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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.66 by root, Tue Oct 24 00:34:47 2006 UTC vs.
Revision 1.252 by root, Sat Jan 6 02:11:10 2018 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "schmorp.h"
14
15	#include <pthread.h>
16		10
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	14	#include <sys/types.h>
22	#include <sys/stat.h>	15	#include <sys/stat.h>
23	#include <limits.h>	16	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	17	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	18	#include <sched.h>
28		19
29	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
30	# if __linux
31	# include <sys/sendfile.h>
32	# elif __freebsd
33	# include <sys/socket.h>
34	# include <sys/uio.h>	21	# include <sys/mman.h>
35	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
		37
		38	/* perl namespace pollution */
		39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
		84	#else
		85
36	# include <sys/socket.h>	86	#include <sys/time.h>
37	# elif __solaris /* not yet */
38	# include <sys/sendfile.h>	87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	#include "libeio/config.h"
		110
		111	#if HAVE_RLIMITS
		112	#include <sys/time.h>
		113	#include <sys/resource.h>
		114	#endif
		115
		116	typedef SV SV8; /* byte-sv, used for argument-checking */
		117	typedef int aio_rfd; /* read file desriptor */
		118	typedef int aio_wfd; /* write file descriptor */
		119
		120	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		121
		122	#define EIO_REQ_MEMBERS \
		123	SV *callback; \
		124	SV *sv1, *sv2; \
		125	SV *sv3, *sv4; \
		126	STRLEN stroffset; \
		127	SV *self;
		128
		129	#define EIO_NO_WRAPPERS 1
		130
		131	#include "libeio/eio.h"
		132
		133	static int req_invoke (eio_req *req);
		134	#define EIO_FINISH(req) req_invoke (req)
		135	static void req_destroy (eio_req *grp);
		136	#define EIO_DESTROY(req) req_destroy (req)
		137
		138	#include "libeio/eio.c"
		139
		140	#if !HAVE_POSIX_FADVISE
		141	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		142	#endif
		143
		144	#if !HAVE_POSIX_MADVISE
		145	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#ifndef MAP_ANONYMOUS
		149	# ifdef MAP_ANON
		150	# define MAP_ANONYMOUS MAP_ANON
39	# else	151	# else
40	# error sendfile support requested but not available	152	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
41	# endif	153	# endif
42	#endif	154	#endif
43		155
44	/* used for struct dirent, AIX doesn't provide it */	156	/* defines all sorts of constants to 0 unless they are already defined */
45	#ifndef NAME_MAX	157	/* also provides const_iv_ and const_niv_ macros for them */
46	# define NAME_MAX 4096	158	#include "def0.h"
47	#endif
48		159
49	#if __ia64	160	#ifndef makedev
50	# define STACKSIZE 65536	161	# define makedev(maj,min) (((maj) << 8) | (min))
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	162	#endif
52	# define STACKSIZE PTHREAD_STACK_MIN	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
53	#else	358	#else
54	# define STACKSIZE 16384	359	errno = ENOSYS;
55	#endif	360	#endif
		361	}
56		362
57	/* buffer size for various temporary buffers */	363	/*****************************************************************************/
58	#define AIO_BUFSIZE 65536
59
60	#define dBUF \
61	char *aio_buf = malloc (AIO_BUFSIZE); \
62	if (!aio_buf) \
63	return -1;
64
65	#define fBUF free (aio_buf)
66		364
67	enum {	365	enum {
68	REQ_QUIT,	366	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
69	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,
79	};	367	};
80		368
81	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"
83
84	typedef struct aio_cb
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;
89	SV *fh, *fh2;
90	void *dataptr, *data2ptr;
91	Stat_t *statdata;
92	off_t offset;
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;
97	int type;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101
102	unsigned char flags;
103	unsigned char pri;
104
105	SV *self; /* the perl counterpart of this request, if any */
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
107	} aio_cb;
108
109	enum {
110	FLAG_CANCELLED = 0x01,
111	};
112
113	typedef aio_cb *aio_req;	369	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	370	typedef eio_req *aio_req_ornot;
		371	typedef eio_wd aio_wd;
115		372
116	enum {	373	static SV *on_next_submit;
117	PRI_MIN = -4,	374	static int next_pri = EIO_PRI_DEFAULT;
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	};
123
124	static int next_pri = DEFAULT_PRI + PRI_BIAS;
125
126	static int started, wanted;
127	static volatile int nreqs;
128	static int max_outstanding = 1<<30;	375	static int max_outstanding;
129	static int respipe [2];
130		376
131	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	377	static s_epipe respipe;
132	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
133	#else
134	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
135	#endif
136		378
137	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	379	static void req_destroy (aio_req req);
138	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
139	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
140
141	static volatile aio_req reqs, reqe; /* queue start, queue end */
142	static volatile aio_req ress, rese; /* queue start, queue end */
143
144	static void req_invoke (aio_req req);	380	static void req_cancel (aio_req req);
145	static void req_free (aio_req req);	381
		382	static void
		383	want_poll (void)
		384	{
		385	/* write a dummy byte to the pipe so fh becomes ready */
		386	s_epipe_signal (&respipe);
		387	}
		388
		389	static void
		390	done_poll (void)
		391	{
		392	/* read any signals sent by the worker threads */
		393	s_epipe_drain (&respipe);
		394	}
146		395
147	/* must be called at most once */	396	/* must be called at most once */
148	static SV *req_sv (aio_req req, const char *klass)	397	static SV *
		398	req_sv (aio_req req, HV *stash)
149	{	399	{
150	if (!req->self)	400	if (!req->self)
151	{	401	{
