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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.32 by root, Mon Aug 22 23:20:37 2005 UTC vs.
Revision 1.253 by root, Tue Feb 20 04:32:59 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
10	#include <pthread.h>	11	#include <stddef.h>
11		12	#include <stdlib.h>
		13	#include <errno.h>
12	#include <sys/types.h>	14	#include <sys/types.h>
13	#include <sys/stat.h>	15	#include <sys/stat.h>
14
15	#include <unistd.h>	16	#include <limits.h>
16	#include <fcntl.h>	17	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	18	#include <sched.h>
19		19
20	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
21	# if __linux
22	# include <sys/sendfile.h>
23	# elif __freebsd
24	# include <sys/socket.h>
25	# include <sys/uio.h>	21	# include <sys/mman.h>
26	# elif __hpux	22	#endif
27	# include <sys/socket.h>	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
28	# endif	35	# endif
29	#endif	36	#endif
30		37
31	#if __ia64	38	/* perl namespace pollution */
32	# define STACKSIZE 65536	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
33	#else	84	#else
34	# define STACKSIZE 4096	85
		86	#include <sys/time.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_EVENTFD
		112	# include <sys/eventfd.h>
		113	#endif
		114
		115	#if HAVE_RLIMITS
		116	#include <sys/time.h>
		117	#include <sys/resource.h>
		118	#endif
		119
		120	typedef SV SV8; /* byte-sv, used for argument-checking */
		121	typedef int aio_rfd; /* read file desriptor */
		122	typedef int aio_wfd; /* write file descriptor */
		123
		124	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		125
		126	#define EIO_REQ_MEMBERS \
		127	SV *callback; \
		128	SV *sv1, *sv2; \
		129	SV *sv3, *sv4; \
		130	STRLEN stroffset; \
		131	SV *self;
		132
		133	#define EIO_NO_WRAPPERS 1
		134
		135	#include "libeio/eio.h"
		136
		137	static int req_invoke (eio_req *req);
		138	#define EIO_FINISH(req) req_invoke (req)
		139	static void req_destroy (eio_req *grp);
		140	#define EIO_DESTROY(req) req_destroy (req)
		141
		142	#include "libeio/eio.c"
		143
		144	#if !HAVE_POSIX_FADVISE
		145	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#if !HAVE_POSIX_MADVISE
		149	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		150	#endif
		151
		152	#ifndef MAP_ANONYMOUS
		153	# ifdef MAP_ANON
		154	# define MAP_ANONYMOUS MAP_ANON
		155	# else
		156	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
35	#endif	157	# endif
		158	#endif
36		159
37	enum {	160	/* defines all sorts of constants to 0 unless they are already defined */
38	REQ_QUIT,	161	/* also provides const_iv_ and const_niv_ macros for them */
39	REQ_OPEN, REQ_CLOSE,	162	#include "def0.h"
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,	163
41	REQ_SENDFILE,	164	#ifndef makedev
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	165	# define makedev(maj,min) (((maj) << 8) | (min))
43	REQ_FSYNC, REQ_FDATASYNC,	166	#endif
44	REQ_UNLINK, REQ_RMDIR,	167	#ifndef major
45	REQ_SYMLINK,	168	# define major(dev) ((dev) >> 8)
		169	#endif
		170	#ifndef minor
		171	# define minor(dev) ((dev) & 0xff)
		172	#endif
		173
		174	#if PAGESIZE <= 0
		175	# define PAGESIZE sysconf (_SC_PAGESIZE)
		176	#endif
		177
		178	/*****************************************************************************/
		179
		180	#if !_POSIX_MAPPED_FILES
		181	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		182	# define munmap(addr,length) EIO_ENOSYS ()
		183	#endif
		184
		185	#if !_POSIX_MEMORY_PROTECTION
		186	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		187	#endif
		188
		189	#define FOREIGN_MAGIC PERL_MAGIC_ext
		190
		191	static int ecb_cold
		192	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		193	{
		194	int old_errno = errno;
		195	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		196	errno = old_errno;
		197
		198	mg->mg_obj = 0; /* just in case */
		199
		200	SvREADONLY_off (sv);
		201
		202	if (SvPVX (sv) != mg->mg_ptr)
		203	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		204
		205	SvCUR_set (sv, 0);
		206	SvPVX (sv) = 0;
		207	SvOK_off (sv);
		208
		209	return 0;
		210	}
		211
		212	static MGVTBL mmap_vtbl = {
		213	0, 0, 0, 0, mmap_free
46	};	214	};
47		215
48	typedef struct aio_cb {	216	static int ecb_cold
49	struct aio_cb *volatile next;	217	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
50
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;
68
69	static int started, wanted;
70	static volatile int nreqs;
71	static int max_outstanding = 1<<30;
72	static int respipe [2];
73
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77
78	static volatile aio_req reqs, reqe; /* queue start, queue end */
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)
82	{	218	{
83	if (req->data)	219	free (mg->mg_ptr);
84	SvREFCNT_dec (req->data);	220	mg->mg_obj = 0; /* just in case */
85		221
86	if (req->fh)	222	SvREADONLY_off (sv);
87	SvREFCNT_dec (req->fh);
88		223
89	if (req->fh2)	224	if (SvPVX (sv) != mg->mg_ptr)
90	SvREFCNT_dec (req->fh2);	225	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
91		226
92	if (req->statdata)	227	SvCUR_set (sv, 0);
93	Safefree (req->statdata);	228	SvPVX (sv) = 0;
		229	SvOK_off (sv);
94		230
95	if (req->callback)	231	return 0;
96	SvREFCNT_dec (req->callback);
97
98	Safefree (req);
99	}	232	}
100		233
		234	static MGVTBL sysfree_vtbl = {
		235	0, 0, 0, 0, sysfree_free
		236	};
		237
		238	/*****************************************************************************/
		239
		240	/* helper: set scalar to foreign ptr with custom free */
101	static void	241	static void
102	poll_wait ()	242	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
103	{	243	{
104	if (nreqs && !ress)	244	sv_force_normal (sv);
105	{
106	fd_set rfd;
107	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);
109		245
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	246	/* we store the length in mg_obj, as namlen is I32 :/ */
111	}	247	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
112	}	248	->mg_obj = (SV *)length;
113		249
		250	SvUPGRADE (sv, SVt_PV); /* nop... */
		251
		252	if (SvLEN (sv))
		253	Safefree (SvPVX (sv));
		254
		255	SvPVX (sv) = (char *)addr;
		256	SvCUR_set (sv, length);
		257	SvLEN_set (sv, 0);
		258	SvPOK_only (sv);
		259	}
		260
114	static int	261	static void
115	poll_cb ()	262	sv_clear_foreign (SV *sv)
116	{	263	{
117	dSP;	264	/* todo: iterate over magic and only free ours, but of course */
		265	/* the perl5porters will call that (correct) behaviour buggy */
		266	sv_unmagic (sv, FOREIGN_MAGIC);
		267	}
		268
		269	/*****************************************************************************/
		270
		271	static void
		272	fiemap (eio_req *req)
		273	{
		274	req->result = -1;
		275
		276	#if HAVE_FIEMAP
		277	/* assume some c99 */
		278	struct fiemap *fiemap = 0;
		279	size_t end_offset;
		280	int count = req->int3;
		281
		282	req->flags |= EIO_FLAG_PTR1_FREE;
		283
		284	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		285	/* increase in 3.5kb steps */
		286	if (count < 0)
118	int count = 0;	287	count = 8;
119	int do_croak = 0;	288
120	aio_req req;	289	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		290	errno = ENOMEM;
		291	if (!fiemap)
		292	return;
		293
		294	req->ptr1 = fiemap;
		295
		296	fiemap->fm_start = req->offs;
		297	fiemap->fm_length = req->size;
		298	fiemap->fm_flags = req->int2;
		299	fiemap->fm_extent_count = count;
		300
		301	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		302	return;
		303
		304	if (req->int3 >= 0 /* not autosizing */
		305	|| !fiemap->fm_mapped_extents /* no more extents */
		306	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		307	goto done;
		308
		309	/* else we have to loop -
		310	* it would be tempting (actually I tried that first) to just query the
		311	* number of extents needed, but linux often feels like not returning all
		312	* extents, without telling us it left any out. this complicates
		313	* this quite a bit.
