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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC vs.
Revision 1.124 by root, Thu May 29 03:20:40 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))	117	static void req_destroy (aio_req req);
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);	118	static void req_cancel (aio_req req);
244	static void req_free (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	}
245		133
246	/* must be called at most once */	134	/* must be called at most once */
247	static SV *req_sv (aio_req req, const char *klass)	135	static SV *req_sv (aio_req req, const char *klass)
248	{	136	{
249	if (!req->self)	137	if (!req->self)
…		…
267	return mg ? (aio_req)mg->mg_ptr : 0;	155	return mg ? (aio_req)mg->mg_ptr : 0;
268	}	156	}
269		157
270	static void aio_grp_feed (aio_req grp)	158	static void aio_grp_feed (aio_req grp)
271	{	159	{
272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	160	if (grp->sv2 && SvOK (grp->sv2))
273	{	161	{
274	int old_len = grp->length;
275
276	if (grp->fh2 && SvOK (grp->fh2))
277	{
278	dSP;	162	dSP;
279		163
280	ENTER;	164	ENTER;
281	SAVETMPS;	165	SAVETMPS;
282	PUSHMARK (SP);	166	PUSHMARK (SP);
283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	167	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
284	PUTBACK;	168	PUTBACK;
285	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	169	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
286	SPAGAIN;	170	SPAGAIN;
287	FREETMPS;	171	FREETMPS;
288	LEAVE;	172	LEAVE;
289	}
290
291	/* stop if no progress has been made */
292	if (old_len == grp->length)
293	{
294	SvREFCNT_dec (grp->fh2);
295	grp->fh2 = 0;
296	break;
297	}
298	}	173	}
299	}	174	}
300		175
301	static void aio_grp_dec (aio_req grp)	176	static void req_submit (eio_req *req)
302	{	177	{
303	--grp->length;	178	eio_submit (req);
304		179
305	/* call feeder, if applicable */	180	if (on_next_submit)
306	aio_grp_feed (grp);
307
308	/* finish, if done */
309	if (!grp->length && grp->fd)
310	{	181	{
311	req_invoke (grp);	182	dSP;
312	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);
313	}	190	}
314	}	191	}
315		192
316	static void poll_wait ()	193	static int req_invoke (eio_req *req)
317	{	194	{
318	fd_set rfd;	195	dSP;
319		196
320	while (nreqs)	197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
		199
		200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
321	{	201	{
322	int size;
323	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324	LOCK (reslock);
325	#endif
326	size = res_queue.size;
327	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328	UNLOCK (reslock);
329	#endif
330
331	if (size)
332	return;
333
334	FD_ZERO(&rfd);
335	FD_SET(respipe [0], &rfd);
336
337	select (respipe [0] + 1, &rfd, 0, 0, 0);
338	}
339	}
340
341	static void req_invoke (aio_req req)
342	{
343	dSP;
344
345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
346	{
347	errno = req->errorno;
348
349	ENTER;	202	ENTER;
350	SAVETMPS;	203	SAVETMPS;
351	PUSHMARK (SP);	204	PUSHMARK (SP);
352	EXTEND (SP, 1);	205	EXTEND (SP, 1);
353		206
354	switch (req->type)	207	switch (req->type)
355	{	208	{
356	case REQ_READDIR:	209	case EIO_READDIR:
357	{	210	{
358	SV *rv = &PL_sv_undef;	211	SV *rv = &PL_sv_undef;
359		212
360	if (req->result >= 0)	213	if (req->result >= 0)
361	{	214	{
362	int i;	215	int i;
363	char *buf = req->data2ptr;	216	char *buf = req->ptr2;
364	AV *av = newAV ();	217	AV *av = newAV ();
365		218
366	av_extend (av, req->result - 1);	219	av_extend (av, req->result - 1);
367		220
368	for (i = 0; i < req->result; ++i)	221	for (i = 0; i < req->result; ++i)
…		…
378		231
379	PUSHs (rv);	232	PUSHs (rv);
380	}	233	}
381	break;	234	break;
382		235
383	case REQ_OPEN:	236	case EIO_OPEN:
384	{	237	{
385	/* convert fd to fh */	238	/* convert fd to fh */
386	SV *fh;	239	SV *fh = &PL_sv_undef;
387		240
388	PUSHs (sv_2mortal (newSViv (req->result)));	241	if (req->result >= 0)
389	PUTBACK;	242	{
390	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	243	GV *gv = (GV *)sv_newmortal ();
391	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);
392		250
393	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	);
394		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
395	PUSHMARK (SP);	263	PUSHs (fh);
396	XPUSHs (sv_2mortal (fh));
397	}	264	}
398	break;	265	break;
399		266
400	case REQ_GROUP:	267	case EIO_GROUP:
401	req->fd = 2; /* mark group as finished */	268	req->int1 = 2; /* mark group as finished */
402		269
403	if (req->data)	270	if (req->sv1)
404	{	271	{
405	int i;	272	int i;
406	AV *av = (AV *)req->data;	273	AV *av = (AV *)req->sv1;
407		274
408	EXTEND (SP, AvFILL (av) + 1);	275	EXTEND (SP, AvFILL (av) + 1);
