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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.84 by root, Sat Oct 28 01:24:19 2006 UTC vs.
Revision 1.154 by root, Wed Jul 15 01:39:15 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	/* number of seconds after which idle threads exit */	72	/* perl stupidly overrides readdir and maybe others */
49	#define IDLE_TIMEOUT 10	73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
50		77
51	/* used for struct dirent, AIX doesn't provide it */	78	#define EIO_STRUCT_STAT Stat_t
52	#ifndef NAME_MAX	79
53	# define NAME_MAX 4096	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
54	#endif	89	#endif
55		90
56	#ifndef PTHREAD_STACK_MIN	91	/*****************************************************************************/
57	/* care for broken platforms, e.g. windows */	92
58	# 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)
59	#endif	97	#endif
60		98
61	#if __ia64	99	#define expect_false(expr) expect ((expr) != 0, 0)
62	# define STACKSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68		101
69	/* wether word reads are potentially non-atomic.	102	/*****************************************************************************/
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDREAD_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDREAD_UNSAFE 0
76	# else
77	# define WORDREAD_UNSAFE 1
78	# endif
79	#endif
80		103
81	/* buffer size for various temporary buffers */	104	static HV *stash;
82	#define AIO_BUFSIZE 65536	105	typedef SV SV8; /* byte-sv, used for argument-checking */
83		106	typedef int aio_rfd; /* read file desriptor */
84	#define dBUF \	107	typedef int aio_wfd; /* write file descriptor */
85	char *aio_buf; \
86	LOCK (wrklock); \
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91
92	enum {
93	REQ_QUIT,
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};
105		108
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		111
109	typedef struct aio_cb	112	#define EIO_REQ_MEMBERS \
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;	113	SV *callback; \
114	SV *fh, *fh2;	114	SV *sv1, *sv2; \
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;	115	STRLEN stroffset; \
122	int type;	116	SV *self;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126		117
127	unsigned char flags;	118	#define EIO_NO_WRAPPERS 1
128	unsigned char pri;
129		119
130	SV *self; /* the perl counterpart of this request, if any */	120	#include "libeio/eio.h"
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	121
132	} 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)
133		151
134	enum {	152	enum {
135	FLAG_CANCELLED = 0x01,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
136	};	154	};
137		155
		156	#include "libeio/eio.c"
		157
138	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	159	typedef eio_req *aio_req_ornot;
140		160
141	enum {	161	static SV *on_next_submit;
142	PRI_MIN = -4,	162	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	163	static int max_outstanding;
144		164
145	DEFAULT_PRI = 0,	165	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		166
150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
151
152	static unsigned int started, idle, wanted;
153
154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156	#else
157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158	#endif
159
160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163	/* worker threads management */
164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166	typedef struct worker {
167	/* locked by wrklock */
168	struct worker *prev, *next;
169
170	pthread_t tid;
171
172	/* locked by reslock, reqlock or wrklock */
173	aio_req req; /* currently processed request */
174	void *dbuf;
175	DIR *dirp;
176	} worker;
177
178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180	static void worker_clear (worker *wrk)
181	{
182	if (wrk->dirp)
183	{
184	closedir (wrk->dirp);
185	wrk->dirp = 0;
186	}
187
188	if (wrk->dbuf)
189	{
190	free (wrk->dbuf);
191	wrk->dbuf = 0;
192	}
193	}
194
195	static void worker_free (worker *wrk)
196	{
197	wrk->next->prev = wrk->prev;
198	wrk->prev->next = wrk->next;
199
200	free (wrk);
201	}
202
203	static volatile unsigned int nreqs, nready, npending;
204	static volatile unsigned int max_idle = 4;
205	static volatile unsigned int max_outstanding = 0xffffffff;
206	static int respipe [2];
207
208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
211
212	#if WORDREAD_UNSAFE
213
214	static unsigned int get_nready ()
215	{
216	unsigned int retval;
217
218	LOCK (reqlock);
219	retval = nready;
220	UNLOCK (reqlock);
221
222	return retval;
223	}
224
225	static unsigned int get_npending ()
226	{
227	unsigned int retval;
228
229	LOCK (reslock);
230	retval = npending;
231	UNLOCK (reslock);
232
233	return retval;
234	}
235
236	#else
237
238	# define get_nready() nready
239	# define get_npending() npending
240
241	#endif
242
243	/*
244	* a somewhat faster data structure might be nice, but
245	* with 8 priorities this actually needs <20 insns
246	* per shift, the most expensive operation.
247	*/
248	typedef struct {
249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
250	int size;
251	} reqq;
252
253	static reqq req_queue;
254	static reqq res_queue;
255
256	int reqq_push (reqq *q, aio_req req)
257	{
258	int pri = req->pri;
259	req->next = 0;
260
261	if (q->qe[pri])
262	{
263	q->qe[pri]->next = req;
264	q->qe[pri] = req;
265	}
266	else
267	q->qe[pri] = q->qs[pri] = req;
268
269	return q->size++;
270	}
271
272	aio_req reqq_shift (reqq *q)
273	{
274	int pri;
275
276	if (!q->size)
277	return 0;
278
279	--q->size;
280
281	for (pri = NUM_PRI; pri--; )
282	{
283	aio_req req = q->qs[pri];
284
285	if (req)
286	{
287	if (!(q->qs[pri] = req->next))
288	q->qe[pri] = 0;
289
290	return req;
291	}
292	}
293
294	abort ();
295	}
296
297	static int poll_cb (int max);
298	static void req_invoke (aio_req req);
299	static void req_free (aio_req req);	167	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	168	static void req_cancel (aio_req req);
		169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	s_epipe_signal (&respipe);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	s_epipe_drain (&respipe);
		180	}
301		181
302	/* must be called at most once */	182	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	183	static SV *req_sv (aio_req req, const char *klass)
304	{	184	{
305	if (!req->self)	185	if (!req->self)
…		…
323	return mg ? (aio_req)mg->mg_ptr : 0;	203	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	204	}
