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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.40 by root, Sat Jun 24 16:27:02 2006 UTC vs.
Revision 1.130 by root, Thu Oct 2 11:35:03 2008 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
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
13	#include <sys/types.h>	12	#include <sys/types.h>
14	#include <sys/stat.h>	13	#include <sys/stat.h>
15	#include <limits.h>	14	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	15	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	16	#include <sched.h>
20		17
21	#if HAVE_SENDFILE	18	/* perl namespace pollution */
22	# if __linux	19	#undef VERSION
23	# include <sys/sendfile.h>	20
24	# elif __freebsd	21	#ifdef _WIN32
25	# include <sys/socket.h>	22
26	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __hpux	24	# undef malloc
28	# include <sys/socket.h>	25	# undef free
29	# elif __solaris /* not yet */	26
30	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
31	# else	59	#else
32	# error sendfile support requested but not available	60
33	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
34	#endif	68	#endif
35		69
36	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
37	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
38	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
39	#endif	83	#endif
40		84
41	#if __ia64	85	/*****************************************************************************/
42	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
43	#else	89	#else
44	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
45	#endif	91	#endif
46		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
		120
47	enum {	121	enum {
48	REQ_QUIT,	122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
49	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55	REQ_READDIR,
56	REQ_LINK, REQ_SYMLINK,
57	};	123	};
58		124
59	typedef struct aio_cb {	125	#include "libeio/eio.c"
60	struct aio_cb *volatile next;
61		126
62	int type;
63
64	/* should receive a cleanup, with unions */
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75
76	Stat_t *statdata;
77	} aio_cb;
78
79	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
		128	typedef eio_req *aio_req_ornot;
80		129
81	static int started, wanted;	130	static SV *on_next_submit;
82	static volatile int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
83	static int max_outstanding = 1<<30;	132	static int max_outstanding;
84	static int respipe [2];
85		133
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		135
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	136	static void req_destroy (aio_req req);
91	static volatile aio_req ress, rese; /* queue start, queue end */
92
93	static void free_req (aio_req req)	137	static void req_cancel (aio_req req);
94	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		138
		139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
		152
		153	/* must be called at most once */
		154	static SV *req_sv (aio_req req, const char *klass)
		155	{
		156	if (!req->self)
		157	{
		158	req->self = (SV *)newHV ();
		159	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		160	}
		161
		162	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		163	}
		164
		165	static aio_req SvAIO_REQ (SV *sv)
		166	{
		167	MAGIC *mg;
		168
		169	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		170	croak ("object of class " AIO_REQ_KLASS " expected");
		171
		172	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		173
		174	return mg ? (aio_req)mg->mg_ptr : 0;
		175	}
		176
		177	static void aio_grp_feed (aio_req grp)
		178	{
		179	if (grp->sv2 && SvOK (grp->sv2))
		180	{
		181	dSP;
		182
		183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		187	PUTBACK;
		188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		189	SPAGAIN;
		190	FREETMPS;
		191	LEAVE;
		192	}
		193	}
		194
		195	static void req_submit (eio_req *req)
		196	{
		197	eio_submit (req);
		198
