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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 UTC vs.
Revision 1.143 by root, Sat Jun 6 19:44:17 2009 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
13	#include <sys/types.h>	12	#include <sys/types.h>
14	#include <sys/stat.h>	13	#include <sys/stat.h>
15	#include <limits.h>	14	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	15	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	16	#include <sched.h>
20		17
21	#if HAVE_SENDFILE	18	/* perl namespace pollution */
22	# if __linux	19	#undef VERSION
23	# include <sys/sendfile.h>	20
24	# elif __freebsd	21	#ifdef _WIN32
25	# include <sys/socket.h>	22
26	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
27	# elif __hpux	24	# undef malloc
28	# include <sys/socket.h>	25	# undef free
29	# elif __solaris /* not yet */	26
30	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
31	# else	59	#else
32	# error sendfile support requested but not available	60
33	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
34	#endif	68	#endif
35		69
36	#if __ia64	70	/* perl stupidly overrides readdir and maybe others */
37	# define STACKSIZE 65536	71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
38	#else	81	#else
39	# define STACKSIZE 8192	82	# define SvVAL64 SvNV
40	#endif	83	#endif
41		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
		118
42	enum {	119	enum {
43	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
44	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,
50	REQ_READDIR,
51	REQ_SYMLINK,
52	};	121	};
53		122
54	typedef struct aio_cb {	123	#include "libeio/eio.c"
55	struct aio_cb *volatile next;
56		124
57	int type;
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
75		127
76	static int started, wanted;	128	static SV *on_next_submit;
77	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
78	static int max_outstanding = 1<<30;	130	static int max_outstanding;
79	static int respipe [2];
80		131
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		133
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92		136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
		155	{
		156	req->self = (SV *)newHV ();
		157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
		159
		160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		174
		175	static void aio_grp_feed (aio_req grp)
		176	{
		177	if (grp->sv2 && SvOK (grp->sv2))
		178	{
		179	dSP;
		180
		181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
		225	{
		226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
		229
		230	if (req->result >= 0)
		231	{
		232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
		235
		236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
		239	{
		240	if (req->int1 & EIO_READDIR_DENTS)
		241	{
		242	eio_dirent *ent = (eio_dirent *)buf;
		243	SV *namesv = newSVpvn (ent->name, ent->namelen);
		244
		245	if (req->int1 & EIO_READDIR_CUSTOM2)
		246	{
		247	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		248	AV *avent = newAV ();
		249
		250	av_extend (avent, 2);
		251
		252	if (!sv_type [ent->type])
		253	{
		254	sv_type [ent->type] = newSViv (ent->type);
		255	SvREADONLY_on (sv_type [ent->type]);
		256	}
		257
		258	av_store (avent, 0, namesv);
		259	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		260	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		261
		262	av_store (av, i, newRV_noinc ((SV *)avent));
		263	}
		264	else
		265	av_store (av, i, namesv);
		266
		267	buf += sizeof (eio_dirent);
		268	}
		269	else
		270	{
		271	SV *name = newSVpv (buf, 0);
		272	av_store (av, i, name);
		273	buf += SvCUR (name) + 1;
		274	}
		275	}
		276
		277	rv = sv_2mortal (newRV_noinc ((SV *)av));
		278	}
		279
		280	PUSHs (rv);
		281
		282	if (req->int1 & EIO_READDIR_CUSTOM1)
		283	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		284	}
		285	break;
		286
		287	case EIO_OPEN:
		288	{
		289	/* convert fd to fh */
		290	SV *fh = &PL_sv_undef;
		291
		292	if (req->result >= 0)
		293	{
		294	GV *gv = (GV *)sv_newmortal ();
		295	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		296	char sym [64];
		297	int symlen;
		298
		299	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		300	gv_init (gv, stash, sym, symlen, 0);
		301
		302	symlen = snprintf (
		303	sym,
		304	sizeof (sym),
		305	"%s&=%d",
		306	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		307	req->result
		308	);
		309
		310	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		311	fh = (SV *)gv;
		312	}
		313
		314	PUSHs (fh);
		315	}
		316	break;
