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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC vs.
Revision 1.140 by root, Wed Jun 3 12:24:49 2009 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"
17
18	#include <pthread.h>
19
20	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
21	#include <errno.h>	11	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	12	#include <sys/types.h>
25	#include <sys/stat.h>	13	#include <sys/stat.h>
26	#include <limits.h>	14	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	15	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	16	#include <sched.h>
31		17
32	#if HAVE_SENDFILE	18	/* perl namespace pollution */
33	# if __linux	19	#undef VERSION
34	# include <sys/sendfile.h>	20
35	# elif __freebsd	21	#ifdef _WIN32
36	# include <sys/socket.h>	22
37	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
38	# elif __hpux	24	# undef malloc
39	# include <sys/socket.h>	25	# undef free
40	# elif __solaris /* not yet */	26
41	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
42	# else	59	#else
43	# error sendfile support requested but not available	60
44	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
45	#endif	68	#endif
46		69
47	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
48	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
49	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
50	#endif	83	#endif
51		84
52	#if __ia64	85	/*****************************************************************************/
53	# define STACKSIZE 65536	86
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	87	#if __GNUC__ >= 3
55	# define STACKSIZE PTHREAD_STACK_MIN	88	# define expect(expr,value) __builtin_expect ((expr),(value))
56	#else	89	#else
57	# define STACKSIZE 16384	90	# define expect(expr,value) (expr)
58	#endif	91	#endif
59		92
60	/* buffer size for various temporary buffers */	93	#define expect_false(expr) expect ((expr) != 0, 0)
61	#define AIO_BUFSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
62		95
63	#define dBUF \	96	/*****************************************************************************/
64	char *aio_buf = malloc (AIO_BUFSIZE); \
65	if (!aio_buf) \
66	return -1;
67		97
68	#define fBUF free (aio_buf)	98	static HV *stash;
69		99	typedef SV SV8; /* byte-sv, used for argument-checking */
70	enum {
71	REQ_QUIT,
72	REQ_OPEN, REQ_CLOSE,
73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
74	REQ_SENDFILE,
75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
76	REQ_FSYNC, REQ_FDATASYNC,
77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
78	REQ_READDIR,
79	REQ_LINK, REQ_SYMLINK,
80	REQ_GROUP, REQ_NOP,
81	REQ_BUSY,
82	};
83		100
84	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
85	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
86		103
87	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
88	{
89	struct aio_cb *volatile next;
90
91	SV *data, *callback;	105	SV *callback; \
92	SV *fh, *fh2;	106	SV *sv1, *sv2; \
93	void *dataptr, *data2ptr;
94	Stat_t *statdata;
95	off_t offset;
96	size_t length;
97	ssize_t result;
98
99	STRLEN dataoffset;	107	STRLEN stroffset; \
100	int type;	108	SV *self;
101	int fd, fd2;
102	int errorno;
103	mode_t mode; /* open */
104		109
105	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
106	unsigned char pri;
107		111
108	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
109	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
110	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
111		118
112	enum {	119	enum {
113	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
114	};	121	};
115		122
		123	#include "libeio/eio.c"
		124
116	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
117	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
118		127
119	enum {	128	static SV *on_next_submit;
120	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
121	PRI_MAX = 4,
122
123	DEFAULT_PRI = 0,
124	PRI_BIAS = -PRI_MIN,
125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
126	};
127
128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
129
130	static int started, wanted;
131	static volatile int nreqs;
132	static int max_outstanding = 1<<30;	130	static int max_outstanding;
133	static int respipe [2];
134		131
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140		133
141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	134	static void req_destroy (aio_req req);
142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
144
145	/*
146	* a somewhat faster data structure might be nice, but
147	* with 8 priorities this actually needs <20 insns
148	* per shift, the most expensive operation.
149	*/
150	typedef struct {
151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
152	int size;
153	} reqq;
154
155	static reqq req_queue;
156	static reqq res_queue;
157
158	int reqq_push (reqq *q, aio_req req)
159	{
160	int pri = req->pri;
161	req->next = 0;
162
163	if (q->qe[pri])
164	{
165	q->qe[pri]->next = req;
166	q->qe[pri] = req;
167	}
168	else
169	q->qe[pri] = q->qs[pri] = req;
170
171	return q->size++;
172	}
173
174	aio_req reqq_shift (reqq *q)
175	{
176	int pri;
177
178	if (!q->size)
179	return 0;
180
181	--q->size;
182
183	for (pri = NUM_PRI; pri--; )
184	{
185	aio_req req = q->qs[pri];
186
187	if (req)
188	{
189	if (!(q->qs[pri] = req->next))
190	q->qe[pri] = 0;
191
192	return req;
193	}
194	}
195
196	abort ();
197	}
198
199	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
200	static void req_free (aio_req req);	136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
201		150
202	/* must be called at most once */	151	/* must be called at most once */
203	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
204	{	153	{
205	if (!req->self)	154	if (!req->self)
…		…
223	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
224	}	173	}
225		174
226	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
227	{	176	{
228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
229	{	178	{
230	int old_len = grp->length;
231
232	if (grp->fh2 && SvOK (grp->fh2))
233	{
234	dSP;	179	dSP;
235		180
236	ENTER;	181	ENTER;
