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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC vs.
Revision 1.171 by root, Wed Aug 4 17:16:19 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
26	#include <limits.h>	17	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	18	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	19	#include <sched.h>
31		20
32	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>	22	# include <sys/mman.h>
35	# elif __freebsd	23	#endif
36	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
37	# include <sys/uio.h>	68	# include <sys/time.h>
38	# elif __hpux
39	# include <sys/socket.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if _XOPEN_SOURCE < 600 || NO_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef PROT_NONE
		171	# define PROT_NONE 0
		172	#endif
		173	#ifndef PROT_READ
		174	# define PROT_READ 0
		175	#endif
		176	#ifndef PROT_WRITE
		177	# define PROT_READ 0
		178	#endif
		179	#ifndef PROT_EXEC
		180	# define PROT_EXEC 0
		181	#endif
		182
		183	#ifndef ST_NODEV
		184	# define ST_NODEV 0
		185	#endif
		186	#ifndef ST_NOEXEC
		187	# define ST_NOEXEC 0
		188	#endif
		189	#ifndef ST_SYNCHRONOUS
		190	# define ST_SYNCHRONOUS 0
		191	#endif
		192	#ifndef ST_MANDLOCK
		193	# define ST_MANDLOCK 0
		194	#endif
		195	#ifndef ST_WRITE
		196	# define ST_WRITE 0
		197	#endif
		198	#ifndef ST_APPEND
		199	# define ST_APPEND 0
		200	#endif
		201	#ifndef ST_IMMUTABLE
		202	# define ST_IMMUTABLE 0
		203	#endif
		204	#ifndef ST_NOATIME
		205	# define ST_NOATIME 0
		206	#endif
		207	#ifndef ST_NODIRATIME
		208	# define ST_NODIRATIME 0
		209	#endif
		210	#ifndef ST_RELATIME
		211	# define ST_RELATIME 0
		212	#endif
		213
		214	#ifndef MCL_CURRENT
		215	# define MCL_CURRENT 0
		216	#endif
		217	#ifndef MCL_FUTURE
		218	# define MCL_FUTURE 0
		219	#endif
		220
		221	#ifndef MAP_ANONYMOUS
		222	# ifdef MAP_ANON
		223	# define MAP_ANONYMOUS MAP_ANON
42	# else	224	# else
43	# error sendfile support requested but not available	225	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	226	# endif
45	#endif	227	#endif
46		228	#ifndef MAP_HUGETLB
47	/* used for struct dirent, AIX doesn't provide it */	229	# define MAP_HUGETLB 0
48	#ifndef NAME_MAX
49	# define NAME_MAX 4096
50	#endif	230	#endif
51		231	#ifndef MAP_LOCKED
52	#if __ia64	232	# 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	233	#endif
		234	#ifndef MAP_NORESERVE
		235	# define MAP_NORESERVE 0
		236	#endif
		237	#ifndef MAP_POPULATE
		238	# define MAP_POPULATE 0
		239	#endif
		240	#ifndef MAP_NONBLOCK
		241	# define MAP_NONBLOCK 0
		242	#endif
59		243
60	/* buffer size for various temporary buffers */	244	#ifndef PAGESIZE
61	#define AIO_BUFSIZE 65536	245	# define PAGESIZE sysconf (_SC_PAGESIZE)
		246	#endif
62		247
63	#define dBUF \	248	static int req_invoke (eio_req *req);
64	char *aio_buf; \	249	#define EIO_FINISH(req) req_invoke (req)
65	LOCK (wrklock); \	250	static void req_destroy (eio_req *grp);
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	251	#define EIO_DESTROY(req) req_destroy (req)
67	UNLOCK (wrklock); \
68	if (!aio_buf) \
69	return -1;
70		252
71	enum {	253	enum {
72	REQ_QUIT,	254	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	};	255	};
84		256
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	257	#include "libeio/eio.c"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		258
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;	259	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	260	typedef eio_req *aio_req_ornot;
119		261
120	enum {	262	static SV *on_next_submit;
121	PRI_MIN = -4,	263	static int next_pri = EIO_PRI_DEFAULT;
122	PRI_MAX = 4,	264	static int max_outstanding;
123		265
124	DEFAULT_PRI = 0,	266	static s_epipe respipe;
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128		267
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{
165	closedir (wrk->dirp);
166	wrk->dirp = 0;
167	}
168
169	if (wrk->dbuf)
170	{
171	free (wrk->dbuf);
172	wrk->dbuf = 0;
173	}
174	}
175
176	static void worker_free (worker *wrk)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;
223
224	--q->size;
225
226	for (pri = NUM_PRI; pri--; )
227	{
228	aio_req req = q->qs[pri];
229
230	if (req)
231	{
232	if (!(q->qs[pri] = req->next))
233	q->qe[pri] = 0;
234
235	return req;
236	}
237	}
238
239	abort ();
240	}
241
242	static int poll_cb ();
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	268	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	269	static void req_cancel (aio_req req);
246		270
		271	static void want_poll (void)
		272	{
		273	/* write a dummy byte to the pipe so fh becomes ready */
		274	s_epipe_signal (&respipe);
		275	}
		276
		277	static void done_poll (void)
		278	{
		279	/* read any signals sent by the worker threads */
		280	s_epipe_drain (&respipe);
		281	}
		282
247	/* must be called at most once */	283	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	284	static SV *req_sv (aio_req req, HV *stash)
249	{	285	{
250	if (!req->self)	286	if (!req->self)
251	{	287	{
252	req->self = (SV *)newHV ();	288	req->self = (SV *)newHV ();
253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	289	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254	}	290	}
255		291
256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	292	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
257	}	293	}
258		294
259	static aio_req SvAIO_REQ (SV *sv)	295	static aio_req SvAIO_REQ (SV *sv)
260	{	296	{
261	MAGIC *mg;	297	MAGIC *mg;
262		298
263	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	299	if (!SvROK (sv)
		300	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		301	&& SvSTASH (SvRV (sv)) != aio_req_stash
		302	&& !sv_derived_from (sv, "IO::AIO::REQ")))
264	croak ("object of class " AIO_REQ_KLASS " expected");	303	croak ("object of class IO::AIO::REQ expected");
265		304
266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	305	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267		306
268	return mg ? (aio_req)mg->mg_ptr : 0;	307	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	308	}
270		309
271	static void aio_grp_feed (aio_req grp)	310	static void aio_grp_feed (aio_req grp)
272	{	311	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	312	if (grp->sv2 && SvOK (grp->sv2))
