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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 1.185 by root, Thu Jul 7 22:36:18 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>
		16	#include <sys/statvfs.h>
23	#include <limits.h>	17	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	18	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	19	#include <sched.h>
28		20
29	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
30	# if __linux
31	# include <sys/sendfile.h>	22	# include <sys/mman.h>
32	# elif __freebsd	23	#endif
33	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
34	# include <sys/uio.h>	68	# include <sys/time.h>
35	# elif __hpux
36	# include <sys/socket.h>
37	# elif __solaris /* not yet */
38	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	/* Linux/others */
		127	#ifndef O_ASYNC
		128	# define O_ASYNC 0
		129	#endif
		130	#ifndef O_DIRECT
		131	# define O_DIRECT 0
		132	#endif
		133	#ifndef O_NOATIME
		134	# define O_NOATIME 0
		135	#endif
		136
		137	/* POSIX */
		138	#ifndef O_CLOEXEC
		139	# define O_CLOEXEC 0
		140	#endif
		141	#ifndef O_NOFOLLOW
		142	# define O_NOFOLLOW 0
		143	#endif
		144	#ifndef O_NOCTTY
		145	# define O_NOCTTY 0
		146	#endif
		147	#ifndef O_NONBLOCK
		148	# define O_NONBLOCK 0
		149	#endif
		150	#ifndef O_EXEC
		151	# define O_EXEC 0
		152	#endif
		153	#ifndef O_SEARCH
		154	# define O_SEARCH 0
		155	#endif
		156	#ifndef O_DIRECTORY
		157	# define O_DIRECTORY 0
		158	#endif
		159	#ifndef O_DSYNC
		160	# define O_DSYNC 0
		161	#endif
		162	#ifndef O_RSYNC
		163	# define O_RSYNC 0
		164	#endif
		165	#ifndef O_SYNC
		166	# define O_SYNC 0
		167	#endif
		168	#ifndef O_TTY_INIT
		169	# define O_TTY_INIT 0
		170	#endif
		171
		172	#ifndef POSIX_FADV_NORMAL
		173	# define POSIX_FADV_NORMAL 0
		174	#endif
		175	#ifndef POSIX_FADV_SEQUENTIAL
		176	# define POSIX_FADV_SEQUENTIAL 0
		177	#endif
		178	#ifndef POSIX_FADV_RANDOM
		179	# define POSIX_FADV_RANDOM 0
		180	#endif
		181	#ifndef POSIX_FADV_NOREUSE
		182	# define POSIX_FADV_NOREUSE 0
		183	#endif
		184	#ifndef POSIX_FADV_WILLNEED
		185	# define POSIX_FADV_WILLNEED 0
		186	#endif
		187	#ifndef POSIX_FADV_DONTNEED
		188	# define POSIX_FADV_DONTNEED 0
		189	#endif
		190
		191	#if !HAVE_POSIX_FADVISE
		192	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		193	#endif
		194
		195	#ifndef POSIX_MADV_NORMAL
		196	# define POSIX_MADV_NORMAL 0
		197	#endif
		198	#ifndef POSIX_MADV_SEQUENTIAL
		199	# define POSIX_MADV_SEQUENTIAL 0
		200	#endif
		201	#ifndef POSIX_MADV_RANDOM
		202	# define POSIX_MADV_RANDOM 0
		203	#endif
		204	#ifndef POSIX_MADV_WILLNEED
		205	# define POSIX_MADV_WILLNEED 0
		206	#endif
		207	#ifndef POSIX_MADV_DONTNEED
		208	# define POSIX_MADV_DONTNEED 0
		209	#endif
		210
		211	#if !HAVE_POSIX_MADVISE
		212	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		213	#endif
		214
		215	#ifndef PROT_NONE
		216	# define PROT_NONE 0
		217	#endif
		218	#ifndef PROT_READ
		219	# define PROT_READ 0
		220	#endif
		221	#ifndef PROT_WRITE
		222	# define PROT_READ 0
		223	#endif
		224	#ifndef PROT_EXEC
		225	# define PROT_EXEC 0
		226	#endif
		227
		228	#ifndef ST_NODEV
		229	# define ST_NODEV 0
		230	#endif
		231	#ifndef ST_NOEXEC
		232	# define ST_NOEXEC 0
		233	#endif
		234	#ifndef ST_SYNCHRONOUS
		235	# define ST_SYNCHRONOUS 0
		236	#endif
		237	#ifndef ST_MANDLOCK
		238	# define ST_MANDLOCK 0
		239	#endif
		240	#ifndef ST_WRITE
		241	# define ST_WRITE 0
		242	#endif
		243	#ifndef ST_APPEND
		244	# define ST_APPEND 0
		245	#endif
		246	#ifndef ST_IMMUTABLE
		247	# define ST_IMMUTABLE 0
		248	#endif
		249	#ifndef ST_NOATIME
		250	# define ST_NOATIME 0
		251	#endif
		252	#ifndef ST_NODIRATIME
		253	# define ST_NODIRATIME 0
		254	#endif
		255	#ifndef ST_RELATIME
		256	# define ST_RELATIME 0
		257	#endif
		258
		259	#ifndef S_IFIFO
		260	# define S_IFIFO 0
		261	#endif
		262	#ifndef S_IFCHR
		263	# define S_IFCHR 0
		264	#endif
		265	#ifndef S_IFBLK
		266	# define S_IFBLK 0
		267	#endif
		268	#ifndef S_IFLNK
		269	# define S_IFLNK 0
		270	#endif
		271	#ifndef S_IFREG
		272	# define S_IFREG 0
		273	#endif
		274	#ifndef S_IFDIR
		275	# define S_IFDIR 0
		276	#endif
		277	#ifndef S_IFWHT
		278	# define S_IFWHT 0
		279	#endif
		280	#ifndef S_IFSOCK
		281	# define S_IFSOCK 0
		282	#endif
		283
		284	#ifndef MAP_ANONYMOUS
		285	# ifdef MAP_ANON
		286	# define MAP_ANONYMOUS MAP_ANON
39	# else	287	# else
40	# error sendfile support requested but not available	288	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
41	# endif	289	# endif
42	#endif	290	#endif
43		291	#ifndef MAP_HUGETLB
44	/* used for struct dirent, AIX doesn't provide it */	292	# define MAP_HUGETLB 0
45	#ifndef NAME_MAX
46	# define NAME_MAX 4096
47	#endif	293	#endif
48		294	#ifndef MAP_LOCKED
49	#if __ia64	295	# 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	296	#endif
		297	#ifndef MAP_NORESERVE
		298	# define MAP_NORESERVE 0
		299	#endif
		300	#ifndef MAP_POPULATE
		301	# define MAP_POPULATE 0
		302	#endif
		303	#ifndef MAP_NONBLOCK
		304	# define MAP_NONBLOCK 0
		305	#endif
56		306
57	/* buffer size for various temporary buffers */	307	#ifndef makedev
58	#define AIO_BUFSIZE 65536	308	# define makedev(maj,min) (((maj) << 8) | (min))
		309	#endif
		310	#ifndef major
		311	# define major(dev) ((dev) >> 8)
		312	#endif
		313	#ifndef minor
		314	# define minor(dev) ((dev) & 0xff)
		315	#endif
59		316
60	#define dBUF \	317	#ifndef PAGESIZE
61	char *aio_buf = malloc (AIO_BUFSIZE); \	318	# define PAGESIZE sysconf (_SC_PAGESIZE)
62	if (!aio_buf) \	319	#endif
