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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC vs.
Revision 1.244 by root, Tue May 30 22:45:52 2017 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. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
		37
		38	/* perl namespace pollution */
		39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
		84	#else
		85
39	# include <sys/socket.h>	86	#include <sys/time.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		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, *aio_wd_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	SV *sv3, *sv4; \
		119	STRLEN stroffset; \
		120	SV *self;
		121
		122	#define EIO_NO_WRAPPERS 1
		123
		124	#include "libeio/config.h"
		125	#include "libeio/eio.h"
		126
		127	static int req_invoke (eio_req *req);
		128	#define EIO_FINISH(req) req_invoke (req)
		129	static void req_destroy (eio_req *grp);
		130	#define EIO_DESTROY(req) req_destroy (req)
		131
		132	#include "libeio/eio.c"
		133
		134	#if !HAVE_POSIX_FADVISE
		135	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		136	#endif
		137
		138	#if !HAVE_POSIX_MADVISE
		139	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		140	#endif
		141
		142	#ifndef MAP_ANONYMOUS
		143	# ifdef MAP_ANON
		144	# define MAP_ANONYMOUS MAP_ANON
42	# else	145	# else
43	# error sendfile support requested but not available	146	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	147	# endif
45	#endif	148	#endif
46		149
47	/* used for struct dirent, AIX doesn't provide it */	150	/* defines all sorts of constants to 0 unless they are already defined */
48	#ifndef NAME_MAX	151	/* also provides const_iv_ and const_niv_ macros for them */
49	# define NAME_MAX 4096	152	#include "def0.h"
50	#endif
51		153
52	#if __ia64	154	#ifndef makedev
53	# define STACKSIZE 65536	155	# 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	156	#endif
		157	#ifndef major
		158	# define major(dev) ((dev) >> 8)
		159	#endif
		160	#ifndef minor
		161	# define minor(dev) ((dev) & 0xff)
		162	#endif
59		163
60	/* buffer size for various temporary buffers */	164	#if PAGESIZE <= 0
61	#define AIO_BUFSIZE 65536	165	# define PAGESIZE sysconf (_SC_PAGESIZE)
		166	#endif
62		167
63	#define dBUF \	168	/*****************************************************************************/
64	char *aio_buf; \	169
65	LOCK (wrklock); \	170	static void
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	171	fiemap (eio_req *req)
67	UNLOCK (wrklock); \	172	{
68	if (!aio_buf) \	173	req->result = -1;
		174
		175	#if HAVE_FIEMAP
		176	/* assume some c99 */
		177	struct fiemap *fiemap = 0;
		178	size_t end_offset;
		179	int count = req->int3;
		180
		181	req->flags |= EIO_FLAG_PTR1_FREE;
		182
		183	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		184	/* increase in 3.5kb steps */
		185	if (count < 0)
		186	count = 8;
		187
		188	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		189	errno = ENOMEM;
		190	if (!fiemap)
69	return -1;	191	return;
70		192
71	enum {	193	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		194
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	195	fiemap->fm_start = req->offs;
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	196	fiemap->fm_length = req->size;
		197	fiemap->fm_flags = req->int2;
		198	fiemap->fm_extent_count = count;
87		199
88	typedef struct aio_cb	200	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
89	{	201	return;
90	struct aio_cb *volatile next;
91		202
92	SV *data, *callback;	203	if (req->int3 >= 0 /* not autosizing */
93	SV *fh, *fh2;	204	|| !fiemap->fm_mapped_extents /* no more extents */
94	void *dataptr, *data2ptr;	205	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
95	Stat_t *statdata;	206	goto done;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99		207
100	STRLEN dataoffset;	208	/* else we have to loop -
101	int type;	209	* it would be tempting (actually I tried that first) to just query the
102	int fd, fd2;	210	* number of extents needed, but linux often feels like not returning all
103	int errorno;	211	* extents, without telling us it left any out. this complicates
104	mode_t mode; /* open */	212	* this quite a bit.
		213	*/
105		214
106	unsigned char flags;	215	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
107	unsigned char pri;
108		216
109	SV *self; /* the perl counterpart of this request, if any */	217	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 respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{	218	{
165	closedir (wrk->dirp);	219	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
166	wrk->dirp = 0;	220	char scratch[3072];
167	}	221	struct fiemap *incmap = (struct fiemap *)scratch;
168		222
169	if (wrk->dbuf)	223	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
170	{	224	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
171	free (wrk->dbuf);	225	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
172	wrk->dbuf = 0;	226	incmap->fm_flags = fiemap->fm_flags;
173	}	227	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
174	}
175		228
176	static void worker_free (worker *wrk)	229	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;	230	return;
223		231
224	--q->size;	232	if (!incmap->fm_mapped_extents)
		233	goto done;
225		234
226	for (pri = NUM_PRI; pri--; )	235	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
227	{	236	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
228	aio_req req = q->qs[pri];	237	errno = ENOMEM;
229
230	if (req)	238	if (!fiemap)
		239	return;
		240
		241	req->ptr1 = fiemap;
		242
		243	for (count = 0; count < incmap->fm_mapped_extents; ++count)
231	{	244	{
232	if (!(q->qs[pri] = req->next))	245	struct fiemap_extent *e = incmap->fm_extents + count;
233	q->qe[pri] = 0;
234		246
235	return req;	247	if (e->fe_logical + e->fe_length >= end_offset)
		248	goto done;
		249
		250	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		251
		252	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		253	goto done;
		254
236	}	255	}
237	}	256	}
238		257
239	abort ();	258	done:
240	}	259	req->result = 0;
241		260
242	static int poll_cb ();	261	#else
243	static void req_invoke (aio_req req);	262	errno = ENOSYS;
		263	#endif
		264	}
		265
		266	/*****************************************************************************/
		267
		268	enum {
		269	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		270	};
		271
		272	typedef eio_req *aio_req;
		273	typedef eio_req *aio_req_ornot;
		274	typedef eio_wd aio_wd;
		275
		276	static SV *on_next_submit;
		277	static int next_pri = EIO_PRI_DEFAULT;
		278	static int max_outstanding;
		279
		280	static s_epipe respipe;
		281
244	static void req_free (aio_req req);	282	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	283	static void req_cancel (aio_req req);
246		284
		285	static void
		286	want_poll (void)
		287	{
		288	/* write a dummy byte to the pipe so fh becomes ready */
		289	s_epipe_signal (&respipe);
		290	}
		291
		292	static void
		293	done_poll (void)
		294	{
		295	/* read any signals sent by the worker threads */
		296	s_epipe_drain (&respipe);
		297	}
		298
247	/* must be called at most once */	299	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	300	static SV *
		301	req_sv (aio_req req, HV *stash)
249	{	302	{
250	if (!req->self)	303	if (!req->self)
251	{	304	{
252	req->self = (SV *)newHV ();	305	req->self = (SV *)newHV ();
253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	306	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254	}	307	}
255		308
256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	309	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
257	}	310	}
258		311
259	static aio_req SvAIO_REQ (SV *sv)	312	static SV *
		313	newSVaio_wd (aio_wd wd)
		314	{
		315	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		316	}
		317
		318	static aio_req
		319	SvAIO_REQ (SV *sv)
260	{	320	{
261	MAGIC *mg;	321	MAGIC *mg;
262		322
263	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	323	if (!SvROK (sv)
		324	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		325	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		326	&& SvSTASH (SvRV (sv)) != aio_req_stash
