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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 1.161 by root, Sun Jan 10 20:28:43 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
30	# if __linux
31	# include <sys/sendfile.h>
32	# elif __freebsd
33	# include <sys/socket.h>
34	# include <sys/uio.h>	22	# include <sys/mman.h>
35	# elif __hpux
36	# include <sys/socket.h>
37	# elif __solaris /* not yet */
38	# include <sys/sendfile.h>
39	# else
40	# error sendfile support requested but not available
41	# endif	23	#endif
42	#endif
43		24
44	/* used for struct dirent, AIX doesn't provide it */	25	/* perl namespace pollution */
45	#ifndef NAME_MAX	26	#undef VERSION
46	# define NAME_MAX 4096
47	#endif
48		27
49	#if __ia64	28	#ifdef _WIN32
50	# define STACKSIZE 65536	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
51	#else	66	#else
52	# define STACKSIZE 8192	67
		68	# include <sys/time.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
53	#endif	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	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	static int req_invoke (eio_req *req);
		184	#define EIO_FINISH(req) req_invoke (req)
		185	static void req_destroy (eio_req *grp);
		186	#define EIO_DESTROY(req) req_destroy (req)
54		187
55	enum {	188	enum {
56	REQ_QUIT,	189	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	};	190	};
68		191
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	192	#include "libeio/eio.c"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		193
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;	194	typedef eio_req *aio_req;
102	typedef aio_cb *aio_req_ornot;	195	typedef eio_req *aio_req_ornot;
103		196
104	enum {	197	static SV *on_next_submit;
105	PRI_MIN = -4,	198	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;	199	static int max_outstanding;
117	static int respipe [2];
118		200
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	201	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		202
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	203	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);	204	static void req_cancel (aio_req req);
133	static void req_free (aio_req req);	205
		206	static void want_poll (void)
		207	{
		208	/* write a dummy byte to the pipe so fh becomes ready */
		209	s_epipe_signal (&respipe);
		210	}
		211
		212	static void done_poll (void)
		213	{
		214	/* read any signals sent by the worker threads */
		215	s_epipe_drain (&respipe);
		216	}
134		217
135	/* must be called at most once */	218	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	219	static SV *req_sv (aio_req req, HV *stash)
137	{	220	{
138	if (!req->self)	221	if (!req->self)
139	{	222	{
140	req->self = (SV *)newHV ();	223	req->self = (SV *)newHV ();
141	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	224	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
142	}	225	}
143		226
144	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	227	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
145	}	228	}
146		229
147	static aio_req SvAIO_REQ (SV *sv)	230	static aio_req SvAIO_REQ (SV *sv)
148	{	231	{
149	MAGIC *mg;	232	MAGIC *mg;
150		233
151	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	234	if (!SvROK (sv)
		235	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		236	&& SvSTASH (SvRV (sv)) != aio_req_stash
		237	&& !sv_derived_from (sv, "IO::AIO::REQ")))
152	croak ("object of class " AIO_REQ_KLASS " expected");	238	croak ("object of class IO::AIO::REQ expected");
153		239
154	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	240	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
155		241
156	return mg ? (aio_req)mg->mg_ptr : 0;	242	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	243	}
158		244
159	static void aio_grp_feed (aio_req grp)	245	static void aio_grp_feed (aio_req grp)
160	{	246	{
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	247	if (grp->sv2 && SvOK (grp->sv2))
162	{	248	{
163	int old_len = grp->length;	249	dSP;
164		250
165	if (grp->fh2 && SvOK (grp->fh2))	251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	XPUSHs (req_sv (grp, aio_grp_stash));
		255	PUTBACK;
		256	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		257	SPAGAIN;
		258	FREETMPS;
		259	LEAVE;
		260	}
		261	}
		262
		263	static void req_submit (eio_req *req)
		264	{
		265	eio_submit (req);
		266
		267	if (expect_false (on_next_submit))
		268	{
		269	dSP;
		270	SV *cb = sv_2mortal (on_next_submit);
		271
		272	on_next_submit = 0;
		273
		274	PUSHMARK (SP);
		275	PUTBACK;
		276	call_sv (cb, G_DISCARD | G_EVAL);
		277	}
		278	}
		279
		280	static int req_invoke (eio_req *req)
		281	{
		282	dSP;
		283
		284	if (req->flags & FLAG_SV2_RO_OFF)
		285	SvREADONLY_off (req->sv2);
		286
		287	if (!EIO_CANCELLED (req) && req->callback)
