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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.78 by root, Thu Oct 26 14:35:34 2006 UTC vs.
Revision 1.165 by root, Sun May 9 20:42:55 2010 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>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# 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
38	# include <sys/uio.h>	68	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# 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
43	# else	186	# else
44	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	188	# endif
46	#endif	189	#endif
47		190	#ifndef MAP_HUGETLB
48	/* used for struct dirent, AIX doesn't provide it */	191	# define MAP_HUGETLB 0
49	#ifndef NAME_MAX
50	# define NAME_MAX 4096
51	#endif	192	#endif
52		193	#ifndef MAP_LOCKED
53	#ifndef PTHREAD_STACK_MIN	194	# define MAP_LOCKED 0
54	/* care for broken platforms, e.g. windows */
55	# define PTHREAD_STACK_MIN 16384
56	#endif	195	#endif
57		196	#ifndef MAP_NORESERVE
58	#if __ia64	197	# define MAP_NORESERVE 0
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif	198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
65		205
66	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
67	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
68		209
69	#define dBUF \	210	static int req_invoke (eio_req *req);
70	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
71	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
73	UNLOCK (wrklock); \
74	if (!aio_buf) \
75	return -1;
76		214
77	enum {	215	enum {
78	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
79	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
83	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85	REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,
87	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,
89	};	217	};
90		218
91	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
92	#define AIO_GRP_KLASS "IO::AIO::GRP"
93		220
94	typedef struct aio_cb
95	{
96	struct aio_cb *volatile next;
97
98	SV *data, *callback;
99	SV *fh, *fh2;
100	void *dataptr, *data2ptr;
101	Stat_t *statdata;
102	off_t offset;
103	size_t length;
104	ssize_t result;
105
106	STRLEN dataoffset;
107	int type;
108	int fd, fd2;
109	int errorno;
110	mode_t mode; /* open */
111
112	unsigned char flags;
113	unsigned char pri;
114
115	SV *self; /* the perl counterpart of this request, if any */
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
117	} aio_cb;
118
119	enum {
120	FLAG_CANCELLED = 0x01,
121	};
122
123	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
124	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
125		223
126	enum {	224	static SV *on_next_submit;
127	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
128	PRI_MAX = 4,	226	static int max_outstanding;
129		227
130	DEFAULT_PRI = 0,	228	static s_epipe respipe;
131	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};
134		229
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
137	static unsigned int started, wanted;
138	static volatile unsigned int nreqs;
139	static volatile unsigned int max_outstanding = 0xffffffff;
140	static int respipe [2];
141
142	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
143	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
144	#else
145	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
146	#endif
147
148	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
149	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
150
151	/* worker threads management */
152	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
153
154	typedef struct worker {
155	/* locked by wrklock */
156	struct worker *prev, *next;
157
158	pthread_t tid;
159
160	/* locked by reslock, reqlock or wrklock */
161	aio_req req; /* currently processed request */
162	void *dbuf;
163	DIR *dirp;
164	} worker;
165
166	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
167
168	static void worker_clear (worker *wrk)
169	{
170	if (wrk->dirp)
171	{
172	closedir (wrk->dirp);
173	wrk->dirp = 0;
174	}
175
176	if (wrk->dbuf)
177	{
178	free (wrk->dbuf);
179	wrk->dbuf = 0;
180	}
181	}
182
183	static void worker_free (worker *wrk)
184	{
185	wrk->next->prev = wrk->prev;
186	wrk->prev->next = wrk->next;
187
188	free (wrk);
189	}
190
191	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
192	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
193	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
194
195	/*
196	* a somewhat faster data structure might be nice, but
197	* with 8 priorities this actually needs <20 insns
198	* per shift, the most expensive operation.
199	*/
200	typedef struct {
201	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
202	int size;
203	} reqq;
204
205	static reqq req_queue;
206	static reqq res_queue;
207
208	int reqq_push (reqq *q, aio_req req)
209	{
210	int pri = req->pri;
211	req->next = 0;
212
213	if (q->qe[pri])
214	{
215	q->qe[pri]->next = req;
216	q->qe[pri] = req;
217	}
218	else
219	q->qe[pri] = q->qs[pri] = req;
220
221	return q->size++;
222	}
223
224	aio_req reqq_shift (reqq *q)
225	{
226	int pri;
227
228	if (!q->size)
229	return 0;
230
231	--q->size;
232
233	for (pri = NUM_PRI; pri--; )
234	{
235	aio_req req = q->qs[pri];
236
237	if (req)
238	{
239	if (!(q->qs[pri] = req->next))
240	q->qe[pri] = 0;
241
242	return req;
243	}
244	}
245
246	abort ();
247	}
248
249	static int poll_cb (int max);
250	static void req_invoke (aio_req req);
251	static void req_free (aio_req req);	230	static void req_destroy (aio_req req);
252	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
253		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
254	/* must be called at most once */	245	/* must be called at most once */
255	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
256	{	247	{
257	if (!req->self)	248	if (!req->self)
258	{	249	{
259	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
261	}	252	}
262		253
263	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
264	}	255	}
265		256
266	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
267	{	258	{
268	MAGIC *mg;	259	MAGIC *mg;
269		260
270	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")))
271	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
272		266
273	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
274		268
275	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
276	}	270	}
277		271
278	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
279	{	273	{
280	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
281	{	275	{
282	int old_len = grp->length;
283
284	if (grp->fh2 && SvOK (grp->fh2))
285	{
286	dSP;	276	dSP;
287		277
288	ENTER;	278	ENTER;
289	SAVETMPS;	279	SAVETMPS;
290	PUSHMARK (SP);	280	PUSHMARK (SP);
291	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
292	PUTBACK;	282	PUTBACK;
293	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
294	SPAGAIN;	284	SPAGAIN;
295	FREETMPS;	285	FREETMPS;
296	LEAVE;	286	LEAVE;
297	}
298
299	/* stop if no progress has been made */
300	if (old_len == grp->length)
301	{
302	SvREFCNT_dec (grp->fh2);
303	grp->fh2 = 0;
304	break;
305	}
306	}	287	}
307	}	288	}
308		289
309	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
310	{	291	{
311	--grp->length;	292	eio_submit (req);
312		293
313	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
314	aio_grp_feed (grp);
315
316	/* finish, if done */
317	if (!grp->length && grp->fd)
318	{	295	{
319	req_invoke (grp);	296	dSP;
320	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);
321	}	304	}
322	}	305	}
323		306
324	static void poll_wait ()	307	static int req_invoke (eio_req *req)
325	{	308	{
326	fd_set rfd;	309	dSP;
327		310
328	while (nreqs)	311	if (req->flags & FLAG_SV2_RO_OFF)
		312	SvREADONLY_off (req->sv2);
		313
