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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC vs.
Revision 1.164 by root, Tue May 4 21:14:01 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
26	#include <limits.h>	17	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	18	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	19	#include <sched.h>
31		20
32	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>	22	# include <sys/mman.h>
35	# elif __freebsd	23	#endif
36	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		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
		66	#else
		67
37	# include <sys/uio.h>	68	# include <sys/time.h>
38	# elif __hpux
39	# include <sys/socket.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		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	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
42	# else	186	# else
43	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	188	# endif
45	#endif	189	#endif
46		190	#ifndef MAP_HUGETLB
47	/* used for struct dirent, AIX doesn't provide it */	191	# define MAP_HUGETLB 0
48	#ifndef NAME_MAX
49	# define NAME_MAX 4096
50	#endif	192	#endif
51		193	#ifndef MAP_LOCKED
52	#if __ia64	194	# define MAP_LOCKED 0
53	# define STACKSIZE 65536
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
59		205
60	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
61	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
62		209
63	#define dBUF \	210	static int req_invoke (eio_req *req);
64	char *aio_buf = malloc (AIO_BUFSIZE); \	211	#define EIO_FINISH(req) req_invoke (req)
65	if (!aio_buf) \	212	static void req_destroy (eio_req *grp);
66	return -1;	213	#define EIO_DESTROY(req) req_destroy (req)
67
68	#define fBUF free (aio_buf)
69		214
70	enum {	215	enum {
71	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
72	REQ_OPEN, REQ_CLOSE,
73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
74	REQ_SENDFILE,
75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
76	REQ_FSYNC, REQ_FDATASYNC,
77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
78	REQ_READDIR,
79	REQ_LINK, REQ_SYMLINK,
80	REQ_GROUP, REQ_NOP,
81	REQ_BUSY,
82	};	217	};
83		218
84	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
85	#define AIO_GRP_KLASS "IO::AIO::GRP"
86		220
87	typedef struct aio_cb
88	{
89	struct aio_cb *volatile next;
90
91	SV *data, *callback;
92	SV *fh, *fh2;
93	void *dataptr, *data2ptr;
94	Stat_t *statdata;
95	off_t offset;
96	size_t length;
97	ssize_t result;
98
99	STRLEN dataoffset;
100	int type;
101	int fd, fd2;
102	int errorno;
103	mode_t mode; /* open */
104
105	unsigned char flags;
106	unsigned char pri;
107
108	SV *self; /* the perl counterpart of this request, if any */
109	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
110	} aio_cb;
111
112	enum {
113	FLAG_CANCELLED = 0x01,
114	};
115
116	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
117	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
118		223
119	enum {	224	static SV *on_next_submit;
120	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
121	PRI_MAX = 4,
122
123	DEFAULT_PRI = 0,
124	PRI_BIAS = -PRI_MIN,
125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
126	};
127
128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
129
130	static int started, wanted;
131	static volatile int nreqs;
132	static int max_outstanding = 1<<30;	226	static int max_outstanding;
133	static int respipe [2];
134		227
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	228	static s_epipe respipe;
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140		229
141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	230	static void req_destroy (aio_req req);
142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
144
145	/*
146	* a somewhat faster data structure might be nice, but
147	* with 8 priorities this actually needs <20 insns
148	* per shift, the most expensive operation.
149	*/
150	typedef struct {
151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
152	int size;
153	} reqq;
154
155	static reqq req_queue;
156	static reqq res_queue;
157
158	int reqq_push (reqq *q, aio_req req)
159	{
160	int pri = req->pri;
161	req->next = 0;
162
163	if (q->qe[pri])
164	{
165	q->qe[pri]->next = req;
166	q->qe[pri] = req;
167	}
168	else
169	q->qe[pri] = q->qs[pri] = req;
170
171	return q->size++;
172	}
173
174	aio_req reqq_shift (reqq *q)
175	{
176	int pri;
177
178	if (!q->size)
179	return 0;
180
181	--q->size;
182
183	for (pri = NUM_PRI; pri--; )
184	{
185	aio_req req = q->qs[pri];
186
187	if (req)
188	{
189	if (!(q->qs[pri] = req->next))
190	q->qe[pri] = 0;
191
192	return req;
193	}
194	}
195
196	abort ();
197	}
198
199	static void req_invoke (aio_req req);	231	static void req_cancel (aio_req req);
200	static void req_free (aio_req req);	232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
201		244
202	/* must be called at most once */	245	/* must be called at most once */
203	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
204	{	247	{
205	if (!req->self)	248	if (!req->self)
206	{	249	{
207	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
209	}	252	}
210		253
211	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
212	}	255	}
213		256
214	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
215	{	258	{
216	MAGIC *mg;	259	MAGIC *mg;
217		260
218	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
219	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
220		266
221	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
222		268
223	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
224	}	270	}
225		271
226	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
227	{	273	{
228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
229	{	275	{
230	int old_len = grp->length;
231
232	if (grp->fh2 && SvOK (grp->fh2))
233	{
234	dSP;	276	dSP;
235		277
236	ENTER;	278	ENTER;
237	SAVETMPS;	279	SAVETMPS;
238	PUSHMARK (SP);	280	PUSHMARK (SP);
239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
240	PUTBACK;	282	PUTBACK;
241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
242	SPAGAIN;	284	SPAGAIN;
243	FREETMPS;	285	FREETMPS;
244	LEAVE;	286	LEAVE;
245	}
246
247	/* stop if no progress has been made */
248	if (old_len == grp->length)
249	{
250	SvREFCNT_dec (grp->fh2);
251	grp->fh2 = 0;
252	break;
253	}
254	}	287	}
255	}	288	}
256		289
257	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
258	{	291	{
259	--grp->length;	292	eio_submit (req);
260		293
261	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
262	aio_grp_feed (grp);
263
264	/* finish, if done */
265	if (!grp->length && grp->fd)
266	{	295	{
267	req_invoke (grp);	296	dSP;
268	req_free (grp);	297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
269	}	304	}
270	}	305	}
271		306
272	static void poll_wait ()	307	static int req_invoke (eio_req *req)
273	{	308	{
274	fd_set rfd;	309	dSP;
275		310
276	while (nreqs)	311	if (req->flags & FLAG_SV2_RO_OFF)
		312	SvREADONLY_off (req->sv2);
		313
		314	if (!EIO_CANCELLED (req) && req->callback)
277	{	315	{
278	int size;
279	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
280	pthread_mutex_lock (&reslock);
281	#endif
282	size = res_queue.size;
