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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.77 by root, Thu Oct 26 13:25:40 2006 UTC vs.
Revision 1.209 by root, Sun Apr 1 17:46:02 2012 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>
36	# elif __freebsd
37	# include <sys/socket.h>
38	# include <sys/uio.h>	21	# include <sys/mman.h>
39	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#define EIO_STRUCT_STAT struct _stati64
		68	#define EIO_STRUCT_STATI64
		69
		70	#else
		71
40	# include <sys/socket.h>	72	#include <sys/time.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	73	#include <sys/select.h>
		74	#include <unistd.h>
		75	#include <utime.h>
		76	#include <signal.h>
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	#endif
		81
		82	/* use NV for 32 bit perls as it allows larger offsets */
		83	#if IVSIZE >= 8
		84	# define VAL64 IV
		85	# define SvVAL64 SvIV
		86	# define newSVval64 newSViv
		87	#else
		88	# define VAL64 NV
		89	# define SvVAL64 SvNV
		90	# define newSVval64 newSVnv
		91	#endif
		92
		93	/*****************************************************************************/
		94
		95	#if __GNUC__ >= 3
		96	# define expect(expr,value) __builtin_expect ((expr),(value))
		97	#else
		98	# define expect(expr,value) (expr)
		99	#endif
		100
		101	#define expect_false(expr) expect ((expr) != 0, 0)
		102	#define expect_true(expr) expect ((expr) != 0, 1)
		103
		104	/*****************************************************************************/
		105
		106	typedef SV SV8; /* byte-sv, used for argument-checking */
		107	typedef int aio_rfd; /* read file desriptor */
		108	typedef int aio_wfd; /* write file descriptor */
		109
		110	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	SV *sv3, *sv4; \
		116	STRLEN stroffset; \
		117	SV *self;
		118
		119	#define EIO_NO_WRAPPERS 1
		120
		121	#include "libeio/config.h"
		122	#include "libeio/eio.h"
		123
		124	static int req_invoke (eio_req *req);
		125	#define EIO_FINISH(req) req_invoke (req)
		126	static void req_destroy (eio_req *grp);
		127	#define EIO_DESTROY(req) req_destroy (req)
		128
		129	#include "libeio/eio.c"
		130
		131	/* Linux/others */
		132	#ifndef O_ASYNC
		133	# define O_ASYNC 0
		134	#endif
		135	#ifndef O_DIRECT
		136	# define O_DIRECT 0
		137	#endif
		138	#ifndef O_NOATIME
		139	# define O_NOATIME 0
		140	#endif
		141
		142	/* POSIX */
		143	#ifndef O_CLOEXEC
		144	# define O_CLOEXEC 0
		145	#endif
		146	#ifndef O_NOFOLLOW
		147	# define O_NOFOLLOW 0
		148	#endif
		149	#ifndef O_NOCTTY
		150	# define O_NOCTTY 0
		151	#endif
		152	#ifndef O_NONBLOCK
		153	# define O_NONBLOCK 0
		154	#endif
		155	#ifndef O_EXEC
		156	# define O_EXEC 0
		157	#endif
		158	#ifndef O_SEARCH
		159	# define O_SEARCH 0
		160	#endif
		161	#ifndef O_DIRECTORY
		162	# define O_DIRECTORY 0
		163	#endif
		164	#ifndef O_DSYNC
		165	# define O_DSYNC 0
		166	#endif
		167	#ifndef O_RSYNC
		168	# define O_RSYNC 0
		169	#endif
		170	#ifndef O_SYNC
		171	# define O_SYNC 0
		172	#endif
		173	#ifndef O_TTY_INIT
		174	# define O_TTY_INIT 0
		175	#endif
		176
		177	#ifndef POSIX_FADV_NORMAL
		178	# define POSIX_FADV_NORMAL 0
		179	#endif
		180	#ifndef POSIX_FADV_SEQUENTIAL
		181	# define POSIX_FADV_SEQUENTIAL 0
		182	#endif
		183	#ifndef POSIX_FADV_RANDOM
		184	# define POSIX_FADV_RANDOM 0
		185	#endif
		186	#ifndef POSIX_FADV_NOREUSE
		187	# define POSIX_FADV_NOREUSE 0
		188	#endif
		189	#ifndef POSIX_FADV_WILLNEED
		190	# define POSIX_FADV_WILLNEED 0
		191	#endif
		192	#ifndef POSIX_FADV_DONTNEED
		193	# define POSIX_FADV_DONTNEED 0
		194	#endif
		195
		196	#if !HAVE_POSIX_FADVISE
		197	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#ifndef POSIX_MADV_NORMAL
		201	# define POSIX_MADV_NORMAL 0
		202	#endif
		203	#ifndef POSIX_MADV_SEQUENTIAL
		204	# define POSIX_MADV_SEQUENTIAL 0
		205	#endif
		206	#ifndef POSIX_MADV_RANDOM
		207	# define POSIX_MADV_RANDOM 0
		208	#endif
		209	#ifndef POSIX_MADV_WILLNEED
		210	# define POSIX_MADV_WILLNEED 0
		211	#endif
		212	#ifndef POSIX_MADV_DONTNEED
		213	# define POSIX_MADV_DONTNEED 0
		214	#endif
		215
		216	#if !HAVE_POSIX_MADVISE
		217	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		218	#endif
		219
		220	#ifndef PROT_NONE
		221	# define PROT_NONE 0
		222	#endif
		223	#ifndef PROT_READ
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_WRITE
		227	# define PROT_READ 0
		228	#endif
		229	#ifndef PROT_EXEC
		230	# define PROT_EXEC 0
		231	#endif
		232
		233	#ifndef ST_RDONLY
		234	# define ST_RDONLY 0
		235	#endif
		236	#ifndef ST_NOSUID
		237	# define ST_NOSUID 0
		238	#endif
		239	#ifndef ST_NODEV
		240	# define ST_NODEV 0
		241	#endif
		242	#ifndef ST_NOEXEC
		243	# define ST_NOEXEC 0
		244	#endif
		245	#ifndef ST_SYNCHRONOUS
		246	# define ST_SYNCHRONOUS 0
		247	#endif
		248	#ifndef ST_MANDLOCK
		249	# define ST_MANDLOCK 0
		250	#endif
		251	#ifndef ST_WRITE
		252	# define ST_WRITE 0
		253	#endif
		254	#ifndef ST_APPEND
		255	# define ST_APPEND 0
		256	#endif
		257	#ifndef ST_IMMUTABLE
		258	# define ST_IMMUTABLE 0
		259	#endif
		260	#ifndef ST_NOATIME
		261	# define ST_NOATIME 0
		262	#endif
		263	#ifndef ST_NODIRATIME
		264	# define ST_NODIRATIME 0
		265	#endif
		266	#ifndef ST_RELATIME
		267	# define ST_RELATIME 0
		268	#endif
		269
		270	#ifndef S_IFIFO
		271	# define S_IFIFO 0
		272	#endif
		273	#ifndef S_IFCHR
		274	# define S_IFCHR 0
		275	#endif
		276	#ifndef S_IFBLK
		277	# define S_IFBLK 0
		278	#endif
		279	#ifndef S_IFLNK
		280	# define S_IFLNK 0
		281	#endif
		282	#ifndef S_IFREG
		283	# define S_IFREG 0
		284	#endif
		285	#ifndef S_IFDIR
		286	# define S_IFDIR 0
		287	#endif
		288	#ifndef S_IFWHT
		289	# define S_IFWHT 0
		290	#endif
		291	#ifndef S_IFSOCK
		292	# define S_IFSOCK 0
		293	#endif
		294
		295	#ifndef MAP_ANONYMOUS
		296	# ifdef MAP_ANON
		297	# define MAP_ANONYMOUS MAP_ANON
43	# else	298	# else
44	# error sendfile support requested but not available	299	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	300	# endif
46	#endif	301	#endif
47		302	#ifndef MAP_HUGETLB
48	/* used for struct dirent, AIX doesn't provide it */	303	# define MAP_HUGETLB 0
49	#ifndef NAME_MAX
50	# define NAME_MAX 4096
51	#endif	304	#endif
52		305	#ifndef MAP_LOCKED
53	#ifndef PTHREAD_STACK_MIN	306	# define MAP_LOCKED 0
54	/* care for broken platforms, e.g. windows */
55	# define PTHREAD_STACK_MIN 16384
56	#endif	307	#endif
57		308	#ifndef MAP_NORESERVE
58	#if __ia64	309	# define MAP_NORESERVE 0
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif	310	#endif
		311	#ifndef MAP_POPULATE
		312	# define MAP_POPULATE 0
		313	#endif
		314	#ifndef MAP_NONBLOCK
		315	# define MAP_NONBLOCK 0
		316	#endif
65		317
66	/* buffer size for various temporary buffers */	318	#ifndef makedev
67	#define AIO_BUFSIZE 65536	319	# define makedev(maj,min) (((maj) << 8) | (min))
		320	#endif
		321	#ifndef major
		322	# define major(dev) ((dev) >> 8)
		323	#endif
		324	#ifndef minor
		325	# define minor(dev) ((dev) & 0xff)
		326	#endif
68		327
69	#define dBUF \	328	#ifndef PAGESIZE
70	char *aio_buf; \	329	# define PAGESIZE sysconf (_SC_PAGESIZE)
71	LOCK (wrklock); \	330	#endif
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73	UNLOCK (wrklock); \
74	if (!aio_buf) \
75	return -1;
76		331
77	enum {	332	enum {
78	REQ_QUIT,	333	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
79	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
83	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85	REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,
87	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,
89	};	334	};
90		335
91	#define AIO_REQ_KLASS "IO::AIO::REQ"
92	#define AIO_GRP_KLASS "IO::AIO::GRP"
93
94	typedef struct aio_cb
95	{
96	struct aio_cb *volatile next;
97
98	SV *data, *callback;
99	SV *fh, *fh2;
100	void *dataptr, *data2ptr;
101	Stat_t *statdata;
102	off_t offset;
103	size_t length;
104	ssize_t result;
105
106	STRLEN dataoffset;
107	int type;
108	int fd, fd2;
109	int errorno;
110	mode_t mode; /* open */
111
112	unsigned char flags;
113	unsigned char pri;
114
115	SV *self; /* the perl counterpart of this request, if any */
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
117	} aio_cb;
118
119	enum {
120	FLAG_CANCELLED = 0x01,
121	};
122
123	typedef aio_cb *aio_req;	336	typedef eio_req *aio_req;
124	typedef aio_cb *aio_req_ornot;	337	typedef eio_req *aio_req_ornot;
		338	typedef eio_wd aio_wd;
125		339
126	enum {	340	static SV *on_next_submit;
127	PRI_MIN = -4,	341	static int next_pri = EIO_PRI_DEFAULT;
128	PRI_MAX = 4,	342	static int max_outstanding;
129		343
130	DEFAULT_PRI = 0,	344	static s_epipe respipe;
131	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};
134		345
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
137	static int started, wanted;
138	static volatile int nreqs;
139	static int respipe [2];
140
141	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
142	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
143	#else
144	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
145	#endif
146
147	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
148	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
149
150	/* worker threads management */
151	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
152
153	typedef struct worker {
154	/* locked by wrklock */
155	struct worker *prev, *next;
156
157	pthread_t tid;
158
159	/* locked by reslock, reqlock or wrklock */
160	aio_req req; /* currently processed request */
161	void *dbuf;
162	DIR *dirp;
163	} worker;
164
165	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
166
167	static void worker_clear (worker *wrk)
168	{
169	if (wrk->dirp)
170	{
171	closedir (wrk->dirp);
172	wrk->dirp = 0;
173	}
174
175	if (wrk->dbuf)
176	{
177	free (wrk->dbuf);
178	wrk->dbuf = 0;
179	}
180	}
181
182	static void worker_free (worker *wrk)
183	{
184	wrk->next->prev = wrk->prev;
185	wrk->prev->next = wrk->next;
186
187	free (wrk);
188	}
189
190	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
191	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
192	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
193
194	/*
195	* a somewhat faster data structure might be nice, but
196	* with 8 priorities this actually needs <20 insns
197	* per shift, the most expensive operation.