		327	&& !sv_derived_from (sv, "IO::AIO::REQ")))
264	croak ("object of class " AIO_REQ_KLASS " expected");	328	croak ("object of class IO::AIO::REQ expected");
265		329
266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	330	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267		331
268	return mg ? (aio_req)mg->mg_ptr : 0;	332	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	333	}
270		334
		335	static aio_wd
		336	SvAIO_WD (SV *sv)
		337	{
		338	if (!SvROK (sv)
		339	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		340	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		341	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		342
		343	return (aio_wd)(long)SvIVX (SvRV (sv));
		344	}
		345
		346	static SV *
		347	newmortalFH (int fd, int flags)
		348	{
		349	if (fd < 0)
		350	return &PL_sv_undef;
		351
		352	GV *gv = (GV *)sv_newmortal ();
		353	char sym[64];
		354	int symlen;
		355
		356	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		357	gv_init (gv, aio_stash, sym, symlen, 0);
		358
		359	symlen = snprintf (
		360	sym,
		361	sizeof (sym),
		362	"%s&=%d",
		363	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		364	fd
		365	);
		366
		367	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		368	? (SV *)gv : &PL_sv_undef;
		369	}
		370
		371	static void
271	static void aio_grp_feed (aio_req grp)	372	aio_grp_feed (aio_req grp)
272	{	373	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	374	if (grp->sv2 && SvOK (grp->sv2))
274	{	375	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	376	dSP;
280		377
281	ENTER;	378	ENTER;
282	SAVETMPS;	379	SAVETMPS;
283	PUSHMARK (SP);	380	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	381	XPUSHs (req_sv (grp, aio_grp_stash));
285	PUTBACK;	382	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	383	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	384	SPAGAIN;
288	FREETMPS;	385	FREETMPS;
289	LEAVE;	386	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	387	}
300	}	388	}
301		389
302	static void aio_grp_dec (aio_req grp)	390	static void
		391	req_submit (eio_req *req)
303	{	392	{
304	--grp->length;	393	eio_submit (req);
305		394
306	/* call feeder, if applicable */	395	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	396	{
312	req_invoke (grp);	397	dSP;
313	req_free (grp);	398	SV *cb = sv_2mortal (on_next_submit);
		399
		400	on_next_submit = 0;
		401
		402	PUSHMARK (SP);
		403	PUTBACK;
		404	call_sv (cb, G_DISCARD | G_EVAL);
314	}	405	}
315	}	406	}
316		407
317	static void poll_wait ()	408	static int
		409	req_invoke (eio_req *req)
318	{	410	{
319	fd_set rfd;	411	if (req->flags & FLAG_SV2_RO_OFF)
		412	SvREADONLY_off (req->sv2);
320		413
321	while (nreqs)	414	if (!EIO_CANCELLED (req) && req->callback)
322	{	415	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;	416	dSP;
345		417	static SV *sv_result_cache; /* caches the result integer SV */
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	418	SV *sv_result;
347	{
348	errno = req->errorno;
349		419
350	ENTER;	420	ENTER;
351	SAVETMPS;	421	SAVETMPS;
352	PUSHMARK (SP);	422	PUSHMARK (SP);
353	EXTEND (SP, 1);	423	EXTEND (SP, 1);
354		424
		425	/* do not recreate the result IV from scratch each time */
		426	if (expect_true (sv_result_cache))
		427	{
		428	sv_result = sv_result_cache; sv_result_cache = 0;
		429	SvIV_set (sv_result, req->result);
		430	SvIOK_only (sv_result);
		431	}
		432	else
		433	{
		434	sv_result = newSViv (req->result);
		435	SvREADONLY_on (sv_result);
		436	}
		437
355	switch (req->type)	438	switch (req->type)
356	{	439	{
		440	case EIO_WD_OPEN:
		441	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		442	break;
		443
357	case REQ_READDIR:	444	case EIO_READDIR:
358	{	445	{
359	SV *rv = &PL_sv_undef;	446	SV *rv = &PL_sv_undef;
360		447
361	if (req->result >= 0)	448	if (req->result >= 0)
362	{	449	{
363	int i;	450	int i;
364	char *buf = req->data2ptr;	451	char *names = (char *)req->ptr2;
		452	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
365	AV *av = newAV ();	453	AV *av = newAV ();
366		454
367	av_extend (av, req->result - 1);	455	av_extend (av, req->result - 1);
368		456
369	for (i = 0; i < req->result; ++i)	457	for (i = 0; i < req->result; ++i)
370	{	458	{
371	SV *sv = newSVpv (buf, 0);	459	if (req->int1 & EIO_READDIR_DENTS)
		460	{
		461	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
372		462
		463	if (req->int1 & EIO_READDIR_CUSTOM2)
		464	{
		465	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		466	AV *avent = newAV ();
		467
		468	av_extend (avent, 2);
		469
		470	if (!sv_type [ent->type])
		471	{
		472	sv_type [ent->type] = newSViv (ent->type);
		473	SvREADONLY_on (sv_type [ent->type]);
		474	}
		475
		476	av_store (avent, 0, namesv);
		477	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		478	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		479
		480	av_store (av, i, newRV_noinc ((SV *)avent));
		481	}
		482	else
373	av_store (av, i, sv);	483	av_store (av, i, namesv);
		484
		485	++ent;
		486	}
		487	else
		488	{
		489	SV *name = newSVpv (names, 0);
		490	av_store (av, i, name);
374	buf += SvCUR (sv) + 1;	491	names += SvCUR (name) + 1;
		492	}
375	}	493	}
376		494
377	rv = sv_2mortal (newRV_noinc ((SV *)av));	495	rv = sv_2mortal (newRV_noinc ((SV *)av));
378	}	496	}
379		497
380	PUSHs (rv);	498	PUSHs (rv);
		499
		500	if (req->int1 & EIO_READDIR_CUSTOM1)
		501	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
381	}	502	}
382	break;	503	break;
383		504
384	case REQ_OPEN:	505	case EIO_OPEN:
		506	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		507	break;
		508
		509	case EIO_STATVFS:
		510	case EIO_FSTATVFS:
385	{	511	{
386	/* convert fd to fh */	512	SV *rv = &PL_sv_undef;
387	SV *fh;	513
		514	#ifndef _WIN32
		515	if (req->result >= 0)
		516	{
		517	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		518	HV *hv = newHV ();
		519	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		520	* chooses to make it a struct.
		521	*/
		522	unsigned long fsid = 0;
		523	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
388		524
389	PUSHs (sv_2mortal (newSViv (req->result)));	525	rv = sv_2mortal (newRV_noinc ((SV *)hv));
390	PUTBACK;
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
392	SPAGAIN;
393		526
394	fh = SvREFCNT_inc (POPs);	527	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		528	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		529	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		530	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		531	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		532	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		533	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		534	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		535	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		536	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		537	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		538	}
		539	#endif
395		540
396	PUSHMARK (SP);	541	PUSHs (rv);
397	XPUSHs (sv_2mortal (fh));
398	}	542	}
		543
399	break;	544	break;
400		545
401	case REQ_GROUP:	546	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	547	req->int1 = 2; /* mark group as finished */
403		548
404	if (req->data)	549	if (req->sv1)
405	{	550	{
406	int i;	551	int i;
407	AV *av = (AV *)req->data;	552	AV *av = (AV *)req->sv1;
408		553
409	EXTEND (SP, AvFILL (av) + 1);	554	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	555	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	556	PUSHs (*av_fetch (av, i, 0));
412	}	557	}
413	break;	558	break;
414		559
415	case REQ_NOP:	560	case EIO_NOP:
416	case REQ_BUSY:	561	case EIO_BUSY:
417	break;	562	break;
418		563
		564	case EIO_READLINK:
		565	case EIO_REALPATH:
		566	if (req->result > 0)
		567	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		568	break;
		569
		570	case EIO_STAT:
		571	case EIO_LSTAT:
		572	case EIO_FSTAT:
		573	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		574
		575	if (!(PL_laststatval = req->result))