63	return -1;
64		320
65	#define fBUF free (aio_buf)	321	static int req_invoke (eio_req *req);
		322	#define EIO_FINISH(req) req_invoke (req)
		323	static void req_destroy (eio_req *grp);
		324	#define EIO_DESTROY(req) req_destroy (req)
66		325
67	enum {	326	enum {
68	REQ_QUIT,	327	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	};	328	};
80		329
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	330	#include "libeio/eio.c"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		331
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	if (req->result >= 0)
		547	{
		548	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		549	HV *hv = newHV ();
		550
		551	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		552
		553	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		554	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		555	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		556	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		557	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		558	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		559	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		560	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		561	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		562	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		563	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		564	}
		565
		566	PUSHs (rv);
		567	}
		568
		569	break;
		570
351	case REQ_GROUP:	571	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	572	req->int1 = 2; /* mark group as finished */
353		573
354	if (req->data)	574	if (req->sv1)
355	{	575	{
356	int i;	576	int i;
357	AV *av = (AV *)req->data;	577	AV *av = (AV *)req->sv1;
358		578
359	EXTEND (SP, AvFILL (av) + 1);	579	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	580	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	581	PUSHs (*av_fetch (av, i, 0));
362	}	582	}
363	break;	583	break;
364		584
365	case REQ_NOP:	585	case EIO_NOP:
366	case REQ_BUSY:	586	case EIO_BUSY:
367	break;	587	break;
368		588
		589	case EIO_READLINK:
		590	case EIO_REALPATH:
		591	if (req->result > 0)
		592	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		593	break;
		594
		595	case EIO_STAT:
		596	case EIO_LSTAT:
		597	case EIO_FSTAT:
		598	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		599	PL_laststatval = req->result;
		600	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		601	PUSHs (sv_result);
		602	break;
		603
		604	case EIO_READ:
		605	{
		606	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		607	*SvEND (req->sv2) = 0;
		608	SvPOK_only (req->sv2);
		609	SvSETMAGIC (req->sv2);
		610	PUSHs (sv_result);
		611	}
		612	break;
		613
		614	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		615	if (req->result > 0)
		616	SvIV_set (sv_result, 0);
		617	/* FALLTHROUGH */
		618
369	default:	619	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	620	PUSHs (sv_result);
371	break;	621	break;
372	}	622	}
373		623
		624	errno = req->errorno;
374		625
375	PUTBACK;	626	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	627	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	628	SPAGAIN;
		629
		630	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		631	SvREFCNT_dec (sv_result);
		632	else
		633	sv_result_cache = sv_result;
378		634
379	FREETMPS;	635	FREETMPS;
380	LEAVE;	636	LEAVE;
		637
		638	PUTBACK;
381	}	639	}
382		640
383	if (req->grp)	641	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	}	642	}
403		643
404	static void req_free (aio_req req)	644	static void req_destroy (aio_req req)
405	{	645	{
406	if (req->self)	646	if (req->self)
407	{	647	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	648	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	649	SvREFCNT_dec (req->self);
410	}	650	}
411		651
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	652	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	653	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	654	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420		655
421	Safefree (req);	656	Safefree (req);
422	}	657	}
423		658
424	static void req_cancel (aio_req req)	659	static void req_cancel_subs (aio_req grp)
425	{	660	{
426	req->flags |= FLAG_CANCELLED;	661	aio_req sub;
427		662
428	if (req->type == REQ_GROUP)	663	if (grp->type != EIO_GROUP)
		664	return;
		665
		666	SvREFCNT_dec (grp->sv2);
		667	grp->sv2 = 0;
		668
		669	eio_grp_cancel (grp);
		670	}
		671
		672	static void create_respipe (void)
		673	{
		674	if (s_epipe_renew (&respipe))
		675	croak ("IO::AIO: unable to initialize result pipe");
		676	}
		677
		678	static void poll_wait (void)
		679	{
		680	while (eio_nreqs ())
429	{	681	{
430	aio_req sub;	682	int size;
431		683
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	684	X_LOCK (reslock);
433	req_cancel (sub);	685	size = res_queue.size;
		686	X_UNLOCK (reslock);
		687
		688	if (size)
		689	return;
		690
		691	etp_maybe_start_thread ();
		692
		693	s_epipe_wait (&respipe);
434	}	694	}
435	}	695	}
436		696
437	static int poll_cb ()	697	static int poll_cb (void)
438	{	698	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	699	for (;;)
445	{	700	{
446	pthread_mutex_lock (&reslock);	701	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		702
449	if (req)	703	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;	704	croak (0);
464		705
465	--nreqs;	706	if (!max_outstanding || max_outstanding > eio_nreqs ())
		707	return res;
466		708
467	if (req->type == REQ_QUIT)	709	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	}	710	}
