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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 1.162 by root, Sun Jan 10 23:05:12 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	#if !_POSIX_MAPPED_FILES
		26	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		27	# define munmap(addr,length) (errno = ENOSYS, -1)
		28	#endif
		29
		30	/* perl namespace pollution */
		31	#undef VERSION
		32
		33	#ifdef _WIN32
		34
		35	# define EIO_STRUCT_DIRENT Direntry_t
		36	# undef malloc
		37	# undef free
		38
		39	// perl overrides all those nice win32 functions
		40	# undef open
		41	# undef read
		42	# undef write
		43	# undef send
		44	# undef recv
		45	# undef stat
		46	# undef fstat
		47	# define lstat stat
		48	# undef truncate
		49	# undef ftruncate
		50	# undef open
		51	# undef close
		52	# undef unlink
		53	# undef rmdir
		54	# undef rename
		55	# undef lseek
		56
		57	# define chown(a,b,c) (errno = ENOSYS, -1)
		58	# define fchown(a,b,c) (errno = ENOSYS, -1)
		59	# define fchmod(a,b) (errno = ENOSYS, -1)
		60	# define symlink(a,b) (errno = ENOSYS, -1)
		61	# define readlink(a,b,c) (errno = ENOSYS, -1)
		62	# define mknod(a,b,c) (errno = ENOSYS, -1)
		63	# define truncate(a,b) (errno = ENOSYS, -1)
		64	# define ftruncate(fd,o) chsize ((fd), (o))
		65	# define fsync(fd) _commit (fd)
		66	# define opendir(fd) (errno = ENOSYS, 0)
		67	# define readdir(fd) (errno = ENOSYS, -1)
		68	# define closedir(fd) (errno = ENOSYS, -1)
		69	# define mkdir(a,b) mkdir (a)
		70
		71	#else
		72
38	# include <sys/uio.h>	73	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	74	# include <sys/select.h>
		75	# include <unistd.h>
		76	# include <utime.h>
		77	# include <signal.h>
		78	# define EIO_STRUCT_DIRENT struct dirent
		79
		80	#endif
		81
		82	/* perl stupidly overrides readdir and maybe others */
		83	/* with thread-unsafe versions, imagine that :( */
		84	#undef readdir
		85	#undef opendir
		86	#undef closedir
		87
		88	#define EIO_STRUCT_STAT Stat_t
		89
		90	/* use NV for 32 bit perls as it allows larger offsets */
		91	#if IVSIZE >= 8
		92	# define VAL64 IV
		93	# define SvVAL64 SvIV
		94	# define newSVval64 newSViv
		95	#else
		96	# define VAL64 NV
		97	# define SvVAL64 SvNV
		98	# define newSVval64 newSVnv
		99	#endif
		100
		101	/*****************************************************************************/
		102
		103	#if __GNUC__ >= 3
		104	# define expect(expr,value) __builtin_expect ((expr),(value))
		105	#else
		106	# define expect(expr,value) (expr)
		107	#endif
		108
		109	#define expect_false(expr) expect ((expr) != 0, 0)
		110	#define expect_true(expr) expect ((expr) != 0, 1)
		111
		112	/*****************************************************************************/
		113
		114	typedef SV SV8; /* byte-sv, used for argument-checking */
		115	typedef int aio_rfd; /* read file desriptor */
		116	typedef int aio_wfd; /* write file descriptor */
		117
		118	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		119
		120	#define EIO_REQ_MEMBERS \
		121	SV *callback; \
		122	SV *sv1, *sv2; \
		123	STRLEN stroffset; \
		124	SV *self;
		125
		126	#define EIO_NO_WRAPPERS 1
		127
		128	#include "libeio/eio.h"
		129
		130	#ifndef POSIX_FADV_NORMAL
		131	# define POSIX_FADV_NORMAL 0
		132	# define NO_FADVISE 1
		133	#endif
		134	#ifndef POSIX_FADV_SEQUENTIAL
		135	# define POSIX_FADV_SEQUENTIAL 0
		136	#endif
		137	#ifndef POSIX_FADV_RANDOM
		138	# define POSIX_FADV_RANDOM 0
		139	#endif
		140	#ifndef POSIX_FADV_NOREUSE
		141	# define POSIX_FADV_NOREUSE 0
		142	#endif
		143	#ifndef POSIX_FADV_WILLNEED
		144	# define POSIX_FADV_WILLNEED 0
		145	#endif
		146	#ifndef POSIX_FADV_DONTNEED
		147	# define POSIX_FADV_DONTNEED 0
		148	#endif
		149
		150	#ifndef ST_NODEV
		151	# define ST_NODEV 0
		152	#endif
		153	#ifndef ST_NOEXEC
		154	# define ST_NOEXEC 0
		155	#endif
		156	#ifndef ST_SYNCHRONOUS
		157	# define ST_SYNCHRONOUS 0
		158	#endif
		159	#ifndef ST_MANDLOCK
		160	# define ST_MANDLOCK 0
		161	#endif
		162	#ifndef ST_WRITE
		163	# define ST_WRITE 0
		164	#endif
		165	#ifndef ST_APPEND
		166	# define ST_APPEND 0
		167	#endif
		168	#ifndef ST_IMMUTABLE
		169	# define ST_IMMUTABLE 0
		170	#endif
		171	#ifndef ST_NOATIME
		172	# define ST_NOATIME 0
		173	#endif
		174	#ifndef ST_NODIRATIME
		175	# define ST_NODIRATIME 0
		176	#endif
		177	#ifndef ST_RELATIME
		178	# define ST_RELATIME 0
		179	#endif
		180
		181	#ifndef MCL_CURRENT
		182	# define MCL_CURRENT 0
		183	#endif
		184	#ifndef MCL_FUTURE
		185	# define MCL_FUTURE 0
		186	#endif
		187
		188	#ifndef MAP_ANONYMOUS
		189	# ifdef MAP_ANON
		190	# define MAP_ANONYMOUS MAP_ANON
43	# else	191	# else
44	# error sendfile support requested but not available	192	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	193	# endif
46	#endif	194	#endif
47		195	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	196	# 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	197	#endif
		198	#ifndef MAP_LOCKED
		199	# define MAP_LOCKED 0
79	#endif	200	#endif
		201	#ifndef MAP_NORESERVE
		202	# define MAP_NORESERVE 0
		203	#endif
		204	#ifndef MAP_POPULATE
		205	# define MAP_POPULATE 0
		206	#endif
		207	#ifndef MAP_NONBLOCK
		208	# define MAP_NONBLOCK 0
		209	#endif
80		210
81	/* buffer size for various temporary buffers */	211	#ifndef PAGESIZE
82	#define AIO_BUFSIZE 65536	212	# define PAGESIZE sysconf (_SC_PAGESIZE)
		213	#endif
83		214
84	#define dBUF \	215	static int req_invoke (eio_req *req);
85	char *aio_buf; \	216	#define EIO_FINISH(req) req_invoke (req)
86	LOCK (wrklock); \	217	static void req_destroy (eio_req *grp);
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	218	#define EIO_DESTROY(req) req_destroy (req)
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		219
92	enum {	220	enum {
93	REQ_QUIT,	221	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	};	222	};
105		223
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	224	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		225
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;	226	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	227	typedef eio_req *aio_req_ornot;
140		228
141	enum {	229	static SV *on_next_submit;
142	PRI_MIN = -4,	230	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	231	static int max_outstanding;
144		232
145	DEFAULT_PRI = 0,	233	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		234
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);	235	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	236	static void req_cancel (aio_req req);
