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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 UTC vs.
Revision 1.251 by root, Sat Jan 6 01:04:42 2018 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 <errno.h>
14	#include <sys/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
16	#include <limits.h>	16	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	17	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	18	#include <sched.h>
21		19
22	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
23	# if __linux
24	# include <sys/sendfile.h>
25	# elif __freebsd
26	# include <sys/socket.h>
27	# include <sys/uio.h>	21	# include <sys/mman.h>
28	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
		37
		38	/* perl namespace pollution */
		39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
		84	#else
		85
29	# include <sys/socket.h>	86	#include <sys/time.h>
30	# elif __solaris /* not yet */
31	# include <sys/sendfile.h>	87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		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	#include "libeio/config.h"
		110
		111	#if HAVE_RLIMITS
		112	#include <sys/time.h>
		113	#include <sys/resource.h>
		114	#endif
		115
		116	typedef SV SV8; /* byte-sv, used for argument-checking */
		117	typedef int aio_rfd; /* read file desriptor */
		118	typedef int aio_wfd; /* write file descriptor */
		119
		120	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		121
		122	#define EIO_REQ_MEMBERS \
		123	SV *callback; \
		124	SV *sv1, *sv2; \
		125	SV *sv3, *sv4; \
		126	STRLEN stroffset; \
		127	SV *self;
		128
		129	#define EIO_NO_WRAPPERS 1
		130
		131	#include "libeio/eio.h"
		132
		133	static int req_invoke (eio_req *req);
		134	#define EIO_FINISH(req) req_invoke (req)
		135	static void req_destroy (eio_req *grp);
		136	#define EIO_DESTROY(req) req_destroy (req)
		137
		138	#include "libeio/eio.c"
		139
		140	#if !HAVE_POSIX_FADVISE
		141	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		142	#endif
		143
		144	#if !HAVE_POSIX_MADVISE
		145	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#ifndef MAP_ANONYMOUS
		149	# ifdef MAP_ANON
		150	# define MAP_ANONYMOUS MAP_ANON
32	# else	151	# else
33	# error sendfile support requested but not available	152	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	153	# endif
35	#endif	154	#endif
36		155
37	/* used for struct dirent, AIX doesn't provide it */	156	/* defines all sorts of constants to 0 unless they are already defined */
38	#ifndef NAME_MAX	157	/* also provides const_iv_ and const_niv_ macros for them */
39	# define NAME_MAX 4096	158	#include "def0.h"
40	#endif
41		159
42	#if __ia64	160	#ifndef makedev
43	# define STACKSIZE 65536	161	# define makedev(maj,min) (((maj) << 8) | (min))
44	#else
45	# define STACKSIZE 8192
46	#endif	162	#endif
		163	#ifndef major
		164	# define major(dev) ((dev) >> 8)
		165	#endif
		166	#ifndef minor
		167	# define minor(dev) ((dev) & 0xff)
		168	#endif
47		169
48	enum {	170	#if PAGESIZE <= 0
49	REQ_QUIT,	171	# define PAGESIZE sysconf (_SC_PAGESIZE)
50	REQ_OPEN, REQ_CLOSE,	172	#endif
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	173
52	REQ_SENDFILE,	174	/*****************************************************************************/
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	175
54	REQ_FSYNC, REQ_FDATASYNC,	176	#if !_POSIX_MAPPED_FILES
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	177	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
56	REQ_READDIR,	178	# define munmap(addr,length) EIO_ENOSYS ()
57	REQ_LINK, REQ_SYMLINK,	179	#endif
		180
		181	#if !_POSIX_MEMORY_PROTECTION
		182	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		183	#endif
		184
		185	#define FOREIGN_MAGIC PERL_MAGIC_ext
		186
		187	static int ecb_cold
		188	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		189	{
		190	int old_errno = errno;
		191	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		192	errno = old_errno;
		193
		194	mg->mg_obj = 0; /* just in case */
		195
		196	SvREADONLY_off (sv);
		197
		198	if (SvPVX (sv) != mg->mg_ptr)
		199	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		200
		201	SvCUR_set (sv, 0);
		202	SvPVX (sv) = 0;
		203	SvOK_off (sv);
		204
		205	return 0;
		206	}
		207
		208	static MGVTBL mmap_vtbl = {
		209	0, 0, 0, 0, mmap_free
58	};	210	};
59		211
60	typedef struct aio_cb {	212	static int ecb_cold
61	struct aio_cb *volatile next;	213	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
62
63	int type;
64
65	/* should receive a cleanup, with unions */
66	int fd, fd2;
67	off_t offset;
68	size_t length;
69	ssize_t result;
70	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76
77	Stat_t *statdata;
78	} aio_cb;
79
80	typedef aio_cb *aio_req;
81
82	static int started, wanted;
83	static volatile int nreqs;
84	static int max_outstanding = 1<<30;
85	static int respipe [2];
86
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90
91	static volatile aio_req reqs, reqe; /* queue start, queue end */
92	static volatile aio_req ress, rese; /* queue start, queue end */
93
94	static void free_req (aio_req req)
95	{	214	{
96	if (req->data)	215	free (mg->mg_ptr);
97	SvREFCNT_dec (req->data);	216	mg->mg_obj = 0; /* just in case */
98		217
99	if (req->fh)	218	SvREADONLY_off (sv);
100	SvREFCNT_dec (req->fh);
101		219
102	if (req->fh2)	220	if (SvPVX (sv) != mg->mg_ptr)
103	SvREFCNT_dec (req->fh2);	221	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
104		222
105	if (req->statdata)	223	SvCUR_set (sv, 0);
106	Safefree (req->statdata);	224	SvPVX (sv) = 0;
		225	SvOK_off (sv);
107		226
108	if (req->callback)	227	return 0;
109	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113
114	Safefree (req);
115	}	228	}
116		229
		230	static MGVTBL sysfree_vtbl = {
		231	0, 0, 0, 0, sysfree_free
		232	};
		233
		234	/*****************************************************************************/
		235
		236	/* helper: set scalar to foreign ptr with custom free */
117	static void	237	static void
118	poll_wait ()	238	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
119	{	239	{
120	if (nreqs && !ress)	240	sv_force_normal (sv);
121	{
122	fd_set rfd;
123	FD_ZERO(&rfd);
124	FD_SET(respipe [0], &rfd);
125		241
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	242	/* we store the length in mg_obj, as namlen is I32 :/ */
127	}	243	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
128	}	244	->mg_obj = (SV *)length;
129		245
		246	SvUPGRADE (sv, SVt_PV); /* nop... */
		247
		248	if (SvLEN (sv))
		249	Safefree (SvPVX (sv));
		250
		251	SvPVX (sv) = (char *)addr;
		252	SvCUR_set (sv, length);
		253	SvLEN_set (sv, 0);
		254	SvPOK_only (sv);
		255	}
		256
130	static int	257	static void
131	poll_cb ()	258	sv_clear_foreign (SV *sv)
132	{	259	{
133	dSP;	260	/* todo: iterate over magic and only free ours, but of course */
		261	/* the perl5porters will call that (correct) behaviour buggy */
		262	sv_unmagic (sv, FOREIGN_MAGIC);
		263	}
		264
		265	/*****************************************************************************/
		266
		267	static void
		268	fiemap (eio_req *req)
		269	{
		270	req->result = -1;
		271
		272	#if HAVE_FIEMAP
		273	/* assume some c99 */
		274	struct fiemap *fiemap = 0;
		275	size_t end_offset;
		276	int count = req->int3;
		277
		278	req->flags |= EIO_FLAG_PTR1_FREE;
		279
		280	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		281	/* increase in 3.5kb steps */
		282	if (count < 0)
134	int count = 0;	283	count = 8;
135	int do_croak = 0;	284
136	aio_req req;	285	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		286	errno = ENOMEM;
		287	if (!fiemap)
		288	return;
		289
		290	req->ptr1 = fiemap;
		291
		292	fiemap->fm_start = req->offs;
		293	fiemap->fm_length = req->size;
		294	fiemap->fm_flags = req->int2;
		295	fiemap->fm_extent_count = count;
		296
		297	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		298	return;
		299
		300	if (req->int3 >= 0 /* not autosizing */
		301	|| !fiemap->fm_mapped_extents /* no more extents */
		302	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		303	goto done;
		304
		305	/* else we have to loop -
		306	* it would be tempting (actually I tried that first) to just query the
		307	* number of extents needed, but linux often feels like not returning all
		308	* extents, without telling us it left any out. this complicates
		309	* this quite a bit.
