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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.78 by root, Thu Oct 26 14:35:34 2006 UTC vs.
Revision 1.120 by root, Sun May 11 19:17:09 2008 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
22	#include <errno.h>	11	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	12	#include <sys/types.h>
26	#include <sys/stat.h>	13	#include <sys/stat.h>
27	#include <limits.h>	14	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	15	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	16	#include <sched.h>
32		17
33	#if HAVE_SENDFILE	18	/* perl namespace pollution */
34	# if __linux	19	#undef VERSION
35	# include <sys/sendfile.h>	20
36	# elif __freebsd	21	#ifdef _WIN32
37	# include <sys/socket.h>	22
38	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	24	# undef malloc
40	# include <sys/socket.h>	25	# undef free
41	# elif __solaris /* not yet */	26
42	# 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
43	# else	59	#else
44	# error sendfile support requested but not available	60
45	# 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
46	#endif	68	#endif
47		69
48	/* used for struct dirent, AIX doesn't provide it */	70	#define EIO_STRUCT_STAT Stat_t
49	#ifndef NAME_MAX	71
50	# define NAME_MAX 4096	72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
		75	#else
		76	# define SvVAL64 SvNV
51	#endif	77	#endif
52		78
53	#ifndef PTHREAD_STACK_MIN	79	static HV *stash;
54	/* care for broken platforms, e.g. windows */	80	typedef SV SV8; /* byte-sv, used for argument-checking */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif
65
66	/* buffer size for various temporary buffers */
67	#define AIO_BUFSIZE 65536
68
69	#define dBUF \
70	char *aio_buf; \
71	LOCK (wrklock); \
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73	UNLOCK (wrklock); \
74	if (!aio_buf) \
75	return -1;
76
77	enum {
78	REQ_QUIT,
79	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
83	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85	REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,
87	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,
89	};
90		81
91	#define AIO_REQ_KLASS "IO::AIO::REQ"	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
92	#define AIO_GRP_KLASS "IO::AIO::GRP"	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
93		84
94	typedef struct aio_cb	85	#define EIO_COMMON \
95	{
96	struct aio_cb *volatile next;
97
98	SV *data, *callback;	86	SV *callback; \
99	SV *fh, *fh2;	87	SV *sv1, *sv2; \
100	void *dataptr, *data2ptr;
101	Stat_t *statdata;
102	off_t offset;
103	size_t length;
104	ssize_t result;
105
106	STRLEN dataoffset;	88	STRLEN stroffset; \
107	int type;	89	SV *self
108	int fd, fd2;
109	int errorno;
110	mode_t mode; /* open */
111		90
112	unsigned char flags;	91	#include "libeio/eio.h"
113	unsigned char pri;
114		92
115	SV *self; /* the perl counterpart of this request, if any */	93	static int req_invoke (eio_req *req);
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	94	#define EIO_FINISH(req) req_invoke (req)
117	} aio_cb;	95	static void aio_grp_feed (eio_req *grp);
		96	#define EIO_FEED(req) aio_grp_feed (req)
		97	static void req_destroy (eio_req *grp);
		98	#define EIO_DESTROY(req) req_destroy (req)
118		99
119	enum {	100	enum {
120	FLAG_CANCELLED = 0x01,	101	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
121	};	102	};
122		103
		104	#include "libeio/eio.c"
		105
123	typedef aio_cb *aio_req;	106	typedef eio_req *aio_req;
124	typedef aio_cb *aio_req_ornot;	107	typedef eio_req *aio_req_ornot;
125		108
126	enum {	109	static SV *on_next_submit;
127	PRI_MIN = -4,
128	PRI_MAX = 4,
129
130	DEFAULT_PRI = 0,
131	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};
134
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;	110	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
		111	static int max_outstanding;
136		112
137	static unsigned int started, wanted;	113	static int respipe_osf [2], respipe [2] = { -1, -1 };
138	static volatile unsigned int nreqs;
139	static volatile unsigned int max_outstanding = 0xffffffff;
140	static int respipe [2];
141		114
142	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
143	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
144	#else
145	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
146	#endif
147
148	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
149	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
150
151	/* worker threads management */
152	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
153
154	typedef struct worker {
155	/* locked by wrklock */
156	struct worker *prev, *next;
157
158	pthread_t tid;
159
160	/* locked by reslock, reqlock or wrklock */
161	aio_req req; /* currently processed request */
162	void *dbuf;
163	DIR *dirp;
164	} worker;
165
166	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
167
168	static void worker_clear (worker *wrk)
169	{
170	if (wrk->dirp)
171	{
172	closedir (wrk->dirp);
173	wrk->dirp = 0;
174	}
175
176	if (wrk->dbuf)
177	{
178	free (wrk->dbuf);
179	wrk->dbuf = 0;
180	}
181	}
182
183	static void worker_free (worker *wrk)
184	{
185	wrk->next->prev = wrk->prev;
186	wrk->prev->next = wrk->next;
187
188	free (wrk);
189	}
190
191	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
192	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
193	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
194
195	/*
196	* a somewhat faster data structure might be nice, but
197	* with 8 priorities this actually needs <20 insns
198	* per shift, the most expensive operation.
199	*/
200	typedef struct {
201	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
202	int size;
203	} reqq;
204
205	static reqq req_queue;
206	static reqq res_queue;
207
208	int reqq_push (reqq *q, aio_req req)
209	{
210	int pri = req->pri;
211	req->next = 0;
212
213	if (q->qe[pri])
214	{
215	q->qe[pri]->next = req;
216	q->qe[pri] = req;
217	}
218	else
219	q->qe[pri] = q->qs[pri] = req;
220
221	return q->size++;
222	}
223
224	aio_req reqq_shift (reqq *q)
225	{
226	int pri;
227
228	if (!q->size)
229	return 0;
230
231	--q->size;
232
233	for (pri = NUM_PRI; pri--; )
234	{
235	aio_req req = q->qs[pri];
236
237	if (req)
238	{
239	if (!(q->qs[pri] = req->next))
240	q->qe[pri] = 0;
241
242	return req;
243	}
244	}
245
246	abort ();
247	}
248
249	static int poll_cb (int max);
250	static void req_invoke (aio_req req);
251	static void req_free (aio_req req);	115	static void req_destroy (aio_req req);
252	static void req_cancel (aio_req req);	116	static void req_cancel (aio_req req);
		117
		118	static void want_poll (void)
		119	{
		120	/* write a dummy byte to the pipe so fh becomes ready */
		121	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		122	}
		123
