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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 1.165 by root, Sun May 9 20:42:55 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>
		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>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
38	# include <sys/uio.h>	68	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
43	# else	186	# else
44	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	188	# endif
46	#endif	189	#endif
47		190	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	191	# define MAP_HUGETLB 0
49	#define IDLE_TIMEOUT 10
50
51	/* used for struct dirent, AIX doesn't provide it */
52	#ifndef NAME_MAX
53	# define NAME_MAX 4096
54	#endif
55
56	#ifndef PTHREAD_STACK_MIN
57	/* care for broken platforms, e.g. windows */
58	# define PTHREAD_STACK_MIN 16384
59	#endif
60
61	#if __ia64
62	# define STACKSIZE 65536
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68
69	/* wether word reads are potentially non-atomic.
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	192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
79	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
80		205
81	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
82	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
83		209
84	#define dBUF \	210	static int req_invoke (eio_req *req);
85	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
86	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		214
92	enum {	215	enum {
93	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
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	};	217	};
105		218
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		220
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;
114	SV *fh, *fh2;
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;
122	int type;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	};
137
138	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
140		223
141	enum {	224	static SV *on_next_submit;
142	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	226	static int max_outstanding;
144		227
145	DEFAULT_PRI = 0,	228	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		229
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);	230	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
301		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
302	/* must be called at most once */	245	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
304	{	247	{
305	if (!req->self)	248	if (!req->self)
306	{	249	{
307	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309	}	252	}
310		253
311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
312	}	255	}
313		256
314	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
315	{	258	{
316	MAGIC *mg;	259	MAGIC *mg;
317		260
318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
319	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
320		266
321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322		268
323	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	270	}
325		271
326	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
327	{	273	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
329	{	275	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	276	dSP;
335		277
336	ENTER;	278	ENTER;
337	SAVETMPS;	279	SAVETMPS;
338	PUSHMARK (SP);	280	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
340	PUTBACK;	282	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	284	SPAGAIN;
343	FREETMPS;	285	FREETMPS;
344	LEAVE;	286	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	}	287	}
355	}	288	}
356		289
357	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
358	{	291	{
359	--grp->length;	292	eio_submit (req);
360		293
361	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	295	{
367	req_invoke (grp);	296	dSP;
368	req_free (grp);	297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
369	}	304	}
370	}	305	}
371		306
372	static void req_invoke (aio_req req)	307	static int req_invoke (eio_req *req)
373	{	308	{
374	dSP;	309	dSP;
375		310
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	311	if (req->flags & FLAG_SV2_RO_OFF)
		312	SvREADONLY_off (req->sv2);
		313
		314	if (!EIO_CANCELLED (req) && req->callback)
377	{	315	{
		316	static SV *sv_result_cache; /* caches the result integer SV */
		317	SV *sv_result;
		318
378	ENTER;	319	ENTER;
379	SAVETMPS;	320	SAVETMPS;
380	PUSHMARK (SP);	321	PUSHMARK (SP);
381	EXTEND (SP, 1);	322	EXTEND (SP, 1);
382		323
		324	/* do not recreate the result IV from scratch each time */
		325	if (expect_true (sv_result_cache))
		326	{
		327	sv_result = sv_result_cache; sv_result_cache = 0;
		328	SvIV_set (sv_result, req->result);
		329	}
		330	else
		331	{
		332	sv_result = newSViv (req->result);
		333	SvREADONLY_on (sv_result);
		334	}
		335
383	switch (req->type)	336	switch (req->type)
384	{	337	{
385	case REQ_READDIR:	338	case EIO_READDIR:
386	{	339	{
387	SV *rv = &PL_sv_undef;	340	SV *rv = &PL_sv_undef;
388		341
389	if (req->result >= 0)	342	if (req->result >= 0)
390	{	343	{
391	int i;	344	int i;
392	char *buf = req->data2ptr;	345	char *names = (char *)req->ptr2;
		346	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	347	AV *av = newAV ();
394		348
395	av_extend (av, req->result - 1);	349	av_extend (av, req->result - 1);
396		350
397	for (i = 0; i < req->result; ++i)	351	for (i = 0; i < req->result; ++i)
398	{	352	{
