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Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 2008 UTC vs.
Revision 1.87 by root, Thu Jul 14 19:19:22 2011 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
1	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
		46
		47	#ifdef EIO_STACKSIZE
		48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		49	#endif
2	#include "xthread.h"	50	#include "xthread.h"
3		51
4	#include <errno.h>	52	#include <errno.h>
5	#include <stddef.h>	53	#include <stddef.h>
6	#include <stdlib.h>	54	#include <stdlib.h>
…		…
10	#include <sys/stat.h>	58	#include <sys/stat.h>
11	#include <limits.h>	59	#include <limits.h>
12	#include <fcntl.h>	60	#include <fcntl.h>
13	#include <assert.h>	61	#include <assert.h>
14		62
		63	#include <sys/statvfs.h>
		64	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		65	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		66	#if HAVE_STDINT_H
		67	# include <stdint.h>
		68	#endif
		69
		70	#ifndef ECANCELED
		71	# define ECANCELED EDOM
		72	#endif
		73
		74	static void eio_destroy (eio_req *req);
		75
15	#ifndef EIO_FINISH	76	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	77	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	78	#endif
18		79
19	#ifndef EIO_DESTROY	80	#ifndef EIO_DESTROY
…		…
22		83
23	#ifndef EIO_FEED	84	#ifndef EIO_FEED
24	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	85	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
25	#endif	86	#endif
26		87
		88	#ifndef EIO_FD_TO_WIN32_HANDLE
		89	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		90	#endif
		91	#ifndef EIO_WIN32_HANDLE_TO_FD
		92	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		93	#endif
		94
		95	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		96
		97	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		98
27	#ifdef _WIN32	99	#ifdef _WIN32
28		100
29	/*doh*/	101	#define PAGESIZE 4096 /* GetSystemInfo? */
		102
		103	#ifdef EIO_STRUCT_STATI64
		104	#define stat(path,buf) _stati64 (path,buf)
		105	#define fstat(fd,buf) _fstati64 (path,buf)
		106	#endif
		107	#define lstat(path,buf) stat (path,buf)
		108	#define fsync(fd) (FlushFileBuffers (EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		109	#define mkdir(path,mode) _mkdir (path)
		110	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		111
		112	#define chown(path,uid,gid) EIO_ENOSYS ()
		113	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		114	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		115	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		116	#define mknod(path,mode,dev) EIO_ENOSYS ()
		117	#define sync() EIO_ENOSYS ()
		118
		119	/* we could even stat and see if it exists */
		120	static int
		121	symlink (const char *old, const char *neu)
		122	{
		123	if (CreateSymbolicLink (neu, old, 1))
		124	return 0;
		125
		126	if (CreateSymbolicLink (neu, old, 0))
		127	return 0;
		128
		129	return EIO_ERRNO (ENOENT, -1);
		130	}
30		131
31	#else	132	#else
32		133
33	# include "config.h"
34	# include <sys/time.h>	134	#include <sys/time.h>
35	# include <sys/select.h>	135	#include <sys/select.h>
		136	#include <sys/statvfs.h>
36	# include <unistd.h>	137	#include <unistd.h>
37	# include <utime.h>	138	#include <utime.h>
38	# include <signal.h>	139	#include <signal.h>
39	# include <dirent.h>	140	#include <dirent.h>
40		141
		142	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		143	#include <sys/mman.h>
		144	#endif
		145
		146	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		147	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		148	#define _DIRENT_HAVE_D_TYPE /* sigh */
		149	#define D_INO(de) (de)->d_fileno
		150	#define D_NAMLEN(de) (de)->d_namlen
		151	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		152	#define D_INO(de) (de)->d_ino
		153	#endif
		154
		155	#ifdef _D_EXACT_NAMLEN
		156	#undef D_NAMLEN
		157	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		158	#endif
		159
		160	#ifdef _DIRENT_HAVE_D_TYPE
		161	#define D_TYPE(de) (de)->d_type
		162	#endif
		163
41	# ifndef EIO_STRUCT_DIRENT	164	#ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	165	#define EIO_STRUCT_DIRENT struct dirent
		166	#endif
		167
43	# endif	168	#endif
44
45	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		169
51	#if HAVE_SENDFILE	170	#if HAVE_SENDFILE
52	# if __linux	171	# if __linux
53	# include <sys/sendfile.h>	172	# include <sys/sendfile.h>
54	# elif __freebsd	173	# elif __FreeBSD__ || defined __APPLE__
55	# include <sys/socket.h>	174	# include <sys/socket.h>
56	# include <sys/uio.h>	175	# include <sys/uio.h>
57	# elif __hpux	176	# elif __hpux
58	# include <sys/socket.h>	177	# include <sys/socket.h>
59	# elif __solaris /* not yet */	178	# elif __solaris
60	# include <sys/sendfile.h>	179	# include <sys/sendfile.h>
61	# else	180	# else
62	# error sendfile support requested but not available	181	# error sendfile support requested but not available
63	# endif	182	# endif
64	#endif	183	#endif
65		184
66	/* number of seconds after which an idle threads exit */	185	#ifndef D_TYPE
67	#define IDLE_TIMEOUT 10	186	# define D_TYPE(de) 0
		187	#endif
		188	#ifndef D_INO
		189	# define D_INO(de) 0
		190	#endif
		191	#ifndef D_NAMLEN
		192	# define D_NAMLEN(de) strlen ((de)->d_name)
		193	#endif
68		194
69	/* used for struct dirent, AIX doesn't provide it */	195	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	196	#ifndef NAME_MAX
71	# define NAME_MAX 4096	197	# define NAME_MAX 4096
72	#endif	198	#endif
73		199
		200	/* used for readlink etc. */
		201	#ifndef PATH_MAX
		202	# define PATH_MAX 4096
		203	#endif
		204
74	/* buffer size for various temporary buffers */	205	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	206	#define EIO_BUFSIZE 65536
76		207
77	#define dBUF \	208	#define dBUF \
78	char *eio_buf; \	209	char *eio_buf; \
79	X_LOCK (wrklock); \	210	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	211	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	212	ETP_WORKER_UNLOCK (self); \
		213	errno = ENOMEM; \
82	if (!eio_buf) \	214	if (!eio_buf) \
83	return -1;	215	return -1;
84		216
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	217	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		218
		219	#define ETP_PRI_MIN EIO_PRI_MIN
		220	#define ETP_PRI_MAX EIO_PRI_MAX
		221
		222	struct etp_worker;
		223
		224	#define ETP_REQ eio_req
		225	#define ETP_DESTROY(req) eio_destroy (req)
		226	static int eio_finish (eio_req *req);
		227	#define ETP_FINISH(req) eio_finish (req)
		228	static void eio_execute (struct etp_worker *self, eio_req *req);
		229	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		230
		231	#define ETP_WORKER_CLEAR(req) \
		232	if (wrk->dbuf) \
		233	{ \
		234	free (wrk->dbuf); \
		235	wrk->dbuf = 0; \
		236	} \
		237	\
		238	if (wrk->dirp) \
		239	{ \
		240	closedir (wrk->dirp); \
		241	wrk->dirp = 0; \
		242	}
		243
		244	#define ETP_WORKER_COMMON \
		245	void *dbuf; \
		246	DIR *dirp;
		247
		248	/*****************************************************************************/
		249
		250	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		251
		252	/* calculate time difference in ~1/EIO_TICKS of a second */
		253	ecb_inline int
		254	tvdiff (struct timeval *tv1, struct timeval *tv2)
		255	{
		256	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		257	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		258	}
		259
		260	static unsigned int started, idle, wanted = 4;
		261
87	static void (*want_poll_cb) (void);	262	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	263	static void (*done_poll_cb) (void);
89		264
90	static unsigned int max_poll_time = 0;	265	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	266	static unsigned int max_poll_reqs; /* reslock */
92		267
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	268	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	269	static volatile unsigned int nready; /* reqlock */
95	{	270	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	271	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	272	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
98	}
99		273
100	static unsigned int started, idle, wanted;	274	static xmutex_t wrklock;
		275	static xmutex_t reslock;
		276	static xmutex_t reqlock;
		277	static xcond_t reqwait;
		278
		279	#if !HAVE_PREADWRITE
		280	/*
		281	* make our pread/pwrite emulation safe against themselves, but not against
		282	* normal read/write by using a mutex. slows down execution a lot,
		283	* but that's your problem, not mine.
		284	*/
		285	static xmutex_t preadwritelock = X_MUTEX_INIT;
		286	#endif
		287
		288	typedef struct etp_worker
		289	{
		290	/* locked by wrklock */
		291	struct etp_worker *prev, *next;
		292
		293	xthread_t tid;
		294
		295	/* locked by reslock, reqlock or wrklock */
		296	ETP_REQ *req; /* currently processed request */
		297
		298	ETP_WORKER_COMMON
		299	} etp_worker;
		300
		301	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		302
		303	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		304	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
101		305
102	/* worker threads management */	306	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;
104		307
105	typedef struct worker {	308	static void ecb_cold
106	/* locked by wrklock */
107	struct worker *prev, *next;
108
109	thread_t tid;
110
111	/* locked by reslock, reqlock or wrklock */
112	eio_req *req; /* currently processed request */
113	void *dbuf;
114	DIR *dirp;
115	} worker;
116
117	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119	static void worker_clear (worker *wrk)	309	etp_worker_clear (etp_worker *wrk)
120	{	310	{
121	if (wrk->dirp)	311	ETP_WORKER_CLEAR (wrk);
122	{
123	closedir (wrk->dirp);
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}	312	}
133		313
134	static void worker_free (worker *wrk)	314	static void ecb_cold
		315	etp_worker_free (etp_worker *wrk)
135	{	316	{
136	wrk->next->prev = wrk->prev;	317	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;	318	wrk->prev->next = wrk->next;
138		319
139	free (wrk);	320	free (wrk);
140	}	321	}
141		322
142	static volatile unsigned int nreqs, nready, npending;	323	static unsigned int
143	static volatile unsigned int max_idle = 4;	324	etp_nreqs (void)
144
145	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;
148
149	unsigned int eio_nreqs (void)
150	{	325	{
		326	int retval;
		327	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		328	retval = nreqs;
		329	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	330	return retval;
152	}	331	}
153		332
154	unsigned int eio_nready (void)	333	static unsigned int
		334	etp_nready (void)
155	{	335	{
156	unsigned int retval;	336	unsigned int retval;
157		337
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	338	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	339	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	340	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		341
162	return retval;	342	return retval;
163	}	343	}
164		344
165	unsigned int eio_npending (void)	345	static unsigned int
		346	etp_npending (void)
166	{	347	{
167	unsigned int retval;	348	unsigned int retval;
168		349
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	350	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	351	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	352	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		353
173	return retval;	354	return retval;
174	}	355	}
175		356
176	unsigned int eio_nthreads (void)	357	static unsigned int
		358	etp_nthreads (void)
177	{	359	{
178	unsigned int retval;	360	unsigned int retval;
179		361
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	362	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	363	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	370	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	371	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	372	* per shift, the most expensive operation.
