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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.86 by root, Mon Oct 30 23:30:00 2006 UTC vs.
Revision 1.188 by root, Sun Jul 17 04:20:04 2011 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	#define EIO_STRUCT_DIRENT Direntry_t
		36	#undef malloc
		37	#undef free
		38
		39	// perl overrides all those nice libc functions
		40	#undef open
		41	#undef read
		42	#undef write
		43	#undef send
		44	#undef recv
		45	#undef stat
		46	#undef lstat
		47	#undef fstat
		48	#undef truncate
		49	#undef ftruncate
		50	#undef open
		51	#undef link
		52	#undef close
		53	#undef unlink
		54	#undef mkdir
		55	#undef rmdir
		56	#undef rename
		57	#undef lseek
		58	#undef opendir
		59	#undef readdir
		60	#undef closedir
		61	#undef chmod
		62	#undef fchmod
		63	#undef dup
		64	#undef dup2
		65	#undef abort
		66	#undef pipe
		67
		68	#else
		69
40	# include <sys/socket.h>	70	#include <sys/time.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	71	#include <sys/select.h>
		72	#include <unistd.h>
		73	#include <utime.h>
		74	#include <signal.h>
		75
		76	#endif
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
		89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
43	# else	295	# else
44	# error sendfile support requested but not available	296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	297	# endif
46	#endif	298	#endif
47		299	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	300	# 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 WORDACCESS_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDACCESS_UNSAFE 0
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif	301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
79	#endif	304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
80		314
81	/* buffer size for various temporary buffers */	315	#ifndef makedev
82	#define AIO_BUFSIZE 65536	316	# define makedev(maj,min) (((maj) << 8) | (min))
		317	#endif
		318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
83		324
84	#define dBUF \	325	#ifndef PAGESIZE
85	char *aio_buf; \	326	# define PAGESIZE sysconf (_SC_PAGESIZE)
86	LOCK (wrklock); \	327	#endif
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		328
92	enum {	329	enum {
93	REQ_QUIT,	330	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, REQ_READLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	331	};
105		332
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 *callback, *fh;
114	SV *sv1, *sv2;
115	void *ptr1, *ptr2;
116	Stat_t *statdata;
117	off_t offs;
118	size_t size;
119	ssize_t result;
120
121	STRLEN stroffset;
122	int type;
123	int int1, int2;
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	FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */
137	};
138
139	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
140	typedef aio_cb *aio_req_ornot;	334	typedef eio_req *aio_req_ornot;
141		335
142	enum {	336	static SV *on_next_submit;
143	PRI_MIN = -4,	337	static int next_pri = EIO_PRI_DEFAULT;
144	PRI_MAX = 4,	338	static int max_outstanding;
145		339
146	DEFAULT_PRI = 0,	340	static s_epipe respipe;
147	PRI_BIAS = -PRI_MIN,
148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
149	};
150		341
151	#define AIO_TICKS ((1000000 + 1023) >> 10)
152
153	static unsigned int max_poll_time = 0;
154	static unsigned int max_poll_reqs = 0;
155
156	/* calculcate time difference in ~1/AIO_TICKS of a second */
157	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
158	{
159	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
160	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
161	}
162
163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
164
165	static unsigned int started, idle, wanted;
166
167	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
168	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
169	#else
170	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
171	#endif
172
173	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
174	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
175
176	/* worker threads management */
177	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
178
179	typedef struct worker {
180	/* locked by wrklock */
181	struct worker *prev, *next;
182
183	pthread_t tid;
184
185	/* locked by reslock, reqlock or wrklock */
186	aio_req req; /* currently processed request */
187	void *dbuf;
188	DIR *dirp;
189	} worker;
190
191	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
192
193	static void worker_clear (worker *wrk)
194	{
195	if (wrk->dirp)
196	{
197	closedir (wrk->dirp);
198	wrk->dirp = 0;
199	}
200
201	if (wrk->dbuf)
202	{
203	free (wrk->dbuf);
204	wrk->dbuf = 0;
205	}
206	}
207
208	static void worker_free (worker *wrk)
209	{
210	wrk->next->prev = wrk->prev;
211	wrk->prev->next = wrk->next;
212
213	free (wrk);
214	}
215
216	static volatile unsigned int nreqs, nready, npending;
217	static volatile unsigned int max_idle = 4;
218	static volatile unsigned int max_outstanding = 0xffffffff;
219	static int respipe [2];
220
221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
224
225	#if WORDACCESS_UNSAFE
226
227	static unsigned int get_nready ()
228	{
229	unsigned int retval;
230
231	LOCK (reqlock);
232	retval = nready;
233	UNLOCK (reqlock);
234
235	return retval;
236	}
237
238	static unsigned int get_npending ()
239	{
240	unsigned int retval;
241
242	LOCK (reslock);
243	retval = npending;
244	UNLOCK (reslock);
245
246	return retval;
247	}
248
249	static unsigned int get_nthreads ()
250	{
251	unsigned int retval;
252
253	LOCK (wrklock);
254	retval = started;
255	UNLOCK (wrklock);
256
257	return retval;
258	}
259
260	#else
261
262	# define get_nready() nready
263	# define get_npending() npending
264	# define get_nthreads() started
265
266	#endif
267
268	/*
269	* a somewhat faster data structure might be nice, but
270	* with 8 priorities this actually needs <20 insns
271	* per shift, the most expensive operation.
272	*/
273	typedef struct {
274	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
275	int size;
276	} reqq;
277
278	static reqq req_queue;
279	static reqq res_queue;
280
281	int reqq_push (reqq *q, aio_req req)
282	{
283	int pri = req->pri;
284	req->next = 0;
285
286	if (q->qe[pri])
287	{
288	q->qe[pri]->next = req;
289	q->qe[pri] = req;
290	}
291	else
292	q->qe[pri] = q->qs[pri] = req;
293
294	return q->size++;
295	}
296
297	aio_req reqq_shift (reqq *q)
298	{
299	int pri;
300
301	if (!q->size)
302	return 0;
303
304	--q->size;
305
306	for (pri = NUM_PRI; pri--; )
307	{
308	aio_req req = q->qs[pri];
309
310	if (req)
311	{
312	if (!(q->qs[pri] = req->next))
313	q->qe[pri] = 0;
314
315	return req;
316	}
317	}
318
319	abort ();
320	}
321
322	static int poll_cb ();
323	static void req_invoke (aio_req req);
324	static void req_free (aio_req req);	342	static void req_destroy (aio_req req);
325	static void req_cancel (aio_req req);	343	static void req_cancel (aio_req req);
326		344
		345	static void want_poll (void)
		346	{
		347	/* write a dummy byte to the pipe so fh becomes ready */
		348	s_epipe_signal (&respipe);
		349	}
		350
		351	static void done_poll (void)
		352	{
		353	/* read any signals sent by the worker threads */
		354	s_epipe_drain (&respipe);
		355	}
		356
327	/* must be called at most once */	357	/* must be called at most once */
328	static SV *req_sv (aio_req req, const char *klass)	358	static SV *req_sv (aio_req req, HV *stash)
329	{	359	{
330	if (!req->self)	360	if (!req->self)
331	{	361	{
332	req->self = (SV *)newHV ();	362	req->self = (SV *)newHV ();
333	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	363	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
334	}	364	}
335		365
336	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	366	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
337	}	367	}
338		368
339	static aio_req SvAIO_REQ (SV *sv)	369	static aio_req SvAIO_REQ (SV *sv)
340	{	370	{
341	MAGIC *mg;	371	MAGIC *mg;
342		372
343	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	373	if (!SvROK (sv)
		374	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		375	&& SvSTASH (SvRV (sv)) != aio_req_stash
		376	&& !sv_derived_from (sv, "IO::AIO::REQ")))
344	croak ("object of class " AIO_REQ_KLASS " expected");	377	croak ("object of class IO::AIO::REQ expected");
345		378
346	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	379	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
347		380
348	return mg ? (aio_req)mg->mg_ptr : 0;	381	return mg ? (aio_req)mg->mg_ptr : 0;
349	}	382	}
350		383
351	static void aio_grp_feed (aio_req grp)	384	static void aio_grp_feed (aio_req grp)
352	{	385	{
353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	386	if (grp->sv2 && SvOK (grp->sv2))
354	{	387	{
355	int old_len = grp->size;
356
357	if (grp->sv2 && SvOK (grp->sv2))
358	{
359	dSP;	388	dSP;
360		389
361	ENTER;	390	ENTER;
362	SAVETMPS;	391	SAVETMPS;