237	SAVETMPS;	182	SAVETMPS;
238	PUSHMARK (SP);	183	PUSHMARK (SP);
239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
240	PUTBACK;	185	PUTBACK;
241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
242	SPAGAIN;	187	SPAGAIN;
243	FREETMPS;	188	FREETMPS;
244	LEAVE;	189	LEAVE;
245	}
246
247	/* stop if no progress has been made */
248	if (old_len == grp->length)
249	{
250	SvREFCNT_dec (grp->fh2);
251	grp->fh2 = 0;
252	break;
253	}
254	}	190	}
255	}	191	}
256		192
257	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
258	{	194	{
259	--grp->length;	195	eio_submit (req);
260		196
261	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
262	aio_grp_feed (grp);
263
264	/* finish, if done */
265	if (!grp->length && grp->fd)
266	{	198	{
267	req_invoke (grp);	199	dSP;
268	req_free (grp);	200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
269	}	207	}
270	}	208	}
271		209
272	static void poll_wait ()	210	static int req_invoke (eio_req *req)
273	{	211	{
274	fd_set rfd;	212	dSP;
275		213
276	while (nreqs)	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
277	{	218	{
278	int size;
279	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
280	pthread_mutex_lock (&reslock);
281	#endif
282	size = res_queue.size;
283	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
284	pthread_mutex_unlock (&reslock);
285	#endif
286
287	if (size)
288	return;
289
290	FD_ZERO(&rfd);
291	FD_SET(respipe [0], &rfd);
292
293	select (respipe [0] + 1, &rfd, 0, 0, 0);
294	}
295	}
296
297	static void req_invoke (aio_req req)
298	{
299	dSP;
300
301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
302	{
303	errno = req->errorno;
304
305	ENTER;	219	ENTER;
306	SAVETMPS;	220	SAVETMPS;
307	PUSHMARK (SP);	221	PUSHMARK (SP);
308	EXTEND (SP, 1);	222	EXTEND (SP, 1);
309		223
310	switch (req->type)	224	switch (req->type)
311	{	225	{
312	case REQ_READDIR:	226	case EIO_READDIR:
313	{	227	{
314	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
315		229
316	if (req->result >= 0)	230	if (req->result >= 0)
317	{	231	{
		232	int i;
318	char *buf = req->data2ptr;	233	char *buf = req->ptr2;
319	AV *av = newAV ();	234	AV *av = newAV ();
320		235
321	while (req->result)	236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
322	{	239	{
323	SV *sv = newSVpv (buf, 0);	240	SV *sv = newSVpv (buf, 0);
324		241
325	av_push (av, sv);	242	av_store (av, i, sv);
326	buf += SvCUR (sv) + 1;	243	buf += SvCUR (sv) + 1;
327	req->result--;
328	}	244	}
329		245
330	rv = sv_2mortal (newRV_noinc ((SV *)av));	246	rv = sv_2mortal (newRV_noinc ((SV *)av));
331	}	247	}
332		248
333	PUSHs (rv);	249	PUSHs (rv);
334	}	250	}
335	break;	251	break;
336		252
337	case REQ_OPEN:	253	case EIO_OPEN:
338	{	254	{
339	/* convert fd to fh */	255	/* convert fd to fh */
340	SV *fh;	256	SV *fh = &PL_sv_undef;
341		257
342	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
343	PUTBACK;	259	{
344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
345	SPAGAIN;	261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
346		267
347	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
348		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
349	PUSHMARK (SP);	280	PUSHs (fh);
350	XPUSHs (sv_2mortal (fh));
351	}	281	}
352	break;	282	break;
353		283
354	case REQ_GROUP:	284	case EIO_GROUP:
355	req->fd = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
356		286
357	if (req->data)	287	if (req->sv1)
358	{	288	{
359	int i;	289	int i;
360	AV *av = (AV *)req->data;	290	AV *av = (AV *)req->sv1;
361		291
362	EXTEND (SP, AvFILL (av) + 1);	292	EXTEND (SP, AvFILL (av) + 1);
363	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
364	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
365	}	295	}
366	break;	296	break;
367		297
368	case REQ_NOP:	298	case EIO_NOP:
369	case REQ_BUSY:	299	case EIO_BUSY:
370	break;	300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
371		330
372	default:	331	default:
373	PUSHs (sv_2mortal (newSViv (req->result)));	332	PUSHs (sv_2mortal (newSViv (req->result)));
374	break;	333	break;
375	}	334	}
376		335
		336	errno = req->errorno;
377		337
378	PUTBACK;	338	PUTBACK;
379	call_sv (req->callback, G_VOID | G_EVAL);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
380	SPAGAIN;	340	SPAGAIN;
381		341
382	FREETMPS;	342	FREETMPS;
383	LEAVE;	343	LEAVE;
		344
		345	PUTBACK;
384	}	346	}
385		347
386	if (req->grp)	348	return !!SvTRUE (ERRSV);
387	{
388	aio_req grp = req->grp;
389
390	/* unlink request */
391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
393
394	if (grp->grp_first == req)
395	grp->grp_first = req->grp_next;
396
397	aio_grp_dec (grp);
398	}
399
400	if (SvTRUE (ERRSV))
401	{
402	req_free (req);
403	croak (0);
404	}
405	}	349	}
406		350
407	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
408	{	352	{
409	if (req->self)	353	if (req->self)
410	{	354	{
411	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
412	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
413	}	357	}
414		358
415	SvREFCNT_dec (req->data);
416	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
417	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
418	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
419	Safefree (req->statdata);
420
421	if (req->type == REQ_READDIR && req->result >= 0)
422	free (req->data2ptr);
423		362
424	Safefree (req);	363	Safefree (req);
425	}	364	}
426		365
427	static void req_cancel (aio_req req)	366	static void req_cancel_subs (aio_req grp)
428	{	367	{
429	req->flags |= FLAG_CANCELLED;	368	aio_req sub;
430		369
431	if (req->type == REQ_GROUP)	370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
		385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
432	{	401	{
433	aio_req sub;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
434		404
435	for (sub = req->grp_first; sub; sub = sub->grp_next)	405	respipe_close (respipe [0]);
436	req_cancel (sub);	406	respipe [0] = old_readfd;
437	}	407	}
438	}
439		408
		409	#ifdef _WIN32
		410	int arg = 1;
		411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
440	static int poll_cb ()	447	static int poll_cb (void)
