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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC vs.
Revision 1.121 by root, Tue May 13 18:50:27 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>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	/* perl namespace pollution */
25	# if __linux	19	#undef VERSION
26	# include <sys/sendfile.h>	20
27	# elif __freebsd	21	#ifdef _WIN32
28	# include <sys/socket.h>	22
29	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	24	# undef malloc
31	# include <sys/socket.h>	25	# undef free
32	# elif __solaris /* not yet */	26
33	# 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
34	# else	59	#else
35	# error sendfile support requested but not available	60
36	# 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
37	#endif	68	#endif
38		69
39	/* used for struct dirent, AIX doesn't provide it */	70	#define EIO_STRUCT_STAT Stat_t
40	#ifndef NAME_MAX	71
41	# define NAME_MAX 4096	72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
		75	#else
		76	# define SvVAL64 SvNV
42	#endif	77	#endif
43		78
44	#if __ia64	79	static HV *stash;
45	# define STACKSIZE 65536	80	typedef SV SV8; /* byte-sv, used for argument-checking */
46	#else
47	# define STACKSIZE 8192
48	#endif
49
50	enum {
51	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		81
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		84
67	typedef struct aio_cb	85	#define EIO_REQ_MEMBERS \
68	{
69	struct aio_cb *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;	86	SV *callback; \
76	SV *fh, *fh2;	87	SV *sv1, *sv2; \
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;	88	STRLEN stroffset; \
87	mode_t mode; /* open */	89	SV *self;
88	unsigned char cancelled;
89	} aio_cb;
90		90
		91	#include "libeio/eio.h"
		92
		93	static int req_invoke (eio_req *req);
		94	#define EIO_FINISH(req) req_invoke (req)
		95	static void aio_grp_feed (eio_req *grp);
		96	#define EIO_FEED(req) aio_grp_feed (req)
		97	static void req_destroy (eio_req *grp);
		98	#define EIO_DESTROY(req) req_destroy (req)
		99
		100	enum {
		101	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		102	};
		103
		104	#include "libeio/eio.c"
		105
91	typedef aio_cb *aio_req;	106	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	107	typedef eio_req *aio_req_ornot;
93		108
94	static int started, wanted;	109	static SV *on_next_submit;
95	static volatile int nreqs;	110	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	111	static int max_outstanding;
97	static int respipe [2];
98		112
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	113	static int respipe_osf [2], respipe [2] = { -1, -1 };
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		114
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	115	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	116	static void req_cancel (aio_req req);
		117
		118	static void want_poll (void)
		119	{
		120	/* write a dummy byte to the pipe so fh becomes ready */
		121	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		122	}
		123
		124	static void done_poll (void)
		125	{
		126	/* read any signals sent by the worker threads */
		127	char buf [4];
		128	while (respipe_read (respipe [0], buf, 4) == 4)
		129	;
		130	}
107		131
108	/* must be called at most once */	132	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	133	static SV *req_sv (aio_req req, const char *klass)
110	{	134	{
		135	if (!req->self)
		136	{
111	req->self = (SV *)newHV ();	137	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	138	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		139	}
113		140
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	141	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115	}	142	}
116		143
117	static aio_req SvAIO_REQ (SV *sv)	144	static aio_req SvAIO_REQ (SV *sv)
118	{	145	{
		146	MAGIC *mg;
		147
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	148	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");	149	croak ("object of class " AIO_REQ_KLASS " expected");
121		150
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	151	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123		152
124	return mg ? (aio_req)mg->mg_ptr : 0;	153	return mg ? (aio_req)mg->mg_ptr : 0;
125	}	154	}
126		155
127	static void poll_wait ()	156	static void aio_grp_feed (aio_req grp)
128	{	157	{
129	if (nreqs && !ress)	158	if (grp->sv2 && SvOK (grp->sv2))
130	{	159	{
131	fd_set rfd;	160	dSP;
132	FD_ZERO(&rfd);
133	FD_SET(respipe [0], &rfd);
134		161
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	162	ENTER;
		163	SAVETMPS;
		164	PUSHMARK (SP);
		165	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		166	PUTBACK;
		167	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		168	SPAGAIN;
		169	FREETMPS;
		170	LEAVE;
136	}	171	}
137	}	172	}
138		173
		174	static void req_submit (eio_req *req)
		175	{
		176	eio_submit (req);
		177
		178	if (on_next_submit)
		179	{
		180	dSP;
		181	SV *cb = sv_2mortal (on_next_submit);
		182
		183	on_next_submit = 0;
		184
		185	PUSHMARK (SP);
		186	PUTBACK;
		187	call_sv (cb, G_DISCARD | G_EVAL);
		188	}
		189	}
		190
139	static void req_invoke (aio_req req)	191	static int req_invoke (eio_req *req)
140	{	192	{
141	dSP;	193	dSP;
142	int errorno = errno;
143		194
144	if (req->cancelled || !SvOK (req->callback))	195	if (req->flags & FLAG_SV2_RO_OFF)
145	return;	196	SvREADONLY_off (req->sv2);
146		197
147	errno = req->errorno;	198	if (!EIO_CANCELLED (req) && SvOK (req->callback))
148
149	ENTER;
150	PUSHMARK (SP);
151	EXTEND (SP, 1);
152
153	switch (req->type)
154	{	199	{
155	case REQ_READDIR:	200	ENTER;
		201	SAVETMPS;
		202	PUSHMARK (SP);
		203	EXTEND (SP, 1);
		204
		205	switch (req->type)
156	{	206	{
157	SV *rv = &PL_sv_undef;	207	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	208	{
161	char *buf = req->data2ptr;	209	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		210
164	while (req->result)	211	if (req->result >= 0)
165	{	212	{
		213	int i;
		214	char *buf = req->ptr2;
		215	AV *av = newAV ();
		216
		217	av_extend (av, req->result - 1);
		218
		219	for (i = 0; i < req->result; ++i)
		220	{
166	SV *sv = newSVpv (buf, 0);	221	SV *sv = newSVpv (buf, 0);
167		222
