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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.92 by root, Wed Nov 8 01:59:59 2006 UTC vs.
Revision 1.161 by root, Sun Jan 10 20:28:43 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
34	# if __linux
35	# include <sys/sendfile.h>
36	# elif __freebsd
37	# include <sys/socket.h>
38	# include <sys/uio.h>	22	# include <sys/mman.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>
43	# else
44	# error sendfile support requested but not available
45	# endif	23	#endif
46	#endif
47		24
48	/* number of seconds after which idle threads exit */	25	/* perl namespace pollution */
49	#define IDLE_TIMEOUT 10	26	#undef VERSION
50		27
51	/* used for struct dirent, AIX doesn't provide it */	28	#ifdef _WIN32
52	#ifndef NAME_MAX
53	# define NAME_MAX 4096
54	#endif
55		29
56	#ifndef PTHREAD_STACK_MIN	30	# define EIO_STRUCT_DIRENT Direntry_t
57	/* care for broken platforms, e.g. windows */	31	# undef malloc
58	# define PTHREAD_STACK_MIN 16384	32	# undef free
59	#endif
60		33
61	#if __ia64	34	// perl overrides all those nice win32 functions
62	# define STACKSIZE 65536	35	# undef open
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	36	# undef read
64	# define STACKSIZE PTHREAD_STACK_MIN	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
65	#else	66	#else
66	# define STACKSIZE 16384
67	#endif
68		67
69	/* wether word reads are potentially non-atomic.	68	# include <sys/time.h>
70	* this is conservatice, likely most arches this runs	69	# include <sys/select.h>
71	* on have atomic word read/writes.	70	# include <unistd.h>
72	*/	71	# include <utime.h>
73	#ifndef WORDACCESS_UNSAFE	72	# include <signal.h>
74	# if __i386 || __x86_64	73	# define EIO_STRUCT_DIRENT struct dirent
75	# define WORDACCESS_UNSAFE 0	74
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif	75	#endif
79	#endif
80		76
81	/* buffer size for various temporary buffers */	77	/* perl stupidly overrides readdir and maybe others */
82	#define AIO_BUFSIZE 65536	78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
83		82
84	#define dBUF \	83	#define EIO_STRUCT_STAT Stat_t
85	char *aio_buf; \	84
86	LOCK (wrklock); \	85	/* use NV for 32 bit perls as it allows larger offsets */
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	86	#if IVSIZE >= 8
88	UNLOCK (wrklock); \	87	# define VAL64 IV
89	if (!aio_buf) \	88	# define SvVAL64 SvIV
90	return -1;	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	/*****************************************************************************/
91		108
92	typedef SV SV8; /* byte-sv, used for argument-checking */	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	static int req_invoke (eio_req *req);
		184	#define EIO_FINISH(req) req_invoke (req)
		185	static void req_destroy (eio_req *grp);
		186	#define EIO_DESTROY(req) req_destroy (req)
93		187
94	enum {	188	enum {
95	REQ_QUIT,	189	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
96	REQ_OPEN, REQ_CLOSE,
97	REQ_READ, REQ_WRITE, REQ_READAHEAD,
98	REQ_SENDFILE,
99	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
100	REQ_FSYNC, REQ_FDATASYNC,
101	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
102	REQ_MKNOD, REQ_READDIR,
103	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104	REQ_GROUP, REQ_NOP,
105	REQ_BUSY,
106	};	190	};
107		191
108	#define AIO_REQ_KLASS "IO::AIO::REQ"	192	#include "libeio/eio.c"
109	#define AIO_GRP_KLASS "IO::AIO::GRP"
110		193
111	typedef struct aio_cb
112	{
113	struct aio_cb *volatile next;
114
115	SV *callback, *fh;
116	SV *sv1, *sv2;
117	void *ptr1, *ptr2;
118	off_t offs;
119	size_t size;
120	ssize_t result;
121
122	STRLEN stroffset;
123	int type;
124	int int1, int2;
125	int errorno;
126	mode_t mode; /* open */
127
128	unsigned char flags;
129	unsigned char pri;
130
131	SV *self; /* the perl counterpart of this request, if any */
132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
133	} aio_cb;
134
135	enum {
136	FLAG_CANCELLED = 0x01, /* request was cancelled */
137	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
138	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139	};
140
141	typedef aio_cb *aio_req;	194	typedef eio_req *aio_req;
142	typedef aio_cb *aio_req_ornot;	195	typedef eio_req *aio_req_ornot;
143		196
144	enum {	197	static SV *on_next_submit;
145	PRI_MIN = -4,	198	static int next_pri = EIO_PRI_DEFAULT;
146	PRI_MAX = 4,	199	static int max_outstanding;
147		200
148	DEFAULT_PRI = 0,	201	static s_epipe respipe;
149	PRI_BIAS = -PRI_MIN,
150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151	};
152		202
153	#define AIO_TICKS ((1000000 + 1023) >> 10)
154
155	static unsigned int max_poll_time = 0;
156	static unsigned int max_poll_reqs = 0;
157
158	/* calculcate time difference in ~1/AIO_TICKS of a second */
159	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
160	{
161	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171	#else
172	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173	#endif
174
175	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178	/* worker threads management */
179	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
180
181	typedef struct worker {
182	/* locked by wrklock */
183	struct worker *prev, *next;
184
185	pthread_t tid;
186
187	/* locked by reslock, reqlock or wrklock */
188	aio_req req; /* currently processed request */
189	void *dbuf;
190	DIR *dirp;
191	} worker;
192
193	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
194
195	static void worker_clear (worker *wrk)
196	{
197	if (wrk->dirp)
198	{
199	closedir (wrk->dirp);
200	wrk->dirp = 0;
201	}
202
203	if (wrk->dbuf)
204	{
205	free (wrk->dbuf);
206	wrk->dbuf = 0;
207	}
208	}
209
210	static void worker_free (worker *wrk)
211	{
212	wrk->next->prev = wrk->prev;
213	wrk->prev->next = wrk->next;
214
215	free (wrk);
216	}
217
218	static volatile unsigned int nreqs, nready, npending;
219	static volatile unsigned int max_idle = 4;
220	static volatile unsigned int max_outstanding = 0xffffffff;
221	static int respipe [2];
222
223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
226
227	#if WORDACCESS_UNSAFE
228
229	static unsigned int get_nready ()
230	{
231	unsigned int retval;
232
233	LOCK (reqlock);
234	retval = nready;
235	UNLOCK (reqlock);
236
237	return retval;
238	}
239
240	static unsigned int get_npending ()
241	{
242	unsigned int retval;
243
244	LOCK (reslock);
245	retval = npending;
246	UNLOCK (reslock);
247
248	return retval;
249	}
250
251	static unsigned int get_nthreads ()
252	{
253	unsigned int retval;
254
255	LOCK (wrklock);
256	retval = started;
257	UNLOCK (wrklock);
258
259	return retval;
260	}
261
262	#else
263
264	# define get_nready() nready
265	# define get_npending() npending
266	# define get_nthreads() started
267
268	#endif
269
270	/*
271	* a somewhat faster data structure might be nice, but
272	* with 8 priorities this actually needs <20 insns
273	* per shift, the most expensive operation.
