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

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