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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.80 by root, Fri Oct 27 19:17:23 2006 UTC vs.
Revision 1.210 by root, Fri Apr 6 11:39:25 2012 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
34	# if __linux	24	#if __linux__
35	# include <sys/sendfile.h>	25	# include <linux/fs.h>
36	# elif __freebsd	26	# ifdef FS_IOC_FIEMAP
37	# include <sys/socket.h>	27	# include <linux/fiemap.h>
38	# include <sys/uio.h>	28	# define HAVE_FIEMAP 1
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>
43	# else
44	# error sendfile support requested but not available
45	# endif	29	# endif
46	#endif	30	#endif
47		31
48	/* used for struct dirent, AIX doesn't provide it */	32	/* perl namespace pollution */
49	#ifndef NAME_MAX	33	#undef VERSION
50	# define NAME_MAX 4096	34
		35	/* perl stupidly overrides readdir and maybe others */
		36	/* with thread-unsafe versions, imagine that :( */
		37	#undef readdir
		38	#undef opendir
		39	#undef closedir
		40
		41	#ifdef _WIN32
		42
		43	// perl overrides all those nice libc functions
		44
		45	#undef malloc
		46	#undef free
		47	#undef open
		48	#undef read
		49	#undef write
		50	#undef send
		51	#undef recv
		52	#undef stat
		53	#undef lstat
		54	#undef fstat
		55	#undef truncate
		56	#undef ftruncate
		57	#undef open
		58	#undef link
		59	#undef close
		60	#undef unlink
		61	#undef mkdir
		62	#undef rmdir
		63	#undef rename
		64	#undef lseek
		65	#undef opendir
		66	#undef readdir
		67	#undef closedir
		68	#undef chmod
		69	#undef fchmod
		70	#undef dup
		71	#undef dup2
		72	#undef abort
		73	#undef pipe
		74
		75	#define EIO_STRUCT_STAT struct _stati64
		76	#define EIO_STRUCT_STATI64
		77
		78	#else
		79
		80	#include <sys/time.h>
		81	#include <sys/select.h>
		82	#include <unistd.h>
		83	#include <utime.h>
		84	#include <signal.h>
		85
		86	#define EIO_STRUCT_STAT Stat_t
		87
51	#endif	88	#endif
52		89
53	#ifndef PTHREAD_STACK_MIN	90	/*****************************************************************************/
54	/* care for broken platforms, e.g. windows */	91
55	# define PTHREAD_STACK_MIN 16384	92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
56	#endif	96	#endif
57		97
58	#if __ia64	98	#define expect_false(expr) expect ((expr) != 0, 0)
59	# define STACKSIZE 65536	99	#define expect_true(expr) expect ((expr) != 0, 1)
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	100
61	# define STACKSIZE PTHREAD_STACK_MIN	101	/*****************************************************************************/
62	#else	102
63	# define STACKSIZE 16384	103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	#if !HAVE_POSIX_FADVISE
		129	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
64	#endif	130	#endif
65		131
66	/* wether word reads are potentially non-atomic.	132	#if !HAVE_POSIX_MADVISE
67	* this is conservatice, likely most arches this runs	133	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
68	* on have atomic word read/writes.	134	#endif
69	*/	135
70	#ifndef WORDREAD_UNSAFE	136	#ifndef MAP_ANONYMOUS
71	# if __i386 || __x86_64	137	# ifdef MAP_ANON
72	# define WORDREAD_UNSAFE 0	138	# define MAP_ANONYMOUS MAP_ANON
73	# else	139	# else
74	# define WORDREAD_UNSAFE 1	140	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
75	# endif	141	# endif
76	#endif	142	#endif
77		143
78	/* buffer size for various temporary buffers */	144	/* defines all sorts of constants to 0 unless they are already defined */
79	#define AIO_BUFSIZE 65536	145	#include "def0.h"
80		146
81	#define dBUF \	147	#ifndef makedev
82	char *aio_buf; \	148	# define makedev(maj,min) (((maj) << 8) | (min))
83	LOCK (wrklock); \	149	#endif
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	150	#ifndef major
85	UNLOCK (wrklock); \	151	# define major(dev) ((dev) >> 8)
86	if (!aio_buf) \	152	#endif
		153	#ifndef minor
		154	# define minor(dev) ((dev) & 0xff)
		155	#endif
		156
		157	#ifndef PAGESIZE
		158	# define PAGESIZE sysconf (_SC_PAGESIZE)
		159	#endif
		160
		161	/*****************************************************************************/
		162
		163	static void
		164	fiemap (eio_req *req)
		165	{
		166	req->result = -1;
		167
		168	#if HAVE_FIEMAP
		169	for (;;)
		170	{
		171	int count = req->int3;
		172
		173	if (count < 0)
		174	{
		175	struct fiemap fiemap;
		176
		177	fiemap.fm_start = req->offs;
		178	fiemap.fm_length = req->size;
		179	fiemap.fm_flags = req->int2;
		180	fiemap.fm_extent_count = 0;
		181
		182	if (ioctl (req->int1, FS_IOC_FIEMAP, &fiemap))
		183	return;
		184
		185	count = fiemap.fm_mapped_extents;
		186	}
		187
		188	struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		189	errno = ENOMEM;
		190	if (!fiemap)
87	return -1;	191	return;
		192
		193	req->ptr1 = fiemap;
		194	req->flags |= EIO_FLAG_PTR1_FREE;
		195
		196	fiemap->fm_start = req->offs;
		197	fiemap->fm_length = req->size;
		198	fiemap->fm_flags = req->int2;
		199	fiemap->fm_extent_count = count;
		200
		201	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		202	return;
		203
		204	if (req->int3 >= 0)
		205	break; /* when not autosizing we are done */
		206
		207	if (fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST)
		208	break; /* autosizing successful, we are done */
		209
		210	free (fiemap);
		211	}
		212
		213	req->result = 0;
		214
		215	#else
		216	errno = ENOSYS;
		217	#endif
		218	}
		219
		220	/*****************************************************************************/
88		221
89	enum {	222	enum {
90	REQ_QUIT,	223	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};	224	};
102		225
103	#define AIO_REQ_KLASS "IO::AIO::REQ"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"
105
106	typedef struct aio_cb
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;
111	SV *fh, *fh2;
112	void *dataptr, *data2ptr;
113	Stat_t *statdata;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117
118	STRLEN dataoffset;
119	int type;
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123
124	unsigned char flags;
125	unsigned char pri;
126
127	SV *self; /* the perl counterpart of this request, if any */
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
129	} aio_cb;
130
131	enum {
132	FLAG_CANCELLED = 0x01,
133	};
134
135	typedef aio_cb *aio_req;	226	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	227	typedef eio_req *aio_req_ornot;
		228	typedef eio_wd aio_wd;
137		229
138	enum {	230	static SV *on_next_submit;
139	PRI_MIN = -4,	231	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	232	static int max_outstanding;
141		233
142	DEFAULT_PRI = 0,	234	static s_epipe respipe;
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146		235
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150
151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153	#else
154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155	#endif
156
157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160	/* worker threads management */
161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163	typedef struct worker {
164	/* locked by wrklock */
165	struct worker *prev, *next;
166
167	pthread_t tid;
168
169	/* locked by reslock, reqlock or wrklock */
170	aio_req req; /* currently processed request */
171	void *dbuf;
172	DIR *dirp;
173	} worker;
174
175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177	static void worker_clear (worker *wrk)
178	{
179	if (wrk->dirp)
180	{
181	closedir (wrk->dirp);
182	wrk->dirp = 0;
183	}
184
185	if (wrk->dbuf)
186	{
187	free (wrk->dbuf);
188	wrk->dbuf = 0;
189	}
190	}
191
192	static void worker_free (worker *wrk)
193	{
194	wrk->next->prev = wrk->prev;
195	wrk->prev->next = wrk->next;
196
197	free (wrk);
198	}
199
200	static volatile unsigned int nreqs, nready, npending;
201	static volatile unsigned int max_outstanding = 0xffffffff;
202	static int respipe [2];
203
204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
207
208	#if WORDREAD_UNSAFE
209
210	static unsigned int get_nready ()
211	{
212	unsigned int retval;
213
214	LOCK (reqlock);
215	retval = nready;
216	UNLOCK (reqlock);
217
218	return retval;
219	}
220
221	static unsigned int get_npending ()
222	{
223	unsigned int retval;
224
225	LOCK (reslock);
226	retval = npending;
227	UNLOCK (reslock);
228
229	return retval;
230	}
231
232	#else
233
234	# define get_nready() nready
235	# define get_npending() npending
236
237	#endif
238
239	/*
240	* a somewhat faster data structure might be nice, but
241	* with 8 priorities this actually needs <20 insns
242	* per shift, the most expensive operation.
