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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.62 by root, Mon Oct 23 22:45:18 2006 UTC vs.
Revision 1.175 by root, Wed Dec 1 04:43:12 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
18	#include <limits.h>	17	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	18	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	19	#include <sched.h>
23		20
24	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
25	# if __linux
26	# include <sys/sendfile.h>	22	# include <sys/mman.h>
27	# elif __freebsd	23	#endif
28	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
29	# include <sys/uio.h>	68	# include <sys/time.h>
30	# elif __hpux
31	# include <sys/socket.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		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	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	#endif
		128	#ifndef POSIX_FADV_SEQUENTIAL
		129	# define POSIX_FADV_SEQUENTIAL 0
		130	#endif
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134	#ifndef POSIX_FADV_NOREUSE
		135	# define POSIX_FADV_NOREUSE 0
		136	#endif
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140	#ifndef POSIX_FADV_DONTNEED
		141	# define POSIX_FADV_DONTNEED 0
		142	#endif
		143
		144	#if !HAVE_POSIX_FADVISE
		145	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#ifndef POSIX_MADV_NORMAL
		149	# define POSIX_MADV_NORMAL 0
		150	#endif
		151	#ifndef POSIX_MADV_SEQUENTIAL
		152	# define POSIX_MADV_SEQUENTIAL 0
		153	#endif
		154	#ifndef POSIX_MADV_RANDOM
		155	# define POSIX_MADV_RANDOM 0
		156	#endif
		157	#ifndef POSIX_MADV_WILLNEED
		158	# define POSIX_MADV_WILLNEED 0
		159	#endif
		160	#ifndef POSIX_MADV_DONTNEED
		161	# define POSIX_MADV_DONTNEED 0
		162	#endif
		163
		164	#if !HAVE_POSIX_MADVISE
		165	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		166	#endif
		167
		168	#ifndef PROT_NONE
		169	# define PROT_NONE 0
		170	#endif
		171	#ifndef PROT_READ
		172	# define PROT_READ 0
		173	#endif
		174	#ifndef PROT_WRITE
		175	# define PROT_READ 0
		176	#endif
		177	#ifndef PROT_EXEC
		178	# define PROT_EXEC 0
		179	#endif
		180
		181	#ifndef ST_NODEV
		182	# define ST_NODEV 0
		183	#endif
		184	#ifndef ST_NOEXEC
		185	# define ST_NOEXEC 0
		186	#endif
		187	#ifndef ST_SYNCHRONOUS
		188	# define ST_SYNCHRONOUS 0
		189	#endif
		190	#ifndef ST_MANDLOCK
		191	# define ST_MANDLOCK 0
		192	#endif
		193	#ifndef ST_WRITE
		194	# define ST_WRITE 0
		195	#endif
		196	#ifndef ST_APPEND
		197	# define ST_APPEND 0
		198	#endif
		199	#ifndef ST_IMMUTABLE
		200	# define ST_IMMUTABLE 0
		201	#endif
		202	#ifndef ST_NOATIME
		203	# define ST_NOATIME 0
		204	#endif
		205	#ifndef ST_NODIRATIME
		206	# define ST_NODIRATIME 0
		207	#endif
		208	#ifndef ST_RELATIME
		209	# define ST_RELATIME 0
		210	#endif
		211
		212	#ifndef MAP_ANONYMOUS
		213	# ifdef MAP_ANON
		214	# define MAP_ANONYMOUS MAP_ANON
34	# else	215	# else
35	# error sendfile support requested but not available	216	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	217	# endif
37	#endif	218	#endif
38		219	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	220	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	221	#endif
43		222	#ifndef MAP_LOCKED
44	#if __ia64	223	# define MAP_LOCKED 0
45	# define STACKSIZE 65536
46	#else
47	# define STACKSIZE 8192
48	#endif	224	#endif
		225	#ifndef MAP_NORESERVE
		226	# define MAP_NORESERVE 0
		227	#endif
		228	#ifndef MAP_POPULATE
		229	# define MAP_POPULATE 0
		230	#endif
		231	#ifndef MAP_NONBLOCK
		232	# define MAP_NONBLOCK 0
		233	#endif
		234
		235	#ifndef PAGESIZE
		236	# define PAGESIZE sysconf (_SC_PAGESIZE)
		237	#endif
		238
		239	static int req_invoke (eio_req *req);
		240	#define EIO_FINISH(req) req_invoke (req)
		241	static void req_destroy (eio_req *grp);
		242	#define EIO_DESTROY(req) req_destroy (req)
49		243
50	enum {	244	enum {
51	REQ_QUIT,	245	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,
62	};	246	};
63		247
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	248	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		249
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	STRLEN dataoffset;
80	int type;
81	int fd, fd2;
82	int errorno;
83	mode_t mode; /* open */
84
85	unsigned char flags;
86	unsigned char pri;
87
88	SV *self; /* the perl counterpart of this request, if any */
89	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
90	} aio_cb;
91
92	enum {
93	FLAG_CANCELLED = 0x01,
94	};
95
96	typedef aio_cb *aio_req;	250	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	251	typedef eio_req *aio_req_ornot;
98		252
99	enum {	253	static SV *on_next_submit;
100	PRI_MIN = -4,	254	static int next_pri = EIO_PRI_DEFAULT;
101	PRI_MAX = 4,
102
103	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,
105	};
106
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108
109	static int started, wanted;
110	static volatile int nreqs;
111	static int max_outstanding = 1<<30;	255	static int max_outstanding;
112	static int respipe [2];
113		256
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	257	static s_epipe respipe;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		258
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	259	static void req_destroy (aio_req req);
119	static volatile aio_req ress, rese; /* queue start, queue end */
120
121	static void req_invoke (aio_req req);	260	static void req_cancel (aio_req req);
122	static void req_free (aio_req req);	261
		262	static void want_poll (void)
		263	{
		264	/* write a dummy byte to the pipe so fh becomes ready */
		265	s_epipe_signal (&respipe);
		266	}
		267
		268	static void done_poll (void)
		269	{
		270	/* read any signals sent by the worker threads */
		271	s_epipe_drain (&respipe);
		272	}
123		273
124	/* must be called at most once */	274	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	275	static SV *req_sv (aio_req req, HV *stash)
126	{	276	{
127	if (!req->self)	277	if (!req->self)
128	{	278	{
129	req->self = (SV *)newHV ();	279	req->self = (SV *)newHV ();
130	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	280	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
131	}	281	}
132		282
133	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	283	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
134	}	284	}
135		285
136	static aio_req SvAIO_REQ (SV *sv)	286	static aio_req SvAIO_REQ (SV *sv)
137	{	287	{
138	MAGIC *mg;	288	MAGIC *mg;
139		289
140	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	290	if (!SvROK (sv)
		291	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		292	&& SvSTASH (SvRV (sv)) != aio_req_stash
		293	&& !sv_derived_from (sv, "IO::AIO::REQ")))
141	croak ("object of class " AIO_REQ_KLASS " expected");	294	croak ("object of class IO::AIO::REQ expected");
142		295
143	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	296	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
144		297
145	return mg ? (aio_req)mg->mg_ptr : 0;	298	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	299	}
147		300
148	static void aio_grp_feed (aio_req grp)	301	static void aio_grp_feed (aio_req grp)
149	{	302	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	303	if (grp->sv2 && SvOK (grp->sv2))
151	{	304	{
152	int old_len = grp->length;	305	dSP;
153		306
154	if (grp->fh2 && SvOK (grp->fh2))	307	ENTER;
		308	SAVETMPS;
		309	PUSHMARK (SP);
		310	XPUSHs (req_sv (grp, aio_grp_stash));
		311	PUTBACK;
		312	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		313	SPAGAIN;
		314	FREETMPS;
		315	LEAVE;
		316	}
		317	}
		318
		319	static void req_submit (eio_req *req)
		320	{
		321	eio_submit (req);
		322
		323	if (expect_false (on_next_submit))
		324	{
		325	dSP;
		326	SV *cb = sv_2mortal (on_next_submit);
		327
		328	on_next_submit = 0;
		329
		330	PUSHMARK (SP);
		331	PUTBACK;
		332	call_sv (cb, G_DISCARD | G_EVAL);
		333	}
		334	}
		335
		336	static int req_invoke (eio_req *req)
		337	{
		338	if (req->flags & FLAG_SV2_RO_OFF)
		339	SvREADONLY_off (req->sv2);
		340
		341	if (!EIO_CANCELLED (req) && req->callback)
		342	{
