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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.69 by root, Tue Oct 24 11:57:30 2006 UTC vs.
Revision 1.192 by root, Sun Jul 24 03:32:52 2011 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "schmorp.h"
14
15	#include <pthread.h>
16		10
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	14	#include <sys/types.h>
22	#include <sys/stat.h>	15	#include <sys/stat.h>
23	#include <limits.h>	16	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	17	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	18	#include <sched.h>
28		19
29	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
30	# if __linux
31	# include <sys/sendfile.h>
32	# elif __freebsd
33	# include <sys/socket.h>
34	# include <sys/uio.h>	21	# include <sys/mman.h>
35	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#else
		68
36	# include <sys/socket.h>	69	#include <sys/time.h>
37	# elif __solaris /* not yet */
38	# include <sys/sendfile.h>	70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	STRLEN stroffset; \
		113	SV *self;
		114
		115	#define EIO_NO_WRAPPERS 1
		116
		117	#include "libeio/config.h"
		118	#include "libeio/eio.h"
		119
		120	static int req_invoke (eio_req *req);
		121	#define EIO_FINISH(req) req_invoke (req)
		122	static void req_destroy (eio_req *grp);
		123	#define EIO_DESTROY(req) req_destroy (req)
		124
		125	#include "libeio/eio.c"
		126
		127	/* Linux/others */
		128	#ifndef O_ASYNC
		129	# define O_ASYNC 0
		130	#endif
		131	#ifndef O_DIRECT
		132	# define O_DIRECT 0
		133	#endif
		134	#ifndef O_NOATIME
		135	# define O_NOATIME 0
		136	#endif
		137
		138	/* POSIX */
		139	#ifndef O_CLOEXEC
		140	# define O_CLOEXEC 0
		141	#endif
		142	#ifndef O_NOFOLLOW
		143	# define O_NOFOLLOW 0
		144	#endif
		145	#ifndef O_NOCTTY
		146	# define O_NOCTTY 0
		147	#endif
		148	#ifndef O_NONBLOCK
		149	# define O_NONBLOCK 0
		150	#endif
		151	#ifndef O_EXEC
		152	# define O_EXEC 0
		153	#endif
		154	#ifndef O_SEARCH
		155	# define O_SEARCH 0
		156	#endif
		157	#ifndef O_DIRECTORY
		158	# define O_DIRECTORY 0
		159	#endif
		160	#ifndef O_DSYNC
		161	# define O_DSYNC 0
		162	#endif
		163	#ifndef O_RSYNC
		164	# define O_RSYNC 0
		165	#endif
		166	#ifndef O_SYNC
		167	# define O_SYNC 0
		168	#endif
		169	#ifndef O_TTY_INIT
		170	# define O_TTY_INIT 0
		171	#endif
		172
		173	#ifndef POSIX_FADV_NORMAL
		174	# define POSIX_FADV_NORMAL 0
		175	#endif
		176	#ifndef POSIX_FADV_SEQUENTIAL
		177	# define POSIX_FADV_SEQUENTIAL 0
		178	#endif
		179	#ifndef POSIX_FADV_RANDOM
		180	# define POSIX_FADV_RANDOM 0
		181	#endif
		182	#ifndef POSIX_FADV_NOREUSE
		183	# define POSIX_FADV_NOREUSE 0
		184	#endif
		185	#ifndef POSIX_FADV_WILLNEED
		186	# define POSIX_FADV_WILLNEED 0
		187	#endif
		188	#ifndef POSIX_FADV_DONTNEED
		189	# define POSIX_FADV_DONTNEED 0
		190	#endif
		191
		192	#if !HAVE_POSIX_FADVISE
		193	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		194	#endif
		195
		196	#ifndef POSIX_MADV_NORMAL
		197	# define POSIX_MADV_NORMAL 0
		198	#endif
		199	#ifndef POSIX_MADV_SEQUENTIAL
		200	# define POSIX_MADV_SEQUENTIAL 0
		201	#endif
		202	#ifndef POSIX_MADV_RANDOM
		203	# define POSIX_MADV_RANDOM 0
		204	#endif
		205	#ifndef POSIX_MADV_WILLNEED
		206	# define POSIX_MADV_WILLNEED 0
		207	#endif
		208	#ifndef POSIX_MADV_DONTNEED
		209	# define POSIX_MADV_DONTNEED 0
		210	#endif
		211
		212	#if !HAVE_POSIX_MADVISE
		213	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		214	#endif
		215
		216	#ifndef PROT_NONE
		217	# define PROT_NONE 0
		218	#endif
		219	#ifndef PROT_READ
		220	# define PROT_READ 0
		221	#endif
		222	#ifndef PROT_WRITE
		223	# define PROT_READ 0
		224	#endif
		225	#ifndef PROT_EXEC
		226	# define PROT_EXEC 0
		227	#endif
		228
		229	#ifndef ST_RDONLY
		230	# define ST_RDONLY 0
		231	#endif
		232	#ifndef ST_NOSUID
		233	# define ST_NOSUID 0
		234	#endif
		235	#ifndef ST_NODEV
		236	# define ST_NODEV 0
		237	#endif
		238	#ifndef ST_NOEXEC
		239	# define ST_NOEXEC 0
		240	#endif
		241	#ifndef ST_SYNCHRONOUS
		242	# define ST_SYNCHRONOUS 0
		243	#endif
		244	#ifndef ST_MANDLOCK
		245	# define ST_MANDLOCK 0
		246	#endif
		247	#ifndef ST_WRITE
		248	# define ST_WRITE 0
		249	#endif
		250	#ifndef ST_APPEND
		251	# define ST_APPEND 0
		252	#endif
		253	#ifndef ST_IMMUTABLE
		254	# define ST_IMMUTABLE 0
		255	#endif
		256	#ifndef ST_NOATIME
		257	# define ST_NOATIME 0
		258	#endif
		259	#ifndef ST_NODIRATIME
		260	# define ST_NODIRATIME 0
		261	#endif
		262	#ifndef ST_RELATIME
		263	# define ST_RELATIME 0
		264	#endif
		265
		266	#ifndef S_IFIFO
		267	# define S_IFIFO 0
		268	#endif
		269	#ifndef S_IFCHR
		270	# define S_IFCHR 0
		271	#endif
		272	#ifndef S_IFBLK
		273	# define S_IFBLK 0
		274	#endif
		275	#ifndef S_IFLNK
		276	# define S_IFLNK 0
		277	#endif
		278	#ifndef S_IFREG
		279	# define S_IFREG 0
		280	#endif
		281	#ifndef S_IFDIR
		282	# define S_IFDIR 0
		283	#endif
		284	#ifndef S_IFWHT
		285	# define S_IFWHT 0
		286	#endif
		287	#ifndef S_IFSOCK
		288	# define S_IFSOCK 0
		289	#endif
		290
		291	#ifndef MAP_ANONYMOUS
		292	# ifdef MAP_ANON
		293	# define MAP_ANONYMOUS MAP_ANON
39	# else	294	# else
40	# error sendfile support requested but not available	295	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
41	# endif	296	# endif
42	#endif	297	#endif
43		298	#ifndef MAP_HUGETLB
44	/* used for struct dirent, AIX doesn't provide it */	299	# define MAP_HUGETLB 0
45	#ifndef NAME_MAX
46	# define NAME_MAX 4096
47	#endif	300	#endif
48		301	#ifndef MAP_LOCKED
49	#if __ia64	302	# define MAP_LOCKED 0
50	# define STACKSIZE 65536
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52	# define STACKSIZE PTHREAD_STACK_MIN
53	#else
54	# define STACKSIZE 16384
55	#endif	303	#endif
		304	#ifndef MAP_NORESERVE
		305	# define MAP_NORESERVE 0
		306	#endif
		307	#ifndef MAP_POPULATE
		308	# define MAP_POPULATE 0
		309	#endif
		310	#ifndef MAP_NONBLOCK
		311	# define MAP_NONBLOCK 0
		312	#endif
56		313
57	/* buffer size for various temporary buffers */	314	#ifndef makedev
58	#define AIO_BUFSIZE 65536	315	# define makedev(maj,min) (((maj) << 8) | (min))
		316	#endif
		317	#ifndef major
		318	# define major(dev) ((dev) >> 8)
		319	#endif
		320	#ifndef minor
		321	# define minor(dev) ((dev) & 0xff)
		322	#endif
59		323
60	#define dBUF \	324	#ifndef PAGESIZE
61	char *aio_buf = malloc (AIO_BUFSIZE); \	325	# define PAGESIZE sysconf (_SC_PAGESIZE)
62	if (!aio_buf) \	326	#endif
63	return -1;
64
65	#define fBUF free (aio_buf)
66		327
67	enum {	328	enum {
68	REQ_QUIT,	329	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
69	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_BUSY,
79	};	330	};
80		331
81	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"
83
84	typedef struct aio_cb
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;
89	SV *fh, *fh2;
90	void *dataptr, *data2ptr;
91	Stat_t *statdata;
92	off_t offset;
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;
97	int type;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101
102	unsigned char flags;
103	unsigned char pri;
104
105	SV *self; /* the perl counterpart of this request, if any */
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
107	} aio_cb;
108
109	enum {
110	FLAG_CANCELLED = 0x01,
111	};
112
113	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	333	typedef eio_req *aio_req_ornot;
115		334
116	enum {	335	static SV *on_next_submit;
117	PRI_MIN = -4,	336	static int next_pri = EIO_PRI_DEFAULT;
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};
124
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126
127	static int started, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;	337	static int max_outstanding;
130	static int respipe [2];
131		338
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	339	static s_epipe respipe;
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif
137		340
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	341	static void req_destroy (aio_req req);
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
141
142	/*
143	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.