243	*/
244	typedef struct {
245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246	int size;
247	} reqq;
248
249	static reqq req_queue;
250	static reqq res_queue;
251
252	int reqq_push (reqq *q, aio_req req)
253	{
254	int pri = req->pri;
255	req->next = 0;
256
257	if (q->qe[pri])
258	{
259	q->qe[pri]->next = req;
260	q->qe[pri] = req;
261	}
262	else
263	q->qe[pri] = q->qs[pri] = req;
264
265	return q->size++;
266	}
267
268	aio_req reqq_shift (reqq *q)
269	{
270	int pri;
271
272	if (!q->size)
273	return 0;
274
275	--q->size;
276
277	for (pri = NUM_PRI; pri--; )
278	{
279	aio_req req = q->qs[pri];
280
281	if (req)
282	{
283	if (!(q->qs[pri] = req->next))
284	q->qe[pri] = 0;
285
286	return req;
287	}
288	}
289
290	abort ();
291	}
292
293	static int poll_cb (int max);
294	static void req_invoke (aio_req req);
295	static void req_free (aio_req req);	236	static void req_destroy (aio_req req);
296	static void req_cancel (aio_req req);	237	static void req_cancel (aio_req req);
297		238
		239	static void
		240	want_poll (void)
		241	{
		242	/* write a dummy byte to the pipe so fh becomes ready */
		243	s_epipe_signal (&respipe);
		244	}
		245
		246	static void
		247	done_poll (void)
		248	{
		249	/* read any signals sent by the worker threads */
		250	s_epipe_drain (&respipe);
		251	}
		252
298	/* must be called at most once */	253	/* must be called at most once */
299	static SV *req_sv (aio_req req, const char *klass)	254	static SV *
		255	req_sv (aio_req req, HV *stash)
300	{	256	{
301	if (!req->self)	257	if (!req->self)
302	{	258	{
303	req->self = (SV *)newHV ();	259	req->self = (SV *)newHV ();
304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305	}	261	}
306		262
307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	263	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
308	}	264	}
309		265
310	static aio_req SvAIO_REQ (SV *sv)	266	static SV *
		267	newSVaio_wd (aio_wd wd)
		268	{
		269	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		270	}
		271
		272	static aio_req
		273	SvAIO_REQ (SV *sv)
311	{	274	{
312	MAGIC *mg;	275	MAGIC *mg;
313		276
314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	277	if (!SvROK (sv)
		278	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		279	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		280	&& SvSTASH (SvRV (sv)) != aio_req_stash
		281	&& !sv_derived_from (sv, "IO::AIO::REQ")))
315	croak ("object of class " AIO_REQ_KLASS " expected");	282	croak ("object of class IO::AIO::REQ expected");
316		283
317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	284	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318		285
319	return mg ? (aio_req)mg->mg_ptr : 0;	286	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	287	}
321		288
		289	static aio_wd
		290	SvAIO_WD (SV *sv)
		291	{
		292	if (!SvROK (sv)
		293	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		294	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		295	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		296
		297	return (aio_wd)(long)SvIVX (SvRV (sv));
		298	}
		299
		300	static void
322	static void aio_grp_feed (aio_req grp)	301	aio_grp_feed (aio_req grp)
323	{	302	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	303	if (grp->sv2 && SvOK (grp->sv2))
325	{	304	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	305	dSP;
331		306
332	ENTER;	307	ENTER;
333	SAVETMPS;	308	SAVETMPS;
334	PUSHMARK (SP);	309	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	310	XPUSHs (req_sv (grp, aio_grp_stash));
336	PUTBACK;	311	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	312	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	313	SPAGAIN;
339	FREETMPS;	314	FREETMPS;
340	LEAVE;	315	LEAVE;
341	}
342
343	/* stop if no progress has been made */
344	if (old_len == grp->length)
345	{
346	SvREFCNT_dec (grp->fh2);
347	grp->fh2 = 0;
348	break;
349	}
350	}	316	}
351	}	317	}
352		318
353	static void aio_grp_dec (aio_req grp)	319	static void
		320	req_submit (eio_req *req)
354	{	321	{
355	--grp->length;	322	eio_submit (req);
356		323
357	/* call feeder, if applicable */	324	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	325	{
363	req_invoke (grp);	326	dSP;
364	req_free (grp);	327	SV *cb = sv_2mortal (on_next_submit);
		328
		329	on_next_submit = 0;
		330
		331	PUSHMARK (SP);
		332	PUTBACK;
		333	call_sv (cb, G_DISCARD | G_EVAL);
365	}	334	}
366	}	335	}
367		336
		337	static int
368	static void req_invoke (aio_req req)	338	req_invoke (eio_req *req)
369	{	339	{
370	dSP;	340	if (req->flags & FLAG_SV2_RO_OFF)
		341	SvREADONLY_off (req->sv2);
371		342
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	343	if (!EIO_CANCELLED (req) && req->callback)
373	{	344	{
		345	dSP;
		346	static SV *sv_result_cache; /* caches the result integer SV */
		347	SV *sv_result;
		348
374	ENTER;	349	ENTER;
375	SAVETMPS;	350	SAVETMPS;
376	PUSHMARK (SP);	351	PUSHMARK (SP);
377	EXTEND (SP, 1);	352	EXTEND (SP, 1);
378		353
		354	/* do not recreate the result IV from scratch each time */
		355	if (expect_true (sv_result_cache))
		356	{
		357	sv_result = sv_result_cache; sv_result_cache = 0;
		358	SvIV_set (sv_result, req->result);
		359	SvIOK_only (sv_result);
		360	}
		361	else
		362	{
		363	sv_result = newSViv (req->result);
		364	SvREADONLY_on (sv_result);
		365	}
		366
379	switch (req->type)	367	switch (req->type)
380	{	368	{
		369	case EIO_WD_OPEN:
		370	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		371	break;
		372
381	case REQ_READDIR:	373	case EIO_READDIR:
382	{	374	{
383	SV *rv = &PL_sv_undef;	375	SV *rv = &PL_sv_undef;
384		376
385	if (req->result >= 0)	377	if (req->result >= 0)
386	{	378	{
387	int i;	379	int i;
388	char *buf = req->data2ptr;	380	char *names = (char *)req->ptr2;
		381	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	382	AV *av = newAV ();
390		383
391	av_extend (av, req->result - 1);	384	av_extend (av, req->result - 1);
392		385
393	for (i = 0; i < req->result; ++i)	386	for (i = 0; i < req->result; ++i)
394	{	387	{
395	SV *sv = newSVpv (buf, 0);	388	if (req->int1 & EIO_READDIR_DENTS)
		389	{
		390	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		391
		392	if (req->int1 & EIO_READDIR_CUSTOM2)
		393	{
		394	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		395	AV *avent = newAV ();
		396
		397	av_extend (avent, 2);
		398
		399	if (!sv_type [ent->type])
		400	{
		401	sv_type [ent->type] = newSViv (ent->type);
		402	SvREADONLY_on (sv_type [ent->type]);
		403	}
		404
		405	av_store (avent, 0, namesv);
		406	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		407	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		408
		409	av_store (av, i, newRV_noinc ((SV *)avent));
		410	}
		411	else
397	av_store (av, i, sv);	412	av_store (av, i, namesv);
		413
		414	++ent;
		415	}
		416	else
		417	{
		418	SV *name = newSVpv (names, 0);
		419	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	420	names += SvCUR (name) + 1;
		421	}
399	}	422	}
400		423
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	424	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	425	}
403		426
404	PUSHs (rv);	427	PUSHs (rv);
		428
		429	if (req->int1 & EIO_READDIR_CUSTOM1)
		430	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	431	}
406	break;	432	break;
407		433
408	case REQ_OPEN:	434	case EIO_OPEN:
409	{	435	{
410	/* convert fd to fh */	436	/* convert fd to fh */
411	SV *fh;	437	SV *fh = &PL_sv_undef;
412		438
413	PUSHs (sv_2mortal (newSViv (req->result)));	439	if (req->result >= 0)
414	PUTBACK;	440	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	441	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	442	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		443	char sym [64];
		444	int symlen;
		445
		446	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		447	gv_init (gv, aio_stash, sym, symlen, 0);
417		448
418	fh = SvREFCNT_inc (POPs);	449	symlen = snprintf (
		450	sym,
		451	sizeof (sym),
		452	"%s&=%d",
		453	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		454	(int)req->result
		455	);
419		456
		457	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		458	fh = (SV *)gv;
		459	}
		460
420	PUSHMARK (SP);	461	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	462	}
423	break;	463	break;
424		464
		465	case EIO_STATVFS:
		466	case EIO_FSTATVFS:
		467	{
		468	SV *rv = &PL_sv_undef;
		469
		470	#ifndef _WIN32
		471	if (req->result >= 0)
		472	{
		473	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		474	HV *hv = newHV ();
		475
		476	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		477
		478	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		479	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		480	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		481	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		482	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		483	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		484	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		485	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		486	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		487	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		488	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		489	}
		490	#endif
		491
		492	PUSHs (rv);
		493	}
		494
		495	break;
		496
425	case REQ_GROUP:	497	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	498	req->int1 = 2; /* mark group as finished */
427		499
428	if (req->data)	500	if (req->sv1)
429	{	501	{
430	int i;	502	int i;
431	AV *av = (AV *)req->data;	503	AV *av = (AV *)req->sv1;
432		504
433	EXTEND (SP, AvFILL (av) + 1);	505	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	506	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	507	PUSHs (*av_fetch (av, i, 0));
436	}	508	}
437	break;	509	break;
438		510
439	case REQ_NOP:	511	case EIO_NOP:
440	case REQ_BUSY:	512	case EIO_BUSY:
441	break;	513	break;
442		514
		515	case EIO_READLINK:
		516	case EIO_REALPATH:
		517	if (req->result > 0)
		518	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		519	break;
		520
		521	case EIO_STAT:
		522	case EIO_LSTAT:
		523	case EIO_FSTAT:
		524	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		525
		526	if (!(PL_laststatval = req->result))
		527	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		528	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		529
		530	PUSHs (sv_result);
		531	break;
		532
		533	case EIO_SEEK:
		534	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		535	break;
		536
		537	case EIO_READ:
		538	{
		539	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		540	*SvEND (req->sv2) = 0;
		541	SvPOK_only (req->sv2);
		542	SvSETMAGIC (req->sv2);
		543	PUSHs (sv_result);
		544	}
		545	break;
		546
		547	case EIO_CUSTOM:
		548	if (req->feed == fiemap)
		549	{
		550	if (!req->result)
		551	{
		552	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		553
		554	if (fiemap->fm_extent_count)
		555	{
		556	AV *av = newAV ();
		557	int i;
		558
		559	while (fiemap->fm_mapped_extents)
		560	{
		561	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		562	AV *ext_av = newAV ();
		563
		564	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		565	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		566	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		567	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		568
		569	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		570	}
		571
		572	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		573	}
		574	else
		575	{
		576	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		577	PUSHs (sv_result);
		578	}
		579	}
		580	}
		581	else
		582	PUSHs (sv_result);
		583	break;
