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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.83 by root, Sat Oct 28 00:17:30 2006 UTC vs.
Revision 1.153 by root, Wed Jul 15 01:36:04 2009 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	/* perl namespace pollution */
34	# if __linux	21	#undef VERSION
35	# include <sys/sendfile.h>	22
36	# elif __freebsd	23	#ifdef _WIN32
37	# include <sys/socket.h>	24
38	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	26	# undef malloc
40	# include <sys/socket.h>	27	# undef free
41	# elif __solaris /* not yet */	28
42	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
43	# else	61	#else
44	# error sendfile support requested but not available	62
45	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
46	#endif	70	#endif
47		71
48	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
49	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
50	# define NAME_MAX 4096	74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
51	#endif	89	#endif
52		90
53	#ifndef PTHREAD_STACK_MIN	91	/*****************************************************************************/
54	/* care for broken platforms, e.g. windows */	92
55	# define PTHREAD_STACK_MIN 16384	93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
56	#endif	97	#endif
57		98
58	#if __ia64	99	#define expect_false(expr) expect ((expr) != 0, 0)
59	# define STACKSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif
65		101
66	/* wether word reads are potentially non-atomic.	102	/*****************************************************************************/
67	* this is conservatice, likely most arches this runs
68	* on have atomic word read/writes.
69	*/
70	#ifndef WORDREAD_UNSAFE
71	# if __i386 || __x86_64
72	# define WORDREAD_UNSAFE 0
73	# else
74	# define WORDREAD_UNSAFE 1
75	# endif
76	#endif
77		103
78	/* buffer size for various temporary buffers */	104	static HV *stash;
79	#define AIO_BUFSIZE 65536	105	typedef SV SV8; /* byte-sv, used for argument-checking */
80		106	typedef int aio_rfd; /* read file desriptor */
81	#define dBUF \	107	typedef int aio_wfd; /* write file descriptor */
82	char *aio_buf; \
83	LOCK (wrklock); \
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
85	UNLOCK (wrklock); \
86	if (!aio_buf) \
87	return -1;
88
89	enum {
90	REQ_QUIT,
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_MKNOD, REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};
102		108
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
105		111
106	typedef struct aio_cb	112	#define EIO_REQ_MEMBERS \
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;	113	SV *callback; \
111	SV *fh, *fh2;	114	SV *sv1, *sv2; \
112	void *dataptr, *data2ptr;
113	Stat_t *statdata;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117
118	STRLEN dataoffset;	115	STRLEN stroffset; \
119	int type;	116	SV *self;
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123		117
124	unsigned char flags;	118	#define EIO_NO_WRAPPERS 1
125	unsigned char pri;
126		119
127	SV *self; /* the perl counterpart of this request, if any */	120	#include "libeio/eio.h"
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	121
129	} aio_cb;	122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
130		151
131	enum {	152	enum {
132	FLAG_CANCELLED = 0x01,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
133	};	154	};
134		155
		156	#include "libeio/eio.c"
		157
135	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	159	typedef eio_req *aio_req_ornot;
137		160
138	enum {	161	static SV *on_next_submit;
139	PRI_MIN = -4,	162	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	163	static int max_outstanding;
141		164
142	DEFAULT_PRI = 0,
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150
151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153	#else
154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155	#endif
156
157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160	/* worker threads management */
161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163	typedef struct worker {
164	/* locked by wrklock */
165	struct worker *prev, *next;
166
167	pthread_t tid;
168
169	/* locked by reslock, reqlock or wrklock */
170	aio_req req; /* currently processed request */
171	void *dbuf;
172	DIR *dirp;
173	} worker;
174
175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177	static void worker_clear (worker *wrk)
178	{
179	if (wrk->dirp)
180	{
181	closedir (wrk->dirp);
182	wrk->dirp = 0;
183	}
184
185	if (wrk->dbuf)
186	{
187	free (wrk->dbuf);
188	wrk->dbuf = 0;
189	}
190	}
191
192	static void worker_free (worker *wrk)
193	{
194	wrk->next->prev = wrk->prev;
195	wrk->prev->next = wrk->next;
196
197	free (wrk);
198	}
199
200	static volatile unsigned int nreqs, nready, npending;
201	static volatile unsigned int max_outstanding = 0xffffffff;
202	static int respipe [2];	165	static int respipe_osf [2];
		166	static s_epipe respipe;
203		167
204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
207
208	#if WORDREAD_UNSAFE
209
210	static unsigned int get_nready ()
211	{
212	unsigned int retval;
213
214	LOCK (reqlock);
215	retval = nready;
216	UNLOCK (reqlock);
217
218	return retval;
219	}
220
221	static unsigned int get_npending ()
222	{
223	unsigned int retval;
224
225	LOCK (reslock);
226	retval = npending;
227	UNLOCK (reslock);
228
229	return retval;
230	}
231
232	#else
233
234	# define get_nready() nready
235	# define get_npending() npending
236
237	#endif
238
239	/*
240	* a somewhat faster data structure might be nice, but
241	* with 8 priorities this actually needs <20 insns
242	* per shift, the most expensive operation.
243	*/
244	typedef struct {
245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246	int size;
247	} reqq;
248
249	static reqq req_queue;
250	static reqq res_queue;
251
252	int reqq_push (reqq *q, aio_req req)
253	{
254	int pri = req->pri;
255	req->next = 0;
256
257	if (q->qe[pri])
258	{
259	q->qe[pri]->next = req;
260	q->qe[pri] = req;
261	}
262	else
263	q->qe[pri] = q->qs[pri] = req;
264
265	return q->size++;
266	}
267
268	aio_req reqq_shift (reqq *q)
269	{
270	int pri;
271
272	if (!q->size)
273	return 0;
274
275	--q->size;
276
277	for (pri = NUM_PRI; pri--; )
278	{
279	aio_req req = q->qs[pri];
280
281	if (req)
282	{
283	if (!(q->qs[pri] = req->next))
284	q->qe[pri] = 0;
285
286	return req;
287	}
288	}
289
290	abort ();
291	}
292
293	static int poll_cb (int max);
294	static void req_invoke (aio_req req);
295	static void req_free (aio_req req);	168	static void req_destroy (aio_req req);
296	static void req_cancel (aio_req req);	169	static void req_cancel (aio_req req);
		170
		171	static void want_poll (void)
		172	{
		173	/* write a dummy byte to the pipe so fh becomes ready */
		174	s_epipe_signal (&respipe);
		175	}
		176
		177	static void done_poll (void)