		310	*/
		311
		312	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
137		313
138	for (;;)	314	for (;;)
139	{	315	{
140	pthread_mutex_lock (&reslock);	316	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
141	req = ress;	317	char scratch[3072];
		318	struct fiemap *incmap = (struct fiemap *)scratch;
142		319
		320	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		321	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		322	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		323	incmap->fm_flags = fiemap->fm_flags;
		324	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		325
		326	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		327	return;
		328
		329	if (!incmap->fm_mapped_extents)
		330	goto done;
		331
		332	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		333	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		334	errno = ENOMEM;
143	if (req)	335	if (!fiemap)
		336	return;
		337
		338	req->ptr1 = fiemap;
		339
		340	for (count = 0; count < incmap->fm_mapped_extents; ++count)
144	{	341	{
145	ress = req->next;	342	struct fiemap_extent *e = incmap->fm_extents + count;
146		343
147	if (!ress)	344	if (e->fe_logical + e->fe_length >= end_offset)
148	{	345	goto done;
149	/* read any signals sent by the worker threads */
150	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)
152	;
153		346
154	rese = 0;	347	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
155	}
156	}
157		348
158	pthread_mutex_unlock (&reslock);	349	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		350	goto done;
159		351
160	if (!req)
161	break;
162
163	nreqs--;
164
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
181	PL_laststatval = req->result;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}
211	else
212	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}
229	}
230
231	if (SvOK (req->callback))
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}
249
250	free_req (req);
251	}
252
253	return count;
254	}
255
256	static void *aio_proc(void *arg);
257
258	static void
259	start_thread (void)
260	{
261	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}
277
278	static void
279	send_req (aio_req req)
280	{
281	while (started < wanted && nreqs >= started)
282	start_thread ();
283
284	nreqs++;
285
286	pthread_mutex_lock (&reqlock);
287
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}
312
313	static void
314	end_thread (void)
315	{
316	aio_req req;
317	Newz (0, req, 1, aio_cb);
318	req->type = REQ_QUIT;
319
320	send_req (req);
321	}
322
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}
348
349	static void create_pipe ()
350	{
351	if (pipe (respipe))
352	croak ("unable to initialize result pipe");
353
354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
355	croak ("cannot set result pipe to nonblocking mode");
356
357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
358	croak ("cannot set result pipe to nonblocking mode");
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static ssize_t
416	readahead (int fd, off_t offset, size_t count)
417	{
418	char readahead_buf[4096];
419
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r
435
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{
441	struct dirent *e;
442	int errorno;
443
444	pthread_mutex_lock (&readdirlock);
445
446	e = readdir (dirp);
447	errorno = errno;
448
449	if (e)
450	{
451	*res = ent;
452	strcpy (ent->d_name, e->d_name);
453	}
454	else
455	*res = 0;
456
457	pthread_mutex_unlock (&readdirlock);
458
459	errno = errorno;
460	return e ? 0 : -1;
461	}
462	#endif
463
464	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
467	{
468	ssize_t res;
469
470	if (!count)
471	return 0;
472
473	#if HAVE_SENDFILE
474	# if __linux
475	res = sendfile (ofd, ifd, &offset, count);
476
477	# elif __freebsd
478	/*
479	* Of course, the freebsd sendfile is a dire hack with no thoughts
480	* wasted on making it similar to other I/O functions.
481	*/
482	{
483	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485
486	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
488	res = sbytes;
489	}
490
491	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);
493
494	# elif __solaris
495	{
496	struct sendfilevec vec;
497	size_t sbytes;
498
499	vec.sfv_fd = ifd;
500	vec.sfv_flag = 0;
501	vec.sfv_off = offset;
502	vec.sfv_len = count;
503
504	res = sendfilev (ofd, &vec, 1, &sbytes);
505
506	if (res < 0 && sbytes)
507	res = sbytes;
508	}
509
510	# endif
511	#else
512	res = -1;
513	errno = ENOSYS;
514	#endif
515
516	if (res < 0
517	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
518	#if __solaris
519	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
520	#endif
521	)
522	)
523	{
524	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];
526	res = 0;
527
528	while (count)
529	{
530	ssize_t cnt;
531
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534	if (cnt <= 0)
535	{
536	if (cnt && !res) res = -1;
537	break;
538	}
539
540	cnt = write (ofd, buf, cnt);
541
542	if (cnt <= 0)
543	{
544	if (cnt && !res) res = -1;
545	break;
546	}
547
548	offset += cnt;
549	res += cnt;
550	count -= cnt;
551	}	352	}
552	}	353	}
553		354
554	return res;	355	done:
555	}	356	req->result = 0;
556		357
557	/* read a full directory */	358	#else
		359	errno = ENOSYS;
		360	#endif
		361	}
		362
		363	/*****************************************************************************/
		364
		365	enum {
		366	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		367	};
		368
		369	typedef eio_req *aio_req;
		370	typedef eio_req *aio_req_ornot;
		371	typedef eio_wd aio_wd;
		372
		373	static SV *on_next_submit;
		374	static int next_pri = EIO_PRI_DEFAULT;
		375	static int max_outstanding;
		376
		377	static s_epipe respipe;
		378
		379	static void req_destroy (aio_req req);
		380	static void req_cancel (aio_req req);
		381
		382	static void
		383	want_poll (void)
		384	{
		385	/* write a dummy byte to the pipe so fh becomes ready */
		386	s_epipe_signal (&respipe);
		387	}
		388
		389	static void
		390	done_poll (void)
		391	{
		392	/* read any signals sent by the worker threads */
		393	s_epipe_drain (&respipe);
		394	}
		395
		396	/* must be called at most once */
		397	static SV *
		398	req_sv (aio_req req, HV *stash)
		399	{
		400	if (!req->self)
		401	{
		402	req->self = (SV *)newHV ();
		403	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		404	}
		405
		406	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		407	}
		408
		409	static SV *
		410	newSVaio_wd (aio_wd wd)
		411	{
		412	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		413	}
		414
		415	static aio_req
		416	SvAIO_REQ (SV *sv)
		417	{
		418	MAGIC *mg;
		419
		420	if (!SvROK (sv)
		421	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		422	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		423	&& SvSTASH (SvRV (sv)) != aio_req_stash
		424	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		425	croak ("object of class IO::AIO::REQ expected");
		426
		427	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		428
		429	return mg ? (aio_req)mg->mg_ptr : 0;
		430	}
		431
		432	static aio_wd
		433	SvAIO_WD (SV *sv)
		434	{
		435	if (!SvROK (sv)
		436	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		437	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		438	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		439
		440	return (aio_wd)(long)SvIVX (SvRV (sv));
		441	}
		442
		443	static SV *
		444	newmortalFH (int fd, int flags)
		445	{
		446	if (fd < 0)
		447	return &PL_sv_undef;
		448
		449	GV *gv = (GV *)sv_newmortal ();
		450	char sym[64];
		451	int symlen;
		452
		453	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		454	gv_init (gv, aio_stash, sym, symlen, 0);
		455
		456	symlen = snprintf (
		457	sym,
		458	sizeof (sym),
		459	"%s&=%d",
		460	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		461	fd
		462	);
		463
		464	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		465	? (SV *)gv : &PL_sv_undef;
		466	}
		467
		468	static void
		469	aio_grp_feed (aio_req grp)
		470	{
		471	if (grp->sv2 && SvOK (grp->sv2))
		472	{
		473	dSP;
		474
		475	ENTER;
		476	SAVETMPS;
		477	PUSHMARK (SP);
		478	XPUSHs (req_sv (grp, aio_grp_stash));
		479	PUTBACK;
		480	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		481	SPAGAIN;
		482	FREETMPS;
		483	LEAVE;
		484	}
		485	}
		486
		487	static void
		488	req_submit (eio_req *req)
		489	{
		490	eio_submit (req);
		491
		492	if (expect_false (on_next_submit))
		493	{
		494	dSP;
		495	SV *cb = sv_2mortal (on_next_submit);
		496
		497	on_next_submit = 0;
		498
		499	PUSHMARK (SP);
		500	PUTBACK;
		501	call_sv (cb, G_DISCARD | G_EVAL);
		502	}
		503	}
		504
558	static int	505	static int
559	scandir_ (const char *path, void **namesp)	506	req_invoke (eio_req *req)
560	{	507	{
561	DIR *dirp = opendir (path);	508	if (req->flags & FLAG_SV2_RO_OFF)
562	union	509	SvREADONLY_off (req->sv2);
563	{
564	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;
567	struct dirent *entp;
568	char *name, *names;
569	int memlen = 4096;
570	int memofs = 0;
571	int res = 0;
572	int errorno;
573		510
574	if (!dirp)	511	if (!EIO_CANCELLED (req) && req->callback)
575	return -1;
576
577	names = malloc (memlen);
578
579	for (;;)
580	{	512	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);	513	dSP;
		514	static SV *sv_result_cache; /* caches the result integer SV */
		515	SV *sv_result;
582		516
583	if (!entp)	517	ENTER;
584	break;	518	SAVETMPS;
		519	PUSHMARK (SP);
		520	EXTEND (SP, 1);
585		521
586	name = entp->d_name;	522	/* do not recreate the result IV from scratch each time */
587		523	if (expect_true (sv_result_cache))
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{	524	{
590	int len = strlen (name) + 1;	525	sv_result = sv_result_cache; sv_result_cache = 0;
591		526	SvIV_set (sv_result, req->result);
592	res++;	527	SvIOK_only (sv_result);
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632
633	for (;;)
634	{
635	req = reqs;
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642
643	if (req)
644	break;
645
646	pthread_cond_wait (&reqwait, &reqlock);
647	}
648
649	pthread_mutex_unlock (&reqlock);
650
651	errno = 0; /* strictly unnecessary */
652
653	type = req->type;
654
655	switch (type)
656	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
662
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
678
679	case REQ_QUIT:
680	break;
681
682	default:
683	req->result = ENOSYS;
684	break;
685	}
686
687	req->errorno = errno;
688
689	pthread_mutex_lock (&reslock);
690
691	req->next = 0;
692
693	if (rese)
694	{
695	rese->next = req;
696	rese = req;
697	}	528	}
698	else	529	else
699	{	530	{
700	rese = ress = req;	531	sv_result = newSViv (req->result);
701		532	SvREADONLY_on (sv_result);
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}	533	}
705		534
706	pthread_mutex_unlock (&reslock);	535	switch (req->type)
		536	{
		537	case EIO_WD_OPEN:
		538	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		539	break;
		540
		541	case EIO_READDIR:
		542	{
		543	SV *rv = &PL_sv_undef;
		544
		545	if (req->result >= 0)
		546	{
		547	int i;
		548	char *names = (char *)req->ptr2;
		549	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		550	AV *av = newAV ();
		551
		552	av_extend (av, req->result - 1);
		553
		554	for (i = 0; i < req->result; ++i)
		555	{
		556	if (req->int1 & EIO_READDIR_DENTS)
		557	{
		558	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		559
		560	if (req->int1 & EIO_READDIR_CUSTOM2)
		561	{
		562	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		563	AV *avent = newAV ();
		564
		565	av_extend (avent, 2);
		566
		567	if (!sv_type [ent->type])
		568	{
		569	sv_type [ent->type] = newSViv (ent->type);
		570	SvREADONLY_on (sv_type [ent->type]);
		571	}
		572
		573	av_store (avent, 0, namesv);
		574	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		575	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		576
		577	av_store (av, i, newRV_noinc ((SV *)avent));
		578	}
		579	else
		580	av_store (av, i, namesv);
		581
		582	++ent;
		583	}
		584	else
		585	{
		586	SV *name = newSVpv (names, 0);
		587	av_store (av, i, name);
		588	names += SvCUR (name) + 1;
		589	}
		590	}
		591
		592	rv = sv_2mortal (newRV_noinc ((SV *)av));
		593	}
		594
		595	PUSHs (rv);
		596
		597	if (req->int1 & EIO_READDIR_CUSTOM1)
		598	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		599	}
		600	break;
		601
		602	case EIO_OPEN:
		603	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		604	break;
		605
		606	case EIO_STATVFS:
		607	case EIO_FSTATVFS:
		608	{
		609	SV *rv = &PL_sv_undef;
		610
		611	#ifndef _WIN32
		612	if (req->result >= 0)
		613	{
		614	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		615	HV *hv = newHV ();
		616	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		617	* chooses to make it a struct.
