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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.90 by root, Tue Oct 31 00:32:19 2006 UTC vs.
Revision 1.181 by root, Tue Feb 15 03:21:41 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>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
38	# include <sys/uio.h>	68	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	#ifndef POSIX_FADV_NORMAL
		127	# define POSIX_FADV_NORMAL 0
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if !HAVE_POSIX_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	#endif
		152	#ifndef POSIX_MADV_SEQUENTIAL
		153	# define POSIX_MADV_SEQUENTIAL 0
		154	#endif
		155	#ifndef POSIX_MADV_RANDOM
		156	# define POSIX_MADV_RANDOM 0
		157	#endif
		158	#ifndef POSIX_MADV_WILLNEED
		159	# define POSIX_MADV_WILLNEED 0
		160	#endif
		161	#ifndef POSIX_MADV_DONTNEED
		162	# define POSIX_MADV_DONTNEED 0
		163	#endif
		164
		165	#if !HAVE_POSIX_MADVISE
		166	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		167	#endif
		168
		169	#ifndef PROT_NONE
		170	# define PROT_NONE 0
		171	#endif
		172	#ifndef PROT_READ
		173	# define PROT_READ 0
		174	#endif
		175	#ifndef PROT_WRITE
		176	# define PROT_READ 0
		177	#endif
		178	#ifndef PROT_EXEC
		179	# define PROT_EXEC 0
		180	#endif
		181
		182	#ifndef ST_NODEV
		183	# define ST_NODEV 0
		184	#endif
		185	#ifndef ST_NOEXEC
		186	# define ST_NOEXEC 0
		187	#endif
		188	#ifndef ST_SYNCHRONOUS
		189	# define ST_SYNCHRONOUS 0
		190	#endif
		191	#ifndef ST_MANDLOCK
		192	# define ST_MANDLOCK 0
		193	#endif
		194	#ifndef ST_WRITE
		195	# define ST_WRITE 0
		196	#endif
		197	#ifndef ST_APPEND
		198	# define ST_APPEND 0
		199	#endif
		200	#ifndef ST_IMMUTABLE
		201	# define ST_IMMUTABLE 0
		202	#endif
		203	#ifndef ST_NOATIME
		204	# define ST_NOATIME 0
		205	#endif
		206	#ifndef ST_NODIRATIME
		207	# define ST_NODIRATIME 0
		208	#endif
		209	#ifndef ST_RELATIME
		210	# define ST_RELATIME 0
		211	#endif
		212
		213	#ifndef S_IFIFO
		214	# define S_IFIFO 0
		215	#endif
		216	#ifndef S_IFCHR
		217	# define S_IFCHR 0
		218	#endif
		219	#ifndef S_IFBLK
		220	# define S_IFBLK 0
		221	#endif
		222	#ifndef S_IFLNK
		223	# define S_IFLNK 0
		224	#endif
		225	#ifndef S_IFREG
		226	# define S_IFREG 0
		227	#endif
		228	#ifndef S_IFDIR
		229	# define S_IFDIR 0
		230	#endif
		231	#ifndef S_IFWHT
		232	# define S_IFWHT 0
		233	#endif
		234	#ifndef S_IFSOCK
		235	# define S_IFSOCK 0
		236	#endif
		237
		238	#ifndef MAP_ANONYMOUS
		239	# ifdef MAP_ANON
		240	# define MAP_ANONYMOUS MAP_ANON
43	# else	241	# else
44	# error sendfile support requested but not available	242	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	243	# endif
46	#endif	244	#endif
47		245	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	246	# 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	247	#endif
		248	#ifndef MAP_LOCKED
		249	# define MAP_LOCKED 0
79	#endif	250	#endif
		251	#ifndef MAP_NORESERVE
		252	# define MAP_NORESERVE 0
		253	#endif
		254	#ifndef MAP_POPULATE
		255	# define MAP_POPULATE 0
		256	#endif
		257	#ifndef MAP_NONBLOCK
		258	# define MAP_NONBLOCK 0
		259	#endif
80		260
81	/* buffer size for various temporary buffers */	261	#ifndef makedev
82	#define AIO_BUFSIZE 65536	262	# define makedev(maj,min) (((maj) << 8) | (min))
		263	#endif
		264	#ifndef major
		265	# define major(dev) ((dev) >> 8)
		266	#endif
		267	#ifndef minor
		268	# define minor(dev) ((dev) & 0xff)
		269	#endif
83		270
84	#define dBUF \	271	#ifndef PAGESIZE
85	char *aio_buf; \	272	# define PAGESIZE sysconf (_SC_PAGESIZE)
86	LOCK (wrklock); \	273	#endif
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		274
92	typedef SV SV8; /* byte-sv, used for argument-checking */	275	static int req_invoke (eio_req *req);
		276	#define EIO_FINISH(req) req_invoke (req)
		277	static void req_destroy (eio_req *grp);
		278	#define EIO_DESTROY(req) req_destroy (req)
93		279
94	enum {	280	enum {
95	REQ_QUIT,	281	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
96	REQ_OPEN, REQ_CLOSE,
97	REQ_READ, REQ_WRITE, REQ_READAHEAD,
98	REQ_SENDFILE,
99	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
100	REQ_FSYNC, REQ_FDATASYNC,
101	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
102	REQ_MKNOD, REQ_READDIR,
103	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104	REQ_GROUP, REQ_NOP,
105	REQ_BUSY,
106	};	282	};
107		283
108	#define AIO_REQ_KLASS "IO::AIO::REQ"	284	#include "libeio/eio.c"
109	#define AIO_GRP_KLASS "IO::AIO::GRP"
110		285
111	typedef struct aio_cb
112	{
113	struct aio_cb *volatile next;
114
115	SV *callback, *fh;
116	SV *sv1, *sv2;
117	void *ptr1, *ptr2;
118	off_t offs;
119	size_t size;
120	ssize_t result;
121
122	STRLEN stroffset;
123	int type;
124	int int1, int2;
125	int errorno;
126	mode_t mode; /* open */
127
128	unsigned char flags;
129	unsigned char pri;
130
131	SV *self; /* the perl counterpart of this request, if any */
132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
133	} aio_cb;
134
135	enum {
136	FLAG_CANCELLED = 0x01, /* request was cancelled */
137	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
138	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139	};
140
141	typedef aio_cb *aio_req;	286	typedef eio_req *aio_req;
142	typedef aio_cb *aio_req_ornot;	287	typedef eio_req *aio_req_ornot;
143		288
144	enum {	289	static SV *on_next_submit;
145	PRI_MIN = -4,	290	static int next_pri = EIO_PRI_DEFAULT;
146	PRI_MAX = 4,	291	static int max_outstanding;
147		292
148	DEFAULT_PRI = 0,	293	static s_epipe respipe;
149	PRI_BIAS = -PRI_MIN,
150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151	};
152		294
153	#define AIO_TICKS ((1000000 + 1023) >> 10)
154
155	static unsigned int max_poll_time = 0;
156	static unsigned int max_poll_reqs = 0;
157
158	/* calculcate time difference in ~1/AIO_TICKS of a second */
159	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
160	{
161	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171	#else
172	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173	#endif
174
175	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178	/* worker threads management */
179	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
180
181	typedef struct worker {
182	/* locked by wrklock */
183	struct worker *prev, *next;
184
185	pthread_t tid;
186
187	/* locked by reslock, reqlock or wrklock */
188	aio_req req; /* currently processed request */
189	void *dbuf;
190	DIR *dirp;
191	} worker;
192
193	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
194
195	static void worker_clear (worker *wrk)
196	{
197	if (wrk->dirp)
198	{
199	closedir (wrk->dirp);
200	wrk->dirp = 0;
201	}
202
203	if (wrk->dbuf)
204	{
205	free (wrk->dbuf);
206	wrk->dbuf = 0;
207	}
208	}
209
210	static void worker_free (worker *wrk)
211	{
212	wrk->next->prev = wrk->prev;
213	wrk->prev->next = wrk->next;
214
215	free (wrk);
216	}
217
218	static volatile unsigned int nreqs, nready, npending;
219	static volatile unsigned int max_idle = 4;
220	static volatile unsigned int max_outstanding = 0xffffffff;
221	static int respipe [2];
222
223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
226
227	#if WORDACCESS_UNSAFE
228
229	static unsigned int get_nready ()
230	{
231	unsigned int retval;
232
233	LOCK (reqlock);
234	retval = nready;
235	UNLOCK (reqlock);
236
237	return retval;
238	}
239
240	static unsigned int get_npending ()
241	{
242	unsigned int retval;
243
244	LOCK (reslock);
245	retval = npending;
246	UNLOCK (reslock);
247
248	return retval;
249	}
250
251	static unsigned int get_nthreads ()
252	{
253	unsigned int retval;
254
255	LOCK (wrklock);
256	retval = started;
257	UNLOCK (wrklock);
258
259	return retval;
260	}
261
262	#else
263
264	# define get_nready() nready
265	# define get_npending() npending
266	# define get_nthreads() started
267
268	#endif
269
270	/*
271	* a somewhat faster data structure might be nice, but
272	* with 8 priorities this actually needs <20 insns
273	* per shift, the most expensive operation.