146	*/
147	typedef struct {
148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
149	int size;
150	} reqq;
151
152	static reqq req_queue;
153	static reqq res_queue;
154
155	int reqq_push (reqq *q, aio_req req)
156	{
157	int pri = req->pri;
158	req->next = 0;
159
160	if (q->qe[pri])
161	{
162	q->qe[pri]->next = req;
163	q->qe[pri] = req;
164	}
165	else
166	q->qe[pri] = q->qs[pri] = req;
167
168	return q->size++;
169	}
170
171	aio_req reqq_shift (reqq *q)
172	{
173	int pri;
174
175	if (!q->size)
176	return 0;
177
178	--q->size;
179
180	for (pri = NUM_PRI; pri--; )
181	{
182	aio_req req = q->qs[pri];
183
184	if (req)
185	{
186	if (!(q->qs[pri] = req->next))
187	q->qe[pri] = 0;
188
189	return req;
190	}
191	}
192
193	abort ();
194	}
195
196	static void req_invoke (aio_req req);	342	static void req_cancel (aio_req req);
197	static void req_free (aio_req req);	343
		344	static void want_poll (void)
		345	{
		346	/* write a dummy byte to the pipe so fh becomes ready */
		347	s_epipe_signal (&respipe);
		348	}
		349
		350	static void done_poll (void)
		351	{
		352	/* read any signals sent by the worker threads */
		353	s_epipe_drain (&respipe);
		354	}
198		355
199	/* must be called at most once */	356	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	357	static SV *req_sv (aio_req req, HV *stash)
201	{	358	{
202	if (!req->self)	359	if (!req->self)
203	{	360	{
204	req->self = (SV *)newHV ();	361	req->self = (SV *)newHV ();
205	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
206	}	363	}
207		364
208	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
209	}	366	}
210		367
211	static aio_req SvAIO_REQ (SV *sv)	368	static aio_req SvAIO_REQ (SV *sv)
212	{	369	{
213	MAGIC *mg;	370	MAGIC *mg;
214		371
215	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	372	if (!SvROK (sv)
		373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		374	&& SvSTASH (SvRV (sv)) != aio_req_stash
		375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
216	croak ("object of class " AIO_REQ_KLASS " expected");	376	croak ("object of class IO::AIO::REQ expected");
217		377
218	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
219		379
220	return mg ? (aio_req)mg->mg_ptr : 0;	380	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	381	}
222		382
223	static void aio_grp_feed (aio_req grp)	383	static void aio_grp_feed (aio_req grp)
224	{	384	{
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	385	if (grp->sv2 && SvOK (grp->sv2))
226	{	386	{
227	int old_len = grp->length;
228
229	if (grp->fh2 && SvOK (grp->fh2))
230	{
231	dSP;	387	dSP;
232		388
233	ENTER;	389	ENTER;
234	SAVETMPS;	390	SAVETMPS;
235	PUSHMARK (SP);	391	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	392	XPUSHs (req_sv (grp, aio_grp_stash));
237	PUTBACK;	393	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	395	SPAGAIN;
240	FREETMPS;	396	FREETMPS;
241	LEAVE;	397	LEAVE;
242	}
243
244	/* stop if no progress has been made */
245	if (old_len == grp->length)
246	{
247	SvREFCNT_dec (grp->fh2);
248	grp->fh2 = 0;
249	break;
250	}
251	}	398	}
252	}	399	}
253		400
254	static void aio_grp_dec (aio_req grp)	401	static void req_submit (eio_req *req)
255	{	402	{
256	--grp->length;	403	eio_submit (req);
257		404
258	/* call feeder, if applicable */	405	if (expect_false (on_next_submit))
259	aio_grp_feed (grp);
260
261	/* finish, if done */
262	if (!grp->length && grp->fd)
263	{	406	{
264	req_invoke (grp);	407	dSP;
265	req_free (grp);	408	SV *cb = sv_2mortal (on_next_submit);
		409
		410	on_next_submit = 0;
		411
		412	PUSHMARK (SP);
		413	PUTBACK;
		414	call_sv (cb, G_DISCARD | G_EVAL);
266	}	415	}
267	}	416	}
268		417
269	static void poll_wait ()	418	static int req_invoke (eio_req *req)
270	{	419	{
271	fd_set rfd;	420	if (req->flags & FLAG_SV2_RO_OFF)
		421	SvREADONLY_off (req->sv2);
272		422
273	while (nreqs)	423	if (!EIO_CANCELLED (req) && req->callback)
274	{	424	{
275	int size;
276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)
295	{
296	dSP;	425	dSP;
297		426	static SV *sv_result_cache; /* caches the result integer SV */
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	427	SV *sv_result;
299	{
300	errno = req->errorno;
301		428
302	ENTER;	429	ENTER;
303	SAVETMPS;	430	SAVETMPS;
304	PUSHMARK (SP);	431	PUSHMARK (SP);
305	EXTEND (SP, 1);	432	EXTEND (SP, 1);
306		433
		434	/* do not recreate the result IV from scratch each time */
		435	if (expect_true (sv_result_cache))
		436	{
		437	sv_result = sv_result_cache; sv_result_cache = 0;
		438	SvIV_set (sv_result, req->result);
		439	SvIOK_only (sv_result);
		440	}
		441	else
		442	{
		443	sv_result = newSViv (req->result);
		444	SvREADONLY_on (sv_result);
		445	}
		446
307	switch (req->type)	447	switch (req->type)
308	{	448	{
309	case REQ_READDIR:	449	case EIO_READDIR:
310	{	450	{
311	SV *rv = &PL_sv_undef;	451	SV *rv = &PL_sv_undef;
312		452
313	if (req->result >= 0)	453	if (req->result >= 0)
314	{	454	{
		455	int i;
315	char *buf = req->data2ptr;	456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
316	AV *av = newAV ();	458	AV *av = newAV ();
317		459
318	while (req->result)	460	av_extend (av, req->result - 1);
		461
		462	for (i = 0; i < req->result; ++i)
319	{	463	{
		464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		467
		468	if (req->int1 & EIO_READDIR_CUSTOM2)
		469	{
		470	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		471	AV *avent = newAV ();
		472
		473	av_extend (avent, 2);
		474
		475	if (!sv_type [ent->type])
		476	{
		477	sv_type [ent->type] = newSViv (ent->type);
		478	SvREADONLY_on (sv_type [ent->type]);
		479	}
		480
		481	av_store (avent, 0, namesv);
		482	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		483	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		484
		485	av_store (av, i, newRV_noinc ((SV *)avent));
		486	}
		487	else
		488	av_store (av, i, namesv);
		489
		490	++ent;
		491	}
		492	else
		493	{
320	SV *sv = newSVpv (buf, 0);	494	SV *name = newSVpv (names, 0);
321
322	av_push (av, sv);	495	av_store (av, i, name);
323	buf += SvCUR (sv) + 1;	496	names += SvCUR (name) + 1;
324	req->result--;	497	}
325	}	498	}
326		499
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	500	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	501	}
329		502
330	PUSHs (rv);	503	PUSHs (rv);
		504
		505	if (req->int1 & EIO_READDIR_CUSTOM1)
		506	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
331	}	507	}
332	break;	508	break;
333		509
334	case REQ_OPEN:	510	case EIO_OPEN:
335	{	511	{
336	/* convert fd to fh */	512	/* convert fd to fh */
337	SV *fh;	513	SV *fh = &PL_sv_undef;
338		514
339	PUSHs (sv_2mortal (newSViv (req->result)));	515	if (req->result >= 0)
340	PUTBACK;	516	{
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	517	GV *gv = (GV *)sv_newmortal ();
342	SPAGAIN;	518	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		519	char sym [64];
		520	int symlen;
		521
		522	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		523	gv_init (gv, aio_stash, sym, symlen, 0);
343		524
344	fh = SvREFCNT_inc (POPs);	525	symlen = snprintf (
		526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
345		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
346	PUSHMARK (SP);	537	PUSHs (fh);
347	XPUSHs (sv_2mortal (fh));
348	}	538	}
349	break;	539	break;
350		540
		541	case EIO_STATVFS:
		542	case EIO_FSTATVFS:
		543	{
		544	SV *rv = &PL_sv_undef;
		545
		546	#ifndef _WIN32
		547	if (req->result >= 0)
		548	{
		549	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		550	HV *hv = newHV ();
		551
		552	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		553
		554	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		555	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		556	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		557	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		558	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		559	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		560	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		561	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		562	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		563	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		564	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		565	}
		566	#endif
		567
		568	PUSHs (rv);
		569	}
		570
		571	break;
		572
