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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC vs.
Revision 1.166 by root, Sun May 9 20:43:28 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
26	#include <limits.h>	17	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	18	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	19	#include <sched.h>
31		20
32	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>	22	# include <sys/mman.h>
35	# elif __freebsd	23	#endif
36	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
37	# include <sys/uio.h>	68	# include <sys/time.h>
38	# elif __hpux
39	# include <sys/socket.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
42	# else	186	# else
43	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	188	# endif
45	#endif	189	#endif
46		190	#ifndef MAP_HUGETLB
47	/* used for struct dirent, AIX doesn't provide it */	191	# define MAP_HUGETLB 0
48	#ifndef NAME_MAX
49	# define NAME_MAX 4096
50	#endif	192	#endif
51		193	#ifndef MAP_LOCKED
52	#if __ia64	194	# define MAP_LOCKED 0
53	# define STACKSIZE 65536
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
59		205
60	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
61	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
62		209
63	#define dBUF \	210	static int req_invoke (eio_req *req);
64	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
65	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
67	UNLOCK (wrklock); \
68	if (!aio_buf) \
69	return -1;
70		214
71	enum {	215	enum {
72	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};	217	};
84		218
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		220
88	typedef struct aio_cb
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;
93	SV *fh, *fh2;
94	void *dataptr, *data2ptr;
95	Stat_t *statdata;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99
100	STRLEN dataoffset;
101	int type;
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105
106	unsigned char flags;
107	unsigned char pri;
108
109	SV *self; /* the perl counterpart of this request, if any */
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
111	} aio_cb;
112
113	enum {
114	FLAG_CANCELLED = 0x01,
115	};
116
117	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
119		223
120	enum {	224	static SV *on_next_submit;
121	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
122	PRI_MAX = 4,	226	static int max_outstanding;
123		227
124	DEFAULT_PRI = 0,	228	static s_epipe respipe;
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128		229
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{
165	closedir (wrk->dirp);
166	wrk->dirp = 0;
167	}
168
169	if (wrk->dbuf)
170	{
171	free (wrk->dbuf);
172	wrk->dbuf = 0;
173	}
174	}
175
176	static void worker_free (worker *wrk)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;
223
224	--q->size;
225
226	for (pri = NUM_PRI; pri--; )
227	{
228	aio_req req = q->qs[pri];
229
230	if (req)
231	{
232	if (!(q->qs[pri] = req->next))
233	q->qe[pri] = 0;
234
235	return req;
236	}
237	}
238
239	abort ();
240	}
241
242	static int poll_cb ();
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	230	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
246		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
247	/* must be called at most once */	245	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
249	{	247	{
250	if (!req->self)	248	if (!req->self)
251	{	249	{
252	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254	}	252	}
255		253
256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
257	}	255	}
258		256
259	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
260	{	258	{
261	MAGIC *mg;	259	MAGIC *mg;
262		260
263	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
264	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
265		266
266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267		268
268	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	270	}
270		271
271	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
272	{	273	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
274	{	275	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	276	dSP;
280		277
281	ENTER;	278	ENTER;
282	SAVETMPS;	279	SAVETMPS;
283	PUSHMARK (SP);	280	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
285	PUTBACK;	282	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	284	SPAGAIN;
288	FREETMPS;	285	FREETMPS;
289	LEAVE;	286	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	}	287	}
300	}	288	}
301		289
302	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
303	{	291	{
304	--grp->length;	292	eio_submit (req);
305		293
306	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	295	{
312	req_invoke (grp);	296	dSP;
313	req_free (grp);	297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
314	}	304	}
315	}	305	}
316		306
317	static void poll_wait ()	307	static int req_invoke (eio_req *req)
318	{	308	{
319	fd_set rfd;	309	if (req->flags & FLAG_SV2_RO_OFF)
		310	SvREADONLY_off (req->sv2);
320		311
321	while (nreqs)	312	if (!EIO_CANCELLED (req) && req->callback)
322	{	313	{
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;	314	dSP;
345		315	static SV *sv_result_cache; /* caches the result integer SV */
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	316	SV *sv_result;
347	{
348	errno = req->errorno;
349		317
350	ENTER;	318	ENTER;
351	SAVETMPS;	319	SAVETMPS;
352	PUSHMARK (SP);	320	PUSHMARK (SP);
353	EXTEND (SP, 1);	321	EXTEND (SP, 1);
354		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
		325	{
		326	sv_result = sv_result_cache; sv_result_cache = 0;
		327	SvIV_set (sv_result, req->result);
		328	}
		329	else
		330	{
		331	sv_result = newSViv (req->result);
		332	SvREADONLY_on (sv_result);
		333	}
		334
355	switch (req->type)	335	switch (req->type)
356	{	336	{
357	case REQ_READDIR:	337	case EIO_READDIR:
358	{	338	{
359	SV *rv = &PL_sv_undef;	339	SV *rv = &PL_sv_undef;
360		340
361	if (req->result >= 0)	341	if (req->result >= 0)
362	{	342	{
363	int i;	343	int i;
364	char *buf = req->data2ptr;	344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
365	AV *av = newAV ();	346	AV *av = newAV ();
366		347
367	av_extend (av, req->result - 1);	348	av_extend (av, req->result - 1);
368		349
369	for (i = 0; i < req->result; ++i)	350	for (i = 0; i < req->result; ++i)
370	{	351	{
371	SV *sv = newSVpv (buf, 0);	352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
372		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
373	av_store (av, i, sv);	376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
374	buf += SvCUR (sv) + 1;	384	names += SvCUR (name) + 1;
		385	}
375	}	386	}
376		387
377	rv = sv_2mortal (newRV_noinc ((SV *)av));	388	rv = sv_2mortal (newRV_noinc ((SV *)av));
378	}	389	}
379		390
380	PUSHs (rv);	391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
381	}	395	}
382	break;	396	break;
383		397
384	case REQ_OPEN:	398	case EIO_OPEN:
385	{	399	{
