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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.67 by root, Tue Oct 24 03:17:39 2006 UTC vs.
Revision 1.162 by root, Sun Jan 10 23:05:12 2010 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "schmorp.h"
14
15	#include <pthread.h>
16		10
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	14	#include <sys/types.h>
22	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
23	#include <limits.h>	17	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	18	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	19	#include <sched.h>
28		20
29	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
30	# if __linux
31	# include <sys/sendfile.h>	22	# include <sys/mman.h>
32	# elif __freebsd	23	#endif
33	# include <sys/socket.h>	24
		25	#if !_POSIX_MAPPED_FILES
		26	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		27	# define munmap(addr,length) (errno = ENOSYS, -1)
		28	#endif
		29
		30	/* perl namespace pollution */
		31	#undef VERSION
		32
		33	#ifdef _WIN32
		34
		35	# define EIO_STRUCT_DIRENT Direntry_t
		36	# undef malloc
		37	# undef free
		38
		39	// perl overrides all those nice win32 functions
		40	# undef open
		41	# undef read
		42	# undef write
		43	# undef send
		44	# undef recv
		45	# undef stat
		46	# undef fstat
		47	# define lstat stat
		48	# undef truncate
		49	# undef ftruncate
		50	# undef open
		51	# undef close
		52	# undef unlink
		53	# undef rmdir
		54	# undef rename
		55	# undef lseek
		56
		57	# define chown(a,b,c) (errno = ENOSYS, -1)
		58	# define fchown(a,b,c) (errno = ENOSYS, -1)
		59	# define fchmod(a,b) (errno = ENOSYS, -1)
		60	# define symlink(a,b) (errno = ENOSYS, -1)
		61	# define readlink(a,b,c) (errno = ENOSYS, -1)
		62	# define mknod(a,b,c) (errno = ENOSYS, -1)
		63	# define truncate(a,b) (errno = ENOSYS, -1)
		64	# define ftruncate(fd,o) chsize ((fd), (o))
		65	# define fsync(fd) _commit (fd)
		66	# define opendir(fd) (errno = ENOSYS, 0)
		67	# define readdir(fd) (errno = ENOSYS, -1)
		68	# define closedir(fd) (errno = ENOSYS, -1)
		69	# define mkdir(a,b) mkdir (a)
		70
		71	#else
		72
34	# include <sys/uio.h>	73	# include <sys/time.h>
35	# elif __hpux
36	# include <sys/socket.h>
37	# elif __solaris /* not yet */
38	# include <sys/sendfile.h>	74	# include <sys/select.h>
		75	# include <unistd.h>
		76	# include <utime.h>
		77	# include <signal.h>
		78	# define EIO_STRUCT_DIRENT struct dirent
		79
		80	#endif
		81
		82	/* perl stupidly overrides readdir and maybe others */
		83	/* with thread-unsafe versions, imagine that :( */
		84	#undef readdir
		85	#undef opendir
		86	#undef closedir
		87
		88	#define EIO_STRUCT_STAT Stat_t
		89
		90	/* use NV for 32 bit perls as it allows larger offsets */
		91	#if IVSIZE >= 8
		92	# define VAL64 IV
		93	# define SvVAL64 SvIV
		94	# define newSVval64 newSViv
		95	#else
		96	# define VAL64 NV
		97	# define SvVAL64 SvNV
		98	# define newSVval64 newSVnv
		99	#endif
		100
		101	/*****************************************************************************/
		102
		103	#if __GNUC__ >= 3
		104	# define expect(expr,value) __builtin_expect ((expr),(value))
		105	#else
		106	# define expect(expr,value) (expr)
		107	#endif
		108
		109	#define expect_false(expr) expect ((expr) != 0, 0)
		110	#define expect_true(expr) expect ((expr) != 0, 1)
		111
		112	/*****************************************************************************/
		113
		114	typedef SV SV8; /* byte-sv, used for argument-checking */
		115	typedef int aio_rfd; /* read file desriptor */
		116	typedef int aio_wfd; /* write file descriptor */
		117
		118	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		119
		120	#define EIO_REQ_MEMBERS \
		121	SV *callback; \
		122	SV *sv1, *sv2; \
		123	STRLEN stroffset; \
		124	SV *self;
		125
		126	#define EIO_NO_WRAPPERS 1
		127
		128	#include "libeio/eio.h"
		129
		130	#ifndef POSIX_FADV_NORMAL
		131	# define POSIX_FADV_NORMAL 0
		132	# define NO_FADVISE 1
		133	#endif
		134	#ifndef POSIX_FADV_SEQUENTIAL
		135	# define POSIX_FADV_SEQUENTIAL 0
		136	#endif
		137	#ifndef POSIX_FADV_RANDOM
		138	# define POSIX_FADV_RANDOM 0
		139	#endif
		140	#ifndef POSIX_FADV_NOREUSE
		141	# define POSIX_FADV_NOREUSE 0
		142	#endif
		143	#ifndef POSIX_FADV_WILLNEED
		144	# define POSIX_FADV_WILLNEED 0
		145	#endif
		146	#ifndef POSIX_FADV_DONTNEED
		147	# define POSIX_FADV_DONTNEED 0
		148	#endif
		149
		150	#ifndef ST_NODEV
		151	# define ST_NODEV 0
		152	#endif
		153	#ifndef ST_NOEXEC
		154	# define ST_NOEXEC 0
		155	#endif
		156	#ifndef ST_SYNCHRONOUS
		157	# define ST_SYNCHRONOUS 0
		158	#endif
		159	#ifndef ST_MANDLOCK
		160	# define ST_MANDLOCK 0
		161	#endif
		162	#ifndef ST_WRITE
		163	# define ST_WRITE 0
		164	#endif
		165	#ifndef ST_APPEND
		166	# define ST_APPEND 0
		167	#endif
		168	#ifndef ST_IMMUTABLE
		169	# define ST_IMMUTABLE 0
		170	#endif
		171	#ifndef ST_NOATIME
		172	# define ST_NOATIME 0
		173	#endif
		174	#ifndef ST_NODIRATIME
		175	# define ST_NODIRATIME 0
		176	#endif
		177	#ifndef ST_RELATIME
		178	# define ST_RELATIME 0
		179	#endif
		180
		181	#ifndef MCL_CURRENT
		182	# define MCL_CURRENT 0
		183	#endif
		184	#ifndef MCL_FUTURE
		185	# define MCL_FUTURE 0
		186	#endif
		187
		188	#ifndef MAP_ANONYMOUS
		189	# ifdef MAP_ANON
		190	# define MAP_ANONYMOUS MAP_ANON
39	# else	191	# else
40	# error sendfile support requested but not available	192	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
41	# endif	193	# endif
42	#endif	194	#endif
43		195	#ifndef MAP_HUGETLB
44	/* used for struct dirent, AIX doesn't provide it */	196	# define MAP_HUGETLB 0
45	#ifndef NAME_MAX
46	# define NAME_MAX 4096
47	#endif	197	#endif
48		198	#ifndef MAP_LOCKED
49	#if __ia64	199	# define MAP_LOCKED 0
50	# define STACKSIZE 65536
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN
53	#else
54	# define STACKSIZE 16384
55	#endif	200	#endif
		201	#ifndef MAP_NORESERVE
		202	# define MAP_NORESERVE 0
		203	#endif
		204	#ifndef MAP_POPULATE
		205	# define MAP_POPULATE 0
		206	#endif
		207	#ifndef MAP_NONBLOCK
		208	# define MAP_NONBLOCK 0
		209	#endif
56		210
57	/* buffer size for various temporary buffers */	211	#ifndef PAGESIZE
58	#define AIO_BUFSIZE 65536	212	# define PAGESIZE sysconf (_SC_PAGESIZE)
		213	#endif
59		214
60	#define dBUF \	215	static int req_invoke (eio_req *req);
61	char *aio_buf = malloc (AIO_BUFSIZE); \	216	#define EIO_FINISH(req) req_invoke (req)
62	if (!aio_buf) \	217	static void req_destroy (eio_req *grp);
63	return -1;	218	#define EIO_DESTROY(req) req_destroy (req)
64
65	#define fBUF free (aio_buf)
66		219
67	enum {	220	enum {
68	REQ_QUIT,	221	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
69	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,
79	};	222	};
80		223
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	224	#include "libeio/eio.c"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		225
84	typedef struct aio_cb
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;
89	SV *fh, *fh2;
90	void *dataptr, *data2ptr;
91	Stat_t *statdata;
92	off_t offset;
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;
97	int type;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101
102	unsigned char flags;
103	unsigned char pri;
104
105	SV *self; /* the perl counterpart of this request, if any */
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
107	} aio_cb;
108
109	enum {
110	FLAG_CANCELLED = 0x01,
111	};
112
113	typedef aio_cb *aio_req;	226	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	227	typedef eio_req *aio_req_ornot;
115		228
116	enum {	229	static SV *on_next_submit;
117	PRI_MIN = -4,	230	static int next_pri = EIO_PRI_DEFAULT;
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};
124
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126
127	static int started, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;	231	static int max_outstanding;
130	static int respipe [2];
131		232
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	233	static s_epipe respipe;
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif
137		234
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	235	static void req_destroy (aio_req req);
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
141
142	/*
143	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.
