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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.86 by root, Mon Oct 30 23:30:00 2006 UTC vs.
Revision 1.155 by root, Fri Jul 17 00:56:54 2009 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	/* perl namespace pollution */
34	# if __linux	21	#undef VERSION
35	# include <sys/sendfile.h>	22
36	# elif __freebsd	23	#ifdef _WIN32
37	# include <sys/socket.h>	24
38	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	26	# undef malloc
40	# include <sys/socket.h>	27	# undef free
41	# elif __solaris /* not yet */	28
42	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
43	# else	61	#else
44	# error sendfile support requested but not available	62
45	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
46	#endif	70	#endif
47		71
48	/* number of seconds after which idle threads exit */	72	/* perl stupidly overrides readdir and maybe others */
49	#define IDLE_TIMEOUT 10	73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
50		77
51	/* used for struct dirent, AIX doesn't provide it */	78	#define EIO_STRUCT_STAT Stat_t
52	#ifndef NAME_MAX	79
53	# define NAME_MAX 4096	80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
54	#endif	89	#endif
55		90
56	#ifndef PTHREAD_STACK_MIN	91	/*****************************************************************************/
57	/* care for broken platforms, e.g. windows */	92
58	# define PTHREAD_STACK_MIN 16384	93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
59	#endif	97	#endif
60		98
61	#if __ia64	99	#define expect_false(expr) expect ((expr) != 0, 0)
62	# define STACKSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68		101
69	/* wether word reads are potentially non-atomic.	102	/*****************************************************************************/
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDACCESS_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDACCESS_UNSAFE 0
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif
79	#endif
80		103
81	/* buffer size for various temporary buffers */	104	static HV *stash;
82	#define AIO_BUFSIZE 65536	105	typedef SV SV8; /* byte-sv, used for argument-checking */
83		106	typedef int aio_rfd; /* read file desriptor */
84	#define dBUF \	107	typedef int aio_wfd; /* write file descriptor */
85	char *aio_buf; \
86	LOCK (wrklock); \
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91
92	enum {
93	REQ_QUIT,
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};
105		108
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		111
109	typedef struct aio_cb	112	#define EIO_REQ_MEMBERS \
110	{
111	struct aio_cb *volatile next;
112
113	SV *callback, *fh;	113	SV *callback; \
114	SV *sv1, *sv2;	114	SV *sv1, *sv2; \
115	void *ptr1, *ptr2;
116	Stat_t *statdata;
117	off_t offs;
118	size_t size;
119	ssize_t result;
120
121	STRLEN stroffset;	115	STRLEN stroffset; \
122	int type;	116	SV *self;
123	int int1, int2;
124	int errorno;
125	mode_t mode; /* open */
126		117
127	unsigned char flags;	118	#define EIO_NO_WRAPPERS 1
128	unsigned char pri;
129		119
130	SV *self; /* the perl counterpart of this request, if any */	120	#include "libeio/eio.h"
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	121
132	} aio_cb;	122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
133		151
134	enum {	152	enum {
135	FLAG_CANCELLED = 0x01,
136	FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
137	};	154	};
138		155
		156	#include "libeio/eio.c"
		157
139	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
140	typedef aio_cb *aio_req_ornot;	159	typedef eio_req *aio_req_ornot;
141		160
142	enum {	161	static SV *on_next_submit;
143	PRI_MIN = -4,	162	static int next_pri = EIO_PRI_DEFAULT;
144	PRI_MAX = 4,	163	static int max_outstanding;
145		164
146	DEFAULT_PRI = 0,	165	static s_epipe respipe;
147	PRI_BIAS = -PRI_MIN,
148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
149	};
150		166
151	#define AIO_TICKS ((1000000 + 1023) >> 10)
152
153	static unsigned int max_poll_time = 0;
154	static unsigned int max_poll_reqs = 0;
155
156	/* calculcate time difference in ~1/AIO_TICKS of a second */
157	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
158	{
159	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
160	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
161	}
162
163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
164
165	static unsigned int started, idle, wanted;
166
167	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
168	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
169	#else
170	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
171	#endif
172
173	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
174	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
175
176	/* worker threads management */
177	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
178
179	typedef struct worker {
180	/* locked by wrklock */
181	struct worker *prev, *next;
182
183	pthread_t tid;
184
185	/* locked by reslock, reqlock or wrklock */
186	aio_req req; /* currently processed request */
187	void *dbuf;
188	DIR *dirp;
189	} worker;
190
191	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
192
193	static void worker_clear (worker *wrk)
194	{
195	if (wrk->dirp)
196	{
197	closedir (wrk->dirp);
198	wrk->dirp = 0;
199	}
200
201	if (wrk->dbuf)
202	{
203	free (wrk->dbuf);
204	wrk->dbuf = 0;
205	}
206	}
207
208	static void worker_free (worker *wrk)
209	{
210	wrk->next->prev = wrk->prev;
211	wrk->prev->next = wrk->next;
212
213	free (wrk);
214	}
215
216	static volatile unsigned int nreqs, nready, npending;
217	static volatile unsigned int max_idle = 4;
218	static volatile unsigned int max_outstanding = 0xffffffff;
219	static int respipe [2];
220
221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
224
225	#if WORDACCESS_UNSAFE
226
227	static unsigned int get_nready ()
228	{
229	unsigned int retval;
230
231	LOCK (reqlock);
232	retval = nready;
233	UNLOCK (reqlock);
234
235	return retval;
236	}
237
238	static unsigned int get_npending ()
239	{
240	unsigned int retval;
241
242	LOCK (reslock);
243	retval = npending;
244	UNLOCK (reslock);
245
246	return retval;
247	}
248
249	static unsigned int get_nthreads ()
250	{
251	unsigned int retval;
252
253	LOCK (wrklock);
254	retval = started;
255	UNLOCK (wrklock);
256
257	return retval;
258	}
259
260	#else
261
262	# define get_nready() nready
263	# define get_npending() npending
264	# define get_nthreads() started
265
266	#endif
267
268	/*
269	* a somewhat faster data structure might be nice, but
270	* with 8 priorities this actually needs <20 insns
271	* per shift, the most expensive operation.
