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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC vs.
Revision 1.238 by root, Thu Jan 21 23:04:46 2016 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>
26	#include <limits.h>	16	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	17	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	18	#include <sched.h>
31		19
32	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>
35	# elif __freebsd
36	# include <sys/socket.h>
37	# include <sys/uio.h>	21	# include <sys/mman.h>
38	# elif __hpux	22	#endif
		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. on't complain if this fails for you.
		27	*/
		28	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		29	# include <linux/fs.h>
		30	# ifdef FS_IOC_FIEMAP
		31	# include <linux/types.h>
		32	# include <linux/fiemap.h>
		33	# define HAVE_FIEMAP 1
		34	# endif
		35	#endif
		36
		37	/* perl namespace pollution */
		38	#undef VERSION
		39
		40	/* perl stupidly overrides readdir and maybe others */
		41	/* with thread-unsafe versions, imagine that :( */
		42	#undef readdir
		43	#undef opendir
		44	#undef closedir
		45
		46	#ifdef _WIN32
		47
		48	// perl overrides all those nice libc functions
		49
		50	#undef malloc
		51	#undef free
		52	#undef open
		53	#undef read
		54	#undef write
		55	#undef send
		56	#undef recv
		57	#undef stat
		58	#undef lstat
		59	#undef fstat
		60	#undef truncate
		61	#undef ftruncate
		62	#undef open
		63	#undef link
		64	#undef close
		65	#undef unlink
		66	#undef mkdir
		67	#undef rmdir
		68	#undef rename
		69	#undef lseek
		70	#undef opendir
		71	#undef readdir
		72	#undef closedir
		73	#undef chmod
		74	#undef fchmod
		75	#undef dup
		76	#undef dup2
		77	#undef abort
		78	#undef pipe
		79
		80	#define EIO_STRUCT_STAT struct _stati64
		81	#define EIO_STRUCT_STATI64
		82
		83	#else
		84
39	# include <sys/socket.h>	85	#include <sys/time.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	86	#include <sys/select.h>
		87	#include <unistd.h>
		88	#include <utime.h>
		89	#include <signal.h>
		90
		91	#define EIO_STRUCT_STAT Stat_t
		92
		93	#endif
		94
		95	/*****************************************************************************/
		96
		97	#if __GNUC__ >= 3
		98	# define expect(expr,value) __builtin_expect ((expr),(value))
		99	#else
		100	# define expect(expr,value) (expr)
		101	#endif
		102
		103	#define expect_false(expr) expect ((expr) != 0, 0)
		104	#define expect_true(expr) expect ((expr) != 0, 1)
		105
		106	/*****************************************************************************/
		107
		108	typedef SV SV8; /* byte-sv, used for argument-checking */
		109	typedef int aio_rfd; /* read file desriptor */
		110	typedef int aio_wfd; /* write file descriptor */
		111
		112	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		113
		114	#define EIO_REQ_MEMBERS \
		115	SV *callback; \
		116	SV *sv1, *sv2; \
		117	SV *sv3, *sv4; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	static int req_invoke (eio_req *req);
		127	#define EIO_FINISH(req) req_invoke (req)
		128	static void req_destroy (eio_req *grp);
		129	#define EIO_DESTROY(req) req_destroy (req)
		130
		131	#include "libeio/eio.c"
		132
		133	#if !HAVE_POSIX_FADVISE
		134	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#if !HAVE_POSIX_MADVISE
		138	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		139	#endif
		140
		141	#ifndef MAP_ANONYMOUS
		142	# ifdef MAP_ANON
		143	# define MAP_ANONYMOUS MAP_ANON
42	# else	144	# else
43	# error sendfile support requested but not available	145	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	146	# endif
45	#endif	147	#endif
46		148
47	/* used for struct dirent, AIX doesn't provide it */	149	/* defines all sorts of constants to 0 unless they are already defined */
48	#ifndef NAME_MAX	150	/* also provides const_iv_ and const_niv_ macros for them */
49	# define NAME_MAX 4096	151	#include "def0.h"
50	#endif
51		152
52	#if __ia64	153	#ifndef makedev
53	# define STACKSIZE 65536	154	# define makedev(maj,min) (((maj) << 8) | (min))
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	155	#endif
		156	#ifndef major
		157	# define major(dev) ((dev) >> 8)
		158	#endif
		159	#ifndef minor
		160	# define minor(dev) ((dev) & 0xff)
		161	#endif
59		162
60	/* buffer size for various temporary buffers */	163	#if PAGESIZE <= 0
61	#define AIO_BUFSIZE 65536	164	# define PAGESIZE sysconf (_SC_PAGESIZE)
		165	#endif
62		166
63	#define dBUF \	167	/*****************************************************************************/
64	char *aio_buf; \	168
65	LOCK (wrklock); \	169	static void
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	170	fiemap (eio_req *req)
67	UNLOCK (wrklock); \	171	{
68	if (!aio_buf) \	172	req->result = -1;
		173
		174	#if HAVE_FIEMAP
		175	/* assume some c99 */
		176	struct fiemap *fiemap = 0;
		177	size_t end_offset;
		178	int count = req->int3;
		179
		180	req->flags |= EIO_FLAG_PTR1_FREE;
		181
		182	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		183	/* increase in 3.5kb steps */
		184	if (count < 0)
		185	count = 8;
		186
		187	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		188	errno = ENOMEM;
		189	if (!fiemap)
69	return -1;	190	return;
70		191
71	enum {	192	req->ptr1 = fiemap;
72	REQ_QUIT,
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	};
84		193
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	194	fiemap->fm_start = req->offs;
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	195	fiemap->fm_length = req->size;
		196	fiemap->fm_flags = req->int2;
		197	fiemap->fm_extent_count = count;
87		198
88	typedef struct aio_cb	199	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
89	{	200	return;
90	struct aio_cb *volatile next;
91		201
92	SV *data, *callback;	202	if (req->int3 >= 0 /* not autosizing */
93	SV *fh, *fh2;	203	|| !fiemap->fm_mapped_extents /* no more extents */
94	void *dataptr, *data2ptr;	204	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
95	Stat_t *statdata;	205	goto done;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99		206
100	STRLEN dataoffset;	207	/* else we have to loop -
101	int type;	208	* it would be tempting (actually I tried that first) to just query the
102	int fd, fd2;	209	* number of extents needed, but linux often feels like not returning all
103	int errorno;	210	* extents, without telling us it left any out. this complicates
104	mode_t mode; /* open */	211	* this quite a bit.
		212	*/
105		213
106	unsigned char flags;	214	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
107	unsigned char pri;
108		215
109	SV *self; /* the perl counterpart of this request, if any */	216	for (;;)
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;
118	typedef aio_cb *aio_req_ornot;
119
120	enum {
121	PRI_MIN = -4,
122	PRI_MAX = 4,
123
124	DEFAULT_PRI = 0,
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int max_outstanding = 1<<30;
134	static int respipe [2];
135
136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138	#else
139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140	#endif
141
142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145	/* worker threasd management */
146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148	typedef struct worker {
149	/* locked by wrklock */
150	struct worker *prev, *next;
151
152	pthread_t tid;
153
154	/* locked by reslock, reqlock or wrklock */
155	aio_req req; /* currently processed request */
156	void *dbuf;
157	DIR *dirp;
158	} worker;
159
160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162	static void worker_clear (worker *wrk)
163	{
164	if (wrk->dirp)
165	{	217	{
166	closedir (wrk->dirp);	218	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
167	wrk->dirp = 0;	219	char scratch[3072];
168	}	220	struct fiemap *incmap = (struct fiemap *)scratch;
169		221
170	if (wrk->dbuf)	222	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
171	{	223	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
172	free (wrk->dbuf);	224	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
173	wrk->dbuf = 0;	225	incmap->fm_flags = fiemap->fm_flags;
174	}	226	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
175	}
176		227
177	static void worker_free (worker *wrk)	228	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
178	{
179	wrk->next->prev = wrk->prev;
180	wrk->prev->next = wrk->next;
181
182	free (wrk);
183	}
184
185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
188
189	/*
190	* a somewhat faster data structure might be nice, but
191	* with 8 priorities this actually needs <20 insns
192	* per shift, the most expensive operation.