146	*/
147	typedef struct {
148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
149	int size;
150	} reqq;
151
152	static reqq req_queue;
153	static reqq res_queue;
154
155	int reqq_push (reqq *q, aio_req req)
156	{
157	int pri = req->pri;
158	req->next = 0;
159
160	if (q->qe[pri])
161	{
162	q->qe[pri]->next = req;
163	q->qe[pri] = req;
164	}
165	else
166	q->qe[pri] = q->qs[pri] = req;
167
168	return q->size++;
169	}
170
171	aio_req reqq_shift (reqq *q)
172	{
173	int pri;
174
175	if (!q->size)
176	return 0;
177
178	--q->size;
179
180	for (pri = NUM_PRI; pri--; )
181	{
182	aio_req req = q->qs[pri];
183
184	if (req)
185	{
186	if (!(q->qs[pri] = req->next))
187	q->qe[pri] = 0;
188
189	return req;
190	}
191	}
192
193	abort ();
194	}
195
196	static void req_invoke (aio_req req);	236	static void req_cancel (aio_req req);
197	static void req_free (aio_req req);	237
		238	static void want_poll (void)
		239	{
		240	/* write a dummy byte to the pipe so fh becomes ready */
		241	s_epipe_signal (&respipe);
		242	}
		243
		244	static void done_poll (void)
		245	{
		246	/* read any signals sent by the worker threads */
		247	s_epipe_drain (&respipe);
		248	}
198		249
199	/* must be called at most once */	250	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	251	static SV *req_sv (aio_req req, HV *stash)
201	{	252	{
202	if (!req->self)	253	if (!req->self)
203	{	254	{
204	req->self = (SV *)newHV ();	255	req->self = (SV *)newHV ();
205	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	256	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
206	}	257	}
207		258
208	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	259	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
209	}	260	}
210		261
211	static aio_req SvAIO_REQ (SV *sv)	262	static aio_req SvAIO_REQ (SV *sv)
212	{	263	{
213	MAGIC *mg;	264	MAGIC *mg;
214		265
215	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	266	if (!SvROK (sv)
		267	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		268	&& SvSTASH (SvRV (sv)) != aio_req_stash
		269	&& !sv_derived_from (sv, "IO::AIO::REQ")))
216	croak ("object of class " AIO_REQ_KLASS " expected");	270	croak ("object of class IO::AIO::REQ expected");
217		271
218	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
219		273
220	return mg ? (aio_req)mg->mg_ptr : 0;	274	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	275	}
222		276
223	static void aio_grp_feed (aio_req grp)	277	static void aio_grp_feed (aio_req grp)
224	{	278	{
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	279	if (grp->sv2 && SvOK (grp->sv2))
226	{	280	{
227	int old_len = grp->length;
228
229	if (grp->fh2 && SvOK (grp->fh2))
230	{
231	dSP;	281	dSP;
232		282
233	ENTER;	283	ENTER;
234	SAVETMPS;	284	SAVETMPS;
235	PUSHMARK (SP);	285	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	286	XPUSHs (req_sv (grp, aio_grp_stash));
237	PUTBACK;	287	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	288	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	289	SPAGAIN;
240	FREETMPS;	290	FREETMPS;
241	LEAVE;	291	LEAVE;
242	}
243
244	/* stop if no progress has been made */
245	if (old_len == grp->length)
246	{
247	SvREFCNT_dec (grp->fh2);
248	grp->fh2 = 0;
249	break;
250	}
251	}	292	}
252	}	293	}
253		294
254	static void aio_grp_dec (aio_req grp)	295	static void req_submit (eio_req *req)
255	{	296	{
256	--grp->length;	297	eio_submit (req);
257		298
258	/* call feeder, if applicable */	299	if (expect_false (on_next_submit))
259	aio_grp_feed (grp);
260
261	/* finish, if done */
262	if (!grp->length && grp->fd)
263	{	300	{
264	req_invoke (grp);	301	dSP;
265	req_free (grp);	302	SV *cb = sv_2mortal (on_next_submit);
		303
		304	on_next_submit = 0;
		305
		306	PUSHMARK (SP);
		307	PUTBACK;
		308	call_sv (cb, G_DISCARD | G_EVAL);
266	}	309	}
267	}	310	}
268		311
269	static void poll_wait ()	312	static int req_invoke (eio_req *req)
270	{	313	{
271	fd_set rfd;	314	dSP;
272		315
273	while (nreqs)	316	if (req->flags & FLAG_SV2_RO_OFF)
		317	SvREADONLY_off (req->sv2);
		318
		319	if (!EIO_CANCELLED (req) && req->callback)
274	{	320	{
275	int size;
276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)
295	{
296	dSP;
297
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299	{
300	errno = req->errorno;
301
302	ENTER;	321	ENTER;
303	SAVETMPS;	322	SAVETMPS;
304	PUSHMARK (SP);	323	PUSHMARK (SP);
305	EXTEND (SP, 1);	324	EXTEND (SP, 1);
306		325
307	switch (req->type)	326	switch (req->type)
308	{	327	{
309	case REQ_READDIR:	328	case EIO_READDIR:
310	{	329	{
311	SV *rv = &PL_sv_undef;	330	SV *rv = &PL_sv_undef;
312		331
313	if (req->result >= 0)	332	if (req->result >= 0)
314	{	333	{
		334	int i;
315	char *buf = req->data2ptr;	335	char *names = (char *)req->ptr2;
		336	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
316	AV *av = newAV ();	337	AV *av = newAV ();
317		338
318	while (req->result)	339	av_extend (av, req->result - 1);
		340
		341	for (i = 0; i < req->result; ++i)
319	{	342	{
		343	if (req->int1 & EIO_READDIR_DENTS)
		344	{
		345	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		346
		347	if (req->int1 & EIO_READDIR_CUSTOM2)
		348	{
		349	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		350	AV *avent = newAV ();
		351
		352	av_extend (avent, 2);
		353
		354	if (!sv_type [ent->type])
		355	{
		356	sv_type [ent->type] = newSViv (ent->type);
		357	SvREADONLY_on (sv_type [ent->type]);
		358	}
		359
		360	av_store (avent, 0, namesv);
		361	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		362	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		363
		364	av_store (av, i, newRV_noinc ((SV *)avent));
		365	}
		366	else
		367	av_store (av, i, namesv);
		368
		369	++ent;
		370	}
		371	else
		372	{
320	SV *sv = newSVpv (buf, 0);	373	SV *name = newSVpv (names, 0);
321
322	av_push (av, sv);	374	av_store (av, i, name);
323	buf += SvCUR (sv) + 1;	375	names += SvCUR (name) + 1;
324	req->result--;	376	}
325	}	377	}
326		378
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	379	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	380	}
329		381
330	PUSHs (rv);	382	PUSHs (rv);
		383
		384	if (req->int1 & EIO_READDIR_CUSTOM1)
		385	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
331	}	386	}
332	break;	387	break;
333		388
334	case REQ_OPEN:	389	case EIO_OPEN:
335	{	390	{
336	/* convert fd to fh */	391	/* convert fd to fh */
337	SV *fh;	392	SV *fh = &PL_sv_undef;
338		393
339	PUSHs (sv_2mortal (newSViv (req->result)));	394	if (req->result >= 0)
340	PUTBACK;	395	{
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	396	GV *gv = (GV *)sv_newmortal ();
342	SPAGAIN;	397	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		398	char sym [64];
		399	int symlen;
		400
		401	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		402	gv_init (gv, aio_stash, sym, symlen, 0);
343		403
344	fh = SvREFCNT_inc (POPs);	404	symlen = snprintf (
		405	sym,
		406	sizeof (sym),
		407	"%s&=%d",
		408	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		409	(int)req->result
		410	);
345		411
		412	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		413	fh = (SV *)gv;
		414	}
		415
346	PUSHMARK (SP);	416	PUSHs (fh);
347	XPUSHs (sv_2mortal (fh));