191	*/	373	*/
192	typedef struct {	374	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	375	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	376	int size;
195	} reqq;	377	} etp_reqq;
196		378
197	static reqq req_queue;	379	static etp_reqq req_queue;
198	static reqq res_queue;	380	static etp_reqq res_queue;
199		381
200	static int reqq_push (reqq *q, eio_req *req)	382	static int ecb_noinline
		383	reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	384	{
202	int pri = req->pri;	385	int pri = req->pri;
203	req->next = 0;	386	req->next = 0;
204		387
205	if (q->qe[pri])	388	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	394	q->qe[pri] = q->qs[pri] = req;
212		395
213	return q->size++;	396	return q->size++;
214	}	397	}
215		398
216	static eio_req *reqq_shift (reqq *q)	399	static ETP_REQ * ecb_noinline
		400	reqq_shift (etp_reqq *q)
217	{	401	{
218	int pri;	402	int pri;
219		403
220	if (!q->size)	404	if (!q->size)
221	return 0;	405	return 0;
222		406
223	--q->size;	407	--q->size;
224		408
225	for (pri = EIO_NUM_PRI; pri--; )	409	for (pri = ETP_NUM_PRI; pri--; )
226	{	410	{
227	eio_req *req = q->qs[pri];	411	eio_req *req = q->qs[pri];
228		412
229	if (req)	413	if (req)
230	{	414	{
…		…
236	}	420	}
237		421
238	abort ();	422	abort ();
239	}	423	}
240		424
241	static void grp_try_feed (eio_req *grp)	425	static void ecb_cold
		426	etp_thread_init (void)
242	{	427	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	428	#if !HAVE_PREADWRITE
		429	X_MUTEX_CREATE (preadwritelock);
		430	#endif
		431	X_MUTEX_CREATE (wrklock);
		432	X_MUTEX_CREATE (reslock);
		433	X_MUTEX_CREATE (reqlock);
		434	X_COND_CREATE (reqwait);
		435	}
		436
		437	static void ecb_cold
		438	etp_atfork_prepare (void)
		439	{
		440	}
		441
		442	static void ecb_cold
		443	etp_atfork_parent (void)
		444	{
		445	}
		446
		447	static void ecb_cold
		448	etp_atfork_child (void)
		449	{
		450	ETP_REQ *prv;
		451
		452	while ((prv = reqq_shift (&req_queue)))
		453	ETP_DESTROY (prv);
		454
		455	while ((prv = reqq_shift (&res_queue)))
		456	ETP_DESTROY (prv);
		457
		458	while (wrk_first.next != &wrk_first)
244	{	459	{
245	int old_len = grp->size;	460	etp_worker *wrk = wrk_first.next;
246		461
247	EIO_FEED (grp);	462	if (wrk->req)
		463	ETP_DESTROY (wrk->req);
248		464
249	/* stop if no progress has been made */	465	etp_worker_clear (wrk);
250	if (old_len == grp->size)	466	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	467	}
256	}
257		468
258	static int eio_finish (eio_req *req);	469	started = 0;
		470	idle = 0;
		471	nreqs = 0;
		472	nready = 0;
		473	npending = 0;
259		474
260	static int grp_dec (eio_req *grp)	475	etp_thread_init ();
261	{	476	}
262	--grp->size;
263		477
264	/* call feeder, if applicable */	478	static void ecb_cold
265	grp_try_feed (grp);	479	etp_once_init (void)
		480	{
		481	etp_thread_init ();
		482	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		483	}
266		484
267	/* finish, if done */	485	static int ecb_cold
268	if (!grp->size && grp->int1)	486	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	487	{
270	else	488	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		489
		490	pthread_once (&doinit, etp_once_init);
		491
		492	want_poll_cb = want_poll;
		493	done_poll_cb = done_poll;
		494
271	return 0;	495	return 0;
272	}	496	}
273		497
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);	498	X_THREAD_PROC (etp_proc);
325		499
326	static void start_thread (void)	500	static void ecb_cold
		501	etp_start_thread (void)
327	{	502	{
328	worker *wrk = calloc (1, sizeof (worker));	503	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		504
330	/*TODO*/	505	/*TODO*/
331	assert (("unable to allocate worker thread data", !wrk));	506	assert (("unable to allocate worker thread data", wrk));
332		507
333	X_LOCK (wrklock);	508	X_LOCK (wrklock);
334		509
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	510	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	511	{
337	wrk->prev = &wrk_first;	512	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	513	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	514	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	515	wrk_first.next = wrk;
…		…
344	free (wrk);	519	free (wrk);
345		520
346	X_UNLOCK (wrklock);	521	X_UNLOCK (wrklock);
347	}	522	}
348		523
		524	static void
349	static void maybe_start_thread (void)	525	etp_maybe_start_thread (void)
350	{	526	{
351	if (eio_nthreads () >= wanted)	527	if (ecb_expect_true (etp_nthreads () >= wanted))
352	return;	528	return;
353		529
354	/* todo: maybe use idle here, but might be less exact */	530	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	531	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	532	return;
357		533
358	start_thread ();	534	etp_start_thread ();
359	}	535	}
360		536
361	void eio_submit (eio_req *req)	537	static void ecb_cold
362	{	538	etp_end_thread (void)
363	++nreqs;
364
365	X_LOCK (reqlock);
366	++nready;
367	reqq_push (&req_queue, req);
368	X_COND_SIGNAL (reqwait);
369	X_UNLOCK (reqlock);
370
371	maybe_start_thread ();
372	}
373
374	static void end_thread (void)
375	{	539	{
376	eio_req *req = calloc (1, sizeof (eio_req));	540	eio_req *req = calloc (1, sizeof (eio_req));
377		541
378	req->type = EIO_QUIT;	542	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	543	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		544
381	X_LOCK (reqlock);	545	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	546	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	547	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	548	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	550	X_LOCK (wrklock);
387	--started;	551	--started;
388	X_UNLOCK (wrklock);	552	X_UNLOCK (wrklock);
389	}	553	}
390		554
391	void eio_set_max_poll_time (double nseconds)	555	static int
392	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}
397
398	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}
404
405	void eio_set_max_idle (unsigned int nthreads)
406	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}
411
412	void eio_set_min_parallel (unsigned int nthreads)
413	{
414	if (wanted < nthreads)
415	wanted = nthreads;
416	}
417
418	void eio_set_max_parallel (unsigned int nthreads)
419	{
420	if (wanted > nthreads)
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}
426
427	int eio_poll (void)	556	etp_poll (void)
428	{	557	{
429	int maxreqs = max_poll_reqs;	558	unsigned int maxreqs;
		559	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	560	struct timeval tv_start, tv_now;
431	eio_req *req;
432		561
		562	X_LOCK (reslock);
		563	maxreqs = max_poll_reqs;
		564	maxtime = max_poll_time;
		565	X_UNLOCK (reslock);
		566
433	if (max_poll_time)	567	if (maxtime)
434	gettimeofday (&tv_start, 0);	568	gettimeofday (&tv_start, 0);
435		569
436	for (;;)	570	for (;;)
437	{	571	{
		572	ETP_REQ *req;
		573
438	maybe_start_thread ();	574	etp_maybe_start_thread ();
439		575
440	X_LOCK (reslock);	576	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	577	req = reqq_shift (&res_queue);
442		578
443	if (req)	579	if (req)
…		…
451	X_UNLOCK (reslock);	587	X_UNLOCK (reslock);
452		588
453	if (!req)	589	if (!req)
454	return 0;	590	return 0;
455		591
		592	X_LOCK (reqlock);
456	--nreqs;	593	--nreqs;
		594	X_UNLOCK (reqlock);
457		595
458	if (req->type == EIO_GROUP && req->size)	596	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
459	{	597	{
460	req->int1 = 1; /* mark request as delayed */	598	req->int1 = 1; /* mark request as delayed */
461	continue;	599	continue;
462	}	600	}
463	else	601	else
464	{	602	{
465	int res = eio_finish (req);	603	int res = ETP_FINISH (req);
466	if (res)	604	if (ecb_expect_false (res))
467	return res;	605	return res;
468	}	606	}
469		607
470	if (maxreqs && !--maxreqs)	608	if (ecb_expect_false (maxreqs && !--maxreqs))
471	break;	609	break;
472		610
473	if (max_poll_time)	611	if (maxtime)
474	{	612	{
475	gettimeofday (&tv_now, 0);	613	gettimeofday (&tv_now, 0);
476		614
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	615	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	616	break;
479	}	617	}
480	}	618	}
481		619
482	errno = EAGAIN;	620	errno = EAGAIN;
483	return -1;	621	return -1;
484	}	622	}
485		623
		624	static void
		625	etp_cancel (ETP_REQ *req)
		626	{
		627	req->cancelled = 1;
		628
		629	eio_grp_cancel (req);
		630	}
		631
		632	static void
		633	etp_submit (ETP_REQ *req)
		634	{
		635	req->pri -= ETP_PRI_MIN;
		636
		637	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		638	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		639
		640	if (ecb_expect_false (req->type == EIO_GROUP))
		641	{
		642	/* I hope this is worth it :/ */
		643	X_LOCK (reqlock);
		644	++nreqs;
		645	X_UNLOCK (reqlock);
		646
		647	X_LOCK (reslock);
		648
		649	++npending;
		650
		651	if (!reqq_push (&res_queue, req) && want_poll_cb)
		652	want_poll_cb ();
		653
		654	X_UNLOCK (reslock);
		655	}
		656	else
		657	{
		658	X_LOCK (reqlock);
		659	++nreqs;
		660	++nready;
		661	reqq_push (&req_queue, req);
		662	X_COND_SIGNAL (reqwait);
		663	X_UNLOCK (reqlock);
		664
		665	etp_maybe_start_thread ();
		666	}
		667	}
		668
		669	static void ecb_cold
		670	etp_set_max_poll_time (double nseconds)
		671	{
		672	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		673	max_poll_time = nseconds * EIO_TICKS;
		674	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		675	}
		676
		677	static void ecb_cold
		678	etp_set_max_poll_reqs (unsigned int maxreqs)
		679	{
		680	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		681	max_poll_reqs = maxreqs;
		682	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		683	}
		684
		685	static void ecb_cold
		686	etp_set_max_idle (unsigned int nthreads)
		687	{
		688	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		689	max_idle = nthreads;
		690	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		691	}