363	PUSHMARK (SP);	392	PUSHMARK (SP);
364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	393	XPUSHs (req_sv (grp, aio_grp_stash));
365	PUTBACK;	394	PUTBACK;
366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	395	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
367	SPAGAIN;	396	SPAGAIN;
368	FREETMPS;	397	FREETMPS;
369	LEAVE;	398	LEAVE;
370	}
371
372	/* stop if no progress has been made */
373	if (old_len == grp->size)
374	{
375	SvREFCNT_dec (grp->sv2);
376	grp->sv2 = 0;
377	break;
378	}
379	}	399	}
380	}	400	}
381		401
382	static void aio_grp_dec (aio_req grp)	402	static void req_submit (eio_req *req)
383	{	403	{
384	--grp->size;	404	eio_submit (req);
385		405
386	/* call feeder, if applicable */	406	if (expect_false (on_next_submit))
387	aio_grp_feed (grp);
388
389	/* finish, if done */
390	if (!grp->size && grp->int1)
391	{	407	{
392	req_invoke (grp);	408	dSP;
393	req_free (grp);	409	SV *cb = sv_2mortal (on_next_submit);
		410
		411	on_next_submit = 0;
		412
		413	PUSHMARK (SP);
		414	PUTBACK;
		415	call_sv (cb, G_DISCARD | G_EVAL);
394	}	416	}
395	}	417	}
396		418
397	static void req_invoke (aio_req req)	419	static int req_invoke (eio_req *req)
398	{	420	{
399	dSP;
400
401	if (req->flags & FLAG_DATA_RO_OFF)	421	if (req->flags & FLAG_SV2_RO_OFF)
402	SvREADONLY_off (req->sv1);	422	SvREADONLY_off (req->sv2);
403		423
404	if (req->statdata)	424	if (!EIO_CANCELLED (req) && req->callback)
405	{	425	{
406	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	426	dSP;
407	PL_laststatval = req->result;	427	static SV *sv_result_cache; /* caches the result integer SV */
408	PL_statcache = *(req->statdata);	428	SV *sv_result;
409	}
410		429
411	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
412	{
413	ENTER;	430	ENTER;
414	SAVETMPS;	431	SAVETMPS;
415	PUSHMARK (SP);	432	PUSHMARK (SP);
416	EXTEND (SP, 1);	433	EXTEND (SP, 1);
417		434
		435	/* do not recreate the result IV from scratch each time */
		436	if (expect_true (sv_result_cache))
		437	{
		438	sv_result = sv_result_cache; sv_result_cache = 0;
		439	SvIV_set (sv_result, req->result);
		440	SvIOK_only (sv_result);
		441	}
		442	else
		443	{
		444	sv_result = newSViv (req->result);
		445	SvREADONLY_on (sv_result);
		446	}
		447
418	switch (req->type)	448	switch (req->type)
419	{	449	{
420	case REQ_READDIR:	450	case EIO_READDIR:
421	{	451	{
422	SV *rv = &PL_sv_undef;	452	SV *rv = &PL_sv_undef;
423		453
424	if (req->result >= 0)	454	if (req->result >= 0)
425	{	455	{
426	int i;	456	int i;
427	char *buf = req->ptr2;	457	char *names = (char *)req->ptr2;
		458	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
428	AV *av = newAV ();	459	AV *av = newAV ();
429		460
430	av_extend (av, req->result - 1);	461	av_extend (av, req->result - 1);
431		462
432	for (i = 0; i < req->result; ++i)	463	for (i = 0; i < req->result; ++i)
433	{	464	{
434	SV *sv = newSVpv (buf, 0);	465	if (req->int1 & EIO_READDIR_DENTS)
		466	{
		467	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
435		468
		469	if (req->int1 & EIO_READDIR_CUSTOM2)
		470	{
		471	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		472	AV *avent = newAV ();
		473
		474	av_extend (avent, 2);
		475
		476	if (!sv_type [ent->type])
		477	{
		478	sv_type [ent->type] = newSViv (ent->type);
		479	SvREADONLY_on (sv_type [ent->type]);
		480	}
		481
		482	av_store (avent, 0, namesv);
		483	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		484	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		485
		486	av_store (av, i, newRV_noinc ((SV *)avent));
		487	}
		488	else
436	av_store (av, i, sv);	489	av_store (av, i, namesv);
		490
		491	++ent;
		492	}
		493	else
		494	{
		495	SV *name = newSVpv (names, 0);
		496	av_store (av, i, name);
437	buf += SvCUR (sv) + 1;	497	names += SvCUR (name) + 1;
		498	}
438	}	499	}
439		500
440	rv = sv_2mortal (newRV_noinc ((SV *)av));	501	rv = sv_2mortal (newRV_noinc ((SV *)av));
441	}	502	}
442		503
443	PUSHs (rv);	504	PUSHs (rv);
		505
		506	if (req->int1 & EIO_READDIR_CUSTOM1)
		507	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
444	}	508	}
445	break;	509	break;
446		510
447	case REQ_OPEN:	511	case EIO_OPEN:
448	{	512	{
449	/* convert fd to fh */	513	/* convert fd to fh */
450	SV *fh;	514	SV *fh = &PL_sv_undef;
451		515
452	PUSHs (sv_2mortal (newSViv (req->result)));	516	if (req->result >= 0)
453	PUTBACK;	517	{
454	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	518	GV *gv = (GV *)sv_newmortal ();
455	SPAGAIN;	519	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		520	char sym [64];
		521	int symlen;
		522
		523	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		524	gv_init (gv, aio_stash, sym, symlen, 0);
456		525
457	fh = SvREFCNT_inc (POPs);	526	symlen = snprintf (
		527	sym,
		528	sizeof (sym),
		529	"%s&=%d",
		530	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		531	(int)req->result
		532	);
458		533
		534	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		535	fh = (SV *)gv;
		536	}
		537
459	PUSHMARK (SP);	538	PUSHs (fh);
460	XPUSHs (sv_2mortal (fh));
461	}	539	}
462	break;	540	break;
463		541
		542	case EIO_STATVFS:
		543	case EIO_FSTATVFS:
		544	{
		545	SV *rv = &PL_sv_undef;
		546
		547	#ifndef _WIN32
		548	if (req->result >= 0)
		549	{
		550	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		551	HV *hv = newHV ();
		552
		553	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		554
		555	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		556	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		557	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		558	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		559	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		560	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		561	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		562	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		563	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		564	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		565	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		566	}
		567	#endif
		568
		569	PUSHs (rv);
		570	}
		571
		572	break;
		573
464	case REQ_GROUP:	574	case EIO_GROUP:
465	req->int1 = 2; /* mark group as finished */	575	req->int1 = 2; /* mark group as finished */
466		576
467	if (req->sv1)	577	if (req->sv1)
468	{	578	{
469	int i;	579	int i;
…		…
473	for (i = 0; i <= AvFILL (av); ++i)	583	for (i = 0; i <= AvFILL (av); ++i)
474	PUSHs (*av_fetch (av, i, 0));	584	PUSHs (*av_fetch (av, i, 0));
475	}	585	}
476	break;	586	break;
477		587
478	case REQ_NOP:	588	case EIO_NOP:
479	case REQ_BUSY:	589	case EIO_BUSY:
480	break;	590	break;
481		591
482	case REQ_READLINK:	592	case EIO_READLINK:
		593	case EIO_REALPATH:
483	if (req->result > 0)	594	if (req->result > 0)
484	{	595	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
485	SvCUR_set (req->sv1, req->result);
486	*SvEND (req->sv1) = 0;
487	PUSHs (req->sv1);
488	}
489	break;	596	break;
490		597
		598	case EIO_STAT:
		599	case EIO_LSTAT:
		600	case EIO_FSTAT:
		601	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		602	PL_laststatval = req->result;
		603	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		604	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		605	PUSHs (sv_result);
		606	break;
		607
491	case REQ_READ:	608	case EIO_READ:
		609	{
492	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	610	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
493	*SvEND (req->sv1) = 0;	611	*SvEND (req->sv2) = 0;
494	/* fall through */	612	SvPOK_only (req->sv2);
		613	SvSETMAGIC (req->sv2);
		614	PUSHs (sv_result);
		615	}
		616	break;
		617
		618	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		619	if (req->result > 0)
		620	SvIV_set (sv_result, 0);
		621	/* FALLTHROUGH */
		622
495	default:	623	default:
496	PUSHs (sv_2mortal (newSViv (req->result)));	624	PUSHs (sv_result);
497	break;	625	break;
498	}	626	}
499		627
500	errno = req->errorno;	628	errno = req->errorno;
501		629
502	PUTBACK;	630	PUTBACK;
503	call_sv (req->callback, G_VOID | G_EVAL);	631	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
504	SPAGAIN;	632	SPAGAIN;
		633
		634	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		635	SvREFCNT_dec (sv_result);
		636	else
		637	sv_result_cache = sv_result;
505		638
506	FREETMPS;	639	FREETMPS;
507	LEAVE;	640	LEAVE;
		641
		642	PUTBACK;
508	}	643	}
509		644
510	if (req->grp)	645	return !!SvTRUE (ERRSV);
511	{
512	aio_req grp = req->grp;
513
514	/* unlink request */
515	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
516	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
517
518	if (grp->grp_first == req)
519	grp->grp_first = req->grp_next;
520
521	aio_grp_dec (grp);
522	}
523
524	if (SvTRUE (ERRSV))
525	{
526	req_free (req);
527	croak (0);
528	}
529	}	646	}
530		647
531	static void req_free (aio_req req)	648	static void req_destroy (aio_req req)
