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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.87 by root, Mon Oct 30 23:42:27 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	off_t offs;
117	size_t size;
118	ssize_t result;
119
120	STRLEN stroffset;	107	STRLEN stroffset; \
121	int type;	108	SV *self;
122	int int1, int2;
123	int errorno;
124	mode_t mode; /* open */
125		109
126	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
127	unsigned char pri;
128		111
129	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
130	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
131	} 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)
132		118
133	enum {	119	enum {
134	FLAG_CANCELLED = 0x01,
135	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
136	FLAG_PTR2_FREE = 0x80, /* need free(ptr2) */
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_SV1_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->flags & FLAG_CANCELLED) && SvOK (req->callback))	217	if (!EIO_CANCELLED (req) && req->callback)
405	{	218	{
406	ENTER;	219	ENTER;
407	SAVETMPS;	220	SAVETMPS;
408	PUSHMARK (SP);	221	PUSHMARK (SP);
409	EXTEND (SP, 1);	222	EXTEND (SP, 1);
410		223
411	switch (req->type)	224	switch (req->type)
412	{	225	{
413	case REQ_READDIR:	226	case EIO_READDIR:
414	{	227	{
415	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
416		229
417	if (req->result >= 0)	230	if (req->result >= 0)
418	{	231	{
…		…
435		248
436	PUSHs (rv);	249	PUSHs (rv);
437	}	250	}
438	break;	251	break;
439		252
440	case REQ_OPEN:	253	case EIO_OPEN:
441	{	254	{
442	/* convert fd to fh */	255	/* convert fd to fh */
443	SV *fh;	256	SV *fh = &PL_sv_undef;
444		257
445	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
446	PUTBACK;	259	{
447	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
448	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);
449		267
450	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	);
451		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
452	PUSHMARK (SP);	280	PUSHs (fh);
453	XPUSHs (sv_2mortal (fh));
454	}	281	}
455	break;	282	break;
456		283
457	case REQ_GROUP:	284	case EIO_GROUP:
458	req->int1 = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
459		286
460	if (req->sv1)	287	if (req->sv1)
461	{	288	{
462	int i;	289	int i;
…		…
466	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
467	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
468	}	295	}
469	break;	296	break;
470		297
471	case REQ_NOP:	298	case EIO_NOP:
472	case REQ_BUSY:	299	case EIO_BUSY:
473	break;	300	break;
474		301
475	case REQ_READLINK:	302	case EIO_READLINK:
476	if (req->result > 0)	303	if (req->result > 0)
477	{	304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
478	SvCUR_set (req->sv1, req->result);
479	*SvEND (req->sv1) = 0;
480	PUSHs (req->sv1);
481	}
482	break;	305	break;
483		306
484	case REQ_STAT:	307	case EIO_STAT:
485	case REQ_LSTAT:	308	case EIO_LSTAT:
486	case REQ_FSTAT:	309	case EIO_FSTAT:
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;	311	PL_laststatval = req->result;
489	PL_statcache = *(Stat_t *)(req->ptr2);	312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
490	PUSHs (sv_2mortal (newSViv (req->result)));	313	PUSHs (sv_2mortal (newSViv (req->result)));
491	break;	314	break;
492		315
493	case REQ_READ:	316	case EIO_READ:
		317	{
494	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));
495	*SvEND (req->sv1) = 0;	319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
496	PUSHs (sv_2mortal (newSViv (req->result)));	322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
497	break;	324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
498		330
499	default:	331	default:
500	PUSHs (sv_2mortal (newSViv (req->result)));	332	PUSHs (sv_2mortal (newSViv (req->result)));
501	break;	333	break;
502	}	334	}
503		335
504	errno = req->errorno;	336	errno = req->errorno;
505		337
506	PUTBACK;	338	PUTBACK;
507	call_sv (req->callback, G_VOID | G_EVAL);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
508	SPAGAIN;	340	SPAGAIN;
509		341
510	FREETMPS;	342	FREETMPS;
511	LEAVE;	343	LEAVE;
		344
		345	PUTBACK;
512	}	346	}
513		347
514	if (req->grp)	348	return !!SvTRUE (ERRSV);
515	{
516	aio_req grp = req->grp;
517
518	/* unlink request */
519	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
520	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
521
522	if (grp->grp_first == req)
523	grp->grp_first = req->grp_next;
524
525	aio_grp_dec (grp);
526	}
527
528	if (SvTRUE (ERRSV))
529	{
530	req_free (req);
531	croak (0);
532	}
533	}	349	}
534		350
535	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
536	{	352	{
537	if (req->self)	353	if (req->self)
538	{	354	{
539	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
540	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
541	}	357	}
542		358
543	SvREFCNT_dec (req->fh);
544	SvREFCNT_dec (req->sv1);	359	SvREFCNT_dec (req->sv1);
545	SvREFCNT_dec (req->sv2);	360	SvREFCNT_dec (req->sv2);
546	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
547		362
548	if (req->flags & FLAG_PTR2_FREE)
549	free (req->ptr2);
550
551	Safefree (req);	363	Safefree (req);
552	}	364	}
553		365
554	static void req_cancel_subs (aio_req grp)	366	static void req_cancel_subs (aio_req grp)
555	{	367	{
556	aio_req sub;	368	aio_req sub;
557		369
558	if (grp->type != REQ_GROUP)	370	if (grp->type != EIO_GROUP)
559	return;	371	return;
560		372
561	SvREFCNT_dec (grp->sv2);	373	SvREFCNT_dec (grp->sv2);
562	grp->sv2 = 0;	374	grp->sv2 = 0;
563		375
564	for (sub = grp->grp_first; sub; sub = sub->grp_next)	376	eio_grp_cancel (grp);
565	req_cancel (sub);
566	}	377	}
567		378
568	static void req_cancel (aio_req req)	379	#ifdef USE_SOCKETS_AS_HANDLES
569	{	380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
570	req->flags |= FLAG_CANCELLED;	381	#else
571		382	# define TO_SOCKET(x) (x)
572	req_cancel_subs (req);
573	}
