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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.86 by root, Mon Oct 30 23:30:00 2006 UTC vs.
Revision 1.139 by root, Tue Apr 21 20:12:56 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"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
22	#include <errno.h>	11	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	12	#include <sys/types.h>
26	#include <sys/stat.h>	13	#include <sys/stat.h>
27	#include <limits.h>	14	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	15	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	16	#include <sched.h>
32		17
33	#if HAVE_SENDFILE	18	/* perl namespace pollution */
34	# if __linux	19	#undef VERSION
35	# include <sys/sendfile.h>	20
36	# elif __freebsd	21	#ifdef _WIN32
37	# include <sys/socket.h>	22
38	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	24	# undef malloc
40	# include <sys/socket.h>	25	# undef free
41	# elif __solaris /* not yet */	26
42	# 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
43	# else	59	#else
44	# error sendfile support requested but not available	60
45	# 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
46	#endif	68	#endif
47		69
48	/* number of seconds after which idle threads exit */	70	/* perl stupidly overrides readdir and maybe others */
49	#define IDLE_TIMEOUT 10	71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
50		75
51	/* used for struct dirent, AIX doesn't provide it */	76	#define EIO_STRUCT_STAT Stat_t
52	#ifndef NAME_MAX	77
53	# 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
54	#endif	83	#endif
55		84
56	#ifndef PTHREAD_STACK_MIN	85	/*****************************************************************************/
57	/* care for broken platforms, e.g. windows */	86
58	# 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)
59	#endif	91	#endif
60		92
61	#if __ia64	93	#define expect_false(expr) expect ((expr) != 0, 0)
62	# define STACKSIZE 65536	94	#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		95
69	/* wether word reads are potentially non-atomic.	96	/*****************************************************************************/
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		97
81	/* buffer size for various temporary buffers */	98	static HV *stash;
82	#define AIO_BUFSIZE 65536	99	typedef SV SV8; /* byte-sv, used for argument-checking */
83
84	#define dBUF \
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		100
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		103
109	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
110	{
111	struct aio_cb *volatile next;
112
113	SV *callback, *fh;	105	SV *callback; \
114	SV *sv1, *sv2;	106	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;	107	STRLEN stroffset; \
122	int type;	108	SV *self;
123	int int1, int2;
124	int errorno;
125	mode_t mode; /* open */
126		109
127	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
128	unsigned char pri;
129		111
130	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
132	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
133		118
134	enum {	119	enum {
135	FLAG_CANCELLED = 0x01,
136	FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
137	};	121	};
138		122
		123	#include "libeio/eio.c"
		124
139	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
140	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
141		127
142	enum {	128	static SV *on_next_submit;
143	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
144	PRI_MAX = 4,	130	static int max_outstanding;
145		131
146	DEFAULT_PRI = 0,	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
147	PRI_BIAS = -PRI_MIN,
148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
149	};
150		133
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);	134	static void req_destroy (aio_req req);
325	static void req_cancel (aio_req req);	135	static void req_cancel (aio_req req);
		136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
326		150
327	/* must be called at most once */	151	/* must be called at most once */
328	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
329	{	153	{
330	if (!req->self)	154	if (!req->self)
…		…
348	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
349	}	173	}
350		174
