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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 1.208 by root, Sat Jan 7 18:42:43 2012 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>
36	# elif __freebsd
37	# include <sys/socket.h>
38	# include <sys/uio.h>	21	# include <sys/mman.h>
39	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#define EIO_STRUCT_STAT struct _stati64
		68	#define EIO_STRUCT_STATI64
		69
		70	#else
		71
40	# include <sys/socket.h>	72	#include <sys/time.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	73	#include <sys/select.h>
		74	#include <unistd.h>
		75	#include <utime.h>
		76	#include <signal.h>
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	#endif
		81
		82	/* use NV for 32 bit perls as it allows larger offsets */
		83	#if IVSIZE >= 8
		84	# define VAL64 IV
		85	# define SvVAL64 SvIV
		86	# define newSVval64 newSViv
		87	#else
		88	# define VAL64 NV
		89	# define SvVAL64 SvNV
		90	# define newSVval64 newSVnv
		91	#endif
		92
		93	/*****************************************************************************/
		94
		95	#if __GNUC__ >= 3
		96	# define expect(expr,value) __builtin_expect ((expr),(value))
		97	#else
		98	# define expect(expr,value) (expr)
		99	#endif
		100
		101	#define expect_false(expr) expect ((expr) != 0, 0)
		102	#define expect_true(expr) expect ((expr) != 0, 1)
		103
		104	/*****************************************************************************/
		105
		106	typedef SV SV8; /* byte-sv, used for argument-checking */
		107	typedef int aio_rfd; /* read file desriptor */
		108	typedef int aio_wfd; /* write file descriptor */
		109
		110	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	SV *sv3, *sv4; \
		116	STRLEN stroffset; \
		117	SV *self;
		118
		119	#define EIO_NO_WRAPPERS 1
		120
		121	#include "libeio/config.h"
		122	#include "libeio/eio.h"
		123
		124	static int req_invoke (eio_req *req);
		125	#define EIO_FINISH(req) req_invoke (req)
		126	static void req_destroy (eio_req *grp);
		127	#define EIO_DESTROY(req) req_destroy (req)
		128
		129	#include "libeio/eio.c"
		130
		131	/* Linux/others */
		132	#ifndef O_ASYNC
		133	# define O_ASYNC 0
		134	#endif
		135	#ifndef O_DIRECT
		136	# define O_DIRECT 0
		137	#endif
		138	#ifndef O_NOATIME
		139	# define O_NOATIME 0
		140	#endif
		141
		142	/* POSIX */
		143	#ifndef O_CLOEXEC
		144	# define O_CLOEXEC 0
		145	#endif
		146	#ifndef O_NOFOLLOW
		147	# define O_NOFOLLOW 0
		148	#endif
		149	#ifndef O_NOCTTY
		150	# define O_NOCTTY 0
		151	#endif
		152	#ifndef O_NONBLOCK
		153	# define O_NONBLOCK 0
		154	#endif
		155	#ifndef O_EXEC
		156	# define O_EXEC 0
		157	#endif
		158	#ifndef O_SEARCH
		159	# define O_SEARCH 0
		160	#endif
		161	#ifndef O_DIRECTORY
		162	# define O_DIRECTORY 0
		163	#endif
		164	#ifndef O_DSYNC
		165	# define O_DSYNC 0
		166	#endif
		167	#ifndef O_RSYNC
		168	# define O_RSYNC 0
		169	#endif
		170	#ifndef O_SYNC
		171	# define O_SYNC 0
		172	#endif
		173	#ifndef O_TTY_INIT
		174	# define O_TTY_INIT 0
		175	#endif
		176
		177	#ifndef POSIX_FADV_NORMAL
		178	# define POSIX_FADV_NORMAL 0
		179	#endif
		180	#ifndef POSIX_FADV_SEQUENTIAL
		181	# define POSIX_FADV_SEQUENTIAL 0
		182	#endif
		183	#ifndef POSIX_FADV_RANDOM
		184	# define POSIX_FADV_RANDOM 0
		185	#endif
		186	#ifndef POSIX_FADV_NOREUSE
		187	# define POSIX_FADV_NOREUSE 0
		188	#endif
		189	#ifndef POSIX_FADV_WILLNEED
		190	# define POSIX_FADV_WILLNEED 0
		191	#endif
		192	#ifndef POSIX_FADV_DONTNEED
		193	# define POSIX_FADV_DONTNEED 0
		194	#endif
		195
		196	#if !HAVE_POSIX_FADVISE
		197	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#ifndef POSIX_MADV_NORMAL
		201	# define POSIX_MADV_NORMAL 0
		202	#endif
		203	#ifndef POSIX_MADV_SEQUENTIAL
		204	# define POSIX_MADV_SEQUENTIAL 0
		205	#endif
		206	#ifndef POSIX_MADV_RANDOM
		207	# define POSIX_MADV_RANDOM 0
		208	#endif
		209	#ifndef POSIX_MADV_WILLNEED
		210	# define POSIX_MADV_WILLNEED 0
		211	#endif
		212	#ifndef POSIX_MADV_DONTNEED
		213	# define POSIX_MADV_DONTNEED 0
		214	#endif
		215
		216	#if !HAVE_POSIX_MADVISE
		217	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		218	#endif
		219
		220	#ifndef PROT_NONE
		221	# define PROT_NONE 0
		222	#endif
		223	#ifndef PROT_READ
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_WRITE
		227	# define PROT_READ 0
		228	#endif
		229	#ifndef PROT_EXEC
		230	# define PROT_EXEC 0
		231	#endif
		232
		233	#ifndef ST_RDONLY
		234	# define ST_RDONLY 0
		235	#endif
		236	#ifndef ST_NOSUID
		237	# define ST_NOSUID 0
		238	#endif
		239	#ifndef ST_NODEV
		240	# define ST_NODEV 0
		241	#endif
		242	#ifndef ST_NOEXEC
		243	# define ST_NOEXEC 0
		244	#endif
		245	#ifndef ST_SYNCHRONOUS
		246	# define ST_SYNCHRONOUS 0
		247	#endif
		248	#ifndef ST_MANDLOCK
		249	# define ST_MANDLOCK 0
		250	#endif
		251	#ifndef ST_WRITE
		252	# define ST_WRITE 0
		253	#endif
		254	#ifndef ST_APPEND
		255	# define ST_APPEND 0
		256	#endif
		257	#ifndef ST_IMMUTABLE
		258	# define ST_IMMUTABLE 0
		259	#endif
		260	#ifndef ST_NOATIME
		261	# define ST_NOATIME 0
		262	#endif
		263	#ifndef ST_NODIRATIME
		264	# define ST_NODIRATIME 0
		265	#endif
		266	#ifndef ST_RELATIME
		267	# define ST_RELATIME 0
		268	#endif
		269
		270	#ifndef S_IFIFO
		271	# define S_IFIFO 0
		272	#endif
		273	#ifndef S_IFCHR
		274	# define S_IFCHR 0
		275	#endif
		276	#ifndef S_IFBLK
		277	# define S_IFBLK 0
		278	#endif
		279	#ifndef S_IFLNK
		280	# define S_IFLNK 0
		281	#endif
		282	#ifndef S_IFREG
		283	# define S_IFREG 0
		284	#endif
		285	#ifndef S_IFDIR
		286	# define S_IFDIR 0
		287	#endif
		288	#ifndef S_IFWHT
		289	# define S_IFWHT 0
		290	#endif
		291	#ifndef S_IFSOCK
		292	# define S_IFSOCK 0
		293	#endif
		294
		295	#ifndef MAP_ANONYMOUS
		296	# ifdef MAP_ANON
		297	# define MAP_ANONYMOUS MAP_ANON
43	# else	298	# else
44	# error sendfile support requested but not available	299	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	300	# endif
46	#endif	301	#endif
47		302	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	303	# 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	304	#endif
		305	#ifndef MAP_LOCKED
		306	# define MAP_LOCKED 0
79	#endif	307	#endif
		308	#ifndef MAP_NORESERVE
		309	# define MAP_NORESERVE 0
		310	#endif
		311	#ifndef MAP_POPULATE
		312	# define MAP_POPULATE 0
		313	#endif
		314	#ifndef MAP_NONBLOCK
		315	# define MAP_NONBLOCK 0
		316	#endif
80		317
81	/* buffer size for various temporary buffers */	318	#ifndef makedev
82	#define AIO_BUFSIZE 65536	319	# define makedev(maj,min) (((maj) << 8) | (min))
		320	#endif
		321	#ifndef major
		322	# define major(dev) ((dev) >> 8)
		323	#endif
		324	#ifndef minor
		325	# define minor(dev) ((dev) & 0xff)
		326	#endif
83		327
84	#define dBUF \	328	#ifndef PAGESIZE
85	char *aio_buf; \	329	# define PAGESIZE sysconf (_SC_PAGESIZE)
86	LOCK (wrklock); \	330	#endif
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		331
92	enum {	332	enum {
93	REQ_QUIT,	333	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	};	334	};
105		335
106	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108
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;	336	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	337	typedef eio_req *aio_req_ornot;
		338	typedef eio_wd aio_wd;
140		339
141	enum {	340	static SV *on_next_submit;
142	PRI_MIN = -4,	341	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	342	static int max_outstanding;
144		343
145	DEFAULT_PRI = 0,	344	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		345
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);	346	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	347	static void req_cancel (aio_req req);
301		348
		349	static void
		350	want_poll (void)
		351	{
		352	/* write a dummy byte to the pipe so fh becomes ready */
		353	s_epipe_signal (&respipe);
		354	}
		355
		356	static void
		357	done_poll (void)
		358	{
		359	/* read any signals sent by the worker threads */
		360	s_epipe_drain (&respipe);
		361	}
		362
302	/* must be called at most once */	363	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	364	static SV *
		365	req_sv (aio_req req, HV *stash)
304	{	366	{
305	if (!req->self)	367	if (!req->self)
306	{	368	{
307	req->self = (SV *)newHV ();	369	req->self = (SV *)newHV ();
308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309	}	371	}
310		372
311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	373	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
312	}	374	}
313		375
