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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.94 by root, Sun Nov 26 18:28:37 2006 UTC vs.
Revision 1.158 by root, Sat Jan 2 14:11:32 2010 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>
22	#include <stdlib.h>	12	#include <stdlib.h>
23	#include <errno.h>	13	#include <errno.h>
24	#include <sys/time.h>
25	#include <sys/select.h>
26	#include <sys/types.h>	14	#include <sys/types.h>
27	#include <sys/stat.h>	15	#include <sys/stat.h>
28	#include <limits.h>	16	#include <limits.h>
29	#include <unistd.h>
30	#include <fcntl.h>	17	#include <fcntl.h>
31	#include <signal.h>
32	#include <sched.h>	18	#include <sched.h>
33		19
34	#if HAVE_SENDFILE	20	/* perl namespace pollution */
35	# if __linux	21	#undef VERSION
36	# include <sys/sendfile.h>	22
37	# elif __freebsd	23	#ifdef _WIN32
38	# include <sys/socket.h>	24
39	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
40	# elif __hpux	26	# undef malloc
41	# include <sys/socket.h>	27	# undef free
42	# elif __solaris /* not yet */	28
43	# 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
44	# else	61	#else
45	# error sendfile support requested but not available	62
46	# 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
47	#endif	70	#endif
48		71
49	/* number of seconds after which idle threads exit */	72	/* perl stupidly overrides readdir and maybe others */
50	#define IDLE_TIMEOUT 10	73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
51		77
52	/* used for struct dirent, AIX doesn't provide it */	78	#define EIO_STRUCT_STAT Stat_t
53	#ifndef NAME_MAX	79
54	# 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
55	#endif	89	#endif
56		90
57	#ifndef PTHREAD_STACK_MIN	91	/*****************************************************************************/
58	/* care for broken platforms, e.g. windows */	92
59	# 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)
60	#endif	97	#endif
61		98
62	#if __ia64	99	#define expect_false(expr) expect ((expr) != 0, 0)
63	# define STACKSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	101
65	# define STACKSIZE PTHREAD_STACK_MIN	102	/*****************************************************************************/
66	#else	103
67	# define STACKSIZE 16384	104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
68	#endif	123	#endif
69		124
70	/* wether word reads are potentially non-atomic.	125	#ifndef POSIX_FADV_SEQUENTIAL
71	* this is conservatice, likely most arches this runs	126	# define POSIX_FADV_SEQUENTIAL 0
72	* on have atomic word read/writes.
73	*/
74	#ifndef WORDACCESS_UNSAFE
75	# if __i386 || __x86_64
76	# define WORDACCESS_UNSAFE 0
77	# else
78	# define WORDACCESS_UNSAFE 1
79	# endif
80	#endif	127	#endif
81		128
82	/* buffer size for various temporary buffers */	129	#ifndef POSIX_FADV_RANDOM
83	#define AIO_BUFSIZE 65536	130	# define POSIX_FADV_RANDOM 0
		131	#endif
84		132
85	#define dBUF \	133	#ifndef POSIX_FADV_NOREUSE
86	char *aio_buf; \	134	# define POSIX_FADV_NOREUSE 0
87	LOCK (wrklock); \	135	#endif
88	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
89	UNLOCK (wrklock); \
90	if (!aio_buf) \
91	return -1;
92		136
93	typedef SV SV8; /* byte-sv, used for argument-checking */	137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
94		149
95	enum {	150	enum {
96	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
97	REQ_OPEN, REQ_CLOSE,
98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
99	REQ_SENDFILE,
100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
101	REQ_FSYNC, REQ_FDATASYNC,
102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
103	REQ_MKNOD, REQ_READDIR,
104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
105	REQ_GROUP, REQ_NOP,
106	REQ_BUSY,
107	};	152	};
108		153
109	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
110	#define AIO_GRP_KLASS "IO::AIO::GRP"
111		155
112	typedef struct aio_cb
113	{
114	struct aio_cb *volatile next;
115
116	SV *callback, *fh;
117	SV *sv1, *sv2;
118	void *ptr1, *ptr2;
119	off_t offs;
120	size_t size;
121	ssize_t result;
122
123	STRLEN stroffset;
124	int type;
125	int int1, int2;
126	int errorno;
127	mode_t mode; /* open */
128
129	unsigned char flags;
130	unsigned char pri;
131
132	SV *self; /* the perl counterpart of this request, if any */
133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
134	} aio_cb;
135
136	enum {
137	FLAG_CANCELLED = 0x01, /* request was cancelled */
138	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
139	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
140	};
141
142	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
143	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
144		158
145	enum {	159	static SV *on_next_submit;
146	PRI_MIN = -4,	160	static int next_pri = EIO_PRI_DEFAULT;
147	PRI_MAX = 4,	161	static int max_outstanding;
148		162
149	DEFAULT_PRI = 0,	163	static s_epipe respipe;
150	PRI_BIAS = -PRI_MIN,
151	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
152	};
153		164
154	#define AIO_TICKS ((1000000 + 1023) >> 10)
155
156	static unsigned int max_poll_time = 0;
157	static unsigned int max_poll_reqs = 0;
158
159	/* calculcate time difference in ~1/AIO_TICKS of a second */
160	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
161	{
162	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
163	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
164	}
165
166	static pthread_t main_tid;
167	static int main_sig;
168	static int block_sig_level;
169
170	void block_sig ()
171	{
172	sigset_t ss;
173
174	if (block_sig_level++)
175	return;
176
177	if (!main_sig)
178	return;
179
180	sigemptyset (&ss);
181	sigaddset (&ss, main_sig);
182	pthread_sigmask (SIG_BLOCK, &ss, 0);
183	}
184
185	void unblock_sig ()
186	{
187	sigset_t ss;
188
189	if (--block_sig_level)
190	return;
191
192	if (!main_sig)
193	return;
194
195	sigemptyset (&ss);
196	sigaddset (&ss, main_sig);
197	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
198	}
199
200	static int next_pri = DEFAULT_PRI + PRI_BIAS;
201
202	static unsigned int started, idle, wanted;
203
204	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
205	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
206	#else
207	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
208	#endif
209
210	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
211	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
212
213	/* worker threads management */
214	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
215
216	typedef struct worker {
217	/* locked by wrklock */
218	struct worker *prev, *next;
219
220	pthread_t tid;
221
222	/* locked by reslock, reqlock or wrklock */
223	aio_req req; /* currently processed request */
224	void *dbuf;
225	DIR *dirp;
226	} worker;
227
228	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
229
230	static void worker_clear (worker *wrk)
231	{
232	if (wrk->dirp)
233	{
234	closedir (wrk->dirp);
235	wrk->dirp = 0;
236	}
237
238	if (wrk->dbuf)
239	{
240	free (wrk->dbuf);
241	wrk->dbuf = 0;
242	}
243	}
244
245	static void worker_free (worker *wrk)
246	{
247	wrk->next->prev = wrk->prev;
248	wrk->prev->next = wrk->next;
249
250	free (wrk);
251	}
252
253	static volatile unsigned int nreqs, nready, npending;
254	static volatile unsigned int max_idle = 4;
255	static volatile unsigned int max_outstanding = 0xffffffff;
256	static int respipe [2];
257
258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
261
262	#if WORDACCESS_UNSAFE
263
264	static unsigned int get_nready ()
265	{
266	unsigned int retval;
267
268	LOCK (reqlock);
269	retval = nready;
270	UNLOCK (reqlock);
271
272	return retval;
273	}
274
275	static unsigned int get_npending ()
276	{
277	unsigned int retval;
278
279	LOCK (reslock);
280	retval = npending;
281	UNLOCK (reslock);
282
283	return retval;
284	}
285
286	static unsigned int get_nthreads ()
287	{
288	unsigned int retval;
289
290	LOCK (wrklock);
291	retval = started;
292	UNLOCK (wrklock);
293
294	return retval;
295	}
296
297	#else
298
299	# define get_nready() nready
300	# define get_npending() npending
301	# define get_nthreads() started
302
303	#endif
304
305	/*
306	* a somewhat faster data structure might be nice, but
307	* with 8 priorities this actually needs <20 insns
308	* per shift, the most expensive operation.