152	req->self = (SV *)newHV ();	402	req->self = (SV *)newHV ();
153	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	403	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
154	}	404	}
155		405
156	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	406	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
157	}	407	}
158		408
159	static aio_req SvAIO_REQ (SV *sv)	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)
160	{	417	{
161	MAGIC *mg;	418	MAGIC *mg;
162		419
163	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	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")))
164	croak ("object of class " AIO_REQ_KLASS " expected");	425	croak ("object of class IO::AIO::REQ expected");
165		426
166	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	427	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
167		428
168	return mg ? (aio_req)mg->mg_ptr : 0;	429	return mg ? (aio_req)mg->mg_ptr : 0;
169	}	430	}
170		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
171	static void aio_grp_feed (aio_req grp)	469	aio_grp_feed (aio_req grp)
172	{	470	{
173	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	471	if (grp->sv2 && SvOK (grp->sv2))
174	{	472	{
175	int old_len = grp->length;	473	dSP;
176		474
177	if (grp->fh2 && SvOK (grp->fh2))	475	ENTER;
		476	SAVETMPS;
		477	PUSHMARK (SP);
		478	XPUSHs (req_sv (grp, aio_grp_stash));
		479	PUTBACK;
		480	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		481	SPAGAIN;
		482	FREETMPS;
		483	LEAVE;
		484	}
		485	}
		486
		487	static void
		488	req_submit (eio_req *req)
		489	{
		490	eio_submit (req);
		491
		492	if (expect_false (on_next_submit))
		493	{
		494	dSP;
		495	SV *cb = sv_2mortal (on_next_submit);
		496
		497	on_next_submit = 0;
		498
		499	PUSHMARK (SP);
		500	PUTBACK;
		501	call_sv (cb, G_DISCARD | G_EVAL);
		502	}
		503	}
		504
		505	static int
		506	req_invoke (eio_req *req)
		507	{
		508	if (req->flags & FLAG_SV2_RO_OFF)
		509	SvREADONLY_off (req->sv2);
		510
		511	if (!EIO_CANCELLED (req) && req->callback)
		512	{
		513	dSP;
		514	static SV *sv_result_cache; /* caches the result integer SV */
		515	SV *sv_result;
		516
		517	ENTER;
		518	SAVETMPS;
		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))
178	{	524	{
179	dSP;	525	sv_result = sv_result_cache; sv_result_cache = 0;
180		526	SvIV_set (sv_result, req->result);
181	ENTER;	527	SvIOK_only (sv_result);
182	SAVETMPS;
183	PUSHMARK (SP);
184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
185	PUTBACK;
186	call_sv (grp->fh2, G_VOID | G_EVAL);
187	SPAGAIN;
188	FREETMPS;
189	LEAVE;
190	}	528	}
191		529	else
192	/* stop if no progress has been made */
193	if (old_len == grp->length)
194	{	530	{
195	SvREFCNT_dec (grp->fh2);	531	sv_result = newSViv (req->result);
196	grp->fh2 = 0;	532	SvREADONLY_on (sv_result);
197	break;
198	}	533	}
		534
		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;
199	}	782	}
200	}
201		783
202	static void aio_grp_dec (aio_req grp)	784	return !!SvTRUE (ERRSV);
203	{
204	--grp->length;
205
206	/* call feeder, if applicable */
207	aio_grp_feed (grp);
208
209	/* finish, if done */
210	if (!grp->length && grp->fd)
211	{
212	req_invoke (grp);
213	req_free (grp);
214	}
215	}	785	}
216		786
217	static void poll_wait ()	787	static void
		788	req_destroy (aio_req req)
218	{	789	{
219	fd_set rfd;
220
221	while (nreqs)
222	{
223	aio_req req;
224	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
225	pthread_mutex_lock (&reslock);
226	#endif
227	req = ress;
228	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
229	pthread_mutex_unlock (&reslock);
230	#endif
231
232	if (req)
233	return;
234
235	FD_ZERO(&rfd);
236	FD_SET(respipe [0], &rfd);
237
238	select (respipe [0] + 1, &rfd, 0, 0, 0);
239	}
240	}
241
242	static void req_invoke (aio_req req)
243	{
244	dSP;
245	int errorno = errno;
246
247	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
248	return;
249
250	errno = req->errorno;
251
252	ENTER;
253	SAVETMPS;
254	PUSHMARK (SP);
255	EXTEND (SP, 1);
256
257	switch (req->type)
258	{
259	case REQ_READDIR:
260	{
261	SV *rv = &PL_sv_undef;
262
263	if (req->result >= 0)
264	{
265	char *buf = req->data2ptr;
266	AV *av = newAV ();
267
268	while (req->result)
269	{
270	SV *sv = newSVpv (buf, 0);
271
272	av_push (av, sv);
273	buf += SvCUR (sv) + 1;
274	req->result--;
275	}
276
277	rv = sv_2mortal (newRV_noinc ((SV *)av));
278	}
279
280	PUSHs (rv);
281	}
282	break;
283
284	case REQ_OPEN:
285	{
286	/* convert fd to fh */
287	SV *fh;
288
289	PUSHs (sv_2mortal (newSViv (req->result)));
290	PUTBACK;
291	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
292	SPAGAIN;
293
294	fh = SvREFCNT_inc (POPs);
295
296	PUSHMARK (SP);
297	XPUSHs (sv_2mortal (fh));
298	}
299	break;
300
301	case REQ_GROUP:
302	req->fd = 2; /* mark group as finished */
303
304	if (req->data)
305	{
306	int i;
307	AV *av = (AV *)req->data;
308
309	EXTEND (SP, AvFILL (av) + 1);
310	for (i = 0; i <= AvFILL (av); ++i)
311	PUSHs (*av_fetch (av, i, 0));
312	}
313	break;
314
315	case REQ_NOP:
316	case REQ_SLEEP:
317	break;
318
319	default:
320	PUSHs (sv_2mortal (newSViv (req->result)));
321	break;
322	}
323
324
325	PUTBACK;
326	call_sv (req->callback, G_VOID | G_EVAL);
327	SPAGAIN;
328
329	FREETMPS;
330	LEAVE;
331
332	errno = errorno;
333
334	if (SvTRUE (ERRSV))
335	{
336	req_free (req);
337	croak (0);
338	}
339	}
340
341	static void req_free (aio_req req)
342	{
343	if (req->grp)
344	{
345	aio_req grp = req->grp;
346
347	/* unlink request */
348	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
349	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
350
351	if (grp->grp_first == req)
352	grp->grp_first = req->grp_next;
353
354	aio_grp_dec (grp);
355	}
356
357	if (req->self)	790	if (req->self)
358	{	791	{
359	sv_unmagic (req->self, PERL_MAGIC_ext);	792	sv_unmagic (req->self, PERL_MAGIC_ext);
360	SvREFCNT_dec (req->self);	793	SvREFCNT_dec (req->self);
361	}	794	}
362		795
363	SvREFCNT_dec (req->data);
364	SvREFCNT_dec (req->fh);	796	SvREFCNT_dec (req->sv1);
365	SvREFCNT_dec (req->fh2);	797	SvREFCNT_dec (req->sv2);