274	*/
275	typedef struct {
276	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
277	int size;
278	} reqq;
279
280	static reqq req_queue;
281	static reqq res_queue;
282
283	int reqq_push (reqq *q, aio_req req)
284	{
285	int pri = req->pri;
286	req->next = 0;
287
288	if (q->qe[pri])
289	{
290	q->qe[pri]->next = req;
291	q->qe[pri] = req;
292	}
293	else
294	q->qe[pri] = q->qs[pri] = req;
295
296	return q->size++;
297	}
298
299	aio_req reqq_shift (reqq *q)
300	{
301	int pri;
302
303	if (!q->size)
304	return 0;
305
306	--q->size;
307
308	for (pri = NUM_PRI; pri--; )
309	{
310	aio_req req = q->qs[pri];
311
312	if (req)
313	{
314	if (!(q->qs[pri] = req->next))
315	q->qe[pri] = 0;
316
317	return req;
318	}
319	}
320
321	abort ();
322	}
323
324	static int poll_cb ();
325	static void req_invoke (aio_req req);
326	static void req_free (aio_req req);	203	static void req_destroy (aio_req req);
327	static void req_cancel (aio_req req);	204	static void req_cancel (aio_req req);
328		205
		206	static void want_poll (void)
		207	{
		208	/* write a dummy byte to the pipe so fh becomes ready */
		209	s_epipe_signal (&respipe);
		210	}
		211
		212	static void done_poll (void)
		213	{
		214	/* read any signals sent by the worker threads */
		215	s_epipe_drain (&respipe);
		216	}
		217
329	/* must be called at most once */	218	/* must be called at most once */
330	static SV *req_sv (aio_req req, const char *klass)	219	static SV *req_sv (aio_req req, HV *stash)
331	{	220	{
332	if (!req->self)	221	if (!req->self)
333	{	222	{
334	req->self = (SV *)newHV ();	223	req->self = (SV *)newHV ();
335	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	224	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
336	}	225	}
337		226
338	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	227	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
339	}	228	}
340		229
341	static aio_req SvAIO_REQ (SV *sv)	230	static aio_req SvAIO_REQ (SV *sv)
342	{	231	{
343	MAGIC *mg;	232	MAGIC *mg;
344		233
345	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	234	if (!SvROK (sv)
		235	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		236	&& SvSTASH (SvRV (sv)) != aio_req_stash
		237	&& !sv_derived_from (sv, "IO::AIO::REQ")))
346	croak ("object of class " AIO_REQ_KLASS " expected");	238	croak ("object of class IO::AIO::REQ expected");
347		239
348	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	240	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
349		241
350	return mg ? (aio_req)mg->mg_ptr : 0;	242	return mg ? (aio_req)mg->mg_ptr : 0;
351	}	243	}
352		244
353	static void aio_grp_feed (aio_req grp)	245	static void aio_grp_feed (aio_req grp)
354	{	246	{
355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	247	if (grp->sv2 && SvOK (grp->sv2))
356	{	248	{
357	int old_len = grp->size;
358
359	if (grp->sv2 && SvOK (grp->sv2))
360	{
361	dSP;	249	dSP;
362		250
363	ENTER;	251	ENTER;
364	SAVETMPS;	252	SAVETMPS;
365	PUSHMARK (SP);	253	PUSHMARK (SP);
366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	254	XPUSHs (req_sv (grp, aio_grp_stash));
367	PUTBACK;	255	PUTBACK;
368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	256	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369	SPAGAIN;	257	SPAGAIN;
370	FREETMPS;	258	FREETMPS;
371	LEAVE;	259	LEAVE;
372	}
373
374	/* stop if no progress has been made */
375	if (old_len == grp->size)
376	{
377	SvREFCNT_dec (grp->sv2);
378	grp->sv2 = 0;
379	break;
380	}
381	}	260	}
382	}	261	}
383		262
384	static void aio_grp_dec (aio_req grp)	263	static void req_submit (eio_req *req)
385	{	264	{
386	--grp->size;	265	eio_submit (req);
387		266
388	/* call feeder, if applicable */	267	if (expect_false (on_next_submit))
389	aio_grp_feed (grp);
390
391	/* finish, if done */
392	if (!grp->size && grp->int1)
393	{	268	{
394	req_invoke (grp);	269	dSP;
395	req_free (grp);	270	SV *cb = sv_2mortal (on_next_submit);
		271
		272	on_next_submit = 0;
		273
		274	PUSHMARK (SP);
		275	PUTBACK;
		276	call_sv (cb, G_DISCARD | G_EVAL);
396	}	277	}
397	}	278	}
398		279
399	static void req_invoke (aio_req req)	280	static int req_invoke (eio_req *req)
400	{	281	{
401	dSP;	282	dSP;
402		283
403	if (req->flags & FLAG_SV1_RO_OFF)	284	if (req->flags & FLAG_SV2_RO_OFF)
404	SvREADONLY_off (req->sv1);	285	SvREADONLY_off (req->sv2);
405		286
406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	287	if (!EIO_CANCELLED (req) && req->callback)
407	{	288	{
408	ENTER;	289	ENTER;
409	SAVETMPS;	290	SAVETMPS;
410	PUSHMARK (SP);	291	PUSHMARK (SP);
411	EXTEND (SP, 1);	292	EXTEND (SP, 1);
412		293
413	switch (req->type)	294	switch (req->type)
414	{	295	{
415	case REQ_READDIR:	296	case EIO_READDIR:
416	{	297	{
417	SV *rv = &PL_sv_undef;	298	SV *rv = &PL_sv_undef;
418		299
419	if (req->result >= 0)	300	if (req->result >= 0)
420	{	301	{
421	int i;	302	int i;
422	char *buf = req->ptr2;	303	char *names = (char *)req->ptr2;
		304	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
423	AV *av = newAV ();	305	AV *av = newAV ();
424		306
425	av_extend (av, req->result - 1);	307	av_extend (av, req->result - 1);
426		308
427	for (i = 0; i < req->result; ++i)	309	for (i = 0; i < req->result; ++i)
428	{	310	{
429	SV *sv = newSVpv (buf, 0);	311	if (req->int1 & EIO_READDIR_DENTS)
		312	{
		313	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
430		314
		315	if (req->int1 & EIO_READDIR_CUSTOM2)
		316	{
		317	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		318	AV *avent = newAV ();
		319
		320	av_extend (avent, 2);
		321
		322	if (!sv_type [ent->type])
		323	{
		324	sv_type [ent->type] = newSViv (ent->type);
		325	SvREADONLY_on (sv_type [ent->type]);
		326	}
		327
		328	av_store (avent, 0, namesv);
		329	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		330	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		331
		332	av_store (av, i, newRV_noinc ((SV *)avent));
		333	}
		334	else
431	av_store (av, i, sv);	335	av_store (av, i, namesv);
		336
		337	++ent;
		338	}
		339	else
		340	{
		341	SV *name = newSVpv (names, 0);
		342	av_store (av, i, name);
432	buf += SvCUR (sv) + 1;	343	names += SvCUR (name) + 1;
		344	}
433	}	345	}
434		346
435	rv = sv_2mortal (newRV_noinc ((SV *)av));	347	rv = sv_2mortal (newRV_noinc ((SV *)av));
436	}	348	}
437		349
438	PUSHs (rv);	350	PUSHs (rv);
		351
		352	if (req->int1 & EIO_READDIR_CUSTOM1)
		353	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
439	}	354	}
440	break;	355	break;
441		356
442	case REQ_OPEN:	357	case EIO_OPEN:
443	{	358	{
444	/* convert fd to fh */	359	/* convert fd to fh */
445	SV *fh;	360	SV *fh = &PL_sv_undef;
446		361
447	PUSHs (sv_2mortal (newSViv (req->result)));	362	if (req->result >= 0)
448	PUTBACK;	363	{
449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	364	GV *gv = (GV *)sv_newmortal ();
450	SPAGAIN;	365	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		366	char sym [64];
		367	int symlen;
		368
		369	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		370	gv_init (gv, aio_stash, sym, symlen, 0);
451		371
452	fh = SvREFCNT_inc (POPs);	372	symlen = snprintf (
		373	sym,
		374	sizeof (sym),
		375	"%s&=%d",
		376	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		377	(int)req->result
		378	);
453		379
		380	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		381	fh = (SV *)gv;
		382	}
		383
454	PUSHMARK (SP);	384	PUSHs (fh);
455	XPUSHs (sv_2mortal (fh));
456	}	385	}
457	break;	386	break;
458		387
		388	case EIO_STATVFS:
		389	case EIO_FSTATVFS:
		390	{
		391	SV *rv = &PL_sv_undef;
		392
		393	if (req->result >= 0)
		394	{
		395	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		396	HV *hv = newHV ();
		397
		398	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		399
		400	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		401	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		402	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		403	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		404	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		405	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		406	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		407	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		408	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		409	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		410	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		411	}
		412
		413	PUSHs (rv);
		414	}
		415
		416	break;
		417
459	case REQ_GROUP:	418	case EIO_GROUP:
460	req->int1 = 2; /* mark group as finished */	419	req->int1 = 2; /* mark group as finished */
461		420
462	if (req->sv1)	421	if (req->sv1)
463	{	422	{
464	int i;	423	int i;
…		…
468	for (i = 0; i <= AvFILL (av); ++i)	427	for (i = 0; i <= AvFILL (av); ++i)
469	PUSHs (*av_fetch (av, i, 0));	428	PUSHs (*av_fetch (av, i, 0));
470	}	429	}
471	break;	430	break;
472		431