386	/* convert fd to fh */	400	/* convert fd to fh */
387	SV *fh;	401	SV *fh = &PL_sv_undef;
388		402
389	PUSHs (sv_2mortal (newSViv (req->result)));	403	if (req->result >= 0)
390	PUTBACK;	404	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	405	GV *gv = (GV *)sv_newmortal ();
392	SPAGAIN;	406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
393		412
394	fh = SvREFCNT_inc (POPs);	413	symlen = snprintf (
		414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
395		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
396	PUSHMARK (SP);	425	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	426	}
399	break;	427	break;
400		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
401	case REQ_GROUP:	459	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	460	req->int1 = 2; /* mark group as finished */
403		461
404	if (req->data)	462	if (req->sv1)
405	{	463	{
406	int i;	464	int i;
407	AV *av = (AV *)req->data;	465	AV *av = (AV *)req->sv1;
408		466
409	EXTEND (SP, AvFILL (av) + 1);	467	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	468	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	469	PUSHs (*av_fetch (av, i, 0));
412	}	470	}
413	break;	471	break;
414		472
415	case REQ_NOP:	473	case EIO_NOP:
416	case REQ_BUSY:	474	case EIO_BUSY:
417	break;	475	break;
418		476
		477	case EIO_READLINK:
		478	if (req->result > 0)
		479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		480	break;
		481
		482	case EIO_STAT:
		483	case EIO_LSTAT:
		484	case EIO_FSTAT:
		485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		486	PL_laststatval = req->result;
		487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		488	PUSHs (sv_result);
		489	break;
		490
		491	case EIO_READ:
		492	{
		493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		494	*SvEND (req->sv2) = 0;
		495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
		499	break;
		500
		501	case EIO_DUP2:
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
419	default:	506	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	507	PUSHs (sv_result);
421	break;	508	break;
422	}	509	}
423		510
		511	errno = req->errorno;
424		512
425	PUTBACK;	513	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
428		521
429	FREETMPS;	522	FREETMPS;
430	LEAVE;	523	LEAVE;
		524
		525	PUTBACK;
431	}	526	}
432		527
433	if (req->grp)	528	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	}	529	}
453		530
454	static void req_free (aio_req req)	531	static void req_destroy (aio_req req)
455	{	532	{
456	if (req->self)	533	if (req->self)
457	{	534	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
460	}	537	}
461		538
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	539	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	540	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	541	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		542
471	Safefree (req);	543	Safefree (req);
472	}	544	}
473		545
474	static void req_cancel_subs (aio_req grp)	546	static void req_cancel_subs (aio_req grp)
475	{	547	{
476	aio_req sub;	548	aio_req sub;
477		549
478	if (grp->type != REQ_GROUP)	550	if (grp->type != EIO_GROUP)
479	return;	551	return;
480		552
481	SvREFCNT_dec (grp->fh2);	553	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	554	grp->sv2 = 0;
483		555
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	556	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	557	}
487		558
488	static void req_cancel (aio_req req)	559	static void
		560	create_respipe (void)
489	{	561	{
490	req->flags |= FLAG_CANCELLED;	562	if (s_epipe_renew (&respipe))
491		563	croak ("IO::AIO: unable to initialize result pipe");
492	req_cancel_subs (req);
493	}	564	}
494		565
		566	static void poll_wait (void)
		567	{
		568	while (eio_nreqs ())
		569	{
		570	int size;
		571
		572	X_LOCK (reslock);
		573	size = res_queue.size;
		574	X_UNLOCK (reslock);
		575
		576	if (size)
		577	return;
		578
		579	etp_maybe_start_thread ();
		580
		581	s_epipe_wait (&respipe);
		582	}
		583	}
		584
495	static int poll_cb ()	585	static int poll_cb (void)
496	{	586	{
497	dSP;
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501
502	for (;;)	587	for (;;)
503	{	588	{
504	LOCK (reslock);	589	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		590
507	if (req)	591	if (res > 0)
508	{
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;	592	croak (0);
522		593
523	--nreqs;	594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
524		596
525	if (req->type == REQ_QUIT)	597	poll_wait ();
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	598	}
554
555	return count;
556	}	599	}
557		600
558	static void *aio_proc(void *arg);
559
560	static void start_thread (void)	601	static void atfork_child (void)
561	{	602	{
562	sigset_t fullsigset, oldsigset;	603	create_respipe ();
563	pthread_attr_t attr;
564
565	worker *wrk = calloc (1, sizeof (worker));
566
567	if (!wrk)
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{
581	wrk->prev = &wrk_first;
582	wrk->next = wrk_first.next;
583	wrk_first.next->prev = wrk;
584	wrk_first.next = wrk;
585	started++;
586	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}
593
594	static void req_send (aio_req req)
595	{
596	while (started < wanted && nreqs >= started)
597	start_thread ();
598
599	++nreqs;
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606
607	static void end_thread (void)
608	{
609	aio_req req;
610
611	Newz (0, req, 1, aio_cb);
612
613	req->type = REQ_QUIT;
614	req->pri = PRI_MAX + PRI_BIAS;
615
616	req_send (req);
617	}
618
619	static void min_parallel (int nthreads)
620	{
621	if (wanted < nthreads)
622	wanted = nthreads;
623	}
624
625	static void max_parallel (int nthreads)
626	{
627	int cur = started;
628
629	if (wanted > nthreads)
630	wanted = nthreads;
631
632	while (cur > wanted)
633	{
634	end_thread ();
635	cur--;
636	}
637
638	while (started > wanted)
639	{
640	poll_wait ();
641	poll_cb ();
642	}
643	}
644
645	static void create_pipe ()
646	{
647	if (pipe (respipe))
648	croak ("unable to initialize result pipe");
649
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
651	croak ("cannot set result pipe to nonblocking mode");
652
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
654	croak ("cannot set result pipe to nonblocking mode");
655	}	604	}
656		605
657	/*****************************************************************************/	606	/*****************************************************************************/
658	/* work around various missing functions */
659		607
660	#if !HAVE_PREADWRITE	608	#if !_POSIX_MAPPED_FILES
661	# define pread aio_pread	609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
662	# define pwrite aio_pwrite	610	# define munmap(addr,length) (errno = ENOSYS, -1)
663
664	/*
665	* make our pread/pwrite safe against themselves, but not against
666	* normal read/write by using a mutex. slows down execution a lot,
667	* but that's your problem, not mine.