441	{	448	{
442	dSP;
443	int count = 0;
444	int do_croak = 0;
445	aio_req req;
446
447	for (;;)	449	for (;;)
448	{	450	{
449	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
450	req = reqq_shift (&res_queue);
451		452
452	if (req)	453	if (res > 0)
453	{
454	if (!res_queue.size)
455	{
456	/* read any signals sent by the worker threads */
457	char buf [32];
458	while (read (respipe [0], buf, 32) == 32)
459	;
460	}
461	}
462
463	pthread_mutex_unlock (&reslock);
464
465	if (!req)
466	break;	454	croak (0);
467		455
468	--nreqs;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
469		458
470	if (req->type == REQ_QUIT)	459	poll_wait ();
471	started--;
472	else if (req->type == REQ_GROUP && req->length)
473	{
474	req->fd = 1; /* mark request as delayed */
475	continue;
476	}
477	else
478	{
479	if (req->type == REQ_READ)
480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
481
482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
483	SvREADONLY_off (req->data);
484
485	if (req->statdata)
486	{
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;
489	PL_statcache = *(req->statdata);
490	}
491
492	req_invoke (req);
493
494	count++;
495	}
496
497	req_free (req);
498	}	460	}
499
500	return count;
501	}	461	}
502		462
503	static void *aio_proc(void *arg);
504
505	static void start_thread (void)	463	static void atfork_child (void)
506	{	464	{
507	sigset_t fullsigset, oldsigset;	465	create_respipe ();
508	pthread_t tid;
509	pthread_attr_t attr;
510
511	pthread_attr_init (&attr);
512	pthread_attr_setstacksize (&attr, STACKSIZE);
513	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
514
515	sigfillset (&fullsigset);
516	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
517
518	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
519	started++;
520
521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
522	}	466	}
523		467
524	static void req_send (aio_req req)	468	static SV *
		469	get_cb (SV *cb_sv)
525	{	470	{
526	while (started < wanted && nreqs >= started)	471	HV *st;
527	start_thread ();	472	GV *gvp;
		473	CV *cv;
528		474
529	++nreqs;	475	if (!SvOK (cb_sv))
530
531	pthread_mutex_lock (&reqlock);
532	reqq_push (&req_queue, req);
533	pthread_cond_signal (&reqwait);
534	pthread_mutex_unlock (&reqlock);
535
536	if (nreqs > max_outstanding)
537	for (;;)
538	{
539	poll_cb ();
540
541	if (nreqs <= max_outstanding)
542	break;
543
544	poll_wait ();
545	}
546	}
547
548	static void end_thread (void)
549	{
550	aio_req req;
551
552	Newz (0, req, 1, aio_cb);
553
554	req->type = REQ_QUIT;
555	req->pri = PRI_MAX + PRI_BIAS;
556
557	req_send (req);
558	}
559
560	static void min_parallel (int nthreads)
561	{
562	if (wanted < nthreads)
563	wanted = nthreads;
564	}
565
566	static void max_parallel (int nthreads)
567	{
568	int cur = started;
569
570	if (wanted > nthreads)
571	wanted = nthreads;
572
573	while (cur > wanted)
574	{
575	end_thread ();
576	cur--;
577	}
578
579	while (started > wanted)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584	}
585
586	static void create_pipe ()
587	{
588	if (pipe (respipe))
589	croak ("unable to initialize result pipe");
590
591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593
594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
595	croak ("cannot set result pipe to nonblocking mode");
596	}
597
598	/*****************************************************************************/
599	/* work around various missing functions */
600
601	#if !HAVE_PREADWRITE
602	# define pread aio_pread
603	# define pwrite aio_pwrite
604
605	/*
606	* make our pread/pwrite safe against themselves, but not against
607	* normal read/write by using a mutex. slows down execution a lot,
608	* but that's your problem, not mine.
609	*/
610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
611
612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
613	{
614	ssize_t res;
615	off_t ooffset;
616
617	pthread_mutex_lock (&preadwritelock);
618	ooffset = lseek (fd, 0, SEEK_CUR);
619	lseek (fd, offset, SEEK_SET);
620	res = read (fd, buf, count);
621	lseek (fd, ooffset, SEEK_SET);
622	pthread_mutex_unlock (&preadwritelock);
623
624	return res;
625	}
626
627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
628	{
629	ssize_t res;
630	off_t ooffset;
631
632	pthread_mutex_lock (&preadwritelock);
633	ooffset = lseek (fd, 0, SEEK_CUR);
634	lseek (fd, offset, SEEK_SET);
635	res = write (fd, buf, count);
636	lseek (fd, offset, SEEK_SET);
637	pthread_mutex_unlock (&preadwritelock);
638
639	return res;
640	}
641	#endif
642
643	#if !HAVE_FDATASYNC
644	# define fdatasync fsync
645	#endif
646
647	#if !HAVE_READAHEAD
648	# define readahead aio_readahead
649
650	static ssize_t readahead (int fd, off_t offset, size_t count)
651	{
652	dBUF;
653
654	while (count > 0)
655	{
656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
657
658	pread (fd, aio_buf, len, offset);
659	offset += len;
660	count -= len;
661	}
662
663	fBUF;
664
665	errno = 0;
666	}
667	#endif
668
669	#if !HAVE_READDIR_R
670	# define readdir_r aio_readdir_r
671
672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
673
674	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
675	{
676	struct dirent *e;
677	int errorno;
678
679	pthread_mutex_lock (&readdirlock);
680
681	e = readdir (dirp);
682	errorno = errno;
683
684	if (e)
685	{
686	*res = ent;
687	strcpy (ent->d_name, e->d_name);
688	}
689	else
690	*res = 0;
691
692	pthread_mutex_unlock (&readdirlock);
693
694	errno = errorno;
695	return e ? 0 : -1;
696	}
697	#endif
698
699	/* sendfile always needs emulation */
700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
701	{
702	ssize_t res;
703
704	if (!count)
705	return 0;	476	return 0;
706		477
707	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
708	# if __linux
709	res = sendfile (ofd, ifd, &offset, count);
710		479
711	# elif __freebsd	480	if (!cv)
712	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
713	* Of course, the freebsd sendfile is a dire hack with no thoughts
714	* wasted on making it similar to other I/O functions.
