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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.164 by root, Tue May 4 21:14:01 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12		16	#include <sys/statvfs.h>
13	#include <unistd.h>	17	#include <limits.h>
14	#include <fcntl.h>	18	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	19	#include <sched.h>
17		20
18	#include <pthread.h>	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
		22	# include <sys/mman.h>
		23	#endif
19		24
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	/* perl namespace pollution */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	#undef VERSION
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		27
24	#if __ia64	28	#ifdef _WIN32
25	# define STACKSIZE 65536	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
26	#else	66	#else
27	# define STACKSIZE 4096	67
		68	# include <sys/time.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	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
		186	# else
		187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	188	# endif
		189	#endif
		190	#ifndef MAP_HUGETLB
		191	# define MAP_HUGETLB 0
		192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
		195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
		205
		206	#ifndef PAGESIZE
		207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
		209
		210	static int req_invoke (eio_req *req);
		211	#define EIO_FINISH(req) req_invoke (req)
		212	static void req_destroy (eio_req *grp);
		213	#define EIO_DESTROY(req) req_destroy (req)
29		214
30	enum {	215	enum {
31	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	217	};
39		218
40	typedef struct aio_cb {	219	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		220
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
		222	typedef eio_req *aio_req_ornot;
59		223
60	static int started;	224	static SV *on_next_submit;
61	static volatile int nreqs;	225	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	226	static int max_outstanding;
63	static int respipe [2];
64		227
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		229
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	231	static void req_cancel (aio_req req);
72		232
73	static void	233	static void want_poll (void)
74	poll_wait ()
75	{	234	{
76	if (nreqs && !ress)	235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
		245	/* must be called at most once */
		246	static SV *req_sv (aio_req req, HV *stash)
		247	{
		248	if (!req->self)
77	{	249	{
78	fd_set rfd;	250	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	252	}
84	}
85		253
86	static int	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
87	poll_cb ()	255	}
		256
		257	static aio_req SvAIO_REQ (SV *sv)
		258	{
		259	MAGIC *mg;
		260
		261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		265	croak ("object of class IO::AIO::REQ expected");
		266
		267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		268
		269	return mg ? (aio_req)mg->mg_ptr : 0;
		270	}
		271
		272	static void aio_grp_feed (aio_req grp)
		273	{
		274	if (grp->sv2 && SvOK (grp->sv2))
		275	{
		276	dSP;
		277
		278	ENTER;
		279	SAVETMPS;
		280	PUSHMARK (SP);
		281	XPUSHs (req_sv (grp, aio_grp_stash));
		282	PUTBACK;
		283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		284	SPAGAIN;
		285	FREETMPS;
		286	LEAVE;
		287	}
		288	}
		289
		290	static void req_submit (eio_req *req)
		291	{
		292	eio_submit (req);
		293
		294	if (expect_false (on_next_submit))
		295	{
		296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
		304	}
		305	}
		306
		307	static int req_invoke (eio_req *req)
88	{	308	{
89	dSP;	309	dSP;
90	int count = 0;
91	int do_croak = 0;
92	aio_req req, prv;
93		310
94	pthread_mutex_lock (&reslock);	311	if (req->flags & FLAG_SV2_RO_OFF)
		312	SvREADONLY_off (req->sv2);
95		313
96	{	314	if (!EIO_CANCELLED (req) && req->callback)
97	/* read any signals sent by the worker threads */
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{	315	{
110	nreqs--;	316	ENTER;
		317	SAVETMPS;
		318	PUSHMARK (SP);
		319	EXTEND (SP, 1);
111		320
112	if (req->type == REQ_QUIT)	321	switch (req->type)
113	started--;
114	else
115	{	322	{
116	int errorno = errno;	323	case EIO_READDIR:
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	324	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	325	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		326
135	Safefree (req->statdata);	327	if (req->result >= 0)
		328	{
		329	int i;
		330	char *names = (char *)req->ptr2;
		331	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		332	AV *av = newAV ();
		333
		334	av_extend (av, req->result - 1);
		335
		336	for (i = 0; i < req->result; ++i)
		337	{
		338	if (req->int1 & EIO_READDIR_DENTS)
		339	{
		340	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		341
		342	if (req->int1 & EIO_READDIR_CUSTOM2)
		343	{
		344	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		345	AV *avent = newAV ();
		346
		347	av_extend (avent, 2);
		348
		349	if (!sv_type [ent->type])