274	*/
275	typedef struct {
276	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
277	int size;
278	} reqq;
279
280	static reqq req_queue;
281	static reqq res_queue;
282
283	int reqq_push (reqq *q, aio_req req)
284	{
285	int pri = req->pri;
286	req->next = 0;
287
288	if (q->qe[pri])
289	{
290	q->qe[pri]->next = req;
291	q->qe[pri] = req;
292	}
293	else
294	q->qe[pri] = q->qs[pri] = req;
295
296	return q->size++;
297	}
298
299	aio_req reqq_shift (reqq *q)
300	{
301	int pri;
302
303	if (!q->size)
304	return 0;
305
306	--q->size;
307
308	for (pri = NUM_PRI; pri--; )
309	{
310	aio_req req = q->qs[pri];
311
312	if (req)
313	{
314	if (!(q->qs[pri] = req->next))
315	q->qe[pri] = 0;
316
317	return req;
318	}
319	}
320
321	abort ();
322	}
323
324	static int poll_cb ();
325	static void req_invoke (aio_req req);
326	static void req_free (aio_req req);	295	static void req_destroy (aio_req req);
327	static void req_cancel (aio_req req);	296	static void req_cancel (aio_req req);
328		297
		298	static void want_poll (void)
		299	{
		300	/* write a dummy byte to the pipe so fh becomes ready */
		301	s_epipe_signal (&respipe);
		302	}
		303
		304	static void done_poll (void)
		305	{
		306	/* read any signals sent by the worker threads */
		307	s_epipe_drain (&respipe);
		308	}
		309
329	/* must be called at most once */	310	/* must be called at most once */
330	static SV *req_sv (aio_req req, const char *klass)	311	static SV *req_sv (aio_req req, HV *stash)
331	{	312	{
332	if (!req->self)	313	if (!req->self)
333	{	314	{
334	req->self = (SV *)newHV ();	315	req->self = (SV *)newHV ();
335	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	316	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
336	}	317	}
337		318
338	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	319	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
339	}	320	}
340		321
341	static aio_req SvAIO_REQ (SV *sv)	322	static aio_req SvAIO_REQ (SV *sv)
342	{	323	{
343	MAGIC *mg;	324	MAGIC *mg;
344		325
345	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	326	if (!SvROK (sv)
		327	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		328	&& SvSTASH (SvRV (sv)) != aio_req_stash
		329	&& !sv_derived_from (sv, "IO::AIO::REQ")))
346	croak ("object of class " AIO_REQ_KLASS " expected");	330	croak ("object of class IO::AIO::REQ expected");
347		331
348	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	332	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
349		333
350	return mg ? (aio_req)mg->mg_ptr : 0;	334	return mg ? (aio_req)mg->mg_ptr : 0;
351	}	335	}
352		336
353	static void aio_grp_feed (aio_req grp)	337	static void aio_grp_feed (aio_req grp)
354	{	338	{
355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	339	if (grp->sv2 && SvOK (grp->sv2))
356	{	340	{
357	int old_len = grp->size;
358
359	if (grp->sv2 && SvOK (grp->sv2))
360	{
361	dSP;	341	dSP;
362		342
363	ENTER;	343	ENTER;
364	SAVETMPS;	344	SAVETMPS;
365	PUSHMARK (SP);	345	PUSHMARK (SP);
366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	346	XPUSHs (req_sv (grp, aio_grp_stash));
367	PUTBACK;	347	PUTBACK;
368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	348	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369	SPAGAIN;	349	SPAGAIN;
370	FREETMPS;	350	FREETMPS;
371	LEAVE;	351	LEAVE;
372	}
373
374	/* stop if no progress has been made */
375	if (old_len == grp->size)
376	{
377	SvREFCNT_dec (grp->sv2);
378	grp->sv2 = 0;
379	break;
380	}
381	}	352	}
382	}	353	}
383		354
384	static void aio_grp_dec (aio_req grp)	355	static void req_submit (eio_req *req)
385	{	356	{
386	--grp->size;	357	eio_submit (req);
387		358
388	/* call feeder, if applicable */	359	if (expect_false (on_next_submit))
389	aio_grp_feed (grp);
390
391	/* finish, if done */
392	if (!grp->size && grp->int1)
393	{	360	{
394	req_invoke (grp);	361	dSP;
395	req_free (grp);	362	SV *cb = sv_2mortal (on_next_submit);
		363
		364	on_next_submit = 0;
		365
		366	PUSHMARK (SP);
		367	PUTBACK;
		368	call_sv (cb, G_DISCARD | G_EVAL);
396	}	369	}
397	}	370	}
398		371
399	static void req_invoke (aio_req req)	372	static int req_invoke (eio_req *req)
400	{	373	{
401	dSP;
402
403	if (req->flags & FLAG_SV1_RO_OFF)	374	if (req->flags & FLAG_SV2_RO_OFF)
404	SvREADONLY_off (req->sv1);	375	SvREADONLY_off (req->sv2);
405		376
406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	377	if (!EIO_CANCELLED (req) && req->callback)
407	{	378	{
		379	dSP;
		380	static SV *sv_result_cache; /* caches the result integer SV */
		381	SV *sv_result;
		382
408	ENTER;	383	ENTER;
409	SAVETMPS;	384	SAVETMPS;
410	PUSHMARK (SP);	385	PUSHMARK (SP);
411	EXTEND (SP, 1);	386	EXTEND (SP, 1);
412		387
		388	/* do not recreate the result IV from scratch each time */
		389	if (expect_true (sv_result_cache))
		390	{
		391	sv_result = sv_result_cache; sv_result_cache = 0;
		392	SvIV_set (sv_result, req->result);
		393	SvIOK_only (sv_result);
		394	}
		395	else
		396	{
		397	sv_result = newSViv (req->result);
		398	SvREADONLY_on (sv_result);
		399	}
		400
413	switch (req->type)	401	switch (req->type)
414	{	402	{
415	case REQ_READDIR:	403	case EIO_READDIR:
416	{	404	{
417	SV *rv = &PL_sv_undef;	405	SV *rv = &PL_sv_undef;
418		406
419	if (req->result >= 0)	407	if (req->result >= 0)
420	{	408	{
421	int i;	409	int i;
422	char *buf = req->ptr2;	410	char *names = (char *)req->ptr2;
		411	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
423	AV *av = newAV ();	412	AV *av = newAV ();
424		413
425	av_extend (av, req->result - 1);	414	av_extend (av, req->result - 1);
426		415
427	for (i = 0; i < req->result; ++i)	416	for (i = 0; i < req->result; ++i)
428	{	417	{
429	SV *sv = newSVpv (buf, 0);	418	if (req->int1 & EIO_READDIR_DENTS)
		419	{
		420	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
430		421
		422	if (req->int1 & EIO_READDIR_CUSTOM2)
		423	{
		424	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		425	AV *avent = newAV ();
		426
		427	av_extend (avent, 2);
		428
		429	if (!sv_type [ent->type])
		430	{
		431	sv_type [ent->type] = newSViv (ent->type);
		432	SvREADONLY_on (sv_type [ent->type]);
		433	}
		434
		435	av_store (avent, 0, namesv);
		436	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		437	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		438
		439	av_store (av, i, newRV_noinc ((SV *)avent));
		440	}
		441	else
431	av_store (av, i, sv);	442	av_store (av, i, namesv);
		443
		444	++ent;
		445	}
		446	else
		447	{
		448	SV *name = newSVpv (names, 0);
		449	av_store (av, i, name);
432	buf += SvCUR (sv) + 1;	450	names += SvCUR (name) + 1;
		451	}
433	}	452	}
434		453
435	rv = sv_2mortal (newRV_noinc ((SV *)av));	454	rv = sv_2mortal (newRV_noinc ((SV *)av));
436	}	455	}
437		456
438	PUSHs (rv);	457	PUSHs (rv);
		458
		459	if (req->int1 & EIO_READDIR_CUSTOM1)
		460	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
439	}	461	}
440	break;	462	break;
441		463
442	case REQ_OPEN:	464	case EIO_OPEN:
443	{	465	{
444	/* convert fd to fh */	466	/* convert fd to fh */
445	SV *fh;	467	SV *fh = &PL_sv_undef;
446		468
447	PUSHs (sv_2mortal (newSViv (req->result)));	469	if (req->result >= 0)
448	PUTBACK;	470	{
449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	471	GV *gv = (GV *)sv_newmortal ();
450	SPAGAIN;	472	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		473	char sym [64];
		474	int symlen;
		475
		476	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		477	gv_init (gv, aio_stash, sym, symlen, 0);
451		478
452	fh = SvREFCNT_inc (POPs);	479	symlen = snprintf (
		480	sym,
		481	sizeof (sym),
		482	"%s&=%d",
		483	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		484	(int)req->result
		485	);
453		486
		487	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		488	fh = (SV *)gv;
		489	}
		490
454	PUSHMARK (SP);	491	PUSHs (fh);
455	XPUSHs (sv_2mortal (fh));
456	}	492	}
457	break;	493	break;
458		494
		495	case EIO_STATVFS:
		496	case EIO_FSTATVFS:
		497	{
		498	SV *rv = &PL_sv_undef;
		499
		500	if (req->result >= 0)
		501	{
		502	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		503	HV *hv = newHV ();
		504
		505	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		506
		507	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		508	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		509	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		510	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		511	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		512	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		513	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		514	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		515	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		516	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		517	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		518	}
		519
		520	PUSHs (rv);
		521	}
		522
		523	break;
		524
459	case REQ_GROUP:	525	case EIO_GROUP:
460	req->int1 = 2; /* mark group as finished */	526	req->int1 = 2; /* mark group as finished */
461		527
462	if (req->sv1)	528	if (req->sv1)
463	{	529	{
464	int i;	530	int i;
…		…
468	for (i = 0; i <= AvFILL (av); ++i)	534	for (i = 0; i <= AvFILL (av); ++i)
469	PUSHs (*av_fetch (av, i, 0));	535	PUSHs (*av_fetch (av, i, 0));
470	}	536	}
471	break;	537	break;