715	*/
716	{
717	off_t sbytes;
718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
719		482
720	if (res < 0 && sbytes)	483	return (SV *)cv;
721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
722	res = sbytes;
723	}
724
725	# elif __hpux
726	res = sendfile (ofd, ifd, offset, count, 0, 0);
727
728	# elif __solaris
729	{
730	struct sendfilevec vec;
731	size_t sbytes;
732
733	vec.sfv_fd = ifd;
734	vec.sfv_flag = 0;
735	vec.sfv_off = offset;
736	vec.sfv_len = count;
737
738	res = sendfilev (ofd, &vec, 1, &sbytes);
739
740	if (res < 0 && sbytes)
741	res = sbytes;
742	}
743
744	# endif
745	#else
746	res = -1;
747	errno = ENOSYS;
748	#endif
749
750	if (res < 0
751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
752	#if __solaris
753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
754	#endif
755	)
756	)
757	{
758	/* emulate sendfile. this is a major pain in the ass */
759	dBUF;
760
761	res = 0;
762
763	while (count)
764	{
765	ssize_t cnt;
766
767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
768
769	if (cnt <= 0)
770	{
771	if (cnt && !res) res = -1;
772	break;
773	}
774
775	cnt = write (ofd, aio_buf, cnt);
776
777	if (cnt <= 0)
778	{
779	if (cnt && !res) res = -1;
780	break;
781	}
782
783	offset += cnt;
784	res += cnt;
785	count -= cnt;
786	}
787
788	fBUF;
789	}
790
791	return res;
792	}
793
794	/* read a full directory */
795	static int scandir_ (const char *path, void **namesp)
796	{
797	DIR *dirp;
798	union
799	{
800	struct dirent d;
801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
802	} *u;
803	struct dirent *entp;
804	char *name, *names;
805	int memlen = 4096;
806	int memofs = 0;
807	int res = 0;
808	int errorno;
809
810	dirp = opendir (path);
811	if (!dirp)
812	return -1;
813
814	u = malloc (sizeof (*u));
815	names = malloc (memlen);
816
817	if (u && names)
818	for (;;)
819	{
820	errno = 0;
821	readdir_r (dirp, &u->d, &entp);
822
823	if (!entp)
824	break;
825
826	name = entp->d_name;
827
828	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
829	{
830	int len = strlen (name) + 1;
831
832	res++;
833
834	while (memofs + len > memlen)
835	{
836	memlen *= 2;
837	names = realloc (names, memlen);
838	if (!names)
839	break;
840	}
841
842	memcpy (names + memofs, name, len);
843	memofs += len;
844	}
845	}
846
847	errorno = errno;
848	free (u);
849	closedir (dirp);
850
851	if (errorno)
852	{
853	free (names);
854	errno = errorno;
855	res = -1;
856	}
857
858	*namesp = (void *)names;
859	return res;
860	}
861
862	/*****************************************************************************/
863
864	static void *aio_proc (void *thr_arg)
865	{
866	aio_req req;
867	int type;
868
869	do
870	{
871	pthread_mutex_lock (&reqlock);
872
873	for (;;)
874	{
875	req = reqq_shift (&req_queue);
876
877	if (req)
878	break;
879
880	pthread_cond_wait (&reqwait, &reqlock);
881	}
882
883	pthread_mutex_unlock (&reqlock);
884
885	errno = 0; /* strictly unnecessary */
886	type = req->type; /* remember type for QUIT check */
887
888	if (!(req->flags & FLAG_CANCELLED))
889	switch (type)
890	{
891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
893
894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
896
897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
900
901	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
902	case REQ_CLOSE: req->result = close (req->fd); break;
903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
904	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
905	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
906	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
908
909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
910	case REQ_FSYNC: req->result = fsync (req->fd); break;
911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
912
913	case REQ_BUSY:
914	{
915	struct timeval tv;
916
917	tv.tv_sec = req->fd;
918	tv.tv_usec = req->fd2;
919
920	req->result = select (0, 0, 0, 0, &tv);
921	}
922
923	case REQ_GROUP:
924	case REQ_NOP:
925	case REQ_QUIT:
926	break;
927
928	default:
929	req->result = ENOSYS;
930	break;
931	}
932
933	req->errorno = errno;
934
935	pthread_mutex_lock (&reslock);
936
937	if (!reqq_push (&res_queue, req))
938	/* write a dummy byte to the pipe so fh becomes ready */
939	write (respipe [1], &respipe, 1);
940
941	pthread_mutex_unlock (&reslock);
942	}
943	while (type != REQ_QUIT);
944
945	return 0;
946	}
947
948	/*****************************************************************************/
949
950	static void atfork_prepare (void)
951	{
952	pthread_mutex_lock (&reqlock);
953	pthread_mutex_lock (&reslock);
954	#if !HAVE_PREADWRITE
955	pthread_mutex_lock (&preadwritelock);
956	#endif
957	#if !HAVE_READDIR_R
958	pthread_mutex_lock (&readdirlock);
959	#endif
960	}
961
962	static void atfork_parent (void)
963	{
964	#if !HAVE_READDIR_R
965	pthread_mutex_unlock (&readdirlock);
966	#endif
967	#if !HAVE_PREADWRITE
968	pthread_mutex_unlock (&preadwritelock);
969	#endif
970	pthread_mutex_unlock (&reslock);
971	pthread_mutex_unlock (&reqlock);
972	}
973
974	static void atfork_child (void)
975	{
976	aio_req prv;
977
978	started = 0;
979
980	while (prv = reqq_shift (&req_queue))
981	req_free (prv);
982
983	while (prv = reqq_shift (&res_queue))
984	req_free (prv);
985
986	close (respipe [0]);
987	close (respipe [1]);
988	create_pipe ();
989
990	atfork_parent ();
991	}	484	}
992		485
993	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
994	aio_req req; \	488	aio_req req; \
995	int req_pri = next_pri; \	489	int req_pri = next_pri; \
