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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.82 by root, Fri Oct 27 20:11:58 2006 UTC vs.
Revision 1.203 by root, Thu Sep 29 23:06:24 2011 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	#else
		68
40	# include <sys/socket.h>	69	#include <sys/time.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
43	# else	295	# else
44	# error sendfile support requested but not available	296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	297	# endif
46	#endif	298	#endif
47		299	#ifndef MAP_HUGETLB
48	/* used for struct dirent, AIX doesn't provide it */	300	# define MAP_HUGETLB 0
49	#ifndef NAME_MAX
50	# define NAME_MAX 4096
51	#endif
52
53	#ifndef PTHREAD_STACK_MIN
54	/* care for broken platforms, e.g. windows */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
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
65
66	/* wether word reads are potentially non-atomic.
67	* this is conservatice, likely most arches this runs
68	* on have atomic word read/writes.
69	*/
70	#ifndef WORDREAD_UNSAFE
71	# if __i386 || __x86_64
72	# define WORDREAD_UNSAFE 0
73	# else
74	# define WORDREAD_UNSAFE 1
75	# endif	301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
76	#endif	304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
77		314
78	/* buffer size for various temporary buffers */	315	#ifndef makedev
79	#define AIO_BUFSIZE 65536	316	# define makedev(maj,min) (((maj) << 8) | (min))
		317	#endif
		318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
80		324
81	#define dBUF \	325	#ifndef PAGESIZE
82	char *aio_buf; \	326	# define PAGESIZE sysconf (_SC_PAGESIZE)
83	LOCK (wrklock); \	327	#endif
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
85	UNLOCK (wrklock); \
86	if (!aio_buf) \
87	return -1;
88		328
89	enum {	329	enum {
90	REQ_QUIT,	330	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_MKNOD, REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};	331	};
102		332
103	#define AIO_REQ_KLASS "IO::AIO::REQ"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"
105
106	typedef struct aio_cb
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;
111	SV *fh, *fh2;
112	void *dataptr, *data2ptr;
113	Stat_t *statdata;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117
118	STRLEN dataoffset;
119	int type;
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123
124	unsigned char flags;
125	unsigned char pri;
126
127	SV *self; /* the perl counterpart of this request, if any */
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
129	} aio_cb;
130
131	enum {
132	FLAG_CANCELLED = 0x01,
133	};
134
135	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd aio_wd;
137		336
138	enum {	337	static SV *on_next_submit;
139	PRI_MIN = -4,	338	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	339	static int max_outstanding;
141		340
142	DEFAULT_PRI = 0,	341	static s_epipe respipe;
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146		342
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150
151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153	#else
154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155	#endif
156
157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160	/* worker threads management */
161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163	typedef struct worker {
164	/* locked by wrklock */
165	struct worker *prev, *next;
166
167	pthread_t tid;
168
169	/* locked by reslock, reqlock or wrklock */
170	aio_req req; /* currently processed request */
171	void *dbuf;
172	DIR *dirp;
173	} worker;
174
175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177	static void worker_clear (worker *wrk)
178	{
179	if (wrk->dirp)
180	{
181	closedir (wrk->dirp);
182	wrk->dirp = 0;
183	}
184
185	if (wrk->dbuf)
186	{
187	free (wrk->dbuf);
188	wrk->dbuf = 0;
189	}
190	}
191
192	static void worker_free (worker *wrk)
193	{
194	wrk->next->prev = wrk->prev;
195	wrk->prev->next = wrk->next;
196
197	free (wrk);
198	}
199
200	static volatile unsigned int nreqs, nready, npending;
201	static volatile unsigned int max_outstanding = 0xffffffff;
202	static int respipe [2];
203
204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
207
208	#if WORDREAD_UNSAFE
209
210	static unsigned int get_nready ()
211	{
212	unsigned int retval;
213
214	LOCK (reqlock);
215	retval = nready;
216	UNLOCK (reqlock);
217
218	return retval;
219	}
220
221	static unsigned int get_npending ()
222	{
223	unsigned int retval;
224
225	LOCK (reslock);
226	retval = npending;
227	UNLOCK (reslock);
228
229	return retval;
230	}
231
232	#else
233
234	# define get_nready() nready
235	# define get_npending() npending
236
237	#endif
238
239	/*
240	* a somewhat faster data structure might be nice, but
241	* with 8 priorities this actually needs <20 insns
242	* per shift, the most expensive operation.
243	*/
244	typedef struct {
245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246	int size;
247	} reqq;
248
249	static reqq req_queue;
250	static reqq res_queue;
251
252	int reqq_push (reqq *q, aio_req req)
253	{
254	int pri = req->pri;
255	req->next = 0;
256
257	if (q->qe[pri])
258	{
259	q->qe[pri]->next = req;
260	q->qe[pri] = req;
261	}
262	else
263	q->qe[pri] = q->qs[pri] = req;
264
265	return q->size++;
266	}
267
268	aio_req reqq_shift (reqq *q)
269	{
270	int pri;
271
272	if (!q->size)
273	return 0;
274
275	--q->size;
276
277	for (pri = NUM_PRI; pri--; )
278	{
279	aio_req req = q->qs[pri];
280
281	if (req)
282	{
283	if (!(q->qs[pri] = req->next))
284	q->qe[pri] = 0;
285
286	return req;
287	}
288	}
289
290	abort ();
291	}
292
293	static int poll_cb (int max);
294	static void req_invoke (aio_req req);
295	static void req_free (aio_req req);	343	static void req_destroy (aio_req req);
296	static void req_cancel (aio_req req);	344	static void req_cancel (aio_req req);
297		345
		346	static void
		347	want_poll (void)
		348	{
		349	/* write a dummy byte to the pipe so fh becomes ready */
		350	s_epipe_signal (&respipe);
		351	}
		352
		353	static void
		354	done_poll (void)
		355	{
		356	/* read any signals sent by the worker threads */
		357	s_epipe_drain (&respipe);
		358	}
		359
298	/* must be called at most once */	360	/* must be called at most once */
299	static SV *req_sv (aio_req req, const char *klass)	361	static SV *
		362	req_sv (aio_req req, HV *stash)
300	{	363	{
301	if (!req->self)	364	if (!req->self)
302	{	365	{
303	req->self = (SV *)newHV ();	366	req->self = (SV *)newHV ();
304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	367	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305	}	368	}
306		369
307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	370	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
308	}	371	}
309		372
310	static aio_req SvAIO_REQ (SV *sv)	373	static SV *
		374	newSVaio_wd (aio_wd wd)
		375	{
		376	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		377	}
		378
		379	static aio_req
		380	SvAIO_REQ (SV *sv)
311	{	381	{
312	MAGIC *mg;	382	MAGIC *mg;
313		383
314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	384	if (!SvROK (sv)
		385	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		386	&& SvSTASH (SvRV (sv)) != aio_req_stash
		387	&& !sv_derived_from (sv, "IO::AIO::REQ")))
315	croak ("object of class " AIO_REQ_KLASS " expected");	388	croak ("object of class IO::AIO::REQ expected");
316		389
317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	390	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318		391
319	return mg ? (aio_req)mg->mg_ptr : 0;	392	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	393	}
321		394
		395	static aio_wd
		396	SvAIO_WD (SV *sv)
		397	{
		398	if (!SvROK (sv)
		399	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		400	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		401	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		402
		403	return (aio_wd)(long)SvIVX (SvRV (sv));
		404	}
		405
		406	static void
322	static void aio_grp_feed (aio_req grp)	407	aio_grp_feed (aio_req grp)
323	{	408	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	409	if (grp->sv2 && SvOK (grp->sv2))
325	{	410	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	411	dSP;
331		412
332	ENTER;	413	ENTER;
333	SAVETMPS;	414	SAVETMPS;
334	PUSHMARK (SP);	415	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	416	XPUSHs (req_sv (grp, aio_grp_stash));
336	PUTBACK;	417	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	418	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	419	SPAGAIN;
339	FREETMPS;	420	FREETMPS;
