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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC vs.
Revision 1.176 by root, Thu Dec 2 10:04:47 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/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
42	# else	216	# else
43	# error sendfile support requested but not available	217	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	218	# endif
45	#endif	219	#endif
46		220	#ifndef MAP_HUGETLB
47	/* used for struct dirent, AIX doesn't provide it */	221	# define MAP_HUGETLB 0
48	#ifndef NAME_MAX
49	# define NAME_MAX 4096
50	#endif	222	#endif
51		223	#ifndef MAP_LOCKED
52	#if __ia64	224	# define MAP_LOCKED 0
53	# define STACKSIZE 65536
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#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
59		235
60	/* buffer size for various temporary buffers */	236	#ifndef PAGESIZE
61	#define AIO_BUFSIZE 65536	237	# define PAGESIZE sysconf (_SC_PAGESIZE)
		238	#endif
62		239
63	#define dBUF \	240	static int req_invoke (eio_req *req);
64	char *aio_buf; \	241	#define EIO_FINISH(req) req_invoke (req)
65	LOCK (wrklock); \	242	static void req_destroy (eio_req *grp);
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	243	#define EIO_DESTROY(req) req_destroy (req)
67	UNLOCK (wrklock); \
68	if (!aio_buf) \
69	return -1;
70		244
71	enum {	245	enum {
72	REQ_QUIT,	246	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};	247	};
84		248
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	249	#include "libeio/eio.c"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		250
88	typedef struct aio_cb
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;
93	SV *fh, *fh2;
94	void *dataptr, *data2ptr;
95	Stat_t *statdata;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99
100	STRLEN dataoffset;
101	int type;
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105
106	unsigned char flags;
107	unsigned char pri;
108
109	SV *self; /* the perl counterpart of this request, if any */
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
111	} aio_cb;
112
113	enum {
114	FLAG_CANCELLED = 0x01,
115	};
116
117	typedef aio_cb *aio_req;	251	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	252	typedef eio_req *aio_req_ornot;
119		253
120	enum {	254	static SV *on_next_submit;
121	PRI_MIN = -4,	255	static int next_pri = EIO_PRI_DEFAULT;
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int max_outstanding = 1<<30;	256	static int max_outstanding;
134	static int respipe [2];
135		257
136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	258	static s_epipe respipe;
137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138	#else
139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140	#endif
141		259
142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))	260	static void req_destroy (aio_req req);
143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145	/* worker threasd management */
146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148	typedef struct worker {
149	/* locked by wrklock */
150	struct worker *prev, *next;
151
152	pthread_t tid;
153
154	/* locked by reslock, reqlock or wrklock */
155	aio_req req; /* currently processed request */
156	void *dbuf;
157	DIR *dirp;
158	} worker;
159
160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162	static void worker_clear (worker *wrk)
163	{
164	if (wrk->dirp)
165	{
166	closedir (wrk->dirp);
167	wrk->dirp = 0;
168	}
169
170	if (wrk->dbuf)
171	{
172	free (wrk->dbuf);
173	wrk->dbuf = 0;
174	}
175	}
176
177	static void worker_free (worker *wrk)
178	{
179	wrk->next->prev = wrk->prev;
180	wrk->prev->next = wrk->next;
181
182	free (wrk);
183	}
184
185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
188
189	/*
190	* a somewhat faster data structure might be nice, but
191	* with 8 priorities this actually needs <20 insns
192	* per shift, the most expensive operation.
193	*/
194	typedef struct {
195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196	int size;
197	} reqq;
198
199	static reqq req_queue;
200	static reqq res_queue;
201
202	int reqq_push (reqq *q, aio_req req)
203	{
204	int pri = req->pri;
205	req->next = 0;
206
207	if (q->qe[pri])
208	{
209	q->qe[pri]->next = req;
210	q->qe[pri] = req;
211	}
212	else
213	q->qe[pri] = q->qs[pri] = req;
214
215	return q->size++;
216	}
217
218	aio_req reqq_shift (reqq *q)
219	{
220	int pri;
221
222	if (!q->size)
223	return 0;
224
225	--q->size;
226
227	for (pri = NUM_PRI; pri--; )
228	{
229	aio_req req = q->qs[pri];
230
231	if (req)
232	{
233	if (!(q->qs[pri] = req->next))
234	q->qe[pri] = 0;
235
236	return req;
237	}
238	}
239
240	abort ();
241	}
242
243	static void req_invoke (aio_req req);	261	static void req_cancel (aio_req req);
244	static void req_free (aio_req req);	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	}
245		274
246	/* must be called at most once */	275	/* must be called at most once */
247	static SV *req_sv (aio_req req, const char *klass)	276	static SV *req_sv (aio_req req, HV *stash)
248	{	277	{
249	if (!req->self)	278	if (!req->self)
250	{	279	{
251	req->self = (SV *)newHV ();	280	req->self = (SV *)newHV ();
252	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	281	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
253	}	282	}
254		283
255	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	284	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
256	}	285	}
257		286
258	static aio_req SvAIO_REQ (SV *sv)	287	static aio_req SvAIO_REQ (SV *sv)
259	{	288	{
260	MAGIC *mg;	289	MAGIC *mg;
261		290
262	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")))
263	croak ("object of class " AIO_REQ_KLASS " expected");	295	croak ("object of class IO::AIO::REQ expected");
264		296
265	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	297	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
266		298
267	return mg ? (aio_req)mg->mg_ptr : 0;	299	return mg ? (aio_req)mg->mg_ptr : 0;
268	}	300	}
269		301
270	static void aio_grp_feed (aio_req grp)	302	static void aio_grp_feed (aio_req grp)
271	{	303	{
272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	304	if (grp->sv2 && SvOK (grp->sv2))
273	{	305	{
274	int old_len = grp->length;
275
276	if (grp->fh2 && SvOK (grp->fh2))
277	{
278	dSP;	306	dSP;
279		307
280	ENTER;	308	ENTER;
281	SAVETMPS;	309	SAVETMPS;
282	PUSHMARK (SP);	310	PUSHMARK (SP);
283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	311	XPUSHs (req_sv (grp, aio_grp_stash));
284	PUTBACK;	312	PUTBACK;
285	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	313	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
286	SPAGAIN;	314	SPAGAIN;
287	FREETMPS;	315	FREETMPS;
288	LEAVE;	316	LEAVE;
289	}
290
291	/* stop if no progress has been made */
292	if (old_len == grp->length)
293	{
294	SvREFCNT_dec (grp->fh2);
295	grp->fh2 = 0;
296	break;
297	}
298	}	317	}
299	}	318	}
300		319
301	static void aio_grp_dec (aio_req grp)	320	static void req_submit (eio_req *req)
302	{	321	{
303	--grp->length;	322	eio_submit (req);
304		323
305	/* call feeder, if applicable */	324	if (expect_false (on_next_submit))
306	aio_grp_feed (grp);
307
308	/* finish, if done */
309	if (!grp->length && grp->fd)
310	{	325	{
311	req_invoke (grp);	326	dSP;
312	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);
313	}	334	}
314	}	335	}
315		336
316	static void poll_wait ()	337	static int req_invoke (eio_req *req)
317	{	338	{
318	fd_set rfd;	339	if (req->flags & FLAG_SV2_RO_OFF)
		340	SvREADONLY_off (req->sv2);
319		341
320	while (nreqs)	342	if (!EIO_CANCELLED (req) && req->callback)
321	{	343	{
322	int size;
323	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324	LOCK (reslock);
