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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC vs.
Revision 1.170 by root, Wed Aug 4 16:09:36 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
26	#include <limits.h>	17	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	18	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	19	#include <sched.h>
31		20
32	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>	22	# include <sys/mman.h>
35	# elif __freebsd	23	#endif
36	# 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
37	# include <sys/uio.h>	68	# include <sys/time.h>
38	# elif __hpux
39	# include <sys/socket.h>
40	# elif __solaris /* not yet */
41	# 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	#if _XOPEN_SOURCE < 600 || NO_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef ST_NODEV
		171	# define ST_NODEV 0
		172	#endif
		173	#ifndef ST_NOEXEC
		174	# define ST_NOEXEC 0
		175	#endif
		176	#ifndef ST_SYNCHRONOUS
		177	# define ST_SYNCHRONOUS 0
		178	#endif
		179	#ifndef ST_MANDLOCK
		180	# define ST_MANDLOCK 0
		181	#endif
		182	#ifndef ST_WRITE
		183	# define ST_WRITE 0
		184	#endif
		185	#ifndef ST_APPEND
		186	# define ST_APPEND 0
		187	#endif
		188	#ifndef ST_IMMUTABLE
		189	# define ST_IMMUTABLE 0
		190	#endif
		191	#ifndef ST_NOATIME
		192	# define ST_NOATIME 0
		193	#endif
		194	#ifndef ST_NODIRATIME
		195	# define ST_NODIRATIME 0
		196	#endif
		197	#ifndef ST_RELATIME
		198	# define ST_RELATIME 0
		199	#endif
		200
		201	#ifndef MCL_CURRENT
		202	# define MCL_CURRENT 0
		203	#endif
		204	#ifndef MCL_FUTURE
		205	# define MCL_FUTURE 0
		206	#endif
		207
		208	#ifndef MAP_ANONYMOUS
		209	# ifdef MAP_ANON
		210	# define MAP_ANONYMOUS MAP_ANON
42	# else	211	# else
43	# error sendfile support requested but not available	212	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	213	# endif
45	#endif	214	#endif
46		215	#ifndef MAP_HUGETLB
47	/* used for struct dirent, AIX doesn't provide it */	216	# define MAP_HUGETLB 0
48	#ifndef NAME_MAX
49	# define NAME_MAX 4096
50	#endif	217	#endif
51		218	#ifndef MAP_LOCKED
52	#ifndef PTHREAD_STACK_MIN	219	# define MAP_LOCKED 0
53	/* care for broken platforms, e.g. windows */
54	# define PTHREAD_STACK_MIN 16384
55	#endif	220	#endif
56		221	#ifndef MAP_NORESERVE
57	#if __ia64	222	# define MAP_NORESERVE 0
58	# define STACKSIZE 65536
59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
60	# define STACKSIZE PTHREAD_STACK_MIN
61	#else
62	# define STACKSIZE 16384
63	#endif	223	#endif
		224	#ifndef MAP_POPULATE
		225	# define MAP_POPULATE 0
		226	#endif
		227	#ifndef MAP_NONBLOCK
		228	# define MAP_NONBLOCK 0
		229	#endif
64		230
65	/* buffer size for various temporary buffers */	231	#ifndef PAGESIZE
66	#define AIO_BUFSIZE 65536	232	# define PAGESIZE sysconf (_SC_PAGESIZE)
		233	#endif
67		234
68	#define dBUF \	235	static int req_invoke (eio_req *req);
69	char *aio_buf; \	236	#define EIO_FINISH(req) req_invoke (req)
70	LOCK (wrklock); \	237	static void req_destroy (eio_req *grp);
71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	238	#define EIO_DESTROY(req) req_destroy (req)
72	UNLOCK (wrklock); \
73	if (!aio_buf) \
74	return -1;
75		239
76	enum {	240	enum {
77	REQ_QUIT,	241	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
78	REQ_OPEN, REQ_CLOSE,
79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
80	REQ_SENDFILE,
81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
82	REQ_FSYNC, REQ_FDATASYNC,
83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
84	REQ_READDIR,
85	REQ_LINK, REQ_SYMLINK,
86	REQ_GROUP, REQ_NOP,
87	REQ_BUSY,
88	};	242	};
89		243
90	#define AIO_REQ_KLASS "IO::AIO::REQ"	244	#include "libeio/eio.c"
91	#define AIO_GRP_KLASS "IO::AIO::GRP"
92		245
93	typedef struct aio_cb
94	{
95	struct aio_cb *volatile next;
96
97	SV *data, *callback;
98	SV *fh, *fh2;
99	void *dataptr, *data2ptr;
100	Stat_t *statdata;
101	off_t offset;
102	size_t length;
103	ssize_t result;
104
105	STRLEN dataoffset;
106	int type;
107	int fd, fd2;
108	int errorno;
109	mode_t mode; /* open */
110
111	unsigned char flags;
112	unsigned char pri;
113
114	SV *self; /* the perl counterpart of this request, if any */
115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
116	} aio_cb;
117
118	enum {
119	FLAG_CANCELLED = 0x01,
120	};
121
122	typedef aio_cb *aio_req;	246	typedef eio_req *aio_req;
123	typedef aio_cb *aio_req_ornot;	247	typedef eio_req *aio_req_ornot;
124		248
125	enum {	249	static SV *on_next_submit;
126	PRI_MIN = -4,	250	static int next_pri = EIO_PRI_DEFAULT;
127	PRI_MAX = 4,	251	static int max_outstanding;
128		252
129	DEFAULT_PRI = 0,	253	static s_epipe respipe;
130	PRI_BIAS = -PRI_MIN,
131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
132	};
133		254
134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
135
136	static int started, wanted;
137	static volatile int nreqs;
138	static int respipe [2];
139
140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
142	#else
143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
144	#endif
145
146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
148
149	/* worker threasd management */
150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
151
152	typedef struct worker {
153	/* locked by wrklock */
154	struct worker *prev, *next;
155
156	pthread_t tid;
157
158	/* locked by reslock, reqlock or wrklock */
159	aio_req req; /* currently processed request */
160	void *dbuf;
161	DIR *dirp;
162	} worker;
163
164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
165
166	static void worker_clear (worker *wrk)
167	{
168	if (wrk->dirp)
169	{
170	closedir (wrk->dirp);
171	wrk->dirp = 0;
172	}
173
174	if (wrk->dbuf)
175	{
176	free (wrk->dbuf);
177	wrk->dbuf = 0;
178	}
179	}
180
181	static void worker_free (worker *wrk)
182	{
183	wrk->next->prev = wrk->prev;
184	wrk->prev->next = wrk->next;
185
186	free (wrk);
187	}
188
189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
192
193	/*
194	* a somewhat faster data structure might be nice, but
195	* with 8 priorities this actually needs <20 insns
196	* per shift, the most expensive operation.