325		205
326	static void aio_grp_feed (aio_req grp)	206	static void aio_grp_feed (aio_req grp)
327	{	207	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	208	if (grp->sv2 && SvOK (grp->sv2))
329	{	209	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	210	dSP;
335		211
336	ENTER;	212	ENTER;
337	SAVETMPS;	213	SAVETMPS;
338	PUSHMARK (SP);	214	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
340	PUTBACK;	216	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	218	SPAGAIN;
343	FREETMPS;	219	FREETMPS;
344	LEAVE;	220	LEAVE;
345	}
346
347	/* stop if no progress has been made */
348	if (old_len == grp->length)
349	{
350	SvREFCNT_dec (grp->fh2);
351	grp->fh2 = 0;
352	break;
353	}
354	}	221	}
355	}	222	}
356		223
357	static void aio_grp_dec (aio_req grp)	224	static void req_submit (eio_req *req)
358	{	225	{
359	--grp->length;	226	eio_submit (req);
360		227
361	/* call feeder, if applicable */	228	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	229	{
367	req_invoke (grp);	230	dSP;
368	req_free (grp);	231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
369	}	238	}
370	}	239	}
371		240
372	static void req_invoke (aio_req req)	241	static int req_invoke (eio_req *req)
373	{	242	{
374	dSP;	243	dSP;
375		244
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
		247
		248	if (!EIO_CANCELLED (req) && req->callback)
377	{	249	{
378	ENTER;	250	ENTER;
379	SAVETMPS;	251	SAVETMPS;
380	PUSHMARK (SP);	252	PUSHMARK (SP);
381	EXTEND (SP, 1);	253	EXTEND (SP, 1);
382		254
383	switch (req->type)	255	switch (req->type)
384	{	256	{
385	case REQ_READDIR:	257	case EIO_READDIR:
386	{	258	{
387	SV *rv = &PL_sv_undef;	259	SV *rv = &PL_sv_undef;
388		260
389	if (req->result >= 0)	261	if (req->result >= 0)
390	{	262	{
391	int i;	263	int i;
392	char *buf = req->data2ptr;	264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	266	AV *av = newAV ();
394		267
395	av_extend (av, req->result - 1);	268	av_extend (av, req->result - 1);
396		269
397	for (i = 0; i < req->result; ++i)	270	for (i = 0; i < req->result; ++i)
398	{	271	{
399	SV *sv = newSVpv (buf, 0);	272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
401	av_store (av, i, sv);	296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
402	buf += SvCUR (sv) + 1;	304	names += SvCUR (name) + 1;
		305	}
403	}	306	}
404		307
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	308	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	309	}
407		310
408	PUSHs (rv);	311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
409	}	315	}
410	break;	316	break;
411		317
412	case REQ_OPEN:	318	case EIO_OPEN:
413	{	319	{
414	/* convert fd to fh */	320	/* convert fd to fh */
415	SV *fh;	321	SV *fh = &PL_sv_undef;
416		322
417	PUSHs (sv_2mortal (newSViv (req->result)));	323	if (req->result >= 0)
418	PUTBACK;	324	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	325	GV *gv = (GV *)sv_newmortal ();
420	SPAGAIN;	326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
421		332
422	fh = SvREFCNT_inc (POPs);	333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
423		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
424	PUSHMARK (SP);	345	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	346	}
427	break;	347	break;
428		348
429	case REQ_GROUP:	349	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	350	req->int1 = 2; /* mark group as finished */
431		351
432	if (req->data)	352	if (req->sv1)
433	{	353	{
434	int i;	354	int i;
435	AV *av = (AV *)req->data;	355	AV *av = (AV *)req->sv1;
436		356
437	EXTEND (SP, AvFILL (av) + 1);	357	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	358	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	359	PUSHs (*av_fetch (av, i, 0));
440	}	360	}
441	break;	361	break;
442		362
443	case REQ_NOP:	363	case EIO_NOP:
444	case REQ_BUSY:	364	case EIO_BUSY:
445	break;	365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
		382	{
		383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		384	*SvEND (req->sv2) = 0;
		385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
446		395
447	default:	396	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	397	PUSHs (sv_2mortal (newSViv (req->result)));
449	break;	398	break;
450	}	399	}
451		400
452	errno = req->errorno;	401	errno = req->errorno;
453		402
454	PUTBACK;	403	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	405	SPAGAIN;
457		406
458	FREETMPS;	407	FREETMPS;
459	LEAVE;	408	LEAVE;
		409
		410	PUTBACK;
460	}	411	}
461		412
462	if (req->grp)	413	return !!SvTRUE (ERRSV);
463	{
464	aio_req grp = req->grp;
465
466	/* unlink request */
467	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
469
470	if (grp->grp_first == req)
471	grp->grp_first = req->grp_next;
472
473	aio_grp_dec (grp);
474	}
475
476	if (SvTRUE (ERRSV))
477	{
478	req_free (req);
479	croak (0);
480	}
481	}	414	}
482		415
483	static void req_free (aio_req req)	416	static void req_destroy (aio_req req)
484	{	417	{
485	if (req->self)	418	if (req->self)
486	{	419	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	420	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	421	SvREFCNT_dec (req->self);
489	}	422	}
490		423
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	424	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	425	SvREFCNT_dec (req->sv2);
494	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499		427
500	Safefree (req);	428	Safefree (req);
501	}	429	}
502		430
503	static void req_cancel_subs (aio_req grp)	431	static void req_cancel_subs (aio_req grp)
504	{	432	{
505	aio_req sub;	433	aio_req sub;
506		434
507	if (grp->type != REQ_GROUP)	435	if (grp->type != EIO_GROUP)
508	return;	436	return;
509		437
510	SvREFCNT_dec (grp->fh2);	438	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	439	grp->sv2 = 0;
512		440
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	441	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	442	}
516		443
517	static void req_cancel (aio_req req)	444	static void
		445	create_respipe (void)
518	{	446	{
519	req->flags |= FLAG_CANCELLED;	447	if (s_epipe_renew (&respipe))
520		448	croak ("unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	449	}
523		450
524	static void *aio_proc(void *arg);
525
526	static void start_thread (void)
527	{
528	sigset_t fullsigset, oldsigset;
529	pthread_attr_t attr;
530
531	worker *wrk = calloc (1, sizeof (worker));
532
533	if (!wrk)
534	croak ("unable to allocate worker thread data");
535
536	pthread_attr_init (&attr);
