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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC vs.
Revision 1.129 by root, Tue Sep 30 17:03:53 2008 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"
17
18	#include <pthread.h>
19
20	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
21	#include <errno.h>	11	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	12	#include <sys/types.h>
25	#include <sys/stat.h>	13	#include <sys/stat.h>
26	#include <limits.h>	14	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	15	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	16	#include <sched.h>
31		17
32	#if HAVE_SENDFILE	18	/* perl namespace pollution */
33	# if __linux	19	#undef VERSION
34	# include <sys/sendfile.h>	20
35	# elif __freebsd	21	#ifdef _WIN32
36	# include <sys/socket.h>	22
37	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
38	# elif __hpux	24	# undef malloc
39	# include <sys/socket.h>	25	# undef free
40	# elif __solaris /* not yet */	26
41	# 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
42	# else	59	#else
43	# error sendfile support requested but not available	60
44	# 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
45	#endif	68	#endif
46		69
47	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
48	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
49	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
50	#endif	83	#endif
51		84
52	#if __ia64	85	/*****************************************************************************/
53	# define STACKSIZE 65536	86
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	87	#if __GNUC__ >= 3
55	# define STACKSIZE PTHREAD_STACK_MIN	88	# define expect(expr,value) __builtin_expect ((expr),(value))
56	#else	89	#else
57	# define STACKSIZE 16384	90	# define expect(expr,value) (expr)
58	#endif	91	#endif
59		92
60	/* buffer size for various temporary buffers */	93	#define expect_false(expr) expect ((expr) != 0, 0)
61	#define AIO_BUFSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
62		95
63	#define dBUF \	96	/*****************************************************************************/
64	char *aio_buf = malloc (AIO_BUFSIZE); \
65	if (!aio_buf) \
66	return -1;
67		97
68	#define fBUF free (aio_buf)	98	static HV *stash;
69		99	typedef SV SV8; /* byte-sv, used for argument-checking */
70	enum {
71	REQ_QUIT,
72	REQ_OPEN, REQ_CLOSE,
73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
74	REQ_SENDFILE,
75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
76	REQ_FSYNC, REQ_FDATASYNC,
77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
78	REQ_READDIR,
79	REQ_LINK, REQ_SYMLINK,
80	REQ_GROUP, REQ_NOP,
81	REQ_BUSY,
82	};
83		100
84	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
85	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
86		103
87	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
88	{
89	struct aio_cb *volatile next;
90
91	SV *data, *callback;	105	SV *callback; \
92	SV *fh, *fh2;	106	SV *sv1, *sv2; \
93	void *dataptr, *data2ptr;
94	Stat_t *statdata;
95	off_t offset;
96	size_t length;
97	ssize_t result;
98
99	STRLEN dataoffset;	107	STRLEN stroffset; \
100	int type;	108	SV *self;
101	int fd, fd2;
102	int errorno;
103	mode_t mode; /* open */
104		109
105	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
106	unsigned char pri;
107		111
108	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
109	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
110	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
111		120
112	enum {	121	enum {
113	FLAG_CANCELLED = 0x01,	122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
114	};	123	};
115		124
		125	#include "libeio/eio.c"
		126
116	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
117	typedef aio_cb *aio_req_ornot;	128	typedef eio_req *aio_req_ornot;
118		129
119	enum {	130	static SV *on_next_submit;
120	PRI_MIN = -4,	131	static int next_pri = EIO_PRI_DEFAULT;
121	PRI_MAX = 4,
122
123	DEFAULT_PRI = 0,
124	PRI_BIAS = -PRI_MIN,
125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
126	};
127
128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
129
130	static int started, wanted;
131	static volatile int nreqs;
132	static int max_outstanding = 1<<30;	132	static int max_outstanding;
133	static int respipe [2];
134		133
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140		135
141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	136	static void req_destroy (aio_req req);
142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
144
145	/*
146	* a somewhat faster data structure might be nice, but
147	* with 8 priorities this actually needs <20 insns
148	* per shift, the most expensive operation.
149	*/
150	typedef struct {
151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
152	int size;
153	} reqq;
154
155	static reqq req_queue;
156	static reqq res_queue;
157
158	int reqq_push (reqq *q, aio_req req)
159	{
160	int pri = req->pri;
161	req->next = 0;
162
163	if (q->qe[pri])
164	{
165	q->qe[pri]->next = req;
166	q->qe[pri] = req;
167	}
168	else
169	q->qe[pri] = q->qs[pri] = req;
170
171	return q->size++;
172	}
173
174	aio_req reqq_shift (reqq *q)
175	{
176	int pri;
177
178	if (!q->size)
179	return 0;
180
181	--q->size;
182
183	for (pri = NUM_PRI; pri--; )
184	{
185	aio_req req = q->qs[pri];
186
187	if (req)
188	{
189	if (!(q->qs[pri] = req->next))
190	q->qe[pri] = 0;
191
192	return req;
193	}
194	}
195
196	abort ();
197	}
198
199	static void req_invoke (aio_req req);	137	static void req_cancel (aio_req req);
200	static void req_free (aio_req req);	138
		139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
201		152
202	/* must be called at most once */	153	/* must be called at most once */
