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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.73 by root, Tue Oct 24 21:26:30 2006 UTC vs.
Revision 1.125 by root, Thu Jun 19 09:05:43 2008 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"
17
18	#include <pthread.h>
19
20	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
21	#include <errno.h>	11	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	12	#include <sys/types.h>
25	#include <sys/stat.h>	13	#include <sys/stat.h>
26	#include <limits.h>	14	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	15	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	16	#include <sched.h>
31		17
32	#if HAVE_SENDFILE	18	/* perl namespace pollution */
33	# if __linux	19	#undef VERSION
34	# include <sys/sendfile.h>	20
35	# elif __freebsd	21	#ifdef _WIN32
36	# include <sys/socket.h>	22
37	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
38	# elif __hpux	24	# undef malloc
39	# include <sys/socket.h>	25	# undef free
40	# elif __solaris /* not yet */	26
41	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
42	# else	59	#else
43	# error sendfile support requested but not available	60
44	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
45	#endif	68	#endif
46		69
47	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
48	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
49	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
50	#endif	83	#endif
51		84
52	#if __ia64	85	static HV *stash;
53	# define STACKSIZE 65536	86	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		87
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	88	#define AIO_REQ_KLASS "IO::AIO::REQ"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	89	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		90
88	typedef struct aio_cb	91	#define EIO_REQ_MEMBERS \
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;	92	SV *callback; \
93	SV *fh, *fh2;	93	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;	94	STRLEN stroffset; \
101	int type;	95	SV *self;
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105		96
106	unsigned char flags;	97	#define EIO_NO_WRAPPERS 1
107	unsigned char pri;
108		98
109	SV *self; /* the perl counterpart of this request, if any */	99	#include "libeio/eio.h"
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	100
111	} aio_cb;	101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
112		107
113	enum {	108	enum {
114	FLAG_CANCELLED = 0x01,	109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
115	};	110	};
116		111
		112	#include "libeio/eio.c"
		113
117	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	115	typedef eio_req *aio_req_ornot;
119		116
120	enum {	117	static SV *on_next_submit;
121	PRI_MIN = -4,	118	static int next_pri = EIO_PRI_DEFAULT;
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;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int max_outstanding = 1<<30;	119	static int max_outstanding;
134	static int respipe [2];
135		120
136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138	#else
139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140	#endif
141		122
142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145	/* worker threasd management */
146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148	typedef struct worker {
149	/* locked by wrklock */
150	struct worker *prev, *next;
151
152	pthread_t tid;
153
154	/* locked by reslock, reqlock or wrklock */
155	aio_req req; /* currently processed request */
156	void *dbuf;
157	DIR *dirp;
158	} worker;
159
160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162	static void worker_clear (worker *wrk)
163	{
164	if (wrk->dirp)
165	{
166	closedir (wrk->dirp);
167	wrk->dirp = 0;
168	}
169
170	if (wrk->dbuf)
171	{
172	free (wrk->dbuf);
173	wrk->dbuf = 0;
174	}
175	}
176
177	static void worker_free (worker *wrk)
178	{
179	wrk->next->prev = wrk->prev;
180	wrk->prev->next = wrk->next;
181
182	free (wrk);
183	}
184
185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
188
189	/*
190	* a somewhat faster data structure might be nice, but
191	* with 8 priorities this actually needs <20 insns
192	* per shift, the most expensive operation.
193	*/
194	typedef struct {
195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196	int size;
197	} reqq;
198
199	static reqq req_queue;
200	static reqq res_queue;
201
202	int reqq_push (reqq *q, aio_req req)
203	{
204	int pri = req->pri;
205	req->next = 0;
206
207	if (q->qe[pri])
208	{
209	q->qe[pri]->next = req;
210	q->qe[pri] = req;
211	}
212	else
213	q->qe[pri] = q->qs[pri] = req;
214
215	return q->size++;
216	}
217
218	aio_req reqq_shift (reqq *q)
219	{
220	int pri;
221
222	if (!q->size)
223	return 0;
224
225	--q->size;
226
227	for (pri = NUM_PRI; pri--; )
228	{
229	aio_req req = q->qs[pri];
230
231	if (req)
232	{
233	if (!(q->qs[pri] = req->next))
234	q->qe[pri] = 0;
235
236	return req;
237	}
238	}
239
240	abort ();
241	}
242
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	123	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	124	static void req_cancel (aio_req req);
		125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
246		139
247	/* must be called at most once */	140	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
249	{	142	{
250	if (!req->self)	143	if (!req->self)
…		…
268	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	162	}
270		163
271	static void aio_grp_feed (aio_req grp)	164	static void aio_grp_feed (aio_req grp)
272	{	165	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	166	if (grp->sv2 && SvOK (grp->sv2))
274	{	167	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	168	dSP;
280		169
281	ENTER;	170	ENTER;
282	SAVETMPS;	171	SAVETMPS;
283	PUSHMARK (SP);	172	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285	PUTBACK;	174	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	176	SPAGAIN;
288	FREETMPS;	177	FREETMPS;
289	LEAVE;	178	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	}	179	}
300	}	180	}
301		181
302	static void aio_grp_dec (aio_req grp)	182	static void req_submit (eio_req *req)
303	{	183	{
304	--grp->length;	184	eio_submit (req);
305		185
306	/* call feeder, if applicable */	186	if (on_next_submit)
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	187	{
312	req_invoke (grp);	188	dSP;
313	req_free (grp);	189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
314	}	196	}
315	}	197	}
316		198
317	static void poll_wait ()	199	static int req_invoke (eio_req *req)
318	{	200	{
319	fd_set rfd;	201	dSP;
320		202
321	while (nreqs)	203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
		206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
322	{	207	{
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;	208	ENTER;
351	SAVETMPS;	209	SAVETMPS;