283	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
284	pthread_mutex_unlock (&reslock);
285	#endif
286
287	if (size)
288	return;
289
290	FD_ZERO(&rfd);
291	FD_SET(respipe [0], &rfd);
292
293	select (respipe [0] + 1, &rfd, 0, 0, 0);
294	}
295	}
296
297	static void req_invoke (aio_req req)
298	{
299	dSP;
300
301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
302	{
303	errno = req->errorno;
304
305	ENTER;	316	ENTER;
306	SAVETMPS;	317	SAVETMPS;
307	PUSHMARK (SP);	318	PUSHMARK (SP);
308	EXTEND (SP, 1);	319	EXTEND (SP, 1);
309		320
310	switch (req->type)	321	switch (req->type)
311	{	322	{
312	case REQ_READDIR:	323	case EIO_READDIR:
313	{	324	{
314	SV *rv = &PL_sv_undef;	325	SV *rv = &PL_sv_undef;
315		326
316	if (req->result >= 0)	327	if (req->result >= 0)
317	{	328	{
		329	int i;
318	char *buf = req->data2ptr;	330	char *names = (char *)req->ptr2;
		331	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
319	AV *av = newAV ();	332	AV *av = newAV ();
320		333
321	while (req->result)	334	av_extend (av, req->result - 1);
		335
		336	for (i = 0; i < req->result; ++i)
322	{	337	{
		338	if (req->int1 & EIO_READDIR_DENTS)
		339	{
		340	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		341
		342	if (req->int1 & EIO_READDIR_CUSTOM2)
		343	{
		344	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		345	AV *avent = newAV ();
		346
		347	av_extend (avent, 2);
		348
		349	if (!sv_type [ent->type])
		350	{
		351	sv_type [ent->type] = newSViv (ent->type);
		352	SvREADONLY_on (sv_type [ent->type]);
		353	}
		354
		355	av_store (avent, 0, namesv);
		356	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		357	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		358
		359	av_store (av, i, newRV_noinc ((SV *)avent));
		360	}
		361	else
		362	av_store (av, i, namesv);
		363
		364	++ent;
		365	}
		366	else
		367	{
323	SV *sv = newSVpv (buf, 0);	368	SV *name = newSVpv (names, 0);
324
325	av_push (av, sv);	369	av_store (av, i, name);
326	buf += SvCUR (sv) + 1;	370	names += SvCUR (name) + 1;
327	req->result--;	371	}
328	}	372	}
329		373
330	rv = sv_2mortal (newRV_noinc ((SV *)av));	374	rv = sv_2mortal (newRV_noinc ((SV *)av));
331	}	375	}
332		376
333	PUSHs (rv);	377	PUSHs (rv);
		378
		379	if (req->int1 & EIO_READDIR_CUSTOM1)
		380	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
334	}	381	}
335	break;	382	break;
336		383
337	case REQ_OPEN:	384	case EIO_OPEN:
338	{	385	{
339	/* convert fd to fh */	386	/* convert fd to fh */
340	SV *fh;	387	SV *fh = &PL_sv_undef;
341		388
342	PUSHs (sv_2mortal (newSViv (req->result)));	389	if (req->result >= 0)
343	PUTBACK;	390	{
344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	391	GV *gv = (GV *)sv_newmortal ();
345	SPAGAIN;	392	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		393	char sym [64];
		394	int symlen;
		395
		396	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		397	gv_init (gv, aio_stash, sym, symlen, 0);
346		398
347	fh = SvREFCNT_inc (POPs);	399	symlen = snprintf (
		400	sym,
		401	sizeof (sym),
		402	"%s&=%d",
		403	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		404	(int)req->result
		405	);
348		406
		407	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		408	fh = (SV *)gv;
		409	}
		410
349	PUSHMARK (SP);	411	PUSHs (fh);
350	XPUSHs (sv_2mortal (fh));
351	}	412	}
352	break;	413	break;
353		414
		415	case EIO_STATVFS:
		416	case EIO_FSTATVFS:
		417	{
		418	SV *rv = &PL_sv_undef;
		419
		420	if (req->result >= 0)
		421	{
		422	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		423	HV *hv = newHV ();
		424
		425	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		426
		427	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		428	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		429	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		430	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		431	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		432	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		433	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		434	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		435	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		436	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		437	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		438	}
		439
		440	PUSHs (rv);
		441	}
		442
		443	break;
		444
354	case REQ_GROUP:	445	case EIO_GROUP:
355	req->fd = 2; /* mark group as finished */	446	req->int1 = 2; /* mark group as finished */
356		447
357	if (req->data)	448	if (req->sv1)
358	{	449	{
359	int i;	450	int i;
360	AV *av = (AV *)req->data;	451	AV *av = (AV *)req->sv1;
361		452
362	EXTEND (SP, AvFILL (av) + 1);	453	EXTEND (SP, AvFILL (av) + 1);
363	for (i = 0; i <= AvFILL (av); ++i)	454	for (i = 0; i <= AvFILL (av); ++i)
364	PUSHs (*av_fetch (av, i, 0));	455	PUSHs (*av_fetch (av, i, 0));
365	}	456	}
366	break;	457	break;
367		458
368	case REQ_NOP:	459	case EIO_NOP:
369	case REQ_BUSY:	460	case EIO_BUSY:
370	break;	461	break;
		462
		463	case EIO_READLINK:
		464	if (req->result > 0)
		465	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		466	break;
		467
		468	case EIO_STAT:
		469	case EIO_LSTAT:
		470	case EIO_FSTAT:
		471	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		472	PL_laststatval = req->result;
		473	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		474	PUSHs (sv_2mortal (newSViv (req->result)));
		475	break;
		476
		477	case EIO_READ:
		478	{
		479	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		480	*SvEND (req->sv2) = 0;
		481	SvPOK_only (req->sv2);
		482	SvSETMAGIC (req->sv2);
		483	PUSHs (sv_2mortal (newSViv (req->result)));
		484	}
		485	break;
		486
		487	case EIO_DUP2:
		488	if (req->result > 0)
		489	req->result = 0;
		490	/* FALLTHROUGH */
371		491
372	default:	492	default:
373	PUSHs (sv_2mortal (newSViv (req->result)));	493	PUSHs (sv_2mortal (newSViv (req->result)));
374	break;	494	break;
375	}	495	}
376		496
		497	errno = req->errorno;
377		498
378	PUTBACK;	499	PUTBACK;
379	call_sv (req->callback, G_VOID | G_EVAL);	500	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
380	SPAGAIN;	501	SPAGAIN;
381		502
382	FREETMPS;	503	FREETMPS;
383	LEAVE;	504	LEAVE;
		505
		506	PUTBACK;
384	}	507	}
385		508
386	if (req->grp)	509	return !!SvTRUE (ERRSV);
387	{
388	aio_req grp = req->grp;
389
390	/* unlink request */
391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
393
394	if (grp->grp_first == req)
395	grp->grp_first = req->grp_next;
396
397	aio_grp_dec (grp);
398	}
399
400	if (SvTRUE (ERRSV))
401	{
402	req_free (req);
403	croak (0);
404	}
405	}	510	}
406		511
407	static void req_free (aio_req req)	512	static void req_destroy (aio_req req)
408	{	513	{
409	if (req->self)	514	if (req->self)
410	{	515	{
411	sv_unmagic (req->self, PERL_MAGIC_ext);	516	sv_unmagic (req->self, PERL_MAGIC_ext);
412	SvREFCNT_dec (req->self);	517	SvREFCNT_dec (req->self);
413	}	518	}
414		519
415	SvREFCNT_dec (req->data);
416	SvREFCNT_dec (req->fh);	520	SvREFCNT_dec (req->sv1);
417	SvREFCNT_dec (req->fh2);	521	SvREFCNT_dec (req->sv2);
418	SvREFCNT_dec (req->callback);	522	SvREFCNT_dec (req->callback);
419	Safefree (req->statdata);
420
421	if (req->type == REQ_READDIR && req->result >= 0)