203	static SV *req_sv (aio_req req, const char *klass)	154	static SV *req_sv (aio_req req, const char *klass)
204	{	155	{
205	if (!req->self)	156	if (!req->self)
…		…
223	return mg ? (aio_req)mg->mg_ptr : 0;	174	return mg ? (aio_req)mg->mg_ptr : 0;
224	}	175	}
225		176
226	static void aio_grp_feed (aio_req grp)	177	static void aio_grp_feed (aio_req grp)
227	{	178	{
228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	179	if (grp->sv2 && SvOK (grp->sv2))
229	{	180	{
230	int old_len = grp->length;
231
232	if (grp->fh2 && SvOK (grp->fh2))
233	{
234	dSP;	181	dSP;
235		182
236	ENTER;	183	ENTER;
237	SAVETMPS;	184	SAVETMPS;
238	PUSHMARK (SP);	185	PUSHMARK (SP);
239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
240	PUTBACK;	187	PUTBACK;
241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
242	SPAGAIN;	189	SPAGAIN;
243	FREETMPS;	190	FREETMPS;
244	LEAVE;	191	LEAVE;
245	}
246
247	/* stop if no progress has been made */
248	if (old_len == grp->length)
249	{
250	SvREFCNT_dec (grp->fh2);
251	grp->fh2 = 0;
252	break;
253	}
254	}	192	}
255	}	193	}
256		194
257	static void aio_grp_dec (aio_req grp)	195	static void req_submit (eio_req *req)
258	{	196	{
259	--grp->length;	197	eio_submit (req);
260		198
261	/* call feeder, if applicable */	199	if (expect_false (on_next_submit))
262	aio_grp_feed (grp);
263
264	/* finish, if done */
265	if (!grp->length && grp->fd)
266	{	200	{
267	req_invoke (grp);	201	dSP;
268	req_free (grp);	202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
269	}	209	}
270	}	210	}
271		211
272	static void poll_wait ()	212	static int req_invoke (eio_req *req)
273	{	213	{
274	fd_set rfd;	214	dSP;
275		215
276	while (nreqs)	216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
		218
		219	if (!EIO_CANCELLED (req) && req->callback)
277	{	220	{
278	int size;
279	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
280	pthread_mutex_lock (&reslock);
281	#endif
282	size = res_queue.size;
283	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
284	pthread_mutex_unlock (&reslock);
285	#endif
286
287	if (size)
288	return;
289
290	FD_ZERO(&rfd);
291	FD_SET(respipe [0], &rfd);
292
293	select (respipe [0] + 1, &rfd, 0, 0, 0);
294	}
295	}
296
297	static void req_invoke (aio_req req)
298	{
299	dSP;
300
301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
302	{
303	errno = req->errorno;
304
305	ENTER;	221	ENTER;
306	SAVETMPS;	222	SAVETMPS;
307	PUSHMARK (SP);	223	PUSHMARK (SP);
308	EXTEND (SP, 1);	224	EXTEND (SP, 1);
309		225
310	switch (req->type)	226	switch (req->type)
311	{	227	{
312	case REQ_READDIR:	228	case EIO_READDIR:
313	{	229	{
314	SV *rv = &PL_sv_undef;	230	SV *rv = &PL_sv_undef;
315		231
316	if (req->result >= 0)	232	if (req->result >= 0)
317	{	233	{
		234	int i;
318	char *buf = req->data2ptr;	235	char *buf = req->ptr2;
319	AV *av = newAV ();	236	AV *av = newAV ();
320		237
321	while (req->result)	238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
322	{	241	{
323	SV *sv = newSVpv (buf, 0);	242	SV *sv = newSVpv (buf, 0);
324		243
325	av_push (av, sv);	244	av_store (av, i, sv);
326	buf += SvCUR (sv) + 1;	245	buf += SvCUR (sv) + 1;
327	req->result--;
328	}	246	}
329		247
330	rv = sv_2mortal (newRV_noinc ((SV *)av));	248	rv = sv_2mortal (newRV_noinc ((SV *)av));
331	}	249	}
332		250
333	PUSHs (rv);	251	PUSHs (rv);
334	}	252	}
335	break;	253	break;
336		254
337	case REQ_OPEN:	255	case EIO_OPEN:
338	{	256	{
339	/* convert fd to fh */	257	/* convert fd to fh */
340	SV *fh;	258	SV *fh = &PL_sv_undef;
341		259
342	PUSHs (sv_2mortal (newSViv (req->result)));	260	if (req->result >= 0)
343	PUTBACK;	261	{
344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	262	GV *gv = (GV *)sv_newmortal ();
345	SPAGAIN;	263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
346		269
347	fh = SvREFCNT_inc (POPs);	270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
348		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
349	PUSHMARK (SP);	282	PUSHs (fh);
350	XPUSHs (sv_2mortal (fh));
351	}	283	}
352	break;	284	break;
353		285
354	case REQ_GROUP:	286	case EIO_GROUP:
355	req->fd = 2; /* mark group as finished */	287	req->int1 = 2; /* mark group as finished */
356		288
357	if (req->data)	289	if (req->sv1)
358	{	290	{
359	int i;	291	int i;
360	AV *av = (AV *)req->data;	292	AV *av = (AV *)req->sv1;
361		293
362	EXTEND (SP, AvFILL (av) + 1);	294	EXTEND (SP, AvFILL (av) + 1);
363	for (i = 0; i <= AvFILL (av); ++i)	295	for (i = 0; i <= AvFILL (av); ++i)
364	PUSHs (*av_fetch (av, i, 0));	296	PUSHs (*av_fetch (av, i, 0));
365	}	297	}
366	break;	298	break;
367		299
368	case REQ_NOP:	300	case EIO_NOP:
369	case REQ_BUSY:	301	case EIO_BUSY:
370	break;	302	break;
		303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
371		328
372	default:	329	default:
373	PUSHs (sv_2mortal (newSViv (req->result)));	330	PUSHs (sv_2mortal (newSViv (req->result)));
374	break;	331	break;
375	}	332	}
376		333
		334	errno = req->errorno;
377		335
378	PUTBACK;	336	PUTBACK;
379	call_sv (req->callback, G_VOID | G_EVAL);	337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
380	SPAGAIN;	338	SPAGAIN;
381		339
382	FREETMPS;	340	FREETMPS;
383	LEAVE;	341	LEAVE;
		342
		343	PUTBACK;
384	}	344	}
385		345
386	if (req->grp)	346	return !!SvTRUE (ERRSV);
387	{
388	aio_req grp = req->grp;
389
390	/* unlink request */
391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
393
394	if (grp->grp_first == req)
395	grp->grp_first = req->grp_next;
396
397	aio_grp_dec (grp);
398	}
399
400	if (SvTRUE (ERRSV))
401	{
402	req_free (req);
403	croak (0);
404	}
405	}	347	}
406		348
407	static void req_free (aio_req req)	349	static void req_destroy (aio_req req)