		178	{
		179	/* read any signals sent by the worker threads */
		180	s_epipe_drain (&respipe);
		181	}
297		182
298	/* must be called at most once */	183	/* must be called at most once */
299	static SV *req_sv (aio_req req, const char *klass)	184	static SV *req_sv (aio_req req, const char *klass)
300	{	185	{
301	if (!req->self)	186	if (!req->self)
…		…
319	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	205	}
321		206
322	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
323	{	208	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	209	if (grp->sv2 && SvOK (grp->sv2))
325	{	210	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	211	dSP;
331		212
332	ENTER;	213	ENTER;
333	SAVETMPS;	214	SAVETMPS;
334	PUSHMARK (SP);	215	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
336	PUTBACK;	217	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	219	SPAGAIN;
339	FREETMPS;	220	FREETMPS;
340	LEAVE;	221	LEAVE;
341	}
342
343	/* stop if no progress has been made */
344	if (old_len == grp->length)
345	{
346	SvREFCNT_dec (grp->fh2);
347	grp->fh2 = 0;
348	break;
349	}
350	}	222	}
351	}	223	}
352		224
353	static void aio_grp_dec (aio_req grp)	225	static void req_submit (eio_req *req)
354	{	226	{
355	--grp->length;	227	eio_submit (req);
356		228
357	/* call feeder, if applicable */	229	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	230	{
363	req_invoke (grp);	231	dSP;
364	req_free (grp);	232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
365	}	239	}
366	}	240	}
367		241
368	static void req_invoke (aio_req req)	242	static int req_invoke (eio_req *req)
369	{	243	{
370	dSP;	244	dSP;
371		245
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
373	{	250	{
374	ENTER;	251	ENTER;
375	SAVETMPS;	252	SAVETMPS;
376	PUSHMARK (SP);	253	PUSHMARK (SP);
377	EXTEND (SP, 1);	254	EXTEND (SP, 1);
378		255
379	switch (req->type)	256	switch (req->type)
380	{	257	{
381	case REQ_READDIR:	258	case EIO_READDIR:
382	{	259	{
383	SV *rv = &PL_sv_undef;	260	SV *rv = &PL_sv_undef;
384		261
385	if (req->result >= 0)	262	if (req->result >= 0)
386	{	263	{
387	int i;	264	int i;
388	char *buf = req->data2ptr;	265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	267	AV *av = newAV ();
390		268
391	av_extend (av, req->result - 1);	269	av_extend (av, req->result - 1);
392		270
393	for (i = 0; i < req->result; ++i)	271	for (i = 0; i < req->result; ++i)
394	{	272	{
395	SV *sv = newSVpv (buf, 0);	273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
397	av_store (av, i, sv);	297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	305	names += SvCUR (name) + 1;
		306	}
399	}	307	}
400		308
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	309	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	310	}
403		311
404	PUSHs (rv);	312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	316	}
406	break;	317	break;
407		318
408	case REQ_OPEN:	319	case EIO_OPEN:
409	{	320	{
410	/* convert fd to fh */	321	/* convert fd to fh */
411	SV *fh;	322	SV *fh = &PL_sv_undef;
412		323
413	PUSHs (sv_2mortal (newSViv (req->result)));	324	if (req->result >= 0)
414	PUTBACK;	325	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	326	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, stash, sym, symlen, 0);
417		333
418	fh = SvREFCNT_inc (POPs);	334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
419		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
420	PUSHMARK (SP);	346	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	347	}
423	break;	348	break;
424		349
425	case REQ_GROUP:	350	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	351	req->int1 = 2; /* mark group as finished */
427		352
428	if (req->data)	353	if (req->sv1)
429	{	354	{
430	int i;	355	int i;
431	AV *av = (AV *)req->data;	356	AV *av = (AV *)req->sv1;
432		357
433	EXTEND (SP, AvFILL (av) + 1);	358	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	359	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	360	PUSHs (*av_fetch (av, i, 0));
436	}	361	}
437	break;	362	break;
438		363
439	case REQ_NOP:	364	case EIO_NOP:
440	case REQ_BUSY:	365	case EIO_BUSY:
441	break;	366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
442		396
443	default:	397	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	398	PUSHs (sv_2mortal (newSViv (req->result)));
445	break;	399	break;
446	}	400	}
447		401
448	errno = req->errorno;	402	errno = req->errorno;
449		403
450	PUTBACK;	404	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	406	SPAGAIN;
453		407
454	FREETMPS;	408	FREETMPS;
455	LEAVE;	409	LEAVE;
		410
		411	PUTBACK;
456	}	412	}
457		413
458	if (req->grp)	414	return !!SvTRUE (ERRSV);
459	{
460	aio_req grp = req->grp;
461
462	/* unlink request */
463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466	if (grp->grp_first == req)
467	grp->grp_first = req->grp_next;
468
469	aio_grp_dec (grp);
470	}
471
472	if (SvTRUE (ERRSV))
473	{
474	req_free (req);
475	croak (0);
476	}
477	}	415	}
478		416
479	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
480	{	418	{
481	if (req->self)	419	if (req->self)
482	{	420	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
485	}	423	}
486		424
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
490	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495		428
496	Safefree (req);	429	Safefree (req);
497	}	430	}
498		431
499	static void req_cancel_subs (aio_req grp)	432	static void req_cancel_subs (aio_req grp)
500	{	433	{
501	aio_req sub;	434	aio_req sub;
502		435
503	if (grp->type != REQ_GROUP)	436	if (grp->type != EIO_GROUP)
504	return;	437	return;
505		438
506	SvREFCNT_dec (grp->fh2);	439	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	440	grp->sv2 = 0;
508		441
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	442	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	443	}
512		444
513	static void req_cancel (aio_req req)	445	static void
		446	create_respipe (void)
514	{	447	{
515	req->flags |= FLAG_CANCELLED;	448	if (s_epipe_renew (&respipe))
		449	croak ("unable to initialize result pipe");
516		450
517	req_cancel_subs (req);	451	respipe_osf [0] = S_TO_SOCKET (respipe.fd [0]);
		452	respipe_osf [1] = S_TO_SOCKET (respipe.fd [1]);
518	}	453	}
519		454
520	static void *aio_proc(void *arg);
521
522	static void start_thread (void)
523	{
524	sigset_t fullsigset, oldsigset;
525	pthread_attr_t attr;
526
527	worker *wrk = calloc (1, sizeof (worker));
528
529	if (!wrk)
530	croak ("unable to allocate worker thread data");
531
532	pthread_attr_init (&attr);
533	pthread_attr_setstacksize (&attr, STACKSIZE);
534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535	#ifdef PTHREAD_SCOPE_PROCESS
536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537	#endif
538
539	sigfillset (&fullsigset);
540
541	LOCK (wrklock);
542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
