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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.79 by root, Thu Oct 26 16:28:33 2006 UTC vs.
Revision 1.161 by root, Sun Jan 10 20:28:43 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK
34	# if __linux
35	# include <sys/sendfile.h>
36	# elif __freebsd
37	# include <sys/socket.h>
38	# include <sys/uio.h>	22	# include <sys/mman.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>
43	# else
44	# error sendfile support requested but not available
45	# endif	23	#endif
46	#endif
47		24
48	/* used for struct dirent, AIX doesn't provide it */	25	/* perl namespace pollution */
49	#ifndef NAME_MAX	26	#undef VERSION
50	# define NAME_MAX 4096
51	#endif
52		27
53	#ifndef PTHREAD_STACK_MIN	28	#ifdef _WIN32
54	/* care for broken platforms, e.g. windows */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57		29
58	#if __ia64	30	# define EIO_STRUCT_DIRENT Direntry_t
59	# define STACKSIZE 65536	31	# undef malloc
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	32	# undef free
61	# define STACKSIZE PTHREAD_STACK_MIN	33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
62	#else	66	#else
63	# define STACKSIZE 16384
64	#endif
65		67
66	/* wether word reads are potentially non-atomic.	68	# include <sys/time.h>
67	* this is conservatice, likely most arches this runs	69	# include <sys/select.h>
68	* on have atomic word read/writes.	70	# include <unistd.h>
69	*/	71	# include <utime.h>
70	#ifndef WORDREAD_UNSAFE	72	# include <signal.h>
71	# if __i386 || __x86_64	73	# define EIO_STRUCT_DIRENT struct dirent
72	# define WORDREAD_UNSAFE 0	74
73	# else
74	# define WORDREAD_UNSAFE 1
75	# endif	75	#endif
76	#endif
77		76
78	/* buffer size for various temporary buffers */	77	/* perl stupidly overrides readdir and maybe others */
79	#define AIO_BUFSIZE 65536	78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
80		82
81	#define dBUF \	83	#define EIO_STRUCT_STAT Stat_t
82	char *aio_buf; \	84
83	LOCK (wrklock); \	85	/* use NV for 32 bit perls as it allows larger offsets */
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	86	#if IVSIZE >= 8
85	UNLOCK (wrklock); \	87	# define VAL64 IV
86	if (!aio_buf) \	88	# define SvVAL64 SvIV
87	return -1;	89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	static int req_invoke (eio_req *req);
		184	#define EIO_FINISH(req) req_invoke (req)
		185	static void req_destroy (eio_req *grp);
		186	#define EIO_DESTROY(req) req_destroy (req)
88		187
89	enum {	188	enum {
90	REQ_QUIT,	189	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};	190	};
102		191
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	192	#include "libeio/eio.c"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"
105		193
106	typedef struct aio_cb
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;
111	SV *fh, *fh2;
112	void *dataptr, *data2ptr;
113	Stat_t *statdata;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117
118	STRLEN dataoffset;
119	int type;
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123
124	unsigned char flags;
125	unsigned char pri;
126
127	SV *self; /* the perl counterpart of this request, if any */
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
129	} aio_cb;
130
131	enum {
132	FLAG_CANCELLED = 0x01,
133	};
134
135	typedef aio_cb *aio_req;	194	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	195	typedef eio_req *aio_req_ornot;
137		196
138	enum {	197	static SV *on_next_submit;
139	PRI_MIN = -4,	198	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	199	static int max_outstanding;
141		200
142	DEFAULT_PRI = 0,	201	static s_epipe respipe;
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146		202
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150	static volatile unsigned int nreqs, nready, npending;
151	static volatile unsigned int max_outstanding = 0xffffffff;
152	static int respipe [2];
153
154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156	#else
157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158	#endif
159
160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163	/* worker threads management */
164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166	typedef struct worker {
167	/* locked by wrklock */
168	struct worker *prev, *next;
169
170	pthread_t tid;
171
172	/* locked by reslock, reqlock or wrklock */
173	aio_req req; /* currently processed request */
174	void *dbuf;
175	DIR *dirp;
176	} worker;
177
178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180	static void worker_clear (worker *wrk)
181	{
182	if (wrk->dirp)
183	{
184	closedir (wrk->dirp);
185	wrk->dirp = 0;
186	}
187
188	if (wrk->dbuf)
189	{
190	free (wrk->dbuf);
191	wrk->dbuf = 0;
192	}
193	}
194
195	static void worker_free (worker *wrk)
196	{
197	wrk->next->prev = wrk->prev;
198	wrk->prev->next = wrk->next;
199
200	free (wrk);
201	}
202
203	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
204	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
205	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
206
207	/*
208	* a somewhat faster data structure might be nice, but
209	* with 8 priorities this actually needs <20 insns
210	* per shift, the most expensive operation.
211	*/
212	typedef struct {
213	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
214	int size;
215	} reqq;
216
217	static reqq req_queue;
218	static reqq res_queue;
219
220	int reqq_push (reqq *q, aio_req req)
221	{
222	int pri = req->pri;
223	req->next = 0;
224
225	if (q->qe[pri])
226	{
227	q->qe[pri]->next = req;
228	q->qe[pri] = req;
229	}
230	else
231	q->qe[pri] = q->qs[pri] = req;
232
233	return q->size++;
234	}
235
236	aio_req reqq_shift (reqq *q)
237	{
238	int pri;
239
240	if (!q->size)
241	return 0;
242
243	--q->size;
244
245	for (pri = NUM_PRI; pri--; )
246	{
247	aio_req req = q->qs[pri];
248
249	if (req)
250	{
251	if (!(q->qs[pri] = req->next))
252	q->qe[pri] = 0;
253
254	return req;
255	}
256	}
257
258	abort ();
259	}
260
261	static int poll_cb (int max);
262	static void req_invoke (aio_req req);
263	static void req_free (aio_req req);	203	static void req_destroy (aio_req req);
264	static void req_cancel (aio_req req);	204	static void req_cancel (aio_req req);
265		205
		206	static void want_poll (void)
		207	{
		208	/* write a dummy byte to the pipe so fh becomes ready */
		209	s_epipe_signal (&respipe);
		210	}
		211
		212	static void done_poll (void)
		213	{
		214	/* read any signals sent by the worker threads */
		215	s_epipe_drain (&respipe);
		216	}
		217
266	/* must be called at most once */	218	/* must be called at most once */
267	static SV *req_sv (aio_req req, const char *klass)	219	static SV *req_sv (aio_req req, HV *stash)
268	{	220	{
269	if (!req->self)	221	if (!req->self)
270	{	222	{
271	req->self = (SV *)newHV ();	223	req->self = (SV *)newHV ();
272	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	224	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
273	}	225	}
274		226
275	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	227	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
276	}	228	}
277		229
278	static aio_req SvAIO_REQ (SV *sv)	230	static aio_req SvAIO_REQ (SV *sv)
279	{	231	{
280	MAGIC *mg;	232	MAGIC *mg;
281		233
282	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	234	if (!SvROK (sv)
