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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.255 by root, Tue Feb 20 06:05:19 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
10	#include <pthread.h>	9	#include <stddef.h>
11		10	#include <stdlib.h>
		11	#include <errno.h>
12	#include <sys/types.h>	12	#include <sys/types.h>
13	#include <sys/stat.h>	13	#include <sys/stat.h>
14
15	#include <unistd.h>	14	#include <limits.h>
16	#include <fcntl.h>	15	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	16	#include <sched.h>
19		17
20	#if HAVE_SENDFILE	18	#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>	19	# include <sys/mman.h>
26	# elif __hpux	20	#endif
		21
		22	/* the incompetent fool that created musl keeps __linux__, refuses
		23	* to implement any linux standard apis, and also has no way to test
		24	* for his broken iplementation. don't complain to me if this fails
		25	* for you.
		26	*/
		27	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		28	# include <linux/fs.h>
		29	# ifdef FS_IOC_FIEMAP
		30	# include <linux/types.h>
		31	# include <linux/fiemap.h>
		32	# define HAVE_FIEMAP 1
		33	# endif
		34	#endif
		35
		36	/* perl namespace pollution */
		37	#undef VERSION
		38
		39	/* perl stupidly overrides readdir and maybe others */
		40	/* with thread-unsafe versions, imagine that :( */
		41	#undef readdir
		42	#undef opendir
		43	#undef closedir
		44
		45	#ifdef _WIN32
		46
		47	// perl overrides all those nice libc functions
		48
		49	#undef malloc
		50	#undef free
		51	#undef open
		52	#undef read
		53	#undef write
		54	#undef send
		55	#undef recv
		56	#undef stat
		57	#undef lstat
		58	#undef fstat
		59	#undef truncate
		60	#undef ftruncate
		61	#undef open
		62	#undef link
		63	#undef close
		64	#undef unlink
		65	#undef mkdir
		66	#undef rmdir
		67	#undef rename
		68	#undef lseek
		69	#undef opendir
		70	#undef readdir
		71	#undef closedir
		72	#undef chmod
		73	#undef fchmod
		74	#undef dup
		75	#undef dup2
		76	#undef abort
		77	#undef pipe
		78
		79	#define EIO_STRUCT_STAT struct _stati64
		80	#define EIO_STRUCT_STATI64
		81
		82	#else
		83
		84	#include <sys/time.h>
		85	#include <sys/select.h>
		86	#include <unistd.h>
		87	#include <utime.h>
		88	#include <signal.h>
		89
		90	#define EIO_STRUCT_STAT Stat_t
		91
		92	#endif
		93
		94	/*****************************************************************************/
		95
		96	#if __GNUC__ >= 3
		97	# define expect(expr,value) __builtin_expect ((expr),(value))
		98	#else
		99	# define expect(expr,value) (expr)
		100	#endif
		101
		102	#define expect_false(expr) expect ((expr) != 0, 0)
		103	#define expect_true(expr) expect ((expr) != 0, 1)
		104
		105	/*****************************************************************************/
		106
		107	#include "libeio/config.h"
		108
		109	#include "schmorp.h"
		110
		111	#if HAVE_EVENTFD
		112	# include <sys/eventfd.h>
		113	#endif
		114
		115	#if HAVE_TIMERFD
		116	# include <sys/timerfd.h>
		117	#endif
		118
		119	#if HAVE_RLIMITS
		120	#include <sys/time.h>
27	# include <sys/socket.h>	121	#include <sys/resource.h>
		122	#endif
		123
		124	typedef SV SV8; /* byte-sv, used for argument-checking */
		125	typedef int aio_rfd; /* read file desriptor */
		126	typedef int aio_wfd; /* write file descriptor */
		127
		128	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		129
		130	#define EIO_REQ_MEMBERS \
		131	SV *callback; \
		132	SV *sv1, *sv2; \
		133	SV *sv3, *sv4; \
		134	STRLEN stroffset; \
		135	SV *self;
		136
		137	#define EIO_NO_WRAPPERS 1
		138
		139	#include "libeio/eio.h"
		140
		141	static int req_invoke (eio_req *req);
		142	#define EIO_FINISH(req) req_invoke (req)
		143	static void req_destroy (eio_req *grp);
		144	#define EIO_DESTROY(req) req_destroy (req)
		145
		146	#include "libeio/eio.c"
		147
		148	#if !HAVE_POSIX_FADVISE
		149	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		150	#endif
		151
		152	#if !HAVE_POSIX_MADVISE
		153	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		154	#endif
		155
		156	#ifndef MAP_ANONYMOUS
		157	# ifdef MAP_ANON
		158	# define MAP_ANONYMOUS MAP_ANON
28	# else	159	# else
29	# error sendfile support requested but not available	160	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
30	# endif	161	# endif
31	#endif	162	#endif
32		163
33	#if __ia64	164	/* defines all sorts of constants to 0 unless they are already defined */
34	# define STACKSIZE 65536	165	/* also provides const_iv_ and const_niv_ macros for them */
35	#else	166	#include "def0.h"
36	# define STACKSIZE 4096
37	#endif
38		167
39	enum {	168	#ifndef makedev
40	REQ_QUIT,	169	# define makedev(maj,min) (((maj) << 8) | (min))
41	REQ_OPEN, REQ_CLOSE,	170	#endif
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,	171	#ifndef major
43	REQ_SENDFILE,	172	# define major(dev) ((dev) >> 8)
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	173	#endif
45	REQ_FSYNC, REQ_FDATASYNC,	174	#ifndef minor
46	REQ_UNLINK, REQ_RMDIR,	175	# define minor(dev) ((dev) & 0xff)
47	REQ_SYMLINK,	176	#endif
		177
		178	#if PAGESIZE <= 0
		179	# define PAGESIZE sysconf (_SC_PAGESIZE)
		180	#endif
		181
		182	/*****************************************************************************/
		183
		184	#if !_POSIX_MAPPED_FILES
		185	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		186	# define munmap(addr,length) EIO_ENOSYS ()
		187	#endif
		188
		189	#if !_POSIX_MEMORY_PROTECTION
		190	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		191	#endif
		192
		193	#define FOREIGN_MAGIC PERL_MAGIC_ext
		194
		195	static int ecb_cold
		196	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		197	{
		198	int old_errno = errno;
		199	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		200	errno = old_errno;
		201
		202	mg->mg_obj = 0; /* just in case */
		203
		204	SvREADONLY_off (sv);
		205
		206	if (SvPVX (sv) != mg->mg_ptr)
		207	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		208
		209	SvCUR_set (sv, 0);
		210	SvPVX (sv) = 0;
		211	SvOK_off (sv);
		212
		213	return 0;
		214	}
		215
		216	static MGVTBL mmap_vtbl = {
		217	0, 0, 0, 0, mmap_free
48	};	218	};
49		219
50	typedef struct aio_cb {	220	static int ecb_cold
51	struct aio_cb *volatile next;	221	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
52
53	int type;
54
55	int fd, fd2;
56	off_t offset;
57	size_t length;
58	ssize_t result;
59	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65
66	Stat_t *statdata;
67	} aio_cb;
68
69	typedef aio_cb *aio_req;
70
71	static int started, wanted;
72	static volatile int nreqs;
73	static int max_outstanding = 1<<30;
74	static int respipe [2];
75
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79
80	static volatile aio_req reqs, reqe; /* queue start, queue end */
81	static volatile aio_req ress, rese; /* queue start, queue end */
82
83	static void free_req (aio_req req)
84	{	222	{
85	if (req->data)	223	free (mg->mg_ptr);
86	SvREFCNT_dec (req->data);	224	mg->mg_obj = 0; /* just in case */
87		225
88	if (req->fh)	226	SvREADONLY_off (sv);
89	SvREFCNT_dec (req->fh);
90		227
91	if (req->fh2)	228	if (SvPVX (sv) != mg->mg_ptr)
92	SvREFCNT_dec (req->fh2);	229	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
93		230
94	if (req->statdata)	231	SvCUR_set (sv, 0);
95	Safefree (req->statdata);	232	SvPVX (sv) = 0;
		233	SvOK_off (sv);
96		234
97	if (req->callback)	235	return 0;
98	SvREFCNT_dec (req->callback);
99
100	Safefree (req);
101	}	236	}
102		237
		238	static MGVTBL sysfree_vtbl = {
		239	0, 0, 0, 0, sysfree_free
		240	};
		241
		242	/*****************************************************************************/
		243
		244	/* helper: set scalar to foreign ptr with custom free */
103	static void	245	static void
104	poll_wait ()	246	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
105	{	247	{
106	if (nreqs && !ress)	248	sv_force_normal (sv);
107	{
108	fd_set rfd;
109	FD_ZERO(&rfd);
110	FD_SET(respipe [0], &rfd);
111		249
112	select (respipe [0] + 1, &rfd, 0, 0, 0);	250	/* we store the length in mg_obj, as namlen is I32 :/ */
113	}	251	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
114	}	252	->mg_obj = (SV *)length;
115		253
		254	SvUPGRADE (sv, SVt_PV); /* nop... */
		255
		256	if (SvLEN (sv))
		257	Safefree (SvPVX (sv));
		258
		259	SvPVX (sv) = (char *)addr;
		260	SvCUR_set (sv, length);
		261	SvLEN_set (sv, 0);
		262	SvPOK_only (sv);
		263	}
		264
116	static int	265	static void
117	poll_cb ()	266	sv_clear_foreign (SV *sv)
118	{	267	{
119	dSP;	268	/* todo: iterate over magic and only free ours, but of course */
		269	/* the perl5porters will call that (correct) behaviour buggy */
		270	sv_unmagic (sv, FOREIGN_MAGIC);
		271	}
		272
		273	/*****************************************************************************/
		274
		275	static void
		276	fiemap (eio_req *req)
		277	{
		278	req->result = -1;
		279
		280	#if HAVE_FIEMAP
		281	/* assume some c99 */
		282	struct fiemap *fiemap = 0;
		283	size_t end_offset;
		284	int count = req->int3;
		285
		286	req->flags |= EIO_FLAG_PTR1_FREE;
		287
		288	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		289	/* increase in 3.5kb steps */
		290	if (count < 0)
120	int count = 0;	291	count = 8;
121	int do_croak = 0;	292
122	aio_req req;	293	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		294	errno = ENOMEM;
		295	if (!fiemap)
		296	return;
		297
		298	req->ptr1 = fiemap;
		299
		300	fiemap->fm_start = req->offs;
		301	fiemap->fm_length = req->size;
		302	fiemap->fm_flags = req->int2;
		303	fiemap->fm_extent_count = count;
		304
		305	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		306	return;
		307
		308	if (req->int3 >= 0 /* not autosizing */
		309	|| !fiemap->fm_mapped_extents /* no more extents */
		310	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		311	goto done;
		312
		313	/* else we have to loop -
		314	* it would be tempting (actually I tried that first) to just query the
		315	* number of extents needed, but linux often feels like not returning all
		316	* extents, without telling us it left any out. this complicates
		317	* this quite a bit.