		584
		585	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		586	if (req->result > 0)
		587	SvIV_set (sv_result, 0);
		588	/* FALLTHROUGH */
		589
443	default:	590	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	591	PUSHs (sv_result);
445	break;	592	break;
446	}	593	}
447		594
448	errno = req->errorno;	595	errno = req->errorno;
449		596
450	PUTBACK;	597	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	598	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	599	SPAGAIN;
		600
		601	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		602	SvREFCNT_dec (sv_result);
		603	else
		604	sv_result_cache = sv_result;
453		605
454	FREETMPS;	606	FREETMPS;
455	LEAVE;	607	LEAVE;
		608
		609	PUTBACK;
456	}	610	}
457		611
458	if (req->grp)	612	return !!SvTRUE (ERRSV);
459	{
460	aio_req grp = req->grp;
461
462	/* unlink request */
463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466	if (grp->grp_first == req)
467	grp->grp_first = req->grp_next;
468
469	aio_grp_dec (grp);
470	}
471
472	if (SvTRUE (ERRSV))
473	{
474	req_free (req);
475	croak (0);
476	}
477	}	613	}
478		614
479	static void req_free (aio_req req)	615	static void
		616	req_destroy (aio_req req)
480	{	617	{
481	if (req->self)	618	if (req->self)
482	{	619	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	620	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	621	SvREFCNT_dec (req->self);
485	}	622	}
486		623
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	624	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	625	SvREFCNT_dec (req->sv2);
		626	SvREFCNT_dec (req->sv3);
		627	SvREFCNT_dec (req->sv4);
490	SvREFCNT_dec (req->callback);	628	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492		629
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495
496	Safefree (req);	630	free (req);
497	}	631	}
498		632
		633	static void
499	static void req_cancel_subs (aio_req grp)	634	req_cancel_subs (aio_req grp)
500	{	635	{
501	aio_req sub;
502
503	if (grp->type != REQ_GROUP)	636	if (grp->type != EIO_GROUP)
504	return;	637	return;
505		638
506	SvREFCNT_dec (grp->fh2);	639	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	640	grp->sv2 = 0;
508		641
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	642	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	643	}
512		644
513	static void req_cancel (aio_req req)	645	static void ecb_cold
		646	create_respipe (void)
514	{	647	{
515	req->flags |= FLAG_CANCELLED;	648	if (s_epipe_renew (&respipe))
516		649	croak ("IO::AIO: unable to initialize result pipe");
517	req_cancel_subs (req);
518	}	650	}
519		651
520	static void *aio_proc(void *arg);	652	static void
521		653	poll_wait (void)
522	static void start_thread (void)
523	{	654	{
524	sigset_t fullsigset, oldsigset;
525	pthread_attr_t attr;
526
527	worker *wrk = calloc (1, sizeof (worker));
528
529	if (!wrk)
530	croak ("unable to allocate worker thread data");
531
532	pthread_attr_init (&attr);
533	pthread_attr_setstacksize (&attr, STACKSIZE);
534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535	#ifdef PTHREAD_SCOPE_PROCESS
536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537	#endif
538
539	sigfillset (&fullsigset);
540
541	LOCK (wrklock);
542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
543
544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545	{
546	wrk->prev = &wrk_first;
547	wrk->next = wrk_first.next;
548	wrk_first.next->prev = wrk;
549	wrk_first.next = wrk;
550	++started;
551	}
552	else
553	free (wrk);
554
555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
556	UNLOCK (wrklock);
557	}
558
559	static void maybe_start_thread ()
560	{
561	#if 0
562	static struct timeval last;
563	struct timeval diff, now;
564	#endif
565
566	if (started >= wanted)
567	return;
568
569	if (nready <= nreqs - get_nready () - get_npending ())
570	return;
571
572	#if 0
573	gettimeofday (&now, 0);
574
575	diff.tv_sec = now.tv_sec - last.tv_sec;
576	diff.tv_usec = now.tv_usec - last.tv_usec;
577
578	if (diff.tv_usec < 0)
579	{
580	--diff.tv_sec;
581	diff.tv_usec += 1000000;
582	}
583
584	if (!diff.tv_sec && diff.tv_usec < 10000)
585	return;
586
587	last = now;
588	#endif
589
590	start_thread ();
591	}
592
593	static void req_send (aio_req req)
594	{
595	++nreqs;
596
597	LOCK (reqlock);
598	++nready;
599	reqq_push (&req_queue, req);
600	pthread_cond_signal (&reqwait);
601	UNLOCK (reqlock);
602
603	maybe_start_thread ();
604	}
605
606	static void end_thread (void)
607	{
608	aio_req req;
609
610	Newz (0, req, 1, aio_cb);
611
612	req->type = REQ_QUIT;
613	req->pri = PRI_MAX + PRI_BIAS;
614
615	req_send (req);
616
617	LOCK (wrklock);
618	--started;
619	UNLOCK (wrklock);
620	}
621
622	static void min_parallel (int nthreads)
623	{
624	if (wanted < nthreads)
625	wanted = nthreads;
626	}
627
628	static void max_parallel (int nthreads)
629	{
630	if (wanted > nthreads)
631	wanted = nthreads;
632
633	while (started > wanted)
634	end_thread ();
635	}
636
637	static void poll_wait ()
638	{
639	fd_set rfd;
640
641	while (nreqs)	655	while (eio_nreqs ())
642	{	656	{
643	int size;	657	int size;
644	if (WORDREAD_UNSAFE) LOCK (reslock);	658
		659	X_LOCK (reslock);
645	size = res_queue.size;	660	size = res_queue.size;
646	if (WORDREAD_UNSAFE) UNLOCK (reslock);	661	X_UNLOCK (reslock);
647		662
648	if (size)	663	if (size)
649	return;	664	return;
650		665
651	maybe_start_thread ();	666	etp_maybe_start_thread ();
652		667
653	FD_ZERO(&rfd);	668	s_epipe_wait (&respipe);
654	FD_SET(respipe [0], &rfd);
655
656	select (respipe [0] + 1, &rfd, 0, 0, 0);
657	}	669	}
658	}	670	}
659		671
660	static int poll_cb (int max)	672	static int
		673	poll_cb (void)
661	{	674	{
662	dSP;
663	int count = 0;
664	int do_croak = 0;
665	aio_req req;
666
667	for (;;)	675	for (;;)
668	{	676	{
669	while (max <= 0 || count < max)	677	int res = eio_poll ();
		678
		679	if (res > 0)
		680	croak (0);
		681
		682	if (!max_outstanding || max_outstanding > eio_nreqs ())
		683	return res;
		684
		685	poll_wait ();
		686	}
		687	}
		688
		689	static void ecb_cold
		690	reinit (void)
		691	{
		692	create_respipe ();
		693
		694	if (eio_init (want_poll, done_poll) < 0)
		695	croak ("IO::AIO: unable to initialise eio library");
		696	}
		697
		698	/*****************************************************************************/
		699
		700	#if !_POSIX_MAPPED_FILES
		701	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		702	# define munmap(addr,length) (errno = ENOSYS, -1)
		703	#endif
		704
		705	#if !_POSIX_MEMORY_PROTECTION
		706	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		707	# define PROT_NONE 0
		708	# define PROT_WRITE 0
		709	# define MAP_PRIVATE 0
		710	# define MAP_SHARED 0
		711	# define MAP_FIXED 0
		712	#endif
		713
		714	#define MMAP_MAGIC PERL_MAGIC_ext
		715
		716	static int ecb_cold
		717	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		718	{
		719	int old_errno = errno;
		720	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		721	errno = old_errno;
		722
		723	mg->mg_obj = 0; /* just in case */
		724
		725	SvREADONLY_off (sv);
		726
		727	if (SvPVX (sv) != mg->mg_ptr)
		728	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		729
		730	SvCUR_set (sv, 0);
		731	SvPVX (sv) = 0;
		732	SvOK_off (sv);
		733
		734	return 0;
		735	}
		736
		737	static MGVTBL mmap_vtbl = {
		738	0, 0, 0, 0, mmap_free
		739	};
		740
		741	/*****************************************************************************/
		742
		743	static SV *
		744	get_cb (SV *cb_sv)
		745	{
		746	SvGETMAGIC (cb_sv);
		747	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		748	}
		749
		750	static aio_req ecb_noinline
		751	dreq (SV *callback)
		752	{
		753	SV *cb_cv;
		754	aio_req req;
		755	int req_pri = next_pri;
		756	next_pri = EIO_PRI_DEFAULT;
		757
		758	cb_cv = get_cb (callback);
		759
		760	req = calloc (sizeof (*req), 1);
		761	if (!req)
		762	croak ("out of memory during eio_req allocation");
		763
		764	req->callback = SvREFCNT_inc (cb_cv);
		765	req->pri = req_pri;
		766
		767	return req;
		768	}
		769
		770	#define dREQ \
		771	aio_req req = dreq (callback); \
		772
		773	#define REQ_SEND \
		774	PUTBACK; \
		775	req_submit (req); \
		776	SPAGAIN; \
		777	\
		778	if (GIMME_V != G_VOID) \
		779	XPUSHs (req_sv (req, aio_req_stash));
		780
		781	ecb_inline void
		782	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		783	{
		784	if (expect_false (SvROK (path)))
		785	{
		786	SV *rv = SvRV (path);
		787	SV *wdob;
		788
		789	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
670	{	790	{
671	maybe_start_thread ();	791	path = AvARRAY (rv)[1];
		792	wdob = AvARRAY (rv)[0];
672		793
673	LOCK (reslock);	794	if (SvOK (wdob))
674	req = reqq_shift (&res_queue);
675
676	if (req)
677	{	795	{
678	--npending;	796	*wd = SvAIO_WD (wdob);
679		797	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
680	if (!res_queue.size)
681	{
682	/* read any signals sent by the worker threads */
683	char buf [32];
684	while (read (respipe [0], buf, 32) == 32)
685	;
686	}
687	}
688
689	UNLOCK (reslock);
690
691	if (!req)
692	break;
693
694	--nreqs;
695
696	if (req->type == REQ_GROUP && req->length)
697	{
698	req->fd = 1; /* mark request as delayed */
699	continue;
700	}	798	}
701	else	799	else
702	{	800	*wd = EIO_INVALID_WD;
703	if (req->type == REQ_READ)
704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
705
706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
707	SvREADONLY_off (req->data);
708
709	if (req->statdata)
710	{
711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
712	PL_laststatval = req->result;
713	PL_statcache = *(req->statdata);
714	}
715
716	req_invoke (req);
717
718	count++;
719	}
720
721	req_free (req);
722	}	801	}
		802	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		803	{
		804	*wd = (aio_wd)(long)SvIVX (rv);
		805	*wdsv = SvREFCNT_inc_NN (rv);
		806	*ptr = ".";
		807	return; /* path set to "." */
		808	}
		809	else
		810	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		811	}
723		812
724	if (nreqs <= max_outstanding)	813	*pathsv = newSVsv (path);
		814	*ptr = SvPVbyte_nolen (*pathsv);
		815	}
		816
		817	static void ecb_noinline
		818	req_set_path1 (aio_req req, SV *path)
		819	{
		820	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		821	}
		822
		823	static void ecb_noinline
		824	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		825	{
		826	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		827
		828	switch (SvTYPE (rv))
		829	{
		830	case SVt_PVIO:
		831	case SVt_PVLV:
		832	case SVt_PVGV:
		833	req->type = type_fh;
		834	req->sv1 = newSVsv (fh_or_path);
		835	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
725	break;	836	break;
726		837
727	poll_wait ();	838	default:
728		839	req->type = type_path;
729	max = 0;	840	req_set_path1 (req, fh_or_path);
		841	break;
730	}	842	}
731
732	return count;
733	}	843	}
734		844
735	static void create_pipe ()	845	XS(boot_IO__AIO) ecb_cold;
736	{
737	if (pipe (respipe))
738	croak ("unable to initialize result pipe");
739		846
740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
741	croak ("cannot set result pipe to nonblocking mode");
742
743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
744	croak ("cannot set result pipe to nonblocking mode");
745	}
746
747	/*****************************************************************************/
748	/* work around various missing functions */
749
750	#if !HAVE_PREADWRITE
751	# define pread aio_pread
752	# define pwrite aio_pwrite
753
754	/*
755	* make our pread/pwrite safe against themselves, but not against
756	* normal read/write by using a mutex. slows down execution a lot,
757	* but that's your problem, not mine.