409	for (i = 0; i <= AvFILL (av); ++i)	276	for (i = 0; i <= AvFILL (av); ++i)
410	PUSHs (*av_fetch (av, i, 0));	277	PUSHs (*av_fetch (av, i, 0));
411	}	278	}
412	break;	279	break;
413		280
414	case REQ_NOP:	281	case EIO_NOP:
415	case REQ_BUSY:	282	case EIO_BUSY:
416	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 */
417		309
418	default:	310	default:
419	PUSHs (sv_2mortal (newSViv (req->result)));	311	PUSHs (sv_2mortal (newSViv (req->result)));
420	break;	312	break;
421	}	313	}
422		314
		315	errno = req->errorno;
423		316
424	PUTBACK;	317	PUTBACK;
425	call_sv (req->callback, G_VOID | G_EVAL);	318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
426	SPAGAIN;	319	SPAGAIN;
427		320
428	FREETMPS;	321	FREETMPS;
429	LEAVE;	322	LEAVE;
		323
		324	PUTBACK;
430	}	325	}
431		326
432	if (req->grp)	327	return !!SvTRUE (ERRSV);
433	{
434	aio_req grp = req->grp;
435
436	/* unlink request */
437	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
438	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
439
440	if (grp->grp_first == req)
441	grp->grp_first = req->grp_next;
442
443	aio_grp_dec (grp);
444	}
445
446	if (SvTRUE (ERRSV))
447	{
448	req_free (req);
449	croak (0);
450	}
451	}	328	}
452		329
453	static void req_free (aio_req req)	330	static void req_destroy (aio_req req)
454	{	331	{
455	if (req->self)	332	if (req->self)
456	{	333	{
457	sv_unmagic (req->self, PERL_MAGIC_ext);	334	sv_unmagic (req->self, PERL_MAGIC_ext);
458	SvREFCNT_dec (req->self);	335	SvREFCNT_dec (req->self);
459	}	336	}
460		337
461	SvREFCNT_dec (req->data);
462	SvREFCNT_dec (req->fh);	338	SvREFCNT_dec (req->sv1);
463	SvREFCNT_dec (req->fh2);	339	SvREFCNT_dec (req->sv2);
464	SvREFCNT_dec (req->callback);	340	SvREFCNT_dec (req->callback);
465	Safefree (req->statdata);
466
467	if (req->type == REQ_READDIR)
468	free (req->data2ptr);
469		341
470	Safefree (req);	342	Safefree (req);
471	}	343	}
472		344
473	static void req_cancel (aio_req req)	345	static void req_cancel_subs (aio_req grp)
474	{	346	{
475	req->flags |= FLAG_CANCELLED;	347	aio_req sub;
476		348
477	if (req->type == REQ_GROUP)	349	if (grp->type != EIO_GROUP)
		350	return;
		351
		352	SvREFCNT_dec (grp->sv2);
		353	grp->sv2 = 0;
		354
		355	eio_grp_cancel (grp);
		356	}
		357
		358	#ifdef USE_SOCKETS_AS_HANDLES
		359	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		360	#else
		361	# define TO_SOCKET(x) (x)
		362	#endif
		363
		364	static void
		365	create_respipe (void)
		366	{
		367	int old_readfd = respipe [0];
		368
		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)
478	{	380	{
479	aio_req sub;	381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		382	croak ("unable to initialize result pipe(2)");
480		383
481	for (sub = req->grp_first; sub; sub = sub->grp_next)	384	respipe_close (respipe [0]);
482	req_cancel (sub);	385	respipe [0] = old_readfd;
483	}	386	}
484	}
485		387
		388	#ifdef _WIN32
		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)");
		397
		398	respipe_osf [0] = TO_SOCKET (respipe [0]);
		399	respipe_osf [1] = TO_SOCKET (respipe [1]);
		400	}
		401
		402	static void poll_wait (void)
		403	{
		404	fd_set rfd;
		405
		406	while (eio_nreqs ())
		407	{
		408	int size;
		409
		410	X_LOCK (reslock);
		411	size = res_queue.size;
		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);
		423	}
		424	}
		425
486	static int poll_cb ()	426	static int poll_cb (void)
487	{	427	{
488	dSP;
489	int count = 0;
490	int do_croak = 0;
491	aio_req req;
492
493	for (;;)	428	for (;;)
494	{	429	{
495	LOCK (reslock);	430	int res = eio_poll ();
496	req = reqq_shift (&res_queue);
497		431
498	if (req)	432	if (res > 0)
499	{
500	if (!res_queue.size)
501	{
502	/* read any signals sent by the worker threads */
503	char buf [32];
504	while (read (respipe [0], buf, 32) == 32)
505	;
506	}
507	}
508
509	UNLOCK (reslock);
510
511	if (!req)
512	break;	433	croak (0);
513		434
514	--nreqs;	435	if (!max_outstanding || max_outstanding > eio_nreqs ())
		436	return res;
515		437
516	if (req->type == REQ_QUIT)	438	poll_wait ();
517	started--;
518	else if (req->type == REQ_GROUP && req->length)
519	{
520	req->fd = 1; /* mark request as delayed */
521	continue;
522	}
523	else
524	{
525	if (req->type == REQ_READ)
526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
527
528	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529	SvREADONLY_off (req->data);
530
531	if (req->statdata)
532	{
533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
534	PL_laststatval = req->result;
535	PL_statcache = *(req->statdata);
536	}
537
538	req_invoke (req);
539
540	count++;
541	}
542
543	req_free (req);
544	}	439	}
545
546	return count;
547	}
548
549	static void *aio_proc(void *arg);