		314	if (!EIO_CANCELLED (req) && req->callback)
329	{	315	{
330	int size;	316	static SV *sv_result_cache; /* caches the result integer SV */
331	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */	317	SV *sv_result;
332	LOCK (reslock);
333	#endif
334	size = res_queue.size;
335	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
336	UNLOCK (reslock);
337	#endif
338
339	if (size)
340	return;
341
342	FD_ZERO(&rfd);
343	FD_SET(respipe [0], &rfd);
344
345	select (respipe [0] + 1, &rfd, 0, 0, 0);
346	}
347	}
348
349	static void req_invoke (aio_req req)
350	{
351	dSP;
352
353	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
354	{
355	errno = req->errorno;
356		318
357	ENTER;	319	ENTER;
358	SAVETMPS;	320	SAVETMPS;
359	PUSHMARK (SP);	321	PUSHMARK (SP);
360	EXTEND (SP, 1);	322	EXTEND (SP, 1);
361		323
		324	/* do not recreate the result IV from scratch each time */
		325	if (expect_true (sv_result_cache))
		326	{
		327	sv_result = sv_result_cache; sv_result_cache = 0;
		328	SvIV_set (sv_result, req->result);
		329	}
		330	else
		331	{
		332	sv_result = newSViv (req->result);
		333	SvREADONLY_on (sv_result);
		334	}
		335
362	switch (req->type)	336	switch (req->type)
363	{	337	{
364	case REQ_READDIR:	338	case EIO_READDIR:
365	{	339	{
366	SV *rv = &PL_sv_undef;	340	SV *rv = &PL_sv_undef;
367		341
368	if (req->result >= 0)	342	if (req->result >= 0)
369	{	343	{
370	int i;	344	int i;
371	char *buf = req->data2ptr;	345	char *names = (char *)req->ptr2;
		346	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
372	AV *av = newAV ();	347	AV *av = newAV ();
373		348
374	av_extend (av, req->result - 1);	349	av_extend (av, req->result - 1);
375		350
376	for (i = 0; i < req->result; ++i)	351	for (i = 0; i < req->result; ++i)
377	{	352	{
378	SV *sv = newSVpv (buf, 0);	353	if (req->int1 & EIO_READDIR_DENTS)
		354	{
		355	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
379		356
		357	if (req->int1 & EIO_READDIR_CUSTOM2)
		358	{
		359	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		360	AV *avent = newAV ();
		361
		362	av_extend (avent, 2);
		363
		364	if (!sv_type [ent->type])
		365	{
		366	sv_type [ent->type] = newSViv (ent->type);
		367	SvREADONLY_on (sv_type [ent->type]);
		368	}
		369
		370	av_store (avent, 0, namesv);
		371	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		372	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		373
		374	av_store (av, i, newRV_noinc ((SV *)avent));
		375	}
		376	else
380	av_store (av, i, sv);	377	av_store (av, i, namesv);
		378
		379	++ent;
		380	}
		381	else
		382	{
		383	SV *name = newSVpv (names, 0);
		384	av_store (av, i, name);
381	buf += SvCUR (sv) + 1;	385	names += SvCUR (name) + 1;
		386	}
382	}	387	}
383		388
384	rv = sv_2mortal (newRV_noinc ((SV *)av));	389	rv = sv_2mortal (newRV_noinc ((SV *)av));
385	}	390	}
386		391
387	PUSHs (rv);	392	PUSHs (rv);
		393
		394	if (req->int1 & EIO_READDIR_CUSTOM1)
		395	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
388	}	396	}
389	break;	397	break;
390		398
391	case REQ_OPEN:	399	case EIO_OPEN:
392	{	400	{
393	/* convert fd to fh */	401	/* convert fd to fh */
394	SV *fh;	402	SV *fh = &PL_sv_undef;
395		403
396	PUSHs (sv_2mortal (newSViv (req->result)));	404	if (req->result >= 0)
397	PUTBACK;	405	{
398	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	406	GV *gv = (GV *)sv_newmortal ();
399	SPAGAIN;	407	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		408	char sym [64];
		409	int symlen;
		410
		411	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		412	gv_init (gv, aio_stash, sym, symlen, 0);
400		413
401	fh = SvREFCNT_inc (POPs);	414	symlen = snprintf (
		415	sym,
		416	sizeof (sym),
		417	"%s&=%d",
		418	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		419	(int)req->result
		420	);
402		421
		422	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		423	fh = (SV *)gv;
		424	}
		425
403	PUSHMARK (SP);	426	PUSHs (fh);
404	XPUSHs (sv_2mortal (fh));
405	}	427	}
406	break;	428	break;
407		429
		430	case EIO_STATVFS:
		431	case EIO_FSTATVFS:
		432	{
		433	SV *rv = &PL_sv_undef;
		434
		435	if (req->result >= 0)
		436	{
		437	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		438	HV *hv = newHV ();
		439
		440	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		441
		442	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		443	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		444	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		445	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		446	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		447	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		448	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		449	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		450	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		451	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		452	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		453	}
		454
		455	PUSHs (rv);
		456	}
		457
		458	break;
		459
408	case REQ_GROUP:	460	case EIO_GROUP:
409	req->fd = 2; /* mark group as finished */	461	req->int1 = 2; /* mark group as finished */
410		462
411	if (req->data)	463	if (req->sv1)
412	{	464	{
413	int i;	465	int i;
414	AV *av = (AV *)req->data;	466	AV *av = (AV *)req->sv1;
415		467
416	EXTEND (SP, AvFILL (av) + 1);	468	EXTEND (SP, AvFILL (av) + 1);
417	for (i = 0; i <= AvFILL (av); ++i)	469	for (i = 0; i <= AvFILL (av); ++i)
418	PUSHs (*av_fetch (av, i, 0));	470	PUSHs (*av_fetch (av, i, 0));
419	}	471	}
420	break;	472	break;
421		473
422	case REQ_NOP:	474	case EIO_NOP:
423	case REQ_BUSY:	475	case EIO_BUSY:
424	break;	476	break;
425		477
		478	case EIO_READLINK:
		479	if (req->result > 0)
		480	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		481	break;
		482
		483	case EIO_STAT:
		484	case EIO_LSTAT:
		485	case EIO_FSTAT:
		486	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		487	PL_laststatval = req->result;
		488	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		489	PUSHs (sv_result);
		490	break;
		491
		492	case EIO_READ:
		493	{
		494	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		495	*SvEND (req->sv2) = 0;
		496	SvPOK_only (req->sv2);
		497	SvSETMAGIC (req->sv2);
		498	PUSHs (sv_result);
		499	}
		500	break;
		501
		502	case EIO_DUP2:
		503	if (req->result > 0)
		504	SvIV_set (sv_result, 0);
		505	/* FALLTHROUGH */
		506
426	default:	507	default:
427	PUSHs (sv_2mortal (newSViv (req->result)));	508	PUSHs (sv_result);
428	break;	509	break;
429	}	510	}
430		511
		512	errno = req->errorno;
431		513
432	PUTBACK;	514	PUTBACK;
433	call_sv (req->callback, G_VOID | G_EVAL);	515	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
434	SPAGAIN;	516	SPAGAIN;
		517
		518	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		519	SvREFCNT_dec (sv_result);
		520	else
		521	sv_result_cache = sv_result;
435		522
436	FREETMPS;	523	FREETMPS;
437	LEAVE;	524	LEAVE;
		525
		526	PUTBACK;
438	}	527	}
439		528
440	if (req->grp)	529	return !!SvTRUE (ERRSV);
441	{
442	aio_req grp = req->grp;
443
444	/* unlink request */
445	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
446	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
447
448	if (grp->grp_first == req)
449	grp->grp_first = req->grp_next;
450
451	aio_grp_dec (grp);
452	}
453
454	if (SvTRUE (ERRSV))
455	{
456	req_free (req);
457	croak (0);
458	}
459	}	530	}
460		531
461	static void req_free (aio_req req)	532	static void req_destroy (aio_req req)
462	{	533	{
463	if (req->self)	534	if (req->self)
464	{	535	{
465	sv_unmagic (req->self, PERL_MAGIC_ext);	536	sv_unmagic (req->self, PERL_MAGIC_ext);
466	SvREFCNT_dec (req->self);	537	SvREFCNT_dec (req->self);
467	}	538	}
468		539
469	SvREFCNT_dec (req->data);
470	SvREFCNT_dec (req->fh);	540	SvREFCNT_dec (req->sv1);