314	static aio_req SvAIO_REQ (SV *sv)	376	static SV *
		377	newSVaio_wd (aio_wd wd)
		378	{
		379	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		380	}
		381
		382	static aio_req
		383	SvAIO_REQ (SV *sv)
315	{	384	{
316	MAGIC *mg;	385	MAGIC *mg;
317		386
318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	387	if (!SvROK (sv)
		388	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		389	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		390	&& SvSTASH (SvRV (sv)) != aio_req_stash
		391	&& !sv_derived_from (sv, "IO::AIO::REQ")))
319	croak ("object of class " AIO_REQ_KLASS " expected");	392	croak ("object of class IO::AIO::REQ expected");
320		393
321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	394	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322		395
323	return mg ? (aio_req)mg->mg_ptr : 0;	396	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	397	}
325		398
		399	static aio_wd
		400	SvAIO_WD (SV *sv)
		401	{
		402	if (!SvROK (sv)
		403	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		404	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		405	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		406
		407	return (aio_wd)(long)SvIVX (SvRV (sv));
		408	}
		409
		410	static void
326	static void aio_grp_feed (aio_req grp)	411	aio_grp_feed (aio_req grp)
327	{	412	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	413	if (grp->sv2 && SvOK (grp->sv2))
329	{	414	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	415	dSP;
335		416
336	ENTER;	417	ENTER;
337	SAVETMPS;	418	SAVETMPS;
338	PUSHMARK (SP);	419	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	420	XPUSHs (req_sv (grp, aio_grp_stash));
340	PUTBACK;	421	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	422	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	423	SPAGAIN;
343	FREETMPS;	424	FREETMPS;
344	LEAVE;	425	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	}	426	}
355	}	427	}
356		428
357	static void aio_grp_dec (aio_req grp)	429	static void
		430	req_submit (eio_req *req)
358	{	431	{
359	--grp->length;	432	eio_submit (req);
360		433
361	/* call feeder, if applicable */	434	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	435	{
367	req_invoke (grp);	436	dSP;
368	req_free (grp);	437	SV *cb = sv_2mortal (on_next_submit);
		438
		439	on_next_submit = 0;
		440
		441	PUSHMARK (SP);
		442	PUTBACK;
		443	call_sv (cb, G_DISCARD | G_EVAL);
369	}	444	}
370	}	445	}
371		446
		447	static int
372	static void req_invoke (aio_req req)	448	req_invoke (eio_req *req)
373	{	449	{
374	dSP;	450	if (req->flags & FLAG_SV2_RO_OFF)
		451	SvREADONLY_off (req->sv2);
375		452
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	453	if (!EIO_CANCELLED (req) && req->callback)
377	{	454	{
		455	dSP;
		456	static SV *sv_result_cache; /* caches the result integer SV */
		457	SV *sv_result;
		458
378	ENTER;	459	ENTER;
379	SAVETMPS;	460	SAVETMPS;
380	PUSHMARK (SP);	461	PUSHMARK (SP);
381	EXTEND (SP, 1);	462	EXTEND (SP, 1);
382		463
		464	/* do not recreate the result IV from scratch each time */
		465	if (expect_true (sv_result_cache))
		466	{
		467	sv_result = sv_result_cache; sv_result_cache = 0;
		468	SvIV_set (sv_result, req->result);
		469	SvIOK_only (sv_result);
		470	}
		471	else
		472	{
		473	sv_result = newSViv (req->result);
		474	SvREADONLY_on (sv_result);
		475	}
		476
383	switch (req->type)	477	switch (req->type)
384	{	478	{
		479	case EIO_WD_OPEN:
		480	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		481	break;
		482
385	case REQ_READDIR:	483	case EIO_READDIR:
386	{	484	{
387	SV *rv = &PL_sv_undef;	485	SV *rv = &PL_sv_undef;
388		486
389	if (req->result >= 0)	487	if (req->result >= 0)
390	{	488	{
391	int i;	489	int i;
392	char *buf = req->data2ptr;	490	char *names = (char *)req->ptr2;
		491	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	492	AV *av = newAV ();
394		493
395	av_extend (av, req->result - 1);	494	av_extend (av, req->result - 1);
396		495
397	for (i = 0; i < req->result; ++i)	496	for (i = 0; i < req->result; ++i)
398	{	497	{
399	SV *sv = newSVpv (buf, 0);	498	if (req->int1 & EIO_READDIR_DENTS)
		499	{
		500	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		501
		502	if (req->int1 & EIO_READDIR_CUSTOM2)
		503	{
		504	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		505	AV *avent = newAV ();
		506
		507	av_extend (avent, 2);
		508
		509	if (!sv_type [ent->type])
		510	{
		511	sv_type [ent->type] = newSViv (ent->type);
		512	SvREADONLY_on (sv_type [ent->type]);
		513	}
		514
		515	av_store (avent, 0, namesv);
		516	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		517	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		518
		519	av_store (av, i, newRV_noinc ((SV *)avent));
		520	}
		521	else
401	av_store (av, i, sv);	522	av_store (av, i, namesv);
		523
		524	++ent;
		525	}
		526	else
		527	{
		528	SV *name = newSVpv (names, 0);
		529	av_store (av, i, name);
402	buf += SvCUR (sv) + 1;	530	names += SvCUR (name) + 1;
		531	}
403	}	532	}
404		533
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	534	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	535	}
407		536
408	PUSHs (rv);	537	PUSHs (rv);
		538
		539	if (req->int1 & EIO_READDIR_CUSTOM1)
		540	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
409	}	541	}
410	break;	542	break;
411		543
412	case REQ_OPEN:	544	case EIO_OPEN:
413	{	545	{
414	/* convert fd to fh */	546	/* convert fd to fh */
415	SV *fh;	547	SV *fh = &PL_sv_undef;
416		548
417	PUSHs (sv_2mortal (newSViv (req->result)));	549	if (req->result >= 0)
418	PUTBACK;	550	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	551	GV *gv = (GV *)sv_newmortal ();
420	SPAGAIN;	552	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		553	char sym [64];
		554	int symlen;
		555
		556	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		557	gv_init (gv, aio_stash, sym, symlen, 0);
421		558
422	fh = SvREFCNT_inc (POPs);	559	symlen = snprintf (
		560	sym,
		561	sizeof (sym),
		562	"%s&=%d",
		563	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		564	(int)req->result
		565	);
423		566
		567	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		568	fh = (SV *)gv;
		569	}
		570
424	PUSHMARK (SP);	571	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	572	}
427	break;	573	break;
428		574
		575	case EIO_STATVFS:
		576	case EIO_FSTATVFS:
		577	{
		578	SV *rv = &PL_sv_undef;
		579
		580	#ifndef _WIN32
		581	if (req->result >= 0)
		582	{
		583	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		584	HV *hv = newHV ();
		585
		586	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		587
		588	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		589	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		590	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		591	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		592	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		593	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		594	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		595	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		596	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		597	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		598	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		599	}
		600	#endif
		601
		602	PUSHs (rv);
		603	}
		604
		605	break;
		606
429	case REQ_GROUP:	607	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	608	req->int1 = 2; /* mark group as finished */
431		609
432	if (req->data)	610	if (req->sv1)
433	{	611	{
434	int i;	612	int i;
435	AV *av = (AV *)req->data;	613	AV *av = (AV *)req->sv1;
436		614
437	EXTEND (SP, AvFILL (av) + 1);	615	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	616	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	617	PUSHs (*av_fetch (av, i, 0));
440	}	618	}
441	break;	619	break;
442		620
443	case REQ_NOP:	621	case EIO_NOP:
444	case REQ_BUSY:	622	case EIO_BUSY:
445	break;	623	break;
446		624
		625	case EIO_READLINK:
		626	case EIO_REALPATH:
		627	if (req->result > 0)
		628	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		629	break;
		630
		631	case EIO_STAT:
		632	case EIO_LSTAT:
		633	case EIO_FSTAT:
		634	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		635
		636	if (!(PL_laststatval = req->result))
		637	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		638	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		639
		640	PUSHs (sv_result);
		641	break;
		642
		643	case EIO_READ:
		644	{
		645	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		646	*SvEND (req->sv2) = 0;
