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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC vs.
Revision 1.166 by root, Sun May 9 20:43:28 2010 UTC

1	#include "xthread.h"	1	#include "libeio/xthread.h"
2		2
3	#include <errno.h>	3	#include <errno.h>
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "autoconf/config.h"	9	#include "schmorp.h"
10		10
11	#include <stddef.h>	11	#include <stddef.h>
12	#include <stdlib.h>	12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
18	#include <limits.h>	17	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	18	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	19	#include <sched.h>
23		20
24	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
25	# if __linux
26	# include <sys/sendfile.h>	22	# include <sys/mman.h>
27	# elif __freebsd	23	#endif
28	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
29	# include <sys/uio.h>	68	# include <sys/time.h>
30	# elif __hpux
31	# include <sys/socket.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
34	# else	186	# else
35	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	188	# endif
37	#endif	189	#endif
38		190	#ifndef MAP_HUGETLB
39	/* number of seconds after which idle threads exit */	191	# define MAP_HUGETLB 0
40	#define IDLE_TIMEOUT 10
41
42	/* used for struct dirent, AIX doesn't provide it */
43	#ifndef NAME_MAX
44	# define NAME_MAX 4096
45	#endif	192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
		195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
46		205
47	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
48	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
49		209
50	#define dBUF \	210	static int req_invoke (eio_req *req);
51	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
52	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
54	UNLOCK (wrklock); \
55	if (!aio_buf) \
56	return -1;
57
58	typedef SV SV8; /* byte-sv, used for argument-checking */
59		214
60	enum {	215	enum {
61	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
62	REQ_OPEN, REQ_CLOSE,
63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
64	REQ_SENDFILE,
65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
66	REQ_FSYNC, REQ_FDATASYNC,
67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
68	REQ_MKNOD, REQ_READDIR,
69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
70	REQ_GROUP, REQ_NOP,
71	REQ_BUSY,
72	};	217	};
73		218
74	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
75	#define AIO_GRP_KLASS "IO::AIO::GRP"
76		220
77	typedef struct aio_cb
78	{
79	struct aio_cb *volatile next;
80
81	SV *callback, *fh;
82	SV *sv1, *sv2;
83	void *ptr1, *ptr2;
84	off_t offs;
85	size_t size;
86	ssize_t result;
87
88	STRLEN stroffset;
89	int type;
90	int int1, int2;
91	int errorno;
92	mode_t mode; /* open */
93
94	unsigned char flags;
95	unsigned char pri;
96
97	SV *self; /* the perl counterpart of this request, if any */
98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
99	} aio_cb;
100
101	enum {
102	FLAG_CANCELLED = 0x01, /* request was cancelled */
103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
105	};
106
107	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
108	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
109		223
110	enum {	224	static SV *on_next_submit;
111	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
112	PRI_MAX = 4,	226	static int max_outstanding;
113		227
114	DEFAULT_PRI = 0,	228	static s_epipe respipe;
115	PRI_BIAS = -PRI_MIN,
116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
117	};
118		229
119	#define AIO_TICKS ((1000000 + 1023) >> 10)
120
121	static unsigned int max_poll_time = 0;
122	static unsigned int max_poll_reqs = 0;
123
124	/* calculcate time difference in ~1/AIO_TICKS of a second */
125	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
126	{
127	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
128	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
129	}
130
131	static thread_t main_tid;
132	static int main_sig;
133	static int block_sig_level;
134
135	void block_sig ()
136	{
137	sigset_t ss;
138
139	if (block_sig_level++)
140	return;
141
142	if (!main_sig)
143	return;
144
145	sigemptyset (&ss);
146	sigaddset (&ss, main_sig);
147	pthread_sigmask (SIG_BLOCK, &ss, 0);
148	}
149
150	void unblock_sig ()
151	{
152	sigset_t ss;
153
154	if (--block_sig_level)
155	return;
156
157	if (!main_sig)
158	return;
159
160	sigemptyset (&ss);
161	sigaddset (&ss, main_sig);
162	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	/* worker threads management */
170	static mutex_t wrklock = MUTEX_INIT;
171
172	typedef struct worker {
173	/* locked by wrklock */
174	struct worker *prev, *next;
175
176	thread_t tid;
177
178	/* locked by reslock, reqlock or wrklock */
179	aio_req req; /* currently processed request */
180	void *dbuf;
181	DIR *dirp;
182	} worker;
183
184	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
185
186	static void worker_clear (worker *wrk)
187	{
188	if (wrk->dirp)
189	{
190	closedir (wrk->dirp);
191	wrk->dirp = 0;
192	}
193
194	if (wrk->dbuf)
195	{
196	free (wrk->dbuf);
197	wrk->dbuf = 0;
198	}
199	}
200
201	static void worker_free (worker *wrk)
202	{
203	wrk->next->prev = wrk->prev;
204	wrk->prev->next = wrk->next;
205
206	free (wrk);
207	}
208
209	static volatile unsigned int nreqs, nready, npending;
210	static volatile unsigned int max_idle = 4;
211	static volatile unsigned int max_outstanding = 0xffffffff;
212	static int respipe [2];
213
214	static mutex_t reslock = MUTEX_INIT;
215	static mutex_t reqlock = MUTEX_INIT;
216	static cond_t reqwait = COND_INIT;
217
218	#if WORDACCESS_UNSAFE
219
220	static unsigned int get_nready ()
221	{
222	unsigned int retval;
223
224	LOCK (reqlock);
225	retval = nready;
226	UNLOCK (reqlock);
227
228	return retval;
229	}
230
231	static unsigned int get_npending ()
232	{
233	unsigned int retval;
234
235	LOCK (reslock);
236	retval = npending;
237	UNLOCK (reslock);
238
239	return retval;
240	}
241
242	static unsigned int get_nthreads ()
243	{
244	unsigned int retval;
245
246	LOCK (wrklock);
247	retval = started;
248	UNLOCK (wrklock);
249
250	return retval;
251	}
252
253	#else
254
255	# define get_nready() nready
256	# define get_npending() npending
257	# define get_nthreads() started
258
259	#endif
260
261	/*
262	* a somewhat faster data structure might be nice, but
263	* with 8 priorities this actually needs <20 insns
264	* per shift, the most expensive operation.