193	*/
194	typedef struct {
195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196	int size;
197	} reqq;
198
199	static reqq req_queue;
200	static reqq res_queue;
201
202	int reqq_push (reqq *q, aio_req req)
203	{
204	int pri = req->pri;
205	req->next = 0;
206
207	if (q->qe[pri])
208	{
209	q->qe[pri]->next = req;
210	q->qe[pri] = req;
211	}
212	else
213	q->qe[pri] = q->qs[pri] = req;
214
215	return q->size++;
216	}
217
218	aio_req reqq_shift (reqq *q)
219	{
220	int pri;
221
222	if (!q->size)
223	return 0;	229	return;
224		230
225	--q->size;	231	if (!incmap->fm_mapped_extents)
		232	goto done;
226		233
227	for (pri = NUM_PRI; pri--; )	234	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
228	{	235	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
229	aio_req req = q->qs[pri];	236	errno = ENOMEM;
230
231	if (req)	237	if (!fiemap)
		238	return;
		239
		240	req->ptr1 = fiemap;
		241
		242	for (count = 0; count < incmap->fm_mapped_extents; ++count)
232	{	243	{
233	if (!(q->qs[pri] = req->next))	244	struct fiemap_extent *e = incmap->fm_extents + count;
234	q->qe[pri] = 0;
235		245
236	return req;	246	if (e->fe_logical + e->fe_length >= end_offset)
		247	goto done;
		248
		249	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		250
		251	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		252	goto done;
		253
237	}	254	}
238	}	255	}
239		256
240	abort ();	257	done:
241	}	258	req->result = 0;
242		259
		260	#else
		261	errno = ENOSYS;
		262	#endif
		263	}
		264
		265	/*****************************************************************************/
		266
		267	enum {
		268	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		269	};
		270
		271	typedef eio_req *aio_req;
		272	typedef eio_req *aio_req_ornot;
		273	typedef eio_wd aio_wd;
		274
		275	static SV *on_next_submit;
		276	static int next_pri = EIO_PRI_DEFAULT;
		277	static int max_outstanding;
		278
		279	static s_epipe respipe;
		280
		281	static void req_destroy (aio_req req);
243	static void req_invoke (aio_req req);	282	static void req_cancel (aio_req req);
244	static void req_free (aio_req req);	283
		284	static void
		285	want_poll (void)
		286	{
		287	/* write a dummy byte to the pipe so fh becomes ready */
		288	s_epipe_signal (&respipe);
		289	}
		290
		291	static void
		292	done_poll (void)
		293	{
		294	/* read any signals sent by the worker threads */
		295	s_epipe_drain (&respipe);
		296	}
245		297
246	/* must be called at most once */	298	/* must be called at most once */
247	static SV *req_sv (aio_req req, const char *klass)	299	static SV *
		300	req_sv (aio_req req, HV *stash)
248	{	301	{
249	if (!req->self)	302	if (!req->self)
250	{	303	{
251	req->self = (SV *)newHV ();	304	req->self = (SV *)newHV ();
252	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	305	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
253	}	306	}
254		307
255	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	308	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
256	}	309	}
257		310
258	static aio_req SvAIO_REQ (SV *sv)	311	static SV *
		312	newSVaio_wd (aio_wd wd)
		313	{
		314	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		315	}
		316
		317	static aio_req
		318	SvAIO_REQ (SV *sv)
259	{	319	{
260	MAGIC *mg;	320	MAGIC *mg;
261		321
262	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	322	if (!SvROK (sv)
		323	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		324	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		325	&& SvSTASH (SvRV (sv)) != aio_req_stash
		326	&& !sv_derived_from (sv, "IO::AIO::REQ")))
263	croak ("object of class " AIO_REQ_KLASS " expected");	327	croak ("object of class IO::AIO::REQ expected");
264		328
265	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	329	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
266		330
267	return mg ? (aio_req)mg->mg_ptr : 0;	331	return mg ? (aio_req)mg->mg_ptr : 0;
268	}	332	}
269		333
		334	static aio_wd
		335	SvAIO_WD (SV *sv)
		336	{
		337	if (!SvROK (sv)
		338	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		339	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		340	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		341
		342	return (aio_wd)(long)SvIVX (SvRV (sv));
		343	}
		344
		345	static SV *
		346	newmortalFH (int fd, int flags)
		347	{
		348	if (fd < 0)
		349	return &PL_sv_undef;
		350
		351	GV *gv = (GV *)sv_newmortal ();
		352	char sym[64];
		353	int symlen;
		354
		355	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		356	gv_init (gv, aio_stash, sym, symlen, 0);
		357
		358	symlen = snprintf (
		359	sym,
		360	sizeof (sym),
		361	"%s&=%d",
		362	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		363	fd
		364	);
		365
		366	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		367	? (SV *)gv : &PL_sv_undef;
		368	}
		369
		370	static void
270	static void aio_grp_feed (aio_req grp)	371	aio_grp_feed (aio_req grp)
271	{	372	{
272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	373	if (grp->sv2 && SvOK (grp->sv2))
273	{	374	{
274	int old_len = grp->length;
275
276	if (grp->fh2 && SvOK (grp->fh2))
277	{
278	dSP;	375	dSP;
279		376
280	ENTER;	377	ENTER;
281	SAVETMPS;	378	SAVETMPS;
282	PUSHMARK (SP);	379	PUSHMARK (SP);
283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	380	XPUSHs (req_sv (grp, aio_grp_stash));
284	PUTBACK;	381	PUTBACK;
285	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	382	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
286	SPAGAIN;	383	SPAGAIN;
287	FREETMPS;	384	FREETMPS;
288	LEAVE;	385	LEAVE;
289	}
290
291	/* stop if no progress has been made */
292	if (old_len == grp->length)
293	{
294	SvREFCNT_dec (grp->fh2);
295	grp->fh2 = 0;
296	break;
297	}
298	}	386	}
299	}	387	}
300		388
301	static void aio_grp_dec (aio_req grp)	389	static void
		390	req_submit (eio_req *req)
302	{	391	{
303	--grp->length;	392	eio_submit (req);
304		393
305	/* call feeder, if applicable */	394	if (expect_false (on_next_submit))
306	aio_grp_feed (grp);
307
308	/* finish, if done */
309	if (!grp->length && grp->fd)
310	{	395	{
311	req_invoke (grp);	396	dSP;
312	req_free (grp);	397	SV *cb = sv_2mortal (on_next_submit);
		398
		399	on_next_submit = 0;
		400
		401	PUSHMARK (SP);
		402	PUTBACK;
		403	call_sv (cb, G_DISCARD | G_EVAL);
313	}	404	}
314	}	405	}
315		406
316	static void poll_wait ()	407	static int
		408	req_invoke (eio_req *req)
317	{	409	{
318	fd_set rfd;	410	if (req->flags & FLAG_SV2_RO_OFF)
		411	SvREADONLY_off (req->sv2);
319		412
320	while (nreqs)	413	if (!EIO_CANCELLED (req) && req->callback)
321	{	414	{
322	int size;
323	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324	LOCK (reslock);
325	#endif
326	size = res_queue.size;
327	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328	UNLOCK (reslock);
329	#endif
330
331	if (size)
332	return;
333
334	FD_ZERO(&rfd);
335	FD_SET(respipe [0], &rfd);
336
337	select (respipe [0] + 1, &rfd, 0, 0, 0);
338	}
339	}
340
341	static void req_invoke (aio_req req)
342	{
343	dSP;	415	dSP;
344		416	static SV *sv_result_cache; /* caches the result integer SV */
345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	417	SV *sv_result;
346	{
347	errno = req->errorno;
348		418
349	ENTER;	419	ENTER;
350	SAVETMPS;	420	SAVETMPS;
351	PUSHMARK (SP);	421	PUSHMARK (SP);
352	EXTEND (SP, 1);	422	EXTEND (SP, 1);
353		423
		424	/* do not recreate the result IV from scratch each time */
		425	if (expect_true (sv_result_cache))
		426	{
		427	sv_result = sv_result_cache; sv_result_cache = 0;
		428	SvIV_set (sv_result, req->result);
		429	SvIOK_only (sv_result);
		430	}
		431	else
		432	{
		433	sv_result = newSViv (req->result);
		434	SvREADONLY_on (sv_result);
		435	}
		436
354	switch (req->type)	437	switch (req->type)
355	{	438	{
		439	case EIO_WD_OPEN:
		440	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		441	break;
		442
356	case REQ_READDIR:	443	case EIO_READDIR:
357	{	444	{
358	SV *rv = &PL_sv_undef;	445	SV *rv = &PL_sv_undef;
359		446
360	if (req->result >= 0)	447	if (req->result >= 0)
361	{	448	{
362	int i;	449	int i;
363	char *buf = req->data2ptr;	450	char *names = (char *)req->ptr2;
		451	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
364	AV *av = newAV ();	452	AV *av = newAV ();
365		453
366	av_extend (av, req->result - 1);	454	av_extend (av, req->result - 1);
367		455
368	for (i = 0; i < req->result; ++i)	456	for (i = 0; i < req->result; ++i)
369	{	457	{
370	SV *sv = newSVpv (buf, 0);	458	if (req->int1 & EIO_READDIR_DENTS)
		459	{
		460	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
371		461
		462	if (req->int1 & EIO_READDIR_CUSTOM2)
		463	{
		464	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		465	AV *avent = newAV ();
		466
		467	av_extend (avent, 2);
		468
		469	if (!sv_type [ent->type])
		470	{
		471	sv_type [ent->type] = newSViv (ent->type);
		472	SvREADONLY_on (sv_type [ent->type]);
		473	}
		474
		475	av_store (avent, 0, namesv);
		476	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		477	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		478
		479	av_store (av, i, newRV_noinc ((SV *)avent));
		480	}
		481	else
372	av_store (av, i, sv);	482	av_store (av, i, namesv);
		483
		484	++ent;
		485	}
		486	else
		487	{
		488	SV *name = newSVpv (names, 0);
		489	av_store (av, i, name);
373	buf += SvCUR (sv) + 1;	490	names += SvCUR (name) + 1;
		491	}
374	}	492	}
375		493
376	rv = sv_2mortal (newRV_noinc ((SV *)av));	494	rv = sv_2mortal (newRV_noinc ((SV *)av));
377	}	495	}
378		496
379	PUSHs (rv);	497	PUSHs (rv);
		498
		499	if (req->int1 & EIO_READDIR_CUSTOM1)
		500	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
380	}	501	}
381	break;	502	break;
382		503
383	case REQ_OPEN:	504	case EIO_OPEN:
		505	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		506	break;
		507
		508	case EIO_STATVFS:
		509	case EIO_FSTATVFS:
384	{	510	{
385	/* convert fd to fh */	511	SV *rv = &PL_sv_undef;
386	SV *fh;	512
		513	#ifndef _WIN32
		514	if (req->result >= 0)
		515	{
		516	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		517	HV *hv = newHV ();
		518	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		519	* chooses to make it a struct.
