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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 UTC vs.
Revision 1.180 by root, Fri Feb 11 00:05:17 2011 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
13	#include <sys/types.h>	14	#include <sys/types.h>
14	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
15	#include <limits.h>	17	#include <limits.h>
16	#include <unistd.h>
17	#include <fcntl.h>	18	#include <fcntl.h>
18	#include <signal.h>
19	#include <sched.h>	19	#include <sched.h>
20		20
21	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
22	# if __linux
23	# include <sys/sendfile.h>	22	# include <sys/mman.h>
24	# elif __freebsd	23	#endif
25	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
26	# include <sys/uio.h>	68	# include <sys/time.h>
27	# elif __hpux
28	# include <sys/socket.h>
29	# elif __solaris /* not yet */
30	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	#ifndef POSIX_FADV_NORMAL
		127	# define POSIX_FADV_NORMAL 0
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if !HAVE_POSIX_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	#endif
		152	#ifndef POSIX_MADV_SEQUENTIAL
		153	# define POSIX_MADV_SEQUENTIAL 0
		154	#endif
		155	#ifndef POSIX_MADV_RANDOM
		156	# define POSIX_MADV_RANDOM 0
		157	#endif
		158	#ifndef POSIX_MADV_WILLNEED
		159	# define POSIX_MADV_WILLNEED 0
		160	#endif
		161	#ifndef POSIX_MADV_DONTNEED
		162	# define POSIX_MADV_DONTNEED 0
		163	#endif
		164
		165	#if !HAVE_POSIX_MADVISE
		166	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		167	#endif
		168
		169	#ifndef PROT_NONE
		170	# define PROT_NONE 0
		171	#endif
		172	#ifndef PROT_READ
		173	# define PROT_READ 0
		174	#endif
		175	#ifndef PROT_WRITE
		176	# define PROT_READ 0
		177	#endif
		178	#ifndef PROT_EXEC
		179	# define PROT_EXEC 0
		180	#endif
		181
		182	#ifndef ST_NODEV
		183	# define ST_NODEV 0
		184	#endif
		185	#ifndef ST_NOEXEC
		186	# define ST_NOEXEC 0
		187	#endif
		188	#ifndef ST_SYNCHRONOUS
		189	# define ST_SYNCHRONOUS 0
		190	#endif
		191	#ifndef ST_MANDLOCK
		192	# define ST_MANDLOCK 0
		193	#endif
		194	#ifndef ST_WRITE
		195	# define ST_WRITE 0
		196	#endif
		197	#ifndef ST_APPEND
		198	# define ST_APPEND 0
		199	#endif
		200	#ifndef ST_IMMUTABLE
		201	# define ST_IMMUTABLE 0
		202	#endif
		203	#ifndef ST_NOATIME
		204	# define ST_NOATIME 0
		205	#endif
		206	#ifndef ST_NODIRATIME
		207	# define ST_NODIRATIME 0
		208	#endif
		209	#ifndef ST_RELATIME
		210	# define ST_RELATIME 0
		211	#endif
		212
		213	#ifndef S_IFIFO
		214	# define S_IFIFO 0
		215	#endif
		216	#ifndef S_IFCHR
		217	# define S_IFCHR 0
		218	#endif
		219	#ifndef S_IFBLK
		220	# define S_IFBLK 0
		221	#endif
		222	#ifndef S_IFLNK
		223	# define S_IFLNK 0
		224	#endif
		225	#ifndef S_IFREG
		226	# define S_IFREG 0
		227	#endif
		228	#ifndef S_IFDIR
		229	# define S_IFDIR 0
		230	#endif
		231	#ifndef S_IFWHT
		232	# define S_IFWHT 0
		233	#endif
		234	#ifndef S_IFSOCK
		235	# define S_IFSOCK 0
		236	#endif
		237
		238	#ifndef MAP_ANONYMOUS
		239	# ifdef MAP_ANON
		240	# define MAP_ANONYMOUS MAP_ANON
31	# else	241	# else
32	# error sendfile support requested but not available	242	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
33	# endif	243	# endif
34	#endif	244	#endif
35		245	#ifndef MAP_HUGETLB
36	#if __ia64	246	# define MAP_HUGETLB 0
37	# define STACKSIZE 65536
38	#else
39	# define STACKSIZE 8192
40	#endif	247	#endif
		248	#ifndef MAP_LOCKED
		249	# define MAP_LOCKED 0
		250	#endif
		251	#ifndef MAP_NORESERVE
		252	# define MAP_NORESERVE 0
		253	#endif
		254	#ifndef MAP_POPULATE
		255	# define MAP_POPULATE 0
		256	#endif
		257	#ifndef MAP_NONBLOCK
		258	# define MAP_NONBLOCK 0
		259	#endif
		260
		261	#ifndef makedev
		262	# define makedev(maj,min) (((maj) << 8) | (min))
		263	#endif
		264	#ifndef major
		265	# define major(dev) ((dev) >> 8)
		266	#endif
		267	#ifndef minor
		268	# define minor(dev) ((dev) & 0xff)
		269	#endif
		270
		271	#ifndef PAGESIZE
		272	# define PAGESIZE sysconf (_SC_PAGESIZE)
		273	#endif
		274
		275	static int req_invoke (eio_req *req);
		276	#define EIO_FINISH(req) req_invoke (req)
		277	static void req_destroy (eio_req *grp);
		278	#define EIO_DESTROY(req) req_destroy (req)
41		279
42	enum {	280	enum {
43	REQ_QUIT,	281	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
44	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,
50	REQ_READDIR,
51	REQ_SYMLINK,
52	};	282	};
53		283
54	typedef struct aio_cb {	284	#include "libeio/eio.c"
55	struct aio_cb *volatile next;
56		285
57	int type;
58
59	/* should receive a cleanup, with unions */
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70
71	Stat_t *statdata;
72	} aio_cb;
73
74	typedef aio_cb *aio_req;	286	typedef eio_req *aio_req;
		287	typedef eio_req *aio_req_ornot;
75		288
76	static int started, wanted;	289	static SV *on_next_submit;
77	static volatile int nreqs;	290	static int next_pri = EIO_PRI_DEFAULT;
78	static int max_outstanding = 1<<30;	291	static int max_outstanding;
79	static int respipe [2];
80		292
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	293	static s_epipe respipe;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		294
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	295	static void req_destroy (aio_req req);
86	static volatile aio_req ress, rese; /* queue start, queue end */
87
88	static void free_req (aio_req req)	296	static void req_cancel (aio_req req);
89	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92		297
		298	static void want_poll (void)
		299	{
		300	/* write a dummy byte to the pipe so fh becomes ready */
		301	s_epipe_signal (&respipe);
		302	}
		303
		304	static void done_poll (void)
		305	{
		306	/* read any signals sent by the worker threads */
		307	s_epipe_drain (&respipe);
		308	}
		309
		310	/* must be called at most once */
		311	static SV *req_sv (aio_req req, HV *stash)
		312	{
93	if (req->fh)	313	if (!req->self)
94	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);
104
105	if (req->type == REQ_READDIR && req->result >= 0)
106	free (req->data2ptr);
107
108	Safefree (req);
109	}
110
111	static void
112	poll_wait ()
113	{
114	if (nreqs && !ress)
115	{	314	{
116	fd_set rfd;	315	req->self = (SV *)newHV ();
117	FD_ZERO(&rfd);	316	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
118	FD_SET(respipe [0], &rfd);
119
120	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	317	}
122	}
123		318
124	static int	319	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
125	poll_cb ()	320	}
126	{
127	dSP;
128	int count = 0;
129	int do_croak = 0;
130	aio_req req;
131		321
132	for (;;)	322	static aio_req SvAIO_REQ (SV *sv)