532	{	649	{
533	if (req->self)	650	if (req->self)
534	{	651	{
535	sv_unmagic (req->self, PERL_MAGIC_ext);	652	sv_unmagic (req->self, PERL_MAGIC_ext);
536	SvREFCNT_dec (req->self);	653	SvREFCNT_dec (req->self);
537	}	654	}
538		655
539	SvREFCNT_dec (req->fh);
540	SvREFCNT_dec (req->sv1);	656	SvREFCNT_dec (req->sv1);
541	SvREFCNT_dec (req->sv2);	657	SvREFCNT_dec (req->sv2);
542	SvREFCNT_dec (req->callback);	658	SvREFCNT_dec (req->callback);
543	Safefree (req->statdata);
544
545	if (req->type == REQ_READDIR)
546	free (req->ptr2);
547		659
548	Safefree (req);	660	Safefree (req);
549	}	661	}
550		662
551	static void req_cancel_subs (aio_req grp)	663	static void req_cancel_subs (aio_req grp)
552	{	664	{
553	aio_req sub;
554
555	if (grp->type != REQ_GROUP)	665	if (grp->type != EIO_GROUP)
556	return;	666	return;
557		667
558	SvREFCNT_dec (grp->sv2);	668	SvREFCNT_dec (grp->sv2);
559	grp->sv2 = 0;	669	grp->sv2 = 0;
560		670
561	for (sub = grp->grp_first; sub; sub = sub->grp_next)	671	eio_grp_cancel (grp);
562	req_cancel (sub);
563	}	672	}
564		673
565	static void req_cancel (aio_req req)	674	static void create_respipe (void)
566	{	675	{
567	req->flags |= FLAG_CANCELLED;	676	if (s_epipe_renew (&respipe))
568		677	croak ("IO::AIO: unable to initialize result pipe");
569	req_cancel_subs (req);
570	}	678	}
571		679
572	static void *aio_proc(void *arg);
573
574	static void start_thread (void)
575	{
576	sigset_t fullsigset, oldsigset;
577	pthread_attr_t attr;
578
579	worker *wrk = calloc (1, sizeof (worker));
580
581	if (!wrk)
582	croak ("unable to allocate worker thread data");
583
584	pthread_attr_init (&attr);
585	pthread_attr_setstacksize (&attr, STACKSIZE);
586	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
587	#ifdef PTHREAD_SCOPE_PROCESS
588	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
589	#endif
590
591	sigfillset (&fullsigset);
592
593	LOCK (wrklock);
594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
595
596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597	{
598	wrk->prev = &wrk_first;
599	wrk->next = wrk_first.next;
600	wrk_first.next->prev = wrk;
601	wrk_first.next = wrk;
602	++started;
603	}
604	else
605	free (wrk);
606
607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
608	UNLOCK (wrklock);
609	}
610
611	static void maybe_start_thread ()
612	{
613	if (get_nthreads () >= wanted)
614	return;
615
616	/* todo: maybe use idle here, but might be less exact */
617	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
618	return;
619
620	start_thread ();
621	}
622
623	static void req_send (aio_req req)
624	{
625	++nreqs;
626
627	LOCK (reqlock);
628	++nready;
629	reqq_push (&req_queue, req);
630	pthread_cond_signal (&reqwait);
631	UNLOCK (reqlock);
632
633	maybe_start_thread ();
634	}
635
636	static void end_thread (void)
637	{
638	aio_req req;
639
640	Newz (0, req, 1, aio_cb);
641
642	req->type = REQ_QUIT;
643	req->pri = PRI_MAX + PRI_BIAS;
644
645	LOCK (reqlock);
646	reqq_push (&req_queue, req);
647	pthread_cond_signal (&reqwait);
648	UNLOCK (reqlock);
649
650	LOCK (wrklock);
651	--started;
652	UNLOCK (wrklock);
653	}
654
655	static void set_max_idle (int nthreads)
656	{
657	if (WORDACCESS_UNSAFE) LOCK (reqlock);
658	max_idle = nthreads <= 0 ? 1 : nthreads;
659	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
660	}
661
662	static void min_parallel (int nthreads)
663	{
664	if (wanted < nthreads)
665	wanted = nthreads;
666	}
667
668	static void max_parallel (int nthreads)
669	{
670	if (wanted > nthreads)
671	wanted = nthreads;
672
673	while (started > wanted)
674	end_thread ();
675	}
676
677	static void poll_wait ()	680	static void poll_wait (void)
678	{	681	{
679	fd_set rfd;
680
681	while (nreqs)	682	while (eio_nreqs ())
682	{	683	{
683	int size;	684	int size;
684	if (WORDACCESS_UNSAFE) LOCK (reslock);	685
		686	X_LOCK (reslock);
685	size = res_queue.size;	687	size = res_queue.size;
686	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	688	X_UNLOCK (reslock);
687		689
688	if (size)	690	if (size)
689	return;	691	return;
690		692
691	maybe_start_thread ();	693	etp_maybe_start_thread ();
692		694
693	FD_ZERO(&rfd);	695	s_epipe_wait (&respipe);
694	FD_SET(respipe [0], &rfd);
695
696	select (respipe [0] + 1, &rfd, 0, 0, 0);
697	}	696	}
698	}	697	}
699		698
700	static int poll_cb ()	699	static int poll_cb (void)
701	{	700	{
702	dSP;
703	int count = 0;
704	int maxreqs = max_poll_reqs;
705	int do_croak = 0;
706	struct timeval tv_start, tv_now;
707	aio_req req;
708
709	if (max_poll_time)
710	gettimeofday (&tv_start, 0);
711
712	for (;;)	701	for (;;)
713	{	702	{
714	for (;;)	703	int res = eio_poll ();
715	{
716	maybe_start_thread ();
717		704
718	LOCK (reslock);	705	if (res > 0)
719	req = reqq_shift (&res_queue);
720
721	if (req)
722	{
723	--npending;
724
725	if (!res_queue.size)
726	{
727	/* read any signals sent by the worker threads */
728	char buf [32];
729	while (read (respipe [0], buf, 32) == 32)
730	;
731	}
732	}
733
734	UNLOCK (reslock);
735
736	if (!req)
737	break;
738
739	--nreqs;
740
741	if (req->type == REQ_GROUP && req->size)
742	{
743	req->int1 = 1; /* mark request as delayed */
744	continue;
745	}
746	else
747	{
748	req_invoke (req);
749
750	count++;
751	}
752
753	req_free (req);
754
755	if (maxreqs && !--maxreqs)
756	break;
757
758	if (max_poll_time)
759	{
760	gettimeofday (&tv_now, 0);
761
762	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
763	break;
764	}
765	}
766
767	if (nreqs <= max_outstanding)
768	break;	706	croak (0);
		707
		708	if (!max_outstanding || max_outstanding > eio_nreqs ())
		709	return res;
769		710
770	poll_wait ();	711	poll_wait ();
771
772	++maxreqs;
773	}	712	}
774
775	return count;
776	}	713	}
777		714
778	static void create_pipe ()	715	static void atfork_child (void)
779	{	716	{
780	if (pipe (respipe))	717	create_respipe ();
781	croak ("unable to initialize result pipe");
782
783	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
784	croak ("cannot set result pipe to nonblocking mode");
785
786	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
787	croak ("cannot set result pipe to nonblocking mode");
788	}	718	}
789		719
790	/*****************************************************************************/	720	/*****************************************************************************/
791	/* work around various missing functions */
792		721
793	#if !HAVE_PREADWRITE	722	#if !_POSIX_MAPPED_FILES
794	# define pread aio_pread	723	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
795	# define pwrite aio_pwrite	724	# define munmap(addr,length) (errno = ENOSYS, -1)
796
797	/*
798	* make our pread/pwrite safe against themselves, but not against
799	* normal read/write by using a mutex. slows down execution a lot,
800	* but that's your problem, not mine.
801	*/
802	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
803
804	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
805	{
806	ssize_t res;
807	off_t ooffset;
808
809	LOCK (preadwritelock);
810	ooffset = lseek (fd, 0, SEEK_CUR);
811	lseek (fd, offset, SEEK_SET);
812	res = read (fd, buf, count);
813	lseek (fd, ooffset, SEEK_SET);
814	UNLOCK (preadwritelock);
815
816	return res;
817	}
818
819	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
820	{
821	ssize_t res;
822	off_t ooffset;
823
824	LOCK (preadwritelock);
825	ooffset = lseek (fd, 0, SEEK_CUR);
826	lseek (fd, offset, SEEK_SET);
827	res = write (fd, buf, count);
828	lseek (fd, offset, SEEK_SET);
829	UNLOCK (preadwritelock);
830
831	return res;
832	}
833	#endif
834
835	#if !HAVE_FDATASYNC
836	# define fdatasync fsync
837	#endif
838
839	#if !HAVE_READAHEAD
840	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
841
842	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
843	{
844	dBUF;
845
846	while (count > 0)
847	{
848	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
849
850	pread (fd, aio_buf, len, offset);
851	offset += len;
852	count -= len;
853	}
854
855	errno = 0;
856	}
857
858	#endif
859
860	#if !HAVE_READDIR_R
861	# define readdir_r aio_readdir_r
862
863	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
864
865	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
866	{
867	struct dirent *e;
868	int errorno;
869
870	LOCK (readdirlock);
871
872	e = readdir (dirp);
873	errorno = errno;
874
875	if (e)
876	{
877	*res = ent;
878	strcpy (ent->d_name, e->d_name);
879	}
880	else
881	*res = 0;
882
883	UNLOCK (readdirlock);
884
885	errno = errorno;
886	return e ? 0 : -1;
887	}
888	#endif
889
890	/* sendfile always needs emulation */
891	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
892	{
893	ssize_t res;
894
895	if (!count)
896	return 0;
897
898	#if HAVE_SENDFILE
899	# if __linux
900	res = sendfile (ofd, ifd, &offset, count);
901
902	# elif __freebsd
903	/*
904	* Of course, the freebsd sendfile is a dire hack with no thoughts
905	* wasted on making it similar to other I/O functions.
