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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.93 by root, Wed Nov 8 02:01:02 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); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		320
92	typedef SV SV8; /* byte-sv, used for argument-checking */	321	static int req_invoke (eio_req *req);
		322	#define EIO_FINISH(req) req_invoke (req)
		323	static void req_destroy (eio_req *grp);
		324	#define EIO_DESTROY(req) req_destroy (req)
93		325
94	enum {	326	enum {
95	REQ_QUIT,	327	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	};	328	};
107		329
108	#define AIO_REQ_KLASS "IO::AIO::REQ"	330	#include "libeio/eio.c"
109	#define AIO_GRP_KLASS "IO::AIO::GRP"
110		331
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;	332	typedef eio_req *aio_req;
142	typedef aio_cb *aio_req_ornot;	333	typedef eio_req *aio_req_ornot;
143		334
144	enum {	335	static SV *on_next_submit;
145	PRI_MIN = -4,	336	static int next_pri = EIO_PRI_DEFAULT;
146	PRI_MAX = 4,	337	static int max_outstanding;
147		338
148	DEFAULT_PRI = 0,	339	static s_epipe respipe;
149	PRI_BIAS = -PRI_MIN,
150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151	};
152		340
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);	341	static void req_destroy (aio_req req);
327	static void req_cancel (aio_req req);	342	static void req_cancel (aio_req req);
328		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
329	/* must be called at most once */	356	/* must be called at most once */
330	static SV *req_sv (aio_req req, const char *klass)	357	static SV *req_sv (aio_req req, HV *stash)
331	{	358	{
332	if (!req->self)	359	if (!req->self)
333	{	360	{
334	req->self = (SV *)newHV ();	361	req->self = (SV *)newHV ();
335	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
336	}	363	}
337		364
338	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
339	}	366	}
340		367
341	static aio_req SvAIO_REQ (SV *sv)	368	static aio_req SvAIO_REQ (SV *sv)
342	{	369	{
343	MAGIC *mg;	370	MAGIC *mg;
344		371
345	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")))
346	croak ("object of class " AIO_REQ_KLASS " expected");	376	croak ("object of class IO::AIO::REQ expected");
347		377
348	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
349		379
350	return mg ? (aio_req)mg->mg_ptr : 0;	380	return mg ? (aio_req)mg->mg_ptr : 0;
351	}	381	}
352		382
353	static void aio_grp_feed (aio_req grp)	383	static void aio_grp_feed (aio_req grp)
354	{	384	{
355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	385	if (grp->sv2 && SvOK (grp->sv2))
356	{	386	{
357	int old_len = grp->size;
358
359	if (grp->sv2 && SvOK (grp->sv2))
360	{
361	dSP;	387	dSP;
362		388
363	ENTER;	389	ENTER;
364	SAVETMPS;	390	SAVETMPS;
365	PUSHMARK (SP);	391	PUSHMARK (SP);
366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	392	XPUSHs (req_sv (grp, aio_grp_stash));
367	PUTBACK;	393	PUTBACK;
368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369	SPAGAIN;	395	SPAGAIN;
370	FREETMPS;	396	FREETMPS;
371	LEAVE;	397	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	}	398	}
382	}	399	}
383		400
384	static void aio_grp_dec (aio_req grp)	401	static void req_submit (eio_req *req)
385	{	402	{
386	--grp->size;	403	eio_submit (req);
387		404
388	/* call feeder, if applicable */	405	if (expect_false (on_next_submit))
389	aio_grp_feed (grp);
390
391	/* finish, if done */
392	if (!grp->size && grp->int1)
393	{	406	{
394	req_invoke (grp);	407	dSP;
395	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);
396	}	415	}
397	}	416	}
398		417
399	static void req_invoke (aio_req req)	418	static int req_invoke (eio_req *req)
400	{	419	{
401	dSP;
402
403	if (req->flags & FLAG_SV1_RO_OFF)	420	if (req->flags & FLAG_SV2_RO_OFF)
404	SvREADONLY_off (req->sv1);	421	SvREADONLY_off (req->sv2);
405		422
406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	423	if (!EIO_CANCELLED (req) && req->callback)
407	{	424	{
		425	dSP;
		426	static SV *sv_result_cache; /* caches the result integer SV */
		427	SV *sv_result;
		428
408	ENTER;	429	ENTER;
409	SAVETMPS;	430	SAVETMPS;
410	PUSHMARK (SP);	431	PUSHMARK (SP);
411	EXTEND (SP, 1);	432	EXTEND (SP, 1);
412		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
413	switch (req->type)	447	switch (req->type)
414	{	448	{
415	case REQ_READDIR:	449	case EIO_READDIR:
416	{	450	{
417	SV *rv = &PL_sv_undef;	451	SV *rv = &PL_sv_undef;
418		452
419	if (req->result >= 0)	453	if (req->result >= 0)
420	{	454	{
421	int i;	455	int i;
422	char *buf = req->ptr2;	456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
423	AV *av = newAV ();	458	AV *av = newAV ();
424		459
425	av_extend (av, req->result - 1);	460	av_extend (av, req->result - 1);
426		461
427	for (i = 0; i < req->result; ++i)	462	for (i = 0; i < req->result; ++i)
428	{	463	{
429	SV *sv = newSVpv (buf, 0);	464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
430		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
431	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);
432	buf += SvCUR (sv) + 1;	496	names += SvCUR (name) + 1;
		497	}
433	}	498	}
434		499
435	rv = sv_2mortal (newRV_noinc ((SV *)av));	500	rv = sv_2mortal (newRV_noinc ((SV *)av));
436	}	501	}
437		502
438	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))));
439	}	507	}
440	break;	508	break;
441		509
442	case REQ_OPEN:	510	case EIO_OPEN:
443	{	511	{
444	/* convert fd to fh */	512	/* convert fd to fh */
445	SV *fh;	513	SV *fh = &PL_sv_undef;
446		514
447	PUSHs (sv_2mortal (newSViv (req->result)));	515	if (req->result >= 0)
448	PUTBACK;	516	{
449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	517	GV *gv = (GV *)sv_newmortal ();
450	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);
451		524
452	fh = POPs;	525	symlen = snprintf (
453	PUSHMARK (SP);	526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