340	LEAVE;	421	LEAVE;
341	}
342
343	/* stop if no progress has been made */
344	if (old_len == grp->length)
345	{
346	SvREFCNT_dec (grp->fh2);
347	grp->fh2 = 0;
348	break;
349	}
350	}	422	}
351	}	423	}
352		424
353	static void aio_grp_dec (aio_req grp)	425	static void
		426	req_submit (eio_req *req)
354	{	427	{
355	--grp->length;	428	eio_submit (req);
356		429
357	/* call feeder, if applicable */	430	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	431	{
363	req_invoke (grp);	432	dSP;
364	req_free (grp);	433	SV *cb = sv_2mortal (on_next_submit);
		434
		435	on_next_submit = 0;
		436
		437	PUSHMARK (SP);
		438	PUTBACK;
		439	call_sv (cb, G_DISCARD | G_EVAL);
365	}	440	}
366	}	441	}
367		442
		443	static int
368	static void req_invoke (aio_req req)	444	req_invoke (eio_req *req)
369	{	445	{
370	dSP;	446	if (req->flags & FLAG_SV2_RO_OFF)
		447	SvREADONLY_off (req->sv2);
371		448
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	449	if (!EIO_CANCELLED (req) && req->callback)
373	{	450	{
		451	dSP;
		452	static SV *sv_result_cache; /* caches the result integer SV */
		453	SV *sv_result;
		454
374	ENTER;	455	ENTER;
375	SAVETMPS;	456	SAVETMPS;
376	PUSHMARK (SP);	457	PUSHMARK (SP);
377	EXTEND (SP, 1);	458	EXTEND (SP, 1);
378		459
		460	/* do not recreate the result IV from scratch each time */
		461	if (expect_true (sv_result_cache))
		462	{
		463	sv_result = sv_result_cache; sv_result_cache = 0;
		464	SvIV_set (sv_result, req->result);
		465	SvIOK_only (sv_result);
		466	}
		467	else
		468	{
		469	sv_result = newSViv (req->result);
		470	SvREADONLY_on (sv_result);
		471	}
		472
379	switch (req->type)	473	switch (req->type)
380	{	474	{
		475	case EIO_WD_OPEN:
		476	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		477	break;
		478
381	case REQ_READDIR:	479	case EIO_READDIR:
382	{	480	{
383	SV *rv = &PL_sv_undef;	481	SV *rv = &PL_sv_undef;
384		482
385	if (req->result >= 0)	483	if (req->result >= 0)
386	{	484	{
387	int i;	485	int i;
388	char *buf = req->data2ptr;	486	char *names = (char *)req->ptr2;
		487	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	488	AV *av = newAV ();
390		489
391	av_extend (av, req->result - 1);	490	av_extend (av, req->result - 1);
392		491
393	for (i = 0; i < req->result; ++i)	492	for (i = 0; i < req->result; ++i)
394	{	493	{
395	SV *sv = newSVpv (buf, 0);	494	if (req->int1 & EIO_READDIR_DENTS)
		495	{
		496	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		497
		498	if (req->int1 & EIO_READDIR_CUSTOM2)
		499	{
		500	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		501	AV *avent = newAV ();
		502
		503	av_extend (avent, 2);
		504
		505	if (!sv_type [ent->type])
		506	{
		507	sv_type [ent->type] = newSViv (ent->type);
		508	SvREADONLY_on (sv_type [ent->type]);
		509	}
		510
		511	av_store (avent, 0, namesv);
		512	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		513	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		514
		515	av_store (av, i, newRV_noinc ((SV *)avent));
		516	}
		517	else
397	av_store (av, i, sv);	518	av_store (av, i, namesv);
		519
		520	++ent;
		521	}
		522	else
		523	{
		524	SV *name = newSVpv (names, 0);
		525	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	526	names += SvCUR (name) + 1;
		527	}
399	}	528	}
400		529
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	530	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	531	}
403		532
404	PUSHs (rv);	533	PUSHs (rv);
		534
		535	if (req->int1 & EIO_READDIR_CUSTOM1)
		536	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	537	}
406	break;	538	break;
407		539
408	case REQ_OPEN:	540	case EIO_OPEN:
409	{	541	{
410	/* convert fd to fh */	542	/* convert fd to fh */
411	SV *fh;	543	SV *fh = &PL_sv_undef;
412		544
413	PUSHs (sv_2mortal (newSViv (req->result)));	545	if (req->result >= 0)
414	PUTBACK;	546	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	547	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	548	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		549	char sym [64];
		550	int symlen;
		551
		552	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		553	gv_init (gv, aio_stash, sym, symlen, 0);
417		554
418	fh = SvREFCNT_inc (POPs);	555	symlen = snprintf (
		556	sym,
		557	sizeof (sym),
		558	"%s&=%d",
		559	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		560	(int)req->result
		561	);
419		562
		563	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		564	fh = (SV *)gv;
		565	}
		566
420	PUSHMARK (SP);	567	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	568	}
423	break;	569	break;
424		570
		571	case EIO_STATVFS:
		572	case EIO_FSTATVFS:
		573	{
		574	SV *rv = &PL_sv_undef;
		575
		576	#ifndef _WIN32
		577	if (req->result >= 0)
		578	{
		579	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		580	HV *hv = newHV ();
		581
		582	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		583
		584	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		585	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		586	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		587	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		588	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		589	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		590	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		591	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		592	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		593	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		594	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		595	}
		596	#endif
		597
		598	PUSHs (rv);
		599	}
		600
		601	break;
		602
425	case REQ_GROUP:	603	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	604	req->int1 = 2; /* mark group as finished */
427		605
428	if (req->data)	606	if (req->sv1)
429	{	607	{
430	int i;	608	int i;
431	AV *av = (AV *)req->data;	609	AV *av = (AV *)req->sv1;
432		610
433	EXTEND (SP, AvFILL (av) + 1);	611	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	612	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	613	PUSHs (*av_fetch (av, i, 0));
436	}	614	}
437	break;	615	break;
438		616
439	case REQ_NOP:	617	case EIO_NOP:
440	case REQ_BUSY:	618	case EIO_BUSY:
441	break;	619	break;
442		620
		621	case EIO_READLINK:
		622	case EIO_REALPATH:
		623	if (req->result > 0)
		624	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		625	break;
		626
		627	case EIO_STAT:
		628	case EIO_LSTAT:
		629	case EIO_FSTAT:
		630	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		631
		632	if (!(PL_laststatval = req->result))
		633	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		634	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		635
		636	PUSHs (sv_result);
		637	break;
		638
		639	case EIO_READ:
		640	{
		641	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		642	*SvEND (req->sv2) = 0;
		643	SvPOK_only (req->sv2);
		644	SvSETMAGIC (req->sv2);
		645	PUSHs (sv_result);
		646	}
		647	break;
		648
		649	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		650	if (req->result > 0)
		651	SvIV_set (sv_result, 0);
		652	/* FALLTHROUGH */
		653
443	default:	654	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	655	PUSHs (sv_result);
445	break;	656	break;
446	}	657	}
447		658
448	errno = req->errorno;	659	errno = req->errorno;
449		660
450	PUTBACK;	661	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	662	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	663	SPAGAIN;
		664
		665	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		666	SvREFCNT_dec (sv_result);
		667	else
		668	sv_result_cache = sv_result;
453		669
454	FREETMPS;	670	FREETMPS;
455	LEAVE;	671	LEAVE;
		672
		673	PUTBACK;
456	}	674	}
457		675
458	if (req->grp)	676	return !!SvTRUE (ERRSV);
459	{
460	aio_req grp = req->grp;
461
462	/* unlink request */
463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466	if (grp->grp_first == req)
467	grp->grp_first = req->grp_next;
468
469	aio_grp_dec (grp);
470	}
471
472	if (SvTRUE (ERRSV))
473	{
474	req_free (req);
475	croak (0);
476	}
477	}	677	}
478		678
479	static void req_free (aio_req req)	679	static void
		680	req_destroy (aio_req req)
480	{	681	{
481	if (req->self)	682	if (req->self)
482	{	683	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	684	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	685	SvREFCNT_dec (req->self);
485	}	686	}
486		687
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	688	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	689	SvREFCNT_dec (req->sv2);
		690	SvREFCNT_dec (req->sv3);