471	SvREFCNT_dec (req->fh2);	541	SvREFCNT_dec (req->sv2);
472	SvREFCNT_dec (req->callback);	542	SvREFCNT_dec (req->callback);
473	Safefree (req->statdata);
474
475	if (req->type == REQ_READDIR)
476	free (req->data2ptr);
477		543
478	Safefree (req);	544	Safefree (req);
479	}	545	}
480		546
481	static void req_cancel_subs (aio_req grp)	547	static void req_cancel_subs (aio_req grp)
482	{	548	{
483	aio_req sub;	549	aio_req sub;
484		550
485	if (grp->type != REQ_GROUP)	551	if (grp->type != EIO_GROUP)
486	return;	552	return;
487		553
488	SvREFCNT_dec (grp->fh2);	554	SvREFCNT_dec (grp->sv2);
489	grp->fh2 = 0;	555	grp->sv2 = 0;
490		556
491	for (sub = grp->grp_first; sub; sub = sub->grp_next)	557	eio_grp_cancel (grp);
492	req_cancel (sub);
493	}	558	}
494		559
495	static void req_cancel (aio_req req)	560	static void
		561	create_respipe (void)
496	{	562	{
497	req->flags |= FLAG_CANCELLED;	563	if (s_epipe_renew (&respipe))
498		564	croak ("IO::AIO: unable to initialize result pipe");
499	req_cancel_subs (req);
500	}	565	}
501		566
		567	static void poll_wait (void)
		568	{
		569	while (eio_nreqs ())
		570	{
		571	int size;
		572
		573	X_LOCK (reslock);
		574	size = res_queue.size;
		575	X_UNLOCK (reslock);
		576
		577	if (size)
		578	return;
		579
		580	etp_maybe_start_thread ();
		581
		582	s_epipe_wait (&respipe);
		583	}
		584	}
		585
502	static int poll_cb (int max)	586	static int poll_cb (void)
503	{	587	{
504	dSP;
505	int count = 0;
506	int do_croak = 0;
507	aio_req req;
508
509	for (;;)	588	for (;;)
510	{	589	{
511	while (max <= 0 || count < max)	590	int res = eio_poll ();
512	{
513	LOCK (reslock);
514	req = reqq_shift (&res_queue);
515		591
516	if (req)	592	if (res > 0)
517	{
518	if (!res_queue.size)
519	{
520	/* read any signals sent by the worker threads */
521	char buf [32];
522	while (read (respipe [0], buf, 32) == 32)
523	;
524	}
525	}
526
527	UNLOCK (reslock);
528
529	if (!req)
530	break;
531
532	--nreqs;
533
534	if (req->type == REQ_QUIT)
535	--started;
536	else if (req->type == REQ_GROUP && req->length)
537	{
538	req->fd = 1; /* mark request as delayed */
539	continue;
540	}
541	else
542	{
543	if (req->type == REQ_READ)
544	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
545
546	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
547	SvREADONLY_off (req->data);
548
549	if (req->statdata)
550	{
551	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
552	PL_laststatval = req->result;
553	PL_statcache = *(req->statdata);
554	}
555
556	req_invoke (req);
557
558	count++;
559	}
560
561	req_free (req);
562	}
563
564	if (nreqs <= max_outstanding)
565	break;	593	croak (0);
		594
		595	if (!max_outstanding || max_outstanding > eio_nreqs ())
		596	return res;
566		597
567	poll_wait ();	598	poll_wait ();
568
569	max = 0;
570	}	599	}
571
572	return count;
573	}	600	}
574		601
575	static void *aio_proc(void *arg);
576
577	static void start_thread (void)	602	static void atfork_child (void)
578	{	603	{
579	sigset_t fullsigset, oldsigset;	604	create_respipe ();
580	pthread_attr_t attr;
581
582	worker *wrk = calloc (1, sizeof (worker));
583
584	if (!wrk)
585	croak ("unable to allocate worker thread data");
586
587	pthread_attr_init (&attr);
588	pthread_attr_setstacksize (&attr, STACKSIZE);
589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
590
591	sigfillset (&fullsigset);
592
593	LOCK (wrklock);
594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
595
596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597	{
598	wrk->prev = &wrk_first;
599	wrk->next = wrk_first.next;
600	wrk_first.next->prev = wrk;
601	wrk_first.next = wrk;
602	++started;
603	}
604	else
605	free (wrk);
606
607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
608	UNLOCK (wrklock);
609	}
610
611	static void req_send (aio_req req)
612	{
613	while (started < wanted && nreqs >= started)
614	start_thread ();
615
616	++nreqs;
617
618	LOCK (reqlock);
619	reqq_push (&req_queue, req);
620	pthread_cond_signal (&reqwait);
621	UNLOCK (reqlock);
622	}
623
624	static void end_thread (void)
625	{
626	aio_req req;
627
628	Newz (0, req, 1, aio_cb);
629
630	req->type = REQ_QUIT;
631	req->pri = PRI_MAX + PRI_BIAS;
632
633	req_send (req);
634	}
635
636	static void min_parallel (int nthreads)
637	{
638	if (wanted < nthreads)
639	wanted = nthreads;
640	}
641
642	static void max_parallel (int nthreads)
643	{
644	int cur = started;
645
646	if (wanted > nthreads)
647	wanted = nthreads;
648
649	while (cur > wanted)
650	{
651	end_thread ();
652	cur--;
653	}
654
655	while (started > wanted)
656	{
657	poll_wait ();
658	poll_cb (0);
659	}
660	}
661
662	static void create_pipe ()
663	{
664	if (pipe (respipe))
665	croak ("unable to initialize result pipe");
666
667	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
668	croak ("cannot set result pipe to nonblocking mode");
669
670	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
671	croak ("cannot set result pipe to nonblocking mode");
672	}	605	}
673		606
674	/*****************************************************************************/	607	/*****************************************************************************/
675	/* work around various missing functions */
676		608
677	#if !HAVE_PREADWRITE	609	#if !_POSIX_MAPPED_FILES
678	# define pread aio_pread	610	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
679	# define pwrite aio_pwrite	611	# define munmap(addr,length) (errno = ENOSYS, -1)
680
681	/*
682	* make our pread/pwrite safe against themselves, but not against
683	* normal read/write by using a mutex. slows down execution a lot,
684	* but that's your problem, not mine.
685	*/
686	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
687
688	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
689	{
690	ssize_t res;
691	off_t ooffset;
692
693	LOCK (preadwritelock);
694	ooffset = lseek (fd, 0, SEEK_CUR);
695	lseek (fd, offset, SEEK_SET);
696	res = read (fd, buf, count);
697	lseek (fd, ooffset, SEEK_SET);
698	UNLOCK (preadwritelock);
699
700	return res;
701	}
702
703	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
704	{
705	ssize_t res;
706	off_t ooffset;
707
708	LOCK (preadwritelock);
709	ooffset = lseek (fd, 0, SEEK_CUR);
710	lseek (fd, offset, SEEK_SET);
711	res = write (fd, buf, count);
712	lseek (fd, offset, SEEK_SET);
713	UNLOCK (preadwritelock);
714
715	return res;
716	}
717	#endif
718
719	#if !HAVE_FDATASYNC
720	# define fdatasync fsync
721	#endif
722
723	#if !HAVE_READAHEAD
724	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
725
726	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
727	{
728	dBUF;
729
730	while (count > 0)
731	{
732	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
733
734	pread (fd, aio_buf, len, offset);
735	offset += len;
736	count -= len;
737	}
738
739	errno = 0;
740	}
741
742	#endif
743
744	#if !HAVE_READDIR_R
745	# define readdir_r aio_readdir_r
746
747	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
748
749	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
750	{
751	struct dirent *e;
752	int errorno;
753
754	LOCK (readdirlock);
755
756	e = readdir (dirp);
757	errorno = errno;
758
759	if (e)
760	{
761	*res = ent;
762	strcpy (ent->d_name, e->d_name);
763	}
764	else
765	*res = 0;
766
767	UNLOCK (readdirlock);
768
769	errno = errorno;
770	return e ? 0 : -1;
771	}
772	#endif
773
774	/* sendfile always needs emulation */
775	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
776	{
777	ssize_t res;
778
779	if (!count)
780	return 0;
781
782	#if HAVE_SENDFILE
783	# if __linux
784	res = sendfile (ofd, ifd, &offset, count);
785
786	# elif __freebsd
787	/*
788	* Of course, the freebsd sendfile is a dire hack with no thoughts
789	* wasted on making it similar to other I/O functions.