		576	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		577	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		578
		579	PUSHs (sv_result);
		580	break;
		581
		582	case EIO_SEEK:
		583	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		584	break;
		585
		586	case EIO_READ:
		587	{
		588	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		589	*SvEND (req->sv2) = 0;
		590	SvPOK_only (req->sv2);
		591	SvSETMAGIC (req->sv2);
		592	PUSHs (sv_result);
		593	}
		594	break;
		595
		596	case EIO_CUSTOM:
		597	if (req->feed == fiemap)
		598	{
		599	#if HAVE_FIEMAP
		600	if (!req->result)
		601	{
		602	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		603
		604	if (fiemap->fm_extent_count)
		605	{
		606	AV *av = newAV ();
		607	int i;
		608
		609	while (fiemap->fm_mapped_extents)
		610	{
		611	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		612	AV *ext_av = newAV ();
		613
		614	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		615	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		616	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		617	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		618
		619	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		620	}
		621
		622	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		623	}
		624	else
		625	{
		626	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		627	PUSHs (sv_result);
		628	}
		629	}
		630	#endif
		631	}
		632	else
		633	PUSHs (sv_result);
		634	break;
		635
		636	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		637	if (req->result > 0)
		638	SvIV_set (sv_result, 0);
		639	/* FALLTHROUGH */
		640
419	default:	641	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	642	PUSHs (sv_result);
421	break;	643	break;
422	}	644	}
423		645
		646	errno = req->errorno;
424		647
425	PUTBACK;	648	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	649	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	650	SPAGAIN;
		651
		652	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		653	SvREFCNT_dec (sv_result);
		654	else
		655	sv_result_cache = sv_result;
428		656
429	FREETMPS;	657	FREETMPS;
430	LEAVE;	658	LEAVE;
		659
		660	PUTBACK;
431	}	661	}
432		662
433	if (req->grp)	663	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	664	}
453		665
454	static void req_free (aio_req req)	666	static void
		667	req_destroy (aio_req req)
455	{	668	{
456	if (req->self)	669	if (req->self)
457	{	670	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	671	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	672	SvREFCNT_dec (req->self);
460	}	673	}
461		674
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	675	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	676	SvREFCNT_dec (req->sv2);
		677	SvREFCNT_dec (req->sv3);
		678	SvREFCNT_dec (req->sv4);
465	SvREFCNT_dec (req->callback);	679	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467		680
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470
471	Safefree (req);	681	free (req);
472	}	682	}
473		683
		684	static void
474	static void req_cancel_subs (aio_req grp)	685	req_cancel_subs (aio_req grp)
475	{	686	{
476	aio_req sub;
477
478	if (grp->type != REQ_GROUP)	687	if (grp->type != EIO_GROUP)
479	return;	688	return;
480		689
481	SvREFCNT_dec (grp->fh2);	690	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	691	grp->sv2 = 0;
483		692
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	693	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	694	}
487		695
488	static void req_cancel (aio_req req)	696	static void ecb_cold
		697	create_respipe (void)
489	{	698	{
490	req->flags |= FLAG_CANCELLED;	699	if (s_epipe_renew (&respipe))
491		700	croak ("IO::AIO: unable to initialize result pipe");
492	req_cancel_subs (req);
493	}	701	}
494		702
495	static int poll_cb ()	703	static void
		704	poll_wait (void)
496	{	705	{
497	dSP;	706	while (eio_nreqs ())
498	int count = 0;	707	{
499	int do_croak = 0;	708	int size;
500	aio_req req;
501		709
		710	X_LOCK (EIO_POOL->reslock);
		711	size = EIO_POOL->res_queue.size;
		712	X_UNLOCK (EIO_POOL->reslock);
		713
		714	if (size)
		715	return;
		716
		717	etp_maybe_start_thread (EIO_POOL);
		718
		719	s_epipe_wait (&respipe);
		720	}
		721	}
		722
		723	static int
		724	poll_cb (void)
		725	{
502	for (;;)	726	for (;;)
503	{	727	{
504	LOCK (reslock);	728	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		729
507	if (req)	730	if (res > 0)
		731	croak (0);
		732
		733	if (!max_outstanding || max_outstanding > eio_nreqs ())
		734	return res;
		735
		736	poll_wait ();
		737	}
		738	}
		739
		740	static void ecb_cold
		741	reinit (void)
		742	{
		743	create_respipe ();
		744
		745	if (eio_init (want_poll, done_poll) < 0)
		746	croak ("IO::AIO: unable to initialise eio library");
		747	}
		748
		749	/*****************************************************************************/
		750
		751	#if !_POSIX_MAPPED_FILES
		752	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		753	# define munmap(addr,length) EIO_ENOSYS ()
		754	#endif
		755
		756	#if !_POSIX_MEMORY_PROTECTION
		757	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		758	#endif
		759
		760	#define MMAP_MAGIC PERL_MAGIC_ext
		761
		762	static int ecb_cold
		763	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		764	{
		765	int old_errno = errno;
		766	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		767	errno = old_errno;
		768
		769	mg->mg_obj = 0; /* just in case */
		770
		771	SvREADONLY_off (sv);
		772
		773	if (SvPVX (sv) != mg->mg_ptr)
		774	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		775
		776	SvCUR_set (sv, 0);
		777	SvPVX (sv) = 0;
		778	SvOK_off (sv);
		779
		780	return 0;
		781	}
		782
		783	static MGVTBL mmap_vtbl = {
		784	0, 0, 0, 0, mmap_free
		785	};
		786
		787	/*****************************************************************************/
		788
		789	static SV *
		790	get_cb (SV *cb_sv)
		791	{
		792	SvGETMAGIC (cb_sv);
		793	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		794	}
		795
		796	static aio_req ecb_noinline
		797	dreq (SV *callback)
		798	{
		799	SV *cb_cv;
		800	aio_req req;
		801	int req_pri = next_pri;
		802	next_pri = EIO_PRI_DEFAULT;
		803
		804	cb_cv = get_cb (callback);
		805
		806	req = calloc (sizeof (*req), 1);
		807	if (!req)
		808	croak ("out of memory during eio_req allocation");
		809
		810	req->callback = SvREFCNT_inc (cb_cv);
		811	req->pri = req_pri;
		812
		813	return req;
		814	}
		815
		816	#define dREQ \
		817	aio_req req = dreq (callback); \
		818
		819	#define REQ_SEND \
		820	PUTBACK; \
		821	req_submit (req); \
		822	SPAGAIN; \
		823	\
		824	if (GIMME_V != G_VOID) \
		825	XPUSHs (req_sv (req, aio_req_stash));
		826
		827	ecb_inline void
		828	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		829	{
		830	if (expect_false (SvROK (path)))
		831	{
		832	SV *rv = SvRV (path);
		833	SV *wdob;
		834
		835	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
508	{	836	{
509	if (!res_queue.size)	837	path = AvARRAY (rv)[1];
		838	wdob = AvARRAY (rv)[0];
		839
		840	if (SvOK (wdob))
510	{	841	{
511	/* read any signals sent by the worker threads */	842	*wd = SvAIO_WD (wdob);
512	char buf [32];	843	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}	844	}
		845	else
		846	*wd = EIO_INVALID_WD;
516	}	847	}
517		848	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
518	UNLOCK (reslock);
519
520	if (!req)
521	break;
522
523	--nreqs;
524
525	if (req->type == REQ_QUIT)
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{	849	{
529	req->fd = 1; /* mark request as delayed */	850	*wd = (aio_wd)(long)SvIVX (rv);
530	continue;	851	*wdsv = SvREFCNT_inc_NN (rv);
		852	*ptr = ".";
		853	return; /* path set to "." */
531	}	854	}
532	else	855	else
533	{	856	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	857	}
554		858
555	return count;	859	*pathsv = newSVsv (path);
		860	*ptr = SvPVbyte_nolen (*pathsv);
556	}	861	}
557		862
558	static void *aio_proc(void *arg);	863	static void ecb_noinline
559		864	req_set_path1 (aio_req req, SV *path)
560	static void start_thread (void)
561	{	865	{
562	sigset_t fullsigset, oldsigset;	866	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