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
672	{
673	ssize_t res;
674	off_t ooffset;
675
676	LOCK (preadwritelock);
677	ooffset = lseek (fd, 0, SEEK_CUR);
678	lseek (fd, offset, SEEK_SET);
679	res = read (fd, buf, count);
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682
683	return res;
684	}
685
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
687	{
688	ssize_t res;
689	off_t ooffset;
690
691	LOCK (preadwritelock);
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697
698	return res;
699	}
700	#endif
701
702	#if !HAVE_FDATASYNC
703	# define fdatasync fsync
704	#endif
705
706	#if !HAVE_READAHEAD
707	# define readahead aio_readahead
708
709	static ssize_t readahead (int fd, off_t offset, size_t count)
710	{
711	dBUF;
712
713	while (count > 0)
714	{
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
716
717	pread (fd, aio_buf, len, offset);
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;
763
764	#if HAVE_SENDFILE
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767
768	# elif __freebsd
769	/*
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777	if (res < 0 && sbytes)
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}
781
782	# elif __hpux
783	res = sendfile (ofd, ifd, offset, count, 0, 0);
784
785	# elif __solaris
786	{
787	struct sendfilevec vec;
788	size_t sbytes;
789
790	vec.sfv_fd = ifd;
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794
795	res = sendfilev (ofd, &vec, 1, &sbytes);
796
797	if (res < 0 && sbytes)
798	res = sbytes;
799	}
800
801	# endif	611	#endif
802	#else
803	res = -1;
804	errno = ENOSYS;
805	#endif
806		612
807	if (res < 0	613	#define MMAP_MAGIC PERL_MAGIC_ext
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817		614
818	res = 0;	615	static int
		616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		617	{
		618	int old_errno = errno;
		619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		620	errno = old_errno;
819		621
820	while (count)	622	mg->mg_obj = 0; /* just in case */
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825		623
826	if (cnt <= 0)	624	SvREADONLY_off (sv);
827	{	625	SvCUR_set (sv, 0);
828	if (cnt && !res) res = -1;	626	SvLEN_set (sv, 0);
829	break;	627	SvPVX (sv) = 0;
830	}	628	SvOK_off (sv);
831		629
832	cnt = write (ofd, aio_buf, cnt);
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;	630	return 0;
847	}	631	}
848		632
849	/* read a full directory */	633	static MGVTBL mmap_vtbl = {
850	static void scandir_ (aio_req req, worker *self)	634	0, 0, 0, 0, mmap_free
851	{	635	};
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}
903	}
904
905	if (errno)
906	res = -1;
907
908	req->result = res;
909	}
910		636
911	/*****************************************************************************/	637	/*****************************************************************************/
912		638
913	static void *aio_proc (void *thr_arg)	639	static SV *
		640	get_cb (SV *cb_sv)
914	{	641	{
915	aio_req req;	642	SvGETMAGIC (cb_sv);
916	int type;	643	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}
1004
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)
1034	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();
1060
1061	atfork_parent ();
1062	}	644	}
1063		645
1064	#define dREQ \	646	#define dREQ \
		647	SV *cb_cv; \
1065	aio_req req; \	648	aio_req req; \
1066	int req_pri = next_pri; \	649	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \	650	next_pri = EIO_PRI_DEFAULT; \
1068	\	651	\
1069	if (SvOK (callback) && !SvROK (callback)) \	652	cb_cv = get_cb (callback); \
1070	croak ("callback must be undef or of reference type"); \
1071	\	653	\
1072	Newz (0, req, 1, aio_cb); \	654	Newz (0, req, 1, eio_req); \
1073	if (!req) \	655	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \	656	croak ("out of memory during eio_req allocation"); \
1075	\	657	\
1076	req->callback = newSVsv (callback); \	658	req->callback = SvREFCNT_inc (cb_cv); \
1077	req->pri = req_pri	659	req->pri = req_pri
1078		660
1079	#define REQ_SEND \	661	#define REQ_SEND \
		662	PUTBACK; \
1080	req_send (req); \	663	req_submit (req); \
		664	SPAGAIN; \
1081	\	665	\
1082	if (GIMME_V != G_VOID) \	666	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));	667	XPUSHs (req_sv (req, aio_req_stash));
1084		668
1085	MODULE = IO::AIO PACKAGE = IO::AIO	669	MODULE = IO::AIO PACKAGE = IO::AIO
1086		670
1087	PROTOTYPES: ENABLE	671	PROTOTYPES: ENABLE
1088		672
1089	BOOT:	673	BOOT:
1090	{	674	{
		675	static const struct {
		676	const char *name;
		677	IV iv;
		678	} *civ, const_iv[] = {
		679	# define const_niv(name, value) { # name, (IV) value },
		680	# define const_iv(name) { # name, (IV) name },
		681	# define const_eio(name) { # name, (IV) EIO_ ## name },
