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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.117 by root, Sat May 10 20:02:09 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/types.h>	12	#include <sys/types.h>
15	#include <sys/stat.h>	13	#include <sys/stat.h>
16	#include <limits.h>	14	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	15	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	16	#include <sched.h>
21		17
22	#if HAVE_SENDFILE	18	#ifdef _WIN32
23	# if __linux	19
24	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
25	# elif __freebsd	21	# undef malloc
26	# include <sys/socket.h>	22	# undef free
27	# include <sys/uio.h>	23
28	# elif __hpux	24	// perl overrides all those nice win32 functions
29	# include <sys/socket.h>	25	# undef open
30	# elif __solaris /* not yet */	26	# undef read
31	# include <sys/sendfile.h>	27	# undef write
		28	# undef send
		29	# undef recv
		30	# undef stat
		31	# undef fstat
		32	# define lstat stat
		33	# undef truncate
		34	# undef ftruncate
		35	# undef open
		36	# undef close
		37	# undef unlink
		38	# undef rmdir
		39	# undef rename
		40	# undef lseek
		41
		42	# define chown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchmod(a,b) (errno = ENOSYS, -1)
		45	# define symlink(a,b) (errno = ENOSYS, -1)
		46	# define readlink(a,b,c) (errno = ENOSYS, -1)
		47	# define mknod(a,b,c) (errno = ENOSYS, -1)
		48	# define truncate(a,b) (errno = ENOSYS, -1)
		49	# define ftruncate(fd,o) chsize ((fd), (o))
		50	# define fsync(fd) _commit (fd)
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54	# define mkdir(a,b) mkdir (a)
		55
32	# else	56	#else
33	# error sendfile support requested but not available	57
34	# endif	58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	# define EIO_STRUCT_DIRENT struct dirent
		64
35	#endif	65	#endif
36		66
37	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
38	#ifndef NAME_MAX	68
39	# define NAME_MAX 4096	69	/* use NV for 32 bit perls as it allows larger offsets */
		70	#if IVSIZE >= 8
		71	# define SvVAL64 SvIV
		72	#else
		73	# define SvVAL64 SvNV
40	#endif	74	#endif
41		75
42	#if __ia64	76	static HV *stash;
43	# define STACKSIZE 65536	77	typedef SV SV8; /* byte-sv, used for argument-checking */
44	#else	78
45	# define STACKSIZE 8192	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
46	#endif	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
		81
		82	#define EIO_COMMON \
		83	SV *callback; \
		84	SV *sv1, *sv2; \
		85	STRLEN stroffset; \
		86	SV *self
		87
		88	#include "libeio/eio.h"
		89
		90	static int req_invoke (eio_req *req);
		91	#define EIO_FINISH(req) req_invoke (req)
		92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
47		96
48	enum {	97	enum {
49	REQ_QUIT,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};	99	};
59		100
60	#define AIO_CB_KLASS "IO::AIO::CB"	101	#include "libeio/eio.c"
61		102
62	typedef struct aio_cb
63	{
64	struct aio_cb *grp_prev, *grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;
68
69	SV *self; /* the perl counterpart of this request, if any */
70
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	int type;
80	int fd, fd2;
81	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */
84	unsigned char cancelled;
85	} aio_cb;
86
87	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
88	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
89		105
90	static int started, wanted;	106	static SV *on_next_submit;
91	static volatile int nreqs;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
92	static int max_outstanding = 1<<30;	108	static int max_outstanding;
93	static int respipe [2];
94		109
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98		111
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	112	static void req_destroy (aio_req req);
100	static volatile aio_req ress, rese; /* queue start, queue end */	113	static void req_cancel (aio_req req);
101		114
102	typedef struct aio_grp	115	static void want_poll (void)
103	{	116	{
104	struct aio_cb *first, *last;	117	/* write a dummy byte to the pipe so fh becomes ready */
105	SV *callback;	118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
106	int busycount;
107	} aio_grp;
108
109	static void aio_grp_begin (aio_grp *grp)
110	{
111	++grp->busycount;
112	}	119	}
113		120
114	static void aio_grp_end (aio_grp *grp)	121	static void done_poll (void)
115	{	122	{
116	--grp->busycount;	123	/* read any signals sent by the worker threads */
117		124	char buf [4];
118	if (grp->busycount)	125	while (respipe_read (respipe [0], buf, 4) == 4)
119	return;	126	;
120
121	SvREFCNT_dec (grp->callback);
122	grp->callback = 0;
123	}
124
125	static aio_grp *aio_grp_new ()
126	{
127	aio_grp *grp;
128
129	Newz (0, grp, 1, aio_grp);
130	aio_grp_begin (grp);
131
132	return grp;
133	}	127	}
134		128
135	/* must be called at most once */	129	/* must be called at most once */
136	static SV *req_sv (aio_req req)	130	static SV *req_sv (aio_req req, const char *klass)
137	{	131	{
		132	if (!req->self)
		133	{
138	req->self = (SV *)newHV ();	134	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		136	}
140		137
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142	}	139	}
143		140
144	static aio_req SvAIO_REQ (SV *sv)	141	static aio_req SvAIO_REQ (SV *sv)
145	{	142	{
		143	MAGIC *mg;
		144