		798	SvREFCNT_dec (req->sv3);
		799	SvREFCNT_dec (req->sv4);
366	SvREFCNT_dec (req->callback);	800	SvREFCNT_dec (req->callback);
367	Safefree (req->statdata);
368		801
369	if (req->type == REQ_READDIR && req->result >= 0)
370	free (req->data2ptr);
371
372	Safefree (req);	802	free (req);
373	}	803	}
374		804
375	static void req_cancel (aio_req req)	805	static void
		806	req_cancel_subs (aio_req grp)
376	{	807	{
377	req->flags |= FLAG_CANCELLED;
378
379	if (req->type == REQ_GROUP)	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 ())
380	{	828	{
381	aio_req sub;	829	int size;
382		830
383	for (sub = req->grp_first; sub; sub = sub->grp_next)	831	X_LOCK (EIO_POOL->reslock);
384	req_cancel (sub);	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);
385	}	841	}
386	}	842	}
387		843
388	static int poll_cb ()	844	static int
		845	poll_cb (void)
389	{	846	{
390	dSP;
391	int count = 0;
392	int do_croak = 0;
393	aio_req req;
394
395	for (;;)	847	for (;;)
396	{	848	{
397	pthread_mutex_lock (&reslock);	849	int res = eio_poll ();
398	req = ress;
399		850
400	if (req)	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
		896	return req;
		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)
401	{	919	{
402	ress = req->next;	920	path = AvARRAY (rv)[1];
		921	wdob = AvARRAY (rv)[0];
403		922
404	if (!ress)	923	if (SvOK (wdob))
405	{	924	{
406	/* read any signals sent by the worker threads */	925	*wd = SvAIO_WD (wdob);
407	char buf [32];	926	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
408	while (read (respipe [0], buf, 32) == 32)
409	;
410
411	rese = 0;
412	}	927	}
		928	else
		929	*wd = EIO_INVALID_WD;
413	}	930	}
414		931	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
415	pthread_mutex_unlock (&reslock);
416
417	if (!req)
418	break;
419
420	--nreqs;
421
422	if (req->type == REQ_QUIT)
423	started--;
424	else if (req->type == REQ_GROUP && req->length)
425	{	932	{
426	req->fd = 1; /* mark request as delayed */	933	*wd = (aio_wd)(long)SvIVX (rv);
427	continue;	934	*wdsv = SvREFCNT_inc_NN (rv);
		935	*ptr = ".";
		936	return; /* path set to "." */
428	}	937	}
429	else	938	else
430	{	939	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
431	if (req->type == REQ_READ)
432	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
433
434	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
435	SvREADONLY_off (req->data);
436
437	if (req->statdata)
438	{
439	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
440	PL_laststatval = req->result;
441	PL_statcache = *(req->statdata);
442	}
443
444	req_invoke (req);
445
446	count++;
447	}
448
449	req_free (req);
450	}	940	}
451		941
452	return count;	942	*pathsv = newSVsv (path);
		943	*ptr = SvPVbyte_nolen (*pathsv);
453	}	944	}
454		945
455	static void *aio_proc(void *arg);	946	static void ecb_noinline
456		947	req_set_path1 (aio_req req, SV *path)
457	static void start_thread (void)
458	{	948	{
459	sigset_t fullsigset, oldsigset;	949	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
460	pthread_t tid;
461	pthread_attr_t attr;
462
463	pthread_attr_init (&attr);
464	pthread_attr_setstacksize (&attr, STACKSIZE);
465	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
466
467	sigfillset (&fullsigset);
468	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
469
470	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
471	started++;
472
473	sigprocmask (SIG_SETMASK, &oldsigset, 0);
474	}	950	}
475		951
476	static void req_send (aio_req req)	952	static void ecb_noinline
		953	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
477	{	954	{
478	while (started < wanted && nreqs >= started)	955	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
479	start_thread ();
480		956
481	++nreqs;	957	switch (SvTYPE (rv))
482
483	pthread_mutex_lock (&reqlock);
484
485	req->next = 0;
486
487	if (reqe)
488	{	958	{
489	reqe->next = req;	959	case SVt_PVIO:
490	reqe = req;	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;
491	}	971	}
492	else
493	reqe = reqs = req;
494
495	pthread_cond_signal (&reqwait);
496	pthread_mutex_unlock (&reqlock);
497
498	if (nreqs > max_outstanding)
499	for (;;)
500	{
501	poll_cb ();
502
503	if (nreqs <= max_outstanding)
504	break;
505
506	poll_wait ();
507	}
508	}	972	}
509		973
510	static void end_thread (void)	974	XS(boot_IO__AIO) ecb_cold;
511	{
512	aio_req req;
513	Newz (0, req, 1, aio_cb);
514	req->type = REQ_QUIT;
515		975
516	req_send (req);	976	MODULE = IO::AIO PACKAGE = IO::AIO
517	}
518		977
519	static void min_parallel (int nthreads)	978	PROTOTYPES: ENABLE
520	{
521	if (wanted < nthreads)
522	wanted = nthreads;
523	}
524		979
525	static void max_parallel (int nthreads)	980	BOOT:
526	{	981	{
527	int cur = started;	982	static const struct {
		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 },
528		989
529	if (wanted > nthreads)	990	/* you have to re-run ./gendef0 after adding/removing any constants here */
530	wanted = nthreads;	991	/* the first block can be undef if missing */
		992	const_iv (ENOSYS)
		993	const_iv (EXDEV)
		994	const_iv (EBADR)
531		995
532	while (cur > wanted)	996	/* for lseek */
533	{	997	const_iv (SEEK_DATA)
534	end_thread ();	998	const_iv (SEEK_HOLE)
535	cur--;
536	}
537		999
538	while (started > wanted)	1000	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
539	{	1001	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
540	poll_wait ();	1002	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
541	poll_cb ();	1003	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
542	}	1004	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
543	}	1005	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
544		1006
545	static void create_pipe ()	1007	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
546	{	1008	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
547	if (pipe (respipe))	1009	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
548	croak ("unable to initialize result pipe");	1010	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1011	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