		520	*/
		521	unsigned long fsid = 0;
		522	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
387		523
388	PUSHs (sv_2mortal (newSViv (req->result)));	524	rv = sv_2mortal (newRV_noinc ((SV *)hv));
389	PUTBACK;
390	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
391	SPAGAIN;
392		525
393	fh = SvREFCNT_inc (POPs);	526	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		527	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		528	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		529	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		530	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		531	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		532	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		533	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		534	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		535	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		536	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		537	}
		538	#endif
394		539
395	PUSHMARK (SP);	540	PUSHs (rv);
396	XPUSHs (sv_2mortal (fh));
397	}	541	}
		542
398	break;	543	break;
399		544
400	case REQ_GROUP:	545	case EIO_GROUP:
401	req->fd = 2; /* mark group as finished */	546	req->int1 = 2; /* mark group as finished */
402		547
403	if (req->data)	548	if (req->sv1)
404	{	549	{
405	int i;	550	int i;
406	AV *av = (AV *)req->data;	551	AV *av = (AV *)req->sv1;
407		552
408	EXTEND (SP, AvFILL (av) + 1);	553	EXTEND (SP, AvFILL (av) + 1);
409	for (i = 0; i <= AvFILL (av); ++i)	554	for (i = 0; i <= AvFILL (av); ++i)
410	PUSHs (*av_fetch (av, i, 0));	555	PUSHs (*av_fetch (av, i, 0));
411	}	556	}
412	break;	557	break;
413		558
414	case REQ_NOP:	559	case EIO_NOP:
415	case REQ_BUSY:	560	case EIO_BUSY:
416	break;	561	break;
417		562
		563	case EIO_READLINK:
		564	case EIO_REALPATH:
		565	if (req->result > 0)
		566	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		567	break;
		568
		569	case EIO_STAT:
		570	case EIO_LSTAT:
		571	case EIO_FSTAT:
		572	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		573
		574	if (!(PL_laststatval = req->result))
		575	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		576	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		577
		578	PUSHs (sv_result);
		579	break;
		580
		581	case EIO_SEEK:
		582	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		583	break;
		584
		585	case EIO_READ:
		586	{
		587	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		588	*SvEND (req->sv2) = 0;
		589	SvPOK_only (req->sv2);
		590	SvSETMAGIC (req->sv2);
		591	PUSHs (sv_result);
		592	}
		593	break;
		594
		595	case EIO_CUSTOM:
		596	if (req->feed == fiemap)
		597	{
		598	#if HAVE_FIEMAP
		599	if (!req->result)
		600	{
		601	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		602
		603	if (fiemap->fm_extent_count)
		604	{
		605	AV *av = newAV ();
		606	int i;
		607
		608	while (fiemap->fm_mapped_extents)
		609	{
		610	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		611	AV *ext_av = newAV ();
		612
		613	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		614	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		615	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		616	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		617
		618	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		619	}
		620
		621	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		622	}
		623	else
		624	{
		625	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		626	PUSHs (sv_result);
		627	}
		628	}
		629	#endif
		630	}
		631	else
		632	PUSHs (sv_result);
		633	break;
		634
		635	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		636	if (req->result > 0)
		637	SvIV_set (sv_result, 0);
		638	/* FALLTHROUGH */
		639
418	default:	640	default:
419	PUSHs (sv_2mortal (newSViv (req->result)));	641	PUSHs (sv_result);
420	break;	642	break;
421	}	643	}
422		644
		645	errno = req->errorno;
423		646
424	PUTBACK;	647	PUTBACK;
425	call_sv (req->callback, G_VOID | G_EVAL);	648	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
426	SPAGAIN;	649	SPAGAIN;
		650
		651	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		652	SvREFCNT_dec (sv_result);
		653	else
		654	sv_result_cache = sv_result;
427		655
428	FREETMPS;	656	FREETMPS;
429	LEAVE;	657	LEAVE;
		658
		659	PUTBACK;
430	}	660	}
431		661
432	if (req->grp)	662	return !!SvTRUE (ERRSV);
433	{
434	aio_req grp = req->grp;
435
436	/* unlink request */
437	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
438	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
439
440	if (grp->grp_first == req)
441	grp->grp_first = req->grp_next;
442
443	aio_grp_dec (grp);
444	}
445
446	if (SvTRUE (ERRSV))
447	{
448	req_free (req);
449	croak (0);
450	}
451	}	663	}
452		664
453	static void req_free (aio_req req)	665	static void
		666	req_destroy (aio_req req)
454	{	667	{
455	if (req->self)	668	if (req->self)
456	{	669	{
457	sv_unmagic (req->self, PERL_MAGIC_ext);	670	sv_unmagic (req->self, PERL_MAGIC_ext);
458	SvREFCNT_dec (req->self);	671	SvREFCNT_dec (req->self);
459	}	672	}
460		673
461	SvREFCNT_dec (req->data);
462	SvREFCNT_dec (req->fh);	674	SvREFCNT_dec (req->sv1);
463	SvREFCNT_dec (req->fh2);	675	SvREFCNT_dec (req->sv2);
		676	SvREFCNT_dec (req->sv3);
		677	SvREFCNT_dec (req->sv4);
464	SvREFCNT_dec (req->callback);	678	SvREFCNT_dec (req->callback);
465	Safefree (req->statdata);
466		679
467	if (req->type == REQ_READDIR)
468	free (req->data2ptr);
469
470	Safefree (req);	680	free (req);
471	}	681	}
472		682
473	static void req_cancel (aio_req req)	683	static void
		684	req_cancel_subs (aio_req grp)
474	{	685	{
475	req->flags |= FLAG_CANCELLED;
476
477	if (req->type == REQ_GROUP)	686	if (grp->type != EIO_GROUP)
		687	return;
		688
		689	SvREFCNT_dec (grp->sv2);
		690	grp->sv2 = 0;
		691
		692	eio_grp_cancel (grp);
		693	}
		694
		695	static void ecb_cold
		696	create_respipe (void)
		697	{
		698	if (s_epipe_renew (&respipe))
		699	croak ("IO::AIO: unable to initialize result pipe");
		700	}
		701
		702	static void
		703	poll_wait (void)
		704	{
		705	while (eio_nreqs ())
478	{	706	{
479	aio_req sub;	707	int size;
480		708
481	for (sub = req->grp_first; sub; sub = sub->grp_next)	709	X_LOCK (EIO_POOL->reslock);
482	req_cancel (sub);	710	size = EIO_POOL->res_queue.size;
		711	X_UNLOCK (EIO_POOL->reslock);
		712
		713	if (size)
		714	return;
		715
		716	etp_maybe_start_thread (EIO_POOL);
		717
		718	s_epipe_wait (&respipe);
483	}	719	}
484	}	720	}
485		721
486	static int poll_cb ()	722	static int
		723	poll_cb (void)
487	{	724	{
488	dSP;
489	int count = 0;
490	int do_croak = 0;
491	aio_req req;
492
493	for (;;)	725	for (;;)
494	{	726	{
495	LOCK (reslock);	727	int res = eio_poll ();
496	req = reqq_shift (&res_queue);
497		728
498	if (req)	729	if (res > 0)
		730	croak (0);
		731
		732	if (!max_outstanding || max_outstanding > eio_nreqs ())
		733	return res;
		734
		735	poll_wait ();
		736	}
		737	}
		738
		739	static void ecb_cold
		740	reinit (void)
		741	{
		742	create_respipe ();
		743
		744	if (eio_init (want_poll, done_poll) < 0)
		745	croak ("IO::AIO: unable to initialise eio library");
		746	}
		747
		748	/*****************************************************************************/
		749
		750	#if !_POSIX_MAPPED_FILES
		751	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		752	# define munmap(addr,length) EIO_ENOSYS ()
		753	#endif
		754
		755	#if !_POSIX_MEMORY_PROTECTION
		756	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		757	#endif
		758
		759	#define MMAP_MAGIC PERL_MAGIC_ext
		760
		761	static int ecb_cold
		762	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		763	{
		764	int old_errno = errno;
		765	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		766	errno = old_errno;
		767
		768	mg->mg_obj = 0; /* just in case */
		769
		770	SvREADONLY_off (sv);
		771
		772	if (SvPVX (sv) != mg->mg_ptr)
		773	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		774
		775	SvCUR_set (sv, 0);
		776	SvPVX (sv) = 0;
		777	SvOK_off (sv);
		778
		779	return 0;
		780	}
		781
		782	static MGVTBL mmap_vtbl = {
		783	0, 0, 0, 0, mmap_free
		784	};
		785
		786	/*****************************************************************************/
		787
		788	static SV *
		789	get_cb (SV *cb_sv)
		790	{
		791	SvGETMAGIC (cb_sv);
		792	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		793	}
		794
		795	static aio_req ecb_noinline
		796	dreq (SV *callback)
		797	{
		798	SV *cb_cv;
		799	aio_req req;
		800	int req_pri = next_pri;
		801	next_pri = EIO_PRI_DEFAULT;
		802
		803	cb_cv = get_cb (callback);
		804
		805	req = calloc (sizeof (*req), 1);
		806	if (!req)
		807	croak ("out of memory during eio_req allocation");
		808
		809	req->callback = SvREFCNT_inc (cb_cv);
		810	req->pri = req_pri;
		811
		812	return req;
		813	}
		814
		815	#define dREQ \
		816	aio_req req = dreq (callback); \
		817
		818	#define REQ_SEND \
		819	PUTBACK; \
		820	req_submit (req); \
		821	SPAGAIN; \
		822	\
		823	if (GIMME_V != G_VOID) \
		824	XPUSHs (req_sv (req, aio_req_stash));
		825
		826	ecb_inline void
		827	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		828	{
		829	if (expect_false (SvROK (path)))
		830	{
		831	SV *rv = SvRV (path);
		832	SV *wdob;
		833
		834	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
499	{	835	{
500	if (!res_queue.size)	836	path = AvARRAY (rv)[1];
		837	wdob = AvARRAY (rv)[0];
		838
		839	if (SvOK (wdob))
501	{	840	{
502	/* read any signals sent by the worker threads */	841	*wd = SvAIO_WD (wdob);
503	char buf [32];	842	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
504	while (read (respipe [0], buf, 32) == 32)
505	;
506	}	843	}
		844	else
		845	*wd = EIO_INVALID_WD;
507	}	846	}
508		847	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
509	UNLOCK (reslock);
510
511	if (!req)
512	break;
513
514	--nreqs;
515
516	if (req->type == REQ_QUIT)
517	started--;
518	else if (req->type == REQ_GROUP && req->length)
519	{	848	{
520	req->fd = 1; /* mark request as delayed */	849	*wd = (aio_wd)(long)SvIVX (rv);
521	continue;	850	*wdsv = SvREFCNT_inc_NN (rv);
		851	*ptr = ".";
		852	return; /* path set to "." */
522	}	853	}
523	else	854	else
524	{	855	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
525	if (req->type == REQ_READ)
526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
527
528	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529	SvREADONLY_off (req->data);
530
531	if (req->statdata)
532	{
533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
