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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.19 by root, Sun Jul 31 19:04:45 2005 UTC vs.
Revision 1.252 by root, Sat Jan 6 02:11:10 2018 UTC

1	#ifndef _REENTRANT	1	#include "libeio/xthread.h"
2	# define _REENTRANT 1	2
3	#endif
4	#include <errno.h>	3	#include <errno.h>
5		4
6	#include "EXTERN.h"	5	#include "EXTERN.h"
7	#include "perl.h"	6	#include "perl.h"
8	#include "XSUB.h"	7	#include "XSUB.h"
9		8
10	#include "autoconf/config.h"	9	#include "schmorp.h"
11		10
		11	#include <stddef.h>
		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	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
21		23
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* the incompetent fool that created musl keeps __linux__, refuses
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	* to implement any linux standard apis, and also has no way to test
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	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
25		37
26	#if __ia64	38	/* perl namespace pollution */
27	# 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
28	#else	84	#else
29	# 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_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
		151	# else
		152	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
30	#endif	153	# endif
		154	#endif
		155
		156	/* defines all sorts of constants to 0 unless they are already defined */
		157	/* also provides const_iv_ and const_niv_ macros for them */
		158	#include "def0.h"
		159
		160	#ifndef makedev
		161	# define makedev(maj,min) (((maj) << 8) | (min))
		162	#endif
		163	#ifndef major
		164	# define major(dev) ((dev) >> 8)
		165	#endif
		166	#ifndef minor
		167	# define minor(dev) ((dev) & 0xff)
		168	#endif
		169
		170	#if PAGESIZE <= 0
		171	# define PAGESIZE sysconf (_SC_PAGESIZE)
		172	#endif
		173
		174	/*****************************************************************************/
		175
		176	#if !_POSIX_MAPPED_FILES
		177	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		178	# define munmap(addr,length) EIO_ENOSYS ()
		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
		210	};
		211
		212	static int ecb_cold
		213	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
		214	{
		215	free (mg->mg_ptr);
		216	mg->mg_obj = 0; /* just in case */
		217
		218	SvREADONLY_off (sv);
		219
		220	if (SvPVX (sv) != mg->mg_ptr)
		221	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
		222
		223	SvCUR_set (sv, 0);
		224	SvPVX (sv) = 0;
		225	SvOK_off (sv);
		226
		227	return 0;
		228	}
		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 */
		237	static void
		238	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
		239	{
		240	sv_force_normal (sv);
		241
		242	/* we store the length in mg_obj, as namlen is I32 :/ */
		243	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
		244	->mg_obj = (SV *)length;
		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
		257	static void
		258	sv_clear_foreign (SV *sv)
		259	{
		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)
		283	count = 8;
		284
		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);
		313
		314	for (;;)
		315	{
		316	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
		317	char scratch[3072];
		318	struct fiemap *incmap = (struct fiemap *)scratch;
		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;
		335	if (!fiemap)
		336	return;
		337
		338	req->ptr1 = fiemap;
		339
		340	for (count = 0; count < incmap->fm_mapped_extents; ++count)
		341	{
		342	struct fiemap_extent *e = incmap->fm_extents + count;
		343
		344	if (e->fe_logical + e->fe_length >= end_offset)
		345	goto done;
		346
		347	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		348
		349	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		350	goto done;
		351
		352	}
		353	}
		354
		355	done:
		356	req->result = 0;
		357
		358	#else
		359	errno = ENOSYS;
		360	#endif
		361	}
		362
		363	/*****************************************************************************/
31		364
32	enum {	365	enum {
33	REQ_QUIT,	366	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
34	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
37	REQ_FSYNC, REQ_FDATASYNC,
38	};	367	};
39		368
40	typedef struct aio_cb {
41	struct aio_cb *volatile next;
42
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	369	typedef eio_req *aio_req;
		370	typedef eio_req *aio_req_ornot;
		371	typedef eio_wd aio_wd;
59		372
60	static int started;	373	static SV *on_next_submit;
61	static volatile int nreqs;	374	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	375	static int max_outstanding;
63	static int respipe [2];
64		376
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	377	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		378
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	379	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */	380	static void req_cancel (aio_req req);
71		381
72	static void	382	static void
73	poll_wait ()	383	want_poll (void)
74	{	384	{
75	if (nreqs && !ress)	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)
76	{	401	{
77	fd_set rfd;	402	req->self = (SV *)newHV ();
78	FD_ZERO(&rfd);	403	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	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	}
83	}	503	}
84		504
85	static int	505	static int
86	poll_cb ()	506	req_invoke (eio_req *req)
87	{	507	{
88	dSP;	508	if (req->flags & FLAG_SV2_RO_OFF)
89	int count = 0;	509	SvREADONLY_off (req->sv2);
90	aio_req req, prv;
91		510
92	pthread_mutex_lock (&reslock);	511	if (!EIO_CANCELLED (req) && req->callback)
93
94	{
95	/* read any signals sent by the worker threads */
96	char buf [32];
97	while (read (respipe [0], buf, 32) > 0)
98	;
99	}
100
101	req = ress;
102	ress = rese = 0;
103
104	pthread_mutex_unlock (&reslock);
105
106	while (req)
107	{	512	{
108	nreqs--;	513	dSP;
		514	static SV *sv_result_cache; /* caches the result integer SV */
		515	SV *sv_result;
109		516
110	if (req->type == REQ_QUIT)	517	ENTER;
111	started--;	518	SAVETMPS;
112	else	519	PUSHMARK (SP);
		520	EXTEND (SP, 1);
		521
		522	/* do not recreate the result IV from scratch each time */
		523	if (expect_true (sv_result_cache))
113	{	524	{
114	int errorno = errno;	525	sv_result = sv_result_cache; sv_result_cache = 0;
115	errno = req->errorno;	526	SvIV_set (sv_result, req->result);
116		527	SvIOK_only (sv_result);
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132
133	Safefree (req->statdata);
134	}
135
136	ENTER;
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{
142	/* convert fd to fh */
143	SV *fh;
144
145	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147	SPAGAIN;
148
149	fh = SvREFCNT_inc (POPs);
150
151	PUSHMARK (SP);
152	XPUSHs (sv_2mortal (fh));
153	}
154
155	if (SvOK (req->callback))
156	{
157	PUTBACK;
158	call_sv (req->callback, G_VOID | G_EVAL);
159	SPAGAIN;
160	}
161
162	LEAVE;
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	prv = req;
172	req = req->next;
173	Safefree (prv);
174
175	/* TODO: croak on errors? */
176	}
177
178	return count;
179	}
180
181	static void *aio_proc(void *arg);
182
183	static void
184	start_thread (void)
185	{
186	sigset_t fullsigset, oldsigset;
187	pthread_t tid;
188	pthread_attr_t attr;
189
190	pthread_attr_init (&attr);
191	pthread_attr_setstacksize (&attr, STACKSIZE);
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193
194	sigfillset (&fullsigset);
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
196
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{
214	reqe->next = req;
215	reqe = req;
216	}
217	else
218	reqe = reqs = req;
219
220	pthread_cond_signal (&reqwait);
221	pthread_mutex_unlock (&reqlock);
222
223	while (nreqs > max_outstanding)
224	{
225	poll_wait ();
226	poll_cb ();
227	}
228	}
229
230	static void
231	end_thread (void)
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}
239
240	/* work around various missing functions */
241
242	#if !HAVE_PREADWRITE
243	# define pread aio_pread
244	# define pwrite aio_pwrite
245
246	/*
247	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.