198	*/
199	typedef struct {
200	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
201	int size;
202	} reqq;
203
204	static reqq req_queue;
205	static reqq res_queue;
206
207	int reqq_push (reqq *q, aio_req req)
208	{
209	int pri = req->pri;
210	req->next = 0;
211
212	if (q->qe[pri])
213	{
214	q->qe[pri]->next = req;
215	q->qe[pri] = req;
216	}
217	else
218	q->qe[pri] = q->qs[pri] = req;
219
220	return q->size++;
221	}
222
223	aio_req reqq_shift (reqq *q)
224	{
225	int pri;
226
227	if (!q->size)
228	return 0;
229
230	--q->size;
231
232	for (pri = NUM_PRI; pri--; )
233	{
234	aio_req req = q->qs[pri];
235
236	if (req)
237	{
238	if (!(q->qs[pri] = req->next))
239	q->qe[pri] = 0;
240
241	return req;
242	}
243	}
244
245	abort ();
246	}
247
248	static int poll_cb (int max);
249	static void req_invoke (aio_req req);
250	static void req_free (aio_req req);	346	static void req_destroy (aio_req req);
251	static void req_cancel (aio_req req);	347	static void req_cancel (aio_req req);
252		348
		349	static void
		350	want_poll (void)
		351	{
		352	/* write a dummy byte to the pipe so fh becomes ready */
		353	s_epipe_signal (&respipe);
		354	}
		355
		356	static void
		357	done_poll (void)
		358	{
		359	/* read any signals sent by the worker threads */
		360	s_epipe_drain (&respipe);
		361	}
		362
253	/* must be called at most once */	363	/* must be called at most once */
254	static SV *req_sv (aio_req req, const char *klass)	364	static SV *
		365	req_sv (aio_req req, HV *stash)
255	{	366	{
256	if (!req->self)	367	if (!req->self)
257	{	368	{
258	req->self = (SV *)newHV ();	369	req->self = (SV *)newHV ();
259	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
260	}	371	}
261		372
262	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	373	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
263	}	374	}
264		375
265	static aio_req SvAIO_REQ (SV *sv)	376	static SV *
		377	newSVaio_wd (aio_wd wd)
		378	{
		379	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		380	}
		381
		382	static aio_req
		383	SvAIO_REQ (SV *sv)
266	{	384	{
267	MAGIC *mg;	385	MAGIC *mg;
268		386
269	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	387	if (!SvROK (sv)
		388	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		389	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		390	&& SvSTASH (SvRV (sv)) != aio_req_stash
		391	&& !sv_derived_from (sv, "IO::AIO::REQ")))
270	croak ("object of class " AIO_REQ_KLASS " expected");	392	croak ("object of class IO::AIO::REQ expected");
271		393
272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	394	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
273		395
274	return mg ? (aio_req)mg->mg_ptr : 0;	396	return mg ? (aio_req)mg->mg_ptr : 0;
275	}	397	}
276		398
		399	static aio_wd
		400	SvAIO_WD (SV *sv)
		401	{
		402	if (!SvROK (sv)
		403	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		404	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		405	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		406
		407	return (aio_wd)(long)SvIVX (SvRV (sv));
		408	}
		409
		410	static void
277	static void aio_grp_feed (aio_req grp)	411	aio_grp_feed (aio_req grp)
278	{	412	{
279	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	413	if (grp->sv2 && SvOK (grp->sv2))
280	{	414	{
281	int old_len = grp->length;
282
283	if (grp->fh2 && SvOK (grp->fh2))
284	{
285	dSP;	415	dSP;
286		416
287	ENTER;	417	ENTER;
288	SAVETMPS;	418	SAVETMPS;
289	PUSHMARK (SP);	419	PUSHMARK (SP);
290	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	420	XPUSHs (req_sv (grp, aio_grp_stash));
291	PUTBACK;	421	PUTBACK;
292	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	422	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
293	SPAGAIN;	423	SPAGAIN;
294	FREETMPS;	424	FREETMPS;
295	LEAVE;	425	LEAVE;
296	}
297
298	/* stop if no progress has been made */
299	if (old_len == grp->length)
300	{
301	SvREFCNT_dec (grp->fh2);
302	grp->fh2 = 0;
303	break;
304	}
305	}	426	}
306	}	427	}
307		428
308	static void aio_grp_dec (aio_req grp)	429	static void
		430	req_submit (eio_req *req)
309	{	431	{
310	--grp->length;	432	eio_submit (req);
311		433
312	/* call feeder, if applicable */	434	if (expect_false (on_next_submit))
313	aio_grp_feed (grp);
314
315	/* finish, if done */
316	if (!grp->length && grp->fd)
317	{	435	{
318	req_invoke (grp);	436	dSP;
319	req_free (grp);	437	SV *cb = sv_2mortal (on_next_submit);
		438
		439	on_next_submit = 0;
		440
		441	PUSHMARK (SP);
		442	PUTBACK;
		443	call_sv (cb, G_DISCARD | G_EVAL);
320	}	444	}
321	}	445	}
322		446
323	static void poll_wait ()	447	static int
		448	req_invoke (eio_req *req)
324	{	449	{
325	fd_set rfd;	450	if (req->flags & FLAG_SV2_RO_OFF)
		451	SvREADONLY_off (req->sv2);
326		452
327	while (nreqs)	453	if (!EIO_CANCELLED (req) && req->callback)
328	{	454	{
329	int size;
330	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
331	LOCK (reslock);
332	#endif
333	size = res_queue.size;
334	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
335	UNLOCK (reslock);
336	#endif
337
338	if (size)
339	return;
340
341	FD_ZERO(&rfd);
342	FD_SET(respipe [0], &rfd);
343
344	select (respipe [0] + 1, &rfd, 0, 0, 0);
345	}
346	}
347
348	static void req_invoke (aio_req req)
349	{
350	dSP;	455	dSP;
351		456	static SV *sv_result_cache; /* caches the result integer SV */
352	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	457	SV *sv_result;
353	{
354	errno = req->errorno;
355		458
356	ENTER;	459	ENTER;
357	SAVETMPS;	460	SAVETMPS;
358	PUSHMARK (SP);	461	PUSHMARK (SP);
359	EXTEND (SP, 1);	462	EXTEND (SP, 1);
360		463
		464	/* do not recreate the result IV from scratch each time */
		465	if (expect_true (sv_result_cache))
		466	{
		467	sv_result = sv_result_cache; sv_result_cache = 0;
		468	SvIV_set (sv_result, req->result);
		469	SvIOK_only (sv_result);
		470	}
		471	else
		472	{
		473	sv_result = newSViv (req->result);
		474	SvREADONLY_on (sv_result);
		475	}
		476
361	switch (req->type)	477	switch (req->type)
362	{	478	{
		479	case EIO_WD_OPEN:
		480	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		481	break;
		482
363	case REQ_READDIR:	483	case EIO_READDIR:
364	{	484	{
365	SV *rv = &PL_sv_undef;	485	SV *rv = &PL_sv_undef;
366		486
367	if (req->result >= 0)	487	if (req->result >= 0)
368	{	488	{
369	int i;	489	int i;
370	char *buf = req->data2ptr;	490	char *names = (char *)req->ptr2;
		491	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
371	AV *av = newAV ();	492	AV *av = newAV ();
372		493
373	av_extend (av, req->result - 1);	494	av_extend (av, req->result - 1);
374		495
375	for (i = 0; i < req->result; ++i)	496	for (i = 0; i < req->result; ++i)
376	{	497	{
377	SV *sv = newSVpv (buf, 0);	498	if (req->int1 & EIO_READDIR_DENTS)
		499	{
		500	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
378		501
		502	if (req->int1 & EIO_READDIR_CUSTOM2)
		503	{
		504	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		505	AV *avent = newAV ();
		506
		507	av_extend (avent, 2);
		508
		509	if (!sv_type [ent->type])
		510	{
		511	sv_type [ent->type] = newSViv (ent->type);
		512	SvREADONLY_on (sv_type [ent->type]);
		513	}
		514
		515	av_store (avent, 0, namesv);
		516	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		517	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		518
		519	av_store (av, i, newRV_noinc ((SV *)avent));
		520	}
		521	else
379	av_store (av, i, sv);	522	av_store (av, i, namesv);
		523
		524	++ent;
		525	}
		526	else
		527	{
		528	SV *name = newSVpv (names, 0);
		529	av_store (av, i, name);
380	buf += SvCUR (sv) + 1;	530	names += SvCUR (name) + 1;
		531	}
381	}	532	}
382		533
383	rv = sv_2mortal (newRV_noinc ((SV *)av));	534	rv = sv_2mortal (newRV_noinc ((SV *)av));
384	}	535	}
385		536
386	PUSHs (rv);	537	PUSHs (rv);
		538
		539	if (req->int1 & EIO_READDIR_CUSTOM1)
		540	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
387	}	541	}
388	break;	542	break;
389		543
390	case REQ_OPEN:	544	case EIO_OPEN:
391	{	545	{
392	/* convert fd to fh */	546	/* convert fd to fh */
393	SV *fh;	547	SV *fh = &PL_sv_undef;
394		548
395	PUSHs (sv_2mortal (newSViv (req->result)));	549	if (req->result >= 0)
396	PUTBACK;	550	{
397	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	551	GV *gv = (GV *)sv_newmortal ();
398	SPAGAIN;	552	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		553	char sym [64];