550
551	static void start_thread (void)
552	{
553	worker *wrk = calloc (1, sizeof (worker));
554
555	if (!wrk)
556	croak ("unable to allocate worker thread data");
557
558	sigset_t fullsigset, oldsigset;
559	pthread_attr_t attr;
560
561	pthread_attr_init (&attr);
562	pthread_attr_setstacksize (&attr, STACKSIZE);
563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
564
565	sigfillset (&fullsigset);
566
567	LOCK (wrklock);
568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
569
570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
571	{
572	wrk->prev = &wrk_first;
573	wrk->next = wrk_first.next;
574	wrk_first.next->prev = wrk;
575	wrk_first.next = wrk;
576	started++;
577	}
578	else
579	free (wrk);
580
581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
582	UNLOCK (wrklock);
583	}
584
585	static void req_send (aio_req req)
586	{
587	while (started < wanted && nreqs >= started)
588	start_thread ();
589
590	++nreqs;
591
592	LOCK (reqlock);
593	reqq_push (&req_queue, req);
594	pthread_cond_signal (&reqwait);
595	UNLOCK (reqlock);
596
597	if (nreqs > max_outstanding)
598	for (;;)
599	{
600	poll_cb ();
601
602	if (nreqs <= max_outstanding)
603	break;
604
605	poll_wait ();
606	}
607	}
608
609	static void end_thread (void)
610	{
611	aio_req req;
612
613	Newz (0, req, 1, aio_cb);
614
615	req->type = REQ_QUIT;
616	req->pri = PRI_MAX + PRI_BIAS;
617
618	req_send (req);
619	}
620
621	static void min_parallel (int nthreads)
622	{
623	if (wanted < nthreads)
624	wanted = nthreads;
625	}
626
627	static void max_parallel (int nthreads)
628	{
629	int cur = started;
630
631	if (wanted > nthreads)
632	wanted = nthreads;
633
634	while (cur > wanted)
635	{
636	end_thread ();
637	cur--;
638	}
639
640	while (started > wanted)
641	{
642	poll_wait ();
643	poll_cb ();
644	}
645	}
646
647	static void create_pipe ()
648	{
649	if (pipe (respipe))
650	croak ("unable to initialize result pipe");
651
652	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
653	croak ("cannot set result pipe to nonblocking mode");
654
655	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
656	croak ("cannot set result pipe to nonblocking mode");
657	}
658
659	/*****************************************************************************/
660	/* work around various missing functions */
661
662	#if !HAVE_PREADWRITE
663	# define pread aio_pread
664	# define pwrite aio_pwrite
665
666	/*
667	* make our pread/pwrite safe against themselves, but not against
668	* normal read/write by using a mutex. slows down execution a lot,
669	* but that's your problem, not mine.
670	*/
671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
672
673	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
674	{
675	ssize_t res;
676	off_t ooffset;
677
678	LOCK (preadwritelock);
679	ooffset = lseek (fd, 0, SEEK_CUR);
680	lseek (fd, offset, SEEK_SET);
681	res = read (fd, buf, count);
682	lseek (fd, ooffset, SEEK_SET);
683	UNLOCK (preadwritelock);
684
685	return res;
686	}
687
688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
689	{
690	ssize_t res;
691	off_t ooffset;
692
693	LOCK (preadwritelock);
694	ooffset = lseek (fd, 0, SEEK_CUR);
695	lseek (fd, offset, SEEK_SET);
696	res = write (fd, buf, count);
697	lseek (fd, offset, SEEK_SET);
698	UNLOCK (preadwritelock);
699
700	return res;
701	}
702	#endif
703
704	#if !HAVE_FDATASYNC
705	# define fdatasync fsync
706	#endif
707
708	#if !HAVE_READAHEAD
709	# define readahead aio_readahead
710
711	static ssize_t readahead (int fd, off_t offset, size_t count)
712	{
713	dBUF;
714
715	while (count > 0)
716	{
717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
718
719	pread (fd, aio_buf, len, offset);
720	offset += len;
721	count -= len;
722	}
723
724	errno = 0;
725	}
726	#endif
727
728	#if !HAVE_READDIR_R
729	# define readdir_r aio_readdir_r
730
731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
732
733	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
734	{
735	struct dirent *e;
736	int errorno;
737
738	LOCK (readdirlock);
739
740	e = readdir (dirp);
741	errorno = errno;
742
743	if (e)
744	{
745	*res = ent;
746	strcpy (ent->d_name, e->d_name);
747	}
748	else
749	*res = 0;
750
751	UNLOCK (readdirlock);
752
753	errno = errorno;
754	return e ? 0 : -1;
755	}
756	#endif
757
758	/* sendfile always needs emulation */
759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
760	{
761	ssize_t res;
762
763	if (!count)
764	return 0;
765
766	#if HAVE_SENDFILE
767	# if __linux
768	res = sendfile (ofd, ifd, &offset, count);
769
770	# elif __freebsd
771	/*
772	* Of course, the freebsd sendfile is a dire hack with no thoughts
773	* wasted on making it similar to other I/O functions.