250	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
252
253	static ssize_t
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{
256	ssize_t res;
257	off_t ooffset;
258
259	pthread_mutex_lock (&iolock);
260	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);
265
266	return res;
267	}
268
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)
271	{
272	ssize_t res;
273	off_t ooffset;
274
275	pthread_mutex_lock (&iolock);
276	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);
281
282	return res;
283	}
284	#endif
285
286	#if !HAVE_FDATASYNC
287	# define fdatasync fsync
288	#endif
289
290	#if !HAVE_READAHEAD
291	# define readahead aio_readahead
292
293	static char readahead_buf[4096];
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{
298	while (count > 0)
299	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
301
302	pread (fd, readahead_buf, len, offset);
303	offset += len;
304	count -= len;
305	}
306
307	errno = 0;
308	}
309	#endif
310
311	static void *
312	aio_proc (void *thr_arg)
313	{
314	aio_req req;
315	int type;
316
317	do
318	{
319	pthread_mutex_lock (&reqlock);
320
321	for (;;)
322	{
323	req = reqs;
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330
331	if (req)
332	break;
333
334	pthread_cond_wait (&reqwait, &reqlock);
335	}
336
337	pthread_mutex_unlock (&reqlock);
338
339	errno = 0; /* strictly unnecessary */
340
341	type = req->type;
342
343	switch (type)
344	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
347
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
349
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:
362	break;
363
364	default:
365	req->result = ENOSYS;
366	break;
367	}
368
369	req->errorno = errno;
370
371	pthread_mutex_lock (&reslock);
372
373	req->next = 0;
374
375	if (rese)
376	{
377	rese->next = req;
378	rese = req;
379	}	528	}
380	else	529	else
381	{	530	{
382	rese = ress = req;	531	sv_result = newSViv (req->result);
383		532	SvREADONLY_on (sv_result);
384	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);
386	}	533	}
387		534
388	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	{
		705	SvCUR_set (req->sv2, req->result);
		706	*SvEND (req->sv2) = 0;
		707	SvPOK_only (req->sv2);
		708	}
		709
		710	SvSETMAGIC (req->sv2);
		711	}
		712
		713	PUSHs (sv_result);
		714	}
		715	break;
		716
		717	case EIO_CUSTOM:
		718	if (req->feed == fiemap)
		719	{
		720	#if HAVE_FIEMAP
		721	if (!req->result)
		722	{
		723	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		724
		725	if (fiemap->fm_extent_count)
		726	{
		727	AV *av = newAV ();
		728	int i;
		729
		730	while (fiemap->fm_mapped_extents)
		731	{
		732	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		733	AV *ext_av = newAV ();
		734
		735	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		736	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		737	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		738	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		739
		740	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		741	}
		742
		743	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		744	}
		745	else
		746	{
		747	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		748	PUSHs (sv_result);
		749	}
		750	}
		751	#endif
		752	}
		753	else
		754	PUSHs (sv_result);
		755	break;
		756
		757	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		758	if (req->result > 0)
		759	SvIV_set (sv_result, 0);
		760	/* FALLTHROUGH */
		761
		762	default:
		763	PUSHs (sv_result);
		764	break;
		765	}
		766
		767	errno = req->errorno;
		768
		769	PUTBACK;
		770	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		771	SPAGAIN;
		772
		773	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		774	SvREFCNT_dec (sv_result);
		775	else
		776	sv_result_cache = sv_result;
		777
		778	FREETMPS;
		779	LEAVE;
		780
		781	PUTBACK;
389	}	782	}
390	while (type != REQ_QUIT);
391		783
		784	return !!SvTRUE (ERRSV);
		785	}
		786
		787	static void
		788	req_destroy (aio_req req)
		789	{
		790	if (req->self)
		791	{
		792	sv_unmagic (req->self, PERL_MAGIC_ext);
		793	SvREFCNT_dec (req->self);
		794	}
		795
		796	SvREFCNT_dec (req->sv1);
		797	SvREFCNT_dec (req->sv2);
		798	SvREFCNT_dec (req->sv3);
		799	SvREFCNT_dec (req->sv4);
		800	SvREFCNT_dec (req->callback);
		801
		802	free (req);
		803	}
		804
		805	static void
		806	req_cancel_subs (aio_req grp)
		807	{
		808	if (grp->type != EIO_GROUP)
		809	return;
		810
		811	SvREFCNT_dec (grp->sv2);
		812	grp->sv2 = 0;
		813
		814	eio_grp_cancel (grp);
		815	}
		816
		817	static void ecb_cold
		818	create_respipe (void)
		819	{
		820	if (s_epipe_renew (&respipe))
		821	croak ("IO::AIO: unable to initialize result pipe");
		822	}
		823
		824	static void
		825	poll_wait (void)
		826	{
		827	while (eio_nreqs ())
		828	{
		829	int size;
		830
		831	X_LOCK (EIO_POOL->reslock);
		832	size = EIO_POOL->res_queue.size;
		833	X_UNLOCK (EIO_POOL->reslock);
		834
		835	if (size)
		836	return;
		837
		838	etp_maybe_start_thread (EIO_POOL);
		839
		840	s_epipe_wait (&respipe);
		841	}
		842	}
		843
		844	static int
		845	poll_cb (void)
		846	{
		847	for (;;)
		848	{
		849	int res = eio_poll ();
		850
		851	if (res > 0)
		852	croak (0);
		853
		854	if (!max_outstanding || max_outstanding > eio_nreqs ())
		855	return res;
		856
		857	poll_wait ();
		858	}
		859	}
		860
		861	static void ecb_cold
		862	reinit (void)
		863	{
		864	create_respipe ();
		865
		866	if (eio_init (want_poll, done_poll) < 0)
		867	croak ("IO::AIO: unable to initialise eio library");
		868	}
		869
		870	/*****************************************************************************/
		871
		872	static SV *
		873	get_cb (SV *cb_sv)
		874	{
		875	SvGETMAGIC (cb_sv);
		876	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		877	}
		878
		879	static aio_req ecb_noinline
		880	dreq (SV *callback)
		881	{
		882	SV *cb_cv;
		883	aio_req req;
		884	int req_pri = next_pri;
		885	next_pri = EIO_PRI_DEFAULT;
		886
		887	cb_cv = get_cb (callback);
		888
		889	req = calloc (sizeof (*req), 1);
		890	if (!req)
		891	croak ("out of memory during eio_req allocation");
		892
		893	req->callback = SvREFCNT_inc (cb_cv);
		894	req->pri = req_pri;
		895
392	return 0;	896	return req;
393	}	897	}
		898
		899	#define dREQ \
		900	aio_req req = dreq (callback); \
		901
		902	#define REQ_SEND \
		903	PUTBACK; \
		904	req_submit (req); \
		905	SPAGAIN; \
		906	\
		907	if (GIMME_V != G_VOID) \
		908	XPUSHs (req_sv (req, aio_req_stash));
		909
		910	ecb_inline void
		911	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		912	{