996	next_pri = DEFAULT_PRI + PRI_BIAS; \	490	next_pri = EIO_PRI_DEFAULT; \
997	\	491	\
998	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
999	croak ("callback must be undef or of reference type"); \
1000	\	493	\
1001	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
1002	if (!req) \	495	if (!req) \
1003	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
1004	\	497	\
1005	req->callback = newSVsv (callback); \	498	req->callback = SvREFCNT_inc (cb_cv); \
1006	req->pri = req_pri	499	req->pri = req_pri
1007		500
1008	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
1009	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
1010	\	505	\
1011	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1013		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
		518	}
		519
1014	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
1015		521
1016	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
1017		523
1018	BOOT:	524	BOOT:
1019	{	525	{
1020	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
		527
1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		529	newCONSTSUB (stash, "ENOSYS", newSViv (ENOSYS));
1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	530	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	531	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		532	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		533	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		534	#ifndef _WIN32
		535	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		536	#endif
		537	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		540	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1024		541
1025	create_pipe ();	542	create_respipe ();
1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1027	}
1028		543
		544	if (eio_init (want_poll, done_poll) < 0)
		545	croak ("IO::AIO: unable to initialise eio library");
		546
		547	/* atfork child called in fifo order, so before eio's handler */
		548	X_THREAD_ATFORK (0, 0, atfork_child);
		549	}
		550
1029	void	551	void
1030	min_parallel (nthreads)	552	max_poll_reqs (int nreqs)
1031	int nthreads
1032	PROTOTYPE: $	553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_poll_reqs (nreqs);
1033		556
1034	void	557	void
1035	max_parallel (nthreads)	558	max_poll_time (double nseconds)
1036	int nthreads
1037	PROTOTYPE: $	559	PROTOTYPE: $
1038
1039	int
1040	max_outstanding (nreqs)
1041	int nreqs
1042	PROTOTYPE: $
1043	CODE:	560	CODE:
1044	RETVAL = max_outstanding;	561	eio_set_max_poll_time (nseconds);
		562
		563	void
		564	min_parallel (int nthreads)
		565	PROTOTYPE: $
		566	CODE:
		567	eio_set_min_parallel (nthreads);
		568
		569	void
		570	max_parallel (int nthreads)
		571	PROTOTYPE: $
		572	CODE:
		573	eio_set_max_parallel (nthreads);
		574
		575	void
		576	max_idle (int nthreads)
		577	PROTOTYPE: $
		578	CODE:
		579	eio_set_max_idle (nthreads);
		580
		581	void
		582	max_outstanding (int maxreqs)
		583	PROTOTYPE: $
		584	CODE:
1045	max_outstanding = nreqs;	585	max_outstanding = maxreqs;
1046		586
1047	void	587	void
1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	588	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1049	SV * pathname
1050	int flags
1051	int mode
1052	SV * callback
1053	PROTOTYPE: $$$;$	589	PROTOTYPE: $$$;$
1054	PPCODE:	590	PPCODE:
1055	{	591	{
1056	dREQ;	592	dREQ;
1057		593
1058	req->type = REQ_OPEN;	594	req->type = EIO_OPEN;
1059	req->data = newSVsv (pathname);	595	req->sv1 = newSVsv (pathname);
1060	req->dataptr = SvPVbyte_nolen (req->data);	596	req->ptr1 = SvPVbyte_nolen (req->sv1);
1061	req->fd = flags;	597	req->int1 = flags;
1062	req->mode = mode;	598	req->int2 = mode;
1063		599
1064	REQ_SEND;	600	REQ_SEND;
1065	}	601	}
1066		602
1067	void	603	void
1068	aio_close (fh,callback=&PL_sv_undef)	604	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1069	SV * fh
1070	SV * callback
1071	PROTOTYPE: $;$	605	PROTOTYPE: $;$
1072	ALIAS:	606	ALIAS:
1073	aio_close = REQ_CLOSE
1074	aio_fsync = REQ_FSYNC	607	aio_fsync = EIO_FSYNC
1075	aio_fdatasync = REQ_FDATASYNC	608	aio_fdatasync = EIO_FDATASYNC
1076	PPCODE:	609	PPCODE:
1077	{	610	{
		611	int fd = extract_fd (fh, 0);
1078	dREQ;	612	dREQ;
1079		613
1080	req->type = ix;	614	req->type = ix;
1081	req->fh = newSVsv (fh);	615	req->sv1 = newSVsv (fh);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	616	req->int1 = fd;
1083		617
1084	REQ_SEND (req);	618	REQ_SEND (req);
1085	}	619	}
1086		620
1087	void	621	void
		622	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $$$$;$
		624	PPCODE:
		625	{
		626	int fd = extract_fd (fh, 0);
		627	dREQ;
		628
		629	req->type = EIO_SYNC_FILE_RANGE;
		630	req->sv1 = newSVsv (fh);
		631	req->int1 = fd;
		632	req->offs = SvVAL64 (offset);
		633	req->size = SvVAL64 (nbytes);
		634	req->int2 = flags;
		635
		636	REQ_SEND (req);
		637	}
		638
		639	void
		640	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		641	PROTOTYPE: $;$
		642	PPCODE:
		643	{
		644	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		645	int fd = extract_fd (fh, 0);
		646	dREQ;
		647
		648	if (close_pipe < 0)
		649	{
		650	int pipefd [2];
		651
		652	if (pipe (pipefd) < 0
		653	|| close (pipefd [1]) < 0
		654	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		655	abort (); /*D*/
		656
		657	close_pipe = pipefd [0];
		658	}
		659
		660	req->type = EIO_DUP2;
		661	req->int1 = close_pipe;
		662	req->sv2 = newSVsv (fh);
		663	req->int2 = fd;
		664
		665	REQ_SEND (req);
		666	}
		667
		668	void
