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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.63 by root, Mon Oct 23 23:48:31 2006 UTC vs.
Revision 1.175 by root, Wed Dec 1 04:43:12 2010 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>
		16	#include <sys/statvfs.h>
23	#include <limits.h>	17	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	18	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	19	#include <sched.h>
28		20
29	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
30	# if __linux
31	# include <sys/sendfile.h>	22	# include <sys/mman.h>
32	# elif __freebsd	23	#endif
33	# 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
34	# include <sys/uio.h>	68	# include <sys/time.h>
35	# elif __hpux
36	# include <sys/socket.h>
37	# elif __solaris /* not yet */
38	# 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
39	# else	215	# else
40	# error sendfile support requested but not available	216	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
41	# endif	217	# endif
42	#endif	218	#endif
43		219	#ifndef MAP_HUGETLB
44	/* used for struct dirent, AIX doesn't provide it */	220	# define MAP_HUGETLB 0
45	#ifndef NAME_MAX
46	# define NAME_MAX 4096
47	#endif	221	#endif
48		222	#ifndef MAP_LOCKED
49	#if __ia64	223	# define MAP_LOCKED 0
50	# define STACKSIZE 65536
51	#else
52	# define STACKSIZE 8192
53	#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)
54		243
55	enum {	244	enum {
56	REQ_QUIT,	245	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
57	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,
67	};	246	};
68		247
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	248	#include "libeio/eio.c"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		249
72	typedef struct aio_cb
73	{
74	struct aio_cb *volatile next;
75
76	SV *data, *callback;
77	SV *fh, *fh2;
78	void *dataptr, *data2ptr;
79	Stat_t *statdata;
80	off_t offset;
81	size_t length;
82	ssize_t result;
83
84	STRLEN dataoffset;
85	int type;
86	int fd, fd2;
87	int errorno;
88	mode_t mode; /* open */
89
90	unsigned char flags;
91	unsigned char pri;
92
93	SV *self; /* the perl counterpart of this request, if any */
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
95	} aio_cb;
96
97	enum {
98	FLAG_CANCELLED = 0x01,
99	};
100
101	typedef aio_cb *aio_req;	250	typedef eio_req *aio_req;
102	typedef aio_cb *aio_req_ornot;	251	typedef eio_req *aio_req_ornot;
103		252
104	enum {	253	static SV *on_next_submit;
105	PRI_MIN = -4,	254	static int next_pri = EIO_PRI_DEFAULT;
106	PRI_MAX = 4,
107
108	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,
110	};
111
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113
114	static int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;	255	static int max_outstanding;
117	static int respipe [2];
118		256
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	257	static s_epipe respipe;
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif
124		258
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	259	static void req_destroy (aio_req req);
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128
129	static volatile aio_req reqs, reqe; /* queue start, queue end */
130	static volatile aio_req ress, rese; /* queue start, queue end */
131
132	static void req_invoke (aio_req req);	260	static void req_cancel (aio_req req);
133	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	}
134		273
135	/* must be called at most once */	274	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	275	static SV *req_sv (aio_req req, HV *stash)
137	{	276	{
138	if (!req->self)	277	if (!req->self)
139	{	278	{
140	req->self = (SV *)newHV ();	279	req->self = (SV *)newHV ();
141	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	280	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
142	}	281	}
143		282
144	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	283	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
145	}	284	}
146		285
147	static aio_req SvAIO_REQ (SV *sv)	286	static aio_req SvAIO_REQ (SV *sv)
148	{	287	{
149	MAGIC *mg;	288	MAGIC *mg;
150		289
151	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")))
152	croak ("object of class " AIO_REQ_KLASS " expected");	294	croak ("object of class IO::AIO::REQ expected");
153		295
154	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	296	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
155		297
156	return mg ? (aio_req)mg->mg_ptr : 0;	298	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	299	}
158		300
159	static void aio_grp_feed (aio_req grp)	301	static void aio_grp_feed (aio_req grp)
160	{	302	{
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	303	if (grp->sv2 && SvOK (grp->sv2))
162	{	304	{
163	int old_len = grp->length;	305	dSP;
164		306
165	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))
166	{	354	{
167	dSP;	355	sv_result = sv_result_cache; sv_result_cache = 0;
168		356	SvIV_set (sv_result, req->result);
169	ENTER;
170	SAVETMPS;
171	PUSHMARK (SP);
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
173	PUTBACK;
174	call_sv (grp->fh2, G_VOID | G_EVAL);
175	SPAGAIN;
176	FREETMPS;
177	LEAVE;
178	}	357	}
179		358	else
180	/* stop if no progress has been made */