		323	{
		324	MAGIC *mg;
		325
		326	if (!SvROK (sv)
		327	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		328	&& SvSTASH (SvRV (sv)) != aio_req_stash
		329	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		330	croak ("object of class IO::AIO::REQ expected");
		331
		332	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		333
		334	return mg ? (aio_req)mg->mg_ptr : 0;
		335	}
		336
		337	static void aio_grp_feed (aio_req grp)
		338	{
		339	if (grp->sv2 && SvOK (grp->sv2))
133	{	340	{
134	pthread_mutex_lock (&reslock);	341	dSP;
135	req = ress;
136		342
137	if (req)	343	ENTER;
		344	SAVETMPS;
		345	PUSHMARK (SP);
		346	XPUSHs (req_sv (grp, aio_grp_stash));
		347	PUTBACK;
		348	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		349	SPAGAIN;
		350	FREETMPS;
		351	LEAVE;
		352	}
		353	}
		354
		355	static void req_submit (eio_req *req)
		356	{
		357	eio_submit (req);
		358
		359	if (expect_false (on_next_submit))
		360	{
		361	dSP;
		362	SV *cb = sv_2mortal (on_next_submit);
		363
		364	on_next_submit = 0;
		365
		366	PUSHMARK (SP);
		367	PUTBACK;
		368	call_sv (cb, G_DISCARD | G_EVAL);
		369	}
		370	}
		371
		372	static int req_invoke (eio_req *req)
		373	{
		374	if (req->flags & FLAG_SV2_RO_OFF)
		375	SvREADONLY_off (req->sv2);
		376
		377	if (!EIO_CANCELLED (req) && req->callback)
		378	{
		379	dSP;
		380	static SV *sv_result_cache; /* caches the result integer SV */
		381	SV *sv_result;
		382
		383	ENTER;
		384	SAVETMPS;
		385	PUSHMARK (SP);
		386	EXTEND (SP, 1);
		387
		388	/* do not recreate the result IV from scratch each time */
		389	if (expect_true (sv_result_cache))
138	{	390	{
139	ress = req->next;	391	sv_result = sv_result_cache; sv_result_cache = 0;
140		392	SvIV_set (sv_result, req->result);
141	if (!ress)	393	SvIOK_only (sv_result);
142	{
143	/* read any signals sent by the worker threads */
144	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)
146	;
147
148	rese = 0;
149	}
150	}
151
152	pthread_mutex_unlock (&reslock);
153
154	if (!req)
155	break;
156
157	nreqs--;
158
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
175	PL_laststatval = req->result;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}
205	else
206	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)
210	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);
235	}
236	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}
243
244	free_req (req);
245	}
246
247	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}
342
343	static void create_pipe ()
344	{
345	if (pipe (respipe))
346	croak ("unable to initialize result pipe");
347
348	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349	croak ("cannot set result pipe to nonblocking mode");
350
351	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352	croak ("cannot set result pipe to nonblocking mode");
353	}
354
355	/*****************************************************************************/
356	/* work around various missing functions */
357
358	#if !HAVE_PREADWRITE
359	# define pread aio_pread
360	# define pwrite aio_pwrite
361
362	/*
363	* make our pread/pwrite safe against themselves, but not against
364	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.
366	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369	static ssize_t
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{
372	ssize_t res;
373	off_t ooffset;
374
375	pthread_mutex_lock (&preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);
381
382	return res;
383	}
384
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)
387	{
388	ssize_t res;
389	off_t ooffset;
390
391	pthread_mutex_lock (&preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);
397
398	return res;
399	}
400	#endif
401
402	#if !HAVE_FDATASYNC
403	# define fdatasync fsync
404	#endif
405
406	#if !HAVE_READAHEAD
407	# define readahead aio_readahead
408
409	static ssize_t
410	readahead (int fd, off_t offset, size_t count)
411	{
412	char readahead_buf[4096];
413
414	while (count > 0)
415	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418	pread (fd, readahead_buf, len, offset);
419	offset += len;
420	count -= len;
421	}
422
423	errno = 0;
424	}
425	#endif
426
427	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r
429
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{
435	struct dirent *e;
436	int errorno;
437
438	pthread_mutex_lock (&readdirlock);
439
440	e = readdir (dirp);
441	errorno = errno;
442
443	if (e)
444	{
445	*res = ent;
446	strcpy (ent->d_name, e->d_name);
447	}
448	else
449	*res = 0;
450
451	pthread_mutex_unlock (&readdirlock);
452
453	errno = errorno;
454	return e ? 0 : -1;
455	}
456	#endif
457
458	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461	{
462	ssize_t res;
463
464	if (!count)
465	return 0;
466
467	#if HAVE_SENDFILE
468	# if __linux
469	res = sendfile (ofd, ifd, &offset, count);
470
471	# elif __freebsd
472	/*
473	* Of course, the freebsd sendfile is a dire hack with no thoughts
474	* wasted on making it similar to other I/O functions.
475	*/
476	{
477	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482	res = sbytes;
483	}
484
485	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488	# elif __solaris
489	{
490	struct sendfilevec vec;
491	size_t sbytes;
492
493	vec.sfv_fd = ifd;
494	vec.sfv_flag = 0;
495	vec.sfv_off = offset;
496	vec.sfv_len = count;
497
498	res = sendfilev (ofd, &vec, 1, &sbytes);
499
500	if (res < 0 && sbytes)
501	res = sbytes;
502	}
503
504	# else
505	res = -1;
506	errno = ENOSYS;
507	# endif
508	#endif
509
510	if (res < 0
511	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512	#if __solaris
513	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
514	#endif
515	)
516	)
517	{
518	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];
520	res = 0;
521
522	for (;;)
523	{
524	ssize_t cnt;
525
526	cnt = pread (ifd, buf, 4096, offset);
527
528	if (cnt <= 0)
529	{
530	if (cnt && !res) res = -1;
531	break;
532	}
533
534	cnt = write (ofd, buf, cnt);
535
536	if (cnt <= 0)
537	{
538	if (cnt && !res) res = -1;
539	break;
540	}
541
542	offset += cnt;
543	res += cnt;
544	}
545	}
546
547	return res;
548	}
549
550	/* read a full directory */
551	static int
552	scandir_ (const char *path, void **namesp)
553	{
554	DIR *dirp = opendir (path);
555	union
556	{
557	struct dirent d;
558	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
559	} u;
560	struct dirent *entp;
561	char *name, *names;
562	int memlen = 4096;
563	int memofs = 0;
564	int res = 0;
565	int errorno;
566
567	if (!dirp)
568	return -1;
569
570	names = malloc (memlen);
571
572	for (;;)
573	{
574	errno = 0, readdir_r (dirp, &u.d, &entp);
575