309	*/
310	typedef struct {
311	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
312	int size;
313	} reqq;
314
315	static reqq req_queue;
316	static reqq res_queue;
317
318	int reqq_push (reqq *q, aio_req req)
319	{
320	int pri = req->pri;
321	req->next = 0;
322
323	if (q->qe[pri])
324	{
325	q->qe[pri]->next = req;
326	q->qe[pri] = req;
327	}
328	else
329	q->qe[pri] = q->qs[pri] = req;
330
331	return q->size++;
332	}
333
334	aio_req reqq_shift (reqq *q)
335	{
336	int pri;
337
338	if (!q->size)
339	return 0;
340
341	--q->size;
342
343	for (pri = NUM_PRI; pri--; )
344	{
345	aio_req req = q->qs[pri];
346
347	if (req)
348	{
349	if (!(q->qs[pri] = req->next))
350	q->qe[pri] = 0;
351
352	return req;
353	}
354	}
355
356	abort ();
357	}
358
359	static int poll_cb ();
360	static int req_invoke (aio_req req);
361	static void req_free (aio_req req);	165	static void req_destroy (aio_req req);
362	static void req_cancel (aio_req req);	166	static void req_cancel (aio_req req);
363		167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
		179
364	/* must be called at most once */	180	/* must be called at most once */
365	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
366	{	182	{
367	if (!req->self)	183	if (!req->self)
368	{	184	{
369	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
371	}	187	}
372		188
373	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
374	}	190	}
375		191
376	static aio_req SvAIO_REQ (SV *sv)	192	static aio_req SvAIO_REQ (SV *sv)
377	{	193	{
378	MAGIC *mg;	194	MAGIC *mg;
379		195
380	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
381	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class IO::AIO::REQ expected");
382		201
383	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
384		203
385	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
386	}	205	}
387		206
388	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
389	{	208	{
390	block_sig ();	209	if (grp->sv2 && SvOK (grp->sv2))
391
392	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
393	{	210	{
394	int old_len = grp->size;
395
396	if (grp->sv2 && SvOK (grp->sv2))
397	{
398	dSP;	211	dSP;
399		212
400	ENTER;	213	ENTER;
401	SAVETMPS;	214	SAVETMPS;
402	PUSHMARK (SP);	215	PUSHMARK (SP);
403	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	216	XPUSHs (req_sv (grp, aio_grp_stash));
404	PUTBACK;	217	PUTBACK;
405	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
406	SPAGAIN;	219	SPAGAIN;
407	FREETMPS;	220	FREETMPS;
408	LEAVE;	221	LEAVE;
409	}
410
411	/* stop if no progress has been made */
412	if (old_len == grp->size)
413	{
414	SvREFCNT_dec (grp->sv2);
415	grp->sv2 = 0;
416	break;
417	}
418	}	222	}
419
420	unblock_sig ();
421	}	223	}
422		224
423	static void aio_grp_dec (aio_req grp)	225	static void req_submit (eio_req *req)
424	{	226	{
425	--grp->size;	227	eio_submit (req);
426		228
427	/* call feeder, if applicable */	229	if (expect_false (on_next_submit))
428	aio_grp_feed (grp);
429
430	/* finish, if done */
431	if (!grp->size && grp->int1)
432	{	230	{
433	block_sig ();	231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
434		233
435	if (!req_invoke (grp))	234	on_next_submit = 0;
436	{
437	req_free (grp);
438	unblock_sig ();
439	croak (0);
440	}
441		235
442	req_free (grp);	236	PUSHMARK (SP);
443	unblock_sig ();	237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
444	}	239	}
445	}	240	}
446		241
447	static int req_invoke (aio_req req)	242	static int req_invoke (eio_req *req)
448	{	243	{
449	dSP;	244	dSP;
450		245
451	if (req->flags & FLAG_SV1_RO_OFF)	246	if (req->flags & FLAG_SV2_RO_OFF)
452	SvREADONLY_off (req->sv1);	247	SvREADONLY_off (req->sv2);
453		248
454	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	249	if (!EIO_CANCELLED (req) && req->callback)
455	{	250	{
456	ENTER;	251	ENTER;
457	SAVETMPS;	252	SAVETMPS;
458	PUSHMARK (SP);	253	PUSHMARK (SP);
459	EXTEND (SP, 1);	254	EXTEND (SP, 1);
460		255
461	switch (req->type)	256	switch (req->type)
462	{	257	{
463	case REQ_READDIR:	258	case EIO_READDIR:
464	{	259	{
465	SV *rv = &PL_sv_undef;	260	SV *rv = &PL_sv_undef;
466		261
467	if (req->result >= 0)	262	if (req->result >= 0)
468	{	263	{
469	int i;	264	int i;
470	char *buf = req->ptr2;	265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
471	AV *av = newAV ();	267	AV *av = newAV ();
472		268
473	av_extend (av, req->result - 1);	269	av_extend (av, req->result - 1);
474		270
475	for (i = 0; i < req->result; ++i)	271	for (i = 0; i < req->result; ++i)
476	{	272	{
477	SV *sv = newSVpv (buf, 0);	273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
478		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
479	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);
480	buf += SvCUR (sv) + 1;	305	names += SvCUR (name) + 1;
		306	}
481	}	307	}
482		308
483	rv = sv_2mortal (newRV_noinc ((SV *)av));	309	rv = sv_2mortal (newRV_noinc ((SV *)av));
484	}	310	}
485		311
486	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))));
487	}	316	}
488	break;	317	break;
489		318
490	case REQ_OPEN:	319	case EIO_OPEN:
491	{	320	{
492	/* convert fd to fh */	321	/* convert fd to fh */
493	SV *fh;	322	SV *fh = &PL_sv_undef;
494		323
495	PUSHs (sv_2mortal (newSViv (req->result)));	324	if (req->result >= 0)
496	PUTBACK;	325	{
497	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	326	GV *gv = (GV *)sv_newmortal ();
498	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, aio_stash, sym, symlen, 0);
499		333
500	fh = POPs;	334	symlen = snprintf (
501	PUSHMARK (SP);	335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
502	XPUSHs (fh);	346	PUSHs (fh);
503	}	347	}
504	break;	348	break;
505		349
506	case REQ_GROUP:	350	case EIO_GROUP:
507	req->int1 = 2; /* mark group as finished */	351	req->int1 = 2; /* mark group as finished */
508		352
509	if (req->sv1)	353	if (req->sv1)
510	{	354	{
511	int i;	355	int i;
…		…
515	for (i = 0; i <= AvFILL (av); ++i)	359	for (i = 0; i <= AvFILL (av); ++i)
516	PUSHs (*av_fetch (av, i, 0));	360	PUSHs (*av_fetch (av, i, 0));
517	}	361	}
518	break;	362	break;
519		363
520	case REQ_NOP:	364	case EIO_NOP:
521	case REQ_BUSY:	365	case EIO_BUSY:
522	break;	366	break;
523		367
524	case REQ_READLINK:	368	case EIO_READLINK:
525	if (req->result > 0)	369	if (req->result > 0)
526	{	370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
527	SvCUR_set (req->sv1, req->result);
528	*SvEND (req->sv1) = 0;
529	PUSHs (req->sv1);
530	}
531	break;	371	break;
532		372
533	case REQ_STAT:	373	case EIO_STAT:
534	case REQ_LSTAT:	374	case EIO_LSTAT:
535	case REQ_FSTAT:	375	case EIO_FSTAT:
536	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
537	PL_laststatval = req->result;	377	PL_laststatval = req->result;
538	PL_statcache = *(Stat_t *)(req->ptr2);	378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
539	PUSHs (sv_2mortal (newSViv (req->result)));	379	PUSHs (sv_2mortal (newSViv (req->result)));
540	break;	380	break;
541		381
542	case REQ_READ:	382	case EIO_READ:
		383	{
543	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
544	*SvEND (req->sv1) = 0;	385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
545	PUSHs (sv_2mortal (newSViv (req->result)));	388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
546	break;	390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
547		396
548	default:	397	default:
549	PUSHs (sv_2mortal (newSViv (req->result)));	398	PUSHs (sv_2mortal (newSViv (req->result)));