		235	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		236	&& SvSTASH (SvRV (sv)) != aio_req_stash
		237	&& !sv_derived_from (sv, "IO::AIO::REQ")))
283	croak ("object of class " AIO_REQ_KLASS " expected");	238	croak ("object of class IO::AIO::REQ expected");
284		239
285	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	240	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
286		241
287	return mg ? (aio_req)mg->mg_ptr : 0;	242	return mg ? (aio_req)mg->mg_ptr : 0;
288	}	243	}
289		244
290	static void aio_grp_feed (aio_req grp)	245	static void aio_grp_feed (aio_req grp)
291	{	246	{
292	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	247	if (grp->sv2 && SvOK (grp->sv2))
293	{	248	{
294	int old_len = grp->length;
295
296	if (grp->fh2 && SvOK (grp->fh2))
297	{
298	dSP;	249	dSP;
299		250
300	ENTER;	251	ENTER;
301	SAVETMPS;	252	SAVETMPS;
302	PUSHMARK (SP);	253	PUSHMARK (SP);
303	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	254	XPUSHs (req_sv (grp, aio_grp_stash));
304	PUTBACK;	255	PUTBACK;
305	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	256	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
306	SPAGAIN;	257	SPAGAIN;
307	FREETMPS;	258	FREETMPS;
308	LEAVE;	259	LEAVE;
309	}
310
311	/* stop if no progress has been made */
312	if (old_len == grp->length)
313	{
314	SvREFCNT_dec (grp->fh2);
315	grp->fh2 = 0;
316	break;
317	}
318	}	260	}
319	}	261	}
320		262
321	static void aio_grp_dec (aio_req grp)	263	static void req_submit (eio_req *req)
322	{	264	{
323	--grp->length;	265	eio_submit (req);
324		266
325	/* call feeder, if applicable */	267	if (expect_false (on_next_submit))
326	aio_grp_feed (grp);
327
328	/* finish, if done */
329	if (!grp->length && grp->fd)
330	{	268	{
331	req_invoke (grp);	269	dSP;
332	req_free (grp);	270	SV *cb = sv_2mortal (on_next_submit);
		271
		272	on_next_submit = 0;
		273
		274	PUSHMARK (SP);
		275	PUTBACK;
		276	call_sv (cb, G_DISCARD | G_EVAL);
333	}	277	}
334	}	278	}
335		279
336	static void poll_wait ()
337	{
338	fd_set rfd;
339
340	while (nreqs)
341	{
342	int size;
343	if (WORDREAD_UNSAFE) LOCK (reslock);
344	size = res_queue.size;
345	if (WORDREAD_UNSAFE) UNLOCK (reslock);
346
347	if (size)
348	return;
349
350	FD_ZERO(&rfd);
351	FD_SET(respipe [0], &rfd);
352
353	select (respipe [0] + 1, &rfd, 0, 0, 0);
354	}
355	}
356
357	static void req_invoke (aio_req req)	280	static int req_invoke (eio_req *req)
358	{	281	{
359	dSP;	282	dSP;
360		283
361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	284	if (req->flags & FLAG_SV2_RO_OFF)
		285	SvREADONLY_off (req->sv2);
		286
		287	if (!EIO_CANCELLED (req) && req->callback)
362	{	288	{
363	ENTER;	289	ENTER;
364	SAVETMPS;	290	SAVETMPS;
365	PUSHMARK (SP);	291	PUSHMARK (SP);
366	EXTEND (SP, 1);	292	EXTEND (SP, 1);
367		293
368	switch (req->type)	294	switch (req->type)
369	{	295	{
370	case REQ_READDIR:	296	case EIO_READDIR:
371	{	297	{
372	SV *rv = &PL_sv_undef;	298	SV *rv = &PL_sv_undef;
373		299
374	if (req->result >= 0)	300	if (req->result >= 0)
375	{	301	{
376	int i;	302	int i;
377	char *buf = req->data2ptr;	303	char *names = (char *)req->ptr2;
		304	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
378	AV *av = newAV ();	305	AV *av = newAV ();
379		306
380	av_extend (av, req->result - 1);	307	av_extend (av, req->result - 1);
381		308
382	for (i = 0; i < req->result; ++i)	309	for (i = 0; i < req->result; ++i)
383	{	310	{
384	SV *sv = newSVpv (buf, 0);	311	if (req->int1 & EIO_READDIR_DENTS)
		312	{
		313	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
385		314
		315	if (req->int1 & EIO_READDIR_CUSTOM2)
		316	{
		317	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		318	AV *avent = newAV ();
		319
		320	av_extend (avent, 2);
		321
		322	if (!sv_type [ent->type])
		323	{
		324	sv_type [ent->type] = newSViv (ent->type);
		325	SvREADONLY_on (sv_type [ent->type]);
		326	}
		327
		328	av_store (avent, 0, namesv);
		329	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		330	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		331
		332	av_store (av, i, newRV_noinc ((SV *)avent));
		333	}
		334	else
386	av_store (av, i, sv);	335	av_store (av, i, namesv);
		336
		337	++ent;
		338	}
		339	else
		340	{
		341	SV *name = newSVpv (names, 0);
		342	av_store (av, i, name);
387	buf += SvCUR (sv) + 1;	343	names += SvCUR (name) + 1;
		344	}
388	}	345	}
389		346
390	rv = sv_2mortal (newRV_noinc ((SV *)av));	347	rv = sv_2mortal (newRV_noinc ((SV *)av));
391	}	348	}
392		349
393	PUSHs (rv);	350	PUSHs (rv);
		351
		352	if (req->int1 & EIO_READDIR_CUSTOM1)
		353	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
394	}	354	}
395	break;	355	break;
396		356
397	case REQ_OPEN:	357	case EIO_OPEN:
398	{	358	{
399	/* convert fd to fh */	359	/* convert fd to fh */
400	SV *fh;	360	SV *fh = &PL_sv_undef;
401		361
402	PUSHs (sv_2mortal (newSViv (req->result)));	362	if (req->result >= 0)
403	PUTBACK;	363	{
404	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	364	GV *gv = (GV *)sv_newmortal ();
405	SPAGAIN;	365	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		366	char sym [64];
		367	int symlen;
		368
		369	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		370	gv_init (gv, aio_stash, sym, symlen, 0);
406		371
407	fh = SvREFCNT_inc (POPs);	372	symlen = snprintf (
		373	sym,
		374	sizeof (sym),
		375	"%s&=%d",
		376	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		377	(int)req->result
		378	);
408		379
		380	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		381	fh = (SV *)gv;
		382	}
		383
409	PUSHMARK (SP);	384	PUSHs (fh);
410	XPUSHs (sv_2mortal (fh));
411	}	385	}
412	break;	386	break;
413		387
		388	case EIO_STATVFS:
		389	case EIO_FSTATVFS:
		390	{
		391	SV *rv = &PL_sv_undef;
		392
		393	if (req->result >= 0)
		394	{
		395	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		396	HV *hv = newHV ();
		397
		398	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		399
		400	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		401	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		402	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		403	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		404	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		405	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		406	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		407	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		408	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		409	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		410	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		411	}
		412
		413	PUSHs (rv);
		414	}
		415
		416	break;
		417
414	case REQ_GROUP:	418	case EIO_GROUP:
415	req->fd = 2; /* mark group as finished */	419	req->int1 = 2; /* mark group as finished */
416		420
417	if (req->data)	421	if (req->sv1)
418	{	422	{
419	int i;	423	int i;
420	AV *av = (AV *)req->data;	424	AV *av = (AV *)req->sv1;
421		425
422	EXTEND (SP, AvFILL (av) + 1);	426	EXTEND (SP, AvFILL (av) + 1);
423	for (i = 0; i <= AvFILL (av); ++i)	427	for (i = 0; i <= AvFILL (av); ++i)
424	PUSHs (*av_fetch (av, i, 0));	428	PUSHs (*av_fetch (av, i, 0));
425	}	429	}
426	break;	430	break;
427		431
428	case REQ_NOP:	432	case EIO_NOP:
429	case REQ_BUSY:	433	case EIO_BUSY:
430	break;	434	break;
		435
		436	case EIO_READLINK:
		437	if (req->result > 0)
		438	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		439	break;