408	{	350	{
409	if (req->self)	351	if (req->self)
410	{	352	{
411	sv_unmagic (req->self, PERL_MAGIC_ext);	353	sv_unmagic (req->self, PERL_MAGIC_ext);
412	SvREFCNT_dec (req->self);	354	SvREFCNT_dec (req->self);
413	}	355	}
414		356
415	SvREFCNT_dec (req->data);
416	SvREFCNT_dec (req->fh);	357	SvREFCNT_dec (req->sv1);
417	SvREFCNT_dec (req->fh2);	358	SvREFCNT_dec (req->sv2);
418	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
419	Safefree (req->statdata);
420
421	if (req->type == REQ_READDIR && req->result >= 0)
422	free (req->data2ptr);
423		360
424	Safefree (req);	361	Safefree (req);
425	}	362	}
426		363
427	static void req_cancel (aio_req req)	364	static void req_cancel_subs (aio_req grp)
428	{	365	{
429	req->flags |= FLAG_CANCELLED;	366	aio_req sub;
430		367
431	if (req->type == REQ_GROUP)	368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
		382
		383	static void
		384	create_respipe (void)
		385	{
		386	int old_readfd = respipe [0];
		387
		388	if (respipe [1] >= 0)
		389	respipe_close (TO_SOCKET (respipe [1]));
		390
		391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
432	{	399	{
433	aio_req sub;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		401	croak ("unable to initialize result pipe(2)");
434		402
435	for (sub = req->grp_first; sub; sub = sub->grp_next)	403	respipe_close (respipe [0]);
436	req_cancel (sub);	404	respipe [0] = old_readfd;
437	}	405	}
438	}
439		406
		407	#ifdef _WIN32
		408	int arg = 1;
		409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
		416
		417	respipe_osf [0] = TO_SOCKET (respipe [0]);
		418	respipe_osf [1] = TO_SOCKET (respipe [1]);
		419	}
		420
		421	static void poll_wait (void)
		422	{
		423	fd_set rfd;
		424
		425	while (eio_nreqs ())
		426	{
		427	int size;
		428
		429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		442	}
		443	}
		444
440	static int poll_cb ()	445	static int poll_cb (void)
441	{	446	{
442	dSP;
443	int count = 0;
444	int do_croak = 0;
445	aio_req req;
446
447	for (;;)	447	for (;;)
448	{	448	{
449	pthread_mutex_lock (&reslock);	449	int res = eio_poll ();
450	req = reqq_shift (&res_queue);
451		450
452	if (req)	451	if (res > 0)
453	{
454	if (!res_queue.size)
455	{
456	/* read any signals sent by the worker threads */
457	char buf [32];
458	while (read (respipe [0], buf, 32) == 32)
459	;
460	}
461	}
462
463	pthread_mutex_unlock (&reslock);
464
465	if (!req)
466	break;	452	croak (0);
467		453
468	--nreqs;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
469		456
470	if (req->type == REQ_QUIT)	457	poll_wait ();
471	started--;
472	else if (req->type == REQ_GROUP && req->length)
473	{
474	req->fd = 1; /* mark request as delayed */
475	continue;
476	}
477	else
478	{
479	if (req->type == REQ_READ)
480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
481
482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
483	SvREADONLY_off (req->data);
484
485	if (req->statdata)
486	{
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;
489	PL_statcache = *(req->statdata);
490	}
491
492	req_invoke (req);
493
494	count++;
495	}
496
497	req_free (req);
498	}	458	}
499
500	return count;
501	}	459	}
502		460
503	static void *aio_proc(void *arg);
504
505	static void start_thread (void)	461	static void atfork_child (void)
506	{	462	{
507	sigset_t fullsigset, oldsigset;	463	create_respipe ();
508	pthread_t tid;
509	pthread_attr_t attr;
510
511	pthread_attr_init (&attr);
512	pthread_attr_setstacksize (&attr, STACKSIZE);
513	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
514
515	sigfillset (&fullsigset);
516	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
517
518	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
519	started++;
520
521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
522	}	464	}
523		465
524	static void req_send (aio_req req)	466	static SV *
		467	get_cb (SV *cb_sv)
525	{	468	{
526	while (started < wanted && nreqs >= started)	469	HV *st;
527	start_thread ();	470	GV *gvp;
		471	CV *cv;
528		472
529	++nreqs;	473	if (!SvOK (cb_sv))
530
531	pthread_mutex_lock (&reqlock);
532	reqq_push (&req_queue, req);
533	pthread_cond_signal (&reqwait);
534	pthread_mutex_unlock (&reqlock);
535
536	if (nreqs > max_outstanding)
537	for (;;)
538	{
539	poll_cb ();
540
541	if (nreqs <= max_outstanding)
542	break;
543
544	poll_wait ();
545	}
546	}
547
548	static void end_thread (void)
549	{
550	aio_req req;
551
552	Newz (0, req, 1, aio_cb);
553
554	req->type = REQ_QUIT;
555	req->pri = PRI_MAX + PRI_BIAS;
556
557	req_send (req);
558	}
559
560	static void min_parallel (int nthreads)
561	{
562	if (wanted < nthreads)
563	wanted = nthreads;
564	}
565
566	static void max_parallel (int nthreads)
567	{
568	int cur = started;
569
570	if (wanted > nthreads)
571	wanted = nthreads;
572
573	while (cur > wanted)
574	{
575	end_thread ();
576	cur--;
577	}
578
579	while (started > wanted)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584	}
585
586	static void create_pipe ()
587	{
588	if (pipe (respipe))
589	croak ("unable to initialize result pipe");
590
591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593
594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
595	croak ("cannot set result pipe to nonblocking mode");
596	}
597
598	/*****************************************************************************/
599	/* work around various missing functions */
600
601	#if !HAVE_PREADWRITE
602	# define pread aio_pread
603	# define pwrite aio_pwrite
604
605	/*
606	* make our pread/pwrite safe against themselves, but not against
607	* normal read/write by using a mutex. slows down execution a lot,
608	* but that's your problem, not mine.