496
497	return count;
498	}	711	}
499		712
500	static void *aio_proc(void *arg);
501
502	static void start_thread (void)	713	static void atfork_child (void)
503	{	714	{
504	sigset_t fullsigset, oldsigset;	715	create_respipe ();
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
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	}	716	}
594		717
595	/*****************************************************************************/	718	/*****************************************************************************/
596	/* work around various missing functions */
597		719
598	#if !HAVE_PREADWRITE	720	#if !_POSIX_MAPPED_FILES
599	# define pread aio_pread	721	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
600	# define pwrite aio_pwrite	722	# 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	723	#endif
742	#else
743	res = -1;
744	errno = ENOSYS;
745	#endif
746		724
747	if (res < 0	725	#if !_POSIX_MEMORY_PROTECTION
748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	726	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
749	#if __solaris	727	# define PROT_NONE 0
750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	728	# define PROT_WRITE 0
		729	# define MAP_PRIVATE 0
		730	# define MAP_SHARED 0
		731	# define MAP_FIXED 0
751	#endif	732	#endif
752	)
753	)
754	{
755	/* emulate sendfile. this is a major pain in the ass */
756	dBUF;
757		733
758	res = 0;	734	#define MMAP_MAGIC PERL_MAGIC_ext
759		735
760	while (count)	736	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	{	737	{
794	DIR *dirp;	738	int old_errno = errno;
795	union	739	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;	740	errno = old_errno;
845	free (u);
846	closedir (dirp);
847		741
848	if (errorno)	742	mg->mg_obj = 0; /* just in case */
849	{
850	free (names);
851	errno = errorno;
852	res = -1;
853	}
854		743
855	*namesp = (void *)names;	744	SvREADONLY_off (sv);
		745
		746	if (SvPVX (sv) != mg->mg_ptr)
		747	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		748
		749	SvCUR_set (sv, 0);
		750	SvPVX (sv) = 0;
		751	SvOK_off (sv);
		752
856	return res;	753	return 0;
857	}	754	}
		755
		756	static MGVTBL mmap_vtbl = {
		757	0, 0, 0, 0, mmap_free
		758	};
858		759
859	/*****************************************************************************/	760	/*****************************************************************************/
860		761
861	static void *aio_proc (void *thr_arg)	762	static SV * get_cb (SV *cb_sv)
862	{	763	{
863	aio_req req;	764	SvGETMAGIC (cb_sv);
864	int type;	765	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	}	766	}
989		767
990	#define dREQ \	768	#define dREQ \
		769	SV *cb_cv; \
991	aio_req req; \	770	aio_req req; \
992	int req_pri = next_pri; \	771	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \	772	next_pri = EIO_PRI_DEFAULT; \
994	\	773	\
995	if (SvOK (callback) && !SvROK (callback)) \	774	cb_cv = get_cb (callback); \
996	croak ("callback must be undef or of reference type"); \
997	\	775	\
998	Newz (0, req, 1, aio_cb); \	776	Newz (0, req, 1, eio_req); \
999	if (!req) \	777	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \	778	croak ("out of memory during eio_req allocation"); \
1001	\	779	\
1002	req->callback = newSVsv (callback); \	780	req->callback = SvREFCNT_inc (cb_cv); \
1003	req->pri = req_pri	781	req->pri = req_pri
1004		782
1005	#define REQ_SEND \	783	#define REQ_SEND \
		784	PUTBACK; \
1006	req_send (req); \	785	req_submit (req); \
		786	SPAGAIN; \
1007	\	787	\
1008	if (GIMME_V != G_VOID) \	788	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));	789	XPUSHs (req_sv (req, aio_req_stash));
1010		790
1011	MODULE = IO::AIO PACKAGE = IO::AIO	791	MODULE = IO::AIO PACKAGE = IO::AIO
1012		792
1013	PROTOTYPES: ENABLE	793	PROTOTYPES: ENABLE
1014		794
1015	BOOT:	795	BOOT:
1016	{	796	{
		797	static const struct {
		798	const char *name;
		799	IV iv;
		800	} *civ, const_iv[] = {
		801	# define const_niv(name, value) { # name, (IV) value },
		802	# define const_iv(name) { # name, (IV) name },
		803	# define const_eio(name) { # name, (IV) EIO_ ## name },
		804	const_iv (EXDEV)
		805	const_iv (ENOSYS)
		806	const_iv (O_RDONLY)
		807	const_iv (O_WRONLY)
		808	const_iv (O_RDWR)
		809	const_iv (O_CREAT)
		810	const_iv (O_TRUNC)
		811	const_iv (O_EXCL)
		812	const_iv (O_APPEND)
		813
		814	const_iv (O_ASYNC)
		815	const_iv (O_DIRECT)
		816	const_iv (O_NOATIME)
		817
		818	const_iv (O_CLOEXEC)
		819	const_iv (O_NOCTTY)
		820	const_iv (O_NOFOLLOW)
		821	const_iv (O_NONBLOCK)
		822	const_iv (O_EXEC)
		823	const_iv (O_SEARCH)
		824	const_iv (O_DIRECTORY)
		825	const_iv (O_DSYNC)
		826	const_iv (O_RSYNC)
		827	const_iv (O_SYNC)
		828	const_iv (O_TTY_INIT)
		829
		830	const_iv (S_IFIFO)
		831	const_iv (S_IFCHR)
		832	const_iv (S_IFBLK)
		833	const_iv (S_IFLNK)
		834	const_iv (S_IFREG)
		835	const_iv (S_IFDIR)
		836	const_iv (S_IFWHT)
		837	const_iv (S_IFSOCK)
		838	const_iv (S_IFMT)
		839
		840	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		841	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		842	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		843	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		844	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		845	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		846
		847	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		848	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		849	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		850	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		851	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		852
