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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.96 by root, Sat Dec 23 04:49:37 2006 UTC vs.
Revision 1.128 by root, Tue Sep 30 14:07:59 2008 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"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
22	#include <stdlib.h>	10	#include <stdlib.h>
23	#include <errno.h>	11	#include <errno.h>
24	#include <sys/time.h>
25	#include <sys/select.h>
26	#include <sys/types.h>	12	#include <sys/types.h>
27	#include <sys/stat.h>	13	#include <sys/stat.h>
28	#include <limits.h>	14	#include <limits.h>
29	#include <unistd.h>
30	#include <fcntl.h>	15	#include <fcntl.h>
31	#include <signal.h>
32	#include <sched.h>	16	#include <sched.h>
33		17
34	#if HAVE_SENDFILE	18	/* perl namespace pollution */
35	# if __linux	19	#undef VERSION
36	# include <sys/sendfile.h>	20
37	# elif __freebsd	21	#ifdef _WIN32
38	# include <sys/socket.h>	22
39	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
40	# elif __hpux	24	# undef malloc
41	# include <sys/socket.h>	25	# undef free
42	# elif __solaris /* not yet */	26
43	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
44	# else	59	#else
45	# error sendfile support requested but not available	60
46	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
47	#endif	68	#endif
48		69
49	/* number of seconds after which idle threads exit */	70	/* perl stupidly overrides readdir and maybe others */
50	#define IDLE_TIMEOUT 10	71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
51		75
52	/* used for struct dirent, AIX doesn't provide it */	76	#define EIO_STRUCT_STAT Stat_t
53	#ifndef NAME_MAX	77
54	# define NAME_MAX 4096	78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
55	#endif	83	#endif
56		84
57	#ifndef PTHREAD_STACK_MIN	85	/*****************************************************************************/
58	/* care for broken platforms, e.g. windows */	86
59	# define PTHREAD_STACK_MIN 16384	87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
60	#endif	91	#endif
61		92
62	#if __ia64	93	#define expect_false(expr) expect ((expr) != 0, 0)
63	# define STACKSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
65	# define STACKSIZE PTHREAD_STACK_MIN
66	#else
67	# define STACKSIZE 16384
68	#endif
69		95
70	/* wether word reads are potentially non-atomic.	96	/*****************************************************************************/
71	* this is conservatice, likely most arches this runs
72	* on have atomic word read/writes.
73	*/
74	#ifndef WORDACCESS_UNSAFE
75	# if __i386 || __x86_64
76	# define WORDACCESS_UNSAFE 0
77	# else
78	# define WORDACCESS_UNSAFE 1
79	# endif
80	#endif
81		97
82	/* buffer size for various temporary buffers */	98	static HV *stash;
83	#define AIO_BUFSIZE 65536
84
85	#define dBUF \
86	char *aio_buf; \
87	LOCK (wrklock); \
88	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
89	UNLOCK (wrklock); \
90	if (!aio_buf) \
91	return -1;
92
93	typedef SV SV8; /* byte-sv, used for argument-checking */	99	typedef SV SV8; /* byte-sv, used for argument-checking */
94
95	enum {
96	REQ_QUIT,
97	REQ_OPEN, REQ_CLOSE,
98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
99	REQ_SENDFILE,
100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
101	REQ_FSYNC, REQ_FDATASYNC,
102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
103	REQ_MKNOD, REQ_READDIR,
104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
105	REQ_GROUP, REQ_NOP,
106	REQ_BUSY,
107	};
108		100
109	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
110	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
111		103
112	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
113	{
114	struct aio_cb *volatile next;
115
116	SV *callback, *fh;	105	SV *callback; \
117	SV *sv1, *sv2;	106	SV *sv1, *sv2; \
118	void *ptr1, *ptr2;
119	off_t offs;
120	size_t size;
121	ssize_t result;
122
123	STRLEN stroffset;	107	STRLEN stroffset; \
124	int type;	108	SV *self;
125	int int1, int2;
126	int errorno;
127	mode_t mode; /* open */
128		109
129	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
130	unsigned char pri;
131		111
132	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
134	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
135		120
136	enum {	121	enum {
137	FLAG_CANCELLED = 0x01, /* request was cancelled */
138	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */	122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
139	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
140	};	123	};
141		124
		125	#include "libeio/eio.c"
		126
142	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
143	typedef aio_cb *aio_req_ornot;	128	typedef eio_req *aio_req_ornot;
144		129
145	enum {	130	static SV *on_next_submit;
146	PRI_MIN = -4,	131	static int next_pri = EIO_PRI_DEFAULT;
147	PRI_MAX = 4,	132	static int max_outstanding;
148		133
149	DEFAULT_PRI = 0,	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
150	PRI_BIAS = -PRI_MIN,
151	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
152	};
153		135
154	#define AIO_TICKS ((1000000 + 1023) >> 10)
155
156	static unsigned int max_poll_time = 0;
157	static unsigned int max_poll_reqs = 0;
158
159	/* calculcate time difference in ~1/AIO_TICKS of a second */
160	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
161	{
162	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
163	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
164	}
165
166	static pthread_t main_tid;
167	static int main_sig;
168	static int block_sig_level;
169
170	void block_sig ()
171	{
172	sigset_t ss;
173
174	if (block_sig_level++)
175	return;
176
177	if (!main_sig)
178	return;
179
180	sigemptyset (&ss);
181	sigaddset (&ss, main_sig);
182	pthread_sigmask (SIG_BLOCK, &ss, 0);
183	}
184
185	void unblock_sig ()
186	{
187	sigset_t ss;
188
189	if (--block_sig_level)
190	return;
191
192	if (!main_sig)
193	return;
194
195	sigemptyset (&ss);
196	sigaddset (&ss, main_sig);
197	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
198	}
199
200	static int next_pri = DEFAULT_PRI + PRI_BIAS;
201
202	static unsigned int started, idle, wanted;
203
204	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
205	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
206	#else
207	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
208	#endif
209
210	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
211	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
212
213	/* worker threads management */
214	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
215
216	typedef struct worker {
217	/* locked by wrklock */
218	struct worker *prev, *next;
219
220	pthread_t tid;
221
222	/* locked by reslock, reqlock or wrklock */
223	aio_req req; /* currently processed request */
224	void *dbuf;
225	DIR *dirp;
226	} worker;
227
228	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
229
230	static void worker_clear (worker *wrk)
231	{
232	if (wrk->dirp)
233	{
234	closedir (wrk->dirp);
235	wrk->dirp = 0;
236	}
237
238	if (wrk->dbuf)
239	{
240	free (wrk->dbuf);
241	wrk->dbuf = 0;
242	}
243	}
244
245	static void worker_free (worker *wrk)
246	{
247	wrk->next->prev = wrk->prev;
248	wrk->prev->next = wrk->next;
249
250	free (wrk);
251	}
252
253	static volatile unsigned int nreqs, nready, npending;
254	static volatile unsigned int max_idle = 4;
255	static volatile unsigned int max_outstanding = 0xffffffff;
256	static int respipe [2];
257
258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
261
262	#if WORDACCESS_UNSAFE
263
264	static unsigned int get_nready ()
265	{
266	unsigned int retval;
267
268	LOCK (reqlock);
269	retval = nready;
270	UNLOCK (reqlock);
271
272	return retval;
273	}
274
275	static unsigned int get_npending ()
276	{
277	unsigned int retval;
278
279	LOCK (reslock);
280	retval = npending;
281	UNLOCK (reslock);
282
283	return retval;
284	}
285
286	static unsigned int get_nthreads ()
287	{
288	unsigned int retval;
289
290	LOCK (wrklock);
291	retval = started;
292	UNLOCK (wrklock);
293
294	return retval;
295	}
296
297	#else
298
299	# define get_nready() nready
300	# define get_npending() npending
301	# define get_nthreads() started
302
303	#endif
304
305	/*
306	* a somewhat faster data structure might be nice, but
307	* with 8 priorities this actually needs <20 insns
308	* per shift, the most expensive operation.
