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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.85 by root, Sat Oct 28 23:32:29 2006 UTC vs.
Revision 1.182 by root, Thu May 19 22:57:04 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>
		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	/* Linux/others */
		127	#ifndef O_ASYNC
		128	# define O_ASYNC 0
		129	#endif
		130	#ifndef O_DIRECT
		131	# define O_DIRECT 0
		132	#endif
		133	#ifndef O_NOATIME
		134	# define O_NOATIME 0
		135	#endif
		136
		137	/* POSIX */
		138	#ifndef O_CLOEXEC
		139	# define O_CLOEXEC 0
		140	#endif
		141	#ifndef O_NOFOLLOW
		142	# define O_NOFOLLOW 0
		143	#endif
		144	#ifndef O_NOCTTY
		145	# define O_NOCTTY 0
		146	#endif
		147	#ifndef O_NONBLOCK
		148	# define O_NONBLOCK 0
		149	#endif
		150	#ifndef O_EXEC
		151	# define O_EXEC 0
		152	#endif
		153	#ifndef O_SEARCH
		154	# define O_SEARCH 0
		155	#endif
		156	#ifndef O_DIRECTORY
		157	# define O_DIRECTORY 0
		158	#endif
		159	#ifndef O_DSYNC
		160	# define O_DSYNC 0
		161	#endif
		162	#ifndef O_RSYNC
		163	# define O_RSYNC 0
		164	#endif
		165	#ifndef O_SYNC
		166	# define O_SYNC 0
		167	#endif
		168	#ifndef O_TTY_INIT
		169	# define O_TTY_INIT 0
		170	#endif
		171
		172	#ifndef POSIX_FADV_NORMAL
		173	# define POSIX_FADV_NORMAL 0
		174	#endif
		175	#ifndef POSIX_FADV_SEQUENTIAL
		176	# define POSIX_FADV_SEQUENTIAL 0
		177	#endif
		178	#ifndef POSIX_FADV_RANDOM
		179	# define POSIX_FADV_RANDOM 0
		180	#endif
		181	#ifndef POSIX_FADV_NOREUSE
		182	# define POSIX_FADV_NOREUSE 0
		183	#endif
		184	#ifndef POSIX_FADV_WILLNEED
		185	# define POSIX_FADV_WILLNEED 0
		186	#endif
		187	#ifndef POSIX_FADV_DONTNEED
		188	# define POSIX_FADV_DONTNEED 0
		189	#endif
		190
		191	#if !HAVE_POSIX_FADVISE
		192	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		193	#endif
		194
		195	#ifndef POSIX_MADV_NORMAL
		196	# define POSIX_MADV_NORMAL 0
		197	#endif
		198	#ifndef POSIX_MADV_SEQUENTIAL
		199	# define POSIX_MADV_SEQUENTIAL 0
		200	#endif
		201	#ifndef POSIX_MADV_RANDOM
		202	# define POSIX_MADV_RANDOM 0
		203	#endif
		204	#ifndef POSIX_MADV_WILLNEED
		205	# define POSIX_MADV_WILLNEED 0
		206	#endif
		207	#ifndef POSIX_MADV_DONTNEED
		208	# define POSIX_MADV_DONTNEED 0
		209	#endif
		210
		211	#if !HAVE_POSIX_MADVISE
		212	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		213	#endif
		214
		215	#ifndef PROT_NONE
		216	# define PROT_NONE 0
		217	#endif
		218	#ifndef PROT_READ
		219	# define PROT_READ 0
		220	#endif
		221	#ifndef PROT_WRITE
		222	# define PROT_READ 0
		223	#endif
		224	#ifndef PROT_EXEC
		225	# define PROT_EXEC 0
		226	#endif
		227
		228	#ifndef ST_NODEV
		229	# define ST_NODEV 0
		230	#endif
		231	#ifndef ST_NOEXEC
		232	# define ST_NOEXEC 0
		233	#endif
		234	#ifndef ST_SYNCHRONOUS
		235	# define ST_SYNCHRONOUS 0
		236	#endif
		237	#ifndef ST_MANDLOCK
		238	# define ST_MANDLOCK 0
		239	#endif
		240	#ifndef ST_WRITE
		241	# define ST_WRITE 0
		242	#endif
		243	#ifndef ST_APPEND
		244	# define ST_APPEND 0
		245	#endif
		246	#ifndef ST_IMMUTABLE
		247	# define ST_IMMUTABLE 0
		248	#endif
		249	#ifndef ST_NOATIME
		250	# define ST_NOATIME 0
		251	#endif
		252	#ifndef ST_NODIRATIME
		253	# define ST_NODIRATIME 0
		254	#endif
		255	#ifndef ST_RELATIME
		256	# define ST_RELATIME 0
		257	#endif
		258
		259	#ifndef S_IFIFO
		260	# define S_IFIFO 0
		261	#endif
		262	#ifndef S_IFCHR
		263	# define S_IFCHR 0
		264	#endif
		265	#ifndef S_IFBLK
		266	# define S_IFBLK 0
		267	#endif
		268	#ifndef S_IFLNK
		269	# define S_IFLNK 0
		270	#endif
		271	#ifndef S_IFREG
		272	# define S_IFREG 0
		273	#endif
		274	#ifndef S_IFDIR
		275	# define S_IFDIR 0
		276	#endif
		277	#ifndef S_IFWHT
		278	# define S_IFWHT 0
		279	#endif
		280	#ifndef S_IFSOCK
		281	# define S_IFSOCK 0
		282	#endif
		283
		284	#ifndef MAP_ANONYMOUS
		285	# ifdef MAP_ANON
		286	# define MAP_ANONYMOUS MAP_ANON
43	# else	287	# else
44	# error sendfile support requested but not available	288	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	289	# endif
46	#endif	290	#endif
47		291	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	292	# 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	293	#endif
		294	#ifndef MAP_LOCKED
		295	# define MAP_LOCKED 0
79	#endif	296	#endif
		297	#ifndef MAP_NORESERVE
		298	# define MAP_NORESERVE 0
		299	#endif
		300	#ifndef MAP_POPULATE
		301	# define MAP_POPULATE 0
		302	#endif
		303	#ifndef MAP_NONBLOCK
		304	# define MAP_NONBLOCK 0
		305	#endif
80		306
81	/* buffer size for various temporary buffers */	307	#ifndef makedev
82	#define AIO_BUFSIZE 65536	308	# define makedev(maj,min) (((maj) << 8) | (min))
		309	#endif
		310	#ifndef major
		311	# define major(dev) ((dev) >> 8)
		312	#endif
		313	#ifndef minor
		314	# define minor(dev) ((dev) & 0xff)
		315	#endif
83		316
84	#define dBUF \	317	#ifndef PAGESIZE
85	char *aio_buf; \	318	# define PAGESIZE sysconf (_SC_PAGESIZE)
86	LOCK (wrklock); \	319	#endif
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	320
88	UNLOCK (wrklock); \	321	static int req_invoke (eio_req *req);
89	if (!aio_buf) \	322	#define EIO_FINISH(req) req_invoke (req)
90	return -1;	323	static void req_destroy (eio_req *grp);
		324	#define EIO_DESTROY(req) req_destroy (req)
91		325
92	enum {	326	enum {
93	REQ_QUIT,	327	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	328	};
105		329
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	330	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		331
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;
114	SV *fh, *fh2;
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;
122	int type;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	};
137
138	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	333	typedef eio_req *aio_req_ornot;
140		334
141	enum {	335	static SV *on_next_submit;
142	PRI_MIN = -4,	336	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	337	static int max_outstanding;
144		338
145	DEFAULT_PRI = 0,	339	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		340
150	#define AIO_TICKS ((1000000 + 1023) >> 10)
151
152	static unsigned int max_poll_time = 0;
153	static unsigned int max_poll_reqs = 0;
154
155	/* calculcate time difference in ~1/AIO_TICKS of a second */
156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
157	{
158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
160	}
161
162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
163
164	static unsigned int started, idle, wanted;
165
166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
168	#else
169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
170	#endif
171
172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
174
175	/* worker threads management */
176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
177
178	typedef struct worker {
179	/* locked by wrklock */
180	struct worker *prev, *next;
181
182	pthread_t tid;
183
184	/* locked by reslock, reqlock or wrklock */
185	aio_req req; /* currently processed request */
186	void *dbuf;
187	DIR *dirp;
188	} worker;
189
190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
191
192	static void worker_clear (worker *wrk)
193	{
194	if (wrk->dirp)
195	{
196	closedir (wrk->dirp);
197	wrk->dirp = 0;
198	}
199
200	if (wrk->dbuf)
201	{
202	free (wrk->dbuf);
203	wrk->dbuf = 0;
204	}
205	}
206
207	static void worker_free (worker *wrk)
208	{
209	wrk->next->prev = wrk->prev;
210	wrk->prev->next = wrk->next;
211
212	free (wrk);
213	}
214
215	static volatile unsigned int nreqs, nready, npending;
216	static volatile unsigned int max_idle = 4;
217	static volatile unsigned int max_outstanding = 0xffffffff;
218	static int respipe [2];
219
220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
221	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
223
224	#if WORDACCESS_UNSAFE
225
226	static unsigned int get_nready ()
227	{
228	unsigned int retval;
229
230	LOCK (reqlock);
231	retval = nready;
232	UNLOCK (reqlock);
233
234	return retval;
235	}
236
237	static unsigned int get_npending ()
238	{
239	unsigned int retval;
240
241	LOCK (reslock);
242	retval = npending;
243	UNLOCK (reslock);
244
245	return retval;
246	}
247
248	static unsigned int get_nthreads ()
249	{
250	unsigned int retval;
251
252	LOCK (wrklock);
253	retval = started;
254	UNLOCK (wrklock);
255
256	return retval;
257	}
258
259	#else
260
261	# define get_nready() nready
262	# define get_npending() npending
263	# define get_nthreads() started
264
265	#endif
266
267	/*
268	* a somewhat faster data structure might be nice, but
269	* with 8 priorities this actually needs <20 insns
270	* per shift, the most expensive operation.