609	*/
610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
611
612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
613	{
614	ssize_t res;
615	off_t ooffset;
616
617	pthread_mutex_lock (&preadwritelock);
618	ooffset = lseek (fd, 0, SEEK_CUR);
619	lseek (fd, offset, SEEK_SET);
620	res = read (fd, buf, count);
621	lseek (fd, ooffset, SEEK_SET);
622	pthread_mutex_unlock (&preadwritelock);
623
624	return res;
625	}
626
627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
628	{
629	ssize_t res;
630	off_t ooffset;
631
632	pthread_mutex_lock (&preadwritelock);
633	ooffset = lseek (fd, 0, SEEK_CUR);
634	lseek (fd, offset, SEEK_SET);
635	res = write (fd, buf, count);
636	lseek (fd, offset, SEEK_SET);
637	pthread_mutex_unlock (&preadwritelock);
638
639	return res;
640	}
641	#endif
642
643	#if !HAVE_FDATASYNC
644	# define fdatasync fsync
645	#endif
646
647	#if !HAVE_READAHEAD
648	# define readahead aio_readahead
649
650	static ssize_t readahead (int fd, off_t offset, size_t count)
651	{
652	dBUF;
653
654	while (count > 0)
655	{
656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
657
658	pread (fd, aio_buf, len, offset);
659	offset += len;
660	count -= len;
661	}
662
663	fBUF;
664
665	errno = 0;
666	}
667	#endif
668
669	#if !HAVE_READDIR_R
670	# define readdir_r aio_readdir_r
671
672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
673
674	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
675	{
676	struct dirent *e;
677	int errorno;
678
679	pthread_mutex_lock (&readdirlock);
680
681	e = readdir (dirp);
682	errorno = errno;
683
684	if (e)
685	{
686	*res = ent;
687	strcpy (ent->d_name, e->d_name);
688	}
689	else
690	*res = 0;
691
692	pthread_mutex_unlock (&readdirlock);
693
694	errno = errorno;
695	return e ? 0 : -1;
696	}
697	#endif
698
699	/* sendfile always needs emulation */
700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
701	{
702	ssize_t res;
703
704	if (!count)
705	return 0;	474	return 0;
706		475
707	#if HAVE_SENDFILE	476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
708	# if __linux
709	res = sendfile (ofd, ifd, &offset, count);
710		477
711	# elif __freebsd	478	if (!cv)
712	/*	479	croak ("IO::AIO callback must be undef or a CODE reference");
713	* Of course, the freebsd sendfile is a dire hack with no thoughts
714	* wasted on making it similar to other I/O functions.
715	*/
716	{
717	off_t sbytes;
718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
719		480
720	if (res < 0 && sbytes)	481	return (SV *)cv;
721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
722	res = sbytes;
723	}
724
725	# elif __hpux
726	res = sendfile (ofd, ifd, offset, count, 0, 0);
727
728	# elif __solaris
729	{
730	struct sendfilevec vec;
731	size_t sbytes;
732
733	vec.sfv_fd = ifd;
734	vec.sfv_flag = 0;
735	vec.sfv_off = offset;
736	vec.sfv_len = count;
737
738	res = sendfilev (ofd, &vec, 1, &sbytes);
739
740	if (res < 0 && sbytes)
741	res = sbytes;
742	}
743
744	# endif
745	#else
746	res = -1;
747	errno = ENOSYS;
748	#endif
749
750	if (res < 0
751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
752	#if __solaris
753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
754	#endif
755	)
756	)
757	{
758	/* emulate sendfile. this is a major pain in the ass */
759	dBUF;
760
761	res = 0;
762
763	while (count)
764	{
765	ssize_t cnt;
766
767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
768
769	if (cnt <= 0)
770	{
771	if (cnt && !res) res = -1;
772	break;
773	}
774
775	cnt = write (ofd, aio_buf, cnt);
776
777	if (cnt <= 0)
778	{
779	if (cnt && !res) res = -1;
780	break;
781	}
782
783	offset += cnt;
784	res += cnt;
785	count -= cnt;
786	}
787
788	fBUF;
789	}
790
791	return res;
792	}
793
794	/* read a full directory */
795	static int scandir_ (const char *path, void **namesp)
796	{
797	DIR *dirp;
798	union
799	{
800	struct dirent d;
801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
802	} *u;
803	struct dirent *entp;
804	char *name, *names;
805	int memlen = 4096;
806	int memofs = 0;
807	int res = 0;
808	int errorno;
809
810	dirp = opendir (path);
811	if (!dirp)
812	return -1;
813
814	u = malloc (sizeof (*u));
815	names = malloc (memlen);
816
817	if (u && names)
818	for (;;)
819	{
820	errno = 0;
821	readdir_r (dirp, &u->d, &entp);
822
823	if (!entp)
824	break;
825
826	name = entp->d_name;
827
828	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
829	{
830	int len = strlen (name) + 1;
831
832	res++;
833
834	while (memofs + len > memlen)
835	{
836	memlen *= 2;
837	names = realloc (names, memlen);
838	if (!names)
839	break;
840	}
841
842	memcpy (names + memofs, name, len);
843	memofs += len;
844	}
845	}
846
847	errorno = errno;
848	free (u);
849	closedir (dirp);
850
851	if (errorno)
852	{
853	free (names);
854	errno = errorno;
855	res = -1;
856	}
857
858	*namesp = (void *)names;
859	return res;
860	}
861
862	/*****************************************************************************/
863
864	static void *aio_proc (void *thr_arg)
865	{
866	aio_req req;
867	int type;
868
869	do
870	{