534	PL_laststatval = req->result;
535	PL_statcache = *(req->statdata);
536	}
537
538	req_invoke (req);
539
540	count++;
541	}
542
543	req_free (req);
544	}	856	}
545		857
546	return count;	858	*pathsv = newSVsv (path);
		859	*ptr = SvPVbyte_nolen (*pathsv);
547	}	860	}
548		861
549	static void *aio_proc(void *arg);	862	static void ecb_noinline
550		863	req_set_path1 (aio_req req, SV *path)
551	static void start_thread (void)
552	{	864	{
553	worker *wrk = calloc (1, sizeof (worker));	865	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		866	}
554		867
555	if (!wrk)	868	static void ecb_noinline
556	croak ("unable to allocate worker thread data");	869	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		870	{
		871	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
557		872
558	sigset_t fullsigset, oldsigset;	873	switch (SvTYPE (rv))
559	pthread_attr_t attr;
560
561	pthread_attr_init (&attr);
562	pthread_attr_setstacksize (&attr, STACKSIZE);
563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
564
565	sigfillset (&fullsigset);
566
567	LOCK (wrklock);
568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
569
570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
571	{	874	{
572	wrk->prev = &wrk_first;	875	case SVt_PVIO:
573	wrk->next = wrk_first.next;	876	case SVt_PVLV:
574	wrk_first.next->prev = wrk;	877	case SVt_PVGV:
575	wrk_first.next = wrk;	878	req->type = type_fh;
576	started++;	879	req->sv1 = newSVsv (fh_or_path);
		880	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		881	break;
		882
		883	default:
		884	req->type = type_path;
		885	req_set_path1 (req, fh_or_path);
		886	break;
577	}	887	}
578	else
579	free (wrk);
580
581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
582	UNLOCK (wrklock);
583	}	888	}
584		889
585	static void req_send (aio_req req)	890	XS(boot_IO__AIO) ecb_cold;
586	{
587	while (started < wanted && nreqs >= started)
588	start_thread ();
589		891
590	++nreqs;	892	MODULE = IO::AIO PACKAGE = IO::AIO
591		893
592	LOCK (reqlock);	894	PROTOTYPES: ENABLE
593	reqq_push (&req_queue, req);
594	pthread_cond_signal (&reqwait);
595	UNLOCK (reqlock);
596		895
597	if (nreqs > max_outstanding)	896	BOOT:
598	for (;;)
599	{
600	poll_cb ();
601
602	if (nreqs <= max_outstanding)
603	break;
604
605	poll_wait ();
606	}
607	}
608
609	static void end_thread (void)
610	{	897	{
611	aio_req req;	898	static const struct {
		899	const char *name;
		900	IV iv;
		901	} *civ, const_iv[] = {
		902	# define const_niv(name, value) { # name, (IV) value },
		903	# define const_iv(name) { # name, (IV) name },
		904	# define const_eio(name) { # name, (IV) EIO_ ## name },
612		905
613	Newz (0, req, 1, aio_cb);	906	/* you have to re-run ./gendef0 after adding/removing any constants here */
		907	/* the first block can be undef if missing */
		908	const_iv (ENOSYS)
		909	const_iv (EXDEV)
		910	const_iv (EBADR)
614		911
615	req->type = REQ_QUIT;	912	/* for lseek */
616	req->pri = PRI_MAX + PRI_BIAS;	913	const_iv (SEEK_DATA)
		914	const_iv (SEEK_HOLE)
617		915
618	req_send (req);	916	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
619	}	917	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		918	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		919	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		920	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		921	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
620		922
621	static void min_parallel (int nthreads)	923	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
622	{	924	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
623	if (wanted < nthreads)	925	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
624	wanted = nthreads;	926	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
625	}	927	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
626		928
627	static void max_parallel (int nthreads)	929	/* the second block will be 0 when missing */
628	{	930	const_iv (O_RDONLY)
629	int cur = started;	931	const_iv (O_WRONLY)
		932	const_iv (O_RDWR)
		933	const_iv (O_CREAT)
		934	const_iv (O_TRUNC)
		935	const_iv (O_EXCL)
		936	const_iv (O_APPEND)
630		937
631	if (wanted > nthreads)	938	const_iv (O_ASYNC)
632	wanted = nthreads;	939	const_iv (O_DIRECT)
		940	const_iv (O_NOATIME)
633		941
634	while (cur > wanted)	942	const_iv (O_CLOEXEC)
635	{	943	const_iv (O_NOCTTY)
636	end_thread ();	944	const_iv (O_NOFOLLOW)
637	cur--;	945	const_iv (O_NONBLOCK)
638	}	946	const_iv (O_EXEC)
		947	const_iv (O_SEARCH)
		948	const_iv (O_DIRECTORY)
		949	const_iv (O_DSYNC)
		950	const_iv (O_RSYNC)
		951	const_iv (O_SYNC)
		952	const_iv (O_PATH)
		953	const_iv (O_TMPFILE)
		954	const_iv (O_TTY_INIT)
639		955
640	while (started > wanted)	956	const_iv (S_IFIFO)
641	{	957	const_iv (S_IFCHR)
642	poll_wait ();	958	const_iv (S_IFBLK)
643	poll_cb ();	959	const_iv (S_IFLNK)
644	}	960	const_iv (S_IFREG)
645	}	961	const_iv (S_IFDIR)
		962	const_iv (S_IFWHT)
		963	const_iv (S_IFSOCK)
		964	const_iv (S_IFMT)
646		965
647	static void create_pipe ()	966	const_iv (ST_RDONLY)
648	{	967	const_iv (ST_NOSUID)
649	if (pipe (respipe))	968	const_iv (ST_NODEV)
650	croak ("unable to initialize result pipe");	969	const_iv (ST_NOEXEC)
		970	const_iv (ST_SYNCHRONOUS)
		971	const_iv (ST_MANDLOCK)
		972	const_iv (ST_WRITE)
		973	const_iv (ST_APPEND)
		974	const_iv (ST_IMMUTABLE)
		975	const_iv (ST_NOATIME)
		976	const_iv (ST_NODIRATIME)
		977	const_iv (ST_RELATIME)
651		978
652	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	979	const_iv (PROT_NONE)
653	croak ("cannot set result pipe to nonblocking mode");	980	const_iv (PROT_EXEC)
		981	const_iv (PROT_READ)
		982	const_iv (PROT_WRITE)
654		983
655	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	984	const_iv (MAP_PRIVATE)
656	croak ("cannot set result pipe to nonblocking mode");	985	const_iv (MAP_SHARED)
657	}	986	const_iv (MAP_FIXED)
		987	const_iv (MAP_ANONYMOUS)
658		988
659	/*****************************************************************************/	989	/* linuxish */
660	/* work around various missing functions */	990	const_iv (MAP_LOCKED)
		991	const_iv (MAP_NORESERVE)
		992	const_iv (MAP_POPULATE)
		993	const_iv (MAP_NONBLOCK)
		994	const_iv (MAP_GROWSDOWN)
		995	const_iv (MAP_32BIT)
		996	const_iv (MAP_HUGETLB)
		997	const_iv (MAP_STACK)
661		998
662	#if !HAVE_PREADWRITE	999	const_iv (FIEMAP_FLAG_SYNC)
663	# define pread aio_pread	1000	const_iv (FIEMAP_FLAG_XATTR)
664	# define pwrite aio_pwrite	1001	const_iv (FIEMAP_FLAGS_COMPAT)
		1002	const_iv (FIEMAP_EXTENT_LAST)
		1003	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1004	const_iv (FIEMAP_EXTENT_DELALLOC)
		1005	const_iv (FIEMAP_EXTENT_ENCODED)
		1006	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1007	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1008	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1009	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1010	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1011	const_iv (FIEMAP_EXTENT_MERGED)
		1012	const_iv (FIEMAP_EXTENT_SHARED)
665		1013
666	/*	1014	const_iv (SPLICE_F_MOVE)
667	* make our pread/pwrite safe against themselves, but not against	1015	const_iv (SPLICE_F_NONBLOCK)
668	* normal read/write by using a mutex. slows down execution a lot,	1016	const_iv (SPLICE_F_MORE)
669	* but that's your problem, not mine.	1017	const_iv (SPLICE_F_GIFT)
670	*/
671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
672		1018
673	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1019	/* these are libeio constants, and are independent of gendef0 */
674	{	1020	const_eio (SEEK_SET)
675	ssize_t res;	1021	const_eio (SEEK_CUR)
676	off_t ooffset;	1022	const_eio (SEEK_END)
677		1023
678	LOCK (preadwritelock);	1024	const_eio (MCL_FUTURE)
679	ooffset = lseek (fd, 0, SEEK_CUR);	1025	const_eio (MCL_CURRENT)
680	lseek (fd, offset, SEEK_SET);
681	res = read (fd, buf, count);
682	lseek (fd, ooffset, SEEK_SET);
683	UNLOCK (preadwritelock);
684		1026
685	return res;	1027	const_eio (MS_ASYNC)
686	}	1028	const_eio (MS_INVALIDATE)
		1029	const_eio (MS_SYNC)
687		1030
688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1031	const_eio (MT_MODIFY)
689	{
690	ssize_t res;
691	off_t ooffset;
692		1032
693	LOCK (preadwritelock);	1033	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
694	ooffset = lseek (fd, 0, SEEK_CUR);	1034	const_eio (SYNC_FILE_RANGE_WRITE)
695	lseek (fd, offset, SEEK_SET);	1035	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
696	res = write (fd, buf, count);
697	lseek (fd, offset, SEEK_SET);
698	UNLOCK (preadwritelock);
699		1036
700	return res;	1037	const_eio (FALLOC_FL_KEEP_SIZE)
701	}	1038	const_eio (FALLOC_FL_PUNCH_HOLE)
702	#endif	1039	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1040	const_eio (FALLOC_FL_ZERO_RANGE)
703		1041
704	#if !HAVE_FDATASYNC	1042	const_eio (READDIR_DENTS)
705	# define fdatasync fsync	1043	const_eio (READDIR_DIRS_FIRST)
706	#endif	1044	const_eio (READDIR_STAT_ORDER)
		1045	const_eio (READDIR_FOUND_UNKNOWN)
707		1046
708	#if !HAVE_READAHEAD	1047	const_eio (DT_UNKNOWN)
709	# define readahead aio_readahead	1048	const_eio (DT_FIFO)
710		1049	const_eio (DT_CHR)
711	static ssize_t readahead (int fd, off_t offset, size_t count)	1050	const_eio (DT_DIR)
712	{	1051	const_eio (DT_BLK)
713	dBUF;	1052	const_eio (DT_REG)
714		1053	const_eio (DT_LNK)
715	while (count > 0)	1054	const_eio (DT_SOCK)
716	{	1055	const_eio (DT_WHT)
717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
718
719	pread (fd, aio_buf, len, offset);
720	offset += len;
721	count -= len;
722	}
723
724	errno = 0;
725	}
726	#endif
727
728	#if !HAVE_READDIR_R
729	# define readdir_r aio_readdir_r
730
731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
732
733	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
734	{
735	struct dirent *e;
736	int errorno;
737
738	LOCK (readdirlock);
739
740	e = readdir (dirp);
741	errorno = errno;
742
743	if (e)
744	{
745	*res = ent;
746	strcpy (ent->d_name, e->d_name);
747	}
748	else
749	*res = 0;
750
751	UNLOCK (readdirlock);
752
753	errno = errorno;
754	return e ? 0 : -1;
755	}
756	#endif
757
758	/* sendfile always needs emulation */
759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
760	{
761	ssize_t res;
762
763	if (!count)
764	return 0;
765
766	#if HAVE_SENDFILE
767	# if __linux
768	res = sendfile (ofd, ifd, &offset, count);
769
770	# elif __freebsd
771	/*
772	* Of course, the freebsd sendfile is a dire hack with no thoughts
773	* wasted on making it similar to other I/O functions.