		124	static void done_poll (void)
		125	{
		126	/* read any signals sent by the worker threads */
		127	char buf [4];
		128	while (respipe_read (respipe [0], buf, 4) == 4)
		129	;
		130	}
253		131
254	/* must be called at most once */	132	/* must be called at most once */
255	static SV *req_sv (aio_req req, const char *klass)	133	static SV *req_sv (aio_req req, const char *klass)
256	{	134	{
257	if (!req->self)	135	if (!req->self)
…		…
275	return mg ? (aio_req)mg->mg_ptr : 0;	153	return mg ? (aio_req)mg->mg_ptr : 0;
276	}	154	}
277		155
278	static void aio_grp_feed (aio_req grp)	156	static void aio_grp_feed (aio_req grp)
279	{	157	{
280	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	158	if (grp->sv2 && SvOK (grp->sv2))
281	{	159	{
282	int old_len = grp->length;
283
284	if (grp->fh2 && SvOK (grp->fh2))
285	{
286	dSP;	160	dSP;
287		161
288	ENTER;	162	ENTER;
289	SAVETMPS;	163	SAVETMPS;
290	PUSHMARK (SP);	164	PUSHMARK (SP);
291	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	165	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
292	PUTBACK;	166	PUTBACK;
293	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	167	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
294	SPAGAIN;	168	SPAGAIN;
295	FREETMPS;	169	FREETMPS;
296	LEAVE;	170	LEAVE;
297	}
298
299	/* stop if no progress has been made */
300	if (old_len == grp->length)
301	{
302	SvREFCNT_dec (grp->fh2);
303	grp->fh2 = 0;
304	break;
305	}
306	}	171	}
307	}	172	}
308		173
309	static void aio_grp_dec (aio_req grp)	174	static void req_submit (eio_req *req)
310	{	175	{
311	--grp->length;	176	eio_submit (req);
312		177
313	/* call feeder, if applicable */	178	if (on_next_submit)
314	aio_grp_feed (grp);
315
316	/* finish, if done */
317	if (!grp->length && grp->fd)
318	{	179	{
319	req_invoke (grp);	180	dSP;
320	req_free (grp);	181	SV *cb = sv_2mortal (on_next_submit);
		182
		183	on_next_submit = 0;
		184
		185	PUSHMARK (SP);
		186	PUTBACK;
		187	call_sv (cb, G_DISCARD | G_EVAL);
321	}	188	}
322	}	189	}
323		190
324	static void poll_wait ()	191	static int req_invoke (eio_req *req)
325	{	192	{
326	fd_set rfd;	193	dSP;
327		194
328	while (nreqs)	195	if (req->flags & FLAG_SV2_RO_OFF)
		196	SvREADONLY_off (req->sv2);
		197
		198	if (!EIO_CANCELLED (req) && SvOK (req->callback))
329	{	199	{
330	int size;
331	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
332	LOCK (reslock);
333	#endif
334	size = res_queue.size;
335	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
336	UNLOCK (reslock);
337	#endif
338
339	if (size)
340	return;
341
342	FD_ZERO(&rfd);
343	FD_SET(respipe [0], &rfd);
344
345	select (respipe [0] + 1, &rfd, 0, 0, 0);
346	}
347	}
348
349	static void req_invoke (aio_req req)
350	{
351	dSP;
352
353	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
354	{
355	errno = req->errorno;
356
357	ENTER;	200	ENTER;
358	SAVETMPS;	201	SAVETMPS;
359	PUSHMARK (SP);	202	PUSHMARK (SP);
360	EXTEND (SP, 1);	203	EXTEND (SP, 1);
361		204
362	switch (req->type)	205	switch (req->type)
363	{	206	{
364	case REQ_READDIR:	207	case EIO_READDIR:
365	{	208	{
366	SV *rv = &PL_sv_undef;	209	SV *rv = &PL_sv_undef;
367		210
368	if (req->result >= 0)	211	if (req->result >= 0)
369	{	212	{
370	int i;	213	int i;
371	char *buf = req->data2ptr;	214	char *buf = req->ptr2;
372	AV *av = newAV ();	215	AV *av = newAV ();
373		216
374	av_extend (av, req->result - 1);	217	av_extend (av, req->result - 1);
375		218
376	for (i = 0; i < req->result; ++i)	219	for (i = 0; i < req->result; ++i)
…		…
386		229
387	PUSHs (rv);	230	PUSHs (rv);
388	}	231	}
389	break;	232	break;
390		233
391	case REQ_OPEN:	234	case EIO_OPEN:
392	{	235	{
393	/* convert fd to fh */	236	/* convert fd to fh */
394	SV *fh;	237	SV *fh = &PL_sv_undef;
395		238
396	PUSHs (sv_2mortal (newSViv (req->result)));	239	if (req->result >= 0)
397	PUTBACK;	240	{
398	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	241	GV *gv = (GV *)sv_newmortal ();
399	SPAGAIN;	242	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		243	char sym [64];
		244	int symlen;
		245
		246	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		247	gv_init (gv, stash, sym, symlen, 0);
400		248
401	fh = SvREFCNT_inc (POPs);	249	symlen = snprintf (
		250	sym,
		251	sizeof (sym),
		252	"%s&=%d",
		253	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		254	req->result
		255	);
402		256
		257	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		258	fh = (SV *)gv;
		259	}
		260
403	PUSHMARK (SP);	261	PUSHs (fh);
404	XPUSHs (sv_2mortal (fh));
405	}	262	}
406	break;	263	break;
407		264
408	case REQ_GROUP:	265	case EIO_GROUP:
409	req->fd = 2; /* mark group as finished */	266	req->int1 = 2; /* mark group as finished */
410		267
411	if (req->data)	268	if (req->sv1)
412	{	269	{
413	int i;	270	int i;
414	AV *av = (AV *)req->data;	271	AV *av = (AV *)req->sv1;
415		272
416	EXTEND (SP, AvFILL (av) + 1);	273	EXTEND (SP, AvFILL (av) + 1);
417	for (i = 0; i <= AvFILL (av); ++i)	274	for (i = 0; i <= AvFILL (av); ++i)
418	PUSHs (*av_fetch (av, i, 0));	275	PUSHs (*av_fetch (av, i, 0));
419	}	276	}
420	break;	277	break;
421		278
422	case REQ_NOP:	279	case EIO_NOP:
423	case REQ_BUSY:	280	case EIO_BUSY:
424	break;	281	break;
		282
		283	case EIO_READLINK:
		284	if (req->result > 0)
		285	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		286	break;
		287
		288	case EIO_STAT:
		289	case EIO_LSTAT:
		290	case EIO_FSTAT:
		291	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		292	PL_laststatval = req->result;
		293	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		294	PUSHs (sv_2mortal (newSViv (req->result)));
		295	break;
		296
		297	case EIO_READ:
		298	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		299	*SvEND (req->sv2) = 0;
		300	PUSHs (sv_2mortal (newSViv (req->result)));
		301	break;
		302
		303	case EIO_DUP2:
		304	if (req->result > 0)
		305	req->result = 0;
		306	/* FALLTHROUGH */
425		307
426	default:	308	default:
427	PUSHs (sv_2mortal (newSViv (req->result)));	309	PUSHs (sv_2mortal (newSViv (req->result)));
428	break;	310	break;
429	}	311	}
430		312
		313	errno = req->errorno;
431		314
432	PUTBACK;	315	PUTBACK;
433	call_sv (req->callback, G_VOID | G_EVAL);	316	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
434	SPAGAIN;	317	SPAGAIN;
435		318
436	FREETMPS;	319	FREETMPS;
437	LEAVE;	320	LEAVE;
		321
		322	PUTBACK;
438	}	323	}
439		324
440	if (req->grp)	325	return !!SvTRUE (ERRSV);
441	{
442	aio_req grp = req->grp;
443
444	/* unlink request */
445	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
446	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
447
448	if (grp->grp_first == req)
449	grp->grp_first = req->grp_next;
450
451	aio_grp_dec (grp);
452	}
453
454	if (SvTRUE (ERRSV))
455	{
456	req_free (req);
457	croak (0);
458	}
459	}	326	}
460		327