309	*/
310	typedef struct {
311	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
312	int size;
313	} reqq;
314
315	static reqq req_queue;
316	static reqq res_queue;
317
318	int reqq_push (reqq *q, aio_req req)
319	{
320	int pri = req->pri;
321	req->next = 0;
322
323	if (q->qe[pri])
324	{
325	q->qe[pri]->next = req;
326	q->qe[pri] = req;
327	}
328	else
329	q->qe[pri] = q->qs[pri] = req;
330
331	return q->size++;
332	}
333
334	aio_req reqq_shift (reqq *q)
335	{
336	int pri;
337
338	if (!q->size)
339	return 0;
340
341	--q->size;
342
343	for (pri = NUM_PRI; pri--; )
344	{
345	aio_req req = q->qs[pri];
346
347	if (req)
348	{
349	if (!(q->qs[pri] = req->next))
350	q->qe[pri] = 0;
351
352	return req;
353	}
354	}
355
356	abort ();
357	}
358
359	static int poll_cb ();
360	static int req_invoke (aio_req req);
361	static void req_free (aio_req req);	136	static void req_destroy (aio_req req);
362	static void req_cancel (aio_req req);	137	static void req_cancel (aio_req req);
		138
		139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
363		152
364	/* must be called at most once */	153	/* must be called at most once */
365	static SV *req_sv (aio_req req, const char *klass)	154	static SV *req_sv (aio_req req, const char *klass)
366	{	155	{
367	if (!req->self)	156	if (!req->self)
…		…
385	return mg ? (aio_req)mg->mg_ptr : 0;	174	return mg ? (aio_req)mg->mg_ptr : 0;
386	}	175	}
387		176
388	static void aio_grp_feed (aio_req grp)	177	static void aio_grp_feed (aio_req grp)
389	{	178	{
390	block_sig ();	179	if (grp->sv2 && SvOK (grp->sv2))
391
392	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
393	{	180	{
394	int old_len = grp->size;
395
396	if (grp->sv2 && SvOK (grp->sv2))
397	{
398	dSP;	181	dSP;
399		182
400	ENTER;	183	ENTER;
401	SAVETMPS;	184	SAVETMPS;
402	PUSHMARK (SP);	185	PUSHMARK (SP);
403	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
404	PUTBACK;	187	PUTBACK;
405	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
406	SPAGAIN;	189	SPAGAIN;
407	FREETMPS;	190	FREETMPS;
408	LEAVE;	191	LEAVE;
409	}
410
411	/* stop if no progress has been made */
412	if (old_len == grp->size)
413	{
414	SvREFCNT_dec (grp->sv2);
415	grp->sv2 = 0;
416	break;
417	}
418	}	192	}
419
420	unblock_sig ();
421	}	193	}
422		194
423	static void aio_grp_dec (aio_req grp)	195	static void req_submit (eio_req *req)
424	{	196	{
425	--grp->size;	197	eio_submit (req);
426		198
427	/* call feeder, if applicable */	199	if (expect_false (on_next_submit))
428	aio_grp_feed (grp);
429
430	/* finish, if done */
431	if (!grp->size && grp->int1)
432	{	200	{
433	block_sig ();	201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
434		203
435	if (!req_invoke (grp))	204	on_next_submit = 0;
436	{
437	req_free (grp);
438	unblock_sig ();
439	croak (0);
440	}
441		205
442	req_free (grp);	206	PUSHMARK (SP);
443	unblock_sig ();	207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
444	}	209	}
445	}	210	}
446		211
447	static int req_invoke (aio_req req)	212	static int req_invoke (eio_req *req)
448	{	213	{
449	dSP;	214	dSP;
450		215
451	if (req->flags & FLAG_SV1_RO_OFF)	216	if (req->flags & FLAG_SV2_RO_OFF)
452	SvREADONLY_off (req->sv1);	217	SvREADONLY_off (req->sv2);
453		218
454	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	219	if (!EIO_CANCELLED (req) && req->callback)
455	{	220	{
456	ENTER;	221	ENTER;
457	SAVETMPS;	222	SAVETMPS;
458	PUSHMARK (SP);	223	PUSHMARK (SP);
459	EXTEND (SP, 1);	224	EXTEND (SP, 1);
460		225
461	switch (req->type)	226	switch (req->type)
462	{	227	{
463	case REQ_READDIR:	228	case EIO_READDIR:
464	{	229	{
465	SV *rv = &PL_sv_undef;	230	SV *rv = &PL_sv_undef;
466		231
467	if (req->result >= 0)	232	if (req->result >= 0)
468	{	233	{
…		…
485		250
486	PUSHs (rv);	251	PUSHs (rv);
487	}	252	}
488	break;	253	break;
489		254
490	case REQ_OPEN:	255	case EIO_OPEN:
491	{	256	{
492	/* convert fd to fh */	257	/* convert fd to fh */
493	SV *fh;	258	SV *fh = &PL_sv_undef;
494		259
495	PUSHs (sv_2mortal (newSViv (req->result)));	260	if (req->result >= 0)
496	PUTBACK;	261	{
497	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	262	GV *gv = (GV *)sv_newmortal ();
498	SPAGAIN;	263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
499		269
500	fh = POPs;	270	symlen = snprintf (
501	PUSHMARK (SP);	271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
502	XPUSHs (fh);	282	PUSHs (fh);
503	}	283	}
504	break;	284	break;
505		285
506	case REQ_GROUP:	286	case EIO_GROUP:
507	req->int1 = 2; /* mark group as finished */	287	req->int1 = 2; /* mark group as finished */
508		288
509	if (req->sv1)	289	if (req->sv1)
510	{	290	{
511	int i;	291	int i;
…		…
515	for (i = 0; i <= AvFILL (av); ++i)	295	for (i = 0; i <= AvFILL (av); ++i)
516	PUSHs (*av_fetch (av, i, 0));	296	PUSHs (*av_fetch (av, i, 0));
517	}	297	}
518	break;	298	break;
519		299
520	case REQ_NOP:	300	case EIO_NOP:
521	case REQ_BUSY:	301	case EIO_BUSY:
522	break;	302	break;
523		303
524	case REQ_READLINK:	304	case EIO_READLINK:
525	if (req->result > 0)	305	if (req->result > 0)
526	{	306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
527	SvCUR_set (req->sv1, req->result);
528	*SvEND (req->sv1) = 0;
529	PUSHs (req->sv1);
530	}
531	break;	307	break;
532		308
533	case REQ_STAT:	309	case EIO_STAT:
534	case REQ_LSTAT:	310	case EIO_LSTAT:
535	case REQ_FSTAT:	311	case EIO_FSTAT:
536	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
537	PL_laststatval = req->result;	313	PL_laststatval = req->result;
538	PL_statcache = *(Stat_t *)(req->ptr2);	314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
