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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.33 by root, Mon Aug 22 23:21:57 2005 UTC vs.
Revision 1.156 by root, Thu Nov 12 00:01:52 2009 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9		10
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14
15	#include <unistd.h>	16	#include <limits.h>
16	#include <fcntl.h>	17	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	18	#include <sched.h>
19		19
20	#if HAVE_SENDFILE	20	/* perl namespace pollution */
21	# if __linux	21	#undef VERSION
22	# include <sys/sendfile.h>	22
23	# elif __freebsd	23	#ifdef _WIN32
24	# include <sys/socket.h>	24
		25	# define EIO_STRUCT_DIRENT Direntry_t
		26	# undef malloc
		27	# undef free
		28
		29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
		61	#else
		62
25	# include <sys/uio.h>	63	# include <sys/time.h>
26	# elif __hpux
27	# include <sys/socket.h>	64	# include <sys/select.h>
28	# endif	65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
29	#endif	70	#endif
30		71
31	#if __ia64	72	/* perl stupidly overrides readdir and maybe others */
32	# define STACKSIZE 65536	73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
33	#else	85	#else
34	# define STACKSIZE 4096	86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
35	#endif	89	#endif
36		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
37	enum {	150	enum {
38	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	152	};
47		153
48	typedef struct aio_cb {	154	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		155
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
		157	typedef eio_req *aio_req_ornot;
68		158
69	static int started, wanted;	159	static SV *on_next_submit;
70	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	161	static int max_outstanding;
72	static int respipe [2];
73		162
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static s_epipe respipe;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		164
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	166	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
		179
		180	/* must be called at most once */
		181	static SV *req_sv (aio_req req, HV *stash)
		182	{
		183	if (!req->self)
		184	{
		185	req->self = (SV *)newHV ();
		186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		187	}
		188
		189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		190	}
		191
		192	static aio_req SvAIO_REQ (SV *sv)
		193	{
		194	MAGIC *mg;
		195
		196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		200	croak ("object of class IO::AIO::REQ expected");
		201
		202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		203
		204	return mg ? (aio_req)mg->mg_ptr : 0;
		205	}
		206
		207	static void aio_grp_feed (aio_req grp)
		208	{
		209	if (grp->sv2 && SvOK (grp->sv2))
		210	{
		211	dSP;
		212
		213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, aio_grp_stash));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
		222	}
		223	}
		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
		242	static int req_invoke (eio_req *req)
		243	{
		244	dSP;
		245
		246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
		250	{
		251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
		255
		256	switch (req->type)
		257	{
		258	case EIO_READDIR:
		259	{
		260	SV *rv = &PL_sv_undef;
		261
		262	if (req->result >= 0)
		263	{
		264	int i;
		265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		267	AV *av = newAV ();
		268
		269	av_extend (av, req->result - 1);
		270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
		305	names += SvCUR (name) + 1;
		306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
		310	}
		311
		312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		316	}
		317	break;
		318
		319	case EIO_OPEN:
		320	{
