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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:44:48 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	#ifndef PTHREAD_STACK_MIN	85	static HV *stash;
53	/* care for broken platforms, e.g. windows */	86	typedef SV SV8; /* byte-sv, used for argument-checking */
54	# define PTHREAD_STACK_MIN 16384
55	#endif
56
57	#if __ia64
58	# define STACKSIZE 65536
59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
60	# define STACKSIZE PTHREAD_STACK_MIN
61	#else
62	# define STACKSIZE 16384
63	#endif
64
65	/* buffer size for various temporary buffers */
66	#define AIO_BUFSIZE 65536
67
68	#define dBUF \
69	char *aio_buf; \
70	LOCK (wrklock); \
71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
72	UNLOCK (wrklock); \
73	if (!aio_buf) \
74	return -1;
75
76	enum {
77	REQ_QUIT,
78	REQ_OPEN, REQ_CLOSE,
79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
80	REQ_SENDFILE,
81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
82	REQ_FSYNC, REQ_FDATASYNC,
83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
84	REQ_READDIR,
85	REQ_LINK, REQ_SYMLINK,
86	REQ_GROUP, REQ_NOP,
87	REQ_BUSY,
88	};
89		87
90	#define AIO_REQ_KLASS "IO::AIO::REQ"	88	#define AIO_REQ_KLASS "IO::AIO::REQ"
91	#define AIO_GRP_KLASS "IO::AIO::GRP"	89	#define AIO_GRP_KLASS "IO::AIO::GRP"
92		90
93	typedef struct aio_cb	91	#define EIO_REQ_MEMBERS \
94	{
95	struct aio_cb *volatile next;
96
97	SV *data, *callback;	92	SV *callback; \
98	SV *fh, *fh2;	93	SV *sv1, *sv2; \
99	void *dataptr, *data2ptr;
100	Stat_t *statdata;
101	off_t offset;
102	size_t length;
103	ssize_t result;
104
105	STRLEN dataoffset;	94	STRLEN stroffset; \
106	int type;	95	SV *self;
107	int fd, fd2;
108	int errorno;
109	mode_t mode; /* open */
110		96
111	unsigned char flags;	97	#define EIO_NO_WRAPPERS 1
112	unsigned char pri;
113		98
114	SV *self; /* the perl counterpart of this request, if any */	99	#include "libeio/eio.h"
115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	100
116	} 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)
117		107
118	enum {	108	enum {
119	FLAG_CANCELLED = 0x01,	109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
120	};	110	};
121		111
		112	#include "libeio/eio.c"
		113
122	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
123	typedef aio_cb *aio_req_ornot;	115	typedef eio_req *aio_req_ornot;
124		116
125	enum {	117	static SV *on_next_submit;
126	PRI_MIN = -4,	118	static int next_pri = EIO_PRI_DEFAULT;
127	PRI_MAX = 4,	119	static int max_outstanding;
128		120
129	DEFAULT_PRI = 0,	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
130	PRI_BIAS = -PRI_MIN,
131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
132	};
133		122
134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
135
136	static int started, wanted;
137	static volatile int nreqs;
138	static int respipe [2];
139
140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
142	#else
143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
144	#endif
145
146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
148
149	/* worker threasd management */
150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
151
152	typedef struct worker {
153	/* locked by wrklock */
154	struct worker *prev, *next;
155
156	pthread_t tid;
157
158	/* locked by reslock, reqlock or wrklock */
159	aio_req req; /* currently processed request */
160	void *dbuf;
161	DIR *dirp;
162	} worker;
163
164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
165
166	static void worker_clear (worker *wrk)
167	{
168	if (wrk->dirp)
169	{
170	closedir (wrk->dirp);
171	wrk->dirp = 0;
172	}
173
174	if (wrk->dbuf)
175	{
176	free (wrk->dbuf);
177	wrk->dbuf = 0;
178	}
179	}
180
181	static void worker_free (worker *wrk)
182	{
183	wrk->next->prev = wrk->prev;
184	wrk->prev->next = wrk->next;
185
186	free (wrk);
187	}
188
189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
192
193	/*
194	* a somewhat faster data structure might be nice, but
195	* with 8 priorities this actually needs <20 insns
196	* per shift, the most expensive operation.