461	static void req_free (aio_req req)	328	static void req_destroy (aio_req req)
462	{	329	{
463	if (req->self)	330	if (req->self)
464	{	331	{
465	sv_unmagic (req->self, PERL_MAGIC_ext);	332	sv_unmagic (req->self, PERL_MAGIC_ext);
466	SvREFCNT_dec (req->self);	333	SvREFCNT_dec (req->self);
467	}	334	}
468		335
469	SvREFCNT_dec (req->data);
470	SvREFCNT_dec (req->fh);	336	SvREFCNT_dec (req->sv1);
471	SvREFCNT_dec (req->fh2);	337	SvREFCNT_dec (req->sv2);
472	SvREFCNT_dec (req->callback);	338	SvREFCNT_dec (req->callback);
473	Safefree (req->statdata);
474
475	if (req->type == REQ_READDIR)
476	free (req->data2ptr);
477		339
478	Safefree (req);	340	Safefree (req);
479	}	341	}
480		342
481	static void req_cancel_subs (aio_req grp)	343	static void req_cancel_subs (aio_req grp)
482	{	344	{
483	aio_req sub;	345	aio_req sub;
484		346
485	if (grp->type != REQ_GROUP)	347	if (grp->type != EIO_GROUP)
486	return;	348	return;
487		349
488	SvREFCNT_dec (grp->fh2);	350	SvREFCNT_dec (grp->sv2);
489	grp->fh2 = 0;	351	grp->sv2 = 0;
490		352
491	for (sub = grp->grp_first; sub; sub = sub->grp_next)	353	eio_grp_cancel (grp);
492	req_cancel (sub);
493	}	354	}
494		355
495	static void req_cancel (aio_req req)	356	#ifdef USE_SOCKETS_AS_HANDLES
496	{	357	# define TO_SOCKET(x) (win32_get_osfhandle (x))
497	req->flags |= FLAG_CANCELLED;	358	#else
		359	# define TO_SOCKET(x) (x)
		360	#endif
498		361
499	req_cancel_subs (req);	362	static void
500	}	363	create_respipe (void)
501
502	static int poll_cb (int max)
503	{	364	{
504	dSP;	365	int old_readfd = respipe [0];
505	int count = 0;
506	int do_croak = 0;
507	aio_req req;
508		366
509	for (;;)	367	if (respipe [1] >= 0)
		368	respipe_close (TO_SOCKET (respipe [1]));
		369
		370	#ifdef _WIN32
		371	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		372	#else
		373	if (pipe (respipe))
		374	#endif
		375	croak ("unable to initialize result pipe");
		376
		377	if (old_readfd >= 0)
510	{	378	{
511	while (max <= 0 || count < max)	379	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
512	{	380	croak ("unable to initialize result pipe(2)");
513	LOCK (reslock);
514	req = reqq_shift (&res_queue);
515		381
516	if (req)	382	respipe_close (respipe [0]);
517	{	383	respipe [0] = old_readfd;
518	if (!res_queue.size)
519	{
520	/* read any signals sent by the worker threads */
521	char buf [32];
522	while (read (respipe [0], buf, 32) == 32)
523	;
524	}
525	}
526
527	UNLOCK (reslock);
528
529	if (!req)
530	break;
531
532	--nreqs;
533
534	if (req->type == REQ_QUIT)
535	--started;
536	else if (req->type == REQ_GROUP && req->length)
537	{
538	req->fd = 1; /* mark request as delayed */
539	continue;
540	}
541	else
542	{
543	if (req->type == REQ_READ)
544	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
545
546	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
547	SvREADONLY_off (req->data);
548
549	if (req->statdata)
550	{
551	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
552	PL_laststatval = req->result;
553	PL_statcache = *(req->statdata);
554	}
555
556	req_invoke (req);
557
558	count++;
559	}
560
561	req_free (req);
562	}
563
564	if (nreqs <= max_outstanding)
565	break;
566
567	poll_wait ();
568
569	max = 0;
570	}	384	}
571		385
572	return count;	386	#ifdef _WIN32
573	}	387	int arg = 1;
		388	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		389	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		390	#else
		391	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		392	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		393	#endif
		394	croak ("unable to initialize result pipe(3)");
574		395
575	static void *aio_proc(void *arg);	396	respipe_osf [0] = TO_SOCKET (respipe [0]);
		397	respipe_osf [1] = TO_SOCKET (respipe [1]);
		398	}
576		399
577	static void start_thread (void)	400	static void poll_wait (void)
578	{	401	{
579	sigset_t fullsigset, oldsigset;	402	fd_set rfd;
580	pthread_attr_t attr;
581		403
582	worker *wrk = calloc (1, sizeof (worker));	404	while (eio_nreqs ())
583
584	if (!wrk)
585	croak ("unable to allocate worker thread data");
586
587	pthread_attr_init (&attr);
588	pthread_attr_setstacksize (&attr, STACKSIZE);
589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
590
591	sigfillset (&fullsigset);
592
593	LOCK (wrklock);
594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
595
596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597	{	405	{
598	wrk->prev = &wrk_first;	406	int size;
599	wrk->next = wrk_first.next;	407
600	wrk_first.next->prev = wrk;	408	X_LOCK (reslock);
601	wrk_first.next = wrk;	409	size = res_queue.size;
602	++started;	410	X_UNLOCK (reslock);
		411
		412	if (size)
		413	return;
		414
		415	maybe_start_thread ();
		416
		417	FD_ZERO (&rfd);
		418	FD_SET (respipe [0], &rfd);
		419
		420	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
603	}	421	}
604	else
605	free (wrk);
606
607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
608	UNLOCK (wrklock);
609	}	422	}
610		423
611	static void req_send (aio_req req)	424	static int poll_cb (void)
612	{	425	{
613	while (started < wanted && nreqs >= started)	426	int res;
614	start_thread ();
615		427
616	++nreqs;	428	do
617
618	LOCK (reqlock);
619	reqq_push (&req_queue, req);
620	pthread_cond_signal (&reqwait);
621	UNLOCK (reqlock);
622	}
623
624	static void end_thread (void)
625	{
626	aio_req req;
627
628	Newz (0, req, 1, aio_cb);
629
630	req->type = REQ_QUIT;
631	req->pri = PRI_MAX + PRI_BIAS;
632
633	req_send (req);
634	}
635
636	static void min_parallel (int nthreads)
637	{
638	if (wanted < nthreads)
639	wanted = nthreads;
640	}
641
642	static void max_parallel (int nthreads)
643	{
644	int cur = started;
645
646	if (wanted > nthreads)
647	wanted = nthreads;
648
649	while (cur > wanted)
650	{	429	{
651	end_thread ();	430	res = eio_poll ();
652	cur--;	431
		432	if (res > 0)
		433	croak (0);
653	}	434	}
654		435	while (max_outstanding && max_outstanding <= eio_nreqs ());
655	while (started > wanted)
656	{
657	poll_wait ();
658	poll_cb (0);
659	}
660	}
661
662	static void create_pipe ()
663	{
664	if (pipe (respipe))
665	croak ("unable to initialize result pipe");
666
667	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
668	croak ("cannot set result pipe to nonblocking mode");
669
670	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
671	croak ("cannot set result pipe to nonblocking mode");
672	}
673
674	/*****************************************************************************/
675	/* work around various missing functions */
676
677	#if !HAVE_PREADWRITE
678	# define pread aio_pread
679	# define pwrite aio_pwrite
680
681	/*
682	* make our pread/pwrite safe against themselves, but not against
683	* normal read/write by using a mutex. slows down execution a lot,
684	* but that's your problem, not mine.