422	free (req->data2ptr);
423		523
424	Safefree (req);	524	Safefree (req);
425	}	525	}
426		526
427	static void req_cancel (aio_req req)	527	static void req_cancel_subs (aio_req grp)
428	{	528	{
429	req->flags |= FLAG_CANCELLED;	529	aio_req sub;
430		530
431	if (req->type == REQ_GROUP)	531	if (grp->type != EIO_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->sv2);
		535	grp->sv2 = 0;
		536
		537	eio_grp_cancel (grp);
		538	}
		539
		540	static void
		541	create_respipe (void)
		542	{
		543	if (s_epipe_renew (&respipe))
		544	croak ("IO::AIO: unable to initialize result pipe");
		545	}
		546
		547	static void poll_wait (void)
		548	{
		549	while (eio_nreqs ())
432	{	550	{
433	aio_req sub;	551	int size;
434		552
435	for (sub = req->grp_first; sub; sub = sub->grp_next)	553	X_LOCK (reslock);
436	req_cancel (sub);	554	size = res_queue.size;
		555	X_UNLOCK (reslock);
		556
		557	if (size)
		558	return;
		559
		560	etp_maybe_start_thread ();
		561
		562	s_epipe_wait (&respipe);
437	}	563	}
438	}	564	}
439		565
440	static int poll_cb ()	566	static int poll_cb (void)
441	{	567	{
442	dSP;
443	int count = 0;
444	int do_croak = 0;
445	aio_req req;
446
447	for (;;)	568	for (;;)
448	{	569	{
449	pthread_mutex_lock (&reslock);	570	int res = eio_poll ();
450	req = reqq_shift (&res_queue);
451		571
452	if (req)	572	if (res > 0)
453	{
454	if (!res_queue.size)
455	{
456	/* read any signals sent by the worker threads */
457	char buf [32];
458	while (read (respipe [0], buf, 32) == 32)
459	;
460	}
461	}
462
463	pthread_mutex_unlock (&reslock);
464
465	if (!req)
466	break;	573	croak (0);
467		574
468	--nreqs;	575	if (!max_outstanding || max_outstanding > eio_nreqs ())
		576	return res;
469		577
470	if (req->type == REQ_QUIT)	578	poll_wait ();
471	started--;
472	else if (req->type == REQ_GROUP && req->length)
473	{
474	req->fd = 1; /* mark request as delayed */
475	continue;
476	}
477	else
478	{
479	if (req->type == REQ_READ)
480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
481
482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
483	SvREADONLY_off (req->data);
484
485	if (req->statdata)
486	{
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;
489	PL_statcache = *(req->statdata);
490	}
491
492	req_invoke (req);
493
494	count++;
495	}
496
497	req_free (req);
498	}	579	}
499
500	return count;
501	}	580	}
502		581
503	static void *aio_proc(void *arg);
504
505	static void start_thread (void)	582	static void atfork_child (void)
506	{	583	{
507	sigset_t fullsigset, oldsigset;	584	create_respipe ();
508	pthread_t tid;
509	pthread_attr_t attr;
510
511	pthread_attr_init (&attr);
512	pthread_attr_setstacksize (&attr, STACKSIZE);
513	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
514
515	sigfillset (&fullsigset);
516	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
517
518	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
519	started++;
520
521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
522	}
523
524	static void req_send (aio_req req)
525	{
526	while (started < wanted && nreqs >= started)
527	start_thread ();
528
529	++nreqs;
530
531	pthread_mutex_lock (&reqlock);
532	reqq_push (&req_queue, req);
533	pthread_cond_signal (&reqwait);
534	pthread_mutex_unlock (&reqlock);
535
536	if (nreqs > max_outstanding)
537	for (;;)
538	{
539	poll_cb ();
540
541	if (nreqs <= max_outstanding)
542	break;
543
544	poll_wait ();
545	}
546	}
547
548	static void end_thread (void)
549	{
550	aio_req req;
551
552	Newz (0, req, 1, aio_cb);
553
554	req->type = REQ_QUIT;
555	req->pri = PRI_MAX + PRI_BIAS;
556
557	req_send (req);
558	}
559
560	static void min_parallel (int nthreads)
561	{
562	if (wanted < nthreads)
563	wanted = nthreads;
564	}
565
566	static void max_parallel (int nthreads)
567	{
568	int cur = started;
569
570	if (wanted > nthreads)
571	wanted = nthreads;
572
573	while (cur > wanted)
574	{
575	end_thread ();
576	cur--;
577	}
578
579	while (started > wanted)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584	}
585
586	static void create_pipe ()
587	{
588	if (pipe (respipe))
589	croak ("unable to initialize result pipe");
590
591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593
594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
595	croak ("cannot set result pipe to nonblocking mode");
596	}	585	}
597		586
598	/*****************************************************************************/	587	/*****************************************************************************/
599	/* work around various missing functions */
600		588
601	#if !HAVE_PREADWRITE	589	#if !_POSIX_MAPPED_FILES
602	# define pread aio_pread	590	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
603	# define pwrite aio_pwrite	591	# define munmap(addr,length) (errno = ENOSYS, -1)
604
605	/*
606	* make our pread/pwrite safe against themselves, but not against
607	* normal read/write by using a mutex. slows down execution a lot,
608	* but that's your problem, not mine.
609	*/
610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
611
612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
613	{
614	ssize_t res;
615	off_t ooffset;
616
617	pthread_mutex_lock (&preadwritelock);
618	ooffset = lseek (fd, 0, SEEK_CUR);
619	lseek (fd, offset, SEEK_SET);
620	res = read (fd, buf, count);
621	lseek (fd, ooffset, SEEK_SET);
622	pthread_mutex_unlock (&preadwritelock);
623
624	return res;
625	}
626
627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
628	{
629	ssize_t res;
630	off_t ooffset;
631
632	pthread_mutex_lock (&preadwritelock);
633	ooffset = lseek (fd, 0, SEEK_CUR);
634	lseek (fd, offset, SEEK_SET);
635	res = write (fd, buf, count);
636	lseek (fd, offset, SEEK_SET);
637	pthread_mutex_unlock (&preadwritelock);
638
639	return res;
640	}
641	#endif
642
643	#if !HAVE_FDATASYNC
644	# define fdatasync fsync
645	#endif
646
647	#if !HAVE_READAHEAD
648	# define readahead aio_readahead
649
650	static ssize_t readahead (int fd, off_t offset, size_t count)
651	{
652	dBUF;
653
654	while (count > 0)
655	{
656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
657
658	pread (fd, aio_buf, len, offset);
659	offset += len;
660	count -= len;
661	}
662
663	fBUF;
664
665	errno = 0;
666	}
667	#endif
668
669	#if !HAVE_READDIR_R
670	# define readdir_r aio_readdir_r
671
672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
673
674	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
675	{
676	struct dirent *e;
677	int errorno;
678
679	pthread_mutex_lock (&readdirlock);
680
681	e = readdir (dirp);
682	errorno = errno;
683
684	if (e)
685	{
686	*res = ent;
687	strcpy (ent->d_name, e->d_name);
688	}
689	else
690	*res = 0;
691
692	pthread_mutex_unlock (&readdirlock);
693
694	errno = errorno;
695	return e ? 0 : -1;
696	}
697	#endif
698
699	/* sendfile always needs emulation */
700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
701	{
702	ssize_t res;
703
704	if (!count)
705	return 0;
706
707	#if HAVE_SENDFILE
708	# if __linux
709	res = sendfile (ofd, ifd, &offset, count);
710
711	# elif __freebsd
712	/*
713	* Of course, the freebsd sendfile is a dire hack with no thoughts
714	* wasted on making it similar to other I/O functions.