197	*/
198	typedef struct {
199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
200	int size;
201	} reqq;
202
203	static reqq req_queue;
204	static reqq res_queue;
205
206	int reqq_push (reqq *q, aio_req req)
207	{
208	int pri = req->pri;
209	req->next = 0;
210
211	if (q->qe[pri])
212	{
213	q->qe[pri]->next = req;
214	q->qe[pri] = req;
215	}
216	else
217	q->qe[pri] = q->qs[pri] = req;
218
219	return q->size++;
220	}
221
222	aio_req reqq_shift (reqq *q)
223	{
224	int pri;
225
226	if (!q->size)
227	return 0;
228
229	--q->size;
230
231	for (pri = NUM_PRI; pri--; )
232	{
233	aio_req req = q->qs[pri];
234
235	if (req)
236	{
237	if (!(q->qs[pri] = req->next))
238	q->qe[pri] = 0;
239
240	return req;
241	}
242	}
243
244	abort ();
245	}
246
247	static int poll_cb ();
248	static void req_invoke (aio_req req);
249	static void req_free (aio_req req);	123	static void req_destroy (aio_req req);
250	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	}
251		139
252	/* must be called at most once */	140	/* must be called at most once */
253	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
254	{	142	{
255	if (!req->self)	143	if (!req->self)
…		…
273	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
274	}	162	}
275		163
276	static void aio_grp_feed (aio_req grp)	164	static void aio_grp_feed (aio_req grp)
277	{	165	{
278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	166	if (grp->sv2 && SvOK (grp->sv2))
279	{	167	{
280	int old_len = grp->length;
281
282	if (grp->fh2 && SvOK (grp->fh2))
283	{
284	dSP;	168	dSP;
285		169
286	ENTER;	170	ENTER;
287	SAVETMPS;	171	SAVETMPS;
288	PUSHMARK (SP);	172	PUSHMARK (SP);
289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
290	PUTBACK;	174	PUTBACK;
291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
292	SPAGAIN;	176	SPAGAIN;
293	FREETMPS;	177	FREETMPS;
294	LEAVE;	178	LEAVE;
295	}
296
297	/* stop if no progress has been made */
298	if (old_len == grp->length)
299	{
300	SvREFCNT_dec (grp->fh2);
301	grp->fh2 = 0;
302	break;
303	}
304	}	179	}
305	}	180	}
306		181
307	static void aio_grp_dec (aio_req grp)	182	static void req_submit (eio_req *req)
308	{	183	{
309	--grp->length;	184	eio_submit (req);
310		185
311	/* call feeder, if applicable */	186	if (on_next_submit)
312	aio_grp_feed (grp);
313
314	/* finish, if done */
315	if (!grp->length && grp->fd)
316	{	187	{
317	req_invoke (grp);	188	dSP;
318	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);
319	}	196	}
320	}	197	}
321		198
322	static void poll_wait ()	199	static int req_invoke (eio_req *req)
323	{	200	{
324	fd_set rfd;	201	dSP;
325		202
326	while (nreqs)	203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
		206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
327	{	207	{
328	int size;
329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
330	LOCK (reslock);
331	#endif
332	size = res_queue.size;
333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
334	UNLOCK (reslock);
335	#endif
336
337	if (size)
338	return;
339
340	FD_ZERO(&rfd);
341	FD_SET(respipe [0], &rfd);
342
343	select (respipe [0] + 1, &rfd, 0, 0, 0);
344	}
345	}
346
347	static void req_invoke (aio_req req)
348	{
349	dSP;
350
351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
352	{
353	errno = req->errorno;
354
355	ENTER;	208	ENTER;
356	SAVETMPS;	209	SAVETMPS;
357	PUSHMARK (SP);	210	PUSHMARK (SP);
358	EXTEND (SP, 1);	211	EXTEND (SP, 1);
359		212
360	switch (req->type)	213	switch (req->type)
361	{	214	{
362	case REQ_READDIR:	215	case EIO_READDIR:
363	{	216	{
364	SV *rv = &PL_sv_undef;	217	SV *rv = &PL_sv_undef;
365		218
366	if (req->result >= 0)	219	if (req->result >= 0)
367	{	220	{
368	int i;	221	int i;
369	char *buf = req->data2ptr;	222	char *buf = req->ptr2;
370	AV *av = newAV ();	223	AV *av = newAV ();
371		224
372	av_extend (av, req->result - 1);	225	av_extend (av, req->result - 1);
373		226
374	for (i = 0; i < req->result; ++i)	227	for (i = 0; i < req->result; ++i)
…		…
384		237
385	PUSHs (rv);	238	PUSHs (rv);
386	}	239	}
387	break;	240	break;
388		241
389	case REQ_OPEN:	242	case EIO_OPEN:
390	{	243	{
391	/* convert fd to fh */	244	/* convert fd to fh */
392	SV *fh;	245	SV *fh = &PL_sv_undef;
393		246
394	PUSHs (sv_2mortal (newSViv (req->result)));	247	if (req->result >= 0)
395	PUTBACK;	248	{
396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	249	GV *gv = (GV *)sv_newmortal ();
397	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);
398		256
399	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	);