563	pthread_attr_t attr;	867	}
564		868
565	worker *wrk = calloc (1, sizeof (worker));	869	static void ecb_noinline
		870	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		871	{
		872	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
566		873
567	if (!wrk)	874	switch (SvTYPE (rv))
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{	875	{
581	wrk->prev = &wrk_first;	876	case SVt_PVIO:
582	wrk->next = wrk_first.next;	877	case SVt_PVLV:
583	wrk_first.next->prev = wrk;	878	case SVt_PVGV:
584	wrk_first.next = wrk;	879	req->type = type_fh;
585	started++;	880	req->sv1 = newSVsv (fh_or_path);
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	break;
		883
		884	default:
		885	req->type = type_path;
		886	req_set_path1 (req, fh_or_path);
		887	break;
586	}	888	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}	889	}
593		890
594	static void req_send (aio_req req)	891	XS(boot_IO__AIO) ecb_cold;
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598		892
599	++nreqs;	893	MODULE = IO::AIO PACKAGE = IO::AIO
600		894
601	LOCK (reqlock);	895	PROTOTYPES: ENABLE
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606		896
607	static void end_thread (void)	897	BOOT:
608	{	898	{
609	aio_req req;	899	static const struct {
		900	const char *name;
		901	IV iv;
		902	} *civ, const_iv[] = {
		903	# define const_niv(name, value) { # name, (IV) value },
		904	# define const_iv(name) { # name, (IV) name },
		905	# define const_eio(name) { # name, (IV) EIO_ ## name },
610		906
611	Newz (0, req, 1, aio_cb);	907	/* you have to re-run ./gendef0 after adding/removing any constants here */
		908	/* the first block can be undef if missing */
		909	const_iv (ENOSYS)
		910	const_iv (EXDEV)
		911	const_iv (EBADR)
612		912
613	req->type = REQ_QUIT;	913	/* for lseek */
614	req->pri = PRI_MAX + PRI_BIAS;	914	const_iv (SEEK_DATA)
		915	const_iv (SEEK_HOLE)
615		916
616	req_send (req);	917	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
617	}	918	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		919	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		920	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		921	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		922	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
618		923
619	static void min_parallel (int nthreads)	924	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
620	{	925	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
621	if (wanted < nthreads)	926	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
622	wanted = nthreads;	927	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
623	}	928	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		929	const_niv (MADV_FREE , POSIX_MADV_FREE)
624		930
625	static void max_parallel (int nthreads)	931	/* the second block will be 0 when missing */
626	{	932	const_iv (O_RDONLY)
627	int cur = started;	933	const_iv (O_WRONLY)
		934	const_iv (O_RDWR)
		935	const_iv (O_CREAT)
		936	const_iv (O_TRUNC)
		937	const_iv (O_EXCL)
		938	const_iv (O_APPEND)
628		939
629	if (wanted > nthreads)	940	const_iv (O_ASYNC)
630	wanted = nthreads;	941	const_iv (O_DIRECT)
		942	const_iv (O_NOATIME)
631		943
632	while (cur > wanted)	944	const_iv (O_CLOEXEC)
633	{	945	const_iv (O_NOCTTY)
634	end_thread ();	946	const_iv (O_NOFOLLOW)
635	cur--;	947	const_iv (O_NONBLOCK)
636	}	948	const_iv (O_EXEC)
		949	const_iv (O_SEARCH)
		950	const_iv (O_DIRECTORY)
		951	const_iv (O_DSYNC)
		952	const_iv (O_RSYNC)
		953	const_iv (O_SYNC)
		954	const_iv (O_PATH)
		955	const_iv (O_TMPFILE)
		956	const_iv (O_TTY_INIT)
637		957
638	while (started > wanted)	958	const_iv (S_IFIFO)
639	{	959	const_iv (S_IFCHR)
640	poll_wait ();	960	const_iv (S_IFBLK)
641	poll_cb ();	961	const_iv (S_IFLNK)
642	}	962	const_iv (S_IFREG)
643	}	963	const_iv (S_IFDIR)
		964	const_iv (S_IFWHT)
		965	const_iv (S_IFSOCK)
		966	const_iv (S_IFMT)
644		967
645	static void create_pipe ()	968	const_iv (ST_RDONLY)
646	{	969	const_iv (ST_NOSUID)
647	if (pipe (respipe))	970	const_iv (ST_NODEV)
648	croak ("unable to initialize result pipe");	971	const_iv (ST_NOEXEC)
		972	const_iv (ST_SYNCHRONOUS)
		973	const_iv (ST_MANDLOCK)
		974	const_iv (ST_WRITE)
		975	const_iv (ST_APPEND)
		976	const_iv (ST_IMMUTABLE)
		977	const_iv (ST_NOATIME)
		978	const_iv (ST_NODIRATIME)
		979	const_iv (ST_RELATIME)
649		980
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	981	const_iv (PROT_NONE)
651	croak ("cannot set result pipe to nonblocking mode");	982	const_iv (PROT_EXEC)
		983	const_iv (PROT_READ)
		984	const_iv (PROT_WRITE)
652		985
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	986	const_iv (MAP_PRIVATE)
654	croak ("cannot set result pipe to nonblocking mode");	987	const_iv (MAP_SHARED)
655	}	988	const_iv (MAP_FIXED)
		989	const_iv (MAP_ANONYMOUS)
656		990
657	/*****************************************************************************/	991	/* linuxish */
658	/* work around various missing functions */	992	const_iv (MAP_LOCKED)
		993	const_iv (MAP_NORESERVE)
		994	const_iv (MAP_POPULATE)
		995	const_iv (MAP_NONBLOCK)
		996	const_iv (MAP_GROWSDOWN)
		997	const_iv (MAP_32BIT)
		998	const_iv (MAP_HUGETLB)
		999	const_iv (MAP_STACK)
659		1000
660	#if !HAVE_PREADWRITE	1001	const_iv (FIFREEZE)
661	# define pread aio_pread	1002	const_iv (FITHAW)
662	# define pwrite aio_pwrite	1003	const_iv (FITRIM)
		1004	const_iv (FICLONE)
		1005	const_iv (FICLONERANGE)
		1006	const_iv (FIDEDUPERANGE)
663		1007
664	/*	1008	const_iv (FS_IOC_GETFLAGS)
665	* make our pread/pwrite safe against themselves, but not against	1009	const_iv (FS_IOC_SETFLAGS)
666	* normal read/write by using a mutex. slows down execution a lot,	1010	const_iv (FS_IOC_GETVERSION)
667	* but that's your problem, not mine.	1011	const_iv (FS_IOC_SETVERSION)
668	*/	1012	const_iv (FS_IOC_FIEMAP)
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	1013	const_iv (FS_IOC_FSGETXATTR)
		1014	const_iv (FS_IOC_FSSETXATTR)
		1015	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1016	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1017	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
670		1018
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1019	const_iv (FS_KEY_DESCRIPTOR_SIZE)
672	{
673	ssize_t res;
674	off_t ooffset;
675		1020
676	LOCK (preadwritelock);	1021	const_iv (FS_SECRM_FL)
677	ooffset = lseek (fd, 0, SEEK_CUR);	1022	const_iv (FS_UNRM_FL)
678	lseek (fd, offset, SEEK_SET);	1023	const_iv (FS_COMPR_FL)
679	res = read (fd, buf, count);	1024	const_iv (FS_SYNC_FL)
680	lseek (fd, ooffset, SEEK_SET);	1025	const_iv (FS_IMMUTABLE_FL)
681	UNLOCK (preadwritelock);	1026	const_iv (FS_APPEND_FL)
		1027	const_iv (FS_NODUMP_FL)
		1028	const_iv (FS_NOATIME_FL)
		1029	const_iv (FS_DIRTY_FL)
		1030	const_iv (FS_COMPRBLK_FL)
		1031	const_iv (FS_NOCOMP_FL)
		1032	const_iv (FS_ENCRYPT_FL)
		1033	const_iv (FS_BTREE_FL)
		1034	const_iv (FS_INDEX_FL)
		1035	const_iv (FS_JOURNAL_DATA_FL)
		1036	const_iv (FS_NOTAIL_FL)
		1037	const_iv (FS_DIRSYNC_FL)
		1038	const_iv (FS_TOPDIR_FL)
		1039	const_iv (FS_FL_USER_MODIFIABLE)
682		1040
683	return res;	1041	const_iv (FS_XFLAG_REALTIME)
684	}	1042	const_iv (FS_XFLAG_PREALLOC)
		1043	const_iv (FS_XFLAG_IMMUTABLE)
		1044	const_iv (FS_XFLAG_APPEND)
		1045	const_iv (FS_XFLAG_SYNC)
		1046	const_iv (FS_XFLAG_NOATIME)
		1047	const_iv (FS_XFLAG_NODUMP)
		1048	const_iv (FS_XFLAG_RTINHERIT)
		1049	const_iv (FS_XFLAG_PROJINHERIT)
		1050	const_iv (FS_XFLAG_NOSYMLINKS)
		1051	const_iv (FS_XFLAG_EXTSIZE)
		1052	const_iv (FS_XFLAG_EXTSZINHERIT)
		1053	const_iv (FS_XFLAG_NODEFRAG)
		1054	const_iv (FS_XFLAG_FILESTREAM)
		1055	const_iv (FS_XFLAG_DAX)
		1056	const_iv (FS_XFLAG_HASATTR)
685		1057
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1058	const_iv (FIEMAP_FLAG_SYNC)
687	{	1059	const_iv (FIEMAP_FLAG_XATTR)
688	ssize_t res;	1060	const_iv (FIEMAP_FLAGS_COMPAT)
689	off_t ooffset;	1061	const_iv (FIEMAP_EXTENT_LAST)
		1062	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1063	const_iv (FIEMAP_EXTENT_DELALLOC)
		1064	const_iv (FIEMAP_EXTENT_ENCODED)