325	#endif
326	size = res_queue.size;
327	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328	UNLOCK (reslock);
329	#endif
330
331	if (size)
332	return;
333
334	FD_ZERO(&rfd);
335	FD_SET(respipe [0], &rfd);
336
337	select (respipe [0] + 1, &rfd, 0, 0, 0);
338	}
339	}
340
341	static void req_invoke (aio_req req)
342	{
343	dSP;	344	dSP;
344		345	static SV *sv_result_cache; /* caches the result integer SV */
345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	346	SV *sv_result;
346	{
347	errno = req->errorno;
348		347
349	ENTER;	348	ENTER;
350	SAVETMPS;	349	SAVETMPS;
351	PUSHMARK (SP);	350	PUSHMARK (SP);
352	EXTEND (SP, 1);	351	EXTEND (SP, 1);
353		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	}
		359	else
		360	{
		361	sv_result = newSViv (req->result);
		362	SvREADONLY_on (sv_result);
		363	}
		364
354	switch (req->type)	365	switch (req->type)
355	{	366	{
356	case REQ_READDIR:	367	case EIO_READDIR:
357	{	368	{
358	SV *rv = &PL_sv_undef;	369	SV *rv = &PL_sv_undef;
359		370
360	if (req->result >= 0)	371	if (req->result >= 0)
361	{	372	{
362	int i;	373	int i;
363	char *buf = req->data2ptr;	374	char *names = (char *)req->ptr2;
		375	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
364	AV *av = newAV ();	376	AV *av = newAV ();
365		377
366	av_extend (av, req->result - 1);	378	av_extend (av, req->result - 1);
367		379
368	for (i = 0; i < req->result; ++i)	380	for (i = 0; i < req->result; ++i)
369	{	381	{
370	SV *sv = newSVpv (buf, 0);	382	if (req->int1 & EIO_READDIR_DENTS)
		383	{
		384	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
371		385
		386	if (req->int1 & EIO_READDIR_CUSTOM2)
		387	{
		388	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		389	AV *avent = newAV ();
		390
		391	av_extend (avent, 2);
		392
		393	if (!sv_type [ent->type])
		394	{
		395	sv_type [ent->type] = newSViv (ent->type);
		396	SvREADONLY_on (sv_type [ent->type]);
		397	}
		398
		399	av_store (avent, 0, namesv);
		400	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		401	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		402
		403	av_store (av, i, newRV_noinc ((SV *)avent));
		404	}
		405	else
372	av_store (av, i, sv);	406	av_store (av, i, namesv);
		407
		408	++ent;
		409	}
		410	else
		411	{
		412	SV *name = newSVpv (names, 0);
		413	av_store (av, i, name);
373	buf += SvCUR (sv) + 1;	414	names += SvCUR (name) + 1;
		415	}
374	}	416	}
375		417
376	rv = sv_2mortal (newRV_noinc ((SV *)av));	418	rv = sv_2mortal (newRV_noinc ((SV *)av));
377	}	419	}
378		420
379	PUSHs (rv);	421	PUSHs (rv);
		422
		423	if (req->int1 & EIO_READDIR_CUSTOM1)
		424	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
380	}	425	}
381	break;	426	break;
382		427
383	case REQ_OPEN:	428	case EIO_OPEN:
384	{	429	{
385	/* convert fd to fh */	430	/* convert fd to fh */
386	SV *fh;	431	SV *fh = &PL_sv_undef;
387		432
388	PUSHs (sv_2mortal (newSViv (req->result)));	433	if (req->result >= 0)
389	PUTBACK;	434	{
390	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	435	GV *gv = (GV *)sv_newmortal ();
391	SPAGAIN;	436	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		437	char sym [64];
		438	int symlen;
		439
		440	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		441	gv_init (gv, aio_stash, sym, symlen, 0);
392		442
393	fh = SvREFCNT_inc (POPs);	443	symlen = snprintf (
		444	sym,
		445	sizeof (sym),
		446	"%s&=%d",
		447	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		448	(int)req->result
		449	);
394		450
		451	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		452	fh = (SV *)gv;
		453	}
		454
395	PUSHMARK (SP);	455	PUSHs (fh);
396	XPUSHs (sv_2mortal (fh));
397	}	456	}
398	break;	457	break;
399		458
		459	case EIO_STATVFS:
		460	case EIO_FSTATVFS:
		461	{
		462	SV *rv = &PL_sv_undef;
		463
		464	if (req->result >= 0)
		465	{
		466	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		467	HV *hv = newHV ();
		468
		469	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		470
		471	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		472	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		473	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		474	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		475	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		476	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		477	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		478	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		479	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		480	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		481	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		482	}
		483
		484	PUSHs (rv);
		485	}
		486
		487	break;
		488
400	case REQ_GROUP:	489	case EIO_GROUP:
401	req->fd = 2; /* mark group as finished */	490	req->int1 = 2; /* mark group as finished */
402		491
403	if (req->data)	492	if (req->sv1)
404	{	493	{
405	int i;	494	int i;
406	AV *av = (AV *)req->data;	495	AV *av = (AV *)req->sv1;
407		496
408	EXTEND (SP, AvFILL (av) + 1);	497	EXTEND (SP, AvFILL (av) + 1);
409	for (i = 0; i <= AvFILL (av); ++i)	498	for (i = 0; i <= AvFILL (av); ++i)
410	PUSHs (*av_fetch (av, i, 0));	499	PUSHs (*av_fetch (av, i, 0));
411	}	500	}
412	break;	501	break;
413		502
414	case REQ_NOP:	503	case EIO_NOP:
415	case REQ_BUSY:	504	case EIO_BUSY:
416	break;	505	break;
417		506
		507	case EIO_READLINK:
		508	if (req->result > 0)
		509	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		510	break;
		511
		512	case EIO_STAT:
		513	case EIO_LSTAT:
		514	case EIO_FSTAT:
		515	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		516	PL_laststatval = req->result;
		517	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		518	PUSHs (sv_result);
		519	break;
		520
		521	case EIO_READ:
		522	{
		523	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		524	*SvEND (req->sv2) = 0;
		525	SvPOK_only (req->sv2);
		526	SvSETMAGIC (req->sv2);
		527	PUSHs (sv_result);
		528	}
		529	break;
		530
		531	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		532	if (req->result > 0)
		533	SvIV_set (sv_result, 0);
		534	/* FALLTHROUGH */
		535
418	default:	536	default:
419	PUSHs (sv_2mortal (newSViv (req->result)));	537	PUSHs (sv_result);
420	break;	538	break;
421	}	539	}
422		540
		541	errno = req->errorno;
423		542
424	PUTBACK;	543	PUTBACK;
425	call_sv (req->callback, G_VOID | G_EVAL);	544	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
426	SPAGAIN;	545	SPAGAIN;
		546
		547	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		548	SvREFCNT_dec (sv_result);
		549	else
		550	sv_result_cache = sv_result;
427		551
428	FREETMPS;	552	FREETMPS;
429	LEAVE;	553	LEAVE;
		554
		555	PUTBACK;
430	}	556	}
431		557
432	if (req->grp)	558	return !!SvTRUE (ERRSV);
433	{
434	aio_req grp = req->grp;
435
436	/* unlink request */
437	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
438	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
439
440	if (grp->grp_first == req)
441	grp->grp_first = req->grp_next;
442
443	aio_grp_dec (grp);
444	}
445
446	if (SvTRUE (ERRSV))
447	{
448	req_free (req);
449	croak (0);
450	}
451	}	559	}
452		560
453	static void req_free (aio_req req)	561	static void req_destroy (aio_req req)
454	{	562	{
455	if (req->self)	563	if (req->self)
456	{	564	{
457	sv_unmagic (req->self, PERL_MAGIC_ext);	565	sv_unmagic (req->self, PERL_MAGIC_ext);
458	SvREFCNT_dec (req->self);	566	SvREFCNT_dec (req->self);
459	}	567	}
460		568
461	SvREFCNT_dec (req->data);
462	SvREFCNT_dec (req->fh);	569	SvREFCNT_dec (req->sv1);
463	SvREFCNT_dec (req->fh2);	570	SvREFCNT_dec (req->sv2);
464	SvREFCNT_dec (req->callback);	571	SvREFCNT_dec (req->callback);