790	*/
791	{
792	off_t sbytes;
793	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
794
795	if (res < 0 && sbytes)
796	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
797	res = sbytes;
798	}
799
800	# elif __hpux
801	res = sendfile (ofd, ifd, offset, count, 0, 0);
802
803	# elif __solaris
804	{
805	struct sendfilevec vec;
806	size_t sbytes;
807
808	vec.sfv_fd = ifd;
809	vec.sfv_flag = 0;
810	vec.sfv_off = offset;
811	vec.sfv_len = count;
812
813	res = sendfilev (ofd, &vec, 1, &sbytes);
814
815	if (res < 0 && sbytes)
816	res = sbytes;
817	}
818
819	# endif	612	#endif
820	#else
821	res = -1;
822	errno = ENOSYS;
823	#endif
824		613
825	if (res < 0	614	#define MMAP_MAGIC PERL_MAGIC_ext
826	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
827	#if __solaris
828	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
829	#endif
830	)
831	)
832	{
833	/* emulate sendfile. this is a major pain in the ass */
834	dBUF;
835		615
836	res = 0;	616	static int
		617	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		618	{
		619	int old_errno = errno;
		620	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		621	errno = old_errno;
837		622
838	while (count)	623	mg->mg_obj = 0; /* just in case */
839	{
840	ssize_t cnt;
841
842	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
843		624
844	if (cnt <= 0)	625	SvREADONLY_off (sv);
845	{	626	SvCUR_set (sv, 0);
846	if (cnt && !res) res = -1;	627	SvLEN_set (sv, 0);
847	break;	628	SvPVX (sv) = 0;
848	}	629	SvOK_off (sv);
849		630
850	cnt = write (ofd, aio_buf, cnt);
851
852	if (cnt <= 0)
853	{
854	if (cnt && !res) res = -1;
855	break;
856	}
857
858	offset += cnt;
859	res += cnt;
860	count -= cnt;
861	}
862	}
863
864	return res;	631	return 0;
865	}	632	}
866		633
867	/* read a full directory */	634	static MGVTBL mmap_vtbl = {
868	static void scandir_ (aio_req req, worker *self)	635	0, 0, 0, 0, mmap_free
869	{	636	};
870	DIR *dirp;
871	union
872	{
873	struct dirent d;
874	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
875	} *u;
876	struct dirent *entp;
877	char *name, *names;
878	int memlen = 4096;
879	int memofs = 0;
880	int res = 0;
881	int errorno;
882
883	LOCK (wrklock);
884	self->dirp = dirp = opendir (req->dataptr);
885	self->dbuf = u = malloc (sizeof (*u));
886	req->data2ptr = names = malloc (memlen);
887	UNLOCK (wrklock);
888
889	if (dirp && u && names)
890	for (;;)
891	{
892	errno = 0;
893	readdir_r (dirp, &u->d, &entp);
894
895	if (!entp)
896	break;
897
898	name = entp->d_name;
899
900	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
901	{
902	int len = strlen (name) + 1;
903
904	res++;
905
906	while (memofs + len > memlen)
907	{
908	memlen *= 2;
909	LOCK (wrklock);
910	req->data2ptr = names = realloc (names, memlen);
911	UNLOCK (wrklock);
912
913	if (!names)
914	break;
915	}
916
917	memcpy (names + memofs, name, len);
918	memofs += len;
919	}
920	}
921
922	if (errno)
923	res = -1;
924
925	req->result = res;
926	}
927		637
928	/*****************************************************************************/	638	/*****************************************************************************/
929		639
930	static void *aio_proc (void *thr_arg)	640	static SV *
		641	get_cb (SV *cb_sv)
931	{	642	{
932	aio_req req;	643	SvGETMAGIC (cb_sv);
933	int type;	644	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
934	worker *self = (worker *)thr_arg;
935
936	do
937	{
938	LOCK (reqlock);
939
940	for (;;)
941	{
942	self->req = req = reqq_shift (&req_queue);
943
944	if (req)
945	break;
946
947	pthread_cond_wait (&reqwait, &reqlock);
948	}
949
950	UNLOCK (reqlock);
951
952	errno = 0; /* strictly unnecessary */
953	type = req->type; /* remember type for QUIT check */
954
955	if (!(req->flags & FLAG_CANCELLED))
956	switch (type)
957	{
958	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
959	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
960
961	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
962	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
963
964	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
965	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
966	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
967
968	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
969	case REQ_CLOSE: req->result = close (req->fd); break;
970	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
971	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
972	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
973	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
974	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
975
976	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
977	case REQ_FSYNC: req->result = fsync (req->fd); break;
978	case REQ_READDIR: scandir_ (req, self); break;
979
980	case REQ_BUSY:
981	{
982	struct timeval tv;
983
984	tv.tv_sec = req->fd;
985	tv.tv_usec = req->fd2;
986
987	req->result = select (0, 0, 0, 0, &tv);
988	}
989
990	case REQ_GROUP:
991	case REQ_NOP:
992	case REQ_QUIT:
993	break;
994
995	default:
996	req->result = ENOSYS;
997	break;
998	}
999
1000	req->errorno = errno;
1001
1002	LOCK (reslock);
1003
1004	if (!reqq_push (&res_queue, req))
1005	/* write a dummy byte to the pipe so fh becomes ready */
1006	write (respipe [1], &respipe, 1);
1007
1008	self->req = 0;
1009	worker_clear (self);
1010
1011	UNLOCK (reslock);
1012	}
1013	while (type != REQ_QUIT);
1014
1015	LOCK (wrklock);
1016	worker_free (self);
1017	UNLOCK (wrklock);
1018
1019	return 0;
1020	}
1021
1022	/*****************************************************************************/
1023
1024	static void atfork_prepare (void)
1025	{
1026	LOCK (wrklock);
1027	LOCK (reqlock);
1028	LOCK (reslock);
1029	#if !HAVE_PREADWRITE
1030	LOCK (preadwritelock);
1031	#endif
1032	#if !HAVE_READDIR_R
1033	LOCK (readdirlock);
1034	#endif
1035	}
1036
1037	static void atfork_parent (void)
1038	{
1039	#if !HAVE_READDIR_R
1040	UNLOCK (readdirlock);
1041	#endif
1042	#if !HAVE_PREADWRITE
1043	UNLOCK (preadwritelock);
1044	#endif
1045	UNLOCK (reslock);
1046	UNLOCK (reqlock);
1047	UNLOCK (wrklock);
1048	}
1049
1050	static void atfork_child (void)
1051	{
1052	aio_req prv;
1053
1054	while (prv = reqq_shift (&req_queue))
1055	req_free (prv);
1056
1057	while (prv = reqq_shift (&res_queue))
1058	req_free (prv);
1059
1060	while (wrk_first.next != &wrk_first)
1061	{
1062	worker *wrk = wrk_first.next;
1063
1064	if (wrk->req)
1065	req_free (wrk->req);
1066
1067	worker_clear (wrk);
1068	worker_free (wrk);
1069	}
1070
1071	started = 0;
1072	nreqs = 0;
1073
1074	close (respipe [0]);
1075	close (respipe [1]);
1076	create_pipe ();
1077
1078	atfork_parent ();
1079	}	645	}
1080		646
1081	#define dREQ \	647	#define dREQ \
		648	SV *cb_cv; \
1082	aio_req req; \	649	aio_req req; \
1083	int req_pri = next_pri; \	650	int req_pri = next_pri; \
1084	next_pri = DEFAULT_PRI + PRI_BIAS; \	651	next_pri = EIO_PRI_DEFAULT; \
1085	\	652	\
1086	if (SvOK (callback) && !SvROK (callback)) \	653	cb_cv = get_cb (callback); \
1087	croak ("callback must be undef or of reference type"); \
1088	\	654	\
1089	Newz (0, req, 1, aio_cb); \	655	Newz (0, req, 1, eio_req); \
1090	if (!req) \	656	if (!req) \