549		1012
550	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1013	/* the second block will be 0 when missing */
551	croak ("cannot set result pipe to nonblocking mode");	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)
552		1021
553	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1022	const_iv (O_ASYNC)
554	croak ("cannot set result pipe to nonblocking mode");	1023	const_iv (O_DIRECT)
555	}	1024	const_iv (O_NOATIME)
556		1025
557	/*****************************************************************************/	1026	const_iv (O_CLOEXEC)
558	/* work around various missing functions */	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)
559		1039
560	#if !HAVE_PREADWRITE	1040	const_iv (S_IFIFO)
561	# define pread aio_pread	1041	const_iv (S_IFCHR)
562	# define pwrite aio_pwrite	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)
563		1049
564	/*	1050	const_iv (ST_RDONLY)
565	* make our pread/pwrite safe against themselves, but not against	1051	const_iv (ST_NOSUID)
566	* normal read/write by using a mutex. slows down execution a lot,	1052	const_iv (ST_NODEV)
567	* but that's your problem, not mine.	1053	const_iv (ST_NOEXEC)
568	*/	1054	const_iv (ST_SYNCHRONOUS)
569	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	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)
570		1062
571	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1063	const_iv (PROT_NONE)
572	{	1064	const_iv (PROT_EXEC)
573	ssize_t res;	1065	const_iv (PROT_READ)
574	off_t ooffset;	1066	const_iv (PROT_WRITE)
575		1067
576	pthread_mutex_lock (&preadwritelock);	1068	const_iv (MAP_PRIVATE)
577	ooffset = lseek (fd, 0, SEEK_CUR);	1069	const_iv (MAP_SHARED)
578	lseek (fd, offset, SEEK_SET);	1070	const_iv (MAP_FIXED)
579	res = read (fd, buf, count);	1071	const_iv (MAP_ANONYMOUS)
580	lseek (fd, ooffset, SEEK_SET);
581	pthread_mutex_unlock (&preadwritelock);
582		1072
583	return res;	1073	/* linuxish */
584	}	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)
585		1082
586	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1083	const_iv (F_DUPFD_CLOEXEC)
587	{
588	ssize_t res;
589	off_t ooffset;
590		1084
591	pthread_mutex_lock (&preadwritelock);	1085	const_iv (F_OFD_GETLK)
592	ooffset = lseek (fd, 0, SEEK_CUR);	1086	const_iv (F_OFD_SETLK)
593	lseek (fd, offset, SEEK_SET);	1087	const_iv (F_OFD_GETLKW)
594	res = write (fd, buf, count);
595	lseek (fd, offset, SEEK_SET);
596	pthread_mutex_unlock (&preadwritelock);
597		1088
598	return res;	1089	const_iv (FIFREEZE)
599	}	1090	const_iv (FITHAW)
600	#endif	1091	const_iv (FITRIM)
		1092	const_iv (FICLONE)
		1093	const_iv (FICLONERANGE)
		1094	const_iv (FIDEDUPERANGE)
601		1095
602	#if !HAVE_FDATASYNC	1096	const_iv (FS_IOC_GETFLAGS)
603	# define fdatasync fsync	1097	const_iv (FS_IOC_SETFLAGS)
604	#endif	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)
605		1106
606	#if !HAVE_READAHEAD	1107	const_iv (FS_KEY_DESCRIPTOR_SIZE)
607	# define readahead aio_readahead
608		1108
609	static ssize_t readahead (int fd, off_t offset, size_t count)	1109	const_iv (FS_SECRM_FL)
610	{	1110	const_iv (FS_UNRM_FL)
611	dBUF;	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)
612		1128
613	while (count > 0)	1129	const_iv (FS_XFLAG_REALTIME)
614	{	1130	const_iv (FS_XFLAG_PREALLOC)
615	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	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)
616		1145
617	pread (fd, aio_buf, len, offset);	1146	const_iv (FIEMAP_FLAG_SYNC)
618	offset += len;	1147	const_iv (FIEMAP_FLAG_XATTR)
619	count -= len;	1148	const_iv (FIEMAP_FLAGS_COMPAT)
620	}	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)
621		1160
622	fBUF;	1161	const_iv (SPLICE_F_MOVE)
		1162	const_iv (SPLICE_F_NONBLOCK)
		1163	const_iv (SPLICE_F_MORE)
		1164	const_iv (SPLICE_F_GIFT)
623		1165
624	errno = 0;	1166	/* these are libeio constants, and are independent of gendef0 */
625	}	1167	const_eio (SEEK_SET)
626	#endif	1168	const_eio (SEEK_CUR)
		1169	const_eio (SEEK_END)
627		1170
628	#if !HAVE_READDIR_R	1171	const_eio (MCL_FUTURE)
629	# define readdir_r aio_readdir_r	1172	const_eio (MCL_CURRENT)
630		1173
631	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1174	const_eio (MS_ASYNC)
632		1175	const_eio (MS_INVALIDATE)
633	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	1176	const_eio (MS_SYNC)
634	{
635	struct dirent *e;
636	int errorno;
637		1177
638	pthread_mutex_lock (&readdirlock);	1178	const_eio (MT_MODIFY)
639		1179
640	e = readdir (dirp);	1180	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
641	errorno = errno;	1181	const_eio (SYNC_FILE_RANGE_WRITE)
		1182	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
642		1183
643	if (e)	1184	const_eio (FALLOC_FL_KEEP_SIZE)
644	{	1185	const_eio (FALLOC_FL_PUNCH_HOLE)
645	*res = ent;	1186	const_eio (FALLOC_FL_COLLAPSE_RANGE)
646	strcpy (ent->d_name, e->d_name);	1187	const_eio (FALLOC_FL_ZERO_RANGE)
647	}	1188	const_eio (FALLOC_FL_INSERT_RANGE)
648	else	1189	const_eio (FALLOC_FL_UNSHARE_RANGE)
649	*res = 0;
650		1190
651	pthread_mutex_unlock (&readdirlock);	1191	const_eio (RENAME_NOREPLACE)
		1192	const_eio (RENAME_EXCHANGE)
		1193	const_eio (RENAME_WHITEOUT)
652		1194
653	errno = errorno;	1195	const_eio (READDIR_DENTS)
654	return e ? 0 : -1;	1196	const_eio (READDIR_DIRS_FIRST)
655	}	1197	const_eio (READDIR_STAT_ORDER)
656	#endif	1198	const_eio (READDIR_FOUND_UNKNOWN)
657		1199
658	/* sendfile always needs emulation */	1200	const_eio (DT_UNKNOWN)
659	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	1201	const_eio (DT_FIFO)
660	{	1202	const_eio (DT_CHR)
661	ssize_t res;	1203	const_eio (DT_DIR)
662		1204	const_eio (DT_BLK)
663	if (!count)	1205	const_eio (DT_REG)
664	return 0;	1206	const_eio (DT_LNK)
665		1207	const_eio (DT_SOCK)
666	#if HAVE_SENDFILE	1208	const_eio (DT_WHT)
667	# if __linux
668	res = sendfile (ofd, ifd, &offset, count);
669
670	# elif __freebsd
671	/*
672	* Of course, the freebsd sendfile is a dire hack with no thoughts
673	* wasted on making it similar to other I/O functions.