272	*/
273	typedef struct {
274	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
275	int size;
276	} reqq;
277
278	static reqq req_queue;
279	static reqq res_queue;
280
281	int reqq_push (reqq *q, aio_req req)
282	{
283	int pri = req->pri;
284	req->next = 0;
285
286	if (q->qe[pri])
287	{
288	q->qe[pri]->next = req;
289	q->qe[pri] = req;
290	}
291	else
292	q->qe[pri] = q->qs[pri] = req;
293
294	return q->size++;
295	}
296
297	aio_req reqq_shift (reqq *q)
298	{
299	int pri;
300
301	if (!q->size)
302	return 0;
303
304	--q->size;
305
306	for (pri = NUM_PRI; pri--; )
307	{
308	aio_req req = q->qs[pri];
309
310	if (req)
311	{
312	if (!(q->qs[pri] = req->next))
313	q->qe[pri] = 0;
314
315	return req;
316	}
317	}
318
319	abort ();
320	}
321
322	static int poll_cb ();
323	static void req_invoke (aio_req req);
324	static void req_free (aio_req req);	167	static void req_destroy (aio_req req);
325	static void req_cancel (aio_req req);	168	static void req_cancel (aio_req req);
		169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	s_epipe_signal (&respipe);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	s_epipe_drain (&respipe);
		180	}
326		181
327	/* must be called at most once */	182	/* must be called at most once */
328	static SV *req_sv (aio_req req, const char *klass)	183	static SV *req_sv (aio_req req, const char *klass)
329	{	184	{
330	if (!req->self)	185	if (!req->self)
…		…
348	return mg ? (aio_req)mg->mg_ptr : 0;	203	return mg ? (aio_req)mg->mg_ptr : 0;
349	}	204	}
350		205
351	static void aio_grp_feed (aio_req grp)	206	static void aio_grp_feed (aio_req grp)
352	{	207	{
353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	208	if (grp->sv2 && SvOK (grp->sv2))
354	{	209	{
355	int old_len = grp->size;
356
357	if (grp->sv2 && SvOK (grp->sv2))
358	{
359	dSP;	210	dSP;
360		211
361	ENTER;	212	ENTER;
362	SAVETMPS;	213	SAVETMPS;
363	PUSHMARK (SP);	214	PUSHMARK (SP);
364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
365	PUTBACK;	216	PUTBACK;
366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
367	SPAGAIN;	218	SPAGAIN;
368	FREETMPS;	219	FREETMPS;
369	LEAVE;	220	LEAVE;
370	}
371
372	/* stop if no progress has been made */
373	if (old_len == grp->size)
374	{
375	SvREFCNT_dec (grp->sv2);
376	grp->sv2 = 0;
377	break;
378	}
379	}	221	}
380	}	222	}
381		223
382	static void aio_grp_dec (aio_req grp)	224	static void req_submit (eio_req *req)
383	{	225	{
384	--grp->size;	226	eio_submit (req);
385		227
386	/* call feeder, if applicable */	228	if (expect_false (on_next_submit))
387	aio_grp_feed (grp);
388
389	/* finish, if done */
390	if (!grp->size && grp->int1)
391	{	229	{
392	req_invoke (grp);	230	dSP;
393	req_free (grp);	231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
394	}	238	}
395	}	239	}
396		240
397	static void req_invoke (aio_req req)	241	static int req_invoke (eio_req *req)
398	{	242	{
399	dSP;	243	dSP;
400		244
401	if (req->flags & FLAG_DATA_RO_OFF)	245	if (req->flags & FLAG_SV2_RO_OFF)
402	SvREADONLY_off (req->sv1);	246	SvREADONLY_off (req->sv2);
403		247
404	if (req->statdata)	248	if (!EIO_CANCELLED (req) && req->callback)
405	{
406	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
407	PL_laststatval = req->result;
408	PL_statcache = *(req->statdata);
409	}
410
411	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
412	{	249	{
413	ENTER;	250	ENTER;
414	SAVETMPS;	251	SAVETMPS;
415	PUSHMARK (SP);	252	PUSHMARK (SP);
416	EXTEND (SP, 1);	253	EXTEND (SP, 1);
417		254
418	switch (req->type)	255	switch (req->type)
419	{	256	{
420	case REQ_READDIR:	257	case EIO_READDIR:
421	{	258	{
422	SV *rv = &PL_sv_undef;	259	SV *rv = &PL_sv_undef;
423		260
424	if (req->result >= 0)	261	if (req->result >= 0)
425	{	262	{
426	int i;	263	int i;
427	char *buf = req->ptr2;	264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
428	AV *av = newAV ();	266	AV *av = newAV ();
429		267
430	av_extend (av, req->result - 1);	268	av_extend (av, req->result - 1);
431		269
432	for (i = 0; i < req->result; ++i)	270	for (i = 0; i < req->result; ++i)
433	{	271	{
434	SV *sv = newSVpv (buf, 0);	272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
435		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
436	av_store (av, i, sv);	296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
437	buf += SvCUR (sv) + 1;	304	names += SvCUR (name) + 1;
		305	}
438	}	306	}
439		307
440	rv = sv_2mortal (newRV_noinc ((SV *)av));	308	rv = sv_2mortal (newRV_noinc ((SV *)av));
441	}	309	}
442		310
443	PUSHs (rv);	311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
444	}	315	}
445	break;	316	break;
446		317
447	case REQ_OPEN:	318	case EIO_OPEN:
448	{	319	{
449	/* convert fd to fh */	320	/* convert fd to fh */
450	SV *fh;	321	SV *fh = &PL_sv_undef;
451		322
452	PUSHs (sv_2mortal (newSViv (req->result)));	323	if (req->result >= 0)
453	PUTBACK;	324	{
454	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	325	GV *gv = (GV *)sv_newmortal ();
455	SPAGAIN;	326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
456		332
457	fh = SvREFCNT_inc (POPs);	333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
458		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
459	PUSHMARK (SP);	345	PUSHs (fh);
460	XPUSHs (sv_2mortal (fh));
461	}	346	}
462	break;	347	break;
463		348
464	case REQ_GROUP:	349	case EIO_GROUP:
465	req->int1 = 2; /* mark group as finished */	350	req->int1 = 2; /* mark group as finished */
466		351
467	if (req->sv1)	352	if (req->sv1)
468	{	353	{
469	int i;	354	int i;
…		…
473	for (i = 0; i <= AvFILL (av); ++i)	358	for (i = 0; i <= AvFILL (av); ++i)
474	PUSHs (*av_fetch (av, i, 0));	359	PUSHs (*av_fetch (av, i, 0));
475	}	360	}
476	break;	361	break;
477		362
478	case REQ_NOP:	363	case EIO_NOP:
479	case REQ_BUSY:	364	case EIO_BUSY:
480	break;	365	break;
481		366
482	case REQ_READLINK:	367	case EIO_READLINK:
483	if (req->result > 0)	368	if (req->result > 0)
484	{	369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
485	SvCUR_set (req->sv1, req->result);
486	*SvEND (req->sv1) = 0;
487	PUSHs (req->sv1);
488	}
489	break;	370	break;
490		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
491	case REQ_READ:	381	case EIO_READ:
		382	{
492	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
493	*SvEND (req->sv1) = 0;	384	*SvEND (req->sv2) = 0;
494	/* fall through */	385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
		395
495	default:	396	default:
496	PUSHs (sv_2mortal (newSViv (req->result)));	397	PUSHs (sv_2mortal (newSViv (req->result)));
497	break;	398	break;
498	}	399	}
499		400
500	errno = req->errorno;	401	errno = req->errorno;
501		402
502	PUTBACK;	403	PUTBACK;
503	call_sv (req->callback, G_VOID | G_EVAL);	404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
504	SPAGAIN;	405	SPAGAIN;
505		406
506	FREETMPS;	407	FREETMPS;
507	LEAVE;	408	LEAVE;
		409
		410	PUTBACK;
508	}	411	}
509		412
510	if (req->grp)	413	return !!SvTRUE (ERRSV);
511	{
512	aio_req grp = req->grp;
513
514	/* unlink request */
515	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
516	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
517
518	if (grp->grp_first == req)
519	grp->grp_first = req->grp_next;
520
521	aio_grp_dec (grp);
522	}
523
524	if (SvTRUE (ERRSV))
525	{
526	req_free (req);
527	croak (0);
528	}
529	}	414	}
530		415
531	static void req_free (aio_req req)	416	static void req_destroy (aio_req req)
532	{	417	{
533	if (req->self)	418	if (req->self)
534	{	419	{
535	sv_unmagic (req->self, PERL_MAGIC_ext);	420	sv_unmagic (req->self, PERL_MAGIC_ext);
536	SvREFCNT_dec (req->self);	421	SvREFCNT_dec (req->self);
537	}	422	}
538		423
539	SvREFCNT_dec (req->fh);
540	SvREFCNT_dec (req->sv1);	424	SvREFCNT_dec (req->sv1);
541	SvREFCNT_dec (req->sv2);	425	SvREFCNT_dec (req->sv2);
542	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