537	pthread_attr_setstacksize (&attr, STACKSIZE);
538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
539	#ifdef PTHREAD_SCOPE_PROCESS
540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
541	#endif
542
543	sigfillset (&fullsigset);
544
545	LOCK (wrklock);
546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
547
548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
549	{
550	wrk->prev = &wrk_first;
551	wrk->next = wrk_first.next;
552	wrk_first.next->prev = wrk;
553	wrk_first.next = wrk;
554	++started;
555	}
556	else
557	free (wrk);
558
559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
560	UNLOCK (wrklock);
561	}
562
563	static void maybe_start_thread ()
564	{
565	if (started >= wanted)
566	return;
567
568	/* todo: maybe use idle here, but might be less exact */
569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
570	return;
571
572	start_thread ();
573	}
574
575	static void req_send (aio_req req)
576	{
577	++nreqs;
578
579	LOCK (reqlock);
580	++nready;
581	reqq_push (&req_queue, req);
582	pthread_cond_signal (&reqwait);
583	UNLOCK (reqlock);
584
585	maybe_start_thread ();
586	}
587
588	static void end_thread (void)
589	{
590	aio_req req;
591
592	Newz (0, req, 1, aio_cb);
593
594	req->type = REQ_QUIT;
595	req->pri = PRI_MAX + PRI_BIAS;
596
597	LOCK (reqlock);
598	reqq_push (&req_queue, req);
599	pthread_cond_signal (&reqwait);
600	UNLOCK (reqlock);
601
602	LOCK (wrklock);
603	--started;
604	UNLOCK (wrklock);
605	}
606
607	static void min_parallel (int nthreads)
608	{
609	if (wanted < nthreads)
610	wanted = nthreads;
611	}
612
613	static void max_parallel (int nthreads)
614	{
615	if (wanted > nthreads)
616	wanted = nthreads;
617
618	while (started > wanted)
619	end_thread ();
620	}
621
622	static void poll_wait ()	451	static void poll_wait (void)
623	{	452	{
624	fd_set rfd;
625
626	while (nreqs)	453	while (eio_nreqs ())
627	{	454	{
628	int size;	455	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	456
		457	X_LOCK (reslock);
630	size = res_queue.size;	458	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	459	X_UNLOCK (reslock);
632		460
633	if (size)	461	if (size)
634	return;	462	return;
635		463
636	maybe_start_thread ();	464	etp_maybe_start_thread ();
637		465
638	FD_ZERO(&rfd);	466	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	467	}
643	}	468	}
644		469
645	static int poll_cb (int max)	470	static int poll_cb (void)
646	{	471	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	472	for (;;)
653	{	473	{
654	while (max <= 0 || count < max)	474	int res = eio_poll ();
655	{
656	maybe_start_thread ();
657		475
658	LOCK (reslock);	476	if (res > 0)
659	req = reqq_shift (&res_queue);
660
661	if (req)
662	{
663	--npending;
664
665	if (!res_queue.size)
666	{
667	/* read any signals sent by the worker threads */
668	char buf [32];
669	while (read (respipe [0], buf, 32) == 32)
670	;
671	}
672	}
673
674	UNLOCK (reslock);
675
676	if (!req)
677	break;
678
679	--nreqs;
680
681	if (req->type == REQ_GROUP && req->length)
682	{
683	req->fd = 1; /* mark request as delayed */
684	continue;
685	}
686	else
687	{
688	if (req->type == REQ_READ)
689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
690
691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
692	SvREADONLY_off (req->data);
693
694	if (req->statdata)
695	{
696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
697	PL_laststatval = req->result;
698	PL_statcache = *(req->statdata);
699	}
700
701	req_invoke (req);
702
703	count++;
704	}
705
706	req_free (req);
707	}
708
709	if (nreqs <= max_outstanding)
710	break;	477	croak (0);
		478
		479	if (!max_outstanding || max_outstanding > eio_nreqs ())
		480	return res;
711		481
712	poll_wait ();	482	poll_wait ();
713
714	max = 0;
715	}	483	}
716
717	return count;
718	}
719
720	static void create_pipe ()
721	{
722	if (pipe (respipe))
723	croak ("unable to initialize result pipe");
724
725	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
726	croak ("cannot set result pipe to nonblocking mode");
727
728	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
729	croak ("cannot set result pipe to nonblocking mode");
730	}
731
732	/*****************************************************************************/
733	/* work around various missing functions */
734
735	#if !HAVE_PREADWRITE
736	# define pread aio_pread
737	# define pwrite aio_pwrite
738
739	/*
740	* make our pread/pwrite safe against themselves, but not against
741	* normal read/write by using a mutex. slows down execution a lot,
742	* but that's your problem, not mine.
743	*/
744	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
745
746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
747	{
748	ssize_t res;
749	off_t ooffset;
750
751	LOCK (preadwritelock);
752	ooffset = lseek (fd, 0, SEEK_CUR);
753	lseek (fd, offset, SEEK_SET);
754	res = read (fd, buf, count);
755	lseek (fd, ooffset, SEEK_SET);
756	UNLOCK (preadwritelock);
757
758	return res;
759	}
760
761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = write (fd, buf, count);
770	lseek (fd, offset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775	#endif
776
777	#if !HAVE_FDATASYNC
778	# define fdatasync fsync
779	#endif
780
781	#if !HAVE_READAHEAD
782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
783
784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
785	{
786	dBUF;
787
788	while (count > 0)
789	{
790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
791
792	pread (fd, aio_buf, len, offset);
793	offset += len;
794	count -= len;
795	}
796
797	errno = 0;
798	}
799
800	#endif
801
802	#if !HAVE_READDIR_R
803	# define readdir_r aio_readdir_r
804
805	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
806
807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
808	{
809	struct dirent *e;
810	int errorno;
811
812	LOCK (readdirlock);
813
814	e = readdir (dirp);
815	errorno = errno;
816
817	if (e)
818	{
819	*res = ent;
820	strcpy (ent->d_name, e->d_name);
821	}
822	else
823	*res = 0;
824
825	UNLOCK (readdirlock);
826
827	errno = errorno;
828	return e ? 0 : -1;
829	}
830	#endif
831
832	/* sendfile always needs emulation */
833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
834	{
835	ssize_t res;
836
837	if (!count)
838	return 0;
839
840	#if HAVE_SENDFILE
841	# if __linux
842	res = sendfile (ofd, ifd, &offset, count);
843
844	# elif __freebsd
845	/*
846	* Of course, the freebsd sendfile is a dire hack with no thoughts
847	* wasted on making it similar to other I/O functions.