		343	dSP;
		344	static SV *sv_result_cache; /* caches the result integer SV */
		345	SV *sv_result;
		346
		347	ENTER;
		348	SAVETMPS;
		349	PUSHMARK (SP);
		350	EXTEND (SP, 1);
		351
		352	/* do not recreate the result IV from scratch each time */
		353	if (expect_true (sv_result_cache))
155	{	354	{
156	dSP;	355	sv_result = sv_result_cache; sv_result_cache = 0;
157		356	SvIV_set (sv_result, req->result);
158	ENTER;
159	SAVETMPS;
160	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);
164	SPAGAIN;
165	FREETMPS;
166	LEAVE;
167	}	357	}
168		358	else
169	/* stop if no progress has been made */
170	if (old_len == grp->length)
171	{	359	{
172	SvREFCNT_dec (grp->fh2);	360	sv_result = newSViv (req->result);
173	grp->fh2 = 0;	361	SvREADONLY_on (sv_result);
174	break;
175	}	362	}
		363
		364	switch (req->type)
		365	{
		366	case EIO_READDIR:
		367	{
		368	SV *rv = &PL_sv_undef;
		369
		370	if (req->result >= 0)
		371	{
		372	int i;
		373	char *names = (char *)req->ptr2;
		374	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		375	AV *av = newAV ();
		376
		377	av_extend (av, req->result - 1);
		378
		379	for (i = 0; i < req->result; ++i)
		380	{
		381	if (req->int1 & EIO_READDIR_DENTS)
		382	{
		383	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		384
		385	if (req->int1 & EIO_READDIR_CUSTOM2)
		386	{
		387	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		388	AV *avent = newAV ();
		389
		390	av_extend (avent, 2);
		391
		392	if (!sv_type [ent->type])
		393	{
		394	sv_type [ent->type] = newSViv (ent->type);
		395	SvREADONLY_on (sv_type [ent->type]);
		396	}
		397
		398	av_store (avent, 0, namesv);
		399	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		400	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		401
		402	av_store (av, i, newRV_noinc ((SV *)avent));
		403	}
		404	else
		405	av_store (av, i, namesv);
		406
		407	++ent;
		408	}
		409	else
		410	{
		411	SV *name = newSVpv (names, 0);
		412	av_store (av, i, name);
		413	names += SvCUR (name) + 1;
		414	}
		415	}
		416
		417	rv = sv_2mortal (newRV_noinc ((SV *)av));
		418	}
		419
		420	PUSHs (rv);
		421
		422	if (req->int1 & EIO_READDIR_CUSTOM1)
		423	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		424	}
		425	break;
		426
		427	case EIO_OPEN:
		428	{
		429	/* convert fd to fh */
		430	SV *fh = &PL_sv_undef;
		431
		432	if (req->result >= 0)
		433	{
		434	GV *gv = (GV *)sv_newmortal ();
		435	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		436	char sym [64];
		437	int symlen;
		438
		439	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		440	gv_init (gv, aio_stash, sym, symlen, 0);
		441
		442	symlen = snprintf (
		443	sym,
		444	sizeof (sym),
		445	"%s&=%d",
		446	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		447	(int)req->result
		448	);
		449
		450	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		451	fh = (SV *)gv;
		452	}
		453
		454	PUSHs (fh);
		455	}
		456	break;
		457
		458	case EIO_STATVFS:
		459	case EIO_FSTATVFS:
		460	{
		461	SV *rv = &PL_sv_undef;
		462
		463	if (req->result >= 0)
		464	{
		465	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		466	HV *hv = newHV ();
		467
		468	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		469
		470	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		471	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		472	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		473	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		474	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		475	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		476	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		477	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		478	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		479	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		480	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		481	}
		482
		483	PUSHs (rv);
		484	}
		485
		486	break;
		487
		488	case EIO_GROUP:
		489	req->int1 = 2; /* mark group as finished */
		490
		491	if (req->sv1)
		492	{
		493	int i;
		494	AV *av = (AV *)req->sv1;
		495
		496	EXTEND (SP, AvFILL (av) + 1);
		497	for (i = 0; i <= AvFILL (av); ++i)
		498	PUSHs (*av_fetch (av, i, 0));
		499	}
		500	break;
		501
		502	case EIO_NOP:
		503	case EIO_BUSY:
		504	break;
		505
		506	case EIO_READLINK:
		507	if (req->result > 0)
		508	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		509	break;
		510
		511	case EIO_STAT:
		512	case EIO_LSTAT:
		513	case EIO_FSTAT:
		514	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		515	PL_laststatval = req->result;
		516	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		517	PUSHs (sv_result);
		518	break;
		519
		520	case EIO_READ:
		521	{
		522	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		523	*SvEND (req->sv2) = 0;
		524	SvPOK_only (req->sv2);
		525	SvSETMAGIC (req->sv2);
		526	PUSHs (sv_result);
		527	}
		528	break;
		529
		530	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		531	if (req->result > 0)
		532	SvIV_set (sv_result, 0);
		533	/* FALLTHROUGH */
		534
		535	default:
		536	PUSHs (sv_result);
		537	break;
		538	}
		539
		540	errno = req->errorno;
		541
		542	PUTBACK;
		543	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		544	SPAGAIN;
		545
		546	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		547	SvREFCNT_dec (sv_result);
		548	else
		549	sv_result_cache = sv_result;
		550
		551	FREETMPS;
		552	LEAVE;
		553
		554	PUTBACK;
176	}	555	}
177	}
178		556
179	static void aio_grp_dec (aio_req grp)	557	return !!SvTRUE (ERRSV);
180	{
181	--grp->length;
182
183	/* call feeder, if applicable */
184	aio_grp_feed (grp);
185
186	/* finish, if done */
187	if (!grp->length && grp->fd)
188	{
189	req_invoke (grp);
190	req_free (grp);
191	}
192	}	558	}
193		559
194	static void poll_wait ()
195	{
196	fd_set rfd;
197
198	while (nreqs)
199	{
200	aio_req req;
201	pthread_mutex_lock (&reslock);
202	req = ress;
203	pthread_mutex_unlock (&reslock);
204
205	if (req)
206	return;
207
208	FD_ZERO(&rfd);
209	FD_SET(respipe [0], &rfd);
210
211	select (respipe [0] + 1, &rfd, 0, 0, 0);
212	}
213	}
214
215	static void req_invoke (aio_req req)
216	{
217	dSP;
218	int errorno = errno;
219
220	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
221	return;
222
223	errno = req->errorno;
224
225	ENTER;
226	SAVETMPS;
227	PUSHMARK (SP);
228	EXTEND (SP, 1);
229
230	switch (req->type)
231	{
232	case REQ_READDIR:
233	{
234	SV *rv = &PL_sv_undef;
235
236	if (req->result >= 0)
237	{
238	char *buf = req->data2ptr;
239	AV *av = newAV ();
240
241	while (req->result)
242	{
243	SV *sv = newSVpv (buf, 0);
244
245	av_push (av, sv);
246	buf += SvCUR (sv) + 1;
247	req->result--;
248	}
249
250	rv = sv_2mortal (newRV_noinc ((SV *)av));
251	}
252
253	PUSHs (rv);
254	}
255	break;
256
257	case REQ_OPEN:
258	{
259	/* convert fd to fh */
260	SV *fh;
261
262	PUSHs (sv_2mortal (newSViv (req->result)));
263	PUTBACK;
264	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
265	SPAGAIN;
266
267	fh = SvREFCNT_inc (POPs);
268
269	PUSHMARK (SP);
270	XPUSHs (sv_2mortal (fh));
271	}
272	break;
273
274	case REQ_GROUP:
275	req->fd = 2; /* mark group as finished */
276
277	if (req->data)
278	{
279	int i;
280	AV *av = (AV *)req->data;
281
282	EXTEND (SP, AvFILL (av) + 1);
283	for (i = 0; i <= AvFILL (av); ++i)
284	PUSHs (*av_fetch (av, i, 0));
285	}
286	break;
287
288	case REQ_NOP:
289	case REQ_SLEEP:
290	break;
291
292	default:
293	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;
295	}
296
297
298	PUTBACK;
299	call_sv (req->callback, G_VOID | G_EVAL);
300	SPAGAIN;
301
302	FREETMPS;
303	LEAVE;
304
305	errno = errorno;
306
307	if (SvTRUE (ERRSV))
308	{
309	req_free (req);
310	croak (0);
311	}
312	}
313
314	static void req_free (aio_req req)	560	static void req_destroy (aio_req req)
315	{	561	{
316	if (req->grp)
317	{
318	aio_req grp = req->grp;
319
320	/* unlink request */
321	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
322	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
323
324	if (grp->grp_first == req)