274	{	313	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	314	dSP;
280		315
281	ENTER;	316	ENTER;
282	SAVETMPS;	317	SAVETMPS;
283	PUSHMARK (SP);	318	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	319	XPUSHs (req_sv (grp, aio_grp_stash));
285	PUTBACK;	320	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	321	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	322	SPAGAIN;
288	FREETMPS;	323	FREETMPS;
289	LEAVE;	324	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	325	}
300	}	326	}
301		327
302	static void aio_grp_dec (aio_req grp)	328	static void req_submit (eio_req *req)
303	{	329	{
304	--grp->length;	330	eio_submit (req);
305		331
306	/* call feeder, if applicable */	332	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	333	{
312	req_invoke (grp);	334	dSP;
313	req_free (grp);	335	SV *cb = sv_2mortal (on_next_submit);
		336
		337	on_next_submit = 0;
		338
		339	PUSHMARK (SP);
		340	PUTBACK;
		341	call_sv (cb, G_DISCARD | G_EVAL);
314	}	342	}
315	}	343	}
316		344
317	static void poll_wait ()	345	static int req_invoke (eio_req *req)
318	{	346	{
319	fd_set rfd;	347	if (req->flags & FLAG_SV2_RO_OFF)
		348	SvREADONLY_off (req->sv2);
320		349
321	while (nreqs)	350	if (!EIO_CANCELLED (req) && req->callback)
322	{	351	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;	352	dSP;
345		353	static SV *sv_result_cache; /* caches the result integer SV */
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	354	SV *sv_result;
347	{
348	errno = req->errorno;
349		355
350	ENTER;	356	ENTER;
351	SAVETMPS;	357	SAVETMPS;
352	PUSHMARK (SP);	358	PUSHMARK (SP);
353	EXTEND (SP, 1);	359	EXTEND (SP, 1);
354		360
		361	/* do not recreate the result IV from scratch each time */
		362	if (expect_true (sv_result_cache))
		363	{
		364	sv_result = sv_result_cache; sv_result_cache = 0;
		365	SvIV_set (sv_result, req->result);
		366	}
		367	else
		368	{
		369	sv_result = newSViv (req->result);
		370	SvREADONLY_on (sv_result);
		371	}
		372
355	switch (req->type)	373	switch (req->type)
356	{	374	{
357	case REQ_READDIR:	375	case EIO_READDIR:
358	{	376	{
359	SV *rv = &PL_sv_undef;	377	SV *rv = &PL_sv_undef;
360		378
361	if (req->result >= 0)	379	if (req->result >= 0)
362	{	380	{
363	int i;	381	int i;
364	char *buf = req->data2ptr;	382	char *names = (char *)req->ptr2;
		383	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
365	AV *av = newAV ();	384	AV *av = newAV ();
366		385
367	av_extend (av, req->result - 1);	386	av_extend (av, req->result - 1);
368		387
369	for (i = 0; i < req->result; ++i)	388	for (i = 0; i < req->result; ++i)
370	{	389	{
371	SV *sv = newSVpv (buf, 0);	390	if (req->int1 & EIO_READDIR_DENTS)
		391	{
		392	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
372		393
		394	if (req->int1 & EIO_READDIR_CUSTOM2)
		395	{
		396	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		397	AV *avent = newAV ();
		398
		399	av_extend (avent, 2);
		400
		401	if (!sv_type [ent->type])
		402	{
		403	sv_type [ent->type] = newSViv (ent->type);
		404	SvREADONLY_on (sv_type [ent->type]);
		405	}
		406
		407	av_store (avent, 0, namesv);
		408	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		409	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		410
		411	av_store (av, i, newRV_noinc ((SV *)avent));
		412	}
		413	else
373	av_store (av, i, sv);	414	av_store (av, i, namesv);
		415
		416	++ent;
		417	}
		418	else
		419	{
		420	SV *name = newSVpv (names, 0);
		421	av_store (av, i, name);
374	buf += SvCUR (sv) + 1;	422	names += SvCUR (name) + 1;
		423	}
375	}	424	}
376		425
377	rv = sv_2mortal (newRV_noinc ((SV *)av));	426	rv = sv_2mortal (newRV_noinc ((SV *)av));
378	}	427	}
379		428
380	PUSHs (rv);	429	PUSHs (rv);
		430
		431	if (req->int1 & EIO_READDIR_CUSTOM1)
		432	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
381	}	433	}
382	break;	434	break;
383		435
384	case REQ_OPEN:	436	case EIO_OPEN:
385	{	437	{
386	/* convert fd to fh */	438	/* convert fd to fh */
387	SV *fh;	439	SV *fh = &PL_sv_undef;
388		440
389	PUSHs (sv_2mortal (newSViv (req->result)));	441	if (req->result >= 0)
390	PUTBACK;	442	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	443	GV *gv = (GV *)sv_newmortal ();
392	SPAGAIN;	444	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		445	char sym [64];
		446	int symlen;
		447
		448	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		449	gv_init (gv, aio_stash, sym, symlen, 0);
393		450
394	fh = SvREFCNT_inc (POPs);	451	symlen = snprintf (
		452	sym,
		453	sizeof (sym),
		454	"%s&=%d",
		455	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		456	(int)req->result
		457	);
395		458
		459	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		460	fh = (SV *)gv;
		461	}
		462
396	PUSHMARK (SP);	463	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	464	}
399	break;	465	break;
400		466
		467	case EIO_STATVFS:
		468	case EIO_FSTATVFS:
		469	{
		470	SV *rv = &PL_sv_undef;
		471
		472	if (req->result >= 0)
		473	{
		474	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		475	HV *hv = newHV ();
		476
		477	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		478
		479	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		480	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		481	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		482	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		483	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		484	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		485	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		486	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		487	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		488	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		489	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		490	}
		491
		492	PUSHs (rv);
		493	}
		494
		495	break;
		496
401	case REQ_GROUP:	497	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	498	req->int1 = 2; /* mark group as finished */
403		499
404	if (req->data)	500	if (req->sv1)
405	{	501	{
406	int i;	502	int i;
407	AV *av = (AV *)req->data;	503	AV *av = (AV *)req->sv1;
408		504
409	EXTEND (SP, AvFILL (av) + 1);	505	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	506	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	507	PUSHs (*av_fetch (av, i, 0));