168	av_push (av, sv);	223	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	224	buf += SvCUR (sv) + 1;
170	req->result--;	225	}
		226
		227	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	228	}
172		229
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	230	PUSHs (rv);
174	}	231	}
		232	break;
175		233
		234	case EIO_OPEN:
		235	{
		236	/* convert fd to fh */
		237	SV *fh = &PL_sv_undef;
		238
		239	if (req->result >= 0)
		240	{
		241	GV *gv = (GV *)sv_newmortal ();
		242	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		243	char sym [64];
		244	int symlen;
		245
		246	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		247	gv_init (gv, stash, sym, symlen, 0);
		248
		249	symlen = snprintf (
		250	sym,
		251	sizeof (sym),
		252	"%s&=%d",
		253	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		254	req->result
		255	);
		256
		257	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		258	fh = (SV *)gv;
		259	}
		260
176	PUSHs (rv);	261	PUSHs (fh);
		262	}
		263	break;
		264
		265	case EIO_GROUP:
		266	req->int1 = 2; /* mark group as finished */
		267
		268	if (req->sv1)
		269	{
		270	int i;
		271	AV *av = (AV *)req->sv1;
		272
		273	EXTEND (SP, AvFILL (av) + 1);
		274	for (i = 0; i <= AvFILL (av); ++i)
		275	PUSHs (*av_fetch (av, i, 0));
		276	}
		277	break;
		278
		279	case EIO_NOP:
		280	case EIO_BUSY:
		281	break;
		282
		283	case EIO_READLINK:
		284	if (req->result > 0)
		285	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		286	break;
		287
		288	case EIO_STAT:
		289	case EIO_LSTAT:
		290	case EIO_FSTAT:
		291	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		292	PL_laststatval = req->result;
		293	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		294	PUSHs (sv_2mortal (newSViv (req->result)));
		295	break;
		296
		297	case EIO_READ:
		298	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		299	*SvEND (req->sv2) = 0;
		300	PUSHs (sv_2mortal (newSViv (req->result)));
		301	break;
		302
		303	case EIO_DUP2:
		304	if (req->result > 0)
		305	req->result = 0;
		306	/* FALLTHROUGH */
		307
		308	default:
		309	PUSHs (sv_2mortal (newSViv (req->result)));
		310	break;
177	}	311	}
178	break;
179		312
180	case REQ_OPEN:	313	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		314
185	PUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	315	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	316	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	317	SPAGAIN;
189		318
190	fh = SvREFCNT_inc (POPs);	319	FREETMPS;
		320	LEAVE;
191		321
192	PUSHMARK (SP);	322	PUTBACK;
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_GROUP:
198	if (req->data)
199	{
200	int i;
201	AV *av = (AV *)req->data;
202
203	EXTEND (SP, AvFILL (av) + 1);
204	for (i = 0; i <= AvFILL (av); ++i)
205	PUSHs (*av_fetch (av, i, 0));
206	}
207	break;
208
209	case REQ_SLEEP:
210	break;
211
212	default:
213	PUSHs (sv_2mortal (newSViv (req->result)));
214	break;
215	}	323	}
216		324
217		325	return !!SvTRUE (ERRSV);
218	PUTBACK;
219	call_sv (req->callback, G_VOID | G_EVAL);
220	SPAGAIN;
221
222	if (SvTRUE (ERRSV))
223	{
224	req_free (req);
225	croak (0);
226	}
227
228	LEAVE;
229
230	errno = errorno;
231	}	326	}
232		327
233	static void req_free (aio_req req)	328	static void req_destroy (aio_req req)
234	{	329	{
235	if (req->grp)
236	{
237	aio_req grp = req->grp;
238
239	/* unlink request */
240	req->grp_next->grp_prev = req->grp_prev;
241	req->grp_prev->grp_next = req->grp_next;
242
243	if (grp->grp_next == grp && grp->fd)
244	{
245	req_invoke (grp);
246	req_free (grp);
247	}
248	}
249
250	if (req->self)	330	if (req->self)
251	{	331	{
252	sv_unmagic (req->self, PERL_MAGIC_ext);	332	sv_unmagic (req->self, PERL_MAGIC_ext);
253	SvREFCNT_dec (req->self);	333	SvREFCNT_dec (req->self);
254	}	334	}
255		335
256	if (req->data)
257	SvREFCNT_dec (req->data);
258
259	if (req->fh)
260	SvREFCNT_dec (req->fh);	336	SvREFCNT_dec (req->sv1);
261
262	if (req->fh2)
263	SvREFCNT_dec (req->fh2);	337	SvREFCNT_dec (req->sv2);
264
265	if (req->statdata)
266	Safefree (req->statdata);
267
268	if (req->callback)
269	SvREFCNT_dec (req->callback);	338	SvREFCNT_dec (req->callback);
270
271	if (req->type == REQ_READDIR && req->result >= 0)
272	free (req->data2ptr);
273		339
274	Safefree (req);	340	Safefree (req);
275	}	341	}
276		342
277	static void req_cancel (aio_req req)	343	static void req_cancel_subs (aio_req grp)
278	{	344	{
279	req->cancelled = 1;	345	aio_req sub;
280		346
281	if (req->type == REQ_GROUP)	347	if (grp->type != EIO_GROUP)
		348	return;
		349
		350	SvREFCNT_dec (grp->sv2);
		351	grp->sv2 = 0;
		352
		353	eio_grp_cancel (grp);
		354	}
		355
		356	#ifdef USE_SOCKETS_AS_HANDLES
		357	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		358	#else
		359	# define TO_SOCKET(x) (x)
		360	#endif
		361
		362	static void
		363	create_respipe (void)
		364	{
		365	int old_readfd = respipe [0];
		366
		367	if (respipe [1] >= 0)
		368	respipe_close (TO_SOCKET (respipe [1]));
		369
		370	#ifdef _WIN32
		371	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		372	#else
		373	if (pipe (respipe))
		374	#endif
		375	croak ("unable to initialize result pipe");
		376
		377	if (old_readfd >= 0)
282	{	378	{
283	aio_req sub;	379	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		380	croak ("unable to initialize result pipe(2)");
284		381
285	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	382	respipe_close (respipe [0]);
286	req_cancel (sub);	383	respipe [0] = old_readfd;
287	}	384	}
288	}
289		385
290	static int poll_cb ()	386	#ifdef _WIN32
291	{	387	int arg = 1;
292	dSP;	388	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
293	int count = 0;	389	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
294	int do_croak = 0;	390	#else
295	aio_req req;	391	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		392	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		393	#endif
		394	croak ("unable to initialize result pipe(3)");
296		395
297	for (;;)	396	respipe_osf [0] = TO_SOCKET (respipe [0]);
		397	respipe_osf [1] = TO_SOCKET (respipe [1]);
		398	}
		399
		400	static void poll_wait (void)
		401	{
		402	fd_set rfd;
		403
		404	while (eio_nreqs ())