325	grp->grp_first = req->grp_next;
326
327	aio_grp_dec (grp);
328	}
329
330	if (req->self)	562	if (req->self)
331	{	563	{
332	sv_unmagic (req->self, PERL_MAGIC_ext);	564	sv_unmagic (req->self, PERL_MAGIC_ext);
333	SvREFCNT_dec (req->self);	565	SvREFCNT_dec (req->self);
334	}	566	}
335		567
336	SvREFCNT_dec (req->data);
337	SvREFCNT_dec (req->fh);	568	SvREFCNT_dec (req->sv1);
338	SvREFCNT_dec (req->fh2);	569	SvREFCNT_dec (req->sv2);
339	SvREFCNT_dec (req->callback);	570	SvREFCNT_dec (req->callback);
340	Safefree (req->statdata);
341
342	if (req->type == REQ_READDIR && req->result >= 0)
343	free (req->data2ptr);
344		571
345	Safefree (req);	572	Safefree (req);
346	}	573	}
347		574
348	static void req_cancel (aio_req req)	575	static void req_cancel_subs (aio_req grp)
349	{	576	{
350	req->flags |= FLAG_CANCELLED;	577	aio_req sub;
351		578
352	if (req->type == REQ_GROUP)	579	if (grp->type != EIO_GROUP)
		580	return;
		581
		582	SvREFCNT_dec (grp->sv2);
		583	grp->sv2 = 0;
		584
		585	eio_grp_cancel (grp);
		586	}
		587
		588	static void
		589	create_respipe (void)
		590	{
		591	if (s_epipe_renew (&respipe))
		592	croak ("IO::AIO: unable to initialize result pipe");
		593	}
		594
		595	static void poll_wait (void)
		596	{
		597	while (eio_nreqs ())
353	{	598	{
354	aio_req sub;	599	int size;
355		600
356	for (sub = req->grp_first; sub; sub = sub->grp_next)	601	X_LOCK (reslock);
357	req_cancel (sub);	602	size = res_queue.size;
		603	X_UNLOCK (reslock);
		604
		605	if (size)
		606	return;
		607
		608	etp_maybe_start_thread ();
		609
		610	s_epipe_wait (&respipe);
358	}	611	}
359	}	612	}
360		613
361	static int poll_cb ()	614	static int poll_cb (void)
362	{	615	{
363	dSP;
364	int count = 0;
365	int do_croak = 0;
366	aio_req req;
367
368	for (;;)	616	for (;;)
369	{	617	{
370	pthread_mutex_lock (&reslock);	618	int res = eio_poll ();
371	req = ress;
372		619
373	if (req)	620	if (res > 0)
374	{
375	ress = req->next;
376
377	if (!ress)
378	{
379	/* read any signals sent by the worker threads */
380	char buf [32];
381	while (read (respipe [0], buf, 32) == 32)
382	;
383
384	rese = 0;
385	}
386	}
387
388	pthread_mutex_unlock (&reslock);
389
390	if (!req)
391	break;	621	croak (0);
392		622
393	--nreqs;	623	if (!max_outstanding || max_outstanding > eio_nreqs ())
		624	return res;
394		625
395	if (req->type == REQ_QUIT)	626	poll_wait ();
396	started--;
397	else if (req->type == REQ_GROUP && req->length)
398	{
399	req->fd = 1; /* mark request as delayed */
400	continue;
401	}
402	else
403	{
404	if (req->type == REQ_READ)
405	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
406
407	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
408	SvREADONLY_off (req->data);
409
410	if (req->statdata)
411	{
412	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
413	PL_laststatval = req->result;
414	PL_statcache = *(req->statdata);
415	}
416
417	req_invoke (req);
418
419	count++;
420	}
421
422	req_free (req);
423	}	627	}
424
425	return count;
426	}	628	}
427		629
428	static void *aio_proc(void *arg);
429
430	static void start_thread (void)	630	static void atfork_child (void)
431	{	631	{
432	sigset_t fullsigset, oldsigset;	632	create_respipe ();
433	pthread_t tid;
434	pthread_attr_t attr;
435
436	pthread_attr_init (&attr);
437	pthread_attr_setstacksize (&attr, STACKSIZE);
438	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
439
440	sigfillset (&fullsigset);
441	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
442
443	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
444	started++;
445
446	sigprocmask (SIG_SETMASK, &oldsigset, 0);
447	}
448
449	static void req_send (aio_req req)
450	{
451	while (started < wanted && nreqs >= started)
452	start_thread ();
453
454	++nreqs;
455
456	pthread_mutex_lock (&reqlock);
457
458	req->next = 0;
459
460	if (reqe)
461	{
462	reqe->next = req;
463	reqe = req;
464	}
465	else
466	reqe = reqs = req;
467
468	pthread_cond_signal (&reqwait);
469	pthread_mutex_unlock (&reqlock);
470
471	if (nreqs > max_outstanding)
472	for (;;)
473	{
474	poll_cb ();
475
476	if (nreqs <= max_outstanding)
477	break;
478
479	poll_wait ();
480	}
481	}
482
483	static void end_thread (void)
484	{
485	aio_req req;
486	Newz (0, req, 1, aio_cb);
487	req->type = REQ_QUIT;
488
489	req_send (req);
490	}
491
492	static void min_parallel (int nthreads)
493	{
494	if (wanted < nthreads)
495	wanted = nthreads;
496	}
497
498	static void max_parallel (int nthreads)
499	{
500	int cur = started;
501
502	if (wanted > nthreads)
503	wanted = nthreads;
504
505	while (cur > wanted)
506	{
507	end_thread ();
508	cur--;
509	}
510
511	while (started > wanted)
512	{
513	poll_wait ();
514	poll_cb ();
515	}
516	}
517
518	static void create_pipe ()
519	{
520	if (pipe (respipe))
521	croak ("unable to initialize result pipe");
522
523	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
524	croak ("cannot set result pipe to nonblocking mode");
525
526	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
527	croak ("cannot set result pipe to nonblocking mode");
528	}	633	}
529		634
530	/*****************************************************************************/	635	/*****************************************************************************/
531	/* work around various missing functions */
532		636
533	#if !HAVE_PREADWRITE	637	#if !_POSIX_MAPPED_FILES
534	# define pread aio_pread	638	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
535	# define pwrite aio_pwrite	639	# define munmap(addr,length) (errno = ENOSYS, -1)
536		640	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
537	/*	641	# define PROT_NONE 0
538	* make our pread/pwrite safe against themselves, but not against	642	# define PROT_WRITE 0
539	* normal read/write by using a mutex. slows down execution a lot,	643	# define MAP_PRIVATE 0
540	* but that's your problem, not mine.	644	# define MAP_SHARED 0
541	*/	645	# define MAP_FIXED 0
542	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
543
544	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
545	{
546	ssize_t res;
547	off_t ooffset;
548
549	pthread_mutex_lock (&preadwritelock);
550	ooffset = lseek (fd, 0, SEEK_CUR);
551	lseek (fd, offset, SEEK_SET);
552	res = read (fd, buf, count);
553	lseek (fd, ooffset, SEEK_SET);
554	pthread_mutex_unlock (&preadwritelock);
555
556	return res;
557	}
558
559	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
560	{
561	ssize_t res;
562	off_t ooffset;
563
564	pthread_mutex_lock (&preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);
567	res = write (fd, buf, count);
568	lseek (fd, offset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);
570
571	return res;
572	}
573	#endif
574
575	#if !HAVE_FDATASYNC
576	# define fdatasync fsync
577	#endif
578
579	#if !HAVE_READAHEAD
580	# define readahead aio_readahead
581
582	static ssize_t readahead (int fd, off_t offset, size_t count)
583	{
584	char readahead_buf[4096];
585
586	while (count > 0)
587	{
588	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
589
590	pread (fd, readahead_buf, len, offset);
591	offset += len;
592	count -= len;
593	}
594
595	errno = 0;
596	}
597	#endif
598
599	#if !HAVE_READDIR_R
600	# define readdir_r aio_readdir_r
601
602	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
603
604	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
605	{
606	struct dirent *e;
607	int errorno;
608
609	pthread_mutex_lock (&readdirlock);
610
611	e = readdir (dirp);
612	errorno = errno;
613
614	if (e)
615	{
616	*res = ent;
617	strcpy (ent->d_name, e->d_name);
618	}
619	else
620	*res = 0;
621
622	pthread_mutex_unlock (&readdirlock);
623
624	errno = errorno;
625	return e ? 0 : -1;
626	}
627	#endif
628
629	/* sendfile always needs emulation */
630	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
631	{
632	ssize_t res;
633
634	if (!count)
635	return 0;
636
637	#if HAVE_SENDFILE
638	# if __linux
639	res = sendfile (ofd, ifd, &offset, count);
640
641	# elif __freebsd
642	/*
643	* Of course, the freebsd sendfile is a dire hack with no thoughts
644	* wasted on making it similar to other I/O functions.