197	*/
198	typedef struct {
199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
200	int size;
201	} reqq;
202
203	static reqq req_queue;
204	static reqq res_queue;
205
206	int reqq_push (reqq *q, aio_req req)
207	{
208	int pri = req->pri;
209	req->next = 0;
210
211	if (q->qe[pri])
212	{
213	q->qe[pri]->next = req;
214	q->qe[pri] = req;
215	}
216	else
217	q->qe[pri] = q->qs[pri] = req;
218
219	return q->size++;
220	}
221
222	aio_req reqq_shift (reqq *q)
223	{
224	int pri;
225
226	if (!q->size)
227	return 0;
228
229	--q->size;
230
231	for (pri = NUM_PRI; pri--; )
232	{
233	aio_req req = q->qs[pri];
234
235	if (req)
236	{
237	if (!(q->qs[pri] = req->next))
238	q->qe[pri] = 0;
239
240	return req;
241	}
242	}
243
244	abort ();
245	}
246
247	static int poll_cb ();
248	static void req_invoke (aio_req req);
249	static void req_free (aio_req req);	255	static void req_destroy (aio_req req);
250	static void req_cancel (aio_req req);	256	static void req_cancel (aio_req req);
251		257
		258	static void want_poll (void)
		259	{
		260	/* write a dummy byte to the pipe so fh becomes ready */
		261	s_epipe_signal (&respipe);
		262	}
		263
		264	static void done_poll (void)
		265	{
		266	/* read any signals sent by the worker threads */
		267	s_epipe_drain (&respipe);
		268	}
		269
252	/* must be called at most once */	270	/* must be called at most once */
253	static SV *req_sv (aio_req req, const char *klass)	271	static SV *req_sv (aio_req req, HV *stash)
254	{	272	{
255	if (!req->self)	273	if (!req->self)
256	{	274	{
257	req->self = (SV *)newHV ();	275	req->self = (SV *)newHV ();
258	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	276	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
259	}	277	}
260		278
261	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	279	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
262	}	280	}
263		281
264	static aio_req SvAIO_REQ (SV *sv)	282	static aio_req SvAIO_REQ (SV *sv)
265	{	283	{
266	MAGIC *mg;	284	MAGIC *mg;
267		285
268	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	286	if (!SvROK (sv)
		287	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		288	&& SvSTASH (SvRV (sv)) != aio_req_stash
		289	&& !sv_derived_from (sv, "IO::AIO::REQ")))
269	croak ("object of class " AIO_REQ_KLASS " expected");	290	croak ("object of class IO::AIO::REQ expected");
270		291
271	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	292	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
272		293
273	return mg ? (aio_req)mg->mg_ptr : 0;	294	return mg ? (aio_req)mg->mg_ptr : 0;
274	}	295	}
275		296
276	static void aio_grp_feed (aio_req grp)	297	static void aio_grp_feed (aio_req grp)
277	{	298	{
278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	299	if (grp->sv2 && SvOK (grp->sv2))
279	{	300	{
280	int old_len = grp->length;
281
282	if (grp->fh2 && SvOK (grp->fh2))
283	{
284	dSP;	301	dSP;
285		302
286	ENTER;	303	ENTER;
287	SAVETMPS;	304	SAVETMPS;
288	PUSHMARK (SP);	305	PUSHMARK (SP);
289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	306	XPUSHs (req_sv (grp, aio_grp_stash));
290	PUTBACK;	307	PUTBACK;
291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	308	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
292	SPAGAIN;	309	SPAGAIN;
293	FREETMPS;	310	FREETMPS;
294	LEAVE;	311	LEAVE;
295	}
296
297	/* stop if no progress has been made */
298	if (old_len == grp->length)
299	{
300	SvREFCNT_dec (grp->fh2);
301	grp->fh2 = 0;
302	break;
303	}
304	}	312	}
305	}	313	}
306		314
307	static void aio_grp_dec (aio_req grp)	315	static void req_submit (eio_req *req)
308	{	316	{
309	--grp->length;	317	eio_submit (req);
310		318
311	/* call feeder, if applicable */	319	if (expect_false (on_next_submit))
312	aio_grp_feed (grp);
313
314	/* finish, if done */
315	if (!grp->length && grp->fd)
316	{	320	{
317	req_invoke (grp);	321	dSP;
318	req_free (grp);	322	SV *cb = sv_2mortal (on_next_submit);
		323
		324	on_next_submit = 0;
		325
		326	PUSHMARK (SP);
		327	PUTBACK;
		328	call_sv (cb, G_DISCARD | G_EVAL);
319	}	329	}
320	}	330	}
321		331
322	static void poll_wait ()	332	static int req_invoke (eio_req *req)
323	{	333	{
324	fd_set rfd;	334	if (req->flags & FLAG_SV2_RO_OFF)
		335	SvREADONLY_off (req->sv2);
325		336
326	while (nreqs)	337	if (!EIO_CANCELLED (req) && req->callback)
327	{	338	{
328	int size;
329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
330	LOCK (reslock);
331	#endif
332	size = res_queue.size;
333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
334	UNLOCK (reslock);
335	#endif
336
337	if (size)
338	return;
339
340	FD_ZERO(&rfd);
341	FD_SET(respipe [0], &rfd);
342
343	select (respipe [0] + 1, &rfd, 0, 0, 0);
344	}
345	}
346
347	static void req_invoke (aio_req req)
348	{
349	dSP;	339	dSP;
350		340	static SV *sv_result_cache; /* caches the result integer SV */
351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	341	SV *sv_result;
352	{
353	errno = req->errorno;
354		342
355	ENTER;	343	ENTER;
356	SAVETMPS;	344	SAVETMPS;
357	PUSHMARK (SP);	345	PUSHMARK (SP);
358	EXTEND (SP, 1);	346	EXTEND (SP, 1);
359		347
		348	/* do not recreate the result IV from scratch each time */
		349	if (expect_true (sv_result_cache))
		350	{
		351	sv_result = sv_result_cache; sv_result_cache = 0;
		352	SvIV_set (sv_result, req->result);
		353	}
		354	else
		355	{
		356	sv_result = newSViv (req->result);
		357	SvREADONLY_on (sv_result);
		358	}
		359
360	switch (req->type)	360	switch (req->type)
361	{	361	{
362	case REQ_READDIR:	362	case EIO_READDIR:
363	{	363	{
364	SV *rv = &PL_sv_undef;	364	SV *rv = &PL_sv_undef;
365		365
366	if (req->result >= 0)	366	if (req->result >= 0)
367	{	367	{
368	int i;	368	int i;
369	char *buf = req->data2ptr;	369	char *names = (char *)req->ptr2;
		370	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
370	AV *av = newAV ();	371	AV *av = newAV ();
371		372
372	av_extend (av, req->result - 1);	373	av_extend (av, req->result - 1);
373		374
374	for (i = 0; i < req->result; ++i)	375	for (i = 0; i < req->result; ++i)
375	{	376	{
376	SV *sv = newSVpv (buf, 0);	377	if (req->int1 & EIO_READDIR_DENTS)
		378	{
		379	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
377		380
		381	if (req->int1 & EIO_READDIR_CUSTOM2)
		382	{
		383	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		384	AV *avent = newAV ();
		385
		386	av_extend (avent, 2);
		387
		388	if (!sv_type [ent->type])
		389	{
		390	sv_type [ent->type] = newSViv (ent->type);
		391	SvREADONLY_on (sv_type [ent->type]);
		392	}
		393
		394	av_store (avent, 0, namesv);
		395	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		396	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		397
		398	av_store (av, i, newRV_noinc ((SV *)avent));
		399	}
		400	else
378	av_store (av, i, sv);	401	av_store (av, i, namesv);
		402
		403	++ent;
		404	}
		405	else
		406	{
		407	SV *name = newSVpv (names, 0);
		408	av_store (av, i, name);
379	buf += SvCUR (sv) + 1;	409	names += SvCUR (name) + 1;
		410	}
380	}	411	}
381		412
382	rv = sv_2mortal (newRV_noinc ((SV *)av));	413	rv = sv_2mortal (newRV_noinc ((SV *)av));
383	}	414	}
384		415
385	PUSHs (rv);	416	PUSHs (rv);
		417
		418	if (req->int1 & EIO_READDIR_CUSTOM1)
		419	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
386	}	420	}
387	break;	421	break;
388		422
389	case REQ_OPEN:	423	case EIO_OPEN:
390	{	424	{
391	/* convert fd to fh */	425	/* convert fd to fh */
392	SV *fh;	426	SV *fh = &PL_sv_undef;
393		427
394	PUSHs (sv_2mortal (newSViv (req->result)));	428	if (req->result >= 0)
395	PUTBACK;	429	{
396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	430	GV *gv = (GV *)sv_newmortal ();
397	SPAGAIN;	431	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		432	char sym [64];
		433	int symlen;
		434
		435	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		436	gv_init (gv, aio_stash, sym, symlen, 0);
398		437
399	fh = SvREFCNT_inc (POPs);	438	symlen = snprintf (
		439	sym,
		440	sizeof (sym),
		441	"%s&=%d",
		442	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		443	(int)req->result
		444	);
400		445
		446	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		447	fh = (SV *)gv;
		448	}
		449
401	PUSHMARK (SP);	450	PUSHs (fh);
402	XPUSHs (sv_2mortal (fh));
403	}	451	}
404	break;	452	break;
405		453
		454	case EIO_STATVFS:
		455	case EIO_FSTATVFS:
		456	{
		457	SV *rv = &PL_sv_undef;
		458
		459	if (req->result >= 0)
		460	{
		461	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		462	HV *hv = newHV ();
		463
		464	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		465