473	case REQ_NOP:	432	case EIO_NOP:
474	case REQ_BUSY:	433	case EIO_BUSY:
475	break;	434	break;
476		435
477	case REQ_READLINK:	436	case EIO_READLINK:
478	if (req->result > 0)	437	if (req->result > 0)
479	{	438	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
480	SvCUR_set (req->sv1, req->result);
481	*SvEND (req->sv1) = 0;
482	PUSHs (req->sv1);
483	}
484	break;	439	break;
485		440
486	case REQ_STAT:	441	case EIO_STAT:
487	case REQ_LSTAT:	442	case EIO_LSTAT:
488	case REQ_FSTAT:	443	case EIO_FSTAT:
489	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	444	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
490	PL_laststatval = req->result;	445	PL_laststatval = req->result;
491	PL_statcache = *(Stat_t *)(req->ptr2);	446	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
492	PUSHs (sv_2mortal (newSViv (req->result)));	447	PUSHs (sv_2mortal (newSViv (req->result)));
493	break;	448	break;
494		449
495	case REQ_READ:	450	case EIO_READ:
		451	{
496	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	452	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
497	*SvEND (req->sv1) = 0;	453	*SvEND (req->sv2) = 0;
		454	SvPOK_only (req->sv2);
		455	SvSETMAGIC (req->sv2);
498	PUSHs (sv_2mortal (newSViv (req->result)));	456	PUSHs (sv_2mortal (newSViv (req->result)));
		457	}
499	break;	458	break;
		459
		460	case EIO_DUP2:
		461	if (req->result > 0)
		462	req->result = 0;
		463	/* FALLTHROUGH */
500		464
501	default:	465	default:
502	PUSHs (sv_2mortal (newSViv (req->result)));	466	PUSHs (sv_2mortal (newSViv (req->result)));
503	break;	467	break;
504	}	468	}
505		469
506	errno = req->errorno;	470	errno = req->errorno;
507		471
508	PUTBACK;	472	PUTBACK;
509	call_sv (req->callback, G_VOID | G_EVAL);	473	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
510	SPAGAIN;	474	SPAGAIN;
511		475
512	FREETMPS;	476	FREETMPS;
513	LEAVE;	477	LEAVE;
		478
		479	PUTBACK;
514	}	480	}
515		481
516	if (req->grp)	482	return !!SvTRUE (ERRSV);
517	{
518	aio_req grp = req->grp;
519
520	/* unlink request */
521	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
522	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
523
524	if (grp->grp_first == req)
525	grp->grp_first = req->grp_next;
526
527	aio_grp_dec (grp);
528	}
529
530	if (SvTRUE (ERRSV))
531	{
532	req_free (req);
533	croak (0);
534	}
535	}	483	}
536		484
537	static void req_free (aio_req req)	485	static void req_destroy (aio_req req)
538	{	486	{
539	if (req->self)	487	if (req->self)
540	{	488	{
541	sv_unmagic (req->self, PERL_MAGIC_ext);	489	sv_unmagic (req->self, PERL_MAGIC_ext);
542	SvREFCNT_dec (req->self);	490	SvREFCNT_dec (req->self);
543	}	491	}
544		492
545	SvREFCNT_dec (req->fh);
546	SvREFCNT_dec (req->sv1);	493	SvREFCNT_dec (req->sv1);
547	SvREFCNT_dec (req->sv2);	494	SvREFCNT_dec (req->sv2);
548	SvREFCNT_dec (req->callback);	495	SvREFCNT_dec (req->callback);
549		496
550	if (req->flags & FLAG_PTR2_FREE)
551	free (req->ptr2);
552
553	Safefree (req);	497	Safefree (req);
554	}	498	}
555		499
556	static void req_cancel_subs (aio_req grp)	500	static void req_cancel_subs (aio_req grp)
557	{	501	{
558	aio_req sub;	502	aio_req sub;
559		503
560	if (grp->type != REQ_GROUP)	504	if (grp->type != EIO_GROUP)
561	return;	505	return;
562		506
563	SvREFCNT_dec (grp->sv2);	507	SvREFCNT_dec (grp->sv2);
564	grp->sv2 = 0;	508	grp->sv2 = 0;
565		509
566	for (sub = grp->grp_first; sub; sub = sub->grp_next)	510	eio_grp_cancel (grp);
567	req_cancel (sub);
568	}	511	}
569		512
570	static void req_cancel (aio_req req)	513	static void
		514	create_respipe (void)
571	{	515	{
572	req->flags |= FLAG_CANCELLED;	516	if (s_epipe_renew (&respipe))
573		517	croak ("IO::AIO: unable to initialize result pipe");
574	req_cancel_subs (req);
575	}	518	}
576		519
577	static void *aio_proc(void *arg);
578
579	static void start_thread (void)
580	{
581	sigset_t fullsigset, oldsigset;
582	pthread_attr_t attr;
583
584	worker *wrk = calloc (1, sizeof (worker));
585
586	if (!wrk)
587	croak ("unable to allocate worker thread data");
588
589	pthread_attr_init (&attr);
590	pthread_attr_setstacksize (&attr, STACKSIZE);
591	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
592	#ifdef PTHREAD_SCOPE_PROCESS
593	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
594	#endif
595
596	sigfillset (&fullsigset);
597
598	LOCK (wrklock);
599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
600
601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
602	{
603	wrk->prev = &wrk_first;
604	wrk->next = wrk_first.next;
605	wrk_first.next->prev = wrk;
606	wrk_first.next = wrk;
607	++started;
608	}
609	else
610	free (wrk);
611
612	sigprocmask (SIG_SETMASK, &oldsigset, 0);
613	UNLOCK (wrklock);
614	}
615
616	static void maybe_start_thread ()
617	{
618	if (get_nthreads () >= wanted)
619	return;
620
621	/* todo: maybe use idle here, but might be less exact */
622	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
623	return;
624
625	start_thread ();
626	}
627
628	static void req_send (aio_req req)
629	{
630	++nreqs;
631
632	LOCK (reqlock);
633	++nready;
634	reqq_push (&req_queue, req);
635	pthread_cond_signal (&reqwait);
636	UNLOCK (reqlock);
637
638	maybe_start_thread ();
639	}
640
641	static void end_thread (void)
642	{
643	aio_req req;
644
645	Newz (0, req, 1, aio_cb);
646
647	req->type = REQ_QUIT;
648	req->pri = PRI_MAX + PRI_BIAS;
649
650	LOCK (reqlock);
651	reqq_push (&req_queue, req);
652	pthread_cond_signal (&reqwait);
653	UNLOCK (reqlock);
654
655	LOCK (wrklock);
656	--started;
657	UNLOCK (wrklock);
658	}
659
660	static void set_max_idle (int nthreads)
661	{
662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
663	max_idle = nthreads <= 0 ? 1 : nthreads;
664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
665	}
666
667	static void min_parallel (int nthreads)
668	{
669	if (wanted < nthreads)
670	wanted = nthreads;
671	}
672
673	static void max_parallel (int nthreads)
674	{
675	if (wanted > nthreads)
676	wanted = nthreads;
677
678	while (started > wanted)
679	end_thread ();
680	}
681
682	static void poll_wait ()	520	static void poll_wait (void)
683	{	521	{
684	fd_set rfd;
685
686	while (nreqs)	522	while (eio_nreqs ())
687	{	523	{
688	int size;	524	int size;
689	if (WORDACCESS_UNSAFE) LOCK (reslock);	525
		526	X_LOCK (reslock);
690	size = res_queue.size;	527	size = res_queue.size;
691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	528	X_UNLOCK (reslock);
692		529
693	if (size)	530	if (size)
694	return;	531	return;
695		532
696	maybe_start_thread ();	533	etp_maybe_start_thread ();
697		534
698	FD_ZERO(&rfd);	535	s_epipe_wait (&respipe);
699	FD_SET(respipe [0], &rfd);
700
701	select (respipe [0] + 1, &rfd, 0, 0, 0);
702	}	536	}
703	}	537	}
704		538
705	static int poll_cb ()	539	static int poll_cb (void)
706	{	540	{
707	dSP;
708	int count = 0;
709	int maxreqs = max_poll_reqs;
710	int do_croak = 0;
711	struct timeval tv_start, tv_now;
712	aio_req req;
713
714	if (max_poll_time)
715	gettimeofday (&tv_start, 0);
716
717	for (;;)	541	for (;;)
718	{	542	{
719	for (;;)	543	int res = eio_poll ();
720	{
721	maybe_start_thread ();
722		544
723	LOCK (reslock);	545	if (res > 0)
724	req = reqq_shift (&res_queue);
725
726	if (req)
727	{
728	--npending;
729
730	if (!res_queue.size)
731	{
732	/* read any signals sent by the worker threads */
733	char buf [32];
734	while (read (respipe [0], buf, 32) == 32)
735	;
736	}
737	}
738
739	UNLOCK (reslock);
740
741	if (!req)
742	break;
743
744	--nreqs;
745
746	if (req->type == REQ_GROUP && req->size)
747	{
748	req->int1 = 1; /* mark request as delayed */
749	continue;
750	}
751	else
752	{
753	req_invoke (req);
754
755	count++;
756	}
757
758	req_free (req);
759
760	if (maxreqs && !--maxreqs)
761	break;
762
763	if (max_poll_time)
764	{
765	gettimeofday (&tv_now, 0);
766
767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
768	break;
769	}
770	}
771
772	if (nreqs <= max_outstanding)
773	break;	546	croak (0);
		547
		548	if (!max_outstanding || max_outstanding > eio_nreqs ())
		549	return res;
774		550
775	poll_wait ();	551	poll_wait ();
776
777	++maxreqs;
778	}	552	}
779
780	return count;
781	}
782
783	static void create_pipe ()
784	{
785	if (pipe (respipe))
786	croak ("unable to initialize result pipe");
787
788	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790
791	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
792	croak ("cannot set result pipe to nonblocking mode");
793	}
794
795	/*****************************************************************************/
796	/* work around various missing functions */
797
798	#if !HAVE_PREADWRITE
799	# define pread aio_pread
800	# define pwrite aio_pwrite
801
802	/*
803	* make our pread/pwrite safe against themselves, but not against
804	* normal read/write by using a mutex. slows down execution a lot,
805	* but that's your problem, not mine.