		350	{
		351	sv_type [ent->type] = newSViv (ent->type);
		352	SvREADONLY_on (sv_type [ent->type]);
		353	}
		354
		355	av_store (avent, 0, namesv);
		356	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		357	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		358
		359	av_store (av, i, newRV_noinc ((SV *)avent));
		360	}
		361	else
		362	av_store (av, i, namesv);
		363
		364	++ent;
		365	}
		366	else
		367	{
		368	SV *name = newSVpv (names, 0);
		369	av_store (av, i, name);
		370	names += SvCUR (name) + 1;
		371	}
		372	}
		373
		374	rv = sv_2mortal (newRV_noinc ((SV *)av));
		375	}
		376
		377	PUSHs (rv);
		378
		379	if (req->int1 & EIO_READDIR_CUSTOM1)
		380	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
136	}	381	}
		382	break;
137		383
138	ENTER;	384	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	385	{
144	/* convert fd to fh */	386	/* convert fd to fh */
145	SV *fh;	387	SV *fh = &PL_sv_undef;
146		388
147	PUTBACK;	389	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	390	{
149	SPAGAIN;	391	GV *gv = (GV *)sv_newmortal ();
		392	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		393	char sym [64];
		394	int symlen;
		395
		396	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		397	gv_init (gv, aio_stash, sym, symlen, 0);
150		398
151	fh = SvREFCNT_inc (POPs);	399	symlen = snprintf (
		400	sym,
		401	sizeof (sym),
		402	"%s&=%d",
		403	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		404	(int)req->result
		405	);
152		406
		407	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		408	fh = (SV *)gv;
		409	}
		410
153	PUSHMARK (SP);	411	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	412	}
		413	break;
156		414
157	if (SvOK (req->callback))	415	case EIO_STATVFS:
		416	case EIO_FSTATVFS:
158	{	417	{
159	PUTBACK;	418	SV *rv = &PL_sv_undef;
160	call_sv (req->callback, G_VOID | G_EVAL);	419
161	SPAGAIN;	420	if (req->result >= 0)
		421	{
		422	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		423	HV *hv = newHV ();
		424
		425	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		426
		427	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		428	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		429	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		430	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		431	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		432	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		433	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		434	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		435	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		436	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		437	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		438	}
		439
		440	PUSHs (rv);
162	}	441	}
163		442
164	do_croak = SvTRUE (ERRSV);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}
174
175	prv = req;
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);
181	}
182
183	return count;
184	}
185
186	static void *aio_proc(void *arg);
187
188	static void
189	start_thread (void)
190	{
191	sigset_t fullsigset, oldsigset;
192	pthread_t tid;
193	pthread_attr_t attr;
194
195	pthread_attr_init (&attr);
196	pthread_attr_setstacksize (&attr, STACKSIZE);
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199	sigfillset (&fullsigset);
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	pthread_mutex_lock (&frklock);
273
274	fork_started = started;
275
276	for (;;) {
277	while (nreqs)
278	{
279	poll_wait ();
280	poll_cb ();
281	}
282
283	max_parallel (0);
284
285	pthread_mutex_lock (&reqlock);
286
287	if (!nreqs && !started)
288	break;	443	break;
289		444
290	pthread_mutex_unlock (&reqlock);	445	case EIO_GROUP:
		446	req->int1 = 2; /* mark group as finished */
291		447
292	min_parallel (fork_started);
293	}
294
295	pthread_mutex_lock (&reslock);
296
297	assert (!started);
298	assert (!nreqs);
299	assert (!reqs && !reqe);
300	assert (!ress && !rese);
301	}
302
303	static void atfork_parent (void)
304	{
305	pthread_mutex_unlock (&reslock);
306	min_parallel (fork_started);
307	pthread_mutex_unlock (&reqlock);
308	pthread_mutex_unlock (&frklock);
309	}
310
311	static void atfork_child (void)
312	{
313	reqs = reqe = 0;
314
315	atfork_parent ();
316	}
317
318	/*****************************************************************************/
319	/* work around various missing functions */
320
321	#if !HAVE_PREADWRITE
322	# define pread aio_pread
323	# define pwrite aio_pwrite
324
325	/*
326	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.
329	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
331
332	static ssize_t
333	pread (int fd, void *buf, size_t count, off_t offset)
334	{
335	ssize_t res;
336	off_t ooffset;
337
338	pthread_mutex_lock (&iolock);
339	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);
344
345	return res;
346	}
347
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)
350	{
351	ssize_t res;
352	off_t ooffset;
353
354	pthread_mutex_lock (&iolock);
355	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);