348	}	417	}
349	break;	418	break;
350		419
		420	case EIO_STATVFS:
		421	case EIO_FSTATVFS:
		422	{
		423	SV *rv = &PL_sv_undef;
		424
		425	if (req->result >= 0)
		426	{
		427	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		428	HV *hv = newHV ();
		429
		430	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		431
		432	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		433	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		434	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		435	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		436	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		437	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		438	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		439	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		440	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		441	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		442	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		443	}
		444
		445	PUSHs (rv);
		446	}
		447
		448	break;
		449
351	case REQ_GROUP:	450	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	451	req->int1 = 2; /* mark group as finished */
353		452
354	if (req->data)	453	if (req->sv1)
355	{	454	{
356	int i;	455	int i;
357	AV *av = (AV *)req->data;	456	AV *av = (AV *)req->sv1;
358		457
359	EXTEND (SP, AvFILL (av) + 1);	458	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	459	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	460	PUSHs (*av_fetch (av, i, 0));
362	}	461	}
363	break;	462	break;
364		463
365	case REQ_NOP:	464	case EIO_NOP:
366	case REQ_SLEEP:	465	case EIO_BUSY:
367	break;	466	break;
		467
		468	case EIO_READLINK:
		469	if (req->result > 0)
		470	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		471	break;
		472
		473	case EIO_STAT:
		474	case EIO_LSTAT:
		475	case EIO_FSTAT:
		476	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		477	PL_laststatval = req->result;
		478	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		479	PUSHs (sv_2mortal (newSViv (req->result)));
		480	break;
		481
		482	case EIO_READ:
		483	{
		484	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		485	*SvEND (req->sv2) = 0;
		486	SvPOK_only (req->sv2);
		487	SvSETMAGIC (req->sv2);
		488	PUSHs (sv_2mortal (newSViv (req->result)));
		489	}
		490	break;
		491
		492	case EIO_DUP2:
		493	if (req->result > 0)
		494	req->result = 0;
		495	/* FALLTHROUGH */
368		496
369	default:	497	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	498	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	499	break;
372	}	500	}
373		501
		502	errno = req->errorno;
374		503
375	PUTBACK;	504	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	505	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	506	SPAGAIN;
378		507
379	FREETMPS;	508	FREETMPS;
380	LEAVE;	509	LEAVE;
		510
		511	PUTBACK;
381	}	512	}
382		513
383	if (req->grp)	514	return !!SvTRUE (ERRSV);
384	{
385	aio_req grp = req->grp;
386
387	/* unlink request */
388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
390
391	if (grp->grp_first == req)
392	grp->grp_first = req->grp_next;
393
394	aio_grp_dec (grp);
395	}
396
397	if (SvTRUE (ERRSV))
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	515	}
403		516
404	static void req_free (aio_req req)	517	static void req_destroy (aio_req req)
405	{	518	{
406	if (req->self)	519	if (req->self)
407	{	520	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	521	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	522	SvREFCNT_dec (req->self);
410	}	523	}
411		524
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	525	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	526	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	527	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420		528
421	Safefree (req);	529	Safefree (req);
422	}	530	}
423		531
424	static void req_cancel (aio_req req)	532	static void req_cancel_subs (aio_req grp)
425	{	533	{
426	req->flags |= FLAG_CANCELLED;	534	aio_req sub;
427		535
428	if (req->type == REQ_GROUP)	536	if (grp->type != EIO_GROUP)
		537	return;
		538
		539	SvREFCNT_dec (grp->sv2);
		540	grp->sv2 = 0;
		541
		542	eio_grp_cancel (grp);
		543	}
		544
		545	static void
		546	create_respipe (void)
		547	{
		548	if (s_epipe_renew (&respipe))
		549	croak ("IO::AIO: unable to initialize result pipe");
		550	}
		551
		552	static void poll_wait (void)
		553	{
		554	while (eio_nreqs ())
429	{	555	{
430	aio_req sub;	556	int size;
431		557
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	558	X_LOCK (reslock);
433	req_cancel (sub);	559	size = res_queue.size;
		560	X_UNLOCK (reslock);
		561
		562	if (size)
		563	return;
		564
		565	etp_maybe_start_thread ();
		566
		567	s_epipe_wait (&respipe);
434	}	568	}
435	}	569	}
436		570
437	static int poll_cb ()	571	static int poll_cb (void)
438	{	572	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	573	for (;;)
445	{	574	{
446	pthread_mutex_lock (&reslock);	575	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		576
449	if (req)	577	if (res > 0)
450	{
451	if (!res_queue.size)
452	{
453	/* read any signals sent by the worker threads */
454	char buf [32];
455	while (read (respipe [0], buf, 32) == 32)
456	;
457	}
458	}
459
460	pthread_mutex_unlock (&reslock);
461
462	if (!req)
463	break;	578	croak (0);
464		579
465	--nreqs;	580	if (!max_outstanding || max_outstanding > eio_nreqs ())
		581	return res;
466		582
467	if (req->type == REQ_QUIT)	583	poll_wait ();
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{
471	req->fd = 1; /* mark request as delayed */
472	continue;
473	}
474	else
475	{
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	584	}
496
497	return count;
498	}	585	}
499		586
500	static void *aio_proc(void *arg);
501
502	static void start_thread (void)	587	static void atfork_child (void)
503	{	588	{
504	sigset_t fullsigset, oldsigset;	589	create_respipe ();
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}
520
521	static void req_send (aio_req req)
522	{
523	while (started < wanted && nreqs >= started)
524	start_thread ();
525
526	++nreqs;
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{
572	end_thread ();
573	cur--;
574	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}
582
583	static void create_pipe ()
584	{
585	if (pipe (respipe))
586	croak ("unable to initialize result pipe");
587
588	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
589	croak ("cannot set result pipe to nonblocking mode");
590
591	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593	}	590	}
594		591
595	/*****************************************************************************/	592	/*****************************************************************************/
596	/* work around various missing functions */
597		593
598	#if !HAVE_PREADWRITE	594	#define MMAP_MAGIC PERL_MAGIC_ext
599	# define pread aio_pread
600	# define pwrite aio_pwrite
601		595
602	/*	596	static int
603	* make our pread/pwrite safe against themselves, but not against	597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
604	* normal read/write by using a mutex. slows down execution a lot,
605	* but that's your problem, not mine.