		647	SvPOK_only (req->sv2);
		648	SvSETMAGIC (req->sv2);
		649	PUSHs (sv_result);
		650	}
		651	break;
		652
		653	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		654	if (req->result > 0)
		655	SvIV_set (sv_result, 0);
		656	/* FALLTHROUGH */
		657
447	default:	658	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	659	PUSHs (sv_result);
449	break;	660	break;
450	}	661	}
451		662
452	errno = req->errorno;	663	errno = req->errorno;
453		664
454	PUTBACK;	665	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	666	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	667	SPAGAIN;
		668
		669	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		670	SvREFCNT_dec (sv_result);
		671	else
		672	sv_result_cache = sv_result;
457		673
458	FREETMPS;	674	FREETMPS;
459	LEAVE;	675	LEAVE;
		676
		677	PUTBACK;
460	}	678	}
461		679
462	if (req->grp)	680	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	}	681	}
482		682
483	static void req_free (aio_req req)	683	static void
		684	req_destroy (aio_req req)
484	{	685	{
485	if (req->self)	686	if (req->self)
486	{	687	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	688	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	689	SvREFCNT_dec (req->self);
489	}	690	}
490		691
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	692	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	693	SvREFCNT_dec (req->sv2);
		694	SvREFCNT_dec (req->sv3);
		695	SvREFCNT_dec (req->sv4);
494	SvREFCNT_dec (req->callback);	696	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496		697
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499
500	Safefree (req);	698	free (req);
501	}	699	}
502		700
		701	static void
503	static void req_cancel_subs (aio_req grp)	702	req_cancel_subs (aio_req grp)
504	{	703	{
505	aio_req sub;
506
507	if (grp->type != REQ_GROUP)	704	if (grp->type != EIO_GROUP)
508	return;	705	return;
509		706
510	SvREFCNT_dec (grp->fh2);	707	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	708	grp->sv2 = 0;
512		709
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	710	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	711	}
516		712
517	static void req_cancel (aio_req req)	713	static void ecb_cold
		714	create_respipe (void)
518	{	715	{
519	req->flags |= FLAG_CANCELLED;	716	if (s_epipe_renew (&respipe))
520		717	croak ("IO::AIO: unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	718	}
523		719
524	static void *aio_proc(void *arg);	720	static void
525		721	poll_wait (void)
526	static void start_thread (void)
527	{	722	{
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 ()
623	{
624	fd_set rfd;
625
626	while (nreqs)	723	while (eio_nreqs ())
627	{	724	{
628	int size;	725	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	726
		727	X_LOCK (reslock);
630	size = res_queue.size;	728	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	729	X_UNLOCK (reslock);
632		730
633	if (size)	731	if (size)
634	return;	732	return;
635		733
636	maybe_start_thread ();	734	etp_maybe_start_thread ();
637		735
638	FD_ZERO(&rfd);	736	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	737	}
643	}	738	}
644		739
645	static int poll_cb (int max)	740	static int
		741	poll_cb (void)
646	{	742	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	743	for (;;)
653	{	744	{
654	while (max <= 0 || count < max)	745	int res = eio_poll ();
		746
		747	if (res > 0)
		748	croak (0);
		749
		750	if (!max_outstanding || max_outstanding > eio_nreqs ())
		751	return res;
		752
		753	poll_wait ();
		754	}
		755	}
		756
		757	static void ecb_cold
		758	reinit (void)
		759	{
		760	create_respipe ();
		761
		762	if (eio_init (want_poll, done_poll) < 0)
		763	croak ("IO::AIO: unable to initialise eio library");
		764	}
		765
		766	/*****************************************************************************/
		767
		768	#if !_POSIX_MAPPED_FILES
		769	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		770	# define munmap(addr,length) (errno = ENOSYS, -1)
		771	#endif
		772
		773	#if !_POSIX_MEMORY_PROTECTION
		774	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		775	# define PROT_NONE 0
		776	# define PROT_WRITE 0
		777	# define MAP_PRIVATE 0
		778	# define MAP_SHARED 0
		779	# define MAP_FIXED 0
		780	#endif
		781
		782	#define MMAP_MAGIC PERL_MAGIC_ext
		783
		784	static int ecb_cold
		785	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		786	{
		787	int old_errno = errno;
		788	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		789	errno = old_errno;
		790
		791	mg->mg_obj = 0; /* just in case */
		792
		793	SvREADONLY_off (sv);
		794
		795	if (SvPVX (sv) != mg->mg_ptr)
		796	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		797
		798	SvCUR_set (sv, 0);
		799	SvPVX (sv) = 0;
		800	SvOK_off (sv);
		801
		802	return 0;
		803	}
		804
		805	static MGVTBL mmap_vtbl = {
		806	0, 0, 0, 0, mmap_free
		807	};
		808
		809	/*****************************************************************************/
		810
		811	static SV *
		812	get_cb (SV *cb_sv)
		813	{
		814	SvGETMAGIC (cb_sv);
		815	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		816	}
		817
		818	static aio_req ecb_noinline
		819	dreq (SV *callback)
		820	{
		821	SV *cb_cv;
		822	aio_req req;
		823	int req_pri = next_pri;
		824	next_pri = EIO_PRI_DEFAULT;
		825
		826	cb_cv = get_cb (callback);
		827
		828	req = calloc (sizeof (*req), 1);
		829	if (!req)
		830	croak ("out of memory during eio_req allocation");
		831
		832	req->callback = SvREFCNT_inc (cb_cv);
		833	req->pri = req_pri;
		834
		835	return req;
		836	}
		837
		838	#define dREQ \
		839	aio_req req = dreq (callback); \
		840
		841	#define REQ_SEND \
		842	PUTBACK; \
		843	req_submit (req); \
		844	SPAGAIN; \
		845	\
		846	if (GIMME_V != G_VOID) \
		847	XPUSHs (req_sv (req, aio_req_stash));
		848
		849	ecb_inline void
		850	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		851	{
		852	if (expect_false (SvROK (path)))
		853	{
		854	SV *rv = SvRV (path);
		855	SV *wdob;
		856
		857	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
655	{	858	{
656	maybe_start_thread ();	859	path = AvARRAY (rv)[1];
		860	wdob = AvARRAY (rv)[0];
657		861
658	LOCK (reslock);	862	if (SvOK (wdob))
659	req = reqq_shift (&res_queue);
660
661	if (req)
662	{	863	{
663	--npending;	864	*wd = SvAIO_WD (wdob);
664		865	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
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	}	866	}
686	else	867	else
687	{	868	*wd = EIO_INVALID_WD;
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	}	869	}
		870	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		871	{
		872	*wd = (aio_wd)(long)SvIVX (rv);
		873	*wdsv = SvREFCNT_inc_NN (rv);
		874	*ptr = ".";
		875	return; /* path set to "." */
		876	}
		877	else
		878	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		879	}
708		880
709	if (nreqs <= max_outstanding)	881	*pathsv = newSVsv (path);
		882	*ptr = SvPVbyte_nolen (*pathsv);
		883	}
		884
		885	static void ecb_noinline
		886	req_set_path1 (aio_req req, SV *path)
		887	{
		888	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		889	}
		890
		891	static void ecb_noinline
		892	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		893	{
		894	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		895
		896	switch (SvTYPE (rv))
		897	{
		898	case SVt_PVIO:
		899	case SVt_PVLV:
		900	case SVt_PVGV:
		901	req->type = type_fh;
		902	req->sv1 = newSVsv (fh_or_path);
		903	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
710	break;	904	break;
711		905
712	poll_wait ();	906	default:
713		907	req->type = type_path;
714	max = 0;	908	req_set_path1 (req, fh_or_path);
		909	break;
715	}	910	}
716
717	return count;
718	}	911	}
719		912
720	static void create_pipe ()	913	XS(boot_IO__AIO) ecb_cold;
721	{
722	if (pipe (respipe))
723	croak ("unable to initialize result pipe");
724		914
725	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
726	croak ("cannot set result pipe to nonblocking mode");
727
728	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
729	croak ("cannot set result pipe to nonblocking mode");
730	}
731
732	/*****************************************************************************/
733	/* work around various missing functions */
734
735	#if !HAVE_PREADWRITE
736	# define pread aio_pread
737	# define pwrite aio_pwrite
738
739	/*
740	* make our pread/pwrite safe against themselves, but not against
741	* normal read/write by using a mutex. slows down execution a lot,
742	* but that's your problem, not mine.