		317
		318	case EIO_GROUP:
		319	req->int1 = 2; /* mark group as finished */
		320
		321	if (req->sv1)
		322	{
		323	int i;
		324	AV *av = (AV *)req->sv1;
		325
		326	EXTEND (SP, AvFILL (av) + 1);
		327	for (i = 0; i <= AvFILL (av); ++i)
		328	PUSHs (*av_fetch (av, i, 0));
		329	}
		330	break;
		331
		332	case EIO_NOP:
		333	case EIO_BUSY:
		334	break;
		335
		336	case EIO_READLINK:
		337	if (req->result > 0)
		338	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		339	break;
		340
		341	case EIO_STAT:
		342	case EIO_LSTAT:
		343	case EIO_FSTAT:
		344	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		345	PL_laststatval = req->result;
		346	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		347	PUSHs (sv_2mortal (newSViv (req->result)));
		348	break;
		349
		350	case EIO_READ:
		351	{
		352	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		353	*SvEND (req->sv2) = 0;
		354	SvPOK_only (req->sv2);
		355	SvSETMAGIC (req->sv2);
		356	PUSHs (sv_2mortal (newSViv (req->result)));
		357	}
		358	break;
		359
		360	case EIO_DUP2:
		361	if (req->result > 0)
		362	req->result = 0;
		363	/* FALLTHROUGH */
		364
		365	default:
		366	PUSHs (sv_2mortal (newSViv (req->result)));
		367	break;
		368	}
		369
		370	errno = req->errorno;
		371
		372	PUTBACK;
		373	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		374	SPAGAIN;
		375
		376	FREETMPS;
		377	LEAVE;
		378
		379	PUTBACK;
		380	}
		381
		382	return !!SvTRUE (ERRSV);
		383	}
		384
		385	static void req_destroy (aio_req req)
		386	{
93	if (req->fh)	387	if (req->self)
		388	{
		389	sv_unmagic (req->self, PERL_MAGIC_ext);
94	SvREFCNT_dec (req->fh);	390	SvREFCNT_dec (req->self);
		391	}
95		392
96	if (req->fh2)	393	SvREFCNT_dec (req->sv1);
97	SvREFCNT_dec (req->fh2);	394	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	395	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107		396
108	Safefree (req);	397	Safefree (req);
109	}	398	}
110		399
		400	static void req_cancel_subs (aio_req grp)
		401	{
		402	aio_req sub;
		403
		404	if (grp->type != EIO_GROUP)
		405	return;
		406
		407	SvREFCNT_dec (grp->sv2);
		408	grp->sv2 = 0;
		409
		410	eio_grp_cancel (grp);
		411	}
		412
		413	#ifdef USE_SOCKETS_AS_HANDLES
		414	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		415	#else
		416	# define TO_SOCKET(x) (x)
		417	#endif
		418
111	static void	419	static void
112	poll_wait ()	420	create_respipe (void)
113	{	421	{
114	if (nreqs && !ress)	422	int old_readfd = respipe [0];
		423
		424	if (respipe [1] >= 0)
		425	respipe_close (TO_SOCKET (respipe [1]));
		426
		427	#ifdef _WIN32
		428	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		429	#else
		430	if (pipe (respipe))
		431	#endif
		432	croak ("unable to initialize result pipe");
		433
		434	if (old_readfd >= 0)
115	{	435	{
116	fd_set rfd;	436	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
117	FD_ZERO(&rfd);	437	croak ("unable to initialize result pipe(2)");
118	FD_SET(respipe [0], &rfd);
119		438
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	439	respipe_close (respipe [0]);
		440	respipe [0] = old_readfd;
121	}	441	}
122	}
123		442
124	static int	443	#ifdef _WIN32
125	poll_cb ()	444	int arg = 1;
126	{	445	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
127	dSP;	446	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
128	int count = 0;	447	#else
129	int do_croak = 0;	448	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
130	aio_req req;	449	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		450	#endif
		451	croak ("unable to initialize result pipe(3)");
131		452
		453	respipe_osf [0] = TO_SOCKET (respipe [0]);
		454	respipe_osf [1] = TO_SOCKET (respipe [1]);
		455	}
		456
		457	static void poll_wait (void)
		458	{
		459	fd_set rfd;
		460
		461	while (eio_nreqs ())
		462	{
		463	int size;
		464
		465	X_LOCK (reslock);
		466	size = res_queue.size;
		467	X_UNLOCK (reslock);
		468
		469	if (size)
		470	return;
		471
		472	etp_maybe_start_thread ();
		473
		474	FD_ZERO (&rfd);
		475	FD_SET (respipe [0], &rfd);
		476
		477	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		478	}
		479	}
		480
		481	static int poll_cb (void)
		482	{
132	for (;;)	483	for (;;)
133	{	484	{
134	pthread_mutex_lock (&reslock);	485	int res = eio_poll ();
135	req = ress;
136		486
137	if (req)	487	if (res > 0)
138	{
139	ress = req->next;
140
141	if (!ress)
142	{
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147
148	rese = 0;
149	}
150	}
151
152	pthread_mutex_unlock (&reslock);
153
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);	488	croak (0);