351	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
352	{	176	{
353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
354	{	178	{
355	int old_len = grp->size;
356
357	if (grp->sv2 && SvOK (grp->sv2))
358	{
359	dSP;	179	dSP;
360		180
361	ENTER;	181	ENTER;
362	SAVETMPS;	182	SAVETMPS;
363	PUSHMARK (SP);	183	PUSHMARK (SP);
364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
365	PUTBACK;	185	PUTBACK;
366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
367	SPAGAIN;	187	SPAGAIN;
368	FREETMPS;	188	FREETMPS;
369	LEAVE;	189	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	}	190	}
380	}	191	}
381		192
382	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
383	{	194	{
384	--grp->size;	195	eio_submit (req);
385		196
386	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
387	aio_grp_feed (grp);
388
389	/* finish, if done */
390	if (!grp->size && grp->int1)
391	{	198	{
392	req_invoke (grp);	199	dSP;
393	req_free (grp);	200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
394	}	207	}
395	}	208	}
396		209
397	static void req_invoke (aio_req req)	210	static int req_invoke (eio_req *req)
398	{	211	{
399	dSP;	212	dSP;
400		213
401	if (req->flags & FLAG_DATA_RO_OFF)	214	if (req->flags & FLAG_SV2_RO_OFF)
402	SvREADONLY_off (req->sv1);	215	SvREADONLY_off (req->sv2);
403		216
404	if (req->statdata)	217	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	{	218	{
413	ENTER;	219	ENTER;
414	SAVETMPS;	220	SAVETMPS;
415	PUSHMARK (SP);	221	PUSHMARK (SP);
416	EXTEND (SP, 1);	222	EXTEND (SP, 1);
417		223
418	switch (req->type)	224	switch (req->type)
419	{	225	{
420	case REQ_READDIR:	226	case EIO_READDIR:
421	{	227	{
422	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
423		229
424	if (req->result >= 0)	230	if (req->result >= 0)
425	{	231	{
…		…
442		248
443	PUSHs (rv);	249	PUSHs (rv);
444	}	250	}
445	break;	251	break;
446		252
447	case REQ_OPEN:	253	case EIO_OPEN:
448	{	254	{
449	/* convert fd to fh */	255	/* convert fd to fh */
450	SV *fh;	256	SV *fh = &PL_sv_undef;
451		257
452	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
453	PUTBACK;	259	{
454	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
455	SPAGAIN;	261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
456		267
457	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
458		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
459	PUSHMARK (SP);	280	PUSHs (fh);
460	XPUSHs (sv_2mortal (fh));
461	}	281	}
462	break;	282	break;
463		283
464	case REQ_GROUP:	284	case EIO_GROUP:
465	req->int1 = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
466		286
467	if (req->sv1)	287	if (req->sv1)
468	{	288	{
469	int i;	289	int i;
…		…
473	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
474	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
475	}	295	}
476	break;	296	break;
477		297
478	case REQ_NOP:	298	case EIO_NOP:
479	case REQ_BUSY:	299	case EIO_BUSY:
480	break;	300	break;
481		301
482	case REQ_READLINK:	302	case EIO_READLINK:
483	if (req->result > 0)	303	if (req->result > 0)
484	{	304	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;	305	break;
490		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
491	case REQ_READ:	316	case EIO_READ:
		317	{
492	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
493	*SvEND (req->sv1) = 0;	319	*SvEND (req->sv2) = 0;
494	/* fall through */	320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
		330
495	default:	331	default:
496	PUSHs (sv_2mortal (newSViv (req->result)));	332	PUSHs (sv_2mortal (newSViv (req->result)));
497	break;	333	break;
498	}	334	}
499		335
500	errno = req->errorno;	336	errno = req->errorno;
501		337
502	PUTBACK;	338	PUTBACK;
503	call_sv (req->callback, G_VOID | G_EVAL);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
504	SPAGAIN;	340	SPAGAIN;
505		341
506	FREETMPS;	342	FREETMPS;
507	LEAVE;	343	LEAVE;
		344
		345	PUTBACK;
508	}	346	}
509		347
510	if (req->grp)	348	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	}	349	}
530		350
531	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
532	{	352	{
533	if (req->self)	353	if (req->self)
534	{	354	{
535	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
536	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
537	}	357	}
538		358
539	SvREFCNT_dec (req->fh);