271	*/
272	typedef struct {
273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
274	int size;
275	} reqq;
276
277	static reqq req_queue;
278	static reqq res_queue;
279
280	int reqq_push (reqq *q, aio_req req)
281	{
282	int pri = req->pri;
283	req->next = 0;
284
285	if (q->qe[pri])
286	{
287	q->qe[pri]->next = req;
288	q->qe[pri] = req;
289	}
290	else
291	q->qe[pri] = q->qs[pri] = req;
292
293	return q->size++;
294	}
295
296	aio_req reqq_shift (reqq *q)
297	{
298	int pri;
299
300	if (!q->size)
301	return 0;
302
303	--q->size;
304
305	for (pri = NUM_PRI; pri--; )
306	{
307	aio_req req = q->qs[pri];
308
309	if (req)
310	{
311	if (!(q->qs[pri] = req->next))
312	q->qe[pri] = 0;
313
314	return req;
315	}
316	}
317
318	abort ();
319	}
320
321	static int poll_cb ();
322	static void req_invoke (aio_req req);
323	static void req_free (aio_req req);	341	static void req_destroy (aio_req req);
324	static void req_cancel (aio_req req);	342	static void req_cancel (aio_req req);
325		343
		344	static void want_poll (void)
		345	{
		346	/* write a dummy byte to the pipe so fh becomes ready */
		347	s_epipe_signal (&respipe);
		348	}
		349
		350	static void done_poll (void)
		351	{
		352	/* read any signals sent by the worker threads */
		353	s_epipe_drain (&respipe);
		354	}
		355
326	/* must be called at most once */	356	/* must be called at most once */
327	static SV *req_sv (aio_req req, const char *klass)	357	static SV *req_sv (aio_req req, HV *stash)
328	{	358	{
329	if (!req->self)	359	if (!req->self)
330	{	360	{
331	req->self = (SV *)newHV ();	361	req->self = (SV *)newHV ();
332	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
333	}	363	}
334		364
335	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
336	}	366	}
337		367
338	static aio_req SvAIO_REQ (SV *sv)	368	static aio_req SvAIO_REQ (SV *sv)
339	{	369	{
340	MAGIC *mg;	370	MAGIC *mg;
341		371
342	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	372	if (!SvROK (sv)
		373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		374	&& SvSTASH (SvRV (sv)) != aio_req_stash
		375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
343	croak ("object of class " AIO_REQ_KLASS " expected");	376	croak ("object of class IO::AIO::REQ expected");
344		377
345	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
346		379
347	return mg ? (aio_req)mg->mg_ptr : 0;	380	return mg ? (aio_req)mg->mg_ptr : 0;
348	}	381	}
349		382
350	static void aio_grp_feed (aio_req grp)	383	static void aio_grp_feed (aio_req grp)
351	{	384	{
352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	385	if (grp->sv2 && SvOK (grp->sv2))
353	{	386	{
354	int old_len = grp->length;
355
356	if (grp->fh2 && SvOK (grp->fh2))
357	{
358	dSP;	387	dSP;
359		388
360	ENTER;	389	ENTER;
361	SAVETMPS;	390	SAVETMPS;
362	PUSHMARK (SP);	391	PUSHMARK (SP);
363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	392	XPUSHs (req_sv (grp, aio_grp_stash));
364	PUTBACK;	393	PUTBACK;
365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
366	SPAGAIN;	395	SPAGAIN;
367	FREETMPS;	396	FREETMPS;
368	LEAVE;	397	LEAVE;
369	}
370
371	/* stop if no progress has been made */
372	if (old_len == grp->length)
373	{
374	SvREFCNT_dec (grp->fh2);
375	grp->fh2 = 0;
376	break;
377	}
378	}	398	}
379	}	399	}
380		400
381	static void aio_grp_dec (aio_req grp)	401	static void req_submit (eio_req *req)
382	{	402	{
383	--grp->length;	403	eio_submit (req);
384		404
385	/* call feeder, if applicable */	405	if (expect_false (on_next_submit))
386	aio_grp_feed (grp);
387
388	/* finish, if done */
389	if (!grp->length && grp->fd)
390	{	406	{
391	req_invoke (grp);	407	dSP;
392	req_free (grp);	408	SV *cb = sv_2mortal (on_next_submit);
		409
		410	on_next_submit = 0;
		411
		412	PUSHMARK (SP);
		413	PUTBACK;
		414	call_sv (cb, G_DISCARD | G_EVAL);
393	}	415	}
394	}	416	}
395		417
396	static void req_invoke (aio_req req)	418	static int req_invoke (eio_req *req)
397	{	419	{
398	dSP;	420	if (req->flags & FLAG_SV2_RO_OFF)
		421	SvREADONLY_off (req->sv2);
399		422
400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	423	if (!EIO_CANCELLED (req) && req->callback)
401	{	424	{
		425	dSP;
		426	static SV *sv_result_cache; /* caches the result integer SV */
		427	SV *sv_result;
		428
402	ENTER;	429	ENTER;
403	SAVETMPS;	430	SAVETMPS;
404	PUSHMARK (SP);	431	PUSHMARK (SP);
405	EXTEND (SP, 1);	432	EXTEND (SP, 1);
406		433
		434	/* do not recreate the result IV from scratch each time */
		435	if (expect_true (sv_result_cache))
		436	{
		437	sv_result = sv_result_cache; sv_result_cache = 0;
		438	SvIV_set (sv_result, req->result);
		439	SvIOK_only (sv_result);
		440	}
		441	else
		442	{
		443	sv_result = newSViv (req->result);
		444	SvREADONLY_on (sv_result);
		445	}
		446
407	switch (req->type)	447	switch (req->type)
408	{	448	{
409	case REQ_READDIR:	449	case EIO_READDIR:
410	{	450	{
411	SV *rv = &PL_sv_undef;	451	SV *rv = &PL_sv_undef;
412		452
413	if (req->result >= 0)	453	if (req->result >= 0)
414	{	454	{
415	int i;	455	int i;
416	char *buf = req->data2ptr;	456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
417	AV *av = newAV ();	458	AV *av = newAV ();
418		459
419	av_extend (av, req->result - 1);	460	av_extend (av, req->result - 1);
420		461
421	for (i = 0; i < req->result; ++i)	462	for (i = 0; i < req->result; ++i)
422	{	463	{
423	SV *sv = newSVpv (buf, 0);	464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
424		467
		468	if (req->int1 & EIO_READDIR_CUSTOM2)
		469	{
		470	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		471	AV *avent = newAV ();
		472
		473	av_extend (avent, 2);
		474
		475	if (!sv_type [ent->type])
		476	{
		477	sv_type [ent->type] = newSViv (ent->type);
		478	SvREADONLY_on (sv_type [ent->type]);
		479	}
		480
		481	av_store (avent, 0, namesv);
		482	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		483	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		484
		485	av_store (av, i, newRV_noinc ((SV *)avent));
		486	}
		487	else
425	av_store (av, i, sv);	488	av_store (av, i, namesv);
		489
		490	++ent;
		491	}
		492	else
		493	{
		494	SV *name = newSVpv (names, 0);
		495	av_store (av, i, name);
426	buf += SvCUR (sv) + 1;	496	names += SvCUR (name) + 1;
		497	}
427	}	498	}
428		499
429	rv = sv_2mortal (newRV_noinc ((SV *)av));	500	rv = sv_2mortal (newRV_noinc ((SV *)av));
430	}	501	}
431		502
432	PUSHs (rv);	503	PUSHs (rv);
		504
		505	if (req->int1 & EIO_READDIR_CUSTOM1)
		506	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
433	}	507	}
434	break;	508	break;
435		509
436	case REQ_OPEN:	510	case EIO_OPEN:
437	{	511	{
438	/* convert fd to fh */	512	/* convert fd to fh */
439	SV *fh;	513	SV *fh = &PL_sv_undef;
440		514
441	PUSHs (sv_2mortal (newSViv (req->result)));	515	if (req->result >= 0)
442	PUTBACK;	516	{
443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	517	GV *gv = (GV *)sv_newmortal ();
444	SPAGAIN;	518	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		519	char sym [64];
		520	int symlen;
		521
		522	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		523	gv_init (gv, aio_stash, sym, symlen, 0);
445		524
446	fh = SvREFCNT_inc (POPs);	525	symlen = snprintf (
		526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
447		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
448	PUSHMARK (SP);	537	PUSHs (fh);
449	XPUSHs (sv_2mortal (fh));
450	}	538	}
451	break;	539	break;
452		540
		541	case EIO_STATVFS:
		542	case EIO_FSTATVFS:
		543	{
		544	SV *rv = &PL_sv_undef;
		545
		546	if (req->result >= 0)
		547	{
		548	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		549	HV *hv = newHV ();
		550
		551	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		552
		553	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		554	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		555	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		556	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		557	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		558	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		559	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		560	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		561	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		562	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		563	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		564	}
		565
		566	PUSHs (rv);
		567	}
		568
		569	break;
		570
453	case REQ_GROUP:	571	case EIO_GROUP:
454	req->fd = 2; /* mark group as finished */	572	req->int1 = 2; /* mark group as finished */
455		573
456	if (req->data)	574	if (req->sv1)
457	{	575	{
458	int i;	576	int i;
459	AV *av = (AV *)req->data;	577	AV *av = (AV *)req->sv1;
460		578
461	EXTEND (SP, AvFILL (av) + 1);	579	EXTEND (SP, AvFILL (av) + 1);
462	for (i = 0; i <= AvFILL (av); ++i)	580	for (i = 0; i <= AvFILL (av); ++i)
463	PUSHs (*av_fetch (av, i, 0));	581	PUSHs (*av_fetch (av, i, 0));
464	}	582	}
465	break;	583	break;
466		584
467	case REQ_NOP:	585	case EIO_NOP:
468	case REQ_BUSY:	586	case EIO_BUSY:
469	break;	587	break;
470		588
		589	case EIO_READLINK:
		590	if (req->result > 0)
		591	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		592	break;
		593
		594	case EIO_STAT:
		595	case EIO_LSTAT:
		596	case EIO_FSTAT:
		597	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		598	PL_laststatval = req->result;
		599	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		600	PUSHs (sv_result);
		601	break;
		602
		603	case EIO_READ:
		604	{
		605	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		606	*SvEND (req->sv2) = 0;
		607	SvPOK_only (req->sv2);
		608	SvSETMAGIC (req->sv2);
		609	PUSHs (sv_result);
		610	}
		611	break;
		612
		613	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		614	if (req->result > 0)
		615	SvIV_set (sv_result, 0);
		616	/* FALLTHROUGH */
		617
471	default:	618	default:
472	PUSHs (sv_2mortal (newSViv (req->result)));	619	PUSHs (sv_result);
473	break;	620	break;
474	}	621	}
475		622
476	errno = req->errorno;	623	errno = req->errorno;
477		624
478	PUTBACK;	625	PUTBACK;
479	call_sv (req->callback, G_VOID | G_EVAL);	626	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
480	SPAGAIN;	627	SPAGAIN;
		628
		629	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		630	SvREFCNT_dec (sv_result);
		631	else
		632	sv_result_cache = sv_result;
481		633
482	FREETMPS;	634	FREETMPS;
483	LEAVE;	635	LEAVE;
		636
		637	PUTBACK;
484	}	638	}
485		639
486	if (req->grp)	640	return !!SvTRUE (ERRSV);
487	{
488	aio_req grp = req->grp;
489
490	/* unlink request */
491	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
492	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
493
494	if (grp->grp_first == req)
495	grp->grp_first = req->grp_next;
496
497	aio_grp_dec (grp);
498	}
499
500	if (SvTRUE (ERRSV))
501	{
502	req_free (req);
503	croak (0);
504	}
505	}	641	}
506		642
507	static void req_free (aio_req req)	643	static void req_destroy (aio_req req)
508	{	644	{
509	if (req->self)	645	if (req->self)
510	{	646	{
511	sv_unmagic (req->self, PERL_MAGIC_ext);	647	sv_unmagic (req->self, PERL_MAGIC_ext);
512	SvREFCNT_dec (req->self);	648	SvREFCNT_dec (req->self);
513	}	649	}
514		650
515	SvREFCNT_dec (req->data);
516	SvREFCNT_dec (req->fh);	651	SvREFCNT_dec (req->sv1);
517	SvREFCNT_dec (req->fh2);	652	SvREFCNT_dec (req->sv2);
518	SvREFCNT_dec (req->callback);	653	SvREFCNT_dec (req->callback);
519	Safefree (req->statdata);
520
521	if (req->type == REQ_READDIR)
522	free (req->data2ptr);
523		654
524	Safefree (req);	655	Safefree (req);
525	}	656	}
526		657
527	static void req_cancel_subs (aio_req grp)	658	static void req_cancel_subs (aio_req grp)
528	{	659	{
529	aio_req sub;	660	aio_req sub;
530		661
531	if (grp->type != REQ_GROUP)	662	if (grp->type != EIO_GROUP)
532	return;	663	return;
533		664
534	SvREFCNT_dec (grp->fh2);	665	SvREFCNT_dec (grp->sv2);
535	grp->fh2 = 0;	666	grp->sv2 = 0;
536		667
537	for (sub = grp->grp_first; sub; sub = sub->grp_next)	668	eio_grp_cancel (grp);
538	req_cancel (sub);
539	}	669	}
540		670
541	static void req_cancel (aio_req req)	671	static void
		672	create_respipe (void)
542	{	673	{
543	req->flags |= FLAG_CANCELLED;	674	if (s_epipe_renew (&respipe))
544		675	croak ("IO::AIO: unable to initialize result pipe");
545	req_cancel_subs (req);
546	}	676	}
547		677
548	static void *aio_proc(void *arg);
549
550	static void start_thread (void)
551	{
552	sigset_t fullsigset, oldsigset;
553	pthread_attr_t attr;
554
555	worker *wrk = calloc (1, sizeof (worker));
556
557	if (!wrk)
558	croak ("unable to allocate worker thread data");
559
560	pthread_attr_init (&attr);
561	pthread_attr_setstacksize (&attr, STACKSIZE);
562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
563	#ifdef PTHREAD_SCOPE_PROCESS
564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
565	#endif
566
567	sigfillset (&fullsigset);
568
569	LOCK (wrklock);
570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
571
572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
573	{
574	wrk->prev = &wrk_first;
575	wrk->next = wrk_first.next;
576	wrk_first.next->prev = wrk;
577	wrk_first.next = wrk;
578	++started;
579	}
580	else
581	free (wrk);
582
583	sigprocmask (SIG_SETMASK, &oldsigset, 0);
584	UNLOCK (wrklock);
585	}
586
587	static void maybe_start_thread ()
588	{
589	if (get_nthreads () >= wanted)
590	return;
591
592	/* todo: maybe use idle here, but might be less exact */
593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
594	return;
595
596	start_thread ();
597	}
598
599	static void req_send (aio_req req)
600	{
601	++nreqs;
602
603	LOCK (reqlock);
604	++nready;
605	reqq_push (&req_queue, req);
606	pthread_cond_signal (&reqwait);
607	UNLOCK (reqlock);
608
609	maybe_start_thread ();
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	LOCK (reqlock);
622	reqq_push (&req_queue, req);
623	pthread_cond_signal (&reqwait);
624	UNLOCK (reqlock);
625
626	LOCK (wrklock);
627	--started;
628	UNLOCK (wrklock);
629	}
630
631	static void set_max_idle (int nthreads)
632	{
633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
634	max_idle = nthreads <= 0 ? 1 : nthreads;
635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
636	}
637
638	static void min_parallel (int nthreads)
639	{
640	if (wanted < nthreads)
641	wanted = nthreads;
642	}
643
644	static void max_parallel (int nthreads)
645	{
646	if (wanted > nthreads)
647	wanted = nthreads;
648
649	while (started > wanted)
650	end_thread ();
651	}
652
653	static void poll_wait ()	678	static void poll_wait (void)
654	{	679	{
655	fd_set rfd;
656
657	while (nreqs)	680	while (eio_nreqs ())
658	{	681	{
659	int size;	682	int size;
660	if (WORDACCESS_UNSAFE) LOCK (reslock);	683
		684	X_LOCK (reslock);
661	size = res_queue.size;	685	size = res_queue.size;
662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	686	X_UNLOCK (reslock);
663		687
664	if (size)	688	if (size)
665	return;	689	return;
666		690
667	maybe_start_thread ();	691	etp_maybe_start_thread ();
668		692
669	FD_ZERO(&rfd);	693	s_epipe_wait (&respipe);
670	FD_SET(respipe [0], &rfd);
671
672	select (respipe [0] + 1, &rfd, 0, 0, 0);
673	}	694	}
674	}	695	}
675		696
676	static int poll_cb ()	697	static int poll_cb (void)
677	{	698	{
678	dSP;
679	int count = 0;
680	int maxreqs = max_poll_reqs;
681	int do_croak = 0;
682	struct timeval tv_start, tv_now;
683	aio_req req;
684
685	if (max_poll_time)
686	gettimeofday (&tv_start, 0);
687
688	for (;;)	699	for (;;)
689	{	700	{
690	for (;;)	701	int res = eio_poll ();
691	{
692	maybe_start_thread ();
693		702
694	LOCK (reslock);	703	if (res > 0)
695	req = reqq_shift (&res_queue);
696
697	if (req)
698	{
699	--npending;
700
701	if (!res_queue.size)
702	{
703	/* read any signals sent by the worker threads */
704	char buf [32];
705	while (read (respipe [0], buf, 32) == 32)
706	;
707	}
708	}
709
710	UNLOCK (reslock);
711
712	if (!req)
713	break;
714
715	--nreqs;
716
717	if (req->type == REQ_GROUP && req->length)
718	{
719	req->fd = 1; /* mark request as delayed */
720	continue;
721	}
722	else
723	{
724	if (req->type == REQ_READ)
725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
726
727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
728	SvREADONLY_off (req->data);
729
730	if (req->statdata)
731	{
732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
733	PL_laststatval = req->result;
734	PL_statcache = *(req->statdata);
735	}
736
737	req_invoke (req);
738
739	count++;
740	}
741
742	req_free (req);
743
744	if (maxreqs && !--maxreqs)
745	break;
746
747	if (max_poll_time)
748	{
749	gettimeofday (&tv_now, 0);
750
751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
752	break;
753	}
754	}
755
756	if (nreqs <= max_outstanding)
757	break;	704	croak (0);
		705
		706	if (!max_outstanding || max_outstanding > eio_nreqs ())
		707	return res;
758		708
759	poll_wait ();	709	poll_wait ();
760
761	++maxreqs;
762	}	710	}
763
764	return count;
765	}	711	}
766		712
767	static void create_pipe ()	713	static void atfork_child (void)
768	{	714	{
769	if (pipe (respipe))	715	create_respipe ();
770	croak ("unable to initialize result pipe");
771
772	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
773	croak ("cannot set result pipe to nonblocking mode");
774
775	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
776	croak ("cannot set result pipe to nonblocking mode");
777	}	716	}
778		717
779	/*****************************************************************************/	718	/*****************************************************************************/
780	/* work around various missing functions */
781		719
782	#if !HAVE_PREADWRITE	720	#if !_POSIX_MAPPED_FILES
783	# define pread aio_pread	721	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
784	# define pwrite aio_pwrite	722	# define munmap(addr,length) (errno = ENOSYS, -1)
785
786	/*
787	* make our pread/pwrite safe against themselves, but not against
788	* normal read/write by using a mutex. slows down execution a lot,
789	* but that's your problem, not mine.