352	PUSHMARK (SP);	210	PUSHMARK (SP);
353	EXTEND (SP, 1);	211	EXTEND (SP, 1);
354		212
355	switch (req->type)	213	switch (req->type)
356	{	214	{
357	case REQ_READDIR:	215	case EIO_READDIR:
358	{	216	{
359	SV *rv = &PL_sv_undef;	217	SV *rv = &PL_sv_undef;
360		218
361	if (req->result >= 0)	219	if (req->result >= 0)
362	{	220	{
363	int i;	221	int i;
364	char *buf = req->data2ptr;	222	char *buf = req->ptr2;
365	AV *av = newAV ();	223	AV *av = newAV ();
366		224
367	av_extend (av, req->result - 1);	225	av_extend (av, req->result - 1);
368		226
369	for (i = 0; i < req->result; ++i)	227	for (i = 0; i < req->result; ++i)
…		…
379		237
380	PUSHs (rv);	238	PUSHs (rv);
381	}	239	}
382	break;	240	break;
383		241
384	case REQ_OPEN:	242	case EIO_OPEN:
385	{	243	{
386	/* convert fd to fh */	244	/* convert fd to fh */
387	SV *fh;	245	SV *fh = &PL_sv_undef;
388		246
389	PUSHs (sv_2mortal (newSViv (req->result)));	247	if (req->result >= 0)
390	PUTBACK;	248	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	249	GV *gv = (GV *)sv_newmortal ();
392	SPAGAIN;	250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
393		256
394	fh = SvREFCNT_inc (POPs);	257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
395		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
396	PUSHMARK (SP);	269	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	270	}
399	break;	271	break;
400		272
401	case REQ_GROUP:	273	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	274	req->int1 = 2; /* mark group as finished */
403		275
404	if (req->data)	276	if (req->sv1)
405	{	277	{
406	int i;	278	int i;
407	AV *av = (AV *)req->data;	279	AV *av = (AV *)req->sv1;
408		280
409	EXTEND (SP, AvFILL (av) + 1);	281	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	282	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	283	PUSHs (*av_fetch (av, i, 0));
412	}	284	}
413	break;	285	break;
414		286
415	case REQ_NOP:	287	case EIO_NOP:
416	case REQ_BUSY:	288	case EIO_BUSY:
417	break;	289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
418		315
419	default:	316	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	317	PUSHs (sv_2mortal (newSViv (req->result)));
421	break;	318	break;
422	}	319	}
423		320
		321	errno = req->errorno;
424		322
425	PUTBACK;	323	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	325	SPAGAIN;
428		326
429	FREETMPS;	327	FREETMPS;
430	LEAVE;	328	LEAVE;
		329
		330	PUTBACK;
431	}	331	}
432		332
433	if (req->grp)	333	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	}	334	}
453		335
454	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
455	{	337	{
456	if (req->self)	338	if (req->self)
457	{	339	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
460	}	342	}
461		343
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		347
471	Safefree (req);	348	Safefree (req);
472	}	349	}
473		350
474	static void req_cancel_subs (aio_req grp)	351	static void req_cancel_subs (aio_req grp)
475	{	352	{
476	aio_req sub;	353	aio_req sub;
477		354
478	if (grp->type != REQ_GROUP)	355	if (grp->type != EIO_GROUP)
479	return;	356	return;
480		357
481	SvREFCNT_dec (grp->fh2);	358	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	359	grp->sv2 = 0;
483		360
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	361	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	362	}
487		363
488	static void req_cancel (aio_req req)	364	#ifdef USE_SOCKETS_AS_HANDLES
489	{	365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
490	req->flags |= FLAG_CANCELLED;	366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
491		369
492	req_cancel_subs (req);	370	static void
493	}	371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
494		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
		386	{
		387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
		389
		390	respipe_close (respipe [0]);
		391	respipe [0] = old_readfd;
		392	}
		393
		394	#ifdef _WIN32
		395	int arg = 1;
		396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		398	#else
		399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
495	static int poll_cb ()	432	static int poll_cb (void)
496	{	433	{
497	dSP;
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501
502	for (;;)	434	for (;;)
503	{	435	{
504	LOCK (reslock);	436	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		437
507	if (req)	438	if (res > 0)
508	{
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;	439	croak (0);
522		440
523	--nreqs;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
524		443
525	if (req->type == REQ_QUIT)	444	poll_wait ();
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	}	445	}
554
555	return count;
556	}
557
558	static void *aio_proc(void *arg);
559
560	static void start_thread (void)
561	{
562	sigset_t fullsigset, oldsigset;
563	pthread_attr_t attr;
564
565	worker *wrk = calloc (1, sizeof (worker));
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	{
581	wrk->prev = &wrk_first;
582	wrk->next = wrk_first.next;
583	wrk_first.next->prev = wrk;
584	wrk_first.next = wrk;
585	started++;
586	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}
593
594	static void req_send (aio_req req)
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598
599	++nreqs;
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605
606	if (nreqs > max_outstanding)
607	for (;;)
608	{
609	poll_cb ();
610
611	if (nreqs <= max_outstanding)
612	break;
613
614	poll_wait ();
615	}
616	}
617
618	static void end_thread (void)
619	{
620	aio_req req;
621
622	Newz (0, req, 1, aio_cb);
623
624	req->type = REQ_QUIT;
625	req->pri = PRI_MAX + PRI_BIAS;
626
627	req_send (req);
628	}
629
630	static void min_parallel (int nthreads)
631	{
632	if (wanted < nthreads)
633	wanted = nthreads;
634	}
635
636	static void max_parallel (int nthreads)
637	{
638	int cur = started;
639
640	if (wanted > nthreads)
641	wanted = nthreads;
642
643	while (cur > wanted)
644	{
645	end_thread ();
646	cur--;
647	}
648
649	while (started > wanted)
650	{
651	poll_wait ();
652	poll_cb ();
653	}
654	}
655
656	static void create_pipe ()
657	{
658	if (pipe (respipe))
659	croak ("unable to initialize result pipe");
660
661	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
662	croak ("cannot set result pipe to nonblocking mode");
663
664	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
665	croak ("cannot set result pipe to nonblocking mode");
666	}
667
668	/*****************************************************************************/
669	/* work around various missing functions */
670
671	#if !HAVE_PREADWRITE
672	# define pread aio_pread
673	# define pwrite aio_pwrite
674
675	/*
676	* make our pread/pwrite safe against themselves, but not against
677	* normal read/write by using a mutex. slows down execution a lot,
678	* but that's your problem, not mine.