		288	{
		289	ENTER;
		290	SAVETMPS;
		291	PUSHMARK (SP);
		292	EXTEND (SP, 1);
		293
		294	switch (req->type)
166	{	295	{
167	dSP;	296	case EIO_READDIR:
		297	{
		298	SV *rv = &PL_sv_undef;
168		299
169	ENTER;	300	if (req->result >= 0)
170	SAVETMPS;	301	{
171	PUSHMARK (SP);	302	int i;
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	303	char *names = (char *)req->ptr2;
173	PUTBACK;	304	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
174	call_sv (grp->fh2, G_VOID | G_EVAL);	305	AV *av = newAV ();
175	SPAGAIN;	306
176	FREETMPS;	307	av_extend (av, req->result - 1);
177	LEAVE;	308
		309	for (i = 0; i < req->result; ++i)
		310	{
		311	if (req->int1 & EIO_READDIR_DENTS)
		312	{
		313	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		314
		315	if (req->int1 & EIO_READDIR_CUSTOM2)
		316	{
		317	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		318	AV *avent = newAV ();
		319
		320	av_extend (avent, 2);
		321
		322	if (!sv_type [ent->type])
		323	{
		324	sv_type [ent->type] = newSViv (ent->type);
		325	SvREADONLY_on (sv_type [ent->type]);
		326	}
		327
		328	av_store (avent, 0, namesv);
		329	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		330	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		331
		332	av_store (av, i, newRV_noinc ((SV *)avent));
		333	}
		334	else
		335	av_store (av, i, namesv);
		336
		337	++ent;
		338	}
		339	else
		340	{
		341	SV *name = newSVpv (names, 0);
		342	av_store (av, i, name);
		343	names += SvCUR (name) + 1;
		344	}
		345	}
		346
		347	rv = sv_2mortal (newRV_noinc ((SV *)av));
		348	}
		349
		350	PUSHs (rv);
		351
		352	if (req->int1 & EIO_READDIR_CUSTOM1)
		353	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		354	}
		355	break;
		356
		357	case EIO_OPEN:
		358	{
		359	/* convert fd to fh */
		360	SV *fh = &PL_sv_undef;
		361
		362	if (req->result >= 0)
		363	{
		364	GV *gv = (GV *)sv_newmortal ();
		365	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		366	char sym [64];
		367	int symlen;
		368
		369	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		370	gv_init (gv, aio_stash, sym, symlen, 0);
		371
		372	symlen = snprintf (
		373	sym,
		374	sizeof (sym),
		375	"%s&=%d",
		376	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		377	(int)req->result
		378	);
		379
		380	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		381	fh = (SV *)gv;
		382	}
		383
		384	PUSHs (fh);
		385	}
		386	break;
		387
		388	case EIO_STATVFS:
		389	case EIO_FSTATVFS:
		390	{
		391	SV *rv = &PL_sv_undef;
		392
		393	if (req->result >= 0)
		394	{
		395	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		396	HV *hv = newHV ();
		397
		398	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		399
		400	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		401	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		402	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		403	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		404	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		405	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		406	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		407	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		408	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		409	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		410	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		411	}
		412
		413	PUSHs (rv);
		414	}
		415
		416	break;
		417
		418	case EIO_GROUP:
		419	req->int1 = 2; /* mark group as finished */
		420
		421	if (req->sv1)
		422	{
		423	int i;
		424	AV *av = (AV *)req->sv1;
		425
		426	EXTEND (SP, AvFILL (av) + 1);
		427	for (i = 0; i <= AvFILL (av); ++i)
		428	PUSHs (*av_fetch (av, i, 0));
		429	}
		430	break;
		431
		432	case EIO_NOP:
		433	case EIO_BUSY:
		434	break;
		435
		436	case EIO_READLINK:
		437	if (req->result > 0)
		438	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		439	break;
		440
		441	case EIO_STAT:
		442	case EIO_LSTAT:
		443	case EIO_FSTAT:
		444	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		445	PL_laststatval = req->result;
		446	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		447	PUSHs (sv_2mortal (newSViv (req->result)));
		448	break;
		449
		450	case EIO_READ:
		451	{
		452	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		453	*SvEND (req->sv2) = 0;
		454	SvPOK_only (req->sv2);
		455	SvSETMAGIC (req->sv2);
		456	PUSHs (sv_2mortal (newSViv (req->result)));
		457	}
		458	break;
		459
		460	case EIO_DUP2:
		461	if (req->result > 0)
		462	req->result = 0;
		463	/* FALLTHROUGH */
		464
		465	default:
		466	PUSHs (sv_2mortal (newSViv (req->result)));
		467	break;
178	}	468	}
179		469
180	/* stop if no progress has been made */	470	errno = req->errorno;
181	if (old_len == grp->length)	471
182	{	472	PUTBACK;