743	*/
744	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
745
746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
747	{
748	ssize_t res;
749	off_t ooffset;
750
751	LOCK (preadwritelock);
752	ooffset = lseek (fd, 0, SEEK_CUR);
753	lseek (fd, offset, SEEK_SET);
754	res = read (fd, buf, count);
755	lseek (fd, ooffset, SEEK_SET);
756	UNLOCK (preadwritelock);
757
758	return res;
759	}
760
761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = write (fd, buf, count);
770	lseek (fd, offset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775	#endif
776
777	#if !HAVE_FDATASYNC
778	# define fdatasync fsync
779	#endif
780
781	#if !HAVE_READAHEAD
782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
783
784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
785	{
786	dBUF;
787
788	while (count > 0)
789	{
790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
791
792	pread (fd, aio_buf, len, offset);
793	offset += len;
794	count -= len;
795	}
796
797	errno = 0;
798	}
799
800	#endif
801
802	#if !HAVE_READDIR_R
803	# define readdir_r aio_readdir_r
804
805	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
806
807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
808	{
809	struct dirent *e;
810	int errorno;
811
812	LOCK (readdirlock);
813
814	e = readdir (dirp);
815	errorno = errno;
816
817	if (e)
818	{
819	*res = ent;
820	strcpy (ent->d_name, e->d_name);
821	}
822	else
823	*res = 0;
824
825	UNLOCK (readdirlock);
826
827	errno = errorno;
828	return e ? 0 : -1;
829	}
830	#endif
831
832	/* sendfile always needs emulation */
833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
834	{
835	ssize_t res;
836
837	if (!count)
838	return 0;
839
840	#if HAVE_SENDFILE
841	# if __linux
842	res = sendfile (ofd, ifd, &offset, count);
843
844	# elif __freebsd
845	/*
846	* Of course, the freebsd sendfile is a dire hack with no thoughts
847	* wasted on making it similar to other I/O functions.
848	*/
849	{
850	off_t sbytes;
851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853	if (res < 0 && sbytes)
854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855	res = sbytes;
856	}
857
858	# elif __hpux
859	res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861	# elif __solaris
862	{
863	struct sendfilevec vec;
864	size_t sbytes;
865
866	vec.sfv_fd = ifd;
867	vec.sfv_flag = 0;
868	vec.sfv_off = offset;
869	vec.sfv_len = count;
870
871	res = sendfilev (ofd, &vec, 1, &sbytes);
872
873	if (res < 0 && sbytes)
874	res = sbytes;
875	}
876
877	# endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882
883	if (res < 0
884	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885	#if __solaris
886	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
887	#endif
888	)
889	)
890	{
891	/* emulate sendfile. this is a major pain in the ass */
892	dBUF;
893
894	res = 0;
895
896	while (count)
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901
902	if (cnt <= 0)
903	{
904	if (cnt && !res) res = -1;
905	break;
906	}
907
908	cnt = write (ofd, aio_buf, cnt);
909
910	if (cnt <= 0)
911	{
912	if (cnt && !res) res = -1;
913	break;
914	}
915
916	offset += cnt;
917	res += cnt;
918	count -= cnt;
919	}
920	}
921
922	return res;
923	}
924
925	/* read a full directory */
926	static void scandir_ (aio_req req, worker *self)
927	{
928	DIR *dirp;
929	union
930	{
931	struct dirent d;
932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
933	} *u;
934	struct dirent *entp;
935	char *name, *names;
936	int memlen = 4096;
937	int memofs = 0;
938	int res = 0;
939	int errorno;
940
941	LOCK (wrklock);
942	self->dirp = dirp = opendir (req->dataptr);
943	self->dbuf = u = malloc (sizeof (*u));
944	req->data2ptr = names = malloc (memlen);
945	UNLOCK (wrklock);
946
947	if (dirp && u && names)
948	for (;;)
949	{
950	errno = 0;
951	readdir_r (dirp, &u->d, &entp);
952
953	if (!entp)
954	break;
955
956	name = entp->d_name;
957
958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
959	{
960	int len = strlen (name) + 1;
961
962	res++;
963
964	while (memofs + len > memlen)
965	{
966	memlen *= 2;
967	LOCK (wrklock);
968	req->data2ptr = names = realloc (names, memlen);
969	UNLOCK (wrklock);
970
971	if (!names)
972	break;
973	}
974
975	memcpy (names + memofs, name, len);
976	memofs += len;
977	}
978	}
979
980	if (errno)
981	res = -1;
982
983	req->result = res;
984	}
985
986	/*****************************************************************************/
987
988	static void *aio_proc (void *thr_arg)
989	{
990	aio_req req;
991	struct timespec ts;
992	worker *self = (worker *)thr_arg;
993
994	/* try to distribute timeouts somewhat evenly */
995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
996	* (1000000000UL / 1024UL);
997
998	for (;;)
999	{
1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1001
1002	LOCK (reqlock);
1003
1004	for (;;)
1005	{
1006	self->req = req = reqq_shift (&req_queue);
1007
1008	if (req)
1009	break;
1010
1011	++idle;
1012
1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1014	== ETIMEDOUT)
1015	{
1016	if (idle > max_idle)
1017	{
1018	--idle;
1019	UNLOCK (reqlock);
1020	LOCK (wrklock);
1021	--started;
1022	UNLOCK (wrklock);
1023	goto quit;
1024	}
1025
1026	/* we are allowed to idle, so do so without any timeout */
1027	pthread_cond_wait (&reqwait, &reqlock);
1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1029	}
1030
1031	--idle;
1032	}
1033
1034	--nready;
1035
1036	UNLOCK (reqlock);
1037
1038	errno = 0; /* strictly unnecessary */
1039
1040	if (!(req->flags & FLAG_CANCELLED))
1041	switch (req->type)
1042	{
1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1045
1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1048
1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1052
1053	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1054	case REQ_CLOSE: req->result = close (req->fd); break;
1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1061
1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
1064	case REQ_READDIR: scandir_ (req, self); break;
1065
1066	case REQ_BUSY:
1067	{
1068	struct timeval tv;
1069
1070	tv.tv_sec = req->fd;
1071	tv.tv_usec = req->fd2;
1072
1073	req->result = select (0, 0, 0, 0, &tv);
1074	}
1075
1076	case REQ_GROUP:
1077	case REQ_NOP:
1078	break;
1079
1080	case REQ_QUIT:
1081	goto quit;
1082
1083	default:
1084	req->result = ENOSYS;
1085	break;
1086	}
1087
1088	req->errorno = errno;
1089
1090	LOCK (reslock);
1091
1092	++npending;
1093
1094	if (!reqq_push (&res_queue, req))
1095	/* write a dummy byte to the pipe so fh becomes ready */
1096	write (respipe [1], &respipe, 1);
1097
1098	self->req = 0;
1099	worker_clear (self);
1100
1101	UNLOCK (reslock);
1102	}
1103
1104	quit:
1105	LOCK (wrklock);
1106	worker_free (self);
1107	UNLOCK (wrklock);
1108
1109	return 0;
1110	}
1111
1112	/*****************************************************************************/
1113
1114	static void atfork_prepare (void)
1115	{
1116	LOCK (wrklock);
1117	LOCK (reqlock);
1118	LOCK (reslock);
1119	#if !HAVE_PREADWRITE
1120	LOCK (preadwritelock);
1121	#endif
1122	#if !HAVE_READDIR_R
1123	LOCK (readdirlock);
1124	#endif
1125	}
1126
1127	static void atfork_parent (void)
1128	{
1129	#if !HAVE_READDIR_R
1130	UNLOCK (readdirlock);
1131	#endif
1132	#if !HAVE_PREADWRITE
1133	UNLOCK (preadwritelock);