871	pthread_mutex_lock (&reqlock);
872
873	for (;;)
874	{
875	req = reqq_shift (&req_queue);
876
877	if (req)
878	break;
879
880	pthread_cond_wait (&reqwait, &reqlock);
881	}
882
883	pthread_mutex_unlock (&reqlock);
884
885	errno = 0; /* strictly unnecessary */
886	type = req->type; /* remember type for QUIT check */
887
888	if (!(req->flags & FLAG_CANCELLED))
889	switch (type)
890	{
891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
893
894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
896
897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
900
901	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
902	case REQ_CLOSE: req->result = close (req->fd); break;
903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
904	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
905	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
906	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
908
909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
910	case REQ_FSYNC: req->result = fsync (req->fd); break;
911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
912
913	case REQ_BUSY:
914	{
915	struct timeval tv;
916
917	tv.tv_sec = req->fd;
918	tv.tv_usec = req->fd2;
919
920	req->result = select (0, 0, 0, 0, &tv);
921	}
922
923	case REQ_GROUP:
924	case REQ_NOP:
925	case REQ_QUIT:
926	break;
927
928	default:
929	req->result = ENOSYS;
930	break;
931	}
932
933	req->errorno = errno;
934
935	pthread_mutex_lock (&reslock);
936
937	if (!reqq_push (&res_queue, req))
938	/* write a dummy byte to the pipe so fh becomes ready */
939	write (respipe [1], &respipe, 1);
940
941	pthread_mutex_unlock (&reslock);
942	}
943	while (type != REQ_QUIT);
944
945	return 0;
946	}
947
948	/*****************************************************************************/
949
950	static void atfork_prepare (void)
951	{
952	pthread_mutex_lock (&reqlock);
953	pthread_mutex_lock (&reslock);
954	#if !HAVE_PREADWRITE
955	pthread_mutex_lock (&preadwritelock);
956	#endif
957	#if !HAVE_READDIR_R
958	pthread_mutex_lock (&readdirlock);
959	#endif
960	}
961
962	static void atfork_parent (void)
963	{
964	#if !HAVE_READDIR_R
965	pthread_mutex_unlock (&readdirlock);
966	#endif
967	#if !HAVE_PREADWRITE
968	pthread_mutex_unlock (&preadwritelock);
969	#endif
970	pthread_mutex_unlock (&reslock);
971	pthread_mutex_unlock (&reqlock);
972	}
973
974	static void atfork_child (void)
975	{
976	aio_req prv;
977
978	started = 0;
979
980	while (prv = reqq_shift (&req_queue))
981	req_free (prv);
982
983	while (prv = reqq_shift (&res_queue))
984	req_free (prv);
985
986	close (respipe [0]);
987	close (respipe [1]);
988	create_pipe ();
989
990	atfork_parent ();
991	}	482	}
992		483
993	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
994	aio_req req; \	486	aio_req req; \
995	int req_pri = next_pri; \	487	int req_pri = next_pri; \
996	next_pri = DEFAULT_PRI + PRI_BIAS; \	488	next_pri = EIO_PRI_DEFAULT; \
997	\	489	\
998	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
999	croak ("callback must be undef or of reference type"); \
1000	\	491	\
1001	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
1002	if (!req) \	493	if (!req) \
1003	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
1004	\	495	\
1005	req->callback = newSVsv (callback); \	496	req->callback = SvREFCNT_inc (cb_cv); \
1006	req->pri = req_pri	497	req->pri = req_pri
1007		498
1008	#define REQ_SEND \	499	#define REQ_SEND \
		500	PUTBACK; \
1009	req_send (req); \	501	req_submit (req); \
		502	SPAGAIN; \
1010	\	503	\
1011	if (GIMME_V != G_VOID) \	504	if (GIMME_V != G_VOID) \
1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));	505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1013		506
1014	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
1015		508
1016	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
1017		510
1018	BOOT:	511	BOOT:
1019	{	512	{
1020	HV *stash = gv_stashpv ("IO::AIO", 1);	513	stash = gv_stashpv ("IO::AIO", 1);
		514
1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	#endif
1024		523
1025	create_pipe ();	524	create_respipe ();
1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1027	}
1028		525
		526	if (eio_init (want_poll, done_poll) < 0)
		527	croak ("IO::AIO: unable to initialise eio library");
		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
		531	}
		532
1029	void	533	void
1030	min_parallel (nthreads)	534	max_poll_reqs (int nreqs)
1031	int nthreads
1032	PROTOTYPE: $	535	PROTOTYPE: $
		536	CODE:
		537	eio_set_max_poll_reqs (nreqs);
1033		538
1034	void	539	void
1035	max_parallel (nthreads)	540	max_poll_time (double nseconds)
1036	int nthreads
1037	PROTOTYPE: $	541	PROTOTYPE: $
1038
1039	int
1040	max_outstanding (nreqs)
1041	int nreqs
1042	PROTOTYPE: $
1043	CODE:	542	CODE:
1044	RETVAL = max_outstanding;	543	eio_set_max_poll_time (nseconds);
		544
		545	void
		546	min_parallel (int nthreads)
		547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
		550
		551	void
		552	max_parallel (int nthreads)
		553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
		556