790	*/
791	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
792
793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
794	{
795	ssize_t res;
796	off_t ooffset;
797
798	LOCK (preadwritelock);
799	ooffset = lseek (fd, 0, SEEK_CUR);
800	lseek (fd, offset, SEEK_SET);
801	res = read (fd, buf, count);
802	lseek (fd, ooffset, SEEK_SET);
803	UNLOCK (preadwritelock);
804
805	return res;
806	}
807
808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
809	{
810	ssize_t res;
811	off_t ooffset;
812
813	LOCK (preadwritelock);
814	ooffset = lseek (fd, 0, SEEK_CUR);
815	lseek (fd, offset, SEEK_SET);
816	res = write (fd, buf, count);
817	lseek (fd, offset, SEEK_SET);
818	UNLOCK (preadwritelock);
819
820	return res;
821	}
822	#endif
823
824	#if !HAVE_FDATASYNC
825	# define fdatasync fsync
826	#endif
827
828	#if !HAVE_READAHEAD
829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
830
831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
832	{
833	dBUF;
834
835	while (count > 0)
836	{
837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
838
839	pread (fd, aio_buf, len, offset);
840	offset += len;
841	count -= len;
842	}
843
844	errno = 0;
845	}
846
847	#endif
848
849	#if !HAVE_READDIR_R
850	# define readdir_r aio_readdir_r
851
852	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
853
854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
855	{
856	struct dirent *e;
857	int errorno;
858
859	LOCK (readdirlock);
860
861	e = readdir (dirp);
862	errorno = errno;
863
864	if (e)
865	{
866	*res = ent;
867	strcpy (ent->d_name, e->d_name);
868	}
869	else
870	*res = 0;
871
872	UNLOCK (readdirlock);
873
874	errno = errorno;
875	return e ? 0 : -1;
876	}
877	#endif
878
879	/* sendfile always needs emulation */
880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
881	{
882	ssize_t res;
883
884	if (!count)
885	return 0;
886
887	#if HAVE_SENDFILE
888	# if __linux
889	res = sendfile (ofd, ifd, &offset, count);
890
891	# elif __freebsd
892	/*
893	* Of course, the freebsd sendfile is a dire hack with no thoughts
894	* wasted on making it similar to other I/O functions.
895	*/
896	{
897	off_t sbytes;
898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
899
900	if (res < 0 && sbytes)
901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
902	res = sbytes;
903	}
904
905	# elif __hpux
906	res = sendfile (ofd, ifd, offset, count, 0, 0);
907
908	# elif __solaris
909	{
910	struct sendfilevec vec;
911	size_t sbytes;
912
913	vec.sfv_fd = ifd;
914	vec.sfv_flag = 0;
915	vec.sfv_off = offset;
916	vec.sfv_len = count;
917
918	res = sendfilev (ofd, &vec, 1, &sbytes);
919
920	if (res < 0 && sbytes)
921	res = sbytes;
922	}
923
924	# endif	723	#endif
925	#else
926	res = -1;
927	errno = ENOSYS;
928	#endif
929		724
930	if (res < 0	725	#if !_POSIX_MEMORY_PROTECTION
931	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	726	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
932	#if __solaris	727	# define PROT_NONE 0
933	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	728	# define PROT_WRITE 0
		729	# define MAP_PRIVATE 0
		730	# define MAP_SHARED 0
		731	# define MAP_FIXED 0
934	#endif	732	#endif
935	)
936	)
937	{
938	/* emulate sendfile. this is a major pain in the ass */
939	dBUF;
940		733
941	res = 0;	734	#define MMAP_MAGIC PERL_MAGIC_ext
942		735
943	while (count)	736	static int
944	{	737	mmap_free (pTHX_ SV *sv, MAGIC *mg)
945	ssize_t cnt;	738	{
946		739	int old_errno = errno;
947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);	740	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		741	errno = old_errno;
948		742
949	if (cnt <= 0)	743	mg->mg_obj = 0; /* just in case */
950	{
951	if (cnt && !res) res = -1;
952	break;
953	}
954		744
955	cnt = write (ofd, aio_buf, cnt);	745	SvREADONLY_off (sv);
956		746
957	if (cnt <= 0)	747	if (SvPVX (sv) != mg->mg_ptr)
958	{	748	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
959	if (cnt && !res) res = -1;
960	break;
961	}
962		749
963	offset += cnt;	750	SvCUR_set (sv, 0);
964	res += cnt;	751	SvPVX (sv) = 0;
965	count -= cnt;	752	SvOK_off (sv);
966	}
967	}
968		753
969	return res;	754	return 0;
970	}	755	}
971		756
972	/* read a full directory */	757	static MGVTBL mmap_vtbl = {
973	static void scandir_ (aio_req req, worker *self)	758	0, 0, 0, 0, mmap_free
974	{	759	};
975	DIR *dirp;
976	union
977	{
978	struct dirent d;
979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
980	} *u;
981	struct dirent *entp;
982	char *name, *names;
983	int memlen = 4096;
984	int memofs = 0;
985	int res = 0;
986	int errorno;
987
988	LOCK (wrklock);
989	self->dirp = dirp = opendir (req->dataptr);
990	self->dbuf = u = malloc (sizeof (*u));
991	req->data2ptr = names = malloc (memlen);
992	UNLOCK (wrklock);
993
994	if (dirp && u && names)
995	for (;;)
996	{
997	errno = 0;
998	readdir_r (dirp, &u->d, &entp);
999
1000	if (!entp)
1001	break;
1002
1003	name = entp->d_name;
1004
1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1006	{
1007	int len = strlen (name) + 1;
1008
1009	res++;
1010
1011	while (memofs + len > memlen)
1012	{
1013	memlen *= 2;
1014	LOCK (wrklock);
1015	req->data2ptr = names = realloc (names, memlen);
1016	UNLOCK (wrklock);
1017
1018	if (!names)
1019	break;
1020	}
1021
1022	memcpy (names + memofs, name, len);
1023	memofs += len;
1024	}
1025	}
1026
1027	if (errno)
1028	res = -1;
1029
1030	req->result = res;
1031	}
1032		760
1033	/*****************************************************************************/	761	/*****************************************************************************/
1034		762
1035	static void *aio_proc (void *thr_arg)	763	static SV *
		764	get_cb (SV *cb_sv)
1036	{	765	{
1037	aio_req req;	766	SvGETMAGIC (cb_sv);
1038	struct timespec ts;	767	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1039	worker *self = (worker *)thr_arg;
1040
1041	/* try to distribute timeouts somewhat evenly */
1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1043	* (1000000000UL / 1024UL);
1044
1045	for (;;)
1046	{
1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1048
1049	LOCK (reqlock);
1050
1051	for (;;)
1052	{
1053	self->req = req = reqq_shift (&req_queue);
1054
1055	if (req)
1056	break;
1057
1058	++idle;
1059
1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1061	== ETIMEDOUT)
1062	{
1063	if (idle > max_idle)
1064	{
1065	--idle;
1066	UNLOCK (reqlock);
1067	LOCK (wrklock);
1068	--started;
1069	UNLOCK (wrklock);
1070	goto quit;
1071	}
1072
1073	/* we are allowed to idle, so do so without any timeout */
1074	pthread_cond_wait (&reqwait, &reqlock);
1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1076	}
1077
1078	--idle;
1079	}
1080
1081	--nready;
1082
1083	UNLOCK (reqlock);
1084
1085	errno = 0; /* strictly unnecessary */
1086
1087	if (!(req->flags & FLAG_CANCELLED))
1088	switch (req->type)
1089	{
1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1092
1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1095
1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1099
1100	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1101	case REQ_CLOSE: req->result = close (req->fd); break;
1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1108
1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
1111	case REQ_READDIR: scandir_ (req, self); break;
1112
1113	case REQ_BUSY:
1114	{
1115	struct timeval tv;
1116
1117	tv.tv_sec = req->fd;
1118	tv.tv_usec = req->fd2;
1119
1120	req->result = select (0, 0, 0, 0, &tv);
1121	}
1122
1123	case REQ_GROUP:
1124	case REQ_NOP:
1125	break;
1126
1127	case REQ_QUIT:
1128	goto quit;
1129
1130	default:
1131	req->result = ENOSYS;
1132	break;
1133	}
1134
1135	req->errorno = errno;
1136
1137	LOCK (reslock);
1138
1139	++npending;
1140
1141	if (!reqq_push (&res_queue, req))