412	}	508	}
413	break;	509	break;
414		510
415	case REQ_NOP:	511	case EIO_NOP:
416	case REQ_BUSY:	512	case EIO_BUSY:
417	break;	513	break;
418		514
		515	case EIO_READLINK:
		516	if (req->result > 0)
		517	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		518	break;
		519
		520	case EIO_STAT:
		521	case EIO_LSTAT:
		522	case EIO_FSTAT:
		523	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		524	PL_laststatval = req->result;
		525	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		526	PUSHs (sv_result);
		527	break;
		528
		529	case EIO_READ:
		530	{
		531	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		532	*SvEND (req->sv2) = 0;
		533	SvPOK_only (req->sv2);
		534	SvSETMAGIC (req->sv2);
		535	PUSHs (sv_result);
		536	}
		537	break;
		538
		539	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		540	if (req->result > 0)
		541	SvIV_set (sv_result, 0);
		542	/* FALLTHROUGH */
		543
419	default:	544	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	545	PUSHs (sv_result);
421	break;	546	break;
422	}	547	}
423		548
		549	errno = req->errorno;
424		550
425	PUTBACK;	551	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	552	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	553	SPAGAIN;
		554
		555	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		556	SvREFCNT_dec (sv_result);
		557	else
		558	sv_result_cache = sv_result;
428		559
429	FREETMPS;	560	FREETMPS;
430	LEAVE;	561	LEAVE;
		562
		563	PUTBACK;
431	}	564	}
432		565
433	if (req->grp)	566	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	567	}
453		568
454	static void req_free (aio_req req)	569	static void req_destroy (aio_req req)
455	{	570	{
456	if (req->self)	571	if (req->self)
457	{	572	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	573	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	574	SvREFCNT_dec (req->self);
460	}	575	}
461		576
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	577	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	578	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	579	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		580
471	Safefree (req);	581	Safefree (req);
472	}	582	}
473		583
474	static void req_cancel_subs (aio_req grp)	584	static void req_cancel_subs (aio_req grp)
475	{	585	{
476	aio_req sub;	586	aio_req sub;
477		587
478	if (grp->type != REQ_GROUP)	588	if (grp->type != EIO_GROUP)
479	return;	589	return;
480		590
481	SvREFCNT_dec (grp->fh2);	591	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	592	grp->sv2 = 0;
483		593
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	594	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	595	}
487		596
488	static void req_cancel (aio_req req)	597	static void
		598	create_respipe (void)
489	{	599	{
490	req->flags |= FLAG_CANCELLED;	600	if (s_epipe_renew (&respipe))
491		601	croak ("IO::AIO: unable to initialize result pipe");
492	req_cancel_subs (req);
493	}	602	}
494		603
		604	static void poll_wait (void)
		605	{
		606	while (eio_nreqs ())
		607	{
		608	int size;
		609
		610	X_LOCK (reslock);
		611	size = res_queue.size;
		612	X_UNLOCK (reslock);
		613
		614	if (size)
		615	return;
		616
		617	etp_maybe_start_thread ();
		618
		619	s_epipe_wait (&respipe);
		620	}
		621	}
		622
495	static int poll_cb ()	623	static int poll_cb (void)
496	{	624	{
497	dSP;
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501
502	for (;;)	625	for (;;)
503	{	626	{
504	LOCK (reslock);	627	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		628
507	if (req)	629	if (res > 0)
508	{
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;	630	croak (0);
522		631
523	--nreqs;	632	if (!max_outstanding || max_outstanding > eio_nreqs ())
		633	return res;
524		634
525	if (req->type == REQ_QUIT)	635	poll_wait ();
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	636	}
554
555	return count;
556	}	637	}
557		638
558	static void *aio_proc(void *arg);
559
560	static void start_thread (void)	639	static void atfork_child (void)
561	{	640	{
562	sigset_t fullsigset, oldsigset;	641	create_respipe ();
563	pthread_attr_t attr;
564
565	worker *wrk = calloc (1, sizeof (worker));
566
567	if (!wrk)
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{
581	wrk->prev = &wrk_first;
582	wrk->next = wrk_first.next;
583	wrk_first.next->prev = wrk;
584	wrk_first.next = wrk;
585	started++;
586	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}
593
594	static void req_send (aio_req req)
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598
599	++nreqs;
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606
607	static void end_thread (void)
608	{
609	aio_req req;
610
611	Newz (0, req, 1, aio_cb);
612
613	req->type = REQ_QUIT;
614	req->pri = PRI_MAX + PRI_BIAS;
615
616	req_send (req);
617	}
618
619	static void min_parallel (int nthreads)
620	{
621	if (wanted < nthreads)
622	wanted = nthreads;
623	}
624
625	static void max_parallel (int nthreads)
626	{
627	int cur = started;
628
629	if (wanted > nthreads)
630	wanted = nthreads;
631
632	while (cur > wanted)
633	{
634	end_thread ();
635	cur--;
636	}
637
638	while (started > wanted)
639	{
640	poll_wait ();
641	poll_cb ();
642	}
643	}
644
645	static void create_pipe ()
646	{
647	if (pipe (respipe))
648	croak ("unable to initialize result pipe");
649
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
651	croak ("cannot set result pipe to nonblocking mode");
652
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
654	croak ("cannot set result pipe to nonblocking mode");
655	}	642	}
656		643
657	/*****************************************************************************/	644	/*****************************************************************************/
658	/* work around various missing functions */
659		645
660	#if !HAVE_PREADWRITE	646	#if !_POSIX_MAPPED_FILES
661	# define pread aio_pread	647	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
662	# define pwrite aio_pwrite	648	# define munmap(addr,length) (errno = ENOSYS, -1)
663		649	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
664	/*
665	* make our pread/pwrite safe against themselves, but not against
666	* normal read/write by using a mutex. slows down execution a lot,
667	* but that's your problem, not mine.
