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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.83 by root, Sat Oct 28 00:17:30 2006 UTC vs.
Revision 1.204 by root, Sat Oct 1 10:48:04 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	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		386	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		387	&& SvSTASH (SvRV (sv)) != aio_req_stash
		388	&& !sv_derived_from (sv, "IO::AIO::REQ")))
315	croak ("object of class " AIO_REQ_KLASS " expected");	389	croak ("object of class IO::AIO::REQ expected");
316		390
317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	391	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318		392
319	return mg ? (aio_req)mg->mg_ptr : 0;	393	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	394	}
321		395
		396	static aio_wd
		397	SvAIO_WD (SV *sv)
		398	{
		399	if (!SvROK (sv)
		400	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		401	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		402	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		403
		404	return (aio_wd)(long)SvIVX (SvRV (sv));
		405	}
		406
		407	static void
322	static void aio_grp_feed (aio_req grp)	408	aio_grp_feed (aio_req grp)
323	{	409	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	410	if (grp->sv2 && SvOK (grp->sv2))
325	{	411	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	412	dSP;
331		413
332	ENTER;	414	ENTER;
333	SAVETMPS;	415	SAVETMPS;
334	PUSHMARK (SP);	416	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	417	XPUSHs (req_sv (grp, aio_grp_stash));
336	PUTBACK;	418	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	419	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	420	SPAGAIN;
339	FREETMPS;	421	FREETMPS;
340	LEAVE;	422	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	}	423	}
351	}	424	}
352		425
353	static void aio_grp_dec (aio_req grp)	426	static void
		427	req_submit (eio_req *req)
354	{	428	{
355	--grp->length;	429	eio_submit (req);
356		430
357	/* call feeder, if applicable */	431	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	432	{
363	req_invoke (grp);	433	dSP;
364	req_free (grp);	434	SV *cb = sv_2mortal (on_next_submit);
		435
		436	on_next_submit = 0;
		437
		438	PUSHMARK (SP);
		439	PUTBACK;
		440	call_sv (cb, G_DISCARD | G_EVAL);
365	}	441	}
366	}	442	}
367		443
		444	static int
368	static void req_invoke (aio_req req)	445	req_invoke (eio_req *req)
369	{	446	{
370	dSP;	447	if (req->flags & FLAG_SV2_RO_OFF)
		448	SvREADONLY_off (req->sv2);
371		449
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	450	if (!EIO_CANCELLED (req) && req->callback)
373	{	451	{
		452	dSP;
		453	static SV *sv_result_cache; /* caches the result integer SV */
		454	SV *sv_result;
		455
374	ENTER;	456	ENTER;
375	SAVETMPS;	457	SAVETMPS;
376	PUSHMARK (SP);	458	PUSHMARK (SP);
377	EXTEND (SP, 1);	459	EXTEND (SP, 1);
378		460
		461	/* do not recreate the result IV from scratch each time */
		462	if (expect_true (sv_result_cache))
		463	{
		464	sv_result = sv_result_cache; sv_result_cache = 0;
		465	SvIV_set (sv_result, req->result);
		466	SvIOK_only (sv_result);
		467	}
		468	else
		469	{
		470	sv_result = newSViv (req->result);
		471	SvREADONLY_on (sv_result);
		472	}
		473
379	switch (req->type)	474	switch (req->type)
380	{	475	{
		476	case EIO_WD_OPEN:
		477	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		478	break;
		479
381	case REQ_READDIR:	480	case EIO_READDIR:
382	{	481	{
383	SV *rv = &PL_sv_undef;	482	SV *rv = &PL_sv_undef;
384		483
385	if (req->result >= 0)	484	if (req->result >= 0)
386	{	485	{
387	int i;	486	int i;
388	char *buf = req->data2ptr;	487	char *names = (char *)req->ptr2;
		488	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	489	AV *av = newAV ();
390		490
391	av_extend (av, req->result - 1);	491	av_extend (av, req->result - 1);
392		492
393	for (i = 0; i < req->result; ++i)	493	for (i = 0; i < req->result; ++i)
394	{	494	{
395	SV *sv = newSVpv (buf, 0);	495	if (req->int1 & EIO_READDIR_DENTS)
		496	{
		497	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		498
		499	if (req->int1 & EIO_READDIR_CUSTOM2)
		500	{
		501	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		502	AV *avent = newAV ();
		503
		504	av_extend (avent, 2);
		505
		506	if (!sv_type [ent->type])
		507	{
		508	sv_type [ent->type] = newSViv (ent->type);
		509	SvREADONLY_on (sv_type [ent->type]);
		510	}
		511
		512	av_store (avent, 0, namesv);
		513	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		514	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		515
		516	av_store (av, i, newRV_noinc ((SV *)avent));
		517	}
		518	else
397	av_store (av, i, sv);	519	av_store (av, i, namesv);
		520
		521	++ent;
		522	}
		523	else
		524	{
		525	SV *name = newSVpv (names, 0);
		526	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	527	names += SvCUR (name) + 1;
		528	}
399	}	529	}
400		530
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	531	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	532	}
403		533
404	PUSHs (rv);	534	PUSHs (rv);
		535
		536	if (req->int1 & EIO_READDIR_CUSTOM1)
		537	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	538	}
406	break;	539	break;
407		540
408	case REQ_OPEN:	541	case EIO_OPEN:
409	{	542	{
410	/* convert fd to fh */	543	/* convert fd to fh */
411	SV *fh;	544	SV *fh = &PL_sv_undef;
412		545
413	PUSHs (sv_2mortal (newSViv (req->result)));	546	if (req->result >= 0)
414	PUTBACK;	547	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	548	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	549	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		550	char sym [64];
		551	int symlen;
		552
		553	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		554	gv_init (gv, aio_stash, sym, symlen, 0);
417		555
418	fh = SvREFCNT_inc (POPs);	556	symlen = snprintf (
		557	sym,
		558	sizeof (sym),
		559	"%s&=%d",
		560	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		561	(int)req->result
		562	);
419		563
		564	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		565	fh = (SV *)gv;
		566	}
		567
420	PUSHMARK (SP);	568	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	569	}
423	break;	570	break;
424		571
		572	case EIO_STATVFS:
		573	case EIO_FSTATVFS:
		574	{
		575	SV *rv = &PL_sv_undef;
		576
		577	#ifndef _WIN32
		578	if (req->result >= 0)
		579	{
		580	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		581	HV *hv = newHV ();
		582
		583	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		584
		585	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		586	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		587	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		588	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		589	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		590	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		591	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		592	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		593	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		594	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		595	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		596	}
		597	#endif
		598
		599	PUSHs (rv);
		600	}
		601
		602	break;
		603
425	case REQ_GROUP:	604	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	605	req->int1 = 2; /* mark group as finished */
427		606
428	if (req->data)	607	if (req->sv1)
429	{	608	{
430	int i;	609	int i;
431	AV *av = (AV *)req->data;	610	AV *av = (AV *)req->sv1;
432		611
433	EXTEND (SP, AvFILL (av) + 1);	612	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	613	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	614	PUSHs (*av_fetch (av, i, 0));
436	}	615	}
437	break;	616	break;
438		617
439	case REQ_NOP:	618	case EIO_NOP:
440	case REQ_BUSY:	619	case EIO_BUSY:
441	break;	620	break;
442		621
		622	case EIO_READLINK:
		623	case EIO_REALPATH:
		624	if (req->result > 0)
		625	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		626	break;
		627
		628	case EIO_STAT:
		629	case EIO_LSTAT:
		630	case EIO_FSTAT:
		631	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		632
		633	if (!(PL_laststatval = req->result))
		634	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		635	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		636
		637	PUSHs (sv_result);
		638	break;
		639
		640	case EIO_READ:
		641	{
		642	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		643	*SvEND (req->sv2) = 0;
		644	SvPOK_only (req->sv2);
		645	SvSETMAGIC (req->sv2);
		646	PUSHs (sv_result);
		647	}
		648	break;
		649
		650	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		651	if (req->result > 0)
		652	SvIV_set (sv_result, 0);
		653	/* FALLTHROUGH */
		654
443	default:	655	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	656	PUSHs (sv_result);
445	break;	657	break;
446	}	658	}
447		659
448	errno = req->errorno;	660	errno = req->errorno;
449		661
450	PUTBACK;	662	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	663	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	664	SPAGAIN;
		665
		666	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		667	SvREFCNT_dec (sv_result);