		682	const_iv (EXDEV)
		683	const_iv (ENOSYS)
		684	const_iv (O_RDONLY)
		685	const_iv (O_WRONLY)
		686	const_iv (O_RDWR)
		687	const_iv (O_CREAT)
		688	const_iv (O_TRUNC)
		689	const_iv (O_EXCL)
		690	const_iv (O_APPEND)
		691	#ifndef _WIN32
		692	const_iv (S_IFIFO)
		693	#endif
		694	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		695	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		696	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		697	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		698	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		699	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		700
		701	const_iv (ST_RDONLY)
		702	const_iv (ST_NOSUID)
		703	const_iv (ST_NODEV)
		704	const_iv (ST_NOEXEC)
		705	const_iv (ST_SYNCHRONOUS)
		706	const_iv (ST_MANDLOCK)
		707	const_iv (ST_WRITE)
		708	const_iv (ST_APPEND)
		709	const_iv (ST_IMMUTABLE)
		710	const_iv (ST_NOATIME)
		711	const_iv (ST_NODIRATIME)
		712	const_iv (ST_RELATIME)
		713
		714	const_iv (PROT_EXEC)
		715	const_iv (PROT_NONE)
		716	const_iv (PROT_READ)
		717	const_iv (PROT_WRITE)
		718
		719	/*const_iv (MAP_FIXED)*/
		720	const_iv (MAP_PRIVATE)
		721	const_iv (MAP_SHARED)
		722	const_iv (MAP_ANONYMOUS)
		723
		724	/* linuxish */
		725	const_iv (MAP_HUGETLB)
		726	const_iv (MAP_LOCKED)
		727	const_iv (MAP_NORESERVE)
		728	const_iv (MAP_POPULATE)
		729	const_iv (MAP_NONBLOCK)
		730
		731	const_iv (MCL_FUTURE)
		732	const_iv (MCL_CURRENT)
		733
		734	const_eio (MS_ASYNC)
		735	const_eio (MS_INVALIDATE)
		736	const_eio (MS_SYNC)
		737
		738	const_eio (MT_MODIFY)
		739
		740	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		741	const_eio (SYNC_FILE_RANGE_WRITE)
		742	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		743
		744	const_eio (READDIR_DENTS)
		745	const_eio (READDIR_DIRS_FIRST)
		746	const_eio (READDIR_STAT_ORDER)
		747	const_eio (READDIR_FOUND_UNKNOWN)
		748
		749	const_eio (DT_UNKNOWN)
		750	const_eio (DT_FIFO)
		751	const_eio (DT_CHR)
		752	const_eio (DT_DIR)
		753	const_eio (DT_BLK)
		754	const_eio (DT_REG)
		755	const_eio (DT_LNK)
		756	const_eio (DT_SOCK)
		757	const_eio (DT_WHT)
		758	};
		759
1091	HV *stash = gv_stashpv ("IO::AIO", 1);	760	aio_stash = gv_stashpv ("IO::AIO" , 1);
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	761	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	762	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1095		763
		764	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		765	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		766
		767	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		768
1096	create_pipe ();	769	create_respipe ();
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1098	}
1099		770
		771	if (eio_init (want_poll, done_poll) < 0)
		772	croak ("IO::AIO: unable to initialise eio library");
		773
		774	/* atfork child called in fifo order, so before eio's handler */
		775	X_THREAD_ATFORK (0, 0, atfork_child);
		776	}
		777
1100	void	778	void
1101	min_parallel (nthreads)	779	max_poll_reqs (int nreqs)
1102	int nthreads
1103	PROTOTYPE: $	780	PROTOTYPE: $
		781	CODE:
		782	eio_set_max_poll_reqs (nreqs);
1104		783
1105	void	784	void
1106	max_parallel (nthreads)	785	max_poll_time (double nseconds)
1107	int nthreads
1108	PROTOTYPE: $	786	PROTOTYPE: $
		787	CODE:
		788	eio_set_max_poll_time (nseconds);
1109		789
1110	void	790	void
		791	min_parallel (int nthreads)
		792	PROTOTYPE: $
		793	CODE:
		794	eio_set_min_parallel (nthreads);
		795
		796	void
		797	max_parallel (int nthreads)
		798	PROTOTYPE: $
		799	CODE:
		800	eio_set_max_parallel (nthreads);
		801
		802	void
		803	max_idle (int nthreads)
		804	PROTOTYPE: $
		805	CODE:
		806	eio_set_max_idle (nthreads);
		807
		808	void
		809	max_outstanding (int maxreqs)
		810	PROTOTYPE: $
		811	CODE:
		812	max_outstanding = maxreqs;
		813
		814	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	815	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$	816	PROTOTYPE: $$$;$
1117	PPCODE:	817	PPCODE:
1118	{	818	{
1119	dREQ;	819	dREQ;
1120		820
1121	req->type = REQ_OPEN;	821	req->type = EIO_OPEN;
1122	req->data = newSVsv (pathname);	822	req->sv1 = newSVsv (pathname);
1123	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1124	req->fd = flags;	824	req->int1 = flags;
1125	req->mode = mode;	825	req->int2 = mode;
1126		826
1127	REQ_SEND;	827	REQ_SEND;
1128	}	828	}
1129		829
1130	void	830	void
1131	aio_close (fh,callback=&PL_sv_undef)	831	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$	832	PROTOTYPE: $;$
1135	ALIAS:	833	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC	834	aio_fsync = EIO_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC	835	aio_fdatasync = EIO_FDATASYNC