146	if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))	145	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
147	croak ("object of class " AIO_CB_KLASS " expected");	146	croak ("object of class " AIO_REQ_KLASS " expected");
148		147
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	148	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		149
151	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
152	}	151	}
153		152
		153	static void aio_grp_feed (aio_req grp)
		154	{
		155	if (grp->sv2 && SvOK (grp->sv2))
		156	{
		157	dSP;
		158
		159	ENTER;
		160	SAVETMPS;
		161	PUSHMARK (SP);
		162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		163	PUTBACK;
		164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		165	SPAGAIN;
		166	FREETMPS;
		167	LEAVE;
		168	}
		169	}
		170
		171	static void req_submit (eio_req *req)
		172	{
		173	eio_submit (req);
		174
		175	if (on_next_submit)
		176	{
		177	dSP;
		178	SV *cb = sv_2mortal (on_next_submit);
		179
		180	on_next_submit = 0;
		181
		182	PUSHMARK (SP);
		183	PUTBACK;
		184	call_sv (cb, G_DISCARD | G_EVAL);
		185	}
		186	}
		187
		188	static int req_invoke (eio_req *req)
		189	{
		190	dSP;
		191
		192	if (req->flags & FLAG_SV2_RO_OFF)
		193	SvREADONLY_off (req->sv2);
		194
		195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		196	{
		197	ENTER;
		198	SAVETMPS;
		199	PUSHMARK (SP);
		200	EXTEND (SP, 1);
		201
		202	switch (req->type)
		203	{
		204	case EIO_READDIR:
		205	{
		206	SV *rv = &PL_sv_undef;
		207
		208	if (req->result >= 0)
		209	{
		210	int i;
		211	char *buf = req->ptr2;
		212	AV *av = newAV ();
		213
		214	av_extend (av, req->result - 1);
		215
		216	for (i = 0; i < req->result; ++i)
		217	{
		218	SV *sv = newSVpv (buf, 0);
		219
		220	av_store (av, i, sv);
		221	buf += SvCUR (sv) + 1;
		222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
		225	}
		226
		227	PUSHs (rv);
		228	}
		229	break;
		230
		231	case EIO_OPEN:
		232	{
		233	/* convert fd to fh */
		234	SV *fh = &PL_sv_undef;
		235
		236	if (req->result >= 0)
		237	{
		238	GV *gv = (GV *)sv_newmortal ();
		239	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		240	char sym [64];
		241	int symlen;
		242
		243	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		244	gv_init (gv, stash, sym, symlen, 0);
		245
		246	symlen = snprintf (
		247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
		252	);
		253
		254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
		258	PUSHs (fh);
		259	}
		260	break;
		261
		262	case EIO_GROUP:
		263	req->int1 = 2; /* mark group as finished */
		264
		265	if (req->sv1)
		266	{
		267	int i;
		268	AV *av = (AV *)req->sv1;
		269
		270	EXTEND (SP, AvFILL (av) + 1);
		271	for (i = 0; i <= AvFILL (av); ++i)
		272	PUSHs (*av_fetch (av, i, 0));
		273	}
		274	break;
		275
		276	case EIO_NOP:
		277	case EIO_BUSY:
		278	break;
		279
		280	case EIO_READLINK:
		281	if (req->result > 0)
		282	{
		283	SvCUR_set (req->sv2, req->result);
		284	*SvEND (req->sv2) = 0;
		285	PUSHs (req->sv2);
		286	}
		287	break;
		288
		289	case EIO_STAT:
		290	case EIO_LSTAT:
		291	case EIO_FSTAT:
		292	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		293	PL_laststatval = req->result;
		294	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		295	PUSHs (sv_2mortal (newSViv (req->result)));
		296	break;
		297
		298	case EIO_READ:
		299	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		300	*SvEND (req->sv2) = 0;
		301	PUSHs (sv_2mortal (newSViv (req->result)));
		302	break;
		303
		304	case EIO_DUP2:
		305	if (req->result > 0)
		306	req->result = 0;
		307	/* FALLTHROUGH */
		308
		309	default:
		310	PUSHs (sv_2mortal (newSViv (req->result)));
		311	break;
		312	}
		313
		314	errno = req->errorno;
		315
		316	PUTBACK;
		317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		318	SPAGAIN;
		319
		320	FREETMPS;
		321	LEAVE;
		322
		323	PUTBACK;
		324	}
		325
		326	return !!SvTRUE (ERRSV);
		327	}
		328
154	static void req_free (aio_req req)	329	static void req_destroy (aio_req req)
155	{	330	{
156	if (req->self)	331	if (req->self)
157	{	332	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	333	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	334	SvREFCNT_dec (req->self);
160	}	335	}
161		336
162	if (req->data)
163	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	337	SvREFCNT_dec (req->sv1);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	338	SvREFCNT_dec (req->sv2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	339	SvREFCNT_dec (req->callback);
176
177	if (req->type == REQ_READDIR && req->result >= 0)
178	free (req->data2ptr);
179		340
180	Safefree (req);	341	Safefree (req);
181	}	342	}
182		343
		344	static void req_cancel_subs (aio_req grp)
		345	{
		346	aio_req sub;
		347
		348	if (grp->type != EIO_GROUP)
		349	return;
		350
		351	SvREFCNT_dec (grp->sv2);
		352	grp->sv2 = 0;
		353
		354	eio_grp_cancel (grp);
		355	}
		356
		357	#ifdef USE_SOCKETS_AS_HANDLES
		358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
		362
183	static void	363	static void
184	poll_wait ()	364	create_respipe (void)
185	{	365	{
186	if (nreqs && !ress)	366	int old_readfd = respipe [0];
		367
		368	if (respipe [1] >= 0)
		369	respipe_close (TO_SOCKET (respipe [1]));
		370
		371	#ifdef _WIN32
		372	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		373	#else