298	{	405	{
299	pthread_mutex_lock (&reslock);	406	int size;
300	req = ress;
301		407
		408	X_LOCK (reslock);
		409	size = res_queue.size;
		410	X_UNLOCK (reslock);
		411
302	if (req)	412	if (size)
303	{
304	ress = req->next;
305
306	if (!ress)
307	{
308	/* read any signals sent by the worker threads */
309	char buf [32];
310	while (read (respipe [0], buf, 32) == 32)
311	;
312
313	rese = 0;
314	}
315	}
316
317	pthread_mutex_unlock (&reslock);
318
319	if (!req)
320	break;	413	return;
321		414
322	nreqs--;	415	maybe_start_thread ();
323		416
324	if (req->type == REQ_QUIT)	417	FD_ZERO (&rfd);
325	started--;	418	FD_SET (respipe [0], &rfd);
326	else if (req->type == REQ_GROUP && req->grp_next != req)
327	{
328	req->fd = 1; /* mark request as delayed */
329	continue;
330	}
331	else
332	{
333	if (req->type == REQ_READ)
334	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
335		419
336	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	420	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
337	SvREADONLY_off (req->data);
338
339	if (req->statdata)
340	{
341	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
342	PL_laststatval = req->result;
343	PL_statcache = *(req->statdata);
344	}
345
346	req_invoke (req);
347
348	count++;
349	}
350
351	req_free (req);
352	}	421	}
353
354	return count;
355	}	422	}
356		423
357	static void *aio_proc(void *arg);	424	static int poll_cb (void)
358
359	static void start_thread (void)
360	{	425	{
361	sigset_t fullsigset, oldsigset;	426	int res;
362	pthread_t tid;
363	pthread_attr_t attr;
364		427
365	pthread_attr_init (&attr);	428	do
366	pthread_attr_setstacksize (&attr, STACKSIZE);
367	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
368
369	sigfillset (&fullsigset);
370	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
371
372	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
373	started++;
374
375	sigprocmask (SIG_SETMASK, &oldsigset, 0);
376	}
377
378	static void req_send (aio_req req)
379	{
380	while (started < wanted && nreqs >= started)
381	start_thread ();
382
383	nreqs++;
384
385	pthread_mutex_lock (&reqlock);
386
387	req->next = 0;
388
389	if (reqe)
390	{	429	{
391	reqe->next = req;	430	res = eio_poll ();
392	reqe = req;	431
		432	if (res > 0)
		433	croak (0);
393	}	434	}
394	else	435	while (max_outstanding && max_outstanding <= eio_nreqs ());
395	reqe = reqs = req;
396
397	pthread_cond_signal (&reqwait);
398	pthread_mutex_unlock (&reqlock);
399
400	if (nreqs > max_outstanding)
401	for (;;)
402	{
403	poll_cb ();
404
405	if (nreqs <= max_outstanding)
406	break;
407
408	poll_wait ();
409	}
410	}
411
412	static void end_thread (void)
413	{
414	aio_req req;
415	Newz (0, req, 1, aio_cb);
416	req->type = REQ_QUIT;
417
418	req_send (req);
419	}
420
421	static void min_parallel (int nthreads)
422	{
423	if (wanted < nthreads)
424	wanted = nthreads;
425	}
426
427	static void max_parallel (int nthreads)
428	{
429	int cur = started;
430
431	if (wanted > nthreads)
432	wanted = nthreads;
433
434	while (cur > wanted)
435	{
436	end_thread ();
437	cur--;
438	}
439
440	while (started > wanted)
441	{
442	poll_wait ();
443	poll_cb ();
444	}
445	}
446
447	static void create_pipe ()
448	{
449	if (pipe (respipe))
450	croak ("unable to initialize result pipe");
451
452	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
453	croak ("cannot set result pipe to nonblocking mode");
454
455	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
456	croak ("cannot set result pipe to nonblocking mode");
457	}
458
459	/*****************************************************************************/
460	/* work around various missing functions */
461
462	#if !HAVE_PREADWRITE
463	# define pread aio_pread
464	# define pwrite aio_pwrite
465
466	/*
467	* make our pread/pwrite safe against themselves, but not against
468	* normal read/write by using a mutex. slows down execution a lot,
469	* but that's your problem, not mine.
470	*/
471	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
472
473	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
474	{
475	ssize_t res;
476	off_t ooffset;
477
478	pthread_mutex_lock (&preadwritelock);
479	ooffset = lseek (fd, 0, SEEK_CUR);
480	lseek (fd, offset, SEEK_SET);
481	res = read (fd, buf, count);
482	lseek (fd, ooffset, SEEK_SET);
483	pthread_mutex_unlock (&preadwritelock);
484		436
485	return res;	437	return res;
486	}	438	}
487		439
488	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
489	{
490	ssize_t res;
491	off_t ooffset;
492
493	pthread_mutex_lock (&preadwritelock);
494	ooffset = lseek (fd, 0, SEEK_CUR);
495	lseek (fd, offset, SEEK_SET);
496	res = write (fd, buf, count);
497	lseek (fd, offset, SEEK_SET);
498	pthread_mutex_unlock (&preadwritelock);
499
500	return res;
501	}
502	#endif
503
504	#if !HAVE_FDATASYNC
505	# define fdatasync fsync
506	#endif
507
508	#if !HAVE_READAHEAD
509	# define readahead aio_readahead
510
511	static ssize_t readahead (int fd, off_t offset, size_t count)
512	{
513	char readahead_buf[4096];
514
515	while (count > 0)
516	{
517	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
518
519	pread (fd, readahead_buf, len, offset);
520	offset += len;
521	count -= len;
522	}
523
524	errno = 0;
525	}
526	#endif
527
528	#if !HAVE_READDIR_R
529	# define readdir_r aio_readdir_r
530
531	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
532
533	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
534	{
535	struct dirent *e;
536	int errorno;
537
538	pthread_mutex_lock (&readdirlock);
539
540	e = readdir (dirp);
541	errorno = errno;
542
543	if (e)
544	{
545	*res = ent;
546	strcpy (ent->d_name, e->d_name);
547	}
548	else
549	*res = 0;
550
551	pthread_mutex_unlock (&readdirlock);
552
553	errno = errorno;
554	return e ? 0 : -1;
555	}
556	#endif
557
558	/* sendfile always needs emulation */
559	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
560	{
561	ssize_t res;
562
563	if (!count)
564	return 0;
565
566	#if HAVE_SENDFILE
567	# if __linux
568	res = sendfile (ofd, ifd, &offset, count);
569
570	# elif __freebsd
571	/*
572	* Of course, the freebsd sendfile is a dire hack with no thoughts
573	* wasted on making it similar to other I/O functions.