351	case REQ_GROUP:	573	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	574	req->int1 = 2; /* mark group as finished */
353		575
354	if (req->data)	576	if (req->sv1)
355	{	577	{
356	int i;	578	int i;
357	AV *av = (AV *)req->data;	579	AV *av = (AV *)req->sv1;
358		580
359	EXTEND (SP, AvFILL (av) + 1);	581	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	582	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	583	PUSHs (*av_fetch (av, i, 0));
362	}	584	}
363	break;	585	break;
364		586
365	case REQ_NOP:	587	case EIO_NOP:
366	case REQ_BUSY:	588	case EIO_BUSY:
367	break;	589	break;
368		590
		591	case EIO_READLINK:
		592	case EIO_REALPATH:
		593	if (req->result > 0)
		594	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		595	break;
		596
		597	case EIO_STAT:
		598	case EIO_LSTAT:
		599	case EIO_FSTAT:
		600	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		601	PL_laststatval = req->result;
		602	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		603	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		604	PUSHs (sv_result);
		605	break;
		606
		607	case EIO_READ:
		608	{
		609	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		610	*SvEND (req->sv2) = 0;
		611	SvPOK_only (req->sv2);
		612	SvSETMAGIC (req->sv2);
		613	PUSHs (sv_result);
		614	}
		615	break;
		616
		617	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		618	if (req->result > 0)
		619	SvIV_set (sv_result, 0);
		620	/* FALLTHROUGH */
		621
369	default:	622	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	623	PUSHs (sv_result);
371	break;	624	break;
372	}	625	}
373		626
		627	errno = req->errorno;
374		628
375	PUTBACK;	629	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	630	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	631	SPAGAIN;
		632
		633	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		634	SvREFCNT_dec (sv_result);
		635	else
		636	sv_result_cache = sv_result;
378		637
379	FREETMPS;	638	FREETMPS;
380	LEAVE;	639	LEAVE;
		640
		641	PUTBACK;
381	}	642	}
382		643
383	if (req->grp)	644	return !!SvTRUE (ERRSV);
384	{
385	aio_req grp = req->grp;
386
387	/* unlink request */
388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
390
391	if (grp->grp_first == req)
392	grp->grp_first = req->grp_next;
393
394	aio_grp_dec (grp);
395	}
396
397	if (SvTRUE (ERRSV))
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	645	}
403		646
404	static void req_free (aio_req req)	647	static void req_destroy (aio_req req)
405	{	648	{
406	if (req->self)	649	if (req->self)
407	{	650	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	651	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	652	SvREFCNT_dec (req->self);
410	}	653	}
411		654
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	655	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	656	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	657	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420		658
421	Safefree (req);	659	Safefree (req);
422	}	660	}
423		661
424	static void req_cancel (aio_req req)	662	static void req_cancel_subs (aio_req grp)
425	{	663	{
426	req->flags |= FLAG_CANCELLED;
427
428	if (req->type == REQ_GROUP)	664	if (grp->type != EIO_GROUP)
		665	return;
		666
		667	SvREFCNT_dec (grp->sv2);
		668	grp->sv2 = 0;
		669
		670	eio_grp_cancel (grp);
		671	}
		672
		673	static void create_respipe (void)
		674	{
		675	if (s_epipe_renew (&respipe))
		676	croak ("IO::AIO: unable to initialize result pipe");
		677	}
		678
		679	static void poll_wait (void)
		680	{
		681	while (eio_nreqs ())
429	{	682	{
430	aio_req sub;	683	int size;
431		684
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	685	X_LOCK (reslock);
433	req_cancel (sub);	686	size = res_queue.size;
		687	X_UNLOCK (reslock);
		688
		689	if (size)
		690	return;
		691
		692	etp_maybe_start_thread ();
		693
		694	s_epipe_wait (&respipe);
434	}	695	}
435	}	696	}
436		697
437	static int poll_cb ()	698	static int poll_cb (void)
438	{	699	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	700	for (;;)
445	{	701	{
446	pthread_mutex_lock (&reslock);	702	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		703
449	if (req)	704	if (res > 0)
450	{
451	if (!res_queue.size)
452	{
453	/* read any signals sent by the worker threads */
454	char buf [32];
455	while (read (respipe [0], buf, 32) == 32)
456	;
457	}
458	}
459
460	pthread_mutex_unlock (&reslock);
461
462	if (!req)
463	break;	705	croak (0);
464		706
465	--nreqs;	707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
466		709
467	if (req->type == REQ_QUIT)	710	poll_wait ();
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{
471	req->fd = 1; /* mark request as delayed */
472	continue;
473	}
474	else
475	{
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	711	}
496
497	return count;
498	}	712	}
499		713
500	static void *aio_proc(void *arg);	714	static void ecb_cold
501		715	reinit (void)
502	static void start_thread (void)
503	{	716	{
504	sigset_t fullsigset, oldsigset;	717	create_respipe ();
505	pthread_t tid;
506	pthread_attr_t attr;
507		718
508	pthread_attr_init (&attr);	719	if (eio_init (want_poll, done_poll) < 0)
509	pthread_attr_setstacksize (&attr, STACKSIZE);	720	croak ("IO::AIO: unable to initialise eio library");
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}
520
521	static void req_send (aio_req req)
522	{
523	while (started < wanted && nreqs >= started)
524	start_thread ();
525
526	++nreqs;
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{
572	end_thread ();
573	cur--;
574	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}
582
583	static void create_pipe ()
584	{
585	if (pipe (respipe))
586	croak ("unable to initialize result pipe");
587
588	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
589	croak ("cannot set result pipe to nonblocking mode");
590
591	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593	}	721	}
594		722
595	/*****************************************************************************/	723	/*****************************************************************************/
596	/* work around various missing functions */
597		724
598	#if !HAVE_PREADWRITE	725	#if !_POSIX_MAPPED_FILES
599	# define pread aio_pread	726	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
600	# define pwrite aio_pwrite	727	# define munmap(addr,length) (errno = ENOSYS, -1)
601
602	/*
603	* make our pread/pwrite safe against themselves, but not against
604	* normal read/write by using a mutex. slows down execution a lot,
605	* but that's your problem, not mine.
606	*/
607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
608
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{
611	ssize_t res;
612	off_t ooffset;
613
614	pthread_mutex_lock (&preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);
620
621	return res;
622	}
623
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{
626	ssize_t res;
627	off_t ooffset;
628
629	pthread_mutex_lock (&preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);
635
636	return res;
637	}
638	#endif
639
640	#if !HAVE_FDATASYNC
641	# define fdatasync fsync
642	#endif
643
644	#if !HAVE_READAHEAD
645	# define readahead aio_readahead
646
647	static ssize_t readahead (int fd, off_t offset, size_t count)
648	{
649	dBUF;
650
651	while (count > 0)
652	{
653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
654
655	pread (fd, aio_buf, len, offset);
656	offset += len;
657	count -= len;
658	}
659
660	fBUF;
661
662	errno = 0;
663	}
664	#endif
665
666	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r
668
669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
670
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672	{
673	struct dirent *e;
674	int errorno;
675
676	pthread_mutex_lock (&readdirlock);
677
678	e = readdir (dirp);
679	errorno = errno;
680
681	if (e)
682	{
683	*res = ent;
684	strcpy (ent->d_name, e->d_name);
685	}
686	else
687	*res = 0;
688
689	pthread_mutex_unlock (&readdirlock);
690
691	errno = errorno;
692	return e ? 0 : -1;
693	}
694	#endif
695
696	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
698	{
699	ssize_t res;
700
701	if (!count)
702	return 0;
703
704	#if HAVE_SENDFILE
705	# if __linux
706	res = sendfile (ofd, ifd, &offset, count);
707
708	# elif __freebsd
709	/*
710	* Of course, the freebsd sendfile is a dire hack with no thoughts
711	* wasted on making it similar to other I/O functions.