		554	int symlen;
		555
		556	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		557	gv_init (gv, aio_stash, sym, symlen, 0);
399		558
400	fh = SvREFCNT_inc (POPs);	559	symlen = snprintf (
		560	sym,
		561	sizeof (sym),
		562	"%s&=%d",
		563	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		564	(int)req->result
		565	);
401		566
		567	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		568	fh = (SV *)gv;
		569	}
		570
402	PUSHMARK (SP);	571	PUSHs (fh);
403	XPUSHs (sv_2mortal (fh));
404	}	572	}
405	break;	573	break;
406		574
		575	case EIO_STATVFS:
		576	case EIO_FSTATVFS:
		577	{
		578	SV *rv = &PL_sv_undef;
		579
		580	#ifndef _WIN32
		581	if (req->result >= 0)
		582	{
		583	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		584	HV *hv = newHV ();
		585
		586	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		587
		588	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		589	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		590	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		591	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		592	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		593	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		594	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		595	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		596	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		597	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		598	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		599	}
		600	#endif
		601
		602	PUSHs (rv);
		603	}
		604
		605	break;
		606
407	case REQ_GROUP:	607	case EIO_GROUP:
408	req->fd = 2; /* mark group as finished */	608	req->int1 = 2; /* mark group as finished */
409		609
410	if (req->data)	610	if (req->sv1)
411	{	611	{
412	int i;	612	int i;
413	AV *av = (AV *)req->data;	613	AV *av = (AV *)req->sv1;
414		614
415	EXTEND (SP, AvFILL (av) + 1);	615	EXTEND (SP, AvFILL (av) + 1);
416	for (i = 0; i <= AvFILL (av); ++i)	616	for (i = 0; i <= AvFILL (av); ++i)
417	PUSHs (*av_fetch (av, i, 0));	617	PUSHs (*av_fetch (av, i, 0));
418	}	618	}
419	break;	619	break;
420		620
421	case REQ_NOP:	621	case EIO_NOP:
422	case REQ_BUSY:	622	case EIO_BUSY:
423	break;	623	break;
424		624
		625	case EIO_READLINK:
		626	case EIO_REALPATH:
		627	if (req->result > 0)
		628	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		629	break;
		630
		631	case EIO_STAT:
		632	case EIO_LSTAT:
		633	case EIO_FSTAT:
		634	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		635
		636	if (!(PL_laststatval = req->result))
		637	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		638	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		639
		640	PUSHs (sv_result);
		641	break;
		642
		643	case EIO_SEEK:
		644	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		645	break;
		646
		647	case EIO_READ:
		648	{
		649	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		650	*SvEND (req->sv2) = 0;
		651	SvPOK_only (req->sv2);
		652	SvSETMAGIC (req->sv2);
		653	PUSHs (sv_result);
		654	}
		655	break;
		656
		657	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		658	if (req->result > 0)
		659	SvIV_set (sv_result, 0);
		660	/* FALLTHROUGH */
		661
425	default:	662	default:
426	PUSHs (sv_2mortal (newSViv (req->result)));	663	PUSHs (sv_result);
427	break;	664	break;
428	}	665	}
429		666
		667	errno = req->errorno;
430		668
431	PUTBACK;	669	PUTBACK;
432	call_sv (req->callback, G_VOID | G_EVAL);	670	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
433	SPAGAIN;	671	SPAGAIN;
		672
		673	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		674	SvREFCNT_dec (sv_result);
		675	else
		676	sv_result_cache = sv_result;
434		677
435	FREETMPS;	678	FREETMPS;
436	LEAVE;	679	LEAVE;
		680
		681	PUTBACK;
437	}	682	}
438		683
439	if (req->grp)	684	return !!SvTRUE (ERRSV);
440	{
441	aio_req grp = req->grp;
442
443	/* unlink request */
444	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
445	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
446
447	if (grp->grp_first == req)
448	grp->grp_first = req->grp_next;
449
450	aio_grp_dec (grp);
451	}
452
453	if (SvTRUE (ERRSV))
454	{
455	req_free (req);
456	croak (0);
457	}
458	}	685	}
459		686
460	static void req_free (aio_req req)	687	static void
		688	req_destroy (aio_req req)
461	{	689	{
462	if (req->self)	690	if (req->self)
463	{	691	{
464	sv_unmagic (req->self, PERL_MAGIC_ext);	692	sv_unmagic (req->self, PERL_MAGIC_ext);
465	SvREFCNT_dec (req->self);	693	SvREFCNT_dec (req->self);
466	}	694	}
467		695
468	SvREFCNT_dec (req->data);
469	SvREFCNT_dec (req->fh);	696	SvREFCNT_dec (req->sv1);
470	SvREFCNT_dec (req->fh2);	697	SvREFCNT_dec (req->sv2);
		698	SvREFCNT_dec (req->sv3);
		699	SvREFCNT_dec (req->sv4);
471	SvREFCNT_dec (req->callback);	700	SvREFCNT_dec (req->callback);
472	Safefree (req->statdata);
473		701
474	if (req->type == REQ_READDIR)
475	free (req->data2ptr);
476
477	Safefree (req);	702	free (req);
478	}	703	}
479		704
		705	static void
480	static void req_cancel_subs (aio_req grp)	706	req_cancel_subs (aio_req grp)
481	{	707	{
482	aio_req sub;
483
484	if (grp->type != REQ_GROUP)	708	if (grp->type != EIO_GROUP)
485	return;	709	return;
486		710
487	SvREFCNT_dec (grp->fh2);	711	SvREFCNT_dec (grp->sv2);
488	grp->fh2 = 0;	712	grp->sv2 = 0;
489		713
490	for (sub = grp->grp_first; sub; sub = sub->grp_next)	714	eio_grp_cancel (grp);
491	req_cancel (sub);
492	}	715	}
493		716
494	static void req_cancel (aio_req req)	717	static void ecb_cold
		718	create_respipe (void)
495	{	719	{
496	req->flags |= FLAG_CANCELLED;	720	if (s_epipe_renew (&respipe))
497		721	croak ("IO::AIO: unable to initialize result pipe");
498	req_cancel_subs (req);
499	}	722	}
500		723
501	static int poll_cb (int max)	724	static void
		725	poll_wait (void)
502	{	726	{
503	dSP;	727	while (eio_nreqs ())
504	int count = 0;	728	{
505	int do_croak = 0;	729	int size;
		730
		731	X_LOCK (reslock);
		732	size = res_queue.size;
		733	X_UNLOCK (reslock);
		734
		735	if (size)
		736	return;
		737
		738	etp_maybe_start_thread ();
		739
		740	s_epipe_wait (&respipe);
		741	}
		742	}
		743
		744	static int
		745	poll_cb (void)
		746	{
		747	for (;;)
		748	{
		749	int res = eio_poll ();
		750
		751	if (res > 0)
		752	croak (0);
		753
		754	if (!max_outstanding || max_outstanding > eio_nreqs ())
		755	return res;
		756
		757	poll_wait ();
		758	}
		759	}
		760
		761	static void ecb_cold
		762	reinit (void)
		763	{
		764	create_respipe ();
		765
		766	if (eio_init (want_poll, done_poll) < 0)
		767	croak ("IO::AIO: unable to initialise eio library");
		768	}
		769
		770	/*****************************************************************************/
		771
		772	#if !_POSIX_MAPPED_FILES
		773	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		774	# define munmap(addr,length) (errno = ENOSYS, -1)
		775	#endif
		776
		777	#if !_POSIX_MEMORY_PROTECTION
		778	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		779	# define PROT_NONE 0
		780	# define PROT_WRITE 0
		781	# define MAP_PRIVATE 0
		782	# define MAP_SHARED 0
		783	# define MAP_FIXED 0
		784	#endif
		785
		786	#define MMAP_MAGIC PERL_MAGIC_ext
		787
		788	static int ecb_cold
		789	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		790	{
		791	int old_errno = errno;
		792	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		793	errno = old_errno;
		794
		795	mg->mg_obj = 0; /* just in case */
		796
		797	SvREADONLY_off (sv);
		798
		799	if (SvPVX (sv) != mg->mg_ptr)
		800	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		801
		802	SvCUR_set (sv, 0);
		803	SvPVX (sv) = 0;
		804	SvOK_off (sv);
		805
		806	return 0;
		807	}
		808
		809	static MGVTBL mmap_vtbl = {
		810	0, 0, 0, 0, mmap_free
		811	};
		812
		813	/*****************************************************************************/
		814
		815	static SV *
		816	get_cb (SV *cb_sv)
		817	{
		818	SvGETMAGIC (cb_sv);
		819	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		820	}
		821
		822	static aio_req ecb_noinline
		823	dreq (SV *callback)
		824	{
		825	SV *cb_cv;
506	aio_req req;	826	aio_req req;
		827	int req_pri = next_pri;
		828	next_pri = EIO_PRI_DEFAULT;
507		829
508	while (max <= 0 || count < max)	830	cb_cv = get_cb (callback);
		831
		832	req = calloc (sizeof (*req), 1);
		833	if (!req)
		834	croak ("out of memory during eio_req allocation");