265	*/
266	typedef struct {
267	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
268	int size;
269	} reqq;
270
271	static reqq req_queue;
272	static reqq res_queue;
273
274	int reqq_push (reqq *q, aio_req req)
275	{
276	int pri = req->pri;
277	req->next = 0;
278
279	if (q->qe[pri])
280	{
281	q->qe[pri]->next = req;
282	q->qe[pri] = req;
283	}
284	else
285	q->qe[pri] = q->qs[pri] = req;
286
287	return q->size++;
288	}
289
290	aio_req reqq_shift (reqq *q)
291	{
292	int pri;
293
294	if (!q->size)
295	return 0;
296
297	--q->size;
298
299	for (pri = NUM_PRI; pri--; )
300	{
301	aio_req req = q->qs[pri];
302
303	if (req)
304	{
305	if (!(q->qs[pri] = req->next))
306	q->qe[pri] = 0;
307
308	return req;
309	}
310	}
311
312	abort ();
313	}
314
315	static int poll_cb ();
316	static int req_invoke (aio_req req);
317	static void req_free (aio_req req);	230	static void req_destroy (aio_req req);
318	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
319		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
320	/* must be called at most once */	245	/* must be called at most once */
321	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
322	{	247	{
323	if (!req->self)	248	if (!req->self)
324	{	249	{
325	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
326	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
327	}	252	}
328		253
329	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
330	}	255	}
331		256
332	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
333	{	258	{
334	MAGIC *mg;	259	MAGIC *mg;
335		260
336	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
337	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
338		266
339	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
340		268
341	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
342	}	270	}
343		271
344	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
345	{	273	{
346	block_sig ();	274	if (grp->sv2 && SvOK (grp->sv2))
347
348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
349	{	275	{
350	int old_len = grp->size;
351
352	if (grp->sv2 && SvOK (grp->sv2))
353	{
354	dSP;	276	dSP;
355		277
356	ENTER;	278	ENTER;
357	SAVETMPS;	279	SAVETMPS;
358	PUSHMARK (SP);	280	PUSHMARK (SP);
359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
360	PUTBACK;	282	PUTBACK;
361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
362	SPAGAIN;	284	SPAGAIN;
363	FREETMPS;	285	FREETMPS;
364	LEAVE;	286	LEAVE;
365	}
366
367	/* stop if no progress has been made */
368	if (old_len == grp->size)
369	{
370	SvREFCNT_dec (grp->sv2);
371	grp->sv2 = 0;
372	break;
373	}
374	}	287	}
375
376	unblock_sig ();
377	}	288	}
378		289
379	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
380	{	291	{
381	--grp->size;	292	eio_submit (req);
382		293
383	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
384	aio_grp_feed (grp);
385
386	/* finish, if done */
387	if (!grp->size && grp->int1)
388	{	295	{
389	block_sig ();	296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
390		298
391	if (!req_invoke (grp))	299	on_next_submit = 0;
392	{
393	req_free (grp);
394	unblock_sig ();
395	croak (0);
396	}
397		300
398	req_free (grp);	301	PUSHMARK (SP);
399	unblock_sig ();	302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
400	}	304	}
401	}	305	}
402		306
403	static int req_invoke (aio_req req)	307	static int req_invoke (eio_req *req)
404	{	308	{
405	dSP;
406
407	if (req->flags & FLAG_SV1_RO_OFF)	309	if (req->flags & FLAG_SV2_RO_OFF)
408	SvREADONLY_off (req->sv1);	310	SvREADONLY_off (req->sv2);
409		311
410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	312	if (!EIO_CANCELLED (req) && req->callback)
411	{	313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
412	ENTER;	318	ENTER;
413	SAVETMPS;	319	SAVETMPS;
414	PUSHMARK (SP);	320	PUSHMARK (SP);
415	EXTEND (SP, 1);	321	EXTEND (SP, 1);
416		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
		325	{
		326	sv_result = sv_result_cache; sv_result_cache = 0;
		327	SvIV_set (sv_result, req->result);
		328	}
		329	else
		330	{
		331	sv_result = newSViv (req->result);
		332	SvREADONLY_on (sv_result);
		333	}
		334
417	switch (req->type)	335	switch (req->type)
418	{	336	{
419	case REQ_READDIR:	337	case EIO_READDIR:
420	{	338	{
421	SV *rv = &PL_sv_undef;	339	SV *rv = &PL_sv_undef;
422		340
423	if (req->result >= 0)	341	if (req->result >= 0)
424	{	342	{
425	int i;	343	int i;
426	char *buf = req->ptr2;	344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
427	AV *av = newAV ();	346	AV *av = newAV ();
428		347
429	av_extend (av, req->result - 1);	348	av_extend (av, req->result - 1);
430		349
431	for (i = 0; i < req->result; ++i)	350	for (i = 0; i < req->result; ++i)
432	{	351	{
433	SV *sv = newSVpv (buf, 0);	352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
434		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
435	av_store (av, i, sv);	376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
436	buf += SvCUR (sv) + 1;	384	names += SvCUR (name) + 1;
		385	}
437	}	386	}
438		387
439	rv = sv_2mortal (newRV_noinc ((SV *)av));	388	rv = sv_2mortal (newRV_noinc ((SV *)av));
440	}	389	}
441		390
442	PUSHs (rv);	391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
443	}	395	}
444	break;	396	break;
445		397
446	case REQ_OPEN:	398	case EIO_OPEN:
447	{	399	{
448	/* convert fd to fh */	400	/* convert fd to fh */
449	SV *fh;	401	SV *fh = &PL_sv_undef;
450		402
451	PUSHs (sv_2mortal (newSViv (req->result)));	403	if (req->result >= 0)
452	PUTBACK;	404	{
453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	405	GV *gv = (GV *)sv_newmortal ();
454	SPAGAIN;	406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
455		412
456	fh = POPs;	413	symlen = snprintf (
457	PUSHMARK (SP);	414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
458	XPUSHs (fh);	425	PUSHs (fh);
459	}	426	}
460	break;	427	break;
461		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
462	case REQ_GROUP:	459	case EIO_GROUP:
463	req->int1 = 2; /* mark group as finished */	460	req->int1 = 2; /* mark group as finished */
464		461
465	if (req->sv1)	462	if (req->sv1)
466	{	463	{
467	int i;	464	int i;
…		…
471	for (i = 0; i <= AvFILL (av); ++i)	468	for (i = 0; i <= AvFILL (av); ++i)
472	PUSHs (*av_fetch (av, i, 0));	469	PUSHs (*av_fetch (av, i, 0));
473	}	470	}
474	break;	471	break;
475		472
476	case REQ_NOP:	473	case EIO_NOP:
477	case REQ_BUSY:	474	case EIO_BUSY:
478	break;	475	break;
479		476
480	case REQ_READLINK:	477	case EIO_READLINK:
481	if (req->result > 0)	478	if (req->result > 0)
482	{	479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
483	SvCUR_set (req->sv1, req->result);
484	*SvEND (req->sv1) = 0;
485	PUSHs (req->sv1);
486	}
487	break;	480	break;
488		481
489	case REQ_STAT:	482	case EIO_STAT:
490	case REQ_LSTAT:	483	case EIO_LSTAT:
491	case REQ_FSTAT:	484	case EIO_FSTAT:
492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
493	PL_laststatval = req->result;	486	PL_laststatval = req->result;
494	PL_statcache = *(Stat_t *)(req->ptr2);	487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
495	PUSHs (sv_2mortal (newSViv (req->result)));	488	PUSHs (sv_result);
496	break;	489	break;
497		490
498	case REQ_READ:	491	case EIO_READ:
		492	{
499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
500	*SvEND (req->sv1) = 0;	494	*SvEND (req->sv2) = 0;
501	PUSHs (sv_2mortal (newSViv (req->result)));	495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
502	break;	499	break;
503		500
		501	case EIO_DUP2:
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
504	default:	506	default:
505	PUSHs (sv_2mortal (newSViv (req->result)));	507	PUSHs (sv_result);
506	break;	508	break;
507	}	509	}
508		510
509	errno = req->errorno;	511	errno = req->errorno;
510		512
511	PUTBACK;	513	PUTBACK;
512	call_sv (req->callback, G_VOID | G_EVAL);	514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
513	SPAGAIN;	515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
514		521
515	FREETMPS;	522	FREETMPS;
516	LEAVE;	523	LEAVE;
		524
		525	PUTBACK;
517	}	526	}
518		527
519	if (req->grp)
520	{
521	aio_req grp = req->grp;
522
523	/* unlink request */
524	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
525	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
526
527	if (grp->grp_first == req)
528	grp->grp_first = req->grp_next;
529
530	aio_grp_dec (grp);
531	}
532
533	return !SvTRUE (ERRSV);	528	return !!SvTRUE (ERRSV);
534	}	529	}
535		530
536	static void req_free (aio_req req)	531	static void req_destroy (aio_req req)