543	Safefree (req->statdata);
544
545	if (req->type == REQ_READDIR)
546	free (req->ptr2);
547		427
548	Safefree (req);	428	Safefree (req);
549	}	429	}
550		430
551	static void req_cancel_subs (aio_req grp)	431	static void req_cancel_subs (aio_req grp)
552	{	432	{
553	aio_req sub;	433	aio_req sub;
554		434
555	if (grp->type != REQ_GROUP)	435	if (grp->type != EIO_GROUP)
556	return;	436	return;
557		437
558	SvREFCNT_dec (grp->sv2);	438	SvREFCNT_dec (grp->sv2);
559	grp->sv2 = 0;	439	grp->sv2 = 0;
560		440
561	for (sub = grp->grp_first; sub; sub = sub->grp_next)	441	eio_grp_cancel (grp);
562	req_cancel (sub);
563	}	442	}
564		443
565	static void req_cancel (aio_req req)	444	static void
		445	create_respipe (void)
566	{	446	{
567	req->flags |= FLAG_CANCELLED;	447	if (s_epipe_renew (&respipe))
568		448	croak ("IO::AIO: unable to initialize result pipe");
569	req_cancel_subs (req);
570	}	449	}
571		450
572	static void *aio_proc(void *arg);
573
574	static void start_thread (void)
575	{
576	sigset_t fullsigset, oldsigset;
577	pthread_attr_t attr;
578
579	worker *wrk = calloc (1, sizeof (worker));
580
581	if (!wrk)
582	croak ("unable to allocate worker thread data");
583
584	pthread_attr_init (&attr);
585	pthread_attr_setstacksize (&attr, STACKSIZE);
586	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
587	#ifdef PTHREAD_SCOPE_PROCESS
588	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
589	#endif
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 maybe_start_thread ()
612	{
613	if (get_nthreads () >= wanted)
614	return;
615
616	/* todo: maybe use idle here, but might be less exact */
617	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
618	return;
619
620	start_thread ();
621	}
622
623	static void req_send (aio_req req)
624	{
625	++nreqs;
626
627	LOCK (reqlock);
628	++nready;
629	reqq_push (&req_queue, req);
630	pthread_cond_signal (&reqwait);
631	UNLOCK (reqlock);
632
633	maybe_start_thread ();
634	}
635
636	static void end_thread (void)
637	{
638	aio_req req;
639
640	Newz (0, req, 1, aio_cb);
641
642	req->type = REQ_QUIT;
643	req->pri = PRI_MAX + PRI_BIAS;
644
645	LOCK (reqlock);
646	reqq_push (&req_queue, req);
647	pthread_cond_signal (&reqwait);
648	UNLOCK (reqlock);
649
650	LOCK (wrklock);
651	--started;
652	UNLOCK (wrklock);
653	}
654
655	static void set_max_idle (int nthreads)
656	{
657	if (WORDACCESS_UNSAFE) LOCK (reqlock);
658	max_idle = nthreads <= 0 ? 1 : nthreads;
659	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
660	}
661
662	static void min_parallel (int nthreads)
663	{
664	if (wanted < nthreads)
665	wanted = nthreads;
666	}
667
668	static void max_parallel (int nthreads)
669	{
670	if (wanted > nthreads)
671	wanted = nthreads;
672
673	while (started > wanted)
674	end_thread ();
675	}
676
677	static void poll_wait ()	451	static void poll_wait (void)
678	{	452	{
679	fd_set rfd;
680
681	while (nreqs)	453	while (eio_nreqs ())
682	{	454	{
683	int size;	455	int size;
684	if (WORDACCESS_UNSAFE) LOCK (reslock);	456
		457	X_LOCK (reslock);
685	size = res_queue.size;	458	size = res_queue.size;
686	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	459	X_UNLOCK (reslock);
687		460
688	if (size)	461	if (size)
689	return;	462	return;
690		463
691	maybe_start_thread ();	464	etp_maybe_start_thread ();
692		465
693	FD_ZERO(&rfd);	466	s_epipe_wait (&respipe);
694	FD_SET(respipe [0], &rfd);
695
696	select (respipe [0] + 1, &rfd, 0, 0, 0);
697	}	467	}
698	}	468	}
699		469
700	static int poll_cb ()	470	static int poll_cb (void)
701	{	471	{
702	dSP;
703	int count = 0;
704	int maxreqs = max_poll_reqs;
705	int do_croak = 0;
706	struct timeval tv_start, tv_now;
707	aio_req req;
708
709	if (max_poll_time)
710	gettimeofday (&tv_start, 0);
711
712	for (;;)	472	for (;;)
713	{	473	{
714	for (;;)	474	int res = eio_poll ();
715	{
716	maybe_start_thread ();
717		475
718	LOCK (reslock);	476	if (res > 0)
719	req = reqq_shift (&res_queue);
720
721	if (req)
722	{
723	--npending;
724
725	if (!res_queue.size)
726	{
727	/* read any signals sent by the worker threads */
728	char buf [32];
729	while (read (respipe [0], buf, 32) == 32)
730	;
731	}
732	}
733
734	UNLOCK (reslock);
735
736	if (!req)
737	break;
738
739	--nreqs;
740
741	if (req->type == REQ_GROUP && req->size)
742	{
743	req->int1 = 1; /* mark request as delayed */
744	continue;
745	}
746	else
747	{
748	req_invoke (req);
749
750	count++;
751	}
752
753	req_free (req);
754
755	if (maxreqs && !--maxreqs)
756	break;
757
758	if (max_poll_time)
759	{
760	gettimeofday (&tv_now, 0);
761
762	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
763	break;
764	}
765	}
766
767	if (nreqs <= max_outstanding)
768	break;	477	croak (0);
		478
		479	if (!max_outstanding || max_outstanding > eio_nreqs ())
		480	return res;
769		481
770	poll_wait ();	482	poll_wait ();
771
772	++maxreqs;
773	}	483	}
774
775	return count;
776	}
777
778	static void create_pipe ()
779	{
780	if (pipe (respipe))
781	croak ("unable to initialize result pipe");
782
783	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
784	croak ("cannot set result pipe to nonblocking mode");
785
786	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
787	croak ("cannot set result pipe to nonblocking mode");
788	}
789
790	/*****************************************************************************/
791	/* work around various missing functions */
792
793	#if !HAVE_PREADWRITE
794	# define pread aio_pread
795	# define pwrite aio_pwrite
796
797	/*
798	* make our pread/pwrite safe against themselves, but not against
799	* normal read/write by using a mutex. slows down execution a lot,
800	* but that's your problem, not mine.
801	*/
802	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
803
804	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
805	{
806	ssize_t res;
807	off_t ooffset;
808
809	LOCK (preadwritelock);
810	ooffset = lseek (fd, 0, SEEK_CUR);
811	lseek (fd, offset, SEEK_SET);
812	res = read (fd, buf, count);
813	lseek (fd, ooffset, SEEK_SET);
814	UNLOCK (preadwritelock);
815
816	return res;
817	}
818
819	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
820	{
821	ssize_t res;
822	off_t ooffset;
823
824	LOCK (preadwritelock);
825	ooffset = lseek (fd, 0, SEEK_CUR);
826	lseek (fd, offset, SEEK_SET);
827	res = write (fd, buf, count);
828	lseek (fd, offset, SEEK_SET);
829	UNLOCK (preadwritelock);
830
831	return res;
832	}
833	#endif
834
835	#if !HAVE_FDATASYNC
836	# define fdatasync fsync
837	#endif
838
839	#if !HAVE_READAHEAD
840	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
841
842	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
843	{
844	dBUF;
845
846	while (count > 0)
847	{
848	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
849
850	pread (fd, aio_buf, len, offset);
851	offset += len;
852	count -= len;
853	}
854
855	errno = 0;
856	}
857
858	#endif
859
860	#if !HAVE_READDIR_R
861	# define readdir_r aio_readdir_r
862
863	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
864
865	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
866	{
867	struct dirent *e;
868	int errorno;
869
870	LOCK (readdirlock);
871
872	e = readdir (dirp);
873	errorno = errno;
874
875	if (e)
876	{
877	*res = ent;
878	strcpy (ent->d_name, e->d_name);
879	}
880	else
881	*res = 0;
882
883	UNLOCK (readdirlock);
884
885	errno = errorno;
886	return e ? 0 : -1;
887	}
888	#endif
889
890	/* sendfile always needs emulation */
891	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
892	{
893	ssize_t res;
894
895	if (!count)
896	return 0;
897
898	#if HAVE_SENDFILE
899	# if __linux
900	res = sendfile (ofd, ifd, &offset, count);
901
902	# elif __freebsd
903	/*
904	* Of course, the freebsd sendfile is a dire hack with no thoughts
905	* wasted on making it similar to other I/O functions.