543
544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545	{
546	wrk->prev = &wrk_first;
547	wrk->next = wrk_first.next;
548	wrk_first.next->prev = wrk;
549	wrk_first.next = wrk;
550	++started;
551	}
552	else
553	free (wrk);
554
555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
556	UNLOCK (wrklock);
557	}
558
559	static void maybe_start_thread ()
560	{
561	#if 0
562	static struct timeval last;
563	struct timeval diff, now;
564	#endif
565
566	if (started >= wanted)
567	return;
568
569	if (nready <= nreqs - get_nready () - get_npending ())
570	return;
571
572	#if 0
573	gettimeofday (&now, 0);
574
575	diff.tv_sec = now.tv_sec - last.tv_sec;
576	diff.tv_usec = now.tv_usec - last.tv_usec;
577
578	if (diff.tv_usec < 0)
579	{
580	--diff.tv_sec;
581	diff.tv_usec += 1000000;
582	}
583
584	if (!diff.tv_sec && diff.tv_usec < 10000)
585	return;
586
587	last = now;
588	#endif
589
590	start_thread ();
591	}
592
593	static void req_send (aio_req req)
594	{
595	++nreqs;
596
597	LOCK (reqlock);
598	++nready;
599	reqq_push (&req_queue, req);
600	pthread_cond_signal (&reqwait);
601	UNLOCK (reqlock);
602
603	maybe_start_thread ();
604	}
605
606	static void end_thread (void)
607	{
608	aio_req req;
609
610	Newz (0, req, 1, aio_cb);
611
612	req->type = REQ_QUIT;
613	req->pri = PRI_MAX + PRI_BIAS;
614
615	LOCK (reqlock);
616	reqq_push (&req_queue, req);
617	pthread_cond_signal (&reqwait);
618	UNLOCK (reqlock);
619
620	LOCK (wrklock);
621	--started;
622	UNLOCK (wrklock);
623	}
624
625	static void min_parallel (int nthreads)
626	{
627	if (wanted < nthreads)
628	wanted = nthreads;
629	}
630
631	static void max_parallel (int nthreads)
632	{
633	if (wanted > nthreads)
634	wanted = nthreads;
635
636	while (started > wanted)
637	end_thread ();
638	}
639
640	static void poll_wait ()	455	static void poll_wait (void)
641	{	456	{
642	fd_set rfd;
643
644	while (nreqs)	457	while (eio_nreqs ())
645	{	458	{
646	int size;	459	int size;
647	if (WORDREAD_UNSAFE) LOCK (reslock);	460
		461	X_LOCK (reslock);
648	size = res_queue.size;	462	size = res_queue.size;
649	if (WORDREAD_UNSAFE) UNLOCK (reslock);	463	X_UNLOCK (reslock);
650		464
651	if (size)	465	if (size)
652	return;	466	return;
653		467
654	maybe_start_thread ();	468	etp_maybe_start_thread ();
655		469
656	FD_ZERO(&rfd);	470	s_epipe_wait (&respipe);
657	FD_SET(respipe [0], &rfd);
658
659	select (respipe [0] + 1, &rfd, 0, 0, 0);
660	}	471	}
661	}	472	}
662		473
663	static int poll_cb (int max)	474	static int poll_cb (void)
664	{	475	{
665	dSP;
666	int count = 0;
667	int do_croak = 0;
668	aio_req req;
669
670	for (;;)	476	for (;;)
671	{	477	{
672	while (max <= 0 || count < max)	478	int res = eio_poll ();
673	{
674	maybe_start_thread ();
675		479
676	LOCK (reslock);	480	if (res > 0)
677	req = reqq_shift (&res_queue);
678
679	if (req)
680	{
681	--npending;
682
683	if (!res_queue.size)
684	{
685	/* read any signals sent by the worker threads */
686	char buf [32];
687	while (read (respipe [0], buf, 32) == 32)
688	;
689	}
690	}
691
692	UNLOCK (reslock);
693
694	if (!req)
695	break;
696
697	--nreqs;
698
699	if (req->type == REQ_GROUP && req->length)
700	{
701	req->fd = 1; /* mark request as delayed */
702	continue;
703	}
704	else
705	{
706	if (req->type == REQ_READ)
707	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
708
709	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
710	SvREADONLY_off (req->data);
711
712	if (req->statdata)
713	{
714	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
715	PL_laststatval = req->result;
716	PL_statcache = *(req->statdata);
717	}
718
719	req_invoke (req);
720
721	count++;
722	}
723
724	req_free (req);
725	}
726
727	if (nreqs <= max_outstanding)
728	break;	481	croak (0);
		482
		483	if (!max_outstanding || max_outstanding > eio_nreqs ())
		484	return res;
729		485
730	poll_wait ();	486	poll_wait ();
731
732	max = 0;
733	}	487	}
734
735	return count;
736	}
737
738	static void create_pipe ()
739	{
740	if (pipe (respipe))
741	croak ("unable to initialize result pipe");
742
743	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
744	croak ("cannot set result pipe to nonblocking mode");
745
746	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
747	croak ("cannot set result pipe to nonblocking mode");
748	}
749
750	/*****************************************************************************/
751	/* work around various missing functions */
752
753	#if !HAVE_PREADWRITE
754	# define pread aio_pread
755	# define pwrite aio_pwrite
756
757	/*
758	* make our pread/pwrite safe against themselves, but not against
759	* normal read/write by using a mutex. slows down execution a lot,
760	* but that's your problem, not mine.
761	*/
762	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
763
764	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
765	{
766	ssize_t res;
767	off_t ooffset;
768
769	LOCK (preadwritelock);
770	ooffset = lseek (fd, 0, SEEK_CUR);
771	lseek (fd, offset, SEEK_SET);
772	res = read (fd, buf, count);
773	lseek (fd, ooffset, SEEK_SET);
774	UNLOCK (preadwritelock);
775
776	return res;
777	}
778
779	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
780	{
781	ssize_t res;
782	off_t ooffset;
783
784	LOCK (preadwritelock);
785	ooffset = lseek (fd, 0, SEEK_CUR);
786	lseek (fd, offset, SEEK_SET);
787	res = write (fd, buf, count);
788	lseek (fd, offset, SEEK_SET);
789	UNLOCK (preadwritelock);
790
791	return res;
792	}
793	#endif
794
795	#if !HAVE_FDATASYNC
796	# define fdatasync fsync
797	#endif
798
799	#if !HAVE_READAHEAD
800	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
801
802	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
803	{
804	dBUF;
805
806	while (count > 0)
807	{
808	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
809
810	pread (fd, aio_buf, len, offset);
811	offset += len;
812	count -= len;
813	}
814
815	errno = 0;
816	}
817
818	#endif
819
820	#if !HAVE_READDIR_R
821	# define readdir_r aio_readdir_r
822
823	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
824
825	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
826	{
827	struct dirent *e;
828	int errorno;
829
830	LOCK (readdirlock);
831
832	e = readdir (dirp);
833	errorno = errno;
834
835	if (e)
836	{
837	*res = ent;
838	strcpy (ent->d_name, e->d_name);
839	}
840	else
841	*res = 0;
842
843	UNLOCK (readdirlock);
844
845	errno = errorno;
846	return e ? 0 : -1;
847	}
848	#endif
849
850	/* sendfile always needs emulation */
851	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
852	{
853	ssize_t res;
854
855	if (!count)
856	return 0;
857
858	#if HAVE_SENDFILE
859	# if __linux
860	res = sendfile (ofd, ifd, &offset, count);
861
862	# elif __freebsd
863	/*
864	* Of course, the freebsd sendfile is a dire hack with no thoughts
865	* wasted on making it similar to other I/O functions.