539	PUSHs (sv_2mortal (newSViv (req->result)));	315	PUSHs (sv_2mortal (newSViv (req->result)));
540	break;	316	break;
541		317
542	case REQ_READ:	318	case EIO_READ:
543	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
544	*SvEND (req->sv1) = 0;	320	*SvEND (req->sv2) = 0;
545	PUSHs (sv_2mortal (newSViv (req->result)));	321	PUSHs (sv_2mortal (newSViv (req->result)));
546	break;	322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
547		328
548	default:	329	default:
549	PUSHs (sv_2mortal (newSViv (req->result)));	330	PUSHs (sv_2mortal (newSViv (req->result)));
550	break;	331	break;
551	}	332	}
552		333
553	errno = req->errorno;	334	errno = req->errorno;
554		335
555	PUTBACK;	336	PUTBACK;
556	call_sv (req->callback, G_VOID | G_EVAL);	337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
557	SPAGAIN;	338	SPAGAIN;
558		339
559	FREETMPS;	340	FREETMPS;
560	LEAVE;	341	LEAVE;
		342
		343	PUTBACK;
561	}	344	}
562		345
563	if (req->grp)
564	{
565	aio_req grp = req->grp;
566
567	/* unlink request */
568	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
569	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
570
571	if (grp->grp_first == req)
572	grp->grp_first = req->grp_next;
573
574	aio_grp_dec (grp);
575	}
576
577	return !SvTRUE (ERRSV);	346	return !!SvTRUE (ERRSV);
578	}	347	}
579		348
580	static void req_free (aio_req req)	349	static void req_destroy (aio_req req)
581	{	350	{
582	if (req->self)	351	if (req->self)
583	{	352	{
584	sv_unmagic (req->self, PERL_MAGIC_ext);	353	sv_unmagic (req->self, PERL_MAGIC_ext);
585	SvREFCNT_dec (req->self);	354	SvREFCNT_dec (req->self);
586	}	355	}
587		356
588	SvREFCNT_dec (req->fh);
589	SvREFCNT_dec (req->sv1);	357	SvREFCNT_dec (req->sv1);
590	SvREFCNT_dec (req->sv2);	358	SvREFCNT_dec (req->sv2);
591	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
592		360
593	if (req->flags & FLAG_PTR2_FREE)
594	free (req->ptr2);
595
596	Safefree (req);	361	Safefree (req);
597	}	362	}
598		363
599	static void req_cancel_subs (aio_req grp)	364	static void req_cancel_subs (aio_req grp)
600	{	365	{
601	aio_req sub;	366	aio_req sub;
602		367
603	if (grp->type != REQ_GROUP)	368	if (grp->type != EIO_GROUP)
604	return;	369	return;
605		370
606	SvREFCNT_dec (grp->sv2);	371	SvREFCNT_dec (grp->sv2);
607	grp->sv2 = 0;	372	grp->sv2 = 0;
608		373
609	for (sub = grp->grp_first; sub; sub = sub->grp_next)	374	eio_grp_cancel (grp);
610	req_cancel (sub);
611	}	375	}
612		376
613	static void req_cancel (aio_req req)	377	#ifdef USE_SOCKETS_AS_HANDLES
614	{	378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
615	req->flags |= FLAG_CANCELLED;	379	#else
616		380	# define TO_SOCKET(x) (x)
617	req_cancel_subs (req);
618	}
619
620	static void *aio_proc(void *arg);
621
622	static void start_thread (void)
623	{
624	sigset_t fullsigset, oldsigset;
625	pthread_attr_t attr;
626
627	worker *wrk = calloc (1, sizeof (worker));
628
629	if (!wrk)
630	croak ("unable to allocate worker thread data");
631
632	pthread_attr_init (&attr);
633	pthread_attr_setstacksize (&attr, STACKSIZE);
634	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
635	#ifdef PTHREAD_SCOPE_PROCESS
636	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
637	#endif	381	#endif
638		382
639	sigfillset (&fullsigset);	383	static void
		384	create_respipe (void)
		385	{
		386	int old_readfd = respipe [0];
640		387
641	LOCK (wrklock);	388	if (respipe [1] >= 0)
642	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);	389	respipe_close (TO_SOCKET (respipe [1]));
643		390
644	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
645	{	399	{
646	wrk->prev = &wrk_first;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
647	wrk->next = wrk_first.next;	401	croak ("unable to initialize result pipe(2)");
648	wrk_first.next->prev = wrk;	402
649	wrk_first.next = wrk;	403	respipe_close (respipe [0]);
650	++started;	404	respipe [0] = old_readfd;
651	}	405	}
652	else
653	free (wrk);
654		406
655	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);	407	#ifdef _WIN32
656	UNLOCK (wrklock);	408	int arg = 1;
657	}	409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
658		416
659	static void maybe_start_thread ()	417	respipe_osf [0] = TO_SOCKET (respipe [0]);
660	{	418	respipe_osf [1] = TO_SOCKET (respipe [1]);
661	if (get_nthreads () >= wanted)
662	return;
663
664	/* todo: maybe use idle here, but might be less exact */
665	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
666	return;
667
668	start_thread ();
669	}	419	}
670		420
671	static void req_send (aio_req req)
672	{
673	block_sig ();
674
675	++nreqs;
676
677	LOCK (reqlock);
678	++nready;
679	reqq_push (&req_queue, req);
680	pthread_cond_signal (&reqwait);
681	UNLOCK (reqlock);
682
683	unblock_sig ();
684
685	maybe_start_thread ();
686	}
687
688	static void end_thread (void)
689	{
690	aio_req req;
691
692	Newz (0, req, 1, aio_cb);
693
694	req->type = REQ_QUIT;
695	req->pri = PRI_MAX + PRI_BIAS;
696
697	LOCK (reqlock);
698	reqq_push (&req_queue, req);
699	pthread_cond_signal (&reqwait);
700	UNLOCK (reqlock);
701
702	LOCK (wrklock);
703	--started;
704	UNLOCK (wrklock);
705	}
706
707	static void set_max_idle (int nthreads)
708	{
709	if (WORDACCESS_UNSAFE) LOCK (reqlock);
710	max_idle = nthreads <= 0 ? 1 : nthreads;
711	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
712	}
713
714	static void min_parallel (int nthreads)
715	{
716	if (wanted < nthreads)
717	wanted = nthreads;
718	}
719
720	static void max_parallel (int nthreads)
721	{
722	if (wanted > nthreads)
723	wanted = nthreads;
724
725	while (started > wanted)
726	end_thread ();