774	*/
775	{
776	off_t sbytes;
777	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778
779	if (res < 0 && sbytes)
780	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
781	res = sbytes;
782	}
783
784	# elif __hpux
785	res = sendfile (ofd, ifd, offset, count, 0, 0);
786
787	# elif __solaris
788	{
789	struct sendfilevec vec;
790	size_t sbytes;
791
792	vec.sfv_fd = ifd;
793	vec.sfv_flag = 0;
794	vec.sfv_off = offset;
795	vec.sfv_len = count;
796
797	res = sendfilev (ofd, &vec, 1, &sbytes);
798
799	if (res < 0 && sbytes)
800	res = sbytes;
801	}
802
803	# endif
804	#else
805	res = -1;
806	errno = ENOSYS;
807	#endif
808
809	if (res < 0
810	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
811	#if __solaris
812	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
813	#endif
814	)
815	)
816	{
817	/* emulate sendfile. this is a major pain in the ass */
818	dBUF;
819
820	res = 0;
821
822	while (count)
823	{
824	ssize_t cnt;
825
826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
827
828	if (cnt <= 0)
829	{
830	if (cnt && !res) res = -1;
831	break;
832	}
833
834	cnt = write (ofd, aio_buf, cnt);
835
836	if (cnt <= 0)
837	{
838	if (cnt && !res) res = -1;
839	break;
840	}
841
842	offset += cnt;
843	res += cnt;
844	count -= cnt;
845	}
846	}
847
848	return res;
849	}
850
851	/* read a full directory */
852	static void scandir_ (aio_req req, worker *self)
853	{
854	DIR *dirp;
855	union
856	{
857	struct dirent d;
858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
859	} *u;
860	struct dirent *entp;
861	char *name, *names;
862	int memlen = 4096;
863	int memofs = 0;
864	int res = 0;
865	int errorno;
866
867	LOCK (wrklock);
868	self->dirp = dirp = opendir (req->dataptr);
869	self->dbuf = u = malloc (sizeof (*u));
870	UNLOCK (wrklock);
871
872	req->data2ptr = names = malloc (memlen);
873
874	if (dirp && u && names)
875	for (;;)
876	{
877	errno = 0;
878	readdir_r (dirp, &u->d, &entp);
879
880	if (!entp)
881	break;
882
883	name = entp->d_name;
884
885	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
886	{
887	int len = strlen (name) + 1;
888
889	res++;
890
891	while (memofs + len > memlen)
892	{
893	memlen *= 2;
894	LOCK (wrklock);
895	req->data2ptr = names = realloc (names, memlen);
896	UNLOCK (wrklock);
897
898	if (!names)
899	break;
900	}
901
902	memcpy (names + memofs, name, len);
903	memofs += len;
904	}
905	}
906
907	if (errno)
908	res = -1;
909
910	req->result = res;
911	}
912
913	/*****************************************************************************/
914
915	static void *aio_proc (void *thr_arg)
916	{
917	aio_req req;
918	int type;
919	worker *self = (worker *)thr_arg;
920
921	do
922	{
923	LOCK (reqlock);
924
925	for (;;)
926	{
927	self->req = req = reqq_shift (&req_queue);
928
929	if (req)
930	break;
931
932	pthread_cond_wait (&reqwait, &reqlock);
933	}
934
935	UNLOCK (reqlock);
936
937	errno = 0; /* strictly unnecessary */
938	type = req->type; /* remember type for QUIT check */
939
940	if (!(req->flags & FLAG_CANCELLED))
941	switch (type)
942	{
943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
945
946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
948
949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
952
953	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
954	case REQ_CLOSE: req->result = close (req->fd); break;
955	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
956	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
957	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
960
961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
962	case REQ_FSYNC: req->result = fsync (req->fd); break;
963	case REQ_READDIR: scandir_ (req, self); break;
964
965	case REQ_BUSY:
966	{
967	struct timeval tv;
968
969	tv.tv_sec = req->fd;
970	tv.tv_usec = req->fd2;
971
972	req->result = select (0, 0, 0, 0, &tv);
973	}
974
975	case REQ_GROUP:
976	case REQ_NOP:
977	case REQ_QUIT:
978	break;
979
980	default:
981	req->result = ENOSYS;
982	break;
983	}
984
985	req->errorno = errno;
986
987	LOCK (reslock);
988
989	if (!reqq_push (&res_queue, req))
990	/* write a dummy byte to the pipe so fh becomes ready */
991	write (respipe [1], &respipe, 1);
992
993	self->req = 0;
994	worker_clear (self);
995
996	UNLOCK (reslock);
997	}
998	while (type != REQ_QUIT);
999
1000	LOCK (wrklock);
1001	worker_free (self);
1002	UNLOCK (wrklock);