550	break;	399	break;
551	}	400	}
552		401
553	errno = req->errorno;	402	errno = req->errorno;
554		403
555	PUTBACK;	404	PUTBACK;
556	call_sv (req->callback, G_VOID | G_EVAL);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
557	SPAGAIN;	406	SPAGAIN;
558		407
559	FREETMPS;	408	FREETMPS;
560	LEAVE;	409	LEAVE;
		410
		411	PUTBACK;
561	}	412	}
562		413
563	if (req->grp)
564	{
565	aio_req grp = req->grp;
566
567	/* unlink request */
568	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
569	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
570
571	if (grp->grp_first == req)
572	grp->grp_first = req->grp_next;
573
574	aio_grp_dec (grp);
575	}
576
577	return !SvTRUE (ERRSV);	414	return !!SvTRUE (ERRSV);
578	}	415	}
579		416
580	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
581	{	418	{
582	if (req->self)	419	if (req->self)
583	{	420	{
584	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
585	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
586	}	423	}
587		424
588	SvREFCNT_dec (req->fh);
589	SvREFCNT_dec (req->sv1);	425	SvREFCNT_dec (req->sv1);
590	SvREFCNT_dec (req->sv2);	426	SvREFCNT_dec (req->sv2);
591	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
592		428
593	if (req->flags & FLAG_PTR2_FREE)
594	free (req->ptr2);
595
596	Safefree (req);	429	Safefree (req);
597	}	430	}
598		431
599	static void req_cancel_subs (aio_req grp)	432	static void req_cancel_subs (aio_req grp)
600	{	433	{
601	aio_req sub;	434	aio_req sub;
602		435
603	if (grp->type != REQ_GROUP)	436	if (grp->type != EIO_GROUP)
604	return;	437	return;
605		438
606	SvREFCNT_dec (grp->sv2);	439	SvREFCNT_dec (grp->sv2);
607	grp->sv2 = 0;	440	grp->sv2 = 0;
608		441
609	for (sub = grp->grp_first; sub; sub = sub->grp_next)	442	eio_grp_cancel (grp);
610	req_cancel (sub);
611	}	443	}
612		444
613	static void req_cancel (aio_req req)	445	static void
		446	create_respipe (void)
614	{	447	{
615	req->flags |= FLAG_CANCELLED;	448	if (s_epipe_renew (&respipe))
616		449	croak ("IO::AIO: unable to initialize result pipe");
617	req_cancel_subs (req);
618	}	450	}
619		451
620	static void *aio_proc(void *arg);
621
622	static void start_thread (void)
623	{
624	sigset_t fullsigset, oldsigset;
625	pthread_attr_t attr;
626
627	worker *wrk = calloc (1, sizeof (worker));
628
629	if (!wrk)
630	croak ("unable to allocate worker thread data");
631
632	pthread_attr_init (&attr);
633	pthread_attr_setstacksize (&attr, STACKSIZE);
634	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
635	#ifdef PTHREAD_SCOPE_PROCESS
636	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
637	#endif
638
639	sigfillset (&fullsigset);
640
641	LOCK (wrklock);
642	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
643
644	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
645	{
646	wrk->prev = &wrk_first;
647	wrk->next = wrk_first.next;
648	wrk_first.next->prev = wrk;
649	wrk_first.next = wrk;
650	++started;
651	}
652	else
653	free (wrk);
654
655	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
656	UNLOCK (wrklock);
657	}
658
659	static void maybe_start_thread ()
660	{
661	if (get_nthreads () >= wanted)
662	return;
663
664	/* todo: maybe use idle here, but might be less exact */
665	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
666	return;
667
668	start_thread ();
669	}
670
671	static void req_send (aio_req req)
672	{
673	block_sig ();
674
675	++nreqs;
676
677	LOCK (reqlock);
678	++nready;
679	reqq_push (&req_queue, req);
680	pthread_cond_signal (&reqwait);
681	UNLOCK (reqlock);
682
683	unblock_sig ();
684
685	maybe_start_thread ();
686	}
687
688	static void end_thread (void)
689	{
690	aio_req req;
691
692	Newz (0, req, 1, aio_cb);
693
694	req->type = REQ_QUIT;
695	req->pri = PRI_MAX + PRI_BIAS;
696
697	LOCK (reqlock);
698	reqq_push (&req_queue, req);
699	pthread_cond_signal (&reqwait);
700	UNLOCK (reqlock);
701
702	LOCK (wrklock);
703	--started;
704	UNLOCK (wrklock);
705	}
706
707	static void set_max_idle (int nthreads)
708	{
709	if (WORDACCESS_UNSAFE) LOCK (reqlock);
710	max_idle = nthreads <= 0 ? 1 : nthreads;
711	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
712	}
713
714	static void min_parallel (int nthreads)
715	{
716	if (wanted < nthreads)
717	wanted = nthreads;
718	}
719
720	static void max_parallel (int nthreads)
721	{
722	if (wanted > nthreads)
723	wanted = nthreads;
724
725	while (started > wanted)
726	end_thread ();
727	}
728
729	static void poll_wait ()	452	static void poll_wait (void)
730	{	453	{
731	fd_set rfd;
732
733	while (nreqs)	454	while (eio_nreqs ())
734	{	455	{
735	int size;	456	int size;
736	if (WORDACCESS_UNSAFE) LOCK (reslock);	457
		458	X_LOCK (reslock);
737	size = res_queue.size;	459	size = res_queue.size;
738	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	460	X_UNLOCK (reslock);
739		461
740	if (size)	462	if (size)
741	return;	463	return;
742		464
743	maybe_start_thread ();	465	etp_maybe_start_thread ();
744		466
745	FD_ZERO(&rfd);	467	s_epipe_wait (&respipe);
746	FD_SET(respipe [0], &rfd);
747
748	select (respipe [0] + 1, &rfd, 0, 0, 0);
749	}	468	}
750	}	469	}
751		470
752	static int poll_cb ()	471	static int poll_cb (void)
753	{	472	{
754	dSP;
755	int count = 0;
756	int maxreqs = max_poll_reqs;
757	int do_croak = 0;
758	struct timeval tv_start, tv_now;
759	aio_req req;
760
761	if (max_poll_time)
762	gettimeofday (&tv_start, 0);
763
764	block_sig ();
765
766	for (;;)	473	for (;;)
767	{	474	{
768	for (;;)	475	int res = eio_poll ();
769	{
770	maybe_start_thread ();
771		476
772	LOCK (reslock);	477	if (res > 0)
773	req = reqq_shift (&res_queue);
774
775	if (req)
776	{
777	--npending;
778
779	if (!res_queue.size)
780	{
781	/* read any signals sent by the worker threads */
782	char buf [32];
783	while (read (respipe [0], buf, 32) == 32)
784	;
785	}
786	}
787
788	UNLOCK (reslock);
789
790	if (!req)
791	break;
792
793	--nreqs;
794
795	if (req->type == REQ_GROUP && req->size)
796	{
797	req->int1 = 1; /* mark request as delayed */
798	continue;
799	}
800	else
801	{
802	if (!req_invoke (req))
803	{
804	req_free (req);
805	unblock_sig ();
806	croak (0);	478	croak (0);
807	}
808		479
809	count++;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
810	}	481	return res;
811
812	req_free (req);
813
814	if (maxreqs && !--maxreqs)
815	break;
816
817	if (max_poll_time)
818	{
819	gettimeofday (&tv_now, 0);
820
821	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
822	break;
823	}
824	}
825
826	if (nreqs <= max_outstanding)
827	break;
828		482
829	poll_wait ();	483	poll_wait ();
830
831	++maxreqs;
832	}	484	}
833
834	unblock_sig ();
835	return count;
836	}
837
838	static void create_pipe ()
839	{
840	if (pipe (respipe))
841	croak ("unable to initialize result pipe");
842
843	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
844	croak ("cannot set result pipe to nonblocking mode");
845
846	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
847	croak ("cannot set result pipe to nonblocking mode");
848	}
849
850	/*****************************************************************************/
851	/* work around various missing functions */
852
853	#if !HAVE_PREADWRITE
854	# define pread aio_pread
855	# define pwrite aio_pwrite
856
857	/*
858	* make our pread/pwrite safe against themselves, but not against
859	* normal read/write by using a mutex. slows down execution a lot,
860	* but that's your problem, not mine.