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
672	{
673	ssize_t res;
674	off_t ooffset;
675
676	LOCK (preadwritelock);
677	ooffset = lseek (fd, 0, SEEK_CUR);
678	lseek (fd, offset, SEEK_SET);
679	res = read (fd, buf, count);
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682
683	return res;
684	}
685
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
687	{
688	ssize_t res;
689	off_t ooffset;
690
691	LOCK (preadwritelock);
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697
698	return res;
699	}
700	#endif
701
702	#if !HAVE_FDATASYNC
703	# define fdatasync fsync
704	#endif
705
706	#if !HAVE_READAHEAD
707	# define readahead aio_readahead
708
709	static ssize_t readahead (int fd, off_t offset, size_t count)
710	{
711	dBUF;
712
713	while (count > 0)
714	{
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
716
717	pread (fd, aio_buf, len, offset);
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}
781
782	# elif __hpux
783	res = sendfile (ofd, ifd, offset, count, 0, 0);
784
785	# elif __solaris
786	{
787	struct sendfilevec vec;
788	size_t sbytes;
789
790	vec.sfv_fd = ifd;
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794
795	res = sendfilev (ofd, &vec, 1, &sbytes);
796
797	if (res < 0 && sbytes)
798	res = sbytes;
799	}
800
801	# endif	650	#endif
802	#else
803	res = -1;
804	errno = ENOSYS;
805	#endif
806		651
807	if (res < 0	652	#define MMAP_MAGIC PERL_MAGIC_ext
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817		653
818	res = 0;	654	static int
		655	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		656	{
		657	int old_errno = errno;
		658	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		659	errno = old_errno;
819		660
820	while (count)	661	mg->mg_obj = 0; /* just in case */
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825		662
826	if (cnt <= 0)	663	SvREADONLY_off (sv);
827	{
828	if (cnt && !res) res = -1;
829	break;
830	}
831		664
832	cnt = write (ofd, aio_buf, cnt);	665	if (SvPVX (sv) != mg->mg_ptr)
		666	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
833		667
834	if (cnt <= 0)	668	SvCUR_set (sv, 0);
835	{	669	SvPVX (sv) = 0;
836	if (cnt && !res) res = -1;	670	SvOK_off (sv);
837	break;
838	}
839		671
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;	672	return 0;
847	}	673	}
848		674
849	/* read a full directory */	675	static MGVTBL mmap_vtbl = {
850	static void scandir_ (aio_req req, worker *self)	676	0, 0, 0, 0, mmap_free
851	{	677	};
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}
903	}
904
905	if (errno)
906	res = -1;
907
908	req->result = res;
909	}
910		678
911	/*****************************************************************************/	679	/*****************************************************************************/
912		680
913	static void *aio_proc (void *thr_arg)	681	static SV *
		682	get_cb (SV *cb_sv)
914	{	683	{
915	aio_req req;	684	SvGETMAGIC (cb_sv);
916	int type;	685	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}
1004
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)
1034	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();
1060
1061	atfork_parent ();
1062	}	686	}
1063		687
1064	#define dREQ \	688	#define dREQ \
		689	SV *cb_cv; \
1065	aio_req req; \	690	aio_req req; \
1066	int req_pri = next_pri; \	691	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \	692	next_pri = EIO_PRI_DEFAULT; \
1068	\	693	\
1069	if (SvOK (callback) && !SvROK (callback)) \	694	cb_cv = get_cb (callback); \
1070	croak ("callback must be undef or of reference type"); \
1071	\	695	\
1072	Newz (0, req, 1, aio_cb); \	696	Newz (0, req, 1, eio_req); \
1073	if (!req) \	697	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \	698	croak ("out of memory during eio_req allocation"); \
1075	\	699	\
1076	req->callback = newSVsv (callback); \	700	req->callback = SvREFCNT_inc (cb_cv); \
1077	req->pri = req_pri	701	req->pri = req_pri
1078		702
1079	#define REQ_SEND \	703	#define REQ_SEND \
		704	PUTBACK; \
1080	req_send (req); \	705	req_submit (req); \
		706	SPAGAIN; \
1081	\	707	\
1082	if (GIMME_V != G_VOID) \	708	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));	709	XPUSHs (req_sv (req, aio_req_stash));
1084		710
1085	MODULE = IO::AIO PACKAGE = IO::AIO	711	MODULE = IO::AIO PACKAGE = IO::AIO
1086		712
1087	PROTOTYPES: ENABLE	713	PROTOTYPES: ENABLE
1088		714
1089	BOOT:	715	BOOT:
1090	{	716	{
		717	static const struct {
		718	const char *name;
		719	IV iv;
		720	} *civ, const_iv[] = {
		721	# define const_niv(name, value) { # name, (IV) value },
		722	# define const_iv(name) { # name, (IV) name },
		723	# define const_eio(name) { # name, (IV) EIO_ ## name },
		724	const_iv (EXDEV)
		725	const_iv (ENOSYS)
		726	const_iv (O_RDONLY)
		727	const_iv (O_WRONLY)
		728	const_iv (O_RDWR)
		729	const_iv (O_CREAT)
		730	const_iv (O_TRUNC)
		731	const_iv (O_EXCL)
		732	const_iv (O_APPEND)
		733	#ifndef _WIN32
		734	const_iv (S_IFIFO)
		735	#endif
		736	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		737	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		738	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		739	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		740	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		741	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		742
		743	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		744	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		745	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		746	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		747	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		748
		749	const_iv (ST_RDONLY)
		750	const_iv (ST_NOSUID)
		751	const_iv (ST_NODEV)
		752	const_iv (ST_NOEXEC)
		753	const_iv (ST_SYNCHRONOUS)
		754	const_iv (ST_MANDLOCK)
		755	const_iv (ST_WRITE)
		756	const_iv (ST_APPEND)
		757	const_iv (ST_IMMUTABLE)
		758	const_iv (ST_NOATIME)
		759	const_iv (ST_NODIRATIME)
		760	const_iv (ST_RELATIME)
		761
		762	const_iv (PROT_NONE)
		763	const_iv (PROT_EXEC)
		764	const_iv (PROT_READ)
		765	const_iv (PROT_WRITE)