906	*/
907	{
908	off_t sbytes;
909	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
910
911	if (res < 0 && sbytes)
912	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
913	res = sbytes;
914	}
915
916	# elif __hpux
917	res = sendfile (ofd, ifd, offset, count, 0, 0);
918
919	# elif __solaris
920	{
921	struct sendfilevec vec;
922	size_t sbytes;
923
924	vec.sfv_fd = ifd;
925	vec.sfv_flag = 0;
926	vec.sfv_off = offset;
927	vec.sfv_len = count;
928
929	res = sendfilev (ofd, &vec, 1, &sbytes);
930
931	if (res < 0 && sbytes)
932	res = sbytes;
933	}
934
935	# endif	725	#endif
936	#else
937	res = -1;
938	errno = ENOSYS;
939	#endif
940		726
941	if (res < 0	727	#if !_POSIX_MEMORY_PROTECTION
942	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	728	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
943	#if __solaris	729	# define PROT_NONE 0
944	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	730	# define PROT_WRITE 0
		731	# define MAP_PRIVATE 0
		732	# define MAP_SHARED 0
		733	# define MAP_FIXED 0
945	#endif	734	#endif
946	)
947	)
948	{
949	/* emulate sendfile. this is a major pain in the ass */
950	dBUF;
951		735
952	res = 0;	736	#define MMAP_MAGIC PERL_MAGIC_ext
953		737
954	while (count)	738	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
955	{	739	{
956	ssize_t cnt;	740	int old_errno = errno;
957		741	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
958	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);	742	errno = old_errno;
959		743
960	if (cnt <= 0)	744	mg->mg_obj = 0; /* just in case */
961	{
962	if (cnt && !res) res = -1;
963	break;
964	}
965		745
966	cnt = write (ofd, aio_buf, cnt);	746	SvREADONLY_off (sv);
967		747
968	if (cnt <= 0)	748	if (SvPVX (sv) != mg->mg_ptr)
969	{	749	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
970	if (cnt && !res) res = -1;
971	break;
972	}
973		750
974	offset += cnt;	751	SvCUR_set (sv, 0);
975	res += cnt;	752	SvPVX (sv) = 0;
976	count -= cnt;	753	SvOK_off (sv);
977	}
978	}
979		754
980	return res;	755	return 0;
981	}	756	}
982		757
983	/* read a full directory */	758	static MGVTBL mmap_vtbl = {
984	static void scandir_ (aio_req req, worker *self)	759	0, 0, 0, 0, mmap_free
985	{	760	};
986	DIR *dirp;
987	union
988	{
989	struct dirent d;
990	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
991	} *u;
992	struct dirent *entp;
993	char *name, *names;
994	int memlen = 4096;
995	int memofs = 0;
996	int res = 0;
997	int errorno;
998
999	LOCK (wrklock);
1000	self->dirp = dirp = opendir (req->ptr1);
1001	self->dbuf = u = malloc (sizeof (*u));
1002	req->ptr2 = names = malloc (memlen);
1003	UNLOCK (wrklock);
1004
1005	if (dirp && u && names)
1006	for (;;)
1007	{
1008	errno = 0;
1009	readdir_r (dirp, &u->d, &entp);
1010
1011	if (!entp)
1012	break;
1013
1014	name = entp->d_name;
1015
1016	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1017	{
1018	int len = strlen (name) + 1;
1019
1020	res++;
1021
1022	while (memofs + len > memlen)
1023	{
1024	memlen *= 2;
1025	LOCK (wrklock);
1026	req->ptr2 = names = realloc (names, memlen);
1027	UNLOCK (wrklock);
1028
1029	if (!names)
1030	break;
1031	}
1032
1033	memcpy (names + memofs, name, len);
1034	memofs += len;
1035	}
1036	}
1037
1038	if (errno)
1039	res = -1;
1040
1041	req->result = res;
1042	}
1043		761
1044	/*****************************************************************************/	762	/*****************************************************************************/
1045		763
1046	static void *aio_proc (void *thr_arg)	764	static SV * get_cb (SV *cb_sv)
1047	{	765	{
1048	aio_req req;	766	SvGETMAGIC (cb_sv);
1049	struct timespec ts;	767	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1050	worker *self = (worker *)thr_arg;
1051
1052	/* try to distribute timeouts somewhat evenly */
1053	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1054	* (1000000000UL / 1024UL);
1055
1056	for (;;)
1057	{
1058	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1059
1060	LOCK (reqlock);
1061
1062	for (;;)
1063	{
1064	self->req = req = reqq_shift (&req_queue);
1065
1066	if (req)
1067	break;
1068
1069	++idle;
1070
1071	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1072	== ETIMEDOUT)
1073	{
1074	if (idle > max_idle)
1075	{
1076	--idle;
1077	UNLOCK (reqlock);
1078	LOCK (wrklock);
1079	--started;
1080	UNLOCK (wrklock);
1081	goto quit;
1082	}
1083
1084	/* we are allowed to idle, so do so without any timeout */
1085	pthread_cond_wait (&reqwait, &reqlock);
1086	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1087	}
1088
1089	--idle;
1090	}
1091
1092	--nready;
1093
1094	UNLOCK (reqlock);
1095
1096	errno = 0; /* strictly unnecessary */
1097
1098	if (!(req->flags & FLAG_CANCELLED))
1099	switch (req->type)
1100	{
1101	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1102	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1103
1104	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1105	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1106
1107	case REQ_STAT: req->result = stat (req->ptr1, req->statdata); break;
1108	case REQ_LSTAT: req->result = lstat (req->ptr1, req->statdata); break;
1109	case REQ_FSTAT: req->result = fstat (req->int1, req->statdata); break;
1110
1111	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1112	case REQ_CLOSE: req->result = close (req->int1); break;
1113	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1114	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1115	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1116	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1117	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1118	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1119	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1120
1121	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1122	case REQ_FSYNC: req->result = fsync (req->int1); break;
1123	case REQ_READDIR: scandir_ (req, self); break;
1124
1125	case REQ_BUSY:
1126	{
1127	struct timeval tv;
1128
1129	tv.tv_sec = req->int1;
1130	tv.tv_usec = req->int2;
1131
1132	req->result = select (0, 0, 0, 0, &tv);
1133	}
1134
1135	case REQ_GROUP:
1136	case REQ_NOP:
1137	break;
1138
1139	case REQ_QUIT:
1140	goto quit;
1141
1142	default:
1143	req->result = ENOSYS;
1144	break;
1145	}
1146
1147	req->errorno = errno;
1148
1149	LOCK (reslock);
1150
1151	++npending;
1152
1153	if (!reqq_push (&res_queue, req))
1154	/* write a dummy byte to the pipe so fh becomes ready */
1155	write (respipe [1], &respipe, 1);
1156
1157	self->req = 0;
1158	worker_clear (self);
1159
1160	UNLOCK (reslock);
1161	}
1162
1163	quit:
1164	LOCK (wrklock);
1165	worker_free (self);
1166	UNLOCK (wrklock);
1167
1168	return 0;
1169	}
1170
1171	/*****************************************************************************/
1172
1173	static void atfork_prepare (void)
1174	{
1175	LOCK (wrklock);
1176	LOCK (reqlock);
1177	LOCK (reslock);
1178	#if !HAVE_PREADWRITE
1179	LOCK (preadwritelock);
1180	#endif
1181	#if !HAVE_READDIR_R
1182	LOCK (readdirlock);
1183	#endif
1184	}
1185
1186	static void atfork_parent (void)
1187	{
1188	#if !HAVE_READDIR_R
1189	UNLOCK (readdirlock);
1190	#endif
1191	#if !HAVE_PREADWRITE
1192	UNLOCK (preadwritelock);
1193	#endif
1194	UNLOCK (reslock);
1195	UNLOCK (reqlock);
1196	UNLOCK (wrklock);
1197	}
1198
1199	static void atfork_child (void)
1200	{
1201	aio_req prv;
1202
1203	while (prv = reqq_shift (&req_queue))
1204	req_free (prv);
1205
1206	while (prv = reqq_shift (&res_queue))
1207	req_free (prv);
1208
1209	while (wrk_first.next != &wrk_first)
1210	{
1211	worker *wrk = wrk_first.next;
1212
1213	if (wrk->req)
1214	req_free (wrk->req);
1215
1216	worker_clear (wrk);
1217	worker_free (wrk);
1218	}
1219
1220	started = 0;
1221	idle = 0;
1222	nreqs = 0;
1223	nready = 0;
1224	npending = 0;
1225
1226	close (respipe [0]);
1227	close (respipe [1]);
1228	create_pipe ();
1229
1230	atfork_parent ();
1231	}	768	}
1232		769
1233	#define dREQ \	770	#define dREQ \
		771	SV *cb_cv; \
1234	aio_req req; \	772	aio_req req; \
1235	int req_pri = next_pri; \	773	int req_pri = next_pri; \
1236	next_pri = DEFAULT_PRI + PRI_BIAS; \	774	next_pri = EIO_PRI_DEFAULT; \
1237	\	775	\
1238	if (SvOK (callback) && !SvROK (callback)) \	776	cb_cv = get_cb (callback); \
1239	croak ("callback must be undef or of reference type"); \
1240	\	777	\
1241	Newz (0, req, 1, aio_cb); \	778	Newz (0, req, 1, eio_req); \
1242	if (!req) \	779	if (!req) \
1243	croak ("out of memory during aio_req allocation"); \	780	croak ("out of memory during eio_req allocation"); \