906	*/
907	{
908	off_t sbytes;
909	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
910
911	if (res < 0 && sbytes)
912	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
913	res = sbytes;
914	}
915
916	# elif __hpux
917	res = sendfile (ofd, ifd, offset, count, 0, 0);
918
919	# elif __solaris
920	{
921	struct sendfilevec vec;
922	size_t sbytes;
923
924	vec.sfv_fd = ifd;
925	vec.sfv_flag = 0;
926	vec.sfv_off = offset;
927	vec.sfv_len = count;
928
929	res = sendfilev (ofd, &vec, 1, &sbytes);
930
931	if (res < 0 && sbytes)
932	res = sbytes;
933	}
934
935	# endif
936	#else
937	res = -1;
938	errno = ENOSYS;
939	#endif
940
941	if (res < 0
942	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
943	#if __solaris
944	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
945	#endif
946	)
947	)
948	{
949	/* emulate sendfile. this is a major pain in the ass */
950	dBUF;
951
952	res = 0;
953
954	while (count)
955	{
956	ssize_t cnt;
957
958	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
959
960	if (cnt <= 0)
961	{
962	if (cnt && !res) res = -1;
963	break;
964	}
965
966	cnt = write (ofd, aio_buf, cnt);
967
968	if (cnt <= 0)
969	{
970	if (cnt && !res) res = -1;
971	break;
972	}
973
974	offset += cnt;
975	res += cnt;
976	count -= cnt;
977	}
978	}
979
980	return res;
981	}
982
983	/* read a full directory */
984	static void scandir_ (aio_req req, worker *self)
985	{
986	DIR *dirp;
987	union
988	{
989	struct dirent d;
990	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
991	} *u;
992	struct dirent *entp;
993	char *name, *names;
994	int memlen = 4096;
995	int memofs = 0;
996	int res = 0;
997	int errorno;
998
999	LOCK (wrklock);
1000	self->dirp = dirp = opendir (req->ptr1);
1001	self->dbuf = u = malloc (sizeof (*u));
1002	req->ptr2 = names = malloc (memlen);
1003	UNLOCK (wrklock);
1004
1005	if (dirp && u && names)
1006	for (;;)
1007	{
1008	errno = 0;
1009	readdir_r (dirp, &u->d, &entp);
1010
1011	if (!entp)
1012	break;
1013
1014	name = entp->d_name;
1015
1016	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1017	{
1018	int len = strlen (name) + 1;
1019
1020	res++;
1021
1022	while (memofs + len > memlen)
1023	{
1024	memlen *= 2;
1025	LOCK (wrklock);
1026	req->ptr2 = names = realloc (names, memlen);
1027	UNLOCK (wrklock);
1028
1029	if (!names)
1030	break;
1031	}
1032
1033	memcpy (names + memofs, name, len);
1034	memofs += len;
1035	}
1036	}
1037
1038	if (errno)
1039	res = -1;
1040
1041	req->result = res;
1042	}
1043
1044	/*****************************************************************************/
1045
1046	static void *aio_proc (void *thr_arg)
1047	{
1048	aio_req req;
1049	struct timespec ts;
1050	worker *self = (worker *)thr_arg;
1051
1052	/* try to distribute timeouts somewhat evenly */
1053	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1054	* (1000000000UL / 1024UL);
1055
1056	for (;;)
1057	{
1058	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1059
1060	LOCK (reqlock);
1061
1062	for (;;)
1063	{
1064	self->req = req = reqq_shift (&req_queue);
1065
1066	if (req)
1067	break;
1068
1069	++idle;
1070
1071	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1072	== ETIMEDOUT)
1073	{
1074	if (idle > max_idle)
1075	{
1076	--idle;
1077	UNLOCK (reqlock);
1078	LOCK (wrklock);
1079	--started;
1080	UNLOCK (wrklock);
1081	goto quit;
1082	}
1083
1084	/* we are allowed to idle, so do so without any timeout */
1085	pthread_cond_wait (&reqwait, &reqlock);
1086	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1087	}
1088
1089	--idle;
1090	}
1091
1092	--nready;
1093
1094	UNLOCK (reqlock);
1095
1096	errno = 0; /* strictly unnecessary */
1097
1098	if (!(req->flags & FLAG_CANCELLED))
1099	switch (req->type)
1100	{
1101	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1102	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1103
1104	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1105	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1106
1107	case REQ_STAT: req->result = stat (req->ptr1, req->statdata); break;
1108	case REQ_LSTAT: req->result = lstat (req->ptr1, req->statdata); break;
1109	case REQ_FSTAT: req->result = fstat (req->int1, req->statdata); break;
1110
1111	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1112	case REQ_CLOSE: req->result = close (req->int1); break;
1113	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1114	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1115	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1116	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1117	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1118	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1119	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1120
1121	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1122	case REQ_FSYNC: req->result = fsync (req->int1); break;
1123	case REQ_READDIR: scandir_ (req, self); break;
1124
1125	case REQ_BUSY:
1126	{
1127	struct timeval tv;
1128
1129	tv.tv_sec = req->int1;
1130	tv.tv_usec = req->int2;
1131
1132	req->result = select (0, 0, 0, 0, &tv);
1133	}
1134
1135	case REQ_GROUP:
1136	case REQ_NOP:
1137	break;
1138
1139	case REQ_QUIT:
1140	goto quit;
1141
1142	default:
1143	req->result = ENOSYS;
1144	break;
1145	}
1146
1147	req->errorno = errno;
1148
1149	LOCK (reslock);
1150
1151	++npending;
1152
1153	if (!reqq_push (&res_queue, req))
1154	/* write a dummy byte to the pipe so fh becomes ready */
1155	write (respipe [1], &respipe, 1);
1156
1157	self->req = 0;
1158	worker_clear (self);
1159
1160	UNLOCK (reslock);
1161	}
1162
1163	quit:
1164	LOCK (wrklock);
1165	worker_free (self);
1166	UNLOCK (wrklock);
1167
1168	return 0;
1169	}
1170
1171	/*****************************************************************************/
1172
1173	static void atfork_prepare (void)
1174	{
1175	LOCK (wrklock);
1176	LOCK (reqlock);
1177	LOCK (reslock);
1178	#if !HAVE_PREADWRITE
1179	LOCK (preadwritelock);
1180	#endif
1181	#if !HAVE_READDIR_R
1182	LOCK (readdirlock);
1183	#endif
1184	}
1185
1186	static void atfork_parent (void)
1187	{
1188	#if !HAVE_READDIR_R
1189	UNLOCK (readdirlock);
1190	#endif
1191	#if !HAVE_PREADWRITE
1192	UNLOCK (preadwritelock);
1193	#endif
1194	UNLOCK (reslock);
1195	UNLOCK (reqlock);
1196	UNLOCK (wrklock);
1197	}	484	}
1198		485
1199	static void atfork_child (void)	486	static void atfork_child (void)
1200	{	487	{
1201	aio_req prv;
1202
1203	while (prv = reqq_shift (&req_queue))
1204	req_free (prv);
1205
1206	while (prv = reqq_shift (&res_queue))
1207	req_free (prv);
1208
1209	while (wrk_first.next != &wrk_first)
1210	{
1211	worker *wrk = wrk_first.next;
1212
1213	if (wrk->req)
1214	req_free (wrk->req);
1215
1216	worker_clear (wrk);
1217	worker_free (wrk);
1218	}
1219
1220	started = 0;
1221	idle = 0;
1222	nreqs = 0;
1223	nready = 0;
1224	npending = 0;
1225
1226	close (respipe [0]);
1227	close (respipe [1]);
1228	create_pipe ();	488	create_respipe ();
		489	}
1229		490
1230	atfork_parent ();	491	static SV *
		492	get_cb (SV *cb_sv)
		493	{