674	*/
675	{
676	off_t sbytes;
677	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
678
679	if (res < 0 && sbytes)
680	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
681	res = sbytes;
682	}	1209	};
683		1210
684	# elif __hpux	1211	aio_stash = gv_stashpv ("IO::AIO" , 1);
685	res = sendfile (ofd, ifd, offset, count, 0, 0);	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);
686		1215
687	# elif __solaris	1216	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
688	{	1217	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
689	struct sendfilevec vec;
690	size_t sbytes;
691		1218
692	vec.sfv_fd = ifd;	1219	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
693	vec.sfv_flag = 0;
694	vec.sfv_off = offset;
695	vec.sfv_len = count;
696		1220
697	res = sendfilev (ofd, &vec, 1, &sbytes);	1221	reinit ();
		1222	}
698		1223
699	if (res < 0 && sbytes)	1224	void
		1225	reinit ()
		1226	PROTOTYPE:
		1227
		1228	void
		1229	max_poll_reqs (unsigned int nreqs)
		1230	PROTOTYPE: $
		1231	CODE:
		1232	eio_set_max_poll_reqs (nreqs);
		1233
		1234	void
		1235	max_poll_time (double nseconds)
		1236	PROTOTYPE: $
		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:
		1273	{
		1274	dREQ;
		1275
		1276	req->type = EIO_WD_OPEN;
		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;
700	res = sbytes;	1325	req->size = nbytes;
701	}	1326	req->int2 = flags;
702		1327
703	# endif	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
704	#else	1363	#else
705	res = -1;	1364	pipe (pipefd) < 0
706	errno = ENOSYS;	1365	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
707	#endif	1366	#endif
708		1367	|| close (pipefd [1]) < 0
709	if (res < 0
710	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
711	#if __solaris
712	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
713	#endif
714	)
715	)
716	{
717	/* emulate sendfile. this is a major pain in the ass */
718	dBUF;
719
720	res = 0;
721
722	while (count)
723	{
724	ssize_t cnt;
725
726	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
727
728	if (cnt <= 0)
729	{	1368	)
730	if (cnt && !res) res = -1;	1369	abort (); /*D*/
731	break;
732	}
733		1370
734	cnt = write (ofd, aio_buf, cnt);	1371	close_fd = pipefd [0];
735
736	if (cnt <= 0)
737	{
738	if (cnt && !res) res = -1;
739	break;
740	}
741
742	offset += cnt;
743	res += cnt;
744	count -= cnt;
745	}
746
747	fBUF;
748	}
749
750	return res;
751	}
752
753	/* read a full directory */
754	static int scandir_ (const char *path, void **namesp)
755	{
756	DIR *dirp;
757	union
758	{
759	struct dirent d;
760	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
761	} *u;
762	struct dirent *entp;
763	char *name, *names;
764	int memlen = 4096;
765	int memofs = 0;
766	int res = 0;
767	int errorno;
768
769	dirp = opendir (path);
770	if (!dirp)
771	return -1;
772
773	u = malloc (sizeof (*u));
774	names = malloc (memlen);
775
776	if (u && names)
777	for (;;)
778	{
779	errno = 0;
780	readdir_r (dirp, &u->d, &entp);
781
782	if (!entp)
783	break;
784
785	name = entp->d_name;
786
787	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
788	{
789	int len = strlen (name) + 1;
790
791	res++;
792
793	while (memofs + len > memlen)
794	{
795	memlen *= 2;
796	names = realloc (names, memlen);
797	if (!names)
798	break;
799	}
800
801	memcpy (names + memofs, name, len);
802	memofs += len;
803	}	1372	}
804	}
805		1373
806	errorno = errno;	1374	req->type = EIO_DUP2;
807	free (u);	1375	req->int1 = close_fd;
808	closedir (dirp);	1376	req->sv2 = newSVsv (fh);
809
810	if (errorno)
811	{
812	free (names);
813	errno = errorno;
814	res = -1;
815	}
816
817	*namesp = (void *)names;
818	return res;
819	}
820
821	/*****************************************************************************/
822
823	static void *aio_proc (void *thr_arg)
824	{
825	aio_req req;
826	int type;
827
828	do
829	{
830	pthread_mutex_lock (&reqlock);
831
832	for (;;)
833	{
834	req = reqs;
835
836	if (reqs)
837	{
838	reqs = reqs->next;
839	if (!reqs) reqe = 0;
840	}
841
842	if (req)
843	break;
844
845	pthread_cond_wait (&reqwait, &reqlock);
846	}
847
848	pthread_mutex_unlock (&reqlock);
849
850	errno = 0; /* strictly unnecessary */
851	type = req->type; /* remember type for QUIT check */
852
853	if (!(req->flags & FLAG_CANCELLED))
854	switch (type)
855	{
856	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
857	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
858
859	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
860	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
861
862	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
863	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
864	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
865
866	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
867	case REQ_CLOSE: req->result = close (req->fd); break;
868	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
869	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
870	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
871	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
872	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
873
874	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
875	case REQ_FSYNC: req->result = fsync (req->fd); break;
876	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
877
878	case REQ_SLEEP:
879	{
880	struct timeval tv;
881
882	tv.tv_sec = req->fd;
883	tv.tv_usec = req->fd2;
884
885	req->result = select (0, 0, 0, 0, &tv);
886	}
887
888	case REQ_GROUP:
889	case REQ_NOP:
890	case REQ_QUIT:
891	break;
892
893	default:
894	req->result = ENOSYS;
895	break;
896	}
897
898	req->errorno = errno;
899
900	pthread_mutex_lock (&reslock);
901
902	req->next = 0;	1377	req->int2 = fd;
903		1378
904	if (rese)	1379	REQ_SEND;
905	{
906	rese->next = req;
907	rese = req;
908	}
909	else
910	{
911	rese = ress = req;
912
913	/* write a dummy byte to the pipe so fh becomes ready */
914	write (respipe [1], &respipe, 1);
915	}
916
917	pthread_mutex_unlock (&reslock);
918	}
919	while (type != REQ_QUIT);
920
921	return 0;
922	}	1380	}
923		1381
924	/*****************************************************************************/
925
926	static void atfork_prepare (void)
927	{
928	pthread_mutex_lock (&reqlock);
929	pthread_mutex_lock (&reslock);
930	#if !HAVE_PREADWRITE
931	pthread_mutex_lock (&preadwritelock);
932	#endif
933	#if !HAVE_READDIR_R
934	pthread_mutex_lock (&readdirlock);
935	#endif
936	}
937
938	static void atfork_parent (void)
939	{