866	*/
867	{
868	off_t sbytes;
869	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
870
871	if (res < 0 && sbytes)
872	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
873	res = sbytes;
874	}
875
876	# elif __hpux
877	res = sendfile (ofd, ifd, offset, count, 0, 0);
878
879	# elif __solaris
880	{
881	struct sendfilevec vec;
882	size_t sbytes;
883
884	vec.sfv_fd = ifd;
885	vec.sfv_flag = 0;
886	vec.sfv_off = offset;
887	vec.sfv_len = count;
888
889	res = sendfilev (ofd, &vec, 1, &sbytes);
890
891	if (res < 0 && sbytes)
892	res = sbytes;
893	}
894
895	# endif
896	#else
897	res = -1;
898	errno = ENOSYS;
899	#endif
900
901	if (res < 0
902	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
903	#if __solaris
904	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
905	#endif
906	)
907	)
908	{
909	/* emulate sendfile. this is a major pain in the ass */
910	dBUF;
911
912	res = 0;
913
914	while (count)
915	{
916	ssize_t cnt;
917
918	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
919
920	if (cnt <= 0)
921	{
922	if (cnt && !res) res = -1;
923	break;
924	}
925
926	cnt = write (ofd, aio_buf, cnt);
927
928	if (cnt <= 0)
929	{
930	if (cnt && !res) res = -1;
931	break;
932	}
933
934	offset += cnt;
935	res += cnt;
936	count -= cnt;
937	}
938	}
939
940	return res;
941	}
942
943	/* read a full directory */
944	static void scandir_ (aio_req req, worker *self)
945	{
946	DIR *dirp;
947	union
948	{
949	struct dirent d;
950	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
951	} *u;
952	struct dirent *entp;
953	char *name, *names;
954	int memlen = 4096;
955	int memofs = 0;
956	int res = 0;
957	int errorno;
958
959	LOCK (wrklock);
960	self->dirp = dirp = opendir (req->dataptr);
961	self->dbuf = u = malloc (sizeof (*u));
962	req->data2ptr = names = malloc (memlen);
963	UNLOCK (wrklock);
964
965	if (dirp && u && names)
966	for (;;)
967	{
968	errno = 0;
969	readdir_r (dirp, &u->d, &entp);
970
971	if (!entp)
972	break;
973
974	name = entp->d_name;
975
976	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
977	{
978	int len = strlen (name) + 1;
979
980	res++;
981
982	while (memofs + len > memlen)
983	{
984	memlen *= 2;
985	LOCK (wrklock);
986	req->data2ptr = names = realloc (names, memlen);
987	UNLOCK (wrklock);
988
989	if (!names)
990	break;
991	}
992
993	memcpy (names + memofs, name, len);
994	memofs += len;
995	}
996	}
997
998	if (errno)
999	res = -1;
1000
1001	req->result = res;
1002	}
1003
1004	/*****************************************************************************/
1005
1006	static void *aio_proc (void *thr_arg)
1007	{
1008	aio_req req;
1009	worker *self = (worker *)thr_arg;
1010
1011	for (;;)
1012	{
1013	LOCK (reqlock);
1014
1015	for (;;)
1016	{
1017	self->req = req = reqq_shift (&req_queue);
1018
1019	if (req)
1020	break;
1021
1022	pthread_cond_wait (&reqwait, &reqlock);
1023	}
1024
1025	--nready;
1026
1027	UNLOCK (reqlock);
1028
1029	errno = 0; /* strictly unnecessary */
1030
1031	if (!(req->flags & FLAG_CANCELLED))
1032	switch (req->type)
1033	{
1034	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1035	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1036
1037	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1038	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1039
1040	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1041	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1042	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1043
1044	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1045	case REQ_CLOSE: req->result = close (req->fd); break;
1046	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1047	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1048	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1049	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1050	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1051	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1052
1053	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1054	case REQ_FSYNC: req->result = fsync (req->fd); break;
1055	case REQ_READDIR: scandir_ (req, self); break;
1056
1057	case REQ_BUSY:
1058	{
1059	struct timeval tv;
1060
1061	tv.tv_sec = req->fd;
1062	tv.tv_usec = req->fd2;
1063
1064	req->result = select (0, 0, 0, 0, &tv);
1065	}
1066
1067	case REQ_GROUP:
1068	case REQ_NOP:
1069	break;
1070
1071	case REQ_QUIT:
1072	LOCK (wrklock);
1073	worker_free (self);
1074	--started;
1075	UNLOCK (wrklock);
1076	return 0;
1077
1078	default:
1079	req->result = ENOSYS;
1080	break;
1081	}
1082
1083	req->errorno = errno;
1084
1085	LOCK (reslock);
1086
1087	++npending;
1088
1089	if (!reqq_push (&res_queue, req))
1090	/* write a dummy byte to the pipe so fh becomes ready */
1091	write (respipe [1], &respipe, 1);
1092
1093	self->req = 0;
1094	worker_clear (self);
1095
1096	UNLOCK (reslock);
1097	}
1098	}
1099
1100	/*****************************************************************************/
1101
1102	static void atfork_prepare (void)
1103	{
1104	LOCK (wrklock);
1105	LOCK (reqlock);
1106	LOCK (reslock);
1107	#if !HAVE_PREADWRITE
1108	LOCK (preadwritelock);
1109	#endif
1110	#if !HAVE_READDIR_R
1111	LOCK (readdirlock);
1112	#endif
1113	}
1114
1115	static void atfork_parent (void)
1116	{
1117	#if !HAVE_READDIR_R
1118	UNLOCK (readdirlock);
1119	#endif
1120	#if !HAVE_PREADWRITE
1121	UNLOCK (preadwritelock);
1122	#endif
1123	UNLOCK (reslock);
1124	UNLOCK (reqlock);
1125	UNLOCK (wrklock);
1126	}	488	}
1127		489
1128	static void atfork_child (void)	490	static void atfork_child (void)
1129	{	491	{
1130	aio_req prv;
1131
1132	while (prv = reqq_shift (&req_queue))
1133	req_free (prv);
1134
1135	while (prv = reqq_shift (&res_queue))
1136	req_free (prv);
1137
1138	while (wrk_first.next != &wrk_first)
1139	{
1140	worker *wrk = wrk_first.next;
1141
1142	if (wrk->req)
1143	req_free (wrk->req);
1144
1145	worker_clear (wrk);
1146	worker_free (wrk);
1147	}
1148
1149	started = 0;
1150	nreqs = 0;
1151
1152	close (respipe [0]);
1153	close (respipe [1]);
1154	create_pipe ();	492	create_respipe ();
		493	}
1155		494
1156	atfork_parent ();	495	static SV *
		496	get_cb (SV *cb_sv)
		497	{
		498	SvGETMAGIC (cb_sv);
		499	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1157	}	500	}
1158		501
1159	#define dREQ \	502	#define dREQ \
		503	SV *cb_cv; \
1160	aio_req req; \	504	aio_req req; \
1161	int req_pri = next_pri; \	505	int req_pri = next_pri; \
1162	next_pri = DEFAULT_PRI + PRI_BIAS; \	506	next_pri = EIO_PRI_DEFAULT; \
1163	\	507	\
1164	if (SvOK (callback) && !SvROK (callback)) \	508	cb_cv = get_cb (callback); \
1165	croak ("callback must be undef or of reference type"); \
1166	\	509	\
1167	Newz (0, req, 1, aio_cb); \	510	Newz (0, req, 1, eio_req); \