727	}
728
729	static void poll_wait ()	421	static void poll_wait (void)
730	{	422	{
731	fd_set rfd;	423	fd_set rfd;
732		424
733	while (nreqs)	425	while (eio_nreqs ())
734	{	426	{
735	int size;	427	int size;
736	if (WORDACCESS_UNSAFE) LOCK (reslock);	428
		429	X_LOCK (reslock);
737	size = res_queue.size;	430	size = res_queue.size;
738	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	431	X_UNLOCK (reslock);
739		432
740	if (size)	433	if (size)
741	return;	434	return;
742		435
743	maybe_start_thread ();	436	etp_maybe_start_thread ();
744		437
745	FD_ZERO(&rfd);	438	FD_ZERO (&rfd);
746	FD_SET(respipe [0], &rfd);	439	FD_SET (respipe [0], &rfd);
747		440
748	select (respipe [0] + 1, &rfd, 0, 0, 0);	441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
749	}	442	}
750	}	443	}
751		444
752	static int poll_cb ()	445	static int poll_cb (void)
753	{	446	{
754	dSP;
755	int count = 0;
756	int maxreqs = max_poll_reqs;
757	int do_croak = 0;
758	struct timeval tv_start, tv_now;
759	aio_req req;
760
761	if (max_poll_time)
762	gettimeofday (&tv_start, 0);
763
764	block_sig ();
765
766	for (;;)	447	for (;;)
767	{	448	{
768	for (;;)	449	int res = eio_poll ();
769	{
770	maybe_start_thread ();
771		450
772	LOCK (reslock);	451	if (res > 0)
773	req = reqq_shift (&res_queue);
774
775	if (req)
776	{
777	--npending;
778
779	if (!res_queue.size)
780	{
781	/* read any signals sent by the worker threads */
782	char buf [4];
783	while (read (respipe [0], buf, 4) == 4)
784	;
785	}
786	}
787
788	UNLOCK (reslock);
789
790	if (!req)
791	break;
792
793	--nreqs;
794
795	if (req->type == REQ_GROUP && req->size)
796	{
797	req->int1 = 1; /* mark request as delayed */
798	continue;
799	}
800	else
801	{
802	if (!req_invoke (req))
803	{
804	req_free (req);
805	unblock_sig ();
806	croak (0);	452	croak (0);
807	}
808		453
809	count++;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
810	}	455	return res;
811
812	req_free (req);
813
814	if (maxreqs && !--maxreqs)
815	break;
816
817	if (max_poll_time)
818	{
819	gettimeofday (&tv_now, 0);
820
821	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
822	break;
823	}
824	}
825
826	if (nreqs <= max_outstanding)
827	break;
828		456
829	poll_wait ();	457	poll_wait ();
830
831	++maxreqs;
832	}	458	}
833
834	unblock_sig ();
835	return count;
836	}	459	}
837		460
838	static void create_pipe ()	461	static void atfork_child (void)
839	{	462	{
840	if (pipe (respipe))	463	create_respipe ();
841	croak ("unable to initialize result pipe");
842
843	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
844	croak ("cannot set result pipe to nonblocking mode");
845
846	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
847	croak ("cannot set result pipe to nonblocking mode");
848	}	464	}
849		465
850	/*****************************************************************************/	466	static SV *
851	/* work around various missing functions */	467	get_cb (SV *cb_sv)
852
853	#if !HAVE_PREADWRITE
854	# define pread aio_pread
855	# define pwrite aio_pwrite
856
857	/*
858	* make our pread/pwrite safe against themselves, but not against
859	* normal read/write by using a mutex. slows down execution a lot,
860	* but that's your problem, not mine.
861	*/
862	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
863
864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
865	{	468	{
866	ssize_t res;	469	HV *st;
867	off_t ooffset;	470	GV *gvp;
		471	CV *cv;
868		472
869	LOCK (preadwritelock);	473	if (!SvOK (cb_sv))
870	ooffset = lseek (fd, 0, SEEK_CUR);
871	lseek (fd, offset, SEEK_SET);
872	res = read (fd, buf, count);
873	lseek (fd, ooffset, SEEK_SET);
874	UNLOCK (preadwritelock);
875
876	return res;
877	}
878
879	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
880	{
881	ssize_t res;
882	off_t ooffset;
883
884	LOCK (preadwritelock);
885	ooffset = lseek (fd, 0, SEEK_CUR);
886	lseek (fd, offset, SEEK_SET);
887	res = write (fd, buf, count);
888	lseek (fd, offset, SEEK_SET);
889	UNLOCK (preadwritelock);
890
891	return res;
892	}
893	#endif
894
895	#if !HAVE_FDATASYNC
896	# define fdatasync fsync
897	#endif
898
899	#if !HAVE_READAHEAD
900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
901
902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
903	{
904	dBUF;
905
906	while (count > 0)
907	{
908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
909
910	pread (fd, aio_buf, len, offset);
911	offset += len;
912	count -= len;
913	}
914
915	errno = 0;
916	}
917
918	#endif
919
920	#if !HAVE_READDIR_R
921	# define readdir_r aio_readdir_r
922
923	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
924
925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
926	{
927	struct dirent *e;
928	int errorno;
929
930	LOCK (readdirlock);
931
932	e = readdir (dirp);
933	errorno = errno;
934
935	if (e)
936	{
937	*res = ent;
938	strcpy (ent->d_name, e->d_name);
939	}
940	else
941	*res = 0;
942
943	UNLOCK (readdirlock);
944
945	errno = errorno;
946	return e ? 0 : -1;
947	}
948	#endif
949
950	/* sendfile always needs emulation */
951	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
952	{
953	ssize_t res;
954
955	if (!count)
956	return 0;	474	return 0;
957		475
958	#if HAVE_SENDFILE	476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
959	# if __linux
960	res = sendfile (ofd, ifd, &offset, count);
961		477
962	# elif __freebsd	478	if (!cv)
963	/*	479	croak ("IO::AIO watcher callback must be undef or a CODE reference");
964	* Of course, the freebsd sendfile is a dire hack with no thoughts
965	* wasted on making it similar to other I/O functions.