606	*/
607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
608
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{	598	{
611	ssize_t res;	599	int old_errno = errno;
612	off_t ooffset;	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
613
614	pthread_mutex_lock (&preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);
620
621	return res;
622	}
623
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{
626	ssize_t res;
627	off_t ooffset;
628
629	pthread_mutex_lock (&preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);
635
636	return res;
637	}
638	#endif
639
640	#if !HAVE_FDATASYNC
641	# define fdatasync fsync
642	#endif
643
644	#if !HAVE_READAHEAD
645	# define readahead aio_readahead
646
647	static ssize_t readahead (int fd, off_t offset, size_t count)
648	{
649	dBUF;
650
651	while (count > 0)
652	{
653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
654
655	pread (fd, aio_buf, len, offset);
656	offset += len;
657	count -= len;
658	}
659
660	fBUF;
661
662	errno = 0;
663	}
664	#endif
665
666	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r
668
669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
670
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672	{
673	struct dirent *e;
674	int errorno;
675
676	pthread_mutex_lock (&readdirlock);
677
678	e = readdir (dirp);
679	errorno = errno;	601	errno = old_errno;
680		602
681	if (e)	603	mg->mg_obj = 0; /* just in case */
682	{
683	*res = ent;
684	strcpy (ent->d_name, e->d_name);
685	}
686	else
687	*res = 0;
688		604
689	pthread_mutex_unlock (&readdirlock);	605	SvREADONLY_off (sv);
		606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
690		610
691	errno = errorno;
692	return e ? 0 : -1;
693	}
694	#endif
695
696	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
698	{
699	ssize_t res;
700
701	if (!count)
702	return 0;	611	return 0;
703
704	#if HAVE_SENDFILE
705	# if __linux
706	res = sendfile (ofd, ifd, &offset, count);
707
708	# elif __freebsd
709	/*
710	* Of course, the freebsd sendfile is a dire hack with no thoughts
711	* wasted on making it similar to other I/O functions.
712	*/
713	{
714	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716
717	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
719	res = sbytes;
720	}
721
722	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);
724
725	# elif __solaris
726	{
727	struct sendfilevec vec;
728	size_t sbytes;
729
730	vec.sfv_fd = ifd;
731	vec.sfv_flag = 0;
732	vec.sfv_off = offset;
733	vec.sfv_len = count;
734
735	res = sendfilev (ofd, &vec, 1, &sbytes);
736
737	if (res < 0 && sbytes)
738	res = sbytes;
739	}
740
741	# endif
742	#else
743	res = -1;
744	errno = ENOSYS;
745	#endif
746
747	if (res < 0
748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
749	#if __solaris
750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
751	#endif
752	)
753	)
754	{
755	/* emulate sendfile. this is a major pain in the ass */
756	dBUF;
757
758	res = 0;
759
760	while (count)
761	{
762	ssize_t cnt;
763
764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
765
766	if (cnt <= 0)
767	{
768	if (cnt && !res) res = -1;
769	break;
770	}
771
772	cnt = write (ofd, aio_buf, cnt);
773
774	if (cnt <= 0)
775	{
776	if (cnt && !res) res = -1;
777	break;
778	}
779
780	offset += cnt;
781	res += cnt;
782	count -= cnt;
783	}
784
785	fBUF;
786	}
787
788	return res;
789	}	612	}
790		613
791	/* read a full directory */	614	static MGVTBL mmap_vtbl = {
792	static int scandir_ (const char *path, void **namesp)	615	0, 0, 0, 0, mmap_free
793	{	616	};
794	DIR *dirp;
795	union
796	{
797	struct dirent d;
798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
799	} *u;
800	struct dirent *entp;
801	char *name, *names;
802	int memlen = 4096;
803	int memofs = 0;
804	int res = 0;
805	int errorno;
806
807	dirp = opendir (path);
808	if (!dirp)
809	return -1;
810
811	u = malloc (sizeof (*u));
812	names = malloc (memlen);
813
814	if (u && names)
815	for (;;)
816	{
817	errno = 0;
818	readdir_r (dirp, &u->d, &entp);
819
820	if (!entp)
821	break;
822
823	name = entp->d_name;
824
825	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
826	{
827	int len = strlen (name) + 1;
828
829	res++;
830
831	while (memofs + len > memlen)
832	{
833	memlen *= 2;
834	names = realloc (names, memlen);
835	if (!names)
836	break;
837	}
838
839	memcpy (names + memofs, name, len);
840	memofs += len;
841	}
842	}
843
844	errorno = errno;
845	free (u);
846	closedir (dirp);
847
848	if (errorno)
849	{
850	free (names);
851	errno = errorno;
852	res = -1;
853	}
854
855	*namesp = (void *)names;
856	return res;
857	}
858		617
859	/*****************************************************************************/	618	/*****************************************************************************/
860		619
861	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
862	{	622	{
863	aio_req req;	623	SvGETMAGIC (cb_sv);
864	int type;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
865
866	do
867	{
868	pthread_mutex_lock (&reqlock);
869
870	for (;;)
871	{
872	req = reqq_shift (&req_queue);
873
874	if (req)
875	break;
876
877	pthread_cond_wait (&reqwait, &reqlock);
878	}
879
880	pthread_mutex_unlock (&reqlock);
881
882	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884
885	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)
887	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
890
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
893
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
897
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
905
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
909
910	case REQ_SLEEP:
911	{
912	struct timeval tv;
913
914	tv.tv_sec = req->fd;
915	tv.tv_usec = req->fd2;
916
917	req->result = select (0, 0, 0, 0, &tv);
918	}
919
920	case REQ_GROUP:
921	case REQ_NOP:
922	case REQ_QUIT:
923	break;
924
925	default:
926	req->result = ENOSYS;
927	break;
928	}
929
930	req->errorno = errno;
931
932	pthread_mutex_lock (&reslock);
933
934	if (!reqq_push (&res_queue, req))
935	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);
937
938	pthread_mutex_unlock (&reslock);
939	}
940	while (type != REQ_QUIT);
941
942	return 0;
943	}
944
945	/*****************************************************************************/
946
947	static void atfork_prepare (void)
948	{
949	pthread_mutex_lock (&reqlock);
950	pthread_mutex_lock (&reslock);
951	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);
953	#endif
954	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);
956	#endif
957	}
958
959	static void atfork_parent (void)
960	{
961	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);
963	#endif
964	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);
966	#endif
967	pthread_mutex_unlock (&reslock);
968	pthread_mutex_unlock (&reqlock);
969	}
970
971	static void atfork_child (void)
972	{
973	aio_req prv;
974
975	started = 0;
976
977	while (prv = reqq_shift (&req_queue))