		314	*/
		315
		316	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
121		317
122	for (;;)	318	for (;;)
123	{	319	{
124	pthread_mutex_lock (&reslock);	320	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
125	req = ress;	321	char scratch[3072];
		322	struct fiemap *incmap = (struct fiemap *)scratch;
126		323
		324	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		325	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		326	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		327	incmap->fm_flags = fiemap->fm_flags;
		328	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		329
		330	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		331	return;
		332
		333	if (!incmap->fm_mapped_extents)
		334	goto done;
		335
		336	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		337	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		338	errno = ENOMEM;
127	if (req)	339	if (!fiemap)
		340	return;
		341
		342	req->ptr1 = fiemap;
		343
		344	for (count = 0; count < incmap->fm_mapped_extents; ++count)
128	{	345	{
129	ress = req->next;	346	struct fiemap_extent *e = incmap->fm_extents + count;
130		347
131	if (!ress)	348	if (e->fe_logical + e->fe_length >= end_offset)
132	{	349	goto done;
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137		350
138	rese = 0;	351	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
139	}	352
		353	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		354	goto done;
		355
140	}	356	}
		357	}
141		358
142	pthread_mutex_unlock (&reslock);	359	done:
		360	req->result = 0;
143		361
144	if (!req)	362	#else
145	break;	363	errno = ENOSYS;
		364	#endif
		365	}
146		366
147	nreqs--;	367	/*****************************************************************************/
148		368
149	if (req->type == REQ_QUIT)	369	enum {
150	started--;	370	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
151	else	371	};
		372
		373	typedef eio_req *aio_req;
		374	typedef eio_req *aio_req_ornot;
		375	typedef eio_wd aio_wd;
		376
		377	static SV *on_next_submit;
		378	static int next_pri = EIO_PRI_DEFAULT;
		379	static int max_outstanding;
		380
		381	static s_epipe respipe;
		382
		383	static void req_destroy (aio_req req);
		384	static void req_cancel (aio_req req);
		385
		386	static void
		387	want_poll (void)
		388	{
		389	/* write a dummy byte to the pipe so fh becomes ready */
		390	s_epipe_signal (&respipe);
		391	}
		392
		393	static void
		394	done_poll (void)
		395	{
		396	/* read any signals sent by the worker threads */
		397	s_epipe_drain (&respipe);
		398	}
		399
		400	/* must be called at most once */
		401	static SV *
		402	req_sv (aio_req req, HV *stash)
		403	{
		404	if (!req->self)
		405	{
		406	req->self = (SV *)newHV ();
		407	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		408	}
		409
		410	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		411	}
		412
		413	static SV *
		414	newSVaio_wd (aio_wd wd)
		415	{
		416	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		417	}
		418
		419	static aio_req
		420	SvAIO_REQ (SV *sv)
		421	{
		422	MAGIC *mg;
		423
		424	if (!SvROK (sv)
		425	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		426	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		427	&& SvSTASH (SvRV (sv)) != aio_req_stash
		428	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		429	croak ("object of class IO::AIO::REQ expected");
		430
		431	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		432
		433	return mg ? (aio_req)mg->mg_ptr : 0;
		434	}
		435
		436	static aio_wd
		437	SvAIO_WD (SV *sv)
		438	{
		439	if (!SvROK (sv)
		440	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		441	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		442	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		443
		444	return (aio_wd)(long)SvIVX (SvRV (sv));
		445	}
		446
		447	static SV *
		448	newmortalFH (int fd, int flags)
		449	{
		450	if (fd < 0)
		451	return &PL_sv_undef;
		452
		453	GV *gv = (GV *)sv_newmortal ();
		454	char sym[64];
		455	int symlen;
		456
		457	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		458	gv_init (gv, aio_stash, sym, symlen, 0);
		459
		460	symlen = snprintf (
		461	sym,
		462	sizeof (sym),
		463	"%s&=%d",
		464	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		465	fd
		466	);
		467
		468	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		469	? (SV *)gv : &PL_sv_undef;
		470	}
		471
		472	static void
		473	aio_grp_feed (aio_req grp)
		474	{
		475	if (grp->sv2 && SvOK (grp->sv2))
		476	{
		477	dSP;
		478
		479	ENTER;
		480	SAVETMPS;
		481	PUSHMARK (SP);
		482	XPUSHs (req_sv (grp, aio_grp_stash));
		483	PUTBACK;
		484	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		485	SPAGAIN;
		486	FREETMPS;
		487	LEAVE;
		488	}
		489	}
		490
		491	static void
		492	req_submit (eio_req *req)
		493	{
		494	eio_submit (req);
		495
		496	if (expect_false (on_next_submit))
		497	{
		498	dSP;
		499	SV *cb = sv_2mortal (on_next_submit);
		500
		501	on_next_submit = 0;
		502
		503	PUSHMARK (SP);
		504	PUTBACK;
		505	call_sv (cb, G_DISCARD | G_EVAL);
		506	}
		507	}
		508
		509	static int
		510	req_invoke (eio_req *req)
		511	{
		512	if (req->flags & FLAG_SV2_RO_OFF)
		513	SvREADONLY_off (req->sv2);
		514
		515	if (!EIO_CANCELLED (req) && req->callback)
		516	{
		517	dSP;
		518	static SV *sv_result_cache; /* caches the result integer SV */
		519	SV *sv_result;
		520
		521	ENTER;
		522	SAVETMPS;
		523	PUSHMARK (SP);
		524	EXTEND (SP, 1);
		525
		526	/* do not recreate the result IV from scratch each time */
		527	if (expect_true (sv_result_cache))
152	{	528	{
153	int errorno = errno;	529	sv_result = sv_result_cache; sv_result_cache = 0;
154	errno = req->errorno;	530	SvIV_set (sv_result, req->result);
155		531	SvIOK_only (sv_result);
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);
198	}
199	}
200
201	LEAVE;
202
203	errno = errorno;
204	count++;
205	}
206
207	free_req (req);
208	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}
329
330	static void atfork_child (void)
331	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();
357
358	atfork_parent ();
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 iolock = 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 (&iolock);
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 (&iolock);
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 (&iolock);
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 (&iolock);
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 char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
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	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	res = sbytes;
456	}
457
458	#elif __hpux
459	res = sendfile (ofd, ifd, offset, count, 0, 0);
460
461	#else
462	res = -1;
463	errno = ENOSYS;
464	#endif
465
466	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
467	{
468	/* emulate sendfile. this is a major pain in the ass */
469	char *buf = malloc (4096);
470	res = 0;
471
472	for (;;)
473	{
474	ssize_t cnt;
475
476	cnt = pread (ifd, buf, 4096, offset);
477
478	if (cnt <= 0)
479	{
480	if (cnt && !res) res = -1;
481	break;
482	}
483
484	cnt = write (ofd, buf, cnt);
485
486	if (cnt <= 0)
487	{
488	if (cnt && !res) res = -1;
489	break;
490	}
491
492	offset += cnt;
493	res += cnt;
494	}
495
496	{
497	int errorno = errno;
498	free (buf);
499	errno = errorno;
500	}
501	}
502
503	return res;
504	}
505
506	/*****************************************************************************/
507
508	static void *
509	aio_proc (void *thr_arg)
510	{
511	aio_req req;
512	int type;
513
514	do
515	{
516	pthread_mutex_lock (&reqlock);
517
518	for (;;)
519	{
520	req = reqs;
521
522	if (reqs)
523	{
524	reqs = reqs->next;
525	if (!reqs) reqe = 0;
526	}
527
528	if (req)
529	break;
530
531	pthread_cond_wait (&reqwait, &reqlock);
532	}
533
534	pthread_mutex_unlock (&reqlock);
535
536	errno = 0; /* strictly unnecessary */
537
538	type = req->type;
539
540	switch (type)
541	{
542	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
543	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
544
545	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
546	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
547
548	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
549	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
550	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
551
552	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
553	case REQ_CLOSE: req->result = close (req->fd); break;
554	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
556	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
557
558	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
559	case REQ_FSYNC: req->result = fsync (req->fd); break;
560
561	case REQ_QUIT:
562	break;
563
564	default:
565	req->result = ENOSYS;
566	break;
567	}
568
569	req->errorno = errno;
570
571	pthread_mutex_lock (&reslock);
572
573	req->next = 0;
574
575	if (rese)
576	{
577	rese->next = req;
578	rese = req;
579	}	532	}
580	else	533	else
581	{	534	{
582	rese = ress = req;	535	sv_result = newSViv (req->result);
583		536	SvREADONLY_on (sv_result);
584	/* write a dummy byte to the pipe so fh becomes ready */
585	write (respipe [1], &respipe, 1);
586	}	537	}
587		538
588	pthread_mutex_unlock (&reslock);	539	switch (req->type)
		540	{
		541	case EIO_WD_OPEN:
		542	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		543	break;
		544
		545	case EIO_READDIR:
		546	{
		547	SV *rv = &PL_sv_undef;
		548
		549	if (req->result >= 0)
		550	{
		551	int i;
		552	char *names = (char *)req->ptr2;
		553	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		554	AV *av = newAV ();
		555
		556	av_extend (av, req->result - 1);
		557
		558	for (i = 0; i < req->result; ++i)
		559	{
		560	if (req->int1 & EIO_READDIR_DENTS)
		561	{
		562	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		563
		564	if (req->int1 & EIO_READDIR_CUSTOM2)
		565	{
		566	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		567	AV *avent = newAV ();
		568
		569	av_extend (avent, 2);
		570
		571	if (!sv_type [ent->type])
		572	{
		573	sv_type [ent->type] = newSViv (ent->type);
		574	SvREADONLY_on (sv_type [ent->type]);
		575	}
		576
		577	av_store (avent, 0, namesv);
		578	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		579	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		580
		581	av_store (av, i, newRV_noinc ((SV *)avent));
		582	}
		583	else
		584	av_store (av, i, namesv);
		585
		586	++ent;
		587	}
		588	else
		589	{
		590	SV *name = newSVpv (names, 0);
		591	av_store (av, i, name);
		592	names += SvCUR (name) + 1;
		593	}
		594	}
		595
		596	rv = sv_2mortal (newRV_noinc ((SV *)av));
		597	}
		598
		599	PUSHs (rv);
		600
		601	if (req->int1 & EIO_READDIR_CUSTOM1)
		602	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		603	}
		604	break;
		605
		606	case EIO_OPEN:
		607	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		608	break;
		609
		610	case EIO_STATVFS:
		611	case EIO_FSTATVFS:
		612	{
		613	SV *rv = &PL_sv_undef;
		614
		615	#ifndef _WIN32
		616	if (req->result >= 0)
		617	{
		618	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		619	HV *hv = newHV ();
		620	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		621	* chooses to make it a struct.