		618	*/
		619	unsigned long fsid = 0;
		620	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		621
		622	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		623
		624	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		625	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		626	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		627	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		628	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		629	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		630	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		631	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		632	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		633	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		634	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		635	}
		636	#endif
		637
		638	PUSHs (rv);
		639	}
		640
		641	break;
		642
		643	case EIO_GROUP:
		644	req->int1 = 2; /* mark group as finished */
		645
		646	if (req->sv1)
		647	{
		648	int i;
		649	AV *av = (AV *)req->sv1;
		650
		651	EXTEND (SP, AvFILL (av) + 1);
		652	for (i = 0; i <= AvFILL (av); ++i)
		653	PUSHs (*av_fetch (av, i, 0));
		654	}
		655	break;
		656
		657	case EIO_NOP:
		658	case EIO_BUSY:
		659	break;
		660
		661	case EIO_READLINK:
		662	case EIO_REALPATH:
		663	if (req->result > 0)
		664	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		665	break;
		666
		667	case EIO_STAT:
		668	case EIO_LSTAT:
		669	case EIO_FSTAT:
		670	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		671
		672	if (!(PL_laststatval = req->result))
		673	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		674	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		675
		676	PUSHs (sv_result);
		677	break;
		678
		679	case EIO_SEEK:
		680	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		681	break;
		682
		683	case EIO_READ:
		684	{
		685	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		686	*SvEND (req->sv2) = 0;
		687	SvPOK_only (req->sv2);
		688	SvSETMAGIC (req->sv2);
		689	PUSHs (sv_result);
		690	}
		691	break;
		692
		693	case EIO_SLURP:
		694	{
		695	if (req->result >= 0)
		696	{
		697	/* if length was originally not known, we steal the malloc'ed memory */
		698	if (req->flags & EIO_FLAG_PTR2_FREE)
		699	{
		700	req->flags &= ~EIO_FLAG_PTR2_FREE;
		701	sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
		702	}
		703	else
		704	SvCUR_set (req->sv2, req->result);
		705	}
		706
		707	PUSHs (sv_result);
		708	}
		709	break;
		710
		711	case EIO_CUSTOM:
		712	if (req->feed == fiemap)
		713	{
		714	#if HAVE_FIEMAP
		715	if (!req->result)
		716	{
		717	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		718
		719	if (fiemap->fm_extent_count)
		720	{
		721	AV *av = newAV ();
		722	int i;
		723
		724	while (fiemap->fm_mapped_extents)
		725	{
		726	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		727	AV *ext_av = newAV ();
		728
		729	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		730	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		731	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		732	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		733
		734	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		735	}
		736
		737	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		738	}
		739	else
		740	{
		741	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		742	PUSHs (sv_result);
		743	}
		744	}
		745	#endif
		746	}
		747	else
		748	PUSHs (sv_result);
		749	break;
		750
		751	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		752	if (req->result > 0)
		753	SvIV_set (sv_result, 0);
		754	/* FALLTHROUGH */
		755
		756	default:
		757	PUSHs (sv_result);
		758	break;
		759	}
		760
		761	errno = req->errorno;
		762
		763	PUTBACK;
		764	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		765	SPAGAIN;
		766
		767	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		768	SvREFCNT_dec (sv_result);
		769	else
		770	sv_result_cache = sv_result;
		771
		772	FREETMPS;
		773	LEAVE;
		774
		775	PUTBACK;
707	}	776	}
708	while (type != REQ_QUIT);
709		777
		778	return !!SvTRUE (ERRSV);
		779	}
		780
		781	static void
		782	req_destroy (aio_req req)
		783	{
		784	if (req->self)
		785	{
		786	sv_unmagic (req->self, PERL_MAGIC_ext);
		787	SvREFCNT_dec (req->self);
		788	}
		789
		790	SvREFCNT_dec (req->sv1);
		791	SvREFCNT_dec (req->sv2);
		792	SvREFCNT_dec (req->sv3);
		793	SvREFCNT_dec (req->sv4);
		794	SvREFCNT_dec (req->callback);
		795
		796	free (req);
		797	}
		798
		799	static void
		800	req_cancel_subs (aio_req grp)
		801	{
		802	if (grp->type != EIO_GROUP)
710	return 0;	803	return;
		804
		805	SvREFCNT_dec (grp->sv2);
		806	grp->sv2 = 0;
		807
		808	eio_grp_cancel (grp);
		809	}
		810
		811	static void ecb_cold
		812	create_respipe (void)
		813	{
		814	if (s_epipe_renew (&respipe))
		815	croak ("IO::AIO: unable to initialize result pipe");
		816	}
		817
		818	static void
		819	poll_wait (void)
		820	{
		821	while (eio_nreqs ())
		822	{
		823	int size;
		824
		825	X_LOCK (EIO_POOL->reslock);
		826	size = EIO_POOL->res_queue.size;
		827	X_UNLOCK (EIO_POOL->reslock);
		828
		829	if (size)
		830	return;
		831
		832	etp_maybe_start_thread (EIO_POOL);
		833
		834	s_epipe_wait (&respipe);
		835	}
		836	}
		837
		838	static int
		839	poll_cb (void)
		840	{
		841	for (;;)
		842	{
		843	int res = eio_poll ();
		844
		845	if (res > 0)
		846	croak (0);
		847
		848	if (!max_outstanding || max_outstanding > eio_nreqs ())
		849	return res;
		850
		851	poll_wait ();
		852	}
		853	}
		854
		855	static void ecb_cold
		856	reinit (void)
		857	{
		858	create_respipe ();
		859
		860	if (eio_init (want_poll, done_poll) < 0)
		861	croak ("IO::AIO: unable to initialise eio library");
711	}	862	}
712		863
713	/*****************************************************************************/	864	/*****************************************************************************/
714		865
715	static void atfork_prepare (void)	866	static SV *
		867	get_cb (SV *cb_sv)
716	{	868	{
717	pthread_mutex_lock (&reqlock);	869	SvGETMAGIC (cb_sv);
718	pthread_mutex_lock (&reslock);	870	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
719	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);
721	#endif
722	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);
724	#endif
725	}	871	}
726		872
727	static void atfork_parent (void)	873	static aio_req ecb_noinline
		874	dreq (SV *callback)
728	{	875	{
729	#if !HAVE_READDIR_R	876	SV *cb_cv;
730	pthread_mutex_unlock (&readdirlock);
731	#endif
732	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);
734	#endif
735	pthread_mutex_unlock (&reslock);
736	pthread_mutex_unlock (&reqlock);
737	}
738
739	static void atfork_child (void)
740	{
741	aio_req prv;	877	aio_req req;
		878	int req_pri = next_pri;
		879	next_pri = EIO_PRI_DEFAULT;
742		880
743	started = 0;	881	cb_cv = get_cb (callback);
744		882
745	while (reqs)	883	req = calloc (sizeof (*req), 1);
		884	if (!req)
		885	croak ("out of memory during eio_req allocation");
		886
		887	req->callback = SvREFCNT_inc (cb_cv);
		888	req->pri = req_pri;
		889
		890	return req;
		891	}
		892
		893	#define dREQ \
		894	aio_req req = dreq (callback); \
		895
		896	#define REQ_SEND \
		897	PUTBACK; \
		898	req_submit (req); \
		899	SPAGAIN; \
		900	\
		901	if (GIMME_V != G_VOID) \
		902	XPUSHs (req_sv (req, aio_req_stash));
		903