		321	/* convert fd to fh */
		322	SV *fh = &PL_sv_undef;
		323
		324	if (req->result >= 0)
		325	{
		326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, aio_stash, sym, symlen, 0);
		333
		334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
		346	PUSHs (fh);
		347	}
		348	break;
		349
		350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
		396
		397	default:
		398	PUSHs (sv_2mortal (newSViv (req->result)));
		399	break;
		400	}
		401
		402	errno = req->errorno;
		403
		404	PUTBACK;
		405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		406	SPAGAIN;
		407
		408	FREETMPS;
		409	LEAVE;
		410
		411	PUTBACK;
		412	}
		413
		414	return !!SvTRUE (ERRSV);
		415	}
		416
		417	static void req_destroy (aio_req req)
		418	{
86	if (req->fh)	419	if (req->self)
		420	{
		421	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	422	SvREFCNT_dec (req->self);
		423	}
88		424
89	if (req->fh2)	425	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
97		428
98	Safefree (req);	429	Safefree (req);
99	}	430	}
100		431
		432	static void req_cancel_subs (aio_req grp)
		433	{
		434	aio_req sub;
		435
		436	if (grp->type != EIO_GROUP)
		437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
		443	}
		444
101	static void	445	static void
102	poll_wait ()	446	create_respipe (void)
103	{	447	{
104	if (nreqs && !ress)	448	if (s_epipe_renew (&respipe))
		449	croak ("IO::AIO: unable to initialize result pipe");
		450	}
		451
		452	static void poll_wait (void)
		453	{
		454	while (eio_nreqs ())
105	{	455	{
106	fd_set rfd;	456	int size;
107	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);
109		457
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	458	X_LOCK (reslock);
		459	size = res_queue.size;
		460	X_UNLOCK (reslock);
		461
		462	if (size)
		463	return;
		464
		465	etp_maybe_start_thread ();
		466
		467	s_epipe_wait (&respipe);
111	}	468	}
112	}	469	}
113		470
114	static int	471	static int poll_cb (void)
115	poll_cb ()
116	{	472	{
117	dSP;
118	int count = 0;
119	int do_croak = 0;
120	aio_req req;
121
122	for (;;)	473	for (;;)
123	{	474	{
124	pthread_mutex_lock (&reslock);	475	int res = eio_poll ();
125	req = ress;
126		476
127	if (req)	477	if (res > 0)
128	{
129	ress = req->next;
130
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);	478	croak (0);
198	}
199	}
200		479
201	LEAVE;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
202		482
203	errno = errorno;	483	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	484	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	485	}
329		486
330	static void atfork_child (void)	487	static void atfork_child (void)
331	{	488	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();	489	create_respipe ();
357
358	atfork_parent ();
359	}	490	}
360		491
361	/*****************************************************************************/	492	static SV *
362	/* work around various missing functions */	493	get_cb (SV *cb_sv)
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	494	{
378	ssize_t res;	495	SvGETMAGIC (cb_sv);
379	off_t ooffset;	496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
380
381	pthread_mutex_lock (&iolock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387
388	return res;
389	}	497	}
390		498
391	static ssize_t	499	#define dREQ \
392	pwrite (int fd, void *buf, size_t count, off_t offset)	500	SV *cb_cv; \
393	{	501	aio_req req; \
394	ssize_t res;	502	int req_pri = next_pri; \
395	off_t ooffset;	503	next_pri = EIO_PRI_DEFAULT; \
		504	\
		505	cb_cv = get_cb (callback); \
		506	\
		507	Newz (0, req, 1, eio_req); \
		508	if (!req) \
		509	croak ("out of memory during eio_req allocation"); \
		510	\
		511	req->callback = SvREFCNT_inc (cb_cv); \
		512	req->pri = req_pri
396		513
397	pthread_mutex_lock (&iolock);	514	#define REQ_SEND \