360
361	return res;
362	}
363	#endif
364
365	#if !HAVE_FDATASYNC
366	# define fdatasync fsync
367	#endif
368
369	#if !HAVE_READAHEAD
370	# define readahead aio_readahead
371
372	static char readahead_buf[4096];
373
374	static ssize_t
375	readahead (int fd, off_t offset, size_t count)
376	{
377	while (count > 0)
378	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380
381	pread (fd, readahead_buf, len, offset);
382	offset += len;
383	count -= len;
384	}
385
386	errno = 0;
387	}
388	#endif
389
390	/*****************************************************************************/
391
392	static void *
393	aio_proc (void *thr_arg)
394	{
395	aio_req req;
396	int type;
397
398	do
399	{
400	pthread_mutex_lock (&reqlock);
401
402	for (;;)
403	{
404	req = reqs;
405
406	if (reqs)	448	if (req->sv1)
		449	{
		450	int i;
		451	AV *av = (AV *)req->sv1;
		452
		453	EXTEND (SP, AvFILL (av) + 1);
		454	for (i = 0; i <= AvFILL (av); ++i)
		455	PUSHs (*av_fetch (av, i, 0));
		456	}
		457	break;
		458
		459	case EIO_NOP:
		460	case EIO_BUSY:
		461	break;
		462
		463	case EIO_READLINK:
		464	if (req->result > 0)
		465	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		466	break;
		467
		468	case EIO_STAT:
		469	case EIO_LSTAT:
		470	case EIO_FSTAT:
		471	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		472	PL_laststatval = req->result;
		473	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		474	PUSHs (sv_2mortal (newSViv (req->result)));
		475	break;
		476
		477	case EIO_READ:
407	{	478	{
408	reqs = reqs->next;	479	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
409	if (!reqs) reqe = 0;	480	*SvEND (req->sv2) = 0;
		481	SvPOK_only (req->sv2);
		482	SvSETMAGIC (req->sv2);
		483	PUSHs (sv_2mortal (newSViv (req->result)));
410	}	484	}
411
412	if (req)
413	break;	485	break;
414		486
415	pthread_cond_wait (&reqwait, &reqlock);
416	}
417
418	pthread_mutex_unlock (&reqlock);
419
420	errno = 0; /* strictly unnecessary */
421
422	type = req->type;
423
424	switch (type)
425	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
430
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;
443
444	case REQ_QUIT:	487	case EIO_DUP2:
445	break;	488	if (req->result > 0)
		489	req->result = 0;
		490	/* FALLTHROUGH */
446		491
447	default:	492	default:
448	req->result = ENOSYS;	493	PUSHs (sv_2mortal (newSViv (req->result)));
449	break;	494	break;
450	}	495	}
451		496
452	req->errorno = errno;	497	errno = req->errorno;
453		498
454	pthread_mutex_lock (&reslock);	499	PUTBACK;
		500	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		501	SPAGAIN;
455		502
456	req->next = 0;	503	FREETMPS;
		504	LEAVE;
457		505
458	if (rese)	506	PUTBACK;
459	{
460	rese->next = req;
461	rese = req;
462	}
463	else
464	{
465	rese = ress = req;
466
467	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);
469	}
470
471	pthread_mutex_unlock (&reslock);
472	}	507	}
473	while (type != REQ_QUIT);	508
		509	return !!SvTRUE (ERRSV);
		510	}
		511
		512	static void req_destroy (aio_req req)
		513	{
		514	if (req->self)
		515	{
		516	sv_unmagic (req->self, PERL_MAGIC_ext);
		517	SvREFCNT_dec (req->self);
		518	}
		519
		520	SvREFCNT_dec (req->sv1);
		521	SvREFCNT_dec (req->sv2);
		522	SvREFCNT_dec (req->callback);
		523
		524	Safefree (req);
		525	}
		526
		527	static void req_cancel_subs (aio_req grp)
		528	{
		529	aio_req sub;
		530
		531	if (grp->type != EIO_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->sv2);
		535	grp->sv2 = 0;
		536
		537	eio_grp_cancel (grp);
		538	}
		539
		540	static void
		541	create_respipe (void)
		542	{
		543	if (s_epipe_renew (&respipe))
		544	croak ("IO::AIO: unable to initialize result pipe");
		545	}
		546
		547	static void poll_wait (void)
		548	{
		549	while (eio_nreqs ())
		550	{
		551	int size;
		552
		553	X_LOCK (reslock);
		554	size = res_queue.size;
		555	X_UNLOCK (reslock);
		556
		557	if (size)
		558	return;
		559
		560	etp_maybe_start_thread ();
		561
		562	s_epipe_wait (&respipe);
		563	}
		564	}
		565
		566	static int poll_cb (void)
		567	{
		568	for (;;)
		569	{
		570	int res = eio_poll ();
		571
		572	if (res > 0)
		573	croak (0);
		574
		575	if (!max_outstanding || max_outstanding > eio_nreqs ())
		576	return res;
		577
		578	poll_wait ();
		579	}
		580	}
		581
		582	static void atfork_child (void)
		583	{
		584	create_respipe ();
		585	}
		586
		587	/*****************************************************************************/
		588
		589	#if !_POSIX_MAPPED_FILES
		590	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		591	# define munmap(addr,length) (errno = ENOSYS, -1)
		592	#endif
		593
		594	#define MMAP_MAGIC PERL_MAGIC_ext
		595
		596	static int
		597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		598	{
		599	int old_errno = errno;
		600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		601	errno = old_errno;
		602
		603	mg->mg_obj = 0; /* just in case */
		604
		605	SvREADONLY_off (sv);
		606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
474		610