		199	if (expect_false (on_next_submit))
		200	{
		201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
		209	}
		210	}
		211
		212	static int req_invoke (eio_req *req)
		213	{
		214	dSP;
		215
		216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
		218
		219	if (!EIO_CANCELLED (req) && req->callback)
		220	{
		221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
		225
		226	switch (req->type)
		227	{
		228	case EIO_READDIR:
		229	{
		230	SV *rv = &PL_sv_undef;
		231
		232	if (req->result >= 0)
		233	{
		234	int i;
		235	char *buf = req->ptr2;
		236	AV *av = newAV ();
		237
		238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
		241	{
		242	SV *sv = newSVpv (buf, 0);
		243
		244	av_store (av, i, sv);
		245	buf += SvCUR (sv) + 1;
		246	}
		247
		248	rv = sv_2mortal (newRV_noinc ((SV *)av));
		249	}
		250
		251	PUSHs (rv);
		252	}
		253	break;
		254
		255	case EIO_OPEN:
		256	{
		257	/* convert fd to fh */
		258	SV *fh = &PL_sv_undef;
		259
		260	if (req->result >= 0)
		261	{
		262	GV *gv = (GV *)sv_newmortal ();
		263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
		269
		270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
		282	PUSHs (fh);
		283	}
		284	break;
		285
		286	case EIO_GROUP:
		287	req->int1 = 2; /* mark group as finished */
		288
		289	if (req->sv1)
		290	{
		291	int i;
		292	AV *av = (AV *)req->sv1;
		293
		294	EXTEND (SP, AvFILL (av) + 1);
		295	for (i = 0; i <= AvFILL (av); ++i)
		296	PUSHs (*av_fetch (av, i, 0));
		297	}
		298	break;
		299
		300	case EIO_NOP:
		301	case EIO_BUSY:
		302	break;
		303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
		328
		329	default:
		330	PUSHs (sv_2mortal (newSViv (req->result)));
		331	break;
		332	}
		333
		334	errno = req->errorno;
		335
		336	PUTBACK;
		337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		338	SPAGAIN;
		339
		340	FREETMPS;
		341	LEAVE;
		342
		343	PUTBACK;
		344	}
		345
		346	return !!SvTRUE (ERRSV);
		347	}
		348
		349	static void req_destroy (aio_req req)
		350	{
98	if (req->fh)	351	if (req->self)
		352	{
		353	sv_unmagic (req->self, PERL_MAGIC_ext);
99	SvREFCNT_dec (req->fh);	354	SvREFCNT_dec (req->self);
		355	}
100		356
101	if (req->fh2)	357	SvREFCNT_dec (req->sv1);
102	SvREFCNT_dec (req->fh2);	358	SvREFCNT_dec (req->sv2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112		360
113	Safefree (req);	361	Safefree (req);
114	}	362	}
115		363
		364	static void req_cancel_subs (aio_req grp)
		365	{
		366	aio_req sub;
		367
		368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
		382
116	static void	383	static void
117	poll_wait ()	384	create_respipe (void)
118	{	385	{
119	if (nreqs && !ress)	386	int old_readfd = respipe [0];
		387
		388	if (respipe [1] >= 0)
		389	respipe_close (TO_SOCKET (respipe [1]));
		390
		391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
120	{	399	{
121	fd_set rfd;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
122	FD_ZERO(&rfd);	401	croak ("unable to initialize result pipe(2)");
123	FD_SET(respipe [0], &rfd);
124		402
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	403	respipe_close (respipe [0]);
		404	respipe [0] = old_readfd;
126	}	405	}
127	}
128		406
129	static int	407	#ifdef _WIN32
130	poll_cb ()	408	int arg = 1;
131	{	409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
132	dSP;	410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
133	int count = 0;	411	#else
134	int do_croak = 0;	412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
135	aio_req req;	413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
136		416
		417	respipe_osf [0] = TO_SOCKET (respipe [0]);
		418	respipe_osf [1] = TO_SOCKET (respipe [1]);
		419	}
		420
		421	static void poll_wait (void)
		422	{
		423	fd_set rfd;
		424
		425	while (eio_nreqs ())
		426	{
		427	int size;
		428
		429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		442	}
		443	}
		444
		445	static int poll_cb (void)
		446	{
137	for (;;)	447	for (;;)
138	{	448	{