1091	croak ("out of memory during aio_req allocation"); \	657	croak ("out of memory during eio_req allocation"); \
1092	\	658	\
1093	req->callback = newSVsv (callback); \	659	req->callback = SvREFCNT_inc (cb_cv); \
1094	req->pri = req_pri	660	req->pri = req_pri
1095		661
1096	#define REQ_SEND \	662	#define REQ_SEND \
		663	PUTBACK; \
1097	req_send (req); \	664	req_submit (req); \
		665	SPAGAIN; \
1098	\	666	\
1099	if (GIMME_V != G_VOID) \	667	if (GIMME_V != G_VOID) \
1100	XPUSHs (req_sv (req, AIO_REQ_KLASS));	668	XPUSHs (req_sv (req, aio_req_stash));
1101		669
1102	MODULE = IO::AIO PACKAGE = IO::AIO	670	MODULE = IO::AIO PACKAGE = IO::AIO
1103		671
1104	PROTOTYPES: ENABLE	672	PROTOTYPES: ENABLE
1105		673
1106	BOOT:	674	BOOT:
1107	{	675	{
		676	static const struct {
		677	const char *name;
		678	IV iv;
		679	} *civ, const_iv[] = {
		680	# define const_niv(name, value) { # name, (IV) value },
		681	# define const_iv(name) { # name, (IV) name },
		682	# define const_eio(name) { # name, (IV) EIO_ ## name },
		683	const_iv (EXDEV)
		684	const_iv (ENOSYS)
		685	const_iv (O_RDONLY)
		686	const_iv (O_WRONLY)
		687	const_iv (O_RDWR)
		688	const_iv (O_CREAT)
		689	const_iv (O_TRUNC)
		690	const_iv (O_EXCL)
		691	const_iv (O_APPEND)
		692	#ifndef _WIN32
		693	const_iv (S_IFIFO)
		694	#endif
		695	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		696	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		697	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		698	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		699	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		700	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		701
		702	const_iv (ST_RDONLY)
		703	const_iv (ST_NOSUID)
		704	const_iv (ST_NODEV)
		705	const_iv (ST_NOEXEC)
		706	const_iv (ST_SYNCHRONOUS)
		707	const_iv (ST_MANDLOCK)
		708	const_iv (ST_WRITE)
		709	const_iv (ST_APPEND)
		710	const_iv (ST_IMMUTABLE)
		711	const_iv (ST_NOATIME)
		712	const_iv (ST_NODIRATIME)
		713	const_iv (ST_RELATIME)
		714
		715	const_iv (PROT_EXEC)
		716	const_iv (PROT_NONE)
		717	const_iv (PROT_READ)
		718	const_iv (PROT_WRITE)
		719
		720	/*const_iv (MAP_FIXED)*/
		721	const_iv (MAP_PRIVATE)
		722	const_iv (MAP_SHARED)
		723	const_iv (MAP_ANONYMOUS)
		724
		725	/* linuxish */
		726	const_iv (MAP_HUGETLB)
		727	const_iv (MAP_LOCKED)
		728	const_iv (MAP_NORESERVE)
		729	const_iv (MAP_POPULATE)
		730	const_iv (MAP_NONBLOCK)
		731
		732	const_iv (MCL_FUTURE)
		733	const_iv (MCL_CURRENT)
		734
		735	const_eio (MS_ASYNC)
		736	const_eio (MS_INVALIDATE)
		737	const_eio (MS_SYNC)
		738
		739	const_eio (MT_MODIFY)
		740
		741	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		742	const_eio (SYNC_FILE_RANGE_WRITE)
		743	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		744
		745	const_eio (READDIR_DENTS)
		746	const_eio (READDIR_DIRS_FIRST)
		747	const_eio (READDIR_STAT_ORDER)
		748	const_eio (READDIR_FOUND_UNKNOWN)
		749
		750	const_eio (DT_UNKNOWN)
		751	const_eio (DT_FIFO)
		752	const_eio (DT_CHR)
		753	const_eio (DT_DIR)
		754	const_eio (DT_BLK)
		755	const_eio (DT_REG)
		756	const_eio (DT_LNK)
		757	const_eio (DT_SOCK)
		758	const_eio (DT_WHT)
		759	};
		760
1108	HV *stash = gv_stashpv ("IO::AIO", 1);	761	aio_stash = gv_stashpv ("IO::AIO" , 1);
1109	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	762	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1110	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	763	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1111	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1112		764
		765	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		766	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		767
		768	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		769
1113	create_pipe ();	770	create_respipe ();
1114	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	771
		772	if (eio_init (want_poll, done_poll) < 0)
		773	croak ("IO::AIO: unable to initialise eio library");
		774
		775	/* atfork child called in fifo order, so before eio's handler */
		776	X_THREAD_ATFORK (0, 0, atfork_child);
1115	}	777	}
		778
		779	void
		780	max_poll_reqs (int nreqs)
		781	PROTOTYPE: $
		782	CODE:
		783	eio_set_max_poll_reqs (nreqs);
		784
		785	void
		786	max_poll_time (double nseconds)
		787	PROTOTYPE: $
		788	CODE:
		789	eio_set_max_poll_time (nseconds);
1116		790
1117	void	791	void
1118	min_parallel (int nthreads)	792	min_parallel (int nthreads)
1119	PROTOTYPE: $	793	PROTOTYPE: $
		794	CODE:
		795	eio_set_min_parallel (nthreads);
1120		796
1121	void	797	void
1122	max_parallel (int nthreads)	798	max_parallel (int nthreads)
1123	PROTOTYPE: $	799	PROTOTYPE: $
		800	CODE:
		801	eio_set_max_parallel (nthreads);
1124		802
1125	int	803	void
		804	max_idle (int nthreads)
		805	PROTOTYPE: $
		806	CODE:
		807	eio_set_max_idle (nthreads);
		808
		809	void
1126	max_outstanding (int maxreqs)	810	max_outstanding (int maxreqs)
1127	PROTOTYPE: $	811	PROTOTYPE: $
1128	CODE:	812	CODE:
1129	RETVAL = max_outstanding;
1130	max_outstanding = maxreqs;	813	max_outstanding = maxreqs;
1131	OUTPUT:
1132	RETVAL
1133		814
1134	void	815	void
1135	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	816	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1136	SV * pathname
1137	int flags
1138	int mode
1139	SV * callback
1140	PROTOTYPE: $$$;$	817	PROTOTYPE: $$$;$
1141	PPCODE:	818	PPCODE:
1142	{	819	{
1143	dREQ;	820	dREQ;
1144		821
1145	req->type = REQ_OPEN;	822	req->type = EIO_OPEN;
1146	req->data = newSVsv (pathname);	823	req->sv1 = newSVsv (pathname);
1147	req->dataptr = SvPVbyte_nolen (req->data);	824	req->ptr1 = SvPVbyte_nolen (req->sv1);
1148	req->fd = flags;	825	req->int1 = flags;
1149	req->mode = mode;	826	req->int2 = mode;
1150		827
1151	REQ_SEND;	828	REQ_SEND;
1152	}	829	}
1153		830
1154	void	831	void
1155	aio_close (fh,callback=&PL_sv_undef)	832	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1156	SV * fh
1157	SV * callback
1158	PROTOTYPE: $;$	833	PROTOTYPE: $;$
1159	ALIAS:	834	ALIAS:
1160	aio_close = REQ_CLOSE
1161	aio_fsync = REQ_FSYNC	835	aio_fsync = EIO_FSYNC
1162	aio_fdatasync = REQ_FDATASYNC	836	aio_fdatasync = EIO_FDATASYNC
1163	PPCODE:	837	PPCODE:
1164	{	838	{
		839	int fd = s_fileno_croak (fh, 0);
1165	dREQ;	840	dREQ;
1166		841
1167	req->type = ix;	842	req->type = ix;
1168	req->fh = newSVsv (fh);	843	req->sv1 = newSVsv (fh);
1169	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	844	req->int1 = fd;
1170		845
1171	REQ_SEND (req);	846	REQ_SEND (req);
1172	}	847	}
1173		848
1174	void	849	void
		850	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		851	PROTOTYPE: $$$$;$
		852	PPCODE:
		853	{
		854	int fd = s_fileno_croak (fh, 0);
		855	dREQ;
		856
		857	req->type = EIO_SYNC_FILE_RANGE;
		858	req->sv1 = newSVsv (fh);
		859	req->int1 = fd;
		860	req->offs = offset;
		861	req->size = nbytes;
		862	req->int2 = flags;
		863
		864	REQ_SEND (req);
		865	}
		866
		867	void
		868	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		869	PROTOTYPE: $;$
		870	PPCODE:
		871	{
		872	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		873	int fd = s_fileno_croak (fh, 0);
		874	dREQ;
		875
		876	if (close_pipe < 0)
		877	{
		878	int pipefd [2];
		879
		880	if (pipe (pipefd) < 0