774	*/
775	{
776	off_t sbytes;
777	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778
779	if (res < 0 && sbytes)
780	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
781	res = sbytes;
782	}	1056	};
783		1057
784	# elif __hpux	1058	aio_stash = gv_stashpv ("IO::AIO" , 1);
785	res = sendfile (ofd, ifd, offset, count, 0, 0);	1059	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1060	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1061	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
786		1062
787	# elif __solaris	1063	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
788	{	1064	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
789	struct sendfilevec vec;
790	size_t sbytes;
791		1065
792	vec.sfv_fd = ifd;	1066	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
793	vec.sfv_flag = 0;
794	vec.sfv_off = offset;
795	vec.sfv_len = count;
796		1067
797	res = sendfilev (ofd, &vec, 1, &sbytes);	1068	reinit ();
		1069	}
798		1070
799	if (res < 0 && sbytes)	1071	void
		1072	reinit ()
		1073	PROTOTYPE:
		1074
		1075	void
		1076	max_poll_reqs (unsigned int nreqs)
		1077	PROTOTYPE: $
		1078	CODE:
		1079	eio_set_max_poll_reqs (nreqs);
		1080
		1081	void
		1082	max_poll_time (double nseconds)
		1083	PROTOTYPE: $
		1084	CODE:
		1085	eio_set_max_poll_time (nseconds);
		1086
		1087	void
		1088	min_parallel (unsigned int nthreads)
		1089	PROTOTYPE: $
		1090	CODE:
		1091	eio_set_min_parallel (nthreads);
		1092
		1093	void
		1094	max_parallel (unsigned int nthreads)
		1095	PROTOTYPE: $
		1096	CODE:
		1097	eio_set_max_parallel (nthreads);
		1098
		1099	void
		1100	max_idle (unsigned int nthreads)
		1101	PROTOTYPE: $
		1102	CODE:
		1103	eio_set_max_idle (nthreads);
		1104
		1105	void
		1106	idle_timeout (unsigned int seconds)
		1107	PROTOTYPE: $
		1108	CODE:
		1109	eio_set_idle_timeout (seconds);
		1110
		1111	void
		1112	max_outstanding (unsigned int maxreqs)
		1113	PROTOTYPE: $
		1114	CODE:
		1115	max_outstanding = maxreqs;
		1116
		1117	void
		1118	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1119	PPCODE:
		1120	{
		1121	dREQ;
		1122
		1123	req->type = EIO_WD_OPEN;
		1124	req_set_path1 (req, pathname);
		1125
		1126	REQ_SEND;
		1127	}
		1128
		1129	void
		1130	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1131	PPCODE:
		1132	{
		1133	dREQ;
		1134
		1135	req->type = EIO_OPEN;
		1136	req_set_path1 (req, pathname);
		1137	req->int1 = flags;
		1138	req->int2 = mode;
		1139
		1140	REQ_SEND;
		1141	}
		1142
		1143	void
		1144	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1145	ALIAS:
		1146	aio_fsync = EIO_FSYNC
		1147	aio_fdatasync = EIO_FDATASYNC
		1148	aio_syncfs = EIO_SYNCFS
		1149	PPCODE:
		1150	{
		1151	int fd = s_fileno_croak (fh, 0);
		1152	dREQ;
		1153
		1154	req->type = ix;
		1155	req->sv1 = newSVsv (fh);
		1156	req->int1 = fd;
		1157
		1158	REQ_SEND;
		1159	}
		1160
		1161	void
		1162	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1163	PPCODE:
		1164	{
		1165	int fd = s_fileno_croak (fh, 0);
		1166	dREQ;
		1167
		1168	req->type = EIO_SYNC_FILE_RANGE;
		1169	req->sv1 = newSVsv (fh);
		1170	req->int1 = fd;
		1171	req->offs = offset;
800	res = sbytes;	1172	req->size = nbytes;
801	}	1173	req->int2 = flags;
802		1174
803	# endif	1175	REQ_SEND;
		1176	}
		1177
		1178	void
		1179	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1180	PPCODE:
		1181	{
		1182	int fd = s_fileno_croak (fh, 0);
		1183	dREQ;
		1184
		1185	req->type = EIO_FALLOCATE;
		1186	req->sv1 = newSVsv (fh);
		1187	req->int1 = fd;
		1188	req->int2 = mode;
		1189	req->offs = offset;
		1190	req->size = len;
		1191
		1192	REQ_SEND;
		1193	}
		1194
		1195	void
		1196	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1197	PPCODE:
		1198	{
		1199	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1200	int fd = s_fileno_croak (fh, 0);
		1201	dREQ;
		1202
		1203	if (expect_false (close_fd < 0))
		1204	{
		1205	int pipefd [2];
		1206
		1207	if (
		1208	#ifdef _WIN32
		1209	_pipe (pipefd, 1, _O_BINARY) < 0
804	#else	1210	#else
805	res = -1;	1211	pipe (pipefd) < 0
806	errno = ENOSYS;	1212	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
807	#endif	1213	#endif
808		1214	|| close (pipefd [1]) < 0
809	if (res < 0
810	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
811	#if __solaris
812	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
813	#endif
814	)
815	)
816	{
817	/* emulate sendfile. this is a major pain in the ass */
818	dBUF;
819
820	res = 0;
821
822	while (count)
823	{
824	ssize_t cnt;
825
826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
827
828	if (cnt <= 0)
829	{	1215	)
830	if (cnt && !res) res = -1;	1216	abort (); /*D*/
831	break;
832	}
833		1217
834	cnt = write (ofd, aio_buf, cnt);	1218	close_fd = pipefd [0];
835
836	if (cnt <= 0)
837	{
838	if (cnt && !res) res = -1;
839	break;
840	}
841
842	offset += cnt;
843	res += cnt;
844	count -= cnt;
845	}
846	}
847
848	return res;
849	}
850
851	/* read a full directory */
852	static void scandir_ (aio_req req, worker *self)
853	{
854	DIR *dirp;
855	union
856	{
857	struct dirent d;
858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
859	} *u;
860	struct dirent *entp;
861	char *name, *names;
862	int memlen = 4096;
863	int memofs = 0;
864	int res = 0;
865	int errorno;
866
867	LOCK (wrklock);
868	self->dirp = dirp = opendir (req->dataptr);
869	self->dbuf = u = malloc (sizeof (*u));
870	UNLOCK (wrklock);
871
872	req->data2ptr = names = malloc (memlen);
873
874	if (dirp && u && names)
875	for (;;)
876	{
877	errno = 0;
878	readdir_r (dirp, &u->d, &entp);
879
880	if (!entp)
881	break;
882
883	name = entp->d_name;
884
885	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
886	{
887	int len = strlen (name) + 1;
888
889	res++;
890
891	while (memofs + len > memlen)
892	{
893	memlen *= 2;
894	LOCK (wrklock);
895	req->data2ptr = names = realloc (names, memlen);
896	UNLOCK (wrklock);
897
898	if (!names)
899	break;
900	}
901
902	memcpy (names + memofs, name, len);
903	memofs += len;
904	}	1219	}
905	}
906		1220
907	if (errno)	1221	req->type = EIO_DUP2;
908	res = -1;	1222	req->int1 = close_fd;
909		1223	req->sv2 = newSVsv (fh);
910	req->result = res;	1224	req->int2 = fd;
911	}
912		1225
913	/*****************************************************************************/	1226	REQ_SEND;
914
915	static void *aio_proc (void *thr_arg)
916	{
917	aio_req req;
918	int type;
919	worker *self = (worker *)thr_arg;
920
921	do
922	{
923	LOCK (reqlock);
924
925	for (;;)
926	{
927	self->req = req = reqq_shift (&req_queue);
928
929	if (req)
930	break;
931
932	pthread_cond_wait (&reqwait, &reqlock);
933	}
934
935	UNLOCK (reqlock);
936
937	errno = 0; /* strictly unnecessary */
938	type = req->type; /* remember type for QUIT check */
939
940	if (!(req->flags & FLAG_CANCELLED))
941	switch (type)
942	{
943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
945
946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
948
949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
952
953	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
954	case REQ_CLOSE: req->result = close (req->fd); break;
955	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
956	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
957	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
960
961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
962	case REQ_FSYNC: req->result = fsync (req->fd); break;
963	case REQ_READDIR: scandir_ (req, self); break;
964
965	case REQ_BUSY:
966	{
967	struct timeval tv;
968
969	tv.tv_sec = req->fd;
970	tv.tv_usec = req->fd2;
971
972	req->result = select (0, 0, 0, 0, &tv);
973	}
974
975	case REQ_GROUP:
976	case REQ_NOP:
977	case REQ_QUIT:
978	break;
979
980	default:
981	req->result = ENOSYS;
982	break;
983	}
984
985	req->errorno = errno;
986
987	LOCK (reslock);
988
989	if (!reqq_push (&res_queue, req))
990	/* write a dummy byte to the pipe so fh becomes ready */
991	write (respipe [1], &respipe, 1);
992
993	self->req = 0;
994	worker_clear (self);
995
996	UNLOCK (reslock);
997	}
998	while (type != REQ_QUIT);
999
1000	LOCK (wrklock);
1001	worker_free (self);
1002	UNLOCK (wrklock);
1003
1004	return 0;
1005	}	1227	}
1006		1228
1007	/*****************************************************************************/
1008
1009	static void atfork_prepare (void)
1010	{
1011	LOCK (wrklock);
1012	LOCK (reqlock);
1013	LOCK (reslock);
1014	#if !HAVE_PREADWRITE
1015	LOCK (preadwritelock);
1016	#endif
1017	#if !HAVE_READDIR_R
1018	LOCK (readdirlock);
1019	#endif
1020	}
1021
1022	static void atfork_parent (void)
1023	{
1024	#if !HAVE_READDIR_R
1025	UNLOCK (readdirlock);
1026	#endif
1027	#if !HAVE_PREADWRITE
1028	UNLOCK (preadwritelock);
1029	#endif
1030	UNLOCK (reslock);
1031	UNLOCK (reqlock);
1032	UNLOCK (wrklock);
1033	}
1034
1035	static void atfork_child (void)
1036	{
1037	aio_req prv;
1038
1039	while (prv = reqq_shift (&req_queue))