		691	SvREFCNT_dec (req->sv4);
490	SvREFCNT_dec (req->callback);	692	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495		693
496	Safefree (req);	694	Safefree (req);
497	}	695	}
498		696
		697	static void
499	static void req_cancel_subs (aio_req grp)	698	req_cancel_subs (aio_req grp)
500	{	699	{
501	aio_req sub;
502
503	if (grp->type != REQ_GROUP)	700	if (grp->type != EIO_GROUP)
504	return;	701	return;
505		702
506	SvREFCNT_dec (grp->fh2);	703	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	704	grp->sv2 = 0;
508		705
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	706	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	707	}
512		708
513	static void req_cancel (aio_req req)	709	static void ecb_cold
		710	create_respipe (void)
514	{	711	{
515	req->flags |= FLAG_CANCELLED;	712	if (s_epipe_renew (&respipe))
516		713	croak ("IO::AIO: unable to initialize result pipe");
517	req_cancel_subs (req);
518	}	714	}
519		715
520	static void *aio_proc(void *arg);	716	static void
521		717	poll_wait (void)
522	static void start_thread (void)
523	{	718	{
524	sigset_t fullsigset, oldsigset;
525	pthread_attr_t attr;
526
527	worker *wrk = calloc (1, sizeof (worker));
528
529	if (!wrk)
530	croak ("unable to allocate worker thread data");
531
532	pthread_attr_init (&attr);
533	pthread_attr_setstacksize (&attr, STACKSIZE);
534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535	#ifdef PTHREAD_SCOPE_PROCESS
536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537	#endif
538
539	sigfillset (&fullsigset);
540
541	LOCK (wrklock);
542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
543
544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545	{
546	wrk->prev = &wrk_first;
547	wrk->next = wrk_first.next;
548	wrk_first.next->prev = wrk;
549	wrk_first.next = wrk;
550	++started;
551	}
552	else
553	free (wrk);
554
555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
556	UNLOCK (wrklock);
557	}
558
559	static void maybe_start_thread ()
560	{
561	#if 0
562	static struct timeval last;
563	struct timeval diff, now;
564	#endif
565
566	if (started >= wanted)
567	return;
568
569	if (nready <= nreqs - get_nready () - get_npending ())
570	return;
571
572	#if 0
573	gettimeofday (&now, 0);
574
575	diff.tv_sec = now.tv_sec - last.tv_sec;
576	diff.tv_usec = now.tv_usec - last.tv_usec;
577
578	if (diff.tv_usec < 0)
579	{
580	--diff.tv_sec;
581	diff.tv_usec += 1000000;
582	}
583
584	if (!diff.tv_sec && diff.tv_usec < 10000)
585	return;
586
587	last = now;
588	#endif
589
590	start_thread ();
591	}
592
593	static void req_send (aio_req req)
594	{
595	++nreqs;
596
597	LOCK (reqlock);
598	++nready;
599	reqq_push (&req_queue, req);
600	pthread_cond_signal (&reqwait);
601	UNLOCK (reqlock);
602
603	maybe_start_thread ();
604	}
605
606	static void end_thread (void)
607	{
608	aio_req req;
609
610	Newz (0, req, 1, aio_cb);
611
612	req->type = REQ_QUIT;
613	req->pri = PRI_MAX + PRI_BIAS;
614
615	req_send (req);
616
617	LOCK (wrklock);
618	--started;
619	UNLOCK (wrklock);
620	}
621
622	static void min_parallel (int nthreads)
623	{
624	if (wanted < nthreads)
625	wanted = nthreads;
626	}
627
628	static void max_parallel (int nthreads)
629	{
630	if (wanted > nthreads)
631	wanted = nthreads;
632
633	while (started > wanted)
634	end_thread ();
635	}
636
637	static void poll_wait ()
638	{
639	fd_set rfd;
640
641	while (nreqs)	719	while (eio_nreqs ())
642	{	720	{
643	int size;	721	int size;
644	if (WORDREAD_UNSAFE) LOCK (reslock);	722
		723	X_LOCK (reslock);
645	size = res_queue.size;	724	size = res_queue.size;
646	if (WORDREAD_UNSAFE) UNLOCK (reslock);	725	X_UNLOCK (reslock);
647		726
648	if (size)	727	if (size)
649	return;	728	return;
650		729
651	maybe_start_thread ();	730	etp_maybe_start_thread ();
652		731
653	FD_ZERO(&rfd);	732	s_epipe_wait (&respipe);
654	FD_SET(respipe [0], &rfd);
655
656	select (respipe [0] + 1, &rfd, 0, 0, 0);
657	}	733	}
658	}	734	}
659		735
660	static int poll_cb (int max)	736	static int
		737	poll_cb (void)
661	{	738	{
662	dSP;
663	int count = 0;
664	int do_croak = 0;
665	aio_req req;
666
667	for (;;)	739	for (;;)
668	{	740	{
669	while (max <= 0 || count < max)	741	int res = eio_poll ();
670	{
671	maybe_start_thread ();
672		742
673	LOCK (reslock);	743	if (res > 0)
674	req = reqq_shift (&res_queue);
675
676	if (req)
677	{
678	--npending;
679
680	if (!res_queue.size)
681	{
682	/* read any signals sent by the worker threads */
683	char buf [32];
684	while (read (respipe [0], buf, 32) == 32)
685	;
686	}
687	}
688
689	UNLOCK (reslock);
690
691	if (!req)
692	break;
693
694	--nreqs;
695
696	if (req->type == REQ_GROUP && req->length)
697	{
698	req->fd = 1; /* mark request as delayed */
699	continue;
700	}
701	else
702	{
703	if (req->type == REQ_READ)
704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
705
706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
707	SvREADONLY_off (req->data);
708
709	if (req->statdata)
710	{
711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
712	PL_laststatval = req->result;
713	PL_statcache = *(req->statdata);
714	}
715
716	req_invoke (req);
717
718	count++;
719	}
720
721	req_free (req);
722	}
723
724	if (nreqs <= max_outstanding)
725	break;	744	croak (0);
		745
		746	if (!max_outstanding || max_outstanding > eio_nreqs ())
		747	return res;
726		748
727	poll_wait ();	749	poll_wait ();
728
729	max = 0;
730	}	750	}
731
732	return count;
733	}	751	}
734		752
735	static void create_pipe ()	753	static void ecb_cold
		754	reinit (void)
736	{	755	{
737	if (pipe (respipe))	756	create_respipe ();
738	croak ("unable to initialize result pipe");
739		757
740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	758	if (eio_init (want_poll, done_poll) < 0)
741	croak ("cannot set result pipe to nonblocking mode");	759	croak ("IO::AIO: unable to initialise eio library");
742
743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
744	croak ("cannot set result pipe to nonblocking mode");
745	}	760	}
746		761
747	/*****************************************************************************/	762	/*****************************************************************************/
748	/* work around various missing functions */
749		763
750	#if !HAVE_PREADWRITE	764	#if !_POSIX_MAPPED_FILES
751	# define pread aio_pread	765	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
752	# define pwrite aio_pwrite	766	# define munmap(addr,length) (errno = ENOSYS, -1)
753
754	/*
755	* make our pread/pwrite safe against themselves, but not against
756	* normal read/write by using a mutex. slows down execution a lot,
757	* but that's your problem, not mine.
758	*/
759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
760
761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = read (fd, buf, count);
770	lseek (fd, ooffset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775
776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
777	{
778	ssize_t res;
779	off_t ooffset;
780
781	LOCK (preadwritelock);
782	ooffset = lseek (fd, 0, SEEK_CUR);
783	lseek (fd, offset, SEEK_SET);
784	res = write (fd, buf, count);
785	lseek (fd, offset, SEEK_SET);
786	UNLOCK (preadwritelock);
787
788	return res;
789	}
790	#endif
791
792	#if !HAVE_FDATASYNC
793	# define fdatasync fsync
794	#endif
795
796	#if !HAVE_READAHEAD
797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
798
799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
800	{
801	dBUF;
802
803	while (count > 0)
804	{
805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
806
807	pread (fd, aio_buf, len, offset);
808	offset += len;
809	count -= len;
810	}
811
812	errno = 0;
813	}
814
815	#endif
816
817	#if !HAVE_READDIR_R
818	# define readdir_r aio_readdir_r
819
820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
821
822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
823	{
824	struct dirent *e;
825	int errorno;
826
827	LOCK (readdirlock);
828
829	e = readdir (dirp);
830	errorno = errno;
831
832	if (e)
833	{
834	*res = ent;
835	strcpy (ent->d_name, e->d_name);
836	}
837	else
838	*res = 0;
839
840	UNLOCK (readdirlock);
841
842	errno = errorno;
843	return e ? 0 : -1;
844	}
845	#endif
846
847	/* sendfile always needs emulation */
848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
849	{
850	ssize_t res;
851
852	if (!count)
853	return 0;
854
855	#if HAVE_SENDFILE
856	# if __linux
857	res = sendfile (ofd, ifd, &offset, count);
858
859	# elif __freebsd
860	/*
861	* Of course, the freebsd sendfile is a dire hack with no thoughts
862	* wasted on making it similar to other I/O functions.