		466	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		467	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		468	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		469	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		470	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		471	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		472	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		473	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		474	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		475	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		476	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		477	}
		478
		479	PUSHs (rv);
		480	}
		481
		482	break;
		483
406	case REQ_GROUP:	484	case EIO_GROUP:
407	req->fd = 2; /* mark group as finished */	485	req->int1 = 2; /* mark group as finished */
408		486
409	if (req->data)	487	if (req->sv1)
410	{	488	{
411	int i;	489	int i;
412	AV *av = (AV *)req->data;	490	AV *av = (AV *)req->sv1;
413		491
414	EXTEND (SP, AvFILL (av) + 1);	492	EXTEND (SP, AvFILL (av) + 1);
415	for (i = 0; i <= AvFILL (av); ++i)	493	for (i = 0; i <= AvFILL (av); ++i)
416	PUSHs (*av_fetch (av, i, 0));	494	PUSHs (*av_fetch (av, i, 0));
417	}	495	}
418	break;	496	break;
419		497
420	case REQ_NOP:	498	case EIO_NOP:
421	case REQ_BUSY:	499	case EIO_BUSY:
422	break;	500	break;
423		501
		502	case EIO_READLINK:
		503	if (req->result > 0)
		504	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		505	break;
		506
		507	case EIO_STAT:
		508	case EIO_LSTAT:
		509	case EIO_FSTAT:
		510	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		511	PL_laststatval = req->result;
		512	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		513	PUSHs (sv_result);
		514	break;
		515
		516	case EIO_READ:
		517	{
		518	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		519	*SvEND (req->sv2) = 0;
		520	SvPOK_only (req->sv2);
		521	SvSETMAGIC (req->sv2);
		522	PUSHs (sv_result);
		523	}
		524	break;
		525
		526	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		527	if (req->result > 0)
		528	SvIV_set (sv_result, 0);
		529	/* FALLTHROUGH */
		530
424	default:	531	default:
425	PUSHs (sv_2mortal (newSViv (req->result)));	532	PUSHs (sv_result);
426	break;	533	break;
427	}	534	}
428		535
		536	errno = req->errorno;
429		537
430	PUTBACK;	538	PUTBACK;
431	call_sv (req->callback, G_VOID | G_EVAL);	539	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
432	SPAGAIN;	540	SPAGAIN;
		541
		542	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		543	SvREFCNT_dec (sv_result);
		544	else
		545	sv_result_cache = sv_result;
433		546
434	FREETMPS;	547	FREETMPS;
435	LEAVE;	548	LEAVE;
		549
		550	PUTBACK;
436	}	551	}
437		552
438	if (req->grp)	553	return !!SvTRUE (ERRSV);
439	{
440	aio_req grp = req->grp;
441
442	/* unlink request */
443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
445
446	if (grp->grp_first == req)
447	grp->grp_first = req->grp_next;
448
449	aio_grp_dec (grp);
450	}
451
452	if (SvTRUE (ERRSV))
453	{
454	req_free (req);
455	croak (0);
456	}
457	}	554	}
458		555
459	static void req_free (aio_req req)	556	static void req_destroy (aio_req req)
460	{	557	{
461	if (req->self)	558	if (req->self)
462	{	559	{
463	sv_unmagic (req->self, PERL_MAGIC_ext);	560	sv_unmagic (req->self, PERL_MAGIC_ext);
464	SvREFCNT_dec (req->self);	561	SvREFCNT_dec (req->self);
465	}	562	}
466		563
467	SvREFCNT_dec (req->data);
468	SvREFCNT_dec (req->fh);	564	SvREFCNT_dec (req->sv1);
469	SvREFCNT_dec (req->fh2);	565	SvREFCNT_dec (req->sv2);
470	SvREFCNT_dec (req->callback);	566	SvREFCNT_dec (req->callback);
471	Safefree (req->statdata);
472
473	if (req->type == REQ_READDIR)
474	free (req->data2ptr);
475		567
476	Safefree (req);	568	Safefree (req);
477	}	569	}
478		570
479	static void req_cancel_subs (aio_req grp)	571	static void req_cancel_subs (aio_req grp)
480	{	572	{
481	aio_req sub;	573	aio_req sub;
482		574
483	if (grp->type != REQ_GROUP)	575	if (grp->type != EIO_GROUP)
484	return;	576	return;
485		577
486	SvREFCNT_dec (grp->fh2);	578	SvREFCNT_dec (grp->sv2);
487	grp->fh2 = 0;	579	grp->sv2 = 0;
488		580
489	for (sub = grp->grp_first; sub; sub = sub->grp_next)	581	eio_grp_cancel (grp);
490	req_cancel (sub);
491	}	582	}
492		583
493	static void req_cancel (aio_req req)	584	static void
		585	create_respipe (void)
494	{	586	{
495	req->flags |= FLAG_CANCELLED;	587	if (s_epipe_renew (&respipe))
496		588	croak ("IO::AIO: unable to initialize result pipe");
497	req_cancel_subs (req);
498	}	589	}
499		590
		591	static void poll_wait (void)
		592	{
		593	while (eio_nreqs ())
		594	{
		595	int size;
		596
		597	X_LOCK (reslock);
		598	size = res_queue.size;
		599	X_UNLOCK (reslock);
		600
		601	if (size)
		602	return;
		603
		604	etp_maybe_start_thread ();
		605
		606	s_epipe_wait (&respipe);
		607	}
		608	}
		609
500	static int poll_cb ()	610	static int poll_cb (void)
501	{	611	{
502	dSP;
503	int count = 0;
504	int do_croak = 0;
505	aio_req req;
506
507	for (;;)	612	for (;;)
508	{	613	{
509	LOCK (reslock);	614	int res = eio_poll ();
510	req = reqq_shift (&res_queue);
511		615
512	if (req)	616	if (res > 0)
513	{
514	if (!res_queue.size)
515	{
516	/* read any signals sent by the worker threads */
517	char buf [32];
518	while (read (respipe [0], buf, 32) == 32)
519	;
520	}
521	}
522
523	UNLOCK (reslock);
524
525	if (!req)
526	break;	617	croak (0);
527		618
528	--nreqs;	619	if (!max_outstanding || max_outstanding > eio_nreqs ())
		620	return res;
529		621
530	if (req->type == REQ_QUIT)	622	poll_wait ();
531	started--;
532	else if (req->type == REQ_GROUP && req->length)
533	{
534	req->fd = 1; /* mark request as delayed */
535	continue;
536	}
537	else
538	{
539	if (req->type == REQ_READ)
540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
541
542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
543	SvREADONLY_off (req->data);
544
545	if (req->statdata)
546	{
547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
548	PL_laststatval = req->result;
549	PL_statcache = *(req->statdata);
550	}
551
552	req_invoke (req);
553
554	count++;
555	}
556
557	req_free (req);
558	}	623	}
559
560	return count;
561	}	624	}
562		625
563	static void *aio_proc(void *arg);
564
565	static void start_thread (void)	626	static void atfork_child (void)
566	{	627	{
567	sigset_t fullsigset, oldsigset;	628	create_respipe ();
568	pthread_attr_t attr;
569
570	worker *wrk = calloc (1, sizeof (worker));
571
572	if (!wrk)
573	croak ("unable to allocate worker thread data");
574
575	pthread_attr_init (&attr);
576	pthread_attr_setstacksize (&attr, STACKSIZE);
577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
578
579	sigfillset (&fullsigset);
580
581	LOCK (wrklock);
582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
583
584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
585	{
586	wrk->prev = &wrk_first;
587	wrk->next = wrk_first.next;
588	wrk_first.next->prev = wrk;
589	wrk_first.next = wrk;
590	started++;
591	}
592	else
593	free (wrk);
594
595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
596	UNLOCK (wrklock);
597	}
598
599	static void req_send (aio_req req)
600	{
601	while (started < wanted && nreqs >= started)
602	start_thread ();
603
604	++nreqs;
605
606	LOCK (reqlock);
607	reqq_push (&req_queue, req);
608	pthread_cond_signal (&reqwait);
609	UNLOCK (reqlock);
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	req_send (req);
622	}
623
624	static void min_parallel (int nthreads)
625	{
626	if (wanted < nthreads)
627	wanted = nthreads;
628	}
629
630	static void max_parallel (int nthreads)
631	{
632	int cur = started;
633
634	if (wanted > nthreads)
635	wanted = nthreads;
636
637	while (cur > wanted)
638	{
639	end_thread ();
640	cur--;
641	}
642
643	while (started > wanted)
644	{
645	poll_wait ();
646	poll_cb ();
647	}
648	}
649
650	static void create_pipe ()
651	{
652	if (pipe (respipe))
653	croak ("unable to initialize result pipe");
654
655	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
656	croak ("cannot set result pipe to nonblocking mode");
657
658	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
659	croak ("cannot set result pipe to nonblocking mode");
660	}	629	}
661		630
662	/*****************************************************************************/	631	/*****************************************************************************/
663	/* work around various missing functions */
664		632
665	#if !HAVE_PREADWRITE	633	#if !_POSIX_MAPPED_FILES
666	# define pread aio_pread	634	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
667	# define pwrite aio_pwrite	635	# define munmap(addr,length) (errno = ENOSYS, -1)
668
669	/*
670	* make our pread/pwrite safe against themselves, but not against
671	* normal read/write by using a mutex. slows down execution a lot,
672	* but that's your problem, not mine.