978	req_free (prv);
979
980	while (prv = reqq_shift (&res_queue))
981	req_free (prv);
982
983	close (respipe [0]);
984	close (respipe [1]);
985	create_pipe ();
986
987	atfork_parent ();
988	}	625	}
989		626
990	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
991	aio_req req; \	629	aio_req req; \
992	int req_pri = next_pri; \	630	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \	631	next_pri = EIO_PRI_DEFAULT; \
994	\	632	\
995	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
996	croak ("callback must be undef or of reference type"); \
997	\	634	\
998	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
999	if (!req) \	636	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
1001	\	638	\
1002	req->callback = newSVsv (callback); \	639	req->callback = SvREFCNT_inc (cb_cv); \
1003	req->pri = req_pri	640	req->pri = req_pri
1004		641
1005	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
1006	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
1007	\	646	\
1008	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
1010		649
1011	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
1012		651
1013	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
1014		653
1015	BOOT:	654	BOOT:
1016	{	655	{
		656	static const struct {
		657	const char *name;
		658	IV iv;
		659	} *civ, const_iv[] = {
		660	# define const_niv(name, value) { # name, (IV) value },
		661	# define const_iv(name) { # name, (IV) name },
		662	# define const_eio(name) { # name, (IV) EIO_ ## name },
		663	const_iv (EXDEV)
		664	const_iv (ENOSYS)
		665	const_iv (O_RDONLY)
		666	const_iv (O_WRONLY)
		667	const_iv (O_CREAT)
		668	const_iv (O_TRUNC)
		669	#ifndef _WIN32
		670	const_iv (S_IFIFO)
		671	#endif
		672	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		673	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		674	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		675	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		676	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		677	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		678
		679	const_iv (ST_RDONLY)
		680	const_iv (ST_NOSUID)
		681	const_iv (ST_NODEV)
		682	const_iv (ST_NOEXEC)
		683	const_iv (ST_SYNCHRONOUS)
		684	const_iv (ST_MANDLOCK)
		685	const_iv (ST_WRITE)
		686	const_iv (ST_APPEND)
		687	const_iv (ST_IMMUTABLE)
		688	const_iv (ST_NOATIME)
		689	const_iv (ST_NODIRATIME)
		690	const_iv (ST_RELATIME)
		691
		692	const_iv (PROT_EXEC)
		693	const_iv (PROT_NONE)
		694	const_iv (PROT_READ)
		695	const_iv (PROT_WRITE)
		696
		697	/*const_iv (MAP_FIXED)*/
		698	const_iv (MAP_PRIVATE)
		699	const_iv (MAP_SHARED)
		700	const_iv (MAP_ANONYMOUS)
		701
		702	/* linuxish */
		703	const_iv (MAP_HUGETLB)
		704	const_iv (MAP_LOCKED)
		705	const_iv (MAP_NORESERVE)
		706	const_iv (MAP_POPULATE)
		707	const_iv (MAP_NONBLOCK)
		708
		709	const_iv (MCL_FUTURE)
		710	const_iv (MCL_CURRENT)
		711
		712	const_eio (MS_ASYNC)
		713	const_eio (MS_INVALIDATE)
		714	const_eio (MS_SYNC)
		715
		716	const_eio (MT_MODIFY)
		717
		718	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		719	const_eio (SYNC_FILE_RANGE_WRITE)
		720	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		721
		722	const_eio (READDIR_DENTS)
		723	const_eio (READDIR_DIRS_FIRST)
		724	const_eio (READDIR_STAT_ORDER)
		725	const_eio (READDIR_FOUND_UNKNOWN)
		726
		727	const_eio (DT_UNKNOWN)
		728	const_eio (DT_FIFO)
		729	const_eio (DT_CHR)
		730	const_eio (DT_DIR)
		731	const_eio (DT_BLK)
		732	const_eio (DT_REG)
		733	const_eio (DT_LNK)
		734	const_eio (DT_SOCK)
		735	const_eio (DT_WHT)
		736	};
		737
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	738	aio_stash = gv_stashpv ("IO::AIO" , 1);
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	739	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	740	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1021		741
		742	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		743	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		744
		745	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		746
1022	create_pipe ();	747	create_respipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025		748
		749	if (eio_init (want_poll, done_poll) < 0)
		750	croak ("IO::AIO: unable to initialise eio library");
		751
		752	/* atfork child called in fifo order, so before eio's handler */
		753	X_THREAD_ATFORK (0, 0, atfork_child);
		754	}
		755
1026	void	756	void
1027	min_parallel (nthreads)	757	max_poll_reqs (int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	758	PROTOTYPE: $
		759	CODE:
		760	eio_set_max_poll_reqs (nreqs);
1030		761
1031	void	762	void
1032	max_parallel (nthreads)	763	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	764	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	765	CODE:
1041	RETVAL = max_outstanding;	766	eio_set_max_poll_time (nseconds);
		767
		768	void
		769	min_parallel (int nthreads)
		770	PROTOTYPE: $
		771	CODE:
		772	eio_set_min_parallel (nthreads);
		773
		774	void
		775	max_parallel (int nthreads)
		776	PROTOTYPE: $
		777	CODE:
		778	eio_set_max_parallel (nthreads);
		779
		780	void
		781	max_idle (int nthreads)
		782	PROTOTYPE: $
		783	CODE:
		784	eio_set_max_idle (nthreads);
		785
		786	void
		787	max_outstanding (int maxreqs)
		788	PROTOTYPE: $
		789	CODE:
1042	max_outstanding = nreqs;	790	max_outstanding = maxreqs;
1043		791
1044	void	792	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	793	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1046	SV * pathname
1047	int flags
1048	int mode
1049	SV * callback
1050	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
1051	PPCODE:	795	PPCODE:
1052	{	796	{
1053	dREQ;	797	dREQ;
1054		798
1055	req->type = REQ_OPEN;	799	req->type = EIO_OPEN;
1056	req->data = newSVsv (pathname);	800	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	801	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	802	req->int1 = flags;
1059	req->mode = mode;	803	req->int2 = mode;
1060		804
1061	REQ_SEND;	805	REQ_SEND;
1062	}	806	}
1063		807
1064	void	808	void
1065	aio_close (fh,callback=&PL_sv_undef)	809	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$	810	PROTOTYPE: $;$
1069	ALIAS:	811	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC	812	aio_fsync = EIO_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC	813	aio_fdatasync = EIO_FDATASYNC
1073	PPCODE:	814	PPCODE:
1074	{	815	{
		816	int fd = s_fileno_croak (fh, 0);
1075	dREQ;	817	dREQ;
1076		818
1077	req->type = ix;	819	req->type = ix;
1078	req->fh = newSVsv (fh);	820	req->sv1 = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	821	req->int1 = fd;
1080		822
1081	REQ_SEND (req);	823	REQ_SEND (req);
1082	}	824	}
1083		825
1084	void	826	void
		827	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		828	PROTOTYPE: $$$$;$
		829	PPCODE:
		830	{
		831	int fd = s_fileno_croak (fh, 0);
		832	dREQ;
		833
		834	req->type = EIO_SYNC_FILE_RANGE;