301		237
		238	static void want_poll (void)
		239	{
		240	/* write a dummy byte to the pipe so fh becomes ready */
		241	s_epipe_signal (&respipe);
		242	}
		243
		244	static void done_poll (void)
		245	{
		246	/* read any signals sent by the worker threads */
		247	s_epipe_drain (&respipe);
		248	}
		249
302	/* must be called at most once */	250	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	251	static SV *req_sv (aio_req req, HV *stash)
304	{	252	{
305	if (!req->self)	253	if (!req->self)
306	{	254	{
307	req->self = (SV *)newHV ();	255	req->self = (SV *)newHV ();
308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	256	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309	}	257	}
310		258
311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	259	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
312	}	260	}
313		261
314	static aio_req SvAIO_REQ (SV *sv)	262	static aio_req SvAIO_REQ (SV *sv)
315	{	263	{
316	MAGIC *mg;	264	MAGIC *mg;
317		265
318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	266	if (!SvROK (sv)
		267	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		268	&& SvSTASH (SvRV (sv)) != aio_req_stash
		269	&& !sv_derived_from (sv, "IO::AIO::REQ")))
319	croak ("object of class " AIO_REQ_KLASS " expected");	270	croak ("object of class IO::AIO::REQ expected");
320		271
321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322		273
323	return mg ? (aio_req)mg->mg_ptr : 0;	274	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	275	}
325		276
326	static void aio_grp_feed (aio_req grp)	277	static void aio_grp_feed (aio_req grp)
327	{	278	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	279	if (grp->sv2 && SvOK (grp->sv2))
329	{	280	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	281	dSP;
335		282
336	ENTER;	283	ENTER;
337	SAVETMPS;	284	SAVETMPS;
338	PUSHMARK (SP);	285	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	286	XPUSHs (req_sv (grp, aio_grp_stash));
340	PUTBACK;	287	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	288	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	289	SPAGAIN;
343	FREETMPS;	290	FREETMPS;
344	LEAVE;	291	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	}	292	}
355	}	293	}
356		294
357	static void aio_grp_dec (aio_req grp)	295	static void req_submit (eio_req *req)
358	{	296	{
359	--grp->length;	297	eio_submit (req);
360		298
361	/* call feeder, if applicable */	299	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	300	{
367	req_invoke (grp);	301	dSP;
368	req_free (grp);	302	SV *cb = sv_2mortal (on_next_submit);
		303
		304	on_next_submit = 0;
		305
		306	PUSHMARK (SP);
		307	PUTBACK;
		308	call_sv (cb, G_DISCARD | G_EVAL);
369	}	309	}
370	}	310	}
371		311
372	static void req_invoke (aio_req req)	312	static int req_invoke (eio_req *req)
373	{	313	{
374	dSP;	314	dSP;
375		315
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	316	if (req->flags & FLAG_SV2_RO_OFF)
		317	SvREADONLY_off (req->sv2);
		318
		319	if (!EIO_CANCELLED (req) && req->callback)
377	{	320	{
378	ENTER;	321	ENTER;
379	SAVETMPS;	322	SAVETMPS;
380	PUSHMARK (SP);	323	PUSHMARK (SP);
381	EXTEND (SP, 1);	324	EXTEND (SP, 1);
382		325
383	switch (req->type)	326	switch (req->type)
384	{	327	{
385	case REQ_READDIR:	328	case EIO_READDIR:
386	{	329	{
387	SV *rv = &PL_sv_undef;	330	SV *rv = &PL_sv_undef;
388		331
389	if (req->result >= 0)	332	if (req->result >= 0)
390	{	333	{
391	int i;	334	int i;
392	char *buf = req->data2ptr;	335	char *names = (char *)req->ptr2;
		336	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	337	AV *av = newAV ();
394		338
395	av_extend (av, req->result - 1);	339	av_extend (av, req->result - 1);
396		340
397	for (i = 0; i < req->result; ++i)	341	for (i = 0; i < req->result; ++i)
398	{	342	{
399	SV *sv = newSVpv (buf, 0);	343	if (req->int1 & EIO_READDIR_DENTS)
		344	{
		345	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		346
		347	if (req->int1 & EIO_READDIR_CUSTOM2)
		348	{
		349	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		350	AV *avent = newAV ();
		351
		352	av_extend (avent, 2);
		353
		354	if (!sv_type [ent->type])
		355	{
		356	sv_type [ent->type] = newSViv (ent->type);
		357	SvREADONLY_on (sv_type [ent->type]);
		358	}
		359
		360	av_store (avent, 0, namesv);
		361	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		362	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		363
		364	av_store (av, i, newRV_noinc ((SV *)avent));
		365	}
		366	else
401	av_store (av, i, sv);	367	av_store (av, i, namesv);
		368
		369	++ent;
		370	}
		371	else
		372	{
		373	SV *name = newSVpv (names, 0);
		374	av_store (av, i, name);
402	buf += SvCUR (sv) + 1;	375	names += SvCUR (name) + 1;
		376	}
403	}	377	}
404		378
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	379	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	380	}
407		381
408	PUSHs (rv);	382	PUSHs (rv);
		383
		384	if (req->int1 & EIO_READDIR_CUSTOM1)
		385	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
409	}	386	}
410	break;	387	break;
411		388
412	case REQ_OPEN:	389	case EIO_OPEN:
413	{	390	{
414	/* convert fd to fh */	391	/* convert fd to fh */
415	SV *fh;	392	SV *fh = &PL_sv_undef;
416		393
417	PUSHs (sv_2mortal (newSViv (req->result)));	394	if (req->result >= 0)
418	PUTBACK;	395	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	396	GV *gv = (GV *)sv_newmortal ();
420	SPAGAIN;	397	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		398	char sym [64];
		399	int symlen;
		400
		401	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		402	gv_init (gv, aio_stash, sym, symlen, 0);
421		403
422	fh = SvREFCNT_inc (POPs);	404	symlen = snprintf (
		405	sym,
		406	sizeof (sym),
		407	"%s&=%d",
		408	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		409	(int)req->result
		410	);
423		411
		412	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		413	fh = (SV *)gv;
		414	}
		415
424	PUSHMARK (SP);	416	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	417	}
427	break;	418	break;
428		419
		420	case EIO_STATVFS:
		421	case EIO_FSTATVFS:
		422	{
		423	SV *rv = &PL_sv_undef;
		424
		425	if (req->result >= 0)
		426	{
		427	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		428	HV *hv = newHV ();
		429
		430	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		431