861	*/
862	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
863
864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
865	{
866	ssize_t res;
867	off_t ooffset;
868
869	LOCK (preadwritelock);
870	ooffset = lseek (fd, 0, SEEK_CUR);
871	lseek (fd, offset, SEEK_SET);
872	res = read (fd, buf, count);
873	lseek (fd, ooffset, SEEK_SET);
874	UNLOCK (preadwritelock);
875
876	return res;
877	}
878
879	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
880	{
881	ssize_t res;
882	off_t ooffset;
883
884	LOCK (preadwritelock);
885	ooffset = lseek (fd, 0, SEEK_CUR);
886	lseek (fd, offset, SEEK_SET);
887	res = write (fd, buf, count);
888	lseek (fd, offset, SEEK_SET);
889	UNLOCK (preadwritelock);
890
891	return res;
892	}
893	#endif
894
895	#if !HAVE_FDATASYNC
896	# define fdatasync fsync
897	#endif
898
899	#if !HAVE_READAHEAD
900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
901
902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
903	{
904	dBUF;
905
906	while (count > 0)
907	{
908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
909
910	pread (fd, aio_buf, len, offset);
911	offset += len;
912	count -= len;
913	}
914
915	errno = 0;
916	}
917
918	#endif
919
920	#if !HAVE_READDIR_R
921	# define readdir_r aio_readdir_r
922
923	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
924
925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
926	{
927	struct dirent *e;
928	int errorno;
929
930	LOCK (readdirlock);
931
932	e = readdir (dirp);
933	errorno = errno;
934
935	if (e)
936	{
937	*res = ent;
938	strcpy (ent->d_name, e->d_name);
939	}
940	else
941	*res = 0;
942
943	UNLOCK (readdirlock);
944
945	errno = errorno;
946	return e ? 0 : -1;
947	}
948	#endif
949
950	/* sendfile always needs emulation */
951	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
952	{
953	ssize_t res;
954
955	if (!count)
956	return 0;
957
958	#if HAVE_SENDFILE
959	# if __linux
960	res = sendfile (ofd, ifd, &offset, count);
961
962	# elif __freebsd
963	/*
964	* Of course, the freebsd sendfile is a dire hack with no thoughts
965	* wasted on making it similar to other I/O functions.
966	*/
967	{
968	off_t sbytes;
969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
970
971	if (res < 0 && sbytes)
972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
973	res = sbytes;
974	}
975
976	# elif __hpux
977	res = sendfile (ofd, ifd, offset, count, 0, 0);
978
979	# elif __solaris
980	{
981	struct sendfilevec vec;
982	size_t sbytes;
983
984	vec.sfv_fd = ifd;
985	vec.sfv_flag = 0;
986	vec.sfv_off = offset;
987	vec.sfv_len = count;
988
989	res = sendfilev (ofd, &vec, 1, &sbytes);
990
991	if (res < 0 && sbytes)
992	res = sbytes;
993	}
994
995	# endif
996	#else
997	res = -1;
998	errno = ENOSYS;
999	#endif
1000
1001	if (res < 0
1002	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1003	#if __solaris
1004	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
1005	#endif
1006	)
1007	)
1008	{
1009	/* emulate sendfile. this is a major pain in the ass */
1010	dBUF;
1011
1012	res = 0;
1013
1014	while (count)
1015	{
1016	ssize_t cnt;
1017
1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
1019
1020	if (cnt <= 0)
1021	{
1022	if (cnt && !res) res = -1;
1023	break;
1024	}
1025
1026	cnt = write (ofd, aio_buf, cnt);
1027
1028	if (cnt <= 0)
1029	{
1030	if (cnt && !res) res = -1;
1031	break;
1032	}
1033
1034	offset += cnt;
1035	res += cnt;
1036	count -= cnt;
1037	}
1038	}
1039
1040	return res;
1041	}
1042
1043	/* read a full directory */
1044	static void scandir_ (aio_req req, worker *self)
1045	{
1046	DIR *dirp;
1047	union
1048	{
1049	struct dirent d;
1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
1051	} *u;
1052	struct dirent *entp;
1053	char *name, *names;
1054	int memlen = 4096;
1055	int memofs = 0;
1056	int res = 0;
1057	int errorno;
1058
1059	LOCK (wrklock);
1060	self->dirp = dirp = opendir (req->ptr1);
1061	self->dbuf = u = malloc (sizeof (*u));
1062	req->flags |= FLAG_PTR2_FREE;
1063	req->ptr2 = names = malloc (memlen);
1064	UNLOCK (wrklock);
1065
1066	if (dirp && u && names)
1067	for (;;)
1068	{
1069	errno = 0;
1070	readdir_r (dirp, &u->d, &entp);
1071
1072	if (!entp)
1073	break;
1074
1075	name = entp->d_name;
1076
1077	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1078	{
1079	int len = strlen (name) + 1;
1080
1081	res++;
1082
1083	while (memofs + len > memlen)
1084	{
1085	memlen *= 2;
1086	LOCK (wrklock);
1087	req->ptr2 = names = realloc (names, memlen);
1088	UNLOCK (wrklock);
1089
1090	if (!names)
1091	break;
1092	}
1093
1094	memcpy (names + memofs, name, len);
1095	memofs += len;
1096	}
1097	}
1098
1099	if (errno)
1100	res = -1;
1101
1102	req->result = res;
1103	}
1104
1105	/*****************************************************************************/
1106
1107	static void *aio_proc (void *thr_arg)
1108	{
1109	aio_req req;
1110	struct timespec ts;
1111	worker *self = (worker *)thr_arg;
1112
1113	/* try to distribute timeouts somewhat evenly */
1114	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1115	* (1000000000UL / 1024UL);
1116
1117	for (;;)
1118	{
1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1120
1121	LOCK (reqlock);
1122
1123	for (;;)
1124	{
1125	self->req = req = reqq_shift (&req_queue);
1126
1127	if (req)
1128	break;
1129
1130	++idle;
1131
1132	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1133	== ETIMEDOUT)
1134	{
1135	if (idle > max_idle)
1136	{
1137	--idle;
1138	UNLOCK (reqlock);
1139	LOCK (wrklock);
1140	--started;
1141	UNLOCK (wrklock);
1142	goto quit;
1143	}
1144
1145	/* we are allowed to idle, so do so without any timeout */
1146	pthread_cond_wait (&reqwait, &reqlock);
1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1148	}
1149
1150	--idle;
1151	}
1152
1153	--nready;
1154
1155	UNLOCK (reqlock);
1156
1157	errno = 0; /* strictly unnecessary */
1158
1159	if (!(req->flags & FLAG_CANCELLED))
1160	switch (req->type)
1161	{
1162	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1164
1165	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1167
1168	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1169	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1171
1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1173	case REQ_CLOSE: req->result = close (req->int1); break;
1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1176	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1177	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1178	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1179	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1180	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1181
1182	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1183	case REQ_FSYNC: req->result = fsync (req->int1); break;
1184	case REQ_READDIR: scandir_ (req, self); break;
1185
1186	case REQ_BUSY:
1187	{
1188	struct timeval tv;
1189
1190	tv.tv_sec = req->int1;
1191	tv.tv_usec = req->int2;
1192
1193	req->result = select (0, 0, 0, 0, &tv);
1194	}
1195
1196	case REQ_GROUP:
1197	case REQ_NOP:
1198	break;
1199
1200	case REQ_QUIT:
1201	goto quit;
1202
1203	default:
1204	req->result = ENOSYS;
1205	break;
1206	}
1207
1208	req->errorno = errno;
1209
1210	LOCK (reslock);
1211
1212	++npending;
1213
1214	if (!reqq_push (&res_queue, req))
1215	{
1216	/* write a dummy byte to the pipe so fh becomes ready */
1217	write (respipe [1], &respipe, 1);
1218
1219	/* optionally signal the main thread asynchronously */
1220	if (main_sig)
1221	pthread_kill (main_tid, main_sig);