		835	req->sv1 = newSVsv (fh);
		836	req->int1 = fd;
		837	req->offs = offset;
		838	req->size = nbytes;
		839	req->int2 = flags;
		840
		841	REQ_SEND (req);
		842	}
		843
		844	void
		845	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		846	PROTOTYPE: $;$
		847	PPCODE:
		848	{
		849	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		850	int fd = s_fileno_croak (fh, 0);
		851	dREQ;
		852
		853	if (close_pipe < 0)
		854	{
		855	int pipefd [2];
		856
		857	if (pipe (pipefd) < 0
		858	|| close (pipefd [1]) < 0
		859	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		860	abort (); /*D*/
		861
		862	close_pipe = pipefd [0];
		863	}
		864
		865	req->type = EIO_DUP2;
		866	req->int1 = close_pipe;
		867	req->sv2 = newSVsv (fh);
		868	req->int2 = fd;
		869
		870	REQ_SEND (req);
		871	}
		872
		873	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	874	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1086	SV * fh
1087	UV offset
1088	UV length
1089	SV * data
1090	UV dataoffset
1091	SV * callback
1092	ALIAS:	875	ALIAS:
1093	aio_read = REQ_READ	876	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	877	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$	878	PROTOTYPE: $$$$$;$
1096	PPCODE:	879	PPCODE:
1097	{	880	{
1098	aio_req req;
1099	STRLEN svlen;	881	STRLEN svlen;
		882	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1100	char *svptr = SvPVbyte (data, svlen);	883	char *svptr = SvPVbyte (data, svlen);
1101		884	UV len = SvUV (length);
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104		885
1105	if (dataoffset < 0)	886	if (dataoffset < 0)
1106	dataoffset += svlen;	887	dataoffset += svlen;
1107		888
1108	if (dataoffset < 0 || dataoffset > svlen)	889	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	890	croak ("dataoffset outside of data scalar");
1110		891
1111	if (ix == REQ_WRITE)	892	if (ix == EIO_WRITE)
1112	{	893	{
1113	/* write: check length and adjust. */	894	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	895	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	896	len = svlen - dataoffset;
1116	}	897	}
1117	else	898	else
1118	{	899	{
1119	/* read: grow scalar as necessary */	900	/* read: check type and grow scalar as necessary */
		901	SvUPGRADE (data, SVt_PV);
1120	svptr = SvGROW (data, length + dataoffset);	902	svptr = SvGROW (data, len + dataoffset + 1);
1121	}	903	}
1122
1123	if (length < 0)
1124	croak ("length must not be negative");
1125		904
1126	{	905	{
1127	dREQ;	906	dREQ;
1128		907
1129	req->type = ix;	908	req->type = ix;
1130	req->fh = newSVsv (fh);	909	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	910	req->int1 = fd;
1132	: IoOFP (sv_2io (fh)));	911	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	912	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	913	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	914	req->ptr2 = (char *)svptr + dataoffset;
		915	req->stroffset = dataoffset;
1137		916
1138	if (!SvREADONLY (data))	917	if (!SvREADONLY (data))
1139	{	918	{
1140	SvREADONLY_on (data);	919	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	920	req->flags |= FLAG_SV2_RO_OFF;
1142	}	921	}
1143		922
1144	REQ_SEND;	923	REQ_SEND;
1145	}	924	}
1146	}	925	}
1147		926
1148	void	927	void
		928	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		929	PROTOTYPE: $$;$
		930	PPCODE:
		931	{
		932	SV *data;
		933	dREQ;
		934
		935	req->type = EIO_READLINK;
		936	req->sv1 = newSVsv (path);
		937	req->ptr1 = SvPVbyte_nolen (req->sv1);
		938
		939	REQ_SEND;
		940	}
		941
		942	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	943	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1150	SV * out_fh
1151	SV * in_fh
1152	UV in_offset
1153	UV length
1154	SV * callback
1155	PROTOTYPE: $$$$;$	944	PROTOTYPE: $$$$;$
1156	PPCODE:	945	PPCODE:
1157	{	946	{
		947	int ifd = s_fileno_croak (in_fh , 0);
		948	int ofd = s_fileno_croak (out_fh, 1);
1158	dREQ;	949	dREQ;
1159		950
1160	req->type = REQ_SENDFILE;	951	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	952	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	953	req->int1 = ofd;
1163	req->fh2 = newSVsv (in_fh);	954	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	955	req->int2 = ifd;
1165	req->offset = in_offset;	956	req->offs = in_offset;
1166	req->length = length;	957	req->size = length;
1167		958
1168	REQ_SEND;	959	REQ_SEND;
1169	}	960	}
1170		961
1171	void	962	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	963	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$	964	PROTOTYPE: $$$;$
1178	PPCODE:	965	PPCODE:
1179	{	966	{
		967	int fd = s_fileno_croak (fh, 0);
1180	dREQ;	968	dREQ;
1181		969
1182	req->type = REQ_READAHEAD;	970	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	972	req->int1 = fd;
1185	req->offset = offset;	973	req->offs = offset;
1186	req->length = length;	974	req->size = length;
1187		975
1188	REQ_SEND;	976	REQ_SEND;
1189	}	977	}
1190		978
1191	void	979	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	980	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	981	ALIAS:
1196	aio_stat = REQ_STAT	982	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	983	aio_lstat = EIO_LSTAT
		984	aio_statvfs = EIO_STATVFS
1198	PPCODE:	985	PPCODE:
1199	{	986	{
1200	dREQ;	987	dREQ;
1201		988
1202	New (0, req->statdata, 1, Stat_t);	989	req->sv1 = newSVsv (fh_or_path);
1203	if (!req->statdata)
1204	{
1205	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");
1207	}
1208		990
1209	if (SvPOK (fh_or_path))	991	if (SvPOK (req->sv1))
1210	{	992	{
1211	req->type = ix;	993	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	994	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	995	}
1215	else	996	else
1216	{	997	{
1217	req->type = REQ_FSTAT;	998	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1218	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	999	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	1000	}
1221		1001
1222	REQ_SEND;	1002	REQ_SEND;
1223	}	1003	}
1224		1004
1225	void	1005	void
		1006	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1007	PPCODE:
		1008	{
		1009	dREQ;
		1010
		1011	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1012	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1013	req->sv1 = newSVsv (fh_or_path);
		1014
		1015	if (SvPOK (req->sv1))
		1016	{
		1017	req->type = EIO_UTIME;
		1018	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1019	}
		1020	else
		1021	{
		1022	req->type = EIO_FUTIME;
		1023	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1024	}
		1025
		1026	REQ_SEND;
		1027	}
		1028
		1029	void
		1030	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1031	PPCODE:
		1032	{
		1033	dREQ;
		1034
		1035	req->sv1 = newSVsv (fh_or_path);
		1036	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1037
		1038	if (SvPOK (req->sv1))
		1039	{
		1040	req->type = EIO_TRUNCATE;
		1041	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1042	}
		1043	else