181	if (old_len == grp->length)
182	{	359	{
183	SvREFCNT_dec (grp->fh2);	360	sv_result = newSViv (req->result);
184	grp->fh2 = 0;	361	SvREADONLY_on (sv_result);
185	break;
186	}	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;
187	}	555	}
188	}
189		556
190	static void aio_grp_dec (aio_req grp)	557	return !!SvTRUE (ERRSV);
191	{
192	--grp->length;
193
194	/* call feeder, if applicable */
195	aio_grp_feed (grp);
196
197	/* finish, if done */
198	if (!grp->length && grp->fd)
199	{
200	req_invoke (grp);
201	req_free (grp);
202	}
203	}	558	}
204		559
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	pthread_mutex_lock (&reslock);
213	req = ress;
214	pthread_mutex_unlock (&reslock);
215
216	if (req)
217	return;
218
219	FD_ZERO(&rfd);
220	FD_SET(respipe [0], &rfd);
221
222	select (respipe [0] + 1, &rfd, 0, 0, 0);
223	}
224	}
225
226	static void req_invoke (aio_req req)
227	{
228	dSP;
229	int errorno = errno;
230
231	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
232	return;
233
234	errno = req->errorno;
235
236	ENTER;
237	SAVETMPS;
238	PUSHMARK (SP);
239	EXTEND (SP, 1);
240
241	switch (req->type)
242	{
243	case REQ_READDIR:
244	{
245	SV *rv = &PL_sv_undef;
246
247	if (req->result >= 0)
248	{
249	char *buf = req->data2ptr;
250	AV *av = newAV ();
251
252	while (req->result)
253	{
254	SV *sv = newSVpv (buf, 0);
255
256	av_push (av, sv);
257	buf += SvCUR (sv) + 1;
258	req->result--;
259	}
260
261	rv = sv_2mortal (newRV_noinc ((SV *)av));
262	}
263
264	PUSHs (rv);
265	}
266	break;
267
268	case REQ_OPEN:
269	{
270	/* convert fd to fh */
271	SV *fh;
272
273	PUSHs (sv_2mortal (newSViv (req->result)));
274	PUTBACK;
275	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
276	SPAGAIN;
277
278	fh = SvREFCNT_inc (POPs);
279
280	PUSHMARK (SP);
281	XPUSHs (sv_2mortal (fh));
282	}
283	break;
284
285	case REQ_GROUP:
286	req->fd = 2; /* mark group as finished */
287
288	if (req->data)
289	{
290	int i;
291	AV *av = (AV *)req->data;
292
293	EXTEND (SP, AvFILL (av) + 1);
294	for (i = 0; i <= AvFILL (av); ++i)
295	PUSHs (*av_fetch (av, i, 0));
296	}
297	break;
298
299	case REQ_NOP:
300	case REQ_SLEEP:
301	break;
302
303	default:
304	PUSHs (sv_2mortal (newSViv (req->result)));
305	break;
306	}
307
308
309	PUTBACK;
310	call_sv (req->callback, G_VOID | G_EVAL);
311	SPAGAIN;
312
313	FREETMPS;
314	LEAVE;
315
316	errno = errorno;
317
318	if (SvTRUE (ERRSV))
319	{
320	req_free (req);
321	croak (0);
322	}
323	}
324
325	static void req_free (aio_req req)	560	static void req_destroy (aio_req req)
326	{	561	{
327	if (req->grp)
328	{
329	aio_req grp = req->grp;
330
331	/* unlink request */
332	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
333	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
334
335	if (grp->grp_first == req)
336	grp->grp_first = req->grp_next;
337
338	aio_grp_dec (grp);
339	}
340
341	if (req->self)	562	if (req->self)
342	{	563	{
343	sv_unmagic (req->self, PERL_MAGIC_ext);	564	sv_unmagic (req->self, PERL_MAGIC_ext);
344	SvREFCNT_dec (req->self);	565	SvREFCNT_dec (req->self);
345	}	566	}
346		567
347	SvREFCNT_dec (req->data);
348	SvREFCNT_dec (req->fh);	568	SvREFCNT_dec (req->sv1);
349	SvREFCNT_dec (req->fh2);	569	SvREFCNT_dec (req->sv2);
350	SvREFCNT_dec (req->callback);	570	SvREFCNT_dec (req->callback);
351	Safefree (req->statdata);
352
353	if (req->type == REQ_READDIR && req->result >= 0)
354	free (req->data2ptr);
355		571
356	Safefree (req);	572	Safefree (req);
357	}	573	}
358		574
359	static void req_cancel (aio_req req)	575	static void req_cancel_subs (aio_req grp)
360	{	576	{
361	req->flags |= FLAG_CANCELLED;	577	aio_req sub;
362		578
363	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 ())
364	{	598	{
365	aio_req sub;	599	int size;
366		600
367	for (sub = req->grp_first; sub; sub = sub->grp_next)	601	X_LOCK (reslock);
368	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);
369	}	611	}
370	}	612	}
371		613
372	static int poll_cb ()	614	static int poll_cb (void)
373	{	615	{
374	dSP;
375	int count = 0;
376	int do_croak = 0;
377	aio_req req;
378
379	for (;;)	616	for (;;)
380	{	617	{
381	pthread_mutex_lock (&reslock);	618	int res = eio_poll ();
382	req = ress;
383		619
384	if (req)	620	if (res > 0)
385	{
386	ress = req->next;
387
388	if (!ress)
389	{
390	/* read any signals sent by the worker threads */
391	char buf [32];
392	while (read (respipe [0], buf, 32) == 32)
393	;
394
395	rese = 0;
396	}
397	}
398
399	pthread_mutex_unlock (&reslock);
400
401	if (!req)
402	break;	621	croak (0);
403		622
404	--nreqs;	623	if (!max_outstanding || max_outstanding > eio_nreqs ())
		624	return res;
405		625
406	if (req->type == REQ_QUIT)	626	poll_wait ();
407	started--;
408	else if (req->type == REQ_GROUP && req->length)
409	{
410	req->fd = 1; /* mark request as delayed */
411	continue;
412	}
413	else
414	{
415	if (req->type == REQ_READ)
416	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
417
418	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
419	SvREADONLY_off (req->data);
420
421	if (req->statdata)
422	{
423	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
424	PL_laststatval = req->result;
425	PL_statcache = *(req->statdata);
426	}
427
428	req_invoke (req);
429