537	{	532	{
538	if (req->self)	533	if (req->self)
539	{	534	{
540	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
541	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
542	}	537	}
543		538
544	SvREFCNT_dec (req->fh);
545	SvREFCNT_dec (req->sv1);	539	SvREFCNT_dec (req->sv1);
546	SvREFCNT_dec (req->sv2);	540	SvREFCNT_dec (req->sv2);
547	SvREFCNT_dec (req->callback);	541	SvREFCNT_dec (req->callback);
548		542
549	if (req->flags & FLAG_PTR2_FREE)
550	free (req->ptr2);
551
552	Safefree (req);	543	Safefree (req);
553	}	544	}
554		545
555	static void req_cancel_subs (aio_req grp)	546	static void req_cancel_subs (aio_req grp)
556	{	547	{
557	aio_req sub;	548	aio_req sub;
558		549
559	if (grp->type != REQ_GROUP)	550	if (grp->type != EIO_GROUP)
560	return;	551	return;
561		552
562	SvREFCNT_dec (grp->sv2);	553	SvREFCNT_dec (grp->sv2);
563	grp->sv2 = 0;	554	grp->sv2 = 0;
564		555
565	for (sub = grp->grp_first; sub; sub = sub->grp_next)	556	eio_grp_cancel (grp);
566	req_cancel (sub);
567	}	557	}
568		558
569	static void req_cancel (aio_req req)	559	static void
		560	create_respipe (void)
570	{	561	{
571	req->flags |= FLAG_CANCELLED;	562	if (s_epipe_renew (&respipe))
572		563	croak ("IO::AIO: unable to initialize result pipe");
573	req_cancel_subs (req);
574	}	564	}
575		565
576	static void *aio_proc(void *arg);
577
578	static void start_thread (void)
579	{
580	worker *wrk = calloc (1, sizeof (worker));
581
582	if (!wrk)
583	croak ("unable to allocate worker thread data");
584
585	LOCK (wrklock);
586
587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
588	{
589	wrk->prev = &wrk_first;
590	wrk->next = wrk_first.next;
591	wrk_first.next->prev = wrk;
592	wrk_first.next = wrk;
593	++started;
594	}
595	else
596	free (wrk);
597
598	UNLOCK (wrklock);
599	}
600
601	static void maybe_start_thread ()
602	{
603	if (get_nthreads () >= wanted)
604	return;
605
606	/* todo: maybe use idle here, but might be less exact */
607	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
608	return;
609
610	start_thread ();
611	}
612
613	static void req_send (aio_req req)
614	{
615	block_sig ();
616
617	++nreqs;
618
619	LOCK (reqlock);
620	++nready;
621	reqq_push (&req_queue, req);
622	COND_SIGNAL (reqwait);
623	UNLOCK (reqlock);
624
625	unblock_sig ();
626
627	maybe_start_thread ();
628	}
629
630	static void end_thread (void)
631	{
632	aio_req req;
633
634	Newz (0, req, 1, aio_cb);
635
636	req->type = REQ_QUIT;
637	req->pri = PRI_MAX + PRI_BIAS;
638
639	LOCK (reqlock);
640	reqq_push (&req_queue, req);
641	COND_SIGNAL (reqwait);
642	UNLOCK (reqlock);
643
644	LOCK (wrklock);
645	--started;
646	UNLOCK (wrklock);
647	}
648
649	static void set_max_idle (int nthreads)
650	{
651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
652	max_idle = nthreads <= 0 ? 1 : nthreads;
653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
654	}
655
656	static void min_parallel (int nthreads)
657	{
658	if (wanted < nthreads)
659	wanted = nthreads;
660	}
661
662	static void max_parallel (int nthreads)
663	{
664	if (wanted > nthreads)
665	wanted = nthreads;
666
667	while (started > wanted)
668	end_thread ();
669	}
670
671	static void poll_wait ()	566	static void poll_wait (void)
672	{	567	{
673	fd_set rfd;
674
675	while (nreqs)	568	while (eio_nreqs ())
676	{	569	{
677	int size;	570	int size;
678	if (WORDACCESS_UNSAFE) LOCK (reslock);	571
		572	X_LOCK (reslock);
679	size = res_queue.size;	573	size = res_queue.size;
680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	574	X_UNLOCK (reslock);
681		575
682	if (size)	576	if (size)
683	return;	577	return;
684		578
685	maybe_start_thread ();	579	etp_maybe_start_thread ();
686		580
687	FD_ZERO(&rfd);	581	s_epipe_wait (&respipe);
688	FD_SET(respipe [0], &rfd);
689
690	select (respipe [0] + 1, &rfd, 0, 0, 0);
691	}	582	}
692	}	583	}
693		584
694	static int poll_cb ()	585	static int poll_cb (void)
695	{	586	{
696	dSP;
697	int count = 0;
698	int maxreqs = max_poll_reqs;
699	int do_croak = 0;
700	struct timeval tv_start, tv_now;
701	aio_req req;
702
703	if (max_poll_time)
704	gettimeofday (&tv_start, 0);
705
706	block_sig ();
707
708	for (;;)	587	for (;;)
709	{	588	{
710	for (;;)	589	int res = eio_poll ();
711	{
712	maybe_start_thread ();
713		590
714	LOCK (reslock);	591	if (res > 0)
715	req = reqq_shift (&res_queue);
716
717	if (req)
718	{
719	--npending;
720
721	if (!res_queue.size)
722	{
723	/* read any signals sent by the worker threads */
724	char buf [4];
725	while (read (respipe [0], buf, 4) == 4)
726	;
727	}
728	}
729
730	UNLOCK (reslock);
731
732	if (!req)
733	break;
734
735	--nreqs;
736
737	if (req->type == REQ_GROUP && req->size)
738	{
739	req->int1 = 1; /* mark request as delayed */
740	continue;
741	}
742	else
743	{
744	if (!req_invoke (req))
745	{
746	req_free (req);
747	unblock_sig ();
748	croak (0);	592	croak (0);
749	}
750		593
751	count++;	594	if (!max_outstanding || max_outstanding > eio_nreqs ())
752	}	595	return res;
753
754	req_free (req);
755
756	if (maxreqs && !--maxreqs)
757	break;
758
759	if (max_poll_time)
760	{
761	gettimeofday (&tv_now, 0);
762
763	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
764	break;
765	}
766	}
767
768	if (nreqs <= max_outstanding)
769	break;
770		596
771	poll_wait ();	597	poll_wait ();
772
773	++maxreqs;
774	}	598	}
775
776	unblock_sig ();
777	return count;
778	}	599	}
779		600
780	static void create_pipe ()	601	static void atfork_child (void)
781	{	602	{
782	if (pipe (respipe))	603	create_respipe ();
783	croak ("unable to initialize result pipe");
784
785	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
786	croak ("cannot set result pipe to nonblocking mode");
787
788	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790	}	604	}
791		605
792	/*****************************************************************************/	606	/*****************************************************************************/
793	/* work around various missing functions */
794		607
795	#if !HAVE_PREADWRITE	608	#if !_POSIX_MAPPED_FILES
796	# define pread aio_pread	609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
797	# define pwrite aio_pwrite	610	# define munmap(addr,length) (errno = ENOSYS, -1)
798
799	/*
800	* make our pread/pwrite safe against themselves, but not against
801	* normal read/write by using a mutex. slows down execution a lot,
802	* but that's your problem, not mine.
803	*/
804	static mutex_t preadwritelock = MUTEX_INIT;
805
806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
807	{
808	ssize_t res;
809	off_t ooffset;
810
811	LOCK (preadwritelock);
812	ooffset = lseek (fd, 0, SEEK_CUR);
813	lseek (fd, offset, SEEK_SET);
814	res = read (fd, buf, count);
815	lseek (fd, ooffset, SEEK_SET);
816	UNLOCK (preadwritelock);
817
818	return res;
819	}
820
821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
822	{
823	ssize_t res;
824	off_t ooffset;
825
826	LOCK (preadwritelock);
827	ooffset = lseek (fd, 0, SEEK_CUR);
828	lseek (fd, offset, SEEK_SET);
829	res = write (fd, buf, count);
830	lseek (fd, offset, SEEK_SET);
831	UNLOCK (preadwritelock);
832
833	return res;
834	}
835	#endif
836
837	#if !HAVE_FDATASYNC
838	# define fdatasync fsync
839	#endif
840
841	#if !HAVE_READAHEAD
842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
843
844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
845	{
846	dBUF;
847
848	while (count > 0)
849	{
850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
851
852	pread (fd, aio_buf, len, offset);
853	offset += len;
854	count -= len;
855	}
856
857	errno = 0;
858	}
859
860	#endif
861
862	#if !HAVE_READDIR_R
863	# define readdir_r aio_readdir_r
864
865	static mutex_t readdirlock = MUTEX_INIT;
866
867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
868	{
869	struct dirent *e;
870	int errorno;
871
872	LOCK (readdirlock);
873
874	e = readdir (dirp);
875	errorno = errno;
876
877	if (e)
878	{
879	*res = ent;
880	strcpy (ent->d_name, e->d_name);
881	}
882	else
883	*res = 0;
884
885	UNLOCK (readdirlock);
886
887	errno = errorno;
888	return e ? 0 : -1;
889	}
890	#endif
891
892	/* sendfile always needs emulation */
893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
894	{
895	ssize_t res;
896
897	if (!count)
898	return 0;
899
900	#if HAVE_SENDFILE
901	# if __linux
902	res = sendfile (ofd, ifd, &offset, count);
903
904	# elif __freebsd
905	/*
906	* Of course, the freebsd sendfile is a dire hack with no thoughts
907	* wasted on making it similar to other I/O functions.