1139	PPCODE:	836	PPCODE:
1140	{	837	{
		838	int fd = s_fileno_croak (fh, 0);
1141	dREQ;	839	dREQ;
1142		840
1143	req->type = ix;	841	req->type = ix;
1144	req->fh = newSVsv (fh);	842	req->sv1 = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	843	req->int1 = fd;
1146		844
1147	REQ_SEND (req);	845	REQ_SEND (req);
1148	}	846	}
1149		847
1150	void	848	void
		849	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		850	PROTOTYPE: $$$$;$
		851	PPCODE:
		852	{
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	req->type = EIO_SYNC_FILE_RANGE;
		857	req->sv1 = newSVsv (fh);
		858	req->int1 = fd;
		859	req->offs = offset;
		860	req->size = nbytes;
		861	req->int2 = flags;
		862
		863	REQ_SEND (req);
		864	}
		865
		866	void
		867	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		868	PROTOTYPE: $;$
		869	PPCODE:
		870	{
		871	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		872	int fd = s_fileno_croak (fh, 0);
		873	dREQ;
		874
		875	if (close_pipe < 0)
		876	{
		877	int pipefd [2];
		878
		879	if (pipe (pipefd) < 0
		880	|| close (pipefd [1]) < 0
		881	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		882	abort (); /*D*/
		883
		884	close_pipe = pipefd [0];
		885	}
		886
		887	req->type = EIO_DUP2;
		888	req->int1 = close_pipe;
		889	req->sv2 = newSVsv (fh);
		890	req->int2 = fd;
		891
		892	REQ_SEND (req);
		893	}
		894
		895	void
1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	896	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:	897	ALIAS:
1159	aio_read = REQ_READ	898	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	899	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$	900	PROTOTYPE: $$$$$;$
1162	PPCODE:	901	PPCODE:
1163	{	902	{
1164	aio_req req;
1165	STRLEN svlen;	903	STRLEN svlen;
		904	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1166	char *svptr = SvPVbyte (data, svlen);	905	char *svptr = SvPVbyte (data, svlen);
1167		906	UV len = SvUV (length);
1168	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);
1170		907
1171	if (dataoffset < 0)	908	if (dataoffset < 0)
1172	dataoffset += svlen;	909	dataoffset += svlen;
1173		910
1174	if (dataoffset < 0 || dataoffset > svlen)	911	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	912	croak ("dataoffset outside of data scalar");
1176		913
1177	if (ix == REQ_WRITE)	914	if (ix == EIO_WRITE)
1178	{	915	{
1179	/* write: check length and adjust. */	916	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	917	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	918	len = svlen - dataoffset;
1182	}	919	}
1183	else	920	else
1184	{	921	{
1185	/* read: grow scalar as necessary */	922	/* read: check type and grow scalar as necessary */
		923	SvUPGRADE (data, SVt_PV);
1186	svptr = SvGROW (data, length + dataoffset);	924	svptr = SvGROW (data, len + dataoffset + 1);
1187	}	925	}
1188
1189	if (length < 0)
1190	croak ("length must not be negative");
1191		926
1192	{	927	{
1193	dREQ;	928	dREQ;
1194		929
1195	req->type = ix;	930	req->type = ix;
1196	req->fh = newSVsv (fh);	931	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	932	req->int1 = fd;
1198	: IoOFP (sv_2io (fh)));	933	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	934	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	935	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	936	req->ptr2 = (char *)svptr + dataoffset;
		937	req->stroffset = dataoffset;
1203		938
1204	if (!SvREADONLY (data))	939	if (!SvREADONLY (data))
1205	{	940	{
1206	SvREADONLY_on (data);	941	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	942	req->flags |= FLAG_SV2_RO_OFF;
1208	}	943	}
1209		944
1210	REQ_SEND;	945	REQ_SEND;
1211	}	946	}
1212	}	947	}
1213		948
1214	void	949	void
		950	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		951	PROTOTYPE: $$;$
		952	PPCODE:
		953	{
		954	SV *data;
		955	dREQ;
		956
		957	req->type = EIO_READLINK;
		958	req->sv1 = newSVsv (path);
		959	req->ptr1 = SvPVbyte_nolen (req->sv1);
		960
		961	REQ_SEND;
		962	}
		963
		964	void
1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	965	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1216	SV * out_fh
1217	SV * in_fh
1218	UV in_offset
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$	966	PROTOTYPE: $$$$;$
1222	PPCODE:	967	PPCODE:
1223	{	968	{
		969	int ifd = s_fileno_croak (in_fh , 0);
		970	int ofd = s_fileno_croak (out_fh, 1);
1224	dREQ;	971	dREQ;
1225		972
1226	req->type = REQ_SENDFILE;	973	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	974	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	975	req->int1 = ofd;
1229	req->fh2 = newSVsv (in_fh);	976	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	977	req->int2 = ifd;