540	SvREFCNT_dec (req->sv1);	359	SvREFCNT_dec (req->sv1);
541	SvREFCNT_dec (req->sv2);	360	SvREFCNT_dec (req->sv2);
542	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
543	Safefree (req->statdata);
544
545	if (req->type == REQ_READDIR)
546	free (req->ptr2);
547		362
548	Safefree (req);	363	Safefree (req);
549	}	364	}
550		365
551	static void req_cancel_subs (aio_req grp)	366	static void req_cancel_subs (aio_req grp)
552	{	367	{
553	aio_req sub;	368	aio_req sub;
554		369
555	if (grp->type != REQ_GROUP)	370	if (grp->type != EIO_GROUP)
556	return;	371	return;
557		372
558	SvREFCNT_dec (grp->sv2);	373	SvREFCNT_dec (grp->sv2);
559	grp->sv2 = 0;	374	grp->sv2 = 0;
560		375
561	for (sub = grp->grp_first; sub; sub = sub->grp_next)	376	eio_grp_cancel (grp);
562	req_cancel (sub);
563	}	377	}
564		378
565	static void req_cancel (aio_req req)	379	#ifdef USE_SOCKETS_AS_HANDLES
566	{	380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
567	req->flags |= FLAG_CANCELLED;	381	#else
568		382	# define TO_SOCKET(x) (x)
569	req_cancel_subs (req);
570	}
571
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	383	#endif
590		384
591	sigfillset (&fullsigset);	385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
592		389
593	LOCK (wrklock);	390	if (respipe [1] >= 0)
594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	391	respipe_close (TO_SOCKET (respipe [1]));
595		392
596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
597	{	401	{
598	wrk->prev = &wrk_first;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
599	wrk->next = wrk_first.next;	403	croak ("unable to initialize result pipe(2)");
600	wrk_first.next->prev = wrk;	404
601	wrk_first.next = wrk;	405	respipe_close (respipe [0]);
602	++started;	406	respipe [0] = old_readfd;
603	}	407	}
604	else
605	free (wrk);
606		408
607	sigprocmask (SIG_SETMASK, &oldsigset, 0);	409	#ifdef _WIN32
608	UNLOCK (wrklock);	410	int arg = 1;
609	}	411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
610		418
611	static void maybe_start_thread ()	419	respipe_osf [0] = TO_SOCKET (respipe [0]);
612	{	420	respipe_osf [1] = TO_SOCKET (respipe [1]);
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	}	421	}
622		422
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 ()	423	static void poll_wait (void)
678	{	424	{
679	fd_set rfd;	425	fd_set rfd;
680		426
681	while (nreqs)	427	while (eio_nreqs ())
682	{	428	{
683	int size;	429	int size;
684	if (WORDACCESS_UNSAFE) LOCK (reslock);	430
		431	X_LOCK (reslock);
685	size = res_queue.size;	432	size = res_queue.size;
686	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	433	X_UNLOCK (reslock);
687		434
688	if (size)	435	if (size)
689	return;	436	return;
690		437
691	maybe_start_thread ();	438	etp_maybe_start_thread ();
692		439
693	FD_ZERO(&rfd);	440	FD_ZERO (&rfd);
694	FD_SET(respipe [0], &rfd);	441	FD_SET (respipe [0], &rfd);
695		442
696	select (respipe [0] + 1, &rfd, 0, 0, 0);	443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
697	}	444	}
698	}	445	}
699		446
700	static int poll_cb ()	447	static int poll_cb (void)
701	{	448	{
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 (;;)	449	for (;;)
713	{	450	{
714	for (;;)	451	int res = eio_poll ();
715	{
716	maybe_start_thread ();
717		452
718	LOCK (reslock);	453	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;	454	croak (0);
		455
		456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
769		458
770	poll_wait ();	459	poll_wait ();
771
772	++maxreqs;
773	}	460	}
774
775	return count;
776	}	461	}
777		462
778	static void create_pipe ()	463	static void atfork_child (void)
779	{	464	{
780	if (pipe (respipe))	465	create_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	}	466	}
789		467
790	/*****************************************************************************/	468	static SV *
791	/* work around various missing functions */	469	get_cb (SV *cb_sv)
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	{	470	{
806	ssize_t res;	471	HV *st;
807	off_t ooffset;	472	GV *gvp;
		473	CV *cv;
808		474
809	LOCK (preadwritelock);	475	if (!SvOK (cb_sv))
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;	476	return 0;
897		477
898	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
899	# if __linux
900	res = sendfile (ofd, ifd, &offset, count);