574
575	static void *aio_proc(void *arg);
576
577	static void start_thread (void)
578	{
579	sigset_t fullsigset, oldsigset;
580	pthread_attr_t attr;
581
582	worker *wrk = calloc (1, sizeof (worker));
583
584	if (!wrk)
585	croak ("unable to allocate worker thread data");
586
587	pthread_attr_init (&attr);
588	pthread_attr_setstacksize (&attr, STACKSIZE);
589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
590	#ifdef PTHREAD_SCOPE_PROCESS
591	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
592	#endif	383	#endif
593		384
594	sigfillset (&fullsigset);	385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
595		389
596	LOCK (wrklock);	390	if (respipe [1] >= 0)
597	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	391	respipe_close (TO_SOCKET (respipe [1]));
598		392
599	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)
600	{	401	{
601	wrk->prev = &wrk_first;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
602	wrk->next = wrk_first.next;	403	croak ("unable to initialize result pipe(2)");
603	wrk_first.next->prev = wrk;	404
604	wrk_first.next = wrk;	405	respipe_close (respipe [0]);
605	++started;	406	respipe [0] = old_readfd;
606	}	407	}
607	else
608	free (wrk);
609		408
610	sigprocmask (SIG_SETMASK, &oldsigset, 0);	409	#ifdef _WIN32
611	UNLOCK (wrklock);	410	int arg = 1;
612	}	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)");
613		418
614	static void maybe_start_thread ()	419	respipe_osf [0] = TO_SOCKET (respipe [0]);
615	{	420	respipe_osf [1] = TO_SOCKET (respipe [1]);
616	if (get_nthreads () >= wanted)
617	return;
618
619	/* todo: maybe use idle here, but might be less exact */
620	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
621	return;
622
623	start_thread ();
624	}	421	}
625		422
626	static void req_send (aio_req req)
627	{
628	++nreqs;
629
630	LOCK (reqlock);
631	++nready;
632	reqq_push (&req_queue, req);
633	pthread_cond_signal (&reqwait);
634	UNLOCK (reqlock);
635
636	maybe_start_thread ();
637	}
638
639	static void end_thread (void)
640	{
641	aio_req req;
642
643	Newz (0, req, 1, aio_cb);
644
645	req->type = REQ_QUIT;
646	req->pri = PRI_MAX + PRI_BIAS;
647
648	LOCK (reqlock);
649	reqq_push (&req_queue, req);
650	pthread_cond_signal (&reqwait);
651	UNLOCK (reqlock);
652
653	LOCK (wrklock);
654	--started;
655	UNLOCK (wrklock);
656	}
657
658	static void set_max_idle (int nthreads)
659	{
660	if (WORDACCESS_UNSAFE) LOCK (reqlock);
661	max_idle = nthreads <= 0 ? 1 : nthreads;
662	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
663	}
664
665	static void min_parallel (int nthreads)
666	{
667	if (wanted < nthreads)
668	wanted = nthreads;
669	}
670
671	static void max_parallel (int nthreads)
672	{
673	if (wanted > nthreads)
674	wanted = nthreads;
675
676	while (started > wanted)
677	end_thread ();
678	}
679
680	static void poll_wait ()	423	static void poll_wait (void)
681	{	424	{
682	fd_set rfd;	425	fd_set rfd;
683		426
684	while (nreqs)	427	while (eio_nreqs ())
685	{	428	{
686	int size;	429	int size;
687	if (WORDACCESS_UNSAFE) LOCK (reslock);	430
		431	X_LOCK (reslock);
688	size = res_queue.size;	432	size = res_queue.size;
689	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	433	X_UNLOCK (reslock);
690		434
691	if (size)	435	if (size)
692	return;	436	return;
693		437
694	maybe_start_thread ();	438	etp_maybe_start_thread ();
695		439
696	FD_ZERO(&rfd);	440	FD_ZERO (&rfd);
697	FD_SET(respipe [0], &rfd);	441	FD_SET (respipe [0], &rfd);
698		442
699	select (respipe [0] + 1, &rfd, 0, 0, 0);	443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
700	}	444	}
701	}	445	}
702		446
703	static int poll_cb ()	447	static int poll_cb (void)
704	{	448	{
705	dSP;
706	int count = 0;
707	int maxreqs = max_poll_reqs;
708	int do_croak = 0;
709	struct timeval tv_start, tv_now;
710	aio_req req;
711
712	if (max_poll_time)
713	gettimeofday (&tv_start, 0);
714
715	for (;;)	449	for (;;)
716	{	450	{
717	for (;;)	451	int res = eio_poll ();
718	{
719	maybe_start_thread ();
720		452
721	LOCK (reslock);	453	if (res > 0)
722	req = reqq_shift (&res_queue);
723
724	if (req)
725	{
726	--npending;
727
728	if (!res_queue.size)
729	{
730	/* read any signals sent by the worker threads */
731	char buf [32];
732	while (read (respipe [0], buf, 32) == 32)
733	;
734	}
735	}
736
737	UNLOCK (reslock);
738
739	if (!req)
740	break;
741
742	--nreqs;
743
744	if (req->type == REQ_GROUP && req->size)
745	{
746	req->int1 = 1; /* mark request as delayed */
747	continue;
748	}
749	else
750	{
751	req_invoke (req);
752
753	count++;
754	}
755
756	req_free (req);
757
758	if (maxreqs && !--maxreqs)
759	break;
760
761	if (max_poll_time)
762	{
763	gettimeofday (&tv_now, 0);
764
765	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
766	break;
767	}
768	}
769
770	if (nreqs <= max_outstanding)
771	break;	454	croak (0);
		455
		456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
772		458
773	poll_wait ();	459	poll_wait ();
774
775	++maxreqs;
776	}	460	}
777
778	return count;
779	}	461	}
780		462
781	static void create_pipe ()	463	static void atfork_child (void)
782	{	464	{
783	if (pipe (respipe))	465	create_respipe ();
784	croak ("unable to initialize result pipe");
785
786	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
787	croak ("cannot set result pipe to nonblocking mode");
788
789	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
790	croak ("cannot set result pipe to nonblocking mode");
791	}	466	}
792		467
793	/*****************************************************************************/	468	static SV *
794	/* work around various missing functions */	469	get_cb (SV *cb_sv)
795
796	#if !HAVE_PREADWRITE
797	# define pread aio_pread
798	# define pwrite aio_pwrite
799
800	/*
801	* make our pread/pwrite safe against themselves, but not against
802	* normal read/write by using a mutex. slows down execution a lot,
803	* but that's your problem, not mine.