685	*/
686	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
687
688	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
689	{
690	ssize_t res;
691	off_t ooffset;
692
693	LOCK (preadwritelock);
694	ooffset = lseek (fd, 0, SEEK_CUR);
695	lseek (fd, offset, SEEK_SET);
696	res = read (fd, buf, count);
697	lseek (fd, ooffset, SEEK_SET);
698	UNLOCK (preadwritelock);
699		436
700	return res;	437	return res;
701	}	438	}
702		439
703	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
704	{
705	ssize_t res;
706	off_t ooffset;
707
708	LOCK (preadwritelock);
709	ooffset = lseek (fd, 0, SEEK_CUR);
710	lseek (fd, offset, SEEK_SET);
711	res = write (fd, buf, count);
712	lseek (fd, offset, SEEK_SET);
713	UNLOCK (preadwritelock);
714
715	return res;
716	}
717	#endif
718
719	#if !HAVE_FDATASYNC
720	# define fdatasync fsync
721	#endif
722
723	#if !HAVE_READAHEAD
724	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
725
726	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
727	{
728	dBUF;
729
730	while (count > 0)
731	{
732	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
733
734	pread (fd, aio_buf, len, offset);
735	offset += len;
736	count -= len;
737	}
738
739	errno = 0;
740	}
741
742	#endif
743
744	#if !HAVE_READDIR_R
745	# define readdir_r aio_readdir_r
746
747	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
748
749	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
750	{
751	struct dirent *e;
752	int errorno;
753
754	LOCK (readdirlock);
755
756	e = readdir (dirp);
757	errorno = errno;
758
759	if (e)
760	{
761	*res = ent;
762	strcpy (ent->d_name, e->d_name);
763	}
764	else
765	*res = 0;
766
767	UNLOCK (readdirlock);
768
769	errno = errorno;
770	return e ? 0 : -1;
771	}
772	#endif
773
774	/* sendfile always needs emulation */
775	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
776	{
777	ssize_t res;
778
779	if (!count)
780	return 0;
781
782	#if HAVE_SENDFILE
783	# if __linux
784	res = sendfile (ofd, ifd, &offset, count);
785
786	# elif __freebsd
787	/*
788	* Of course, the freebsd sendfile is a dire hack with no thoughts
789	* wasted on making it similar to other I/O functions.
790	*/
791	{
792	off_t sbytes;
793	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
794
795	if (res < 0 && sbytes)
796	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
797	res = sbytes;
798	}
799
800	# elif __hpux
801	res = sendfile (ofd, ifd, offset, count, 0, 0);
802
803	# elif __solaris
804	{
805	struct sendfilevec vec;
806	size_t sbytes;
807
808	vec.sfv_fd = ifd;
809	vec.sfv_flag = 0;
810	vec.sfv_off = offset;
811	vec.sfv_len = count;
812
813	res = sendfilev (ofd, &vec, 1, &sbytes);
814
815	if (res < 0 && sbytes)
816	res = sbytes;
817	}
818
819	# endif
820	#else
821	res = -1;
822	errno = ENOSYS;
823	#endif
824
825	if (res < 0
826	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
827	#if __solaris
828	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
829	#endif
830	)
831	)
832	{
833	/* emulate sendfile. this is a major pain in the ass */
834	dBUF;
835
836	res = 0;
837
838	while (count)
839	{
840	ssize_t cnt;
841
842	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
843
844	if (cnt <= 0)
845	{
846	if (cnt && !res) res = -1;
847	break;
848	}
849
850	cnt = write (ofd, aio_buf, cnt);
851
852	if (cnt <= 0)
853	{
854	if (cnt && !res) res = -1;
855	break;
856	}
857
858	offset += cnt;
859	res += cnt;
860	count -= cnt;
861	}
862	}
863
864	return res;
865	}
866
867	/* read a full directory */
868	static void scandir_ (aio_req req, worker *self)
869	{
870	DIR *dirp;
871	union
872	{
873	struct dirent d;
874	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
875	} *u;
876	struct dirent *entp;
877	char *name, *names;
878	int memlen = 4096;
879	int memofs = 0;
880	int res = 0;
881	int errorno;
882
883	LOCK (wrklock);
884	self->dirp = dirp = opendir (req->dataptr);
885	self->dbuf = u = malloc (sizeof (*u));
886	req->data2ptr = names = malloc (memlen);
887	UNLOCK (wrklock);
888
889	if (dirp && u && names)
890	for (;;)
891	{
892	errno = 0;
893	readdir_r (dirp, &u->d, &entp);
894
895	if (!entp)
896	break;
897
898	name = entp->d_name;
899
900	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
901	{
902	int len = strlen (name) + 1;
903
904	res++;
905
906	while (memofs + len > memlen)
907	{
908	memlen *= 2;
909	LOCK (wrklock);
910	req->data2ptr = names = realloc (names, memlen);
911	UNLOCK (wrklock);
912
913	if (!names)
914	break;
915	}
916
917	memcpy (names + memofs, name, len);
918	memofs += len;
919	}
920	}
921
922	if (errno)
923	res = -1;
924
925	req->result = res;
926	}
927
928	/*****************************************************************************/
929
930	static void *aio_proc (void *thr_arg)
931	{
932	aio_req req;
933	int type;
934	worker *self = (worker *)thr_arg;
935
936	do
937	{
938	LOCK (reqlock);
939
940	for (;;)
941	{
942	self->req = req = reqq_shift (&req_queue);
943
944	if (req)
945	break;
946
947	pthread_cond_wait (&reqwait, &reqlock);
948	}
949
950	UNLOCK (reqlock);
951
952	errno = 0; /* strictly unnecessary */
953	type = req->type; /* remember type for QUIT check */
954
955	if (!(req->flags & FLAG_CANCELLED))
956	switch (type)
957	{
958	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
959	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
960
961	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
962	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
963
964	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
965	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
966	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
967
968	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
969	case REQ_CLOSE: req->result = close (req->fd); break;
970	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
971	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
972	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
973	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
974	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
975
976	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
977	case REQ_FSYNC: req->result = fsync (req->fd); break;
978	case REQ_READDIR: scandir_ (req, self); break;
979
980	case REQ_BUSY:
981	{
982	struct timeval tv;
983
984	tv.tv_sec = req->fd;
985	tv.tv_usec = req->fd2;
986
987	req->result = select (0, 0, 0, 0, &tv);
988	}
989
990	case REQ_GROUP:
991	case REQ_NOP:
992	case REQ_QUIT:
993	break;
994
995	default:
996	req->result = ENOSYS;
997	break;
998	}
999
1000	req->errorno = errno;
1001
1002	LOCK (reslock);
1003