901		479
902	# elif __freebsd	480	if (!cv)
903	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
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		482
911	if (res < 0 && sbytes)	483	return (SV *)cv;
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	}
1198
1199	static void atfork_child (void)
1200	{
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 ();
1229
1230	atfork_parent ();
1231	}	484	}
1232		485
1233	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
1234	aio_req req; \	488	aio_req req; \
1235	int req_pri = next_pri; \	489	int req_pri = next_pri; \
1236	next_pri = DEFAULT_PRI + PRI_BIAS; \	490	next_pri = EIO_PRI_DEFAULT; \
1237	\	491	\
1238	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
1239	croak ("callback must be undef or of reference type"); \
1240	\	493	\
1241	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
1242	if (!req) \	495	if (!req) \
1243	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
1244	\	497	\
1245	req->callback = newSVsv (callback); \	498	req->callback = SvREFCNT_inc (cb_cv); \
1246	req->pri = req_pri	499	req->pri = req_pri
1247		500
1248	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
1249	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
1250	\	505	\
1251	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
1252	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1253		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
		518	}
		519
1254	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
1255		521
1256	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
1257		523
1258	BOOT:	524	BOOT:
1259	{	525	{
1260	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
1261		527
1262	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1263	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1264	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1265	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1266	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
1267	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1268		540
1269	create_pipe ();	541	create_respipe ();
1270	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	542
		543	if (eio_init (want_poll, done_poll) < 0)
		544	croak ("IO::AIO: unable to initialise eio library");
		545
		546	/* atfork child called in fifo order, so before eio's handler */
		547	X_THREAD_ATFORK (0, 0, atfork_child);
1271	}	548	}
1272		549
1273	void	550	void
1274	max_poll_reqs (int nreqs)	551	max_poll_reqs (int nreqs)
1275	PROTOTYPE: $	552	PROTOTYPE: $
1276	CODE:	553	CODE:
1277	max_poll_reqs = nreqs;	554	eio_set_max_poll_reqs (nreqs);
1278		555
1279	void	556	void
1280	max_poll_time (double nseconds)	557	max_poll_time (double nseconds)
1281	PROTOTYPE: $	558	PROTOTYPE: $
1282	CODE:	559	CODE:
1283	max_poll_time = nseconds * AIO_TICKS;	560	eio_set_max_poll_time (nseconds);
1284		561
1285	void	562	void
1286	min_parallel (int nthreads)	563	min_parallel (int nthreads)
1287	PROTOTYPE: $	564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
1288		567
1289	void	568	void
1290	max_parallel (int nthreads)	569	max_parallel (int nthreads)
1291	PROTOTYPE: $	570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
1292		573
1293	void	574	void
1294	max_idle (int nthreads)	575	max_idle (int nthreads)
1295	PROTOTYPE: $	576	PROTOTYPE: $
1296	CODE:	577	CODE:
1297	set_max_idle (nthreads);	578	eio_set_max_idle (nthreads);
1298		579
1299	int	580	void
1300	max_outstanding (int maxreqs)	581	max_outstanding (int maxreqs)
1301	PROTOTYPE: $	582	PROTOTYPE: $
1302	CODE:	583	CODE:
1303	RETVAL = max_outstanding;
1304	max_outstanding = maxreqs;	584	max_outstanding = maxreqs;
1305	OUTPUT:
1306	RETVAL
1307		585
1308	void	586	void
1309	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	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: $$$;$	588	PROTOTYPE: $$$;$
1315	PPCODE:	589	PPCODE:
1316	{	590	{
1317	dREQ;	591	dREQ;
1318		592
1319	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
1320	req->sv1 = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
1321	req->ptr1 = SvPVbyte_nolen (pathname);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	req->int1 = flags;	596	req->int1 = flags;
1323	req->mode = mode;	597	req->int2 = mode;
1324		598
1325	REQ_SEND;	599	REQ_SEND;