		557	void
		558	max_idle (int nthreads)
		559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_idle (nthreads);
		562
		563	void
		564	max_outstanding (int maxreqs)
		565	PROTOTYPE: $
		566	CODE:
1045	max_outstanding = nreqs;	567	max_outstanding = maxreqs;
1046		568
1047	void	569	void
1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1049	SV * pathname
1050	int flags
1051	int mode
1052	SV * callback
1053	PROTOTYPE: $$$;$	571	PROTOTYPE: $$$;$
1054	PPCODE:	572	PPCODE:
1055	{	573	{
1056	dREQ;	574	dREQ;
1057		575
1058	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
1059	req->data = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
1060	req->dataptr = SvPVbyte_nolen (req->data);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
1061	req->fd = flags;	579	req->int1 = flags;
1062	req->mode = mode;	580	req->int2 = mode;
1063		581
1064	REQ_SEND;	582	REQ_SEND;
1065	}	583	}
1066		584
1067	void	585	void
1068	aio_close (fh,callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1069	SV * fh
1070	SV * callback
1071	PROTOTYPE: $;$	587	PROTOTYPE: $;$
1072	ALIAS:	588	ALIAS:
1073	aio_close = REQ_CLOSE
1074	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
1075	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
1076	PPCODE:	591	PPCODE:
1077	{	592	{
1078	dREQ;	593	dREQ;
1079		594
1080	req->type = ix;	595	req->type = ix;
1081	req->fh = newSVsv (fh);	596	req->sv1 = newSVsv (fh);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1083		598
1084	REQ_SEND (req);	599	REQ_SEND (req);
1085	}	600	}
1086		601
1087	void	602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1089	SV * fh
1090	UV offset
1091	UV length
1092	SV * data
1093	UV dataoffset
1094	SV * callback
1095	ALIAS:	632	ALIAS:
1096	aio_read = REQ_READ	633	aio_read = EIO_READ
1097	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
1099	PPCODE:	636	PPCODE:
1100	{	637	{
1101	aio_req req;
1102	STRLEN svlen;	638	STRLEN svlen;
1103	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
1104		641
1105	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);	643	SvPOK_on (data);
1107		644
1108	if (dataoffset < 0)	645	if (dataoffset < 0)
1109	dataoffset += svlen;	646	dataoffset += svlen;
1110		647
1111	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
1113		650
1114	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
1115	{	652	{
1116	/* write: check length and adjust. */	653	/* write: check length and adjust. */
1117	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
1118	length = svlen - dataoffset;	655	len = svlen - dataoffset;
1119	}	656	}
1120	else	657	else
1121	{	658	{
1122	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
1123	svptr = SvGROW (data, length + dataoffset);	660	svptr = SvGROW (data, len + dataoffset + 1);
1124	}	661	}
1125		662
1126	if (length < 0)	663	if (len < 0)
1127	croak ("length must not be negative");	664	croak ("length must not be negative");
1128		665
1129	{	666	{
1130	dREQ;	667	dREQ;
1131		668
1132	req->type = ix;	669	req->type = ix;
1133	req->fh = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1135	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1136	req->offset = offset;	674	req->size = len;
1137	req->length = length;
1138	req->data = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc (data);
1139	req->dataptr = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
		677	req->stroffset = dataoffset;
1140		678
1141	if (!SvREADONLY (data))	679	if (!SvREADONLY (data))
1142	{	680	{
1143	SvREADONLY_on (data);	681	SvREADONLY_on (data);
1144	req->data2ptr = (void *)data;	682	req->flags |= FLAG_SV2_RO_OFF;
1145	}	683	}
1146		684
1147	REQ_SEND;	685	REQ_SEND;
1148	}	686	}
1149	}	687	}
1150		688
1151	void	689	void
		690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		691	PROTOTYPE: $$;$
		692	PPCODE:
		693	{
		694	SV *data;
		695	dREQ;
		696
		697	req->type = EIO_READLINK;
		698	req->sv1 = newSVsv (path);
		699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		700
		701	REQ_SEND;
		702	}
		703
		704	void
1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	705	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1153	SV * out_fh
1154	SV * in_fh
1155	UV in_offset
1156	UV length
1157	SV * callback
1158	PROTOTYPE: $$$$;$	706	PROTOTYPE: $$$$;$
1159	PPCODE:	707	PPCODE:
1160	{	708	{
1161	dREQ;	709	dREQ;
1162		710
1163	req->type = REQ_SENDFILE;	711	req->type = EIO_SENDFILE;
1164	req->fh = newSVsv (out_fh);	712	req->sv1 = newSVsv (out_fh);
1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1166	req->fh2 = newSVsv (in_fh);	714	req->sv2 = newSVsv (in_fh);
1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1168	req->offset = in_offset;	716	req->offs = SvVAL64 (in_offset);
1169	req->length = length;	717	req->size = length;
1170		718
1171	REQ_SEND;	719	REQ_SEND;
1172	}	720	}
1173		721
1174	void	722	void
1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	IV length
1179	SV * callback
1180	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
1181	PPCODE:	725	PPCODE:
1182	{	726	{
1183	dREQ;	727	dREQ;
1184		728