1168	if (!req) \	511	if (!req) \
1169	croak ("out of memory during aio_req allocation"); \	512	croak ("out of memory during eio_req allocation"); \
1170	\	513	\
1171	req->callback = newSVsv (callback); \	514	req->callback = SvREFCNT_inc (cb_cv); \
1172	req->pri = req_pri	515	req->pri = req_pri
1173		516
1174	#define REQ_SEND \	517	#define REQ_SEND \
		518	PUTBACK; \
1175	req_send (req); \	519	req_submit (req); \
		520	SPAGAIN; \
1176	\	521	\
1177	if (GIMME_V != G_VOID) \	522	if (GIMME_V != G_VOID) \
1178	XPUSHs (req_sv (req, AIO_REQ_KLASS));	523	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1179		524
1180	MODULE = IO::AIO PACKAGE = IO::AIO	525	MODULE = IO::AIO PACKAGE = IO::AIO
1181		526
1182	PROTOTYPES: ENABLE	527	PROTOTYPES: ENABLE
1183		528
1184	BOOT:	529	BOOT:
1185	{	530	{
		531	static const struct {
		532	const char *name;
		533	IV iv;
		534	} *civ, const_iv[] = {
		535	# define const_iv(name, value) { # name, (IV) value },
		536	# define const_eio(name) { # name, (IV) EIO_ ## name },
		537	const_iv (EXDEV , EXDEV)
		538	const_iv (ENOSYS , ENOSYS)
		539	const_iv (O_RDONLY, O_RDONLY)
		540	const_iv (O_WRONLY, O_WRONLY)
		541	const_iv (O_CREAT , O_CREAT)
		542	const_iv (O_TRUNC , O_TRUNC)
		543	#ifndef _WIN32
		544	const_iv (S_IFIFO , S_IFIFO)
		545	#endif
		546	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		547	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		548	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		549	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		550	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		551	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		552
		553	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		554	const_eio (SYNC_FILE_RANGE_WRITE)
		555	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		556
		557	const_eio (READDIR_DENTS)
		558	const_eio (READDIR_DIRS_FIRST)
		559	const_eio (READDIR_STAT_ORDER)
		560	const_eio (READDIR_FOUND_UNKNOWN)
		561
		562	const_eio (DT_UNKNOWN)
		563	const_eio (DT_FIFO)
		564	const_eio (DT_CHR)
		565	const_eio (DT_DIR)
		566	const_eio (DT_BLK)
		567	const_eio (DT_REG)
		568	const_eio (DT_LNK)
		569	const_eio (DT_SOCK)
		570	const_eio (DT_WHT)
		571	};
		572
1186	HV *stash = gv_stashpv ("IO::AIO", 1);	573	stash = gv_stashpv ("IO::AIO", 1);
1187		574
1188	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	575	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1189	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	576	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
1190	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1191	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1192	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1193	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1194		577
1195	create_pipe ();	578	create_respipe ();
1196	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1197		579
1198	start_thread ();	580	if (eio_init (want_poll, done_poll) < 0)
		581	croak ("IO::AIO: unable to initialise eio library");
		582
		583	/* atfork child called in fifo order, so before eio's handler */
		584	X_THREAD_ATFORK (0, 0, atfork_child);
1199	}	585	}
		586
		587	void
		588	max_poll_reqs (int nreqs)
		589	PROTOTYPE: $
		590	CODE:
		591	eio_set_max_poll_reqs (nreqs);
		592
		593	void
		594	max_poll_time (double nseconds)
		595	PROTOTYPE: $
		596	CODE:
		597	eio_set_max_poll_time (nseconds);
1200		598
1201	void	599	void
1202	min_parallel (int nthreads)	600	min_parallel (int nthreads)
1203	PROTOTYPE: $	601	PROTOTYPE: $
		602	CODE:
		603	eio_set_min_parallel (nthreads);
1204		604
1205	void	605	void
1206	max_parallel (int nthreads)	606	max_parallel (int nthreads)
1207	PROTOTYPE: $	607	PROTOTYPE: $
		608	CODE:
		609	eio_set_max_parallel (nthreads);
1208		610
1209	int	611	void
		612	max_idle (int nthreads)
		613	PROTOTYPE: $
		614	CODE:
		615	eio_set_max_idle (nthreads);
		616
		617	void
1210	max_outstanding (int maxreqs)	618	max_outstanding (int maxreqs)
1211	PROTOTYPE: $	619	PROTOTYPE: $
1212	CODE:	620	CODE:
1213	RETVAL = max_outstanding;
1214	max_outstanding = maxreqs;	621	max_outstanding = maxreqs;
1215	OUTPUT:
1216	RETVAL
1217		622
1218	void	623	void
1219	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	624	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1220	SV * pathname
1221	int flags
1222	int mode
1223	SV * callback
1224	PROTOTYPE: $$$;$	625	PROTOTYPE: $$$;$
1225	PPCODE:	626	PPCODE:
1226	{	627	{
1227	dREQ;	628	dREQ;
1228		629
1229	req->type = REQ_OPEN;	630	req->type = EIO_OPEN;
1230	req->data = newSVsv (pathname);	631	req->sv1 = newSVsv (pathname);
1231	req->dataptr = SvPVbyte_nolen (req->data);	632	req->ptr1 = SvPVbyte_nolen (req->sv1);
1232	req->fd = flags;	633	req->int1 = flags;
1233	req->mode = mode;	634	req->int2 = mode;
1234		635
1235	REQ_SEND;	636	REQ_SEND;
1236	}	637	}
1237		638
1238	void	639	void
1239	aio_close (fh,callback=&PL_sv_undef)	640	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1240	SV * fh
1241	SV * callback
1242	PROTOTYPE: $;$	641	PROTOTYPE: $;$
1243	ALIAS:	642	ALIAS:
1244	aio_close = REQ_CLOSE
1245	aio_fsync = REQ_FSYNC	643	aio_fsync = EIO_FSYNC
1246	aio_fdatasync = REQ_FDATASYNC	644	aio_fdatasync = EIO_FDATASYNC
1247	PPCODE:	645	PPCODE:
1248	{	646	{
		647	int fd = s_fileno_croak (fh, 0);
1249	dREQ;	648	dREQ;
1250		649
1251	req->type = ix;	650	req->type = ix;
1252	req->fh = newSVsv (fh);	651	req->sv1 = newSVsv (fh);
1253	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	652	req->int1 = fd;
1254		653
1255	REQ_SEND (req);	654	REQ_SEND (req);
1256	}	655	}
1257		656
1258	void	657	void
		658	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		659	PROTOTYPE: $$$$;$
		660	PPCODE:
		661	{
		662	int fd = s_fileno_croak (fh, 0);
		663	dREQ;
		664
		665	req->type = EIO_SYNC_FILE_RANGE;
		666	req->sv1 = newSVsv (fh);
		667	req->int1 = fd;
		668	req->offs = offset;
		669	req->size = nbytes;
		670	req->int2 = flags;
		671
		672	REQ_SEND (req);
		673	}
		674
		675	void
		676	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		677	PROTOTYPE: $;$
		678	PPCODE:
		679	{
		680	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		681	int fd = s_fileno_croak (fh, 0);
		682	dREQ;
		683
		684	if (close_pipe < 0)
		685	{
		686	int pipefd [2];
		687
		688	if (pipe (pipefd) < 0
		689	|| close (pipefd [1]) < 0
		690	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		691	abort (); /*D*/
		692
		693	close_pipe = pipefd [0];
		694	}
		695
		696	req->type = EIO_DUP2;
		697	req->int1 = close_pipe;
		698	req->sv2 = newSVsv (fh);
		699	req->int2 = fd;
		700
		701	REQ_SEND (req);
		702	}
		703
		704	void
1259	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	705	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1260	SV * fh