		904	ecb_inline void
		905	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		906	{
		907	if (expect_false (SvROK (path)))
746	{	908	{
747	prv = reqs;	909	SV *rv = SvRV (path);
748	reqs = prv->next;	910	SV *wdob;
749	free_req (prv);	911
		912	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		913	{
		914	path = AvARRAY (rv)[1];
		915	wdob = AvARRAY (rv)[0];
		916
		917	if (SvOK (wdob))
		918	{
		919	*wd = SvAIO_WD (wdob);
		920	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		921	}
		922	else
		923	*wd = EIO_INVALID_WD;
		924	}
		925	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		926	{
		927	*wd = (aio_wd)(long)SvIVX (rv);
		928	*wdsv = SvREFCNT_inc_NN (rv);
		929	*ptr = ".";
		930	return; /* path set to "." */
		931	}
		932	else
		933	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
750	}	934	}
751		935
752	reqs = reqe = 0;	936	*pathsv = newSVsv (path);
753		937	*ptr = SvPVbyte_nolen (*pathsv);
754	while (ress)	938	}
		939
		940	static void ecb_noinline
		941	req_set_path1 (aio_req req, SV *path)
		942	{
		943	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		944	}
		945
		946	static void ecb_noinline
		947	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		948	{
		949	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		950
		951	switch (SvTYPE (rv))
755	{	952	{
756	prv = ress;	953	case SVt_PVIO:
757	ress = prv->next;	954	case SVt_PVLV:
758	free_req (prv);	955	case SVt_PVGV:
		956	req->type = type_fh;
		957	req->sv1 = newSVsv (fh_or_path);
		958	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		959	break;
		960
		961	default:
		962	req->type = type_path;
		963	req_set_path1 (req, fh_or_path);
		964	break;
759	}	965	}
760
761	ress = rese = 0;
762
763	close (respipe [0]);
764	close (respipe [1]);
765	create_pipe ();
766
767	atfork_parent ();
768	}	966	}
769		967
770	#define dREQ \	968	XS(boot_IO__AIO) ecb_cold;
771	aio_req req; \	969
772	\
773	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \
775	\
776	Newz (0, req, 1, aio_cb); \
777	if (!req) \
778	croak ("out of memory during aio_req allocation"); \
779	\
780	req->callback = newSVsv (callback);
781
782	MODULE = IO::AIO PACKAGE = IO::AIO	970	MODULE = IO::AIO PACKAGE = IO::AIO
783		971
784	PROTOTYPES: ENABLE	972	PROTOTYPES: ENABLE
785		973
786	BOOT:	974	BOOT:
787	{	975	{
		976	static const struct {
		977	const char *name;
		978	IV iv;
		979	} *civ, const_iv[] = {
		980	# define const_niv(name, value) { # name, (IV) value },
		981	# define const_iv(name) { # name, (IV) name },
		982	# define const_eio(name) { # name, (IV) EIO_ ## name },
		983
		984	/* you have to re-run ./gendef0 after adding/removing any constants here */
		985	/* the first block can be undef if missing */
		986	const_iv (ENOSYS)
		987	const_iv (EXDEV)
		988	const_iv (EBADR)
		989
		990	/* for lseek */
		991	const_iv (SEEK_DATA)
		992	const_iv (SEEK_HOLE)
		993
		994	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		995	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		996	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		997	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		998	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		999	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		1000
		1001	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		1002	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		1003	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		1004	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1005	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		1006
		1007	/* the second block will be 0 when missing */
		1008	const_iv (O_RDONLY)
		1009	const_iv (O_WRONLY)
		1010	const_iv (O_RDWR)
		1011	const_iv (O_CREAT)
		1012	const_iv (O_TRUNC)
		1013	const_iv (O_EXCL)
		1014	const_iv (O_APPEND)
		1015
		1016	const_iv (O_ASYNC)
		1017	const_iv (O_DIRECT)
		1018	const_iv (O_NOATIME)
		1019
		1020	const_iv (O_CLOEXEC)
		1021	const_iv (O_NOCTTY)
		1022	const_iv (O_NOFOLLOW)
		1023	const_iv (O_NONBLOCK)
		1024	const_iv (O_EXEC)
		1025	const_iv (O_SEARCH)
		1026	const_iv (O_DIRECTORY)
		1027	const_iv (O_DSYNC)
		1028	const_iv (O_RSYNC)
		1029	const_iv (O_SYNC)
		1030	const_iv (O_PATH)
		1031	const_iv (O_TMPFILE)
		1032	const_iv (O_TTY_INIT)
		1033
		1034	const_iv (S_IFIFO)
		1035	const_iv (S_IFCHR)
		1036	const_iv (S_IFBLK)
		1037	const_iv (S_IFLNK)
		1038	const_iv (S_IFREG)
		1039	const_iv (S_IFDIR)
		1040	const_iv (S_IFWHT)
		1041	const_iv (S_IFSOCK)
		1042	const_iv (S_IFMT)
		1043
		1044	const_iv (ST_RDONLY)
		1045	const_iv (ST_NOSUID)
		1046	const_iv (ST_NODEV)
		1047	const_iv (ST_NOEXEC)
		1048	const_iv (ST_SYNCHRONOUS)
		1049	const_iv (ST_MANDLOCK)
		1050	const_iv (ST_WRITE)
		1051	const_iv (ST_APPEND)
		1052	const_iv (ST_IMMUTABLE)
		1053	const_iv (ST_NOATIME)
		1054	const_iv (ST_NODIRATIME)
		1055	const_iv (ST_RELATIME)
		1056
		1057	const_iv (PROT_NONE)
		1058	const_iv (PROT_EXEC)
		1059	const_iv (PROT_READ)
		1060	const_iv (PROT_WRITE)
		1061
		1062	const_iv (MAP_PRIVATE)
		1063	const_iv (MAP_SHARED)
		1064	const_iv (MAP_FIXED)
		1065	const_iv (MAP_ANONYMOUS)
		1066
		1067	/* linuxish */
		1068	const_iv (MAP_LOCKED)
		1069	const_iv (MAP_NORESERVE)
		1070	const_iv (MAP_POPULATE)
		1071	const_iv (MAP_NONBLOCK)
		1072	const_iv (MAP_GROWSDOWN)
		1073	const_iv (MAP_32BIT)
		1074	const_iv (MAP_HUGETLB)
		1075	const_iv (MAP_STACK)
		1076
		1077	const_iv (F_DUPFD_CLOEXEC)
		1078
		1079	const_iv (F_OFD_GETLK)
		1080	const_iv (F_OFD_SETLK)
		1081	const_iv (F_OFD_GETLKW)
		1082
		1083	const_iv (FIFREEZE)
		1084	const_iv (FITHAW)
		1085	const_iv (FITRIM)
		1086	const_iv (FICLONE)
		1087	const_iv (FICLONERANGE)
		1088	const_iv (FIDEDUPERANGE)
		1089
		1090	const_iv (FS_IOC_GETFLAGS)
		1091	const_iv (FS_IOC_SETFLAGS)
		1092	const_iv (FS_IOC_GETVERSION)
		1093	const_iv (FS_IOC_SETVERSION)
		1094	const_iv (FS_IOC_FIEMAP)
		1095	const_iv (FS_IOC_FSGETXATTR)
		1096	const_iv (FS_IOC_FSSETXATTR)
		1097	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1098	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1099	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1100
		1101	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1102
		1103	const_iv (FS_SECRM_FL)
		1104	const_iv (FS_UNRM_FL)
		1105	const_iv (FS_COMPR_FL)
		1106	const_iv (FS_SYNC_FL)
		1107	const_iv (FS_IMMUTABLE_FL)
		1108	const_iv (FS_APPEND_FL)
		1109	const_iv (FS_NODUMP_FL)
		1110	const_iv (FS_NOATIME_FL)
		1111	const_iv (FS_DIRTY_FL)
		1112	const_iv (FS_COMPRBLK_FL)
		1113	const_iv (FS_NOCOMP_FL)
		1114	const_iv (FS_ENCRYPT_FL)
		1115	const_iv (FS_BTREE_FL)
		1116	const_iv (FS_INDEX_FL)
		1117	const_iv (FS_JOURNAL_DATA_FL)
		1118	const_iv (FS_NOTAIL_FL)
		1119	const_iv (FS_DIRSYNC_FL)
		1120	const_iv (FS_TOPDIR_FL)
		1121	const_iv (FS_FL_USER_MODIFIABLE)
		1122
		1123	const_iv (FS_XFLAG_REALTIME)
		1124	const_iv (FS_XFLAG_PREALLOC)
		1125	const_iv (FS_XFLAG_IMMUTABLE)
		1126	const_iv (FS_XFLAG_APPEND)
		1127	const_iv (FS_XFLAG_SYNC)
		1128	const_iv (FS_XFLAG_NOATIME)
		1129	const_iv (FS_XFLAG_NODUMP)
		1130	const_iv (FS_XFLAG_RTINHERIT)
		1131	const_iv (FS_XFLAG_PROJINHERIT)
		1132	const_iv (FS_XFLAG_NOSYMLINKS)
		1133	const_iv (FS_XFLAG_EXTSIZE)
		1134	const_iv (FS_XFLAG_EXTSZINHERIT)
		1135	const_iv (FS_XFLAG_NODEFRAG)
		1136	const_iv (FS_XFLAG_FILESTREAM)
		1137	const_iv (FS_XFLAG_DAX)
		1138	const_iv (FS_XFLAG_HASATTR)
		1139
		1140	const_iv (FIEMAP_FLAG_SYNC)