1040	req_free (prv);
1041
1042	while (prv = reqq_shift (&res_queue))
1043	req_free (prv);
1044
1045	while (wrk_first.next != &wrk_first)
1046	{
1047	worker *wrk = wrk_first.next;
1048
1049	if (wrk->req)
1050	req_free (wrk->req);
1051
1052	worker_clear (wrk);
1053	worker_free (wrk);
1054	}
1055
1056	started = 0;
1057	nreqs = 0;
1058
1059	close (respipe [0]);
1060	close (respipe [1]);
1061	create_pipe ();
1062
1063	atfork_parent ();
1064	}
1065
1066	#define dREQ \
1067	aio_req req; \
1068	int req_pri = next_pri; \
1069	next_pri = DEFAULT_PRI + PRI_BIAS; \
1070	\
1071	if (SvOK (callback) && !SvROK (callback)) \
1072	croak ("callback must be undef or of reference type"); \
1073	\
1074	Newz (0, req, 1, aio_cb); \
1075	if (!req) \
1076	croak ("out of memory during aio_req allocation"); \
1077	\
1078	req->callback = newSVsv (callback); \
1079	req->pri = req_pri
1080
1081	#define REQ_SEND \
1082	req_send (req); \
1083	\
1084	if (GIMME_V != G_VOID) \
1085	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1086
1087	MODULE = IO::AIO PACKAGE = IO::AIO
1088
1089	PROTOTYPES: ENABLE
1090
1091	BOOT:
1092	{
1093	HV *stash = gv_stashpv ("IO::AIO", 1);
1094	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1095	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1096	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1097
1098	create_pipe ();
1099	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1100	}
1101
1102	void	1229	void
1103	min_parallel (nthreads)	1230	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1104	int nthreads
1105	PROTOTYPE: $
1106
1107	void
1108	max_parallel (nthreads)
1109	int nthreads
1110	PROTOTYPE: $
1111
1112	int
1113	max_outstanding (nreqs)
1114	int nreqs
1115	PROTOTYPE: $
1116	CODE:	1231	PPCODE:
1117	RETVAL = max_outstanding;
1118	max_outstanding = nreqs;
1119
1120	void
1121	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1122	SV * pathname
1123	int flags
1124	int mode
1125	SV * callback
1126	PROTOTYPE: $$$;$
1127	PPCODE:
1128	{	1232	{
		1233	int fd = s_fileno_croak (fh, 0);
1129	dREQ;	1234	dREQ;
1130		1235
1131	req->type = REQ_OPEN;	1236	req->type = EIO_SEEK;
1132	req->data = newSVsv (pathname);	1237	req->sv1 = newSVsv (fh);
1133	req->dataptr = SvPVbyte_nolen (req->data);	1238	req->int1 = fd;
1134	req->fd = flags;	1239	req->offs = SvVAL64 (offset);
1135	req->mode = mode;	1240	req->int2 = whence;
1136		1241
1137	REQ_SEND;	1242	REQ_SEND;
1138	}	1243	}
1139		1244
1140	void	1245	void
1141	aio_close (fh,callback=&PL_sv_undef)	1246	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1142	SV * fh
1143	SV * callback
1144	PROTOTYPE: $;$
1145	ALIAS:	1247	ALIAS:
1146	aio_close = REQ_CLOSE
1147	aio_fsync = REQ_FSYNC
1148	aio_fdatasync = REQ_FDATASYNC
1149	PPCODE:
1150	{
1151	dREQ;
1152
1153	req->type = ix;
1154	req->fh = newSVsv (fh);
1155	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1156
1157	REQ_SEND (req);
1158	}
1159
1160	void
1161	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1162	SV * fh
1163	UV offset
1164	UV length
1165	SV * data
1166	UV dataoffset
1167	SV * callback
1168	ALIAS:
1169	aio_read = REQ_READ	1248	aio_read = EIO_READ
1170	aio_write = REQ_WRITE	1249	aio_write = EIO_WRITE
1171	PROTOTYPE: $$$$$;$
1172	PPCODE:	1250	PPCODE:
1173	{	1251	{
1174	aio_req req;
1175	STRLEN svlen;	1252	STRLEN svlen;
		1253	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1176	char *svptr = SvPVbyte (data, svlen);	1254	char *svptr = SvPVbyte (data, svlen);
1177		1255	UV len = SvUV (length);
1178	SvUPGRADE (data, SVt_PV);
1179	SvPOK_on (data);
1180		1256
1181	if (dataoffset < 0)	1257	if (dataoffset < 0)
1182	dataoffset += svlen;	1258	dataoffset += svlen;
1183		1259
1184	if (dataoffset < 0 || dataoffset > svlen)	1260	if (dataoffset < 0 || dataoffset > svlen)
1185	croak ("data offset outside of string");	1261	croak ("dataoffset outside of data scalar");
1186		1262
1187	if (ix == REQ_WRITE)	1263	if (ix == EIO_WRITE)
1188	{	1264	{
1189	/* write: check length and adjust. */	1265	/* write: check length and adjust. */
1190	if (length < 0 || length + dataoffset > svlen)	1266	if (!SvOK (length) || len + dataoffset > svlen)
1191	length = svlen - dataoffset;	1267	len = svlen - dataoffset;
1192	}	1268	}
1193	else	1269	else
1194	{	1270	{
1195	/* read: grow scalar as necessary */	1271	/* read: check type and grow scalar as necessary */
		1272	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1196	svptr = SvGROW (data, length + dataoffset);	1273	svptr = sv_grow (data, len + dataoffset + 1);
		1274	else if (SvCUR (data) < len + dataoffset)
		1275	croak ("length + dataoffset outside of scalar, and cannot grow");
1197	}	1276	}
1198
1199	if (length < 0)
1200	croak ("length must not be negative");
1201		1277
1202	{	1278	{
1203	dREQ;	1279	dREQ;
1204		1280
1205	req->type = ix;	1281	req->type = ix;
1206	req->fh = newSVsv (fh);	1282	req->sv1 = newSVsv (fh);
1207	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1283	req->int1 = fd;
1208	: IoOFP (sv_2io (fh)));	1284	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1209	req->offset = offset;	1285	req->size = len;
1210	req->length = length;
1211	req->data = SvREFCNT_inc (data);	1286	req->sv2 = SvREFCNT_inc (data);
1212	req->dataptr = (char *)svptr + dataoffset;	1287	req->ptr2 = (char *)svptr + dataoffset;
		1288	req->stroffset = dataoffset;
1213		1289
1214	if (!SvREADONLY (data))	1290	if (!SvREADONLY (data))
1215	{	1291	{
1216	SvREADONLY_on (data);	1292	SvREADONLY_on (data);
1217	req->data2ptr = (void *)data;	1293	req->flags |= FLAG_SV2_RO_OFF;
1218	}	1294	}
1219		1295
1220	REQ_SEND;	1296	REQ_SEND;
1221	}	1297	}
1222	}	1298	}
1223		1299
1224	void	1300	void
1225	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1301	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1226	SV * out_fh	1302	ALIAS:
1227	SV * in_fh	1303	aio_readlink = EIO_READLINK
1228	UV in_offset	1304	aio_realpath = EIO_REALPATH
1229	UV length
1230	SV * callback
1231	PROTOTYPE: $$$$;$
1232	PPCODE:	1305	PPCODE:
1233	{	1306	{
		1307	dREQ;
		1308
		1309	req->type = ix;
		1310	req_set_path1 (req, pathname);
		1311
		1312	REQ_SEND;
		1313	}
		1314
		1315	void
		1316	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1317	PPCODE:
		1318	{
		1319	int ifd = s_fileno_croak (in_fh , 0);
		1320	int ofd = s_fileno_croak (out_fh, 1);
1234	dREQ;	1321	dREQ;
1235		1322
1236	req->type = REQ_SENDFILE;	1323	req->type = EIO_SENDFILE;
1237	req->fh = newSVsv (out_fh);	1324	req->sv1 = newSVsv (out_fh);
1238	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1325	req->int1 = ofd;
1239	req->fh2 = newSVsv (in_fh);	1326	req->sv2 = newSVsv (in_fh);
1240	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1327	req->int2 = ifd;
1241	req->offset = in_offset;	1328	req->offs = in_offset;
1242	req->length = length;	1329	req->size = length;
1243		1330
1244	REQ_SEND;	1331	REQ_SEND;
1245	}	1332	}
1246		1333
1247	void	1334	void
1248	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1335	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1249	SV * fh
1250	UV offset
1251	IV length
1252	SV * callback
1253	PROTOTYPE: $$$;$
1254	PPCODE:	1336	PPCODE:
1255	{	1337	{
		1338	int fd = s_fileno_croak (fh, 0);
1256	dREQ;	1339	dREQ;
1257		1340
1258	req->type = REQ_READAHEAD;	1341	req->type = EIO_READAHEAD;
1259	req->fh = newSVsv (fh);	1342	req->sv1 = newSVsv (fh);
1260	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1343	req->int1 = fd;
1261	req->offset = offset;	1344	req->offs = offset;
1262	req->length = length;	1345	req->size = length;
1263		1346
1264	REQ_SEND;	1347	REQ_SEND;
1265	}	1348	}
1266		1349
1267	void	1350	void
1268	aio_stat (fh_or_path,callback=&PL_sv_undef)	1351	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1269	SV * fh_or_path
1270	SV * callback
1271	ALIAS:	1352	ALIAS:
1272	aio_stat = REQ_STAT	1353	aio_stat = EIO_STAT
1273	aio_lstat = REQ_LSTAT	1354	aio_lstat = EIO_LSTAT
		1355	aio_statvfs = EIO_STATVFS
1274	PPCODE:	1356	PPCODE:
1275	{	1357	{
1276	dREQ;	1358	dREQ;
1277		1359
1278	New (0, req->statdata, 1, Stat_t);	1360	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1279	if (!req->statdata)
1280	{
1281	req_free (req);
1282	croak ("out of memory during aio_req->statdata allocation");
1283	}
1284
1285	if (SvPOK (fh_or_path))
1286	{
1287	req->type = ix;
1288	req->data = newSVsv (fh_or_path);
1289	req->dataptr = SvPVbyte_nolen (req->data);
1290	}
1291	else
1292	{
1293	req->type = REQ_FSTAT;
1294	req->fh = newSVsv (fh_or_path);
1295	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1296	}
1297		1361
1298	REQ_SEND;	1362	REQ_SEND;
1299	}	1363	}
1300		1364
		1365	UV
		1366	major (UV dev)
		1367	ALIAS:
		1368	minor = 1
		1369	CODE:
		1370	RETVAL = ix ? major (dev) : minor (dev);
		1371	OUTPUT:
		1372	RETVAL
		1373
		1374	UV
		1375	makedev (UV maj, UV min)
		1376	CODE:
		1377	RETVAL = makedev (maj, min);
		1378	OUTPUT:
		1379	RETVAL
		1380
1301	void	1381	void
		1382	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1383	PPCODE:
		1384	{
		1385	dREQ;
		1386
		1387	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1388	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1389	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1390
		1391	REQ_SEND;
		1392	}
		1393
		1394	void
		1395	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1396	PPCODE:
		1397	{
		1398	dREQ;
		1399
		1400	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1401	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1402
		1403	REQ_SEND;
		1404	}
		1405
		1406	void
		1407	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1408	PPCODE:
		1409	{
		1410	dREQ;
		1411
		1412	req->int2 = mode;
		1413	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1414
		1415	REQ_SEND;
		1416	}
		1417
		1418	void
		1419	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	dREQ;
		1423
		1424	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1425	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1426	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1427
		1428	REQ_SEND;
		1429	}
		1430
		1431	void
		1432	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1433	PPCODE:
		1434	{
		1435	dREQ;
		1436
		1437	req->type = EIO_READDIR;
		1438	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1439
		1440	if (flags & EIO_READDIR_DENTS)
		1441	req->int1 |= EIO_READDIR_CUSTOM2;
		1442
		1443	req_set_path1 (req, pathname);
		1444
		1445	REQ_SEND;
		1446	}
		1447
		1448	void
		1449	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1450	PPCODE:
		1451	{
		1452	dREQ;
		1453
		1454	req->type = EIO_MKDIR;
		1455	req->int2 = mode;
		1456	req_set_path1 (req, pathname);
		1457
		1458	REQ_SEND;
		1459	}
		1460
		1461	void
1302	aio_unlink (pathname,callback=&PL_sv_undef)	1462	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1303	SV * pathname
1304	SV * callback
1305	ALIAS:	1463	ALIAS:
1306	aio_unlink = REQ_UNLINK	1464	aio_unlink = EIO_UNLINK
1307	aio_rmdir = REQ_RMDIR	1465	aio_rmdir = EIO_RMDIR
1308	aio_readdir = REQ_READDIR	1466	aio_readdir = EIO_READDIR
1309	PPCODE:	1467	PPCODE:
1310	{	1468	{
1311	dREQ;	1469	dREQ;
1312		1470
1313	req->type = ix;	1471	req->type = ix;
1314	req->data = newSVsv (pathname);	1472	req_set_path1 (req, pathname);
1315	req->dataptr = SvPVbyte_nolen (req->data);	1473
1316
1317	REQ_SEND;	1474	REQ_SEND;
1318	}	1475	}
1319		1476
1320	void	1477	void
1321	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1478	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1322	SV * oldpath
1323	SV * newpath
1324	SV * callback
1325	ALIAS:	1479	ALIAS:
1326	aio_link = REQ_LINK	1480	aio_link = EIO_LINK
1327	aio_symlink = REQ_SYMLINK	1481	aio_symlink = EIO_SYMLINK
1328	aio_rename = REQ_RENAME	1482	aio_rename = EIO_RENAME
1329	PPCODE:	1483	PPCODE:
1330	{	1484	{
		1485	eio_wd wd2 = 0;
1331	dREQ;	1486	dREQ;
1332		1487
1333	req->type = ix;	1488	req->type = ix;
1334	req->fh = newSVsv (oldpath);	1489	req_set_path1 (req, oldpath);
1335	req->data2ptr = SvPVbyte_nolen (req->fh);	1490	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1336	req->data = newSVsv (newpath);	1491	req->int3 = (long)wd2;
1337	req->dataptr = SvPVbyte_nolen (req->data);
1338		1492
1339	REQ_SEND;	1493	REQ_SEND;
1340	}	1494	}
1341		1495
1342	void	1496	void
1343	aio_busy (delay,callback=&PL_sv_undef)	1497	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1344	double delay
1345	SV * callback
1346	PPCODE:	1498	PPCODE:
1347	{	1499	{
1348	dREQ;	1500	dREQ;
1349		1501
1350	req->type = REQ_BUSY;	1502	req->type = EIO_MKNOD;
1351	req->fd = delay < 0. ? 0 : delay;	1503	req->int2 = (mode_t)mode;
1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1504	req->offs = dev;
1353		1505	req_set_path1 (req, pathname);
		1506
1354	REQ_SEND;	1507	REQ_SEND;
1355	}	1508	}
1356		1509
1357	void	1510	void
1358	aio_group (callback=&PL_sv_undef)	1511	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback = &PL_sv_undef)
1359	SV * callback	1512	ALIAS:
1360	PROTOTYPE: ;$	1513	aio_mtouch = EIO_MTOUCH
		1514	aio_msync = EIO_MSYNC
1361	PPCODE:	1515	PPCODE:
1362	{	1516	{
		1517	STRLEN svlen;
		1518	char *svptr = SvPVbyte (data, svlen);
		1519	UV len = SvUV (length);
		1520
		1521	if (offset < 0)
		1522	offset += svlen;
		1523
		1524	if (offset < 0 || offset > svlen)
		1525	croak ("offset outside of scalar");
		1526
		1527	if (!SvOK (length) || len + offset > svlen)
		1528	len = svlen - offset;
		1529
		1530	{
		1531	dREQ;
		1532
		1533	req->type = ix;
		1534	req->sv2 = SvREFCNT_inc (data);
		1535	req->ptr2 = (char *)svptr + offset;
		1536	req->size = len;
		1537	req->int1 = flags;
		1538
		1539	REQ_SEND;
		1540	}
		1541	}
		1542
		1543	void
		1544	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1545	PPCODE:
		1546	{
		1547	STRLEN svlen;
		1548	char *svptr = SvPVbyte (data, svlen);
		1549	UV len = SvUV (length);
		1550
		1551	if (offset < 0)
		1552	offset += svlen;
		1553
		1554	if (offset < 0 || offset > svlen)
		1555	croak ("offset outside of scalar");
		1556
		1557	if (!SvOK (length) || len + offset > svlen)
		1558	len = svlen - offset;
		1559
		1560	{
		1561	dREQ;
		1562
		1563	req->type = EIO_MLOCK;
		1564	req->sv2 = SvREFCNT_inc (data);
		1565	req->ptr2 = (char *)svptr + offset;
		1566	req->size = len;
		1567
		1568	REQ_SEND;
		1569	}
		1570	}
		1571
		1572	void
		1573	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1574	PPCODE:
		1575	{
		1576	dREQ;
		1577
		1578	req->type = EIO_MLOCKALL;
		1579	req->int1 = flags;
		1580
		1581	REQ_SEND;
		1582	}
		1583
		1584	void
		1585	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1586	PPCODE:
		1587	{
		1588	int fd = s_fileno_croak (fh, 0);
1363	dREQ;	1589	dREQ;
1364		1590
1365	req->type = REQ_GROUP;	1591	req->type = EIO_CUSTOM;
1366	req_send (req);	1592	req->sv1 = newSVsv (fh);
		1593	req->int1 = fd;
1367		1594
1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1595	req->feed = fiemap;
1369	}	1596	#if HAVE_FIEMAP
		1597	/* keep our fingers crossed that the next two types are 64 bit */
		1598	req->offs = start;
		1599	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1600	req->int2 = flags;
		1601	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1602	#endif
1370		1603
		1604	REQ_SEND;
		1605	}
		1606
1371	void	1607	void
1372	aio_nop (callback=&PL_sv_undef)	1608	aio_busy (double delay, SV *callback = &PL_sv_undef)
1373	SV * callback
1374	PPCODE:	1609	PPCODE:
1375	{	1610	{
1376	dREQ;	1611	dREQ;
1377		1612
1378	req->type = REQ_NOP;	1613	req->type = EIO_BUSY;
		1614	req->nv1 = delay < 0. ? 0. : delay;
1379		1615
1380	REQ_SEND;	1616	REQ_SEND;
1381	}	1617	}
1382		1618
1383	void	1619	void
1384	aioreq_pri (int pri = DEFAULT_PRI)	1620	aio_group (SV *callback = &PL_sv_undef)
1385	CODE:	1621	PPCODE:
		1622	{
		1623	dREQ;
		1624
		1625	req->type = EIO_GROUP;
		1626
		1627	PUTBACK;
		1628	req_submit (req);
		1629	SPAGAIN;
		1630
		1631	XPUSHs (req_sv (req, aio_grp_stash));
		1632	}
		1633
		1634	void
		1635	aio_nop (SV *callback = &PL_sv_undef)
		1636	ALIAS:
		1637	aio_nop = EIO_NOP
		1638	aio_sync = EIO_SYNC
		1639	PPCODE:
		1640	{
		1641	dREQ;
		1642
		1643	req->type = ix;
		1644
		1645	REQ_SEND;
		1646	}
		1647
		1648	int
		1649	aioreq_pri (int pri = NO_INIT)
		1650	CODE:
		1651	RETVAL = next_pri;
		1652	if (items > 0)
		1653	{
1386	if (pri < PRI_MIN) pri = PRI_MIN;	1654	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1387	if (pri > PRI_MAX) pri = PRI_MAX;	1655	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1388	next_pri = pri + PRI_BIAS;	1656	next_pri = pri;
		1657	}
		1658	OUTPUT:
		1659	RETVAL
1389		1660
1390	void	1661	void
1391	aioreq_nice (int nice = 0)	1662	aioreq_nice (int nice = 0)
1392	CODE:	1663	CODE:
1393	nice = next_pri - nice;	1664	nice = next_pri - nice;
1394	if (nice < PRI_MIN) nice = PRI_MIN;	1665	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1395	if (nice > PRI_MAX) nice = PRI_MAX;	1666	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1396	next_pri = nice + PRI_BIAS;	1667	next_pri = nice;
1397		1668
1398	void	1669	void
1399	flush ()	1670	flush ()
1400	PROTOTYPE:
1401	CODE:	1671	CODE:
1402	while (nreqs)	1672	while (eio_nreqs ())
1403	{	1673	{
1404	poll_wait ();	1674	poll_wait ();
1405	poll_cb ();	1675	poll_cb ();
1406	}	1676	}
1407		1677
1408	void	1678	int
1409	poll()	1679	poll ()
1410	PROTOTYPE:
1411	CODE:	1680	CODE:
1412	if (nreqs)
1413	{
1414	poll_wait ();	1681	poll_wait ();
1415	poll_cb ();	1682	RETVAL = poll_cb ();
1416	}
1417
1418	int
1419	poll_fileno()
1420	PROTOTYPE:
1421	CODE:
1422	RETVAL = respipe [0];
1423	OUTPUT:	1683	OUTPUT:
1424	RETVAL	1684	RETVAL
1425		1685
1426	int	1686	int
		1687	poll_fileno ()
		1688	CODE:
		1689	RETVAL = s_epipe_fd (&respipe);
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	int
1427	poll_cb(...)	1694	poll_cb (...)