		668	else
		669	sv_result_cache = sv_result;
453		670
454	FREETMPS;	671	FREETMPS;
455	LEAVE;	672	LEAVE;
		673
		674	PUTBACK;
456	}	675	}
457		676
458	if (req->grp)	677	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	}	678	}
478		679
479	static void req_free (aio_req req)	680	static void
		681	req_destroy (aio_req req)
480	{	682	{
481	if (req->self)	683	if (req->self)
482	{	684	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	685	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	686	SvREFCNT_dec (req->self);
485	}	687	}
486		688
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	689	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	690	SvREFCNT_dec (req->sv2);
		691	SvREFCNT_dec (req->sv3);
		692	SvREFCNT_dec (req->sv4);
490	SvREFCNT_dec (req->callback);	693	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492		694
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495
496	Safefree (req);	695	free (req);
497	}	696	}
498		697
		698	static void
499	static void req_cancel_subs (aio_req grp)	699	req_cancel_subs (aio_req grp)
500	{	700	{
501	aio_req sub;
502
503	if (grp->type != REQ_GROUP)	701	if (grp->type != EIO_GROUP)
504	return;	702	return;
505		703
506	SvREFCNT_dec (grp->fh2);	704	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	705	grp->sv2 = 0;
508		706
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	707	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	708	}
512		709
513	static void req_cancel (aio_req req)	710	static void ecb_cold
		711	create_respipe (void)
514	{	712	{
515	req->flags |= FLAG_CANCELLED;	713	if (s_epipe_renew (&respipe))
516		714	croak ("IO::AIO: unable to initialize result pipe");
517	req_cancel_subs (req);
518	}	715	}
519		716
520	static void *aio_proc(void *arg);	717	static void
521		718	poll_wait (void)
522	static void start_thread (void)
523	{	719	{
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	LOCK (reqlock);
616	reqq_push (&req_queue, req);
617	pthread_cond_signal (&reqwait);
618	UNLOCK (reqlock);
619
620	LOCK (wrklock);
621	--started;
622	UNLOCK (wrklock);
623	}
624
625	static void min_parallel (int nthreads)
626	{
627	if (wanted < nthreads)
628	wanted = nthreads;
629	}
630
631	static void max_parallel (int nthreads)
632	{
633	if (wanted > nthreads)
634	wanted = nthreads;
635
636	while (started > wanted)
637	end_thread ();
638	}
639
640	static void poll_wait ()
641	{
642	fd_set rfd;
643
644	while (nreqs)	720	while (eio_nreqs ())
645	{	721	{
646	int size;	722	int size;
647	if (WORDREAD_UNSAFE) LOCK (reslock);	723
		724	X_LOCK (reslock);
648	size = res_queue.size;	725	size = res_queue.size;
649	if (WORDREAD_UNSAFE) UNLOCK (reslock);	726	X_UNLOCK (reslock);
650		727
651	if (size)	728	if (size)
652	return;	729	return;
653		730
654	maybe_start_thread ();	731	etp_maybe_start_thread ();
655		732
656	FD_ZERO(&rfd);	733	s_epipe_wait (&respipe);
657	FD_SET(respipe [0], &rfd);
658
659	select (respipe [0] + 1, &rfd, 0, 0, 0);
660	}	734	}
661	}	735	}
662		736
663	static int poll_cb (int max)	737	static int
		738	poll_cb (void)
664	{	739	{
665	dSP;
666	int count = 0;
667	int do_croak = 0;
668	aio_req req;
669
670	for (;;)	740	for (;;)
671	{	741	{
672	while (max <= 0 || count < max)	742	int res = eio_poll ();
		743
		744	if (res > 0)
		745	croak (0);
		746
		747	if (!max_outstanding || max_outstanding > eio_nreqs ())
		748	return res;
		749
		750	poll_wait ();
		751	}
		752	}
		753
		754	static void ecb_cold
		755	reinit (void)
		756	{
		757	create_respipe ();
		758
		759	if (eio_init (want_poll, done_poll) < 0)
		760	croak ("IO::AIO: unable to initialise eio library");
		761	}
		762
		763	/*****************************************************************************/
		764
		765	#if !_POSIX_MAPPED_FILES
		766	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		767	# define munmap(addr,length) (errno = ENOSYS, -1)
		768	#endif
		769
		770	#if !_POSIX_MEMORY_PROTECTION
		771	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		772	# define PROT_NONE 0
		773	# define PROT_WRITE 0
		774	# define MAP_PRIVATE 0
		775	# define MAP_SHARED 0
		776	# define MAP_FIXED 0
		777	#endif
		778
		779	#define MMAP_MAGIC PERL_MAGIC_ext
		780
		781	static int ecb_cold
		782	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		783	{
		784	int old_errno = errno;
		785	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		786	errno = old_errno;
		787
		788	mg->mg_obj = 0; /* just in case */
		789
		790	SvREADONLY_off (sv);
		791
		792	if (SvPVX (sv) != mg->mg_ptr)
		793	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		794
		795	SvCUR_set (sv, 0);
		796	SvPVX (sv) = 0;
		797	SvOK_off (sv);
		798
		799	return 0;
		800	}
		801
		802	static MGVTBL mmap_vtbl = {
		803	0, 0, 0, 0, mmap_free
		804	};
		805
		806	/*****************************************************************************/
		807
		808	static SV *
		809	get_cb (SV *cb_sv)
		810	{
		811	SvGETMAGIC (cb_sv);
		812	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		813	}
		814
		815	static aio_req ecb_noinline
		816	dreq (SV *callback)
		817	{
		818	SV *cb_cv;
		819	aio_req req;
		820	int req_pri = next_pri;
		821	next_pri = EIO_PRI_DEFAULT;
		822
		823	cb_cv = get_cb (callback);
		824
		825	req = calloc (sizeof (*req), 1);
		826	if (!req)
		827	croak ("out of memory during eio_req allocation");
		828
		829	req->callback = SvREFCNT_inc (cb_cv);
		830	req->pri = req_pri;
		831
		832	return req;
		833	}
		834
		835	#define dREQ \
		836	aio_req req = dreq (callback); \
		837
		838	#define REQ_SEND \
		839	PUTBACK; \
		840	req_submit (req); \
		841	SPAGAIN; \
		842	\
		843	if (GIMME_V != G_VOID) \
		844	XPUSHs (req_sv (req, aio_req_stash));
		845
		846	ecb_inline void
		847	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		848	{
		849	if (expect_false (SvROK (path)))
		850	{
		851	SV *rv = SvRV (path);
		852	SV *wdob;
		853
		854	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
673	{	855	{
674	maybe_start_thread ();	856	path = AvARRAY (rv)[1];
		857	wdob = AvARRAY (rv)[0];
675		858
676	LOCK (reslock);	859	if (SvOK (wdob))
677	req = reqq_shift (&res_queue);
678
679	if (req)
680	{	860	{
681	--npending;	861	*wd = SvAIO_WD (wdob);
682		862	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
683	if (!res_queue.size)
684	{
685	/* read any signals sent by the worker threads */
686	char buf [32];
687	while (read (respipe [0], buf, 32) == 32)
688	;
689	}
690	}
691
692	UNLOCK (reslock);
693
694	if (!req)
695	break;
696
697	--nreqs;
698
699	if (req->type == REQ_GROUP && req->length)
700	{
701	req->fd = 1; /* mark request as delayed */
702	continue;
703	}	863	}
704	else	864	else
705	{	865	*wd = EIO_INVALID_WD;
706	if (req->type == REQ_READ)
707	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
708
709	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
710	SvREADONLY_off (req->data);
711
712	if (req->statdata)
713	{
714	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
715	PL_laststatval = req->result;
716	PL_statcache = *(req->statdata);
717	}
718
719	req_invoke (req);
720
721	count++;
722	}
723
724	req_free (req);
725	}	866	}
		867	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		868	{
		869	*wd = SvIVX (rv);
		870	*wdsv = SvREFCNT_inc_NN (rv);
		871	*ptr = ".";
		872	return; /* path set to "." */
		873	}
		874	else
		875	croak ("IO::AIO: pathname arguments must be specified as strings, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		876	}
726		877
727	if (nreqs <= max_outstanding)	878	*pathsv = newSVsv (path);
		879	*ptr = SvPVbyte_nolen (*pathsv);
		880	}
		881
		882	static void ecb_noinline
		883	req_set_path1 (aio_req req, SV *path)
		884	{
		885	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		886	}
		887
		888	static void ecb_noinline
		889	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		890	{
		891	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		892
		893	switch (SvTYPE (rv))
		894	{
		895	case SVt_PVIO:
		896	case SVt_PVLV:
		897	case SVt_PVGV:
		898	req->type = type_fh;
		899	req->sv1 = newSVsv (fh_or_path);
		900	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
728	break;	901	break;
729		902
730	poll_wait ();	903	default:
731		904	req->type = type_path;
732	max = 0;	905	req_set_path1 (req, fh_or_path);
		906	break;
733	}	907	}
734
735	return count;
736	}	908	}
737		909
738	static void create_pipe ()	910	XS(boot_IO__AIO) ecb_cold;
739	{
740	if (pipe (respipe))
741	croak ("unable to initialize result pipe");
742		911
743	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
744	croak ("cannot set result pipe to nonblocking mode");
745
746	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
747	croak ("cannot set result pipe to nonblocking mode");
748	}
749
750	/*****************************************************************************/
751	/* work around various missing functions */
752
753	#if !HAVE_PREADWRITE
754	# define pread aio_pread
755	# define pwrite aio_pwrite
756
757	/*
758	* make our pread/pwrite safe against themselves, but not against
759	* normal read/write by using a mutex. slows down execution a lot,
760	* but that's your problem, not mine.