574	*/
575	{
576	off_t sbytes;
577	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
578
579	if (res < 0 && sbytes)
580	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
581	res = sbytes;
582	}
583
584	# elif __hpux
585	res = sendfile (ofd, ifd, offset, count, 0, 0);
586
587	# elif __solaris
588	{
589	struct sendfilevec vec;
590	size_t sbytes;
591
592	vec.sfv_fd = ifd;
593	vec.sfv_flag = 0;
594	vec.sfv_off = offset;
595	vec.sfv_len = count;
596
597	res = sendfilev (ofd, &vec, 1, &sbytes);
598
599	if (res < 0 && sbytes)
600	res = sbytes;
601	}
602
603	# endif
604	#else
605	res = -1;
606	errno = ENOSYS;
607	#endif
608
609	if (res < 0
610	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
611	#if __solaris
612	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
613	#endif
614	)
615	)
616	{
617	/* emulate sendfile. this is a major pain in the ass */
618	char buf[4096];
619	res = 0;
620
621	while (count)
622	{
623	ssize_t cnt;
624
625	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
626
627	if (cnt <= 0)
628	{
629	if (cnt && !res) res = -1;
630	break;
631	}
632
633	cnt = write (ofd, buf, cnt);
634
635	if (cnt <= 0)
636	{
637	if (cnt && !res) res = -1;
638	break;
639	}
640
641	offset += cnt;
642	res += cnt;
643	count -= cnt;
644	}
645	}
646
647	return res;
648	}
649
650	/* read a full directory */
651	static int scandir_ (const char *path, void **namesp)
652	{
653	DIR *dirp = opendir (path);
654	union
655	{
656	struct dirent d;
657	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
658	} u;
659	struct dirent *entp;
660	char *name, *names;
661	int memlen = 4096;
662	int memofs = 0;
663	int res = 0;
664	int errorno;
665
666	if (!dirp)
667	return -1;
668
669	names = malloc (memlen);
670
671	for (;;)
672	{
673	errno = 0, readdir_r (dirp, &u.d, &entp);
674
675	if (!entp)
676	break;
677
678	name = entp->d_name;
679
680	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
681	{
682	int len = strlen (name) + 1;
683
684	res++;
685
686	while (memofs + len > memlen)
687	{
688	memlen *= 2;
689	names = realloc (names, memlen);
690	if (!names)
691	break;
692	}
693
694	memcpy (names + memofs, name, len);
695	memofs += len;
696	}
697	}
698
699	errorno = errno;
700	closedir (dirp);
701
702	if (errorno)
703	{
704	free (names);
705	errno = errorno;
706	res = -1;
707	}
708
709	*namesp = (void *)names;
710	return res;
711	}
712
713	/*****************************************************************************/
714
715	static void *aio_proc (void *thr_arg)
716	{
717	aio_req req;
718	int type;
719
720	do
721	{
722	pthread_mutex_lock (&reqlock);
723
724	for (;;)
725	{
726	req = reqs;
727
728	if (reqs)
729	{
730	reqs = reqs->next;
731	if (!reqs) reqe = 0;
732	}
733
734	if (req)
735	break;
736
737	pthread_cond_wait (&reqwait, &reqlock);
738	}
739
740	pthread_mutex_unlock (&reqlock);
741
742	errno = 0; /* strictly unnecessary */
743
744	if (!req->cancelled)
745	switch (req->type)
746	{
747	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
748	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
749
750	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
751	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
752
753	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
754	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
755	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
756
757	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
758	case REQ_CLOSE: req->result = close (req->fd); break;
759	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
760	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
761	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
762	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
763	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
764
765	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
766	case REQ_FSYNC: req->result = fsync (req->fd); break;
767	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
768
769	case REQ_SLEEP:
770	{
771	struct timeval tv;
772
773	tv.tv_sec = req->fd;
774	tv.tv_usec = req->fd2;
775
776	req->result = select (0, 0, 0, 0, &tv);
777	}
778
779	case REQ_QUIT:
780	break;
781
782	default:
783	req->result = ENOSYS;
784	break;
785	}
786
787	req->errorno = errno;
788
789	pthread_mutex_lock (&reslock);
790
791	req->next = 0;
792
793	if (rese)
794	{
795	rese->next = req;
796	rese = req;
797	}
798	else
799	{
800	rese = ress = req;
801
802	/* write a dummy byte to the pipe so fh becomes ready */
803	write (respipe [1], &respipe, 1);
804	}
805
806	pthread_mutex_unlock (&reslock);
807	}
808	while (type != REQ_QUIT);
809
810	return 0;
811	}
812
813	/*****************************************************************************/
814
815	static void atfork_prepare (void)
816	{
817	pthread_mutex_lock (&reqlock);
818	pthread_mutex_lock (&reslock);
819	#if !HAVE_PREADWRITE
820	pthread_mutex_lock (&preadwritelock);
821	#endif
822	#if !HAVE_READDIR_R
823	pthread_mutex_lock (&readdirlock);
824	#endif
825	}
826
827	static void atfork_parent (void)
828	{
829	#if !HAVE_READDIR_R
830	pthread_mutex_unlock (&readdirlock);
831	#endif
832	#if !HAVE_PREADWRITE
833	pthread_mutex_unlock (&preadwritelock);
834	#endif
835	pthread_mutex_unlock (&reslock);
836	pthread_mutex_unlock (&reqlock);
837	}
838
839	static void atfork_child (void)	440	static void atfork_child (void)