		374	if (pipe (respipe))
		375	#endif
		376	croak ("unable to initialize result pipe");
		377
		378	if (old_readfd >= 0)
187	{	379	{
188	fd_set rfd;	380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
189	FD_ZERO(&rfd);	381	croak ("unable to initialize result pipe(2)");
190	FD_SET(respipe [0], &rfd);
191		382
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	383	respipe_close (respipe [0]);
		384	respipe [0] = old_readfd;
193	}	385	}
194	}
195		386
196	static int	387	#ifdef _WIN32
197	poll_cb ()	388	int arg = 1;
198	{	389	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
199	dSP;	390	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
200	int count = 0;	391	#else
201	int do_croak = 0;	392	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
202	aio_req req;	393	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		394	#endif
		395	croak ("unable to initialize result pipe(3)");
203		396
204	for (;;)	397	respipe_osf [0] = TO_SOCKET (respipe [0]);
		398	respipe_osf [1] = TO_SOCKET (respipe [1]);
		399	}
		400
		401	static void poll_wait (void)
		402	{
		403	fd_set rfd;
		404
		405	while (eio_nreqs ())
205	{	406	{
206	pthread_mutex_lock (&reslock);	407	int size;
207	req = ress;
208		408
		409	X_LOCK (reslock);
		410	size = res_queue.size;
		411	X_UNLOCK (reslock);
		412
209	if (req)	413	if (size)
210	{
211	ress = req->next;
212
213	if (!ress)
214	{
215	/* read any signals sent by the worker threads */
216	char buf [32];
217	while (read (respipe [0], buf, 32) == 32)
218	;
219
220	rese = 0;
221	}
222	}
223
224	pthread_mutex_unlock (&reslock);
225
226	if (!req)
227	break;	414	return;
228		415
229	nreqs--;	416	maybe_start_thread ();
230		417
231	if (req->type == REQ_QUIT)	418	FD_ZERO (&rfd);
232	started--;	419	FD_SET (respipe [0], &rfd);
233	else
234	{
235	int errorno = errno;
236	errno = req->errorno;
237		420
238	if (req->type == REQ_READ)	421	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240
241	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);
243
244	if (req->statdata)
245	{
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
247	PL_laststatval = req->result;
248	PL_statcache = *(req->statdata);
249	}
250
251	ENTER;
252	PUSHMARK (SP);
253
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}
277	else
278	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));
280
281	if (req->type == REQ_OPEN)
282	{
283	/* convert fd to fh */
284	SV *fh;
285
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}
295	}
296
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID | G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);
306	croak (0);
307	}
308	}
309
310	LEAVE;
311
312	errno = errorno;
313	count++;
314	}
315
316	req_free (req);
317	}	422	}
318
319	return count;
320	}	423	}
321		424
322	static void *aio_proc(void *arg);	425	static int poll_cb (void)
323
324	static void
325	start_thread (void)
326	{	426	{
327	sigset_t fullsigset, oldsigset;	427	int res;
328	pthread_t tid;
329	pthread_attr_t attr;
330		428
331	pthread_attr_init (&attr);	429	do
332	pthread_attr_setstacksize (&attr, STACKSIZE);
333	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334
335	sigfillset (&fullsigset);
336	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337
338	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
339	started++;
340
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);
342	}
343
344	static void
345	req_send (aio_req req)
346	{
347	while (started < wanted && nreqs >= started)
348	start_thread ();
349
350	nreqs++;
351
352	pthread_mutex_lock (&reqlock);
353
354	req->next = 0;
355
356	if (reqe)
357	{	430	{
358	reqe->next = req;	431	res = eio_poll ();
359	reqe = req;	432
		433	if (res > 0)
		434	croak (0);
360	}	435	}
361	else	436	while (max_outstanding && max_outstanding <= eio_nreqs ());
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);
366
367	if (nreqs > max_outstanding)
368	for (;;)
369	{
370	poll_cb ();
371
372	if (nreqs <= max_outstanding)
373	break;
374
375	poll_wait ();
376	}
377	}
378
379	static void
380	end_thread (void)
381	{
382	aio_req req;
383	Newz (0, req, 1, aio_cb);
384	req->type = REQ_QUIT;
385
386	req_send (req);
387	}
388
389	static void min_parallel (int nthreads)
390	{
391	if (wanted < nthreads)
392	wanted = nthreads;
393	}
394
395	static void max_parallel (int nthreads)
396	{
397	int cur = started;
398
399	if (wanted > nthreads)
400	wanted = nthreads;
401
402	while (cur > wanted)
403	{
404	end_thread ();
405	cur--;
406	}
407
408	while (started > wanted)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}
414
415	static void create_pipe ()
416	{
417	if (pipe (respipe))
418	croak ("unable to initialize result pipe");
419
420	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
421	croak ("cannot set result pipe to nonblocking mode");
422
423	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
424	croak ("cannot set result pipe to nonblocking mode");
425	}
426
427	/*****************************************************************************/
428	/* work around various missing functions */
429
430	#if !HAVE_PREADWRITE
431	# define pread aio_pread
432	# define pwrite aio_pwrite
433
434	/*
435	* make our pread/pwrite safe against themselves, but not against
436	* normal read/write by using a mutex. slows down execution a lot,
437	* but that's your problem, not mine.