183	SvREFCNT_dec (grp->fh2);	473	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
184	grp->fh2 = 0;	474	SPAGAIN;
185	break;	475
186	}	476	FREETMPS;
		477	LEAVE;
		478
		479	PUTBACK;
187	}	480	}
188	}
189		481
190	static void aio_grp_dec (aio_req grp)	482	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	}	483	}
204		484
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)	485	static void req_destroy (aio_req req)
326	{	486	{
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)	487	if (req->self)
342	{	488	{
343	sv_unmagic (req->self, PERL_MAGIC_ext);	489	sv_unmagic (req->self, PERL_MAGIC_ext);
344	SvREFCNT_dec (req->self);	490	SvREFCNT_dec (req->self);
345	}	491	}
346		492
347	SvREFCNT_dec (req->data);
348	SvREFCNT_dec (req->fh);	493	SvREFCNT_dec (req->sv1);
349	SvREFCNT_dec (req->fh2);	494	SvREFCNT_dec (req->sv2);
350	SvREFCNT_dec (req->callback);	495	SvREFCNT_dec (req->callback);
351	Safefree (req->statdata);
352
353	if (req->type == REQ_READDIR && req->result >= 0)
354	free (req->data2ptr);
355		496
356	Safefree (req);	497	Safefree (req);
357	}	498	}
358		499
359	static void req_cancel (aio_req req)	500	static void req_cancel_subs (aio_req grp)
360	{	501	{
361	req->flags |= FLAG_CANCELLED;	502	aio_req sub;
362		503
363	if (req->type == REQ_GROUP)	504	if (grp->type != EIO_GROUP)
		505	return;
		506
		507	SvREFCNT_dec (grp->sv2);
		508	grp->sv2 = 0;
		509
		510	eio_grp_cancel (grp);
		511	}
		512
		513	static void
		514	create_respipe (void)
		515	{
		516	if (s_epipe_renew (&respipe))
		517	croak ("IO::AIO: unable to initialize result pipe");
		518	}
		519
		520	static void poll_wait (void)
		521	{
		522	while (eio_nreqs ())
364	{	523	{
365	aio_req sub;	524	int size;
366		525
367	for (sub = req->grp_first; sub; sub = sub->grp_next)	526	X_LOCK (reslock);
368	req_cancel (sub);	527	size = res_queue.size;
		528	X_UNLOCK (reslock);
		529
		530	if (size)
		531	return;
		532
		533	etp_maybe_start_thread ();
		534
		535	s_epipe_wait (&respipe);
369	}	536	}
370	}	537	}
371		538
372	static int poll_cb ()	539	static int poll_cb (void)
373	{	540	{
374	dSP;
375	int count = 0;
376	int do_croak = 0;
377	aio_req req;
378
379	for (;;)	541	for (;;)
380	{	542	{
381	pthread_mutex_lock (&reslock);	543	int res = eio_poll ();
382	req = ress;
383		544
384	if (req)	545	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;	546	croak (0);
403		547
404	--nreqs;	548	if (!max_outstanding || max_outstanding > eio_nreqs ())
		549	return res;
405		550
406	if (req->type == REQ_QUIT)	551	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	}	552	}
435
436	return count;
437	}
438
439	static void *aio_proc(void *arg);
440
441	static void start_thread (void)
442	{
443	sigset_t fullsigset, oldsigset;
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	}
540
541	/*****************************************************************************/
542	/* work around various missing functions */
543
544	#if !HAVE_PREADWRITE
545	# define pread aio_pread
546	# define pwrite aio_pwrite
547
548	/*
549	* make our pread/pwrite safe against themselves, but not against
550	* normal read/write by using a mutex. slows down execution a lot,
551	* but that's your problem, not mine.
552	*/
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
686	#else
687	res = -1;
688	errno = ENOSYS;
689	#endif
690
691	if (res < 0
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
703	while (count)
704	{
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	{
735	DIR *dirp = opendir (path);
736	union
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;
782	closedir (dirp);
783
784	if (errorno)
785	{
786	free (names);
787	errno = errorno;
788	res = -1;
789	}
790
791	*namesp = (void *)names;
792	return res;
793	}
794
795	/*****************************************************************************/
796
797	static void *aio_proc (void *thr_arg)
798	{
799	aio_req req;
800	int type;
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	}	553	}
923		554
924	static void atfork_child (void)	555	static void atfork_child (void)
925	{	556	{
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 ();	557	create_respipe ();
		558	}
951		559
952	atfork_parent ();	560	static SV *
		561	get_cb (SV *cb_sv)
		562	{
		563	SvGETMAGIC (cb_sv);
		564	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
953	}	565	}
954		566
955	#define dREQ \	567	#define dREQ \
		568	SV *cb_cv; \
956	aio_req req; \	569	aio_req req; \
957	int req_pri = next_pri; \	570	int req_pri = next_pri; \
958	next_pri = DEFAULT_PRI + PRI_BIAS; \	571	next_pri = EIO_PRI_DEFAULT; \
959	\	572	\
960	if (SvOK (callback) && !SvROK (callback)) \	573	cb_cv = get_cb (callback); \
961	croak ("callback must be undef or of reference type"); \
962	\	574	\
963	Newz (0, req, 1, aio_cb); \	575	Newz (0, req, 1, eio_req); \
964	if (!req) \	576	if (!req) \