761	*/
762	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
763
764	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
765	{
766	ssize_t res;
767	off_t ooffset;
768
769	LOCK (preadwritelock);
770	ooffset = lseek (fd, 0, SEEK_CUR);
771	lseek (fd, offset, SEEK_SET);
772	res = read (fd, buf, count);
773	lseek (fd, ooffset, SEEK_SET);
774	UNLOCK (preadwritelock);
775
776	return res;
777	}
778
779	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
780	{
781	ssize_t res;
782	off_t ooffset;
783
784	LOCK (preadwritelock);
785	ooffset = lseek (fd, 0, SEEK_CUR);
786	lseek (fd, offset, SEEK_SET);
787	res = write (fd, buf, count);
788	lseek (fd, offset, SEEK_SET);
789	UNLOCK (preadwritelock);
790
791	return res;
792	}
793	#endif
794
795	#if !HAVE_FDATASYNC
796	# define fdatasync fsync
797	#endif
798
799	#if !HAVE_READAHEAD
800	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
801
802	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
803	{
804	dBUF;
805
806	while (count > 0)
807	{
808	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
809
810	pread (fd, aio_buf, len, offset);
811	offset += len;
812	count -= len;
813	}
814
815	errno = 0;
816	}
817
818	#endif
819
820	#if !HAVE_READDIR_R
821	# define readdir_r aio_readdir_r
822
823	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
824
825	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
826	{
827	struct dirent *e;
828	int errorno;
829
830	LOCK (readdirlock);
831
832	e = readdir (dirp);
833	errorno = errno;
834
835	if (e)
836	{
837	*res = ent;
838	strcpy (ent->d_name, e->d_name);
839	}
840	else
841	*res = 0;
842
843	UNLOCK (readdirlock);
844
845	errno = errorno;
846	return e ? 0 : -1;
847	}
848	#endif
849
850	/* sendfile always needs emulation */
851	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
852	{
853	ssize_t res;
854
855	if (!count)
856	return 0;
857
858	#if HAVE_SENDFILE
859	# if __linux
860	res = sendfile (ofd, ifd, &offset, count);
861
862	# elif __freebsd
863	/*
864	* Of course, the freebsd sendfile is a dire hack with no thoughts
865	* wasted on making it similar to other I/O functions.
866	*/
867	{
868	off_t sbytes;
869	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
870
871	if (res < 0 && sbytes)
872	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
873	res = sbytes;
874	}
875
876	# elif __hpux
877	res = sendfile (ofd, ifd, offset, count, 0, 0);
878
879	# elif __solaris
880	{
881	struct sendfilevec vec;
882	size_t sbytes;
883
884	vec.sfv_fd = ifd;
885	vec.sfv_flag = 0;
886	vec.sfv_off = offset;
887	vec.sfv_len = count;
888
889	res = sendfilev (ofd, &vec, 1, &sbytes);
890
891	if (res < 0 && sbytes)
892	res = sbytes;
893	}
894
895	# endif
896	#else
897	res = -1;
898	errno = ENOSYS;
899	#endif
900
901	if (res < 0
902	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
903	#if __solaris
904	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
905	#endif
906	)
907	)
908	{
909	/* emulate sendfile. this is a major pain in the ass */
910	dBUF;
911
912	res = 0;
913
914	while (count)
915	{
916	ssize_t cnt;
917
918	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
919
920	if (cnt <= 0)
921	{
922	if (cnt && !res) res = -1;
923	break;
924	}
925
926	cnt = write (ofd, aio_buf, cnt);
927
928	if (cnt <= 0)
929	{
930	if (cnt && !res) res = -1;
931	break;
932	}
933
934	offset += cnt;
935	res += cnt;
936	count -= cnt;
937	}
938	}
939
940	return res;
941	}
942
943	/* read a full directory */
944	static void scandir_ (aio_req req, worker *self)
945	{
946	DIR *dirp;
947	union
948	{
949	struct dirent d;
950	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
951	} *u;
952	struct dirent *entp;
953	char *name, *names;
954	int memlen = 4096;
955	int memofs = 0;
956	int res = 0;
957	int errorno;
958
959	LOCK (wrklock);
960	self->dirp = dirp = opendir (req->dataptr);
961	self->dbuf = u = malloc (sizeof (*u));
962	req->data2ptr = names = malloc (memlen);
963	UNLOCK (wrklock);
964
965	if (dirp && u && names)
966	for (;;)
967	{
968	errno = 0;
969	readdir_r (dirp, &u->d, &entp);
970
971	if (!entp)
972	break;
973
974	name = entp->d_name;
975
976	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
977	{
978	int len = strlen (name) + 1;
979
980	res++;
981
982	while (memofs + len > memlen)
983	{
984	memlen *= 2;
985	LOCK (wrklock);
986	req->data2ptr = names = realloc (names, memlen);
987	UNLOCK (wrklock);
988
989	if (!names)
990	break;
991	}
992
993	memcpy (names + memofs, name, len);
994	memofs += len;
995	}
996	}
997
998	if (errno)
999	res = -1;
1000
1001	req->result = res;
1002	}
1003
1004	/*****************************************************************************/
1005
1006	static void *aio_proc (void *thr_arg)
1007	{
1008	aio_req req;
1009	worker *self = (worker *)thr_arg;
1010
1011	for (;;)
1012	{
1013	LOCK (reqlock);
1014
1015	for (;;)
1016	{
1017	self->req = req = reqq_shift (&req_queue);
1018
1019	if (req)
1020	break;
1021
1022	pthread_cond_wait (&reqwait, &reqlock);
1023	}
1024
1025	--nready;
1026
1027	UNLOCK (reqlock);
1028
1029	errno = 0; /* strictly unnecessary */
1030
1031	if (!(req->flags & FLAG_CANCELLED))
1032	switch (req->type)
1033	{
1034	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1035	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1036
1037	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1038	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1039
1040	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1041	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1042	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1043
1044	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1045	case REQ_CLOSE: req->result = close (req->fd); break;
1046	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1047	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1048	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1049	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1050	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1051	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1052
1053	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1054	case REQ_FSYNC: req->result = fsync (req->fd); break;
1055	case REQ_READDIR: scandir_ (req, self); break;
1056
1057	case REQ_BUSY:
1058	{
1059	struct timeval tv;
1060
1061	tv.tv_sec = req->fd;
1062	tv.tv_usec = req->fd2;
1063
1064	req->result = select (0, 0, 0, 0, &tv);
1065	}
1066
1067	case REQ_GROUP:
1068	case REQ_NOP:
1069	break;
1070
1071	case REQ_QUIT:
1072	LOCK (wrklock);
1073	worker_free (self);
1074	--started;
1075	UNLOCK (wrklock);
1076	return 0;
1077
1078	default:
1079	req->result = ENOSYS;
1080	break;
1081	}
1082
1083	req->errorno = errno;
1084
1085	LOCK (reslock);
1086
1087	++npending;
1088
1089	if (!reqq_push (&res_queue, req))
