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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC vs.
Revision 1.119 by root, Sun May 11 19:11:05 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	#define EIO_STRUCT_STAT Stat_t
48	#ifndef NAME_MAX	71
49	# 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
50	#endif	77	#endif
51		78
52	#if __ia64	79	static HV *stash;
53	# define STACKSIZE 65536	80	typedef SV SV8; /* byte-sv, used for argument-checking */
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif
59
60	/* buffer size for various temporary buffers */
61	#define AIO_BUFSIZE 65536
62
63	#define dBUF \
64	char *aio_buf; \
65	LOCK (wrklock); \
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67	UNLOCK (wrklock); \
68	if (!aio_buf) \
69	return -1;
70
71	enum {
72	REQ_QUIT,
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};
84		81
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	82	#define AIO_REQ_KLASS "IO::AIO::REQ"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	83	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		84
88	typedef struct aio_cb	85	#define EIO_COMMON \
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;	86	SV *callback; \
93	SV *fh, *fh2;	87	SV *sv1, *sv2; \
94	void *dataptr, *data2ptr;
95	Stat_t *statdata;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99
100	STRLEN dataoffset;	88	STRLEN stroffset; \
101	int type;	89	SV *self
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105		90
106	unsigned char flags;	91	#include "libeio/eio.h"
107	unsigned char pri;
108		92
109	SV *self; /* the perl counterpart of this request, if any */	93	static int req_invoke (eio_req *req);
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	94	#define EIO_FINISH(req) req_invoke (req)
111	} 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)
112		99
113	enum {	100	enum {
114	FLAG_CANCELLED = 0x01,	101	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
115	};	102	};
116		103
		104	#include "libeio/eio.c"
		105
117	typedef aio_cb *aio_req;	106	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	107	typedef eio_req *aio_req_ornot;
119		108
120	enum {	109	static SV *on_next_submit;
121	PRI_MIN = -4,
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;	110	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
		111	static int max_outstanding;
130		112
131	static int started, wanted;	113	static int respipe_osf [2], respipe [2] = { -1, -1 };
132	static volatile int nreqs;
133	static int respipe [2];
134		114
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{
165	closedir (wrk->dirp);
166	wrk->dirp = 0;
167	}
168
169	if (wrk->dbuf)
170	{
171	free (wrk->dbuf);
172	wrk->dbuf = 0;
173	}
174	}
175
176	static void worker_free (worker *wrk)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;
223
224	--q->size;
225
226	for (pri = NUM_PRI; pri--; )
227	{
228	aio_req req = q->qs[pri];
229
230	if (req)
231	{
232	if (!(q->qs[pri] = req->next))
233	q->qe[pri] = 0;
234
235	return req;
236	}
237	}
238
239	abort ();
240	}
241
242	static int poll_cb ();
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	115	static void req_destroy (aio_req req);
245	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	}
246		131
247	/* must be called at most once */	132	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	133	static SV *req_sv (aio_req req, const char *klass)
249	{	134	{
250	if (!req->self)	135	if (!req->self)
…		…
268	return mg ? (aio_req)mg->mg_ptr : 0;	153	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	154	}
270		155
271	static void aio_grp_feed (aio_req grp)	156	static void aio_grp_feed (aio_req grp)
272	{	157	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	158	if (grp->sv2 && SvOK (grp->sv2))
274	{	159	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	160	dSP;
280		161
281	ENTER;	162	ENTER;
282	SAVETMPS;	163	SAVETMPS;
283	PUSHMARK (SP);	164	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	165	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285	PUTBACK;	166	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	167	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	168	SPAGAIN;