840	{	441	{
841	aio_req prv;
842
843	started = 0;
844
845	while (reqs)
846	{
847	prv = reqs;
848	reqs = prv->next;
849	req_free (prv);
850	}
851
852	reqs = reqe = 0;
853
854	while (ress)
855	{
856	prv = ress;
857	ress = prv->next;
858	req_free (prv);
859	}
860
861	ress = rese = 0;
862
863	close (respipe [0]);
864	close (respipe [1]);
865	create_pipe ();	442	create_respipe ();
866
867	atfork_parent ();
868	}	443	}
869		444
870	#define dREQ \	445	#define dREQ \
871	aio_req req; \	446	aio_req req; \
		447	int req_pri = next_pri; \
		448	next_pri = EIO_PRI_DEFAULT; \
872	\	449	\
873	if (SvOK (callback) && !SvROK (callback)) \	450	if (SvOK (callback) && !SvROK (callback)) \
874	croak ("callback must be undef or of reference type"); \	451	croak ("callback must be undef or of reference type"); \
875	\	452	\
876	Newz (0, req, 1, aio_cb); \	453	Newz (0, req, 1, eio_req); \
877	if (!req) \	454	if (!req) \
878	croak ("out of memory during aio_req allocation"); \	455	croak ("out of memory during eio_req allocation"); \
879	\	456	\
880	req->callback = newSVsv (callback)	457	req->callback = newSVsv (callback); \
		458	req->pri = req_pri
881		459
882	#define REQ_SEND \	460	#define REQ_SEND \
883	req_send (req); \	461	req_submit (req); \
884	\	462	\
885	if (GIMME_V != G_VOID) \	463	if (GIMME_V != G_VOID) \
886	XPUSHs (req_sv (req, AIO_REQ_KLASS));	464	XPUSHs (req_sv (req, AIO_REQ_KLASS));
887		465
888	MODULE = IO::AIO PACKAGE = IO::AIO	466	MODULE = IO::AIO PACKAGE = IO::AIO
889		467
890	PROTOTYPES: ENABLE	468	PROTOTYPES: ENABLE
891		469
892	BOOT:	470	BOOT:
893	{	471	{
894	HV *stash = gv_stashpv ("IO::AIO", 1);	472	stash = gv_stashpv ("IO::AIO", 1);
		473
895	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	474	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	475	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	476	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		477	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		478	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		479	#ifdef _WIN32
		480	X_MUTEX_CHECK (wrklock);
		481	X_MUTEX_CHECK (reslock);
		482	X_MUTEX_CHECK (reqlock);
		483	X_MUTEX_CHECK (reqwait);
		484	X_MUTEX_CHECK (preadwritelock);
		485	X_MUTEX_CHECK (readdirlock);
898		486
899	create_pipe ();	487	X_COND_CHECK (reqwait);
900	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	488	#else
901	}	489	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		490	#endif
902		491
		492	create_respipe ();
		493
		494	if (eio_init (want_poll, done_poll) < 0)
		495	croak ("IO::AIO: unable to initialise eio library");
		496
		497	/* atfork child called in fifo order, so before eio's handler */
		498	X_THREAD_ATFORK (0, 0, atfork_child);
		499	}
		500
903	void	501	void
904	min_parallel (nthreads)	502	max_poll_reqs (int nreqs)
905	int nthreads
906	PROTOTYPE: $	503	PROTOTYPE: $
		504	CODE:
		505	eio_set_max_poll_reqs (nreqs);
907		506
908	void	507	void
909	max_parallel (nthreads)	508	max_poll_time (double nseconds)
910	int nthreads
911	PROTOTYPE: $	509	PROTOTYPE: $
912
913	int
914	max_outstanding (nreqs)
915	int nreqs
916	PROTOTYPE: $
917	CODE:	510	CODE:
918	RETVAL = max_outstanding;	511	eio_set_max_poll_time (nseconds);
		512
		513	void
		514	min_parallel (int nthreads)
		515	PROTOTYPE: $
		516	CODE:
		517	eio_set_min_parallel (nthreads);
		518
		519	void
		520	max_parallel (int nthreads)
		521	PROTOTYPE: $
		522	CODE:
		523	eio_set_max_parallel (nthreads);
		524
		525	void
		526	max_idle (int nthreads)
		527	PROTOTYPE: $
		528	CODE:
		529	eio_set_max_idle (nthreads);
		530
		531	void
		532	max_outstanding (int maxreqs)
		533	PROTOTYPE: $
		534	CODE:
919	max_outstanding = nreqs;	535	max_outstanding = maxreqs;
920		536
921	void	537	void
922	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	538	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
923	SV * pathname
924	int flags
925	int mode
926	SV * callback
927	PROTOTYPE: $$$;$	539	PROTOTYPE: $$$;$
928	PPCODE:	540	PPCODE:
929	{	541	{
930	dREQ;	542	dREQ;
931		543
932	req->type = REQ_OPEN;	544	req->type = EIO_OPEN;
933	req->data = newSVsv (pathname);	545	req->sv1 = newSVsv (pathname);
934	req->dataptr = SvPVbyte_nolen (req->data);	546	req->ptr1 = SvPVbyte_nolen (req->sv1);
935	req->fd = flags;	547	req->int1 = flags;
936	req->mode = mode;	548	req->int2 = mode;
937		549
938	REQ_SEND;	550	REQ_SEND;
939	}	551	}
940		552
941	void	553	void
942	aio_close (fh,callback=&PL_sv_undef)	554	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
943	SV * fh
944	SV * callback
945	PROTOTYPE: $;$	555	PROTOTYPE: $;$
946	ALIAS:	556	ALIAS:
947	aio_close = REQ_CLOSE
948	aio_fsync = REQ_FSYNC	557	aio_fsync = EIO_FSYNC
949	aio_fdatasync = REQ_FDATASYNC	558	aio_fdatasync = EIO_FDATASYNC
950	PPCODE:	559	PPCODE:
951	{	560	{
952	dREQ;	561	dREQ;
953		562
954	req->type = ix;	563	req->type = ix;
955	req->fh = newSVsv (fh);	564	req->sv1 = newSVsv (fh);
956	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	565	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
957		566
958	REQ_SEND (req);	567	REQ_SEND (req);
959	}	568	}
960		569
961	void	570	void
		571	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		572	PROTOTYPE: $;$
		573	PPCODE:
		574	{
		575	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		576	dREQ;
		577
		578	if (close_pipe < 0)
		579	{
		580	int pipefd [2];