848	*/
849	{
850	off_t sbytes;
851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853	if (res < 0 && sbytes)
854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855	res = sbytes;
856	}
857
858	# elif __hpux
859	res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861	# elif __solaris
862	{
863	struct sendfilevec vec;
864	size_t sbytes;
865
866	vec.sfv_fd = ifd;
867	vec.sfv_flag = 0;
868	vec.sfv_off = offset;
869	vec.sfv_len = count;
870
871	res = sendfilev (ofd, &vec, 1, &sbytes);
872
873	if (res < 0 && sbytes)
874	res = sbytes;
875	}
876
877	# endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882
883	if (res < 0
884	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885	#if __solaris
886	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
887	#endif
888	)
889	)
890	{
891	/* emulate sendfile. this is a major pain in the ass */
892	dBUF;
893
894	res = 0;
895
896	while (count)
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901
902	if (cnt <= 0)
903	{
904	if (cnt && !res) res = -1;
905	break;
906	}
907
908	cnt = write (ofd, aio_buf, cnt);
909
910	if (cnt <= 0)
911	{
912	if (cnt && !res) res = -1;
913	break;
914	}
915
916	offset += cnt;
917	res += cnt;
918	count -= cnt;
919	}
920	}
921
922	return res;
923	}
924
925	/* read a full directory */
926	static void scandir_ (aio_req req, worker *self)
927	{
928	DIR *dirp;
929	union
930	{
931	struct dirent d;
932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
933	} *u;
934	struct dirent *entp;
935	char *name, *names;
936	int memlen = 4096;
937	int memofs = 0;
938	int res = 0;
939	int errorno;
940
941	LOCK (wrklock);
942	self->dirp = dirp = opendir (req->dataptr);
943	self->dbuf = u = malloc (sizeof (*u));
944	req->data2ptr = names = malloc (memlen);
945	UNLOCK (wrklock);
946
947	if (dirp && u && names)
948	for (;;)
949	{
950	errno = 0;
951	readdir_r (dirp, &u->d, &entp);
952
953	if (!entp)
954	break;
955
956	name = entp->d_name;
957
958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
959	{
960	int len = strlen (name) + 1;
961
962	res++;
963
964	while (memofs + len > memlen)
965	{
966	memlen *= 2;
967	LOCK (wrklock);
968	req->data2ptr = names = realloc (names, memlen);
969	UNLOCK (wrklock);
970
971	if (!names)
972	break;
973	}
974
975	memcpy (names + memofs, name, len);
976	memofs += len;
977	}
978	}
979
980	if (errno)
981	res = -1;
982
983	req->result = res;
984	}
985
986	/*****************************************************************************/
987
988	static void *aio_proc (void *thr_arg)
989	{
990	aio_req req;
991	struct timespec ts;
992	worker *self = (worker *)thr_arg;
993
994	/* try to distribute timeouts somewhat evenly */
995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
996	* (1000000000UL / 1024UL);
997
998	for (;;)
999	{
1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1001
1002	LOCK (reqlock);
1003
1004	for (;;)
1005	{
1006	self->req = req = reqq_shift (&req_queue);
1007
1008	if (req)
1009	break;
1010
1011	++idle;
1012
1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1014	== ETIMEDOUT)
1015	{
1016	if (idle > max_idle)
1017	{
1018	--idle;
1019	UNLOCK (reqlock);
1020	LOCK (wrklock);
1021	--started;
1022	UNLOCK (wrklock);
1023	goto quit;
1024	}
1025
1026	/* we are allowed to idle, so do so without any timeout */
1027	pthread_cond_wait (&reqwait, &reqlock);
1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1029	}
1030
1031	--idle;
1032	}
1033
1034	--nready;
1035
1036	UNLOCK (reqlock);
1037
1038	errno = 0; /* strictly unnecessary */
1039
1040	if (!(req->flags & FLAG_CANCELLED))
1041	switch (req->type)
1042	{
1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1045
1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1048
1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1052
1053	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1054	case REQ_CLOSE: req->result = close (req->fd); break;
1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1061
1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
1064	case REQ_READDIR: scandir_ (req, self); break;
1065
1066	case REQ_BUSY:
1067	{
1068	struct timeval tv;
1069
1070	tv.tv_sec = req->fd;
1071	tv.tv_usec = req->fd2;
1072
1073	req->result = select (0, 0, 0, 0, &tv);
1074	}
1075
1076	case REQ_GROUP:
1077	case REQ_NOP:
1078	break;
1079
1080	case REQ_QUIT:
1081	goto quit;
1082
1083	default:
1084	req->result = ENOSYS;
1085	break;
1086	}
1087
1088	req->errorno = errno;
1089
1090	LOCK (reslock);
1091
1092	++npending;
1093
1094	if (!reqq_push (&res_queue, req))
1095	/* write a dummy byte to the pipe so fh becomes ready */
1096	write (respipe [1], &respipe, 1);
1097
1098	self->req = 0;
1099	worker_clear (self);
1100
1101	UNLOCK (reslock);
1102	}
1103
1104	quit:
1105	LOCK (wrklock);
1106	worker_free (self);
1107	UNLOCK (wrklock);
1108
1109	return 0;
1110	}
1111
1112	/*****************************************************************************/
1113
1114	static void atfork_prepare (void)
1115	{
1116	LOCK (wrklock);
1117	LOCK (reqlock);
1118	LOCK (reslock);
1119	#if !HAVE_PREADWRITE
1120	LOCK (preadwritelock);
1121	#endif
1122	#if !HAVE_READDIR_R
1123	LOCK (readdirlock);
1124	#endif
1125	}
1126
1127	static void atfork_parent (void)
1128	{
1129	#if !HAVE_READDIR_R
1130	UNLOCK (readdirlock);
1131	#endif
1132	#if !HAVE_PREADWRITE
1133	UNLOCK (preadwritelock);
1134	#endif
1135	UNLOCK (reslock);
1136	UNLOCK (reqlock);
1137	UNLOCK (wrklock);
1138	}	484	}
1139		485
1140	static void atfork_child (void)	486	static void atfork_child (void)
1141	{	487	{
1142	aio_req prv;
1143
1144	while (prv = reqq_shift (&req_queue))
1145	req_free (prv);
1146
1147	while (prv = reqq_shift (&res_queue))
1148	req_free (prv);
1149
1150	while (wrk_first.next != &wrk_first)
1151	{
1152	worker *wrk = wrk_first.next;
1153
1154	if (wrk->req)
1155	req_free (wrk->req);
1156
1157	worker_clear (wrk);
1158	worker_free (wrk);
1159	}
1160
1161	started = 0;
1162	idle = 0;
1163	nreqs = 0;
1164	nready = 0;
1165	npending = 0;
1166
1167	close (respipe [0]);
1168	close (respipe [1]);
1169	create_pipe ();	488	create_respipe ();
		489	}
1170		490
1171	atfork_parent ();	491	static SV *
		492	get_cb (SV *cb_sv)
		493	{
		494	SvGETMAGIC (cb_sv);
		495	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1172	}	496	}