1004	if (!reqq_push (&res_queue, req))
1005	/* write a dummy byte to the pipe so fh becomes ready */
1006	write (respipe [1], &respipe, 1);
1007
1008	self->req = 0;
1009	worker_clear (self);
1010
1011	UNLOCK (reslock);
1012	}
1013	while (type != REQ_QUIT);
1014
1015	LOCK (wrklock);
1016	worker_free (self);
1017	UNLOCK (wrklock);
1018
1019	return 0;
1020	}
1021
1022	/*****************************************************************************/
1023
1024	static void atfork_prepare (void)
1025	{
1026	LOCK (wrklock);
1027	LOCK (reqlock);
1028	LOCK (reslock);
1029	#if !HAVE_PREADWRITE
1030	LOCK (preadwritelock);
1031	#endif
1032	#if !HAVE_READDIR_R
1033	LOCK (readdirlock);
1034	#endif
1035	}
1036
1037	static void atfork_parent (void)
1038	{
1039	#if !HAVE_READDIR_R
1040	UNLOCK (readdirlock);
1041	#endif
1042	#if !HAVE_PREADWRITE
1043	UNLOCK (preadwritelock);
1044	#endif
1045	UNLOCK (reslock);
1046	UNLOCK (reqlock);
1047	UNLOCK (wrklock);
1048	}
1049
1050	static void atfork_child (void)	440	static void atfork_child (void)
1051	{	441	{
1052	aio_req prv;
1053
1054	while (prv = reqq_shift (&req_queue))
1055	req_free (prv);
1056
1057	while (prv = reqq_shift (&res_queue))
1058	req_free (prv);
1059
1060	while (wrk_first.next != &wrk_first)
1061	{
1062	worker *wrk = wrk_first.next;
1063
1064	if (wrk->req)
1065	req_free (wrk->req);
1066
1067	worker_clear (wrk);
1068	worker_free (wrk);
1069	}
1070
1071	started = 0;
1072	nreqs = 0;
1073
1074	close (respipe [0]);
1075	close (respipe [1]);
1076	create_pipe ();	442	create_respipe ();
1077
1078	atfork_parent ();
1079	}	443	}
1080		444
1081	#define dREQ \	445	#define dREQ \
1082	aio_req req; \	446	aio_req req; \
1083	int req_pri = next_pri; \	447	int req_pri = next_pri; \
1084	next_pri = DEFAULT_PRI + PRI_BIAS; \	448	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1085	\	449	\
1086	if (SvOK (callback) && !SvROK (callback)) \	450	if (SvOK (callback) && !SvROK (callback)) \
1087	croak ("callback must be undef or of reference type"); \	451	croak ("callback must be undef or of reference type"); \
1088	\	452	\
1089	Newz (0, req, 1, aio_cb); \	453	Newz (0, req, 1, eio_req); \
1090	if (!req) \	454	if (!req) \
1091	croak ("out of memory during aio_req allocation"); \	455	croak ("out of memory during eio_req allocation"); \
1092	\	456	\
1093	req->callback = newSVsv (callback); \	457	req->callback = newSVsv (callback); \
1094	req->pri = req_pri	458	req->pri = req_pri
1095		459
1096	#define REQ_SEND \	460	#define REQ_SEND \
1097	req_send (req); \	461	req_submit (req); \
1098	\	462	\
1099	if (GIMME_V != G_VOID) \	463	if (GIMME_V != G_VOID) \
1100	XPUSHs (req_sv (req, AIO_REQ_KLASS));	464	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1101		465
1102	MODULE = IO::AIO PACKAGE = IO::AIO	466	MODULE = IO::AIO PACKAGE = IO::AIO
1103		467
1104	PROTOTYPES: ENABLE	468	PROTOTYPES: ENABLE
1105		469
1106	BOOT:	470	BOOT:
1107	{	471	{
1108	HV *stash = gv_stashpv ("IO::AIO", 1);	472	stash = gv_stashpv ("IO::AIO", 1);
		473
1109	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	474	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1110	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	475	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1111	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	476	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		477	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		478	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		479	#ifdef _WIN32
		480	X_MUTEX_CHECK (wrklock);
		481	X_MUTEX_CHECK (reslock);
		482	X_MUTEX_CHECK (reqlock);
		483	X_MUTEX_CHECK (reqwait);
		484	X_MUTEX_CHECK (preadwritelock);
		485	X_MUTEX_CHECK (readdirlock);
1112		486
1113	create_pipe ();	487	X_COND_CHECK (reqwait);
1114	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	488	#else
		489	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		490	#endif
		491
		492	create_respipe ();
		493
		494	if (eio_init (want_poll, done_poll) < 0)
		495	croak ("IO::AIO: unable to initialise eio library");
		496
		497	/* atfork child called in fifo order, so before eio's handler */
		498	X_THREAD_ATFORK (0, 0, atfork_child);
1115	}	499	}
		500
		501	void
		502	max_poll_reqs (int nreqs)
		503	PROTOTYPE: $
		504	CODE:
		505	eio_set_max_poll_reqs (nreqs);
		506
		507	void
		508	max_poll_time (double nseconds)
		509	PROTOTYPE: $
		510	CODE:
		511	eio_set_max_poll_time (nseconds);
1116		512
1117	void	513	void
1118	min_parallel (int nthreads)	514	min_parallel (int nthreads)
1119	PROTOTYPE: $	515	PROTOTYPE: $
		516	CODE:
		517	eio_set_min_parallel (nthreads);
1120		518
1121	void	519	void
1122	max_parallel (int nthreads)	520	max_parallel (int nthreads)
1123	PROTOTYPE: $	521	PROTOTYPE: $
		522	CODE:
		523	eio_set_max_parallel (nthreads);
1124		524
1125	int	525	void
		526	max_idle (int nthreads)
		527	PROTOTYPE: $
		528	CODE:
		529	eio_set_max_idle (nthreads);
		530
		531	void
1126	max_outstanding (int maxreqs)	532	max_outstanding (int maxreqs)
1127	PROTOTYPE: $	533	PROTOTYPE: $
1128	CODE:	534	CODE:
1129	RETVAL = max_outstanding;
1130	max_outstanding = maxreqs;	535	max_outstanding = maxreqs;
1131	OUTPUT:
1132	RETVAL
1133		536
1134	void	537	void
1135	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	538	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1136	SV * pathname
1137	int flags
1138	int mode
1139	SV * callback
1140	PROTOTYPE: $$$;$	539	PROTOTYPE: $$$;$
1141	PPCODE:	540	PPCODE:
1142	{	541	{
1143	dREQ;	542	dREQ;
1144		543
1145	req->type = REQ_OPEN;	544	req->type = EIO_OPEN;
1146	req->data = newSVsv (pathname);	545	req->sv1 = newSVsv (pathname);
1147	req->dataptr = SvPVbyte_nolen (req->data);	546	req->ptr1 = SvPVbyte_nolen (req->sv1);
1148	req->fd = flags;	547	req->int1 = flags;
1149	req->mode = mode;	548	req->int2 = mode;
1150		549
1151	REQ_SEND;	550	REQ_SEND;
1152	}	551	}
1153		552
1154	void	553	void
1155	aio_close (fh,callback=&PL_sv_undef)	554	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1156	SV * fh
1157	SV * callback
1158	PROTOTYPE: $;$	555	PROTOTYPE: $;$
1159	ALIAS:	556	ALIAS:
1160	aio_close = REQ_CLOSE
1161	aio_fsync = REQ_FSYNC	557	aio_fsync = EIO_FSYNC
1162	aio_fdatasync = REQ_FDATASYNC	558	aio_fdatasync = EIO_FDATASYNC
1163	PPCODE:	559	PPCODE:
1164	{	560	{
1165	dREQ;	561	dREQ;
1166		562
1167	req->type = ix;	563	req->type = ix;
1168	req->fh = newSVsv (fh);	564	req->sv1 = newSVsv (fh);
1169	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	565	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1170		566
1171	REQ_SEND (req);	567	REQ_SEND (req);