454	XPUSHs (fh);	537	PUSHs (fh);
455	}	538	}
456	break;	539	break;
457		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
458	case REQ_GROUP:	571	case EIO_GROUP:
459	req->int1 = 2; /* mark group as finished */	572	req->int1 = 2; /* mark group as finished */
460		573
461	if (req->sv1)	574	if (req->sv1)
462	{	575	{
463	int i;	576	int i;
…		…
467	for (i = 0; i <= AvFILL (av); ++i)	580	for (i = 0; i <= AvFILL (av); ++i)
468	PUSHs (*av_fetch (av, i, 0));	581	PUSHs (*av_fetch (av, i, 0));
469	}	582	}
470	break;	583	break;
471		584
472	case REQ_NOP:	585	case EIO_NOP:
473	case REQ_BUSY:	586	case EIO_BUSY:
474	break;	587	break;
475		588
476	case REQ_READLINK:	589	case EIO_READLINK:
477	if (req->result > 0)	590	if (req->result > 0)
478	{	591	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
479	SvCUR_set (req->sv1, req->result);
480	*SvEND (req->sv1) = 0;
481	PUSHs (req->sv1);
482	}
483	break;	592	break;
484		593
485	case REQ_STAT:	594	case EIO_STAT:
486	case REQ_LSTAT:	595	case EIO_LSTAT:
487	case REQ_FSTAT:	596	case EIO_FSTAT:
488	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	597	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
489	PL_laststatval = req->result;	598	PL_laststatval = req->result;
490	PL_statcache = *(Stat_t *)(req->ptr2);	599	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
491	PUSHs (sv_2mortal (newSViv (req->result)));	600	PUSHs (sv_result);
492	break;	601	break;
493		602
494	case REQ_READ:	603	case EIO_READ:
		604	{
495	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	605	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
496	*SvEND (req->sv1) = 0;	606	*SvEND (req->sv2) = 0;
497	PUSHs (sv_2mortal (newSViv (req->result)));	607	SvPOK_only (req->sv2);
		608	SvSETMAGIC (req->sv2);
		609	PUSHs (sv_result);
		610	}
498	break;	611	break;
499		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
500	default:	618	default:
501	PUSHs (sv_2mortal (newSViv (req->result)));	619	PUSHs (sv_result);
502	break;	620	break;
503	}	621	}
504		622
505	errno = req->errorno;	623	errno = req->errorno;
506		624
507	PUTBACK;	625	PUTBACK;
508	call_sv (req->callback, G_VOID | G_EVAL);	626	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
509	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;
510		633
511	FREETMPS;	634	FREETMPS;
512	LEAVE;	635	LEAVE;
		636
		637	PUTBACK;
513	}	638	}
514		639
515	if (req->grp)	640	return !!SvTRUE (ERRSV);
516	{
517	aio_req grp = req->grp;
518
519	/* unlink request */
520	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
521	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
522
523	if (grp->grp_first == req)
524	grp->grp_first = req->grp_next;
525
526	aio_grp_dec (grp);
527	}
528
529	if (SvTRUE (ERRSV))
530	{
531	req_free (req);
532	croak (0);
533	}
534	}	641	}
535		642
536	static void req_free (aio_req req)	643	static void req_destroy (aio_req req)
537	{	644	{
538	if (req->self)	645	if (req->self)
539	{	646	{
540	sv_unmagic (req->self, PERL_MAGIC_ext);	647	sv_unmagic (req->self, PERL_MAGIC_ext);
541	SvREFCNT_dec (req->self);	648	SvREFCNT_dec (req->self);
542	}	649	}
543		650
544	SvREFCNT_dec (req->fh);
545	SvREFCNT_dec (req->sv1);	651	SvREFCNT_dec (req->sv1);
546	SvREFCNT_dec (req->sv2);	652	SvREFCNT_dec (req->sv2);
547	SvREFCNT_dec (req->callback);	653	SvREFCNT_dec (req->callback);
548		654
549	if (req->flags & FLAG_PTR2_FREE)
550	free (req->ptr2);
551
552	Safefree (req);	655	Safefree (req);
553	}	656	}
554		657
555	static void req_cancel_subs (aio_req grp)	658	static void req_cancel_subs (aio_req grp)
556	{	659	{
557	aio_req sub;	660	aio_req sub;
558		661
559	if (grp->type != REQ_GROUP)	662	if (grp->type != EIO_GROUP)
560	return;	663	return;
561		664
562	SvREFCNT_dec (grp->sv2);	665	SvREFCNT_dec (grp->sv2);
563	grp->sv2 = 0;	666	grp->sv2 = 0;
564		667
565	for (sub = grp->grp_first; sub; sub = sub->grp_next)	668	eio_grp_cancel (grp);
566	req_cancel (sub);
567	}	669	}
568		670
569	static void req_cancel (aio_req req)	671	static void
		672	create_respipe (void)
570	{	673	{
571	req->flags |= FLAG_CANCELLED;	674	if (s_epipe_renew (&respipe))
572		675	croak ("IO::AIO: unable to initialize result pipe");
573	req_cancel_subs (req);
574	}	676	}
575		677
576	static void *aio_proc(void *arg);
577
578	static void start_thread (void)
579	{
580	sigset_t fullsigset, oldsigset;
581	pthread_attr_t attr;
582
583	worker *wrk = calloc (1, sizeof (worker));
584
585	if (!wrk)
586	croak ("unable to allocate worker thread data");
587
588	pthread_attr_init (&attr);
589	pthread_attr_setstacksize (&attr, STACKSIZE);
590	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
591	#ifdef PTHREAD_SCOPE_PROCESS
592	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
593	#endif
594
595	sigfillset (&fullsigset);
596
597	LOCK (wrklock);
598	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
599
600	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
601	{
602	wrk->prev = &wrk_first;
603	wrk->next = wrk_first.next;
604	wrk_first.next->prev = wrk;
605	wrk_first.next = wrk;
606	++started;
607	}
608	else
609	free (wrk);
610
611	sigprocmask (SIG_SETMASK, &oldsigset, 0);
612	UNLOCK (wrklock);
613	}
614
615	static void maybe_start_thread ()
616	{
617	if (get_nthreads () >= wanted)
618	return;
619
620	/* todo: maybe use idle here, but might be less exact */
621	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
622	return;
623
624	start_thread ();
625	}
626
627	static void req_send (aio_req req)
628	{
629	++nreqs;
630
631	LOCK (reqlock);
632	++nready;
633	reqq_push (&req_queue, req);
634	pthread_cond_signal (&reqwait);
635	UNLOCK (reqlock);
636
637	maybe_start_thread ();
638	}
639
640	static void end_thread (void)
641	{
642	aio_req req;
643
644	Newz (0, req, 1, aio_cb);
645
646	req->type = REQ_QUIT;
647	req->pri = PRI_MAX + PRI_BIAS;
648