679	*/
680	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
681
682	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
683	{
684	ssize_t res;
685	off_t ooffset;
686
687	LOCK (preadwritelock);
688	ooffset = lseek (fd, 0, SEEK_CUR);
689	lseek (fd, offset, SEEK_SET);
690	res = read (fd, buf, count);
691	lseek (fd, ooffset, SEEK_SET);
692	UNLOCK (preadwritelock);
693
694	return res;
695	}
696
697	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
698	{
699	ssize_t res;
700	off_t ooffset;
701
702	LOCK (preadwritelock);
703	ooffset = lseek (fd, 0, SEEK_CUR);
704	lseek (fd, offset, SEEK_SET);
705	res = write (fd, buf, count);
706	lseek (fd, offset, SEEK_SET);
707	UNLOCK (preadwritelock);
708
709	return res;
710	}
711	#endif
712
713	#if !HAVE_FDATASYNC
714	# define fdatasync fsync
715	#endif
716
717	#if !HAVE_READAHEAD
718	# define readahead aio_readahead
719
720	static ssize_t readahead (int fd, off_t offset, size_t count)
721	{
722	dBUF;
723
724	while (count > 0)
725	{
726	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
727
728	pread (fd, aio_buf, len, offset);
729	offset += len;
730	count -= len;
731	}
732
733	errno = 0;
734	}
735	#endif
736
737	#if !HAVE_READDIR_R
738	# define readdir_r aio_readdir_r
739
740	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
741
742	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
743	{
744	struct dirent *e;
745	int errorno;
746
747	LOCK (readdirlock);
748
749	e = readdir (dirp);
750	errorno = errno;
751
752	if (e)
753	{
754	*res = ent;
755	strcpy (ent->d_name, e->d_name);
756	}
757	else
758	*res = 0;
759
760	UNLOCK (readdirlock);
761
762	errno = errorno;
763	return e ? 0 : -1;
764	}
765	#endif
766
767	/* sendfile always needs emulation */
768	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
769	{
770	ssize_t res;
771
772	if (!count)
773	return 0;
774
775	#if HAVE_SENDFILE
776	# if __linux
777	res = sendfile (ofd, ifd, &offset, count);
778
779	# elif __freebsd
780	/*
781	* Of course, the freebsd sendfile is a dire hack with no thoughts
782	* wasted on making it similar to other I/O functions.
783	*/
784	{
785	off_t sbytes;
786	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
787
788	if (res < 0 && sbytes)
789	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
790	res = sbytes;
791	}
792
793	# elif __hpux
794	res = sendfile (ofd, ifd, offset, count, 0, 0);
795
796	# elif __solaris
797	{
798	struct sendfilevec vec;
799	size_t sbytes;
800
801	vec.sfv_fd = ifd;
802	vec.sfv_flag = 0;
803	vec.sfv_off = offset;
804	vec.sfv_len = count;
805
806	res = sendfilev (ofd, &vec, 1, &sbytes);
807
808	if (res < 0 && sbytes)
809	res = sbytes;
810	}
811
812	# endif
813	#else
814	res = -1;
815	errno = ENOSYS;
816	#endif
817
818	if (res < 0
819	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
820	#if __solaris
821	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
822	#endif
823	)
824	)
825	{
826	/* emulate sendfile. this is a major pain in the ass */
827	dBUF;
828
829	res = 0;
830
831	while (count)
832	{
833	ssize_t cnt;
834
835	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
836
837	if (cnt <= 0)
838	{
839	if (cnt && !res) res = -1;
840	break;
841	}
842
843	cnt = write (ofd, aio_buf, cnt);
844
845	if (cnt <= 0)
846	{
847	if (cnt && !res) res = -1;
848	break;
849	}
850
851	offset += cnt;
852	res += cnt;
853	count -= cnt;
854	}
855	}
856
857	return res;
858	}
859
860	/* read a full directory */
861	static void scandir_ (aio_req req, worker *self)
862	{
863	DIR *dirp;
864	union
865	{
866	struct dirent d;
867	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
868	} *u;
869	struct dirent *entp;
870	char *name, *names;
871	int memlen = 4096;
872	int memofs = 0;
873	int res = 0;
874	int errorno;
875
876	LOCK (wrklock);
877	self->dirp = dirp = opendir (req->dataptr);
878	self->dbuf = u = malloc (sizeof (*u));
879	UNLOCK (wrklock);
880
881	req->data2ptr = names = malloc (memlen);
882
883	if (dirp && u && names)
884	for (;;)
885	{
886	errno = 0;
887	readdir_r (dirp, &u->d, &entp);
888
889	if (!entp)
890	break;
891
892	name = entp->d_name;
893
894	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
895	{
896	int len = strlen (name) + 1;
897
898	res++;
899
900	while (memofs + len > memlen)
901	{
902	memlen *= 2;
903	LOCK (wrklock);
904	req->data2ptr = names = realloc (names, memlen);
905	UNLOCK (wrklock);
906
907	if (!names)
908	break;
909	}
910
911	memcpy (names + memofs, name, len);
912	memofs += len;
913	}
914	}
915
916	if (errno)
917	res = -1;
918
919	req->result = res;
920	}
921
922	/*****************************************************************************/
923
924	static void *aio_proc (void *thr_arg)
925	{
926	aio_req req;
927	int type;
928	worker *self = (worker *)thr_arg;
929
930	do
931	{
932	LOCK (reqlock);
933
934	for (;;)
935	{
936	self->req = req = reqq_shift (&req_queue);
937
938	if (req)
939	break;
940
941	pthread_cond_wait (&reqwait, &reqlock);
942	}
943
944	UNLOCK (reqlock);