576	if (!entp)
577	break;
578
579	name = entp->d_name;
580
581	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
582	{
583	int len = strlen (name) + 1;
584
585	res++;
586
587	while (memofs + len > memlen)
588	{
589	memlen *= 2;
590	names = realloc (names, memlen);
591	if (!names)
592	break;
593	}
594
595	memcpy (names + memofs, name, len);
596	memofs += len;
597	}
598	}
599
600	errorno = errno;
601	closedir (dirp);
602
603	if (errorno)
604	{
605	free (names);
606	errno = errorno;
607	res = -1;
608	}
609
610	*namesp = (void *)names;
611	return res;
612	}
613
614	/*****************************************************************************/
615
616	static void *
617	aio_proc (void *thr_arg)
618	{
619	aio_req req;
620	int type;
621
622	do
623	{
624	pthread_mutex_lock (&reqlock);
625
626	for (;;)
627	{
628	req = reqs;
629
630	if (reqs)
631	{
632	reqs = reqs->next;
633	if (!reqs) reqe = 0;
634	}
635
636	if (req)
637	break;
638
639	pthread_cond_wait (&reqwait, &reqlock);
640	}
641
642	pthread_mutex_unlock (&reqlock);
643
644	errno = 0; /* strictly unnecessary */
645
646	type = req->type;
647
648	switch (type)
649	{
650	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
651	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
652
653	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
654	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
655
656	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
657	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
658	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
659
660	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
661	case REQ_CLOSE: req->result = close (req->fd); break;
662	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
663	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
664	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
665
666	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
667	case REQ_FSYNC: req->result = fsync (req->fd); break;
668	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
669
670	case REQ_QUIT:
671	break;
672
673	default:
674	req->result = ENOSYS;
675	break;
676	}
677
678	req->errorno = errno;
679
680	pthread_mutex_lock (&reslock);
681
682	req->next = 0;
683
684	if (rese)
685	{
686	rese->next = req;
687	rese = req;
688	}	394	}
689	else	395	else
690	{	396	{
691	rese = ress = req;	397	sv_result = newSViv (req->result);
692		398	SvREADONLY_on (sv_result);
693	/* write a dummy byte to the pipe so fh becomes ready */
694	write (respipe [1], &respipe, 1);
695	}	399	}
696		400
697	pthread_mutex_unlock (&reslock);	401	switch (req->type)
		402	{
		403	case EIO_READDIR:
		404	{
		405	SV *rv = &PL_sv_undef;
		406
		407	if (req->result >= 0)
		408	{
		409	int i;
		410	char *names = (char *)req->ptr2;
		411	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		412	AV *av = newAV ();
		413
		414	av_extend (av, req->result - 1);
		415
		416	for (i = 0; i < req->result; ++i)
		417	{
		418	if (req->int1 & EIO_READDIR_DENTS)
		419	{
		420	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		421
		422	if (req->int1 & EIO_READDIR_CUSTOM2)
		423	{
		424	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		425	AV *avent = newAV ();
		426
		427	av_extend (avent, 2);
		428
		429	if (!sv_type [ent->type])
		430	{
		431	sv_type [ent->type] = newSViv (ent->type);
		432	SvREADONLY_on (sv_type [ent->type]);
		433	}
		434
		435	av_store (avent, 0, namesv);
		436	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		437	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		438
		439	av_store (av, i, newRV_noinc ((SV *)avent));
		440	}
		441	else
		442	av_store (av, i, namesv);
		443
		444	++ent;
		445	}
		446	else
		447	{
		448	SV *name = newSVpv (names, 0);
		449	av_store (av, i, name);
		450	names += SvCUR (name) + 1;
		451	}
		452	}
		453
		454	rv = sv_2mortal (newRV_noinc ((SV *)av));
		455	}
		456
		457	PUSHs (rv);
		458
		459	if (req->int1 & EIO_READDIR_CUSTOM1)
		460	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		461	}
		462	break;
		463
		464	case EIO_OPEN:
		465	{
		466	/* convert fd to fh */
		467	SV *fh = &PL_sv_undef;
		468
		469	if (req->result >= 0)
		470	{
		471	GV *gv = (GV *)sv_newmortal ();
		472	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		473	char sym [64];
		474	int symlen;
		475
		476	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		477	gv_init (gv, aio_stash, sym, symlen, 0);
		478
		479	symlen = snprintf (
		480	sym,
		481	sizeof (sym),
		482	"%s&=%d",
		483	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		484	(int)req->result
		485	);
		486
		487	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		488	fh = (SV *)gv;
		489	}
		490
		491	PUSHs (fh);
		492	}
		493	break;
		494
		495	case EIO_STATVFS:
		496	case EIO_FSTATVFS:
		497	{
		498	SV *rv = &PL_sv_undef;
		499
		500	if (req->result >= 0)
		501	{
		502	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		503	HV *hv = newHV ();
		504
		505	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		506
		507	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		508	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		509	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		510	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		511	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		512	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		513	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		514	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		515	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		516	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		517	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		518	}
		519
		520	PUSHs (rv);
		521	}
		522
		523	break;
		524
		525	case EIO_GROUP:
		526	req->int1 = 2; /* mark group as finished */
		527
		528	if (req->sv1)
		529	{
		530	int i;
		531	AV *av = (AV *)req->sv1;
		532
		533	EXTEND (SP, AvFILL (av) + 1);
		534	for (i = 0; i <= AvFILL (av); ++i)
		535	PUSHs (*av_fetch (av, i, 0));
		536	}
		537	break;
		538
		539	case EIO_NOP:
		540	case EIO_BUSY:
		541	break;
		542
		543	case EIO_READLINK:
		544	if (req->result > 0)
		545	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		546	break;
		547
		548	case EIO_STAT:
		549	case EIO_LSTAT:
		550	case EIO_FSTAT:
		551	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		552	PL_laststatval = req->result;
		553	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		554	PUSHs (sv_result);
		555	break;
		556
		557	case EIO_READ:
		558	{
		559	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		560	*SvEND (req->sv2) = 0;
		561	SvPOK_only (req->sv2);
		562	SvSETMAGIC (req->sv2);