908	*/
909	{
910	off_t sbytes;
911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
912
913	if (res < 0 && sbytes)
914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
915	res = sbytes;
916	}
917
918	# elif __hpux
919	res = sendfile (ofd, ifd, offset, count, 0, 0);
920
921	# elif __solaris
922	{
923	struct sendfilevec vec;
924	size_t sbytes;
925
926	vec.sfv_fd = ifd;
927	vec.sfv_flag = 0;
928	vec.sfv_off = offset;
929	vec.sfv_len = count;
930
931	res = sendfilev (ofd, &vec, 1, &sbytes);
932
933	if (res < 0 && sbytes)
934	res = sbytes;
935	}
936
937	# endif	611	#endif
938	#else
939	res = -1;
940	errno = ENOSYS;
941	#endif
942		612
943	if (res < 0	613	#define MMAP_MAGIC PERL_MAGIC_ext
944	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
945	#if __solaris
946	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
947	#endif
948	)
949	)
950	{
951	/* emulate sendfile. this is a major pain in the ass */
952	dBUF;
953		614
954	res = 0;	615	static int
		616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		617	{
		618	int old_errno = errno;
		619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		620	errno = old_errno;
955		621
956	while (count)	622	mg->mg_obj = 0; /* just in case */
957	{
958	ssize_t cnt;
959
960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
961		623
962	if (cnt <= 0)	624	SvREADONLY_off (sv);
963	{	625	SvCUR_set (sv, 0);
964	if (cnt && !res) res = -1;	626	SvLEN_set (sv, 0);
965	break;	627	SvPVX (sv) = 0;
966	}	628	SvOK_off (sv);
967		629
968	cnt = write (ofd, aio_buf, cnt);
969
970	if (cnt <= 0)
971	{
972	if (cnt && !res) res = -1;
973	break;
974	}
975
976	offset += cnt;
977	res += cnt;
978	count -= cnt;
979	}
980	}
981
982	return res;	630	return 0;
983	}	631	}
984		632
985	/* read a full directory */	633	static MGVTBL mmap_vtbl = {
986	static void scandir_ (aio_req req, worker *self)	634	0, 0, 0, 0, mmap_free
987	{	635	};
988	DIR *dirp;
989	union
990	{
991	struct dirent d;
992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
993	} *u;
994	struct dirent *entp;
995	char *name, *names;
996	int memlen = 4096;
997	int memofs = 0;
998	int res = 0;
999	int errorno;
1000
1001	LOCK (wrklock);
1002	self->dirp = dirp = opendir (req->ptr1);
1003	self->dbuf = u = malloc (sizeof (*u));
1004	req->flags |= FLAG_PTR2_FREE;
1005	req->ptr2 = names = malloc (memlen);
1006	UNLOCK (wrklock);
1007
1008	if (dirp && u && names)
1009	for (;;)
1010	{
1011	errno = 0;
1012	readdir_r (dirp, &u->d, &entp);
1013
1014	if (!entp)
1015	break;
1016
1017	name = entp->d_name;
1018
1019	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1020	{
1021	int len = strlen (name) + 1;
1022
1023	res++;
1024
1025	while (memofs + len > memlen)
1026	{
1027	memlen *= 2;
1028	LOCK (wrklock);
1029	req->ptr2 = names = realloc (names, memlen);
1030	UNLOCK (wrklock);
1031
1032	if (!names)
1033	break;
1034	}
1035
1036	memcpy (names + memofs, name, len);
1037	memofs += len;
1038	}
1039	}
1040
1041	if (errno)
1042	res = -1;
1043
1044	req->result = res;
1045	}
1046		636
1047	/*****************************************************************************/	637	/*****************************************************************************/
1048		638
1049	static void *aio_proc (void *thr_arg)	639	static SV *
		640	get_cb (SV *cb_sv)
1050	{	641	{
1051	aio_req req;	642	SvGETMAGIC (cb_sv);
1052	struct timespec ts;	643	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1053	worker *self = (worker *)thr_arg;
1054
1055	/* try to distribute timeouts somewhat evenly */
1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1057	* (1000000000UL / 1024UL);
1058
1059	for (;;)
1060	{
1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1062
1063	LOCK (reqlock);
1064
1065	for (;;)
1066	{
1067	self->req = req = reqq_shift (&req_queue);
1068
1069	if (req)
1070	break;
1071
1072	++idle;
1073
1074	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1075	== ETIMEDOUT)
1076	{
1077	if (idle > max_idle)
1078	{
1079	--idle;
1080	UNLOCK (reqlock);
1081	LOCK (wrklock);
1082	--started;
1083	UNLOCK (wrklock);
1084	goto quit;
1085	}
1086
1087	/* we are allowed to idle, so do so without any timeout */
1088	COND_WAIT (reqwait, reqlock);
1089	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1090	}
1091
1092	--idle;
1093	}
1094
1095	--nready;
1096
1097	UNLOCK (reqlock);
1098
1099	errno = 0; /* strictly unnecessary */
1100
1101	if (!(req->flags & FLAG_CANCELLED))
1102	switch (req->type)
1103	{
1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1106
1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1109
1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1113
1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1115	case REQ_CLOSE: req->result = close (req->int1); break;
1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
1127	case REQ_READDIR: scandir_ (req, self); break;
1128
1129	case REQ_BUSY:
1130	{
1131	struct timeval tv;
1132
1133	tv.tv_sec = req->int1;
1134	tv.tv_usec = req->int2;
1135
1136	req->result = select (0, 0, 0, 0, &tv);
1137	}
1138
1139	case REQ_GROUP:
1140	case REQ_NOP:
1141	break;
1142
1143	case REQ_QUIT:
1144	goto quit;
1145
1146	default:
1147	req->result = ENOSYS;
1148	break;
1149	}
1150
1151	req->errorno = errno;
1152
1153	LOCK (reslock);
1154
1155	++npending;
1156
1157	if (!reqq_push (&res_queue, req))
1158	{
1159	/* write a dummy byte to the pipe so fh becomes ready */
1160	write (respipe [1], &respipe, 1);
1161
1162	/* optionally signal the main thread asynchronously */
1163	if (main_sig)
1164	pthread_kill (main_tid, main_sig);
1165	}
1166
1167	self->req = 0;
1168	worker_clear (self);
1169
1170	UNLOCK (reslock);
1171	}
1172
1173	quit:
1174	LOCK (wrklock);
1175	worker_free (self);
1176	UNLOCK (wrklock);
1177
1178	return 0;
1179	}
1180
1181	/*****************************************************************************/
1182
1183	static void atfork_prepare (void)
1184	{
1185	LOCK (wrklock);
1186	LOCK (reqlock);
1187	LOCK (reslock);
1188	#if !HAVE_PREADWRITE
1189	LOCK (preadwritelock);
1190	#endif
1191	#if !HAVE_READDIR_R
1192	LOCK (readdirlock);
1193	#endif
1194	}
1195
1196	static void atfork_parent (void)
1197	{
1198	#if !HAVE_READDIR_R
1199	UNLOCK (readdirlock);
1200	#endif
1201	#if !HAVE_PREADWRITE
1202	UNLOCK (preadwritelock);
1203	#endif
1204	UNLOCK (reslock);
1205	UNLOCK (reqlock);
1206	UNLOCK (wrklock);
1207	}
1208
1209	static void atfork_child (void)
1210	{
1211	aio_req prv;
1212
1213	while (prv = reqq_shift (&req_queue))
1214	req_free (prv);
1215
1216	while (prv = reqq_shift (&res_queue))
1217	req_free (prv);
1218
1219	while (wrk_first.next != &wrk_first)
1220	{
1221	worker *wrk = wrk_first.next;
1222
1223	if (wrk->req)
1224	req_free (wrk->req);
1225
1226	worker_clear (wrk);
1227	worker_free (wrk);
1228	}
1229
1230	started = 0;
1231	idle = 0;
1232	nreqs = 0;
1233	nready = 0;
1234	npending = 0;
1235
1236	close (respipe [0]);
1237	close (respipe [1]);
1238	create_pipe ();
1239
1240	atfork_parent ();
1241	}	644	}
1242		645
1243	#define dREQ \	646	#define dREQ \
		647	SV *cb_cv; \
1244	aio_req req; \	648	aio_req req; \
1245	int req_pri = next_pri; \	649	int req_pri = next_pri; \
1246	next_pri = DEFAULT_PRI + PRI_BIAS; \	650	next_pri = EIO_PRI_DEFAULT; \
1247	\	651	\
1248	if (SvOK (callback) && !SvROK (callback)) \	652	cb_cv = get_cb (callback); \
1249	croak ("callback must be undef or of reference type"); \
1250	\	653	\
1251	Newz (0, req, 1, aio_cb); \	654	Newz (0, req, 1, eio_req); \