758	*/
759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
760
761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = read (fd, buf, count);
770	lseek (fd, ooffset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775
776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
777	{
778	ssize_t res;
779	off_t ooffset;
780
781	LOCK (preadwritelock);
782	ooffset = lseek (fd, 0, SEEK_CUR);
783	lseek (fd, offset, SEEK_SET);
784	res = write (fd, buf, count);
785	lseek (fd, offset, SEEK_SET);
786	UNLOCK (preadwritelock);
787
788	return res;
789	}
790	#endif
791
792	#if !HAVE_FDATASYNC
793	# define fdatasync fsync
794	#endif
795
796	#if !HAVE_READAHEAD
797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
798
799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
800	{
801	dBUF;
802
803	while (count > 0)
804	{
805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
806
807	pread (fd, aio_buf, len, offset);
808	offset += len;
809	count -= len;
810	}
811
812	errno = 0;
813	}
814
815	#endif
816
817	#if !HAVE_READDIR_R
818	# define readdir_r aio_readdir_r
819
820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
821
822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
823	{
824	struct dirent *e;
825	int errorno;
826
827	LOCK (readdirlock);
828
829	e = readdir (dirp);
830	errorno = errno;
831
832	if (e)
833	{
834	*res = ent;
835	strcpy (ent->d_name, e->d_name);
836	}
837	else
838	*res = 0;
839
840	UNLOCK (readdirlock);
841
842	errno = errorno;
843	return e ? 0 : -1;
844	}
845	#endif
846
847	/* sendfile always needs emulation */
848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
849	{
850	ssize_t res;
851
852	if (!count)
853	return 0;
854
855	#if HAVE_SENDFILE
856	# if __linux
857	res = sendfile (ofd, ifd, &offset, count);
858
859	# elif __freebsd
860	/*
861	* Of course, the freebsd sendfile is a dire hack with no thoughts
862	* wasted on making it similar to other I/O functions.
863	*/
864	{
865	off_t sbytes;
866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
867
868	if (res < 0 && sbytes)
869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870	res = sbytes;
871	}
872
873	# elif __hpux
874	res = sendfile (ofd, ifd, offset, count, 0, 0);
875
876	# elif __solaris
877	{
878	struct sendfilevec vec;
879	size_t sbytes;
880
881	vec.sfv_fd = ifd;
882	vec.sfv_flag = 0;
883	vec.sfv_off = offset;
884	vec.sfv_len = count;
885
886	res = sendfilev (ofd, &vec, 1, &sbytes);
887
888	if (res < 0 && sbytes)
889	res = sbytes;
890	}
891
892	# endif
893	#else
894	res = -1;
895	errno = ENOSYS;
896	#endif
897
898	if (res < 0
899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
900	#if __solaris
901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
902	#endif
903	)
904	)
905	{
906	/* emulate sendfile. this is a major pain in the ass */
907	dBUF;
908
909	res = 0;
910
911	while (count)
912	{
913	ssize_t cnt;
914
915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
916
917	if (cnt <= 0)
918	{
919	if (cnt && !res) res = -1;
920	break;
921	}
922
923	cnt = write (ofd, aio_buf, cnt);
924
925	if (cnt <= 0)
926	{
927	if (cnt && !res) res = -1;
928	break;
929	}
930
931	offset += cnt;
932	res += cnt;
933	count -= cnt;
934	}
935	}
936
937	return res;
938	}
939
940	/* read a full directory */
941	static void scandir_ (aio_req req, worker *self)
942	{
943	DIR *dirp;
944	union
945	{
946	struct dirent d;
947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
948	} *u;
949	struct dirent *entp;
950	char *name, *names;
951	int memlen = 4096;
952	int memofs = 0;
953	int res = 0;
954	int errorno;
955
956	LOCK (wrklock);
957	self->dirp = dirp = opendir (req->dataptr);
958	self->dbuf = u = malloc (sizeof (*u));
959	req->data2ptr = names = malloc (memlen);
960	UNLOCK (wrklock);
961
962	if (dirp && u && names)
963	for (;;)
964	{
965	errno = 0;
966	readdir_r (dirp, &u->d, &entp);
967
968	if (!entp)
969	break;
970
971	name = entp->d_name;
972
973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
974	{
975	int len = strlen (name) + 1;
976
977	res++;
978
979	while (memofs + len > memlen)
980	{
981	memlen *= 2;
982	LOCK (wrklock);
983	req->data2ptr = names = realloc (names, memlen);
984	UNLOCK (wrklock);
985
986	if (!names)
987	break;
988	}
989
990	memcpy (names + memofs, name, len);
991	memofs += len;
992	}
993	}
994
995	if (errno)
996	res = -1;
997
998	req->result = res;
999	}
1000
1001	/*****************************************************************************/
1002
1003	static void *aio_proc (void *thr_arg)
1004	{
1005	aio_req req;
1006	worker *self = (worker *)thr_arg;
1007
1008	for (;;)
1009	{
1010	LOCK (reqlock);
1011
1012	for (;;)
1013	{
1014	self->req = req = reqq_shift (&req_queue);
1015
1016	if (req)
1017	break;
1018
1019	pthread_cond_wait (&reqwait, &reqlock);
1020	}
1021
1022	--nready;
1023
1024	UNLOCK (reqlock);
1025
1026	errno = 0; /* strictly unnecessary */
1027
1028	if (!(req->flags & FLAG_CANCELLED))
1029	switch (req->type)
1030	{
1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1033
1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1036
1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1040
1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1042	case REQ_CLOSE: req->result = close (req->fd); break;
1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1048
1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
1051	case REQ_READDIR: scandir_ (req, self); break;
1052
1053	case REQ_BUSY:
1054	{
1055	struct timeval tv;
1056
1057	tv.tv_sec = req->fd;
1058	tv.tv_usec = req->fd2;
1059
1060	req->result = select (0, 0, 0, 0, &tv);
1061	}
1062
1063	case REQ_GROUP:
1064	case REQ_NOP:
1065	break;
1066
1067	case REQ_QUIT:
1068	LOCK (wrklock);
1069	worker_free (self);
1070	--started;
1071	UNLOCK (wrklock);
1072	return 0;
1073
1074	default:
1075	req->result = ENOSYS;
1076	break;
1077	}
1078
1079	req->errorno = errno;
1080
1081	LOCK (reslock);
1082
1083	++npending;
1084
1085	if (!reqq_push (&res_queue, req))
1086	/* write a dummy byte to the pipe so fh becomes ready */
1087	write (respipe [1], &respipe, 1);
1088
1089	self->req = 0;
1090	worker_clear (self);
1091
1092	UNLOCK (reslock);
1093	}
1094	}
1095
1096	/*****************************************************************************/
1097
1098	static void atfork_prepare (void)
1099	{
1100	LOCK (wrklock);
1101	LOCK (reqlock);
1102	LOCK (reslock);
1103	#if !HAVE_PREADWRITE
1104	LOCK (preadwritelock);
1105	#endif
1106	#if !HAVE_READDIR_R
1107	LOCK (readdirlock);
1108	#endif
1109	}
1110
1111	static void atfork_parent (void)
1112	{
1113	#if !HAVE_READDIR_R
1114	UNLOCK (readdirlock);
1115	#endif
1116	#if !HAVE_PREADWRITE
1117	UNLOCK (preadwritelock);
1118	#endif
1119	UNLOCK (reslock);
1120	UNLOCK (reqlock);
1121	UNLOCK (wrklock);
1122	}
1123
1124	static void atfork_child (void)
1125	{
1126	aio_req prv;
1127
1128	while (prv = reqq_shift (&req_queue))
1129	req_free (prv);
1130
1131	while (prv = reqq_shift (&res_queue))
1132	req_free (prv);
1133
1134	while (wrk_first.next != &wrk_first)
1135	{
1136	worker *wrk = wrk_first.next;
1137
1138	if (wrk->req)
1139	req_free (wrk->req);
1140
1141	worker_clear (wrk);
1142	worker_free (wrk);
1143	}
1144
1145	started = 0;
1146	nreqs = 0;
1147
1148	close (respipe [0]);
1149	close (respipe [1]);
1150	create_pipe ();
1151
1152	atfork_parent ();
1153	}
1154
1155	#define dREQ \
1156	aio_req req; \
1157	int req_pri = next_pri; \
1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
1159	\
1160	if (SvOK (callback) && !SvROK (callback)) \
1161	croak ("callback must be undef or of reference type"); \
1162	\
1163	Newz (0, req, 1, aio_cb); \
1164	if (!req) \
1165	croak ("out of memory during aio_req allocation"); \
1166	\
1167	req->callback = newSVsv (callback); \
1168	req->pri = req_pri
1169
1170	#define REQ_SEND \
1171	req_send (req); \
1172	\
1173	if (GIMME_V != G_VOID) \
1174	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1175
1176	MODULE = IO::AIO PACKAGE = IO::AIO	847	MODULE = IO::AIO PACKAGE = IO::AIO
