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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.101 by root, Fri Jun 1 13:25:51 2007 UTC vs.
Revision 1.128 by root, Tue Sep 30 14:07:59 2008 UTC

1	#include "xthread.h"	1	#include "libeio/xthread.h"
2		2
3	#include <errno.h>	3	#include <errno.h>
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "autoconf/config.h"
10
11	#include <stddef.h>	9	#include <stddef.h>
12	#include <stdlib.h>	10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
		17
		18	/* perl namespace pollution */
		19	#undef VERSION
		20
		21	#ifdef _WIN32
		22
		23	# define EIO_STRUCT_DIRENT Direntry_t
		24	# undef malloc
		25	# undef free
		26
		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
		59	#else
		60
		61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
23	#include <utime.h>	64	# include <utime.h>
24
25	#if HAVE_SENDFILE
26	# if __linux
27	# include <sys/sendfile.h>
28	# elif __freebsd
29	# include <sys/socket.h>
30	# include <sys/uio.h>	65	# include <signal.h>
31	# elif __hpux	66	# define EIO_STRUCT_DIRENT struct dirent
32	# include <sys/socket.h>	67
33	# elif __solaris /* not yet */
34	# include <sys/sendfile.h>
35	# else
36	# error sendfile support requested but not available
37	# endif
38	#endif	68	#endif
39		69
40	/* number of seconds after which idle threads exit */	70	/* perl stupidly overrides readdir and maybe others */
41	#define IDLE_TIMEOUT 10	71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
42		75
43	/* used for struct dirent, AIX doesn't provide it */	76	#define EIO_STRUCT_STAT Stat_t
44	#ifndef NAME_MAX
45	# define NAME_MAX 4096
46	#endif
47
48	/* buffer size for various temporary buffers */
49	#define AIO_BUFSIZE 65536
50		77
51	/* use NV for 32 bit perls as it allows larger offsets */	78	/* use NV for 32 bit perls as it allows larger offsets */
52	#if IVSIZE >= 8	79	#if IVSIZE >= 8
53	# define SvVAL64 SvIV	80	# define SvVAL64 SvIV
54	#else	81	#else
55	# define SvVAL64 SvNV	82	# define SvVAL64 SvNV
56	#endif	83	#endif
57		84
58	#define dBUF \	85	/*****************************************************************************/
59	char *aio_buf; \
60	LOCK (wrklock); \
61	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
62	UNLOCK (wrklock); \
63	if (!aio_buf) \
64	return -1;
65		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
66	typedef SV SV8; /* byte-sv, used for argument-checking */	99	typedef SV SV8; /* byte-sv, used for argument-checking */
67
68	enum {
69	REQ_QUIT,
70	REQ_OPEN, REQ_CLOSE,
71	REQ_READ, REQ_WRITE,
72	REQ_READAHEAD, REQ_SENDFILE,
73	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
74	REQ_UTIME, REQ_FUTIME,
75	REQ_CHMOD, REQ_FCHMOD,
76	REQ_CHOWN, REQ_FCHOWN,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
79	REQ_MKNOD, REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};
84		100
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		103
88	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
89	{
90	struct aio_cb *volatile next;
91
92	SV *callback;	105	SV *callback; \
93	SV *sv1, *sv2;	106	SV *sv1, *sv2; \
94	void *ptr1, *ptr2;
95	off_t offs;
96	size_t size;
97	ssize_t result;
98	double nv1, nv2;
99
100	STRLEN stroffset;	107	STRLEN stroffset; \
101	int type;	108	SV *self;
102	int int1, int2, int3;
103	int errorno;
104	mode_t mode; /* open */
105		109
106	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
107	unsigned char pri;
108		111
109	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
111	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
112		120
113	enum {	121	enum {
114	FLAG_CANCELLED = 0x01, /* request was cancelled */
115	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */	122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
116	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
117	};	123	};
118		124
		125	#include "libeio/eio.c"
		126
119	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
120	typedef aio_cb *aio_req_ornot;	128	typedef eio_req *aio_req_ornot;
121		129
122	enum {	130	static SV *on_next_submit;
123	PRI_MIN = -4,	131	static int next_pri = EIO_PRI_DEFAULT;
124	PRI_MAX = 4,	132	static int max_outstanding;
125		133
126	DEFAULT_PRI = 0,	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
127	PRI_BIAS = -PRI_MIN,
128	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
129	};
130		135
131	#define AIO_TICKS ((1000000 + 1023) >> 10)
132
133	static unsigned int max_poll_time = 0;
134	static unsigned int max_poll_reqs = 0;
135
136	/* calculcate time difference in ~1/AIO_TICKS of a second */
137	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
138	{
139	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
140	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
141	}
142
143	static thread_t main_tid;
144	static int main_sig;
145	static int block_sig_level;
146
147	void block_sig ()
148	{
149	sigset_t ss;
150
151	if (block_sig_level++)
152	return;
153
154	if (!main_sig)
155	return;
156
157	sigemptyset (&ss);
158	sigaddset (&ss, main_sig);
159	pthread_sigmask (SIG_BLOCK, &ss, 0);
160	}
161
162	void unblock_sig ()
163	{
164	sigset_t ss;
165
166	if (--block_sig_level)
167	return;
168
169	if (!main_sig)
170	return;
171
172	sigemptyset (&ss);
173	sigaddset (&ss, main_sig);
174	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
175	}
176
177	static int next_pri = DEFAULT_PRI + PRI_BIAS;
178
179	static unsigned int started, idle, wanted;
180
181	/* worker threads management */
182	static mutex_t wrklock = MUTEX_INIT;
183
184	typedef struct worker {
185	/* locked by wrklock */
186	struct worker *prev, *next;
187
188	thread_t tid;
189
190	/* locked by reslock, reqlock or wrklock */
191	aio_req req; /* currently processed request */
192	void *dbuf;
193	DIR *dirp;
194	} worker;
195
196	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
197
198	static void worker_clear (worker *wrk)
199	{
200	if (wrk->dirp)
201	{
202	closedir (wrk->dirp);
203	wrk->dirp = 0;
204	}
205
206	if (wrk->dbuf)
207	{
208	free (wrk->dbuf);
209	wrk->dbuf = 0;
210	}
211	}
212
213	static void worker_free (worker *wrk)
214	{
215	wrk->next->prev = wrk->prev;
216	wrk->prev->next = wrk->next;
217
218	free (wrk);
219	}
220
221	static volatile unsigned int nreqs, nready, npending;
222	static volatile unsigned int max_idle = 4;
223	static volatile unsigned int max_outstanding = 0xffffffff;
224	static int respipe [2];
225
226	static mutex_t reslock = MUTEX_INIT;
227	static mutex_t reqlock = MUTEX_INIT;
228	static cond_t reqwait = COND_INIT;
229
230	#if WORDACCESS_UNSAFE
231
232	static unsigned int get_nready ()
233	{
234	unsigned int retval;
235
236	LOCK (reqlock);
237	retval = nready;
238	UNLOCK (reqlock);
239
240	return retval;
241	}
242
243	static unsigned int get_npending ()
244	{
245	unsigned int retval;
246
247	LOCK (reslock);
248	retval = npending;
249	UNLOCK (reslock);
250
251	return retval;
252	}
253
254	static unsigned int get_nthreads ()
255	{
256	unsigned int retval;
257
258	LOCK (wrklock);
259	retval = started;
260	UNLOCK (wrklock);
261
262	return retval;
263	}
264
265	#else
266
267	# define get_nready() nready
268	# define get_npending() npending
269	# define get_nthreads() started
270
271	#endif
272
273	/*
274	* a somewhat faster data structure might be nice, but
275	* with 8 priorities this actually needs <20 insns
276	* per shift, the most expensive operation.