288	FREETMPS;	169	FREETMPS;
289	LEAVE;	170	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	171	}
300	}	172	}
301		173
302	static void aio_grp_dec (aio_req grp)	174	static void req_submit (eio_req *req)
303	{	175	{
304	--grp->length;	176	eio_submit (req);
305		177
306	/* call feeder, if applicable */	178	if (on_next_submit)
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	179	{
312	req_invoke (grp);	180	dSP;
313	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);
314	}	188	}
315	}	189	}
316		190
317	static void poll_wait ()	191	static int req_invoke (eio_req *req)
318	{	192	{
319	fd_set rfd;	193	dSP;
320		194
321	while (nreqs)	195	if (req->flags & FLAG_SV2_RO_OFF)
		196	SvREADONLY_off (req->sv2);
		197
		198	if (!EIO_CANCELLED (req) && SvOK (req->callback))
322	{	199	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;
345
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347	{
348	errno = req->errorno;
349
350	ENTER;	200	ENTER;
351	SAVETMPS;	201	SAVETMPS;
352	PUSHMARK (SP);	202	PUSHMARK (SP);
353	EXTEND (SP, 1);	203	EXTEND (SP, 1);
354		204
355	switch (req->type)	205	switch (req->type)
356	{	206	{
357	case REQ_READDIR:	207	case EIO_READDIR:
358	{	208	{
359	SV *rv = &PL_sv_undef;	209	SV *rv = &PL_sv_undef;
360		210
361	if (req->result >= 0)	211	if (req->result >= 0)
362	{	212	{
363	int i;	213	int i;
364	char *buf = req->data2ptr;	214	char *buf = req->ptr2;
365	AV *av = newAV ();	215	AV *av = newAV ();
366		216
367	av_extend (av, req->result - 1);	217	av_extend (av, req->result - 1);
368		218
369	for (i = 0; i < req->result; ++i)	219	for (i = 0; i < req->result; ++i)
…		…
379		229
380	PUSHs (rv);	230	PUSHs (rv);
381	}	231	}
382	break;	232	break;
383		233
384	case REQ_OPEN:	234	case EIO_OPEN:
385	{	235	{
386	/* convert fd to fh */	236	/* convert fd to fh */
387	SV *fh;	237	SV *fh = &PL_sv_undef;
388		238
389	PUSHs (sv_2mortal (newSViv (req->result)));	239	if (req->result >= 0)
390	PUTBACK;	240	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	241	GV *gv = (GV *)sv_newmortal ();
392	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);
393		248
394	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	);
395		256
		257	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		258	fh = (SV *)gv;
		259	}
		260
396	PUSHMARK (SP);	261	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	262	}
399	break;	263	break;
400		264
401	case REQ_GROUP:	265	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	266	req->int1 = 2; /* mark group as finished */
403		267
404	if (req->data)	268	if (req->sv1)
405	{	269	{
406	int i;	270	int i;
407	AV *av = (AV *)req->data;	271	AV *av = (AV *)req->sv1;
408		272
409	EXTEND (SP, AvFILL (av) + 1);	273	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	274	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	275	PUSHs (*av_fetch (av, i, 0));
412	}	276	}
413	break;	277	break;
414		278
415	case REQ_NOP:	279	case EIO_NOP:
416	case REQ_BUSY:	280	case EIO_BUSY:
417	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 */
418		307
419	default:	308	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	309	PUSHs (sv_2mortal (newSViv (req->result)));
421	break;	310	break;
422	}	311	}
423		312
		313	errno = req->errorno;
424		314
425	PUTBACK;	315	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	316	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	317	SPAGAIN;
428		318
429	FREETMPS;	319	FREETMPS;
430	LEAVE;	320	LEAVE;
		321
		322	PUTBACK;
431	}	323	}
432		324
433	if (req->grp)	325	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	326	}
453		327
454	static void req_free (aio_req req)	328	static void req_destroy (aio_req req)
455	{	329	{
456	if (req->self)	330	if (req->self)
457	{	331	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	332	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	333	SvREFCNT_dec (req->self);
460	}	334	}
461		335
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	336	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	337	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	338	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		339