1185	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
1186	req->fh = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1188	req->offset = offset;	732	req->offs = SvVAL64 (offset);
1189	req->length = length;	733	req->size = length;
1190		734
1191	REQ_SEND;	735	REQ_SEND;
1192	}	736	}
1193		737
1194	void	738	void
1195	aio_stat (fh_or_path,callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1196	SV * fh_or_path
1197	SV * callback
1198	ALIAS:	740	ALIAS:
1199	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
1200	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
1201	PPCODE:	743	PPCODE:
1202	{	744	{
1203	dREQ;	745	dREQ;
1204		746
1205	New (0, req->statdata, 1, Stat_t);	747	req->sv1 = newSVsv (fh_or_path);
1206	if (!req->statdata)
1207	{
1208	req_free (req);
1209	croak ("out of memory during aio_req->statdata allocation");
1210	}
1211		748
1212	if (SvPOK (fh_or_path))	749	if (SvPOK (req->sv1))
1213	{	750	{
1214	req->type = ix;	751	req->type = ix;
1215	req->data = newSVsv (fh_or_path);
1216	req->dataptr = SvPVbyte_nolen (req->data);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
1217	}	753	}
1218	else	754	else
1219	{	755	{
1220	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
1221	req->fh = newSVsv (fh_or_path);
1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1223	}	758	}
1224		759
1225	REQ_SEND;	760	REQ_SEND;
1226	}	761	}
1227		762
1228	void	763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
		774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
		783
		784	REQ_SEND;
		785	}
		786
		787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
1229	aio_unlink (pathname,callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1230	SV * pathname
1231	SV * callback
1232	ALIAS:	862	ALIAS:
1233	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
1234	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
1235	aio_readdir = REQ_READDIR	865	aio_readdir = EIO_READDIR
1236	PPCODE:	866	PPCODE:
1237	{	867	{
1238	dREQ;	868	dREQ;
1239		869
1240	req->type = ix;	870	req->type = ix;
1241	req->data = newSVsv (pathname);	871	req->sv1 = newSVsv (pathname);
1242	req->dataptr = SvPVbyte_nolen (req->data);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		879	ALIAS:
		880	aio_link = EIO_LINK
		881	aio_symlink = EIO_SYMLINK
		882	aio_rename = EIO_RENAME
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->type = ix;
		888	req->sv1 = newSVsv (oldpath);
		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
		890	req->sv2 = newSVsv (newpath);
		891	req->ptr2 = SvPVbyte_nolen (req->sv2);
1243		892
1244	REQ_SEND;	893	REQ_SEND;
1245	}	894	}
1246		895
1247	void	896	void
1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)	897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1249	SV * oldpath
1250	SV * newpath
1251	SV * callback
1252	ALIAS:
1253	aio_link = REQ_LINK
1254	aio_symlink = REQ_SYMLINK
1255	aio_rename = REQ_RENAME
1256	PPCODE:	898	PPCODE:
1257	{	899	{
1258	dREQ;	900	dREQ;
1259		901
1260	req->type = ix;	902	req->type = EIO_MKNOD;
1261	req->fh = newSVsv (oldpath);	903	req->sv1 = newSVsv (pathname);
1262	req->data2ptr = SvPVbyte_nolen (req->fh);	904	req->ptr1 = SvPVbyte_nolen (req->sv1);
1263	req->data = newSVsv (newpath);	905	req->int2 = (mode_t)mode;
1264	req->dataptr = SvPVbyte_nolen (req->data);	906	req->offs = dev;
1265		907
1266	REQ_SEND;	908	REQ_SEND;
1267	}	909	}
1268		910
1269	void	911	void
1270	aio_busy (delay,callback=&PL_sv_undef)	912	aio_busy (double delay, SV *callback=&PL_sv_undef)
1271	double delay
1272	SV * callback
1273	PPCODE:	913	PPCODE:
1274	{	914	{
1275	dREQ;	915	dREQ;
1276		916
1277	req->type = REQ_BUSY;	917	req->type = EIO_BUSY;
1278	req->fd = delay < 0. ? 0 : delay;	918	req->nv1 = delay < 0. ? 0. : delay;
1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1280		919
1281	REQ_SEND;	920	REQ_SEND;
1282	}	921	}
1283		922
1284	void	923	void
1285	aio_group (callback=&PL_sv_undef)	924	aio_group (SV *callback=&PL_sv_undef)
1286	SV * callback
1287	PROTOTYPE: ;$	925	PROTOTYPE: ;$
1288	PPCODE:	926	PPCODE:
1289	{	927	{
1290	dREQ;	928	dREQ;
1291		929
1292	req->type = REQ_GROUP;	930	req->type = EIO_GROUP;
		931
1293	req_send (req);	932	req_submit (req);
1294
1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));	933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1296	}	934	}
1297		935
1298	void	936	void
1299	aio_nop (callback=&PL_sv_undef)	937	aio_nop (SV *callback=&PL_sv_undef)
1300	SV * callback	938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
1301	PPCODE:	941	PPCODE:
1302	{	942	{
1303	dREQ;	943	dREQ;
1304		944
1305	req->type = REQ_NOP;	945	req->type = ix;
1306		946
1307	REQ_SEND;	947	REQ_SEND;
1308	}	948	}
1309		949
1310	void	950	int
1311	aioreq_pri (int pri = DEFAULT_PRI)	951	aioreq_pri (int pri = 0)
1312	CODE:	952	PROTOTYPE: ;$
		953	CODE:
		954	RETVAL = next_pri;
		955	if (items > 0)
		956	{
1313	if (pri < PRI_MIN) pri = PRI_MIN;	957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1314	if (pri > PRI_MAX) pri = PRI_MAX;	958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1315	next_pri = pri + PRI_BIAS;	959	next_pri = pri;