966	*/
967	{
968	off_t sbytes;
969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
970		480
971	if (res < 0 && sbytes)	481	return (SV *)cv;
972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
973	res = sbytes;
974	}
975
976	# elif __hpux
977	res = sendfile (ofd, ifd, offset, count, 0, 0);
978
979	# elif __solaris
980	{
981	struct sendfilevec vec;
982	size_t sbytes;
983
984	vec.sfv_fd = ifd;
985	vec.sfv_flag = 0;
986	vec.sfv_off = offset;
987	vec.sfv_len = count;
988
989	res = sendfilev (ofd, &vec, 1, &sbytes);
990
991	if (res < 0 && sbytes)
992	res = sbytes;
993	}
994
995	# endif
996	#else
997	res = -1;
998	errno = ENOSYS;
999	#endif
1000
1001	if (res < 0
1002	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1003	#if __solaris
1004	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
1005	#endif
1006	)
1007	)
1008	{
1009	/* emulate sendfile. this is a major pain in the ass */
1010	dBUF;
1011
1012	res = 0;
1013
1014	while (count)
1015	{
1016	ssize_t cnt;
1017
1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
1019
1020	if (cnt <= 0)
1021	{
1022	if (cnt && !res) res = -1;
1023	break;
1024	}
1025
1026	cnt = write (ofd, aio_buf, cnt);
1027
1028	if (cnt <= 0)
1029	{
1030	if (cnt && !res) res = -1;
1031	break;
1032	}
1033
1034	offset += cnt;
1035	res += cnt;
1036	count -= cnt;
1037	}
1038	}
1039
1040	return res;
1041	}
1042
1043	/* read a full directory */
1044	static void scandir_ (aio_req req, worker *self)
1045	{
1046	DIR *dirp;
1047	union
1048	{
1049	struct dirent d;
1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
1051	} *u;
1052	struct dirent *entp;
1053	char *name, *names;
1054	int memlen = 4096;
1055	int memofs = 0;
1056	int res = 0;
1057	int errorno;
1058
1059	LOCK (wrklock);
1060	self->dirp = dirp = opendir (req->ptr1);
1061	self->dbuf = u = malloc (sizeof (*u));
1062	req->flags |= FLAG_PTR2_FREE;
1063	req->ptr2 = names = malloc (memlen);
1064	UNLOCK (wrklock);
1065
1066	if (dirp && u && names)
1067	for (;;)
1068	{
1069	errno = 0;
1070	readdir_r (dirp, &u->d, &entp);
1071
1072	if (!entp)
1073	break;
1074
1075	name = entp->d_name;
1076
1077	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1078	{
1079	int len = strlen (name) + 1;
1080
1081	res++;
1082
1083	while (memofs + len > memlen)
1084	{
1085	memlen *= 2;
1086	LOCK (wrklock);
1087	req->ptr2 = names = realloc (names, memlen);
1088	UNLOCK (wrklock);
1089
1090	if (!names)
1091	break;
1092	}
1093
1094	memcpy (names + memofs, name, len);
1095	memofs += len;
1096	}
1097	}
1098
1099	if (errno)
1100	res = -1;
1101
1102	req->result = res;
1103	}
1104
1105	/*****************************************************************************/
1106
1107	static void *aio_proc (void *thr_arg)
1108	{
1109	aio_req req;
1110	struct timespec ts;
1111	worker *self = (worker *)thr_arg;
1112
1113	/* try to distribute timeouts somewhat evenly */
1114	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1115	* (1000000000UL / 1024UL);
1116
1117	for (;;)
1118	{
1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1120
1121	LOCK (reqlock);
1122
1123	for (;;)
1124	{
1125	self->req = req = reqq_shift (&req_queue);
1126
1127	if (req)
1128	break;
1129
1130	++idle;
1131
1132	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1133	== ETIMEDOUT)
1134	{
1135	if (idle > max_idle)
1136	{
1137	--idle;
1138	UNLOCK (reqlock);
1139	LOCK (wrklock);
1140	--started;
1141	UNLOCK (wrklock);
1142	goto quit;
1143	}
1144
1145	/* we are allowed to idle, so do so without any timeout */
1146	pthread_cond_wait (&reqwait, &reqlock);
1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1148	}
1149
1150	--idle;
1151	}
1152
1153	--nready;
1154
1155	UNLOCK (reqlock);
1156
1157	errno = 0; /* strictly unnecessary */
1158
1159	if (!(req->flags & FLAG_CANCELLED))
1160	switch (req->type)
1161	{
1162	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1164
1165	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1167
1168	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1169	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1171
1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1173	case REQ_CLOSE: req->result = close (req->int1); break;
1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1176	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1177	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1178	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1179	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1180	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1181
1182	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1183	case REQ_FSYNC: req->result = fsync (req->int1); break;
1184	case REQ_READDIR: scandir_ (req, self); break;
1185
1186	case REQ_BUSY:
1187	{
1188	struct timeval tv;
1189
1190	tv.tv_sec = req->int1;
1191	tv.tv_usec = req->int2;
1192
1193	req->result = select (0, 0, 0, 0, &tv);
1194	}
1195
1196	case REQ_GROUP:
1197	case REQ_NOP:
1198	break;
1199
1200	case REQ_QUIT:
1201	goto quit;
1202
1203	default:
1204	req->result = ENOSYS;
1205	break;
1206	}
1207
1208	req->errorno = errno;
1209
1210	LOCK (reslock);
1211
1212	++npending;
1213
1214	if (!reqq_push (&res_queue, req))
1215	{
1216	/* write a dummy byte to the pipe so fh becomes ready */
1217	write (respipe [1], &respipe, 1);
1218
1219	/* optionally signal the main thread asynchronously */
1220	if (main_sig)
1221	pthread_kill (main_tid, main_sig);
1222	}
1223
1224	self->req = 0;
1225	worker_clear (self);
1226
1227	UNLOCK (reslock);
1228	}
1229
1230	quit:
1231	LOCK (wrklock);
1232	worker_free (self);
1233	UNLOCK (wrklock);
1234
1235	return 0;
1236	}
1237
1238	/*****************************************************************************/
1239
1240	static void atfork_prepare (void)
1241	{
1242	LOCK (wrklock);
1243	LOCK (reqlock);
1244	LOCK (reslock);
1245	#if !HAVE_PREADWRITE
1246	LOCK (preadwritelock);
1247	#endif
1248	#if !HAVE_READDIR_R
1249	LOCK (readdirlock);
1250	#endif
1251	}
1252
1253	static void atfork_parent (void)
1254	{
1255	#if !HAVE_READDIR_R
1256	UNLOCK (readdirlock);
1257	#endif
1258	#if !HAVE_PREADWRITE
1259	UNLOCK (preadwritelock);
1260	#endif
1261	UNLOCK (reslock);
1262	UNLOCK (reqlock);
1263	UNLOCK (wrklock);
1264	}
1265
1266	static void atfork_child (void)
1267	{
1268	aio_req prv;
1269
1270	while (prv = reqq_shift (&req_queue))
1271	req_free (prv);
1272
1273	while (prv = reqq_shift (&res_queue))
1274	req_free (prv);
1275
1276	while (wrk_first.next != &wrk_first)
1277	{
1278	worker *wrk = wrk_first.next;
1279
1280	if (wrk->req)