673	*/
674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
675
676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
677	{
678	ssize_t res;
679	off_t ooffset;
680
681	LOCK (preadwritelock);
682	ooffset = lseek (fd, 0, SEEK_CUR);
683	lseek (fd, offset, SEEK_SET);
684	res = read (fd, buf, count);
685	lseek (fd, ooffset, SEEK_SET);
686	UNLOCK (preadwritelock);
687
688	return res;
689	}
690
691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
692	{
693	ssize_t res;
694	off_t ooffset;
695
696	LOCK (preadwritelock);
697	ooffset = lseek (fd, 0, SEEK_CUR);
698	lseek (fd, offset, SEEK_SET);
699	res = write (fd, buf, count);
700	lseek (fd, offset, SEEK_SET);
701	UNLOCK (preadwritelock);
702
703	return res;
704	}
705	#endif
706
707	#if !HAVE_FDATASYNC
708	# define fdatasync fsync
709	#endif
710
711	#if !HAVE_READAHEAD
712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
713
714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
715	{
716	dBUF;
717
718	while (count > 0)
719	{
720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
721
722	pread (fd, aio_buf, len, offset);
723	offset += len;
724	count -= len;
725	}
726
727	errno = 0;
728	}
729
730	#endif
731
732	#if !HAVE_READDIR_R
733	# define readdir_r aio_readdir_r
734
735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
736
737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
738	{
739	struct dirent *e;
740	int errorno;
741
742	LOCK (readdirlock);
743
744	e = readdir (dirp);
745	errorno = errno;
746
747	if (e)
748	{
749	*res = ent;
750	strcpy (ent->d_name, e->d_name);
751	}
752	else
753	*res = 0;
754
755	UNLOCK (readdirlock);
756
757	errno = errorno;
758	return e ? 0 : -1;
759	}
760	#endif
761
762	/* sendfile always needs emulation */
763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
764	{
765	ssize_t res;
766
767	if (!count)
768	return 0;
769
770	#if HAVE_SENDFILE
771	# if __linux
772	res = sendfile (ofd, ifd, &offset, count);
773
774	# elif __freebsd
775	/*
776	* Of course, the freebsd sendfile is a dire hack with no thoughts
777	* wasted on making it similar to other I/O functions.
778	*/
779	{
780	off_t sbytes;
781	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
782
783	if (res < 0 && sbytes)
784	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
785	res = sbytes;
786	}
787
788	# elif __hpux
789	res = sendfile (ofd, ifd, offset, count, 0, 0);
790
791	# elif __solaris
792	{
793	struct sendfilevec vec;
794	size_t sbytes;
795
796	vec.sfv_fd = ifd;
797	vec.sfv_flag = 0;
798	vec.sfv_off = offset;
799	vec.sfv_len = count;
800
801	res = sendfilev (ofd, &vec, 1, &sbytes);
802
803	if (res < 0 && sbytes)
804	res = sbytes;
805	}
806
807	# endif	636	#endif
808	#else
809	res = -1;
810	errno = ENOSYS;
811	#endif
812		637
813	if (res < 0	638	#define MMAP_MAGIC PERL_MAGIC_ext
814	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
815	#if __solaris
816	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
817	#endif
818	)
819	)
820	{
821	/* emulate sendfile. this is a major pain in the ass */
822	dBUF;
823		639
824	res = 0;	640	static int
		641	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		642	{
		643	int old_errno = errno;
		644	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		645	errno = old_errno;
825		646
826	while (count)	647	mg->mg_obj = 0; /* just in case */
827	{
828	ssize_t cnt;
829
830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
831		648
832	if (cnt <= 0)	649	SvREADONLY_off (sv);
833	{
834	if (cnt && !res) res = -1;
835	break;
836	}
837		650
838	cnt = write (ofd, aio_buf, cnt);	651	if (SvPVX (sv) != mg->mg_ptr)
		652	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
839		653
840	if (cnt <= 0)	654	SvCUR_set (sv, 0);
841	{	655	SvPVX (sv) = 0;
842	if (cnt && !res) res = -1;	656	SvOK_off (sv);
843	break;
844	}
845		657
846	offset += cnt;
847	res += cnt;
848	count -= cnt;
849	}
850	}
851
852	return res;	658	return 0;
853	}	659	}
854		660
855	/* read a full directory */	661	static MGVTBL mmap_vtbl = {
856	static void scandir_ (aio_req req, worker *self)	662	0, 0, 0, 0, mmap_free
857	{	663	};
858	DIR *dirp;
859	union
860	{
861	struct dirent d;
862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
863	} *u;
864	struct dirent *entp;
865	char *name, *names;
866	int memlen = 4096;
867	int memofs = 0;
868	int res = 0;
869	int errorno;
870
871	LOCK (wrklock);
872	self->dirp = dirp = opendir (req->dataptr);
873	self->dbuf = u = malloc (sizeof (*u));
874	UNLOCK (wrklock);
875
876	req->data2ptr = names = malloc (memlen);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}
909	}
910
911	if (errno)
912	res = -1;
913
914	req->result = res;
915	}
916		664
917	/*****************************************************************************/	665	/*****************************************************************************/
918		666
919	static void *aio_proc (void *thr_arg)	667	static SV *
		668	get_cb (SV *cb_sv)
920	{	669	{
921	aio_req req;	670	SvGETMAGIC (cb_sv);
922	int type;	671	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}
1010
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}
1038
1039	static void atfork_child (void)
1040	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();
1066
1067	atfork_parent ();
1068	}	672	}
1069		673
1070	#define dREQ \	674	#define dREQ \
		675	SV *cb_cv; \
1071	aio_req req; \	676	aio_req req; \
1072	int req_pri = next_pri; \	677	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \	678	next_pri = EIO_PRI_DEFAULT; \
1074	\	679	\
1075	if (SvOK (callback) && !SvROK (callback)) \	680	cb_cv = get_cb (callback); \
1076	croak ("callback must be undef or of reference type"); \
1077	\	681	\
1078	Newz (0, req, 1, aio_cb); \	682	Newz (0, req, 1, eio_req); \
1079	if (!req) \	683	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \	684	croak ("out of memory during eio_req allocation"); \
1081	\	685	\
1082	req->callback = newSVsv (callback); \	686	req->callback = SvREFCNT_inc (cb_cv); \
1083	req->pri = req_pri	687	req->pri = req_pri
1084		688
1085	#define REQ_SEND \	689	#define REQ_SEND \
		690	PUTBACK; \
1086	req_send (req); \	691	req_submit (req); \
		692	SPAGAIN; \
1087	\	693	\
1088	if (GIMME_V != G_VOID) \	694	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));	695	XPUSHs (req_sv (req, aio_req_stash));
1090		696
1091	MODULE = IO::AIO PACKAGE = IO::AIO	697	MODULE = IO::AIO PACKAGE = IO::AIO
1092		698
1093	PROTOTYPES: ENABLE	699	PROTOTYPES: ENABLE
1094		700
1095	BOOT:	701	BOOT:
1096	{	702	{
		703	static const struct {
		704	const char *name;
		705	IV iv;
		706	} *civ, const_iv[] = {