		318	*/
		319
		320	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
123		321
124	for (;;)	322	for (;;)
125	{	323	{
126	pthread_mutex_lock (&reslock);	324	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
127	req = ress;	325	char scratch[3072];
		326	struct fiemap *incmap = (struct fiemap *)scratch;
128		327
		328	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		329	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		330	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		331	incmap->fm_flags = fiemap->fm_flags;
		332	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		333
		334	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		335	return;
		336
		337	if (!incmap->fm_mapped_extents)
		338	goto done;
		339
		340	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		341	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		342	errno = ENOMEM;
129	if (req)	343	if (!fiemap)
		344	return;
		345
		346	req->ptr1 = fiemap;
		347
		348	for (count = 0; count < incmap->fm_mapped_extents; ++count)
130	{	349	{
131	ress = req->next;	350	struct fiemap_extent *e = incmap->fm_extents + count;
132		351
133	if (!ress)	352	if (e->fe_logical + e->fe_length >= end_offset)
134	{	353	goto done;
135	/* read any signals sent by the worker threads */
136	char buf [32];
137	while (read (respipe [0], buf, 32) == 32)
138	;
139		354
140	rese = 0;	355	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
141	}	356
		357	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		358	goto done;
		359
142	}	360	}
		361	}
143		362
144	pthread_mutex_unlock (&reslock);	363	done:
		364	req->result = 0;
145		365
146	if (!req)	366	#else
147	break;	367	errno = ENOSYS;
		368	#endif
		369	}
148		370
149	nreqs--;	371	/*****************************************************************************/
150		372
151	if (req->type == REQ_QUIT)	373	enum {
152	started--;	374	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
153	else	375	};
		376
		377	typedef eio_req *aio_req;
		378	typedef eio_req *aio_req_ornot;
		379	typedef eio_wd aio_wd;
		380
		381	static SV *on_next_submit;
		382	static int next_pri = EIO_PRI_DEFAULT;
		383	static int max_outstanding;
		384
		385	static s_epipe respipe;
		386
		387	static void req_destroy (aio_req req);
		388	static void req_cancel (aio_req req);
		389
		390	static void
		391	want_poll (void)
		392	{
		393	/* write a dummy byte to the pipe so fh becomes ready */
		394	s_epipe_signal (&respipe);
		395	}
		396
		397	static void
		398	done_poll (void)
		399	{
		400	/* read any signals sent by the worker threads */
		401	s_epipe_drain (&respipe);
		402	}
		403
		404	/* must be called at most once */
		405	static SV *
		406	req_sv (aio_req req, HV *stash)
		407	{
		408	if (!req->self)
		409	{
		410	req->self = (SV *)newHV ();
		411	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		412	}
		413
		414	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		415	}
		416
		417	static SV *
		418	newSVaio_wd (aio_wd wd)
		419	{
		420	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		421	}
		422
		423	static aio_req
		424	SvAIO_REQ (SV *sv)
		425	{
		426	MAGIC *mg;
		427
		428	if (!SvROK (sv)
		429	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		430	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		431	&& SvSTASH (SvRV (sv)) != aio_req_stash
		432	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		433	croak ("object of class IO::AIO::REQ expected");
		434
		435	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		436
		437	return mg ? (aio_req)mg->mg_ptr : 0;
		438	}
		439
		440	static aio_wd
		441	SvAIO_WD (SV *sv)
		442	{
		443	if (!SvROK (sv)
		444	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		445	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		446	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		447
		448	return (aio_wd)(long)SvIVX (SvRV (sv));
		449	}
		450
		451	static SV *
		452	newmortalFH (int fd, int flags)
		453	{
		454	if (fd < 0)
		455	return &PL_sv_undef;
		456
		457	GV *gv = (GV *)sv_newmortal ();
		458	char sym[64];
		459	int symlen;
		460
		461	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		462	gv_init (gv, aio_stash, sym, symlen, 0);
		463
		464	symlen = snprintf (
		465	sym,
		466	sizeof (sym),
		467	"%s&=%d",
		468	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		469	fd
		470	);
		471
		472	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		473	? (SV *)gv : &PL_sv_undef;
		474	}
		475
		476	static void
		477	aio_grp_feed (aio_req grp)
		478	{
		479	if (grp->sv2 && SvOK (grp->sv2))
		480	{
		481	dSP;
		482
		483	ENTER;
		484	SAVETMPS;
		485	PUSHMARK (SP);
		486	XPUSHs (req_sv (grp, aio_grp_stash));
		487	PUTBACK;
		488	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		489	SPAGAIN;
		490	FREETMPS;
		491	LEAVE;
		492	}
		493	}
		494
		495	static void
		496	req_submit (eio_req *req)
		497	{
		498	eio_submit (req);
		499
		500	if (expect_false (on_next_submit))
		501	{
		502	dSP;
		503	SV *cb = sv_2mortal (on_next_submit);
		504
		505	on_next_submit = 0;
		506
		507	PUSHMARK (SP);
		508	PUTBACK;
		509	call_sv (cb, G_DISCARD | G_EVAL);
		510	}
		511	}
		512
		513	static int
		514	req_invoke (eio_req *req)
		515	{
		516	if (req->flags & FLAG_SV2_RO_OFF)
		517	SvREADONLY_off (req->sv2);
		518
		519	if (!EIO_CANCELLED (req) && req->callback)
		520	{
		521	dSP;
		522	static SV *sv_result_cache; /* caches the result integer SV */
		523	SV *sv_result;
		524
		525	ENTER;
		526	SAVETMPS;
		527	PUSHMARK (SP);
		528	EXTEND (SP, 1);
		529
		530	/* do not recreate the result IV from scratch each time */
		531	if (expect_true (sv_result_cache))
154	{	532	{
155	int errorno = errno;	533	sv_result = sv_result_cache; sv_result_cache = 0;
156	errno = req->errorno;	534	SvIV_set (sv_result, req->result);
157		535	SvIOK_only (sv_result);
158	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);
163
164	if (req->statdata)
165	{
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);
169	}
170
171	ENTER;
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174
175	if (req->type == REQ_OPEN)
176	{
177	/* convert fd to fh */
178	SV *fh;
179
180	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
182	SPAGAIN;
183
184	fh = SvREFCNT_inc (POPs);
185
186	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));
188	}
189
190	if (SvOK (req->callback))
191	{
192	PUTBACK;
193	call_sv (req->callback, G_VOID | G_EVAL);
194	SPAGAIN;
195
196	if (SvTRUE (ERRSV))
197	{
198	free_req (req);
199	croak (0);
200	}
201	}
202
203	LEAVE;
204
205	errno = errorno;
206	count++;
207	}
208
209	free_req (req);
210	}
211
212	return count;
213	}
214
215	static void *aio_proc(void *arg);
216
217	static void
218	start_thread (void)
219	{
220	sigset_t fullsigset, oldsigset;
221	pthread_t tid;
222	pthread_attr_t attr;
223
224	pthread_attr_init (&attr);
225	pthread_attr_setstacksize (&attr, STACKSIZE);
226	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227
228	sigfillset (&fullsigset);
229	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230
231	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
232	started++;
233
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}
236
237	static void
238	send_req (aio_req req)
239	{
240	while (started < wanted && nreqs >= started)
241	start_thread ();
242
243	nreqs++;
244
245	pthread_mutex_lock (&reqlock);
246
247	req->next = 0;
248
249	if (reqe)
250	{
251	reqe->next = req;
252	reqe = req;
253	}
254	else
255	reqe = reqs = req;
256
257	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);
259
260	if (nreqs > max_outstanding)
261	for (;;)
262	{
263	poll_cb ();
264
265	if (nreqs <= max_outstanding)
266	break;
267
268	poll_wait ();
269	}
270	}
271
272	static void
273	end_thread (void)
274	{
275	aio_req req;
276	Newz (0, req, 1, aio_cb);
277	req->type = REQ_QUIT;
278
279	send_req (req);
280	}
281
282	static void min_parallel (int nthreads)
283	{
284	if (wanted < nthreads)
285	wanted = nthreads;
286	}
287
288	static void max_parallel (int nthreads)
289	{
290	int cur = started;
291
292	if (wanted > nthreads)
293	wanted = nthreads;
294
295	while (cur > wanted)
296	{
297	end_thread ();
298	cur--;
299	}
300
301	while (started > wanted)
302	{
303	poll_wait ();
304	poll_cb ();
305	}
306	}
307
308	static void create_pipe ()
309	{
310	if (pipe (respipe))
311	croak ("unable to initialize result pipe");
312
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");
315
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}
331
332	static void atfork_child (void)
333	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();
359
360	atfork_parent ();
361	}
362
363	/*****************************************************************************/
364	/* work around various missing functions */
365
366	#if !HAVE_PREADWRITE
367	# define pread aio_pread
368	# define pwrite aio_pwrite
369
370	/*
371	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.
374	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
376
377	static ssize_t
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{
380	ssize_t res;
381	off_t ooffset;
382
383	pthread_mutex_lock (&iolock);
384	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);
389
390	return res;
391	}
392
393	static ssize_t
394	pwrite (int fd, void *buf, size_t count, off_t offset)
395	{
396	ssize_t res;
397	off_t ooffset;
398
399	pthread_mutex_lock (&iolock);
400	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);
405
406	return res;
407	}
408	#endif
409
410	#if !HAVE_FDATASYNC
411	# define fdatasync fsync
412	#endif
413
414	#if !HAVE_READAHEAD
415	# define readahead aio_readahead
416
417	static char readahead_buf[4096];
418
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)
421	{
422	while (count > 0)
423	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
425
426	pread (fd, readahead_buf, len, offset);
427	offset += len;
428	count -= len;
429	}
430
431	errno = 0;
432	}
433	#endif
434
435	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
438	{
439	ssize_t res;
440
441	if (!count)
442	return 0;
443
444	#if __linux
445	res = sendfile (ofd, ifd, &offset, count);
446
447	#elif __freebsd
448	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.