1428	PROTOTYPE:	1695	PROTOTYPE:
1429	CODE:	1696	CODE:
1430	RETVAL = poll_cb ();	1697	RETVAL = poll_cb ();
1431	OUTPUT:	1698	OUTPUT:
1432	RETVAL	1699	RETVAL
1433		1700
1434	void	1701	void
1435	poll_wait()	1702	poll_wait ()
1436	PROTOTYPE:
1437	CODE:	1703	CODE:
1438	if (nreqs)
1439	poll_wait ();	1704	poll_wait ();
1440		1705
1441	int	1706	int
1442	nreqs()	1707	nreqs ()
1443	PROTOTYPE:
1444	CODE:	1708	CODE:
1445	RETVAL = nreqs;	1709	RETVAL = eio_nreqs ();
1446	OUTPUT:	1710	OUTPUT:
1447	RETVAL	1711	RETVAL
1448		1712
		1713	int
		1714	nready ()
		1715	CODE:
		1716	RETVAL = eio_nready ();
		1717	OUTPUT:
		1718	RETVAL
		1719
		1720	int
		1721	npending ()
		1722	CODE:
		1723	RETVAL = eio_npending ();
		1724	OUTPUT:
		1725	RETVAL
		1726
		1727	int
		1728	nthreads ()
		1729	CODE:
		1730	RETVAL = eio_nthreads ();
		1731	OUTPUT:
		1732	RETVAL
		1733
		1734	int
		1735	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1736	CODE:
		1737	RETVAL = posix_fadvise (fh, offset, length, advice);
		1738	OUTPUT:
		1739	RETVAL
		1740
		1741	IV
		1742	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1743	CODE:
		1744	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1745	OUTPUT:
		1746	RETVAL
		1747
		1748	void
		1749	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1750	PPCODE:
		1751	sv_unmagic (scalar, MMAP_MAGIC);
		1752	{
		1753	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1754	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1755	if (addr == (void *)-1)
		1756	XSRETURN_NO;
		1757
		1758	sv_force_normal (scalar);
		1759
		1760	/* we store the length in mg_obj, as namlen is I32 :/ */
		1761	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1762	->mg_obj = (SV *)length;
		1763
		1764	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1765
		1766	if (!(prot & PROT_WRITE))
		1767	SvREADONLY_on (scalar);
		1768
		1769	if (SvLEN (scalar))
		1770	Safefree (SvPVX (scalar));
		1771
		1772	SvPVX (scalar) = (char *)addr;
		1773	SvCUR_set (scalar, length);
		1774	SvLEN_set (scalar, 0);
		1775	SvPOK_only (scalar);
		1776
		1777	XSRETURN_YES;
		1778	}
		1779
		1780	void
		1781	munmap (SV *scalar)
		1782	CODE:
		1783	sv_unmagic (scalar, MMAP_MAGIC);
		1784
		1785	int
		1786	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1787	ALIAS:
		1788	mprotect = 1
		1789	CODE:
		1790	{
		1791	STRLEN svlen;
		1792	void *addr = SvPVbyte (scalar, svlen);
		1793	STRLEN len = SvUV (length);
		1794
		1795	if (offset < 0)
		1796	offset += svlen;
		1797
		1798	if (offset < 0 || offset > svlen)
		1799	croak ("offset outside of scalar");
		1800
		1801	if (!SvOK (length) || len + offset > svlen)
		1802	len = svlen - offset;
		1803
		1804	addr = (void *)(((intptr_t)addr) + offset);
		1805	eio_page_align (&addr, &len);
		1806
		1807	switch (ix)
		1808	{
		1809	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1810	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1811	}
		1812	}
		1813	OUTPUT:
		1814	RETVAL
		1815
		1816	int
		1817	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1818	CODE:
		1819	{
		1820	STRLEN svlen;
		1821	void *addr = SvPVbyte (scalar, svlen);
		1822	size_t len = SvUV (length);
		1823
		1824	if (offset < 0)
		1825	offset += svlen;
		1826
		1827	if (offset < 0 || offset > svlen)
		1828	croak ("offset outside of scalar");
		1829
		1830	if (!SvOK (length) || len + offset > svlen)
		1831	len = svlen - offset;
		1832
		1833	addr = (void *)(((intptr_t)addr) + offset);
		1834	eio_page_align (&addr, &len);
		1835	#if _POSIX_MEMLOCK_RANGE
		1836	RETVAL = munlock (addr, len);
		1837	#else
		1838	RETVAL = EIO_ENOSYS ();
		1839	#endif
		1840	}
		1841	OUTPUT:
		1842	RETVAL
		1843
		1844	int
		1845	munlockall ()
		1846	CODE:
		1847	#if _POSIX_MEMLOCK
		1848	munlockall ();
		1849	#else
		1850	RETVAL = EIO_ENOSYS ();
		1851	#endif
		1852	OUTPUT:
		1853	RETVAL
		1854
		1855	int
		1856	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1857	CODE:
		1858	{
		1859	#if HAVE_LINUX_SPLICE
		1860	loff_t off_in_, off_out_;
		1861	RETVAL = splice (
		1862	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1863	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1864	length, flags
		1865	);
		1866	#else
		1867	RETVAL = EIO_ENOSYS ();
		1868	#endif
		1869	}
		1870	OUTPUT:
		1871	RETVAL
		1872
		1873	int
		1874	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1875	CODE:
		1876	#if HAVE_LINUX_SPLICE
		1877	RETVAL = tee (rfh, wfh, length, flags);
		1878	#else
		1879	RETVAL = EIO_ENOSYS ();
		1880	#endif
		1881	OUTPUT:
		1882	RETVAL
		1883
		1884	int
		1885	pipesize (aio_rfd rfh, int new_size = -1)
		1886	PROTOTYPE: $;$
		1887	CODE:
		1888	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1889	if (new_size >= 0)
		1890	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1891	else
		1892	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1893	#else
		1894	errno = ENOSYS;
		1895	RETVAL = -1;
		1896	#endif
		1897	OUTPUT:
		1898	RETVAL
		1899
		1900	void
		1901	pipe2 (int flags = 0)
		1902	PROTOTYPE: ;$
		1903	PPCODE:
		1904	{
		1905	int fd[2];
		1906	int res;
		1907
		1908	if (flags)
		1909	#if HAVE_PIPE2
		1910	res = pipe2 (fd, flags);
		1911	#else
		1912	res = (errno = ENOSYS, -1);
		1913	#endif
		1914	else
		1915	res = pipe (fd);
		1916
		1917	if (!res)
		1918	{
		1919	EXTEND (SP, 2);
		1920	PUSHs (newmortalFH (fd[0], O_RDONLY));
		1921	PUSHs (newmortalFH (fd[1], O_WRONLY));
		1922	}
		1923	}
		1924
		1925	void _on_next_submit (SV *cb)
		1926	CODE:
		1927	SvREFCNT_dec (on_next_submit);
		1928	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1929
1449	PROTOTYPES: DISABLE	1930	PROTOTYPES: DISABLE
		1931
		1932	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1933
		1934	BOOT:
		1935	{
		1936	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1937	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1938	}
		1939
		1940	void
		1941	DESTROY (SV *self)
		1942	CODE:
		1943	{
		1944	aio_wd wd = SvAIO_WD (self);
		1945	#if HAVE_AT
		1946	{
		1947	SV *callback = &PL_sv_undef;
		1948	dREQ; /* clobbers next_pri :/ */
		1949	next_pri = req->pri; /* restore next_pri */
		1950	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1951	req->type = EIO_WD_CLOSE;
		1952	req->wd = wd;
		1953	REQ_SEND;
		1954	}
		1955	#else
		1956	eio_wd_close_sync (wd);
		1957	#endif
		1958	}
1450		1959
1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1960	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452		1961
1453	void	1962	void
1454	cancel (aio_req_ornot req)	1963	cancel (aio_req_ornot req)
1455	CODE:	1964	CODE:
1456	req_cancel (req);	1965	eio_cancel (req);
1457		1966
1458	void	1967	void
1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1968	cb (aio_req_ornot req, SV *callback = NO_INIT)
1460	CODE:	1969	PPCODE:
		1970	{
		1971	if (GIMME_V != G_VOID)
		1972	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1973
		1974	if (items > 1)
		1975	{
		1976	SV *cb_cv = get_cb (callback);
		1977
1461	SvREFCNT_dec (req->callback);	1978	SvREFCNT_dec (req->callback);
1462	req->callback = newSVsv (callback);	1979	req->callback = SvREFCNT_inc (cb_cv);
		1980	}
		1981	}
1463		1982
1464	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1983	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1465		1984
1466	void	1985	void
1467	add (aio_req grp, ...)	1986	add (aio_req grp, ...)
1468	PPCODE:	1987	PPCODE:
1469	{	1988	{
1470	int i;	1989	int i;
1471	aio_req req;
1472		1990
1473	if (grp->fd == 2)	1991	if (grp->int1 == 2)
1474	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1992	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1475		1993
1476	for (i = 1; i < items; ++i )	1994	for (i = 1; i < items; ++i )
1477	{	1995	{
		1996	aio_req req;
		1997
1478	if (GIMME_V != G_VOID)	1998	if (GIMME_V != G_VOID)
1479	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1999	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1480		2000
1481	req = SvAIO_REQ (ST (i));	2001	req = SvAIO_REQ (ST (i));
1482		2002
1483	if (req)	2003	if (req)
1484	{	2004	eio_grp_add (grp, req);
1485	++grp->length;
1486	req->grp = grp;
1487
1488	req->grp_prev = 0;
1489	req->grp_next = grp->grp_first;
1490
1491	if (grp->grp_first)
1492	grp->grp_first->grp_prev = req;
1493
1494	grp->grp_first = req;
1495	}
1496	}	2005	}
1497	}	2006	}
		2007
		2008	void
		2009	cancel_subs (aio_req_ornot req)
		2010	CODE:
		2011	req_cancel_subs (req);
1498		2012
1499	void	2013	void
1500	result (aio_req grp, ...)	2014	result (aio_req grp, ...)
1501	CODE:	2015	CODE:
1502	{	2016	{
1503	int i;	2017	int i;
		2018	AV *av;
		2019
		2020	grp->errorno = errno;
		2021
1504	AV *av = newAV ();	2022	av = newAV ();
		2023	av_extend (av, items - 1);
1505		2024
1506	for (i = 1; i < items; ++i )	2025	for (i = 1; i < items; ++i )
1507	av_push (av, newSVsv (ST (i)));	2026	av_push (av, newSVsv (ST (i)));
1508		2027
1509	SvREFCNT_dec (grp->data);	2028	SvREFCNT_dec (grp->sv1);
1510	grp->data = (SV *)av;	2029	grp->sv1 = (SV *)av;
1511	}	2030	}
		2031
		2032	void
		2033	errno (aio_req grp, int errorno = errno)
		2034	CODE:
		2035	grp->errorno = errorno;
1512		2036
1513	void	2037	void
1514	limit (aio_req grp, int limit)	2038	limit (aio_req grp, int limit)
1515	CODE:	2039	CODE:
1516	grp->fd2 = limit;	2040	eio_grp_limit (grp, limit);
1517	aio_grp_feed (grp);
1518		2041
1519	void	2042	void
1520	feed (aio_req grp, SV *callback=&PL_sv_undef)	2043	feed (aio_req grp, SV *callback = &PL_sv_undef)
1521	CODE:	2044	CODE:
1522	{	2045	{
1523	SvREFCNT_dec (grp->fh2);	2046	SvREFCNT_dec (grp->sv2);
1524	grp->fh2 = newSVsv (callback);	2047	grp->sv2 = newSVsv (callback);
		2048	grp->feed = aio_grp_feed;
1525		2049
1526	if (grp->fd2 <= 0)	2050	if (grp->int2 <= 0)
1527	grp->fd2 = 2;	2051	grp->int2 = 2;
1528		2052
1529	aio_grp_feed (grp);	2053	eio_grp_limit (grp, grp->int2);
1530	}	2054	}
1531		2055

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