863	*/
864	{
865	off_t sbytes;
866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
867
868	if (res < 0 && sbytes)
869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870	res = sbytes;
871	}
872
873	# elif __hpux
874	res = sendfile (ofd, ifd, offset, count, 0, 0);
875
876	# elif __solaris
877	{
878	struct sendfilevec vec;
879	size_t sbytes;
880
881	vec.sfv_fd = ifd;
882	vec.sfv_flag = 0;
883	vec.sfv_off = offset;
884	vec.sfv_len = count;
885
886	res = sendfilev (ofd, &vec, 1, &sbytes);
887
888	if (res < 0 && sbytes)
889	res = sbytes;
890	}
891
892	# endif	767	#endif
893	#else
894	res = -1;
895	errno = ENOSYS;
896	#endif
897		768
898	if (res < 0	769	#if !_POSIX_MEMORY_PROTECTION
899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	770	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
900	#if __solaris	771	# define PROT_NONE 0
901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	772	# define PROT_WRITE 0
		773	# define MAP_PRIVATE 0
		774	# define MAP_SHARED 0
		775	# define MAP_FIXED 0
902	#endif	776	#endif
903	)
904	)
905	{
906	/* emulate sendfile. this is a major pain in the ass */
907	dBUF;
908		777
909	res = 0;	778	#define MMAP_MAGIC PERL_MAGIC_ext
910		779
911	while (count)	780	static int ecb_cold
912	{	781	mmap_free (pTHX_ SV *sv, MAGIC *mg)
913	ssize_t cnt;	782	{
914		783	int old_errno = errno;
915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);	784	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		785	errno = old_errno;
916		786
917	if (cnt <= 0)	787	mg->mg_obj = 0; /* just in case */
918	{
919	if (cnt && !res) res = -1;
920	break;
921	}
922		788
923	cnt = write (ofd, aio_buf, cnt);	789	SvREADONLY_off (sv);
924		790
925	if (cnt <= 0)	791	if (SvPVX (sv) != mg->mg_ptr)
926	{	792	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
927	if (cnt && !res) res = -1;
928	break;
929	}
930		793
931	offset += cnt;	794	SvCUR_set (sv, 0);
932	res += cnt;	795	SvPVX (sv) = 0;
933	count -= cnt;	796	SvOK_off (sv);
934	}
935	}
936		797
937	return res;	798	return 0;
938	}	799	}
939		800
940	/* read a full directory */	801	static MGVTBL mmap_vtbl = {
941	static void scandir_ (aio_req req, worker *self)	802	0, 0, 0, 0, mmap_free
942	{	803	};
943	DIR *dirp;
944	union
945	{
946	struct dirent d;
947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
948	} *u;
949	struct dirent *entp;
950	char *name, *names;
951	int memlen = 4096;
952	int memofs = 0;
953	int res = 0;
954	int errorno;
955
956	LOCK (wrklock);
957	self->dirp = dirp = opendir (req->dataptr);
958	self->dbuf = u = malloc (sizeof (*u));
959	req->data2ptr = names = malloc (memlen);
960	UNLOCK (wrklock);
961
962	if (dirp && u && names)
963	for (;;)
964	{
965	errno = 0;
966	readdir_r (dirp, &u->d, &entp);
967
968	if (!entp)
969	break;
970
971	name = entp->d_name;
972
973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
974	{
975	int len = strlen (name) + 1;
976
977	res++;
978
979	while (memofs + len > memlen)
980	{
981	memlen *= 2;
982	LOCK (wrklock);
983	req->data2ptr = names = realloc (names, memlen);
984	UNLOCK (wrklock);
985
986	if (!names)
987	break;
988	}
989
990	memcpy (names + memofs, name, len);
991	memofs += len;
992	}
993	}
994
995	if (errno)
996	res = -1;
997
998	req->result = res;
999	}
1000		804
1001	/*****************************************************************************/	805	/*****************************************************************************/
1002		806
1003	static void *aio_proc (void *thr_arg)	807	static SV *
		808	get_cb (SV *cb_sv)
1004	{	809	{
		810	SvGETMAGIC (cb_sv);
		811	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		812	}
		813
		814	static aio_req ecb_noinline
		815	dreq (SV *callback)
		816	{
		817	SV *cb_cv;
1005	aio_req req;	818	aio_req req;
1006	worker *self = (worker *)thr_arg;	819	int req_pri = next_pri;
		820	next_pri = EIO_PRI_DEFAULT;
1007		821
1008	for (;;)	822	cb_cv = get_cb (callback);
1009	{
1010	LOCK (reqlock);
1011		823
1012	for (;;)	824	Newz (0, req, 1, eio_req);
1013	{	825	if (!req)
1014	self->req = req = reqq_shift (&req_queue);	826	croak ("out of memory during eio_req allocation");
1015		827
1016	if (req)	828	req->callback = SvREFCNT_inc (cb_cv);
1017	break;	829	req->pri = req_pri;
1018		830
1019	pthread_cond_wait (&reqwait, &reqlock);	831	return req;
1020	}
1021
1022	--nready;
1023
1024	UNLOCK (reqlock);
1025
1026	errno = 0; /* strictly unnecessary */
1027
1028	if (!(req->flags & FLAG_CANCELLED))
1029	switch (req->type)
1030	{
1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1033
1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1036
1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1040
1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1042	case REQ_CLOSE: req->result = close (req->fd); break;
1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1049
1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
1052	case REQ_READDIR: scandir_ (req, self); break;
1053
1054	case REQ_BUSY:
1055	{
1056	struct timeval tv;
1057
1058	tv.tv_sec = req->fd;
1059	tv.tv_usec = req->fd2;
1060
1061	req->result = select (0, 0, 0, 0, &tv);
1062	}
1063
1064	case REQ_GROUP:
1065	case REQ_NOP:
1066	break;
1067
1068	case REQ_QUIT:
1069	LOCK (wrklock);
1070	worker_free (self);
1071	--started;
1072	UNLOCK (wrklock);
1073	return 0;
1074
1075	default:
1076	req->result = ENOSYS;
1077	break;
1078	}
1079
1080	req->errorno = errno;
1081
1082	LOCK (reslock);
1083
1084	++npending;
1085
1086	if (!reqq_push (&res_queue, req))
1087	/* write a dummy byte to the pipe so fh becomes ready */
1088	write (respipe [1], &respipe, 1);
1089
1090	self->req = 0;
1091	worker_clear (self);
1092
1093	UNLOCK (reslock);
1094	}
1095	}
1096
1097	/*****************************************************************************/
1098
1099	static void atfork_prepare (void)
1100	{
1101	LOCK (wrklock);
1102	LOCK (reqlock);
1103	LOCK (reslock);
1104	#if !HAVE_PREADWRITE
1105	LOCK (preadwritelock);
1106	#endif
1107	#if !HAVE_READDIR_R
1108	LOCK (readdirlock);
1109	#endif
1110	}
1111
1112	static void atfork_parent (void)
1113	{
1114	#if !HAVE_READDIR_R
1115	UNLOCK (readdirlock);
1116	#endif
1117	#if !HAVE_PREADWRITE
1118	UNLOCK (preadwritelock);
1119	#endif
1120	UNLOCK (reslock);
1121	UNLOCK (reqlock);
1122	UNLOCK (wrklock);
1123	}
1124
1125	static void atfork_child (void)
1126	{
1127	aio_req prv;
1128
1129	while (prv = reqq_shift (&req_queue))
1130	req_free (prv);
1131
1132	while (prv = reqq_shift (&res_queue))
1133	req_free (prv);
1134
1135	while (wrk_first.next != &wrk_first)
1136	{
1137	worker *wrk = wrk_first.next;
1138
1139	if (wrk->req)
1140	req_free (wrk->req);
1141
1142	worker_clear (wrk);
1143	worker_free (wrk);
1144	}
1145
1146	started = 0;
1147	nreqs = 0;
1148
1149	close (respipe [0]);
1150	close (respipe [1]);
1151	create_pipe ();
1152
1153	atfork_parent ();
1154	}	832	}
1155		833
1156	#define dREQ \	834	#define dREQ \
1157	aio_req req; \	835	aio_req req = dreq (callback); \
1158	int req_pri = next_pri; \
1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
1160	\
1161	if (SvOK (callback) && !SvROK (callback)) \
1162	croak ("callback must be undef or of reference type"); \
1163	\
1164	Newz (0, req, 1, aio_cb); \
1165	if (!req) \
1166	croak ("out of memory during aio_req allocation"); \
1167	\
1168	req->callback = newSVsv (callback); \
1169	req->pri = req_pri
1170		836
1171	#define REQ_SEND \	837	#define REQ_SEND \
		838	PUTBACK; \
1172	req_send (req); \	839	req_submit (req); \
		840	SPAGAIN; \
1173	\	841	\
1174	if (GIMME_V != G_VOID) \	842	if (GIMME_V != G_VOID) \
1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));	843	XPUSHs (req_sv (req, aio_req_stash));
1176		844
		845	ecb_inline void
		846	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		847	{
		848	if (expect_false (SvROK (path)))
		849	{
		850	AV *av = (AV *)SvRV (path);
		851	SV *wdob;
		852
		853	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		854	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		855