		622	*/
		623	unsigned long fsid = 0;
		624	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		625
		626	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		627
		628	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		629	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		630	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		631	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		632	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		633	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		634	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		635	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		636	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		637	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		638	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		639	}
		640	#endif
		641
		642	PUSHs (rv);
		643	}
		644
		645	break;
		646
		647	case EIO_GROUP:
		648	req->int1 = 2; /* mark group as finished */
		649
		650	if (req->sv1)
		651	{
		652	int i;
		653	AV *av = (AV *)req->sv1;
		654
		655	EXTEND (SP, AvFILL (av) + 1);
		656	for (i = 0; i <= AvFILL (av); ++i)
		657	PUSHs (*av_fetch (av, i, 0));
		658	}
		659	break;
		660
		661	case EIO_NOP:
		662	case EIO_BUSY:
		663	break;
		664
		665	case EIO_READLINK:
		666	case EIO_REALPATH:
		667	if (req->result > 0)
		668	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		669	break;
		670
		671	case EIO_STAT:
		672	case EIO_LSTAT:
		673	case EIO_FSTAT:
		674	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		675
		676	if (!(PL_laststatval = req->result))
		677	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		678	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		679
		680	PUSHs (sv_result);
		681	break;
		682
		683	case EIO_SEEK:
		684	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		685	break;
		686
		687	case EIO_READ:
		688	{
		689	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		690	*SvEND (req->sv2) = 0;
		691	SvPOK_only (req->sv2);
		692	SvSETMAGIC (req->sv2);
		693	PUSHs (sv_result);
		694	}
		695	break;
		696
		697	case EIO_SLURP:
		698	{
		699	if (req->result >= 0)
		700	{
		701	/* if length was originally not known, we steal the malloc'ed memory */
		702	if (req->flags & EIO_FLAG_PTR2_FREE)
		703	{
		704	req->flags &= ~EIO_FLAG_PTR2_FREE;
		705	sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
		706	}
		707	else
		708	{
		709	SvCUR_set (req->sv2, req->result);
		710	*SvEND (req->sv2) = 0;
		711	SvPOK_only (req->sv2);
		712	}
		713
		714	SvSETMAGIC (req->sv2);
		715	}
		716
		717	PUSHs (sv_result);
		718	}
		719	break;
		720
		721	case EIO_CUSTOM:
		722	if (req->feed == fiemap)
		723	{
		724	#if HAVE_FIEMAP
		725	if (!req->result)
		726	{
		727	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		728
		729	if (fiemap->fm_extent_count)
		730	{
		731	AV *av = newAV ();
		732	int i;
		733
		734	while (fiemap->fm_mapped_extents)
		735	{
		736	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		737	AV *ext_av = newAV ();
		738
		739	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		740	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		741	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		742	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		743
		744	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		745	}
		746
		747	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		748	}
		749	else
		750	{
		751	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		752	PUSHs (sv_result);
		753	}
		754	}
		755	#endif
		756	}
		757	else
		758	PUSHs (sv_result);
		759	break;
		760
		761	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		762	if (req->result > 0)
		763	SvIV_set (sv_result, 0);
		764	/* FALLTHROUGH */
		765
		766	default:
		767	PUSHs (sv_result);
		768	break;
		769	}
		770
		771	errno = req->errorno;
		772
		773	PUTBACK;
		774	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		775	SPAGAIN;
		776
		777	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		778	SvREFCNT_dec (sv_result);
		779	else
		780	sv_result_cache = sv_result;
		781
		782	FREETMPS;
		783	LEAVE;
		784
		785	PUTBACK;
589	}	786	}
590	while (type != REQ_QUIT);
591		787
		788	return !!SvTRUE (ERRSV);
		789	}
		790
		791	static void
		792	req_destroy (aio_req req)
		793	{
		794	if (req->self)
		795	{
		796	sv_unmagic (req->self, PERL_MAGIC_ext);
		797	SvREFCNT_dec (req->self);
		798	}
		799
		800	SvREFCNT_dec (req->sv1);
		801	SvREFCNT_dec (req->sv2);
		802	SvREFCNT_dec (req->sv3);
		803	SvREFCNT_dec (req->sv4);
		804	SvREFCNT_dec (req->callback);
		805
		806	free (req);
		807	}
		808
		809	static void
		810	req_cancel_subs (aio_req grp)
		811	{
		812	if (grp->type != EIO_GROUP)
		813	return;
		814
		815	SvREFCNT_dec (grp->sv2);
		816	grp->sv2 = 0;
		817
		818	eio_grp_cancel (grp);
		819	}
		820
		821	static void ecb_cold
		822	create_respipe (void)
		823	{
		824	if (s_epipe_renew (&respipe))
		825	croak ("IO::AIO: unable to initialize result pipe");
		826	}
		827
		828	static void
		829	poll_wait (void)
		830	{
		831	while (eio_nreqs ())
		832	{
		833	int size;
		834
		835	X_LOCK (EIO_POOL->reslock);
		836	size = EIO_POOL->res_queue.size;
		837	X_UNLOCK (EIO_POOL->reslock);
		838
		839	if (size)
		840	return;
		841
		842	etp_maybe_start_thread (EIO_POOL);
		843
		844	s_epipe_wait (&respipe);
		845	}
		846	}
		847
		848	static int
		849	poll_cb (void)
		850	{
		851	for (;;)
		852	{
		853	int res = eio_poll ();
		854
		855	if (res > 0)
		856	croak (0);
		857
		858	if (!max_outstanding || max_outstanding > eio_nreqs ())
		859	return res;
		860
		861	poll_wait ();
		862	}
		863	}
		864
		865	static void ecb_cold
		866	reinit (void)
		867	{
		868	create_respipe ();
		869
		870	if (eio_init (want_poll, done_poll) < 0)
		871	croak ("IO::AIO: unable to initialise eio library");
		872	}
		873
		874	/*****************************************************************************/
		875
		876	static SV *
		877	get_cb (SV *cb_sv)
		878	{
		879	SvGETMAGIC (cb_sv);
		880	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		881	}
		882
		883	static aio_req ecb_noinline
		884	dreq (SV *callback)
		885	{
		886	SV *cb_cv;
		887	aio_req req;
		888	int req_pri = next_pri;
		889	next_pri = EIO_PRI_DEFAULT;
		890
		891	cb_cv = get_cb (callback);
		892
		893	req = calloc (sizeof (*req), 1);
		894	if (!req)
		895	croak ("out of memory during eio_req allocation");
		896
		897	req->callback = SvREFCNT_inc (cb_cv);
		898	req->pri = req_pri;
		899
592	return 0;	900	return req;
593	}	901	}
594		902
595	#define dREQ \	903	#define dREQ \
596	aio_req req; \	904	aio_req req = dreq (callback); \
		905
		906	#define REQ_SEND \
		907	PUTBACK; \
		908	req_submit (req); \
		909	SPAGAIN; \
597	\	910	\
598	if (SvOK (callback) && !SvROK (callback)) \	911	if (GIMME_V != G_VOID) \
599	croak ("clalback must be undef or of reference type"); \	912	XPUSHs (req_sv (req, aio_req_stash));
600	\	913
601	Newz (0, req, 1, aio_cb); \	914	ecb_inline void
602	if (!req) \	915	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
603	croak ("out of memory during aio_req allocation"); \	916	{
604	\	917	if (expect_false (SvROK (path)))
605	req->callback = newSVsv (callback);	918	{
606		919	SV *rv = SvRV (path);
		920	SV *wdob;
		921
		922	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		923	{
		924	path = AvARRAY (rv)[1];
		925	wdob = AvARRAY (rv)[0];
		926
		927	if (SvOK (wdob))
		928	{