806	*/
807	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
808
809	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
810	{
811	ssize_t res;
812	off_t ooffset;
813
814	LOCK (preadwritelock);
815	ooffset = lseek (fd, 0, SEEK_CUR);
816	lseek (fd, offset, SEEK_SET);
817	res = read (fd, buf, count);
818	lseek (fd, ooffset, SEEK_SET);
819	UNLOCK (preadwritelock);
820
821	return res;
822	}
823
824	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
825	{
826	ssize_t res;
827	off_t ooffset;
828
829	LOCK (preadwritelock);
830	ooffset = lseek (fd, 0, SEEK_CUR);
831	lseek (fd, offset, SEEK_SET);
832	res = write (fd, buf, count);
833	lseek (fd, offset, SEEK_SET);
834	UNLOCK (preadwritelock);
835
836	return res;
837	}
838	#endif
839
840	#if !HAVE_FDATASYNC
841	# define fdatasync fsync
842	#endif
843
844	#if !HAVE_READAHEAD
845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
846
847	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
848	{
849	dBUF;
850
851	while (count > 0)
852	{
853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
854
855	pread (fd, aio_buf, len, offset);
856	offset += len;
857	count -= len;
858	}
859
860	errno = 0;
861	}
862
863	#endif
864
865	#if !HAVE_READDIR_R
866	# define readdir_r aio_readdir_r
867
868	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
869
870	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
871	{
872	struct dirent *e;
873	int errorno;
874
875	LOCK (readdirlock);
876
877	e = readdir (dirp);
878	errorno = errno;
879
880	if (e)
881	{
882	*res = ent;
883	strcpy (ent->d_name, e->d_name);
884	}
885	else
886	*res = 0;
887
888	UNLOCK (readdirlock);
889
890	errno = errorno;
891	return e ? 0 : -1;
892	}
893	#endif
894
895	/* sendfile always needs emulation */
896	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
897	{
898	ssize_t res;
899
900	if (!count)
901	return 0;
902
903	#if HAVE_SENDFILE
904	# if __linux
905	res = sendfile (ofd, ifd, &offset, count);
906
907	# elif __freebsd
908	/*
909	* Of course, the freebsd sendfile is a dire hack with no thoughts
910	* wasted on making it similar to other I/O functions.
911	*/
912	{
913	off_t sbytes;
914	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
915
916	if (res < 0 && sbytes)
917	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
918	res = sbytes;
919	}
920
921	# elif __hpux
922	res = sendfile (ofd, ifd, offset, count, 0, 0);
923
924	# elif __solaris
925	{
926	struct sendfilevec vec;
927	size_t sbytes;
928
929	vec.sfv_fd = ifd;
930	vec.sfv_flag = 0;
931	vec.sfv_off = offset;
932	vec.sfv_len = count;
933
934	res = sendfilev (ofd, &vec, 1, &sbytes);
935
936	if (res < 0 && sbytes)
937	res = sbytes;
938	}
939
940	# endif
941	#else
942	res = -1;
943	errno = ENOSYS;
944	#endif
945
946	if (res < 0
947	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
948	#if __solaris
949	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
950	#endif
951	)
952	)
953	{
954	/* emulate sendfile. this is a major pain in the ass */
955	dBUF;
956
957	res = 0;
958
959	while (count)
960	{
961	ssize_t cnt;
962
963	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
964
965	if (cnt <= 0)
966	{
967	if (cnt && !res) res = -1;
968	break;
969	}
970
971	cnt = write (ofd, aio_buf, cnt);
972
973	if (cnt <= 0)
974	{
975	if (cnt && !res) res = -1;
976	break;
977	}
978
979	offset += cnt;
980	res += cnt;
981	count -= cnt;
982	}
983	}
984
985	return res;
986	}
987
988	/* read a full directory */
989	static void scandir_ (aio_req req, worker *self)
990	{
991	DIR *dirp;
992	union
993	{
994	struct dirent d;
995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
996	} *u;
997	struct dirent *entp;
998	char *name, *names;
999	int memlen = 4096;
1000	int memofs = 0;
1001	int res = 0;
1002	int errorno;
1003
1004	LOCK (wrklock);
1005	self->dirp = dirp = opendir (req->ptr1);
1006	self->dbuf = u = malloc (sizeof (*u));
1007	req->flags |= FLAG_PTR2_FREE;
1008	req->ptr2 = names = malloc (memlen);
1009	UNLOCK (wrklock);
1010
1011	if (dirp && u && names)
1012	for (;;)
1013	{
1014	errno = 0;
1015	readdir_r (dirp, &u->d, &entp);
1016
1017	if (!entp)
1018	break;
1019
1020	name = entp->d_name;
1021
1022	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1023	{
1024	int len = strlen (name) + 1;
1025
1026	res++;
1027
1028	while (memofs + len > memlen)
1029	{
1030	memlen *= 2;
1031	LOCK (wrklock);
1032	req->ptr2 = names = realloc (names, memlen);
1033	UNLOCK (wrklock);
1034
1035	if (!names)
1036	break;
1037	}
1038
1039	memcpy (names + memofs, name, len);
1040	memofs += len;
1041	}
1042	}
1043
1044	if (errno)
1045	res = -1;
1046
1047	req->result = res;
1048	}
1049
1050	/*****************************************************************************/
1051
1052	static void *aio_proc (void *thr_arg)
1053	{
1054	aio_req req;
1055	struct timespec ts;
1056	worker *self = (worker *)thr_arg;
1057
1058	/* try to distribute timeouts somewhat evenly */
1059	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1060	* (1000000000UL / 1024UL);
1061
1062	for (;;)
1063	{
1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1065
1066	LOCK (reqlock);
1067
1068	for (;;)
1069	{
1070	self->req = req = reqq_shift (&req_queue);
1071
1072	if (req)
1073	break;
1074
1075	++idle;
1076
1077	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1078	== ETIMEDOUT)
1079	{
1080	if (idle > max_idle)
1081	{
1082	--idle;
1083	UNLOCK (reqlock);
1084	LOCK (wrklock);
1085	--started;
1086	UNLOCK (wrklock);
1087	goto quit;
1088	}
1089
1090	/* we are allowed to idle, so do so without any timeout */
1091	pthread_cond_wait (&reqwait, &reqlock);
1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1093	}
1094
1095	--idle;
1096	}
1097
1098	--nready;
1099
1100	UNLOCK (reqlock);
1101
1102	errno = 0; /* strictly unnecessary */
1103
1104	if (!(req->flags & FLAG_CANCELLED))
1105	switch (req->type)
1106	{
1107	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1108	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1109
1110	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1111	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1112
1113	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1114	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1115	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1116
1117	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1118	case REQ_CLOSE: req->result = close (req->int1); break;
1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1123	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1124	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1125	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1126
1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1128	case REQ_FSYNC: req->result = fsync (req->int1); break;
1129	case REQ_READDIR: scandir_ (req, self); break;
1130
1131	case REQ_BUSY:
1132	{
1133	struct timeval tv;
1134
1135	tv.tv_sec = req->int1;
1136	tv.tv_usec = req->int2;
1137
1138	req->result = select (0, 0, 0, 0, &tv);
1139	}
1140
1141	case REQ_GROUP:
1142	case REQ_NOP:
1143	break;
1144
1145	case REQ_QUIT:
1146	goto quit;
1147
1148	default:
1149	req->result = ENOSYS;
1150	break;
1151	}
1152
1153	req->errorno = errno;
1154
1155	LOCK (reslock);
1156
1157	++npending;
1158
1159	if (!reqq_push (&res_queue, req))
1160	/* write a dummy byte to the pipe so fh becomes ready */
1161	write (respipe [1], &respipe, 1);
1162
1163	self->req = 0;
1164	worker_clear (self);
1165
1166	UNLOCK (reslock);
1167	}
1168
1169	quit:
1170	LOCK (wrklock);
1171	worker_free (self);
1172	UNLOCK (wrklock);
1173