		692
		693	static void ecb_cold
		694	etp_set_idle_timeout (unsigned int seconds)
		695	{
		696	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		697	idle_timeout = seconds;
		698	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		699	}
		700
		701	static void ecb_cold
		702	etp_set_min_parallel (unsigned int nthreads)
		703	{
		704	if (wanted < nthreads)
		705	wanted = nthreads;
		706	}
		707
		708	static void ecb_cold
		709	etp_set_max_parallel (unsigned int nthreads)
		710	{
		711	if (wanted > nthreads)
		712	wanted = nthreads;
		713
		714	while (started > wanted)
		715	etp_end_thread ();
		716	}
		717
		718	/*****************************************************************************/
		719
		720	static void
		721	grp_try_feed (eio_req *grp)
		722	{
		723	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		724	{
		725	grp->flags &= ~EIO_FLAG_GROUPADD;
		726
		727	EIO_FEED (grp);
		728
		729	/* stop if no progress has been made */
		730	if (!(grp->flags & EIO_FLAG_GROUPADD))
		731	{
		732	grp->feed = 0;
		733	break;
		734	}
		735	}
		736	}
		737
		738	static int
		739	grp_dec (eio_req *grp)
		740	{
		741	--grp->size;
		742
		743	/* call feeder, if applicable */
		744	grp_try_feed (grp);
		745
		746	/* finish, if done */
		747	if (!grp->size && grp->int1)
		748	return eio_finish (grp);
		749	else
		750	return 0;
		751	}
		752
		753	static void
		754	eio_destroy (eio_req *req)
		755	{
		756	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		757	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		758
		759	EIO_DESTROY (req);
		760	}
		761
		762	static int
		763	eio_finish (eio_req *req)
		764	{
		765	int res = EIO_FINISH (req);
		766
		767	if (req->grp)
		768	{
		769	int res2;
		770	eio_req *grp = req->grp;
		771
		772	/* unlink request */
		773	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		774	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		775
		776	if (grp->grp_first == req)
		777	grp->grp_first = req->grp_next;
		778
		779	res2 = grp_dec (grp);
		780
		781	if (!res)
		782	res = res2;
		783	}
		784
		785	eio_destroy (req);
		786
		787	return res;
		788	}
		789
		790	void
		791	eio_grp_cancel (eio_req *grp)
		792	{
		793	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		794	eio_cancel (grp);
		795	}
		796
		797	void
		798	eio_cancel (eio_req *req)
		799	{
		800	etp_cancel (req);
		801	}
		802
		803	void
		804	eio_submit (eio_req *req)
		805	{
		806	etp_submit (req);
		807	}
		808
		809	unsigned int
		810	eio_nreqs (void)
		811	{
		812	return etp_nreqs ();
		813	}
		814
		815	unsigned int
		816	eio_nready (void)
		817	{
		818	return etp_nready ();
		819	}
		820
		821	unsigned int
		822	eio_npending (void)
		823	{
		824	return etp_npending ();
		825	}
		826
		827	unsigned int ecb_cold
		828	eio_nthreads (void)
		829	{
		830	return etp_nthreads ();
		831	}
		832
		833	void ecb_cold
		834	eio_set_max_poll_time (double nseconds)
		835	{
		836	etp_set_max_poll_time (nseconds);
		837	}
		838
		839	void ecb_cold
		840	eio_set_max_poll_reqs (unsigned int maxreqs)
		841	{
		842	etp_set_max_poll_reqs (maxreqs);
		843	}
		844
		845	void ecb_cold
		846	eio_set_max_idle (unsigned int nthreads)
		847	{
		848	etp_set_max_idle (nthreads);
		849	}
		850
		851	void ecb_cold
		852	eio_set_idle_timeout (unsigned int seconds)
		853	{
		854	etp_set_idle_timeout (seconds);
		855	}
		856
		857	void ecb_cold
		858	eio_set_min_parallel (unsigned int nthreads)
		859	{
		860	etp_set_min_parallel (nthreads);
		861	}
		862
		863	void ecb_cold
		864	eio_set_max_parallel (unsigned int nthreads)
		865	{
		866	etp_set_max_parallel (nthreads);
		867	}
		868
		869	int eio_poll (void)
		870	{
		871	return etp_poll ();
		872	}
		873
486	/*****************************************************************************/	874	/*****************************************************************************/
487	/* work around various missing functions */	875	/* work around various missing functions */
488		876
489	#if !HAVE_PREADWRITE	877	#if !HAVE_PREADWRITE
		878	# undef pread
		879	# undef pwrite
490	# define pread aio_pread	880	# define pread eio__pread
491	# define pwrite aio_pwrite	881	# define pwrite eio__pwrite
492		882
493	/*	883	static ssize_t
494	* make our pread/pwrite safe against themselves, but not against	884	eio__pread (int fd, void *buf, size_t count, off_t offset)
495	* normal read/write by using a mutex. slows down execution a lot,
496	* but that's your problem, not mine.
497	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;
499
500	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501	{	885	{
502	ssize_t res;	886	ssize_t res;
503	off_t ooffset;	887	off_t ooffset;
504		888
505	X_LOCK (preadwritelock);	889	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	894	X_UNLOCK (preadwritelock);
511		895
512	return res;	896	return res;
513	}	897	}
514		898
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	899	static ssize_t
		900	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	901	{
517	ssize_t res;	902	ssize_t res;
518	off_t ooffset;	903	off_t ooffset;
519		904
520	X_LOCK (preadwritelock);	905	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	906	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	907	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	908	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	909	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	910	X_UNLOCK (preadwritelock);
526		911
527	return res;	912	return res;
528	}	913	}
529	#endif	914	#endif
530		915
531	#ifndef HAVE_FUTIMES	916	#ifndef HAVE_UTIMES
532		917
		918	# undef utimes
533	# define utimes(path,times) aio_utimes (path, times)	919	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)
535		920
		921	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	922	eio__utimes (const char *filename, const struct timeval times[2])
537	{	923	{
538	if (times)	924	if (times)
539	{	925	{
540	struct utimbuf buf;	926	struct utimbuf buf;
541		927
…		…
546	}	932	}
547	else	933	else
548	return utime (filename, 0);	934	return utime (filename, 0);
549	}	935	}
550		936
		937	#endif
		938
		939	#ifndef HAVE_FUTIMES
		940
		941	# undef futimes
		942	# define futimes(fd,times) eio__futimes (fd, times)
		943
		944	static int
551	static int aio_futimes (int fd, const struct timeval tv[2])	945	eio__futimes (int fd, const struct timeval tv[2])
552	{	946	{
553	errno = ENOSYS;	947	errno = ENOSYS;
554	return -1;	948	return -1;
555	}	949	}
556		950
557	#endif	951	#endif
558		952
559	#if !HAVE_FDATASYNC	953	#if !HAVE_FDATASYNC
		954	# undef fdatasync
560	# define fdatasync fsync	955	# define fdatasync(fd) fsync (fd)
561	#endif	956	#endif
		957
		958	/* sync_file_range always needs emulation */
		959	static int
		960	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		961	{
		962	#if HAVE_SYNC_FILE_RANGE
		963	int res;
		964
		965	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		966	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		967	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		968	{
		969	flags = 0
		970	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		971	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		972	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		973	}
		974
		975	res = sync_file_range (fd, offset, nbytes, flags);
		976
		977	if (!res || errno != ENOSYS)
		978	return res;
		979	#endif
		980
		981	/* even though we could play tricks with the flags, it's better to always
		982	* call fdatasync, as that matches the expectation of its users best */
		983	return fdatasync (fd);
		984	}
		985
		986	static int
		987	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		988	{
		989	#if HAVE_FALLOCATE
		990	return fallocate (fd, mode, offset, len);
		991	#else
		992	errno = ENOSYS;
		993	return -1;
		994	#endif
		995	}
562		996
563	#if !HAVE_READAHEAD	997	#if !HAVE_READAHEAD
		998	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	999	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		1000
		1001	static ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1002	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	1003	{
568	size_t todo = count;	1004	size_t todo = count;
569	dBUF;	1005	dBUF;
570		1006
571	while (todo > 0)	1007	while (todo > 0)
…		…
581	return count;	1017	return count;
582	}	1018	}
583		1019
584	#endif	1020	#endif
585		1021
586	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r
588
589	static mutex_t readdirlock = X_MUTEX_INIT;
590
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{
593	EIO_STRUCT_DIRENT *e;
594	int errorno;
595
596	X_LOCK (readdirlock);
597
598	e = readdir (dirp);
599	errorno = errno;
600
601	if (e)
602	{
603	*res = ent;
604	strcpy (ent->d_name, e->d_name);
605	}
606	else
607	*res = 0;
608
609	X_UNLOCK (readdirlock);
610
611	errno = errorno;
612	return e ? 0 : -1;
613	}
614	#endif
615
616	/* sendfile always needs emulation */	1022	/* sendfile always needs emulation */
		1023	static ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1024	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
618	{	1025	{
		1026	ssize_t written = 0;
619	ssize_t res;	1027	ssize_t res;
620		1028
621	if (!count)	1029	if (!count)
622	return 0;	1030	return 0;
623		1031
		1032	for (;;)
		1033	{
		1034	#ifdef __APPLE__
		1035	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1036	#endif
624	#if HAVE_SENDFILE	1037	#if HAVE_SENDFILE
625	# if __linux	1038	# if __linux
		1039	off_t soffset = offset;
626	res = sendfile (ofd, ifd, &offset, count);	1040	res = sendfile (ofd, ifd, &soffset, count);
627		1041
628	# elif __freebsd	1042	# elif __FreeBSD__
629	/*	1043	/*
630	* Of course, the freebsd sendfile is a dire hack with no thoughts	1044	* Of course, the freebsd sendfile is a dire hack with no thoughts
631	* wasted on making it similar to other I/O functions.	1045	* wasted on making it similar to other I/O functions.