277	*/
278	typedef struct {
279	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
280	int size;
281	} reqq;
282
283	static reqq req_queue;
284	static reqq res_queue;
285
286	int reqq_push (reqq *q, aio_req req)
287	{
288	int pri = req->pri;
289	req->next = 0;
290
291	if (q->qe[pri])
292	{
293	q->qe[pri]->next = req;
294	q->qe[pri] = req;
295	}
296	else
297	q->qe[pri] = q->qs[pri] = req;
298
299	return q->size++;
300	}
301
302	aio_req reqq_shift (reqq *q)
303	{
304	int pri;
305
306	if (!q->size)
307	return 0;
308
309	--q->size;
310
311	for (pri = NUM_PRI; pri--; )
312	{
313	aio_req req = q->qs[pri];
314
315	if (req)
316	{
317	if (!(q->qs[pri] = req->next))
318	q->qe[pri] = 0;
319
320	return req;
321	}
322	}
323
324	abort ();
325	}
326
327	static int poll_cb ();
328	static int req_invoke (aio_req req);
329	static void req_destroy (aio_req req);	136	static void req_destroy (aio_req req);
330	static void req_cancel (aio_req req);	137	static void req_cancel (aio_req req);
		138
		139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
331		152
332	/* must be called at most once */	153	/* must be called at most once */
333	static SV *req_sv (aio_req req, const char *klass)	154	static SV *req_sv (aio_req req, const char *klass)
334	{	155	{
335	if (!req->self)	156	if (!req->self)
…		…
353	return mg ? (aio_req)mg->mg_ptr : 0;	174	return mg ? (aio_req)mg->mg_ptr : 0;
354	}	175	}
355		176
356	static void aio_grp_feed (aio_req grp)	177	static void aio_grp_feed (aio_req grp)
357	{	178	{
358	block_sig ();	179	if (grp->sv2 && SvOK (grp->sv2))
359
360	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
361	{	180	{
362	int old_len = grp->size;
363
364	if (grp->sv2 && SvOK (grp->sv2))
365	{
366	dSP;	181	dSP;
367		182
368	ENTER;	183	ENTER;
369	SAVETMPS;	184	SAVETMPS;
370	PUSHMARK (SP);	185	PUSHMARK (SP);
371	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
372	PUTBACK;	187	PUTBACK;
373	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
374	SPAGAIN;	189	SPAGAIN;
375	FREETMPS;	190	FREETMPS;
376	LEAVE;	191	LEAVE;
377	}
378
379	/* stop if no progress has been made */
380	if (old_len == grp->size)
381	{
382	SvREFCNT_dec (grp->sv2);
383	grp->sv2 = 0;
384	break;
385	}
386	}	192	}
387
388	unblock_sig ();
389	}	193	}
390		194
391	static void aio_grp_dec (aio_req grp)	195	static void req_submit (eio_req *req)
392	{	196	{
393	--grp->size;	197	eio_submit (req);
394		198
395	/* call feeder, if applicable */	199	if (expect_false (on_next_submit))
396	aio_grp_feed (grp);
397
398	/* finish, if done */
399	if (!grp->size && grp->int1)
400	{	200	{
401	block_sig ();	201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
402		203
403	if (!req_invoke (grp))	204	on_next_submit = 0;
404	{
405	req_destroy (grp);
406	unblock_sig ();
407	croak (0);
408	}
409		205
410	req_destroy (grp);	206	PUSHMARK (SP);
411	unblock_sig ();	207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
412	}	209	}
413	}	210	}
414		211
415	static int req_invoke (aio_req req)	212	static int req_invoke (eio_req *req)
416	{	213	{
417	dSP;	214	dSP;
418		215
419	if (req->flags & FLAG_SV2_RO_OFF)	216	if (req->flags & FLAG_SV2_RO_OFF)
420	SvREADONLY_off (req->sv2);	217	SvREADONLY_off (req->sv2);
421		218
422	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	219	if (!EIO_CANCELLED (req) && req->callback)
423	{	220	{
424	ENTER;	221	ENTER;
425	SAVETMPS;	222	SAVETMPS;
426	PUSHMARK (SP);	223	PUSHMARK (SP);
427	EXTEND (SP, 1);	224	EXTEND (SP, 1);
428		225
429	switch (req->type)	226	switch (req->type)
430	{	227	{
431	case REQ_READDIR:	228	case EIO_READDIR:
432	{	229	{
433	SV *rv = &PL_sv_undef;	230	SV *rv = &PL_sv_undef;
434		231
435	if (req->result >= 0)	232	if (req->result >= 0)
436	{	233	{
…		…
453		250
454	PUSHs (rv);	251	PUSHs (rv);
455	}	252	}
456	break;	253	break;
457		254
458	case REQ_OPEN:	255	case EIO_OPEN:
459	{	256	{
460	/* convert fd to fh */	257	/* convert fd to fh */
461	SV *fh;	258	SV *fh = &PL_sv_undef;
462		259
463	PUSHs (sv_2mortal (newSViv (req->result)));	260	if (req->result >= 0)
464	PUTBACK;	261	{
465	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	262	GV *gv = (GV *)sv_newmortal ();
466	SPAGAIN;	263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
467		269
468	fh = POPs;	270	symlen = snprintf (
469	PUSHMARK (SP);	271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
470	XPUSHs (fh);	282	PUSHs (fh);
471	}	283	}
472	break;	284	break;
473		285
474	case REQ_GROUP:	286	case EIO_GROUP:
475	req->int1 = 2; /* mark group as finished */	287	req->int1 = 2; /* mark group as finished */
476		288
477	if (req->sv1)	289	if (req->sv1)
478	{	290	{
479	int i;	291	int i;
…		…
483	for (i = 0; i <= AvFILL (av); ++i)	295	for (i = 0; i <= AvFILL (av); ++i)
484	PUSHs (*av_fetch (av, i, 0));	296	PUSHs (*av_fetch (av, i, 0));
485	}	297	}
486	break;	298	break;
487		299
488	case REQ_NOP:	300	case EIO_NOP:
489	case REQ_BUSY:	301	case EIO_BUSY:
490	break;	302	break;
491		303
492	case REQ_READLINK:	304	case EIO_READLINK:
493	if (req->result > 0)	305	if (req->result > 0)
494	{	306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
495	SvCUR_set (req->sv2, req->result);
496	*SvEND (req->sv2) = 0;
497	PUSHs (req->sv2);
498	}
499	break;	307	break;
500		308
501	case REQ_STAT:	309	case EIO_STAT:
502	case REQ_LSTAT:	310	case EIO_LSTAT:
503	case REQ_FSTAT:	311	case EIO_FSTAT:
504	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
505	PL_laststatval = req->result;	313	PL_laststatval = req->result;
506	PL_statcache = *(Stat_t *)(req->ptr2);	314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
507	PUSHs (sv_2mortal (newSViv (req->result)));	315	PUSHs (sv_2mortal (newSViv (req->result)));
508	break;	316	break;
509		317
510	case REQ_READ:	318	case EIO_READ:
511	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));	319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
512	*SvEND (req->sv2) = 0;	320	*SvEND (req->sv2) = 0;
513	PUSHs (sv_2mortal (newSViv (req->result)));	321	PUSHs (sv_2mortal (newSViv (req->result)));
514	break;	322	break;
515		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
		328
516	default:	329	default:
517	PUSHs (sv_2mortal (newSViv (req->result)));	330	PUSHs (sv_2mortal (newSViv (req->result)));
518	break;	331	break;
519	}	332	}
520		333
521	errno = req->errorno;	334	errno = req->errorno;
522		335
523	PUTBACK;	336	PUTBACK;
524	call_sv (req->callback, G_VOID | G_EVAL);	337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
525	SPAGAIN;	338	SPAGAIN;
526		339
527	FREETMPS;	340	FREETMPS;
528	LEAVE;	341	LEAVE;
		342
		343	PUTBACK;
529	}	344	}
530		345
531	if (req->grp)
532	{
533	aio_req grp = req->grp;
534
535	/* unlink request */
536	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
537	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
538
539	if (grp->grp_first == req)
540	grp->grp_first = req->grp_next;
541
542	aio_grp_dec (grp);
543	}
544
545	return !SvTRUE (ERRSV);	346	return !!SvTRUE (ERRSV);