712	*/
713	{
714	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716
717	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
719	res = sbytes;
720	}
721
722	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);
724
725	# elif __solaris
726	{
727	struct sendfilevec vec;
728	size_t sbytes;
729
730	vec.sfv_fd = ifd;
731	vec.sfv_flag = 0;
732	vec.sfv_off = offset;
733	vec.sfv_len = count;
734
735	res = sendfilev (ofd, &vec, 1, &sbytes);
736
737	if (res < 0 && sbytes)
738	res = sbytes;
739	}
740
741	# endif	728	#endif
742	#else
743	res = -1;
744	errno = ENOSYS;
745	#endif
746		729
747	if (res < 0	730	#if !_POSIX_MEMORY_PROTECTION
748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	731	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
749	#if __solaris	732	# define PROT_NONE 0
750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	733	# define PROT_WRITE 0
		734	# define MAP_PRIVATE 0
		735	# define MAP_SHARED 0
		736	# define MAP_FIXED 0
751	#endif	737	#endif
752	)
753	)
754	{
755	/* emulate sendfile. this is a major pain in the ass */
756	dBUF;
757		738
758	res = 0;	739	#define MMAP_MAGIC PERL_MAGIC_ext
759		740
760	while (count)	741	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
761	{
762	ssize_t cnt;
763
764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
765
766	if (cnt <= 0)
767	{
768	if (cnt && !res) res = -1;
769	break;
770	}
771
772	cnt = write (ofd, aio_buf, cnt);
773
774	if (cnt <= 0)
775	{
776	if (cnt && !res) res = -1;
777	break;
778	}
779
780	offset += cnt;
781	res += cnt;
782	count -= cnt;
783	}
784
785	fBUF;
786	}
787
788	return res;
789	}
790
791	/* read a full directory */
792	static int scandir_ (const char *path, void **namesp)
793	{	742	{
794	DIR *dirp;	743	int old_errno = errno;
795	union	744	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
796	{
797	struct dirent d;
798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
799	} *u;
800	struct dirent *entp;
801	char *name, *names;
802	int memlen = 4096;
803	int memofs = 0;
804	int res = 0;
805	int errorno;
806
807	dirp = opendir (path);
808	if (!dirp)
809	return -1;
810
811	u = malloc (sizeof (*u));
812	names = malloc (memlen);
813
814	if (u && names)
815	for (;;)
816	{
817	errno = 0;
818	readdir_r (dirp, &u->d, &entp);
819
820	if (!entp)
821	break;
822
823	name = entp->d_name;
824
825	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
826	{
827	int len = strlen (name) + 1;
828
829	res++;
830
831	while (memofs + len > memlen)
832	{
833	memlen *= 2;
834	names = realloc (names, memlen);
835	if (!names)
836	break;
837	}
838
839	memcpy (names + memofs, name, len);
840	memofs += len;
841	}
842	}
843
844	errorno = errno;	745	errno = old_errno;
845	free (u);
846	closedir (dirp);
847		746
848	if (errorno)	747	mg->mg_obj = 0; /* just in case */
849	{
850	free (names);
851	errno = errorno;
852	res = -1;
853	}
854		748
855	*namesp = (void *)names;	749	SvREADONLY_off (sv);
		750
		751	if (SvPVX (sv) != mg->mg_ptr)
		752	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		753
		754	SvCUR_set (sv, 0);
		755	SvPVX (sv) = 0;
		756	SvOK_off (sv);
		757
856	return res;	758	return 0;
857	}	759	}
		760
		761	static MGVTBL mmap_vtbl = {
		762	0, 0, 0, 0, mmap_free
		763	};
858		764
859	/*****************************************************************************/	765	/*****************************************************************************/
860		766
861	static void *aio_proc (void *thr_arg)	767	static SV * get_cb (SV *cb_sv)
862	{	768	{
863	aio_req req;	769	SvGETMAGIC (cb_sv);
864	int type;	770	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
865
866	do
867	{
868	pthread_mutex_lock (&reqlock);
869
870	for (;;)
871	{
872	req = reqq_shift (&req_queue);
873
874	if (req)
875	break;
876
877	pthread_cond_wait (&reqwait, &reqlock);
878	}
879
880	pthread_mutex_unlock (&reqlock);
881
882	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884
885	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)
887	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
890
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
893
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
897
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
905
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
909
910	case REQ_BUSY:
911	{
912	struct timeval tv;
913
914	tv.tv_sec = req->fd;
915	tv.tv_usec = req->fd2;
916
917	req->result = select (0, 0, 0, 0, &tv);
918	}
919
920	case REQ_GROUP:
921	case REQ_NOP:
922	case REQ_QUIT:
923	break;
924
925	default:
926	req->result = ENOSYS;
927	break;
928	}
929
930	req->errorno = errno;
931
932	pthread_mutex_lock (&reslock);
933
934	if (!reqq_push (&res_queue, req))
935	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);
937
938	pthread_mutex_unlock (&reslock);
939	}
940	while (type != REQ_QUIT);
941
942	return 0;
943	}
944
945	/*****************************************************************************/
946
947	static void atfork_prepare (void)
948	{
949	pthread_mutex_lock (&reqlock);
950	pthread_mutex_lock (&reslock);
951	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);
953	#endif
954	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);
956	#endif
957	}
958
959	static void atfork_parent (void)
960	{
961	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);
963	#endif
964	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);
966	#endif
967	pthread_mutex_unlock (&reslock);
968	pthread_mutex_unlock (&reqlock);
969	}
970
971	static void atfork_child (void)
972	{
973	aio_req prv;
974
975	started = 0;
976
977	while (prv = reqq_shift (&req_queue))
978	req_free (prv);
979
980	while (prv = reqq_shift (&res_queue))
981	req_free (prv);
982
983	close (respipe [0]);
984	close (respipe [1]);
985	create_pipe ();
986
987	atfork_parent ();
988	}	771	}
989		772
990	#define dREQ \	773	#define dREQ \
		774	SV *cb_cv; \
991	aio_req req; \	775	aio_req req; \
992	int req_pri = next_pri; \	776	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \	777	next_pri = EIO_PRI_DEFAULT; \
994	\	778	\
995	if (SvOK (callback) && !SvROK (callback)) \	779	cb_cv = get_cb (callback); \
996	croak ("callback must be undef or of reference type"); \
997	\	780	\
998	Newz (0, req, 1, aio_cb); \	781	Newz (0, req, 1, eio_req); \
999	if (!req) \	782	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \	783	croak ("out of memory during eio_req allocation"); \
1001	\	784	\
1002	req->callback = newSVsv (callback); \	785	req->callback = SvREFCNT_inc (cb_cv); \
1003	req->pri = req_pri	786	req->pri = req_pri
1004		787
1005	#define REQ_SEND \	788	#define REQ_SEND \
		789	PUTBACK; \
1006	req_send (req); \	790	req_submit (req); \
		791	SPAGAIN; \
1007	\	792	\
1008	if (GIMME_V != G_VOID) \	793	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));	794	XPUSHs (req_sv (req, aio_req_stash));
1010		795
1011	MODULE = IO::AIO PACKAGE = IO::AIO	796	MODULE = IO::AIO PACKAGE = IO::AIO
1012		797
1013	PROTOTYPES: ENABLE	798	PROTOTYPES: ENABLE
1014		799
1015	BOOT:	800	BOOT:
1016	{	801	{
		802	static const struct {
		803	const char *name;
		804	IV iv;
		805	} *civ, const_iv[] = {
		806	# define const_niv(name, value) { # name, (IV) value },
		807	# define const_iv(name) { # name, (IV) name },
		808	# define const_eio(name) { # name, (IV) EIO_ ## name },
		809	const_iv (EXDEV)
		810	const_iv (ENOSYS)
		811	const_iv (O_RDONLY)
		812	const_iv (O_WRONLY)