		494	SvGETMAGIC (cb_sv);
		495	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1231	}	496	}
1232		497
1233	#define dREQ \	498	#define dREQ \
		499	SV *cb_cv; \
1234	aio_req req; \	500	aio_req req; \
1235	int req_pri = next_pri; \	501	int req_pri = next_pri; \
1236	next_pri = DEFAULT_PRI + PRI_BIAS; \	502	next_pri = EIO_PRI_DEFAULT; \
1237	\	503	\
1238	if (SvOK (callback) && !SvROK (callback)) \	504	cb_cv = get_cb (callback); \
1239	croak ("callback must be undef or of reference type"); \
1240	\	505	\
1241	Newz (0, req, 1, aio_cb); \	506	Newz (0, req, 1, eio_req); \
1242	if (!req) \	507	if (!req) \
1243	croak ("out of memory during aio_req allocation"); \	508	croak ("out of memory during eio_req allocation"); \
1244	\	509	\
1245	req->callback = newSVsv (callback); \	510	req->callback = SvREFCNT_inc (cb_cv); \
1246	req->pri = req_pri	511	req->pri = req_pri
1247		512
1248	#define REQ_SEND \	513	#define REQ_SEND \
		514	PUTBACK; \
1249	req_send (req); \	515	req_submit (req); \
		516	SPAGAIN; \
1250	\	517	\
1251	if (GIMME_V != G_VOID) \	518	if (GIMME_V != G_VOID) \
1252	XPUSHs (req_sv (req, AIO_REQ_KLASS));	519	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1253		520
1254	MODULE = IO::AIO PACKAGE = IO::AIO	521	MODULE = IO::AIO PACKAGE = IO::AIO
1255		522
1256	PROTOTYPES: ENABLE	523	PROTOTYPES: ENABLE
1257		524
1258	BOOT:	525	BOOT:
1259	{	526	{
		527	static const struct {
		528	const char *name;
		529	IV iv;
		530	} *civ, const_iv[] = {
		531	# define const_iv(name, value) { # name, (IV) value },
		532	# define const_eio(name) { # name, (IV) EIO_ ## name },
		533	const_iv (EXDEV , EXDEV)
		534	const_iv (ENOSYS , ENOSYS)
		535	const_iv (O_RDONLY, O_RDONLY)
		536	const_iv (O_WRONLY, O_WRONLY)
		537	const_iv (O_CREAT , O_CREAT)
		538	const_iv (O_TRUNC , O_TRUNC)
		539	#ifndef _WIN32
		540	const_iv (S_IFIFO , S_IFIFO)
		541	#endif
		542	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		543	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		544	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		545	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		546	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		547	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		548
		549	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		550	const_eio (SYNC_FILE_RANGE_WRITE)
		551	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		552
		553	const_eio (READDIR_DENTS)
		554	const_eio (READDIR_DIRS_FIRST)
		555	const_eio (READDIR_STAT_ORDER)
		556	const_eio (READDIR_FOUND_UNKNOWN)
		557
		558	const_eio (DT_UNKNOWN)
		559	const_eio (DT_FIFO)
		560	const_eio (DT_CHR)
		561	const_eio (DT_DIR)
		562	const_eio (DT_BLK)
		563	const_eio (DT_REG)
		564	const_eio (DT_LNK)
		565	const_eio (DT_SOCK)
		566	const_eio (DT_WHT)
		567	};
		568
1260	HV *stash = gv_stashpv ("IO::AIO", 1);	569	stash = gv_stashpv ("IO::AIO", 1);
1261		570
1262	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	571	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1263	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	572	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
1264	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1265	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1266	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1267	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1268		573
1269	create_pipe ();	574	create_respipe ();
1270	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	575
		576	if (eio_init (want_poll, done_poll) < 0)
		577	croak ("IO::AIO: unable to initialise eio library");
		578
		579	/* atfork child called in fifo order, so before eio's handler */
		580	X_THREAD_ATFORK (0, 0, atfork_child);
1271	}	581	}
1272		582
1273	void	583	void
1274	max_poll_reqs (int nreqs)	584	max_poll_reqs (int nreqs)
1275	PROTOTYPE: $	585	PROTOTYPE: $
1276	CODE:	586	CODE:
1277	max_poll_reqs = nreqs;	587	eio_set_max_poll_reqs (nreqs);
1278		588
1279	void	589	void
1280	max_poll_time (double nseconds)	590	max_poll_time (double nseconds)
1281	PROTOTYPE: $	591	PROTOTYPE: $
1282	CODE:	592	CODE:
1283	max_poll_time = nseconds * AIO_TICKS;	593	eio_set_max_poll_time (nseconds);
1284		594
1285	void	595	void
1286	min_parallel (int nthreads)	596	min_parallel (int nthreads)
1287	PROTOTYPE: $	597	PROTOTYPE: $
		598	CODE:
		599	eio_set_min_parallel (nthreads);
1288		600
1289	void	601	void
1290	max_parallel (int nthreads)	602	max_parallel (int nthreads)
1291	PROTOTYPE: $	603	PROTOTYPE: $
		604	CODE:
		605	eio_set_max_parallel (nthreads);
1292		606
1293	void	607	void
1294	max_idle (int nthreads)	608	max_idle (int nthreads)
1295	PROTOTYPE: $	609	PROTOTYPE: $
1296	CODE:	610	CODE:
1297	set_max_idle (nthreads);	611	eio_set_max_idle (nthreads);
1298		612
1299	int	613	void
1300	max_outstanding (int maxreqs)	614	max_outstanding (int maxreqs)
1301	PROTOTYPE: $	615	PROTOTYPE: $
1302	CODE:	616	CODE:
1303	RETVAL = max_outstanding;
1304	max_outstanding = maxreqs;	617	max_outstanding = maxreqs;
1305	OUTPUT:
1306	RETVAL
1307		618
1308	void	619	void
1309	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	620	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1310	SV * pathname
1311	int flags
1312	int mode
1313	SV * callback
1314	PROTOTYPE: $$$;$	621	PROTOTYPE: $$$;$
1315	PPCODE:	622	PPCODE:
1316	{	623	{
1317	dREQ;	624	dREQ;
1318		625
1319	req->type = REQ_OPEN;	626	req->type = EIO_OPEN;
1320	req->sv1 = newSVsv (pathname);	627	req->sv1 = newSVsv (pathname);
1321	req->ptr1 = SvPVbyte_nolen (pathname);	628	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	req->int1 = flags;	629	req->int1 = flags;
1323	req->mode = mode;	630	req->int2 = mode;
1324		631
1325	REQ_SEND;	632	REQ_SEND;
1326	}	633	}
1327		634
1328	void	635	void
1329	aio_close (fh,callback=&PL_sv_undef)	636	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1330	SV * fh
1331	SV * callback
1332	PROTOTYPE: $;$	637	PROTOTYPE: $;$
1333	ALIAS:	638	ALIAS:
1334	aio_close = REQ_CLOSE
1335	aio_fsync = REQ_FSYNC	639	aio_fsync = EIO_FSYNC
1336	aio_fdatasync = REQ_FDATASYNC	640	aio_fdatasync = EIO_FDATASYNC
1337	PPCODE:	641	PPCODE:
1338	{	642	{
		643	int fd = s_fileno_croak (fh, 0);
1339	dREQ;	644	dREQ;
1340		645
1341	req->type = ix;	646	req->type = ix;
1342	req->fh = newSVsv (fh);	647	req->sv1 = newSVsv (fh);
1343	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	648	req->int1 = fd;
1344		649
1345	REQ_SEND (req);	650	REQ_SEND (req);
1346	}	651	}
1347		652
1348	void	653	void
		654	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		655	PROTOTYPE: $$$$;$
		656	PPCODE:
		657	{
		658	int fd = s_fileno_croak (fh, 0);
		659	dREQ;
		660
		661	req->type = EIO_SYNC_FILE_RANGE;
		662	req->sv1 = newSVsv (fh);
		663	req->int1 = fd;
		664	req->offs = offset;
		665	req->size = nbytes;
		666	req->int2 = flags;
		667
		668	REQ_SEND (req);
		669	}
		670
		671	void
		672	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $;$
		674	PPCODE:
		675	{
		676	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		677	int fd = s_fileno_croak (fh, 0);