235	}
236	}
237		489
238	LEAVE;	490	if (!max_outstanding || max_outstanding > eio_nreqs ())
		491	return res;
239		492
240	errno = errorno;	493	poll_wait ();
241	count++;
242	}
243
244	free_req (req);
245	}	494	}
246
247	return count;
248	}	495	}
249		496
250	static void *aio_proc(void *arg);	497	static void atfork_child (void)
251
252	static void
253	start_thread (void)
254	{	498	{
255	sigset_t fullsigset, oldsigset;	499	create_respipe ();
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}	500	}
271		501
272	static void	502	static SV *
273	send_req (aio_req req)	503	get_cb (SV *cb_sv)
274	{	504	{
275	while (started < wanted && nreqs >= started)	505	HV *st;
276	start_thread ();	506	GV *gvp;
		507	CV *cv;
277		508
278	nreqs++;	509	if (!SvOK (cb_sv))
		510	return 0;
279		511
280	pthread_mutex_lock (&reqlock);	512	cv = sv_2cv (cb_sv, &st, &gvp, 0);
281		513
282	req->next = 0;	514	if (!cv)
		515	croak ("IO::AIO callback must be undef or a CODE reference");
283		516
284	if (reqe)	517	return (SV *)cv;
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}	518	}
306		519
307	static void	520	#define dREQ \
308	end_thread (void)	521	SV *cb_cv; \
309	{
310	aio_req req;	522	aio_req req; \
		523	int req_pri = next_pri; \
		524	next_pri = EIO_PRI_DEFAULT; \
		525	\
		526	cb_cv = get_cb (callback); \
		527	\
311	Newz (0, req, 1, aio_cb);	528	Newz (0, req, 1, eio_req); \
312	req->type = REQ_QUIT;	529	if (!req) \
		530	croak ("out of memory during eio_req allocation"); \
		531	\
		532	req->callback = SvREFCNT_inc (cb_cv); \
		533	req->pri = req_pri
313		534
314	send_req (req);	535	#define REQ_SEND \
315	}	536	PUTBACK; \
		537	req_submit (req); \
		538	SPAGAIN; \
		539	\
		540	if (GIMME_V != G_VOID) \
		541	XPUSHs (req_sv (req, AIO_REQ_KLASS));
316		542
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t	543	static int
370	pread (int fd, void *buf, size_t count, off_t offset)	544	extract_fd (SV *fh, int wr)
371	{	545	{
372	ssize_t res;	546	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
373	off_t ooffset;
374		547
375	pthread_mutex_lock (&preadwritelock);	548	if (fd < 0)
376	ooffset = lseek (fd, 0, SEEK_CUR);	549	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381		550
382	return res;	551	return fd;
383	}	552	}
384		553
385	static ssize_t	554	MODULE = IO::AIO PACKAGE = IO::AIO
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390		555
391	pthread_mutex_lock (&preadwritelock);	556	PROTOTYPES: ENABLE
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397		557
398	return res;	558	BOOT:
399	}	559	{
		560	stash = gv_stashpv ("IO::AIO", 1);
		561
		562	static const struct {
		563	const char *name;
		564	IV iv;
		565	} *civ, const_iv[] = {
		566	# define const_iv(name, value) { # name, (IV) value },
		567	# define const_eio(name) { # name, (IV) EIO_ ## name },
		568	const_iv (EXDEV , EXDEV)
		569	const_iv (ENOSYS , ENOSYS)
		570	const_iv (O_RDONLY, O_RDONLY)
		571	const_iv (O_WRONLY, O_WRONLY)
		572	const_iv (O_CREAT , O_CREAT)
		573	const_iv (O_TRUNC , O_TRUNC)
		574	#ifndef _WIN32
		575	const_iv (S_IFIFO , S_IFIFO)
400	#endif	576	#endif
		577	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		578	const_eio (SYNC_FILE_RANGE_WRITE)
		579	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
401		580
402	#if !HAVE_FDATASYNC	581	const_eio (READDIR_DENTS)
403	# define fdatasync fsync	582	const_eio (READDIR_DIRS_FIRST)
404	#endif	583	const_eio (READDIR_STAT_ORDER)
		584	const_eio (READDIR_FOUND_UNKNOWN)
405		585
406	#if !HAVE_READAHEAD	586	const_eio (DT_UNKNOWN)
407	# define readahead aio_readahead	587	const_eio (DT_FIFO)
408		588	const_eio (DT_CHR)
409	static ssize_t	589	const_eio (DT_DIR)
410	readahead (int fd, off_t offset, size_t count)	590	const_eio (DT_BLK)
411	{	591	const_eio (DT_REG)
412	char readahead_buf[4096];	592	const_eio (DT_LNK)
413		593	const_eio (DT_SOCK)
414	while (count > 0)	594	const_eio (DT_WHT)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}	595	};
484		596
485	# elif __hpux	597	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	598	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
487		599
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# else
505	res = -1;
506	errno = ENOSYS;
507	# endif
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	for (;;)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, 4096, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	}
545	}
546
547	return res;
548	}
549
550	/* read a full directory */
551	static int
552	scandir_ (const char *path, void **namesp)