1177		848
1178	PROTOTYPES: ENABLE	849	PROTOTYPES: ENABLE
1179		850
1180	BOOT:	851	BOOT:
1181	{	852	{
		853	static const struct {
		854	const char *name;
		855	IV iv;
		856	} *civ, const_iv[] = {
		857	# define const_niv(name, value) { # name, (IV) value },
		858	# define const_iv(name) { # name, (IV) name },
		859	# define const_eio(name) { # name, (IV) EIO_ ## name },
		860
		861	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		862
		863	const_iv (ENOSYS)
		864	const_iv (EXDEV)
		865	const_iv (EBADR)
		866
		867	const_iv (O_RDONLY)
		868	const_iv (O_WRONLY)
		869	const_iv (O_RDWR)
		870	const_iv (O_CREAT)
		871	const_iv (O_TRUNC)
		872	const_iv (O_EXCL)
		873	const_iv (O_APPEND)
		874
		875	const_iv (O_ASYNC)
		876	const_iv (O_DIRECT)
		877	const_iv (O_NOATIME)
		878
		879	const_iv (O_CLOEXEC)
		880	const_iv (O_NOCTTY)
		881	const_iv (O_NOFOLLOW)
		882	const_iv (O_NONBLOCK)
		883	const_iv (O_EXEC)
		884	const_iv (O_SEARCH)
		885	const_iv (O_DIRECTORY)
		886	const_iv (O_DSYNC)
		887	const_iv (O_RSYNC)
		888	const_iv (O_SYNC)
		889	const_iv (O_TTY_INIT)
		890
		891	const_iv (S_IFIFO)
		892	const_iv (S_IFCHR)
		893	const_iv (S_IFBLK)
		894	const_iv (S_IFLNK)
		895	const_iv (S_IFREG)
		896	const_iv (S_IFDIR)
		897	const_iv (S_IFWHT)
		898	const_iv (S_IFSOCK)
		899	const_iv (S_IFMT)
		900
		901	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		902	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		903	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		904	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		905	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		906	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		907
		908	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		909	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		910	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		911	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		912	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		913
		914	const_iv (ST_RDONLY)
		915	const_iv (ST_NOSUID)
		916	const_iv (ST_NODEV)
		917	const_iv (ST_NOEXEC)
		918	const_iv (ST_SYNCHRONOUS)
		919	const_iv (ST_MANDLOCK)
		920	const_iv (ST_WRITE)
		921	const_iv (ST_APPEND)
		922	const_iv (ST_IMMUTABLE)
		923	const_iv (ST_NOATIME)
		924	const_iv (ST_NODIRATIME)
		925	const_iv (ST_RELATIME)
		926
		927	const_iv (PROT_NONE)
		928	const_iv (PROT_EXEC)
		929	const_iv (PROT_READ)
		930	const_iv (PROT_WRITE)
		931
		932	/*const_iv (MAP_FIXED)*/
		933	const_iv (MAP_PRIVATE)
		934	const_iv (MAP_SHARED)
		935	const_iv (MAP_ANONYMOUS)
		936
		937	/* linuxish */
		938	const_iv (MAP_HUGETLB)
		939	const_iv (MAP_LOCKED)
		940	const_iv (MAP_NORESERVE)
		941	const_iv (MAP_POPULATE)
		942	const_iv (MAP_NONBLOCK)
		943
		944	const_iv (FIEMAP_FLAG_SYNC)
		945	const_iv (FIEMAP_FLAG_XATTR)
		946	const_iv (FIEMAP_FLAGS_COMPAT)
		947	const_iv (FIEMAP_EXTENT_LAST)
		948	const_iv (FIEMAP_EXTENT_UNKNOWN)
		949	const_iv (FIEMAP_EXTENT_DELALLOC)
		950	const_iv (FIEMAP_EXTENT_ENCODED)
		951	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		952	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		953	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		954	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		955	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		956	const_iv (FIEMAP_EXTENT_MERGED)
		957	const_iv (FIEMAP_EXTENT_SHARED)
		958
		959	const_eio (SEEK_SET)
		960	const_eio (SEEK_CUR)
		961	const_eio (SEEK_END)
		962
		963	const_eio (MCL_FUTURE)
		964	const_eio (MCL_CURRENT)
		965
		966	const_eio (MS_ASYNC)
		967	const_eio (MS_INVALIDATE)
		968	const_eio (MS_SYNC)
		969
		970	const_eio (MT_MODIFY)
		971
		972	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		973	const_eio (SYNC_FILE_RANGE_WRITE)
		974	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		975
		976	const_eio (FALLOC_FL_KEEP_SIZE)
		977
		978	const_eio (READDIR_DENTS)
		979	const_eio (READDIR_DIRS_FIRST)
		980	const_eio (READDIR_STAT_ORDER)
		981	const_eio (READDIR_FOUND_UNKNOWN)
		982
		983	const_eio (DT_UNKNOWN)
		984	const_eio (DT_FIFO)
		985	const_eio (DT_CHR)
		986	const_eio (DT_DIR)
		987	const_eio (DT_BLK)
		988	const_eio (DT_REG)
		989	const_eio (DT_LNK)
		990	const_eio (DT_SOCK)
		991	const_eio (DT_WHT)
		992	};
		993
1182	HV *stash = gv_stashpv ("IO::AIO", 1);	994	aio_stash = gv_stashpv ("IO::AIO" , 1);
1183	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	995	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	996	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	997	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1186		998
1187	create_pipe ();	999	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1000	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1189		1001
1190	start_thread ();	1002	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1191	}
1192		1003
		1004	reinit ();
		1005	}
		1006
1193	void	1007	void
1194	min_parallel (int nthreads)	1008	reinit ()
1195	PROTOTYPE: $	1009	PROTOTYPE:
1196		1010
1197	void	1011	void
1198	max_parallel (int nthreads)	1012	max_poll_reqs (unsigned int nreqs)
1199	PROTOTYPE: $
1200
1201	int
1202	max_outstanding (int maxreqs)
1203	PROTOTYPE: $	1013	PROTOTYPE: $
1204	CODE:	1014	CODE:
1205	RETVAL = max_outstanding;	1015	eio_set_max_poll_reqs (nreqs);
		1016
		1017	void
		1018	max_poll_time (double nseconds)
		1019	PROTOTYPE: $
		1020	CODE:
		1021	eio_set_max_poll_time (nseconds);
		1022
		1023	void
		1024	min_parallel (unsigned int nthreads)
		1025	PROTOTYPE: $
		1026	CODE:
		1027	eio_set_min_parallel (nthreads);
		1028
		1029	void
		1030	max_parallel (unsigned int nthreads)
		1031	PROTOTYPE: $
		1032	CODE:
		1033	eio_set_max_parallel (nthreads);
		1034
		1035	void
		1036	max_idle (unsigned int nthreads)
		1037	PROTOTYPE: $
		1038	CODE:
		1039	eio_set_max_idle (nthreads);
		1040
		1041	void
		1042	idle_timeout (unsigned int seconds)
		1043	PROTOTYPE: $
		1044	CODE:
		1045	eio_set_idle_timeout (seconds);
		1046
		1047	void
		1048	max_outstanding (unsigned int maxreqs)
		1049	PROTOTYPE: $
		1050	CODE:
1206	max_outstanding = maxreqs;	1051	max_outstanding = maxreqs;
1207	OUTPUT:
1208	RETVAL
1209		1052
1210	void	1053	void
1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1054	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1212	SV * pathname
1213	int flags
1214	int mode
1215	SV * callback
1216	PROTOTYPE: $$$;$
1217	PPCODE:	1055	PPCODE:
1218	{	1056	{
1219	dREQ;	1057	dREQ;
1220		1058
1221	req->type = REQ_OPEN;	1059	req->type = EIO_WD_OPEN;
1222	req->data = newSVsv (pathname);	1060	req_set_path1 (req, pathname);
1223	req->dataptr = SvPVbyte_nolen (req->data);
1224	req->fd = flags;
1225	req->mode = mode;
1226		1061
1227	REQ_SEND;	1062	REQ_SEND;
1228	}	1063	}
1229		1064
1230	void	1065	void
		1066	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1067	PPCODE:
		1068	{
		1069	dREQ;
		1070
		1071	req->type = EIO_OPEN;
		1072	req_set_path1 (req, pathname);
		1073	req->int1 = flags;
		1074	req->int2 = mode;
		1075
		1076	REQ_SEND;
		1077	}
		1078
		1079	void
1231	aio_close (fh,callback=&PL_sv_undef)	1080	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1232	SV * fh
1233	SV * callback
1234	PROTOTYPE: $;$
1235	ALIAS:	1081	ALIAS:
1236	aio_close = REQ_CLOSE
1237	aio_fsync = REQ_FSYNC	1082	aio_fsync = EIO_FSYNC
1238	aio_fdatasync = REQ_FDATASYNC	1083	aio_fdatasync = EIO_FDATASYNC
		1084	aio_syncfs = EIO_SYNCFS
1239	PPCODE:	1085	PPCODE:
1240	{	1086	{
		1087	int fd = s_fileno_croak (fh, 0);
1241	dREQ;	1088	dREQ;
1242		1089
1243	req->type = ix;	1090	req->type = ix;
1244	req->fh = newSVsv (fh);	1091	req->sv1 = newSVsv (fh);
1245	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1092	req->int1 = fd;
1246		1093
1247	REQ_SEND (req);	1094	REQ_SEND;
1248	}	1095	}
1249		1096
1250	void	1097	void
		1098	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1099	PPCODE:
		1100	{
		1101	int fd = s_fileno_croak (fh, 0);
		1102	dREQ;
		1103
		1104	req->type = EIO_SYNC_FILE_RANGE;