		1065	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1066	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1067	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1068	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1069	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1070	const_iv (FIEMAP_EXTENT_MERGED)
		1071	const_iv (FIEMAP_EXTENT_SHARED)
690		1072
691	LOCK (preadwritelock);	1073	const_iv (SPLICE_F_MOVE)
692	ooffset = lseek (fd, 0, SEEK_CUR);	1074	const_iv (SPLICE_F_NONBLOCK)
693	lseek (fd, offset, SEEK_SET);	1075	const_iv (SPLICE_F_MORE)
694	res = write (fd, buf, count);	1076	const_iv (SPLICE_F_GIFT)
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697		1077
698	return res;	1078	/* these are libeio constants, and are independent of gendef0 */
699	}	1079	const_eio (SEEK_SET)
700	#endif	1080	const_eio (SEEK_CUR)
		1081	const_eio (SEEK_END)
701		1082
702	#if !HAVE_FDATASYNC	1083	const_eio (MCL_FUTURE)
703	# define fdatasync fsync	1084	const_eio (MCL_CURRENT)
704	#endif
705		1085
706	#if !HAVE_READAHEAD	1086	const_eio (MS_ASYNC)
707	# define readahead aio_readahead	1087	const_eio (MS_INVALIDATE)
		1088	const_eio (MS_SYNC)
708		1089
709	static ssize_t readahead (int fd, off_t offset, size_t count)	1090	const_eio (MT_MODIFY)
710	{
711	dBUF;
712		1091
713	while (count > 0)	1092	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
714	{	1093	const_eio (SYNC_FILE_RANGE_WRITE)
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	1094	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
716		1095
717	pread (fd, aio_buf, len, offset);	1096	const_eio (FALLOC_FL_KEEP_SIZE)
718	offset += len;	1097	const_eio (FALLOC_FL_PUNCH_HOLE)
719	count -= len;	1098	const_eio (FALLOC_FL_COLLAPSE_RANGE)
720	}	1099	const_eio (FALLOC_FL_ZERO_RANGE)
721		1100
722	errno = 0;	1101	const_eio (READDIR_DENTS)
723	}	1102	const_eio (READDIR_DIRS_FIRST)
724	#endif	1103	const_eio (READDIR_STAT_ORDER)
		1104	const_eio (READDIR_FOUND_UNKNOWN)
725		1105
726	#if !HAVE_READDIR_R	1106	const_eio (DT_UNKNOWN)
727	# define readdir_r aio_readdir_r	1107	const_eio (DT_FIFO)
728		1108	const_eio (DT_CHR)
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1109	const_eio (DT_DIR)
730		1110	const_eio (DT_BLK)
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	1111	const_eio (DT_REG)
732	{	1112	const_eio (DT_LNK)
733	struct dirent *e;	1113	const_eio (DT_SOCK)
734	int errorno;	1114	const_eio (DT_WHT)
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}	1115	};
781		1116
782	# elif __hpux	1117	aio_stash = gv_stashpv ("IO::AIO" , 1);
783	res = sendfile (ofd, ifd, offset, count, 0, 0);	1118	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1119	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1120	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
784		1121
785	# elif __solaris	1122	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
786	{	1123	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
787	struct sendfilevec vec;
788	size_t sbytes;
789		1124
790	vec.sfv_fd = ifd;	1125	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794		1126
795	res = sendfilev (ofd, &vec, 1, &sbytes);	1127	reinit ();
		1128	}
796		1129
797	if (res < 0 && sbytes)	1130	void
		1131	reinit ()
		1132	PROTOTYPE:
		1133
		1134	void
		1135	max_poll_reqs (unsigned int nreqs)
		1136	PROTOTYPE: $
		1137	CODE:
		1138	eio_set_max_poll_reqs (nreqs);
		1139
		1140	void
		1141	max_poll_time (double nseconds)
		1142	PROTOTYPE: $
		1143	CODE:
		1144	eio_set_max_poll_time (nseconds);
		1145
		1146	void
		1147	min_parallel (unsigned int nthreads)
		1148	PROTOTYPE: $
		1149	CODE:
		1150	eio_set_min_parallel (nthreads);
		1151
		1152	void
		1153	max_parallel (unsigned int nthreads)
		1154	PROTOTYPE: $
		1155	CODE:
		1156	eio_set_max_parallel (nthreads);
		1157
		1158	void
		1159	max_idle (unsigned int nthreads)
		1160	PROTOTYPE: $
		1161	CODE:
		1162	eio_set_max_idle (nthreads);
		1163
		1164	void
		1165	idle_timeout (unsigned int seconds)
		1166	PROTOTYPE: $
		1167	CODE:
		1168	eio_set_idle_timeout (seconds);
		1169
		1170	void
		1171	max_outstanding (unsigned int maxreqs)
		1172	PROTOTYPE: $
		1173	CODE:
		1174	max_outstanding = maxreqs;
		1175
		1176	void
		1177	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1178	PPCODE:
		1179	{
		1180	dREQ;
		1181
		1182	req->type = EIO_WD_OPEN;
		1183	req_set_path1 (req, pathname);
		1184
		1185	REQ_SEND;
		1186	}
		1187
		1188	void
		1189	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1190	PPCODE:
		1191	{
		1192	dREQ;
		1193
		1194	req->type = EIO_OPEN;
		1195	req_set_path1 (req, pathname);
		1196	req->int1 = flags;
		1197	req->int2 = mode;
		1198
		1199	REQ_SEND;
		1200	}
		1201
		1202	void
		1203	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1204	ALIAS:
		1205	aio_fsync = EIO_FSYNC
		1206	aio_fdatasync = EIO_FDATASYNC
		1207	aio_syncfs = EIO_SYNCFS
		1208	PPCODE:
		1209	{
		1210	int fd = s_fileno_croak (fh, 0);
		1211	dREQ;
		1212
		1213	req->type = ix;
		1214	req->sv1 = newSVsv (fh);
		1215	req->int1 = fd;
		1216
		1217	REQ_SEND;
		1218	}
		1219
		1220	void
		1221	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	int fd = s_fileno_croak (fh, 0);
		1225	dREQ;
		1226
		1227	req->type = EIO_SYNC_FILE_RANGE;
		1228	req->sv1 = newSVsv (fh);
		1229	req->int1 = fd;
		1230	req->offs = offset;
798	res = sbytes;	1231	req->size = nbytes;
799	}	1232	req->int2 = flags;
800		1233
801	# endif	1234	REQ_SEND;
		1235	}
		1236
		1237	void
		1238	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1239	PPCODE:
		1240	{
		1241	int fd = s_fileno_croak (fh, 0);
		1242	dREQ;
		1243
		1244	req->type = EIO_FALLOCATE;
		1245	req->sv1 = newSVsv (fh);
		1246	req->int1 = fd;
		1247	req->int2 = mode;
		1248	req->offs = offset;
		1249	req->size = len;
		1250
		1251	REQ_SEND;
		1252	}
		1253
		1254	void
		1255	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1256	PPCODE:
		1257	{
		1258	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1259	int fd = s_fileno_croak (fh, 0);
		1260	dREQ;
		1261
		1262	if (expect_false (close_fd < 0))
		1263	{
		1264	int pipefd [2];
		1265
		1266	if (
		1267	#ifdef _WIN32
		1268	_pipe (pipefd, 1, _O_BINARY) < 0
802	#else	1269	#else
803	res = -1;	1270	pipe (pipefd) < 0
804	errno = ENOSYS;	1271	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
805	#endif	1272	#endif
806		1273	|| close (pipefd [1]) < 0
807	if (res < 0
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817
818	res = 0;
819
820	while (count)
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826	if (cnt <= 0)
827	{	1274	)
828	if (cnt && !res) res = -1;	1275	abort (); /*D*/
829	break;
830	}
831		1276
832	cnt = write (ofd, aio_buf, cnt);	1277	close_fd = pipefd [0];
833
834	if (cnt <= 0)
835	{
836	if (cnt && !res) res = -1;
837	break;
838	}
839
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;
847	}
848
849	/* read a full directory */
850	static void scandir_ (aio_req req, worker *self)
851	{
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}	1278	}
903	}
904		1279
905	if (errno)	1280	req->type = EIO_DUP2;
906	res = -1;	1281	req->int1 = close_fd;
907		1282	req->sv2 = newSVsv (fh);
908	req->result = res;	1283	req->int2 = fd;
909	}
910		1284
911	/*****************************************************************************/	1285	REQ_SEND;
912
913	static void *aio_proc (void *thr_arg)
914	{
915	aio_req req;
916	int type;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}	1286	}
1004		1287
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)
1034	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();
1060
1061	atfork_parent ();
1062	}
1063
1064	#define dREQ \
1065	aio_req req; \
1066	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
1068	\
1069	if (SvOK (callback) && !SvROK (callback)) \
1070	croak ("callback must be undef or of reference type"); \
1071	\
1072	Newz (0, req, 1, aio_cb); \
1073	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \
1075	\
1076	req->callback = newSVsv (callback); \
1077	req->pri = req_pri
1078
1079	#define REQ_SEND \
1080	req_send (req); \
1081	\
1082	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084
1085	MODULE = IO::AIO PACKAGE = IO::AIO
1086
1087	PROTOTYPES: ENABLE
1088