1003
1004	return 0;
1005	}
1006
1007	/*****************************************************************************/
1008
1009	static void atfork_prepare (void)
1010	{
1011	LOCK (wrklock);
1012	LOCK (reqlock);
1013	LOCK (reslock);
1014	#if !HAVE_PREADWRITE
1015	LOCK (preadwritelock);
1016	#endif
1017	#if !HAVE_READDIR_R
1018	LOCK (readdirlock);
1019	#endif
1020	}
1021
1022	static void atfork_parent (void)
1023	{
1024	#if !HAVE_READDIR_R
1025	UNLOCK (readdirlock);
1026	#endif
1027	#if !HAVE_PREADWRITE
1028	UNLOCK (preadwritelock);
1029	#endif
1030	UNLOCK (reslock);
1031	UNLOCK (reqlock);
1032	UNLOCK (wrklock);
1033	}	440	}
1034		441
1035	static void atfork_child (void)	442	static void atfork_child (void)
1036	{	443	{
1037	aio_req prv;
1038
1039	while (prv = reqq_shift (&req_queue))
1040	req_free (prv);
1041
1042	while (prv = reqq_shift (&res_queue))
1043	req_free (prv);
1044
1045	while (wrk_first.next != &wrk_first)
1046	{
1047	worker *wrk = wrk_first.next;
1048
1049	if (wrk->req)
1050	req_free (wrk->req);
1051
1052	worker_clear (wrk);
1053	worker_free (wrk);
1054	}
1055
1056	started = 0;
1057	nreqs = 0;
1058
1059	close (respipe [0]);
1060	close (respipe [1]);
1061	create_pipe ();	444	create_respipe ();
1062
1063	atfork_parent ();
1064	}	445	}
1065		446
1066	#define dREQ \	447	#define dREQ \
1067	aio_req req; \	448	aio_req req; \
1068	int req_pri = next_pri; \	449	int req_pri = next_pri; \
1069	next_pri = DEFAULT_PRI + PRI_BIAS; \	450	next_pri = EIO_PRI_DEFAULT; \
1070	\	451	\
1071	if (SvOK (callback) && !SvROK (callback)) \	452	if (SvOK (callback) && !SvROK (callback)) \
1072	croak ("callback must be undef or of reference type"); \	453	croak ("callback must be undef or of reference type"); \
1073	\	454	\
1074	Newz (0, req, 1, aio_cb); \	455	Newz (0, req, 1, eio_req); \
1075	if (!req) \	456	if (!req) \
1076	croak ("out of memory during aio_req allocation"); \	457	croak ("out of memory during eio_req allocation"); \
1077	\	458	\
1078	req->callback = newSVsv (callback); \	459	req->callback = newSVsv (callback); \
1079	req->pri = req_pri	460	req->pri = req_pri
1080		461
1081	#define REQ_SEND \	462	#define REQ_SEND \
1082	req_send (req); \	463	req_submit (req); \
1083	\	464	\
1084	if (GIMME_V != G_VOID) \	465	if (GIMME_V != G_VOID) \
1085	XPUSHs (req_sv (req, AIO_REQ_KLASS));	466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1086		467
1087	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
1088		469
1089	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
1090		471
1091	BOOT:	472	BOOT:
1092	{	473	{
1093	HV *stash = gv_stashpv ("IO::AIO", 1);	474	stash = gv_stashpv ("IO::AIO", 1);
		475
1094	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1095	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1096	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
1097		484
1098	create_pipe ();	485	create_respipe ();
1099	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1100	}
1101		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
1102	void	494	void
1103	min_parallel (nthreads)	495	max_poll_reqs (int nreqs)
1104	int nthreads
1105	PROTOTYPE: $	496	PROTOTYPE: $
		497	CODE:
		498	eio_set_max_poll_reqs (nreqs);
1106		499
1107	void	500	void
1108	max_parallel (nthreads)	501	max_poll_time (double nseconds)
1109	int nthreads
1110	PROTOTYPE: $	502	PROTOTYPE: $
1111
1112	int
1113	max_outstanding (nreqs)
1114	int nreqs
1115	PROTOTYPE: $
1116	CODE:	503	CODE:
1117	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:
1118	max_outstanding = nreqs;	528	max_outstanding = maxreqs;
1119		529
1120	void	530	void
1121	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1122	SV * pathname
1123	int flags
1124	int mode
1125	SV * callback
1126	PROTOTYPE: $$$;$	532	PROTOTYPE: $$$;$
1127	PPCODE:	533	PPCODE:
1128	{	534	{
1129	dREQ;	535	dREQ;
1130		536
1131	req->type = REQ_OPEN;	537	req->type = EIO_OPEN;
1132	req->data = newSVsv (pathname);	538	req->sv1 = newSVsv (pathname);
1133	req->dataptr = SvPVbyte_nolen (req->data);	539	req->ptr1 = SvPVbyte_nolen (req->sv1);
1134	req->fd = flags;	540	req->int1 = flags;
1135	req->mode = mode;	541	req->int2 = mode;
1136		542
1137	REQ_SEND;	543	REQ_SEND;
1138	}	544	}
1139		545
1140	void	546	void
1141	aio_close (fh,callback=&PL_sv_undef)	547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1142	SV * fh
1143	SV * callback