		881	|| close (pipefd [1]) < 0
		882	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		883	abort (); /*D*/
		884
		885	close_pipe = pipefd [0];
		886	}
		887
		888	req->type = EIO_DUP2;
		889	req->int1 = close_pipe;
		890	req->sv2 = newSVsv (fh);
		891	req->int2 = fd;
		892
		893	REQ_SEND (req);
		894	}
		895
		896	void
1175	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	897	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	UV length
1179	SV * data
1180	UV dataoffset
1181	SV * callback
1182	ALIAS:	898	ALIAS:
1183	aio_read = REQ_READ	899	aio_read = EIO_READ
1184	aio_write = REQ_WRITE	900	aio_write = EIO_WRITE
1185	PROTOTYPE: $$$$$;$	901	PROTOTYPE: $$$$$;$
1186	PPCODE:	902	PPCODE:
1187	{	903	{
1188	aio_req req;
1189	STRLEN svlen;	904	STRLEN svlen;
		905	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1190	char *svptr = SvPVbyte (data, svlen);	906	char *svptr = SvPVbyte (data, svlen);
1191		907	UV len = SvUV (length);
1192	SvUPGRADE (data, SVt_PV);
1193	SvPOK_on (data);
1194		908
1195	if (dataoffset < 0)	909	if (dataoffset < 0)
1196	dataoffset += svlen;	910	dataoffset += svlen;
1197		911
1198	if (dataoffset < 0 || dataoffset > svlen)	912	if (dataoffset < 0 || dataoffset > svlen)
1199	croak ("data offset outside of string");	913	croak ("dataoffset outside of data scalar");
1200		914
1201	if (ix == REQ_WRITE)	915	if (ix == EIO_WRITE)
1202	{	916	{
1203	/* write: check length and adjust. */	917	/* write: check length and adjust. */
1204	if (length < 0 || length + dataoffset > svlen)	918	if (!SvOK (length) || len + dataoffset > svlen)
1205	length = svlen - dataoffset;	919	len = svlen - dataoffset;
1206	}	920	}
1207	else	921	else
1208	{	922	{
1209	/* read: grow scalar as necessary */	923	/* read: check type and grow scalar as necessary */
		924	SvUPGRADE (data, SVt_PV);
1210	svptr = SvGROW (data, length + dataoffset);	925	svptr = SvGROW (data, len + dataoffset + 1);
1211	}	926	}
1212
1213	if (length < 0)
1214	croak ("length must not be negative");
1215		927
1216	{	928	{
1217	dREQ;	929	dREQ;
1218		930
1219	req->type = ix;	931	req->type = ix;
1220	req->fh = newSVsv (fh);	932	req->sv1 = newSVsv (fh);
1221	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	933	req->int1 = fd;
1222	: IoOFP (sv_2io (fh)));	934	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1223	req->offset = offset;	935	req->size = len;
1224	req->length = length;
1225	req->data = SvREFCNT_inc (data);	936	req->sv2 = SvREFCNT_inc (data);
1226	req->dataptr = (char *)svptr + dataoffset;	937	req->ptr2 = (char *)svptr + dataoffset;
		938	req->stroffset = dataoffset;
1227		939
1228	if (!SvREADONLY (data))	940	if (!SvREADONLY (data))
1229	{	941	{
1230	SvREADONLY_on (data);	942	SvREADONLY_on (data);
1231	req->data2ptr = (void *)data;	943	req->flags |= FLAG_SV2_RO_OFF;
1232	}	944	}
1233		945
1234	REQ_SEND;	946	REQ_SEND;
1235	}	947	}
1236	}	948	}
1237		949
1238	void	950	void
		951	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		952	PROTOTYPE: $$;$
		953	PPCODE:
		954	{
		955	SV *data;
		956	dREQ;
		957
		958	req->type = EIO_READLINK;
		959	req->sv1 = newSVsv (path);
		960	req->ptr1 = SvPVbyte_nolen (req->sv1);
		961
		962	REQ_SEND;
		963	}
		964
		965	void
1239	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	966	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1240	SV * out_fh
1241	SV * in_fh
1242	UV in_offset
1243	UV length
1244	SV * callback
1245	PROTOTYPE: $$$$;$	967	PROTOTYPE: $$$$;$
1246	PPCODE:	968	PPCODE:
1247	{	969	{
		970	int ifd = s_fileno_croak (in_fh , 0);
		971	int ofd = s_fileno_croak (out_fh, 1);
1248	dREQ;	972	dREQ;
1249		973
1250	req->type = REQ_SENDFILE;	974	req->type = EIO_SENDFILE;
1251	req->fh = newSVsv (out_fh);	975	req->sv1 = newSVsv (out_fh);
1252	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	976	req->int1 = ofd;
1253	req->fh2 = newSVsv (in_fh);	977	req->sv2 = newSVsv (in_fh);
1254	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	978	req->int2 = ifd;
1255	req->offset = in_offset;	979	req->offs = in_offset;
1256	req->length = length;	980	req->size = length;
1257		981
1258	REQ_SEND;	982	REQ_SEND;
1259	}	983	}
1260		984
1261	void	985	void
1262	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	986	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1263	SV * fh
1264	UV offset
1265	IV length
1266	SV * callback
1267	PROTOTYPE: $$$;$	987	PROTOTYPE: $$$;$
1268	PPCODE:	988	PPCODE:
1269	{	989	{
		990	int fd = s_fileno_croak (fh, 0);
1270	dREQ;	991	dREQ;
1271		992
1272	req->type = REQ_READAHEAD;	993	req->type = EIO_READAHEAD;
1273	req->fh = newSVsv (fh);	994	req->sv1 = newSVsv (fh);
1274	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	995	req->int1 = fd;
1275	req->offset = offset;	996	req->offs = offset;
1276	req->length = length;	997	req->size = length;
1277		998
1278	REQ_SEND;	999	REQ_SEND;
1279	}	1000	}
1280		1001
1281	void	1002	void
1282	aio_stat (fh_or_path,callback=&PL_sv_undef)	1003	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1283	SV * fh_or_path
1284	SV * callback
1285	ALIAS:	1004	ALIAS:
1286	aio_stat = REQ_STAT	1005	aio_stat = EIO_STAT
1287	aio_lstat = REQ_LSTAT	1006	aio_lstat = EIO_LSTAT
		1007	aio_statvfs = EIO_STATVFS
1288	PPCODE:	1008	PPCODE:
1289	{	1009	{
1290	dREQ;	1010	dREQ;
1291		1011
1292	New (0, req->statdata, 1, Stat_t);	1012	req->sv1 = newSVsv (fh_or_path);
1293	if (!req->statdata)
1294	{
1295	req_free (req);
1296	croak ("out of memory during aio_req->statdata allocation");
1297	}
1298		1013
1299	if (SvPOK (fh_or_path))	1014	if (SvPOK (req->sv1))
1300	{	1015	{
1301	req->type = ix;	1016	req->type = ix;
1302	req->data = newSVsv (fh_or_path);
1303	req->dataptr = SvPVbyte_nolen (req->data);	1017	req->ptr1 = SvPVbyte_nolen (req->sv1);
1304	}	1018	}
1305	else	1019	else
1306	{	1020	{
1307	req->type = REQ_FSTAT;	1021	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1308	req->fh = newSVsv (fh_or_path);
1309	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1022	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1310	}	1023	}
1311		1024
1312	REQ_SEND;	1025	REQ_SEND;
1313	}	1026	}
1314		1027
1315	void	1028	void
		1029	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1030	PPCODE:
		1031	{
		1032	dREQ;
		1033
		1034	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1035	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1036	req->sv1 = newSVsv (fh_or_path);
		1037
		1038	if (SvPOK (req->sv1))
		1039	{
		1040	req->type = EIO_UTIME;
		1041	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1042	}
		1043	else
		1044	{
		1045	req->type = EIO_FUTIME;
		1046	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1047	}
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1054	PPCODE:
		1055	{
		1056	dREQ;
		1057
		1058	req->sv1 = newSVsv (fh_or_path);
		1059	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1060
		1061	if (SvPOK (req->sv1))
		1062	{
		1063	req->type = EIO_TRUNCATE;
		1064	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1065	}
		1066	else
		1067	{
		1068	req->type = EIO_FTRUNCATE;
		1069	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1070	}
		1071
		1072	REQ_SEND;
		1073	}
		1074
		1075	void
		1076	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1077	ALIAS:
		1078	aio_chmod = EIO_CHMOD
		1079	aio_mkdir = EIO_MKDIR
		1080	PPCODE:
		1081	{
		1082	dREQ;
		1083
		1084	req->int2 = mode;
		1085	req->sv1 = newSVsv (fh_or_path);
		1086
		1087	if (SvPOK (req->sv1))
		1088	{
		1089	req->type = ix;
		1090	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1091	}
		1092	else
		1093	{
		1094	req->type = EIO_FCHMOD;
		1095	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1096	}
		1097
		1098	REQ_SEND;
		1099	}
		1100
		1101	void
		1102	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1103	PPCODE:
		1104	{
		1105	dREQ;
		1106
		1107	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1108	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1109	req->sv1 = newSVsv (fh_or_path);
		1110
		1111	if (SvPOK (req->sv1))
		1112	{
		1113	req->type = EIO_CHOWN;
		1114	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1115	}
		1116	else
		1117	{
		1118	req->type = EIO_FCHOWN;
		1119	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1120	}
		1121
		1122	REQ_SEND;
		1123	}
		1124
		1125	void
		1126	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1127	PPCODE:
		1128	{
		1129	dREQ;
		1130
		1131	req->type = EIO_READDIR;
		1132	req->sv1 = newSVsv (pathname);
		1133	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1134	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1135
		1136	if (flags & EIO_READDIR_DENTS)
		1137	req->int1 |= EIO_READDIR_CUSTOM2;
		1138
		1139	REQ_SEND;
		1140	}
		1141
		1142	void
1316	aio_unlink (pathname,callback=&PL_sv_undef)	1143	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1317	SV * pathname
1318	SV * callback
1319	ALIAS:	1144	ALIAS:
1320	aio_unlink = REQ_UNLINK	1145	aio_unlink = EIO_UNLINK
1321	aio_rmdir = REQ_RMDIR	1146	aio_rmdir = EIO_RMDIR
1322	aio_readdir = REQ_READDIR	1147	aio_readdir = EIO_READDIR
1323	PPCODE:	1148	PPCODE:
1324	{	1149	{
1325	dREQ;	1150	dREQ;
1326		1151
1327	req->type = ix;	1152	req->type = ix;
1328	req->data = newSVsv (pathname);	1153	req->sv1 = newSVsv (pathname);
1329	req->dataptr = SvPVbyte_nolen (req->data);	1154	req->ptr1 = SvPVbyte_nolen (req->sv1);
1330		1155
1331	REQ_SEND;	1156	REQ_SEND;
1332	}	1157	}
1333		1158
1334	void	1159	void
1335	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1160	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1336	SV * oldpath
1337	SV * newpath
1338	SV * callback
1339	ALIAS:	1161	ALIAS:
1340	aio_link = REQ_LINK	1162	aio_link = EIO_LINK
1341	aio_symlink = REQ_SYMLINK	1163	aio_symlink = EIO_SYMLINK
1342	aio_rename = REQ_RENAME	1164	aio_rename = EIO_RENAME
1343	PPCODE:	1165	PPCODE:
1344	{	1166	{
1345	dREQ;	1167	dREQ;
1346		1168
1347	req->type = ix;	1169	req->type = ix;
1348	req->fh = newSVsv (oldpath);	1170	req->sv1 = newSVsv (oldpath);
1349	req->data2ptr = SvPVbyte_nolen (req->fh);	1171	req->ptr1 = SvPVbyte_nolen (req->sv1);
1350	req->data = newSVsv (newpath);	1172	req->sv2 = newSVsv (newpath);
1351	req->dataptr = SvPVbyte_nolen (req->data);	1173	req->ptr2 = SvPVbyte_nolen (req->sv2);
1352		1174
1353	REQ_SEND;	1175	REQ_SEND;
1354	}	1176	}
1355		1177
1356	void	1178	void
1357	aio_busy (delay,callback=&PL_sv_undef)	1179	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1358	double delay
1359	SV * callback
1360	PPCODE:	1180	PPCODE:
1361	{	1181	{
1362	dREQ;	1182	dREQ;
1363		1183
1364	req->type = REQ_BUSY;	1184	req->type = EIO_MKNOD;
1365	req->fd = delay < 0. ? 0 : delay;	1185	req->sv1 = newSVsv (pathname);
1366	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1186	req->ptr1 = SvPVbyte_nolen (req->sv1);
1367		1187	req->int2 = (mode_t)mode;
		1188	req->offs = dev;
		1189
1368	REQ_SEND;	1190	REQ_SEND;
1369	}	1191	}
1370		1192
1371	void	1193	void
		1194	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1195	ALIAS:
		1196	aio_mtouch = EIO_MTOUCH
		1197	aio_msync = EIO_MSYNC
		1198	PROTOTYPE: $$$$;$
		1199	PPCODE:
		1200	{
		1201	STRLEN svlen;
		1202	UV len = SvUV (length);
		1203	char *svptr = SvPVbyte (data, svlen);
		1204
		1205	if (offset < 0)
		1206	offset += svlen;
		1207
		1208	if (offset < 0 || offset > svlen)
		1209	croak ("offset outside of scalar");
		1210
		1211	if (!SvOK (length) || len + offset > svlen)
		1212	len = svlen - offset;
		1213
		1214	{
		1215	dREQ;
		1216
		1217	req->type = ix;
		1218	req->size = len;
		1219	req->sv2 = SvREFCNT_inc (data);
		1220	req->ptr2 = (char *)svptr + offset;
		1221	req->int1 = flags;
		1222
		1223	REQ_SEND;
		1224	}
		1225	}
		1226
		1227	void
		1228	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1229	PPCODE:
		1230	{
		1231	dREQ;
		1232
		1233	req->type = EIO_BUSY;
		1234	req->nv1 = delay < 0. ? 0. : delay;
		1235
		1236	REQ_SEND;
		1237	}
		1238
		1239	void
1372	aio_group (callback=&PL_sv_undef)	1240	aio_group (SV *callback=&PL_sv_undef)
1373	SV * callback
1374	PROTOTYPE: ;$	1241	PROTOTYPE: ;$
1375	PPCODE:	1242	PPCODE:
1376	{	1243	{
1377	dREQ;	1244	dREQ;
1378		1245
1379	req->type = REQ_GROUP;	1246	req->type = EIO_GROUP;
		1247
1380	req_send (req);	1248	req_submit (req);
1381
1382	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1249	XPUSHs (req_sv (req, aio_grp_stash));
1383	}	1250	}
1384		1251
1385	void	1252	void
1386	aio_nop (callback=&PL_sv_undef)	1253	aio_nop (SV *callback=&PL_sv_undef)
1387	SV * callback	1254	ALIAS:
		1255	aio_nop = EIO_NOP
		1256	aio_sync = EIO_SYNC
1388	PPCODE:	1257	PPCODE:
1389	{	1258	{
1390	dREQ;	1259	dREQ;
1391		1260
1392	req->type = REQ_NOP;	1261	req->type = ix;
1393		1262
1394	REQ_SEND;	1263	REQ_SEND;
1395	}	1264	}
1396		1265
1397	void	1266	int
1398	aioreq_pri (int pri = DEFAULT_PRI)	1267	aioreq_pri (int pri = 0)
1399	CODE:	1268	PROTOTYPE: ;$
		1269	CODE:
		1270	RETVAL = next_pri;
		1271	if (items > 0)
		1272	{
1400	if (pri < PRI_MIN) pri = PRI_MIN;	1273	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1401	if (pri > PRI_MAX) pri = PRI_MAX;	1274	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1402	next_pri = pri + PRI_BIAS;	1275	next_pri = pri;
		1276	}
		1277	OUTPUT:
		1278	RETVAL
1403		1279
1404	void	1280	void
1405	aioreq_nice (int nice = 0)	1281	aioreq_nice (int nice = 0)
1406	CODE:	1282	CODE:
1407	nice = next_pri - nice;	1283	nice = next_pri - nice;
1408	if (nice < PRI_MIN) nice = PRI_MIN;	1284	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1409	if (nice > PRI_MAX) nice = PRI_MAX;	1285	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1410	next_pri = nice + PRI_BIAS;	1286	next_pri = nice;
1411		1287
1412	void	1288	void
1413	flush ()	1289	flush ()
1414	PROTOTYPE:	1290	PROTOTYPE:
1415	CODE:	1291	CODE:
1416	while (nreqs)	1292	while (eio_nreqs ())
1417	{	1293	{
1418	poll_wait ();	1294	poll_wait ();
1419	poll_cb (0);	1295	poll_cb ();
1420	}	1296	}
1421		1297
1422	void	1298	int
1423	poll()	1299	poll()
1424	PROTOTYPE:	1300	PROTOTYPE:
1425	CODE:	1301	CODE:
1426	if (nreqs)
1427	{
1428	poll_wait ();	1302	poll_wait ();
1429	poll_cb (0);	1303	RETVAL = poll_cb ();
1430	}	1304	OUTPUT:
		1305	RETVAL
1431		1306
1432	int	1307	int
1433	poll_fileno()	1308	poll_fileno()
1434	PROTOTYPE:	1309	PROTOTYPE:
1435	CODE:	1310	CODE:
1436	RETVAL = respipe [0];	1311	RETVAL = s_epipe_fd (&respipe);
1437	OUTPUT:	1312	OUTPUT:
1438	RETVAL	1313	RETVAL
1439		1314
1440	int	1315	int
1441	poll_cb(...)	1316	poll_cb(...)