		432	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		433	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		434	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		435	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		436	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		437	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		438	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		439	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		440	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		441	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		442	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		443	}
		444
		445	PUSHs (rv);
		446	}
		447
		448	break;
		449
429	case REQ_GROUP:	450	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	451	req->int1 = 2; /* mark group as finished */
431		452
432	if (req->data)	453	if (req->sv1)
433	{	454	{
434	int i;	455	int i;
435	AV *av = (AV *)req->data;	456	AV *av = (AV *)req->sv1;
436		457
437	EXTEND (SP, AvFILL (av) + 1);	458	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	459	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	460	PUSHs (*av_fetch (av, i, 0));
440	}	461	}
441	break;	462	break;
442		463
443	case REQ_NOP:	464	case EIO_NOP:
444	case REQ_BUSY:	465	case EIO_BUSY:
445	break;	466	break;
		467
		468	case EIO_READLINK:
		469	if (req->result > 0)
		470	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		471	break;
		472
		473	case EIO_STAT:
		474	case EIO_LSTAT:
		475	case EIO_FSTAT:
		476	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		477	PL_laststatval = req->result;
		478	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		479	PUSHs (sv_2mortal (newSViv (req->result)));
		480	break;
		481
		482	case EIO_READ:
		483	{
		484	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		485	*SvEND (req->sv2) = 0;
		486	SvPOK_only (req->sv2);
		487	SvSETMAGIC (req->sv2);
		488	PUSHs (sv_2mortal (newSViv (req->result)));
		489	}
		490	break;
		491
		492	case EIO_DUP2:
		493	if (req->result > 0)
		494	req->result = 0;
		495	/* FALLTHROUGH */
446		496
447	default:	497	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	498	PUSHs (sv_2mortal (newSViv (req->result)));
449	break;	499	break;
450	}	500	}
451		501
452	errno = req->errorno;	502	errno = req->errorno;
453		503
454	PUTBACK;	504	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	505	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	506	SPAGAIN;
457		507
458	FREETMPS;	508	FREETMPS;
459	LEAVE;	509	LEAVE;
		510
		511	PUTBACK;
460	}	512	}
461		513
462	if (req->grp)	514	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	}	515	}
482		516
483	static void req_free (aio_req req)	517	static void req_destroy (aio_req req)
484	{	518	{
485	if (req->self)	519	if (req->self)
486	{	520	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	521	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	522	SvREFCNT_dec (req->self);
489	}	523	}
490		524
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	525	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	526	SvREFCNT_dec (req->sv2);
494	SvREFCNT_dec (req->callback);	527	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499		528
500	Safefree (req);	529	Safefree (req);
501	}	530	}
502		531
503	static void req_cancel_subs (aio_req grp)	532	static void req_cancel_subs (aio_req grp)
504	{	533	{
505	aio_req sub;	534	aio_req sub;
506		535
507	if (grp->type != REQ_GROUP)	536	if (grp->type != EIO_GROUP)
508	return;	537	return;
509		538
510	SvREFCNT_dec (grp->fh2);	539	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	540	grp->sv2 = 0;
512		541
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	542	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	543	}
516		544
517	static void req_cancel (aio_req req)	545	static void
		546	create_respipe (void)
518	{	547	{
519	req->flags |= FLAG_CANCELLED;	548	if (s_epipe_renew (&respipe))
520		549	croak ("IO::AIO: unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	550	}
523		551
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 ()	552	static void poll_wait (void)
623	{	553	{
624	fd_set rfd;
625
626	while (nreqs)	554	while (eio_nreqs ())
627	{	555	{
628	int size;	556	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	557
		558	X_LOCK (reslock);
630	size = res_queue.size;	559	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	560	X_UNLOCK (reslock);
632		561
633	if (size)	562	if (size)
634	return;	563	return;
635		564
636	maybe_start_thread ();	565	etp_maybe_start_thread ();
637		566
638	FD_ZERO(&rfd);	567	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	568	}
643	}	569	}
644		570
645	static int poll_cb (int max)	571	static int poll_cb (void)
646	{	572	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	573	for (;;)
653	{	574	{
654	while (max <= 0 || count < max)	575	int res = eio_poll ();
655	{
656	maybe_start_thread ();
657		576
658	LOCK (reslock);	577	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;	578	croak (0);
		579
		580	if (!max_outstanding || max_outstanding > eio_nreqs ())
		581	return res;
711		582
712	poll_wait ();	583	poll_wait ();
713
714	max = 0;
715	}	584	}
716
717	return count;
718	}	585	}
719		586
720	static void create_pipe ()	587	static void atfork_child (void)
721	{	588	{
722	if (pipe (respipe))	589	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	}	590	}
731		591
732	/*****************************************************************************/	592	/*****************************************************************************/
733	/* work around various missing functions */
734		593
735	#if !HAVE_PREADWRITE	594	#define MMAP_MAGIC PERL_MAGIC_ext
736	# define pread aio_pread
737	# define pwrite aio_pwrite
738		595
739	/*	596	static int
740	* make our pread/pwrite safe against themselves, but not against	597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
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	{	598	{
748	ssize_t res;	599	int old_errno = errno;
749	off_t ooffset;	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
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;	601	errno = old_errno;
816		602
817	if (e)	603	mg->mg_obj = 0; /* just in case */
818	{
819	*res = ent;
820	strcpy (ent->d_name, e->d_name);
821	}
822	else
823	*res = 0;
824		604
825	UNLOCK (readdirlock);	605	SvREADONLY_off (sv);
		606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
826		610
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;	611	return 0;
839
840	#if HAVE_SENDFILE
841	# if __linux
842	res = sendfile (ofd, ifd, &offset, count);
843
844	# elif __freebsd
845	/*
846	* Of course, the freebsd sendfile is a dire hack with no thoughts
847	* wasted on making it similar to other I/O functions.