1134	#endif
1135	UNLOCK (reslock);
1136	UNLOCK (reqlock);
1137	UNLOCK (wrklock);
1138	}
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	}
1173
1174	#define dREQ \
1175	aio_req req; \
1176	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
1178	\
1179	if (SvOK (callback) && !SvROK (callback)) \
1180	croak ("callback must be undef or of reference type"); \
1181	\
1182	Newz (0, req, 1, aio_cb); \
1183	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \
1185	\
1186	req->callback = newSVsv (callback); \
1187	req->pri = req_pri
1188
1189	#define REQ_SEND \
1190	req_send (req); \
1191	\
1192	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1194
1195	MODULE = IO::AIO PACKAGE = IO::AIO	915	MODULE = IO::AIO PACKAGE = IO::AIO
1196		916
1197	PROTOTYPES: ENABLE	917	PROTOTYPES: ENABLE
1198		918
1199	BOOT:	919	BOOT:
1200	{	920	{
		921	static const struct {
		922	const char *name;
		923	IV iv;
		924	} *civ, const_iv[] = {
		925	# define const_niv(name, value) { # name, (IV) value },
		926	# define const_iv(name) { # name, (IV) name },
		927	# define const_eio(name) { # name, (IV) EIO_ ## name },
		928	const_iv (EXDEV)
		929	const_iv (ENOSYS)
		930	const_iv (O_RDONLY)
		931	const_iv (O_WRONLY)
		932	const_iv (O_RDWR)
		933	const_iv (O_CREAT)
		934	const_iv (O_TRUNC)
		935	const_iv (O_EXCL)
		936	const_iv (O_APPEND)
		937
		938	const_iv (O_ASYNC)
		939	const_iv (O_DIRECT)
		940	const_iv (O_NOATIME)
		941
		942	const_iv (O_CLOEXEC)
		943	const_iv (O_NOCTTY)
		944	const_iv (O_NOFOLLOW)
		945	const_iv (O_NONBLOCK)
		946	const_iv (O_EXEC)
		947	const_iv (O_SEARCH)
		948	const_iv (O_DIRECTORY)
		949	const_iv (O_DSYNC)
		950	const_iv (O_RSYNC)
		951	const_iv (O_SYNC)
		952	const_iv (O_TTY_INIT)
		953
		954	const_iv (S_IFIFO)
		955	const_iv (S_IFCHR)
		956	const_iv (S_IFBLK)
		957	const_iv (S_IFLNK)
		958	const_iv (S_IFREG)
		959	const_iv (S_IFDIR)
		960	const_iv (S_IFWHT)
		961	const_iv (S_IFSOCK)
		962	const_iv (S_IFMT)
		963
		964	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		965	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		966	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		967	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		968	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		969	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		970
		971	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		972	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		973	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		974	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		975	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		976
		977	const_iv (ST_RDONLY)
		978	const_iv (ST_NOSUID)
		979	const_iv (ST_NODEV)
		980	const_iv (ST_NOEXEC)
		981	const_iv (ST_SYNCHRONOUS)
		982	const_iv (ST_MANDLOCK)
		983	const_iv (ST_WRITE)
		984	const_iv (ST_APPEND)
		985	const_iv (ST_IMMUTABLE)
		986	const_iv (ST_NOATIME)
		987	const_iv (ST_NODIRATIME)
		988	const_iv (ST_RELATIME)
		989
		990	const_iv (PROT_NONE)
		991	const_iv (PROT_EXEC)
		992	const_iv (PROT_READ)
		993	const_iv (PROT_WRITE)
		994
		995	/*const_iv (MAP_FIXED)*/
		996	const_iv (MAP_PRIVATE)
		997	const_iv (MAP_SHARED)
		998	const_iv (MAP_ANONYMOUS)
		999
		1000	/* linuxish */
		1001	const_iv (MAP_HUGETLB)
		1002	const_iv (MAP_LOCKED)
		1003	const_iv (MAP_NORESERVE)
		1004	const_iv (MAP_POPULATE)
		1005	const_iv (MAP_NONBLOCK)
		1006
		1007	const_eio (MCL_FUTURE)
		1008	const_eio (MCL_CURRENT)
		1009
		1010	const_eio (MS_ASYNC)
		1011	const_eio (MS_INVALIDATE)
		1012	const_eio (MS_SYNC)
		1013
		1014	const_eio (MT_MODIFY)
		1015
		1016	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1017	const_eio (SYNC_FILE_RANGE_WRITE)
		1018	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1019
		1020	const_eio (FALLOC_FL_KEEP_SIZE)
		1021
		1022	const_eio (READDIR_DENTS)
		1023	const_eio (READDIR_DIRS_FIRST)
		1024	const_eio (READDIR_STAT_ORDER)
		1025	const_eio (READDIR_FOUND_UNKNOWN)
		1026
		1027	const_eio (DT_UNKNOWN)
		1028	const_eio (DT_FIFO)
		1029	const_eio (DT_CHR)
		1030	const_eio (DT_DIR)
		1031	const_eio (DT_BLK)
		1032	const_eio (DT_REG)
		1033	const_eio (DT_LNK)
		1034	const_eio (DT_SOCK)
		1035	const_eio (DT_WHT)
		1036	};
		1037
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	1038	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1039	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1040	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1041	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1202		1042
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1043	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1044	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].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		1045
1210	create_pipe ();	1046	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1212	}
1213		1047
		1048	reinit ();
		1049	}
		1050
1214	void	1051	void
1215	min_parallel (int nthreads)	1052	reinit ()
1216	PROTOTYPE: $	1053	PROTOTYPE:
1217		1054
1218	void	1055	void
1219	max_parallel (int nthreads)	1056	max_poll_reqs (unsigned int nreqs)
1220	PROTOTYPE: $
1221
1222	int
1223	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	1057	PROTOTYPE: $
1225	CODE:	1058	CODE:
1226	RETVAL = max_outstanding;	1059	eio_set_max_poll_reqs (nreqs);
		1060
		1061	void
		1062	max_poll_time (double nseconds)
		1063	PROTOTYPE: $
		1064	CODE:
		1065	eio_set_max_poll_time (nseconds);
		1066
		1067	void
		1068	min_parallel (unsigned int nthreads)
		1069	PROTOTYPE: $
		1070	CODE:
		1071	eio_set_min_parallel (nthreads);
		1072
		1073	void
		1074	max_parallel (unsigned int nthreads)
		1075	PROTOTYPE: $
		1076	CODE:
		1077	eio_set_max_parallel (nthreads);
		1078
		1079	void
		1080	max_idle (unsigned int nthreads)
		1081	PROTOTYPE: $
		1082	CODE:
		1083	eio_set_max_idle (nthreads);
		1084
		1085	void
		1086	idle_timeout (unsigned int seconds)
		1087	PROTOTYPE: $
		1088	CODE:
		1089	eio_set_idle_timeout (seconds);
		1090
		1091	void
		1092	max_outstanding (unsigned int maxreqs)
		1093	PROTOTYPE: $
		1094	CODE:
1227	max_outstanding = maxreqs;	1095	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		1096
1231	void	1097	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1098	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
1233	SV * pathname
1234	int flags
1235	int mode
1236	SV * callback
1237	PROTOTYPE: $$$;$
1238	PPCODE:	1099	PPCODE:
1239	{	1100	{
1240	dREQ;	1101	dREQ;
1241		1102
1242	req->type = REQ_OPEN;	1103	req->type = EIO_WD_OPEN;
1243	req->data = newSVsv (pathname);	1104	req_set_path1 (req, pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);
1245	req->fd = flags;
1246	req->mode = mode;
1247		1105
1248	REQ_SEND;	1106	REQ_SEND;
1249	}	1107	}
1250		1108
1251	void	1109	void
		1110	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1111	PPCODE:
		1112	{
		1113	dREQ;
		1114
		1115	req->type = EIO_OPEN;
		1116	req_set_path1 (req, pathname);
		1117	req->int1 = flags;
		1118	req->int2 = mode;
		1119
		1120	REQ_SEND;
		1121	}
		1122
		1123	void
1252	aio_close (fh,callback=&PL_sv_undef)	1124	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$
1256	ALIAS:	1125	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	1126	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	1127	aio_fdatasync = EIO_FDATASYNC