715	*/
716	{
717	off_t sbytes;
718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
719
720	if (res < 0 && sbytes)
721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
722	res = sbytes;
723	}
724
725	# elif __hpux
726	res = sendfile (ofd, ifd, offset, count, 0, 0);
727
728	# elif __solaris
729	{
730	struct sendfilevec vec;
731	size_t sbytes;
732
733	vec.sfv_fd = ifd;
734	vec.sfv_flag = 0;
735	vec.sfv_off = offset;
736	vec.sfv_len = count;
737
738	res = sendfilev (ofd, &vec, 1, &sbytes);
739
740	if (res < 0 && sbytes)
741	res = sbytes;
742	}
743
744	# endif	592	#endif
745	#else
746	res = -1;
747	errno = ENOSYS;
748	#endif
749		593
750	if (res < 0	594	#define MMAP_MAGIC PERL_MAGIC_ext
751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
752	#if __solaris
753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
754	#endif
755	)
756	)
757	{
758	/* emulate sendfile. this is a major pain in the ass */
759	dBUF;
760		595
761	res = 0;	596	static int
762		597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
763	while (count)
764	{
765	ssize_t cnt;
766
767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
768
769	if (cnt <= 0)
770	{
771	if (cnt && !res) res = -1;
772	break;
773	}
774
775	cnt = write (ofd, aio_buf, cnt);
776
777	if (cnt <= 0)
778	{
779	if (cnt && !res) res = -1;
780	break;
781	}
782
783	offset += cnt;
784	res += cnt;
785	count -= cnt;
786	}
787
788	fBUF;
789	}
790
791	return res;
792	}
793
794	/* read a full directory */
795	static int scandir_ (const char *path, void **namesp)
796	{	598	{
797	DIR *dirp;	599	int old_errno = errno;
798	union	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
799	{
800	struct dirent d;
801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
802	} *u;
803	struct dirent *entp;
804	char *name, *names;
805	int memlen = 4096;
806	int memofs = 0;
807	int res = 0;
808	int errorno;
809
810	dirp = opendir (path);
811	if (!dirp)
812	return -1;
813
814	u = malloc (sizeof (*u));
815	names = malloc (memlen);
816
817	if (u && names)
818	for (;;)
819	{
820	errno = 0;
821	readdir_r (dirp, &u->d, &entp);
822
823	if (!entp)
824	break;
825
826	name = entp->d_name;
827
828	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
829	{
830	int len = strlen (name) + 1;
831
832	res++;
833
834	while (memofs + len > memlen)
835	{
836	memlen *= 2;
837	names = realloc (names, memlen);
838	if (!names)
839	break;
840	}
841
842	memcpy (names + memofs, name, len);
843	memofs += len;
844	}
845	}
846
847	errorno = errno;	601	errno = old_errno;
848	free (u);
849	closedir (dirp);
850		602
851	if (errorno)	603	mg->mg_obj = 0; /* just in case */
852	{
853	free (names);
854	errno = errorno;
855	res = -1;
856	}
857		604
858	*namesp = (void *)names;	605	SvREADONLY_off (sv);
		606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
		610
859	return res;	611	return 0;
860	}	612	}
		613
		614	static MGVTBL mmap_vtbl = {
		615	0, 0, 0, 0, mmap_free
		616	};
861		617
862	/*****************************************************************************/	618	/*****************************************************************************/
863		619
864	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
865	{	622	{
866	aio_req req;	623	SvGETMAGIC (cb_sv);
867	int type;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
868
869	do
870	{
871	pthread_mutex_lock (&reqlock);
872
873	for (;;)
874	{
875	req = reqq_shift (&req_queue);
876
877	if (req)
878	break;
879
880	pthread_cond_wait (&reqwait, &reqlock);
881	}
882
883	pthread_mutex_unlock (&reqlock);
884
885	errno = 0; /* strictly unnecessary */
886	type = req->type; /* remember type for QUIT check */
887
888	if (!(req->flags & FLAG_CANCELLED))
889	switch (type)
890	{
891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
893
894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
896
897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
900
901	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
902	case REQ_CLOSE: req->result = close (req->fd); break;
903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
904	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
905	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
906	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
908
909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
910	case REQ_FSYNC: req->result = fsync (req->fd); break;
911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
912
913	case REQ_BUSY:
914	{
915	struct timeval tv;
916
917	tv.tv_sec = req->fd;
918	tv.tv_usec = req->fd2;
919
920	req->result = select (0, 0, 0, 0, &tv);
921	}
922
923	case REQ_GROUP:
924	case REQ_NOP:
925	case REQ_QUIT:
926	break;
927
928	default:
929	req->result = ENOSYS;
930	break;
931	}
932
933	req->errorno = errno;
934
935	pthread_mutex_lock (&reslock);
936
937	if (!reqq_push (&res_queue, req))
938	/* write a dummy byte to the pipe so fh becomes ready */
939	write (respipe [1], &respipe, 1);
940
941	pthread_mutex_unlock (&reslock);
942	}
943	while (type != REQ_QUIT);
944
945	return 0;
946	}
947
948	/*****************************************************************************/
949
950	static void atfork_prepare (void)
951	{
952	pthread_mutex_lock (&reqlock);
953	pthread_mutex_lock (&reslock);
954	#if !HAVE_PREADWRITE
955	pthread_mutex_lock (&preadwritelock);
956	#endif
957	#if !HAVE_READDIR_R
958	pthread_mutex_lock (&readdirlock);
959	#endif
960	}
961
962	static void atfork_parent (void)
963	{
964	#if !HAVE_READDIR_R
965	pthread_mutex_unlock (&readdirlock);
966	#endif
967	#if !HAVE_PREADWRITE
968	pthread_mutex_unlock (&preadwritelock);
969	#endif
970	pthread_mutex_unlock (&reslock);
971	pthread_mutex_unlock (&reqlock);
972	}
973
974	static void atfork_child (void)
975	{
976	aio_req prv;
977
978	started = 0;
979
980	while (prv = reqq_shift (&req_queue))
981	req_free (prv);
982
983	while (prv = reqq_shift (&res_queue))
984	req_free (prv);
985
986	close (respipe [0]);
987	close (respipe [1]);
988	create_pipe ();
989
990	atfork_parent ();
991	}	625	}
992		626
993	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
994	aio_req req; \	629	aio_req req; \
995	int req_pri = next_pri; \	630	int req_pri = next_pri; \
996	next_pri = DEFAULT_PRI + PRI_BIAS; \	631	next_pri = EIO_PRI_DEFAULT; \
997	\	632	\
998	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
999	croak ("callback must be undef or of reference type"); \
1000	\	634	\
1001	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
1002	if (!req) \	636	if (!req) \
1003	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
1004	\	638	\
1005	req->callback = newSVsv (callback); \	639	req->callback = SvREFCNT_inc (cb_cv); \
1006	req->pri = req_pri	640	req->pri = req_pri
1007		641
1008	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
1009	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
1010	\	646	\