1231	req->offset = in_offset;	978	req->offs = in_offset;
1232	req->length = length;	979	req->size = length;
1233		980
1234	REQ_SEND;	981	REQ_SEND;
1235	}	982	}
1236		983
1237	void	984	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	985	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$	986	PROTOTYPE: $$$;$
1244	PPCODE:	987	PPCODE:
1245	{	988	{
		989	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	990	dREQ;
1247		991
1248	req->type = REQ_READAHEAD;	992	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	993	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	994	req->int1 = fd;
1251	req->offset = offset;	995	req->offs = offset;
1252	req->length = length;	996	req->size = length;
1253		997
1254	REQ_SEND;	998	REQ_SEND;
1255	}	999	}
1256		1000
1257	void	1001	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	1002	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	1003	ALIAS:
1262	aio_stat = REQ_STAT	1004	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	1005	aio_lstat = EIO_LSTAT
		1006	aio_statvfs = EIO_STATVFS
1264	PPCODE:	1007	PPCODE:
1265	{	1008	{
1266	dREQ;	1009	dREQ;
1267		1010
1268	New (0, req->statdata, 1, Stat_t);	1011	req->sv1 = newSVsv (fh_or_path);
1269	if (!req->statdata)
1270	{
1271	req_free (req);
1272	croak ("out of memory during aio_req->statdata allocation");
1273	}
1274		1012
1275	if (SvPOK (fh_or_path))	1013	if (SvPOK (req->sv1))
1276	{	1014	{
1277	req->type = ix;	1015	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);	1016	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280	}	1017	}
1281	else	1018	else
1282	{	1019	{
1283	req->type = REQ_FSTAT;	1020	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1021	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}	1022	}
1287		1023
1288	REQ_SEND;	1024	REQ_SEND;
1289	}	1025	}
1290		1026
1291	void	1027	void
		1028	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1034	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1035	req->sv1 = newSVsv (fh_or_path);
		1036
		1037	if (SvPOK (req->sv1))
		1038	{
		1039	req->type = EIO_UTIME;
		1040	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1041	}
		1042	else
		1043	{
		1044	req->type = EIO_FUTIME;
		1045	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1046	}
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1053	PPCODE:
		1054	{
		1055	dREQ;
		1056
		1057	req->sv1 = newSVsv (fh_or_path);
		1058	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1059
		1060	if (SvPOK (req->sv1))
		1061	{
		1062	req->type = EIO_TRUNCATE;
		1063	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1064	}
		1065	else
		1066	{
		1067	req->type = EIO_FTRUNCATE;
		1068	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1069	}
		1070
		1071	REQ_SEND;
		1072	}
		1073
		1074	void
		1075	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1076	ALIAS:
		1077	aio_chmod = EIO_CHMOD
		1078	aio_mkdir = EIO_MKDIR
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->int2 = mode;
		1084	req->sv1 = newSVsv (fh_or_path);
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = ix;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FCHMOD;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	dREQ;
		1105
		1106	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1107	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1108	req->sv1 = newSVsv (fh_or_path);
		1109
		1110	if (SvPOK (req->sv1))
		1111	{
		1112	req->type = EIO_CHOWN;
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	}
		1115	else
		1116	{
		1117	req->type = EIO_FCHOWN;
		1118	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1119	}
		1120
		1121	REQ_SEND;
		1122	}
		1123
		1124	void
		1125	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_READDIR;
		1131	req->sv1 = newSVsv (pathname);
		1132	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1133	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1134
		1135	if (flags & EIO_READDIR_DENTS)
		1136	req->int1 |= EIO_READDIR_CUSTOM2;
		1137
		1138	REQ_SEND;
		1139	}
		1140
		1141	void
1292	aio_unlink (pathname,callback=&PL_sv_undef)	1142	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	1143	ALIAS:
1296	aio_unlink = REQ_UNLINK	1144	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	1145	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	1146	aio_readdir = EIO_READDIR
1299	PPCODE:	1147	PPCODE:
1300	{	1148	{
1301	dREQ;	1149	dREQ;
1302		1150
1303	req->type = ix;	1151	req->type = ix;
1304	req->data = newSVsv (pathname);	1152	req->sv1 = newSVsv (pathname);
1305	req->dataptr = SvPVbyte_nolen (req->data);	1153	req->ptr1 = SvPVbyte_nolen (req->sv1);
1306		1154
1307	REQ_SEND;	1155	REQ_SEND;
1308	}	1156	}
1309		1157