1089	BOOT:
1090	{
1091	HV *stash = gv_stashpv ("IO::AIO", 1);
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1095
1096	create_pipe ();
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1098	}
1099
1100	void	1288	void
1101	min_parallel (nthreads)	1289	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1102	int nthreads	1290	PPCODE:
1103	PROTOTYPE: $
1104
1105	void
1106	max_parallel (nthreads)
1107	int nthreads
1108	PROTOTYPE: $
1109
1110	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$
1117	PPCODE:
1118	{	1291	{
		1292	int fd = s_fileno_croak (fh, 0);
1119	dREQ;	1293	dREQ;
1120		1294
1121	req->type = REQ_OPEN;	1295	req->type = EIO_SEEK;
1122	req->data = newSVsv (pathname);	1296	req->sv1 = newSVsv (fh);
1123	req->dataptr = SvPVbyte_nolen (req->data);	1297	req->int1 = fd;
1124	req->fd = flags;	1298	req->offs = SvVAL64 (offset);
1125	req->mode = mode;	1299	req->int2 = whence;
1126		1300
1127	REQ_SEND;	1301	REQ_SEND;
1128	}	1302	}
1129		1303
1130	void	1304	void
1131	aio_close (fh,callback=&PL_sv_undef)	1305	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$
1135	ALIAS:	1306	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC
1139	PPCODE:
1140	{
1141	dREQ;
1142
1143	req->type = ix;
1144	req->fh = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146
1147	REQ_SEND (req);
1148	}
1149
1150	void
1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:
1159	aio_read = REQ_READ	1307	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	1308	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$
1162	PPCODE:	1309	PPCODE:
1163	{	1310	{
1164	aio_req req;
1165	STRLEN svlen;	1311	STRLEN svlen;
		1312	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1166	char *svptr = SvPVbyte (data, svlen);	1313	char *svptr = SvPVbyte (data, svlen);
1167		1314	UV len = SvUV (length);
1168	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);
1170		1315
1171	if (dataoffset < 0)	1316	if (dataoffset < 0)
1172	dataoffset += svlen;	1317	dataoffset += svlen;
1173		1318
1174	if (dataoffset < 0 || dataoffset > svlen)	1319	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	1320	croak ("dataoffset outside of data scalar");
1176		1321
1177	if (ix == REQ_WRITE)	1322	if (ix == EIO_WRITE)
1178	{	1323	{
1179	/* write: check length and adjust. */	1324	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	1325	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	1326	len = svlen - dataoffset;
1182	}	1327	}
1183	else	1328	else
1184	{	1329	{
1185	/* read: grow scalar as necessary */	1330	/* read: check type and grow scalar as necessary */
		1331	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1186	svptr = SvGROW (data, length + dataoffset);	1332	svptr = sv_grow (data, len + dataoffset + 1);
		1333	else if (SvCUR (data) < len + dataoffset)
		1334	croak ("length + dataoffset outside of scalar, and cannot grow");
1187	}	1335	}
1188
1189	if (length < 0)
1190	croak ("length must not be negative");
1191		1336
1192	{	1337	{
1193	dREQ;	1338	dREQ;
1194		1339
1195	req->type = ix;	1340	req->type = ix;
1196	req->fh = newSVsv (fh);	1341	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1342	req->int1 = fd;
1198	: IoOFP (sv_2io (fh)));	1343	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	1344	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	1345	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	1346	req->ptr2 = (char *)svptr + dataoffset;
		1347	req->stroffset = dataoffset;
1203		1348
1204	if (!SvREADONLY (data))	1349	if (!SvREADONLY (data))
1205	{	1350	{
1206	SvREADONLY_on (data);	1351	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	1352	req->flags |= FLAG_SV2_RO_OFF;
1208	}	1353	}
1209		1354
1210	REQ_SEND;	1355	REQ_SEND;
1211	}	1356	}
1212	}	1357	}
1213		1358
1214	void	1359	void
1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1360	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1216	SV * out_fh	1361	ALIAS:
1217	SV * in_fh	1362	aio_ioctl = EIO_IOCTL
1218	UV in_offset	1363	aio_fcntl = EIO_FCNTL
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$
1222	PPCODE:	1364	PPCODE:
1223	{	1365	{
1224	dREQ;	1366	int fd = s_fileno_croak (fh, 0);
		1367	char *svptr;
1225		1368
1226	req->type = REQ_SENDFILE;	1369	if (SvPOK (arg) || !SvNIOK (arg))
1227	req->fh = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1229	req->fh2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1231	req->offset = in_offset;
1232	req->length = length;
1233
1234	REQ_SEND;
1235	}
1236
1237	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$
1244	PPCODE:
1245	{
1246	dREQ;
1247
1248	req->type = REQ_READAHEAD;
1249	req->fh = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1251	req->offset = offset;
1252	req->length = length;
1253
1254	REQ_SEND;
1255	}
1256
1257	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:
1262	aio_stat = REQ_STAT
1263	aio_lstat = REQ_LSTAT
1264	PPCODE:
1265	{
1266	dREQ;
1267
1268	New (0, req->statdata, 1, Stat_t);
1269	if (!req->statdata)
1270	{	1370	{
1271	req_free (req);	1371	STRLEN svlen;
1272	croak ("out of memory during aio_req->statdata allocation");	1372	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
1273	}	1373	#ifdef IOCPARM_LEN
		1374	STRLEN need = IOCPARM_LEN (request);
		1375	#else
		1376	STRLEN need = 256;
		1377	#endif
1274		1378
1275	if (SvPOK (fh_or_path))	1379	if (svlen < need)
1276	{	1380	svptr = SvGROW (arg, need);
1277	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);
1280	}	1381	}
1281	else	1382	else
		1383	svptr = (char *)SvIV (arg);
		1384
1282	{	1385	{
		1386	dREQ;
		1387
1283	req->type = REQ_FSTAT;	1388	req->type = ix;
1284	req->fh = newSVsv (fh_or_path);	1389	req->sv1 = newSVsv (fh);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1390	req->int1 = fd;
		1391	req->int2 = (long)request;
		1392	req->sv2 = SvREFCNT_inc (arg);
		1393	req->ptr2 = svptr;
		1394
		1395	REQ_SEND;
1286	}	1396	}
		1397	}
		1398
		1399	void
		1400	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1401	ALIAS:
		1402	aio_readlink = EIO_READLINK
		1403	aio_realpath = EIO_REALPATH
		1404	PPCODE:
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req_set_path1 (req, pathname);
1287		1410
1288	REQ_SEND;	1411	REQ_SEND;
1289	}	1412	}
1290		1413
1291	void	1414	void
1292	aio_unlink (pathname,callback=&PL_sv_undef)	1415	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
1293	SV * pathname	1416	PPCODE:
1294	SV * callback	1417	{
		1418	int ifd = s_fileno_croak (in_fh , 0);
		1419	int ofd = s_fileno_croak (out_fh, 1);
		1420	dREQ;
		1421
		1422	req->type = EIO_SENDFILE;
		1423	req->sv1 = newSVsv (out_fh);
		1424	req->int1 = ofd;
		1425	req->sv2 = newSVsv (in_fh);
		1426	req->int2 = ifd;
		1427	req->offs = in_offset;
		1428	req->size = length;
		1429
		1430	REQ_SEND;
		1431	}
		1432
		1433	void
		1434	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1435	PPCODE:
		1436	{
		1437	int fd = s_fileno_croak (fh, 0);
		1438	dREQ;
		1439
		1440	req->type = EIO_READAHEAD;
		1441	req->sv1 = newSVsv (fh);
		1442	req->int1 = fd;
		1443	req->offs = offset;
		1444	req->size = length;
		1445
		1446	REQ_SEND;
		1447	}
		1448
		1449	void
		1450	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1295	ALIAS:	1451	ALIAS:
		1452	aio_stat = EIO_STAT
		1453	aio_lstat = EIO_LSTAT
		1454	aio_statvfs = EIO_STATVFS
		1455	PPCODE:
		1456	{
		1457	dREQ;
		1458
		1459	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1460
		1461	REQ_SEND;
		1462	}
		1463
		1464	UV
		1465	major (UV dev)
		1466	ALIAS:
		1467	minor = 1
		1468	CODE:
		1469	RETVAL = ix ? minor (dev) : major (dev);
		1470	OUTPUT:
		1471	RETVAL
		1472
		1473	UV
		1474	makedev (UV maj, UV min)
		1475	CODE:
		1476	RETVAL = makedev (maj, min);
		1477	OUTPUT:
		1478	RETVAL
		1479
		1480	void
		1481	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1482	PPCODE:
		1483	{
		1484	dREQ;
		1485
		1486	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1487	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1488	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1489
		1490	REQ_SEND;
		1491	}
		1492
		1493	void
		1494	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1495	PPCODE:
		1496	{