		835
		836	req->callback = SvREFCNT_inc (cb_cv);
		837	req->pri = req_pri;
		838
		839	return req;
		840	}
		841
		842	#define dREQ \
		843	aio_req req = dreq (callback); \
		844
		845	#define REQ_SEND \
		846	PUTBACK; \
		847	req_submit (req); \
		848	SPAGAIN; \
		849	\
		850	if (GIMME_V != G_VOID) \
		851	XPUSHs (req_sv (req, aio_req_stash));
		852
		853	ecb_inline void
		854	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		855	{
		856	if (expect_false (SvROK (path)))
509	{	857	{
510	LOCK (reslock);	858	SV *rv = SvRV (path);
511	req = reqq_shift (&res_queue);	859	SV *wdob;
512		860
513	if (req)	861	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
514	{	862	{
515	if (!res_queue.size)	863	path = AvARRAY (rv)[1];
		864	wdob = AvARRAY (rv)[0];
		865
		866	if (SvOK (wdob))
516	{	867	{
517	/* read any signals sent by the worker threads */	868	*wd = SvAIO_WD (wdob);
518	char buf [32];	869	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
519	while (read (respipe [0], buf, 32) == 32)
520	;
521	}	870	}
		871	else
		872	*wd = EIO_INVALID_WD;
522	}	873	}
523		874	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
524	UNLOCK (reslock);
525
526	if (!req)
527	break;
528
529	--nreqs;
530
531	if (req->type == REQ_QUIT)
532	started--;
533	else if (req->type == REQ_GROUP && req->length)
534	{	875	{
535	req->fd = 1; /* mark request as delayed */	876	*wd = (aio_wd)(long)SvIVX (rv);
536	continue;	877	*wdsv = SvREFCNT_inc_NN (rv);
		878	*ptr = ".";
		879	return; /* path set to "." */
537	}	880	}
538	else	881	else
539	{	882	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
540	if (req->type == REQ_READ)
541	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
542
543	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
544	SvREADONLY_off (req->data);
545
546	if (req->statdata)
547	{
548	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
549	PL_laststatval = req->result;
550	PL_statcache = *(req->statdata);
551	}
552
553	req_invoke (req);
554
555	count++;
556	}
557
558	req_free (req);
559	}	883	}
560		884
561	return count;	885	*pathsv = newSVsv (path);
		886	*ptr = SvPVbyte_nolen (*pathsv);
562	}	887	}
563		888
564	static void *aio_proc(void *arg);	889	static void ecb_noinline
565		890	req_set_path1 (aio_req req, SV *path)
566	static void start_thread (void)
567	{	891	{
568	sigset_t fullsigset, oldsigset;	892	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
569	pthread_attr_t attr;	893	}
570		894
571	worker *wrk = calloc (1, sizeof (worker));	895	static void ecb_noinline
		896	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		897	{
		898	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
572		899
573	if (!wrk)	900	switch (SvTYPE (rv))
574	croak ("unable to allocate worker thread data");
575
576	pthread_attr_init (&attr);
577	pthread_attr_setstacksize (&attr, STACKSIZE);
578	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
579
580	sigfillset (&fullsigset);
581
582	LOCK (wrklock);
583	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
584
585	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
586	{	901	{
587	wrk->prev = &wrk_first;	902	case SVt_PVIO:
588	wrk->next = wrk_first.next;	903	case SVt_PVLV:
589	wrk_first.next->prev = wrk;	904	case SVt_PVGV:
590	wrk_first.next = wrk;	905	req->type = type_fh;
591	started++;	906	req->sv1 = newSVsv (fh_or_path);
		907	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		908	break;
		909
		910	default:
		911	req->type = type_path;
		912	req_set_path1 (req, fh_or_path);
		913	break;
592	}	914	}
593	else
594	free (wrk);
595
596	sigprocmask (SIG_SETMASK, &oldsigset, 0);
597	UNLOCK (wrklock);
598	}	915	}
599		916
600	static void req_send (aio_req req)	917	XS(boot_IO__AIO) ecb_cold;
601	{
602	while (started < wanted && nreqs >= started)
603	start_thread ();
604		918
605	++nreqs;	919	MODULE = IO::AIO PACKAGE = IO::AIO
606		920
607	LOCK (reqlock);	921	PROTOTYPES: ENABLE
608	reqq_push (&req_queue, req);
609	pthread_cond_signal (&reqwait);
610	UNLOCK (reqlock);
611	}
612		922
613	static void end_thread (void)	923	BOOT:
614	{	924	{
615	aio_req req;	925	static const struct {
		926	const char *name;
		927	IV iv;
		928	} *civ, const_iv[] = {
		929	# define const_niv(name, value) { # name, (IV) value },
		930	# define const_iv(name) { # name, (IV) name },
		931	# define const_eio(name) { # name, (IV) EIO_ ## name },
		932	const_iv (EXDEV)
		933	const_iv (ENOSYS)
		934	const_iv (O_RDONLY)
		935	const_iv (O_WRONLY)
		936	const_iv (O_RDWR)
		937	const_iv (O_CREAT)
		938	const_iv (O_TRUNC)
		939	const_iv (O_EXCL)
		940	const_iv (O_APPEND)
616		941
617	Newz (0, req, 1, aio_cb);	942	const_iv (O_ASYNC)
		943	const_iv (O_DIRECT)
		944	const_iv (O_NOATIME)
618		945
619	req->type = REQ_QUIT;	946	const_iv (O_CLOEXEC)
620	req->pri = PRI_MAX + PRI_BIAS;	947	const_iv (O_NOCTTY)
		948	const_iv (O_NOFOLLOW)
		949	const_iv (O_NONBLOCK)
		950	const_iv (O_EXEC)
		951	const_iv (O_SEARCH)
		952	const_iv (O_DIRECTORY)
		953	const_iv (O_DSYNC)
		954	const_iv (O_RSYNC)
		955	const_iv (O_SYNC)
		956	const_iv (O_TTY_INIT)
621		957
622	req_send (req);	958	const_iv (S_IFIFO)
623	}	959	const_iv (S_IFCHR)
		960	const_iv (S_IFBLK)
		961	const_iv (S_IFLNK)
		962	const_iv (S_IFREG)
		963	const_iv (S_IFDIR)
		964	const_iv (S_IFWHT)
		965	const_iv (S_IFSOCK)
		966	const_iv (S_IFMT)
624		967
625	static void min_parallel (int nthreads)	968	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
626	{	969	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
627	if (wanted < nthreads)	970	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
628	wanted = nthreads;	971	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
629	}	972	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		973	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
630		974
631	static void max_parallel (int nthreads)	975	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
632	{	976	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
633	int cur = started;	977	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		978	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		979	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
634		980
635	if (wanted > nthreads)	981	const_iv (ST_RDONLY)
636	wanted = nthreads;	982	const_iv (ST_NOSUID)
		983	const_iv (ST_NODEV)
		984	const_iv (ST_NOEXEC)
		985	const_iv (ST_SYNCHRONOUS)
		986	const_iv (ST_MANDLOCK)
		987	const_iv (ST_WRITE)
		988	const_iv (ST_APPEND)
		989	const_iv (ST_IMMUTABLE)
		990	const_iv (ST_NOATIME)
		991	const_iv (ST_NODIRATIME)
		992	const_iv (ST_RELATIME)
637		993
638	while (cur > wanted)	994	const_iv (PROT_NONE)
639	{	995	const_iv (PROT_EXEC)
640	end_thread ();	996	const_iv (PROT_READ)
641	cur--;	997	const_iv (PROT_WRITE)
642	}
643		998
644	while (started > wanted)	999	/*const_iv (MAP_FIXED)*/
645	{	1000	const_iv (MAP_PRIVATE)
646	poll_wait ();	1001	const_iv (MAP_SHARED)
647	poll_cb (0);	1002	const_iv (MAP_ANONYMOUS)
648	}
649	}
650		1003
651	static void create_pipe ()	1004	/* linuxish */
652	{	1005	const_iv (MAP_HUGETLB)
653	if (pipe (respipe))	1006	const_iv (MAP_LOCKED)
654	croak ("unable to initialize result pipe");	1007	const_iv (MAP_NORESERVE)
		1008	const_iv (MAP_POPULATE)
		1009	const_iv (MAP_NONBLOCK)
655		1010
656	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1011	const_eio (SEEK_SET)
657	croak ("cannot set result pipe to nonblocking mode");	1012	const_eio (SEEK_CUR)
		1013	const_eio (SEEK_END)
658		1014
659	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1015	const_eio (MCL_FUTURE)
660	croak ("cannot set result pipe to nonblocking mode");	1016	const_eio (MCL_CURRENT)
661	}
662		1017
663	/*****************************************************************************/	1018	const_eio (MS_ASYNC)
664	/* work around various missing functions */	1019	const_eio (MS_INVALIDATE)
		1020	const_eio (MS_SYNC)
665		1021
666	#if !HAVE_PREADWRITE	1022	const_eio (MT_MODIFY)
667	# define pread aio_pread
668	# define pwrite aio_pwrite
669		1023
670	/*	1024	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
671	* make our pread/pwrite safe against themselves, but not against	1025	const_eio (SYNC_FILE_RANGE_WRITE)
672	* normal read/write by using a mutex. slows down execution a lot,	1026	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
673	* but that's your problem, not mine.