1174	return 0;
1175	}
1176
1177	/*****************************************************************************/
1178
1179	static void atfork_prepare (void)
1180	{
1181	LOCK (wrklock);
1182	LOCK (reqlock);
1183	LOCK (reslock);
1184	#if !HAVE_PREADWRITE
1185	LOCK (preadwritelock);
1186	#endif
1187	#if !HAVE_READDIR_R
1188	LOCK (readdirlock);
1189	#endif
1190	}
1191
1192	static void atfork_parent (void)
1193	{
1194	#if !HAVE_READDIR_R
1195	UNLOCK (readdirlock);
1196	#endif
1197	#if !HAVE_PREADWRITE
1198	UNLOCK (preadwritelock);
1199	#endif
1200	UNLOCK (reslock);
1201	UNLOCK (reqlock);
1202	UNLOCK (wrklock);
1203	}	553	}
1204		554
1205	static void atfork_child (void)	555	static void atfork_child (void)
1206	{	556	{
1207	aio_req prv;
1208
1209	while (prv = reqq_shift (&req_queue))
1210	req_free (prv);
1211
1212	while (prv = reqq_shift (&res_queue))
1213	req_free (prv);
1214
1215	while (wrk_first.next != &wrk_first)
1216	{
1217	worker *wrk = wrk_first.next;
1218
1219	if (wrk->req)
1220	req_free (wrk->req);
1221
1222	worker_clear (wrk);
1223	worker_free (wrk);
1224	}
1225
1226	started = 0;
1227	idle = 0;
1228	nreqs = 0;
1229	nready = 0;
1230	npending = 0;
1231
1232	close (respipe [0]);
1233	close (respipe [1]);
1234	create_pipe ();	557	create_respipe ();
		558	}
1235		559
1236	atfork_parent ();	560	static SV *
		561	get_cb (SV *cb_sv)
		562	{
		563	SvGETMAGIC (cb_sv);
		564	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1237	}	565	}
1238		566
1239	#define dREQ \	567	#define dREQ \
		568	SV *cb_cv; \
1240	aio_req req; \	569	aio_req req; \
1241	int req_pri = next_pri; \	570	int req_pri = next_pri; \
1242	next_pri = DEFAULT_PRI + PRI_BIAS; \	571	next_pri = EIO_PRI_DEFAULT; \
1243	\	572	\
1244	if (SvOK (callback) && !SvROK (callback)) \	573	cb_cv = get_cb (callback); \
1245	croak ("callback must be undef or of reference type"); \
1246	\	574	\
1247	Newz (0, req, 1, aio_cb); \	575	Newz (0, req, 1, eio_req); \
1248	if (!req) \	576	if (!req) \
1249	croak ("out of memory during aio_req allocation"); \	577	croak ("out of memory during eio_req allocation"); \
1250	\	578	\
1251	req->callback = newSVsv (callback); \	579	req->callback = SvREFCNT_inc (cb_cv); \
1252	req->pri = req_pri	580	req->pri = req_pri
1253		581
1254	#define REQ_SEND \	582	#define REQ_SEND \
		583	PUTBACK; \
1255	req_send (req); \	584	req_submit (req); \
		585	SPAGAIN; \
1256	\	586	\
1257	if (GIMME_V != G_VOID) \	587	if (GIMME_V != G_VOID) \
1258	XPUSHs (req_sv (req, AIO_REQ_KLASS));	588	XPUSHs (req_sv (req, aio_req_stash));
1259		589
1260	MODULE = IO::AIO PACKAGE = IO::AIO	590	MODULE = IO::AIO PACKAGE = IO::AIO
1261		591
1262	PROTOTYPES: ENABLE	592	PROTOTYPES: ENABLE
1263		593
1264	BOOT:	594	BOOT:
1265	{	595	{
		596	static const struct {
		597	const char *name;
		598	IV iv;
		599	} *civ, const_iv[] = {
		600	# define const_iv(name, value) { # name, (IV) value },
		601	# define const_eio(name) { # name, (IV) EIO_ ## name },
		602	const_iv (EXDEV , EXDEV)
		603	const_iv (ENOSYS , ENOSYS)
		604	const_iv (O_RDONLY, O_RDONLY)
		605	const_iv (O_WRONLY, O_WRONLY)
		606	const_iv (O_CREAT , O_CREAT)
		607	const_iv (O_TRUNC , O_TRUNC)
		608	#ifndef _WIN32
		609	const_iv (S_IFIFO , S_IFIFO)
		610	#endif
		611	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		612	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		613	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		614	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		615	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		616	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		617
		618	const_iv (ST_RDONLY , ST_RDONLY)
		619	const_iv (ST_NOSUID , ST_NOSUID)
		620	const_iv (ST_NODEV , ST_NODEV)
		621	const_iv (ST_NOEXEC , ST_NOEXEC)
		622	const_iv (ST_SYNCHRONOUS , ST_SYNCHRONOUS)
		623	const_iv (ST_MANDLOCK , ST_MANDLOCK)
		624	const_iv (ST_WRITE , ST_WRITE)
		625	const_iv (ST_APPEND , ST_APPEND)
		626	const_iv (ST_IMMUTABLE , ST_IMMUTABLE)
		627	const_iv (ST_NOATIME , ST_NOATIME)
		628	const_iv (ST_NODIRATIME , ST_NODIRATIME)
		629	const_iv (ST_RELATIME , ST_RELATIME)
		630
		631	const_iv (MCL_FUTURE , MCL_FUTURE)
		632	const_iv (MCL_CURRENT , MCL_CURRENT)
		633
		634	const_eio (MS_ASYNC)
		635	const_eio (MS_INVALIDATE)
		636	const_eio (MS_SYNC)
		637
		638	const_eio (MT_MODIFY)
		639
		640	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		641	const_eio (SYNC_FILE_RANGE_WRITE)
		642	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		643
		644	const_eio (READDIR_DENTS)
		645	const_eio (READDIR_DIRS_FIRST)
		646	const_eio (READDIR_STAT_ORDER)
		647	const_eio (READDIR_FOUND_UNKNOWN)
		648
		649	const_eio (DT_UNKNOWN)
		650	const_eio (DT_FIFO)
		651	const_eio (DT_CHR)
		652	const_eio (DT_DIR)
		653	const_eio (DT_BLK)
		654	const_eio (DT_REG)
		655	const_eio (DT_LNK)
		656	const_eio (DT_SOCK)
		657	const_eio (DT_WHT)
		658	};
		659
1266	HV *stash = gv_stashpv ("IO::AIO", 1);	660	aio_stash = gv_stashpv ("IO::AIO" , 1);
		661	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		662	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1267		663
1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	664	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	665	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1270	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1271	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1272	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1273	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1274		666
1275	create_pipe ();	667	create_respipe ();
1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	668
		669	if (eio_init (want_poll, done_poll) < 0)
		670	croak ("IO::AIO: unable to initialise eio library");
		671
		672	/* atfork child called in fifo order, so before eio's handler */
		673	X_THREAD_ATFORK (0, 0, atfork_child);
1277	}	674	}
1278		675
1279	void	676	void
1280	max_poll_reqs (int nreqs)	677	max_poll_reqs (int nreqs)
1281	PROTOTYPE: $	678	PROTOTYPE: $
1282	CODE:	679	CODE:
1283	max_poll_reqs = nreqs;	680	eio_set_max_poll_reqs (nreqs);
1284		681
1285	void	682	void
1286	max_poll_time (double nseconds)	683	max_poll_time (double nseconds)
1287	PROTOTYPE: $	684	PROTOTYPE: $
1288	CODE:	685	CODE:
1289	max_poll_time = nseconds * AIO_TICKS;	686	eio_set_max_poll_time (nseconds);
1290		687
1291	void	688	void
1292	min_parallel (int nthreads)	689	min_parallel (int nthreads)
1293	PROTOTYPE: $	690	PROTOTYPE: $
		691	CODE:
		692	eio_set_min_parallel (nthreads);
1294		693
1295	void	694	void
1296	max_parallel (int nthreads)	695	max_parallel (int nthreads)
1297	PROTOTYPE: $	696	PROTOTYPE: $
		697	CODE:
		698	eio_set_max_parallel (nthreads);
1298		699
1299	void	700	void
1300	max_idle (int nthreads)	701	max_idle (int nthreads)
1301	PROTOTYPE: $	702	PROTOTYPE: $
1302	CODE:	703	CODE:
1303	set_max_idle (nthreads);	704	eio_set_max_idle (nthreads);
1304		705
1305	int	706	void
1306	max_outstanding (int maxreqs)	707	max_outstanding (int maxreqs)
1307	PROTOTYPE: $	708	PROTOTYPE: $
1308	CODE:	709	CODE:
1309	RETVAL = max_outstanding;
1310	max_outstanding = maxreqs;	710	max_outstanding = maxreqs;
1311	OUTPUT:
1312	RETVAL
1313		711
1314	void	712	void
1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	713	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1316	SV8 * pathname
1317	int flags
1318	int mode
1319	SV * callback
1320	PROTOTYPE: $$$;$	714	PROTOTYPE: $$$;$
1321	PPCODE:	715	PPCODE:
1322	{	716	{
1323	dREQ;	717	dREQ;
1324		718
1325	req->type = REQ_OPEN;	719	req->type = EIO_OPEN;