		1497	dREQ;
		1498
		1499	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1500	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1501
		1502	REQ_SEND;
		1503	}
		1504
		1505	void
		1506	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1507	PPCODE:
		1508	{
		1509	dREQ;
		1510
		1511	req->int2 = mode;
		1512	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1513
		1514	REQ_SEND;
		1515	}
		1516
		1517	void
		1518	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1519	PPCODE:
		1520	{
		1521	dREQ;
		1522
		1523	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1524	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1525	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1526
		1527	REQ_SEND;
		1528	}
		1529
		1530	void
		1531	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1532	PPCODE:
		1533	{
		1534	dREQ;
		1535
		1536	req->type = EIO_READDIR;
		1537	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1538
		1539	if (flags & EIO_READDIR_DENTS)
		1540	req->int1 |= EIO_READDIR_CUSTOM2;
		1541
		1542	req_set_path1 (req, pathname);
		1543
		1544	REQ_SEND;
		1545	}
		1546
		1547	void
		1548	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1549	PPCODE:
		1550	{
		1551	dREQ;
		1552
		1553	req->type = EIO_MKDIR;
		1554	req->int2 = mode;
		1555	req_set_path1 (req, pathname);
		1556
		1557	REQ_SEND;
		1558	}
		1559
		1560	void
		1561	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1562	ALIAS:
1296	aio_unlink = REQ_UNLINK	1563	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	1564	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	1565	aio_readdir = EIO_READDIR
1299	PPCODE:	1566	PPCODE:
1300	{	1567	{
1301	dREQ;	1568	dREQ;
1302		1569
1303	req->type = ix;	1570	req->type = ix;
1304	req->data = newSVsv (pathname);	1571	req_set_path1 (req, pathname);
1305	req->dataptr = SvPVbyte_nolen (req->data);	1572
1306
1307	REQ_SEND;	1573	REQ_SEND;
1308	}	1574	}
1309		1575
1310	void	1576	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1577	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:	1578	ALIAS:
1316	aio_link = REQ_LINK	1579	aio_link = EIO_LINK
1317	aio_symlink = REQ_SYMLINK	1580	aio_symlink = EIO_SYMLINK
1318	aio_rename = REQ_RENAME	1581	aio_rename = EIO_RENAME
1319	PPCODE:	1582	PPCODE:
1320	{	1583	{
		1584	eio_wd wd2 = 0;
1321	dREQ;	1585	dREQ;
1322		1586
1323	req->type = ix;	1587	req->type = ix;
1324	req->fh = newSVsv (oldpath);	1588	req_set_path1 (req, oldpath);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	1589	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1326	req->data = newSVsv (newpath);	1590	req->int3 = (long)wd2;
1327	req->dataptr = SvPVbyte_nolen (req->data);
1328		1591
1329	REQ_SEND;	1592	REQ_SEND;
1330	}	1593	}
1331		1594
1332	void	1595	void
1333	aio_busy (delay,callback=&PL_sv_undef)	1596	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	1597	PPCODE:
1337	{	1598	{
1338	dREQ;	1599	dREQ;
1339		1600
1340	req->type = REQ_BUSY;	1601	req->type = EIO_MKNOD;
1341	req->fd = delay < 0. ? 0 : delay;	1602	req->int2 = (mode_t)mode;
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1603	req->offs = dev;
1343		1604	req_set_path1 (req, pathname);
		1605
1344	REQ_SEND;	1606	REQ_SEND;
1345	}	1607	}
1346		1608
1347	void	1609	void
1348	aio_group (callback=&PL_sv_undef)	1610	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
1349	SV * callback	1611	ALIAS:
1350	PROTOTYPE: ;$	1612	aio_mtouch = EIO_MTOUCH
		1613	aio_msync = EIO_MSYNC
1351	PPCODE:	1614	PPCODE:
1352	{	1615	{
		1616	STRLEN svlen;
		1617	char *svptr = SvPVbyte (data, svlen);
		1618	UV len = SvUV (length);
		1619
		1620	if (flags < 0)
		1621	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1622
		1623	if (offset < 0)
		1624	offset += svlen;
		1625
		1626	if (offset < 0 || offset > svlen)
		1627	croak ("offset outside of scalar");
		1628
		1629	if (!SvOK (length) || len + offset > svlen)
		1630	len = svlen - offset;
		1631
		1632	{
		1633	dREQ;
		1634
		1635	req->type = ix;
		1636	req->sv2 = SvREFCNT_inc (data);
		1637	req->ptr2 = (char *)svptr + offset;
		1638	req->size = len;
		1639	req->int1 = flags;
		1640
		1641	REQ_SEND;
		1642	}
		1643	}
		1644
		1645	void
		1646	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1647	PPCODE:
		1648	{
		1649	STRLEN svlen;
		1650	char *svptr = SvPVbyte (data, svlen);
		1651	UV len = SvUV (length);
		1652
		1653	if (offset < 0)
		1654	offset += svlen;
		1655
		1656	if (offset < 0 || offset > svlen)
		1657	croak ("offset outside of scalar");
		1658
		1659	if (!SvOK (length) || len + offset > svlen)
		1660	len = svlen - offset;
		1661
		1662	{
		1663	dREQ;
		1664
		1665	req->type = EIO_MLOCK;
		1666	req->sv2 = SvREFCNT_inc (data);
		1667	req->ptr2 = (char *)svptr + offset;
		1668	req->size = len;
		1669
		1670	REQ_SEND;
		1671	}
		1672	}
		1673
		1674	void
		1675	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1676	PPCODE:
		1677	{
		1678	dREQ;
		1679
		1680	req->type = EIO_MLOCKALL;
		1681	req->int1 = flags;
		1682
		1683	REQ_SEND;
		1684	}
		1685
		1686	void
		1687	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1688	PPCODE:
		1689	{
		1690	int fd = s_fileno_croak (fh, 0);
1353	dREQ;	1691	dREQ;
1354		1692
1355	req->type = REQ_GROUP;	1693	req->type = EIO_CUSTOM;
1356	req_send (req);	1694	req->sv1 = newSVsv (fh);
		1695	req->int1 = fd;
1357		1696
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1697	req->feed = fiemap;
1359	}	1698	#if HAVE_FIEMAP
		1699	/* keep our fingers crossed that the next two types are 64 bit */
		1700	req->offs = start;
		1701	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1702	req->int2 = flags;
		1703	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1704	#endif
1360		1705
		1706	REQ_SEND;
		1707	}
		1708
1361	void	1709	void
1362	aio_nop (callback=&PL_sv_undef)	1710	aio_busy (double delay, SV *callback = &PL_sv_undef)
1363	SV * callback
1364	PPCODE:	1711	PPCODE:
1365	{	1712	{
1366	dREQ;	1713	dREQ;
1367		1714
1368	req->type = REQ_NOP;	1715	req->type = EIO_BUSY;
		1716	req->nv1 = delay < 0. ? 0. : delay;
1369		1717
1370	REQ_SEND;	1718	REQ_SEND;
1371	}	1719	}
1372		1720
1373	void	1721	void
1374	aioreq_pri (int pri = DEFAULT_PRI)	1722	aio_group (SV *callback = &PL_sv_undef)
1375	CODE:	1723	PPCODE:
		1724	{
		1725	dREQ;
		1726
		1727	req->type = EIO_GROUP;
		1728
		1729	PUTBACK;
		1730	req_submit (req);
		1731	SPAGAIN;
		1732
		1733	XPUSHs (req_sv (req, aio_grp_stash));
		1734	}
		1735
		1736	void
		1737	aio_nop (SV *callback = &PL_sv_undef)
		1738	ALIAS:
		1739	aio_nop = EIO_NOP
		1740	aio_sync = EIO_SYNC
		1741	PPCODE:
		1742	{
		1743	dREQ;
		1744
		1745	req->type = ix;
		1746
		1747	REQ_SEND;
		1748	}
		1749
		1750	int
		1751	aioreq_pri (int pri = NO_INIT)
		1752	CODE:
		1753	RETVAL = next_pri;
		1754	if (items > 0)
		1755	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	1756	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	1757	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	1758	next_pri = pri;
		1759	}
		1760	OUTPUT:
		1761	RETVAL
1379		1762
1380	void	1763	void
1381	aioreq_nice (int nice = 0)	1764	aioreq_nice (int nice = 0)
1382	CODE:	1765	CODE:
1383	nice = next_pri - nice;	1766	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	1767	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	1768	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	1769	next_pri = nice;
1387		1770
1388	void	1771	void
1389	flush ()	1772	flush ()
1390	PROTOTYPE:
1391	CODE:	1773	CODE:
1392	while (nreqs)	1774	while (eio_nreqs ())
1393	{	1775	{
1394	poll_wait ();	1776	poll_wait ();
1395	poll_cb ();	1777	poll_cb ();
1396	}	1778	}
1397		1779
1398	void	1780	int
1399	poll()	1781	poll ()
1400	PROTOTYPE:
1401	CODE:	1782	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	1783	poll_wait ();
1405	poll_cb ();	1784	RETVAL = poll_cb ();
1406	}
1407
1408	int
1409	poll_fileno()
1410	PROTOTYPE:
1411	CODE:
1412	RETVAL = respipe [0];
1413	OUTPUT:	1785	OUTPUT:
1414	RETVAL	1786	RETVAL
1415		1787
1416	int	1788	int
		1789	poll_fileno ()
		1790	CODE:
		1791	RETVAL = s_epipe_fd (&respipe);
		1792	OUTPUT:
		1793	RETVAL
		1794
		1795	int
1417	poll_cb(...)	1796	poll_cb (...)