465	Safefree (req->statdata);
466
467	if (req->type == REQ_READDIR)
468	free (req->data2ptr);
469		572
470	Safefree (req);	573	Safefree (req);
471	}	574	}
472		575
473	static void req_cancel (aio_req req)	576	static void req_cancel_subs (aio_req grp)
474	{	577	{
475	req->flags |= FLAG_CANCELLED;	578	aio_req sub;
476		579
477	if (req->type == REQ_GROUP)	580	if (grp->type != EIO_GROUP)
		581	return;
		582
		583	SvREFCNT_dec (grp->sv2);
		584	grp->sv2 = 0;
		585
		586	eio_grp_cancel (grp);
		587	}
		588
		589	static void
		590	create_respipe (void)
		591	{
		592	if (s_epipe_renew (&respipe))
		593	croak ("IO::AIO: unable to initialize result pipe");
		594	}
		595
		596	static void poll_wait (void)
		597	{
		598	while (eio_nreqs ())
478	{	599	{
479	aio_req sub;	600	int size;
480		601
481	for (sub = req->grp_first; sub; sub = sub->grp_next)	602	X_LOCK (reslock);
482	req_cancel (sub);	603	size = res_queue.size;
		604	X_UNLOCK (reslock);
		605
		606	if (size)
		607	return;
		608
		609	etp_maybe_start_thread ();
		610
		611	s_epipe_wait (&respipe);
483	}	612	}
484	}	613	}
485		614
486	static int poll_cb ()	615	static int poll_cb (void)
487	{	616	{
488	dSP;
489	int count = 0;
490	int do_croak = 0;
491	aio_req req;
492
493	for (;;)	617	for (;;)
494	{	618	{
495	LOCK (reslock);	619	int res = eio_poll ();
496	req = reqq_shift (&res_queue);
497		620
498	if (req)	621	if (res > 0)
499	{
500	if (!res_queue.size)
501	{
502	/* read any signals sent by the worker threads */
503	char buf [32];
504	while (read (respipe [0], buf, 32) == 32)
505	;
506	}
507	}
508
509	UNLOCK (reslock);
510
511	if (!req)
512	break;	622	croak (0);
513		623
514	--nreqs;	624	if (!max_outstanding || max_outstanding > eio_nreqs ())
		625	return res;
515		626
516	if (req->type == REQ_QUIT)	627	poll_wait ();
517	started--;
518	else if (req->type == REQ_GROUP && req->length)
519	{
520	req->fd = 1; /* mark request as delayed */
521	continue;
522	}
523	else
524	{
525	if (req->type == REQ_READ)
526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
527
528	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529	SvREADONLY_off (req->data);
530
531	if (req->statdata)
532	{
533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
534	PL_laststatval = req->result;
535	PL_statcache = *(req->statdata);
536	}
537
538	req_invoke (req);
539
540	count++;
541	}
542
543	req_free (req);
544	}	628	}
545
546	return count;
547	}	629	}
548		630
549	static void *aio_proc(void *arg);
550
551	static void start_thread (void)	631	static void atfork_child (void)
552	{	632	{
553	worker *wrk = calloc (1, sizeof (worker));	633	create_respipe ();
554
555	if (!wrk)
556	croak ("unable to allocate worker thread data");
557
558	sigset_t fullsigset, oldsigset;
559	pthread_attr_t attr;
560
561	pthread_attr_init (&attr);
562	pthread_attr_setstacksize (&attr, STACKSIZE);
563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
564
565	sigfillset (&fullsigset);
566
567	LOCK (wrklock);
568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
569
570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
571	{
572	wrk->prev = &wrk_first;
573	wrk->next = wrk_first.next;
574	wrk_first.next->prev = wrk;
575	wrk_first.next = wrk;
576	started++;
577	}
578	else
579	free (wrk);
580
581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
582	UNLOCK (wrklock);
583	}
584
585	static void req_send (aio_req req)
586	{
587	while (started < wanted && nreqs >= started)
588	start_thread ();
589
590	++nreqs;
591
592	LOCK (reqlock);
593	reqq_push (&req_queue, req);
594	pthread_cond_signal (&reqwait);
595	UNLOCK (reqlock);
596
597	if (nreqs > max_outstanding)
598	for (;;)
599	{
600	poll_cb ();
601
602	if (nreqs <= max_outstanding)
603	break;
604
605	poll_wait ();
606	}
607	}
608
609	static void end_thread (void)
610	{
611	aio_req req;
612
613	Newz (0, req, 1, aio_cb);
614
615	req->type = REQ_QUIT;
616	req->pri = PRI_MAX + PRI_BIAS;
617
618	req_send (req);
619	}
620
621	static void min_parallel (int nthreads)
622	{
623	if (wanted < nthreads)
624	wanted = nthreads;
625	}
626
627	static void max_parallel (int nthreads)
628	{
629	int cur = started;
630
631	if (wanted > nthreads)
632	wanted = nthreads;
633
634	while (cur > wanted)
635	{
636	end_thread ();
637	cur--;
638	}
639
640	while (started > wanted)
641	{
642	poll_wait ();
643	poll_cb ();
644	}
645	}
646
647	static void create_pipe ()
648	{
649	if (pipe (respipe))
650	croak ("unable to initialize result pipe");
651
652	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
653	croak ("cannot set result pipe to nonblocking mode");
654
655	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
656	croak ("cannot set result pipe to nonblocking mode");
657	}	634	}
658		635
659	/*****************************************************************************/	636	/*****************************************************************************/
660	/* work around various missing functions */
661		637
662	#if !HAVE_PREADWRITE	638	#if !_POSIX_MAPPED_FILES
663	# define pread aio_pread	639	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
664	# define pwrite aio_pwrite	640	# define munmap(addr,length) (errno = ENOSYS, -1)
665		641	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
666	/*	642	# define PROT_NONE 0
667	* make our pread/pwrite safe against themselves, but not against	643	# define PROT_WRITE 0
668	* normal read/write by using a mutex. slows down execution a lot,	644	# define MAP_PRIVATE 0
669	* but that's your problem, not mine.	645	# define MAP_SHARED 0
670	*/	646	# define MAP_FIXED 0
671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
672
673	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
674	{
675	ssize_t res;
676	off_t ooffset;
677
678	LOCK (preadwritelock);
679	ooffset = lseek (fd, 0, SEEK_CUR);
680	lseek (fd, offset, SEEK_SET);
681	res = read (fd, buf, count);
682	lseek (fd, ooffset, SEEK_SET);
683	UNLOCK (preadwritelock);
684
685	return res;
686	}
687
688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
689	{
690	ssize_t res;
691	off_t ooffset;
692
693	LOCK (preadwritelock);
694	ooffset = lseek (fd, 0, SEEK_CUR);
695	lseek (fd, offset, SEEK_SET);
696	res = write (fd, buf, count);
697	lseek (fd, offset, SEEK_SET);
698	UNLOCK (preadwritelock);
699
700	return res;
701	}
702	#endif
703
704	#if !HAVE_FDATASYNC
705	# define fdatasync fsync
706	#endif
707
708	#if !HAVE_READAHEAD
709	# define readahead aio_readahead
710
711	static ssize_t readahead (int fd, off_t offset, size_t count)
712	{
713	dBUF;
714
715	while (count > 0)
716	{
717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
718
719	pread (fd, aio_buf, len, offset);
720	offset += len;
721	count -= len;
722	}
723
724	errno = 0;
725	}
726	#endif
727
728	#if !HAVE_READDIR_R
729	# define readdir_r aio_readdir_r
730
731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
732
733	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
734	{
735	struct dirent *e;
736	int errorno;
737
738	LOCK (readdirlock);
739
740	e = readdir (dirp);
741	errorno = errno;
742
743	if (e)
744	{
745	*res = ent;
746	strcpy (ent->d_name, e->d_name);
747	}
748	else
749	*res = 0;
750
751	UNLOCK (readdirlock);
752
753	errno = errorno;
754	return e ? 0 : -1;
755	}
756	#endif
757
758	/* sendfile always needs emulation */
759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
760	{
761	ssize_t res;
762
763	if (!count)
764	return 0;
765
766	#if HAVE_SENDFILE
767	# if __linux
768	res = sendfile (ofd, ifd, &offset, count);
769
770	# elif __freebsd
771	/*
772	* Of course, the freebsd sendfile is a dire hack with no thoughts
773	* wasted on making it similar to other I/O functions.