430	count++;
431	}
432
433	req_free (req);
434	}	627	}
435
436	return count;
437	}	628	}
438		629
439	static void *aio_proc(void *arg);
440
441	static void start_thread (void)	630	static void atfork_child (void)
442	{	631	{
443	sigset_t fullsigset, oldsigset;	632	create_respipe ();
444	pthread_t tid;
445	pthread_attr_t attr;
446
447	pthread_attr_init (&attr);
448	pthread_attr_setstacksize (&attr, STACKSIZE);
449	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
450
451	sigfillset (&fullsigset);
452	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
453
454	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
455	started++;
456
457	sigprocmask (SIG_SETMASK, &oldsigset, 0);
458	}
459
460	static void req_send (aio_req req)
461	{
462	while (started < wanted && nreqs >= started)
463	start_thread ();
464
465	++nreqs;
466
467	pthread_mutex_lock (&reqlock);
468
469	req->next = 0;
470
471	if (reqe)
472	{
473	reqe->next = req;
474	reqe = req;
475	}
476	else
477	reqe = reqs = req;
478
479	pthread_cond_signal (&reqwait);
480	pthread_mutex_unlock (&reqlock);
481
482	if (nreqs > max_outstanding)
483	for (;;)
484	{
485	poll_cb ();
486
487	if (nreqs <= max_outstanding)
488	break;
489
490	poll_wait ();
491	}
492	}
493
494	static void end_thread (void)
495	{
496	aio_req req;
497	Newz (0, req, 1, aio_cb);
498	req->type = REQ_QUIT;
499
500	req_send (req);
501	}
502
503	static void min_parallel (int nthreads)
504	{
505	if (wanted < nthreads)
506	wanted = nthreads;
507	}
508
509	static void max_parallel (int nthreads)
510	{
511	int cur = started;
512
513	if (wanted > nthreads)
514	wanted = nthreads;
515
516	while (cur > wanted)
517	{
518	end_thread ();
519	cur--;
520	}
521
522	while (started > wanted)
523	{
524	poll_wait ();
525	poll_cb ();
526	}
527	}
528
529	static void create_pipe ()
530	{
531	if (pipe (respipe))
532	croak ("unable to initialize result pipe");
533
534	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
535	croak ("cannot set result pipe to nonblocking mode");
536
537	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
538	croak ("cannot set result pipe to nonblocking mode");
539	}	633	}
540		634
541	/*****************************************************************************/	635	/*****************************************************************************/
542	/* work around various missing functions */
543		636
544	#if !HAVE_PREADWRITE	637	#if !_POSIX_MAPPED_FILES
545	# define pread aio_pread	638	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
546	# define pwrite aio_pwrite	639	# define munmap(addr,length) (errno = ENOSYS, -1)
547		640	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
548	/*	641	# define PROT_NONE 0
549	* make our pread/pwrite safe against themselves, but not against	642	# define PROT_WRITE 0
550	* normal read/write by using a mutex. slows down execution a lot,	643	# define MAP_PRIVATE 0
551	* but that's your problem, not mine.	644	# define MAP_SHARED 0
552	*/	645	# define MAP_FIXED 0
553	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
554
555	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
556	{
557	ssize_t res;
558	off_t ooffset;
559
560	pthread_mutex_lock (&preadwritelock);
561	ooffset = lseek (fd, 0, SEEK_CUR);
562	lseek (fd, offset, SEEK_SET);
563	res = read (fd, buf, count);
564	lseek (fd, ooffset, SEEK_SET);
565	pthread_mutex_unlock (&preadwritelock);
566
567	return res;
568	}
569
570	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
571	{
572	ssize_t res;
573	off_t ooffset;
574
575	pthread_mutex_lock (&preadwritelock);
576	ooffset = lseek (fd, 0, SEEK_CUR);
577	lseek (fd, offset, SEEK_SET);
578	res = write (fd, buf, count);
579	lseek (fd, offset, SEEK_SET);
580	pthread_mutex_unlock (&preadwritelock);
581
582	return res;
583	}
584	#endif
585
586	#if !HAVE_FDATASYNC
587	# define fdatasync fsync
588	#endif
589
590	#if !HAVE_READAHEAD
591	# define readahead aio_readahead
592
593	static ssize_t readahead (int fd, off_t offset, size_t count)
594	{
595	char readahead_buf[4096];
596
597	while (count > 0)
598	{
599	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
600
601	pread (fd, readahead_buf, len, offset);
602	offset += len;
603	count -= len;
604	}
605
606	errno = 0;
607	}
608	#endif
609
610	#if !HAVE_READDIR_R
611	# define readdir_r aio_readdir_r
612
613	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
614
615	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
616	{
617	struct dirent *e;
618	int errorno;
619
620	pthread_mutex_lock (&readdirlock);
621
622	e = readdir (dirp);
623	errorno = errno;
624
625	if (e)
626	{
627	*res = ent;
628	strcpy (ent->d_name, e->d_name);
629	}
630	else
631	*res = 0;
632
633	pthread_mutex_unlock (&readdirlock);
634
635	errno = errorno;
636	return e ? 0 : -1;
637	}
638	#endif
639
640	/* sendfile always needs emulation */
641	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
642	{
643	ssize_t res;
644
645	if (!count)
646	return 0;
647
648	#if HAVE_SENDFILE
649	# if __linux
650	res = sendfile (ofd, ifd, &offset, count);
651
652	# elif __freebsd
653	/*
654	* Of course, the freebsd sendfile is a dire hack with no thoughts
655	* wasted on making it similar to other I/O functions.