632	*/	1046	*/
633	{
634	off_t sbytes;	1047	off_t sbytes;
635	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1048	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
636		1049
637	if (res < 0 && sbytes)	1050	#if 0 /* according to the manpage, this is correct, but broken behaviour */
638	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1051	/* freebsd' sendfile will return 0 on success */
		1052	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1053	/* not on e.g. EIO or EPIPE - sounds broken */
		1054	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
639	res = sbytes;	1055	res = sbytes;
640	}	1056	#endif
		1057
		1058	/* according to source inspection, this is correct, and useful behaviour */
		1059	if (sbytes)
		1060	res = sbytes;
		1061
		1062	# elif defined (__APPLE__)
		1063	off_t sbytes = count;
		1064	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1065
		1066	/* according to the manpage, sbytes is always valid */
		1067	if (sbytes)
		1068	res = sbytes;
641		1069
642	# elif __hpux	1070	# elif __hpux
643	res = sendfile (ofd, ifd, offset, count, 0, 0);	1071	res = sendfile (ofd, ifd, offset, count, 0, 0);
644		1072
645	# elif __solaris	1073	# elif __solaris
646	{
647	struct sendfilevec vec;	1074	struct sendfilevec vec;
648	size_t sbytes;	1075	size_t sbytes;
649		1076
650	vec.sfv_fd = ifd;	1077	vec.sfv_fd = ifd;
651	vec.sfv_flag = 0;	1078	vec.sfv_flag = 0;
652	vec.sfv_off = offset;	1079	vec.sfv_off = offset;
653	vec.sfv_len = count;	1080	vec.sfv_len = count;
654		1081
655	res = sendfilev (ofd, &vec, 1, &sbytes);	1082	res = sendfilev (ofd, &vec, 1, &sbytes);
656		1083
657	if (res < 0 && sbytes)	1084	if (res < 0 && sbytes)
658	res = sbytes;	1085	res = sbytes;
659	}
660		1086
661	# endif	1087	# endif
		1088
		1089	#elif defined (_WIN32) && 0
		1090	/* does not work, just for documentation of what would need to be done */
		1091	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1092	/* libeio guarantees that the file offset does not change, and windows */
		1093	/* has no way to get an independent handle to the same file description */
		1094	HANDLE h = TO_SOCKET (ifd);
		1095	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1096	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1097
662	#else	1098	#else
663	res = -1;	1099	res = -1;
664	errno = ENOSYS;	1100	errno = ENOSYS;
665	#endif	1101	#endif
666		1102
		1103	/* we assume sendfile can copy at least 128mb in one go */
		1104	if (res <= 128 * 1024 * 1024)
		1105	{
		1106	if (res > 0)
		1107	written += res;
		1108
		1109	if (written)
		1110	return written;
		1111
		1112	break;
		1113	}
		1114	else
		1115	{
		1116	/* if we requested more, then probably the kernel was lazy */
		1117	written += res;
		1118	offset += res;
		1119	count -= res;
		1120
		1121	if (!count)
		1122	return written;
		1123	}
		1124	}
		1125
667	if (res < 0	1126	if (res < 0
668	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1127	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1128	/* BSDs */
		1129	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1130	|| errno == ENOTSUP
		1131	#endif
		1132	|| errno == EOPNOTSUPP /* BSDs */
669	#if __solaris	1133	#if __solaris
670	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1134	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
671	#endif	1135	#endif
672	)	1136	)
673	)	1137	)
…		…
704	}	1168	}
705		1169
706	return res;	1170	return res;
707	}	1171	}
708		1172
		1173	#ifdef PAGESIZE
		1174	# define eio_pagesize() PAGESIZE
		1175	#else
		1176	static intptr_t
		1177	eio_pagesize (void)
		1178	{
		1179	static intptr_t page;
		1180
		1181	if (!page)
		1182	page = sysconf (_SC_PAGESIZE);
		1183
		1184	return page;
		1185	}
		1186	#endif
		1187
		1188	static void
		1189	eio_page_align (void **addr, size_t *length)
		1190	{
		1191	intptr_t mask = eio_pagesize () - 1;
		1192
		1193	/* round down addr */
		1194	intptr_t adj = mask & (intptr_t)*addr;
		1195
		1196	*addr = (void *)((intptr_t)*addr - adj);
		1197	*length += adj;
		1198
		1199	/* round up length */
		1200	*length = (*length + mask) & ~mask;
		1201	}
		1202
		1203	#if !_POSIX_MEMLOCK
		1204	# define eio__mlockall(a) eio_nosyscall()
		1205	#else
		1206
		1207	static int
		1208	eio__mlockall (int flags)
		1209	{
		1210	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1211	extern int mallopt (int, int);
		1212	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1213	#endif
		1214
		1215	if (EIO_MCL_CURRENT != MCL_CURRENT
		1216	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1217	{
		1218	flags = 0
		1219	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1220	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1221	}
		1222
		1223	return mlockall (flags);
		1224	}
		1225	#endif
		1226
		1227	#if !_POSIX_MEMLOCK_RANGE
		1228	# define eio__mlock(a,b) EIO_ENOSYS ()
		1229	#else
		1230
		1231	static int
		1232	eio__mlock (void *addr, size_t length)
		1233	{
		1234	eio_page_align (&addr, &length);
		1235
		1236	return mlock (addr, length);
		1237	}
		1238
		1239	#endif
		1240
		1241	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1242	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1243	#else
		1244
		1245	static int
		1246	eio__msync (void *mem, size_t len, int flags)
		1247	{
		1248	eio_page_align (&mem, &len);
		1249
		1250	if (EIO_MS_ASYNC != MS_SYNC
		1251	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1252	|| EIO_MS_SYNC != MS_SYNC)
		1253	{
		1254	flags = 0
		1255	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1256	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1257	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1258	}
		1259
		1260	return msync (mem, len, flags);
		1261	}
		1262
		1263	#endif
		1264
		1265	static int
		1266	eio__mtouch (eio_req *req)
		1267	{
		1268	void *mem = req->ptr2;
		1269	size_t len = req->size;
		1270	int flags = req->int1;
		1271
		1272	eio_page_align (&mem, &len);
		1273
		1274	{
		1275	intptr_t addr = (intptr_t)mem;
		1276	intptr_t end = addr + len;
		1277	intptr_t page = eio_pagesize ();
		1278
		1279	if (addr < end)
		1280	if (flags & EIO_MT_MODIFY) /* modify */
		1281	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1282	else
		1283	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1284	}
		1285
		1286	return 0;
		1287	}
		1288
		1289	/*****************************************************************************/
		1290	/* requests implemented outside eio_execute, because they are so large */
		1291
		1292	static void
		1293	eio__realpath (eio_req *req, etp_worker *self)
		1294	{
		1295	char *rel = req->ptr1;
		1296	char *res;
		1297	char *tmp1, *tmp2;
		1298	#if SYMLOOP_MAX > 32
		1299	int symlinks = SYMLOOP_MAX;
		1300	#else
		1301	int symlinks = 32;
		1302	#endif
		1303
		1304	req->result = -1;
		1305
		1306	errno = EINVAL;
		1307	if (!rel)
		1308	return;
		1309
		1310	errno = ENOENT;
		1311	if (!*rel)
		1312	return;
		1313
		1314	if (!req->ptr2)
		1315	{
		1316	X_LOCK (wrklock);
		1317	req->flags |= EIO_FLAG_PTR2_FREE;
		1318	X_UNLOCK (wrklock);
		1319	req->ptr2 = malloc (PATH_MAX * 3);
		1320
		1321	errno = ENOMEM;
		1322	if (!req->ptr2)
		1323	return;
		1324	}
		1325
		1326	res = req->ptr2;
		1327	tmp1 = res + PATH_MAX;
		1328	tmp2 = tmp1 + PATH_MAX;
		1329
		1330	#if 0 /* disabled, the musl way to do things is just too racy */
		1331	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1332	/* on linux we may be able to ask the kernel */
		1333	{
		1334	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1335
		1336	if (fd >= 0)
		1337	{
		1338	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1339	req->result = readlink (tmp1, res, PATH_MAX);
		1340	close (fd);
		1341
		1342	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1343
		1344	if (req->result > 0)
		1345	goto done;
		1346	}
		1347	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1348	return;
		1349	}
		1350	#endif
		1351	#endif
		1352
		1353	if (*rel != '/')
		1354	{
		1355	if (!getcwd (res, PATH_MAX))
		1356	return;
		1357
		1358	if (res [1]) /* only use if not / */
		1359	res += strlen (res);
		1360	}
		1361
		1362	while (*rel)
		1363	{
		1364	ssize_t len, linklen;
		1365	char *beg = rel;
		1366
		1367	while (*rel && *rel != '/')
		1368	++rel;
		1369
		1370	len = rel - beg;
		1371
		1372	if (!len) /* skip slashes */
		1373	{
		1374	++rel;
		1375	continue;
		1376	}
		1377
		1378	if (beg [0] == '.')