		766
		767	/*const_iv (MAP_FIXED)*/
		768	const_iv (MAP_PRIVATE)
		769	const_iv (MAP_SHARED)
		770	const_iv (MAP_ANONYMOUS)
		771
		772	/* linuxish */
		773	const_iv (MAP_HUGETLB)
		774	const_iv (MAP_LOCKED)
		775	const_iv (MAP_NORESERVE)
		776	const_iv (MAP_POPULATE)
		777	const_iv (MAP_NONBLOCK)
		778
		779	const_iv (MCL_FUTURE)
		780	const_iv (MCL_CURRENT)
		781
		782	const_eio (MS_ASYNC)
		783	const_eio (MS_INVALIDATE)
		784	const_eio (MS_SYNC)
		785
		786	const_eio (MT_MODIFY)
		787
		788	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		789	const_eio (SYNC_FILE_RANGE_WRITE)
		790	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		791
		792	const_eio (READDIR_DENTS)
		793	const_eio (READDIR_DIRS_FIRST)
		794	const_eio (READDIR_STAT_ORDER)
		795	const_eio (READDIR_FOUND_UNKNOWN)
		796
		797	const_eio (DT_UNKNOWN)
		798	const_eio (DT_FIFO)
		799	const_eio (DT_CHR)
		800	const_eio (DT_DIR)
		801	const_eio (DT_BLK)
		802	const_eio (DT_REG)
		803	const_eio (DT_LNK)
		804	const_eio (DT_SOCK)
		805	const_eio (DT_WHT)
		806	};
		807
1091	HV *stash = gv_stashpv ("IO::AIO", 1);	808	aio_stash = gv_stashpv ("IO::AIO" , 1);
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	809	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	810	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1095		811
		812	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		813	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		814
		815	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		816
1096	create_pipe ();	817	create_respipe ();
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1098	}
1099		818
		819	if (eio_init (want_poll, done_poll) < 0)
		820	croak ("IO::AIO: unable to initialise eio library");
		821
		822	/* atfork child called in fifo order, so before eio's handler */
		823	X_THREAD_ATFORK (0, 0, atfork_child);
		824	}
		825
1100	void	826	void
1101	min_parallel (nthreads)	827	max_poll_reqs (int nreqs)
1102	int nthreads
1103	PROTOTYPE: $	828	PROTOTYPE: $
		829	CODE:
		830	eio_set_max_poll_reqs (nreqs);
1104		831
1105	void	832	void
1106	max_parallel (nthreads)	833	max_poll_time (double nseconds)
1107	int nthreads
1108	PROTOTYPE: $	834	PROTOTYPE: $
		835	CODE:
		836	eio_set_max_poll_time (nseconds);
1109		837
1110	void	838	void
		839	min_parallel (int nthreads)
		840	PROTOTYPE: $
		841	CODE:
		842	eio_set_min_parallel (nthreads);
		843
		844	void
		845	max_parallel (int nthreads)
		846	PROTOTYPE: $
		847	CODE:
		848	eio_set_max_parallel (nthreads);
		849
		850	void
		851	max_idle (int nthreads)
		852	PROTOTYPE: $
		853	CODE:
		854	eio_set_max_idle (nthreads);
		855
		856	void
		857	max_outstanding (int maxreqs)
		858	PROTOTYPE: $
		859	CODE:
		860	max_outstanding = maxreqs;
		861
		862	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	863	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$	864	PROTOTYPE: $$$;$
1117	PPCODE:	865	PPCODE:
1118	{	866	{
1119	dREQ;	867	dREQ;
1120		868
1121	req->type = REQ_OPEN;	869	req->type = EIO_OPEN;
1122	req->data = newSVsv (pathname);	870	req->sv1 = newSVsv (pathname);
1123	req->dataptr = SvPVbyte_nolen (req->data);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1124	req->fd = flags;	872	req->int1 = flags;
1125	req->mode = mode;	873	req->int2 = mode;
1126		874
1127	REQ_SEND;	875	REQ_SEND;
1128	}	876	}
1129		877
1130	void	878	void
1131	aio_close (fh,callback=&PL_sv_undef)	879	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$	880	PROTOTYPE: $;$
1135	ALIAS:	881	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC	882	aio_fsync = EIO_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC	883	aio_fdatasync = EIO_FDATASYNC
1139	PPCODE:	884	PPCODE:
1140	{	885	{
		886	int fd = s_fileno_croak (fh, 0);
1141	dREQ;	887	dREQ;
1142		888
1143	req->type = ix;	889	req->type = ix;
1144	req->fh = newSVsv (fh);	890	req->sv1 = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	891	req->int1 = fd;
1146		892
1147	REQ_SEND (req);	893	REQ_SEND (req);
1148	}	894	}
1149		895
1150	void	896	void
		897	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		898	PROTOTYPE: $$$$;$
		899	PPCODE:
		900	{
		901	int fd = s_fileno_croak (fh, 0);
		902	dREQ;
		903
		904	req->type = EIO_SYNC_FILE_RANGE;
		905	req->sv1 = newSVsv (fh);
		906	req->int1 = fd;
		907	req->offs = offset;
		908	req->size = nbytes;
		909	req->int2 = flags;
		910
		911	REQ_SEND (req);
		912	}
		913
		914	void
		915	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		916	PROTOTYPE: $;$
		917	PPCODE:
		918	{
		919	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		920	int fd = s_fileno_croak (fh, 0);
		921	dREQ;
		922
		923	if (close_pipe < 0)
		924	{
		925	int pipefd [2];
		926
		927	if (pipe (pipefd) < 0
		928	|| close (pipefd [1]) < 0
		929	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		930	abort (); /*D*/
		931
		932	close_pipe = pipefd [0];
		933	}
		934
		935	req->type = EIO_DUP2;
		936	req->int1 = close_pipe;
		937	req->sv2 = newSVsv (fh);
		938	req->int2 = fd;
		939
		940	REQ_SEND (req);
		941	}
		942
		943	void
1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	944	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:	945	ALIAS:
1159	aio_read = REQ_READ	946	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	947	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$	948	PROTOTYPE: $$$$$;$
1162	PPCODE:	949	PPCODE:
1163	{	950	{
1164	aio_req req;
1165	STRLEN svlen;	951	STRLEN svlen;
		952	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1166	char *svptr = SvPVbyte (data, svlen);	953	char *svptr = SvPVbyte (data, svlen);
1167		954	UV len = SvUV (length);
1168	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);
1170		955
1171	if (dataoffset < 0)	956	if (dataoffset < 0)
1172	dataoffset += svlen;	957	dataoffset += svlen;
1173		958
1174	if (dataoffset < 0 || dataoffset > svlen)	959	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	960	croak ("dataoffset outside of data scalar");
1176		961
1177	if (ix == REQ_WRITE)	962	if (ix == EIO_WRITE)
1178	{	963	{