674	*/
675	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
676		1027
677	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1028	const_eio (FALLOC_FL_KEEP_SIZE)
678	{
679	ssize_t res;
680	off_t ooffset;
681		1029
682	LOCK (preadwritelock);	1030	const_eio (READDIR_DENTS)
683	ooffset = lseek (fd, 0, SEEK_CUR);	1031	const_eio (READDIR_DIRS_FIRST)
684	lseek (fd, offset, SEEK_SET);	1032	const_eio (READDIR_STAT_ORDER)
685	res = read (fd, buf, count);	1033	const_eio (READDIR_FOUND_UNKNOWN)
686	lseek (fd, ooffset, SEEK_SET);
687	UNLOCK (preadwritelock);
688		1034
689	return res;	1035	const_eio (DT_UNKNOWN)
690	}	1036	const_eio (DT_FIFO)
691		1037	const_eio (DT_CHR)
692	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1038	const_eio (DT_DIR)
693	{	1039	const_eio (DT_BLK)
694	ssize_t res;	1040	const_eio (DT_REG)
695	off_t ooffset;	1041	const_eio (DT_LNK)
696		1042	const_eio (DT_SOCK)
697	LOCK (preadwritelock);	1043	const_eio (DT_WHT)
698	ooffset = lseek (fd, 0, SEEK_CUR);
699	lseek (fd, offset, SEEK_SET);
700	res = write (fd, buf, count);
701	lseek (fd, offset, SEEK_SET);
702	UNLOCK (preadwritelock);
703
704	return res;
705	}
706	#endif
707
708	#if !HAVE_FDATASYNC
709	# define fdatasync fsync
710	#endif
711
712	#if !HAVE_READAHEAD
713	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
714
715	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
716	{
717	dBUF;
718
719	while (count > 0)
720	{
721	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
722
723	pread (fd, aio_buf, len, offset);
724	offset += len;
725	count -= len;
726	}
727
728	errno = 0;
729	}
730
731	#endif
732
733	#if !HAVE_READDIR_R
734	# define readdir_r aio_readdir_r
735
736	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
737
738	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
739	{
740	struct dirent *e;
741	int errorno;
742
743	LOCK (readdirlock);
744
745	e = readdir (dirp);
746	errorno = errno;
747
748	if (e)
749	{
750	*res = ent;
751	strcpy (ent->d_name, e->d_name);
752	}
753	else
754	*res = 0;
755
756	UNLOCK (readdirlock);
757
758	errno = errorno;
759	return e ? 0 : -1;
760	}
761	#endif
762
763	/* sendfile always needs emulation */
764	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
765	{
766	ssize_t res;
767
768	if (!count)
769	return 0;
770
771	#if HAVE_SENDFILE
772	# if __linux
773	res = sendfile (ofd, ifd, &offset, count);
774
775	# elif __freebsd
776	/*
777	* Of course, the freebsd sendfile is a dire hack with no thoughts
778	* wasted on making it similar to other I/O functions.
779	*/
780	{
781	off_t sbytes;
782	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
783
784	if (res < 0 && sbytes)
785	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
786	res = sbytes;
787	}	1044	};
788		1045
789	# elif __hpux	1046	aio_stash = gv_stashpv ("IO::AIO" , 1);
790	res = sendfile (ofd, ifd, offset, count, 0, 0);	1047	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1048	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1049	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
791		1050
792	# elif __solaris	1051	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
793	{	1052	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
794	struct sendfilevec vec;
795	size_t sbytes;
796		1053
797	vec.sfv_fd = ifd;	1054	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
798	vec.sfv_flag = 0;
799	vec.sfv_off = offset;
800	vec.sfv_len = count;
801		1055
802	res = sendfilev (ofd, &vec, 1, &sbytes);	1056	reinit ();
		1057	}
803		1058
804	if (res < 0 && sbytes)	1059	void
		1060	reinit ()
		1061	PROTOTYPE:
		1062
		1063	void
		1064	max_poll_reqs (unsigned int nreqs)
		1065	PROTOTYPE: $
		1066	CODE:
		1067	eio_set_max_poll_reqs (nreqs);
		1068
		1069	void
		1070	max_poll_time (double nseconds)
		1071	PROTOTYPE: $
		1072	CODE:
		1073	eio_set_max_poll_time (nseconds);
		1074
		1075	void
		1076	min_parallel (unsigned int nthreads)
		1077	PROTOTYPE: $
		1078	CODE:
		1079	eio_set_min_parallel (nthreads);
		1080
		1081	void
		1082	max_parallel (unsigned int nthreads)
		1083	PROTOTYPE: $
		1084	CODE:
		1085	eio_set_max_parallel (nthreads);
		1086
		1087	void
		1088	max_idle (unsigned int nthreads)
		1089	PROTOTYPE: $
		1090	CODE:
		1091	eio_set_max_idle (nthreads);
		1092
		1093	void
		1094	idle_timeout (unsigned int seconds)
		1095	PROTOTYPE: $
		1096	CODE:
		1097	eio_set_idle_timeout (seconds);
		1098
		1099	void
		1100	max_outstanding (unsigned int maxreqs)
		1101	PROTOTYPE: $
		1102	CODE:
		1103	max_outstanding = maxreqs;
		1104
		1105	void
		1106	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1107	PPCODE:
		1108	{
		1109	dREQ;
		1110
		1111	req->type = EIO_WD_OPEN;
		1112	req_set_path1 (req, pathname);
		1113
		1114	REQ_SEND;
		1115	}
		1116
		1117	void
		1118	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1119	PPCODE:
		1120	{
		1121	dREQ;
		1122
		1123	req->type = EIO_OPEN;
		1124	req_set_path1 (req, pathname);
		1125	req->int1 = flags;
		1126	req->int2 = mode;
		1127
		1128	REQ_SEND;
		1129	}
		1130
		1131	void
		1132	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1133	ALIAS:
		1134	aio_fsync = EIO_FSYNC
		1135	aio_fdatasync = EIO_FDATASYNC
		1136	aio_syncfs = EIO_SYNCFS
		1137	PPCODE:
		1138	{
		1139	int fd = s_fileno_croak (fh, 0);
		1140	dREQ;
		1141
		1142	req->type = ix;
		1143	req->sv1 = newSVsv (fh);
		1144	req->int1 = fd;
		1145
		1146	REQ_SEND;
		1147	}
		1148
		1149	void
		1150	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1151	PPCODE:
		1152	{
		1153	int fd = s_fileno_croak (fh, 0);
		1154	dREQ;
		1155
		1156	req->type = EIO_SYNC_FILE_RANGE;
		1157	req->sv1 = newSVsv (fh);
		1158	req->int1 = fd;
		1159	req->offs = offset;
805	res = sbytes;	1160	req->size = nbytes;
806	}	1161	req->int2 = flags;
807		1162
808	# endif	1163	REQ_SEND;
		1164	}
		1165
		1166	void
		1167	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1168	PPCODE:
		1169	{
		1170	int fd = s_fileno_croak (fh, 0);
		1171	dREQ;
		1172
		1173	req->type = EIO_FALLOCATE;
		1174	req->sv1 = newSVsv (fh);
		1175	req->int1 = fd;
		1176	req->int2 = mode;
		1177	req->offs = offset;
		1178	req->size = len;
		1179
		1180	REQ_SEND;
		1181	}
		1182
		1183	void
		1184	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1185	PPCODE:
		1186	{
		1187	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1188	int fd = s_fileno_croak (fh, 0);
		1189	dREQ;
		1190
		1191	if (expect_false (close_fd < 0))
		1192	{
		1193	int pipefd [2];
		1194
		1195	if (
		1196	#ifdef _WIN32
		1197	_pipe (pipefd, 1, _O_BINARY) < 0
809	#else	1198	#else
810	res = -1;	1199	pipe (pipefd) < 0
811	errno = ENOSYS;	1200	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
812	#endif	1201	#endif
813		1202	|| close (pipefd [1]) < 0
814	if (res < 0
815	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
816	#if __solaris
817	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
818	#endif
819	)
820	)
821	{
822	/* emulate sendfile. this is a major pain in the ass */
823	dBUF;
824
825	res = 0;
826
827	while (count)
828	{
829	ssize_t cnt;
830
831	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
832
833	if (cnt <= 0)
834	{	1203	)
835	if (cnt && !res) res = -1;	1204	abort (); /*D*/
836	break;
837	}
838		1205
839	cnt = write (ofd, aio_buf, cnt);	1206	close_fd = pipefd [0];
840
841	if (cnt <= 0)
842	{
843	if (cnt && !res) res = -1;
844	break;
845	}
846
847	offset += cnt;
848	res += cnt;
849	count -= cnt;
850	}
851	}
852
853	return res;
854	}
855
856	/* read a full directory */
857	static void scandir_ (aio_req req, worker *self)
858	{
859	DIR *dirp;
860	union
861	{
862	struct dirent d;
863	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
864	} *u;