1144	PROTOTYPE: $;$	548	PROTOTYPE: $;$
1145	ALIAS:	549	ALIAS:
1146	aio_close = REQ_CLOSE
1147	aio_fsync = REQ_FSYNC	550	aio_fsync = EIO_FSYNC
1148	aio_fdatasync = REQ_FDATASYNC	551	aio_fdatasync = EIO_FDATASYNC
1149	PPCODE:	552	PPCODE:
1150	{	553	{
1151	dREQ;	554	dREQ;
1152		555
1153	req->type = ix;	556	req->type = ix;
1154	req->fh = newSVsv (fh);	557	req->sv1 = newSVsv (fh);
1155	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1156		559
1157	REQ_SEND (req);	560	REQ_SEND (req);
1158	}	561	}
1159		562
1160	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
1161	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)
1162	SV * fh
1163	UV offset
1164	UV length
1165	SV * data
1166	UV dataoffset
1167	SV * callback
1168	ALIAS:	593	ALIAS:
1169	aio_read = REQ_READ	594	aio_read = EIO_READ
1170	aio_write = REQ_WRITE	595	aio_write = EIO_WRITE
1171	PROTOTYPE: $$$$$;$	596	PROTOTYPE: $$$$$;$
1172	PPCODE:	597	PPCODE:
1173	{	598	{
1174	aio_req req;
1175	STRLEN svlen;	599	STRLEN svlen;
1176	char *svptr = SvPVbyte (data, svlen);	600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
1177		602
1178	SvUPGRADE (data, SVt_PV);	603	SvUPGRADE (data, SVt_PV);
1179	SvPOK_on (data);	604	SvPOK_on (data);
1180		605
1181	if (dataoffset < 0)	606	if (dataoffset < 0)
1182	dataoffset += svlen;	607	dataoffset += svlen;
1183		608
1184	if (dataoffset < 0 || dataoffset > svlen)	609	if (dataoffset < 0 || dataoffset > svlen)
1185	croak ("data offset outside of string");	610	croak ("dataoffset outside of data scalar");
1186		611
1187	if (ix == REQ_WRITE)	612	if (ix == EIO_WRITE)
1188	{	613	{
1189	/* write: check length and adjust. */	614	/* write: check length and adjust. */
1190	if (length < 0 || length + dataoffset > svlen)	615	if (!SvOK (length) || len + dataoffset > svlen)
1191	length = svlen - dataoffset;	616	len = svlen - dataoffset;
1192	}	617	}
1193	else	618	else
1194	{	619	{
1195	/* read: grow scalar as necessary */	620	/* read: grow scalar as necessary */
1196	svptr = SvGROW (data, length + dataoffset);	621	svptr = SvGROW (data, len + dataoffset + 1);
1197	}	622	}
1198		623
1199	if (length < 0)	624	if (len < 0)
1200	croak ("length must not be negative");	625	croak ("length must not be negative");
1201		626
1202	{	627	{
1203	dREQ;	628	dREQ;
1204		629
1205	req->type = ix;	630	req->type = ix;
1206	req->fh = newSVsv (fh);	631	req->sv1 = newSVsv (fh);
1207	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1208	: IoOFP (sv_2io (fh)));	633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1209	req->offset = offset;	635	req->size = len;
1210	req->length = length;
1211	req->data = SvREFCNT_inc (data);	636	req->sv2 = SvREFCNT_inc (data);
1212	req->dataptr = (char *)svptr + dataoffset;	637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
1213		639
1214	if (!SvREADONLY (data))	640	if (!SvREADONLY (data))
1215	{	641	{
1216	SvREADONLY_on (data);	642	SvREADONLY_on (data);
1217	req->data2ptr = (void *)data;	643	req->flags |= FLAG_SV2_RO_OFF;
1218	}	644	}
1219		645
1220	REQ_SEND;	646	REQ_SEND;
1221	}	647	}
1222	}	648	}
1223		649
1224	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
1225	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)
1226	SV * out_fh
1227	SV * in_fh
1228	UV in_offset
1229	UV length
1230	SV * callback
1231	PROTOTYPE: $$$$;$	667	PROTOTYPE: $$$$;$
1232	PPCODE:	668	PPCODE:
1233	{	669	{
1234	dREQ;	670	dREQ;
1235		671
1236	req->type = REQ_SENDFILE;	672	req->type = EIO_SENDFILE;
1237	req->fh = newSVsv (out_fh);	673	req->sv1 = newSVsv (out_fh);
1238	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1239	req->fh2 = newSVsv (in_fh);	675	req->sv2 = newSVsv (in_fh);
1240	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1241	req->offset = in_offset;	677	req->offs = SvVAL64 (in_offset);
1242	req->length = length;	678	req->size = length;
1243		679
1244	REQ_SEND;	680	REQ_SEND;
1245	}	681	}
1246		682
1247	void	683	void
1248	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1249	SV * fh
1250	UV offset
1251	IV length
1252	SV * callback
1253	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
1254	PPCODE:	686	PPCODE:
1255	{	687	{
1256	dREQ;	688	dREQ;
1257		689
1258	req->type = REQ_READAHEAD;	690	req->type = EIO_READAHEAD;
1259	req->fh = newSVsv (fh);	691	req->sv1 = newSVsv (fh);
1260	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1261	req->offset = offset;	693	req->offs = SvVAL64 (offset);