1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	669	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1089	SV * fh
1090	UV offset
1091	UV length
1092	SV * data
1093	UV dataoffset
1094	SV * callback
1095	ALIAS:	670	ALIAS:
1096	aio_read = REQ_READ	671	aio_read = EIO_READ
1097	aio_write = REQ_WRITE	672	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$	673	PROTOTYPE: $$$$$;$
1099	PPCODE:	674	PPCODE:
1100	{	675	{
1101	aio_req req;
1102	STRLEN svlen;	676	STRLEN svlen;
		677	int fd = extract_fd (fh, ix == EIO_WRITE);
1103	char *svptr = SvPVbyte (data, svlen);	678	char *svptr = SvPVbyte (data, svlen);
1104		679	UV len = SvUV (length);
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107		680
1108	if (dataoffset < 0)	681	if (dataoffset < 0)
1109	dataoffset += svlen;	682	dataoffset += svlen;
1110		683
1111	if (dataoffset < 0 || dataoffset > svlen)	684	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("data offset outside of string");	685	croak ("dataoffset outside of data scalar");
1113		686
1114	if (ix == REQ_WRITE)	687	if (ix == EIO_WRITE)
1115	{	688	{
1116	/* write: check length and adjust. */	689	/* write: check length and adjust. */
1117	if (length < 0 || length + dataoffset > svlen)	690	if (!SvOK (length) || len + dataoffset > svlen)
1118	length = svlen - dataoffset;	691	len = svlen - dataoffset;
1119	}	692	}
1120	else	693	else
1121	{	694	{
1122	/* read: grow scalar as necessary */	695	/* read: check type and grow scalar as necessary */
		696	SvUPGRADE (data, SVt_PV);
1123	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
1124	}	698	}
1125
1126	if (length < 0)
1127	croak ("length must not be negative");
1128		699
1129	{	700	{
1130	dREQ;	701	dREQ;
1131		702
1132	req->type = ix;	703	req->type = ix;
1133	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	705	req->int1 = fd;
1135	: IoOFP (sv_2io (fh)));	706	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1136	req->offset = offset;	707	req->size = len;
1137	req->length = length;
1138	req->data = SvREFCNT_inc (data);	708	req->sv2 = SvREFCNT_inc (data);
1139	req->dataptr = (char *)svptr + dataoffset;	709	req->ptr2 = (char *)svptr + dataoffset;
		710	req->stroffset = dataoffset;
1140		711
1141	if (!SvREADONLY (data))	712	if (!SvREADONLY (data))
1142	{	713	{
1143	SvREADONLY_on (data);	714	SvREADONLY_on (data);
1144	req->data2ptr = (void *)data;	715	req->flags |= FLAG_SV2_RO_OFF;
1145	}	716	}
1146		717
1147	REQ_SEND;	718	REQ_SEND;
1148	}	719	}
1149	}	720	}
1150		721
1151	void	722	void
		723	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		724	PROTOTYPE: $$;$
		725	PPCODE:
		726	{
		727	SV *data;
		728	dREQ;
		729
		730	req->type = EIO_READLINK;
		731	req->sv1 = newSVsv (path);
		732	req->ptr1 = SvPVbyte_nolen (req->sv1);
		733
		734	REQ_SEND;
		735	}
		736
		737	void
1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	738	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1153	SV * out_fh
1154	SV * in_fh
1155	UV in_offset
1156	UV length
1157	SV * callback
1158	PROTOTYPE: $$$$;$	739	PROTOTYPE: $$$$;$
1159	PPCODE:	740	PPCODE:
1160	{	741	{
		742	int ifd = extract_fd (in_fh , 0);
		743	int ofd = extract_fd (out_fh, 0);
1161	dREQ;	744	dREQ;
1162		745
1163	req->type = REQ_SENDFILE;	746	req->type = EIO_SENDFILE;
1164	req->fh = newSVsv (out_fh);	747	req->sv1 = newSVsv (out_fh);
1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	748	req->int1 = ofd;
1166	req->fh2 = newSVsv (in_fh);	749	req->sv2 = newSVsv (in_fh);
1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	750	req->int2 = ifd;
1168	req->offset = in_offset;	751	req->offs = SvVAL64 (in_offset);
1169	req->length = length;	752	req->size = length;
1170		753
1171	REQ_SEND;	754	REQ_SEND;
1172	}	755	}
1173		756
1174	void	757	void
1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	758	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	IV length
1179	SV * callback
1180	PROTOTYPE: $$$;$	759	PROTOTYPE: $$$;$
1181	PPCODE:	760	PPCODE:
1182	{	761	{
		762	int fd = extract_fd (fh, 0);
1183	dREQ;	763	dREQ;
1184		764
1185	req->type = REQ_READAHEAD;	765	req->type = EIO_READAHEAD;
1186	req->fh = newSVsv (fh);	766	req->sv1 = newSVsv (fh);
1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	767	req->int1 = fd;
1188	req->offset = offset;	768	req->offs = SvVAL64 (offset);
1189	req->length = length;	769	req->size = length;
1190		770
1191	REQ_SEND;	771	REQ_SEND;
1192	}	772	}
1193		773
1194	void	774	void
1195	aio_stat (fh_or_path,callback=&PL_sv_undef)	775	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1196	SV * fh_or_path
1197	SV * callback
1198	ALIAS:	776	ALIAS:
1199	aio_stat = REQ_STAT	777	aio_stat = EIO_STAT
1200	aio_lstat = REQ_LSTAT	778	aio_lstat = EIO_LSTAT
1201	PPCODE:	779	PPCODE:
1202	{	780	{
1203	dREQ;	781	dREQ;
1204		782
1205	New (0, req->statdata, 1, Stat_t);	783	req->sv1 = newSVsv (fh_or_path);
1206	if (!req->statdata)
1207	{
1208	req_free (req);
1209	croak ("out of memory during aio_req->statdata allocation");
1210	}
1211		784
1212	if (SvPOK (fh_or_path))	785	if (SvPOK (req->sv1))
1213	{	786	{
1214	req->type = ix;	787	req->type = ix;
1215	req->data = newSVsv (fh_or_path);
1216	req->dataptr = SvPVbyte_nolen (req->data);	788	req->ptr1 = SvPVbyte_nolen (req->sv1);
1217	}	789	}
1218	else	790	else
1219	{	791	{
1220	req->type = REQ_FSTAT;	792	req->type = EIO_FSTAT;
1221	req->fh = newSVsv (fh_or_path);
1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	793	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1223	}	794	}
1224		795
1225	REQ_SEND;	796	REQ_SEND;
1226	}	797	}
1227		798
1228	void	799	void