		563	PUSHs (sv_result);
		564	}
		565	break;
		566
		567	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		568	if (req->result > 0)
		569	SvIV_set (sv_result, 0);
		570	/* FALLTHROUGH */
		571
		572	default:
		573	PUSHs (sv_result);
		574	break;
		575	}
		576
		577	errno = req->errorno;
		578
		579	PUTBACK;
		580	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		581	SPAGAIN;
		582
		583	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		584	SvREFCNT_dec (sv_result);
		585	else
		586	sv_result_cache = sv_result;
		587
		588	FREETMPS;
		589	LEAVE;
		590
		591	PUTBACK;
698	}	592	}
699	while (type != REQ_QUIT);	593
		594	return !!SvTRUE (ERRSV);
		595	}
		596
		597	static void req_destroy (aio_req req)
		598	{
		599	if (req->self)
		600	{
		601	sv_unmagic (req->self, PERL_MAGIC_ext);
		602	SvREFCNT_dec (req->self);
		603	}
		604
		605	SvREFCNT_dec (req->sv1);
		606	SvREFCNT_dec (req->sv2);
		607	SvREFCNT_dec (req->callback);
		608
		609	Safefree (req);
		610	}
		611
		612	static void req_cancel_subs (aio_req grp)
		613	{
		614	aio_req sub;
		615
		616	if (grp->type != EIO_GROUP)
		617	return;
		618
		619	SvREFCNT_dec (grp->sv2);
		620	grp->sv2 = 0;
		621
		622	eio_grp_cancel (grp);
		623	}
		624
		625	static void
		626	create_respipe (void)
		627	{
		628	if (s_epipe_renew (&respipe))
		629	croak ("IO::AIO: unable to initialize result pipe");
		630	}
		631
		632	static void poll_wait (void)
		633	{
		634	while (eio_nreqs ())
		635	{
		636	int size;
		637
		638	X_LOCK (reslock);
		639	size = res_queue.size;
		640	X_UNLOCK (reslock);
		641
		642	if (size)
		643	return;
		644
		645	etp_maybe_start_thread ();
		646
		647	s_epipe_wait (&respipe);
		648	}
		649	}
		650
		651	static int poll_cb (void)
		652	{
		653	for (;;)
		654	{
		655	int res = eio_poll ();
		656
		657	if (res > 0)
		658	croak (0);
		659
		660	if (!max_outstanding || max_outstanding > eio_nreqs ())
		661	return res;
		662
		663	poll_wait ();
		664	}
		665	}
		666
		667	static void atfork_child (void)
		668	{
		669	create_respipe ();
		670	}
		671
		672	/*****************************************************************************/
		673
		674	#if !_POSIX_MAPPED_FILES
		675	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		676	# define munmap(addr,length) (errno = ENOSYS, -1)
		677	#endif
		678
		679	#if !_POSIX_MEMORY_PROTECTION
		680	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		681	# define PROT_NONE 0
		682	# define PROT_WRITE 0
		683	# define MAP_PRIVATE 0
		684	# define MAP_SHARED 0
		685	# define MAP_FIXED 0
		686	#endif
		687
		688	#define MMAP_MAGIC PERL_MAGIC_ext
		689
		690	static int
		691	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		692	{
		693	int old_errno = errno;
		694	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		695	errno = old_errno;
		696
		697	mg->mg_obj = 0; /* just in case */
		698
		699	SvREADONLY_off (sv);
		700
		701	if (SvPVX (sv) != mg->mg_ptr)
		702	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		703
		704	SvCUR_set (sv, 0);
		705	SvPVX (sv) = 0;
		706	SvOK_off (sv);
700		707
701	return 0;	708	return 0;
702	}	709	}
703		710
		711	static MGVTBL mmap_vtbl = {
		712	0, 0, 0, 0, mmap_free
		713	};
		714
704	/*****************************************************************************/	715	/*****************************************************************************/
705		716
706	static void atfork_prepare (void)	717	static SV *
		718	get_cb (SV *cb_sv)
707	{	719	{
708	pthread_mutex_lock (&reqlock);	720	SvGETMAGIC (cb_sv);
709	pthread_mutex_lock (&reslock);	721	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
710	#if !HAVE_PREADWRITE
711	pthread_mutex_lock (&preadwritelock);
712	#endif
713	#if !HAVE_READDIR_R
714	pthread_mutex_lock (&readdirlock);
715	#endif
716	}
717
718	static void atfork_parent (void)
719	{
720	#if !HAVE_READDIR_R
721	pthread_mutex_unlock (&readdirlock);
722	#endif
723	#if !HAVE_PREADWRITE
724	pthread_mutex_unlock (&preadwritelock);
725	#endif
726	pthread_mutex_unlock (&reslock);
727	pthread_mutex_unlock (&reqlock);
728	}
729
730	static void atfork_child (void)
731	{
732	aio_req prv;
733
734	started = 0;
735
736	while (reqs)
737	{
738	prv = reqs;
739	reqs = prv->next;
740	free_req (prv);
741	}
742
743	reqs = reqe = 0;
744
745	while (ress)
746	{
747	prv = ress;
748	ress = prv->next;
749	free_req (prv);
750	}
751
752	ress = rese = 0;
753
754	close (respipe [0]);
755	close (respipe [1]);
756	create_pipe ();
757
758	atfork_parent ();
759	}	722	}
760		723
761	#define dREQ \	724	#define dREQ \
		725	SV *cb_cv; \
762	aio_req req; \	726	aio_req req; \
		727	int req_pri = next_pri; \
		728	next_pri = EIO_PRI_DEFAULT; \
763	\	729	\
764	if (SvOK (callback) && !SvROK (callback)) \	730	cb_cv = get_cb (callback); \
765	croak ("clalback must be undef or of reference type"); \
766	\	731	\
767	Newz (0, req, 1, aio_cb); \	732	Newz (0, req, 1, eio_req); \
768	if (!req) \	733	if (!req) \
769	croak ("out of memory during aio_req allocation"); \	734	croak ("out of memory during eio_req allocation"); \
770	\	735	\
771	req->callback = newSVsv (callback);	736	req->callback = SvREFCNT_inc (cb_cv); \
772		737	req->pri = req_pri
		738
		739	#define REQ_SEND \
		740	PUTBACK; \
		741	req_submit (req); \
		742	SPAGAIN; \
		743	\
		744	if (GIMME_V != G_VOID) \
		745	XPUSHs (req_sv (req, aio_req_stash));
		746
773	MODULE = IO::AIO PACKAGE = IO::AIO	747	MODULE = IO::AIO PACKAGE = IO::AIO
774		748
775	PROTOTYPES: ENABLE	749	PROTOTYPES: ENABLE
776		750
777	BOOT:	751	BOOT:
778	{	752	{
		753	static const struct {
		754	const char *name;
		755	IV iv;
		756	} *civ, const_iv[] = {
		757	# define const_niv(name, value) { # name, (IV) value },
		758	# define const_iv(name) { # name, (IV) name },
		759	# define const_eio(name) { # name, (IV) EIO_ ## name },
		760	const_iv (EXDEV)
		761	const_iv (ENOSYS)
		762	const_iv (O_RDONLY)
		763	const_iv (O_WRONLY)
		764	const_iv (O_RDWR)
		765	const_iv (O_CREAT)
		766	const_iv (O_TRUNC)
		767	const_iv (O_EXCL)
		768	const_iv (O_APPEND)
		769
		770	const_iv (S_IFIFO)
		771	const_iv (S_IFCHR)
		772	const_iv (S_IFBLK)
		773	const_iv (S_IFLNK)
		774	const_iv (S_IFREG)
		775	const_iv (S_IFDIR)
		776	const_iv (S_IFWHT)
		777	const_iv (S_IFSOCK)
		778	const_iv (S_IFMT)
		779
		780	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		781	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		782	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		783	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		784	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		785	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		786