1222	}
1223
1224	self->req = 0;
1225	worker_clear (self);
1226
1227	UNLOCK (reslock);
1228	}
1229
1230	quit:
1231	LOCK (wrklock);
1232	worker_free (self);
1233	UNLOCK (wrklock);
1234
1235	return 0;
1236	}
1237
1238	/*****************************************************************************/
1239
1240	static void atfork_prepare (void)
1241	{
1242	LOCK (wrklock);
1243	LOCK (reqlock);
1244	LOCK (reslock);
1245	#if !HAVE_PREADWRITE
1246	LOCK (preadwritelock);
1247	#endif
1248	#if !HAVE_READDIR_R
1249	LOCK (readdirlock);
1250	#endif
1251	}
1252
1253	static void atfork_parent (void)
1254	{
1255	#if !HAVE_READDIR_R
1256	UNLOCK (readdirlock);
1257	#endif
1258	#if !HAVE_PREADWRITE
1259	UNLOCK (preadwritelock);
1260	#endif
1261	UNLOCK (reslock);
1262	UNLOCK (reqlock);
1263	UNLOCK (wrklock);
1264	}	485	}
1265		486
1266	static void atfork_child (void)	487	static void atfork_child (void)
1267	{	488	{
1268	aio_req prv;
1269
1270	while (prv = reqq_shift (&req_queue))
1271	req_free (prv);
1272
1273	while (prv = reqq_shift (&res_queue))
1274	req_free (prv);
1275
1276	while (wrk_first.next != &wrk_first)
1277	{
1278	worker *wrk = wrk_first.next;
1279
1280	if (wrk->req)
1281	req_free (wrk->req);
1282
1283	worker_clear (wrk);
1284	worker_free (wrk);
1285	}
1286
1287	started = 0;
1288	idle = 0;
1289	nreqs = 0;
1290	nready = 0;
1291	npending = 0;
1292
1293	close (respipe [0]);
1294	close (respipe [1]);
1295	create_pipe ();	489	create_respipe ();
		490	}
1296		491
1297	atfork_parent ();	492	static SV *
		493	get_cb (SV *cb_sv)
		494	{
		495	SvGETMAGIC (cb_sv);
		496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1298	}	497	}
1299		498
1300	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
1301	aio_req req; \	501	aio_req req; \
1302	int req_pri = next_pri; \	502	int req_pri = next_pri; \
1303	next_pri = DEFAULT_PRI + PRI_BIAS; \	503	next_pri = EIO_PRI_DEFAULT; \
1304	\	504	\
1305	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
1306	croak ("callback must be undef or of reference type"); \
1307	\	506	\
1308	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
1309	if (!req) \	508	if (!req) \
1310	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
1311	\	510	\
1312	req->callback = newSVsv (callback); \	511	req->callback = SvREFCNT_inc (cb_cv); \
1313	req->pri = req_pri	512	req->pri = req_pri
1314		513
1315	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
1316	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
1317	\	518	\
1318	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
1319	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
1320		521
1321	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
1322		523
1323	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
1324		525
1325	BOOT:	526	BOOT:
1326	{	527	{
		528	static const struct {
		529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
		542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		549
		550	const_eio (MS_ASYNC)
		551	const_eio (MS_INVALIDATE)
		552	const_eio (MS_SYNC)
		553
		554	const_eio (MT_MODIFY)
		555
		556	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		557	const_eio (SYNC_FILE_RANGE_WRITE)
		558	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		559
		560	const_eio (READDIR_DENTS)
		561	const_eio (READDIR_DIRS_FIRST)
		562	const_eio (READDIR_STAT_ORDER)
		563	const_eio (READDIR_FOUND_UNKNOWN)
		564
		565	const_eio (DT_UNKNOWN)
		566	const_eio (DT_FIFO)
		567	const_eio (DT_CHR)
		568	const_eio (DT_DIR)
		569	const_eio (DT_BLK)
		570	const_eio (DT_REG)
		571	const_eio (DT_LNK)
		572	const_eio (DT_SOCK)
		573	const_eio (DT_WHT)
		574	};
		575
1327	HV *stash = gv_stashpv ("IO::AIO", 1);	576	aio_stash = gv_stashpv ("IO::AIO" , 1);
		577	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		578	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1328		579
1329	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	580	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1330	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	581	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1331	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1332	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1333	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1334	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1335	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1336		582
1337	create_pipe ();	583	create_respipe ();
1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	584
		585	if (eio_init (want_poll, done_poll) < 0)
		586	croak ("IO::AIO: unable to initialise eio library");
		587
		588	/* atfork child called in fifo order, so before eio's handler */
		589	X_THREAD_ATFORK (0, 0, atfork_child);
1339	}	590	}
1340		591
1341	void	592	void
1342	max_poll_reqs (int nreqs)	593	max_poll_reqs (int nreqs)
1343	PROTOTYPE: $	594	PROTOTYPE: $
1344	CODE:	595	CODE:
1345	max_poll_reqs = nreqs;	596	eio_set_max_poll_reqs (nreqs);
1346		597
1347	void	598	void
1348	max_poll_time (double nseconds)	599	max_poll_time (double nseconds)
1349	PROTOTYPE: $	600	PROTOTYPE: $
1350	CODE:	601	CODE:
1351	max_poll_time = nseconds * AIO_TICKS;	602	eio_set_max_poll_time (nseconds);
1352		603
1353	void	604	void
1354	min_parallel (int nthreads)	605	min_parallel (int nthreads)
1355	PROTOTYPE: $	606	PROTOTYPE: $
		607	CODE:
		608	eio_set_min_parallel (nthreads);
1356		609
1357	void	610	void
1358	max_parallel (int nthreads)	611	max_parallel (int nthreads)
1359	PROTOTYPE: $	612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_parallel (nthreads);
1360		615
1361	void	616	void
1362	max_idle (int nthreads)	617	max_idle (int nthreads)
1363	PROTOTYPE: $	618	PROTOTYPE: $
1364	CODE:	619	CODE:
1365	set_max_idle (nthreads);	620	eio_set_max_idle (nthreads);
1366		621
1367	int	622	void
1368	max_outstanding (int maxreqs)	623	max_outstanding (int maxreqs)
1369	PROTOTYPE: $	624	PROTOTYPE: $
1370	CODE:	625	CODE:
1371	RETVAL = max_outstanding;
1372	max_outstanding = maxreqs;	626	max_outstanding = maxreqs;
1373	OUTPUT:
1374	RETVAL
1375		627
1376	void	628	void
1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	629	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1378	SV8 * pathname
1379	int flags
1380	int mode
1381	SV * callback
1382	PROTOTYPE: $$$;$	630	PROTOTYPE: $$$;$
1383	PPCODE:	631	PPCODE:
1384	{	632	{
1385	dREQ;	633	dREQ;
1386		634
1387	req->type = REQ_OPEN;	635	req->type = EIO_OPEN;
1388	req->sv1 = newSVsv (pathname);	636	req->sv1 = newSVsv (pathname);
1389	req->ptr1 = SvPVbyte_nolen (req->sv1);	637	req->ptr1 = SvPVbyte_nolen (req->sv1);
1390	req->int1 = flags;	638	req->int1 = flags;
1391	req->mode = mode;	639	req->int2 = mode;
1392		640
1393	REQ_SEND;	641	REQ_SEND;
1394	}	642	}
1395		643
1396	void	644	void
1397	aio_close (fh,callback=&PL_sv_undef)	645	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1398	SV * fh
1399	SV * callback
1400	PROTOTYPE: $;$	646	PROTOTYPE: $;$
1401	ALIAS:	647	ALIAS:
1402	aio_close = REQ_CLOSE
1403	aio_fsync = REQ_FSYNC	648	aio_fsync = EIO_FSYNC
1404	aio_fdatasync = REQ_FDATASYNC	649	aio_fdatasync = EIO_FDATASYNC
1405	PPCODE:	650	PPCODE:
1406	{	651	{
		652	int fd = s_fileno_croak (fh, 0);
1407	dREQ;	653	dREQ;
1408		654
1409	req->type = ix;	655	req->type = ix;
1410	req->fh = newSVsv (fh);	656	req->sv1 = newSVsv (fh);
1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	657	req->int1 = fd;
1412		658
1413	REQ_SEND (req);	659	REQ_SEND (req);
1414	}	660	}
1415		661
1416	void	662	void