848	*/
849	{
850	off_t sbytes;
851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853	if (res < 0 && sbytes)
854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855	res = sbytes;
856	}
857
858	# elif __hpux
859	res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861	# elif __solaris
862	{
863	struct sendfilevec vec;
864	size_t sbytes;
865
866	vec.sfv_fd = ifd;
867	vec.sfv_flag = 0;
868	vec.sfv_off = offset;
869	vec.sfv_len = count;
870
871	res = sendfilev (ofd, &vec, 1, &sbytes);
872
873	if (res < 0 && sbytes)
874	res = sbytes;
875	}
876
877	# endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882
883	if (res < 0
884	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885	#if __solaris
886	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
887	#endif
888	)
889	)
890	{
891	/* emulate sendfile. this is a major pain in the ass */
892	dBUF;
893
894	res = 0;
895
896	while (count)
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901
902	if (cnt <= 0)
903	{
904	if (cnt && !res) res = -1;
905	break;
906	}
907
908	cnt = write (ofd, aio_buf, cnt);
909
910	if (cnt <= 0)
911	{
912	if (cnt && !res) res = -1;
913	break;
914	}
915
916	offset += cnt;
917	res += cnt;
918	count -= cnt;
919	}
920	}
921
922	return res;
923	}	612	}
924		613
925	/* read a full directory */	614	static MGVTBL mmap_vtbl = {
926	static void scandir_ (aio_req req, worker *self)	615	0, 0, 0, 0, mmap_free
927	{	616	};
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		617
986	/*****************************************************************************/	618	/*****************************************************************************/
987		619
988	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
989	{	622	{
990	aio_req req;	623	SvGETMAGIC (cb_sv);
991	struct timespec ts;	624	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	}	625	}
1173		626
1174	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
1175	aio_req req; \	629	aio_req req; \
1176	int req_pri = next_pri; \	630	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \	631	next_pri = EIO_PRI_DEFAULT; \
1178	\	632	\
1179	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
1180	croak ("callback must be undef or of reference type"); \
1181	\	634	\
1182	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
1183	if (!req) \	636	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
1185	\	638	\
1186	req->callback = newSVsv (callback); \	639	req->callback = SvREFCNT_inc (cb_cv); \
1187	req->pri = req_pri	640	req->pri = req_pri
1188		641
1189	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
1190	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
1191	\	646	\
1192	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
1194		649
1195	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
1196		651
1197	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
1198		653
1199	BOOT:	654	BOOT:
1200	{	655	{
		656	static const struct {
		657	const char *name;
		658	IV iv;
		659	} *civ, const_iv[] = {
		660	# define const_niv(name, value) { # name, (IV) value },
		661	# define const_iv(name) { # name, (IV) name },
		662	# define const_eio(name) { # name, (IV) EIO_ ## name },
		663	const_iv (EXDEV)
		664	const_iv (ENOSYS)
		665	const_iv (O_RDONLY)
		666	const_iv (O_WRONLY)
		667	const_iv (O_CREAT)
		668	const_iv (O_TRUNC)
		669	#ifndef _WIN32
		670	const_iv (S_IFIFO)
		671	#endif
		672	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		673	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		674	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		675	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		676	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		677	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		678
		679	const_iv (ST_RDONLY)
		680	const_iv (ST_NOSUID)
		681	const_iv (ST_NODEV)
		682	const_iv (ST_NOEXEC)
		683	const_iv (ST_SYNCHRONOUS)
		684	const_iv (ST_MANDLOCK)
		685	const_iv (ST_WRITE)
		686	const_iv (ST_APPEND)
		687	const_iv (ST_IMMUTABLE)
		688	const_iv (ST_NOATIME)
		689	const_iv (ST_NODIRATIME)
		690	const_iv (ST_RELATIME)
		691
		692	const_iv (PROT_EXEC)
		693	const_iv (PROT_NONE)
		694	const_iv (PROT_READ)
		695	const_iv (PROT_WRITE)
		696
		697	/*const_iv (MAP_FIXED)*/
		698	const_iv (MAP_PRIVATE)
		699	const_iv (MAP_SHARED)
		700	const_iv (MAP_ANONYMOUS)
		701
		702	/* linuxish */
		703	const_iv (MAP_HUGETLB)
		704	const_iv (MAP_LOCKED)
		705	const_iv (MAP_NORESERVE)
		706	const_iv (MAP_POPULATE)
		707	const_iv (MAP_NONBLOCK)
		708
		709	const_iv (MCL_FUTURE)
		710	const_iv (MCL_CURRENT)
		711
		712	const_eio (MS_ASYNC)
		713	const_eio (MS_INVALIDATE)
		714	const_eio (MS_SYNC)
		715
		716	const_eio (MT_MODIFY)
		717
		718	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		719	const_eio (SYNC_FILE_RANGE_WRITE)
		720	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		721
		722	const_eio (READDIR_DENTS)
		723	const_eio (READDIR_DIRS_FIRST)
		724	const_eio (READDIR_STAT_ORDER)
		725	const_eio (READDIR_FOUND_UNKNOWN)
		726
		727	const_eio (DT_UNKNOWN)
		728	const_eio (DT_FIFO)
		729	const_eio (DT_CHR)
		730	const_eio (DT_DIR)
		731	const_eio (DT_BLK)
		732	const_eio (DT_REG)
		733	const_eio (DT_LNK)
		734	const_eio (DT_SOCK)
		735	const_eio (DT_WHT)
		736	};
		737
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	738	aio_stash = gv_stashpv ("IO::AIO" , 1);
		739	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		740	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1202		741
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	742	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	743	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		744