139	pthread_mutex_lock (&reslock);	449	int res = eio_poll ();
140	req = ress;
141		450
142	if (req)	451	if (res > 0)
143	{
144	ress = req->next;
145
146	if (!ress)
147	{
148	/* read any signals sent by the worker threads */
149	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)
151	;
152
153	rese = 0;
154	}
155	}
156
157	pthread_mutex_unlock (&reslock);
158
159	if (!req)
160	break;
161
162	nreqs--;
163
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);	452	croak (0);
240	}
241	}
242		453
243	LEAVE;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
244		456
245	errno = errorno;	457	poll_wait ();
246	count++;
247	}
248
249	free_req (req);
250	}	458	}
251
252	return count;
253	}	459	}
254		460
255	static void *aio_proc(void *arg);	461	static void atfork_child (void)
256
257	static void
258	start_thread (void)
259	{	462	{
260	sigset_t fullsigset, oldsigset;	463	create_respipe ();
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}	464	}
276		465
277	static void	466	static SV *
278	send_req (aio_req req)	467	get_cb (SV *cb_sv)
279	{	468	{
280	while (started < wanted && nreqs >= started)	469	HV *st;
281	start_thread ();	470	GV *gvp;
		471	CV *cv;
282		472
283	nreqs++;	473	if (!SvOK (cb_sv))
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}
347
348	static void create_pipe ()
349	{
350	if (pipe (respipe))
351	croak ("unable to initialize result pipe");
352
353	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
354	croak ("cannot set result pipe to nonblocking mode");
355
356	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
357	croak ("cannot set result pipe to nonblocking mode");
358	}
359
360	/*****************************************************************************/
361	/* work around various missing functions */
362
363	#if !HAVE_PREADWRITE
364	# define pread aio_pread
365	# define pwrite aio_pwrite
366
367	/*
368	* make our pread/pwrite safe against themselves, but not against
369	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.
371	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374	static ssize_t
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{
377	ssize_t res;
378	off_t ooffset;
379
380	pthread_mutex_lock (&preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);
386
387	return res;
388	}
389
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)
392	{
393	ssize_t res;
394	off_t ooffset;
395
396	pthread_mutex_lock (&preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);
402
403	return res;
404	}
405	#endif
406
407	#if !HAVE_FDATASYNC
408	# define fdatasync fsync
409	#endif
410
411	#if !HAVE_READAHEAD
412	# define readahead aio_readahead
413
414	static ssize_t
415	readahead (int fd, off_t offset, size_t count)
416	{
417	char readahead_buf[4096];
418
419	while (count > 0)
420	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
422
423	pread (fd, readahead_buf, len, offset);
424	offset += len;
425	count -= len;
426	}
427
428	errno = 0;
429	}
430	#endif
431
432	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r
434
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{
440	struct dirent *e;
441	int errorno;
442
443	pthread_mutex_lock (&readdirlock);
444
445	e = readdir (dirp);
446	errorno = errno;
447
448	if (e)
449	{
450	*res = ent;
451	strcpy (ent->d_name, e->d_name);
452	}
453	else
454	*res = 0;
455
456	pthread_mutex_unlock (&readdirlock);
457
458	errno = errorno;
459	return e ? 0 : -1;
460	}
461	#endif
462
463	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466	{
467	ssize_t res;
468
469	if (!count)
470	return 0;	474	return 0;
471		475
472	#if HAVE_SENDFILE	476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
473	# if __linux
474	res = sendfile (ofd, ifd, &offset, count);
475		477
476	# elif __freebsd	478	if (!cv)
477	/*	479	croak ("IO::AIO callback must be undef or a CODE reference");
478	* Of course, the freebsd sendfile is a dire hack with no thoughts
479	* wasted on making it similar to other I/O functions.