649	LOCK (reqlock);
650	reqq_push (&req_queue, req);
651	pthread_cond_signal (&reqwait);
652	UNLOCK (reqlock);
653
654	LOCK (wrklock);
655	--started;
656	UNLOCK (wrklock);
657	}
658
659	static void set_max_idle (int nthreads)
660	{
661	if (WORDACCESS_UNSAFE) LOCK (reqlock);
662	max_idle = nthreads <= 0 ? 1 : nthreads;
663	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
664	}
665
666	static void min_parallel (int nthreads)
667	{
668	if (wanted < nthreads)
669	wanted = nthreads;
670	}
671
672	static void max_parallel (int nthreads)
673	{
674	if (wanted > nthreads)
675	wanted = nthreads;
676
677	while (started > wanted)
678	end_thread ();
679	}
680
681	static void poll_wait ()	678	static void poll_wait (void)
682	{	679	{
683	fd_set rfd;
684
685	while (nreqs)	680	while (eio_nreqs ())
686	{	681	{
687	int size;	682	int size;
688	if (WORDACCESS_UNSAFE) LOCK (reslock);	683
		684	X_LOCK (reslock);
689	size = res_queue.size;	685	size = res_queue.size;
690	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	686	X_UNLOCK (reslock);
691		687
692	if (size)	688	if (size)
693	return;	689	return;
694		690
695	maybe_start_thread ();	691	etp_maybe_start_thread ();
696		692
697	FD_ZERO(&rfd);	693	s_epipe_wait (&respipe);
698	FD_SET(respipe [0], &rfd);
699
700	select (respipe [0] + 1, &rfd, 0, 0, 0);
701	}	694	}
702	}	695	}
703		696
704	static int poll_cb ()	697	static int poll_cb (void)
705	{	698	{
706	dSP;
707	int count = 0;
708	int maxreqs = max_poll_reqs;
709	int do_croak = 0;
710	struct timeval tv_start, tv_now;
711	aio_req req;
712
713	if (max_poll_time)
714	gettimeofday (&tv_start, 0);
715
716	for (;;)	699	for (;;)
717	{	700	{
718	for (;;)	701	int res = eio_poll ();
719	{
720	maybe_start_thread ();
721		702
722	LOCK (reslock);	703	if (res > 0)
723	req = reqq_shift (&res_queue);
724
725	if (req)
726	{
727	--npending;
728
729	if (!res_queue.size)
730	{
731	/* read any signals sent by the worker threads */
732	char buf [32];
733	while (read (respipe [0], buf, 32) == 32)
734	;
735	}
736	}
737
738	UNLOCK (reslock);
739
740	if (!req)
741	break;
742
743	--nreqs;
744
745	if (req->type == REQ_GROUP && req->size)
746	{
747	req->int1 = 1; /* mark request as delayed */
748	continue;
749	}
750	else
751	{
752	req_invoke (req);
753
754	count++;
755	}
756
757	req_free (req);
758
759	if (maxreqs && !--maxreqs)
760	break;
761
762	if (max_poll_time)
763	{
764	gettimeofday (&tv_now, 0);
765
766	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
767	break;
768	}
769	}
770
771	if (nreqs <= max_outstanding)
772	break;	704	croak (0);
		705
		706	if (!max_outstanding || max_outstanding > eio_nreqs ())
		707	return res;
773		708
774	poll_wait ();	709	poll_wait ();
775
776	++maxreqs;
777	}	710	}
778
779	return count;
780	}	711	}
781		712
782	static void create_pipe ()	713	static void atfork_child (void)
783	{	714	{
784	if (pipe (respipe))	715	create_respipe ();
785	croak ("unable to initialize result pipe");
786
787	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
788	croak ("cannot set result pipe to nonblocking mode");
789
790	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
791	croak ("cannot set result pipe to nonblocking mode");
792	}	716	}
793		717
794	/*****************************************************************************/	718	/*****************************************************************************/
795	/* work around various missing functions */
796		719
797	#if !HAVE_PREADWRITE	720	#if !_POSIX_MAPPED_FILES
798	# define pread aio_pread	721	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
799	# define pwrite aio_pwrite	722	# define munmap(addr,length) (errno = ENOSYS, -1)
800
801	/*
802	* make our pread/pwrite safe against themselves, but not against
803	* normal read/write by using a mutex. slows down execution a lot,
804	* but that's your problem, not mine.
805	*/
806	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
807
808	static ssize_t pread (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 = read (fd, buf, count);
817	lseek (fd, ooffset, SEEK_SET);
818	UNLOCK (preadwritelock);
819
820	return res;
821	}
822
823	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
824	{
825	ssize_t res;
826	off_t ooffset;
827
828	LOCK (preadwritelock);
829	ooffset = lseek (fd, 0, SEEK_CUR);
830	lseek (fd, offset, SEEK_SET);
831	res = write (fd, buf, count);
832	lseek (fd, offset, SEEK_SET);
833	UNLOCK (preadwritelock);
834
835	return res;
836	}
837	#endif
838
839	#if !HAVE_FDATASYNC
840	# define fdatasync fsync
841	#endif
842
843	#if !HAVE_READAHEAD
844	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
845
846	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
847	{
848	dBUF;
849
850	while (count > 0)
851	{
852	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
853
854	pread (fd, aio_buf, len, offset);
855	offset += len;
856	count -= len;
857	}
858
859	errno = 0;
860	}
861
862	#endif
863
864	#if !HAVE_READDIR_R
865	# define readdir_r aio_readdir_r
866
867	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
868
869	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
870	{
871	struct dirent *e;
872	int errorno;
873
874	LOCK (readdirlock);
875
876	e = readdir (dirp);
877	errorno = errno;
878
879	if (e)
880	{
881	*res = ent;
882	strcpy (ent->d_name, e->d_name);
883	}
884	else
885	*res = 0;
886
887	UNLOCK (readdirlock);
888
889	errno = errorno;
890	return e ? 0 : -1;
891	}
892	#endif
893
894	/* sendfile always needs emulation */
895	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
896	{
897	ssize_t res;
898
899	if (!count)
900	return 0;
901
902	#if HAVE_SENDFILE
903	# if __linux
904	res = sendfile (ofd, ifd, &offset, count);
905
906	# elif __freebsd
907	/*
908	* Of course, the freebsd sendfile is a dire hack with no thoughts
909	* wasted on making it similar to other I/O functions.