945
946	errno = 0; /* strictly unnecessary */
947	type = req->type; /* remember type for QUIT check */
948
949	if (!(req->flags & FLAG_CANCELLED))
950	switch (type)
951	{
952	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
953	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
954
955	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
956	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
957
958	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
959	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
960	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
961
962	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
963	case REQ_CLOSE: req->result = close (req->fd); break;
964	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
965	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
966	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
967	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
968	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
969
970	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
971	case REQ_FSYNC: req->result = fsync (req->fd); break;
972	case REQ_READDIR: scandir_ (req, self); break;
973
974	case REQ_BUSY:
975	{
976	struct timeval tv;
977
978	tv.tv_sec = req->fd;
979	tv.tv_usec = req->fd2;
980
981	req->result = select (0, 0, 0, 0, &tv);
982	}
983
984	case REQ_GROUP:
985	case REQ_NOP:
986	case REQ_QUIT:
987	break;
988
989	default:
990	req->result = ENOSYS;
991	break;
992	}
993
994	req->errorno = errno;
995
996	LOCK (reslock);
997
998	if (!reqq_push (&res_queue, req))
999	/* write a dummy byte to the pipe so fh becomes ready */
1000	write (respipe [1], &respipe, 1);
1001
1002	self->req = 0;
1003	worker_clear (self);
1004
1005	UNLOCK (reslock);
1006	}
1007	while (type != REQ_QUIT);
1008
1009	LOCK (wrklock);
1010	worker_free (self);
1011	UNLOCK (wrklock);
1012
1013	return 0;
1014	}
1015
1016	/*****************************************************************************/
1017
1018	static void atfork_prepare (void)
1019	{
1020	LOCK (wrklock);
1021	LOCK (reqlock);
1022	LOCK (reslock);
1023	#if !HAVE_PREADWRITE
1024	LOCK (preadwritelock);
1025	#endif
1026	#if !HAVE_READDIR_R
1027	LOCK (readdirlock);
1028	#endif
1029	}
1030
1031	static void atfork_parent (void)
1032	{
1033	#if !HAVE_READDIR_R
1034	UNLOCK (readdirlock);
1035	#endif
1036	#if !HAVE_PREADWRITE
1037	UNLOCK (preadwritelock);
1038	#endif
1039	UNLOCK (reslock);
1040	UNLOCK (reqlock);
1041	UNLOCK (wrklock);
1042	}	446	}
1043		447
1044	static void atfork_child (void)	448	static void atfork_child (void)
1045	{	449	{
1046	aio_req prv;
1047
1048	while (prv = reqq_shift (&req_queue))
1049	req_free (prv);
1050
1051	while (prv = reqq_shift (&res_queue))
1052	req_free (prv);
1053
1054	while (wrk_first.next != &wrk_first)
1055	{
1056	worker *wrk = wrk_first.next;
1057
1058	if (wrk->req)
1059	req_free (wrk->req);
1060
1061	worker_clear (wrk);
1062	worker_free (wrk);
1063	}
1064
1065	started = 0;
1066	nreqs = 0;
1067
1068	close (respipe [0]);
1069	close (respipe [1]);
1070	create_pipe ();	450	create_respipe ();
1071
1072	atfork_parent ();
1073	}	451	}
1074		452
1075	#define dREQ \	453	#define dREQ \
1076	aio_req req; \	454	aio_req req; \
1077	int req_pri = next_pri; \	455	int req_pri = next_pri; \
1078	next_pri = DEFAULT_PRI + PRI_BIAS; \	456	next_pri = EIO_PRI_DEFAULT; \
1079	\	457	\
1080	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
1081	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
1082	\	460	\
1083	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
1084	if (!req) \	462	if (!req) \
1085	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
1086	\	464	\
1087	req->callback = newSVsv (callback); \	465	req->callback = newSVsv (callback); \
1088	req->pri = req_pri	466	req->pri = req_pri
1089		467
1090	#define REQ_SEND \	468	#define REQ_SEND \
1091	req_send (req); \	469	req_submit (req); \
1092	\	470	\
1093	if (GIMME_V != G_VOID) \	471	if (GIMME_V != G_VOID) \
1094	XPUSHs (req_sv (req, AIO_REQ_KLASS));	472	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1095		473
1096	MODULE = IO::AIO PACKAGE = IO::AIO	474	MODULE = IO::AIO PACKAGE = IO::AIO
1097		475
1098	PROTOTYPES: ENABLE	476	PROTOTYPES: ENABLE
1099		477
1100	BOOT:	478	BOOT:
1101	{	479	{
1102	HV *stash = gv_stashpv ("IO::AIO", 1);	480	stash = gv_stashpv ("IO::AIO", 1);
		481
1103	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	482	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1104	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	483	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1105	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	484	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		485	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		486	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		487	#ifndef _WIN32
		488	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		489	#endif
1106		490
1107	create_pipe ();	491	create_respipe ();