774	*/
775	{
776	off_t sbytes;
777	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778
779	if (res < 0 && sbytes)
780	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
781	res = sbytes;
782	}
783
784	# elif __hpux
785	res = sendfile (ofd, ifd, offset, count, 0, 0);
786
787	# elif __solaris
788	{
789	struct sendfilevec vec;
790	size_t sbytes;
791
792	vec.sfv_fd = ifd;
793	vec.sfv_flag = 0;
794	vec.sfv_off = offset;
795	vec.sfv_len = count;
796
797	res = sendfilev (ofd, &vec, 1, &sbytes);
798
799	if (res < 0 && sbytes)
800	res = sbytes;
801	}
802
803	# endif	647	#endif
804	#else
805	res = -1;
806	errno = ENOSYS;
807	#endif
808		648
809	if (res < 0	649	#define MMAP_MAGIC PERL_MAGIC_ext
810	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
811	#if __solaris
812	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
813	#endif
814	)
815	)
816	{
817	/* emulate sendfile. this is a major pain in the ass */
818	dBUF;
819		650
820	res = 0;	651	static int
		652	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		653	{
		654	int old_errno = errno;
		655	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		656	errno = old_errno;
821		657
822	while (count)	658	mg->mg_obj = 0; /* just in case */
823	{
824	ssize_t cnt;
825
826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
827		659
828	if (cnt <= 0)	660	SvREADONLY_off (sv);
829	{
830	if (cnt && !res) res = -1;
831	break;
832	}
833		661
834	cnt = write (ofd, aio_buf, cnt);	662	if (SvPVX (sv) != mg->mg_ptr)
		663	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
835		664
836	if (cnt <= 0)	665	SvCUR_set (sv, 0);
837	{	666	SvPVX (sv) = 0;
838	if (cnt && !res) res = -1;	667	SvOK_off (sv);
839	break;
840	}
841		668
842	offset += cnt;
843	res += cnt;
844	count -= cnt;
845	}
846	}
847
848	return res;	669	return 0;
849	}	670	}
850		671
851	/* read a full directory */	672	static MGVTBL mmap_vtbl = {
852	static void scandir_ (aio_req req, worker *self)	673	0, 0, 0, 0, mmap_free
853	{	674	};
854	DIR *dirp;
855	union
856	{
857	struct dirent d;
858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
859	} *u;
860	struct dirent *entp;
861	char *name, *names;
862	int memlen = 4096;
863	int memofs = 0;
864	int res = 0;
865	int errorno;
866
867	LOCK (wrklock);
868	self->dirp = dirp = opendir (req->dataptr);
869	self->dbuf = u = malloc (sizeof (*u));
870	UNLOCK (wrklock);
871
872	req->data2ptr = names = malloc (memlen);
873
874	if (dirp && u && names)
875	for (;;)
876	{
877	errno = 0;
878	readdir_r (dirp, &u->d, &entp);
879
880	if (!entp)
881	break;
882
883	name = entp->d_name;
884
885	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
886	{
887	int len = strlen (name) + 1;
888
889	res++;
890
891	while (memofs + len > memlen)
892	{
893	memlen *= 2;
894	LOCK (wrklock);
895	req->data2ptr = names = realloc (names, memlen);
896	UNLOCK (wrklock);
897
898	if (!names)
899	break;
900	}
901
902	memcpy (names + memofs, name, len);
903	memofs += len;
904	}
905	}
906
907	if (errno)
908	res = -1;
909
910	req->result = res;
911	}
912		675
913	/*****************************************************************************/	676	/*****************************************************************************/
914		677
915	static void *aio_proc (void *thr_arg)	678	static SV *
		679	get_cb (SV *cb_sv)
916	{	680	{
917	aio_req req;	681	SvGETMAGIC (cb_sv);
918	int type;	682	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
919	worker *self = (worker *)thr_arg;
920
921	do
922	{
923	LOCK (reqlock);
924
925	for (;;)
926	{
927	self->req = req = reqq_shift (&req_queue);
928
929	if (req)
930	break;
931
932	pthread_cond_wait (&reqwait, &reqlock);
933	}
934
935	UNLOCK (reqlock);
936
937	errno = 0; /* strictly unnecessary */
938	type = req->type; /* remember type for QUIT check */
939
940	if (!(req->flags & FLAG_CANCELLED))
941	switch (type)
942	{
943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
945
946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
948
949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
952
953	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
954	case REQ_CLOSE: req->result = close (req->fd); break;
955	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
956	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
957	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
960
961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
962	case REQ_FSYNC: req->result = fsync (req->fd); break;
963	case REQ_READDIR: scandir_ (req, self); break;
964
965	case REQ_BUSY:
966	{
967	struct timeval tv;
968
969	tv.tv_sec = req->fd;
970	tv.tv_usec = req->fd2;
971
972	req->result = select (0, 0, 0, 0, &tv);
973	}
974
975	case REQ_GROUP:
976	case REQ_NOP:
977	case REQ_QUIT:
978	break;
979
980	default:
981	req->result = ENOSYS;
982	break;
983	}
984
985	req->errorno = errno;
986
987	LOCK (reslock);
988
989	if (!reqq_push (&res_queue, req))
990	/* write a dummy byte to the pipe so fh becomes ready */
991	write (respipe [1], &respipe, 1);
992
993	self->req = 0;
994	worker_clear (self);
995
996	UNLOCK (reslock);
997	}
998	while (type != REQ_QUIT);
999
1000	LOCK (wrklock);
1001	worker_free (self);
1002	UNLOCK (wrklock);
1003
1004	return 0;
1005	}
1006
1007	/*****************************************************************************/
1008
1009	static void atfork_prepare (void)
1010	{
1011	LOCK (wrklock);
1012	LOCK (reqlock);
1013	LOCK (reslock);
1014	#if !HAVE_PREADWRITE
1015	LOCK (preadwritelock);
1016	#endif
1017	#if !HAVE_READDIR_R
1018	LOCK (readdirlock);
1019	#endif
1020	}
1021
1022	static void atfork_parent (void)
1023	{
1024	#if !HAVE_READDIR_R
1025	UNLOCK (readdirlock);
1026	#endif
1027	#if !HAVE_PREADWRITE
1028	UNLOCK (preadwritelock);
1029	#endif
1030	UNLOCK (reslock);
1031	UNLOCK (reqlock);
1032	UNLOCK (wrklock);
1033	}
1034
1035	static void atfork_child (void)
1036	{
1037	aio_req prv;
1038
1039	while (prv = reqq_shift (&req_queue))
1040	req_free (prv);
1041
1042	while (prv = reqq_shift (&res_queue))
1043	req_free (prv);
1044
1045	while (wrk_first.next != &wrk_first)
1046	{
1047	worker *wrk = wrk_first.next;
1048
1049	if (wrk->req)
1050	req_free (wrk->req);
1051
1052	worker_clear (wrk);
1053	worker_free (wrk);
1054	}
1055
1056	started = 0;
1057	nreqs = 0;
1058
1059	close (respipe [0]);
1060	close (respipe [1]);
1061	create_pipe ();
1062
1063	atfork_parent ();
1064	}	683	}
1065		684
1066	#define dREQ \	685	#define dREQ \
		686	SV *cb_cv; \
1067	aio_req req; \	687	aio_req req; \
1068	int req_pri = next_pri; \	688	int req_pri = next_pri; \
1069	next_pri = DEFAULT_PRI + PRI_BIAS; \	689	next_pri = EIO_PRI_DEFAULT; \
1070	\	690	\
1071	if (SvOK (callback) && !SvROK (callback)) \	691	cb_cv = get_cb (callback); \
1072	croak ("callback must be undef or of reference type"); \
1073	\	692	\
1074	Newz (0, req, 1, aio_cb); \	693	Newz (0, req, 1, eio_req); \
1075	if (!req) \	694	if (!req) \
1076	croak ("out of memory during aio_req allocation"); \	695	croak ("out of memory during eio_req allocation"); \
1077	\	696	\
1078	req->callback = newSVsv (callback); \	697	req->callback = SvREFCNT_inc (cb_cv); \
1079	req->pri = req_pri	698	req->pri = req_pri
1080		699
1081	#define REQ_SEND \	700	#define REQ_SEND \
		701	PUTBACK; \
1082	req_send (req); \	702	req_submit (req); \
		703	SPAGAIN; \
1083	\	704	\
1084	if (GIMME_V != G_VOID) \	705	if (GIMME_V != G_VOID) \