		1044	{
		1045	req->type = EIO_FTRUNCATE;
		1046	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1047	}
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1054	ALIAS:
		1055	aio_chmod = EIO_CHMOD
		1056	aio_mkdir = EIO_MKDIR
		1057	PPCODE:
		1058	{
		1059	dREQ;
		1060
		1061	req->int2 = mode;
		1062	req->sv1 = newSVsv (fh_or_path);
		1063
		1064	if (SvPOK (req->sv1))
		1065	{
		1066	req->type = ix;
		1067	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1068	}
		1069	else
		1070	{
		1071	req->type = EIO_FCHMOD;
		1072	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1073	}
		1074
		1075	REQ_SEND;
		1076	}
		1077
		1078	void
		1079	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1080	PPCODE:
		1081	{
		1082	dREQ;
		1083
		1084	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1085	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1086	req->sv1 = newSVsv (fh_or_path);
		1087
		1088	if (SvPOK (req->sv1))
		1089	{
		1090	req->type = EIO_CHOWN;
		1091	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1092	}
		1093	else
		1094	{
		1095	req->type = EIO_FCHOWN;
		1096	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1097	}
		1098
		1099	REQ_SEND;
		1100	}
		1101
		1102	void
		1103	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	dREQ;
		1107
		1108	req->type = EIO_READDIR;
		1109	req->sv1 = newSVsv (pathname);
		1110	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1111	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1112
		1113	if (flags & EIO_READDIR_DENTS)
		1114	req->int1 |= EIO_READDIR_CUSTOM2;
		1115
		1116	REQ_SEND;
		1117	}
		1118
		1119	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	1120	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	1121	ALIAS:
1230	aio_unlink = REQ_UNLINK	1122	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	1123	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	1124	aio_readdir = EIO_READDIR
1233	PPCODE:	1125	PPCODE:
1234	{	1126	{
1235	dREQ;	1127	dREQ;
1236		1128
1237	req->type = ix;	1129	req->type = ix;
1238	req->data = newSVsv (pathname);	1130	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	1131	req->ptr1 = SvPVbyte_nolen (req->sv1);
1240		1132
1241	REQ_SEND;	1133	REQ_SEND;
1242	}	1134	}
1243		1135
1244	void	1136	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1137	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1246	SV * oldpath
1247	SV * newpath
1248	SV * callback
1249	ALIAS:	1138	ALIAS:
1250	aio_link = REQ_LINK	1139	aio_link = EIO_LINK
1251	aio_symlink = REQ_SYMLINK	1140	aio_symlink = EIO_SYMLINK
1252	aio_rename = REQ_RENAME	1141	aio_rename = EIO_RENAME
1253	PPCODE:	1142	PPCODE:
1254	{	1143	{
1255	dREQ;	1144	dREQ;
1256		1145
1257	req->type = ix;	1146	req->type = ix;
1258	req->fh = newSVsv (oldpath);	1147	req->sv1 = newSVsv (oldpath);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	1148	req->ptr1 = SvPVbyte_nolen (req->sv1);
1260	req->data = newSVsv (newpath);	1149	req->sv2 = newSVsv (newpath);
1261	req->dataptr = SvPVbyte_nolen (req->data);	1150	req->ptr2 = SvPVbyte_nolen (req->sv2);
1262		1151
1263	REQ_SEND;	1152	REQ_SEND;
1264	}	1153	}
1265		1154
1266	void	1155	void
1267	aio_sleep (delay,callback=&PL_sv_undef)	1156	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	1157	PPCODE:
1271	{	1158	{
1272	dREQ;	1159	dREQ;
1273		1160
1274	req->type = REQ_SLEEP;	1161	req->type = EIO_MKNOD;
1275	req->fd = delay < 0. ? 0 : delay;	1162	req->sv1 = newSVsv (pathname);
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
1277		1164	req->int2 = (mode_t)mode;
		1165	req->offs = dev;
		1166
1278	REQ_SEND;	1167	REQ_SEND;
1279	}	1168	}
1280		1169
1281	void	1170	void
		1171	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1172	ALIAS:
		1173	aio_mtouch = EIO_MTOUCH
		1174	aio_msync = EIO_MSYNC
		1175	PROTOTYPE: $$$$;$
		1176	PPCODE:
		1177	{
		1178	STRLEN svlen;
		1179	UV len = SvUV (length);
		1180	char *svptr = SvPVbyte (data, svlen);
		1181
		1182	if (offset < 0)
		1183	offset += svlen;
		1184
		1185	if (offset < 0 || offset > svlen)
		1186	croak ("offset outside of scalar");
		1187
		1188	if (!SvOK (length) || len + offset > svlen)
		1189	len = svlen - offset;
		1190
		1191	{
		1192	dREQ;
		1193
		1194	req->type = ix;
		1195	req->size = len;
		1196	req->sv2 = SvREFCNT_inc (data);
		1197	req->ptr2 = (char *)svptr + offset;
		1198	req->int1 = flags;
		1199
		1200	REQ_SEND;
		1201	}
		1202	}
		1203
		1204	void
		1205	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1206	PPCODE:
		1207	{
		1208	dREQ;
		1209
		1210	req->type = EIO_BUSY;
		1211	req->nv1 = delay < 0. ? 0. : delay;
		1212
		1213	REQ_SEND;
		1214	}
		1215
		1216	void
1282	aio_group (callback=&PL_sv_undef)	1217	aio_group (SV *callback=&PL_sv_undef)
1283	SV * callback
1284	PROTOTYPE: ;$	1218	PROTOTYPE: ;$
1285	PPCODE:	1219	PPCODE:
1286	{	1220	{
1287	dREQ;	1221	dREQ;
1288		1222
1289	req->type = REQ_GROUP;	1223	req->type = EIO_GROUP;
		1224
1290	req_send (req);	1225	req_submit (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1226	XPUSHs (req_sv (req, aio_grp_stash));
1293	}	1227	}
1294		1228
1295	void	1229	void
1296	aio_nop (callback=&PL_sv_undef)	1230	aio_nop (SV *callback=&PL_sv_undef)
1297	SV * callback	1231	ALIAS:
		1232	aio_nop = EIO_NOP
		1233	aio_sync = EIO_SYNC
1298	PPCODE:	1234	PPCODE:
1299	{	1235	{
1300	dREQ;	1236	dREQ;
1301		1237
1302	req->type = REQ_NOP;	1238	req->type = ix;
1303		1239
1304	REQ_SEND;	1240	REQ_SEND;
1305	}	1241	}
1306		1242
1307	void	1243	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1244	aioreq_pri (int pri = 0)
		1245	PROTOTYPE: ;$
1309	CODE:	1246	CODE:
		1247	RETVAL = next_pri;
		1248	if (items > 0)
		1249	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1250	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1251	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1252	next_pri = pri;
		1253	}
		1254	OUTPUT:
		1255	RETVAL
		1256
		1257	void
		1258	aioreq_nice (int nice = 0)
		1259	CODE:
		1260	nice = next_pri - nice;
		1261	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1262	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1263	next_pri = nice;
1313		1264
1314	void	1265	void
1315	flush ()	1266	flush ()
1316	PROTOTYPE:	1267	PROTOTYPE:
1317	CODE:	1268	CODE:
1318	while (nreqs)	1269	while (eio_nreqs ())
1319	{	1270	{
1320	poll_wait ();	1271	poll_wait ();
1321	poll_cb ();	1272	poll_cb ();
1322	}	1273	}
1323		1274
1324	void	1275	int
1325	poll()	1276	poll()
1326	PROTOTYPE:	1277	PROTOTYPE:
1327	CODE:	1278	CODE:
1328	if (nreqs)
1329	{
1330	poll_wait ();	1279	poll_wait ();
1331	poll_cb ();	1280	RETVAL = poll_cb ();
1332	}	1281	OUTPUT:
		1282	RETVAL
1333		1283
1334	int	1284	int
1335	poll_fileno()	1285	poll_fileno()
1336	PROTOTYPE:	1286	PROTOTYPE:
1337	CODE:	1287	CODE:
1338	RETVAL = respipe [0];	1288	RETVAL = s_epipe_fd (&respipe);
1339	OUTPUT:	1289	OUTPUT:
1340	RETVAL	1290	RETVAL
1341		1291
1342	int	1292	int
1343	poll_cb(...)	1293	poll_cb(...)