480	*/
481	{
482	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484		480
485	if (res < 0 && sbytes)	481	return (SV *)cv;
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487	res = sbytes;
488	}
489
490	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);
492
493	# elif __solaris
494	{
495	struct sendfilevec vec;
496	size_t sbytes;
497
498	vec.sfv_fd = ifd;
499	vec.sfv_flag = 0;
500	vec.sfv_off = offset;
501	vec.sfv_len = count;
502
503	res = sendfilev (ofd, &vec, 1, &sbytes);
504
505	if (res < 0 && sbytes)
506	res = sbytes;
507	}
508
509	# endif
510	#else
511	res = -1;
512	errno = ENOSYS;
513	#endif
514
515	if (res < 0
516	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517	#if __solaris
518	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
519	#endif
520	)
521	)
522	{
523	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];
525	res = 0;
526
527	while (count)
528	{
529	ssize_t cnt;
530
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
532
533	if (cnt <= 0)
534	{
535	if (cnt && !res) res = -1;
536	break;
537	}
538
539	cnt = write (ofd, buf, cnt);
540
541	if (cnt <= 0)
542	{
543	if (cnt && !res) res = -1;
544	break;
545	}
546
547	offset += cnt;
548	res += cnt;
549	count -= cnt;
550	}
551	}
552
553	return res;
554	}
555
556	/* read a full directory */
557	static int
558	scandir_ (const char *path, void **namesp)
559	{
560	DIR *dirp = opendir (path);
561	union
562	{
563	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;
566	struct dirent *entp;
567	char *name, *names;
568	int memlen = 4096;
569	int memofs = 0;
570	int res = 0;
571	int errorno;
572
573	if (!dirp)
574	return -1;
575
576	names = malloc (memlen);
577
578	for (;;)
579	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631
632	for (;;)
633	{
634	req = reqs;
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641
642	if (req)
643	break;
644
645	pthread_cond_wait (&reqwait, &reqlock);
646	}
647
648	pthread_mutex_unlock (&reqlock);
649
650	errno = 0; /* strictly unnecessary */
651
652	type = req->type;
653
654	switch (type)
655	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
671	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
672	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
673
674	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
675	case REQ_FSYNC: req->result = fsync (req->fd); break;
676	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
677
678	case REQ_QUIT:
679	break;
680
681	default:
682	req->result = ENOSYS;
683	break;
684	}
685
686	req->errorno = errno;
687
688	pthread_mutex_lock (&reslock);
689
690	req->next = 0;
691
692	if (rese)
693	{
694	rese->next = req;
695	rese = req;
696	}
697	else
698	{
699	rese = ress = req;
700
701	/* write a dummy byte to the pipe so fh becomes ready */
702	write (respipe [1], &respipe, 1);
703	}
704
705	pthread_mutex_unlock (&reslock);
706	}
707	while (type != REQ_QUIT);
708
709	return 0;
710	}
711
712	/*****************************************************************************/
713
714	static void atfork_prepare (void)
715	{
716	pthread_mutex_lock (&reqlock);
717	pthread_mutex_lock (&reslock);
718	#if !HAVE_PREADWRITE
719	pthread_mutex_lock (&preadwritelock);
720	#endif
721	#if !HAVE_READDIR_R
722	pthread_mutex_lock (&readdirlock);
723	#endif
724	}
725
726	static void atfork_parent (void)
727	{
728	#if !HAVE_READDIR_R
729	pthread_mutex_unlock (&readdirlock);
730	#endif
731	#if !HAVE_PREADWRITE
732	pthread_mutex_unlock (&preadwritelock);
733	#endif
734	pthread_mutex_unlock (&reslock);
735	pthread_mutex_unlock (&reqlock);
736	}
737
738	static void atfork_child (void)
739	{
740	aio_req prv;
741
742	started = 0;
743
744	while (reqs)
745	{
746	prv = reqs;
747	reqs = prv->next;
748	free_req (prv);
749	}
750
751	reqs = reqe = 0;
752
753	while (ress)
754	{
755	prv = ress;
756	ress = prv->next;