438	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440
441	static ssize_t
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{
444	ssize_t res;
445	off_t ooffset;
446
447	pthread_mutex_lock (&preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);
453		437
454	return res;	438	return res;
455	}	439	}
456		440
457	static ssize_t
458	pwrite (int fd, void *buf, size_t count, off_t offset)
459	{
460	ssize_t res;
461	off_t ooffset;
462
463	pthread_mutex_lock (&preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);
469
470	return res;
471	}
472	#endif
473
474	#if !HAVE_FDATASYNC
475	# define fdatasync fsync
476	#endif
477
478	#if !HAVE_READAHEAD
479	# define readahead aio_readahead
480
481	static ssize_t
482	readahead (int fd, off_t offset, size_t count)
483	{
484	char readahead_buf[4096];
485
486	while (count > 0)
487	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
489
490	pread (fd, readahead_buf, len, offset);
491	offset += len;
492	count -= len;
493	}
494
495	errno = 0;
496	}
497	#endif
498
499	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r
501
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503
504	static int
505	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506	{
507	struct dirent *e;
508	int errorno;
509
510	pthread_mutex_lock (&readdirlock);
511
512	e = readdir (dirp);
513	errorno = errno;
514
515	if (e)
516	{
517	*res = ent;
518	strcpy (ent->d_name, e->d_name);
519	}
520	else
521	*res = 0;
522
523	pthread_mutex_unlock (&readdirlock);
524
525	errno = errorno;
526	return e ? 0 : -1;
527	}
528	#endif
529
530	/* sendfile always needs emulation */
531	static ssize_t
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
533	{
534	ssize_t res;
535
536	if (!count)
537	return 0;
538
539	#if HAVE_SENDFILE
540	# if __linux
541	res = sendfile (ofd, ifd, &offset, count);
542
543	# elif __freebsd
544	/*
545	* Of course, the freebsd sendfile is a dire hack with no thoughts
546	* wasted on making it similar to other I/O functions.
547	*/
548	{
549	off_t sbytes;
550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551
552	if (res < 0 && sbytes)
553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
554	res = sbytes;
555	}
556
557	# elif __hpux
558	res = sendfile (ofd, ifd, offset, count, 0, 0);
559
560	# elif __solaris
561	{
562	struct sendfilevec vec;
563	size_t sbytes;
564
565	vec.sfv_fd = ifd;
566	vec.sfv_flag = 0;
567	vec.sfv_off = offset;
568	vec.sfv_len = count;
569
570	res = sendfilev (ofd, &vec, 1, &sbytes);
571
572	if (res < 0 && sbytes)
573	res = sbytes;
574	}
575
576	# endif
577	#else
578	res = -1;
579	errno = ENOSYS;
580	#endif
581
582	if (res < 0
583	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
584	#if __solaris
585	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
586	#endif
587	)
588	)
589	{
590	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];
592	res = 0;
593
594	while (count)
595	{
596	ssize_t cnt;
597
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
599
600	if (cnt <= 0)
601	{
602	if (cnt && !res) res = -1;
603	break;
604	}
605
606	cnt = write (ofd, buf, cnt);
607
608	if (cnt <= 0)
609	{
610	if (cnt && !res) res = -1;
611	break;
612	}
613
614	offset += cnt;
615	res += cnt;
616	count -= cnt;
617	}
618	}
619
620	return res;
621	}
622
623	/* read a full directory */
624	static int
625	scandir_ (const char *path, void **namesp)
626	{
627	DIR *dirp = opendir (path);
628	union
629	{
630	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;
633	struct dirent *entp;
634	char *name, *names;
635	int memlen = 4096;
636	int memofs = 0;
637	int res = 0;
638	int errorno;
639
640	if (!dirp)
641	return -1;
642
643	names = malloc (memlen);
644
645	for (;;)
646	{
647	errno = 0, readdir_r (dirp, &u.d, &entp);
648
649	if (!entp)
650	break;
651
652	name = entp->d_name;
653
654	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655	{
656	int len = strlen (name) + 1;
657
658	res++;
659
660	while (memofs + len > memlen)
661	{
662	memlen *= 2;
663	names = realloc (names, memlen);
664	if (!names)
665	break;
666	}
667
668	memcpy (names + memofs, name, len);
669	memofs += len;
670	}
671	}
672
673	errorno = errno;
674	closedir (dirp);
675
676	if (errorno)
677	{
678	free (names);
679	errno = errorno;
680	res = -1;
681	}
682
683	*namesp = (void *)names;
684	return res;
685	}
686
687	/*****************************************************************************/
688
689	static void *
690	aio_proc (void *thr_arg)
691	{
692	aio_req req;
693	int type;
694
695	do
696	{
697	pthread_mutex_lock (&reqlock);
698
699	for (;;)
700	{
701	req = reqs;
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708
709	if (req)
710	break;
711
712	pthread_cond_wait (&reqwait, &reqlock);
713	}