546	}	347	}
547		348
548	static void req_destroy (aio_req req)	349	static void req_destroy (aio_req req)
549	{	350	{
550	if (req->self)	351	if (req->self)
…		…
555		356
556	SvREFCNT_dec (req->sv1);	357	SvREFCNT_dec (req->sv1);
557	SvREFCNT_dec (req->sv2);	358	SvREFCNT_dec (req->sv2);
558	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
559		360
560	if (req->flags & FLAG_PTR2_FREE)
561	free (req->ptr2);
562
563	Safefree (req);	361	Safefree (req);
564	}	362	}
565		363
566	static void req_cancel_subs (aio_req grp)	364	static void req_cancel_subs (aio_req grp)
567	{	365	{
568	aio_req sub;	366	aio_req sub;
569		367
570	if (grp->type != REQ_GROUP)	368	if (grp->type != EIO_GROUP)
571	return;	369	return;
572		370
573	SvREFCNT_dec (grp->sv2);	371	SvREFCNT_dec (grp->sv2);
574	grp->sv2 = 0;	372	grp->sv2 = 0;
575		373
576	for (sub = grp->grp_first; sub; sub = sub->grp_next)	374	eio_grp_cancel (grp);
577	req_cancel (sub);
578	}	375	}
579		376
580	static void req_cancel (aio_req req)	377	#ifdef USE_SOCKETS_AS_HANDLES
581	{	378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
582	req->flags |= FLAG_CANCELLED;	379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
583		382
584	req_cancel_subs (req);	383	static void
585	}	384	create_respipe (void)
586
587	static void *aio_proc (void *arg);
588
589	static void start_thread (void)
590	{	385	{
591	worker *wrk = calloc (1, sizeof (worker));	386	int old_readfd = respipe [0];
592		387
593	if (!wrk)	388	if (respipe [1] >= 0)
594	croak ("unable to allocate worker thread data");	389	respipe_close (TO_SOCKET (respipe [1]));
595		390
596	LOCK (wrklock);	391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
597		397
598	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))	398	if (old_readfd >= 0)
599	{	399	{
600	wrk->prev = &wrk_first;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
601	wrk->next = wrk_first.next;	401	croak ("unable to initialize result pipe(2)");
602	wrk_first.next->prev = wrk;	402
603	wrk_first.next = wrk;	403	respipe_close (respipe [0]);
604	++started;	404	respipe [0] = old_readfd;
605	}	405	}
606	else
607	free (wrk);
608		406
609	UNLOCK (wrklock);	407	#ifdef _WIN32
610	}	408	int arg = 1;
		409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
611		416
612	static void maybe_start_thread ()	417	respipe_osf [0] = TO_SOCKET (respipe [0]);
613	{	418	respipe_osf [1] = TO_SOCKET (respipe [1]);
614	if (get_nthreads () >= wanted)
615	return;
616
617	/* todo: maybe use idle here, but might be less exact */
618	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
619	return;
620
621	start_thread ();
622	}	419	}
623		420
624	static void req_send (aio_req req)
625	{
626	block_sig ();
627
628	++nreqs;
629
630	LOCK (reqlock);
631	++nready;
632	reqq_push (&req_queue, req);
633	COND_SIGNAL (reqwait);
634	UNLOCK (reqlock);
635
636	unblock_sig ();
637
638	maybe_start_thread ();
639	}
640
641	static void end_thread (void)
642	{
643	aio_req req;
644
645	Newz (0, req, 1, aio_cb);
646
647	req->type = REQ_QUIT;
648	req->pri = PRI_MAX + PRI_BIAS;
649
650	LOCK (reqlock);
651	reqq_push (&req_queue, req);
652	COND_SIGNAL (reqwait);
653	UNLOCK (reqlock);
654
655	LOCK (wrklock);
656	--started;
657	UNLOCK (wrklock);
658	}
659
660	static void set_max_idle (int nthreads)
661	{
662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
663	max_idle = nthreads <= 0 ? 1 : nthreads;
664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
665	}
666
667	static void min_parallel (int nthreads)
668	{
669	if (wanted < nthreads)
670	wanted = nthreads;
671	}
672
673	static void max_parallel (int nthreads)
674	{
675	if (wanted > nthreads)
676	wanted = nthreads;
677
678	while (started > wanted)
679	end_thread ();
680	}
681
682	static void poll_wait ()	421	static void poll_wait (void)
683	{	422	{
684	fd_set rfd;	423	fd_set rfd;
685		424
686	while (nreqs)	425	while (eio_nreqs ())
687	{	426	{
688	int size;	427	int size;
689	if (WORDACCESS_UNSAFE) LOCK (reslock);	428
		429	X_LOCK (reslock);
690	size = res_queue.size;	430	size = res_queue.size;
691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	431	X_UNLOCK (reslock);
692		432
693	if (size)	433	if (size)
694	return;	434	return;
695		435
696	maybe_start_thread ();	436	etp_maybe_start_thread ();
697		437
698	FD_ZERO(&rfd);	438	FD_ZERO (&rfd);
699	FD_SET(respipe [0], &rfd);	439	FD_SET (respipe [0], &rfd);
700		440
701	select (respipe [0] + 1, &rfd, 0, 0, 0);	441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
702	}	442	}
703	}	443	}
704		444
705	static int poll_cb ()	445	static int poll_cb (void)
706	{	446	{
707	dSP;
708	int count = 0;
709	int maxreqs = max_poll_reqs;
710	int do_croak = 0;
711	struct timeval tv_start, tv_now;
712	aio_req req;
713
714	if (max_poll_time)
715	gettimeofday (&tv_start, 0);
716
717	block_sig ();
718
719	for (;;)	447	for (;;)
720	{	448	{
721	for (;;)	449	int res = eio_poll ();
722	{
723	maybe_start_thread ();
724		450
725	LOCK (reslock);	451	if (res > 0)
726	req = reqq_shift (&res_queue);
727
728	if (req)
729	{
730	--npending;
731
732	if (!res_queue.size)
733	{
734	/* read any signals sent by the worker threads */
735	char buf [4];
736	while (read (respipe [0], buf, 4) == 4)
737	;
738	}
739	}
740
741	UNLOCK (reslock);
742
743	if (!req)
744	break;
745
746	--nreqs;
747
748	if (req->type == REQ_GROUP && req->size)
749	{
750	req->int1 = 1; /* mark request as delayed */
751	continue;
752	}
753	else
754	{
755	if (!req_invoke (req))
756	{
757	req_destroy (req);
758	unblock_sig ();
759	croak (0);	452	croak (0);
760	}
761		453
762	count++;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
763	}	455	return res;
764
765	req_destroy (req);
766
767	if (maxreqs && !--maxreqs)
768	break;
769
770	if (max_poll_time)
771	{
772	gettimeofday (&tv_now, 0);
773
774	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
775	break;
776	}
777	}
778
779	if (nreqs <= max_outstanding)
780	break;
781		456
782	poll_wait ();	457	poll_wait ();
783
784	++maxreqs;
785	}	458	}
786
787	unblock_sig ();
788	return count;
789	}	459	}
790		460
791	static void create_pipe ()	461	static void atfork_child (void)
792	{	462	{
793	if (pipe (respipe))	463	create_respipe ();
794	croak ("unable to initialize result pipe");
795
796	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
797	croak ("cannot set result pipe to nonblocking mode");
798
799	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
800	croak ("cannot set result pipe to nonblocking mode");
801	}	464	}
802		465
803	/*****************************************************************************/	466	static SV *
804	/* work around various missing functions */	467	get_cb (SV *cb_sv)
805
806	#if !HAVE_PREADWRITE
807	# define pread aio_pread
808	# define pwrite aio_pwrite
809
810	/*
811	* make our pread/pwrite safe against themselves, but not against
812	* normal read/write by using a mutex. slows down execution a lot,
813	* but that's your problem, not mine.