		929	*wd = SvAIO_WD (wdob);
		930	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		931	}
		932	else
		933	*wd = EIO_INVALID_WD;
		934	}
		935	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		936	{
		937	*wd = (aio_wd)(long)SvIVX (rv);
		938	*wdsv = SvREFCNT_inc_NN (rv);
		939	*ptr = ".";
		940	return; /* path set to "." */
		941	}
		942	else
		943	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		944	}
		945
		946	*pathsv = newSVsv (path);
		947	*ptr = SvPVbyte_nolen (*pathsv);
		948	}
		949
		950	static void ecb_noinline
		951	req_set_path1 (aio_req req, SV *path)
		952	{
		953	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		954	}
		955
		956	static void ecb_noinline
		957	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		958	{
		959	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		960
		961	switch (SvTYPE (rv))
		962	{
		963	case SVt_PVIO:
		964	case SVt_PVLV:
		965	case SVt_PVGV:
		966	req->type = type_fh;
		967	req->sv1 = newSVsv (fh_or_path);
		968	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		969	break;
		970
		971	default:
		972	req->type = type_path;
		973	req_set_path1 (req, fh_or_path);
		974	break;
		975	}
		976	}
		977
		978	XS(boot_IO__AIO) ecb_cold;
		979
607	MODULE = IO::AIO PACKAGE = IO::AIO	980	MODULE = IO::AIO PACKAGE = IO::AIO
608		981
609	PROTOTYPES: ENABLE	982	PROTOTYPES: ENABLE
610		983
611	BOOT:	984	BOOT:
612	{	985	{
613	create_pipe ();	986	static const struct {
614	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	987	const char *name;
615	}	988	IV iv;
		989	} *civ, const_iv[] = {
		990	# define const_niv(name, value) { # name, (IV) value },
		991	# define const_iv(name) { # name, (IV) name },
		992	# define const_eio(name) { # name, (IV) EIO_ ## name },
616		993
		994	/* you have to re-run ./gendef0 after adding/removing any constants here */
		995	/* the first block can be undef if missing */
		996	const_iv (ENOSYS)
		997	const_iv (EXDEV)
		998	const_iv (EBADR)
		999
		1000	/* for lseek */
		1001	const_iv (SEEK_DATA)
		1002	const_iv (SEEK_HOLE)
		1003
		1004	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		1005	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		1006	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		1007	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		1008	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		1009	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		1010
		1011	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		1012	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		1013	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		1014	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1015	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		1016
		1017	/* the second block will be 0 when missing */
		1018	const_iv (O_RDONLY)
		1019	const_iv (O_WRONLY)
		1020	const_iv (O_RDWR)
		1021	const_iv (O_CREAT)
		1022	const_iv (O_TRUNC)
		1023	const_iv (O_EXCL)
		1024	const_iv (O_APPEND)
		1025
		1026	const_iv (O_ASYNC)
		1027	const_iv (O_DIRECT)
		1028	const_iv (O_NOATIME)
		1029
		1030	const_iv (O_CLOEXEC)
		1031	const_iv (O_NOCTTY)
		1032	const_iv (O_NOFOLLOW)
		1033	const_iv (O_NONBLOCK)
		1034	const_iv (O_EXEC)
		1035	const_iv (O_SEARCH)
		1036	const_iv (O_DIRECTORY)
		1037	const_iv (O_DSYNC)
		1038	const_iv (O_RSYNC)
		1039	const_iv (O_SYNC)
		1040	const_iv (O_PATH)
		1041	const_iv (O_TMPFILE)
		1042	const_iv (O_TTY_INIT)
		1043
		1044	const_iv (S_IFIFO)
		1045	const_iv (S_IFCHR)
		1046	const_iv (S_IFBLK)
		1047	const_iv (S_IFLNK)
		1048	const_iv (S_IFREG)
		1049	const_iv (S_IFDIR)
		1050	const_iv (S_IFWHT)
		1051	const_iv (S_IFSOCK)
		1052	const_iv (S_IFMT)
		1053
		1054	const_iv (ST_RDONLY)
		1055	const_iv (ST_NOSUID)
		1056	const_iv (ST_NODEV)
		1057	const_iv (ST_NOEXEC)
		1058	const_iv (ST_SYNCHRONOUS)
		1059	const_iv (ST_MANDLOCK)
		1060	const_iv (ST_WRITE)
		1061	const_iv (ST_APPEND)
		1062	const_iv (ST_IMMUTABLE)
		1063	const_iv (ST_NOATIME)
		1064	const_iv (ST_NODIRATIME)
		1065	const_iv (ST_RELATIME)
		1066
		1067	const_iv (PROT_NONE)
		1068	const_iv (PROT_EXEC)
		1069	const_iv (PROT_READ)
		1070	const_iv (PROT_WRITE)
		1071
		1072	const_iv (MAP_PRIVATE)
		1073	const_iv (MAP_SHARED)
		1074	const_iv (MAP_FIXED)
		1075	const_iv (MAP_ANONYMOUS)
		1076
		1077	/* linuxish */
		1078	const_iv (MAP_LOCKED)
		1079	const_iv (MAP_NORESERVE)
		1080	const_iv (MAP_POPULATE)
		1081	const_iv (MAP_NONBLOCK)
		1082	const_iv (MAP_GROWSDOWN)
		1083	const_iv (MAP_32BIT)
		1084	const_iv (MAP_HUGETLB)
		1085	const_iv (MAP_STACK)
		1086
		1087	const_iv (F_DUPFD_CLOEXEC)
		1088
		1089	const_iv (F_OFD_GETLK)
		1090	const_iv (F_OFD_SETLK)
		1091	const_iv (F_OFD_GETLKW)
		1092
		1093	const_iv (FIFREEZE)
		1094	const_iv (FITHAW)
		1095	const_iv (FITRIM)
		1096	const_iv (FICLONE)
		1097	const_iv (FICLONERANGE)
		1098	const_iv (FIDEDUPERANGE)
		1099
		1100	const_iv (FS_IOC_GETFLAGS)
		1101	const_iv (FS_IOC_SETFLAGS)
		1102	const_iv (FS_IOC_GETVERSION)
		1103	const_iv (FS_IOC_SETVERSION)
		1104	const_iv (FS_IOC_FIEMAP)
		1105	const_iv (FS_IOC_FSGETXATTR)
		1106	const_iv (FS_IOC_FSSETXATTR)
		1107	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1108	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1109	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1110
		1111	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1112
		1113	const_iv (FS_SECRM_FL)
		1114	const_iv (FS_UNRM_FL)
		1115	const_iv (FS_COMPR_FL)
		1116	const_iv (FS_SYNC_FL)
		1117	const_iv (FS_IMMUTABLE_FL)
		1118	const_iv (FS_APPEND_FL)
		1119	const_iv (FS_NODUMP_FL)
		1120	const_iv (FS_NOATIME_FL)
		1121	const_iv (FS_DIRTY_FL)
		1122	const_iv (FS_COMPRBLK_FL)
		1123	const_iv (FS_NOCOMP_FL)
		1124	const_iv (FS_ENCRYPT_FL)
		1125	const_iv (FS_BTREE_FL)
		1126	const_iv (FS_INDEX_FL)
		1127	const_iv (FS_JOURNAL_DATA_FL)
		1128	const_iv (FS_NOTAIL_FL)
		1129	const_iv (FS_DIRSYNC_FL)
		1130	const_iv (FS_TOPDIR_FL)
		1131	const_iv (FS_FL_USER_MODIFIABLE)
		1132
		1133	const_iv (FS_XFLAG_REALTIME)
		1134	const_iv (FS_XFLAG_PREALLOC)
		1135	const_iv (FS_XFLAG_IMMUTABLE)
		1136	const_iv (FS_XFLAG_APPEND)
		1137	const_iv (FS_XFLAG_SYNC)
		1138	const_iv (FS_XFLAG_NOATIME)
		1139	const_iv (FS_XFLAG_NODUMP)
		1140	const_iv (FS_XFLAG_RTINHERIT)
		1141	const_iv (FS_XFLAG_PROJINHERIT)
		1142	const_iv (FS_XFLAG_NOSYMLINKS)
		1143	const_iv (FS_XFLAG_EXTSIZE)
		1144	const_iv (FS_XFLAG_EXTSZINHERIT)
		1145	const_iv (FS_XFLAG_NODEFRAG)
		1146	const_iv (FS_XFLAG_FILESTREAM)
		1147	const_iv (FS_XFLAG_DAX)
		1148	const_iv (FS_XFLAG_HASATTR)
		1149
		1150	const_iv (FIEMAP_FLAG_SYNC)
		1151	const_iv (FIEMAP_FLAG_XATTR)
		1152	const_iv (FIEMAP_FLAGS_COMPAT)
		1153	const_iv (FIEMAP_EXTENT_LAST)
		1154	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1155	const_iv (FIEMAP_EXTENT_DELALLOC)
		1156	const_iv (FIEMAP_EXTENT_ENCODED)
		1157	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1158	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1159	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1160	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1161	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1162	const_iv (FIEMAP_EXTENT_MERGED)
		1163	const_iv (FIEMAP_EXTENT_SHARED)
		1164
		1165	const_iv (SPLICE_F_MOVE)
		1166	const_iv (SPLICE_F_NONBLOCK)
		1167	const_iv (SPLICE_F_MORE)
		1168	const_iv (SPLICE_F_GIFT)
		1169
		1170	const_iv (EFD_CLOEXEC)
		1171	const_iv (EFD_NONBLOCK)