451	*/
452	{
453	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455
456	if (!res && errno == EAGAIN)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */
458	res = sbytes;
459	}
460
461	#elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);
463
464	#else
465	res = -1;
466	errno = ENOSYS;
467	#endif
468
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
470	{
471	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);
473	res = 0;
474
475	for (;;)
476	{
477	ssize_t cnt;
478
479	cnt = pread (ifd, buf, 4096, offset);
480
481	if (cnt <= 0)
482	{
483	if (cnt && !res) res = -1;
484	break;
485	}
486
487	cnt = write (ofd, buf, cnt);
488
489	if (cnt <= 0)
490	{
491	if (cnt && !res) res = -1;
492	break;
493	}
494
495	offset += cnt;
496	res += cnt;
497	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}
505
506	return res;
507	}
508
509	/*****************************************************************************/
510
511	static void *
512	aio_proc (void *thr_arg)
513	{
514	aio_req req;
515	int type;
516
517	do
518	{
519	pthread_mutex_lock (&reqlock);
520
521	for (;;)
522	{
523	req = reqs;
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530
531	if (req)
532	break;
533
534	pthread_cond_wait (&reqwait, &reqlock);
535	}
536
537	pthread_mutex_unlock (&reqlock);
538
539	errno = 0; /* strictly unnecessary */
540
541	type = req->type;
542
543	switch (type)
544	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
546	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
549	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
550
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;
563
564	case REQ_QUIT:
565	break;
566
567	default:
568	req->result = ENOSYS;
569	break;
570	}
571
572	req->errorno = errno;
573
574	pthread_mutex_lock (&reslock);
575
576	req->next = 0;
577
578	if (rese)
579	{
580	rese->next = req;
581	rese = req;
582	}	536	}
583	else	537	else
584	{	538	{
585	rese = ress = req;	539	sv_result = newSViv (req->result);
586		540	SvREADONLY_on (sv_result);
587	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);
589	}	541	}
590		542
591	pthread_mutex_unlock (&reslock);	543	switch (req->type)
		544	{
		545	case EIO_WD_OPEN:
		546	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		547	break;
		548
		549	case EIO_READDIR:
		550	{
		551	SV *rv = &PL_sv_undef;
		552
		553	if (req->result >= 0)
		554	{
		555	int i;
		556	char *names = (char *)req->ptr2;
		557	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		558	AV *av = newAV ();
		559
		560	av_extend (av, req->result - 1);
		561
		562	for (i = 0; i < req->result; ++i)
		563	{
		564	if (req->int1 & EIO_READDIR_DENTS)
		565	{
		566	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		567
		568	if (req->int1 & EIO_READDIR_CUSTOM2)
		569	{
		570	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		571	AV *avent = newAV ();
		572
		573	av_extend (avent, 2);
		574
		575	if (!sv_type [ent->type])
		576	{
		577	sv_type [ent->type] = newSViv (ent->type);
		578	SvREADONLY_on (sv_type [ent->type]);
		579	}
		580
		581	av_store (avent, 0, namesv);
		582	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		583	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		584
		585	av_store (av, i, newRV_noinc ((SV *)avent));
		586	}
		587	else
		588	av_store (av, i, namesv);
		589
		590	++ent;
		591	}
		592	else
		593	{
		594	SV *name = newSVpv (names, 0);
		595	av_store (av, i, name);
		596	names += SvCUR (name) + 1;
		597	}
		598	}
		599
		600	rv = sv_2mortal (newRV_noinc ((SV *)av));
		601	}
		602
		603	PUSHs (rv);
		604
		605	if (req->int1 & EIO_READDIR_CUSTOM1)
		606	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		607	}
		608	break;
		609
		610	case EIO_OPEN:
		611	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		612	break;
		613
		614	case EIO_STATVFS:
		615	case EIO_FSTATVFS:
		616	{
		617	SV *rv = &PL_sv_undef;
		618
		619	#ifndef _WIN32
		620	if (req->result >= 0)
		621	{
		622	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		623	HV *hv = newHV ();
		624	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		625	* chooses to make it a struct.
		626	*/
		627	unsigned long fsid = 0;
		628	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		629
		630	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		631
		632	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		633	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		634	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		635	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		636	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		637	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		638	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		639	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		640	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		641	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		642	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		643	}
		644	#endif
		645
		646	PUSHs (rv);
		647	}
		648
		649	break;
		650
		651	case EIO_GROUP:
		652	req->int1 = 2; /* mark group as finished */
		653
		654	if (req->sv1)
		655	{
		656	int i;
		657	AV *av = (AV *)req->sv1;
		658
		659	EXTEND (SP, AvFILL (av) + 1);
		660	for (i = 0; i <= AvFILL (av); ++i)
		661	PUSHs (*av_fetch (av, i, 0));
		662	}
		663	break;
		664
		665	case EIO_NOP:
		666	case EIO_BUSY:
		667	break;
		668
		669	case EIO_READLINK:
		670	case EIO_REALPATH:
		671	if (req->result > 0)
		672	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		673	break;
		674
		675	case EIO_STAT:
		676	case EIO_LSTAT:
		677	case EIO_FSTAT:
		678	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		679
		680	if (!(PL_laststatval = req->result))
		681	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		682	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		683
		684	PUSHs (sv_result);
		685	break;
		686
		687	case EIO_SEEK:
		688	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		689	break;
		690
		691	case EIO_READ:
		692	{
		693	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		694	*SvEND (req->sv2) = 0;
		695	SvPOK_only (req->sv2);
		696	SvSETMAGIC (req->sv2);
		697	PUSHs (sv_result);
		698	}
		699	break;
		700
		701	case EIO_SLURP:
		702	{
		703	if (req->result >= 0)
		704	{
		705	/* if length was originally not known, we steal the malloc'ed memory */
		706	if (req->flags & EIO_FLAG_PTR2_FREE)
		707	{
		708	req->flags &= ~EIO_FLAG_PTR2_FREE;
		709	sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
		710	}
		711	else
		712	{
		713	SvCUR_set (req->sv2, req->result);
		714	*SvEND (req->sv2) = 0;
		715	SvPOK_only (req->sv2);
		716	}
		717
		718	SvSETMAGIC (req->sv2);
		719	}
		720
		721	PUSHs (sv_result);
		722	}
		723	break;
		724
		725	case EIO_CUSTOM:
		726	if (req->feed == fiemap)
		727	{
		728	#if HAVE_FIEMAP
		729	if (!req->result)
		730	{
		731	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		732
		733	if (fiemap->fm_extent_count)
		734	{
		735	AV *av = newAV ();
		736	int i;
		737
		738	while (fiemap->fm_mapped_extents)
		739	{
		740	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		741	AV *ext_av = newAV ();
		742
		743	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		744	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		745	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		746	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		747
		748	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		749	}
		750
		751	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		752	}
		753	else
		754	{
		755	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		756	PUSHs (sv_result);
		757	}
		758	}
		759	#endif
		760	}
		761	else
		762	PUSHs (sv_result);
		763	break;
		764
		765	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		766	if (req->result > 0)
		767	SvIV_set (sv_result, 0);
		768	/* FALLTHROUGH */
		769
		770	default:
		771	PUSHs (sv_result);
		772	break;
		773	}
		774
		775	errno = req->errorno;
		776
		777	PUTBACK;
		778	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		779	SPAGAIN;
		780
		781	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		782	SvREFCNT_dec (sv_result);
		783	else
		784	sv_result_cache = sv_result;
		785
		786	FREETMPS;
		787	LEAVE;
		788
		789	PUTBACK;
592	}	790	}
593	while (type != REQ_QUIT);
594		791
		792	return !!SvTRUE (ERRSV);
		793	}
		794
		795	static void
		796	req_destroy (aio_req req)
		797	{
		798	if (req->self)
		799	{
		800	sv_unmagic (req->self, PERL_MAGIC_ext);
		801	SvREFCNT_dec (req->self);
		802	}
		803
		804	SvREFCNT_dec (req->sv1);
		805	SvREFCNT_dec (req->sv2);
		806	SvREFCNT_dec (req->sv3);
		807	SvREFCNT_dec (req->sv4);
		808	SvREFCNT_dec (req->callback);
		809
		810	free (req);
		811	}
		812
		813	static void
		814	req_cancel_subs (aio_req grp)
		815	{
		816	if (grp->type != EIO_GROUP)
		817	return;
		818
		819	SvREFCNT_dec (grp->sv2);
		820	grp->sv2 = 0;
		821
		822	eio_grp_cancel (grp);