475	return 0;	611	return 0;
476	}	612	}
477		613
		614	static MGVTBL mmap_vtbl = {
		615	0, 0, 0, 0, mmap_free
		616	};
		617
		618	/*****************************************************************************/
		619
		620	static SV *
		621	get_cb (SV *cb_sv)
		622	{
		623	SvGETMAGIC (cb_sv);
		624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		625	}
		626
478	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
479	aio_req req; \	629	aio_req req; \
		630	int req_pri = next_pri; \
		631	next_pri = EIO_PRI_DEFAULT; \
480	\	632	\
481	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
482	croak ("clalback must be undef or of reference type"); \
483	\	634	\
484	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
485	if (!req) \	636	if (!req) \
486	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
487	\	638	\
488	req->callback = SvREFCNT_inc (callback);	639	req->callback = SvREFCNT_inc (cb_cv); \
489		640	req->pri = req_pri
		641
		642	#define REQ_SEND \
		643	PUTBACK; \
		644	req_submit (req); \
		645	SPAGAIN; \
		646	\
		647	if (GIMME_V != G_VOID) \
		648	XPUSHs (req_sv (req, aio_req_stash));
		649
490	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
491		651
492	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
493		653
494	BOOT:	654	BOOT:
495	{	655	{
496	if (pipe (respipe))	656	static const struct {
497	croak ("unable to initialize result pipe");	657	const char *name;
		658	IV iv;
		659	} *civ, const_iv[] = {
		660	# define const_niv(name, value) { # name, (IV) value },
		661	# define const_iv(name) { # name, (IV) name },
		662	# define const_eio(name) { # name, (IV) EIO_ ## name },
		663	const_iv (EXDEV)
		664	const_iv (ENOSYS)
		665	const_iv (O_RDONLY)
		666	const_iv (O_WRONLY)
		667	const_iv (O_RDWR)
		668	const_iv (O_CREAT)
		669	const_iv (O_TRUNC)
		670	const_iv (O_EXCL)
		671	const_iv (O_APPEND)
		672	#ifndef _WIN32
		673	const_iv (S_IFIFO)
		674	#endif
		675	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		676	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		677	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		678	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		679	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		680	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
498		681
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	682	const_iv (ST_RDONLY)
500	croak ("cannot set result pipe to nonblocking mode");	683	const_iv (ST_NOSUID)
		684	const_iv (ST_NODEV)
		685	const_iv (ST_NOEXEC)
		686	const_iv (ST_SYNCHRONOUS)
		687	const_iv (ST_MANDLOCK)
		688	const_iv (ST_WRITE)
		689	const_iv (ST_APPEND)
		690	const_iv (ST_IMMUTABLE)
		691	const_iv (ST_NOATIME)
		692	const_iv (ST_NODIRATIME)
		693	const_iv (ST_RELATIME)
501		694
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	695	const_iv (PROT_EXEC)
503	croak ("cannot set result pipe to nonblocking mode");	696	const_iv (PROT_NONE)
		697	const_iv (PROT_READ)
		698	const_iv (PROT_WRITE)
504		699
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	700	/*const_iv (MAP_FIXED)*/
506	}	701	const_iv (MAP_PRIVATE)
		702	const_iv (MAP_SHARED)
		703	const_iv (MAP_ANONYMOUS)
507		704
		705	/* linuxish */
		706	const_iv (MAP_HUGETLB)
		707	const_iv (MAP_LOCKED)
		708	const_iv (MAP_NORESERVE)
		709	const_iv (MAP_POPULATE)
		710	const_iv (MAP_NONBLOCK)
		711
		712	const_iv (MCL_FUTURE)
		713	const_iv (MCL_CURRENT)
		714
		715	const_eio (MS_ASYNC)
		716	const_eio (MS_INVALIDATE)
		717	const_eio (MS_SYNC)
		718
		719	const_eio (MT_MODIFY)
		720
		721	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		722	const_eio (SYNC_FILE_RANGE_WRITE)
		723	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		724
		725	const_eio (READDIR_DENTS)
		726	const_eio (READDIR_DIRS_FIRST)
		727	const_eio (READDIR_STAT_ORDER)
		728	const_eio (READDIR_FOUND_UNKNOWN)
		729
		730	const_eio (DT_UNKNOWN)
		731	const_eio (DT_FIFO)
		732	const_eio (DT_CHR)
		733	const_eio (DT_DIR)
		734	const_eio (DT_BLK)
		735	const_eio (DT_REG)
		736	const_eio (DT_LNK)
		737	const_eio (DT_SOCK)
		738	const_eio (DT_WHT)
		739	};
		740
		741	aio_stash = gv_stashpv ("IO::AIO" , 1);
		742	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		743	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		744
		745	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		746	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		747
		748	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		749
		750	create_respipe ();
		751
		752	if (eio_init (want_poll, done_poll) < 0)
		753	croak ("IO::AIO: unable to initialise eio library");
		754
		755	/* atfork child called in fifo order, so before eio's handler */
		756	X_THREAD_ATFORK (0, 0, atfork_child);
		757	}
		758
508	void	759	void
509	min_parallel(nthreads)	760	max_poll_reqs (int nreqs)
510	int nthreads
511	PROTOTYPE: $	761	PROTOTYPE: $
		762	CODE:
		763	eio_set_max_poll_reqs (nreqs);
512		764
513	void	765	void
514	max_parallel(nthreads)	766	max_poll_time (double nseconds)
515	int nthreads
516	PROTOTYPE: $	767	PROTOTYPE: $