1173		497
1174	#define dREQ \	498	#define dREQ \
		499	SV *cb_cv; \
1175	aio_req req; \	500	aio_req req; \
1176	int req_pri = next_pri; \	501	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \	502	next_pri = EIO_PRI_DEFAULT; \
1178	\	503	\
1179	if (SvOK (callback) && !SvROK (callback)) \	504	cb_cv = get_cb (callback); \
1180	croak ("callback must be undef or of reference type"); \
1181	\	505	\
1182	Newz (0, req, 1, aio_cb); \	506	Newz (0, req, 1, eio_req); \
1183	if (!req) \	507	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \	508	croak ("out of memory during eio_req allocation"); \
1185	\	509	\
1186	req->callback = newSVsv (callback); \	510	req->callback = SvREFCNT_inc (cb_cv); \
1187	req->pri = req_pri	511	req->pri = req_pri
1188		512
1189	#define REQ_SEND \	513	#define REQ_SEND \
		514	PUTBACK; \
1190	req_send (req); \	515	req_submit (req); \
		516	SPAGAIN; \
1191	\	517	\
1192	if (GIMME_V != G_VOID) \	518	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));	519	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1194		520
1195	MODULE = IO::AIO PACKAGE = IO::AIO	521	MODULE = IO::AIO PACKAGE = IO::AIO
1196		522
1197	PROTOTYPES: ENABLE	523	PROTOTYPES: ENABLE
1198		524
1199	BOOT:	525	BOOT:
1200	{	526	{
		527	static const struct {
		528	const char *name;
		529	IV iv;
		530	} *civ, const_iv[] = {
		531	# define const_iv(name, value) { # name, (IV) value },
		532	# define const_eio(name) { # name, (IV) EIO_ ## name },
		533	const_iv (EXDEV , EXDEV)
		534	const_iv (ENOSYS , ENOSYS)
		535	const_iv (O_RDONLY, O_RDONLY)
		536	const_iv (O_WRONLY, O_WRONLY)
		537	const_iv (O_CREAT , O_CREAT)
		538	const_iv (O_TRUNC , O_TRUNC)
		539	#ifndef _WIN32
		540	const_iv (S_IFIFO , S_IFIFO)
		541	#endif
		542	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		543	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		544	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		545	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		546	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		547	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		548
		549	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		550	const_eio (SYNC_FILE_RANGE_WRITE)
		551	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		552
		553	const_eio (READDIR_DENTS)
		554	const_eio (READDIR_DIRS_FIRST)
		555	const_eio (READDIR_STAT_ORDER)
		556	const_eio (READDIR_FOUND_UNKNOWN)
		557
		558	const_eio (DT_UNKNOWN)
		559	const_eio (DT_FIFO)
		560	const_eio (DT_CHR)
		561	const_eio (DT_DIR)
		562	const_eio (DT_BLK)
		563	const_eio (DT_REG)
		564	const_eio (DT_LNK)
		565	const_eio (DT_SOCK)
		566	const_eio (DT_WHT)
		567	};
		568
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	569	stash = gv_stashpv ("IO::AIO", 1);
1202		570
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	571	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	572	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1209		573
1210	create_pipe ();	574	create_respipe ();
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	575
		576	if (eio_init (want_poll, done_poll) < 0)
		577	croak ("IO::AIO: unable to initialise eio library");
		578
		579	/* atfork child called in fifo order, so before eio's handler */
		580	X_THREAD_ATFORK (0, 0, atfork_child);
1212	}	581	}
		582
		583	void
		584	max_poll_reqs (int nreqs)
		585	PROTOTYPE: $
		586	CODE:
		587	eio_set_max_poll_reqs (nreqs);
		588
		589	void
		590	max_poll_time (double nseconds)
		591	PROTOTYPE: $
		592	CODE:
		593	eio_set_max_poll_time (nseconds);
1213		594
1214	void	595	void
1215	min_parallel (int nthreads)	596	min_parallel (int nthreads)
1216	PROTOTYPE: $	597	PROTOTYPE: $
		598	CODE:
		599	eio_set_min_parallel (nthreads);
1217		600
1218	void	601	void
1219	max_parallel (int nthreads)	602	max_parallel (int nthreads)
1220	PROTOTYPE: $	603	PROTOTYPE: $
		604	CODE:
		605	eio_set_max_parallel (nthreads);
1221		606
1222	int	607	void
		608	max_idle (int nthreads)
		609	PROTOTYPE: $
		610	CODE:
		611	eio_set_max_idle (nthreads);
		612
		613	void
1223	max_outstanding (int maxreqs)	614	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	615	PROTOTYPE: $
1225	CODE:	616	CODE:
1226	RETVAL = max_outstanding;
1227	max_outstanding = maxreqs;	617	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		618
1231	void	619	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	620	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1233	SV * pathname
1234	int flags
1235	int mode
1236	SV * callback
1237	PROTOTYPE: $$$;$	621	PROTOTYPE: $$$;$
1238	PPCODE:	622	PPCODE:
1239	{	623	{
1240	dREQ;	624	dREQ;
1241		625
1242	req->type = REQ_OPEN;	626	req->type = EIO_OPEN;
1243	req->data = newSVsv (pathname);	627	req->sv1 = newSVsv (pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);	628	req->ptr1 = SvPVbyte_nolen (req->sv1);
1245	req->fd = flags;	629	req->int1 = flags;
1246	req->mode = mode;	630	req->int2 = mode;
1247		631
1248	REQ_SEND;	632	REQ_SEND;
1249	}	633	}
1250		634
1251	void	635	void
1252	aio_close (fh,callback=&PL_sv_undef)	636	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$	637	PROTOTYPE: $;$
1256	ALIAS:	638	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	639	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	640	aio_fdatasync = EIO_FDATASYNC
1260	PPCODE:	641	PPCODE:
1261	{	642	{
		643	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	644	dREQ;
1263		645
1264	req->type = ix;	646	req->type = ix;
1265	req->fh = newSVsv (fh);	647	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	648	req->int1 = fd;
1267		649
1268	REQ_SEND (req);	650	REQ_SEND (req);
1269	}	651	}
1270		652
1271	void	653	void
		654	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		655	PROTOTYPE: $$$$;$
		656	PPCODE:
		657	{
		658	int fd = s_fileno_croak (fh, 0);
		659	dREQ;
		660
		661	req->type = EIO_SYNC_FILE_RANGE;
		662	req->sv1 = newSVsv (fh);
		663	req->int1 = fd;
		664	req->offs = offset;
		665	req->size = nbytes;
		666	req->int2 = flags;
		667
		668	REQ_SEND (req);
		669	}
		670
		671	void
		672	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $;$
		674	PPCODE:
		675	{
		676	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		677	int fd = s_fileno_croak (fh, 0);
		678	dREQ;
		679
		680	if (close_pipe < 0)
		681	{