1179	/* write: check length and adjust. */	964	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	965	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	966	len = svlen - dataoffset;
1182	}	967	}
1183	else	968	else
1184	{	969	{
1185	/* read: grow scalar as necessary */	970	/* read: check type and grow scalar as necessary */
		971	SvUPGRADE (data, SVt_PV);
1186	svptr = SvGROW (data, length + dataoffset);	972	svptr = SvGROW (data, len + dataoffset + 1);
1187	}	973	}
1188
1189	if (length < 0)
1190	croak ("length must not be negative");
1191		974
1192	{	975	{
1193	dREQ;	976	dREQ;
1194		977
1195	req->type = ix;	978	req->type = ix;
1196	req->fh = newSVsv (fh);	979	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	980	req->int1 = fd;
1198	: IoOFP (sv_2io (fh)));	981	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	982	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	983	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	984	req->ptr2 = (char *)svptr + dataoffset;
		985	req->stroffset = dataoffset;
1203		986
1204	if (!SvREADONLY (data))	987	if (!SvREADONLY (data))
1205	{	988	{
1206	SvREADONLY_on (data);	989	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	990	req->flags |= FLAG_SV2_RO_OFF;
1208	}	991	}
1209		992
1210	REQ_SEND;	993	REQ_SEND;
1211	}	994	}
1212	}	995	}
1213		996
1214	void	997	void
		998	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		999	PROTOTYPE: $$;$
		1000	PPCODE:
		1001	{
		1002	SV *data;
		1003	dREQ;
		1004
		1005	req->type = EIO_READLINK;
		1006	req->sv1 = newSVsv (path);
		1007	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1008
		1009	REQ_SEND;
		1010	}
		1011
		1012	void
1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1013	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1216	SV * out_fh
1217	SV * in_fh
1218	UV in_offset
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$	1014	PROTOTYPE: $$$$;$
1222	PPCODE:	1015	PPCODE:
1223	{	1016	{
		1017	int ifd = s_fileno_croak (in_fh , 0);
		1018	int ofd = s_fileno_croak (out_fh, 1);
1224	dREQ;	1019	dREQ;
1225		1020
1226	req->type = REQ_SENDFILE;	1021	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	1022	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1023	req->int1 = ofd;
1229	req->fh2 = newSVsv (in_fh);	1024	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1025	req->int2 = ifd;
1231	req->offset = in_offset;	1026	req->offs = in_offset;
1232	req->length = length;	1027	req->size = length;
1233		1028
1234	REQ_SEND;	1029	REQ_SEND;
1235	}	1030	}
1236		1031
1237	void	1032	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1033	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$	1034	PROTOTYPE: $$$;$
1244	PPCODE:	1035	PPCODE:
1245	{	1036	{
		1037	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	1038	dREQ;
1247		1039
1248	req->type = REQ_READAHEAD;	1040	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	1041	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1042	req->int1 = fd;
1251	req->offset = offset;	1043	req->offs = offset;
1252	req->length = length;	1044	req->size = length;
1253		1045
1254	REQ_SEND;	1046	REQ_SEND;
1255	}	1047	}
1256		1048
1257	void	1049	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	1050	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	1051	ALIAS:
1262	aio_stat = REQ_STAT	1052	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	1053	aio_lstat = EIO_LSTAT
		1054	aio_statvfs = EIO_STATVFS
1264	PPCODE:	1055	PPCODE:
1265	{	1056	{
1266	dREQ;	1057	dREQ;
1267		1058
1268	New (0, req->statdata, 1, Stat_t);	1059	req->sv1 = newSVsv (fh_or_path);
1269	if (!req->statdata)
1270	{
1271	req_free (req);
1272	croak ("out of memory during aio_req->statdata allocation");
1273	}
1274		1060
1275	if (SvPOK (fh_or_path))	1061	if (SvPOK (req->sv1))
1276	{	1062	{
1277	req->type = ix;	1063	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);	1064	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280	}	1065	}
1281	else	1066	else
1282	{	1067	{
1283	req->type = REQ_FSTAT;	1068	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1069	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}	1070	}
1287		1071
1288	REQ_SEND;	1072	REQ_SEND;
1289	}	1073	}
1290		1074
1291	void	1075	void
		1076	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1082	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1083	req->sv1 = newSVsv (fh_or_path);
		1084
		1085	if (SvPOK (req->sv1))
		1086	{
		1087	req->type = EIO_UTIME;
		1088	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1089	}
		1090	else
		1091	{
		1092	req->type = EIO_FUTIME;
		1093	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1094	}
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	void
		1100	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1101	PPCODE:
		1102	{
		1103	dREQ;
		1104
		1105	req->sv1 = newSVsv (fh_or_path);
		1106	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1107
		1108	if (SvPOK (req->sv1))
		1109	{
		1110	req->type = EIO_TRUNCATE;
		1111	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1112	}
		1113	else
		1114	{
		1115	req->type = EIO_FTRUNCATE;
		1116	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1117	}
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1124	ALIAS:
		1125	aio_chmod = EIO_CHMOD
		1126	aio_mkdir = EIO_MKDIR
		1127	PPCODE:
		1128	{
		1129	dREQ;
		1130
		1131	req->int2 = mode;
		1132	req->sv1 = newSVsv (fh_or_path);
		1133
		1134	if (SvPOK (req->sv1))
		1135	{
		1136	req->type = ix;
		1137	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1138	}
		1139	else
		1140	{
		1141	req->type = EIO_FCHMOD;
		1142	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1143	}
		1144
		1145	REQ_SEND;
		1146	}
		1147
		1148	void
		1149	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1150	PPCODE:
		1151	{
		1152	dREQ;
		1153
		1154	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1155	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1156	req->sv1 = newSVsv (fh_or_path);
		1157
		1158	if (SvPOK (req->sv1))
		1159	{
		1160	req->type = EIO_CHOWN;