804	*/
805	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
806
807	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
808	{	470	{
809	ssize_t res;	471	HV *st;
810	off_t ooffset;	472	GV *gvp;
		473	CV *cv;
811		474
812	LOCK (preadwritelock);	475	if (!SvOK (cb_sv))
813	ooffset = lseek (fd, 0, SEEK_CUR);
814	lseek (fd, offset, SEEK_SET);
815	res = read (fd, buf, count);
816	lseek (fd, ooffset, SEEK_SET);
817	UNLOCK (preadwritelock);
818
819	return res;
820	}
821
822	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
823	{
824	ssize_t res;
825	off_t ooffset;
826
827	LOCK (preadwritelock);
828	ooffset = lseek (fd, 0, SEEK_CUR);
829	lseek (fd, offset, SEEK_SET);
830	res = write (fd, buf, count);
831	lseek (fd, offset, SEEK_SET);
832	UNLOCK (preadwritelock);
833
834	return res;
835	}
836	#endif
837
838	#if !HAVE_FDATASYNC
839	# define fdatasync fsync
840	#endif
841
842	#if !HAVE_READAHEAD
843	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
844
845	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
846	{
847	dBUF;
848
849	while (count > 0)
850	{
851	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
852
853	pread (fd, aio_buf, len, offset);
854	offset += len;
855	count -= len;
856	}
857
858	errno = 0;
859	}
860
861	#endif
862
863	#if !HAVE_READDIR_R
864	# define readdir_r aio_readdir_r
865
866	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
867
868	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
869	{
870	struct dirent *e;
871	int errorno;
872
873	LOCK (readdirlock);
874
875	e = readdir (dirp);
876	errorno = errno;
877
878	if (e)
879	{
880	*res = ent;
881	strcpy (ent->d_name, e->d_name);
882	}
883	else
884	*res = 0;
885
886	UNLOCK (readdirlock);
887
888	errno = errorno;
889	return e ? 0 : -1;
890	}
891	#endif
892
893	/* sendfile always needs emulation */
894	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
895	{
896	ssize_t res;
897
898	if (!count)
899	return 0;	476	return 0;
900		477
901	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
902	# if __linux
903	res = sendfile (ofd, ifd, &offset, count);
904		479
905	# elif __freebsd	480	if (!cv)
906	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
907	* Of course, the freebsd sendfile is a dire hack with no thoughts
908	* wasted on making it similar to other I/O functions.