		1379	{
		1380	if (len == 1)
		1381	continue; /* . - nop */
		1382
		1383	if (beg [1] == '.' && len == 2)
		1384	{
		1385	/* .. - back up one component, if possible */
		1386
		1387	while (res != req->ptr2)
		1388	if (*--res == '/')
		1389	break;
		1390
		1391	continue;
		1392	}
		1393	}
		1394
		1395	errno = ENAMETOOLONG;
		1396	if (res + 1 + len + 1 >= tmp1)
		1397	return;
		1398
		1399	/* copy one component */
		1400	*res = '/';
		1401	memcpy (res + 1, beg, len);
		1402
		1403	/* zero-terminate, for readlink */
		1404	res [len + 1] = 0;
		1405
		1406	/* now check if it's a symlink */
		1407	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1408
		1409	if (linklen < 0)
		1410	{
		1411	if (errno != EINVAL)
		1412	return;
		1413
		1414	/* it's a normal directory. hopefully */
		1415	res += len + 1;
		1416	}
		1417	else
		1418	{
		1419	/* yay, it was a symlink - build new path in tmp2 */
		1420	int rellen = strlen (rel);
		1421
		1422	errno = ENAMETOOLONG;
		1423	if (linklen + 1 + rellen >= PATH_MAX)
		1424	return;
		1425
		1426	errno = ELOOP;
		1427	if (!--symlinks)
		1428	return;
		1429
		1430	if (*tmp1 == '/')
		1431	res = req->ptr2; /* symlink resolves to an absolute path */
		1432
		1433	/* we need to be careful, as rel might point into tmp2 already */
		1434	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1435	tmp2 [linklen] = '/';
		1436	memcpy (tmp2, tmp1, linklen);
		1437
		1438	rel = tmp2;
		1439	}
		1440	}
		1441
		1442	/* special case for the lone root path */
		1443	if (res == req->ptr2)
		1444	*res++ = '/';
		1445
		1446	req->result = res - (char *)req->ptr2;
		1447
		1448	done:
		1449	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1450	}
		1451
		1452	static signed char
		1453	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1454	{
		1455	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1456	: a->inode < b->inode ? -1
		1457	: a->inode > b->inode ? 1
		1458	: 0;
		1459	}
		1460
		1461	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1462
		1463	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1464	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1465
		1466	static void
		1467	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1468	{
		1469	unsigned char bits [9 + sizeof (ino_t) * 8];
		1470	unsigned char *bit = bits;
		1471
		1472	assert (CHAR_BIT == 8);
		1473	assert (sizeof (eio_dirent) * 8 < 256);
		1474	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1475	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1476
		1477	if (size <= EIO_SORT_FAST)
		1478	return;
		1479
		1480	/* first prepare an array of bits to test in our radix sort */
		1481	/* try to take endianness into account, as well as differences in ino_t sizes */
		1482	/* inode_bits must contain all inodes ORed together */
		1483	/* which is used to skip bits that are 0 everywhere, which is very common */
		1484	{
		1485	ino_t endianness;
		1486	int i, j;
		1487
		1488	/* we store the byte offset of byte n into byte n of "endianness" */
		1489	for (i = 0; i < sizeof (ino_t); ++i)
		1490	((unsigned char *)&endianness)[i] = i;
		1491
		1492	*bit++ = 0;
		1493
		1494	for (i = 0; i < sizeof (ino_t); ++i)
		1495	{
		1496	/* shifting off the byte offsets out of "endianness" */
		1497	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1498	endianness >>= 8;
		1499
		1500	for (j = 0; j < 8; ++j)
		1501	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1502	*bit++ = offs + j;
		1503	}
		1504
		1505	for (j = 0; j < 8; ++j)
		1506	if (score_bits & (1 << j))
		1507	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1508	}
		1509
		1510	/* now actually do the sorting (a variant of MSD radix sort) */
		1511	{
		1512	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
		1513	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
		1514	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
		1515	int stk_idx = 0;
		1516
		1517	base_stk [stk_idx] = dents;
		1518	end_stk [stk_idx] = dents + size;
		1519	bit_stk [stk_idx] = bit - 1;
		1520
		1521	do
		1522	{
		1523	base = base_stk [stk_idx];
		1524	end = end_stk [stk_idx];
		1525	bit = bit_stk [stk_idx];
		1526
		1527	for (;;)
		1528	{
		1529	unsigned char O = *bit >> 3;
		1530	unsigned char M = 1 << (*bit & 7);
		1531
		1532	eio_dirent *a = base;
		1533	eio_dirent *b = end;
		1534
		1535	if (b - a < EIO_SORT_CUTOFF)
		1536	break;
		1537
		1538	/* now bit-partition the array on the bit */
		1539	/* this ugly asymmetric loop seems to perform much better than typical */
		1540	/* partition algos found in the literature */
		1541	do
		1542	if (!(((unsigned char *)a)[O] & M))
		1543	++a;
		1544	else if (!(((unsigned char *)--b)[O] & M))
		1545	{
		1546	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1547	++a;
		1548	}
		1549	while (b > a);
		1550
		1551	/* next bit, or stop, if no bits left in this path */
		1552	if (!*--bit)
		1553	break;
		1554
		1555	base_stk [stk_idx] = a;
		1556	end_stk [stk_idx] = end;
		1557	bit_stk [stk_idx] = bit;
		1558	++stk_idx;
		1559
		1560	end = a;
		1561	}
		1562	}
		1563	while (stk_idx--);
		1564	}
		1565	}
		1566
		1567	static void
		1568	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1569	{
		1570	/* first move the smallest element to the front, to act as a sentinel */
		1571	{
		1572	int i;
		1573	eio_dirent *min = dents;
		1574
		1575	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1576	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1577	if (EIO_DENT_CMP (dents [i], <, *min))
		1578	min = &dents [i];
		1579
		1580	/* swap elements 0 and j (minimum) */
		1581	{
		1582	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1583	}
		1584	}
		1585
		1586	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1587	{
		1588	eio_dirent *i, *j;
		1589
		1590	for (i = dents + 1; i < dents + size; ++i)
		1591	{
		1592	eio_dirent value = *i;
		1593
		1594	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1595	j [1] = j [0];
		1596
		1597	j [1] = value;
		1598	}
		1599	}
		1600	}
		1601
		1602	static void
		1603	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1604	{
		1605	if (size <= 1)
		1606	return; /* our insertion sort relies on size > 0 */
		1607
		1608	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1609	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1610	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1611
		1612	/* use an insertion sort at the end, or for small arrays, */
		1613	/* as insertion sort is more efficient for small partitions */
		1614	eio_dent_insertion_sort (dents, size);
		1615	}
		1616
709	/* read a full directory */	1617	/* read a full directory */
		1618	static void
710	static void scandir_ (eio_req *req, worker *self)	1619	eio__scandir (eio_req *req, etp_worker *self)
711	{	1620	{
712	DIR *dirp;	1621	DIR *dirp;
713	union
714	{
715	EIO_STRUCT_DIRENT d;
716	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717	} *u;
718	EIO_STRUCT_DIRENT *entp;	1622	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	1623	char *name, *names;
720	int memlen = 4096;	1624	int namesalloc = 4096;
721	int memofs = 0;	1625	int namesoffs = 0;
		1626	int flags = req->int1;
		1627	eio_dirent *dents = 0;
		1628	int dentalloc = 128;
722	int res = 0;	1629	int dentoffs = 0;
		1630	ino_t inode_bits = 0;
		1631
		1632	req->result = -1;
		1633
		1634	if (!(flags & EIO_READDIR_DENTS))
		1635	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
723		1636
724	X_LOCK (wrklock);	1637	X_LOCK (wrklock);
		1638	/* the corresponding closedir is in ETP_WORKER_CLEAR */
725	self->dirp = dirp = opendir (req->ptr1);	1639	self->dirp = dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));	1640
727	req->flags |= EIO_FLAG_PTR2_FREE;	1641	if (req->flags & EIO_FLAG_PTR1_FREE)
		1642	free (req->ptr1);
		1643
		1644	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1645	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
728	req->ptr2 = names = malloc (memlen);	1646	req->ptr2 = names = malloc (namesalloc);
729	X_UNLOCK (wrklock);	1647	X_UNLOCK (wrklock);
730		1648
731	if (dirp && u && names)	1649	if (dirp && names && (!flags || dents))
732	for (;;)	1650	for (;;)
733	{	1651	{
734	errno = 0;	1652	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	1653	entp = readdir (dirp);
736		1654
737	if (!entp)	1655	if (!entp)
		1656	{
		1657	if (errno)
		1658	break;
		1659
		1660	/* sort etc. */
		1661	req->int1 = flags;
		1662	req->result = dentoffs;
		1663
		1664	if (flags & EIO_READDIR_STAT_ORDER)
		1665	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1666	else if (flags & EIO_READDIR_DIRS_FIRST)
		1667	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1668	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1669	else
		1670	{
		1671	/* in this case, all is known, and we just put dirs first and sort them */
		1672	eio_dirent *oth = dents + dentoffs;
		1673	eio_dirent *dir = dents;
		1674
		1675	/* now partition dirs to the front, and non-dirs to the back */
		1676	/* by walking from both sides and swapping if necessary */
		1677	while (oth > dir)
		1678	{
		1679	if (dir->type == EIO_DT_DIR)
		1680	++dir;
		1681	else if ((--oth)->type == EIO_DT_DIR)
		1682	{
		1683	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1684
		1685	++dir;
		1686	}
		1687	}
		1688
		1689	/* now sort the dirs only (dirs all have the same score) */
		1690	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1691	}
		1692
738	break;	1693	break;
		1694	}
739		1695
		1696	/* now add the entry to our list(s) */
740	name = entp->d_name;	1697	name = entp->d_name;
741		1698
		1699	/* skip . and .. entries */
742	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1700	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
743	{	1701	{
744	int len = strlen (name) + 1;	1702	int len = D_NAMLEN (entp) + 1;
745		1703
746	res++;	1704	while (ecb_expect_false (namesoffs + len > namesalloc))
747
748	while (memofs + len > memlen)
749	{	1705	{
750	memlen *= 2;	1706	namesalloc *= 2;
751	X_LOCK (wrklock);	1707	X_LOCK (wrklock);
752	req->ptr2 = names = realloc (names, memlen);	1708	req->ptr2 = names = realloc (names, namesalloc);
753	X_UNLOCK (wrklock);	1709	X_UNLOCK (wrklock);
754		1710
755	if (!names)	1711	if (!names)
756	break;	1712	break;
757	}	1713	}
758		1714
759	memcpy (names + memofs, name, len);	1715	memcpy (names + namesoffs, name, len);
		1716
		1717	if (dents)
		1718	{
		1719	struct eio_dirent *ent;
		1720
		1721	if (ecb_expect_false (dentoffs == dentalloc))
		1722	{
		1723	dentalloc *= 2;
		1724	X_LOCK (wrklock);
		1725	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1726	X_UNLOCK (wrklock);
		1727
		1728	if (!dents)
		1729	break;
		1730	}
		1731
		1732	ent = dents + dentoffs;
		1733
		1734	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1735	ent->namelen = len - 1;
		1736	ent->inode = D_INO (entp);
		1737
		1738	inode_bits |= ent->inode;
		1739
		1740	switch (D_TYPE (entp))
		1741	{
		1742	default:
		1743	ent->type = EIO_DT_UNKNOWN;
		1744	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1745	break;
		1746
		1747	#ifdef DT_FIFO
		1748	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1749	#endif
		1750	#ifdef DT_CHR
		1751	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1752	#endif
		1753	#ifdef DT_MPC
		1754	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1755	#endif
		1756	#ifdef DT_DIR
		1757	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1758	#endif
		1759	#ifdef DT_NAM
		1760	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1761	#endif
		1762	#ifdef DT_BLK
		1763	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1764	#endif
		1765	#ifdef DT_MPB
		1766	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1767	#endif
		1768	#ifdef DT_REG
		1769	case DT_REG: ent->type = EIO_DT_REG; break;
		1770	#endif
		1771	#ifdef DT_NWK
		1772	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1773	#endif
		1774	#ifdef DT_CMP
		1775	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1776	#endif
		1777	#ifdef DT_LNK
		1778	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1779	#endif
		1780	#ifdef DT_SOCK
		1781	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1782	#endif
		1783	#ifdef DT_DOOR
		1784	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1785	#endif
		1786	#ifdef DT_WHT
		1787	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1788	#endif
		1789	}
		1790
		1791	ent->score = 7;
		1792
		1793	if (flags & EIO_READDIR_DIRS_FIRST)
		1794	{
		1795	if (ent->type == EIO_DT_UNKNOWN)
		1796	{
		1797	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1798	ent->score = 1;
		1799	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1800	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1801	}
		1802	else if (ent->type == EIO_DT_DIR)
		1803	ent->score = 0;
		1804	}
		1805	}
		1806
760	memofs += len;	1807	namesoffs += len;
		1808	++dentoffs;
		1809	}
		1810
		1811	if (EIO_CANCELLED (req))
