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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.79 by root, Thu Oct 26 16:28:33 2006 UTC vs.
Revision 1.193 by root, Mon Jul 25 16:51:07 2011 UTC

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

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