399	SV *sv = newSVpv (buf, 0);	353	if (req->int1 & EIO_READDIR_DENTS)
		354	{
		355	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		356
		357	if (req->int1 & EIO_READDIR_CUSTOM2)
		358	{
		359	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		360	AV *avent = newAV ();
		361
		362	av_extend (avent, 2);
		363
		364	if (!sv_type [ent->type])
		365	{
		366	sv_type [ent->type] = newSViv (ent->type);
		367	SvREADONLY_on (sv_type [ent->type]);
		368	}
		369
		370	av_store (avent, 0, namesv);
		371	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		372	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		373
		374	av_store (av, i, newRV_noinc ((SV *)avent));
		375	}
		376	else
401	av_store (av, i, sv);	377	av_store (av, i, namesv);
		378
		379	++ent;
		380	}
		381	else
		382	{
		383	SV *name = newSVpv (names, 0);
		384	av_store (av, i, name);
402	buf += SvCUR (sv) + 1;	385	names += SvCUR (name) + 1;
		386	}
403	}	387	}
404		388
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	389	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	390	}
407		391
408	PUSHs (rv);	392	PUSHs (rv);
		393
		394	if (req->int1 & EIO_READDIR_CUSTOM1)
		395	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
409	}	396	}
410	break;	397	break;
411		398
412	case REQ_OPEN:	399	case EIO_OPEN:
413	{	400	{
414	/* convert fd to fh */	401	/* convert fd to fh */
415	SV *fh;	402	SV *fh = &PL_sv_undef;
416		403
417	PUSHs (sv_2mortal (newSViv (req->result)));	404	if (req->result >= 0)
418	PUTBACK;	405	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	406	GV *gv = (GV *)sv_newmortal ();
420	SPAGAIN;	407	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		408	char sym [64];
		409	int symlen;
		410
		411	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		412	gv_init (gv, aio_stash, sym, symlen, 0);
421		413
422	fh = SvREFCNT_inc (POPs);	414	symlen = snprintf (
		415	sym,
		416	sizeof (sym),
		417	"%s&=%d",
		418	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		419	(int)req->result
		420	);
423		421
		422	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		423	fh = (SV *)gv;
		424	}
		425
424	PUSHMARK (SP);	426	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	427	}
427	break;	428	break;
428		429
		430	case EIO_STATVFS:
		431	case EIO_FSTATVFS:
		432	{
		433	SV *rv = &PL_sv_undef;
		434
		435	if (req->result >= 0)
		436	{
		437	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		438	HV *hv = newHV ();
		439
		440	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		441
		442	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		443	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		444	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		445	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		446	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		447	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		448	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		449	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		450	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		451	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		452	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		453	}
		454
		455	PUSHs (rv);
		456	}
		457
		458	break;
		459
429	case REQ_GROUP:	460	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	461	req->int1 = 2; /* mark group as finished */
431		462
432	if (req->data)	463	if (req->sv1)
433	{	464	{
434	int i;	465	int i;
435	AV *av = (AV *)req->data;	466	AV *av = (AV *)req->sv1;
436		467
437	EXTEND (SP, AvFILL (av) + 1);	468	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	469	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	470	PUSHs (*av_fetch (av, i, 0));
440	}	471	}
441	break;	472	break;
442		473
443	case REQ_NOP:	474	case EIO_NOP:
444	case REQ_BUSY:	475	case EIO_BUSY:
445	break;	476	break;
446		477
		478	case EIO_READLINK:
		479	if (req->result > 0)
		480	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		481	break;
		482
		483	case EIO_STAT:
		484	case EIO_LSTAT:
		485	case EIO_FSTAT:
		486	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		487	PL_laststatval = req->result;
		488	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		489	PUSHs (sv_result);
		490	break;
		491
		492	case EIO_READ:
		493	{
		494	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		495	*SvEND (req->sv2) = 0;
		496	SvPOK_only (req->sv2);
		497	SvSETMAGIC (req->sv2);
		498	PUSHs (sv_result);
		499	}
		500	break;
		501
		502	case EIO_DUP2:
		503	if (req->result > 0)
		504	SvIV_set (sv_result, 0);
		505	/* FALLTHROUGH */
		506
447	default:	507	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	508	PUSHs (sv_result);
449	break;	509	break;
450	}	510	}
451		511
452	errno = req->errorno;	512	errno = req->errorno;
453		513
454	PUTBACK;	514	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	515	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	516	SPAGAIN;
		517
		518	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		519	SvREFCNT_dec (sv_result);
		520	else
		521	sv_result_cache = sv_result;
457		522
458	FREETMPS;	523	FREETMPS;
459	LEAVE;	524	LEAVE;
		525
		526	PUTBACK;
460	}	527	}
461		528
462	if (req->grp)	529	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	}	530	}
482		531
483	static void req_free (aio_req req)	532	static void req_destroy (aio_req req)
484	{	533	{
485	if (req->self)	534	if (req->self)