		440
		441	case EIO_STAT:
		442	case EIO_LSTAT:
		443	case EIO_FSTAT:
		444	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		445	PL_laststatval = req->result;
		446	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		447	PUSHs (sv_2mortal (newSViv (req->result)));
		448	break;
		449
		450	case EIO_READ:
		451	{
		452	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		453	*SvEND (req->sv2) = 0;
		454	SvPOK_only (req->sv2);
		455	SvSETMAGIC (req->sv2);
		456	PUSHs (sv_2mortal (newSViv (req->result)));
		457	}
		458	break;
		459
		460	case EIO_DUP2:
		461	if (req->result > 0)
		462	req->result = 0;
		463	/* FALLTHROUGH */
431		464
432	default:	465	default:
433	PUSHs (sv_2mortal (newSViv (req->result)));	466	PUSHs (sv_2mortal (newSViv (req->result)));
434	break;	467	break;
435	}	468	}
436		469
437	errno = req->errorno;	470	errno = req->errorno;
438		471
439	PUTBACK;	472	PUTBACK;
440	call_sv (req->callback, G_VOID | G_EVAL);	473	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
441	SPAGAIN;	474	SPAGAIN;
442		475
443	FREETMPS;	476	FREETMPS;
444	LEAVE;	477	LEAVE;
		478
		479	PUTBACK;
445	}	480	}
446		481
447	if (req->grp)	482	return !!SvTRUE (ERRSV);
448	{
449	aio_req grp = req->grp;
450
451	/* unlink request */
452	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
453	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
454
455	if (grp->grp_first == req)
456	grp->grp_first = req->grp_next;
457
458	aio_grp_dec (grp);
459	}
460
461	if (SvTRUE (ERRSV))
462	{
463	req_free (req);
464	croak (0);
465	}
466	}	483	}
467		484
468	static void req_free (aio_req req)	485	static void req_destroy (aio_req req)
469	{	486	{
470	if (req->self)	487	if (req->self)
471	{	488	{
472	sv_unmagic (req->self, PERL_MAGIC_ext);	489	sv_unmagic (req->self, PERL_MAGIC_ext);
473	SvREFCNT_dec (req->self);	490	SvREFCNT_dec (req->self);
474	}	491	}
475		492
476	SvREFCNT_dec (req->data);
477	SvREFCNT_dec (req->fh);	493	SvREFCNT_dec (req->sv1);
478	SvREFCNT_dec (req->fh2);	494	SvREFCNT_dec (req->sv2);
479	SvREFCNT_dec (req->callback);	495	SvREFCNT_dec (req->callback);
480	Safefree (req->statdata);
481
482	if (req->type == REQ_READDIR)
483	free (req->data2ptr);
484		496
485	Safefree (req);	497	Safefree (req);
486	}	498	}
487		499
488	static void req_cancel_subs (aio_req grp)	500	static void req_cancel_subs (aio_req grp)
489	{	501	{
490	aio_req sub;	502	aio_req sub;
491		503
492	if (grp->type != REQ_GROUP)	504	if (grp->type != EIO_GROUP)
493	return;	505	return;
494		506
495	SvREFCNT_dec (grp->fh2);	507	SvREFCNT_dec (grp->sv2);
496	grp->fh2 = 0;	508	grp->sv2 = 0;
497		509
498	for (sub = grp->grp_first; sub; sub = sub->grp_next)	510	eio_grp_cancel (grp);
499	req_cancel (sub);
500	}	511	}
501		512
502	static void req_cancel (aio_req req)	513	static void
		514	create_respipe (void)
503	{	515	{
504	req->flags |= FLAG_CANCELLED;	516	if (s_epipe_renew (&respipe))
505		517	croak ("IO::AIO: unable to initialize result pipe");
506	req_cancel_subs (req);
507	}	518	}
508		519
		520	static void poll_wait (void)
		521	{
		522	while (eio_nreqs ())
		523	{
		524	int size;
		525
		526	X_LOCK (reslock);
		527	size = res_queue.size;
		528	X_UNLOCK (reslock);
		529
		530	if (size)
		531	return;
		532
		533	etp_maybe_start_thread ();
		534
		535	s_epipe_wait (&respipe);
		536	}
		537	}
		538
509	static int poll_cb (int max)	539	static int poll_cb (void)
510	{	540	{
511	dSP;
512	int count = 0;
513	int do_croak = 0;
514	aio_req req;
515
516	for (;;)	541	for (;;)
517	{	542	{
518	while (max <= 0 || count < max)	543	int res = eio_poll ();
519	{
520	LOCK (reslock);
521	req = reqq_shift (&res_queue);
522		544
523	if (req)	545	if (res > 0)
524	{
525	--npending;
526
527	if (!res_queue.size)
528	{
529	/* read any signals sent by the worker threads */
530	char buf [32];
531	while (read (respipe [0], buf, 32) == 32)
532	;
533	}
534	}
535
536	UNLOCK (reslock);
537
538	if (!req)
539	break;
540
541	--nreqs;
542
543	if (req->type == REQ_QUIT)
544	--started;
545	else if (req->type == REQ_GROUP && req->length)
546	{
547	req->fd = 1; /* mark request as delayed */
548	continue;
549	}
550	else
551	{
552	if (req->type == REQ_READ)
553	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
554
555	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
556	SvREADONLY_off (req->data);
557
558	if (req->statdata)
559	{
560	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
561	PL_laststatval = req->result;
562	PL_statcache = *(req->statdata);
563	}
564
565	req_invoke (req);
566
567	count++;
568	}
569
570	req_free (req);
571	}
572
573	if (nreqs <= max_outstanding)
574	break;	546	croak (0);
		547
		548	if (!max_outstanding || max_outstanding > eio_nreqs ())
		549	return res;
575		550
576	poll_wait ();	551	poll_wait ();
577
578	max = 0;
579	}	552	}
580
581	return count;
582	}
583
584	static void *aio_proc(void *arg);
585
586	static void start_thread (void)
587	{
588	sigset_t fullsigset, oldsigset;
589	pthread_attr_t attr;
590
591	worker *wrk = calloc (1, sizeof (worker));
592
593	if (!wrk)
594	croak ("unable to allocate worker thread data");
595
596	pthread_attr_init (&attr);
597	pthread_attr_setstacksize (&attr, STACKSIZE);
598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
599
600	sigfillset (&fullsigset);
601
602	LOCK (wrklock);
603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
604
605	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
606	{
607	wrk->prev = &wrk_first;
608	wrk->next = wrk_first.next;
609	wrk_first.next->prev = wrk;
610	wrk_first.next = wrk;
611	++started;
612	}
613	else
614	free (wrk);
615
616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
617	UNLOCK (wrklock);
618	}
619
620	static void req_send (aio_req req)
621	{
622	while (started < wanted && nreqs >= started)
623	start_thread ();
624
625	++nreqs;
626
627	LOCK (reqlock);
628	++nready;
629	reqq_push (&req_queue, req);
630	pthread_cond_signal (&reqwait);
631	UNLOCK (reqlock);
632	}
633
634	static void end_thread (void)
635	{
636	aio_req req;
637
638	Newz (0, req, 1, aio_cb);
639
640	req->type = REQ_QUIT;
641	req->pri = PRI_MAX + PRI_BIAS;
642
643	req_send (req);
644	}
645
646	static void min_parallel (int nthreads)
647	{
648	if (wanted < nthreads)
649	wanted = nthreads;
650	}
651
652	static void max_parallel (int nthreads)
653	{
654	int cur = started;
655
656	if (wanted > nthreads)
657	wanted = nthreads;
658
659	while (cur > wanted)
660	{
661	end_thread ();
662	cur--;
663	}
664
665	while (started > wanted)
666	{
667	poll_wait ();
668	poll_cb (0);
669	}
670	}
671
672	static void create_pipe ()
673	{
674	if (pipe (respipe))
675	croak ("unable to initialize result pipe");
676
677	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
678	croak ("cannot set result pipe to nonblocking mode");
679
680	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
681	croak ("cannot set result pipe to nonblocking mode");
682	}
683
684	/*****************************************************************************/
685	/* work around various missing functions */
686
687	#if !HAVE_PREADWRITE
688	# define pread aio_pread
689	# define pwrite aio_pwrite
690
691	/*
692	* make our pread/pwrite safe against themselves, but not against
693	* normal read/write by using a mutex. slows down execution a lot,
694	* but that's your problem, not mine.