		1105	req->sv1 = newSVsv (fh);
		1106	req->int1 = fd;
		1107	req->offs = offset;
		1108	req->size = nbytes;
		1109	req->int2 = flags;
		1110
		1111	REQ_SEND;
		1112	}
		1113
		1114	void
		1115	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1116	PPCODE:
		1117	{
		1118	int fd = s_fileno_croak (fh, 0);
		1119	dREQ;
		1120
		1121	req->type = EIO_FALLOCATE;
		1122	req->sv1 = newSVsv (fh);
		1123	req->int1 = fd;
		1124	req->int2 = mode;
		1125	req->offs = offset;
		1126	req->size = len;
		1127
		1128	REQ_SEND;
		1129	}
		1130
		1131	void
		1132	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1133	PPCODE:
		1134	{
		1135	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1136	int fd = s_fileno_croak (fh, 0);
		1137	dREQ;
		1138
		1139	if (expect_false (close_fd < 0))
		1140	{
		1141	int pipefd [2];
		1142
		1143	if (
		1144	#ifdef _WIN32
		1145	_pipe (pipefd, 1, _O_BINARY) < 0
		1146	#else
		1147	pipe (pipefd) < 0
		1148	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1149	#endif
		1150	|| close (pipefd [1]) < 0
		1151	)
		1152	abort (); /*D*/
		1153
		1154	close_fd = pipefd [0];
		1155	}
		1156
		1157	req->type = EIO_DUP2;
		1158	req->int1 = close_fd;
		1159	req->sv2 = newSVsv (fh);
		1160	req->int2 = fd;
		1161
		1162	REQ_SEND;
		1163	}
		1164
		1165	void
		1166	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1167	PPCODE:
		1168	{
		1169	STRLEN svlen;
		1170	int fd = s_fileno_croak (fh, 0);
		1171	dREQ;
		1172
		1173	req->type = EIO_SEEK;
		1174	req->sv1 = newSVsv (fh);
		1175	req->int1 = fd;
		1176	req->offs = SvVAL64 (offset);
		1177	req->int2 = whence;
		1178
		1179	REQ_SEND;
		1180	}
		1181
		1182	void
1251	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1183	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1252	SV * fh
1253	UV offset
1254	UV length
1255	SV * data
1256	UV dataoffset
1257	SV * callback
1258	ALIAS:	1184	ALIAS:
1259	aio_read = REQ_READ	1185	aio_read = EIO_READ
1260	aio_write = REQ_WRITE	1186	aio_write = EIO_WRITE
1261	PROTOTYPE: $$$$$;$
1262	PPCODE:	1187	PPCODE:
1263	{	1188	{
1264	aio_req req;
1265	STRLEN svlen;	1189	STRLEN svlen;
		1190	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1266	char *svptr = SvPVbyte (data, svlen);	1191	char *svptr = SvPVbyte (data, svlen);
1267		1192	UV len = SvUV (length);
1268	SvUPGRADE (data, SVt_PV);
1269	SvPOK_on (data);
1270		1193
1271	if (dataoffset < 0)	1194	if (dataoffset < 0)
1272	dataoffset += svlen;	1195	dataoffset += svlen;
1273		1196
1274	if (dataoffset < 0 || dataoffset > svlen)	1197	if (dataoffset < 0 || dataoffset > svlen)
1275	croak ("data offset outside of string");	1198	croak ("dataoffset outside of data scalar");
1276		1199
1277	if (ix == REQ_WRITE)	1200	if (ix == EIO_WRITE)
1278	{	1201	{
1279	/* write: check length and adjust. */	1202	/* write: check length and adjust. */
1280	if (length < 0 || length + dataoffset > svlen)	1203	if (!SvOK (length) || len + dataoffset > svlen)
1281	length = svlen - dataoffset;	1204	len = svlen - dataoffset;
1282	}	1205	}
1283	else	1206	else
1284	{	1207	{
1285	/* read: grow scalar as necessary */	1208	/* read: check type and grow scalar as necessary */
		1209	SvUPGRADE (data, SVt_PV);
1286	svptr = SvGROW (data, length + dataoffset);	1210	svptr = SvGROW (data, len + dataoffset + 1);
1287	}	1211	}
1288
1289	if (length < 0)
1290	croak ("length must not be negative");
1291		1212
1292	{	1213	{
1293	dREQ;	1214	dREQ;
1294		1215
1295	req->type = ix;	1216	req->type = ix;
1296	req->fh = newSVsv (fh);	1217	req->sv1 = newSVsv (fh);
1297	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1218	req->int1 = fd;
1298	: IoOFP (sv_2io (fh)));	1219	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1299	req->offset = offset;	1220	req->size = len;
1300	req->length = length;
1301	req->data = SvREFCNT_inc (data);	1221	req->sv2 = SvREFCNT_inc (data);
1302	req->dataptr = (char *)svptr + dataoffset;	1222	req->ptr2 = (char *)svptr + dataoffset;
		1223	req->stroffset = dataoffset;
1303		1224
1304	if (!SvREADONLY (data))	1225	if (!SvREADONLY (data))
1305	{	1226	{
1306	SvREADONLY_on (data);	1227	SvREADONLY_on (data);
1307	req->data2ptr = (void *)data;	1228	req->flags |= FLAG_SV2_RO_OFF;
1308	}	1229	}
1309		1230
1310	REQ_SEND;	1231	REQ_SEND;
1311	}	1232	}
1312	}	1233	}
1313		1234
1314	void	1235	void
1315	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1236	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1316	SV * out_fh	1237	ALIAS:
1317	SV * in_fh	1238	aio_readlink = EIO_READLINK
1318	UV in_offset	1239	aio_realpath = EIO_REALPATH
1319	UV length
1320	SV * callback
1321	PROTOTYPE: $$$$;$
1322	PPCODE:	1240	PPCODE:
1323	{	1241	{
		1242	dREQ;
		1243
		1244	req->type = ix;
		1245	req_set_path1 (req, pathname);
		1246
		1247	REQ_SEND;
		1248	}
		1249
		1250	void
		1251	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1252	PPCODE:
		1253	{
		1254	int ifd = s_fileno_croak (in_fh , 0);
		1255	int ofd = s_fileno_croak (out_fh, 1);
1324	dREQ;	1256	dREQ;
1325		1257
1326	req->type = REQ_SENDFILE;	1258	req->type = EIO_SENDFILE;
1327	req->fh = newSVsv (out_fh);	1259	req->sv1 = newSVsv (out_fh);
1328	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1260	req->int1 = ofd;
1329	req->fh2 = newSVsv (in_fh);	1261	req->sv2 = newSVsv (in_fh);
1330	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1262	req->int2 = ifd;
1331	req->offset = in_offset;	1263	req->offs = in_offset;
1332	req->length = length;	1264	req->size = length;
1333		1265
1334	REQ_SEND;	1266	REQ_SEND;
1335	}	1267	}
1336		1268
1337	void	1269	void
1338	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1270	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1339	SV * fh
1340	UV offset
1341	IV length
1342	SV * callback
1343	PROTOTYPE: $$$;$
1344	PPCODE:	1271	PPCODE:
1345	{	1272	{
		1273	int fd = s_fileno_croak (fh, 0);
1346	dREQ;	1274	dREQ;
1347		1275
1348	req->type = REQ_READAHEAD;	1276	req->type = EIO_READAHEAD;
1349	req->fh = newSVsv (fh);	1277	req->sv1 = newSVsv (fh);
1350	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1278	req->int1 = fd;
1351	req->offset = offset;	1279	req->offs = offset;
1352	req->length = length;	1280	req->size = length;
1353		1281
1354	REQ_SEND;	1282	REQ_SEND;
1355	}	1283	}
1356		1284
1357	void	1285	void
1358	aio_stat (fh_or_path,callback=&PL_sv_undef)	1286	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1359	SV * fh_or_path
1360	SV * callback
1361	ALIAS:	1287	ALIAS:
1362	aio_stat = REQ_STAT	1288	aio_stat = EIO_STAT
1363	aio_lstat = REQ_LSTAT	1289	aio_lstat = EIO_LSTAT
		1290	aio_statvfs = EIO_STATVFS
1364	PPCODE:	1291	PPCODE:
1365	{	1292	{
1366	dREQ;	1293	dREQ;
1367		1294
1368	New (0, req->statdata, 1, Stat_t);	1295	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1369	if (!req->statdata)
1370	{
1371	req_free (req);
1372	croak ("out of memory during aio_req->statdata allocation");
1373	}
1374
1375	if (SvPOK (fh_or_path))
1376	{
1377	req->type = ix;
1378	req->data = newSVsv (fh_or_path);
1379	req->dataptr = SvPVbyte_nolen (req->data);
1380	}
1381	else
1382	{
1383	req->type = REQ_FSTAT;
1384	req->fh = newSVsv (fh_or_path);
1385	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386	}
1387		1296
1388	REQ_SEND;	1297	REQ_SEND;
1389	}	1298	}
1390		1299
		1300	UV
		1301	major (UV dev)
		1302	ALIAS:
		1303	minor = 1
		1304	CODE:
		1305	RETVAL = ix ? major (dev) : minor (dev);
		1306	OUTPUT:
		1307	RETVAL
		1308
		1309	UV
		1310	makedev (UV maj, UV min)
		1311	CODE:
		1312	RETVAL = makedev (maj, min);
		1313	OUTPUT:
		1314	RETVAL
		1315
1391	void	1316	void
		1317	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1318	PPCODE:
		1319	{
		1320	dREQ;
		1321
		1322	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1323	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1324	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1325
		1326	REQ_SEND;
		1327	}
		1328
		1329	void
		1330	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1331	PPCODE:
		1332	{