865	struct dirent *entp;
866	char *name, *names;
867	int memlen = 4096;
868	int memofs = 0;
869	int res = 0;
870	int errorno;
871
872	LOCK (wrklock);
873	self->dirp = dirp = opendir (req->dataptr);
874	self->dbuf = u = malloc (sizeof (*u));
875	req->data2ptr = names = malloc (memlen);
876	UNLOCK (wrklock);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}	1207	}
909	}
910		1208
911	if (errno)	1209	req->type = EIO_DUP2;
912	res = -1;	1210	req->int1 = close_fd;
913		1211	req->sv2 = newSVsv (fh);
914	req->result = res;	1212	req->int2 = fd;
915	}
916		1213
917	/*****************************************************************************/	1214	REQ_SEND;
918
919	static void *aio_proc (void *thr_arg)
920	{
921	aio_req req;
922	int type;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}	1215	}
1010		1216
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}
1038
1039	static void atfork_child (void)
1040	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();
1066
1067	atfork_parent ();
1068	}
1069
1070	#define dREQ \
1071	aio_req req; \
1072	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
1074	\
1075	if (SvOK (callback) && !SvROK (callback)) \
1076	croak ("callback must be undef or of reference type"); \
1077	\
1078	Newz (0, req, 1, aio_cb); \
1079	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \
1081	\
1082	req->callback = newSVsv (callback); \
1083	req->pri = req_pri
1084
1085	#define REQ_SEND \
1086	req_send (req); \
1087	\
1088	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090
1091	MODULE = IO::AIO PACKAGE = IO::AIO
1092
1093	PROTOTYPES: ENABLE
1094
1095	BOOT:
1096	{
1097	HV *stash = gv_stashpv ("IO::AIO", 1);
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1101
1102	create_pipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1104	}
1105
1106	void	1217	void
1107	min_parallel (nthreads)	1218	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1108	int nthreads	1219	PPCODE:
1109	PROTOTYPE: $
1110
1111	void
1112	max_parallel (nthreads)
1113	int nthreads
1114	PROTOTYPE: $
1115
1116	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$
1123	PPCODE:
1124	{	1220	{
		1221	STRLEN svlen;
		1222	int fd = s_fileno_croak (fh, 0);
1125	dREQ;	1223	dREQ;
1126		1224
1127	req->type = REQ_OPEN;	1225	req->type = EIO_SEEK;
1128	req->data = newSVsv (pathname);	1226	req->sv1 = newSVsv (fh);
1129	req->dataptr = SvPVbyte_nolen (req->data);	1227	req->int1 = fd;
1130	req->fd = flags;	1228	req->offs = SvVAL64 (offset);
1131	req->mode = mode;	1229	req->int2 = whence;
1132		1230
1133	REQ_SEND;	1231	REQ_SEND;
1134	}	1232	}
1135		1233
1136	void	1234	void
1137	aio_close (fh,callback=&PL_sv_undef)	1235	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$
1141	ALIAS:	1236	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC
1145	PPCODE:
1146	{
1147	dREQ;
1148
1149	req->type = ix;
1150	req->fh = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152
1153	REQ_SEND (req);
1154	}
1155
1156	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:
1165	aio_read = REQ_READ	1237	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	1238	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$
1168	PPCODE:	1239	PPCODE:
1169	{	1240	{
1170	aio_req req;
1171	STRLEN svlen;	1241	STRLEN svlen;
		1242	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1172	char *svptr = SvPVbyte (data, svlen);	1243	char *svptr = SvPVbyte (data, svlen);
1173		1244	UV len = SvUV (length);
1174	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);
1176		1245
1177	if (dataoffset < 0)	1246	if (dataoffset < 0)
1178	dataoffset += svlen;	1247	dataoffset += svlen;
1179		1248
1180	if (dataoffset < 0 || dataoffset > svlen)	1249	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	1250	croak ("dataoffset outside of data scalar");
1182		1251
1183	if (ix == REQ_WRITE)	1252	if (ix == EIO_WRITE)
1184	{	1253	{
1185	/* write: check length and adjust. */	1254	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	1255	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	1256	len = svlen - dataoffset;
1188	}	1257	}
1189	else	1258	else
1190	{	1259	{
1191	/* read: grow scalar as necessary */	1260	/* read: check type and grow scalar as necessary */
		1261	SvUPGRADE (data, SVt_PV);
1192	svptr = SvGROW (data, length + dataoffset);	1262	svptr = SvGROW (data, len + dataoffset + 1);
1193	}	1263	}
1194
1195	if (length < 0)
1196	croak ("length must not be negative");
1197		1264
1198	{	1265	{
1199	dREQ;	1266	dREQ;
1200		1267
1201	req->type = ix;	1268	req->type = ix;
1202	req->fh = newSVsv (fh);	1269	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1270	req->int1 = fd;
1204	: IoOFP (sv_2io (fh)));	1271	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	1272	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	1273	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	1274	req->ptr2 = (char *)svptr + dataoffset;
		1275	req->stroffset = dataoffset;
1209		1276
1210	if (!SvREADONLY (data))	1277	if (!SvREADONLY (data))
1211	{	1278	{
1212	SvREADONLY_on (data);	1279	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	1280	req->flags |= FLAG_SV2_RO_OFF;
1214	}	1281	}
1215		1282
1216	REQ_SEND;	1283	REQ_SEND;
1217	}	1284	}
1218	}	1285	}
1219		1286
1220	void	1287	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1288	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1222	SV * out_fh	1289	ALIAS:
1223	SV * in_fh	1290	aio_readlink = EIO_READLINK
1224	UV in_offset	1291	aio_realpath = EIO_REALPATH
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$
1228	PPCODE:	1292	PPCODE:
1229	{	1293	{
		1294	dREQ;
		1295
		1296	req->type = ix;
		1297	req_set_path1 (req, pathname);
		1298
		1299	REQ_SEND;
		1300	}
		1301
		1302	void
		1303	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1304	PPCODE:
		1305	{
		1306	int ifd = s_fileno_croak (in_fh , 0);
		1307	int ofd = s_fileno_croak (out_fh, 1);
1230	dREQ;	1308	dREQ;
1231		1309
1232	req->type = REQ_SENDFILE;	1310	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	1311	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1312	req->int1 = ofd;
1235	req->fh2 = newSVsv (in_fh);	1313	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1314	req->int2 = ifd;
1237	req->offset = in_offset;	1315	req->offs = in_offset;
1238	req->length = length;	1316	req->size = length;
1239		1317
1240	REQ_SEND;	1318	REQ_SEND;
1241	}	1319	}
1242		1320
1243	void	1321	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1322	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$
1250	PPCODE:	1323	PPCODE:
1251	{	1324	{
		1325	int fd = s_fileno_croak (fh, 0);
1252	dREQ;	1326	dREQ;
1253		1327
1254	req->type = REQ_READAHEAD;	1328	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	1329	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1330	req->int1 = fd;
1257	req->offset = offset;	1331	req->offs = offset;
1258	req->length = length;	1332	req->size = length;
1259		1333
1260	REQ_SEND;	1334	REQ_SEND;
1261	}	1335	}
1262		1336
1263	void	1337	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	1338	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	1339	ALIAS:
1268	aio_stat = REQ_STAT	1340	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	1341	aio_lstat = EIO_LSTAT
		1342	aio_statvfs = EIO_STATVFS
1270	PPCODE:	1343	PPCODE:
1271	{	1344	{
1272	dREQ;	1345	dREQ;
1273		1346
1274	New (0, req->statdata, 1, Stat_t);	1347	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1275	if (!req->statdata)
1276	{
1277	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");
1279	}
1280
1281	if (SvPOK (fh_or_path))
1282	{
1283	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);
1286	}
1287	else
1288	{