940	#if !HAVE_READDIR_R
941	pthread_mutex_unlock (&readdirlock);
942	#endif
943	#if !HAVE_PREADWRITE
944	pthread_mutex_unlock (&preadwritelock);
945	#endif
946	pthread_mutex_unlock (&reslock);
947	pthread_mutex_unlock (&reqlock);
948	}
949
950	static void atfork_child (void)
951	{
952	aio_req prv;
953
954	started = 0;
955
956	while (reqs)
957	{
958	prv = reqs;
959	reqs = prv->next;
960	req_free (prv);
961	}
962
963	reqs = reqe = 0;
964
965	while (ress)
966	{
967	prv = ress;
968	ress = prv->next;
969	req_free (prv);
970	}
971
972	ress = rese = 0;
973
974	close (respipe [0]);
975	close (respipe [1]);
976	create_pipe ();
977
978	atfork_parent ();
979	}
980
981	#define dREQ \
982	aio_req req; \
983	int req_pri = next_pri; \
984	next_pri = DEFAULT_PRI + PRI_BIAS; \
985	\
986	if (SvOK (callback) && !SvROK (callback)) \
987	croak ("callback must be undef or of reference type"); \
988	\
989	Newz (0, req, 1, aio_cb); \
990	if (!req) \
991	croak ("out of memory during aio_req allocation"); \
992	\
993	req->callback = newSVsv (callback); \
994	req->pri = req_pri
995
996	#define REQ_SEND \
997	req_send (req); \
998	\
999	if (GIMME_V != G_VOID) \
1000	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1001
1002	MODULE = IO::AIO PACKAGE = IO::AIO
1003
1004	PROTOTYPES: ENABLE
1005
1006	BOOT:
1007	{
1008	HV *stash = gv_stashpv ("IO::AIO", 1);
1009	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1010	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1011	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1012
1013	create_pipe ();
1014	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1015	}
1016
1017	void	1382	void
1018	min_parallel (nthreads)	1383	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1019	int nthreads
1020	PROTOTYPE: $
1021
1022	void
1023	max_parallel (nthreads)
1024	int nthreads
1025	PROTOTYPE: $
1026
1027	int
1028	max_outstanding (nreqs)
1029	int nreqs
1030	PROTOTYPE: $
1031	CODE:	1384	PPCODE:
1032	RETVAL = max_outstanding;
1033	max_outstanding = nreqs;
1034
1035	void
1036	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1037	SV * pathname
1038	int flags
1039	int mode
1040	SV * callback
1041	PROTOTYPE: $$$;$
1042	PPCODE:
1043	{	1385	{
		1386	int fd = s_fileno_croak (fh, 0);
1044	dREQ;	1387	dREQ;
1045		1388
1046	req->type = REQ_OPEN;	1389	req->type = EIO_SEEK;
1047	req->data = newSVsv (pathname);	1390	req->sv1 = newSVsv (fh);
1048	req->dataptr = SvPVbyte_nolen (req->data);	1391	req->int1 = fd;
1049	req->fd = flags;	1392	req->offs = SvVAL64 (offset);
1050	req->mode = mode;	1393	req->int2 = whence;
1051		1394
1052	REQ_SEND;	1395	REQ_SEND;
1053	}	1396	}
1054		1397
1055	void	1398	void
1056	aio_close (fh,callback=&PL_sv_undef)	1399	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1057	SV * fh
1058	SV * callback
1059	PROTOTYPE: $;$
1060	ALIAS:	1400	ALIAS:
1061	aio_close = REQ_CLOSE
1062	aio_fsync = REQ_FSYNC
1063	aio_fdatasync = REQ_FDATASYNC
1064	PPCODE:
1065	{
1066	dREQ;
1067
1068	req->type = ix;
1069	req->fh = newSVsv (fh);
1070	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1071
1072	REQ_SEND (req);
1073	}
1074
1075	void
1076	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1077	SV * fh
1078	UV offset
1079	UV length
1080	SV * data
1081	UV dataoffset
1082	SV * callback
1083	ALIAS:
1084	aio_read = REQ_READ	1401	aio_read = EIO_READ
1085	aio_write = REQ_WRITE	1402	aio_write = EIO_WRITE
1086	PROTOTYPE: $$$$$;$
1087	PPCODE:	1403	PPCODE:
1088	{	1404	{
1089	aio_req req;
1090	STRLEN svlen;	1405	STRLEN svlen;
		1406	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1091	char *svptr = SvPVbyte (data, svlen);	1407	char *svptr = SvPVbyte (data, svlen);
1092		1408	UV len = SvUV (length);
1093	SvUPGRADE (data, SVt_PV);
1094	SvPOK_on (data);
1095		1409
1096	if (dataoffset < 0)	1410	if (dataoffset < 0)
1097	dataoffset += svlen;	1411	dataoffset += svlen;
1098		1412
1099	if (dataoffset < 0 || dataoffset > svlen)	1413	if (dataoffset < 0 || dataoffset > svlen)
1100	croak ("data offset outside of string");	1414	croak ("dataoffset outside of data scalar");
1101		1415
1102	if (ix == REQ_WRITE)	1416	if (ix == EIO_WRITE)
1103	{	1417	{
1104	/* write: check length and adjust. */	1418	/* write: check length and adjust. */
1105	if (length < 0 || length + dataoffset > svlen)	1419	if (!SvOK (length) || len + dataoffset > svlen)
1106	length = svlen - dataoffset;	1420	len = svlen - dataoffset;
1107	}	1421	}
1108	else	1422	else
1109	{	1423	{
1110	/* read: grow scalar as necessary */	1424	/* read: check type and grow scalar as necessary */
		1425	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1111	svptr = SvGROW (data, length + dataoffset);	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");
1112	}	1429	}
1113
1114	if (length < 0)
1115	croak ("length must not be negative");
1116		1430
1117	{	1431	{
1118	dREQ;	1432	dREQ;
1119		1433
1120	req->type = ix;	1434	req->type = ix;
1121	req->fh = newSVsv (fh);	1435	req->sv1 = newSVsv (fh);
1122	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1436	req->int1 = fd;
1123	: IoOFP (sv_2io (fh)));	1437	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1124	req->offset = offset;	1438	req->size = len;
1125	req->length = length;
1126	req->data = SvREFCNT_inc (data);	1439	req->sv2 = SvREFCNT_inc (data);
1127	req->dataptr = (char *)svptr + dataoffset;	1440	req->ptr2 = (char *)svptr + dataoffset;
		1441	req->stroffset = dataoffset;
1128		1442
1129	if (!SvREADONLY (data))	1443	if (!SvREADONLY (data))
1130	{	1444	{
1131	SvREADONLY_on (data);	1445	SvREADONLY_on (data);
1132	req->data2ptr = (void *)data;	1446	req->flags |= FLAG_SV2_RO_OFF;
1133	}	1447	}
1134		1448
1135	REQ_SEND;	1449	REQ_SEND;
1136	}	1450	}
1137	}	1451	}
1138		1452
1139	void	1453	void
1140	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1454	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1141	SV * out_fh	1455	ALIAS:
1142	SV * in_fh	1456	aio_ioctl = EIO_IOCTL
1143	UV in_offset	1457	aio_fcntl = EIO_FCNTL
1144	UV length
1145	SV * callback
1146	PROTOTYPE: $$$$;$
1147	PPCODE:	1458	PPCODE:
1148	{	1459	{
1149	dREQ;	1460	int fd = s_fileno_croak (fh, 0);
		1461	char *svptr;
1150		1462
1151	req->type = REQ_SENDFILE;	1463	if (SvPOK (arg) || !SvNIOK (arg))
1152	req->fh = newSVsv (out_fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1154	req->fh2 = newSVsv (in_fh);
1155	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1156	req->offset = in_offset;
1157	req->length = length;
1158
1159	REQ_SEND;
1160	}
1161
1162	void