714
715	pthread_mutex_unlock (&reqlock);
716
717	errno = 0; /* strictly unnecessary */
718
719	if (!req->cancelled)
720	switch (req->type)
721	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
724
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
727
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
731
732	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
733	case REQ_CLOSE: req->result = close (req->fd); break;
734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
739
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
743
744	case REQ_QUIT:
745	break;
746
747	default:
748	req->result = ENOSYS;
749	break;
750	}
751
752	req->errorno = errno;
753
754	pthread_mutex_lock (&reslock);
755
756	req->next = 0;
757
758	if (rese)
759	{
760	rese->next = req;
761	rese = req;
762	}
763	else
764	{
765	rese = ress = req;
766
767	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);
769	}
770
771	pthread_mutex_unlock (&reslock);
772	}
773	while (type != REQ_QUIT);
774
775	return 0;
776	}
777
778	/*****************************************************************************/
779
780	static void atfork_prepare (void)
781	{
782	pthread_mutex_lock (&reqlock);
783	pthread_mutex_lock (&reslock);
784	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);
786	#endif
787	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);
789	#endif
790	}
791
792	static void atfork_parent (void)
793	{
794	#if !HAVE_READDIR_R
795	pthread_mutex_unlock (&readdirlock);
796	#endif
797	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);
799	#endif
800	pthread_mutex_unlock (&reslock);
801	pthread_mutex_unlock (&reqlock);
802	}
803
804	static void atfork_child (void)	441	static void atfork_child (void)
805	{	442	{
806	aio_req prv;
807
808	started = 0;
809
810	while (reqs)
811	{
812	prv = reqs;
813	reqs = prv->next;
814	req_free (prv);
815	}
816
817	reqs = reqe = 0;
818
819	while (ress)
820	{
821	prv = ress;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827
828	close (respipe [0]);
829	close (respipe [1]);
830	create_pipe ();	443	create_respipe ();
831
832	atfork_parent ();
833	}	444	}
834		445
835	#define dREQ \	446	#define dREQ \
836	aio_req req; \	447	aio_req req; \
		448	int req_pri = next_pri; \
		449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
837	\	450	\
838	if (SvOK (callback) && !SvROK (callback)) \	451	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \	452	croak ("callback must be undef or of reference type"); \
840	\	453	\
841	Newz (0, req, 1, aio_cb); \	454	Newz (0, req, 1, eio_req); \
842	if (!req) \	455	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	456	croak ("out of memory during eio_req allocation"); \
844	\	457	\
845	req->callback = newSVsv (callback)	458	req->callback = newSVsv (callback); \
		459	req->pri = req_pri
846		460
847	#define REQ_SEND \	461	#define REQ_SEND \
848	req_send (req); \	462	req_submit (req); \
849	\	463	\
850	if (GIMME_V != G_VOID) \	464	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
852		466
853	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
854		468
855	PROTOTYPES: ENABLE	469	PROTOTYPES: ENABLE
856		470
857	BOOT:	471	BOOT:
858	{	472	{
859	HV *stash = gv_stashpv ("IO::AIO", 1);	473	stash = gv_stashpv ("IO::AIO", 1);
		474
860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	477	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		478	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		479	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		480	#ifdef _WIN32
		481	X_MUTEX_CHECK (wrklock);
		482	X_MUTEX_CHECK (reslock);
		483	X_MUTEX_CHECK (reqlock);
		484	X_MUTEX_CHECK (reqwait);
		485	X_MUTEX_CHECK (preadwritelock);
		486	X_MUTEX_CHECK (readdirlock);
863		487
864	create_pipe ();	488	X_COND_CHECK (reqwait);
865	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	489	#else
866	}	490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
867		492
		493	create_respipe ();
		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
868	void	502	void
869	min_parallel (nthreads)	503	max_poll_reqs (int nreqs)
870	int nthreads
871	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
872		507
873	void	508	void
874	max_parallel (nthreads)	509	max_poll_time (double nseconds)
875	int nthreads
876	PROTOTYPE: $	510	PROTOTYPE: $
877
878	int
879	max_outstanding (nreqs)
880	int nreqs
881	PROTOTYPE: $
882	CODE:	511	CODE:
883	RETVAL = max_outstanding;	512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
884	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
885		537
886	void	538	void
887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
888	SV * pathname
889	int flags
890	int mode
891	SV * callback
892	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