		787	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		788	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		789	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		790	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		791	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		792
		793	const_iv (ST_RDONLY)
		794	const_iv (ST_NOSUID)
		795	const_iv (ST_NODEV)
		796	const_iv (ST_NOEXEC)
		797	const_iv (ST_SYNCHRONOUS)
		798	const_iv (ST_MANDLOCK)
		799	const_iv (ST_WRITE)
		800	const_iv (ST_APPEND)
		801	const_iv (ST_IMMUTABLE)
		802	const_iv (ST_NOATIME)
		803	const_iv (ST_NODIRATIME)
		804	const_iv (ST_RELATIME)
		805
		806	const_iv (PROT_NONE)
		807	const_iv (PROT_EXEC)
		808	const_iv (PROT_READ)
		809	const_iv (PROT_WRITE)
		810
		811	/*const_iv (MAP_FIXED)*/
		812	const_iv (MAP_PRIVATE)
		813	const_iv (MAP_SHARED)
		814	const_iv (MAP_ANONYMOUS)
		815
		816	/* linuxish */
		817	const_iv (MAP_HUGETLB)
		818	const_iv (MAP_LOCKED)
		819	const_iv (MAP_NORESERVE)
		820	const_iv (MAP_POPULATE)
		821	const_iv (MAP_NONBLOCK)
		822
		823	const_eio (MCL_FUTURE)
		824	const_eio (MCL_CURRENT)
		825
		826	const_eio (MS_ASYNC)
		827	const_eio (MS_INVALIDATE)
		828	const_eio (MS_SYNC)
		829
		830	const_eio (MT_MODIFY)
		831
		832	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		833	const_eio (SYNC_FILE_RANGE_WRITE)
		834	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		835
		836	const_eio (READDIR_DENTS)
		837	const_eio (READDIR_DIRS_FIRST)
		838	const_eio (READDIR_STAT_ORDER)
		839	const_eio (READDIR_FOUND_UNKNOWN)
		840
		841	const_eio (DT_UNKNOWN)
		842	const_eio (DT_FIFO)
		843	const_eio (DT_CHR)
		844	const_eio (DT_DIR)
		845	const_eio (DT_BLK)
		846	const_eio (DT_REG)
		847	const_eio (DT_LNK)
		848	const_eio (DT_SOCK)
		849	const_eio (DT_WHT)
		850	};
		851
		852	aio_stash = gv_stashpv ("IO::AIO" , 1);
		853	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		854	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		855
		856	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		857	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		858
		859	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		860
779	create_pipe ();	861	create_respipe ();
780	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
781	}
782		862
		863	if (eio_init (want_poll, done_poll) < 0)
		864	croak ("IO::AIO: unable to initialise eio library");
		865
		866	/* atfork child called in fifo order, so before eio's handler */
		867	X_THREAD_ATFORK (0, 0, atfork_child);
		868	}
		869
783	void	870	void
784	min_parallel(nthreads)	871	max_poll_reqs (int nreqs)
785	int nthreads
786	PROTOTYPE: $	872	PROTOTYPE: $
		873	CODE:
		874	eio_set_max_poll_reqs (nreqs);
787		875
788	void	876	void
789	max_parallel(nthreads)	877	max_poll_time (double nseconds)
790	int nthreads
791	PROTOTYPE: $	878	PROTOTYPE: $
792
793	int
794	max_outstanding(nreqs)
795	int nreqs
796	PROTOTYPE: $
797	CODE:	879	CODE:
798	RETVAL = max_outstanding;	880	eio_set_max_poll_time (nseconds);
		881
		882	void
		883	min_parallel (int nthreads)
		884	PROTOTYPE: $
		885	CODE:
		886	eio_set_min_parallel (nthreads);
		887
		888	void
		889	max_parallel (int nthreads)
		890	PROTOTYPE: $
		891	CODE:
		892	eio_set_max_parallel (nthreads);
		893
		894	void
		895	max_idle (int nthreads)
		896	PROTOTYPE: $
		897	CODE:
		898	eio_set_max_idle (nthreads);
		899
		900	void
		901	max_outstanding (int maxreqs)
		902	PROTOTYPE: $
		903	CODE:
799	max_outstanding = nreqs;	904	max_outstanding = maxreqs;
800		905
801	void	906	void
802	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	907	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
803	SV * pathname
804	int flags
805	int mode
806	SV * callback
807	PROTOTYPE: $$$;$
808	CODE:	908	PPCODE:
809	{	909	{
810	dREQ;	910	dREQ;
811		911
812	req->type = REQ_OPEN;	912	req->type = EIO_OPEN;
813	req->data = newSVsv (pathname);	913	req->sv1 = newSVsv (pathname);
814	req->dataptr = SvPVbyte_nolen (req->data);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
815	req->fd = flags;	915	req->int1 = flags;
816	req->mode = mode;	916	req->int2 = mode;
817		917
818	send_req (req);	918	REQ_SEND;
819	}	919	}
820		920
821	void	921	void
822	aio_close(fh,callback=&PL_sv_undef)	922	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
823	SV * fh
824	SV * callback
825	PROTOTYPE: $;$
826	ALIAS:	923	ALIAS:
827	aio_close = REQ_CLOSE
828	aio_fsync = REQ_FSYNC	924	aio_fsync = EIO_FSYNC
829	aio_fdatasync = REQ_FDATASYNC	925	aio_fdatasync = EIO_FDATASYNC
830	CODE:	926	PPCODE:
831	{	927	{
		928	int fd = s_fileno_croak (fh, 0);
832	dREQ;	929	dREQ;
833		930
834	req->type = ix;	931	req->type = ix;
835	req->fh = newSVsv (fh);	932	req->sv1 = newSVsv (fh);
836	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	933	req->int1 = fd;
837		934
838	send_req (req);	935	REQ_SEND (req);
839	}	936	}
840		937
841	void	938	void
		939	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		940	PPCODE:
		941	{
		942	int fd = s_fileno_croak (fh, 0);
		943	dREQ;
		944
		945	req->type = EIO_SYNC_FILE_RANGE;
		946	req->sv1 = newSVsv (fh);
		947	req->int1 = fd;
		948	req->offs = offset;
		949	req->size = nbytes;
		950	req->int2 = flags;
		951
		952	REQ_SEND (req);
		953	}
		954
		955	void
		956	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		957	PPCODE:
		958	{
		959	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		960	int fd = s_fileno_croak (fh, 0);
		961	dREQ;
		962
		963	if (close_pipe < 0)
		964	{
		965	int pipefd [2];
		966
		967	if (pipe (pipefd) < 0
		968	|| close (pipefd [1]) < 0
		969	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		970	abort (); /*D*/
		971
		972	close_pipe = pipefd [0];
		973	}
		974
		975	req->type = EIO_DUP2;
		976	req->int1 = close_pipe;
		977	req->sv2 = newSVsv (fh);
		978	req->int2 = fd;
		979
		980	REQ_SEND (req);
		981	}
		982
		983	void
842	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	984	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
843	SV * fh
844	UV offset
845	UV length
846	SV * data
847	UV dataoffset
848	SV * callback
849	ALIAS:	985	ALIAS:
850	aio_read = REQ_READ	986	aio_read = EIO_READ
851	aio_write = REQ_WRITE	987	aio_write = EIO_WRITE
852	PROTOTYPE: $$$$$;$
853	CODE:	988	PPCODE:
854	{	989	{
855	aio_req req;
856	STRLEN svlen;	990	STRLEN svlen;
		991	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
857	char *svptr = SvPVbyte (data, svlen);	992	char *svptr = SvPVbyte (data, svlen);
858		993	UV len = SvUV (length);
859	SvUPGRADE (data, SVt_PV);
860	SvPOK_on (data);
861		994
862	if (dataoffset < 0)	995	if (dataoffset < 0)
863	dataoffset += svlen;	996	dataoffset += svlen;