		1172	const_iv (EFD_SEMAPHORE)
		1173
		1174	/* these are libeio constants, and are independent of gendef0 */
		1175	const_eio (SEEK_SET)
		1176	const_eio (SEEK_CUR)
		1177	const_eio (SEEK_END)
		1178
		1179	const_eio (MCL_FUTURE)
		1180	const_eio (MCL_CURRENT)
		1181
		1182	const_eio (MS_ASYNC)
		1183	const_eio (MS_INVALIDATE)
		1184	const_eio (MS_SYNC)
		1185
		1186	const_eio (MT_MODIFY)
		1187
		1188	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1189	const_eio (SYNC_FILE_RANGE_WRITE)
		1190	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1191
		1192	const_eio (FALLOC_FL_KEEP_SIZE)
		1193	const_eio (FALLOC_FL_PUNCH_HOLE)
		1194	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1195	const_eio (FALLOC_FL_ZERO_RANGE)
		1196	const_eio (FALLOC_FL_INSERT_RANGE)
		1197	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1198
		1199	const_eio (RENAME_NOREPLACE)
		1200	const_eio (RENAME_EXCHANGE)
		1201	const_eio (RENAME_WHITEOUT)
		1202
		1203	const_eio (READDIR_DENTS)
		1204	const_eio (READDIR_DIRS_FIRST)
		1205	const_eio (READDIR_STAT_ORDER)
		1206	const_eio (READDIR_FOUND_UNKNOWN)
		1207
		1208	const_eio (DT_UNKNOWN)
		1209	const_eio (DT_FIFO)
		1210	const_eio (DT_CHR)
		1211	const_eio (DT_DIR)
		1212	const_eio (DT_BLK)
		1213	const_eio (DT_REG)
		1214	const_eio (DT_LNK)
		1215	const_eio (DT_SOCK)
		1216	const_eio (DT_WHT)
		1217	};
		1218
		1219	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1220	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1221	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1222	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1223
		1224	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1225	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1226
		1227	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1228
		1229	reinit ();
		1230	}
		1231
617	void	1232	void
618	min_parallel(nthreads)	1233	reinit ()
619	int nthreads	1234	PROTOTYPE:
		1235
		1236	void
		1237	max_poll_reqs (unsigned int nreqs)
620	PROTOTYPE: $	1238	PROTOTYPE: $
		1239	CODE:
		1240	eio_set_max_poll_reqs (nreqs);
621		1241
622	void	1242	void
623	max_parallel(nthreads)	1243	max_poll_time (double nseconds)
624	int nthreads
625	PROTOTYPE: $	1244	PROTOTYPE: $
626
627	int
628	max_outstanding(nreqs)
629	int nreqs
630	PROTOTYPE: $
631	CODE:	1245	CODE:
632	RETVAL = max_outstanding;	1246	eio_set_max_poll_time (nseconds);
		1247
		1248	void
		1249	min_parallel (unsigned int nthreads)
		1250	PROTOTYPE: $
		1251	CODE:
		1252	eio_set_min_parallel (nthreads);
		1253
		1254	void
		1255	max_parallel (unsigned int nthreads)
		1256	PROTOTYPE: $
		1257	CODE:
		1258	eio_set_max_parallel (nthreads);
		1259
		1260	void
		1261	max_idle (unsigned int nthreads)
		1262	PROTOTYPE: $
		1263	CODE:
		1264	eio_set_max_idle (nthreads);
		1265
		1266	void
		1267	idle_timeout (unsigned int seconds)
		1268	PROTOTYPE: $
		1269	CODE:
		1270	eio_set_idle_timeout (seconds);
		1271
		1272	void
		1273	max_outstanding (unsigned int maxreqs)
		1274	PROTOTYPE: $
		1275	CODE:
633	max_outstanding = nreqs;	1276	max_outstanding = maxreqs;
634		1277
635	void	1278	void
636	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1279	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
637	SV * pathname
638	int flags
639	int mode
640	SV * callback
641	PROTOTYPE: $$$;$
642	CODE:	1280	PPCODE:
643	{	1281	{
644	dREQ;	1282	dREQ;
645		1283
		1284	req->type = EIO_WD_OPEN;
		1285	req_set_path1 (req, pathname);
		1286
		1287	REQ_SEND;
		1288	}
		1289
		1290	void
		1291	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1292	PPCODE:
		1293	{
		1294	dREQ;
		1295
646	req->type = REQ_OPEN;	1296	req->type = EIO_OPEN;
647	req->data = newSVsv (pathname);	1297	req_set_path1 (req, pathname);
648	req->dataptr = SvPVbyte_nolen (req->data);
649	req->fd = flags;	1298	req->int1 = flags;
650	req->mode = mode;	1299	req->int2 = mode;
651		1300
652	send_req (req);	1301	REQ_SEND;
653	}	1302	}
654		1303
655	void	1304	void
656	aio_close(fh,callback=&PL_sv_undef)	1305	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
657	SV * fh
658	SV * callback
659	PROTOTYPE: $;$
660	ALIAS:	1306	ALIAS:
661	aio_close = REQ_CLOSE
662	aio_fsync = REQ_FSYNC	1307	aio_fsync = EIO_FSYNC
663	aio_fdatasync = REQ_FDATASYNC	1308	aio_fdatasync = EIO_FDATASYNC
		1309	aio_syncfs = EIO_SYNCFS
664	CODE:	1310	PPCODE:
665	{	1311	{
		1312	int fd = s_fileno_croak (fh, 0);
666	dREQ;	1313	dREQ;
667		1314
668	req->type = ix;	1315	req->type = ix;
669	req->fh = newSVsv (fh);	1316	req->sv1 = newSVsv (fh);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1317	req->int1 = fd;
671		1318
672	send_req (req);	1319	REQ_SEND;
673	}	1320	}
674		1321
675	void	1322	void
		1323	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1324	PPCODE:
		1325	{
		1326	int fd = s_fileno_croak (fh, 0);
		1327	dREQ;
		1328
		1329	req->type = EIO_SYNC_FILE_RANGE;
		1330	req->sv1 = newSVsv (fh);
		1331	req->int1 = fd;
		1332	req->offs = offset;
		1333	req->size = nbytes;
		1334	req->int2 = flags;
		1335
		1336	REQ_SEND;
		1337	}
		1338
		1339	void
		1340	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1341	PPCODE:
		1342	{
		1343	int fd = s_fileno_croak (fh, 0);
		1344	dREQ;
		1345
		1346	req->type = EIO_FALLOCATE;
		1347	req->sv1 = newSVsv (fh);
		1348	req->int1 = fd;
		1349	req->int2 = mode;
		1350	req->offs = offset;
		1351	req->size = len;
		1352
		1353	REQ_SEND;
		1354	}
		1355
		1356	void
		1357	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1358	PPCODE:
		1359	{
		1360	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1361	int fd = s_fileno_croak (fh, 0);
		1362	dREQ;
		1363
		1364	if (expect_false (close_fd < 0))
		1365	{
		1366	int pipefd [2];
		1367
		1368	if (
		1369	#ifdef _WIN32
		1370	_pipe (pipefd, 1, _O_BINARY) < 0
		1371	#else
		1372	pipe (pipefd) < 0
		1373	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1374	#endif
		1375	|| close (pipefd [1]) < 0
		1376	)
		1377	abort (); /*D*/
		1378
		1379	close_fd = pipefd [0];
		1380	}
		1381
		1382	req->type = EIO_DUP2;
		1383	req->int1 = close_fd;
		1384	req->sv2 = newSVsv (fh);
		1385	req->int2 = fd;
		1386
		1387	REQ_SEND;
		1388	}
		1389
		1390	void
		1391	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1392	PPCODE:
		1393	{
		1394	int fd = s_fileno_croak (fh, 0);
		1395	dREQ;
		1396
		1397	req->type = EIO_SEEK;
		1398	req->sv1 = newSVsv (fh);
		1399	req->int1 = fd;
		1400	req->offs = SvVAL64 (offset);
		1401	req->int2 = whence;
		1402
		1403	REQ_SEND;
		1404	}
		1405
		1406	void
676	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1407	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
677	SV * fh
678	UV offset
679	UV length
680	SV * data
681	UV dataoffset
682	SV * callback
683	ALIAS:	1408	ALIAS:
684	aio_read = REQ_READ	1409	aio_read = EIO_READ
685	aio_write = REQ_WRITE	1410	aio_write = EIO_WRITE
686	PROTOTYPE: $$$$$;$
687	CODE:	1411	PPCODE:
688	{	1412	{
689	aio_req req;
690	STRLEN svlen;	1413	STRLEN svlen;
		1414	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
691	char *svptr = SvPVbyte (data, svlen);	1415	char *svptr = SvPVbyte (data, svlen);
692		1416	UV len = SvUV (length);
693	SvUPGRADE (data, SVt_PV);
694	SvPOK_on (data);
695		1417
696	if (dataoffset < 0)	1418	if (dataoffset < 0)
697	dataoffset += svlen;	1419	dataoffset += svlen;
698		1420
699	if (dataoffset < 0 || dataoffset > svlen)	1421	if (dataoffset < 0 || dataoffset > svlen)
700	croak ("data offset outside of string");	1422	croak ("dataoffset outside of data scalar");