1326	}	600	}
1327		601
1328	void	602	void
1329	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1330	SV * fh
1331	SV * callback
1332	PROTOTYPE: $;$	604	PROTOTYPE: $;$
1333	ALIAS:	605	ALIAS:
1334	aio_close = REQ_CLOSE
1335	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
1336	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
1337	PPCODE:	608	PPCODE:
1338	{	609	{
		610	int fd = extract_fd (fh, 0);
1339	dREQ;	611	dREQ;
1340		612
1341	req->type = ix;	613	req->type = ix;
1342	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
1343	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
1344		616
1345	REQ_SEND (req);	617	REQ_SEND (req);
1346	}	618	}
1347		619
1348	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
1349	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1350	SV * fh
1351	UV offset
1352	UV length
1353	SV * data
1354	UV dataoffset
1355	SV * callback
1356	ALIAS:	669	ALIAS:
1357	aio_read = REQ_READ	670	aio_read = EIO_READ
1358	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
1359	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
1360	PPCODE:	673	PPCODE:
1361	{	674	{
1362	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
1363	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
1364		678	UV len = SvUV (length);
1365	SvUPGRADE (data, SVt_PV);
1366	SvPOK_on (data);
1367		679
1368	if (dataoffset < 0)	680	if (dataoffset < 0)
1369	dataoffset += svlen;	681	dataoffset += svlen;
1370		682
1371	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
1372	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
1373		685
1374	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
1375	{	687	{
1376	/* write: check length and adjust. */	688	/* write: check length and adjust. */
1377	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
1378	length = svlen - dataoffset;	690	len = svlen - dataoffset;
1379	}	691	}
1380	else	692	else
1381	{	693	{
1382	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
1383	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
1384	}	697	}
1385
1386	if (length < 0)
1387	croak ("length must not be negative");
1388		698
1389	{	699	{
1390	dREQ;	700	dREQ;
1391		701
1392	req->type = ix;	702	req->type = ix;
1393	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
1394	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
1395	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1396	req->offs = offset;
1397	req->size = length;	706	req->size = len;
1398	req->sv1 = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
1399	req->ptr1 = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
1400	req->stroffset = dataoffset;	709	req->stroffset = dataoffset;
1401		710
1402	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
1403	{	712	{
1404	SvREADONLY_on (data);	713	SvREADONLY_on (data);
1405	req->flags |= FLAG_DATA_RO_OFF;	714	req->flags |= FLAG_SV2_RO_OFF;
1406	}	715	}
1407		716
1408	REQ_SEND;	717	REQ_SEND;
1409	}	718	}
1410	}	719	}
1411		720
1412	void	721	void
1413	aio_readlink (path,callback=&PL_sv_undef)	722	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1414	SV * path
1415	SV * callback
1416	PROTOTYPE: $$;$	723	PROTOTYPE: $$;$
1417	PPCODE:	724	PPCODE:
1418	{	725	{
1419	SV *data;	726	SV *data;
1420	dREQ;	727	dREQ;
1421		728
1422	data = newSV (NAME_MAX);
1423	SvPOK_on (data);
1424
1425	req->type = REQ_READLINK;	729	req->type = EIO_READLINK;
1426	req->fh = newSVsv (path);	730	req->sv1 = newSVsv (path);
1427	req->ptr2 = SvPVbyte_nolen (path);
1428	req->sv1 = data;
1429	req->ptr1 = SvPVbyte_nolen (data);	731	req->ptr1 = SvPVbyte_nolen (req->sv1);
1430		732
1431	REQ_SEND;	733	REQ_SEND;
1432	}	734	}
1433		735
1434	void	736	void
1435	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	737	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1436	SV * out_fh
1437	SV * in_fh
1438	UV in_offset
1439	UV length
1440	SV * callback
1441	PROTOTYPE: $$$$;$	738	PROTOTYPE: $$$$;$
1442	PPCODE:	739	PPCODE:
1443	{	740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
1444	dREQ;	743	dREQ;
1445		744
1446	req->type = REQ_SENDFILE;	745	req->type = EIO_SENDFILE;
1447	req->fh = newSVsv (out_fh);	746	req->sv1 = newSVsv (out_fh);
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	747	req->int1 = ofd;