910	*/
911	{
912	off_t sbytes;
913	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
914
915	if (res < 0 && sbytes)
916	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
917	res = sbytes;
918	}
919
920	# elif __hpux
921	res = sendfile (ofd, ifd, offset, count, 0, 0);
922
923	# elif __solaris
924	{
925	struct sendfilevec vec;
926	size_t sbytes;
927
928	vec.sfv_fd = ifd;
929	vec.sfv_flag = 0;
930	vec.sfv_off = offset;
931	vec.sfv_len = count;
932
933	res = sendfilev (ofd, &vec, 1, &sbytes);
934
935	if (res < 0 && sbytes)
936	res = sbytes;
937	}
938
939	# endif	723	#endif
940	#else
941	res = -1;
942	errno = ENOSYS;
943	#endif
944		724
945	if (res < 0	725	#if !_POSIX_MEMORY_PROTECTION
946	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	726	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
947	#if __solaris	727	# define PROT_NONE 0
948	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	728	# define PROT_WRITE 0
		729	# define MAP_PRIVATE 0
		730	# define MAP_SHARED 0
		731	# define MAP_FIXED 0
949	#endif	732	#endif
950	)
951	)
952	{
953	/* emulate sendfile. this is a major pain in the ass */
954	dBUF;
955		733
956	res = 0;	734	#define MMAP_MAGIC PERL_MAGIC_ext
957		735
958	while (count)	736	static int
959	{	737	mmap_free (pTHX_ SV *sv, MAGIC *mg)
960	ssize_t cnt;	738	{
961		739	int old_errno = errno;
962	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;
963		742
964	if (cnt <= 0)	743	mg->mg_obj = 0; /* just in case */
965	{
966	if (cnt && !res) res = -1;
967	break;
968	}
969		744
970	cnt = write (ofd, aio_buf, cnt);	745	SvREADONLY_off (sv);
971		746
972	if (cnt <= 0)	747	if (SvPVX (sv) != mg->mg_ptr)
973	{	748	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
974	if (cnt && !res) res = -1;
975	break;
976	}
977		749
978	offset += cnt;	750	SvCUR_set (sv, 0);
979	res += cnt;	751	SvPVX (sv) = 0;
980	count -= cnt;	752	SvOK_off (sv);
981	}
982	}
983		753
984	return res;	754	return 0;
985	}	755	}
986		756
987	/* read a full directory */	757	static MGVTBL mmap_vtbl = {
988	static void scandir_ (aio_req req, worker *self)	758	0, 0, 0, 0, mmap_free
989	{	759	};
990	DIR *dirp;
991	union
992	{
993	struct dirent d;
994	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
995	} *u;
996	struct dirent *entp;
997	char *name, *names;
998	int memlen = 4096;
999	int memofs = 0;
1000	int res = 0;
1001	int errorno;
1002
1003	LOCK (wrklock);
1004	self->dirp = dirp = opendir (req->ptr1);
1005	self->dbuf = u = malloc (sizeof (*u));
1006	req->flags |= FLAG_PTR2_FREE;
1007	req->ptr2 = names = malloc (memlen);
1008	UNLOCK (wrklock);
1009
1010	if (dirp && u && names)
1011	for (;;)
1012	{
1013	errno = 0;
1014	readdir_r (dirp, &u->d, &entp);
1015
1016	if (!entp)
1017	break;
1018
1019	name = entp->d_name;
1020
1021	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1022	{
1023	int len = strlen (name) + 1;
1024
1025	res++;
1026
1027	while (memofs + len > memlen)
1028	{
1029	memlen *= 2;
1030	LOCK (wrklock);
1031	req->ptr2 = names = realloc (names, memlen);
1032	UNLOCK (wrklock);
1033
1034	if (!names)
1035	break;
1036	}
1037
1038	memcpy (names + memofs, name, len);
1039	memofs += len;
1040	}
1041	}
1042
1043	if (errno)
1044	res = -1;
1045
1046	req->result = res;
1047	}
1048		760
1049	/*****************************************************************************/	761	/*****************************************************************************/
1050		762
1051	static void *aio_proc (void *thr_arg)	763	static SV *
		764	get_cb (SV *cb_sv)
1052	{	765	{
1053	aio_req req;	766	SvGETMAGIC (cb_sv);
1054	struct timespec ts;	767	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1055	worker *self = (worker *)thr_arg;
1056
1057	/* try to distribute timeouts somewhat evenly */
1058	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1059	* (1000000000UL / 1024UL);
1060
1061	for (;;)
1062	{
1063	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1064
1065	LOCK (reqlock);
1066
1067	for (;;)
1068	{
1069	self->req = req = reqq_shift (&req_queue);
1070
1071	if (req)
1072	break;
1073
1074	++idle;
1075
1076	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1077	== ETIMEDOUT)
1078	{
1079	if (idle > max_idle)
1080	{
1081	--idle;
1082	UNLOCK (reqlock);
1083	LOCK (wrklock);
1084	--started;
1085	UNLOCK (wrklock);
1086	goto quit;
1087	}
1088
1089	/* we are allowed to idle, so do so without any timeout */
1090	pthread_cond_wait (&reqwait, &reqlock);
1091	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1092	}
1093
1094	--idle;
1095	}
1096
1097	--nready;
1098
1099	UNLOCK (reqlock);
1100
1101	errno = 0; /* strictly unnecessary */
1102
1103	if (!(req->flags & FLAG_CANCELLED))
1104	switch (req->type)
1105	{
1106	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1107	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1108
1109	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1110	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1111
1112	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1113	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1114	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1115
1116	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1117	case REQ_CLOSE: req->result = close (req->int1); break;
1118	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1119	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1120	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1121	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1122	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1123	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1124	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1125
1126	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1127	case REQ_FSYNC: req->result = fsync (req->int1); break;
1128	case REQ_READDIR: scandir_ (req, self); break;
1129
1130	case REQ_BUSY:
1131	{
1132	struct timeval tv;
1133
1134	tv.tv_sec = req->int1;
1135	tv.tv_usec = req->int2;
1136
1137	req->result = select (0, 0, 0, 0, &tv);