		913	if (expect_false (SvROK (path)))
		914	{
		915	SV *rv = SvRV (path);
		916	SV *wdob;
		917
		918	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		919	{
		920	path = AvARRAY (rv)[1];
		921	wdob = AvARRAY (rv)[0];
		922
		923	if (SvOK (wdob))
		924	{
		925	*wd = SvAIO_WD (wdob);
		926	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		927	}
		928	else
		929	*wd = EIO_INVALID_WD;
		930	}
		931	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		932	{
		933	*wd = (aio_wd)(long)SvIVX (rv);
		934	*wdsv = SvREFCNT_inc_NN (rv);
		935	*ptr = ".";
		936	return; /* path set to "." */
		937	}
		938	else
		939	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		940	}
		941
		942	*pathsv = newSVsv (path);
		943	*ptr = SvPVbyte_nolen (*pathsv);
		944	}
		945
		946	static void ecb_noinline
		947	req_set_path1 (aio_req req, SV *path)
		948	{
		949	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		950	}
		951
		952	static void ecb_noinline
		953	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		954	{
		955	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		956
		957	switch (SvTYPE (rv))
		958	{
		959	case SVt_PVIO:
		960	case SVt_PVLV:
		961	case SVt_PVGV:
		962	req->type = type_fh;
		963	req->sv1 = newSVsv (fh_or_path);
		964	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		965	break;
		966
		967	default:
		968	req->type = type_path;
		969	req_set_path1 (req, fh_or_path);
		970	break;
		971	}
		972	}
		973
		974	XS(boot_IO__AIO) ecb_cold;
394		975
395	MODULE = IO::AIO PACKAGE = IO::AIO	976	MODULE = IO::AIO PACKAGE = IO::AIO
396		977
397	PROTOTYPES: ENABLE	978	PROTOTYPES: ENABLE
398		979
399	BOOT:	980	BOOT:
400	{	981	{
401	if (pipe (respipe))	982	static const struct {
402	croak ("unable to initialize result pipe");	983	const char *name;
		984	IV iv;
		985	} *civ, const_iv[] = {
		986	# define const_niv(name, value) { # name, (IV) value },
		987	# define const_iv(name) { # name, (IV) name },
		988	# define const_eio(name) { # name, (IV) EIO_ ## name },
403		989
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	990	/* you have to re-run ./gendef0 after adding/removing any constants here */
405	croak ("cannot set result pipe to nonblocking mode");	991	/* the first block can be undef if missing */
		992	const_iv (ENOSYS)
		993	const_iv (EXDEV)
		994	const_iv (EBADR)
406		995
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	996	/* for lseek */
408	croak ("cannot set result pipe to nonblocking mode");	997	const_iv (SEEK_DATA)
409	}	998	const_iv (SEEK_HOLE)
410		999
		1000	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		1001	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		1002	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		1003	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		1004	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		1005	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		1006
		1007	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		1008	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		1009	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		1010	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1011	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		1012
		1013	/* the second block will be 0 when missing */
		1014	const_iv (O_RDONLY)
		1015	const_iv (O_WRONLY)
		1016	const_iv (O_RDWR)
		1017	const_iv (O_CREAT)
		1018	const_iv (O_TRUNC)
		1019	const_iv (O_EXCL)
		1020	const_iv (O_APPEND)
		1021
		1022	const_iv (O_ASYNC)
		1023	const_iv (O_DIRECT)
		1024	const_iv (O_NOATIME)
		1025
		1026	const_iv (O_CLOEXEC)
		1027	const_iv (O_NOCTTY)
		1028	const_iv (O_NOFOLLOW)
		1029	const_iv (O_NONBLOCK)
		1030	const_iv (O_EXEC)
		1031	const_iv (O_SEARCH)
		1032	const_iv (O_DIRECTORY)
		1033	const_iv (O_DSYNC)
		1034	const_iv (O_RSYNC)
		1035	const_iv (O_SYNC)
		1036	const_iv (O_PATH)
		1037	const_iv (O_TMPFILE)
		1038	const_iv (O_TTY_INIT)
		1039
		1040	const_iv (S_IFIFO)
		1041	const_iv (S_IFCHR)
		1042	const_iv (S_IFBLK)
		1043	const_iv (S_IFLNK)
		1044	const_iv (S_IFREG)
		1045	const_iv (S_IFDIR)
		1046	const_iv (S_IFWHT)
		1047	const_iv (S_IFSOCK)
		1048	const_iv (S_IFMT)
		1049
		1050	const_iv (ST_RDONLY)
		1051	const_iv (ST_NOSUID)
		1052	const_iv (ST_NODEV)
		1053	const_iv (ST_NOEXEC)
		1054	const_iv (ST_SYNCHRONOUS)
		1055	const_iv (ST_MANDLOCK)
		1056	const_iv (ST_WRITE)
		1057	const_iv (ST_APPEND)
		1058	const_iv (ST_IMMUTABLE)
		1059	const_iv (ST_NOATIME)
		1060	const_iv (ST_NODIRATIME)
		1061	const_iv (ST_RELATIME)
		1062
		1063	const_iv (PROT_NONE)
		1064	const_iv (PROT_EXEC)
		1065	const_iv (PROT_READ)
		1066	const_iv (PROT_WRITE)
		1067
		1068	const_iv (MAP_PRIVATE)
		1069	const_iv (MAP_SHARED)
		1070	const_iv (MAP_FIXED)
		1071	const_iv (MAP_ANONYMOUS)
		1072
		1073	/* linuxish */
		1074	const_iv (MAP_LOCKED)
		1075	const_iv (MAP_NORESERVE)
		1076	const_iv (MAP_POPULATE)
		1077	const_iv (MAP_NONBLOCK)
		1078	const_iv (MAP_GROWSDOWN)
		1079	const_iv (MAP_32BIT)
		1080	const_iv (MAP_HUGETLB)
		1081	const_iv (MAP_STACK)
		1082
		1083	const_iv (F_DUPFD_CLOEXEC)
		1084
		1085	const_iv (F_OFD_GETLK)
		1086	const_iv (F_OFD_SETLK)
		1087	const_iv (F_OFD_GETLKW)
		1088
		1089	const_iv (FIFREEZE)
		1090	const_iv (FITHAW)
		1091	const_iv (FITRIM)
		1092	const_iv (FICLONE)
		1093	const_iv (FICLONERANGE)
		1094	const_iv (FIDEDUPERANGE)
		1095
		1096	const_iv (FS_IOC_GETFLAGS)
		1097	const_iv (FS_IOC_SETFLAGS)
		1098	const_iv (FS_IOC_GETVERSION)
		1099	const_iv (FS_IOC_SETVERSION)
		1100	const_iv (FS_IOC_FIEMAP)
		1101	const_iv (FS_IOC_FSGETXATTR)
		1102	const_iv (FS_IOC_FSSETXATTR)
		1103	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1104	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1105	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1106
		1107	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1108
		1109	const_iv (FS_SECRM_FL)
		1110	const_iv (FS_UNRM_FL)
		1111	const_iv (FS_COMPR_FL)
		1112	const_iv (FS_SYNC_FL)
		1113	const_iv (FS_IMMUTABLE_FL)
		1114	const_iv (FS_APPEND_FL)
		1115	const_iv (FS_NODUMP_FL)
		1116	const_iv (FS_NOATIME_FL)
		1117	const_iv (FS_DIRTY_FL)
		1118	const_iv (FS_COMPRBLK_FL)
		1119	const_iv (FS_NOCOMP_FL)
		1120	const_iv (FS_ENCRYPT_FL)
		1121	const_iv (FS_BTREE_FL)
		1122	const_iv (FS_INDEX_FL)
		1123	const_iv (FS_JOURNAL_DATA_FL)
		1124	const_iv (FS_NOTAIL_FL)
		1125	const_iv (FS_DIRSYNC_FL)
		1126	const_iv (FS_TOPDIR_FL)
		1127	const_iv (FS_FL_USER_MODIFIABLE)
		1128
		1129	const_iv (FS_XFLAG_REALTIME)
		1130	const_iv (FS_XFLAG_PREALLOC)