1281	req_free (wrk->req);
1282
1283	worker_clear (wrk);
1284	worker_free (wrk);
1285	}
1286
1287	started = 0;
1288	idle = 0;
1289	nreqs = 0;
1290	nready = 0;
1291	npending = 0;
1292
1293	close (respipe [0]);
1294	close (respipe [1]);
1295	create_pipe ();
1296
1297	atfork_parent ();
1298	}	482	}
1299		483
1300	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
1301	aio_req req; \	486	aio_req req; \
1302	int req_pri = next_pri; \	487	int req_pri = next_pri; \
1303	next_pri = DEFAULT_PRI + PRI_BIAS; \	488	next_pri = EIO_PRI_DEFAULT; \
1304	\	489	\
1305	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
1306	croak ("callback must be undef or of reference type"); \
1307	\	491	\
1308	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
1309	if (!req) \	493	if (!req) \
1310	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
1311	\	495	\
1312	req->callback = newSVsv (callback); \	496	req->callback = SvREFCNT_inc (cb_cv); \
1313	req->pri = req_pri	497	req->pri = req_pri
1314		498
1315	#define REQ_SEND \	499	#define REQ_SEND \
		500	PUTBACK; \
1316	req_send (req); \	501	req_submit (req); \
		502	SPAGAIN; \
1317	\	503	\
1318	if (GIMME_V != G_VOID) \	504	if (GIMME_V != G_VOID) \
1319	XPUSHs (req_sv (req, AIO_REQ_KLASS));	505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1320		506
1321	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
1322		508
1323	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
1324		510
1325	BOOT:	511	BOOT:
1326	{	512	{
1327	HV *stash = gv_stashpv ("IO::AIO", 1);	513	stash = gv_stashpv ("IO::AIO", 1);
1328		514
1329	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1330	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1331	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1332	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1333	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
1334	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1335	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));	522	#endif
1336		523
1337	create_pipe ();	524	create_respipe ();
1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	525
		526	if (eio_init (want_poll, done_poll) < 0)
		527	croak ("IO::AIO: unable to initialise eio library");
		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
1339	}	531	}
1340		532
1341	void	533	void
1342	max_poll_reqs (int nreqs)	534	max_poll_reqs (int nreqs)
1343	PROTOTYPE: $	535	PROTOTYPE: $
1344	CODE:	536	CODE:
1345	max_poll_reqs = nreqs;	537	eio_set_max_poll_reqs (nreqs);
1346		538
1347	void	539	void
1348	max_poll_time (double nseconds)	540	max_poll_time (double nseconds)
1349	PROTOTYPE: $	541	PROTOTYPE: $
1350	CODE:	542	CODE:
1351	max_poll_time = nseconds * AIO_TICKS;	543	eio_set_max_poll_time (nseconds);
1352		544
1353	void	545	void
1354	min_parallel (int nthreads)	546	min_parallel (int nthreads)
1355	PROTOTYPE: $	547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
1356		550
1357	void	551	void
1358	max_parallel (int nthreads)	552	max_parallel (int nthreads)
1359	PROTOTYPE: $	553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
1360		556
1361	void	557	void
1362	max_idle (int nthreads)	558	max_idle (int nthreads)
1363	PROTOTYPE: $	559	PROTOTYPE: $
1364	CODE:	560	CODE:
1365	set_max_idle (nthreads);	561	eio_set_max_idle (nthreads);
1366		562
1367	int	563	void
1368	max_outstanding (int maxreqs)	564	max_outstanding (int maxreqs)
1369	PROTOTYPE: $	565	PROTOTYPE: $
1370	CODE:	566	CODE:
1371	RETVAL = max_outstanding;
1372	max_outstanding = maxreqs;	567	max_outstanding = maxreqs;
1373	OUTPUT:
1374	RETVAL
1375		568
1376	void	569	void
1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1378	SV8 * pathname
1379	int flags
1380	int mode
1381	SV * callback
1382	PROTOTYPE: $$$;$	571	PROTOTYPE: $$$;$
1383	PPCODE:	572	PPCODE:
1384	{	573	{
1385	dREQ;	574	dREQ;
1386		575
1387	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
1388	req->sv1 = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
1389	req->ptr1 = SvPVbyte_nolen (req->sv1);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
1390	req->int1 = flags;	579	req->int1 = flags;
1391	req->mode = mode;	580	req->int2 = mode;
1392		581
1393	REQ_SEND;	582	REQ_SEND;
1394	}	583	}
1395		584
1396	void	585	void
1397	aio_close (fh,callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1398	SV * fh
1399	SV * callback
1400	PROTOTYPE: $;$	587	PROTOTYPE: $;$
1401	ALIAS:	588	ALIAS:
1402	aio_close = REQ_CLOSE
1403	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
1404	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
1405	PPCODE:	591	PPCODE:
1406	{	592	{
1407	dREQ;	593	dREQ;
1408		594
1409	req->type = ix;	595	req->type = ix;
1410	req->fh = newSVsv (fh);	596	req->sv1 = newSVsv (fh);
1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1412		598
1413	REQ_SEND (req);	599	REQ_SEND (req);
1414	}	600	}
1415		601
1416	void	602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1418	SV * fh
1419	UV offset
1420	UV length
1421	SV8 * data
1422	UV dataoffset
1423	SV * callback
1424	ALIAS:	632	ALIAS:
1425	aio_read = REQ_READ	633	aio_read = EIO_READ
1426	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
1427	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
1428	PPCODE:	636	PPCODE:
1429	{	637	{
1430	STRLEN svlen;	638	STRLEN svlen;
1431	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
1432		641
1433	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
1434	SvPOK_on (data);	643	SvPOK_on (data);
1435		644
1436	if (dataoffset < 0)	645	if (dataoffset < 0)
1437	dataoffset += svlen;	646	dataoffset += svlen;
1438		647
1439	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
1440	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
1441		650
1442	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
1443	{	652	{
1444	/* write: check length and adjust. */	653	/* write: check length and adjust. */
1445	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
1446	length = svlen - dataoffset;	655	len = svlen - dataoffset;
1447	}	656	}
1448	else	657	else
1449	{	658	{
1450	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
1451	svptr = SvGROW (data, length + dataoffset + 1);	660	svptr = SvGROW (data, len + dataoffset + 1);
1452	}	661	}
1453		662
1454	if (length < 0)	663	if (len < 0)
1455	croak ("length must not be negative");	664	croak ("length must not be negative");
1456		665
1457	{	666	{
1458	dREQ;	667	dREQ;
1459		668
1460	req->type = ix;	669	req->type = ix;
1461	req->fh = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1463	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