		1128	aio_syncfs = EIO_SYNCFS
1260	PPCODE:	1129	PPCODE:
1261	{	1130	{
		1131	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	1132	dREQ;
1263		1133
1264	req->type = ix;	1134	req->type = ix;
1265	req->fh = newSVsv (fh);	1135	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1136	req->int1 = fd;
1267		1137
1268	REQ_SEND (req);	1138	REQ_SEND (req);
1269	}	1139	}
1270		1140
1271	void	1141	void
		1142	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1143	PPCODE:
		1144	{
		1145	int fd = s_fileno_croak (fh, 0);
		1146	dREQ;
		1147
		1148	req->type = EIO_SYNC_FILE_RANGE;
		1149	req->sv1 = newSVsv (fh);
		1150	req->int1 = fd;
		1151	req->offs = offset;
		1152	req->size = nbytes;
		1153	req->int2 = flags;
		1154
		1155	REQ_SEND (req);
		1156	}
		1157
		1158	void
		1159	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	int fd = s_fileno_croak (fh, 0);
		1163	dREQ;
		1164
		1165	req->type = EIO_FALLOCATE;
		1166	req->sv1 = newSVsv (fh);
		1167	req->int1 = fd;
		1168	req->int2 = mode;
		1169	req->offs = offset;
		1170	req->size = len;
		1171
		1172	REQ_SEND (req);
		1173	}
		1174
		1175	void
		1176	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1177	PPCODE:
		1178	{
		1179	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1180	int fd = s_fileno_croak (fh, 0);
		1181	dREQ;
		1182
		1183	if (expect_false (close_fd < 0))
		1184	{
		1185	int pipefd [2];
		1186
		1187	if (
		1188	#ifdef _WIN32
		1189	_pipe (pipefd, 1, _O_BINARY) < 0
		1190	#else
		1191	pipe (pipefd) < 0
		1192	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1193	#endif
		1194	|| close (pipefd [1]) < 0
		1195	)
		1196	abort (); /*D*/
		1197
		1198	close_fd = pipefd [0];
		1199	}
		1200
		1201	req->type = EIO_DUP2;
		1202	req->int1 = close_fd;
		1203	req->sv2 = newSVsv (fh);
		1204	req->int2 = fd;
		1205
		1206	REQ_SEND (req);
		1207	}
		1208
		1209	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1210	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:	1211	ALIAS:
1280	aio_read = REQ_READ	1212	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	1213	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$
1283	PPCODE:	1214	PPCODE:
1284	{	1215	{
1285	aio_req req;
1286	STRLEN svlen;	1216	STRLEN svlen;
		1217	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	1218	char *svptr = SvPVbyte (data, svlen);
1288		1219	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		1220
1292	if (dataoffset < 0)	1221	if (dataoffset < 0)
1293	dataoffset += svlen;	1222	dataoffset += svlen;
1294		1223
1295	if (dataoffset < 0 || dataoffset > svlen)	1224	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	1225	croak ("dataoffset outside of data scalar");
1297		1226
1298	if (ix == REQ_WRITE)	1227	if (ix == EIO_WRITE)
1299	{	1228	{
1300	/* write: check length and adjust. */	1229	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	1230	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	1231	len = svlen - dataoffset;
1303	}	1232	}
1304	else	1233	else
1305	{	1234	{
1306	/* read: grow scalar as necessary */	1235	/* read: check type and grow scalar as necessary */
		1236	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	1237	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	1238	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		1239
1313	{	1240	{
1314	dREQ;	1241	dREQ;
1315		1242
1316	req->type = ix;	1243	req->type = ix;
1317	req->fh = newSVsv (fh);	1244	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1245	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	1246	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	1247	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	1248	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	1249	req->ptr2 = (char *)svptr + dataoffset;
		1250	req->stroffset = dataoffset;
1324		1251
1325	if (!SvREADONLY (data))	1252	if (!SvREADONLY (data))
1326	{	1253	{
1327	SvREADONLY_on (data);	1254	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	1255	req->flags |= FLAG_SV2_RO_OFF;
1329	}	1256	}
1330		1257
1331	REQ_SEND;	1258	REQ_SEND;
1332	}	1259	}
1333	}	1260	}
1334		1261
1335	void	1262	void
1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1263	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1337	SV * out_fh	1264	ALIAS:
1338	SV * in_fh	1265	aio_readlink = EIO_READLINK
1339	UV in_offset	1266	aio_realpath = EIO_REALPATH
1340	UV length
1341	SV * callback
1342	PROTOTYPE: $$$$;$
1343	PPCODE:	1267	PPCODE:
1344	{	1268	{
		1269	dREQ;
		1270
		1271	req->type = ix;
		1272	req_set_path1 (req, pathname);
		1273
		1274	REQ_SEND;
		1275	}
		1276
		1277	void
		1278	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1279	PPCODE:
		1280	{
		1281	int ifd = s_fileno_croak (in_fh , 0);
		1282	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	1283	dREQ;
1346		1284
1347	req->type = REQ_SENDFILE;	1285	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	1286	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1287	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	1288	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1289	req->int2 = ifd;
1352	req->offset = in_offset;	1290	req->offs = in_offset;
1353	req->length = length;	1291	req->size = length;
1354		1292
1355	REQ_SEND;	1293	REQ_SEND;
1356	}	1294	}
1357		1295
1358	void	1296	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1297	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$
1365	PPCODE:	1298	PPCODE:
1366	{	1299	{
		1300	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	1301	dREQ;
1368		1302
1369	req->type = REQ_READAHEAD;	1303	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	1304	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1305	req->int1 = fd;
1372	req->offset = offset;	1306	req->offs = offset;
1373	req->length = length;	1307	req->size = length;
1374		1308
1375	REQ_SEND;	1309	REQ_SEND;
1376	}	1310	}
1377		1311
1378	void	1312	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	1313	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	1314	ALIAS:
1383	aio_stat = REQ_STAT	1315	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	1316	aio_lstat = EIO_LSTAT
		1317	aio_statvfs = EIO_STATVFS
1385	PPCODE:	1318	PPCODE:
1386	{	1319	{
1387	dREQ;	1320	dREQ;
1388		1321
1389	New (0, req->statdata, 1, Stat_t);	1322	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1390	if (!req->statdata)
1391	{
1392	req_free (req);
1393	croak ("out of memory during aio_req->statdata allocation");
1394	}
1395
1396	if (SvPOK (fh_or_path))
1397	{
1398	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);
1401	}
1402	else
1403	{
1404	req->type = REQ_FSTAT;
1405	req->fh = newSVsv (fh_or_path);
1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}
1408		1323
1409	REQ_SEND;	1324	REQ_SEND;
1410	}	1325	}
1411		1326
		1327	UV
		1328	major (UV dev)
		1329	ALIAS:
		1330	minor = 1
		1331	CODE:
		1332	RETVAL = ix ? major (dev) : minor (dev);
		1333	OUTPUT:
		1334	RETVAL
		1335
		1336	UV
		1337	makedev (UV maj, UV min)
		1338	CODE:
		1339	RETVAL = makedev (maj, min);
		1340	OUTPUT:
		1341	RETVAL
		1342
1412	void	1343	void
		1344	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1345	PPCODE:
		1346	{
		1347	dREQ;
		1348