701		1423
702	if (ix == REQ_WRITE)	1424	if (ix == EIO_WRITE)
703	{	1425	{
704	/* write: check length and adjust. */	1426	/* write: check length and adjust. */
705	if (length < 0 || length + dataoffset > svlen)	1427	if (!SvOK (length) || len + dataoffset > svlen)
706	length = svlen - dataoffset;	1428	len = svlen - dataoffset;
707	}	1429	}
708	else	1430	else
709	{	1431	{
710	/* read: grow scalar as necessary */	1432	/* read: check type and grow scalar as necessary */
		1433	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
711	svptr = SvGROW (data, length + dataoffset);	1434	svptr = sv_grow (data, len + dataoffset + 1);
		1435	else if (SvCUR (data) < len + dataoffset)
		1436	croak ("length + dataoffset outside of scalar, and cannot grow");
712	}	1437	}
713
714	if (length < 0)
715	croak ("length must not be negative");
716		1438
717	{	1439	{
718	dREQ;	1440	dREQ;
719		1441
720	req->type = ix;	1442	req->type = ix;
721	req->fh = newSVsv (fh);	1443	req->sv1 = newSVsv (fh);
722	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1444	req->int1 = fd;
723	: IoOFP (sv_2io (fh)));	1445	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
724	req->offset = offset;	1446	req->size = len;
725	req->length = length;
726	req->data = SvREFCNT_inc (data);	1447	req->sv2 = SvREFCNT_inc (data);
727	req->dataptr = (char *)svptr + dataoffset;	1448	req->ptr2 = (char *)svptr + dataoffset;
		1449	req->stroffset = dataoffset;
728		1450
729	if (!SvREADONLY (data))	1451	if (!SvREADONLY (data))
730	{	1452	{
731	SvREADONLY_on (data);	1453	SvREADONLY_on (data);
732	req->data2ptr = (void *)data;	1454	req->flags |= FLAG_SV2_RO_OFF;
733	}	1455	}
734		1456
735	send_req (req);	1457	REQ_SEND;
736	}	1458	}
737	}	1459	}
738		1460
739	void	1461	void
740	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1462	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
741	SV * out_fh
742	SV * in_fh
743	UV in_offset
744	UV length
745	SV * callback
746	PROTOTYPE: $$$$;$
747	CODE:
748	{
749	dREQ;
750
751	req->type = REQ_SENDFILE;
752	req->fh = newSVsv (out_fh);
753	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
754	req->fh2 = newSVsv (in_fh);
755	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
756	req->offset = in_offset;
757	req->length = length;
758
759	send_req (req);
760	}
761
762	void
763	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
764	SV * fh
765	UV offset
766	IV length
767	SV * callback
768	PROTOTYPE: $$$;$
769	CODE:
770	{
771	dREQ;
772
773	req->type = REQ_READAHEAD;
774	req->fh = newSVsv (fh);
775	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
776	req->offset = offset;
777	req->length = length;
778
779	send_req (req);
780	}
781
782	void
783	aio_stat(fh_or_path,callback=&PL_sv_undef)
784	SV * fh_or_path
785	SV * callback
786	ALIAS:	1463	ALIAS:
787	aio_stat = REQ_STAT	1464	aio_ioctl = EIO_IOCTL
788	aio_lstat = REQ_LSTAT	1465	aio_fcntl = EIO_FCNTL
789	CODE:	1466	PPCODE:
790	{	1467	{
791	dREQ;	1468	int fd = s_fileno_croak (fh, 0);
		1469	char *svptr;
792		1470
793	New (0, req->statdata, 1, Stat_t);	1471	if (SvPOK (arg) || !SvNIOK (arg))
794	if (!req->statdata)
795	{	1472	{
796	free_req (req);	1473	STRLEN svlen;
797	croak ("out of memory during aio_req->statdata allocation");	1474	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
798	}	1475	#ifdef IOCPARM_LEN
		1476	STRLEN need = IOCPARM_LEN (request);
		1477	#else
		1478	STRLEN need = 256;
		1479	#endif
799		1480
800	if (SvPOK (fh_or_path))	1481	if (svlen < need)
801	{	1482	svptr = SvGROW (arg, need);
802	req->type = ix;
803	req->data = newSVsv (fh_or_path);
804	req->dataptr = SvPVbyte_nolen (req->data);
805	}	1483	}
806	else	1484	else
		1485	svptr = (char *)SvIV (arg);
		1486
807	{	1487	{
		1488	dREQ;
		1489
808	req->type = REQ_FSTAT;	1490	req->type = ix;
809	req->fh = newSVsv (fh_or_path);	1491	req->sv1 = newSVsv (fh);
810	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1492	req->int1 = fd;
		1493	req->int2 = (long)request;
		1494	req->sv2 = SvREFCNT_inc (arg);
		1495	req->ptr2 = svptr;
		1496
		1497	REQ_SEND;
811	}	1498	}
812
813	send_req (req);
814	}	1499	}
815		1500
816	void	1501	void
817	aio_unlink(pathname,callback=&PL_sv_undef)	1502	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
818	SV * pathname
819	SV * callback
820	ALIAS:	1503	ALIAS:
821	aio_unlink = REQ_UNLINK	1504	aio_readlink = EIO_READLINK
822	aio_rmdir = REQ_RMDIR	1505	aio_realpath = EIO_REALPATH
		1506	PPCODE:
		1507	{
		1508	dREQ;
		1509
		1510	req->type = ix;
		1511	req_set_path1 (req, pathname);
		1512
		1513	REQ_SEND;
		1514	}
		1515
		1516	void
		1517	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1518	PPCODE:
		1519	{
		1520	int ifd = s_fileno_croak (in_fh , 0);
		1521	int ofd = s_fileno_croak (out_fh, 1);
		1522	dREQ;
		1523
		1524	req->type = EIO_SENDFILE;
		1525	req->sv1 = newSVsv (out_fh);
		1526	req->int1 = ofd;
		1527	req->sv2 = newSVsv (in_fh);
		1528	req->int2 = ifd;
		1529	req->offs = in_offset;
		1530	req->size = length;
		1531
		1532	REQ_SEND;
		1533	}
		1534
		1535	void
		1536	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1537	PPCODE:
		1538	{
		1539	int fd = s_fileno_croak (fh, 0);
		1540	dREQ;
		1541
		1542	req->type = EIO_READAHEAD;
		1543	req->sv1 = newSVsv (fh);
		1544	req->int1 = fd;
		1545	req->offs = offset;
		1546	req->size = length;
		1547
		1548	REQ_SEND;
		1549	}
		1550
		1551	void
		1552	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1553	ALIAS:
		1554	aio_stat = EIO_STAT
		1555	aio_lstat = EIO_LSTAT
		1556	aio_statvfs = EIO_STATVFS
		1557	PPCODE:
		1558	{
		1559	dREQ;
		1560
		1561	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1562
		1563	REQ_SEND;
		1564	}
		1565
		1566	UV
		1567	major (UV dev)
		1568	ALIAS:
		1569	minor = 1
823	CODE:	1570	CODE:
		1571	RETVAL = ix ? minor (dev) : major (dev);
		1572	OUTPUT:
		1573	RETVAL
		1574
		1575	UV
		1576	makedev (UV maj, UV min)
		1577	CODE:
		1578	RETVAL = makedev (maj, min);
		1579	OUTPUT:
		1580	RETVAL
		1581
		1582	void
		1583	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1584	PPCODE:
		1585	{
		1586	dREQ;
		1587
		1588	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1589	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1590	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1591
		1592	REQ_SEND;
		1593	}
		1594
		1595	void
		1596	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1597	PPCODE:
		1598	{
		1599	dREQ;
		1600
		1601	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1602	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1603
		1604	REQ_SEND;
		1605	}
		1606
		1607	void
		1608	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1609	PPCODE:
		1610	{
		1611	dREQ;
		1612
		1613	req->int2 = mode;
		1614	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1615
		1616	REQ_SEND;
		1617	}
		1618
		1619	void
		1620	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1621	PPCODE:
		1622	{
		1623	dREQ;
		1624
		1625	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1626	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1627	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1628
		1629	REQ_SEND;
		1630	}
		1631
		1632	void
		1633	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1634	PPCODE:
		1635	{
		1636	dREQ;
		1637
		1638	req->type = EIO_READDIR;
		1639	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1640
		1641	if (flags & EIO_READDIR_DENTS)