656	*/
657	{
658	off_t sbytes;
659	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
660
661	if (res < 0 && sbytes)
662	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
663	res = sbytes;
664	}
665
666	# elif __hpux
667	res = sendfile (ofd, ifd, offset, count, 0, 0);
668
669	# elif __solaris
670	{
671	struct sendfilevec vec;
672	size_t sbytes;
673
674	vec.sfv_fd = ifd;
675	vec.sfv_flag = 0;
676	vec.sfv_off = offset;
677	vec.sfv_len = count;
678
679	res = sendfilev (ofd, &vec, 1, &sbytes);
680
681	if (res < 0 && sbytes)
682	res = sbytes;
683	}
684
685	# endif	646	#endif
686	#else
687	res = -1;
688	errno = ENOSYS;
689	#endif
690		647
691	if (res < 0	648	#define MMAP_MAGIC PERL_MAGIC_ext
692	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
693	#if __solaris
694	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
695	#endif
696	)
697	)
698	{
699	/* emulate sendfile. this is a major pain in the ass */
700	char buf[4096];
701	res = 0;
702		649
703	while (count)	650	static int
704	{	651	mmap_free (pTHX_ SV *sv, MAGIC *mg)
705	ssize_t cnt;
706
707	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
708
709	if (cnt <= 0)
710	{
711	if (cnt && !res) res = -1;
712	break;
713	}
714
715	cnt = write (ofd, buf, cnt);
716
717	if (cnt <= 0)
718	{
719	if (cnt && !res) res = -1;
720	break;
721	}
722
723	offset += cnt;
724	res += cnt;
725	count -= cnt;
726	}
727	}
728
729	return res;
730	}
731
732	/* read a full directory */
733	static int scandir_ (const char *path, void **namesp)
734	{	652	{
735	DIR *dirp = opendir (path);	653	int old_errno = errno;
736	union	654	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
737	{
738	struct dirent d;
739	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
740	} u;
741	struct dirent *entp;
742	char *name, *names;
743	int memlen = 4096;
744	int memofs = 0;
745	int res = 0;
746	int errorno;
747
748	if (!dirp)
749	return -1;
750
751	names = malloc (memlen);
752
753	for (;;)
754	{
755	errno = 0, readdir_r (dirp, &u.d, &entp);
756
757	if (!entp)
758	break;
759
760	name = entp->d_name;
761
762	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
763	{
764	int len = strlen (name) + 1;
765
766	res++;
767
768	while (memofs + len > memlen)
769	{
770	memlen *= 2;
771	names = realloc (names, memlen);
772	if (!names)
773	break;
774	}
775
776	memcpy (names + memofs, name, len);
777	memofs += len;
778	}
779	}
780
781	errorno = errno;	655	errno = old_errno;
782	closedir (dirp);
783		656
784	if (errorno)	657	mg->mg_obj = 0; /* just in case */
785	{
786	free (names);
787	errno = errorno;
788	res = -1;
789	}
790		658
791	*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
792	return res;	668	return 0;
793	}	669	}
		670
		671	static MGVTBL mmap_vtbl = {
		672	0, 0, 0, 0, mmap_free
		673	};
794		674
795	/*****************************************************************************/	675	/*****************************************************************************/
796		676
797	static void *aio_proc (void *thr_arg)	677	static SV *
		678	get_cb (SV *cb_sv)
798	{	679	{
799	aio_req req;	680	SvGETMAGIC (cb_sv);
800	int type;	681	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
801
802	do
803	{
804	pthread_mutex_lock (&reqlock);
805
806	for (;;)
807	{
808	req = reqs;
809
810	if (reqs)
811	{
812	reqs = reqs->next;
813	if (!reqs) reqe = 0;
814	}
815
816	if (req)
817	break;
818
819	pthread_cond_wait (&reqwait, &reqlock);
820	}
821
822	pthread_mutex_unlock (&reqlock);
823
824	errno = 0; /* strictly unnecessary */
825	type = req->type; /* remember type for QUIT check */
826
827	if (!(req->flags & FLAG_CANCELLED))
828	switch (type)
829	{
830	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
831	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
832
833	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
834	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
835
836	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
837	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
838	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
839
840	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
841	case REQ_CLOSE: req->result = close (req->fd); break;
842	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
843	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
844	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
845	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
846	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
847
848	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
849	case REQ_FSYNC: req->result = fsync (req->fd); break;
850	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
851
852	case REQ_SLEEP:
853	{
854	struct timeval tv;
855
856	tv.tv_sec = req->fd;
857	tv.tv_usec = req->fd2;
858
859	req->result = select (0, 0, 0, 0, &tv);
860	}
861
862	case REQ_GROUP:
863	case REQ_NOP:
864	case REQ_QUIT:
865	break;
866
867	default:
868	req->result = ENOSYS;
869	break;
870	}
871
872	req->errorno = errno;
873
874	pthread_mutex_lock (&reslock);
875
876	req->next = 0;
877
878	if (rese)
879	{
880	rese->next = req;
881	rese = req;
882	}
883	else
884	{