893	PPCODE:	541	PPCODE:
894	{	542	{
895	dREQ;	543	dREQ;
896		544
897	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
898	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
899	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
900	req->fd = flags;	548	req->int1 = flags;
901	req->mode = mode;	549	req->int2 = mode;
902		550
903	REQ_SEND;	551	REQ_SEND;
904	}	552	}
905		553
906	void	554	void
907	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
908	SV * fh
909	SV * callback
910	PROTOTYPE: $;$	556	PROTOTYPE: $;$
911	ALIAS:	557	ALIAS:
912	aio_close = REQ_CLOSE
913	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
914	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
915	PPCODE:	560	PPCODE:
916	{	561	{
917	dREQ;	562	dREQ;
918		563
919	req->type = ix;	564	req->type = ix;
920	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
921	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
922		567
923	REQ_SEND (req);	568	REQ_SEND (req);
924	}	569	}
925		570
926	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
927	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
928	SV * fh
929	UV offset
930	UV length
931	SV * data
932	UV dataoffset
933	SV * callback
934	ALIAS:	601	ALIAS:
935	aio_read = REQ_READ	602	aio_read = EIO_READ
936	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
937	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
938	PPCODE:	605	PPCODE:
939	{	606	{
940	aio_req req;
941	STRLEN svlen;	607	STRLEN svlen;
942	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
943		610
944	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
945	SvPOK_on (data);	612	SvPOK_on (data);
946		613
947	if (dataoffset < 0)	614	if (dataoffset < 0)
948	dataoffset += svlen;	615	dataoffset += svlen;
949		616
950	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
951	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
952		619
953	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
954	{	621	{
955	/* write: check length and adjust. */	622	/* write: check length and adjust. */
956	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
957	length = svlen - dataoffset;	624	len = svlen - dataoffset;
958	}	625	}
959	else	626	else
960	{	627	{
961	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
962	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
963	}	630	}
964		631
965	if (length < 0)	632	if (len < 0)
966	croak ("length must not be negative");	633	croak ("length must not be negative");
967		634
968	{	635	{
969	dREQ;	636	dREQ;
970		637
971	req->type = ix;	638	req->type = ix;
972	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
973	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
974	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
975	req->offset = offset;	643	req->size = len;
976	req->length = length;
977	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
978	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
979		647
980	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
981	{	649	{
982	SvREADONLY_on (data);	650	SvREADONLY_on (data);
983	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
984	}	652	}
985		653
986	REQ_SEND;	654	REQ_SEND;
987	}	655	}
988	}	656	}
989		657
990	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	data = newSV (NAME_MAX);
		667	SvPOK_on (data);
		668
		669	req->type = EIO_READLINK;
		670	req->sv1 = newSVsv (path);
		671	req->ptr1 = SvPVbyte_nolen (req->sv1);
		672	req->sv2 = data;
		673	req->ptr2 = SvPVbyte_nolen (data);
		674
		675	REQ_SEND;
		676	}
		677
		678	void
991	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	679	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
992	SV * out_fh
993	SV * in_fh
994	UV in_offset
995	UV length
996	SV * callback
997	PROTOTYPE: $$$$;$	680	PROTOTYPE: $$$$;$
998	PPCODE:	681	PPCODE:
999	{	682	{
1000	dREQ;	683	dREQ;
1001		684
1002	req->type = REQ_SENDFILE;	685	req->type = EIO_SENDFILE;
1003	req->fh = newSVsv (out_fh);	686	req->sv1 = newSVsv (out_fh);
1004	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1005	req->fh2 = newSVsv (in_fh);	688	req->sv2 = newSVsv (in_fh);
1006	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1007	req->offset = in_offset;	690	req->offs = SvVAL64 (in_offset);
1008	req->length = length;	691	req->size = length;
1009		692
1010	REQ_SEND;	693	REQ_SEND;
1011	}	694	}
1012		695
1013	void	696	void
1014	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1015	SV * fh
1016	UV offset
1017	IV length
1018	SV * callback
1019	PROTOTYPE: $$$;$	698	PROTOTYPE: $$$;$
1020	PPCODE:	699	PPCODE:
1021	{	700	{
1022	dREQ;	701	dREQ;
1023		702
1024	req->type = REQ_READAHEAD;	703	req->type = EIO_READAHEAD;
