ENOSYS;
471	break;
472	}
473
474	req->errorno = errno;
475
476	pthread_mutex_lock (&reslock);
477
478	req->next = 0;
479
480	if (rese)
481	{
482	rese->next = req;
483	rese = req;
484	}
485	else
486	{
487	rese = ress = req;
488
489	/* write a dummy byte to the pipe so fh becomes ready */
490	write (respipe [1], &respipe, 1);
491	}
492
493	pthread_mutex_unlock (&reslock);
494	}
495	while (type != REQ_QUIT);
496
497	return 0;
498	}
499
500	#define dREQ \
501	aio_req req; \
502	\
503	if (SvOK (callback) && !SvROK (callback)) \
504	croak ("clalback must be undef or of reference type"); \
505	\
506	Newz (0, req, 1, aio_cb); \
507	if (!req) \
508	croak ("out of memory during aio_req allocation"); \
509	\
510	req->callback = newSVsv (callback);
511
512	MODULE = IO::AIO PACKAGE = IO::AIO
513
514	PROTOTYPES: ENABLE
515
516	BOOT:
517	{
518	create_pipe ();	578	create_respipe ();
519	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
520	}
521		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
522	void	587	void
523	min_parallel(nthreads)	588	max_poll_reqs (int nreqs)
524	int nthreads
525	PROTOTYPE: $	589	PROTOTYPE: $
		590	CODE:
		591	eio_set_max_poll_reqs (nreqs);
526		592
527	void	593	void
528	max_parallel(nthreads)	594	max_poll_time (double nseconds)
529	int nthreads
530	PROTOTYPE: $	595	PROTOTYPE: $
531
532	int
533	max_outstanding(nreqs)
534	int nreqs
535	PROTOTYPE: $
536	CODE:	596	CODE:
537	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:
538	max_outstanding = nreqs;	621	max_outstanding = maxreqs;
539		622
540	void	623	void
541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	624	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
542	SV * pathname
543	int flags
544	int mode
545	SV * callback
546	PROTOTYPE: $$$;$	625	PROTOTYPE: $$$;$
547	CODE:	626	PPCODE:
548	{	627	{
549	dREQ;	628	dREQ;
550		629
551	req->type = REQ_OPEN;	630	req->type = EIO_OPEN;
552	req->data = newSVsv (pathname);	631	req->sv1 = newSVsv (pathname);
553	req->dataptr = SvPVbyte_nolen (req->data);	632	req->ptr1 = SvPVbyte_nolen (req->sv1);
554	req->fd = flags;	633	req->int1 = flags;
555	req->mode = mode;	634	req->int2 = mode;
556		635
557	send_req (req);	636	REQ_SEND;
558	}	637	}
559		638
560	void	639	void
561	aio_close(fh,callback=&PL_sv_undef)	640	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
562	SV * fh
563	SV * callback
564	PROTOTYPE: $;$	641	PROTOTYPE: $;$
565	ALIAS:	642	ALIAS:
566	aio_close = REQ_CLOSE
567	aio_fsync = REQ_FSYNC	643	aio_fsync = EIO_FSYNC
568	aio_fdatasync = REQ_FDATASYNC	644	aio_fdatasync = EIO_FDATASYNC
569	CODE:	645	PPCODE:
570	{	646	{
		647	int fd = s_fileno_croak (fh, 0);
571	dREQ;	648	dREQ;
572		649
573	req->type = ix;	650	req->type = ix;
574	req->fh = newSVsv (fh);	651	req->sv1 = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	652	req->int1 = fd;
576		653
577	send_req (req);	654	REQ_SEND (req);
578	}	655	}
579		656
580	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: $$$$;$
		660	PPCODE:
		661	{
		662	int fd = s_fileno_croak (fh, 0);
		663	dREQ;
		664
		665	req->type = EIO_SYNC_FILE_RANGE;
		666	req->sv1 = newSVsv (fh);
		667	req->int1 = fd;
		668	req->offs = offset;
		669	req->size = nbytes;
		670	req->int2 = flags;
		671
		672	REQ_SEND (req);
		673	}
		674
		675	void
		676	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		677	PROTOTYPE: $;$
		678	PPCODE:
		679	{
		680	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		681	int fd = s_fileno_croak (fh, 0);
		682	dREQ;
		683
		684	if (close_pipe < 0)
		685	{
		686	int pipefd [2];
		687
		688	if (pipe (pipefd) < 0
		689	|| close (pipefd [1]) < 0
		690	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		691	abort (); /*D*/
		692
		693	close_pipe = pipefd [0];