1449	req->sv2 = newSVsv (in_fh);	748	req->sv2 = newSVsv (in_fh);
1450	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	749	req->int2 = ifd;
1451	req->offs = in_offset;	750	req->offs = SvVAL64 (in_offset);
1452	req->size = length;	751	req->size = length;
1453		752
1454	REQ_SEND;	753	REQ_SEND;
1455	}	754	}
1456		755
1457	void	756	void
1458	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1459	SV * fh
1460	UV offset
1461	IV length
1462	SV * callback
1463	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
1464	PPCODE:	759	PPCODE:
1465	{	760	{
		761	int fd = extract_fd (fh, 0);
1466	dREQ;	762	dREQ;
1467		763
1468	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
1469	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
1470	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
1471	req->offs = offset;	767	req->offs = SvVAL64 (offset);
1472	req->size = length;	768	req->size = length;
1473		769
1474	REQ_SEND;	770	REQ_SEND;
1475	}	771	}
1476		772
1477	void	773	void
1478	aio_stat (fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1479	SV * fh_or_path
1480	SV * callback
1481	ALIAS:	775	ALIAS:
1482	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
1483	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
1484	PPCODE:	778	PPCODE:
1485	{	779	{
1486	dREQ;	780	dREQ;
1487		781
1488	New (0, req->statdata, 1, Stat_t);	782	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		783
1495	if (SvPOK (fh_or_path))	784	if (SvPOK (req->sv1))
1496	{	785	{
1497	req->type = ix;	786	req->type = ix;
1498	req->sv1 = newSVsv (fh_or_path);
1499	req->ptr1 = SvPVbyte_nolen (fh_or_path);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
1500	}	788	}
1501	else	789	else
1502	{	790	{
1503	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
1504	req->fh = newSVsv (fh_or_path);
1505	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	792	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1506	}	793	}
1507		794
1508	REQ_SEND;	795	REQ_SEND;
1509	}	796	}
1510		797
1511	void	798	void
		799	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		800	PPCODE:
		801	{
		802	dREQ;
		803
		804	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		805	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		806	req->sv1 = newSVsv (fh_or_path);
		807
		808	if (SvPOK (req->sv1))
		809	{
		810	req->type = EIO_UTIME;
		811	req->ptr1 = SvPVbyte_nolen (req->sv1);
		812	}
		813	else
		814	{
		815	req->type = EIO_FUTIME;
		816	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		817	}
		818
		819	REQ_SEND;
		820	}
		821
		822	void
		823	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		824	PPCODE:
		825	{
		826	dREQ;
		827
		828	req->sv1 = newSVsv (fh_or_path);
		829	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		830
		831	if (SvPOK (req->sv1))
		832	{
		833	req->type = EIO_TRUNCATE;
		834	req->ptr1 = SvPVbyte_nolen (req->sv1);
		835	}
		836	else
		837	{
		838	req->type = EIO_FTRUNCATE;
		839	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		840	}
		841
		842	REQ_SEND;
		843	}
		844
		845	void
		846	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		847	ALIAS:
		848	aio_chmod = EIO_CHMOD
		849	aio_mkdir = EIO_MKDIR
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->int2 = mode;
		855	req->sv1 = newSVsv (fh_or_path);
		856
		857	if (SvPOK (req->sv1))
		858	{
		859	req->type = ix;
		860	req->ptr1 = SvPVbyte_nolen (req->sv1);
		861	}
		862	else
		863	{
		864	req->type = EIO_FCHMOD;
		865	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		866	}
		867
		868	REQ_SEND;
		869	}
		870
		871	void
		872	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		873	PPCODE:
		874	{
		875	dREQ;
		876
		877	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		878	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		879	req->sv1 = newSVsv (fh_or_path);
		880
		881	if (SvPOK (req->sv1))
		882	{
		883	req->type = EIO_CHOWN;
		884	req->ptr1 = SvPVbyte_nolen (req->sv1);
		885	}
		886	else
		887	{
		888	req->type = EIO_FCHOWN;
		889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
1512	aio_unlink (pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1513	SV * pathname
1514	SV * callback
1515	ALIAS:	897	ALIAS:
1516	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