1108	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1109	}
1110		492
		493	if (eio_init (want_poll, done_poll) < 0)
		494	croak ("IO::AIO: unable to initialise eio library");
		495
		496	/* atfork child called in fifo order, so before eio's handler */
		497	X_THREAD_ATFORK (0, 0, atfork_child);
		498	}
		499
1111	void	500	void
1112	min_parallel (nthreads)	501	max_poll_reqs (int nreqs)
1113	int nthreads
1114	PROTOTYPE: $	502	PROTOTYPE: $
		503	CODE:
		504	eio_set_max_poll_reqs (nreqs);
1115		505
1116	void	506	void
1117	max_parallel (nthreads)	507	max_poll_time (double nseconds)
1118	int nthreads
1119	PROTOTYPE: $	508	PROTOTYPE: $
1120
1121	int
1122	max_outstanding (nreqs)
1123	int nreqs
1124	PROTOTYPE: $
1125	CODE:	509	CODE:
1126	RETVAL = max_outstanding;	510	eio_set_max_poll_time (nseconds);
		511
		512	void
		513	min_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_min_parallel (nthreads);
		517
		518	void
		519	max_parallel (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_parallel (nthreads);
		523
		524	void
		525	max_idle (int nthreads)
		526	PROTOTYPE: $
		527	CODE:
		528	eio_set_max_idle (nthreads);
		529
		530	void
		531	max_outstanding (int maxreqs)
		532	PROTOTYPE: $
		533	CODE:
1127	max_outstanding = nreqs;	534	max_outstanding = maxreqs;
1128		535
1129	void	536	void
1130	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	537	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1131	SV * pathname
1132	int flags
1133	int mode
1134	SV * callback
1135	PROTOTYPE: $$$;$	538	PROTOTYPE: $$$;$
1136	PPCODE:	539	PPCODE:
1137	{	540	{
1138	dREQ;	541	dREQ;
1139		542
1140	req->type = REQ_OPEN;	543	req->type = EIO_OPEN;
1141	req->data = newSVsv (pathname);	544	req->sv1 = newSVsv (pathname);
1142	req->dataptr = SvPVbyte_nolen (req->data);	545	req->ptr1 = SvPVbyte_nolen (req->sv1);
1143	req->fd = flags;	546	req->int1 = flags;
1144	req->mode = mode;	547	req->int2 = mode;
1145		548
1146	REQ_SEND;	549	REQ_SEND;
1147	}	550	}
1148		551
1149	void	552	void
1150	aio_close (fh,callback=&PL_sv_undef)	553	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1151	SV * fh
1152	SV * callback
1153	PROTOTYPE: $;$	554	PROTOTYPE: $;$
1154	ALIAS:	555	ALIAS:
1155	aio_close = REQ_CLOSE
1156	aio_fsync = REQ_FSYNC	556	aio_fsync = EIO_FSYNC
1157	aio_fdatasync = REQ_FDATASYNC	557	aio_fdatasync = EIO_FDATASYNC
1158	PPCODE:	558	PPCODE:
1159	{	559	{
1160	dREQ;	560	dREQ;
1161		561
1162	req->type = ix;	562	req->type = ix;
1163	req->fh = newSVsv (fh);	563	req->sv1 = newSVsv (fh);
1164	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1165		565
1166	REQ_SEND (req);	566	REQ_SEND (req);
1167	}	567	}
1168		568
1169	void	569	void
		570	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $;$
		572	PPCODE:
		573	{
		574	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		575	dREQ;
		576
		577	if (close_pipe < 0)
		578	{
		579	int pipefd [2];
		580
		581	if (pipe (pipefd) < 0
		582	|| close (pipefd [1]) < 0
		583	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		584	abort (); /*D*/
		585
		586	close_pipe = pipefd [0];
		587	}
		588
		589	req->type = EIO_DUP2;
		590	req->int1 = close_pipe;
		591	req->sv2 = newSVsv (fh);
		592	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		593
		594	REQ_SEND (req);
		595	}
		596
		597	void
1170	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	598	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1171	SV * fh
1172	UV offset
1173	UV length
1174	SV * data
1175	UV dataoffset
1176	SV * callback
1177	ALIAS:	599	ALIAS:
1178	aio_read = REQ_READ	600	aio_read = EIO_READ
1179	aio_write = REQ_WRITE	601	aio_write = EIO_WRITE
1180	PROTOTYPE: $$$$$;$	602	PROTOTYPE: $$$$$;$
1181	PPCODE:	603	PPCODE:
1182	{	604	{
1183	aio_req req;
1184	STRLEN svlen;	605	STRLEN svlen;
1185	char *svptr = SvPVbyte (data, svlen);	606	char *svptr = SvPVbyte (data, svlen);
		607	UV len = SvUV (length);
1186		608
1187	SvUPGRADE (data, SVt_PV);	609	SvUPGRADE (data, SVt_PV);
1188	SvPOK_on (data);	610	SvPOK_on (data);
1189		611
1190	if (dataoffset < 0)	612	if (dataoffset < 0)
1191	dataoffset += svlen;	613	dataoffset += svlen;
1192		614
1193	if (dataoffset < 0 || dataoffset > svlen)	615	if (dataoffset < 0 || dataoffset > svlen)
1194	croak ("data offset outside of string");	616	croak ("dataoffset outside of data scalar");
1195		617
1196	if (ix == REQ_WRITE)	618	if (ix == EIO_WRITE)
1197	{	619	{
1198	/* write: check length and adjust. */	620	/* write: check length and adjust. */
1199	if (length < 0 || length + dataoffset > svlen)	621	if (!SvOK (length) || len + dataoffset > svlen)
1200	length = svlen - dataoffset;	622	len = svlen - dataoffset;
1201	}	623	}
1202	else	624	else
1203	{	625	{
1204	/* read: grow scalar as necessary */	626	/* read: grow scalar as necessary */
1205	svptr = SvGROW (data, length + dataoffset);	627	svptr = SvGROW (data, len + dataoffset + 1);
1206	}	628	}
1207		629
1208	if (length < 0)	630	if (len < 0)