		813	const_iv (O_RDWR)
		814	const_iv (O_CREAT)
		815	const_iv (O_TRUNC)
		816	const_iv (O_EXCL)
		817	const_iv (O_APPEND)
		818
		819	const_iv (O_ASYNC)
		820	const_iv (O_DIRECT)
		821	const_iv (O_NOATIME)
		822
		823	const_iv (O_CLOEXEC)
		824	const_iv (O_NOCTTY)
		825	const_iv (O_NOFOLLOW)
		826	const_iv (O_NONBLOCK)
		827	const_iv (O_EXEC)
		828	const_iv (O_SEARCH)
		829	const_iv (O_DIRECTORY)
		830	const_iv (O_DSYNC)
		831	const_iv (O_RSYNC)
		832	const_iv (O_SYNC)
		833	const_iv (O_TTY_INIT)
		834
		835	const_iv (S_IFIFO)
		836	const_iv (S_IFCHR)
		837	const_iv (S_IFBLK)
		838	const_iv (S_IFLNK)
		839	const_iv (S_IFREG)
		840	const_iv (S_IFDIR)
		841	const_iv (S_IFWHT)
		842	const_iv (S_IFSOCK)
		843	const_iv (S_IFMT)
		844
		845	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		846	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		847	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		848	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		849	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		850	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		851
		852	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		853	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		854	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		855	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		856	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		857
		858	const_iv (ST_RDONLY)
		859	const_iv (ST_NOSUID)
		860	const_iv (ST_NODEV)
		861	const_iv (ST_NOEXEC)
		862	const_iv (ST_SYNCHRONOUS)
		863	const_iv (ST_MANDLOCK)
		864	const_iv (ST_WRITE)
		865	const_iv (ST_APPEND)
		866	const_iv (ST_IMMUTABLE)
		867	const_iv (ST_NOATIME)
		868	const_iv (ST_NODIRATIME)
		869	const_iv (ST_RELATIME)
		870
		871	const_iv (PROT_NONE)
		872	const_iv (PROT_EXEC)
		873	const_iv (PROT_READ)
		874	const_iv (PROT_WRITE)
		875
		876	/*const_iv (MAP_FIXED)*/
		877	const_iv (MAP_PRIVATE)
		878	const_iv (MAP_SHARED)
		879	const_iv (MAP_ANONYMOUS)
		880
		881	/* linuxish */
		882	const_iv (MAP_HUGETLB)
		883	const_iv (MAP_LOCKED)
		884	const_iv (MAP_NORESERVE)
		885	const_iv (MAP_POPULATE)
		886	const_iv (MAP_NONBLOCK)
		887
		888	const_eio (MCL_FUTURE)
		889	const_eio (MCL_CURRENT)
		890
		891	const_eio (MS_ASYNC)
		892	const_eio (MS_INVALIDATE)
		893	const_eio (MS_SYNC)
		894
		895	const_eio (MT_MODIFY)
		896
		897	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		898	const_eio (SYNC_FILE_RANGE_WRITE)
		899	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		900
		901	const_eio (FALLOC_FL_KEEP_SIZE)
		902
		903	const_eio (READDIR_DENTS)
		904	const_eio (READDIR_DIRS_FIRST)
		905	const_eio (READDIR_STAT_ORDER)
		906	const_eio (READDIR_FOUND_UNKNOWN)
		907
		908	const_eio (DT_UNKNOWN)
		909	const_eio (DT_FIFO)
		910	const_eio (DT_CHR)
		911	const_eio (DT_DIR)
		912	const_eio (DT_BLK)
		913	const_eio (DT_REG)
		914	const_eio (DT_LNK)
		915	const_eio (DT_SOCK)
		916	const_eio (DT_WHT)
		917	};
		918
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	919	aio_stash = gv_stashpv ("IO::AIO" , 1);
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	920	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	921	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1021		922
1022	create_pipe ();	923	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	924	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1024	}
1025		925
		926	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		927
		928	reinit ();
		929	}
		930
1026	void	931	void
1027	min_parallel (nthreads)	932	reinit ()
1028	int nthreads	933	PROTOTYPE:
		934	CODE:
		935	reinit ();
		936
		937	void
		938	max_poll_reqs (unsigned int nreqs)
1029	PROTOTYPE: $	939	PROTOTYPE: $
		940	CODE:
		941	eio_set_max_poll_reqs (nreqs);
1030		942
1031	void	943	void
1032	max_parallel (nthreads)	944	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	945	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	946	CODE:
1041	RETVAL = max_outstanding;	947	eio_set_max_poll_time (nseconds);
		948
		949	void
		950	min_parallel (unsigned int nthreads)
		951	PROTOTYPE: $
		952	CODE:
		953	eio_set_min_parallel (nthreads);
		954
		955	void
		956	max_parallel (unsigned int nthreads)
		957	PROTOTYPE: $
		958	CODE:
		959	eio_set_max_parallel (nthreads);
		960
		961	void
		962	max_idle (unsigned int nthreads)
		963	PROTOTYPE: $
		964	CODE:
		965	eio_set_max_idle (nthreads);
		966
		967	void
		968	idle_timeout (unsigned int seconds)
		969	PROTOTYPE: $
		970	CODE:
		971	eio_set_idle_timeout (seconds);
		972
		973	void
		974	max_outstanding (unsigned int maxreqs)
		975	PROTOTYPE: $
		976	CODE:
1042	max_outstanding = nreqs;	977	max_outstanding = maxreqs;
1043		978
1044	void	979	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	980	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1046	SV * pathname
1047	int flags
1048	int mode
1049	SV * callback
1050	PROTOTYPE: $$$;$
1051	PPCODE:	981	PPCODE:
1052	{	982	{
1053	dREQ;	983	dREQ;
1054		984
1055	req->type = REQ_OPEN;	985	req->type = EIO_OPEN;
1056	req->data = newSVsv (pathname);	986	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	987	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	988	req->int1 = flags;
1059	req->mode = mode;	989	req->int2 = mode;
1060		990
1061	REQ_SEND;	991	REQ_SEND;
1062	}	992	}
1063		993
1064	void	994	void
1065	aio_close (fh,callback=&PL_sv_undef)	995	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$
1069	ALIAS:	996	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC	997	aio_fsync = EIO_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC	998	aio_fdatasync = EIO_FDATASYNC
		999	aio_syncfs = EIO_SYNCFS
1073	PPCODE:	1000	PPCODE:
1074	{	1001	{
		1002	int fd = s_fileno_croak (fh, 0);
1075	dREQ;	1003	dREQ;
1076		1004
1077	req->type = ix;	1005	req->type = ix;
1078	req->fh = newSVsv (fh);	1006	req->sv1 = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1007	req->int1 = fd;
1080		1008
1081	REQ_SEND (req);	1009	REQ_SEND (req);
1082	}	1010	}
1083		1011
1084	void	1012	void
		1013	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1014	PPCODE:
		1015	{
		1016	int fd = s_fileno_croak (fh, 0);
		1017	dREQ;
		1018
		1019	req->type = EIO_SYNC_FILE_RANGE;
		1020	req->sv1 = newSVsv (fh);
		1021	req->int1 = fd;
		1022	req->offs = offset;
		1023	req->size = nbytes;
		1024	req->int2 = flags;
		1025
		1026	REQ_SEND (req);
		1027	}
		1028
		1029	void
		1030	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1031	PPCODE:
		1032	{
		1033	int fd = s_fileno_croak (fh, 0);
		1034	dREQ;
		1035
		1036	req->type = EIO_FALLOCATE;
		1037	req->sv1 = newSVsv (fh);
		1038	req->int1 = fd;
		1039	req->int2 = mode;
		1040	req->offs = offset;
		1041	req->size = len;
		1042
		1043	REQ_SEND (req);
		1044	}
		1045
		1046	void
		1047	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1048	PPCODE:
		1049	{
		1050	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1051	int fd = s_fileno_croak (fh, 0);
		1052	dREQ;
		1053
		1054	if (expect_false (close_fd < 0))
		1055	{
		1056	int pipefd [2];
		1057
		1058	if (
		1059	#ifdef _WIN32
		1060	_pipe (pipefd, 1, _O_BINARY) < 0
		1061	#else
		1062	pipe (pipefd) < 0
		1063	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1064	#endif
		1065	|| close (pipefd [1]) < 0
		1066	)
		1067	abort (); /*D*/
		1068
		1069	close_fd = pipefd [0];
		1070	}
		1071
		1072	req->type = EIO_DUP2;
		1073	req->int1 = close_fd;