757	free_req (prv);
758	}
759
760	ress = rese = 0;
761
762	close (respipe [0]);
763	close (respipe [1]);
764	create_pipe ();
765
766	atfork_parent ();
767	}	482	}
768		483
769	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
770	aio_req req; \	486	aio_req req; \
		487	int req_pri = next_pri; \
		488	next_pri = EIO_PRI_DEFAULT; \
771	\	489	\
772	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
773	croak ("clalback must be undef or of reference type"); \
774	\	491	\
775	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
776	if (!req) \	493	if (!req) \
777	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
778	\	495	\
779	req->callback = newSVsv (callback);	496	req->callback = SvREFCNT_inc (cb_cv); \
		497	req->pri = req_pri
		498
		499	#define REQ_SEND \
		500	PUTBACK; \
		501	req_submit (req); \
		502	SPAGAIN; \
		503	\
		504	if (GIMME_V != G_VOID) \
		505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
780		506
781	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
782		508
783	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
784		510
785	BOOT:	511	BOOT:
786	{	512	{
787	create_pipe ();	513	stash = gv_stashpv ("IO::AIO", 1);
788	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
789	}
790		514
		515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	#endif
		523
		524	create_respipe ();
		525
		526	if (eio_init (want_poll, done_poll) < 0)
		527	croak ("IO::AIO: unable to initialise eio library");
		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
		531	}
		532
791	void	533	void
792	min_parallel (nthreads)	534	max_poll_reqs (int nreqs)
793	int nthreads
794	PROTOTYPE: $	535	PROTOTYPE: $
		536	CODE:
		537	eio_set_max_poll_reqs (nreqs);
795		538
796	void	539	void
797	max_parallel (nthreads)	540	max_poll_time (double nseconds)
798	int nthreads
799	PROTOTYPE: $	541	PROTOTYPE: $
800
801	int
802	max_outstanding (nreqs)
803	int nreqs
804	PROTOTYPE: $
805	CODE:	542	CODE:
806	RETVAL = max_outstanding;	543	eio_set_max_poll_time (nseconds);
		544
		545	void
		546	min_parallel (int nthreads)
		547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
		550
		551	void
		552	max_parallel (int nthreads)
		553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
		556
		557	void
		558	max_idle (int nthreads)
		559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_idle (nthreads);
		562
		563	void
		564	max_outstanding (int maxreqs)
		565	PROTOTYPE: $
		566	CODE:
807	max_outstanding = nreqs;	567	max_outstanding = maxreqs;
808		568
809	void	569	void
810	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
811	SV * pathname
812	int flags
813	int mode
814	SV * callback
815	PROTOTYPE: $$$;$	571	PROTOTYPE: $$$;$
816	CODE:	572	PPCODE:
817	{	573	{
818	dREQ;	574	dREQ;
819		575
820	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
821	req->data = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
822	req->dataptr = SvPVbyte_nolen (req->data);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
823	req->fd = flags;	579	req->int1 = flags;
824	req->mode = mode;	580	req->int2 = mode;
825		581
826	send_req (req);	582	REQ_SEND;
827	}	583	}
828		584
829	void	585	void
830	aio_close (fh,callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
831	SV * fh
832	SV * callback
833	PROTOTYPE: $;$	587	PROTOTYPE: $;$
834	ALIAS:	588	ALIAS:
835	aio_close = REQ_CLOSE
836	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
837	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
838	CODE:	591	PPCODE:
839	{	592	{
840	dREQ;	593	dREQ;
841		594
842	req->type = ix;	595	req->type = ix;
843	req->fh = newSVsv (fh);	596	req->sv1 = newSVsv (fh);
844	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
845		598
846	send_req (req);	599	REQ_SEND (req);
847	}	600	}
848		601
849	void	602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