553	{
554	DIR *dirp = opendir (path);
555	union
556	{
557	struct dirent d;
558	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
559	} u;
560	struct dirent *entp;
561	char *name, *names;
562	int memlen = 4096;
563	int memofs = 0;
564	int res = 0;
565	int errorno;
566
567	if (!dirp)
568	return -1;
569
570	names = malloc (memlen);
571
572	for (;;)
573	{
574	errno = 0, readdir_r (dirp, &u.d, &entp);
575
576	if (!entp)
577	break;
578
579	name = entp->d_name;
580
581	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
582	{
583	int len = strlen (name) + 1;
584
585	res++;
586
587	while (memofs + len > memlen)
588	{
589	memlen *= 2;
590	names = realloc (names, memlen);
591	if (!names)
592	break;
593	}
594
595	memcpy (names + memofs, name, len);
596	memofs += len;
597	}
598	}
599
600	errorno = errno;
601	closedir (dirp);
602
603	if (errorno)
604	{
605	free (names);
606	errno = errorno;
607	res = -1;
608	}
609
610	*namesp = (void *)names;
611	return res;
612	}
613
614	/*****************************************************************************/
615
616	static void *
617	aio_proc (void *thr_arg)
618	{
619	aio_req req;
620	int type;
621
622	do
623	{
624	pthread_mutex_lock (&reqlock);
625
626	for (;;)
627	{
628	req = reqs;
629
630	if (reqs)
631	{
632	reqs = reqs->next;
633	if (!reqs) reqe = 0;
634	}
635
636	if (req)
637	break;
638
639	pthread_cond_wait (&reqwait, &reqlock);
640	}
641
642	pthread_mutex_unlock (&reqlock);
643
644	errno = 0; /* strictly unnecessary */
645
646	type = req->type;
647
648	switch (type)
649	{
650	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
651	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
652
653	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
654	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
655
656	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
657	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
658	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
659
660	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
661	case REQ_CLOSE: req->result = close (req->fd); break;
662	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
663	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
664	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
665
666	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
667	case REQ_FSYNC: req->result = fsync (req->fd); break;
668	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
669
670	case REQ_QUIT:
671	break;
672
673	default:
674	req->result = ENOSYS;
675	break;
676	}
677
678	req->errorno = errno;
679
680	pthread_mutex_lock (&reslock);
681
682	req->next = 0;
683
684	if (rese)
685	{
686	rese->next = req;
687	rese = req;
688	}
689	else
690	{
691	rese = ress = req;
692
693	/* write a dummy byte to the pipe so fh becomes ready */
694	write (respipe [1], &respipe, 1);
695	}
696
697	pthread_mutex_unlock (&reslock);
698	}
699	while (type != REQ_QUIT);
700
701	return 0;
702	}
703
704	/*****************************************************************************/
705
706	static void atfork_prepare (void)
707	{
708	pthread_mutex_lock (&reqlock);
709	pthread_mutex_lock (&reslock);
710	#if !HAVE_PREADWRITE
711	pthread_mutex_lock (&preadwritelock);
712	#endif
713	#if !HAVE_READDIR_R
714	pthread_mutex_lock (&readdirlock);
715	#endif
716	}
717
718	static void atfork_parent (void)
719	{
720	#if !HAVE_READDIR_R
721	pthread_mutex_unlock (&readdirlock);
722	#endif
723	#if !HAVE_PREADWRITE
724	pthread_mutex_unlock (&preadwritelock);
725	#endif
726	pthread_mutex_unlock (&reslock);
727	pthread_mutex_unlock (&reqlock);
728	}
729
730	static void atfork_child (void)
731	{
732	aio_req prv;
733
734	started = 0;
735
736	while (reqs)
737	{
738	prv = reqs;
739	reqs = prv->next;
740	free_req (prv);
741	}
742
743	reqs = reqe = 0;
744
745	while (ress)
746	{
747	prv = ress;
748	ress = prv->next;
749	free_req (prv);
750	}
751
752	ress = rese = 0;
753
754	close (respipe [0]);
755	close (respipe [1]);
756	create_pipe ();	600	create_respipe ();
757		601
758	atfork_parent ();	602	if (eio_init (want_poll, done_poll) < 0)
759	}	603	croak ("IO::AIO: unable to initialise eio library");
760		604
761	#define dREQ \	605	/* atfork child called in fifo order, so before eio's handler */
762	aio_req req; \	606	X_THREAD_ATFORK (0, 0, atfork_child);
763	\
764	if (SvOK (callback) && !SvROK (callback)) \
765	croak ("clalback must be undef or of reference type"); \
766	\
767	Newz (0, req, 1, aio_cb); \
768	if (!req) \
769	croak ("out of memory during aio_req allocation"); \
770	\