695	*/
696	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
697
698	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
699	{
700	ssize_t res;
701	off_t ooffset;
702
703	LOCK (preadwritelock);
704	ooffset = lseek (fd, 0, SEEK_CUR);
705	lseek (fd, offset, SEEK_SET);
706	res = read (fd, buf, count);
707	lseek (fd, ooffset, SEEK_SET);
708	UNLOCK (preadwritelock);
709
710	return res;
711	}
712
713	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
714	{
715	ssize_t res;
716	off_t ooffset;
717
718	LOCK (preadwritelock);
719	ooffset = lseek (fd, 0, SEEK_CUR);
720	lseek (fd, offset, SEEK_SET);
721	res = write (fd, buf, count);
722	lseek (fd, offset, SEEK_SET);
723	UNLOCK (preadwritelock);
724
725	return res;
726	}
727	#endif
728
729	#if !HAVE_FDATASYNC
730	# define fdatasync fsync
731	#endif
732
733	#if !HAVE_READAHEAD
734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
735
736	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
737	{
738	dBUF;
739
740	while (count > 0)
741	{
742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
743
744	pread (fd, aio_buf, len, offset);
745	offset += len;
746	count -= len;
747	}
748
749	errno = 0;
750	}
751
752	#endif
753
754	#if !HAVE_READDIR_R
755	# define readdir_r aio_readdir_r
756
757	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
758
759	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
760	{
761	struct dirent *e;
762	int errorno;
763
764	LOCK (readdirlock);
765
766	e = readdir (dirp);
767	errorno = errno;
768
769	if (e)
770	{
771	*res = ent;
772	strcpy (ent->d_name, e->d_name);
773	}
774	else
775	*res = 0;
776
777	UNLOCK (readdirlock);
778
779	errno = errorno;
780	return e ? 0 : -1;
781	}
782	#endif
783
784	/* sendfile always needs emulation */
785	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
786	{
787	ssize_t res;
788
789	if (!count)
790	return 0;
791
792	#if HAVE_SENDFILE
793	# if __linux
794	res = sendfile (ofd, ifd, &offset, count);
795
796	# elif __freebsd
797	/*
798	* Of course, the freebsd sendfile is a dire hack with no thoughts
799	* wasted on making it similar to other I/O functions.
800	*/
801	{
802	off_t sbytes;
803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
804
805	if (res < 0 && sbytes)
806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
807	res = sbytes;
808	}
809
810	# elif __hpux
811	res = sendfile (ofd, ifd, offset, count, 0, 0);
812
813	# elif __solaris
814	{
815	struct sendfilevec vec;
816	size_t sbytes;
817
818	vec.sfv_fd = ifd;
819	vec.sfv_flag = 0;
820	vec.sfv_off = offset;
821	vec.sfv_len = count;
822
823	res = sendfilev (ofd, &vec, 1, &sbytes);
824
825	if (res < 0 && sbytes)
826	res = sbytes;
827	}
828
829	# endif
830	#else
831	res = -1;
832	errno = ENOSYS;
833	#endif
834
835	if (res < 0
836	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
837	#if __solaris
838	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
839	#endif
840	)
841	)
842	{
843	/* emulate sendfile. this is a major pain in the ass */
844	dBUF;
845
846	res = 0;
847
848	while (count)
849	{
850	ssize_t cnt;
851
852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
853
854	if (cnt <= 0)
855	{
856	if (cnt && !res) res = -1;
857	break;
858	}
859
860	cnt = write (ofd, aio_buf, cnt);
861
862	if (cnt <= 0)
863	{
864	if (cnt && !res) res = -1;
865	break;
866	}
867
868	offset += cnt;
869	res += cnt;
870	count -= cnt;
871	}
872	}
873
874	return res;
875	}
876
877	/* read a full directory */
878	static void scandir_ (aio_req req, worker *self)
879	{
880	DIR *dirp;
881	union
882	{
883	struct dirent d;
884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
885	} *u;
886	struct dirent *entp;
887	char *name, *names;
888	int memlen = 4096;
889	int memofs = 0;
890	int res = 0;
891	int errorno;
892
893	LOCK (wrklock);
894	self->dirp = dirp = opendir (req->dataptr);
895	self->dbuf = u = malloc (sizeof (*u));
896	req->data2ptr = names = malloc (memlen);
897	UNLOCK (wrklock);
898
899	if (dirp && u && names)
900	for (;;)
901	{
902	errno = 0;
903	readdir_r (dirp, &u->d, &entp);
904
905	if (!entp)
906	break;
907
908	name = entp->d_name;
909
910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
911	{
912	int len = strlen (name) + 1;
913
914	res++;
915
916	while (memofs + len > memlen)
917	{
918	memlen *= 2;
919	LOCK (wrklock);
920	req->data2ptr = names = realloc (names, memlen);
921	UNLOCK (wrklock);
922
923	if (!names)
924	break;
925	}
926
927	memcpy (names + memofs, name, len);
928	memofs += len;
929	}
930	}
931
932	if (errno)
933	res = -1;
934
935	req->result = res;
936	}
937
938	/*****************************************************************************/
939
940	static void *aio_proc (void *thr_arg)
941	{
942	aio_req req;
943	int type;
944	worker *self = (worker *)thr_arg;
945
946	do
947	{
948	LOCK (reqlock);
949
950	for (;;)
951	{
952	self->req = req = reqq_shift (&req_queue);
953
954	if (req)
955	break;
956
957	pthread_cond_wait (&reqwait, &reqlock);
958	}
959
960	--nready;
961
962	UNLOCK (reqlock);
963
964	errno = 0; /* strictly unnecessary */
965	type = req->type; /* remember type for QUIT check */
966
967	if (!(req->flags & FLAG_CANCELLED))
968	switch (type)
969	{
970	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
971	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
972
973	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
974	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
975
976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
979
980	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
981	case REQ_CLOSE: req->result = close (req->fd); break;
982	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
983	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
984	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
987
988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
989	case REQ_FSYNC: req->result = fsync (req->fd); break;
990	case REQ_READDIR: scandir_ (req, self); break;
991
992	case REQ_BUSY:
993	{
994	struct timeval tv;
995
996	tv.tv_sec = req->fd;
997	tv.tv_usec = req->fd2;
998
999	req->result = select (0, 0, 0, 0, &tv);
1000	}
1001
1002	case REQ_GROUP:
1003	case REQ_NOP:
1004	case REQ_QUIT:
1005	break;
1006
1007	default:
1008	req->result = ENOSYS;
1009	break;
1010	}
1011
1012	req->errorno = errno;
1013
1014	LOCK (reslock);
1015
1016	++npending;
1017
1018	if (!reqq_push (&res_queue, req))
1019	/* write a dummy byte to the pipe so fh becomes ready */
1020	write (respipe [1], &respipe, 1);
1021
1022	self->req = 0;
1023	worker_clear (self);
1024
1025	UNLOCK (reslock);
1026	}
1027	while (type != REQ_QUIT);
1028
1029	LOCK (wrklock);
1030	worker_free (self);
1031	UNLOCK (wrklock);
1032
1033	return 0;
1034	}
1035
1036	/*****************************************************************************/
1037
1038	static void atfork_prepare (void)
1039	{
1040	LOCK (wrklock);
1041	LOCK (reqlock);
1042	LOCK (reslock);
1043	#if !HAVE_PREADWRITE
1044	LOCK (preadwritelock);
1045	#endif
1046	#if !HAVE_READDIR_R
1047	LOCK (readdirlock);
1048	#endif
1049	}
1050
1051	static void atfork_parent (void)
1052	{
1053	#if !HAVE_READDIR_R
1054	UNLOCK (readdirlock);