		1333	dREQ;
		1334
		1335	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1336	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1337
		1338	REQ_SEND;
		1339	}
		1340
		1341	void
		1342	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1343	PPCODE:
		1344	{
		1345	dREQ;
		1346
		1347	req->int2 = mode;
		1348	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1355	PPCODE:
		1356	{
		1357	dREQ;
		1358
		1359	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1360	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1361	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1362
		1363	REQ_SEND;
		1364	}
		1365
		1366	void
		1367	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1368	PPCODE:
		1369	{
		1370	dREQ;
		1371
		1372	req->type = EIO_READDIR;
		1373	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1374
		1375	if (flags & EIO_READDIR_DENTS)
		1376	req->int1 |= EIO_READDIR_CUSTOM2;
		1377
		1378	req_set_path1 (req, pathname);
		1379
		1380	REQ_SEND;
		1381	}
		1382
		1383	void
		1384	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1385	PPCODE:
		1386	{
		1387	dREQ;
		1388
		1389	req->type = EIO_MKDIR;
		1390	req->int2 = mode;
		1391	req_set_path1 (req, pathname);
		1392
		1393	REQ_SEND;
		1394	}
		1395
		1396	void
1392	aio_unlink (pathname,callback=&PL_sv_undef)	1397	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1393	SV * pathname
1394	SV * callback
1395	ALIAS:	1398	ALIAS:
1396	aio_unlink = REQ_UNLINK	1399	aio_unlink = EIO_UNLINK
1397	aio_rmdir = REQ_RMDIR	1400	aio_rmdir = EIO_RMDIR
1398	aio_readdir = REQ_READDIR	1401	aio_readdir = EIO_READDIR
1399	PPCODE:	1402	PPCODE:
1400	{	1403	{
1401	dREQ;	1404	dREQ;
1402		1405
1403	req->type = ix;	1406	req->type = ix;
1404	req->data = newSVsv (pathname);	1407	req_set_path1 (req, pathname);
1405	req->dataptr = SvPVbyte_nolen (req->data);	1408
1406
1407	REQ_SEND;	1409	REQ_SEND;
1408	}	1410	}
1409		1411
1410	void	1412	void
1411	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1413	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1412	SV * oldpath
1413	SV * newpath
1414	SV * callback
1415	ALIAS:	1414	ALIAS:
1416	aio_link = REQ_LINK	1415	aio_link = EIO_LINK
1417	aio_symlink = REQ_SYMLINK	1416	aio_symlink = EIO_SYMLINK
1418	aio_rename = REQ_RENAME	1417	aio_rename = EIO_RENAME
1419	PPCODE:	1418	PPCODE:
1420	{	1419	{
		1420	eio_wd wd2 = 0;
1421	dREQ;	1421	dREQ;
1422		1422
1423	req->type = ix;	1423	req->type = ix;
1424	req->fh = newSVsv (oldpath);	1424	req_set_path1 (req, oldpath);
1425	req->data2ptr = SvPVbyte_nolen (req->fh);	1425	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1426	req->data = newSVsv (newpath);	1426	req->int3 = (long)wd2;
1427	req->dataptr = SvPVbyte_nolen (req->data);
1428		1427
1429	REQ_SEND;	1428	REQ_SEND;
1430	}	1429	}
1431		1430
1432	void	1431	void
1433	aio_busy (delay,callback=&PL_sv_undef)	1432	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1434	double delay
1435	SV * callback
1436	PPCODE:	1433	PPCODE:
1437	{	1434	{
1438	dREQ;	1435	dREQ;
1439		1436
1440	req->type = REQ_BUSY;	1437	req->type = EIO_MKNOD;
1441	req->fd = delay < 0. ? 0 : delay;	1438	req->int2 = (mode_t)mode;
1442	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1439	req->offs = dev;
1443		1440	req_set_path1 (req, pathname);
		1441
1444	REQ_SEND;	1442	REQ_SEND;
1445	}	1443	}
1446		1444
1447	void	1445	void
1448	aio_group (callback=&PL_sv_undef)	1446	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1449	SV * callback	1447	ALIAS:
1450	PROTOTYPE: ;$	1448	aio_mtouch = EIO_MTOUCH
		1449	aio_msync = EIO_MSYNC
1451	PPCODE:	1450	PPCODE:
1452	{	1451	{
		1452	STRLEN svlen;
		1453	char *svptr = SvPVbyte (data, svlen);
		1454	UV len = SvUV (length);
		1455
		1456	if (offset < 0)
		1457	offset += svlen;
		1458
		1459	if (offset < 0 || offset > svlen)
		1460	croak ("offset outside of scalar");
		1461
		1462	if (!SvOK (length) || len + offset > svlen)
		1463	len = svlen - offset;
		1464
		1465	{
		1466	dREQ;
		1467
		1468	req->type = ix;
		1469	req->sv2 = SvREFCNT_inc (data);
		1470	req->ptr2 = (char *)svptr + offset;
		1471	req->size = len;
		1472	req->int1 = flags;
		1473
		1474	REQ_SEND;
		1475	}
		1476	}
		1477
		1478	void
		1479	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1480	PPCODE:
		1481	{
		1482	STRLEN svlen;
		1483	char *svptr = SvPVbyte (data, svlen);
		1484	UV len = SvUV (length);
		1485
		1486	if (offset < 0)
		1487	offset += svlen;
		1488
		1489	if (offset < 0 || offset > svlen)
		1490	croak ("offset outside of scalar");
		1491
		1492	if (!SvOK (length) || len + offset > svlen)
		1493	len = svlen - offset;
		1494
		1495	{
		1496	dREQ;
		1497
		1498	req->type = EIO_MLOCK;
		1499	req->sv2 = SvREFCNT_inc (data);
		1500	req->ptr2 = (char *)svptr + offset;
		1501	req->size = len;
		1502
		1503	REQ_SEND;
		1504	}
		1505	}
		1506
		1507	void
		1508	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1509	PPCODE:
		1510	{
		1511	dREQ;
		1512
		1513	req->type = EIO_MLOCKALL;
		1514	req->int1 = flags;
		1515
		1516	REQ_SEND;
		1517	}
		1518
		1519	void
		1520	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1521	PPCODE:
		1522	{
		1523	int fd = s_fileno_croak (fh, 0);
1453	dREQ;	1524	dREQ;
1454		1525
1455	req->type = REQ_GROUP;	1526	req->type = EIO_CUSTOM;
1456	req_send (req);	1527	req->sv1 = newSVsv (fh);
		1528	req->int1 = fd;
1457		1529
1458	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1530	req->feed = fiemap;
1459	}	1531	/* keep our fingers crossed that the next two types are 64 bit */
		1532	req->offs = start;
		1533	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1534	req->int2 = flags;
		1535	req->int3 = SvOK (count) ? SvIV (count) : -1;
1460		1536
		1537	REQ_SEND;
		1538	}
		1539
1461	void	1540	void
1462	aio_nop (callback=&PL_sv_undef)	1541	aio_busy (double delay, SV *callback=&PL_sv_undef)
1463	SV * callback
1464	PPCODE:	1542	PPCODE:
1465	{	1543	{
1466	dREQ;	1544	dREQ;
1467		1545
		1546	req->type = EIO_BUSY;
		1547	req->nv1 = delay < 0. ? 0. : delay;
		1548
		1549	REQ_SEND;
		1550	}
		1551
		1552	void
		1553	aio_group (SV *callback=&PL_sv_undef)
		1554	PPCODE:
		1555	{
		1556	dREQ;
		1557
1468	req->type = REQ_NOP;	1558	req->type = EIO_GROUP;
		1559
		1560	req_submit (req);
		1561	XPUSHs (req_sv (req, aio_grp_stash));
		1562	}
		1563
		1564	void
		1565	aio_nop (SV *callback=&PL_sv_undef)
		1566	ALIAS:
		1567	aio_nop = EIO_NOP
		1568	aio_sync = EIO_SYNC
		1569	PPCODE:
		1570	{
		1571	dREQ;
		1572
		1573	req->type = ix;
1469		1574
1470	REQ_SEND;	1575	REQ_SEND;
1471	}	1576	}
1472		1577
1473	int	1578	int
1474	aioreq_pri (int pri = 0)	1579	aioreq_pri (int pri = 0)
1475	PROTOTYPE: ;$
1476	CODE:	1580	CODE:
1477	RETVAL = next_pri - PRI_BIAS;	1581	RETVAL = next_pri;
1478	if (items > 0)	1582	if (items > 0)
1479	{	1583	{
1480	if (pri < PRI_MIN) pri = PRI_MIN;	1584	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1481	if (pri > PRI_MAX) pri = PRI_MAX;	1585	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1482	next_pri = pri + PRI_BIAS;	1586	next_pri = pri;
1483	}	1587	}
1484	OUTPUT:	1588	OUTPUT:
1485	RETVAL	1589	RETVAL
1486		1590
1487	void	1591	void
1488	aioreq_nice (int nice = 0)	1592	aioreq_nice (int nice = 0)
1489	CODE:	1593	CODE:
1490	nice = next_pri - nice;	1594	nice = next_pri - nice;
1491	if (nice < PRI_MIN) nice = PRI_MIN;	1595	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1492	if (nice > PRI_MAX) nice = PRI_MAX;	1596	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1493	next_pri = nice + PRI_BIAS;	1597	next_pri = nice;
1494		1598
1495	void	1599	void
1496	flush ()	1600	flush ()
		1601	CODE:
		1602	while (eio_nreqs ())
		1603	{
		1604	poll_wait ();
		1605	poll_cb ();
		1606	}
		1607
		1608	int
		1609	poll ()
		1610	CODE:
		1611	poll_wait ();
		1612	RETVAL = poll_cb ();
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
		1617	poll_fileno ()
		1618	CODE:
		1619	RETVAL = s_epipe_fd (&respipe);
		1620	OUTPUT:
		1621	RETVAL
		1622
		1623	int
		1624	poll_cb (...)