471	Safefree (req);	340	Safefree (req);
472	}	341	}
473		342
474	static void req_cancel_subs (aio_req grp)	343	static void req_cancel_subs (aio_req grp)
475	{	344	{
476	aio_req sub;	345	aio_req sub;
477		346
478	if (grp->type != REQ_GROUP)	347	if (grp->type != EIO_GROUP)
479	return;	348	return;
480		349
481	SvREFCNT_dec (grp->fh2);	350	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	351	grp->sv2 = 0;
483		352
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	353	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	354	}
487		355
488	static void req_cancel (aio_req req)	356	#ifdef USE_SOCKETS_AS_HANDLES
489	{	357	# define TO_SOCKET(x) (win32_get_osfhandle (x))
490	req->flags |= FLAG_CANCELLED;	358	#else
		359	# define TO_SOCKET(x) (x)
		360	#endif
491		361
492	req_cancel_subs (req);	362	static void
493	}	363	create_respipe (void)
494
495	static int poll_cb ()
496	{	364	{
497	dSP;	365	int old_readfd = respipe [0];
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501		366
502	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)
503	{	378	{
504	LOCK (reslock);	379	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
505	req = reqq_shift (&res_queue);	380	croak ("unable to initialize result pipe(2)");
506		381
507	if (req)	382	respipe_close (respipe [0]);
508	{	383	respipe [0] = old_readfd;
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;
522
523	--nreqs;
524
525	if (req->type == REQ_QUIT)
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	384	}
554		385
555	return count;	386	#ifdef _WIN32
556	}	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)");
557		395
558	static void *aio_proc(void *arg);	396	respipe_osf [0] = TO_SOCKET (respipe [0]);
		397	respipe_osf [1] = TO_SOCKET (respipe [1]);
		398	}
559		399
560	static void start_thread (void)	400	static void poll_wait (void)
561	{	401	{
562	sigset_t fullsigset, oldsigset;	402	fd_set rfd;
563	pthread_attr_t attr;
564		403
565	worker *wrk = calloc (1, sizeof (worker));	404	while (eio_nreqs ())
566
567	if (!wrk)
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{	405	{
581	wrk->prev = &wrk_first;	406	int size;
582	wrk->next = wrk_first.next;	407
583	wrk_first.next->prev = wrk;	408	X_LOCK (reslock);
584	wrk_first.next = wrk;	409	size = res_queue.size;
585	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);
586	}	421	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}	422	}
593		423
594	static void req_send (aio_req req)	424	static int poll_cb (void)
595	{	425	{
596	while (started < wanted && nreqs >= started)	426	int res;
597	start_thread ();
598		427
599	++nreqs;	428	do
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606
607	static void end_thread (void)
608	{
609	aio_req req;
610
611	Newz (0, req, 1, aio_cb);
612
613	req->type = REQ_QUIT;
614	req->pri = PRI_MAX + PRI_BIAS;
615
616	req_send (req);
617	}
618
619	static void min_parallel (int nthreads)
620	{
621	if (wanted < nthreads)
622	wanted = nthreads;
623	}
624
625	static void max_parallel (int nthreads)
626	{
627	int cur = started;
628
629	if (wanted > nthreads)
630	wanted = nthreads;
631
632	while (cur > wanted)
633	{	429	{
634	end_thread ();	430	res = eio_poll ();
635	cur--;	431
		432	if (res > 0)
		433	croak (0);
636	}	434	}
637		435	while (max_outstanding && max_outstanding <= eio_nreqs ());
638	while (started > wanted)
639	{
640	poll_wait ();
641	poll_cb ();
642	}
643	}
644
645	static void create_pipe ()
646	{
647	if (pipe (respipe))
648	croak ("unable to initialize result pipe");
649
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
651	croak ("cannot set result pipe to nonblocking mode");
652
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
654	croak ("cannot set result pipe to nonblocking mode");
655	}
656
657	/*****************************************************************************/
658	/* work around various missing functions */
659
660	#if !HAVE_PREADWRITE
661	# define pread aio_pread
662	# define pwrite aio_pwrite
663
664	/*
665	* make our pread/pwrite safe against themselves, but not against
666	* normal read/write by using a mutex. slows down execution a lot,
667	* but that's your problem, not mine.