		694	}
		695
		696	req->type = EIO_DUP2;
		697	req->int1 = close_pipe;
		698	req->sv2 = newSVsv (fh);
		699	req->int2 = fd;
		700
		701	REQ_SEND (req);
		702	}
		703
		704	void
581	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	705	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
582	SV * fh
583	UV offset
584	IV length
585	SV * data
586	IV dataoffset
587	SV * callback
588	ALIAS:	706	ALIAS:
589	aio_read = REQ_READ	707	aio_read = EIO_READ
590	aio_write = REQ_WRITE	708	aio_write = EIO_WRITE
591	PROTOTYPE: $$$$$;$	709	PROTOTYPE: $$$$$;$
592	CODE:	710	PPCODE:
593	{	711	{
594	aio_req req;
595	STRLEN svlen;	712	STRLEN svlen;
		713	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
596	char *svptr = SvPVbyte (data, svlen);	714	char *svptr = SvPVbyte (data, svlen);
597		715	UV len = SvUV (length);
598	SvUPGRADE (data, SVt_PV);
599	SvPOK_on (data);
600		716
601	if (dataoffset < 0)	717	if (dataoffset < 0)
602	dataoffset += svlen;	718	dataoffset += svlen;
603		719
604	if (dataoffset < 0 || dataoffset > svlen)	720	if (dataoffset < 0 || dataoffset > svlen)
605	croak ("data offset outside of string");	721	croak ("dataoffset outside of data scalar");
606		722
607	if (ix == REQ_WRITE)	723	if (ix == EIO_WRITE)
608	{	724	{
609	/* write: check length and adjust. */	725	/* write: check length and adjust. */
610	if (length < 0 || length + dataoffset > svlen)	726	if (!SvOK (length) || len + dataoffset > svlen)
611	length = svlen - dataoffset;	727	len = svlen - dataoffset;
612	}	728	}
613	else	729	else
614	{	730	{
615	/* read: grow scalar as necessary */	731	/* read: check type and grow scalar as necessary */
		732	SvUPGRADE (data, SVt_PV);
616	svptr = SvGROW (data, length + dataoffset);	733	svptr = SvGROW (data, len + dataoffset + 1);
617	}	734	}
618
619	if (length < 0)
620	croak ("length must not be negative");
621		735
622	{	736	{
623	dREQ;	737	dREQ;
624		738
625	req->type = ix;	739	req->type = ix;
626	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
627	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	741	req->int1 = fd;
628	: IoOFP (sv_2io (fh)));	742	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
629	req->offset = offset;	743	req->size = len;
630	req->length = length;
631	req->data = SvREFCNT_inc (data);	744	req->sv2 = SvREFCNT_inc (data);
632	req->dataptr = (char *)svptr + dataoffset;	745	req->ptr2 = (char *)svptr + dataoffset;
		746	req->stroffset = dataoffset;
633		747
634	send_req (req);	748	if (!SvREADONLY (data))
		749	{
		750	SvREADONLY_on (data);
		751	req->flags |= FLAG_SV2_RO_OFF;
		752	}
		753
		754	REQ_SEND;
635	}	755	}
636	}	756	}
637		757
638	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: $$$$;$
		776	PPCODE:
		777	{
		778	int ifd = s_fileno_croak (in_fh , 0);
		779	int ofd = s_fileno_croak (out_fh, 1);
		780	dREQ;
		781
		782	req->type = EIO_SENDFILE;
		783	req->sv1 = newSVsv (out_fh);
		784	req->int1 = ofd;
		785	req->sv2 = newSVsv (in_fh);
		786	req->int2 = ifd;
		787	req->offs = in_offset;
		788	req->size = length;
		789
		790	REQ_SEND;
		791	}
		792
		793	void
639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	794	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
640	SV * fh
641	UV offset
642	IV length
643	SV * callback
644	PROTOTYPE: $$$;$	795	PROTOTYPE: $$$;$
645	CODE:	796	PPCODE:
646	{	797	{
		798	int fd = s_fileno_croak (fh, 0);
647	dREQ;	799	dREQ;
648		800
649	req->type = REQ_READAHEAD;	801	req->type = EIO_READAHEAD;
650	req->fh = newSVsv (fh);	802	req->sv1 = newSVsv (fh);
651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	803	req->int1 = fd;
652	req->offset = offset;	804	req->offs = offset;
653	req->length = length;	805	req->size = length;
654		806
655	send_req (req);	807	REQ_SEND;