		682	int pipefd [2];
		683
		684	if (pipe (pipefd) < 0
		685	|| close (pipefd [1]) < 0
		686	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		687	abort (); /*D*/
		688
		689	close_pipe = pipefd [0];
		690	}
		691
		692	req->type = EIO_DUP2;
		693	req->int1 = close_pipe;
		694	req->sv2 = newSVsv (fh);
		695	req->int2 = fd;
		696
		697	REQ_SEND (req);
		698	}
		699
		700	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	701	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1273	SV * fh
1274	UV offset
1275	UV length
1276	SV * data
1277	UV dataoffset
1278	SV * callback
1279	ALIAS:	702	ALIAS:
1280	aio_read = REQ_READ	703	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	704	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$	705	PROTOTYPE: $$$$$;$
1283	PPCODE:	706	PPCODE:
1284	{	707	{
1285	aio_req req;
1286	STRLEN svlen;	708	STRLEN svlen;
		709	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	710	char *svptr = SvPVbyte (data, svlen);
1288		711	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		712
1292	if (dataoffset < 0)	713	if (dataoffset < 0)
1293	dataoffset += svlen;	714	dataoffset += svlen;
1294		715
1295	if (dataoffset < 0 || dataoffset > svlen)	716	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	717	croak ("dataoffset outside of data scalar");
1297		718
1298	if (ix == REQ_WRITE)	719	if (ix == EIO_WRITE)
1299	{	720	{
1300	/* write: check length and adjust. */	721	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	722	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	723	len = svlen - dataoffset;
1303	}	724	}
1304	else	725	else
1305	{	726	{
1306	/* read: grow scalar as necessary */	727	/* read: check type and grow scalar as necessary */
		728	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	729	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	730	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		731
1313	{	732	{
1314	dREQ;	733	dREQ;
1315		734
1316	req->type = ix;	735	req->type = ix;
1317	req->fh = newSVsv (fh);	736	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	737	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	739	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	740	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	741	req->ptr2 = (char *)svptr + dataoffset;
		742	req->stroffset = dataoffset;
1324		743
1325	if (!SvREADONLY (data))	744	if (!SvREADONLY (data))
1326	{	745	{
1327	SvREADONLY_on (data);	746	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	747	req->flags |= FLAG_SV2_RO_OFF;
1329	}	748	}
1330		749
1331	REQ_SEND;	750	REQ_SEND;
1332	}	751	}
1333	}	752	}
1334		753
1335	void	754	void
		755	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		756	PROTOTYPE: $$;$
		757	PPCODE:
		758	{
		759	SV *data;
		760	dREQ;
		761
		762	req->type = EIO_READLINK;
		763	req->sv1 = newSVsv (path);
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765
		766	REQ_SEND;
		767	}
		768
		769	void
1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	770	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1337	SV * out_fh
1338	SV * in_fh
1339	UV in_offset
1340	UV length
1341	SV * callback
1342	PROTOTYPE: $$$$;$	771	PROTOTYPE: $$$$;$
1343	PPCODE:	772	PPCODE:
1344	{	773	{
		774	int ifd = s_fileno_croak (in_fh , 0);
		775	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	776	dREQ;
1346		777
1347	req->type = REQ_SENDFILE;	778	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	779	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	780	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	781	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	782	req->int2 = ifd;
1352	req->offset = in_offset;	783	req->offs = in_offset;
1353	req->length = length;	784	req->size = length;
1354		785
1355	REQ_SEND;	786	REQ_SEND;
1356	}	787	}
1357		788
1358	void	789	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	790	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$	791	PROTOTYPE: $$$;$
1365	PPCODE:	792	PPCODE:
1366	{	793	{
		794	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	795	dREQ;
1368		796
1369	req->type = REQ_READAHEAD;	797	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	798	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	799	req->int1 = fd;
1372	req->offset = offset;	800	req->offs = offset;
1373	req->length = length;	801	req->size = length;
1374		802
1375	REQ_SEND;	803	REQ_SEND;
1376	}	804	}
1377		805
1378	void	806	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	807	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	808	ALIAS:
1383	aio_stat = REQ_STAT	809	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	810	aio_lstat = EIO_LSTAT
1385	PPCODE:	811	PPCODE:
1386	{	812	{
1387	dREQ;	813	dREQ;
1388		814
1389	New (0, req->statdata, 1, Stat_t);	815	req->sv1 = newSVsv (fh_or_path);
1390	if (!req->statdata)
1391	{
1392	req_free (req);
1393	croak ("out of memory during aio_req->statdata allocation");
1394	}
1395		816
1396	if (SvPOK (fh_or_path))	817	if (SvPOK (req->sv1))
1397	{	818	{
1398	req->type = ix;	819	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);	820	req->ptr1 = SvPVbyte_nolen (req->sv1);
1401	}	821	}
1402	else	822	else
1403	{	823	{
1404	req->type = REQ_FSTAT;	824	req->type = EIO_FSTAT;
1405	req->fh = newSVsv (fh_or_path);
1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	825	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}	826	}
1408		827
1409	REQ_SEND;	828	REQ_SEND;
1410	}	829	}
1411		830
1412	void	831	void
		832	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		833	PPCODE:
		834	{
		835	dREQ;
		836
		837	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		838	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = EIO_UTIME;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FUTIME;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->sv1 = newSVsv (fh_or_path);
		862	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		863
		864	if (SvPOK (req->sv1))
		865	{
		866	req->type = EIO_TRUNCATE;
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	}
		869	else
		870	{
		871	req->type = EIO_FTRUNCATE;
		872	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		873	}
		874
		875	REQ_SEND;
		876	}
		877
		878	void
		879	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		880	ALIAS:
		881	aio_chmod = EIO_CHMOD
		882	aio_mkdir = EIO_MKDIR
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->int2 = mode;
		888	req->sv1 = newSVsv (fh_or_path);
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = ix;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FCHMOD;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		906	PPCODE:
		907	{
		908	dREQ;
		909
		910	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		911	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		912	req->sv1 = newSVsv (fh_or_path);
		913
		914	if (SvPOK (req->sv1))
		915	{
		916	req->type = EIO_CHOWN;
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	}
		919	else
		920	{
		921	req->type = EIO_FCHOWN;
		922	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		923	}
		924
		925	REQ_SEND;
		926	}
		927
		928	void
		929	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		930	PPCODE:
		931	{
		932	dREQ;
		933
		934	req->type = EIO_READDIR;
		935	req->sv1 = newSVsv (pathname);
		936	req->ptr1 = SvPVbyte_nolen (req->sv1);
		937	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		938
		939	if (flags & EIO_READDIR_DENTS)
		940	req->int1 |= EIO_READDIR_CUSTOM2;
		941
		942	REQ_SEND;
		943	}
		944
		945	void
1413	aio_unlink (pathname,callback=&PL_sv_undef)	946	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	947	ALIAS:
1417	aio_unlink = REQ_UNLINK	948	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	949	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	950	aio_readdir = EIO_READDIR
1420	PPCODE:	951	PPCODE:
1421	{	952	{
1422	dREQ;	953	dREQ;
1423		954
1424	req->type = ix;	955	req->type = ix;
1425	req->data = newSVsv (pathname);	956	req->sv1 = newSVsv (pathname);
1426	req->dataptr = SvPVbyte_nolen (req->data);	957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958
		959	REQ_SEND;
		960	}
		961
		962	void
		963	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		964	ALIAS:
		965	aio_link = EIO_LINK
		966	aio_symlink = EIO_SYMLINK
		967	aio_rename = EIO_RENAME
		968	PPCODE:
		969	{
		970	dREQ;
		971
		972	req->type = ix;
		973	req->sv1 = newSVsv (oldpath);
		974	req->ptr1 = SvPVbyte_nolen (req->sv1);
		975	req->sv2 = newSVsv (newpath);
		976	req->ptr2 = SvPVbyte_nolen (req->sv2);
1427		977
1428	REQ_SEND;	978	REQ_SEND;
1429	}	979	}
1430		980
1431	void	981	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	982	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:
1437	aio_link = REQ_LINK
1438	aio_symlink = REQ_SYMLINK
1439	aio_rename = REQ_RENAME
1440	PPCODE:	983	PPCODE:
1441	{	984	{
1442	dREQ;	985	dREQ;
1443		986
1444	req->type = ix;	987	req->type = EIO_MKNOD;
1445	req->fh = newSVsv (oldpath);	988	req->sv1 = newSVsv (pathname);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	989	req->ptr1 = SvPVbyte_nolen (req->sv1);
1447	req->data = newSVsv (newpath);	990	req->int2 = (mode_t)mode;
1448	req->dataptr = SvPVbyte_nolen (req->data);	991	req->offs = dev;
1449		992
1450	REQ_SEND;	993	REQ_SEND;
1451	}	994	}
1452		995
1453	void	996	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	997	aio_busy (double delay, SV *callback=&PL_sv_undef)
1455	SV * pathname
1456	SV * callback
1457	UV mode
1458	UV dev
1459	PPCODE:	998	PPCODE:
1460	{	999	{
1461	dREQ;	1000	dREQ;
1462		1001
1463	req->type = REQ_MKNOD;	1002	req->type = EIO_BUSY;
1464	req->data = newSVsv (pathname);	1003	req->nv1 = delay < 0. ? 0. : delay;
1465	req->dataptr = SvPVbyte_nolen (req->data);	1004
1466	req->mode = (mode_t)mode;
1467	req->offset = dev;
1468
1469	REQ_SEND;	1005	REQ_SEND;
1470	}	1006	}
1471		1007
1472	void	1008	void
1473	aio_busy (delay,callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:
1477	{
1478	dREQ;
1479
1480	req->type = REQ_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483
1484	REQ_SEND;
1485	}
1486
1487	void
1488	aio_group (callback=&PL_sv_undef)	1009	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$	1010	PROTOTYPE: ;$
1491	PPCODE:	1011	PPCODE:
1492	{	1012	{
1493	dREQ;	1013	dREQ;
1494		1014
1495	req->type = REQ_GROUP;	1015	req->type = EIO_GROUP;
		1016
1496	req_send (req);	1017	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1018	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1499	}	1019	}
1500		1020
1501	void	1021	void
1502	aio_nop (callback=&PL_sv_undef)	1022	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1023	ALIAS:
		1024	aio_nop = EIO_NOP
		1025	aio_sync = EIO_SYNC
1504	PPCODE:	1026	PPCODE:
1505	{	1027	{
1506	dREQ;	1028	dREQ;
1507		1029
1508	req->type = REQ_NOP;	1030	req->type = ix;
1509		1031
1510	REQ_SEND;	1032	REQ_SEND;
1511	}	1033	}
1512		1034
1513	int	1035	int
1514	aioreq_pri (int pri = 0)	1036	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$	1037	PROTOTYPE: ;$
1516	CODE:	1038	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1039	RETVAL = next_pri;
1518	if (items > 0)	1040	if (items > 0)
1519	{	1041	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1042	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1043	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1044	next_pri = pri;
1523	}	1045	}
1524	OUTPUT:	1046	OUTPUT:
1525	RETVAL	1047	RETVAL
1526		1048
1527	void	1049	void
1528	aioreq_nice (int nice = 0)	1050	aioreq_nice (int nice = 0)
1529	CODE:	1051	CODE:
1530	nice = next_pri - nice;	1052	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1053	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1054	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1055	next_pri = nice;
1534		1056
1535	void	1057	void
1536	flush ()	1058	flush ()
1537	PROTOTYPE:	1059	PROTOTYPE:
1538	CODE:	1060	CODE:
1539	while (nreqs)	1061	while (eio_nreqs ())
1540	{	1062	{
1541	poll_wait ();	1063	poll_wait ();
1542	poll_cb (0);	1064	poll_cb ();
1543	}	1065	}
1544		1066
1545	void	1067	int
1546	poll()	1068	poll()
1547	PROTOTYPE:	1069	PROTOTYPE:
1548	CODE:	1070	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();	1071	poll_wait ();
1552	poll_cb (0);	1072	RETVAL = poll_cb ();
1553	}	1073	OUTPUT:
		1074	RETVAL
1554		1075
1555	int	1076	int
1556	poll_fileno()	1077	poll_fileno()
1557	PROTOTYPE:	1078	PROTOTYPE:
1558	CODE:	1079	CODE:
1559	RETVAL = respipe [0];	1080	RETVAL = s_epipe_fd (&respipe);
1560	OUTPUT:	1081	OUTPUT:
1561	RETVAL	1082	RETVAL
1562		1083
1563	int	1084	int
1564	poll_cb(...)	1085	poll_cb(...)