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
672	{
673	ssize_t res;
674	off_t ooffset;
675
676	LOCK (preadwritelock);
677	ooffset = lseek (fd, 0, SEEK_CUR);
678	lseek (fd, offset, SEEK_SET);
679	res = read (fd, buf, count);
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682		436
683	return res;	437	return res;
684	}	438	}
685		439
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
687	{
688	ssize_t res;
689	off_t ooffset;
690
691	LOCK (preadwritelock);
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697
698	return res;
699	}
700	#endif
701
702	#if !HAVE_FDATASYNC
703	# define fdatasync fsync
704	#endif
705
706	#if !HAVE_READAHEAD
707	# define readahead aio_readahead
708
709	static ssize_t readahead (int fd, off_t offset, size_t count)
710	{
711	dBUF;
712
713	while (count > 0)
714	{
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
716
717	pread (fd, aio_buf, len, offset);
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}
781
782	# elif __hpux
783	res = sendfile (ofd, ifd, offset, count, 0, 0);
784
785	# elif __solaris
786	{
787	struct sendfilevec vec;
788	size_t sbytes;
789
790	vec.sfv_fd = ifd;
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794
795	res = sendfilev (ofd, &vec, 1, &sbytes);
796
797	if (res < 0 && sbytes)
798	res = sbytes;
799	}
800
801	# endif
802	#else
803	res = -1;
804	errno = ENOSYS;
805	#endif
806
807	if (res < 0
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817
818	res = 0;
819
820	while (count)
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826	if (cnt <= 0)
827	{
828	if (cnt && !res) res = -1;
829	break;
830	}
831
832	cnt = write (ofd, aio_buf, cnt);
833
834	if (cnt <= 0)
835	{
836	if (cnt && !res) res = -1;
837	break;
838	}
839
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;
847	}
848
849	/* read a full directory */
850	static void scandir_ (aio_req req, worker *self)
851	{
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}
903	}
904
905	if (errno)
906	res = -1;
907
908	req->result = res;
909	}
910
911	/*****************************************************************************/
912
913	static void *aio_proc (void *thr_arg)
914	{
915	aio_req req;
916	int type;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}
1004
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)	440	static void atfork_child (void)
1034	{	441	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();	442	create_respipe ();
1060
1061	atfork_parent ();
1062	}	443	}
1063		444
1064	#define dREQ \	445	#define dREQ \
1065	aio_req req; \	446	aio_req req; \
1066	int req_pri = next_pri; \	447	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \	448	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1068	\	449	\
1069	if (SvOK (callback) && !SvROK (callback)) \	450	if (SvOK (callback) && !SvROK (callback)) \
1070	croak ("callback must be undef or of reference type"); \	451	croak ("callback must be undef or of reference type"); \
1071	\	452	\
1072	Newz (0, req, 1, aio_cb); \	453	Newz (0, req, 1, eio_req); \
1073	if (!req) \	454	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \	455	croak ("out of memory during eio_req allocation"); \
1075	\	456	\
1076	req->callback = newSVsv (callback); \	457	req->callback = newSVsv (callback); \
1077	req->pri = req_pri	458	req->pri = req_pri
1078		459
1079	#define REQ_SEND \	460	#define REQ_SEND \
1080	req_send (req); \	461	req_submit (req); \
1081	\	462	\
1082	if (GIMME_V != G_VOID) \	463	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));	464	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084		465
1085	MODULE = IO::AIO PACKAGE = IO::AIO	466	MODULE = IO::AIO PACKAGE = IO::AIO
1086		467
1087	PROTOTYPES: ENABLE	468	PROTOTYPES: ENABLE
1088		469
1089	BOOT:	470	BOOT:
1090	{	471	{