1326	req->sv1 = newSVsv (pathname);	720	req->sv1 = newSVsv (pathname);
1327	req->ptr1 = SvPVbyte_nolen (req->sv1);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
1328	req->int1 = flags;	722	req->int1 = flags;
1329	req->mode = mode;	723	req->int2 = mode;
1330		724
1331	REQ_SEND;	725	REQ_SEND;
1332	}	726	}
1333		727
1334	void	728	void
1335	aio_close (fh,callback=&PL_sv_undef)	729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1336	SV * fh
1337	SV * callback
1338	PROTOTYPE: $;$	730	PROTOTYPE: $;$
1339	ALIAS:	731	ALIAS:
1340	aio_close = REQ_CLOSE
1341	aio_fsync = REQ_FSYNC	732	aio_fsync = EIO_FSYNC
1342	aio_fdatasync = REQ_FDATASYNC	733	aio_fdatasync = EIO_FDATASYNC
1343	PPCODE:	734	PPCODE:
1344	{	735	{
		736	int fd = s_fileno_croak (fh, 0);
1345	dREQ;	737	dREQ;
1346		738
1347	req->type = ix;	739	req->type = ix;
1348	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	741	req->int1 = fd;
1350		742
1351	REQ_SEND (req);	743	REQ_SEND (req);
1352	}	744	}
1353		745
1354	void	746	void
		747	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		748	PROTOTYPE: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1356	SV * fh
1357	UV offset
1358	UV length
1359	SV8 * data
1360	UV dataoffset
1361	SV * callback
1362	ALIAS:	795	ALIAS:
1363	aio_read = REQ_READ	796	aio_read = EIO_READ
1364	aio_write = REQ_WRITE	797	aio_write = EIO_WRITE
1365	PROTOTYPE: $$$$$;$	798	PROTOTYPE: $$$$$;$
1366	PPCODE:	799	PPCODE:
1367	{	800	{
1368	STRLEN svlen;	801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1369	char *svptr = SvPVbyte (data, svlen);	803	char *svptr = SvPVbyte (data, svlen);
1370		804	UV len = SvUV (length);
1371	SvUPGRADE (data, SVt_PV);
1372	SvPOK_on (data);
1373		805
1374	if (dataoffset < 0)	806	if (dataoffset < 0)
1375	dataoffset += svlen;	807	dataoffset += svlen;
1376		808
1377	if (dataoffset < 0 || dataoffset > svlen)	809	if (dataoffset < 0 || dataoffset > svlen)
1378	croak ("data offset outside of string");	810	croak ("dataoffset outside of data scalar");
1379		811
1380	if (ix == REQ_WRITE)	812	if (ix == EIO_WRITE)
1381	{	813	{
1382	/* write: check length and adjust. */	814	/* write: check length and adjust. */
1383	if (length < 0 || length + dataoffset > svlen)	815	if (!SvOK (length) || len + dataoffset > svlen)
1384	length = svlen - dataoffset;	816	len = svlen - dataoffset;
1385	}	817	}
1386	else	818	else
1387	{	819	{
1388	/* read: grow scalar as necessary */	820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
1389	svptr = SvGROW (data, length + dataoffset);	822	svptr = SvGROW (data, len + dataoffset + 1);
1390	}	823	}
1391
1392	if (length < 0)
1393	croak ("length must not be negative");
1394		824
1395	{	825	{
1396	dREQ;	826	dREQ;
1397		827
1398	req->type = ix;	828	req->type = ix;
1399	req->fh = newSVsv (fh);	829	req->sv1 = newSVsv (fh);
1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	830	req->int1 = fd;
1401	: IoOFP (sv_2io (fh)));	831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1402	req->offs = offset;
1403	req->size = length;	832	req->size = len;
1404	req->sv1 = SvREFCNT_inc (data);	833	req->sv2 = SvREFCNT_inc (data);
1405	req->ptr1 = (char *)svptr + dataoffset;	834	req->ptr2 = (char *)svptr + dataoffset;
1406	req->stroffset = dataoffset;	835	req->stroffset = dataoffset;
1407		836
1408	if (!SvREADONLY (data))	837	if (!SvREADONLY (data))
1409	{	838	{
1410	SvREADONLY_on (data);	839	SvREADONLY_on (data);
1411	req->flags |= FLAG_SV1_RO_OFF;	840	req->flags |= FLAG_SV2_RO_OFF;
1412	}	841	}
1413		842
1414	REQ_SEND;	843	REQ_SEND;
1415	}	844	}
1416	}	845	}
1417		846
1418	void	847	void
1419	aio_readlink (path,callback=&PL_sv_undef)	848	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1420	SV8 * path
1421	SV * callback
1422	PROTOTYPE: $$;$	849	PROTOTYPE: $$;$
1423	PPCODE:	850	PPCODE:
1424	{	851	{
1425	SV *data;	852	SV *data;
1426	dREQ;	853	dREQ;
1427		854
1428	data = newSV (NAME_MAX);
1429	SvPOK_on (data);
1430
1431	req->type = REQ_READLINK;	855	req->type = EIO_READLINK;
1432	req->fh = newSVsv (path);	856	req->sv1 = newSVsv (path);
1433	req->ptr2 = SvPVbyte_nolen (req->fh);	857	req->ptr1 = SvPVbyte_nolen (req->sv1);
1434	req->sv1 = data;
1435	req->ptr1 = SvPVbyte_nolen (data);
1436		858
1437	REQ_SEND;	859	REQ_SEND;
1438	}	860	}
1439		861
1440	void	862	void
1441	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	863	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1442	SV * out_fh
1443	SV * in_fh
1444	UV in_offset
1445	UV length
1446	SV * callback
1447	PROTOTYPE: $$$$;$	864	PROTOTYPE: $$$$;$
1448	PPCODE:	865	PPCODE:
1449	{	866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
1450	dREQ;	869	dREQ;
1451		870
1452	req->type = REQ_SENDFILE;	871	req->type = EIO_SENDFILE;
1453	req->fh = newSVsv (out_fh);	872	req->sv1 = newSVsv (out_fh);
1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	873	req->int1 = ofd;
1455	req->sv2 = newSVsv (in_fh);	874	req->sv2 = newSVsv (in_fh);
1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	875	req->int2 = ifd;
1457	req->offs = in_offset;	876	req->offs = in_offset;
1458	req->size = length;	877	req->size = length;
1459		878
1460	REQ_SEND;	879	REQ_SEND;
1461	}	880	}
1462		881
1463	void	882	void
1464	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1465	SV * fh
1466	UV offset
1467	IV length
1468	SV * callback
1469	PROTOTYPE: $$$;$	884	PROTOTYPE: $$$;$
1470	PPCODE:	885	PPCODE:
1471	{	886	{
		887	int fd = s_fileno_croak (fh, 0);
1472	dREQ;	888	dREQ;
1473		889
1474	req->type = REQ_READAHEAD;	890	req->type = EIO_READAHEAD;
1475	req->fh = newSVsv (fh);	891	req->sv1 = newSVsv (fh);
1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	892	req->int1 = fd;
1477	req->offs = offset;	893	req->offs = offset;
1478	req->size = length;	894	req->size = length;
1479		895
1480	REQ_SEND;	896	REQ_SEND;
1481	}	897	}
1482		898
1483	void	899	void
1484	aio_stat (fh_or_path,callback=&PL_sv_undef)	900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1485	SV8 * fh_or_path
1486	SV * callback
1487	ALIAS:	901	ALIAS:
1488	aio_stat = REQ_STAT	902	aio_stat = EIO_STAT
1489	aio_lstat = REQ_LSTAT	903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
1490	PPCODE:	905	PPCODE:
1491	{	906	{
1492	dREQ;	907	dREQ;
1493		908
1494	req->ptr2 = malloc (sizeof (Stat_t));	909	req->sv1 = newSVsv (fh_or_path);
1495	if (!req->ptr2)
1496	{
1497	req_free (req);
1498	croak ("out of memory during aio_stat statdata allocation");
1499	}
1500		910
1501	req->flags |= FLAG_PTR2_FREE;	911	if (SvPOK (req->sv1))
1502
1503	if (SvPOK (fh_or_path))
1504	{	912	{
1505	req->type = ix;	913	req->type = ix;
1506	req->sv1 = newSVsv (fh_or_path);
1507	req->ptr1 = SvPVbyte_nolen (req->sv1);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
1508	}	915	}
1509	else	916	else
1510	{	917	{
1511	req->type = REQ_FSTAT;	918	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1512	req->fh = newSVsv (fh_or_path);
1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	919	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1514	}	920	}
1515		921
1516	REQ_SEND;	922	REQ_SEND;
1517	}	923	}
1518		924
1519	void	925	void
		926	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		927	PPCODE:
		928	{
		929	dREQ;
		930
		931	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		932	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		933	req->sv1 = newSVsv (fh_or_path);
		934
		935	if (SvPOK (req->sv1))
		936	{
		937	req->type = EIO_UTIME;
		938	req->ptr1 = SvPVbyte_nolen (req->sv1);
		939	}
		940	else
		941	{
		942	req->type = EIO_FUTIME;
		943	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		944	}