965	croak ("out of memory during aio_req allocation"); \	577	croak ("out of memory during eio_req allocation"); \
966	\	578	\
967	req->callback = newSVsv (callback); \	579	req->callback = SvREFCNT_inc (cb_cv); \
968	req->pri = req_pri	580	req->pri = req_pri
969		581
970	#define REQ_SEND \	582	#define REQ_SEND \
		583	PUTBACK; \
971	req_send (req); \	584	req_submit (req); \
		585	SPAGAIN; \
972	\	586	\
973	if (GIMME_V != G_VOID) \	587	if (GIMME_V != G_VOID) \
974	XPUSHs (req_sv (req, AIO_REQ_KLASS));	588	XPUSHs (req_sv (req, aio_req_stash));
975		589
976	MODULE = IO::AIO PACKAGE = IO::AIO	590	MODULE = IO::AIO PACKAGE = IO::AIO
977		591
978	PROTOTYPES: ENABLE	592	PROTOTYPES: ENABLE
979		593
980	BOOT:	594	BOOT:
981	{	595	{
		596	static const struct {
		597	const char *name;
		598	IV iv;
		599	} *civ, const_iv[] = {
		600	# define const_iv(name, value) { # name, (IV) value },
		601	# define const_eio(name) { # name, (IV) EIO_ ## name },
		602	const_iv (EXDEV , EXDEV)
		603	const_iv (ENOSYS , ENOSYS)
		604	const_iv (O_RDONLY, O_RDONLY)
		605	const_iv (O_WRONLY, O_WRONLY)
		606	const_iv (O_CREAT , O_CREAT)
		607	const_iv (O_TRUNC , O_TRUNC)
		608	#ifndef _WIN32
		609	const_iv (S_IFIFO , S_IFIFO)
		610	#endif
		611	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		612	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		613	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		614	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		615	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		616	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		617
		618	const_iv (ST_RDONLY , ST_RDONLY)
		619	const_iv (ST_NOSUID , ST_NOSUID)
		620	const_iv (ST_NODEV , ST_NODEV)
		621	const_iv (ST_NOEXEC , ST_NOEXEC)
		622	const_iv (ST_SYNCHRONOUS , ST_SYNCHRONOUS)
		623	const_iv (ST_MANDLOCK , ST_MANDLOCK)
		624	const_iv (ST_WRITE , ST_WRITE)
		625	const_iv (ST_APPEND , ST_APPEND)
		626	const_iv (ST_IMMUTABLE , ST_IMMUTABLE)
		627	const_iv (ST_NOATIME , ST_NOATIME)
		628	const_iv (ST_NODIRATIME , ST_NODIRATIME)
		629	const_iv (ST_RELATIME , ST_RELATIME)
		630
		631	const_iv (MCL_FUTURE , MCL_FUTURE)
		632	const_iv (MCL_CURRENT , MCL_CURRENT)
		633
		634	const_eio (MS_ASYNC)
		635	const_eio (MS_INVALIDATE)
		636	const_eio (MS_SYNC)
		637
		638	const_eio (MT_MODIFY)
		639
		640	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		641	const_eio (SYNC_FILE_RANGE_WRITE)
		642	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		643
		644	const_eio (READDIR_DENTS)
		645	const_eio (READDIR_DIRS_FIRST)
		646	const_eio (READDIR_STAT_ORDER)
		647	const_eio (READDIR_FOUND_UNKNOWN)
		648
		649	const_eio (DT_UNKNOWN)
		650	const_eio (DT_FIFO)
		651	const_eio (DT_CHR)
		652	const_eio (DT_DIR)
		653	const_eio (DT_BLK)
		654	const_eio (DT_REG)
		655	const_eio (DT_LNK)
		656	const_eio (DT_SOCK)
		657	const_eio (DT_WHT)
		658	};
		659
982	HV *stash = gv_stashpv ("IO::AIO", 1);	660	aio_stash = gv_stashpv ("IO::AIO" , 1);
983	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	661	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
984	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	662	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
985	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
986		663
		664	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		665	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		666
987	create_pipe ();	667	create_respipe ();
988	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
989	}
990		668
		669	if (eio_init (want_poll, done_poll) < 0)
		670	croak ("IO::AIO: unable to initialise eio library");
		671
		672	/* atfork child called in fifo order, so before eio's handler */
		673	X_THREAD_ATFORK (0, 0, atfork_child);
		674	}
		675
991	void	676	void
992	min_parallel (nthreads)	677	max_poll_reqs (int nreqs)
993	int nthreads
994	PROTOTYPE: $	678	PROTOTYPE: $
		679	CODE:
		680	eio_set_max_poll_reqs (nreqs);
995		681
996	void	682	void
997	max_parallel (nthreads)	683	max_poll_time (double nseconds)
998	int nthreads
999	PROTOTYPE: $	684	PROTOTYPE: $
1000
1001	int
1002	max_outstanding (nreqs)
1003	int nreqs
1004	PROTOTYPE: $
1005	CODE:	685	CODE:
1006	RETVAL = max_outstanding;	686	eio_set_max_poll_time (nseconds);
		687
		688	void
		689	min_parallel (int nthreads)
		690	PROTOTYPE: $
		691	CODE:
		692	eio_set_min_parallel (nthreads);
		693
		694	void
		695	max_parallel (int nthreads)
		696	PROTOTYPE: $
		697	CODE:
		698	eio_set_max_parallel (nthreads);
		699
		700	void
		701	max_idle (int nthreads)
		702	PROTOTYPE: $
		703	CODE:
		704	eio_set_max_idle (nthreads);
		705
		706	void
		707	max_outstanding (int maxreqs)
		708	PROTOTYPE: $
		709	CODE:
1007	max_outstanding = nreqs;	710	max_outstanding = maxreqs;
1008		711
1009	void	712	void