		1141	const_iv (FIEMAP_FLAG_XATTR)
		1142	const_iv (FIEMAP_FLAGS_COMPAT)
		1143	const_iv (FIEMAP_EXTENT_LAST)
		1144	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1145	const_iv (FIEMAP_EXTENT_DELALLOC)
		1146	const_iv (FIEMAP_EXTENT_ENCODED)
		1147	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1148	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1149	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1150	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1151	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1152	const_iv (FIEMAP_EXTENT_MERGED)
		1153	const_iv (FIEMAP_EXTENT_SHARED)
		1154
		1155	const_iv (SPLICE_F_MOVE)
		1156	const_iv (SPLICE_F_NONBLOCK)
		1157	const_iv (SPLICE_F_MORE)
		1158	const_iv (SPLICE_F_GIFT)
		1159
		1160	/* these are libeio constants, and are independent of gendef0 */
		1161	const_eio (SEEK_SET)
		1162	const_eio (SEEK_CUR)
		1163	const_eio (SEEK_END)
		1164
		1165	const_eio (MCL_FUTURE)
		1166	const_eio (MCL_CURRENT)
		1167
		1168	const_eio (MS_ASYNC)
		1169	const_eio (MS_INVALIDATE)
		1170	const_eio (MS_SYNC)
		1171
		1172	const_eio (MT_MODIFY)
		1173
		1174	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1175	const_eio (SYNC_FILE_RANGE_WRITE)
		1176	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1177
		1178	const_eio (FALLOC_FL_KEEP_SIZE)
		1179	const_eio (FALLOC_FL_PUNCH_HOLE)
		1180	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1181	const_eio (FALLOC_FL_ZERO_RANGE)
		1182	const_eio (FALLOC_FL_INSERT_RANGE)
		1183	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1184
		1185	const_eio (RENAME_NOREPLACE)
		1186	const_eio (RENAME_EXCHANGE)
		1187	const_eio (RENAME_WHITEOUT)
		1188
		1189	const_eio (READDIR_DENTS)
		1190	const_eio (READDIR_DIRS_FIRST)
		1191	const_eio (READDIR_STAT_ORDER)
		1192	const_eio (READDIR_FOUND_UNKNOWN)
		1193
		1194	const_eio (DT_UNKNOWN)
		1195	const_eio (DT_FIFO)
		1196	const_eio (DT_CHR)
		1197	const_eio (DT_DIR)
		1198	const_eio (DT_BLK)
		1199	const_eio (DT_REG)
		1200	const_eio (DT_LNK)
		1201	const_eio (DT_SOCK)
		1202	const_eio (DT_WHT)
		1203	};
		1204
788	HV *stash = gv_stashpv ("IO::AIO", 1);	1205	aio_stash = gv_stashpv ("IO::AIO" , 1);
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1206	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1207	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1208	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
792		1209
793	create_pipe ();	1210	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
795	}
796		1212
		1213	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1214
		1215	reinit ();
		1216	}
		1217
797	void	1218	void
798	min_parallel (nthreads)	1219	reinit ()
799	int nthreads	1220	PROTOTYPE:
		1221
		1222	void
		1223	max_poll_reqs (unsigned int nreqs)
800	PROTOTYPE: $	1224	PROTOTYPE: $
		1225	CODE:
		1226	eio_set_max_poll_reqs (nreqs);
801		1227
802	void	1228	void
803	max_parallel (nthreads)	1229	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	1230	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	1231	CODE:
812	RETVAL = max_outstanding;	1232	eio_set_max_poll_time (nseconds);
		1233
		1234	void
		1235	min_parallel (unsigned int nthreads)
		1236	PROTOTYPE: $
		1237	CODE:
		1238	eio_set_min_parallel (nthreads);
		1239
		1240	void
		1241	max_parallel (unsigned int nthreads)
		1242	PROTOTYPE: $
		1243	CODE:
		1244	eio_set_max_parallel (nthreads);
		1245
		1246	void
		1247	max_idle (unsigned int nthreads)
		1248	PROTOTYPE: $
		1249	CODE:
		1250	eio_set_max_idle (nthreads);
		1251
		1252	void
		1253	idle_timeout (unsigned int seconds)
		1254	PROTOTYPE: $
		1255	CODE:
		1256	eio_set_idle_timeout (seconds);
		1257
		1258	void
		1259	max_outstanding (unsigned int maxreqs)
		1260	PROTOTYPE: $
		1261	CODE:
813	max_outstanding = nreqs;	1262	max_outstanding = maxreqs;
814		1263
815	void	1264	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1265	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
817	SV * pathname
818	int flags
819	int mode
820	SV * callback
821	PROTOTYPE: $$$;$
822	CODE:	1266	PPCODE:
823	{	1267	{
824	dREQ;	1268	dREQ;
825		1269
		1270	req->type = EIO_WD_OPEN;
		1271	req_set_path1 (req, pathname);
		1272
		1273	REQ_SEND;
		1274	}
		1275
		1276	void
		1277	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1278	PPCODE:
		1279	{
		1280	dREQ;
		1281
826	req->type = REQ_OPEN;	1282	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	1283	req_set_path1 (req, pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1284	req->int1 = flags;
830	req->mode = mode;	1285	req->int2 = mode;
831		1286
832	send_req (req);	1287	REQ_SEND;
833	}	1288	}
834		1289
835	void	1290	void
836	aio_close (fh,callback=&PL_sv_undef)	1291	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$
840	ALIAS:	1292	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1293	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1294	aio_fdatasync = EIO_FDATASYNC
		1295	aio_syncfs = EIO_SYNCFS
844	CODE:	1296	PPCODE:
845	{	1297	{
		1298	int fd = s_fileno_croak (fh, 0);
846	dREQ;	1299	dREQ;
847		1300
848	req->type = ix;	1301	req->type = ix;
849	req->fh = newSVsv (fh);	1302	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1303	req->int1 = fd;
851		1304
852	send_req (req);	1305	REQ_SEND;
853	}	1306	}
854		1307
855	void	1308	void
		1309	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1310	PPCODE:
		1311	{
		1312	int fd = s_fileno_croak (fh, 0);
		1313	dREQ;
		1314
		1315	req->type = EIO_SYNC_FILE_RANGE;
		1316	req->sv1 = newSVsv (fh);
		1317	req->int1 = fd;
		1318	req->offs = offset;
		1319	req->size = nbytes;
		1320	req->int2 = flags;
		1321
		1322	REQ_SEND;
		1323	}
		1324
		1325	void
		1326	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1327	PPCODE:
		1328	{
		1329	int fd = s_fileno_croak (fh, 0);
		1330	dREQ;
		1331
		1332	req->type = EIO_FALLOCATE;
		1333	req->sv1 = newSVsv (fh);
		1334	req->int1 = fd;
		1335	req->int2 = mode;
		1336	req->offs = offset;
		1337	req->size = len;
		1338
		1339	REQ_SEND;
		1340	}
		1341
		1342	void
		1343	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1344	PPCODE:
		1345	{
		1346	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1347	int fd = s_fileno_croak (fh, 0);
		1348	dREQ;
		1349
		1350	if (expect_false (close_fd < 0))
		1351	{
		1352	int pipefd [2];
		1353
		1354	if (
		1355	#ifdef _WIN32
		1356	_pipe (pipefd, 1, _O_BINARY) < 0
		1357	#else
		1358	pipe (pipefd) < 0
		1359	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1360	#endif
		1361	|| close (pipefd [1]) < 0
		1362	)
		1363	abort (); /*D*/
		1364
		1365	close_fd = pipefd [0];
		1366	}
		1367
		1368	req->type = EIO_DUP2;
		1369	req->int1 = close_fd;
		1370	req->sv2 = newSVsv (fh);
		1371	req->int2 = fd;
		1372
		1373	REQ_SEND;
		1374	}
		1375
		1376	void
		1377	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1378	PPCODE:
		1379	{
		1380	int fd = s_fileno_croak (fh, 0);
		1381	dREQ;
		1382
		1383	req->type = EIO_SEEK;
		1384	req->sv1 = newSVsv (fh);
		1385	req->int1 = fd;
		1386	req->offs = SvVAL64 (offset);
		1387	req->int2 = whence;
		1388
		1389	REQ_SEND;
		1390	}
		1391
		1392	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1393	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
857	SV * fh
858	UV offset
859	UV length
860	SV * data
861	UV dataoffset
862	SV * callback
863	ALIAS:	1394	ALIAS:
864	aio_read = REQ_READ	1395	aio_read = EIO_READ