		678	dREQ;
		679
		680	if (close_pipe < 0)
		681	{
		682	int pipefd [2];
		683
		684	if (pipe (pipefd) < 0
		685	|| close (pipefd [1]) < 0
		686	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		687	abort (); /*D*/
		688
		689	close_pipe = pipefd [0];
		690	}
		691
		692	req->type = EIO_DUP2;
		693	req->int1 = close_pipe;
		694	req->sv2 = newSVsv (fh);
		695	req->int2 = fd;
		696
		697	REQ_SEND (req);
		698	}
		699
		700	void
1349	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	701	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1350	SV * fh
1351	UV offset
1352	UV length
1353	SV * data
1354	UV dataoffset
1355	SV * callback
1356	ALIAS:	702	ALIAS:
1357	aio_read = REQ_READ	703	aio_read = EIO_READ
1358	aio_write = REQ_WRITE	704	aio_write = EIO_WRITE
1359	PROTOTYPE: $$$$$;$	705	PROTOTYPE: $$$$$;$
1360	PPCODE:	706	PPCODE:
1361	{	707	{
1362	STRLEN svlen;	708	STRLEN svlen;
		709	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1363	char *svptr = SvPVbyte (data, svlen);	710	char *svptr = SvPVbyte (data, svlen);
1364		711	UV len = SvUV (length);
1365	SvUPGRADE (data, SVt_PV);
1366	SvPOK_on (data);
1367		712
1368	if (dataoffset < 0)	713	if (dataoffset < 0)
1369	dataoffset += svlen;	714	dataoffset += svlen;
1370		715
1371	if (dataoffset < 0 || dataoffset > svlen)	716	if (dataoffset < 0 || dataoffset > svlen)
1372	croak ("data offset outside of string");	717	croak ("dataoffset outside of data scalar");
1373		718
1374	if (ix == REQ_WRITE)	719	if (ix == EIO_WRITE)
1375	{	720	{
1376	/* write: check length and adjust. */	721	/* write: check length and adjust. */
1377	if (length < 0 || length + dataoffset > svlen)	722	if (!SvOK (length) || len + dataoffset > svlen)
1378	length = svlen - dataoffset;	723	len = svlen - dataoffset;
1379	}	724	}
1380	else	725	else
1381	{	726	{
1382	/* read: grow scalar as necessary */	727	/* read: check type and grow scalar as necessary */
		728	SvUPGRADE (data, SVt_PV);
1383	svptr = SvGROW (data, length + dataoffset);	729	svptr = SvGROW (data, len + dataoffset + 1);
1384	}	730	}
1385
1386	if (length < 0)
1387	croak ("length must not be negative");
1388		731
1389	{	732	{
1390	dREQ;	733	dREQ;
1391		734
1392	req->type = ix;	735	req->type = ix;
1393	req->fh = newSVsv (fh);	736	req->sv1 = newSVsv (fh);
1394	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	737	req->int1 = fd;
1395	: IoOFP (sv_2io (fh)));	738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1396	req->offs = offset;
1397	req->size = length;	739	req->size = len;
1398	req->sv1 = SvREFCNT_inc (data);	740	req->sv2 = SvREFCNT_inc (data);
1399	req->ptr1 = (char *)svptr + dataoffset;	741	req->ptr2 = (char *)svptr + dataoffset;
1400	req->stroffset = dataoffset;	742	req->stroffset = dataoffset;
1401		743
1402	if (!SvREADONLY (data))	744	if (!SvREADONLY (data))
1403	{	745	{
1404	SvREADONLY_on (data);	746	SvREADONLY_on (data);
1405	req->flags |= FLAG_DATA_RO_OFF;	747	req->flags |= FLAG_SV2_RO_OFF;
1406	}	748	}
1407		749
1408	REQ_SEND;	750	REQ_SEND;
1409	}	751	}
1410	}	752	}
1411		753
1412	void	754	void
1413	aio_readlink (path,callback=&PL_sv_undef)	755	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1414	SV * path
1415	SV * callback
1416	PROTOTYPE: $$;$	756	PROTOTYPE: $$;$
1417	PPCODE:	757	PPCODE:
1418	{	758	{
1419	SV *data;	759	SV *data;
1420	dREQ;	760	dREQ;
1421		761
1422	data = newSV (NAME_MAX);
1423	SvPOK_on (data);
1424
1425	req->type = REQ_READLINK;	762	req->type = EIO_READLINK;
1426	req->fh = newSVsv (path);	763	req->sv1 = newSVsv (path);
1427	req->ptr2 = SvPVbyte_nolen (path);
1428	req->sv1 = data;
1429	req->ptr1 = SvPVbyte_nolen (data);	764	req->ptr1 = SvPVbyte_nolen (req->sv1);
1430		765
1431	REQ_SEND;	766	REQ_SEND;
1432	}	767	}
1433		768
1434	void	769	void
1435	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	770	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1436	SV * out_fh
1437	SV * in_fh
1438	UV in_offset
1439	UV length
1440	SV * callback
1441	PROTOTYPE: $$$$;$	771	PROTOTYPE: $$$$;$
1442	PPCODE:	772	PPCODE:
1443	{	773	{
		774	int ifd = s_fileno_croak (in_fh , 0);
		775	int ofd = s_fileno_croak (out_fh, 1);
1444	dREQ;	776	dREQ;
1445		777
1446	req->type = REQ_SENDFILE;	778	req->type = EIO_SENDFILE;
1447	req->fh = newSVsv (out_fh);	779	req->sv1 = newSVsv (out_fh);
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	780	req->int1 = ofd;
1449	req->sv2 = newSVsv (in_fh);	781	req->sv2 = newSVsv (in_fh);
1450	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	782	req->int2 = ifd;
1451	req->offs = in_offset;	783	req->offs = in_offset;
1452	req->size = length;	784	req->size = length;
1453		785
1454	REQ_SEND;	786	REQ_SEND;
1455	}	787	}
1456		788
1457	void	789	void
1458	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	790	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1459	SV * fh
1460	UV offset
1461	IV length
1462	SV * callback
1463	PROTOTYPE: $$$;$	791	PROTOTYPE: $$$;$
1464	PPCODE:	792	PPCODE:
1465	{	793	{
		794	int fd = s_fileno_croak (fh, 0);
1466	dREQ;	795	dREQ;
1467		796
1468	req->type = REQ_READAHEAD;	797	req->type = EIO_READAHEAD;
1469	req->fh = newSVsv (fh);	798	req->sv1 = newSVsv (fh);
1470	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	799	req->int1 = fd;
1471	req->offs = offset;	800	req->offs = offset;
1472	req->size = length;	801	req->size = length;
1473		802
1474	REQ_SEND;	803	REQ_SEND;
1475	}	804	}
1476		805
1477	void	806	void
1478	aio_stat (fh_or_path,callback=&PL_sv_undef)	807	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1479	SV * fh_or_path
1480	SV * callback
1481	ALIAS:	808	ALIAS:
1482	aio_stat = REQ_STAT	809	aio_stat = EIO_STAT
1483	aio_lstat = REQ_LSTAT	810	aio_lstat = EIO_LSTAT
1484	PPCODE:	811	PPCODE:
1485	{	812	{
1486	dREQ;	813	dREQ;
1487		814
1488	New (0, req->statdata, 1, Stat_t);	815	req->sv1 = newSVsv (fh_or_path);
1489	if (!req->statdata)
1490	{
1491	req_free (req);
1492	croak ("out of memory during aio_req->statdata allocation");
1493	}
1494		816
1495	if (SvPOK (fh_or_path))	817	if (SvPOK (req->sv1))
1496	{	818	{
1497	req->type = ix;	819	req->type = ix;
1498	req->sv1 = newSVsv (fh_or_path);
1499	req->ptr1 = SvPVbyte_nolen (fh_or_path);	820	req->ptr1 = SvPVbyte_nolen (req->sv1);
1500	}	821	}
1501	else	822	else
1502	{	823	{
1503	req->type = REQ_FSTAT;	824	req->type = EIO_FSTAT;
1504	req->fh = newSVsv (fh_or_path);
1505	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	825	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1506	}	826	}
1507		827
1508	REQ_SEND;	828	REQ_SEND;
1509	}	829	}
1510		830
1511	void	831	void
		832	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		833	PPCODE:
		834	{
		835	dREQ;
		836
		837	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		838	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = EIO_UTIME;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FUTIME;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->sv1 = newSVsv (fh_or_path);
		862	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		863