517
518	int
519	max_outstanding(nreqs)
520	int nreqs
521	PROTOTYPE: $
522	CODE:	768	CODE:
523	RETVAL = max_outstanding;	769	eio_set_max_poll_time (nseconds);
		770
		771	void
		772	min_parallel (int nthreads)
		773	PROTOTYPE: $
		774	CODE:
		775	eio_set_min_parallel (nthreads);
		776
		777	void
		778	max_parallel (int nthreads)
		779	PROTOTYPE: $
		780	CODE:
		781	eio_set_max_parallel (nthreads);
		782
		783	void
		784	max_idle (int nthreads)
		785	PROTOTYPE: $
		786	CODE:
		787	eio_set_max_idle (nthreads);
		788
		789	void
		790	max_outstanding (int maxreqs)
		791	PROTOTYPE: $
		792	CODE:
524	max_outstanding = nreqs;	793	max_outstanding = maxreqs;
525		794
526	void	795	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	796	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
528	SV * pathname
529	int flags
530	int mode
531	SV * callback
532	PROTOTYPE: $$$;$	797	PROTOTYPE: $$$;$
533	CODE:	798	PPCODE:
534	{	799	{
535	dREQ;	800	dREQ;
536		801
537	req->type = REQ_OPEN;	802	req->type = EIO_OPEN;
538	req->data = newSVsv (pathname);	803	req->sv1 = newSVsv (pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);	804	req->ptr1 = SvPVbyte_nolen (req->sv1);
540	req->fd = flags;	805	req->int1 = flags;
541	req->mode = mode;	806	req->int2 = mode;
542		807
543	send_req (req);	808	REQ_SEND;
544	}	809	}
545		810
546	void	811	void
547	aio_close(fh,callback=&PL_sv_undef)	812	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
548	SV * fh
549	SV * callback
550	PROTOTYPE: $;$	813	PROTOTYPE: $;$
551	ALIAS:	814	ALIAS:
552	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	815	aio_fsync = EIO_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	816	aio_fdatasync = EIO_FDATASYNC
555	CODE:	817	PPCODE:
556	{	818	{
		819	int fd = s_fileno_croak (fh, 0);
557	dREQ;	820	dREQ;
558		821
559	req->type = ix;	822	req->type = ix;
560	req->fh = newSVsv (fh);	823	req->sv1 = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	824	req->int1 = fd;
562		825
563	send_req (req);	826	REQ_SEND (req);
564	}	827	}
565		828
566	void	829	void
		830	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		831	PROTOTYPE: $$$$;$
		832	PPCODE:
		833	{
		834	int fd = s_fileno_croak (fh, 0);
		835	dREQ;
		836
		837	req->type = EIO_SYNC_FILE_RANGE;
		838	req->sv1 = newSVsv (fh);
		839	req->int1 = fd;
		840	req->offs = offset;
		841	req->size = nbytes;
		842	req->int2 = flags;
		843
		844	REQ_SEND (req);
		845	}
		846
		847	void
		848	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $;$
		850	PPCODE:
		851	{
		852	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	if (close_pipe < 0)
		857	{
		858	int pipefd [2];
		859
		860	if (pipe (pipefd) < 0
		861	|| close (pipefd [1]) < 0
		862	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		863	abort (); /*D*/
		864
		865	close_pipe = pipefd [0];
		866	}
		867
		868	req->type = EIO_DUP2;
		869	req->int1 = close_pipe;
		870	req->sv2 = newSVsv (fh);
		871	req->int2 = fd;
		872
		873	REQ_SEND (req);
		874	}
		875
		876	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	877	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
568	SV * fh
569	UV offset
570	IV length
571	SV * data
572	IV dataoffset
573	SV * callback
574	ALIAS:	878	ALIAS:
575	aio_read = REQ_READ	879	aio_read = EIO_READ
576	aio_write = REQ_WRITE	880	aio_write = EIO_WRITE
577	PROTOTYPE: $$$$$;$	881	PROTOTYPE: $$$$$;$
578	CODE:	882	PPCODE:
579	{	883	{
580	aio_req req;
581	STRLEN svlen;	884	STRLEN svlen;
		885	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
582	char *svptr = SvPVbyte (data, svlen);	886	char *svptr = SvPVbyte (data, svlen);
583		887	UV len = SvUV (length);
584	SvUPGRADE (data, SVt_PV);
585	SvPOK_on (data);
586		888
587	if (dataoffset < 0)	889	if (dataoffset < 0)
588	dataoffset += svlen;	890	dataoffset += svlen;
589		891
590	if (dataoffset < 0 || dataoffset > svlen)	892	if (dataoffset < 0 || dataoffset > svlen)
591	croak ("data offset outside of string");	893	croak ("dataoffset outside of data scalar");
592		894
593	if (ix == REQ_WRITE)	895	if (ix == EIO_WRITE)
594	{	896	{
595	/* write: check length and adjust. */	897	/* write: check length and adjust. */
596	if (length < 0 || length + dataoffset > svlen)	898	if (!SvOK (length) || len + dataoffset > svlen)
597	length = svlen - dataoffset;	899	len = svlen - dataoffset;
598	}	900	}
599	else	901	else
600	{	902	{
601	/* read: grow scalar as necessary */	903	/* read: check type and grow scalar as necessary */
		904	SvUPGRADE (data, SVt_PV);
602	svptr = SvGROW (data, length + dataoffset);	905	svptr = SvGROW (data, len + dataoffset + 1);
603	}	906	}
604
605	if (length < 0)
606	croak ("length must not be negative");
607		907
608	{	908	{
609	dREQ;	909	dREQ;
610		910
611	req->type = ix;	911	req->type = ix;
612	req->fh = newSVsv (fh);	912	req->sv1 = newSVsv (fh);
613	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	913	req->int1 = fd;
614	: IoOFP (sv_2io (fh)));	914	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
615	req->offset = offset;	915	req->size = len;
616	req->length = length;