1244	\	781	\
1245	req->callback = newSVsv (callback); \	782	req->callback = SvREFCNT_inc (cb_cv); \
1246	req->pri = req_pri	783	req->pri = req_pri
1247		784
1248	#define REQ_SEND \	785	#define REQ_SEND \
		786	PUTBACK; \
1249	req_send (req); \	787	req_submit (req); \
		788	SPAGAIN; \
1250	\	789	\
1251	if (GIMME_V != G_VOID) \	790	if (GIMME_V != G_VOID) \
1252	XPUSHs (req_sv (req, AIO_REQ_KLASS));	791	XPUSHs (req_sv (req, aio_req_stash));
1253		792
1254	MODULE = IO::AIO PACKAGE = IO::AIO	793	MODULE = IO::AIO PACKAGE = IO::AIO
1255		794
1256	PROTOTYPES: ENABLE	795	PROTOTYPES: ENABLE
1257		796
1258	BOOT:	797	BOOT:
1259	{	798	{
		799	static const struct {
		800	const char *name;
		801	IV iv;
		802	} *civ, const_iv[] = {
		803	# define const_niv(name, value) { # name, (IV) value },
		804	# define const_iv(name) { # name, (IV) name },
		805	# define const_eio(name) { # name, (IV) EIO_ ## name },
		806	const_iv (EXDEV)
		807	const_iv (ENOSYS)
		808	const_iv (O_RDONLY)
		809	const_iv (O_WRONLY)
		810	const_iv (O_RDWR)
		811	const_iv (O_CREAT)
		812	const_iv (O_TRUNC)
		813	const_iv (O_EXCL)
		814	const_iv (O_APPEND)
		815
		816	const_iv (O_ASYNC)
		817	const_iv (O_DIRECT)
		818	const_iv (O_NOATIME)
		819
		820	const_iv (O_CLOEXEC)
		821	const_iv (O_NOCTTY)
		822	const_iv (O_NOFOLLOW)
		823	const_iv (O_NONBLOCK)
		824	const_iv (O_EXEC)
		825	const_iv (O_SEARCH)
		826	const_iv (O_DIRECTORY)
		827	const_iv (O_DSYNC)
		828	const_iv (O_RSYNC)
		829	const_iv (O_SYNC)
		830	const_iv (O_TTY_INIT)
		831
		832	const_iv (S_IFIFO)
		833	const_iv (S_IFCHR)
		834	const_iv (S_IFBLK)
		835	const_iv (S_IFLNK)
		836	const_iv (S_IFREG)
		837	const_iv (S_IFDIR)
		838	const_iv (S_IFWHT)
		839	const_iv (S_IFSOCK)
		840	const_iv (S_IFMT)
		841
		842	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		843	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		844	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		845	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		846	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		847	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		848
		849	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		850	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		851	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		852	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		853	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		854
		855	const_iv (ST_RDONLY)
		856	const_iv (ST_NOSUID)
		857	const_iv (ST_NODEV)
		858	const_iv (ST_NOEXEC)
		859	const_iv (ST_SYNCHRONOUS)
		860	const_iv (ST_MANDLOCK)
		861	const_iv (ST_WRITE)
		862	const_iv (ST_APPEND)
		863	const_iv (ST_IMMUTABLE)
		864	const_iv (ST_NOATIME)
		865	const_iv (ST_NODIRATIME)
		866	const_iv (ST_RELATIME)
		867
		868	const_iv (PROT_NONE)
		869	const_iv (PROT_EXEC)
		870	const_iv (PROT_READ)
		871	const_iv (PROT_WRITE)
		872
		873	/*const_iv (MAP_FIXED)*/
		874	const_iv (MAP_PRIVATE)
		875	const_iv (MAP_SHARED)
		876	const_iv (MAP_ANONYMOUS)
		877
		878	/* linuxish */
		879	const_iv (MAP_HUGETLB)
		880	const_iv (MAP_LOCKED)
		881	const_iv (MAP_NORESERVE)
		882	const_iv (MAP_POPULATE)
		883	const_iv (MAP_NONBLOCK)
		884
		885	const_eio (MCL_FUTURE)
		886	const_eio (MCL_CURRENT)
		887
		888	const_eio (MS_ASYNC)
		889	const_eio (MS_INVALIDATE)
		890	const_eio (MS_SYNC)
		891
		892	const_eio (MT_MODIFY)
		893
		894	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		895	const_eio (SYNC_FILE_RANGE_WRITE)
		896	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		897
		898	const_eio (FALLOC_FL_KEEP_SIZE)
		899
		900	const_eio (READDIR_DENTS)
		901	const_eio (READDIR_DIRS_FIRST)
		902	const_eio (READDIR_STAT_ORDER)
		903	const_eio (READDIR_FOUND_UNKNOWN)
		904
		905	const_eio (DT_UNKNOWN)
		906	const_eio (DT_FIFO)
		907	const_eio (DT_CHR)
		908	const_eio (DT_DIR)
		909	const_eio (DT_BLK)
		910	const_eio (DT_REG)
		911	const_eio (DT_LNK)
		912	const_eio (DT_SOCK)
		913	const_eio (DT_WHT)
		914	};
		915
1260	HV *stash = gv_stashpv ("IO::AIO", 1);	916	aio_stash = gv_stashpv ("IO::AIO" , 1);
		917	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		918	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1261		919
1262	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	920	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1263	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	921	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1264	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1265	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1266	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1267	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1268		922
		923	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		924
1269	create_pipe ();	925	create_respipe ();
1270	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1271	}
1272		926
		927	if (eio_init (want_poll, done_poll) < 0)
		928	croak ("IO::AIO: unable to initialise eio library");
		929
		930	/* atfork child called in fifo order, so before eio's handler */
		931	X_THREAD_ATFORK (0, 0, atfork_child);
		932	}
		933
1273	void	934	void
1274	max_poll_reqs (int nreqs)	935	max_poll_reqs (unsigned int nreqs)
1275	PROTOTYPE: $	936	PROTOTYPE: $
1276	CODE:	937	CODE:
1277	max_poll_reqs = nreqs;	938	eio_set_max_poll_reqs (nreqs);
1278		939
1279	void	940	void
1280	max_poll_time (double nseconds)	941	max_poll_time (double nseconds)
1281	PROTOTYPE: $	942	PROTOTYPE: $
1282	CODE:	943	CODE:
1283	max_poll_time = nseconds * AIO_TICKS;	944	eio_set_max_poll_time (nseconds);
1284		945
1285	void	946	void
1286	min_parallel (int nthreads)	947	min_parallel (unsigned int nthreads)
1287	PROTOTYPE: $
1288
1289	void
1290	max_parallel (int nthreads)
1291	PROTOTYPE: $
1292
1293	void
1294	max_idle (int nthreads)
1295	PROTOTYPE: $	948	PROTOTYPE: $
1296	CODE:	949	CODE:
1297	set_max_idle (nthreads);	950	eio_set_min_parallel (nthreads);
1298		951
1299	int	952	void
1300	max_outstanding (int maxreqs)	953	max_parallel (unsigned int nthreads)
1301	PROTOTYPE: $	954	PROTOTYPE: $
1302	CODE:	955	CODE:
1303	RETVAL = max_outstanding;	956	eio_set_max_parallel (nthreads);
		957
		958	void
		959	max_idle (unsigned int nthreads)
		960	PROTOTYPE: $
		961	CODE:
		962	eio_set_max_idle (nthreads);
		963
		964	void
		965	idle_timeout (unsigned int seconds)
		966	PROTOTYPE: $
		967	CODE:
		968	eio_set_idle_timeout (seconds);
		969
		970	void
		971	max_outstanding (unsigned int maxreqs)
		972	PROTOTYPE: $
		973	CODE:
1304	max_outstanding = maxreqs;	974	max_outstanding = maxreqs;
1305	OUTPUT:
1306	RETVAL
1307		975
1308	void	976	void
1309	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	977	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1310	SV * pathname
1311	int flags
1312	int mode
1313	SV * callback
1314	PROTOTYPE: $$$;$
1315	PPCODE:	978	PPCODE:
1316	{	979	{
1317	dREQ;	980	dREQ;
1318		981
1319	req->type = REQ_OPEN;	982	req->type = EIO_OPEN;
1320	req->sv1 = newSVsv (pathname);	983	req->sv1 = newSVsv (pathname);
1321	req->ptr1 = SvPVbyte_nolen (pathname);	984	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	req->int1 = flags;	985	req->int1 = flags;
1323	req->mode = mode;	986	req->int2 = mode;
1324		987
1325	REQ_SEND;	988	REQ_SEND;
1326	}	989	}
1327		990
1328	void	991	void
1329	aio_close (fh,callback=&PL_sv_undef)	992	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1330	SV * fh
1331	SV * callback
1332	PROTOTYPE: $;$
1333	ALIAS:	993	ALIAS:
1334	aio_close = REQ_CLOSE
1335	aio_fsync = REQ_FSYNC	994	aio_fsync = EIO_FSYNC
1336	aio_fdatasync = REQ_FDATASYNC	995	aio_fdatasync = EIO_FDATASYNC
1337	PPCODE:	996	PPCODE:
1338	{	997	{
		998	int fd = s_fileno_croak (fh, 0);
1339	dREQ;	999	dREQ;
1340		1000
1341	req->type = ix;	1001	req->type = ix;
1342	req->fh = newSVsv (fh);	1002	req->sv1 = newSVsv (fh);
1343	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1003	req->int1 = fd;
1344		1004
1345	REQ_SEND (req);	1005	REQ_SEND (req);
1346	}	1006	}
1347		1007
1348	void	1008	void
		1009	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1010	PPCODE:
		1011	{
		1012	int fd = s_fileno_croak (fh, 0);
		1013	dREQ;
		1014
		1015	req->type = EIO_SYNC_FILE_RANGE;
		1016	req->sv1 = newSVsv (fh);
		1017	req->int1 = fd;
		1018	req->offs = offset;
		1019	req->size = nbytes;
		1020	req->int2 = flags;
		1021
		1022	REQ_SEND (req);
		1023	}
		1024
		1025	void
		1026	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1027	PPCODE:
		1028	{
		1029	int fd = s_fileno_croak (fh, 0);
		1030	dREQ;
		1031
		1032	req->type = EIO_FALLOCATE;