1517	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
1518	aio_readdir = REQ_READDIR	900	aio_readdir = EIO_READDIR
1519	PPCODE:	901	PPCODE:
1520	{	902	{
1521	dREQ;	903	dREQ;
1522		904
1523	req->type = ix;	905	req->type = ix;
1524	req->sv1 = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
1525	req->ptr1 = SvPVbyte_nolen (pathname);	907	req->ptr1 = SvPVbyte_nolen (req->sv1);
		908
		909	REQ_SEND;
		910	}
		911
		912	void
		913	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		914	ALIAS:
		915	aio_link = EIO_LINK
		916	aio_symlink = EIO_SYMLINK
		917	aio_rename = EIO_RENAME
		918	PPCODE:
		919	{
		920	dREQ;
		921
		922	req->type = ix;
		923	req->sv1 = newSVsv (oldpath);
		924	req->ptr1 = SvPVbyte_nolen (req->sv1);
		925	req->sv2 = newSVsv (newpath);
		926	req->ptr2 = SvPVbyte_nolen (req->sv2);
1526		927
1527	REQ_SEND;	928	REQ_SEND;
1528	}	929	}
1529		930
1530	void	931	void
1531	aio_link (oldpath,newpath,callback=&PL_sv_undef)	932	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:	933	PPCODE:
1540	{	934	{
1541	dREQ;	935	dREQ;
1542		936
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;	937	req->type = EIO_MKNOD;
1563	req->sv1 = newSVsv (pathname);	938	req->sv1 = newSVsv (pathname);
1564	req->ptr1 = SvPVbyte_nolen (pathname);	939	req->ptr1 = SvPVbyte_nolen (req->sv1);
1565	req->mode = (mode_t)mode;	940	req->int2 = (mode_t)mode;
1566	req->offs = dev;	941	req->offs = dev;
1567		942
1568	REQ_SEND;	943	REQ_SEND;
1569	}	944	}
1570		945
1571	void	946	void
1572	aio_busy (delay,callback=&PL_sv_undef)	947	aio_busy (double delay, SV *callback=&PL_sv_undef)
1573	double delay
1574	SV * callback
1575	PPCODE:	948	PPCODE:
1576	{	949	{
1577	dREQ;	950	dREQ;
1578		951
1579	req->type = REQ_BUSY;	952	req->type = EIO_BUSY;
1580	req->int1 = delay < 0. ? 0 : delay;	953	req->nv1 = delay < 0. ? 0. : delay;
1581	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1582		954
1583	REQ_SEND;	955	REQ_SEND;
1584	}	956	}
1585		957
1586	void	958	void
1587	aio_group (callback=&PL_sv_undef)	959	aio_group (SV *callback=&PL_sv_undef)
1588	SV * callback
1589	PROTOTYPE: ;$	960	PROTOTYPE: ;$
1590	PPCODE:	961	PPCODE:
1591	{	962	{
1592	dREQ;	963	dREQ;
1593		964
1594	req->type = REQ_GROUP;	965	req->type = EIO_GROUP;
1595		966
1596	req_send (req);	967	req_submit (req);
1597	XPUSHs (req_sv (req, AIO_GRP_KLASS));	968	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1598	}	969	}
1599		970
1600	void	971	void
1601	aio_nop (callback=&PL_sv_undef)	972	aio_nop (SV *callback=&PL_sv_undef)
1602	SV * callback	973	ALIAS:
		974	aio_nop = EIO_NOP
		975	aio_sync = EIO_SYNC
1603	PPCODE:	976	PPCODE:
1604	{	977	{
1605	dREQ;	978	dREQ;
1606		979
1607	req->type = REQ_NOP;	980	req->type = ix;
1608		981
1609	REQ_SEND;	982	REQ_SEND;
1610	}	983	}
1611		984
1612	int	985	int
1613	aioreq_pri (int pri = 0)	986	aioreq_pri (int pri = 0)
1614	PROTOTYPE: ;$	987	PROTOTYPE: ;$
1615	CODE:	988	CODE:
1616	RETVAL = next_pri - PRI_BIAS;	989	RETVAL = next_pri;
1617	if (items > 0)	990	if (items > 0)
1618	{	991	{
1619	if (pri < PRI_MIN) pri = PRI_MIN;	992	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1620	if (pri > PRI_MAX) pri = PRI_MAX;	993	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1621	next_pri = pri + PRI_BIAS;	994	next_pri = pri;
1622	}	995	}
1623	OUTPUT:	996	OUTPUT:
1624	RETVAL	997	RETVAL
1625		998
1626	void	999	void
1627	aioreq_nice (int nice = 0)	1000	aioreq_nice (int nice = 0)
1628	CODE:	1001	CODE:
1629	nice = next_pri - nice;	1002	nice = next_pri - nice;
1630	if (nice < PRI_MIN) nice = PRI_MIN;	1003	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1631	if (nice > PRI_MAX) nice = PRI_MAX;	1004	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1632	next_pri = nice + PRI_BIAS;	1005	next_pri = nice;
1633		1006
1634	void	1007	void
1635	flush ()	1008	flush ()
1636	PROTOTYPE:	1009	PROTOTYPE:
1637	CODE:	1010	CODE:
1638	while (nreqs)	1011	while (eio_nreqs ())
1639	{	1012	{
1640	poll_wait ();	1013	poll_wait ();
1641	poll_cb (0);	1014	poll_cb ();
1642	}	1015	}
1643		1016
1644	void	1017	int
1645	poll()	1018	poll()
1646	PROTOTYPE:	1019	PROTOTYPE:
1647	CODE:	1020	CODE:
1648	if (nreqs)
1649	{
1650	poll_wait ();	1021	poll_wait ();
1651	poll_cb (0);	1022	RETVAL = poll_cb ();
1652	}	1023	OUTPUT:
		1024	RETVAL
1653		1025