1289	req->type = REQ_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}
1293		1348
1294	REQ_SEND;	1349	REQ_SEND;
1295	}	1350	}
1296		1351
		1352	UV
		1353	major (UV dev)
		1354	ALIAS:
		1355	minor = 1
		1356	CODE:
		1357	RETVAL = ix ? major (dev) : minor (dev);
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	UV
		1362	makedev (UV maj, UV min)
		1363	CODE:
		1364	RETVAL = makedev (maj, min);
		1365	OUTPUT:
		1366	RETVAL
		1367
1297	void	1368	void
		1369	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1375	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1376	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1377
		1378	REQ_SEND;
		1379	}
		1380
		1381	void
		1382	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1383	PPCODE:
		1384	{
		1385	dREQ;
		1386
		1387	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1388	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->int2 = mode;
		1400	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1401
		1402	REQ_SEND;
		1403	}
		1404
		1405	void
		1406	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1407	PPCODE:
		1408	{
		1409	dREQ;
		1410
		1411	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1412	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1413	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1414
		1415	REQ_SEND;
		1416	}
		1417
		1418	void
		1419	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	dREQ;
		1423
		1424	req->type = EIO_READDIR;
		1425	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1426
		1427	if (flags & EIO_READDIR_DENTS)
		1428	req->int1 |= EIO_READDIR_CUSTOM2;
		1429
		1430	req_set_path1 (req, pathname);
		1431
		1432	REQ_SEND;
		1433	}
		1434
		1435	void
		1436	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1437	PPCODE:
		1438	{
		1439	dREQ;
		1440
		1441	req->type = EIO_MKDIR;
		1442	req->int2 = mode;
		1443	req_set_path1 (req, pathname);
		1444
		1445	REQ_SEND;
		1446	}
		1447
		1448	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	1449	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	1450	ALIAS:
1302	aio_unlink = REQ_UNLINK	1451	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	1452	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	1453	aio_readdir = EIO_READDIR
1305	PPCODE:	1454	PPCODE:
1306	{	1455	{
1307	dREQ;	1456	dREQ;
1308		1457
1309	req->type = ix;	1458	req->type = ix;
1310	req->data = newSVsv (pathname);	1459	req_set_path1 (req, pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	1460
1312
1313	REQ_SEND;	1461	REQ_SEND;
1314	}	1462	}
1315		1463
1316	void	1464	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1465	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:	1466	ALIAS:
1322	aio_link = REQ_LINK	1467	aio_link = EIO_LINK
1323	aio_symlink = REQ_SYMLINK	1468	aio_symlink = EIO_SYMLINK
1324	aio_rename = REQ_RENAME	1469	aio_rename = EIO_RENAME
1325	PPCODE:	1470	PPCODE:
1326	{	1471	{
		1472	eio_wd wd2 = 0;
1327	dREQ;	1473	dREQ;
1328		1474
1329	req->type = ix;	1475	req->type = ix;
1330	req->fh = newSVsv (oldpath);	1476	req_set_path1 (req, oldpath);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	1477	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1332	req->data = newSVsv (newpath);	1478	req->int3 = (long)wd2;
1333	req->dataptr = SvPVbyte_nolen (req->data);
1334		1479
1335	REQ_SEND;	1480	REQ_SEND;
1336	}	1481	}
1337		1482
1338	void	1483	void
1339	aio_busy (delay,callback=&PL_sv_undef)	1484	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	1485	PPCODE:
1343	{	1486	{
1344	dREQ;	1487	dREQ;
1345		1488
1346	req->type = REQ_BUSY;	1489	req->type = EIO_MKNOD;
1347	req->fd = delay < 0. ? 0 : delay;	1490	req->int2 = (mode_t)mode;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1491	req->offs = dev;
1349		1492	req_set_path1 (req, pathname);
		1493
1350	REQ_SEND;	1494	REQ_SEND;
1351	}	1495	}
1352		1496
1353	void	1497	void
1354	aio_group (callback=&PL_sv_undef)	1498	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1355	SV * callback	1499	ALIAS:
1356	PROTOTYPE: ;$	1500	aio_mtouch = EIO_MTOUCH
		1501	aio_msync = EIO_MSYNC
1357	PPCODE:	1502	PPCODE:
1358	{	1503	{
		1504	STRLEN svlen;
		1505	char *svptr = SvPVbyte (data, svlen);
		1506	UV len = SvUV (length);
		1507
		1508	if (offset < 0)
		1509	offset += svlen;
		1510
		1511	if (offset < 0 || offset > svlen)
		1512	croak ("offset outside of scalar");
		1513
		1514	if (!SvOK (length) || len + offset > svlen)
		1515	len = svlen - offset;
		1516
		1517	{
		1518	dREQ;
		1519
		1520	req->type = ix;
		1521	req->sv2 = SvREFCNT_inc (data);
		1522	req->ptr2 = (char *)svptr + offset;
		1523	req->size = len;
		1524	req->int1 = flags;
		1525
		1526	REQ_SEND;
		1527	}
		1528	}
		1529
		1530	void
		1531	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1532	PPCODE:
		1533	{
		1534	STRLEN svlen;
		1535	char *svptr = SvPVbyte (data, svlen);
		1536	UV len = SvUV (length);
		1537
		1538	if (offset < 0)
		1539	offset += svlen;
		1540
		1541	if (offset < 0 || offset > svlen)
		1542	croak ("offset outside of scalar");
		1543
		1544	if (!SvOK (length) || len + offset > svlen)
		1545	len = svlen - offset;
		1546
		1547	{
		1548	dREQ;
		1549
		1550	req->type = EIO_MLOCK;
		1551	req->sv2 = SvREFCNT_inc (data);
		1552	req->ptr2 = (char *)svptr + offset;
		1553	req->size = len;
		1554
		1555	REQ_SEND;
		1556	}
		1557	}
		1558
		1559	void
		1560	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1561	PPCODE:
		1562	{
		1563	dREQ;
		1564
		1565	req->type = EIO_MLOCKALL;
		1566	req->int1 = flags;
		1567
		1568	REQ_SEND;
		1569	}
		1570
		1571	void
		1572	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1573	PPCODE:
		1574	{
1359	dREQ;	1575	dREQ;
1360		1576
		1577	req->type = EIO_BUSY;
		1578	req->nv1 = delay < 0. ? 0. : delay;
		1579
		1580	REQ_SEND;
		1581	}
		1582
		1583	void
		1584	aio_group (SV *callback=&PL_sv_undef)
		1585	PPCODE:
		1586	{
		1587	dREQ;
		1588
1361	req->type = REQ_GROUP;	1589	req->type = EIO_GROUP;
		1590
1362	req_send (req);	1591	req_submit (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1592	XPUSHs (req_sv (req, aio_grp_stash));
1365	}	1593	}
1366		1594
1367	void	1595	void
1368	aio_nop (callback=&PL_sv_undef)	1596	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback	1597	ALIAS:
		1598	aio_nop = EIO_NOP
		1599	aio_sync = EIO_SYNC
1370	PPCODE:	1600	PPCODE:
1371	{	1601	{
1372	dREQ;	1602	dREQ;
1373		1603
1374	req->type = REQ_NOP;	1604	req->type = ix;
1375		1605
1376	REQ_SEND;	1606	REQ_SEND;
1377	}	1607	}
1378		1608
1379	void	1609	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	1610	aioreq_pri (int pri = 0)
1381	CODE:	1611	CODE:
		1612	RETVAL = next_pri;
		1613	if (items > 0)
		1614	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	1615	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	1616	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	1617	next_pri = pri;
		1618	}
		1619	OUTPUT:
		1620	RETVAL
1385		1621
1386	void	1622	void
1387	aioreq_nice (int nice = 0)	1623	aioreq_nice (int nice = 0)
1388	CODE:	1624	CODE:
1389	nice = next_pri - nice;	1625	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	1626	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	1627	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	1628	next_pri = nice;
1393		1629
1394	void	1630	void
1395	flush ()	1631	flush ()
		1632	CODE:
		1633	while (eio_nreqs ())
		1634	{
		1635	poll_wait ();
		1636	poll_cb ();
		1637	}
		1638
		1639	int
		1640	poll ()
		1641	CODE:
		1642	poll_wait ();
		1643	RETVAL = poll_cb ();
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	int
		1648	poll_fileno ()
		1649	CODE:
		1650	RETVAL = s_epipe_fd (&respipe);
		1651	OUTPUT:
		1652	RETVAL
		1653
		1654	int
		1655	poll_cb (...)