1090	/* write a dummy byte to the pipe so fh becomes ready */
1091	write (respipe [1], &respipe, 1);
1092
1093	self->req = 0;
1094	worker_clear (self);
1095
1096	UNLOCK (reslock);
1097	}
1098	}
1099
1100	/*****************************************************************************/
1101
1102	static void atfork_prepare (void)
1103	{
1104	LOCK (wrklock);
1105	LOCK (reqlock);
1106	LOCK (reslock);
1107	#if !HAVE_PREADWRITE
1108	LOCK (preadwritelock);
1109	#endif
1110	#if !HAVE_READDIR_R
1111	LOCK (readdirlock);
1112	#endif
1113	}
1114
1115	static void atfork_parent (void)
1116	{
1117	#if !HAVE_READDIR_R
1118	UNLOCK (readdirlock);
1119	#endif
1120	#if !HAVE_PREADWRITE
1121	UNLOCK (preadwritelock);
1122	#endif
1123	UNLOCK (reslock);
1124	UNLOCK (reqlock);
1125	UNLOCK (wrklock);
1126	}
1127
1128	static void atfork_child (void)
1129	{
1130	aio_req prv;
1131
1132	while (prv = reqq_shift (&req_queue))
1133	req_free (prv);
1134
1135	while (prv = reqq_shift (&res_queue))
1136	req_free (prv);
1137
1138	while (wrk_first.next != &wrk_first)
1139	{
1140	worker *wrk = wrk_first.next;
1141
1142	if (wrk->req)
1143	req_free (wrk->req);
1144
1145	worker_clear (wrk);
1146	worker_free (wrk);
1147	}
1148
1149	started = 0;
1150	nreqs = 0;
1151
1152	close (respipe [0]);
1153	close (respipe [1]);
1154	create_pipe ();
1155
1156	atfork_parent ();
1157	}
1158
1159	#define dREQ \
1160	aio_req req; \
1161	int req_pri = next_pri; \
1162	next_pri = DEFAULT_PRI + PRI_BIAS; \
1163	\
1164	if (SvOK (callback) && !SvROK (callback)) \
1165	croak ("callback must be undef or of reference type"); \
1166	\
1167	Newz (0, req, 1, aio_cb); \
1168	if (!req) \
1169	croak ("out of memory during aio_req allocation"); \
1170	\
1171	req->callback = newSVsv (callback); \
1172	req->pri = req_pri
1173
1174	#define REQ_SEND \
1175	req_send (req); \
1176	\
1177	if (GIMME_V != G_VOID) \
1178	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1179
1180	MODULE = IO::AIO PACKAGE = IO::AIO	912	MODULE = IO::AIO PACKAGE = IO::AIO
1181		913
1182	PROTOTYPES: ENABLE	914	PROTOTYPES: ENABLE
1183		915
1184	BOOT:	916	BOOT:
1185	{	917	{
		918	static const struct {
		919	const char *name;
		920	IV iv;
		921	} *civ, const_iv[] = {
		922	# define const_niv(name, value) { # name, (IV) value },
		923	# define const_iv(name) { # name, (IV) name },
		924	# define const_eio(name) { # name, (IV) EIO_ ## name },
		925	const_iv (EXDEV)
		926	const_iv (ENOSYS)
		927	const_iv (O_RDONLY)
		928	const_iv (O_WRONLY)
		929	const_iv (O_RDWR)
		930	const_iv (O_CREAT)
		931	const_iv (O_TRUNC)
		932	const_iv (O_EXCL)
		933	const_iv (O_APPEND)
		934
		935	const_iv (O_ASYNC)
		936	const_iv (O_DIRECT)
		937	const_iv (O_NOATIME)
		938
		939	const_iv (O_CLOEXEC)
		940	const_iv (O_NOCTTY)
		941	const_iv (O_NOFOLLOW)
		942	const_iv (O_NONBLOCK)
		943	const_iv (O_EXEC)
		944	const_iv (O_SEARCH)
		945	const_iv (O_DIRECTORY)
		946	const_iv (O_DSYNC)
		947	const_iv (O_RSYNC)
		948	const_iv (O_SYNC)
		949	const_iv (O_TTY_INIT)
		950
		951	const_iv (S_IFIFO)
		952	const_iv (S_IFCHR)
		953	const_iv (S_IFBLK)
		954	const_iv (S_IFLNK)
		955	const_iv (S_IFREG)
		956	const_iv (S_IFDIR)
		957	const_iv (S_IFWHT)
		958	const_iv (S_IFSOCK)
		959	const_iv (S_IFMT)
		960
		961	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		962	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		963	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		964	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		965	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		966	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		967
		968	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		969	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		970	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		971	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		972	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		973
		974	const_iv (ST_RDONLY)
		975	const_iv (ST_NOSUID)
		976	const_iv (ST_NODEV)
		977	const_iv (ST_NOEXEC)
		978	const_iv (ST_SYNCHRONOUS)
		979	const_iv (ST_MANDLOCK)
		980	const_iv (ST_WRITE)
		981	const_iv (ST_APPEND)
		982	const_iv (ST_IMMUTABLE)
		983	const_iv (ST_NOATIME)
		984	const_iv (ST_NODIRATIME)
		985	const_iv (ST_RELATIME)
		986
		987	const_iv (PROT_NONE)
		988	const_iv (PROT_EXEC)
		989	const_iv (PROT_READ)
		990	const_iv (PROT_WRITE)
		991
		992	/*const_iv (MAP_FIXED)*/
		993	const_iv (MAP_PRIVATE)
		994	const_iv (MAP_SHARED)
		995	const_iv (MAP_ANONYMOUS)
		996
		997	/* linuxish */
		998	const_iv (MAP_HUGETLB)
		999	const_iv (MAP_LOCKED)
		1000	const_iv (MAP_NORESERVE)
		1001	const_iv (MAP_POPULATE)
		1002	const_iv (MAP_NONBLOCK)
		1003
		1004	const_eio (MCL_FUTURE)
		1005	const_eio (MCL_CURRENT)
		1006
		1007	const_eio (MS_ASYNC)
		1008	const_eio (MS_INVALIDATE)
		1009	const_eio (MS_SYNC)
		1010
		1011	const_eio (MT_MODIFY)
		1012
		1013	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1014	const_eio (SYNC_FILE_RANGE_WRITE)
		1015	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1016
		1017	const_eio (FALLOC_FL_KEEP_SIZE)
		1018
		1019	const_eio (READDIR_DENTS)
		1020	const_eio (READDIR_DIRS_FIRST)
		1021	const_eio (READDIR_STAT_ORDER)
		1022	const_eio (READDIR_FOUND_UNKNOWN)
		1023
		1024	const_eio (DT_UNKNOWN)
		1025	const_eio (DT_FIFO)
		1026	const_eio (DT_CHR)
		1027	const_eio (DT_DIR)
		1028	const_eio (DT_BLK)
		1029	const_eio (DT_REG)
		1030	const_eio (DT_LNK)
		1031	const_eio (DT_SOCK)
		1032	const_eio (DT_WHT)
		1033	};
		1034
1186	HV *stash = gv_stashpv ("IO::AIO", 1);	1035	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1036	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1037	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1038	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1187		1039
1188	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1040	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1189	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1041	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1190	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1191	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1192	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1193	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1194		1042
1195	create_pipe ();	1043	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1196	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1197		1044
1198	start_thread ();	1045	reinit ();
1199	}	1046	}
1200		1047
1201	void	1048	void
1202	min_parallel (int nthreads)	1049	reinit ()
1203	PROTOTYPE: $	1050	PROTOTYPE:
1204		1051
1205	void	1052	void
1206	max_parallel (int nthreads)	1053	max_poll_reqs (unsigned int nreqs)
1207	PROTOTYPE: $
1208
1209	int
1210	max_outstanding (int maxreqs)
1211	PROTOTYPE: $	1054	PROTOTYPE: $
1212	CODE:	1055	CODE:
1213	RETVAL = max_outstanding;	1056	eio_set_max_poll_reqs (nreqs);
		1057
		1058	void
		1059	max_poll_time (double nseconds)
		1060	PROTOTYPE: $
		1061	CODE:
		1062	eio_set_max_poll_time (nseconds);
		1063
		1064	void
		1065	min_parallel (unsigned int nthreads)
		1066	PROTOTYPE: $
		1067	CODE:
		1068	eio_set_min_parallel (nthreads);
		1069
		1070	void
		1071	max_parallel (unsigned int nthreads)
		1072	PROTOTYPE: $
		1073	CODE:
		1074	eio_set_max_parallel (nthreads);
		1075
		1076	void
		1077	max_idle (unsigned int nthreads)
		1078	PROTOTYPE: $
		1079	CODE:
		1080	eio_set_max_idle (nthreads);
		1081
		1082	void
		1083	idle_timeout (unsigned int seconds)
		1084	PROTOTYPE: $
		1085	CODE:
		1086	eio_set_idle_timeout (seconds);
		1087
		1088	void
		1089	max_outstanding (unsigned int maxreqs)
		1090	PROTOTYPE: $
		1091	CODE:
1214	max_outstanding = maxreqs;	1092	max_outstanding = maxreqs;
1215	OUTPUT:
1216	RETVAL
1217		1093
1218	void	1094	void
1219	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1095	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1220	SV * pathname
1221	int flags
1222	int mode
1223	SV * callback
1224	PROTOTYPE: $$$;$
1225	PPCODE:	1096	PPCODE:
1226	{	1097	{
1227	dREQ;	1098	dREQ;
1228		1099
1229	req->type = REQ_OPEN;	1100	req->type = EIO_WD_OPEN;
1230	req->data = newSVsv (pathname);	1101	req_set_path1 (req, pathname);
1231	req->dataptr = SvPVbyte_nolen (req->data);
1232	req->fd = flags;
1233	req->mode = mode;
1234		1102
1235	REQ_SEND;	1103	REQ_SEND;
1236	}	1104	}
1237		1105
1238	void	1106	void
		1107	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1108	PPCODE:
		1109	{
		1110	dREQ;
		1111
		1112	req->type = EIO_OPEN;
		1113	req_set_path1 (req, pathname);
		1114	req->int1 = flags;
		1115	req->int2 = mode;
		1116
		1117	REQ_SEND;
		1118	}
		1119
		1120	void
1239	aio_close (fh,callback=&PL_sv_undef)	1121	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1240	SV * fh
1241	SV * callback
1242	PROTOTYPE: $;$
1243	ALIAS:	1122	ALIAS:
1244	aio_close = REQ_CLOSE
1245	aio_fsync = REQ_FSYNC	1123	aio_fsync = EIO_FSYNC
1246	aio_fdatasync = REQ_FDATASYNC	1124	aio_fdatasync = EIO_FDATASYNC
		1125	aio_syncfs = EIO_SYNCFS
1247	PPCODE:	1126	PPCODE:
1248	{	1127	{
		1128	int fd = s_fileno_croak (fh, 0);
1249	dREQ;	1129	dREQ;
1250		1130
1251	req->type = ix;	1131	req->type = ix;
1252	req->fh = newSVsv (fh);	1132	req->sv1 = newSVsv (fh);
1253	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1133	req->int1 = fd;
1254		1134
1255	REQ_SEND (req);	1135	REQ_SEND (req);
1256	}	1136	}
1257		1137
1258	void	1138	void
		1139	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1140	PPCODE:
		1141	{
		1142	int fd = s_fileno_croak (fh, 0);
		1143	dREQ;
		1144
		1145	req->type = EIO_SYNC_FILE_RANGE;
		1146	req->sv1 = newSVsv (fh);
		1147	req->int1 = fd;
		1148	req->offs = offset;
		1149	req->size = nbytes;
		1150	req->int2 = flags;
		1151
		1152	REQ_SEND (req);
		1153	}
		1154
		1155	void
		1156	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1157	PPCODE:
		1158	{
		1159	int fd = s_fileno_croak (fh, 0);
		1160	dREQ;
		1161
		1162	req->type = EIO_FALLOCATE;
		1163	req->sv1 = newSVsv (fh);
		1164	req->int1 = fd;
		1165	req->int2 = mode;
		1166	req->offs = offset;
		1167	req->size = len;
		1168
		1169	REQ_SEND (req);
		1170	}
		1171
		1172	void
		1173	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1174	PPCODE:
		1175	{
		1176	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1177	int fd = s_fileno_croak (fh, 0);
		1178	dREQ;
		1179
		1180	if (expect_false (close_fd < 0))
		1181	{
		1182	int pipefd [2];
		1183
		1184	if (
		1185	#ifdef _WIN32
		1186	_pipe (pipefd, 1, _O_BINARY) < 0
		1187	#else
		1188	pipe (pipefd) < 0
		1189	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1190	#endif
		1191	|| close (pipefd [1]) < 0
		1192	)
		1193	abort (); /*D*/
		1194
		1195	close_fd = pipefd [0];
		1196	}
		1197
		1198	req->type = EIO_DUP2;
		1199	req->int1 = close_fd;
		1200	req->sv2 = newSVsv (fh);
		1201	req->int2 = fd;
		1202
		1203	REQ_SEND (req);
		1204	}
		1205
		1206	void
1259	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1207	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1260	SV * fh
1261	UV offset
1262	UV length
1263	SV * data
1264	UV dataoffset
1265	SV * callback
1266	ALIAS:	1208	ALIAS:
1267	aio_read = REQ_READ	1209	aio_read = EIO_READ
1268	aio_write = REQ_WRITE	1210	aio_write = EIO_WRITE
1269	PROTOTYPE: $$$$$;$
1270	PPCODE:	1211	PPCODE:
1271	{	1212	{
1272	aio_req req;
1273	STRLEN svlen;	1213	STRLEN svlen;
		1214	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1274	char *svptr = SvPVbyte (data, svlen);	1215	char *svptr = SvPVbyte (data, svlen);
1275		1216	UV len = SvUV (length);
1276	SvUPGRADE (data, SVt_PV);
1277	SvPOK_on (data);
1278		1217
1279	if (dataoffset < 0)	1218	if (dataoffset < 0)
1280	dataoffset += svlen;	1219	dataoffset += svlen;
1281		1220
1282	if (dataoffset < 0 || dataoffset > svlen)	1221	if (dataoffset < 0 || dataoffset > svlen)
1283	croak ("data offset outside of string");	1222	croak ("dataoffset outside of data scalar");
1284		1223
1285	if (ix == REQ_WRITE)	1224	if (ix == EIO_WRITE)
1286	{	1225	{
1287	/* write: check length and adjust. */	1226	/* write: check length and adjust. */
1288	if (length < 0 || length + dataoffset > svlen)	1227	if (!SvOK (length) || len + dataoffset > svlen)
1289	length = svlen - dataoffset;	1228	len = svlen - dataoffset;
1290	}	1229	}
1291	else	1230	else
1292	{	1231	{
1293	/* read: grow scalar as necessary */	1232	/* read: check type and grow scalar as necessary */
		1233	SvUPGRADE (data, SVt_PV);
1294	svptr = SvGROW (data, length + dataoffset);	1234	svptr = SvGROW (data, len + dataoffset + 1);
1295	}	1235	}
1296
1297	if (length < 0)
1298	croak ("length must not be negative");
1299		1236
1300	{	1237	{
1301	dREQ;	1238	dREQ;
1302		1239
1303	req->type = ix;	1240	req->type = ix;
1304	req->fh = newSVsv (fh);	1241	req->sv1 = newSVsv (fh);
1305	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1242	req->int1 = fd;
1306	: IoOFP (sv_2io (fh)));	1243	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1307	req->offset = offset;	1244	req->size = len;
1308	req->length = length;
1309	req->data = SvREFCNT_inc (data);	1245	req->sv2 = SvREFCNT_inc (data);
1310	req->dataptr = (char *)svptr + dataoffset;	1246	req->ptr2 = (char *)svptr + dataoffset;
		1247	req->stroffset = dataoffset;
1311		1248
1312	if (!SvREADONLY (data))	1249	if (!SvREADONLY (data))
1313	{	1250	{
1314	SvREADONLY_on (data);	1251	SvREADONLY_on (data);
1315	req->data2ptr = (void *)data;	1252	req->flags |= FLAG_SV2_RO_OFF;
1316	}	1253	}
1317		1254
1318	REQ_SEND;	1255	REQ_SEND;
1319	}	1256	}
1320	}	1257	}
1321		1258
1322	void	1259	void