		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->sv1 = newSVsv (fh_or_path);
		956	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		957
		958	if (SvPOK (req->sv1))
		959	{
		960	req->type = EIO_TRUNCATE;
		961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962	}
		963	else
		964	{
		965	req->type = EIO_FTRUNCATE;
		966	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		967	}
		968
		969	REQ_SEND;
		970	}
		971
		972	void
		973	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_chmod = EIO_CHMOD
		976	aio_mkdir = EIO_MKDIR
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->int2 = mode;
		982	req->sv1 = newSVsv (fh_or_path);
		983
		984	if (SvPOK (req->sv1))
		985	{
		986	req->type = ix;
		987	req->ptr1 = SvPVbyte_nolen (req->sv1);
		988	}
		989	else
		990	{
		991	req->type = EIO_FCHMOD;
		992	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		993	}
		994
		995	REQ_SEND;
		996	}
		997
		998	void
		999	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1000	PPCODE:
		1001	{
		1002	dREQ;
		1003
		1004	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1005	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1006	req->sv1 = newSVsv (fh_or_path);
		1007
		1008	if (SvPOK (req->sv1))
		1009	{
		1010	req->type = EIO_CHOWN;
		1011	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1012	}
		1013	else
		1014	{
		1015	req->type = EIO_FCHOWN;
		1016	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1017	}
		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_READDIR;
		1029	req->sv1 = newSVsv (pathname);
		1030	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1031	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1032
		1033	if (flags & EIO_READDIR_DENTS)
		1034	req->int1 |= EIO_READDIR_CUSTOM2;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	void
1520	aio_unlink (pathname,callback=&PL_sv_undef)	1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1521	SV8 * pathname
1522	SV * callback
1523	ALIAS:	1041	ALIAS:
1524	aio_unlink = REQ_UNLINK	1042	aio_unlink = EIO_UNLINK
1525	aio_rmdir = REQ_RMDIR	1043	aio_rmdir = EIO_RMDIR
1526	aio_readdir = REQ_READDIR	1044	aio_readdir = EIO_READDIR
1527	PPCODE:	1045	PPCODE:
1528	{	1046	{
1529	dREQ;	1047	dREQ;
1530		1048
1531	req->type = ix;	1049	req->type = ix;
…		…
1534		1052
1535	REQ_SEND;	1053	REQ_SEND;
1536	}	1054	}
1537		1055
1538	void	1056	void
1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1540	SV8 * oldpath
1541	SV8 * newpath
1542	SV * callback
1543	ALIAS:	1058	ALIAS:
1544	aio_link = REQ_LINK	1059	aio_link = EIO_LINK
1545	aio_symlink = REQ_SYMLINK	1060	aio_symlink = EIO_SYMLINK
1546	aio_rename = REQ_RENAME	1061	aio_rename = EIO_RENAME
1547	PPCODE:	1062	PPCODE:
1548	{	1063	{
1549	dREQ;	1064	dREQ;
1550		1065
1551	req->type = ix;	1066	req->type = ix;
1552	req->fh = newSVsv (oldpath);	1067	req->sv1 = newSVsv (oldpath);
1553	req->ptr2 = SvPVbyte_nolen (req->fh);
1554	req->sv1 = newSVsv (newpath);
1555	req->ptr1 = SvPVbyte_nolen (req->sv1);	1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1069	req->sv2 = newSVsv (newpath);
		1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
1556		1071
1557	REQ_SEND;	1072	REQ_SEND;
1558	}	1073	}
1559		1074
1560	void	1075	void
1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1076	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1562	SV8 * pathname
1563	SV * callback
1564	UV mode
1565	UV dev
1566	PPCODE:	1077	PPCODE:
1567	{	1078	{
1568	dREQ;	1079	dREQ;
1569		1080
1570	req->type = REQ_MKNOD;	1081	req->type = EIO_MKNOD;
1571	req->sv1 = newSVsv (pathname);	1082	req->sv1 = newSVsv (pathname);
1572	req->ptr1 = SvPVbyte_nolen (req->sv1);	1083	req->ptr1 = SvPVbyte_nolen (req->sv1);
1573	req->mode = (mode_t)mode;	1084	req->int2 = (mode_t)mode;
1574	req->offs = dev;	1085	req->offs = dev;
1575		1086
1576	REQ_SEND;	1087	REQ_SEND;
1577	}	1088	}
1578		1089
1579	void	1090	void
		1091	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1092	ALIAS:
		1093	aio_mtouch = EIO_MTOUCH
		1094	aio_msync = EIO_MSYNC
		1095	PROTOTYPE: $$$$;$
		1096	PPCODE:
		1097	{
		1098	STRLEN svlen;
		1099	UV len = SvUV (length);
		1100	char *svptr = SvPVbyte (data, svlen);
		1101
		1102	if (offset < 0)
		1103	offset += svlen;
		1104
		1105	if (offset < 0 || offset > svlen)
		1106	croak ("offset outside of scalar");
		1107
		1108	if (!SvOK (length) || len + offset > svlen)
		1109	len = svlen - offset;
		1110
		1111	{
		1112	dREQ;
		1113
		1114	req->type = ix;
		1115	req->size = len;
		1116	req->sv2 = SvREFCNT_inc (data);
		1117	req->ptr2 = (char *)svptr + offset;
		1118	req->int1 = flags;
		1119
		1120	REQ_SEND;
		1121	}
		1122	}
		1123
		1124	void
1580	aio_busy (delay,callback=&PL_sv_undef)	1125	aio_busy (double delay, SV *callback=&PL_sv_undef)
1581	double delay
1582	SV * callback
1583	PPCODE:	1126	PPCODE:
1584	{	1127	{
1585	dREQ;	1128	dREQ;
1586		1129
1587	req->type = REQ_BUSY;	1130	req->type = EIO_BUSY;
1588	req->int1 = delay < 0. ? 0 : delay;	1131	req->nv1 = delay < 0. ? 0. : delay;
1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1590		1132
1591	REQ_SEND;	1133	REQ_SEND;
1592	}	1134	}
1593		1135
1594	void	1136	void
1595	aio_group (callback=&PL_sv_undef)	1137	aio_group (SV *callback=&PL_sv_undef)
1596	SV * callback
1597	PROTOTYPE: ;$	1138	PROTOTYPE: ;$
1598	PPCODE:	1139	PPCODE:
1599	{	1140	{
1600	dREQ;	1141	dREQ;
1601		1142
1602	req->type = REQ_GROUP;	1143	req->type = EIO_GROUP;
1603		1144
1604	req_send (req);	1145	req_submit (req);
1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1146	XPUSHs (req_sv (req, aio_grp_stash));
1606	}	1147	}
1607		1148
1608	void	1149	void
1609	aio_nop (callback=&PL_sv_undef)	1150	aio_nop (SV *callback=&PL_sv_undef)
1610	SV * callback	1151	ALIAS:
		1152	aio_nop = EIO_NOP
		1153	aio_sync = EIO_SYNC
1611	PPCODE:	1154	PPCODE:
1612	{	1155	{
1613	dREQ;	1156	dREQ;
1614		1157
1615	req->type = REQ_NOP;	1158	req->type = ix;
1616		1159
1617	REQ_SEND;	1160	REQ_SEND;
1618	}	1161	}
1619		1162
1620	int	1163	int
1621	aioreq_pri (int pri = 0)	1164	aioreq_pri (int pri = 0)
1622	PROTOTYPE: ;$	1165	PROTOTYPE: ;$
1623	CODE:	1166	CODE:
1624	RETVAL = next_pri - PRI_BIAS;	1167	RETVAL = next_pri;
1625	if (items > 0)	1168	if (items > 0)
1626	{	1169	{
1627	if (pri < PRI_MIN) pri = PRI_MIN;	1170	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1628	if (pri > PRI_MAX) pri = PRI_MAX;	1171	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1629	next_pri = pri + PRI_BIAS;	1172	next_pri = pri;
1630	}	1173	}
1631	OUTPUT:	1174	OUTPUT:
1632	RETVAL	1175	RETVAL
1633		1176
1634	void	1177	void
1635	aioreq_nice (int nice = 0)	1178	aioreq_nice (int nice = 0)
1636	CODE:	1179	CODE:
1637	nice = next_pri - nice;	1180	nice = next_pri - nice;
1638	if (nice < PRI_MIN) nice = PRI_MIN;	1181	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1639	if (nice > PRI_MAX) nice = PRI_MAX;	1182	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1640	next_pri = nice + PRI_BIAS;	1183	next_pri = nice;
1641		1184
1642	void	1185	void
1643	flush ()	1186	flush ()
1644	PROTOTYPE:	1187	PROTOTYPE:
1645	CODE:	1188	CODE:
1646	while (nreqs)	1189	while (eio_nreqs ())
1647	{	1190	{
1648	poll_wait ();	1191	poll_wait ();
1649	poll_cb ();	1192	poll_cb ();
1650	}	1193	}
1651		1194
…		…
1660		1203
1661	int	1204	int
1662	poll_fileno()	1205	poll_fileno()
1663	PROTOTYPE:	1206	PROTOTYPE:
1664	CODE:	1207	CODE:
1665	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
1666	OUTPUT:	1209	OUTPUT:
1667	RETVAL	1210	RETVAL
1668		1211
1669	int	1212	int
1670	poll_cb(...)	1213	poll_cb(...)