1138	}
1139
1140	case REQ_GROUP:
1141	case REQ_NOP:
1142	break;
1143
1144	case REQ_QUIT:
1145	goto quit;
1146
1147	default:
1148	req->result = ENOSYS;
1149	break;
1150	}
1151
1152	req->errorno = errno;
1153
1154	LOCK (reslock);
1155
1156	++npending;
1157
1158	if (!reqq_push (&res_queue, req))
1159	/* write a dummy byte to the pipe so fh becomes ready */
1160	write (respipe [1], &respipe, 1);
1161
1162	self->req = 0;
1163	worker_clear (self);
1164
1165	UNLOCK (reslock);
1166	}
1167
1168	quit:
1169	LOCK (wrklock);
1170	worker_free (self);
1171	UNLOCK (wrklock);
1172
1173	return 0;
1174	}
1175
1176	/*****************************************************************************/
1177
1178	static void atfork_prepare (void)
1179	{
1180	LOCK (wrklock);
1181	LOCK (reqlock);
1182	LOCK (reslock);
1183	#if !HAVE_PREADWRITE
1184	LOCK (preadwritelock);
1185	#endif
1186	#if !HAVE_READDIR_R
1187	LOCK (readdirlock);
1188	#endif
1189	}
1190
1191	static void atfork_parent (void)
1192	{
1193	#if !HAVE_READDIR_R
1194	UNLOCK (readdirlock);
1195	#endif
1196	#if !HAVE_PREADWRITE
1197	UNLOCK (preadwritelock);
1198	#endif
1199	UNLOCK (reslock);
1200	UNLOCK (reqlock);
1201	UNLOCK (wrklock);
1202	}
1203
1204	static void atfork_child (void)
1205	{
1206	aio_req prv;
1207
1208	while (prv = reqq_shift (&req_queue))
1209	req_free (prv);
1210
1211	while (prv = reqq_shift (&res_queue))
1212	req_free (prv);
1213
1214	while (wrk_first.next != &wrk_first)
1215	{
1216	worker *wrk = wrk_first.next;
1217
1218	if (wrk->req)
1219	req_free (wrk->req);
1220
1221	worker_clear (wrk);
1222	worker_free (wrk);
1223	}
1224
1225	started = 0;
1226	idle = 0;
1227	nreqs = 0;
1228	nready = 0;
1229	npending = 0;
1230
1231	close (respipe [0]);
1232	close (respipe [1]);
1233	create_pipe ();
1234
1235	atfork_parent ();
1236	}	768	}
1237		769
1238	#define dREQ \	770	#define dREQ \
		771	SV *cb_cv; \
1239	aio_req req; \	772	aio_req req; \
1240	int req_pri = next_pri; \	773	int req_pri = next_pri; \
1241	next_pri = DEFAULT_PRI + PRI_BIAS; \	774	next_pri = EIO_PRI_DEFAULT; \
1242	\	775	\
1243	if (SvOK (callback) && !SvROK (callback)) \	776	cb_cv = get_cb (callback); \
1244	croak ("callback must be undef or of reference type"); \
1245	\	777	\
1246	Newz (0, req, 1, aio_cb); \	778	Newz (0, req, 1, eio_req); \
1247	if (!req) \	779	if (!req) \
1248	croak ("out of memory during aio_req allocation"); \	780	croak ("out of memory during eio_req allocation"); \
1249	\	781	\
1250	req->callback = newSVsv (callback); \	782	req->callback = SvREFCNT_inc (cb_cv); \
1251	req->pri = req_pri	783	req->pri = req_pri
1252		784
1253	#define REQ_SEND \	785	#define REQ_SEND \
		786	PUTBACK; \
1254	req_send (req); \	787	req_submit (req); \
		788	SPAGAIN; \
1255	\	789	\
1256	if (GIMME_V != G_VOID) \	790	if (GIMME_V != G_VOID) \
1257	XPUSHs (req_sv (req, AIO_REQ_KLASS));	791	XPUSHs (req_sv (req, aio_req_stash));
1258		792
1259	MODULE = IO::AIO PACKAGE = IO::AIO	793	MODULE = IO::AIO PACKAGE = IO::AIO
1260		794
1261	PROTOTYPES: ENABLE	795	PROTOTYPES: ENABLE
1262		796
1263	BOOT:	797	BOOT:
1264	{	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
1265	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);
1266		917
1267	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	918	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1268	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	919	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1269	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1270	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1271	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1272	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1273		920
		921	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		922
1274	create_pipe ();	923	create_respipe ();
1275	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1276	}
1277		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
1278	void	932	void
1279	max_poll_reqs (int nreqs)	933	max_poll_reqs (unsigned int nreqs)
1280	PROTOTYPE: $	934	PROTOTYPE: $
1281	CODE:	935	CODE:
1282	max_poll_reqs = nreqs;	936	eio_set_max_poll_reqs (nreqs);
1283		937
1284	void	938	void
1285	max_poll_time (double nseconds)	939	max_poll_time (double nseconds)
1286	PROTOTYPE: $	940	PROTOTYPE: $
1287	CODE:	941	CODE:
1288	max_poll_time = nseconds * AIO_TICKS;	942	eio_set_max_poll_time (nseconds);
1289		943
1290	void	944	void
1291	min_parallel (int nthreads)	945	min_parallel (unsigned int nthreads)
1292	PROTOTYPE: $
1293
1294	void
1295	max_parallel (int nthreads)
1296	PROTOTYPE: $
1297
1298	void
1299	max_idle (int nthreads)
1300	PROTOTYPE: $	946	PROTOTYPE: $
1301	CODE:	947	CODE:
1302	set_max_idle (nthreads);	948	eio_set_min_parallel (nthreads);
1303		949
1304	int	950	void
1305	max_outstanding (int maxreqs)	951	max_parallel (unsigned int nthreads)
1306	PROTOTYPE: $	952	PROTOTYPE: $
1307	CODE:	953	CODE:
1308	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:
1309	max_outstanding = maxreqs;	972	max_outstanding = maxreqs;
1310	OUTPUT:
1311	RETVAL
1312		973
1313	void	974	void
1314	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	975	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1315	SV8 * pathname
1316	int flags
1317	int mode
1318	SV * callback
1319	PROTOTYPE: $$$;$
1320	PPCODE:	976	PPCODE:
1321	{	977	{
1322	dREQ;	978	dREQ;
1323		979
1324	req->type = REQ_OPEN;	980	req->type = EIO_OPEN;
1325	req->sv1 = newSVsv (pathname);	981	req->sv1 = newSVsv (pathname);
1326	req->ptr1 = SvPVbyte_nolen (req->sv1);	982	req->ptr1 = SvPVbyte_nolen (req->sv1);
1327	req->int1 = flags;	983	req->int1 = flags;
1328	req->mode = mode;	984	req->int2 = mode;
1329		985
1330	REQ_SEND;	986	REQ_SEND;
1331	}	987	}
1332		988
1333	void	989	void
1334	aio_close (fh,callback=&PL_sv_undef)	990	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1335	SV * fh
1336	SV * callback
1337	PROTOTYPE: $;$
1338	ALIAS:	991	ALIAS:
1339	aio_close = REQ_CLOSE
1340	aio_fsync = REQ_FSYNC	992	aio_fsync = EIO_FSYNC