771	req->callback = newSVsv (callback);
772
773	MODULE = IO::AIO PACKAGE = IO::AIO
774
775	PROTOTYPES: ENABLE
776
777	BOOT:
778	{
779	create_pipe ();
780	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
781	}	607	}
782		608
783	void	609	void
784	min_parallel(nthreads)	610	max_poll_reqs (int nreqs)
785	int nthreads
786	PROTOTYPE: $	611	PROTOTYPE: $
		612	CODE:
		613	eio_set_max_poll_reqs (nreqs);
787		614
788	void	615	void
789	max_parallel(nthreads)	616	max_poll_time (double nseconds)
790	int nthreads
791	PROTOTYPE: $	617	PROTOTYPE: $
792
793	int
794	max_outstanding(nreqs)
795	int nreqs
796	PROTOTYPE: $
797	CODE:	618	CODE:
798	RETVAL = max_outstanding;	619	eio_set_max_poll_time (nseconds);
		620
		621	void
		622	min_parallel (int nthreads)
		623	PROTOTYPE: $
		624	CODE:
		625	eio_set_min_parallel (nthreads);
		626
		627	void
		628	max_parallel (int nthreads)
		629	PROTOTYPE: $
		630	CODE:
		631	eio_set_max_parallel (nthreads);
		632
		633	void
		634	max_idle (int nthreads)
		635	PROTOTYPE: $
		636	CODE:
		637	eio_set_max_idle (nthreads);
		638
		639	void
		640	max_outstanding (int maxreqs)
		641	PROTOTYPE: $
		642	CODE:
799	max_outstanding = nreqs;	643	max_outstanding = maxreqs;
800		644
801	void	645	void
802	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	646	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
803	SV * pathname
804	int flags
805	int mode
806	SV * callback
807	PROTOTYPE: $$$;$	647	PROTOTYPE: $$$;$
808	CODE:	648	PPCODE:
809	{	649	{
810	dREQ;	650	dREQ;
811		651
812	req->type = REQ_OPEN;	652	req->type = EIO_OPEN;
813	req->data = newSVsv (pathname);	653	req->sv1 = newSVsv (pathname);
814	req->dataptr = SvPVbyte_nolen (req->data);	654	req->ptr1 = SvPVbyte_nolen (req->sv1);
815	req->fd = flags;	655	req->int1 = flags;
816	req->mode = mode;	656	req->int2 = mode;
817		657
818	send_req (req);	658	REQ_SEND;
819	}	659	}
820		660
821	void	661	void
822	aio_close(fh,callback=&PL_sv_undef)	662	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
823	SV * fh
824	SV * callback
825	PROTOTYPE: $;$	663	PROTOTYPE: $;$
826	ALIAS:	664	ALIAS:
827	aio_close = REQ_CLOSE
828	aio_fsync = REQ_FSYNC	665	aio_fsync = EIO_FSYNC
829	aio_fdatasync = REQ_FDATASYNC	666	aio_fdatasync = EIO_FDATASYNC
830	CODE:	667	PPCODE:
831	{	668	{
		669	int fd = extract_fd (fh, 0);
832	dREQ;	670	dREQ;
833		671
834	req->type = ix;	672	req->type = ix;
835	req->fh = newSVsv (fh);	673	req->sv1 = newSVsv (fh);
836	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	674	req->int1 = fd;
837		675
838	send_req (req);	676	REQ_SEND (req);
839	}	677	}
840		678
841	void	679	void
		680	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		681	PROTOTYPE: $$$$;$
		682	PPCODE:
		683	{
		684	int fd = extract_fd (fh, 0);
		685	dREQ;
		686
		687	req->type = EIO_SYNC_FILE_RANGE;
		688	req->sv1 = newSVsv (fh);
		689	req->int1 = fd;
		690	req->offs = SvVAL64 (offset);
		691	req->size = SvVAL64 (nbytes);
		692	req->int2 = flags;
		693
		694	REQ_SEND (req);
		695	}
		696
		697	void
		698	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		699	PROTOTYPE: $;$
		700	PPCODE:
		701	{
		702	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		703	int fd = extract_fd (fh, 0);
		704	dREQ;
		705
		706	if (close_pipe < 0)
		707	{
		708	int pipefd [2];
		709
		710	if (pipe (pipefd) < 0
		711	|| close (pipefd [1]) < 0
		712	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		713	abort (); /*D*/
		714
		715	close_pipe = pipefd [0];
		716	}
		717
		718	req->type = EIO_DUP2;
		719	req->int1 = close_pipe;
		720	req->sv2 = newSVsv (fh);
		721	req->int2 = fd;
		722
		723	REQ_SEND (req);
		724	}
		725
		726	void
842	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	727	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
843	SV * fh
844	UV offset
845	UV length
846	SV * data
847	UV dataoffset
848	SV * callback
849	ALIAS:	728	ALIAS:
850	aio_read = REQ_READ	729	aio_read = EIO_READ
851	aio_write = REQ_WRITE	730	aio_write = EIO_WRITE
852	PROTOTYPE: $$$$$;$	731	PROTOTYPE: $$$$$;$
853	CODE:	732	PPCODE:
854	{	733	{
855	aio_req req;
856	STRLEN svlen;	734	STRLEN svlen;
		735	int fd = extract_fd (fh, ix == EIO_WRITE);
857	char *svptr = SvPVbyte (data, svlen);	736	char *svptr = SvPVbyte (data, svlen);
858		737	UV len = SvUV (length);
859	SvUPGRADE (data, SVt_PV);
860	SvPOK_on (data);
861		738
862	if (dataoffset < 0)	739	if (dataoffset < 0)
863	dataoffset += svlen;	740	dataoffset += svlen;
864		741
865	if (dataoffset < 0 || dataoffset > svlen)	742	if (dataoffset < 0 || dataoffset > svlen)