1209	croak ("length must not be negative");	631	croak ("length must not be negative");
1210		632
1211	{	633	{
1212	dREQ;	634	dREQ;
1213		635
1214	req->type = ix;	636	req->type = ix;
1215	req->fh = newSVsv (fh);	637	req->sv1 = newSVsv (fh);
1216	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	638	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1217	: IoOFP (sv_2io (fh)));	639	: IoOFP (sv_2io (fh)));
		640	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1218	req->offset = offset;	641	req->size = len;
1219	req->length = length;
1220	req->data = SvREFCNT_inc (data);	642	req->sv2 = SvREFCNT_inc (data);
1221	req->dataptr = (char *)svptr + dataoffset;	643	req->ptr2 = (char *)svptr + dataoffset;
		644	req->stroffset = dataoffset;
1222		645
1223	if (!SvREADONLY (data))	646	if (!SvREADONLY (data))
1224	{	647	{
1225	SvREADONLY_on (data);	648	SvREADONLY_on (data);
1226	req->data2ptr = (void *)data;	649	req->flags |= FLAG_SV2_RO_OFF;
1227	}	650	}
1228		651
1229	REQ_SEND;	652	REQ_SEND;
1230	}	653	}
1231	}	654	}
1232		655
1233	void	656	void
		657	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$;$
		659	PPCODE:
		660	{
		661	SV *data;
		662	dREQ;
		663
		664	req->type = EIO_READLINK;
		665	req->sv1 = newSVsv (path);
		666	req->ptr1 = SvPVbyte_nolen (req->sv1);
		667
		668	REQ_SEND;
		669	}
		670
		671	void
1234	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	672	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1235	SV * out_fh
1236	SV * in_fh
1237	UV in_offset
1238	UV length
1239	SV * callback
1240	PROTOTYPE: $$$$;$	673	PROTOTYPE: $$$$;$
1241	PPCODE:	674	PPCODE:
1242	{	675	{
1243	dREQ;	676	dREQ;
1244		677
1245	req->type = REQ_SENDFILE;	678	req->type = EIO_SENDFILE;
1246	req->fh = newSVsv (out_fh);	679	req->sv1 = newSVsv (out_fh);
1247	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	680	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1248	req->fh2 = newSVsv (in_fh);	681	req->sv2 = newSVsv (in_fh);
1249	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	682	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1250	req->offset = in_offset;	683	req->offs = SvVAL64 (in_offset);
1251	req->length = length;	684	req->size = length;
1252		685
1253	REQ_SEND;	686	REQ_SEND;
1254	}	687	}
1255		688
1256	void	689	void
1257	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	690	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1258	SV * fh
1259	UV offset
1260	IV length
1261	SV * callback
1262	PROTOTYPE: $$$;$	691	PROTOTYPE: $$$;$
1263	PPCODE:	692	PPCODE:
1264	{	693	{
1265	dREQ;	694	dREQ;
1266		695
1267	req->type = REQ_READAHEAD;	696	req->type = EIO_READAHEAD;
1268	req->fh = newSVsv (fh);	697	req->sv1 = newSVsv (fh);
1269	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	698	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1270	req->offset = offset;	699	req->offs = SvVAL64 (offset);
1271	req->length = length;	700	req->size = length;
1272		701
1273	REQ_SEND;	702	REQ_SEND;
1274	}	703	}
1275		704
1276	void	705	void
1277	aio_stat (fh_or_path,callback=&PL_sv_undef)	706	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1278	SV * fh_or_path
1279	SV * callback
1280	ALIAS:	707	ALIAS:
1281	aio_stat = REQ_STAT	708	aio_stat = EIO_STAT
1282	aio_lstat = REQ_LSTAT	709	aio_lstat = EIO_LSTAT
1283	PPCODE:	710	PPCODE:
1284	{	711	{
1285	dREQ;	712	dREQ;
1286		713
1287	New (0, req->statdata, 1, Stat_t);	714	req->sv1 = newSVsv (fh_or_path);
1288	if (!req->statdata)
1289	{
1290	req_free (req);
1291	croak ("out of memory during aio_req->statdata allocation");
1292	}
1293		715
1294	if (SvPOK (fh_or_path))	716	if (SvPOK (req->sv1))
1295	{	717	{
1296	req->type = ix;	718	req->type = ix;
1297	req->data = newSVsv (fh_or_path);
1298	req->dataptr = SvPVbyte_nolen (req->data);	719	req->ptr1 = SvPVbyte_nolen (req->sv1);
1299	}	720	}
1300	else	721	else
1301	{	722	{
1302	req->type = REQ_FSTAT;	723	req->type = EIO_FSTAT;
1303	req->fh = newSVsv (fh_or_path);
1304	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1305	}	725	}
1306		726
1307	REQ_SEND;	727	REQ_SEND;
1308	}	728	}
1309		729
1310	void	730	void
		731	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		732	PPCODE:
		733	{
		734	dREQ;
		735
		736	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		737	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		738	req->sv1 = newSVsv (fh_or_path);
		739
		740	if (SvPOK (req->sv1))
		741	{
		742	req->type = EIO_UTIME;
		743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		744	}
		745	else
		746	{
		747	req->type = EIO_FUTIME;
		748	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		749	}
		750
		751	REQ_SEND;
		752	}
		753
		754	void
		755	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		756	PPCODE:
		757	{
		758	dREQ;
		759
		760	req->sv1 = newSVsv (fh_or_path);
		761	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		762
		763	if (SvPOK (req->sv1))
		764	{
		765	req->type = EIO_TRUNCATE;
		766	req->ptr1 = SvPVbyte_nolen (req->sv1);