		864	if (SvPOK (req->sv1))
		865	{
		866	req->type = EIO_TRUNCATE;
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	}
		869	else
		870	{
		871	req->type = EIO_FTRUNCATE;
		872	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		873	}
		874
		875	REQ_SEND;
		876	}
		877
		878	void
		879	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		880	ALIAS:
		881	aio_chmod = EIO_CHMOD
		882	aio_mkdir = EIO_MKDIR
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->int2 = mode;
		888	req->sv1 = newSVsv (fh_or_path);
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = ix;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FCHMOD;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		906	PPCODE:
		907	{
		908	dREQ;
		909
		910	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		911	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		912	req->sv1 = newSVsv (fh_or_path);
		913
		914	if (SvPOK (req->sv1))
		915	{
		916	req->type = EIO_CHOWN;
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	}
		919	else
		920	{
		921	req->type = EIO_FCHOWN;
		922	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		923	}
		924
		925	REQ_SEND;
		926	}
		927
		928	void
		929	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		930	PPCODE:
		931	{
		932	dREQ;
		933
		934	req->type = EIO_READDIR;
		935	req->sv1 = newSVsv (pathname);
		936	req->ptr1 = SvPVbyte_nolen (req->sv1);
		937	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		938
		939	if (flags & EIO_READDIR_DENTS)
		940	req->int1 |= EIO_READDIR_CUSTOM2;
		941
		942	REQ_SEND;
		943	}
		944
		945	void
1512	aio_unlink (pathname,callback=&PL_sv_undef)	946	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1513	SV * pathname
1514	SV * callback
1515	ALIAS:	947	ALIAS:
1516	aio_unlink = REQ_UNLINK	948	aio_unlink = EIO_UNLINK
1517	aio_rmdir = REQ_RMDIR	949	aio_rmdir = EIO_RMDIR
1518	aio_readdir = REQ_READDIR	950	aio_readdir = EIO_READDIR
1519	PPCODE:	951	PPCODE:
1520	{	952	{
1521	dREQ;	953	dREQ;
1522		954
1523	req->type = ix;	955	req->type = ix;
1524	req->sv1 = newSVsv (pathname);	956	req->sv1 = newSVsv (pathname);
1525	req->ptr1 = SvPVbyte_nolen (pathname);	957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958
		959	REQ_SEND;
		960	}
		961
		962	void
		963	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		964	ALIAS:
		965	aio_link = EIO_LINK
		966	aio_symlink = EIO_SYMLINK
		967	aio_rename = EIO_RENAME
		968	PPCODE:
		969	{
		970	dREQ;
		971
		972	req->type = ix;
		973	req->sv1 = newSVsv (oldpath);
		974	req->ptr1 = SvPVbyte_nolen (req->sv1);
		975	req->sv2 = newSVsv (newpath);
		976	req->ptr2 = SvPVbyte_nolen (req->sv2);
1526		977
1527	REQ_SEND;	978	REQ_SEND;
1528	}	979	}
1529		980
1530	void	981	void
1531	aio_link (oldpath,newpath,callback=&PL_sv_undef)	982	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1532	SV * oldpath
1533	SV * newpath
1534	SV * callback
1535	ALIAS:
1536	aio_link = REQ_LINK
1537	aio_symlink = REQ_SYMLINK
1538	aio_rename = REQ_RENAME
1539	PPCODE:	983	PPCODE:
1540	{	984	{
1541	dREQ;	985	dREQ;
1542		986
1543	req->type = ix;
1544	req->fh = newSVsv (oldpath);
1545	req->ptr2 = SvPVbyte_nolen (req->fh);
1546	req->sv1 = newSVsv (newpath);
1547	req->ptr1 = SvPVbyte_nolen (newpath);
1548
1549	REQ_SEND;
1550	}
1551
1552	void
1553	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1554	SV * pathname
1555	SV * callback
1556	UV mode
1557	UV dev
1558	PPCODE:
1559	{
1560	dREQ;
1561
1562	req->type = REQ_MKNOD;	987	req->type = EIO_MKNOD;
1563	req->sv1 = newSVsv (pathname);	988	req->sv1 = newSVsv (pathname);
1564	req->ptr1 = SvPVbyte_nolen (pathname);	989	req->ptr1 = SvPVbyte_nolen (req->sv1);
1565	req->mode = (mode_t)mode;	990	req->int2 = (mode_t)mode;
1566	req->offs = dev;	991	req->offs = dev;
1567		992
1568	REQ_SEND;	993	REQ_SEND;
1569	}	994	}
1570		995
1571	void	996	void
1572	aio_busy (delay,callback=&PL_sv_undef)	997	aio_busy (double delay, SV *callback=&PL_sv_undef)
1573	double delay
1574	SV * callback
1575	PPCODE:	998	PPCODE:
1576	{	999	{
1577	dREQ;	1000	dREQ;
1578		1001
1579	req->type = REQ_BUSY;	1002	req->type = EIO_BUSY;
1580	req->int1 = delay < 0. ? 0 : delay;	1003	req->nv1 = delay < 0. ? 0. : delay;
1581	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1582		1004
1583	REQ_SEND;	1005	REQ_SEND;
1584	}	1006	}
1585		1007
1586	void	1008	void
1587	aio_group (callback=&PL_sv_undef)	1009	aio_group (SV *callback=&PL_sv_undef)
1588	SV * callback
1589	PROTOTYPE: ;$	1010	PROTOTYPE: ;$
1590	PPCODE:	1011	PPCODE:
1591	{	1012	{
1592	dREQ;	1013	dREQ;
1593		1014
1594	req->type = REQ_GROUP;	1015	req->type = EIO_GROUP;
1595		1016
1596	req_send (req);	1017	req_submit (req);
1597	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1018	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1598	}	1019	}
1599		1020
1600	void	1021	void
1601	aio_nop (callback=&PL_sv_undef)	1022	aio_nop (SV *callback=&PL_sv_undef)
1602	SV * callback	1023	ALIAS:
		1024	aio_nop = EIO_NOP
		1025	aio_sync = EIO_SYNC
1603	PPCODE:	1026	PPCODE:
1604	{	1027	{
1605	dREQ;	1028	dREQ;
1606		1029
1607	req->type = REQ_NOP;	1030	req->type = ix;
1608		1031
1609	REQ_SEND;	1032	REQ_SEND;
1610	}	1033	}
1611		1034
1612	int	1035	int
1613	aioreq_pri (int pri = 0)	1036	aioreq_pri (int pri = 0)
1614	PROTOTYPE: ;$	1037	PROTOTYPE: ;$
1615	CODE:	1038	CODE:
1616	RETVAL = next_pri - PRI_BIAS;	1039	RETVAL = next_pri;
1617	if (items > 0)	1040	if (items > 0)
1618	{	1041	{
1619	if (pri < PRI_MIN) pri = PRI_MIN;	1042	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1620	if (pri > PRI_MAX) pri = PRI_MAX;	1043	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1621	next_pri = pri + PRI_BIAS;	1044	next_pri = pri;
1622	}	1045	}
1623	OUTPUT:	1046	OUTPUT:
1624	RETVAL	1047	RETVAL
1625		1048
1626	void	1049	void
1627	aioreq_nice (int nice = 0)	1050	aioreq_nice (int nice = 0)
1628	CODE:	1051	CODE:
1629	nice = next_pri - nice;	1052	nice = next_pri - nice;
1630	if (nice < PRI_MIN) nice = PRI_MIN;	1053	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1631	if (nice > PRI_MAX) nice = PRI_MAX;	1054	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1632	next_pri = nice + PRI_BIAS;	1055	next_pri = nice;
1633		1056
1634	void	1057	void
1635	flush ()	1058	flush ()
1636	PROTOTYPE:	1059	PROTOTYPE:
1637	CODE:	1060	CODE:
1638	while (nreqs)	1061	while (eio_nreqs ())
1639	{	1062	{
1640	poll_wait ();	1063	poll_wait ();
1641	poll_cb (0);	1064	poll_cb ();
1642	}	1065	}
1643		1066
1644	void	1067	int
1645	poll()	1068	poll()
1646	PROTOTYPE:	1069	PROTOTYPE:
1647	CODE:	1070	CODE:
1648	if (nreqs)
1649	{
1650	poll_wait ();	1071	poll_wait ();
1651	poll_cb (0);	1072	RETVAL = poll_cb ();
1652	}	1073	OUTPUT:
		1074	RETVAL
1653		1075
1654	int	1076	int
1655	poll_fileno()	1077	poll_fileno()
1656	PROTOTYPE:	1078	PROTOTYPE:
1657	CODE:	1079	CODE:
1658	RETVAL = respipe [0];	1080	RETVAL = s_epipe_fd (&respipe);
1659	OUTPUT:	1081	OUTPUT:
1660	RETVAL	1082	RETVAL
1661		1083
1662	int	1084	int
1663	poll_cb(...)	1085	poll_cb(...)