1261	UV offset
1262	UV length
1263	SV * data
1264	UV dataoffset
1265	SV * callback
1266	ALIAS:	706	ALIAS:
1267	aio_read = REQ_READ	707	aio_read = EIO_READ
1268	aio_write = REQ_WRITE	708	aio_write = EIO_WRITE
1269	PROTOTYPE: $$$$$;$	709	PROTOTYPE: $$$$$;$
1270	PPCODE:	710	PPCODE:
1271	{	711	{
1272	aio_req req;
1273	STRLEN svlen;	712	STRLEN svlen;
		713	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1274	char *svptr = SvPVbyte (data, svlen);	714	char *svptr = SvPVbyte (data, svlen);
1275		715	UV len = SvUV (length);
1276	SvUPGRADE (data, SVt_PV);
1277	SvPOK_on (data);
1278		716
1279	if (dataoffset < 0)	717	if (dataoffset < 0)
1280	dataoffset += svlen;	718	dataoffset += svlen;
1281		719
1282	if (dataoffset < 0 || dataoffset > svlen)	720	if (dataoffset < 0 || dataoffset > svlen)
1283	croak ("data offset outside of string");	721	croak ("dataoffset outside of data scalar");
1284		722
1285	if (ix == REQ_WRITE)	723	if (ix == EIO_WRITE)
1286	{	724	{
1287	/* write: check length and adjust. */	725	/* write: check length and adjust. */
1288	if (length < 0 || length + dataoffset > svlen)	726	if (!SvOK (length) || len + dataoffset > svlen)
1289	length = svlen - dataoffset;	727	len = svlen - dataoffset;
1290	}	728	}
1291	else	729	else
1292	{	730	{
1293	/* read: grow scalar as necessary */	731	/* read: check type and grow scalar as necessary */
		732	SvUPGRADE (data, SVt_PV);
1294	svptr = SvGROW (data, length + dataoffset);	733	svptr = SvGROW (data, len + dataoffset + 1);
1295	}	734	}
1296
1297	if (length < 0)
1298	croak ("length must not be negative");
1299		735
1300	{	736	{
1301	dREQ;	737	dREQ;
1302		738
1303	req->type = ix;	739	req->type = ix;
1304	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
1305	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	741	req->int1 = fd;
1306	: IoOFP (sv_2io (fh)));	742	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1307	req->offset = offset;	743	req->size = len;
1308	req->length = length;
1309	req->data = SvREFCNT_inc (data);	744	req->sv2 = SvREFCNT_inc (data);
1310	req->dataptr = (char *)svptr + dataoffset;	745	req->ptr2 = (char *)svptr + dataoffset;
		746	req->stroffset = dataoffset;
1311		747
1312	if (!SvREADONLY (data))	748	if (!SvREADONLY (data))
1313	{	749	{
1314	SvREADONLY_on (data);	750	SvREADONLY_on (data);
1315	req->data2ptr = (void *)data;	751	req->flags |= FLAG_SV2_RO_OFF;
1316	}	752	}
1317		753
1318	REQ_SEND;	754	REQ_SEND;
1319	}	755	}
1320	}	756	}
1321		757
1322	void	758	void
		759	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		760	PROTOTYPE: $$;$
		761	PPCODE:
		762	{
		763	SV *data;
		764	dREQ;
		765
		766	req->type = EIO_READLINK;
		767	req->sv1 = newSVsv (path);
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769
		770	REQ_SEND;
		771	}
		772
		773	void
1323	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	774	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1324	SV * out_fh
1325	SV * in_fh
1326	UV in_offset
1327	UV length
1328	SV * callback
1329	PROTOTYPE: $$$$;$	775	PROTOTYPE: $$$$;$
1330	PPCODE:	776	PPCODE:
1331	{	777	{
		778	int ifd = s_fileno_croak (in_fh , 0);
		779	int ofd = s_fileno_croak (out_fh, 1);
1332	dREQ;	780	dREQ;
1333		781
1334	req->type = REQ_SENDFILE;	782	req->type = EIO_SENDFILE;
1335	req->fh = newSVsv (out_fh);	783	req->sv1 = newSVsv (out_fh);
1336	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	784	req->int1 = ofd;
1337	req->fh2 = newSVsv (in_fh);	785	req->sv2 = newSVsv (in_fh);
1338	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	786	req->int2 = ifd;
1339	req->offset = in_offset;	787	req->offs = in_offset;
1340	req->length = length;	788	req->size = length;
1341		789
1342	REQ_SEND;	790	REQ_SEND;
1343	}	791	}
1344		792
1345	void	793	void
1346	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	794	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1347	SV * fh
1348	UV offset
1349	IV length
1350	SV * callback
1351	PROTOTYPE: $$$;$	795	PROTOTYPE: $$$;$
1352	PPCODE:	796	PPCODE:
1353	{	797	{
		798	int fd = s_fileno_croak (fh, 0);
1354	dREQ;	799	dREQ;
1355		800
1356	req->type = REQ_READAHEAD;	801	req->type = EIO_READAHEAD;
1357	req->fh = newSVsv (fh);	802	req->sv1 = newSVsv (fh);
1358	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	803	req->int1 = fd;
1359	req->offset = offset;	804	req->offs = offset;
1360	req->length = length;	805	req->size = length;
1361		806
1362	REQ_SEND;	807	REQ_SEND;
1363	}	808	}
1364		809
1365	void	810	void
1366	aio_stat (fh_or_path,callback=&PL_sv_undef)	811	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1367	SV * fh_or_path
1368	SV * callback
1369	ALIAS:	812	ALIAS:
1370	aio_stat = REQ_STAT	813	aio_stat = EIO_STAT
1371	aio_lstat = REQ_LSTAT	814	aio_lstat = EIO_LSTAT
1372	PPCODE:	815	PPCODE:
1373	{	816	{
1374	dREQ;	817	dREQ;
1375		818
1376	New (0, req->statdata, 1, Stat_t);	819	req->sv1 = newSVsv (fh_or_path);
1377	if (!req->statdata)
1378	{
1379	req_free (req);
1380	croak ("out of memory during aio_req->statdata allocation");
1381	}
1382		820
1383	if (SvPOK (fh_or_path))	821	if (SvPOK (req->sv1))
1384	{	822	{
1385	req->type = ix;	823	req->type = ix;
1386	req->data = newSVsv (fh_or_path);
1387	req->dataptr = SvPVbyte_nolen (req->data);	824	req->ptr1 = SvPVbyte_nolen (req->sv1);
1388	}	825	}
1389	else	826	else
1390	{	827	{
1391	req->type = REQ_FSTAT;	828	req->type = EIO_FSTAT;
1392	req->fh = newSVsv (fh_or_path);
1393	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	829	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1394	}	830	}
1395		831
1396	REQ_SEND;	832	REQ_SEND;
1397	}	833	}
1398		834
1399	void	835	void
		836	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		837	PPCODE:
		838	{
		839	dREQ;
		840
		841	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		842	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		843	req->sv1 = newSVsv (fh_or_path);
		844
		845	if (SvPOK (req->sv1))
		846	{
		847	req->type = EIO_UTIME;
		848	req->ptr1 = SvPVbyte_nolen (req->sv1);
		849	}
		850	else
		851	{
		852	req->type = EIO_FUTIME;
		853	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		854	}
		855
		856	REQ_SEND;
		857	}
		858
		859	void
		860	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->sv1 = newSVsv (fh_or_path);
		866	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		867
		868	if (SvPOK (req->sv1))
		869	{
		870	req->type = EIO_TRUNCATE;
		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
		872	}
		873	else
		874	{
		875	req->type = EIO_FTRUNCATE;
		876	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		877	}
		878
		879	REQ_SEND;
		880	}
		881
		882	void
		883	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		884	ALIAS:
		885	aio_chmod = EIO_CHMOD