1172	}	568	}
1173		569
1174	void	570	void
		571	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		572	PROTOTYPE: $;$
		573	PPCODE:
		574	{
		575	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		576	dREQ;
		577
		578	if (close_pipe < 0)
		579	{
		580	int pipefd [2];
		581
		582	if (pipe (pipefd) < 0
		583	|| close (pipefd [1]) < 0
		584	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		585	abort (); /*D*/
		586
		587	close_pipe = pipefd [0];
		588	}
		589
		590	req->type = EIO_DUP2;
		591	req->int1 = close_pipe;
		592	req->sv2 = newSVsv (fh);
		593	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		594
		595	REQ_SEND (req);
		596	}
		597
		598	void
1175	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	599	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	UV length
1179	SV * data
1180	UV dataoffset
1181	SV * callback
1182	ALIAS:	600	ALIAS:
1183	aio_read = REQ_READ	601	aio_read = EIO_READ
1184	aio_write = REQ_WRITE	602	aio_write = EIO_WRITE
1185	PROTOTYPE: $$$$$;$	603	PROTOTYPE: $$$$$;$
1186	PPCODE:	604	PPCODE:
1187	{	605	{
1188	aio_req req;
1189	STRLEN svlen;	606	STRLEN svlen;
1190	char *svptr = SvPVbyte (data, svlen);	607	char *svptr = SvPVbyte (data, svlen);
		608	UV len = SvUV (length);
1191		609
1192	SvUPGRADE (data, SVt_PV);	610	SvUPGRADE (data, SVt_PV);
1193	SvPOK_on (data);	611	SvPOK_on (data);
1194		612
1195	if (dataoffset < 0)	613	if (dataoffset < 0)
1196	dataoffset += svlen;	614	dataoffset += svlen;
1197		615
1198	if (dataoffset < 0 || dataoffset > svlen)	616	if (dataoffset < 0 || dataoffset > svlen)
1199	croak ("data offset outside of string");	617	croak ("dataoffset outside of data scalar");
1200		618
1201	if (ix == REQ_WRITE)	619	if (ix == EIO_WRITE)
1202	{	620	{
1203	/* write: check length and adjust. */	621	/* write: check length and adjust. */
1204	if (length < 0 || length + dataoffset > svlen)	622	if (!SvOK (length) || len + dataoffset > svlen)
1205	length = svlen - dataoffset;	623	len = svlen - dataoffset;
1206	}	624	}
1207	else	625	else
1208	{	626	{
1209	/* read: grow scalar as necessary */	627	/* read: grow scalar as necessary */
1210	svptr = SvGROW (data, length + dataoffset);	628	svptr = SvGROW (data, len + dataoffset + 1);
1211	}	629	}
1212		630
1213	if (length < 0)	631	if (len < 0)
1214	croak ("length must not be negative");	632	croak ("length must not be negative");
1215		633
1216	{	634	{
1217	dREQ;	635	dREQ;
1218		636
1219	req->type = ix;	637	req->type = ix;
1220	req->fh = newSVsv (fh);	638	req->sv1 = newSVsv (fh);
1221	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	639	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1222	: IoOFP (sv_2io (fh)));	640	: IoOFP (sv_2io (fh)));
		641	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1223	req->offset = offset;	642	req->size = len;
1224	req->length = length;
1225	req->data = SvREFCNT_inc (data);	643	req->sv2 = SvREFCNT_inc (data);
1226	req->dataptr = (char *)svptr + dataoffset;	644	req->ptr2 = (char *)svptr + dataoffset;
		645	req->stroffset = dataoffset;
1227		646
1228	if (!SvREADONLY (data))	647	if (!SvREADONLY (data))
1229	{	648	{
1230	SvREADONLY_on (data);	649	SvREADONLY_on (data);
1231	req->data2ptr = (void *)data;	650	req->flags |= FLAG_SV2_RO_OFF;
1232	}	651	}
1233		652
1234	REQ_SEND;	653	REQ_SEND;
1235	}	654	}
1236	}	655	}
1237		656
1238	void	657	void
		658	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		659	PROTOTYPE: $$;$
		660	PPCODE:
		661	{
		662	SV *data;
		663	dREQ;
		664
		665	req->type = EIO_READLINK;
		666	req->sv1 = newSVsv (path);
		667	req->ptr1 = SvPVbyte_nolen (req->sv1);
		668
		669	REQ_SEND;
		670	}
		671
		672	void
1239	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	673	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1240	SV * out_fh
1241	SV * in_fh
1242	UV in_offset
1243	UV length
1244	SV * callback
1245	PROTOTYPE: $$$$;$	674	PROTOTYPE: $$$$;$
1246	PPCODE:	675	PPCODE:
1247	{	676	{
1248	dREQ;	677	dREQ;
1249		678
1250	req->type = REQ_SENDFILE;	679	req->type = EIO_SENDFILE;
1251	req->fh = newSVsv (out_fh);	680	req->sv1 = newSVsv (out_fh);
1252	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	681	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1253	req->fh2 = newSVsv (in_fh);	682	req->sv2 = newSVsv (in_fh);
1254	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	683	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1255	req->offset = in_offset;	684	req->offs = SvVAL64 (in_offset);
1256	req->length = length;	685	req->size = length;
1257		686
1258	REQ_SEND;	687	REQ_SEND;
1259	}	688	}
1260		689
1261	void	690	void
1262	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	691	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1263	SV * fh
1264	UV offset
1265	IV length
1266	SV * callback
1267	PROTOTYPE: $$$;$	692	PROTOTYPE: $$$;$
1268	PPCODE:	693	PPCODE:
1269	{	694	{
1270	dREQ;	695	dREQ;
1271		696
1272	req->type = REQ_READAHEAD;	697	req->type = EIO_READAHEAD;
1273	req->fh = newSVsv (fh);	698	req->sv1 = newSVsv (fh);
1274	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	699	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1275	req->offset = offset;	700	req->offs = SvVAL64 (offset);
1276	req->length = length;	701	req->size = length;
1277		702
1278	REQ_SEND;	703	REQ_SEND;
1279	}	704	}
1280		705
1281	void	706	void
1282	aio_stat (fh_or_path,callback=&PL_sv_undef)	707	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1283	SV * fh_or_path
1284	SV * callback
1285	ALIAS:	708	ALIAS:
1286	aio_stat = REQ_STAT	709	aio_stat = EIO_STAT
1287	aio_lstat = REQ_LSTAT	710	aio_lstat = EIO_LSTAT
1288	PPCODE:	711	PPCODE:
1289	{	712	{
1290	dREQ;	713	dREQ;
1291		714
1292	New (0, req->statdata, 1, Stat_t);	715	req->sv1 = newSVsv (fh_or_path);
1293	if (!req->statdata)
1294	{
1295	req_free (req);
1296	croak ("out of memory during aio_req->statdata allocation");
1297	}
1298		716
1299	if (SvPOK (fh_or_path))	717	if (SvPOK (req->sv1))
1300	{	718	{
1301	req->type = ix;	719	req->type = ix;
1302	req->data = newSVsv (fh_or_path);
1303	req->dataptr = SvPVbyte_nolen (req->data);	720	req->ptr1 = SvPVbyte_nolen (req->sv1);
1304	}	721	}
1305	else	722	else
1306	{	723	{
1307	req->type = REQ_FSTAT;	724	req->type = EIO_FSTAT;
1308	req->fh = newSVsv (fh_or_path);
1309	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	725	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1310	}	726	}
1311		727
1312	REQ_SEND;	728	REQ_SEND;
1313	}	729	}
1314		730
1315	void	731	void
		732	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		733	PPCODE:
		734	{
		735	dREQ;
		736