		823	}
		824
		825	static void ecb_cold
		826	create_respipe (void)
		827	{
		828	if (s_epipe_renew (&respipe))
		829	croak ("IO::AIO: unable to initialize result pipe");
		830	}
		831
		832	static void
		833	poll_wait (void)
		834	{
		835	while (eio_nreqs ())
		836	{
		837	int size;
		838
		839	X_LOCK (EIO_POOL->reslock);
		840	size = EIO_POOL->res_queue.size;
		841	X_UNLOCK (EIO_POOL->reslock);
		842
		843	if (size)
		844	return;
		845
		846	etp_maybe_start_thread (EIO_POOL);
		847
		848	s_epipe_wait (&respipe);
		849	}
		850	}
		851
		852	static int
		853	poll_cb (void)
		854	{
		855	for (;;)
		856	{
		857	int res = eio_poll ();
		858
		859	if (res > 0)
		860	croak (0);
		861
		862	if (!max_outstanding || max_outstanding > eio_nreqs ())
		863	return res;
		864
		865	poll_wait ();
		866	}
		867	}
		868
		869	static void ecb_cold
		870	reinit (void)
		871	{
		872	create_respipe ();
		873
		874	if (eio_init (want_poll, done_poll) < 0)
		875	croak ("IO::AIO: unable to initialise eio library");
		876	}
		877
		878	/*****************************************************************************/
		879
		880	static SV *
		881	get_cb (SV *cb_sv)
		882	{
		883	SvGETMAGIC (cb_sv);
		884	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		885	}
		886
		887	static aio_req ecb_noinline
		888	dreq (SV *callback)
		889	{
		890	SV *cb_cv;
		891	aio_req req;
		892	int req_pri = next_pri;
		893	next_pri = EIO_PRI_DEFAULT;
		894
		895	cb_cv = get_cb (callback);
		896
		897	req = calloc (sizeof (*req), 1);
		898	if (!req)
		899	croak ("out of memory during eio_req allocation");
		900
		901	req->callback = SvREFCNT_inc (cb_cv);
		902	req->pri = req_pri;
		903
595	return 0;	904	return req;
596	}	905	}
597		906
598	#define dREQ \	907	#define dREQ \
599	aio_req req; \	908	aio_req req = dreq (callback); \
		909
		910	#define REQ_SEND \
		911	PUTBACK; \
		912	req_submit (req); \
		913	SPAGAIN; \
600	\	914	\
601	if (SvOK (callback) && !SvROK (callback)) \	915	if (GIMME_V != G_VOID) \
602	croak ("clalback must be undef or of reference type"); \	916	XPUSHs (req_sv (req, aio_req_stash));
603	\	917
604	Newz (0, req, 1, aio_cb); \	918	ecb_inline void
605	if (!req) \	919	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
606	croak ("out of memory during aio_req allocation"); \	920	{
607	\	921	if (expect_false (SvROK (path)))
608	req->callback = newSVsv (callback);	922	{
609		923	SV *rv = SvRV (path);
		924	SV *wdob;
		925
		926	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		927	{
		928	path = AvARRAY (rv)[1];
		929	wdob = AvARRAY (rv)[0];
		930
		931	if (SvOK (wdob))
		932	{
		933	*wd = SvAIO_WD (wdob);
		934	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		935	}
		936	else
		937	*wd = EIO_INVALID_WD;
		938	}
		939	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		940	{
		941	*wd = (aio_wd)(long)SvIVX (rv);
		942	*wdsv = SvREFCNT_inc_NN (rv);
		943	*ptr = ".";
		944	return; /* path set to "." */
		945	}
		946	else
		947	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		948	}
		949
		950	*pathsv = newSVsv (path);
		951	*ptr = SvPVbyte_nolen (*pathsv);
		952	}
		953
		954	static void ecb_noinline
		955	req_set_path1 (aio_req req, SV *path)
		956	{
		957	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		958	}
		959
		960	static void ecb_noinline
		961	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		962	{
		963	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		964
		965	switch (SvTYPE (rv))
		966	{
		967	case SVt_PVIO:
		968	case SVt_PVLV:
		969	case SVt_PVGV:
		970	req->type = type_fh;
		971	req->sv1 = newSVsv (fh_or_path);
		972	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		973	break;
		974
		975	default:
		976	req->type = type_path;
		977	req_set_path1 (req, fh_or_path);
		978	break;
		979	}
		980	}
		981
		982	/*****************************************************************************/
		983
		984	static void
		985	ts_set (struct timespec *ts, NV value)
		986	{
		987	ts->tv_sec = value;
		988	ts->tv_nsec = (value - ts->tv_sec) * 1e9;
		989	}
		990
		991	static NV
		992	ts_get (const struct timespec *ts)
		993	{
		994	return ts->tv_sec + ts->tv_nsec * 1e-9;
		995	}
		996
		997	/*****************************************************************************/
		998
		999	XS(boot_IO__AIO) ecb_cold;
		1000
610	MODULE = IO::AIO PACKAGE = IO::AIO	1001	MODULE = IO::AIO PACKAGE = IO::AIO
611		1002
612	PROTOTYPES: ENABLE	1003	PROTOTYPES: ENABLE
613		1004
614	BOOT:	1005	BOOT:
615	{	1006	{
616	create_pipe ();	1007	static const struct {
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1008	const char *name;
618	}	1009	IV iv;
		1010	} *civ, const_iv[] = {
		1011	# define const_niv(name, value) { # name, (IV) value },
		1012	# define const_iv(name) { # name, (IV) name },
		1013	# define const_eio(name) { # name, (IV) EIO_ ## name },
619		1014
		1015	/* you have to re-run ./gendef0 after adding/removing any constants here */
		1016	/* the first block can be undef if missing */
		1017	const_iv (ENOSYS)
		1018	const_iv (EXDEV)
		1019	const_iv (EBADR)
		1020
		1021	/* for lseek */
		1022	const_iv (SEEK_DATA)
		1023	const_iv (SEEK_HOLE)
		1024
		1025	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		1026	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		1027	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		1028	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		1029	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		1030	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		1031
		1032	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		1033	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		1034	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		1035	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1036	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		1037
		1038	/* the second block will be 0 when missing */
		1039	const_iv (O_RDONLY)
		1040	const_iv (O_WRONLY)
		1041	const_iv (O_RDWR)
		1042	const_iv (O_CREAT)
		1043	const_iv (O_TRUNC)
		1044	const_iv (O_EXCL)
		1045	const_iv (O_APPEND)
		1046
		1047	const_iv (O_ASYNC)
		1048	const_iv (O_DIRECT)
		1049	const_iv (O_NOATIME)
		1050
		1051	const_iv (O_CLOEXEC)
		1052	const_iv (O_NOCTTY)
		1053	const_iv (O_NOFOLLOW)
		1054	const_iv (O_NONBLOCK)
		1055	const_iv (O_EXEC)
		1056	const_iv (O_SEARCH)
		1057	const_iv (O_DIRECTORY)
		1058	const_iv (O_DSYNC)
		1059	const_iv (O_RSYNC)
		1060	const_iv (O_SYNC)
		1061	const_iv (O_PATH)
		1062	const_iv (O_TMPFILE)
		1063	const_iv (O_TTY_INIT)
		1064
		1065	const_iv (S_IFIFO)
		1066	const_iv (S_IFCHR)
		1067	const_iv (S_IFBLK)
		1068	const_iv (S_IFLNK)
		1069	const_iv (S_IFREG)
		1070	const_iv (S_IFDIR)
		1071	const_iv (S_IFWHT)
		1072	const_iv (S_IFSOCK)
		1073	const_iv (S_IFMT)
		1074
		1075	const_iv (ST_RDONLY)
		1076	const_iv (ST_NOSUID)
		1077	const_iv (ST_NODEV)
		1078	const_iv (ST_NOEXEC)
		1079	const_iv (ST_SYNCHRONOUS)
		1080	const_iv (ST_MANDLOCK)
		1081	const_iv (ST_WRITE)
		1082	const_iv (ST_APPEND)
		1083	const_iv (ST_IMMUTABLE)
		1084	const_iv (ST_NOATIME)
		1085	const_iv (ST_NODIRATIME)
		1086	const_iv (ST_RELATIME)
		1087
		1088	const_iv (PROT_NONE)
		1089	const_iv (PROT_EXEC)
		1090	const_iv (PROT_READ)
		1091	const_iv (PROT_WRITE)
		1092
		1093	const_iv (MAP_PRIVATE)
		1094	const_iv (MAP_SHARED)
		1095	const_iv (MAP_FIXED)
		1096	const_iv (MAP_ANONYMOUS)
		1097
		1098	/* linuxish */
		1099	const_iv (MAP_LOCKED)
		1100	const_iv (MAP_NORESERVE)
		1101	const_iv (MAP_POPULATE)
		1102	const_iv (MAP_NONBLOCK)
		1103	const_iv (MAP_GROWSDOWN)
		1104	const_iv (MAP_32BIT)
		1105	const_iv (MAP_HUGETLB)
		1106	const_iv (MAP_STACK)
		1107
		1108	const_iv (F_DUPFD_CLOEXEC)
		1109
		1110	const_iv (F_OFD_GETLK)
		1111	const_iv (F_OFD_SETLK)
		1112	const_iv (F_OFD_GETLKW)
		1113
		1114	const_iv (FIFREEZE)
		1115	const_iv (FITHAW)
		1116	const_iv (FITRIM)
		1117	const_iv (FICLONE)
		1118	const_iv (FICLONERANGE)
		1119	const_iv (FIDEDUPERANGE)
		1120
		1121	const_iv (FS_IOC_GETFLAGS)
		1122	const_iv (FS_IOC_SETFLAGS)
		1123	const_iv (FS_IOC_GETVERSION)
		1124	const_iv (FS_IOC_SETVERSION)
		1125	const_iv (FS_IOC_FIEMAP)
		1126	const_iv (FS_IOC_FSGETXATTR)
		1127	const_iv (FS_IOC_FSSETXATTR)
		1128	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1129	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1130	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1131
		1132	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1133
		1134	const_iv (FS_SECRM_FL)
		1135	const_iv (FS_UNRM_FL)
		1136	const_iv (FS_COMPR_FL)
		1137	const_iv (FS_SYNC_FL)
		1138	const_iv (FS_IMMUTABLE_FL)
		1139	const_iv (FS_APPEND_FL)
		1140	const_iv (FS_NODUMP_FL)
		1141	const_iv (FS_NOATIME_FL)
		1142	const_iv (FS_DIRTY_FL)
		1143	const_iv (FS_COMPRBLK_FL)
		1144	const_iv (FS_NOCOMP_FL)
		1145	const_iv (FS_ENCRYPT_FL)
		1146	const_iv (FS_BTREE_FL)
		1147	const_iv (FS_INDEX_FL)
		1148	const_iv (FS_JOURNAL_DATA_FL)