		1131	const_iv (FS_XFLAG_IMMUTABLE)
		1132	const_iv (FS_XFLAG_APPEND)
		1133	const_iv (FS_XFLAG_SYNC)
		1134	const_iv (FS_XFLAG_NOATIME)
		1135	const_iv (FS_XFLAG_NODUMP)
		1136	const_iv (FS_XFLAG_RTINHERIT)
		1137	const_iv (FS_XFLAG_PROJINHERIT)
		1138	const_iv (FS_XFLAG_NOSYMLINKS)
		1139	const_iv (FS_XFLAG_EXTSIZE)
		1140	const_iv (FS_XFLAG_EXTSZINHERIT)
		1141	const_iv (FS_XFLAG_NODEFRAG)
		1142	const_iv (FS_XFLAG_FILESTREAM)
		1143	const_iv (FS_XFLAG_DAX)
		1144	const_iv (FS_XFLAG_HASATTR)
		1145
		1146	const_iv (FIEMAP_FLAG_SYNC)
		1147	const_iv (FIEMAP_FLAG_XATTR)
		1148	const_iv (FIEMAP_FLAGS_COMPAT)
		1149	const_iv (FIEMAP_EXTENT_LAST)
		1150	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1151	const_iv (FIEMAP_EXTENT_DELALLOC)
		1152	const_iv (FIEMAP_EXTENT_ENCODED)
		1153	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1154	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1155	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1156	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1157	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1158	const_iv (FIEMAP_EXTENT_MERGED)
		1159	const_iv (FIEMAP_EXTENT_SHARED)
		1160
		1161	const_iv (SPLICE_F_MOVE)
		1162	const_iv (SPLICE_F_NONBLOCK)
		1163	const_iv (SPLICE_F_MORE)
		1164	const_iv (SPLICE_F_GIFT)
		1165
		1166	/* these are libeio constants, and are independent of gendef0 */
		1167	const_eio (SEEK_SET)
		1168	const_eio (SEEK_CUR)
		1169	const_eio (SEEK_END)
		1170
		1171	const_eio (MCL_FUTURE)
		1172	const_eio (MCL_CURRENT)
		1173
		1174	const_eio (MS_ASYNC)
		1175	const_eio (MS_INVALIDATE)
		1176	const_eio (MS_SYNC)
		1177
		1178	const_eio (MT_MODIFY)
		1179
		1180	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1181	const_eio (SYNC_FILE_RANGE_WRITE)
		1182	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1183
		1184	const_eio (FALLOC_FL_KEEP_SIZE)
		1185	const_eio (FALLOC_FL_PUNCH_HOLE)
		1186	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1187	const_eio (FALLOC_FL_ZERO_RANGE)
		1188	const_eio (FALLOC_FL_INSERT_RANGE)
		1189	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1190
		1191	const_eio (RENAME_NOREPLACE)
		1192	const_eio (RENAME_EXCHANGE)
		1193	const_eio (RENAME_WHITEOUT)
		1194
		1195	const_eio (READDIR_DENTS)
		1196	const_eio (READDIR_DIRS_FIRST)
		1197	const_eio (READDIR_STAT_ORDER)
		1198	const_eio (READDIR_FOUND_UNKNOWN)
		1199
		1200	const_eio (DT_UNKNOWN)
		1201	const_eio (DT_FIFO)
		1202	const_eio (DT_CHR)
		1203	const_eio (DT_DIR)
		1204	const_eio (DT_BLK)
		1205	const_eio (DT_REG)
		1206	const_eio (DT_LNK)
		1207	const_eio (DT_SOCK)
		1208	const_eio (DT_WHT)
		1209	};
		1210
		1211	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1212	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1213	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1214	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1215
		1216	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1217	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1218
		1219	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1220
		1221	reinit ();
		1222	}
		1223
411	void	1224	void
412	min_parallel(nthreads)	1225	reinit ()
413	int nthreads	1226	PROTOTYPE:
		1227
		1228	void
		1229	max_poll_reqs (unsigned int nreqs)
414	PROTOTYPE: $	1230	PROTOTYPE: $
415	CODE:	1231	CODE:
416	while (nthreads > started)	1232	eio_set_max_poll_reqs (nreqs);
417	start_thread ();
418		1233
419	void	1234	void
420	max_parallel(nthreads)	1235	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	1236	PROTOTYPE: $
423	CODE:	1237	CODE:
		1238	eio_set_max_poll_time (nseconds);
		1239
		1240	void
		1241	min_parallel (unsigned int nthreads)
		1242	PROTOTYPE: $
		1243	CODE:
		1244	eio_set_min_parallel (nthreads);
		1245
		1246	void
		1247	max_parallel (unsigned int nthreads)
		1248	PROTOTYPE: $
		1249	CODE:
		1250	eio_set_max_parallel (nthreads);
		1251
		1252	void
		1253	max_idle (unsigned int nthreads)
		1254	PROTOTYPE: $
		1255	CODE:
		1256	eio_set_max_idle (nthreads);
		1257
		1258	void
		1259	idle_timeout (unsigned int seconds)
		1260	PROTOTYPE: $
		1261	CODE:
		1262	eio_set_idle_timeout (seconds);
		1263
		1264	void
		1265	max_outstanding (unsigned int maxreqs)
		1266	PROTOTYPE: $
		1267	CODE:
		1268	max_outstanding = maxreqs;
		1269
		1270	void
		1271	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1272	PPCODE:
424	{	1273	{
425	int cur = started;	1274	dREQ;
426	while (cur > nthreads)	1275
427	{	1276	req->type = EIO_WD_OPEN;
428	end_thread ();	1277	req_set_path1 (req, pathname);
		1278
		1279	REQ_SEND;
		1280	}
		1281
		1282	void
		1283	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1284	PPCODE:
		1285	{
		1286	dREQ;
		1287
		1288	req->type = EIO_OPEN;
		1289	req_set_path1 (req, pathname);
		1290	req->int1 = flags;
		1291	req->int2 = mode;
		1292
		1293	REQ_SEND;
		1294	}
		1295
		1296	void
		1297	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1298	ALIAS:
		1299	aio_fsync = EIO_FSYNC
		1300	aio_fdatasync = EIO_FDATASYNC
		1301	aio_syncfs = EIO_SYNCFS
		1302	PPCODE:
		1303	{
		1304	int fd = s_fileno_croak (fh, 0);
		1305	dREQ;
		1306
		1307	req->type = ix;
		1308	req->sv1 = newSVsv (fh);
		1309	req->int1 = fd;
		1310
		1311	REQ_SEND;
		1312	}
		1313
		1314	void
		1315	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1316	PPCODE:
		1317	{
		1318	int fd = s_fileno_croak (fh, 0);
		1319	dREQ;
		1320
		1321	req->type = EIO_SYNC_FILE_RANGE;
		1322	req->sv1 = newSVsv (fh);
		1323	req->int1 = fd;
		1324	req->offs = offset;
		1325	req->size = nbytes;
		1326	req->int2 = flags;
		1327
		1328	REQ_SEND;
		1329	}
		1330
		1331	void
		1332	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1333	PPCODE:
		1334	{
		1335	int fd = s_fileno_croak (fh, 0);
		1336	dREQ;
		1337
		1338	req->type = EIO_FALLOCATE;
		1339	req->sv1 = newSVsv (fh);
		1340	req->int1 = fd;
		1341	req->int2 = mode;
		1342	req->offs = offset;
		1343	req->size = len;
		1344
		1345	REQ_SEND;
		1346	}
		1347
		1348	void
		1349	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1350	PPCODE:
		1351	{
		1352	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1353	int fd = s_fileno_croak (fh, 0);
		1354	dREQ;
		1355
		1356	if (expect_false (close_fd < 0))
		1357	{
		1358	int pipefd [2];
		1359
		1360	if (
		1361	#ifdef _WIN32
		1362	_pipe (pipefd, 1, _O_BINARY) < 0
		1363	#else
		1364	pipe (pipefd) < 0
		1365	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1366	#endif
		1367	|| close (pipefd [1]) < 0
429	cur--;	1368	)
		1369	abort (); /*D*/
		1370
		1371	close_fd = pipefd [0];
430	}	1372	}