		663	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		664	PROTOTYPE: $$$$;$
		665	PPCODE:
		666	{
		667	int fd = s_fileno_croak (fh, 0);
		668	dREQ;
		669
		670	req->type = EIO_SYNC_FILE_RANGE;
		671	req->sv1 = newSVsv (fh);
		672	req->int1 = fd;
		673	req->offs = offset;
		674	req->size = nbytes;
		675	req->int2 = flags;
		676
		677	REQ_SEND (req);
		678	}
		679
		680	void
		681	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		682	PROTOTYPE: $;$
		683	PPCODE:
		684	{
		685	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		686	int fd = s_fileno_croak (fh, 0);
		687	dREQ;
		688
		689	if (close_pipe < 0)
		690	{
		691	int pipefd [2];
		692
		693	if (pipe (pipefd) < 0
		694	|| close (pipefd [1]) < 0
		695	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		696	abort (); /*D*/
		697
		698	close_pipe = pipefd [0];
		699	}
		700
		701	req->type = EIO_DUP2;
		702	req->int1 = close_pipe;
		703	req->sv2 = newSVsv (fh);
		704	req->int2 = fd;
		705
		706	REQ_SEND (req);
		707	}
		708
		709	void
1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	710	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1418	SV * fh
1419	UV offset
1420	UV length
1421	SV8 * data
1422	UV dataoffset
1423	SV * callback
1424	ALIAS:	711	ALIAS:
1425	aio_read = REQ_READ	712	aio_read = EIO_READ
1426	aio_write = REQ_WRITE	713	aio_write = EIO_WRITE
1427	PROTOTYPE: $$$$$;$	714	PROTOTYPE: $$$$$;$
1428	PPCODE:	715	PPCODE:
1429	{	716	{
1430	STRLEN svlen;	717	STRLEN svlen;
		718	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1431	char *svptr = SvPVbyte (data, svlen);	719	char *svptr = SvPVbyte (data, svlen);
1432		720	UV len = SvUV (length);
1433	SvUPGRADE (data, SVt_PV);
1434	SvPOK_on (data);
1435		721
1436	if (dataoffset < 0)	722	if (dataoffset < 0)
1437	dataoffset += svlen;	723	dataoffset += svlen;
1438		724
1439	if (dataoffset < 0 || dataoffset > svlen)	725	if (dataoffset < 0 || dataoffset > svlen)
1440	croak ("data offset outside of string");	726	croak ("dataoffset outside of data scalar");
1441		727
1442	if (ix == REQ_WRITE)	728	if (ix == EIO_WRITE)
1443	{	729	{
1444	/* write: check length and adjust. */	730	/* write: check length and adjust. */
1445	if (length < 0 || length + dataoffset > svlen)	731	if (!SvOK (length) || len + dataoffset > svlen)
1446	length = svlen - dataoffset;	732	len = svlen - dataoffset;
1447	}	733	}
1448	else	734	else
1449	{	735	{
1450	/* read: grow scalar as necessary */	736	/* read: check type and grow scalar as necessary */
		737	SvUPGRADE (data, SVt_PV);
1451	svptr = SvGROW (data, length + dataoffset);	738	svptr = SvGROW (data, len + dataoffset + 1);
1452	}	739	}
1453
1454	if (length < 0)
1455	croak ("length must not be negative");
1456		740
1457	{	741	{
1458	dREQ;	742	dREQ;
1459		743
1460	req->type = ix;	744	req->type = ix;
1461	req->fh = newSVsv (fh);	745	req->sv1 = newSVsv (fh);
1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	746	req->int1 = fd;
1463	: IoOFP (sv_2io (fh)));	747	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1464	req->offs = offset;
1465	req->size = length;	748	req->size = len;
1466	req->sv1 = SvREFCNT_inc (data);	749	req->sv2 = SvREFCNT_inc (data);
1467	req->ptr1 = (char *)svptr + dataoffset;	750	req->ptr2 = (char *)svptr + dataoffset;
1468	req->stroffset = dataoffset;	751	req->stroffset = dataoffset;
1469		752
1470	if (!SvREADONLY (data))	753	if (!SvREADONLY (data))
1471	{	754	{
1472	SvREADONLY_on (data);	755	SvREADONLY_on (data);
1473	req->flags |= FLAG_SV1_RO_OFF;	756	req->flags |= FLAG_SV2_RO_OFF;
1474	}	757	}
1475		758
1476	REQ_SEND;	759	REQ_SEND;
1477	}	760	}
1478	}	761	}
1479		762
1480	void	763	void
1481	aio_readlink (path,callback=&PL_sv_undef)	764	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1482	SV8 * path
1483	SV * callback
1484	PROTOTYPE: $$;$	765	PROTOTYPE: $$;$
1485	PPCODE:	766	PPCODE:
1486	{	767	{
1487	SV *data;	768	SV *data;
1488	dREQ;	769	dREQ;
1489		770
1490	data = newSV (NAME_MAX);
1491	SvPOK_on (data);
1492
1493	req->type = REQ_READLINK;	771	req->type = EIO_READLINK;
1494	req->fh = newSVsv (path);	772	req->sv1 = newSVsv (path);
1495	req->ptr2 = SvPVbyte_nolen (req->fh);	773	req->ptr1 = SvPVbyte_nolen (req->sv1);
1496	req->sv1 = data;
1497	req->ptr1 = SvPVbyte_nolen (data);
1498		774
1499	REQ_SEND;	775	REQ_SEND;
1500	}	776	}
1501		777
1502	void	778	void
1503	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	779	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1504	SV * out_fh
1505	SV * in_fh
1506	UV in_offset
1507	UV length
1508	SV * callback
1509	PROTOTYPE: $$$$;$	780	PROTOTYPE: $$$$;$
1510	PPCODE:	781	PPCODE:
1511	{	782	{
		783	int ifd = s_fileno_croak (in_fh , 0);
		784	int ofd = s_fileno_croak (out_fh, 1);
1512	dREQ;	785	dREQ;
1513		786
1514	req->type = REQ_SENDFILE;	787	req->type = EIO_SENDFILE;
1515	req->fh = newSVsv (out_fh);	788	req->sv1 = newSVsv (out_fh);
1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	789	req->int1 = ofd;
1517	req->sv2 = newSVsv (in_fh);	790	req->sv2 = newSVsv (in_fh);
1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	791	req->int2 = ifd;
1519	req->offs = in_offset;	792	req->offs = in_offset;
1520	req->size = length;	793	req->size = length;
1521		794
1522	REQ_SEND;	795	REQ_SEND;
1523	}	796	}
1524		797
1525	void	798	void
1526	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	799	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1527	SV * fh
1528	UV offset
1529	IV length
1530	SV * callback
1531	PROTOTYPE: $$$;$	800	PROTOTYPE: $$$;$
1532	PPCODE:	801	PPCODE:
1533	{	802	{
		803	int fd = s_fileno_croak (fh, 0);
1534	dREQ;	804	dREQ;
1535		805
1536	req->type = REQ_READAHEAD;	806	req->type = EIO_READAHEAD;
1537	req->fh = newSVsv (fh);	807	req->sv1 = newSVsv (fh);
1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	808	req->int1 = fd;
1539	req->offs = offset;	809	req->offs = offset;
1540	req->size = length;	810	req->size = length;
1541		811
1542	REQ_SEND;	812	REQ_SEND;
1543	}	813	}
1544		814
1545	void	815	void
1546	aio_stat (fh_or_path,callback=&PL_sv_undef)	816	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1547	SV8 * fh_or_path
1548	SV * callback
1549	ALIAS:	817	ALIAS:
1550	aio_stat = REQ_STAT	818	aio_stat = EIO_STAT
1551	aio_lstat = REQ_LSTAT	819	aio_lstat = EIO_LSTAT
1552	PPCODE:	820	PPCODE:
1553	{	821	{
1554	dREQ;	822	dREQ;
1555		823
1556	req->ptr2 = malloc (sizeof (Stat_t));	824	req->sv1 = newSVsv (fh_or_path);
1557	if (!req->ptr2)
1558	{
1559	req_free (req);
1560	croak ("out of memory during aio_stat statdata allocation");
1561	}
1562		825
1563	req->flags |= FLAG_PTR2_FREE;	826	if (SvPOK (req->sv1))
1564
1565	if (SvPOK (fh_or_path))
1566	{	827	{
1567	req->type = ix;	828	req->type = ix;
1568	req->sv1 = newSVsv (fh_or_path);
1569	req->ptr1 = SvPVbyte_nolen (req->sv1);	829	req->ptr1 = SvPVbyte_nolen (req->sv1);
1570	}	830	}
1571	else	831	else
1572	{	832	{
1573	req->type = REQ_FSTAT;	833	req->type = EIO_FSTAT;
1574	req->fh = newSVsv (fh_or_path);
1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	834	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1576	}	835	}
1577		836
1578	REQ_SEND;	837	REQ_SEND;
1579	}	838	}
1580		839
1581	void	840	void
		841	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		842	PPCODE:
		843	{
		844	dREQ;
		845
		846	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		847	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
		851	{
		852	req->type = EIO_UTIME;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FUTIME;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->sv1 = newSVsv (fh_or_path);