472		538
473	case REQ_NOP:	539	case EIO_NOP:
474	case REQ_BUSY:	540	case EIO_BUSY:
475	break;	541	break;
476		542
477	case REQ_READLINK:	543	case EIO_READLINK:
478	if (req->result > 0)	544	if (req->result > 0)
479	{	545	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
480	SvCUR_set (req->sv1, req->result);
481	*SvEND (req->sv1) = 0;
482	PUSHs (req->sv1);
483	}
484	break;	546	break;
485		547
486	case REQ_STAT:	548	case EIO_STAT:
487	case REQ_LSTAT:	549	case EIO_LSTAT:
488	case REQ_FSTAT:	550	case EIO_FSTAT:
489	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	551	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
490	PL_laststatval = req->result;	552	PL_laststatval = req->result;
491	PL_statcache = *(Stat_t *)(req->ptr2);	553	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
492	PUSHs (sv_2mortal (newSViv (req->result)));	554	PUSHs (sv_result);
493	break;	555	break;
494		556
495	case REQ_READ:	557	case EIO_READ:
		558	{
496	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	559	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
497	*SvEND (req->sv1) = 0;	560	*SvEND (req->sv2) = 0;
498	PUSHs (sv_2mortal (newSViv (req->result)));	561	SvPOK_only (req->sv2);
		562	SvSETMAGIC (req->sv2);
		563	PUSHs (sv_result);
		564	}
499	break;	565	break;
500		566
		567	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		568	if (req->result > 0)
		569	SvIV_set (sv_result, 0);
		570	/* FALLTHROUGH */
		571
501	default:	572	default:
502	PUSHs (sv_2mortal (newSViv (req->result)));	573	PUSHs (sv_result);
503	break;	574	break;
504	}	575	}
505		576
506	errno = req->errorno;	577	errno = req->errorno;
507		578
508	PUTBACK;	579	PUTBACK;
509	call_sv (req->callback, G_VOID | G_EVAL);	580	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
510	SPAGAIN;	581	SPAGAIN;
		582
		583	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		584	SvREFCNT_dec (sv_result);
		585	else
		586	sv_result_cache = sv_result;
511		587
512	FREETMPS;	588	FREETMPS;
513	LEAVE;	589	LEAVE;
		590
		591	PUTBACK;
514	}	592	}
515		593
516	if (req->grp)	594	return !!SvTRUE (ERRSV);
517	{
518	aio_req grp = req->grp;
519
520	/* unlink request */
521	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
522	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
523
524	if (grp->grp_first == req)
525	grp->grp_first = req->grp_next;
526
527	aio_grp_dec (grp);
528	}
529
530	if (SvTRUE (ERRSV))
531	{
532	req_free (req);
533	croak (0);
534	}
535	}	595	}
536		596
537	static void req_free (aio_req req)	597	static void req_destroy (aio_req req)
538	{	598	{
539	if (req->self)	599	if (req->self)
540	{	600	{
541	sv_unmagic (req->self, PERL_MAGIC_ext);	601	sv_unmagic (req->self, PERL_MAGIC_ext);
542	SvREFCNT_dec (req->self);	602	SvREFCNT_dec (req->self);
543	}	603	}
544		604
545	SvREFCNT_dec (req->fh);
546	SvREFCNT_dec (req->sv1);	605	SvREFCNT_dec (req->sv1);
547	SvREFCNT_dec (req->sv2);	606	SvREFCNT_dec (req->sv2);
548	SvREFCNT_dec (req->callback);	607	SvREFCNT_dec (req->callback);
549		608
550	if (req->flags & FLAG_PTR2_FREE)
551	free (req->ptr2);
552
553	Safefree (req);	609	Safefree (req);
554	}	610	}
555		611
556	static void req_cancel_subs (aio_req grp)	612	static void req_cancel_subs (aio_req grp)
557	{	613	{
558	aio_req sub;	614	aio_req sub;
559		615
560	if (grp->type != REQ_GROUP)	616	if (grp->type != EIO_GROUP)
561	return;	617	return;
562		618
563	SvREFCNT_dec (grp->sv2);	619	SvREFCNT_dec (grp->sv2);
564	grp->sv2 = 0;	620	grp->sv2 = 0;
565		621
566	for (sub = grp->grp_first; sub; sub = sub->grp_next)	622	eio_grp_cancel (grp);
567	req_cancel (sub);
568	}	623	}
569		624
570	static void req_cancel (aio_req req)	625	static void
		626	create_respipe (void)
571	{	627	{
572	req->flags |= FLAG_CANCELLED;	628	if (s_epipe_renew (&respipe))
573		629	croak ("IO::AIO: unable to initialize result pipe");
574	req_cancel_subs (req);
575	}	630	}
576		631
577	static void *aio_proc(void *arg);
578
579	static void start_thread (void)
580	{
581	sigset_t fullsigset, oldsigset;
582	pthread_attr_t attr;
583
584	worker *wrk = calloc (1, sizeof (worker));
585
586	if (!wrk)
587	croak ("unable to allocate worker thread data");
588
589	pthread_attr_init (&attr);
590	pthread_attr_setstacksize (&attr, STACKSIZE);
591	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
592	#ifdef PTHREAD_SCOPE_PROCESS
593	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
594	#endif
595
596	sigfillset (&fullsigset);
597
598	LOCK (wrklock);
599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
600
601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
602	{
603	wrk->prev = &wrk_first;
604	wrk->next = wrk_first.next;
605	wrk_first.next->prev = wrk;
606	wrk_first.next = wrk;
607	++started;
608	}
609	else
610	free (wrk);
611
612	sigprocmask (SIG_SETMASK, &oldsigset, 0);
613	UNLOCK (wrklock);
614	}
615
616	static void maybe_start_thread ()
617	{
618	if (get_nthreads () >= wanted)
619	return;
620
621	/* todo: maybe use idle here, but might be less exact */
622	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
623	return;
624
625	start_thread ();
626	}
627
628	static void req_send (aio_req req)
629	{
630	++nreqs;
631
632	LOCK (reqlock);
633	++nready;
634	reqq_push (&req_queue, req);
635	pthread_cond_signal (&reqwait);
636	UNLOCK (reqlock);
637
638	maybe_start_thread ();
639	}
640
641	static void end_thread (void)
642	{
643	aio_req req;
644
645	Newz (0, req, 1, aio_cb);
646
647	req->type = REQ_QUIT;
648	req->pri = PRI_MAX + PRI_BIAS;
649
650	LOCK (reqlock);
651	reqq_push (&req_queue, req);
652	pthread_cond_signal (&reqwait);
653	UNLOCK (reqlock);
654
655	LOCK (wrklock);
656	--started;
657	UNLOCK (wrklock);
658	}
659
660	static void set_max_idle (int nthreads)
661	{
662	if (WORDACCESS_UNSAFE) LOCK (reqlock);
663	max_idle = nthreads <= 0 ? 1 : nthreads;
664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
665	}
666
667	static void min_parallel (int nthreads)
668	{
669	if (wanted < nthreads)
670	wanted = nthreads;
671	}
672
673	static void max_parallel (int nthreads)
674	{
675	if (wanted > nthreads)
676	wanted = nthreads;
677
678	while (started > wanted)
679	end_thread ();
680	}
681
682	static void poll_wait ()	632	static void poll_wait (void)
683	{	633	{
684	fd_set rfd;
685
686	while (nreqs)	634	while (eio_nreqs ())
687	{	635	{
688	int size;	636	int size;
689	if (WORDACCESS_UNSAFE) LOCK (reslock);	637
		638	X_LOCK (reslock);
690	size = res_queue.size;	639	size = res_queue.size;
691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	640	X_UNLOCK (reslock);
692		641
693	if (size)	642	if (size)
694	return;	643	return;
695		644
696	maybe_start_thread ();	645	etp_maybe_start_thread ();
697		646
698	FD_ZERO(&rfd);	647	s_epipe_wait (&respipe);
699	FD_SET(respipe [0], &rfd);
700
701	select (respipe [0] + 1, &rfd, 0, 0, 0);
702	}	648	}
703	}	649	}
704		650
705	static int poll_cb ()	651	static int poll_cb (void)
706	{	652	{
707	dSP;
708	int count = 0;
709	int maxreqs = max_poll_reqs;
710	int do_croak = 0;
711	struct timeval tv_start, tv_now;
712	aio_req req;
713
714	if (max_poll_time)
715	gettimeofday (&tv_start, 0);
716
717	for (;;)	653	for (;;)
718	{	654	{
719	for (;;)	655	int res = eio_poll ();
720	{
721	maybe_start_thread ();
722		656
723	LOCK (reslock);	657	if (res > 0)
724	req = reqq_shift (&res_queue);
725
726	if (req)
727	{
728	--npending;
729
730	if (!res_queue.size)
731	{
732	/* read any signals sent by the worker threads */
733	char buf [32];
734	while (read (respipe [0], buf, 32) == 32)
735	;
736	}
737	}
738
739	UNLOCK (reslock);
740
741	if (!req)
742	break;
743
744	--nreqs;
745
746	if (req->type == REQ_GROUP && req->size)
747	{
748	req->int1 = 1; /* mark request as delayed */
749	continue;
750	}
751	else
752	{
753	req_invoke (req);
754
755	count++;
756	}
757
758	req_free (req);
759
760	if (maxreqs && !--maxreqs)
761	break;
762
763	if (max_poll_time)
764	{
765	gettimeofday (&tv_now, 0);
766
767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
768	break;
769	}
770	}
771
772	if (nreqs <= max_outstanding)
773	break;	658	croak (0);
		659
		660	if (!max_outstanding || max_outstanding > eio_nreqs ())
		661	return res;
774		662
775	poll_wait ();	663	poll_wait ();
776
777	++maxreqs;
778	}	664	}
779
780	return count;
781	}	665	}
782		666
783	static void create_pipe ()	667	static void atfork_child (void)
784	{	668	{
785	if (pipe (respipe))	669	create_respipe ();
786	croak ("unable to initialize result pipe");
787
788	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790
791	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
792	croak ("cannot set result pipe to nonblocking mode");
793	}	670	}
794		671
795	/*****************************************************************************/	672	/*****************************************************************************/
796	/* work around various missing functions */
797		673
798	#if !HAVE_PREADWRITE	674	#if !_POSIX_MAPPED_FILES
799	# define pread aio_pread	675	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
800	# define pwrite aio_pwrite	676	# define munmap(addr,length) (errno = ENOSYS, -1)
801
802	/*
803	* make our pread/pwrite safe against themselves, but not against
804	* normal read/write by using a mutex. slows down execution a lot,
805	* but that's your problem, not mine.