866	croak ("data offset outside of string");	743	croak ("dataoffset outside of data scalar");
867		744
868	if (ix == REQ_WRITE)	745	if (ix == EIO_WRITE)
869	{	746	{
870	/* write: check length and adjust. */	747	/* write: check length and adjust. */
871	if (length < 0 || length + dataoffset > svlen)	748	if (!SvOK (length) || len + dataoffset > svlen)
872	length = svlen - dataoffset;	749	len = svlen - dataoffset;
873	}	750	}
874	else	751	else
875	{	752	{
876	/* read: grow scalar as necessary */	753	/* read: check type and grow scalar as necessary */
		754	SvUPGRADE (data, SVt_PV);
877	svptr = SvGROW (data, length + dataoffset);	755	svptr = SvGROW (data, len + dataoffset + 1);
878	}	756	}
879
880	if (length < 0)
881	croak ("length must not be negative");
882		757
883	{	758	{
884	dREQ;	759	dREQ;
885		760
886	req->type = ix;	761	req->type = ix;
887	req->fh = newSVsv (fh);	762	req->sv1 = newSVsv (fh);
888	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	763	req->int1 = fd;
889	: IoOFP (sv_2io (fh)));	764	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
890	req->offset = offset;	765	req->size = len;
891	req->length = length;
892	req->data = SvREFCNT_inc (data);	766	req->sv2 = SvREFCNT_inc (data);
893	req->dataptr = (char *)svptr + dataoffset;	767	req->ptr2 = (char *)svptr + dataoffset;
		768	req->stroffset = dataoffset;
894		769
895	if (!SvREADONLY (data))	770	if (!SvREADONLY (data))
896	{	771	{
897	SvREADONLY_on (data);	772	SvREADONLY_on (data);
898	req->data2ptr = (void *)data;	773	req->flags |= FLAG_SV2_RO_OFF;
899	}	774	}
900		775
901	send_req (req);	776	REQ_SEND;
902	}	777	}
903	}	778	}
904		779
905	void	780	void
		781	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		782	PROTOTYPE: $$;$
		783	PPCODE:
		784	{
		785	SV *data;
		786	dREQ;
		787
		788	req->type = EIO_READLINK;
		789	req->sv1 = newSVsv (path);
		790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		791
		792	REQ_SEND;
		793	}
		794
		795	void
906	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	796	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
907	SV * out_fh
908	SV * in_fh
909	UV in_offset
910	UV length
911	SV * callback
912	PROTOTYPE: $$$$;$	797	PROTOTYPE: $$$$;$
913	CODE:	798	PPCODE:
914	{	799	{
		800	int ifd = extract_fd (in_fh , 0);
		801	int ofd = extract_fd (out_fh, 0);
915	dREQ;	802	dREQ;
916		803
917	req->type = REQ_SENDFILE;	804	req->type = EIO_SENDFILE;
918	req->fh = newSVsv (out_fh);	805	req->sv1 = newSVsv (out_fh);
919	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	806	req->int1 = ofd;
920	req->fh2 = newSVsv (in_fh);	807	req->sv2 = newSVsv (in_fh);
921	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	808	req->int2 = ifd;
922	req->offset = in_offset;	809	req->offs = SvVAL64 (in_offset);
923	req->length = length;	810	req->size = length;
924		811
925	send_req (req);	812	REQ_SEND;
926	}	813	}
927		814
928	void	815	void
929	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	816	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
930	SV * fh
931	UV offset
932	IV length
933	SV * callback
934	PROTOTYPE: $$$;$	817	PROTOTYPE: $$$;$
935	CODE:	818	PPCODE:
936	{	819	{
		820	int fd = extract_fd (fh, 0);
937	dREQ;	821	dREQ;
938		822
939	req->type = REQ_READAHEAD;	823	req->type = EIO_READAHEAD;
940	req->fh = newSVsv (fh);	824	req->sv1 = newSVsv (fh);
941	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	825	req->int1 = fd;
942	req->offset = offset;	826	req->offs = SvVAL64 (offset);
943	req->length = length;	827	req->size = length;
944		828
945	send_req (req);	829	REQ_SEND;
946	}	830	}
947		831
948	void	832	void
949	aio_stat(fh_or_path,callback=&PL_sv_undef)	833	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
950	SV * fh_or_path
951	SV * callback
952	ALIAS:	834	ALIAS:
953	aio_stat = REQ_STAT	835	aio_stat = EIO_STAT
954	aio_lstat = REQ_LSTAT	836	aio_lstat = EIO_LSTAT
955	CODE:	837	PPCODE:
956	{	838	{
957	dREQ;	839	dREQ;
958		840
959	New (0, req->statdata, 1, Stat_t);	841	req->sv1 = newSVsv (fh_or_path);
960	if (!req->statdata)
961	{
962	free_req (req);
963	croak ("out of memory during aio_req->statdata allocation");
964	}
965		842
966	if (SvPOK (fh_or_path))	843	if (SvPOK (req->sv1))
967	{	844	{
968	req->type = ix;	845	req->type = ix;
969	req->data = newSVsv (fh_or_path);
970	req->dataptr = SvPVbyte_nolen (req->data);	846	req->ptr1 = SvPVbyte_nolen (req->sv1);
971	}	847	}
972	else	848	else
973	{	849	{
974	req->type = REQ_FSTAT;	850	req->type = EIO_FSTAT;
975	req->fh = newSVsv (fh_or_path);
976	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	851	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		852	}