1163	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1164	SV * fh
1165	UV offset
1166	IV length
1167	SV * callback
1168	PROTOTYPE: $$$;$
1169	PPCODE:
1170	{
1171	dREQ;
1172
1173	req->type = REQ_READAHEAD;
1174	req->fh = newSVsv (fh);
1175	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1176	req->offset = offset;
1177	req->length = length;
1178
1179	REQ_SEND;
1180	}
1181
1182	void
1183	aio_stat (fh_or_path,callback=&PL_sv_undef)
1184	SV * fh_or_path
1185	SV * callback
1186	ALIAS:
1187	aio_stat = REQ_STAT
1188	aio_lstat = REQ_LSTAT
1189	PPCODE:
1190	{
1191	dREQ;
1192
1193	New (0, req->statdata, 1, Stat_t);
1194	if (!req->statdata)
1195	{	1464	{
1196	req_free (req);	1465	STRLEN svlen;
1197	croak ("out of memory during aio_req->statdata allocation");	1466	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
1198	}	1467	#ifdef IOCPARM_LEN
		1468	STRLEN need = IOCPARM_LEN (request);
		1469	#else
		1470	STRLEN need = 256;
		1471	#endif
1199		1472
1200	if (SvPOK (fh_or_path))	1473	if (svlen < need)
1201	{	1474	svptr = SvGROW (arg, need);
1202	req->type = ix;
1203	req->data = newSVsv (fh_or_path);
1204	req->dataptr = SvPVbyte_nolen (req->data);
1205	}	1475	}
1206	else	1476	else
		1477	svptr = (char *)SvIV (arg);
		1478
1207	{	1479	{
		1480	dREQ;
		1481
1208	req->type = REQ_FSTAT;	1482	req->type = ix;
1209	req->fh = newSVsv (fh_or_path);	1483	req->sv1 = newSVsv (fh);
1210	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1484	req->int1 = fd;
		1485	req->int2 = (long)request;
		1486	req->sv2 = SvREFCNT_inc (arg);
		1487	req->ptr2 = svptr;
		1488
		1489	REQ_SEND;
1211	}	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);
1212		1504
1213	REQ_SEND;	1505	REQ_SEND;
1214	}	1506	}
1215		1507
1216	void	1508	void
1217	aio_unlink (pathname,callback=&PL_sv_undef)	1509	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
1218	SV * pathname	1510	PPCODE:
1219	SV * callback	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)
1220	ALIAS:	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:
1221	aio_unlink = REQ_UNLINK	1657	aio_unlink = EIO_UNLINK
1222	aio_rmdir = REQ_RMDIR	1658	aio_rmdir = EIO_RMDIR
1223	aio_readdir = REQ_READDIR	1659	aio_readdir = EIO_READDIR
1224	PPCODE:	1660	PPCODE:
1225	{	1661	{
1226	dREQ;	1662	dREQ;
1227		1663
1228	req->type = ix;	1664	req->type = ix;
1229	req->data = newSVsv (pathname);	1665	req_set_path1 (req, pathname);
1230	req->dataptr = SvPVbyte_nolen (req->data);	1666
1231
1232	REQ_SEND;	1667	REQ_SEND;
1233	}	1668	}
1234		1669
1235	void	1670	void
1236	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1671	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1237	SV * oldpath
1238	SV * newpath
1239	SV * callback
1240	ALIAS:	1672	ALIAS:
1241	aio_link = REQ_LINK	1673	aio_link = EIO_LINK
1242	aio_symlink = REQ_SYMLINK	1674	aio_symlink = EIO_SYMLINK
1243	aio_rename = REQ_RENAME	1675	aio_rename = EIO_RENAME
1244	PPCODE:	1676	PPCODE:
1245	{	1677	{
		1678	eio_wd wd2 = 0;
1246	dREQ;	1679	dREQ;
1247		1680
1248	req->type = ix;	1681	req->type = ix;
1249	req->fh = newSVsv (oldpath);	1682	req_set_path1 (req, oldpath);
1250	req->data2ptr = SvPVbyte_nolen (req->fh);	1683	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1251	req->data = newSVsv (newpath);	1684	req->int3 = (long)wd2;
1252	req->dataptr = SvPVbyte_nolen (req->data);
1253		1685
1254	REQ_SEND;	1686	REQ_SEND;
1255	}	1687	}
1256		1688
1257	void	1689	void
1258	aio_sleep (delay,callback=&PL_sv_undef)	1690	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
1259	double delay
1260	SV * callback
1261	PPCODE:	1691	PPCODE:
1262	{	1692	{
		1693	eio_wd wd2 = 0;
1263	dREQ;	1694	dREQ;
1264		1695
1265	req->type = REQ_SLEEP;	1696	req->type = EIO_RENAME;
1266	req->fd = delay < 0. ? 0 : delay;	1697	req_set_path1 (req, oldpath);
1267	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1698	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1268		1699	req->int2 = flags;
		1700	req->int3 = (long)wd2;
		1701
1269	REQ_SEND;	1702	REQ_SEND;
1270	}	1703	}
1271		1704
1272	void	1705	void
1273	aio_group (callback=&PL_sv_undef)	1706	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1274	SV * callback	1707	PPCODE:
1275	PROTOTYPE: ;$	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
1276	PPCODE:	1724	PPCODE:
1277	{	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);
1278	dREQ;	1801	dREQ;
1279		1802
1280	req->type = REQ_GROUP;	1803	req->type = EIO_CUSTOM;
1281	req_send (req);	1804	req->sv1 = newSVsv (fh);
		1805	req->int1 = fd;
1282		1806
1283	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1807	req->feed = fiemap;
1284	}	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
1285		1815
		1816	REQ_SEND;
		1817	}
		1818
1286	void	1819	void
1287	aio_nop (callback=&PL_sv_undef)	1820	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
1288	SV * callback	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)
1289	PPCODE:	1859	PPCODE:
1290	{	1860	{
1291	dREQ;	1861	dREQ;
1292		1862
1293	req->type = REQ_NOP;	1863	req->type = EIO_BUSY;
		1864	req->nv1 = delay < 0. ? 0. : delay;
1294		1865
1295	REQ_SEND;	1866	REQ_SEND;
1296	}	1867	}
1297		1868
1298	#if 0
1299
1300	void	1869	void
1301	aio_pri (int pri = DEFAULT_PRI)	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)
1302	CODE:	1900	CODE:
		1901	RETVAL = next_pri;
		1902	if (items > 0)
		1903	{
1303	if (pri < PRI_MIN) pri = PRI_MIN;	1904	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1304	if (pri > PRI_MAX) pri = PRI_MAX;	1905	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1305	next_pri = pri + PRI_BIAS;	1906	next_pri = pri;
		1907	}
		1908	OUTPUT:
		1909	RETVAL
1306		1910
1307	#endif	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;
1308		1918
1309	void	1919	void
1310	flush ()	1920	flush ()
1311	PROTOTYPE:
1312	CODE:	1921	CODE:
1313	while (nreqs)	1922	while (eio_nreqs ())
1314	{	1923	{
1315	poll_wait ();	1924	poll_wait ();
1316	poll_cb ();	1925	poll_cb ();
1317	}	1926	}
1318		1927
1319	void	1928	int
1320	poll()	1929	poll ()
1321	PROTOTYPE:
1322	CODE:	1930	CODE:
1323	if (nreqs)
1324	{
1325	poll_wait ();	1931	poll_wait ();
1326	poll_cb ();	1932	RETVAL = poll_cb ();
1327	}
1328
1329	int
1330	poll_fileno()
1331	PROTOTYPE:
1332	CODE:
1333	RETVAL = respipe [0];
1334	OUTPUT:	1933	OUTPUT:
1335	RETVAL	1934	RETVAL
1336		1935
1337	int	1936	int
		1937	poll_fileno ()
		1938	CODE:
		1939	RETVAL = s_epipe_fd (&respipe);
		1940	OUTPUT:
		1941	RETVAL
		1942
		1943	int
1338	poll_cb(...)	1944	poll_cb (...)