1055	#endif
1056	#if !HAVE_PREADWRITE
1057	UNLOCK (preadwritelock);
1058	#endif
1059	UNLOCK (reslock);
1060	UNLOCK (reqlock);
1061	UNLOCK (wrklock);
1062	}	553	}
1063		554
1064	static void atfork_child (void)	555	static void atfork_child (void)
1065	{	556	{
1066	aio_req prv;
1067
1068	while (prv = reqq_shift (&req_queue))
1069	req_free (prv);
1070
1071	while (prv = reqq_shift (&res_queue))
1072	req_free (prv);
1073
1074	while (wrk_first.next != &wrk_first)
1075	{
1076	worker *wrk = wrk_first.next;
1077
1078	if (wrk->req)
1079	req_free (wrk->req);
1080
1081	worker_clear (wrk);
1082	worker_free (wrk);
1083	}
1084
1085	started = 0;
1086	nreqs = 0;
1087
1088	close (respipe [0]);
1089	close (respipe [1]);
1090	create_pipe ();	557	create_respipe ();
		558	}
1091		559
1092	atfork_parent ();	560	static SV *
		561	get_cb (SV *cb_sv)
		562	{
		563	SvGETMAGIC (cb_sv);
		564	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1093	}	565	}
1094		566
1095	#define dREQ \	567	#define dREQ \
		568	SV *cb_cv; \
1096	aio_req req; \	569	aio_req req; \
1097	int req_pri = next_pri; \	570	int req_pri = next_pri; \
1098	next_pri = DEFAULT_PRI + PRI_BIAS; \	571	next_pri = EIO_PRI_DEFAULT; \
1099	\	572	\
1100	if (SvOK (callback) && !SvROK (callback)) \	573	cb_cv = get_cb (callback); \
1101	croak ("callback must be undef or of reference type"); \
1102	\	574	\
1103	Newz (0, req, 1, aio_cb); \	575	Newz (0, req, 1, eio_req); \
1104	if (!req) \	576	if (!req) \
1105	croak ("out of memory during aio_req allocation"); \	577	croak ("out of memory during eio_req allocation"); \
1106	\	578	\
1107	req->callback = newSVsv (callback); \	579	req->callback = SvREFCNT_inc (cb_cv); \
1108	req->pri = req_pri	580	req->pri = req_pri
1109		581
1110	#define REQ_SEND \	582	#define REQ_SEND \
		583	PUTBACK; \
1111	req_send (req); \	584	req_submit (req); \
		585	SPAGAIN; \
1112	\	586	\
1113	if (GIMME_V != G_VOID) \	587	if (GIMME_V != G_VOID) \
1114	XPUSHs (req_sv (req, AIO_REQ_KLASS));	588	XPUSHs (req_sv (req, aio_req_stash));
1115		589
1116	MODULE = IO::AIO PACKAGE = IO::AIO	590	MODULE = IO::AIO PACKAGE = IO::AIO
1117		591
1118	PROTOTYPES: ENABLE	592	PROTOTYPES: ENABLE
1119		593
1120	BOOT:	594	BOOT:
1121	{	595	{
		596	static const struct {
		597	const char *name;
		598	IV iv;
		599	} *civ, const_iv[] = {
		600	# define const_iv(name, value) { # name, (IV) value },
		601	# define const_eio(name) { # name, (IV) EIO_ ## name },
		602	const_iv (EXDEV , EXDEV)
		603	const_iv (ENOSYS , ENOSYS)
		604	const_iv (O_RDONLY, O_RDONLY)
		605	const_iv (O_WRONLY, O_WRONLY)
		606	const_iv (O_CREAT , O_CREAT)
		607	const_iv (O_TRUNC , O_TRUNC)
		608	#ifndef _WIN32
		609	const_iv (S_IFIFO , S_IFIFO)
		610	#endif
		611	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		612	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		613	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		614	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		615	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		616	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		617
		618	const_iv (ST_RDONLY , ST_RDONLY)
		619	const_iv (ST_NOSUID , ST_NOSUID)
		620	const_iv (ST_NODEV , ST_NODEV)
		621	const_iv (ST_NOEXEC , ST_NOEXEC)
		622	const_iv (ST_SYNCHRONOUS , ST_SYNCHRONOUS)
		623	const_iv (ST_MANDLOCK , ST_MANDLOCK)
		624	const_iv (ST_WRITE , ST_WRITE)
		625	const_iv (ST_APPEND , ST_APPEND)
		626	const_iv (ST_IMMUTABLE , ST_IMMUTABLE)
		627	const_iv (ST_NOATIME , ST_NOATIME)
		628	const_iv (ST_NODIRATIME , ST_NODIRATIME)
		629	const_iv (ST_RELATIME , ST_RELATIME)
		630
		631	const_iv (MCL_FUTURE , MCL_FUTURE)
		632	const_iv (MCL_CURRENT , MCL_CURRENT)
		633
		634	const_eio (MS_ASYNC)
		635	const_eio (MS_INVALIDATE)
		636	const_eio (MS_SYNC)
		637
		638	const_eio (MT_MODIFY)
		639
		640	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		641	const_eio (SYNC_FILE_RANGE_WRITE)
		642	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		643
		644	const_eio (READDIR_DENTS)
		645	const_eio (READDIR_DIRS_FIRST)
		646	const_eio (READDIR_STAT_ORDER)
		647	const_eio (READDIR_FOUND_UNKNOWN)
		648
		649	const_eio (DT_UNKNOWN)
		650	const_eio (DT_FIFO)
		651	const_eio (DT_CHR)
		652	const_eio (DT_DIR)
		653	const_eio (DT_BLK)
		654	const_eio (DT_REG)
		655	const_eio (DT_LNK)
		656	const_eio (DT_SOCK)
		657	const_eio (DT_WHT)
		658	};
		659
1122	HV *stash = gv_stashpv ("IO::AIO", 1);	660	aio_stash = gv_stashpv ("IO::AIO" , 1);
1123	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	661	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1124	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	662	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1125	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1126		663
		664	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		665	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		666
1127	create_pipe ();	667	create_respipe ();
1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	668
		669	if (eio_init (want_poll, done_poll) < 0)
		670	croak ("IO::AIO: unable to initialise eio library");
		671
		672	/* atfork child called in fifo order, so before eio's handler */
		673	X_THREAD_ATFORK (0, 0, atfork_child);
1129	}	674	}
		675
		676	void
		677	max_poll_reqs (int nreqs)
		678	PROTOTYPE: $
		679	CODE:
		680	eio_set_max_poll_reqs (nreqs);
		681
		682	void
		683	max_poll_time (double nseconds)
		684	PROTOTYPE: $
		685	CODE:
		686	eio_set_max_poll_time (nseconds);
1130		687
1131	void	688	void
1132	min_parallel (int nthreads)	689	min_parallel (int nthreads)
1133	PROTOTYPE: $	690	PROTOTYPE: $
		691	CODE:
		692	eio_set_min_parallel (nthreads);
1134		693
1135	void	694	void
1136	max_parallel (int nthreads)	695	max_parallel (int nthreads)
1137	PROTOTYPE: $	696	PROTOTYPE: $
		697	CODE:
		698	eio_set_max_parallel (nthreads);
1138		699
1139	int	700	void
		701	max_idle (int nthreads)
		702	PROTOTYPE: $
		703	CODE:
		704	eio_set_max_idle (nthreads);
		705
		706	void
1140	max_outstanding (int maxreqs)	707	max_outstanding (int maxreqs)
1141	PROTOTYPE: $	708	PROTOTYPE: $
1142	CODE:	709	CODE:
1143	RETVAL = max_outstanding;
1144	max_outstanding = maxreqs;	710	max_outstanding = maxreqs;
1145	OUTPUT:
1146	RETVAL
1147		711
1148	void	712	void
1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	713	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1150	SV * pathname
1151	int flags
1152	int mode
1153	SV * callback
1154	PROTOTYPE: $$$;$	714	PROTOTYPE: $$$;$
1155	PPCODE:	715	PPCODE:
1156	{	716	{
1157	dREQ;	717	dREQ;
1158		718
1159	req->type = REQ_OPEN;	719	req->type = EIO_OPEN;
1160	req->data = newSVsv (pathname);	720	req->sv1 = newSVsv (pathname);
1161	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
1162	req->fd = flags;	722	req->int1 = flags;
1163	req->mode = mode;	723	req->int2 = mode;
1164		724
1165	REQ_SEND;	725	REQ_SEND;
1166	}	726	}
1167		727
1168	void	728	void
1169	aio_close (fh,callback=&PL_sv_undef)	729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1170	SV * fh
1171	SV * callback
1172	PROTOTYPE: $;$	730	PROTOTYPE: $;$
1173	ALIAS:	731	ALIAS:
1174	aio_close = REQ_CLOSE