		856	path = AvARRAY (av)[1];
		857	wdob = AvARRAY (av)[0];
		858
		859	if (SvOK (wdob))
		860	{
		861	*wd = SvAIO_WD (wdob);
		862	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		863	}
		864	else
		865	*wd = EIO_INVALID_WD;
		866	}
		867
		868	*pathsv = newSVsv (path);
		869	*ptr = SvPVbyte_nolen (*pathsv);
		870	}
		871
		872	static void ecb_noinline
		873	req_set_path1 (aio_req req, SV *path)
		874	{
		875	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		876	}
		877
		878	static void ecb_noinline
		879	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		880	{
		881	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		882
		883	switch (SvTYPE (rv))
		884	{
		885	case SVt_PVIO:
		886	case SVt_PVLV:
		887	case SVt_PVGV:
		888	req->type = type_fh;
		889	req->sv1 = newSVsv (fh_or_path);
		890	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		891	break;
		892
		893	default:
		894	req->type = type_path;
		895	req_set_path1 (req, fh_or_path);
		896	break;
		897	}
		898	}
		899
		900	XS(boot_IO__AIO) ecb_cold;
		901
1177	MODULE = IO::AIO PACKAGE = IO::AIO	902	MODULE = IO::AIO PACKAGE = IO::AIO
1178		903
1179	PROTOTYPES: ENABLE	904	PROTOTYPES: ENABLE
1180		905
1181	BOOT:	906	BOOT:
1182	{	907	{
		908	static const struct {
		909	const char *name;
		910	IV iv;
		911	} *civ, const_iv[] = {
		912	# define const_niv(name, value) { # name, (IV) value },
		913	# define const_iv(name) { # name, (IV) name },
		914	# define const_eio(name) { # name, (IV) EIO_ ## name },
		915	const_iv (EXDEV)
		916	const_iv (ENOSYS)
		917	const_iv (O_RDONLY)
		918	const_iv (O_WRONLY)
		919	const_iv (O_RDWR)
		920	const_iv (O_CREAT)
		921	const_iv (O_TRUNC)
		922	const_iv (O_EXCL)
		923	const_iv (O_APPEND)
		924
		925	const_iv (O_ASYNC)
		926	const_iv (O_DIRECT)
		927	const_iv (O_NOATIME)
		928
		929	const_iv (O_CLOEXEC)
		930	const_iv (O_NOCTTY)
		931	const_iv (O_NOFOLLOW)
		932	const_iv (O_NONBLOCK)
		933	const_iv (O_EXEC)
		934	const_iv (O_SEARCH)
		935	const_iv (O_DIRECTORY)
		936	const_iv (O_DSYNC)
		937	const_iv (O_RSYNC)
		938	const_iv (O_SYNC)
		939	const_iv (O_TTY_INIT)
		940
		941	const_iv (S_IFIFO)
		942	const_iv (S_IFCHR)
		943	const_iv (S_IFBLK)
		944	const_iv (S_IFLNK)
		945	const_iv (S_IFREG)
		946	const_iv (S_IFDIR)
		947	const_iv (S_IFWHT)
		948	const_iv (S_IFSOCK)
		949	const_iv (S_IFMT)
		950
		951	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		952	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		953	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		954	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		955	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		956	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		957
		958	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		959	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		960	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		961	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		962	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		963
		964	const_iv (ST_RDONLY)
		965	const_iv (ST_NOSUID)
		966	const_iv (ST_NODEV)
		967	const_iv (ST_NOEXEC)
		968	const_iv (ST_SYNCHRONOUS)
		969	const_iv (ST_MANDLOCK)
		970	const_iv (ST_WRITE)
		971	const_iv (ST_APPEND)
		972	const_iv (ST_IMMUTABLE)
		973	const_iv (ST_NOATIME)
		974	const_iv (ST_NODIRATIME)
		975	const_iv (ST_RELATIME)
		976
		977	const_iv (PROT_NONE)
		978	const_iv (PROT_EXEC)
		979	const_iv (PROT_READ)
		980	const_iv (PROT_WRITE)
		981
		982	/*const_iv (MAP_FIXED)*/
		983	const_iv (MAP_PRIVATE)
		984	const_iv (MAP_SHARED)
		985	const_iv (MAP_ANONYMOUS)
		986
		987	/* linuxish */
		988	const_iv (MAP_HUGETLB)
		989	const_iv (MAP_LOCKED)
		990	const_iv (MAP_NORESERVE)
		991	const_iv (MAP_POPULATE)
		992	const_iv (MAP_NONBLOCK)
		993
		994	const_eio (MCL_FUTURE)
		995	const_eio (MCL_CURRENT)
		996
		997	const_eio (MS_ASYNC)
		998	const_eio (MS_INVALIDATE)
		999	const_eio (MS_SYNC)
		1000
		1001	const_eio (MT_MODIFY)
		1002
		1003	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1004	const_eio (SYNC_FILE_RANGE_WRITE)
		1005	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1006
		1007	const_eio (FALLOC_FL_KEEP_SIZE)
		1008
		1009	const_eio (READDIR_DENTS)
		1010	const_eio (READDIR_DIRS_FIRST)
		1011	const_eio (READDIR_STAT_ORDER)
		1012	const_eio (READDIR_FOUND_UNKNOWN)
		1013
		1014	const_eio (DT_UNKNOWN)
		1015	const_eio (DT_FIFO)
		1016	const_eio (DT_CHR)
		1017	const_eio (DT_DIR)
		1018	const_eio (DT_BLK)
		1019	const_eio (DT_REG)
		1020	const_eio (DT_LNK)
		1021	const_eio (DT_SOCK)
		1022	const_eio (DT_WHT)
		1023	};
		1024
1183	HV *stash = gv_stashpv ("IO::AIO", 1);	1025	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1026	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1027	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1028	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1184		1029
1185	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1030	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1186	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1031	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1187	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1188	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1189	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1190	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1191		1032
1192	create_pipe ();	1033	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1193	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1194		1034
1195	start_thread ();	1035	reinit ();
1196	}	1036	}
1197		1037
1198	void	1038	void
1199	min_parallel (int nthreads)	1039	reinit ()
1200	PROTOTYPE: $	1040	PROTOTYPE:
1201		1041
1202	void	1042	void
1203	max_parallel (int nthreads)	1043	max_poll_reqs (unsigned int nreqs)
1204	PROTOTYPE: $
1205
1206	int
1207	max_outstanding (int maxreqs)
1208	PROTOTYPE: $	1044	PROTOTYPE: $
1209	CODE:	1045	CODE:
1210	RETVAL = max_outstanding;	1046	eio_set_max_poll_reqs (nreqs);
		1047
		1048	void
		1049	max_poll_time (double nseconds)
		1050	PROTOTYPE: $
		1051	CODE:
		1052	eio_set_max_poll_time (nseconds);
		1053
		1054	void
		1055	min_parallel (unsigned int nthreads)
		1056	PROTOTYPE: $
		1057	CODE:
		1058	eio_set_min_parallel (nthreads);
		1059
		1060	void
		1061	max_parallel (unsigned int nthreads)
		1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_max_parallel (nthreads);
		1065
		1066	void
		1067	max_idle (unsigned int nthreads)
		1068	PROTOTYPE: $
		1069	CODE:
		1070	eio_set_max_idle (nthreads);
		1071
		1072	void
		1073	idle_timeout (unsigned int seconds)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_idle_timeout (seconds);
		1077
		1078	void
		1079	max_outstanding (unsigned int maxreqs)
		1080	PROTOTYPE: $
		1081	CODE:
1211	max_outstanding = maxreqs;	1082	max_outstanding = maxreqs;
1212	OUTPUT:
1213	RETVAL
1214		1083
1215	void	1084	void
1216	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1085	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1217	SV * pathname
1218	int flags
1219	int mode
1220	SV * callback
1221	PROTOTYPE: $$$;$
1222	PPCODE:	1086	PPCODE:
1223	{	1087	{
1224	dREQ;	1088	dREQ;
1225		1089
1226	req->type = REQ_OPEN;	1090	req->type = EIO_WD_OPEN;
1227	req->data = newSVsv (pathname);	1091	req_set_path1 (req, pathname);
1228	req->dataptr = SvPVbyte_nolen (req->data);
1229	req->fd = flags;
1230	req->mode = mode;
1231		1092
1232	REQ_SEND;	1093	REQ_SEND;
1233	}	1094	}
1234		1095
1235	void	1096	void
		1097	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1098	PPCODE:
		1099	{
		1100	dREQ;
		1101
		1102	req->type = EIO_OPEN;
		1103	req_set_path1 (req, pathname);
		1104	req->int1 = flags;
		1105	req->int2 = mode;
		1106
		1107	REQ_SEND;
		1108	}
		1109
		1110	void
1236	aio_close (fh,callback=&PL_sv_undef)	1111	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1237	SV * fh
1238	SV * callback
1239	PROTOTYPE: $;$
1240	ALIAS:	1112	ALIAS:
1241	aio_close = REQ_CLOSE
1242	aio_fsync = REQ_FSYNC	1113	aio_fsync = EIO_FSYNC
1243	aio_fdatasync = REQ_FDATASYNC	1114	aio_fdatasync = EIO_FDATASYNC
		1115	aio_syncfs = EIO_SYNCFS
1244	PPCODE:	1116	PPCODE:
1245	{	1117	{
		1118	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	1119	dREQ;
1247		1120
1248	req->type = ix;	1121	req->type = ix;
1249	req->fh = newSVsv (fh);	1122	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1123	req->int1 = fd;
1251		1124
1252	REQ_SEND (req);	1125	REQ_SEND (req);
1253	}	1126	}
1254		1127
1255	void	1128	void
		1129	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1130	PPCODE:
		1131	{
		1132	int fd = s_fileno_croak (fh, 0);
		1133	dREQ;
		1134
		1135	req->type = EIO_SYNC_FILE_RANGE;
		1136	req->sv1 = newSVsv (fh);
		1137	req->int1 = fd;
		1138	req->offs = offset;
		1139	req->size = nbytes;
		1140	req->int2 = flags;
		1141
		1142	REQ_SEND (req);
		1143	}
		1144
		1145	void
		1146	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1147	PPCODE:
		1148	{
		1149	int fd = s_fileno_croak (fh, 0);
		1150	dREQ;
		1151
		1152	req->type = EIO_FALLOCATE;
		1153	req->sv1 = newSVsv (fh);
		1154	req->int1 = fd;
		1155	req->int2 = mode;
		1156	req->offs = offset;
		1157	req->size = len;
		1158
		1159	REQ_SEND (req);
		1160	}
		1161
		1162	void
		1163	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1167	int fd = s_fileno_croak (fh, 0);
		1168	dREQ;
		1169
		1170	if (expect_false (close_fd < 0))
		1171	{
		1172	int pipefd [2];
		1173
		1174	if (
		1175	#ifdef _WIN32
		1176	_pipe (pipefd, 1, _O_BINARY) < 0
		1177	#else
		1178	pipe (pipefd) < 0
		1179	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1180	#endif
		1181	|| close (pipefd [1]) < 0
		1182	)
		1183	abort (); /*D*/
		1184
		1185	close_fd = pipefd [0];
		1186	}
		1187
		1188	req->type = EIO_DUP2;
		1189	req->int1 = close_fd;
		1190	req->sv2 = newSVsv (fh);
		1191	req->int2 = fd;
		1192
		1193	REQ_SEND (req);
		1194	}
		1195
		1196	void
1256	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1197	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1257	SV * fh
1258	UV offset
1259	UV length
1260	SV * data
1261	UV dataoffset
1262	SV * callback
1263	ALIAS:	1198	ALIAS:
1264	aio_read = REQ_READ	1199	aio_read = EIO_READ
1265	aio_write = REQ_WRITE	1200	aio_write = EIO_WRITE
1266	PROTOTYPE: $$$$$;$
1267	PPCODE:	1201	PPCODE:
1268	{	1202	{
1269	aio_req req;
1270	STRLEN svlen;	1203	STRLEN svlen;
		1204	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1271	char *svptr = SvPVbyte (data, svlen);	1205	char *svptr = SvPVbyte (data, svlen);
1272		1206	UV len = SvUV (length);
1273	SvUPGRADE (data, SVt_PV);
1274	SvPOK_on (data);
1275		1207
1276	if (dataoffset < 0)	1208	if (dataoffset < 0)
1277	dataoffset += svlen;	1209	dataoffset += svlen;
1278		1210
1279	if (dataoffset < 0 || dataoffset > svlen)	1211	if (dataoffset < 0 || dataoffset > svlen)
1280	croak ("data offset outside of string");	1212	croak ("dataoffset outside of data scalar");
1281		1213
1282	if (ix == REQ_WRITE)	1214	if (ix == EIO_WRITE)
1283	{	1215	{
1284	/* write: check length and adjust. */	1216	/* write: check length and adjust. */
1285	if (length < 0 || length + dataoffset > svlen)	1217	if (!SvOK (length) || len + dataoffset > svlen)
1286	length = svlen - dataoffset;	1218	len = svlen - dataoffset;
1287	}	1219	}
1288	else	1220	else
1289	{	1221	{
1290	/* read: grow scalar as necessary */	1222	/* read: check type and grow scalar as necessary */
		1223	SvUPGRADE (data, SVt_PV);
1291	svptr = SvGROW (data, length + dataoffset);	1224	svptr = SvGROW (data, len + dataoffset + 1);
1292	}	1225	}
1293
1294	if (length < 0)
1295	croak ("length must not be negative");
1296		1226
1297	{	1227	{
1298	dREQ;	1228	dREQ;
1299		1229
1300	req->type = ix;	1230	req->type = ix;
1301	req->fh = newSVsv (fh);	1231	req->sv1 = newSVsv (fh);
1302	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1232	req->int1 = fd;
1303	: IoOFP (sv_2io (fh)));	1233	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1304	req->offset = offset;	1234	req->size = len;
1305	req->length = length;
1306	req->data = SvREFCNT_inc (data);	1235	req->sv2 = SvREFCNT_inc (data);
1307	req->dataptr = (char *)svptr + dataoffset;	1236	req->ptr2 = (char *)svptr + dataoffset;
		1237	req->stroffset = dataoffset;
1308		1238
1309	if (!SvREADONLY (data))	1239	if (!SvREADONLY (data))
1310	{	1240	{
1311	SvREADONLY_on (data);	1241	SvREADONLY_on (data);
1312	req->data2ptr = (void *)data;	1242	req->flags |= FLAG_SV2_RO_OFF;
1313	}	1243	}
1314		1244
1315	REQ_SEND;	1245	REQ_SEND;
1316	}	1246	}
1317	}	1247	}
1318		1248
1319	void	1249	void
1320	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1250	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1321	SV * out_fh	1251	ALIAS:
1322	SV * in_fh	1252	aio_readlink = EIO_READLINK
1323	UV in_offset	1253	aio_realpath = EIO_REALPATH
1324	UV length
1325	SV * callback
1326	PROTOTYPE: $$$$;$
1327	PPCODE:	1254	PPCODE:
1328	{	1255	{
		1256	dREQ;
		1257
		1258	req->type = ix;
		1259	req_set_path1 (req, pathname);
		1260
		1261	REQ_SEND;
		1262	}
		1263
		1264	void
		1265	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1266	PPCODE:
		1267	{
		1268	int ifd = s_fileno_croak (in_fh , 0);
		1269	int ofd = s_fileno_croak (out_fh, 1);
1329	dREQ;	1270	dREQ;
1330		1271
1331	req->type = REQ_SENDFILE;	1272	req->type = EIO_SENDFILE;
1332	req->fh = newSVsv (out_fh);	1273	req->sv1 = newSVsv (out_fh);
1333	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1274	req->int1 = ofd;
1334	req->fh2 = newSVsv (in_fh);	1275	req->sv2 = newSVsv (in_fh);
1335	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1276	req->int2 = ifd;
1336	req->offset = in_offset;	1277	req->offs = in_offset;
1337	req->length = length;	1278	req->size = length;
1338		1279
1339	REQ_SEND;	1280	REQ_SEND;
1340	}	1281	}
1341		1282
1342	void	1283	void
1343	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1284	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1344	SV * fh
1345	UV offset
1346	IV length
1347	SV * callback
1348	PROTOTYPE: $$$;$
1349	PPCODE:	1285	PPCODE:
1350	{	1286	{
		1287	int fd = s_fileno_croak (fh, 0);
1351	dREQ;	1288	dREQ;
1352		1289
1353	req->type = REQ_READAHEAD;	1290	req->type = EIO_READAHEAD;
1354	req->fh = newSVsv (fh);	1291	req->sv1 = newSVsv (fh);
1355	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1292	req->int1 = fd;
1356	req->offset = offset;	1293	req->offs = offset;
1357	req->length = length;	1294	req->size = length;
1358		1295
1359	REQ_SEND;	1296	REQ_SEND;
1360	}	1297	}
1361		1298
1362	void	1299	void
1363	aio_stat (fh_or_path,callback=&PL_sv_undef)	1300	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1364	SV * fh_or_path
1365	SV * callback
1366	ALIAS:	1301	ALIAS:
1367	aio_stat = REQ_STAT	1302	aio_stat = EIO_STAT
1368	aio_lstat = REQ_LSTAT	1303	aio_lstat = EIO_LSTAT
		1304	aio_statvfs = EIO_STATVFS
1369	PPCODE:	1305	PPCODE:
1370	{	1306	{
1371	dREQ;	1307	dREQ;
1372		1308
1373	New (0, req->statdata, 1, Stat_t);	1309	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1374	if (!req->statdata)
1375	{
1376	req_free (req);
1377	croak ("out of memory during aio_req->statdata allocation");
1378	}
1379
1380	if (SvPOK (fh_or_path))
1381	{
1382	req->type = ix;
1383	req->data = newSVsv (fh_or_path);
1384	req->dataptr = SvPVbyte_nolen (req->data);
1385	}
1386	else
1387	{
1388	req->type = REQ_FSTAT;
1389	req->fh = newSVsv (fh_or_path);
1390	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1391	}
1392		1310
1393	REQ_SEND;	1311	REQ_SEND;
1394	}	1312	}
1395		1313
		1314	UV
		1315	major (UV dev)
		1316	ALIAS:
		1317	minor = 1
		1318	CODE:
		1319	RETVAL = ix ? major (dev) : minor (dev);
		1320	OUTPUT:
		1321	RETVAL
		1322
		1323	UV
		1324	makedev (UV maj, UV min)
		1325	CODE:
		1326	RETVAL = makedev (maj, min);
		1327	OUTPUT:
		1328	RETVAL
		1329
1396	void	1330	void
		1331	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1332	PPCODE:
		1333	{
		1334	dREQ;
		1335