		800	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		801	PPCODE:
		802	{
		803	dREQ;
		804
		805	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		806	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		807	req->sv1 = newSVsv (fh_or_path);
		808
		809	if (SvPOK (req->sv1))
		810	{
		811	req->type = EIO_UTIME;
		812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		813	}
		814	else
		815	{
		816	req->type = EIO_FUTIME;
		817	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		818	}
		819
		820	REQ_SEND;
		821	}
		822
		823	void
		824	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		825	PPCODE:
		826	{
		827	dREQ;
		828
		829	req->sv1 = newSVsv (fh_or_path);
		830	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		831
		832	if (SvPOK (req->sv1))
		833	{
		834	req->type = EIO_TRUNCATE;
		835	req->ptr1 = SvPVbyte_nolen (req->sv1);
		836	}
		837	else
		838	{
		839	req->type = EIO_FTRUNCATE;
		840	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		841	}
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_chmod = EIO_CHMOD
		850	aio_mkdir = EIO_MKDIR
		851	PPCODE:
		852	{
		853	dREQ;
		854
		855	req->int2 = mode;
		856	req->sv1 = newSVsv (fh_or_path);
		857
		858	if (SvPOK (req->sv1))
		859	{
		860	req->type = ix;
		861	req->ptr1 = SvPVbyte_nolen (req->sv1);
		862	}
		863	else
		864	{
		865	req->type = EIO_FCHMOD;
		866	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		867	}
		868
		869	REQ_SEND;
		870	}
		871
		872	void
		873	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		879	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		880	req->sv1 = newSVsv (fh_or_path);
		881
		882	if (SvPOK (req->sv1))
		883	{
		884	req->type = EIO_CHOWN;
		885	req->ptr1 = SvPVbyte_nolen (req->sv1);
		886	}
		887	else
		888	{
		889	req->type = EIO_FCHOWN;
		890	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		891	}
		892
		893	REQ_SEND;
		894	}
		895
		896	void
1229	aio_unlink (pathname,callback=&PL_sv_undef)	897	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1230	SV * pathname
1231	SV * callback
1232	ALIAS:	898	ALIAS:
1233	aio_unlink = REQ_UNLINK	899	aio_unlink = EIO_UNLINK
1234	aio_rmdir = REQ_RMDIR	900	aio_rmdir = EIO_RMDIR
1235	aio_readdir = REQ_READDIR	901	aio_readdir = EIO_READDIR
1236	PPCODE:	902	PPCODE:
1237	{	903	{
1238	dREQ;	904	dREQ;
1239		905
1240	req->type = ix;	906	req->type = ix;
1241	req->data = newSVsv (pathname);	907	req->sv1 = newSVsv (pathname);
1242	req->dataptr = SvPVbyte_nolen (req->data);	908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		915	ALIAS:
		916	aio_link = EIO_LINK
		917	aio_symlink = EIO_SYMLINK
		918	aio_rename = EIO_RENAME
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924	req->sv1 = newSVsv (oldpath);
		925	req->ptr1 = SvPVbyte_nolen (req->sv1);
		926	req->sv2 = newSVsv (newpath);
		927	req->ptr2 = SvPVbyte_nolen (req->sv2);
1243		928
1244	REQ_SEND;	929	REQ_SEND;
1245	}	930	}
1246		931
1247	void	932	void
1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)	933	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1249	SV * oldpath
1250	SV * newpath
1251	SV * callback
1252	ALIAS:
1253	aio_link = REQ_LINK
1254	aio_symlink = REQ_SYMLINK
1255	aio_rename = REQ_RENAME
1256	PPCODE:	934	PPCODE:
1257	{	935	{
1258	dREQ;	936	dREQ;
1259		937
1260	req->type = ix;	938	req->type = EIO_MKNOD;
1261	req->fh = newSVsv (oldpath);	939	req->sv1 = newSVsv (pathname);
1262	req->data2ptr = SvPVbyte_nolen (req->fh);	940	req->ptr1 = SvPVbyte_nolen (req->sv1);
1263	req->data = newSVsv (newpath);	941	req->int2 = (mode_t)mode;
1264	req->dataptr = SvPVbyte_nolen (req->data);	942	req->offs = dev;
1265		943
1266	REQ_SEND;	944	REQ_SEND;
1267	}	945	}
1268		946
1269	void	947	void
1270	aio_busy (delay,callback=&PL_sv_undef)	948	aio_busy (double delay, SV *callback=&PL_sv_undef)
1271	double delay
1272	SV * callback
1273	PPCODE:	949	PPCODE:
1274	{	950	{
1275	dREQ;	951	dREQ;
1276		952
1277	req->type = REQ_BUSY;	953	req->type = EIO_BUSY;
1278	req->fd = delay < 0. ? 0 : delay;	954	req->nv1 = delay < 0. ? 0. : delay;
1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1280		955
1281	REQ_SEND;	956	REQ_SEND;
1282	}	957	}
1283		958
1284	void	959	void
1285	aio_group (callback=&PL_sv_undef)	960	aio_group (SV *callback=&PL_sv_undef)
1286	SV * callback
1287	PROTOTYPE: ;$	961	PROTOTYPE: ;$
1288	PPCODE:	962	PPCODE:
1289	{	963	{
1290	dREQ;	964	dREQ;
1291		965
1292	req->type = REQ_GROUP;	966	req->type = EIO_GROUP;
		967
1293	req_send (req);	968	req_submit (req);
1294
1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));	969	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1296	}	970	}
1297		971
1298	void	972	void
1299	aio_nop (callback=&PL_sv_undef)	973	aio_nop (SV *callback=&PL_sv_undef)
1300	SV * callback	974	ALIAS:
		975	aio_nop = EIO_NOP
		976	aio_sync = EIO_SYNC
1301	PPCODE:	977	PPCODE:
1302	{	978	{
1303	dREQ;	979	dREQ;
1304		980
1305	req->type = REQ_NOP;	981	req->type = ix;
1306		982
1307	REQ_SEND;	983	REQ_SEND;
1308	}	984	}
1309		985
1310	void	986	int
1311	aioreq_pri (int pri = DEFAULT_PRI)	987	aioreq_pri (int pri = 0)
1312	CODE:	988	PROTOTYPE: ;$
		989	CODE:
		990	RETVAL = next_pri;
		991	if (items > 0)
		992	{
1313	if (pri < PRI_MIN) pri = PRI_MIN;	993	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1314	if (pri > PRI_MAX) pri = PRI_MAX;	994	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1315	next_pri = pri + PRI_BIAS;	995	next_pri = pri;
		996	}
		997	OUTPUT:
		998	RETVAL
1316		999
1317	void	1000	void