400		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
401	PUSHMARK (SP);	269	PUSHs (fh);
402	XPUSHs (sv_2mortal (fh));
403	}	270	}
404	break;	271	break;
405		272
406	case REQ_GROUP:	273	case EIO_GROUP:
407	req->fd = 2; /* mark group as finished */	274	req->int1 = 2; /* mark group as finished */
408		275
409	if (req->data)	276	if (req->sv1)
410	{	277	{
411	int i;	278	int i;
412	AV *av = (AV *)req->data;	279	AV *av = (AV *)req->sv1;
413		280
414	EXTEND (SP, AvFILL (av) + 1);	281	EXTEND (SP, AvFILL (av) + 1);
415	for (i = 0; i <= AvFILL (av); ++i)	282	for (i = 0; i <= AvFILL (av); ++i)
416	PUSHs (*av_fetch (av, i, 0));	283	PUSHs (*av_fetch (av, i, 0));
417	}	284	}
418	break;	285	break;
419		286
420	case REQ_NOP:	287	case EIO_NOP:
421	case REQ_BUSY:	288	case EIO_BUSY:
422	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 */
423		315
424	default:	316	default:
425	PUSHs (sv_2mortal (newSViv (req->result)));	317	PUSHs (sv_2mortal (newSViv (req->result)));
426	break;	318	break;
427	}	319	}
428		320
		321	errno = req->errorno;
429		322
430	PUTBACK;	323	PUTBACK;
431	call_sv (req->callback, G_VOID | G_EVAL);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
432	SPAGAIN;	325	SPAGAIN;
433		326
434	FREETMPS;	327	FREETMPS;
435	LEAVE;	328	LEAVE;
		329
		330	PUTBACK;
436	}	331	}
437		332
438	if (req->grp)	333	return !!SvTRUE (ERRSV);
439	{
440	aio_req grp = req->grp;
441
442	/* unlink request */
443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
445
446	if (grp->grp_first == req)
447	grp->grp_first = req->grp_next;
448
449	aio_grp_dec (grp);
450	}
451
452	if (SvTRUE (ERRSV))
453	{
454	req_free (req);
455	croak (0);
456	}
457	}	334	}
458		335
459	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
460	{	337	{
461	if (req->self)	338	if (req->self)
462	{	339	{
463	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
464	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
465	}	342	}
466		343
467	SvREFCNT_dec (req->data);
468	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
469	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
470	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
471	Safefree (req->statdata);
472
473	if (req->type == REQ_READDIR)
474	free (req->data2ptr);
475		347
476	Safefree (req);	348	Safefree (req);
477	}	349	}
478		350
479	static void req_cancel_subs (aio_req grp)	351	static void req_cancel_subs (aio_req grp)
480	{	352	{
481	aio_req sub;	353	aio_req sub;
482		354
483	if (grp->type != REQ_GROUP)	355	if (grp->type != EIO_GROUP)
484	return;	356	return;
485		357
486	SvREFCNT_dec (grp->fh2);	358	SvREFCNT_dec (grp->sv2);
487	grp->fh2 = 0;	359	grp->sv2 = 0;
488		360
489	for (sub = grp->grp_first; sub; sub = sub->grp_next)	361	eio_grp_cancel (grp);
490	req_cancel (sub);
491	}	362	}
492		363
493	static void req_cancel (aio_req req)	364	#ifdef USE_SOCKETS_AS_HANDLES
494	{	365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
495	req->flags |= FLAG_CANCELLED;	366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
496		369
497	req_cancel_subs (req);	370	static void
498	}	371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
499		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
500	static int poll_cb ()	432	static int poll_cb (void)
501	{	433	{
502	dSP;
503	int count = 0;
504	int do_croak = 0;
505	aio_req req;
506
507	for (;;)	434	for (;;)
508	{	435	{
509	LOCK (reslock);	436	int res = eio_poll ();
510	req = reqq_shift (&res_queue);
511		437
512	if (req)	438	if (res > 0)
513	{
514	if (!res_queue.size)
515	{
516	/* read any signals sent by the worker threads */
517	char buf [32];
518	while (read (respipe [0], buf, 32) == 32)
519	;
520	}
521	}
522
523	UNLOCK (reslock);
524
525	if (!req)
526	break;	439	croak (0);
527		440
528	--nreqs;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
529		443
530	if (req->type == REQ_QUIT)	444	poll_wait ();
531	started--;
532	else if (req->type == REQ_GROUP && req->length)
533	{
534	req->fd = 1; /* mark request as delayed */
535	continue;
536	}
537	else
538	{
539	if (req->type == REQ_READ)
540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
541
542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
543	SvREADONLY_off (req->data);
544
545	if (req->statdata)
546	{
547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
548	PL_laststatval = req->result;
549	PL_statcache = *(req->statdata);
550	}
551
552	req_invoke (req);
553
554	count++;
555	}
556
557	req_free (req);
558	}	445	}
559