…		…
1682		1225
1683	int	1226	int
1684	nreqs()	1227	nreqs()
1685	PROTOTYPE:	1228	PROTOTYPE:
1686	CODE:	1229	CODE:
1687	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
1688	OUTPUT:	1231	OUTPUT:
1689	RETVAL	1232	RETVAL
1690		1233
1691	int	1234	int
1692	nready()	1235	nready()
1693	PROTOTYPE:	1236	PROTOTYPE:
1694	CODE:	1237	CODE:
1695	RETVAL = get_nready ();	1238	RETVAL = eio_nready ();
1696	OUTPUT:	1239	OUTPUT:
1697	RETVAL	1240	RETVAL
1698		1241
1699	int	1242	int
1700	npending()	1243	npending()
1701	PROTOTYPE:	1244	PROTOTYPE:
1702	CODE:	1245	CODE:
1703	RETVAL = get_npending ();	1246	RETVAL = eio_npending ();
1704	OUTPUT:	1247	OUTPUT:
1705	RETVAL	1248	RETVAL
1706		1249
1707	int	1250	int
1708	nthreads()	1251	nthreads()
1709	PROTOTYPE:	1252	PROTOTYPE:
1710	CODE:	1253	CODE:
1711	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1254	RETVAL = eio_nthreads ();
1712	RETVAL = started;
1713	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1714	OUTPUT:	1255	OUTPUT:
1715	RETVAL	1256	RETVAL
1716		1257
		1258	int
		1259	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1260	PROTOTYPE: $$$$
		1261	CODE:
		1262	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1263	RETVAL = posix_fadvise (fh, offset, length, advice);
		1264	#else
		1265	RETVAL = errno = ENOSYS;
		1266	#endif
		1267	OUTPUT:
		1268	RETVAL
		1269
		1270	ssize_t
		1271	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1272	PROTOTYPE: $$$$
		1273	CODE:
		1274	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	mlockall (int flags)
		1280	PROTOTYPE: $
		1281	CODE:
		1282	#if _POSIX_MEMLOCK
		1283	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1284	extern int mallopt (int, int);
		1285	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1286	#endif
		1287	mlockall (flags);
		1288	#else
		1289	RETVAL ＝-1;
		1290	errno = ENOSYS;
		1291	#endif
		1292	OUTPUT:
		1293	RETVAL
		1294
		1295	int
		1296	munlockall ()
		1297	PROTOTYPE:
		1298	CODE:
		1299	#if _POSIX_MEMLOCK
		1300	munlockall ();
		1301	#else
		1302	RETVAL ＝-1;
		1303	errno = ENOSYS;
		1304	#endif
		1305	OUTPUT:
		1306	RETVAL
		1307
		1308	void _on_next_submit (SV *cb)
		1309	CODE:
		1310	SvREFCNT_dec (on_next_submit);
		1311	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1312
1717	PROTOTYPES: DISABLE	1313	PROTOTYPES: DISABLE
1718		1314
1719	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1315	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1720		1316
1721	void	1317	void
1722	cancel (aio_req_ornot req)	1318	cancel (aio_req_ornot req)
1723	CODE:	1319	CODE:
1724	req_cancel (req);	1320	eio_cancel (req);
1725		1321
1726	void	1322	void
1727	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1323	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1728	CODE:	1324	PPCODE:
		1325	{
		1326	if (GIMME_V != G_VOID)
		1327	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1328
		1329	if (items > 1)
		1330	{
		1331	SV *cb_cv =get_cb (callback);
		1332
1729	SvREFCNT_dec (req->callback);	1333	SvREFCNT_dec (req->callback);
1730	req->callback = newSVsv (callback);	1334	req->callback = SvREFCNT_inc (cb_cv);
		1335	}
		1336	}
1731		1337
1732	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1733		1339
1734	void	1340	void
1735	add (aio_req grp, ...)	1341	add (aio_req grp, ...)
1736	PPCODE:	1342	PPCODE:
1737	{	1343	{
1738	int i;	1344	int i;
1739	aio_req req;
1740		1345
1741	if (grp->int1 == 2)	1346	if (grp->int1 == 2)
1742	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1347	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1743		1348
1744	for (i = 1; i < items; ++i )	1349	for (i = 1; i < items; ++i )
1745	{	1350	{
		1351	aio_req req;
		1352
1746	if (GIMME_V != G_VOID)	1353	if (GIMME_V != G_VOID)
1747	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1354	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1748		1355
1749	req = SvAIO_REQ (ST (i));	1356	req = SvAIO_REQ (ST (i));
1750		1357
1751	if (req)	1358	if (req)
1752	{	1359	eio_grp_add (grp, req);
1753	++grp->size;
1754	req->grp = grp;
1755
1756	req->grp_prev = 0;
1757	req->grp_next = grp->grp_first;
1758
1759	if (grp->grp_first)
1760	grp->grp_first->grp_prev = req;
1761
1762	grp->grp_first = req;
1763	}
1764	}	1360	}
1765	}	1361	}
1766		1362
1767	void	1363	void
1768	cancel_subs (aio_req_ornot req)	1364	cancel_subs (aio_req_ornot req)
…		…
1777	AV *av;	1373	AV *av;
1778		1374
1779	grp->errorno = errno;	1375	grp->errorno = errno;
1780		1376
1781	av = newAV ();	1377	av = newAV ();
		1378	av_extend (av, items - 1);
1782		1379
1783	for (i = 1; i < items; ++i )	1380	for (i = 1; i < items; ++i )
1784	av_push (av, newSVsv (ST (i)));	1381	av_push (av, newSVsv (ST (i)));
1785		1382
1786	SvREFCNT_dec (grp->sv1);	1383	SvREFCNT_dec (grp->sv1);
…		…
1793	grp->errorno = errorno;	1390	grp->errorno = errorno;
1794		1391
1795	void	1392	void
1796	limit (aio_req grp, int limit)	1393	limit (aio_req grp, int limit)
1797	CODE:	1394	CODE:
1798	grp->int2 = limit;	1395	eio_grp_limit (grp, limit);
1799	aio_grp_feed (grp);
1800		1396
1801	void	1397	void
1802	feed (aio_req grp, SV *callback=&PL_sv_undef)	1398	feed (aio_req grp, SV *callback=&PL_sv_undef)
1803	CODE:	1399	CODE:
1804	{	1400	{
1805	SvREFCNT_dec (grp->sv2);	1401	SvREFCNT_dec (grp->sv2);
1806	grp->sv2 = newSVsv (callback);	1402	grp->sv2 = newSVsv (callback);
		1403	grp->feed = aio_grp_feed;
1807		1404
1808	if (grp->int2 <= 0)	1405	if (grp->int2 <= 0)
1809	grp->int2 = 2;	1406	grp->int2 = 2;
1810		1407
1811	aio_grp_feed (grp);	1408	eio_grp_limit (grp, grp->int2);
1812	}	1409	}
1813		1410

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