645	*/
646	{
647	off_t sbytes;
648	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
649
650	if (res < 0 && sbytes)
651	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
652	res = sbytes;
653	}
654
655	# elif __hpux
656	res = sendfile (ofd, ifd, offset, count, 0, 0);
657
658	# elif __solaris
659	{
660	struct sendfilevec vec;
661	size_t sbytes;
662
663	vec.sfv_fd = ifd;
664	vec.sfv_flag = 0;
665	vec.sfv_off = offset;
666	vec.sfv_len = count;
667
668	res = sendfilev (ofd, &vec, 1, &sbytes);
669
670	if (res < 0 && sbytes)
671	res = sbytes;
672	}
673
674	# endif	646	#endif
675	#else
676	res = -1;
677	errno = ENOSYS;
678	#endif
679		647
680	if (res < 0	648	#define MMAP_MAGIC PERL_MAGIC_ext
681	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
682	#if __solaris
683	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
684	#endif
685	)
686	)
687	{
688	/* emulate sendfile. this is a major pain in the ass */
689	char buf[4096];
690	res = 0;
691		649
692	while (count)	650	static int
693	{	651	mmap_free (pTHX_ SV *sv, MAGIC *mg)
694	ssize_t cnt;
695
696	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
697
698	if (cnt <= 0)
699	{
700	if (cnt && !res) res = -1;
701	break;
702	}
703
704	cnt = write (ofd, buf, cnt);
705
706	if (cnt <= 0)
707	{
708	if (cnt && !res) res = -1;
709	break;
710	}
711
712	offset += cnt;
713	res += cnt;
714	count -= cnt;
715	}
716	}
717
718	return res;
719	}
720
721	/* read a full directory */
722	static int scandir_ (const char *path, void **namesp)
723	{	652	{
724	DIR *dirp = opendir (path);	653	int old_errno = errno;
725	union	654	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
726	{
727	struct dirent d;
728	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
729	} u;
730	struct dirent *entp;
731	char *name, *names;
732	int memlen = 4096;
733	int memofs = 0;
734	int res = 0;
735	int errorno;
736
737	if (!dirp)
738	return -1;
739
740	names = malloc (memlen);
741
742	for (;;)
743	{
744	errno = 0, readdir_r (dirp, &u.d, &entp);
745
746	if (!entp)
747	break;
748
749	name = entp->d_name;
750
751	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
752	{
753	int len = strlen (name) + 1;
754
755	res++;
756
757	while (memofs + len > memlen)
758	{
759	memlen *= 2;
760	names = realloc (names, memlen);
761	if (!names)
762	break;
763	}
764
765	memcpy (names + memofs, name, len);
766	memofs += len;
767	}
768	}
769
770	errorno = errno;	655	errno = old_errno;
771	closedir (dirp);
772		656
773	if (errorno)	657	mg->mg_obj = 0; /* just in case */
774	{
775	free (names);
776	errno = errorno;
777	res = -1;
778	}
779		658
780	*namesp = (void *)names;	659	SvREADONLY_off (sv);
		660
		661	if (SvPVX (sv) != mg->mg_ptr)
		662	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		663
		664	SvCUR_set (sv, 0);
		665	SvPVX (sv) = 0;
		666	SvOK_off (sv);
		667
781	return res;	668	return 0;
782	}	669	}
		670
		671	static MGVTBL mmap_vtbl = {
		672	0, 0, 0, 0, mmap_free
		673	};
783		674
784	/*****************************************************************************/	675	/*****************************************************************************/
785		676
786	static void *aio_proc (void *thr_arg)	677	static SV *
		678	get_cb (SV *cb_sv)
787	{	679	{
788	aio_req req;	680	SvGETMAGIC (cb_sv);
789	int type;	681	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
790
791	do
792	{
793	pthread_mutex_lock (&reqlock);
794
795	for (;;)
796	{
797	req = reqs;
798
799	if (reqs)
800	{
801	reqs = reqs->next;
802	if (!reqs) reqe = 0;
803	}
804
805	if (req)
806	break;
807
808	pthread_cond_wait (&reqwait, &reqlock);
809	}
810
811	pthread_mutex_unlock (&reqlock);
812
813	errno = 0; /* strictly unnecessary */
814	type = req->type; /* remember type for QUIT check */
815
816	if (!(req->flags & FLAG_CANCELLED))
817	switch (type)
818	{
819	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
820	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
821
822	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
823	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
824
825	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
826	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
827	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
828
829	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
830	case REQ_CLOSE: req->result = close (req->fd); break;
831	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
832	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
833	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
834	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
835	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
836
837	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
838	case REQ_FSYNC: req->result = fsync (req->fd); break;
839	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
840
841	case REQ_SLEEP:
842	{
843	struct timeval tv;
844
845	tv.tv_sec = req->fd;
846	tv.tv_usec = req->fd2;
847
848	req->result = select (0, 0, 0, 0, &tv);
849	}
850
851	case REQ_GROUP:
852	case REQ_NOP:
853	case REQ_QUIT:
854	break;
855
856	default:
857	req->result = ENOSYS;
858	break;
859	}
860
861	req->errorno = errno;
862
863	pthread_mutex_lock (&reslock);
864
865	req->next = 0;
866
867	if (rese)
868	{
869	rese->next = req;
870	rese = req;
871	}
872	else
873	{
874	rese = ress = req;
875
876	/* write a dummy byte to the pipe so fh becomes ready */
877	write (respipe [1], &respipe, 1);
878	}
879
880	pthread_mutex_unlock (&reslock);
881	}
882	while (type != REQ_QUIT);
883
884	return 0;
885	}
886
887	/*****************************************************************************/
888
889	static void atfork_prepare (void)
890	{
891	pthread_mutex_lock (&reqlock);
892	pthread_mutex_lock (&reslock);
893	#if !HAVE_PREADWRITE
894	pthread_mutex_lock (&preadwritelock);
895	#endif
896	#if !HAVE_READDIR_R
897	pthread_mutex_lock (&readdirlock);
898	#endif
899	}
900
901	static void atfork_parent (void)
902	{
903	#if !HAVE_READDIR_R
904	pthread_mutex_unlock (&readdirlock);
905	#endif
906	#if !HAVE_PREADWRITE
907	pthread_mutex_unlock (&preadwritelock);
908	#endif
909	pthread_mutex_unlock (&reslock);
910	pthread_mutex_unlock (&reqlock);
911	}
912
913	static void atfork_child (void)
914	{
915	aio_req prv;
916
917	started = 0;
918
919	while (reqs)
920	{
921	prv = reqs;
922	reqs = prv->next;
923	req_free (prv);
924	}
925
926	reqs = reqe = 0;
927
928	while (ress)
929	{
930	prv = ress;
931	ress = prv->next;
932	req_free (prv);
933	}
934
935	ress = rese = 0;
936
937	close (respipe [0]);
938	close (respipe [1]);
939	create_pipe ();
940
941	atfork_parent ();
942	}	682	}
943		683
944	#define dREQ \	684	#define dREQ \
		685	SV *cb_cv; \
945	aio_req req; \	686	aio_req req; \
946	int req_pri = next_pri; \	687	int req_pri = next_pri; \
947	next_pri = DEFAULT_PRI + PRI_BIAS; \	688	next_pri = EIO_PRI_DEFAULT; \
948	\	689	\
949	if (SvOK (callback) && !SvROK (callback)) \	690	cb_cv = get_cb (callback); \
950	croak ("callback must be undef or of reference type"); \
951	\	691	\
952	Newz (0, req, 1, aio_cb); \	692	Newz (0, req, 1, eio_req); \
953	if (!req) \	693	if (!req) \
954	croak ("out of memory during aio_req allocation"); \	694	croak ("out of memory during eio_req allocation"); \
955	\	695	\
956	req->callback = newSVsv (callback); \	696	req->callback = SvREFCNT_inc (cb_cv); \
957	req->pri = req_pri	697	req->pri = req_pri
958		698