1252	if (!req) \	655	if (!req) \
1253	croak ("out of memory during aio_req allocation"); \	656	croak ("out of memory during eio_req allocation"); \
1254	\	657	\
1255	req->callback = newSVsv (callback); \	658	req->callback = SvREFCNT_inc (cb_cv); \
1256	req->pri = req_pri	659	req->pri = req_pri
1257		660
1258	#define REQ_SEND \	661	#define REQ_SEND \
		662	PUTBACK; \
1259	req_send (req); \	663	req_submit (req); \
		664	SPAGAIN; \
1260	\	665	\
1261	if (GIMME_V != G_VOID) \	666	if (GIMME_V != G_VOID) \
1262	XPUSHs (req_sv (req, AIO_REQ_KLASS));	667	XPUSHs (req_sv (req, aio_req_stash));
1263		668
1264	MODULE = IO::AIO PACKAGE = IO::AIO	669	MODULE = IO::AIO PACKAGE = IO::AIO
1265		670
1266	PROTOTYPES: ENABLE	671	PROTOTYPES: ENABLE
1267		672
1268	BOOT:	673	BOOT:
1269	{	674	{
		675	static const struct {
		676	const char *name;
		677	IV iv;
		678	} *civ, const_iv[] = {
		679	# define const_niv(name, value) { # name, (IV) value },
		680	# define const_iv(name) { # name, (IV) name },
		681	# define const_eio(name) { # name, (IV) EIO_ ## name },
		682	const_iv (EXDEV)
		683	const_iv (ENOSYS)
		684	const_iv (O_RDONLY)
		685	const_iv (O_WRONLY)
		686	const_iv (O_RDWR)
		687	const_iv (O_CREAT)
		688	const_iv (O_TRUNC)
		689	const_iv (O_EXCL)
		690	const_iv (O_APPEND)
		691	#ifndef _WIN32
		692	const_iv (S_IFIFO)
		693	#endif
		694	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		695	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		696	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		697	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		698	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		699	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		700
		701	const_iv (ST_RDONLY)
		702	const_iv (ST_NOSUID)
		703	const_iv (ST_NODEV)
		704	const_iv (ST_NOEXEC)
		705	const_iv (ST_SYNCHRONOUS)
		706	const_iv (ST_MANDLOCK)
		707	const_iv (ST_WRITE)
		708	const_iv (ST_APPEND)
		709	const_iv (ST_IMMUTABLE)
		710	const_iv (ST_NOATIME)
		711	const_iv (ST_NODIRATIME)
		712	const_iv (ST_RELATIME)
		713
		714	const_iv (PROT_EXEC)
		715	const_iv (PROT_NONE)
		716	const_iv (PROT_READ)
		717	const_iv (PROT_WRITE)
		718
		719	/*const_iv (MAP_FIXED)*/
		720	const_iv (MAP_PRIVATE)
		721	const_iv (MAP_SHARED)
		722	const_iv (MAP_ANONYMOUS)
		723
		724	/* linuxish */
		725	const_iv (MAP_HUGETLB)
		726	const_iv (MAP_LOCKED)
		727	const_iv (MAP_NORESERVE)
		728	const_iv (MAP_POPULATE)
		729	const_iv (MAP_NONBLOCK)
		730
		731	const_iv (MCL_FUTURE)
		732	const_iv (MCL_CURRENT)
		733
		734	const_eio (MS_ASYNC)
		735	const_eio (MS_INVALIDATE)
		736	const_eio (MS_SYNC)
		737
		738	const_eio (MT_MODIFY)
		739
		740	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		741	const_eio (SYNC_FILE_RANGE_WRITE)
		742	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		743
		744	const_eio (READDIR_DENTS)
		745	const_eio (READDIR_DIRS_FIRST)
		746	const_eio (READDIR_STAT_ORDER)
		747	const_eio (READDIR_FOUND_UNKNOWN)
		748
		749	const_eio (DT_UNKNOWN)
		750	const_eio (DT_FIFO)
		751	const_eio (DT_CHR)
		752	const_eio (DT_DIR)
		753	const_eio (DT_BLK)
		754	const_eio (DT_REG)
		755	const_eio (DT_LNK)
		756	const_eio (DT_SOCK)
		757	const_eio (DT_WHT)
		758	};
		759
1270	HV *stash = gv_stashpv ("IO::AIO", 1);	760	aio_stash = gv_stashpv ("IO::AIO" , 1);
		761	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		762	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1271		763
1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	764	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	765	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1279		766
		767	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		768
1280	create_pipe ();	769	create_respipe ();
1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);	770
		771	if (eio_init (want_poll, done_poll) < 0)
		772	croak ("IO::AIO: unable to initialise eio library");
		773
		774	/* atfork child called in fifo order, so before eio's handler */
		775	X_THREAD_ATFORK (0, 0, atfork_child);
1282	}	776	}
1283		777
1284	void	778	void
1285	max_poll_reqs (int nreqs)	779	max_poll_reqs (int nreqs)
1286	PROTOTYPE: $	780	PROTOTYPE: $
1287	CODE:	781	CODE:
1288	max_poll_reqs = nreqs;	782	eio_set_max_poll_reqs (nreqs);
1289		783
1290	void	784	void
1291	max_poll_time (double nseconds)	785	max_poll_time (double nseconds)
1292	PROTOTYPE: $	786	PROTOTYPE: $
1293	CODE:	787	CODE:
1294	max_poll_time = nseconds * AIO_TICKS;	788	eio_set_max_poll_time (nseconds);
1295		789
1296	void	790	void
1297	min_parallel (int nthreads)	791	min_parallel (int nthreads)
1298	PROTOTYPE: $	792	PROTOTYPE: $
		793	CODE:
		794	eio_set_min_parallel (nthreads);
1299		795
1300	void	796	void
1301	max_parallel (int nthreads)	797	max_parallel (int nthreads)
1302	PROTOTYPE: $	798	PROTOTYPE: $
		799	CODE:
		800	eio_set_max_parallel (nthreads);
1303		801
1304	void	802	void
1305	max_idle (int nthreads)	803	max_idle (int nthreads)
1306	PROTOTYPE: $	804	PROTOTYPE: $
1307	CODE:	805	CODE:
1308	set_max_idle (nthreads);	806	eio_set_max_idle (nthreads);
1309		807
1310	int	808	void
1311	max_outstanding (int maxreqs)	809	max_outstanding (int maxreqs)
1312	PROTOTYPE: $	810	PROTOTYPE: $
1313	CODE:	811	CODE:
1314	RETVAL = max_outstanding;
1315	max_outstanding = maxreqs;	812	max_outstanding = maxreqs;
1316	OUTPUT:
1317	RETVAL
1318		813
1319	void	814	void
1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	815	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1321	SV8 * pathname
1322	int flags
1323	int mode
1324	SV * callback
1325	PROTOTYPE: $$$;$	816	PROTOTYPE: $$$;$
1326	PPCODE:	817	PPCODE:
1327	{	818	{
1328	dREQ;	819	dREQ;
1329		820
1330	req->type = REQ_OPEN;	821	req->type = EIO_OPEN;
1331	req->sv1 = newSVsv (pathname);	822	req->sv1 = newSVsv (pathname);
1332	req->ptr1 = SvPVbyte_nolen (req->sv1);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1333	req->int1 = flags;	824	req->int1 = flags;
1334	req->mode = mode;	825	req->int2 = mode;
1335		826
1336	REQ_SEND;	827	REQ_SEND;
1337	}	828	}
1338		829
1339	void	830	void
1340	aio_close (fh,callback=&PL_sv_undef)	831	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1341	SV * fh
1342	SV * callback
1343	PROTOTYPE: $;$	832	PROTOTYPE: $;$
1344	ALIAS:	833	ALIAS:
1345	aio_close = REQ_CLOSE
1346	aio_fsync = REQ_FSYNC	834	aio_fsync = EIO_FSYNC
1347	aio_fdatasync = REQ_FDATASYNC	835	aio_fdatasync = EIO_FDATASYNC
1348	PPCODE:	836	PPCODE:
1349	{	837	{
		838	int fd = s_fileno_croak (fh, 0);
1350	dREQ;	839	dREQ;
1351		840
1352	req->type = ix;	841	req->type = ix;
1353	req->fh = newSVsv (fh);	842	req->sv1 = newSVsv (fh);
1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	843	req->int1 = fd;
1355		844
1356	REQ_SEND (req);	845	REQ_SEND (req);
1357	}	846	}
1358		847
1359	void	848	void
		849	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		850	PROTOTYPE: $$$$;$
		851	PPCODE:
		852	{
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	req->type = EIO_SYNC_FILE_RANGE;
		857	req->sv1 = newSVsv (fh);
		858	req->int1 = fd;
		859	req->offs = offset;
		860	req->size = nbytes;
		861	req->int2 = flags;
		862
		863	REQ_SEND (req);
		864	}
		865
		866	void
		867	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		868	PROTOTYPE: $;$
		869	PPCODE:
		870	{
		871	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		872	int fd = s_fileno_croak (fh, 0);
		873	dREQ;
		874
		875	if (close_pipe < 0)
		876	{
		877	int pipefd [2];