		886	aio_mkdir = EIO_MKDIR
		887	PPCODE:
		888	{
		889	dREQ;
		890
		891	req->int2 = mode;
		892	req->sv1 = newSVsv (fh_or_path);
		893
		894	if (SvPOK (req->sv1))
		895	{
		896	req->type = ix;
		897	req->ptr1 = SvPVbyte_nolen (req->sv1);
		898	}
		899	else
		900	{
		901	req->type = EIO_FCHMOD;
		902	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		903	}
		904
		905	REQ_SEND;
		906	}
		907
		908	void
		909	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		910	PPCODE:
		911	{
		912	dREQ;
		913
		914	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		915	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		916	req->sv1 = newSVsv (fh_or_path);
		917
		918	if (SvPOK (req->sv1))
		919	{
		920	req->type = EIO_CHOWN;
		921	req->ptr1 = SvPVbyte_nolen (req->sv1);
		922	}
		923	else
		924	{
		925	req->type = EIO_FCHOWN;
		926	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		927	}
		928
		929	REQ_SEND;
		930	}
		931
		932	void
		933	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		934	PPCODE:
		935	{
		936	dREQ;
		937
		938	req->type = EIO_READDIR;
		939	req->sv1 = newSVsv (pathname);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		942
		943	if (flags & EIO_READDIR_DENTS)
		944	req->int1 |= EIO_READDIR_CUSTOM2;
		945
		946	REQ_SEND;
		947	}
		948
		949	void
1400	aio_unlink (pathname,callback=&PL_sv_undef)	950	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1401	SV * pathname
1402	SV * callback
1403	ALIAS:	951	ALIAS:
1404	aio_unlink = REQ_UNLINK	952	aio_unlink = EIO_UNLINK
1405	aio_rmdir = REQ_RMDIR	953	aio_rmdir = EIO_RMDIR
1406	aio_readdir = REQ_READDIR	954	aio_readdir = EIO_READDIR
1407	PPCODE:	955	PPCODE:
1408	{	956	{
1409	dREQ;	957	dREQ;
1410		958
1411	req->type = ix;	959	req->type = ix;
1412	req->data = newSVsv (pathname);	960	req->sv1 = newSVsv (pathname);
1413	req->dataptr = SvPVbyte_nolen (req->data);	961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962
		963	REQ_SEND;
		964	}
		965
		966	void
		967	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		968	ALIAS:
		969	aio_link = EIO_LINK
		970	aio_symlink = EIO_SYMLINK
		971	aio_rename = EIO_RENAME
		972	PPCODE:
		973	{
		974	dREQ;
		975
		976	req->type = ix;
		977	req->sv1 = newSVsv (oldpath);
		978	req->ptr1 = SvPVbyte_nolen (req->sv1);
		979	req->sv2 = newSVsv (newpath);
		980	req->ptr2 = SvPVbyte_nolen (req->sv2);
1414		981
1415	REQ_SEND;	982	REQ_SEND;
1416	}	983	}
1417		984
1418	void	985	void
1419	aio_link (oldpath,newpath,callback=&PL_sv_undef)	986	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1420	SV * oldpath
1421	SV * newpath
1422	SV * callback
1423	ALIAS:
1424	aio_link = REQ_LINK
1425	aio_symlink = REQ_SYMLINK
1426	aio_rename = REQ_RENAME
1427	PPCODE:	987	PPCODE:
1428	{	988	{
1429	dREQ;	989	dREQ;
1430		990
1431	req->type = ix;	991	req->type = EIO_MKNOD;
1432	req->fh = newSVsv (oldpath);	992	req->sv1 = newSVsv (pathname);
1433	req->data2ptr = SvPVbyte_nolen (req->fh);	993	req->ptr1 = SvPVbyte_nolen (req->sv1);
1434	req->data = newSVsv (newpath);	994	req->int2 = (mode_t)mode;
1435	req->dataptr = SvPVbyte_nolen (req->data);	995	req->offs = dev;
1436		996
1437	REQ_SEND;	997	REQ_SEND;
1438	}	998	}
1439		999
1440	void	1000	void
1441	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1001	aio_busy (double delay, SV *callback=&PL_sv_undef)
1442	SV * pathname
1443	SV * callback
1444	UV mode
1445	UV dev
1446	PPCODE:	1002	PPCODE:
1447	{	1003	{
1448	dREQ;	1004	dREQ;
1449		1005
1450	req->type = REQ_MKNOD;	1006	req->type = EIO_BUSY;
1451	req->data = newSVsv (pathname);	1007	req->nv1 = delay < 0. ? 0. : delay;
1452	req->dataptr = SvPVbyte_nolen (req->data);	1008
1453	req->mode = (mode_t)mode;
1454	req->offset = dev;
1455
1456	REQ_SEND;	1009	REQ_SEND;
1457	}	1010	}
1458		1011
1459	void	1012	void
1460	aio_busy (delay,callback=&PL_sv_undef)
1461	double delay
1462	SV * callback
1463	PPCODE:
1464	{
1465	dREQ;
1466
1467	req->type = REQ_BUSY;
1468	req->fd = delay < 0. ? 0 : delay;
1469	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1470
1471	REQ_SEND;
1472	}
1473
1474	void
1475	aio_group (callback=&PL_sv_undef)	1013	aio_group (SV *callback=&PL_sv_undef)
1476	SV * callback
1477	PROTOTYPE: ;$	1014	PROTOTYPE: ;$
1478	PPCODE:	1015	PPCODE:
1479	{	1016	{
1480	dREQ;	1017	dREQ;
1481		1018
1482	req->type = REQ_GROUP;	1019	req->type = EIO_GROUP;
		1020
1483	req_send (req);	1021	req_submit (req);
1484
1485	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1022	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1486	}	1023	}
1487		1024
1488	void	1025	void
1489	aio_nop (callback=&PL_sv_undef)	1026	aio_nop (SV *callback=&PL_sv_undef)
1490	SV * callback	1027	ALIAS:
		1028	aio_nop = EIO_NOP
		1029	aio_sync = EIO_SYNC
1491	PPCODE:	1030	PPCODE:
1492	{	1031	{
1493	dREQ;	1032	dREQ;
1494		1033
1495	req->type = REQ_NOP;	1034	req->type = ix;
1496		1035
1497	REQ_SEND;	1036	REQ_SEND;
1498	}	1037	}
1499		1038
1500	int	1039	int
1501	aioreq_pri (int pri = 0)	1040	aioreq_pri (int pri = 0)
1502	PROTOTYPE: ;$	1041	PROTOTYPE: ;$
1503	CODE:	1042	CODE:
1504	RETVAL = next_pri - PRI_BIAS;	1043	RETVAL = next_pri;
1505	if (items > 0)	1044	if (items > 0)
1506	{	1045	{
1507	if (pri < PRI_MIN) pri = PRI_MIN;	1046	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1508	if (pri > PRI_MAX) pri = PRI_MAX;	1047	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1509	next_pri = pri + PRI_BIAS;	1048	next_pri = pri;
1510	}	1049	}
1511	OUTPUT:	1050	OUTPUT:
1512	RETVAL	1051	RETVAL
1513		1052
1514	void	1053	void
1515	aioreq_nice (int nice = 0)	1054	aioreq_nice (int nice = 0)
1516	CODE:	1055	CODE:
1517	nice = next_pri - nice;	1056	nice = next_pri - nice;
1518	if (nice < PRI_MIN) nice = PRI_MIN;	1057	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1519	if (nice > PRI_MAX) nice = PRI_MAX;	1058	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1520	next_pri = nice + PRI_BIAS;	1059	next_pri = nice;
1521		1060
1522	void	1061	void
1523	flush ()	1062	flush ()
1524	PROTOTYPE:	1063	PROTOTYPE:
1525	CODE:	1064	CODE:
1526	while (nreqs)	1065	while (eio_nreqs ())
1527	{	1066	{
1528	poll_wait ();	1067	poll_wait ();
1529	poll_cb (0);	1068	poll_cb ();
1530	}	1069	}
1531		1070
1532	void	1071	int
1533	poll()	1072	poll()
1534	PROTOTYPE:	1073	PROTOTYPE:
1535	CODE:	1074	CODE:
1536	if (nreqs)
1537	{
1538	poll_wait ();	1075	poll_wait ();
1539	poll_cb (0);	1076	RETVAL = poll_cb ();
1540	}	1077	OUTPUT:
		1078	RETVAL
1541		1079
1542	int	1080	int
1543	poll_fileno()	1081	poll_fileno()
1544	PROTOTYPE:	1082	PROTOTYPE:
1545	CODE:	1083	CODE:
1546	RETVAL = respipe [0];	1084	RETVAL = s_epipe_fd (&respipe);
1547	OUTPUT:	1085	OUTPUT:
1548	RETVAL	1086	RETVAL
1549		1087
1550	int	1088	int
1551	poll_cb(...)	1089	poll_cb(...)