814	*/
815	static mutex_t preadwritelock = MUTEX_INIT;
816
817	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
818	{	468	{
819	ssize_t res;	469	HV *st;
820	off_t ooffset;	470	GV *gvp;
		471	CV *cv;
821		472
822	LOCK (preadwritelock);	473	if (!SvOK (cb_sv))
823	ooffset = lseek (fd, 0, SEEK_CUR);
824	lseek (fd, offset, SEEK_SET);
825	res = read (fd, buf, count);
826	lseek (fd, ooffset, SEEK_SET);
827	UNLOCK (preadwritelock);
828
829	return res;
830	}
831
832	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
833	{
834	ssize_t res;
835	off_t ooffset;
836
837	LOCK (preadwritelock);
838	ooffset = lseek (fd, 0, SEEK_CUR);
839	lseek (fd, offset, SEEK_SET);
840	res = write (fd, buf, count);
841	lseek (fd, offset, SEEK_SET);
842	UNLOCK (preadwritelock);
843
844	return res;
845	}
846	#endif
847
848	#ifndef HAVE_FUTIMES
849
850	# define utimes(path,times) aio_utimes (path, times)
851	# define futimes(fd,times) aio_futimes (fd, times)
852
853	int aio_utimes (const char *filename, const struct timeval times[2])
854	{
855	if (times)
856	{
857	struct utimbuf buf;
858
859	buf.actime = times[0].tv_sec;
860	buf.modtime = times[1].tv_sec;
861
862	return utime (filename, &buf);
863	}
864	else
865	return utime (filename, 0);
866	}
867
868	int aio_futimes (int fd, const struct timeval tv[2])
869	{
870	errno = ENOSYS;
871	return -1;
872	}
873
874	#endif
875
876	#if !HAVE_FDATASYNC
877	# define fdatasync fsync
878	#endif
879
880	#if !HAVE_READAHEAD
881	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
882
883	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
884	{
885	dBUF;
886
887	while (count > 0)
888	{
889	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
890
891	pread (fd, aio_buf, len, offset);
892	offset += len;
893	count -= len;
894	}
895
896	errno = 0;
897	}
898
899	#endif
900
901	#if !HAVE_READDIR_R
902	# define readdir_r aio_readdir_r
903
904	static mutex_t readdirlock = MUTEX_INIT;
905
906	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
907	{
908	struct dirent *e;
909	int errorno;
910
911	LOCK (readdirlock);
912
913	e = readdir (dirp);
914	errorno = errno;
915
916	if (e)
917	{
918	*res = ent;
919	strcpy (ent->d_name, e->d_name);
920	}
921	else
922	*res = 0;
923
924	UNLOCK (readdirlock);
925
926	errno = errorno;
927	return e ? 0 : -1;
928	}
929	#endif
930
931	/* sendfile always needs emulation */
932	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
933	{
934	ssize_t res;
935
936	if (!count)
937	return 0;	474	return 0;
938		475
939	#if HAVE_SENDFILE	476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
940	# if __linux
941	res = sendfile (ofd, ifd, &offset, count);
942		477
943	# elif __freebsd	478	if (!cv)
944	/*	479	croak ("IO::AIO watcher callback must be undef or a CODE reference");
945	* Of course, the freebsd sendfile is a dire hack with no thoughts
946	* wasted on making it similar to other I/O functions.
947	*/
948	{
949	off_t sbytes;
950	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
951		480
952	if (res < 0 && sbytes)	481	return (SV *)cv;
953	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
954	res = sbytes;
955	}
956
957	# elif __hpux
958	res = sendfile (ofd, ifd, offset, count, 0, 0);
959
960	# elif __solaris
961	{
962	struct sendfilevec vec;
963	size_t sbytes;
964
965	vec.sfv_fd = ifd;
966	vec.sfv_flag = 0;
967	vec.sfv_off = offset;
968	vec.sfv_len = count;
969
970	res = sendfilev (ofd, &vec, 1, &sbytes);
971
972	if (res < 0 && sbytes)
973	res = sbytes;
974	}
975
976	# endif
977	#else
978	res = -1;
979	errno = ENOSYS;
980	#endif
981
982	if (res < 0
983	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
984	#if __solaris
985	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
986	#endif
987	)
988	)
989	{
990	/* emulate sendfile. this is a major pain in the ass */
991	dBUF;
992
993	res = 0;
994
995	while (count)
996	{
997	ssize_t cnt;
998
999	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
1000
1001	if (cnt <= 0)
1002	{
1003	if (cnt && !res) res = -1;
1004	break;
1005	}
1006
1007	cnt = write (ofd, aio_buf, cnt);
1008
1009	if (cnt <= 0)
1010	{
1011	if (cnt && !res) res = -1;
1012	break;
1013	}
1014
1015	offset += cnt;
1016	res += cnt;
1017	count -= cnt;
1018	}
1019	}
1020
1021	return res;
1022	}
1023
1024	/* read a full directory */
1025	static void scandir_ (aio_req req, worker *self)
1026	{
1027	DIR *dirp;
1028	union
1029	{
1030	struct dirent d;
1031	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
1032	} *u;
1033	struct dirent *entp;
1034	char *name, *names;
1035	int memlen = 4096;
1036	int memofs = 0;
1037	int res = 0;
1038	int errorno;
1039
1040	LOCK (wrklock);
1041	self->dirp = dirp = opendir (req->ptr1);
1042	self->dbuf = u = malloc (sizeof (*u));
1043	req->flags |= FLAG_PTR2_FREE;
1044	req->ptr2 = names = malloc (memlen);
1045	UNLOCK (wrklock);
1046
1047	if (dirp && u && names)
1048	for (;;)
1049	{
1050	errno = 0;
1051	readdir_r (dirp, &u->d, &entp);
1052
1053	if (!entp)
1054	break;
1055
1056	name = entp->d_name;
1057
1058	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1059	{
1060	int len = strlen (name) + 1;
1061
1062	res++;
1063
1064	while (memofs + len > memlen)
1065	{
1066	memlen *= 2;
1067	LOCK (wrklock);
1068	req->ptr2 = names = realloc (names, memlen);
1069	UNLOCK (wrklock);
1070
1071	if (!names)
1072	break;
1073	}
1074
1075	memcpy (names + memofs, name, len);
1076	memofs += len;
1077	}
1078	}
1079
1080	if (errno)
1081	res = -1;
1082
1083	req->result = res;
1084	}
1085
1086	/*****************************************************************************/
1087
1088	static void *aio_proc (void *thr_arg)
1089	{
1090	aio_req req;
1091	struct timespec ts;
1092	worker *self = (worker *)thr_arg;
1093
1094	/* try to distribute timeouts somewhat evenly */
1095	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1096	* (1000000000UL / 1024UL);
1097
1098	for (;;)
1099	{
1100	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1101
1102	LOCK (reqlock);
1103
1104	for (;;)
1105	{
1106	self->req = req = reqq_shift (&req_queue);
1107
1108	if (req)
1109	break;
1110
1111	++idle;
1112
1113	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1114	== ETIMEDOUT)
1115	{
1116	if (idle > max_idle)
1117	{
1118	--idle;
1119	UNLOCK (reqlock);
1120	LOCK (wrklock);
1121	--started;
1122	UNLOCK (wrklock);