959	#define REQ_SEND \	699	#define REQ_SEND \
		700	PUTBACK; \
960	req_send (req); \	701	req_submit (req); \
		702	SPAGAIN; \
961	\	703	\
962	if (GIMME_V != G_VOID) \	704	if (GIMME_V != G_VOID) \
963	XPUSHs (req_sv (req, AIO_REQ_KLASS));	705	XPUSHs (req_sv (req, aio_req_stash));
964		706
965	MODULE = IO::AIO PACKAGE = IO::AIO	707	MODULE = IO::AIO PACKAGE = IO::AIO
966		708
967	PROTOTYPES: ENABLE	709	PROTOTYPES: ENABLE
968		710
969	BOOT:	711	BOOT:
970	{	712	{
		713	static const struct {
		714	const char *name;
		715	IV iv;
		716	} *civ, const_iv[] = {
		717	# define const_niv(name, value) { # name, (IV) value },
		718	# define const_iv(name) { # name, (IV) name },
		719	# define const_eio(name) { # name, (IV) EIO_ ## name },
		720	const_iv (EXDEV)
		721	const_iv (ENOSYS)
		722	const_iv (O_RDONLY)
		723	const_iv (O_WRONLY)
		724	const_iv (O_RDWR)
		725	const_iv (O_CREAT)
		726	const_iv (O_TRUNC)
		727	const_iv (O_EXCL)
		728	const_iv (O_APPEND)
		729	#ifndef _WIN32
		730	const_iv (S_IFIFO)
		731	#endif
		732	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		733	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		734	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		735	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		736	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		737	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		738
		739	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		740	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		741	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		742	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		743	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		744
		745	const_iv (ST_RDONLY)
		746	const_iv (ST_NOSUID)
		747	const_iv (ST_NODEV)
		748	const_iv (ST_NOEXEC)
		749	const_iv (ST_SYNCHRONOUS)
		750	const_iv (ST_MANDLOCK)
		751	const_iv (ST_WRITE)
		752	const_iv (ST_APPEND)
		753	const_iv (ST_IMMUTABLE)
		754	const_iv (ST_NOATIME)
		755	const_iv (ST_NODIRATIME)
		756	const_iv (ST_RELATIME)
		757
		758	const_iv (PROT_NONE)
		759	const_iv (PROT_EXEC)
		760	const_iv (PROT_READ)
		761	const_iv (PROT_WRITE)
		762
		763	/*const_iv (MAP_FIXED)*/
		764	const_iv (MAP_PRIVATE)
		765	const_iv (MAP_SHARED)
		766	const_iv (MAP_ANONYMOUS)
		767
		768	/* linuxish */
		769	const_iv (MAP_HUGETLB)
		770	const_iv (MAP_LOCKED)
		771	const_iv (MAP_NORESERVE)
		772	const_iv (MAP_POPULATE)
		773	const_iv (MAP_NONBLOCK)
		774
		775	const_eio (MCL_FUTURE)
		776	const_eio (MCL_CURRENT)
		777
		778	const_eio (MS_ASYNC)
		779	const_eio (MS_INVALIDATE)
		780	const_eio (MS_SYNC)
		781
		782	const_eio (MT_MODIFY)
		783
		784	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		785	const_eio (SYNC_FILE_RANGE_WRITE)
		786	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		787
		788	const_eio (READDIR_DENTS)
		789	const_eio (READDIR_DIRS_FIRST)
		790	const_eio (READDIR_STAT_ORDER)
		791	const_eio (READDIR_FOUND_UNKNOWN)
		792
		793	const_eio (DT_UNKNOWN)
		794	const_eio (DT_FIFO)
		795	const_eio (DT_CHR)
		796	const_eio (DT_DIR)
		797	const_eio (DT_BLK)
		798	const_eio (DT_REG)
		799	const_eio (DT_LNK)
		800	const_eio (DT_SOCK)
		801	const_eio (DT_WHT)
		802	};
		803
971	HV *stash = gv_stashpv ("IO::AIO", 1);	804	aio_stash = gv_stashpv ("IO::AIO" , 1);
972	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	805	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
973	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	806	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
974	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
975		807
		808	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		809	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		810
		811	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		812
976	create_pipe ();	813	create_respipe ();
977	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
978	}
979		814
		815	if (eio_init (want_poll, done_poll) < 0)
		816	croak ("IO::AIO: unable to initialise eio library");
		817
		818	/* atfork child called in fifo order, so before eio's handler */
		819	X_THREAD_ATFORK (0, 0, atfork_child);
		820	}
		821
980	void	822	void
981	min_parallel (nthreads)	823	max_poll_reqs (int nreqs)
982	int nthreads
983	PROTOTYPE: $	824	PROTOTYPE: $
		825	CODE:
		826	eio_set_max_poll_reqs (nreqs);
984		827
985	void	828	void
986	max_parallel (nthreads)	829	max_poll_time (double nseconds)
987	int nthreads
988	PROTOTYPE: $	830	PROTOTYPE: $
989
990	int
991	max_outstanding (nreqs)
992	int nreqs
993	PROTOTYPE: $
994	CODE:	831	CODE:
995	RETVAL = max_outstanding;	832	eio_set_max_poll_time (nseconds);
		833
		834	void
		835	min_parallel (int nthreads)
		836	PROTOTYPE: $
		837	CODE:
		838	eio_set_min_parallel (nthreads);
		839
		840	void
		841	max_parallel (int nthreads)
		842	PROTOTYPE: $
		843	CODE:
		844	eio_set_max_parallel (nthreads);
		845
		846	void
		847	max_idle (int nthreads)
		848	PROTOTYPE: $
		849	CODE:
		850	eio_set_max_idle (nthreads);
		851
		852	void
		853	max_outstanding (int maxreqs)
		854	PROTOTYPE: $
		855	CODE:
996	max_outstanding = nreqs;	856	max_outstanding = maxreqs;
997		857
998	void	858	void
999	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	859	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1000	SV * pathname
1001	int flags
1002	int mode
1003	SV * callback
1004	PROTOTYPE: $$$;$
1005	PPCODE:	860	PPCODE:
1006	{	861	{
1007	dREQ;	862	dREQ;
1008		863
1009	req->type = REQ_OPEN;	864	req->type = EIO_OPEN;
1010	req->data = newSVsv (pathname);	865	req->sv1 = newSVsv (pathname);
1011	req->dataptr = SvPVbyte_nolen (req->data);	866	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->fd = flags;	867	req->int1 = flags;
1013	req->mode = mode;	868	req->int2 = mode;
1014		869
1015	REQ_SEND;	870	REQ_SEND;
1016	}	871	}
1017		872
1018	void	873	void
1019	aio_close (fh,callback=&PL_sv_undef)	874	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1020	SV * fh
1021	SV * callback
1022	PROTOTYPE: $;$
1023	ALIAS:	875	ALIAS:
1024	aio_close = REQ_CLOSE
1025	aio_fsync = REQ_FSYNC	876	aio_fsync = EIO_FSYNC
1026	aio_fdatasync = REQ_FDATASYNC	877	aio_fdatasync = EIO_FDATASYNC
1027	PPCODE:	878	PPCODE:
1028	{	879	{
		880	int fd = s_fileno_croak (fh, 0);
1029	dREQ;	881	dREQ;
1030		882
1031	req->type = ix;	883	req->type = ix;
1032	req->fh = newSVsv (fh);	884	req->sv1 = newSVsv (fh);
1033	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	885	req->int1 = fd;
1034		886
1035	REQ_SEND (req);	887	REQ_SEND (req);
1036	}	888	}
1037		889
1038	void	890	void
		891	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		892	PPCODE:
		893	{
		894	int fd = s_fileno_croak (fh, 0);
		895	dREQ;
		896
		897	req->type = EIO_SYNC_FILE_RANGE;
		898	req->sv1 = newSVsv (fh);
		899	req->int1 = fd;
		900	req->offs = offset;
		901	req->size = nbytes;
		902	req->int2 = flags;
		903
		904	REQ_SEND (req);
		905	}
		906
		907	void
		908	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		912	int fd = s_fileno_croak (fh, 0);
		913	dREQ;
		914
		915	if (close_pipe < 0)
		916	{
		917	int pipefd [2];
		918
		919	if (pipe (pipefd) < 0
		920	|| close (pipefd [1]) < 0
		921	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		922	abort (); /*D*/
		923
		924	close_pipe = pipefd [0];
		925	}
		926
		927	req->type = EIO_DUP2;
		928	req->int1 = close_pipe;
		929	req->sv2 = newSVsv (fh);
		930	req->int2 = fd;
		931
		932	REQ_SEND (req);