		745	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		746
1210	create_pipe ();	747	create_respipe ();
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	748
		749	if (eio_init (want_poll, done_poll) < 0)
		750	croak ("IO::AIO: unable to initialise eio library");
		751
		752	/* atfork child called in fifo order, so before eio's handler */
		753	X_THREAD_ATFORK (0, 0, atfork_child);
1212	}	754	}
		755
		756	void
		757	max_poll_reqs (int nreqs)
		758	PROTOTYPE: $
		759	CODE:
		760	eio_set_max_poll_reqs (nreqs);
		761
		762	void
		763	max_poll_time (double nseconds)
		764	PROTOTYPE: $
		765	CODE:
		766	eio_set_max_poll_time (nseconds);
1213		767
1214	void	768	void
1215	min_parallel (int nthreads)	769	min_parallel (int nthreads)
1216	PROTOTYPE: $	770	PROTOTYPE: $
		771	CODE:
		772	eio_set_min_parallel (nthreads);
1217		773
1218	void	774	void
1219	max_parallel (int nthreads)	775	max_parallel (int nthreads)
1220	PROTOTYPE: $	776	PROTOTYPE: $
		777	CODE:
		778	eio_set_max_parallel (nthreads);
1221		779
1222	int	780	void
		781	max_idle (int nthreads)
		782	PROTOTYPE: $
		783	CODE:
		784	eio_set_max_idle (nthreads);
		785
		786	void
1223	max_outstanding (int maxreqs)	787	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	788	PROTOTYPE: $
1225	CODE:	789	CODE:
1226	RETVAL = max_outstanding;
1227	max_outstanding = maxreqs;	790	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		791
1231	void	792	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	793	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: $$$;$	794	PROTOTYPE: $$$;$
1238	PPCODE:	795	PPCODE:
1239	{	796	{
1240	dREQ;	797	dREQ;
1241		798
1242	req->type = REQ_OPEN;	799	req->type = EIO_OPEN;
1243	req->data = newSVsv (pathname);	800	req->sv1 = newSVsv (pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);	801	req->ptr1 = SvPVbyte_nolen (req->sv1);
1245	req->fd = flags;	802	req->int1 = flags;
1246	req->mode = mode;	803	req->int2 = mode;
1247		804
1248	REQ_SEND;	805	REQ_SEND;
1249	}	806	}
1250		807
1251	void	808	void
1252	aio_close (fh,callback=&PL_sv_undef)	809	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$	810	PROTOTYPE: $;$
1256	ALIAS:	811	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	812	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	813	aio_fdatasync = EIO_FDATASYNC
1260	PPCODE:	814	PPCODE:
1261	{	815	{
		816	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	817	dREQ;
1263		818
1264	req->type = ix;	819	req->type = ix;
1265	req->fh = newSVsv (fh);	820	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	821	req->int1 = fd;
1267		822
1268	REQ_SEND (req);	823	REQ_SEND (req);
1269	}	824	}
1270		825
1271	void	826	void
		827	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		828	PROTOTYPE: $$$$;$
		829	PPCODE:
		830	{
		831	int fd = s_fileno_croak (fh, 0);
		832	dREQ;
		833
		834	req->type = EIO_SYNC_FILE_RANGE;
		835	req->sv1 = newSVsv (fh);
		836	req->int1 = fd;
		837	req->offs = offset;
		838	req->size = nbytes;
		839	req->int2 = flags;
		840
		841	REQ_SEND (req);
		842	}
		843
		844	void
		845	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		846	PROTOTYPE: $;$
		847	PPCODE:
		848	{
		849	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		850	int fd = s_fileno_croak (fh, 0);
		851	dREQ;
		852
		853	if (close_pipe < 0)
		854	{
		855	int pipefd [2];
		856
		857	if (pipe (pipefd) < 0
		858	|| close (pipefd [1]) < 0
		859	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		860	abort (); /*D*/
		861
		862	close_pipe = pipefd [0];
		863	}
		864
		865	req->type = EIO_DUP2;
		866	req->int1 = close_pipe;
		867	req->sv2 = newSVsv (fh);
		868	req->int2 = fd;
		869
		870	REQ_SEND (req);
		871	}
		872
		873	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	874	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1273	SV * fh
1274	UV offset
1275	UV length
1276	SV * data
1277	UV dataoffset
1278	SV * callback
1279	ALIAS:	875	ALIAS:
1280	aio_read = REQ_READ	876	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	877	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$	878	PROTOTYPE: $$$$$;$
1283	PPCODE:	879	PPCODE:
1284	{	880	{
1285	aio_req req;
1286	STRLEN svlen;	881	STRLEN svlen;
		882	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	883	char *svptr = SvPVbyte (data, svlen);
1288		884	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		885
1292	if (dataoffset < 0)	886	if (dataoffset < 0)
1293	dataoffset += svlen;	887	dataoffset += svlen;
1294		888
1295	if (dataoffset < 0 || dataoffset > svlen)	889	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	890	croak ("dataoffset outside of data scalar");
1297		891
1298	if (ix == REQ_WRITE)	892	if (ix == EIO_WRITE)
1299	{	893	{
1300	/* write: check length and adjust. */	894	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	895	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	896	len = svlen - dataoffset;
1303	}	897	}
1304	else	898	else
1305	{	899	{
1306	/* read: grow scalar as necessary */	900	/* read: check type and grow scalar as necessary */
		901	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	902	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	903	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		904
1313	{	905	{
1314	dREQ;	906	dREQ;
1315		907
1316	req->type = ix;	908	req->type = ix;
1317	req->fh = newSVsv (fh);	909	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	910	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	911	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	912	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	913	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	914	req->ptr2 = (char *)svptr + dataoffset;