		871	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		872
		873	if (SvPOK (req->sv1))
		874	{
		875	req->type = EIO_TRUNCATE;
		876	req->ptr1 = SvPVbyte_nolen (req->sv1);
		877	}
		878	else
		879	{
		880	req->type = EIO_FTRUNCATE;
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	}
		883
		884	REQ_SEND;
		885	}
		886
		887	void
		888	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		889	ALIAS:
		890	aio_chmod = EIO_CHMOD
		891	aio_mkdir = EIO_MKDIR
		892	PPCODE:
		893	{
		894	dREQ;
		895
		896	req->int2 = mode;
		897	req->sv1 = newSVsv (fh_or_path);
		898
		899	if (SvPOK (req->sv1))
		900	{
		901	req->type = ix;
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	}
		904	else
		905	{
		906	req->type = EIO_FCHMOD;
		907	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		908	}
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		915	PPCODE:
		916	{
		917	dREQ;
		918
		919	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		920	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		921	req->sv1 = newSVsv (fh_or_path);
		922
		923	if (SvPOK (req->sv1))
		924	{
		925	req->type = EIO_CHOWN;
		926	req->ptr1 = SvPVbyte_nolen (req->sv1);
		927	}
		928	else
		929	{
		930	req->type = EIO_FCHOWN;
		931	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		932	}
		933
		934	REQ_SEND;
		935	}
		936
		937	void
		938	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = EIO_READDIR;
		944	req->sv1 = newSVsv (pathname);
		945	req->ptr1 = SvPVbyte_nolen (req->sv1);
		946	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		947
		948	if (flags & EIO_READDIR_DENTS)
		949	req->int1 |= EIO_READDIR_CUSTOM2;
		950
		951	REQ_SEND;
		952	}
		953
		954	void
1582	aio_unlink (pathname,callback=&PL_sv_undef)	955	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1583	SV8 * pathname
1584	SV * callback
1585	ALIAS:	956	ALIAS:
1586	aio_unlink = REQ_UNLINK	957	aio_unlink = EIO_UNLINK
1587	aio_rmdir = REQ_RMDIR	958	aio_rmdir = EIO_RMDIR
1588	aio_readdir = REQ_READDIR	959	aio_readdir = EIO_READDIR
1589	PPCODE:	960	PPCODE:
1590	{	961	{
1591	dREQ;	962	dREQ;
1592		963
1593	req->type = ix;	964	req->type = ix;
…		…
1596		967
1597	REQ_SEND;	968	REQ_SEND;
1598	}	969	}
1599		970
1600	void	971	void
1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)	972	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1602	SV8 * oldpath
1603	SV8 * newpath
1604	SV * callback
1605	ALIAS:	973	ALIAS:
1606	aio_link = REQ_LINK	974	aio_link = EIO_LINK
1607	aio_symlink = REQ_SYMLINK	975	aio_symlink = EIO_SYMLINK
1608	aio_rename = REQ_RENAME	976	aio_rename = EIO_RENAME
1609	PPCODE:	977	PPCODE:
1610	{	978	{
1611	dREQ;	979	dREQ;
1612		980
1613	req->type = ix;	981	req->type = ix;
1614	req->fh = newSVsv (oldpath);	982	req->sv1 = newSVsv (oldpath);
1615	req->ptr2 = SvPVbyte_nolen (req->fh);
1616	req->sv1 = newSVsv (newpath);
1617	req->ptr1 = SvPVbyte_nolen (req->sv1);	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984	req->sv2 = newSVsv (newpath);
		985	req->ptr2 = SvPVbyte_nolen (req->sv2);
1618		986
1619	REQ_SEND;	987	REQ_SEND;
1620	}	988	}
1621		989
1622	void	990	void
1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	991	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1624	SV8 * pathname
1625	SV * callback
1626	UV mode
1627	UV dev
1628	PPCODE:	992	PPCODE:
1629	{	993	{
1630	dREQ;	994	dREQ;
1631		995
1632	req->type = REQ_MKNOD;	996	req->type = EIO_MKNOD;
1633	req->sv1 = newSVsv (pathname);	997	req->sv1 = newSVsv (pathname);
1634	req->ptr1 = SvPVbyte_nolen (req->sv1);	998	req->ptr1 = SvPVbyte_nolen (req->sv1);
1635	req->mode = (mode_t)mode;	999	req->int2 = (mode_t)mode;
1636	req->offs = dev;	1000	req->offs = dev;
1637		1001
1638	REQ_SEND;	1002	REQ_SEND;
1639	}	1003	}
1640		1004
1641	void	1005	void
		1006	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1007	ALIAS:
		1008	aio_mtouch = EIO_MTOUCH
		1009	aio_msync = EIO_MSYNC
		1010	PROTOTYPE: $$$$;$
		1011	PPCODE:
		1012	{
		1013	STRLEN svlen;
		1014	UV len = SvUV (length);
		1015	char *svptr = SvPVbyte (data, svlen);
		1016
		1017	if (offset < 0)
		1018	offset += svlen;
		1019
		1020	if (offset < 0 || offset > svlen)
		1021	croak ("offset outside of scalar");
		1022
		1023	if (!SvOK (length) || len + offset > svlen)
		1024	len = svlen - offset;
		1025
		1026	{
		1027	dREQ;
		1028
		1029	req->type = ix;
		1030	req->size = len;
		1031	req->sv2 = SvREFCNT_inc (data);
		1032	req->ptr2 = (char *)svptr + offset;
		1033	req->int1 = flags;
		1034
		1035	REQ_SEND;
		1036	}
		1037	}
		1038
		1039	void
1642	aio_busy (delay,callback=&PL_sv_undef)	1040	aio_busy (double delay, SV *callback=&PL_sv_undef)
1643	double delay
1644	SV * callback
1645	PPCODE:	1041	PPCODE:
1646	{	1042	{
1647	dREQ;	1043	dREQ;
1648		1044
1649	req->type = REQ_BUSY;	1045	req->type = EIO_BUSY;
1650	req->int1 = delay < 0. ? 0 : delay;	1046	req->nv1 = delay < 0. ? 0. : delay;
1651	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1652		1047
1653	REQ_SEND;	1048	REQ_SEND;
1654	}	1049	}
1655		1050
1656	void	1051	void
1657	aio_group (callback=&PL_sv_undef)	1052	aio_group (SV *callback=&PL_sv_undef)
1658	SV * callback
1659	PROTOTYPE: ;$	1053	PROTOTYPE: ;$
1660	PPCODE:	1054	PPCODE:
1661	{	1055	{
1662	dREQ;	1056	dREQ;
1663		1057
1664	req->type = REQ_GROUP;	1058	req->type = EIO_GROUP;
1665		1059
1666	req_send (req);	1060	req_submit (req);
1667	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1061	XPUSHs (req_sv (req, aio_grp_stash));
1668	}	1062	}
1669		1063
1670	void	1064	void
1671	aio_nop (callback=&PL_sv_undef)	1065	aio_nop (SV *callback=&PL_sv_undef)
1672	SV * callback	1066	ALIAS:
		1067	aio_nop = EIO_NOP
		1068	aio_sync = EIO_SYNC
1673	PPCODE:	1069	PPCODE:
1674	{	1070	{
1675	dREQ;	1071	dREQ;
1676		1072
1677	req->type = REQ_NOP;	1073	req->type = ix;
1678		1074
1679	REQ_SEND;	1075	REQ_SEND;
1680	}	1076	}
1681		1077
1682	int	1078	int
1683	aioreq_pri (int pri = 0)	1079	aioreq_pri (int pri = 0)
1684	PROTOTYPE: ;$	1080	PROTOTYPE: ;$
1685	CODE:	1081	CODE:
1686	RETVAL = next_pri - PRI_BIAS;	1082	RETVAL = next_pri;
1687	if (items > 0)	1083	if (items > 0)
1688	{	1084	{
1689	if (pri < PRI_MIN) pri = PRI_MIN;	1085	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1690	if (pri > PRI_MAX) pri = PRI_MAX;	1086	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1691	next_pri = pri + PRI_BIAS;	1087	next_pri = pri;
1692	}	1088	}
1693	OUTPUT:	1089	OUTPUT:
1694	RETVAL	1090	RETVAL
1695		1091
1696	void	1092	void
1697	aioreq_nice (int nice = 0)	1093	aioreq_nice (int nice = 0)
1698	CODE:	1094	CODE:
1699	nice = next_pri - nice;	1095	nice = next_pri - nice;
1700	if (nice < PRI_MIN) nice = PRI_MIN;	1096	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1701	if (nice > PRI_MAX) nice = PRI_MAX;	1097	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1702	next_pri = nice + PRI_BIAS;	1098	next_pri = nice;
1703		1099
1704	void	1100	void
1705	flush ()	1101	flush ()
1706	PROTOTYPE:	1102	PROTOTYPE:
1707	CODE:	1103	CODE:
1708	while (nreqs)	1104	while (eio_nreqs ())
1709	{	1105	{
1710	poll_wait ();	1106	poll_wait ();
1711	poll_cb ();	1107	poll_cb ();
1712	}	1108	}
1713		1109
…		…
1722		1118
1723	int	1119	int
1724	poll_fileno()	1120	poll_fileno()
1725	PROTOTYPE:	1121	PROTOTYPE:
1726	CODE:	1122	CODE:
1727	RETVAL = respipe [0];	1123	RETVAL = s_epipe_fd (&respipe);
1728	OUTPUT:	1124	OUTPUT:
1729	RETVAL	1125	RETVAL
1730		1126
1731	int	1127	int
1732	poll_cb(...)	1128	poll_cb(...)