617	req->data = SvREFCNT_inc (data);	916	req->sv2 = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	917	req->ptr2 = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);	918	req->stroffset = dataoffset;
620		919
621	send_req (req);	920	if (!SvREADONLY (data))
		921	{
		922	SvREADONLY_on (data);
		923	req->flags |= FLAG_SV2_RO_OFF;
		924	}
		925
		926	REQ_SEND;
622	}	927	}
623	}	928	}
624		929
625	void	930	void
		931	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		932	PROTOTYPE: $$;$
		933	PPCODE:
		934	{
		935	SV *data;
		936	dREQ;
		937
		938	req->type = EIO_READLINK;
		939	req->sv1 = newSVsv (path);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941
		942	REQ_SEND;
		943	}
		944
		945	void
		946	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		947	PROTOTYPE: $$$$;$
		948	PPCODE:
		949	{
		950	int ifd = s_fileno_croak (in_fh , 0);
		951	int ofd = s_fileno_croak (out_fh, 1);
		952	dREQ;
		953
		954	req->type = EIO_SENDFILE;
		955	req->sv1 = newSVsv (out_fh);
		956	req->int1 = ofd;
		957	req->sv2 = newSVsv (in_fh);
		958	req->int2 = ifd;
		959	req->offs = in_offset;
		960	req->size = length;
		961
		962	REQ_SEND;
		963	}
		964
		965	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	966	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
627	SV * fh
628	UV offset
629	IV length
630	SV * callback
631	PROTOTYPE: $$$;$	967	PROTOTYPE: $$$;$
632	CODE:	968	PPCODE:
633	{	969	{
		970	int fd = s_fileno_croak (fh, 0);
634	dREQ;	971	dREQ;
635		972
636	req->type = REQ_READAHEAD;	973	req->type = EIO_READAHEAD;
637	req->fh = newSVsv (fh);	974	req->sv1 = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	975	req->int1 = fd;
639	req->offset = offset;	976	req->offs = offset;
640	req->length = length;	977	req->size = length;
641		978
642	send_req (req);	979	REQ_SEND;
643	}	980	}
644		981
645	void	982	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)	983	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
647	SV * fh_or_path
648	SV * callback
649	ALIAS:	984	ALIAS:
650	aio_stat = REQ_STAT	985	aio_stat = EIO_STAT
651	aio_lstat = REQ_LSTAT	986	aio_lstat = EIO_LSTAT
		987	aio_statvfs = EIO_STATVFS
652	CODE:	988	PPCODE:
653	{	989	{
654	dREQ;	990	dREQ;
655		991
656	New (0, req->statdata, 1, Stat_t);	992	req->sv1 = newSVsv (fh_or_path);
657	if (!req->statdata)
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
659		993
660	if (SvPOK (fh_or_path))	994	if (SvPOK (req->sv1))
661	{	995	{
662	req->type = ix;	996	req->type = ix;
663	req->data = newSVsv (fh_or_path);
664	req->dataptr = SvPVbyte_nolen (req->data);	997	req->ptr1 = SvPVbyte_nolen (req->sv1);
665	}	998	}
666	else	999	else
667	{	1000	{
668	req->type = REQ_FSTAT;	1001	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
669	req->fh = newSVsv (fh_or_path);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1002	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
671	}	1003	}
672		1004
673	send_req (req);	1005	REQ_SEND;
674	}	1006	}
675		1007
676	void	1008	void
		1009	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1010	PPCODE:
		1011	{
		1012	dREQ;
		1013
		1014	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1015	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1016	req->sv1 = newSVsv (fh_or_path);
		1017
		1018	if (SvPOK (req->sv1))
		1019	{
		1020	req->type = EIO_UTIME;
		1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1022	}
		1023	else
		1024	{
		1025	req->type = EIO_FUTIME;
		1026	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1027	}
		1028
		1029	REQ_SEND;
		1030	}
		1031
		1032	void
		1033	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1034	PPCODE:
		1035	{
		1036	dREQ;
		1037
		1038	req->sv1 = newSVsv (fh_or_path);
		1039	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1040
		1041	if (SvPOK (req->sv1))
		1042	{
		1043	req->type = EIO_TRUNCATE;
		1044	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1045	}
		1046	else
		1047	{
		1048	req->type = EIO_FTRUNCATE;
		1049	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1050	}
		1051
		1052	REQ_SEND;
		1053	}
		1054
		1055	void
		1056	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1057	ALIAS:
		1058	aio_chmod = EIO_CHMOD
		1059	aio_mkdir = EIO_MKDIR
		1060	PPCODE:
		1061	{
		1062	dREQ;
		1063
		1064	req->int2 = mode;
		1065	req->sv1 = newSVsv (fh_or_path);
		1066
		1067	if (SvPOK (req->sv1))
		1068	{
		1069	req->type = ix;
		1070	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1071	}
		1072	else
		1073	{
		1074	req->type = EIO_FCHMOD;
		1075	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1076	}
		1077
		1078	REQ_SEND;
		1079	}
		1080
		1081	void
		1082	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1083	PPCODE:
		1084	{
		1085	dREQ;
		1086
		1087	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1088	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1089	req->sv1 = newSVsv (fh_or_path);
		1090
		1091	if (SvPOK (req->sv1))
		1092	{
		1093	req->type = EIO_CHOWN;
		1094	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1095	}