		1812	{
		1813	errno = ECANCELED;
		1814	break;
761	}	1815	}
762	}	1816	}
763
764	if (errno)
765	res = -1;
766
767	req->result = res;
768	}	1817	}
769		1818
770	/*****************************************************************************/	1819	/*****************************************************************************/
771		1820
772	#define ALLOC(len) \	1821	#define ALLOC(len) \
…		…
782	req->result = -1; \	1831	req->result = -1; \
783	break; \	1832	break; \
784	} \	1833	} \
785	}	1834	}
786		1835
787	X_THREAD_PROC (eio_proc)	1836	X_THREAD_PROC (etp_proc)
788	{	1837	{
789	eio_req *req;	1838	ETP_REQ *req;
790	struct timespec ts;	1839	struct timespec ts;
791	worker *self = (worker *)thr_arg;	1840	etp_worker *self = (etp_worker *)thr_arg;
		1841	int timeout;
792		1842
793	/* try to distribute timeouts somewhat randomly */	1843	/* try to distribute timeouts somewhat evenly */
794	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1844	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795		1845
796	for (;;)	1846	for (;;)
797	{	1847	{
798	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1848	ts.tv_sec = 0;
799		1849
800	X_LOCK (reqlock);	1850	X_LOCK (reqlock);
801		1851
802	for (;;)	1852	for (;;)
803	{	1853	{
804	self->req = req = reqq_shift (&req_queue);	1854	self->req = req = reqq_shift (&req_queue);
805		1855
806	if (req)	1856	if (req)
807	break;	1857	break;
808		1858
		1859	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1860	{
		1861	X_UNLOCK (reqlock);
		1862	X_LOCK (wrklock);
		1863	--started;
		1864	X_UNLOCK (wrklock);
		1865	goto quit;
		1866	}
		1867
809	++idle;	1868	++idle;
810		1869
811	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1870	if (idle <= max_idle)
		1871	/* we are allowed to idle, so do so without any timeout */
		1872	X_COND_WAIT (reqwait, reqlock);
		1873	else
812	{	1874	{
813	if (idle > max_idle)	1875	/* initialise timeout once */
814	{	1876	if (!ts.tv_sec)
815	--idle;	1877	ts.tv_sec = time (0) + idle_timeout;
816	X_UNLOCK (reqlock);
817	X_LOCK (wrklock);
818	--started;
819	X_UNLOCK (wrklock);
820	goto quit;
821	}
822		1878
823	/* we are allowed to idle, so do so without any timeout */
824	X_COND_WAIT (reqwait, reqlock);	1879	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
825	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1880	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
826	}	1881	}
827		1882
828	--idle;	1883	--idle;
829	}	1884	}
830		1885
831	--nready;	1886	--nready;
832		1887
833	X_UNLOCK (reqlock);	1888	X_UNLOCK (reqlock);
834		1889
835	errno = 0; /* strictly unnecessary */
836
837	if (!EIO_CANCELLED (req))
838	switch (req->type)	1890	if (req->type < 0)
839	{
840	case EIO_READ: ALLOC (req->size);
841	req->result = req->offs >= 0
842	? pread (req->int1, req->ptr2, req->size, req->offs)
843	: read (req->int1, req->ptr2, req->size); break;
844	case EIO_WRITE: req->result = req->offs >= 0
845	? pwrite (req->int1, req->ptr2, req->size, req->offs)
846	: write (req->int1, req->ptr2, req->size); break;
847
848	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
849	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
850
851	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
853	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
854	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
855	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
856	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
857
858	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
859	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
860	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
861	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
862	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
863	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
864
865	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
866	case EIO_CLOSE: req->result = close (req->int1); break;
867	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
868	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
869	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
870	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
871	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
872	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
873	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
874	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
875
876	case EIO_READLINK: ALLOC (NAME_MAX);
877	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
878
879	case EIO_SYNC: req->result = 0; sync (); break;
880	case EIO_FSYNC: req->result = fsync (req->int1); break;
881	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
882
883	case EIO_READDIR: scandir_ (req, self); break;
884
885	case EIO_BUSY:
886	#ifdef _WIN32
887	Sleep (req->nv1 * 1000.);
888	#else
889	{
890	struct timeval tv;
891
892	tv.tv_sec = req->nv1;
893	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
894
895	req->result = select (0, 0, 0, 0, &tv);
896	}
897	#endif
898	break;
899
900	case EIO_UTIME:
901	case EIO_FUTIME:
902	{
903	struct timeval tv[2];
904	struct timeval *times;
905
906	if (req->nv1 != -1. || req->nv2 != -1.)
907	{
908	tv[0].tv_sec = req->nv1;
909	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
910	tv[1].tv_sec = req->nv2;
911	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
912
913	times = tv;
914	}
915	else
916	times = 0;
917
918
919	req->result = req->type == EIO_FUTIME
920	? futimes (req->int1, times)
921	: utimes (req->ptr1, times);
922	}
923
924	case EIO_GROUP:
925	case EIO_NOP:
926	break;
927
928	case EIO_QUIT:
929	goto quit;	1891	goto quit;
930		1892
931	default:	1893	ETP_EXECUTE (self, req);
932	req->result = -1;
933	break;
934	}
935
936	req->errorno = errno;
937		1894
938	X_LOCK (reslock);	1895	X_LOCK (reslock);
939		1896
940	++npending;	1897	++npending;
941		1898
942	if (!reqq_push (&res_queue, req) && want_poll_cb)	1899	if (!reqq_push (&res_queue, req) && want_poll_cb)
943	want_poll_cb ();	1900	want_poll_cb ();
944		1901
945	self->req = 0;	1902	self->req = 0;
946	worker_clear (self);	1903	etp_worker_clear (self);
947		1904
948	X_UNLOCK (reslock);	1905	X_UNLOCK (reslock);
949	}	1906	}
950		1907
951	quit:	1908	quit:
952	X_LOCK (wrklock);	1909	X_LOCK (wrklock);
953	worker_free (self);	1910	etp_worker_free (self);
954	X_UNLOCK (wrklock);	1911	X_UNLOCK (wrklock);
955		1912
956	return 0;	1913	return 0;
957	}	1914	}
958		1915
959	/*****************************************************************************/	1916	/*****************************************************************************/
960		1917
961	static void eio_atfork_prepare (void)	1918	int ecb_cold
962	{
963	X_LOCK (wrklock);
964	X_LOCK (reqlock);
965	X_LOCK (reslock);
966	#if !HAVE_PREADWRITE
967	X_LOCK (preadwritelock);
968	#endif
969	#if !HAVE_READDIR_R
970	X_LOCK (readdirlock);
971	#endif
972	}
973
974	static void eio_atfork_parent (void)
975	{
976	#if !HAVE_READDIR_R
977	X_UNLOCK (readdirlock);
978	#endif
979	#if !HAVE_PREADWRITE
980	X_UNLOCK (preadwritelock);
981	#endif
982	X_UNLOCK (reslock);
983	X_UNLOCK (reqlock);
984	X_UNLOCK (wrklock);
985	}
986
987	static void eio_atfork_child (void)
988	{
989	eio_req *prv;
990
991	while (prv = reqq_shift (&req_queue))
992	eio_destroy (prv);
993
994	while (prv = reqq_shift (&res_queue))
995	eio_destroy (prv);
996
997	while (wrk_first.next != &wrk_first)
998	{
999	worker *wrk = wrk_first.next;
1000
1001	if (wrk->req)
1002	eio_destroy (wrk->req);
1003
1004	worker_clear (wrk);
1005	worker_free (wrk);
1006	}
1007
1008	started = 0;
1009	idle = 0;
1010	nreqs = 0;
1011	nready = 0;
1012	npending = 0;
1013
1014	eio_atfork_parent ();
1015	}
1016
1017	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1919	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1018	{	1920	{
1019	want_poll_cb = want_poll;	1921	return etp_init (want_poll, done_poll);
1020	done_poll_cb = done_poll;
1021
1022	#ifdef _WIN32
1023	X_MUTEX_CHECK (wrklock);
1024	X_MUTEX_CHECK (reslock);
1025	X_MUTEX_CHECK (reqlock);
1026	X_MUTEX_CHECK (reqwait);
1027	X_MUTEX_CHECK (preadwritelock);
1028	X_MUTEX_CHECK (readdirlock);
1029
1030	X_COND_CHECK (reqwait);
1031	#endif
1032
1033	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1034	}	1922	}
1035		1923
		1924	ecb_inline void
1036	static void eio_api_destroy (eio_req *req)	1925	eio_api_destroy (eio_req *req)
1037	{	1926	{
1038	free (req);	1927	free (req);
1039	}	1928	}
1040		1929
1041	#define REQ(rtype) \	1930	#define REQ(rtype) \
…		…
1043	\	1932	\
1044	req = (eio_req *)calloc (1, sizeof *req); \	1933	req = (eio_req *)calloc (1, sizeof *req); \
1045	if (!req) \	1934	if (!req) \
1046	return 0; \	1935	return 0; \
1047	\	1936	\
1048	req->type = EIO_ ## rtype; \	1937	req->type = rtype; \
1049	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1938	req->pri = pri; \
1050	req->finish = cb; \	1939	req->finish = cb; \
		1940	req->data = data; \
1051	req->destroy = eio_api_destroy;	1941	req->destroy = eio_api_destroy;
1052		1942
1053	#define SEND eio_submit (req); return req	1943	#define SEND eio_submit (req); return req
1054		1944
1055	#define PATH (void)0	1945	#define PATH \
		1946	req->flags |= EIO_FLAG_PTR1_FREE; \
		1947	req->ptr1 = strdup (path); \
		1948	if (!req->ptr1) \
		1949	{ \
		1950	eio_api_destroy (req); \
		1951	return 0; \
		1952	}
1056		1953
		1954	static void
		1955	eio_execute (etp_worker *self, eio_req *req)
		1956	{
		1957	if (ecb_expect_false (EIO_CANCELLED (req)))
		1958	{
		1959	req->result = -1;
		1960	req->errorno = ECANCELED;
		1961	return;
		1962	}
		1963
		1964	switch (req->type)
		1965	{
		1966	case EIO_READ: ALLOC (req->size);
		1967	req->result = req->offs >= 0
		1968	? pread (req->int1, req->ptr2, req->size, req->offs)
		1969	: read (req->int1, req->ptr2, req->size); break;
		1970	case EIO_WRITE: req->result = req->offs >= 0
		1971	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1972	: write (req->int1, req->ptr2, req->size); break;
		1973
		1974	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1975	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1976
		1977	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1978	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1979	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1980	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1981	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1982	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1983
		1984	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1985	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1986	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1987	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1988
		1989	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1990	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1991	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1992	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1993	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1994	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1995
		1996	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1997	case EIO_CLOSE: req->result = close (req->int1); break;
		1998	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1999	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		2000	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		2001	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2002	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2003	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2004	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2005	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2006
		2007	case EIO_REALPATH: eio__realpath (req, self); break;
		2008
		2009	case EIO_READLINK: ALLOC (PATH_MAX);
		2010	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2011
		2012	case EIO_SYNC: req->result = 0; sync (); break;
		2013	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2014	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2015	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2016	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2017	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2018	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2019	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2020	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2021
		2022	case EIO_READDIR: eio__scandir (req, self); break;
		2023
		2024	case EIO_BUSY:
		2025	#ifdef _WIN32
		2026	Sleep (req->nv1 * 1e3);
		2027	#else
		2028	{
		2029	struct timeval tv;
		2030
		2031	tv.tv_sec = req->nv1;
		2032	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
		2033
		2034	req->result = select (0, 0, 0, 0, &tv);
		2035	}
		2036	#endif
		2037	break;
		2038
		2039	case EIO_UTIME:
		2040	case EIO_FUTIME:
		2041	{
		2042	struct timeval tv[2];
		2043	struct timeval *times;
		2044
		2045	if (req->nv1 != -1. || req->nv2 != -1.)