		915	req->stroffset = dataoffset;
1324		916
1325	if (!SvREADONLY (data))	917	if (!SvREADONLY (data))
1326	{	918	{
1327	SvREADONLY_on (data);	919	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	920	req->flags |= FLAG_SV2_RO_OFF;
1329	}	921	}
1330		922
1331	REQ_SEND;	923	REQ_SEND;
1332	}	924	}
1333	}	925	}
1334		926
1335	void	927	void
		928	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		929	PROTOTYPE: $$;$
		930	PPCODE:
		931	{
		932	SV *data;
		933	dREQ;
		934
		935	req->type = EIO_READLINK;
		936	req->sv1 = newSVsv (path);
		937	req->ptr1 = SvPVbyte_nolen (req->sv1);
		938
		939	REQ_SEND;
		940	}
		941
		942	void
1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	943	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: $$$$;$	944	PROTOTYPE: $$$$;$
1343	PPCODE:	945	PPCODE:
1344	{	946	{
		947	int ifd = s_fileno_croak (in_fh , 0);
		948	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	949	dREQ;
1346		950
1347	req->type = REQ_SENDFILE;	951	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	952	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	953	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	954	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	955	req->int2 = ifd;
1352	req->offset = in_offset;	956	req->offs = in_offset;
1353	req->length = length;	957	req->size = length;
1354		958
1355	REQ_SEND;	959	REQ_SEND;
1356	}	960	}
1357		961
1358	void	962	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	963	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$	964	PROTOTYPE: $$$;$
1365	PPCODE:	965	PPCODE:
1366	{	966	{
		967	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	968	dREQ;
1368		969
1369	req->type = REQ_READAHEAD;	970	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	972	req->int1 = fd;
1372	req->offset = offset;	973	req->offs = offset;
1373	req->length = length;	974	req->size = length;
1374		975
1375	REQ_SEND;	976	REQ_SEND;
1376	}	977	}
1377		978
1378	void	979	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	980	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	981	ALIAS:
1383	aio_stat = REQ_STAT	982	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	983	aio_lstat = EIO_LSTAT
		984	aio_statvfs = EIO_STATVFS
1385	PPCODE:	985	PPCODE:
1386	{	986	{
1387	dREQ;	987	dREQ;
1388		988
1389	New (0, req->statdata, 1, Stat_t);	989	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		990
1396	if (SvPOK (fh_or_path))	991	if (SvPOK (req->sv1))
1397	{	992	{
1398	req->type = ix;	993	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);	994	req->ptr1 = SvPVbyte_nolen (req->sv1);
1401	}	995	}
1402	else	996	else
1403	{	997	{
1404	req->type = REQ_FSTAT;	998	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)));	999	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}	1000	}
1408		1001
1409	REQ_SEND;	1002	REQ_SEND;
1410	}	1003	}
1411		1004
1412	void	1005	void
		1006	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1007	PPCODE:
		1008	{
		1009	dREQ;
		1010
		1011	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1012	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1013	req->sv1 = newSVsv (fh_or_path);
		1014
		1015	if (SvPOK (req->sv1))
		1016	{
		1017	req->type = EIO_UTIME;
		1018	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1019	}
		1020	else
		1021	{
		1022	req->type = EIO_FUTIME;
		1023	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1024	}
		1025
		1026	REQ_SEND;
		1027	}
		1028
		1029	void
		1030	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1031	PPCODE:
		1032	{
		1033	dREQ;
		1034
		1035	req->sv1 = newSVsv (fh_or_path);
		1036	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1037
		1038	if (SvPOK (req->sv1))
		1039	{
		1040	req->type = EIO_TRUNCATE;
		1041	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1042	}
		1043	else
		1044	{
		1045	req->type = EIO_FTRUNCATE;
		1046	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1047	}
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1054	ALIAS:
		1055	aio_chmod = EIO_CHMOD
		1056	aio_mkdir = EIO_MKDIR
		1057	PPCODE:
		1058	{
		1059	dREQ;
		1060
		1061	req->int2 = mode;
		1062	req->sv1 = newSVsv (fh_or_path);
		1063
		1064	if (SvPOK (req->sv1))
		1065	{
		1066	req->type = ix;
		1067	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1068	}
		1069	else
		1070	{
		1071	req->type = EIO_FCHMOD;
		1072	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1073	}
		1074
		1075	REQ_SEND;
		1076	}
		1077
		1078	void
		1079	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1080	PPCODE:
		1081	{
		1082	dREQ;
		1083
		1084	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1085	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1086	req->sv1 = newSVsv (fh_or_path);
		1087
		1088	if (SvPOK (req->sv1))
		1089	{
		1090	req->type = EIO_CHOWN;
		1091	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1092	}
		1093	else
		1094	{
		1095	req->type = EIO_FCHOWN;
		1096	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1097	}
		1098
		1099	REQ_SEND;
		1100	}
		1101
		1102	void
		1103	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	dREQ;
		1107
		1108	req->type = EIO_READDIR;
		1109	req->sv1 = newSVsv (pathname);
		1110	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1111	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1112
		1113	if (flags & EIO_READDIR_DENTS)
		1114	req->int1 |= EIO_READDIR_CUSTOM2;
		1115
		1116	REQ_SEND;
		1117	}
		1118
		1119	void
1413	aio_unlink (pathname,callback=&PL_sv_undef)	1120	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	1121	ALIAS:
1417	aio_unlink = REQ_UNLINK	1122	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	1123	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	1124	aio_readdir = EIO_READDIR
1420	PPCODE:	1125	PPCODE:
1421	{	1126	{
1422	dREQ;	1127	dREQ;
1423		1128
1424	req->type = ix;	1129	req->type = ix;
1425	req->data = newSVsv (pathname);	1130	req->sv1 = newSVsv (pathname);
1426	req->dataptr = SvPVbyte_nolen (req->data);	1131	req->ptr1 = SvPVbyte_nolen (req->sv1);
1427		1132
1428	REQ_SEND;	1133	REQ_SEND;
1429	}	1134	}
1430		1135
1431	void	1136	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1137	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:	1138	ALIAS:
1437	aio_link = REQ_LINK	1139	aio_link = EIO_LINK
1438	aio_symlink = REQ_SYMLINK	1140	aio_symlink = EIO_SYMLINK
1439	aio_rename = REQ_RENAME	1141	aio_rename = EIO_RENAME
1440	PPCODE:	1142	PPCODE:
1441	{	1143	{
1442	dREQ;	1144	dREQ;
1443		1145
1444	req->type = ix;	1146	req->type = ix;
1445	req->fh = newSVsv (oldpath);	1147	req->sv1 = newSVsv (oldpath);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	1148	req->ptr1 = SvPVbyte_nolen (req->sv1);
1447	req->data = newSVsv (newpath);	1149	req->sv2 = newSVsv (newpath);
1448	req->dataptr = SvPVbyte_nolen (req->data);	1150	req->ptr2 = SvPVbyte_nolen (req->sv2);
1449		1151
1450	REQ_SEND;	1152	REQ_SEND;
1451	}	1153	}
1452		1154
1453	void	1155	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1156	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:	1157	PPCODE:
1460	{	1158	{
1461	dREQ;	1159	dREQ;
1462		1160
1463	req->type = REQ_MKNOD;	1161	req->type = EIO_MKNOD;
1464	req->data = newSVsv (pathname);	1162	req->sv1 = newSVsv (pathname);
1465	req->dataptr = SvPVbyte_nolen (req->data);	1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
1466	req->mode = (mode_t)mode;	1164	req->int2 = (mode_t)mode;
1467	req->offset = dev;	1165	req->offs = dev;
1468		1166
1469	REQ_SEND;	1167	REQ_SEND;
1470	}	1168	}
1471		1169
1472	void	1170	void
		1171	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1172	ALIAS:
		1173	aio_mtouch = EIO_MTOUCH
		1174	aio_msync = EIO_MSYNC
		1175	PROTOTYPE: $$$$;$
		1176	PPCODE:
		1177	{
		1178	STRLEN svlen;
		1179	UV len = SvUV (length);
		1180	char *svptr = SvPVbyte (data, svlen);
		1181
		1182	if (offset < 0)
		1183	offset += svlen;
		1184
		1185	if (offset < 0 || offset > svlen)
		1186	croak ("offset outside of scalar");
		1187
		1188	if (!SvOK (length) || len + offset > svlen)
		1189	len = svlen - offset;
		1190
		1191	{
		1192	dREQ;
		1193
		1194	req->type = ix;
		1195	req->size = len;
		1196	req->sv2 = SvREFCNT_inc (data);
		1197	req->ptr2 = (char *)svptr + offset;
		1198	req->int1 = flags;
		1199
		1200	REQ_SEND;
		1201	}
		1202	}
		1203
		1204	void
1473	aio_busy (delay,callback=&PL_sv_undef)	1205	aio_busy (double delay, SV *callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:	1206	PPCODE:
1477	{	1207	{
1478	dREQ;	1208	dREQ;
1479		1209
1480	req->type = REQ_BUSY;	1210	req->type = EIO_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;	1211	req->nv1 = delay < 0. ? 0. : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483		1212
1484	REQ_SEND;	1213	REQ_SEND;
1485	}	1214	}
1486		1215
1487	void	1216	void
1488	aio_group (callback=&PL_sv_undef)	1217	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$	1218	PROTOTYPE: ;$
1491	PPCODE:	1219	PPCODE:
1492	{	1220	{
1493	dREQ;	1221	dREQ;
1494		1222
1495	req->type = REQ_GROUP;	1223	req->type = EIO_GROUP;
		1224
1496	req_send (req);	1225	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1226	XPUSHs (req_sv (req, aio_grp_stash));
1499	}	1227	}
1500		1228
1501	void	1229	void
1502	aio_nop (callback=&PL_sv_undef)	1230	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1231	ALIAS:
		1232	aio_nop = EIO_NOP
		1233	aio_sync = EIO_SYNC
1504	PPCODE:	1234	PPCODE:
1505	{	1235	{
1506	dREQ;	1236	dREQ;
1507		1237
1508	req->type = REQ_NOP;	1238	req->type = ix;
1509		1239
1510	REQ_SEND;	1240	REQ_SEND;
1511	}	1241	}
1512		1242
1513	int	1243	int
1514	aioreq_pri (int pri = 0)	1244	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$	1245	PROTOTYPE: ;$
1516	CODE:	1246	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1247	RETVAL = next_pri;
1518	if (items > 0)	1248	if (items > 0)
1519	{	1249	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1250	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1251	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1252	next_pri = pri;
1523	}	1253	}
1524	OUTPUT:	1254	OUTPUT:
1525	RETVAL	1255	RETVAL
1526		1256
1527	void	1257	void
1528	aioreq_nice (int nice = 0)	1258	aioreq_nice (int nice = 0)
1529	CODE:	1259	CODE:
1530	nice = next_pri - nice;	1260	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1261	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1262	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1263	next_pri = nice;
1534		1264
1535	void	1265	void
1536	flush ()	1266	flush ()
1537	PROTOTYPE:	1267	PROTOTYPE:
1538	CODE:	1268	CODE:
1539	while (nreqs)	1269	while (eio_nreqs ())
1540	{	1270	{
1541	poll_wait ();	1271	poll_wait ();
1542	poll_cb (0);	1272	poll_cb ();
1543	}	1273	}
1544		1274
1545	void	1275	int
1546	poll()	1276	poll()
1547	PROTOTYPE:	1277	PROTOTYPE:
1548	CODE:	1278	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();	1279	poll_wait ();
1552	poll_cb (0);	1280	RETVAL = poll_cb ();
1553	}	1281	OUTPUT:
		1282	RETVAL
1554		1283
1555	int	1284	int
1556	poll_fileno()	1285	poll_fileno()
1557	PROTOTYPE:	1286	PROTOTYPE:
1558	CODE:	1287	CODE:
1559	RETVAL = respipe [0];	1288	RETVAL = s_epipe_fd (&respipe);
1560	OUTPUT:	1289	OUTPUT:
1561	RETVAL	1290	RETVAL
1562		1291
1563	int	1292	int
1564	poll_cb(...)	1293	poll_cb(...)