864		997
865	if (dataoffset < 0 || dataoffset > svlen)	998	if (dataoffset < 0 || dataoffset > svlen)
866	croak ("data offset outside of string");	999	croak ("dataoffset outside of data scalar");
867		1000
868	if (ix == REQ_WRITE)	1001	if (ix == EIO_WRITE)
869	{	1002	{
870	/* write: check length and adjust. */	1003	/* write: check length and adjust. */
871	if (length < 0 || length + dataoffset > svlen)	1004	if (!SvOK (length) || len + dataoffset > svlen)
872	length = svlen - dataoffset;	1005	len = svlen - dataoffset;
873	}	1006	}
874	else	1007	else
875	{	1008	{
876	/* read: grow scalar as necessary */	1009	/* read: check type and grow scalar as necessary */
		1010	SvUPGRADE (data, SVt_PV);
877	svptr = SvGROW (data, length + dataoffset);	1011	svptr = SvGROW (data, len + dataoffset + 1);
878	}	1012	}
879
880	if (length < 0)
881	croak ("length must not be negative");
882		1013
883	{	1014	{
884	dREQ;	1015	dREQ;
885		1016
886	req->type = ix;	1017	req->type = ix;
887	req->fh = newSVsv (fh);	1018	req->sv1 = newSVsv (fh);
888	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1019	req->int1 = fd;
889	: IoOFP (sv_2io (fh)));	1020	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
890	req->offset = offset;	1021	req->size = len;
891	req->length = length;
892	req->data = SvREFCNT_inc (data);	1022	req->sv2 = SvREFCNT_inc (data);
893	req->dataptr = (char *)svptr + dataoffset;	1023	req->ptr2 = (char *)svptr + dataoffset;
		1024	req->stroffset = dataoffset;
894		1025
895	if (!SvREADONLY (data))	1026	if (!SvREADONLY (data))
896	{	1027	{
897	SvREADONLY_on (data);	1028	SvREADONLY_on (data);
898	req->data2ptr = (void *)data;	1029	req->flags |= FLAG_SV2_RO_OFF;
899	}	1030	}
900		1031
901	send_req (req);	1032	REQ_SEND;
902	}	1033	}
903	}	1034	}
904		1035
905	void	1036	void
906	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1037	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
907	SV * out_fh
908	SV * in_fh
909	UV in_offset
910	UV length
911	SV * callback
912	PROTOTYPE: $$$$;$
913	CODE:	1038	PPCODE:
914	{	1039	{
		1040	SV *data;
		1041	dREQ;
		1042
		1043	req->type = EIO_READLINK;
		1044	req->sv1 = newSVsv (path);
		1045	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1046
		1047	REQ_SEND;
		1048	}
		1049
		1050	void
		1051	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1052	PPCODE:
		1053	{
		1054	int ifd = s_fileno_croak (in_fh , 0);
		1055	int ofd = s_fileno_croak (out_fh, 1);
915	dREQ;	1056	dREQ;
916		1057
917	req->type = REQ_SENDFILE;	1058	req->type = EIO_SENDFILE;
918	req->fh = newSVsv (out_fh);	1059	req->sv1 = newSVsv (out_fh);
919	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1060	req->int1 = ofd;
920	req->fh2 = newSVsv (in_fh);	1061	req->sv2 = newSVsv (in_fh);
921	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1062	req->int2 = ifd;
922	req->offset = in_offset;	1063	req->offs = in_offset;
923	req->length = length;	1064	req->size = length;
924		1065
925	send_req (req);	1066	REQ_SEND;
926	}	1067	}
927		1068
928	void	1069	void
929	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1070	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
930	SV * fh
931	UV offset
932	IV length
933	SV * callback
934	PROTOTYPE: $$$;$
935	CODE:	1071	PPCODE:
936	{	1072	{
		1073	int fd = s_fileno_croak (fh, 0);
937	dREQ;	1074	dREQ;
938		1075
939	req->type = REQ_READAHEAD;	1076	req->type = EIO_READAHEAD;
940	req->fh = newSVsv (fh);	1077	req->sv1 = newSVsv (fh);
941	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1078	req->int1 = fd;
942	req->offset = offset;	1079	req->offs = offset;
943	req->length = length;	1080	req->size = length;
944		1081
945	send_req (req);	1082	REQ_SEND;
946	}	1083	}
947		1084
948	void	1085	void
949	aio_stat(fh_or_path,callback=&PL_sv_undef)	1086	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
950	SV * fh_or_path
951	SV * callback
952	ALIAS:	1087	ALIAS:
953	aio_stat = REQ_STAT	1088	aio_stat = EIO_STAT
954	aio_lstat = REQ_LSTAT	1089	aio_lstat = EIO_LSTAT
		1090	aio_statvfs = EIO_STATVFS
955	CODE:	1091	PPCODE:
956	{	1092	{
957	dREQ;	1093	dREQ;
958		1094
959	New (0, req->statdata, 1, Stat_t);	1095	req->sv1 = newSVsv (fh_or_path);
960	if (!req->statdata)
961	{
962	free_req (req);
963	croak ("out of memory during aio_req->statdata allocation");
964	}
965		1096
966	if (SvPOK (fh_or_path))	1097	if (SvPOK (req->sv1))
967	{	1098	{
968	req->type = ix;	1099	req->type = ix;
969	req->data = newSVsv (fh_or_path);
970	req->dataptr = SvPVbyte_nolen (req->data);	1100	req->ptr1 = SvPVbyte_nolen (req->sv1);
971	}	1101	}
972	else	1102	else
973	{	1103	{
974	req->type = REQ_FSTAT;	1104	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
975	req->fh = newSVsv (fh_or_path);
976	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1105	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
977	}	1106	}
978		1107
979	send_req (req);	1108	REQ_SEND;
980	}	1109	}
981		1110
		1111	UV
		1112	major (UV dev)
		1113	ALIAS:
		1114	minor = 1
		1115	CODE:
		1116	RETVAL = ix ? major (dev) : minor (dev);
		1117	OUTPUT:
		1118	RETVAL
		1119
		1120	UV
		1121	makedev (UV maj, UV min)
		1122	CODE:
		1123	RETVAL = makedev (maj, min);
		1124	OUTPUT:
		1125	RETVAL
		1126
982	void	1127	void
		1128	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	dREQ;
		1132
		1133	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1134	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1135	req->sv1 = newSVsv (fh_or_path);
		1136
		1137	if (SvPOK (req->sv1))
		1138	{
		1139	req->type = EIO_UTIME;
		1140	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1141	}
		1142	else
		1143	{
		1144	req->type = EIO_FUTIME;
		1145	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1146	}
		1147
		1148	REQ_SEND;
		1149	}
		1150
		1151	void
		1152	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1153	PPCODE:
		1154	{
		1155	dREQ;
		1156
		1157	req->sv1 = newSVsv (fh_or_path);
		1158	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1159
		1160	if (SvPOK (req->sv1))
		1161	{
		1162	req->type = EIO_TRUNCATE;
		1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1164	}
		1165	else
		1166	{
		1167	req->type = EIO_FTRUNCATE;
		1168	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1169	}
		1170
		1171	REQ_SEND;
		1172	}
		1173
		1174	void
		1175	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1176	ALIAS:
		1177	aio_chmod = EIO_CHMOD
		1178	aio_mkdir = EIO_MKDIR
		1179	PPCODE:
		1180	{
		1181	dREQ;
		1182
		1183	req->int2 = mode;
		1184	req->sv1 = newSVsv (fh_or_path);
		1185
		1186	if (SvPOK (req->sv1))
		1187	{
		1188	req->type = ix;
		1189	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1190	}