909	*/
910	{
911	off_t sbytes;
912	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
913		482
914	if (res < 0 && sbytes)	483	return (SV *)cv;
915	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
916	res = sbytes;
917	}
918
919	# elif __hpux
920	res = sendfile (ofd, ifd, offset, count, 0, 0);
921
922	# elif __solaris
923	{
924	struct sendfilevec vec;
925	size_t sbytes;
926
927	vec.sfv_fd = ifd;
928	vec.sfv_flag = 0;
929	vec.sfv_off = offset;
930	vec.sfv_len = count;
931
932	res = sendfilev (ofd, &vec, 1, &sbytes);
933
934	if (res < 0 && sbytes)
935	res = sbytes;
936	}
937
938	# endif
939	#else
940	res = -1;
941	errno = ENOSYS;
942	#endif
943
944	if (res < 0
945	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
946	#if __solaris
947	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
948	#endif
949	)
950	)
951	{
952	/* emulate sendfile. this is a major pain in the ass */
953	dBUF;
954
955	res = 0;
956
957	while (count)
958	{
959	ssize_t cnt;
960
961	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
962
963	if (cnt <= 0)
964	{
965	if (cnt && !res) res = -1;
966	break;
967	}
968
969	cnt = write (ofd, aio_buf, cnt);
970
971	if (cnt <= 0)
972	{
973	if (cnt && !res) res = -1;
974	break;
975	}
976
977	offset += cnt;
978	res += cnt;
979	count -= cnt;
980	}
981	}
982
983	return res;
984	}
985
986	/* read a full directory */
987	static void scandir_ (aio_req req, worker *self)
988	{
989	DIR *dirp;
990	union
991	{
992	struct dirent d;
993	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
994	} *u;
995	struct dirent *entp;
996	char *name, *names;
997	int memlen = 4096;
998	int memofs = 0;
999	int res = 0;
1000	int errorno;
1001
1002	LOCK (wrklock);
1003	self->dirp = dirp = opendir (req->ptr1);
1004	self->dbuf = u = malloc (sizeof (*u));
1005	req->flags |= FLAG_PTR2_FREE;
1006	req->ptr2 = names = malloc (memlen);
1007	UNLOCK (wrklock);
1008
1009	if (dirp && u && names)
1010	for (;;)
1011	{
1012	errno = 0;
1013	readdir_r (dirp, &u->d, &entp);
1014
1015	if (!entp)
1016	break;
1017
1018	name = entp->d_name;
1019
1020	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1021	{
1022	int len = strlen (name) + 1;
1023
1024	res++;
1025
1026	while (memofs + len > memlen)
1027	{
1028	memlen *= 2;
1029	LOCK (wrklock);
1030	req->ptr2 = names = realloc (names, memlen);
1031	UNLOCK (wrklock);
1032
1033	if (!names)
1034	break;
1035	}
1036
1037	memcpy (names + memofs, name, len);
1038	memofs += len;
1039	}
1040	}
1041
1042	if (errno)
1043	res = -1;
1044
1045	req->result = res;
1046	}
1047
1048	/*****************************************************************************/
1049
1050	static void *aio_proc (void *thr_arg)
1051	{
1052	aio_req req;
1053	struct timespec ts;
1054	worker *self = (worker *)thr_arg;
1055
1056	/* try to distribute timeouts somewhat evenly */
1057	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1058	* (1000000000UL / 1024UL);
1059
1060	for (;;)
1061	{
1062	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1063
1064	LOCK (reqlock);
1065
1066	for (;;)
1067	{
1068	self->req = req = reqq_shift (&req_queue);
1069
1070	if (req)
1071	break;
1072
1073	++idle;
1074
1075	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1076	== ETIMEDOUT)
1077	{
1078	if (idle > max_idle)
1079	{
1080	--idle;
1081	UNLOCK (reqlock);
1082	LOCK (wrklock);
1083	--started;
1084	UNLOCK (wrklock);
1085	goto quit;
1086	}
1087
1088	/* we are allowed to idle, so do so without any timeout */
1089	pthread_cond_wait (&reqwait, &reqlock);
1090	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1091	}
1092
1093	--idle;
1094	}
1095
1096	--nready;
1097
1098	UNLOCK (reqlock);
1099
1100	errno = 0; /* strictly unnecessary */
1101
1102	if (!(req->flags & FLAG_CANCELLED))
1103	switch (req->type)
1104	{
1105	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1106	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1107
1108	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1109	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1110
1111	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1112	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1113	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1114
1115	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1116	case REQ_CLOSE: req->result = close (req->int1); break;
1117	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1118	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
1127	case REQ_READDIR: scandir_ (req, self); break;
1128
1129	case REQ_BUSY:
1130	{
1131	struct timeval tv;
1132
1133	tv.tv_sec = req->int1;
1134	tv.tv_usec = req->int2;
1135
1136	req->result = select (0, 0, 0, 0, &tv);
1137	}
1138
1139	case REQ_GROUP:
1140	case REQ_NOP:
1141	break;
1142
1143	case REQ_QUIT:
1144	goto quit;
1145
1146	default:
1147	req->result = ENOSYS;
1148	break;
1149	}
1150
1151	req->errorno = errno;
1152
1153	LOCK (reslock);
1154
1155	++npending;
1156
1157	if (!reqq_push (&res_queue, req))
1158	/* write a dummy byte to the pipe so fh becomes ready */
1159	write (respipe [1], &respipe, 1);
1160
1161	self->req = 0;
1162	worker_clear (self);
1163
1164	UNLOCK (reslock);