1085	XPUSHs (req_sv (req, AIO_REQ_KLASS));	706	XPUSHs (req_sv (req, aio_req_stash));
1086		707
1087	MODULE = IO::AIO PACKAGE = IO::AIO	708	MODULE = IO::AIO PACKAGE = IO::AIO
1088		709
1089	PROTOTYPES: ENABLE	710	PROTOTYPES: ENABLE
1090		711
1091	BOOT:	712	BOOT:
1092	{	713	{
		714	static const struct {
		715	const char *name;
		716	IV iv;
		717	} *civ, const_iv[] = {
		718	# define const_niv(name, value) { # name, (IV) value },
		719	# define const_iv(name) { # name, (IV) name },
		720	# define const_eio(name) { # name, (IV) EIO_ ## name },
		721	const_iv (EXDEV)
		722	const_iv (ENOSYS)
		723	const_iv (O_RDONLY)
		724	const_iv (O_WRONLY)
		725	const_iv (O_RDWR)
		726	const_iv (O_CREAT)
		727	const_iv (O_TRUNC)
		728	const_iv (O_EXCL)
		729	const_iv (O_APPEND)
		730	#ifndef _WIN32
		731	const_iv (S_IFIFO)
		732	#endif
		733	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		734	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		735	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		736	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		737	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		738	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		739
		740	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		741	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		742	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		743	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		744	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		745
		746	const_iv (ST_RDONLY)
		747	const_iv (ST_NOSUID)
		748	const_iv (ST_NODEV)
		749	const_iv (ST_NOEXEC)
		750	const_iv (ST_SYNCHRONOUS)
		751	const_iv (ST_MANDLOCK)
		752	const_iv (ST_WRITE)
		753	const_iv (ST_APPEND)
		754	const_iv (ST_IMMUTABLE)
		755	const_iv (ST_NOATIME)
		756	const_iv (ST_NODIRATIME)
		757	const_iv (ST_RELATIME)
		758
		759	const_iv (PROT_NONE)
		760	const_iv (PROT_EXEC)
		761	const_iv (PROT_READ)
		762	const_iv (PROT_WRITE)
		763
		764	/*const_iv (MAP_FIXED)*/
		765	const_iv (MAP_PRIVATE)
		766	const_iv (MAP_SHARED)
		767	const_iv (MAP_ANONYMOUS)
		768
		769	/* linuxish */
		770	const_iv (MAP_HUGETLB)
		771	const_iv (MAP_LOCKED)
		772	const_iv (MAP_NORESERVE)
		773	const_iv (MAP_POPULATE)
		774	const_iv (MAP_NONBLOCK)
		775
		776	const_eio (MCL_FUTURE)
		777	const_eio (MCL_CURRENT)
		778
		779	const_eio (MS_ASYNC)
		780	const_eio (MS_INVALIDATE)
		781	const_eio (MS_SYNC)
		782
		783	const_eio (MT_MODIFY)
		784
		785	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		786	const_eio (SYNC_FILE_RANGE_WRITE)
		787	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		788
		789	const_eio (READDIR_DENTS)
		790	const_eio (READDIR_DIRS_FIRST)
		791	const_eio (READDIR_STAT_ORDER)
		792	const_eio (READDIR_FOUND_UNKNOWN)
		793
		794	const_eio (DT_UNKNOWN)
		795	const_eio (DT_FIFO)
		796	const_eio (DT_CHR)
		797	const_eio (DT_DIR)
		798	const_eio (DT_BLK)
		799	const_eio (DT_REG)
		800	const_eio (DT_LNK)
		801	const_eio (DT_SOCK)
		802	const_eio (DT_WHT)
		803	};
		804
1093	HV *stash = gv_stashpv ("IO::AIO", 1);	805	aio_stash = gv_stashpv ("IO::AIO" , 1);
1094	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	806	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1095	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	807	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1096	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1097		808
		809	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		810	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		811
		812	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		813
1098	create_pipe ();	814	create_respipe ();
1099	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1100	}
1101		815
		816	if (eio_init (want_poll, done_poll) < 0)
		817	croak ("IO::AIO: unable to initialise eio library");
		818
		819	/* atfork child called in fifo order, so before eio's handler */
		820	X_THREAD_ATFORK (0, 0, atfork_child);
		821	}
		822
1102	void	823	void
1103	min_parallel (nthreads)	824	max_poll_reqs (int nreqs)
1104	int nthreads
1105	PROTOTYPE: $	825	PROTOTYPE: $
		826	CODE:
		827	eio_set_max_poll_reqs (nreqs);
1106		828
1107	void	829	void
1108	max_parallel (nthreads)	830	max_poll_time (double nseconds)
1109	int nthreads
1110	PROTOTYPE: $	831	PROTOTYPE: $
1111
1112	int
1113	max_outstanding (nreqs)
1114	int nreqs
1115	PROTOTYPE: $
1116	CODE:	832	CODE:
1117	RETVAL = max_outstanding;	833	eio_set_max_poll_time (nseconds);
		834
		835	void
		836	min_parallel (int nthreads)
		837	PROTOTYPE: $
		838	CODE:
		839	eio_set_min_parallel (nthreads);
		840
		841	void
		842	max_parallel (int nthreads)
		843	PROTOTYPE: $
		844	CODE:
		845	eio_set_max_parallel (nthreads);
		846
		847	void
		848	max_idle (int nthreads)
		849	PROTOTYPE: $
		850	CODE:
		851	eio_set_max_idle (nthreads);
		852
		853	void
		854	max_outstanding (int maxreqs)
		855	PROTOTYPE: $
		856	CODE:
1118	max_outstanding = nreqs;	857	max_outstanding = maxreqs;
1119		858
1120	void	859	void
1121	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	860	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1122	SV * pathname
1123	int flags
1124	int mode
1125	SV * callback
1126	PROTOTYPE: $$$;$
1127	PPCODE:	861	PPCODE:
1128	{	862	{
1129	dREQ;	863	dREQ;
1130		864
1131	req->type = REQ_OPEN;	865	req->type = EIO_OPEN;
1132	req->data = newSVsv (pathname);	866	req->sv1 = newSVsv (pathname);
1133	req->dataptr = SvPVbyte_nolen (req->data);	867	req->ptr1 = SvPVbyte_nolen (req->sv1);
1134	req->fd = flags;	868	req->int1 = flags;
1135	req->mode = mode;	869	req->int2 = mode;
1136		870
1137	REQ_SEND;	871	REQ_SEND;
1138	}	872	}
1139		873
1140	void	874	void
1141	aio_close (fh,callback=&PL_sv_undef)	875	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1142	SV * fh
1143	SV * callback
1144	PROTOTYPE: $;$
1145	ALIAS:	876	ALIAS:
1146	aio_close = REQ_CLOSE
1147	aio_fsync = REQ_FSYNC	877	aio_fsync = EIO_FSYNC
1148	aio_fdatasync = REQ_FDATASYNC	878	aio_fdatasync = EIO_FDATASYNC
1149	PPCODE:	879	PPCODE:
1150	{	880	{
		881	int fd = s_fileno_croak (fh, 0);
1151	dREQ;	882	dREQ;
1152		883
1153	req->type = ix;	884	req->type = ix;
1154	req->fh = newSVsv (fh);	885	req->sv1 = newSVsv (fh);
1155	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	886	req->int1 = fd;
1156		887
1157	REQ_SEND (req);	888	REQ_SEND (req);
1158	}	889	}
1159		890
1160	void	891	void
		892	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		893	PPCODE:
		894	{
		895	int fd = s_fileno_croak (fh, 0);
		896	dREQ;
		897
		898	req->type = EIO_SYNC_FILE_RANGE;
		899	req->sv1 = newSVsv (fh);
		900	req->int1 = fd;
		901	req->offs = offset;
		902	req->size = nbytes;
		903	req->int2 = flags;
		904
		905	REQ_SEND (req);
		906	}
		907
		908	void
		909	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		910	PPCODE:
		911	{
		912	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		913	int fd = s_fileno_croak (fh, 0);
		914	dREQ;
		915
		916	if (close_pipe < 0)
		917	{
		918	int pipefd [2];
		919
		920	if (pipe (pipefd) < 0
		921	|| close (pipefd [1]) < 0
		922	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		923	abort (); /*D*/
		924
		925	close_pipe = pipefd [0];
		926	}
		927
		928	req->type = EIO_DUP2;
		929	req->int1 = close_pipe;
		930	req->sv2 = newSVsv (fh);
		931	req->int2 = fd;
		932
		933	REQ_SEND (req);
		934	}
		935
		936	void
1161	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	937	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1162	SV * fh