431		1373
432	while (started > nthreads)	1374	req->type = EIO_DUP2;
		1375	req->int1 = close_fd;
		1376	req->sv2 = newSVsv (fh);
		1377	req->int2 = fd;
		1378
		1379	REQ_SEND;
		1380	}
		1381
		1382	void
		1383	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1384	PPCODE:
		1385	{
		1386	int fd = s_fileno_croak (fh, 0);
		1387	dREQ;
		1388
		1389	req->type = EIO_SEEK;
		1390	req->sv1 = newSVsv (fh);
		1391	req->int1 = fd;
		1392	req->offs = SvVAL64 (offset);
		1393	req->int2 = whence;
		1394
		1395	REQ_SEND;
		1396	}
		1397
		1398	void
		1399	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
		1400	ALIAS:
		1401	aio_read = EIO_READ
		1402	aio_write = EIO_WRITE
		1403	PPCODE:
		1404	{
		1405	STRLEN svlen;
		1406	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1407	char *svptr = SvPVbyte (data, svlen);
		1408	UV len = SvUV (length);
		1409
		1410	if (dataoffset < 0)
		1411	dataoffset += svlen;
		1412
		1413	if (dataoffset < 0 || dataoffset > svlen)
		1414	croak ("dataoffset outside of data scalar");
		1415
		1416	if (ix == EIO_WRITE)
		1417	{
		1418	/* write: check length and adjust. */
		1419	if (!SvOK (length) || len + dataoffset > svlen)
		1420	len = svlen - dataoffset;
		1421	}
		1422	else
		1423	{
		1424	/* read: check type and grow scalar as necessary */
		1425	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1426	svptr = sv_grow (data, len + dataoffset + 1);
		1427	else if (SvCUR (data) < len + dataoffset)
		1428	croak ("length + dataoffset outside of scalar, and cannot grow");
		1429	}
		1430
		1431	{
		1432	dREQ;
		1433
		1434	req->type = ix;
		1435	req->sv1 = newSVsv (fh);
		1436	req->int1 = fd;
		1437	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1438	req->size = len;
		1439	req->sv2 = SvREFCNT_inc (data);
		1440	req->ptr2 = (char *)svptr + dataoffset;
		1441	req->stroffset = dataoffset;
		1442
		1443	if (!SvREADONLY (data))
		1444	{
		1445	SvREADONLY_on (data);
		1446	req->flags |= FLAG_SV2_RO_OFF;
		1447	}
		1448
		1449	REQ_SEND;
		1450	}
		1451	}
		1452
		1453	void
		1454	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
		1455	ALIAS:
		1456	aio_ioctl = EIO_IOCTL
		1457	aio_fcntl = EIO_FCNTL
		1458	PPCODE:
		1459	{
		1460	int fd = s_fileno_croak (fh, 0);
		1461	char *svptr;
		1462
		1463	if (SvPOK (arg) || !SvNIOK (arg))
		1464	{
		1465	STRLEN svlen;
		1466	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
		1467	#ifdef IOCPARM_LEN
		1468	STRLEN need = IOCPARM_LEN (request);
		1469	#else
		1470	STRLEN need = 256;
		1471	#endif
		1472
		1473	if (svlen < need)
		1474	svptr = SvGROW (arg, need);
		1475	}
		1476	else
		1477	svptr = (char *)SvIV (arg);
		1478
		1479	{
		1480	dREQ;
		1481
		1482	req->type = ix;
		1483	req->sv1 = newSVsv (fh);
		1484	req->int1 = fd;
		1485	req->int2 = (long)request;
		1486	req->sv2 = SvREFCNT_inc (arg);
		1487	req->ptr2 = svptr;
		1488
		1489	REQ_SEND;
		1490	}
		1491	}
		1492
		1493	void
		1494	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1495	ALIAS:
		1496	aio_readlink = EIO_READLINK
		1497	aio_realpath = EIO_REALPATH
		1498	PPCODE:
		1499	{
		1500	dREQ;
		1501
		1502	req->type = ix;
		1503	req_set_path1 (req, pathname);
		1504
		1505	REQ_SEND;
		1506	}
		1507
		1508	void
		1509	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1510	PPCODE:
		1511	{
		1512	int ifd = s_fileno_croak (in_fh , 0);
		1513	int ofd = s_fileno_croak (out_fh, 1);
		1514	dREQ;
		1515
		1516	req->type = EIO_SENDFILE;
		1517	req->sv1 = newSVsv (out_fh);
		1518	req->int1 = ofd;
		1519	req->sv2 = newSVsv (in_fh);
		1520	req->int2 = ifd;
		1521	req->offs = in_offset;
		1522	req->size = length;
		1523
		1524	REQ_SEND;
		1525	}
		1526
		1527	void
		1528	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1529	PPCODE:
		1530	{
		1531	int fd = s_fileno_croak (fh, 0);
		1532	dREQ;
		1533
		1534	req->type = EIO_READAHEAD;
		1535	req->sv1 = newSVsv (fh);
		1536	req->int1 = fd;
		1537	req->offs = offset;
		1538	req->size = length;
		1539
		1540	REQ_SEND;
		1541	}
		1542
		1543	void
		1544	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1545	ALIAS:
		1546	aio_stat = EIO_STAT
		1547	aio_lstat = EIO_LSTAT
		1548	aio_statvfs = EIO_STATVFS
		1549	PPCODE:
		1550	{
		1551	dREQ;
		1552
		1553	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1554
		1555	REQ_SEND;
		1556	}
		1557
		1558	UV
		1559	major (UV dev)
		1560	ALIAS:
		1561	minor = 1
		1562	CODE:
		1563	RETVAL = ix ? minor (dev) : major (dev);
		1564	OUTPUT:
		1565	RETVAL
		1566
		1567	UV
		1568	makedev (UV maj, UV min)
		1569	CODE:
		1570	RETVAL = makedev (maj, min);
		1571	OUTPUT:
		1572	RETVAL
		1573
		1574	void
		1575	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1576	PPCODE:
		1577	{
		1578	dREQ;
		1579
		1580	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1581	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1582	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1583
		1584	REQ_SEND;
		1585	}
		1586
		1587	void
		1588	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1589	PPCODE:
		1590	{
		1591	dREQ;
		1592
		1593	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1594	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1595
		1596	REQ_SEND;
		1597	}
		1598
		1599	void
		1600	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1601	PPCODE:
		1602	{
		1603	dREQ;
		1604
		1605	req->int2 = mode;
		1606	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1607
		1608	REQ_SEND;
		1609	}
		1610
		1611	void
		1612	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1613	PPCODE:
		1614	{
		1615	dREQ;
		1616
		1617	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1618	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1619	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1620
		1621	REQ_SEND;
		1622	}
		1623
		1624	void
		1625	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1626	PPCODE:
		1627	{
		1628	dREQ;
		1629
		1630	req->type = EIO_READDIR;
		1631	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1632
		1633	if (flags & EIO_READDIR_DENTS)
		1634	req->int1 |= EIO_READDIR_CUSTOM2;
		1635
		1636	req_set_path1 (req, pathname);
		1637
		1638	REQ_SEND;
		1639	}
		1640
		1641	void
		1642	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1643	PPCODE:
		1644	{
		1645	dREQ;
		1646
		1647	req->type = EIO_MKDIR;
		1648	req->int2 = mode;
		1649	req_set_path1 (req, pathname);
		1650
		1651	REQ_SEND;
		1652	}
		1653
		1654	void
		1655	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1656	ALIAS:
		1657	aio_unlink = EIO_UNLINK
		1658	aio_rmdir = EIO_RMDIR