865	aio_write = REQ_WRITE	1396	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$
867	CODE:	1397	PPCODE:
868	{	1398	{
869	aio_req req;
870	STRLEN svlen;	1399	STRLEN svlen;
		1400	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	1401	char *svptr = SvPVbyte (data, svlen);
872		1402	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		1403
876	if (dataoffset < 0)	1404	if (dataoffset < 0)
877	dataoffset += svlen;	1405	dataoffset += svlen;
878		1406
879	if (dataoffset < 0 || dataoffset > svlen)	1407	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	1408	croak ("dataoffset outside of data scalar");
881		1409
882	if (ix == REQ_WRITE)	1410	if (ix == EIO_WRITE)
883	{	1411	{
884	/* write: check length and adjust. */	1412	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	1413	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	1414	len = svlen - dataoffset;
887	}	1415	}
888	else	1416	else
889	{	1417	{
890	/* read: grow scalar as necessary */	1418	/* read: check type and grow scalar as necessary */
		1419	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
891	svptr = SvGROW (data, length + dataoffset);	1420	svptr = sv_grow (data, len + dataoffset);
		1421	else if (SvCUR (data) < len + dataoffset)
		1422	croak ("length + dataoffset outside of scalar, and cannot grow");
892	}	1423	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		1424
897	{	1425	{
898	dREQ;	1426	dREQ;
899		1427
900	req->type = ix;	1428	req->type = ix;
901	req->fh = newSVsv (fh);	1429	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1430	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	1431	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	1432	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	1433	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	1434	req->ptr2 = (char *)svptr + dataoffset;
		1435	req->stroffset = dataoffset;
908		1436
909	if (!SvREADONLY (data))	1437	if (!SvREADONLY (data))
910	{	1438	{
911	SvREADONLY_on (data);	1439	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1440	req->flags |= FLAG_SV2_RO_OFF;
913	}	1441	}
914		1442
915	send_req (req);	1443	REQ_SEND;
916	}	1444	}
917	}	1445	}
918		1446
919	void	1447	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1448	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
921	SV * out_fh
922	SV * in_fh
923	UV in_offset
924	UV length
925	SV * callback
926	PROTOTYPE: $$$$;$
927	CODE:
928	{
929	dREQ;
930
931	req->type = REQ_SENDFILE;
932	req->fh = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934	req->fh2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;
937	req->length = length;
938
939	send_req (req);
940	}
941
942	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$
949	CODE:
950	{
951	dREQ;
952
953	req->type = REQ_READAHEAD;
954	req->fh = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;
957	req->length = length;
958
959	send_req (req);
960	}
961
962	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	1449	ALIAS:
967	aio_stat = REQ_STAT	1450	aio_ioctl = EIO_IOCTL
968	aio_lstat = REQ_LSTAT	1451	aio_fcntl = EIO_FCNTL
969	CODE:	1452	PPCODE:
970	{	1453	{
971	dREQ;	1454	int fd = s_fileno_croak (fh, 0);
		1455	char *svptr;
972		1456
973	New (0, req->statdata, 1, Stat_t);	1457	if (SvPOK (arg) || !SvNIOK (arg))
974	if (!req->statdata)
975	{	1458	{
976	free_req (req);	1459	STRLEN svlen;
977	croak ("out of memory during aio_req->statdata allocation");	1460	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
978	}	1461	#ifdef IOCPARM_LEN
		1462	STRLEN need = IOCPARM_LEN (request);
		1463	#else
		1464	STRLEN need = 256;
		1465	#endif
979		1466
980	if (SvPOK (fh_or_path))	1467	if (svlen < need)
981	{	1468	svptr = SvGROW (arg, need);
982	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);
985	}	1469	}
986	else	1470	else
		1471	svptr = (char *)SvIV (arg);
		1472
987	{	1473	{
		1474	dREQ;
		1475
988	req->type = REQ_FSTAT;	1476	req->type = ix;
989	req->fh = newSVsv (fh_or_path);	1477	req->sv1 = newSVsv (fh);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1478	req->int1 = fd;
		1479	req->int2 = (long)request;
		1480	req->sv2 = SvREFCNT_inc (arg);
		1481	req->ptr2 = svptr;
		1482
		1483	REQ_SEND;
991	}	1484	}
992
993	send_req (req);
994	}	1485	}
995		1486
996	void	1487	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1488	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1489	ALIAS:
1001	aio_unlink = REQ_UNLINK
1002	aio_rmdir = REQ_RMDIR
1003	aio_readdir = REQ_READDIR	1490	aio_readlink = EIO_READLINK
		1491	aio_realpath = EIO_REALPATH
		1492	PPCODE:
		1493	{
		1494	dREQ;
		1495
		1496	req->type = ix;
		1497	req_set_path1 (req, pathname);
		1498
		1499	REQ_SEND;
		1500	}
		1501
		1502	void
		1503	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1504	PPCODE:
		1505	{
		1506	int ifd = s_fileno_croak (in_fh , 0);
		1507	int ofd = s_fileno_croak (out_fh, 1);
		1508	dREQ;
		1509
		1510	req->type = EIO_SENDFILE;
		1511	req->sv1 = newSVsv (out_fh);
		1512	req->int1 = ofd;
		1513	req->sv2 = newSVsv (in_fh);
		1514	req->int2 = ifd;
		1515	req->offs = in_offset;
		1516	req->size = length;
		1517
		1518	REQ_SEND;
		1519	}
		1520
		1521	void
		1522	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1523	PPCODE:
		1524	{
		1525	int fd = s_fileno_croak (fh, 0);
		1526	dREQ;
		1527
		1528	req->type = EIO_READAHEAD;
		1529	req->sv1 = newSVsv (fh);
		1530	req->int1 = fd;
		1531	req->offs = offset;
		1532	req->size = length;
		1533
		1534	REQ_SEND;
		1535	}
		1536
		1537	void
		1538	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1539	ALIAS:
		1540	aio_stat = EIO_STAT
		1541	aio_lstat = EIO_LSTAT
		1542	aio_statvfs = EIO_STATVFS
		1543	PPCODE:
		1544	{
		1545	dREQ;
		1546
		1547	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1548
		1549	REQ_SEND;
		1550	}
		1551
		1552	UV
		1553	major (UV dev)
		1554	ALIAS:
		1555	minor = 1
1004	CODE:	1556	CODE:
		1557	RETVAL = ix ? minor (dev) : major (dev);
		1558	OUTPUT:
		1559	RETVAL
		1560
		1561	UV
		1562	makedev (UV maj, UV min)
		1563	CODE:
		1564	RETVAL = makedev (maj, min);
		1565	OUTPUT:
		1566	RETVAL
		1567
		1568	void
		1569	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1570	PPCODE:
		1571	{
		1572	dREQ;
		1573
		1574	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1575	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1576	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1577
		1578	REQ_SEND;
		1579	}
		1580
		1581	void
		1582	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1583	PPCODE:
		1584	{
		1585	dREQ;
		1586
		1587	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1588	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1589
		1590	REQ_SEND;
		1591	}
		1592
		1593	void
		1594	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1595	PPCODE:
		1596	{
		1597	dREQ;
		1598
		1599	req->int2 = mode;
		1600	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1601
		1602	REQ_SEND;
		1603	}
		1604
		1605	void
		1606	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1607	PPCODE:
		1608	{
		1609	dREQ;
		1610
		1611	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1612	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1613	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1614
		1615	REQ_SEND;
		1616	}
		1617
		1618	void
		1619	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1620	PPCODE:
		1621	{
		1622	dREQ;
		1623
		1624	req->type = EIO_READDIR;