1310	void	1158	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1159	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:	1160	ALIAS:
1316	aio_link = REQ_LINK	1161	aio_link = EIO_LINK
1317	aio_symlink = REQ_SYMLINK	1162	aio_symlink = EIO_SYMLINK
1318	aio_rename = REQ_RENAME	1163	aio_rename = EIO_RENAME
1319	PPCODE:	1164	PPCODE:
1320	{	1165	{
1321	dREQ;	1166	dREQ;
1322		1167
1323	req->type = ix;	1168	req->type = ix;
1324	req->fh = newSVsv (oldpath);	1169	req->sv1 = newSVsv (oldpath);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	1170	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->data = newSVsv (newpath);	1171	req->sv2 = newSVsv (newpath);
1327	req->dataptr = SvPVbyte_nolen (req->data);	1172	req->ptr2 = SvPVbyte_nolen (req->sv2);
1328		1173
1329	REQ_SEND;	1174	REQ_SEND;
1330	}	1175	}
1331		1176
1332	void	1177	void
1333	aio_busy (delay,callback=&PL_sv_undef)	1178	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	1179	PPCODE:
1337	{	1180	{
1338	dREQ;	1181	dREQ;
1339		1182
1340	req->type = REQ_BUSY;	1183	req->type = EIO_MKNOD;
1341	req->fd = delay < 0. ? 0 : delay;	1184	req->sv1 = newSVsv (pathname);
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1185	req->ptr1 = SvPVbyte_nolen (req->sv1);
1343		1186	req->int2 = (mode_t)mode;
		1187	req->offs = dev;
		1188
1344	REQ_SEND;	1189	REQ_SEND;
1345	}	1190	}
1346		1191
1347	void	1192	void
		1193	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1194	ALIAS:
		1195	aio_mtouch = EIO_MTOUCH
		1196	aio_msync = EIO_MSYNC
		1197	PROTOTYPE: $$$$;$
		1198	PPCODE:
		1199	{
		1200	STRLEN svlen;
		1201	UV len = SvUV (length);
		1202	char *svptr = SvPVbyte (data, svlen);
		1203
		1204	if (offset < 0)
		1205	offset += svlen;
		1206
		1207	if (offset < 0 || offset > svlen)
		1208	croak ("offset outside of scalar");
		1209
		1210	if (!SvOK (length) || len + offset > svlen)
		1211	len = svlen - offset;
		1212
		1213	{
		1214	dREQ;
		1215
		1216	req->type = ix;
		1217	req->size = len;
		1218	req->sv2 = SvREFCNT_inc (data);
		1219	req->ptr2 = (char *)svptr + offset;
		1220	req->int1 = flags;
		1221
		1222	REQ_SEND;
		1223	}
		1224	}
		1225
		1226	void
		1227	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->type = EIO_BUSY;
		1233	req->nv1 = delay < 0. ? 0. : delay;
		1234
		1235	REQ_SEND;
		1236	}
		1237
		1238	void
1348	aio_group (callback=&PL_sv_undef)	1239	aio_group (SV *callback=&PL_sv_undef)
1349	SV * callback
1350	PROTOTYPE: ;$	1240	PROTOTYPE: ;$
1351	PPCODE:	1241	PPCODE:
1352	{	1242	{
1353	dREQ;	1243	dREQ;
1354		1244
1355	req->type = REQ_GROUP;	1245	req->type = EIO_GROUP;
		1246
1356	req_send (req);	1247	req_submit (req);
1357
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1248	XPUSHs (req_sv (req, aio_grp_stash));
1359	}	1249	}
1360		1250
1361	void	1251	void
1362	aio_nop (callback=&PL_sv_undef)	1252	aio_nop (SV *callback=&PL_sv_undef)
1363	SV * callback	1253	ALIAS:
		1254	aio_nop = EIO_NOP
		1255	aio_sync = EIO_SYNC
1364	PPCODE:	1256	PPCODE:
1365	{	1257	{
1366	dREQ;	1258	dREQ;
1367		1259
1368	req->type = REQ_NOP;	1260	req->type = ix;
1369		1261
1370	REQ_SEND;	1262	REQ_SEND;
1371	}	1263	}
1372		1264
1373	void	1265	int
1374	aioreq_pri (int pri = DEFAULT_PRI)	1266	aioreq_pri (int pri = 0)
1375	CODE:	1267	PROTOTYPE: ;$
		1268	CODE:
		1269	RETVAL = next_pri;
		1270	if (items > 0)
		1271	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	1272	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	1273	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	1274	next_pri = pri;
		1275	}
		1276	OUTPUT:
		1277	RETVAL
1379		1278
1380	void	1279	void
1381	aioreq_nice (int nice = 0)	1280	aioreq_nice (int nice = 0)
1382	CODE:	1281	CODE:
1383	nice = next_pri - nice;	1282	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	1283	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	1284	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	1285	next_pri = nice;
1387		1286
1388	void	1287	void
1389	flush ()	1288	flush ()
1390	PROTOTYPE:	1289	PROTOTYPE:
1391	CODE:	1290	CODE:
1392	while (nreqs)	1291	while (eio_nreqs ())
1393	{	1292	{
1394	poll_wait ();	1293	poll_wait ();
1395	poll_cb ();	1294	poll_cb ();
1396	}	1295	}
1397		1296
1398	void	1297	int
1399	poll()	1298	poll()
1400	PROTOTYPE:	1299	PROTOTYPE:
1401	CODE:	1300	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	1301	poll_wait ();
1405	poll_cb ();	1302	RETVAL = poll_cb ();
1406	}	1303	OUTPUT:
		1304	RETVAL
1407		1305
1408	int	1306	int
1409	poll_fileno()	1307	poll_fileno()
1410	PROTOTYPE:	1308	PROTOTYPE:
1411	CODE:	1309	CODE:
1412	RETVAL = respipe [0];	1310	RETVAL = s_epipe_fd (&respipe);
1413	OUTPUT:	1311	OUTPUT:
1414	RETVAL	1312	RETVAL
1415		1313
1416	int	1314	int
1417	poll_cb(...)	1315	poll_cb(...)