885	rese = ress = req;
886
887	/* write a dummy byte to the pipe so fh becomes ready */
888	write (respipe [1], &respipe, 1);
889	}
890
891	pthread_mutex_unlock (&reslock);
892	}
893	while (type != REQ_QUIT);
894
895	return 0;
896	}
897
898	/*****************************************************************************/
899
900	static void atfork_prepare (void)
901	{
902	pthread_mutex_lock (&reqlock);
903	pthread_mutex_lock (&reslock);
904	#if !HAVE_PREADWRITE
905	pthread_mutex_lock (&preadwritelock);
906	#endif
907	#if !HAVE_READDIR_R
908	pthread_mutex_lock (&readdirlock);
909	#endif
910	}
911
912	static void atfork_parent (void)
913	{
914	#if !HAVE_READDIR_R
915	pthread_mutex_unlock (&readdirlock);
916	#endif
917	#if !HAVE_PREADWRITE
918	pthread_mutex_unlock (&preadwritelock);
919	#endif
920	pthread_mutex_unlock (&reslock);
921	pthread_mutex_unlock (&reqlock);
922	}
923
924	static void atfork_child (void)
925	{
926	aio_req prv;
927
928	started = 0;
929
930	while (reqs)
931	{
932	prv = reqs;
933	reqs = prv->next;
934	req_free (prv);
935	}
936
937	reqs = reqe = 0;
938
939	while (ress)
940	{
941	prv = ress;
942	ress = prv->next;
943	req_free (prv);
944	}
945
946	ress = rese = 0;
947
948	close (respipe [0]);
949	close (respipe [1]);
950	create_pipe ();
951
952	atfork_parent ();
953	}	682	}
954		683
955	#define dREQ \	684	#define dREQ \
		685	SV *cb_cv; \
956	aio_req req; \	686	aio_req req; \
957	int req_pri = next_pri; \	687	int req_pri = next_pri; \
958	next_pri = DEFAULT_PRI + PRI_BIAS; \	688	next_pri = EIO_PRI_DEFAULT; \
959	\	689	\
960	if (SvOK (callback) && !SvROK (callback)) \	690	cb_cv = get_cb (callback); \
961	croak ("callback must be undef or of reference type"); \
962	\	691	\
963	Newz (0, req, 1, aio_cb); \	692	Newz (0, req, 1, eio_req); \
964	if (!req) \	693	if (!req) \
965	croak ("out of memory during aio_req allocation"); \	694	croak ("out of memory during eio_req allocation"); \
966	\	695	\
967	req->callback = newSVsv (callback); \	696	req->callback = SvREFCNT_inc (cb_cv); \
968	req->pri = req_pri	697	req->pri = req_pri
969		698
970	#define REQ_SEND \	699	#define REQ_SEND \
		700	PUTBACK; \
971	req_send (req); \	701	req_submit (req); \
		702	SPAGAIN; \
972	\	703	\
973	if (GIMME_V != G_VOID) \	704	if (GIMME_V != G_VOID) \
974	XPUSHs (req_sv (req, AIO_REQ_KLASS));	705	XPUSHs (req_sv (req, aio_req_stash));
975		706
976	MODULE = IO::AIO PACKAGE = IO::AIO	707	MODULE = IO::AIO PACKAGE = IO::AIO
977		708
978	PROTOTYPES: ENABLE	709	PROTOTYPES: ENABLE
979		710
980	BOOT:	711	BOOT:
981	{	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
982	HV *stash = gv_stashpv ("IO::AIO", 1);	804	aio_stash = gv_stashpv ("IO::AIO" , 1);
983	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	805	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
984	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	806	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
985	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
986		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
987	create_pipe ();	813	create_respipe ();
988	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
989	}
990		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
991	void	822	void
992	min_parallel (nthreads)	823	max_poll_reqs (int nreqs)
993	int nthreads
994	PROTOTYPE: $	824	PROTOTYPE: $
		825	CODE:
		826	eio_set_max_poll_reqs (nreqs);
995		827
996	void	828	void
997	max_parallel (nthreads)	829	max_poll_time (double nseconds)
998	int nthreads
999	PROTOTYPE: $	830	PROTOTYPE: $
1000
1001	int
1002	max_outstanding (nreqs)
1003	int nreqs
1004	PROTOTYPE: $
1005	CODE:	831	CODE:
1006	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:
1007	max_outstanding = nreqs;	856	max_outstanding = maxreqs;
1008		857
1009	void	858	void
1010	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	859	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1011	SV * pathname
1012	int flags
1013	int mode
1014	SV * callback
1015	PROTOTYPE: $$$;$
1016	PPCODE:	860	PPCODE:
1017	{	861	{
1018	dREQ;	862	dREQ;
1019		863
1020	req->type = REQ_OPEN;	864	req->type = EIO_OPEN;
1021	req->data = newSVsv (pathname);	865	req->sv1 = newSVsv (pathname);
1022	req->dataptr = SvPVbyte_nolen (req->data);	866	req->ptr1 = SvPVbyte_nolen (req->sv1);
1023	req->fd = flags;	867	req->int1 = flags;
1024	req->mode = mode;	868	req->int2 = mode;
1025		869
1026	REQ_SEND;	870	REQ_SEND;
1027	}	871	}
1028		872
1029	void	873	void
1030	aio_close (fh,callback=&PL_sv_undef)	874	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1031	SV * fh
1032	SV * callback
1033	PROTOTYPE: $;$
1034	ALIAS:	875	ALIAS:
1035	aio_close = REQ_CLOSE
1036	aio_fsync = REQ_FSYNC	876	aio_fsync = EIO_FSYNC
1037	aio_fdatasync = REQ_FDATASYNC	877	aio_fdatasync = EIO_FDATASYNC
1038	PPCODE:	878	PPCODE:
1039	{	879	{
		880	int fd = s_fileno_croak (fh, 0);
1040	dREQ;	881	dREQ;
1041		882
1042	req->type = ix;	883	req->type = ix;
1043	req->fh = newSVsv (fh);	884	req->sv1 = newSVsv (fh);
1044	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	885	req->int1 = fd;
1045		886
1046	REQ_SEND (req);	887	REQ_SEND (req);
1047	}	888	}
1048		889