		737	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		738	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		739	req->sv1 = newSVsv (fh_or_path);
		740
		741	if (SvPOK (req->sv1))
		742	{
		743	req->type = EIO_UTIME;
		744	req->ptr1 = SvPVbyte_nolen (req->sv1);
		745	}
		746	else
		747	{
		748	req->type = EIO_FUTIME;
		749	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		750	}
		751
		752	REQ_SEND;
		753	}
		754
		755	void
		756	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		757	PPCODE:
		758	{
		759	dREQ;
		760
		761	req->sv1 = newSVsv (fh_or_path);
		762	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		763
		764	if (SvPOK (req->sv1))
		765	{
		766	req->type = EIO_TRUNCATE;
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768	}
		769	else
		770	{
		771	req->type = EIO_FTRUNCATE;
		772	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		773	}
		774
		775	REQ_SEND;
		776	}
		777
		778	void
		779	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		780	ALIAS:
		781	aio_chmod = EIO_CHMOD
		782	aio_mkdir = EIO_MKDIR
		783	PPCODE:
		784	{
		785	dREQ;
		786
		787	req->int2 = mode;
		788	req->sv1 = newSVsv (fh_or_path);
		789
		790	if (SvPOK (req->sv1))
		791	{
		792	req->type = ix;
		793	req->ptr1 = SvPVbyte_nolen (req->sv1);
		794	}
		795	else
		796	{
		797	req->type = EIO_FCHMOD;
		798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		799	}
		800
		801	REQ_SEND;
		802	}
		803
		804	void
		805	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		811	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
		815	{
		816	req->type = EIO_CHOWN;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FCHOWN;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
		824
		825	REQ_SEND;
		826	}
		827
		828	void
1316	aio_unlink (pathname,callback=&PL_sv_undef)	829	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1317	SV * pathname
1318	SV * callback
1319	ALIAS:	830	ALIAS:
1320	aio_unlink = REQ_UNLINK	831	aio_unlink = EIO_UNLINK
1321	aio_rmdir = REQ_RMDIR	832	aio_rmdir = EIO_RMDIR
1322	aio_readdir = REQ_READDIR	833	aio_readdir = EIO_READDIR
1323	PPCODE:	834	PPCODE:
1324	{	835	{
1325	dREQ;	836	dREQ;
1326		837
1327	req->type = ix;	838	req->type = ix;
1328	req->data = newSVsv (pathname);	839	req->sv1 = newSVsv (pathname);
1329	req->dataptr = SvPVbyte_nolen (req->data);	840	req->ptr1 = SvPVbyte_nolen (req->sv1);
		841
		842	REQ_SEND;
		843	}
		844
		845	void
		846	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		847	ALIAS:
		848	aio_link = EIO_LINK
		849	aio_symlink = EIO_SYMLINK
		850	aio_rename = EIO_RENAME
		851	PPCODE:
		852	{
		853	dREQ;
		854
		855	req->type = ix;
		856	req->sv1 = newSVsv (oldpath);
		857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858	req->sv2 = newSVsv (newpath);
		859	req->ptr2 = SvPVbyte_nolen (req->sv2);
1330		860
1331	REQ_SEND;	861	REQ_SEND;
1332	}	862	}
1333		863
1334	void	864	void
1335	aio_link (oldpath,newpath,callback=&PL_sv_undef)	865	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1336	SV * oldpath
1337	SV * newpath
1338	SV * callback
1339	ALIAS:
1340	aio_link = REQ_LINK
1341	aio_symlink = REQ_SYMLINK
1342	aio_rename = REQ_RENAME
1343	PPCODE:	866	PPCODE:
1344	{	867	{
1345	dREQ;	868	dREQ;
1346		869
1347	req->type = ix;	870	req->type = EIO_MKNOD;
1348	req->fh = newSVsv (oldpath);	871	req->sv1 = newSVsv (pathname);
1349	req->data2ptr = SvPVbyte_nolen (req->fh);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
1350	req->data = newSVsv (newpath);	873	req->int2 = (mode_t)mode;
1351	req->dataptr = SvPVbyte_nolen (req->data);	874	req->offs = dev;
1352		875
1353	REQ_SEND;	876	REQ_SEND;
1354	}	877	}
1355		878
1356	void	879	void
1357	aio_busy (delay,callback=&PL_sv_undef)	880	aio_busy (double delay, SV *callback=&PL_sv_undef)
1358	double delay
1359	SV * callback
1360	PPCODE:	881	PPCODE:
1361	{	882	{
1362	dREQ;	883	dREQ;
1363		884
1364	req->type = REQ_BUSY;	885	req->type = EIO_BUSY;
1365	req->fd = delay < 0. ? 0 : delay;	886	req->nv1 = delay < 0. ? 0. : delay;
1366	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1367		887
1368	REQ_SEND;	888	REQ_SEND;
1369	}	889	}
1370		890
1371	void	891	void
1372	aio_group (callback=&PL_sv_undef)	892	aio_group (SV *callback=&PL_sv_undef)
1373	SV * callback
1374	PROTOTYPE: ;$	893	PROTOTYPE: ;$
1375	PPCODE:	894	PPCODE:
1376	{	895	{
1377	dREQ;	896	dREQ;
1378		897
1379	req->type = REQ_GROUP;	898	req->type = EIO_GROUP;
		899
1380	req_send (req);	900	eio_submit (req);
1381
1382	XPUSHs (req_sv (req, AIO_GRP_KLASS));	901	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1383	}	902	}
1384		903
1385	void	904	void
1386	aio_nop (callback=&PL_sv_undef)	905	aio_nop (SV *callback=&PL_sv_undef)
1387	SV * callback	906	ALIAS:
		907	aio_nop = EIO_NOP
		908	aio_sync = EIO_SYNC
1388	PPCODE:	909	PPCODE:
1389	{	910	{
1390	dREQ;	911	dREQ;
1391		912
1392	req->type = REQ_NOP;	913	req->type = ix;
1393		914
1394	REQ_SEND;	915	REQ_SEND;
1395	}	916	}
1396		917
1397	void	918	int
1398	aioreq_pri (int pri = DEFAULT_PRI)	919	aioreq_pri (int pri = 0)
1399	CODE:	920	PROTOTYPE: ;$
		921	CODE:
		922	RETVAL = next_pri - EIO_PRI_BIAS;
		923	if (items > 0)
		924	{
1400	if (pri < PRI_MIN) pri = PRI_MIN;	925	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1401	if (pri > PRI_MAX) pri = PRI_MAX;	926	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1402	next_pri = pri + PRI_BIAS;	927	next_pri = pri + EIO_PRI_BIAS;
		928	}
		929	OUTPUT:
		930	RETVAL
1403		931
1404	void	932	void
1405	aioreq_nice (int nice = 0)	933	aioreq_nice (int nice = 0)
1406	CODE:	934	CODE:
1407	nice = next_pri - nice;	935	nice = next_pri - nice;
1408	if (nice < PRI_MIN) nice = PRI_MIN;	936	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1409	if (nice > PRI_MAX) nice = PRI_MAX;	937	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1410	next_pri = nice + PRI_BIAS;	938	next_pri = nice + EIO_PRI_BIAS;
1411		939
1412	void	940	void
1413	flush ()	941	flush ()
1414	PROTOTYPE:	942	PROTOTYPE:
1415	CODE:	943	CODE:
1416	while (nreqs)	944	while (eio_nreqs ())
1417	{	945	{
1418	poll_wait ();	946	poll_wait ();
1419	poll_cb (0);	947	poll_cb ();
1420	}	948	}
1421		949
1422	void	950	int
1423	poll()	951	poll()
1424	PROTOTYPE:	952	PROTOTYPE:
1425	CODE:	953	CODE:
1426	if (nreqs)
1427	{
1428	poll_wait ();	954	poll_wait ();
1429	poll_cb (0);	955	RETVAL = poll_cb ();
1430	}	956	OUTPUT:
		957	RETVAL
1431		958
1432	int	959	int
1433	poll_fileno()	960	poll_fileno()
1434	PROTOTYPE:	961	PROTOTYPE:
1435	CODE:	962	CODE:
…		…
1439		966
1440	int	967	int
1441	poll_cb(...)	968	poll_cb(...)