…		…
1423		1321
1424	void	1322	void
1425	poll_wait()	1323	poll_wait()
1426	PROTOTYPE:	1324	PROTOTYPE:
1427	CODE:	1325	CODE:
1428	if (nreqs)
1429	poll_wait ();	1326	poll_wait ();
1430		1327
1431	int	1328	int
1432	nreqs()	1329	nreqs()
1433	PROTOTYPE:	1330	PROTOTYPE:
1434	CODE:	1331	CODE:
1435	RETVAL = nreqs;	1332	RETVAL = eio_nreqs ();
1436	OUTPUT:	1333	OUTPUT:
1437	RETVAL	1334	RETVAL
1438		1335
		1336	int
		1337	nready()
		1338	PROTOTYPE:
		1339	CODE:
		1340	RETVAL = eio_nready ();
		1341	OUTPUT:
		1342	RETVAL
		1343
		1344	int
		1345	npending()
		1346	PROTOTYPE:
		1347	CODE:
		1348	RETVAL = eio_npending ();
		1349	OUTPUT:
		1350	RETVAL
		1351
		1352	int
		1353	nthreads()
		1354	PROTOTYPE:
		1355	CODE:
		1356	RETVAL = eio_nthreads ();
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	int
		1361	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1362	PROTOTYPE: $$$$
		1363	CODE:
		1364	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1365	RETVAL = posix_fadvise (fh, offset, length, advice);
		1366	#else
		1367	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1368	#endif
		1369	OUTPUT:
		1370	RETVAL
		1371
		1372	ssize_t
		1373	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1374	PROTOTYPE: $$$$
		1375	CODE:
		1376	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	void
		1381	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1382	PROTOTYPE: $$$$$;$
		1383	PPCODE:
		1384	sv_unmagic (scalar, MMAP_MAGIC);
		1385	{
		1386	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1387	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1388	if (addr == (void *)-1)
		1389	XSRETURN_NO;
		1390
		1391	/* we store the length in mg_obj, as namlen is I32 :/ */
		1392	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1393	->mg_obj = (SV *)length;
		1394
		1395	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1396	if (!(prot & PROT_WRITE))
		1397	SvREADONLY_on (scalar);
		1398
		1399	SvPVX (scalar) = (char *)addr;
		1400	SvCUR_set (scalar, length);
		1401	SvLEN_set (scalar, 0);
		1402	SvPOK_only (scalar);
		1403
		1404	XSRETURN_YES;
		1405	}
		1406
		1407	void
		1408	munmap (SV *scalar)
		1409	PROTOTYPE: $
		1410	CODE:
		1411	sv_unmagic (scalar, MMAP_MAGIC);
		1412
		1413	int
		1414	mlockall (int flags)
		1415	PROTOTYPE: $
		1416	CODE:
		1417	#if _POSIX_MEMLOCK
		1418	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1419	extern int mallopt (int, int);
		1420	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1421	#endif
		1422	mlockall (flags);
		1423	#else
		1424	RETVAL = -1;
		1425	errno = ENOSYS;
		1426	#endif
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	int
		1431	munlockall ()
		1432	PROTOTYPE:
		1433	CODE:
		1434	#if _POSIX_MEMLOCK
		1435	munlockall ();
		1436	#else
		1437	RETVAL = -1;
		1438	errno = ENOSYS;
		1439	#endif
		1440	OUTPUT:
		1441	RETVAL
		1442
		1443	void _on_next_submit (SV *cb)
		1444	CODE:
		1445	SvREFCNT_dec (on_next_submit);
		1446	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1447
1439	PROTOTYPES: DISABLE	1448	PROTOTYPES: DISABLE
1440		1449
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1450	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1451
1443	void	1452	void
1444	cancel (aio_req_ornot req)	1453	cancel (aio_req_ornot req)
1445	CODE:	1454	CODE:
1446	req_cancel (req);	1455	eio_cancel (req);
1447		1456
1448	void	1457	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1458	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450	CODE:	1459	PPCODE:
		1460	{
		1461	if (GIMME_V != G_VOID)
		1462	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1463
		1464	if (items > 1)
		1465	{
		1466	SV *cb_cv =get_cb (callback);
		1467
1451	SvREFCNT_dec (req->callback);	1468	SvREFCNT_dec (req->callback);
1452	req->callback = newSVsv (callback);	1469	req->callback = SvREFCNT_inc (cb_cv);
		1470	}
		1471	}
1453		1472
1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455		1474
1456	void	1475	void
1457	add (aio_req grp, ...)	1476	add (aio_req grp, ...)
1458	PPCODE:	1477	PPCODE:
1459	{	1478	{
1460	int i;	1479	int i;
1461	aio_req req;
1462		1480
1463	if (grp->fd == 2)	1481	if (grp->int1 == 2)
1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1482	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1465		1483
1466	for (i = 1; i < items; ++i )	1484	for (i = 1; i < items; ++i )
1467	{	1485	{
		1486	aio_req req;
		1487
1468	if (GIMME_V != G_VOID)	1488	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1489	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1490
1471	req = SvAIO_REQ (ST (i));	1491	req = SvAIO_REQ (ST (i));
1472		1492
1473	if (req)	1493	if (req)
1474	{	1494	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	}	1495	}
1487	}	1496	}
1488		1497
1489	void	1498	void
1490	cancel_subs (aio_req_ornot req)	1499	cancel_subs (aio_req_ornot req)
…		…
1494	void	1503	void
1495	result (aio_req grp, ...)	1504	result (aio_req grp, ...)
1496	CODE:	1505	CODE:
1497	{	1506	{
1498	int i;	1507	int i;
		1508	AV *av;
		1509
		1510	grp->errorno = errno;
		1511
1499	AV *av = newAV ();	1512	av = newAV ();
		1513	av_extend (av, items - 1);
1500		1514
1501	for (i = 1; i < items; ++i )	1515	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	1516	av_push (av, newSVsv (ST (i)));
1503		1517
1504	SvREFCNT_dec (grp->data);	1518	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	1519	grp->sv1 = (SV *)av;
1506	}	1520	}
		1521
		1522	void
		1523	errno (aio_req grp, int errorno = errno)
		1524	CODE:
		1525	grp->errorno = errorno;
1507		1526
1508	void	1527	void
1509	limit (aio_req grp, int limit)	1528	limit (aio_req grp, int limit)
1510	CODE:	1529	CODE:
1511	grp->fd2 = limit;	1530	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		1531
1514	void	1532	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	1533	feed (aio_req grp, SV *callback=&PL_sv_undef)
1516	CODE:	1534	CODE:
1517	{	1535	{
1518	SvREFCNT_dec (grp->fh2);	1536	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	1537	grp->sv2 = newSVsv (callback);
		1538	grp->feed = aio_grp_feed;
1520		1539
1521	if (grp->fd2 <= 0)	1540	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	1541	grp->int2 = 2;
1523		1542
1524	aio_grp_feed (grp);	1543	eio_grp_limit (grp, grp->int2);
1525	}	1544	}
1526		1545

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