806	*/
807	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
808
809	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
810	{
811	ssize_t res;
812	off_t ooffset;
813
814	LOCK (preadwritelock);
815	ooffset = lseek (fd, 0, SEEK_CUR);
816	lseek (fd, offset, SEEK_SET);
817	res = read (fd, buf, count);
818	lseek (fd, ooffset, SEEK_SET);
819	UNLOCK (preadwritelock);
820
821	return res;
822	}
823
824	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
825	{
826	ssize_t res;
827	off_t ooffset;
828
829	LOCK (preadwritelock);
830	ooffset = lseek (fd, 0, SEEK_CUR);
831	lseek (fd, offset, SEEK_SET);
832	res = write (fd, buf, count);
833	lseek (fd, offset, SEEK_SET);
834	UNLOCK (preadwritelock);
835
836	return res;
837	}
838	#endif
839
840	#if !HAVE_FDATASYNC
841	# define fdatasync fsync
842	#endif
843
844	#if !HAVE_READAHEAD
845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
846
847	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
848	{
849	dBUF;
850
851	while (count > 0)
852	{
853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
854
855	pread (fd, aio_buf, len, offset);
856	offset += len;
857	count -= len;
858	}
859
860	errno = 0;
861	}
862
863	#endif
864
865	#if !HAVE_READDIR_R
866	# define readdir_r aio_readdir_r
867
868	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
869
870	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
871	{
872	struct dirent *e;
873	int errorno;
874
875	LOCK (readdirlock);
876
877	e = readdir (dirp);
878	errorno = errno;
879
880	if (e)
881	{
882	*res = ent;
883	strcpy (ent->d_name, e->d_name);
884	}
885	else
886	*res = 0;
887
888	UNLOCK (readdirlock);
889
890	errno = errorno;
891	return e ? 0 : -1;
892	}
893	#endif
894
895	/* sendfile always needs emulation */
896	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
897	{
898	ssize_t res;
899
900	if (!count)
901	return 0;
902
903	#if HAVE_SENDFILE
904	# if __linux
905	res = sendfile (ofd, ifd, &offset, count);
906
907	# elif __freebsd
908	/*
909	* Of course, the freebsd sendfile is a dire hack with no thoughts
910	* wasted on making it similar to other I/O functions.
911	*/
912	{
913	off_t sbytes;
914	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
915
916	if (res < 0 && sbytes)
917	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
918	res = sbytes;
919	}
920
921	# elif __hpux
922	res = sendfile (ofd, ifd, offset, count, 0, 0);
923
924	# elif __solaris
925	{
926	struct sendfilevec vec;
927	size_t sbytes;
928
929	vec.sfv_fd = ifd;
930	vec.sfv_flag = 0;
931	vec.sfv_off = offset;
932	vec.sfv_len = count;
933
934	res = sendfilev (ofd, &vec, 1, &sbytes);
935
936	if (res < 0 && sbytes)
937	res = sbytes;
938	}
939
940	# endif	677	#endif
941	#else
942	res = -1;
943	errno = ENOSYS;
944	#endif
945		678
946	if (res < 0	679	#if !_POSIX_MEMORY_PROTECTION
947	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	680	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
948	#if __solaris	681	# define PROT_NONE 0
949	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	682	# define PROT_WRITE 0
		683	# define MAP_PRIVATE 0
		684	# define MAP_SHARED 0
		685	# define MAP_FIXED 0
950	#endif	686	#endif
951	)
952	)
953	{
954	/* emulate sendfile. this is a major pain in the ass */
955	dBUF;
956		687
957	res = 0;	688	#define MMAP_MAGIC PERL_MAGIC_ext
958		689
959	while (count)	690	static int
960	{	691	mmap_free (pTHX_ SV *sv, MAGIC *mg)
961	ssize_t cnt;	692	{
962		693	int old_errno = errno;
963	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);	694	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		695	errno = old_errno;
964		696
965	if (cnt <= 0)	697	mg->mg_obj = 0; /* just in case */
966	{
967	if (cnt && !res) res = -1;
968	break;
969	}
970		698
971	cnt = write (ofd, aio_buf, cnt);	699	SvREADONLY_off (sv);
972		700
973	if (cnt <= 0)	701	if (SvPVX (sv) != mg->mg_ptr)
974	{	702	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
975	if (cnt && !res) res = -1;
976	break;
977	}
978		703
979	offset += cnt;	704	SvCUR_set (sv, 0);
980	res += cnt;	705	SvPVX (sv) = 0;
981	count -= cnt;	706	SvOK_off (sv);
982	}
983	}
984		707
985	return res;	708	return 0;
986	}	709	}
987		710
988	/* read a full directory */	711	static MGVTBL mmap_vtbl = {
989	static void scandir_ (aio_req req, worker *self)	712	0, 0, 0, 0, mmap_free
990	{	713	};
991	DIR *dirp;
992	union
993	{
994	struct dirent d;
995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
996	} *u;
997	struct dirent *entp;
998	char *name, *names;
999	int memlen = 4096;
1000	int memofs = 0;
1001	int res = 0;
1002	int errorno;
1003
1004	LOCK (wrklock);
1005	self->dirp = dirp = opendir (req->ptr1);
1006	self->dbuf = u = malloc (sizeof (*u));
1007	req->flags |= FLAG_PTR2_FREE;
1008	req->ptr2 = names = malloc (memlen);
1009	UNLOCK (wrklock);
1010
1011	if (dirp && u && names)
1012	for (;;)
1013	{
1014	errno = 0;
1015	readdir_r (dirp, &u->d, &entp);
1016
1017	if (!entp)
1018	break;
1019
1020	name = entp->d_name;
1021
1022	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1023	{
1024	int len = strlen (name) + 1;
1025
1026	res++;
1027
1028	while (memofs + len > memlen)
1029	{
1030	memlen *= 2;
1031	LOCK (wrklock);
1032	req->ptr2 = names = realloc (names, memlen);
1033	UNLOCK (wrklock);
1034
1035	if (!names)
1036	break;
1037	}
1038
1039	memcpy (names + memofs, name, len);
1040	memofs += len;
1041	}
1042	}
1043
1044	if (errno)
1045	res = -1;
1046
1047	req->result = res;
1048	}
1049		714
1050	/*****************************************************************************/	715	/*****************************************************************************/
1051		716
1052	static void *aio_proc (void *thr_arg)	717	static SV *
		718	get_cb (SV *cb_sv)
1053	{	719	{
1054	aio_req req;	720	SvGETMAGIC (cb_sv);
1055	struct timespec ts;	721	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1056	worker *self = (worker *)thr_arg;
1057
1058	/* try to distribute timeouts somewhat evenly */
1059	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1060	* (1000000000UL / 1024UL);
1061
1062	for (;;)
1063	{
1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1065
1066	LOCK (reqlock);
1067
1068	for (;;)
1069	{
1070	self->req = req = reqq_shift (&req_queue);
1071
1072	if (req)
1073	break;
1074
1075	++idle;
1076
1077	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1078	== ETIMEDOUT)
1079	{
1080	if (idle > max_idle)
1081	{
1082	--idle;
1083	UNLOCK (reqlock);
1084	LOCK (wrklock);
1085	--started;
1086	UNLOCK (wrklock);
1087	goto quit;
1088	}
1089
1090	/* we are allowed to idle, so do so without any timeout */
1091	pthread_cond_wait (&reqwait, &reqlock);
1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1093	}
1094
1095	--idle;
1096	}
1097
1098	--nready;
1099
1100	UNLOCK (reqlock);
1101
1102	errno = 0; /* strictly unnecessary */
1103
1104	if (!(req->flags & FLAG_CANCELLED))
1105	switch (req->type)
1106	{
1107	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1108	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1109
1110	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1111	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1112
1113	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1114	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1115	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1116
1117	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1118	case REQ_CLOSE: req->result = close (req->int1); break;
1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1123	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1124	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1125	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1126
1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1128	case REQ_FSYNC: req->result = fsync (req->int1); break;
1129	case REQ_READDIR: scandir_ (req, self); break;
1130
1131	case REQ_BUSY:
1132	{
1133	struct timeval tv;
1134
1135	tv.tv_sec = req->int1;
1136	tv.tv_usec = req->int2;
1137
1138	req->result = select (0, 0, 0, 0, &tv);
1139	}
1140
1141	case REQ_GROUP:
1142	case REQ_NOP:
1143	break;
1144
1145	case REQ_QUIT:
1146	goto quit;
1147
1148	default:
1149	req->result = ENOSYS;
1150	break;
1151	}
1152
1153	req->errorno = errno;
1154
1155	LOCK (reslock);
1156
1157	++npending;
1158
1159	if (!reqq_push (&res_queue, req))
1160	/* write a dummy byte to the pipe so fh becomes ready */
1161	write (respipe [1], &respipe, 1);
1162
1163	self->req = 0;
1164	worker_clear (self);
1165
1166	UNLOCK (reslock);
1167	}
1168
1169	quit:
1170	LOCK (wrklock);
1171	worker_free (self);
1172	UNLOCK (wrklock);
1173
1174	return 0;
1175	}
1176