		1659	aio_readdir = EIO_READDIR
		1660	PPCODE:
		1661	{
		1662	dREQ;
		1663
		1664	req->type = ix;
		1665	req_set_path1 (req, pathname);
		1666
		1667	REQ_SEND;
		1668	}
		1669
		1670	void
		1671	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
		1672	ALIAS:
		1673	aio_link = EIO_LINK
		1674	aio_symlink = EIO_SYMLINK
		1675	aio_rename = EIO_RENAME
		1676	PPCODE:
		1677	{
		1678	eio_wd wd2 = 0;
		1679	dREQ;
		1680
		1681	req->type = ix;
		1682	req_set_path1 (req, oldpath);
		1683	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1684	req->int3 = (long)wd2;
		1685
		1686	REQ_SEND;
		1687	}
		1688
		1689	void
		1690	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
		1691	PPCODE:
		1692	{
		1693	eio_wd wd2 = 0;
		1694	dREQ;
		1695
		1696	req->type = EIO_RENAME;
		1697	req_set_path1 (req, oldpath);
		1698	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1699	req->int2 = flags;
		1700	req->int3 = (long)wd2;
		1701
		1702	REQ_SEND;
		1703	}
		1704
		1705	void
		1706	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
		1707	PPCODE:
		1708	{
		1709	dREQ;
		1710
		1711	req->type = EIO_MKNOD;
		1712	req->int2 = (mode_t)mode;
		1713	req->offs = dev;
		1714	req_set_path1 (req, pathname);
		1715
		1716	REQ_SEND;
		1717	}
		1718
		1719	void
		1720	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1721	ALIAS:
		1722	aio_mtouch = EIO_MTOUCH
		1723	aio_msync = EIO_MSYNC
		1724	PPCODE:
		1725	{
		1726	STRLEN svlen;
		1727	char *svptr = SvPVbyte (data, svlen);
		1728	UV len = SvUV (length);
		1729
		1730	if (flags < 0)
		1731	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1732
		1733	if (offset < 0)
		1734	offset += svlen;
		1735
		1736	if (offset < 0 || offset > svlen)
		1737	croak ("offset outside of scalar");
		1738
		1739	if (!SvOK (length) || len + offset > svlen)
		1740	len = svlen - offset;
		1741
		1742	{
		1743	dREQ;
		1744
		1745	req->type = ix;
		1746	req->sv2 = SvREFCNT_inc (data);
		1747	req->ptr2 = (char *)svptr + offset;
		1748	req->size = len;
		1749	req->int1 = flags;
		1750
		1751	REQ_SEND;
		1752	}
		1753	}
		1754
		1755	void
		1756	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1757	PPCODE:
		1758	{
		1759	STRLEN svlen;
		1760	char *svptr = SvPVbyte (data, svlen);
		1761	UV len = SvUV (length);
		1762
		1763	if (offset < 0)
		1764	offset += svlen;
		1765
		1766	if (offset < 0 || offset > svlen)
		1767	croak ("offset outside of scalar");
		1768
		1769	if (!SvOK (length) || len + offset > svlen)
		1770	len = svlen - offset;
		1771
		1772	{
		1773	dREQ;
		1774
		1775	req->type = EIO_MLOCK;
		1776	req->sv2 = SvREFCNT_inc (data);
		1777	req->ptr2 = (char *)svptr + offset;
		1778	req->size = len;
		1779
		1780	REQ_SEND;
		1781	}
		1782	}
		1783
		1784	void
		1785	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1786	PPCODE:
		1787	{
		1788	dREQ;
		1789
		1790	req->type = EIO_MLOCKALL;
		1791	req->int1 = flags;
		1792
		1793	REQ_SEND;
		1794	}
		1795
		1796	void
		1797	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1798	PPCODE:
		1799	{
		1800	int fd = s_fileno_croak (fh, 0);
		1801	dREQ;
		1802
		1803	req->type = EIO_CUSTOM;
		1804	req->sv1 = newSVsv (fh);
		1805	req->int1 = fd;
		1806
		1807	req->feed = fiemap;
		1808	#if HAVE_FIEMAP
		1809	/* keep our fingers crossed that the next two types are 64 bit */
		1810	req->offs = start;
		1811	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1812	req->int2 = flags;
		1813	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1814	#endif
		1815
		1816	REQ_SEND;
		1817	}
		1818
		1819	void
		1820	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
		1821	PPCODE:
		1822	{
		1823	char *svptr = 0;
		1824
		1825	sv_clear_foreign (data);
		1826
		1827	if (length) /* known length, directly read into scalar */
		1828	{
		1829	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1830	svptr = sv_grow (data, length + 1);
		1831	else if (SvCUR (data) < length)
		1832	croak ("length outside of scalar, and cannot grow");
		1833	else
		1834	svptr = SvPVbyte_nolen (data);
		1835	}
		1836
		1837	{
		1838	dREQ;
		1839
		1840	req->type = EIO_SLURP;
		1841	req_set_path1 (req, pathname);
		1842	req->offs = offset;
		1843	req->size = length;
		1844	req->sv2 = SvREFCNT_inc (data);
		1845	req->ptr2 = svptr;
		1846
		1847	if (!SvREADONLY (data))
		1848	{
		1849	SvREADONLY_on (data);
		1850	req->flags |= FLAG_SV2_RO_OFF;
		1851	}
		1852
		1853	REQ_SEND;
		1854	}
		1855	}
		1856
		1857	void
		1858	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1859	PPCODE:
		1860	{
		1861	dREQ;
		1862
		1863	req->type = EIO_BUSY;
		1864	req->nv1 = delay < 0. ? 0. : delay;
		1865
		1866	REQ_SEND;
		1867	}
		1868
		1869	void
		1870	aio_group (SV *callback = &PL_sv_undef)
		1871	PPCODE:
		1872	{
		1873	dREQ;
		1874
		1875	req->type = EIO_GROUP;
		1876
		1877	PUTBACK;
		1878	req_submit (req);
		1879	SPAGAIN;
		1880
		1881	XPUSHs (req_sv (req, aio_grp_stash));
		1882	}
		1883
		1884	void
		1885	aio_nop (SV *callback = &PL_sv_undef)
		1886	ALIAS:
		1887	aio_nop = EIO_NOP
		1888	aio_sync = EIO_SYNC
		1889	PPCODE:
		1890	{
		1891	dREQ;
		1892
		1893	req->type = ix;
		1894
		1895	REQ_SEND;
		1896	}
		1897
		1898	int
		1899	aioreq_pri (int pri = NO_INIT)
		1900	CODE:
		1901	RETVAL = next_pri;
		1902	if (items > 0)
		1903	{
		1904	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1905	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1906	next_pri = pri;
		1907	}
		1908	OUTPUT:
		1909	RETVAL
		1910
		1911	void
		1912	aioreq_nice (int nice = 0)
		1913	CODE:
		1914	nice = next_pri - nice;
		1915	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1916	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1917	next_pri = nice;
		1918
		1919	void
		1920	flush ()
		1921	CODE:
		1922	while (eio_nreqs ())
433	{	1923	{
434	poll_wait ();	1924	poll_wait ();
435	poll_cb ();	1925	poll_cb ();
436	}	1926	}
437	}
438		1927
439	int	1928	int
440	max_outstanding(nreqs)	1929	poll ()
441	int nreqs
442	PROTOTYPE: $
443	CODE:
444	RETVAL = max_outstanding;
445	max_outstanding = nreqs;
446
447	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
449	SV * pathname
450	int flags
451	int mode
452	SV * callback
453	PROTOTYPE: $$$;$
454	CODE:	1930	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);
466	req->fd = flags;
467	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469
470	send_req (req);
471	}
472
473	void
474	aio_close(fh,callback=&PL_sv_undef)
475	SV * fh
476	SV * callback
477	PROTOTYPE: $;$
478	ALIAS:
479	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC
482	CODE:
483	{