		1096	else
		1097	{
		1098	req->type = EIO_FCHOWN;
		1099	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1100	}
		1101
		1102	REQ_SEND;
		1103	}
		1104
		1105	void
		1106	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1107	PPCODE:
		1108	{
		1109	dREQ;
		1110
		1111	req->type = EIO_READDIR;
		1112	req->sv1 = newSVsv (pathname);
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1115
		1116	if (flags & EIO_READDIR_DENTS)
		1117	req->int1 |= EIO_READDIR_CUSTOM2;
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	1123	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
678	SV * pathname
679	SV * callback
680	ALIAS:	1124	ALIAS:
681	aio_unlink = REQ_UNLINK	1125	aio_unlink = EIO_UNLINK
682	aio_rmdir = REQ_RMDIR	1126	aio_rmdir = EIO_RMDIR
		1127	aio_readdir = EIO_READDIR
683	CODE:	1128	PPCODE:
684	{	1129	{
685	dREQ;	1130	dREQ;
686		1131
687	req->type = ix;	1132	req->type = ix;
688	req->data = newSVsv (pathname);	1133	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	1134	req->ptr1 = SvPVbyte_nolen (req->sv1);
690
691	send_req (req);
692	}
693		1135
		1136	REQ_SEND;
		1137	}
		1138
694	void	1139	void
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1140	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
696	SV * oldpath	1141	ALIAS:
697	SV * newpath	1142	aio_link = EIO_LINK
698	SV * callback	1143	aio_symlink = EIO_SYMLINK
		1144	aio_rename = EIO_RENAME
699	CODE:	1145	PPCODE:
700	{	1146	{
701	dREQ;	1147	dREQ;
702		1148
703	req->type = REQ_SYMLINK;	1149	req->type = ix;
704	req->fh = newSVsv (oldpath);	1150	req->sv1 = newSVsv (oldpath);
705	req->data2ptr = SvPVbyte_nolen (req->fh);	1151	req->ptr1 = SvPVbyte_nolen (req->sv1);
706	req->data = newSVsv (newpath);	1152	req->sv2 = newSVsv (newpath);
707	req->dataptr = SvPVbyte_nolen (req->data);	1153	req->ptr2 = SvPVbyte_nolen (req->sv2);
708		1154
709	send_req (req);	1155	REQ_SEND;
710	}	1156	}
711		1157
712	void	1158	void
		1159	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	dREQ;
		1163
		1164	req->type = EIO_MKNOD;
		1165	req->sv1 = newSVsv (pathname);
		1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1167	req->int2 = (mode_t)mode;
		1168	req->offs = dev;
		1169
		1170	REQ_SEND;
		1171	}
		1172
		1173	void
		1174	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1175	ALIAS:
		1176	aio_mtouch = EIO_MTOUCH
		1177	aio_msync = EIO_MSYNC
		1178	PROTOTYPE: $$$$;$
		1179	PPCODE:
		1180	{
		1181	STRLEN svlen;
		1182	UV len = SvUV (length);
		1183	char *svptr = SvPVbyte (data, svlen);
		1184
		1185	if (offset < 0)
		1186	offset += svlen;
		1187
		1188	if (offset < 0 || offset > svlen)
		1189	croak ("offset outside of scalar");
		1190
		1191	if (!SvOK (length) || len + offset > svlen)
		1192	len = svlen - offset;
		1193
		1194	{
		1195	dREQ;
		1196
		1197	req->type = ix;
		1198	req->size = len;
		1199	req->sv2 = SvREFCNT_inc (data);
		1200	req->ptr2 = (char *)svptr + offset;
		1201	req->int1 = flags;
		1202
		1203	REQ_SEND;
		1204	}
		1205	}
		1206
		1207	void
		1208	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1209	PPCODE:
		1210	{
		1211	dREQ;
		1212
		1213	req->type = EIO_BUSY;
		1214	req->nv1 = delay < 0. ? 0. : delay;
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
		1220	aio_group (SV *callback=&PL_sv_undef)
		1221	PROTOTYPE: ;$
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->type = EIO_GROUP;
		1227
		1228	req_submit (req);
		1229	XPUSHs (req_sv (req, aio_grp_stash));
		1230	}
		1231
		1232	void
		1233	aio_nop (SV *callback=&PL_sv_undef)
		1234	ALIAS:
		1235	aio_nop = EIO_NOP
		1236	aio_sync = EIO_SYNC
		1237	PPCODE:
		1238	{
		1239	dREQ;
		1240
		1241	req->type = ix;
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	int
		1247	aioreq_pri (int pri = 0)
		1248	PROTOTYPE: ;$
		1249	CODE:
		1250	RETVAL = next_pri;
		1251	if (items > 0)
		1252	{
		1253	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1254	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1255	next_pri = pri;
		1256	}
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	void
		1261	aioreq_nice (int nice = 0)
		1262	CODE:
		1263	nice = next_pri - nice;
		1264	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1265	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1266	next_pri = nice;
		1267
		1268	void
713	flush()	1269	flush ()
714	PROTOTYPE:	1270	PROTOTYPE:
715	CODE:	1271	CODE:
716	while (nreqs)	1272	while (eio_nreqs ())
717	{	1273	{
718	poll_wait ();	1274	poll_wait ();
719	poll_cb ();	1275	poll_cb ();
720	}	1276	}
721		1277
722	void	1278	int
723	poll()	1279	poll()
724	PROTOTYPE:	1280	PROTOTYPE:
725	CODE:	1281	CODE:
726	if (nreqs)
727	{
728	poll_wait ();	1282	poll_wait ();
729	poll_cb ();	1283	RETVAL = poll_cb ();
730	}	1284	OUTPUT:
		1285	RETVAL
731		1286
732	int	1287	int
733	poll_fileno()	1288	poll_fileno()
734	PROTOTYPE:	1289	PROTOTYPE:
735	CODE:	1290	CODE:
736	RETVAL = respipe [0];	1291	RETVAL = s_epipe_fd (&respipe);
737	OUTPUT:	1292	OUTPUT:
738	RETVAL	1293	RETVAL
739		1294
740	int	1295	int
741	poll_cb(...)	1296	poll_cb(...)