		1349	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1350	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1351	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1352
		1353	REQ_SEND;
		1354	}
		1355
		1356	void
		1357	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1358	PPCODE:
		1359	{
		1360	dREQ;
		1361
		1362	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1363	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1364
		1365	REQ_SEND;
		1366	}
		1367
		1368	void
		1369	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->int2 = mode;
		1375	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1387	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1388	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->type = EIO_READDIR;
		1400	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1401
		1402	if (flags & EIO_READDIR_DENTS)
		1403	req->int1 |= EIO_READDIR_CUSTOM2;
		1404
		1405	req_set_path1 (req, pathname);
		1406
		1407	REQ_SEND;
		1408	}
		1409
		1410	void
		1411	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1412	PPCODE:
		1413	{
		1414	dREQ;
		1415
		1416	req->type = EIO_MKDIR;
		1417	req->int2 = mode;
		1418	req_set_path1 (req, pathname);
		1419
		1420	REQ_SEND;
		1421	}
		1422
		1423	void
1413	aio_unlink (pathname,callback=&PL_sv_undef)	1424	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	1425	ALIAS:
1417	aio_unlink = REQ_UNLINK	1426	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	1427	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	1428	aio_readdir = EIO_READDIR
1420	PPCODE:	1429	PPCODE:
1421	{	1430	{
1422	dREQ;	1431	dREQ;
1423		1432
1424	req->type = ix;	1433	req->type = ix;
1425	req->data = newSVsv (pathname);	1434	req_set_path1 (req, pathname);
1426	req->dataptr = SvPVbyte_nolen (req->data);	1435
1427
1428	REQ_SEND;	1436	REQ_SEND;
1429	}	1437	}
1430		1438
1431	void	1439	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1440	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:	1441	ALIAS:
1437	aio_link = REQ_LINK	1442	aio_link = EIO_LINK
1438	aio_symlink = REQ_SYMLINK	1443	aio_symlink = EIO_SYMLINK
1439	aio_rename = REQ_RENAME	1444	aio_rename = EIO_RENAME
1440	PPCODE:	1445	PPCODE:
1441	{	1446	{
		1447	eio_wd wd2 = 0;
1442	dREQ;	1448	dREQ;
1443		1449
1444	req->type = ix;	1450	req->type = ix;
1445	req->fh = newSVsv (oldpath);	1451	req_set_path1 (req, oldpath);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	1452	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1447	req->data = newSVsv (newpath);	1453	req->int3 = (long)wd2;
1448	req->dataptr = SvPVbyte_nolen (req->data);
1449		1454
1450	REQ_SEND;	1455	REQ_SEND;
1451	}	1456	}
1452		1457
1453	void	1458	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1459	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:	1460	PPCODE:
1460	{	1461	{
1461	dREQ;	1462	dREQ;
1462		1463
1463	req->type = REQ_MKNOD;	1464	req->type = EIO_MKNOD;
1464	req->data = newSVsv (pathname);
1465	req->dataptr = SvPVbyte_nolen (req->data);
1466	req->mode = (mode_t)mode;	1465	req->int2 = (mode_t)mode;
1467	req->offset = dev;	1466	req->offs = dev;
		1467	req_set_path1 (req, pathname);
1468		1468
1469	REQ_SEND;	1469	REQ_SEND;
1470	}	1470	}
1471		1471
1472	void	1472	void
		1473	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1474	ALIAS:
		1475	aio_mtouch = EIO_MTOUCH
		1476	aio_msync = EIO_MSYNC
		1477	PPCODE:
		1478	{
		1479	STRLEN svlen;
		1480	char *svptr = SvPVbyte (data, svlen);
		1481	UV len = SvUV (length);
		1482
		1483	if (offset < 0)
		1484	offset += svlen;
		1485
		1486	if (offset < 0 || offset > svlen)
		1487	croak ("offset outside of scalar");
		1488
		1489	if (!SvOK (length) || len + offset > svlen)
		1490	len = svlen - offset;
		1491
		1492	{
		1493	dREQ;
		1494
		1495	req->type = ix;
		1496	req->sv2 = SvREFCNT_inc (data);
		1497	req->ptr2 = (char *)svptr + offset;
		1498	req->size = len;
		1499	req->int1 = flags;
		1500
		1501	REQ_SEND;
		1502	}
		1503	}
		1504
		1505	void
		1506	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1507	PPCODE:
		1508	{
		1509	STRLEN svlen;
		1510	char *svptr = SvPVbyte (data, svlen);
		1511	UV len = SvUV (length);
		1512
		1513	if (offset < 0)
		1514	offset += svlen;
		1515
		1516	if (offset < 0 || offset > svlen)
		1517	croak ("offset outside of scalar");
		1518
		1519	if (!SvOK (length) || len + offset > svlen)
		1520	len = svlen - offset;
		1521
		1522	{
		1523	dREQ;
		1524
		1525	req->type = EIO_MLOCK;
		1526	req->sv2 = SvREFCNT_inc (data);
		1527	req->ptr2 = (char *)svptr + offset;
		1528	req->size = len;
		1529
		1530	REQ_SEND;
		1531	}
		1532	}
		1533
		1534	void
		1535	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	dREQ;
		1539
		1540	req->type = EIO_MLOCKALL;
		1541	req->int1 = flags;
		1542
		1543	REQ_SEND;
		1544	}
		1545
		1546	void
1473	aio_busy (delay,callback=&PL_sv_undef)	1547	aio_busy (double delay, SV *callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:	1548	PPCODE:
1477	{	1549	{
1478	dREQ;	1550	dREQ;
1479		1551
1480	req->type = REQ_BUSY;	1552	req->type = EIO_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;	1553	req->nv1 = delay < 0. ? 0. : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483		1554
1484	REQ_SEND;	1555	REQ_SEND;
1485	}	1556	}
1486		1557
1487	void	1558	void
1488	aio_group (callback=&PL_sv_undef)	1559	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$
1491	PPCODE:	1560	PPCODE:
1492	{	1561	{
1493	dREQ;	1562	dREQ;
1494		1563
1495	req->type = REQ_GROUP;	1564	req->type = EIO_GROUP;
		1565
1496	req_send (req);	1566	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1567	XPUSHs (req_sv (req, aio_grp_stash));
1499	}	1568	}
1500		1569
1501	void	1570	void
1502	aio_nop (callback=&PL_sv_undef)	1571	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1572	ALIAS:
		1573	aio_nop = EIO_NOP
		1574	aio_sync = EIO_SYNC
1504	PPCODE:	1575	PPCODE:
1505	{	1576	{
1506	dREQ;	1577	dREQ;
1507		1578
1508	req->type = REQ_NOP;	1579	req->type = ix;
1509		1580
1510	REQ_SEND;	1581	REQ_SEND;
1511	}	1582	}
1512		1583
1513	int	1584	int
1514	aioreq_pri (int pri = 0)	1585	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$
1516	CODE:	1586	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1587	RETVAL = next_pri;
1518	if (items > 0)	1588	if (items > 0)
1519	{	1589	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1590	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1591	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1592	next_pri = pri;
1523	}	1593	}
1524	OUTPUT:	1594	OUTPUT:
1525	RETVAL	1595	RETVAL
1526		1596
1527	void	1597	void
1528	aioreq_nice (int nice = 0)	1598	aioreq_nice (int nice = 0)
1529	CODE:	1599	CODE:
1530	nice = next_pri - nice;	1600	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1601	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1602	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1603	next_pri = nice;
1534		1604
1535	void	1605	void
1536	flush ()	1606	flush ()
		1607	CODE:
		1608	while (eio_nreqs ())
		1609	{
		1610	poll_wait ();
		1611	poll_cb ();
		1612	}
		1613
		1614	int
		1615	poll ()
		1616	CODE:
		1617	poll_wait ();
		1618	RETVAL = poll_cb ();
		1619	OUTPUT:
		1620	RETVAL
		1621
		1622	int
		1623	poll_fileno ()
		1624	CODE:
		1625	RETVAL = s_epipe_fd (&respipe);
		1626	OUTPUT:
		1627	RETVAL
		1628
		1629	int
		1630	poll_cb (...)