1025	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1026	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1027	req->offset = offset;	706	req->offs = SvVAL64 (offset);
1028	req->length = length;	707	req->size = length;
1029		708
1030	REQ_SEND;	709	REQ_SEND;
1031	}	710	}
1032		711
1033	void	712	void
1034	aio_stat (fh_or_path,callback=&PL_sv_undef)	713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1035	SV * fh_or_path
1036	SV * callback
1037	ALIAS:	714	ALIAS:
1038	aio_stat = REQ_STAT	715	aio_stat = EIO_STAT
1039	aio_lstat = REQ_LSTAT	716	aio_lstat = EIO_LSTAT
1040	PPCODE:	717	PPCODE:
1041	{	718	{
1042	dREQ;	719	dREQ;
1043		720
1044	New (0, req->statdata, 1, Stat_t);	721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1045	if (!req->statdata)	722	if (!req->ptr2)
1046	{	723	{
1047	req_free (req);	724	req_destroy (req);
1048	croak ("out of memory during aio_req->statdata allocation");	725	croak ("out of memory during aio_stat statdata allocation");
1049	}	726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
1050		730
1051	if (SvPOK (fh_or_path))	731	if (SvPOK (fh_or_path))
1052	{	732	{
1053	req->type = ix;	733	req->type = ix;
1054	req->data = newSVsv (fh_or_path);
1055	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	}	735	}
1057	else	736	else
1058	{	737	{
1059	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
1060	req->fh = newSVsv (fh_or_path);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1062	}	740	}
1063		741
1064	REQ_SEND;	742	REQ_SEND;
1065	}	743	}
1066		744
1067	void	745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (fh_or_path))
		756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
		765
		766	REQ_SEND;
		767	}
		768
		769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (fh_or_path))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_fchmod = EIO_FCHMOD
		797	aio_mkdir = EIO_MKDIR
		798	PPCODE:
		799	{
		800	dREQ;
		801
		802	req->type = ix;
		803	req->int2 = mode;
		804	req->sv1 = newSVsv (fh_or_path);
		805
		806	if (ix == EIO_FCHMOD)
		807	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		808	else
		809	req->ptr1 = SvPVbyte_nolen (req->sv1);
		810
		811	REQ_SEND;
		812	}
		813
		814	void
		815	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		816	PPCODE:
		817	{
		818	dREQ;
		819
		820	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		821	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		822	req->sv1 = newSVsv (fh_or_path);
		823
		824	if (SvPOK (fh_or_path))
		825	{
		826	req->type = EIO_CHOWN;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FCHOWN;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
1068	aio_unlink (pathname,callback=&PL_sv_undef)	839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1069	SV * pathname
1070	SV * callback
1071	ALIAS:	840	ALIAS:
1072	aio_unlink = REQ_UNLINK	841	aio_unlink = EIO_UNLINK
1073	aio_rmdir = REQ_RMDIR	842	aio_rmdir = EIO_RMDIR
1074	aio_readdir = REQ_READDIR	843	aio_readdir = EIO_READDIR
1075	PPCODE:	844	PPCODE:
1076	{	845	{
1077	dREQ;	846	dREQ;
1078		847
1079	req->type = ix;	848	req->type = ix;
1080	req->data = newSVsv (pathname);	849	req->sv1 = newSVsv (pathname);
1081	req->dataptr = SvPVbyte_nolen (req->data);	850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		857	ALIAS:
		858	aio_link = EIO_LINK
		859	aio_symlink = EIO_SYMLINK
		860	aio_rename = EIO_RENAME
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->type = ix;
		866	req->sv1 = newSVsv (oldpath);
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	req->sv2 = newSVsv (newpath);
		869	req->ptr2 = SvPVbyte_nolen (req->sv2);
1082		870
1083	REQ_SEND;	871	REQ_SEND;
1084	}	872	}
1085		873
1086	void	874	void
1087	aio_link (oldpath,newpath,callback=&PL_sv_undef)	875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1088	SV * oldpath
1089	SV * newpath
1090	SV * callback
1091	ALIAS:
1092	aio_link = REQ_LINK
1093	aio_symlink = REQ_SYMLINK
1094	aio_rename = REQ_RENAME
1095	PPCODE:	876	PPCODE:
1096	{	877	{
1097	dREQ;	878	dREQ;
1098		879
1099	req->type = ix;	880	req->type = EIO_MKNOD;
1100	req->fh = newSVsv (oldpath);	881	req->sv1 = newSVsv (pathname);
1101	req->data2ptr = SvPVbyte_nolen (req->fh);	882	req->ptr1 = SvPVbyte_nolen (req->sv1);
1102	req->data = newSVsv (newpath);	883	req->int2 = (mode_t)mode;
1103	req->dataptr = SvPVbyte_nolen (req->data);	884	req->offs = dev;
1104		885
1105	REQ_SEND;	886	REQ_SEND;
1106	}	887	}
1107		888
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	889	void
1112	cancel_most_requests ()	890	aio_busy (double delay, SV *callback=&PL_sv_undef)
		891	PPCODE:
		892	{
		893	dREQ;
		894
		895	req->type = EIO_BUSY;
		896	req->nv1 = delay < 0. ? 0. : delay;
		897
		898	REQ_SEND;
		899	}
		900
		901	void
		902	aio_group (SV *callback=&PL_sv_undef)
1113	PROTOTYPE:	903	PROTOTYPE: ;$