		1033	req->sv1 = newSVsv (fh);
		1034	req->int1 = fd;
		1035	req->int2 = mode;
		1036	req->offs = offset;
		1037	req->size = len;
		1038
		1039	REQ_SEND (req);
		1040	}
		1041
		1042	void
		1043	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1044	PPCODE:
		1045	{
		1046	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1047	int fd = s_fileno_croak (fh, 0);
		1048	dREQ;
		1049
		1050	if (expect_false (close_fd < 0))
		1051	{
		1052	int pipefd [2];
		1053
		1054	if (
		1055	#ifdef _WIN32
		1056	_pipe (pipefd, 1, _O_BINARY) < 0
		1057	#else
		1058	pipe (pipefd) < 0
		1059	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1060	#endif
		1061	|| close (pipefd [1]) < 0
		1062	)
		1063	abort (); /*D*/
		1064
		1065	close_fd = pipefd [0];
		1066	}
		1067
		1068	req->type = EIO_DUP2;
		1069	req->int1 = close_fd;
		1070	req->sv2 = newSVsv (fh);
		1071	req->int2 = fd;
		1072
		1073	REQ_SEND (req);
		1074	}
		1075
		1076	void
1349	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1077	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1350	SV * fh
1351	UV offset
1352	UV length
1353	SV * data
1354	UV dataoffset
1355	SV * callback
1356	ALIAS:	1078	ALIAS:
1357	aio_read = REQ_READ	1079	aio_read = EIO_READ
1358	aio_write = REQ_WRITE	1080	aio_write = EIO_WRITE
1359	PROTOTYPE: $$$$$;$
1360	PPCODE:	1081	PPCODE:
1361	{	1082	{
1362	STRLEN svlen;	1083	STRLEN svlen;
		1084	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1363	char *svptr = SvPVbyte (data, svlen);	1085	char *svptr = SvPVbyte (data, svlen);
1364		1086	UV len = SvUV (length);
1365	SvUPGRADE (data, SVt_PV);
1366	SvPOK_on (data);
1367		1087
1368	if (dataoffset < 0)	1088	if (dataoffset < 0)
1369	dataoffset += svlen;	1089	dataoffset += svlen;
1370		1090
1371	if (dataoffset < 0 || dataoffset > svlen)	1091	if (dataoffset < 0 || dataoffset > svlen)
1372	croak ("data offset outside of string");	1092	croak ("dataoffset outside of data scalar");
1373		1093
1374	if (ix == REQ_WRITE)	1094	if (ix == EIO_WRITE)
1375	{	1095	{
1376	/* write: check length and adjust. */	1096	/* write: check length and adjust. */
1377	if (length < 0 || length + dataoffset > svlen)	1097	if (!SvOK (length) || len + dataoffset > svlen)
1378	length = svlen - dataoffset;	1098	len = svlen - dataoffset;
1379	}	1099	}
1380	else	1100	else
1381	{	1101	{
1382	/* read: grow scalar as necessary */	1102	/* read: check type and grow scalar as necessary */
		1103	SvUPGRADE (data, SVt_PV);
1383	svptr = SvGROW (data, length + dataoffset);	1104	svptr = SvGROW (data, len + dataoffset + 1);
1384	}	1105	}
1385
1386	if (length < 0)
1387	croak ("length must not be negative");
1388		1106
1389	{	1107	{
1390	dREQ;	1108	dREQ;
1391		1109
1392	req->type = ix;	1110	req->type = ix;
1393	req->fh = newSVsv (fh);	1111	req->sv1 = newSVsv (fh);
1394	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1112	req->int1 = fd;
1395	: IoOFP (sv_2io (fh)));	1113	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1396	req->offs = offset;
1397	req->size = length;	1114	req->size = len;
1398	req->sv1 = SvREFCNT_inc (data);	1115	req->sv2 = SvREFCNT_inc (data);
1399	req->ptr1 = (char *)svptr + dataoffset;	1116	req->ptr2 = (char *)svptr + dataoffset;
1400	req->stroffset = dataoffset;	1117	req->stroffset = dataoffset;
1401		1118
1402	if (!SvREADONLY (data))	1119	if (!SvREADONLY (data))
1403	{	1120	{
1404	SvREADONLY_on (data);	1121	SvREADONLY_on (data);
1405	req->flags |= FLAG_DATA_RO_OFF;	1122	req->flags |= FLAG_SV2_RO_OFF;
1406	}	1123	}
1407		1124
1408	REQ_SEND;	1125	REQ_SEND;
1409	}	1126	}
1410	}	1127	}
1411		1128
1412	void	1129	void
1413	aio_readlink (path,callback=&PL_sv_undef)	1130	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1414	SV * path	1131	ALIAS:
1415	SV * callback	1132	aio_readlink = EIO_READLINK
1416	PROTOTYPE: $$;$	1133	aio_realpath = EIO_REALPATH
1417	PPCODE:	1134	PPCODE:
1418	{	1135	{
1419	SV *data;
1420	dREQ;	1136	dREQ;
1421		1137
1422	data = newSV (NAME_MAX);
1423	SvPOK_on (data);
1424
1425	req->type = REQ_READLINK;	1138	req->type = ix;
1426	req->fh = newSVsv (path);	1139	req->sv1 = newSVsv (path);
1427	req->ptr2 = SvPVbyte_nolen (path);
1428	req->sv1 = data;
1429	req->ptr1 = SvPVbyte_nolen (data);	1140	req->ptr1 = SvPVbyte_nolen (req->sv1);
1430		1141
1431	REQ_SEND;	1142	REQ_SEND;
1432	}	1143	}
1433		1144
1434	void	1145	void
1435	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1146	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1436	SV * out_fh
1437	SV * in_fh
1438	UV in_offset
1439	UV length
1440	SV * callback
1441	PROTOTYPE: $$$$;$
1442	PPCODE:	1147	PPCODE:
1443	{	1148	{
		1149	int ifd = s_fileno_croak (in_fh , 0);
		1150	int ofd = s_fileno_croak (out_fh, 1);
1444	dREQ;	1151	dREQ;
1445		1152
1446	req->type = REQ_SENDFILE;	1153	req->type = EIO_SENDFILE;
1447	req->fh = newSVsv (out_fh);	1154	req->sv1 = newSVsv (out_fh);
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1155	req->int1 = ofd;
1449	req->sv2 = newSVsv (in_fh);	1156	req->sv2 = newSVsv (in_fh);
1450	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1157	req->int2 = ifd;
1451	req->offs = in_offset;	1158	req->offs = in_offset;
1452	req->size = length;	1159	req->size = length;
1453		1160
1454	REQ_SEND;	1161	REQ_SEND;
1455	}	1162	}
1456		1163
1457	void	1164	void
1458	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1165	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1459	SV * fh
1460	UV offset
1461	IV length
1462	SV * callback
1463	PROTOTYPE: $$$;$
1464	PPCODE:	1166	PPCODE:
1465	{	1167	{
		1168	int fd = s_fileno_croak (fh, 0);
1466	dREQ;	1169	dREQ;
1467		1170
1468	req->type = REQ_READAHEAD;	1171	req->type = EIO_READAHEAD;
1469	req->fh = newSVsv (fh);	1172	req->sv1 = newSVsv (fh);
1470	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1173	req->int1 = fd;
1471	req->offs = offset;	1174	req->offs = offset;
1472	req->size = length;	1175	req->size = length;
1473		1176
1474	REQ_SEND;	1177	REQ_SEND;
1475	}	1178	}
1476		1179
1477	void	1180	void
1478	aio_stat (fh_or_path,callback=&PL_sv_undef)	1181	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1479	SV * fh_or_path
1480	SV * callback
1481	ALIAS:	1182	ALIAS:
1482	aio_stat = REQ_STAT	1183	aio_stat = EIO_STAT
1483	aio_lstat = REQ_LSTAT	1184	aio_lstat = EIO_LSTAT
		1185	aio_statvfs = EIO_STATVFS
1484	PPCODE:	1186	PPCODE:
1485	{	1187	{
1486	dREQ;	1188	dREQ;
1487		1189
1488	New (0, req->statdata, 1, Stat_t);	1190	req->sv1 = newSVsv (fh_or_path);
1489	if (!req->statdata)
1490	{
1491	req_free (req);
1492	croak ("out of memory during aio_req->statdata allocation");
1493	}
1494		1191
1495	if (SvPOK (fh_or_path))	1192	if (SvPOK (req->sv1))
1496	{	1193	{
1497	req->type = ix;	1194	req->type = ix;
1498	req->sv1 = newSVsv (fh_or_path);
1499	req->ptr1 = SvPVbyte_nolen (fh_or_path);	1195	req->ptr1 = SvPVbyte_nolen (req->sv1);
1500	}	1196	}
1501	else	1197	else
1502	{	1198	{
1503	req->type = REQ_FSTAT;	1199	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1504	req->fh = newSVsv (fh_or_path);
1505	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1200	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1506	}	1201	}
1507		1202
1508	REQ_SEND;	1203	REQ_SEND;
1509	}	1204	}
1510		1205
		1206	UV
		1207	major (UV dev)
		1208	ALIAS:
		1209	minor = 1
		1210	CODE:
		1211	RETVAL = ix ? major (dev) : minor (dev);
		1212	OUTPUT:
		1213	RETVAL
		1214
		1215	UV
		1216	makedev (UV maj, UV min)
		1217	CODE:
		1218	RETVAL = makedev (maj, min);
		1219	OUTPUT:
		1220	RETVAL
		1221
1511	void	1222	void
		1223	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1224	PPCODE:
		1225	{
		1226	dREQ;
		1227
		1228	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1229	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1230	req->sv1 = newSVsv (fh_or_path);
		1231
		1232	if (SvPOK (req->sv1))
		1233	{
		1234	req->type = EIO_UTIME;
		1235	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1236	}
		1237	else
		1238	{
		1239	req->type = EIO_FUTIME;
		1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1241	}
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	void
		1247	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1248	PPCODE:
		1249	{
		1250	dREQ;
		1251
		1252	req->sv1 = newSVsv (fh_or_path);
		1253	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1254
		1255	if (SvPOK (req->sv1))
		1256	{
		1257	req->type = EIO_TRUNCATE;
		1258	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1259	}
		1260	else
		1261	{
		1262	req->type = EIO_FTRUNCATE;
		1263	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1264	}