1341	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = EIO_FDATASYNC
1342	PPCODE:	994	PPCODE:
1343	{	995	{
		996	int fd = s_fileno_croak (fh, 0);
1344	dREQ;	997	dREQ;
1345		998
1346	req->type = ix;	999	req->type = ix;
1347	req->fh = newSVsv (fh);	1000	req->sv1 = newSVsv (fh);
1348	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1001	req->int1 = fd;
1349		1002
1350	REQ_SEND (req);	1003	REQ_SEND (req);
1351	}	1004	}
1352		1005
1353	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
1354	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)
1355	SV * fh
1356	UV offset
1357	UV length
1358	SV8 * data
1359	UV dataoffset
1360	SV * callback
1361	ALIAS:	1053	ALIAS:
1362	aio_read = REQ_READ	1054	aio_read = EIO_READ
1363	aio_write = REQ_WRITE	1055	aio_write = EIO_WRITE
1364	PROTOTYPE: $$$$$;$
1365	PPCODE:	1056	PPCODE:
1366	{	1057	{
1367	STRLEN svlen;	1058	STRLEN svlen;
		1059	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1368	char *svptr = SvPVbyte (data, svlen);	1060	char *svptr = SvPVbyte (data, svlen);
1369		1061	UV len = SvUV (length);
1370	SvUPGRADE (data, SVt_PV);
1371	SvPOK_on (data);
1372		1062
1373	if (dataoffset < 0)	1063	if (dataoffset < 0)
1374	dataoffset += svlen;	1064	dataoffset += svlen;
1375		1065
1376	if (dataoffset < 0 || dataoffset > svlen)	1066	if (dataoffset < 0 || dataoffset > svlen)
1377	croak ("data offset outside of string");	1067	croak ("dataoffset outside of data scalar");
1378		1068
1379	if (ix == REQ_WRITE)	1069	if (ix == EIO_WRITE)
1380	{	1070	{
1381	/* write: check length and adjust. */	1071	/* write: check length and adjust. */
1382	if (length < 0 || length + dataoffset > svlen)	1072	if (!SvOK (length) || len + dataoffset > svlen)
1383	length = svlen - dataoffset;	1073	len = svlen - dataoffset;
1384	}	1074	}
1385	else	1075	else
1386	{	1076	{
1387	/* read: grow scalar as necessary */	1077	/* read: check type and grow scalar as necessary */
		1078	SvUPGRADE (data, SVt_PV);
1388	svptr = SvGROW (data, length + dataoffset);	1079	svptr = SvGROW (data, len + dataoffset + 1);
1389	}	1080	}
1390
1391	if (length < 0)
1392	croak ("length must not be negative");
1393		1081
1394	{	1082	{
1395	dREQ;	1083	dREQ;
1396		1084
1397	req->type = ix;	1085	req->type = ix;
1398	req->fh = newSVsv (fh);	1086	req->sv1 = newSVsv (fh);
1399	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1087	req->int1 = fd;
1400	: IoOFP (sv_2io (fh)));	1088	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1401	req->offs = offset;
1402	req->size = length;	1089	req->size = len;
1403	req->sv1 = SvREFCNT_inc (data);	1090	req->sv2 = SvREFCNT_inc (data);
1404	req->ptr1 = (char *)svptr + dataoffset;	1091	req->ptr2 = (char *)svptr + dataoffset;
1405	req->stroffset = dataoffset;	1092	req->stroffset = dataoffset;
1406		1093
1407	if (!SvREADONLY (data))	1094	if (!SvREADONLY (data))
1408	{	1095	{
1409	SvREADONLY_on (data);	1096	SvREADONLY_on (data);
1410	req->flags |= FLAG_SV1_RO_OFF;	1097	req->flags |= FLAG_SV2_RO_OFF;
1411	}	1098	}
1412		1099
1413	REQ_SEND;	1100	REQ_SEND;
1414	}	1101	}
1415	}	1102	}
1416		1103
1417	void	1104	void
1418	aio_readlink (path,callback=&PL_sv_undef)	1105	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1419	SV8 * path
1420	SV * callback
1421	PROTOTYPE: $$;$
1422	PPCODE:	1106	PPCODE:
1423	{	1107	{
1424	SV *data;	1108	SV *data;
1425	dREQ;	1109	dREQ;
1426		1110
1427	data = newSV (NAME_MAX);
1428	SvPOK_on (data);
1429
1430	req->type = REQ_READLINK;	1111	req->type = EIO_READLINK;
1431	req->fh = newSVsv (path);	1112	req->sv1 = newSVsv (path);
1432	req->ptr2 = SvPVbyte_nolen (req->fh);	1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
1433	req->sv1 = data;
1434	req->ptr1 = SvPVbyte_nolen (data);
1435		1114
1436	REQ_SEND;	1115	REQ_SEND;
1437	}	1116	}
1438		1117
1439	void	1118	void
1440	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1119	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1441	SV * out_fh
1442	SV * in_fh
1443	UV in_offset
1444	UV length
1445	SV * callback
1446	PROTOTYPE: $$$$;$
1447	PPCODE:	1120	PPCODE:
1448	{	1121	{
		1122	int ifd = s_fileno_croak (in_fh , 0);
		1123	int ofd = s_fileno_croak (out_fh, 1);
1449	dREQ;	1124	dREQ;
1450		1125
1451	req->type = REQ_SENDFILE;	1126	req->type = EIO_SENDFILE;
1452	req->fh = newSVsv (out_fh);	1127	req->sv1 = newSVsv (out_fh);
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1128	req->int1 = ofd;
1454	req->sv2 = newSVsv (in_fh);	1129	req->sv2 = newSVsv (in_fh);
1455	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1130	req->int2 = ifd;
1456	req->offs = in_offset;	1131	req->offs = in_offset;
1457	req->size = length;	1132	req->size = length;
1458		1133
1459	REQ_SEND;	1134	REQ_SEND;
1460	}	1135	}
1461		1136
1462	void	1137	void
1463	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1138	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1464	SV * fh
1465	UV offset
1466	IV length
1467	SV * callback
1468	PROTOTYPE: $$$;$
1469	PPCODE:	1139	PPCODE:
1470	{	1140	{
		1141	int fd = s_fileno_croak (fh, 0);
1471	dREQ;	1142	dREQ;
1472		1143
1473	req->type = REQ_READAHEAD;	1144	req->type = EIO_READAHEAD;
1474	req->fh = newSVsv (fh);	1145	req->sv1 = newSVsv (fh);
1475	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1146	req->int1 = fd;
1476	req->offs = offset;	1147	req->offs = offset;
1477	req->size = length;	1148	req->size = length;
1478		1149
1479	REQ_SEND;	1150	REQ_SEND;
1480	}	1151	}
1481		1152
1482	void	1153	void
1483	aio_stat (fh_or_path,callback=&PL_sv_undef)	1154	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1484	SV8 * fh_or_path
1485	SV * callback
1486	ALIAS:	1155	ALIAS:
1487	aio_stat = REQ_STAT	1156	aio_stat = EIO_STAT
1488	aio_lstat = REQ_LSTAT	1157	aio_lstat = EIO_LSTAT
		1158	aio_statvfs = EIO_STATVFS
1489	PPCODE:	1159	PPCODE:
1490	{	1160	{
1491	dREQ;	1161	dREQ;
1492		1162
1493	req->ptr2 = malloc (sizeof (Stat_t));	1163	req->sv1 = newSVsv (fh_or_path);
1494	if (!req->ptr2)
1495	{
1496	req_free (req);
1497	croak ("out of memory during aio_stat statdata allocation");