484	aio_req req;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490
491	req->type = ix;
492	req->fh = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495
496	send_req (req);
497	}
498
499	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501	SV * fh
502	UV offset
503	IV length
504	SV * data
505	IV dataoffset
506	SV * callback
507	ALIAS:
508	aio_read = REQ_READ
509	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$
511	CODE:
512	{
513	aio_req req;
514	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);
516
517	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);
519
520	if (dataoffset < 0)
521	dataoffset += svlen;
522
523	if (dataoffset < 0 || dataoffset > svlen)
524	croak ("data offset outside of string");
525
526	if (ix == REQ_WRITE)
527	{
528	/* write: check length and adjust. */
529	if (length < 0 || length + dataoffset > svlen)
530	length = svlen - dataoffset;
531	}
532	else
533	{
534	/* read: grow scalar as necessary */
535	svptr = SvGROW (data, length + dataoffset);
536	}
537
538	if (length < 0)
539	croak ("length must not be negative");
540
541	Newz (0, req, 1, aio_cb);
542
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;
547	req->fh = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));
550	req->offset = offset;
551	req->length = length;
552	req->data = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561	SV * fh
562	UV offset
563	IV length
564	SV * callback
565	PROTOTYPE: $$$;$
566	CODE:
567	{
568	aio_req req;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577
578	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;
582	req->length = length;
583	req->callback = SvREFCNT_inc (callback);
584
585	send_req (req);
586	}
587
588	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)
590	SV * fh_or_path
591	SV * callback
592	ALIAS:
593	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT
595	CODE:
596	{
597	aio_req req;
598
599	Newz (0, req, 1, aio_cb);
600
601	if (!req)
602	croak ("out of memory during aio_req allocation");
603
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");
608
609	if (SvPOK (fh_or_path))
610	{
611	req->type = ix;
612	req->data = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);
614	}
615	else
616	{
617	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}
621
622	req->callback = SvREFCNT_inc (callback);
623
624	send_req (req);
625	}
626
627	void
628	aio_unlink(pathname,callback=&PL_sv_undef)
629	SV * pathname
630	SV * callback
631	CODE:
632	{
633	aio_req req;
634
635	Newz (0, req, 1, aio_cb);
636
637	if (!req)
638	croak ("out of memory during aio_req allocation");
639
640	req->type = REQ_UNLINK;
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647
648	void
649	flush()
650	PROTOTYPE:
651	CODE:
652	while (nreqs)
653	{
654	poll_wait ();	1931	poll_wait ();
655	poll_cb ();	1932	RETVAL = poll_cb ();
656	}
657
658	void
659	poll()
660	PROTOTYPE:
661	CODE:
662	if (nreqs)
663	{
664	poll_wait ();
665	poll_cb ();
666	}
667
668	int
669	poll_fileno()
670	PROTOTYPE:
671	CODE:
672	RETVAL = respipe [0];
673	OUTPUT:	1933	OUTPUT:
674	RETVAL	1934	RETVAL
675		1935
676	int	1936	int
		1937	poll_fileno ()
		1938	CODE:
		1939	RETVAL = s_epipe_fd (&respipe);
		1940	OUTPUT:
		1941	RETVAL
		1942
		1943	int
677	poll_cb(...)	1944	poll_cb (...)
678	PROTOTYPE:	1945	PROTOTYPE:
679	CODE:	1946	CODE:
680	RETVAL = poll_cb ();	1947	RETVAL = poll_cb ();
681	OUTPUT:	1948	OUTPUT:
682	RETVAL	1949	RETVAL
683		1950
684	void	1951	void
685	poll_wait()	1952	poll_wait ()
686	PROTOTYPE:
687	CODE:	1953	CODE:
688	if (nreqs)
689	poll_wait ();	1954	poll_wait ();
690		1955
691	int	1956	int
692	nreqs()	1957	nreqs ()
693	PROTOTYPE:
694	CODE:	1958	CODE:
695	RETVAL = nreqs;	1959	RETVAL = eio_nreqs ();
696	OUTPUT:	1960	OUTPUT:
697	RETVAL	1961	RETVAL
698		1962
		1963	int
		1964	nready ()
		1965	CODE:
		1966	RETVAL = eio_nready ();
		1967	OUTPUT:
		1968	RETVAL
		1969
		1970	int
		1971	npending ()
		1972	CODE:
		1973	RETVAL = eio_npending ();
		1974	OUTPUT:
		1975	RETVAL
		1976
		1977	int
		1978	nthreads ()
		1979	CODE:
		1980	RETVAL = eio_nthreads ();
		1981	OUTPUT:
		1982	RETVAL
		1983
		1984	int
		1985	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1986	CODE:
		1987	RETVAL = posix_fadvise (fh, offset, length, advice);
		1988	OUTPUT:
		1989	RETVAL
		1990
		1991	IV
		1992	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1993	CODE:
		1994	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1995	OUTPUT:
		1996	RETVAL
		1997
		1998	void
		1999	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		2000	PPCODE:
		2001	sv_clear_foreign (scalar);
		2002	{
		2003	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		2004	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		2005	if (addr == (void *)-1)
		2006	XSRETURN_NO;
		2007
		2008	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2009
		2010	if (!(prot & PROT_WRITE))
		2011	SvREADONLY_on (scalar);
		2012
		2013	XSRETURN_YES;
		2014	}
		2015
		2016	void
		2017	munmap (SV *scalar)
		2018	CODE:
		2019	sv_clear_foreign (scalar);
		2020
		2021	int
		2022	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2023	ALIAS:
		2024	mprotect = 1
		2025	CODE:
		2026	{
		2027	STRLEN svlen;
		2028	void *addr = SvPVbyte (scalar, svlen);
		2029	STRLEN len = SvUV (length);
		2030
		2031	if (offset < 0)
		2032	offset += svlen;
		2033
		2034	if (offset < 0 || offset > svlen)
		2035	croak ("offset outside of scalar");
		2036
		2037	if (!SvOK (length) || len + offset > svlen)
		2038	len = svlen - offset;
		2039
		2040	addr = (void *)(((intptr_t)addr) + offset);
		2041	eio_page_align (&addr, &len);
		2042
		2043	switch (ix)
		2044	{
		2045	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2046	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2047	}
		2048	}
		2049	OUTPUT:
		2050	RETVAL
		2051
		2052	int
		2053	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		2054	CODE:
		2055	{
		2056	STRLEN svlen;
		2057	void *addr = SvPVbyte (scalar, svlen);
		2058	size_t len = SvUV (length);
		2059
		2060	if (offset < 0)
		2061	offset += svlen;
		2062
		2063	if (offset < 0 || offset > svlen)
		2064	croak ("offset outside of scalar");
		2065
		2066	if (!SvOK (length) || len + offset > svlen)
		2067	len = svlen - offset;
		2068
		2069	addr = (void *)(((intptr_t)addr) + offset);
		2070	eio_page_align (&addr, &len);
		2071	#if _POSIX_MEMLOCK_RANGE
		2072	RETVAL = munlock (addr, len);
		2073	#else
		2074	RETVAL = EIO_ENOSYS ();
		2075	#endif
		2076	}
		2077	OUTPUT:
		2078	RETVAL
		2079
		2080	int
		2081	munlockall ()
		2082	CODE:
		2083	#if _POSIX_MEMLOCK