		707	# define const_niv(name, value) { # name, (IV) value },
		708	# define const_iv(name) { # name, (IV) name },
		709	# define const_eio(name) { # name, (IV) EIO_ ## name },
		710	const_iv (EXDEV)
		711	const_iv (ENOSYS)
		712	const_iv (O_RDONLY)
		713	const_iv (O_WRONLY)
		714	const_iv (O_RDWR)
		715	const_iv (O_CREAT)
		716	const_iv (O_TRUNC)
		717	const_iv (O_EXCL)
		718	const_iv (O_APPEND)
		719	#ifndef _WIN32
		720	const_iv (S_IFIFO)
		721	#endif
		722	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		723	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		724	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		725	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		726	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		727	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		728
		729	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		730	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		731	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		732	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		733	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		734
		735	const_iv (ST_RDONLY)
		736	const_iv (ST_NOSUID)
		737	const_iv (ST_NODEV)
		738	const_iv (ST_NOEXEC)
		739	const_iv (ST_SYNCHRONOUS)
		740	const_iv (ST_MANDLOCK)
		741	const_iv (ST_WRITE)
		742	const_iv (ST_APPEND)
		743	const_iv (ST_IMMUTABLE)
		744	const_iv (ST_NOATIME)
		745	const_iv (ST_NODIRATIME)
		746	const_iv (ST_RELATIME)
		747
		748	const_iv (PROT_EXEC)
		749	const_iv (PROT_NONE)
		750	const_iv (PROT_READ)
		751	const_iv (PROT_WRITE)
		752
		753	/*const_iv (MAP_FIXED)*/
		754	const_iv (MAP_PRIVATE)
		755	const_iv (MAP_SHARED)
		756	const_iv (MAP_ANONYMOUS)
		757
		758	/* linuxish */
		759	const_iv (MAP_HUGETLB)
		760	const_iv (MAP_LOCKED)
		761	const_iv (MAP_NORESERVE)
		762	const_iv (MAP_POPULATE)
		763	const_iv (MAP_NONBLOCK)
		764
		765	const_iv (MCL_FUTURE)
		766	const_iv (MCL_CURRENT)
		767
		768	const_eio (MS_ASYNC)
		769	const_eio (MS_INVALIDATE)
		770	const_eio (MS_SYNC)
		771
		772	const_eio (MT_MODIFY)
		773
		774	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		775	const_eio (SYNC_FILE_RANGE_WRITE)
		776	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		777
		778	const_eio (READDIR_DENTS)
		779	const_eio (READDIR_DIRS_FIRST)
		780	const_eio (READDIR_STAT_ORDER)
		781	const_eio (READDIR_FOUND_UNKNOWN)
		782
		783	const_eio (DT_UNKNOWN)
		784	const_eio (DT_FIFO)
		785	const_eio (DT_CHR)
		786	const_eio (DT_DIR)
		787	const_eio (DT_BLK)
		788	const_eio (DT_REG)
		789	const_eio (DT_LNK)
		790	const_eio (DT_SOCK)
		791	const_eio (DT_WHT)
		792	};
		793
1097	HV *stash = gv_stashpv ("IO::AIO", 1);	794	aio_stash = gv_stashpv ("IO::AIO" , 1);
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	795	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	796	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1101		797
		798	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		799	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		800
		801	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		802
1102	create_pipe ();	803	create_respipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1104	}
1105		804
		805	if (eio_init (want_poll, done_poll) < 0)
		806	croak ("IO::AIO: unable to initialise eio library");
		807
		808	/* atfork child called in fifo order, so before eio's handler */
		809	X_THREAD_ATFORK (0, 0, atfork_child);
		810	}
		811
1106	void	812	void
1107	min_parallel (nthreads)	813	max_poll_reqs (int nreqs)
1108	int nthreads
1109	PROTOTYPE: $	814	PROTOTYPE: $
		815	CODE:
		816	eio_set_max_poll_reqs (nreqs);
1110		817
1111	void	818	void
1112	max_parallel (nthreads)	819	max_poll_time (double nseconds)
1113	int nthreads
1114	PROTOTYPE: $	820	PROTOTYPE: $
		821	CODE:
		822	eio_set_max_poll_time (nseconds);
1115		823
1116	void	824	void
		825	min_parallel (int nthreads)
		826	PROTOTYPE: $
		827	CODE:
		828	eio_set_min_parallel (nthreads);
		829
		830	void
		831	max_parallel (int nthreads)
		832	PROTOTYPE: $
		833	CODE:
		834	eio_set_max_parallel (nthreads);
		835
		836	void
		837	max_idle (int nthreads)
		838	PROTOTYPE: $
		839	CODE:
		840	eio_set_max_idle (nthreads);
		841
		842	void
		843	max_outstanding (int maxreqs)
		844	PROTOTYPE: $
		845	CODE:
		846	max_outstanding = maxreqs;
		847
		848	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	849	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$	850	PROTOTYPE: $$$;$
1123	PPCODE:	851	PPCODE:
1124	{	852	{
1125	dREQ;	853	dREQ;
1126		854
1127	req->type = REQ_OPEN;	855	req->type = EIO_OPEN;
1128	req->data = newSVsv (pathname);	856	req->sv1 = newSVsv (pathname);
1129	req->dataptr = SvPVbyte_nolen (req->data);	857	req->ptr1 = SvPVbyte_nolen (req->sv1);
1130	req->fd = flags;	858	req->int1 = flags;
1131	req->mode = mode;	859	req->int2 = mode;
1132		860
1133	REQ_SEND;	861	REQ_SEND;
1134	}	862	}
1135		863
1136	void	864	void
1137	aio_close (fh,callback=&PL_sv_undef)	865	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$	866	PROTOTYPE: $;$
1141	ALIAS:	867	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC	868	aio_fsync = EIO_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC	869	aio_fdatasync = EIO_FDATASYNC
1145	PPCODE:	870	PPCODE:
1146	{	871	{
		872	int fd = s_fileno_croak (fh, 0);
1147	dREQ;	873	dREQ;
1148		874
1149	req->type = ix;	875	req->type = ix;
1150	req->fh = newSVsv (fh);	876	req->sv1 = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	877	req->int1 = fd;
1152		878
1153	REQ_SEND (req);	879	REQ_SEND (req);
1154	}	880	}
1155		881
1156	void	882	void
		883	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		884	PROTOTYPE: $$$$;$
		885	PPCODE:
		886	{
		887	int fd = s_fileno_croak (fh, 0);
		888	dREQ;
		889
		890	req->type = EIO_SYNC_FILE_RANGE;
		891	req->sv1 = newSVsv (fh);
		892	req->int1 = fd;
		893	req->offs = offset;
		894	req->size = nbytes;
		895	req->int2 = flags;
		896
		897	REQ_SEND (req);
		898	}
		899
		900	void
		901	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		902	PROTOTYPE: $;$
		903	PPCODE:
		904	{
		905	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		906	int fd = s_fileno_croak (fh, 0);
		907	dREQ;
		908
		909	if (close_pipe < 0)
		910	{
		911	int pipefd [2];
		912
		913	if (pipe (pipefd) < 0
		914	|| close (pipefd [1]) < 0
		915	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		916	abort (); /*D*/
		917
		918	close_pipe = pipefd [0];
		919	}
		920
		921	req->type = EIO_DUP2;
		922	req->int1 = close_pipe;
		923	req->sv2 = newSVsv (fh);
		924	req->int2 = fd;