1011	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
1013		649
1014	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
1015		651
1016	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
1017		653
1018	BOOT:	654	BOOT:
1019	{	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_RDWR)
		668	const_iv (O_CREAT)
		669	const_iv (O_TRUNC)
		670	const_iv (O_EXCL)
		671	const_iv (O_APPEND)
		672	#ifndef _WIN32
		673	const_iv (S_IFIFO)
		674	#endif
		675	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		676	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		677	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		678	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		679	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		680	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		681
		682	const_iv (ST_RDONLY)
		683	const_iv (ST_NOSUID)
		684	const_iv (ST_NODEV)
		685	const_iv (ST_NOEXEC)
		686	const_iv (ST_SYNCHRONOUS)
		687	const_iv (ST_MANDLOCK)
		688	const_iv (ST_WRITE)
		689	const_iv (ST_APPEND)
		690	const_iv (ST_IMMUTABLE)
		691	const_iv (ST_NOATIME)
		692	const_iv (ST_NODIRATIME)
		693	const_iv (ST_RELATIME)
		694
		695	const_iv (PROT_EXEC)
		696	const_iv (PROT_NONE)
		697	const_iv (PROT_READ)
		698	const_iv (PROT_WRITE)
		699
		700	/*const_iv (MAP_FIXED)*/
		701	const_iv (MAP_PRIVATE)
		702	const_iv (MAP_SHARED)
		703	const_iv (MAP_ANONYMOUS)
		704
		705	/* linuxish */
		706	const_iv (MAP_HUGETLB)
		707	const_iv (MAP_LOCKED)
		708	const_iv (MAP_NORESERVE)
		709	const_iv (MAP_POPULATE)
		710	const_iv (MAP_NONBLOCK)
		711
		712	const_iv (MCL_FUTURE)
		713	const_iv (MCL_CURRENT)
		714
		715	const_eio (MS_ASYNC)
		716	const_eio (MS_INVALIDATE)
		717	const_eio (MS_SYNC)
		718
		719	const_eio (MT_MODIFY)
		720
		721	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		722	const_eio (SYNC_FILE_RANGE_WRITE)
		723	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		724
		725	const_eio (READDIR_DENTS)
		726	const_eio (READDIR_DIRS_FIRST)
		727	const_eio (READDIR_STAT_ORDER)
		728	const_eio (READDIR_FOUND_UNKNOWN)
		729
		730	const_eio (DT_UNKNOWN)
		731	const_eio (DT_FIFO)
		732	const_eio (DT_CHR)
		733	const_eio (DT_DIR)
		734	const_eio (DT_BLK)
		735	const_eio (DT_REG)
		736	const_eio (DT_LNK)
		737	const_eio (DT_SOCK)
		738	const_eio (DT_WHT)
		739	};
		740
1020	HV *stash = gv_stashpv ("IO::AIO", 1);	741	aio_stash = gv_stashpv ("IO::AIO" , 1);
1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	742	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	743	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1024		744
		745	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		746	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		747
		748	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		749
1025	create_pipe ();	750	create_respipe ();
1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1027	}
1028		751
		752	if (eio_init (want_poll, done_poll) < 0)
		753	croak ("IO::AIO: unable to initialise eio library");
		754
		755	/* atfork child called in fifo order, so before eio's handler */
		756	X_THREAD_ATFORK (0, 0, atfork_child);
		757	}
		758
1029	void	759	void
1030	min_parallel (nthreads)	760	max_poll_reqs (int nreqs)
1031	int nthreads
1032	PROTOTYPE: $	761	PROTOTYPE: $
		762	CODE:
		763	eio_set_max_poll_reqs (nreqs);
1033		764
1034	void	765	void
1035	max_parallel (nthreads)	766	max_poll_time (double nseconds)
1036	int nthreads
1037	PROTOTYPE: $	767	PROTOTYPE: $
1038
1039	int
1040	max_outstanding (nreqs)
1041	int nreqs
1042	PROTOTYPE: $
1043	CODE:	768	CODE:
1044	RETVAL = max_outstanding;	769	eio_set_max_poll_time (nseconds);
		770
		771	void
		772	min_parallel (int nthreads)
		773	PROTOTYPE: $
		774	CODE:
		775	eio_set_min_parallel (nthreads);
		776
		777	void
		778	max_parallel (int nthreads)
		779	PROTOTYPE: $
		780	CODE:
		781	eio_set_max_parallel (nthreads);
		782
		783	void
		784	max_idle (int nthreads)
		785	PROTOTYPE: $
		786	CODE:
		787	eio_set_max_idle (nthreads);
		788
		789	void
		790	max_outstanding (int maxreqs)
		791	PROTOTYPE: $
		792	CODE:
1045	max_outstanding = nreqs;	793	max_outstanding = maxreqs;
1046		794
1047	void	795	void
1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	796	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1049	SV * pathname
1050	int flags
1051	int mode
1052	SV * callback
1053	PROTOTYPE: $$$;$	797	PROTOTYPE: $$$;$
1054	PPCODE:	798	PPCODE:
1055	{	799	{
1056	dREQ;	800	dREQ;
1057		801
1058	req->type = REQ_OPEN;	802	req->type = EIO_OPEN;
1059	req->data = newSVsv (pathname);	803	req->sv1 = newSVsv (pathname);
1060	req->dataptr = SvPVbyte_nolen (req->data);	804	req->ptr1 = SvPVbyte_nolen (req->sv1);
1061	req->fd = flags;	805	req->int1 = flags;
1062	req->mode = mode;	806	req->int2 = mode;
1063		807
1064	REQ_SEND;	808	REQ_SEND;
1065	}	809	}
1066		810
1067	void	811	void
1068	aio_close (fh,callback=&PL_sv_undef)	812	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1069	SV * fh
1070	SV * callback
1071	PROTOTYPE: $;$	813	PROTOTYPE: $;$
1072	ALIAS:	814	ALIAS:
1073	aio_close = REQ_CLOSE
1074	aio_fsync = REQ_FSYNC	815	aio_fsync = EIO_FSYNC
1075	aio_fdatasync = REQ_FDATASYNC	816	aio_fdatasync = EIO_FDATASYNC
1076	PPCODE:	817	PPCODE:
1077	{	818	{
		819	int fd = s_fileno_croak (fh, 0);
1078	dREQ;	820	dREQ;
1079		821
1080	req->type = ix;	822	req->type = ix;
1081	req->fh = newSVsv (fh);	823	req->sv1 = newSVsv (fh);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	824	req->int1 = fd;
1083		825
1084	REQ_SEND (req);	826	REQ_SEND (req);
1085	}	827	}
1086		828
1087	void	829	void
		830	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		831	PROTOTYPE: $$$$;$
		832	PPCODE:
		833	{
		834	int fd = s_fileno_croak (fh, 0);
		835	dREQ;
		836
		837	req->type = EIO_SYNC_FILE_RANGE;
		838	req->sv1 = newSVsv (fh);
		839	req->int1 = fd;
		840	req->offs = offset;
		841	req->size = nbytes;
		842	req->int2 = flags;
		843
		844	REQ_SEND (req);
		845	}
		846
		847	void
		848	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $;$
		850	PPCODE:
		851	{
		852	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	if (close_pipe < 0)
		857	{
		858	int pipefd [2];
		859
		860	if (pipe (pipefd) < 0
		861	|| close (pipefd [1]) < 0
		862	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		863	abort (); /*D*/
		864
		865	close_pipe = pipefd [0];
		866	}
		867
		868	req->type = EIO_DUP2;
		869	req->int1 = close_pipe;
		870	req->sv2 = newSVsv (fh);
		871	req->int2 = fd;
		872
		873	REQ_SEND (req);
		874	}
		875
		876	void
1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	877	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1089	SV * fh
1090	UV offset
1091	UV length
1092	SV * data
1093	UV dataoffset
1094	SV * callback
1095	ALIAS:	878	ALIAS:
1096	aio_read = REQ_READ	879	aio_read = EIO_READ