		1149	const_iv (FS_NOTAIL_FL)
		1150	const_iv (FS_DIRSYNC_FL)
		1151	const_iv (FS_TOPDIR_FL)
		1152	const_iv (FS_FL_USER_MODIFIABLE)
		1153
		1154	const_iv (FS_XFLAG_REALTIME)
		1155	const_iv (FS_XFLAG_PREALLOC)
		1156	const_iv (FS_XFLAG_IMMUTABLE)
		1157	const_iv (FS_XFLAG_APPEND)
		1158	const_iv (FS_XFLAG_SYNC)
		1159	const_iv (FS_XFLAG_NOATIME)
		1160	const_iv (FS_XFLAG_NODUMP)
		1161	const_iv (FS_XFLAG_RTINHERIT)
		1162	const_iv (FS_XFLAG_PROJINHERIT)
		1163	const_iv (FS_XFLAG_NOSYMLINKS)
		1164	const_iv (FS_XFLAG_EXTSIZE)
		1165	const_iv (FS_XFLAG_EXTSZINHERIT)
		1166	const_iv (FS_XFLAG_NODEFRAG)
		1167	const_iv (FS_XFLAG_FILESTREAM)
		1168	const_iv (FS_XFLAG_DAX)
		1169	const_iv (FS_XFLAG_HASATTR)
		1170
		1171	const_iv (FIEMAP_FLAG_SYNC)
		1172	const_iv (FIEMAP_FLAG_XATTR)
		1173	const_iv (FIEMAP_FLAGS_COMPAT)
		1174	const_iv (FIEMAP_EXTENT_LAST)
		1175	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1176	const_iv (FIEMAP_EXTENT_DELALLOC)
		1177	const_iv (FIEMAP_EXTENT_ENCODED)
		1178	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1179	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1180	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1181	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1182	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1183	const_iv (FIEMAP_EXTENT_MERGED)
		1184	const_iv (FIEMAP_EXTENT_SHARED)
		1185
		1186	const_iv (SPLICE_F_MOVE)
		1187	const_iv (SPLICE_F_NONBLOCK)
		1188	const_iv (SPLICE_F_MORE)
		1189	const_iv (SPLICE_F_GIFT)
		1190
		1191	const_iv (EFD_CLOEXEC)
		1192	const_iv (EFD_NONBLOCK)
		1193	const_iv (EFD_SEMAPHORE)
		1194
		1195	const_iv (CLOCK_REALTIME)
		1196	const_iv (CLOCK_MONOTONIC)
		1197	const_iv (CLOCK_BOOTTIME)
		1198	const_iv (CLOCK_REALTIME_ALARM)
		1199	const_iv (CLOCK_BOOTTIME_ALARM)
		1200
		1201	const_iv (TFD_NONBLOCK)
		1202	const_iv (TFD_CLOEXEC)
		1203
		1204	const_iv (TFD_TIMER_ABSTIME)
		1205	const_iv (TFD_TIMER_CANCEL_ON_SET)
		1206
		1207	/* these are libeio constants, and are independent of gendef0 */
		1208	const_eio (SEEK_SET)
		1209	const_eio (SEEK_CUR)
		1210	const_eio (SEEK_END)
		1211
		1212	const_eio (MCL_FUTURE)
		1213	const_eio (MCL_CURRENT)
		1214
		1215	const_eio (MS_ASYNC)
		1216	const_eio (MS_INVALIDATE)
		1217	const_eio (MS_SYNC)
		1218
		1219	const_eio (MT_MODIFY)
		1220
		1221	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1222	const_eio (SYNC_FILE_RANGE_WRITE)
		1223	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1224
		1225	const_eio (FALLOC_FL_KEEP_SIZE)
		1226	const_eio (FALLOC_FL_PUNCH_HOLE)
		1227	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1228	const_eio (FALLOC_FL_ZERO_RANGE)
		1229	const_eio (FALLOC_FL_INSERT_RANGE)
		1230	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1231
		1232	const_eio (RENAME_NOREPLACE)
		1233	const_eio (RENAME_EXCHANGE)
		1234	const_eio (RENAME_WHITEOUT)
		1235
		1236	const_eio (READDIR_DENTS)
		1237	const_eio (READDIR_DIRS_FIRST)
		1238	const_eio (READDIR_STAT_ORDER)
		1239	const_eio (READDIR_FOUND_UNKNOWN)
		1240
		1241	const_eio (DT_UNKNOWN)
		1242	const_eio (DT_FIFO)
		1243	const_eio (DT_CHR)
		1244	const_eio (DT_DIR)
		1245	const_eio (DT_BLK)
		1246	const_eio (DT_REG)
		1247	const_eio (DT_LNK)
		1248	const_eio (DT_SOCK)
		1249	const_eio (DT_WHT)
		1250	};
		1251
		1252	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1253	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1254	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1255	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1256
		1257	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1258	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1259
		1260	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1261
		1262	reinit ();
		1263	}
		1264
620	void	1265	void
621	min_parallel(nthreads)	1266	reinit ()
622	int nthreads	1267	PROTOTYPE:
		1268
		1269	void
		1270	max_poll_reqs (unsigned int nreqs)
623	PROTOTYPE: $	1271	PROTOTYPE: $
		1272	CODE:
		1273	eio_set_max_poll_reqs (nreqs);
624		1274
625	void	1275	void
626	max_parallel(nthreads)	1276	max_poll_time (double nseconds)
627	int nthreads
628	PROTOTYPE: $	1277	PROTOTYPE: $
629
630	int
631	max_outstanding(nreqs)
632	int nreqs
633	PROTOTYPE: $
634	CODE:	1278	CODE:
635	RETVAL = max_outstanding;	1279	eio_set_max_poll_time (nseconds);
		1280
		1281	void
		1282	min_parallel (unsigned int nthreads)
		1283	PROTOTYPE: $
		1284	CODE:
		1285	eio_set_min_parallel (nthreads);
		1286
		1287	void
		1288	max_parallel (unsigned int nthreads)
		1289	PROTOTYPE: $
		1290	CODE:
		1291	eio_set_max_parallel (nthreads);
		1292
		1293	void
		1294	max_idle (unsigned int nthreads)
		1295	PROTOTYPE: $
		1296	CODE:
		1297	eio_set_max_idle (nthreads);
		1298
		1299	void
		1300	idle_timeout (unsigned int seconds)
		1301	PROTOTYPE: $
		1302	CODE:
		1303	eio_set_idle_timeout (seconds);
		1304
		1305	void
		1306	max_outstanding (unsigned int maxreqs)
		1307	PROTOTYPE: $
		1308	CODE:
636	max_outstanding = nreqs;	1309	max_outstanding = maxreqs;
637		1310
638	void	1311	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1312	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
640	SV * pathname
641	int flags
642	int mode
643	SV * callback
644	PROTOTYPE: $$$;$
645	CODE:	1313	PPCODE:
646	{	1314	{
647	dREQ;	1315	dREQ;
648		1316
		1317	req->type = EIO_WD_OPEN;
		1318	req_set_path1 (req, pathname);
		1319
		1320	REQ_SEND;
		1321	}
		1322
		1323	void
		1324	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1325	PPCODE:
		1326	{
		1327	dREQ;
		1328
649	req->type = REQ_OPEN;	1329	req->type = EIO_OPEN;
650	req->data = newSVsv (pathname);	1330	req_set_path1 (req, pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);
652	req->fd = flags;	1331	req->int1 = flags;
653	req->mode = mode;	1332	req->int2 = mode;
654		1333
655	send_req (req);	1334	REQ_SEND;
656	}	1335	}
657		1336
658	void	1337	void
659	aio_close(fh,callback=&PL_sv_undef)	1338	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
660	SV * fh
661	SV * callback
662	PROTOTYPE: $;$
663	ALIAS:	1339	ALIAS:
664	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	1340	aio_fsync = EIO_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	1341	aio_fdatasync = EIO_FDATASYNC
		1342	aio_syncfs = EIO_SYNCFS
667	CODE:	1343	PPCODE:
668	{	1344	{
		1345	int fd = s_fileno_croak (fh, 0);
669	dREQ;	1346	dREQ;
670		1347
671	req->type = ix;	1348	req->type = ix;
672	req->fh = newSVsv (fh);	1349	req->sv1 = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1350	req->int1 = fd;
674		1351
675	send_req (req);	1352	REQ_SEND;
676	}	1353	}
677		1354
678	void	1355	void
		1356	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1357	PPCODE:
		1358	{
		1359	int fd = s_fileno_croak (fh, 0);
		1360	dREQ;
		1361
		1362	req->type = EIO_SYNC_FILE_RANGE;
		1363	req->sv1 = newSVsv (fh);
		1364	req->int1 = fd;
		1365	req->offs = offset;
		1366	req->size = nbytes;
		1367	req->int2 = flags;
		1368
		1369	REQ_SEND;
		1370	}
		1371
		1372	void
		1373	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1374	PPCODE:
		1375	{
		1376	int fd = s_fileno_croak (fh, 0);
		1377	dREQ;
		1378
		1379	req->type = EIO_FALLOCATE;
		1380	req->sv1 = newSVsv (fh);
		1381	req->int1 = fd;
		1382	req->int2 = mode;
		1383	req->offs = offset;
		1384	req->size = len;
		1385
		1386	REQ_SEND;
		1387	}
		1388
		1389	void
		1390	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1391	PPCODE:
		1392	{
		1393	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1394	int fd = s_fileno_croak (fh, 0);
		1395	dREQ;
		1396
		1397	if (expect_false (close_fd < 0))
		1398	{
		1399	int pipefd [2];
		1400
		1401	if (
		1402	#ifdef _WIN32
		1403	_pipe (pipefd, 1, _O_BINARY) < 0
		1404	#else
		1405	pipe (pipefd) < 0
		1406	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1407	#endif
		1408	|| close (pipefd [1]) < 0
		1409	)
		1410	abort (); /*D*/
		1411
		1412	close_fd = pipefd [0];
		1413	}
		1414
		1415	req->type = EIO_DUP2;
		1416	req->int1 = close_fd;
		1417	req->sv2 = newSVsv (fh);
		1418	req->int2 = fd;
		1419
		1420	REQ_SEND;
		1421	}
		1422
		1423	void
		1424	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1425	PPCODE:
		1426	{
		1427	int fd = s_fileno_croak (fh, 0);
		1428	dREQ;
		1429
		1430	req->type = EIO_SEEK;
		1431	req->sv1 = newSVsv (fh);
		1432	req->int1 = fd;
		1433	req->offs = SvVAL64 (offset);
		1434	req->int2 = whence;
		1435
		1436	REQ_SEND;
		1437	}
		1438
		1439	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1440	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
680	SV * fh
681	UV offset
682	UV length
683	SV * data
684	UV dataoffset
685	SV * callback
686	ALIAS:	1441	ALIAS:
687	aio_read = REQ_READ	1442	aio_read = EIO_READ
688	aio_write = REQ_WRITE	1443	aio_write = EIO_WRITE
689	PROTOTYPE: $$$$$;$
690	CODE:	1444	PPCODE:
691	{	1445	{
692	aio_req req;
693	STRLEN svlen;	1446	STRLEN svlen;
		1447	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