		1625	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1626
		1627	if (flags & EIO_READDIR_DENTS)
		1628	req->int1 |= EIO_READDIR_CUSTOM2;
		1629
		1630	req_set_path1 (req, pathname);
		1631
		1632	REQ_SEND;
		1633	}
		1634
		1635	void
		1636	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1637	PPCODE:
		1638	{
		1639	dREQ;
		1640
		1641	req->type = EIO_MKDIR;
		1642	req->int2 = mode;
		1643	req_set_path1 (req, pathname);
		1644
		1645	REQ_SEND;
		1646	}
		1647
		1648	void
		1649	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1650	ALIAS:
		1651	aio_unlink = EIO_UNLINK
		1652	aio_rmdir = EIO_RMDIR
		1653	aio_readdir = EIO_READDIR
		1654	PPCODE:
1005	{	1655	{
1006	dREQ;	1656	dREQ;
1007		1657
1008	req->type = ix;	1658	req->type = ix;
1009	req->data = newSVsv (pathname);	1659	req_set_path1 (req, pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);
1011
1012	send_req (req);
1013	}
1014		1660
		1661	REQ_SEND;
		1662	}
		1663
1015	void	1664	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1665	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	1666	ALIAS:
1021	aio_link = REQ_LINK	1667	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	1668	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	1669	aio_rename = EIO_RENAME
1024	CODE:	1670	PPCODE:
1025	{	1671	{
		1672	eio_wd wd2 = 0;
1026	dREQ;	1673	dREQ;
1027		1674
1028	req->type = ix;	1675	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1676	req_set_path1 (req, oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1677	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1031	req->data = newSVsv (newpath);	1678	req->int3 = (long)wd2;
1032	req->dataptr = SvPVbyte_nolen (req->data);
1033		1679
1034	send_req (req);	1680	REQ_SEND;
1035	}	1681	}
		1682
		1683	void
		1684	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
		1685	PPCODE:
		1686	{
		1687	eio_wd wd2 = 0;
		1688	dREQ;
		1689
		1690	req->type = EIO_RENAME;
		1691	req_set_path1 (req, oldpath);
		1692	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1693	req->int2 = flags;
		1694	req->int3 = (long)wd2;
		1695
		1696	REQ_SEND;
		1697	}
		1698
		1699	void
		1700	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
		1701	PPCODE:
		1702	{
		1703	dREQ;
		1704
		1705	req->type = EIO_MKNOD;
		1706	req->int2 = (mode_t)mode;
		1707	req->offs = dev;
		1708	req_set_path1 (req, pathname);
		1709
		1710	REQ_SEND;
		1711	}
		1712
		1713	void
		1714	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1715	ALIAS:
		1716	aio_mtouch = EIO_MTOUCH
		1717	aio_msync = EIO_MSYNC
		1718	PPCODE:
		1719	{
		1720	STRLEN svlen;
		1721	char *svptr = SvPVbyte (data, svlen);
		1722	UV len = SvUV (length);
		1723
		1724	if (flags < 0)
		1725	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1726
		1727	if (offset < 0)
		1728	offset += svlen;
		1729
		1730	if (offset < 0 || offset > svlen)
		1731	croak ("offset outside of scalar");
		1732
		1733	if (!SvOK (length) || len + offset > svlen)
		1734	len = svlen - offset;
		1735
		1736	{
		1737	dREQ;
		1738
		1739	req->type = ix;
		1740	req->sv2 = SvREFCNT_inc (data);
		1741	req->ptr2 = (char *)svptr + offset;
		1742	req->size = len;
		1743	req->int1 = flags;
		1744
		1745	REQ_SEND;
		1746	}
		1747	}
		1748
		1749	void
		1750	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1751	PPCODE:
		1752	{
		1753	STRLEN svlen;
		1754	char *svptr = SvPVbyte (data, svlen);
		1755	UV 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	{
		1767	dREQ;
		1768
		1769	req->type = EIO_MLOCK;
		1770	req->sv2 = SvREFCNT_inc (data);
		1771	req->ptr2 = (char *)svptr + offset;
		1772	req->size = len;
		1773
		1774	REQ_SEND;
		1775	}
		1776	}
		1777
		1778	void
		1779	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1780	PPCODE:
		1781	{
		1782	dREQ;
		1783
		1784	req->type = EIO_MLOCKALL;
		1785	req->int1 = flags;
		1786
		1787	REQ_SEND;
		1788	}
		1789
		1790	void
		1791	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1792	PPCODE:
		1793	{
		1794	int fd = s_fileno_croak (fh, 0);
		1795	dREQ;
		1796
		1797	req->type = EIO_CUSTOM;
		1798	req->sv1 = newSVsv (fh);
		1799	req->int1 = fd;
		1800
		1801	req->feed = fiemap;
		1802	#if HAVE_FIEMAP
		1803	/* keep our fingers crossed that the next two types are 64 bit */
		1804	req->offs = start;
		1805	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1806	req->int2 = flags;
		1807	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1808	#endif
		1809
		1810	REQ_SEND;
		1811	}
		1812
		1813	void
		1814	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
		1815	PPCODE:
		1816	{
		1817	char *svptr = 0;
		1818
		1819	sv_clear_foreign (data);
		1820
		1821	if (length) /* known length, directly read into scalar */
		1822	{
		1823	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1824	svptr = sv_grow (data, length);
		1825	else if (SvCUR (data) < length)
		1826	croak ("length outside of scalar, and cannot grow");
		1827	else
		1828	svptr = SvPVbyte_nolen (data);
		1829	}
		1830
		1831	{
		1832	dREQ;
		1833
		1834	req->type = EIO_SLURP;
		1835	req_set_path1 (req, pathname);
		1836	req->offs = offset;
		1837	req->size = length;
		1838	req->sv2 = SvREFCNT_inc (data);
		1839	req->ptr2 = svptr;
		1840
		1841	if (!SvREADONLY (data))
		1842	{
		1843	SvREADONLY_on (data);
		1844	req->flags |= FLAG_SV2_RO_OFF;
		1845	}
		1846
		1847	REQ_SEND;
		1848	}
		1849	}
		1850
		1851	void
		1852	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1853	PPCODE:
		1854	{
		1855	dREQ;
		1856
		1857	req->type = EIO_BUSY;
		1858	req->nv1 = delay < 0. ? 0. : delay;
		1859
		1860	REQ_SEND;
		1861	}
		1862
		1863	void
		1864	aio_group (SV *callback = &PL_sv_undef)
		1865	PPCODE:
		1866	{
		1867	dREQ;
		1868
		1869	req->type = EIO_GROUP;
		1870
		1871	PUTBACK;
		1872	req_submit (req);
		1873	SPAGAIN;
		1874
		1875	XPUSHs (req_sv (req, aio_grp_stash));
		1876	}
		1877
		1878	void
		1879	aio_nop (SV *callback = &PL_sv_undef)
		1880	ALIAS:
		1881	aio_nop = EIO_NOP
		1882	aio_sync = EIO_SYNC
		1883	PPCODE:
		1884	{
		1885	dREQ;
		1886
		1887	req->type = ix;
		1888
		1889	REQ_SEND;
		1890	}
		1891
		1892	int
		1893	aioreq_pri (int pri = NO_INIT)
		1894	CODE:
		1895	RETVAL = next_pri;
		1896	if (items > 0)
		1897	{
		1898	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1899	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1900	next_pri = pri;
		1901	}
		1902	OUTPUT:
		1903	RETVAL
		1904
		1905	void
		1906	aioreq_nice (int nice = 0)
		1907	CODE:
		1908	nice = next_pri - nice;
		1909	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1910	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1911	next_pri = nice;
1036		1912
1037	void	1913	void
1038	flush ()	1914	flush ()
1039	PROTOTYPE:
1040	CODE:	1915	CODE:
1041	while (nreqs)	1916	while (eio_nreqs ())
1042	{	1917	{
1043	poll_wait ();	1918	poll_wait ();
1044	poll_cb ();	1919	poll_cb ();
1045	}	1920	}
1046		1921
1047	void	1922	int
1048	poll()	1923	poll ()
1049	PROTOTYPE:
1050	CODE:	1924	CODE:
1051	if (nreqs)
1052	{
1053	poll_wait ();	1925	poll_wait ();
1054	poll_cb ();	1926	RETVAL = poll_cb ();
1055	}
1056
1057	int
1058	poll_fileno()
1059	PROTOTYPE:
1060	CODE:
1061	RETVAL = respipe [0];
1062	OUTPUT:	1927	OUTPUT:
1063	RETVAL	1928	RETVAL
1064		1929
1065	int	1930	int
		1931	poll_fileno ()
		1932	CODE:
		1933	RETVAL = s_epipe_fd (&respipe);
		1934	OUTPUT:
		1935	RETVAL
		1936
		1937	int
1066	poll_cb(...)	1938	poll_cb (...)