		581
		582	if (pipe (pipefd) < 0
		583	|| close (pipefd [1]) < 0
		584	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		585	abort (); /*D*/
		586
		587	close_pipe = pipefd [0];
		588	}
		589
		590	req->type = EIO_DUP2;
		591	req->int1 = close_pipe;
		592	req->sv2 = newSVsv (fh);
		593	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		594
		595	REQ_SEND (req);
		596	}
		597
		598	void
962	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	599	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
963	SV * fh
964	UV offset
965	UV length
966	SV * data
967	UV dataoffset
968	SV * callback
969	ALIAS:	600	ALIAS:
970	aio_read = REQ_READ	601	aio_read = EIO_READ
971	aio_write = REQ_WRITE	602	aio_write = EIO_WRITE
972	PROTOTYPE: $$$$$;$	603	PROTOTYPE: $$$$$;$
973	PPCODE:	604	PPCODE:
974	{	605	{
975	aio_req req;
976	STRLEN svlen;	606	STRLEN svlen;
977	char *svptr = SvPVbyte (data, svlen);	607	char *svptr = SvPVbyte (data, svlen);
		608	UV len = SvUV (length);
978		609
979	SvUPGRADE (data, SVt_PV);	610	SvUPGRADE (data, SVt_PV);
980	SvPOK_on (data);	611	SvPOK_on (data);
981		612
982	if (dataoffset < 0)	613	if (dataoffset < 0)
983	dataoffset += svlen;	614	dataoffset += svlen;
984		615
985	if (dataoffset < 0 || dataoffset > svlen)	616	if (dataoffset < 0 || dataoffset > svlen)
986	croak ("data offset outside of string");	617	croak ("dataoffset outside of data scalar");
987		618
988	if (ix == REQ_WRITE)	619	if (ix == EIO_WRITE)
989	{	620	{
990	/* write: check length and adjust. */	621	/* write: check length and adjust. */
991	if (length < 0 || length + dataoffset > svlen)	622	if (!SvOK (length) || len + dataoffset > svlen)
992	length = svlen - dataoffset;	623	len = svlen - dataoffset;
993	}	624	}
994	else	625	else
995	{	626	{
996	/* read: grow scalar as necessary */	627	/* read: grow scalar as necessary */
997	svptr = SvGROW (data, length + dataoffset);	628	svptr = SvGROW (data, len + dataoffset + 1);
998	}	629	}
999		630
1000	if (length < 0)	631	if (len < 0)
1001	croak ("length must not be negative");	632	croak ("length must not be negative");
1002		633
1003	{	634	{
1004	dREQ;	635	dREQ;
1005		636
1006	req->type = ix;	637	req->type = ix;
1007	req->fh = newSVsv (fh);	638	req->sv1 = newSVsv (fh);
1008	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	639	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1009	: IoOFP (sv_2io (fh)));	640	: IoOFP (sv_2io (fh)));
		641	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1010	req->offset = offset;	642	req->size = len;
1011	req->length = length;
1012	req->data = SvREFCNT_inc (data);	643	req->sv2 = SvREFCNT_inc (data);
1013	req->dataptr = (char *)svptr + dataoffset;	644	req->ptr2 = (char *)svptr + dataoffset;
		645	req->stroffset = dataoffset;
1014		646
1015	if (!SvREADONLY (data))	647	if (!SvREADONLY (data))
1016	{	648	{
1017	SvREADONLY_on (data);	649	SvREADONLY_on (data);
1018	req->data2ptr = (void *)data;	650	req->flags |= FLAG_SV2_RO_OFF;
1019	}	651	}
1020		652
1021	REQ_SEND;	653	REQ_SEND;
1022	}	654	}
1023	}	655	}
1024		656
1025	void	657	void
		658	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		659	PROTOTYPE: $$;$
		660	PPCODE:
		661	{
		662	SV *data;
		663	dREQ;
		664
		665	req->type = EIO_READLINK;
		666	req->sv1 = newSVsv (path);
		667	req->ptr1 = SvPVbyte_nolen (req->sv1);
		668
		669	REQ_SEND;
		670	}
		671
		672	void
1026	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	673	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1027	SV * out_fh
1028	SV * in_fh
1029	UV in_offset
1030	UV length
1031	SV * callback
1032	PROTOTYPE: $$$$;$	674	PROTOTYPE: $$$$;$
1033	PPCODE:	675	PPCODE:
1034	{	676	{
1035	dREQ;	677	dREQ;
1036		678
1037	req->type = REQ_SENDFILE;	679	req->type = EIO_SENDFILE;
1038	req->fh = newSVsv (out_fh);	680	req->sv1 = newSVsv (out_fh);
1039	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	681	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1040	req->fh2 = newSVsv (in_fh);	682	req->sv2 = newSVsv (in_fh);
1041	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	683	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1042	req->offset = in_offset;	684	req->offs = SvVAL64 (in_offset);
1043	req->length = length;	685	req->size = length;
1044		686
1045	REQ_SEND;	687	REQ_SEND;
1046	}	688	}
1047		689
1048	void	690	void
1049	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	691	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1050	SV * fh
1051	UV offset
1052	IV length
1053	SV * callback
1054	PROTOTYPE: $$$;$	692	PROTOTYPE: $$$;$
1055	PPCODE:	693	PPCODE:
1056	{	694	{
1057	dREQ;	695	dREQ;
1058		696
1059	req->type = REQ_READAHEAD;	697	req->type = EIO_READAHEAD;
1060	req->fh = newSVsv (fh);	698	req->sv1 = newSVsv (fh);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	699	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1062	req->offset = offset;	700	req->offs = SvVAL64 (offset);
1063	req->length = length;	701	req->size = length;
1064		702
1065	REQ_SEND;	703	REQ_SEND;
1066	}	704	}
1067		705
1068	void	706	void
1069	aio_stat (fh_or_path,callback=&PL_sv_undef)	707	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1070	SV * fh_or_path
1071	SV * callback
1072	ALIAS:	708	ALIAS:
1073	aio_stat = REQ_STAT	709	aio_stat = EIO_STAT
1074	aio_lstat = REQ_LSTAT	710	aio_lstat = EIO_LSTAT
1075	PPCODE:	711	PPCODE:
1076	{	712	{