1091	HV *stash = gv_stashpv ("IO::AIO", 1);	472	stash = gv_stashpv ("IO::AIO", 1);
		473
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	474	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	475	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094	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);
1095		486
1096	create_pipe ();	487	X_COND_CHECK (reqwait);
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	488	#else
1098	}	489	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		490	#endif
1099		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);
		499	}
		500
1100	void	501	void
1101	min_parallel (nthreads)	502	max_poll_reqs (int nreqs)
1102	int nthreads
1103	PROTOTYPE: $	503	PROTOTYPE: $
		504	CODE:
		505	eio_set_max_poll_reqs (nreqs);
1104		506
1105	void	507	void
1106	max_parallel (nthreads)	508	max_poll_time (double nseconds)
1107	int nthreads
1108	PROTOTYPE: $	509	PROTOTYPE: $
		510	CODE:
		511	eio_set_max_poll_time (nseconds);
1109		512
1110	void	513	void
		514	min_parallel (int nthreads)
		515	PROTOTYPE: $
		516	CODE:
		517	eio_set_min_parallel (nthreads);
		518
		519	void
		520	max_parallel (int nthreads)
		521	PROTOTYPE: $
		522	CODE:
		523	eio_set_max_parallel (nthreads);
		524
		525	void
		526	max_idle (int nthreads)
		527	PROTOTYPE: $
		528	CODE:
		529	eio_set_max_idle (nthreads);
		530
		531	void
		532	max_outstanding (int maxreqs)
		533	PROTOTYPE: $
		534	CODE:
		535	max_outstanding = maxreqs;
		536
		537	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	538	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$	539	PROTOTYPE: $$$;$
1117	PPCODE:	540	PPCODE:
1118	{	541	{
1119	dREQ;	542	dREQ;
1120		543
1121	req->type = REQ_OPEN;	544	req->type = EIO_OPEN;
1122	req->data = newSVsv (pathname);	545	req->sv1 = newSVsv (pathname);
1123	req->dataptr = SvPVbyte_nolen (req->data);	546	req->ptr1 = SvPVbyte_nolen (req->sv1);
1124	req->fd = flags;	547	req->int1 = flags;
1125	req->mode = mode;	548	req->int2 = mode;
1126		549
1127	REQ_SEND;	550	REQ_SEND;
1128	}	551	}
1129		552
1130	void	553	void
1131	aio_close (fh,callback=&PL_sv_undef)	554	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$	555	PROTOTYPE: $;$
1135	ALIAS:	556	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC	557	aio_fsync = EIO_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC	558	aio_fdatasync = EIO_FDATASYNC
1139	PPCODE:	559	PPCODE:
1140	{	560	{
1141	dREQ;	561	dREQ;
1142		562
1143	req->type = ix;	563	req->type = ix;
1144	req->fh = newSVsv (fh);	564	req->sv1 = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	565	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146		566
1147	REQ_SEND (req);	567	REQ_SEND (req);
1148	}	568	}
1149		569
1150	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
1151	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)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:	600	ALIAS:
1159	aio_read = REQ_READ	601	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	602	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$	603	PROTOTYPE: $$$$$;$
1162	PPCODE:	604	PPCODE:
1163	{	605	{
1164	aio_req req;
1165	STRLEN svlen;	606	STRLEN svlen;
1166	char *svptr = SvPVbyte (data, svlen);	607	char *svptr = SvPVbyte (data, svlen);
		608	UV len = SvUV (length);
1167		609
1168	SvUPGRADE (data, SVt_PV);	610	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);	611	SvPOK_on (data);
1170		612
1171	if (dataoffset < 0)	613	if (dataoffset < 0)
1172	dataoffset += svlen;	614	dataoffset += svlen;
1173		615
1174	if (dataoffset < 0 || dataoffset > svlen)	616	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	617	croak ("dataoffset outside of data scalar");
1176		618
1177	if (ix == REQ_WRITE)	619	if (ix == EIO_WRITE)
1178	{	620	{