		878
		879	if (pipe (pipefd) < 0
		880	|| close (pipefd [1]) < 0
		881	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		882	abort (); /*D*/
		883
		884	close_pipe = pipefd [0];
		885	}
		886
		887	req->type = EIO_DUP2;
		888	req->int1 = close_pipe;
		889	req->sv2 = newSVsv (fh);
		890	req->int2 = fd;
		891
		892	REQ_SEND (req);
		893	}
		894
		895	void
1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	896	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1361	SV * fh
1362	UV offset
1363	UV length
1364	SV8 * data
1365	UV dataoffset
1366	SV * callback
1367	ALIAS:	897	ALIAS:
1368	aio_read = REQ_READ	898	aio_read = EIO_READ
1369	aio_write = REQ_WRITE	899	aio_write = EIO_WRITE
1370	PROTOTYPE: $$$$$;$	900	PROTOTYPE: $$$$$;$
1371	PPCODE:	901	PPCODE:
1372	{	902	{
1373	STRLEN svlen;	903	STRLEN svlen;
		904	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1374	char *svptr = SvPVbyte (data, svlen);	905	char *svptr = SvPVbyte (data, svlen);
1375		906	UV len = SvUV (length);
1376	SvUPGRADE (data, SVt_PV);
1377	SvPOK_on (data);
1378		907
1379	if (dataoffset < 0)	908	if (dataoffset < 0)
1380	dataoffset += svlen;	909	dataoffset += svlen;
1381		910
1382	if (dataoffset < 0 || dataoffset > svlen)	911	if (dataoffset < 0 || dataoffset > svlen)
1383	croak ("data offset outside of string");	912	croak ("dataoffset outside of data scalar");
1384		913
1385	if (ix == REQ_WRITE)	914	if (ix == EIO_WRITE)
1386	{	915	{
1387	/* write: check length and adjust. */	916	/* write: check length and adjust. */
1388	if (length < 0 || length + dataoffset > svlen)	917	if (!SvOK (length) || len + dataoffset > svlen)
1389	length = svlen - dataoffset;	918	len = svlen - dataoffset;
1390	}	919	}
1391	else	920	else
1392	{	921	{
1393	/* read: grow scalar as necessary */	922	/* read: check type and grow scalar as necessary */
		923	SvUPGRADE (data, SVt_PV);
1394	svptr = SvGROW (data, length + dataoffset + 1);	924	svptr = SvGROW (data, len + dataoffset + 1);
1395	}	925	}
1396
1397	if (length < 0)
1398	croak ("length must not be negative");
1399		926
1400	{	927	{
1401	dREQ;	928	dREQ;
1402		929
1403	req->type = ix;	930	req->type = ix;
1404	req->fh = newSVsv (fh);	931	req->sv1 = newSVsv (fh);
1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	932	req->int1 = fd;
1406	: IoOFP (sv_2io (fh)));	933	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1407	req->offs = offset;
1408	req->size = length;	934	req->size = len;
1409	req->sv1 = SvREFCNT_inc (data);	935	req->sv2 = SvREFCNT_inc (data);
1410	req->ptr1 = (char *)svptr + dataoffset;	936	req->ptr2 = (char *)svptr + dataoffset;
1411	req->stroffset = dataoffset;	937	req->stroffset = dataoffset;
1412		938
1413	if (!SvREADONLY (data))	939	if (!SvREADONLY (data))
1414	{	940	{
1415	SvREADONLY_on (data);	941	SvREADONLY_on (data);
1416	req->flags |= FLAG_SV1_RO_OFF;	942	req->flags |= FLAG_SV2_RO_OFF;
1417	}	943	}
1418		944
1419	REQ_SEND;	945	REQ_SEND;
1420	}	946	}
1421	}	947	}
1422		948
1423	void	949	void
1424	aio_readlink (path,callback=&PL_sv_undef)	950	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1425	SV8 * path
1426	SV * callback
1427	PROTOTYPE: $$;$	951	PROTOTYPE: $$;$
1428	PPCODE:	952	PPCODE:
1429	{	953	{
1430	SV *data;	954	SV *data;
1431	dREQ;	955	dREQ;
1432		956
1433	data = newSV (NAME_MAX);
1434	SvPOK_on (data);
1435
1436	req->type = REQ_READLINK;	957	req->type = EIO_READLINK;
1437	req->fh = newSVsv (path);	958	req->sv1 = newSVsv (path);
1438	req->ptr2 = SvPVbyte_nolen (req->fh);	959	req->ptr1 = SvPVbyte_nolen (req->sv1);
1439	req->sv1 = data;
1440	req->ptr1 = SvPVbyte_nolen (data);
1441		960
1442	REQ_SEND;	961	REQ_SEND;
1443	}	962	}
1444		963
1445	void	964	void
1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	965	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1447	SV * out_fh
1448	SV * in_fh
1449	UV in_offset
1450	UV length
1451	SV * callback
1452	PROTOTYPE: $$$$;$	966	PROTOTYPE: $$$$;$
1453	PPCODE:	967	PPCODE:
1454	{	968	{
		969	int ifd = s_fileno_croak (in_fh , 0);
		970	int ofd = s_fileno_croak (out_fh, 1);
1455	dREQ;	971	dREQ;
1456		972
1457	req->type = REQ_SENDFILE;	973	req->type = EIO_SENDFILE;
1458	req->fh = newSVsv (out_fh);	974	req->sv1 = newSVsv (out_fh);
1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	975	req->int1 = ofd;
1460	req->sv2 = newSVsv (in_fh);	976	req->sv2 = newSVsv (in_fh);
1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	977	req->int2 = ifd;
1462	req->offs = in_offset;	978	req->offs = in_offset;
1463	req->size = length;	979	req->size = length;
1464		980
1465	REQ_SEND;	981	REQ_SEND;
1466	}	982	}
1467		983
1468	void	984	void
1469	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	985	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1470	SV * fh
1471	UV offset
1472	IV length
1473	SV * callback
1474	PROTOTYPE: $$$;$	986	PROTOTYPE: $$$;$
1475	PPCODE:	987	PPCODE:
1476	{	988	{
		989	int fd = s_fileno_croak (fh, 0);
1477	dREQ;	990	dREQ;
1478		991
1479	req->type = REQ_READAHEAD;	992	req->type = EIO_READAHEAD;
1480	req->fh = newSVsv (fh);	993	req->sv1 = newSVsv (fh);
1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	994	req->int1 = fd;
1482	req->offs = offset;	995	req->offs = offset;
1483	req->size = length;	996	req->size = length;
1484		997
1485	REQ_SEND;	998	REQ_SEND;
1486	}	999	}
1487		1000
1488	void	1001	void
1489	aio_stat (fh_or_path,callback=&PL_sv_undef)	1002	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1490	SV8 * fh_or_path
1491	SV * callback
1492	ALIAS:	1003	ALIAS:
1493	aio_stat = REQ_STAT	1004	aio_stat = EIO_STAT
1494	aio_lstat = REQ_LSTAT	1005	aio_lstat = EIO_LSTAT
		1006	aio_statvfs = EIO_STATVFS
1495	PPCODE:	1007	PPCODE:
1496	{	1008	{
1497	dREQ;	1009	dREQ;
1498		1010
1499	req->ptr2 = malloc (sizeof (Stat_t));	1011	req->sv1 = newSVsv (fh_or_path);
1500	if (!req->ptr2)
1501	{
1502	req_free (req);
1503	croak ("out of memory during aio_stat statdata allocation");
1504	}
1505		1012
1506	req->flags |= FLAG_PTR2_FREE;	1013	if (SvPOK (req->sv1))
1507
1508	if (SvPOK (fh_or_path))
1509	{	1014	{
1510	req->type = ix;	1015	req->type = ix;
1511	req->sv1 = newSVsv (fh_or_path);
1512	req->ptr1 = SvPVbyte_nolen (req->sv1);	1016	req->ptr1 = SvPVbyte_nolen (req->sv1);
1513	}	1017	}
1514	else	1018	else
1515	{	1019	{
1516	req->type = REQ_FSTAT;	1020	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1517	req->fh = newSVsv (fh_or_path);
1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1021	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1519	}	1022	}
1520		1023
1521	REQ_SEND;	1024	REQ_SEND;
1522	}	1025	}
1523		1026
1524	void	1027	void
		1028	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1034	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1035	req->sv1 = newSVsv (fh_or_path);
		1036
		1037	if (SvPOK (req->sv1))
		1038	{
		1039	req->type = EIO_UTIME;
		1040	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1041	}
		1042	else
		1043	{
		1044	req->type = EIO_FUTIME;
		1045	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1046	}
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1053	PPCODE:
		1054	{
		1055	dREQ;
		1056
		1057	req->sv1 = newSVsv (fh_or_path);
		1058	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1059
		1060	if (SvPOK (req->sv1))
		1061	{
		1062	req->type = EIO_TRUNCATE;
		1063	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1064	}
		1065	else
		1066	{
		1067	req->type = EIO_FTRUNCATE;