		767	}
		768	else
		769	{
		770	req->type = EIO_FTRUNCATE;
		771	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		772	}
		773
		774	REQ_SEND;
		775	}
		776
		777	void
		778	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		779	ALIAS:
		780	aio_chmod = EIO_CHMOD
		781	aio_mkdir = EIO_MKDIR
		782	PPCODE:
		783	{
		784	dREQ;
		785
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (SvPOK (req->sv1))
		790	{
		791	req->type = ix;
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793	}
		794	else
		795	{
		796	req->type = EIO_FCHMOD;
		797	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		798	}
		799
		800	REQ_SEND;
		801	}
		802
		803	void
		804	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		805	PPCODE:
		806	{
		807	dREQ;
		808
		809	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		810	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		811	req->sv1 = newSVsv (fh_or_path);
		812
		813	if (SvPOK (req->sv1))
		814	{
		815	req->type = EIO_CHOWN;
		816	req->ptr1 = SvPVbyte_nolen (req->sv1);
		817	}
		818	else
		819	{
		820	req->type = EIO_FCHOWN;
		821	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		822	}
		823
		824	REQ_SEND;
		825	}
		826
		827	void
1311	aio_unlink (pathname,callback=&PL_sv_undef)	828	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1312	SV * pathname
1313	SV * callback
1314	ALIAS:	829	ALIAS:
1315	aio_unlink = REQ_UNLINK	830	aio_unlink = EIO_UNLINK
1316	aio_rmdir = REQ_RMDIR	831	aio_rmdir = EIO_RMDIR
1317	aio_readdir = REQ_READDIR	832	aio_readdir = EIO_READDIR
1318	PPCODE:	833	PPCODE:
1319	{	834	{
1320	dREQ;	835	dREQ;
1321		836
1322	req->type = ix;	837	req->type = ix;
1323	req->data = newSVsv (pathname);	838	req->sv1 = newSVsv (pathname);
1324	req->dataptr = SvPVbyte_nolen (req->data);	839	req->ptr1 = SvPVbyte_nolen (req->sv1);
		840
		841	REQ_SEND;
		842	}
		843
		844	void
		845	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		846	ALIAS:
		847	aio_link = EIO_LINK
		848	aio_symlink = EIO_SYMLINK
		849	aio_rename = EIO_RENAME
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->type = ix;
		855	req->sv1 = newSVsv (oldpath);
		856	req->ptr1 = SvPVbyte_nolen (req->sv1);
		857	req->sv2 = newSVsv (newpath);
		858	req->ptr2 = SvPVbyte_nolen (req->sv2);
1325		859
1326	REQ_SEND;	860	REQ_SEND;
1327	}	861	}
1328		862
1329	void	863	void
1330	aio_link (oldpath,newpath,callback=&PL_sv_undef)	864	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1331	SV * oldpath
1332	SV * newpath
1333	SV * callback
1334	ALIAS:
1335	aio_link = REQ_LINK
1336	aio_symlink = REQ_SYMLINK
1337	aio_rename = REQ_RENAME
1338	PPCODE:	865	PPCODE:
1339	{	866	{
1340	dREQ;	867	dREQ;
1341		868
1342	req->type = ix;	869	req->type = EIO_MKNOD;
1343	req->fh = newSVsv (oldpath);	870	req->sv1 = newSVsv (pathname);
1344	req->data2ptr = SvPVbyte_nolen (req->fh);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1345	req->data = newSVsv (newpath);	872	req->int2 = (mode_t)mode;
1346	req->dataptr = SvPVbyte_nolen (req->data);	873	req->offs = dev;
1347		874
1348	REQ_SEND;	875	REQ_SEND;
1349	}	876	}
1350		877
1351	void	878	void
1352	aio_busy (delay,callback=&PL_sv_undef)	879	aio_busy (double delay, SV *callback=&PL_sv_undef)
1353	double delay
1354	SV * callback
1355	PPCODE:	880	PPCODE:
1356	{	881	{
1357	dREQ;	882	dREQ;
1358		883
1359	req->type = REQ_BUSY;	884	req->type = EIO_BUSY;
1360	req->fd = delay < 0. ? 0 : delay;	885	req->nv1 = delay < 0. ? 0. : delay;
1361	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1362		886
1363	REQ_SEND;	887	REQ_SEND;
1364	}	888	}
1365		889
1366	void	890	void
1367	aio_group (callback=&PL_sv_undef)	891	aio_group (SV *callback=&PL_sv_undef)
1368	SV * callback
1369	PROTOTYPE: ;$	892	PROTOTYPE: ;$
1370	PPCODE:	893	PPCODE:
1371	{	894	{
1372	dREQ;	895	dREQ;
1373		896
1374	req->type = REQ_GROUP;	897	req->type = EIO_GROUP;
		898
1375	req_send (req);	899	eio_submit (req);
1376
1377	XPUSHs (req_sv (req, AIO_GRP_KLASS));	900	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1378	}	901	}
1379		902
1380	void	903	void
1381	aio_nop (callback=&PL_sv_undef)	904	aio_nop (SV *callback=&PL_sv_undef)
1382	SV * callback	905	ALIAS:
		906	aio_nop = EIO_NOP
		907	aio_sync = EIO_SYNC
1383	PPCODE:	908	PPCODE:
1384	{	909	{
1385	dREQ;	910	dREQ;
1386		911
1387	req->type = REQ_NOP;	912	req->type = ix;
1388		913
1389	REQ_SEND;	914	REQ_SEND;
1390	}	915	}
1391		916
1392	void	917	int
1393	aioreq_pri (int pri = DEFAULT_PRI)	918	aioreq_pri (int pri = 0)
1394	CODE:	919	PROTOTYPE: ;$
		920	CODE:
		921	RETVAL = next_pri;
		922	if (items > 0)
		923	{
1395	if (pri < PRI_MIN) pri = PRI_MIN;	924	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1396	if (pri > PRI_MAX) pri = PRI_MAX;	925	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1397	next_pri = pri + PRI_BIAS;	926	next_pri = pri;
		927	}
		928	OUTPUT:
		929	RETVAL
1398		930
1399	void	931	void
1400	aioreq_nice (int nice = 0)	932	aioreq_nice (int nice = 0)
1401	CODE:	933	CODE:
1402	nice = next_pri - nice;	934	nice = next_pri - nice;
1403	if (nice < PRI_MIN) nice = PRI_MIN;	935	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1404	if (nice > PRI_MAX) nice = PRI_MAX;	936	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1405	next_pri = nice + PRI_BIAS;	937	next_pri = nice;
1406		938
1407	void	939	void
1408	flush ()	940	flush ()
1409	PROTOTYPE:	941	PROTOTYPE:
1410	CODE:	942	CODE:
1411	while (nreqs)	943	while (eio_nreqs ())
1412	{	944	{
1413	poll_wait ();	945	poll_wait ();
1414	poll_cb ();	946	poll_cb ();
1415	}	947	}
1416		948
1417	void	949	int
1418	poll()	950	poll()
1419	PROTOTYPE:	951	PROTOTYPE:
1420	CODE:	952	CODE:
1421	if (nreqs)
1422	{
1423	poll_wait ();	953	poll_wait ();
1424	poll_cb ();	954	RETVAL = poll_cb ();
1425	}	955	OUTPUT:
		956	RETVAL
1426		957
1427	int	958	int
1428	poll_fileno()	959	poll_fileno()
1429	PROTOTYPE:	960	PROTOTYPE:
1430	CODE:	961	CODE:
…		…
1442		973
1443	void	974	void
1444	poll_wait()	975	poll_wait()
1445	PROTOTYPE:	976	PROTOTYPE:
1446	CODE:	977	CODE:
1447	if (nreqs)
1448	poll_wait ();	978	poll_wait ();
1449		979
1450	int	980	int
1451	nreqs()	981	nreqs()
1452	PROTOTYPE:	982	PROTOTYPE:
1453	CODE:	983	CODE:
1454	RETVAL = nreqs;	984	RETVAL = eio_nreqs ();
1455	OUTPUT:	985	OUTPUT:
1456	RETVAL	986	RETVAL
1457		987
		988	int
		989	nready()
		990	PROTOTYPE:
		991	CODE:
		992	RETVAL = eio_nready ();
		993	OUTPUT:
		994	RETVAL
		995
		996	int
		997	npending()
		998	PROTOTYPE:
		999	CODE:
		1000	RETVAL = eio_npending ();
		1001	OUTPUT:
		1002	RETVAL
		1003
		1004	int
		1005	nthreads()
		1006	PROTOTYPE:
		1007	CODE:
		1008	RETVAL = eio_nthreads ();
		1009	OUTPUT:
		1010	RETVAL
		1011
		1012	void _on_next_submit (SV *cb)
		1013	CODE:
		1014	SvREFCNT_dec (on_next_submit);
		1015	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1016
1458	PROTOTYPES: DISABLE	1017	PROTOTYPES: DISABLE
1459		1018
1460	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1019	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1461		1020
1462	void	1021	void
1463	cancel (aio_req_ornot req)	1022	cancel (aio_req_ornot req)
1464	CODE:	1023	CODE:
1465	req_cancel (req);	1024	eio_cancel (req);
1466		1025
1467	void	1026	void
1468	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1027	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1469	CODE:	1028	CODE:
1470	SvREFCNT_dec (req->callback);	1029	SvREFCNT_dec (req->callback);
…		…
1475	void	1034	void
1476	add (aio_req grp, ...)	1035	add (aio_req grp, ...)
1477	PPCODE:	1036	PPCODE:
1478	{	1037	{
1479	int i;	1038	int i;
1480	aio_req req;
1481		1039
1482	if (grp->fd == 2)	1040	if (grp->int1 == 2)
1483	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1041	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1484		1042
1485	for (i = 1; i < items; ++i )	1043	for (i = 1; i < items; ++i )
1486	{	1044	{
		1045	aio_req req;
		1046
1487	if (GIMME_V != G_VOID)	1047	if (GIMME_V != G_VOID)
1488	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1048	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1489		1049
1490	req = SvAIO_REQ (ST (i));	1050	req = SvAIO_REQ (ST (i));
1491		1051
1492	if (req)	1052	if (req)
1493	{	1053	eio_grp_add (grp, req);
1494	++grp->length;
1495	req->grp = grp;
1496
1497	req->grp_prev = 0;
1498	req->grp_next = grp->grp_first;
1499
1500	if (grp->grp_first)
1501	grp->grp_first->grp_prev = req;
1502
1503	grp->grp_first = req;
1504	}
1505	}	1054	}
1506	}	1055	}
1507		1056
1508	void	1057	void
1509	cancel_subs (aio_req_ornot req)	1058	cancel_subs (aio_req_ornot req)
…		…
1513	void	1062	void
1514	result (aio_req grp, ...)	1063	result (aio_req grp, ...)
1515	CODE:	1064	CODE:
1516	{	1065	{
1517	int i;	1066	int i;
		1067	AV *av;
		1068
		1069	grp->errorno = errno;
		1070
1518	AV *av = newAV ();	1071	av = newAV ();
1519		1072
1520	for (i = 1; i < items; ++i )	1073	for (i = 1; i < items; ++i )
1521	av_push (av, newSVsv (ST (i)));	1074	av_push (av, newSVsv (ST (i)));
1522		1075
1523	SvREFCNT_dec (grp->data);	1076	SvREFCNT_dec (grp->sv1);
1524	grp->data = (SV *)av;	1077	grp->sv1 = (SV *)av;
1525	}	1078	}
		1079
		1080	void
		1081	errno (aio_req grp, int errorno = errno)
		1082	CODE:
		1083	grp->errorno = errorno;
1526		1084
1527	void	1085	void
1528	limit (aio_req grp, int limit)	1086	limit (aio_req grp, int limit)
1529	CODE:	1087	CODE:
1530	grp->fd2 = limit;	1088	eio_grp_limit (grp, limit);
1531	aio_grp_feed (grp);
1532		1089
1533	void	1090	void
1534	feed (aio_req grp, SV *callback=&PL_sv_undef)	1091	feed (aio_req grp, SV *callback=&PL_sv_undef)
1535	CODE:	1092	CODE:
1536	{	1093	{
1537	SvREFCNT_dec (grp->fh2);	1094	SvREFCNT_dec (grp->sv2);
1538	grp->fh2 = newSVsv (callback);	1095	grp->sv2 = newSVsv (callback);
1539		1096
1540	if (grp->fd2 <= 0)	1097	if (grp->int2 <= 0)
1541	grp->fd2 = 2;	1098	grp->int2 = 2;
1542		1099
1543	aio_grp_feed (grp);	1100	eio_grp_limit (grp, grp->int2);
1544	}	1101	}
1545		1102

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