1163	UV offset
1164	UV length
1165	SV * data
1166	UV dataoffset
1167	SV * callback
1168	ALIAS:	938	ALIAS:
1169	aio_read = REQ_READ	939	aio_read = EIO_READ
1170	aio_write = REQ_WRITE	940	aio_write = EIO_WRITE
1171	PROTOTYPE: $$$$$;$
1172	PPCODE:	941	PPCODE:
1173	{	942	{
1174	aio_req req;
1175	STRLEN svlen;	943	STRLEN svlen;
		944	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1176	char *svptr = SvPVbyte (data, svlen);	945	char *svptr = SvPVbyte (data, svlen);
1177		946	UV len = SvUV (length);
1178	SvUPGRADE (data, SVt_PV);
1179	SvPOK_on (data);
1180		947
1181	if (dataoffset < 0)	948	if (dataoffset < 0)
1182	dataoffset += svlen;	949	dataoffset += svlen;
1183		950
1184	if (dataoffset < 0 || dataoffset > svlen)	951	if (dataoffset < 0 || dataoffset > svlen)
1185	croak ("data offset outside of string");	952	croak ("dataoffset outside of data scalar");
1186		953
1187	if (ix == REQ_WRITE)	954	if (ix == EIO_WRITE)
1188	{	955	{
1189	/* write: check length and adjust. */	956	/* write: check length and adjust. */
1190	if (length < 0 || length + dataoffset > svlen)	957	if (!SvOK (length) || len + dataoffset > svlen)
1191	length = svlen - dataoffset;	958	len = svlen - dataoffset;
1192	}	959	}
1193	else	960	else
1194	{	961	{
1195	/* read: grow scalar as necessary */	962	/* read: check type and grow scalar as necessary */
		963	SvUPGRADE (data, SVt_PV);
1196	svptr = SvGROW (data, length + dataoffset);	964	svptr = SvGROW (data, len + dataoffset + 1);
1197	}	965	}
1198
1199	if (length < 0)
1200	croak ("length must not be negative");
1201		966
1202	{	967	{
1203	dREQ;	968	dREQ;
1204		969
1205	req->type = ix;	970	req->type = ix;
1206	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
1207	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	972	req->int1 = fd;
1208	: IoOFP (sv_2io (fh)));	973	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1209	req->offset = offset;	974	req->size = len;
1210	req->length = length;
1211	req->data = SvREFCNT_inc (data);	975	req->sv2 = SvREFCNT_inc (data);
1212	req->dataptr = (char *)svptr + dataoffset;	976	req->ptr2 = (char *)svptr + dataoffset;
		977	req->stroffset = dataoffset;
1213		978
1214	if (!SvREADONLY (data))	979	if (!SvREADONLY (data))
1215	{	980	{
1216	SvREADONLY_on (data);	981	SvREADONLY_on (data);
1217	req->data2ptr = (void *)data;	982	req->flags |= FLAG_SV2_RO_OFF;
1218	}	983	}
1219		984
1220	REQ_SEND;	985	REQ_SEND;
1221	}	986	}
1222	}	987	}
1223		988
1224	void	989	void
1225	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	990	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1226	SV * out_fh
1227	SV * in_fh
1228	UV in_offset
1229	UV length
1230	SV * callback
1231	PROTOTYPE: $$$$;$
1232	PPCODE:	991	PPCODE:
1233	{	992	{
		993	SV *data;
		994	dREQ;
		995
		996	req->type = EIO_READLINK;
		997	req->sv1 = newSVsv (path);
		998	req->ptr1 = SvPVbyte_nolen (req->sv1);
		999
		1000	REQ_SEND;
		1001	}
		1002
		1003	void
		1004	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1005	PPCODE:
		1006	{
		1007	int ifd = s_fileno_croak (in_fh , 0);
		1008	int ofd = s_fileno_croak (out_fh, 1);
1234	dREQ;	1009	dREQ;
1235		1010
1236	req->type = REQ_SENDFILE;	1011	req->type = EIO_SENDFILE;
1237	req->fh = newSVsv (out_fh);	1012	req->sv1 = newSVsv (out_fh);
1238	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1013	req->int1 = ofd;
1239	req->fh2 = newSVsv (in_fh);	1014	req->sv2 = newSVsv (in_fh);
1240	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1015	req->int2 = ifd;
1241	req->offset = in_offset;	1016	req->offs = in_offset;
1242	req->length = length;	1017	req->size = length;
1243		1018
1244	REQ_SEND;	1019	REQ_SEND;
1245	}	1020	}
1246		1021
1247	void	1022	void
1248	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1023	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1249	SV * fh
1250	UV offset
1251	IV length
1252	SV * callback
1253	PROTOTYPE: $$$;$
1254	PPCODE:	1024	PPCODE:
1255	{	1025	{
		1026	int fd = s_fileno_croak (fh, 0);
1256	dREQ;	1027	dREQ;
1257		1028
1258	req->type = REQ_READAHEAD;	1029	req->type = EIO_READAHEAD;
1259	req->fh = newSVsv (fh);	1030	req->sv1 = newSVsv (fh);
1260	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1031	req->int1 = fd;
1261	req->offset = offset;	1032	req->offs = offset;
1262	req->length = length;	1033	req->size = length;
1263		1034
1264	REQ_SEND;	1035	REQ_SEND;
1265	}	1036	}
1266		1037
1267	void	1038	void
1268	aio_stat (fh_or_path,callback=&PL_sv_undef)	1039	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1269	SV * fh_or_path
1270	SV * callback
1271	ALIAS:	1040	ALIAS:
1272	aio_stat = REQ_STAT	1041	aio_stat = EIO_STAT
1273	aio_lstat = REQ_LSTAT	1042	aio_lstat = EIO_LSTAT
		1043	aio_statvfs = EIO_STATVFS
1274	PPCODE:	1044	PPCODE:
1275	{	1045	{
1276	dREQ;	1046	dREQ;
1277		1047
1278	New (0, req->statdata, 1, Stat_t);	1048	req->sv1 = newSVsv (fh_or_path);
1279	if (!req->statdata)
1280	{
1281	req_free (req);
1282	croak ("out of memory during aio_req->statdata allocation");
1283	}
1284		1049
1285	if (SvPOK (fh_or_path))	1050	if (SvPOK (req->sv1))
1286	{	1051	{
1287	req->type = ix;	1052	req->type = ix;
1288	req->data = newSVsv (fh_or_path);
1289	req->dataptr = SvPVbyte_nolen (req->data);	1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
1290	}	1054	}
1291	else	1055	else
1292	{	1056	{
1293	req->type = REQ_FSTAT;	1057	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1294	req->fh = newSVsv (fh_or_path);
1295	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1058	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1296	}	1059	}
1297		1060
1298	REQ_SEND;	1061	REQ_SEND;
1299	}	1062	}
1300		1063
1301	void	1064	void
		1065	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1066	PPCODE:
		1067	{
		1068	dREQ;
		1069
		1070	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1071	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1072	req->sv1 = newSVsv (fh_or_path);
		1073
		1074	if (SvPOK (req->sv1))
		1075	{
		1076	req->type = EIO_UTIME;
		1077	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1078	}
		1079	else
		1080	{
		1081	req->type = EIO_FUTIME;
		1082	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1083	}
		1084
		1085	REQ_SEND;
		1086	}
		1087
		1088	void
		1089	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->sv1 = newSVsv (fh_or_path);
		1095	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1096
		1097	if (SvPOK (req->sv1))
		1098	{
		1099	req->type = EIO_TRUNCATE;
		1100	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1101	}
		1102	else
		1103	{
		1104	req->type = EIO_FTRUNCATE;
		1105	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1106	}
		1107
		1108	REQ_SEND;
		1109	}
		1110
		1111	void
		1112	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1113	ALIAS:
		1114	aio_chmod = EIO_CHMOD
		1115	aio_mkdir = EIO_MKDIR
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->int2 = mode;
		1121	req->sv1 = newSVsv (fh_or_path);
		1122
		1123	if (SvPOK (req->sv1))
		1124	{
		1125	req->type = ix;
		1126	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1127	}
		1128	else
		1129	{
		1130	req->type = EIO_FCHMOD;
		1131	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1132	}
		1133
		1134	REQ_SEND;
		1135	}
		1136
		1137	void
		1138	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1139	PPCODE:
		1140	{
		1141	dREQ;
		1142