1123	goto quit;
1124	}
1125
1126	/* we are allowed to idle, so do so without any timeout */
1127	COND_WAIT (reqwait, reqlock);
1128	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1129	}
1130
1131	--idle;
1132	}
1133
1134	--nready;
1135
1136	UNLOCK (reqlock);
1137
1138	errno = 0; /* strictly unnecessary */
1139
1140	if (!(req->flags & FLAG_CANCELLED))
1141	switch (req->type)
1142	{
1143	case REQ_READ: req->result = req->offs >= 0
1144	? pread (req->int1, req->ptr1, req->size, req->offs)
1145	: read (req->int1, req->ptr1, req->size); break;
1146	case REQ_WRITE: req->result = req->offs >= 0
1147	? pwrite (req->int1, req->ptr1, req->size, req->offs)
1148	: write (req->int1, req->ptr1, req->size); break;
1149
1150	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1151	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1152
1153	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1154	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1155	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1156
1157	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1158	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1159	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
1160	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
1161
1162	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1163	case REQ_CLOSE: req->result = close (req->int1); break;
1164	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1165	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1166	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1167	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1168	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1169	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1170	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1171	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1172
1173	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1174	case REQ_FSYNC: req->result = fsync (req->int1); break;
1175	case REQ_READDIR: scandir_ (req, self); break;
1176
1177	case REQ_BUSY:
1178	{
1179	struct timeval tv;
1180
1181	tv.tv_sec = req->nv1;
1182	tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
1183
1184	req->result = select (0, 0, 0, 0, &tv);
1185	}
1186
1187	case REQ_UTIME:
1188	case REQ_FUTIME:
1189	{
1190	struct timeval tv[2];
1191	struct timeval *times;
1192
1193	if (req->nv1 != -1. || req->nv2 != -1.)
1194	{
1195	tv[0].tv_sec = req->nv1;
1196	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
1197	tv[1].tv_sec = req->nv2;
1198	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
1199
1200	times = tv;
1201	}
1202	else
1203	times = 0;
1204
1205
1206	req->result = req->type == REQ_FUTIME
1207	? futimes (req->int1, times)
1208	: utimes (req->ptr1, times);
1209	}
1210
1211	case REQ_GROUP:
1212	case REQ_NOP:
1213	break;
1214
1215	case REQ_QUIT:
1216	goto quit;
1217
1218	default:
1219	req->result = -1;
1220	break;
1221	}
1222
1223	req->errorno = errno;
1224
1225	LOCK (reslock);
1226
1227	++npending;
1228
1229	if (!reqq_push (&res_queue, req))
1230	{
1231	/* write a dummy byte to the pipe so fh becomes ready */
1232	write (respipe [1], &respipe, 1);
1233
1234	/* optionally signal the main thread asynchronously */
1235	if (main_sig)
1236	pthread_kill (main_tid, main_sig);
1237	}
1238
1239	self->req = 0;
1240	worker_clear (self);
1241
1242	UNLOCK (reslock);
1243	}
1244
1245	quit:
1246	LOCK (wrklock);
1247	worker_free (self);
1248	UNLOCK (wrklock);
1249
1250	return 0;
1251	}
1252
1253	/*****************************************************************************/
1254
1255	static void atfork_prepare (void)
1256	{
1257	LOCK (wrklock);
1258	LOCK (reqlock);
1259	LOCK (reslock);
1260	#if !HAVE_PREADWRITE
1261	LOCK (preadwritelock);
1262	#endif
1263	#if !HAVE_READDIR_R
1264	LOCK (readdirlock);
1265	#endif
1266	}
1267
1268	static void atfork_parent (void)
1269	{
1270	#if !HAVE_READDIR_R
1271	UNLOCK (readdirlock);
1272	#endif
1273	#if !HAVE_PREADWRITE
1274	UNLOCK (preadwritelock);
1275	#endif
1276	UNLOCK (reslock);
1277	UNLOCK (reqlock);
1278	UNLOCK (wrklock);
1279	}
1280
1281	static void atfork_child (void)
1282	{
1283	aio_req prv;
1284
1285	while (prv = reqq_shift (&req_queue))
1286	req_destroy (prv);
1287
1288	while (prv = reqq_shift (&res_queue))
1289	req_destroy (prv);
1290
1291	while (wrk_first.next != &wrk_first)
1292	{
1293	worker *wrk = wrk_first.next;
1294
1295	if (wrk->req)
1296	req_destroy (wrk->req);
1297
1298	worker_clear (wrk);
1299	worker_free (wrk);
1300	}
1301
1302	started = 0;
1303	idle = 0;
1304	nreqs = 0;
1305	nready = 0;
1306	npending = 0;
1307
1308	close (respipe [0]);
1309	close (respipe [1]);
1310	create_pipe ();
1311
1312	atfork_parent ();
1313	}	482	}
1314		483
1315	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
1316	aio_req req; \	486	aio_req req; \
1317	int req_pri = next_pri; \	487	int req_pri = next_pri; \
1318	next_pri = DEFAULT_PRI + PRI_BIAS; \	488	next_pri = EIO_PRI_DEFAULT; \
1319	\	489	\
1320	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
1321	croak ("callback must be undef or of reference type"); \
1322	\	491	\
1323	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
1324	if (!req) \	493	if (!req) \
1325	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
1326	\	495	\
1327	req->callback = newSVsv (callback); \	496	req->callback = SvREFCNT_inc (cb_cv); \
1328	req->pri = req_pri	497	req->pri = req_pri
1329		498
1330	#define REQ_SEND \	499	#define REQ_SEND \
		500	PUTBACK; \
1331	req_send (req); \	501	req_submit (req); \
		502	SPAGAIN; \
1332	\	503	\
1333	if (GIMME_V != G_VOID) \	504	if (GIMME_V != G_VOID) \
1334	XPUSHs (req_sv (req, AIO_REQ_KLASS));	505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1335		506
1336	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
1337		508
1338	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
1339		510
1340	BOOT:	511	BOOT:
1341	{	512	{
1342	HV *stash = gv_stashpv ("IO::AIO", 1);	513	stash = gv_stashpv ("IO::AIO", 1);
1343		514
1344	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1345	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1346	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1347	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1348	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