		1642	req->int1 |= EIO_READDIR_CUSTOM2;
		1643
		1644	req_set_path1 (req, pathname);
		1645
		1646	REQ_SEND;
		1647	}
		1648
		1649	void
		1650	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1651	PPCODE:
		1652	{
		1653	dREQ;
		1654
		1655	req->type = EIO_MKDIR;
		1656	req->int2 = mode;
		1657	req_set_path1 (req, pathname);
		1658
		1659	REQ_SEND;
		1660	}
		1661
		1662	void
		1663	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1664	ALIAS:
		1665	aio_unlink = EIO_UNLINK
		1666	aio_rmdir = EIO_RMDIR
		1667	aio_readdir = EIO_READDIR
		1668	PPCODE:
824	{	1669	{
825	dREQ;	1670	dREQ;
826		1671
827	req->type = ix;	1672	req->type = ix;
828	req->data = newSVsv (pathname);	1673	req_set_path1 (req, pathname);
829	req->dataptr = SvPVbyte_nolen (req->data);
830
831	send_req (req);
832	}
833		1674
		1675	REQ_SEND;
		1676	}
		1677
834	void	1678	void
835	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1679	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
836	SV * oldpath	1680	ALIAS:
837	SV * newpath	1681	aio_link = EIO_LINK
838	SV * callback	1682	aio_symlink = EIO_SYMLINK
		1683	aio_rename = EIO_RENAME
839	CODE:	1684	PPCODE:
840	{	1685	{
		1686	eio_wd wd2 = 0;
841	dREQ;	1687	dREQ;
842		1688
843	req->type = REQ_SYMLINK;	1689	req->type = ix;
844	req->fh = newSVsv (oldpath);	1690	req_set_path1 (req, oldpath);
845	req->data2ptr = SvPVbyte_nolen (req->fh);	1691	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
846	req->data = newSVsv (newpath);	1692	req->int3 = (long)wd2;
847	req->dataptr = SvPVbyte_nolen (req->data);
848		1693
849	send_req (req);	1694	REQ_SEND;
850	}	1695	}
851		1696
852	void	1697	void
853	flush()	1698	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
854	PROTOTYPE:	1699	PPCODE:
		1700	{
		1701	eio_wd wd2 = 0;
		1702	dREQ;
		1703
		1704	req->type = EIO_RENAME;
		1705	req_set_path1 (req, oldpath);
		1706	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1707	req->int2 = flags;
		1708	req->int3 = (long)wd2;
		1709
		1710	REQ_SEND;
		1711	}
		1712
		1713	void
		1714	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
		1715	PPCODE:
		1716	{
		1717	dREQ;
		1718
		1719	req->type = EIO_MKNOD;
		1720	req->int2 = (mode_t)mode;
		1721	req->offs = dev;
		1722	req_set_path1 (req, pathname);
		1723
		1724	REQ_SEND;
		1725	}
		1726
		1727	void
		1728	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1729	ALIAS:
		1730	aio_mtouch = EIO_MTOUCH
		1731	aio_msync = EIO_MSYNC
		1732	PPCODE:
		1733	{
		1734	STRLEN svlen;
		1735	char *svptr = SvPVbyte (data, svlen);
		1736	UV len = SvUV (length);
		1737
		1738	if (flags < 0)
		1739	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1740
		1741	if (offset < 0)
		1742	offset += svlen;
		1743
		1744	if (offset < 0 || offset > svlen)
		1745	croak ("offset outside of scalar");
		1746
		1747	if (!SvOK (length) || len + offset > svlen)
		1748	len = svlen - offset;
		1749
		1750	{
		1751	dREQ;
		1752
		1753	req->type = ix;
		1754	req->sv2 = SvREFCNT_inc (data);
		1755	req->ptr2 = (char *)svptr + offset;
		1756	req->size = len;
		1757	req->int1 = flags;
		1758
		1759	REQ_SEND;
		1760	}
		1761	}
		1762
		1763	void
		1764	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1765	PPCODE:
		1766	{
		1767	STRLEN svlen;
		1768	char *svptr = SvPVbyte (data, svlen);
		1769	UV len = SvUV (length);
		1770
		1771	if (offset < 0)
		1772	offset += svlen;
		1773
		1774	if (offset < 0 || offset > svlen)
		1775	croak ("offset outside of scalar");
		1776
		1777	if (!SvOK (length) || len + offset > svlen)
		1778	len = svlen - offset;
		1779
		1780	{
		1781	dREQ;
		1782
		1783	req->type = EIO_MLOCK;
		1784	req->sv2 = SvREFCNT_inc (data);
		1785	req->ptr2 = (char *)svptr + offset;
		1786	req->size = len;
		1787
		1788	REQ_SEND;
		1789	}
		1790	}
		1791
		1792	void
		1793	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1794	PPCODE:
		1795	{
		1796	dREQ;
		1797
		1798	req->type = EIO_MLOCKALL;
		1799	req->int1 = flags;
		1800
		1801	REQ_SEND;
		1802	}
		1803
		1804	void
		1805	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1806	PPCODE:
		1807	{
		1808	int fd = s_fileno_croak (fh, 0);
		1809	dREQ;
		1810
		1811	req->type = EIO_CUSTOM;
		1812	req->sv1 = newSVsv (fh);
		1813	req->int1 = fd;
		1814
		1815	req->feed = fiemap;
		1816	#if HAVE_FIEMAP
		1817	/* keep our fingers crossed that the next two types are 64 bit */
		1818	req->offs = start;
		1819	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1820	req->int2 = flags;
		1821	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1822	#endif
		1823
		1824	REQ_SEND;
		1825	}
		1826
		1827	void
		1828	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
		1829	PPCODE:
		1830	{
		1831	char *svptr = 0;
		1832
		1833	sv_clear_foreign (data);
		1834
		1835	if (length) /* known length, directly read into scalar */
		1836	{
		1837	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1838	svptr = sv_grow (data, length + 1);
		1839	else if (SvCUR (data) < length)
		1840	croak ("length outside of scalar, and cannot grow");
		1841	else
		1842	svptr = SvPVbyte_nolen (data);
		1843	}
		1844
		1845	{
		1846	dREQ;
		1847
		1848	req->type = EIO_SLURP;
		1849	req_set_path1 (req, pathname);
		1850	req->offs = offset;
		1851	req->size = length;
		1852	req->sv2 = SvREFCNT_inc (data);
		1853	req->ptr2 = svptr;
		1854
		1855	if (!SvREADONLY (data))
		1856	{
		1857	SvREADONLY_on (data);
		1858	req->flags |= FLAG_SV2_RO_OFF;
		1859	}
		1860
		1861	REQ_SEND;
		1862	}
		1863	}
		1864
		1865	void
		1866	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1867	PPCODE:
		1868	{
		1869	dREQ;
		1870
		1871	req->type = EIO_BUSY;
		1872	req->nv1 = delay < 0. ? 0. : delay;
		1873
		1874	REQ_SEND;
		1875	}
		1876
		1877	void
		1878	aio_group (SV *callback = &PL_sv_undef)
		1879	PPCODE:
		1880	{
		1881	dREQ;
		1882
		1883	req->type = EIO_GROUP;
		1884
		1885	PUTBACK;
		1886	req_submit (req);
		1887	SPAGAIN;
		1888
		1889	XPUSHs (req_sv (req, aio_grp_stash));
		1890	}
		1891
		1892	void
		1893	aio_nop (SV *callback = &PL_sv_undef)
		1894	ALIAS:
		1895	aio_nop = EIO_NOP
		1896	aio_sync = EIO_SYNC
		1897	PPCODE:
		1898	{
		1899	dREQ;
		1900
		1901	req->type = ix;
		1902
		1903	REQ_SEND;
		1904	}
		1905
		1906	int
		1907	aioreq_pri (int pri = NO_INIT)
855	CODE:	1908	CODE:
		1909	RETVAL = next_pri;
		1910	if (items > 0)
		1911	{
		1912	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1913	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1914	next_pri = pri;
		1915	}
		1916	OUTPUT:
		1917	RETVAL
		1918
		1919	void
		1920	aioreq_nice (int nice = 0)
		1921	CODE:
		1922	nice = next_pri - nice;
		1923	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1924	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1925	next_pri = nice;
		1926
		1927	void
		1928	flush ()
		1929	CODE:
856	while (nreqs)	1930	while (eio_nreqs ())
857	{	1931	{
858	poll_wait ();	1932	poll_wait ();
859	poll_cb ();	1933	poll_cb ();
860	}	1934	}
861		1935
862	void	1936	int
863	poll()	1937	poll ()
864	PROTOTYPE:
865	CODE:	1938	CODE:
866	if (nreqs)
867	{
868	poll_wait ();	1939	poll_wait ();
869	poll_cb ();	1940	RETVAL = poll_cb ();
870	}
871
872	int
873	poll_fileno()
874	PROTOTYPE:
875	CODE:
876	RETVAL = respipe [0];
877	OUTPUT:	1941	OUTPUT:
878	RETVAL	1942	RETVAL
879		1943
880	int	1944	int
		1945	poll_fileno ()
		1946	CODE:
		1947	RETVAL = s_epipe_fd (&respipe);
		1948	OUTPUT:
		1949	RETVAL
		1950
		1951	int
881	poll_cb(...)	1952	poll_cb (...)