1142	/* write a dummy byte to the pipe so fh becomes ready */
1143	write (respipe [1], &respipe, 1);
1144
1145	self->req = 0;
1146	worker_clear (self);
1147
1148	UNLOCK (reslock);
1149	}
1150
1151	quit:
1152	LOCK (wrklock);
1153	worker_free (self);
1154	UNLOCK (wrklock);
1155
1156	return 0;
1157	}
1158
1159	/*****************************************************************************/
1160
1161	static void atfork_prepare (void)
1162	{
1163	LOCK (wrklock);
1164	LOCK (reqlock);
1165	LOCK (reslock);
1166	#if !HAVE_PREADWRITE
1167	LOCK (preadwritelock);
1168	#endif
1169	#if !HAVE_READDIR_R
1170	LOCK (readdirlock);
1171	#endif
1172	}
1173
1174	static void atfork_parent (void)
1175	{
1176	#if !HAVE_READDIR_R
1177	UNLOCK (readdirlock);
1178	#endif
1179	#if !HAVE_PREADWRITE
1180	UNLOCK (preadwritelock);
1181	#endif
1182	UNLOCK (reslock);
1183	UNLOCK (reqlock);
1184	UNLOCK (wrklock);
1185	}
1186
1187	static void atfork_child (void)
1188	{
1189	aio_req prv;
1190
1191	while (prv = reqq_shift (&req_queue))
1192	req_free (prv);
1193
1194	while (prv = reqq_shift (&res_queue))
1195	req_free (prv);
1196
1197	while (wrk_first.next != &wrk_first)
1198	{
1199	worker *wrk = wrk_first.next;
1200
1201	if (wrk->req)
1202	req_free (wrk->req);
1203
1204	worker_clear (wrk);
1205	worker_free (wrk);
1206	}
1207
1208	started = 0;
1209	idle = 0;
1210	nreqs = 0;
1211	nready = 0;
1212	npending = 0;
1213
1214	close (respipe [0]);
1215	close (respipe [1]);
1216	create_pipe ();
1217
1218	atfork_parent ();
1219	}	768	}
1220		769
1221	#define dREQ \	770	#define dREQ \
		771	SV *cb_cv; \
1222	aio_req req; \	772	aio_req req; \
1223	int req_pri = next_pri; \	773	int req_pri = next_pri; \
1224	next_pri = DEFAULT_PRI + PRI_BIAS; \	774	next_pri = EIO_PRI_DEFAULT; \
1225	\	775	\
1226	if (SvOK (callback) && !SvROK (callback)) \	776	cb_cv = get_cb (callback); \
1227	croak ("callback must be undef or of reference type"); \
1228	\	777	\
1229	Newz (0, req, 1, aio_cb); \	778	Newz (0, req, 1, eio_req); \
1230	if (!req) \	779	if (!req) \
1231	croak ("out of memory during aio_req allocation"); \	780	croak ("out of memory during eio_req allocation"); \
1232	\	781	\
1233	req->callback = newSVsv (callback); \	782	req->callback = SvREFCNT_inc (cb_cv); \
1234	req->pri = req_pri	783	req->pri = req_pri
1235		784
1236	#define REQ_SEND \	785	#define REQ_SEND \
		786	PUTBACK; \
1237	req_send (req); \	787	req_submit (req); \
		788	SPAGAIN; \
1238	\	789	\
1239	if (GIMME_V != G_VOID) \	790	if (GIMME_V != G_VOID) \
1240	XPUSHs (req_sv (req, AIO_REQ_KLASS));	791	XPUSHs (req_sv (req, aio_req_stash));
1241		792
1242	MODULE = IO::AIO PACKAGE = IO::AIO	793	MODULE = IO::AIO PACKAGE = IO::AIO
1243		794
1244	PROTOTYPES: ENABLE	795	PROTOTYPES: ENABLE
1245		796
1246	BOOT:	797	BOOT:
1247	{	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 (READDIR_DENTS)
		899	const_eio (READDIR_DIRS_FIRST)
		900	const_eio (READDIR_STAT_ORDER)
		901	const_eio (READDIR_FOUND_UNKNOWN)
		902
		903	const_eio (DT_UNKNOWN)
		904	const_eio (DT_FIFO)
		905	const_eio (DT_CHR)
		906	const_eio (DT_DIR)
		907	const_eio (DT_BLK)
		908	const_eio (DT_REG)
		909	const_eio (DT_LNK)
		910	const_eio (DT_SOCK)
		911	const_eio (DT_WHT)
		912	};
		913
1248	HV *stash = gv_stashpv ("IO::AIO", 1);	914	aio_stash = gv_stashpv ("IO::AIO" , 1);
		915	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		916	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1249		917
1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	918	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	919	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1256		920
		921	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		922
1257	create_pipe ();	923	create_respipe ();
1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1259	}
1260		924
		925	if (eio_init (want_poll, done_poll) < 0)
		926	croak ("IO::AIO: unable to initialise eio library");
		927
		928	/* atfork child called in fifo order, so before eio's handler */
		929	X_THREAD_ATFORK (0, 0, atfork_child);
		930	}
		931
1261	void	932	void
1262	max_poll_reqs (int nreqs)	933	max_poll_reqs (unsigned int nreqs)
1263	PROTOTYPE: $	934	PROTOTYPE: $
1264	CODE:	935	CODE:
1265	max_poll_reqs = nreqs;	936	eio_set_max_poll_reqs (nreqs);
1266		937
1267	void	938	void
1268	max_poll_time (double nseconds)	939	max_poll_time (double nseconds)
1269	PROTOTYPE: $	940	PROTOTYPE: $
1270	CODE:	941	CODE:
1271	max_poll_time = nseconds * AIO_TICKS;	942	eio_set_max_poll_time (nseconds);
1272		943
1273	void	944	void
1274	min_parallel (int nthreads)	945	min_parallel (unsigned int nthreads)
1275	PROTOTYPE: $
1276
1277	void
1278	max_parallel (int nthreads)
1279	PROTOTYPE: $
1280
1281	void
1282	max_idle (int nthreads)
1283	PROTOTYPE: $	946	PROTOTYPE: $
1284	CODE:	947	CODE:
1285	set_max_idle (nthreads);	948	eio_set_min_parallel (nthreads);
1286		949
1287	int	950	void
1288	max_outstanding (int maxreqs)	951	max_parallel (unsigned int nthreads)
1289	PROTOTYPE: $	952	PROTOTYPE: $
1290	CODE:	953	CODE:
1291	RETVAL = max_outstanding;	954	eio_set_max_parallel (nthreads);
		955
		956	void
		957	max_idle (unsigned int nthreads)
		958	PROTOTYPE: $
		959	CODE:
		960	eio_set_max_idle (nthreads);
		961
		962	void
		963	idle_timeout (unsigned int seconds)
		964	PROTOTYPE: $
		965	CODE:
		966	eio_set_idle_timeout (seconds);
		967
		968	void
		969	max_outstanding (unsigned int maxreqs)
		970	PROTOTYPE: $
		971	CODE:
1292	max_outstanding = maxreqs;	972	max_outstanding = maxreqs;
1293	OUTPUT:
1294	RETVAL
1295		973
1296	void	974	void
1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	975	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1298	SV * pathname
1299	int flags
1300	int mode
1301	SV * callback
1302	PROTOTYPE: $$$;$
1303	PPCODE:	976	PPCODE:
1304	{	977	{
1305	dREQ;	978	dREQ;
1306		979
1307	req->type = REQ_OPEN;	980	req->type = EIO_OPEN;
1308	req->data = newSVsv (pathname);	981	req->sv1 = newSVsv (pathname);
1309	req->dataptr = SvPVbyte_nolen (req->data);	982	req->ptr1 = SvPVbyte_nolen (req->sv1);
1310	req->fd = flags;	983	req->int1 = flags;
1311	req->mode = mode;	984	req->int2 = mode;
1312		985
1313	REQ_SEND;	986	REQ_SEND;
1314	}	987	}
1315		988
1316	void	989	void
1317	aio_close (fh,callback=&PL_sv_undef)	990	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1318	SV * fh
1319	SV * callback
1320	PROTOTYPE: $;$
1321	ALIAS:	991	ALIAS:
1322	aio_close = REQ_CLOSE
1323	aio_fsync = REQ_FSYNC	992	aio_fsync = EIO_FSYNC
1324	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = EIO_FDATASYNC
1325	PPCODE:	994	PPCODE:
1326	{	995	{
		996	int fd = s_fileno_croak (fh, 0);
1327	dREQ;	997	dREQ;
1328		998
1329	req->type = ix;	999	req->type = ix;
1330	req->fh = newSVsv (fh);	1000	req->sv1 = newSVsv (fh);
1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1001	req->int1 = fd;
1332		1002
1333	REQ_SEND (req);	1003	REQ_SEND (req);
1334	}	1004	}
1335		1005
1336	void	1006	void
		1007	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1008	PPCODE:
		1009	{
		1010	int fd = s_fileno_croak (fh, 0);
		1011	dREQ;
		1012
		1013	req->type = EIO_SYNC_FILE_RANGE;
		1014	req->sv1 = newSVsv (fh);
		1015	req->int1 = fd;
		1016	req->offs = offset;
		1017	req->size = nbytes;
		1018	req->int2 = flags;
		1019
		1020	REQ_SEND (req);
		1021	}
		1022
		1023	void
		1024	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1025	PPCODE:
		1026	{
		1027	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		1028	int fd = s_fileno_croak (fh, 0);
		1029	dREQ;
		1030
		1031	if (close_pipe < 0)
		1032	{
		1033	int pipefd [2];
		1034
		1035	if (pipe (pipefd) < 0
		1036	|| close (pipefd [1]) < 0
		1037	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1038	abort (); /*D*/
		1039
		1040	close_pipe = pipefd [0];
		1041	}
		1042
		1043	req->type = EIO_DUP2;
		1044	req->int1 = close_pipe;