1349	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1350	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));	522	#endif
1351		523
1352	create_pipe ();	524	create_respipe ();
1353	ATFORK (atfork_prepare, atfork_parent, atfork_child);	525
		526	if (eio_init (want_poll, done_poll) < 0)
		527	croak ("IO::AIO: unable to initialise eio library");
		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
1354	}	531	}
1355		532
1356	void	533	void
1357	max_poll_reqs (int nreqs)	534	max_poll_reqs (int nreqs)
1358	PROTOTYPE: $	535	PROTOTYPE: $
1359	CODE:	536	CODE:
1360	max_poll_reqs = nreqs;	537	eio_set_max_poll_reqs (nreqs);
1361		538
1362	void	539	void
1363	max_poll_time (double nseconds)	540	max_poll_time (double nseconds)
1364	PROTOTYPE: $	541	PROTOTYPE: $
1365	CODE:	542	CODE:
1366	max_poll_time = nseconds * AIO_TICKS;	543	eio_set_max_poll_time (nseconds);
1367		544
1368	void	545	void
1369	min_parallel (int nthreads)	546	min_parallel (int nthreads)
1370	PROTOTYPE: $	547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
1371		550
1372	void	551	void
1373	max_parallel (int nthreads)	552	max_parallel (int nthreads)
1374	PROTOTYPE: $	553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
1375		556
1376	void	557	void
1377	max_idle (int nthreads)	558	max_idle (int nthreads)
1378	PROTOTYPE: $	559	PROTOTYPE: $
1379	CODE:	560	CODE:
1380	set_max_idle (nthreads);	561	eio_set_max_idle (nthreads);
1381		562
1382	int	563	void
1383	max_outstanding (int maxreqs)	564	max_outstanding (int maxreqs)
1384	PROTOTYPE: $	565	PROTOTYPE: $
1385	CODE:	566	CODE:
1386	RETVAL = max_outstanding;
1387	max_outstanding = maxreqs;	567	max_outstanding = maxreqs;
1388	OUTPUT:
1389	RETVAL
1390		568
1391	void	569	void
1392	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)	570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1393	PROTOTYPE: $$$;$	571	PROTOTYPE: $$$;$
1394	PPCODE:	572	PPCODE:
1395	{	573	{
1396	dREQ;	574	dREQ;
1397		575
1398	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
1399	req->sv1 = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
1400	req->ptr1 = SvPVbyte_nolen (req->sv1);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
1401	req->int1 = flags;	579	req->int1 = flags;
1402	req->mode = mode;	580	req->int2 = mode;
1403		581
1404	REQ_SEND;	582	REQ_SEND;
1405	}	583	}
1406		584
1407	void	585	void
1408	aio_close (SV *fh, SV *callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1409	PROTOTYPE: $;$	587	PROTOTYPE: $;$
1410	ALIAS:	588	ALIAS:
1411	aio_close = REQ_CLOSE
1412	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
1413	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
1414	PPCODE:	591	PPCODE:
1415	{	592	{
1416	dREQ;	593	dREQ;
1417		594
1418	req->type = ix;	595	req->type = ix;
…		…
1421		598
1422	REQ_SEND (req);	599	REQ_SEND (req);
1423	}	600	}
1424		601
1425	void	602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
1426	aio_read (SV *fh, SV *offset, UV length, SV8 *data, UV dataoffset, SV *callback=&PL_sv_undef)	631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1427	ALIAS:	632	ALIAS:
1428	aio_read = REQ_READ	633	aio_read = EIO_READ
1429	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
1430	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
1431	PPCODE:	636	PPCODE:
1432	{	637	{
1433	STRLEN svlen;	638	STRLEN svlen;
1434	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
1435		641
1436	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
1437	SvPOK_on (data);	643	SvPOK_on (data);
1438		644
1439	if (dataoffset < 0)	645	if (dataoffset < 0)
1440	dataoffset += svlen;	646	dataoffset += svlen;
1441		647
1442	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
1443	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
1444		650
1445	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
1446	{	652	{
1447	/* write: check length and adjust. */	653	/* write: check length and adjust. */
1448	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
1449	length = svlen - dataoffset;	655	len = svlen - dataoffset;
1450	}	656	}
1451	else	657	else
1452	{	658	{
1453	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
1454	svptr = SvGROW (data, length + dataoffset + 1);	660	svptr = SvGROW (data, len + dataoffset + 1);
1455	}	661	}
1456		662
1457	if (length < 0)	663	if (len < 0)
1458	croak ("length must not be negative");	664	croak ("length must not be negative");
1459		665
1460	{	666	{
1461	dREQ;	667	dREQ;
1462		668
1463	req->type = ix;	669	req->type = ix;
1464	req->sv1 = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
1465	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1466	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
1467	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;	673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1468	req->size = length;	674	req->size = len;
1469	req->sv2 = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc (data);
1470	req->ptr1 = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
1471	req->stroffset = dataoffset;	677	req->stroffset = dataoffset;
1472		678
1473	if (!SvREADONLY (data))	679	if (!SvREADONLY (data))
1474	{	680	{
1475	SvREADONLY_on (data);	681	SvREADONLY_on (data);
…		…
1486	PPCODE:	692	PPCODE:
1487	{	693	{
1488	SV *data;	694	SV *data;
1489	dREQ;	695	dREQ;
1490		696
1491	data = newSV (NAME_MAX);
1492	SvPOK_on (data);
1493
1494	req->type = REQ_READLINK;	697	req->type = EIO_READLINK;
1495	req->sv1 = newSVsv (path);	698	req->sv1 = newSVsv (path);
1496	req->ptr2 = SvPVbyte_nolen (req->sv1);	699	req->ptr1 = SvPVbyte_nolen (req->sv1);
1497	req->sv2 = data;
1498	req->ptr1 = SvPVbyte_nolen (data);
1499		700
1500	REQ_SEND;	701	REQ_SEND;
1501	}	702	}
1502		703
1503	void	704	void
…		…
1505	PROTOTYPE: $$$$;$	706	PROTOTYPE: $$$$;$
1506	PPCODE:	707	PPCODE:
1507	{	708	{
1508	dREQ;	709	dREQ;
1509		710
1510	req->type = REQ_SENDFILE;	711	req->type = EIO_SENDFILE;
1511	req->sv1 = newSVsv (out_fh);	712	req->sv1 = newSVsv (out_fh);
1512	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1513	req->sv2 = newSVsv (in_fh);	714	req->sv2 = newSVsv (in_fh);
1514	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1515	req->offs = SvVAL64 (in_offset);	716	req->offs = SvVAL64 (in_offset);
…		…
1523	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
1524	PPCODE:	725	PPCODE:
1525	{	726	{