…		…
1349		1299
1350	void	1300	void
1351	poll_wait()	1301	poll_wait()
1352	PROTOTYPE:	1302	PROTOTYPE:
1353	CODE:	1303	CODE:
1354	if (nreqs)
1355	poll_wait ();	1304	poll_wait ();
1356		1305
1357	int	1306	int
1358	nreqs()	1307	nreqs()
1359	PROTOTYPE:	1308	PROTOTYPE:
1360	CODE:	1309	CODE:
1361	RETVAL = nreqs;	1310	RETVAL = eio_nreqs ();
1362	OUTPUT:	1311	OUTPUT:
1363	RETVAL	1312	RETVAL
1364		1313
		1314	int
		1315	nready()
		1316	PROTOTYPE:
		1317	CODE:
		1318	RETVAL = eio_nready ();
		1319	OUTPUT:
		1320	RETVAL
		1321
		1322	int
		1323	npending()
		1324	PROTOTYPE:
		1325	CODE:
		1326	RETVAL = eio_npending ();
		1327	OUTPUT:
		1328	RETVAL
		1329
		1330	int
		1331	nthreads()
		1332	PROTOTYPE:
		1333	CODE:
		1334	RETVAL = eio_nthreads ();
		1335	OUTPUT:
		1336	RETVAL
		1337
		1338	int
		1339	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1340	PROTOTYPE: $$$$
		1341	CODE:
		1342	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1343	RETVAL = posix_fadvise (fh, offset, length, advice);
		1344	#else
		1345	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1346	#endif
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	ssize_t
		1351	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1352	PROTOTYPE: $$$$
		1353	CODE:
		1354	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1355	OUTPUT:
		1356	RETVAL
		1357
		1358	void
		1359	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1360	PROTOTYPE: $$$$$;$
		1361	PPCODE:
		1362	sv_unmagic (scalar, MMAP_MAGIC);
		1363	{
		1364	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1365	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1366	if (addr == (void *)-1)
		1367	XSRETURN_NO;
		1368
		1369	/* we store the length in mg_obj, as namlen is I32 :/ */
		1370	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1371	->mg_obj = (SV *)length;
		1372
		1373	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1374	if (!(prot & PROT_WRITE))
		1375	SvREADONLY_on (scalar);
		1376
		1377	SvPVX (scalar) = (char *)addr;
		1378	SvCUR_set (scalar, length);
		1379	SvLEN_set (scalar, 0);
		1380	SvPOK_only (scalar);
		1381
		1382	XSRETURN_YES;
		1383	}
		1384
		1385	void
		1386	munmap (SV *scalar)
		1387	PROTOTYPE: $
		1388	CODE:
		1389	sv_unmagic (scalar, MMAP_MAGIC);
		1390
		1391	int
		1392	mlockall (int flags)
		1393	PROTOTYPE: $
		1394	CODE:
		1395	#if _POSIX_MEMLOCK
		1396	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1397	extern int mallopt (int, int);
		1398	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1399	#endif
		1400	mlockall (flags);
		1401	#else
		1402	RETVAL = -1;
		1403	errno = ENOSYS;
		1404	#endif
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	munlockall ()
		1410	PROTOTYPE:
		1411	CODE:
		1412	#if _POSIX_MEMLOCK
		1413	munlockall ();
		1414	#else
		1415	RETVAL = -1;
		1416	errno = ENOSYS;
		1417	#endif
		1418	OUTPUT:
		1419	RETVAL
		1420
		1421	void _on_next_submit (SV *cb)
		1422	CODE:
		1423	SvREFCNT_dec (on_next_submit);
		1424	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1425
1365	PROTOTYPES: DISABLE	1426	PROTOTYPES: DISABLE
1366		1427
1367	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1428	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1368		1429
1369	void	1430	void
1370	cancel (aio_req_ornot req)	1431	cancel (aio_req_ornot req)
1371	CODE:	1432	CODE:
1372	req_cancel (req);	1433	eio_cancel (req);
1373		1434
1374	void	1435	void
1375	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1436	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1376	CODE:	1437	PPCODE:
		1438	{
		1439	if (GIMME_V != G_VOID)
		1440	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1441
		1442	if (items > 1)
		1443	{
		1444	SV *cb_cv =get_cb (callback);
		1445
1377	SvREFCNT_dec (req->callback);	1446	SvREFCNT_dec (req->callback);
1378	req->callback = newSVsv (callback);	1447	req->callback = SvREFCNT_inc (cb_cv);
		1448	}
		1449	}
1379		1450
1380	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1451	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1381		1452
1382	void	1453	void
1383	add (aio_req grp, ...)	1454	add (aio_req grp, ...)
1384	PPCODE:	1455	PPCODE:
1385	{	1456	{
1386	int i;	1457	int i;
1387	aio_req req;
1388		1458
1389	if (grp->fd == 2)	1459	if (grp->int1 == 2)
1390	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1460	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1391		1461
1392	for (i = 1; i < items; ++i )	1462	for (i = 1; i < items; ++i )
1393	{	1463	{
		1464	aio_req req;
		1465
1394	if (GIMME_V != G_VOID)	1466	if (GIMME_V != G_VOID)
1395	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1467	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1396		1468
1397	req = SvAIO_REQ (ST (i));	1469	req = SvAIO_REQ (ST (i));
1398		1470
1399	if (req)	1471	if (req)
1400	{	1472	eio_grp_add (grp, req);
1401	++grp->length;
1402	req->grp = grp;
1403
1404	req->grp_prev = 0;
1405	req->grp_next = grp->grp_first;
1406
1407	if (grp->grp_first)
1408	grp->grp_first->grp_prev = req;
1409
1410	grp->grp_first = req;
1411	}
1412	}	1473	}
1413	}	1474	}
		1475
		1476	void
		1477	cancel_subs (aio_req_ornot req)
		1478	CODE:
		1479	req_cancel_subs (req);
1414		1480
1415	void	1481	void
1416	result (aio_req grp, ...)	1482	result (aio_req grp, ...)
1417	CODE:	1483	CODE:
1418	{	1484	{
1419	int i;	1485	int i;
		1486	AV *av;
		1487
		1488	grp->errorno = errno;
		1489
1420	AV *av = newAV ();	1490	av = newAV ();
		1491	av_extend (av, items - 1);
1421		1492
1422	for (i = 1; i < items; ++i )	1493	for (i = 1; i < items; ++i )
1423	av_push (av, newSVsv (ST (i)));	1494	av_push (av, newSVsv (ST (i)));
1424		1495
1425	SvREFCNT_dec (grp->data);	1496	SvREFCNT_dec (grp->sv1);
1426	grp->data = (SV *)av;	1497	grp->sv1 = (SV *)av;
1427	}	1498	}
		1499
		1500	void
		1501	errno (aio_req grp, int errorno = errno)
		1502	CODE:
		1503	grp->errorno = errorno;
1428		1504
1429	void	1505	void
1430	limit (aio_req grp, int limit)	1506	limit (aio_req grp, int limit)
1431	CODE:	1507	CODE:
1432	grp->fd2 = limit;	1508	eio_grp_limit (grp, limit);
1433	aio_grp_feed (grp);
1434		1509
1435	void	1510	void
1436	feed (aio_req grp, SV *callback=&PL_sv_undef)	1511	feed (aio_req grp, SV *callback=&PL_sv_undef)
1437	CODE:	1512	CODE:
1438	{	1513	{
1439	SvREFCNT_dec (grp->fh2);	1514	SvREFCNT_dec (grp->sv2);
1440	grp->fh2 = newSVsv (callback);	1515	grp->sv2 = newSVsv (callback);
		1516	grp->feed = aio_grp_feed;
1441		1517
1442	if (grp->fd2 <= 0)	1518	if (grp->int2 <= 0)
1443	grp->fd2 = 2;	1519	grp->int2 = 2;
1444		1520
1445	aio_grp_feed (grp);	1521	eio_grp_limit (grp, grp->int2);
1446	}	1522	}
1447		1523

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