850	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
851	SV * fh
852	UV offset
853	UV length
854	SV * data
855	UV dataoffset
856	SV * callback
857	ALIAS:	632	ALIAS:
858	aio_read = REQ_READ	633	aio_read = EIO_READ
859	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
860	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
861	CODE:	636	PPCODE:
862	{	637	{
863	aio_req req;
864	STRLEN svlen;	638	STRLEN svlen;
865	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
866		641
867	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
868	SvPOK_on (data);	643	SvPOK_on (data);
869		644
870	if (dataoffset < 0)	645	if (dataoffset < 0)
871	dataoffset += svlen;	646	dataoffset += svlen;
872		647
873	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
874	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
875		650
876	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
877	{	652	{
878	/* write: check length and adjust. */	653	/* write: check length and adjust. */
879	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
880	length = svlen - dataoffset;	655	len = svlen - dataoffset;
881	}	656	}
882	else	657	else
883	{	658	{
884	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
885	svptr = SvGROW (data, length + dataoffset);	660	svptr = SvGROW (data, len + dataoffset + 1);
886	}	661	}
887		662
888	if (length < 0)	663	if (len < 0)
889	croak ("length must not be negative");	664	croak ("length must not be negative");
890		665
891	{	666	{
892	dREQ;	667	dREQ;
893		668
894	req->type = ix;	669	req->type = ix;
895	req->fh = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
896	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
897	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
898	req->offset = offset;	674	req->size = len;
899	req->length = length;
900	req->data = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc_NN (data);
901	req->dataptr = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
		677	req->stroffset = dataoffset;
902		678
903	if (!SvREADONLY (data))	679	if (!SvREADONLY (data))
904	{	680	{
905	SvREADONLY_on (data);	681	SvREADONLY_on (data);
906	req->data2ptr = (void *)data;	682	req->flags |= FLAG_SV2_RO_OFF;
907	}	683	}
908		684
909	send_req (req);	685	REQ_SEND;
910	}	686	}
911	}	687	}
912		688
913	void	689	void
		690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		691	PROTOTYPE: $$;$
		692	PPCODE:
		693	{
		694	SV *data;
		695	dREQ;
		696
		697	req->type = EIO_READLINK;
		698	req->sv1 = newSVsv (path);
		699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		700
		701	REQ_SEND;
		702	}
		703
		704	void
914	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	705	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
915	SV * out_fh
916	SV * in_fh
917	UV in_offset
918	UV length
919	SV * callback
920	PROTOTYPE: $$$$;$	706	PROTOTYPE: $$$$;$
921	CODE:	707	PPCODE:
922	{	708	{
923	dREQ;	709	dREQ;
924		710
925	req->type = REQ_SENDFILE;	711	req->type = EIO_SENDFILE;
926	req->fh = newSVsv (out_fh);	712	req->sv1 = newSVsv (out_fh);
927	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
928	req->fh2 = newSVsv (in_fh);	714	req->sv2 = newSVsv (in_fh);
929	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
930	req->offset = in_offset;	716	req->offs = SvVAL64 (in_offset);
931	req->length = length;	717	req->size = length;
932		718
933	send_req (req);	719	REQ_SEND;
934	}	720	}
935		721
936	void	722	void
937	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
938	SV * fh
939	UV offset
940	IV length
941	SV * callback
942	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
943	CODE:	725	PPCODE:
944	{	726	{
945	dREQ;	727	dREQ;
946		728
947	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
948	req->fh = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
949	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