		1161	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1162	}
		1163	else
		1164	{
		1165	req->type = EIO_FCHOWN;
		1166	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1167	}
		1168
		1169	REQ_SEND;
		1170	}
		1171
		1172	void
		1173	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1174	PPCODE:
		1175	{
		1176	dREQ;
		1177
		1178	req->type = EIO_READDIR;
		1179	req->sv1 = newSVsv (pathname);
		1180	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1181	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1182
		1183	if (flags & EIO_READDIR_DENTS)
		1184	req->int1 |= EIO_READDIR_CUSTOM2;
		1185
		1186	REQ_SEND;
		1187	}
		1188
		1189	void
1292	aio_unlink (pathname,callback=&PL_sv_undef)	1190	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	1191	ALIAS:
1296	aio_unlink = REQ_UNLINK	1192	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	1193	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	1194	aio_readdir = EIO_READDIR
1299	PPCODE:	1195	PPCODE:
1300	{	1196	{
1301	dREQ;	1197	dREQ;
1302		1198
1303	req->type = ix;	1199	req->type = ix;
1304	req->data = newSVsv (pathname);	1200	req->sv1 = newSVsv (pathname);
1305	req->dataptr = SvPVbyte_nolen (req->data);	1201	req->ptr1 = SvPVbyte_nolen (req->sv1);
1306		1202
1307	REQ_SEND;	1203	REQ_SEND;
1308	}	1204	}
1309		1205
1310	void	1206	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1207	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:	1208	ALIAS:
1316	aio_link = REQ_LINK	1209	aio_link = EIO_LINK
1317	aio_symlink = REQ_SYMLINK	1210	aio_symlink = EIO_SYMLINK
1318	aio_rename = REQ_RENAME	1211	aio_rename = EIO_RENAME
1319	PPCODE:	1212	PPCODE:
1320	{	1213	{
1321	dREQ;	1214	dREQ;
1322		1215
1323	req->type = ix;	1216	req->type = ix;
1324	req->fh = newSVsv (oldpath);	1217	req->sv1 = newSVsv (oldpath);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	1218	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->data = newSVsv (newpath);	1219	req->sv2 = newSVsv (newpath);
1327	req->dataptr = SvPVbyte_nolen (req->data);	1220	req->ptr2 = SvPVbyte_nolen (req->sv2);
1328		1221
1329	REQ_SEND;	1222	REQ_SEND;
1330	}	1223	}
1331		1224
1332	void	1225	void
1333	aio_busy (delay,callback=&PL_sv_undef)	1226	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	1227	PPCODE:
1337	{	1228	{
1338	dREQ;	1229	dREQ;
1339		1230
1340	req->type = REQ_BUSY;	1231	req->type = EIO_MKNOD;
1341	req->fd = delay < 0. ? 0 : delay;	1232	req->sv1 = newSVsv (pathname);
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
1343		1234	req->int2 = (mode_t)mode;
		1235	req->offs = dev;
		1236
1344	REQ_SEND;	1237	REQ_SEND;
1345	}	1238	}
1346		1239
1347	void	1240	void
		1241	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1242	ALIAS:
		1243	aio_mtouch = EIO_MTOUCH
		1244	aio_msync = EIO_MSYNC
		1245	PROTOTYPE: $$$$;$
		1246	PPCODE:
		1247	{
		1248	STRLEN svlen;
		1249	UV len = SvUV (length);
		1250	char *svptr = SvPVbyte (data, svlen);
		1251
		1252	if (offset < 0)
		1253	offset += svlen;
		1254
		1255	if (offset < 0 || offset > svlen)
		1256	croak ("offset outside of scalar");
		1257
		1258	if (!SvOK (length) || len + offset > svlen)
		1259	len = svlen - offset;
		1260
		1261	{
		1262	dREQ;
		1263
		1264	req->type = ix;
		1265	req->size = len;
		1266	req->sv2 = SvREFCNT_inc (data);
		1267	req->ptr2 = (char *)svptr + offset;
		1268	req->int1 = flags;
		1269
		1270	REQ_SEND;
		1271	}
		1272	}
		1273
		1274	void
		1275	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1276	PPCODE:
		1277	{
		1278	dREQ;
		1279
		1280	req->type = EIO_BUSY;
		1281	req->nv1 = delay < 0. ? 0. : delay;
		1282
		1283	REQ_SEND;
		1284	}
		1285
		1286	void
1348	aio_group (callback=&PL_sv_undef)	1287	aio_group (SV *callback=&PL_sv_undef)
1349	SV * callback
1350	PROTOTYPE: ;$	1288	PROTOTYPE: ;$
1351	PPCODE:	1289	PPCODE:
1352	{	1290	{
1353	dREQ;	1291	dREQ;
1354		1292
1355	req->type = REQ_GROUP;	1293	req->type = EIO_GROUP;
		1294
1356	req_send (req);	1295	req_submit (req);
1357
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1296	XPUSHs (req_sv (req, aio_grp_stash));
1359	}	1297	}
1360		1298
1361	void	1299	void
1362	aio_nop (callback=&PL_sv_undef)	1300	aio_nop (SV *callback=&PL_sv_undef)
1363	SV * callback	1301	ALIAS:
		1302	aio_nop = EIO_NOP
		1303	aio_sync = EIO_SYNC
1364	PPCODE:	1304	PPCODE:
1365	{	1305	{
1366	dREQ;	1306	dREQ;
1367		1307
1368	req->type = REQ_NOP;	1308	req->type = ix;
1369		1309
1370	REQ_SEND;	1310	REQ_SEND;
1371	}	1311	}
1372		1312
1373	void	1313	int
1374	aioreq_pri (int pri = DEFAULT_PRI)	1314	aioreq_pri (int pri = 0)
1375	CODE:	1315	PROTOTYPE: ;$
		1316	CODE:
		1317	RETVAL = next_pri;
		1318	if (items > 0)
		1319	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	1320	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	1321	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	1322	next_pri = pri;
		1323	}
		1324	OUTPUT:
		1325	RETVAL
1379		1326
1380	void	1327	void
1381	aioreq_nice (int nice = 0)	1328	aioreq_nice (int nice = 0)
1382	CODE:	1329	CODE:
1383	nice = next_pri - nice;	1330	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	1331	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	1332	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	1333	next_pri = nice;
1387		1334
1388	void	1335	void
1389	flush ()	1336	flush ()
1390	PROTOTYPE:	1337	PROTOTYPE:
1391	CODE:	1338	CODE:
1392	while (nreqs)	1339	while (eio_nreqs ())
1393	{	1340	{
1394	poll_wait ();	1341	poll_wait ();
1395	poll_cb ();	1342	poll_cb ();
1396	}	1343	}
1397		1344
1398	void	1345	int
1399	poll()	1346	poll()
1400	PROTOTYPE:	1347	PROTOTYPE:
1401	CODE:	1348	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	1349	poll_wait ();
1405	poll_cb ();	1350	RETVAL = poll_cb ();
1406	}	1351	OUTPUT:
		1352	RETVAL
1407		1353
1408	int	1354	int
1409	poll_fileno()	1355	poll_fileno()
1410	PROTOTYPE:	1356	PROTOTYPE:
1411	CODE:	1357	CODE:
1412	RETVAL = respipe [0];	1358	RETVAL = s_epipe_fd (&respipe);
1413	OUTPUT:	1359	OUTPUT:
1414	RETVAL	1360	RETVAL
1415		1361
1416	int	1362	int
1417	poll_cb(...)	1363	poll_cb(...)