398	ooffset = lseek (fd, 0, SEEK_CUR);	515	PUTBACK; \
399	lseek (fd, offset, SEEK_SET);	516	req_submit (req); \
400	res = write (fd, buf, count);	517	SPAGAIN; \
401	lseek (fd, offset, SEEK_SET);	518	\
402	pthread_mutex_unlock (&iolock);	519	if (GIMME_V != G_VOID) \
		520	XPUSHs (req_sv (req, aio_req_stash));
403		521
404	return res;	522	MODULE = IO::AIO PACKAGE = IO::AIO
405	}	523
		524	PROTOTYPES: ENABLE
		525
		526	BOOT:
		527	{
		528	static const struct {
		529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
406	#endif	542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
407		549
408	#if !HAVE_FDATASYNC	550	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
409	# define fdatasync fsync	551	const_eio (SYNC_FILE_RANGE_WRITE)
410	#endif	552	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
411		553
412	#if !HAVE_READAHEAD	554	const_eio (READDIR_DENTS)
413	# define readahead aio_readahead	555	const_eio (READDIR_DIRS_FIRST)
		556	const_eio (READDIR_STAT_ORDER)
		557	const_eio (READDIR_FOUND_UNKNOWN)
414		558
415	static char readahead_buf[4096];	559	const_eio (DT_UNKNOWN)
416		560	const_eio (DT_FIFO)
417	static ssize_t	561	const_eio (DT_CHR)
418	readahead (int fd, off_t offset, size_t count)	562	const_eio (DT_DIR)
419	{	563	const_eio (DT_BLK)
420	while (count > 0)	564	const_eio (DT_REG)
421	{	565	const_eio (DT_LNK)
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	566	const_eio (DT_SOCK)
423		567	const_eio (DT_WHT)
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	/* maybe on others, too, as usual, the manpage leaves you guessing */
456	res = sbytes;
457	}	568	};
458		569
459	#elif __hpux	570	aio_stash = gv_stashpv ("IO::AIO" , 1);
460	res = sendfile (ofd, ifd, offset, count, 0, 0);	571	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		572	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
461		573
462	#else	574	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
463	res = -1;	575	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
464	errno = ENOSYS;
465	#endif
466		576
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
468	{
469	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);
471	res = 0;
472
473	for (;;)
474	{
475	ssize_t cnt;
476
477	cnt = pread (ifd, buf, 4096, offset);
478
479	if (cnt <= 0)
480	{
481	if (cnt && !res) res = -1;
482	break;
483	}
484
485	cnt = write (ofd, buf, cnt);
486
487	if (cnt <= 0)
488	{
489	if (cnt && !res) res = -1;
490	break;
491	}
492
493	offset += cnt;
494	res += cnt;
495	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}
503
504	return res;
505	}
506
507	/*****************************************************************************/
508
509	static void *
510	aio_proc (void *thr_arg)
511	{
512	aio_req req;
513	int type;
514
515	do
516	{
517	pthread_mutex_lock (&reqlock);
518
519	for (;;)
520	{
521	req = reqs;
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528
529	if (req)
530	break;
531
532	pthread_cond_wait (&reqwait, &reqlock);
533	}
534
535	pthread_mutex_unlock (&reqlock);
536
537	errno = 0; /* strictly unnecessary */
538
539	type = req->type;
540
541	switch (type)
542	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
544	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
547	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
548
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;
561
562	case REQ_QUIT:
563	break;
564
565	default:
566	req->result = ENOSYS;
567	break;
568	}
569
570	req->errorno = errno;
571
572	pthread_mutex_lock (&reslock);
573
574	req->next = 0;
575
576	if (rese)
577	{
578	rese->next = req;
579	rese = req;
580	}
581	else
582	{
583	rese = ress = req;
584
585	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);
587	}
588
589	pthread_mutex_unlock (&reslock);
590	}
591	while (type != REQ_QUIT);
592
593	return 0;