		925
		926	REQ_SEND (req);
		927	}
		928
		929	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	930	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:	931	ALIAS:
1165	aio_read = REQ_READ	932	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	933	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$	934	PROTOTYPE: $$$$$;$
1168	PPCODE:	935	PPCODE:
1169	{	936	{
1170	aio_req req;
1171	STRLEN svlen;	937	STRLEN svlen;
		938	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1172	char *svptr = SvPVbyte (data, svlen);	939	char *svptr = SvPVbyte (data, svlen);
1173		940	UV len = SvUV (length);
1174	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);
1176		941
1177	if (dataoffset < 0)	942	if (dataoffset < 0)
1178	dataoffset += svlen;	943	dataoffset += svlen;
1179		944
1180	if (dataoffset < 0 || dataoffset > svlen)	945	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	946	croak ("dataoffset outside of data scalar");
1182		947
1183	if (ix == REQ_WRITE)	948	if (ix == EIO_WRITE)
1184	{	949	{
1185	/* write: check length and adjust. */	950	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	951	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	952	len = svlen - dataoffset;
1188	}	953	}
1189	else	954	else
1190	{	955	{
1191	/* read: grow scalar as necessary */	956	/* read: check type and grow scalar as necessary */
		957	SvUPGRADE (data, SVt_PV);
1192	svptr = SvGROW (data, length + dataoffset);	958	svptr = SvGROW (data, len + dataoffset + 1);
1193	}	959	}
1194
1195	if (length < 0)
1196	croak ("length must not be negative");
1197		960
1198	{	961	{
1199	dREQ;	962	dREQ;
1200		963
1201	req->type = ix;	964	req->type = ix;
1202	req->fh = newSVsv (fh);	965	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	966	req->int1 = fd;
1204	: IoOFP (sv_2io (fh)));	967	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	968	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	969	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	970	req->ptr2 = (char *)svptr + dataoffset;
		971	req->stroffset = dataoffset;
1209		972
1210	if (!SvREADONLY (data))	973	if (!SvREADONLY (data))
1211	{	974	{
1212	SvREADONLY_on (data);	975	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	976	req->flags |= FLAG_SV2_RO_OFF;
1214	}	977	}
1215		978
1216	REQ_SEND;	979	REQ_SEND;
1217	}	980	}
1218	}	981	}
1219		982
1220	void	983	void
		984	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		985	PROTOTYPE: $$;$
		986	PPCODE:
		987	{
		988	SV *data;
		989	dREQ;
		990
		991	req->type = EIO_READLINK;
		992	req->sv1 = newSVsv (path);
		993	req->ptr1 = SvPVbyte_nolen (req->sv1);
		994
		995	REQ_SEND;
		996	}
		997
		998	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	999	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1222	SV * out_fh
1223	SV * in_fh
1224	UV in_offset
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$	1000	PROTOTYPE: $$$$;$
1228	PPCODE:	1001	PPCODE:
1229	{	1002	{
		1003	int ifd = s_fileno_croak (in_fh , 0);
		1004	int ofd = s_fileno_croak (out_fh, 1);
1230	dREQ;	1005	dREQ;
1231		1006
1232	req->type = REQ_SENDFILE;	1007	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	1008	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1009	req->int1 = ofd;
1235	req->fh2 = newSVsv (in_fh);	1010	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1011	req->int2 = ifd;
1237	req->offset = in_offset;	1012	req->offs = in_offset;
1238	req->length = length;	1013	req->size = length;
1239		1014
1240	REQ_SEND;	1015	REQ_SEND;
1241	}	1016	}
1242		1017
1243	void	1018	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1019	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$	1020	PROTOTYPE: $$$;$
1250	PPCODE:	1021	PPCODE:
1251	{	1022	{
		1023	int fd = s_fileno_croak (fh, 0);
1252	dREQ;	1024	dREQ;
1253		1025
1254	req->type = REQ_READAHEAD;	1026	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	1027	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1028	req->int1 = fd;
1257	req->offset = offset;	1029	req->offs = offset;
1258	req->length = length;	1030	req->size = length;
1259		1031
1260	REQ_SEND;	1032	REQ_SEND;
1261	}	1033	}
1262		1034
1263	void	1035	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	1036	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	1037	ALIAS:
1268	aio_stat = REQ_STAT	1038	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	1039	aio_lstat = EIO_LSTAT
		1040	aio_statvfs = EIO_STATVFS
1270	PPCODE:	1041	PPCODE:
1271	{	1042	{
1272	dREQ;	1043	dREQ;
1273		1044
1274	New (0, req->statdata, 1, Stat_t);	1045	req->sv1 = newSVsv (fh_or_path);
1275	if (!req->statdata)
1276	{
1277	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");
1279	}
1280		1046
1281	if (SvPOK (fh_or_path))	1047	if (SvPOK (req->sv1))
1282	{	1048	{
1283	req->type = ix;	1049	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);	1050	req->ptr1 = SvPVbyte_nolen (req->sv1);
1286	}	1051	}
1287	else	1052	else
1288	{	1053	{
1289	req->type = REQ_FSTAT;	1054	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1055	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}	1056	}
1293		1057
1294	REQ_SEND;	1058	REQ_SEND;
1295	}	1059	}
1296		1060
1297	void	1061	void
		1062	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1063	PPCODE:
		1064	{
		1065	dREQ;
		1066
		1067	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1068	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1069	req->sv1 = newSVsv (fh_or_path);
		1070
		1071	if (SvPOK (req->sv1))
		1072	{
		1073	req->type = EIO_UTIME;
		1074	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1075	}
		1076	else
		1077	{
		1078	req->type = EIO_FUTIME;
		1079	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1080	}
		1081
		1082	REQ_SEND;
		1083	}
		1084
		1085	void
		1086	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1087	PPCODE:
		1088	{
		1089	dREQ;
		1090
		1091	req->sv1 = newSVsv (fh_or_path);
		1092	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1093
		1094	if (SvPOK (req->sv1))
		1095	{
		1096	req->type = EIO_TRUNCATE;
		1097	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1098	}
		1099	else
		1100	{
		1101	req->type = EIO_FTRUNCATE;
		1102	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1103	}
		1104
		1105	REQ_SEND;
		1106	}
		1107
		1108	void
		1109	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1110	ALIAS:
		1111	aio_chmod = EIO_CHMOD
		1112	aio_mkdir = EIO_MKDIR
		1113	PPCODE:
		1114	{
		1115	dREQ;
		1116
		1117	req->int2 = mode;
		1118	req->sv1 = newSVsv (fh_or_path);
		1119
		1120	if (SvPOK (req->sv1))
		1121	{
		1122	req->type = ix;