560	return count;
561	}
562
563	static void *aio_proc(void *arg);
564
565	static void start_thread (void)
566	{
567	sigset_t fullsigset, oldsigset;
568	pthread_attr_t attr;
569
570	worker *wrk = calloc (1, sizeof (worker));
571
572	if (!wrk)
573	croak ("unable to allocate worker thread data");
574
575	pthread_attr_init (&attr);
576	pthread_attr_setstacksize (&attr, STACKSIZE);
577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
578
579	sigfillset (&fullsigset);
580
581	LOCK (wrklock);
582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
583
584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
585	{
586	wrk->prev = &wrk_first;
587	wrk->next = wrk_first.next;
588	wrk_first.next->prev = wrk;
589	wrk_first.next = wrk;
590	started++;
591	}
592	else
593	free (wrk);
594
595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
596	UNLOCK (wrklock);
597	}
598
599	static void req_send (aio_req req)
600	{
601	while (started < wanted && nreqs >= started)
602	start_thread ();
603
604	++nreqs;
605
606	LOCK (reqlock);
607	reqq_push (&req_queue, req);
608	pthread_cond_signal (&reqwait);
609	UNLOCK (reqlock);
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	req_send (req);
622	}
623
624	static void min_parallel (int nthreads)
625	{
626	if (wanted < nthreads)
627	wanted = nthreads;
628	}
629
630	static void max_parallel (int nthreads)
631	{
632	int cur = started;
633
634	if (wanted > nthreads)
635	wanted = nthreads;
636
637	while (cur > wanted)
638	{
639	end_thread ();
640	cur--;
641	}
642
643	while (started > wanted)
644	{
645	poll_wait ();
646	poll_cb ();
647	}
648	}
649
650	static void create_pipe ()
651	{
652	if (pipe (respipe))
653	croak ("unable to initialize result pipe");
654
655	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
656	croak ("cannot set result pipe to nonblocking mode");
657
658	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
659	croak ("cannot set result pipe to nonblocking mode");
660	}
661
662	/*****************************************************************************/
663	/* work around various missing functions */
664
665	#if !HAVE_PREADWRITE
666	# define pread aio_pread
667	# define pwrite aio_pwrite
668
669	/*
670	* make our pread/pwrite safe against themselves, but not against
671	* normal read/write by using a mutex. slows down execution a lot,
672	* but that's your problem, not mine.
673	*/
674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
675
676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
677	{
678	ssize_t res;
679	off_t ooffset;
680
681	LOCK (preadwritelock);
682	ooffset = lseek (fd, 0, SEEK_CUR);
683	lseek (fd, offset, SEEK_SET);
684	res = read (fd, buf, count);
685	lseek (fd, ooffset, SEEK_SET);
686	UNLOCK (preadwritelock);
687
688	return res;
689	}
690
691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
692	{
693	ssize_t res;
694	off_t ooffset;
695
696	LOCK (preadwritelock);
697	ooffset = lseek (fd, 0, SEEK_CUR);
698	lseek (fd, offset, SEEK_SET);
699	res = write (fd, buf, count);
700	lseek (fd, offset, SEEK_SET);
701	UNLOCK (preadwritelock);
702
703	return res;
704	}
705	#endif
706
707	#if !HAVE_FDATASYNC
708	# define fdatasync fsync
709	#endif
710
711	#if !HAVE_READAHEAD
712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
713
714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
715	{
716	dBUF;
717
718	while (count > 0)
719	{
720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
721
722	pread (fd, aio_buf, len, offset);
723	offset += len;
724	count -= len;
725	}
726
727	errno = 0;
728	}
729
730	#endif
731
732	#if !HAVE_READDIR_R
733	# define readdir_r aio_readdir_r
734
735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
736
737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
738	{
739	struct dirent *e;
740	int errorno;
741
742	LOCK (readdirlock);
743
744	e = readdir (dirp);
745	errorno = errno;
746
747	if (e)
748	{
749	*res = ent;
750	strcpy (ent->d_name, e->d_name);
751	}
752	else
753	*res = 0;
754
755	UNLOCK (readdirlock);
756
757	errno = errorno;
758	return e ? 0 : -1;
759	}
760	#endif
761
762	/* sendfile always needs emulation */
763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
764	{
765	ssize_t res;
766
767	if (!count)
768	return 0;
769
770	#if HAVE_SENDFILE
771	# if __linux
772	res = sendfile (ofd, ifd, &offset, count);
773
774	# elif __freebsd
775	/*
776	* Of course, the freebsd sendfile is a dire hack with no thoughts
777	* wasted on making it similar to other I/O functions.