…		…
747		1302
748	void	1303	void
749	poll_wait()	1304	poll_wait()
750	PROTOTYPE:	1305	PROTOTYPE:
751	CODE:	1306	CODE:
752	if (nreqs)
753	poll_wait ();	1307	poll_wait ();
754		1308
755	int	1309	int
756	nreqs()	1310	nreqs()
757	PROTOTYPE:	1311	PROTOTYPE:
758	CODE:	1312	CODE:
759	RETVAL = nreqs;	1313	RETVAL = eio_nreqs ();
760	OUTPUT:	1314	OUTPUT:
761	RETVAL	1315	RETVAL
762		1316
		1317	int
		1318	nready()
		1319	PROTOTYPE:
		1320	CODE:
		1321	RETVAL = eio_nready ();
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
		1326	npending()
		1327	PROTOTYPE:
		1328	CODE:
		1329	RETVAL = eio_npending ();
		1330	OUTPUT:
		1331	RETVAL
		1332
		1333	int
		1334	nthreads()
		1335	PROTOTYPE:
		1336	CODE:
		1337	RETVAL = eio_nthreads ();
		1338	OUTPUT:
		1339	RETVAL
		1340
		1341	int
		1342	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1343	PROTOTYPE: $$$$
		1344	CODE:
		1345	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1346	RETVAL = posix_fadvise (fh, offset, length, advice);
		1347	#else
		1348	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1349	#endif
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	ssize_t
		1354	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1355	PROTOTYPE: $$$$
		1356	CODE:
		1357	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	void
		1362	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1363	PROTOTYPE: $$$$$;$
		1364	PPCODE:
		1365	sv_unmagic (scalar, MMAP_MAGIC);
		1366	{
		1367	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1368	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1369	if (addr == (void *)-1)
		1370	XSRETURN_NO;
		1371
		1372	/* we store the length in mg_obj, as namlen is I32 :/ */
		1373	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1374	->mg_obj = (SV *)length;
		1375
		1376	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1377	if (!(prot & PROT_WRITE))
		1378	SvREADONLY_on (scalar);
		1379
		1380	SvPVX (scalar) = (char *)addr;
		1381	SvCUR_set (scalar, length);
		1382	SvLEN_set (scalar, 0);
		1383	SvPOK_only (scalar);
		1384
		1385	XSRETURN_YES;
		1386	}
		1387
		1388	void
		1389	munmap (SV *scalar)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	sv_unmagic (scalar, MMAP_MAGIC);
		1393
		1394	int
		1395	mlockall (int flags)
		1396	PROTOTYPE: $
		1397	CODE:
		1398	#if _POSIX_MEMLOCK
		1399	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1400	extern int mallopt (int, int);
		1401	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1402	#endif
		1403	mlockall (flags);
		1404	#else
		1405	RETVAL = -1;
		1406	errno = ENOSYS;
		1407	#endif
		1408	OUTPUT:
		1409	RETVAL
		1410
		1411	int
		1412	munlockall ()
		1413	PROTOTYPE:
		1414	CODE:
		1415	#if _POSIX_MEMLOCK
		1416	munlockall ();
		1417	#else
		1418	RETVAL = -1;
		1419	errno = ENOSYS;
		1420	#endif
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void _on_next_submit (SV *cb)
		1425	CODE:
		1426	SvREFCNT_dec (on_next_submit);
		1427	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1428
		1429	PROTOTYPES: DISABLE
		1430
		1431	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1432
		1433	void
		1434	cancel (aio_req_ornot req)
		1435	CODE:
		1436	eio_cancel (req);
		1437
		1438	void
		1439	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1440	PPCODE:
		1441	{
		1442	if (GIMME_V != G_VOID)
		1443	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1444
		1445	if (items > 1)
		1446	{
		1447	SV *cb_cv =get_cb (callback);
		1448
		1449	SvREFCNT_dec (req->callback);
		1450	req->callback = SvREFCNT_inc (cb_cv);
		1451	}
		1452	}
		1453
		1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1455
		1456	void
		1457	add (aio_req grp, ...)
		1458	PPCODE:
		1459	{
		1460	int i;
		1461
		1462	if (grp->int1 == 2)
		1463	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1464
		1465	for (i = 1; i < items; ++i )
		1466	{
		1467	aio_req req;
		1468
		1469	if (GIMME_V != G_VOID)
		1470	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1471
		1472	req = SvAIO_REQ (ST (i));
		1473
		1474	if (req)
		1475	eio_grp_add (grp, req);
		1476	}
		1477	}
		1478
		1479	void
		1480	cancel_subs (aio_req_ornot req)
		1481	CODE:
		1482	req_cancel_subs (req);
		1483
		1484	void
		1485	result (aio_req grp, ...)
		1486	CODE:
		1487	{
		1488	int i;
		1489	AV *av;
		1490
		1491	grp->errorno = errno;
		1492
		1493	av = newAV ();
		1494	av_extend (av, items - 1);
		1495
		1496	for (i = 1; i < items; ++i )
		1497	av_push (av, newSVsv (ST (i)));
		1498
		1499	SvREFCNT_dec (grp->sv1);
		1500	grp->sv1 = (SV *)av;
		1501	}
		1502
		1503	void
		1504	errno (aio_req grp, int errorno = errno)
		1505	CODE:
		1506	grp->errorno = errorno;
		1507
		1508	void
		1509	limit (aio_req grp, int limit)
		1510	CODE:
		1511	eio_grp_limit (grp, limit);
		1512
		1513	void
		1514	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1515	CODE:
		1516	{
		1517	SvREFCNT_dec (grp->sv2);
		1518	grp->sv2 = newSVsv (callback);
		1519	grp->feed = aio_grp_feed;
		1520
		1521	if (grp->int2 <= 0)
		1522	grp->int2 = 2;
		1523
		1524	eio_grp_limit (grp, grp->int2);
		1525	}
		1526

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