		933	}
		934
		935	void
1039	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	936	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1040	SV * fh
1041	UV offset
1042	UV length
1043	SV * data
1044	UV dataoffset
1045	SV * callback
1046	ALIAS:	937	ALIAS:
1047	aio_read = REQ_READ	938	aio_read = EIO_READ
1048	aio_write = REQ_WRITE	939	aio_write = EIO_WRITE
1049	PROTOTYPE: $$$$$;$
1050	PPCODE:	940	PPCODE:
1051	{	941	{
1052	aio_req req;
1053	STRLEN svlen;	942	STRLEN svlen;
		943	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1054	char *svptr = SvPVbyte (data, svlen);	944	char *svptr = SvPVbyte (data, svlen);
1055		945	UV len = SvUV (length);
1056	SvUPGRADE (data, SVt_PV);
1057	SvPOK_on (data);
1058		946
1059	if (dataoffset < 0)	947	if (dataoffset < 0)
1060	dataoffset += svlen;	948	dataoffset += svlen;
1061		949
1062	if (dataoffset < 0 || dataoffset > svlen)	950	if (dataoffset < 0 || dataoffset > svlen)
1063	croak ("data offset outside of string");	951	croak ("dataoffset outside of data scalar");
1064		952
1065	if (ix == REQ_WRITE)	953	if (ix == EIO_WRITE)
1066	{	954	{
1067	/* write: check length and adjust. */	955	/* write: check length and adjust. */
1068	if (length < 0 || length + dataoffset > svlen)	956	if (!SvOK (length) || len + dataoffset > svlen)
1069	length = svlen - dataoffset;	957	len = svlen - dataoffset;
1070	}	958	}
1071	else	959	else
1072	{	960	{
1073	/* read: grow scalar as necessary */	961	/* read: check type and grow scalar as necessary */
		962	SvUPGRADE (data, SVt_PV);
1074	svptr = SvGROW (data, length + dataoffset);	963	svptr = SvGROW (data, len + dataoffset + 1);
1075	}	964	}
1076
1077	if (length < 0)
1078	croak ("length must not be negative");
1079		965
1080	{	966	{
1081	dREQ;	967	dREQ;
1082		968
1083	req->type = ix;	969	req->type = ix;
1084	req->fh = newSVsv (fh);	970	req->sv1 = newSVsv (fh);
1085	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	971	req->int1 = fd;
1086	: IoOFP (sv_2io (fh)));	972	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1087	req->offset = offset;	973	req->size = len;
1088	req->length = length;
1089	req->data = SvREFCNT_inc (data);	974	req->sv2 = SvREFCNT_inc (data);
1090	req->dataptr = (char *)svptr + dataoffset;	975	req->ptr2 = (char *)svptr + dataoffset;
		976	req->stroffset = dataoffset;
1091		977
1092	if (!SvREADONLY (data))	978	if (!SvREADONLY (data))
1093	{	979	{
1094	SvREADONLY_on (data);	980	SvREADONLY_on (data);
1095	req->data2ptr = (void *)data;	981	req->flags |= FLAG_SV2_RO_OFF;
1096	}	982	}
1097		983
1098	REQ_SEND;	984	REQ_SEND;
1099	}	985	}
1100	}	986	}
1101		987
1102	void	988	void
1103	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	989	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1104	SV * out_fh
1105	SV * in_fh
1106	UV in_offset
1107	UV length
1108	SV * callback
1109	PROTOTYPE: $$$$;$
1110	PPCODE:	990	PPCODE:
1111	{	991	{
		992	SV *data;
		993	dREQ;
		994
		995	req->type = EIO_READLINK;
		996	req->sv1 = newSVsv (path);
		997	req->ptr1 = SvPVbyte_nolen (req->sv1);
		998
		999	REQ_SEND;
		1000	}
		1001
		1002	void
		1003	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1004	PPCODE:
		1005	{
		1006	int ifd = s_fileno_croak (in_fh , 0);
		1007	int ofd = s_fileno_croak (out_fh, 1);
1112	dREQ;	1008	dREQ;
1113		1009
1114	req->type = REQ_SENDFILE;	1010	req->type = EIO_SENDFILE;
1115	req->fh = newSVsv (out_fh);	1011	req->sv1 = newSVsv (out_fh);
1116	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1012	req->int1 = ofd;
1117	req->fh2 = newSVsv (in_fh);	1013	req->sv2 = newSVsv (in_fh);
1118	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1014	req->int2 = ifd;
1119	req->offset = in_offset;	1015	req->offs = in_offset;
1120	req->length = length;	1016	req->size = length;
1121		1017
1122	REQ_SEND;	1018	REQ_SEND;
1123	}	1019	}
1124		1020
1125	void	1021	void
1126	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1022	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1127	SV * fh
1128	UV offset
1129	IV length
1130	SV * callback
1131	PROTOTYPE: $$$;$
1132	PPCODE:	1023	PPCODE:
1133	{	1024	{
		1025	int fd = s_fileno_croak (fh, 0);
1134	dREQ;	1026	dREQ;
1135		1027
1136	req->type = REQ_READAHEAD;	1028	req->type = EIO_READAHEAD;
1137	req->fh = newSVsv (fh);	1029	req->sv1 = newSVsv (fh);
1138	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1030	req->int1 = fd;
1139	req->offset = offset;	1031	req->offs = offset;
1140	req->length = length;	1032	req->size = length;
1141		1033
1142	REQ_SEND;	1034	REQ_SEND;
1143	}	1035	}
1144		1036
1145	void	1037	void
1146	aio_stat (fh_or_path,callback=&PL_sv_undef)	1038	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1147	SV * fh_or_path
1148	SV * callback
1149	ALIAS:	1039	ALIAS:
1150	aio_stat = REQ_STAT	1040	aio_stat = EIO_STAT
1151	aio_lstat = REQ_LSTAT	1041	aio_lstat = EIO_LSTAT
		1042	aio_statvfs = EIO_STATVFS
1152	PPCODE:	1043	PPCODE:
1153	{	1044	{
1154	dREQ;	1045	dREQ;
1155		1046
1156	New (0, req->statdata, 1, Stat_t);	1047	req->sv1 = newSVsv (fh_or_path);
1157	if (!req->statdata)
1158	{
1159	req_free (req);
1160	croak ("out of memory during aio_req->statdata allocation");
1161	}
1162		1048
1163	if (SvPOK (fh_or_path))	1049	if (SvPOK (req->sv1))
1164	{	1050	{
1165	req->type = ix;	1051	req->type = ix;
1166	req->data = newSVsv (fh_or_path);
1167	req->dataptr = SvPVbyte_nolen (req->data);	1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1168	}	1053	}
1169	else	1054	else
1170	{	1055	{
1171	req->type = REQ_FSTAT;	1056	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1172	req->fh = newSVsv (fh_or_path);
1173	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1057	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1174	}	1058	}
1175		1059
1176	REQ_SEND;	1060	REQ_SEND;
1177	}	1061	}
1178		1062
1179	void	1063	void
		1064	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1065	PPCODE:
		1066	{
		1067	dREQ;
		1068
		1069	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1070	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1071	req->sv1 = newSVsv (fh_or_path);
		1072
		1073	if (SvPOK (req->sv1))
		1074	{
		1075	req->type = EIO_UTIME;
		1076	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1077	}
		1078	else
		1079	{
		1080	req->type = EIO_FUTIME;
		1081	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1082	}
		1083
		1084	REQ_SEND;
		1085	}
		1086
		1087	void
		1088	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1089	PPCODE:
		1090	{
		1091	dREQ;
		1092
		1093	req->sv1 = newSVsv (fh_or_path);
		1094	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1095
		1096	if (SvPOK (req->sv1))
		1097	{
		1098	req->type = EIO_TRUNCATE;
		1099	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1100	}
		1101	else
		1102	{
		1103	req->type = EIO_FTRUNCATE;
		1104	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1105	}
		1106
		1107	REQ_SEND;
		1108	}
		1109
		1110	void
		1111	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1112	ALIAS:
		1113	aio_chmod = EIO_CHMOD
		1114	aio_mkdir = EIO_MKDIR
		1115	PPCODE:
		1116	{
		1117	dREQ;
		1118
		1119	req->int2 = mode;
		1120	req->sv1 = newSVsv (fh_or_path);
		1121
		1122	if (SvPOK (req->sv1))
		1123	{
		1124	req->type = ix;
		1125	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1126	}
		1127	else
		1128	{
		1129	req->type = EIO_FCHMOD;
		1130	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1131	}