		1265
		1266	REQ_SEND;
		1267	}
		1268
		1269	void
		1270	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1271	ALIAS:
		1272	aio_chmod = EIO_CHMOD
		1273	aio_mkdir = EIO_MKDIR
		1274	PPCODE:
		1275	{
		1276	dREQ;
		1277
		1278	req->int2 = mode;
		1279	req->sv1 = newSVsv (fh_or_path);
		1280
		1281	if (SvPOK (req->sv1))
		1282	{
		1283	req->type = ix;
		1284	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1285	}
		1286	else
		1287	{
		1288	req->type = EIO_FCHMOD;
		1289	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1290	}
		1291
		1292	REQ_SEND;
		1293	}
		1294
		1295	void
		1296	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1297	PPCODE:
		1298	{
		1299	dREQ;
		1300
		1301	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1302	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1303	req->sv1 = newSVsv (fh_or_path);
		1304
		1305	if (SvPOK (req->sv1))
		1306	{
		1307	req->type = EIO_CHOWN;
		1308	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1309	}
		1310	else
		1311	{
		1312	req->type = EIO_FCHOWN;
		1313	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1314	}
		1315
		1316	REQ_SEND;
		1317	}
		1318
		1319	void
		1320	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1321	PPCODE:
		1322	{
		1323	dREQ;
		1324
		1325	req->type = EIO_READDIR;
		1326	req->sv1 = newSVsv (pathname);
		1327	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1328	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1329
		1330	if (flags & EIO_READDIR_DENTS)
		1331	req->int1 |= EIO_READDIR_CUSTOM2;
		1332
		1333	REQ_SEND;
		1334	}
		1335
		1336	void
1512	aio_unlink (pathname,callback=&PL_sv_undef)	1337	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1513	SV * pathname
1514	SV * callback
1515	ALIAS:	1338	ALIAS:
1516	aio_unlink = REQ_UNLINK	1339	aio_unlink = EIO_UNLINK
1517	aio_rmdir = REQ_RMDIR	1340	aio_rmdir = EIO_RMDIR
1518	aio_readdir = REQ_READDIR	1341	aio_readdir = EIO_READDIR
1519	PPCODE:	1342	PPCODE:
1520	{	1343	{
1521	dREQ;	1344	dREQ;
1522		1345
1523	req->type = ix;	1346	req->type = ix;
1524	req->sv1 = newSVsv (pathname);	1347	req->sv1 = newSVsv (pathname);
1525	req->ptr1 = SvPVbyte_nolen (pathname);	1348	req->ptr1 = SvPVbyte_nolen (req->sv1);
1526		1349
1527	REQ_SEND;	1350	REQ_SEND;
1528	}	1351	}
1529		1352
1530	void	1353	void
1531	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1354	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1532	SV * oldpath
1533	SV * newpath
1534	SV * callback
1535	ALIAS:	1355	ALIAS:
1536	aio_link = REQ_LINK	1356	aio_link = EIO_LINK
1537	aio_symlink = REQ_SYMLINK	1357	aio_symlink = EIO_SYMLINK
1538	aio_rename = REQ_RENAME	1358	aio_rename = EIO_RENAME
1539	PPCODE:	1359	PPCODE:
1540	{	1360	{
1541	dREQ;	1361	dREQ;
1542		1362
1543	req->type = ix;	1363	req->type = ix;
1544	req->fh = newSVsv (oldpath);	1364	req->sv1 = newSVsv (oldpath);
1545	req->ptr2 = SvPVbyte_nolen (req->fh);	1365	req->ptr1 = SvPVbyte_nolen (req->sv1);
1546	req->sv1 = newSVsv (newpath);	1366	req->sv2 = newSVsv (newpath);
1547	req->ptr1 = SvPVbyte_nolen (newpath);	1367	req->ptr2 = SvPVbyte_nolen (req->sv2);
1548		1368
1549	REQ_SEND;	1369	REQ_SEND;
1550	}	1370	}
1551		1371
1552	void	1372	void
1553	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1373	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1554	SV * pathname
1555	SV * callback
1556	UV mode
1557	UV dev
1558	PPCODE:	1374	PPCODE:
1559	{	1375	{
1560	dREQ;	1376	dREQ;
1561		1377
1562	req->type = REQ_MKNOD;	1378	req->type = EIO_MKNOD;
1563	req->sv1 = newSVsv (pathname);	1379	req->sv1 = newSVsv (pathname);
1564	req->ptr1 = SvPVbyte_nolen (pathname);	1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
1565	req->mode = (mode_t)mode;	1381	req->int2 = (mode_t)mode;
1566	req->offs = dev;	1382	req->offs = dev;
1567		1383
1568	REQ_SEND;	1384	REQ_SEND;
1569	}	1385	}
1570		1386
1571	void	1387	void
		1388	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1389	ALIAS:
		1390	aio_mtouch = EIO_MTOUCH
		1391	aio_msync = EIO_MSYNC
		1392	PPCODE:
		1393	{
		1394	STRLEN svlen;
		1395	char *svptr = SvPVbyte (data, svlen);
		1396	UV len = SvUV (length);
		1397
		1398	if (offset < 0)
		1399	offset += svlen;
		1400
		1401	if (offset < 0 || offset > svlen)
		1402	croak ("offset outside of scalar");
		1403
		1404	if (!SvOK (length) || len + offset > svlen)
		1405	len = svlen - offset;
		1406
		1407	{
		1408	dREQ;
		1409
		1410	req->type = ix;
		1411	req->sv2 = SvREFCNT_inc (data);
		1412	req->ptr2 = (char *)svptr + offset;
		1413	req->size = len;
		1414	req->int1 = flags;
		1415
		1416	REQ_SEND;
		1417	}
		1418	}
		1419
		1420	void
		1421	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1422	PPCODE:
		1423	{
		1424	STRLEN svlen;
		1425	char *svptr = SvPVbyte (data, svlen);
		1426	UV len = SvUV (length);
		1427
		1428	if (offset < 0)
		1429	offset += svlen;
		1430
		1431	if (offset < 0 || offset > svlen)
		1432	croak ("offset outside of scalar");
		1433
		1434	if (!SvOK (length) || len + offset > svlen)
		1435	len = svlen - offset;
		1436
		1437	{
		1438	dREQ;
		1439
		1440	req->type = EIO_MLOCK;
		1441	req->sv2 = SvREFCNT_inc (data);
		1442	req->ptr2 = (char *)svptr + offset;
		1443	req->size = len;
		1444
		1445	REQ_SEND;
		1446	}
		1447	}
		1448
		1449	void
		1450	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1451	PPCODE:
		1452	{
		1453	dREQ;
		1454
		1455	req->type = EIO_MLOCKALL;
		1456	req->int1 = flags;
		1457
		1458	REQ_SEND;
		1459	}
		1460
		1461	void
1572	aio_busy (delay,callback=&PL_sv_undef)	1462	aio_busy (double delay, SV *callback=&PL_sv_undef)
1573	double delay
1574	SV * callback
1575	PPCODE:	1463	PPCODE:
1576	{	1464	{
1577	dREQ;	1465	dREQ;
1578		1466
1579	req->type = REQ_BUSY;	1467	req->type = EIO_BUSY;
1580	req->int1 = delay < 0. ? 0 : delay;	1468	req->nv1 = delay < 0. ? 0. : delay;
1581	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1582		1469
1583	REQ_SEND;	1470	REQ_SEND;
1584	}	1471	}
1585		1472
1586	void	1473	void
1587	aio_group (callback=&PL_sv_undef)	1474	aio_group (SV *callback=&PL_sv_undef)
1588	SV * callback
1589	PROTOTYPE: ;$
1590	PPCODE:	1475	PPCODE:
1591	{	1476	{
1592	dREQ;	1477	dREQ;
1593		1478
1594	req->type = REQ_GROUP;	1479	req->type = EIO_GROUP;
1595		1480
1596	req_send (req);	1481	req_submit (req);
1597	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1482	XPUSHs (req_sv (req, aio_grp_stash));
1598	}	1483	}
1599		1484
1600	void	1485	void
1601	aio_nop (callback=&PL_sv_undef)	1486	aio_nop (SV *callback=&PL_sv_undef)
1602	SV * callback	1487	ALIAS:
		1488	aio_nop = EIO_NOP
		1489	aio_sync = EIO_SYNC
1603	PPCODE:	1490	PPCODE:
1604	{	1491	{
1605	dREQ;	1492	dREQ;
1606		1493
1607	req->type = REQ_NOP;	1494	req->type = ix;
1608		1495
1609	REQ_SEND;	1496	REQ_SEND;
1610	}	1497	}
1611		1498
1612	int	1499	int
1613	aioreq_pri (int pri = 0)	1500	aioreq_pri (int pri = 0)
1614	PROTOTYPE: ;$
1615	CODE:	1501	CODE:
1616	RETVAL = next_pri - PRI_BIAS;	1502	RETVAL = next_pri;
1617	if (items > 0)	1503	if (items > 0)
1618	{	1504	{
1619	if (pri < PRI_MIN) pri = PRI_MIN;	1505	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1620	if (pri > PRI_MAX) pri = PRI_MAX;	1506	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1621	next_pri = pri + PRI_BIAS;	1507	next_pri = pri;
1622	}	1508	}
1623	OUTPUT:	1509	OUTPUT:
1624	RETVAL	1510	RETVAL
1625		1511
1626	void	1512	void
1627	aioreq_nice (int nice = 0)	1513	aioreq_nice (int nice = 0)
1628	CODE:	1514	CODE:
1629	nice = next_pri - nice;	1515	nice = next_pri - nice;
1630	if (nice < PRI_MIN) nice = PRI_MIN;	1516	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1631	if (nice > PRI_MAX) nice = PRI_MAX;	1517	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1632	next_pri = nice + PRI_BIAS;	1518	next_pri = nice;
1633		1519
1634	void	1520	void
1635	flush ()	1521	flush ()
1636	PROTOTYPE:
1637	CODE:	1522	CODE:
1638	while (nreqs)	1523	while (eio_nreqs ())
1639	{	1524	{
1640	poll_wait ();	1525	poll_wait ();
1641	poll_cb (0);	1526	poll_cb ();
1642	}	1527	}
1643		1528
1644	void	1529	int
1645	poll()	1530	poll ()
1646	PROTOTYPE:
1647	CODE:	1531	CODE:
1648	if (nreqs)
1649	{
1650	poll_wait ();	1532	poll_wait ();
1651	poll_cb (0);	1533	RETVAL = poll_cb ();
1652	}
1653
1654	int
1655	poll_fileno()
1656	PROTOTYPE:
1657	CODE:
1658	RETVAL = respipe [0];
1659	OUTPUT:	1534	OUTPUT:
1660	RETVAL	1535	RETVAL
1661		1536
1662	int	1537	int
		1538	poll_fileno ()
		1539	CODE:
		1540	RETVAL = s_epipe_fd (&respipe);
		1541	OUTPUT:
		1542	RETVAL
		1543
		1544	int
1663	poll_cb(...)	1545	poll_cb (...)