1097	aio_write = REQ_WRITE	880	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$	881	PROTOTYPE: $$$$$;$
1099	PPCODE:	882	PPCODE:
1100	{	883	{
1101	aio_req req;
1102	STRLEN svlen;	884	STRLEN svlen;
		885	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1103	char *svptr = SvPVbyte (data, svlen);	886	char *svptr = SvPVbyte (data, svlen);
1104		887	UV len = SvUV (length);
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107		888
1108	if (dataoffset < 0)	889	if (dataoffset < 0)
1109	dataoffset += svlen;	890	dataoffset += svlen;
1110		891
1111	if (dataoffset < 0 || dataoffset > svlen)	892	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("data offset outside of string");	893	croak ("dataoffset outside of data scalar");
1113		894
1114	if (ix == REQ_WRITE)	895	if (ix == EIO_WRITE)
1115	{	896	{
1116	/* write: check length and adjust. */	897	/* write: check length and adjust. */
1117	if (length < 0 || length + dataoffset > svlen)	898	if (!SvOK (length) || len + dataoffset > svlen)
1118	length = svlen - dataoffset;	899	len = svlen - dataoffset;
1119	}	900	}
1120	else	901	else
1121	{	902	{
1122	/* read: grow scalar as necessary */	903	/* read: check type and grow scalar as necessary */
		904	SvUPGRADE (data, SVt_PV);
1123	svptr = SvGROW (data, length + dataoffset);	905	svptr = SvGROW (data, len + dataoffset + 1);
1124	}	906	}
1125
1126	if (length < 0)
1127	croak ("length must not be negative");
1128		907
1129	{	908	{
1130	dREQ;	909	dREQ;
1131		910
1132	req->type = ix;	911	req->type = ix;
1133	req->fh = newSVsv (fh);	912	req->sv1 = newSVsv (fh);
1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	913	req->int1 = fd;
1135	: IoOFP (sv_2io (fh)));	914	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1136	req->offset = offset;	915	req->size = len;
1137	req->length = length;
1138	req->data = SvREFCNT_inc (data);	916	req->sv2 = SvREFCNT_inc (data);
1139	req->dataptr = (char *)svptr + dataoffset;	917	req->ptr2 = (char *)svptr + dataoffset;
		918	req->stroffset = dataoffset;
1140		919
1141	if (!SvREADONLY (data))	920	if (!SvREADONLY (data))
1142	{	921	{
1143	SvREADONLY_on (data);	922	SvREADONLY_on (data);
1144	req->data2ptr = (void *)data;	923	req->flags |= FLAG_SV2_RO_OFF;
1145	}	924	}
1146		925
1147	REQ_SEND;	926	REQ_SEND;
1148	}	927	}
1149	}	928	}
1150		929
1151	void	930	void
		931	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		932	PROTOTYPE: $$;$
		933	PPCODE:
		934	{
		935	SV *data;
		936	dREQ;
		937
		938	req->type = EIO_READLINK;
		939	req->sv1 = newSVsv (path);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941
		942	REQ_SEND;
		943	}
		944
		945	void
1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	946	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1153	SV * out_fh
1154	SV * in_fh
1155	UV in_offset
1156	UV length
1157	SV * callback
1158	PROTOTYPE: $$$$;$	947	PROTOTYPE: $$$$;$
1159	PPCODE:	948	PPCODE:
1160	{	949	{
		950	int ifd = s_fileno_croak (in_fh , 0);
		951	int ofd = s_fileno_croak (out_fh, 1);
1161	dREQ;	952	dREQ;
1162		953
1163	req->type = REQ_SENDFILE;	954	req->type = EIO_SENDFILE;
1164	req->fh = newSVsv (out_fh);	955	req->sv1 = newSVsv (out_fh);
1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	956	req->int1 = ofd;
1166	req->fh2 = newSVsv (in_fh);	957	req->sv2 = newSVsv (in_fh);
1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	958	req->int2 = ifd;
1168	req->offset = in_offset;	959	req->offs = in_offset;
1169	req->length = length;	960	req->size = length;
1170		961
1171	REQ_SEND;	962	REQ_SEND;
1172	}	963	}
1173		964
1174	void	965	void
1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	966	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	IV length
1179	SV * callback
1180	PROTOTYPE: $$$;$	967	PROTOTYPE: $$$;$
1181	PPCODE:	968	PPCODE:
1182	{	969	{
		970	int fd = s_fileno_croak (fh, 0);
1183	dREQ;	971	dREQ;
1184		972
1185	req->type = REQ_READAHEAD;	973	req->type = EIO_READAHEAD;
1186	req->fh = newSVsv (fh);	974	req->sv1 = newSVsv (fh);
1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	975	req->int1 = fd;
1188	req->offset = offset;	976	req->offs = offset;
1189	req->length = length;	977	req->size = length;
1190		978
1191	REQ_SEND;	979	REQ_SEND;
1192	}	980	}
1193		981
1194	void	982	void
1195	aio_stat (fh_or_path,callback=&PL_sv_undef)	983	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1196	SV * fh_or_path
1197	SV * callback
1198	ALIAS:	984	ALIAS:
1199	aio_stat = REQ_STAT	985	aio_stat = EIO_STAT
1200	aio_lstat = REQ_LSTAT	986	aio_lstat = EIO_LSTAT
		987	aio_statvfs = EIO_STATVFS
1201	PPCODE:	988	PPCODE:
1202	{	989	{
1203	dREQ;	990	dREQ;
1204		991
1205	New (0, req->statdata, 1, Stat_t);	992	req->sv1 = newSVsv (fh_or_path);
1206	if (!req->statdata)
1207	{
1208	req_free (req);
1209	croak ("out of memory during aio_req->statdata allocation");
1210	}
1211		993
1212	if (SvPOK (fh_or_path))	994	if (SvPOK (req->sv1))
1213	{	995	{
1214	req->type = ix;	996	req->type = ix;
1215	req->data = newSVsv (fh_or_path);
1216	req->dataptr = SvPVbyte_nolen (req->data);	997	req->ptr1 = SvPVbyte_nolen (req->sv1);
1217	}	998	}
1218	else	999	else
1219	{	1000	{
1220	req->type = REQ_FSTAT;	1001	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1221	req->fh = newSVsv (fh_or_path);
1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1002	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1223	}	1003	}
1224		1004
1225	REQ_SEND;	1005	REQ_SEND;
1226	}	1006	}
1227		1007
1228	void	1008	void
		1009	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1010	PPCODE:
		1011	{
		1012	dREQ;
		1013
		1014	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1015	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1016	req->sv1 = newSVsv (fh_or_path);
		1017
		1018	if (SvPOK (req->sv1))
		1019	{
		1020	req->type = EIO_UTIME;
		1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1022	}
		1023	else
		1024	{
		1025	req->type = EIO_FUTIME;
		1026	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1027	}
		1028
		1029	REQ_SEND;
		1030	}
		1031
		1032	void
		1033	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1034	PPCODE:
		1035	{
		1036	dREQ;
		1037
		1038	req->sv1 = newSVsv (fh_or_path);
		1039	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1040
		1041	if (SvPOK (req->sv1))
		1042	{
		1043	req->type = EIO_TRUNCATE;
		1044	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1045	}
		1046	else
		1047	{
		1048	req->type = EIO_FTRUNCATE;
		1049	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1050	}
		1051
		1052	REQ_SEND;
		1053	}
		1054
		1055	void
		1056	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1057	ALIAS:
		1058	aio_chmod = EIO_CHMOD
		1059	aio_mkdir = EIO_MKDIR
		1060	PPCODE:
		1061	{
		1062	dREQ;
		1063
		1064	req->int2 = mode;
		1065	req->sv1 = newSVsv (fh_or_path);
		1066
		1067	if (SvPOK (req->sv1))
		1068	{
		1069	req->type = ix;