694	char *svptr = SvPVbyte (data, svlen);	1448	char *svptr = SvPVbyte (data, svlen);
695		1449	UV len = SvUV (length);
696	SvUPGRADE (data, SVt_PV);
697	SvPOK_on (data);
698		1450
699	if (dataoffset < 0)	1451	if (dataoffset < 0)
700	dataoffset += svlen;	1452	dataoffset += svlen;
701		1453
702	if (dataoffset < 0 || dataoffset > svlen)	1454	if (dataoffset < 0 || dataoffset > svlen)
703	croak ("data offset outside of string");	1455	croak ("dataoffset outside of data scalar");
704		1456
705	if (ix == REQ_WRITE)	1457	if (ix == EIO_WRITE)
706	{	1458	{
707	/* write: check length and adjust. */	1459	/* write: check length and adjust. */
708	if (length < 0 || length + dataoffset > svlen)	1460	if (!SvOK (length) || len + dataoffset > svlen)
709	length = svlen - dataoffset;	1461	len = svlen - dataoffset;
710	}	1462	}
711	else	1463	else
712	{	1464	{
713	/* read: grow scalar as necessary */	1465	/* read: check type and grow scalar as necessary */
		1466	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
714	svptr = SvGROW (data, length + dataoffset);	1467	svptr = sv_grow (data, len + dataoffset + 1);
		1468	else if (SvCUR (data) < len + dataoffset)
		1469	croak ("length + dataoffset outside of scalar, and cannot grow");
715	}	1470	}
716
717	if (length < 0)
718	croak ("length must not be negative");
719		1471
720	{	1472	{
721	dREQ;	1473	dREQ;
722		1474
723	req->type = ix;	1475	req->type = ix;
724	req->fh = newSVsv (fh);	1476	req->sv1 = newSVsv (fh);
725	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1477	req->int1 = fd;
726	: IoOFP (sv_2io (fh)));	1478	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
727	req->offset = offset;	1479	req->size = len;
728	req->length = length;
729	req->data = SvREFCNT_inc (data);	1480	req->sv2 = SvREFCNT_inc (data);
730	req->dataptr = (char *)svptr + dataoffset;	1481	req->ptr2 = (char *)svptr + dataoffset;
		1482	req->stroffset = dataoffset;
731		1483
732	if (!SvREADONLY (data))	1484	if (!SvREADONLY (data))
733	{	1485	{
734	SvREADONLY_on (data);	1486	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1487	req->flags |= FLAG_SV2_RO_OFF;
736	}	1488	}
737		1489
738	send_req (req);	1490	REQ_SEND;
739	}	1491	}
740	}	1492	}
741		1493
742	void	1494	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1495	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
744	SV * out_fh
745	SV * in_fh
746	UV in_offset
747	UV length
748	SV * callback
749	PROTOTYPE: $$$$;$
750	CODE:
751	{
752	dREQ;
753
754	req->type = REQ_SENDFILE;
755	req->fh = newSVsv (out_fh);
756	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
757	req->fh2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759	req->offset = in_offset;
760	req->length = length;
761
762	send_req (req);
763	}
764
765	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
767	SV * fh
768	UV offset
769	IV length
770	SV * callback
771	PROTOTYPE: $$$;$
772	CODE:
773	{
774	dREQ;
775
776	req->type = REQ_READAHEAD;
777	req->fh = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
779	req->offset = offset;
780	req->length = length;
781
782	send_req (req);
783	}
784
785	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)
787	SV * fh_or_path
788	SV * callback
789	ALIAS:	1496	ALIAS:
790	aio_stat = REQ_STAT	1497	aio_ioctl = EIO_IOCTL
791	aio_lstat = REQ_LSTAT	1498	aio_fcntl = EIO_FCNTL
792	CODE:	1499	PPCODE:
793	{	1500	{
794	dREQ;	1501	int fd = s_fileno_croak (fh, 0);
		1502	char *svptr;
795		1503
796	New (0, req->statdata, 1, Stat_t);	1504	if (SvPOK (arg) || !SvNIOK (arg))
797	if (!req->statdata)
798	{	1505	{
799	free_req (req);	1506	STRLEN svlen;
800	croak ("out of memory during aio_req->statdata allocation");	1507	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
801	}	1508	#ifdef IOCPARM_LEN
		1509	STRLEN need = IOCPARM_LEN (request);
		1510	#else
		1511	STRLEN need = 256;
		1512	#endif
802		1513
803	if (SvPOK (fh_or_path))	1514	if (svlen < need)
804	{	1515	svptr = SvGROW (arg, need);
805	req->type = ix;
806	req->data = newSVsv (fh_or_path);
807	req->dataptr = SvPVbyte_nolen (req->data);
808	}	1516	}
809	else	1517	else
		1518	svptr = (char *)SvIV (arg);
		1519
810	{	1520	{
		1521	dREQ;
		1522
811	req->type = REQ_FSTAT;	1523	req->type = ix;
812	req->fh = newSVsv (fh_or_path);	1524	req->sv1 = newSVsv (fh);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1525	req->int1 = fd;
		1526	req->int2 = (long)request;
		1527	req->sv2 = SvREFCNT_inc (arg);
		1528	req->ptr2 = svptr;
		1529
		1530	REQ_SEND;
814	}	1531	}
815
816	send_req (req);
817	}	1532	}
818		1533
819	void	1534	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1535	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
821	SV * pathname
822	SV * callback
823	ALIAS:	1536	ALIAS:
824	aio_unlink = REQ_UNLINK	1537	aio_readlink = EIO_READLINK
825	aio_rmdir = REQ_RMDIR	1538	aio_realpath = EIO_REALPATH
		1539	PPCODE:
		1540	{
		1541	dREQ;
		1542
		1543	req->type = ix;
		1544	req_set_path1 (req, pathname);
		1545
		1546	REQ_SEND;
		1547	}
		1548
		1549	void
		1550	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1551	PPCODE:
		1552	{
		1553	int ifd = s_fileno_croak (in_fh , 0);
		1554	int ofd = s_fileno_croak (out_fh, 1);
		1555	dREQ;
		1556
		1557	req->type = EIO_SENDFILE;
		1558	req->sv1 = newSVsv (out_fh);
		1559	req->int1 = ofd;
		1560	req->sv2 = newSVsv (in_fh);
		1561	req->int2 = ifd;
		1562	req->offs = in_offset;
		1563	req->size = length;
		1564
		1565	REQ_SEND;
		1566	}
		1567
		1568	void
		1569	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1570	PPCODE:
		1571	{
		1572	int fd = s_fileno_croak (fh, 0);
		1573	dREQ;
		1574
		1575	req->type = EIO_READAHEAD;
		1576	req->sv1 = newSVsv (fh);
		1577	req->int1 = fd;
		1578	req->offs = offset;
		1579	req->size = length;
		1580
		1581	REQ_SEND;
		1582	}
		1583
		1584	void
		1585	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1586	ALIAS:
		1587	aio_stat = EIO_STAT
		1588	aio_lstat = EIO_LSTAT
		1589	aio_statvfs = EIO_STATVFS
		1590	PPCODE:
		1591	{
		1592	dREQ;
		1593
		1594	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1595
		1596	REQ_SEND;
		1597	}
		1598
		1599	UV
		1600	major (UV dev)
		1601	ALIAS:
		1602	minor = 1
826	CODE:	1603	CODE:
		1604	RETVAL = ix ? minor (dev) : major (dev);
		1605	OUTPUT:
		1606	RETVAL
		1607
		1608	UV
		1609	makedev (UV maj, UV min)
		1610	CODE:
		1611	RETVAL = makedev (maj, min);
		1612	OUTPUT:
		1613	RETVAL
		1614
		1615	void
		1616	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1617	PPCODE:
		1618	{
		1619	dREQ;
		1620
		1621	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1622	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1623	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1624
		1625	REQ_SEND;
		1626	}
		1627
		1628	void
		1629	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1630	PPCODE:
		1631	{
		1632	dREQ;
		1633
		1634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1635	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1636
		1637	REQ_SEND;
		1638	}
		1639
		1640	void
		1641	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1642	PPCODE:
		1643	{
		1644	dREQ;
		1645
		1646	req->int2 = mode;
		1647	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1648
		1649	REQ_SEND;
		1650	}
		1651
		1652	void
		1653	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1654	PPCODE:
		1655	{
		1656	dREQ;
		1657
		1658	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1659	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1660	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1661
		1662	REQ_SEND;
		1663	}
		1664
		1665	void
		1666	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1667	PPCODE:
		1668	{
		1669	dREQ;
		1670
		1671	req->type = EIO_READDIR;
		1672	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1673
		1674	if (flags & EIO_READDIR_DENTS)
		1675	req->int1 |= EIO_READDIR_CUSTOM2;
		1676
		1677	req_set_path1 (req, pathname);
		1678
		1679	REQ_SEND;
		1680	}
		1681
		1682	void
		1683	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1684	PPCODE:
		1685	{
		1686	dREQ;
		1687
		1688	req->type = EIO_MKDIR;
		1689	req->int2 = mode;
		1690	req_set_path1 (req, pathname);
		1691
		1692	REQ_SEND;
		1693	}
		1694
		1695	void
		1696	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1697	ALIAS:
		1698	aio_unlink = EIO_UNLINK
		1699	aio_rmdir = EIO_RMDIR
		1700	aio_readdir = EIO_READDIR
		1701	PPCODE:
827	{	1702	{
828	dREQ;	1703	dREQ;
829		1704
830	req->type = ix;	1705	req->type = ix;
831	req->data = newSVsv (pathname);	1706	req_set_path1 (req, pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);
833
834	send_req (req);
835	}
836		1707
		1708	REQ_SEND;
		1709	}
		1710
837	void	1711	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1712	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
839	SV * oldpath	1713	ALIAS:
840	SV * newpath	1714	aio_link = EIO_LINK
841	SV * callback	1715	aio_symlink = EIO_SYMLINK
		1716	aio_rename = EIO_RENAME
842	CODE:	1717	PPCODE:
843	{	1718	{
		1719	eio_wd wd2 = 0;
844	dREQ;	1720	dREQ;
845		1721
846	req->type = REQ_SYMLINK;	1722	req->type = ix;
847	req->fh = newSVsv (oldpath);	1723	req_set_path1 (req, oldpath);
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1724	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
849	req->data = newSVsv (newpath);	1725	req->int3 = (long)wd2;
850	req->dataptr = SvPVbyte_nolen (req->data);
851		1726
852	send_req (req);	1727	REQ_SEND;
853	}	1728	}
854		1729
855	void	1730	void
856	flush()	1731	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
857	PROTOTYPE:	1732	PPCODE:
		1733	{
		1734	eio_wd wd2 = 0;
		1735	dREQ;
		1736
		1737	req->type = EIO_RENAME;
		1738	req_set_path1 (req, oldpath);
		1739	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1740	req->int2 = flags;
		1741	req->int3 = (long)wd2;
		1742
		1743	REQ_SEND;
		1744	}
		1745
		1746	void
		1747	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
		1748	PPCODE:
		1749	{
		1750	dREQ;
		1751
		1752	req->type = EIO_MKNOD;
		1753	req->int2 = (mode_t)mode;
		1754	req->offs = dev;
		1755	req_set_path1 (req, pathname);
		1756
		1757	REQ_SEND;
		1758	}
		1759
		1760	void
		1761	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1762	ALIAS:
		1763	aio_mtouch = EIO_MTOUCH
		1764	aio_msync = EIO_MSYNC
		1765	PPCODE:
		1766	{
		1767	STRLEN svlen;
		1768	char *svptr = SvPVbyte (data, svlen);
		1769	UV len = SvUV (length);
		1770
		1771	if (flags < 0)
		1772	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1773
		1774	if (offset < 0)
		1775	offset += svlen;
		1776
		1777	if (offset < 0 || offset > svlen)
		1778	croak ("offset outside of scalar");
		1779
		1780	if (!SvOK (length) || len + offset > svlen)
		1781	len = svlen - offset;
		1782
		1783	{
		1784	dREQ;
		1785
		1786	req->type = ix;
		1787	req->sv2 = SvREFCNT_inc (data);
		1788	req->ptr2 = (char *)svptr + offset;
		1789	req->size = len;
		1790	req->int1 = flags;
		1791
		1792	REQ_SEND;
		1793	}
		1794	}
		1795
		1796	void
		1797	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1798	PPCODE:
		1799	{
		1800	STRLEN svlen;
		1801	char *svptr = SvPVbyte (data, svlen);
		1802	UV len = SvUV (length);
		1803
		1804	if (offset < 0)
		1805	offset += svlen;
		1806
		1807	if (offset < 0 || offset > svlen)
		1808	croak ("offset outside of scalar");
		1809
		1810	if (!SvOK (length) || len + offset > svlen)
		1811	len = svlen - offset;
		1812
		1813	{
		1814	dREQ;
		1815
		1816	req->type = EIO_MLOCK;
		1817	req->sv2 = SvREFCNT_inc (data);
		1818	req->ptr2 = (char *)svptr + offset;
		1819	req->size = len;
		1820
		1821	REQ_SEND;
		1822	}
		1823	}
		1824
		1825	void
		1826	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1827	PPCODE:
		1828	{
		1829	dREQ;
		1830
		1831	req->type = EIO_MLOCKALL;
		1832	req->int1 = flags;
		1833
		1834	REQ_SEND;
		1835	}
		1836
		1837	void
		1838	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1839	PPCODE:
		1840	{
		1841	int fd = s_fileno_croak (fh, 0);
		1842	dREQ;
		1843
		1844	req->type = EIO_CUSTOM;
		1845	req->sv1 = newSVsv (fh);
		1846	req->int1 = fd;
		1847
		1848	req->feed = fiemap;
		1849	#if HAVE_FIEMAP
		1850	/* keep our fingers crossed that the next two types are 64 bit */
		1851	req->offs = start;
		1852	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1853	req->int2 = flags;
		1854	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1855	#endif
		1856
		1857	REQ_SEND;
		1858	}
		1859
		1860	void
		1861	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
		1862	PPCODE:
		1863	{
		1864	char *svptr = 0;
		1865
		1866	sv_clear_foreign (data);
		1867
		1868	if (length) /* known length, directly read into scalar */
		1869	{
		1870	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1871	svptr = sv_grow (data, length + 1);
		1872	else if (SvCUR (data) < length)
		1873	croak ("length outside of scalar, and cannot grow");
		1874	else
		1875	svptr = SvPVbyte_nolen (data);
		1876	}
		1877
		1878	{
		1879	dREQ;
		1880
		1881	req->type = EIO_SLURP;
		1882	req_set_path1 (req, pathname);
		1883	req->offs = offset;
		1884	req->size = length;
		1885	req->sv2 = SvREFCNT_inc (data);
		1886	req->ptr2 = svptr;
		1887
		1888	if (!SvREADONLY (data))
		1889	{
		1890	SvREADONLY_on (data);
		1891	req->flags |= FLAG_SV2_RO_OFF;
		1892	}
		1893
		1894	REQ_SEND;
		1895	}
		1896	}
		1897
		1898	void
		1899	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1900	PPCODE:
		1901	{
		1902	dREQ;
		1903
		1904	req->type = EIO_BUSY;
		1905	req->nv1 = delay < 0. ? 0. : delay;
		1906
		1907	REQ_SEND;
		1908	}
		1909
		1910	void
		1911	aio_group (SV *callback = &PL_sv_undef)
		1912	PPCODE:
		1913	{
		1914	dREQ;
		1915
		1916	req->type = EIO_GROUP;
		1917
		1918	PUTBACK;
		1919	req_submit (req);
		1920	SPAGAIN;
		1921
		1922	XPUSHs (req_sv (req, aio_grp_stash));
		1923	}
		1924
		1925	void
		1926	aio_nop (SV *callback = &PL_sv_undef)
		1927	ALIAS:
		1928	aio_nop = EIO_NOP
		1929	aio_sync = EIO_SYNC
		1930	PPCODE:
		1931	{
		1932	dREQ;
		1933
		1934	req->type = ix;
		1935
		1936	REQ_SEND;
		1937	}
		1938
		1939	int
		1940	aioreq_pri (int pri = NO_INIT)
858	CODE:	1941	CODE:
		1942	RETVAL = next_pri;
		1943	if (items > 0)
		1944	{
		1945	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1946	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1947	next_pri = pri;
		1948	}
		1949	OUTPUT:
		1950	RETVAL
		1951
		1952	void
		1953	aioreq_nice (int nice = 0)
		1954	CODE:
		1955	nice = next_pri - nice;
		1956	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1957	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1958	next_pri = nice;
		1959
		1960	void
		1961	flush ()
		1962	CODE:
859	while (nreqs)	1963	while (eio_nreqs ())
860	{	1964	{
861	poll_wait ();	1965	poll_wait ();
862	poll_cb ();	1966	poll_cb ();
863	}	1967	}
864		1968
865	void	1969	int
866	poll()	1970	poll ()
867	PROTOTYPE:
868	CODE:	1971	CODE:
869	if (nreqs)
870	{
871	poll_wait ();	1972	poll_wait ();
872	poll_cb ();	1973	RETVAL = poll_cb ();
873	}
874
875	int
876	poll_fileno()
877	PROTOTYPE:
878	CODE:
879	RETVAL = respipe [0];
880	OUTPUT:	1974	OUTPUT:
881	RETVAL	1975	RETVAL
882		1976
883	int	1977	int
		1978	poll_fileno ()
		1979	CODE:
		1980	RETVAL = s_epipe_fd (&respipe);
		1981	OUTPUT:
		1982	RETVAL
		1983
		1984	int
884	poll_cb(...)	1985	poll_cb (...)
885	PROTOTYPE:	1986	PROTOTYPE:
886	CODE:	1987	CODE:
887	RETVAL = poll_cb ();	1988	RETVAL = poll_cb ();
888	OUTPUT:	1989	OUTPUT:
889	RETVAL	1990	RETVAL
890		1991
891	void	1992	void
892	poll_wait()	1993	poll_wait ()
893	PROTOTYPE:
894	CODE:	1994	CODE:
895	if (nreqs)
896	poll_wait ();	1995	poll_wait ();
897		1996
898	int	1997	int
899	nreqs()	1998	nreqs ()
900	PROTOTYPE:
901	CODE:	1999	CODE:
902	RETVAL = nreqs;	2000	RETVAL = eio_nreqs ();
903	OUTPUT:	2001	OUTPUT:
904	RETVAL	2002	RETVAL
905		2003
		2004	int
		2005	nready ()
		2006	CODE:
		2007	RETVAL = eio_nready ();
		2008	OUTPUT:
		2009	RETVAL
		2010
		2011	int
		2012	npending ()
		2013	CODE:
		2014	RETVAL = eio_npending ();
		2015	OUTPUT:
		2016	RETVAL
		2017
		2018	int
		2019	nthreads ()
		2020	CODE:
		2021	RETVAL = eio_nthreads ();
		2022	OUTPUT:
		2023	RETVAL
		2024
		2025	int
		2026	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		2027	CODE:
		2028	RETVAL = posix_fadvise (fh, offset, length, advice);
		2029	OUTPUT:
		2030	RETVAL
		2031
		2032	IV
		2033	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		2034	CODE:
		2035	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		2036	OUTPUT:
		2037	RETVAL
		2038
		2039	void
		2040	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		2041	PPCODE:
		2042	sv_clear_foreign (scalar);
		2043	{
		2044	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		2045	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		2046	if (addr == (void *)-1)
		2047	XSRETURN_NO;
		2048
		2049	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2050
		2051	if (!(prot & PROT_WRITE))
		2052	SvREADONLY_on (scalar);
		2053
		2054	XSRETURN_YES;
		2055	}
		2056
		2057	void
		2058	munmap (SV *scalar)
		2059	CODE:
		2060	sv_clear_foreign (scalar);
		2061
		2062	int
		2063	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2064	ALIAS:
		2065	mprotect = 1
		2066	CODE:
		2067	{
		2068	STRLEN svlen;
		2069	void *addr = SvPVbyte (scalar, svlen);
		2070	STRLEN len = SvUV (length);
		2071
		2072	if (offset < 0)
		2073	offset += svlen;
		2074
		2075	if (offset < 0 || offset > svlen)
		2076	croak ("offset outside of scalar");
		2077
		2078	if (!SvOK (length) || len + offset > svlen)
		2079	len = svlen - offset;
		2080
		2081	addr = (void *)(((intptr_t)addr) + offset);
		2082	eio_page_align (&addr, &len);
		2083
		2084	switch (ix)
		2085	{
		2086	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2087	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2088	}
		2089	}
		2090	OUTPUT:
		2091	RETVAL
		2092
		2093	int
		2094	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		2095	CODE:
		2096	{