950	req->offset = offset;	732	req->offs = SvVAL64 (offset);
951	req->length = length;	733	req->size = length;
952		734
953	send_req (req);	735	REQ_SEND;
954	}	736	}
955		737
956	void	738	void
957	aio_stat (fh_or_path,callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
958	SV * fh_or_path
959	SV * callback
960	ALIAS:	740	ALIAS:
961	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
962	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
963	CODE:	743	PPCODE:
964	{	744	{
965	dREQ;	745	dREQ;
966		746
967	New (0, req->statdata, 1, Stat_t);	747	req->sv1 = newSVsv (fh_or_path);
968	if (!req->statdata)
969	{
970	free_req (req);
971	croak ("out of memory during aio_req->statdata allocation");
972	}
973		748
974	if (SvPOK (fh_or_path))	749	if (SvPOK (req->sv1))
975	{	750	{
976	req->type = ix;	751	req->type = ix;
977	req->data = newSVsv (fh_or_path);
978	req->dataptr = SvPVbyte_nolen (req->data);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
979	}	753	}
980	else	754	else
981	{	755	{
982	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
983	req->fh = newSVsv (fh_or_path);
984	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		758	}
		759
		760	REQ_SEND;
		761	}
		762
		763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
985	}	774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
986		783
987	send_req (req);	784	REQ_SEND;
988	}	785	}
989		786
990	void	787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
991	aio_unlink (pathname,callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
992	SV * pathname
993	SV * callback
994	ALIAS:	862	ALIAS:
995	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
996	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
997	aio_readdir = REQ_READDIR	865	aio_readdir = EIO_READDIR
998	CODE:	866	PPCODE:
999	{	867	{
1000	dREQ;	868	dREQ;
1001		869
1002	req->type = ix;	870	req->type = ix;
1003	req->data = newSVsv (pathname);	871	req->sv1 = newSVsv (pathname);
1004	req->dataptr = SvPVbyte_nolen (req->data);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
1005
1006	send_req (req);
1007	}
1008		873
		874	REQ_SEND;
		875	}
		876
1009	void	877	void
1010	aio_link (oldpath,newpath,callback=&PL_sv_undef)	878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1011	SV * oldpath
1012	SV * newpath
1013	SV * callback
1014	ALIAS:	879	ALIAS:
1015	aio_link = REQ_LINK	880	aio_link = EIO_LINK
1016	aio_symlink = REQ_SYMLINK	881	aio_symlink = EIO_SYMLINK
1017	aio_rename = REQ_RENAME	882	aio_rename = EIO_RENAME
1018	CODE:	883	PPCODE:
1019	{	884	{
1020	dREQ;	885	dREQ;
1021		886
1022	req->type = ix;	887	req->type = ix;
1023	req->fh = newSVsv (oldpath);	888	req->sv1 = newSVsv (oldpath);
1024	req->data2ptr = SvPVbyte_nolen (req->fh);	889	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	req->data = newSVsv (newpath);	890	req->sv2 = newSVsv (newpath);
1026	req->dataptr = SvPVbyte_nolen (req->data);	891	req->ptr2 = SvPVbyte_nolen (req->sv2);
1027		892
1028	send_req (req);	893	REQ_SEND;
1029	}	894	}
		895
		896	void
		897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		898	PPCODE:
		899	{
		900	dREQ;
		901
		902	req->type = EIO_MKNOD;
		903	req->sv1 = newSVsv (pathname);
		904	req->ptr1 = SvPVbyte_nolen (req->sv1);
		905	req->int2 = (mode_t)mode;
		906	req->offs = dev;
		907
		908	REQ_SEND;
		909	}
		910
		911	void
		912	aio_busy (double delay, SV *callback=&PL_sv_undef)
		913	PPCODE:
		914	{
		915	dREQ;
		916
		917	req->type = EIO_BUSY;
		918	req->nv1 = delay < 0. ? 0. : delay;
		919
		920	REQ_SEND;
		921	}
		922
		923	void
		924	aio_group (SV *callback=&PL_sv_undef)
		925	PROTOTYPE: ;$
		926	PPCODE:
		927	{
		928	dREQ;
		929
		930	req->type = EIO_GROUP;
		931
		932	req_submit (req);
		933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		934	}
		935
		936	void
		937	aio_nop (SV *callback=&PL_sv_undef)