594	}
595
596	#define dREQ \
597	aio_req req; \
598	\
599	if (SvOK (callback) && !SvROK (callback)) \
600	croak ("clalback must be undef or of reference type"); \
601	\
602	Newz (0, req, 1, aio_cb); \
603	if (!req) \
604	croak ("out of memory during aio_req allocation"); \
605	\
606	req->callback = newSVsv (callback);
607
608	MODULE = IO::AIO PACKAGE = IO::AIO
609
610	PROTOTYPES: ENABLE
611
612	BOOT:
613	{
614	create_pipe ();	577	create_respipe ();
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}
617		578
		579	if (eio_init (want_poll, done_poll) < 0)
		580	croak ("IO::AIO: unable to initialise eio library");
		581
		582	/* atfork child called in fifo order, so before eio's handler */
		583	X_THREAD_ATFORK (0, 0, atfork_child);
		584	}
		585
618	void	586	void
619	min_parallel(nthreads)	587	max_poll_reqs (int nreqs)
620	int nthreads
621	PROTOTYPE: $	588	PROTOTYPE: $
		589	CODE:
		590	eio_set_max_poll_reqs (nreqs);
622		591
623	void	592	void
624	max_parallel(nthreads)	593	max_poll_time (double nseconds)
625	int nthreads
626	PROTOTYPE: $	594	PROTOTYPE: $
627
628	int
629	max_outstanding(nreqs)
630	int nreqs
631	PROTOTYPE: $
632	CODE:	595	CODE:
633	RETVAL = max_outstanding;	596	eio_set_max_poll_time (nseconds);
		597
		598	void
		599	min_parallel (int nthreads)
		600	PROTOTYPE: $
		601	CODE:
		602	eio_set_min_parallel (nthreads);
		603
		604	void
		605	max_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_max_parallel (nthreads);
		609
		610	void
		611	max_idle (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_idle (nthreads);
		615
		616	void
		617	max_outstanding (int maxreqs)
		618	PROTOTYPE: $
		619	CODE:
634	max_outstanding = nreqs;	620	max_outstanding = maxreqs;
635		621
636	void	622	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	623	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
638	SV * pathname
639	int flags
640	int mode
641	SV * callback
642	PROTOTYPE: $$$;$	624	PROTOTYPE: $$$;$
643	CODE:	625	PPCODE:
644	{	626	{
645	dREQ;	627	dREQ;
646		628
647	req->type = REQ_OPEN;	629	req->type = EIO_OPEN;
648	req->data = newSVsv (pathname);	630	req->sv1 = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	631	req->ptr1 = SvPVbyte_nolen (req->sv1);
650	req->fd = flags;	632	req->int1 = flags;
651	req->mode = mode;	633	req->int2 = mode;
652		634
653	send_req (req);	635	REQ_SEND;
654	}	636	}
655		637
656	void	638	void
657	aio_close(fh,callback=&PL_sv_undef)	639	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
658	SV * fh
659	SV * callback
660	PROTOTYPE: $;$	640	PROTOTYPE: $;$
661	ALIAS:	641	ALIAS:
662	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	642	aio_fsync = EIO_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	643	aio_fdatasync = EIO_FDATASYNC
665	CODE:	644	PPCODE:
666	{	645	{
		646	int fd = s_fileno_croak (fh, 0);
667	dREQ;	647	dREQ;
668		648
669	req->type = ix;	649	req->type = ix;
670	req->fh = newSVsv (fh);	650	req->sv1 = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	651	req->int1 = fd;
672		652
673	send_req (req);	653	REQ_SEND (req);
674	}	654	}
675		655
676	void	656	void
		657	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$$$;$
		659	PPCODE:
		660	{
		661	int fd = s_fileno_croak (fh, 0);
		662	dREQ;
		663
		664	req->type = EIO_SYNC_FILE_RANGE;
		665	req->sv1 = newSVsv (fh);
		666	req->int1 = fd;
		667	req->offs = offset;
		668	req->size = nbytes;
		669	req->int2 = flags;
		670
		671	REQ_SEND (req);
		672	}
		673
		674	void
		675	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		676	PROTOTYPE: $;$
		677	PPCODE:
		678	{
		679	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		680	int fd = s_fileno_croak (fh, 0);
		681	dREQ;
		682
		683	if (close_pipe < 0)
		684	{
		685	int pipefd [2];
		686
		687	if (pipe (pipefd) < 0
		688	|| close (pipefd [1]) < 0