1526	dREQ;	727	dREQ;
1527		728
1528	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
1529	req->sv1 = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
1530	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1531	req->offs = SvVAL64 (offset);	732	req->offs = SvVAL64 (offset);
1532	req->size = length;	733	req->size = length;
1533		734
…		…
1535	}	736	}
1536		737
1537	void	738	void
1538	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1539	ALIAS:	740	ALIAS:
1540	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
1541	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
1542	PPCODE:	743	PPCODE:
1543	{	744	{
1544	dREQ;	745	dREQ;
1545		746
1546	req->ptr2 = malloc (sizeof (Stat_t));
1547	if (!req->ptr2)
1548	{
1549	req_destroy (req);
1550	croak ("out of memory during aio_stat statdata allocation");
1551	}
1552
1553	req->flags |= FLAG_PTR2_FREE;
1554	req->sv1 = newSVsv (fh_or_path);	747	req->sv1 = newSVsv (fh_or_path);
1555		748
1556	if (SvPOK (fh_or_path))	749	if (SvPOK (req->sv1))
1557	{	750	{
1558	req->type = ix;	751	req->type = ix;
1559	req->ptr1 = SvPVbyte_nolen (req->sv1);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
1560	}	753	}
1561	else	754	else
1562	{	755	{
1563	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
1564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1565	}	758	}
1566		759
1567	REQ_SEND;	760	REQ_SEND;
1568	}	761	}
…		…
1575		768
1576	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;	769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1577	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;	770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1578	req->sv1 = newSVsv (fh_or_path);	771	req->sv1 = newSVsv (fh_or_path);
1579		772
1580	if (SvPOK (fh_or_path))	773	if (SvPOK (req->sv1))
1581	{	774	{
1582	req->type = REQ_UTIME;	775	req->type = EIO_UTIME;
1583	req->ptr1 = SvPVbyte_nolen (req->sv1);	776	req->ptr1 = SvPVbyte_nolen (req->sv1);
1584	}	777	}
1585	else	778	else
1586	{	779	{
1587	req->type = REQ_FUTIME;	780	req->type = EIO_FUTIME;
1588	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1589	}	782	}
1590		783
1591	REQ_SEND;	784	REQ_SEND;
1592	}	785	}
1593		786
1594	void	787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
1595	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)	811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
1596	PPCODE:	815	PPCODE:
1597	{	816	{
1598	dREQ;	817	dREQ;
1599		818
1600	req->mode = mode;	819	req->int2 = mode;
1601	req->sv1 = newSVsv (fh_or_path);	820	req->sv1 = newSVsv (fh_or_path);
1602		821
1603	if (SvPOK (fh_or_path))	822	if (SvPOK (req->sv1))
1604	{	823	{
1605	req->type = REQ_CHMOD;	824	req->type = ix;
1606	req->ptr1 = SvPVbyte_nolen (req->sv1);	825	req->ptr1 = SvPVbyte_nolen (req->sv1);
1607	}	826	}
1608	else	827	else
1609	{	828	{
1610	req->type = REQ_FCHMOD;	829	req->type = EIO_FCHMOD;
1611	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1612	}	831	}
1613		832
1614	REQ_SEND;	833	REQ_SEND;
1615	}	834	}
…		…
1622		841
1623	req->int2 = SvOK (uid) ? SvIV (uid) : -1;	842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1624	req->int3 = SvOK (gid) ? SvIV (gid) : -1;	843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1625	req->sv1 = newSVsv (fh_or_path);	844	req->sv1 = newSVsv (fh_or_path);
1626		845
1627	if (SvPOK (fh_or_path))	846	if (SvPOK (req->sv1))
1628	{	847	{
1629	req->type = REQ_CHOWN;	848	req->type = EIO_CHOWN;
1630	req->ptr1 = SvPVbyte_nolen (req->sv1);	849	req->ptr1 = SvPVbyte_nolen (req->sv1);
1631	}	850	}
1632	else	851	else
1633	{	852	{
1634	req->type = REQ_FCHOWN;	853	req->type = EIO_FCHOWN;
1635	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1636	}	855	}
1637		856
1638	REQ_SEND;	857	REQ_SEND;
1639	}	858	}
1640		859
1641	void	860	void
1642	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1643	ALIAS:	862	ALIAS:
1644	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
1645	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
1646	aio_readdir = REQ_READDIR	865	aio_readdir = EIO_READDIR
1647	PPCODE:	866	PPCODE:
1648	{	867	{
1649	dREQ;	868	dREQ;
1650		869
1651	req->type = ix;	870	req->type = ix;
…		…
1654		873
1655	REQ_SEND;	874	REQ_SEND;
1656	}	875	}
1657		876
1658	void	877	void
1659	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)	878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		879	ALIAS:
		880	aio_link = EIO_LINK
		881	aio_symlink = EIO_SYMLINK
		882	aio_rename = EIO_RENAME
1660	PPCODE:	883	PPCODE:
1661	{	884	{
1662	dREQ;	885	dREQ;
1663		886
		887	req->type = ix;
		888	req->sv1 = newSVsv (oldpath);
		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
		890	req->sv2 = newSVsv (newpath);
		891	req->ptr2 = SvPVbyte_nolen (req->sv2);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		898	PPCODE:
		899	{
		900	dREQ;
		901
1664	req->type = REQ_MKDIR;	902	req->type = EIO_MKNOD;
1665	req->sv1 = newSVsv (pathname);	903	req->sv1 = newSVsv (pathname);
1666	req->ptr1 = SvPVbyte_nolen (req->sv1);	904	req->ptr1 = SvPVbyte_nolen (req->sv1);
1667	req->mode = mode;
1668
1669	REQ_SEND;
1670	}
1671
1672	void
1673	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1674	ALIAS:
1675	aio_link = REQ_LINK
1676	aio_symlink = REQ_SYMLINK
1677	aio_rename = REQ_RENAME
1678	PPCODE:
1679	{
1680	dREQ;
1681
1682	req->type = ix;
1683	req->sv2 = newSVsv (oldpath);
1684	req->ptr2 = SvPVbyte_nolen (req->sv2);
1685	req->sv1 = newSVsv (newpath);
1686	req->ptr1 = SvPVbyte_nolen (req->sv1);
1687
1688	REQ_SEND;
1689	}
1690
1691	void
1692	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1693	PPCODE:
1694	{
1695	dREQ;
1696
1697	req->type = REQ_MKNOD;
1698	req->sv1 = newSVsv (pathname);
1699	req->ptr1 = SvPVbyte_nolen (req->sv1);
1700	req->mode = (mode_t)mode;	905	req->int2 = (mode_t)mode;
1701	req->offs = dev;	906	req->offs = dev;
1702		907
1703	REQ_SEND;	908	REQ_SEND;
1704	}	909	}
1705		910
…		…
1707	aio_busy (double delay, SV *callback=&PL_sv_undef)	912	aio_busy (double delay, SV *callback=&PL_sv_undef)
1708	PPCODE:	913	PPCODE:
1709	{	914	{
1710	dREQ;	915	dREQ;
1711		916
1712	req->type = REQ_BUSY;	917	req->type = EIO_BUSY;
1713	req->nv1 = delay < 0. ? 0. : delay;	918	req->nv1 = delay < 0. ? 0. : delay;
1714		919
1715	REQ_SEND;	920	REQ_SEND;
1716	}	921	}
1717		922
…		…
1720	PROTOTYPE: ;$	925	PROTOTYPE: ;$
1721	PPCODE:	926	PPCODE:
1722	{	927	{
1723	dREQ;	928	dREQ;
1724		929
1725	req->type = REQ_GROUP;	930	req->type = EIO_GROUP;
1726		931
1727	req_send (req);	932	req_submit (req);
1728	XPUSHs (req_sv (req, AIO_GRP_KLASS));	933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1729	}	934	}
1730		935
1731	void	936	void
1732	aio_nop (SV *callback=&PL_sv_undef)	937	aio_nop (SV *callback=&PL_sv_undef)
		938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
1733	PPCODE:	941	PPCODE:
1734	{	942	{
1735	dREQ;	943	dREQ;
1736		944
1737	req->type = REQ_NOP;	945	req->type = ix;
1738		946
1739	REQ_SEND;	947	REQ_SEND;
1740	}	948	}
1741		949
1742	int	950	int
1743	aioreq_pri (int pri = 0)	951	aioreq_pri (int pri = 0)
1744	PROTOTYPE: ;$	952	PROTOTYPE: ;$
1745	CODE:	953	CODE:
1746	RETVAL = next_pri - PRI_BIAS;	954	RETVAL = next_pri;
1747	if (items > 0)	955	if (items > 0)
1748	{	956	{
1749	if (pri < PRI_MIN) pri = PRI_MIN;	957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1750	if (pri > PRI_MAX) pri = PRI_MAX;	958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1751	next_pri = pri + PRI_BIAS;	959	next_pri = pri;
1752	}	960	}
1753	OUTPUT:	961	OUTPUT:
1754	RETVAL	962	RETVAL
1755		963
1756	void	964	void
1757	aioreq_nice (int nice = 0)	965	aioreq_nice (int nice = 0)
1758	CODE:	966	CODE:
1759	nice = next_pri - nice;	967	nice = next_pri - nice;
1760	if (nice < PRI_MIN) nice = PRI_MIN;	968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1761	if (nice > PRI_MAX) nice = PRI_MAX;	969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1762	next_pri = nice + PRI_BIAS;	970	next_pri = nice;
1763		971
1764	void	972	void
1765	flush ()	973	flush ()
1766	PROTOTYPE:	974	PROTOTYPE:
1767	CODE:	975	CODE:
1768	while (nreqs)	976	while (eio_nreqs ())
1769	{	977	{
1770	poll_wait ();	978	poll_wait ();
1771	poll_cb ();	979	poll_cb ();
1772	}	980	}
1773		981
…		…
1800	poll_wait()	1008	poll_wait()
1801	PROTOTYPE:	1009	PROTOTYPE:
1802	CODE:	1010	CODE:
1803	poll_wait ();	1011	poll_wait ();
1804		1012
1805	void
1806	setsig (int signum = SIGIO)
1807	PROTOTYPE: ;$
1808	CODE:
1809	{
1810	if (block_sig_level)
1811	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1812
1813	LOCK (reslock);
1814	main_tid = pthread_self ();
1815	main_sig = signum;
1816	UNLOCK (reslock);
1817
1818	if (main_sig && npending)
1819	pthread_kill (main_tid, main_sig);
1820	}
1821
1822	void
1823	aio_block (SV *cb)
1824	PROTOTYPE: &
1825	PPCODE:
1826	{
1827	int count;
1828
1829	block_sig ();
1830	PUSHMARK (SP);
1831	PUTBACK;
1832	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1833	SPAGAIN;
1834	unblock_sig ();
1835
1836	if (SvTRUE (ERRSV))
1837	croak (0);
1838
1839	XSRETURN (count);
1840	}
1841
1842	int	1013	int
1843	nreqs()	1014	nreqs()
1844	PROTOTYPE:	1015	PROTOTYPE:
1845	CODE:	1016	CODE:
1846	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
1847	OUTPUT:	1018	OUTPUT:
1848	RETVAL	1019	RETVAL
1849		1020
1850	int	1021	int
1851	nready()	1022	nready()
1852	PROTOTYPE:	1023	PROTOTYPE:
1853	CODE:	1024	CODE:
1854	RETVAL = get_nready ();	1025	RETVAL = eio_nready ();
1855	OUTPUT:	1026	OUTPUT:
1856	RETVAL	1027	RETVAL
1857		1028
1858	int	1029	int
1859	npending()	1030	npending()
1860	PROTOTYPE:	1031	PROTOTYPE:
1861	CODE:	1032	CODE:
1862	RETVAL = get_npending ();	1033	RETVAL = eio_npending ();
1863	OUTPUT:	1034	OUTPUT:
1864	RETVAL	1035	RETVAL
1865		1036
1866	int	1037	int
1867	nthreads()	1038	nthreads()
1868	PROTOTYPE:	1039	PROTOTYPE:
1869	CODE:	1040	CODE:
1870	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1041	RETVAL = eio_nthreads ();
1871	RETVAL = started;
1872	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1873	OUTPUT:	1042	OUTPUT:
1874	RETVAL	1043	RETVAL
1875		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
1876	PROTOTYPES: DISABLE	1050	PROTOTYPES: DISABLE
1877		1051
1878	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1879		1053
1880	void	1054	void
1881	cancel (aio_req_ornot req)	1055	cancel (aio_req_ornot req)
1882	CODE:	1056	CODE:
1883	req_cancel (req);	1057	eio_cancel (req);
1884		1058
1885	void	1059	void
1886	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1887	CODE:	1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
1888	SvREFCNT_dec (req->callback);	1070	SvREFCNT_dec (req->callback);
1889	req->callback = newSVsv (callback);	1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
1890		1074
1891	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1892		1076
1893	void	1077	void
1894	add (aio_req grp, ...)	1078	add (aio_req grp, ...)
1895	PPCODE:	1079	PPCODE:
1896	{	1080	{
1897	int i;	1081	int i;
1898	aio_req req;
1899
1900	if (main_sig && !block_sig_level)
1901	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1902		1082
1903	if (grp->int1 == 2)	1083	if (grp->int1 == 2)
1904	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1905		1085
1906	for (i = 1; i < items; ++i )	1086	for (i = 1; i < items; ++i )
1907	{	1087	{
		1088	aio_req req;
		1089
1908	if (GIMME_V != G_VOID)	1090	if (GIMME_V != G_VOID)
1909	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1910		1092
1911	req = SvAIO_REQ (ST (i));	1093	req = SvAIO_REQ (ST (i));
1912		1094
1913	if (req)	1095	if (req)
1914	{	1096	eio_grp_add (grp, req);
1915	++grp->size;
1916	req->grp = grp;
1917
1918	req->grp_prev = 0;
1919	req->grp_next = grp->grp_first;
1920
1921	if (grp->grp_first)
1922	grp->grp_first->grp_prev = req;
1923
1924	grp->grp_first = req;
1925	}
1926	}	1097	}
1927	}	1098	}
1928		1099
1929	void	1100	void
1930	cancel_subs (aio_req_ornot req)	1101	cancel_subs (aio_req_ornot req)
…		…
1955	grp->errorno = errorno;	1126	grp->errorno = errorno;
1956		1127
1957	void	1128	void
1958	limit (aio_req grp, int limit)	1129	limit (aio_req grp, int limit)
1959	CODE:	1130	CODE:
1960	grp->int2 = limit;	1131	eio_grp_limit (grp, limit);
1961	aio_grp_feed (grp);
1962		1132
1963	void	1133	void
1964	feed (aio_req grp, SV *callback=&PL_sv_undef)	1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
1965	CODE:	1135	CODE:
1966	{	1136	{
…		…
1968	grp->sv2 = newSVsv (callback);	1138	grp->sv2 = newSVsv (callback);
1969		1139
1970	if (grp->int2 <= 0)	1140	if (grp->int2 <= 0)
1971	grp->int2 = 2;	1141	grp->int2 = 2;
1972		1142
1973	aio_grp_feed (grp);	1143	eio_grp_limit (grp, grp->int2);
1974	}	1144	}
1975		1145

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