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

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