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
		1137	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1138	PPCODE:
		1139	{
		1140	dREQ;
		1141
		1142	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1143	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1144	req->sv1 = newSVsv (fh_or_path);
		1145
		1146	if (SvPOK (req->sv1))
		1147	{
		1148	req->type = EIO_CHOWN;
		1149	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1150	}
		1151	else
		1152	{
		1153	req->type = EIO_FCHOWN;
		1154	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1155	}
		1156
		1157	REQ_SEND;
		1158	}
		1159
		1160	void
		1161	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1162	PPCODE:
		1163	{
		1164	dREQ;
		1165
		1166	req->type = EIO_READDIR;
		1167	req->sv1 = newSVsv (pathname);
		1168	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1169	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1170
		1171	if (flags & EIO_READDIR_DENTS)
		1172	req->int1 |= EIO_READDIR_CUSTOM2;
		1173
		1174	REQ_SEND;
		1175	}
		1176
		1177	void
1180	aio_unlink (pathname,callback=&PL_sv_undef)	1178	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1181	SV * pathname
1182	SV * callback
1183	ALIAS:	1179	ALIAS:
1184	aio_unlink = REQ_UNLINK	1180	aio_unlink = EIO_UNLINK
1185	aio_rmdir = REQ_RMDIR	1181	aio_rmdir = EIO_RMDIR
1186	aio_readdir = REQ_READDIR	1182	aio_readdir = EIO_READDIR
1187	PPCODE:	1183	PPCODE:
1188	{	1184	{
1189	dREQ;	1185	dREQ;
1190		1186
1191	req->type = ix;	1187	req->type = ix;
1192	req->data = newSVsv (pathname);	1188	req->sv1 = newSVsv (pathname);
1193	req->dataptr = SvPVbyte_nolen (req->data);	1189	req->ptr1 = SvPVbyte_nolen (req->sv1);
1194		1190
1195	REQ_SEND;	1191	REQ_SEND;
1196	}	1192	}
1197		1193
1198	void	1194	void
1199	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1195	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1200	SV * oldpath
1201	SV * newpath
1202	SV * callback
1203	ALIAS:	1196	ALIAS:
1204	aio_link = REQ_LINK	1197	aio_link = EIO_LINK
1205	aio_symlink = REQ_SYMLINK	1198	aio_symlink = EIO_SYMLINK
1206	aio_rename = REQ_RENAME	1199	aio_rename = EIO_RENAME
1207	PPCODE:	1200	PPCODE:
1208	{	1201	{
1209	dREQ;	1202	dREQ;
1210		1203
1211	req->type = ix;	1204	req->type = ix;
1212	req->fh = newSVsv (oldpath);	1205	req->sv1 = newSVsv (oldpath);
1213	req->data2ptr = SvPVbyte_nolen (req->fh);	1206	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	req->data = newSVsv (newpath);	1207	req->sv2 = newSVsv (newpath);
1215	req->dataptr = SvPVbyte_nolen (req->data);	1208	req->ptr2 = SvPVbyte_nolen (req->sv2);
1216		1209
1217	REQ_SEND;	1210	REQ_SEND;
1218	}	1211	}
1219		1212
1220	void	1213	void
1221	aio_sleep (delay,callback=&PL_sv_undef)	1214	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1222	double delay
1223	SV * callback
1224	PPCODE:	1215	PPCODE:
1225	{	1216	{
1226	dREQ;	1217	dREQ;
1227		1218
1228	req->type = REQ_SLEEP;	1219	req->type = EIO_MKNOD;
1229	req->fd = delay < 0. ? 0 : delay;	1220	req->sv1 = newSVsv (pathname);
1230	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1221	req->ptr1 = SvPVbyte_nolen (req->sv1);
1231		1222	req->int2 = (mode_t)mode;
		1223	req->offs = dev;
		1224
1232	REQ_SEND;	1225	REQ_SEND;
1233	}	1226	}
1234		1227
1235	void	1228	void
1236	aio_group (callback=&PL_sv_undef)	1229	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1237	SV * callback	1230	ALIAS:
1238	PROTOTYPE: ;$	1231	aio_mtouch = EIO_MTOUCH
		1232	aio_msync = EIO_MSYNC
1239	PPCODE:	1233	PPCODE:
1240	{	1234	{
		1235	STRLEN svlen;
		1236	char *svptr = SvPVbyte (data, svlen);
		1237	UV len = SvUV (length);
		1238
		1239	if (offset < 0)
		1240	offset += svlen;
		1241
		1242	if (offset < 0 || offset > svlen)
		1243	croak ("offset outside of scalar");
		1244
		1245	if (!SvOK (length) || len + offset > svlen)
		1246	len = svlen - offset;
		1247
		1248	{
		1249	dREQ;
		1250
		1251	req->type = ix;
		1252	req->sv2 = SvREFCNT_inc (data);
		1253	req->ptr2 = (char *)svptr + offset;
		1254	req->size = len;
		1255	req->int1 = flags;
		1256
		1257	REQ_SEND;
		1258	}
		1259	}
		1260
		1261	void
		1262	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1263	PPCODE:
		1264	{
		1265	STRLEN svlen;
		1266	char *svptr = SvPVbyte (data, svlen);
		1267	UV len = SvUV (length);
		1268
		1269	if (offset < 0)
		1270	offset += svlen;
		1271
		1272	if (offset < 0 || offset > svlen)
		1273	croak ("offset outside of scalar");
		1274
		1275	if (!SvOK (length) || len + offset > svlen)
		1276	len = svlen - offset;
		1277
		1278	{
		1279	dREQ;
		1280
		1281	req->type = EIO_MLOCK;
		1282	req->sv2 = SvREFCNT_inc (data);
		1283	req->ptr2 = (char *)svptr + offset;
		1284	req->size = len;
		1285
		1286	REQ_SEND;
		1287	}
		1288	}
		1289
		1290	void
		1291	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1292	PPCODE:
		1293	{
		1294	dREQ;
		1295
		1296	req->type = EIO_MLOCKALL;
		1297	req->int1 = flags;
		1298
		1299	REQ_SEND;
		1300	}
		1301
		1302	void
		1303	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1304	PPCODE:
		1305	{
1241	dREQ;	1306	dREQ;
1242		1307
		1308	req->type = EIO_BUSY;
		1309	req->nv1 = delay < 0. ? 0. : delay;
		1310
		1311	REQ_SEND;
		1312	}
		1313
		1314	void
		1315	aio_group (SV *callback=&PL_sv_undef)
		1316	PPCODE:
		1317	{
		1318	dREQ;
		1319
1243	req->type = REQ_GROUP;	1320	req->type = EIO_GROUP;
		1321
1244	req_send (req);	1322	req_submit (req);
1245
1246	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1323	XPUSHs (req_sv (req, aio_grp_stash));
1247	}	1324	}
1248		1325
1249	void	1326	void
1250	aio_nop (callback=&PL_sv_undef)	1327	aio_nop (SV *callback=&PL_sv_undef)
1251	SV * callback	1328	ALIAS:
		1329	aio_nop = EIO_NOP
		1330	aio_sync = EIO_SYNC
1252	PPCODE:	1331	PPCODE:
1253	{	1332	{
1254	dREQ;	1333	dREQ;
1255		1334
1256	req->type = REQ_NOP;	1335	req->type = ix;
1257		1336
1258	REQ_SEND;	1337	REQ_SEND;
1259	}	1338	}
1260		1339
1261	#if 0	1340	int
1262		1341	aioreq_pri (int pri = 0)
1263	void
1264	aio_pri (int pri = DEFAULT_PRI)
1265	CODE:	1342	CODE:
		1343	RETVAL = next_pri;
		1344	if (items > 0)
		1345	{
1266	if (pri < PRI_MIN) pri = PRI_MIN;	1346	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1267	if (pri > PRI_MAX) pri = PRI_MAX;	1347	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1268	next_pri = pri + PRI_BIAS;	1348	next_pri = pri;
		1349	}
		1350	OUTPUT:
		1351	RETVAL
1269		1352
1270	#endif	1353	void
		1354	aioreq_nice (int nice = 0)
		1355	CODE:
		1356	nice = next_pri - nice;
		1357	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1358	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1359	next_pri = nice;
1271		1360
1272	void	1361	void
1273	flush ()	1362	flush ()
1274	PROTOTYPE:
1275	CODE:	1363	CODE:
1276	while (nreqs)	1364	while (eio_nreqs ())
1277	{	1365	{
1278	poll_wait ();	1366	poll_wait ();
1279	poll_cb ();	1367	poll_cb ();
1280	}	1368	}
1281		1369
1282	void	1370	int
1283	poll()	1371	poll ()
1284	PROTOTYPE:
1285	CODE:	1372	CODE:
1286	if (nreqs)
1287	{
1288	poll_wait ();	1373	poll_wait ();
1289	poll_cb ();	1374	RETVAL = poll_cb ();
1290	}
1291
1292	int
1293	poll_fileno()
1294	PROTOTYPE:
1295	CODE:
1296	RETVAL = respipe [0];
1297	OUTPUT:	1375	OUTPUT:
1298	RETVAL	1376	RETVAL
1299		1377
1300	int	1378	int
		1379	poll_fileno ()
		1380	CODE:
		1381	RETVAL = s_epipe_fd (&respipe);
		1382	OUTPUT:
		1383	RETVAL
		1384
		1385	int
1301	poll_cb(...)	1386	poll_cb (...)