1077	dREQ;	713	dREQ;
1078		714
1079	New (0, req->statdata, 1, Stat_t);	715	req->sv1 = newSVsv (fh_or_path);
1080	if (!req->statdata)
1081	{
1082	req_free (req);
1083	croak ("out of memory during aio_req->statdata allocation");
1084	}
1085		716
1086	if (SvPOK (fh_or_path))	717	if (SvPOK (req->sv1))
1087	{	718	{
1088	req->type = ix;	719	req->type = ix;
1089	req->data = newSVsv (fh_or_path);
1090	req->dataptr = SvPVbyte_nolen (req->data);	720	req->ptr1 = SvPVbyte_nolen (req->sv1);
1091	}	721	}
1092	else	722	else
1093	{	723	{
1094	req->type = REQ_FSTAT;	724	req->type = EIO_FSTAT;
1095	req->fh = newSVsv (fh_or_path);
1096	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	725	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1097	}	726	}
1098		727
1099	REQ_SEND;	728	REQ_SEND;
1100	}	729	}
1101		730
1102	void	731	void
		732	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		733	PPCODE:
		734	{
		735	dREQ;
		736
		737	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		738	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		739	req->sv1 = newSVsv (fh_or_path);
		740
		741	if (SvPOK (req->sv1))
		742	{
		743	req->type = EIO_UTIME;
		744	req->ptr1 = SvPVbyte_nolen (req->sv1);
		745	}
		746	else
		747	{
		748	req->type = EIO_FUTIME;
		749	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		750	}
		751
		752	REQ_SEND;
		753	}
		754
		755	void
		756	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		757	PPCODE:
		758	{
		759	dREQ;
		760
		761	req->sv1 = newSVsv (fh_or_path);
		762	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		763
		764	if (SvPOK (req->sv1))
		765	{
		766	req->type = EIO_TRUNCATE;
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768	}
		769	else
		770	{
		771	req->type = EIO_FTRUNCATE;
		772	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		773	}
		774
		775	REQ_SEND;
		776	}
		777
		778	void
		779	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		780	ALIAS:
		781	aio_chmod = EIO_CHMOD
		782	aio_mkdir = EIO_MKDIR
		783	PPCODE:
		784	{
		785	dREQ;
		786
		787	req->int2 = mode;
		788	req->sv1 = newSVsv (fh_or_path);
		789
		790	if (SvPOK (req->sv1))
		791	{
		792	req->type = ix;
		793	req->ptr1 = SvPVbyte_nolen (req->sv1);
		794	}
		795	else
		796	{
		797	req->type = EIO_FCHMOD;
		798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		799	}
		800
		801	REQ_SEND;
		802	}
		803
		804	void
		805	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		811	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
		815	{
		816	req->type = EIO_CHOWN;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FCHOWN;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
		824
		825	REQ_SEND;
		826	}
		827
		828	void
1103	aio_unlink (pathname,callback=&PL_sv_undef)	829	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1104	SV * pathname
1105	SV * callback
1106	ALIAS:	830	ALIAS:
1107	aio_unlink = REQ_UNLINK	831	aio_unlink = EIO_UNLINK
1108	aio_rmdir = REQ_RMDIR	832	aio_rmdir = EIO_RMDIR
1109	aio_readdir = REQ_READDIR	833	aio_readdir = EIO_READDIR
1110	PPCODE:	834	PPCODE:
1111	{	835	{
1112	dREQ;	836	dREQ;
1113		837
1114	req->type = ix;	838	req->type = ix;
1115	req->data = newSVsv (pathname);	839	req->sv1 = newSVsv (pathname);
1116	req->dataptr = SvPVbyte_nolen (req->data);	840	req->ptr1 = SvPVbyte_nolen (req->sv1);
		841
		842	REQ_SEND;
		843	}
		844
		845	void
		846	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		847	ALIAS:
		848	aio_link = EIO_LINK
		849	aio_symlink = EIO_SYMLINK
		850	aio_rename = EIO_RENAME
		851	PPCODE:
		852	{
		853	dREQ;
		854
		855	req->type = ix;
		856	req->sv1 = newSVsv (oldpath);
		857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858	req->sv2 = newSVsv (newpath);
		859	req->ptr2 = SvPVbyte_nolen (req->sv2);
1117		860
1118	REQ_SEND;	861	REQ_SEND;
1119	}	862	}
1120		863
1121	void	864	void
1122	aio_link (oldpath,newpath,callback=&PL_sv_undef)	865	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1123	SV * oldpath
1124	SV * newpath
1125	SV * callback
1126	ALIAS:
1127	aio_link = REQ_LINK
1128	aio_symlink = REQ_SYMLINK
1129	aio_rename = REQ_RENAME
1130	PPCODE:	866	PPCODE:
1131	{	867	{
1132	dREQ;	868	dREQ;
1133		869
1134	req->type = ix;	870	req->type = EIO_MKNOD;
1135	req->fh = newSVsv (oldpath);	871	req->sv1 = newSVsv (pathname);
1136	req->data2ptr = SvPVbyte_nolen (req->fh);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	req->data = newSVsv (newpath);	873	req->int2 = (mode_t)mode;
1138	req->dataptr = SvPVbyte_nolen (req->data);	874	req->offs = dev;
1139		875
1140	REQ_SEND;	876	REQ_SEND;
1141	}	877	}
1142		878
1143	void	879	void
1144	aio_sleep (delay,callback=&PL_sv_undef)	880	aio_busy (double delay, SV *callback=&PL_sv_undef)
1145	double delay
1146	SV * callback
1147	PPCODE:	881	PPCODE:
1148	{	882	{
1149	dREQ;	883	dREQ;
1150		884
1151	req->type = REQ_SLEEP;	885	req->type = EIO_BUSY;
1152	req->fd = delay < 0. ? 0 : delay;	886	req->nv1 = delay < 0. ? 0. : delay;
1153	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154		887
1155	REQ_SEND;	888	REQ_SEND;
1156	}	889	}
1157		890
1158	void	891	void
1159	aio_group (callback=&PL_sv_undef)	892	aio_group (SV *callback=&PL_sv_undef)
1160	SV * callback
1161	PROTOTYPE: ;$	893	PROTOTYPE: ;$
1162	PPCODE:	894	PPCODE:
1163	{	895	{
1164	dREQ;	896	dREQ;
		897
1165	req->type = REQ_GROUP;	898	req->type = EIO_GROUP;