		1045	req->sv2 = newSVsv (fh);
		1046	req->int2 = fd;
		1047
		1048	REQ_SEND (req);
		1049	}
		1050
		1051	void
1337	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1052	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1338	SV * fh
1339	UV offset
1340	UV length
1341	SV * data
1342	UV dataoffset
1343	SV * callback
1344	ALIAS:	1053	ALIAS:
1345	aio_read = REQ_READ	1054	aio_read = EIO_READ
1346	aio_write = REQ_WRITE	1055	aio_write = EIO_WRITE
1347	PROTOTYPE: $$$$$;$
1348	PPCODE:	1056	PPCODE:
1349	{	1057	{
1350	aio_req req;
1351	STRLEN svlen;	1058	STRLEN svlen;
		1059	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1352	char *svptr = SvPVbyte (data, svlen);	1060	char *svptr = SvPVbyte (data, svlen);
1353		1061	UV len = SvUV (length);
1354	SvUPGRADE (data, SVt_PV);
1355	SvPOK_on (data);
1356		1062
1357	if (dataoffset < 0)	1063	if (dataoffset < 0)
1358	dataoffset += svlen;	1064	dataoffset += svlen;
1359		1065
1360	if (dataoffset < 0 || dataoffset > svlen)	1066	if (dataoffset < 0 || dataoffset > svlen)
1361	croak ("data offset outside of string");	1067	croak ("dataoffset outside of data scalar");
1362		1068
1363	if (ix == REQ_WRITE)	1069	if (ix == EIO_WRITE)
1364	{	1070	{
1365	/* write: check length and adjust. */	1071	/* write: check length and adjust. */
1366	if (length < 0 || length + dataoffset > svlen)	1072	if (!SvOK (length) || len + dataoffset > svlen)
1367	length = svlen - dataoffset;	1073	len = svlen - dataoffset;
1368	}	1074	}
1369	else	1075	else
1370	{	1076	{
1371	/* read: grow scalar as necessary */	1077	/* read: check type and grow scalar as necessary */
		1078	SvUPGRADE (data, SVt_PV);
1372	svptr = SvGROW (data, length + dataoffset);	1079	svptr = SvGROW (data, len + dataoffset + 1);
1373	}	1080	}
1374
1375	if (length < 0)
1376	croak ("length must not be negative");
1377		1081
1378	{	1082	{
1379	dREQ;	1083	dREQ;
1380		1084
1381	req->type = ix;	1085	req->type = ix;
1382	req->fh = newSVsv (fh);	1086	req->sv1 = newSVsv (fh);
1383	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1087	req->int1 = fd;
1384	: IoOFP (sv_2io (fh)));	1088	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1385	req->offset = offset;	1089	req->size = len;
1386	req->length = length;
1387	req->data = SvREFCNT_inc (data);	1090	req->sv2 = SvREFCNT_inc (data);
1388	req->dataptr = (char *)svptr + dataoffset;	1091	req->ptr2 = (char *)svptr + dataoffset;
		1092	req->stroffset = dataoffset;
1389		1093
1390	if (!SvREADONLY (data))	1094	if (!SvREADONLY (data))
1391	{	1095	{
1392	SvREADONLY_on (data);	1096	SvREADONLY_on (data);
1393	req->data2ptr = (void *)data;	1097	req->flags |= FLAG_SV2_RO_OFF;
1394	}	1098	}
1395		1099
1396	REQ_SEND;	1100	REQ_SEND;
1397	}	1101	}
1398	}	1102	}
1399		1103
1400	void	1104	void
1401	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1105	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1402	SV * out_fh
1403	SV * in_fh
1404	UV in_offset
1405	UV length
1406	SV * callback
1407	PROTOTYPE: $$$$;$
1408	PPCODE:	1106	PPCODE:
1409	{	1107	{
		1108	SV *data;
		1109	dREQ;
		1110
		1111	req->type = EIO_READLINK;
		1112	req->sv1 = newSVsv (path);
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114
		1115	REQ_SEND;
		1116	}
		1117
		1118	void
		1119	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1120	PPCODE:
		1121	{
		1122	int ifd = s_fileno_croak (in_fh , 0);
		1123	int ofd = s_fileno_croak (out_fh, 1);
1410	dREQ;	1124	dREQ;
1411		1125
1412	req->type = REQ_SENDFILE;	1126	req->type = EIO_SENDFILE;
1413	req->fh = newSVsv (out_fh);	1127	req->sv1 = newSVsv (out_fh);
1414	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1128	req->int1 = ofd;
1415	req->fh2 = newSVsv (in_fh);	1129	req->sv2 = newSVsv (in_fh);
1416	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1130	req->int2 = ifd;
1417	req->offset = in_offset;	1131	req->offs = in_offset;
1418	req->length = length;	1132	req->size = length;
1419		1133
1420	REQ_SEND;	1134	REQ_SEND;
1421	}	1135	}
1422		1136
1423	void	1137	void
1424	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1138	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1425	SV * fh
1426	UV offset
1427	IV length
1428	SV * callback
1429	PROTOTYPE: $$$;$
1430	PPCODE:	1139	PPCODE:
1431	{	1140	{
		1141	int fd = s_fileno_croak (fh, 0);
1432	dREQ;	1142	dREQ;
1433		1143
1434	req->type = REQ_READAHEAD;	1144	req->type = EIO_READAHEAD;
1435	req->fh = newSVsv (fh);	1145	req->sv1 = newSVsv (fh);
1436	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1146	req->int1 = fd;
1437	req->offset = offset;	1147	req->offs = offset;
1438	req->length = length;	1148	req->size = length;
1439		1149
1440	REQ_SEND;	1150	REQ_SEND;
1441	}	1151	}
1442		1152
1443	void	1153	void
1444	aio_stat (fh_or_path,callback=&PL_sv_undef)	1154	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1445	SV * fh_or_path
1446	SV * callback
1447	ALIAS:	1155	ALIAS:
1448	aio_stat = REQ_STAT	1156	aio_stat = EIO_STAT
1449	aio_lstat = REQ_LSTAT	1157	aio_lstat = EIO_LSTAT
		1158	aio_statvfs = EIO_STATVFS
1450	PPCODE:	1159	PPCODE:
1451	{	1160	{
1452	dREQ;	1161	dREQ;
1453		1162
1454	New (0, req->statdata, 1, Stat_t);	1163	req->sv1 = newSVsv (fh_or_path);
1455	if (!req->statdata)
1456	{
1457	req_free (req);
1458	croak ("out of memory during aio_req->statdata allocation");
1459	}
1460		1164
1461	if (SvPOK (fh_or_path))	1165	if (SvPOK (req->sv1))
1462	{	1166	{
1463	req->type = ix;	1167	req->type = ix;
1464	req->data = newSVsv (fh_or_path);
1465	req->dataptr = SvPVbyte_nolen (req->data);	1168	req->ptr1 = SvPVbyte_nolen (req->sv1);
1466	}	1169	}
1467	else	1170	else
1468	{	1171	{
1469	req->type = REQ_FSTAT;	1172	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1470	req->fh = newSVsv (fh_or_path);
1471	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1173	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1472	}	1174	}
1473		1175
1474	REQ_SEND;	1176	REQ_SEND;
1475	}	1177	}
1476		1178
		1179	UV
		1180	major (UV dev)
		1181	ALIAS:
		1182	minor = 1
		1183	CODE:
		1184	RETVAL = ix ? major (dev) : minor (dev);
		1185	OUTPUT:
		1186	RETVAL
		1187
		1188	UV
		1189	makedev (UV maj, UV min)
		1190	CODE:
		1191	RETVAL = makedev (maj, min);
		1192	OUTPUT:
		1193	RETVAL
		1194
1477	void	1195	void
		1196	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1197	PPCODE:
		1198	{
		1199	dREQ;
		1200
		1201	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1202	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1203	req->sv1 = newSVsv (fh_or_path);
		1204
		1205	if (SvPOK (req->sv1))
		1206	{
		1207	req->type = EIO_UTIME;
		1208	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1209	}
		1210	else
		1211	{
		1212	req->type = EIO_FUTIME;
		1213	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1214	}
		1215
		1216	REQ_SEND;
		1217	}
		1218
		1219	void
		1220	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1221	PPCODE:
		1222	{
		1223	dREQ;
		1224
		1225	req->sv1 = newSVsv (fh_or_path);
		1226	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1227
		1228	if (SvPOK (req->sv1))
		1229	{
		1230	req->type = EIO_TRUNCATE;
		1231	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1232	}
		1233	else
		1234	{
		1235	req->type = EIO_FTRUNCATE;
		1236	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1237	}
		1238
		1239	REQ_SEND;
		1240	}
		1241
		1242	void
		1243	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1244	ALIAS:
		1245	aio_chmod = EIO_CHMOD
		1246	aio_mkdir = EIO_MKDIR
		1247	PPCODE:
		1248	{
		1249	dREQ;
		1250
		1251	req->int2 = mode;
		1252	req->sv1 = newSVsv (fh_or_path);
		1253
		1254	if (SvPOK (req->sv1))
		1255	{
		1256	req->type = ix;
		1257	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1258	}
		1259	else
		1260	{
		1261	req->type = EIO_FCHMOD;