		1191	else
		1192	{
		1193	req->type = EIO_FCHMOD;
		1194	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1195	}
		1196
		1197	REQ_SEND;
		1198	}
		1199
		1200	void
		1201	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1202	PPCODE:
		1203	{
		1204	dREQ;
		1205
		1206	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1207	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1208	req->sv1 = newSVsv (fh_or_path);
		1209
		1210	if (SvPOK (req->sv1))
		1211	{
		1212	req->type = EIO_CHOWN;
		1213	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1214	}
		1215	else
		1216	{
		1217	req->type = EIO_FCHOWN;
		1218	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1219	}
		1220
		1221	REQ_SEND;
		1222	}
		1223
		1224	void
		1225	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1226	PPCODE:
		1227	{
		1228	dREQ;
		1229
		1230	req->type = EIO_READDIR;
		1231	req->sv1 = newSVsv (pathname);
		1232	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1233	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1234
		1235	if (flags & EIO_READDIR_DENTS)
		1236	req->int1 |= EIO_READDIR_CUSTOM2;
		1237
		1238	REQ_SEND;
		1239	}
		1240
		1241	void
983	aio_unlink(pathname,callback=&PL_sv_undef)	1242	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
984	SV * pathname
985	SV * callback
986	ALIAS:	1243	ALIAS:
987	aio_unlink = REQ_UNLINK	1244	aio_unlink = EIO_UNLINK
988	aio_rmdir = REQ_RMDIR	1245	aio_rmdir = EIO_RMDIR
		1246	aio_readdir = EIO_READDIR
989	CODE:	1247	PPCODE:
990	{	1248	{
991	dREQ;	1249	dREQ;
992		1250
993	req->type = ix;	1251	req->type = ix;
994	req->data = newSVsv (pathname);	1252	req->sv1 = newSVsv (pathname);
995	req->dataptr = SvPVbyte_nolen (req->data);	1253	req->ptr1 = SvPVbyte_nolen (req->sv1);
996
997	send_req (req);
998	}
999		1254
		1255	REQ_SEND;
		1256	}
		1257
1000	void	1258	void
1001	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1259	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1002	SV * oldpath	1260	ALIAS:
1003	SV * newpath	1261	aio_link = EIO_LINK
1004	SV * callback	1262	aio_symlink = EIO_SYMLINK
		1263	aio_rename = EIO_RENAME
1005	CODE:	1264	PPCODE:
1006	{	1265	{
1007	dREQ;	1266	dREQ;
1008		1267
1009	req->type = REQ_SYMLINK;	1268	req->type = ix;
1010	req->fh = newSVsv (oldpath);	1269	req->sv1 = newSVsv (oldpath);
1011	req->data2ptr = SvPVbyte_nolen (req->fh);	1270	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->data = newSVsv (newpath);	1271	req->sv2 = newSVsv (newpath);
1013	req->dataptr = SvPVbyte_nolen (req->data);	1272	req->ptr2 = SvPVbyte_nolen (req->sv2);
1014		1273
1015	send_req (req);	1274	REQ_SEND;
1016	}	1275	}
1017		1276
1018	void	1277	void
1019	aio_readdir(pathname,callback=&PL_sv_undef)	1278	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1020	SV * pathname
1021	SV * callback
1022	CODE:	1279	PPCODE:
1023	{	1280	{
1024	dREQ;	1281	dREQ;
1025		1282
1026	req->type = REQ_READDIR;	1283	req->type = EIO_MKNOD;
1027	req->data = newSVsv (pathname);	1284	req->sv1 = newSVsv (pathname);
1028	req->dataptr = SvPVbyte_nolen (req->data);	1285	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1286	req->int2 = (mode_t)mode;
		1287	req->offs = dev;
1029		1288
1030	send_req (req);	1289	REQ_SEND;
1031	}	1290	}
1032		1291
1033	void	1292	void
		1293	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1294	ALIAS:
		1295	aio_mtouch = EIO_MTOUCH
		1296	aio_msync = EIO_MSYNC
		1297	PPCODE:
		1298	{
		1299	STRLEN svlen;
		1300	char *svptr = SvPVbyte (data, svlen);
		1301	UV len = SvUV (length);
		1302
		1303	if (offset < 0)
		1304	offset += svlen;
		1305
		1306	if (offset < 0 || offset > svlen)
		1307	croak ("offset outside of scalar");
		1308
		1309	if (!SvOK (length) || len + offset > svlen)
		1310	len = svlen - offset;
		1311
		1312	{
		1313	dREQ;
		1314
		1315	req->type = ix;
		1316	req->sv2 = SvREFCNT_inc (data);
		1317	req->ptr2 = (char *)svptr + offset;
		1318	req->size = len;
		1319	req->int1 = flags;
		1320
		1321	REQ_SEND;
		1322	}
		1323	}
		1324
		1325	void
		1326	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1327	PPCODE:
		1328	{
		1329	STRLEN svlen;
		1330	char *svptr = SvPVbyte (data, svlen);
		1331	UV len = SvUV (length);
		1332
		1333	if (offset < 0)
		1334	offset += svlen;
		1335
		1336	if (offset < 0 || offset > svlen)
		1337	croak ("offset outside of scalar");
		1338
		1339	if (!SvOK (length) || len + offset > svlen)
		1340	len = svlen - offset;
		1341
		1342	{
		1343	dREQ;
		1344
		1345	req->type = EIO_MLOCK;
		1346	req->sv2 = SvREFCNT_inc (data);
		1347	req->ptr2 = (char *)svptr + offset;
		1348	req->size = len;
		1349
		1350	REQ_SEND;
		1351	}
		1352	}
		1353
		1354	void
		1355	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1356	PPCODE:
		1357	{
		1358	dREQ;
		1359
		1360	req->type = EIO_MLOCKALL;
		1361	req->int1 = flags;
		1362
		1363	REQ_SEND;
		1364	}
		1365
		1366	void
		1367	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1368	PPCODE:
		1369	{
		1370	dREQ;
		1371
		1372	req->type = EIO_BUSY;
		1373	req->nv1 = delay < 0. ? 0. : delay;
		1374
		1375	REQ_SEND;
		1376	}
		1377
		1378	void
		1379	aio_group (SV *callback=&PL_sv_undef)
		1380	PPCODE:
		1381	{
		1382	dREQ;
		1383
		1384	req->type = EIO_GROUP;
		1385
		1386	req_submit (req);
		1387	XPUSHs (req_sv (req, aio_grp_stash));
		1388	}
		1389
		1390	void
		1391	aio_nop (SV *callback=&PL_sv_undef)
		1392	ALIAS:
		1393	aio_nop = EIO_NOP
		1394	aio_sync = EIO_SYNC
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->type = ix;
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	int
		1405	aioreq_pri (int pri = 0)
		1406	CODE:
		1407	RETVAL = next_pri;
		1408	if (items > 0)
		1409	{
		1410	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1411	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1412	next_pri = pri;
		1413	}
		1414	OUTPUT:
		1415	RETVAL
		1416
		1417	void
		1418	aioreq_nice (int nice = 0)
		1419	CODE:
		1420	nice = next_pri - nice;
		1421	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1422	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1423	next_pri = nice;
		1424
		1425	void
1034	flush()	1426	flush ()
1035	PROTOTYPE:
1036	CODE:	1427	CODE:
1037	while (nreqs)	1428	while (eio_nreqs ())
1038	{	1429	{
1039	poll_wait ();	1430	poll_wait ();
1040	poll_cb ();	1431	poll_cb ();
1041	}	1432	}
1042		1433
1043	void
1044	poll()
1045	PROTOTYPE:
1046	CODE:
1047	if (nreqs)
1048	{
1049	poll_wait ();
1050	poll_cb ();
1051	}
1052
1053	int	1434	int
1054	poll_fileno()	1435	poll ()
1055	PROTOTYPE:
1056	CODE:	1436	CODE:
1057	RETVAL = respipe [0];	1437	poll_wait ();
1058	OUTPUT:
1059	RETVAL
1060
1061	int
1062	poll_cb(...)