		1123	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1124	}
		1125	else
		1126	{
		1127	req->type = EIO_FCHMOD;
		1128	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1129	}
		1130
		1131	REQ_SEND;
		1132	}
		1133
		1134	void
		1135	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1136	PPCODE:
		1137	{
		1138	dREQ;
		1139
		1140	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1141	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1142	req->sv1 = newSVsv (fh_or_path);
		1143
		1144	if (SvPOK (req->sv1))
		1145	{
		1146	req->type = EIO_CHOWN;
		1147	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1148	}
		1149	else
		1150	{
		1151	req->type = EIO_FCHOWN;
		1152	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1153	}
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	dREQ;
		1163
		1164	req->type = EIO_READDIR;
		1165	req->sv1 = newSVsv (pathname);
		1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1167	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1168
		1169	if (flags & EIO_READDIR_DENTS)
		1170	req->int1 |= EIO_READDIR_CUSTOM2;
		1171
		1172	REQ_SEND;
		1173	}
		1174
		1175	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	1176	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	1177	ALIAS:
1302	aio_unlink = REQ_UNLINK	1178	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	1179	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	1180	aio_readdir = EIO_READDIR
1305	PPCODE:	1181	PPCODE:
1306	{	1182	{
1307	dREQ;	1183	dREQ;
1308		1184
1309	req->type = ix;	1185	req->type = ix;
1310	req->data = newSVsv (pathname);	1186	req->sv1 = newSVsv (pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	1187	req->ptr1 = SvPVbyte_nolen (req->sv1);
1312		1188
1313	REQ_SEND;	1189	REQ_SEND;
1314	}	1190	}
1315		1191
1316	void	1192	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1193	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:	1194	ALIAS:
1322	aio_link = REQ_LINK	1195	aio_link = EIO_LINK
1323	aio_symlink = REQ_SYMLINK	1196	aio_symlink = EIO_SYMLINK
1324	aio_rename = REQ_RENAME	1197	aio_rename = EIO_RENAME
1325	PPCODE:	1198	PPCODE:
1326	{	1199	{
1327	dREQ;	1200	dREQ;
1328		1201
1329	req->type = ix;	1202	req->type = ix;
1330	req->fh = newSVsv (oldpath);	1203	req->sv1 = newSVsv (oldpath);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	1204	req->ptr1 = SvPVbyte_nolen (req->sv1);
1332	req->data = newSVsv (newpath);	1205	req->sv2 = newSVsv (newpath);
1333	req->dataptr = SvPVbyte_nolen (req->data);	1206	req->ptr2 = SvPVbyte_nolen (req->sv2);
1334		1207
1335	REQ_SEND;	1208	REQ_SEND;
1336	}	1209	}
1337		1210
1338	void	1211	void
1339	aio_busy (delay,callback=&PL_sv_undef)	1212	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	1213	PPCODE:
1343	{	1214	{
1344	dREQ;	1215	dREQ;
1345		1216
1346	req->type = REQ_BUSY;	1217	req->type = EIO_MKNOD;
1347	req->fd = delay < 0. ? 0 : delay;	1218	req->sv1 = newSVsv (pathname);
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1219	req->ptr1 = SvPVbyte_nolen (req->sv1);
1349		1220	req->int2 = (mode_t)mode;
		1221	req->offs = dev;
		1222
1350	REQ_SEND;	1223	REQ_SEND;
1351	}	1224	}
1352		1225
1353	void	1226	void
		1227	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1228	ALIAS:
		1229	aio_mtouch = EIO_MTOUCH
		1230	aio_msync = EIO_MSYNC
		1231	PROTOTYPE: $$$$;$
		1232	PPCODE:
		1233	{
		1234	STRLEN svlen;
		1235	UV len = SvUV (length);
		1236	char *svptr = SvPVbyte (data, svlen);
		1237
		1238	if (offset < 0)
		1239	offset += svlen;
		1240
		1241	if (offset < 0 || offset > svlen)
		1242	croak ("offset outside of scalar");
		1243
		1244	if (!SvOK (length) || len + offset > svlen)
		1245	len = svlen - offset;
		1246
		1247	{
		1248	dREQ;
		1249
		1250	req->type = ix;
		1251	req->size = len;
		1252	req->sv2 = SvREFCNT_inc (data);
		1253	req->ptr2 = (char *)svptr + offset;
		1254	req->int1 = flags;
		1255
		1256	REQ_SEND;
		1257	}
		1258	}
		1259
		1260	void
		1261	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1262	PPCODE:
		1263	{
		1264	dREQ;
		1265
		1266	req->type = EIO_BUSY;
		1267	req->nv1 = delay < 0. ? 0. : delay;
		1268
		1269	REQ_SEND;
		1270	}
		1271
		1272	void
1354	aio_group (callback=&PL_sv_undef)	1273	aio_group (SV *callback=&PL_sv_undef)
1355	SV * callback
1356	PROTOTYPE: ;$	1274	PROTOTYPE: ;$
1357	PPCODE:	1275	PPCODE:
1358	{	1276	{
1359	dREQ;	1277	dREQ;
1360		1278
1361	req->type = REQ_GROUP;	1279	req->type = EIO_GROUP;
		1280
1362	req_send (req);	1281	req_submit (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1282	XPUSHs (req_sv (req, aio_grp_stash));
1365	}	1283	}
1366		1284
1367	void	1285	void
1368	aio_nop (callback=&PL_sv_undef)	1286	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback	1287	ALIAS:
		1288	aio_nop = EIO_NOP
		1289	aio_sync = EIO_SYNC
1370	PPCODE:	1290	PPCODE:
1371	{	1291	{
1372	dREQ;	1292	dREQ;
1373		1293
1374	req->type = REQ_NOP;	1294	req->type = ix;
1375		1295
1376	REQ_SEND;	1296	REQ_SEND;
1377	}	1297	}
1378		1298
1379	void	1299	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	1300	aioreq_pri (int pri = 0)
1381	CODE:	1301	PROTOTYPE: ;$
		1302	CODE:
		1303	RETVAL = next_pri;
		1304	if (items > 0)
		1305	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	1306	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	1307	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	1308	next_pri = pri;
		1309	}
		1310	OUTPUT:
		1311	RETVAL
1385		1312
1386	void	1313	void
1387	aioreq_nice (int nice = 0)	1314	aioreq_nice (int nice = 0)
1388	CODE:	1315	CODE:
1389	nice = next_pri - nice;	1316	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	1317	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	1318	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	1319	next_pri = nice;
1393		1320
1394	void	1321	void
1395	flush ()	1322	flush ()
1396	PROTOTYPE:	1323	PROTOTYPE:
1397	CODE:	1324	CODE:
1398	while (nreqs)	1325	while (eio_nreqs ())
1399	{	1326	{
1400	poll_wait ();	1327	poll_wait ();
1401	poll_cb ();	1328	poll_cb ();
1402	}	1329	}
1403		1330
1404	void	1331	int
1405	poll()	1332	poll()
1406	PROTOTYPE:	1333	PROTOTYPE:
1407	CODE:	1334	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	1335	poll_wait ();
1411	poll_cb ();	1336	RETVAL = poll_cb ();
1412	}	1337	OUTPUT:
		1338	RETVAL
1413		1339
1414	int	1340	int
1415	poll_fileno()	1341	poll_fileno()
1416	PROTOTYPE:	1342	PROTOTYPE:
1417	CODE:	1343	CODE:
1418	RETVAL = respipe [0];	1344	RETVAL = s_epipe_fd (&respipe);
1419	OUTPUT:	1345	OUTPUT:
1420	RETVAL	1346	RETVAL
1421		1347
1422	int	1348	int
1423	poll_cb(...)	1349	poll_cb(...)