778	*/
779	{
780	off_t sbytes;
781	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
782
783	if (res < 0 && sbytes)
784	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
785	res = sbytes;
786	}
787
788	# elif __hpux
789	res = sendfile (ofd, ifd, offset, count, 0, 0);
790
791	# elif __solaris
792	{
793	struct sendfilevec vec;
794	size_t sbytes;
795
796	vec.sfv_fd = ifd;
797	vec.sfv_flag = 0;
798	vec.sfv_off = offset;
799	vec.sfv_len = count;
800
801	res = sendfilev (ofd, &vec, 1, &sbytes);
802
803	if (res < 0 && sbytes)
804	res = sbytes;
805	}
806
807	# endif
808	#else
809	res = -1;
810	errno = ENOSYS;
811	#endif
812
813	if (res < 0
814	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
815	#if __solaris
816	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
817	#endif
818	)
819	)
820	{
821	/* emulate sendfile. this is a major pain in the ass */
822	dBUF;
823
824	res = 0;
825
826	while (count)
827	{
828	ssize_t cnt;
829
830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
831
832	if (cnt <= 0)
833	{
834	if (cnt && !res) res = -1;
835	break;
836	}
837
838	cnt = write (ofd, aio_buf, cnt);
839
840	if (cnt <= 0)
841	{
842	if (cnt && !res) res = -1;
843	break;
844	}
845
846	offset += cnt;
847	res += cnt;
848	count -= cnt;
849	}
850	}
851
852	return res;
853	}
854
855	/* read a full directory */
856	static void scandir_ (aio_req req, worker *self)
857	{
858	DIR *dirp;
859	union
860	{
861	struct dirent d;
862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
863	} *u;
864	struct dirent *entp;
865	char *name, *names;
866	int memlen = 4096;
867	int memofs = 0;
868	int res = 0;
869	int errorno;
870
871	LOCK (wrklock);
872	self->dirp = dirp = opendir (req->dataptr);
873	self->dbuf = u = malloc (sizeof (*u));
874	UNLOCK (wrklock);
875
876	req->data2ptr = names = malloc (memlen);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}
909	}
910
911	if (errno)
912	res = -1;
913
914	req->result = res;
915	}
916
917	/*****************************************************************************/
918
919	static void *aio_proc (void *thr_arg)
920	{
921	aio_req req;
922	int type;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}
1010
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}	446	}
1038		447
1039	static void atfork_child (void)	448	static void atfork_child (void)
1040	{	449	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();	450	create_respipe ();
1066
1067	atfork_parent ();
1068	}	451	}
1069		452
1070	#define dREQ \	453	#define dREQ \
1071	aio_req req; \	454	aio_req req; \
1072	int req_pri = next_pri; \	455	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \	456	next_pri = EIO_PRI_DEFAULT; \
1074	\	457	\
1075	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
1076	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
1077	\	460	\
1078	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
1079	if (!req) \	462	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
1081	\	464	\
1082	req->callback = newSVsv (callback); \	465	req->callback = newSVsv (callback); \
1083	req->pri = req_pri	466	req->pri = req_pri
1084		467
1085	#define REQ_SEND \	468	#define REQ_SEND \
1086	req_send (req); \	469	req_submit (req); \
1087	\	470	\
1088	if (GIMME_V != G_VOID) \	471	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));	472	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090		473
1091	MODULE = IO::AIO PACKAGE = IO::AIO	474	MODULE = IO::AIO PACKAGE = IO::AIO
1092		475
1093	PROTOTYPES: ENABLE	476	PROTOTYPES: ENABLE
1094		477
1095	BOOT:	478	BOOT:
1096	{	479	{
1097	HV *stash = gv_stashpv ("IO::AIO", 1);	480	stash = gv_stashpv ("IO::AIO", 1);
		481
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	482	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	483	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100	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
1101		490
1102	create_pipe ();	491	create_respipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1104	}
1105		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
1106	void	500	void
1107	min_parallel (nthreads)	501	max_poll_reqs (int nreqs)
1108	int nthreads
1109	PROTOTYPE: $	502	PROTOTYPE: $
		503	CODE:
		504	eio_set_max_poll_reqs (nreqs);
1110		505
1111	void	506	void
1112	max_parallel (nthreads)	507	max_poll_time (double nseconds)
1113	int nthreads
1114	PROTOTYPE: $	508	PROTOTYPE: $
		509	CODE:
		510	eio_set_max_poll_time (nseconds);
1115		511
1116	void	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:
		534	max_outstanding = maxreqs;
		535
		536	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	537	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$	538	PROTOTYPE: $$$;$
1123	PPCODE:	539	PPCODE:
1124	{	540	{
1125	dREQ;	541	dREQ;
1126		542
1127	req->type = REQ_OPEN;	543	req->type = EIO_OPEN;
1128	req->data = newSVsv (pathname);	544	req->sv1 = newSVsv (pathname);
1129	req->dataptr = SvPVbyte_nolen (req->data);	545	req->ptr1 = SvPVbyte_nolen (req->sv1);
1130	req->fd = flags;	546	req->int1 = flags;
1131	req->mode = mode;	547	req->int2 = mode;
1132		548
1133	REQ_SEND;	549	REQ_SEND;
1134	}	550	}
1135		551
1136	void	552	void
1137	aio_close (fh,callback=&PL_sv_undef)	553	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$	554	PROTOTYPE: $;$
1141	ALIAS:	555	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC	556	aio_fsync = EIO_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC	557	aio_fdatasync = EIO_FDATASYNC
1145	PPCODE:	558	PPCODE:
1146	{	559	{
1147	dREQ;	560	dREQ;
1148		561
1149	req->type = ix;	562	req->type = ix;
1150	req->fh = newSVsv (fh);	563	req->sv1 = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152		565
1153	REQ_SEND (req);	566	REQ_SEND (req);
1154	}	567	}
1155		568
1156	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
1157	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)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:	599	ALIAS:
1165	aio_read = REQ_READ	600	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	601	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$	602	PROTOTYPE: $$$$$;$
1168	PPCODE:	603	PPCODE:
1169	{	604	{
1170	aio_req req;
1171	STRLEN svlen;	605	STRLEN svlen;
1172	char *svptr = SvPVbyte (data, svlen);	606	char *svptr = SvPVbyte (data, svlen);
		607	UV len = SvUV (length);
1173		608
1174	SvUPGRADE (data, SVt_PV);	609	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);	610	SvPOK_on (data);
1176		611
1177	if (dataoffset < 0)	612	if (dataoffset < 0)
1178	dataoffset += svlen;	613	dataoffset += svlen;
1179		614
1180	if (dataoffset < 0 || dataoffset > svlen)	615	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	616	croak ("dataoffset outside of data scalar");
1182		617
1183	if (ix == REQ_WRITE)	618	if (ix == EIO_WRITE)
1184	{	619	{
1185	/* write: check length and adjust. */	620	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	621	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	622	len = svlen - dataoffset;
1188	}	623	}
1189	else	624	else
1190	{	625	{
1191	/* read: grow scalar as necessary */	626	/* read: grow scalar as necessary */
1192	svptr = SvGROW (data, length + dataoffset);	627	svptr = SvGROW (data, len + dataoffset + 1);
1193	}	628	}
1194		629
1195	if (length < 0)	630	if (len < 0)
1196	croak ("length must not be negative");	631	croak ("length must not be negative");
1197		632
1198	{	633	{
1199	dREQ;	634	dREQ;
1200		635
1201	req->type = ix;	636	req->type = ix;
1202	req->fh = newSVsv (fh);	637	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	638	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1204	: IoOFP (sv_2io (fh)));	639	: IoOFP (sv_2io (fh)));
		640	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	641	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	642	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	643	req->ptr2 = (char *)svptr + dataoffset;
		644	req->stroffset = dataoffset;
1209		645
1210	if (!SvREADONLY (data))	646	if (!SvREADONLY (data))
1211	{	647	{
1212	SvREADONLY_on (data);	648	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	649	req->flags |= FLAG_SV2_RO_OFF;
1214	}	650	}
1215		651
1216	REQ_SEND;	652	REQ_SEND;
1217	}	653	}
1218	}	654	}
1219		655
1220	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
1221	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)
1222	SV * out_fh
1223	SV * in_fh
1224	UV in_offset
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$	673	PROTOTYPE: $$$$;$
1228	PPCODE:	674	PPCODE:
1229	{	675	{
1230	dREQ;	676	dREQ;
1231		677
1232	req->type = REQ_SENDFILE;	678	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	679	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	680	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235	req->fh2 = newSVsv (in_fh);	681	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	682	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237	req->offset = in_offset;	683	req->offs = SvVAL64 (in_offset);
1238	req->length = length;	684	req->size = length;
1239		685
1240	REQ_SEND;	686	REQ_SEND;