		2046	{
		2047	tv[0].tv_sec = req->nv1;
		2048	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2049	tv[1].tv_sec = req->nv2;
		2050	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2051
		2052	times = tv;
		2053	}
		2054	else
		2055	times = 0;
		2056
		2057	req->result = req->type == EIO_FUTIME
		2058	? futimes (req->int1, times)
		2059	: utimes (req->ptr1, times);
		2060	}
		2061	break;
		2062
		2063	case EIO_GROUP:
		2064	abort (); /* handled in eio_request */
		2065
		2066	case EIO_NOP:
		2067	req->result = 0;
		2068	break;
		2069
		2070	case EIO_CUSTOM:
		2071	req->feed (req);
		2072	break;
		2073
		2074	default:
		2075	errno = ENOSYS;
		2076	req->result = -1;
		2077	break;
		2078	}
		2079
		2080	req->errorno = errno;
		2081	}
		2082
		2083	#ifndef EIO_NO_WRAPPERS
		2084
		2085	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2086	{
		2087	REQ (EIO_NOP); SEND;
		2088	}
		2089
		2090	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2091	{
		2092	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2093	}
		2094
1057	eio_req *eio_fsync (int fd, eio_cb cb)	2095	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1058	{	2096	{
		2097	REQ (EIO_SYNC); SEND;
		2098	}
		2099
		2100	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2101	{
1059	REQ (FSYNC); req->int1 = fd; SEND;	2102	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060	}	2103	}
1061		2104
		2105	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2106	{
		2107	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2108	}
		2109
		2110	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2111	{
		2112	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2113	}
		2114
		2115	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2116	{
		2117	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2118	}
		2119
		2120	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2121	{
		2122	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2123	}
		2124
		2125	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2126	{
		2127	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2128	}
		2129
		2130	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2131	{
		2132	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2133	}
		2134
1062	eio_req *eio_fdatasync (int fd, eio_cb cb)	2135	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1063	{	2136	{
1064	REQ (FDATASYNC); req->int1 = fd; SEND;	2137	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065	}	2138	}
1066		2139
		2140	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2141	{
		2142	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2143	}
		2144
1067	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	2145	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1068	{	2146	{
1069	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2147	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1070	}	2148	}
1071		2149
1072	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2150	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	2151	{
1074	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2152	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	2153	}
1076		2154
1077	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2155	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1078	{	2156	{
1079	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2157	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1080	}	2158	}
1081		2159
1082	eio_req *eio_fstat (int fd, eio_cb cb)	2160	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1083	{	2161	{
1084	REQ (FSTAT); req->int1 = fd; SEND;	2162	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085	}	2163	}
1086		2164
		2165	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2166	{
		2167	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2168	}
		2169
1087	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	2170	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1088	{	2171	{
1089	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2172	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1090	}	2173	}
1091		2174
1092	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	2175	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1093	{	2176	{
1094	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	2177	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095	}	2178	}
1096		2179
1097	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	2180	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1098	{	2181	{
1099	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2182	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100	}	2183	}
1101		2184
1102	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	2185	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1103	{	2186	{
1104	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2187	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1105	}	2188	}
1106		2189
1107	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	2190	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1108	{	2191	{
1109	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	2192	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110	}	2193	}
1111		2194
1112	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	2195	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1113	{	2196	{
1114	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	2197	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1115	}	2198	}
1116		2199
1117	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	2200	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1118	{	2201	{
1119	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	2202	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120	}	2203	}
1121		2204
1122	eio_req *eio_readlink (const char *path, eio_cb cb)
1123	{
1124	REQ (READLINK); PATH; SEND;
1125	}
1126
1127	eio_req *eio_stat (const char *path, eio_cb cb)
1128	{
1129	REQ (STAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_lstat (const char *path, eio_cb cb)
1133	{
1134	REQ (LSTAT); PATH; SEND;
1135	}
1136
1137	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	2205	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1138	{	2206	{
1139	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	2207	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140	}	2208	}
1141		2209
1142	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	2210	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1143	{	2211	{
1144	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	2212	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145	}	2213	}
1146		2214
1147	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	2215	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1148	{	2216	{
1149	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2217	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1150	}	2218	}
1151		2219
1152	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	2220	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	2221	{
1154	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	2222	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155	}	2223	}
1156		2224
1157	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	2225	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1158	{	2226	{
1159	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	2227	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160	}	2228	}
1161		2229
1162	eio_req *eio_unlink (const char *path, eio_cb cb)	2230	static eio_req *
		2231	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1163	{	2232	{
1164	REQ (UNLINK); PATH; SEND;
1165	}
1166
1167	eio_req *eio_rmdir (const char *path, eio_cb cb)
1168	{
1169	REQ (RMDIR); PATH; SEND;	2233	REQ (type); PATH; SEND;
1170	}	2234	}
1171		2235
		2236	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2237	{
		2238	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2239	}
		2240
		2241	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2242	{
		2243	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2244	}
		2245
		2246	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2247	{
		2248	return eio__1path (EIO_STAT, path, pri, cb, data);
		2249	}
		2250
		2251	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2252	{
		2253	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2254	}
		2255
		2256	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2257	{
		2258	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2259	}
		2260
		2261	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2262	{
		2263	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2264	}
		2265
1172	eio_req *eio_readdir (const char *path, eio_cb cb)	2266	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1173	{	2267	{
1174	REQ (READDIR); PATH; SEND;	2268	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1175	}	2269	}
1176		2270
		2271	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2272	{
		2273	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2274	}
		2275
1177	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	2276	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1178	{	2277	{
1179	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	2278	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1180	}	2279	}
1181		2280
1182	eio_req *eio_busy (double delay, eio_cb cb)	2281	static eio_req *
		2282	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1183	{	2283	{
1184	REQ (BUSY); req->nv1 = delay; SEND;	2284	REQ (type); PATH;
1185	}
1186		2285
		2286	req->flags |= EIO_FLAG_PTR2_FREE;
		2287	req->ptr2 = strdup (new_path);
		2288	if (!req->ptr2)
		2289	{
		2290	eio_api_destroy (req);
		2291	return 0;
		2292	}
		2293
		2294	SEND;
		2295	}
		2296
		2297	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2298	{
		2299	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2300	}
		2301
		2302	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2303	{
		2304	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2305	}
		2306
		2307	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2308	{
		2309	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2310	}