1302	PROTOTYPE:	1387	PROTOTYPE:
1303	CODE:	1388	CODE:
1304	RETVAL = poll_cb ();	1389	RETVAL = poll_cb ();
1305	OUTPUT:	1390	OUTPUT:
1306	RETVAL	1391	RETVAL
1307		1392
1308	void	1393	void
1309	poll_wait()	1394	poll_wait ()
1310	PROTOTYPE:
1311	CODE:	1395	CODE:
1312	if (nreqs)
1313	poll_wait ();	1396	poll_wait ();
1314		1397
1315	int	1398	int
1316	nreqs()	1399	nreqs ()
1317	PROTOTYPE:
1318	CODE:	1400	CODE:
1319	RETVAL = nreqs;	1401	RETVAL = eio_nreqs ();
1320	OUTPUT:	1402	OUTPUT:
1321	RETVAL	1403	RETVAL
1322		1404
		1405	int
		1406	nready ()
		1407	CODE:
		1408	RETVAL = eio_nready ();
		1409	OUTPUT:
		1410	RETVAL
		1411
		1412	int
		1413	npending ()
		1414	CODE:
		1415	RETVAL = eio_npending ();
		1416	OUTPUT:
		1417	RETVAL
		1418
		1419	int
		1420	nthreads ()
		1421	CODE:
		1422	RETVAL = eio_nthreads ();
		1423	OUTPUT:
		1424	RETVAL
		1425
		1426	int
		1427	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1428	CODE:
		1429	RETVAL = posix_fadvise (fh, offset, length, advice);
		1430	OUTPUT:
		1431	RETVAL
		1432
		1433	ssize_t
		1434	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1435	CODE:
		1436	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1437	OUTPUT:
		1438	RETVAL
		1439
		1440	void
		1441	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1442	PPCODE:
		1443	sv_unmagic (scalar, MMAP_MAGIC);
		1444	{
		1445	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1446	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1447	if (addr == (void *)-1)
		1448	XSRETURN_NO;
		1449
		1450	sv_force_normal (scalar);
		1451
		1452	/* we store the length in mg_obj, as namlen is I32 :/ */
		1453	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1454	->mg_obj = (SV *)length;
		1455
		1456	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1457
		1458	if (!(prot & PROT_WRITE))
		1459	SvREADONLY_on (scalar);
		1460
		1461	if (SvLEN (scalar))
		1462	Safefree (SvPVX (scalar));
		1463
		1464	SvPVX (scalar) = (char *)addr;
		1465	SvCUR_set (scalar, length);
		1466	SvLEN_set (scalar, 0);
		1467	SvPOK_only (scalar);
		1468
		1469	XSRETURN_YES;
		1470	}
		1471
		1472	void
		1473	munmap (SV *scalar)
		1474	CODE:
		1475	sv_unmagic (scalar, MMAP_MAGIC);
		1476
		1477	int
		1478	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1479	ALIAS:
		1480	mprotect = 1
		1481	CODE:
		1482	{
		1483	STRLEN svlen;
		1484	void *addr = SvPVbyte (scalar, svlen);
		1485	size_t len = SvUV (length);
		1486
		1487	if (offset < 0)
		1488	offset += svlen;
		1489
		1490	if (offset < 0 || offset > svlen)
		1491	croak ("offset outside of scalar");
		1492
		1493	if (!SvOK (length) || len + offset > svlen)
		1494	len = svlen - offset;
		1495
		1496	addr = (void *)(((intptr_t)addr) + offset);
		1497	eio_page_align (&addr, &len);
		1498
		1499	switch (ix)
		1500	{
		1501	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1502	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1503	}
		1504	}
		1505	OUTPUT:
		1506	RETVAL
		1507
		1508	int
		1509	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1510	CODE:
		1511	{
		1512	STRLEN svlen;
		1513	void *addr = SvPVbyte (scalar, svlen);
		1514	size_t len = SvUV (length);
		1515
		1516	if (offset < 0)
		1517	offset += svlen;
		1518
		1519	if (offset < 0 || offset > svlen)
		1520	croak ("offset outside of scalar");
		1521
		1522	if (!SvOK (length) || len + offset > svlen)
		1523	len = svlen - offset;
		1524
		1525	addr = (void *)(((intptr_t)addr) + offset);
		1526	eio_page_align (&addr, &len);
		1527	#if _POSIX_MEMLOCK
		1528	RETVAL = munlock (addr, len);
		1529	#else
		1530	RETVAL = ((errno = ENOSYS), -1);
		1531	#endif
		1532	}
		1533	OUTPUT:
		1534	RETVAL
		1535
		1536	int
		1537	munlockall ()
		1538	CODE:
		1539	#if _POSIX_MEMLOCK
		1540	munlockall ();
		1541	#else
		1542	RETVAL = -1;
		1543	errno = ENOSYS;
		1544	#endif
		1545	OUTPUT:
		1546	RETVAL
		1547
		1548	void _on_next_submit (SV *cb)
		1549	CODE:
		1550	SvREFCNT_dec (on_next_submit);
		1551	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1552
1323	PROTOTYPES: DISABLE	1553	PROTOTYPES: DISABLE
1324		1554
1325	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1555	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1326		1556
1327	void	1557	void
1328	cancel (aio_req_ornot req)	1558	cancel (aio_req_ornot req)
1329	PROTOTYPE:
1330	CODE:	1559	CODE:
1331	req_cancel (req);	1560	eio_cancel (req);
1332		1561
1333	void	1562	void
1334	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1563	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1335	CODE:	1564	PPCODE:
		1565	{
		1566	if (GIMME_V != G_VOID)
		1567	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1568
		1569	if (items > 1)
		1570	{
		1571	SV *cb_cv =get_cb (callback);
		1572
1336	SvREFCNT_dec (req->callback);	1573	SvREFCNT_dec (req->callback);
1337	req->callback = newSVsv (callback);	1574	req->callback = SvREFCNT_inc (cb_cv);
		1575	}
		1576	}
1338		1577
1339	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1578	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1340		1579
1341	void	1580	void
1342	add (aio_req grp, ...)	1581	add (aio_req grp, ...)
1343	PPCODE:	1582	PPCODE:
1344	{	1583	{
1345	int i;	1584	int i;
1346	aio_req req;
1347		1585
1348	if (grp->fd == 2)	1586	if (grp->int1 == 2)
1349	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1587	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1350		1588
1351	for (i = 1; i < items; ++i )	1589	for (i = 1; i < items; ++i )
1352	{	1590	{
		1591	aio_req req;
		1592
1353	if (GIMME_V != G_VOID)	1593	if (GIMME_V != G_VOID)
1354	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1594	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1355		1595
1356	req = SvAIO_REQ (ST (i));	1596	req = SvAIO_REQ (ST (i));
1357		1597
1358	if (req)	1598	if (req)
1359	{	1599	eio_grp_add (grp, req);
1360	++grp->length;
1361	req->grp = grp;
1362
1363	req->grp_prev = 0;
1364	req->grp_next = grp->grp_first;
1365
1366	if (grp->grp_first)
1367	grp->grp_first->grp_prev = req;
1368
1369	grp->grp_first = req;
1370	}
1371	}	1600	}
1372	}	1601	}
		1602
		1603	void
		1604	cancel_subs (aio_req_ornot req)
		1605	CODE:
		1606	req_cancel_subs (req);
1373		1607
1374	void	1608	void
1375	result (aio_req grp, ...)	1609	result (aio_req grp, ...)
1376	CODE:	1610	CODE:
1377	{	1611	{
1378	int i;	1612	int i;
		1613	AV *av;
		1614
		1615	grp->errorno = errno;
		1616
1379	AV *av = newAV ();	1617	av = newAV ();
		1618	av_extend (av, items - 1);
1380		1619
1381	for (i = 1; i < items; ++i )	1620	for (i = 1; i < items; ++i )
1382	av_push (av, newSVsv (ST (i)));	1621	av_push (av, newSVsv (ST (i)));
1383		1622
1384	SvREFCNT_dec (grp->data);	1623	SvREFCNT_dec (grp->sv1);
1385	grp->data = (SV *)av;	1624	grp->sv1 = (SV *)av;
1386	}	1625	}
1387		1626
1388	void	1627	void
		1628	errno (aio_req grp, int errorno = errno)
		1629	CODE:
		1630	grp->errorno = errorno;
		1631
		1632	void
1389	feed_limit (aio_req grp, int limit)	1633	limit (aio_req grp, int limit)
1390	CODE:	1634	CODE:
1391	grp->fd2 = limit;	1635	eio_grp_limit (grp, limit);
1392	aio_grp_feed (grp);
1393		1636
1394	void	1637	void
1395	feed (aio_req grp, SV *callback=&PL_sv_undef)	1638	feed (aio_req grp, SV *callback=&PL_sv_undef)
1396	CODE:	1639	CODE:
1397	{	1640	{
1398	SvREFCNT_dec (grp->fh2);	1641	SvREFCNT_dec (grp->sv2);
1399	grp->fh2 = newSVsv (callback);	1642	grp->sv2 = newSVsv (callback);
		1643	grp->feed = aio_grp_feed;
1400		1644
1401	if (grp->fd2 <= 0)	1645	if (grp->int2 <= 0)
1402	grp->fd2 = 2;	1646	grp->int2 = 2;
1403		1647
1404	aio_grp_feed (grp);	1648	eio_grp_limit (grp, grp->int2);
1405	}	1649	}
1406		1650

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