		1074	req->sv2 = newSVsv (fh);
		1075	req->int2 = fd;
		1076
		1077	REQ_SEND (req);
		1078	}
		1079
		1080	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1081	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1086	SV * fh
1087	UV offset
1088	UV length
1089	SV * data
1090	UV dataoffset
1091	SV * callback
1092	ALIAS:	1082	ALIAS:
1093	aio_read = REQ_READ	1083	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	1084	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:	1085	PPCODE:
1097	{	1086	{
1098	aio_req req;
1099	STRLEN svlen;	1087	STRLEN svlen;
		1088	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1100	char *svptr = SvPVbyte (data, svlen);	1089	char *svptr = SvPVbyte (data, svlen);
1101		1090	UV len = SvUV (length);
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104		1091
1105	if (dataoffset < 0)	1092	if (dataoffset < 0)
1106	dataoffset += svlen;	1093	dataoffset += svlen;
1107		1094
1108	if (dataoffset < 0 || dataoffset > svlen)	1095	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	1096	croak ("dataoffset outside of data scalar");
1110		1097
1111	if (ix == REQ_WRITE)	1098	if (ix == EIO_WRITE)
1112	{	1099	{
1113	/* write: check length and adjust. */	1100	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	1101	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	1102	len = svlen - dataoffset;
1116	}	1103	}
1117	else	1104	else
1118	{	1105	{
1119	/* read: grow scalar as necessary */	1106	/* read: check type and grow scalar as necessary */
		1107	SvUPGRADE (data, SVt_PV);
1120	svptr = SvGROW (data, length + dataoffset);	1108	svptr = SvGROW (data, len + dataoffset + 1);
1121	}	1109	}
1122
1123	if (length < 0)
1124	croak ("length must not be negative");
1125		1110
1126	{	1111	{
1127	dREQ;	1112	dREQ;
1128		1113
1129	req->type = ix;	1114	req->type = ix;
1130	req->fh = newSVsv (fh);	1115	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1116	req->int1 = fd;
1132	: IoOFP (sv_2io (fh)));	1117	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	1118	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	1119	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	1120	req->ptr2 = (char *)svptr + dataoffset;
		1121	req->stroffset = dataoffset;
1137		1122
1138	if (!SvREADONLY (data))	1123	if (!SvREADONLY (data))
1139	{	1124	{
1140	SvREADONLY_on (data);	1125	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	1126	req->flags |= FLAG_SV2_RO_OFF;
1142	}	1127	}
1143		1128
1144	REQ_SEND;	1129	REQ_SEND;
1145	}	1130	}
1146	}	1131	}
1147		1132
1148	void	1133	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1134	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1150	SV * out_fh	1135	ALIAS:
1151	SV * in_fh	1136	aio_readlink = EIO_READLINK
1152	UV in_offset	1137	aio_realpath = EIO_REALPATH
1153	UV length
1154	SV * callback
1155	PROTOTYPE: $$$$;$
1156	PPCODE:	1138	PPCODE:
1157	{	1139	{
		1140	dREQ;
		1141
		1142	req->type = ix;
		1143	req->sv1 = newSVsv (path);
		1144	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1145
		1146	REQ_SEND;
		1147	}
		1148
		1149	void
		1150	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1151	PPCODE:
		1152	{
		1153	int ifd = s_fileno_croak (in_fh , 0);
		1154	int ofd = s_fileno_croak (out_fh, 1);
1158	dREQ;	1155	dREQ;
1159		1156
1160	req->type = REQ_SENDFILE;	1157	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	1158	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1159	req->int1 = ofd;
1163	req->fh2 = newSVsv (in_fh);	1160	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1161	req->int2 = ifd;
1165	req->offset = in_offset;	1162	req->offs = in_offset;
1166	req->length = length;	1163	req->size = length;
1167		1164
1168	REQ_SEND;	1165	REQ_SEND;
1169	}	1166	}
1170		1167
1171	void	1168	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1169	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$
1178	PPCODE:	1170	PPCODE:
1179	{	1171	{
		1172	int fd = s_fileno_croak (fh, 0);
1180	dREQ;	1173	dREQ;
1181		1174
1182	req->type = REQ_READAHEAD;	1175	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	1176	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1177	req->int1 = fd;
1185	req->offset = offset;	1178	req->offs = offset;
1186	req->length = length;	1179	req->size = length;
1187		1180
1188	REQ_SEND;	1181	REQ_SEND;
1189	}	1182	}
1190		1183
1191	void	1184	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	1185	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	1186	ALIAS:
1196	aio_stat = REQ_STAT	1187	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	1188	aio_lstat = EIO_LSTAT
		1189	aio_statvfs = EIO_STATVFS
1198	PPCODE:	1190	PPCODE:
1199	{	1191	{
1200	dREQ;	1192	dREQ;
1201		1193
1202	New (0, req->statdata, 1, Stat_t);	1194	req->sv1 = newSVsv (fh_or_path);
1203	if (!req->statdata)
1204	{
1205	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");
1207	}
1208		1195
1209	if (SvPOK (fh_or_path))	1196	if (SvPOK (req->sv1))
1210	{	1197	{
1211	req->type = ix;	1198	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	1199	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	1200	}
1215	else	1201	else
1216	{	1202	{
1217	req->type = REQ_FSTAT;	1203	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1218	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1204	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	1205	}
1221		1206
1222	REQ_SEND;	1207	REQ_SEND;
1223	}	1208	}
1224		1209
		1210	UV
		1211	major (UV dev)
		1212	ALIAS:
		1213	minor = 1
		1214	CODE:
		1215	RETVAL = ix ? major (dev) : minor (dev);
		1216	OUTPUT:
		1217	RETVAL
		1218
		1219	UV
		1220	makedev (UV maj, UV min)
		1221	CODE:
		1222	RETVAL = makedev (maj, min);
		1223	OUTPUT:
		1224	RETVAL
		1225
1225	void	1226	void
		1227	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1233	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1234	req->sv1 = newSVsv (fh_or_path);
		1235
		1236	if (SvPOK (req->sv1))
		1237	{
		1238	req->type = EIO_UTIME;
		1239	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1240	}
		1241	else
		1242	{
		1243	req->type = EIO_FUTIME;
		1244	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1245	}
		1246
		1247	REQ_SEND;
		1248	}
		1249
		1250	void
		1251	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1252	PPCODE:
		1253	{
		1254	dREQ;
		1255
		1256	req->sv1 = newSVsv (fh_or_path);
		1257	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1258
		1259	if (SvPOK (req->sv1))
		1260	{
		1261	req->type = EIO_TRUNCATE;
		1262	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1263	}
		1264	else
		1265	{
		1266	req->type = EIO_FTRUNCATE;
		1267	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1268	}
		1269
		1270	REQ_SEND;
		1271	}
		1272
		1273	void
		1274	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1275	ALIAS:
		1276	aio_chmod = EIO_CHMOD
		1277	aio_mkdir = EIO_MKDIR
		1278	PPCODE:
		1279	{
		1280	dREQ;
		1281
		1282	req->int2 = mode;
		1283	req->sv1 = newSVsv (fh_or_path);
		1284
		1285	if (SvPOK (req->sv1))
		1286	{
		1287	req->type = ix;
		1288	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1289	}
		1290	else
		1291	{
		1292	req->type = EIO_FCHMOD;
		1293	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1294	}
		1295
		1296	REQ_SEND;
		1297	}
		1298
		1299	void
		1300	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1301	PPCODE:
		1302	{
		1303	dREQ;
		1304