1166	req->grp_next = req;
1167	req->grp_prev = req;
1168		899
1169	req_send (req);	900	eio_submit (req);
1170	XPUSHs (req_sv (req, AIO_GRP_KLASS));	901	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171	}	902	}
		903
		904	void
		905	aio_nop (SV *callback=&PL_sv_undef)
		906	ALIAS:
		907	aio_nop = EIO_NOP
		908	aio_sync = EIO_SYNC
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->type = ix;
		914
		915	REQ_SEND;
		916	}
		917
		918	int
		919	aioreq_pri (int pri = 0)
		920	PROTOTYPE: ;$
		921	CODE:
		922	RETVAL = next_pri;
		923	if (items > 0)
		924	{
		925	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		926	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		927	next_pri = pri;
		928	}
		929	OUTPUT:
		930	RETVAL
		931
		932	void
		933	aioreq_nice (int nice = 0)
		934	CODE:
		935	nice = next_pri - nice;
		936	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		937	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		938	next_pri = nice;
1172		939
1173	void	940	void
1174	flush ()	941	flush ()
1175	PROTOTYPE:	942	PROTOTYPE:
1176	CODE:	943	CODE:
1177	while (nreqs)	944	while (eio_nreqs ())
1178	{	945	{
1179	poll_wait ();	946	poll_wait ();
1180	poll_cb ();	947	poll_cb ();
1181	}	948	}
1182		949
1183	void	950	int
1184	poll()	951	poll()
1185	PROTOTYPE:	952	PROTOTYPE:
1186	CODE:	953	CODE:
1187	if (nreqs)
1188	{
1189	poll_wait ();	954	poll_wait ();
1190	poll_cb ();	955	RETVAL = poll_cb ();
1191	}	956	OUTPUT:
		957	RETVAL
1192		958
1193	int	959	int
1194	poll_fileno()	960	poll_fileno()
1195	PROTOTYPE:	961	PROTOTYPE:
1196	CODE:	962	CODE:
…		…
1208		974
1209	void	975	void
1210	poll_wait()	976	poll_wait()
1211	PROTOTYPE:	977	PROTOTYPE:
1212	CODE:	978	CODE:
1213	if (nreqs)
1214	poll_wait ();	979	poll_wait ();
1215		980
1216	int	981	int
1217	nreqs()	982	nreqs()
1218	PROTOTYPE:	983	PROTOTYPE:
1219	CODE:	984	CODE:
1220	RETVAL = nreqs;	985	RETVAL = eio_nreqs ();
1221	OUTPUT:	986	OUTPUT:
1222	RETVAL	987	RETVAL
1223		988
		989	int
		990	nready()
		991	PROTOTYPE:
		992	CODE:
		993	RETVAL = eio_nready ();
		994	OUTPUT:
		995	RETVAL
		996
		997	int
		998	npending()
		999	PROTOTYPE:
		1000	CODE:
		1001	RETVAL = eio_npending ();
		1002	OUTPUT:
		1003	RETVAL
		1004
		1005	int
		1006	nthreads()
		1007	PROTOTYPE:
		1008	CODE:
		1009	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1010	RETVAL = started;
		1011	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	void _on_next_submit (SV *cb)
		1016	CODE:
		1017	SvREFCNT_dec (on_next_submit);
		1018	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1019
1224	PROTOTYPES: DISABLE	1020	PROTOTYPES: DISABLE
1225		1021
1226	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1022	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227		1023
1228	void	1024	void
1229	cancel (aio_req_ornot req)	1025	cancel (aio_req_ornot req)
1230	PROTOTYPE:
1231	CODE:	1026	CODE:
1232	req_cancel (req);	1027	eio_cancel (req);
		1028
		1029	void
		1030	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1031	CODE:
		1032	SvREFCNT_dec (req->callback);
		1033	req->callback = newSVsv (callback);
1233		1034
1234	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1035	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235		1036
1236	void	1037	void
1237	add (aio_req grp, ...)	1038	add (aio_req grp, ...)
1238	PPCODE:	1039	PPCODE:
1239	{	1040	{
1240	int i;	1041	int i;
1241		1042
		1043	if (grp->int1 == 2)
		1044	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1045
1242	for (i = 1; i < items; ++i )	1046	for (i = 1; i < items; ++i )
1243	{	1047	{
		1048	aio_req req;
		1049
1244	if (GIMME_V != G_VOID)	1050	if (GIMME_V != G_VOID)
1245	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1051	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246		1052
1247	aio_req req = SvAIO_REQ (ST (i));	1053	req = SvAIO_REQ (ST (i));
1248		1054
1249	if (req)	1055	if (req)
1250	{	1056	eio_grp_add (grp, req);
1251	req->grp_prev = grp;
1252	req->grp_next = grp->grp_next;
1253	grp->grp_next->grp_prev = req;
1254	grp->grp_next = req;
1255
1256	req->grp = grp;
1257	}	1057	}
1258	}
1259	}	1058	}
		1059
		1060	void
		1061	cancel_subs (aio_req_ornot req)
		1062	CODE:
		1063	req_cancel_subs (req);
1260		1064
1261	void	1065	void
1262	result (aio_req grp, ...)	1066	result (aio_req grp, ...)
1263	CODE:	1067	CODE:
1264	{	1068	{
1265	int i;	1069	int i;
1266	AV *av = newAV ();	1070	AV *av;
1267		1071
1268	if (grp->data)	1072	grp->errorno = errno;
1269	SvREFCNT_dec (grp->data);
1270		1073
		1074	av = newAV ();
		1075
1271	for (i = 1; i < items; ++i )	1076	for (i = 1; i < items; ++i )
1272	av_push (av, newSVsv (ST (i)));	1077	av_push (av, newSVsv (ST (i)));
1273		1078
		1079	SvREFCNT_dec (grp->sv1);
1274	grp->data = (SV *)av;	1080	grp->sv1 = (SV *)av;
1275	}	1081	}
1276		1082
		1083	void
		1084	errno (aio_req grp, int errorno = errno)
		1085	CODE:
		1086	grp->errorno = errorno;
		1087
		1088	void
		1089	limit (aio_req grp, int limit)
		1090	CODE:
		1091	eio_grp_limit (grp, limit);
		1092
		1093	void
		1094	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1095	CODE:
		1096	{
		1097	SvREFCNT_dec (grp->sv2);
		1098	grp->sv2 = newSVsv (callback);
		1099
		1100	if (grp->int2 <= 0)
		1101	grp->int2 = 2;
		1102
		1103	eio_grp_limit (grp, grp->int2);
		1104	}
		1105

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