		1070	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1071	}
		1072	else
		1073	{
		1074	req->type = EIO_FCHMOD;
		1075	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1076	}
		1077
		1078	REQ_SEND;
		1079	}
		1080
		1081	void
		1082	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1083	PPCODE:
		1084	{
		1085	dREQ;
		1086
		1087	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1088	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1089	req->sv1 = newSVsv (fh_or_path);
		1090
		1091	if (SvPOK (req->sv1))
		1092	{
		1093	req->type = EIO_CHOWN;
		1094	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1095	}
		1096	else
		1097	{
		1098	req->type = EIO_FCHOWN;
		1099	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1100	}
		1101
		1102	REQ_SEND;
		1103	}
		1104
		1105	void
		1106	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1107	PPCODE:
		1108	{
		1109	dREQ;
		1110
		1111	req->type = EIO_READDIR;
		1112	req->sv1 = newSVsv (pathname);
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1115
		1116	if (flags & EIO_READDIR_DENTS)
		1117	req->int1 |= EIO_READDIR_CUSTOM2;
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
1229	aio_unlink (pathname,callback=&PL_sv_undef)	1123	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1230	SV * pathname
1231	SV * callback
1232	ALIAS:	1124	ALIAS:
1233	aio_unlink = REQ_UNLINK	1125	aio_unlink = EIO_UNLINK
1234	aio_rmdir = REQ_RMDIR	1126	aio_rmdir = EIO_RMDIR
1235	aio_readdir = REQ_READDIR	1127	aio_readdir = EIO_READDIR
1236	PPCODE:	1128	PPCODE:
1237	{	1129	{
1238	dREQ;	1130	dREQ;
1239		1131
1240	req->type = ix;	1132	req->type = ix;
1241	req->data = newSVsv (pathname);	1133	req->sv1 = newSVsv (pathname);
1242	req->dataptr = SvPVbyte_nolen (req->data);	1134	req->ptr1 = SvPVbyte_nolen (req->sv1);
1243		1135
1244	REQ_SEND;	1136	REQ_SEND;
1245	}	1137	}
1246		1138
1247	void	1139	void
1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1140	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1249	SV * oldpath
1250	SV * newpath
1251	SV * callback
1252	ALIAS:	1141	ALIAS:
1253	aio_link = REQ_LINK	1142	aio_link = EIO_LINK
1254	aio_symlink = REQ_SYMLINK	1143	aio_symlink = EIO_SYMLINK
1255	aio_rename = REQ_RENAME	1144	aio_rename = EIO_RENAME
1256	PPCODE:	1145	PPCODE:
1257	{	1146	{
1258	dREQ;	1147	dREQ;
1259		1148
1260	req->type = ix;	1149	req->type = ix;
1261	req->fh = newSVsv (oldpath);	1150	req->sv1 = newSVsv (oldpath);
1262	req->data2ptr = SvPVbyte_nolen (req->fh);	1151	req->ptr1 = SvPVbyte_nolen (req->sv1);
1263	req->data = newSVsv (newpath);	1152	req->sv2 = newSVsv (newpath);
1264	req->dataptr = SvPVbyte_nolen (req->data);	1153	req->ptr2 = SvPVbyte_nolen (req->sv2);
1265		1154
1266	REQ_SEND;	1155	REQ_SEND;
1267	}	1156	}
1268		1157
1269	void	1158	void
1270	aio_busy (delay,callback=&PL_sv_undef)	1159	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1271	double delay
1272	SV * callback
1273	PPCODE:	1160	PPCODE:
1274	{	1161	{
1275	dREQ;	1162	dREQ;
1276		1163
1277	req->type = REQ_BUSY;	1164	req->type = EIO_MKNOD;
1278	req->fd = delay < 0. ? 0 : delay;	1165	req->sv1 = newSVsv (pathname);
1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280		1167	req->int2 = (mode_t)mode;
		1168	req->offs = dev;
		1169
1281	REQ_SEND;	1170	REQ_SEND;
1282	}	1171	}
1283		1172
1284	void	1173	void
		1174	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1175	ALIAS:
		1176	aio_mtouch = EIO_MTOUCH
		1177	aio_msync = EIO_MSYNC
		1178	PROTOTYPE: $$$$;$
		1179	PPCODE:
		1180	{
		1181	STRLEN svlen;
		1182	UV len = SvUV (length);
		1183	char *svptr = SvPVbyte (data, svlen);
		1184
		1185	if (offset < 0)
		1186	offset += svlen;
		1187
		1188	if (offset < 0 || offset > svlen)
		1189	croak ("offset outside of scalar");
		1190
		1191	if (!SvOK (length) || len + offset > svlen)
		1192	len = svlen - offset;
		1193
		1194	{
		1195	dREQ;
		1196
		1197	req->type = ix;
		1198	req->size = len;
		1199	req->sv2 = SvREFCNT_inc (data);
		1200	req->ptr2 = (char *)svptr + offset;
		1201	req->int1 = flags;
		1202
		1203	REQ_SEND;
		1204	}
		1205	}
		1206
		1207	void
		1208	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1209	PPCODE:
		1210	{
		1211	dREQ;
		1212
		1213	req->type = EIO_BUSY;
		1214	req->nv1 = delay < 0. ? 0. : delay;
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
1285	aio_group (callback=&PL_sv_undef)	1220	aio_group (SV *callback=&PL_sv_undef)
1286	SV * callback
1287	PROTOTYPE: ;$	1221	PROTOTYPE: ;$
1288	PPCODE:	1222	PPCODE:
1289	{	1223	{
1290	dREQ;	1224	dREQ;
1291		1225
1292	req->type = REQ_GROUP;	1226	req->type = EIO_GROUP;
		1227
1293	req_send (req);	1228	req_submit (req);
1294
1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1229	XPUSHs (req_sv (req, aio_grp_stash));
1296	}	1230	}
1297		1231
1298	void	1232	void
1299	aio_nop (callback=&PL_sv_undef)	1233	aio_nop (SV *callback=&PL_sv_undef)
1300	SV * callback	1234	ALIAS:
		1235	aio_nop = EIO_NOP
		1236	aio_sync = EIO_SYNC
1301	PPCODE:	1237	PPCODE:
1302	{	1238	{
1303	dREQ;	1239	dREQ;
1304		1240
1305	req->type = REQ_NOP;	1241	req->type = ix;
1306		1242
1307	REQ_SEND;	1243	REQ_SEND;
1308	}	1244	}
1309		1245
1310	void	1246	int
1311	aioreq_pri (int pri = DEFAULT_PRI)	1247	aioreq_pri (int pri = 0)
1312	CODE:	1248	PROTOTYPE: ;$
		1249	CODE:
		1250	RETVAL = next_pri;
		1251	if (items > 0)
		1252	{
1313	if (pri < PRI_MIN) pri = PRI_MIN;	1253	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1314	if (pri > PRI_MAX) pri = PRI_MAX;	1254	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1315	next_pri = pri + PRI_BIAS;	1255	next_pri = pri;
		1256	}
		1257	OUTPUT:
		1258	RETVAL
1316		1259
1317	void	1260	void
1318	aioreq_nice (int nice = 0)	1261	aioreq_nice (int nice = 0)
1319	CODE:	1262	CODE:
1320	nice = next_pri - nice;	1263	nice = next_pri - nice;
1321	if (nice < PRI_MIN) nice = PRI_MIN;	1264	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1322	if (nice > PRI_MAX) nice = PRI_MAX;	1265	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1323	next_pri = nice + PRI_BIAS;	1266	next_pri = nice;
1324		1267
1325	void	1268	void
1326	flush ()	1269	flush ()
1327	PROTOTYPE:	1270	PROTOTYPE:
1328	CODE:	1271	CODE:
1329	while (nreqs)	1272	while (eio_nreqs ())
1330	{	1273	{
1331	poll_wait ();	1274	poll_wait ();
1332	poll_cb ();	1275	poll_cb ();
1333	}	1276	}
1334		1277
1335	void	1278	int
1336	poll()	1279	poll()
1337	PROTOTYPE:	1280	PROTOTYPE:
1338	CODE:	1281	CODE:
1339	if (nreqs)
1340	{
1341	poll_wait ();	1282	poll_wait ();
1342	poll_cb ();	1283	RETVAL = poll_cb ();
1343	}	1284	OUTPUT:
		1285	RETVAL
1344		1286
1345	int	1287	int
1346	poll_fileno()	1288	poll_fileno()
1347	PROTOTYPE:	1289	PROTOTYPE:
1348	CODE:	1290	CODE:
1349	RETVAL = respipe [0];	1291	RETVAL = s_epipe_fd (&respipe);
1350	OUTPUT:	1292	OUTPUT:
1351	RETVAL	1293	RETVAL
1352		1294
1353	int	1295	int
1354	poll_cb(...)	1296	poll_cb(...)