		689	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		690	abort (); /*D*/
		691
		692	close_pipe = pipefd [0];
		693	}
		694
		695	req->type = EIO_DUP2;
		696	req->int1 = close_pipe;
		697	req->sv2 = newSVsv (fh);
		698	req->int2 = fd;
		699
		700	REQ_SEND (req);
		701	}
		702
		703	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	704	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
678	SV * fh
679	UV offset
680	UV length
681	SV * data
682	UV dataoffset
683	SV * callback
684	ALIAS:	705	ALIAS:
685	aio_read = REQ_READ	706	aio_read = EIO_READ
686	aio_write = REQ_WRITE	707	aio_write = EIO_WRITE
687	PROTOTYPE: $$$$$;$	708	PROTOTYPE: $$$$$;$
688	CODE:	709	PPCODE:
689	{	710	{
690	aio_req req;
691	STRLEN svlen;	711	STRLEN svlen;
		712	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
692	char *svptr = SvPVbyte (data, svlen);	713	char *svptr = SvPVbyte (data, svlen);
693		714	UV len = SvUV (length);
694	SvUPGRADE (data, SVt_PV);
695	SvPOK_on (data);
696		715
697	if (dataoffset < 0)	716	if (dataoffset < 0)
698	dataoffset += svlen;	717	dataoffset += svlen;
699		718
700	if (dataoffset < 0 || dataoffset > svlen)	719	if (dataoffset < 0 || dataoffset > svlen)
701	croak ("data offset outside of string");	720	croak ("dataoffset outside of data scalar");
702		721
703	if (ix == REQ_WRITE)	722	if (ix == EIO_WRITE)
704	{	723	{
705	/* write: check length and adjust. */	724	/* write: check length and adjust. */
706	if (length < 0 || length + dataoffset > svlen)	725	if (!SvOK (length) || len + dataoffset > svlen)
707	length = svlen - dataoffset;	726	len = svlen - dataoffset;
708	}	727	}
709	else	728	else
710	{	729	{
711	/* read: grow scalar as necessary */	730	/* read: check type and grow scalar as necessary */
		731	SvUPGRADE (data, SVt_PV);
712	svptr = SvGROW (data, length + dataoffset);	732	svptr = SvGROW (data, len + dataoffset + 1);
713	}	733	}
714
715	if (length < 0)
716	croak ("length must not be negative");
717		734
718	{	735	{
719	dREQ;	736	dREQ;
720		737
721	req->type = ix;	738	req->type = ix;
722	req->fh = newSVsv (fh);	739	req->sv1 = newSVsv (fh);
723	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	740	req->int1 = fd;
724	: IoOFP (sv_2io (fh)));	741	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
725	req->offset = offset;	742	req->size = len;
726	req->length = length;
727	req->data = SvREFCNT_inc (data);	743	req->sv2 = SvREFCNT_inc (data);
728	req->dataptr = (char *)svptr + dataoffset;	744	req->ptr2 = (char *)svptr + dataoffset;
		745	req->stroffset = dataoffset;
729		746
730	if (!SvREADONLY (data))	747	if (!SvREADONLY (data))
731	{	748	{
732	SvREADONLY_on (data);	749	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	750	req->flags |= FLAG_SV2_RO_OFF;
734	}	751	}
735		752
736	send_req (req);	753	REQ_SEND;
737	}	754	}
738	}	755	}
739		756
740	void	757	void
		758	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		759	PROTOTYPE: $$;$
		760	PPCODE:
		761	{
		762	SV *data;
		763	dREQ;
		764
		765	req->type = EIO_READLINK;
		766	req->sv1 = newSVsv (path);
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768
		769	REQ_SEND;
		770	}
		771
		772	void
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	773	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
742	SV * out_fh
743	SV * in_fh
744	UV in_offset
745	UV length
746	SV * callback
747	PROTOTYPE: $$$$;$	774	PROTOTYPE: $$$$;$
748	CODE:	775	PPCODE:
749	{	776	{
		777	int ifd = s_fileno_croak (in_fh , 0);
		778	int ofd = s_fileno_croak (out_fh, 1);
750	dREQ;	779	dREQ;
751		780
752	req->type = REQ_SENDFILE;	781	req->type = EIO_SENDFILE;
753	req->fh = newSVsv (out_fh);	782	req->sv1 = newSVsv (out_fh);
754	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	783	req->int1 = ofd;
755	req->fh2 = newSVsv (in_fh);	784	req->sv2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	785	req->int2 = ifd;