1464	req->offs = offset;	673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1465	req->size = length;	674	req->size = len;
1466	req->sv1 = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc (data);
1467	req->ptr1 = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
1468	req->stroffset = dataoffset;	677	req->stroffset = dataoffset;
1469		678
1470	if (!SvREADONLY (data))	679	if (!SvREADONLY (data))
1471	{	680	{
1472	SvREADONLY_on (data);	681	SvREADONLY_on (data);
1473	req->flags |= FLAG_SV1_RO_OFF;	682	req->flags |= FLAG_SV2_RO_OFF;
1474	}	683	}
1475		684
1476	REQ_SEND;	685	REQ_SEND;
1477	}	686	}
1478	}	687	}
1479		688
1480	void	689	void
1481	aio_readlink (path,callback=&PL_sv_undef)	690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1482	SV8 * path
1483	SV * callback
1484	PROTOTYPE: $$;$	691	PROTOTYPE: $$;$
1485	PPCODE:	692	PPCODE:
1486	{	693	{
1487	SV *data;	694	SV *data;
1488	dREQ;	695	dREQ;
1489		696
1490	data = newSV (NAME_MAX);
1491	SvPOK_on (data);
1492
1493	req->type = REQ_READLINK;	697	req->type = EIO_READLINK;
1494	req->fh = newSVsv (path);	698	req->sv1 = newSVsv (path);
1495	req->ptr2 = SvPVbyte_nolen (req->fh);	699	req->ptr1 = SvPVbyte_nolen (req->sv1);
1496	req->sv1 = data;
1497	req->ptr1 = SvPVbyte_nolen (data);
1498		700
1499	REQ_SEND;	701	REQ_SEND;
1500	}	702	}
1501		703
1502	void	704	void
1503	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	705	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1504	SV * out_fh
1505	SV * in_fh
1506	UV in_offset
1507	UV length
1508	SV * callback
1509	PROTOTYPE: $$$$;$	706	PROTOTYPE: $$$$;$
1510	PPCODE:	707	PPCODE:
1511	{	708	{
1512	dREQ;	709	dREQ;
1513		710
1514	req->type = REQ_SENDFILE;	711	req->type = EIO_SENDFILE;
1515	req->fh = newSVsv (out_fh);	712	req->sv1 = newSVsv (out_fh);
1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1517	req->sv2 = newSVsv (in_fh);	714	req->sv2 = newSVsv (in_fh);
1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1519	req->offs = in_offset;	716	req->offs = SvVAL64 (in_offset);
1520	req->size = length;	717	req->size = length;
1521		718
1522	REQ_SEND;	719	REQ_SEND;
1523	}	720	}
1524		721
1525	void	722	void
1526	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1527	SV * fh
1528	UV offset
1529	IV length
1530	SV * callback
1531	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
1532	PPCODE:	725	PPCODE:
1533	{	726	{
1534	dREQ;	727	dREQ;
1535		728
1536	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
1537	req->fh = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1539	req->offs = offset;	732	req->offs = SvVAL64 (offset);
1540	req->size = length;	733	req->size = length;
1541		734
1542	REQ_SEND;	735	REQ_SEND;
1543	}	736	}
1544		737
1545	void	738	void
1546	aio_stat (fh_or_path,callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1547	SV8 * fh_or_path
1548	SV * callback
1549	ALIAS:	740	ALIAS:
1550	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
1551	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
1552	PPCODE:	743	PPCODE:
1553	{	744	{
1554	dREQ;	745	dREQ;
1555		746
1556	req->ptr2 = malloc (sizeof (Stat_t));	747	req->sv1 = newSVsv (fh_or_path);
1557	if (!req->ptr2)
1558	{
1559	req_free (req);
1560	croak ("out of memory during aio_stat statdata allocation");
1561	}
1562		748
1563	req->flags |= FLAG_PTR2_FREE;	749	if (SvPOK (req->sv1))
1564
1565	if (SvPOK (fh_or_path))
1566	{	750	{
1567	req->type = ix;	751	req->type = ix;
1568	req->sv1 = newSVsv (fh_or_path);
1569	req->ptr1 = SvPVbyte_nolen (req->sv1);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
1570	}	753	}
1571	else	754	else
1572	{	755	{
1573	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
1574	req->fh = newSVsv (fh_or_path);
1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1576	}	758	}
1577		759
1578	REQ_SEND;	760	REQ_SEND;
1579	}	761	}
1580		762
1581	void	763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
		774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
		783
		784	REQ_SEND;
		785	}
		786
		787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
1582	aio_unlink (pathname,callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1583	SV8 * pathname
1584	SV * callback
1585	ALIAS:	862	ALIAS:
1586	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
1587	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
1588	aio_readdir = REQ_READDIR	865	aio_readdir = EIO_READDIR
1589	PPCODE:	866	PPCODE:
1590	{	867	{
1591	dREQ;	868	dREQ;
1592		869
1593	req->type = ix;	870	req->type = ix;
…		…
1596		873
1597	REQ_SEND;	874	REQ_SEND;
1598	}	875	}
1599		876
1600	void	877	void
1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)	878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1602	SV8 * oldpath
1603	SV8 * newpath
1604	SV * callback
1605	ALIAS:	879	ALIAS:
1606	aio_link = REQ_LINK	880	aio_link = EIO_LINK
1607	aio_symlink = REQ_SYMLINK	881	aio_symlink = EIO_SYMLINK
1608	aio_rename = REQ_RENAME	882	aio_rename = EIO_RENAME
1609	PPCODE:	883	PPCODE:
1610	{	884	{
1611	dREQ;	885	dREQ;
1612		886
1613	req->type = ix;	887	req->type = ix;
1614	req->fh = newSVsv (oldpath);	888	req->sv1 = newSVsv (oldpath);
1615	req->ptr2 = SvPVbyte_nolen (req->fh);
1616	req->sv1 = newSVsv (newpath);
1617	req->ptr1 = SvPVbyte_nolen (req->sv1);	889	req->ptr1 = SvPVbyte_nolen (req->sv1);
		890	req->sv2 = newSVsv (newpath);
		891	req->ptr2 = SvPVbyte_nolen (req->sv2);
1618		892
1619	REQ_SEND;	893	REQ_SEND;
1620	}	894	}
1621		895
1622	void	896	void
1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1624	SV8 * pathname
1625	SV * callback
1626	UV mode
1627	UV dev
1628	PPCODE:	898	PPCODE:
1629	{	899	{
1630	dREQ;	900	dREQ;
1631		901
1632	req->type = REQ_MKNOD;	902	req->type = EIO_MKNOD;
1633	req->sv1 = newSVsv (pathname);	903	req->sv1 = newSVsv (pathname);
1634	req->ptr1 = SvPVbyte_nolen (req->sv1);	904	req->ptr1 = SvPVbyte_nolen (req->sv1);
1635	req->mode = (mode_t)mode;	905	req->int2 = (mode_t)mode;
1636	req->offs = dev;	906	req->offs = dev;
1637		907
1638	REQ_SEND;	908	REQ_SEND;
1639	}	909	}
1640		910
1641	void	911	void
1642	aio_busy (delay,callback=&PL_sv_undef)	912	aio_busy (double delay, SV *callback=&PL_sv_undef)
1643	double delay
1644	SV * callback
1645	PPCODE:	913	PPCODE:
1646	{	914	{
1647	dREQ;	915	dREQ;
1648		916
1649	req->type = REQ_BUSY;	917	req->type = EIO_BUSY;
1650	req->int1 = delay < 0. ? 0 : delay;	918	req->nv1 = delay < 0. ? 0. : delay;
1651	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1652		919
1653	REQ_SEND;	920	REQ_SEND;