1175	aio_fsync = REQ_FSYNC	732	aio_fsync = EIO_FSYNC
1176	aio_fdatasync = REQ_FDATASYNC	733	aio_fdatasync = EIO_FDATASYNC
1177	PPCODE:	734	PPCODE:
1178	{	735	{
		736	int fd = s_fileno_croak (fh, 0);
1179	dREQ;	737	dREQ;
1180		738
1181	req->type = ix;	739	req->type = ix;
1182	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
1183	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	741	req->int1 = fd;
1184		742
1185	REQ_SEND (req);	743	REQ_SEND (req);
1186	}	744	}
1187		745
1188	void	746	void
		747	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		748	PROTOTYPE: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
1189	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1190	SV * fh
1191	UV offset
1192	UV length
1193	SV * data
1194	UV dataoffset
1195	SV * callback
1196	ALIAS:	795	ALIAS:
1197	aio_read = REQ_READ	796	aio_read = EIO_READ
1198	aio_write = REQ_WRITE	797	aio_write = EIO_WRITE
1199	PROTOTYPE: $$$$$;$	798	PROTOTYPE: $$$$$;$
1200	PPCODE:	799	PPCODE:
1201	{	800	{
1202	aio_req req;
1203	STRLEN svlen;	801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1204	char *svptr = SvPVbyte (data, svlen);	803	char *svptr = SvPVbyte (data, svlen);
1205		804	UV len = SvUV (length);
1206	SvUPGRADE (data, SVt_PV);
1207	SvPOK_on (data);
1208		805
1209	if (dataoffset < 0)	806	if (dataoffset < 0)
1210	dataoffset += svlen;	807	dataoffset += svlen;
1211		808
1212	if (dataoffset < 0 || dataoffset > svlen)	809	if (dataoffset < 0 || dataoffset > svlen)
1213	croak ("data offset outside of string");	810	croak ("dataoffset outside of data scalar");
1214		811
1215	if (ix == REQ_WRITE)	812	if (ix == EIO_WRITE)
1216	{	813	{
1217	/* write: check length and adjust. */	814	/* write: check length and adjust. */
1218	if (length < 0 || length + dataoffset > svlen)	815	if (!SvOK (length) || len + dataoffset > svlen)
1219	length = svlen - dataoffset;	816	len = svlen - dataoffset;
1220	}	817	}
1221	else	818	else
1222	{	819	{
1223	/* read: grow scalar as necessary */	820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
1224	svptr = SvGROW (data, length + dataoffset);	822	svptr = SvGROW (data, len + dataoffset + 1);
1225	}	823	}
1226
1227	if (length < 0)
1228	croak ("length must not be negative");
1229		824
1230	{	825	{
1231	dREQ;	826	dREQ;
1232		827
1233	req->type = ix;	828	req->type = ix;
1234	req->fh = newSVsv (fh);	829	req->sv1 = newSVsv (fh);
1235	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	830	req->int1 = fd;
1236	: IoOFP (sv_2io (fh)));	831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1237	req->offset = offset;	832	req->size = len;
1238	req->length = length;
1239	req->data = SvREFCNT_inc (data);	833	req->sv2 = SvREFCNT_inc (data);
1240	req->dataptr = (char *)svptr + dataoffset;	834	req->ptr2 = (char *)svptr + dataoffset;
		835	req->stroffset = dataoffset;
1241		836
1242	if (!SvREADONLY (data))	837	if (!SvREADONLY (data))
1243	{	838	{
1244	SvREADONLY_on (data);	839	SvREADONLY_on (data);
1245	req->data2ptr = (void *)data;	840	req->flags |= FLAG_SV2_RO_OFF;
1246	}	841	}
1247		842
1248	REQ_SEND;	843	REQ_SEND;
1249	}	844	}
1250	}	845	}
1251		846
1252	void	847	void
		848	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $$;$
		850	PPCODE:
		851	{
		852	SV *data;
		853	dREQ;
		854
		855	req->type = EIO_READLINK;
		856	req->sv1 = newSVsv (path);
		857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858
		859	REQ_SEND;
		860	}
		861
		862	void
1253	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	863	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1254	SV * out_fh
1255	SV * in_fh
1256	UV in_offset
1257	UV length
1258	SV * callback
1259	PROTOTYPE: $$$$;$	864	PROTOTYPE: $$$$;$
1260	PPCODE:	865	PPCODE:
1261	{	866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
1262	dREQ;	869	dREQ;
1263		870
1264	req->type = REQ_SENDFILE;	871	req->type = EIO_SENDFILE;
1265	req->fh = newSVsv (out_fh);	872	req->sv1 = newSVsv (out_fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	873	req->int1 = ofd;
1267	req->fh2 = newSVsv (in_fh);	874	req->sv2 = newSVsv (in_fh);
1268	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	875	req->int2 = ifd;
1269	req->offset = in_offset;	876	req->offs = in_offset;
1270	req->length = length;	877	req->size = length;
1271		878
1272	REQ_SEND;	879	REQ_SEND;
1273	}	880	}
1274		881
1275	void	882	void
1276	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1277	SV * fh
1278	UV offset
1279	IV length
1280	SV * callback
1281	PROTOTYPE: $$$;$	884	PROTOTYPE: $$$;$
1282	PPCODE:	885	PPCODE:
1283	{	886	{
		887	int fd = s_fileno_croak (fh, 0);
1284	dREQ;	888	dREQ;
1285		889
1286	req->type = REQ_READAHEAD;	890	req->type = EIO_READAHEAD;
1287	req->fh = newSVsv (fh);	891	req->sv1 = newSVsv (fh);
1288	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	892	req->int1 = fd;
1289	req->offset = offset;	893	req->offs = offset;
1290	req->length = length;	894	req->size = length;
1291		895
1292	REQ_SEND;	896	REQ_SEND;
1293	}	897	}
1294		898
1295	void	899	void
1296	aio_stat (fh_or_path,callback=&PL_sv_undef)	900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1297	SV * fh_or_path
1298	SV * callback
1299	ALIAS:	901	ALIAS:
1300	aio_stat = REQ_STAT	902	aio_stat = EIO_STAT
1301	aio_lstat = REQ_LSTAT	903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
1302	PPCODE:	905	PPCODE:
1303	{	906	{
1304	dREQ;	907	dREQ;
1305		908
1306	New (0, req->statdata, 1, Stat_t);	909	req->sv1 = newSVsv (fh_or_path);
1307	if (!req->statdata)
1308	{
1309	req_free (req);
1310	croak ("out of memory during aio_req->statdata allocation");
1311	}
1312		910
1313	if (SvPOK (fh_or_path))	911	if (SvPOK (req->sv1))
1314	{	912	{
1315	req->type = ix;	913	req->type = ix;
1316	req->data = newSVsv (fh_or_path);
1317	req->dataptr = SvPVbyte_nolen (req->data);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	}	915	}
1319	else	916	else
1320	{	917	{
1321	req->type = REQ_FSTAT;	918	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1322	req->fh = newSVsv (fh_or_path);
1323	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	919	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}	920	}
1325		921
1326	REQ_SEND;	922	REQ_SEND;
1327	}	923	}
1328		924
1329	void	925	void
		926	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		927	PPCODE:
		928	{
		929	dREQ;
		930
		931	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		932	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		933	req->sv1 = newSVsv (fh_or_path);
		934
		935	if (SvPOK (req->sv1))
		936	{
		937	req->type = EIO_UTIME;
		938	req->ptr1 = SvPVbyte_nolen (req->sv1);
		939	}
		940	else
		941	{
		942	req->type = EIO_FUTIME;
		943	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		944	}
		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->sv1 = newSVsv (fh_or_path);
		956	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		957
		958	if (SvPOK (req->sv1))
		959	{
		960	req->type = EIO_TRUNCATE;
		961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962	}
		963	else
		964	{
		965	req->type = EIO_FTRUNCATE;
		966	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		967	}
		968
		969	REQ_SEND;