1262	req->length = length;	694	req->size = length;
1263		695
1264	REQ_SEND;	696	REQ_SEND;
1265	}	697	}
1266		698
1267	void	699	void
1268	aio_stat (fh_or_path,callback=&PL_sv_undef)	700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1269	SV * fh_or_path
1270	SV * callback
1271	ALIAS:	701	ALIAS:
1272	aio_stat = REQ_STAT	702	aio_stat = EIO_STAT
1273	aio_lstat = REQ_LSTAT	703	aio_lstat = EIO_LSTAT
1274	PPCODE:	704	PPCODE:
1275	{	705	{
1276	dREQ;	706	dREQ;
1277		707
1278	New (0, req->statdata, 1, Stat_t);	708	req->sv1 = newSVsv (fh_or_path);
1279	if (!req->statdata)
1280	{
1281	req_free (req);
1282	croak ("out of memory during aio_req->statdata allocation");
1283	}
1284		709
1285	if (SvPOK (fh_or_path))	710	if (SvPOK (req->sv1))
1286	{	711	{
1287	req->type = ix;	712	req->type = ix;
1288	req->data = newSVsv (fh_or_path);
1289	req->dataptr = SvPVbyte_nolen (req->data);	713	req->ptr1 = SvPVbyte_nolen (req->sv1);
1290	}	714	}
1291	else	715	else
1292	{	716	{
1293	req->type = REQ_FSTAT;	717	req->type = EIO_FSTAT;
1294	req->fh = newSVsv (fh_or_path);
1295	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1296	}	719	}
1297		720
1298	REQ_SEND;	721	REQ_SEND;
1299	}	722	}
1300		723
1301	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
1302	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1303	SV * pathname
1304	SV * callback
1305	ALIAS:	823	ALIAS:
1306	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1307	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1308	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1309	PPCODE:	827	PPCODE:
1310	{	828	{
1311	dREQ;	829	dREQ;
1312		830
1313	req->type = ix;	831	req->type = ix;
1314	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1315	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);
1316		853
1317	REQ_SEND;	854	REQ_SEND;
1318	}	855	}
1319		856
1320	void	857	void
1321	aio_link (oldpath,newpath,callback=&PL_sv_undef)	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1322	SV * oldpath
1323	SV * newpath
1324	SV * callback
1325	ALIAS:
1326	aio_link = REQ_LINK
1327	aio_symlink = REQ_SYMLINK
1328	aio_rename = REQ_RENAME
1329	PPCODE:	859	PPCODE:
1330	{	860	{
1331	dREQ;	861	dREQ;
1332		862
1333	req->type = ix;	863	req->type = EIO_MKNOD;
1334	req->fh = newSVsv (oldpath);	864	req->sv1 = newSVsv (pathname);
1335	req->data2ptr = SvPVbyte_nolen (req->fh);	865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1336	req->data = newSVsv (newpath);	866	req->int2 = (mode_t)mode;
1337	req->dataptr = SvPVbyte_nolen (req->data);	867	req->offs = dev;
1338		868
1339	REQ_SEND;	869	REQ_SEND;
1340	}	870	}
1341		871
1342	void	872	void
1343	aio_busy (delay,callback=&PL_sv_undef)	873	aio_busy (double delay, SV *callback=&PL_sv_undef)
1344	double delay
1345	SV * callback
1346	PPCODE:	874	PPCODE:
1347	{	875	{
1348	dREQ;	876	dREQ;
1349		877
1350	req->type = REQ_BUSY;	878	req->type = EIO_BUSY;
1351	req->fd = delay < 0. ? 0 : delay;	879	req->nv1 = delay < 0. ? 0. : delay;
1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1353		880
1354	REQ_SEND;	881	REQ_SEND;
1355	}	882	}
1356		883
1357	void	884	void
1358	aio_group (callback=&PL_sv_undef)	885	aio_group (SV *callback=&PL_sv_undef)
1359	SV * callback
1360	PROTOTYPE: ;$	886	PROTOTYPE: ;$
1361	PPCODE:	887	PPCODE:
1362	{	888	{
1363	dREQ;	889	dREQ;
1364		890
1365	req->type = REQ_GROUP;	891	req->type = EIO_GROUP;
		892
1366	req_send (req);	893	eio_submit (req);
1367
1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1369	}	895	}
1370		896
1371	void	897	void
1372	aio_nop (callback=&PL_sv_undef)	898	aio_nop (SV *callback=&PL_sv_undef)
1373	SV * callback	899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
1374	PPCODE:	902	PPCODE:
1375	{	903	{
1376	dREQ;	904	dREQ;
1377		905
1378	req->type = REQ_NOP;	906	req->type = ix;
1379		907
1380	REQ_SEND;	908	REQ_SEND;
1381	}	909	}
1382		910
1383	void	911	int
1384	aioreq_pri (int pri = DEFAULT_PRI)	912	aioreq_pri (int pri = 0)
1385	CODE:	913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri;
		916	if (items > 0)
		917	{
1386	if (pri < PRI_MIN) pri = PRI_MIN;	918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1387	if (pri > PRI_MAX) pri = PRI_MAX;	919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1388	next_pri = pri + PRI_BIAS;	920	next_pri = pri;
		921	}
		922	OUTPUT:
		923	RETVAL
1389		924