		853	const_iv (ST_RDONLY)
		854	const_iv (ST_NOSUID)
		855	const_iv (ST_NODEV)
		856	const_iv (ST_NOEXEC)
		857	const_iv (ST_SYNCHRONOUS)
		858	const_iv (ST_MANDLOCK)
		859	const_iv (ST_WRITE)
		860	const_iv (ST_APPEND)
		861	const_iv (ST_IMMUTABLE)
		862	const_iv (ST_NOATIME)
		863	const_iv (ST_NODIRATIME)
		864	const_iv (ST_RELATIME)
		865
		866	const_iv (PROT_NONE)
		867	const_iv (PROT_EXEC)
		868	const_iv (PROT_READ)
		869	const_iv (PROT_WRITE)
		870
		871	/*const_iv (MAP_FIXED)*/
		872	const_iv (MAP_PRIVATE)
		873	const_iv (MAP_SHARED)
		874	const_iv (MAP_ANONYMOUS)
		875
		876	/* linuxish */
		877	const_iv (MAP_HUGETLB)
		878	const_iv (MAP_LOCKED)
		879	const_iv (MAP_NORESERVE)
		880	const_iv (MAP_POPULATE)
		881	const_iv (MAP_NONBLOCK)
		882
		883	const_eio (MCL_FUTURE)
		884	const_eio (MCL_CURRENT)
		885
		886	const_eio (MS_ASYNC)
		887	const_eio (MS_INVALIDATE)
		888	const_eio (MS_SYNC)
		889
		890	const_eio (MT_MODIFY)
		891
		892	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		893	const_eio (SYNC_FILE_RANGE_WRITE)
		894	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		895
		896	const_eio (FALLOC_FL_KEEP_SIZE)
		897
		898	const_eio (READDIR_DENTS)
		899	const_eio (READDIR_DIRS_FIRST)
		900	const_eio (READDIR_STAT_ORDER)
		901	const_eio (READDIR_FOUND_UNKNOWN)
		902
		903	const_eio (DT_UNKNOWN)
		904	const_eio (DT_FIFO)
		905	const_eio (DT_CHR)
		906	const_eio (DT_DIR)
		907	const_eio (DT_BLK)
		908	const_eio (DT_REG)
		909	const_eio (DT_LNK)
		910	const_eio (DT_SOCK)
		911	const_eio (DT_WHT)
		912	};
		913
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	914	aio_stash = gv_stashpv ("IO::AIO" , 1);
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	915	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	916	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1021		917
		918	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		919	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		920
		921	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		922
1022	create_pipe ();	923	create_respipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025		924
		925	if (eio_init (want_poll, done_poll) < 0)
		926	croak ("IO::AIO: unable to initialise eio library");
		927
		928	/* atfork child called in fifo order, so before eio's handler */
		929	X_THREAD_ATFORK (0, 0, atfork_child);
		930	}
		931
1026	void	932	void
1027	min_parallel (nthreads)	933	max_poll_reqs (unsigned int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	934	PROTOTYPE: $
		935	CODE:
		936	eio_set_max_poll_reqs (nreqs);
1030		937
1031	void	938	void
1032	max_parallel (nthreads)	939	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	940	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	941	CODE:
1041	RETVAL = max_outstanding;	942	eio_set_max_poll_time (nseconds);
		943
		944	void
		945	min_parallel (unsigned int nthreads)
		946	PROTOTYPE: $
		947	CODE:
		948	eio_set_min_parallel (nthreads);
		949
		950	void
		951	max_parallel (unsigned int nthreads)
		952	PROTOTYPE: $
		953	CODE:
		954	eio_set_max_parallel (nthreads);
		955
		956	void
		957	max_idle (unsigned int nthreads)
		958	PROTOTYPE: $
		959	CODE:
		960	eio_set_max_idle (nthreads);
		961
		962	void
		963	idle_timeout (unsigned int seconds)
		964	PROTOTYPE: $
		965	CODE:
		966	eio_set_idle_timeout (seconds);
		967
		968	void
		969	max_outstanding (unsigned int maxreqs)
		970	PROTOTYPE: $
		971	CODE:
1042	max_outstanding = nreqs;	972	max_outstanding = maxreqs;
1043		973
1044	void	974	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	975	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:	976	PPCODE:
1052	{	977	{
1053	dREQ;	978	dREQ;
1054		979
1055	req->type = REQ_OPEN;	980	req->type = EIO_OPEN;
1056	req->data = newSVsv (pathname);	981	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	982	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	983	req->int1 = flags;
1059	req->mode = mode;	984	req->int2 = mode;
1060		985
1061	REQ_SEND;	986	REQ_SEND;
1062	}	987	}
1063		988
1064	void	989	void
1065	aio_close (fh,callback=&PL_sv_undef)	990	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$
1069	ALIAS:	991	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC	992	aio_fsync = EIO_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = EIO_FDATASYNC
1073	PPCODE:	994	PPCODE:
1074	{	995	{
		996	int fd = s_fileno_croak (fh, 0);
1075	dREQ;	997	dREQ;
1076		998
1077	req->type = ix;	999	req->type = ix;
1078	req->fh = newSVsv (fh);	1000	req->sv1 = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1001	req->int1 = fd;
1080		1002
1081	REQ_SEND (req);	1003	REQ_SEND (req);
1082	}	1004	}
1083		1005
1084	void	1006	void
		1007	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1008	PPCODE:
		1009	{
		1010	int fd = s_fileno_croak (fh, 0);
		1011	dREQ;
		1012
		1013	req->type = EIO_SYNC_FILE_RANGE;
		1014	req->sv1 = newSVsv (fh);
		1015	req->int1 = fd;
		1016	req->offs = offset;
		1017	req->size = nbytes;
		1018	req->int2 = flags;
		1019
		1020	REQ_SEND (req);
		1021	}
		1022
		1023	void
		1024	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1025	PPCODE:
		1026	{
		1027	int fd = s_fileno_croak (fh, 0);
		1028	dREQ;
		1029
		1030	req->type = EIO_FALLOCATE;
		1031	req->sv1 = newSVsv (fh);
		1032	req->int1 = fd;
		1033	req->int2 = mode;
		1034	req->offs = offset;
		1035	req->size = len;
		1036
		1037	REQ_SEND (req);
		1038	}
		1039
		1040	void
		1041	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1042	PPCODE:
		1043	{
		1044	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		1045	int fd = s_fileno_croak (fh, 0);
		1046	dREQ;
		1047
		1048	if (close_pipe < 0)
		1049	{
		1050	int pipefd [2];
		1051
		1052	if (pipe (pipefd) < 0
		1053	|| close (pipefd [1]) < 0
		1054	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1055	abort (); /*D*/
		1056
		1057	close_pipe = pipefd [0];
		1058	}
		1059
		1060	req->type = EIO_DUP2;
		1061	req->int1 = close_pipe;
		1062	req->sv2 = newSVsv (fh);
		1063	req->int2 = fd;
		1064
		1065	REQ_SEND (req);
		1066	}
		1067
		1068	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1069	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:	1070	ALIAS:
1093	aio_read = REQ_READ	1071	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	1072	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:	1073	PPCODE:
1097	{	1074	{
1098	aio_req req;
1099	STRLEN svlen;	1075	STRLEN svlen;
		1076	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1100	char *svptr = SvPVbyte (data, svlen);	1077	char *svptr = SvPVbyte (data, svlen);
1101		1078	UV len = SvUV (length);
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104		1079
1105	if (dataoffset < 0)	1080	if (dataoffset < 0)
1106	dataoffset += svlen;	1081	dataoffset += svlen;
1107		1082
1108	if (dataoffset < 0 || dataoffset > svlen)	1083	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	1084	croak ("dataoffset outside of data scalar");
1110		1085
1111	if (ix == REQ_WRITE)	1086	if (ix == EIO_WRITE)
1112	{	1087	{
1113	/* write: check length and adjust. */	1088	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	1089	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	1090	len = svlen - dataoffset;
1116	}	1091	}
1117	else	1092	else
1118	{	1093	{
1119	/* read: grow scalar as necessary */	1094	/* read: check type and grow scalar as necessary */
		1095	SvUPGRADE (data, SVt_PV);
1120	svptr = SvGROW (data, length + dataoffset);	1096	svptr = SvGROW (data, len + dataoffset + 1);
1121	}	1097	}
1122
1123	if (length < 0)
1124	croak ("length must not be negative");
1125		1098
1126	{	1099	{
1127	dREQ;	1100	dREQ;
1128		1101
1129	req->type = ix;	1102	req->type = ix;
1130	req->fh = newSVsv (fh);	1103	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1104	req->int1 = fd;
1132	: IoOFP (sv_2io (fh)));	1105	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	1106	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	1107	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	1108	req->ptr2 = (char *)svptr + dataoffset;
		1109	req->stroffset = dataoffset;
1137		1110
1138	if (!SvREADONLY (data))	1111	if (!SvREADONLY (data))
1139	{	1112	{
1140	SvREADONLY_on (data);	1113	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	1114	req->flags |= FLAG_SV2_RO_OFF;
1142	}	1115	}
1143		1116
1144	REQ_SEND;	1117	REQ_SEND;
1145	}	1118	}
1146	}	1119	}
1147		1120
1148	void	1121	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1122	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1150	SV * out_fh	1123	ALIAS:
1151	SV * in_fh	1124	aio_readlink = EIO_READLINK
1152	UV in_offset	1125	aio_realpath = EIO_REALPATH
1153	UV length
1154	SV * callback
1155	PROTOTYPE: $$$$;$
1156	PPCODE:	1126	PPCODE:
1157	{	1127	{
		1128	SV *data;
		1129	dREQ;
		1130
		1131	req->type = ix;
		1132	req->sv1 = newSVsv (path);
		1133	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1134
		1135	REQ_SEND;
		1136	}
		1137
		1138	void
		1139	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1140	PPCODE:
		1141	{
		1142	int ifd = s_fileno_croak (in_fh , 0);
		1143	int ofd = s_fileno_croak (out_fh, 1);
1158	dREQ;	1144	dREQ;
1159		1145
1160	req->type = REQ_SENDFILE;	1146	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	1147	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1148	req->int1 = ofd;
1163	req->fh2 = newSVsv (in_fh);	1149	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1150	req->int2 = ifd;
1165	req->offset = in_offset;	1151	req->offs = in_offset;
1166	req->length = length;	1152	req->size = length;
1167		1153
1168	REQ_SEND;	1154	REQ_SEND;
1169	}	1155	}
1170		1156
1171	void	1157	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1158	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$
1178	PPCODE:	1159	PPCODE:
1179	{	1160	{
		1161	int fd = s_fileno_croak (fh, 0);
1180	dREQ;	1162	dREQ;
1181		1163
1182	req->type = REQ_READAHEAD;	1164	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	1165	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1166	req->int1 = fd;
1185	req->offset = offset;	1167	req->offs = offset;
1186	req->length = length;	1168	req->size = length;
1187		1169
1188	REQ_SEND;	1170	REQ_SEND;
1189	}	1171	}
1190		1172
1191	void	1173	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	1174	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	1175	ALIAS:
1196	aio_stat = REQ_STAT	1176	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	1177	aio_lstat = EIO_LSTAT
		1178	aio_statvfs = EIO_STATVFS
1198	PPCODE:	1179	PPCODE:
1199	{	1180	{
1200	dREQ;	1181	dREQ;
1201		1182
1202	New (0, req->statdata, 1, Stat_t);	1183	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		1184
1209	if (SvPOK (fh_or_path))	1185	if (SvPOK (req->sv1))
1210	{	1186	{
1211	req->type = ix;	1187	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	1188	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	1189	}
1215	else	1190	else
1216	{	1191	{
1217	req->type = REQ_FSTAT;	1192	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)));	1193	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	1194	}