		1305	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1306	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1307	req->sv1 = newSVsv (fh_or_path);
		1308
		1309	if (SvPOK (req->sv1))
		1310	{
		1311	req->type = EIO_CHOWN;
		1312	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1313	}
		1314	else
		1315	{
		1316	req->type = EIO_FCHOWN;
		1317	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1318	}
		1319
		1320	REQ_SEND;
		1321	}
		1322
		1323	void
		1324	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1325	PPCODE:
		1326	{
		1327	dREQ;
		1328
		1329	req->type = EIO_READDIR;
		1330	req->sv1 = newSVsv (pathname);
		1331	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1332	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1333
		1334	if (flags & EIO_READDIR_DENTS)
		1335	req->int1 |= EIO_READDIR_CUSTOM2;
		1336
		1337	REQ_SEND;
		1338	}
		1339
		1340	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	1341	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	1342	ALIAS:
1230	aio_unlink = REQ_UNLINK	1343	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	1344	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	1345	aio_readdir = EIO_READDIR
1233	PPCODE:	1346	PPCODE:
1234	{	1347	{
1235	dREQ;	1348	dREQ;
1236		1349
1237	req->type = ix;	1350	req->type = ix;
1238	req->data = newSVsv (pathname);	1351	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	1352	req->ptr1 = SvPVbyte_nolen (req->sv1);
1240		1353
1241	REQ_SEND;	1354	REQ_SEND;
1242	}	1355	}
1243		1356
1244	void	1357	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1358	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1246	SV * oldpath
1247	SV * newpath
1248	SV * callback
1249	ALIAS:	1359	ALIAS:
1250	aio_link = REQ_LINK	1360	aio_link = EIO_LINK
1251	aio_symlink = REQ_SYMLINK	1361	aio_symlink = EIO_SYMLINK
1252	aio_rename = REQ_RENAME	1362	aio_rename = EIO_RENAME
1253	PPCODE:	1363	PPCODE:
1254	{	1364	{
1255	dREQ;	1365	dREQ;
1256		1366
1257	req->type = ix;	1367	req->type = ix;
1258	req->fh = newSVsv (oldpath);	1368	req->sv1 = newSVsv (oldpath);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	1369	req->ptr1 = SvPVbyte_nolen (req->sv1);
1260	req->data = newSVsv (newpath);	1370	req->sv2 = newSVsv (newpath);
1261	req->dataptr = SvPVbyte_nolen (req->data);	1371	req->ptr2 = SvPVbyte_nolen (req->sv2);
1262		1372
1263	REQ_SEND;	1373	REQ_SEND;
1264	}	1374	}
1265		1375
1266	void	1376	void
1267	aio_busy (delay,callback=&PL_sv_undef)	1377	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	1378	PPCODE:
1271	{	1379	{
1272	dREQ;	1380	dREQ;
1273		1381
1274	req->type = REQ_BUSY;	1382	req->type = EIO_MKNOD;
1275	req->fd = delay < 0. ? 0 : delay;	1383	req->sv1 = newSVsv (pathname);
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1384	req->ptr1 = SvPVbyte_nolen (req->sv1);
1277		1385	req->int2 = (mode_t)mode;
		1386	req->offs = dev;
		1387
1278	REQ_SEND;	1388	REQ_SEND;
1279	}	1389	}
1280		1390
1281	void	1391	void
1282	aio_group (callback=&PL_sv_undef)	1392	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1283	SV * callback	1393	ALIAS:
1284	PROTOTYPE: ;$	1394	aio_mtouch = EIO_MTOUCH
		1395	aio_msync = EIO_MSYNC
1285	PPCODE:	1396	PPCODE:
1286	{	1397	{
		1398	STRLEN svlen;
		1399	char *svptr = SvPVbyte (data, svlen);
		1400	UV len = SvUV (length);
		1401
		1402	if (offset < 0)
		1403	offset += svlen;
		1404
		1405	if (offset < 0 || offset > svlen)
		1406	croak ("offset outside of scalar");
		1407
		1408	if (!SvOK (length) || len + offset > svlen)
		1409	len = svlen - offset;
		1410
		1411	{
		1412	dREQ;
		1413
		1414	req->type = ix;
		1415	req->sv2 = SvREFCNT_inc (data);
		1416	req->ptr2 = (char *)svptr + offset;
		1417	req->size = len;
		1418	req->int1 = flags;
		1419
		1420	REQ_SEND;
		1421	}
		1422	}
		1423
		1424	void
		1425	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1426	PPCODE:
		1427	{
		1428	STRLEN svlen;
		1429	char *svptr = SvPVbyte (data, svlen);
		1430	UV len = SvUV (length);
		1431
		1432	if (offset < 0)
		1433	offset += svlen;
		1434
		1435	if (offset < 0 || offset > svlen)
		1436	croak ("offset outside of scalar");
		1437
		1438	if (!SvOK (length) || len + offset > svlen)
		1439	len = svlen - offset;
		1440
		1441	{
		1442	dREQ;
		1443
		1444	req->type = EIO_MLOCK;
		1445	req->sv2 = SvREFCNT_inc (data);
		1446	req->ptr2 = (char *)svptr + offset;
		1447	req->size = len;
		1448
		1449	REQ_SEND;
		1450	}
		1451	}
		1452
		1453	void
		1454	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1455	PPCODE:
		1456	{
		1457	dREQ;
		1458
		1459	req->type = EIO_MLOCKALL;
		1460	req->int1 = flags;
		1461
		1462	REQ_SEND;
		1463	}
		1464
		1465	void
		1466	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1467	PPCODE:
		1468	{
1287	dREQ;	1469	dREQ;
1288		1470
		1471	req->type = EIO_BUSY;
		1472	req->nv1 = delay < 0. ? 0. : delay;
		1473
		1474	REQ_SEND;
		1475	}
		1476
		1477	void
		1478	aio_group (SV *callback=&PL_sv_undef)
		1479	PPCODE:
		1480	{
		1481	dREQ;
		1482
1289	req->type = REQ_GROUP;	1483	req->type = EIO_GROUP;
		1484
1290	req_send (req);	1485	req_submit (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1486	XPUSHs (req_sv (req, aio_grp_stash));
1293	}	1487	}
1294		1488
1295	void	1489	void
1296	aio_nop (callback=&PL_sv_undef)	1490	aio_nop (SV *callback=&PL_sv_undef)
1297	SV * callback	1491	ALIAS:
		1492	aio_nop = EIO_NOP
		1493	aio_sync = EIO_SYNC
1298	PPCODE:	1494	PPCODE:
1299	{	1495	{
1300	dREQ;	1496	dREQ;
1301		1497
1302	req->type = REQ_NOP;	1498	req->type = ix;
1303		1499
1304	REQ_SEND;	1500	REQ_SEND;
1305	}	1501	}
1306		1502
1307	void	1503	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1504	aioreq_pri (int pri = 0)
1309	CODE:	1505	CODE:
		1506	RETVAL = next_pri;
		1507	if (items > 0)
		1508	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1509	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1510	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1511	next_pri = pri;
		1512	}
		1513	OUTPUT:
		1514	RETVAL
1313		1515
1314	void	1516	void
1315	aioreq_nice (int nice = 0)	1517	aioreq_nice (int nice = 0)
1316	CODE:	1518	CODE:
1317	nice = next_pri - nice;	1519	nice = next_pri - nice;
1318	if (nice < PRI_MIN) nice = PRI_MIN;	1520	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1319	if (nice > PRI_MAX) nice = PRI_MAX;	1521	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1320	next_pri = nice + PRI_BIAS;	1522	next_pri = nice;
1321		1523
1322	void	1524	void
1323	flush ()	1525	flush ()
1324	PROTOTYPE:
1325	CODE:	1526	CODE:
1326	while (nreqs)	1527	while (eio_nreqs ())
1327	{	1528	{
1328	poll_wait ();	1529	poll_wait ();
1329	poll_cb ();	1530	poll_cb ();
1330	}	1531	}
1331		1532
1332	void
1333	poll()
1334	PROTOTYPE:
1335	CODE:
1336	if (nreqs)
1337	{
1338	poll_wait ();
1339	poll_cb ();
1340	}
1341
1342	int	1533	int
1343	poll_fileno()	1534	poll ()
1344	PROTOTYPE:
1345	CODE:	1535	CODE:
1346	RETVAL = respipe [0];	1536	poll_wait ();
1347	OUTPUT:
1348	RETVAL
1349
1350	int
1351	poll_cb(...)
1352	PROTOTYPE:
1353	CODE:
1354	RETVAL = poll_cb ();	1537	RETVAL = poll_cb ();
1355	OUTPUT:	1538	OUTPUT:
1356	RETVAL	1539	RETVAL
1357		1540
1358	void
1359	poll_wait()
1360	PROTOTYPE:
1361	CODE:
1362	if (nreqs)
1363	poll_wait ();
1364
1365	int	1541	int
1366	nreqs()	1542	poll_fileno ()
1367	PROTOTYPE:
1368	CODE:	1543	CODE:
1369	RETVAL = nreqs;	1544	RETVAL = s_epipe_fd (&respipe);
1370	OUTPUT:	1545	OUTPUT:
1371	RETVAL	1546	RETVAL
1372		1547
		1548	int
		1549	poll_cb (...)