757	req->offset = in_offset;	786	req->offs = in_offset;
758	req->length = length;	787	req->size = length;
759		788
760	send_req (req);	789	REQ_SEND;
761	}	790	}
762		791
763	void	792	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	793	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
765	SV * fh
766	UV offset
767	IV length
768	SV * callback
769	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
770	CODE:	795	PPCODE:
771	{	796	{
		797	int fd = s_fileno_croak (fh, 0);
772	dREQ;	798	dREQ;
773		799
774	req->type = REQ_READAHEAD;	800	req->type = EIO_READAHEAD;
775	req->fh = newSVsv (fh);	801	req->sv1 = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	802	req->int1 = fd;
777	req->offset = offset;	803	req->offs = offset;
778	req->length = length;	804	req->size = length;
779		805
780	send_req (req);	806	REQ_SEND;
781	}	807	}
782		808
783	void	809	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	810	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
785	SV * fh_or_path
786	SV * callback
787	ALIAS:	811	ALIAS:
788	aio_stat = REQ_STAT	812	aio_stat = EIO_STAT
789	aio_lstat = REQ_LSTAT	813	aio_lstat = EIO_LSTAT
790	CODE:	814	PPCODE:
791	{	815	{
792	dREQ;	816	dREQ;
793		817
794	New (0, req->statdata, 1, Stat_t);	818	req->sv1 = newSVsv (fh_or_path);
795	if (!req->statdata)
796	{
797	free_req (req);
798	croak ("out of memory during aio_req->statdata allocation");
799	}
800		819
801	if (SvPOK (fh_or_path))	820	if (SvPOK (req->sv1))
802	{	821	{
803	req->type = ix;	822	req->type = ix;
804	req->data = newSVsv (fh_or_path);
805	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
806	}	824	}
807	else	825	else
808	{	826	{
809	req->type = REQ_FSTAT;	827	req->type = EIO_FSTAT;
810	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		829	}
		830
		831	REQ_SEND;
		832	}
		833
		834	void
		835	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		841	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
812	}	845	{
		846	req->type = EIO_UTIME;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FUTIME;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
813		854
814	send_req (req);	855	REQ_SEND;
815	}	856	}
816		857
817	void	858	void
		859	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		860	PPCODE:
		861	{
		862	dREQ;
		863
		864	req->sv1 = newSVsv (fh_or_path);
		865	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_TRUNCATE;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FTRUNCATE;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		883	ALIAS:
		884	aio_chmod = EIO_CHMOD
		885	aio_mkdir = EIO_MKDIR
		886	PPCODE:
		887	{
		888	dREQ;
		889
		890	req->int2 = mode;
		891	req->sv1 = newSVsv (fh_or_path);
		892
		893	if (SvPOK (req->sv1))
		894	{
		895	req->type = ix;
		896	req->ptr1 = SvPVbyte_nolen (req->sv1);
		897	}
		898	else
		899	{
		900	req->type = EIO_FCHMOD;
		901	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		902	}
		903
		904	REQ_SEND;
		905	}
		906
		907	void
		908	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		914	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		915	req->sv1 = newSVsv (fh_or_path);
		916
		917	if (SvPOK (req->sv1))
		918	{
		919	req->type = EIO_CHOWN;
		920	req->ptr1 = SvPVbyte_nolen (req->sv1);
		921	}
		922	else
		923	{
		924	req->type = EIO_FCHOWN;
		925	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		926	}
		927
		928	REQ_SEND;
		929	}
		930
		931	void
		932	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		933	PPCODE:
		934	{
		935	dREQ;
		936
		937	req->type = EIO_READDIR;
		938	req->sv1 = newSVsv (pathname);
		939	req->ptr1 = SvPVbyte_nolen (req->sv1);
		940	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		941
		942	if (flags & EIO_READDIR_DENTS)
		943	req->int1 |= EIO_READDIR_CUSTOM2;