1165	}
1166
1167	quit:
1168	LOCK (wrklock);
1169	worker_free (self);
1170	UNLOCK (wrklock);
1171
1172	return 0;
1173	}
1174
1175	/*****************************************************************************/
1176
1177	static void atfork_prepare (void)
1178	{
1179	LOCK (wrklock);
1180	LOCK (reqlock);
1181	LOCK (reslock);
1182	#if !HAVE_PREADWRITE
1183	LOCK (preadwritelock);
1184	#endif
1185	#if !HAVE_READDIR_R
1186	LOCK (readdirlock);
1187	#endif
1188	}
1189
1190	static void atfork_parent (void)
1191	{
1192	#if !HAVE_READDIR_R
1193	UNLOCK (readdirlock);
1194	#endif
1195	#if !HAVE_PREADWRITE
1196	UNLOCK (preadwritelock);
1197	#endif
1198	UNLOCK (reslock);
1199	UNLOCK (reqlock);
1200	UNLOCK (wrklock);
1201	}
1202
1203	static void atfork_child (void)
1204	{
1205	aio_req prv;
1206
1207	while (prv = reqq_shift (&req_queue))
1208	req_free (prv);
1209
1210	while (prv = reqq_shift (&res_queue))
1211	req_free (prv);
1212
1213	while (wrk_first.next != &wrk_first)
1214	{
1215	worker *wrk = wrk_first.next;
1216
1217	if (wrk->req)
1218	req_free (wrk->req);
1219
1220	worker_clear (wrk);
1221	worker_free (wrk);
1222	}
1223
1224	started = 0;
1225	idle = 0;
1226	nreqs = 0;
1227	nready = 0;
1228	npending = 0;
1229
1230	close (respipe [0]);
1231	close (respipe [1]);
1232	create_pipe ();
1233
1234	atfork_parent ();
1235	}	484	}
1236		485
1237	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
1238	aio_req req; \	488	aio_req req; \
1239	int req_pri = next_pri; \	489	int req_pri = next_pri; \
1240	next_pri = DEFAULT_PRI + PRI_BIAS; \	490	next_pri = EIO_PRI_DEFAULT; \
1241	\	491	\
1242	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
1243	croak ("callback must be undef or of reference type"); \
1244	\	493	\
1245	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
1246	if (!req) \	495	if (!req) \
1247	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
1248	\	497	\
1249	req->callback = newSVsv (callback); \	498	req->callback = SvREFCNT_inc (cb_cv); \
1250	req->pri = req_pri	499	req->pri = req_pri
1251		500
1252	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
1253	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
1254	\	505	\
1255	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
1256	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1257		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
1258	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
1259		521
1260	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
1261		523
1262	BOOT:	524	BOOT:
1263	{	525	{
1264	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
1265		527
1266	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1267	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1268	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1269	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1270	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
1271	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));
1272		540
1273	create_pipe ();	541	create_respipe ();
1274	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);
1275	}	548	}
1276		549
1277	void	550	void
1278	max_poll_reqs (int nreqs)	551	max_poll_reqs (int nreqs)
1279	PROTOTYPE: $	552	PROTOTYPE: $
1280	CODE:	553	CODE:
1281	max_poll_reqs = nreqs;	554	eio_set_max_poll_reqs (nreqs);
1282		555
1283	void	556	void
1284	max_poll_time (double nseconds)	557	max_poll_time (double nseconds)
1285	PROTOTYPE: $	558	PROTOTYPE: $
1286	CODE:	559	CODE:
1287	max_poll_time = nseconds * AIO_TICKS;	560	eio_set_max_poll_time (nseconds);
1288		561
1289	void	562	void
1290	min_parallel (int nthreads)	563	min_parallel (int nthreads)
1291	PROTOTYPE: $	564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
1292		567
1293	void	568	void
1294	max_parallel (int nthreads)	569	max_parallel (int nthreads)
1295	PROTOTYPE: $	570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
1296		573
1297	void	574	void
1298	max_idle (int nthreads)	575	max_idle (int nthreads)
1299	PROTOTYPE: $	576	PROTOTYPE: $
1300	CODE:	577	CODE:
1301	set_max_idle (nthreads);	578	eio_set_max_idle (nthreads);
1302		579
1303	int	580	void
1304	max_outstanding (int maxreqs)	581	max_outstanding (int maxreqs)
1305	PROTOTYPE: $	582	PROTOTYPE: $
1306	CODE:	583	CODE:
1307	RETVAL = max_outstanding;
1308	max_outstanding = maxreqs;	584	max_outstanding = maxreqs;
1309	OUTPUT:
1310	RETVAL
1311		585
1312	void	586	void
1313	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1314	SV * pathname
1315	int flags
1316	int mode
1317	SV * callback
1318	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
1319	PPCODE:	589	PPCODE:
1320	{	590	{
1321	dREQ;	591	dREQ;
1322		592
1323	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
1324	req->sv1 = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
1325	req->ptr1 = SvPVbyte_nolen (pathname);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->int1 = flags;	596	req->int1 = flags;
1327	req->mode = mode;	597	req->int2 = mode;
1328		598
1329	REQ_SEND;	599	REQ_SEND;
1330	}	600	}
1331		601
1332	void	602	void
1333	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1334	SV * fh
1335	SV * callback