1221		1195
1222	REQ_SEND;	1196	REQ_SEND;
1223	}	1197	}
1224		1198
		1199	UV
		1200	major (UV dev)
		1201	ALIAS:
		1202	minor = 1
		1203	CODE:
		1204	RETVAL = ix ? major (dev) : minor (dev);
		1205	OUTPUT:
		1206	RETVAL
		1207
		1208	UV
		1209	makedev (UV maj, UV min)
		1210	CODE:
		1211	RETVAL = makedev (maj, min);
		1212	OUTPUT:
		1213	RETVAL
		1214
1225	void	1215	void
		1216	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1217	PPCODE:
		1218	{
		1219	dREQ;
		1220
		1221	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1222	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1223	req->sv1 = newSVsv (fh_or_path);
		1224
		1225	if (SvPOK (req->sv1))
		1226	{
		1227	req->type = EIO_UTIME;
		1228	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1229	}
		1230	else
		1231	{
		1232	req->type = EIO_FUTIME;
		1233	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1234	}
		1235
		1236	REQ_SEND;
		1237	}
		1238
		1239	void
		1240	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1241	PPCODE:
		1242	{
		1243	dREQ;
		1244
		1245	req->sv1 = newSVsv (fh_or_path);
		1246	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1247
		1248	if (SvPOK (req->sv1))
		1249	{
		1250	req->type = EIO_TRUNCATE;
		1251	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1252	}
		1253	else
		1254	{
		1255	req->type = EIO_FTRUNCATE;
		1256	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1257	}
		1258
		1259	REQ_SEND;
		1260	}
		1261
		1262	void
		1263	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1264	ALIAS:
		1265	aio_chmod = EIO_CHMOD
		1266	aio_mkdir = EIO_MKDIR
		1267	PPCODE:
		1268	{
		1269	dREQ;
		1270
		1271	req->int2 = mode;
		1272	req->sv1 = newSVsv (fh_or_path);
		1273
		1274	if (SvPOK (req->sv1))
		1275	{
		1276	req->type = ix;
		1277	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1278	}
		1279	else
		1280	{
		1281	req->type = EIO_FCHMOD;
		1282	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1283	}
		1284
		1285	REQ_SEND;
		1286	}
		1287
		1288	void
		1289	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1290	PPCODE:
		1291	{
		1292	dREQ;
		1293
		1294	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1295	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1296	req->sv1 = newSVsv (fh_or_path);
		1297
		1298	if (SvPOK (req->sv1))
		1299	{
		1300	req->type = EIO_CHOWN;
		1301	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1302	}
		1303	else
		1304	{
		1305	req->type = EIO_FCHOWN;
		1306	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1307	}
		1308
		1309	REQ_SEND;
		1310	}
		1311
		1312	void
		1313	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1314	PPCODE:
		1315	{
		1316	dREQ;
		1317
		1318	req->type = EIO_READDIR;
		1319	req->sv1 = newSVsv (pathname);
		1320	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1321	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1322
		1323	if (flags & EIO_READDIR_DENTS)
		1324	req->int1 |= EIO_READDIR_CUSTOM2;
		1325
		1326	REQ_SEND;
		1327	}
		1328
		1329	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	1330	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	1331	ALIAS:
1230	aio_unlink = REQ_UNLINK	1332	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	1333	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	1334	aio_readdir = EIO_READDIR
1233	PPCODE:	1335	PPCODE:
1234	{	1336	{
1235	dREQ;	1337	dREQ;
1236		1338
1237	req->type = ix;	1339	req->type = ix;
1238	req->data = newSVsv (pathname);	1340	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	1341	req->ptr1 = SvPVbyte_nolen (req->sv1);
1240		1342
1241	REQ_SEND;	1343	REQ_SEND;
1242	}	1344	}
1243		1345
1244	void	1346	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1347	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1246	SV * oldpath
1247	SV * newpath
1248	SV * callback
1249	ALIAS:	1348	ALIAS:
1250	aio_link = REQ_LINK	1349	aio_link = EIO_LINK
1251	aio_symlink = REQ_SYMLINK	1350	aio_symlink = EIO_SYMLINK
1252	aio_rename = REQ_RENAME	1351	aio_rename = EIO_RENAME
1253	PPCODE:	1352	PPCODE:
1254	{	1353	{
1255	dREQ;	1354	dREQ;
1256		1355
1257	req->type = ix;	1356	req->type = ix;
1258	req->fh = newSVsv (oldpath);	1357	req->sv1 = newSVsv (oldpath);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	1358	req->ptr1 = SvPVbyte_nolen (req->sv1);
1260	req->data = newSVsv (newpath);	1359	req->sv2 = newSVsv (newpath);
1261	req->dataptr = SvPVbyte_nolen (req->data);	1360	req->ptr2 = SvPVbyte_nolen (req->sv2);
1262		1361
1263	REQ_SEND;	1362	REQ_SEND;
1264	}	1363	}
1265		1364
1266	void	1365	void
1267	aio_busy (delay,callback=&PL_sv_undef)	1366	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	1367	PPCODE:
1271	{	1368	{
1272	dREQ;	1369	dREQ;
1273		1370
1274	req->type = REQ_BUSY;	1371	req->type = EIO_MKNOD;
1275	req->fd = delay < 0. ? 0 : delay;	1372	req->sv1 = newSVsv (pathname);
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1373	req->ptr1 = SvPVbyte_nolen (req->sv1);
1277		1374	req->int2 = (mode_t)mode;
		1375	req->offs = dev;
		1376
1278	REQ_SEND;	1377	REQ_SEND;
1279	}	1378	}
1280		1379
1281	void	1380	void
1282	aio_group (callback=&PL_sv_undef)	1381	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1283	SV * callback	1382	ALIAS:
1284	PROTOTYPE: ;$	1383	aio_mtouch = EIO_MTOUCH
		1384	aio_msync = EIO_MSYNC
1285	PPCODE:	1385	PPCODE:
1286	{	1386	{
		1387	STRLEN svlen;
		1388	char *svptr = SvPVbyte (data, svlen);
		1389	UV len = SvUV (length);
		1390
		1391	if (offset < 0)
		1392	offset += svlen;
		1393
		1394	if (offset < 0 || offset > svlen)