		1336	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1337	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1338	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1339
		1340	REQ_SEND;
		1341	}
		1342
		1343	void
		1344	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1345	PPCODE:
		1346	{
		1347	dREQ;
		1348
		1349	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1350	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1351
		1352	REQ_SEND;
		1353	}
		1354
		1355	void
		1356	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->int2 = mode;
		1362	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1363
		1364	REQ_SEND;
		1365	}
		1366
		1367	void
		1368	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1369	PPCODE:
		1370	{
		1371	dREQ;
		1372
		1373	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1374	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1375	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->type = EIO_READDIR;
		1387	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1388
		1389	if (flags & EIO_READDIR_DENTS)
		1390	req->int1 |= EIO_READDIR_CUSTOM2;
		1391
		1392	req_set_path1 (req, pathname);
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1399	PPCODE:
		1400	{
		1401	dREQ;
		1402
		1403	req->type = EIO_MKDIR;
		1404	req->int2 = mode;
		1405	req_set_path1 (req, pathname);
		1406
		1407	REQ_SEND;
		1408	}
		1409
		1410	void
1397	aio_unlink (pathname,callback=&PL_sv_undef)	1411	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1398	SV * pathname
1399	SV * callback
1400	ALIAS:	1412	ALIAS:
1401	aio_unlink = REQ_UNLINK	1413	aio_unlink = EIO_UNLINK
1402	aio_rmdir = REQ_RMDIR	1414	aio_rmdir = EIO_RMDIR
1403	aio_readdir = REQ_READDIR	1415	aio_readdir = EIO_READDIR
1404	PPCODE:	1416	PPCODE:
1405	{	1417	{
1406	dREQ;	1418	dREQ;
1407		1419
1408	req->type = ix;	1420	req->type = ix;
1409	req->data = newSVsv (pathname);	1421	req_set_path1 (req, pathname);
1410	req->dataptr = SvPVbyte_nolen (req->data);	1422
		1423	REQ_SEND;
		1424	}
		1425
		1426	void
		1427	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1428	ALIAS:
		1429	aio_link = EIO_LINK
		1430	aio_symlink = EIO_SYMLINK
		1431	aio_rename = EIO_RENAME
		1432	PPCODE:
		1433	{
		1434	dREQ;
		1435	eio_wd wd2 = 0;
		1436
		1437	req->type = ix;
		1438	req_set_path1 (req, oldpath);
		1439	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1440	req->int3 = (long)wd2;
1411		1441
1412	REQ_SEND;	1442	REQ_SEND;
1413	}	1443	}
1414		1444
1415	void	1445	void
1416	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1446	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1417	SV * oldpath
1418	SV * newpath
1419	SV * callback
1420	ALIAS:
1421	aio_link = REQ_LINK
1422	aio_symlink = REQ_SYMLINK
1423	aio_rename = REQ_RENAME
1424	PPCODE:	1447	PPCODE:
1425	{	1448	{
1426	dREQ;	1449	dREQ;
1427		1450
1428	req->type = ix;	1451	req->type = EIO_MKNOD;
1429	req->fh = newSVsv (oldpath);	1452	req->int2 = (mode_t)mode;
1430	req->data2ptr = SvPVbyte_nolen (req->fh);	1453	req->offs = dev;
1431	req->data = newSVsv (newpath);	1454	req_set_path1 (req, pathname);
1432	req->dataptr = SvPVbyte_nolen (req->data);
1433		1455
1434	REQ_SEND;	1456	REQ_SEND;
1435	}	1457	}
1436		1458
1437	void	1459	void
1438	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1460	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1439	SV * pathname	1461	ALIAS:
1440	SV * callback	1462	aio_mtouch = EIO_MTOUCH
1441	UV mode	1463	aio_msync = EIO_MSYNC
1442	UV dev	1464	PPCODE:
		1465	{
		1466	STRLEN svlen;
		1467	char *svptr = SvPVbyte (data, svlen);
		1468	UV len = SvUV (length);
		1469
		1470	if (offset < 0)
		1471	offset += svlen;
		1472
		1473	if (offset < 0 || offset > svlen)
		1474	croak ("offset outside of scalar");
		1475
		1476	if (!SvOK (length) || len + offset > svlen)
		1477	len = svlen - offset;
		1478
		1479	{
		1480	dREQ;
		1481
		1482	req->type = ix;
		1483	req->sv2 = SvREFCNT_inc (data);
		1484	req->ptr2 = (char *)svptr + offset;
		1485	req->size = len;
		1486	req->int1 = flags;
		1487
		1488	REQ_SEND;
		1489	}
		1490	}
		1491
		1492	void
		1493	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1494	PPCODE:
		1495	{
		1496	STRLEN svlen;
		1497	char *svptr = SvPVbyte (data, svlen);
		1498	UV len = SvUV (length);
		1499
		1500	if (offset < 0)
		1501	offset += svlen;
		1502
		1503	if (offset < 0 || offset > svlen)
		1504	croak ("offset outside of scalar");
		1505
		1506	if (!SvOK (length) || len + offset > svlen)
		1507	len = svlen - offset;
		1508
		1509	{
		1510	dREQ;
		1511
		1512	req->type = EIO_MLOCK;
		1513	req->sv2 = SvREFCNT_inc (data);
		1514	req->ptr2 = (char *)svptr + offset;
		1515	req->size = len;
		1516
		1517	REQ_SEND;
		1518	}
		1519	}
		1520
		1521	void
		1522	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1523	PPCODE:
		1524	{
		1525	dREQ;
		1526
		1527	req->type = EIO_MLOCKALL;
		1528	req->int1 = flags;
		1529
		1530	REQ_SEND;
		1531	}
		1532
		1533	void
		1534	aio_busy (double delay, SV *callback=&PL_sv_undef)
1443	PPCODE:	1535	PPCODE:
1444	{	1536	{
1445	dREQ;	1537	dREQ;
1446		1538
1447	req->type = REQ_MKNOD;	1539	req->type = EIO_BUSY;
1448	req->data = newSVsv (pathname);	1540	req->nv1 = delay < 0. ? 0. : delay;
1449	req->dataptr = SvPVbyte_nolen (req->data);	1541
1450	req->mode = (mode_t)mode;
1451	req->offset = dev;
1452
1453	REQ_SEND;	1542	REQ_SEND;
1454	}	1543	}
1455		1544
1456	void	1545	void
1457	aio_busy (delay,callback=&PL_sv_undef)	1546	aio_group (SV *callback=&PL_sv_undef)
1458	double delay	1547	PPCODE:
1459	SV * callback	1548	{
		1549	dREQ;
		1550
		1551	req->type = EIO_GROUP;
		1552
		1553	req_submit (req);
		1554	XPUSHs (req_sv (req, aio_grp_stash));
		1555	}
		1556
		1557	void
		1558	aio_nop (SV *callback=&PL_sv_undef)
		1559	ALIAS:
		1560	aio_nop = EIO_NOP
		1561	aio_sync = EIO_SYNC
1460	PPCODE:	1562	PPCODE:
1461	{	1563	{
1462	dREQ;	1564	dREQ;
1463		1565
1464	req->type = REQ_BUSY;
1465	req->fd = delay < 0. ? 0 : delay;
1466	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1467
1468	REQ_SEND;
1469	}
1470
1471	void
1472	aio_group (callback=&PL_sv_undef)
1473	SV * callback
1474	PROTOTYPE: ;$
1475	PPCODE:
1476	{
1477	dREQ;
1478
1479	req->type = REQ_GROUP;
1480	req_send (req);
1481
1482	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1483	}
1484
1485	void
1486	aio_nop (callback=&PL_sv_undef)
1487	SV * callback
1488	PPCODE:
1489	{
1490	dREQ;
1491
1492	req->type = REQ_NOP;	1566	req->type = ix;
1493		1567
1494	REQ_SEND;	1568	REQ_SEND;
1495	}	1569	}
1496		1570
1497	int	1571	int
1498	aioreq_pri (int pri = 0)	1572	aioreq_pri (int pri = 0)
1499	PROTOTYPE: ;$
1500	CODE:	1573	CODE:
1501	RETVAL = next_pri - PRI_BIAS;	1574	RETVAL = next_pri;
1502	if (items > 0)	1575	if (items > 0)
1503	{	1576	{
1504	if (pri < PRI_MIN) pri = PRI_MIN;	1577	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1505	if (pri > PRI_MAX) pri = PRI_MAX;	1578	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1506	next_pri = pri + PRI_BIAS;	1579	next_pri = pri;
1507	}	1580	}
1508	OUTPUT:	1581	OUTPUT:
1509	RETVAL	1582	RETVAL
1510		1583
1511	void	1584	void
1512	aioreq_nice (int nice = 0)	1585	aioreq_nice (int nice = 0)
1513	CODE:	1586	CODE:
1514	nice = next_pri - nice;	1587	nice = next_pri - nice;
1515	if (nice < PRI_MIN) nice = PRI_MIN;	1588	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1516	if (nice > PRI_MAX) nice = PRI_MAX;	1589	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1517	next_pri = nice + PRI_BIAS;	1590	next_pri = nice;
1518		1591
1519	void	1592	void
1520	flush ()	1593	flush ()
		1594	CODE:
		1595	while (eio_nreqs ())
		1596	{
		1597	poll_wait ();
		1598	poll_cb ();
		1599	}
		1600
		1601	int
		1602	poll ()
		1603	CODE:
		1604	poll_wait ();
		1605	RETVAL = poll_cb ();
		1606	OUTPUT:
		1607	RETVAL
		1608
		1609	int
		1610	poll_fileno ()
		1611	CODE:
		1612	RETVAL = s_epipe_fd (&respipe);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
		1617	poll_cb (...)