		944
		945	REQ_SEND;
		946	}
		947
		948	void
818	aio_unlink(pathname,callback=&PL_sv_undef)	949	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
819	SV * pathname
820	SV * callback
821	ALIAS:	950	ALIAS:
822	aio_unlink = REQ_UNLINK	951	aio_unlink = EIO_UNLINK
823	aio_rmdir = REQ_RMDIR	952	aio_rmdir = EIO_RMDIR
		953	aio_readdir = EIO_READDIR
824	CODE:	954	PPCODE:
825	{	955	{
826	dREQ;	956	dREQ;
827		957
828	req->type = ix;	958	req->type = ix;
829	req->data = newSVsv (pathname);	959	req->sv1 = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	960	req->ptr1 = SvPVbyte_nolen (req->sv1);
		961
		962	REQ_SEND;
		963	}
		964
		965	void
		966	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		967	ALIAS:
		968	aio_link = EIO_LINK
		969	aio_symlink = EIO_SYMLINK
		970	aio_rename = EIO_RENAME
		971	PPCODE:
		972	{
		973	dREQ;
831		974
832	send_req (req);	975	req->type = ix;
833	}	976	req->sv1 = newSVsv (oldpath);
834		977	req->ptr1 = SvPVbyte_nolen (req->sv1);
835	void	978	req->sv2 = newSVsv (newpath);
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	979	req->ptr2 = SvPVbyte_nolen (req->sv2);
837	SV * oldpath
838	SV * newpath
839	SV * callback
840	CODE:
841	{
842	dREQ;
843		980
844	req->type = REQ_SYMLINK;	981	REQ_SEND;
845	req->fh = newSVsv (oldpath);	982	}
846	req->data2ptr = SvPVbyte_nolen (req->fh);	983
847	req->data = newSVsv (newpath);	984	void
848	req->dataptr = SvPVbyte_nolen (req->data);	985	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		986	PPCODE:
		987	{
		988	dREQ;
849		989
850	send_req (req);	990	req->type = EIO_MKNOD;
		991	req->sv1 = newSVsv (pathname);
		992	req->ptr1 = SvPVbyte_nolen (req->sv1);
		993	req->int2 = (mode_t)mode;
		994	req->offs = dev;
		995
		996	REQ_SEND;
851	}	997	}
852		998
853	void	999	void
		1000	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1001	PPCODE:
		1002	{
		1003	dREQ;
		1004
		1005	req->type = EIO_BUSY;
		1006	req->nv1 = delay < 0. ? 0. : delay;
		1007
		1008	REQ_SEND;
		1009	}
		1010
		1011	void
		1012	aio_group (SV *callback=&PL_sv_undef)
		1013	PROTOTYPE: ;$
		1014	PPCODE:
		1015	{
		1016	dREQ;
		1017
		1018	req->type = EIO_GROUP;
		1019
		1020	req_submit (req);
		1021	XPUSHs (req_sv (req, aio_grp_stash));
		1022	}
		1023
		1024	void
		1025	aio_nop (SV *callback=&PL_sv_undef)
		1026	ALIAS:
		1027	aio_nop = EIO_NOP
		1028	aio_sync = EIO_SYNC
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->type = ix;
		1034
		1035	REQ_SEND;
		1036	}
		1037
		1038	int
		1039	aioreq_pri (int pri = 0)
		1040	PROTOTYPE: ;$
		1041	CODE:
		1042	RETVAL = next_pri;
		1043	if (items > 0)
		1044	{
		1045	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1046	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1047	next_pri = pri;
		1048	}
		1049	OUTPUT:
		1050	RETVAL
		1051
		1052	void
		1053	aioreq_nice (int nice = 0)
		1054	CODE:
		1055	nice = next_pri - nice;
		1056	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1057	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1058	next_pri = nice;
		1059
		1060	void
854	flush()	1061	flush ()
855	PROTOTYPE:	1062	PROTOTYPE:
856	CODE:	1063	CODE:
857	while (nreqs)	1064	while (eio_nreqs ())
858	{	1065	{
859	poll_wait ();	1066	poll_wait ();
860	poll_cb ();	1067	poll_cb ();
861	}	1068	}
862		1069
863	void	1070	int
864	poll()	1071	poll()
865	PROTOTYPE:	1072	PROTOTYPE:
866	CODE:	1073	CODE:
867	if (nreqs)
868	{
869	poll_wait ();	1074	poll_wait ();
870	poll_cb ();	1075	RETVAL = poll_cb ();
871	}	1076	OUTPUT:
		1077	RETVAL
872		1078
873	int	1079	int
874	poll_fileno()	1080	poll_fileno()
875	PROTOTYPE:	1081	PROTOTYPE:
876	CODE:	1082	CODE:
877	RETVAL = respipe [0];	1083	RETVAL = s_epipe_fd (&respipe);
878	OUTPUT:	1084	OUTPUT:
879	RETVAL	1085	RETVAL
880		1086
881	int	1087	int
882	poll_cb(...)	1088	poll_cb(...)