1654	int	1026	int
1655	poll_fileno()	1027	poll_fileno()
1656	PROTOTYPE:	1028	PROTOTYPE:
1657	CODE:	1029	CODE:
…		…
1669		1041
1670	void	1042	void
1671	poll_wait()	1043	poll_wait()
1672	PROTOTYPE:	1044	PROTOTYPE:
1673	CODE:	1045	CODE:
1674	if (nreqs)
1675	poll_wait ();	1046	poll_wait ();
1676		1047
1677	int	1048	int
1678	nreqs()	1049	nreqs()
1679	PROTOTYPE:	1050	PROTOTYPE:
1680	CODE:	1051	CODE:
1681	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
1682	OUTPUT:	1053	OUTPUT:
1683	RETVAL	1054	RETVAL
1684		1055
1685	int	1056	int
1686	nready()	1057	nready()
1687	PROTOTYPE:	1058	PROTOTYPE:
1688	CODE:	1059	CODE:
1689	RETVAL = get_nready ();	1060	RETVAL = eio_nready ();
1690	OUTPUT:	1061	OUTPUT:
1691	RETVAL	1062	RETVAL
1692		1063
1693	int	1064	int
1694	npending()	1065	npending()
1695	PROTOTYPE:	1066	PROTOTYPE:
1696	CODE:	1067	CODE:
1697	RETVAL = get_npending ();	1068	RETVAL = eio_npending ();
1698	OUTPUT:	1069	OUTPUT:
1699	RETVAL	1070	RETVAL
1700		1071
1701	int	1072	int
1702	nthreads()	1073	nthreads()
1703	PROTOTYPE:	1074	PROTOTYPE:
1704	CODE:	1075	CODE:
1705	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1076	RETVAL = eio_nthreads ();
1706	RETVAL = started;
1707	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1708	OUTPUT:	1077	OUTPUT:
1709	RETVAL	1078	RETVAL
1710		1079
		1080	void _on_next_submit (SV *cb)
		1081	CODE:
		1082	SvREFCNT_dec (on_next_submit);
		1083	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1084
1711	PROTOTYPES: DISABLE	1085	PROTOTYPES: DISABLE
1712		1086
1713	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1087	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1714		1088
1715	void	1089	void
1716	cancel (aio_req_ornot req)	1090	cancel (aio_req_ornot req)
1717	CODE:	1091	CODE:
1718	req_cancel (req);	1092	eio_cancel (req);
1719		1093
1720	void	1094	void
1721	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1095	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1722	CODE:	1096	PPCODE:
		1097	{
		1098	if (GIMME_V != G_VOID)
		1099	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1100
		1101	if (items > 1)
		1102	{
		1103	SV *cb_cv = get_cb (callback);
		1104
1723	SvREFCNT_dec (req->callback);	1105	SvREFCNT_dec (req->callback);
1724	req->callback = newSVsv (callback);	1106	req->callback = SvREFCNT_inc (cb_cv);
		1107	}
		1108	}
1725		1109
1726	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1110	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1727		1111
1728	void	1112	void
1729	add (aio_req grp, ...)	1113	add (aio_req grp, ...)
1730	PPCODE:	1114	PPCODE:
1731	{	1115	{
1732	int i;	1116	int i;
1733	aio_req req;
1734		1117
1735	if (grp->int1 == 2)	1118	if (grp->int1 == 2)
1736	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1119	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1737		1120
1738	for (i = 1; i < items; ++i )	1121	for (i = 1; i < items; ++i )
1739	{	1122	{
		1123	aio_req req;
		1124
1740	if (GIMME_V != G_VOID)	1125	if (GIMME_V != G_VOID)
1741	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1126	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1742		1127
1743	req = SvAIO_REQ (ST (i));	1128	req = SvAIO_REQ (ST (i));
1744		1129
1745	if (req)	1130	if (req)
1746	{	1131	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	}	1132	}
1759	}	1133	}
1760		1134
1761	void	1135	void
1762	cancel_subs (aio_req_ornot req)	1136	cancel_subs (aio_req_ornot req)
…		…
1787	grp->errorno = errorno;	1161	grp->errorno = errorno;
1788		1162
1789	void	1163	void
1790	limit (aio_req grp, int limit)	1164	limit (aio_req grp, int limit)
1791	CODE:	1165	CODE:
1792	grp->int2 = limit;	1166	eio_grp_limit (grp, limit);
1793	aio_grp_feed (grp);
1794		1167
1795	void	1168	void
1796	feed (aio_req grp, SV *callback=&PL_sv_undef)	1169	feed (aio_req grp, SV *callback=&PL_sv_undef)
1797	CODE:	1170	CODE:
1798	{	1171	{
1799	SvREFCNT_dec (grp->sv2);	1172	SvREFCNT_dec (grp->sv2);
1800	grp->sv2 = newSVsv (callback);	1173	grp->sv2 = newSVsv (callback);
		1174	grp->feed = aio_grp_feed;
1801		1175
1802	if (grp->int2 <= 0)	1176	if (grp->int2 <= 0)
1803	grp->int2 = 2;	1177	grp->int2 = 2;
1804		1178
1805	aio_grp_feed (grp);	1179	eio_grp_limit (grp, grp->int2);
1806	}	1180	}
1807		1181

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