		853
		854	REQ_SEND;
		855	}
		856
		857	void
		858	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
		862
		863	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		864	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		865	req->sv1 = newSVsv (fh_or_path);
		866
		867	if (SvPOK (req->sv1))
977	}	868	{
		869	req->type = EIO_UTIME;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FUTIME;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
978		877
979	send_req (req);	878	REQ_SEND;
980	}	879	}
981		880
982	void	881	void
		882	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->sv1 = newSVsv (fh_or_path);
		888	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = EIO_TRUNCATE;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FTRUNCATE;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		906	ALIAS:
		907	aio_chmod = EIO_CHMOD
		908	aio_mkdir = EIO_MKDIR
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = mode;
		914	req->sv1 = newSVsv (fh_or_path);
		915
		916	if (SvPOK (req->sv1))
		917	{
		918	req->type = ix;
		919	req->ptr1 = SvPVbyte_nolen (req->sv1);
		920	}
		921	else
		922	{
		923	req->type = EIO_FCHMOD;
		924	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		925	}
		926
		927	REQ_SEND;
		928	}
		929
		930	void
		931	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		932	PPCODE:
		933	{
		934	dREQ;
		935
		936	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		937	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		938	req->sv1 = newSVsv (fh_or_path);
		939
		940	if (SvPOK (req->sv1))
		941	{
		942	req->type = EIO_CHOWN;
		943	req->ptr1 = SvPVbyte_nolen (req->sv1);
		944	}
		945	else
		946	{
		947	req->type = EIO_FCHOWN;
		948	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		949	}
		950
		951	REQ_SEND;
		952	}
		953
		954	void
		955	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		956	PPCODE:
		957	{
		958	dREQ;
		959
		960	req->type = EIO_READDIR;
		961	req->sv1 = newSVsv (pathname);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		964
		965	if (flags & EIO_READDIR_DENTS)
		966	req->int1 |= EIO_READDIR_CUSTOM2;
		967
		968	REQ_SEND;
		969	}
		970
		971	void
983	aio_unlink(pathname,callback=&PL_sv_undef)	972	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
984	SV * pathname
985	SV * callback
986	ALIAS:	973	ALIAS:
987	aio_unlink = REQ_UNLINK	974	aio_unlink = EIO_UNLINK
988	aio_rmdir = REQ_RMDIR	975	aio_rmdir = EIO_RMDIR
		976	aio_readdir = EIO_READDIR
989	CODE:	977	PPCODE:
990	{	978	{
991	dREQ;	979	dREQ;
992		980
993	req->type = ix;	981	req->type = ix;
994	req->data = newSVsv (pathname);	982	req->sv1 = newSVsv (pathname);
995	req->dataptr = SvPVbyte_nolen (req->data);	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984
		985	REQ_SEND;
		986	}
		987
		988	void
		989	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		990	ALIAS:
		991	aio_link = EIO_LINK
		992	aio_symlink = EIO_SYMLINK
		993	aio_rename = EIO_RENAME
		994	PPCODE:
		995	{
		996	dREQ;
996		997
997	send_req (req);	998	req->type = ix;
998	}	999	req->sv1 = newSVsv (oldpath);
999		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
1000	void	1001	req->sv2 = newSVsv (newpath);
1001	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1002	req->ptr2 = SvPVbyte_nolen (req->sv2);
1002	SV * oldpath
1003	SV * newpath
1004	SV * callback
1005	CODE:
1006	{
1007	dREQ;
1008		1003
1009	req->type = REQ_SYMLINK;	1004	REQ_SEND;
1010	req->fh = newSVsv (oldpath);	1005	}
1011	req->data2ptr = SvPVbyte_nolen (req->fh);	1006
1012	req->data = newSVsv (newpath);	1007	void
1013	req->dataptr = SvPVbyte_nolen (req->data);	1008	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1009	PPCODE:
		1010	{
		1011	dREQ;
1014		1012
1015	send_req (req);	1013	req->type = EIO_MKNOD;
1016	}	1014	req->sv1 = newSVsv (pathname);
1017		1015	req->ptr1 = SvPVbyte_nolen (req->sv1);
1018	void	1016	req->int2 = (mode_t)mode;
1019	aio_readdir(pathname,callback=&PL_sv_undef)	1017	req->offs = dev;
1020	SV * pathname
1021	SV * callback
1022	CODE:
1023	{
1024	dREQ;
1025		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_BUSY;
		1029	req->nv1 = delay < 0. ? 0. : delay;
		1030
		1031	REQ_SEND;
		1032	}
		1033
		1034	void
		1035	aio_group (SV *callback=&PL_sv_undef)
		1036	PROTOTYPE: ;$
		1037	PPCODE:
		1038	{
		1039	dREQ;
		1040
		1041	req->type = EIO_GROUP;
		1042
		1043	req_submit (req);
		1044	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1045	}
		1046
		1047	void
		1048	aio_nop (SV *callback=&PL_sv_undef)
		1049	ALIAS:
		1050	aio_nop = EIO_NOP
		1051	aio_sync = EIO_SYNC
		1052	PPCODE:
		1053	{
		1054	dREQ;
		1055
1026	req->type = REQ_READDIR;	1056	req->type = ix;
1027	req->data = newSVsv (pathname);
1028	req->dataptr = SvPVbyte_nolen (req->data);
1029
1030	send_req (req);
1031	}
1032		1057
		1058	REQ_SEND;
		1059	}
		1060
		1061	int
		1062	aioreq_pri (int pri = 0)
		1063	PROTOTYPE: ;$
		1064	CODE:
		1065	RETVAL = next_pri;
		1066	if (items > 0)
		1067	{
		1068	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1069	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1070	next_pri = pri;
		1071	}
		1072	OUTPUT:
		1073	RETVAL
		1074
1033	void	1075	void
		1076	aioreq_nice (int nice = 0)
		1077	CODE:
		1078	nice = next_pri - nice;
		1079	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1080	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1081	next_pri = nice;
		1082
		1083	void
1034	flush()	1084	flush ()
1035	PROTOTYPE:	1085	PROTOTYPE:
1036	CODE:	1086	CODE:
1037	while (nreqs)	1087	while (eio_nreqs ())
1038	{	1088	{
1039	poll_wait ();	1089	poll_wait ();
1040	poll_cb ();	1090	poll_cb ();
1041	}	1091	}
1042		1092
1043	void	1093	int
1044	poll()	1094	poll()
1045	PROTOTYPE:	1095	PROTOTYPE:
1046	CODE:	1096	CODE:
1047	if (nreqs)
1048	{
1049	poll_wait ();	1097	poll_wait ();
1050	poll_cb ();	1098	RETVAL = poll_cb ();
1051	}	1099	OUTPUT:
		1100	RETVAL
1052		1101
1053	int	1102	int
1054	poll_fileno()	1103	poll_fileno()
1055	PROTOTYPE:	1104	PROTOTYPE:
1056	CODE:	1105	CODE:
…		…
1068		1117
1069	void	1118	void
1070	poll_wait()	1119	poll_wait()
1071	PROTOTYPE:	1120	PROTOTYPE:
1072	CODE:	1121	CODE:
1073	if (nreqs)
1074	poll_wait ();	1122	poll_wait ();
1075		1123
1076	int	1124	int
1077	nreqs()	1125	nreqs()
1078	PROTOTYPE:	1126	PROTOTYPE:
1079	CODE:	1127	CODE:
1080	RETVAL = nreqs;	1128	RETVAL = eio_nreqs ();
1081	OUTPUT:	1129	OUTPUT:
1082	RETVAL	1130	RETVAL
1083		1131
		1132	int
		1133	nready()
		1134	PROTOTYPE:
		1135	CODE:
		1136	RETVAL = eio_nready ();
		1137	OUTPUT:
		1138	RETVAL
		1139
		1140	int
		1141	npending()
		1142	PROTOTYPE:
		1143	CODE:
		1144	RETVAL = eio_npending ();
		1145	OUTPUT:
		1146	RETVAL
		1147
		1148	int
		1149	nthreads()
		1150	PROTOTYPE:
		1151	CODE:
		1152	RETVAL = eio_nthreads ();
		1153	OUTPUT:
		1154	RETVAL
		1155
		1156	void _on_next_submit (SV *cb)
		1157	CODE:
		1158	SvREFCNT_dec (on_next_submit);
		1159	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1160
		1161	PROTOTYPES: DISABLE
		1162
		1163	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1164
		1165	void
		1166	cancel (aio_req_ornot req)
		1167	CODE:
		1168	eio_cancel (req);
		1169
		1170	void
		1171	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1172	PPCODE:
		1173	{
		1174	if (GIMME_V != G_VOID)
		1175	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1176
		1177	if (items > 1)
		1178	{
		1179	SV *cb_cv = get_cb (callback);
		1180
		1181	SvREFCNT_dec (req->callback);
		1182	req->callback = SvREFCNT_inc (cb_cv);
		1183	}
		1184	}
		1185
		1186	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1187
		1188	void
		1189	add (aio_req grp, ...)
		1190	PPCODE:
		1191	{
		1192	int i;
		1193
		1194	if (grp->int1 == 2)
		1195	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1196
		1197	for (i = 1; i < items; ++i )
		1198	{
		1199	aio_req req;
		1200
		1201	if (GIMME_V != G_VOID)
		1202	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1203
		1204	req = SvAIO_REQ (ST (i));
		1205
		1206	if (req)
		1207	eio_grp_add (grp, req);
		1208	}
		1209	}
		1210
		1211	void
		1212	cancel_subs (aio_req_ornot req)
		1213	CODE:
		1214	req_cancel_subs (req);
		1215
		1216	void
		1217	result (aio_req grp, ...)
		1218	CODE:
		1219	{
		1220	int i;
		1221	AV *av;
		1222
		1223	grp->errorno = errno;
		1224
		1225	av = newAV ();
		1226	av_extend (av, items - 1);
		1227
		1228	for (i = 1; i < items; ++i )
		1229	av_push (av, newSVsv (ST (i)));
		1230
		1231	SvREFCNT_dec (grp->sv1);
		1232	grp->sv1 = (SV *)av;
		1233	}
		1234
		1235	void
		1236	errno (aio_req grp, int errorno = errno)
		1237	CODE:
		1238	grp->errorno = errorno;
		1239
		1240	void
		1241	limit (aio_req grp, int limit)
		1242	CODE:
		1243	eio_grp_limit (grp, limit);
		1244
		1245	void
		1246	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1247	CODE:
		1248	{
		1249	SvREFCNT_dec (grp->sv2);
		1250	grp->sv2 = newSVsv (callback);
		1251	grp->feed = aio_grp_feed;
		1252
		1253	if (grp->int2 <= 0)
		1254	grp->int2 = 2;
		1255
		1256	eio_grp_limit (grp, grp->int2);
		1257	}
		1258

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