1418	PROTOTYPE:	1797	PROTOTYPE:
1419	CODE:	1798	CODE:
1420	RETVAL = poll_cb ();	1799	RETVAL = poll_cb ();
1421	OUTPUT:	1800	OUTPUT:
1422	RETVAL	1801	RETVAL
1423		1802
1424	void	1803	void
1425	poll_wait()	1804	poll_wait ()
1426	PROTOTYPE:
1427	CODE:	1805	CODE:
1428	if (nreqs)
1429	poll_wait ();	1806	poll_wait ();
1430		1807
1431	int	1808	int
1432	nreqs()	1809	nreqs ()
1433	PROTOTYPE:
1434	CODE:	1810	CODE:
1435	RETVAL = nreqs;	1811	RETVAL = eio_nreqs ();
1436	OUTPUT:	1812	OUTPUT:
1437	RETVAL	1813	RETVAL
1438		1814
		1815	int
		1816	nready ()
		1817	CODE:
		1818	RETVAL = eio_nready ();
		1819	OUTPUT:
		1820	RETVAL
		1821
		1822	int
		1823	npending ()
		1824	CODE:
		1825	RETVAL = eio_npending ();
		1826	OUTPUT:
		1827	RETVAL
		1828
		1829	int
		1830	nthreads ()
		1831	CODE:
		1832	RETVAL = eio_nthreads ();
		1833	OUTPUT:
		1834	RETVAL
		1835
		1836	int
		1837	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1838	CODE:
		1839	RETVAL = posix_fadvise (fh, offset, length, advice);
		1840	OUTPUT:
		1841	RETVAL
		1842
		1843	IV
		1844	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1845	CODE:
		1846	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1847	OUTPUT:
		1848	RETVAL
		1849
		1850	void
		1851	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1852	PPCODE:
		1853	sv_unmagic (scalar, MMAP_MAGIC);
		1854	{
		1855	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1856	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1857	if (addr == (void *)-1)
		1858	XSRETURN_NO;
		1859
		1860	sv_force_normal (scalar);
		1861
		1862	/* we store the length in mg_obj, as namlen is I32 :/ */
		1863	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1864	->mg_obj = (SV *)length;
		1865
		1866	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1867
		1868	if (!(prot & PROT_WRITE))
		1869	SvREADONLY_on (scalar);
		1870
		1871	if (SvLEN (scalar))
		1872	Safefree (SvPVX (scalar));
		1873
		1874	SvPVX (scalar) = (char *)addr;
		1875	SvCUR_set (scalar, length);
		1876	SvLEN_set (scalar, 0);
		1877	SvPOK_only (scalar);
		1878
		1879	XSRETURN_YES;
		1880	}
		1881
		1882	void
		1883	munmap (SV *scalar)
		1884	CODE:
		1885	sv_unmagic (scalar, MMAP_MAGIC);
		1886
		1887	int
		1888	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1889	ALIAS:
		1890	mprotect = 1
		1891	CODE:
		1892	{
		1893	STRLEN svlen;
		1894	void *addr = SvPVbyte (scalar, svlen);
		1895	STRLEN len = SvUV (length);
		1896
		1897	if (offset < 0)
		1898	offset += svlen;
		1899
		1900	if (offset < 0 || offset > svlen)
		1901	croak ("offset outside of scalar");
		1902
		1903	if (!SvOK (length) || len + offset > svlen)
		1904	len = svlen - offset;
		1905
		1906	addr = (void *)(((intptr_t)addr) + offset);
		1907	eio_page_align (&addr, &len);
		1908
		1909	switch (ix)
		1910	{
		1911	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1912	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1913	}
		1914	}
		1915	OUTPUT:
		1916	RETVAL
		1917
		1918	int
		1919	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1920	CODE:
		1921	{
		1922	STRLEN svlen;
		1923	void *addr = SvPVbyte (scalar, svlen);
		1924	size_t len = SvUV (length);
		1925
		1926	if (offset < 0)
		1927	offset += svlen;
		1928
		1929	if (offset < 0 || offset > svlen)
		1930	croak ("offset outside of scalar");
		1931
		1932	if (!SvOK (length) || len + offset > svlen)
		1933	len = svlen - offset;
		1934
		1935	addr = (void *)(((intptr_t)addr) + offset);
		1936	eio_page_align (&addr, &len);
		1937	#if _POSIX_MEMLOCK_RANGE
		1938	RETVAL = munlock (addr, len);
		1939	#else
		1940	RETVAL = EIO_ENOSYS ();
		1941	#endif
		1942	}
		1943	OUTPUT:
		1944	RETVAL
		1945
		1946	int
		1947	munlockall ()
		1948	CODE:
		1949	#if _POSIX_MEMLOCK
		1950	munlockall ();
		1951	#else
		1952	RETVAL = EIO_ENOSYS ();
		1953	#endif
		1954	OUTPUT:
		1955	RETVAL
		1956
		1957	int
		1958	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1959	CODE:
		1960	{
		1961	#if HAVE_LINUX_SPLICE
		1962	loff_t off_in_, off_out_;
		1963	RETVAL = splice (
		1964	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1965	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1966	length, flags
		1967	);
		1968	#else
		1969	RETVAL = EIO_ENOSYS ();
		1970	#endif
		1971	}
		1972	OUTPUT:
		1973	RETVAL
		1974
		1975	int
		1976	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1977	CODE:
		1978	#if HAVE_LINUX_SPLICE
		1979	RETVAL = tee (rfh, wfh, length, flags);
		1980	#else
		1981	RETVAL = EIO_ENOSYS ();
		1982	#endif
		1983	OUTPUT:
		1984	RETVAL
		1985
		1986	int
		1987	pipesize (aio_rfd rfh, int new_size = -1)
		1988	PROTOTYPE: $;$
		1989	CODE:
		1990	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1991	if (new_size >= 0)
		1992	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1993	else
		1994	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1995	#else
		1996	errno = ENOSYS;
		1997	RETVAL = -1;
		1998	#endif
		1999	OUTPUT:
		2000	RETVAL
		2001
		2002	void
		2003	pipe2 (int flags = 0)
		2004	PROTOTYPE: ;$
		2005	PPCODE:
		2006	{
		2007	int fd[2];
		2008	int res;
		2009
		2010	if (flags)
		2011	#if HAVE_PIPE2
		2012	res = pipe2 (fd, flags);
		2013	#else
		2014	res = (errno = ENOSYS, -1);
		2015	#endif
		2016	else
		2017	res = pipe (fd);
		2018
		2019	if (!res)
		2020	{
		2021	EXTEND (SP, 2);
		2022	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2023	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2024	}
		2025	}
		2026
		2027	void _on_next_submit (SV *cb)
		2028	CODE:
		2029	SvREFCNT_dec (on_next_submit);
		2030	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2031
1439	PROTOTYPES: DISABLE	2032	PROTOTYPES: DISABLE
		2033
		2034	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2035
		2036	BOOT:
		2037	{
		2038	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2039	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2040	}
		2041
		2042	void
		2043	DESTROY (SV *self)
		2044	CODE:
		2045	{
		2046	aio_wd wd = SvAIO_WD (self);
		2047	#if HAVE_AT
		2048	{
		2049	SV *callback = &PL_sv_undef;
		2050	dREQ; /* clobbers next_pri :/ */
		2051	next_pri = req->pri; /* restore next_pri */
		2052	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2053	req->type = EIO_WD_CLOSE;
		2054	req->wd = wd;
		2055	REQ_SEND;
		2056	}
		2057	#else
		2058	eio_wd_close_sync (wd);
		2059	#endif
		2060	}
1440		2061
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	2062	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		2063
1443	void	2064	void
1444	cancel (aio_req_ornot req)	2065	cancel (aio_req_ornot req)
1445	CODE:	2066	CODE:
1446	req_cancel (req);	2067	eio_cancel (req);
1447		2068
1448	void	2069	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	2070	cb (aio_req_ornot req, SV *callback = NO_INIT)
1450	CODE:	2071	PPCODE:
		2072	{
		2073	if (GIMME_V != G_VOID)
		2074	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2075
		2076	if (items > 1)
		2077	{
		2078	SV *cb_cv = get_cb (callback);
		2079
1451	SvREFCNT_dec (req->callback);	2080	SvREFCNT_dec (req->callback);
1452	req->callback = newSVsv (callback);	2081	req->callback = SvREFCNT_inc (cb_cv);
		2082	}
		2083	}
1453		2084
1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	2085	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455		2086
1456	void	2087	void
1457	add (aio_req grp, ...)	2088	add (aio_req grp, ...)
1458	PPCODE:	2089	PPCODE:
1459	{	2090	{
1460	int i;	2091	int i;
1461	aio_req req;
1462		2092
1463	if (grp->fd == 2)	2093	if (grp->int1 == 2)
1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");	2094	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1465		2095
1466	for (i = 1; i < items; ++i )	2096	for (i = 1; i < items; ++i )
1467	{	2097	{
		2098	aio_req req;
		2099
1468	if (GIMME_V != G_VOID)	2100	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	2101	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		2102
1471	req = SvAIO_REQ (ST (i));	2103	req = SvAIO_REQ (ST (i));
1472		2104
1473	if (req)	2105	if (req)
1474	{	2106	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	2107	}
1487	}	2108	}
1488		2109
1489	void	2110	void
1490	cancel_subs (aio_req_ornot req)	2111	cancel_subs (aio_req_ornot req)
…		…
1494	void	2115	void
1495	result (aio_req grp, ...)	2116	result (aio_req grp, ...)
1496	CODE:	2117	CODE:
1497	{	2118	{
1498	int i;	2119	int i;
		2120	AV *av;
		2121
		2122	grp->errorno = errno;
		2123
1499	AV *av = newAV ();	2124	av = newAV ();
		2125	av_extend (av, items - 1);
1500		2126
1501	for (i = 1; i < items; ++i )	2127	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	2128	av_push (av, newSVsv (ST (i)));
1503		2129
1504	SvREFCNT_dec (grp->data);	2130	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	2131	grp->sv1 = (SV *)av;
1506	}	2132	}
		2133
		2134	void
		2135	errno (aio_req grp, int errorno = errno)
		2136	CODE:
		2137	grp->errorno = errorno;
1507		2138
1508	void	2139	void
1509	limit (aio_req grp, int limit)	2140	limit (aio_req grp, int limit)
1510	CODE:	2141	CODE:
1511	grp->fd2 = limit;	2142	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		2143
1514	void	2144	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	2145	feed (aio_req grp, SV *callback = &PL_sv_undef)
1516	CODE:	2146	CODE:
1517	{	2147	{
1518	SvREFCNT_dec (grp->fh2);	2148	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	2149	grp->sv2 = newSVsv (callback);
		2150	grp->feed = aio_grp_feed;
1520		2151
1521	if (grp->fd2 <= 0)	2152	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	2153	grp->int2 = 2;
1523		2154
1524	aio_grp_feed (grp);	2155	eio_grp_limit (grp, grp->int2);
1525	}	2156	}
1526		2157

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