1497	PROTOTYPE:	1625	PROTOTYPE:
1498	CODE:	1626	CODE:
1499	while (nreqs)
1500	{
1501	poll_wait ();
1502	poll_cb (0);	1627	RETVAL = poll_cb ();
1503	}
1504
1505	void
1506	poll()
1507	PROTOTYPE:
1508	CODE:
1509	if (nreqs)
1510	{
1511	poll_wait ();
1512	poll_cb (0);
1513	}
1514
1515	int
1516	poll_fileno()
1517	PROTOTYPE:
1518	CODE:
1519	RETVAL = respipe [0];
1520	OUTPUT:	1628	OUTPUT:
1521	RETVAL	1629	RETVAL
1522		1630
		1631	void
		1632	poll_wait ()
		1633	CODE:
		1634	poll_wait ();
		1635
1523	int	1636	int
1524	poll_cb(...)	1637	nreqs ()
1525	PROTOTYPE:
1526	CODE:	1638	CODE:
1527	RETVAL = poll_cb (0);	1639	RETVAL = eio_nreqs ();
1528	OUTPUT:	1640	OUTPUT:
1529	RETVAL	1641	RETVAL
1530		1642
1531	int	1643	int
1532	poll_some(int max = 0)	1644	nready ()
1533	PROTOTYPE: $
1534	CODE:	1645	CODE:
1535	RETVAL = poll_cb (max);	1646	RETVAL = eio_nready ();
1536	OUTPUT:	1647	OUTPUT:
1537	RETVAL	1648	RETVAL
1538		1649
1539	void	1650	int
1540	poll_wait()	1651	npending ()
1541	PROTOTYPE:
1542	CODE:	1652	CODE:
1543	if (nreqs)	1653	RETVAL = eio_npending ();
1544	poll_wait ();
1545
1546	int
1547	nreqs()
1548	PROTOTYPE:
1549	CODE:
1550	RETVAL = nreqs;
1551	OUTPUT:	1654	OUTPUT:
1552	RETVAL	1655	RETVAL
1553		1656
1554	int	1657	int
1555	nready()	1658	nthreads ()
1556	PROTOTYPE:
1557	CODE:	1659	CODE:
1558	RETVAL = get_nready ();	1660	RETVAL = eio_nthreads ();
1559	OUTPUT:	1661	OUTPUT:
1560	RETVAL	1662	RETVAL
1561		1663
1562	int	1664	int
1563	npending()	1665	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1564	PROTOTYPE:	1666	CODE:
		1667	RETVAL = posix_fadvise (fh, offset, length, advice);
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	IV
		1672	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1673	CODE:
		1674	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1675	OUTPUT:
		1676	RETVAL
		1677
		1678	void
		1679	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1680	PPCODE:
		1681	sv_unmagic (scalar, MMAP_MAGIC);
		1682	{
		1683	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1684	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1685	if (addr == (void *)-1)
		1686	XSRETURN_NO;
		1687
		1688	sv_force_normal (scalar);
		1689
		1690	/* we store the length in mg_obj, as namlen is I32 :/ */
		1691	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1692	->mg_obj = (SV *)length;
		1693
		1694	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1695
		1696	if (!(prot & PROT_WRITE))
		1697	SvREADONLY_on (scalar);
		1698
		1699	if (SvLEN (scalar))
		1700	Safefree (SvPVX (scalar));
		1701
		1702	SvPVX (scalar) = (char *)addr;
		1703	SvCUR_set (scalar, length);
		1704	SvLEN_set (scalar, 0);
		1705	SvPOK_only (scalar);
		1706
		1707	XSRETURN_YES;
		1708	}
		1709
		1710	void
		1711	munmap (SV *scalar)
1565	CODE:	1712	CODE:
1566	RETVAL = get_npending ();	1713	sv_unmagic (scalar, MMAP_MAGIC);
		1714
		1715	int
		1716	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1717	ALIAS:
		1718	mprotect = 1
		1719	CODE:
		1720	{
		1721	STRLEN svlen;
		1722	void *addr = SvPVbyte (scalar, svlen);
		1723	size_t len = SvUV (length);
		1724
		1725	if (offset < 0)
		1726	offset += svlen;
		1727
		1728	if (offset < 0 || offset > svlen)
		1729	croak ("offset outside of scalar");
		1730
		1731	if (!SvOK (length) || len + offset > svlen)
		1732	len = svlen - offset;
		1733
		1734	addr = (void *)(((intptr_t)addr) + offset);
		1735	eio_page_align (&addr, &len);
		1736
		1737	switch (ix)
		1738	{
		1739	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1740	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1741	}
		1742	}
1567	OUTPUT:	1743	OUTPUT:
1568	RETVAL	1744	RETVAL
		1745
		1746	int
		1747	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1748	CODE:
		1749	{
		1750	STRLEN svlen;
		1751	void *addr = SvPVbyte (scalar, svlen);
		1752	size_t len = SvUV (length);
		1753
		1754	if (offset < 0)
		1755	offset += svlen;
		1756
		1757	if (offset < 0 || offset > svlen)
		1758	croak ("offset outside of scalar");
		1759
		1760	if (!SvOK (length) || len + offset > svlen)
		1761	len = svlen - offset;
		1762
		1763	addr = (void *)(((intptr_t)addr) + offset);
		1764	eio_page_align (&addr, &len);
		1765	#if _POSIX_MEMLOCK_RANGE
		1766	RETVAL = munlock (addr, len);
		1767	#else
		1768	RETVAL = ((errno = ENOSYS), -1);
		1769	#endif
		1770	}
		1771	OUTPUT:
		1772	RETVAL
		1773
		1774	int
		1775	munlockall ()
		1776	CODE:
		1777	#if _POSIX_MEMLOCK
		1778	munlockall ();
		1779	#else
		1780	RETVAL = -1;
		1781	errno = ENOSYS;
		1782	#endif
		1783	OUTPUT:
		1784	RETVAL
		1785
		1786	void _on_next_submit (SV *cb)
		1787	CODE:
		1788	SvREFCNT_dec (on_next_submit);
		1789	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1569		1790
1570	PROTOTYPES: DISABLE	1791	PROTOTYPES: DISABLE
		1792
		1793	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1794
		1795	BOOT:
		1796	{
		1797	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1798	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1799	}
		1800
		1801	void
		1802	DESTROY (SV *self)
		1803	CODE:
		1804	{
		1805	aio_wd wd = SvAIO_WD (self);
		1806	#if HAVE_AT
		1807	{
		1808	SV *callback = &PL_sv_undef;
		1809	dREQ; /* clobbers next_pri :/ */
		1810	next_pri = req->pri; /* restore next_pri */
		1811	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1812	req->type = EIO_WD_CLOSE;
		1813	req->wd = wd;
		1814	REQ_SEND;
		1815	}
		1816	#else
		1817	eio_wd_close_sync (wd);
		1818	#endif
		1819	}
1571		1820
1572	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1821	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1573		1822
1574	void	1823	void
1575	cancel (aio_req_ornot req)	1824	cancel (aio_req_ornot req)
1576	CODE:	1825	CODE:
1577	req_cancel (req);	1826	eio_cancel (req);
1578		1827
1579	void	1828	void
1580	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1829	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1581	CODE:	1830	PPCODE:
		1831	{
		1832	if (GIMME_V != G_VOID)
		1833	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1834
		1835	if (items > 1)
		1836	{
		1837	SV *cb_cv =get_cb (callback);
		1838
1582	SvREFCNT_dec (req->callback);	1839	SvREFCNT_dec (req->callback);
1583	req->callback = newSVsv (callback);	1840	req->callback = SvREFCNT_inc (cb_cv);
		1841	}
		1842	}
1584		1843
1585	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1844	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1586		1845
1587	void	1846	void
1588	add (aio_req grp, ...)	1847	add (aio_req grp, ...)
1589	PPCODE:	1848	PPCODE:
1590	{	1849	{
1591	int i;	1850	int i;
1592	aio_req req;
1593		1851
1594	if (grp->fd == 2)	1852	if (grp->int1 == 2)
1595	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1853	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1596		1854
1597	for (i = 1; i < items; ++i )	1855	for (i = 1; i < items; ++i )
1598	{	1856	{
		1857	aio_req req;
		1858
1599	if (GIMME_V != G_VOID)	1859	if (GIMME_V != G_VOID)
1600	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1860	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1601		1861
1602	req = SvAIO_REQ (ST (i));	1862	req = SvAIO_REQ (ST (i));
1603		1863
1604	if (req)	1864	if (req)
1605	{	1865	eio_grp_add (grp, req);
1606	++grp->length;
1607	req->grp = grp;
1608
1609	req->grp_prev = 0;
1610	req->grp_next = grp->grp_first;
1611
1612	if (grp->grp_first)
1613	grp->grp_first->grp_prev = req;
1614
1615	grp->grp_first = req;
1616	}
1617	}	1866	}
1618	}	1867	}
1619		1868
1620	void	1869	void
1621	cancel_subs (aio_req_ornot req)	1870	cancel_subs (aio_req_ornot req)
…		…
1630	AV *av;	1879	AV *av;
1631		1880
1632	grp->errorno = errno;	1881	grp->errorno = errno;
1633		1882
1634	av = newAV ();	1883	av = newAV ();
		1884	av_extend (av, items - 1);
1635		1885
1636	for (i = 1; i < items; ++i )	1886	for (i = 1; i < items; ++i )
1637	av_push (av, newSVsv (ST (i)));	1887	av_push (av, newSVsv (ST (i)));
1638		1888
1639	SvREFCNT_dec (grp->data);	1889	SvREFCNT_dec (grp->sv1);
1640	grp->data = (SV *)av;	1890	grp->sv1 = (SV *)av;
1641	}	1891	}
1642		1892
1643	void	1893	void
1644	errno (aio_req grp, int errorno = errno)	1894	errno (aio_req grp, int errorno = errno)
1645	CODE:	1895	CODE:
1646	grp->errorno = errorno;	1896	grp->errorno = errorno;
1647		1897
1648	void	1898	void
1649	limit (aio_req grp, int limit)	1899	limit (aio_req grp, int limit)
1650	CODE:	1900	CODE:
1651	grp->fd2 = limit;	1901	eio_grp_limit (grp, limit);
1652	aio_grp_feed (grp);
1653		1902
1654	void	1903	void
1655	feed (aio_req grp, SV *callback=&PL_sv_undef)	1904	feed (aio_req grp, SV *callback=&PL_sv_undef)
1656	CODE:	1905	CODE:
1657	{	1906	{
1658	SvREFCNT_dec (grp->fh2);	1907	SvREFCNT_dec (grp->sv2);
1659	grp->fh2 = newSVsv (callback);	1908	grp->sv2 = newSVsv (callback);
		1909	grp->feed = aio_grp_feed;
1660		1910
1661	if (grp->fd2 <= 0)	1911	if (grp->int2 <= 0)
1662	grp->fd2 = 2;	1912	grp->int2 = 2;
1663		1913
1664	aio_grp_feed (grp);	1914	eio_grp_limit (grp, grp->int2);
1665	}	1915	}
1666		1916

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