486	{	535	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	536	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	537	SvREFCNT_dec (req->self);
489	}	538	}
490		539
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	540	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	541	SvREFCNT_dec (req->sv2);
494	SvREFCNT_dec (req->callback);	542	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499		543
500	Safefree (req);	544	Safefree (req);
501	}	545	}
502		546
503	static void req_cancel_subs (aio_req grp)	547	static void req_cancel_subs (aio_req grp)
504	{	548	{
505	aio_req sub;	549	aio_req sub;
506		550
507	if (grp->type != REQ_GROUP)	551	if (grp->type != EIO_GROUP)
508	return;	552	return;
509		553
510	SvREFCNT_dec (grp->fh2);	554	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	555	grp->sv2 = 0;
512		556
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	557	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	558	}
516		559
517	static void req_cancel (aio_req req)	560	static void
		561	create_respipe (void)
518	{	562	{
519	req->flags |= FLAG_CANCELLED;	563	if (s_epipe_renew (&respipe))
520		564	croak ("IO::AIO: unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	565	}
523		566
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 ()	567	static void poll_wait (void)
623	{	568	{
624	fd_set rfd;
625
626	while (nreqs)	569	while (eio_nreqs ())
627	{	570	{
628	int size;	571	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	572
		573	X_LOCK (reslock);
630	size = res_queue.size;	574	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	575	X_UNLOCK (reslock);
632		576
633	if (size)	577	if (size)
634	return;	578	return;
635		579
636	maybe_start_thread ();	580	etp_maybe_start_thread ();
637		581
638	FD_ZERO(&rfd);	582	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	583	}
643	}	584	}
644		585
645	static int poll_cb (int max)	586	static int poll_cb (void)
646	{	587	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	588	for (;;)
653	{	589	{
654	while (max <= 0 || count < max)	590	int res = eio_poll ();
655	{
656	maybe_start_thread ();
657		591
658	LOCK (reslock);	592	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;	593	croak (0);
		594
		595	if (!max_outstanding || max_outstanding > eio_nreqs ())
		596	return res;
711		597
712	poll_wait ();	598	poll_wait ();
713
714	max = 0;
715	}	599	}
716
717	return count;
718	}	600	}
719		601
720	static void create_pipe ()	602	static void atfork_child (void)
721	{	603	{
722	if (pipe (respipe))	604	create_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	}	605	}
731		606
732	/*****************************************************************************/	607	/*****************************************************************************/
733	/* work around various missing functions */
734		608
735	#if !HAVE_PREADWRITE	609	#if !_POSIX_MAPPED_FILES
736	# define pread aio_pread	610	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
737	# define pwrite aio_pwrite	611	# define munmap(addr,length) (errno = ENOSYS, -1)
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	612	#endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882		613
883	if (res < 0	614	#define MMAP_MAGIC PERL_MAGIC_ext
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		615
894	res = 0;	616	static int
		617	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		618	{
		619	int old_errno = errno;
		620	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		621	errno = old_errno;
895		622
896	while (count)	623	mg->mg_obj = 0; /* just in case */
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901		624
902	if (cnt <= 0)	625	SvREADONLY_off (sv);
903	{	626	SvCUR_set (sv, 0);
904	if (cnt && !res) res = -1;	627	SvLEN_set (sv, 0);
905	break;	628	SvPVX (sv) = 0;
906	}	629	SvOK_off (sv);
907		630
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;	631	return 0;
923	}	632	}
924		633
925	/* read a full directory */	634	static MGVTBL mmap_vtbl = {
926	static void scandir_ (aio_req req, worker *self)	635	0, 0, 0, 0, mmap_free
927	{	636	};
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		637
986	/*****************************************************************************/	638	/*****************************************************************************/
987		639
988	static void *aio_proc (void *thr_arg)	640	static SV *
		641	get_cb (SV *cb_sv)
989	{	642	{
990	aio_req req;	643	SvGETMAGIC (cb_sv);
991	struct timespec ts;	644	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
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	}
1139
1140	static void atfork_child (void)
1141	{
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 ();
1170
1171	atfork_parent ();
1172	}	645	}
1173		646
1174	#define dREQ \	647	#define dREQ \
		648	SV *cb_cv; \
1175	aio_req req; \	649	aio_req req; \
1176	int req_pri = next_pri; \	650	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \	651	next_pri = EIO_PRI_DEFAULT; \
1178	\	652	\
1179	if (SvOK (callback) && !SvROK (callback)) \	653	cb_cv = get_cb (callback); \
1180	croak ("callback must be undef or of reference type"); \
1181	\	654	\
1182	Newz (0, req, 1, aio_cb); \	655	Newz (0, req, 1, eio_req); \
1183	if (!req) \	656	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \	657	croak ("out of memory during eio_req allocation"); \
1185	\	658	\
1186	req->callback = newSVsv (callback); \	659	req->callback = SvREFCNT_inc (cb_cv); \