1177	/*****************************************************************************/
1178
1179	static void atfork_prepare (void)
1180	{
1181	LOCK (wrklock);
1182	LOCK (reqlock);
1183	LOCK (reslock);
1184	#if !HAVE_PREADWRITE
1185	LOCK (preadwritelock);
1186	#endif
1187	#if !HAVE_READDIR_R
1188	LOCK (readdirlock);
1189	#endif
1190	}
1191
1192	static void atfork_parent (void)
1193	{
1194	#if !HAVE_READDIR_R
1195	UNLOCK (readdirlock);
1196	#endif
1197	#if !HAVE_PREADWRITE
1198	UNLOCK (preadwritelock);
1199	#endif
1200	UNLOCK (reslock);
1201	UNLOCK (reqlock);
1202	UNLOCK (wrklock);
1203	}
1204
1205	static void atfork_child (void)
1206	{
1207	aio_req prv;
1208
1209	while (prv = reqq_shift (&req_queue))
1210	req_free (prv);
1211
1212	while (prv = reqq_shift (&res_queue))
1213	req_free (prv);
1214
1215	while (wrk_first.next != &wrk_first)
1216	{
1217	worker *wrk = wrk_first.next;
1218
1219	if (wrk->req)
1220	req_free (wrk->req);
1221
1222	worker_clear (wrk);
1223	worker_free (wrk);
1224	}
1225
1226	started = 0;
1227	idle = 0;
1228	nreqs = 0;
1229	nready = 0;
1230	npending = 0;
1231
1232	close (respipe [0]);
1233	close (respipe [1]);
1234	create_pipe ();
1235
1236	atfork_parent ();
1237	}	722	}
1238		723
1239	#define dREQ \	724	#define dREQ \
		725	SV *cb_cv; \
1240	aio_req req; \	726	aio_req req; \
1241	int req_pri = next_pri; \	727	int req_pri = next_pri; \
1242	next_pri = DEFAULT_PRI + PRI_BIAS; \	728	next_pri = EIO_PRI_DEFAULT; \
1243	\	729	\
1244	if (SvOK (callback) && !SvROK (callback)) \	730	cb_cv = get_cb (callback); \
1245	croak ("callback must be undef or of reference type"); \
1246	\	731	\
1247	Newz (0, req, 1, aio_cb); \	732	Newz (0, req, 1, eio_req); \
1248	if (!req) \	733	if (!req) \
1249	croak ("out of memory during aio_req allocation"); \	734	croak ("out of memory during eio_req allocation"); \
1250	\	735	\
1251	req->callback = newSVsv (callback); \	736	req->callback = SvREFCNT_inc (cb_cv); \
1252	req->pri = req_pri	737	req->pri = req_pri
1253		738
1254	#define REQ_SEND \	739	#define REQ_SEND \
		740	PUTBACK; \
1255	req_send (req); \	741	req_submit (req); \
		742	SPAGAIN; \
1256	\	743	\
1257	if (GIMME_V != G_VOID) \	744	if (GIMME_V != G_VOID) \
1258	XPUSHs (req_sv (req, AIO_REQ_KLASS));	745	XPUSHs (req_sv (req, aio_req_stash));
1259		746
1260	MODULE = IO::AIO PACKAGE = IO::AIO	747	MODULE = IO::AIO PACKAGE = IO::AIO
1261		748
1262	PROTOTYPES: ENABLE	749	PROTOTYPES: ENABLE
1263		750
1264	BOOT:	751	BOOT:
1265	{	752	{
		753	static const struct {
		754	const char *name;
		755	IV iv;
		756	} *civ, const_iv[] = {
		757	# define const_niv(name, value) { # name, (IV) value },
		758	# define const_iv(name) { # name, (IV) name },
		759	# define const_eio(name) { # name, (IV) EIO_ ## name },
		760	const_iv (EXDEV)
		761	const_iv (ENOSYS)
		762	const_iv (O_RDONLY)
		763	const_iv (O_WRONLY)
		764	const_iv (O_RDWR)
		765	const_iv (O_CREAT)
		766	const_iv (O_TRUNC)
		767	const_iv (O_EXCL)
		768	const_iv (O_APPEND)
		769
		770	const_iv (S_IFIFO)
		771	const_iv (S_IFCHR)
		772	const_iv (S_IFBLK)
		773	const_iv (S_IFLNK)
		774	const_iv (S_IFREG)
		775	const_iv (S_IFDIR)
		776	const_iv (S_IFWHT)
		777	const_iv (S_IFSOCK)
		778	const_iv (S_IFMT)
		779
		780	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		781	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		782	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		783	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		784	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		785	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		786
		787	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		788	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		789	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		790	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		791	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		792
		793	const_iv (ST_RDONLY)
		794	const_iv (ST_NOSUID)
		795	const_iv (ST_NODEV)
		796	const_iv (ST_NOEXEC)
		797	const_iv (ST_SYNCHRONOUS)
		798	const_iv (ST_MANDLOCK)
		799	const_iv (ST_WRITE)
		800	const_iv (ST_APPEND)
		801	const_iv (ST_IMMUTABLE)
		802	const_iv (ST_NOATIME)
		803	const_iv (ST_NODIRATIME)
		804	const_iv (ST_RELATIME)
		805
		806	const_iv (PROT_NONE)
		807	const_iv (PROT_EXEC)
		808	const_iv (PROT_READ)
		809	const_iv (PROT_WRITE)
		810
		811	/*const_iv (MAP_FIXED)*/
		812	const_iv (MAP_PRIVATE)
		813	const_iv (MAP_SHARED)
		814	const_iv (MAP_ANONYMOUS)
		815
		816	/* linuxish */
		817	const_iv (MAP_HUGETLB)
		818	const_iv (MAP_LOCKED)
		819	const_iv (MAP_NORESERVE)
		820	const_iv (MAP_POPULATE)
		821	const_iv (MAP_NONBLOCK)
		822
		823	const_eio (MCL_FUTURE)
		824	const_eio (MCL_CURRENT)
		825
		826	const_eio (MS_ASYNC)
		827	const_eio (MS_INVALIDATE)
		828	const_eio (MS_SYNC)
		829
		830	const_eio (MT_MODIFY)
		831
		832	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		833	const_eio (SYNC_FILE_RANGE_WRITE)
		834	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		835
		836	const_eio (READDIR_DENTS)
		837	const_eio (READDIR_DIRS_FIRST)
		838	const_eio (READDIR_STAT_ORDER)
		839	const_eio (READDIR_FOUND_UNKNOWN)
		840
		841	const_eio (DT_UNKNOWN)
		842	const_eio (DT_FIFO)
		843	const_eio (DT_CHR)
		844	const_eio (DT_DIR)
		845	const_eio (DT_BLK)
		846	const_eio (DT_REG)
		847	const_eio (DT_LNK)
		848	const_eio (DT_SOCK)
		849	const_eio (DT_WHT)
		850	};
		851
1266	HV *stash = gv_stashpv ("IO::AIO", 1);	852	aio_stash = gv_stashpv ("IO::AIO" , 1);
		853	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		854	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1267		855
1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	856	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	857	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1270	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1271	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1272	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1273	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1274		858
		859	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		860
1275	create_pipe ();	861	create_respipe ();
1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1277	}
1278		862
		863	if (eio_init (want_poll, done_poll) < 0)
		864	croak ("IO::AIO: unable to initialise eio library");
		865
		866	/* atfork child called in fifo order, so before eio's handler */
		867	X_THREAD_ATFORK (0, 0, atfork_child);
		868	}
		869
1279	void	870	void
1280	max_poll_reqs (int nreqs)	871	max_poll_reqs (unsigned int nreqs)
1281	PROTOTYPE: $	872	PROTOTYPE: $
1282	CODE:	873	CODE:
1283	max_poll_reqs = nreqs;	874	eio_set_max_poll_reqs (nreqs);
1284		875
1285	void	876	void
1286	max_poll_time (double nseconds)	877	max_poll_time (double nseconds)
1287	PROTOTYPE: $	878	PROTOTYPE: $
1288	CODE:	879	CODE:
1289	max_poll_time = nseconds * AIO_TICKS;	880	eio_set_max_poll_time (nseconds);
1290		881
1291	void	882	void
1292	min_parallel (int nthreads)	883	min_parallel (unsigned int nthreads)
1293	PROTOTYPE: $
1294
1295	void
1296	max_parallel (int nthreads)
1297	PROTOTYPE: $
1298
1299	void
1300	max_idle (int nthreads)
1301	PROTOTYPE: $	884	PROTOTYPE: $
1302	CODE:	885	CODE:
1303	set_max_idle (nthreads);	886	eio_set_min_parallel (nthreads);
1304		887
1305	int	888	void
1306	max_outstanding (int maxreqs)	889	max_parallel (unsigned int nthreads)
1307	PROTOTYPE: $	890	PROTOTYPE: $
1308	CODE:	891	CODE:
1309	RETVAL = max_outstanding;	892	eio_set_max_parallel (nthreads);
		893
		894	void
		895	max_idle (unsigned int nthreads)
		896	PROTOTYPE: $
		897	CODE:
		898	eio_set_max_idle (nthreads);
		899
		900	void
		901	idle_timeout (unsigned int seconds)
		902	PROTOTYPE: $
		903	CODE:
		904	eio_set_idle_timeout (seconds);
		905
		906	void
		907	max_outstanding (unsigned int maxreqs)
		908	PROTOTYPE: $
		909	CODE:
1310	max_outstanding = maxreqs;	910	max_outstanding = maxreqs;
1311	OUTPUT:
1312	RETVAL
1313		911
1314	void	912	void
1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	913	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1316	SV8 * pathname
1317	int flags
1318	int mode
1319	SV * callback
1320	PROTOTYPE: $$$;$
1321	PPCODE:	914	PPCODE:
1322	{	915	{
1323	dREQ;	916	dREQ;
1324		917
1325	req->type = REQ_OPEN;	918	req->type = EIO_OPEN;
1326	req->sv1 = newSVsv (pathname);	919	req->sv1 = newSVsv (pathname);
1327	req->ptr1 = SvPVbyte_nolen (req->sv1);	920	req->ptr1 = SvPVbyte_nolen (req->sv1);
1328	req->int1 = flags;	921	req->int1 = flags;
1329	req->mode = mode;	922	req->int2 = mode;
1330		923
1331	REQ_SEND;	924	REQ_SEND;
1332	}	925	}
1333		926
1334	void	927	void
1335	aio_close (fh,callback=&PL_sv_undef)	928	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1336	SV * fh