1063	PROTOTYPE:
1064	CODE:
1065	RETVAL = poll_cb ();	1438	RETVAL = poll_cb ();
1066	OUTPUT:	1439	OUTPUT:
1067	RETVAL	1440	RETVAL
1068		1441
1069	void
1070	poll_wait()
1071	PROTOTYPE:
1072	CODE:
1073	if (nreqs)
1074	poll_wait ();
1075
1076	int	1442	int
1077	nreqs()	1443	poll_fileno ()
1078	PROTOTYPE:
1079	CODE:	1444	CODE:
1080	RETVAL = nreqs;	1445	RETVAL = s_epipe_fd (&respipe);
1081	OUTPUT:	1446	OUTPUT:
1082	RETVAL	1447	RETVAL
1083		1448
		1449	int
		1450	poll_cb (...)
		1451	PROTOTYPE:
		1452	CODE:
		1453	RETVAL = poll_cb ();
		1454	OUTPUT:
		1455	RETVAL
		1456
		1457	void
		1458	poll_wait ()
		1459	CODE:
		1460	poll_wait ();
		1461
		1462	int
		1463	nreqs ()
		1464	CODE:
		1465	RETVAL = eio_nreqs ();
		1466	OUTPUT:
		1467	RETVAL
		1468
		1469	int
		1470	nready ()
		1471	CODE:
		1472	RETVAL = eio_nready ();
		1473	OUTPUT:
		1474	RETVAL
		1475
		1476	int
		1477	npending ()
		1478	CODE:
		1479	RETVAL = eio_npending ();
		1480	OUTPUT:
		1481	RETVAL
		1482
		1483	int
		1484	nthreads ()
		1485	CODE:
		1486	RETVAL = eio_nthreads ();
		1487	OUTPUT:
		1488	RETVAL
		1489
		1490	int
		1491	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1492	CODE:
		1493	RETVAL = posix_fadvise (fh, offset, length, advice);
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	ssize_t
		1498	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1499	CODE:
		1500	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	void
		1505	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1506	PPCODE:
		1507	sv_unmagic (scalar, MMAP_MAGIC);
		1508	{
		1509	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1510	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1511	if (addr == (void *)-1)
		1512	XSRETURN_NO;
		1513
		1514	sv_force_normal (scalar);
		1515
		1516	/* we store the length in mg_obj, as namlen is I32 :/ */
		1517	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1518	->mg_obj = (SV *)length;
		1519
		1520	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1521
		1522	if (!(prot & PROT_WRITE))
		1523	SvREADONLY_on (scalar);
		1524
		1525	if (SvLEN (scalar))
		1526	Safefree (SvPVX (scalar));
		1527
		1528	SvPVX (scalar) = (char *)addr;
		1529	SvCUR_set (scalar, length);
		1530	SvLEN_set (scalar, 0);
		1531	SvPOK_only (scalar);
		1532
		1533	XSRETURN_YES;
		1534	}
		1535
		1536	void
		1537	munmap (SV *scalar)
		1538	CODE:
		1539	sv_unmagic (scalar, MMAP_MAGIC);
		1540
		1541	int
		1542	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1543	ALIAS:
		1544	mprotect = 1
		1545	CODE:
		1546	{
		1547	STRLEN svlen;
		1548	void *addr = SvPVbyte (scalar, svlen);
		1549	size_t len = SvUV (length);
		1550
		1551	if (offset < 0)
		1552	offset += svlen;
		1553
		1554	if (offset < 0 || offset > svlen)
		1555	croak ("offset outside of scalar");
		1556
		1557	if (!SvOK (length) || len + offset > svlen)
		1558	len = svlen - offset;
		1559
		1560	addr = (void *)(((intptr_t)addr) + offset);
		1561	eio_page_align (&addr, &len);
		1562
		1563	switch (ix)
		1564	{
		1565	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1566	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1567	}
		1568	}
		1569	OUTPUT:
		1570	RETVAL
		1571
		1572	int
		1573	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1574	CODE:
		1575	{
		1576	STRLEN svlen;
		1577	void *addr = SvPVbyte (scalar, svlen);
		1578	size_t len = SvUV (length);
		1579
		1580	if (offset < 0)
		1581	offset += svlen;
		1582
		1583	if (offset < 0 || offset > svlen)
		1584	croak ("offset outside of scalar");
		1585
		1586	if (!SvOK (length) || len + offset > svlen)
		1587	len = svlen - offset;
		1588
		1589	addr = (void *)(((intptr_t)addr) + offset);
		1590	eio_page_align (&addr, &len);
		1591	#if _POSIX_MEMLOCK_RANGE
		1592	RETVAL = munlock (addr, len);
		1593	#else
		1594	RETVAL = ((errno = ENOSYS), -1);
		1595	#endif
		1596	}
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	munlockall ()
		1602	CODE:
		1603	#if _POSIX_MEMLOCK
		1604	munlockall ();
		1605	#else
		1606	RETVAL = -1;
		1607	errno = ENOSYS;
		1608	#endif
		1609	OUTPUT:
		1610	RETVAL
		1611
		1612	void _on_next_submit (SV *cb)
		1613	CODE:
		1614	SvREFCNT_dec (on_next_submit);
		1615	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1616
		1617	PROTOTYPES: DISABLE
		1618
		1619	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1620
		1621	void
		1622	cancel (aio_req_ornot req)
		1623	CODE:
		1624	eio_cancel (req);
		1625
		1626	void
		1627	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1628	PPCODE:
		1629	{
		1630	if (GIMME_V != G_VOID)
		1631	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1632
		1633	if (items > 1)
		1634	{
		1635	SV *cb_cv =get_cb (callback);
		1636
		1637	SvREFCNT_dec (req->callback);
		1638	req->callback = SvREFCNT_inc (cb_cv);
		1639	}
		1640	}
		1641
		1642	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1643
		1644	void
		1645	add (aio_req grp, ...)
		1646	PPCODE:
		1647	{
		1648	int i;
		1649
		1650	if (grp->int1 == 2)
		1651	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1652
		1653	for (i = 1; i < items; ++i )
		1654	{
		1655	aio_req req;
		1656
		1657	if (GIMME_V != G_VOID)
		1658	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1659
		1660	req = SvAIO_REQ (ST (i));
		1661
		1662	if (req)
		1663	eio_grp_add (grp, req);
		1664	}
		1665	}
		1666
		1667	void
		1668	cancel_subs (aio_req_ornot req)
		1669	CODE:
		1670	req_cancel_subs (req);
		1671
		1672	void
		1673	result (aio_req grp, ...)
		1674	CODE:
		1675	{
		1676	int i;
		1677	AV *av;
		1678
		1679	grp->errorno = errno;
		1680
		1681	av = newAV ();
		1682	av_extend (av, items - 1);
		1683
		1684	for (i = 1; i < items; ++i )
		1685	av_push (av, newSVsv (ST (i)));
		1686
		1687	SvREFCNT_dec (grp->sv1);
		1688	grp->sv1 = (SV *)av;
		1689	}
		1690
		1691	void
		1692	errno (aio_req grp, int errorno = errno)
		1693	CODE:
		1694	grp->errorno = errorno;
		1695
		1696	void
		1697	limit (aio_req grp, int limit)
		1698	CODE:
		1699	eio_grp_limit (grp, limit);
		1700
		1701	void
		1702	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1703	CODE:
		1704	{
		1705	SvREFCNT_dec (grp->sv2);
		1706	grp->sv2 = newSVsv (callback);
		1707	grp->feed = aio_grp_feed;
		1708
		1709	if (grp->int2 <= 0)
		1710	grp->int2 = 2;
		1711
		1712	eio_grp_limit (grp, grp->int2);
		1713	}
		1714

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