		1068	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1069	}
		1070
		1071	REQ_SEND;
		1072	}
		1073
		1074	void
		1075	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1076	ALIAS:
		1077	aio_chmod = EIO_CHMOD
		1078	aio_mkdir = EIO_MKDIR
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->int2 = mode;
		1084	req->sv1 = newSVsv (fh_or_path);
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = ix;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FCHMOD;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	dREQ;
		1105
		1106	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1107	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1108	req->sv1 = newSVsv (fh_or_path);
		1109
		1110	if (SvPOK (req->sv1))
		1111	{
		1112	req->type = EIO_CHOWN;
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	}
		1115	else
		1116	{
		1117	req->type = EIO_FCHOWN;
		1118	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1119	}
		1120
		1121	REQ_SEND;
		1122	}
		1123
		1124	void
		1125	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_READDIR;
		1131	req->sv1 = newSVsv (pathname);
		1132	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1133	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1134
		1135	if (flags & EIO_READDIR_DENTS)
		1136	req->int1 |= EIO_READDIR_CUSTOM2;
		1137
		1138	REQ_SEND;
		1139	}
		1140
		1141	void
1525	aio_unlink (pathname,callback=&PL_sv_undef)	1142	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1526	SV8 * pathname
1527	SV * callback
1528	ALIAS:	1143	ALIAS:
1529	aio_unlink = REQ_UNLINK	1144	aio_unlink = EIO_UNLINK
1530	aio_rmdir = REQ_RMDIR	1145	aio_rmdir = EIO_RMDIR
1531	aio_readdir = REQ_READDIR	1146	aio_readdir = EIO_READDIR
1532	PPCODE:	1147	PPCODE:
1533	{	1148	{
1534	dREQ;	1149	dREQ;
1535		1150
1536	req->type = ix;	1151	req->type = ix;
…		…
1539		1154
1540	REQ_SEND;	1155	REQ_SEND;
1541	}	1156	}
1542		1157
1543	void	1158	void
1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
1545	SV8 * pathname
1546	UV mode
1547	SV * callback
1548	PPCODE:
1549	{
1550	dREQ;
1551
1552	req->type = REQ_MKDIR;
1553	req->sv1 = newSVsv (pathname);
1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
1555	req->mode = mode;
1556
1557	REQ_SEND;
1558	}
1559
1560	void
1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1159	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1562	SV8 * oldpath
1563	SV8 * newpath
1564	SV * callback
1565	ALIAS:	1160	ALIAS:
1566	aio_link = REQ_LINK	1161	aio_link = EIO_LINK
1567	aio_symlink = REQ_SYMLINK	1162	aio_symlink = EIO_SYMLINK
1568	aio_rename = REQ_RENAME	1163	aio_rename = EIO_RENAME
1569	PPCODE:	1164	PPCODE:
1570	{	1165	{
1571	dREQ;	1166	dREQ;
1572		1167
1573	req->type = ix;	1168	req->type = ix;
1574	req->fh = newSVsv (oldpath);	1169	req->sv1 = newSVsv (oldpath);
1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1576	req->sv1 = newSVsv (newpath);
1577	req->ptr1 = SvPVbyte_nolen (req->sv1);	1170	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1171	req->sv2 = newSVsv (newpath);
		1172	req->ptr2 = SvPVbyte_nolen (req->sv2);
1578		1173
1579	REQ_SEND;	1174	REQ_SEND;
1580	}	1175	}
1581		1176
1582	void	1177	void
1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1178	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1584	SV8 * pathname
1585	UV mode
1586	UV dev
1587	SV * callback
1588	PPCODE:	1179	PPCODE:
1589	{	1180	{
1590	dREQ;	1181	dREQ;
1591		1182
1592	req->type = REQ_MKNOD;	1183	req->type = EIO_MKNOD;
1593	req->sv1 = newSVsv (pathname);	1184	req->sv1 = newSVsv (pathname);
1594	req->ptr1 = SvPVbyte_nolen (req->sv1);	1185	req->ptr1 = SvPVbyte_nolen (req->sv1);
1595	req->mode = (mode_t)mode;	1186	req->int2 = (mode_t)mode;
1596	req->offs = dev;	1187	req->offs = dev;
1597		1188
1598	REQ_SEND;	1189	REQ_SEND;
1599	}	1190	}
1600		1191
1601	void	1192	void
		1193	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1194	ALIAS:
		1195	aio_mtouch = EIO_MTOUCH
		1196	aio_msync = EIO_MSYNC
		1197	PROTOTYPE: $$$$;$
		1198	PPCODE:
		1199	{
		1200	STRLEN svlen;
		1201	UV len = SvUV (length);
		1202	char *svptr = SvPVbyte (data, svlen);
		1203
		1204	if (offset < 0)
		1205	offset += svlen;
		1206
		1207	if (offset < 0 || offset > svlen)
		1208	croak ("offset outside of scalar");
		1209
		1210	if (!SvOK (length) || len + offset > svlen)
		1211	len = svlen - offset;
		1212
		1213	{
		1214	dREQ;
		1215
		1216	req->type = ix;
		1217	req->size = len;
		1218	req->sv2 = SvREFCNT_inc (data);
		1219	req->ptr2 = (char *)svptr + offset;
		1220	req->int1 = flags;
		1221
		1222	REQ_SEND;
		1223	}
		1224	}
		1225
		1226	void
1602	aio_busy (delay,callback=&PL_sv_undef)	1227	aio_busy (double delay, SV *callback=&PL_sv_undef)
1603	double delay
1604	SV * callback
1605	PPCODE:	1228	PPCODE:
1606	{	1229	{
1607	dREQ;	1230	dREQ;
1608		1231
1609	req->type = REQ_BUSY;	1232	req->type = EIO_BUSY;
1610	req->int1 = delay < 0. ? 0 : delay;	1233	req->nv1 = delay < 0. ? 0. : delay;
1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1612		1234
1613	REQ_SEND;	1235	REQ_SEND;
1614	}	1236	}
1615		1237
1616	void	1238	void
1617	aio_group (callback=&PL_sv_undef)	1239	aio_group (SV *callback=&PL_sv_undef)
1618	SV * callback
1619	PROTOTYPE: ;$	1240	PROTOTYPE: ;$
1620	PPCODE:	1241	PPCODE:
1621	{	1242	{
1622	dREQ;	1243	dREQ;
1623		1244
1624	req->type = REQ_GROUP;	1245	req->type = EIO_GROUP;
1625		1246
1626	req_send (req);	1247	req_submit (req);
1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1248	XPUSHs (req_sv (req, aio_grp_stash));
1628	}	1249	}
1629		1250
1630	void	1251	void
1631	aio_nop (callback=&PL_sv_undef)	1252	aio_nop (SV *callback=&PL_sv_undef)
1632	SV * callback	1253	ALIAS:
		1254	aio_nop = EIO_NOP
		1255	aio_sync = EIO_SYNC
1633	PPCODE:	1256	PPCODE:
1634	{	1257	{
1635	dREQ;	1258	dREQ;
1636		1259
1637	req->type = REQ_NOP;	1260	req->type = ix;
1638		1261
1639	REQ_SEND;	1262	REQ_SEND;
1640	}	1263	}
1641		1264
1642	int	1265	int
1643	aioreq_pri (int pri = 0)	1266	aioreq_pri (int pri = 0)
1644	PROTOTYPE: ;$	1267	PROTOTYPE: ;$
1645	CODE:	1268	CODE:
1646	RETVAL = next_pri - PRI_BIAS;	1269	RETVAL = next_pri;
1647	if (items > 0)	1270	if (items > 0)
1648	{	1271	{
1649	if (pri < PRI_MIN) pri = PRI_MIN;	1272	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1650	if (pri > PRI_MAX) pri = PRI_MAX;	1273	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1651	next_pri = pri + PRI_BIAS;	1274	next_pri = pri;
1652	}	1275	}
1653	OUTPUT:	1276	OUTPUT:
1654	RETVAL	1277	RETVAL
1655		1278
1656	void	1279	void
1657	aioreq_nice (int nice = 0)	1280	aioreq_nice (int nice = 0)
1658	CODE:	1281	CODE:
1659	nice = next_pri - nice;	1282	nice = next_pri - nice;
1660	if (nice < PRI_MIN) nice = PRI_MIN;	1283	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1661	if (nice > PRI_MAX) nice = PRI_MAX;	1284	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1662	next_pri = nice + PRI_BIAS;	1285	next_pri = nice;
1663		1286
1664	void	1287	void
1665	flush ()	1288	flush ()
1666	PROTOTYPE:	1289	PROTOTYPE:
1667	CODE:	1290	CODE:
1668	while (nreqs)	1291	while (eio_nreqs ())
1669	{	1292	{
1670	poll_wait ();	1293	poll_wait ();
1671	poll_cb ();	1294	poll_cb ();
1672	}	1295	}
1673		1296
…		…
1682		1305
1683	int	1306	int
1684	poll_fileno()	1307	poll_fileno()
1685	PROTOTYPE:	1308	PROTOTYPE:
1686	CODE:	1309	CODE:
1687	RETVAL = respipe [0];	1310	RETVAL = s_epipe_fd (&respipe);
1688	OUTPUT:	1311	OUTPUT:
1689	RETVAL	1312	RETVAL
1690		1313
1691	int	1314	int
1692	poll_cb(...)	1315	poll_cb(...)