1552	PROTOTYPE:	1090	PROTOTYPE:
1553	CODE:	1091	CODE:
1554	RETVAL = poll_cb (0);	1092	RETVAL = poll_cb ();
1555	OUTPUT:	1093	OUTPUT:
1556	RETVAL	1094	RETVAL
1557		1095
1558	int
1559	poll_some(int max = 0)
1560	PROTOTYPE: $
1561	CODE:
1562	RETVAL = poll_cb (max);
1563	OUTPUT:
1564	RETVAL
1565
1566	void	1096	void
1567	poll_wait()	1097	poll_wait()
1568	PROTOTYPE:	1098	PROTOTYPE:
1569	CODE:	1099	CODE:
1570	if (nreqs)
1571	poll_wait ();	1100	poll_wait ();
1572		1101
1573	int	1102	int
1574	nreqs()	1103	nreqs()
1575	PROTOTYPE:	1104	PROTOTYPE:
1576	CODE:	1105	CODE:
1577	RETVAL = nreqs;	1106	RETVAL = eio_nreqs ();
1578	OUTPUT:	1107	OUTPUT:
1579	RETVAL	1108	RETVAL
1580		1109
1581	int	1110	int
1582	nready()	1111	nready()
1583	PROTOTYPE:	1112	PROTOTYPE:
1584	CODE:	1113	CODE:
1585	RETVAL = get_nready ();	1114	RETVAL = eio_nready ();
1586	OUTPUT:	1115	OUTPUT:
1587	RETVAL	1116	RETVAL
1588		1117
1589	int	1118	int
1590	npending()	1119	npending()
1591	PROTOTYPE:	1120	PROTOTYPE:
1592	CODE:	1121	CODE:
1593	RETVAL = get_npending ();	1122	RETVAL = eio_npending ();
1594	OUTPUT:	1123	OUTPUT:
1595	RETVAL	1124	RETVAL
1596		1125
		1126	int
		1127	nthreads()
		1128	PROTOTYPE:
		1129	CODE:
		1130	RETVAL = eio_nthreads ();
		1131	OUTPUT:
		1132	RETVAL
		1133
		1134	int
		1135	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1136	PROTOTYPE: $$$$
		1137	CODE:
		1138	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1139	RETVAL = posix_fadvise (fh, offset, length, advice);
		1140	#else
		1141	RETVAL = errno = ENOSYS;
		1142	#endif
		1143	OUTPUT:
		1144	RETVAL
		1145
		1146	ssize_t
		1147	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1148	PROTOTYPE: $$$$
		1149	CODE:
		1150	eio_sendfile_sync (ofh, ifh, offset, count);
		1151
		1152	void _on_next_submit (SV *cb)
		1153	CODE:
		1154	SvREFCNT_dec (on_next_submit);
		1155	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1156
1597	PROTOTYPES: DISABLE	1157	PROTOTYPES: DISABLE
1598		1158
1599	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1159	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1600		1160
1601	void	1161	void
1602	cancel (aio_req_ornot req)	1162	cancel (aio_req_ornot req)
1603	CODE:	1163	CODE:
1604	req_cancel (req);	1164	eio_cancel (req);
1605		1165
1606	void	1166	void
1607	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1167	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1608	CODE:	1168	PPCODE:
		1169	{
		1170	if (GIMME_V != G_VOID)
		1171	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1172
		1173	if (items > 1)
		1174	{
		1175	SV *cb_cv =get_cb (callback);
		1176
1609	SvREFCNT_dec (req->callback);	1177	SvREFCNT_dec (req->callback);
1610	req->callback = newSVsv (callback);	1178	req->callback = SvREFCNT_inc (cb_cv);
		1179	}
		1180	}
1611		1181
1612	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1182	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1613		1183
1614	void	1184	void
1615	add (aio_req grp, ...)	1185	add (aio_req grp, ...)
1616	PPCODE:	1186	PPCODE:
1617	{	1187	{
1618	int i;	1188	int i;
1619	aio_req req;
1620		1189
1621	if (grp->fd == 2)	1190	if (grp->int1 == 2)
1622	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1191	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1623		1192
1624	for (i = 1; i < items; ++i )	1193	for (i = 1; i < items; ++i )
1625	{	1194	{
		1195	aio_req req;
		1196
1626	if (GIMME_V != G_VOID)	1197	if (GIMME_V != G_VOID)
1627	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1198	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1628		1199
1629	req = SvAIO_REQ (ST (i));	1200	req = SvAIO_REQ (ST (i));
1630		1201
1631	if (req)	1202	if (req)
1632	{	1203	eio_grp_add (grp, req);
1633	++grp->length;
1634	req->grp = grp;
1635
1636	req->grp_prev = 0;
1637	req->grp_next = grp->grp_first;
1638
1639	if (grp->grp_first)
1640	grp->grp_first->grp_prev = req;
1641
1642	grp->grp_first = req;
1643	}
1644	}	1204	}
1645	}	1205	}
1646		1206
1647	void	1207	void
1648	cancel_subs (aio_req_ornot req)	1208	cancel_subs (aio_req_ornot req)
…		…
1657	AV *av;	1217	AV *av;
1658		1218
1659	grp->errorno = errno;	1219	grp->errorno = errno;
1660		1220
1661	av = newAV ();	1221	av = newAV ();
		1222	av_extend (av, items - 1);
1662		1223
1663	for (i = 1; i < items; ++i )	1224	for (i = 1; i < items; ++i )
1664	av_push (av, newSVsv (ST (i)));	1225	av_push (av, newSVsv (ST (i)));
1665		1226
1666	SvREFCNT_dec (grp->data);	1227	SvREFCNT_dec (grp->sv1);
1667	grp->data = (SV *)av;	1228	grp->sv1 = (SV *)av;
1668	}	1229	}
1669		1230
1670	void	1231	void
1671	errno (aio_req grp, int errorno = errno)	1232	errno (aio_req grp, int errorno = errno)
1672	CODE:	1233	CODE:
1673	grp->errorno = errorno;	1234	grp->errorno = errorno;
1674		1235
1675	void	1236	void
1676	limit (aio_req grp, int limit)	1237	limit (aio_req grp, int limit)
1677	CODE:	1238	CODE:
1678	grp->fd2 = limit;	1239	eio_grp_limit (grp, limit);
1679	aio_grp_feed (grp);
1680		1240
1681	void	1241	void
1682	feed (aio_req grp, SV *callback=&PL_sv_undef)	1242	feed (aio_req grp, SV *callback=&PL_sv_undef)
1683	CODE:	1243	CODE:
1684	{	1244	{
1685	SvREFCNT_dec (grp->fh2);	1245	SvREFCNT_dec (grp->sv2);
1686	grp->fh2 = newSVsv (callback);	1246	grp->sv2 = newSVsv (callback);
		1247	grp->feed = aio_grp_feed;
1687		1248
1688	if (grp->fd2 <= 0)	1249	if (grp->int2 <= 0)
1689	grp->fd2 = 2;	1250	grp->int2 = 2;
1690		1251
1691	aio_grp_feed (grp);	1252	eio_grp_limit (grp, grp->int2);
1692	}	1253	}
1693		1254

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