656	}	808	}
657		809
658	void	810	void
659	aio_stat(fh_or_path,callback=&PL_sv_undef)	811	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
660	SV * fh_or_path
661	SV * callback
662	ALIAS:	812	ALIAS:
663	aio_stat = REQ_STAT	813	aio_stat = EIO_STAT
664	aio_lstat = REQ_LSTAT	814	aio_lstat = EIO_LSTAT
665	CODE:	815	PPCODE:
666	{	816	{
667	dREQ;	817	dREQ;
668		818
669	New (0, req->statdata, 1, Stat_t);	819	req->sv1 = newSVsv (fh_or_path);
670	if (!req->statdata)
671	{
672	free_req (req);
673	croak ("out of memory during aio_req->statdata allocation");
674	}
675		820
676	if (SvPOK (fh_or_path))	821	if (SvPOK (req->sv1))
677	{	822	{
678	req->type = ix;	823	req->type = ix;
679	req->data = newSVsv (fh_or_path);
680	req->dataptr = SvPVbyte_nolen (req->data);	824	req->ptr1 = SvPVbyte_nolen (req->sv1);
681	}	825	}
682	else	826	else
683	{	827	{
684	req->type = REQ_FSTAT;	828	req->type = EIO_FSTAT;
685	req->fh = newSVsv (fh_or_path);
686	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))
687	}	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	}
688		855
689	send_req (req);	856	REQ_SEND;
690	}	857	}
691		858
692	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
693	aio_unlink(pathname,callback=&PL_sv_undef)	950	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
694	SV * pathname
695	SV * callback
696	ALIAS:	951	ALIAS:
697	aio_unlink = REQ_UNLINK	952	aio_unlink = EIO_UNLINK
698	aio_rmdir = REQ_RMDIR	953	aio_rmdir = EIO_RMDIR
		954	aio_readdir = EIO_READDIR
699	CODE:	955	PPCODE:
700	{	956	{
701	dREQ;	957	dREQ;
702		958
703	req->type = ix;	959	req->type = ix;
704	req->data = newSVsv (pathname);	960	req->sv1 = newSVsv (pathname);
705	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;
706		975
707	send_req (req);	976	req->type = ix;
708	}	977	req->sv1 = newSVsv (oldpath);
709		978	req->ptr1 = SvPVbyte_nolen (req->sv1);
710	void	979	req->sv2 = newSVsv (newpath);
711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	980	req->ptr2 = SvPVbyte_nolen (req->sv2);
712	SV * oldpath
713	SV * newpath
714	SV * callback
715	CODE:
716	{
717	dREQ;
718		981
719	req->type = REQ_SYMLINK;	982	REQ_SEND;
720	req->fh = newSVsv (oldpath);	983	}
721	req->data2ptr = SvPVbyte_nolen (req->fh);	984
722	req->data = newSVsv (newpath);	985	void
723	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;
724		990
725	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;
726	}	998	}
727		999
728	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
729	flush()	1062	flush ()
730	PROTOTYPE:	1063	PROTOTYPE:
731	CODE:	1064	CODE:
732	while (nreqs)	1065	while (eio_nreqs ())
733	{	1066	{
734	poll_wait ();	1067	poll_wait ();
735	poll_cb ();	1068	poll_cb ();
736	}	1069	}
737		1070
738	void	1071	int
739	poll()	1072	poll()
740	PROTOTYPE:	1073	PROTOTYPE:
741	CODE:	1074	CODE:
742	if (nreqs)
743	{
744	poll_wait ();	1075	poll_wait ();
745	poll_cb ();	1076	RETVAL = poll_cb ();
746	}	1077	OUTPUT:
		1078	RETVAL
747		1079
748	int	1080	int
749	poll_fileno()	1081	poll_fileno()
750	PROTOTYPE:	1082	PROTOTYPE:
751	CODE:	1083	CODE:
752	RETVAL = respipe [0];	1084	RETVAL = s_epipe_fd (&respipe);
753	OUTPUT:	1085	OUTPUT:
754	RETVAL	1086	RETVAL
755		1087
756	int	1088	int
757	poll_cb(...)	1089	poll_cb(...)
…		…
763		1095
764	void	1096	void
765	poll_wait()	1097	poll_wait()
766	PROTOTYPE:	1098	PROTOTYPE:
767	CODE:	1099	CODE:
768	if (nreqs)
769	poll_wait ();	1100	poll_wait ();
770		1101
771	int	1102	int
772	nreqs()	1103	nreqs()
773	PROTOTYPE:	1104	PROTOTYPE:
774	CODE:	1105	CODE:
775	RETVAL = nreqs;	1106	RETVAL = eio_nreqs ();
776	OUTPUT:	1107	OUTPUT:
777	RETVAL	1108	RETVAL
778		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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