1010	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	713	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: $$$;$	714	PROTOTYPE: $$$;$
1016	PPCODE:	715	PPCODE:
1017	{	716	{
1018	dREQ;	717	dREQ;
1019		718
1020	req->type = REQ_OPEN;	719	req->type = EIO_OPEN;
1021	req->data = newSVsv (pathname);	720	req->sv1 = newSVsv (pathname);
1022	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
1023	req->fd = flags;	722	req->int1 = flags;
1024	req->mode = mode;	723	req->int2 = mode;
1025		724
1026	REQ_SEND;	725	REQ_SEND;
1027	}	726	}
1028		727
1029	void	728	void
1030	aio_close (fh,callback=&PL_sv_undef)	729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1031	SV * fh
1032	SV * callback
1033	PROTOTYPE: $;$	730	PROTOTYPE: $;$
1034	ALIAS:	731	ALIAS:
1035	aio_close = REQ_CLOSE
1036	aio_fsync = REQ_FSYNC	732	aio_fsync = EIO_FSYNC
1037	aio_fdatasync = REQ_FDATASYNC	733	aio_fdatasync = EIO_FDATASYNC
1038	PPCODE:	734	PPCODE:
1039	{	735	{
		736	int fd = s_fileno_croak (fh, 0);
1040	dREQ;	737	dREQ;
1041		738
1042	req->type = ix;	739	req->type = ix;
1043	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
1044	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	741	req->int1 = fd;
1045		742
1046	REQ_SEND (req);	743	REQ_SEND (req);
1047	}	744	}
1048		745
1049	void	746	void
		747	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		748	PROTOTYPE: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
1050	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1051	SV * fh
1052	UV offset
1053	UV length
1054	SV * data
1055	UV dataoffset
1056	SV * callback
1057	ALIAS:	795	ALIAS:
1058	aio_read = REQ_READ	796	aio_read = EIO_READ
1059	aio_write = REQ_WRITE	797	aio_write = EIO_WRITE
1060	PROTOTYPE: $$$$$;$	798	PROTOTYPE: $$$$$;$
1061	PPCODE:	799	PPCODE:
1062	{	800	{
1063	aio_req req;
1064	STRLEN svlen;	801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1065	char *svptr = SvPVbyte (data, svlen);	803	char *svptr = SvPVbyte (data, svlen);
1066		804	UV len = SvUV (length);
1067	SvUPGRADE (data, SVt_PV);
1068	SvPOK_on (data);
1069		805
1070	if (dataoffset < 0)	806	if (dataoffset < 0)
1071	dataoffset += svlen;	807	dataoffset += svlen;
1072		808
1073	if (dataoffset < 0 || dataoffset > svlen)	809	if (dataoffset < 0 || dataoffset > svlen)
1074	croak ("data offset outside of string");	810	croak ("dataoffset outside of data scalar");
1075		811
1076	if (ix == REQ_WRITE)	812	if (ix == EIO_WRITE)
1077	{	813	{
1078	/* write: check length and adjust. */	814	/* write: check length and adjust. */
1079	if (length < 0 || length + dataoffset > svlen)	815	if (!SvOK (length) || len + dataoffset > svlen)
1080	length = svlen - dataoffset;	816	len = svlen - dataoffset;
1081	}	817	}
1082	else	818	else
1083	{	819	{
1084	/* read: grow scalar as necessary */	820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
1085	svptr = SvGROW (data, length + dataoffset);	822	svptr = SvGROW (data, len + dataoffset + 1);
1086	}	823	}
1087
1088	if (length < 0)
1089	croak ("length must not be negative");
1090		824
1091	{	825	{
1092	dREQ;	826	dREQ;
1093		827
1094	req->type = ix;	828	req->type = ix;
1095	req->fh = newSVsv (fh);	829	req->sv1 = newSVsv (fh);
1096	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	830	req->int1 = fd;
1097	: IoOFP (sv_2io (fh)));	831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1098	req->offset = offset;	832	req->size = len;
1099	req->length = length;
1100	req->data = SvREFCNT_inc (data);	833	req->sv2 = SvREFCNT_inc (data);
1101	req->dataptr = (char *)svptr + dataoffset;	834	req->ptr2 = (char *)svptr + dataoffset;
		835	req->stroffset = dataoffset;
1102		836
1103	if (!SvREADONLY (data))	837	if (!SvREADONLY (data))
1104	{	838	{
1105	SvREADONLY_on (data);	839	SvREADONLY_on (data);
1106	req->data2ptr = (void *)data;	840	req->flags |= FLAG_SV2_RO_OFF;
1107	}	841	}
1108		842
1109	REQ_SEND;	843	REQ_SEND;
1110	}	844	}
1111	}	845	}
1112		846
1113	void	847	void
		848	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $$;$
		850	PPCODE:
		851	{
		852	SV *data;
		853	dREQ;
		854
		855	req->type = EIO_READLINK;
		856	req->sv1 = newSVsv (path);
		857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858
		859	REQ_SEND;
		860	}
		861
		862	void
1114	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	863	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, 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: $$$$;$	864	PROTOTYPE: $$$$;$
1121	PPCODE:	865	PPCODE:
1122	{	866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
1123	dREQ;	869	dREQ;
1124		870
1125	req->type = REQ_SENDFILE;	871	req->type = EIO_SENDFILE;
1126	req->fh = newSVsv (out_fh);	872	req->sv1 = newSVsv (out_fh);
1127	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	873	req->int1 = ofd;
1128	req->fh2 = newSVsv (in_fh);	874	req->sv2 = newSVsv (in_fh);
1129	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	875	req->int2 = ifd;