1336	PROTOTYPE: $;$	604	PROTOTYPE: $;$
1337	ALIAS:	605	ALIAS:
1338	aio_close = REQ_CLOSE
1339	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
1340	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
1341	PPCODE:	608	PPCODE:
1342	{	609	{
		610	int fd = extract_fd (fh, 0);
1343	dREQ;	611	dREQ;
1344		612
1345	req->type = ix;	613	req->type = ix;
1346	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
1347	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
1348		616
1349	REQ_SEND (req);	617	REQ_SEND (req);
1350	}	618	}
1351		619
1352	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
1353	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1354	SV * fh
1355	UV offset
1356	UV length
1357	SV * data
1358	UV dataoffset
1359	SV * callback
1360	ALIAS:	669	ALIAS:
1361	aio_read = REQ_READ	670	aio_read = EIO_READ
1362	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
1363	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
1364	PPCODE:	673	PPCODE:
1365	{	674	{
1366	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
1367	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
1368		678	UV len = SvUV (length);
1369	SvUPGRADE (data, SVt_PV);
1370	SvPOK_on (data);
1371		679
1372	if (dataoffset < 0)	680	if (dataoffset < 0)
1373	dataoffset += svlen;	681	dataoffset += svlen;
1374		682
1375	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
1376	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
1377		685
1378	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
1379	{	687	{
1380	/* write: check length and adjust. */	688	/* write: check length and adjust. */
1381	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
1382	length = svlen - dataoffset;	690	len = svlen - dataoffset;
1383	}	691	}
1384	else	692	else
1385	{	693	{
1386	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
1387	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
1388	}	697	}
1389
1390	if (length < 0)
1391	croak ("length must not be negative");
1392		698
1393	{	699	{
1394	dREQ;	700	dREQ;
1395		701
1396	req->type = ix;	702	req->type = ix;
1397	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
1398	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
1399	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1400	req->offs = offset;
1401	req->size = length;	706	req->size = len;
1402	req->sv1 = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
1403	req->ptr1 = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
1404	req->stroffset = dataoffset;	709	req->stroffset = dataoffset;
1405		710
1406	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
1407	{	712	{
1408	SvREADONLY_on (data);	713	SvREADONLY_on (data);
1409	req->flags |= FLAG_SV1_RO_OFF;	714	req->flags |= FLAG_SV2_RO_OFF;
1410	}	715	}
1411		716
1412	REQ_SEND;	717	REQ_SEND;
1413	}	718	}
1414	}	719	}
1415		720
1416	void	721	void
1417	aio_readlink (path,callback=&PL_sv_undef)	722	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1418	SV * path
1419	SV * callback
1420	PROTOTYPE: $$;$	723	PROTOTYPE: $$;$
1421	PPCODE:	724	PPCODE:
1422	{	725	{
1423	SV *data;	726	SV *data;
1424	dREQ;	727	dREQ;
1425		728
1426	data = newSV (NAME_MAX);
1427	SvPOK_on (data);
1428
1429	req->type = REQ_READLINK;	729	req->type = EIO_READLINK;
1430	req->fh = newSVsv (path);	730	req->sv1 = newSVsv (path);
1431	req->ptr2 = SvPVbyte_nolen (path);
1432	req->sv1 = data;
1433	req->ptr1 = SvPVbyte_nolen (data);	731	req->ptr1 = SvPVbyte_nolen (req->sv1);
1434		732
1435	REQ_SEND;	733	REQ_SEND;
1436	}	734	}
1437		735
1438	void	736	void
1439	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	737	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1440	SV * out_fh
1441	SV * in_fh
1442	UV in_offset
1443	UV length
1444	SV * callback
1445	PROTOTYPE: $$$$;$	738	PROTOTYPE: $$$$;$
1446	PPCODE:	739	PPCODE:
1447	{	740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
1448	dREQ;	743	dREQ;
1449		744
1450	req->type = REQ_SENDFILE;	745	req->type = EIO_SENDFILE;
1451	req->fh = newSVsv (out_fh);	746	req->sv1 = newSVsv (out_fh);
1452	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	747	req->int1 = ofd;
1453	req->sv2 = newSVsv (in_fh);	748	req->sv2 = newSVsv (in_fh);
1454	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	749	req->int2 = ifd;
1455	req->offs = in_offset;	750	req->offs = SvVAL64 (in_offset);
1456	req->size = length;	751	req->size = length;
1457		752
1458	REQ_SEND;	753	REQ_SEND;
1459	}	754	}
1460		755
1461	void	756	void
1462	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1463	SV * fh
1464	UV offset
1465	IV length
1466	SV * callback
1467	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
1468	PPCODE:	759	PPCODE:
1469	{	760	{
		761	int fd = extract_fd (fh, 0);
1470	dREQ;	762	dREQ;
1471		763
1472	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
1473	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
1474	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
1475	req->offs = offset;	767	req->offs = SvVAL64 (offset);
1476	req->size = length;	768	req->size = length;
1477		769
1478	REQ_SEND;	770	REQ_SEND;
1479	}	771	}
1480		772
1481	void	773	void
1482	aio_stat (fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1483	SV * fh_or_path