1049	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
1050	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)
1051	SV * fh
1052	UV offset
1053	UV length
1054	SV * data
1055	UV dataoffset
1056	SV * callback
1057	ALIAS:	937	ALIAS:
1058	aio_read = REQ_READ	938	aio_read = EIO_READ
1059	aio_write = REQ_WRITE	939	aio_write = EIO_WRITE
1060	PROTOTYPE: $$$$$;$
1061	PPCODE:	940	PPCODE:
1062	{	941	{
1063	aio_req req;
1064	STRLEN svlen;	942	STRLEN svlen;
		943	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1065	char *svptr = SvPVbyte (data, svlen);	944	char *svptr = SvPVbyte (data, svlen);
1066		945	UV len = SvUV (length);
1067	SvUPGRADE (data, SVt_PV);
1068	SvPOK_on (data);
1069		946
1070	if (dataoffset < 0)	947	if (dataoffset < 0)
1071	dataoffset += svlen;	948	dataoffset += svlen;
1072		949
1073	if (dataoffset < 0 || dataoffset > svlen)	950	if (dataoffset < 0 || dataoffset > svlen)
1074	croak ("data offset outside of string");	951	croak ("dataoffset outside of data scalar");
1075		952
1076	if (ix == REQ_WRITE)	953	if (ix == EIO_WRITE)
1077	{	954	{
1078	/* write: check length and adjust. */	955	/* write: check length and adjust. */
1079	if (length < 0 || length + dataoffset > svlen)	956	if (!SvOK (length) || len + dataoffset > svlen)
1080	length = svlen - dataoffset;	957	len = svlen - dataoffset;
1081	}	958	}
1082	else	959	else
1083	{	960	{
1084	/* read: grow scalar as necessary */	961	/* read: check type and grow scalar as necessary */
		962	SvUPGRADE (data, SVt_PV);
1085	svptr = SvGROW (data, length + dataoffset);	963	svptr = SvGROW (data, len + dataoffset + 1);
1086	}	964	}
1087
1088	if (length < 0)
1089	croak ("length must not be negative");
1090		965
1091	{	966	{
1092	dREQ;	967	dREQ;
1093		968
1094	req->type = ix;	969	req->type = ix;
1095	req->fh = newSVsv (fh);	970	req->sv1 = newSVsv (fh);
1096	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	971	req->int1 = fd;
1097	: IoOFP (sv_2io (fh)));	972	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1098	req->offset = offset;	973	req->size = len;
1099	req->length = length;
1100	req->data = SvREFCNT_inc (data);	974	req->sv2 = SvREFCNT_inc (data);
1101	req->dataptr = (char *)svptr + dataoffset;	975	req->ptr2 = (char *)svptr + dataoffset;
		976	req->stroffset = dataoffset;
1102		977
1103	if (!SvREADONLY (data))	978	if (!SvREADONLY (data))
1104	{	979	{
1105	SvREADONLY_on (data);	980	SvREADONLY_on (data);
1106	req->data2ptr = (void *)data;	981	req->flags |= FLAG_SV2_RO_OFF;
1107	}	982	}
1108		983
1109	REQ_SEND;	984	REQ_SEND;
1110	}	985	}
1111	}	986	}
1112		987
1113	void	988	void
1114	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	989	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1115	SV * out_fh
1116	SV * in_fh
1117	UV in_offset
1118	UV length
1119	SV * callback
1120	PROTOTYPE: $$$$;$
1121	PPCODE:	990	PPCODE:
1122	{	991	{
		992	SV *data;
		993	dREQ;
		994
		995	req->type = EIO_READLINK;
		996	req->sv1 = newSVsv (path);
		997	req->ptr1 = SvPVbyte_nolen (req->sv1);
		998
		999	REQ_SEND;
		1000	}
		1001
		1002	void
		1003	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1004	PPCODE:
		1005	{
		1006	int ifd = s_fileno_croak (in_fh , 0);
		1007	int ofd = s_fileno_croak (out_fh, 1);
1123	dREQ;	1008	dREQ;
1124		1009
1125	req->type = REQ_SENDFILE;	1010	req->type = EIO_SENDFILE;
1126	req->fh = newSVsv (out_fh);	1011	req->sv1 = newSVsv (out_fh);
1127	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1012	req->int1 = ofd;
1128	req->fh2 = newSVsv (in_fh);	1013	req->sv2 = newSVsv (in_fh);
1129	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1014	req->int2 = ifd;
1130	req->offset = in_offset;	1015	req->offs = in_offset;
1131	req->length = length;	1016	req->size = length;
1132		1017
1133	REQ_SEND;	1018	REQ_SEND;
1134	}	1019	}
1135		1020
1136	void	1021	void
1137	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1022	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	UV offset
1140	IV length
1141	SV * callback
1142	PROTOTYPE: $$$;$
1143	PPCODE:	1023	PPCODE:
1144	{	1024	{
		1025	int fd = s_fileno_croak (fh, 0);
1145	dREQ;	1026	dREQ;
1146		1027
1147	req->type = REQ_READAHEAD;	1028	req->type = EIO_READAHEAD;
1148	req->fh = newSVsv (fh);	1029	req->sv1 = newSVsv (fh);
1149	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1030	req->int1 = fd;
1150	req->offset = offset;	1031	req->offs = offset;
1151	req->length = length;	1032	req->size = length;
1152		1033
1153	REQ_SEND;	1034	REQ_SEND;
1154	}	1035	}
1155		1036
1156	void	1037	void
1157	aio_stat (fh_or_path,callback=&PL_sv_undef)	1038	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1158	SV * fh_or_path
1159	SV * callback
1160	ALIAS:	1039	ALIAS:
1161	aio_stat = REQ_STAT	1040	aio_stat = EIO_STAT
1162	aio_lstat = REQ_LSTAT	1041	aio_lstat = EIO_LSTAT
		1042	aio_statvfs = EIO_STATVFS
1163	PPCODE:	1043	PPCODE:
1164	{	1044	{
1165	dREQ;	1045	dREQ;
1166		1046
1167	New (0, req->statdata, 1, Stat_t);	1047	req->sv1 = newSVsv (fh_or_path);
1168	if (!req->statdata)
1169	{
1170	req_free (req);
1171	croak ("out of memory during aio_req->statdata allocation");
1172	}
1173		1048