…		…
1360		1302
1361	void	1303	void
1362	poll_wait()	1304	poll_wait()
1363	PROTOTYPE:	1305	PROTOTYPE:
1364	CODE:	1306	CODE:
1365	if (nreqs)
1366	poll_wait ();	1307	poll_wait ();
1367		1308
1368	int	1309	int
1369	nreqs()	1310	nreqs()
1370	PROTOTYPE:	1311	PROTOTYPE:
1371	CODE:	1312	CODE:
1372	RETVAL = nreqs;	1313	RETVAL = eio_nreqs ();
1373	OUTPUT:	1314	OUTPUT:
1374	RETVAL	1315	RETVAL
1375		1316
		1317	int
		1318	nready()
		1319	PROTOTYPE:
		1320	CODE:
		1321	RETVAL = eio_nready ();
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
		1326	npending()
		1327	PROTOTYPE:
		1328	CODE:
		1329	RETVAL = eio_npending ();
		1330	OUTPUT:
		1331	RETVAL
		1332
		1333	int
		1334	nthreads()
		1335	PROTOTYPE:
		1336	CODE:
		1337	RETVAL = eio_nthreads ();
		1338	OUTPUT:
		1339	RETVAL
		1340
		1341	int
		1342	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1343	PROTOTYPE: $$$$
		1344	CODE:
		1345	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1346	RETVAL = posix_fadvise (fh, offset, length, advice);
		1347	#else
		1348	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1349	#endif
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	ssize_t
		1354	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1355	PROTOTYPE: $$$$
		1356	CODE:
		1357	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	void
		1362	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1363	PROTOTYPE: $$$$$;$
		1364	PPCODE:
		1365	sv_unmagic (scalar, MMAP_MAGIC);
		1366	{
		1367	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1368	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1369	if (addr == (void *)-1)
		1370	XSRETURN_NO;
		1371
		1372	/* we store the length in mg_obj, as namlen is I32 :/ */
		1373	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1374	->mg_obj = (SV *)length;
		1375
		1376	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1377	if (!(prot & PROT_WRITE))
		1378	SvREADONLY_on (scalar);
		1379
		1380	SvPVX (scalar) = (char *)addr;
		1381	SvCUR_set (scalar, length);
		1382	SvLEN_set (scalar, 0);
		1383	SvPOK_only (scalar);
		1384
		1385	XSRETURN_YES;
		1386	}
		1387
		1388	void
		1389	munmap (SV *scalar)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	sv_unmagic (scalar, MMAP_MAGIC);
		1393
		1394	int
		1395	mlockall (int flags)
		1396	PROTOTYPE: $
		1397	CODE:
		1398	#if _POSIX_MEMLOCK
		1399	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1400	extern int mallopt (int, int);
		1401	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1402	#endif
		1403	mlockall (flags);
		1404	#else
		1405	RETVAL = -1;
		1406	errno = ENOSYS;
		1407	#endif
		1408	OUTPUT:
		1409	RETVAL
		1410
		1411	int
		1412	munlockall ()
		1413	PROTOTYPE:
		1414	CODE:
		1415	#if _POSIX_MEMLOCK
		1416	munlockall ();
		1417	#else
		1418	RETVAL = -1;
		1419	errno = ENOSYS;
		1420	#endif
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void _on_next_submit (SV *cb)
		1425	CODE:
		1426	SvREFCNT_dec (on_next_submit);
		1427	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1428
1376	PROTOTYPES: DISABLE	1429	PROTOTYPES: DISABLE
1377		1430
1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1431	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1379		1432
1380	void	1433	void
1381	cancel (aio_req_ornot req)	1434	cancel (aio_req_ornot req)
1382	CODE:	1435	CODE:
1383	req_cancel (req);	1436	eio_cancel (req);
1384		1437
1385	void	1438	void
1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1439	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1387	CODE:	1440	PPCODE:
		1441	{
		1442	if (GIMME_V != G_VOID)
		1443	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1444
		1445	if (items > 1)
		1446	{
		1447	SV *cb_cv =get_cb (callback);
		1448
1388	SvREFCNT_dec (req->callback);	1449	SvREFCNT_dec (req->callback);
1389	req->callback = newSVsv (callback);	1450	req->callback = SvREFCNT_inc (cb_cv);
		1451	}
		1452	}
1390		1453
1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1392		1455
1393	void	1456	void
1394	add (aio_req grp, ...)	1457	add (aio_req grp, ...)
1395	PPCODE:	1458	PPCODE:
1396	{	1459	{
1397	int i;	1460	int i;
1398	aio_req req;
1399		1461
1400	if (grp->fd == 2)	1462	if (grp->int1 == 2)
1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1463	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1402		1464
1403	for (i = 1; i < items; ++i )	1465	for (i = 1; i < items; ++i )
1404	{	1466	{
		1467	aio_req req;
		1468
1405	if (GIMME_V != G_VOID)	1469	if (GIMME_V != G_VOID)
1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1470	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1407		1471
1408	req = SvAIO_REQ (ST (i));	1472	req = SvAIO_REQ (ST (i));
1409		1473
1410	if (req)	1474	if (req)
1411	{	1475	eio_grp_add (grp, req);
1412	++grp->length;
1413	req->grp = grp;
1414
1415	req->grp_prev = 0;
1416	req->grp_next = grp->grp_first;
1417
1418	if (grp->grp_first)
1419	grp->grp_first->grp_prev = req;
1420
1421	grp->grp_first = req;
1422	}
1423	}	1476	}
1424	}	1477	}
		1478
		1479	void
		1480	cancel_subs (aio_req_ornot req)
		1481	CODE:
		1482	req_cancel_subs (req);
1425		1483
1426	void	1484	void
1427	result (aio_req grp, ...)	1485	result (aio_req grp, ...)
1428	CODE:	1486	CODE:
1429	{	1487	{
1430	int i;	1488	int i;
		1489	AV *av;
		1490
		1491	grp->errorno = errno;
		1492
1431	AV *av = newAV ();	1493	av = newAV ();
		1494	av_extend (av, items - 1);
1432		1495
1433	for (i = 1; i < items; ++i )	1496	for (i = 1; i < items; ++i )
1434	av_push (av, newSVsv (ST (i)));	1497	av_push (av, newSVsv (ST (i)));
1435		1498
1436	SvREFCNT_dec (grp->data);	1499	SvREFCNT_dec (grp->sv1);
1437	grp->data = (SV *)av;	1500	grp->sv1 = (SV *)av;
1438	}	1501	}
		1502
		1503	void
		1504	errno (aio_req grp, int errorno = errno)
		1505	CODE:
		1506	grp->errorno = errorno;
1439		1507
1440	void	1508	void
1441	limit (aio_req grp, int limit)	1509	limit (aio_req grp, int limit)
1442	CODE:	1510	CODE:
1443	grp->fd2 = limit;	1511	eio_grp_limit (grp, limit);
1444	aio_grp_feed (grp);
1445		1512
1446	void	1513	void
1447	feed (aio_req grp, SV *callback=&PL_sv_undef)	1514	feed (aio_req grp, SV *callback=&PL_sv_undef)
1448	CODE:	1515	CODE:
1449	{	1516	{
1450	SvREFCNT_dec (grp->fh2);	1517	SvREFCNT_dec (grp->sv2);
1451	grp->fh2 = newSVsv (callback);	1518	grp->sv2 = newSVsv (callback);
		1519	grp->feed = aio_grp_feed;
1452		1520
1453	if (grp->fd2 <= 0)	1521	if (grp->int2 <= 0)
1454	grp->fd2 = 2;	1522	grp->int2 = 2;
1455		1523
1456	aio_grp_feed (grp);	1524	eio_grp_limit (grp, grp->int2);
1457	}	1525	}
1458		1526

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