1187	req->pri = req_pri	660	req->pri = req_pri
1188		661
1189	#define REQ_SEND \	662	#define REQ_SEND \
		663	PUTBACK; \
1190	req_send (req); \	664	req_submit (req); \
		665	SPAGAIN; \
1191	\	666	\
1192	if (GIMME_V != G_VOID) \	667	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));	668	XPUSHs (req_sv (req, aio_req_stash));
1194		669
1195	MODULE = IO::AIO PACKAGE = IO::AIO	670	MODULE = IO::AIO PACKAGE = IO::AIO
1196		671
1197	PROTOTYPES: ENABLE	672	PROTOTYPES: ENABLE
1198		673
1199	BOOT:	674	BOOT:
1200	{	675	{
		676	static const struct {
		677	const char *name;
		678	IV iv;
		679	} *civ, const_iv[] = {
		680	# define const_niv(name, value) { # name, (IV) value },
		681	# define const_iv(name) { # name, (IV) name },
		682	# define const_eio(name) { # name, (IV) EIO_ ## name },
		683	const_iv (EXDEV)
		684	const_iv (ENOSYS)
		685	const_iv (O_RDONLY)
		686	const_iv (O_WRONLY)
		687	const_iv (O_RDWR)
		688	const_iv (O_CREAT)
		689	const_iv (O_TRUNC)
		690	const_iv (O_EXCL)
		691	const_iv (O_APPEND)
		692	#ifndef _WIN32
		693	const_iv (S_IFIFO)
		694	#endif
		695	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		696	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		697	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		698	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		699	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		700	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		701
		702	const_iv (ST_RDONLY)
		703	const_iv (ST_NOSUID)
		704	const_iv (ST_NODEV)
		705	const_iv (ST_NOEXEC)
		706	const_iv (ST_SYNCHRONOUS)
		707	const_iv (ST_MANDLOCK)
		708	const_iv (ST_WRITE)
		709	const_iv (ST_APPEND)
		710	const_iv (ST_IMMUTABLE)
		711	const_iv (ST_NOATIME)
		712	const_iv (ST_NODIRATIME)
		713	const_iv (ST_RELATIME)
		714
		715	const_iv (PROT_EXEC)
		716	const_iv (PROT_NONE)
		717	const_iv (PROT_READ)
		718	const_iv (PROT_WRITE)
		719
		720	/*const_iv (MAP_FIXED)*/
		721	const_iv (MAP_PRIVATE)
		722	const_iv (MAP_SHARED)
		723	const_iv (MAP_ANONYMOUS)
		724
		725	/* linuxish */
		726	const_iv (MAP_HUGETLB)
		727	const_iv (MAP_LOCKED)
		728	const_iv (MAP_NORESERVE)
		729	const_iv (MAP_POPULATE)
		730	const_iv (MAP_NONBLOCK)
		731
		732	const_iv (MCL_FUTURE)
		733	const_iv (MCL_CURRENT)
		734
		735	const_eio (MS_ASYNC)
		736	const_eio (MS_INVALIDATE)
		737	const_eio (MS_SYNC)
		738
		739	const_eio (MT_MODIFY)
		740
		741	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		742	const_eio (SYNC_FILE_RANGE_WRITE)
		743	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		744
		745	const_eio (READDIR_DENTS)
		746	const_eio (READDIR_DIRS_FIRST)
		747	const_eio (READDIR_STAT_ORDER)
		748	const_eio (READDIR_FOUND_UNKNOWN)
		749
		750	const_eio (DT_UNKNOWN)
		751	const_eio (DT_FIFO)
		752	const_eio (DT_CHR)
		753	const_eio (DT_DIR)
		754	const_eio (DT_BLK)
		755	const_eio (DT_REG)
		756	const_eio (DT_LNK)
		757	const_eio (DT_SOCK)
		758	const_eio (DT_WHT)
		759	};
		760
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	761	aio_stash = gv_stashpv ("IO::AIO" , 1);
		762	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		763	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1202		764
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	765	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	766	newCONSTSUB (aio_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		767
		768	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		769
1210	create_pipe ();	770	create_respipe ();
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	771
		772	if (eio_init (want_poll, done_poll) < 0)
		773	croak ("IO::AIO: unable to initialise eio library");
		774
		775	/* atfork child called in fifo order, so before eio's handler */
		776	X_THREAD_ATFORK (0, 0, atfork_child);
1212	}	777	}
		778
		779	void
		780	max_poll_reqs (int nreqs)
		781	PROTOTYPE: $
		782	CODE:
		783	eio_set_max_poll_reqs (nreqs);
		784
		785	void
		786	max_poll_time (double nseconds)
		787	PROTOTYPE: $
		788	CODE:
		789	eio_set_max_poll_time (nseconds);
1213		790
1214	void	791	void
1215	min_parallel (int nthreads)	792	min_parallel (int nthreads)
1216	PROTOTYPE: $	793	PROTOTYPE: $
		794	CODE:
		795	eio_set_min_parallel (nthreads);
1217		796
1218	void	797	void
1219	max_parallel (int nthreads)	798	max_parallel (int nthreads)
1220	PROTOTYPE: $	799	PROTOTYPE: $
		800	CODE:
		801	eio_set_max_parallel (nthreads);
1221		802
1222	int	803	void
		804	max_idle (int nthreads)
		805	PROTOTYPE: $
		806	CODE:
		807	eio_set_max_idle (nthreads);
		808
		809	void
1223	max_outstanding (int maxreqs)	810	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	811	PROTOTYPE: $
1225	CODE:	812	CODE:
1226	RETVAL = max_outstanding;
1227	max_outstanding = maxreqs;	813	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		814
1231	void	815	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	816	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: $$$;$	817	PROTOTYPE: $$$;$
1238	PPCODE:	818	PPCODE:
1239	{	819	{
1240	dREQ;	820	dREQ;
1241		821
1242	req->type = REQ_OPEN;	822	req->type = EIO_OPEN;
1243	req->data = newSVsv (pathname);	823	req->sv1 = newSVsv (pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);	824	req->ptr1 = SvPVbyte_nolen (req->sv1);
1245	req->fd = flags;	825	req->int1 = flags;
1246	req->mode = mode;	826	req->int2 = mode;
1247		827
1248	REQ_SEND;	828	REQ_SEND;
1249	}	829	}
1250		830
1251	void	831	void