1537	PROTOTYPE:	1631	PROTOTYPE:
1538	CODE:	1632	CODE:
1539	while (nreqs)
1540	{
1541	poll_wait ();
1542	poll_cb (0);	1633	RETVAL = poll_cb ();
1543	}
1544
1545	void
1546	poll()
1547	PROTOTYPE:
1548	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();
1552	poll_cb (0);
1553	}
1554
1555	int
1556	poll_fileno()
1557	PROTOTYPE:
1558	CODE:
1559	RETVAL = respipe [0];
1560	OUTPUT:	1634	OUTPUT:
1561	RETVAL	1635	RETVAL
1562		1636
		1637	void
		1638	poll_wait ()
		1639	CODE:
		1640	poll_wait ();
		1641
1563	int	1642	int
1564	poll_cb(...)	1643	nreqs ()
1565	PROTOTYPE:
1566	CODE:	1644	CODE:
1567	RETVAL = poll_cb (0);	1645	RETVAL = eio_nreqs ();
1568	OUTPUT:	1646	OUTPUT:
1569	RETVAL	1647	RETVAL
1570		1648
1571	int	1649	int
1572	poll_some(int max = 0)	1650	nready ()
1573	PROTOTYPE: $
1574	CODE:	1651	CODE:
1575	RETVAL = poll_cb (max);	1652	RETVAL = eio_nready ();
1576	OUTPUT:	1653	OUTPUT:
1577	RETVAL	1654	RETVAL
1578		1655
1579	void	1656	int
1580	poll_wait()	1657	npending ()
1581	PROTOTYPE:
1582	CODE:	1658	CODE:
1583	if (nreqs)	1659	RETVAL = eio_npending ();
1584	poll_wait ();
1585
1586	int
1587	nreqs()
1588	PROTOTYPE:
1589	CODE:
1590	RETVAL = nreqs;
1591	OUTPUT:	1660	OUTPUT:
1592	RETVAL	1661	RETVAL
1593		1662
1594	int	1663	int
1595	nready()	1664	nthreads ()
1596	PROTOTYPE:
1597	CODE:	1665	CODE:
1598	RETVAL = get_nready ();	1666	RETVAL = eio_nthreads ();
1599	OUTPUT:	1667	OUTPUT:
1600	RETVAL	1668	RETVAL
1601		1669
1602	int	1670	int
1603	npending()	1671	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1604	PROTOTYPE:	1672	CODE:
		1673	RETVAL = posix_fadvise (fh, offset, length, advice);
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	IV
		1678	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1679	CODE:
		1680	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1681	OUTPUT:
		1682	RETVAL
		1683
		1684	void
		1685	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1686	PPCODE:
		1687	sv_unmagic (scalar, MMAP_MAGIC);
		1688	{
		1689	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1690	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1691	if (addr == (void *)-1)
		1692	XSRETURN_NO;
		1693
		1694	sv_force_normal (scalar);
		1695
		1696	/* we store the length in mg_obj, as namlen is I32 :/ */
		1697	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1698	->mg_obj = (SV *)length;
		1699
		1700	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1701
		1702	if (!(prot & PROT_WRITE))
		1703	SvREADONLY_on (scalar);
		1704
		1705	if (SvLEN (scalar))
		1706	Safefree (SvPVX (scalar));
		1707
		1708	SvPVX (scalar) = (char *)addr;
		1709	SvCUR_set (scalar, length);
		1710	SvLEN_set (scalar, 0);
		1711	SvPOK_only (scalar);
		1712
		1713	XSRETURN_YES;
		1714	}
		1715
		1716	void
		1717	munmap (SV *scalar)
1605	CODE:	1718	CODE:
1606	RETVAL = get_npending ();	1719	sv_unmagic (scalar, MMAP_MAGIC);
		1720
		1721	int
		1722	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1723	ALIAS:
		1724	mprotect = 1
		1725	CODE:
		1726	{
		1727	STRLEN svlen;
		1728	void *addr = SvPVbyte (scalar, svlen);
		1729	size_t len = SvUV (length);
		1730
		1731	if (offset < 0)
		1732	offset += svlen;
		1733
		1734	if (offset < 0 || offset > svlen)
		1735	croak ("offset outside of scalar");
		1736
		1737	if (!SvOK (length) || len + offset > svlen)
		1738	len = svlen - offset;
		1739
		1740	addr = (void *)(((intptr_t)addr) + offset);
		1741	eio_page_align (&addr, &len);
		1742
		1743	switch (ix)
		1744	{
		1745	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1746	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1747	}
		1748	}
1607	OUTPUT:	1749	OUTPUT:
1608	RETVAL	1750	RETVAL
		1751
		1752	int
		1753	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1754	CODE:
		1755	{
		1756	STRLEN svlen;
		1757	void *addr = SvPVbyte (scalar, svlen);
		1758	size_t len = SvUV (length);
		1759
		1760	if (offset < 0)
		1761	offset += svlen;
		1762
		1763	if (offset < 0 || offset > svlen)
		1764	croak ("offset outside of scalar");
		1765
		1766	if (!SvOK (length) || len + offset > svlen)
		1767	len = svlen - offset;
		1768
		1769	addr = (void *)(((intptr_t)addr) + offset);
		1770	eio_page_align (&addr, &len);
		1771	#if _POSIX_MEMLOCK_RANGE
		1772	RETVAL = munlock (addr, len);
		1773	#else
		1774	RETVAL = ((errno = ENOSYS), -1);
		1775	#endif
		1776	}
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	int
		1781	munlockall ()
		1782	CODE:
		1783	#if _POSIX_MEMLOCK
		1784	munlockall ();
		1785	#else
		1786	RETVAL = -1;
		1787	errno = ENOSYS;
		1788	#endif
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	void _on_next_submit (SV *cb)
		1793	CODE:
		1794	SvREFCNT_dec (on_next_submit);
		1795	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1609		1796
1610	PROTOTYPES: DISABLE	1797	PROTOTYPES: DISABLE
		1798
		1799	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1800
		1801	BOOT:
		1802	{
		1803	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1804	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1805	}
		1806
		1807	void
		1808	DESTROY (SV *self)
		1809	CODE:
		1810	{
		1811	aio_wd wd = SvAIO_WD (self);
		1812	#if HAVE_AT
		1813	{
		1814	SV *callback = &PL_sv_undef;
		1815	dREQ; /* clobbers next_pri :/ */
		1816	next_pri = req->pri; /* restore next_pri */
		1817	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1818	req->type = EIO_WD_CLOSE;
		1819	req->wd = wd;
		1820	REQ_SEND;
		1821	}
		1822	#else
		1823	eio_wd_close_sync (wd);
		1824	#endif
		1825	}
1611		1826
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1827	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1828
1614	void	1829	void
1615	cancel (aio_req_ornot req)	1830	cancel (aio_req_ornot req)
1616	CODE:	1831	CODE:
1617	req_cancel (req);	1832	eio_cancel (req);
1618		1833
1619	void	1834	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1835	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1836	PPCODE:
		1837	{
		1838	if (GIMME_V != G_VOID)
		1839	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1840
		1841	if (items > 1)
		1842	{
		1843	SV *cb_cv =get_cb (callback);
		1844
1622	SvREFCNT_dec (req->callback);	1845	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1846	req->callback = SvREFCNT_inc (cb_cv);
		1847	}
		1848	}
1624		1849
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1850	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1851
1627	void	1852	void
1628	add (aio_req grp, ...)	1853	add (aio_req grp, ...)
1629	PPCODE:	1854	PPCODE:
1630	{	1855	{
1631	int i;	1856	int i;
1632	aio_req req;
1633		1857
1634	if (grp->fd == 2)	1858	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1859	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1860
1637	for (i = 1; i < items; ++i )	1861	for (i = 1; i < items; ++i )
1638	{	1862	{
		1863	aio_req req;
		1864
1639	if (GIMME_V != G_VOID)	1865	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1866	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1867
1642	req = SvAIO_REQ (ST (i));	1868	req = SvAIO_REQ (ST (i));
1643		1869
1644	if (req)	1870	if (req)
1645	{	1871	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	}	1872	}
1658	}	1873	}
1659		1874
1660	void	1875	void
1661	cancel_subs (aio_req_ornot req)	1876	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1885	AV *av;
1671		1886
1672	grp->errorno = errno;	1887	grp->errorno = errno;
1673		1888
1674	av = newAV ();	1889	av = newAV ();
		1890	av_extend (av, items - 1);
1675		1891
1676	for (i = 1; i < items; ++i )	1892	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1893	av_push (av, newSVsv (ST (i)));
1678		1894
1679	SvREFCNT_dec (grp->data);	1895	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1896	grp->sv1 = (SV *)av;
1681	}	1897	}
1682		1898
1683	void	1899	void
1684	errno (aio_req grp, int errorno = errno)	1900	errno (aio_req grp, int errorno = errno)
1685	CODE:	1901	CODE:
1686	grp->errorno = errorno;	1902	grp->errorno = errorno;
1687		1903
1688	void	1904	void
1689	limit (aio_req grp, int limit)	1905	limit (aio_req grp, int limit)
1690	CODE:	1906	CODE:
1691	grp->fd2 = limit;	1907	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1908
1694	void	1909	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1910	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1911	CODE:
1697	{	1912	{
1698	SvREFCNT_dec (grp->fh2);	1913	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1914	grp->sv2 = newSVsv (callback);
		1915	grp->feed = aio_grp_feed;
1700		1916
1701	if (grp->fd2 <= 0)	1917	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1918	grp->int2 = 2;
1703		1919
1704	aio_grp_feed (grp);	1920	eio_grp_limit (grp, grp->int2);
1705	}	1921	}
1706		1922

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