…		…
1740	poll_wait()	1136	poll_wait()
1741	PROTOTYPE:	1137	PROTOTYPE:
1742	CODE:	1138	CODE:
1743	poll_wait ();	1139	poll_wait ();
1744		1140
1745	void
1746	setsig (int signum = SIGIO)
1747	PROTOTYPE: ;$
1748	CODE:
1749	{
1750	if (block_sig_level)
1751	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1752
1753	LOCK (reslock);
1754	main_tid = pthread_self ();
1755	main_sig = signum;
1756	UNLOCK (reslock);
1757
1758	if (main_sig && npending)
1759	pthread_kill (main_tid, main_sig);
1760	}
1761
1762	void
1763	aio_block (SV *cb)
1764	PROTOTYPE: &
1765	PPCODE:
1766	{
1767	int count;
1768
1769	block_sig ();
1770	PUSHMARK (SP);
1771	PUTBACK;
1772	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1773	SPAGAIN;
1774	unblock_sig ();
1775
1776	if (SvTRUE (ERRSV))
1777	croak (0);
1778
1779	XSRETURN (count);
1780	}
1781
1782	int	1141	int
1783	nreqs()	1142	nreqs()
1784	PROTOTYPE:	1143	PROTOTYPE:
1785	CODE:	1144	CODE:
1786	RETVAL = nreqs;	1145	RETVAL = eio_nreqs ();
1787	OUTPUT:	1146	OUTPUT:
1788	RETVAL	1147	RETVAL
1789		1148
1790	int	1149	int
1791	nready()	1150	nready()
1792	PROTOTYPE:	1151	PROTOTYPE:
1793	CODE:	1152	CODE:
1794	RETVAL = get_nready ();	1153	RETVAL = eio_nready ();
1795	OUTPUT:	1154	OUTPUT:
1796	RETVAL	1155	RETVAL
1797		1156
1798	int	1157	int
1799	npending()	1158	npending()
1800	PROTOTYPE:	1159	PROTOTYPE:
1801	CODE:	1160	CODE:
1802	RETVAL = get_npending ();	1161	RETVAL = eio_npending ();
1803	OUTPUT:	1162	OUTPUT:
1804	RETVAL	1163	RETVAL
1805		1164
1806	int	1165	int
1807	nthreads()	1166	nthreads()
1808	PROTOTYPE:	1167	PROTOTYPE:
1809	CODE:	1168	CODE:
1810	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1169	RETVAL = eio_nthreads ();
1811	RETVAL = started;
1812	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1813	OUTPUT:	1170	OUTPUT:
1814	RETVAL	1171	RETVAL
1815		1172
		1173	int
		1174	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1175	PROTOTYPE: $$$$
		1176	CODE:
		1177	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1178	RETVAL = posix_fadvise (fh, offset, length, advice);
		1179	#else
		1180	RETVAL = errno = ENOSYS;
		1181	#endif
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	ssize_t
		1186	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1187	PROTOTYPE: $$$$
		1188	CODE:
		1189	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1190	OUTPUT:
		1191	RETVAL
		1192
		1193	void _on_next_submit (SV *cb)
		1194	CODE:
		1195	SvREFCNT_dec (on_next_submit);
		1196	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1197
1816	PROTOTYPES: DISABLE	1198	PROTOTYPES: DISABLE
1817		1199
1818	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1200	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1819		1201
1820	void	1202	void
1821	cancel (aio_req_ornot req)	1203	cancel (aio_req_ornot req)
1822	CODE:	1204	CODE:
1823	req_cancel (req);	1205	eio_cancel (req);
1824		1206
1825	void	1207	void
1826	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1208	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1827	CODE:	1209	PPCODE:
		1210	{
		1211	if (GIMME_V != G_VOID)
		1212	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1213
		1214	if (items > 1)
		1215	{
		1216	SV *cb_cv =get_cb (callback);
		1217
1828	SvREFCNT_dec (req->callback);	1218	SvREFCNT_dec (req->callback);
1829	req->callback = newSVsv (callback);	1219	req->callback = SvREFCNT_inc (cb_cv);
		1220	}
		1221	}
1830		1222
1831	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1223	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1832		1224
1833	void	1225	void
1834	add (aio_req grp, ...)	1226	add (aio_req grp, ...)
1835	PPCODE:	1227	PPCODE:
1836	{	1228	{
1837	int i;	1229	int i;
1838	aio_req req;
1839
1840	if (main_sig && !block_sig_level)
1841	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1842		1230
1843	if (grp->int1 == 2)	1231	if (grp->int1 == 2)
1844	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1232	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1845		1233
1846	for (i = 1; i < items; ++i )	1234	for (i = 1; i < items; ++i )
1847	{	1235	{
		1236	aio_req req;
		1237
1848	if (GIMME_V != G_VOID)	1238	if (GIMME_V != G_VOID)
1849	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1850		1240
1851	req = SvAIO_REQ (ST (i));	1241	req = SvAIO_REQ (ST (i));
1852		1242
1853	if (req)	1243	if (req)
1854	{	1244	eio_grp_add (grp, req);
1855	++grp->size;
1856	req->grp = grp;
1857
1858	req->grp_prev = 0;
1859	req->grp_next = grp->grp_first;
1860
1861	if (grp->grp_first)
1862	grp->grp_first->grp_prev = req;
1863
1864	grp->grp_first = req;
1865	}
1866	}	1245	}
1867	}	1246	}
1868		1247
1869	void	1248	void
1870	cancel_subs (aio_req_ornot req)	1249	cancel_subs (aio_req_ornot req)
…		…
1879	AV *av;	1258	AV *av;
1880		1259
1881	grp->errorno = errno;	1260	grp->errorno = errno;
1882		1261
1883	av = newAV ();	1262	av = newAV ();
		1263	av_extend (av, items - 1);
1884		1264
1885	for (i = 1; i < items; ++i )	1265	for (i = 1; i < items; ++i )
1886	av_push (av, newSVsv (ST (i)));	1266	av_push (av, newSVsv (ST (i)));
1887		1267
1888	SvREFCNT_dec (grp->sv1);	1268	SvREFCNT_dec (grp->sv1);
…		…
1895	grp->errorno = errorno;	1275	grp->errorno = errorno;
1896		1276
1897	void	1277	void
1898	limit (aio_req grp, int limit)	1278	limit (aio_req grp, int limit)
1899	CODE:	1279	CODE:
1900	grp->int2 = limit;	1280	eio_grp_limit (grp, limit);
1901	aio_grp_feed (grp);
1902		1281
1903	void	1282	void
1904	feed (aio_req grp, SV *callback=&PL_sv_undef)	1283	feed (aio_req grp, SV *callback=&PL_sv_undef)
1905	CODE:	1284	CODE:
1906	{	1285	{
1907	SvREFCNT_dec (grp->sv2);	1286	SvREFCNT_dec (grp->sv2);
1908	grp->sv2 = newSVsv (callback);	1287	grp->sv2 = newSVsv (callback);
		1288	grp->feed = aio_grp_feed;
1909		1289
1910	if (grp->int2 <= 0)	1290	if (grp->int2 <= 0)
1911	grp->int2 = 2;	1291	grp->int2 = 2;
1912		1292
1913	aio_grp_feed (grp);	1293	eio_grp_limit (grp, grp->int2);
1914	}	1294	}
1915		1295

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