		970	}
		971
		972	void
		973	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_chmod = EIO_CHMOD
		976	aio_mkdir = EIO_MKDIR
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->int2 = mode;
		982	req->sv1 = newSVsv (fh_or_path);
		983
		984	if (SvPOK (req->sv1))
		985	{
		986	req->type = ix;
		987	req->ptr1 = SvPVbyte_nolen (req->sv1);
		988	}
		989	else
		990	{
		991	req->type = EIO_FCHMOD;
		992	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		993	}
		994
		995	REQ_SEND;
		996	}
		997
		998	void
		999	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1000	PPCODE:
		1001	{
		1002	dREQ;
		1003
		1004	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1005	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1006	req->sv1 = newSVsv (fh_or_path);
		1007
		1008	if (SvPOK (req->sv1))
		1009	{
		1010	req->type = EIO_CHOWN;
		1011	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1012	}
		1013	else
		1014	{
		1015	req->type = EIO_FCHOWN;
		1016	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1017	}
		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_READDIR;
		1029	req->sv1 = newSVsv (pathname);
		1030	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1031	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1032
		1033	if (flags & EIO_READDIR_DENTS)
		1034	req->int1 |= EIO_READDIR_CUSTOM2;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	void
1330	aio_unlink (pathname,callback=&PL_sv_undef)	1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	SV * pathname
1332	SV * callback
1333	ALIAS:	1041	ALIAS:
1334	aio_unlink = REQ_UNLINK	1042	aio_unlink = EIO_UNLINK
1335	aio_rmdir = REQ_RMDIR	1043	aio_rmdir = EIO_RMDIR
1336	aio_readdir = REQ_READDIR	1044	aio_readdir = EIO_READDIR
1337	PPCODE:	1045	PPCODE:
1338	{	1046	{
1339	dREQ;	1047	dREQ;
1340		1048
1341	req->type = ix;	1049	req->type = ix;
1342	req->data = newSVsv (pathname);	1050	req->sv1 = newSVsv (pathname);
1343	req->dataptr = SvPVbyte_nolen (req->data);	1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
1344		1052
1345	REQ_SEND;	1053	REQ_SEND;
1346	}	1054	}
1347		1055
1348	void	1056	void
1349	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1350	SV * oldpath
1351	SV * newpath
1352	SV * callback
1353	ALIAS:	1058	ALIAS:
1354	aio_link = REQ_LINK	1059	aio_link = EIO_LINK
1355	aio_symlink = REQ_SYMLINK	1060	aio_symlink = EIO_SYMLINK
1356	aio_rename = REQ_RENAME	1061	aio_rename = EIO_RENAME
1357	PPCODE:	1062	PPCODE:
1358	{	1063	{
1359	dREQ;	1064	dREQ;
1360		1065
1361	req->type = ix;	1066	req->type = ix;
1362	req->fh = newSVsv (oldpath);	1067	req->sv1 = newSVsv (oldpath);
1363	req->data2ptr = SvPVbyte_nolen (req->fh);	1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
1364	req->data = newSVsv (newpath);	1069	req->sv2 = newSVsv (newpath);
1365	req->dataptr = SvPVbyte_nolen (req->data);	1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
1366		1071
1367	REQ_SEND;	1072	REQ_SEND;
1368	}	1073	}
1369		1074
1370	void	1075	void
1371	aio_busy (delay,callback=&PL_sv_undef)	1076	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1372	double delay
1373	SV * callback
1374	PPCODE:	1077	PPCODE:
1375	{	1078	{
1376	dREQ;	1079	dREQ;
1377		1080
1378	req->type = REQ_BUSY;	1081	req->type = EIO_MKNOD;
1379	req->fd = delay < 0. ? 0 : delay;	1082	req->sv1 = newSVsv (pathname);
1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1083	req->ptr1 = SvPVbyte_nolen (req->sv1);
1381		1084	req->int2 = (mode_t)mode;
		1085	req->offs = dev;
		1086
1382	REQ_SEND;	1087	REQ_SEND;
1383	}	1088	}
1384		1089
1385	void	1090	void
		1091	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1092	ALIAS:
		1093	aio_mtouch = EIO_MTOUCH
		1094	aio_msync = EIO_MSYNC
		1095	PROTOTYPE: $$$$;$
		1096	PPCODE:
		1097	{
		1098	STRLEN svlen;
		1099	UV len = SvUV (length);
		1100	char *svptr = SvPVbyte (data, svlen);
		1101
		1102	if (offset < 0)
		1103	offset += svlen;
		1104
		1105	if (offset < 0 || offset > svlen)
		1106	croak ("offset outside of scalar");
		1107
		1108	if (!SvOK (length) || len + offset > svlen)
		1109	len = svlen - offset;
		1110
		1111	{
		1112	dREQ;
		1113
		1114	req->type = ix;
		1115	req->size = len;
		1116	req->sv2 = SvREFCNT_inc (data);
		1117	req->ptr2 = (char *)svptr + offset;
		1118	req->int1 = flags;
		1119
		1120	REQ_SEND;
		1121	}
		1122	}
		1123
		1124	void
		1125	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_BUSY;
		1131	req->nv1 = delay < 0. ? 0. : delay;
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
1386	aio_group (callback=&PL_sv_undef)	1137	aio_group (SV *callback=&PL_sv_undef)
1387	SV * callback
1388	PROTOTYPE: ;$	1138	PROTOTYPE: ;$
1389	PPCODE:	1139	PPCODE:
1390	{	1140	{
1391	dREQ;	1141	dREQ;
1392		1142
1393	req->type = REQ_GROUP;	1143	req->type = EIO_GROUP;
		1144
1394	req_send (req);	1145	req_submit (req);
1395
1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1146	XPUSHs (req_sv (req, aio_grp_stash));
1397	}	1147	}
1398		1148
1399	void	1149	void
1400	aio_nop (callback=&PL_sv_undef)	1150	aio_nop (SV *callback=&PL_sv_undef)
1401	SV * callback	1151	ALIAS:
		1152	aio_nop = EIO_NOP
		1153	aio_sync = EIO_SYNC
1402	PPCODE:	1154	PPCODE:
1403	{	1155	{
1404	dREQ;	1156	dREQ;
1405		1157
1406	req->type = REQ_NOP;	1158	req->type = ix;
1407		1159
1408	REQ_SEND;	1160	REQ_SEND;
1409	}	1161	}
1410		1162
1411	int	1163	int
1412	aioreq_pri (int pri = 0)	1164	aioreq_pri (int pri = 0)
1413	PROTOTYPE: ;$	1165	PROTOTYPE: ;$
1414	CODE:	1166	CODE:
1415	RETVAL = next_pri - PRI_BIAS;	1167	RETVAL = next_pri;
1416	if (items > 0)	1168	if (items > 0)
1417	{	1169	{
1418	if (pri < PRI_MIN) pri = PRI_MIN;	1170	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1419	if (pri > PRI_MAX) pri = PRI_MAX;	1171	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1420	next_pri = pri + PRI_BIAS;	1172	next_pri = pri;
1421	}	1173	}
1422	OUTPUT:	1174	OUTPUT:
1423	RETVAL	1175	RETVAL
1424		1176
1425	void	1177	void
1426	aioreq_nice (int nice = 0)	1178	aioreq_nice (int nice = 0)
1427	CODE:	1179	CODE:
1428	nice = next_pri - nice;	1180	nice = next_pri - nice;
1429	if (nice < PRI_MIN) nice = PRI_MIN;	1181	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1430	if (nice > PRI_MAX) nice = PRI_MAX;	1182	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1431	next_pri = nice + PRI_BIAS;	1183	next_pri = nice;
1432		1184
1433	void	1185	void
1434	flush ()	1186	flush ()
1435	PROTOTYPE:	1187	PROTOTYPE:
1436	CODE:	1188	CODE:
1437	while (nreqs)	1189	while (eio_nreqs ())
1438	{	1190	{
1439	poll_wait ();	1191	poll_wait ();
1440	poll_cb (0);	1192	poll_cb ();
1441	}	1193	}
1442		1194
1443	void	1195	int
1444	poll()	1196	poll()
1445	PROTOTYPE:	1197	PROTOTYPE:
1446	CODE:	1198	CODE:
1447	if (nreqs)
1448	{
1449	poll_wait ();	1199	poll_wait ();
1450	poll_cb (0);	1200	RETVAL = poll_cb ();
1451	}	1201	OUTPUT:
		1202	RETVAL
1452		1203
1453	int	1204	int
1454	poll_fileno()	1205	poll_fileno()
1455	PROTOTYPE:	1206	PROTOTYPE:
1456	CODE:	1207	CODE:
1457	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
1458	OUTPUT:	1209	OUTPUT:
1459	RETVAL	1210	RETVAL
1460		1211
1461	int	1212	int
1462	poll_cb(...)	1213	poll_cb(...)