1498	}
1499		1164
1500	req->flags |= FLAG_PTR2_FREE;	1165	if (SvPOK (req->sv1))
1501
1502	if (SvPOK (fh_or_path))
1503	{	1166	{
1504	req->type = ix;	1167	req->type = ix;
1505	req->sv1 = newSVsv (fh_or_path);
1506	req->ptr1 = SvPVbyte_nolen (req->sv1);	1168	req->ptr1 = SvPVbyte_nolen (req->sv1);
1507	}	1169	}
1508	else	1170	else
1509	{	1171	{
1510	req->type = REQ_FSTAT;	1172	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1511	req->fh = newSVsv (fh_or_path);
1512	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1173	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1513	}	1174	}
1514		1175
1515	REQ_SEND;	1176	REQ_SEND;
1516	}	1177	}
1517		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
1518	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
1519	aio_unlink (pathname,callback=&PL_sv_undef)	1310	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1520	SV8 * pathname
1521	SV * callback
1522	ALIAS:	1311	ALIAS:
1523	aio_unlink = REQ_UNLINK	1312	aio_unlink = EIO_UNLINK
1524	aio_rmdir = REQ_RMDIR	1313	aio_rmdir = EIO_RMDIR
1525	aio_readdir = REQ_READDIR	1314	aio_readdir = EIO_READDIR
1526	PPCODE:	1315	PPCODE:
1527	{	1316	{
1528	dREQ;	1317	dREQ;
1529		1318
1530	req->type = ix;	1319	req->type = ix;
…		…
1533		1322
1534	REQ_SEND;	1323	REQ_SEND;
1535	}	1324	}
1536		1325
1537	void	1326	void
1538	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1327	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1539	SV8 * oldpath
1540	SV8 * newpath
1541	SV * callback
1542	ALIAS:	1328	ALIAS:
1543	aio_link = REQ_LINK	1329	aio_link = EIO_LINK
1544	aio_symlink = REQ_SYMLINK	1330	aio_symlink = EIO_SYMLINK
1545	aio_rename = REQ_RENAME	1331	aio_rename = EIO_RENAME
1546	PPCODE:	1332	PPCODE:
1547	{	1333	{
1548	dREQ;	1334	dREQ;
1549		1335
1550	req->type = ix;	1336	req->type = ix;
1551	req->fh = newSVsv (oldpath);	1337	req->sv1 = newSVsv (oldpath);
1552	req->ptr2 = SvPVbyte_nolen (req->fh);
1553	req->sv1 = newSVsv (newpath);
1554	req->ptr1 = SvPVbyte_nolen (req->sv1);	1338	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1339	req->sv2 = newSVsv (newpath);
		1340	req->ptr2 = SvPVbyte_nolen (req->sv2);
1555		1341
1556	REQ_SEND;	1342	REQ_SEND;
1557	}	1343	}
1558		1344
1559	void	1345	void
1560	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1346	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1561	SV8 * pathname
1562	SV * callback
1563	UV mode
1564	UV dev
1565	PPCODE:	1347	PPCODE:
1566	{	1348	{
1567	dREQ;	1349	dREQ;
1568		1350
1569	req->type = REQ_MKNOD;	1351	req->type = EIO_MKNOD;
1570	req->sv1 = newSVsv (pathname);	1352	req->sv1 = newSVsv (pathname);
1571	req->ptr1 = SvPVbyte_nolen (req->sv1);	1353	req->ptr1 = SvPVbyte_nolen (req->sv1);
1572	req->mode = (mode_t)mode;	1354	req->int2 = (mode_t)mode;
1573	req->offs = dev;	1355	req->offs = dev;
1574		1356
1575	REQ_SEND;	1357	REQ_SEND;
1576	}	1358	}
1577		1359
1578	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
1579	aio_busy (delay,callback=&PL_sv_undef)	1435	aio_busy (double delay, SV *callback=&PL_sv_undef)
1580	double delay
1581	SV * callback
1582	PPCODE:	1436	PPCODE:
1583	{	1437	{
1584	dREQ;	1438	dREQ;
1585		1439
1586	req->type = REQ_BUSY;	1440	req->type = EIO_BUSY;
1587	req->int1 = delay < 0. ? 0 : delay;	1441	req->nv1 = delay < 0. ? 0. : delay;
1588	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1589		1442
1590	REQ_SEND;	1443	REQ_SEND;
1591	}	1444	}
1592		1445
1593	void	1446	void
1594	aio_group (callback=&PL_sv_undef)	1447	aio_group (SV *callback=&PL_sv_undef)
1595	SV * callback
1596	PROTOTYPE: ;$
1597	PPCODE:	1448	PPCODE:
1598	{	1449	{
1599	dREQ;	1450	dREQ;
1600		1451
1601	req->type = REQ_GROUP;	1452	req->type = EIO_GROUP;
1602		1453
1603	req_send (req);	1454	req_submit (req);
1604	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1455	XPUSHs (req_sv (req, aio_grp_stash));
1605	}	1456	}
1606		1457
1607	void	1458	void
1608	aio_nop (callback=&PL_sv_undef)	1459	aio_nop (SV *callback=&PL_sv_undef)
1609	SV * callback	1460	ALIAS:
		1461	aio_nop = EIO_NOP
		1462	aio_sync = EIO_SYNC
1610	PPCODE:	1463	PPCODE:
1611	{	1464	{
1612	dREQ;	1465	dREQ;
1613		1466
1614	req->type = REQ_NOP;	1467	req->type = ix;
1615		1468
1616	REQ_SEND;	1469	REQ_SEND;
1617	}	1470	}
1618		1471
1619	int	1472	int
1620	aioreq_pri (int pri = 0)	1473	aioreq_pri (int pri = 0)
1621	PROTOTYPE: ;$
1622	CODE:	1474	CODE:
1623	RETVAL = next_pri - PRI_BIAS;	1475	RETVAL = next_pri;
1624	if (items > 0)	1476	if (items > 0)
1625	{	1477	{
1626	if (pri < PRI_MIN) pri = PRI_MIN;	1478	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1627	if (pri > PRI_MAX) pri = PRI_MAX;	1479	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1628	next_pri = pri + PRI_BIAS;	1480	next_pri = pri;
1629	}	1481	}
1630	OUTPUT:	1482	OUTPUT:
1631	RETVAL	1483	RETVAL
1632		1484
1633	void	1485	void
1634	aioreq_nice (int nice = 0)	1486	aioreq_nice (int nice = 0)
1635	CODE:	1487	CODE:
1636	nice = next_pri - nice;	1488	nice = next_pri - nice;
1637	if (nice < PRI_MIN) nice = PRI_MIN;	1489	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1638	if (nice > PRI_MAX) nice = PRI_MAX;	1490	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1639	next_pri = nice + PRI_BIAS;	1491	next_pri = nice;
1640		1492
1641	void	1493	void
1642	flush ()	1494	flush ()
1643	PROTOTYPE:
1644	CODE:	1495	CODE:
1645	while (nreqs)	1496	while (eio_nreqs ())
1646	{	1497	{
1647	poll_wait ();	1498	poll_wait ();
1648	poll_cb ();	1499	poll_cb ();
1649	}	1500	}
1650		1501
1651	int	1502	int
1652	poll()	1503	poll ()
1653	PROTOTYPE:
1654	CODE:	1504	CODE:
1655	poll_wait ();	1505	poll_wait ();
1656	RETVAL = poll_cb ();	1506	RETVAL = poll_cb ();
1657	OUTPUT:	1507	OUTPUT:
1658	RETVAL	1508	RETVAL
1659		1509
1660	int	1510	int
1661	poll_fileno()	1511	poll_fileno ()
1662	PROTOTYPE:
1663	CODE:	1512	CODE:
1664	RETVAL = respipe [0];	1513	RETVAL = s_epipe_fd (&respipe);
1665	OUTPUT:	1514	OUTPUT:
1666	RETVAL	1515	RETVAL
1667		1516
1668	int	1517	int
1669	poll_cb(...)	1518	poll_cb (...)