1252	aio_close (fh,callback=&PL_sv_undef)	832	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$	833	PROTOTYPE: $;$
1256	ALIAS:	834	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	835	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	836	aio_fdatasync = EIO_FDATASYNC
1260	PPCODE:	837	PPCODE:
1261	{	838	{
		839	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	840	dREQ;
1263		841
1264	req->type = ix;	842	req->type = ix;
1265	req->fh = newSVsv (fh);	843	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	844	req->int1 = fd;
1267		845
1268	REQ_SEND (req);	846	REQ_SEND (req);
1269	}	847	}
1270		848
1271	void	849	void
		850	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		851	PROTOTYPE: $$$$;$
		852	PPCODE:
		853	{
		854	int fd = s_fileno_croak (fh, 0);
		855	dREQ;
		856
		857	req->type = EIO_SYNC_FILE_RANGE;
		858	req->sv1 = newSVsv (fh);
		859	req->int1 = fd;
		860	req->offs = offset;
		861	req->size = nbytes;
		862	req->int2 = flags;
		863
		864	REQ_SEND (req);
		865	}
		866
		867	void
		868	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		869	PROTOTYPE: $;$
		870	PPCODE:
		871	{
		872	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		873	int fd = s_fileno_croak (fh, 0);
		874	dREQ;
		875
		876	if (close_pipe < 0)
		877	{
		878	int pipefd [2];
		879
		880	if (pipe (pipefd) < 0
		881	|| close (pipefd [1]) < 0
		882	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		883	abort (); /*D*/
		884
		885	close_pipe = pipefd [0];
		886	}
		887
		888	req->type = EIO_DUP2;
		889	req->int1 = close_pipe;
		890	req->sv2 = newSVsv (fh);
		891	req->int2 = fd;
		892
		893	REQ_SEND (req);
		894	}
		895
		896	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	897	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1273	SV * fh
1274	UV offset
1275	UV length
1276	SV * data
1277	UV dataoffset
1278	SV * callback
1279	ALIAS:	898	ALIAS:
1280	aio_read = REQ_READ	899	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	900	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$	901	PROTOTYPE: $$$$$;$
1283	PPCODE:	902	PPCODE:
1284	{	903	{
1285	aio_req req;
1286	STRLEN svlen;	904	STRLEN svlen;
		905	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	906	char *svptr = SvPVbyte (data, svlen);
1288		907	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		908
1292	if (dataoffset < 0)	909	if (dataoffset < 0)
1293	dataoffset += svlen;	910	dataoffset += svlen;
1294		911
1295	if (dataoffset < 0 || dataoffset > svlen)	912	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	913	croak ("dataoffset outside of data scalar");
1297		914
1298	if (ix == REQ_WRITE)	915	if (ix == EIO_WRITE)
1299	{	916	{
1300	/* write: check length and adjust. */	917	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	918	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	919	len = svlen - dataoffset;
1303	}	920	}
1304	else	921	else
1305	{	922	{
1306	/* read: grow scalar as necessary */	923	/* read: check type and grow scalar as necessary */
		924	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	925	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	926	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		927
1313	{	928	{
1314	dREQ;	929	dREQ;
1315		930
1316	req->type = ix;	931	req->type = ix;
1317	req->fh = newSVsv (fh);	932	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	933	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	934	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	935	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	936	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	937	req->ptr2 = (char *)svptr + dataoffset;
		938	req->stroffset = dataoffset;
1324		939
1325	if (!SvREADONLY (data))	940	if (!SvREADONLY (data))
1326	{	941	{
1327	SvREADONLY_on (data);	942	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	943	req->flags |= FLAG_SV2_RO_OFF;
1329	}	944	}
1330		945
1331	REQ_SEND;	946	REQ_SEND;
1332	}	947	}
1333	}	948	}
1334		949
1335	void	950	void
		951	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		952	PROTOTYPE: $$;$
		953	PPCODE:
		954	{
		955	SV *data;
		956	dREQ;
		957
		958	req->type = EIO_READLINK;
		959	req->sv1 = newSVsv (path);
		960	req->ptr1 = SvPVbyte_nolen (req->sv1);
		961
		962	REQ_SEND;
		963	}
		964
		965	void
1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	966	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: $$$$;$	967	PROTOTYPE: $$$$;$
1343	PPCODE:	968	PPCODE:
1344	{	969	{
		970	int ifd = s_fileno_croak (in_fh , 0);
		971	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	972	dREQ;
1346		973
1347	req->type = REQ_SENDFILE;	974	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	975	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	976	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	977	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	978	req->int2 = ifd;
1352	req->offset = in_offset;	979	req->offs = in_offset;
1353	req->length = length;	980	req->size = length;
1354		981
1355	REQ_SEND;	982	REQ_SEND;
1356	}	983	}
1357		984
1358	void	985	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	986	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$	987	PROTOTYPE: $$$;$
1365	PPCODE:	988	PPCODE:
1366	{	989	{
		990	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	991	dREQ;
1368		992
1369	req->type = REQ_READAHEAD;	993	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	994	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	995	req->int1 = fd;