		1395	croak ("offset outside of scalar");
		1396
		1397	if (!SvOK (length) || len + offset > svlen)
		1398	len = svlen - offset;
		1399
		1400	{
		1401	dREQ;
		1402
		1403	req->type = ix;
		1404	req->sv2 = SvREFCNT_inc (data);
		1405	req->ptr2 = (char *)svptr + offset;
		1406	req->size = len;
		1407	req->int1 = flags;
		1408
		1409	REQ_SEND;
		1410	}
		1411	}
		1412
		1413	void
		1414	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1415	PPCODE:
		1416	{
		1417	STRLEN svlen;
		1418	char *svptr = SvPVbyte (data, svlen);
		1419	UV len = SvUV (length);
		1420
		1421	if (offset < 0)
		1422	offset += svlen;
		1423
		1424	if (offset < 0 || offset > svlen)
		1425	croak ("offset outside of scalar");
		1426
		1427	if (!SvOK (length) || len + offset > svlen)
		1428	len = svlen - offset;
		1429
		1430	{
		1431	dREQ;
		1432
		1433	req->type = EIO_MLOCK;
		1434	req->sv2 = SvREFCNT_inc (data);
		1435	req->ptr2 = (char *)svptr + offset;
		1436	req->size = len;
		1437
		1438	REQ_SEND;
		1439	}
		1440	}
		1441
		1442	void
		1443	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1444	PPCODE:
		1445	{
		1446	dREQ;
		1447
		1448	req->type = EIO_MLOCKALL;
		1449	req->int1 = flags;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
		1455	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1456	PPCODE:
		1457	{
1287	dREQ;	1458	dREQ;
1288		1459
		1460	req->type = EIO_BUSY;
		1461	req->nv1 = delay < 0. ? 0. : delay;
		1462
		1463	REQ_SEND;
		1464	}
		1465
		1466	void
		1467	aio_group (SV *callback=&PL_sv_undef)
		1468	PPCODE:
		1469	{
		1470	dREQ;
		1471
1289	req->type = REQ_GROUP;	1472	req->type = EIO_GROUP;
		1473
1290	req_send (req);	1474	req_submit (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1475	XPUSHs (req_sv (req, aio_grp_stash));
1293	}	1476	}
1294		1477
1295	void	1478	void
1296	aio_nop (callback=&PL_sv_undef)	1479	aio_nop (SV *callback=&PL_sv_undef)
1297	SV * callback	1480	ALIAS:
		1481	aio_nop = EIO_NOP
		1482	aio_sync = EIO_SYNC
1298	PPCODE:	1483	PPCODE:
1299	{	1484	{
1300	dREQ;	1485	dREQ;
1301		1486
1302	req->type = REQ_NOP;	1487	req->type = ix;
1303		1488
1304	REQ_SEND;	1489	REQ_SEND;
1305	}	1490	}
1306		1491
1307	void	1492	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1493	aioreq_pri (int pri = 0)
1309	CODE:	1494	CODE:
		1495	RETVAL = next_pri;
		1496	if (items > 0)
		1497	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1498	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1499	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1500	next_pri = pri;
		1501	}
		1502	OUTPUT:
		1503	RETVAL
1313		1504
1314	void	1505	void
1315	aioreq_nice (int nice = 0)	1506	aioreq_nice (int nice = 0)
1316	CODE:	1507	CODE:
1317	nice = next_pri - nice;	1508	nice = next_pri - nice;
1318	if (nice < PRI_MIN) nice = PRI_MIN;	1509	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1319	if (nice > PRI_MAX) nice = PRI_MAX;	1510	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1320	next_pri = nice + PRI_BIAS;	1511	next_pri = nice;
1321		1512
1322	void	1513	void
1323	flush ()	1514	flush ()
1324	PROTOTYPE:
1325	CODE:	1515	CODE:
1326	while (nreqs)	1516	while (eio_nreqs ())
1327	{	1517	{
1328	poll_wait ();	1518	poll_wait ();
1329	poll_cb ();	1519	poll_cb ();
1330	}	1520	}
1331		1521
1332	void	1522	int
1333	poll()	1523	poll ()
1334	PROTOTYPE:
1335	CODE:	1524	CODE:
1336	if (nreqs)
1337	{
1338	poll_wait ();	1525	poll_wait ();
1339	poll_cb ();	1526	RETVAL = poll_cb ();
1340	}
1341
1342	int
1343	poll_fileno()
1344	PROTOTYPE:
1345	CODE:
1346	RETVAL = respipe [0];
1347	OUTPUT:	1527	OUTPUT:
1348	RETVAL	1528	RETVAL
1349		1529
1350	int	1530	int
		1531	poll_fileno ()
		1532	CODE:
		1533	RETVAL = s_epipe_fd (&respipe);
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
1351	poll_cb(...)	1538	poll_cb (...)
1352	PROTOTYPE:	1539	PROTOTYPE:
1353	CODE:	1540	CODE:
1354	RETVAL = poll_cb ();	1541	RETVAL = poll_cb ();
1355	OUTPUT:	1542	OUTPUT:
1356	RETVAL	1543	RETVAL
1357		1544
1358	void	1545	void
1359	poll_wait()	1546	poll_wait ()
1360	PROTOTYPE:
1361	CODE:	1547	CODE:
1362	if (nreqs)
1363	poll_wait ();	1548	poll_wait ();
1364		1549
1365	int	1550	int
1366	nreqs()	1551	nreqs ()
1367	PROTOTYPE:
1368	CODE:	1552	CODE:
1369	RETVAL = nreqs;	1553	RETVAL = eio_nreqs ();
1370	OUTPUT:	1554	OUTPUT:
1371	RETVAL	1555	RETVAL
1372		1556
		1557	int
		1558	nready ()
		1559	CODE:
		1560	RETVAL = eio_nready ();
		1561	OUTPUT:
		1562	RETVAL
		1563
		1564	int
		1565	npending ()
		1566	CODE:
		1567	RETVAL = eio_npending ();
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	nthreads ()
		1573	CODE:
		1574	RETVAL = eio_nthreads ();
		1575	OUTPUT:
		1576	RETVAL
		1577
		1578	int
		1579	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1580	CODE:
		1581	RETVAL = posix_fadvise (fh, offset, length, advice);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	ssize_t
		1586	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1587	CODE:
		1588	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1594	PPCODE:
		1595	sv_unmagic (scalar, MMAP_MAGIC);
		1596	{
		1597	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1598	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1599	if (addr == (void *)-1)
		1600	XSRETURN_NO;
		1601
		1602	sv_force_normal (scalar);
		1603
		1604	/* we store the length in mg_obj, as namlen is I32 :/ */
		1605	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1606	->mg_obj = (SV *)length;
		1607
		1608	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1609
		1610	if (!(prot & PROT_WRITE))
		1611	SvREADONLY_on (scalar);
		1612
		1613	if (SvLEN (scalar))