1664	PROTOTYPE:	1546	PROTOTYPE:
1665	CODE:	1547	CODE:
1666	RETVAL = poll_cb ();	1548	RETVAL = poll_cb ();
1667	OUTPUT:	1549	OUTPUT:
1668	RETVAL	1550	RETVAL
1669		1551
1670	void	1552	void
1671	poll_wait()	1553	poll_wait ()
1672	PROTOTYPE:
1673	CODE:	1554	CODE:
1674	if (nreqs)
1675	poll_wait ();	1555	poll_wait ();
1676		1556
1677	int	1557	int
1678	nreqs()	1558	nreqs ()
1679	PROTOTYPE:
1680	CODE:	1559	CODE:
1681	RETVAL = nreqs;	1560	RETVAL = eio_nreqs ();
1682	OUTPUT:	1561	OUTPUT:
1683	RETVAL	1562	RETVAL
1684		1563
1685	int	1564	int
1686	nready()	1565	nready ()
1687	PROTOTYPE:
1688	CODE:	1566	CODE:
1689	RETVAL = get_nready ();	1567	RETVAL = eio_nready ();
1690	OUTPUT:	1568	OUTPUT:
1691	RETVAL	1569	RETVAL
1692		1570
1693	int	1571	int
1694	npending()	1572	npending ()
1695	PROTOTYPE:
1696	CODE:	1573	CODE:
1697	RETVAL = get_npending ();	1574	RETVAL = eio_npending ();
1698	OUTPUT:	1575	OUTPUT:
1699	RETVAL	1576	RETVAL
1700		1577
1701	int	1578	int
1702	nthreads()	1579	nthreads ()
1703	PROTOTYPE:
1704	CODE:	1580	CODE:
1705	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1581	RETVAL = eio_nthreads ();
1706	RETVAL = started;
1707	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1708	OUTPUT:	1582	OUTPUT:
1709	RETVAL	1583	RETVAL
1710		1584
		1585	int
		1586	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1587	CODE:
		1588	RETVAL = posix_fadvise (fh, offset, length, advice);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	ssize_t
		1593	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1594	CODE:
		1595	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	void
		1600	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1601	PPCODE:
		1602	sv_unmagic (scalar, MMAP_MAGIC);
		1603	{
		1604	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1605	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1606	if (addr == (void *)-1)
		1607	XSRETURN_NO;
		1608
		1609	sv_force_normal (scalar);
		1610
		1611	/* we store the length in mg_obj, as namlen is I32 :/ */
		1612	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1613	->mg_obj = (SV *)length;
		1614
		1615	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1616
		1617	if (!(prot & PROT_WRITE))
		1618	SvREADONLY_on (scalar);
		1619
		1620	if (SvLEN (scalar))
		1621	Safefree (SvPVX (scalar));
		1622
		1623	SvPVX (scalar) = (char *)addr;
		1624	SvCUR_set (scalar, length);
		1625	SvLEN_set (scalar, 0);
		1626	SvPOK_only (scalar);
		1627
		1628	XSRETURN_YES;
		1629	}
		1630
		1631	void
		1632	munmap (SV *scalar)
		1633	CODE:
		1634	sv_unmagic (scalar, MMAP_MAGIC);
		1635
		1636	int
		1637	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1638	ALIAS:
		1639	mprotect = 1
		1640	CODE:
		1641	{
		1642	STRLEN svlen;
		1643	void *addr = SvPVbyte (scalar, svlen);
		1644	size_t len = SvUV (length);
		1645
		1646	if (offset < 0)
		1647	offset += svlen;
		1648
		1649	if (offset < 0 || offset > svlen)
		1650	croak ("offset outside of scalar");
		1651
		1652	if (!SvOK (length) || len + offset > svlen)
		1653	len = svlen - offset;
		1654
		1655	addr = (void *)(((intptr_t)addr) + offset);
		1656	eio_page_align (&addr, &len);
		1657
		1658	switch (ix)
		1659	{
		1660	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1661	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1662	}
		1663	}
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1669	CODE:
		1670	{
		1671	STRLEN svlen;
		1672	void *addr = SvPVbyte (scalar, svlen);
		1673	size_t len = SvUV (length);
		1674
		1675	if (offset < 0)
		1676	offset += svlen;
		1677
		1678	if (offset < 0 || offset > svlen)
		1679	croak ("offset outside of scalar");
		1680
		1681	if (!SvOK (length) || len + offset > svlen)
		1682	len = svlen - offset;
		1683
		1684	addr = (void *)(((intptr_t)addr) + offset);
		1685	eio_page_align (&addr, &len);
		1686	#if _POSIX_MEMLOCK_RANGE
		1687	RETVAL = munlock (addr, len);
		1688	#else
		1689	RETVAL = ((errno = ENOSYS), -1);
		1690	#endif
		1691	}
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	int
		1696	munlockall ()
		1697	CODE:
		1698	#if _POSIX_MEMLOCK
		1699	munlockall ();
		1700	#else
		1701	RETVAL = -1;
		1702	errno = ENOSYS;
		1703	#endif
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	void _on_next_submit (SV *cb)
		1708	CODE:
		1709	SvREFCNT_dec (on_next_submit);
		1710	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1711
1711	PROTOTYPES: DISABLE	1712	PROTOTYPES: DISABLE
1712		1713
1713	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1714	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1714		1715
1715	void	1716	void
1716	cancel (aio_req_ornot req)	1717	cancel (aio_req_ornot req)
1717	CODE:	1718	CODE:
1718	req_cancel (req);	1719	eio_cancel (req);
1719		1720
1720	void	1721	void
1721	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1722	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1722	CODE:	1723	PPCODE:
		1724	{
		1725	if (GIMME_V != G_VOID)
		1726	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1727
		1728	if (items > 1)
		1729	{
		1730	SV *cb_cv =get_cb (callback);
		1731
1723	SvREFCNT_dec (req->callback);	1732	SvREFCNT_dec (req->callback);
1724	req->callback = newSVsv (callback);	1733	req->callback = SvREFCNT_inc (cb_cv);
		1734	}
		1735	}
1725		1736
1726	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1737	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1727		1738
1728	void	1739	void
1729	add (aio_req grp, ...)	1740	add (aio_req grp, ...)
1730	PPCODE:	1741	PPCODE:
1731	{	1742	{
1732	int i;	1743	int i;
1733	aio_req req;
1734		1744
1735	if (grp->int1 == 2)	1745	if (grp->int1 == 2)
1736	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1746	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1737		1747
1738	for (i = 1; i < items; ++i )	1748	for (i = 1; i < items; ++i )
1739	{	1749	{
		1750	aio_req req;
		1751
1740	if (GIMME_V != G_VOID)	1752	if (GIMME_V != G_VOID)
1741	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1753	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1742		1754
1743	req = SvAIO_REQ (ST (i));	1755	req = SvAIO_REQ (ST (i));
1744		1756
1745	if (req)	1757	if (req)
1746	{	1758	eio_grp_add (grp, req);
1747	++grp->size;
1748	req->grp = grp;
1749
1750	req->grp_prev = 0;
1751	req->grp_next = grp->grp_first;
1752
1753	if (grp->grp_first)
1754	grp->grp_first->grp_prev = req;
1755
1756	grp->grp_first = req;
1757	}
1758	}	1759	}
1759	}	1760	}
1760		1761
1761	void	1762	void
1762	cancel_subs (aio_req_ornot req)	1763	cancel_subs (aio_req_ornot req)
…		…
1771	AV *av;	1772	AV *av;
1772		1773
1773	grp->errorno = errno;	1774	grp->errorno = errno;
1774		1775
1775	av = newAV ();	1776	av = newAV ();
		1777	av_extend (av, items - 1);
1776		1778
1777	for (i = 1; i < items; ++i )	1779	for (i = 1; i < items; ++i )
1778	av_push (av, newSVsv (ST (i)));	1780	av_push (av, newSVsv (ST (i)));
1779		1781
1780	SvREFCNT_dec (grp->sv1);	1782	SvREFCNT_dec (grp->sv1);
…		…
1787	grp->errorno = errorno;	1789	grp->errorno = errorno;
1788		1790
1789	void	1791	void
1790	limit (aio_req grp, int limit)	1792	limit (aio_req grp, int limit)
1791	CODE:	1793	CODE:
1792	grp->int2 = limit;	1794	eio_grp_limit (grp, limit);
1793	aio_grp_feed (grp);
1794		1795
1795	void	1796	void
1796	feed (aio_req grp, SV *callback=&PL_sv_undef)	1797	feed (aio_req grp, SV *callback=&PL_sv_undef)
1797	CODE:	1798	CODE:
1798	{	1799	{
1799	SvREFCNT_dec (grp->sv2);	1800	SvREFCNT_dec (grp->sv2);
1800	grp->sv2 = newSVsv (callback);	1801	grp->sv2 = newSVsv (callback);
		1802	grp->feed = aio_grp_feed;
1801		1803
1802	if (grp->int2 <= 0)	1804	if (grp->int2 <= 0)
1803	grp->int2 = 2;	1805	grp->int2 = 2;
1804		1806
1805	aio_grp_feed (grp);	1807	eio_grp_limit (grp, grp->int2);
1806	}	1808	}
1807		1809

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