1067	PROTOTYPE:	1939	PROTOTYPE:
1068	CODE:	1940	CODE:
1069	RETVAL = poll_cb ();	1941	RETVAL = poll_cb ();
1070	OUTPUT:	1942	OUTPUT:
1071	RETVAL	1943	RETVAL
1072		1944
1073	void	1945	void
1074	poll_wait()	1946	poll_wait ()
1075	PROTOTYPE:
1076	CODE:	1947	CODE:
1077	if (nreqs)
1078	poll_wait ();	1948	poll_wait ();
1079		1949
1080	int	1950	int
1081	nreqs()	1951	nreqs ()
1082	PROTOTYPE:
1083	CODE:	1952	CODE:
1084	RETVAL = nreqs;	1953	RETVAL = eio_nreqs ();
1085	OUTPUT:	1954	OUTPUT:
1086	RETVAL	1955	RETVAL
1087		1956
		1957	int
		1958	nready ()
		1959	CODE:
		1960	RETVAL = eio_nready ();
		1961	OUTPUT:
		1962	RETVAL
		1963
		1964	int
		1965	npending ()
		1966	CODE:
		1967	RETVAL = eio_npending ();
		1968	OUTPUT:
		1969	RETVAL
		1970
		1971	int
		1972	nthreads ()
		1973	CODE:
		1974	RETVAL = eio_nthreads ();
		1975	OUTPUT:
		1976	RETVAL
		1977
		1978	int
		1979	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1980	CODE:
		1981	RETVAL = posix_fadvise (fh, offset, length, advice);
		1982	OUTPUT:
		1983	RETVAL
		1984
		1985	IV
		1986	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1987	CODE:
		1988	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1989	OUTPUT:
		1990	RETVAL
		1991
		1992	void
		1993	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1994	PPCODE:
		1995	sv_clear_foreign (scalar);
		1996	{
		1997	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1998	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1999	if (addr == (void *)-1)
		2000	XSRETURN_NO;
		2001
		2002	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2003
		2004	if (!(prot & PROT_WRITE))
		2005	SvREADONLY_on (scalar);
		2006
		2007	XSRETURN_YES;
		2008	}
		2009
		2010	void
		2011	munmap (SV *scalar)
		2012	CODE:
		2013	sv_clear_foreign (scalar);
		2014
		2015	int
		2016	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2017	ALIAS:
		2018	mprotect = 1
		2019	CODE:
		2020	{
		2021	STRLEN svlen;
		2022	void *addr = SvPVbyte (scalar, svlen);
		2023	STRLEN len = SvUV (length);
		2024
		2025	if (offset < 0)
		2026	offset += svlen;
		2027
		2028	if (offset < 0 || offset > svlen)
		2029	croak ("offset outside of scalar");
		2030
		2031	if (!SvOK (length) || len + offset > svlen)
		2032	len = svlen - offset;
		2033
		2034	addr = (void *)(((intptr_t)addr) + offset);
		2035	eio_page_align (&addr, &len);
		2036
		2037	switch (ix)
		2038	{
		2039	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2040	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2041	}
		2042	}
		2043	OUTPUT:
		2044	RETVAL
		2045
		2046	int
		2047	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		2048	CODE:
		2049	{
		2050	STRLEN svlen;
		2051	void *addr = SvPVbyte (scalar, svlen);
		2052	size_t len = SvUV (length);
		2053
		2054	if (offset < 0)
		2055	offset += svlen;
		2056
		2057	if (offset < 0 || offset > svlen)
		2058	croak ("offset outside of scalar");
		2059
		2060	if (!SvOK (length) || len + offset > svlen)
		2061	len = svlen - offset;
		2062
		2063	addr = (void *)(((intptr_t)addr) + offset);
		2064	eio_page_align (&addr, &len);
		2065	#if _POSIX_MEMLOCK_RANGE
		2066	RETVAL = munlock (addr, len);
		2067	#else
		2068	RETVAL = EIO_ENOSYS ();
		2069	#endif
		2070	}
		2071	OUTPUT:
		2072	RETVAL
		2073
		2074	int
		2075	munlockall ()
		2076	CODE:
		2077	#if _POSIX_MEMLOCK
		2078	munlockall ();
		2079	#else
		2080	RETVAL = EIO_ENOSYS ();
		2081	#endif
		2082	OUTPUT:
		2083	RETVAL
		2084
		2085	int
		2086	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2087	CODE:
		2088	{
		2089	#if HAVE_LINUX_SPLICE
		2090	loff_t off_in_, off_out_;
		2091	RETVAL = splice (
		2092	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2093	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2094	length, flags
		2095	);
		2096	#else
		2097	RETVAL = EIO_ENOSYS ();
		2098	#endif
		2099	}
		2100	OUTPUT:
		2101	RETVAL
		2102
		2103	int
		2104	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2105	CODE:
		2106	#if HAVE_LINUX_SPLICE
		2107	RETVAL = tee (rfh, wfh, length, flags);
		2108	#else
		2109	RETVAL = EIO_ENOSYS ();
		2110	#endif
		2111	OUTPUT:
		2112	RETVAL
		2113
		2114	int
		2115	pipesize (aio_rfd rfh, int new_size = -1)
		2116	PROTOTYPE: $;$
		2117	CODE:
		2118	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2119	if (new_size >= 0)
		2120	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2121	else
		2122	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2123	#else
		2124	errno = ENOSYS;
		2125	RETVAL = -1;
		2126	#endif
		2127	OUTPUT:
		2128	RETVAL
		2129
		2130	void
		2131	pipe2 (int flags = 0)
		2132	PROTOTYPE: ;$
		2133	PPCODE:
		2134	{
		2135	int fd[2];
		2136	int res;
		2137
		2138	if (flags)
		2139	#if HAVE_PIPE2
		2140	res = pipe2 (fd, flags);
		2141	#else
		2142	res = (errno = ENOSYS, -1);
		2143	#endif
		2144	else
		2145	res = pipe (fd);
		2146
		2147	if (!res)
		2148	{
		2149	EXTEND (SP, 2);
		2150	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2151	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2152	}
		2153	}
		2154
		2155	UV
		2156	get_fdlimit ()
		2157	CODE:
		2158	#if HAVE_RLIMITS
		2159	struct rlimit rl;
		2160	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2161	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2162	#endif
		2163	XSRETURN_UNDEF;
		2164	OUTPUT:
		2165	RETVAL
		2166
		2167	void
		2168	min_fdlimit (UV limit = 0x7fffffffU)
		2169	CODE:
		2170	{
		2171	#if HAVE_RLIMITS
		2172	struct rlimit rl;
		2173	rlim_t orig_rlim_max;
		2174	UV bit;
		2175
		2176	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2177	goto fail;
		2178
		2179	if (rl.rlim_cur == RLIM_INFINITY)
		2180	XSRETURN_YES;
		2181
		2182	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2183
		2184	if (rl.rlim_cur < limit)
		2185	{
		2186	rl.rlim_cur = limit;
		2187
		2188	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2189	rl.rlim_max = rl.rlim_cur;
		2190	}
		2191
		2192	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2193	XSRETURN_YES;
		2194
		2195	if (errno == EPERM)
		2196	{
		2197	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2198	/* our limit overflows a system-wide limit */
		2199	/* try an adaptive algorithm, but do not lower the hardlimit */
		2200	rl.rlim_max = 0;
		2201	for (bit = 0x40000000U; bit; bit >>= 1)
		2202	{
		2203	rl.rlim_max |= bit;
		2204	rl.rlim_cur = rl.rlim_max;
		2205
		2206	/* nevr decrease the hard limit */
		2207	if (rl.rlim_max < orig_rlim_max)
		2208	break;
		2209
		2210	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2211	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2212	}
		2213
		2214	/* now, raise the soft limit to the max permitted */
		2215	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2216	{
		2217	rl.rlim_cur = rl.rlim_max;
		2218	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2219	errno = EPERM;
		2220	}
		2221	}
		2222	#endif
		2223	fail:
		2224	XSRETURN_UNDEF;
		2225	}
		2226
		2227	void _on_next_submit (SV *cb)
		2228	CODE:
		2229	SvREFCNT_dec (on_next_submit);
		2230	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2231
		2232	PROTOTYPES: DISABLE
		2233
		2234	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2235
		2236	BOOT:
		2237	{
		2238	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2239	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2240	}
		2241
		2242	void
		2243	DESTROY (SV *self)
		2244	CODE:
		2245	{
		2246	aio_wd wd = SvAIO_WD (self);
		2247	#if HAVE_AT
		2248	{
		2249	SV *callback = &PL_sv_undef;
		2250	dREQ; /* clobbers next_pri :/ */
		2251	next_pri = req->pri; /* restore next_pri */
		2252	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2253	req->type = EIO_WD_CLOSE;
		2254	req->wd = wd;
		2255	REQ_SEND;
		2256	}
		2257	#else
		2258	eio_wd_close_sync (wd);
		2259	#endif
		2260	}
		2261
		2262	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2263
		2264	void
		2265	cancel (aio_req_ornot req)
		2266	CODE:
		2267	eio_cancel (req);
		2268
		2269	void
		2270	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2271	PPCODE:
		2272	{
		2273	if (GIMME_V != G_VOID)
		2274	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2275
		2276	if (items > 1)
		2277	{
		2278	SV *cb_cv = get_cb (callback);
		2279
		2280	SvREFCNT_dec (req->callback);
		2281	req->callback = SvREFCNT_inc (cb_cv);
		2282	}
		2283	}
		2284
		2285	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2286
		2287	void
		2288	add (aio_req grp, ...)
		2289	PPCODE:
		2290	{
		2291	int i;
		2292
		2293	if (grp->int1 == 2)
		2294	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2295
		2296	for (i = 1; i < items; ++i )
		2297	{
		2298	aio_req req;
		2299
		2300	if (GIMME_V != G_VOID)
		2301	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2302
		2303	req = SvAIO_REQ (ST (i));
		2304
		2305	if (req)
		2306	eio_grp_add (grp, req);
		2307	}
		2308	}
		2309
		2310	void
		2311	cancel_subs (aio_req_ornot req)
		2312	CODE:
		2313	req_cancel_subs (req);
		2314
		2315	void
		2316	result (aio_req grp, ...)
		2317	CODE:
		2318	{
		2319	int i;
		2320	AV *av;
		2321
		2322	grp->errorno = errno;
		2323
		2324	av = newAV ();
		2325	av_extend (av, items - 1);
		2326
		2327	for (i = 1; i < items; ++i )
		2328	av_push (av, newSVsv (ST (i)));
		2329
		2330	SvREFCNT_dec (grp->sv1);
		2331	grp->sv1 = (SV *)av;
		2332	}
		2333
		2334	void
		2335	errno (aio_req grp, int errorno = errno)
		2336	CODE:
		2337	grp->errorno = errorno;
		2338
		2339	void
		2340	limit (aio_req grp, int limit)
		2341	CODE:
		2342	eio_grp_limit (grp, limit);
		2343
		2344	void
		2345	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2346	CODE:
		2347	{
		2348	SvREFCNT_dec (grp->sv2);
		2349	grp->sv2 = newSVsv (callback);
		2350	grp->feed = aio_grp_feed;
		2351
		2352	if (grp->int2 <= 0)
		2353	grp->int2 = 2;
		2354
		2355	eio_grp_limit (grp, grp->int2);
		2356	}
		2357

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