…		…
1429		1355
1430	void	1356	void
1431	poll_wait()	1357	poll_wait()
1432	PROTOTYPE:	1358	PROTOTYPE:
1433	CODE:	1359	CODE:
1434	if (nreqs)
1435	poll_wait ();	1360	poll_wait ();
1436		1361
1437	int	1362	int
1438	nreqs()	1363	nreqs()
1439	PROTOTYPE:	1364	PROTOTYPE:
1440	CODE:	1365	CODE:
1441	RETVAL = nreqs;	1366	RETVAL = eio_nreqs ();
1442	OUTPUT:	1367	OUTPUT:
1443	RETVAL	1368	RETVAL
1444		1369
		1370	int
		1371	nready()
		1372	PROTOTYPE:
		1373	CODE:
		1374	RETVAL = eio_nready ();
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	int
		1379	npending()
		1380	PROTOTYPE:
		1381	CODE:
		1382	RETVAL = eio_npending ();
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
		1387	nthreads()
		1388	PROTOTYPE:
		1389	CODE:
		1390	RETVAL = eio_nthreads ();
		1391	OUTPUT:
		1392	RETVAL
		1393
		1394	int
		1395	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1396	PROTOTYPE: $$$$
		1397	CODE:
		1398	RETVAL = posix_fadvise (fh, offset, length, advice);
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	ssize_t
		1403	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1404	PROTOTYPE: $$$$
		1405	CODE:
		1406	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1407	OUTPUT:
		1408	RETVAL
		1409
		1410	void
		1411	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1412	PROTOTYPE: $$$$$;$
		1413	PPCODE:
		1414	sv_unmagic (scalar, MMAP_MAGIC);
		1415	{
		1416	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1417	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1418	if (addr == (void *)-1)
		1419	XSRETURN_NO;
		1420
		1421	sv_force_normal (scalar);
		1422
		1423	/* we store the length in mg_obj, as namlen is I32 :/ */
		1424	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1425	->mg_obj = (SV *)length;
		1426
		1427	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1428
		1429	if (!(prot & PROT_WRITE))
		1430	SvREADONLY_on (scalar);
		1431
		1432	if (SvLEN (scalar))
		1433	Safefree (SvPVX (scalar));
		1434
		1435	SvPVX (scalar) = (char *)addr;
		1436	SvCUR_set (scalar, length);
		1437	SvLEN_set (scalar, 0);
		1438	SvPOK_only (scalar);
		1439
		1440	XSRETURN_YES;
		1441	}
		1442
		1443	void
		1444	munmap (SV *scalar)
		1445	PROTOTYPE: $
		1446	CODE:
		1447	sv_unmagic (scalar, MMAP_MAGIC);
		1448
		1449	int
		1450	madvise (SV *scalar, off_t offset, off_t length, IV advice)
		1451	PROTOTYPE: $$$$
		1452	CODE:
		1453	{
		1454	char *addr = SvPV_nolen (scalar) + offset;
		1455
		1456	if (!SvOK (ST (2)))
		1457	length = SvCUR (scalar) - offset;
		1458
		1459	if (addr >= SvEND (scalar) || length <= 0)
		1460	XSRETURN_EMPTY;
		1461
		1462	RETVAL = posix_madvise (addr, length, advice);
		1463	}
		1464	OUTPUT:
		1465	RETVAL
		1466
		1467	int
		1468	mlockall (int flags)
		1469	PROTOTYPE: $
		1470	CODE:
		1471	#if _POSIX_MEMLOCK
		1472	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1473	extern int mallopt (int, int);
		1474	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1475	#endif
		1476	mlockall (flags);
		1477	#else
		1478	RETVAL = -1;
		1479	errno = ENOSYS;
		1480	#endif
		1481	OUTPUT:
		1482	RETVAL
		1483
		1484	int
		1485	munlockall ()
		1486	PROTOTYPE:
		1487	CODE:
		1488	#if _POSIX_MEMLOCK
		1489	munlockall ();
		1490	#else
		1491	RETVAL = -1;
		1492	errno = ENOSYS;
		1493	#endif
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	void _on_next_submit (SV *cb)
		1498	CODE:
		1499	SvREFCNT_dec (on_next_submit);
		1500	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1501
1445	PROTOTYPES: DISABLE	1502	PROTOTYPES: DISABLE
1446		1503
1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1504	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1448		1505
1449	void	1506	void
1450	cancel (aio_req_ornot req)	1507	cancel (aio_req_ornot req)
1451	CODE:	1508	CODE:
1452	req_cancel (req);	1509	eio_cancel (req);
1453		1510
1454	void	1511	void
1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1512	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1456	CODE:	1513	PPCODE:
		1514	{
		1515	if (GIMME_V != G_VOID)
		1516	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1517
		1518	if (items > 1)
		1519	{
		1520	SV *cb_cv =get_cb (callback);
		1521
1457	SvREFCNT_dec (req->callback);	1522	SvREFCNT_dec (req->callback);
1458	req->callback = newSVsv (callback);	1523	req->callback = SvREFCNT_inc (cb_cv);
		1524	}
		1525	}
1459		1526
1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1461		1528
1462	void	1529	void
1463	add (aio_req grp, ...)	1530	add (aio_req grp, ...)
1464	PPCODE:	1531	PPCODE:
1465	{	1532	{
1466	int i;	1533	int i;
1467	aio_req req;
1468		1534
1469	if (grp->fd == 2)	1535	if (grp->int1 == 2)
1470	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1536	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1471		1537
1472	for (i = 1; i < items; ++i )	1538	for (i = 1; i < items; ++i )
1473	{	1539	{
		1540	aio_req req;
		1541
1474	if (GIMME_V != G_VOID)	1542	if (GIMME_V != G_VOID)
1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1543	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1476		1544
1477	req = SvAIO_REQ (ST (i));	1545	req = SvAIO_REQ (ST (i));
1478		1546
1479	if (req)	1547	if (req)
1480	{	1548	eio_grp_add (grp, req);
1481	++grp->length;
1482	req->grp = grp;
1483
1484	req->grp_prev = 0;
1485	req->grp_next = grp->grp_first;
1486
1487	if (grp->grp_first)
1488	grp->grp_first->grp_prev = req;
1489
1490	grp->grp_first = req;
1491	}
1492	}	1549	}
1493	}	1550	}
1494		1551
1495	void	1552	void
1496	cancel_subs (aio_req_ornot req)	1553	cancel_subs (aio_req_ornot req)
…		…
1500	void	1557	void
1501	result (aio_req grp, ...)	1558	result (aio_req grp, ...)
1502	CODE:	1559	CODE:
1503	{	1560	{
1504	int i;	1561	int i;
		1562	AV *av;
		1563
		1564	grp->errorno = errno;
		1565
1505	AV *av = newAV ();	1566	av = newAV ();
		1567	av_extend (av, items - 1);
1506		1568
1507	for (i = 1; i < items; ++i )	1569	for (i = 1; i < items; ++i )
1508	av_push (av, newSVsv (ST (i)));	1570	av_push (av, newSVsv (ST (i)));
1509		1571
1510	SvREFCNT_dec (grp->data);	1572	SvREFCNT_dec (grp->sv1);
1511	grp->data = (SV *)av;	1573	grp->sv1 = (SV *)av;
1512	}	1574	}
		1575
		1576	void
		1577	errno (aio_req grp, int errorno = errno)
		1578	CODE:
		1579	grp->errorno = errorno;
1513		1580
1514	void	1581	void
1515	limit (aio_req grp, int limit)	1582	limit (aio_req grp, int limit)
1516	CODE:	1583	CODE:
1517	grp->fd2 = limit;	1584	eio_grp_limit (grp, limit);
1518	aio_grp_feed (grp);
1519		1585
1520	void	1586	void
1521	feed (aio_req grp, SV *callback=&PL_sv_undef)	1587	feed (aio_req grp, SV *callback=&PL_sv_undef)
1522	CODE:	1588	CODE:
1523	{	1589	{
1524	SvREFCNT_dec (grp->fh2);	1590	SvREFCNT_dec (grp->sv2);
1525	grp->fh2 = newSVsv (callback);	1591	grp->sv2 = newSVsv (callback);
		1592	grp->feed = aio_grp_feed;
1526		1593
1527	if (grp->fd2 <= 0)	1594	if (grp->int2 <= 0)
1528	grp->fd2 = 2;	1595	grp->int2 = 2;
1529		1596
1530	aio_grp_feed (grp);	1597	eio_grp_limit (grp, grp->int2);
1531	}	1598	}
1532		1599

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