1390	void	925	void
1391	aioreq_nice (int nice = 0)	926	aioreq_nice (int nice = 0)
1392	CODE:	927	CODE:
1393	nice = next_pri - nice;	928	nice = next_pri - nice;
1394	if (nice < PRI_MIN) nice = PRI_MIN;	929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1395	if (nice > PRI_MAX) nice = PRI_MAX;	930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1396	next_pri = nice + PRI_BIAS;	931	next_pri = nice;
1397		932
1398	void	933	void
1399	flush ()	934	flush ()
1400	PROTOTYPE:	935	PROTOTYPE:
1401	CODE:	936	CODE:
1402	while (nreqs)	937	while (eio_nreqs ())
1403	{	938	{
1404	poll_wait ();	939	poll_wait ();
1405	poll_cb ();	940	poll_cb ();
1406	}	941	}
1407		942
1408	void	943	int
1409	poll()	944	poll()
1410	PROTOTYPE:	945	PROTOTYPE:
1411	CODE:	946	CODE:
1412	if (nreqs)
1413	{
1414	poll_wait ();	947	poll_wait ();
1415	poll_cb ();	948	RETVAL = poll_cb ();
1416	}	949	OUTPUT:
		950	RETVAL
1417		951
1418	int	952	int
1419	poll_fileno()	953	poll_fileno()
1420	PROTOTYPE:	954	PROTOTYPE:
1421	CODE:	955	CODE:
…		…
1433		967
1434	void	968	void
1435	poll_wait()	969	poll_wait()
1436	PROTOTYPE:	970	PROTOTYPE:
1437	CODE:	971	CODE:
1438	if (nreqs)
1439	poll_wait ();	972	poll_wait ();
1440		973
1441	int	974	int
1442	nreqs()	975	nreqs()
1443	PROTOTYPE:	976	PROTOTYPE:
1444	CODE:	977	CODE:
1445	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1446	OUTPUT:	979	OUTPUT:
1447	RETVAL	980	RETVAL
1448		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
1449	PROTOTYPES: DISABLE	1011	PROTOTYPES: DISABLE
1450		1012
1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452		1014
1453	void	1015	void
1454	cancel (aio_req_ornot req)	1016	cancel (aio_req_ornot req)
1455	CODE:	1017	CODE:
1456	req_cancel (req);	1018	eio_cancel (req);
1457		1019
1458	void	1020	void
1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1460	CODE:	1022	CODE:
1461	SvREFCNT_dec (req->callback);	1023	SvREFCNT_dec (req->callback);
…		…
1466	void	1028	void
1467	add (aio_req grp, ...)	1029	add (aio_req grp, ...)
1468	PPCODE:	1030	PPCODE:
1469	{	1031	{
1470	int i;	1032	int i;
1471	aio_req req;
1472		1033
1473	if (grp->fd == 2)	1034	if (grp->int1 == 2)
1474	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");
1475		1036
1476	for (i = 1; i < items; ++i )	1037	for (i = 1; i < items; ++i )
1477	{	1038	{
		1039	aio_req req;
		1040
1478	if (GIMME_V != G_VOID)	1041	if (GIMME_V != G_VOID)
1479	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1480		1043
1481	req = SvAIO_REQ (ST (i));	1044	req = SvAIO_REQ (ST (i));
1482		1045
1483	if (req)	1046	if (req)
1484	{	1047	eio_grp_add (grp, req);
1485	++grp->length;
1486	req->grp = grp;
1487
1488	req->grp_prev = 0;
1489	req->grp_next = grp->grp_first;
1490
1491	if (grp->grp_first)
1492	grp->grp_first->grp_prev = req;
1493
1494	grp->grp_first = req;
1495	}	1048	}
1496	}
1497	}	1049	}
		1050
		1051	void
		1052	cancel_subs (aio_req_ornot req)
		1053	CODE:
		1054	req_cancel_subs (req);
1498		1055
1499	void	1056	void
1500	result (aio_req grp, ...)	1057	result (aio_req grp, ...)
1501	CODE:	1058	CODE:
1502	{	1059	{
1503	int i;	1060	int i;
		1061	AV *av;
		1062
		1063	grp->errorno = errno;
		1064
1504	AV *av = newAV ();	1065	av = newAV ();
1505		1066
1506	for (i = 1; i < items; ++i )	1067	for (i = 1; i < items; ++i )
1507	av_push (av, newSVsv (ST (i)));	1068	av_push (av, newSVsv (ST (i)));
1508		1069
1509	SvREFCNT_dec (grp->data);	1070	SvREFCNT_dec (grp->sv1);
1510	grp->data = (SV *)av;	1071	grp->sv1 = (SV *)av;
1511	}	1072	}
		1073
		1074	void
		1075	errno (aio_req grp, int errorno = errno)
		1076	CODE:
		1077	grp->errorno = errorno;
1512		1078
1513	void	1079	void
1514	limit (aio_req grp, int limit)	1080	limit (aio_req grp, int limit)
1515	CODE:	1081	CODE:
1516	grp->fd2 = limit;	1082	eio_grp_limit (grp, limit);
1517	aio_grp_feed (grp);
1518		1083
1519	void	1084	void
1520	feed (aio_req grp, SV *callback=&PL_sv_undef)	1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
1521	CODE:	1086	CODE:
1522	{	1087	{
1523	SvREFCNT_dec (grp->fh2);	1088	SvREFCNT_dec (grp->sv2);
1524	grp->fh2 = newSVsv (callback);	1089	grp->sv2 = newSVsv (callback);
1525		1090
1526	if (grp->fd2 <= 0)	1091	if (grp->int2 <= 0)
1527	grp->fd2 = 2;	1092	grp->int2 = 2;
1528		1093
1529	aio_grp_feed (grp);	1094	eio_grp_limit (grp, grp->int2);
1530	}	1095	}
1531		1096

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