…		…
1423		1369
1424	void	1370	void
1425	poll_wait()	1371	poll_wait()
1426	PROTOTYPE:	1372	PROTOTYPE:
1427	CODE:	1373	CODE:
1428	if (nreqs)
1429	poll_wait ();	1374	poll_wait ();
1430		1375
1431	int	1376	int
1432	nreqs()	1377	nreqs()
1433	PROTOTYPE:	1378	PROTOTYPE:
1434	CODE:	1379	CODE:
1435	RETVAL = nreqs;	1380	RETVAL = eio_nreqs ();
1436	OUTPUT:	1381	OUTPUT:
1437	RETVAL	1382	RETVAL
1438		1383
		1384	int
		1385	nready()
		1386	PROTOTYPE:
		1387	CODE:
		1388	RETVAL = eio_nready ();
		1389	OUTPUT:
		1390	RETVAL
		1391
		1392	int
		1393	npending()
		1394	PROTOTYPE:
		1395	CODE:
		1396	RETVAL = eio_npending ();
		1397	OUTPUT:
		1398	RETVAL
		1399
		1400	int
		1401	nthreads()
		1402	PROTOTYPE:
		1403	CODE:
		1404	RETVAL = eio_nthreads ();
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1410	PROTOTYPE: $$$$
		1411	CODE:
		1412	RETVAL = posix_fadvise (fh, offset, length, advice);
		1413	OUTPUT:
		1414	RETVAL
		1415
		1416	ssize_t
		1417	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1418	PROTOTYPE: $$$$
		1419	CODE:
		1420	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void
		1425	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1426	PROTOTYPE: $$$$$;$
		1427	PPCODE:
		1428	sv_unmagic (scalar, MMAP_MAGIC);
		1429	{
		1430	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1431	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1432	if (addr == (void *)-1)
		1433	XSRETURN_NO;
		1434
		1435	sv_force_normal (scalar);
		1436
		1437	/* we store the length in mg_obj, as namlen is I32 :/ */
		1438	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1439	->mg_obj = (SV *)length;
		1440
		1441	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1442
		1443	if (!(prot & PROT_WRITE))
		1444	SvREADONLY_on (scalar);
		1445
		1446	if (SvLEN (scalar))
		1447	Safefree (SvPVX (scalar));
		1448
		1449	SvPVX (scalar) = (char *)addr;
		1450	SvCUR_set (scalar, length);
		1451	SvLEN_set (scalar, 0);
		1452	SvPOK_only (scalar);
		1453
		1454	XSRETURN_YES;
		1455	}
		1456
		1457	void
		1458	munmap (SV *scalar)
		1459	PROTOTYPE: $
		1460	CODE:
		1461	sv_unmagic (scalar, MMAP_MAGIC);
		1462
		1463	int
		1464	madvise (SV *scalar, off_t offset, off_t length, IV advice_or_prot)
		1465	ALIAS:
		1466	mprotect = 1
		1467	PROTOTYPE: $$$$
		1468	CODE:
		1469	{
		1470	STRLEN cur;
		1471	char *addr = SvPVbyte (scalar, cur);
		1472
		1473	if (offset > cur)
		1474	RETVAL = errno = EFAULT;
		1475	else
		1476	{
		1477	if (!SvOK (ST (2)))
		1478	length = cur - offset;
		1479
		1480	if (offset + length > cur)
		1481	RETVAL = errno = EFAULT;
		1482	else
		1483	switch (ix)
		1484	{
		1485	case 0: RETVAL = posix_madvise (addr + offset, length, advice_or_prot); break;
		1486	case 1: RETVAL = mprotect (addr + offset, length, advice_or_prot); break;
		1487	}
		1488	}
		1489	}
		1490	OUTPUT:
		1491	RETVAL
		1492
		1493	int
		1494	mlockall (int flags)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	#if _POSIX_MEMLOCK
		1498	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1499	extern int mallopt (int, int);
		1500	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1501	#endif
		1502	mlockall (flags);
		1503	#else
		1504	RETVAL = -1;
		1505	errno = ENOSYS;
		1506	#endif
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	munlockall ()
		1512	PROTOTYPE:
		1513	CODE:
		1514	#if _POSIX_MEMLOCK
		1515	munlockall ();
		1516	#else
		1517	RETVAL = -1;
		1518	errno = ENOSYS;
		1519	#endif
		1520	OUTPUT:
		1521	RETVAL
		1522
		1523	void _on_next_submit (SV *cb)
		1524	CODE:
		1525	SvREFCNT_dec (on_next_submit);
		1526	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1527
1439	PROTOTYPES: DISABLE	1528	PROTOTYPES: DISABLE
1440		1529
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1530	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1531
1443	void	1532	void
1444	cancel (aio_req_ornot req)	1533	cancel (aio_req_ornot req)
1445	CODE:	1534	CODE:
1446	req_cancel (req);	1535	eio_cancel (req);
1447		1536
1448	void	1537	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1538	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450	CODE:	1539	PPCODE:
		1540	{
		1541	if (GIMME_V != G_VOID)
		1542	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1543
		1544	if (items > 1)
		1545	{
		1546	SV *cb_cv =get_cb (callback);
		1547
1451	SvREFCNT_dec (req->callback);	1548	SvREFCNT_dec (req->callback);
1452	req->callback = newSVsv (callback);	1549	req->callback = SvREFCNT_inc (cb_cv);
		1550	}
		1551	}
1453		1552
1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1553	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455		1554
1456	void	1555	void
1457	add (aio_req grp, ...)	1556	add (aio_req grp, ...)
1458	PPCODE:	1557	PPCODE:
1459	{	1558	{
1460	int i;	1559	int i;
1461	aio_req req;
1462		1560
1463	if (grp->fd == 2)	1561	if (grp->int1 == 2)
1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1562	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1465		1563
1466	for (i = 1; i < items; ++i )	1564	for (i = 1; i < items; ++i )
1467	{	1565	{
		1566	aio_req req;
		1567
1468	if (GIMME_V != G_VOID)	1568	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1569	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1570
1471	req = SvAIO_REQ (ST (i));	1571	req = SvAIO_REQ (ST (i));
1472		1572
1473	if (req)	1573	if (req)
1474	{	1574	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	1575	}
1487	}	1576	}
1488		1577
1489	void	1578	void
1490	cancel_subs (aio_req_ornot req)	1579	cancel_subs (aio_req_ornot req)
…		…
1494	void	1583	void
1495	result (aio_req grp, ...)	1584	result (aio_req grp, ...)
1496	CODE:	1585	CODE:
1497	{	1586	{
1498	int i;	1587	int i;
		1588	AV *av;
		1589
		1590	grp->errorno = errno;
		1591
1499	AV *av = newAV ();	1592	av = newAV ();
		1593	av_extend (av, items - 1);
1500		1594
1501	for (i = 1; i < items; ++i )	1595	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	1596	av_push (av, newSVsv (ST (i)));
1503		1597
1504	SvREFCNT_dec (grp->data);	1598	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	1599	grp->sv1 = (SV *)av;
1506	}	1600	}
		1601
		1602	void
		1603	errno (aio_req grp, int errorno = errno)
		1604	CODE:
		1605	grp->errorno = errorno;
1507		1606
1508	void	1607	void
1509	limit (aio_req grp, int limit)	1608	limit (aio_req grp, int limit)
1510	CODE:	1609	CODE:
1511	grp->fd2 = limit;	1610	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		1611
1514	void	1612	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	1613	feed (aio_req grp, SV *callback=&PL_sv_undef)
1516	CODE:	1614	CODE:
1517	{	1615	{
1518	SvREFCNT_dec (grp->fh2);	1616	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	1617	grp->sv2 = newSVsv (callback);
		1618	grp->feed = aio_grp_feed;
1520		1619
1521	if (grp->fd2 <= 0)	1620	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	1621	grp->int2 = 2;
1523		1622
1524	aio_grp_feed (grp);	1623	eio_grp_limit (grp, grp->int2);
1525	}	1624	}
1526		1625

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