1323	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1260	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1324	SV * out_fh	1261	ALIAS:
1325	SV * in_fh	1262	aio_readlink = EIO_READLINK
1326	UV in_offset	1263	aio_realpath = EIO_REALPATH
1327	UV length
1328	SV * callback
1329	PROTOTYPE: $$$$;$
1330	PPCODE:	1264	PPCODE:
1331	{	1265	{
		1266	dREQ;
		1267
		1268	req->type = ix;
		1269	req_set_path1 (req, pathname);
		1270
		1271	REQ_SEND;
		1272	}
		1273
		1274	void
		1275	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1276	PPCODE:
		1277	{
		1278	int ifd = s_fileno_croak (in_fh , 0);
		1279	int ofd = s_fileno_croak (out_fh, 1);
1332	dREQ;	1280	dREQ;
1333		1281
1334	req->type = REQ_SENDFILE;	1282	req->type = EIO_SENDFILE;
1335	req->fh = newSVsv (out_fh);	1283	req->sv1 = newSVsv (out_fh);
1336	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1284	req->int1 = ofd;
1337	req->fh2 = newSVsv (in_fh);	1285	req->sv2 = newSVsv (in_fh);
1338	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1286	req->int2 = ifd;
1339	req->offset = in_offset;	1287	req->offs = in_offset;
1340	req->length = length;	1288	req->size = length;
1341		1289
1342	REQ_SEND;	1290	REQ_SEND;
1343	}	1291	}
1344		1292
1345	void	1293	void
1346	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1294	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1347	SV * fh
1348	UV offset
1349	IV length
1350	SV * callback
1351	PROTOTYPE: $$$;$
1352	PPCODE:	1295	PPCODE:
1353	{	1296	{
		1297	int fd = s_fileno_croak (fh, 0);
1354	dREQ;	1298	dREQ;
1355		1299
1356	req->type = REQ_READAHEAD;	1300	req->type = EIO_READAHEAD;
1357	req->fh = newSVsv (fh);	1301	req->sv1 = newSVsv (fh);
1358	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1302	req->int1 = fd;
1359	req->offset = offset;	1303	req->offs = offset;
1360	req->length = length;	1304	req->size = length;
1361		1305
1362	REQ_SEND;	1306	REQ_SEND;
1363	}	1307	}
1364		1308
1365	void	1309	void
1366	aio_stat (fh_or_path,callback=&PL_sv_undef)	1310	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1367	SV * fh_or_path
1368	SV * callback
1369	ALIAS:	1311	ALIAS:
1370	aio_stat = REQ_STAT	1312	aio_stat = EIO_STAT
1371	aio_lstat = REQ_LSTAT	1313	aio_lstat = EIO_LSTAT
		1314	aio_statvfs = EIO_STATVFS
1372	PPCODE:	1315	PPCODE:
1373	{	1316	{
1374	dREQ;	1317	dREQ;
1375		1318
1376	New (0, req->statdata, 1, Stat_t);	1319	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1377	if (!req->statdata)
1378	{
1379	req_free (req);
1380	croak ("out of memory during aio_req->statdata allocation");
1381	}
1382
1383	if (SvPOK (fh_or_path))
1384	{
1385	req->type = ix;
1386	req->data = newSVsv (fh_or_path);
1387	req->dataptr = SvPVbyte_nolen (req->data);
1388	}
1389	else
1390	{
1391	req->type = REQ_FSTAT;
1392	req->fh = newSVsv (fh_or_path);
1393	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1394	}
1395		1320
1396	REQ_SEND;	1321	REQ_SEND;
1397	}	1322	}
1398		1323
		1324	UV
		1325	major (UV dev)
		1326	ALIAS:
		1327	minor = 1
		1328	CODE:
		1329	RETVAL = ix ? major (dev) : minor (dev);
		1330	OUTPUT:
		1331	RETVAL
		1332
		1333	UV
		1334	makedev (UV maj, UV min)
		1335	CODE:
		1336	RETVAL = makedev (maj, min);
		1337	OUTPUT:
		1338	RETVAL
		1339
1399	void	1340	void
		1341	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1342	PPCODE:
		1343	{
		1344	dREQ;
		1345
		1346	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1347	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1348	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1355	PPCODE:
		1356	{
		1357	dREQ;
		1358
		1359	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1360	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1361
		1362	REQ_SEND;
		1363	}
		1364
		1365	void
		1366	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1367	PPCODE:
		1368	{
		1369	dREQ;
		1370
		1371	req->int2 = mode;
		1372	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1373
		1374	REQ_SEND;
		1375	}
		1376
		1377	void
		1378	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1379	PPCODE:
		1380	{
		1381	dREQ;
		1382
		1383	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1384	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1385	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1386
		1387	REQ_SEND;
		1388	}
		1389
		1390	void
		1391	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1392	PPCODE:
		1393	{
		1394	dREQ;
		1395
		1396	req->type = EIO_READDIR;
		1397	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1398
		1399	if (flags & EIO_READDIR_DENTS)
		1400	req->int1 |= EIO_READDIR_CUSTOM2;
		1401
		1402	req_set_path1 (req, pathname);
		1403
		1404	REQ_SEND;
		1405	}
		1406
		1407	void
		1408	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1409	PPCODE:
		1410	{
		1411	dREQ;
		1412
		1413	req->type = EIO_MKDIR;
		1414	req->int2 = mode;
		1415	req_set_path1 (req, pathname);
		1416
		1417	REQ_SEND;
		1418	}
		1419
		1420	void
1400	aio_unlink (pathname,callback=&PL_sv_undef)	1421	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1401	SV * pathname
1402	SV * callback
1403	ALIAS:	1422	ALIAS:
1404	aio_unlink = REQ_UNLINK	1423	aio_unlink = EIO_UNLINK
1405	aio_rmdir = REQ_RMDIR	1424	aio_rmdir = EIO_RMDIR
1406	aio_readdir = REQ_READDIR	1425	aio_readdir = EIO_READDIR
1407	PPCODE:	1426	PPCODE:
1408	{	1427	{
1409	dREQ;	1428	dREQ;
1410		1429
1411	req->type = ix;	1430	req->type = ix;
1412	req->data = newSVsv (pathname);	1431	req_set_path1 (req, pathname);
1413	req->dataptr = SvPVbyte_nolen (req->data);	1432
		1433	REQ_SEND;
		1434	}
		1435
		1436	void
		1437	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1438	ALIAS:
		1439	aio_link = EIO_LINK
		1440	aio_symlink = EIO_SYMLINK
		1441	aio_rename = EIO_RENAME
		1442	PPCODE:
		1443	{
		1444	dREQ;
		1445	eio_wd wd2 = 0;
		1446
		1447	req->type = ix;
		1448	req_set_path1 (req, oldpath);
		1449	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1450	req->int3 = (long)wd2;
1414		1451
1415	REQ_SEND;	1452	REQ_SEND;
1416	}	1453	}
1417		1454
1418	void	1455	void
1419	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1456	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1420	SV * oldpath
1421	SV * newpath
1422	SV * callback
1423	ALIAS:
1424	aio_link = REQ_LINK
1425	aio_symlink = REQ_SYMLINK
1426	aio_rename = REQ_RENAME
1427	PPCODE:	1457	PPCODE:
1428	{	1458	{
1429	dREQ;	1459	dREQ;
1430		1460
1431	req->type = ix;	1461	req->type = EIO_MKNOD;
1432	req->fh = newSVsv (oldpath);	1462	req->int2 = (mode_t)mode;
1433	req->data2ptr = SvPVbyte_nolen (req->fh);	1463	req->offs = dev;
1434	req->data = newSVsv (newpath);	1464	req_set_path1 (req, pathname);
1435	req->dataptr = SvPVbyte_nolen (req->data);
1436		1465
1437	REQ_SEND;	1466	REQ_SEND;
1438	}	1467	}
1439		1468
1440	void	1469	void
1441	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1470	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1442	SV * pathname	1471	ALIAS:
1443	SV * callback	1472	aio_mtouch = EIO_MTOUCH
1444	UV mode	1473	aio_msync = EIO_MSYNC
1445	UV dev	1474	PPCODE:
		1475	{
		1476	STRLEN svlen;
		1477	char *svptr = SvPVbyte (data, svlen);
		1478	UV len = SvUV (length);
		1479
		1480	if (offset < 0)
		1481	offset += svlen;
		1482
		1483	if (offset < 0 || offset > svlen)
		1484	croak ("offset outside of scalar");
		1485
		1486	if (!SvOK (length) || len + offset > svlen)
		1487	len = svlen - offset;
		1488
		1489	{
		1490	dREQ;
		1491
		1492	req->type = ix;
		1493	req->sv2 = SvREFCNT_inc (data);
		1494	req->ptr2 = (char *)svptr + offset;
		1495	req->size = len;
		1496	req->int1 = flags;
		1497
		1498	REQ_SEND;
		1499	}
		1500	}
		1501
		1502	void
		1503	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1504	PPCODE:
		1505	{
		1506	STRLEN svlen;
		1507	char *svptr = SvPVbyte (data, svlen);
		1508	UV len = SvUV (length);
		1509
		1510	if (offset < 0)
		1511	offset += svlen;
		1512
		1513	if (offset < 0 || offset > svlen)
		1514	croak ("offset outside of scalar");
		1515
		1516	if (!SvOK (length) || len + offset > svlen)
		1517	len = svlen - offset;
		1518
		1519	{
		1520	dREQ;
		1521
		1522	req->type = EIO_MLOCK;
		1523	req->sv2 = SvREFCNT_inc (data);
		1524	req->ptr2 = (char *)svptr + offset;
		1525	req->size = len;
		1526
		1527	REQ_SEND;
		1528	}
		1529	}
		1530
		1531	void
		1532	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1533	PPCODE:
		1534	{
		1535	dREQ;
		1536
		1537	req->type = EIO_MLOCKALL;
		1538	req->int1 = flags;
		1539
		1540	REQ_SEND;
		1541	}
		1542
		1543	void
		1544	aio_busy (double delay, SV *callback=&PL_sv_undef)
1446	PPCODE:	1545	PPCODE:
1447	{	1546	{
1448	dREQ;	1547	dREQ;
1449		1548
1450	req->type = REQ_MKNOD;	1549	req->type = EIO_BUSY;
1451	req->data = newSVsv (pathname);	1550	req->nv1 = delay < 0. ? 0. : delay;
1452	req->dataptr = SvPVbyte_nolen (req->data);	1551
1453	req->mode = (mode_t)mode;
1454	req->offset = dev;
1455
1456	REQ_SEND;	1552	REQ_SEND;
1457	}	1553	}
1458		1554
1459	void	1555	void
1460	aio_busy (delay,callback=&PL_sv_undef)	1556	aio_group (SV *callback=&PL_sv_undef)
1461	double delay	1557	PPCODE:
1462	SV * callback	1558	{
		1559	dREQ;
		1560
		1561	req->type = EIO_GROUP;
		1562
		1563	req_submit (req);
		1564	XPUSHs (req_sv (req, aio_grp_stash));
		1565	}
		1566
		1567	void
		1568	aio_nop (SV *callback=&PL_sv_undef)
		1569	ALIAS:
		1570	aio_nop = EIO_NOP
		1571	aio_sync = EIO_SYNC
1463	PPCODE:	1572	PPCODE:
1464	{	1573	{
1465	dREQ;	1574	dREQ;
1466		1575
1467	req->type = REQ_BUSY;
1468	req->fd = delay < 0. ? 0 : delay;
1469	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1470
1471	REQ_SEND;
1472	}
1473
1474	void
1475	aio_group (callback=&PL_sv_undef)
1476	SV * callback
1477	PROTOTYPE: ;$
1478	PPCODE:
1479	{
1480	dREQ;
1481
1482	req->type = REQ_GROUP;
1483	req_send (req);
1484
1485	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1486	}
1487
1488	void
1489	aio_nop (callback=&PL_sv_undef)
1490	SV * callback
1491	PPCODE:
1492	{
1493	dREQ;
1494
1495	req->type = REQ_NOP;	1576	req->type = ix;
1496		1577
1497	REQ_SEND;	1578	REQ_SEND;
1498	}	1579	}
1499		1580
1500	int	1581	int
1501	aioreq_pri (int pri = 0)	1582	aioreq_pri (int pri = 0)
1502	PROTOTYPE: ;$
1503	CODE:	1583	CODE:
1504	RETVAL = next_pri - PRI_BIAS;	1584	RETVAL = next_pri;
1505	if (items > 0)	1585	if (items > 0)
1506	{	1586	{
1507	if (pri < PRI_MIN) pri = PRI_MIN;	1587	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1508	if (pri > PRI_MAX) pri = PRI_MAX;	1588	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1509	next_pri = pri + PRI_BIAS;	1589	next_pri = pri;
1510	}	1590	}
1511	OUTPUT:	1591	OUTPUT:
1512	RETVAL	1592	RETVAL
1513		1593
1514	void	1594	void
1515	aioreq_nice (int nice = 0)	1595	aioreq_nice (int nice = 0)
1516	CODE:	1596	CODE:
1517	nice = next_pri - nice;	1597	nice = next_pri - nice;
1518	if (nice < PRI_MIN) nice = PRI_MIN;	1598	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1519	if (nice > PRI_MAX) nice = PRI_MAX;	1599	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1520	next_pri = nice + PRI_BIAS;	1600	next_pri = nice;
1521		1601
1522	void	1602	void
1523	flush ()	1603	flush ()
		1604	CODE:
		1605	while (eio_nreqs ())
		1606	{
		1607	poll_wait ();
		1608	poll_cb ();
		1609	}
		1610
		1611	int
		1612	poll ()
		1613	CODE:
		1614	poll_wait ();
		1615	RETVAL = poll_cb ();
		1616	OUTPUT:
		1617	RETVAL
		1618
		1619	int
		1620	poll_fileno ()
		1621	CODE:
		1622	RETVAL = s_epipe_fd (&respipe);
		1623	OUTPUT:
		1624	RETVAL
		1625
		1626	int
		1627	poll_cb (...)
1524	PROTOTYPE:	1628	PROTOTYPE:
1525	CODE:	1629	CODE:
1526	while (nreqs)
1527	{
1528	poll_wait ();
1529	poll_cb (0);	1630	RETVAL = poll_cb ();
1530	}
1531
1532	void
1533	poll()
1534	PROTOTYPE:
1535	CODE:
1536	if (nreqs)
1537	{
1538	poll_wait ();
1539	poll_cb (0);
1540	}
1541
1542	int
1543	poll_fileno()
1544	PROTOTYPE:
1545	CODE:
1546	RETVAL = respipe [0];
1547	OUTPUT:	1631	OUTPUT:
1548	RETVAL	1632	RETVAL
1549		1633
		1634	void
		1635	poll_wait ()
		1636	CODE:
		1637	poll_wait ();
		1638
1550	int	1639	int
1551	poll_cb(...)	1640	nreqs ()
1552	PROTOTYPE:
1553	CODE:	1641	CODE:
1554	RETVAL = poll_cb (0);	1642	RETVAL = eio_nreqs ();
1555	OUTPUT:	1643	OUTPUT:
1556	RETVAL	1644	RETVAL
1557		1645
1558	int	1646	int
1559	poll_some(int max = 0)	1647	nready ()
1560	PROTOTYPE: $
1561	CODE:	1648	CODE:
1562	RETVAL = poll_cb (max);	1649	RETVAL = eio_nready ();
1563	OUTPUT:	1650	OUTPUT:
1564	RETVAL	1651	RETVAL
1565		1652
1566	void	1653	int
1567	poll_wait()	1654	npending ()
1568	PROTOTYPE:
1569	CODE:	1655	CODE:
1570	if (nreqs)	1656	RETVAL = eio_npending ();
1571	poll_wait ();
1572
1573	int
1574	nreqs()
1575	PROTOTYPE:
1576	CODE:
1577	RETVAL = nreqs;
1578	OUTPUT:	1657	OUTPUT:
1579	RETVAL	1658	RETVAL
1580		1659
1581	int	1660	int
1582	nready()	1661	nthreads ()
1583	PROTOTYPE:
1584	CODE:	1662	CODE:
1585	RETVAL = get_nready ();	1663	RETVAL = eio_nthreads ();
1586	OUTPUT:	1664	OUTPUT:
1587	RETVAL	1665	RETVAL
1588		1666
1589	int	1667	int
1590	npending()	1668	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1591	PROTOTYPE:	1669	CODE:
		1670	RETVAL = posix_fadvise (fh, offset, length, advice);
		1671	OUTPUT:
		1672	RETVAL
		1673
		1674	IV
		1675	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1676	CODE:
		1677	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	void
		1682	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1683	PPCODE:
		1684	sv_unmagic (scalar, MMAP_MAGIC);
		1685	{
		1686	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1687	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1688	if (addr == (void *)-1)
		1689	XSRETURN_NO;
		1690
		1691	sv_force_normal (scalar);
		1692
		1693	/* we store the length in mg_obj, as namlen is I32 :/ */