		1143	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1144	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1145	req->sv1 = newSVsv (fh_or_path);
		1146
		1147	if (SvPOK (req->sv1))
		1148	{
		1149	req->type = EIO_CHOWN;
		1150	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1151	}
		1152	else
		1153	{
		1154	req->type = EIO_FCHOWN;
		1155	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1156	}
		1157
		1158	REQ_SEND;
		1159	}
		1160
		1161	void
		1162	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1163	PPCODE:
		1164	{
		1165	dREQ;
		1166
		1167	req->type = EIO_READDIR;
		1168	req->sv1 = newSVsv (pathname);
		1169	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1170	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1171
		1172	if (flags & EIO_READDIR_DENTS)
		1173	req->int1 |= EIO_READDIR_CUSTOM2;
		1174
		1175	REQ_SEND;
		1176	}
		1177
		1178	void
1302	aio_unlink (pathname,callback=&PL_sv_undef)	1179	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1303	SV * pathname
1304	SV * callback
1305	ALIAS:	1180	ALIAS:
1306	aio_unlink = REQ_UNLINK	1181	aio_unlink = EIO_UNLINK
1307	aio_rmdir = REQ_RMDIR	1182	aio_rmdir = EIO_RMDIR
1308	aio_readdir = REQ_READDIR	1183	aio_readdir = EIO_READDIR
1309	PPCODE:	1184	PPCODE:
1310	{	1185	{
1311	dREQ;	1186	dREQ;
1312		1187
1313	req->type = ix;	1188	req->type = ix;
1314	req->data = newSVsv (pathname);	1189	req->sv1 = newSVsv (pathname);
1315	req->dataptr = SvPVbyte_nolen (req->data);	1190	req->ptr1 = SvPVbyte_nolen (req->sv1);
1316		1191
1317	REQ_SEND;	1192	REQ_SEND;
1318	}	1193	}
1319		1194
1320	void	1195	void
1321	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1196	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1322	SV * oldpath
1323	SV * newpath
1324	SV * callback
1325	ALIAS:	1197	ALIAS:
1326	aio_link = REQ_LINK	1198	aio_link = EIO_LINK
1327	aio_symlink = REQ_SYMLINK	1199	aio_symlink = EIO_SYMLINK
1328	aio_rename = REQ_RENAME	1200	aio_rename = EIO_RENAME
1329	PPCODE:	1201	PPCODE:
1330	{	1202	{
1331	dREQ;	1203	dREQ;
1332		1204
1333	req->type = ix;	1205	req->type = ix;
1334	req->fh = newSVsv (oldpath);	1206	req->sv1 = newSVsv (oldpath);
1335	req->data2ptr = SvPVbyte_nolen (req->fh);	1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1336	req->data = newSVsv (newpath);	1208	req->sv2 = newSVsv (newpath);
1337	req->dataptr = SvPVbyte_nolen (req->data);	1209	req->ptr2 = SvPVbyte_nolen (req->sv2);
1338		1210
1339	REQ_SEND;	1211	REQ_SEND;
1340	}	1212	}
1341		1213
1342	void	1214	void
1343	aio_busy (delay,callback=&PL_sv_undef)	1215	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1344	double delay
1345	SV * callback
1346	PPCODE:	1216	PPCODE:
1347	{	1217	{
1348	dREQ;	1218	dREQ;
1349		1219
1350	req->type = REQ_BUSY;	1220	req->type = EIO_MKNOD;
1351	req->fd = delay < 0. ? 0 : delay;	1221	req->sv1 = newSVsv (pathname);
1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1222	req->ptr1 = SvPVbyte_nolen (req->sv1);
1353		1223	req->int2 = (mode_t)mode;
		1224	req->offs = dev;
		1225
1354	REQ_SEND;	1226	REQ_SEND;
1355	}	1227	}
1356		1228
1357	void	1229	void
1358	aio_group (callback=&PL_sv_undef)	1230	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1359	SV * callback	1231	ALIAS:
1360	PROTOTYPE: ;$	1232	aio_mtouch = EIO_MTOUCH
		1233	aio_msync = EIO_MSYNC
1361	PPCODE:	1234	PPCODE:
1362	{	1235	{
		1236	STRLEN svlen;
		1237	char *svptr = SvPVbyte (data, svlen);
		1238	UV len = SvUV (length);
		1239
		1240	if (offset < 0)
		1241	offset += svlen;
		1242
		1243	if (offset < 0 || offset > svlen)
		1244	croak ("offset outside of scalar");
		1245
		1246	if (!SvOK (length) || len + offset > svlen)
		1247	len = svlen - offset;
		1248
		1249	{
		1250	dREQ;
		1251
		1252	req->type = ix;
		1253	req->sv2 = SvREFCNT_inc (data);
		1254	req->ptr2 = (char *)svptr + offset;
		1255	req->size = len;
		1256	req->int1 = flags;
		1257
		1258	REQ_SEND;
		1259	}
		1260	}
		1261
		1262	void
		1263	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1264	PPCODE:
		1265	{
		1266	STRLEN svlen;
		1267	char *svptr = SvPVbyte (data, svlen);
		1268	UV len = SvUV (length);
		1269
		1270	if (offset < 0)
		1271	offset += svlen;
		1272
		1273	if (offset < 0 || offset > svlen)
		1274	croak ("offset outside of scalar");
		1275
		1276	if (!SvOK (length) || len + offset > svlen)
		1277	len = svlen - offset;
		1278
		1279	{
		1280	dREQ;
		1281
		1282	req->type = EIO_MLOCK;
		1283	req->sv2 = SvREFCNT_inc (data);
		1284	req->ptr2 = (char *)svptr + offset;
		1285	req->size = len;
		1286
		1287	REQ_SEND;
		1288	}
		1289	}
		1290
		1291	void
		1292	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1293	PPCODE:
		1294	{
		1295	dREQ;
		1296
		1297	req->type = EIO_MLOCKALL;
		1298	req->int1 = flags;
		1299
		1300	REQ_SEND;
		1301	}
		1302
		1303	void
		1304	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1305	PPCODE:
		1306	{
1363	dREQ;	1307	dREQ;
1364		1308
		1309	req->type = EIO_BUSY;
		1310	req->nv1 = delay < 0. ? 0. : delay;
		1311
		1312	REQ_SEND;
		1313	}
		1314
		1315	void
		1316	aio_group (SV *callback=&PL_sv_undef)
		1317	PPCODE:
		1318	{
		1319	dREQ;
		1320
1365	req->type = REQ_GROUP;	1321	req->type = EIO_GROUP;
		1322
1366	req_send (req);	1323	req_submit (req);
1367
1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1324	XPUSHs (req_sv (req, aio_grp_stash));
1369	}	1325	}
1370		1326
1371	void	1327	void
1372	aio_nop (callback=&PL_sv_undef)	1328	aio_nop (SV *callback=&PL_sv_undef)
1373	SV * callback	1329	ALIAS:
		1330	aio_nop = EIO_NOP
		1331	aio_sync = EIO_SYNC
1374	PPCODE:	1332	PPCODE:
1375	{	1333	{
1376	dREQ;	1334	dREQ;
1377		1335
1378	req->type = REQ_NOP;	1336	req->type = ix;
1379		1337
1380	REQ_SEND;	1338	REQ_SEND;
1381	}	1339	}
1382		1340
1383	void	1341	int
1384	aioreq_pri (int pri = DEFAULT_PRI)	1342	aioreq_pri (int pri = 0)
1385	CODE:	1343	CODE:
		1344	RETVAL = next_pri;
		1345	if (items > 0)
		1346	{
1386	if (pri < PRI_MIN) pri = PRI_MIN;	1347	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1387	if (pri > PRI_MAX) pri = PRI_MAX;	1348	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1388	next_pri = pri + PRI_BIAS;	1349	next_pri = pri;
		1350	}
		1351	OUTPUT:
		1352	RETVAL
1389		1353
1390	void	1354	void
1391	aioreq_nice (int nice = 0)	1355	aioreq_nice (int nice = 0)
1392	CODE:	1356	CODE:
1393	nice = next_pri - nice;	1357	nice = next_pri - nice;
1394	if (nice < PRI_MIN) nice = PRI_MIN;	1358	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1395	if (nice > PRI_MAX) nice = PRI_MAX;	1359	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1396	next_pri = nice + PRI_BIAS;	1360	next_pri = nice;
1397		1361
1398	void	1362	void
1399	flush ()	1363	flush ()
1400	PROTOTYPE:
1401	CODE:	1364	CODE:
1402	while (nreqs)	1365	while (eio_nreqs ())
1403	{	1366	{
1404	poll_wait ();	1367	poll_wait ();
1405	poll_cb ();	1368	poll_cb ();
1406	}	1369	}
1407		1370
1408	void	1371	int
1409	poll()	1372	poll ()
1410	PROTOTYPE:
1411	CODE:	1373	CODE:
1412	if (nreqs)
1413	{
1414	poll_wait ();	1374	poll_wait ();
1415	poll_cb ();	1375	RETVAL = poll_cb ();
1416	}
1417
1418	int
1419	poll_fileno()
1420	PROTOTYPE:
1421	CODE:
1422	RETVAL = respipe [0];
1423	OUTPUT:	1376	OUTPUT:
1424	RETVAL	1377	RETVAL
1425		1378
1426	int	1379	int
		1380	poll_fileno ()
		1381	CODE:
		1382	RETVAL = s_epipe_fd (&respipe);
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
1427	poll_cb(...)	1387	poll_cb (...)