1339	PROTOTYPE:	1945	PROTOTYPE:
1340	CODE:	1946	CODE:
1341	RETVAL = poll_cb ();	1947	RETVAL = poll_cb ();
1342	OUTPUT:	1948	OUTPUT:
1343	RETVAL	1949	RETVAL
1344		1950
1345	void	1951	void
1346	poll_wait()	1952	poll_wait ()
1347	PROTOTYPE:
1348	CODE:	1953	CODE:
1349	if (nreqs)
1350	poll_wait ();	1954	poll_wait ();
1351		1955
1352	int	1956	int
1353	nreqs()	1957	nreqs ()
1354	PROTOTYPE:
1355	CODE:	1958	CODE:
1356	RETVAL = nreqs;	1959	RETVAL = eio_nreqs ();
1357	OUTPUT:	1960	OUTPUT:
1358	RETVAL	1961	RETVAL
1359		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
1360	PROTOTYPES: DISABLE	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	}
1361		2267
1362	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	2268	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1363		2269
1364	void	2270	void
1365	cancel (aio_req_ornot req)	2271	cancel (aio_req_ornot req)
1366	CODE:	2272	CODE:
1367	req_cancel (req);	2273	eio_cancel (req);
1368		2274
1369	void	2275	void
1370	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	2276	cb (aio_req_ornot req, SV *callback = NO_INIT)
1371	CODE:	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
1372	SvREFCNT_dec (req->callback);	2286	SvREFCNT_dec (req->callback);
1373	req->callback = newSVsv (callback);	2287	req->callback = SvREFCNT_inc (cb_cv);
		2288	}
		2289	}
1374		2290
1375	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	2291	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1376		2292
1377	void	2293	void
1378	add (aio_req grp, ...)	2294	add (aio_req grp, ...)
1379	PPCODE:	2295	PPCODE:
1380	{	2296	{
1381	int i;	2297	int i;
1382	aio_req req;
1383		2298
1384	if (grp->fd == 2)	2299	if (grp->int1 == 2)
1385	croak ("cannot add requests to IO::AIO::GRP after the group finished");	2300	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1386		2301
1387	for (i = 1; i < items; ++i )	2302	for (i = 1; i < items; ++i )
1388	{	2303	{
		2304	aio_req req;
		2305
1389	if (GIMME_V != G_VOID)	2306	if (GIMME_V != G_VOID)
1390	XPUSHs (sv_2mortal (newSVsv (ST (i))));	2307	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1391		2308
1392	req = SvAIO_REQ (ST (i));	2309	req = SvAIO_REQ (ST (i));
1393		2310
1394	if (req)	2311	if (req)
1395	{	2312	eio_grp_add (grp, req);
1396	++grp->length;
1397	req->grp = grp;
1398
1399	req->grp_prev = 0;
1400	req->grp_next = grp->grp_first;
1401
1402	if (grp->grp_first)
1403	grp->grp_first->grp_prev = req;
1404
1405	grp->grp_first = req;
1406	}
1407	}	2313	}
1408	}	2314	}
		2315
		2316	void
		2317	cancel_subs (aio_req_ornot req)
		2318	CODE:
		2319	req_cancel_subs (req);
1409		2320
1410	void	2321	void
1411	result (aio_req grp, ...)	2322	result (aio_req grp, ...)
1412	CODE:	2323	CODE:
1413	{	2324	{
1414	int i;	2325	int i;
		2326	AV *av;
		2327
		2328	grp->errorno = errno;
		2329
1415	AV *av = newAV ();	2330	av = newAV ();
		2331	av_extend (av, items - 1);
1416		2332
1417	for (i = 1; i < items; ++i )	2333	for (i = 1; i < items; ++i )
1418	av_push (av, newSVsv (ST (i)));	2334	av_push (av, newSVsv (ST (i)));
1419		2335
1420	SvREFCNT_dec (grp->data);	2336	SvREFCNT_dec (grp->sv1);
1421	grp->data = (SV *)av;	2337	grp->sv1 = (SV *)av;
1422	}	2338	}
1423		2339
1424	void	2340	void
		2341	errno (aio_req grp, int errorno = errno)
		2342	CODE:
		2343	grp->errorno = errorno;
		2344
		2345	void
1425	feed_limit (aio_req grp, int limit)	2346	limit (aio_req grp, int limit)
1426	CODE:	2347	CODE:
1427	grp->fd2 = limit;	2348	eio_grp_limit (grp, limit);
1428	aio_grp_feed (grp);
1429		2349
1430	void	2350	void
1431	feed (aio_req grp, SV *callback=&PL_sv_undef)	2351	feed (aio_req grp, SV *callback = &PL_sv_undef)
1432	CODE:	2352	CODE:
1433	{	2353	{
1434	SvREFCNT_dec (grp->fh2);	2354	SvREFCNT_dec (grp->sv2);
1435	grp->fh2 = newSVsv (callback);	2355	grp->sv2 = newSVsv (callback);
		2356	grp->feed = aio_grp_feed;
1436		2357
1437	if (grp->fd2 <= 0)	2358	if (grp->int2 <= 0)
1438	grp->fd2 = 2;	2359	grp->int2 = 2;
1439		2360
1440	aio_grp_feed (grp);	2361	eio_grp_limit (grp, grp->int2);
1441	}	2362	}
1442		2363

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