1565	PROTOTYPE:	1294	PROTOTYPE:
1566	CODE:	1295	CODE:
1567	RETVAL = poll_cb (0);	1296	RETVAL = poll_cb ();
1568	OUTPUT:	1297	OUTPUT:
1569	RETVAL	1298	RETVAL
1570		1299
1571	int
1572	poll_some(int max = 0)
1573	PROTOTYPE: $
1574	CODE:
1575	RETVAL = poll_cb (max);
1576	OUTPUT:
1577	RETVAL
1578
1579	void	1300	void
1580	poll_wait()	1301	poll_wait()
1581	PROTOTYPE:	1302	PROTOTYPE:
1582	CODE:	1303	CODE:
1583	if (nreqs)
1584	poll_wait ();	1304	poll_wait ();
1585		1305
1586	int	1306	int
1587	nreqs()	1307	nreqs()
1588	PROTOTYPE:	1308	PROTOTYPE:
1589	CODE:	1309	CODE:
1590	RETVAL = nreqs;	1310	RETVAL = eio_nreqs ();
1591	OUTPUT:	1311	OUTPUT:
1592	RETVAL	1312	RETVAL
1593		1313
1594	int	1314	int
1595	nready()	1315	nready()
1596	PROTOTYPE:	1316	PROTOTYPE:
1597	CODE:	1317	CODE:
1598	RETVAL = get_nready ();	1318	RETVAL = eio_nready ();
1599	OUTPUT:	1319	OUTPUT:
1600	RETVAL	1320	RETVAL
1601		1321
1602	int	1322	int
1603	npending()	1323	npending()
1604	PROTOTYPE:	1324	PROTOTYPE:
1605	CODE:	1325	CODE:
1606	RETVAL = get_npending ();	1326	RETVAL = eio_npending ();
1607	OUTPUT:	1327	OUTPUT:
1608	RETVAL	1328	RETVAL
1609		1329
		1330	int
		1331	nthreads()
		1332	PROTOTYPE:
		1333	CODE:
		1334	RETVAL = eio_nthreads ();
		1335	OUTPUT:
		1336	RETVAL
		1337
		1338	int
		1339	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1340	PROTOTYPE: $$$$
		1341	CODE:
		1342	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1343	RETVAL = posix_fadvise (fh, offset, length, advice);
		1344	#else
		1345	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1346	#endif
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	ssize_t
		1351	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1352	PROTOTYPE: $$$$
		1353	CODE:
		1354	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1355	OUTPUT:
		1356	RETVAL
		1357
		1358	void
		1359	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1360	PROTOTYPE: $$$$$;$
		1361	PPCODE:
		1362	sv_unmagic (scalar, MMAP_MAGIC);
		1363	{
		1364	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1365	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1366	if (addr == (void *)-1)
		1367	XSRETURN_NO;
		1368
		1369	/* we store the length in mg_obj, as namlen is I32 :/ */
		1370	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1371	->mg_obj = (SV *)length;
		1372
		1373	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1374	if (!(prot & PROT_WRITE))
		1375	SvREADONLY_on (scalar);
		1376
		1377	SvPVX (scalar) = (char *)addr;
		1378	SvCUR_set (scalar, length);
		1379	SvLEN_set (scalar, 0);
		1380	SvPOK_only (scalar);
		1381
		1382	XSRETURN_YES;
		1383	}
		1384
		1385	void
		1386	munmap (SV *scalar)
		1387	PROTOTYPE: $
		1388	CODE:
		1389	sv_unmagic (scalar, MMAP_MAGIC);
		1390
		1391	int
		1392	mlockall (int flags)
		1393	PROTOTYPE: $
		1394	CODE:
		1395	#if _POSIX_MEMLOCK
		1396	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1397	extern int mallopt (int, int);
		1398	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1399	#endif
		1400	mlockall (flags);
		1401	#else
		1402	RETVAL = -1;
		1403	errno = ENOSYS;
		1404	#endif
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	munlockall ()
		1410	PROTOTYPE:
		1411	CODE:
		1412	#if _POSIX_MEMLOCK
		1413	munlockall ();
		1414	#else
		1415	RETVAL = -1;
		1416	errno = ENOSYS;
		1417	#endif
		1418	OUTPUT:
		1419	RETVAL
		1420
		1421	void _on_next_submit (SV *cb)
		1422	CODE:
		1423	SvREFCNT_dec (on_next_submit);
		1424	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1425
1610	PROTOTYPES: DISABLE	1426	PROTOTYPES: DISABLE
1611		1427
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1428	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1429
1614	void	1430	void
1615	cancel (aio_req_ornot req)	1431	cancel (aio_req_ornot req)
1616	CODE:	1432	CODE:
1617	req_cancel (req);	1433	eio_cancel (req);
1618		1434
1619	void	1435	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1436	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1437	PPCODE:
		1438	{
		1439	if (GIMME_V != G_VOID)
		1440	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1441
		1442	if (items > 1)
		1443	{
		1444	SV *cb_cv =get_cb (callback);
		1445
1622	SvREFCNT_dec (req->callback);	1446	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1447	req->callback = SvREFCNT_inc (cb_cv);
		1448	}
		1449	}
1624		1450
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1451	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1452
1627	void	1453	void
1628	add (aio_req grp, ...)	1454	add (aio_req grp, ...)
1629	PPCODE:	1455	PPCODE:
1630	{	1456	{
1631	int i;	1457	int i;
1632	aio_req req;
1633		1458
1634	if (grp->fd == 2)	1459	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1460	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1461
1637	for (i = 1; i < items; ++i )	1462	for (i = 1; i < items; ++i )
1638	{	1463	{
		1464	aio_req req;
		1465
1639	if (GIMME_V != G_VOID)	1466	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1467	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1468
1642	req = SvAIO_REQ (ST (i));	1469	req = SvAIO_REQ (ST (i));
1643		1470
1644	if (req)	1471	if (req)
1645	{	1472	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	}	1473	}
1658	}	1474	}
1659		1475
1660	void	1476	void
1661	cancel_subs (aio_req_ornot req)	1477	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1486	AV *av;
1671		1487
1672	grp->errorno = errno;	1488	grp->errorno = errno;
1673		1489
1674	av = newAV ();	1490	av = newAV ();
		1491	av_extend (av, items - 1);
1675		1492
1676	for (i = 1; i < items; ++i )	1493	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1494	av_push (av, newSVsv (ST (i)));
1678		1495
1679	SvREFCNT_dec (grp->data);	1496	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1497	grp->sv1 = (SV *)av;
1681	}	1498	}
1682		1499
1683	void	1500	void
1684	errno (aio_req grp, int errorno = errno)	1501	errno (aio_req grp, int errorno = errno)
1685	CODE:	1502	CODE:
1686	grp->errorno = errorno;	1503	grp->errorno = errorno;
1687		1504
1688	void	1505	void
1689	limit (aio_req grp, int limit)	1506	limit (aio_req grp, int limit)
1690	CODE:	1507	CODE:
1691	grp->fd2 = limit;	1508	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1509
1694	void	1510	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1511	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1512	CODE:
1697	{	1513	{
1698	SvREFCNT_dec (grp->fh2);	1514	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1515	grp->sv2 = newSVsv (callback);
		1516	grp->feed = aio_grp_feed;
1700		1517
1701	if (grp->fd2 <= 0)	1518	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1519	grp->int2 = 2;
1703		1520
1704	aio_grp_feed (grp);	1521	eio_grp_limit (grp, grp->int2);
1705	}	1522	}
1706		1523

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