1463	PROTOTYPE:	1214	PROTOTYPE:
1464	CODE:	1215	CODE:
1465	RETVAL = poll_cb (0);	1216	RETVAL = poll_cb ();
1466	OUTPUT:	1217	OUTPUT:
1467	RETVAL	1218	RETVAL
1468		1219
1469	int
1470	poll_some(int max = 0)
1471	PROTOTYPE: $
1472	CODE:
1473	RETVAL = poll_cb (max);
1474	OUTPUT:
1475	RETVAL
1476
1477	void	1220	void
1478	poll_wait()	1221	poll_wait()
1479	PROTOTYPE:	1222	PROTOTYPE:
1480	CODE:	1223	CODE:
1481	if (nreqs)
1482	poll_wait ();	1224	poll_wait ();
1483		1225
1484	int	1226	int
1485	nreqs()	1227	nreqs()
1486	PROTOTYPE:	1228	PROTOTYPE:
1487	CODE:	1229	CODE:
1488	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
1489	OUTPUT:	1231	OUTPUT:
1490	RETVAL	1232	RETVAL
1491		1233
1492	int	1234	int
1493	nready()	1235	nready()
1494	PROTOTYPE:	1236	PROTOTYPE:
1495	CODE:	1237	CODE:
1496	if (WORDREAD_UNSAFE) LOCK (reqlock);
1497	RETVAL = nready;	1238	RETVAL = eio_nready ();
1498	if (WORDREAD_UNSAFE) UNLOCK (reqlock);
1499	OUTPUT:	1239	OUTPUT:
1500	RETVAL	1240	RETVAL
1501		1241
1502	int	1242	int
1503	npending()	1243	npending()
1504	PROTOTYPE:	1244	PROTOTYPE:
1505	CODE:	1245	CODE:
1506	if (WORDREAD_UNSAFE) LOCK (reslock);
1507	RETVAL = npending;	1246	RETVAL = eio_npending ();
1508	if (WORDREAD_UNSAFE) UNLOCK (reslock);
1509	OUTPUT:	1247	OUTPUT:
1510	RETVAL	1248	RETVAL
1511		1249
		1250	int
		1251	nthreads()
		1252	PROTOTYPE:
		1253	CODE:
		1254	RETVAL = eio_nthreads ();
		1255	OUTPUT:
		1256	RETVAL
		1257
		1258	int
		1259	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1260	PROTOTYPE: $$$$
		1261	CODE:
		1262	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1263	RETVAL = posix_fadvise (fh, offset, length, advice);
		1264	#else
		1265	RETVAL = errno = ENOSYS;
		1266	#endif
		1267	OUTPUT:
		1268	RETVAL
		1269
		1270	ssize_t
		1271	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1272	PROTOTYPE: $$$$
		1273	CODE:
		1274	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	mlockall (int flags)
		1280	PROTOTYPE: $
		1281	CODE:
		1282	#if _POSIX_MEMLOCK
		1283	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1284	extern int mallopt (int, int);
		1285	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1286	#endif
		1287	mlockall (flags);
		1288	#else
		1289	RETVAL ＝-1;
		1290	errno = ENOSYS;
		1291	#endif
		1292	OUTPUT:
		1293	RETVAL
		1294
		1295	int
		1296	munlockall ()
		1297	PROTOTYPE:
		1298	CODE:
		1299	#if _POSIX_MEMLOCK
		1300	munlockall ();
		1301	#else
		1302	RETVAL ＝-1;
		1303	errno = ENOSYS;
		1304	#endif
		1305	OUTPUT:
		1306	RETVAL
		1307
		1308	void _on_next_submit (SV *cb)
		1309	CODE:
		1310	SvREFCNT_dec (on_next_submit);
		1311	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1312
1512	PROTOTYPES: DISABLE	1313	PROTOTYPES: DISABLE
1513		1314
1514	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1315	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1515		1316
1516	void	1317	void
1517	cancel (aio_req_ornot req)	1318	cancel (aio_req_ornot req)
1518	CODE:	1319	CODE:
1519	req_cancel (req);	1320	eio_cancel (req);
1520		1321
1521	void	1322	void
1522	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1323	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1523	CODE:	1324	PPCODE:
		1325	{
		1326	if (GIMME_V != G_VOID)
		1327	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1328
		1329	if (items > 1)
		1330	{
		1331	SV *cb_cv =get_cb (callback);
		1332
1524	SvREFCNT_dec (req->callback);	1333	SvREFCNT_dec (req->callback);
1525	req->callback = newSVsv (callback);	1334	req->callback = SvREFCNT_inc (cb_cv);
		1335	}
		1336	}
1526		1337
1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1528		1339
1529	void	1340	void
1530	add (aio_req grp, ...)	1341	add (aio_req grp, ...)
1531	PPCODE:	1342	PPCODE:
1532	{	1343	{
1533	int i;	1344	int i;
1534	aio_req req;
1535		1345
1536	if (grp->fd == 2)	1346	if (grp->int1 == 2)
1537	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1347	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1538		1348
1539	for (i = 1; i < items; ++i )	1349	for (i = 1; i < items; ++i )
1540	{	1350	{
		1351	aio_req req;
		1352
1541	if (GIMME_V != G_VOID)	1353	if (GIMME_V != G_VOID)
1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1354	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1543		1355
1544	req = SvAIO_REQ (ST (i));	1356	req = SvAIO_REQ (ST (i));
1545		1357
1546	if (req)	1358	if (req)
1547	{	1359	eio_grp_add (grp, req);
1548	++grp->length;
1549	req->grp = grp;
1550
1551	req->grp_prev = 0;
1552	req->grp_next = grp->grp_first;
1553
1554	if (grp->grp_first)
1555	grp->grp_first->grp_prev = req;
1556
1557	grp->grp_first = req;
1558	}
1559	}	1360	}
1560	}	1361	}
1561		1362
1562	void	1363	void
1563	cancel_subs (aio_req_ornot req)	1364	cancel_subs (aio_req_ornot req)
…		…
1572	AV *av;	1373	AV *av;
1573		1374
1574	grp->errorno = errno;	1375	grp->errorno = errno;
1575		1376
1576	av = newAV ();	1377	av = newAV ();
		1378	av_extend (av, items - 1);
1577		1379
1578	for (i = 1; i < items; ++i )	1380	for (i = 1; i < items; ++i )
1579	av_push (av, newSVsv (ST (i)));	1381	av_push (av, newSVsv (ST (i)));
1580		1382
1581	SvREFCNT_dec (grp->data);	1383	SvREFCNT_dec (grp->sv1);
1582	grp->data = (SV *)av;	1384	grp->sv1 = (SV *)av;
1583	}	1385	}
1584		1386
1585	void	1387	void
1586	errno (aio_req grp, int errorno = errno)	1388	errno (aio_req grp, int errorno = errno)
1587	CODE:	1389	CODE:
1588	grp->errorno = errorno;	1390	grp->errorno = errorno;
1589		1391
1590	void	1392	void
1591	limit (aio_req grp, int limit)	1393	limit (aio_req grp, int limit)
1592	CODE:	1394	CODE:
1593	grp->fd2 = limit;	1395	eio_grp_limit (grp, limit);
1594	aio_grp_feed (grp);
1595		1396
1596	void	1397	void
1597	feed (aio_req grp, SV *callback=&PL_sv_undef)	1398	feed (aio_req grp, SV *callback=&PL_sv_undef)
1598	CODE:	1399	CODE:
1599	{	1400	{
1600	SvREFCNT_dec (grp->fh2);	1401	SvREFCNT_dec (grp->sv2);
1601	grp->fh2 = newSVsv (callback);	1402	grp->sv2 = newSVsv (callback);
		1403	grp->feed = aio_grp_feed;
1602		1404
1603	if (grp->fd2 <= 0)	1405	if (grp->int2 <= 0)
1604	grp->fd2 = 2;	1406	grp->int2 = 2;
1605		1407
1606	aio_grp_feed (grp);	1408	eio_grp_limit (grp, grp->int2);
1607	}	1409	}
1608		1410

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