1396	PROTOTYPE:	1656	PROTOTYPE:
1397	CODE:	1657	CODE:
1398	while (nreqs)
1399	{
1400	poll_wait ();
1401	poll_cb (0);	1658	RETVAL = poll_cb ();
1402	}
1403
1404	void
1405	poll()
1406	PROTOTYPE:
1407	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();
1411	poll_cb (0);
1412	}
1413
1414	int
1415	poll_fileno()
1416	PROTOTYPE:
1417	CODE:
1418	RETVAL = respipe [0];
1419	OUTPUT:	1659	OUTPUT:
1420	RETVAL	1660	RETVAL
1421		1661
		1662	void
		1663	poll_wait ()
		1664	CODE:
		1665	poll_wait ();
		1666
1422	int	1667	int
1423	poll_cb(...)	1668	nreqs ()
1424	PROTOTYPE:
1425	CODE:	1669	CODE:
1426	RETVAL = poll_cb (0);	1670	RETVAL = eio_nreqs ();
1427	OUTPUT:	1671	OUTPUT:
1428	RETVAL	1672	RETVAL
1429		1673
1430	int	1674	int
1431	poll_some(int max = 0)	1675	nready ()
1432	PROTOTYPE: $
1433	CODE:	1676	CODE:
1434	RETVAL = poll_cb (max);	1677	RETVAL = eio_nready ();
1435	OUTPUT:	1678	OUTPUT:
1436	RETVAL	1679	RETVAL
1437		1680
1438	void	1681	int
1439	poll_wait()	1682	npending ()
1440	PROTOTYPE:
1441	CODE:	1683	CODE:
1442	if (nreqs)	1684	RETVAL = eio_npending ();
1443	poll_wait ();
1444
1445	int
1446	nreqs()
1447	PROTOTYPE:
1448	CODE:
1449	RETVAL = nreqs;
1450	OUTPUT:	1685	OUTPUT:
1451	RETVAL	1686	RETVAL
1452		1687
		1688	int
		1689	nthreads ()
		1690	CODE:
		1691	RETVAL = eio_nthreads ();
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	int
		1696	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1697	CODE:
		1698	RETVAL = posix_fadvise (fh, offset, length, advice);
		1699	OUTPUT:
		1700	RETVAL
		1701
		1702	IV
		1703	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1704	CODE:
		1705	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1706	OUTPUT:
		1707	RETVAL
		1708
		1709	void
		1710	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1711	PPCODE:
		1712	sv_unmagic (scalar, MMAP_MAGIC);
		1713	{
		1714	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1715	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1716	if (addr == (void *)-1)
		1717	XSRETURN_NO;
		1718
		1719	sv_force_normal (scalar);
		1720
		1721	/* we store the length in mg_obj, as namlen is I32 :/ */
		1722	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1723	->mg_obj = (SV *)length;
		1724
		1725	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1726
		1727	if (!(prot & PROT_WRITE))
		1728	SvREADONLY_on (scalar);
		1729
		1730	if (SvLEN (scalar))
		1731	Safefree (SvPVX (scalar));
		1732
		1733	SvPVX (scalar) = (char *)addr;
		1734	SvCUR_set (scalar, length);
		1735	SvLEN_set (scalar, 0);
		1736	SvPOK_only (scalar);
		1737
		1738	XSRETURN_YES;
		1739	}
		1740
		1741	void
		1742	munmap (SV *scalar)
		1743	CODE:
		1744	sv_unmagic (scalar, MMAP_MAGIC);
		1745
		1746	int
		1747	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1748	ALIAS:
		1749	mprotect = 1
		1750	CODE:
		1751	{
		1752	STRLEN svlen;
		1753	void *addr = SvPVbyte (scalar, svlen);
		1754	size_t len = SvUV (length);
		1755
		1756	if (offset < 0)
		1757	offset += svlen;
		1758
		1759	if (offset < 0 || offset > svlen)
		1760	croak ("offset outside of scalar");
		1761
		1762	if (!SvOK (length) || len + offset > svlen)
		1763	len = svlen - offset;
		1764
		1765	addr = (void *)(((intptr_t)addr) + offset);
		1766	eio_page_align (&addr, &len);
		1767
		1768	switch (ix)
		1769	{
		1770	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1771	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1772	}
		1773	}
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	int
		1778	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1779	CODE:
		1780	{
		1781	STRLEN svlen;
		1782	void *addr = SvPVbyte (scalar, svlen);
		1783	size_t len = SvUV (length);
		1784
		1785	if (offset < 0)
		1786	offset += svlen;
		1787
		1788	if (offset < 0 || offset > svlen)
		1789	croak ("offset outside of scalar");
		1790
		1791	if (!SvOK (length) || len + offset > svlen)
		1792	len = svlen - offset;
		1793
		1794	addr = (void *)(((intptr_t)addr) + offset);
		1795	eio_page_align (&addr, &len);
		1796	#if _POSIX_MEMLOCK_RANGE
		1797	RETVAL = munlock (addr, len);
		1798	#else
		1799	RETVAL = ((errno = ENOSYS), -1);
		1800	#endif
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805	int
		1806	munlockall ()
		1807	CODE:
		1808	#if _POSIX_MEMLOCK
		1809	munlockall ();
		1810	#else
		1811	RETVAL = -1;
		1812	errno = ENOSYS;
		1813	#endif
		1814	OUTPUT:
		1815	RETVAL
		1816
		1817	void _on_next_submit (SV *cb)
		1818	CODE:
		1819	SvREFCNT_dec (on_next_submit);
		1820	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1821
1453	PROTOTYPES: DISABLE	1822	PROTOTYPES: DISABLE
		1823
		1824	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1825
		1826	BOOT:
		1827	{
		1828	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1829	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1830	}
		1831
		1832	void
		1833	DESTROY (SV *self)
		1834	CODE:
		1835	{
		1836	aio_wd wd = SvAIO_WD (self);
		1837	#if HAVE_AT
		1838	{
		1839	SV *callback = &PL_sv_undef;
		1840	dREQ; /* clobbers next_pri :/ */
		1841	next_pri = req->pri; /* restore next_pri */
		1842	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1843	req->type = EIO_WD_CLOSE;
		1844	req->wd = wd;
		1845	REQ_SEND;
		1846	}
		1847	#else
		1848	eio_wd_close_sync (wd);
		1849	#endif
		1850	}
1454		1851
1455	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1852	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1456		1853
1457	void	1854	void
1458	cancel (aio_req_ornot req)	1855	cancel (aio_req_ornot req)
1459	CODE:	1856	CODE:
1460	req_cancel (req);	1857	eio_cancel (req);
1461		1858
1462	void	1859	void
1463	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1860	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1464	CODE:	1861	PPCODE:
		1862	{
		1863	if (GIMME_V != G_VOID)
		1864	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1865
		1866	if (items > 1)
		1867	{
		1868	SV *cb_cv =get_cb (callback);
		1869
1465	SvREFCNT_dec (req->callback);	1870	SvREFCNT_dec (req->callback);
1466	req->callback = newSVsv (callback);	1871	req->callback = SvREFCNT_inc (cb_cv);
		1872	}
		1873	}
1467		1874
1468	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1875	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1469		1876
1470	void	1877	void
1471	add (aio_req grp, ...)	1878	add (aio_req grp, ...)
1472	PPCODE:	1879	PPCODE:
1473	{	1880	{
1474	int i;	1881	int i;
1475	aio_req req;
1476		1882
1477	if (grp->fd == 2)	1883	if (grp->int1 == 2)
1478	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1884	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1479		1885
1480	for (i = 1; i < items; ++i )	1886	for (i = 1; i < items; ++i )
1481	{	1887	{
		1888	aio_req req;
		1889
1482	if (GIMME_V != G_VOID)	1890	if (GIMME_V != G_VOID)
1483	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1891	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1484		1892
1485	req = SvAIO_REQ (ST (i));	1893	req = SvAIO_REQ (ST (i));
1486		1894
1487	if (req)	1895	if (req)
1488	{	1896	eio_grp_add (grp, req);
1489	++grp->length;
1490	req->grp = grp;
1491
1492	req->grp_prev = 0;
1493	req->grp_next = grp->grp_first;
1494
1495	if (grp->grp_first)
1496	grp->grp_first->grp_prev = req;
1497
1498	grp->grp_first = req;
1499	}
1500	}	1897	}
1501	}	1898	}
1502		1899
1503	void	1900	void
1504	cancel_subs (aio_req_ornot req)	1901	cancel_subs (aio_req_ornot req)
…		…
1508	void	1905	void
1509	result (aio_req grp, ...)	1906	result (aio_req grp, ...)
1510	CODE:	1907	CODE:
1511	{	1908	{
1512	int i;	1909	int i;
		1910	AV *av;
		1911
		1912	grp->errorno = errno;
		1913
1513	AV *av = newAV ();	1914	av = newAV ();
		1915	av_extend (av, items - 1);
1514		1916
1515	for (i = 1; i < items; ++i )	1917	for (i = 1; i < items; ++i )
1516	av_push (av, newSVsv (ST (i)));	1918	av_push (av, newSVsv (ST (i)));
1517		1919
1518	SvREFCNT_dec (grp->data);	1920	SvREFCNT_dec (grp->sv1);
1519	grp->data = (SV *)av;	1921	grp->sv1 = (SV *)av;
1520	}	1922	}
		1923
		1924	void
		1925	errno (aio_req grp, int errorno = errno)
		1926	CODE:
		1927	grp->errorno = errorno;
1521		1928
1522	void	1929	void
1523	limit (aio_req grp, int limit)	1930	limit (aio_req grp, int limit)
1524	CODE:	1931	CODE:
1525	grp->fd2 = limit;	1932	eio_grp_limit (grp, limit);
1526	aio_grp_feed (grp);
1527		1933
1528	void	1934	void
1529	feed (aio_req grp, SV *callback=&PL_sv_undef)	1935	feed (aio_req grp, SV *callback=&PL_sv_undef)
1530	CODE:	1936	CODE:
1531	{	1937	{
1532	SvREFCNT_dec (grp->fh2);	1938	SvREFCNT_dec (grp->sv2);
1533	grp->fh2 = newSVsv (callback);	1939	grp->sv2 = newSVsv (callback);
		1940	grp->feed = aio_grp_feed;
1534		1941
1535	if (grp->fd2 <= 0)	1942	if (grp->int2 <= 0)
1536	grp->fd2 = 2;	1943	grp->int2 = 2;
1537		1944
1538	aio_grp_feed (grp);	1945	eio_grp_limit (grp, grp->int2);
1539	}	1946	}
1540		1947

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