		2311
		2312	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2313	{
		2314	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2315	}
		2316
		2317	#endif
		2318
1187	eio_req *eio_nop (eio_cb cb)	2319	eio_req *eio_grp (eio_cb cb, void *data)
1188	{	2320	{
		2321	const int pri = EIO_PRI_MAX;
		2322
1189	REQ (NOP); SEND;	2323	REQ (EIO_GROUP); SEND;
1190	}	2324	}
1191		2325
1192	#undef REQ	2326	#undef REQ
1193	#undef PATH	2327	#undef PATH
1194	#undef SEND	2328	#undef SEND
1195		2329
1196	#if 0	2330	/*****************************************************************************/
		2331	/* grp functions */
1197		2332
1198	void	2333	void
1199	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1200	PROTOTYPE: $$$;$
1201	PPCODE:
1202	{
1203	dREQ;
1204
1205	req->type = EIO_OPEN;
1206	req->sv1 = newSVsv (pathname);
1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1208	req->int1 = flags;
1209	req->int2 = mode;
1210
1211	EIO_SEND;
1212	}
1213
1214	void
1215	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1216	PROTOTYPE: $;$
1217	ALIAS:
1218	aio_fsync = EIO_FSYNC
1219	aio_fdatasync = EIO_FDATASYNC
1220	PPCODE:
1221	{
1222	dREQ;
1223
1224	req->type = ix;
1225	req->sv1 = newSVsv (fh);
1226	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1227
1228	EIO_SEND (req);
1229	}
1230
1231	void
1232	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1233	PROTOTYPE: $;$
1234	PPCODE:
1235	{
1236	dREQ;
1237
1238	req->type = EIO_CLOSE;
1239	req->sv1 = newSVsv (fh);
1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1241
1242	EIO_SEND (req);
1243	}
1244
1245	void
1246	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1247	ALIAS:
1248	aio_read = EIO_READ
1249	aio_write = EIO_WRITE
1250	PROTOTYPE: $$$$$;$
1251	PPCODE:
1252	{
1253	STRLEN svlen;
1254	char *svptr = SvPVbyte (data, svlen);
1255	UV len = SvUV (length);
1256
1257	SvUPGRADE (data, SVt_PV);
1258	SvPOK_on (data);
1259
1260	if (dataoffset < 0)
1261	dataoffset += svlen;
1262
1263	if (dataoffset < 0 || dataoffset > svlen)
1264	croak ("dataoffset outside of data scalar");
1265
1266	if (ix == EIO_WRITE)
1267	{
1268	/* write: check length and adjust. */
1269	if (!SvOK (length) || len + dataoffset > svlen)
1270	len = svlen - dataoffset;
1271	}
1272	else
1273	{
1274	/* read: grow scalar as necessary */
1275	svptr = SvGROW (data, len + dataoffset + 1);
1276	}
1277
1278	if (len < 0)
1279	croak ("length must not be negative");
1280
1281	{
1282	dREQ;
1283
1284	req->type = ix;
1285	req->sv1 = newSVsv (fh);
1286	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1287	: IoOFP (sv_2io (fh)));
1288	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1289	req->size = len;
1290	req->sv2 = SvREFCNT_inc (data);
1291	req->ptr2 = (char *)svptr + dataoffset;
1292	req->stroffset = dataoffset;
1293
1294	if (!SvREADONLY (data))
1295	{
1296	SvREADONLY_on (data);
1297	req->flags |= FLAG_SV2_RO_OFF;
1298	}
1299
1300	EIO_SEND;
1301	}
1302	}
1303
1304	void
1305	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1306	PROTOTYPE: $$;$
1307	PPCODE:
1308	{
1309	SV *data;
1310	dREQ;
1311
1312	data = newSV (NAME_MAX);
1313	SvPOK_on (data);
1314
1315	req->type = EIO_READLINK;
1316	req->sv1 = newSVsv (path);
1317	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	req->sv2 = data;
1319	req->ptr2 = SvPVbyte_nolen (data);
1320
1321	EIO_SEND;
1322	}
1323
1324	void
1325	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1326	PROTOTYPE: $$$$;$
1327	PPCODE:
1328	{
1329	dREQ;
1330
1331	req->type = EIO_SENDFILE;
1332	req->sv1 = newSVsv (out_fh);
1333	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334	req->sv2 = newSVsv (in_fh);
1335	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336	req->offs = SvVAL64 (in_offset);
1337	req->size = length;
1338
1339	EIO_SEND;
1340	}
1341
1342	void
1343	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1344	PROTOTYPE: $$$;$
1345	PPCODE:
1346	{
1347	dREQ;
1348
1349	req->type = EIO_READAHEAD;
1350	req->sv1 = newSVsv (fh);
1351	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1352	req->offs = SvVAL64 (offset);
1353	req->size = length;
1354
1355	EIO_SEND;
1356	}
1357
1358	void
1359	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1360	ALIAS:
1361	aio_stat = EIO_STAT
1362	aio_lstat = EIO_LSTAT
1363	PPCODE:
1364	{
1365	dREQ;
1366
1367	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1368	if (!req->ptr2)
1369	{
1370	req_destroy (req);
1371	croak ("out of memory during aio_stat statdata allocation");
1372	}
1373
1374	req->flags |= FLAG_PTR2_FREE;
1375	req->sv1 = newSVsv (fh_or_path);
1376
1377	if (SvPOK (fh_or_path))
1378	{
1379	req->type = ix;
1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
1381	}
1382	else
1383	{
1384	req->type = EIO_FSTAT;
1385	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386	}
1387
1388	EIO_SEND;
1389	}
1390
1391	void
1392	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1393	PPCODE:
1394	{
1395	dREQ;
1396
1397	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1398	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1399	req->sv1 = newSVsv (fh_or_path);
1400
1401	if (SvPOK (fh_or_path))
1402	{
1403	req->type = EIO_UTIME;
1404	req->ptr1 = SvPVbyte_nolen (req->sv1);
1405	}
1406	else
1407	{
1408	req->type = EIO_FUTIME;
1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1410	}
1411
1412	EIO_SEND;
1413	}
1414
1415	void
1416	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1417	PPCODE:
1418	{
1419	dREQ;
1420
1421	req->sv1 = newSVsv (fh_or_path);
1422	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1423
1424	if (SvPOK (fh_or_path))
1425	{
1426	req->type = EIO_TRUNCATE;
1427	req->ptr1 = SvPVbyte_nolen (req->sv1);
1428	}
1429	else
1430	{
1431	req->type = EIO_FTRUNCATE;
1432	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1433	}
1434
1435	EIO_SEND;
1436	}
1437
1438	void
1439	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1440	ALIAS:
1441	aio_chmod = EIO_CHMOD
1442	aio_fchmod = EIO_FCHMOD
1443	aio_mkdir = EIO_MKDIR
1444	PPCODE:
1445	{
1446	dREQ;
1447
1448	req->type = type;
1449	req->int2 = mode;
1450	req->sv1 = newSVsv (fh_or_path);
1451
1452	if (ix == EIO_FCHMOD)
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1454	else
1455	req->ptr1 = SvPVbyte_nolen (req->sv1);
1456
1457	EIO_SEND;
1458	}
1459
1460	void
1461	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1462	PPCODE:
1463	{
1464	dREQ;
1465
1466	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1467	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1468	req->sv1 = newSVsv (fh_or_path);
1469
1470	if (SvPOK (fh_or_path))
1471	{
1472	req->type = EIO_CHOWN;
1473	req->ptr1 = SvPVbyte_nolen (req->sv1);
1474	}
1475	else
1476	{
1477	req->type = EIO_FCHOWN;
1478	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1479	}
1480
1481	EIO_SEND;
1482	}
1483
1484	void
1485	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1486	ALIAS:
1487	aio_unlink = EIO_UNLINK
1488	aio_rmdir = EIO_RMDIR
1489	aio_readdir = EIO_READDIR
1490	PPCODE:
1491	{
1492	dREQ;
1493
1494	req->type = ix;
1495	req->sv1 = newSVsv (pathname);
1496	req->ptr1 = SvPVbyte_nolen (req->sv1);
1497
1498	EIO_SEND;
1499	}
1500
1501	void
1502	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1503	ALIAS:
1504	aio_link = EIO_LINK
1505	aio_symlink = EIO_SYMLINK
1506	aio_rename = EIO_RENAME
1507	PPCODE:
1508	{
1509	dREQ;
1510
1511	req->type = ix;
1512	req->sv1 = newSVsv (oldpath);
1513	req->ptr1 = SvPVbyte_nolen (req->sv1);
1514	req->sv2 = newSVsv (newpath);
1515	req->ptr2 = SvPVbyte_nolen (req->sv2);
1516
1517	EIO_SEND;
1518	}
1519
1520	void
1521	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1522	PPCODE:
1523	{
1524	dREQ;
1525
1526	req->type = EIO_MKNOD;
1527	req->sv1 = newSVsv (pathname);
1528	req->ptr1 = SvPVbyte_nolen (req->sv1);
1529	req->int2 = (mode_t)mode;
1530	req->offs = dev;
1531
1532	EIO_SEND;
1533	}
1534
1535	void
1536	aio_busy (double delay, SV *callback=&PL_sv_undef)
1537	PPCODE:
1538	{
1539	dREQ;
1540
1541	req->type = EIO_BUSY;
1542	req->nv1 = delay < 0. ? 0. : delay;
1543
1544	EIO_SEND;
1545	}
1546
1547	void
1548	aio_group (SV *callback=&PL_sv_undef)
1549	PROTOTYPE: ;$
1550	PPCODE:
1551	{
1552	dREQ;
1553
1554	req->type = EIO_GROUP;
1555
1556	req_send (req);
1557	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1558	}
1559
1560	void
1561	aio_nop (SV *callback=&PL_sv_undef)
1562	ALIAS:
1563	aio_nop = EIO_NOP
1564	aio_sync = EIO_SYNC
1565	PPCODE:
1566	{
1567	dREQ;
1568
1569	#endif
1570
1571	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2334	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1572	{	2335	{
1573	grp->int2 = limit;	2336	grp->int2 = limit;
1574	grp->feed = feed;	2337	grp->feed = feed;
1575		2338
1576	grp_try_feed (grp);	2339	grp_try_feed (grp);
1577	}	2340	}
1578		2341
		2342	void
1579	void eio_grp_limit (eio_req *grp, int limit)	2343	eio_grp_limit (eio_req *grp, int limit)
1580	{	2344	{
1581	grp->int2 = limit;	2345	grp->int2 = limit;
1582		2346
1583	grp_try_feed (grp);	2347	grp_try_feed (grp);
1584	}	2348	}
1585		2349
		2350	void
1586	void eio_grp_add (eio_req *grp, eio_req *req)	2351	eio_grp_add (eio_req *grp, eio_req *req)
1587	{	2352	{
1588	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2353	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2354
		2355	grp->flags |= EIO_FLAG_GROUPADD;
1589		2356
1590	++grp->size;	2357	++grp->size;
1591	req->grp = grp;	2358	req->grp = grp;
1592		2359
1593	req->grp_prev = 0;	2360	req->grp_prev = 0;
…		…
1597	grp->grp_first->grp_prev = req;	2364	grp->grp_first->grp_prev = req;
1598		2365
1599	grp->grp_first = req;	2366	grp->grp_first = req;
1600	}	2367	}
1601		2368
		2369	/*****************************************************************************/
		2370	/* misc garbage */
1602		2371
		2372	ssize_t
		2373	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2374	{
		2375	etp_worker wrk;
		2376	ssize_t ret;
		2377
		2378	wrk.dbuf = 0;
		2379
		2380	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
		2381
		2382	if (wrk.dbuf)
		2383	free (wrk.dbuf);
		2384
		2385	return ret;
		2386	}
		2387

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