…		…
1669		1091
1670	void	1092	void
1671	poll_wait()	1093	poll_wait()
1672	PROTOTYPE:	1094	PROTOTYPE:
1673	CODE:	1095	CODE:
1674	if (nreqs)
1675	poll_wait ();	1096	poll_wait ();
1676		1097
1677	int	1098	int
1678	nreqs()	1099	nreqs()
1679	PROTOTYPE:	1100	PROTOTYPE:
1680	CODE:	1101	CODE:
1681	RETVAL = nreqs;	1102	RETVAL = eio_nreqs ();
1682	OUTPUT:	1103	OUTPUT:
1683	RETVAL	1104	RETVAL
1684		1105
1685	int	1106	int
1686	nready()	1107	nready()
1687	PROTOTYPE:	1108	PROTOTYPE:
1688	CODE:	1109	CODE:
1689	RETVAL = get_nready ();	1110	RETVAL = eio_nready ();
1690	OUTPUT:	1111	OUTPUT:
1691	RETVAL	1112	RETVAL
1692		1113
1693	int	1114	int
1694	npending()	1115	npending()
1695	PROTOTYPE:	1116	PROTOTYPE:
1696	CODE:	1117	CODE:
1697	RETVAL = get_npending ();	1118	RETVAL = eio_npending ();
1698	OUTPUT:	1119	OUTPUT:
1699	RETVAL	1120	RETVAL
1700		1121
1701	int	1122	int
1702	nthreads()	1123	nthreads()
1703	PROTOTYPE:	1124	PROTOTYPE:
1704	CODE:	1125	CODE:
1705	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1126	RETVAL = eio_nthreads ();
1706	RETVAL = started;
1707	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1708	OUTPUT:	1127	OUTPUT:
1709	RETVAL	1128	RETVAL
1710		1129
		1130	int
		1131	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1132	PROTOTYPE: $$$$
		1133	CODE:
		1134	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1135	RETVAL = posix_fadvise (fh, offset, length, advice);
		1136	#else
		1137	RETVAL = errno = ENOSYS;
		1138	#endif
		1139	OUTPUT:
		1140	RETVAL
		1141
		1142	ssize_t
		1143	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1144	PROTOTYPE: $$$$
		1145	CODE:
		1146	eio_sendfile_sync (ofh, ifh, offset, count);
		1147
		1148	void _on_next_submit (SV *cb)
		1149	CODE:
		1150	SvREFCNT_dec (on_next_submit);
		1151	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1152
1711	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
1712		1154
1713	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1155	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1714		1156
1715	void	1157	void
1716	cancel (aio_req_ornot req)	1158	cancel (aio_req_ornot req)
1717	CODE:	1159	CODE:
1718	req_cancel (req);	1160	eio_cancel (req);
1719		1161
1720	void	1162	void
1721	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1163	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1722	CODE:	1164	PPCODE:
		1165	{
		1166	if (GIMME_V != G_VOID)
		1167	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1168
		1169	if (items > 1)
		1170	{
		1171	SV *cb_cv =get_cb (callback);
		1172
1723	SvREFCNT_dec (req->callback);	1173	SvREFCNT_dec (req->callback);
1724	req->callback = newSVsv (callback);	1174	req->callback = SvREFCNT_inc (cb_cv);
		1175	}
		1176	}
1725		1177
1726	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1178	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1727		1179
1728	void	1180	void
1729	add (aio_req grp, ...)	1181	add (aio_req grp, ...)
1730	PPCODE:	1182	PPCODE:
1731	{	1183	{
1732	int i;	1184	int i;
1733	aio_req req;
1734		1185
1735	if (grp->int1 == 2)	1186	if (grp->int1 == 2)
1736	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1187	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1737		1188
1738	for (i = 1; i < items; ++i )	1189	for (i = 1; i < items; ++i )
1739	{	1190	{
		1191	aio_req req;
		1192
1740	if (GIMME_V != G_VOID)	1193	if (GIMME_V != G_VOID)
1741	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1194	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1742		1195
1743	req = SvAIO_REQ (ST (i));	1196	req = SvAIO_REQ (ST (i));
1744		1197
1745	if (req)	1198	if (req)
1746	{	1199	eio_grp_add (grp, req);
1747	++grp->size;
1748	req->grp = grp;
1749
1750	req->grp_prev = 0;
1751	req->grp_next = grp->grp_first;
1752
1753	if (grp->grp_first)
1754	grp->grp_first->grp_prev = req;
1755
1756	grp->grp_first = req;
1757	}
1758	}	1200	}
1759	}	1201	}
1760		1202
1761	void	1203	void
1762	cancel_subs (aio_req_ornot req)	1204	cancel_subs (aio_req_ornot req)
…		…
1771	AV *av;	1213	AV *av;
1772		1214
1773	grp->errorno = errno;	1215	grp->errorno = errno;
1774		1216
1775	av = newAV ();	1217	av = newAV ();
		1218	av_extend (av, items - 1);
1776		1219
1777	for (i = 1; i < items; ++i )	1220	for (i = 1; i < items; ++i )
1778	av_push (av, newSVsv (ST (i)));	1221	av_push (av, newSVsv (ST (i)));
1779		1222
1780	SvREFCNT_dec (grp->sv1);	1223	SvREFCNT_dec (grp->sv1);
…		…
1787	grp->errorno = errorno;	1230	grp->errorno = errorno;
1788		1231
1789	void	1232	void
1790	limit (aio_req grp, int limit)	1233	limit (aio_req grp, int limit)
1791	CODE:	1234	CODE:
1792	grp->int2 = limit;	1235	eio_grp_limit (grp, limit);
1793	aio_grp_feed (grp);
1794		1236
1795	void	1237	void
1796	feed (aio_req grp, SV *callback=&PL_sv_undef)	1238	feed (aio_req grp, SV *callback=&PL_sv_undef)
1797	CODE:	1239	CODE:
1798	{	1240	{
1799	SvREFCNT_dec (grp->sv2);	1241	SvREFCNT_dec (grp->sv2);
1800	grp->sv2 = newSVsv (callback);	1242	grp->sv2 = newSVsv (callback);
		1243	grp->feed = aio_grp_feed;
1801		1244
1802	if (grp->int2 <= 0)	1245	if (grp->int2 <= 0)
1803	grp->int2 = 2;	1246	grp->int2 = 2;
1804		1247
1805	aio_grp_feed (grp);	1248	eio_grp_limit (grp, grp->int2);
1806	}	1249	}
1807		1250

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