1428	PROTOTYPE:	1388	PROTOTYPE:
1429	CODE:	1389	CODE:
1430	RETVAL = poll_cb ();	1390	RETVAL = poll_cb ();
1431	OUTPUT:	1391	OUTPUT:
1432	RETVAL	1392	RETVAL
1433		1393
1434	void	1394	void
1435	poll_wait()	1395	poll_wait ()
1436	PROTOTYPE:
1437	CODE:	1396	CODE:
1438	if (nreqs)
1439	poll_wait ();	1397	poll_wait ();
1440		1398
1441	int	1399	int
1442	nreqs()	1400	nreqs ()
1443	PROTOTYPE:
1444	CODE:	1401	CODE:
1445	RETVAL = nreqs;	1402	RETVAL = eio_nreqs ();
1446	OUTPUT:	1403	OUTPUT:
1447	RETVAL	1404	RETVAL
1448		1405
		1406	int
		1407	nready ()
		1408	CODE:
		1409	RETVAL = eio_nready ();
		1410	OUTPUT:
		1411	RETVAL
		1412
		1413	int
		1414	npending ()
		1415	CODE:
		1416	RETVAL = eio_npending ();
		1417	OUTPUT:
		1418	RETVAL
		1419
		1420	int
		1421	nthreads ()
		1422	CODE:
		1423	RETVAL = eio_nthreads ();
		1424	OUTPUT:
		1425	RETVAL
		1426
		1427	int
		1428	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1429	CODE:
		1430	RETVAL = posix_fadvise (fh, offset, length, advice);
		1431	OUTPUT:
		1432	RETVAL
		1433
		1434	ssize_t
		1435	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1436	CODE:
		1437	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1438	OUTPUT:
		1439	RETVAL
		1440
		1441	void
		1442	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1443	PPCODE:
		1444	sv_unmagic (scalar, MMAP_MAGIC);
		1445	{
		1446	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1447	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1448	if (addr == (void *)-1)
		1449	XSRETURN_NO;
		1450
		1451	sv_force_normal (scalar);
		1452
		1453	/* we store the length in mg_obj, as namlen is I32 :/ */
		1454	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1455	->mg_obj = (SV *)length;
		1456
		1457	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1458
		1459	if (!(prot & PROT_WRITE))
		1460	SvREADONLY_on (scalar);
		1461
		1462	if (SvLEN (scalar))
		1463	Safefree (SvPVX (scalar));
		1464
		1465	SvPVX (scalar) = (char *)addr;
		1466	SvCUR_set (scalar, length);
		1467	SvLEN_set (scalar, 0);
		1468	SvPOK_only (scalar);
		1469
		1470	XSRETURN_YES;
		1471	}
		1472
		1473	void
		1474	munmap (SV *scalar)
		1475	CODE:
		1476	sv_unmagic (scalar, MMAP_MAGIC);
		1477
		1478	int
		1479	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1480	ALIAS:
		1481	mprotect = 1
		1482	CODE:
		1483	{
		1484	STRLEN svlen;
		1485	void *addr = SvPVbyte (scalar, svlen);
		1486	size_t len = SvUV (length);
		1487
		1488	if (offset < 0)
		1489	offset += svlen;
		1490
		1491	if (offset < 0 || offset > svlen)
		1492	croak ("offset outside of scalar");
		1493
		1494	if (!SvOK (length) || len + offset > svlen)
		1495	len = svlen - offset;
		1496
		1497	addr = (void *)(((intptr_t)addr) + offset);
		1498	eio_page_align (&addr, &len);
		1499
		1500	switch (ix)
		1501	{
		1502	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1503	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1504	}
		1505	}
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	int
		1510	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1511	CODE:
		1512	{
		1513	STRLEN svlen;
		1514	void *addr = SvPVbyte (scalar, svlen);
		1515	size_t len = SvUV (length);
		1516
		1517	if (offset < 0)
		1518	offset += svlen;
		1519
		1520	if (offset < 0 || offset > svlen)
		1521	croak ("offset outside of scalar");
		1522
		1523	if (!SvOK (length) || len + offset > svlen)
		1524	len = svlen - offset;
		1525
		1526	addr = (void *)(((intptr_t)addr) + offset);
		1527	eio_page_align (&addr, &len);
		1528	#if _POSIX_MEMLOCK
		1529	RETVAL = munlock (addr, len);
		1530	#else
		1531	RETVAL = ((errno = ENOSYS), -1);
		1532	#endif
		1533	}
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
		1538	munlockall ()
		1539	CODE:
		1540	#if _POSIX_MEMLOCK
		1541	munlockall ();
		1542	#else
		1543	RETVAL = -1;
		1544	errno = ENOSYS;
		1545	#endif
		1546	OUTPUT:
		1547	RETVAL
		1548
		1549	void _on_next_submit (SV *cb)
		1550	CODE:
		1551	SvREFCNT_dec (on_next_submit);
		1552	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1553
1449	PROTOTYPES: DISABLE	1554	PROTOTYPES: DISABLE
1450		1555
1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1556	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452		1557
1453	void	1558	void
1454	cancel (aio_req_ornot req)	1559	cancel (aio_req_ornot req)
1455	CODE:	1560	CODE:
1456	req_cancel (req);	1561	eio_cancel (req);
1457		1562
1458	void	1563	void
1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1564	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1460	CODE:	1565	PPCODE:
		1566	{
		1567	if (GIMME_V != G_VOID)
		1568	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1569
		1570	if (items > 1)
		1571	{
		1572	SV *cb_cv =get_cb (callback);
		1573
1461	SvREFCNT_dec (req->callback);	1574	SvREFCNT_dec (req->callback);
1462	req->callback = newSVsv (callback);	1575	req->callback = SvREFCNT_inc (cb_cv);
		1576	}
		1577	}
1463		1578
1464	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1579	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1465		1580
1466	void	1581	void
1467	add (aio_req grp, ...)	1582	add (aio_req grp, ...)
1468	PPCODE:	1583	PPCODE:
1469	{	1584	{
1470	int i;	1585	int i;
1471	aio_req req;
1472		1586
1473	if (grp->fd == 2)	1587	if (grp->int1 == 2)
1474	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1588	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1475		1589
1476	for (i = 1; i < items; ++i )	1590	for (i = 1; i < items; ++i )
1477	{	1591	{
		1592	aio_req req;
		1593
1478	if (GIMME_V != G_VOID)	1594	if (GIMME_V != G_VOID)
1479	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1595	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1480		1596
1481	req = SvAIO_REQ (ST (i));	1597	req = SvAIO_REQ (ST (i));
1482		1598
1483	if (req)	1599	if (req)
1484	{	1600	eio_grp_add (grp, req);
1485	++grp->length;
1486	req->grp = grp;
1487
1488	req->grp_prev = 0;
1489	req->grp_next = grp->grp_first;
1490
1491	if (grp->grp_first)
1492	grp->grp_first->grp_prev = req;
1493
1494	grp->grp_first = req;
1495	}
1496	}	1601	}
1497	}	1602	}
		1603
		1604	void
		1605	cancel_subs (aio_req_ornot req)
		1606	CODE:
		1607	req_cancel_subs (req);
1498		1608
1499	void	1609	void
1500	result (aio_req grp, ...)	1610	result (aio_req grp, ...)
1501	CODE:	1611	CODE:
1502	{	1612	{
1503	int i;	1613	int i;
		1614	AV *av;
		1615
		1616	grp->errorno = errno;
		1617
1504	AV *av = newAV ();	1618	av = newAV ();
		1619	av_extend (av, items - 1);
1505		1620
1506	for (i = 1; i < items; ++i )	1621	for (i = 1; i < items; ++i )
1507	av_push (av, newSVsv (ST (i)));	1622	av_push (av, newSVsv (ST (i)));
1508		1623
1509	SvREFCNT_dec (grp->data);	1624	SvREFCNT_dec (grp->sv1);
1510	grp->data = (SV *)av;	1625	grp->sv1 = (SV *)av;
1511	}	1626	}
		1627
		1628	void
		1629	errno (aio_req grp, int errorno = errno)
		1630	CODE:
		1631	grp->errorno = errorno;
1512		1632
1513	void	1633	void
1514	limit (aio_req grp, int limit)	1634	limit (aio_req grp, int limit)
1515	CODE:	1635	CODE:
1516	grp->fd2 = limit;	1636	eio_grp_limit (grp, limit);
1517	aio_grp_feed (grp);
1518		1637
1519	void	1638	void
1520	feed (aio_req grp, SV *callback=&PL_sv_undef)	1639	feed (aio_req grp, SV *callback=&PL_sv_undef)
1521	CODE:	1640	CODE:
1522	{	1641	{
1523	SvREFCNT_dec (grp->fh2);	1642	SvREFCNT_dec (grp->sv2);
1524	grp->fh2 = newSVsv (callback);	1643	grp->sv2 = newSVsv (callback);
		1644	grp->feed = aio_grp_feed;
1525		1645
1526	if (grp->fd2 <= 0)	1646	if (grp->int2 <= 0)
1527	grp->fd2 = 2;	1647	grp->int2 = 2;
1528		1648
1529	aio_grp_feed (grp);	1649	eio_grp_limit (grp, grp->int2);
1530	}	1650	}
1531		1651

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