		2084	munlockall ();
		2085	#else
		2086	RETVAL = EIO_ENOSYS ();
		2087	#endif
		2088	OUTPUT:
		2089	RETVAL
		2090
		2091	int
		2092	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2093	CODE:
		2094	{
		2095	#if HAVE_LINUX_SPLICE
		2096	loff_t off_in_, off_out_;
		2097	RETVAL = splice (
		2098	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2099	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2100	length, flags
		2101	);
		2102	#else
		2103	RETVAL = EIO_ENOSYS ();
		2104	#endif
		2105	}
		2106	OUTPUT:
		2107	RETVAL
		2108
		2109	int
		2110	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2111	CODE:
		2112	#if HAVE_LINUX_SPLICE
		2113	RETVAL = tee (rfh, wfh, length, flags);
		2114	#else
		2115	RETVAL = EIO_ENOSYS ();
		2116	#endif
		2117	OUTPUT:
		2118	RETVAL
		2119
		2120	int
		2121	pipesize (aio_rfd rfh, int new_size = -1)
		2122	PROTOTYPE: $;$
		2123	CODE:
		2124	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2125	if (new_size >= 0)
		2126	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2127	else
		2128	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2129	#else
		2130	errno = ENOSYS;
		2131	RETVAL = -1;
		2132	#endif
		2133	OUTPUT:
		2134	RETVAL
		2135
		2136	void
		2137	pipe2 (int flags = 0)
		2138	PROTOTYPE: ;$
		2139	PPCODE:
		2140	{
		2141	int fd[2];
		2142	int res;
		2143
		2144	if (flags)
		2145	#if HAVE_PIPE2
		2146	res = pipe2 (fd, flags);
		2147	#else
		2148	res = (errno = ENOSYS, -1);
		2149	#endif
		2150	else
		2151	res = pipe (fd);
		2152
		2153	if (!res)
		2154	{
		2155	EXTEND (SP, 2);
		2156	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2157	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2158	}
		2159	}
		2160
		2161	UV
		2162	get_fdlimit ()
		2163	CODE:
		2164	#if HAVE_RLIMITS
		2165	struct rlimit rl;
		2166	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2167	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2168	#endif
		2169	XSRETURN_UNDEF;
		2170	OUTPUT:
		2171	RETVAL
		2172
		2173	void
		2174	min_fdlimit (UV limit = 0x7fffffffU)
		2175	CODE:
		2176	{
		2177	#if HAVE_RLIMITS
		2178	struct rlimit rl;
		2179	rlim_t orig_rlim_max;
		2180	UV bit;
		2181
		2182	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2183	goto fail;
		2184
		2185	if (rl.rlim_cur == RLIM_INFINITY)
		2186	XSRETURN_YES;
		2187
		2188	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2189
		2190	if (rl.rlim_cur < limit)
		2191	{
		2192	rl.rlim_cur = limit;
		2193
		2194	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2195	rl.rlim_max = rl.rlim_cur;
		2196	}
		2197
		2198	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2199	XSRETURN_YES;
		2200
		2201	if (errno == EPERM)
		2202	{
		2203	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2204	/* our limit overflows a system-wide limit */
		2205	/* try an adaptive algorithm, but do not lower the hardlimit */
		2206	rl.rlim_max = 0;
		2207	for (bit = 0x40000000U; bit; bit >>= 1)
		2208	{
		2209	rl.rlim_max |= bit;
		2210	rl.rlim_cur = rl.rlim_max;
		2211
		2212	/* nevr decrease the hard limit */
		2213	if (rl.rlim_max < orig_rlim_max)
		2214	break;
		2215
		2216	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2217	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2218	}
		2219
		2220	/* now, raise the soft limit to the max permitted */
		2221	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2222	{
		2223	rl.rlim_cur = rl.rlim_max;
		2224	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2225	errno = EPERM;
		2226	}
		2227	}
		2228	#endif
		2229	fail:
		2230	XSRETURN_UNDEF;
		2231	}
		2232
		2233	void _on_next_submit (SV *cb)
		2234	CODE:
		2235	SvREFCNT_dec (on_next_submit);
		2236	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2237
		2238	PROTOTYPES: DISABLE
		2239
		2240	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2241
		2242	BOOT:
		2243	{
		2244	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2245	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2246	}
		2247
		2248	void
		2249	DESTROY (SV *self)
		2250	CODE:
		2251	{
		2252	aio_wd wd = SvAIO_WD (self);
		2253	#if HAVE_AT
		2254	{
		2255	SV *callback = &PL_sv_undef;
		2256	dREQ; /* clobbers next_pri :/ */
		2257	next_pri = req->pri; /* restore next_pri */
		2258	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2259	req->type = EIO_WD_CLOSE;
		2260	req->wd = wd;
		2261	REQ_SEND;
		2262	}
		2263	#else
		2264	eio_wd_close_sync (wd);
		2265	#endif
		2266	}
		2267
		2268	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2269
		2270	void
		2271	cancel (aio_req_ornot req)
		2272	CODE:
		2273	eio_cancel (req);
		2274
		2275	void
		2276	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2277	PPCODE:
		2278	{
		2279	if (GIMME_V != G_VOID)
		2280	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2281
		2282	if (items > 1)
		2283	{
		2284	SV *cb_cv = get_cb (callback);
		2285
		2286	SvREFCNT_dec (req->callback);
		2287	req->callback = SvREFCNT_inc (cb_cv);
		2288	}
		2289	}
		2290
		2291	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2292
		2293	void
		2294	add (aio_req grp, ...)
		2295	PPCODE:
		2296	{
		2297	int i;
		2298
		2299	if (grp->int1 == 2)
		2300	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2301
		2302	for (i = 1; i < items; ++i )
		2303	{
		2304	aio_req req;
		2305
		2306	if (GIMME_V != G_VOID)
		2307	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2308
		2309	req = SvAIO_REQ (ST (i));
		2310
		2311	if (req)
		2312	eio_grp_add (grp, req);
		2313	}
		2314	}
		2315
		2316	void
		2317	cancel_subs (aio_req_ornot req)
		2318	CODE:
		2319	req_cancel_subs (req);
		2320
		2321	void
		2322	result (aio_req grp, ...)
		2323	CODE:
		2324	{
		2325	int i;
		2326	AV *av;
		2327
		2328	grp->errorno = errno;
		2329
		2330	av = newAV ();
		2331	av_extend (av, items - 1);
		2332
		2333	for (i = 1; i < items; ++i )
		2334	av_push (av, newSVsv (ST (i)));
		2335
		2336	SvREFCNT_dec (grp->sv1);
		2337	grp->sv1 = (SV *)av;
		2338	}
		2339
		2340	void
		2341	errno (aio_req grp, int errorno = errno)
		2342	CODE:
		2343	grp->errorno = errorno;
		2344
		2345	void
		2346	limit (aio_req grp, int limit)
		2347	CODE:
		2348	eio_grp_limit (grp, limit);
		2349
		2350	void
		2351	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2352	CODE:
		2353	{
		2354	SvREFCNT_dec (grp->sv2);
		2355	grp->sv2 = newSVsv (callback);
		2356	grp->feed = aio_grp_feed;
		2357
		2358	if (grp->int2 <= 0)
		2359	grp->int2 = 2;
		2360
		2361	eio_grp_limit (grp, grp->int2);
		2362	}
		2363

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