1337	SV * callback
1338	PROTOTYPE: $;$
1339	ALIAS:	929	ALIAS:
1340	aio_close = REQ_CLOSE
1341	aio_fsync = REQ_FSYNC	930	aio_fsync = EIO_FSYNC
1342	aio_fdatasync = REQ_FDATASYNC	931	aio_fdatasync = EIO_FDATASYNC
1343	PPCODE:	932	PPCODE:
1344	{	933	{
		934	int fd = s_fileno_croak (fh, 0);
1345	dREQ;	935	dREQ;
1346		936
1347	req->type = ix;	937	req->type = ix;
1348	req->fh = newSVsv (fh);	938	req->sv1 = newSVsv (fh);
1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	939	req->int1 = fd;
1350		940
1351	REQ_SEND (req);	941	REQ_SEND (req);
1352	}	942	}
1353		943
1354	void	944	void
		945	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		946	PPCODE:
		947	{
		948	int fd = s_fileno_croak (fh, 0);
		949	dREQ;
		950
		951	req->type = EIO_SYNC_FILE_RANGE;
		952	req->sv1 = newSVsv (fh);
		953	req->int1 = fd;
		954	req->offs = offset;
		955	req->size = nbytes;
		956	req->int2 = flags;
		957
		958	REQ_SEND (req);
		959	}
		960
		961	void
		962	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		963	PPCODE:
		964	{
		965	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		966	int fd = s_fileno_croak (fh, 0);
		967	dREQ;
		968
		969	if (close_pipe < 0)
		970	{
		971	int pipefd [2];
		972
		973	if (pipe (pipefd) < 0
		974	|| close (pipefd [1]) < 0
		975	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		976	abort (); /*D*/
		977
		978	close_pipe = pipefd [0];
		979	}
		980
		981	req->type = EIO_DUP2;
		982	req->int1 = close_pipe;
		983	req->sv2 = newSVsv (fh);
		984	req->int2 = fd;
		985
		986	REQ_SEND (req);
		987	}
		988
		989	void
1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	990	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1356	SV * fh
1357	UV offset
1358	UV length
1359	SV8 * data
1360	UV dataoffset
1361	SV * callback
1362	ALIAS:	991	ALIAS:
1363	aio_read = REQ_READ	992	aio_read = EIO_READ
1364	aio_write = REQ_WRITE	993	aio_write = EIO_WRITE
1365	PROTOTYPE: $$$$$;$
1366	PPCODE:	994	PPCODE:
1367	{	995	{
1368	STRLEN svlen;	996	STRLEN svlen;
		997	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1369	char *svptr = SvPVbyte (data, svlen);	998	char *svptr = SvPVbyte (data, svlen);
1370		999	UV len = SvUV (length);
1371	SvUPGRADE (data, SVt_PV);
1372	SvPOK_on (data);
1373		1000
1374	if (dataoffset < 0)	1001	if (dataoffset < 0)
1375	dataoffset += svlen;	1002	dataoffset += svlen;
1376		1003
1377	if (dataoffset < 0 || dataoffset > svlen)	1004	if (dataoffset < 0 || dataoffset > svlen)
1378	croak ("data offset outside of string");	1005	croak ("dataoffset outside of data scalar");
1379		1006
1380	if (ix == REQ_WRITE)	1007	if (ix == EIO_WRITE)
1381	{	1008	{
1382	/* write: check length and adjust. */	1009	/* write: check length and adjust. */
1383	if (length < 0 || length + dataoffset > svlen)	1010	if (!SvOK (length) || len + dataoffset > svlen)
1384	length = svlen - dataoffset;	1011	len = svlen - dataoffset;
1385	}	1012	}
1386	else	1013	else
1387	{	1014	{
1388	/* read: grow scalar as necessary */	1015	/* read: check type and grow scalar as necessary */
		1016	SvUPGRADE (data, SVt_PV);
1389	svptr = SvGROW (data, length + dataoffset);	1017	svptr = SvGROW (data, len + dataoffset + 1);
1390	}	1018	}
1391
1392	if (length < 0)
1393	croak ("length must not be negative");
1394		1019
1395	{	1020	{
1396	dREQ;	1021	dREQ;
1397		1022
1398	req->type = ix;	1023	req->type = ix;
1399	req->fh = newSVsv (fh);	1024	req->sv1 = newSVsv (fh);
1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1025	req->int1 = fd;
1401	: IoOFP (sv_2io (fh)));	1026	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1402	req->offs = offset;
1403	req->size = length;	1027	req->size = len;
1404	req->sv1 = SvREFCNT_inc (data);	1028	req->sv2 = SvREFCNT_inc (data);
1405	req->ptr1 = (char *)svptr + dataoffset;	1029	req->ptr2 = (char *)svptr + dataoffset;
1406	req->stroffset = dataoffset;	1030	req->stroffset = dataoffset;
1407		1031
1408	if (!SvREADONLY (data))	1032	if (!SvREADONLY (data))
1409	{	1033	{
1410	SvREADONLY_on (data);	1034	SvREADONLY_on (data);
1411	req->flags |= FLAG_SV1_RO_OFF;	1035	req->flags |= FLAG_SV2_RO_OFF;
1412	}	1036	}
1413		1037
1414	REQ_SEND;	1038	REQ_SEND;
1415	}	1039	}
1416	}	1040	}
1417		1041
1418	void	1042	void
1419	aio_readlink (path,callback=&PL_sv_undef)	1043	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1420	SV8 * path
1421	SV * callback
1422	PROTOTYPE: $$;$
1423	PPCODE:	1044	PPCODE:
1424	{	1045	{
1425	SV *data;	1046	SV *data;
1426	dREQ;	1047	dREQ;
1427		1048
1428	data = newSV (NAME_MAX);
1429	SvPOK_on (data);
1430
1431	req->type = REQ_READLINK;	1049	req->type = EIO_READLINK;
1432	req->fh = newSVsv (path);	1050	req->sv1 = newSVsv (path);
1433	req->ptr2 = SvPVbyte_nolen (req->fh);	1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
1434	req->sv1 = data;
1435	req->ptr1 = SvPVbyte_nolen (data);
1436		1052
1437	REQ_SEND;	1053	REQ_SEND;
1438	}	1054	}
1439		1055
1440	void	1056	void
1441	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1057	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1442	SV * out_fh
1443	SV * in_fh
1444	UV in_offset
1445	UV length
1446	SV * callback
1447	PROTOTYPE: $$$$;$
1448	PPCODE:	1058	PPCODE:
1449	{	1059	{
		1060	int ifd = s_fileno_croak (in_fh , 0);
		1061	int ofd = s_fileno_croak (out_fh, 1);
1450	dREQ;	1062	dREQ;
1451		1063
1452	req->type = REQ_SENDFILE;	1064	req->type = EIO_SENDFILE;
1453	req->fh = newSVsv (out_fh);	1065	req->sv1 = newSVsv (out_fh);
1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1066	req->int1 = ofd;
1455	req->sv2 = newSVsv (in_fh);	1067	req->sv2 = newSVsv (in_fh);
1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1068	req->int2 = ifd;
1457	req->offs = in_offset;	1069	req->offs = in_offset;
1458	req->size = length;	1070	req->size = length;
1459		1071
1460	REQ_SEND;	1072	REQ_SEND;
1461	}	1073	}
1462		1074
1463	void	1075	void
1464	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1076	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1465	SV * fh
1466	UV offset
1467	IV length
1468	SV * callback
1469	PROTOTYPE: $$$;$
1470	PPCODE:	1077	PPCODE:
1471	{	1078	{
		1079	int fd = s_fileno_croak (fh, 0);
1472	dREQ;	1080	dREQ;
1473		1081
1474	req->type = REQ_READAHEAD;	1082	req->type = EIO_READAHEAD;
1475	req->fh = newSVsv (fh);	1083	req->sv1 = newSVsv (fh);
1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1084	req->int1 = fd;
1477	req->offs = offset;	1085	req->offs = offset;
1478	req->size = length;	1086	req->size = length;
1479		1087
1480	REQ_SEND;	1088	REQ_SEND;
1481	}	1089	}
1482		1090
1483	void	1091	void
1484	aio_stat (fh_or_path,callback=&PL_sv_undef)	1092	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1485	SV8 * fh_or_path
1486	SV * callback
1487	ALIAS:	1093	ALIAS:
1488	aio_stat = REQ_STAT	1094	aio_stat = EIO_STAT
1489	aio_lstat = REQ_LSTAT	1095	aio_lstat = EIO_LSTAT
		1096	aio_statvfs = EIO_STATVFS
1490	PPCODE:	1097	PPCODE:
1491	{	1098	{
1492	dREQ;	1099	dREQ;
1493		1100
1494	req->ptr2 = malloc (sizeof (Stat_t));	1101	req->sv1 = newSVsv (fh_or_path);
1495	if (!req->ptr2)
1496	{
1497	req_free (req);
1498	croak ("out of memory during aio_stat statdata allocation");
1499	}
1500		1102
1501	req->flags |= FLAG_PTR2_FREE;	1103	if (SvPOK (req->sv1))
1502
1503	if (SvPOK (fh_or_path))
1504	{	1104	{
1505	req->type = ix;	1105	req->type = ix;
1506	req->sv1 = newSVsv (fh_or_path);
1507	req->ptr1 = SvPVbyte_nolen (req->sv1);	1106	req->ptr1 = SvPVbyte_nolen (req->sv1);
1508	}	1107	}
1509	else	1108	else
1510	{	1109	{
1511	req->type = REQ_FSTAT;	1110	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1512	req->fh = newSVsv (fh_or_path);
1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1111	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1514	}	1112	}
1515		1113
1516	REQ_SEND;	1114	REQ_SEND;
1517	}	1115	}
1518		1116
		1117	UV
		1118	major (UV dev)
		1119	ALIAS:
		1120	minor = 1
		1121	CODE:
		1122	RETVAL = ix ? major (dev) : minor (dev);
		1123	OUTPUT:
		1124	RETVAL
		1125
		1126	UV
		1127	makedev (UV maj, UV min)
		1128	CODE:
		1129	RETVAL = makedev (maj, min);
		1130	OUTPUT:
		1131	RETVAL
		1132
1519	void	1133	void
		1134	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1135	PPCODE:
		1136	{
		1137	dREQ;
		1138
		1139	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1140	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1141	req->sv1 = newSVsv (fh_or_path);
		1142
		1143	if (SvPOK (req->sv1))
		1144	{
		1145	req->type = EIO_UTIME;
		1146	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1147	}
		1148	else
		1149	{
		1150	req->type = EIO_FUTIME;
		1151	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1152	}