1521	PROTOTYPE:	1618	PROTOTYPE:
1522	CODE:	1619	CODE:
1523	while (nreqs)
1524	{
1525	poll_wait ();
1526	poll_cb (0);	1620	RETVAL = poll_cb ();
1527	}
1528
1529	void
1530	poll()
1531	PROTOTYPE:
1532	CODE:
1533	if (nreqs)
1534	{
1535	poll_wait ();
1536	poll_cb (0);
1537	}
1538
1539	int
1540	poll_fileno()
1541	PROTOTYPE:
1542	CODE:
1543	RETVAL = respipe [0];
1544	OUTPUT:	1621	OUTPUT:
1545	RETVAL	1622	RETVAL
1546		1623
		1624	void
		1625	poll_wait ()
		1626	CODE:
		1627	poll_wait ();
		1628
1547	int	1629	int
1548	poll_cb(...)	1630	nreqs ()
1549	PROTOTYPE:
1550	CODE:	1631	CODE:
1551	RETVAL = poll_cb (0);	1632	RETVAL = eio_nreqs ();
1552	OUTPUT:	1633	OUTPUT:
1553	RETVAL	1634	RETVAL
1554		1635
1555	int	1636	int
1556	poll_some(int max = 0)	1637	nready ()
1557	PROTOTYPE: $
1558	CODE:	1638	CODE:
1559	RETVAL = poll_cb (max);	1639	RETVAL = eio_nready ();
1560	OUTPUT:	1640	OUTPUT:
1561	RETVAL	1641	RETVAL
1562		1642
1563	void	1643	int
1564	poll_wait()	1644	npending ()
1565	PROTOTYPE:
1566	CODE:	1645	CODE:
1567	if (nreqs)	1646	RETVAL = eio_npending ();
1568	poll_wait ();
1569
1570	int
1571	nreqs()
1572	PROTOTYPE:
1573	CODE:
1574	RETVAL = nreqs;
1575	OUTPUT:	1647	OUTPUT:
1576	RETVAL	1648	RETVAL
1577		1649
1578	int	1650	int
1579	nready()	1651	nthreads ()
1580	PROTOTYPE:
1581	CODE:	1652	CODE:
1582	RETVAL = get_nready ();	1653	RETVAL = eio_nthreads ();
1583	OUTPUT:	1654	OUTPUT:
1584	RETVAL	1655	RETVAL
1585		1656
1586	int	1657	int
1587	npending()	1658	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1588	PROTOTYPE:	1659	CODE:
		1660	RETVAL = posix_fadvise (fh, offset, length, advice);
		1661	OUTPUT:
		1662	RETVAL
		1663
		1664	IV
		1665	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1666	CODE:
		1667	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	void
		1672	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1673	PPCODE:
		1674	sv_unmagic (scalar, MMAP_MAGIC);
		1675	{
		1676	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1677	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1678	if (addr == (void *)-1)
		1679	XSRETURN_NO;
		1680
		1681	sv_force_normal (scalar);
		1682
		1683	/* we store the length in mg_obj, as namlen is I32 :/ */
		1684	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1685	->mg_obj = (SV *)length;
		1686
		1687	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1688
		1689	if (!(prot & PROT_WRITE))
		1690	SvREADONLY_on (scalar);
		1691
		1692	if (SvLEN (scalar))
		1693	Safefree (SvPVX (scalar));
		1694
		1695	SvPVX (scalar) = (char *)addr;
		1696	SvCUR_set (scalar, length);
		1697	SvLEN_set (scalar, 0);
		1698	SvPOK_only (scalar);
		1699
		1700	XSRETURN_YES;
		1701	}
		1702
		1703	void
		1704	munmap (SV *scalar)
1589	CODE:	1705	CODE:
1590	RETVAL = get_npending ();	1706	sv_unmagic (scalar, MMAP_MAGIC);
		1707
		1708	int
		1709	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1710	ALIAS:
		1711	mprotect = 1
		1712	CODE:
		1713	{
		1714	STRLEN svlen;
		1715	void *addr = SvPVbyte (scalar, svlen);
		1716	size_t len = SvUV (length);
		1717
		1718	if (offset < 0)
		1719	offset += svlen;
		1720
		1721	if (offset < 0 || offset > svlen)
		1722	croak ("offset outside of scalar");
		1723
		1724	if (!SvOK (length) || len + offset > svlen)
		1725	len = svlen - offset;
		1726
		1727	addr = (void *)(((intptr_t)addr) + offset);
		1728	eio_page_align (&addr, &len);
		1729
		1730	switch (ix)
		1731	{
		1732	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1733	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1734	}
		1735	}
1591	OUTPUT:	1736	OUTPUT:
1592	RETVAL	1737	RETVAL
		1738
		1739	int
		1740	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1741	CODE:
		1742	{
		1743	STRLEN svlen;
		1744	void *addr = SvPVbyte (scalar, svlen);
		1745	size_t len = SvUV (length);
		1746
		1747	if (offset < 0)
		1748	offset += svlen;
		1749
		1750	if (offset < 0 || offset > svlen)
		1751	croak ("offset outside of scalar");
		1752
		1753	if (!SvOK (length) || len + offset > svlen)
		1754	len = svlen - offset;
		1755
		1756	addr = (void *)(((intptr_t)addr) + offset);
		1757	eio_page_align (&addr, &len);
		1758	#if _POSIX_MEMLOCK_RANGE
		1759	RETVAL = munlock (addr, len);
		1760	#else
		1761	RETVAL = ((errno = ENOSYS), -1);
		1762	#endif
		1763	}
		1764	OUTPUT:
		1765	RETVAL
		1766
		1767	int
		1768	munlockall ()
		1769	CODE:
		1770	#if _POSIX_MEMLOCK
		1771	munlockall ();
		1772	#else
		1773	RETVAL = -1;
		1774	errno = ENOSYS;
		1775	#endif
		1776	OUTPUT:
		1777	RETVAL
		1778
		1779	void _on_next_submit (SV *cb)
		1780	CODE:
		1781	SvREFCNT_dec (on_next_submit);
		1782	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1593		1783
1594	PROTOTYPES: DISABLE	1784	PROTOTYPES: DISABLE
		1785
		1786	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1787
		1788	BOOT:
		1789	{
		1790	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1791	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1792	}
		1793
		1794	void
		1795	DESTROY (SV *self)
		1796	CODE:
		1797	{
		1798	aio_wd wd = SvAIO_WD (self);
		1799	#if HAVE_AT
		1800	{
		1801	SV *callback = &PL_sv_undef;
		1802	dREQ; /* clobbers next_pri :/ */
		1803	next_pri = req->pri; /* restore next_pri */
		1804	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1805	req->type = EIO_WD_CLOSE;
		1806	req->wd = wd;
		1807	REQ_SEND;
		1808	}
		1809	#else
		1810	eio_wd_close_sync (wd);
		1811	#endif
		1812	}
1595		1813
1596	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1814	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1597		1815
1598	void	1816	void
1599	cancel (aio_req_ornot req)	1817	cancel (aio_req_ornot req)
1600	CODE:	1818	CODE:
1601	req_cancel (req);	1819	eio_cancel (req);
1602		1820
1603	void	1821	void
1604	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1822	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1605	CODE:	1823	PPCODE:
		1824	{
		1825	if (GIMME_V != G_VOID)
		1826	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1827
		1828	if (items > 1)
		1829	{
		1830	SV *cb_cv =get_cb (callback);
		1831
1606	SvREFCNT_dec (req->callback);	1832	SvREFCNT_dec (req->callback);
1607	req->callback = newSVsv (callback);	1833	req->callback = SvREFCNT_inc (cb_cv);
		1834	}
		1835	}
1608		1836
1609	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1837	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1610		1838
1611	void	1839	void
1612	add (aio_req grp, ...)	1840	add (aio_req grp, ...)
1613	PPCODE:	1841	PPCODE:
1614	{	1842	{
1615	int i;	1843	int i;
1616	aio_req req;
1617		1844
1618	if (grp->fd == 2)	1845	if (grp->int1 == 2)
1619	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1846	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1620		1847
1621	for (i = 1; i < items; ++i )	1848	for (i = 1; i < items; ++i )
1622	{	1849	{
		1850	aio_req req;
		1851
1623	if (GIMME_V != G_VOID)	1852	if (GIMME_V != G_VOID)
1624	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1853	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1625		1854
1626	req = SvAIO_REQ (ST (i));	1855	req = SvAIO_REQ (ST (i));
1627		1856
1628	if (req)	1857	if (req)
1629	{	1858	eio_grp_add (grp, req);
1630	++grp->length;
1631	req->grp = grp;
1632
1633	req->grp_prev = 0;
1634	req->grp_next = grp->grp_first;
1635
1636	if (grp->grp_first)
1637	grp->grp_first->grp_prev = req;
1638
1639	grp->grp_first = req;
1640	}
1641	}	1859	}
1642	}	1860	}
1643		1861
1644	void	1862	void
1645	cancel_subs (aio_req_ornot req)	1863	cancel_subs (aio_req_ornot req)
…		…
1654	AV *av;	1872	AV *av;
1655		1873
1656	grp->errorno = errno;	1874	grp->errorno = errno;
1657		1875
1658	av = newAV ();	1876	av = newAV ();
		1877	av_extend (av, items - 1);
1659		1878
1660	for (i = 1; i < items; ++i )	1879	for (i = 1; i < items; ++i )
1661	av_push (av, newSVsv (ST (i)));	1880	av_push (av, newSVsv (ST (i)));
1662		1881
1663	SvREFCNT_dec (grp->data);	1882	SvREFCNT_dec (grp->sv1);
1664	grp->data = (SV *)av;	1883	grp->sv1 = (SV *)av;
1665	}	1884	}
1666		1885
1667	void	1886	void
1668	errno (aio_req grp, int errorno = errno)	1887	errno (aio_req grp, int errorno = errno)
1669	CODE:	1888	CODE:
1670	grp->errorno = errorno;	1889	grp->errorno = errorno;
1671		1890
1672	void	1891	void
1673	limit (aio_req grp, int limit)	1892	limit (aio_req grp, int limit)
1674	CODE:	1893	CODE:
1675	grp->fd2 = limit;	1894	eio_grp_limit (grp, limit);
1676	aio_grp_feed (grp);
1677		1895
1678	void	1896	void
1679	feed (aio_req grp, SV *callback=&PL_sv_undef)	1897	feed (aio_req grp, SV *callback=&PL_sv_undef)
1680	CODE:	1898	CODE:
1681	{	1899	{
1682	SvREFCNT_dec (grp->fh2);	1900	SvREFCNT_dec (grp->sv2);
1683	grp->fh2 = newSVsv (callback);	1901	grp->sv2 = newSVsv (callback);
		1902	grp->feed = aio_grp_feed;
1684		1903
1685	if (grp->fd2 <= 0)	1904	if (grp->int2 <= 0)
1686	grp->fd2 = 2;	1905	grp->int2 = 2;
1687		1906
1688	aio_grp_feed (grp);	1907	eio_grp_limit (grp, grp->int2);
1689	}	1908	}
1690		1909

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