1565	PROTOTYPE:	1086	PROTOTYPE:
1566	CODE:	1087	CODE:
1567	RETVAL = poll_cb (0);	1088	RETVAL = poll_cb ();
1568	OUTPUT:	1089	OUTPUT:
1569	RETVAL	1090	RETVAL
1570		1091
1571	int
1572	poll_some(int max = 0)
1573	PROTOTYPE: $
1574	CODE:
1575	RETVAL = poll_cb (max);
1576	OUTPUT:
1577	RETVAL
1578
1579	void	1092	void
1580	poll_wait()	1093	poll_wait()
1581	PROTOTYPE:	1094	PROTOTYPE:
1582	CODE:	1095	CODE:
1583	if (nreqs)
1584	poll_wait ();	1096	poll_wait ();
1585		1097
1586	int	1098	int
1587	nreqs()	1099	nreqs()
1588	PROTOTYPE:	1100	PROTOTYPE:
1589	CODE:	1101	CODE:
1590	RETVAL = nreqs;	1102	RETVAL = eio_nreqs ();
1591	OUTPUT:	1103	OUTPUT:
1592	RETVAL	1104	RETVAL
1593		1105
1594	int	1106	int
1595	nready()	1107	nready()
1596	PROTOTYPE:	1108	PROTOTYPE:
1597	CODE:	1109	CODE:
1598	RETVAL = get_nready ();	1110	RETVAL = eio_nready ();
1599	OUTPUT:	1111	OUTPUT:
1600	RETVAL	1112	RETVAL
1601		1113
1602	int	1114	int
1603	npending()	1115	npending()
1604	PROTOTYPE:	1116	PROTOTYPE:
1605	CODE:	1117	CODE:
1606	RETVAL = get_npending ();	1118	RETVAL = eio_npending ();
1607	OUTPUT:	1119	OUTPUT:
1608	RETVAL	1120	RETVAL
1609		1121
		1122	int
		1123	nthreads()
		1124	PROTOTYPE:
		1125	CODE:
		1126	RETVAL = eio_nthreads ();
		1127	OUTPUT:
		1128	RETVAL
		1129
		1130	int
		1131	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1132	PROTOTYPE: $$$$
		1133	CODE:
		1134	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1135	RETVAL = posix_fadvise (fh, offset, length, advice);
		1136	#else
		1137	RETVAL = errno = ENOSYS;
		1138	#endif
		1139	OUTPUT:
		1140	RETVAL
		1141
		1142	ssize_t
		1143	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1144	PROTOTYPE: $$$$
		1145	CODE:
		1146	eio_sendfile_sync (ofh, ifh, offset, count);
		1147
		1148	void _on_next_submit (SV *cb)
		1149	CODE:
		1150	SvREFCNT_dec (on_next_submit);
		1151	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1152
1610	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
1611		1154
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1155	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1156
1614	void	1157	void
1615	cancel (aio_req_ornot req)	1158	cancel (aio_req_ornot req)
1616	CODE:	1159	CODE:
1617	req_cancel (req);	1160	eio_cancel (req);
1618		1161
1619	void	1162	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1163	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1164	PPCODE:
		1165	{
		1166	if (GIMME_V != G_VOID)
		1167	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1168
		1169	if (items > 1)
		1170	{
		1171	SV *cb_cv =get_cb (callback);
		1172
1622	SvREFCNT_dec (req->callback);	1173	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1174	req->callback = SvREFCNT_inc (cb_cv);
		1175	}
		1176	}
1624		1177
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1178	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1179
1627	void	1180	void
1628	add (aio_req grp, ...)	1181	add (aio_req grp, ...)
1629	PPCODE:	1182	PPCODE:
1630	{	1183	{
1631	int i;	1184	int i;
1632	aio_req req;
1633		1185
1634	if (grp->fd == 2)	1186	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1187	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1188
1637	for (i = 1; i < items; ++i )	1189	for (i = 1; i < items; ++i )
1638	{	1190	{
		1191	aio_req req;
		1192
1639	if (GIMME_V != G_VOID)	1193	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1194	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1195
1642	req = SvAIO_REQ (ST (i));	1196	req = SvAIO_REQ (ST (i));
1643		1197
1644	if (req)	1198	if (req)
1645	{	1199	eio_grp_add (grp, req);
1646	++grp->length;
1647	req->grp = grp;
1648
1649	req->grp_prev = 0;
1650	req->grp_next = grp->grp_first;
1651
1652	if (grp->grp_first)
1653	grp->grp_first->grp_prev = req;
1654
1655	grp->grp_first = req;
1656	}
1657	}	1200	}
1658	}	1201	}
1659		1202
1660	void	1203	void
1661	cancel_subs (aio_req_ornot req)	1204	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1213	AV *av;
1671		1214
1672	grp->errorno = errno;	1215	grp->errorno = errno;
1673		1216
1674	av = newAV ();	1217	av = newAV ();
		1218	av_extend (av, items - 1);
1675		1219
1676	for (i = 1; i < items; ++i )	1220	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1221	av_push (av, newSVsv (ST (i)));
1678		1222
1679	SvREFCNT_dec (grp->data);	1223	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1224	grp->sv1 = (SV *)av;
1681	}	1225	}
1682		1226
1683	void	1227	void
1684	errno (aio_req grp, int errorno = errno)	1228	errno (aio_req grp, int errorno = errno)
1685	CODE:	1229	CODE:
1686	grp->errorno = errorno;	1230	grp->errorno = errorno;
1687		1231
1688	void	1232	void
1689	limit (aio_req grp, int limit)	1233	limit (aio_req grp, int limit)
1690	CODE:	1234	CODE:
1691	grp->fd2 = limit;	1235	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1236
1694	void	1237	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1238	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1239	CODE:
1697	{	1240	{
1698	SvREFCNT_dec (grp->fh2);	1241	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1242	grp->sv2 = newSVsv (callback);
		1243	grp->feed = aio_grp_feed;
1700		1244
1701	if (grp->fd2 <= 0)	1245	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1246	grp->int2 = 2;
1703		1247
1704	aio_grp_feed (grp);	1248	eio_grp_limit (grp, grp->int2);
1705	}	1249	}
1706		1250

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