…		…
1700	poll_wait()	1323	poll_wait()
1701	PROTOTYPE:	1324	PROTOTYPE:
1702	CODE:	1325	CODE:
1703	poll_wait ();	1326	poll_wait ();
1704		1327
1705	void
1706	setsig (int signum = SIGIO)
1707	PROTOTYPE: ;$
1708	CODE:
1709	{
1710	if (block_sig_level)
1711	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1712
1713	LOCK (reslock);
1714	main_tid = pthread_self ();
1715	main_sig = signum;
1716	UNLOCK (reslock);
1717
1718	if (main_sig && npending)
1719	pthread_kill (main_tid, main_sig);
1720	}
1721
1722	void
1723	aio_block (SV *cb)
1724	PROTOTYPE: &
1725	PPCODE:
1726	{
1727	int count;
1728
1729	block_sig ();
1730	PUSHMARK (SP);
1731	PUTBACK;
1732	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1733	SPAGAIN;
1734	unblock_sig ();
1735
1736	if (SvTRUE (ERRSV))
1737	croak (0);
1738
1739	XSRETURN (count);
1740	}
1741
1742	int	1328	int
1743	nreqs()	1329	nreqs()
1744	PROTOTYPE:	1330	PROTOTYPE:
1745	CODE:	1331	CODE:
1746	RETVAL = nreqs;	1332	RETVAL = eio_nreqs ();
1747	OUTPUT:	1333	OUTPUT:
1748	RETVAL	1334	RETVAL
1749		1335
1750	int	1336	int
1751	nready()	1337	nready()
1752	PROTOTYPE:	1338	PROTOTYPE:
1753	CODE:	1339	CODE:
1754	RETVAL = get_nready ();	1340	RETVAL = eio_nready ();
1755	OUTPUT:	1341	OUTPUT:
1756	RETVAL	1342	RETVAL
1757		1343
1758	int	1344	int
1759	npending()	1345	npending()
1760	PROTOTYPE:	1346	PROTOTYPE:
1761	CODE:	1347	CODE:
1762	RETVAL = get_npending ();	1348	RETVAL = eio_npending ();
1763	OUTPUT:	1349	OUTPUT:
1764	RETVAL	1350	RETVAL
1765		1351
1766	int	1352	int
1767	nthreads()	1353	nthreads()
1768	PROTOTYPE:	1354	PROTOTYPE:
1769	CODE:	1355	CODE:
1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1356	RETVAL = eio_nthreads ();
1771	RETVAL = started;
1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1773	OUTPUT:	1357	OUTPUT:
1774	RETVAL	1358	RETVAL
1775		1359
		1360	int
		1361	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1362	PROTOTYPE: $$$$
		1363	CODE:
		1364	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1365	RETVAL = posix_fadvise (fh, offset, length, advice);
		1366	#else
		1367	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1368	#endif
		1369	OUTPUT:
		1370	RETVAL
		1371
		1372	ssize_t
		1373	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1374	PROTOTYPE: $$$$
		1375	CODE:
		1376	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	void
		1381	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1382	PROTOTYPE: $$$$$;$
		1383	PPCODE:
		1384	sv_unmagic (scalar, MMAP_MAGIC);
		1385	{
		1386	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1387	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1388	if (addr == (void *)-1)
		1389	XSRETURN_NO;
		1390
		1391	/* we store the length in mg_obj, as namlen is I32 :/ */
		1392	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1393	->mg_obj = (SV *)length;
		1394
		1395	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1396	if (!(prot & PROT_WRITE))
		1397	SvREADONLY_on (scalar);
		1398
		1399	SvPVX (scalar) = (char *)addr;
		1400	SvCUR_set (scalar, length);
		1401	SvLEN_set (scalar, 0);
		1402	SvPOK_only (scalar);
		1403
		1404	XSRETURN_YES;
		1405	}
		1406
		1407	void
		1408	munmap (SV *scalar)
		1409	PROTOTYPE: $
		1410	CODE:
		1411	sv_unmagic (scalar, MMAP_MAGIC);
		1412
		1413	int
		1414	mlockall (int flags)
		1415	PROTOTYPE: $
		1416	CODE:
		1417	#if _POSIX_MEMLOCK
		1418	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1419	extern int mallopt (int, int);
		1420	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1421	#endif
		1422	mlockall (flags);
		1423	#else
		1424	RETVAL = -1;
		1425	errno = ENOSYS;
		1426	#endif
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	int
		1431	munlockall ()
		1432	PROTOTYPE:
		1433	CODE:
		1434	#if _POSIX_MEMLOCK
		1435	munlockall ();
		1436	#else
		1437	RETVAL = -1;
		1438	errno = ENOSYS;
		1439	#endif
		1440	OUTPUT:
		1441	RETVAL
		1442
		1443	void _on_next_submit (SV *cb)
		1444	CODE:
		1445	SvREFCNT_dec (on_next_submit);
		1446	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1447
1776	PROTOTYPES: DISABLE	1448	PROTOTYPES: DISABLE
1777		1449
1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1450	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1779		1451
1780	void	1452	void
1781	cancel (aio_req_ornot req)	1453	cancel (aio_req_ornot req)
1782	CODE:	1454	CODE:
1783	req_cancel (req);	1455	eio_cancel (req);
1784		1456
1785	void	1457	void
1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1458	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1787	CODE:	1459	PPCODE:
		1460	{
		1461	if (GIMME_V != G_VOID)
		1462	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1463
		1464	if (items > 1)
		1465	{
		1466	SV *cb_cv =get_cb (callback);
		1467
1788	SvREFCNT_dec (req->callback);	1468	SvREFCNT_dec (req->callback);
1789	req->callback = newSVsv (callback);	1469	req->callback = SvREFCNT_inc (cb_cv);
		1470	}
		1471	}
1790		1472
1791	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1792		1474
1793	void	1475	void
1794	add (aio_req grp, ...)	1476	add (aio_req grp, ...)
1795	PPCODE:	1477	PPCODE:
1796	{	1478	{
1797	int i;	1479	int i;
1798	aio_req req;
1799
1800	if (main_sig && !block_sig_level)
1801	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1802		1480
1803	if (grp->int1 == 2)	1481	if (grp->int1 == 2)
1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1482	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1805		1483
1806	for (i = 1; i < items; ++i )	1484	for (i = 1; i < items; ++i )
1807	{	1485	{
		1486	aio_req req;
		1487
1808	if (GIMME_V != G_VOID)	1488	if (GIMME_V != G_VOID)
1809	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1489	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1810		1490
1811	req = SvAIO_REQ (ST (i));	1491	req = SvAIO_REQ (ST (i));
1812		1492
1813	if (req)	1493	if (req)
1814	{	1494	eio_grp_add (grp, req);
1815	++grp->size;
1816	req->grp = grp;
1817
1818	req->grp_prev = 0;
1819	req->grp_next = grp->grp_first;
1820
1821	if (grp->grp_first)
1822	grp->grp_first->grp_prev = req;
1823
1824	grp->grp_first = req;
1825	}
1826	}	1495	}
1827	}	1496	}
1828		1497
1829	void	1498	void
1830	cancel_subs (aio_req_ornot req)	1499	cancel_subs (aio_req_ornot req)
…		…
1839	AV *av;	1508	AV *av;
1840		1509
1841	grp->errorno = errno;	1510	grp->errorno = errno;
1842		1511
1843	av = newAV ();	1512	av = newAV ();
		1513	av_extend (av, items - 1);
1844		1514
1845	for (i = 1; i < items; ++i )	1515	for (i = 1; i < items; ++i )
1846	av_push (av, newSVsv (ST (i)));	1516	av_push (av, newSVsv (ST (i)));
1847		1517
1848	SvREFCNT_dec (grp->sv1);	1518	SvREFCNT_dec (grp->sv1);
…		…
1855	grp->errorno = errorno;	1525	grp->errorno = errorno;
1856		1526
1857	void	1527	void
1858	limit (aio_req grp, int limit)	1528	limit (aio_req grp, int limit)
1859	CODE:	1529	CODE:
1860	grp->int2 = limit;	1530	eio_grp_limit (grp, limit);
1861	aio_grp_feed (grp);
1862		1531
1863	void	1532	void
1864	feed (aio_req grp, SV *callback=&PL_sv_undef)	1533	feed (aio_req grp, SV *callback=&PL_sv_undef)
1865	CODE:	1534	CODE:
1866	{	1535	{
1867	SvREFCNT_dec (grp->sv2);	1536	SvREFCNT_dec (grp->sv2);
1868	grp->sv2 = newSVsv (callback);	1537	grp->sv2 = newSVsv (callback);
		1538	grp->feed = aio_grp_feed;
1869		1539
1870	if (grp->int2 <= 0)	1540	if (grp->int2 <= 0)
1871	grp->int2 = 2;	1541	grp->int2 = 2;
1872		1542
1873	aio_grp_feed (grp);	1543	eio_grp_limit (grp, grp->int2);
1874	}	1544	}
1875		1545

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