1372	req->offset = offset;	996	req->offs = offset;
1373	req->length = length;	997	req->size = length;
1374		998
1375	REQ_SEND;	999	REQ_SEND;
1376	}	1000	}
1377		1001
1378	void	1002	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	1003	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	1004	ALIAS:
1383	aio_stat = REQ_STAT	1005	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	1006	aio_lstat = EIO_LSTAT
		1007	aio_statvfs = EIO_STATVFS
1385	PPCODE:	1008	PPCODE:
1386	{	1009	{
1387	dREQ;	1010	dREQ;
1388		1011
1389	New (0, req->statdata, 1, Stat_t);	1012	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		1013
1396	if (SvPOK (fh_or_path))	1014	if (SvPOK (req->sv1))
1397	{	1015	{
1398	req->type = ix;	1016	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);	1017	req->ptr1 = SvPVbyte_nolen (req->sv1);
1401	}	1018	}
1402	else	1019	else
1403	{	1020	{
1404	req->type = REQ_FSTAT;	1021	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1405	req->fh = newSVsv (fh_or_path);
1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1022	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}	1023	}
1408		1024
1409	REQ_SEND;	1025	REQ_SEND;
1410	}	1026	}
1411		1027
1412	void	1028	void
		1029	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1030	PPCODE:
		1031	{
		1032	dREQ;
		1033
		1034	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1035	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1036	req->sv1 = newSVsv (fh_or_path);
		1037
		1038	if (SvPOK (req->sv1))
		1039	{
		1040	req->type = EIO_UTIME;
		1041	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1042	}
		1043	else
		1044	{
		1045	req->type = EIO_FUTIME;
		1046	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1047	}
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1054	PPCODE:
		1055	{
		1056	dREQ;
		1057
		1058	req->sv1 = newSVsv (fh_or_path);
		1059	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1060
		1061	if (SvPOK (req->sv1))
		1062	{
		1063	req->type = EIO_TRUNCATE;
		1064	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1065	}
		1066	else
		1067	{
		1068	req->type = EIO_FTRUNCATE;
		1069	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1070	}
		1071
		1072	REQ_SEND;
		1073	}
		1074
		1075	void
		1076	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1077	ALIAS:
		1078	aio_chmod = EIO_CHMOD
		1079	aio_mkdir = EIO_MKDIR
		1080	PPCODE:
		1081	{
		1082	dREQ;
		1083
		1084	req->int2 = mode;
		1085	req->sv1 = newSVsv (fh_or_path);
		1086
		1087	if (SvPOK (req->sv1))
		1088	{
		1089	req->type = ix;
		1090	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1091	}
		1092	else
		1093	{
		1094	req->type = EIO_FCHMOD;
		1095	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1096	}
		1097
		1098	REQ_SEND;
		1099	}
		1100
		1101	void
		1102	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1103	PPCODE:
		1104	{
		1105	dREQ;
		1106
		1107	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1108	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1109	req->sv1 = newSVsv (fh_or_path);
		1110
		1111	if (SvPOK (req->sv1))
		1112	{
		1113	req->type = EIO_CHOWN;
		1114	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1115	}
		1116	else
		1117	{
		1118	req->type = EIO_FCHOWN;
		1119	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1120	}
		1121
		1122	REQ_SEND;
		1123	}
		1124
		1125	void
		1126	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1127	PPCODE:
		1128	{
		1129	dREQ;
		1130
		1131	req->type = EIO_READDIR;
		1132	req->sv1 = newSVsv (pathname);
		1133	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1134	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1135
		1136	if (flags & EIO_READDIR_DENTS)
		1137	req->int1 |= EIO_READDIR_CUSTOM2;
		1138
		1139	REQ_SEND;
		1140	}
		1141
		1142	void
1413	aio_unlink (pathname,callback=&PL_sv_undef)	1143	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	1144	ALIAS:
1417	aio_unlink = REQ_UNLINK	1145	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	1146	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	1147	aio_readdir = EIO_READDIR
1420	PPCODE:	1148	PPCODE:
1421	{	1149	{
1422	dREQ;	1150	dREQ;
1423		1151
1424	req->type = ix;	1152	req->type = ix;
1425	req->data = newSVsv (pathname);	1153	req->sv1 = newSVsv (pathname);
1426	req->dataptr = SvPVbyte_nolen (req->data);	1154	req->ptr1 = SvPVbyte_nolen (req->sv1);
1427		1155
1428	REQ_SEND;	1156	REQ_SEND;
1429	}	1157	}
1430		1158
1431	void	1159	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1160	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:	1161	ALIAS:
1437	aio_link = REQ_LINK	1162	aio_link = EIO_LINK
1438	aio_symlink = REQ_SYMLINK	1163	aio_symlink = EIO_SYMLINK
1439	aio_rename = REQ_RENAME	1164	aio_rename = EIO_RENAME
1440	PPCODE:	1165	PPCODE:
1441	{	1166	{
1442	dREQ;	1167	dREQ;
1443		1168
1444	req->type = ix;	1169	req->type = ix;
1445	req->fh = newSVsv (oldpath);	1170	req->sv1 = newSVsv (oldpath);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	1171	req->ptr1 = SvPVbyte_nolen (req->sv1);
1447	req->data = newSVsv (newpath);	1172	req->sv2 = newSVsv (newpath);
1448	req->dataptr = SvPVbyte_nolen (req->data);	1173	req->ptr2 = SvPVbyte_nolen (req->sv2);
1449		1174
1450	REQ_SEND;	1175	REQ_SEND;
1451	}	1176	}
1452		1177
1453	void	1178	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1179	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1455	SV * pathname