1318	aioreq_nice (int nice = 0)	1001	aioreq_nice (int nice = 0)
1319	CODE:	1002	CODE:
1320	nice = next_pri - nice;	1003	nice = next_pri - nice;
1321	if (nice < PRI_MIN) nice = PRI_MIN;	1004	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1322	if (nice > PRI_MAX) nice = PRI_MAX;	1005	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1323	next_pri = nice + PRI_BIAS;	1006	next_pri = nice;
1324		1007
1325	void	1008	void
1326	flush ()	1009	flush ()
1327	PROTOTYPE:	1010	PROTOTYPE:
1328	CODE:	1011	CODE:
1329	while (nreqs)	1012	while (eio_nreqs ())
1330	{	1013	{
1331	poll_wait ();	1014	poll_wait ();
1332	poll_cb ();	1015	poll_cb ();
1333	}	1016	}
1334		1017
1335	void	1018	int
1336	poll()	1019	poll()
1337	PROTOTYPE:	1020	PROTOTYPE:
1338	CODE:	1021	CODE:
1339	if (nreqs)
1340	{
1341	poll_wait ();	1022	poll_wait ();
1342	poll_cb ();	1023	RETVAL = poll_cb ();
1343	}	1024	OUTPUT:
		1025	RETVAL
1344		1026
1345	int	1027	int
1346	poll_fileno()	1028	poll_fileno()
1347	PROTOTYPE:	1029	PROTOTYPE:
1348	CODE:	1030	CODE:
…		…
1360		1042
1361	void	1043	void
1362	poll_wait()	1044	poll_wait()
1363	PROTOTYPE:	1045	PROTOTYPE:
1364	CODE:	1046	CODE:
1365	if (nreqs)
1366	poll_wait ();	1047	poll_wait ();
1367		1048
1368	int	1049	int
1369	nreqs()	1050	nreqs()
1370	PROTOTYPE:	1051	PROTOTYPE:
1371	CODE:	1052	CODE:
1372	RETVAL = nreqs;	1053	RETVAL = eio_nreqs ();
1373	OUTPUT:	1054	OUTPUT:
1374	RETVAL	1055	RETVAL
1375		1056
		1057	int
		1058	nready()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_nready ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	npending()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_npending ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	int
		1074	nthreads()
		1075	PROTOTYPE:
		1076	CODE:
		1077	RETVAL = eio_nthreads ();
		1078	OUTPUT:
		1079	RETVAL
		1080
		1081	void _on_next_submit (SV *cb)
		1082	CODE:
		1083	SvREFCNT_dec (on_next_submit);
		1084	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1085
1376	PROTOTYPES: DISABLE	1086	PROTOTYPES: DISABLE
1377		1087
1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1088	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1379		1089
1380	void	1090	void
1381	cancel (aio_req_ornot req)	1091	cancel (aio_req_ornot req)
1382	CODE:	1092	CODE:
1383	req_cancel (req);	1093	eio_cancel (req);
1384		1094
1385	void	1095	void
1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1096	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1387	CODE:	1097	PPCODE:
		1098	{
		1099	if (GIMME_V != G_VOID)
		1100	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1101
		1102	if (items > 1)
		1103	{
		1104	SV *cb_cv = get_cb (callback);
		1105
1388	SvREFCNT_dec (req->callback);	1106	SvREFCNT_dec (req->callback);
1389	req->callback = newSVsv (callback);	1107	req->callback = SvREFCNT_inc (cb_cv);
		1108	}
		1109	}
1390		1110
1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1111	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1392		1112
1393	void	1113	void
1394	add (aio_req grp, ...)	1114	add (aio_req grp, ...)
1395	PPCODE:	1115	PPCODE:
1396	{	1116	{
1397	int i;	1117	int i;
1398	aio_req req;
1399		1118
1400	if (grp->fd == 2)	1119	if (grp->int1 == 2)
1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1120	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1402		1121
1403	for (i = 1; i < items; ++i )	1122	for (i = 1; i < items; ++i )
1404	{	1123	{
		1124	aio_req req;
		1125
1405	if (GIMME_V != G_VOID)	1126	if (GIMME_V != G_VOID)
1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1127	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1407		1128
1408	req = SvAIO_REQ (ST (i));	1129	req = SvAIO_REQ (ST (i));
1409		1130
1410	if (req)	1131	if (req)
1411	{	1132	eio_grp_add (grp, req);
1412	++grp->length;
1413	req->grp = grp;
1414
1415	req->grp_prev = 0;
1416	req->grp_next = grp->grp_first;
1417
1418	if (grp->grp_first)
1419	grp->grp_first->grp_prev = req;
1420
1421	grp->grp_first = req;
1422	}	1133	}
1423	}
1424	}	1134	}
		1135
		1136	void
		1137	cancel_subs (aio_req_ornot req)
		1138	CODE:
		1139	req_cancel_subs (req);
1425		1140
1426	void	1141	void
1427	result (aio_req grp, ...)	1142	result (aio_req grp, ...)
1428	CODE:	1143	CODE:
1429	{	1144	{
1430	int i;	1145	int i;
		1146	AV *av;
		1147
		1148	grp->errorno = errno;
		1149
1431	AV *av = newAV ();	1150	av = newAV ();
1432		1151
1433	for (i = 1; i < items; ++i )	1152	for (i = 1; i < items; ++i )
1434	av_push (av, newSVsv (ST (i)));	1153	av_push (av, newSVsv (ST (i)));
1435		1154
1436	SvREFCNT_dec (grp->data);	1155	SvREFCNT_dec (grp->sv1);
1437	grp->data = (SV *)av;	1156	grp->sv1 = (SV *)av;
1438	}	1157	}
		1158
		1159	void
		1160	errno (aio_req grp, int errorno = errno)
		1161	CODE:
		1162	grp->errorno = errorno;
1439		1163
1440	void	1164	void
1441	limit (aio_req grp, int limit)	1165	limit (aio_req grp, int limit)
1442	CODE:	1166	CODE:
1443	grp->fd2 = limit;	1167	eio_grp_limit (grp, limit);
1444	aio_grp_feed (grp);
1445		1168
1446	void	1169	void
1447	feed (aio_req grp, SV *callback=&PL_sv_undef)	1170	feed (aio_req grp, SV *callback=&PL_sv_undef)
1448	CODE:	1171	CODE:
1449	{	1172	{
1450	SvREFCNT_dec (grp->fh2);	1173	SvREFCNT_dec (grp->sv2);
1451	grp->fh2 = newSVsv (callback);	1174	grp->sv2 = newSVsv (callback);
		1175	grp->feed = aio_grp_feed;
1452		1176
1453	if (grp->fd2 <= 0)	1177	if (grp->int2 <= 0)
1454	grp->fd2 = 2;	1178	grp->int2 = 2;
1455		1179
1456	aio_grp_feed (grp);	1180	eio_grp_limit (grp, grp->int2);
1457	}	1181	}
1458		1182

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