1130	req->offset = in_offset;	876	req->offs = in_offset;
1131	req->length = length;	877	req->size = length;
1132		878
1133	REQ_SEND;	879	REQ_SEND;
1134	}	880	}
1135		881
1136	void	882	void
1137	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	UV offset
1140	IV length
1141	SV * callback
1142	PROTOTYPE: $$$;$	884	PROTOTYPE: $$$;$
1143	PPCODE:	885	PPCODE:
1144	{	886	{
		887	int fd = s_fileno_croak (fh, 0);
1145	dREQ;	888	dREQ;
1146		889
1147	req->type = REQ_READAHEAD;	890	req->type = EIO_READAHEAD;
1148	req->fh = newSVsv (fh);	891	req->sv1 = newSVsv (fh);
1149	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	892	req->int1 = fd;
1150	req->offset = offset;	893	req->offs = offset;
1151	req->length = length;	894	req->size = length;
1152		895
1153	REQ_SEND;	896	REQ_SEND;
1154	}	897	}
1155		898
1156	void	899	void
1157	aio_stat (fh_or_path,callback=&PL_sv_undef)	900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1158	SV * fh_or_path
1159	SV * callback
1160	ALIAS:	901	ALIAS:
1161	aio_stat = REQ_STAT	902	aio_stat = EIO_STAT
1162	aio_lstat = REQ_LSTAT	903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
1163	PPCODE:	905	PPCODE:
1164	{	906	{
1165	dREQ;	907	dREQ;
1166		908
1167	New (0, req->statdata, 1, Stat_t);	909	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		910
1174	if (SvPOK (fh_or_path))	911	if (SvPOK (req->sv1))
1175	{	912	{
1176	req->type = ix;	913	req->type = ix;
1177	req->data = newSVsv (fh_or_path);
1178	req->dataptr = SvPVbyte_nolen (req->data);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
1179	}	915	}
1180	else	916	else
1181	{	917	{
1182	req->type = REQ_FSTAT;	918	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)));	919	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1185	}	920	}
1186		921
1187	REQ_SEND;	922	REQ_SEND;
1188	}	923	}
1189		924
1190	void	925	void
		926	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		927	PPCODE:
		928	{
		929	dREQ;
		930
		931	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		932	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		933	req->sv1 = newSVsv (fh_or_path);
		934
		935	if (SvPOK (req->sv1))
		936	{
		937	req->type = EIO_UTIME;
		938	req->ptr1 = SvPVbyte_nolen (req->sv1);
		939	}
		940	else
		941	{
		942	req->type = EIO_FUTIME;
		943	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		944	}
		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->sv1 = newSVsv (fh_or_path);
		956	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		957
		958	if (SvPOK (req->sv1))
		959	{
		960	req->type = EIO_TRUNCATE;
		961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962	}
		963	else
		964	{
		965	req->type = EIO_FTRUNCATE;
		966	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		967	}
		968
		969	REQ_SEND;
		970	}
		971
		972	void
		973	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_chmod = EIO_CHMOD
		976	aio_mkdir = EIO_MKDIR
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->int2 = mode;
		982	req->sv1 = newSVsv (fh_or_path);
		983
		984	if (SvPOK (req->sv1))
		985	{
		986	req->type = ix;
		987	req->ptr1 = SvPVbyte_nolen (req->sv1);
		988	}
		989	else
		990	{
		991	req->type = EIO_FCHMOD;
		992	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		993	}
		994
		995	REQ_SEND;
		996	}
		997
		998	void
		999	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1000	PPCODE:
		1001	{
		1002	dREQ;
		1003
		1004	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1005	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1006	req->sv1 = newSVsv (fh_or_path);
		1007
		1008	if (SvPOK (req->sv1))
		1009	{
		1010	req->type = EIO_CHOWN;
		1011	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1012	}
		1013	else
		1014	{
		1015	req->type = EIO_FCHOWN;
		1016	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1017	}
		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_READDIR;
		1029	req->sv1 = newSVsv (pathname);
		1030	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1031	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1032
		1033	if (flags & EIO_READDIR_DENTS)
		1034	req->int1 |= EIO_READDIR_CUSTOM2;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	void
1191	aio_unlink (pathname,callback=&PL_sv_undef)	1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1192	SV * pathname
1193	SV * callback
1194	ALIAS:	1041	ALIAS:
1195	aio_unlink = REQ_UNLINK	1042	aio_unlink = EIO_UNLINK
1196	aio_rmdir = REQ_RMDIR	1043	aio_rmdir = EIO_RMDIR
1197	aio_readdir = REQ_READDIR	1044	aio_readdir = EIO_READDIR
1198	PPCODE:	1045	PPCODE:
1199	{	1046	{
1200	dREQ;	1047	dREQ;
1201		1048
1202	req->type = ix;	1049	req->type = ix;
1203	req->data = newSVsv (pathname);	1050	req->sv1 = newSVsv (pathname);
1204	req->dataptr = SvPVbyte_nolen (req->data);	1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
1205		1052