		1153
		1154	REQ_SEND;
		1155	}
		1156
		1157	void
		1158	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1159	PPCODE:
		1160	{
		1161	dREQ;
		1162
		1163	req->sv1 = newSVsv (fh_or_path);
		1164	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1165
		1166	if (SvPOK (req->sv1))
		1167	{
		1168	req->type = EIO_TRUNCATE;
		1169	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1170	}
		1171	else
		1172	{
		1173	req->type = EIO_FTRUNCATE;
		1174	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1175	}
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1182	ALIAS:
		1183	aio_chmod = EIO_CHMOD
		1184	aio_mkdir = EIO_MKDIR
		1185	PPCODE:
		1186	{
		1187	dREQ;
		1188
		1189	req->int2 = mode;
		1190	req->sv1 = newSVsv (fh_or_path);
		1191
		1192	if (SvPOK (req->sv1))
		1193	{
		1194	req->type = ix;
		1195	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1196	}
		1197	else
		1198	{
		1199	req->type = EIO_FCHMOD;
		1200	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1201	}
		1202
		1203	REQ_SEND;
		1204	}
		1205
		1206	void
		1207	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1208	PPCODE:
		1209	{
		1210	dREQ;
		1211
		1212	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1213	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1214	req->sv1 = newSVsv (fh_or_path);
		1215
		1216	if (SvPOK (req->sv1))
		1217	{
		1218	req->type = EIO_CHOWN;
		1219	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1220	}
		1221	else
		1222	{
		1223	req->type = EIO_FCHOWN;
		1224	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1225	}
		1226
		1227	REQ_SEND;
		1228	}
		1229
		1230	void
		1231	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1232	PPCODE:
		1233	{
		1234	dREQ;
		1235
		1236	req->type = EIO_READDIR;
		1237	req->sv1 = newSVsv (pathname);
		1238	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1239	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1240
		1241	if (flags & EIO_READDIR_DENTS)
		1242	req->int1 |= EIO_READDIR_CUSTOM2;
		1243
		1244	REQ_SEND;
		1245	}
		1246
		1247	void
1520	aio_unlink (pathname,callback=&PL_sv_undef)	1248	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1521	SV8 * pathname
1522	SV * callback
1523	ALIAS:	1249	ALIAS:
1524	aio_unlink = REQ_UNLINK	1250	aio_unlink = EIO_UNLINK
1525	aio_rmdir = REQ_RMDIR	1251	aio_rmdir = EIO_RMDIR
1526	aio_readdir = REQ_READDIR	1252	aio_readdir = EIO_READDIR
1527	PPCODE:	1253	PPCODE:
1528	{	1254	{
1529	dREQ;	1255	dREQ;
1530		1256
1531	req->type = ix;	1257	req->type = ix;
…		…
1534		1260
1535	REQ_SEND;	1261	REQ_SEND;
1536	}	1262	}
1537		1263
1538	void	1264	void
1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1265	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1540	SV8 * oldpath
1541	SV8 * newpath
1542	SV * callback
1543	ALIAS:	1266	ALIAS:
1544	aio_link = REQ_LINK	1267	aio_link = EIO_LINK
1545	aio_symlink = REQ_SYMLINK	1268	aio_symlink = EIO_SYMLINK
1546	aio_rename = REQ_RENAME	1269	aio_rename = EIO_RENAME
1547	PPCODE:	1270	PPCODE:
1548	{	1271	{
1549	dREQ;	1272	dREQ;
1550		1273
1551	req->type = ix;	1274	req->type = ix;
1552	req->fh = newSVsv (oldpath);	1275	req->sv1 = newSVsv (oldpath);
1553	req->ptr2 = SvPVbyte_nolen (req->fh);
1554	req->sv1 = newSVsv (newpath);
1555	req->ptr1 = SvPVbyte_nolen (req->sv1);	1276	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1277	req->sv2 = newSVsv (newpath);
		1278	req->ptr2 = SvPVbyte_nolen (req->sv2);
1556		1279
1557	REQ_SEND;	1280	REQ_SEND;
1558	}	1281	}
1559		1282
1560	void	1283	void
1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1284	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1562	SV8 * pathname
1563	SV * callback
1564	UV mode
1565	UV dev
1566	PPCODE:	1285	PPCODE:
1567	{	1286	{
1568	dREQ;	1287	dREQ;
1569		1288
1570	req->type = REQ_MKNOD;	1289	req->type = EIO_MKNOD;
1571	req->sv1 = newSVsv (pathname);	1290	req->sv1 = newSVsv (pathname);
1572	req->ptr1 = SvPVbyte_nolen (req->sv1);	1291	req->ptr1 = SvPVbyte_nolen (req->sv1);
1573	req->mode = (mode_t)mode;	1292	req->int2 = (mode_t)mode;
1574	req->offs = dev;	1293	req->offs = dev;
1575		1294
1576	REQ_SEND;	1295	REQ_SEND;
1577	}	1296	}
1578		1297
1579	void	1298	void
		1299	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1300	ALIAS:
		1301	aio_mtouch = EIO_MTOUCH
		1302	aio_msync = EIO_MSYNC
		1303	PPCODE:
		1304	{
		1305	STRLEN svlen;
		1306	char *svptr = SvPVbyte (data, svlen);
		1307	UV len = SvUV (length);
		1308
		1309	if (offset < 0)
		1310	offset += svlen;
		1311
		1312	if (offset < 0 || offset > svlen)
		1313	croak ("offset outside of scalar");
		1314
		1315	if (!SvOK (length) || len + offset > svlen)
		1316	len = svlen - offset;
		1317
		1318	{
		1319	dREQ;
		1320
		1321	req->type = ix;
		1322	req->sv2 = SvREFCNT_inc (data);
		1323	req->ptr2 = (char *)svptr + offset;
		1324	req->size = len;
		1325	req->int1 = flags;
		1326
		1327	REQ_SEND;
		1328	}
		1329	}
		1330
		1331	void
		1332	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1333	PPCODE:
		1334	{
		1335	STRLEN svlen;
		1336	char *svptr = SvPVbyte (data, svlen);
		1337	UV len = SvUV (length);
		1338
		1339	if (offset < 0)
		1340	offset += svlen;
		1341
		1342	if (offset < 0 || offset > svlen)
		1343	croak ("offset outside of scalar");
		1344
		1345	if (!SvOK (length) || len + offset > svlen)
		1346	len = svlen - offset;
		1347
		1348	{
		1349	dREQ;
		1350
		1351	req->type = EIO_MLOCK;
		1352	req->sv2 = SvREFCNT_inc (data);
		1353	req->ptr2 = (char *)svptr + offset;
		1354	req->size = len;
		1355
		1356	REQ_SEND;
		1357	}
		1358	}
		1359
		1360	void
		1361	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1362	PPCODE:
		1363	{
		1364	dREQ;
		1365
		1366	req->type = EIO_MLOCKALL;
		1367	req->int1 = flags;
		1368
		1369	REQ_SEND;
		1370	}
		1371
		1372	void
1580	aio_busy (delay,callback=&PL_sv_undef)	1373	aio_busy (double delay, SV *callback=&PL_sv_undef)
1581	double delay
1582	SV * callback
1583	PPCODE:	1374	PPCODE:
1584	{	1375	{
1585	dREQ;	1376	dREQ;
1586		1377
1587	req->type = REQ_BUSY;	1378	req->type = EIO_BUSY;
1588	req->int1 = delay < 0. ? 0 : delay;	1379	req->nv1 = delay < 0. ? 0. : delay;
1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1590		1380
1591	REQ_SEND;	1381	REQ_SEND;
1592	}	1382	}
1593		1383
1594	void	1384	void
1595	aio_group (callback=&PL_sv_undef)	1385	aio_group (SV *callback=&PL_sv_undef)
1596	SV * callback
1597	PROTOTYPE: ;$
1598	PPCODE:	1386	PPCODE:
1599	{	1387	{
1600	dREQ;	1388	dREQ;
1601		1389
1602	req->type = REQ_GROUP;	1390	req->type = EIO_GROUP;
1603		1391
1604	req_send (req);	1392	req_submit (req);
1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1393	XPUSHs (req_sv (req, aio_grp_stash));
1606	}	1394	}
1607		1395
1608	void	1396	void
1609	aio_nop (callback=&PL_sv_undef)	1397	aio_nop (SV *callback=&PL_sv_undef)
1610	SV * callback	1398	ALIAS:
		1399	aio_nop = EIO_NOP
		1400	aio_sync = EIO_SYNC
1611	PPCODE:	1401	PPCODE:
1612	{	1402	{
1613	dREQ;	1403	dREQ;
1614		1404
1615	req->type = REQ_NOP;	1405	req->type = ix;
1616		1406
1617	REQ_SEND;	1407	REQ_SEND;
1618	}	1408	}
1619		1409
1620	int	1410	int
1621	aioreq_pri (int pri = 0)	1411	aioreq_pri (int pri = 0)
1622	PROTOTYPE: ;$
1623	CODE:	1412	CODE:
1624	RETVAL = next_pri - PRI_BIAS;	1413	RETVAL = next_pri;
1625	if (items > 0)	1414	if (items > 0)
1626	{	1415	{
1627	if (pri < PRI_MIN) pri = PRI_MIN;	1416	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1628	if (pri > PRI_MAX) pri = PRI_MAX;	1417	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1629	next_pri = pri + PRI_BIAS;	1418	next_pri = pri;
1630	}	1419	}
1631	OUTPUT:	1420	OUTPUT:
1632	RETVAL	1421	RETVAL
1633		1422
1634	void	1423	void
1635	aioreq_nice (int nice = 0)	1424	aioreq_nice (int nice = 0)
1636	CODE:	1425	CODE:
1637	nice = next_pri - nice;	1426	nice = next_pri - nice;
1638	if (nice < PRI_MIN) nice = PRI_MIN;	1427	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1639	if (nice > PRI_MAX) nice = PRI_MAX;	1428	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1640	next_pri = nice + PRI_BIAS;	1429	next_pri = nice;
1641		1430
1642	void	1431	void
1643	flush ()	1432	flush ()
1644	PROTOTYPE:
1645	CODE:	1433	CODE:
1646	while (nreqs)	1434	while (eio_nreqs ())
1647	{	1435	{
1648	poll_wait ();	1436	poll_wait ();
1649	poll_cb (0);	1437	poll_cb ();
1650	}	1438	}
1651		1439
1652	void
1653	poll()
1654	PROTOTYPE:
1655	CODE:
1656	if (nreqs)
1657	{
1658	poll_wait ();
1659	poll_cb (0);
1660	}
1661
1662	int	1440	int
1663	poll_fileno()	1441	poll ()
1664	PROTOTYPE:
1665	CODE:	1442	CODE:
1666	RETVAL = respipe [0];	1443	poll_wait ();
1667	OUTPUT:
1668	RETVAL
1669
1670	int
1671	poll_cb(...)
