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

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