1206	REQ_SEND;	1053	REQ_SEND;
1207	}	1054	}
1208		1055
1209	void	1056	void
1210	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1211	SV * oldpath
1212	SV * newpath
1213	SV * callback
1214	ALIAS:	1058	ALIAS:
1215	aio_link = REQ_LINK	1059	aio_link = EIO_LINK
1216	aio_symlink = REQ_SYMLINK	1060	aio_symlink = EIO_SYMLINK
1217	aio_rename = REQ_RENAME	1061	aio_rename = EIO_RENAME
1218	PPCODE:	1062	PPCODE:
1219	{	1063	{
1220	dREQ;	1064	dREQ;
1221		1065
1222	req->type = ix;	1066	req->type = ix;
1223	req->fh = newSVsv (oldpath);	1067	req->sv1 = newSVsv (oldpath);
1224	req->data2ptr = SvPVbyte_nolen (req->fh);	1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
1225	req->data = newSVsv (newpath);	1069	req->sv2 = newSVsv (newpath);
1226	req->dataptr = SvPVbyte_nolen (req->data);	1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
1227		1071
1228	REQ_SEND;	1072	REQ_SEND;
1229	}	1073	}
1230		1074
1231	void	1075	void
1232	aio_sleep (delay,callback=&PL_sv_undef)	1076	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1233	double delay
1234	SV * callback
1235	PPCODE:	1077	PPCODE:
1236	{	1078	{
1237	dREQ;	1079	dREQ;
1238		1080
1239	req->type = REQ_SLEEP;	1081	req->type = EIO_MKNOD;
1240	req->fd = delay < 0. ? 0 : delay;	1082	req->sv1 = newSVsv (pathname);
1241	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1083	req->ptr1 = SvPVbyte_nolen (req->sv1);
1242		1084	req->int2 = (mode_t)mode;
		1085	req->offs = dev;
		1086
1243	REQ_SEND;	1087	REQ_SEND;
1244	}	1088	}
1245		1089
1246	void	1090	void
		1091	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1092	ALIAS:
		1093	aio_mtouch = EIO_MTOUCH
		1094	aio_msync = EIO_MSYNC
		1095	PROTOTYPE: $$$$;$
		1096	PPCODE:
		1097	{
		1098	STRLEN svlen;
		1099	UV len = SvUV (length);
		1100	char *svptr = SvPVbyte (data, svlen);
		1101
		1102	if (offset < 0)
		1103	offset += svlen;
		1104
		1105	if (offset < 0 || offset > svlen)
		1106	croak ("offset outside of scalar");
		1107
		1108	if (!SvOK (length) || len + offset > svlen)
		1109	len = svlen - offset;
		1110
		1111	{
		1112	dREQ;
		1113
		1114	req->type = ix;
		1115	req->size = len;
		1116	req->sv2 = SvREFCNT_inc (data);
		1117	req->ptr2 = (char *)svptr + offset;
		1118	req->int1 = flags;
		1119
		1120	REQ_SEND;
		1121	}
		1122	}
		1123
		1124	void
		1125	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_BUSY;
		1131	req->nv1 = delay < 0. ? 0. : delay;
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
1247	aio_group (callback=&PL_sv_undef)	1137	aio_group (SV *callback=&PL_sv_undef)
1248	SV * callback
1249	PROTOTYPE: ;$	1138	PROTOTYPE: ;$
1250	PPCODE:	1139	PPCODE:
1251	{	1140	{
1252	dREQ;	1141	dREQ;
1253		1142
1254	req->type = REQ_GROUP;	1143	req->type = EIO_GROUP;
		1144
1255	req_send (req);	1145	req_submit (req);
1256
1257	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1146	XPUSHs (req_sv (req, aio_grp_stash));
1258	}	1147	}
1259		1148
1260	void	1149	void
1261	aio_nop (callback=&PL_sv_undef)	1150	aio_nop (SV *callback=&PL_sv_undef)
1262	SV * callback	1151	ALIAS:
		1152	aio_nop = EIO_NOP
		1153	aio_sync = EIO_SYNC
1263	PPCODE:	1154	PPCODE:
1264	{	1155	{
1265	dREQ;	1156	dREQ;
1266		1157
1267	req->type = REQ_NOP;	1158	req->type = ix;
1268		1159
1269	REQ_SEND;	1160	REQ_SEND;
1270	}	1161	}
1271		1162
1272	#if 0	1163	int
1273		1164	aioreq_pri (int pri = 0)
1274	void	1165	PROTOTYPE: ;$
1275	aio_pri (int pri = DEFAULT_PRI)
1276	CODE:	1166	CODE:
		1167	RETVAL = next_pri;
		1168	if (items > 0)
		1169	{
1277	if (pri < PRI_MIN) pri = PRI_MIN;	1170	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1278	if (pri > PRI_MAX) pri = PRI_MAX;	1171	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1279	next_pri = pri + PRI_BIAS;	1172	next_pri = pri;
		1173	}
		1174	OUTPUT:
		1175	RETVAL
1280		1176
1281	#endif	1177	void
		1178	aioreq_nice (int nice = 0)
		1179	CODE:
		1180	nice = next_pri - nice;
		1181	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1182	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1183	next_pri = nice;
1282		1184
1283	void	1185	void
1284	flush ()	1186	flush ()
1285	PROTOTYPE:	1187	PROTOTYPE:
1286	CODE:	1188	CODE:
1287	while (nreqs)	1189	while (eio_nreqs ())
1288	{	1190	{
1289	poll_wait ();	1191	poll_wait ();
1290	poll_cb ();	1192	poll_cb ();
1291	}	1193	}
1292		1194
1293	void	1195	int
1294	poll()	1196	poll()
1295	PROTOTYPE:	1197	PROTOTYPE:
1296	CODE:	1198	CODE:
1297	if (nreqs)
1298	{
1299	poll_wait ();	1199	poll_wait ();
1300	poll_cb ();	1200	RETVAL = poll_cb ();
1301	}	1201	OUTPUT:
		1202	RETVAL
1302		1203
1303	int	1204	int
1304	poll_fileno()	1205	poll_fileno()
1305	PROTOTYPE:	1206	PROTOTYPE:
1306	CODE:	1207	CODE:
1307	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
1308	OUTPUT:	1209	OUTPUT:
1309	RETVAL	1210	RETVAL
1310		1211
1311	int	1212	int
1312	poll_cb(...)	1213	poll_cb(...)