		1694	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1695	->mg_obj = (SV *)length;
		1696
		1697	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1698
		1699	if (!(prot & PROT_WRITE))
		1700	SvREADONLY_on (scalar);
		1701
		1702	if (SvLEN (scalar))
		1703	Safefree (SvPVX (scalar));
		1704
		1705	SvPVX (scalar) = (char *)addr;
		1706	SvCUR_set (scalar, length);
		1707	SvLEN_set (scalar, 0);
		1708	SvPOK_only (scalar);
		1709
		1710	XSRETURN_YES;
		1711	}
		1712
		1713	void
		1714	munmap (SV *scalar)
1592	CODE:	1715	CODE:
1593	RETVAL = get_npending ();	1716	sv_unmagic (scalar, MMAP_MAGIC);
		1717
		1718	int
		1719	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1720	ALIAS:
		1721	mprotect = 1
		1722	CODE:
		1723	{
		1724	STRLEN svlen;
		1725	void *addr = SvPVbyte (scalar, svlen);
		1726	size_t len = SvUV (length);
		1727
		1728	if (offset < 0)
		1729	offset += svlen;
		1730
		1731	if (offset < 0 || offset > svlen)
		1732	croak ("offset outside of scalar");
		1733
		1734	if (!SvOK (length) || len + offset > svlen)
		1735	len = svlen - offset;
		1736
		1737	addr = (void *)(((intptr_t)addr) + offset);
		1738	eio_page_align (&addr, &len);
		1739
		1740	switch (ix)
		1741	{
		1742	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1743	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1744	}
		1745	}
1594	OUTPUT:	1746	OUTPUT:
1595	RETVAL	1747	RETVAL
		1748
		1749	int
		1750	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1751	CODE:
		1752	{
		1753	STRLEN svlen;
		1754	void *addr = SvPVbyte (scalar, svlen);
		1755	size_t len = SvUV (length);
		1756
		1757	if (offset < 0)
		1758	offset += svlen;
		1759
		1760	if (offset < 0 || offset > svlen)
		1761	croak ("offset outside of scalar");
		1762
		1763	if (!SvOK (length) || len + offset > svlen)
		1764	len = svlen - offset;
		1765
		1766	addr = (void *)(((intptr_t)addr) + offset);
		1767	eio_page_align (&addr, &len);
		1768	#if _POSIX_MEMLOCK_RANGE
		1769	RETVAL = munlock (addr, len);
		1770	#else
		1771	RETVAL = ((errno = ENOSYS), -1);
		1772	#endif
		1773	}
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	int
		1778	munlockall ()
		1779	CODE:
		1780	#if _POSIX_MEMLOCK
		1781	munlockall ();
		1782	#else
		1783	RETVAL = -1;
		1784	errno = ENOSYS;
		1785	#endif
		1786	OUTPUT:
		1787	RETVAL
		1788
		1789	void _on_next_submit (SV *cb)
		1790	CODE:
		1791	SvREFCNT_dec (on_next_submit);
		1792	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1596		1793
1597	PROTOTYPES: DISABLE	1794	PROTOTYPES: DISABLE
		1795
		1796	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1797
		1798	BOOT:
		1799	{
		1800	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1801	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1802	}
		1803
		1804	void
		1805	DESTROY (SV *self)
		1806	CODE:
		1807	{
		1808	aio_wd wd = SvAIO_WD (self);
		1809	#if HAVE_AT
		1810	{
		1811	SV *callback = &PL_sv_undef;
		1812	dREQ; /* clobbers next_pri :/ */
		1813	next_pri = req->pri; /* restore next_pri */
		1814	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1815	req->type = EIO_WD_CLOSE;
		1816	req->wd = wd;
		1817	REQ_SEND;
		1818	}
		1819	#else
		1820	eio_wd_close_sync (wd);
		1821	#endif
		1822	}
1598		1823
1599	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1824	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1600		1825
1601	void	1826	void
1602	cancel (aio_req_ornot req)	1827	cancel (aio_req_ornot req)
1603	CODE:	1828	CODE:
1604	req_cancel (req);	1829	eio_cancel (req);
1605		1830
1606	void	1831	void
1607	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1832	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1608	CODE:	1833	PPCODE:
		1834	{
		1835	if (GIMME_V != G_VOID)
		1836	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1837
		1838	if (items > 1)
		1839	{
		1840	SV *cb_cv =get_cb (callback);
		1841
1609	SvREFCNT_dec (req->callback);	1842	SvREFCNT_dec (req->callback);
1610	req->callback = newSVsv (callback);	1843	req->callback = SvREFCNT_inc (cb_cv);
		1844	}
		1845	}
1611		1846
1612	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1847	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1613		1848
1614	void	1849	void
1615	add (aio_req grp, ...)	1850	add (aio_req grp, ...)
1616	PPCODE:	1851	PPCODE:
1617	{	1852	{
1618	int i;	1853	int i;
1619	aio_req req;
1620		1854
1621	if (grp->fd == 2)	1855	if (grp->int1 == 2)
1622	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1856	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1623		1857
1624	for (i = 1; i < items; ++i )	1858	for (i = 1; i < items; ++i )
1625	{	1859	{
		1860	aio_req req;
		1861
1626	if (GIMME_V != G_VOID)	1862	if (GIMME_V != G_VOID)
1627	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1863	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1628		1864
1629	req = SvAIO_REQ (ST (i));	1865	req = SvAIO_REQ (ST (i));
1630		1866
1631	if (req)	1867	if (req)
1632	{	1868	eio_grp_add (grp, req);
1633	++grp->length;
1634	req->grp = grp;
1635
1636	req->grp_prev = 0;
1637	req->grp_next = grp->grp_first;
1638
1639	if (grp->grp_first)
1640	grp->grp_first->grp_prev = req;
1641
1642	grp->grp_first = req;
1643	}
1644	}	1869	}
1645	}	1870	}
1646		1871
1647	void	1872	void
1648	cancel_subs (aio_req_ornot req)	1873	cancel_subs (aio_req_ornot req)
…		…
1657	AV *av;	1882	AV *av;
1658		1883
1659	grp->errorno = errno;	1884	grp->errorno = errno;
1660		1885
1661	av = newAV ();	1886	av = newAV ();
		1887	av_extend (av, items - 1);
1662		1888
1663	for (i = 1; i < items; ++i )	1889	for (i = 1; i < items; ++i )
1664	av_push (av, newSVsv (ST (i)));	1890	av_push (av, newSVsv (ST (i)));
1665		1891
1666	SvREFCNT_dec (grp->data);	1892	SvREFCNT_dec (grp->sv1);
1667	grp->data = (SV *)av;	1893	grp->sv1 = (SV *)av;
1668	}	1894	}
1669		1895
1670	void	1896	void
1671	errno (aio_req grp, int errorno = errno)	1897	errno (aio_req grp, int errorno = errno)
1672	CODE:	1898	CODE:
1673	grp->errorno = errorno;	1899	grp->errorno = errorno;
1674		1900
1675	void	1901	void
1676	limit (aio_req grp, int limit)	1902	limit (aio_req grp, int limit)
1677	CODE:	1903	CODE:
1678	grp->fd2 = limit;	1904	eio_grp_limit (grp, limit);
1679	aio_grp_feed (grp);
1680		1905
1681	void	1906	void
1682	feed (aio_req grp, SV *callback=&PL_sv_undef)	1907	feed (aio_req grp, SV *callback=&PL_sv_undef)
1683	CODE:	1908	CODE:
1684	{	1909	{
1685	SvREFCNT_dec (grp->fh2);	1910	SvREFCNT_dec (grp->sv2);
1686	grp->fh2 = newSVsv (callback);	1911	grp->sv2 = newSVsv (callback);
		1912	grp->feed = aio_grp_feed;
1687		1913
1688	if (grp->fd2 <= 0)	1914	if (grp->int2 <= 0)
1689	grp->fd2 = 2;	1915	grp->int2 = 2;
1690		1916
1691	aio_grp_feed (grp);	1917	eio_grp_limit (grp, grp->int2);
1692	}	1918	}
1693		1919

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