		1550	PROTOTYPE:
		1551	CODE:
		1552	RETVAL = poll_cb ();
		1553	OUTPUT:
		1554	RETVAL
		1555
		1556	void
		1557	poll_wait ()
		1558	CODE:
		1559	poll_wait ();
		1560
		1561	int
		1562	nreqs ()
		1563	CODE:
		1564	RETVAL = eio_nreqs ();
		1565	OUTPUT:
		1566	RETVAL
		1567
		1568	int
		1569	nready ()
		1570	CODE:
		1571	RETVAL = eio_nready ();
		1572	OUTPUT:
		1573	RETVAL
		1574
		1575	int
		1576	npending ()
		1577	CODE:
		1578	RETVAL = eio_npending ();
		1579	OUTPUT:
		1580	RETVAL
		1581
		1582	int
		1583	nthreads ()
		1584	CODE:
		1585	RETVAL = eio_nthreads ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1591	CODE:
		1592	RETVAL = posix_fadvise (fh, offset, length, advice);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	IV
		1597	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1598	CODE:
		1599	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	void
		1604	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1605	PPCODE:
		1606	sv_unmagic (scalar, MMAP_MAGIC);
		1607	{
		1608	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1609	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1610	if (addr == (void *)-1)
		1611	XSRETURN_NO;
		1612
		1613	sv_force_normal (scalar);
		1614
		1615	/* we store the length in mg_obj, as namlen is I32 :/ */
		1616	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1617	->mg_obj = (SV *)length;
		1618
		1619	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1620
		1621	if (!(prot & PROT_WRITE))
		1622	SvREADONLY_on (scalar);
		1623
		1624	if (SvLEN (scalar))
		1625	Safefree (SvPVX (scalar));
		1626
		1627	SvPVX (scalar) = (char *)addr;
		1628	SvCUR_set (scalar, length);
		1629	SvLEN_set (scalar, 0);
		1630	SvPOK_only (scalar);
		1631
		1632	XSRETURN_YES;
		1633	}
		1634
		1635	void
		1636	munmap (SV *scalar)
		1637	CODE:
		1638	sv_unmagic (scalar, MMAP_MAGIC);
		1639
		1640	int
		1641	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1642	ALIAS:
		1643	mprotect = 1
		1644	CODE:
		1645	{
		1646	STRLEN svlen;
		1647	void *addr = SvPVbyte (scalar, svlen);
		1648	size_t len = SvUV (length);
		1649
		1650	if (offset < 0)
		1651	offset += svlen;
		1652
		1653	if (offset < 0 || offset > svlen)
		1654	croak ("offset outside of scalar");
		1655
		1656	if (!SvOK (length) || len + offset > svlen)
		1657	len = svlen - offset;
		1658
		1659	addr = (void *)(((intptr_t)addr) + offset);
		1660	eio_page_align (&addr, &len);
		1661
		1662	switch (ix)
		1663	{
		1664	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1665	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1666	}
		1667	}
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	int
		1672	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1673	CODE:
		1674	{
		1675	STRLEN svlen;
		1676	void *addr = SvPVbyte (scalar, svlen);
		1677	size_t len = SvUV (length);
		1678
		1679	if (offset < 0)
		1680	offset += svlen;
		1681
		1682	if (offset < 0 || offset > svlen)
		1683	croak ("offset outside of scalar");
		1684
		1685	if (!SvOK (length) || len + offset > svlen)
		1686	len = svlen - offset;
		1687
		1688	addr = (void *)(((intptr_t)addr) + offset);
		1689	eio_page_align (&addr, &len);
		1690	#if _POSIX_MEMLOCK_RANGE
		1691	RETVAL = munlock (addr, len);
		1692	#else
		1693	RETVAL = ((errno = ENOSYS), -1);
		1694	#endif
		1695	}
		1696	OUTPUT:
		1697	RETVAL
		1698
		1699	int
		1700	munlockall ()
		1701	CODE:
		1702	#if _POSIX_MEMLOCK
		1703	munlockall ();
		1704	#else
		1705	RETVAL = -1;
		1706	errno = ENOSYS;
		1707	#endif
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	void _on_next_submit (SV *cb)
		1712	CODE:
		1713	SvREFCNT_dec (on_next_submit);
		1714	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1715
1373	PROTOTYPES: DISABLE	1716	PROTOTYPES: DISABLE
1374		1717
1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1718	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1376		1719
1377	void	1720	void
1378	cancel (aio_req_ornot req)	1721	cancel (aio_req_ornot req)
1379	CODE:	1722	CODE:
1380	req_cancel (req);	1723	eio_cancel (req);
1381		1724
1382	void	1725	void
1383	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1726	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1384	CODE:	1727	PPCODE:
		1728	{
		1729	if (GIMME_V != G_VOID)
		1730	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1731
		1732	if (items > 1)
		1733	{
		1734	SV *cb_cv =get_cb (callback);
		1735
1385	SvREFCNT_dec (req->callback);	1736	SvREFCNT_dec (req->callback);
1386	req->callback = newSVsv (callback);	1737	req->callback = SvREFCNT_inc (cb_cv);
		1738	}
		1739	}
1387		1740
1388	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1741	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1389		1742
1390	void	1743	void
1391	add (aio_req grp, ...)	1744	add (aio_req grp, ...)
1392	PPCODE:	1745	PPCODE:
1393	{	1746	{
1394	int i;	1747	int i;
1395	aio_req req;
1396		1748
1397	if (grp->fd == 2)	1749	if (grp->int1 == 2)
1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1750	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1399		1751
1400	for (i = 1; i < items; ++i )	1752	for (i = 1; i < items; ++i )
1401	{	1753	{
		1754	aio_req req;
		1755
1402	if (GIMME_V != G_VOID)	1756	if (GIMME_V != G_VOID)
1403	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1757	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1404		1758
1405	req = SvAIO_REQ (ST (i));	1759	req = SvAIO_REQ (ST (i));
1406		1760
1407	if (req)	1761	if (req)
1408	{	1762	eio_grp_add (grp, req);
1409	++grp->length;
1410	req->grp = grp;
1411
1412	req->grp_prev = 0;
1413	req->grp_next = grp->grp_first;
1414
1415	if (grp->grp_first)
1416	grp->grp_first->grp_prev = req;
1417
1418	grp->grp_first = req;
1419	}
1420	}	1763	}
1421	}	1764	}
		1765
		1766	void
		1767	cancel_subs (aio_req_ornot req)
		1768	CODE:
		1769	req_cancel_subs (req);
1422		1770
1423	void	1771	void
1424	result (aio_req grp, ...)	1772	result (aio_req grp, ...)
1425	CODE:	1773	CODE:
1426	{	1774	{
1427	int i;	1775	int i;
		1776	AV *av;
		1777
		1778	grp->errorno = errno;
		1779
1428	AV *av = newAV ();	1780	av = newAV ();
		1781	av_extend (av, items - 1);
1429		1782
1430	for (i = 1; i < items; ++i )	1783	for (i = 1; i < items; ++i )
1431	av_push (av, newSVsv (ST (i)));	1784	av_push (av, newSVsv (ST (i)));
1432		1785
1433	SvREFCNT_dec (grp->data);	1786	SvREFCNT_dec (grp->sv1);
1434	grp->data = (SV *)av;	1787	grp->sv1 = (SV *)av;
1435	}	1788	}
		1789
		1790	void
		1791	errno (aio_req grp, int errorno = errno)
		1792	CODE:
		1793	grp->errorno = errorno;
1436		1794
1437	void	1795	void
1438	limit (aio_req grp, int limit)	1796	limit (aio_req grp, int limit)
1439	CODE:	1797	CODE:
1440	grp->fd2 = limit;	1798	eio_grp_limit (grp, limit);
1441	aio_grp_feed (grp);
1442		1799
1443	void	1800	void
1444	feed (aio_req grp, SV *callback=&PL_sv_undef)	1801	feed (aio_req grp, SV *callback=&PL_sv_undef)
1445	CODE:	1802	CODE:
1446	{	1803	{
1447	SvREFCNT_dec (grp->fh2);	1804	SvREFCNT_dec (grp->sv2);
1448	grp->fh2 = newSVsv (callback);	1805	grp->sv2 = newSVsv (callback);
		1806	grp->feed = aio_grp_feed;
1449		1807
1450	if (grp->fd2 <= 0)	1808	if (grp->int2 <= 0)
1451	grp->fd2 = 2;	1809	grp->int2 = 2;
1452		1810
1453	aio_grp_feed (grp);	1811	eio_grp_limit (grp, grp->int2);
1454	}	1812	}
1455		1813

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