1179	/* write: check length and adjust. */	621	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	622	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	623	len = svlen - dataoffset;
1182	}	624	}
1183	else	625	else
1184	{	626	{
1185	/* read: grow scalar as necessary */	627	/* read: grow scalar as necessary */
1186	svptr = SvGROW (data, length + dataoffset);	628	svptr = SvGROW (data, len + dataoffset + 1);
1187	}	629	}
1188		630
1189	if (length < 0)	631	if (len < 0)
1190	croak ("length must not be negative");	632	croak ("length must not be negative");
1191		633
1192	{	634	{
1193	dREQ;	635	dREQ;
1194		636
1195	req->type = ix;	637	req->type = ix;
1196	req->fh = newSVsv (fh);	638	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	639	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1198	: IoOFP (sv_2io (fh)));	640	: IoOFP (sv_2io (fh)));
		641	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	642	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	643	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	644	req->ptr2 = (char *)svptr + dataoffset;
		645	req->stroffset = dataoffset;
1203		646
1204	if (!SvREADONLY (data))	647	if (!SvREADONLY (data))
1205	{	648	{
1206	SvREADONLY_on (data);	649	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	650	req->flags |= FLAG_SV2_RO_OFF;
1208	}	651	}
1209		652
1210	REQ_SEND;	653	REQ_SEND;
1211	}	654	}
1212	}	655	}
1213		656
1214	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
1215	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)
1216	SV * out_fh
1217	SV * in_fh
1218	UV in_offset
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$	674	PROTOTYPE: $$$$;$
1222	PPCODE:	675	PPCODE:
1223	{	676	{
1224	dREQ;	677	dREQ;
1225		678
1226	req->type = REQ_SENDFILE;	679	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	680	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	681	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1229	req->fh2 = newSVsv (in_fh);	682	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	683	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1231	req->offset = in_offset;	684	req->offs = SvVAL64 (in_offset);
1232	req->length = length;	685	req->size = length;
1233		686
1234	REQ_SEND;	687	REQ_SEND;
1235	}	688	}
1236		689
1237	void	690	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	691	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$	692	PROTOTYPE: $$$;$
1244	PPCODE:	693	PPCODE:
1245	{	694	{
1246	dREQ;	695	dREQ;
1247		696
1248	req->type = REQ_READAHEAD;	697	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	698	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	699	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1251	req->offset = offset;	700	req->offs = SvVAL64 (offset);
1252	req->length = length;	701	req->size = length;
1253		702
1254	REQ_SEND;	703	REQ_SEND;
1255	}	704	}
1256		705
1257	void	706	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	707	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	708	ALIAS:
1262	aio_stat = REQ_STAT	709	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	710	aio_lstat = EIO_LSTAT
1264	PPCODE:	711	PPCODE:
1265	{	712	{
1266	dREQ;	713	dREQ;
1267		714
1268	New (0, req->statdata, 1, Stat_t);	715	req->sv1 = newSVsv (fh_or_path);
1269	if (!req->statdata)
1270	{
1271	req_free (req);
1272	croak ("out of memory during aio_req->statdata allocation");
1273	}
1274		716
1275	if (SvPOK (fh_or_path))	717	if (SvPOK (req->sv1))
1276	{	718	{
1277	req->type = ix;	719	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);	720	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280	}	721	}
1281	else	722	else
1282	{	723	{
1283	req->type = REQ_FSTAT;	724	req->type = EIO_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	725	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}	726	}