		960	}
		961	OUTPUT:
		962	RETVAL
1316		963
1317	void	964	void
1318	aioreq_nice (int nice = 0)	965	aioreq_nice (int nice = 0)
1319	CODE:	966	CODE:
1320	nice = next_pri - nice;	967	nice = next_pri - nice;
1321	if (nice < PRI_MIN) nice = PRI_MIN;	968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1322	if (nice > PRI_MAX) nice = PRI_MAX;	969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1323	next_pri = nice + PRI_BIAS;	970	next_pri = nice;
1324		971
1325	void	972	void
1326	flush ()	973	flush ()
1327	PROTOTYPE:	974	PROTOTYPE:
1328	CODE:	975	CODE:
1329	while (nreqs)	976	while (eio_nreqs ())
1330	{	977	{
1331	poll_wait ();	978	poll_wait ();
1332	poll_cb ();	979	poll_cb ();
1333	}	980	}
1334		981
1335	void	982	int
1336	poll()	983	poll()
1337	PROTOTYPE:	984	PROTOTYPE:
1338	CODE:	985	CODE:
1339	if (nreqs)
1340	{
1341	poll_wait ();	986	poll_wait ();
1342	poll_cb ();	987	RETVAL = poll_cb ();
1343	}	988	OUTPUT:
		989	RETVAL
1344		990
1345	int	991	int
1346	poll_fileno()	992	poll_fileno()
1347	PROTOTYPE:	993	PROTOTYPE:
1348	CODE:	994	CODE:
…		…
1360		1006
1361	void	1007	void
1362	poll_wait()	1008	poll_wait()
1363	PROTOTYPE:	1009	PROTOTYPE:
1364	CODE:	1010	CODE:
1365	if (nreqs)
1366	poll_wait ();	1011	poll_wait ();
1367		1012
1368	int	1013	int
1369	nreqs()	1014	nreqs()
1370	PROTOTYPE:	1015	PROTOTYPE:
1371	CODE:	1016	CODE:
1372	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
1373	OUTPUT:	1018	OUTPUT:
1374	RETVAL	1019	RETVAL
1375		1020
		1021	int
		1022	nready()
		1023	PROTOTYPE:
		1024	CODE:
		1025	RETVAL = eio_nready ();
		1026	OUTPUT:
		1027	RETVAL
		1028
		1029	int
		1030	npending()
		1031	PROTOTYPE:
		1032	CODE:
		1033	RETVAL = eio_npending ();
		1034	OUTPUT:
		1035	RETVAL
		1036
		1037	int
		1038	nthreads()
		1039	PROTOTYPE:
		1040	CODE:
		1041	RETVAL = eio_nthreads ();
		1042	OUTPUT:
		1043	RETVAL
		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
1376	PROTOTYPES: DISABLE	1050	PROTOTYPES: DISABLE
1377		1051
1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1379		1053
1380	void	1054	void
1381	cancel (aio_req_ornot req)	1055	cancel (aio_req_ornot req)
1382	CODE:	1056	CODE:
1383	req_cancel (req);	1057	eio_cancel (req);
1384		1058
1385	void	1059	void
1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1387	CODE:	1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
1388	SvREFCNT_dec (req->callback);	1070	SvREFCNT_dec (req->callback);
1389	req->callback = newSVsv (callback);	1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
1390		1074
1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1392		1076
1393	void	1077	void
1394	add (aio_req grp, ...)	1078	add (aio_req grp, ...)
1395	PPCODE:	1079	PPCODE:
1396	{	1080	{
1397	int i;	1081	int i;
1398	aio_req req;
1399		1082
1400	if (grp->fd == 2)	1083	if (grp->int1 == 2)
1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1402		1085
1403	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1404	{	1087	{
		1088	aio_req req;
		1089
1405	if (GIMME_V != G_VOID)	1090	if (GIMME_V != G_VOID)
1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1407		1092
1408	req = SvAIO_REQ (ST (i));	1093	req = SvAIO_REQ (ST (i));
1409		1094
1410	if (req)	1095	if (req)
1411	{	1096	eio_grp_add (grp, req);
1412	++grp->length;
1413	req->grp = grp;
1414
1415	req->grp_prev = 0;
1416	req->grp_next = grp->grp_first;
1417
1418	if (grp->grp_first)
1419	grp->grp_first->grp_prev = req;
1420
1421	grp->grp_first = req;
1422	}	1097	}
1423	}
1424	}	1098	}
		1099
		1100	void
		1101	cancel_subs (aio_req_ornot req)
		1102	CODE:
		1103	req_cancel_subs (req);
1425		1104
1426	void	1105	void
1427	result (aio_req grp, ...)	1106	result (aio_req grp, ...)
1428	CODE:	1107	CODE:
1429	{	1108	{
1430	int i;	1109	int i;
		1110	AV *av;
		1111
		1112	grp->errorno = errno;
		1113
1431	AV *av = newAV ();	1114	av = newAV ();
1432		1115
1433	for (i = 1; i < items; ++i )	1116	for (i = 1; i < items; ++i )
1434	av_push (av, newSVsv (ST (i)));	1117	av_push (av, newSVsv (ST (i)));
1435		1118
1436	SvREFCNT_dec (grp->data);	1119	SvREFCNT_dec (grp->sv1);
1437	grp->data = (SV *)av;	1120	grp->sv1 = (SV *)av;
1438	}	1121	}
		1122
		1123	void
		1124	errno (aio_req grp, int errorno = errno)
		1125	CODE:
		1126	grp->errorno = errorno;
1439		1127
1440	void	1128	void
1441	limit (aio_req grp, int limit)	1129	limit (aio_req grp, int limit)
1442	CODE:	1130	CODE:
1443	grp->fd2 = limit;	1131	eio_grp_limit (grp, limit);
1444	aio_grp_feed (grp);
1445		1132
1446	void	1133	void
1447	feed (aio_req grp, SV *callback=&PL_sv_undef)	1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
1448	CODE:	1135	CODE:
1449	{	1136	{
1450	SvREFCNT_dec (grp->fh2);	1137	SvREFCNT_dec (grp->sv2);
1451	grp->fh2 = newSVsv (callback);	1138	grp->sv2 = newSVsv (callback);
1452		1139
1453	if (grp->fd2 <= 0)	1140	if (grp->int2 <= 0)
1454	grp->fd2 = 2;	1141	grp->int2 = 2;
1455		1142
1456	aio_grp_feed (grp);	1143	eio_grp_limit (grp, grp->int2);
1457	}	1144	}
1458		1145

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