1442	PROTOTYPE:	969	PROTOTYPE:
1443	CODE:	970	CODE:
1444	RETVAL = poll_cb (0);	971	RETVAL = poll_cb ();
1445	OUTPUT:	972	OUTPUT:
1446	RETVAL	973	RETVAL
1447		974
1448	int
1449	poll_some(int max = 0)
1450	PROTOTYPE: $
1451	CODE:
1452	RETVAL = poll_cb (max);
1453	OUTPUT:
1454	RETVAL
1455
1456	void	975	void
1457	poll_wait()	976	poll_wait()
1458	PROTOTYPE:	977	PROTOTYPE:
1459	CODE:	978	CODE:
1460	if (nreqs)
1461	poll_wait ();	979	poll_wait ();
1462		980
1463	int	981	int
1464	nreqs()	982	nreqs()
1465	PROTOTYPE:	983	PROTOTYPE:
1466	CODE:	984	CODE:
1467	RETVAL = nreqs;	985	RETVAL = eio_nreqs ();
1468	OUTPUT:	986	OUTPUT:
1469	RETVAL	987	RETVAL
1470		988
		989	int
		990	nready()
		991	PROTOTYPE:
		992	CODE:
		993	RETVAL = eio_nready ();
		994	OUTPUT:
		995	RETVAL
		996
		997	int
		998	npending()
		999	PROTOTYPE:
		1000	CODE:
		1001	RETVAL = eio_npending ();
		1002	OUTPUT:
		1003	RETVAL
		1004
		1005	int
		1006	nthreads()
		1007	PROTOTYPE:
		1008	CODE:
		1009	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1010	RETVAL = started;
		1011	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	void _on_next_submit (SV *cb)
		1016	CODE:
		1017	SvREFCNT_dec (on_next_submit);
		1018	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1019
1471	PROTOTYPES: DISABLE	1020	PROTOTYPES: DISABLE
1472		1021
1473	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1022	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1474		1023
1475	void	1024	void
1476	cancel (aio_req_ornot req)	1025	cancel (aio_req_ornot req)
1477	CODE:	1026	CODE:
1478	req_cancel (req);	1027	eio_cancel (req);
1479		1028
1480	void	1029	void
1481	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1030	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1482	CODE:	1031	CODE:
1483	SvREFCNT_dec (req->callback);	1032	SvREFCNT_dec (req->callback);
…		…
1488	void	1037	void
1489	add (aio_req grp, ...)	1038	add (aio_req grp, ...)
1490	PPCODE:	1039	PPCODE:
1491	{	1040	{
1492	int i;	1041	int i;
1493	aio_req req;
1494		1042
1495	if (grp->fd == 2)	1043	if (grp->int1 == 2)
1496	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1044	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1497		1045
1498	for (i = 1; i < items; ++i )	1046	for (i = 1; i < items; ++i )
1499	{	1047	{
		1048	aio_req req;
		1049
1500	if (GIMME_V != G_VOID)	1050	if (GIMME_V != G_VOID)
1501	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1051	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1502		1052
1503	req = SvAIO_REQ (ST (i));	1053	req = SvAIO_REQ (ST (i));
1504		1054
1505	if (req)	1055	if (req)
1506	{	1056	eio_grp_add (grp, req);
1507	++grp->length;
1508	req->grp = grp;
1509
1510	req->grp_prev = 0;
1511	req->grp_next = grp->grp_first;
1512
1513	if (grp->grp_first)
1514	grp->grp_first->grp_prev = req;
1515
1516	grp->grp_first = req;
1517	}
1518	}	1057	}
1519	}	1058	}
1520		1059
1521	void	1060	void
1522	cancel_subs (aio_req_ornot req)	1061	cancel_subs (aio_req_ornot req)
…		…
1526	void	1065	void
1527	result (aio_req grp, ...)	1066	result (aio_req grp, ...)
1528	CODE:	1067	CODE:
1529	{	1068	{
1530	int i;	1069	int i;
		1070	AV *av;
		1071
		1072	grp->errorno = errno;
		1073
1531	AV *av = newAV ();	1074	av = newAV ();
1532		1075
1533	for (i = 1; i < items; ++i )	1076	for (i = 1; i < items; ++i )
1534	av_push (av, newSVsv (ST (i)));	1077	av_push (av, newSVsv (ST (i)));
1535		1078
1536	SvREFCNT_dec (grp->data);	1079	SvREFCNT_dec (grp->sv1);
1537	grp->data = (SV *)av;	1080	grp->sv1 = (SV *)av;
1538	}	1081	}
		1082
		1083	void
		1084	errno (aio_req grp, int errorno = errno)
		1085	CODE:
		1086	grp->errorno = errorno;
1539		1087
1540	void	1088	void
1541	limit (aio_req grp, int limit)	1089	limit (aio_req grp, int limit)
1542	CODE:	1090	CODE:
1543	grp->fd2 = limit;	1091	eio_grp_limit (grp, limit);
1544	aio_grp_feed (grp);
1545		1092
1546	void	1093	void
1547	feed (aio_req grp, SV *callback=&PL_sv_undef)	1094	feed (aio_req grp, SV *callback=&PL_sv_undef)
1548	CODE:	1095	CODE:
1549	{	1096	{
1550	SvREFCNT_dec (grp->fh2);	1097	SvREFCNT_dec (grp->sv2);
1551	grp->fh2 = newSVsv (callback);	1098	grp->sv2 = newSVsv (callback);
1552		1099
1553	if (grp->fd2 <= 0)	1100	if (grp->int2 <= 0)
1554	grp->fd2 = 2;	1101	grp->int2 = 2;
1555		1102
1556	aio_grp_feed (grp);	1103	eio_grp_limit (grp, grp->int2);
1557	}	1104	}
1558		1105

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