1174	if (SvPOK (fh_or_path))	1049	if (SvPOK (req->sv1))
1175	{	1050	{
1176	req->type = ix;	1051	req->type = ix;
1177	req->data = newSVsv (fh_or_path);
1178	req->dataptr = SvPVbyte_nolen (req->data);	1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1179	}	1053	}
1180	else	1054	else
1181	{	1055	{
1182	req->type = REQ_FSTAT;	1056	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1183	req->fh = newSVsv (fh_or_path);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1057	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1185	}	1058	}
1186		1059
1187	REQ_SEND;	1060	REQ_SEND;
1188	}	1061	}
1189		1062
1190	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
1191	aio_unlink (pathname,callback=&PL_sv_undef)	1178	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1192	SV * pathname
1193	SV * callback
1194	ALIAS:	1179	ALIAS:
1195	aio_unlink = REQ_UNLINK	1180	aio_unlink = EIO_UNLINK
1196	aio_rmdir = REQ_RMDIR	1181	aio_rmdir = EIO_RMDIR
1197	aio_readdir = REQ_READDIR	1182	aio_readdir = EIO_READDIR
1198	PPCODE:	1183	PPCODE:
1199	{	1184	{
1200	dREQ;	1185	dREQ;
1201		1186
1202	req->type = ix;	1187	req->type = ix;
1203	req->data = newSVsv (pathname);	1188	req->sv1 = newSVsv (pathname);
1204	req->dataptr = SvPVbyte_nolen (req->data);	1189	req->ptr1 = SvPVbyte_nolen (req->sv1);
1205		1190
1206	REQ_SEND;	1191	REQ_SEND;
1207	}	1192	}
1208		1193
1209	void	1194	void
1210	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1195	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1211	SV * oldpath
1212	SV * newpath
1213	SV * callback
1214	ALIAS:	1196	ALIAS:
1215	aio_link = REQ_LINK	1197	aio_link = EIO_LINK
1216	aio_symlink = REQ_SYMLINK	1198	aio_symlink = EIO_SYMLINK
1217	aio_rename = REQ_RENAME	1199	aio_rename = EIO_RENAME
1218	PPCODE:	1200	PPCODE:
1219	{	1201	{
1220	dREQ;	1202	dREQ;
1221		1203
1222	req->type = ix;	1204	req->type = ix;
1223	req->fh = newSVsv (oldpath);	1205	req->sv1 = newSVsv (oldpath);
1224	req->data2ptr = SvPVbyte_nolen (req->fh);	1206	req->ptr1 = SvPVbyte_nolen (req->sv1);
1225	req->data = newSVsv (newpath);	1207	req->sv2 = newSVsv (newpath);
1226	req->dataptr = SvPVbyte_nolen (req->data);	1208	req->ptr2 = SvPVbyte_nolen (req->sv2);
1227		1209
1228	REQ_SEND;	1210	REQ_SEND;
1229	}	1211	}
1230		1212
1231	void	1213	void
1232	aio_sleep (delay,callback=&PL_sv_undef)	1214	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1233	double delay
1234	SV * callback
1235	PPCODE:	1215	PPCODE:
1236	{	1216	{
1237	dREQ;	1217	dREQ;
1238		1218
1239	req->type = REQ_SLEEP;	1219	req->type = EIO_MKNOD;
1240	req->fd = delay < 0. ? 0 : delay;	1220	req->sv1 = newSVsv (pathname);
1241	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1221	req->ptr1 = SvPVbyte_nolen (req->sv1);
1242		1222	req->int2 = (mode_t)mode;
		1223	req->offs = dev;
		1224
1243	REQ_SEND;	1225	REQ_SEND;
1244	}	1226	}
1245		1227
1246	void	1228	void
1247	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)
1248	SV * callback	1230	ALIAS:
1249	PROTOTYPE: ;$	1231	aio_mtouch = EIO_MTOUCH
		1232	aio_msync = EIO_MSYNC
1250	PPCODE:	1233	PPCODE:
1251	{	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	{
1252	dREQ;	1306	dREQ;
1253		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
1254	req->type = REQ_GROUP;	1320	req->type = EIO_GROUP;
		1321
1255	req_send (req);	1322	req_submit (req);
1256
1257	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1323	XPUSHs (req_sv (req, aio_grp_stash));
1258	}	1324	}
1259		1325
1260	void	1326	void
1261	aio_nop (callback=&PL_sv_undef)	1327	aio_nop (SV *callback=&PL_sv_undef)
1262	SV * callback	1328	ALIAS:
		1329	aio_nop = EIO_NOP
		1330	aio_sync = EIO_SYNC
1263	PPCODE:	1331	PPCODE:
1264	{	1332	{
1265	dREQ;	1333	dREQ;
1266		1334
1267	req->type = REQ_NOP;	1335	req->type = ix;
1268		1336
1269	REQ_SEND;	1337	REQ_SEND;
1270	}	1338	}
1271		1339
1272	#if 0	1340	int
1273		1341	aioreq_pri (int pri = 0)
1274	void
1275	aio_pri (int pri = DEFAULT_PRI)
1276	CODE:	1342	CODE:
		1343	RETVAL = next_pri;
		1344	if (items > 0)
		1345	{
1277	if (pri < PRI_MIN) pri = PRI_MIN;	1346	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1278	if (pri > PRI_MAX) pri = PRI_MAX;	1347	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1279	next_pri = pri + PRI_BIAS;	1348	next_pri = pri;
		1349	}
		1350	OUTPUT:
		1351	RETVAL
1280		1352
1281	#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;
1282		1360
1283	void	1361	void
1284	flush ()	1362	flush ()
1285	PROTOTYPE:
1286	CODE:	1363	CODE:
1287	while (nreqs)	1364	while (eio_nreqs ())
1288	{	1365	{
1289	poll_wait ();	1366	poll_wait ();
1290	poll_cb ();	1367	poll_cb ();
1291	}	1368	}
1292		1369
1293	void	1370	int
1294	poll()	1371	poll ()
1295	PROTOTYPE:
1296	CODE:	1372	CODE:
1297	if (nreqs)
1298	{
1299	poll_wait ();	1373	poll_wait ();
1300	poll_cb ();	1374	RETVAL = poll_cb ();
1301	}
1302
1303	int
1304	poll_fileno()
1305	PROTOTYPE:
1306	CODE:
1307	RETVAL = respipe [0];
1308	OUTPUT:	1375	OUTPUT:
1309	RETVAL	1376	RETVAL
1310		1377
1311	int	1378	int
		1379	poll_fileno ()
		1380	CODE:
		1381	RETVAL = s_epipe_fd (&respipe);
		1382	OUTPUT:
		1383	RETVAL
		1384
		1385	int
1312	poll_cb(...)	1386	poll_cb (...)