1456	SV * callback
1457	UV mode
1458	UV dev
1459	PPCODE:	1180	PPCODE:
1460	{	1181	{
1461	dREQ;	1182	dREQ;
1462		1183
1463	req->type = REQ_MKNOD;	1184	req->type = EIO_MKNOD;
1464	req->data = newSVsv (pathname);	1185	req->sv1 = newSVsv (pathname);
1465	req->dataptr = SvPVbyte_nolen (req->data);	1186	req->ptr1 = SvPVbyte_nolen (req->sv1);
1466	req->mode = (mode_t)mode;	1187	req->int2 = (mode_t)mode;
1467	req->offset = dev;	1188	req->offs = dev;
1468		1189
1469	REQ_SEND;	1190	REQ_SEND;
1470	}	1191	}
1471		1192
1472	void	1193	void
		1194	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1195	ALIAS:
		1196	aio_mtouch = EIO_MTOUCH
		1197	aio_msync = EIO_MSYNC
		1198	PROTOTYPE: $$$$;$
		1199	PPCODE:
		1200	{
		1201	STRLEN svlen;
		1202	UV len = SvUV (length);
		1203	char *svptr = SvPVbyte (data, svlen);
		1204
		1205	if (offset < 0)
		1206	offset += svlen;
		1207
		1208	if (offset < 0 || offset > svlen)
		1209	croak ("offset outside of scalar");
		1210
		1211	if (!SvOK (length) || len + offset > svlen)
		1212	len = svlen - offset;
		1213
		1214	{
		1215	dREQ;
		1216
		1217	req->type = ix;
		1218	req->size = len;
		1219	req->sv2 = SvREFCNT_inc (data);
		1220	req->ptr2 = (char *)svptr + offset;
		1221	req->int1 = flags;
		1222
		1223	REQ_SEND;
		1224	}
		1225	}
		1226
		1227	void
1473	aio_busy (delay,callback=&PL_sv_undef)	1228	aio_busy (double delay, SV *callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:	1229	PPCODE:
1477	{	1230	{
1478	dREQ;	1231	dREQ;
1479		1232
1480	req->type = REQ_BUSY;	1233	req->type = EIO_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;	1234	req->nv1 = delay < 0. ? 0. : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483		1235
1484	REQ_SEND;	1236	REQ_SEND;
1485	}	1237	}
1486		1238
1487	void	1239	void
1488	aio_group (callback=&PL_sv_undef)	1240	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$	1241	PROTOTYPE: ;$
1491	PPCODE:	1242	PPCODE:
1492	{	1243	{
1493	dREQ;	1244	dREQ;
1494		1245
1495	req->type = REQ_GROUP;	1246	req->type = EIO_GROUP;
		1247
1496	req_send (req);	1248	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1249	XPUSHs (req_sv (req, aio_grp_stash));
1499	}	1250	}
1500		1251
1501	void	1252	void
1502	aio_nop (callback=&PL_sv_undef)	1253	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1254	ALIAS:
		1255	aio_nop = EIO_NOP
		1256	aio_sync = EIO_SYNC
1504	PPCODE:	1257	PPCODE:
1505	{	1258	{
1506	dREQ;	1259	dREQ;
1507		1260
1508	req->type = REQ_NOP;	1261	req->type = ix;
1509		1262
1510	REQ_SEND;	1263	REQ_SEND;
1511	}	1264	}
1512		1265
1513	int	1266	int
1514	aioreq_pri (int pri = 0)	1267	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$	1268	PROTOTYPE: ;$
1516	CODE:	1269	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1270	RETVAL = next_pri;
1518	if (items > 0)	1271	if (items > 0)
1519	{	1272	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1273	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1274	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1275	next_pri = pri;
1523	}	1276	}
1524	OUTPUT:	1277	OUTPUT:
1525	RETVAL	1278	RETVAL
1526		1279
1527	void	1280	void
1528	aioreq_nice (int nice = 0)	1281	aioreq_nice (int nice = 0)
1529	CODE:	1282	CODE:
1530	nice = next_pri - nice;	1283	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1284	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1285	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1286	next_pri = nice;
1534		1287
1535	void	1288	void
1536	flush ()	1289	flush ()
1537	PROTOTYPE:	1290	PROTOTYPE:
1538	CODE:	1291	CODE:
1539	while (nreqs)	1292	while (eio_nreqs ())
1540	{	1293	{
1541	poll_wait ();	1294	poll_wait ();
1542	poll_cb (0);	1295	poll_cb ();
1543	}	1296	}
1544		1297
1545	void	1298	int
1546	poll()	1299	poll()
1547	PROTOTYPE:	1300	PROTOTYPE:
1548	CODE:	1301	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();	1302	poll_wait ();
1552	poll_cb (0);	1303	RETVAL = poll_cb ();
1553	}	1304	OUTPUT:
		1305	RETVAL
1554		1306
1555	int	1307	int
1556	poll_fileno()	1308	poll_fileno()
1557	PROTOTYPE:	1309	PROTOTYPE:
1558	CODE:	1310	CODE:
1559	RETVAL = respipe [0];	1311	RETVAL = s_epipe_fd (&respipe);
1560	OUTPUT:	1312	OUTPUT:
1561	RETVAL	1313	RETVAL
1562		1314
1563	int	1315	int
1564	poll_cb(...)	1316	poll_cb(...)
1565	PROTOTYPE:	1317	PROTOTYPE:
1566	CODE:	1318	CODE:
1567	RETVAL = poll_cb (0);	1319	RETVAL = poll_cb ();
1568	OUTPUT:	1320	OUTPUT:
1569	RETVAL	1321	RETVAL
1570		1322
1571	int
1572	poll_some(int max = 0)
1573	PROTOTYPE: $
1574	CODE:
1575	RETVAL = poll_cb (max);
1576	OUTPUT:
1577	RETVAL
1578
1579	void	1323	void
1580	poll_wait()	1324	poll_wait()
1581	PROTOTYPE:	1325	PROTOTYPE:
1582	CODE:	1326	CODE:
1583	if (nreqs)
1584	poll_wait ();	1327	poll_wait ();
1585		1328
1586	int	1329	int
1587	nreqs()	1330	nreqs()
1588	PROTOTYPE:	1331	PROTOTYPE:
1589	CODE:	1332	CODE:
1590	RETVAL = nreqs;	1333	RETVAL = eio_nreqs ();
1591	OUTPUT:	1334	OUTPUT:
1592	RETVAL	1335	RETVAL
1593		1336
1594	int	1337	int
1595	nready()	1338	nready()
1596	PROTOTYPE:	1339	PROTOTYPE:
1597	CODE:	1340	CODE:
1598	RETVAL = get_nready ();	1341	RETVAL = eio_nready ();
1599	OUTPUT:	1342	OUTPUT:
1600	RETVAL	1343	RETVAL
1601		1344
1602	int	1345	int
1603	npending()	1346	npending()
1604	PROTOTYPE:	1347	PROTOTYPE:
1605	CODE:	1348	CODE:
1606	RETVAL = get_npending ();	1349	RETVAL = eio_npending ();
1607	OUTPUT:	1350	OUTPUT:
1608	RETVAL	1351	RETVAL
1609		1352
		1353	int
		1354	nthreads()
		1355	PROTOTYPE:
		1356	CODE:
		1357	RETVAL = eio_nthreads ();
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1363	PROTOTYPE: $$$$
		1364	CODE:
		1365	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1366	RETVAL = posix_fadvise (fh, offset, length, advice);
		1367	#else
		1368	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1369	#endif
		1370	OUTPUT:
		1371	RETVAL
		1372
		1373	ssize_t
		1374	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1375	PROTOTYPE: $$$$
		1376	CODE:
		1377	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1378	OUTPUT:
		1379	RETVAL
		1380
		1381	void
		1382	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1383	PROTOTYPE: $$$$$;$
		1384	PPCODE:
		1385	sv_unmagic (scalar, MMAP_MAGIC);
		1386	{
		1387	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1388	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1389	if (addr == (void *)-1)
		1390	XSRETURN_NO;
		1391
		1392	/* we store the length in mg_obj, as namlen is I32 :/ */
		1393	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1394	->mg_obj = (SV *)length;
		1395
		1396	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1397	if (!(prot & PROT_WRITE))
		1398	SvREADONLY_on (scalar);
		1399
		1400	SvPVX (scalar) = (char *)addr;
		1401	SvCUR_set (scalar, length);
		1402	SvLEN_set (scalar, 0);
		1403	SvPOK_only (scalar);
		1404
		1405	XSRETURN_YES;
		1406	}
		1407
		1408	void
		1409	munmap (SV *scalar)
		1410	PROTOTYPE: $
		1411	CODE:
		1412	sv_unmagic (scalar, MMAP_MAGIC);
		1413
		1414	int
		1415	mlockall (int flags)
		1416	PROTOTYPE: $
		1417	CODE:
		1418	#if _POSIX_MEMLOCK
		1419	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1420	extern int mallopt (int, int);
		1421	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1422	#endif
		1423	mlockall (flags);
		1424	#else
		1425	RETVAL = -1;
		1426	errno = ENOSYS;
		1427	#endif
		1428	OUTPUT:
		1429	RETVAL
		1430
		1431	int
		1432	munlockall ()
		1433	PROTOTYPE:
		1434	CODE:
		1435	#if _POSIX_MEMLOCK
		1436	munlockall ();
		1437	#else
		1438	RETVAL = -1;
		1439	errno = ENOSYS;
		1440	#endif
		1441	OUTPUT:
		1442	RETVAL
		1443
		1444	void _on_next_submit (SV *cb)
		1445	CODE:
		1446	SvREFCNT_dec (on_next_submit);
		1447	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1448
1610	PROTOTYPES: DISABLE	1449	PROTOTYPES: DISABLE
1611		1450
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1452
1614	void	1453	void
1615	cancel (aio_req_ornot req)	1454	cancel (aio_req_ornot req)
1616	CODE:	1455	CODE:
1617	req_cancel (req);	1456	eio_cancel (req);
1618		1457
1619	void	1458	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1460	PPCODE:
		1461	{
		1462	if (GIMME_V != G_VOID)
		1463	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1464
		1465	if (items > 1)
		1466	{
		1467	SV *cb_cv =get_cb (callback);
		1468
1622	SvREFCNT_dec (req->callback);	1469	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1470	req->callback = SvREFCNT_inc (cb_cv);
		1471	}
		1472	}
1624		1473
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1474	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1475
1627	void	1476	void
1628	add (aio_req grp, ...)	1477	add (aio_req grp, ...)
1629	PPCODE:	1478	PPCODE:
1630	{	1479	{
1631	int i;	1480	int i;
1632	aio_req req;
1633		1481
1634	if (grp->fd == 2)	1482	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1483	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1484
1637	for (i = 1; i < items; ++i )	1485	for (i = 1; i < items; ++i )
1638	{	1486	{
		1487	aio_req req;
		1488
1639	if (GIMME_V != G_VOID)	1489	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1490	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1491
1642	req = SvAIO_REQ (ST (i));	1492	req = SvAIO_REQ (ST (i));
1643		1493
1644	if (req)	1494	if (req)
1645	{	1495	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	}	1496	}
1658	}	1497	}
1659		1498
1660	void	1499	void
1661	cancel_subs (aio_req_ornot req)	1500	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1509	AV *av;
1671		1510
1672	grp->errorno = errno;	1511	grp->errorno = errno;
1673		1512
1674	av = newAV ();	1513	av = newAV ();
		1514	av_extend (av, items - 1);
1675		1515
1676	for (i = 1; i < items; ++i )	1516	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1517	av_push (av, newSVsv (ST (i)));
1678		1518
1679	SvREFCNT_dec (grp->data);	1519	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1520	grp->sv1 = (SV *)av;
1681	}	1521	}
1682		1522
1683	void	1523	void
1684	errno (aio_req grp, int errorno = errno)	1524	errno (aio_req grp, int errorno = errno)
1685	CODE:	1525	CODE:
1686	grp->errorno = errorno;	1526	grp->errorno = errorno;
1687		1527
1688	void	1528	void
1689	limit (aio_req grp, int limit)	1529	limit (aio_req grp, int limit)
1690	CODE:	1530	CODE:
1691	grp->fd2 = limit;	1531	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1532
1694	void	1533	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1534	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1535	CODE:
1697	{	1536	{
1698	SvREFCNT_dec (grp->fh2);	1537	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1538	grp->sv2 = newSVsv (callback);
		1539	grp->feed = aio_grp_feed;
1700		1540
1701	if (grp->fd2 <= 0)	1541	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1542	grp->int2 = 2;
1703		1543
1704	aio_grp_feed (grp);	1544	eio_grp_limit (grp, grp->int2);
1705	}	1545	}
1706		1546

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