1484	SV * callback
1485	ALIAS:	775	ALIAS:
1486	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
1487	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
1488	PPCODE:	778	PPCODE:
1489	{	779	{
1490	dREQ;	780	dREQ;
1491		781
1492	req->ptr2 = malloc (sizeof (Stat_t));	782	req->sv1 = newSVsv (fh_or_path);
1493	if (!req->ptr2)
1494	{
1495	req_free (req);
1496	croak ("out of memory during aio_req statdata allocation");
1497	}
1498		783
1499	req->flags |= FLAG_PTR2_FREE;	784	if (SvPOK (req->sv1))
1500
1501	if (SvPOK (fh_or_path))
1502	{	785	{
1503	req->type = ix;	786	req->type = ix;
1504	req->sv1 = newSVsv (fh_or_path);
1505	req->ptr1 = SvPVbyte_nolen (fh_or_path);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
1506	}	788	}
1507	else	789	else
1508	{	790	{
1509	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
1510	req->fh = newSVsv (fh_or_path);
1511	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	792	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1512	}	793	}
1513		794
1514	REQ_SEND;	795	REQ_SEND;
1515	}	796	}
1516		797
1517	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
1518	aio_unlink (pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1519	SV * pathname
1520	SV * callback
1521	ALIAS:	897	ALIAS:
1522	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
1523	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
1524	aio_readdir = REQ_READDIR	900	aio_readdir = EIO_READDIR
1525	PPCODE:	901	PPCODE:
1526	{	902	{
1527	dREQ;	903	dREQ;
1528		904
1529	req->type = ix;	905	req->type = ix;
1530	req->sv1 = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
1531	req->ptr1 = SvPVbyte_nolen (pathname);	907	req->ptr1 = SvPVbyte_nolen (req->sv1);
1532		908
1533	REQ_SEND;	909	REQ_SEND;
1534	}	910	}
1535		911
1536	void	912	void
1537	aio_link (oldpath,newpath,callback=&PL_sv_undef)	913	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1538	SV * oldpath
1539	SV * newpath
1540	SV * callback
1541	ALIAS:	914	ALIAS:
1542	aio_link = REQ_LINK	915	aio_link = EIO_LINK
1543	aio_symlink = REQ_SYMLINK	916	aio_symlink = EIO_SYMLINK
1544	aio_rename = REQ_RENAME	917	aio_rename = EIO_RENAME
1545	PPCODE:	918	PPCODE:
1546	{	919	{
1547	dREQ;	920	dREQ;
1548		921
1549	req->type = ix;	922	req->type = ix;
1550	req->fh = newSVsv (oldpath);	923	req->sv1 = newSVsv (oldpath);
1551	req->ptr2 = SvPVbyte_nolen (req->fh);	924	req->ptr1 = SvPVbyte_nolen (req->sv1);
1552	req->sv1 = newSVsv (newpath);	925	req->sv2 = newSVsv (newpath);
1553	req->ptr1 = SvPVbyte_nolen (newpath);	926	req->ptr2 = SvPVbyte_nolen (req->sv2);
1554		927
1555	REQ_SEND;	928	REQ_SEND;
1556	}	929	}
1557		930
1558	void	931	void
1559	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	932	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1560	SV * pathname
1561	SV * callback
1562	UV mode
1563	UV dev
1564	PPCODE:	933	PPCODE:
1565	{	934	{
1566	dREQ;	935	dREQ;
1567		936
1568	req->type = REQ_MKNOD;	937	req->type = EIO_MKNOD;
1569	req->sv1 = newSVsv (pathname);	938	req->sv1 = newSVsv (pathname);
1570	req->ptr1 = SvPVbyte_nolen (pathname);	939	req->ptr1 = SvPVbyte_nolen (req->sv1);
1571	req->mode = (mode_t)mode;	940	req->int2 = (mode_t)mode;
1572	req->offs = dev;	941	req->offs = dev;
1573		942
1574	REQ_SEND;	943	REQ_SEND;
1575	}	944	}
1576		945
1577	void	946	void
1578	aio_busy (delay,callback=&PL_sv_undef)	947	aio_busy (double delay, SV *callback=&PL_sv_undef)
1579	double delay
1580	SV * callback
1581	PPCODE:	948	PPCODE:
1582	{	949	{
1583	dREQ;	950	dREQ;
1584		951
1585	req->type = REQ_BUSY;	952	req->type = EIO_BUSY;
1586	req->int1 = delay < 0. ? 0 : delay;	953	req->nv1 = delay < 0. ? 0. : delay;
1587	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1588		954
1589	REQ_SEND;	955	REQ_SEND;
1590	}	956	}
1591		957
1592	void	958	void
1593	aio_group (callback=&PL_sv_undef)	959	aio_group (SV *callback=&PL_sv_undef)
1594	SV * callback
1595	PROTOTYPE: ;$	960	PROTOTYPE: ;$
1596	PPCODE:	961	PPCODE:
1597	{	962	{
1598	dREQ;	963	dREQ;
1599		964
1600	req->type = REQ_GROUP;	965	req->type = EIO_GROUP;
1601		966
1602	req_send (req);	967	req_submit (req);
1603	XPUSHs (req_sv (req, AIO_GRP_KLASS));	968	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1604	}	969	}
1605		970
1606	void	971	void
1607	aio_nop (callback=&PL_sv_undef)	972	aio_nop (SV *callback=&PL_sv_undef)
1608	SV * callback	973	ALIAS:
		974	aio_nop = EIO_NOP
		975	aio_sync = EIO_SYNC
1609	PPCODE:	976	PPCODE:
1610	{	977	{
1611	dREQ;	978	dREQ;
1612		979
1613	req->type = REQ_NOP;	980	req->type = ix;
1614		981
1615	REQ_SEND;	982	REQ_SEND;
1616	}	983	}
1617		984
1618	int	985	int
1619	aioreq_pri (int pri = 0)	986	aioreq_pri (int pri = 0)
1620	PROTOTYPE: ;$	987	PROTOTYPE: ;$
1621	CODE:	988	CODE:
1622	RETVAL = next_pri - PRI_BIAS;	989	RETVAL = next_pri;
1623	if (items > 0)	990	if (items > 0)
1624	{	991	{
1625	if (pri < PRI_MIN) pri = PRI_MIN;	992	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1626	if (pri > PRI_MAX) pri = PRI_MAX;	993	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1627	next_pri = pri + PRI_BIAS;	994	next_pri = pri;
1628	}	995	}
1629	OUTPUT:	996	OUTPUT:
1630	RETVAL	997	RETVAL
1631		998
1632	void	999	void
1633	aioreq_nice (int nice = 0)	1000	aioreq_nice (int nice = 0)
1634	CODE:	1001	CODE:
1635	nice = next_pri - nice;	1002	nice = next_pri - nice;
1636	if (nice < PRI_MIN) nice = PRI_MIN;	1003	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1637	if (nice > PRI_MAX) nice = PRI_MAX;	1004	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1638	next_pri = nice + PRI_BIAS;	1005	next_pri = nice;
1639		1006
1640	void	1007	void
1641	flush ()	1008	flush ()
1642	PROTOTYPE:	1009	PROTOTYPE:
1643	CODE:	1010	CODE:
1644	while (nreqs)	1011	while (eio_nreqs ())
1645	{	1012	{
1646	poll_wait ();	1013	poll_wait ();
1647	poll_cb (0);	1014	poll_cb ();
1648	}	1015	}
1649		1016
1650	void	1017	int
1651	poll()	1018	poll()
1652	PROTOTYPE:	1019	PROTOTYPE:
1653	CODE:	1020	CODE:
1654	if (nreqs)
1655	{
1656	poll_wait ();	1021	poll_wait ();
1657	poll_cb (0);	1022	RETVAL = poll_cb ();
1658	}	1023	OUTPUT:
		1024	RETVAL
1659		1025
1660	int	1026	int
1661	poll_fileno()	1027	poll_fileno()
1662	PROTOTYPE:	1028	PROTOTYPE:
1663	CODE:	1029	CODE:
…		…
1675		1041
1676	void	1042	void
1677	poll_wait()	1043	poll_wait()
1678	PROTOTYPE:	1044	PROTOTYPE:
1679	CODE:	1045	CODE:
1680	if (nreqs)
1681	poll_wait ();	1046	poll_wait ();
1682		1047
1683	int	1048	int
1684	nreqs()	1049	nreqs()
1685	PROTOTYPE:	1050	PROTOTYPE:
1686	CODE:	1051	CODE:
1687	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
1688	OUTPUT:	1053	OUTPUT:
1689	RETVAL	1054	RETVAL
1690		1055
1691	int	1056	int
1692	nready()	1057	nready()
1693	PROTOTYPE:	1058	PROTOTYPE:
1694	CODE:	1059	CODE:
1695	RETVAL = get_nready ();	1060	RETVAL = eio_nready ();
1696	OUTPUT:	1061	OUTPUT:
1697	RETVAL	1062	RETVAL
1698		1063
1699	int	1064	int
1700	npending()	1065	npending()
1701	PROTOTYPE:	1066	PROTOTYPE:
1702	CODE:	1067	CODE:
1703	RETVAL = get_npending ();	1068	RETVAL = eio_npending ();
1704	OUTPUT:	1069	OUTPUT:
1705	RETVAL	1070	RETVAL
1706		1071
1707	int	1072	int
1708	nthreads()	1073	nthreads()
1709	PROTOTYPE:	1074	PROTOTYPE:
1710	CODE:	1075	CODE:
1711	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1076	RETVAL = eio_nthreads ();
1712	RETVAL = started;
1713	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1714	OUTPUT:	1077	OUTPUT:
1715	RETVAL	1078	RETVAL
1716		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
1717	PROTOTYPES: DISABLE	1085	PROTOTYPES: DISABLE
1718		1086
1719	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1087	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1720		1088
1721	void	1089	void
1722	cancel (aio_req_ornot req)	1090	cancel (aio_req_ornot req)
1723	CODE:	1091	CODE:
1724	req_cancel (req);	1092	eio_cancel (req);
1725		1093
1726	void	1094	void
1727	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1095	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1728	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
1729	SvREFCNT_dec (req->callback);	1105	SvREFCNT_dec (req->callback);
1730	req->callback = newSVsv (callback);	1106	req->callback = SvREFCNT_inc (cb_cv);
		1107	}
		1108	}
1731		1109
1732	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1110	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1733		1111
1734	void	1112	void
1735	add (aio_req grp, ...)	1113	add (aio_req grp, ...)
1736	PPCODE:	1114	PPCODE:
1737	{	1115	{
1738	int i;	1116	int i;
1739	aio_req req;
1740		1117
1741	if (grp->int1 == 2)	1118	if (grp->int1 == 2)
1742	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");
1743		1120
1744	for (i = 1; i < items; ++i )	1121	for (i = 1; i < items; ++i )
1745	{	1122	{
		1123	aio_req req;
		1124
1746	if (GIMME_V != G_VOID)	1125	if (GIMME_V != G_VOID)
1747	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1126	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1748		1127
1749	req = SvAIO_REQ (ST (i));	1128	req = SvAIO_REQ (ST (i));
1750		1129
1751	if (req)	1130	if (req)
1752	{	1131	eio_grp_add (grp, req);
1753	++grp->size;
1754	req->grp = grp;
1755
1756	req->grp_prev = 0;
1757	req->grp_next = grp->grp_first;
1758
1759	if (grp->grp_first)
1760	grp->grp_first->grp_prev = req;
1761
1762	grp->grp_first = req;
1763	}
1764	}	1132	}
1765	}	1133	}
1766		1134
1767	void	1135	void
1768	cancel_subs (aio_req_ornot req)	1136	cancel_subs (aio_req_ornot req)
…		…
1793	grp->errorno = errorno;	1161	grp->errorno = errorno;
1794		1162
1795	void	1163	void
1796	limit (aio_req grp, int limit)	1164	limit (aio_req grp, int limit)
1797	CODE:	1165	CODE:
1798	grp->int2 = limit;	1166	eio_grp_limit (grp, limit);
1799	aio_grp_feed (grp);
1800		1167
1801	void	1168	void
1802	feed (aio_req grp, SV *callback=&PL_sv_undef)	1169	feed (aio_req grp, SV *callback=&PL_sv_undef)
1803	CODE:	1170	CODE:
1804	{	1171	{
1805	SvREFCNT_dec (grp->sv2);	1172	SvREFCNT_dec (grp->sv2);
1806	grp->sv2 = newSVsv (callback);	1173	grp->sv2 = newSVsv (callback);
		1174	grp->feed = aio_grp_feed;
1807		1175
1808	if (grp->int2 <= 0)	1176	if (grp->int2 <= 0)
1809	grp->int2 = 2;	1177	grp->int2 = 2;
1810		1178
1811	aio_grp_feed (grp);	1179	eio_grp_limit (grp, grp->int2);
1812	}	1180	}
1813		1181

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