		1262	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1263	}
		1264
		1265	REQ_SEND;
		1266	}
		1267
		1268	void
		1269	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1270	PPCODE:
		1271	{
		1272	dREQ;
		1273
		1274	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1275	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1276	req->sv1 = newSVsv (fh_or_path);
		1277
		1278	if (SvPOK (req->sv1))
		1279	{
		1280	req->type = EIO_CHOWN;
		1281	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1282	}
		1283	else
		1284	{
		1285	req->type = EIO_FCHOWN;
		1286	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1287	}
		1288
		1289	REQ_SEND;
		1290	}
		1291
		1292	void
		1293	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1294	PPCODE:
		1295	{
		1296	dREQ;
		1297
		1298	req->type = EIO_READDIR;
		1299	req->sv1 = newSVsv (pathname);
		1300	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1301	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1302
		1303	if (flags & EIO_READDIR_DENTS)
		1304	req->int1 |= EIO_READDIR_CUSTOM2;
		1305
		1306	REQ_SEND;
		1307	}
		1308
		1309	void
1478	aio_unlink (pathname,callback=&PL_sv_undef)	1310	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1479	SV * pathname
1480	SV * callback
1481	ALIAS:	1311	ALIAS:
1482	aio_unlink = REQ_UNLINK	1312	aio_unlink = EIO_UNLINK
1483	aio_rmdir = REQ_RMDIR	1313	aio_rmdir = EIO_RMDIR
1484	aio_readdir = REQ_READDIR	1314	aio_readdir = EIO_READDIR
1485	PPCODE:	1315	PPCODE:
1486	{	1316	{
1487	dREQ;	1317	dREQ;
1488		1318
1489	req->type = ix;	1319	req->type = ix;
1490	req->data = newSVsv (pathname);	1320	req->sv1 = newSVsv (pathname);
1491	req->dataptr = SvPVbyte_nolen (req->data);	1321	req->ptr1 = SvPVbyte_nolen (req->sv1);
1492		1322
1493	REQ_SEND;	1323	REQ_SEND;
1494	}	1324	}
1495		1325
1496	void	1326	void
1497	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1327	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1498	SV * oldpath
1499	SV * newpath
1500	SV * callback
1501	ALIAS:	1328	ALIAS:
1502	aio_link = REQ_LINK	1329	aio_link = EIO_LINK
1503	aio_symlink = REQ_SYMLINK	1330	aio_symlink = EIO_SYMLINK
1504	aio_rename = REQ_RENAME	1331	aio_rename = EIO_RENAME
1505	PPCODE:	1332	PPCODE:
1506	{	1333	{
1507	dREQ;	1334	dREQ;
1508		1335
1509	req->type = ix;	1336	req->type = ix;
1510	req->fh = newSVsv (oldpath);	1337	req->sv1 = newSVsv (oldpath);
1511	req->data2ptr = SvPVbyte_nolen (req->fh);	1338	req->ptr1 = SvPVbyte_nolen (req->sv1);
1512	req->data = newSVsv (newpath);	1339	req->sv2 = newSVsv (newpath);
1513	req->dataptr = SvPVbyte_nolen (req->data);	1340	req->ptr2 = SvPVbyte_nolen (req->sv2);
1514		1341
1515	REQ_SEND;	1342	REQ_SEND;
1516	}	1343	}
1517		1344
1518	void	1345	void
1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1346	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1520	SV * pathname
1521	SV * callback
1522	UV mode
1523	UV dev
1524	PPCODE:	1347	PPCODE:
1525	{	1348	{
1526	dREQ;	1349	dREQ;
1527		1350
1528	req->type = REQ_MKNOD;	1351	req->type = EIO_MKNOD;
1529	req->data = newSVsv (pathname);	1352	req->sv1 = newSVsv (pathname);
1530	req->dataptr = SvPVbyte_nolen (req->data);	1353	req->ptr1 = SvPVbyte_nolen (req->sv1);
1531	req->mode = (mode_t)mode;	1354	req->int2 = (mode_t)mode;
1532	req->offset = dev;	1355	req->offs = dev;
1533		1356
1534	REQ_SEND;	1357	REQ_SEND;
1535	}	1358	}
1536		1359
1537	void	1360	void
		1361	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1362	ALIAS:
		1363	aio_mtouch = EIO_MTOUCH
		1364	aio_msync = EIO_MSYNC
		1365	PPCODE:
		1366	{
		1367	STRLEN svlen;
		1368	char *svptr = SvPVbyte (data, svlen);
		1369	UV len = SvUV (length);
		1370
		1371	if (offset < 0)
		1372	offset += svlen;
		1373
		1374	if (offset < 0 || offset > svlen)
		1375	croak ("offset outside of scalar");
		1376
		1377	if (!SvOK (length) || len + offset > svlen)
		1378	len = svlen - offset;
		1379
		1380	{
		1381	dREQ;
		1382
		1383	req->type = ix;
		1384	req->sv2 = SvREFCNT_inc (data);
		1385	req->ptr2 = (char *)svptr + offset;
		1386	req->size = len;
		1387	req->int1 = flags;
		1388
		1389	REQ_SEND;
		1390	}
		1391	}
		1392
		1393	void
		1394	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	STRLEN svlen;
		1398	char *svptr = SvPVbyte (data, svlen);
		1399	UV len = SvUV (length);
		1400
		1401	if (offset < 0)
		1402	offset += svlen;
		1403
		1404	if (offset < 0 || offset > svlen)
		1405	croak ("offset outside of scalar");
		1406
		1407	if (!SvOK (length) || len + offset > svlen)
		1408	len = svlen - offset;
		1409
		1410	{
		1411	dREQ;
		1412
		1413	req->type = EIO_MLOCK;
		1414	req->sv2 = SvREFCNT_inc (data);
		1415	req->ptr2 = (char *)svptr + offset;
		1416	req->size = len;
		1417
		1418	REQ_SEND;
		1419	}
		1420	}
		1421
		1422	void
		1423	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1424	PPCODE:
		1425	{
		1426	dREQ;
		1427
		1428	req->type = EIO_MLOCKALL;
		1429	req->int1 = flags;
		1430
		1431	REQ_SEND;
		1432	}
		1433
		1434	void
1538	aio_busy (delay,callback=&PL_sv_undef)	1435	aio_busy (double delay, SV *callback=&PL_sv_undef)
1539	double delay
1540	SV * callback
1541	PPCODE:	1436	PPCODE:
1542	{	1437	{
1543	dREQ;	1438	dREQ;
1544		1439
1545	req->type = REQ_BUSY;	1440	req->type = EIO_BUSY;
1546	req->fd = delay < 0. ? 0 : delay;	1441	req->nv1 = delay < 0. ? 0. : delay;
1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1548		1442
1549	REQ_SEND;	1443	REQ_SEND;
1550	}	1444	}
1551		1445
1552	void	1446	void
1553	aio_group (callback=&PL_sv_undef)	1447	aio_group (SV *callback=&PL_sv_undef)
1554	SV * callback
1555	PROTOTYPE: ;$
1556	PPCODE:	1448	PPCODE:
1557	{	1449	{
1558	dREQ;	1450	dREQ;
1559		1451
1560	req->type = REQ_GROUP;	1452	req->type = EIO_GROUP;
		1453
1561	req_send (req);	1454	req_submit (req);
1562
1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1455	XPUSHs (req_sv (req, aio_grp_stash));
1564	}	1456	}
1565		1457
1566	void	1458	void
1567	aio_nop (callback=&PL_sv_undef)	1459	aio_nop (SV *callback=&PL_sv_undef)
1568	SV * callback	1460	ALIAS:
		1461	aio_nop = EIO_NOP
		1462	aio_sync = EIO_SYNC
1569	PPCODE:	1463	PPCODE:
1570	{	1464	{
1571	dREQ;	1465	dREQ;
1572		1466
1573	req->type = REQ_NOP;	1467	req->type = ix;
1574		1468
1575	REQ_SEND;	1469	REQ_SEND;
1576	}	1470	}
1577		1471
1578	int	1472	int
1579	aioreq_pri (int pri = 0)	1473	aioreq_pri (int pri = 0)
1580	PROTOTYPE: ;$
1581	CODE:	1474	CODE:
1582	RETVAL = next_pri - PRI_BIAS;	1475	RETVAL = next_pri;
1583	if (items > 0)	1476	if (items > 0)
1584	{	1477	{
1585	if (pri < PRI_MIN) pri = PRI_MIN;	1478	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1586	if (pri > PRI_MAX) pri = PRI_MAX;	1479	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1587	next_pri = pri + PRI_BIAS;	1480	next_pri = pri;
1588	}	1481	}
1589	OUTPUT:	1482	OUTPUT:
1590	RETVAL	1483	RETVAL
1591		1484
1592	void	1485	void
1593	aioreq_nice (int nice = 0)	1486	aioreq_nice (int nice = 0)
1594	CODE:	1487	CODE:
1595	nice = next_pri - nice;	1488	nice = next_pri - nice;
1596	if (nice < PRI_MIN) nice = PRI_MIN;	1489	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1597	if (nice > PRI_MAX) nice = PRI_MAX;	1490	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1598	next_pri = nice + PRI_BIAS;	1491	next_pri = nice;
1599		1492
1600	void	1493	void
1601	flush ()	1494	flush ()
1602	PROTOTYPE:
1603	CODE:	1495	CODE:
1604	while (nreqs)	1496	while (eio_nreqs ())
1605	{	1497	{
1606	poll_wait ();	1498	poll_wait ();
1607	poll_cb (0);	1499	poll_cb ();
1608	}	1500	}
1609		1501
1610	void
1611	poll()
1612	PROTOTYPE:
1613	CODE:
1614	if (nreqs)
1615	{
1616	poll_wait ();
1617	poll_cb (0);
1618	}
1619
1620	int	1502	int
1621	poll_fileno()	1503	poll ()
1622	PROTOTYPE:
1623	CODE:	1504	CODE:
1624	RETVAL = respipe [0];	1505	poll_wait ();
1625	OUTPUT:
1626	RETVAL
1627
1628	int
1629	poll_cb(...)