1654	}	921	}
1655		922
1656	void	923	void
1657	aio_group (callback=&PL_sv_undef)	924	aio_group (SV *callback=&PL_sv_undef)
1658	SV * callback
1659	PROTOTYPE: ;$	925	PROTOTYPE: ;$
1660	PPCODE:	926	PPCODE:
1661	{	927	{
1662	dREQ;	928	dREQ;
1663		929
1664	req->type = REQ_GROUP;	930	req->type = EIO_GROUP;
1665		931
1666	req_send (req);	932	req_submit (req);
1667	XPUSHs (req_sv (req, AIO_GRP_KLASS));	933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1668	}	934	}
1669		935
1670	void	936	void
1671	aio_nop (callback=&PL_sv_undef)	937	aio_nop (SV *callback=&PL_sv_undef)
1672	SV * callback	938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
1673	PPCODE:	941	PPCODE:
1674	{	942	{
1675	dREQ;	943	dREQ;
1676		944
1677	req->type = REQ_NOP;	945	req->type = ix;
1678		946
1679	REQ_SEND;	947	REQ_SEND;
1680	}	948	}
1681		949
1682	int	950	int
1683	aioreq_pri (int pri = 0)	951	aioreq_pri (int pri = 0)
1684	PROTOTYPE: ;$	952	PROTOTYPE: ;$
1685	CODE:	953	CODE:
1686	RETVAL = next_pri - PRI_BIAS;	954	RETVAL = next_pri;
1687	if (items > 0)	955	if (items > 0)
1688	{	956	{
1689	if (pri < PRI_MIN) pri = PRI_MIN;	957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1690	if (pri > PRI_MAX) pri = PRI_MAX;	958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1691	next_pri = pri + PRI_BIAS;	959	next_pri = pri;
1692	}	960	}
1693	OUTPUT:	961	OUTPUT:
1694	RETVAL	962	RETVAL
1695		963
1696	void	964	void
1697	aioreq_nice (int nice = 0)	965	aioreq_nice (int nice = 0)
1698	CODE:	966	CODE:
1699	nice = next_pri - nice;	967	nice = next_pri - nice;
1700	if (nice < PRI_MIN) nice = PRI_MIN;	968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1701	if (nice > PRI_MAX) nice = PRI_MAX;	969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1702	next_pri = nice + PRI_BIAS;	970	next_pri = nice;
1703		971
1704	void	972	void
1705	flush ()	973	flush ()
1706	PROTOTYPE:	974	PROTOTYPE:
1707	CODE:	975	CODE:
1708	while (nreqs)	976	while (eio_nreqs ())
1709	{	977	{
1710	poll_wait ();	978	poll_wait ();
1711	poll_cb ();	979	poll_cb ();
1712	}	980	}
1713		981
…		…
1740	poll_wait()	1008	poll_wait()
1741	PROTOTYPE:	1009	PROTOTYPE:
1742	CODE:	1010	CODE:
1743	poll_wait ();	1011	poll_wait ();
1744		1012
1745	void
1746	setsig (int signum = SIGIO)
1747	PROTOTYPE: ;$
1748	CODE:
1749	{
1750	if (block_sig_level)
1751	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1752
1753	LOCK (reslock);
1754	main_tid = pthread_self ();
1755	main_sig = signum;
1756	UNLOCK (reslock);
1757
1758	if (main_sig && npending)
1759	pthread_kill (main_tid, main_sig);
1760	}
1761
1762	void
1763	aio_block (SV *cb)
1764	PROTOTYPE: &
1765	PPCODE:
1766	{
1767	int count;
1768
1769	block_sig ();
1770	PUSHMARK (SP);
1771	PUTBACK;
1772	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1773	SPAGAIN;
1774	unblock_sig ();
1775
1776	if (SvTRUE (ERRSV))
1777	croak (0);
1778
1779	XSRETURN (count);
1780	}
1781
1782	int	1013	int
1783	nreqs()	1014	nreqs()
1784	PROTOTYPE:	1015	PROTOTYPE:
1785	CODE:	1016	CODE:
1786	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
1787	OUTPUT:	1018	OUTPUT:
1788	RETVAL	1019	RETVAL
1789		1020
1790	int	1021	int
1791	nready()	1022	nready()
1792	PROTOTYPE:	1023	PROTOTYPE:
1793	CODE:	1024	CODE:
1794	RETVAL = get_nready ();	1025	RETVAL = eio_nready ();
1795	OUTPUT:	1026	OUTPUT:
1796	RETVAL	1027	RETVAL
1797		1028
1798	int	1029	int
1799	npending()	1030	npending()
1800	PROTOTYPE:	1031	PROTOTYPE:
1801	CODE:	1032	CODE:
1802	RETVAL = get_npending ();	1033	RETVAL = eio_npending ();
1803	OUTPUT:	1034	OUTPUT:
1804	RETVAL	1035	RETVAL
1805		1036
1806	int	1037	int
1807	nthreads()	1038	nthreads()
1808	PROTOTYPE:	1039	PROTOTYPE:
1809	CODE:	1040	CODE:
1810	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1041	RETVAL = eio_nthreads ();
1811	RETVAL = started;
1812	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1813	OUTPUT:	1042	OUTPUT:
1814	RETVAL	1043	RETVAL
1815		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
1816	PROTOTYPES: DISABLE	1050	PROTOTYPES: DISABLE
1817		1051
1818	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1819		1053
1820	void	1054	void
1821	cancel (aio_req_ornot req)	1055	cancel (aio_req_ornot req)
1822	CODE:	1056	CODE:
1823	req_cancel (req);	1057	eio_cancel (req);
1824		1058
1825	void	1059	void
1826	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1827	CODE:	1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
1828	SvREFCNT_dec (req->callback);	1070	SvREFCNT_dec (req->callback);
1829	req->callback = newSVsv (callback);	1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
1830		1074
1831	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1832		1076
1833	void	1077	void
1834	add (aio_req grp, ...)	1078	add (aio_req grp, ...)
1835	PPCODE:	1079	PPCODE:
1836	{	1080	{
1837	int i;	1081	int i;
1838	aio_req req;
1839
1840	if (main_sig && !block_sig_level)
1841	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1842		1082
1843	if (grp->int1 == 2)	1083	if (grp->int1 == 2)
1844	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1845		1085
1846	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1847	{	1087	{
		1088	aio_req req;
		1089
1848	if (GIMME_V != G_VOID)	1090	if (GIMME_V != G_VOID)
1849	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1850		1092
1851	req = SvAIO_REQ (ST (i));	1093	req = SvAIO_REQ (ST (i));
1852		1094
1853	if (req)	1095	if (req)
1854	{	1096	eio_grp_add (grp, req);
1855	++grp->size;
1856	req->grp = grp;
1857
1858	req->grp_prev = 0;
1859	req->grp_next = grp->grp_first;
1860
1861	if (grp->grp_first)
1862	grp->grp_first->grp_prev = req;
1863
1864	grp->grp_first = req;
1865	}
1866	}	1097	}
1867	}	1098	}
1868		1099
1869	void	1100	void
1870	cancel_subs (aio_req_ornot req)	1101	cancel_subs (aio_req_ornot req)
…		…
1895	grp->errorno = errorno;	1126	grp->errorno = errorno;
1896		1127
1897	void	1128	void
1898	limit (aio_req grp, int limit)	1129	limit (aio_req grp, int limit)
1899	CODE:	1130	CODE:
1900	grp->int2 = limit;	1131	eio_grp_limit (grp, limit);
1901	aio_grp_feed (grp);
1902		1132
1903	void	1133	void
1904	feed (aio_req grp, SV *callback=&PL_sv_undef)	1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
1905	CODE:	1135	CODE:
1906	{	1136	{
…		…
1908	grp->sv2 = newSVsv (callback);	1138	grp->sv2 = newSVsv (callback);
1909		1139
1910	if (grp->int2 <= 0)	1140	if (grp->int2 <= 0)
1911	grp->int2 = 2;	1141	grp->int2 = 2;
1912		1142
1913	aio_grp_feed (grp);	1143	eio_grp_limit (grp, grp->int2);
1914	}	1144	}
1915		1145

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