		938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = ix;
		946
		947	REQ_SEND;
		948	}
		949
		950	int
		951	aioreq_pri (int pri = 0)
		952	PROTOTYPE: ;$
		953	CODE:
		954	RETVAL = next_pri;
		955	if (items > 0)
		956	{
		957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		959	next_pri = pri;
		960	}
		961	OUTPUT:
		962	RETVAL
		963
		964	void
		965	aioreq_nice (int nice = 0)
		966	CODE:
		967	nice = next_pri - nice;
		968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		970	next_pri = nice;
1030		971
1031	void	972	void
1032	flush ()	973	flush ()
1033	PROTOTYPE:	974	PROTOTYPE:
1034	CODE:	975	CODE:
1035	while (nreqs)	976	while (eio_nreqs ())
1036	{	977	{
1037	poll_wait ();	978	poll_wait ();
1038	poll_cb ();	979	poll_cb ();
1039	}	980	}
1040		981
1041	void	982	int
1042	poll()	983	poll()
1043	PROTOTYPE:	984	PROTOTYPE:
1044	CODE:	985	CODE:
1045	if (nreqs)
1046	{
1047	poll_wait ();	986	poll_wait ();
1048	poll_cb ();	987	RETVAL = poll_cb ();
1049	}	988	OUTPUT:
		989	RETVAL
1050		990
1051	int	991	int
1052	poll_fileno()	992	poll_fileno()
1053	PROTOTYPE:	993	PROTOTYPE:
1054	CODE:	994	CODE:
…		…
1066		1006
1067	void	1007	void
1068	poll_wait()	1008	poll_wait()
1069	PROTOTYPE:	1009	PROTOTYPE:
1070	CODE:	1010	CODE:
1071	if (nreqs)
1072	poll_wait ();	1011	poll_wait ();
1073		1012
1074	int	1013	int
1075	nreqs()	1014	nreqs()
1076	PROTOTYPE:	1015	PROTOTYPE:
1077	CODE:	1016	CODE:
1078	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
1079	OUTPUT:	1018	OUTPUT:
1080	RETVAL	1019	RETVAL
1081		1020
		1021	int
		1022	nready()
		1023	PROTOTYPE:
		1024	CODE:
		1025	RETVAL = eio_nready ();
		1026	OUTPUT:
		1027	RETVAL
		1028
		1029	int
		1030	npending()
		1031	PROTOTYPE:
		1032	CODE:
		1033	RETVAL = eio_npending ();
		1034	OUTPUT:
		1035	RETVAL
		1036
		1037	int
		1038	nthreads()
		1039	PROTOTYPE:
		1040	CODE:
		1041	RETVAL = eio_nthreads ();
		1042	OUTPUT:
		1043	RETVAL
		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
		1050	PROTOTYPES: DISABLE
		1051
		1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1053
		1054	void
		1055	cancel (aio_req_ornot req)
		1056	CODE:
		1057	eio_cancel (req);
		1058
		1059	void
		1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
		1070	SvREFCNT_dec (req->callback);
		1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
		1074
		1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1076
		1077	void
		1078	add (aio_req grp, ...)
		1079	PPCODE:
		1080	{
		1081	int i;
		1082
		1083	if (grp->int1 == 2)
		1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1085
		1086	for (i = 1; i < items; ++i )
		1087	{
		1088	aio_req req;
		1089
		1090	if (GIMME_V != G_VOID)
		1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1092
		1093	req = SvAIO_REQ (ST (i));
		1094
		1095	if (req)
		1096	eio_grp_add (grp, req);
		1097	}
		1098	}
		1099
		1100	void
		1101	cancel_subs (aio_req_ornot req)
		1102	CODE:
		1103	req_cancel_subs (req);
		1104
		1105	void
		1106	result (aio_req grp, ...)
		1107	CODE:
		1108	{
		1109	int i;
		1110	AV *av;
		1111
		1112	grp->errorno = errno;
		1113
		1114	av = newAV ();
		1115
		1116	for (i = 1; i < items; ++i )
		1117	av_push (av, newSVsv (ST (i)));
		1118
		1119	SvREFCNT_dec (grp->sv1);
		1120	grp->sv1 = (SV *)av;
		1121	}
		1122
		1123	void
		1124	errno (aio_req grp, int errorno = errno)
		1125	CODE:
		1126	grp->errorno = errorno;
		1127
		1128	void
		1129	limit (aio_req grp, int limit)
		1130	CODE:
		1131	eio_grp_limit (grp, limit);
		1132
		1133	void
		1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1135	CODE:
		1136	{
		1137	SvREFCNT_dec (grp->sv2);
		1138	grp->sv2 = newSVsv (callback);
		1139
		1140	if (grp->int2 <= 0)
		1141	grp->int2 = 2;
		1142
		1143	eio_grp_limit (grp, grp->int2);
		1144	}
		1145

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