1114	CODE:	904	PPCODE:
1115	{	905	{
1116	aio_req *req;	906	dREQ;
1117		907
1118	pthread_mutex_lock (&reqlock);	908	req->type = EIO_GROUP;
1119	for (req = reqs; req; req = req->next)
1120	req->flags |= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		909
1123	pthread_mutex_lock (&reslock);	910	eio_submit (req);
1124	for (req = ress; req; req = req->next)	911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1125	req->flags |= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}	912	}
1128		913
1129	#endif	914	void
		915	aio_nop (SV *callback=&PL_sv_undef)
		916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924
		925	REQ_SEND;
		926	}
		927
		928	int
		929	aioreq_pri (int pri = 0)
		930	PROTOTYPE: ;$
		931	CODE:
		932	RETVAL = next_pri - EIO_PRI_BIAS;
		933	if (items > 0)
		934	{
		935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		937	next_pri = pri + EIO_PRI_BIAS;
		938	}
		939	OUTPUT:
		940	RETVAL
		941
		942	void
		943	aioreq_nice (int nice = 0)
		944	CODE:
		945	nice = next_pri - nice;
		946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		948	next_pri = nice + EIO_PRI_BIAS;
1130		949
1131	void	950	void
1132	flush ()	951	flush ()
1133	PROTOTYPE:	952	PROTOTYPE:
1134	CODE:	953	CODE:
1135	while (nreqs)	954	while (eio_nreqs ())
1136	{	955	{
1137	poll_wait ();	956	poll_wait ();
1138	poll_cb ();	957	poll_cb ();
1139	}	958	}
1140		959
1141	void	960	int
1142	poll()	961	poll()
1143	PROTOTYPE:	962	PROTOTYPE:
1144	CODE:	963	CODE:
1145	if (nreqs)
1146	{
1147	poll_wait ();	964	poll_wait ();
1148	poll_cb ();	965	RETVAL = poll_cb ();
1149	}	966	OUTPUT:
		967	RETVAL
1150		968
1151	int	969	int
1152	poll_fileno()	970	poll_fileno()
1153	PROTOTYPE:	971	PROTOTYPE:
1154	CODE:	972	CODE:
…		…
1166		984
1167	void	985	void
1168	poll_wait()	986	poll_wait()
1169	PROTOTYPE:	987	PROTOTYPE:
1170	CODE:	988	CODE:
1171	if (nreqs)
1172	poll_wait ();	989	poll_wait ();
1173		990
1174	int	991	int
1175	nreqs()	992	nreqs()
1176	PROTOTYPE:	993	PROTOTYPE:
1177	CODE:	994	CODE:
1178	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
1179	OUTPUT:	996	OUTPUT:
1180	RETVAL	997	RETVAL
1181		998
		999	int
		1000	nready()
		1001	PROTOTYPE:
		1002	CODE:
		1003	RETVAL = eio_nready ();
		1004	OUTPUT:
		1005	RETVAL
		1006
		1007	int
		1008	npending()
		1009	PROTOTYPE:
		1010	CODE:
		1011	RETVAL = eio_npending ();
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	int
		1016	nthreads()
		1017	PROTOTYPE:
		1018	CODE:
		1019	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1020	RETVAL = started;
		1021	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1022	OUTPUT:
		1023	RETVAL
		1024
		1025	void _on_next_submit (SV *cb)
		1026	CODE:
		1027	SvREFCNT_dec (on_next_submit);
		1028	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1029
		1030	PROTOTYPES: DISABLE
		1031
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1183		1033
1184	void	1034	void
1185	cancel (aio_req_ornot req)	1035	cancel (aio_req_ornot req)
1186	PROTOTYPE:
1187	CODE:	1036	CODE:
1188	req->cancelled = 1;	1037	eio_cancel (req);
1189		1038
		1039	void
		1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1041	CODE:
		1042	SvREFCNT_dec (req->callback);
		1043	req->callback = newSVsv (callback);
		1044
		1045	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1046
		1047	void
		1048	add (aio_req grp, ...)
		1049	PPCODE:
		1050	{
		1051	int i;
		1052
		1053	if (grp->int1 == 2)
		1054	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1055
		1056	for (i = 1; i < items; ++i )
		1057	{
		1058	aio_req req;
		1059
		1060	if (GIMME_V != G_VOID)
		1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1062
		1063	req = SvAIO_REQ (ST (i));
		1064
		1065	if (req)
		1066	eio_grp_add (grp, req);
		1067	}
		1068	}
		1069
		1070	void
		1071	cancel_subs (aio_req_ornot req)
		1072	CODE:
		1073	req_cancel_subs (req);
		1074
		1075	void
		1076	result (aio_req grp, ...)
		1077	CODE:
		1078	{
		1079	int i;
		1080	AV *av;
		1081
		1082	grp->errorno = errno;
		1083
		1084	av = newAV ();
		1085
		1086	for (i = 1; i < items; ++i )
		1087	av_push (av, newSVsv (ST (i)));
		1088
		1089	SvREFCNT_dec (grp->sv1);
		1090	grp->sv1 = (SV *)av;
		1091	}
		1092
		1093	void
		1094	errno (aio_req grp, int errorno = errno)
		1095	CODE:
		1096	grp->errorno = errorno;
		1097
		1098	void
		1099	limit (aio_req grp, int limit)
		1100	CODE:
		1101	eio_grp_limit (grp, limit);
		1102
		1103	void
		1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1105	CODE:
		1106	{
		1107	SvREFCNT_dec (grp->sv2);
		1108	grp->sv2 = newSVsv (callback);
		1109
		1110	if (grp->int2 <= 0)
		1111	grp->int2 = 2;
		1112
		1113	eio_grp_limit (grp, grp->int2);
		1114	}
		1115

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