1241	}	687	}
1242		688
1243	void	689	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	690	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$	691	PROTOTYPE: $$$;$
1250	PPCODE:	692	PPCODE:
1251	{	693	{
1252	dREQ;	694	dREQ;
1253		695
1254	req->type = REQ_READAHEAD;	696	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	697	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	698	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1257	req->offset = offset;	699	req->offs = SvVAL64 (offset);
1258	req->length = length;	700	req->size = length;
1259		701
1260	REQ_SEND;	702	REQ_SEND;
1261	}	703	}
1262		704
1263	void	705	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	706	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	707	ALIAS:
1268	aio_stat = REQ_STAT	708	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	709	aio_lstat = EIO_LSTAT
1270	PPCODE:	710	PPCODE:
1271	{	711	{
1272	dREQ;	712	dREQ;
1273		713
1274	New (0, req->statdata, 1, Stat_t);	714	req->sv1 = newSVsv (fh_or_path);
1275	if (!req->statdata)
1276	{
1277	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");
1279	}
1280		715
1281	if (SvPOK (fh_or_path))	716	if (SvPOK (req->sv1))
1282	{	717	{
1283	req->type = ix;	718	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);	719	req->ptr1 = SvPVbyte_nolen (req->sv1);
1286	}	720	}
1287	else	721	else
1288	{	722	{
1289	req->type = REQ_FSTAT;	723	req->type = EIO_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}	725	}
1293		726
1294	REQ_SEND;	727	REQ_SEND;
1295	}	728	}
1296		729
1297	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
1298	aio_unlink (pathname,callback=&PL_sv_undef)	828	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	829	ALIAS:
1302	aio_unlink = REQ_UNLINK	830	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	831	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	832	aio_readdir = EIO_READDIR
1305	PPCODE:	833	PPCODE:
1306	{	834	{
1307	dREQ;	835	dREQ;
1308		836
1309	req->type = ix;	837	req->type = ix;
1310	req->data = newSVsv (pathname);	838	req->sv1 = newSVsv (pathname);
1311	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);
1312		859
1313	REQ_SEND;	860	REQ_SEND;
1314	}	861	}
1315		862
1316	void	863	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	864	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:
1322	aio_link = REQ_LINK
1323	aio_symlink = REQ_SYMLINK
1324	aio_rename = REQ_RENAME
1325	PPCODE:	865	PPCODE:
1326	{	866	{
1327	dREQ;	867	dREQ;
1328		868
1329	req->type = ix;	869	req->type = EIO_MKNOD;
1330	req->fh = newSVsv (oldpath);	870	req->sv1 = newSVsv (pathname);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1332	req->data = newSVsv (newpath);	872	req->int2 = (mode_t)mode;
1333	req->dataptr = SvPVbyte_nolen (req->data);	873	req->offs = dev;
1334		874
1335	REQ_SEND;	875	REQ_SEND;
1336	}	876	}
1337		877
1338	void	878	void
1339	aio_busy (delay,callback=&PL_sv_undef)	879	aio_busy (double delay, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	880	PPCODE:
1343	{	881	{
1344	dREQ;	882	dREQ;
1345		883
1346	req->type = REQ_BUSY;	884	req->type = EIO_BUSY;
1347	req->fd = delay < 0. ? 0 : delay;	885	req->nv1 = delay < 0. ? 0. : delay;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349		886
1350	REQ_SEND;	887	REQ_SEND;
1351	}	888	}
1352		889
1353	void	890	void
1354	aio_group (callback=&PL_sv_undef)	891	aio_group (SV *callback=&PL_sv_undef)
1355	SV * callback
1356	PROTOTYPE: ;$	892	PROTOTYPE: ;$
1357	PPCODE:	893	PPCODE:
1358	{	894	{
1359	dREQ;	895	dREQ;
1360		896
1361	req->type = REQ_GROUP;	897	req->type = EIO_GROUP;
		898
1362	req_send (req);	899	eio_submit (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	900	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365	}	901	}
1366		902
1367	void	903	void
1368	aio_nop (callback=&PL_sv_undef)	904	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback	905	ALIAS:
		906	aio_nop = EIO_NOP
		907	aio_sync = EIO_SYNC
1370	PPCODE:	908	PPCODE:
1371	{	909	{
1372	dREQ;	910	dREQ;
1373		911
1374	req->type = REQ_NOP;	912	req->type = ix;
1375		913
1376	REQ_SEND;	914	REQ_SEND;
1377	}	915	}
1378		916
1379	void	917	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	918	aioreq_pri (int pri = 0)
1381	CODE:	919	PROTOTYPE: ;$
		920	CODE:
		921	RETVAL = next_pri;
		922	if (items > 0)
		923	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	924	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	925	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	926	next_pri = pri;