1313	PROTOTYPE:	1387	PROTOTYPE:
1314	CODE:	1388	CODE:
1315	RETVAL = poll_cb ();	1389	RETVAL = poll_cb ();
1316	OUTPUT:	1390	OUTPUT:
1317	RETVAL	1391	RETVAL
1318		1392
1319	void	1393	void
1320	poll_wait()	1394	poll_wait ()
1321	PROTOTYPE:
1322	CODE:	1395	CODE:
1323	if (nreqs)
1324	poll_wait ();	1396	poll_wait ();
1325		1397
1326	int	1398	int
1327	nreqs()	1399	nreqs ()
1328	PROTOTYPE:
1329	CODE:	1400	CODE:
1330	RETVAL = nreqs;	1401	RETVAL = eio_nreqs ();
1331	OUTPUT:	1402	OUTPUT:
1332	RETVAL	1403	RETVAL
1333		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
1334	PROTOTYPES: DISABLE	1553	PROTOTYPES: DISABLE
1335		1554
1336	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1555	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1337		1556
1338	void	1557	void
1339	cancel (aio_req_ornot req)	1558	cancel (aio_req_ornot req)
1340	PROTOTYPE:
1341	CODE:	1559	CODE:
1342	req_cancel (req);	1560	eio_cancel (req);
1343		1561
1344	void	1562	void
1345	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1563	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1346	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
1347	SvREFCNT_dec (req->callback);	1573	SvREFCNT_dec (req->callback);
1348	req->callback = newSVsv (callback);	1574	req->callback = SvREFCNT_inc (cb_cv);
		1575	}
		1576	}
1349		1577
1350	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1578	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1351		1579
1352	void	1580	void
1353	add (aio_req grp, ...)	1581	add (aio_req grp, ...)
1354	PPCODE:	1582	PPCODE:
1355	{	1583	{
1356	int i;	1584	int i;
1357	aio_req req;
1358		1585
1359	if (grp->fd == 2)	1586	if (grp->int1 == 2)
1360	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");
1361		1588
1362	for (i = 1; i < items; ++i )	1589	for (i = 1; i < items; ++i )
1363	{	1590	{
		1591	aio_req req;
		1592
1364	if (GIMME_V != G_VOID)	1593	if (GIMME_V != G_VOID)
1365	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1594	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1366		1595
1367	req = SvAIO_REQ (ST (i));	1596	req = SvAIO_REQ (ST (i));
1368		1597
1369	if (req)	1598	if (req)
1370	{	1599	eio_grp_add (grp, req);
1371	++grp->length;
1372	req->grp = grp;
1373
1374	req->grp_prev = 0;
1375	req->grp_next = grp->grp_first;
1376
1377	if (grp->grp_first)
1378	grp->grp_first->grp_prev = req;
1379
1380	grp->grp_first = req;
1381	}
1382	}	1600	}
1383	}	1601	}
		1602
		1603	void
		1604	cancel_subs (aio_req_ornot req)
		1605	CODE:
		1606	req_cancel_subs (req);
1384		1607
1385	void	1608	void
1386	result (aio_req grp, ...)	1609	result (aio_req grp, ...)
1387	CODE:	1610	CODE:
1388	{	1611	{
1389	int i;	1612	int i;
		1613	AV *av;
		1614
		1615	grp->errorno = errno;
		1616
1390	AV *av = newAV ();	1617	av = newAV ();
		1618	av_extend (av, items - 1);
1391		1619
1392	for (i = 1; i < items; ++i )	1620	for (i = 1; i < items; ++i )
1393	av_push (av, newSVsv (ST (i)));	1621	av_push (av, newSVsv (ST (i)));
1394		1622
1395	SvREFCNT_dec (grp->data);	1623	SvREFCNT_dec (grp->sv1);
1396	grp->data = (SV *)av;	1624	grp->sv1 = (SV *)av;
1397	}	1625	}
1398		1626
1399	void	1627	void
		1628	errno (aio_req grp, int errorno = errno)
		1629	CODE:
		1630	grp->errorno = errorno;
		1631
		1632	void
1400	feed_limit (aio_req grp, int limit)	1633	limit (aio_req grp, int limit)
1401	CODE:	1634	CODE:
1402	grp->fd2 = limit;	1635	eio_grp_limit (grp, limit);
1403	aio_grp_feed (grp);
1404		1636
1405	void	1637	void
1406	feed (aio_req grp, SV *callback=&PL_sv_undef)	1638	feed (aio_req grp, SV *callback=&PL_sv_undef)
1407	CODE:	1639	CODE:
1408	{	1640	{
1409	SvREFCNT_dec (grp->fh2);	1641	SvREFCNT_dec (grp->sv2);
1410	grp->fh2 = newSVsv (callback);	1642	grp->sv2 = newSVsv (callback);
		1643	grp->feed = aio_grp_feed;
1411		1644
1412	if (grp->fd2 <= 0)	1645	if (grp->int2 <= 0)
1413	grp->fd2 = 2;	1646	grp->int2 = 2;
1414		1647
1415	aio_grp_feed (grp);	1648	eio_grp_limit (grp, grp->int2);
1416	}	1649	}
1417		1650

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