1442	PROTOTYPE:	1317	PROTOTYPE:
1443	CODE:	1318	CODE:
1444	RETVAL = poll_cb (0);	1319	RETVAL = poll_cb ();
1445	OUTPUT:	1320	OUTPUT:
1446	RETVAL	1321	RETVAL
1447		1322
1448	int
1449	poll_some(int max = 0)
1450	PROTOTYPE: $
1451	CODE:
1452	RETVAL = poll_cb (max);
1453	OUTPUT:
1454	RETVAL
1455
1456	void	1323	void
1457	poll_wait()	1324	poll_wait()
1458	PROTOTYPE:	1325	PROTOTYPE:
1459	CODE:	1326	CODE:
1460	if (nreqs)
1461	poll_wait ();	1327	poll_wait ();
1462		1328
1463	int	1329	int
1464	nreqs()	1330	nreqs()
1465	PROTOTYPE:	1331	PROTOTYPE:
1466	CODE:	1332	CODE:
1467	RETVAL = nreqs;	1333	RETVAL = eio_nreqs ();
1468	OUTPUT:	1334	OUTPUT:
1469	RETVAL	1335	RETVAL
1470		1336
		1337	int
		1338	nready()
		1339	PROTOTYPE:
		1340	CODE:
		1341	RETVAL = eio_nready ();
		1342	OUTPUT:
		1343	RETVAL
		1344
		1345	int
		1346	npending()
		1347	PROTOTYPE:
		1348	CODE:
		1349	RETVAL = eio_npending ();
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	int
		1354	nthreads()
		1355	PROTOTYPE:
		1356	CODE:
		1357	RETVAL = eio_nthreads ();
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1363	PROTOTYPE: $$$$
		1364	CODE:
		1365	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1366	RETVAL = posix_fadvise (fh, offset, length, advice);
		1367	#else
		1368	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1369	#endif
		1370	OUTPUT:
		1371	RETVAL
		1372
		1373	ssize_t
		1374	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1375	PROTOTYPE: $$$$
		1376	CODE:
		1377	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1378	OUTPUT:
		1379	RETVAL
		1380
		1381	void
		1382	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1383	PROTOTYPE: $$$$$;$
		1384	PPCODE:
		1385	sv_unmagic (scalar, MMAP_MAGIC);
		1386	{
		1387	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1388	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1389	if (addr == (void *)-1)
		1390	XSRETURN_NO;
		1391
		1392	/* we store the length in mg_obj, as namlen is I32 :/ */
		1393	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1394	->mg_obj = (SV *)length;
		1395
		1396	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1397	if (!(prot & PROT_WRITE))
		1398	SvREADONLY_on (scalar);
		1399
		1400	SvPVX (scalar) = (char *)addr;
		1401	SvCUR_set (scalar, length);
		1402	SvLEN_set (scalar, 0);
		1403	SvPOK_only (scalar);
		1404
		1405	XSRETURN_YES;
		1406	}
		1407
		1408	void
		1409	munmap (SV *scalar)
		1410	PROTOTYPE: $
		1411	CODE:
		1412	sv_unmagic (scalar, MMAP_MAGIC);
		1413
		1414	int
		1415	mlockall (int flags)
		1416	PROTOTYPE: $
		1417	CODE:
		1418	#if _POSIX_MEMLOCK
		1419	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1420	extern int mallopt (int, int);
		1421	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1422	#endif
		1423	mlockall (flags);
		1424	#else
		1425	RETVAL = -1;
		1426	errno = ENOSYS;
		1427	#endif
		1428	OUTPUT:
		1429	RETVAL
		1430
		1431	int
		1432	munlockall ()
		1433	PROTOTYPE:
		1434	CODE:
		1435	#if _POSIX_MEMLOCK
		1436	munlockall ();
		1437	#else
		1438	RETVAL = -1;
		1439	errno = ENOSYS;
		1440	#endif
		1441	OUTPUT:
		1442	RETVAL
		1443
		1444	void _on_next_submit (SV *cb)
		1445	CODE:
		1446	SvREFCNT_dec (on_next_submit);
		1447	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1448
1471	PROTOTYPES: DISABLE	1449	PROTOTYPES: DISABLE
1472		1450
1473	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1474		1452
1475	void	1453	void
1476	cancel (aio_req_ornot req)	1454	cancel (aio_req_ornot req)
1477	CODE:	1455	CODE:
1478	req_cancel (req);	1456	eio_cancel (req);
1479		1457
1480	void	1458	void
1481	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1482	CODE:	1460	PPCODE:
		1461	{
		1462	if (GIMME_V != G_VOID)
		1463	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1464
		1465	if (items > 1)
		1466	{
		1467	SV *cb_cv =get_cb (callback);
		1468
1483	SvREFCNT_dec (req->callback);	1469	SvREFCNT_dec (req->callback);
1484	req->callback = newSVsv (callback);	1470	req->callback = SvREFCNT_inc (cb_cv);
		1471	}
		1472	}
1485		1473
1486	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1474	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1487		1475
1488	void	1476	void
1489	add (aio_req grp, ...)	1477	add (aio_req grp, ...)
1490	PPCODE:	1478	PPCODE:
1491	{	1479	{
1492	int i;	1480	int i;
1493	aio_req req;
1494		1481
1495	if (grp->fd == 2)	1482	if (grp->int1 == 2)
1496	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1483	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1497		1484
1498	for (i = 1; i < items; ++i )	1485	for (i = 1; i < items; ++i )
1499	{	1486	{
		1487	aio_req req;
		1488
1500	if (GIMME_V != G_VOID)	1489	if (GIMME_V != G_VOID)
1501	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1490	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1502		1491
1503	req = SvAIO_REQ (ST (i));	1492	req = SvAIO_REQ (ST (i));
1504		1493
1505	if (req)	1494	if (req)
1506	{	1495	eio_grp_add (grp, req);
1507	++grp->length;
1508	req->grp = grp;
1509
1510	req->grp_prev = 0;
1511	req->grp_next = grp->grp_first;
1512
1513	if (grp->grp_first)
1514	grp->grp_first->grp_prev = req;
1515
1516	grp->grp_first = req;
1517	}
1518	}	1496	}
1519	}	1497	}
1520		1498
1521	void	1499	void
1522	cancel_subs (aio_req_ornot req)	1500	cancel_subs (aio_req_ornot req)
…		…
1526	void	1504	void
1527	result (aio_req grp, ...)	1505	result (aio_req grp, ...)
1528	CODE:	1506	CODE:
1529	{	1507	{
1530	int i;	1508	int i;
		1509	AV *av;
		1510
		1511	grp->errorno = errno;
		1512
1531	AV *av = newAV ();	1513	av = newAV ();
		1514	av_extend (av, items - 1);
1532		1515
1533	for (i = 1; i < items; ++i )	1516	for (i = 1; i < items; ++i )
1534	av_push (av, newSVsv (ST (i)));	1517	av_push (av, newSVsv (ST (i)));
1535		1518
1536	SvREFCNT_dec (grp->data);	1519	SvREFCNT_dec (grp->sv1);
1537	grp->data = (SV *)av;	1520	grp->sv1 = (SV *)av;
1538	}	1521	}
		1522
		1523	void
		1524	errno (aio_req grp, int errorno = errno)
		1525	CODE:
		1526	grp->errorno = errorno;
1539		1527
1540	void	1528	void
1541	limit (aio_req grp, int limit)	1529	limit (aio_req grp, int limit)
1542	CODE:	1530	CODE:
1543	grp->fd2 = limit;	1531	eio_grp_limit (grp, limit);
1544	aio_grp_feed (grp);
1545		1532
1546	void	1533	void
1547	feed (aio_req grp, SV *callback=&PL_sv_undef)	1534	feed (aio_req grp, SV *callback=&PL_sv_undef)
1548	CODE:	1535	CODE:
1549	{	1536	{
1550	SvREFCNT_dec (grp->fh2);	1537	SvREFCNT_dec (grp->sv2);
1551	grp->fh2 = newSVsv (callback);	1538	grp->sv2 = newSVsv (callback);
		1539	grp->feed = aio_grp_feed;
1552		1540
1553	if (grp->fd2 <= 0)	1541	if (grp->int2 <= 0)
1554	grp->fd2 = 2;	1542	grp->int2 = 2;
1555		1543
1556	aio_grp_feed (grp);	1544	eio_grp_limit (grp, grp->int2);
1557	}	1545	}
1558		1546

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