882	PROTOTYPE:	1953	PROTOTYPE:
883	CODE:	1954	CODE:
884	RETVAL = poll_cb ();	1955	RETVAL = poll_cb ();
885	OUTPUT:	1956	OUTPUT:
886	RETVAL	1957	RETVAL
887		1958
888	void	1959	void
889	poll_wait()	1960	poll_wait ()
890	PROTOTYPE:
891	CODE:	1961	CODE:
892	if (nreqs)
893	poll_wait ();	1962	poll_wait ();
894		1963
895	int	1964	int
896	nreqs()	1965	nreqs ()
897	PROTOTYPE:
898	CODE:	1966	CODE:
899	RETVAL = nreqs;	1967	RETVAL = eio_nreqs ();
900	OUTPUT:	1968	OUTPUT:
901	RETVAL	1969	RETVAL
902		1970
		1971	int
		1972	nready ()
		1973	CODE:
		1974	RETVAL = eio_nready ();
		1975	OUTPUT:
		1976	RETVAL
		1977
		1978	int
		1979	npending ()
		1980	CODE:
		1981	RETVAL = eio_npending ();
		1982	OUTPUT:
		1983	RETVAL
		1984
		1985	int
		1986	nthreads ()
		1987	CODE:
		1988	RETVAL = eio_nthreads ();
		1989	OUTPUT:
		1990	RETVAL
		1991
		1992	int
		1993	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1994	CODE:
		1995	RETVAL = posix_fadvise (fh, offset, length, advice);
		1996	OUTPUT:
		1997	RETVAL
		1998
		1999	IV
		2000	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		2001	CODE:
		2002	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		2003	OUTPUT:
		2004	RETVAL
		2005
		2006	void
		2007	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		2008	PPCODE:
		2009	sv_clear_foreign (scalar);
		2010	{
		2011	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		2012	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		2013	if (addr == (void *)-1)
		2014	XSRETURN_NO;
		2015
		2016	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2017
		2018	if (!(prot & PROT_WRITE))
		2019	SvREADONLY_on (scalar);
		2020
		2021	XSRETURN_YES;
		2022	}
		2023
		2024	void
		2025	munmap (SV *scalar)
		2026	CODE:
		2027	sv_clear_foreign (scalar);
		2028
		2029	int
		2030	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2031	ALIAS:
		2032	mprotect = 1
		2033	CODE:
		2034	{
		2035	STRLEN svlen;
		2036	void *addr = SvPVbyte (scalar, svlen);
		2037	STRLEN len = SvUV (length);
		2038
		2039	if (offset < 0)
		2040	offset += svlen;
		2041
		2042	if (offset < 0 || offset > svlen)
		2043	croak ("offset outside of scalar");
		2044
		2045	if (!SvOK (length) || len + offset > svlen)
		2046	len = svlen - offset;
		2047
		2048	addr = (void *)(((intptr_t)addr) + offset);
		2049	eio_page_align (&addr, &len);
		2050
		2051	switch (ix)
		2052	{
		2053	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2054	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2055	}
		2056	}
		2057	OUTPUT:
		2058	RETVAL
		2059
		2060	int
		2061	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		2062	CODE:
		2063	{
		2064	STRLEN svlen;
		2065	void *addr = SvPVbyte (scalar, svlen);
		2066	size_t len = SvUV (length);
		2067
		2068	if (offset < 0)
		2069	offset += svlen;
		2070
		2071	if (offset < 0 || offset > svlen)
		2072	croak ("offset outside of scalar");
		2073
		2074	if (!SvOK (length) || len + offset > svlen)
		2075	len = svlen - offset;
		2076
		2077	addr = (void *)(((intptr_t)addr) + offset);
		2078	eio_page_align (&addr, &len);
		2079	#if _POSIX_MEMLOCK_RANGE
		2080	RETVAL = munlock (addr, len);
		2081	#else
		2082	RETVAL = EIO_ENOSYS ();
		2083	#endif
		2084	}
		2085	OUTPUT:
		2086	RETVAL
		2087
		2088	int
		2089	munlockall ()
		2090	CODE:
		2091	#if _POSIX_MEMLOCK
		2092	munlockall ();
		2093	#else
		2094	RETVAL = EIO_ENOSYS ();
		2095	#endif
		2096	OUTPUT:
		2097	RETVAL
		2098
		2099	int
		2100	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2101	CODE:
		2102	{
		2103	#if HAVE_LINUX_SPLICE
		2104	loff_t off_in_, off_out_;
		2105	RETVAL = splice (
		2106	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2107	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2108	length, flags
		2109	);
		2110	#else
		2111	RETVAL = EIO_ENOSYS ();
		2112	#endif
		2113	}
		2114	OUTPUT:
		2115	RETVAL
		2116
		2117	int
		2118	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2119	CODE:
		2120	#if HAVE_LINUX_SPLICE
		2121	RETVAL = tee (rfh, wfh, length, flags);
		2122	#else
		2123	RETVAL = EIO_ENOSYS ();
		2124	#endif
		2125	OUTPUT:
		2126	RETVAL
		2127
		2128	int
		2129	pipesize (aio_rfd rfh, int new_size = -1)
		2130	PROTOTYPE: $;$
		2131	CODE:
		2132	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2133	if (new_size >= 0)
		2134	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2135	else
		2136	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2137	#else
		2138	errno = ENOSYS;
		2139	RETVAL = -1;
		2140	#endif
		2141	OUTPUT:
		2142	RETVAL
		2143
		2144	void
		2145	pipe2 (int flags = 0)
		2146	PROTOTYPE: ;$
		2147	PPCODE:
		2148	{
		2149	int fd[2];
		2150	int res;
		2151
		2152	if (flags)
		2153	#if HAVE_PIPE2
		2154	res = pipe2 (fd, flags);
		2155	#else
		2156	res = (errno = ENOSYS, -1);
		2157	#endif
		2158	else
		2159	res = pipe (fd);
		2160
		2161	if (!res)
		2162	{
		2163	EXTEND (SP, 2);
		2164	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2165	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2166	}
		2167	}
		2168
		2169	void
		2170	eventfd (unsigned int initval = 0, int flags = 0)
		2171	PPCODE:
		2172	{
		2173	int fd;
		2174	#if HAVE_EVENTFD
		2175	fd = eventfd (initval, flags);
		2176	#else
		2177	fd = (errno = ENOSYS, -1);
		2178	#endif
		2179
		2180	XPUSHs (newmortalFH (fd, O_RDWR));
		2181	}
		2182
		2183	UV
		2184	get_fdlimit ()
		2185	CODE:
		2186	#if HAVE_RLIMITS
		2187	struct rlimit rl;
		2188	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2189	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2190	#endif
		2191	XSRETURN_UNDEF;
		2192	OUTPUT:
		2193	RETVAL
		2194
		2195	void
		2196	min_fdlimit (UV limit = 0x7fffffffU)
		2197	CODE:
		2198	{
		2199	#if HAVE_RLIMITS
		2200	struct rlimit rl;
		2201	rlim_t orig_rlim_max;
		2202	UV bit;
		2203
		2204	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2205	goto fail;
		2206
		2207	if (rl.rlim_cur == RLIM_INFINITY)
		2208	XSRETURN_YES;
		2209
		2210	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2211
		2212	if (rl.rlim_cur < limit)
		2213	{
		2214	rl.rlim_cur = limit;
		2215
		2216	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2217	rl.rlim_max = rl.rlim_cur;
		2218	}
		2219
		2220	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2221	XSRETURN_YES;
		2222
		2223	if (errno == EPERM)
		2224	{
		2225	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2226	/* our limit overflows a system-wide limit */
		2227	/* try an adaptive algorithm, but do not lower the hardlimit */
		2228	rl.rlim_max = 0;
		2229	for (bit = 0x40000000U; bit; bit >>= 1)
		2230	{
		2231	rl.rlim_max |= bit;
		2232	rl.rlim_cur = rl.rlim_max;
		2233
		2234	/* nevr decrease the hard limit */
		2235	if (rl.rlim_max < orig_rlim_max)
		2236	break;
		2237
		2238	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2239	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2240	}
		2241
		2242	/* now, raise the soft limit to the max permitted */
		2243	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2244	{
		2245	rl.rlim_cur = rl.rlim_max;
		2246	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2247	errno = EPERM;
		2248	}
		2249	}
		2250	#endif
		2251	fail:
		2252	XSRETURN_UNDEF;
		2253	}
		2254
		2255	void _on_next_submit (SV *cb)
		2256	CODE:
		2257	SvREFCNT_dec (on_next_submit);
		2258	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2259
		2260	PROTOTYPES: DISABLE
		2261
		2262	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2263
		2264	BOOT:
		2265	{
		2266	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2267	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2268	}
		2269
		2270	void
		2271	DESTROY (SV *self)
		2272	CODE:
		2273	{
		2274	aio_wd wd = SvAIO_WD (self);
		2275	#if HAVE_AT
		2276	{
		2277	SV *callback = &PL_sv_undef;
		2278	dREQ; /* clobbers next_pri :/ */
		2279	next_pri = req->pri; /* restore next_pri */
		2280	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2281	req->type = EIO_WD_CLOSE;
		2282	req->wd = wd;
		2283	REQ_SEND;
		2284	}
		2285	#else
		2286	eio_wd_close_sync (wd);
		2287	#endif
		2288	}
		2289
		2290	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2291
		2292	void
		2293	cancel (aio_req_ornot req)
		2294	CODE:
		2295	eio_cancel (req);
		2296
		2297	void
		2298	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2299	PPCODE:
		2300	{
		2301	if (GIMME_V != G_VOID)
		2302	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2303
		2304	if (items > 1)
		2305	{
		2306	SV *cb_cv = get_cb (callback);
		2307
		2308	SvREFCNT_dec (req->callback);
		2309	req->callback = SvREFCNT_inc (cb_cv);
		2310	}
		2311	}
		2312
		2313	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2314
		2315	void
		2316	add (aio_req grp, ...)
		2317	PPCODE:
		2318	{
		2319	int i;
		2320
		2321	if (grp->int1 == 2)
		2322	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2323
		2324	for (i = 1; i < items; ++i )
		2325	{
		2326	aio_req req;
		2327
		2328	if (GIMME_V != G_VOID)
		2329	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2330
		2331	req = SvAIO_REQ (ST (i));
		2332
		2333	if (req)
		2334	eio_grp_add (grp, req);
		2335	}
		2336	}
		2337
		2338	void
		2339	cancel_subs (aio_req_ornot req)
		2340	CODE:
		2341	req_cancel_subs (req);
		2342
		2343	void
		2344	result (aio_req grp, ...)
		2345	CODE:
		2346	{
		2347	int i;
		2348	AV *av;
		2349
		2350	grp->errorno = errno;
		2351
		2352	av = newAV ();
		2353	av_extend (av, items - 1);
		2354
		2355	for (i = 1; i < items; ++i )
		2356	av_push (av, newSVsv (ST (i)));
		2357
		2358	SvREFCNT_dec (grp->sv1);
		2359	grp->sv1 = (SV *)av;
		2360	}
		2361
		2362	void
		2363	errno (aio_req grp, int errorno = errno)
		2364	CODE:
		2365	grp->errorno = errorno;
		2366
		2367	void
		2368	limit (aio_req grp, int limit)
		2369	CODE:
		2370	eio_grp_limit (grp, limit);
		2371
		2372	void
		2373	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2374	CODE:
		2375	{
		2376	SvREFCNT_dec (grp->sv2);
		2377	grp->sv2 = newSVsv (callback);
		2378	grp->feed = aio_grp_feed;
		2379
		2380	if (grp->int2 <= 0)
		2381	grp->int2 = 2;
		2382
		2383	eio_grp_limit (grp, grp->int2);
		2384	}
		2385

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