		2097	STRLEN svlen;
		2098	void *addr = SvPVbyte (scalar, svlen);
		2099	size_t len = SvUV (length);
		2100
		2101	if (offset < 0)
		2102	offset += svlen;
		2103
		2104	if (offset < 0 || offset > svlen)
		2105	croak ("offset outside of scalar");
		2106
		2107	if (!SvOK (length) || len + offset > svlen)
		2108	len = svlen - offset;
		2109
		2110	addr = (void *)(((intptr_t)addr) + offset);
		2111	eio_page_align (&addr, &len);
		2112	#if _POSIX_MEMLOCK_RANGE
		2113	RETVAL = munlock (addr, len);
		2114	#else
		2115	RETVAL = EIO_ENOSYS ();
		2116	#endif
		2117	}
		2118	OUTPUT:
		2119	RETVAL
		2120
		2121	int
		2122	munlockall ()
		2123	CODE:
		2124	#if _POSIX_MEMLOCK
		2125	munlockall ();
		2126	#else
		2127	RETVAL = EIO_ENOSYS ();
		2128	#endif
		2129	OUTPUT:
		2130	RETVAL
		2131
		2132	int
		2133	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2134	CODE:
		2135	{
		2136	#if HAVE_LINUX_SPLICE
		2137	loff_t off_in_, off_out_;
		2138	RETVAL = splice (
		2139	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2140	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2141	length, flags
		2142	);
		2143	#else
		2144	RETVAL = EIO_ENOSYS ();
		2145	#endif
		2146	}
		2147	OUTPUT:
		2148	RETVAL
		2149
		2150	int
		2151	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2152	CODE:
		2153	#if HAVE_LINUX_SPLICE
		2154	RETVAL = tee (rfh, wfh, length, flags);
		2155	#else
		2156	RETVAL = EIO_ENOSYS ();
		2157	#endif
		2158	OUTPUT:
		2159	RETVAL
		2160
		2161	int
		2162	pipesize (aio_rfd rfh, int new_size = -1)
		2163	PROTOTYPE: $;$
		2164	CODE:
		2165	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2166	if (new_size >= 0)
		2167	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2168	else
		2169	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2170	#else
		2171	errno = ENOSYS;
		2172	RETVAL = -1;
		2173	#endif
		2174	OUTPUT:
		2175	RETVAL
		2176
		2177	void
		2178	pipe2 (int flags = 0)
		2179	PROTOTYPE: ;$
		2180	PPCODE:
		2181	{
		2182	int fd[2];
		2183	int res;
		2184
		2185	if (flags)
		2186	#if HAVE_PIPE2
		2187	res = pipe2 (fd, flags);
		2188	#else
		2189	res = (errno = ENOSYS, -1);
		2190	#endif
		2191	else
		2192	res = pipe (fd);
		2193
		2194	if (!res)
		2195	{
		2196	EXTEND (SP, 2);
		2197	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2198	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2199	}
		2200	}
		2201
		2202	void
		2203	eventfd (unsigned int initval = 0, int flags = 0)
		2204	PPCODE:
		2205	{
		2206	int fd;
		2207	#if HAVE_EVENTFD
		2208	fd = eventfd (initval, flags);
		2209	#else
		2210	fd = (errno = ENOSYS, -1);
		2211	#endif
		2212
		2213	XPUSHs (newmortalFH (fd, O_RDWR));
		2214	}
		2215
		2216	void
		2217	timerfd_create (int clockid, int flags = 0)
		2218	PPCODE:
		2219	{
		2220	int fd;
		2221	#if HAVE_TIMERFD
		2222	fd = timerfd_create (clockid, flags);
		2223	#else
		2224	fd = (errno = ENOSYS, -1);
		2225	#endif
		2226
		2227	XPUSHs (newmortalFH (fd, O_RDWR));
		2228	}
		2229
		2230	void
		2231	timerfd_settime (SV *fh, int flags, NV interval, NV value)
		2232	PPCODE:
		2233	{
		2234	int fd = s_fileno_croak (fh, 0);
		2235	int res;
		2236	struct itimerspec its, ots;
		2237
		2238	ts_set (&its.it_interval, interval);
		2239	ts_set (&its.it_value , value);
		2240	#if HAVE_TIMERFD
		2241	res = timerfd_settime (fd, flags, &its, &ots);
		2242	#else
		2243	res = (errno = ENOSYS, -1);
		2244	#endif
		2245
		2246	if (!res)
		2247	{
		2248	EXTEND (SP, 2);
		2249	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2250	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2251	}
		2252	}
		2253
		2254	void
		2255	timerfd_gettime (SV *fh)
		2256	PPCODE:
		2257	{
		2258	int fd = s_fileno_croak (fh, 0);
		2259	int res;
		2260	struct itimerspec ots;
		2261	#if HAVE_TIMERFD
		2262	res = timerfd_gettime (fd, &ots);
		2263	#else
		2264	res = (errno = ENOSYS, -1);
		2265	#endif
		2266
		2267	if (!res)
		2268	{
		2269	EXTEND (SP, 2);
		2270	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2271	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2272	}
		2273	}
		2274
		2275	UV
		2276	get_fdlimit ()
		2277	CODE:
		2278	#if HAVE_RLIMITS
		2279	struct rlimit rl;
		2280	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2281	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2282	#endif
		2283	XSRETURN_UNDEF;
		2284	OUTPUT:
		2285	RETVAL
		2286
		2287	void
		2288	min_fdlimit (UV limit = 0x7fffffffU)
		2289	CODE:
		2290	{
		2291	#if HAVE_RLIMITS
		2292	struct rlimit rl;
		2293	rlim_t orig_rlim_max;
		2294	UV bit;
		2295
		2296	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2297	goto fail;
		2298
		2299	if (rl.rlim_cur == RLIM_INFINITY)
		2300	XSRETURN_YES;
		2301
		2302	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2303
		2304	if (rl.rlim_cur < limit)
		2305	{
		2306	rl.rlim_cur = limit;
		2307
		2308	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2309	rl.rlim_max = rl.rlim_cur;
		2310	}
		2311
		2312	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2313	XSRETURN_YES;
		2314
		2315	if (errno == EPERM)
		2316	{
		2317	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2318	/* our limit overflows a system-wide limit */
		2319	/* try an adaptive algorithm, but do not lower the hardlimit */
		2320	rl.rlim_max = 0;
		2321	for (bit = 0x40000000U; bit; bit >>= 1)
		2322	{
		2323	rl.rlim_max |= bit;
		2324	rl.rlim_cur = rl.rlim_max;
		2325
		2326	/* nevr decrease the hard limit */
		2327	if (rl.rlim_max < orig_rlim_max)
		2328	break;
		2329
		2330	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2331	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2332	}
		2333
		2334	/* now, raise the soft limit to the max permitted */
		2335	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2336	{
		2337	rl.rlim_cur = rl.rlim_max;
		2338	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2339	errno = EPERM;
		2340	}
		2341	}
		2342	#endif
		2343	fail:
		2344	XSRETURN_UNDEF;
		2345	}
		2346
		2347	void _on_next_submit (SV *cb)
		2348	CODE:
		2349	SvREFCNT_dec (on_next_submit);
		2350	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2351
		2352	PROTOTYPES: DISABLE
		2353
		2354	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2355
		2356	BOOT:
		2357	{
		2358	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2359	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2360	}
		2361
		2362	void
		2363	DESTROY (SV *self)
		2364	CODE:
		2365	{
		2366	aio_wd wd = SvAIO_WD (self);
		2367	#if HAVE_AT
		2368	{
		2369	SV *callback = &PL_sv_undef;
		2370	dREQ; /* clobbers next_pri :/ */
		2371	next_pri = req->pri; /* restore next_pri */
		2372	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2373	req->type = EIO_WD_CLOSE;
		2374	req->wd = wd;
		2375	REQ_SEND;
		2376	}
		2377	#else
		2378	eio_wd_close_sync (wd);
		2379	#endif
		2380	}
		2381
		2382	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2383
		2384	void
		2385	cancel (aio_req_ornot req)
		2386	CODE:
		2387	eio_cancel (req);
		2388
		2389	void
		2390	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2391	PPCODE:
		2392	{
		2393	if (GIMME_V != G_VOID)
		2394	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2395
		2396	if (items > 1)
		2397	{
		2398	SV *cb_cv = get_cb (callback);
		2399
		2400	SvREFCNT_dec (req->callback);
		2401	req->callback = SvREFCNT_inc (cb_cv);
		2402	}
		2403	}
		2404
		2405	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2406
		2407	void
		2408	add (aio_req grp, ...)
		2409	PPCODE:
		2410	{
		2411	int i;
		2412
		2413	if (grp->int1 == 2)
		2414	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2415
		2416	for (i = 1; i < items; ++i )
		2417	{
		2418	aio_req req;
		2419
		2420	if (GIMME_V != G_VOID)
		2421	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2422
		2423	req = SvAIO_REQ (ST (i));
		2424
		2425	if (req)
		2426	eio_grp_add (grp, req);
		2427	}
		2428	}
		2429
		2430	void
		2431	cancel_subs (aio_req_ornot req)
		2432	CODE:
		2433	req_cancel_subs (req);
		2434
		2435	void
		2436	result (aio_req grp, ...)
		2437	CODE:
		2438	{
		2439	int i;
		2440	AV *av;
		2441
		2442	grp->errorno = errno;
		2443
		2444	av = newAV ();
		2445	av_extend (av, items - 1);
		2446
		2447	for (i = 1; i < items; ++i )
		2448	av_push (av, newSVsv (ST (i)));
		2449
		2450	SvREFCNT_dec (grp->sv1);
		2451	grp->sv1 = (SV *)av;
		2452	}
		2453
		2454	void
		2455	errno (aio_req grp, int errorno = errno)
		2456	CODE:
		2457	grp->errorno = errorno;
		2458
		2459	void
		2460	limit (aio_req grp, int limit)
		2461	CODE:
		2462	eio_grp_limit (grp, limit);
		2463
		2464	void
		2465	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2466	CODE:
		2467	{
		2468	SvREFCNT_dec (grp->sv2);
		2469	grp->sv2 = newSVsv (callback);
		2470	grp->feed = aio_grp_feed;
		2471
		2472	if (grp->int2 <= 0)
		2473	grp->int2 = 2;
		2474
		2475	eio_grp_limit (grp, grp->int2);
		2476	}
		2477

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