		1614	Safefree (SvPVX (scalar));
		1615
		1616	SvPVX (scalar) = (char *)addr;
		1617	SvCUR_set (scalar, length);
		1618	SvLEN_set (scalar, 0);
		1619	SvPOK_only (scalar);
		1620
		1621	XSRETURN_YES;
		1622	}
		1623
		1624	void
		1625	munmap (SV *scalar)
		1626	CODE:
		1627	sv_unmagic (scalar, MMAP_MAGIC);
		1628
		1629	int
		1630	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1631	ALIAS:
		1632	mprotect = 1
		1633	CODE:
		1634	{
		1635	STRLEN svlen;
		1636	void *addr = SvPVbyte (scalar, svlen);
		1637	size_t len = SvUV (length);
		1638
		1639	if (offset < 0)
		1640	offset += svlen;
		1641
		1642	if (offset < 0 || offset > svlen)
		1643	croak ("offset outside of scalar");
		1644
		1645	if (!SvOK (length) || len + offset > svlen)
		1646	len = svlen - offset;
		1647
		1648	addr = (void *)(((intptr_t)addr) + offset);
		1649	eio_page_align (&addr, &len);
		1650
		1651	switch (ix)
		1652	{
		1653	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1654	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1655	}
		1656	}
		1657	OUTPUT:
		1658	RETVAL
		1659
		1660	int
		1661	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1662	CODE:
		1663	{
		1664	STRLEN svlen;
		1665	void *addr = SvPVbyte (scalar, svlen);
		1666	size_t len = SvUV (length);
		1667
		1668	if (offset < 0)
		1669	offset += svlen;
		1670
		1671	if (offset < 0 || offset > svlen)
		1672	croak ("offset outside of scalar");
		1673
		1674	if (!SvOK (length) || len + offset > svlen)
		1675	len = svlen - offset;
		1676
		1677	addr = (void *)(((intptr_t)addr) + offset);
		1678	eio_page_align (&addr, &len);
		1679	#if _POSIX_MEMLOCK_RANGE
		1680	RETVAL = munlock (addr, len);
		1681	#else
		1682	RETVAL = ((errno = ENOSYS), -1);
		1683	#endif
		1684	}
		1685	OUTPUT:
		1686	RETVAL
		1687
		1688	int
		1689	munlockall ()
		1690	CODE:
		1691	#if _POSIX_MEMLOCK
		1692	munlockall ();
		1693	#else
		1694	RETVAL = -1;
		1695	errno = ENOSYS;
		1696	#endif
		1697	OUTPUT:
		1698	RETVAL
		1699
		1700	void _on_next_submit (SV *cb)
		1701	CODE:
		1702	SvREFCNT_dec (on_next_submit);
		1703	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1704
1373	PROTOTYPES: DISABLE	1705	PROTOTYPES: DISABLE
1374		1706
1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1707	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1376		1708
1377	void	1709	void
1378	cancel (aio_req_ornot req)	1710	cancel (aio_req_ornot req)
1379	CODE:	1711	CODE:
1380	req_cancel (req);	1712	eio_cancel (req);
1381		1713
1382	void	1714	void
1383	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1715	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1384	CODE:	1716	PPCODE:
		1717	{
		1718	if (GIMME_V != G_VOID)
		1719	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1720
		1721	if (items > 1)
		1722	{
		1723	SV *cb_cv =get_cb (callback);
		1724
1385	SvREFCNT_dec (req->callback);	1725	SvREFCNT_dec (req->callback);
1386	req->callback = newSVsv (callback);	1726	req->callback = SvREFCNT_inc (cb_cv);
		1727	}
		1728	}
1387		1729
1388	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1730	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1389		1731
1390	void	1732	void
1391	add (aio_req grp, ...)	1733	add (aio_req grp, ...)
1392	PPCODE:	1734	PPCODE:
1393	{	1735	{
1394	int i;	1736	int i;
1395	aio_req req;
1396		1737
1397	if (grp->fd == 2)	1738	if (grp->int1 == 2)
1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1739	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1399		1740
1400	for (i = 1; i < items; ++i )	1741	for (i = 1; i < items; ++i )
1401	{	1742	{
		1743	aio_req req;
		1744
1402	if (GIMME_V != G_VOID)	1745	if (GIMME_V != G_VOID)
1403	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1746	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1404		1747
1405	req = SvAIO_REQ (ST (i));	1748	req = SvAIO_REQ (ST (i));
1406		1749
1407	if (req)	1750	if (req)
1408	{	1751	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	}	1752	}
1421	}	1753	}
		1754
		1755	void
		1756	cancel_subs (aio_req_ornot req)
		1757	CODE:
		1758	req_cancel_subs (req);
1422		1759
1423	void	1760	void
1424	result (aio_req grp, ...)	1761	result (aio_req grp, ...)
1425	CODE:	1762	CODE:
1426	{	1763	{
1427	int i;	1764	int i;
		1765	AV *av;
		1766
		1767	grp->errorno = errno;
		1768
1428	AV *av = newAV ();	1769	av = newAV ();
		1770	av_extend (av, items - 1);
1429		1771
1430	for (i = 1; i < items; ++i )	1772	for (i = 1; i < items; ++i )
1431	av_push (av, newSVsv (ST (i)));	1773	av_push (av, newSVsv (ST (i)));
1432		1774
1433	SvREFCNT_dec (grp->data);	1775	SvREFCNT_dec (grp->sv1);
1434	grp->data = (SV *)av;	1776	grp->sv1 = (SV *)av;
1435	}	1777	}
		1778
		1779	void
		1780	errno (aio_req grp, int errorno = errno)
		1781	CODE:
		1782	grp->errorno = errorno;
1436		1783
1437	void	1784	void
1438	limit (aio_req grp, int limit)	1785	limit (aio_req grp, int limit)
1439	CODE:	1786	CODE:
1440	grp->fd2 = limit;	1787	eio_grp_limit (grp, limit);
1441	aio_grp_feed (grp);
1442		1788
1443	void	1789	void
1444	feed (aio_req grp, SV *callback=&PL_sv_undef)	1790	feed (aio_req grp, SV *callback=&PL_sv_undef)
1445	CODE:	1791	CODE:
1446	{	1792	{
1447	SvREFCNT_dec (grp->fh2);	1793	SvREFCNT_dec (grp->sv2);
1448	grp->fh2 = newSVsv (callback);	1794	grp->sv2 = newSVsv (callback);
		1795	grp->feed = aio_grp_feed;
1449		1796
1450	if (grp->fd2 <= 0)	1797	if (grp->int2 <= 0)
1451	grp->fd2 = 2;	1798	grp->int2 = 2;
1452		1799
1453	aio_grp_feed (grp);	1800	eio_grp_limit (grp, grp->int2);
1454	}	1801	}
1455		1802

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