1630	PROTOTYPE:
1631	CODE:
1632	RETVAL = poll_cb ();	1506	RETVAL = poll_cb ();
1633	OUTPUT:	1507	OUTPUT:
1634	RETVAL	1508	RETVAL
1635		1509
1636	void
1637	poll_wait()
1638	PROTOTYPE:
1639	CODE:
1640	if (nreqs)
1641	poll_wait ();
1642
1643	int	1510	int
1644	nreqs()	1511	poll_fileno ()
1645	PROTOTYPE:
1646	CODE:	1512	CODE:
1647	RETVAL = nreqs;	1513	RETVAL = s_epipe_fd (&respipe);
1648	OUTPUT:	1514	OUTPUT:
1649	RETVAL	1515	RETVAL
1650		1516
1651	int	1517	int
1652	nready()	1518	poll_cb (...)
1653	PROTOTYPE:	1519	PROTOTYPE:
1654	CODE:	1520	CODE:
1655	RETVAL = get_nready ();	1521	RETVAL = poll_cb ();
1656	OUTPUT:	1522	OUTPUT:
1657	RETVAL	1523	RETVAL
1658		1524
		1525	void
		1526	poll_wait ()
		1527	CODE:
		1528	poll_wait ();
		1529
1659	int	1530	int
1660	npending()	1531	nreqs ()
1661	PROTOTYPE:
1662	CODE:	1532	CODE:
1663	RETVAL = get_npending ();	1533	RETVAL = eio_nreqs ();
1664	OUTPUT:	1534	OUTPUT:
1665	RETVAL	1535	RETVAL
1666		1536
1667	int	1537	int
1668	nthreads()	1538	nready ()
1669	PROTOTYPE:
1670	CODE:	1539	CODE:
1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1540	RETVAL = eio_nready ();
1672	RETVAL = started;
1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1674	OUTPUT:	1541	OUTPUT:
1675	RETVAL	1542	RETVAL
1676		1543
		1544	int
		1545	npending ()
		1546	CODE:
		1547	RETVAL = eio_npending ();
		1548	OUTPUT:
		1549	RETVAL
		1550
		1551	int
		1552	nthreads ()
		1553	CODE:
		1554	RETVAL = eio_nthreads ();
		1555	OUTPUT:
		1556	RETVAL
		1557
		1558	int
		1559	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1560	CODE:
		1561	RETVAL = posix_fadvise (fh, offset, length, advice);
		1562	OUTPUT:
		1563	RETVAL
		1564
		1565	ssize_t
		1566	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1567	CODE:
		1568	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1569	OUTPUT:
		1570	RETVAL
		1571
		1572	void
		1573	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1574	PPCODE:
		1575	sv_unmagic (scalar, MMAP_MAGIC);
		1576	{
		1577	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1578	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1579	if (addr == (void *)-1)
		1580	XSRETURN_NO;
		1581
		1582	sv_force_normal (scalar);
		1583
		1584	/* we store the length in mg_obj, as namlen is I32 :/ */
		1585	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1586	->mg_obj = (SV *)length;
		1587
		1588	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1589
		1590	if (!(prot & PROT_WRITE))
		1591	SvREADONLY_on (scalar);
		1592
		1593	if (SvLEN (scalar))
		1594	Safefree (SvPVX (scalar));
		1595
		1596	SvPVX (scalar) = (char *)addr;
		1597	SvCUR_set (scalar, length);
		1598	SvLEN_set (scalar, 0);
		1599	SvPOK_only (scalar);
		1600
		1601	XSRETURN_YES;
		1602	}
		1603
		1604	void
		1605	munmap (SV *scalar)
		1606	CODE:
		1607	sv_unmagic (scalar, MMAP_MAGIC);
		1608
		1609	int
		1610	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1611	ALIAS:
		1612	mprotect = 1
		1613	CODE:
		1614	{
		1615	STRLEN svlen;
		1616	void *addr = SvPVbyte (scalar, svlen);
		1617	size_t len = SvUV (length);
		1618
		1619	if (offset < 0)
		1620	offset += svlen;
		1621
		1622	if (offset < 0 || offset > svlen)
		1623	croak ("offset outside of scalar");
		1624
		1625	if (!SvOK (length) || len + offset > svlen)
		1626	len = svlen - offset;
		1627
		1628	addr = (void *)(((intptr_t)addr) + offset);
		1629	eio_page_align (&addr, &len);
		1630
		1631	switch (ix)
		1632	{
		1633	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1634	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1635	}
		1636	}
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	int
		1641	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1642	CODE:
		1643	{
		1644	STRLEN svlen;
		1645	void *addr = SvPVbyte (scalar, svlen);
		1646	size_t len = SvUV (length);
		1647
		1648	if (offset < 0)
		1649	offset += svlen;
		1650
		1651	if (offset < 0 || offset > svlen)
		1652	croak ("offset outside of scalar");
		1653
		1654	if (!SvOK (length) || len + offset > svlen)
		1655	len = svlen - offset;
		1656
		1657	addr = (void *)(((intptr_t)addr) + offset);
		1658	eio_page_align (&addr, &len);
		1659	#if _POSIX_MEMLOCK_RANGE
		1660	RETVAL = munlock (addr, len);
		1661	#else
		1662	RETVAL = ((errno = ENOSYS), -1);
		1663	#endif
		1664	}
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	int
		1669	munlockall ()
		1670	CODE:
		1671	#if _POSIX_MEMLOCK
		1672	munlockall ();
		1673	#else
		1674	RETVAL = -1;
		1675	errno = ENOSYS;
		1676	#endif
		1677	OUTPUT:
		1678	RETVAL
		1679
		1680	void _on_next_submit (SV *cb)
		1681	CODE:
		1682	SvREFCNT_dec (on_next_submit);
		1683	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1684
1677	PROTOTYPES: DISABLE	1685	PROTOTYPES: DISABLE
1678		1686
1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1687	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1680		1688
1681	void	1689	void
1682	cancel (aio_req_ornot req)	1690	cancel (aio_req_ornot req)
1683	CODE:	1691	CODE:
1684	req_cancel (req);	1692	eio_cancel (req);
1685		1693
1686	void	1694	void
1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1695	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1688	CODE:	1696	PPCODE:
		1697	{
		1698	if (GIMME_V != G_VOID)
		1699	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1700
		1701	if (items > 1)
		1702	{
		1703	SV *cb_cv =get_cb (callback);
		1704
1689	SvREFCNT_dec (req->callback);	1705	SvREFCNT_dec (req->callback);
1690	req->callback = newSVsv (callback);	1706	req->callback = SvREFCNT_inc (cb_cv);
		1707	}
		1708	}
1691		1709
1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1710	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1693		1711
1694	void	1712	void
1695	add (aio_req grp, ...)	1713	add (aio_req grp, ...)
1696	PPCODE:	1714	PPCODE:
1697	{	1715	{
1698	int i;	1716	int i;
1699	aio_req req;
1700		1717
1701	if (grp->fd == 2)	1718	if (grp->int1 == 2)
1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1719	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1703		1720
1704	for (i = 1; i < items; ++i )	1721	for (i = 1; i < items; ++i )
1705	{	1722	{
		1723	aio_req req;
		1724
1706	if (GIMME_V != G_VOID)	1725	if (GIMME_V != G_VOID)
1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1726	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1708		1727
1709	req = SvAIO_REQ (ST (i));	1728	req = SvAIO_REQ (ST (i));
1710		1729
1711	if (req)	1730	if (req)
1712	{	1731	eio_grp_add (grp, req);
1713	++grp->length;
1714	req->grp = grp;
1715
1716	req->grp_prev = 0;
1717	req->grp_next = grp->grp_first;
1718
1719	if (grp->grp_first)
1720	grp->grp_first->grp_prev = req;
1721
1722	grp->grp_first = req;
1723	}
1724	}	1732	}
1725	}	1733	}
1726		1734
1727	void	1735	void
1728	cancel_subs (aio_req_ornot req)	1736	cancel_subs (aio_req_ornot req)
…		…
1737	AV *av;	1745	AV *av;
1738		1746
1739	grp->errorno = errno;	1747	grp->errorno = errno;
1740		1748
1741	av = newAV ();	1749	av = newAV ();
		1750	av_extend (av, items - 1);
1742		1751
1743	for (i = 1; i < items; ++i )	1752	for (i = 1; i < items; ++i )
1744	av_push (av, newSVsv (ST (i)));	1753	av_push (av, newSVsv (ST (i)));
1745		1754
1746	SvREFCNT_dec (grp->data);	1755	SvREFCNT_dec (grp->sv1);
1747	grp->data = (SV *)av;	1756	grp->sv1 = (SV *)av;
1748	}	1757	}
1749		1758
1750	void	1759	void
1751	errno (aio_req grp, int errorno = errno)	1760	errno (aio_req grp, int errorno = errno)
1752	CODE:	1761	CODE:
1753	grp->errorno = errorno;	1762	grp->errorno = errorno;
1754		1763
1755	void	1764	void
1756	limit (aio_req grp, int limit)	1765	limit (aio_req grp, int limit)
1757	CODE:	1766	CODE:
1758	grp->fd2 = limit;	1767	eio_grp_limit (grp, limit);
1759	aio_grp_feed (grp);
1760		1768
1761	void	1769	void
1762	feed (aio_req grp, SV *callback=&PL_sv_undef)	1770	feed (aio_req grp, SV *callback=&PL_sv_undef)
1763	CODE:	1771	CODE:
1764	{	1772	{
1765	SvREFCNT_dec (grp->fh2);	1773	SvREFCNT_dec (grp->sv2);
1766	grp->fh2 = newSVsv (callback);	1774	grp->sv2 = newSVsv (callback);
		1775	grp->feed = aio_grp_feed;
1767		1776
1768	if (grp->fd2 <= 0)	1777	if (grp->int2 <= 0)
1769	grp->fd2 = 2;	1778	grp->int2 = 2;
1770		1779
1771	aio_grp_feed (grp);	1780	eio_grp_limit (grp, grp->int2);
1772	}	1781	}
1773		1782

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