…		…
888		1094
889	void	1095	void
890	poll_wait()	1096	poll_wait()
891	PROTOTYPE:	1097	PROTOTYPE:
892	CODE:	1098	CODE:
893	if (nreqs)
894	poll_wait ();	1099	poll_wait ();
895		1100
896	int	1101	int
897	nreqs()	1102	nreqs()
898	PROTOTYPE:	1103	PROTOTYPE:
899	CODE:	1104	CODE:
900	RETVAL = nreqs;	1105	RETVAL = eio_nreqs ();
901	OUTPUT:	1106	OUTPUT:
902	RETVAL	1107	RETVAL
903		1108
		1109	int
		1110	nready()
		1111	PROTOTYPE:
		1112	CODE:
		1113	RETVAL = eio_nready ();
		1114	OUTPUT:
		1115	RETVAL
		1116
		1117	int
		1118	npending()
		1119	PROTOTYPE:
		1120	CODE:
		1121	RETVAL = eio_npending ();
		1122	OUTPUT:
		1123	RETVAL
		1124
		1125	int
		1126	nthreads()
		1127	PROTOTYPE:
		1128	CODE:
		1129	RETVAL = eio_nthreads ();
		1130	OUTPUT:
		1131	RETVAL
		1132
		1133	int
		1134	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1135	PROTOTYPE: $$$$
		1136	CODE:
		1137	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1138	RETVAL = posix_fadvise (fh, offset, length, advice);
		1139	#else
		1140	RETVAL = errno = ENOSYS;
		1141	#endif
		1142	OUTPUT:
		1143	RETVAL
		1144
		1145	ssize_t
		1146	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1147	PROTOTYPE: $$$$
		1148	CODE:
		1149	eio_sendfile_sync (ofh, ifh, offset, count);
		1150
		1151	void _on_next_submit (SV *cb)
		1152	CODE:
		1153	SvREFCNT_dec (on_next_submit);
		1154	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1155
		1156	PROTOTYPES: DISABLE
		1157
		1158	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1159
		1160	void
		1161	cancel (aio_req_ornot req)
		1162	CODE:
		1163	eio_cancel (req);
		1164
		1165	void
		1166	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1167	PPCODE:
		1168	{
		1169	if (GIMME_V != G_VOID)
		1170	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1171
		1172	if (items > 1)
		1173	{
		1174	SV *cb_cv =get_cb (callback);
		1175
		1176	SvREFCNT_dec (req->callback);
		1177	req->callback = SvREFCNT_inc (cb_cv);
		1178	}
		1179	}
		1180
		1181	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1182
		1183	void
		1184	add (aio_req grp, ...)
		1185	PPCODE:
		1186	{
		1187	int i;
		1188
		1189	if (grp->int1 == 2)
		1190	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1191
		1192	for (i = 1; i < items; ++i )
		1193	{
		1194	aio_req req;
		1195
		1196	if (GIMME_V != G_VOID)
		1197	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1198
		1199	req = SvAIO_REQ (ST (i));
		1200
		1201	if (req)
		1202	eio_grp_add (grp, req);
		1203	}
		1204	}
		1205
		1206	void
		1207	cancel_subs (aio_req_ornot req)
		1208	CODE:
		1209	req_cancel_subs (req);
		1210
		1211	void
		1212	result (aio_req grp, ...)
		1213	CODE:
		1214	{
		1215	int i;
		1216	AV *av;
		1217
		1218	grp->errorno = errno;
		1219
		1220	av = newAV ();
		1221	av_extend (av, items - 1);
		1222
		1223	for (i = 1; i < items; ++i )
		1224	av_push (av, newSVsv (ST (i)));
		1225
		1226	SvREFCNT_dec (grp->sv1);
		1227	grp->sv1 = (SV *)av;
		1228	}
		1229
		1230	void
		1231	errno (aio_req grp, int errorno = errno)
		1232	CODE:
		1233	grp->errorno = errorno;
		1234
		1235	void
		1236	limit (aio_req grp, int limit)
		1237	CODE:
		1238	eio_grp_limit (grp, limit);
		1239
		1240	void
		1241	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1242	CODE:
		1243	{
		1244	SvREFCNT_dec (grp->sv2);
		1245	grp->sv2 = newSVsv (callback);
		1246	grp->feed = aio_grp_feed;
		1247
		1248	if (grp->int2 <= 0)
		1249	grp->int2 = 2;
		1250
		1251	eio_grp_limit (grp, grp->int2);
		1252	}
		1253

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