1672	PROTOTYPE:
1673	CODE:
1674	RETVAL = poll_cb ();	1444	RETVAL = poll_cb ();
1675	OUTPUT:	1445	OUTPUT:
1676	RETVAL	1446	RETVAL
1677		1447
1678	void
1679	poll_wait()
1680	PROTOTYPE:
1681	CODE:
1682	if (nreqs)
1683	poll_wait ();
1684
1685	int	1448	int
1686	nreqs()	1449	poll_fileno ()
1687	PROTOTYPE:
1688	CODE:	1450	CODE:
1689	RETVAL = nreqs;	1451	RETVAL = s_epipe_fd (&respipe);
1690	OUTPUT:	1452	OUTPUT:
1691	RETVAL	1453	RETVAL
1692		1454
1693	int	1455	int
1694	nready()	1456	poll_cb (...)
1695	PROTOTYPE:	1457	PROTOTYPE:
1696	CODE:	1458	CODE:
1697	RETVAL = get_nready ();	1459	RETVAL = poll_cb ();
1698	OUTPUT:	1460	OUTPUT:
1699	RETVAL	1461	RETVAL
1700		1462
		1463	void
		1464	poll_wait ()
		1465	CODE:
		1466	poll_wait ();
		1467
1701	int	1468	int
1702	npending()	1469	nreqs ()
1703	PROTOTYPE:
1704	CODE:	1470	CODE:
1705	RETVAL = get_npending ();	1471	RETVAL = eio_nreqs ();
1706	OUTPUT:	1472	OUTPUT:
1707	RETVAL	1473	RETVAL
1708		1474
1709	int	1475	int
1710	nthreads()	1476	nready ()
1711	PROTOTYPE:
1712	CODE:	1477	CODE:
1713	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1478	RETVAL = eio_nready ();
1714	RETVAL = started;
1715	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1716	OUTPUT:	1479	OUTPUT:
1717	RETVAL	1480	RETVAL
1718		1481
		1482	int
		1483	npending ()
		1484	CODE:
		1485	RETVAL = eio_npending ();
		1486	OUTPUT:
		1487	RETVAL
		1488
		1489	int
		1490	nthreads ()
		1491	CODE:
		1492	RETVAL = eio_nthreads ();
		1493	OUTPUT:
		1494	RETVAL
		1495
		1496	int
		1497	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1498	CODE:
		1499	RETVAL = posix_fadvise (fh, offset, length, advice);
		1500	OUTPUT:
		1501	RETVAL
		1502
		1503	ssize_t
		1504	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1505	CODE:
		1506	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	void
		1511	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1512	PPCODE:
		1513	sv_unmagic (scalar, MMAP_MAGIC);
		1514	{
		1515	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1516	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1517	if (addr == (void *)-1)
		1518	XSRETURN_NO;
		1519
		1520	sv_force_normal (scalar);
		1521
		1522	/* we store the length in mg_obj, as namlen is I32 :/ */
		1523	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1524	->mg_obj = (SV *)length;
		1525
		1526	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1527
		1528	if (!(prot & PROT_WRITE))
		1529	SvREADONLY_on (scalar);
		1530
		1531	if (SvLEN (scalar))
		1532	Safefree (SvPVX (scalar));
		1533
		1534	SvPVX (scalar) = (char *)addr;
		1535	SvCUR_set (scalar, length);
		1536	SvLEN_set (scalar, 0);
		1537	SvPOK_only (scalar);
		1538
		1539	XSRETURN_YES;
		1540	}
		1541
		1542	void
		1543	munmap (SV *scalar)
		1544	CODE:
		1545	sv_unmagic (scalar, MMAP_MAGIC);
		1546
		1547	int
		1548	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1549	ALIAS:
		1550	mprotect = 1
		1551	CODE:
		1552	{
		1553	STRLEN svlen;
		1554	void *addr = SvPVbyte (scalar, svlen);
		1555	size_t len = SvUV (length);
		1556
		1557	if (offset < 0)
		1558	offset += svlen;
		1559
		1560	if (offset < 0 || offset > svlen)
		1561	croak ("offset outside of scalar");
		1562
		1563	if (!SvOK (length) || len + offset > svlen)
		1564	len = svlen - offset;
		1565
		1566	addr = (void *)(((intptr_t)addr) + offset);
		1567	eio_page_align (&addr, &len);
		1568
		1569	switch (ix)
		1570	{
		1571	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1572	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1573	}
		1574	}
		1575	OUTPUT:
		1576	RETVAL
		1577
		1578	int
		1579	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1580	CODE:
		1581	{
		1582	STRLEN svlen;
		1583	void *addr = SvPVbyte (scalar, svlen);
		1584	size_t len = SvUV (length);
		1585
		1586	if (offset < 0)
		1587	offset += svlen;
		1588
		1589	if (offset < 0 || offset > svlen)
		1590	croak ("offset outside of scalar");
		1591
		1592	if (!SvOK (length) || len + offset > svlen)
		1593	len = svlen - offset;
		1594
		1595	addr = (void *)(((intptr_t)addr) + offset);
		1596	eio_page_align (&addr, &len);
		1597	#if _POSIX_MEMLOCK_RANGE
		1598	RETVAL = munlock (addr, len);
		1599	#else
		1600	RETVAL = ((errno = ENOSYS), -1);
		1601	#endif
		1602	}
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	int
		1607	munlockall ()
		1608	CODE:
		1609	#if _POSIX_MEMLOCK
		1610	munlockall ();
		1611	#else
		1612	RETVAL = -1;
		1613	errno = ENOSYS;
		1614	#endif
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	void _on_next_submit (SV *cb)
		1619	CODE:
		1620	SvREFCNT_dec (on_next_submit);
		1621	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1622
1719	PROTOTYPES: DISABLE	1623	PROTOTYPES: DISABLE
1720		1624
1721	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1625	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1722		1626
1723	void	1627	void
1724	cancel (aio_req_ornot req)	1628	cancel (aio_req_ornot req)
1725	CODE:	1629	CODE:
1726	req_cancel (req);	1630	eio_cancel (req);
1727		1631
1728	void	1632	void
1729	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1633	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1730	CODE:	1634	PPCODE:
		1635	{
		1636	if (GIMME_V != G_VOID)
		1637	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1638
		1639	if (items > 1)
		1640	{
		1641	SV *cb_cv =get_cb (callback);
		1642
1731	SvREFCNT_dec (req->callback);	1643	SvREFCNT_dec (req->callback);
1732	req->callback = newSVsv (callback);	1644	req->callback = SvREFCNT_inc (cb_cv);
		1645	}
		1646	}
1733		1647
1734	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1648	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1735		1649
1736	void	1650	void
1737	add (aio_req grp, ...)	1651	add (aio_req grp, ...)
1738	PPCODE:	1652	PPCODE:
1739	{	1653	{
1740	int i;	1654	int i;
1741	aio_req req;
1742		1655
1743	if (grp->int1 == 2)	1656	if (grp->int1 == 2)
1744	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1657	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1745		1658
1746	for (i = 1; i < items; ++i )	1659	for (i = 1; i < items; ++i )
1747	{	1660	{
		1661	aio_req req;
		1662
1748	if (GIMME_V != G_VOID)	1663	if (GIMME_V != G_VOID)
1749	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1664	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1750		1665
1751	req = SvAIO_REQ (ST (i));	1666	req = SvAIO_REQ (ST (i));
1752		1667
1753	if (req)	1668	if (req)
1754	{	1669	eio_grp_add (grp, req);
1755	++grp->size;
1756	req->grp = grp;
1757
1758	req->grp_prev = 0;
1759	req->grp_next = grp->grp_first;
1760
1761	if (grp->grp_first)
1762	grp->grp_first->grp_prev = req;
1763
1764	grp->grp_first = req;
1765	}
1766	}	1670	}
1767	}	1671	}
1768		1672
1769	void	1673	void
1770	cancel_subs (aio_req_ornot req)	1674	cancel_subs (aio_req_ornot req)
…		…
1779	AV *av;	1683	AV *av;
1780		1684
1781	grp->errorno = errno;	1685	grp->errorno = errno;
1782		1686
1783	av = newAV ();	1687	av = newAV ();
		1688	av_extend (av, items - 1);
1784		1689
1785	for (i = 1; i < items; ++i )	1690	for (i = 1; i < items; ++i )
1786	av_push (av, newSVsv (ST (i)));	1691	av_push (av, newSVsv (ST (i)));
1787		1692
1788	SvREFCNT_dec (grp->sv1);	1693	SvREFCNT_dec (grp->sv1);
…		…
1795	grp->errorno = errorno;	1700	grp->errorno = errorno;
1796		1701
1797	void	1702	void
1798	limit (aio_req grp, int limit)	1703	limit (aio_req grp, int limit)
1799	CODE:	1704	CODE:
1800	grp->int2 = limit;	1705	eio_grp_limit (grp, limit);
1801	aio_grp_feed (grp);
1802		1706
1803	void	1707	void
1804	feed (aio_req grp, SV *callback=&PL_sv_undef)	1708	feed (aio_req grp, SV *callback=&PL_sv_undef)
1805	CODE:	1709	CODE:
1806	{	1710	{
1807	SvREFCNT_dec (grp->sv2);	1711	SvREFCNT_dec (grp->sv2);
1808	grp->sv2 = newSVsv (callback);	1712	grp->sv2 = newSVsv (callback);
		1713	grp->feed = aio_grp_feed;
1809		1714
1810	if (grp->int2 <= 0)	1715	if (grp->int2 <= 0)
1811	grp->int2 = 2;	1716	grp->int2 = 2;
1812		1717
1813	aio_grp_feed (grp);	1718	eio_grp_limit (grp, grp->int2);
1814	}	1719	}
1815		1720

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