1287		727
1288	REQ_SEND;	728	REQ_SEND;
1289	}	729	}
1290		730
1291	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 = EIO_FCHMOD;
		793	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		794	}
		795	else
		796	{
		797	req->type = ix;
		798	req->ptr1 = SvPVbyte_nolen (req->sv1);
		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
1292	aio_unlink (pathname,callback=&PL_sv_undef)	829	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	830	ALIAS:
1296	aio_unlink = REQ_UNLINK	831	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	832	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	833	aio_readdir = EIO_READDIR
1299	PPCODE:	834	PPCODE:
1300	{	835	{
1301	dREQ;	836	dREQ;
1302		837
1303	req->type = ix;	838	req->type = ix;
1304	req->data = newSVsv (pathname);	839	req->sv1 = newSVsv (pathname);
1305	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);
1306		860
1307	REQ_SEND;	861	REQ_SEND;
1308	}	862	}
1309		863
1310	void	864	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	865	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:
1316	aio_link = REQ_LINK
1317	aio_symlink = REQ_SYMLINK
1318	aio_rename = REQ_RENAME
1319	PPCODE:	866	PPCODE:
1320	{	867	{
1321	dREQ;	868	dREQ;
1322		869
1323	req->type = ix;	870	req->type = EIO_MKNOD;
1324	req->fh = newSVsv (oldpath);	871	req->sv1 = newSVsv (pathname);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->data = newSVsv (newpath);	873	req->int2 = (mode_t)mode;
1327	req->dataptr = SvPVbyte_nolen (req->data);	874	req->offs = dev;
1328		875
1329	REQ_SEND;	876	REQ_SEND;
1330	}	877	}
1331		878
1332	void	879	void
1333	aio_busy (delay,callback=&PL_sv_undef)	880	aio_busy (double delay, SV *callback=&PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	881	PPCODE:
1337	{	882	{
1338	dREQ;	883	dREQ;
1339		884
1340	req->type = REQ_BUSY;	885	req->type = EIO_BUSY;
1341	req->fd = delay < 0. ? 0 : delay;	886	req->nv1 = delay < 0. ? 0. : delay;
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1343		887
1344	REQ_SEND;	888	REQ_SEND;
1345	}	889	}
1346		890
1347	void	891	void
1348	aio_group (callback=&PL_sv_undef)	892	aio_group (SV *callback=&PL_sv_undef)
1349	SV * callback
1350	PROTOTYPE: ;$	893	PROTOTYPE: ;$
1351	PPCODE:	894	PPCODE:
1352	{	895	{
1353	dREQ;	896	dREQ;
1354		897
1355	req->type = REQ_GROUP;	898	req->type = EIO_GROUP;
		899
1356	req_send (req);	900	eio_submit (req);
1357
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	901	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1359	}	902	}
1360		903
1361	void	904	void
1362	aio_nop (callback=&PL_sv_undef)	905	aio_nop (SV *callback=&PL_sv_undef)
1363	SV * callback	906	ALIAS:
		907	aio_nop = EIO_NOP
		908	aio_sync = EIO_SYNC
1364	PPCODE:	909	PPCODE:
1365	{	910	{
1366	dREQ;	911	dREQ;
1367		912
1368	req->type = REQ_NOP;	913	req->type = ix;
1369		914
1370	REQ_SEND;	915	REQ_SEND;
1371	}	916	}
1372		917
1373	void	918	int
1374	aioreq_pri (int pri = DEFAULT_PRI)	919	aioreq_pri (int pri = 0)
1375	CODE:	920	PROTOTYPE: ;$
		921	CODE:
		922	RETVAL = next_pri - EIO_PRI_BIAS;
		923	if (items > 0)
		924	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	925	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	926	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	927	next_pri = pri + EIO_PRI_BIAS;
		928	}
		929	OUTPUT:
		930	RETVAL
1379		931
1380	void	932	void
1381	aioreq_nice (int nice = 0)	933	aioreq_nice (int nice = 0)
1382	CODE:	934	CODE:
1383	nice = next_pri - nice;	935	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	936	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	937	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	938	next_pri = nice + EIO_PRI_BIAS;
1387		939
1388	void	940	void
1389	flush ()	941	flush ()
1390	PROTOTYPE:	942	PROTOTYPE:
1391	CODE:	943	CODE:
1392	while (nreqs)	944	while (eio_nreqs ())
1393	{	945	{
1394	poll_wait ();	946	poll_wait ();
1395	poll_cb ();	947	poll_cb ();
1396	}	948	}
1397		949
1398	void	950	int
1399	poll()	951	poll()
1400	PROTOTYPE:	952	PROTOTYPE:
1401	CODE:	953	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	954	poll_wait ();
1405	poll_cb ();	955	RETVAL = poll_cb ();
1406	}	956	OUTPUT:
		957	RETVAL
1407		958
1408	int	959	int
1409	poll_fileno()	960	poll_fileno()
1410	PROTOTYPE:	961	PROTOTYPE:
1411	CODE:	962	CODE:
…		…
1423		974
1424	void	975	void
1425	poll_wait()	976	poll_wait()
1426	PROTOTYPE:	977	PROTOTYPE:
1427	CODE:	978	CODE:
1428	if (nreqs)
1429	poll_wait ();	979	poll_wait ();
1430		980
1431	int	981	int
1432	nreqs()	982	nreqs()
1433	PROTOTYPE:	983	PROTOTYPE:
1434	CODE:	984	CODE:
1435	RETVAL = nreqs;	985	RETVAL = eio_nreqs ();
1436	OUTPUT:	986	OUTPUT:
1437	RETVAL	987	RETVAL
1438		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
1439	PROTOTYPES: DISABLE	1020	PROTOTYPES: DISABLE
1440		1021
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1022	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1023
1443	void	1024	void
1444	cancel (aio_req_ornot req)	1025	cancel (aio_req_ornot req)
1445	CODE:	1026	CODE:
1446	req_cancel (req);	1027	eio_cancel (req);
1447		1028
1448	void	1029	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1030	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450	CODE:	1031	CODE:
1451	SvREFCNT_dec (req->callback);	1032	SvREFCNT_dec (req->callback);
…		…
1456	void	1037	void
1457	add (aio_req grp, ...)	1038	add (aio_req grp, ...)
1458	PPCODE:	1039	PPCODE:
1459	{	1040	{
1460	int i;	1041	int i;
1461	aio_req req;
1462		1042
1463	if (grp->fd == 2)	1043	if (grp->int1 == 2)
1464	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");
1465		1045
1466	for (i = 1; i < items; ++i )	1046	for (i = 1; i < items; ++i )
1467	{	1047	{
		1048	aio_req req;
		1049
1468	if (GIMME_V != G_VOID)	1050	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1051	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1052
1471	req = SvAIO_REQ (ST (i));	1053	req = SvAIO_REQ (ST (i));
1472		1054
1473	if (req)	1055	if (req)
1474	{	1056	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	1057	}
1487	}	1058	}
1488		1059
1489	void	1060	void
1490	cancel_subs (aio_req_ornot req)	1061	cancel_subs (aio_req_ornot req)
…		…
1494	void	1065	void
1495	result (aio_req grp, ...)	1066	result (aio_req grp, ...)
1496	CODE:	1067	CODE:
1497	{	1068	{
1498	int i;	1069	int i;
		1070	AV *av;
		1071
		1072	grp->errorno = errno;
		1073
1499	AV *av = newAV ();	1074	av = newAV ();
1500		1075
1501	for (i = 1; i < items; ++i )	1076	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	1077	av_push (av, newSVsv (ST (i)));
1503		1078
1504	SvREFCNT_dec (grp->data);	1079	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	1080	grp->sv1 = (SV *)av;
1506	}	1081	}
		1082
		1083	void
		1084	errno (aio_req grp, int errorno = errno)
		1085	CODE:
		1086	grp->errorno = errorno;
1507		1087
1508	void	1088	void
1509	limit (aio_req grp, int limit)	1089	limit (aio_req grp, int limit)
1510	CODE:	1090	CODE:
1511	grp->fd2 = limit;	1091	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		1092
1514	void	1093	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	1094	feed (aio_req grp, SV *callback=&PL_sv_undef)
1516	CODE:	1095	CODE:
1517	{	1096	{
1518	SvREFCNT_dec (grp->fh2);	1097	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	1098	grp->sv2 = newSVsv (callback);
1520		1099
1521	if (grp->fd2 <= 0)	1100	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	1101	grp->int2 = 2;
1523		1102
1524	aio_grp_feed (grp);	1103	eio_grp_limit (grp, grp->int2);
1525	}	1104	}
1526		1105

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