…		…
1318		1219
1319	void	1220	void
1320	poll_wait()	1221	poll_wait()
1321	PROTOTYPE:	1222	PROTOTYPE:
1322	CODE:	1223	CODE:
1323	if (nreqs)
1324	poll_wait ();	1224	poll_wait ();
1325		1225
1326	int	1226	int
1327	nreqs()	1227	nreqs()
1328	PROTOTYPE:	1228	PROTOTYPE:
1329	CODE:	1229	CODE:
1330	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
1331	OUTPUT:	1231	OUTPUT:
1332	RETVAL	1232	RETVAL
1333		1233
		1234	int
		1235	nready()
		1236	PROTOTYPE:
		1237	CODE:
		1238	RETVAL = eio_nready ();
		1239	OUTPUT:
		1240	RETVAL
		1241
		1242	int
		1243	npending()
		1244	PROTOTYPE:
		1245	CODE:
		1246	RETVAL = eio_npending ();
		1247	OUTPUT:
		1248	RETVAL
		1249
		1250	int
		1251	nthreads()
		1252	PROTOTYPE:
		1253	CODE:
		1254	RETVAL = eio_nthreads ();
		1255	OUTPUT:
		1256	RETVAL
		1257
		1258	int
		1259	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1260	PROTOTYPE: $$$$
		1261	CODE:
		1262	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1263	RETVAL = posix_fadvise (fh, offset, length, advice);
		1264	#else
		1265	RETVAL = errno = ENOSYS;
		1266	#endif
		1267	OUTPUT:
		1268	RETVAL
		1269
		1270	ssize_t
		1271	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1272	PROTOTYPE: $$$$
		1273	CODE:
		1274	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	mlockall (int flags)
		1280	PROTOTYPE: $
		1281	CODE:
		1282	#if _POSIX_MEMLOCK
		1283	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1284	extern int mallopt (int, int);
		1285	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1286	#endif
		1287	mlockall (flags);
		1288	#else
		1289	RETVAL ＝-1;
		1290	errno = ENOSYS;
		1291	#endif
		1292	OUTPUT:
		1293	RETVAL
		1294
		1295	int
		1296	munlockall ()
		1297	PROTOTYPE:
		1298	CODE:
		1299	#if _POSIX_MEMLOCK
		1300	munlockall ();
		1301	#else
		1302	RETVAL ＝-1;
		1303	errno = ENOSYS;
		1304	#endif
		1305	OUTPUT:
		1306	RETVAL
		1307
		1308	void _on_next_submit (SV *cb)
		1309	CODE:
		1310	SvREFCNT_dec (on_next_submit);
		1311	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1312
1334	PROTOTYPES: DISABLE	1313	PROTOTYPES: DISABLE
1335		1314
1336	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1315	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1337		1316
1338	void	1317	void
1339	cancel (aio_req_ornot req)	1318	cancel (aio_req_ornot req)
1340	PROTOTYPE:
1341	CODE:	1319	CODE:
1342	req_cancel (req);	1320	eio_cancel (req);
1343		1321
1344	void	1322	void
1345	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1323	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1346	CODE:	1324	PPCODE:
		1325	{
		1326	if (GIMME_V != G_VOID)
		1327	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1328
		1329	if (items > 1)
		1330	{
		1331	SV *cb_cv =get_cb (callback);
		1332
1347	SvREFCNT_dec (req->callback);	1333	SvREFCNT_dec (req->callback);
1348	req->callback = newSVsv (callback);	1334	req->callback = SvREFCNT_inc (cb_cv);
		1335	}
		1336	}
1349		1337
1350	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1351		1339
1352	void	1340	void
1353	add (aio_req grp, ...)	1341	add (aio_req grp, ...)
1354	PPCODE:	1342	PPCODE:
1355	{	1343	{
1356	int i;	1344	int i;
1357	aio_req req;
1358		1345
1359	if (grp->fd == 2)	1346	if (grp->int1 == 2)
1360	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1347	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1361		1348
1362	for (i = 1; i < items; ++i )	1349	for (i = 1; i < items; ++i )
1363	{	1350	{
		1351	aio_req req;
		1352
1364	if (GIMME_V != G_VOID)	1353	if (GIMME_V != G_VOID)
1365	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1354	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1366		1355
1367	req = SvAIO_REQ (ST (i));	1356	req = SvAIO_REQ (ST (i));
1368		1357
1369	if (req)	1358	if (req)
1370	{	1359	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	}	1360	}
1382	}
1383	}	1361	}
		1362
		1363	void
		1364	cancel_subs (aio_req_ornot req)
		1365	CODE:
		1366	req_cancel_subs (req);
1384		1367
1385	void	1368	void
1386	result (aio_req grp, ...)	1369	result (aio_req grp, ...)
1387	CODE:	1370	CODE:
1388	{	1371	{
1389	int i;	1372	int i;
		1373	AV *av;
		1374
		1375	grp->errorno = errno;
		1376
1390	AV *av = newAV ();	1377	av = newAV ();
		1378	av_extend (av, items - 1);
1391		1379
1392	for (i = 1; i < items; ++i )	1380	for (i = 1; i < items; ++i )
1393	av_push (av, newSVsv (ST (i)));	1381	av_push (av, newSVsv (ST (i)));
1394		1382
1395	SvREFCNT_dec (grp->data);	1383	SvREFCNT_dec (grp->sv1);
1396	grp->data = (SV *)av;	1384	grp->sv1 = (SV *)av;
1397	}	1385	}
1398		1386
1399	void	1387	void
		1388	errno (aio_req grp, int errorno = errno)
		1389	CODE:
		1390	grp->errorno = errorno;
		1391
		1392	void
1400	feed_limit (aio_req grp, int limit)	1393	limit (aio_req grp, int limit)
1401	CODE:	1394	CODE:
1402	grp->fd2 = limit;	1395	eio_grp_limit (grp, limit);
1403	aio_grp_feed (grp);
1404		1396
1405	void	1397	void
1406	feed (aio_req grp, SV *callback=&PL_sv_undef)	1398	feed (aio_req grp, SV *callback=&PL_sv_undef)
1407	CODE:	1399	CODE:
1408	{	1400	{
1409	SvREFCNT_dec (grp->fh2);	1401	SvREFCNT_dec (grp->sv2);
1410	grp->fh2 = newSVsv (callback);	1402	grp->sv2 = newSVsv (callback);
		1403	grp->feed = aio_grp_feed;
1411		1404
1412	if (grp->fd2 <= 0)	1405	if (grp->int2 <= 0)
1413	grp->fd2 = 2;	1406	grp->int2 = 2;
1414		1407
1415	aio_grp_feed (grp);	1408	eio_grp_limit (grp, grp->int2);
1416	}	1409	}
1417		1410

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