1670	PROTOTYPE:	1519	PROTOTYPE:
1671	CODE:	1520	CODE:
1672	RETVAL = poll_cb ();	1521	RETVAL = poll_cb ();
1673	OUTPUT:	1522	OUTPUT:
1674	RETVAL	1523	RETVAL
1675		1524
1676	void	1525	void
1677	poll_wait()	1526	poll_wait ()
1678	PROTOTYPE:
1679	CODE:	1527	CODE:
1680	poll_wait ();	1528	poll_wait ();
1681		1529
1682	int	1530	int
1683	nreqs()	1531	nreqs ()
1684	PROTOTYPE:
1685	CODE:	1532	CODE:
1686	RETVAL = nreqs;	1533	RETVAL = eio_nreqs ();
1687	OUTPUT:	1534	OUTPUT:
1688	RETVAL	1535	RETVAL
1689		1536
1690	int	1537	int
1691	nready()	1538	nready ()
1692	PROTOTYPE:
1693	CODE:	1539	CODE:
1694	RETVAL = get_nready ();	1540	RETVAL = eio_nready ();
1695	OUTPUT:	1541	OUTPUT:
1696	RETVAL	1542	RETVAL
1697		1543
1698	int	1544	int
1699	npending()	1545	npending ()
1700	PROTOTYPE:
1701	CODE:	1546	CODE:
1702	RETVAL = get_npending ();	1547	RETVAL = eio_npending ();
1703	OUTPUT:	1548	OUTPUT:
1704	RETVAL	1549	RETVAL
1705		1550
1706	int	1551	int
1707	nthreads()	1552	nthreads ()
1708	PROTOTYPE:
1709	CODE:	1553	CODE:
1710	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1554	RETVAL = eio_nthreads ();
1711	RETVAL = started;
1712	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1713	OUTPUT:	1555	OUTPUT:
1714	RETVAL	1556	RETVAL
1715		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
1716	PROTOTYPES: DISABLE	1685	PROTOTYPES: DISABLE
1717		1686
1718	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1687	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1719		1688
1720	void	1689	void
1721	cancel (aio_req_ornot req)	1690	cancel (aio_req_ornot req)
1722	CODE:	1691	CODE:
1723	req_cancel (req);	1692	eio_cancel (req);
1724		1693
1725	void	1694	void
1726	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1695	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1727	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
1728	SvREFCNT_dec (req->callback);	1705	SvREFCNT_dec (req->callback);
1729	req->callback = newSVsv (callback);	1706	req->callback = SvREFCNT_inc (cb_cv);
		1707	}
		1708	}
1730		1709
1731	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1710	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1732		1711
1733	void	1712	void
1734	add (aio_req grp, ...)	1713	add (aio_req grp, ...)
1735	PPCODE:	1714	PPCODE:
1736	{	1715	{
1737	int i;	1716	int i;
1738	aio_req req;
1739		1717
1740	if (grp->int1 == 2)	1718	if (grp->int1 == 2)
1741	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");
1742		1720
1743	for (i = 1; i < items; ++i )	1721	for (i = 1; i < items; ++i )
1744	{	1722	{
		1723	aio_req req;
		1724
1745	if (GIMME_V != G_VOID)	1725	if (GIMME_V != G_VOID)
1746	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1726	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1747		1727
1748	req = SvAIO_REQ (ST (i));	1728	req = SvAIO_REQ (ST (i));
1749		1729
1750	if (req)	1730	if (req)
1751	{	1731	eio_grp_add (grp, req);
1752	++grp->size;
1753	req->grp = grp;
1754
1755	req->grp_prev = 0;
1756	req->grp_next = grp->grp_first;
1757
1758	if (grp->grp_first)
1759	grp->grp_first->grp_prev = req;
1760
1761	grp->grp_first = req;
1762	}
1763	}	1732	}
1764	}	1733	}
1765		1734
1766	void	1735	void
1767	cancel_subs (aio_req_ornot req)	1736	cancel_subs (aio_req_ornot req)
…		…
1776	AV *av;	1745	AV *av;
1777		1746
1778	grp->errorno = errno;	1747	grp->errorno = errno;
1779		1748
1780	av = newAV ();	1749	av = newAV ();
		1750	av_extend (av, items - 1);
1781		1751
1782	for (i = 1; i < items; ++i )	1752	for (i = 1; i < items; ++i )
1783	av_push (av, newSVsv (ST (i)));	1753	av_push (av, newSVsv (ST (i)));
1784		1754
1785	SvREFCNT_dec (grp->sv1);	1755	SvREFCNT_dec (grp->sv1);
…		…
1792	grp->errorno = errorno;	1762	grp->errorno = errorno;
1793		1763
1794	void	1764	void
1795	limit (aio_req grp, int limit)	1765	limit (aio_req grp, int limit)
1796	CODE:	1766	CODE:
1797	grp->int2 = limit;	1767	eio_grp_limit (grp, limit);
1798	aio_grp_feed (grp);
1799		1768
1800	void	1769	void
1801	feed (aio_req grp, SV *callback=&PL_sv_undef)	1770	feed (aio_req grp, SV *callback=&PL_sv_undef)
1802	CODE:	1771	CODE:
1803	{	1772	{
1804	SvREFCNT_dec (grp->sv2);	1773	SvREFCNT_dec (grp->sv2);
1805	grp->sv2 = newSVsv (callback);	1774	grp->sv2 = newSVsv (callback);
		1775	grp->feed = aio_grp_feed;
1806		1776
1807	if (grp->int2 <= 0)	1777	if (grp->int2 <= 0)
1808	grp->int2 = 2;	1778	grp->int2 = 2;
1809		1779
1810	aio_grp_feed (grp);	1780	eio_grp_limit (grp, grp->int2);
1811	}	1781	}
1812		1782

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