		927	}
		928	OUTPUT:
		929	RETVAL
1385		930
1386	void	931	void
1387	aioreq_nice (int nice = 0)	932	aioreq_nice (int nice = 0)
1388	CODE:	933	CODE:
1389	nice = next_pri - nice;	934	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	935	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	936	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	937	next_pri = nice;
1393		938
1394	void	939	void
1395	flush ()	940	flush ()
1396	PROTOTYPE:	941	PROTOTYPE:
1397	CODE:	942	CODE:
1398	while (nreqs)	943	while (eio_nreqs ())
1399	{	944	{
1400	poll_wait ();	945	poll_wait ();
1401	poll_cb ();	946	poll_cb ();
1402	}	947	}
1403		948
1404	void	949	int
1405	poll()	950	poll()
1406	PROTOTYPE:	951	PROTOTYPE:
1407	CODE:	952	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	953	poll_wait ();
1411	poll_cb ();	954	RETVAL = poll_cb ();
1412	}	955	OUTPUT:
		956	RETVAL
1413		957
1414	int	958	int
1415	poll_fileno()	959	poll_fileno()
1416	PROTOTYPE:	960	PROTOTYPE:
1417	CODE:	961	CODE:
…		…
1429		973
1430	void	974	void
1431	poll_wait()	975	poll_wait()
1432	PROTOTYPE:	976	PROTOTYPE:
1433	CODE:	977	CODE:
1434	if (nreqs)
1435	poll_wait ();	978	poll_wait ();
1436		979
1437	int	980	int
1438	nreqs()	981	nreqs()
1439	PROTOTYPE:	982	PROTOTYPE:
1440	CODE:	983	CODE:
1441	RETVAL = nreqs;	984	RETVAL = eio_nreqs ();
1442	OUTPUT:	985	OUTPUT:
1443	RETVAL	986	RETVAL
1444		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
1445	PROTOTYPES: DISABLE	1017	PROTOTYPES: DISABLE
1446		1018
1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1019	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1448		1020
1449	void	1021	void
1450	cancel (aio_req_ornot req)	1022	cancel (aio_req_ornot req)
1451	CODE:	1023	CODE:
1452	req_cancel (req);	1024	eio_cancel (req);
1453		1025
1454	void	1026	void
1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1027	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1456	CODE:	1028	CODE:
1457	SvREFCNT_dec (req->callback);	1029	SvREFCNT_dec (req->callback);
…		…
1462	void	1034	void
1463	add (aio_req grp, ...)	1035	add (aio_req grp, ...)
1464	PPCODE:	1036	PPCODE:
1465	{	1037	{
1466	int i;	1038	int i;
1467	aio_req req;
1468		1039
1469	if (grp->fd == 2)	1040	if (grp->int1 == 2)
1470	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");
1471		1042
1472	for (i = 1; i < items; ++i )	1043	for (i = 1; i < items; ++i )
1473	{	1044	{
		1045	aio_req req;
		1046
1474	if (GIMME_V != G_VOID)	1047	if (GIMME_V != G_VOID)
1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1048	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1476		1049
1477	req = SvAIO_REQ (ST (i));	1050	req = SvAIO_REQ (ST (i));
1478		1051
1479	if (req)	1052	if (req)
1480	{	1053	eio_grp_add (grp, req);
1481	++grp->length;
1482	req->grp = grp;
1483
1484	req->grp_prev = 0;
1485	req->grp_next = grp->grp_first;
1486
1487	if (grp->grp_first)
1488	grp->grp_first->grp_prev = req;
1489
1490	grp->grp_first = req;
1491	}
1492	}	1054	}
1493	}	1055	}
1494		1056
1495	void	1057	void
1496	cancel_subs (aio_req_ornot req)	1058	cancel_subs (aio_req_ornot req)
…		…
1500	void	1062	void
1501	result (aio_req grp, ...)	1063	result (aio_req grp, ...)
1502	CODE:	1064	CODE:
1503	{	1065	{
1504	int i;	1066	int i;
		1067	AV *av;
		1068
		1069	grp->errorno = errno;
		1070
1505	AV *av = newAV ();	1071	av = newAV ();
1506		1072
1507	for (i = 1; i < items; ++i )	1073	for (i = 1; i < items; ++i )
1508	av_push (av, newSVsv (ST (i)));	1074	av_push (av, newSVsv (ST (i)));
1509		1075
1510	SvREFCNT_dec (grp->data);	1076	SvREFCNT_dec (grp->sv1);
1511	grp->data = (SV *)av;	1077	grp->sv1 = (SV *)av;
1512	}	1078	}
		1079
		1080	void
		1081	errno (aio_req grp, int errorno = errno)
		1082	CODE:
		1083	grp->errorno = errorno;
1513		1084
1514	void	1085	void
1515	limit (aio_req grp, int limit)	1086	limit (aio_req grp, int limit)
1516	CODE:	1087	CODE:
1517	grp->fd2 = limit;	1088	eio_grp_limit (grp, limit);
1518	aio_grp_feed (grp);
1519		1089
1520	void	1090	void
1521	feed (aio_req grp, SV *callback=&PL_sv_undef)	1091	feed (aio_req grp, SV *callback=&PL_sv_undef)
1522	CODE:	1092	CODE:
1523	{	1093	{
1524	SvREFCNT_dec (grp->fh2);	1094	SvREFCNT_dec (grp->sv2);
1525	grp->fh2 = newSVsv (callback);	1095	grp->sv2 = newSVsv (callback);
1526		1096
1527	if (grp->fd2 <= 0)	1097	if (grp->int2 <= 0)
1528	grp->fd2 = 2;	1098	grp->int2 = 2;
1529		1099
1530	aio_grp_feed (grp);	1100	eio_grp_limit (grp, grp->int2);
1531	}	1101	}
1532		1102

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